JP3345705B2 - Fluid ejection device, pressure converter used therefor, and ejection system unit - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fluid ejecting apparatus for ejecting a fluid by transmitting an oscillating pressure to the ejection fluid filled in a storage chamber from the outside, and more particularly to reducing the pressure applied to the ejection fluid storage chamber. The present invention relates to a pressure converter for transmission and an ejection system unit that constitutes a part of a flow path of ejection fluid used here.

[0002]

2. Description of the Related Art Conventionally, various types of fluid ejection devices have been used. In addition to a device that directly pressurizes and ejects a fluid by a pump or the like, an external device for ejecting a fluid filled in a storage chamber can be used. An ejection device that alternately repeats pressurization and depressurization (hereinafter, referred to as vibration pressure in the present specification) to transmit the fluid and continuously discharge the fluid into and from the storage chamber is known. Have been. These perform suction and discharge by the transmitted pressure, and such a pressure transmitting section to the ejection fluid is referred to as a pressure converter section here.

A typical example of a conventionally known pressure converter is a diaphragm pump, for example. In a diaphragm pump, a diaphragm is disposed inside a housing as a membrane plate for a diaphragm, and a diaphragm is provided inside the housing.
One storage chamber is formed, one of the storage chambers is provided with an inflow port and a discharge port, and the inside is filled with a fluid for ejection, the other storage chamber is filled with a driving fluid, and oscillating pressure is applied thereto, The suction and discharge of the ejection fluid are performed by transmitting the ejection fluid to the storage chamber of the ejection fluid via the diaphragm.

[0004] Another example of a fluid ejection device is a so-called compression pump. This is in the storage chamber of the ejection fluid such as a tube made of an elastic member,
By repeatedly pressing and releasing from the outside, the fluid is discharged by repeating pressurization and depressurization by elastic deformation of the tube.

[0005] Alternatively, there is known a roller pump in which a tubular channel itself made of an elastic member is pressed by a roller, and the roller is rotated and moved to guide the fluid in the moving direction. .

[0006] In recent years, such a fluid ejection device has been so-called a water jet scalpel (incision of an operation site by an ejection fluid.
It has been attempted to apply it to a device for performing resection or the like. When applied to this type of surgical apparatus, a saline solution is generally used as a fluid for ejection. Then, it is necessary to sterilize or sterilize these devices every operation.

[0007]

However, the conventional compression pumps and roller pumps as described above have a drawback that a stable jetting pressure cannot be obtained and a pulsation pressure difference is large. This was a problem that could not be used for the required jetting device. In addition, if a normal pump is used, the lubricating oil of the pump may be mixed into the ejection fluid. Therefore, such a pump should be applied as it is to a device that must avoid the presence of foreign matter in the ejection fluid. Can not.

For example, in a jet scalpel used for an operation or the like, a pressurizing device in which ejection pressure fluctuation due to pulsation is small is required. Further, in order to prevent foreign matter from entering, a pressure converter such as the above-described diaphragm pump is used. An ejection device having a used pressurizing unit has been applied. However, when using a pressure converter such as a diaphragm pump for a surgical device such as a jet scalpel, the following inconvenience occurs.

[0009] That is, instruments used for surgery must be sterilized because the parts that come into direct contact with the human body must be aseptic, especially in the case of using a conventional diaphragm pump as it is, before and after surgery. However, there is a problem that the processing operations such as sterilization and disinfection performed at the same time are complicated and complicated.

For a surgical device such as a jet scalpel, it is necessary to sterilize at least the flow path of the physiological saline, and the nozzle (handpiece) is sterilized together with the scalpel, and the physiological saline and the like are transported on the supply side. The whole container is stored in a sterilized state.

[0011] Since the entire fluid ejection device cannot be sterilized, in a device in which a conventional diaphragm pump is applied as it is, it is necessary to sterilize the liquid contact portion of the main body in the flow path of the physiological saline. For this reason, the diaphragm pump as a pressure converter is removed together with the housing,
Further, it is necessary to disassemble the housing and to sterilize or disinfect each member. In this case, it is necessary to simultaneously sterilize and disinfect the members related to the tidal chamber of the driving fluid that are arranged adjacently.

Since the inside of the housing of the diaphragm pump is hermetically sealed, it is troublesome to disassemble it and perform washing and sterilization, etc., and when assembling it after such processing, human hands are required. May be difficult to maintain. Further, the drive fluid also needs to be removed from the housing each time, and it is necessary to refill the housing after the housing is inserted. Therefore, these operations are complicated, and the processing associated with sterilization requires a lot of labor and time.

In addition, since the physiological saline and the driving fluid are adjacent to each other across one diaphragm in the housing, the driving fluid is mixed into the ejected fluid due to a rupture of the fixed portion around the diaphragm or the diaphragm itself. There is a risk of doing so. Further, when the housing is disassembled, it is necessary to make the storage chamber for storing the ejection fluid and the portion in contact with the ejection fluid aseptic, and the storage chamber to which the driving fluid is sent (the constituent members) is also sterilized and disinfected. Has to be processed.

Further, since these operations are naturally repeated after the operation, sterilization and disinfection of the jetting device related to the jet scalpel before and after the operation is complicated, and in the case where frequent operations are performed repeatedly. , Has become a big problem. On the other hand, in a fluid ejection device other than the jet knife, when the ejection fluid is exchanged or the device is washed, if the housing is disassembled and washed or exchanged, there is a problem that the working efficiency is reduced.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems, and a first object of the present invention is to provide a pressure converter of a fluid ejection device which can easily exchange a liquid contact portion of an ejected fluid. Aim. Another object of the present invention is to provide an ejection system unit suitable for application to the above-described invention. In the present application, the following means are provided to achieve the above object.

[0016]

According to the first aspect of the present invention, there is provided a pressure converter in which an ejection fluid storage chamber for storing ejection fluid and a drive fluid storage chamber for storing drive fluid are disposed adjacent to each other. And a pressurizing means for applying an oscillating pressure to the driving fluid, and transmitting the oscillating pressure through an adjacent portion between the ejection fluid storage chamber and the driving fluid storage chamber, thereby storing the ejection fluid storage. In a fluid ejecting apparatus which causes a chamber to suck a jetting fluid and discharge the jetting fluid from the jetting fluid storage chamber, the jetting fluid storage chamber has a cylindrical shape.
Having a shaped outer wall portion, provided separately and separately from the device main body portion, and configured to be detachable with respect to the pressure converter portion, wherein the driving fluid reservoir is provided with the cylindrical outer wall portion.
A cylindrical hollow portion facing the portion, the pressure converter portion is provided in the pressure converter portion separately from the ejection fluid storage chamber, and the pressure converter portion is the cylindrical shape of the ejection fluid storage chamber.
An outer wall and an inner wall of the cylindrical hollow portion of the driving fluid storage chamber
The vibration pressure is transmitted in a state in which each wall member is in close contact with a portion adjacent to the portion, and the wall member
At least part of the part where each of
And each of the elastic members is capable of transmitting pressure.
Inside the fluid reservoir, the position of the axis of symmetry of the cylindrical outer wall is
Provided is a fluid ejection device, wherein a support member is provided. The operation and effect of this invention will be described in detail in the invention described below.

According to the second aspect of the present invention, the ejection fluid storage chamber for storing the ejection fluid and the drive fluid storage chamber for storing the drive fluid are disposed adjacent to each other and are provided to the drive fluid. By transmitting the oscillating pressure through an adjacent portion between the ejection fluid storage chamber and the driving fluid storage chamber, the ejection fluid is sucked into the ejection fluid storage chamber and the ejection fluid is discharged into the ejection fluid storage chamber. In a pressure converter used in a fluid ejection device that discharges from a pressure converter, the pressure converter is configured to be detachable from a main body of the pressure converter,
An ejection system unit including the ejection fluid storage chamber, an ejection fluid suction unit connected to the ejection fluid storage chamber, and an ejection fluid ejection unit; and a detachable holding unit for the ejection system unit with respect to a main body of the pressure converter. The driving fluid storage chamber is provided independently in the main body part so as to be separated from the ejection fluid storage chamber , and the ejection fluid storage chamber is provided.
Has a cylindrical outer wall, and the driving fluid storage chamber is
A cylindrical hollow portion opposed to the cylindrical outer wall portion;
The dynamic pressure is in front of the cylindrical outer wall of the ejected fluid storage chamber.
Adjacent to the inner wall of the cylindrical hollow portion of the driving fluid storage chamber
The jet fluid storage chamber is transmitted through a section.
And the driving fluid storage chamber, the ejection system unit
Wall members of the part facing each other when mounted inside the main body
At least a part of the elastic portion is capable of transmitting pressure by a fluid.
Each of which is made of a material, and the circle is formed inside the ejection fluid storage chamber.
A pressure converter, wherein a support member is provided at a position of a symmetric axis of a cylindrical outer wall portion .

These inventions provide a pressure converter which is configured to be detachable from a main body (of a fluid ejection device or a pressure converter thereof) by making a liquid contact portion to the ejection fluid independent as an ejection system unit. By independently removing only the ejection system unit from the pressure converter of the fluid ejection device by the holding means, it is possible to easily attach / detach or replace only the ejection system unit.

In the fluid ejection device of the present invention, the ejection fluid is supplied to the ejection fluid storage chamber from the supply source of the ejection fluid to the ejection system unit via the ejection fluid suction portion, and the ejection fluid is supplied to the ejection fluid storage chamber from the outside. The ejection fluid is ejected from the ejection fluid ejection portion by applying the oscillating pressure, and the ejection fluid is ejected from an ejection portion such as a nozzle connected thereto.

As an example, when applied to a jet scalpel, a supply source such as a transportation bag of a physiological saline as a jetting fluid is connected to the jetting fluid suction unit by an infusion tube such as a tube, and a hand is provided. A nozzle such as a piece and the ejection fluid discharge section are connected by an infusion tube such as a tube.

The ejection system unit is a unit that collectively constitutes the members constituting the flow path of the ejection fluid in the main body of the pressure converter and is made independent as a unit. The storage chamber includes an ejection fluid suction section and an ejection fluid discharge section connected to the ejection fluid storage chamber.

The driving fluid storage chamber of the pressure converter is provided inside the main body so as to be separated from the jetting fluid storage chamber. In other words, since the independent driving fluid storage chamber is provided within the main body, Even if the ejection system unit is removed, the driving fluid storage chamber and the driving fluid inside are kept in the main body as they are.

When the ejection system unit is inserted into the main body of the pressure converter, the ejection fluid storage chamber of the ejection system unit and the driving fluid storage chamber in the main body have wall surfaces facing each other. Wall surfaces in opposing portions are each formed of an elastic member.

The material of the elastic member is not particularly limited as long as it is an elastic member capable of transmitting pressure by a fluid. Further, it is not necessary that all of the wall portions are made of such an elastic member, but at least a part of each of the wall surfaces and the mutually opposing portions are made of such an elastic member. Just do it.

Each of the wall portions constituted by the opposed elastic members is the same as the membrane member, and when these are brought into close contact with each other, the transmission of pressure between the storage chambers via the contact portion is performed. Becomes possible. In other words, considering the contact portion as a center, the structure becomes the same as that in which the partition wall of the conventional diaphragm pump is formed of a double elastic member (membrane member).

Therefore, if the wall surface is in close contact with each of the storage chambers filled with the fluid, when the driving fluid filled in the driving fluid storage chamber is pressurized, the pressure is transmitted to the ejection fluid storage chamber. The ejected fluid is discharged from the ejected fluid storage chamber through the ejected fluid discharge unit. When the driving fluid filled in the driving fluid storage chamber is depressurized in this state, the pressure of the jetting fluid storage chamber is also reduced (the pressure is released), so that the jetting fluid flows in from the jetting fluid suction part. When the oscillating pressure is applied to the drive fluid, the pressurization and depressurization are repeated, and the inflow and discharge of the ejected fluid into and from the ejected fluid storage chamber are repeated and continuously discharged.

The structure of the pressurizing means of the present invention is not particularly limited as long as it can transmit the oscillating pressure to the driving fluid filled in the driving fluid storage chamber as described above.

As described above, in the injection device using the pressure converter provided with the injection system unit of the present invention, the flow path of the injection fluid is cleaned (including sterilization and disinfection) before and after use. In this case, the holding means may be released and only the ejection system unit may be removed. In some cases, the ejection system unit may be replaced with a new one as disposable.

That is, since the ejection system unit of the present invention includes all the liquid contact parts in the pressure converter in such a flow path of the ejection fluid, if only the ejection system unit is detached and attached, the ejection fluid Cleaning of the main body related to the liquid contact part is unnecessary.

For example, when the present invention is applied to a jet scalpel, it is only necessary to sterilize the jetting unit before using the apparatus, and to clean the main body after removing the jetting unit after use. You don't have to. further,
If cleaning after use is troublesome, the jetting system unit itself can be replaced and used immediately when newly used.

In addition, the jetting system unit after use can be disposable as it is. In particular, in recent years, there is a problem in the integrity of sterilization and the like, and the demand for such a disposable system is increasing. Therefore, a jet scalpel excellent in safety can be constructed.

[0032]

In the present invention, the ejection fluid storage chamber has a cylindrical outer wall portion, in other words, a fluid storage chamber having a tubular outer wall. That is, the ejection fluid storage chamber of the present invention is formed inside the tubular outer wall portion formed of the elastic member, and pressure is transmitted from the outside to the inside of the side surface of the cylindrical outer wall. Therefore, there is an advantage that the pressure can be efficiently transmitted to the ejection fluid storage chamber, and since the tubular elastic member can be applied, there is also an advantage that the construction of the ejection system unit is simplified.

For example, if only the partition wall is deformed as in a conventional diaphragm pump, only the deformation of the storage chamber accompanying the deformation affects the pressure fluctuation. However, as in the present invention, pressure is transmitted from the entire circumference. Then, the deformation of the ejection fluid storage chamber provided inside the tubular shape also increases, and the pressure fluctuation due to the deformation of the elastic member is efficiently given to the ejection fluid storage chamber.

Here, the driving fluid storage chamber has a partition wall portion facing at least a part of the outside of the cylindrical outer wall of the ejection fluid storage chamber, and transmits pressure through the opposed portion. Is fine.

[0036]

According to the present invention, the driving fluid storage chamber provided inside the main body and separated from the ejection fluid storage chamber has a cylindrical hollow portion, in other words, a hollow portion hollowed out into a cylindrical shape. Therefore, the driving fluid storage chamber is provided outside the hollow portion.

Then, the inner wall of the hollow portion (side wall portion forming the hollow portion) faces the cylindrical outer wall of the ejection fluid storage chamber, and these wall portions are each formed of the elastic member. I have.

For this reason, the driving fluid storage chamber transmits pressure from the entire circumference of the side surface of the cylindrical hollow portion toward the center of the hollow portion. Is transmitted. Therefore, the mutual pressure transmission is efficiently performed, and the pressure fluctuation due to the elastic deformation of the elastic member is also efficiently performed.

In a preferred embodiment of the pressure converter according to the present invention, an ejection fluid storage chamber for storing ejection fluid and a drive fluid storage chamber for storing drive fluid are disposed adjacent to each other.
By transmitting the vibration pressure applied to the driving fluid through an adjacent portion between the ejection fluid storage chamber and the driving fluid storage chamber, the ejection fluid is sucked into the ejection fluid storage chamber and the ejection fluid is discharged. In a pressure converter used in a fluid ejection device for ejecting fluid from the ejection fluid storage chamber, the ejection fluid storage chamber includes an ejection fluid suction unit and an ejection fluid ejection unit connected to the ejection fluid storage chamber. And the ejection system unit is configured to be detachable from the main body of the pressure converter,
The ejection system unit has a substantially cylindrical outer shape, and the ejection fluid suction unit and the ejection fluid ejection unit are provided on an upper or bottom portion of the substantially columnar shape, and a substantially cylindrical outer surface of the ejection system unit. Wherein at least a part of the cylindrical outer wall portion of the pressure converter is constituted by an outer wall portion of the ejection fluid storage chamber, and the driving fluid storage chamber is separated from the ejection fluid storage chamber and is a main body of the pressure converter. Independently provided in the section, the driving fluid storage chamber of the main body has a cylindrical hollow portion facing the cylindrical outer wall of the ejection fluid storage chamber when the ejection system unit is mounted, The cylindrical outer wall portion of the ejection fluid storage chamber and the inner wall portion of the cylindrical hollow portion of the driving fluid storage chamber are each formed of an elastic member capable of transmitting pressure by a fluid, and the cylindrical outer wall of the ejection system unit is provided. Department and front The inner wall portion of the cylindrical hollow portion of the driving fluid storage chamber is configured to be adjacent to perform pressure transmission, and the main body communicates with the cylindrical hollow portion of the ejection fluid storage chamber, and the ejection system A pressure converter comprising: an insertion portion through which a cylindrical outer shape of a unit can pass; and holding means for holding the ejection system unit mounted inside the main body through the insertion portion.

In the configuration of the pressure converter according to the present invention, the same parts as those described in the above-mentioned invention have the same functions and effects as described above. In the present invention,
The ejection system unit itself is formed in a substantially cylindrical shape, and the upper and lower surfaces thereof are used to dispose the ejection fluid suction section and the ejection fluid ejection section, and the outer wall of the ejection fluid storage chamber (pressure Transmission section).

In other words, the ejected fluid storage chamber has a cylindrical outer shape, and the ejected fluid suction section and the ejected fluid discharge section are disposed at both ends thereof. The advantage of the so-called tube-shaped ejection fluid storage chamber is used as it is, and the ejection fluid suction, which is a liquid contact portion connected thereto, is used by using both ends which are less affected by the deformation of the outer shape due to the deformation of the tube portion. And an ejection fluid ejection unit.

In other words, in order to effectively utilize the side portion, which is a pressure transmitting portion, for the substantially cylindrical ejection system unit, most of the side surface is constituted by the wall surface of the ejection fluid storage chamber,
An ejection fluid suction section and an ejection fluid discharge section are provided by utilizing both ends where pressure transmission is difficult.

Here, one purpose is to make effective use of the upper and lower ends of the ejection system unit cylindrical shape. Therefore, each of the ejection fluid suction section and the ejection fluid discharge section is disposed at one end. Or both may be provided at both ends. In the case of disposing them at both ends, there is an advantage that a cylindrical flow path in the axial direction from the inflow portion to the ejection portion is formed.

Further, the driving fluid storage chamber of the pressure converter main body according to the present invention has a cylindrical hollow portion corresponding to the outer shape of the ejection system unit, and the ejection system unit is inserted here. The side wall (inner wall) of the hollow portion is opposed to the side surface of the ejection system unit, and is formed of the elastic member. That is, when the ejection system unit is mounted, the cylindrical outer wall portion of the ejection fluid storage chamber and the inner wall of the cylindrical hollow portion of the drive fluid storage chamber face each other, and each is formed of an elastic member.

Therefore, if each wall member is brought into close contact,
Since the ejection fluid storage chamber and the drive fluid storage chamber are adjacent to each other with a double partition, pressure can be transmitted from the fluid or the like filled in each of the chambers via the adjacent portions.

Further, an insertion portion communicating with the cylindrical hollow portion of the driving fluid storage chamber is provided in the main body portion of the pressure converter. If the ejection unit is inserted into and removed from the insertion portion, it is particularly preferable. It is not limited. Further, the configuration of the holding means is not particularly limited as long as the holding means detachably holds the ejection system unit inserted from the insertion portion with respect to the main body.

Next, another invention of the present application is an independent ejection system unit used in a fluid ejection device for sucking / discharging ejection fluid into / from an ejection fluid storage chamber by the action of pressure transmitted from the outside. Among the members constituting the flow path of the ejection fluid, an ejection fluid storage chamber for storing at least the ejection fluid, and an ejection fluid suction unit having an inflow port for flowing the ejection fluid into the ejection fluid storage chamber. An ejection fluid discharge unit provided with an ejection port for ejecting ejection fluid from the ejection fluid storage chamber.

According to the present invention, there is provided an ejection system unit in which an ejection fluid storage chamber serving as a pressurizing portion used in a fluid ejection device and a member constituting a flow path connected thereto are integrally formed. By forming the liquid contact portion of the ejected fluid into a single unit, the liquid contact portion of the ejected fluid can be easily cleaned or replaced.

This jet system unit is a jet system unit suitable for the pressure converter according to the invention described above.
The configuration is not particularly limited as long as it is a means capable of transmitting pressure to the ejection fluid storage chamber of the ejection system unit. For example, as in the above-described invention, the pressure transmitted from the outside is not limited to the pressure by the fluid, but can be applied to a mechanical pressure such as a pressure plate.

That is, when the ejection fluid storage chamber of the ejection system unit is pressurized, the ejection fluid filled therein is discharged from the ejection fluid discharge portion to the outside. It flows inside.

A one-way valve (or check valve) that opens only when fluid flows into (or sucks into) the ejection fluid storage chamber is provided on the ejection fluid suction portion side of the ejection system unit or the main body into which the ejection system unit is inserted. Needless to say, a one-way valve (or check valve) is provided on the side of the ejected fluid discharge section, which is opened only when the fluid is ejected (or discharged) from the ejected fluid storage chamber. By the action of these one valves, suction and discharge of fluid are performed based on pressurization and decompression of the ejected fluid storage chamber.

Next, according to another aspect of the present invention, in the ejection system unit according to the invention described above, the ejection system unit has a substantially cylindrical outer shape, and at least a part of the cylindrical side surface portion. Is constituted by an outer wall portion of the ejection fluid storage chamber, and at least a part of a wall member constituting the outer wall portion is constituted by an elastic member capable of transmitting pressure to the ejection fluid storage chamber. To provide a squirting system unit.

According to the present invention, the ejection fluid storage chamber has a cylindrical outer wall, and the whole or a part thereof is formed of an elastic member. That is, the ejection fluid storage chamber is constituted by a space surrounded by a cylindrical elastic member, and pressure is transmitted through an outer wall portion of the elastic member, and the elastic force accompanying the deformation of the elastic member is used. , The pressure in the storage chamber fluctuates.

According to the present invention, pressure is transmitted from the entire outer periphery of the cylindrical outer periphery of the ejection fluid storage chamber toward the center.
Further, since the entire storage chamber is deformed, the pressure fluctuation in the storage chamber is effectively transmitted.

The cylindrical outer wall of the ejection fluid storage chamber can be constructed by applying, for example, a tubular elastic member. The elastic member constituting the outer wall of the storage chamber is configured to transmit at least a pressure applied from the outside to the inside,
The material and the like are not particularly limited. In addition, it is preferable that an elastic force is generated to such an extent that the pressure in the storage chamber fluctuates at the time of elastic deformation or recovery due to external pressure or the like.

Next, according to another aspect of the present invention, in the ejection system unit according to the invention described above, the ejection fluid suction portion is disposed on one end face of the ejection system unit having the cylindrical outer shape. Wherein the ejection fluid discharge portion is provided on the other end face of the ejection system unit.

In the present invention, each member is disposed by efficiently utilizing the cylindrical outer shape of the ejection system unit.
In brief, the side surface portion is formed of an elastic member, and the ejected fluid suction portion and the ejected fluid discharge portion are disposed on the upper surface and the bottom portion.

The interior of the substantially cylindrical ejection system unit is constituted as an ejection fluid storage chamber, and the side surface portion is constituted by the outer wall portion constituted by the elastic member. The configuration is such that the side surface occupying a large area of the outer shape of the unit can be effectively used as a pressure transmitting portion.

In other words, since the side surface of the cylindrical outer shape is constituted by a wall member made of an elastic member capable of being elastically deformed as a pressure transmitting portion, the deformation of this portion greatly affects the volume of the ejected fluid storage chamber. Further, since the vibration pressure is transmitted from the side portion occupying this large area, the efficiency of pressure transmission to the inside is excellent.

Since the ejected fluid suction section and the ejected fluid discharge section are disposed on the upper and lower surfaces which have little effect on internal deformation and pressure transmission, the pressure transmission structure can be simplified. Further, when the ejection system unit is attached to and detached from the main body, if the ejection unit is inserted and removed in the axial direction, the attachment / detachment operation can be simplified.

Next, according to another aspect of the present invention, in the ejection system unit according to the invention described above, the ejection system unit further includes a support member disposed in a symmetric axis direction of the cylindrical outer shape. The support member is held so as to be relatively movable in the axial direction.

The ejection system unit according to the present invention is provided with an ejection fluid storage chamber composed of a space surrounded by an outer wall portion, so that the unit itself is held by the rigidity of only the elastic member. According to the present invention, the support member is provided to maintain the rigidity of the ejection system unit.

The support member is provided along the axial direction of the cylindrical outer shape, and is held so as to be relatively movable in the axial direction. Even if the ejection unit is deformed in a vertical direction, the ejection unit can be deformed (expanded or contracted) in the axial direction. Further, with regard to bending in the axial direction, the support member can maintain a predetermined rigidity.

Further, since this support member is disposed inside the ejection system unit in the symmetric axis direction of the cylindrical outer shape, the degree of elastic deformation of the elastic member due to pressure transmission from outside the unit is determined by the elastic member. It can be limited to a range in which the elastic recovery force for returning to the original state occurs. That is, the elastic member is elastically deformed in accordance with the magnitude of the pressing force from the outside of the unit. If the pressing force is too large, the elastic member may be excessively elastically deformed and the elastic recovery force may not be generated. is there. However, since the support member is disposed inside the ejection system unit in the direction of the symmetric axis of the cylindrical outer shape, no elastic deformation occurs inside the position where the support member is disposed. For this reason, the elastic deformation of the elastic member is limited by the support member, and the degree of deformation can be maintained within a range where the elastic recovery force of the elastic member is sufficiently obtained.

The support member is preferably provided at the center of the shaft inside the ejection fluid storage chamber. If it is provided outside, the pressure transmission structure must be constructed avoiding this support member, and if it is eccentric inside, the distorted deformation of the ejected fluid storage chamber itself and the pressure distribution inside it tend to be uneven It is.

Next, in another invention of the present application, in the ejection system unit according to the invention described above, the ejection fluid storage chamber has a cylindrical elastic member capable of transmitting pressure by a fluid and a cylindrical elastic member. The suction-side end member that covers the opening at both ends and a space closed by a discharge-side end member, wherein the ejection fluid suction portion is disposed in the suction-side end member, and A one-way valve that is opened only when the ejection fluid flows into the fluid storage chamber is provided, and the ejection fluid discharge unit is disposed in the discharge side end member, and discharges the ejection fluid from the ejection fluid storage chamber. An ejection system unit for a fluid ejection device, comprising a one-way valve that opens only when discharging is performed.

In the present invention, the ejection system unit is roughly composed of a cylindrical elastic member, a suction-side end member, and a discharge-side end member. The ejection fluid storage chamber is a space closed by these members. Has been built. In other words, the opening portions at both ends of the cylindrical elastic member are provided so as to be covered by the suction-side end member and the discharge-side end member, respectively, and the internal space is used as the ejection fluid storage chamber. Therefore, for example, by using a tubular elastic member and creating each end member that covers both ends thereof, it is possible to construct an ejection system unit with a simple configuration.

The ejection fluid suction section is disposed in the suction side end member, and is connected to an external ejection fluid supply source therethrough. Further, a one-way valve (or a check valve) that opens only when the ejection fluid flows into the ejection fluid storage chamber is provided in the suction side end member. For this reason, when the pressure of the ejected fluid storage chamber is reduced, the one-way valve is opened to allow the fluid to flow into the inside from the ejected fluid supply source. On the other hand, the valve is closed to prevent the liquid from flowing out from the inside.

The ejected fluid discharge section is disposed in the discharge side end member, and is connected to an ejection section such as an external nozzle through this section. Further, a one-way valve (or a check valve) that is opened only when the ejection fluid is discharged from the ejection fluid storage chamber is provided in the discharge-side end member. For this reason, when the ejected fluid storage chamber is pressurized, the one valve is opened and the fluid is discharged from the inside to the ejection section. Conversely, when the ejected fluid storage chamber is depressurized, the one valve is opened. Is closed to suppress the inflow (or backflow) of the liquid into the inside.

The invention described in claim 3 of the present application shows one of the preferable embodiments of the above-mentioned ejection system unit. That is, the present invention is an independent ejection system unit used in a fluid ejection device that sucks and ejects ejection fluid into an ejection fluid storage chamber by the action of pressure transmitted from the outside, and constitutes a flow path of the ejection fluid. Among the members to be ejected, an ejection fluid storage chamber for storing at least the ejection fluid, an ejection fluid suction unit having an inflow port for allowing the ejection fluid to flow into the ejection fluid storage chamber, and An ejection fluid discharge unit having an ejection port for ejecting ejection fluid; and a support member disposed in a direction of a symmetric axis of the cylindrical outer shape inside the ejection system unit; The chamber is constituted by a space closed by a cylindrical elastic member capable of transmitting pressure by a fluid, and a suction-side end member and a discharge-side end member respectively covering both ends of the cylindrical elastic member. , The ejected fluid suction A part disposed in the suction-side end member, and provided with a one-way valve that is opened only when the ejection fluid flows into the ejection-fluid storage chamber, and the ejection-fluid discharge part is provided in the discharge-side end member. And a one-way valve which is opened only when the ejection fluid is ejected from the ejection fluid storage chamber, wherein the support member moves relative to at least one of the end members in the axial direction. An ejection system unit used in a fluid ejection device, which is held in a possible state, is provided.

According to the present invention, since the side surface of the ejection system unit is formed of a cylindrical elastic member forming a part of the ejection fluid storage chamber, a column member is further provided to maintain the rigidity of the unit. . In other words, end members are provided at both ends of the ejected fluid storage chamber constituted by the space surrounded by the side outer wall portion made of the elastic member, but the inside other than the end member has the rigidity of only the elastic member. Since the unit itself is held, a structure for complementing the rigidity of the ejection system unit is provided by providing a support member.

The strut member is disposed at the symmetrical axis position of the cylindrical elastic member, and is held so as to be relatively movable in the axial direction with respect to at least one of the end members. Therefore, the rigidity is maintained with respect to the bending in the axial direction, and the deformation in the axial direction is allowed by the relative movement in the axial direction with respect to the end member.

Accordingly, when the unit is handled as a single unit, the support member and the end member do not bend as a whole due to the support member, even if the cylindrical elastic member is elastically deformed and the axial length changes during use. Are relatively moved in the axial direction, so that the entire unit can be deformed.

Since the strut member is disposed at the symmetrical axis position of the cylindrical elastic member (the axial center position inside the jetted fluid storage chamber), the jetted fluid storage chamber itself is distorted or deformed. Is prevented from becoming uneven. In addition, since there is no member outside, there is also an advantage that the pressure transmission structure from outside the unit is simplified.

Since the strut member is disposed in a space surrounded by the cylindrical elastic member, the degree of elastic deformation of the elastic member due to pressure transmission from the outside of the unit is returned to the original state of the elastic member. It is possible to limit the elastic recovery force within the range that causes the elastic recovery force. That is, the elastic member is elastically deformed in accordance with the magnitude of the pressing force from the outside of the unit. If the pressing force is too large, the elastic member may be excessively elastically deformed and the elastic recovery force may not be generated. is there.
However, since the strut member is disposed in the space surrounded by the cylindrical elastic member, no elastic deformation occurs inside the position where the strut member is arranged. For this reason, the elastic deformation of the elastic member is limited by the support member, and the degree of deformation can be maintained within a range where the elastic recovery force of the elastic member is sufficiently obtained.

According to the invention described in claim 4 of the present application , claim 3
In the ejection system unit according to the above, each of the end members, each end member provided with a suction port or a discharge port of the ejection fluid, and an external collar member that covers at least a part of an outer peripheral portion of the end member. , Wherein the end portion of the cylindrical elastic member is sandwiched and held between the end member and the external collar portion.

In the present invention, the suction-side end member is roughly divided into a suction-side end member and a suction-side external collar member, and the discharge-side end member is formed by the discharge-side end member and the discharge-side external collar member. It is configured. The suction-side end member has a discharge port of a jet fluid connected to a supply source of the outflow fluid, and the discharge-side end member has a discharge port of the jet fluid connected to a jet portion such as a nozzle.

These end members are provided with a flow path so as to communicate with the inside of the cylindrical elastic member, and each external collar member is configured to cover the outside of the end member. The end of the cylindrical elastic member is sandwiched between the end member of each end member and the collar member, and each end member is connected to both ends of the cylindrical elastic member. An ejection fluid storage chamber is configured.

For this reason, when constructing the ejection system unit according to the present invention, a cylindrical elastic member and each end member are prepared, and both ends are connected to the end member of the end member and the external collar member. It can be manufactured by sandwiching it between.

The space between the end member and the outer collar member is sealed by the end of the elastic member sandwiched between them, and only the end of each end member appears in the ejection fluid storage chamber. What is necessary is just to provide a flow path communicating with the suction port (or the discharge port).

Thus, the suction port, the inside of the cylindrical elastic member, and the discharge port communicate with each other, and the ejected fluid storage chamber formed by each end member and the cylindrical elastic member is connected to the outside. (Except for the flow path).

Further, since the support member disposed in the space surrounded by the cylindrical elastic member does not cause excessive elastic deformation of the elastic member, the ejected fluid is generated by unnecessary expansion and contraction of the elastic member repeatedly. There is an advantage that disconnection between each end member at each end of the storage chamber and the elastic member can be prevented, and the life of the ejection system unit can be maintained long.

Next, according to another aspect of the present invention, in the ejection system unit according to the invention described above, the end member of the suction-side end member has a suction port that communicates in the axial direction toward the suction port of the ejection fluid. An ejection system unit having a communication hole, wherein one end of the support member is inserted into the suction communication hole so as to be relatively movable in the axial direction.

In the present invention, the suction side end member is provided with a holding structure for holding the column, and the suction side end member facing the storage chamber is provided with a suction side holding hole extending in the axial direction. The configuration is not particularly limited as long as it is a structure in which the distal end of the support member on the suction side is inserted and held in a state in which it can be relatively moved in the axial direction with respect to the holding hole.

In the present invention, the suction communication hole communicating in the axial direction toward the suction port of the ejected fluid also serves as the holding hole on the suction side of the support structure, and the member structure is simplified. Have been.

The support member only needs to hold the distal end on the suction side in the suction communication hole (holding hole) in a so-called loose fit state, and relative movement in the axial direction is allowed. Deformation in the direction is allowed by this relative movement.

Further, the bending of the entire unit in the axial direction is limited to a range in which the deformation (relative movement) of the distal end portion of the suction side support and the suction side holding hole in the bending direction is allowed. Has a structure that complements the rigidity against bending.

In another aspect of the present invention, in the ejection system unit according to the invention described above, the support member has a suction-side support communication hole for communicating the suction communication hole and the ejection fluid storage chamber. The present invention provides an ejection system unit characterized in that:

In the ejection system unit according to the present invention, one end of the support member is connected to the suction communication hole of the suction side end member.
Since it is inserted, in order to secure a flow path between the suction port and the ejection fluid storage chamber, the support member is provided with a suction side support communication hole.

It is preferable that the suction side column communication hole is provided so as to penetrate through the inside of the column from the one end (the suction side end) of the column member. The external shape of the suction-side distal end portion is configured to be substantially equal to the inner shape of the suction communication hole of the suction-side end member in order to maintain the rigidity of the entire unit. In other words, the suction-side distal end portion of the support member sucks outward without a gap. Since it is preferable that the side end member is configured to be fitted into the suction communication hole, a sufficient flow path is ensured by adopting a structure in which the inside of the column is inserted.

However, for example, the flow path formed between the groove structure provided outside the front end portion of the suction side of the support and the side wall of the suction communication hole of the suction side end member may be used as the suction side support communication hole. Good.

According to another aspect of the present invention, in the ejection system unit according to the invention described above, the suction communication hole of the suction-side end member has a first valve seat hole downstream of the ejection fluid. The one-side valve on the suction side has a first check valve body seated on the valve seat hole from the downstream side of the ejected fluid, and one end of the support member inserted into the suction communication hole A part is provided for restricting the movement of the ejection fluid in the downstream direction of the first check valve body, the ejection system unit being provided.

In the present invention, the one-side valve on the suction side is provided inside the end member, and the first (suction side) valve seat hole is provided in the suction communication hole which is a flow path inside the end member. Here, the first (suction side) check valve body is disposed here, and the movement of the suction side check valve body in the downstream direction is restricted by the suction side tip of the support member.

In other words, the check valve body is disposed inside the suction communication hole and upstream of the front end of the support member inserted therein on the suction side. With these components, a one-side valve on the suction side is constructed. I have.

[0096] For this reason, the members other than the check valve body can be used for the one-side valve on the suction side, so that the one-way valve can be constructed with a simple configuration and the number of constituent members is reduced, so that the manufacturing cost is reduced. It is also possible to plan.

Next, according to another aspect of the present invention, in the ejection system unit according to the invention described above, the discharge member has an end communication member in which the end member of the discharge side end member communicates in the axial direction toward the ejection port of the ejection fluid. An ejection system unit having a hole, wherein the other end of the support member is inserted into the discharge communication hole so as to be relatively movable in the axial direction.

According to the present invention, the discharge-side end member has a holding structure for holding the column member, and a holding hole that faces in the axial direction is provided in a portion of the discharge-side end member that faces the storage chamber. The configuration thereof is not particularly limited as long as the other end portion (discharge-side end portion) of the support member is inserted and held so as to be relatively movable in the axial direction.

In the present invention, the discharge communication hole communicating in the axial direction toward the ejection port of the ejected fluid is configured to also serve as the holding hole of the column holding structure, and the member structure is simplified. .

The support member only needs to hold its distal end on the discharge side in the communication hole (holding hole) in a so-called loose fit state, and relative movement in the axial direction is allowed. Is allowed by this relative movement.

Further, the bending of the entire unit in the axial direction is limited to a range in which the deformation (relative movement) of the tip of the discharge-side column and the holding hole of the discharge-side in the bending direction is permitted. The strut member has a structure that complements the rigidity against bending.

According to another aspect of the present invention, in the ejection system unit according to the invention described above, the support member has a discharge-side support communication hole for communicating the discharge communication hole with the ejection fluid storage chamber. The present invention provides an ejection system unit characterized in that:

In the ejection system unit according to the present invention, since one end of the support member is inserted into the discharge communication hole of the discharge end member, it is necessary to secure a flow path between the discharge port and the ejection fluid storage chamber. A discharge-side column communication hole is provided in the column member.

It is preferable that the discharge-side column communication hole is provided so as to extend from the other end (the discharge-side distal end) of the column member to the inside of the column member. The outer shape of the tip on the discharge side is
In order to maintain the rigidity of the whole unit, it should be configured to be substantially equal to the inner shape of the discharge communication hole of the discharge end member. This is because it is preferable to have a structure that fits inside the column, so that a sufficient flow path is ensured.

For example, when the one-side valve on the discharge side is provided downstream of the discharge-side distal end of the support member, a groove structure provided outside the discharge-side distal end of the support member, The flow path formed between the member and the side wall of the discharge communication hole may be a discharge-side column communication hole.

According to another aspect of the present invention, in the ejection system unit according to the invention described above, the discharge communication hole of the discharge-side end member is formed by inserting the other end of the support member into the discharge communication hole. It is configured to be closed, the discharge-side column communication hole of the column member is provided with a second valve seat hole on the downstream side of the ejected fluid, and the one-side valve of the discharge-side end member includes the second valve seat hole. A second chuck valve body seated on the second valve seat hole from the downstream side of the ejection fluid, and an abutment for restricting a movement of the second check valve body in a downstream direction of the ejection fluid. A jet system unit characterized by including means is provided.

In the ejection system unit according to the present invention, the discharge communication hole of the discharge-side end member is closed by the discharge-side distal end portion of the support member, and only the discharge-side support communication hole provided inside the support member is flow-passed. And That is, the inner surface of the discharge communication hole,
Each of the support members is formed to have substantially the same size and shape as the outer surface of the discharge-side tip portion of the support member.
The structure is such that fluid does not flow through a seal member such as a ring.

The discharge-side one-way valve (check valve) is formed by utilizing the discharge-side column communication hole. That is, the discharge-side column communication hole, which is a flow path communicating from the ejection fluid storage chamber to the discharge communication hole, is provided on the downstream side of the ejection fluid in the second (discharge side).
A second (discharge-side) check valve body is provided therein, and abutment means for restricting the movement of the ejected fluid of the second check valve body in the downstream direction is provided. ing.

In other words, the second check valve element is disposed inside the discharge-side column communication hole and upstream of the discharge-side tip of the column member, and abutment means is provided downstream of the column member. Have been.

Here, the configuration of the abutment means is not particularly limited as long as it limits the movement of the ejected fluid of the second check valve body in the downstream direction. But,
It is preferable to provide it inside the discharge communication hole of the discharge side end member.

This is because the second check valve element is inserted into the discharge-side column communication hole from the discharge-side distal end portion of the support member and seats, so that the second check valve element is inserted into the discharge-side column communication hole. This is because the structure becomes complicated when constructed on the downstream side. Also, it is relatively easy to construct a structure in the discharge communication hole that restricts the movement of the second check valve in the downstream direction (toward the discharge port). For example, it is conceivable to configure an end face portion or the like provided on the downstream side of the discharge-side tip portion of the support member inside the discharge communication hole.

As described above, since each member other than the check valve body can be used for the one-side valve on the discharge side, the one-side valve can be constructed with a simple configuration, and the number of constituent members is reduced. It is also possible to achieve reduction.

Next, relatively preferred embodiments of the jet system unit according to the present invention are as follows, and the operation and effect of each component are the same as those described above. That is, the claims of the present application
In the invention described in 5 , the independent ejection system unit used in the fluid ejection device that sucks and ejects the ejection fluid by the action of the pressure transmitted from the outside to the ejection fluid storage chamber, and is capable of transmitting pressure by the fluid. A cylindrical elastic member,
A suction-side end member that covers one of the openings at both ends of the cylindrical elastic member and has an inflow port for inflow of the ejection fluid,
A discharge-side end member that covers one of the openings at both ends of the cylindrical elastic member and has a discharge port for discharging a fluid for ejection,
A strut member disposed at a symmetric axis position of the cylindrical elastic member, a one-way valve that is opened only when the ejection fluid flows into the ejection fluid storage chamber, and discharges the ejection fluid from the ejection fluid storage chamber. And a one-way valve that opens only when the end member covers the end member provided with the suction port or the discharge port and at least a part of the outer peripheral portion of the end member. Each of which has an external collar member, and holds and holds an end of the cylindrical elastic member between the end member and the external collar portion. The cylindrical elastic member and a suction-side end member A discharge fluid storage chamber for storing the discharge fluid is constituted by a space closed by the discharge-side end member and the discharge-side end member. The end member of the suction-side end member has a suction port that communicates with a discharge port of the discharge fluid. Having a communication hole, the discharge side end End member of wood has a discharge passage communicating with the discharge port of the jet fluid, said strut members,
Both ends are inserted into the suction communication hole and the discharge communication hole, respectively, and are held so as to be movable in the axial direction, and a suction-side column for communicating the ejection fluid storage chamber with the suction communication hole. A communication hole, and a discharge-side column communication hole that communicates the ejection fluid storage chamber with the discharge communication hole, from outside through a cylindrical elastic member that forms an outer wall of the ejection fluid storage chamber. An ejection system unit of a fluid ejection device, wherein pressure is transmitted, and the ejection fluid is sucked / discharged by the elastic force of the elastic member or the action of the transmission pressure.

The one-way valve described above can employ a well-known check valve configuration, and is not particularly limited. For example, as the valve seat hole, any one using the end face of the communication hole, one using the inner surface taper part, or the like may be used. Further, the check valve body may use a ball-shaped check ball, a cylindrical flat valve, or the like. Further, a so-called in-line type or an angle type may be used, but the latter has a drawback in that the configuration is complicated.

Next, as a preferred embodiment of the present invention, an ejection system unit provided with an in-line one-way valve using a check ball will be described below. That is, in the invention described in claim 6 of the present application, in the ejection system unit of the fluid ejection device according to claim 5 , the suction communication hole of the suction-side end member has a tapered portion that expands toward the downstream side of the ejection fluid. A first valve seat hole portion, and the one-side valve on the suction side has a ball-shaped first check valve body seated on the valve seat hole portion from the downstream side of the ejected fluid, One end of the strut member inserted into the suction-side communication hole limits movement of the first check valve body in the downstream direction of the ejected fluid, and discharges the discharge-side end member. The communication hole is configured such that the other end of the support member is inserted and the discharge communication hole is closed, and the discharge-side support communication hole of the support member moves toward the downstream side of the ejected fluid. Equipped with a second valve seat hole consisting of an expanding taper The one-side valve of the discharge-side end member has a ball-shaped second check valve body that is seated in the second valve seat from the downstream side of the ejected fluid, and the discharge-side end member has The ejection communication unit of the fluid ejection device, characterized in that the ejection communication unit includes, in the discharge communication hole, an abutting means including an end face portion that restricts movement of the ejection fluid in the downstream direction of the second check valve body. provide.

In the ejection system unit according to the present invention, each one-way valve is constituted by an inner surface portion of a tapered communication hole and a check ball provided therein, and the movement of the check ball in the downstream direction is restricted. As the abutting means, the suction-side one-valve uses the suction-side tip portion of the support member, and the discharge-side one-valve uses an end face provided in the discharge communication hole.

In the present invention, the one-side valve on the suction side is provided with the first (suction-side) valve seat hole by the tapered portion provided in the suction communication hole of the suction-side end member. (Suction side) A check valve body composed of a check ball is provided, and the downstream end of the suction side check valve body is restricted by the suction side tip of the support member.

For this reason, the one-way valve on the suction side can be manufactured by inserting the first check ball into the suction communication hole and further inserting the tip of the support member on the suction side from the downstream side. The structure of the member is simplified, and its production can be easily performed.

On the other hand, the discharge communication hole of the discharge side end member is
The structure is closed at the discharge-side end of the support member, and only the discharge-side support communication hole provided inside the support member is used as a flow path. That is, between the inner surface of the discharge communication hole and the outer surface of the discharge-side distal end portion of the support member, each is formed to have substantially the same size and shape, and if necessary, via a seal member such as an O-ring. The structure is such that the fluid does not flow.

A discharge-side one-way valve (check valve) is formed by using the discharge-side column communication hole. That is, the discharge-side strut communication hole, which is a flow path communicating from the ejection fluid storage chamber to the discharge communication hole, has a second (discharge-side) valve seat hole formed of a tapered portion downstream of the ejection fluid. And a ball-shaped second (discharge-side) check valve element, and an abutting means comprising an end face portion provided inside the discharge communication hole of the discharge-side end member.

In other words, the second check ball is disposed inside the discharge-side column communication hole, upstream of the discharge-side tip of the support member, and inside the discharge communication hole at the downstream portion. An end face portion is provided as abutment means. The end face portion is constituted by, for example, an end face of a step portion having a different hole diameter inside the discharge communication hole.

As described above, the discharge-side one-way valve according to the present invention is configured such that the check ball is inserted into the discharge-side post communication hole of the support member or the discharge-end hole of the discharge end member. It can be manufactured by inserting the side tip into the discharge communication hole of the discharge side end member, so that a one-way valve can be constructed with a simple configuration and the number of constituent members is reduced, so that manufacturing costs can be reduced. is there.

According to another aspect of the present invention, in the ejection system unit according to the above aspect, at least one of the end member and the external collar member is provided at a portion for holding and holding an end of the cylindrical elastic member. An ejection system unit provided with a protruding portion directed to the other side is provided.

According to the present invention, the elastic member holding portion of the end member for holding the end portion of the cylindrical elastic member is provided with a protruding portion to make the holding more firm. That is, at least a portion of the elastic member holding portion (the portion sandwiching the elastic member between the end member and the external collar member) is provided with a protruding portion, and the relative distance between the end member and the external collar member is narrow at that portion. As a result, the elastic member is elastically deformed more strongly and is held firmly.

The projecting portion may be provided on the end member side or the external collar member side as long as it has a structure for reinforcing the sandwiching. However, at the time of production, the end portion of the cylindrical elastic member is put on the holding portion of the end member, and the external collar portion is put on the end portion. Therefore, it is preferable to provide the end portion on the end member side in consideration of workability. In addition, since the end member is often formed of a resin or the like which is easy to be processed because of constituting a flow path or the like, it is preferable to provide the end member on the end member also from the viewpoint of easy processability of the protruding portion and the like.

Further, since the opening of the cylindrical elastic member is sealed, in order to improve the sealing performance and avoid problems such as pressure concentration, the projecting portion should be provided over the entire circumference in the circumferential direction. Is preferred.

According to still another aspect of the present invention, in the ejection system unit according to the above invention, the end member of the suction-side end member and the external collar member have a portion for holding the end of the cylindrical elastic member. And a jetting system unit characterized in that each jetting unit is formed in a tapered shape expanding toward the inflow direction of the jetting fluid.

According to the present invention, since the elastic member holding portion is formed in a tapered shape toward the downstream side of the flow path, the holding state of the cylindrical elastic member on the suction side at the time of pressurization is complemented. I have.

That is, the flow path to the suction port is closed at the time of pressurization, but pressure is applied to the suction side end member in the direction from the inside to the outside (in the upstream direction). At this time, since the elastic member holding portion is formed in a tapered shape, when the end member attempts to move in the upstream direction, the relative distance between the elastic member holding portion and the outside or the collar portion becomes narrow.

In other words, (the storage chamber side of the end member)
Is applied to the clamping force of the cylindrical member to reinforce it, so that the suction side seal structure at the time of pressurization is complemented, and the pressure transmission to the discharge side is reduced. Performed efficiently.

[0131]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings. Here, an example in which the pressure converter and the ejection unit according to the invention of the present application are applied to a water jet knife will be described.

FIG. 1 and FIG. 2 are schematic sectional views of a pressure converter and an ejection system unit according to an embodiment of the present invention. In FIG. 1, a pressure converter 1 is a member constituting a part of a jet knife as a fluid ejection device, and FIG.
2 shows a state in which the ejection system unit 50 shown in FIG.

The pressure converter 1 has a driving fluid storage chamber 3 formed by a space between a cylindrical rubber tube 4 as an elastic member and an outer shell container 2.
a and the lower seal member 7b hermetically seal the upper and lower portions. Further, a jet system unit 5 is provided above the outer shell container 2.
There is provided a split presser plate 5 and a presser 6 for the split presser plate.

As is apparent from FIG. 2, the ejection system unit 50 has a cylindrical silicon tube 5 as an elastic member.
1, a discharge-side end member 54 and a discharge-side external collar 57 constituting a discharge-side end member 60 provided at the upper end thereof.
And a suction-side end member 53 and a suction-side external collar 56, which constitute a suction-side end member 62 provided at the lower end, and the ejection fluid storage chamber 52 is formed in a closed space by these. ing.

The ejection system unit 50 has a substantially cylindrical outer shape, and its side surface, except for the end members, has a cylindrical silicon outer wall portion of the ejection fluid storage chamber 52. It is constituted by a tube 51.

Further, inside the ejection fluid storage chamber 52,
A strut 55 as a strut member is provided, and a first check ball 58 constituting a suction-side one-way valve is provided at both ends thereof.
a and a second check ball 58 constituting a discharge-side one-way valve
b are provided.

Since the outer casing 2 and the rubber tube 4 of the pressure converter 1 are each formed in a cylindrical shape and arranged at concentric positions, the driving fluid storage chamber 3 has a hollow cylindrical shape, and the ejection system The pressure converter 1 is provided inside the main body of the pressure converter 1 so as to be isolated from the ejection fluid storage chamber 52 of the unit 50. The inner wall (side wall) of the hollow portion is formed of a rubber tube 4 which is an elastic member, and serves as a pressure transmitting portion of the driving fluid storage chamber 3.

An upper seal member 7a and a lower seal member 7b are provided on the upper and lower surfaces of the hollow cylindrical driving fluid storage chamber 3, respectively, and each seals both ends of the rubber tube 4. It is configured to hold and close the space between the outer shell container 2 and the container. Accordingly, the driving fluid storage chamber 3 is sealed by these members.

The hollow portion of the upper seal member 7a is provided with an insertion hole substantially equal to (slightly larger than) the outer shape of the ejection system unit 50, and this insertion hole is used for inserting and removing the ejection system unit 50 from the main body. Are formed. The upper seal member 7a is provided between the O-ring 7 and the outer shell container 2.
c with the bolts 8a and 8b interposed therebetween.
It is fixed to.

The lower seal member 7b is provided with a suction-side connection hole formed of a through hole smaller than the outer shape of the ejection system unit 50, from which the tip of the ejection fluid suction portion of the ejection system unit (the tip of the suction port) is formed. Are projected outside. This is for connecting a pipe or the like from the ejection fluid supply source to the ejection system unit via the suction side connection hole. The lower seal member 7b is fixed to the outer shell container 2 with bolts 8c and 8d and the like with an O-ring 7d interposed between the lower seal member 7b and the outer shell container 2.

The split presser plate 5 has a general shape in which a so-called donut-shaped annular member is split into two, and is attached to the outer shell container 2 integrally with the attachment member 11 and the bolt 9. I have. One end of each member of the split presser plate 5 has a bolt 10 with respect to an axial direction (a direction parallel to the paper surface).
, And can be opened and closed about the bolt 10 in the vertical direction of the drawing.

When the split presser plate 5 is in the closed state, the size of the annular hollow portion is smaller than that of the ejection system unit 50, and the through hole at the center of the annular shape is connected to the discharge side. It becomes a hole. Then, the tip of the ejection fluid ejection part (the tip of the ejection port) of the ejection system unit projects outward from here. This is for connecting a pipe or the like from the ejection system unit to a nozzle or the like serving as an ejection portion via the ejection side connection hole.

Accordingly, in this embodiment, the split presser plate 5, the presser fitting 6, the hollow portion (insertion hole) of the upper seal member 7a, the hollow portion of the pressure converter 1, and the suction side connection hole (the lower end of the lower seal member 7b). And the like, and holding means for the ejection system unit.

By opening the split presser plate 5, the hollow portion (insertion hole) of the upper seal member 7a is opened, and the ejection system unit 50 is taken out from the pressure converter 1 or inserted into the pressure converter 1. You can wear it. The ejection system unit 50 inserted into the pressure converter 1 is held in contact with the upper surface of the suction side connection hole of the lower seal member 7b except for the center of the lower surface. When the split mold holding plate 5 is closed, a fixed state is held by a holding metal fitting 6 attached to the outside of the outer shell container 2 so as not to be opened.

In this embodiment, when the ejection system unit 50 is inserted, the ejection system unit 50 is positioned concentrically in a hollow portion provided at the axial center portion of the pressure converter 1, and the ejection fluid storage chamber is provided. The silicon tube 51 forming the outer wall of the second member 52 and the rubber tube 4 forming the side wall (inner wall) of the hollow portion of the driving fluid storage chamber 3 are opposed to each other.

In other words, the driving fluid storage chamber 3 of the pressure converter 1 is connected to the ejection fluid storage chamber 5 of the ejection system unit 50.
2 and a rubber tube 4 and a silicon tube 51 that constitute the outer walls of the two.

Incidentally, as shown in FIG.
A slight gap is formed between 0 and the pressure converter 1 (between the rubber tube 4 and the silicon tube 51). This is to prevent the elastic members from being in contact with each other when the ejection system unit 50 is inserted into and removed from the pressure converter 1, thereby preventing the attachment / detachment operation from becoming complicated.

Further, since the silicon tube 51 of the ejection system unit 50 is sandwiched from the outside by the external collar portion of the end member, the outermost diameter of the ejection system unit 50 (the thickness of the end member) Outer diameter), but its thickness (interval between the sheer) is very small.

When actually used as a fluid jetting device, the driving fluid storage chamber 3 is filled with a driving fluid and pressurized, so that the rubber tube 4 constituting the side wall (inner wall) of the hollow portion faces inward. By inflating the rubber tube 4 and the silicon tube 51 so as to be adjacent to each other (closely contact), the rubber tube 4 becomes a double partition separating the storage chambers from each other, and pressure can be transmitted through the close contact portion.

The rubber tube 4 and the silicon tube 51 are capable of expanding and contracting in a cylindrical diametric direction, and are not limited to these as long as they are elastic members capable of transmitting pressure by a fluid at least. Instead, the thickness, size, and the like are determined in relation to the output of the device.

A driving fluid is supplied into the driving fluid storage chamber 3 through a communication hole 2 a provided in the outer shell container 2. The driving fluid is supplied with an oscillating pressure by an external pressurizing device described later. The rubber tube 4 is elastically deformed (vibrated) by repeatedly expanding and contracting in the axial direction of the pressure converter 1.

When used as a jet knife, for example, hydraulic oil (silicon oil, liquid paraffin, etc.) is used as the driving fluid.

Next, the ejection system unit 50 in this embodiment will be described with reference to FIGS. As described above, the ejection system unit 50 includes the silicon tube 5.
1, a discharge side end member 60, a suction side end member 62, a support 55, and the like.

The silicon tube 51 has a cylindrical shape, and a column 55 is disposed at the axial center of the cylindrical silicon tube 51. Both ends of the silicon tube 51 are connected to the discharge side end member 60 and the suction side end member 62. , And the internal space forms the ejection fluid storage chamber 52. That is, the ejection fluid storage chamber 52 has a substantially columnar shape having a support column 55 at the center, and the outer side wall portion is constituted by the silicon tube 51 which is an elastic member.

The discharge-side end (upper side in the figure) of the silicon tube 51 is connected to the discharge-side end member 54 and the discharge-side external collar 5.
7 and held between the ends in the upstream direction. In this discharge side holding portion, the discharge side end member 54
A peripheral projection 54a is formed on the outer surface of the silicon tube 51 so as to protrude outward (toward the discharge-side external collar 57) continuously in the circumferential direction, and holds the discharge-side end of the silicon tube 51 and seals this portion. The character is strong.

The suction-side end (the lower part in the figure) of the silicon tube 51 is connected to the suction-side end member 53 and the suction-side external collar 5.
6 and is held between the downstream ends thereof. In the suction side holding portion, the suction side end member 53
A peripheral projection 53a is formed on the outer surface of the silicon tube 51 so as to protrude outward (toward the suction-side external collar 56) continuously in the circumferential direction. The character is strong.

Further, as is apparent from the drawing, in the holding portion on the suction side, each of the suction-side end member 53 and the suction-side external collar 56 has a tapered shape expanding in the downstream direction (upward in the figure). Is configured. This is for further strengthening the holding force and the airtightness in the inflow-side holding portion when the inside of the ejection fluid storage chamber 52 is pressurized.

That is, when the inside of the ejection fluid storage chamber 52 is pressurized, the pressure acts in the direction of pushing down the suction side end member 53 to the upstream side (downward in the drawing).
The force is applied in a direction in which the relative distance between the tapered holding portion 6 and the tapered holding portion 68 of the suction side end member 53 and the tapered holding portion 66 of the suction side external collar 56 becomes smaller. For this reason, the clamping force of the suction side end of the silicon tube 51 is increased, and the backflow to the suction side and the outflow to the outside are strongly prevented.

The suction side end member 5 of the suction side end member 62
3 is provided with a suction side communication hole 63 continuously provided from a suction port connected to a supply source of the ejection fluid to a downstream end portion facing the ejection fluid storage chamber 52, and this is a suction side communication hole. Of this flow path.

At the downstream end of the suction-side communication hole 63, a communication hole 63 into which the suction-side (upstream-side) tip of the column 55 is inserted.
a is provided, and the hole diameter of this portion is the largest among the communication holes 63, and is configured to be substantially equal to the outer diameter of the column 55. For this reason, when the suction-side distal end of the column 55 is inserted into the communication hole 63a, the column 55 is held so as to be mutually movable in the axial direction.

FIG. 3 shows a state in which the suction-side distal end of the support column 55 is inserted into the communication hole 63a as far as possible. However, in practice, there is a gap such that the suction-side distal end does not come off the communication hole 63a. Occurs in the direction. Therefore, when the ejection system unit is deformed and contracts in the axial direction, the deformation in the axial direction is allowed by the clearance. Further, bending in the axial direction is allowed within a range in which the side surfaces of the insertion portion are inclined in a state where they are in contact with each other.

A suction-side column communication hole 55a for communicating the suction-side communication hole 63 with the ejection fluid storage chamber 52 is provided at the suction-side tip portion of the support 55, and constitutes a part of the flow path of the ejection fluid. are doing.

As shown in FIG. 3, the inlet on the upstream side of the suction-side column communication hole 55a is provided at the end face and side surface of the suction-side tip of the column 55. The inflow port forming portion is provided at the end of the support 55 on the suction side.
The outer diameter is slightly smaller than the outer diameter of the inlet port, and a gap is formed between the side surface of the inflow port forming portion and the inner wall of the suction side communication hole 63 (portion 63a or 63b).

This is because the inflow port provided at the suction-side end face of the support 55 may be closed when a check ball described later abuts during suction, and in order to secure a sufficient flow path during suction. In addition, such an inflow port forming portion is provided at the tip of the support column 55 on the suction side.

The discharge port of the suction-side column communication hole 55a into the ejection fluid storage chamber 52 is inserted into the ejection fluid storage chamber 52 with the suction-side tip of the column 55 inserted deepest into the suction-side communication hole 63. What is necessary is just to arrange in the position which opens. In this embodiment, with respect to the hole toward the axial direction from the distal end of the strut 55 at a predetermined depth (55a _1), communicates them by providing a hole (55a ₂₎ toward the radial direction from the side of the column 55 , And a suction-side column communication hole 55a.

Inside the suction-side communication hole 63, a first valve seat hole directed toward the downstream direction of the fluid is provided on the upstream side of the suction-side tip surface of the support column 55. In this embodiment, a first valve seat hole is formed by the tapered portion 63c that expands in the downstream direction. A check ball 58a having an outer diameter larger than the minimum meridian and smaller than the maximum meridian of the tapered portion 63c is provided as a check valve body on the suction side. The check ball 58a is restricted from moving downstream by the abutting end surface of the support column 55 serving as an abutting means.

Therefore, when the pressure of the ejection fluid storage chamber 52 is reduced, the check ball 58a moves downstream from the tapered portion 63c, which is the first valve seat hole, and the suction side communication hole 63 is moved to the (first) position. The valve seat hole is opened. Then, the suction-side communication hole 63 of the suction-side end member communicates with the suction-side column communication hole 55 a of the column 55, and the ejection fluid is sucked into the ejection fluid storage chamber 52.

At this time, the movement of the check ball 58a is restricted by contacting the front end surface of the support column 55 on the suction side, and the check ball 58a does not move into the ejection fluid storage chamber 52.
Is held inside. If the inlet on the suction-side tip surface of the support column 55 is circular, the check ball 58a
In this case, as described above, the fluid is guided from the inflow port on the side surface of the inflow port forming portion to the suction-side column communication hole 55 a of the column 55.

Conversely, when the jetted fluid storage chamber 52 is pressurized, the check ball 58a is pressed against the tapered portion 63c, which is the first valve seat hole, and the suction side communication hole 63 is set to the (first valve). The seat hole is closed) to prevent backflow of the ejection fluid into the inlet.

As described above, the suction-side one-side valve (check valve) constituted by these members is provided inside the suction-side end member 53 of the ejection system unit 50. It mainly includes a check ball 58 a, a suction-side tip surface of the support column 55, and a tapered portion 63 c of the suction-side communication hole 63. That is, an efficient one-way valve can be constructed with a small number of members.

Next, the discharge side end member 54 of the discharge side end member 60 is continuously connected from a discharge port connected to a nozzle or the like serving as a jetting portion of jetting fluid to an upstream end facing the jetting fluid storage chamber 52. And a discharge-side communication hole 61 is provided, which constitutes a part of the flow path of the ejection-side ejected fluid.

At the upstream end of the discharge-side communication hole 61, a communication hole (insertion hole) 61a into which the discharge-side (downstream side) tip of the column 55 is inserted is provided. It is the largest among the side communication holes 63, and is configured to be substantially equal to the outer diameter of the column 55. Therefore, the support 55
In the state where the discharge-side distal end portion is inserted into the communication hole (insertion hole) 61a, it is held in a state where it can move in the axial direction.

FIG. 3 shows a state in which the discharge-side distal end of the column 55 is inserted into the communication hole (insertion hole) 61a as far as it will go. However, in actuality, the discharge-side distal end has the communication hole (insertion hole) 61a.
Clearance occurs in the axial direction to such an extent that it does not come off. Therefore, when the ejection system unit is deformed and contracts in the axial direction, the deformation in the axial direction is allowed by the clearance. Further, bending in the axial direction is allowed within a range in which the side surfaces of the insertion portion are inclined in a state where they are in contact with each other.

[0174] An O-ring 65 is interposed between the discharge-side distal end of the column 55 and the discharge communication hole (insertion hole) 61a, and blocks the flow of fluid therebetween. In other words, the discharge communication hole (insertion hole) 61a is closed except for a discharge-side column communication hole 55b described later when the discharge-side distal end of the column 55 is inserted.

A discharge-side column communication hole 55b for communicating the suction-side communication hole 63 and the ejection fluid storage chamber 52 is provided at the discharge-side tip of the column 55, and constitutes a part of the flow path of the ejection fluid. are doing. Therefore, the ejection fluid in the ejection fluid storage chamber 52 is guided to the downstream side of the discharge communication hole (insertion hole) 61a through only the discharge-side column communication hole 55b.

As is apparent from FIG. 3, the discharge-side column communication hole 55b has an opening on the downstream side of the discharge-side column communication hole 55b provided in the downstream end face of the column 55, and extends in the axial direction from here. A hole (55b ₁ ) is provided along with the hole (55b ₂ ) provided in the radial direction from a discharge-side inflow port provided in a side surface portion of the support column 55 appearing inside the ejection fluid storage chamber 52. It is constituted like this.

It should be noted that the inflow port from the ejection fluid storage chamber 52 of the discharge column communication hole 55b enters the ejection fluid storage chamber 52 in a state where the discharge end of the column 55 is inserted deepest into the discharge communication hole 61. It is arranged to be located.

A second valve seat hole is provided in the discharge-side column communication hole 55b toward the downstream side. In this embodiment, the second valve seat hole is provided upstream of the discharge-side distal end face of the column 55. A second valve seat hole is provided. In this embodiment, a second valve seat hole including a tapered portion 70 that expands in the downstream direction is provided in the discharge-side column communication hole 55b. Here, a check ball 58b having an outer diameter larger than the minimum meridian and smaller than the maximum meridian of the tapered portion 70 is provided as a discharge-side check valve body.

The check ball 58b is connected to the discharge side communication hole 6
1 is restricted from moving downstream. This second check ball 58b is
It is constituted by an end face portion 61b provided on the downstream side of the discharge side communication hole 61, and the opening is not closed on the end face portion 61b even if the check ball 58b abuts.
A plurality of discharge communication holes 61c are provided at positions eccentric from the center, and each discharge communication hole 61c communicates with the discharge port.

Accordingly, when the jetted fluid storage chamber 52 is pressurized, the check ball 58b moves downstream from the tapered portion 70, which is the second valve seat hole, and the second valve seat hole is opened. Is done. As a result, the discharge-side communication hole 61 communicates with the discharge-side column communication hole 55b, and the ejection fluid is ejected from the ejection fluid storage chamber 52. At this time, check ball 58b
Is an end face portion 61 provided on the downstream side of the discharge side communication hole 61.
The movement is restricted by contact with b.

Conversely, when the pressure of the ejection fluid storage chamber 52 is reduced, the check ball 58b is pressed (or adsorbed) against the tapered portion 70, which is the second valve seat hole, and the discharge side communication hole 61 (the first communication hole 61) is pressed. One valve seat hole) is closed. For this reason,
Since the check ball 58b does not move into the ejection fluid storage chamber 52 while preventing the backflow of the ejection fluid from the ejection port, the check ball 58b always stays inside the ejection-side communication hole 61 (or the ejection-side column communication hole 55b). Will be retained.

The discharge side end member 5 of the ejection system unit 50
A suction-side one-way valve (check valve) constituted by the above-described members is provided inside the cylinder 4.
It mainly includes a check ball 58b, a discharge-side column communication hole 55b of the column 55, and an end face portion 61b inside the discharge-side communication hole 61. That is, an efficient one-way valve can be constructed with a small number of members also for the second check valve.

Next, a jet knife which is a fluid ejection device using the pressure converter and the ejection system unit according to this embodiment will be described with reference to FIG.

A pressurizing device 101 is connected to a communication hole 2a provided in the outer casing 2 of the pressure converter 1.
Hydraulic oil as a driving fluid is supplied into the driving fluid storage chamber 3, and an oscillating pressure that alternately pressurizes and depressurizes the hydraulic oil filled in the driving fluid storage chamber 3 is transmitted. Is done.

The pressurizing device 101 is, for example, a piston means 1 for continuously moving forward and backward by rotating a motor.
03 and the like are provided to generate the vibration pressure as described above. Further, an appropriate amount of hydraulic oil is supplied into the driving fluid storage chamber 3 by the volume changing means 105, and the driving fluid storage chamber 3 is filled with the hydraulic oil, and the gap between the rubber tube 4 and the silicon tube 51 is adjusted. I do.

In the ejection system unit 50, a saline infusion pack 110 serving as an ejection fluid supply source is connected to a lower suction port via an infusion tube 112, and a handpiece serving as an ejection section is connected to the upper ejection port. (Nozzle) is connected via an infusion tube 114.

As described above, at the time of operation, the working fluid is previously filled in the driving fluid storage chamber 3 by the action of the volume changing means 105 and the like, and further, the ejection fluid storage chamber 52 is filled with physiological saline as the ejection fluid. At the same time, the pressurizing device 101 supplies the vibration pressure in a state where the rubber tube 4 and the silicon tube 51, which are the partition walls, are in close contact with each other.

In this case, the vibration pressure applied to the driving fluid storage chamber 3 is applied to the ejection fluid storage chamber 5 by using the close contact portion between the rubber tube 4 and the silicon tube 51 as a pressure transmitting section.
2 and the saline is continuously sucked and discharged from the ejection fluid storage chamber 52.

Considering once repetition of pressurization and decompression,
At the time of pressurization, while the rubber tube 4 is in close contact with the silicon tube 51, the silicon tube 51 is pressed toward the axis (in the radial direction) to deform (expand), and
The inside of the silicone tube 51 of 0 is pressurized, and the physiological saline is pressurized and discharged from the discharge portion, and the physiological saline is jetted from the handpiece 100.

Next, at the time of pressure reduction, the expansion of the rubber tube 4 is contracted, and the bent silicon tube 51 tries to return to the original state by the elastic force.
When the pressurized physiological saline in 0 tries to return to the atmospheric pressure, a negative pressure is generated in the ejected fluid storage chamber 52, and the physiological saline is sucked into the ejected fluid storage chamber 52 from the suction part and enters there. Will be stored.

By repeating this in an early cycle, a jet fluid having a substantially continuous and constant jet pressure can be obtained. The apparatus shown in this embodiment is applied to a jet scalpel used for surgery and the like. .

In addition, when replacing the ejection system unit (when inserting and removing).
The piston means 103 and the like of the pressurizing device 101 are stopped, and the volume of the fluid on the pressurizing device 101 side is increased by the volume changing means 105 so that the rubber tube is at least brought into close contact with the silicon tube 51. 4 to eliminate the inward expansion.

As a result, the ejection system unit 50 can be easily inserted and removed, and there is no need to completely remove the drive fluid from the drive fluid storage chamber 3 and it is not necessary to disassemble or wash the drive fluid. Can be easily performed.

At this time, the body portion does not include the liquid contact portion of the physiological saline, but is entirely included in the ejection system unit. since in locations not in contact, the source and the infusion tube saline connected jetted system unit and here, it is sufficient only sterilized handpiece etc., thorough sterilization or the like of the main body portion is not required There are advantages too.

In the above embodiment, the driving fluid storage chamber 3 itself has a substantially hollow cylindrical shape, and the ejection fluid storage chamber 52 fitted into the hollow portion has a substantially cylindrical shape. In other words, it serves as a pressure transmitting portion. The rubber tube 4 of the driving fluid storage chamber 3 and the silicon tube 51 of the ejection fluid storage chamber 52 are both formed in a cylindrical shape, and the pressure in the radial direction toward the axis thereof is transmitted over the entire side surface. Therefore, pressure transmission is performed efficiently.

Further, since the ejection system unit 50 is removable from the inside of the pressure converter 1, if the ejection system unit 50 is replaced with a separate ejection system unit which has been sterilized and washed in advance, the ejection system unit 50 can be disposable. Can be used as As a result, it is possible to omit the sterilization / cleaning process of the jetting unit once used, to further reduce the time required for the sterilization / cleaning process, and to improve hygiene.

In the above embodiment, an example in which the present invention is applied to a jet knife has been described. However, the present invention is not limited to this.
As long as it is configured to transmit and discharge pressure to the ejected fluid as a secondary medium, the present invention can be applied to a pressurized ejection device for other fluids (for example, a slurry fluid).

[0198]

As described above, according to the present invention,
The ejection system unit is composed of a member independent from the inside of the pressure converter main unit, and is configured to be detachable from the main unit. Therefore, it is easy to attach / detach or replace only the ejection system unit, and to perform operations such as cleaning and sterilization. There are advantages that can be done.

In particular, since only the ejected fluid storage chamber, ejected fluid suction section, and ejected fluid discharge section serving as the liquid contacting section of the ejected fluid are independent of the main body, the liquid contact section is used each time it is used due to sanitary problems. If it is applied to equipment that requires cleaning (including sterilization and disinfection) of the parts or equipment that requires frequent repairs due to severe wear and damage of the wetted parts, the workability of the equipment will be significantly improved. .

In addition, since the ejection system unit is removable from the inside of the pressure converter main body, if the ejection system unit which has been subjected to a cleaning process such as sterilization is inserted before use, the used ejection system unit can be used. Can also be used as disposable.

On the other hand, according to the pressure converter of the present invention,
There is an advantage that the pressure can be efficiently transmitted even if the ejection system unit is a separate member from the main body, and a fluid ejection device excellent in ejection pressure can be constructed.

[Brief description of the drawings]

FIG. 1 is a schematic sectional view of the configuration of a pressure converter and an ejection system unit according to the present invention.

FIG. 2 is a schematic sectional view of the configuration of an ejection system unit according to the present invention.

FIG. 3 is an explanatory diagram showing a flow of a jetting fluid.

FIG. 4 is an application example of the pressure converter and the ejection system unit according to the present invention.

[Explanation of symbols]

 1: Pressure converter 2: Outer shell container 3: Driving fluid storage chamber 4: Rubber tube (elastic member) 5: Split presser plate 6: Presser fitting 7a: Upper seal member 7b: Lower seal member 50: Ejection system unit 51: Silicon tube (elastic member) 52: ejection fluid storage chamber 53: suction side end member 54: discharge side end member 55: strut 55a: suction side strut communication hole 55b: discharge side strut communication hole 56: suction side external collar 57: discharge Outer side collar 58a: Check ball 58b: Check ball 61: Discharge side communication hole 63: Suction side communication hole 65: O-ring 66: Tapered holding portion 68: Tapered holding portion 70: Tapered portion 100: Handpiece 101: Pressurizing device 103: piston means 105: variable volume means 110: infusion pack 112: infusion tube 114: infusion tube

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-5-33773 (JP, A) JP-A-9-151855 (JP, A) JP-A-8-58897 (JP, A) 87375 (JP, U) Japanese Patent Publication No. 6-22604 (JP, B2) Jikken 48-40169 (JP, Y1) (58) Fields investigated (Int. Cl. ⁷ , DB name) F04B 9/00-15 / 08 F04B 43/00-45/10 F04B 53/00-53/22

Claims (6)

(57) [Claims] 1. A pressure converter section provided with an ejection fluid storage chamber for storing an ejection fluid and a drive fluid storage chamber for storing a drive fluid adjacent to each other, and pressurization for applying an oscillating pressure to the drive fluid. Means, the vibration pressure is transmitted through an adjacent portion between the ejection fluid storage chamber and the driving fluid storage chamber, so that the ejection fluid is sucked into the ejection fluid storage chamber and the ejection fluid is discharged. In the fluid ejection device for discharging from the ejection fluid storage chamber, the ejection fluid storage chamber has a cylindrical outer wall portion, and is provided separately and separately from the device main body portion, and with respect to the pressure converter portion. The driving fluid storage chamber is a circle facing the cylindrical outer wall portion.
Having a cylindrical hollow portion, provided in the pressure converter section separately from the jetted fluid storage chamber, and the pressure converter section is provided with the circle of the jetted fluid storage chamber.
A cylindrical outer wall portion and the cylindrical hollow portion of the driving fluid storage chamber;
In the portion adjacent to the inner wall portion, the vibration pressure is transmitted in a state where the respective wall members are in close contact with each other, and at least one of the portions in which the respective wall members are in close contact with each other.
Parts are made of elastic members that can transmit pressure by fluid.
And the axis of symmetry of the cylindrical outer wall portion inside the ejection fluid storage chamber.
A fluid ejection device, wherein a strut member is disposed at a position . 2. A discharge fluid storage chamber for storing a discharge fluid and a drive fluid storage chamber for storing a drive fluid are disposed adjacent to each other, and a vibration pressure applied to the drive fluid is controlled by the discharge fluid storage chamber. Is transmitted through an adjacent portion of the driving fluid storage chamber and thereby the suction fluid is sucked into the discharge fluid storage chamber and used for a fluid ejection device that discharges the ejection fluid from the ejection fluid storage chamber. An ejection system unit configured to be detachable from a main body of the pressure converter and including the ejection fluid storage chamber, an ejection fluid suction unit connected to the ejection fluid storage chamber, and an ejection fluid discharge unit. Holding means for detachably holding the ejection system unit with respect to the main body of the pressure converter, wherein the driving fluid storage chamber is isolated from the ejection fluid storage chamber. The ejection fluid storage chamber has a cylindrical outer wall portion, and the driving fluid storage chamber is provided independently in the main body portion.
A cylindrical hollow portion, wherein the oscillating pressure is applied to the cylindrical outer wall of the ejection fluid storage chamber;
Part and the inner wall of the cylindrical hollow part of the driving fluid storage chamber
The ejection fluid storage chamber and the driving fluid storage chamber are
The outgoing units are attached to each other with the
At least a part of the wall member of
A symmetrical axis of the cylindrical outer wall portion in the ejection fluid storage chamber , each of the elastic members being capable of transmitting a force.
A pressure converter, wherein a strut member is disposed at a position . 3. An independent ejection system unit used in a fluid ejection device for sucking and ejecting ejection fluid into and from an ejection fluid storage chamber by the action of pressure transmitted from the outside, wherein the unit constitutes a flow path of the ejection fluid. Among the members, an ejection fluid storage chamber for storing at least the ejection fluid, an ejection fluid suction unit including an inlet for flowing the ejection fluid into the ejection fluid storage chamber, and ejection from the ejection fluid storage chamber. An ejection fluid discharge portion provided with an ejection port for ejecting a working fluid, and a support member disposed in a direction of a symmetric axis of the cylindrical outer shape inside the ejection system unit; and the ejection fluid storage chamber. Is constituted by a space closed by a cylindrical elastic member capable of transmitting pressure by a fluid, and a suction side end member and a discharge side end member which respectively cover both ends of the cylindrical elastic member, The ejected fluid suction Is provided in the suction-side end member, and includes a one-way valve that is opened only when the ejection fluid flows into the ejection-fluid storage chamber. The ejection-fluid discharge portion is provided in the discharge-side end member. A one-way valve disposed only when discharging the ejection fluid from the ejection fluid storage chamber, wherein the strut member is relatively movable in the axial direction with respect to at least one of the end members. An ejection system unit for use in a fluid ejection device, which is held in an appropriate state. Wherein said each end member, and each end member having an inlet or outlet of the jet fluid, and the outer collar member that covers at least a portion of the outer peripheral portion of the end member, Yu claims, and between the end member and the outer collar portion, and wherein the holding and clamping the end portion of the cylindrical elastic member
Item 4. An ejection system unit according to Item 3 . 5. An independent ejection system unit used in a fluid ejection device for sucking and ejecting ejection fluid by the action of pressure transmitted from the outside to an ejection fluid storage chamber, wherein the cylindrical unit is capable of transmitting pressure by the fluid. A suction-side end member provided with an inflow port for covering the one end opening of the cylindrical elastic member at both ends thereof and for injecting a jetting fluid; and one end opening of the cylindrical elastic member at both ends. A discharge-side end member provided with a discharge port for discharging the cover ejection fluid; a support member disposed at a symmetrical axis position of the cylindrical elastic member; and an ejection fluid flowing into the ejection fluid storage chamber. A one-way valve that opens only when the discharge is performed, and a one-way valve that opens only when the discharge fluid is discharged from the discharge fluid storage chamber, wherein each of the end members includes the suction port or the discharge port. Each end member and these An external collar member that covers at least a part of an outer peripheral portion of the end member, wherein the end portion of the cylindrical elastic member is sandwiched and held between the end member and the external collar portion, An ejection fluid storage chamber for storing the ejection fluid is configured by a space closed by the cylindrical elastic member, the suction side end member, and the discharge side end member, and an end member of the suction side end member includes: The end member of the discharge-side end member has a discharge communication hole that communicates with the discharge port of the ejected fluid, and the support member has two ends. A suction-side column communication hole that is inserted into the suction communication hole and the discharge communication hole and is held so as to be movable in the axial direction, and communicates the ejection fluid storage chamber with the suction communication hole; The jet fluid storage chamber and the discharge A discharge-side column communication hole for communicating with the communication hole, and pressure is transmitted from the outside via a cylindrical elastic member constituting an outer wall of the ejection fluid storage chamber, and the elastic member has an elasticity. An ejection system unit for a fluid ejection device, wherein the ejection fluid is sucked and ejected by the action of a force or the transmission pressure. 6. suction passage of the suction-side end member,
A first valve seat hole formed of a tapered portion expanding toward the downstream side of the ejected fluid, wherein the one-side valve on the suction side is a ball seated on the valve seat hole from the downstream side of the ejected fluid. A first check valve body having a shape, wherein one end of the support member inserted into the suction-side communication hole restricts movement of the first check valve body in a downstream direction of the jet fluid. The discharge communication hole of the discharge end member has a configuration in which the other end of the support member is inserted to close the discharge communication hole, and the discharge communication hole of the support member is closed. The hole is provided with a second valve seat hole formed of a tapered portion expanding toward the downstream side of the ejection fluid, and one valve of the discharge side end member ejects the second valve seat hole with respect to the second valve seat hole. Has a ball-shaped second check valve seated from the downstream side of the fluid , Claims the inside the discharge passage of the discharge-side end member, said those comprising a second abutment means comprising an end face for limiting the movement of the downstream direction of the jet fluid check valve body, it is characterized by Item 6. An ejection system unit of the fluid ejection device according to Item 5 .