JP3655759B2 - Medical pump unit - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a medical pump unit that is provided in various devices such as a light source device and is used for air supply, water supply, suction, and the like in medical treatment.
[0002]
[Prior art]
In general, an endoscope is formed by observing an organ in a body cavity by inserting the elongated insertion portion into the body cavity, or introducing a treatment tool into the body cavity through a treatment tool channel formed in the insertion portion. Various treatments and treatments can be performed. At the distal end of the insertion portion of the endoscope, a distal end configuration portion in which various optical elements are disposed is provided. In addition, the endoscope is provided with a light guide made of a fiber bundle as illumination light transmission means. One end portion of the light guide is located on the end surface of the illumination lens of the illumination optical system disposed in the tip configuration portion.
[0003]
When performing inspection / observation or treatment using such an endoscope, the peripheral device is connected to the control device such as a camera control unit or the other end of the light guide and connected to the other end of the light guide through the light guide. A light source device that supplies illumination light to the tip, a monitor that displays an endoscopic image of the site to be inspected, and the like are required. In addition, for example, an ultrasonic treatment apparatus that performs crushing / aspiration of the affected tissue in a living body by ultrasonic vibration is also used.
[0004]
Generally, a pump unit as an air / water supply source is mounted inside the light source device. This pump unit, for example, supplies a cleaning liquid (water or the like) for washing away body fluid or blood adhering to the lens cover covering the objective lens of the observation optical system arranged at the tip configuration part, or the lens cover. It is used when a gas (air or the like) for removing water droplets adhering to the gas is supplied or a gas for expanding the body cavity is supplied.
[0005]
Such a pump unit is also used in treatment using the above-described ultrasonic therapy apparatus. The ultrasonic treatment apparatus is intended to crush or emulsify the affected tissue by bringing the tip of the probe into contact with the desired affected tissue and transmitting ultrasonic vibration to the tip of the probe. In the treatment using, a perfusion solution such as physiological saline is supplied around the affected tissue abutting the probe, and the affected tissue or the like crushed or emulsified by ultrasonic vibration is provided at the tip of the probe together with the perfusate. The suction opening is always removed through the opening and the suction path of the handpiece communicating with the opening. In laparotomy and brain surgery, it is extremely important to aspirate and remove tissues accumulated in the vicinity of the affected tissue, blood and physiological saline, etc., in order to secure a surgical field and perform reliable surgery. A pump unit is used to supply the liquid.
[0006]
Normally, various noises are generated from the pump (mechanical noise due to driving of the pump, noise due to gas pressure fluctuation at the suction / outlet of the pump, noise due to vibration transmitted from the pump, etc.). However, since various devices such as a light source device equipped with a pump unit are mainly used in a hospital room, when noise is emitted from the pump, it causes a lack of concentration of the operator and conversation between the operators. In addition, it is difficult to obtain auditory information that is important for observation and treatment such as signal sounds emitted from the system, and there is a possibility that the examination and treatment cannot be completed smoothly. Therefore, the air / water pump built in the light source device and the suction pump in the ultrasonic therapy device have been devised to suppress noise.
[0007]
For example, Japanese Utility Model Publication No. 3-46749 discloses a structure that suppresses mechanical noise due to pump driving and noise due to gas pressure fluctuation at the pump outlet. Japanese Patent Application No. 9-3444631 discloses a technique for suppressing noise due to gas pressure fluctuation at the pump outlet. Further, Japanese Patent Application No. 9-107897 discloses a structure for suppressing noise caused by vibration transmitted from a pump.
[0008]
[Problems to be solved by the invention]
However, the technology disclosed in Japanese Utility Model Publication No. 3-46749 can suppress noise at the delivery port of the pump connected to the medical device, but is emitted from the suction port of the pump not connected to the medical device. The sound cannot be suppressed. Moreover, since the pump is installed in the sealed case, if the pump itself generates heat by driving, there is no possibility of a heat escape and the life of the pump may be significantly reduced.
[0009]
In the technique disclosed in the specification of Japanese Patent Application No. 9-346331, a long tube is used to suppress noise due to gas pressure fluctuation at the pump outlet. Therefore, a large space is required.
[0010]
Further, with the technique disclosed in Japanese Patent Application No. 9-107897, vibration noise caused by driving the bomb can be suppressed, but noise due to gas pulsation cannot be suppressed.
[0011]
The present invention has been made by paying attention to the above circumstances, and the object of the present invention is to suppress noise emitted from the suction port and the delivery port of the pump without increasing the size of the structure, and the pump. It is an object of the present invention to provide a medical pump unit that can cool the battery efficiently.
[0012]
[Means for Solving the Problems]
In order to solve the above-described problems, the present invention provides a medical pump unit that is installed in a housing of a device used in combination with a medical device and has a pump for performing pressure feeding or suction. A pump housing the pump in a substantially sealed state, and support means for supporting the pump in the housing via a support member made of an elastic body. The housing has a plurality of wall surfaces. The pump is surrounded by a sealing case, and a vent hole is provided through a wall surface other than the wall facing the suction port and the delivery port of the pump. The sealing case has a dimension of the inner wall, and the pump itself is driven. The elastic body is larger than the maximum position of the amplitude of the pump when the elastic body is elastically deformed by vibration due to the vibration, and the elastic body is damaged And without, characterized in that said elastic member is smaller than the position of the pump when the elastically deformed to the maximum.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0014]
1 to 3 show a first embodiment of the present invention. The pump unit of the present embodiment is installed in a housing of various devices such as a light source device, and includes a housing formed by a pump 1, an upper sealing case 2, and a lower sealing case 3, a vibration isolating member 4, and a connecting member. 5 and an airtight member 6.
[0015]
As clearly shown in FIG. 2, the pump 1 is supported by the lower sealing case 3 in a vibration-proof manner via a plurality of vibration-isolating members 4 as elastic bodies having a shape in which a plurality of cones are vertically connected. Yes. In this case, the lower end of each vibration isolation member 4 protrudes downward from the bottom surface of the lower sealing case 3 and is fixed on, for example, a support surface of a housing of a device (light source device or the like) on which the pump unit is mounted. The pump 1 has a suction port 7 and a delivery port 8, and both the suction port 7 and the delivery port 8 are open in the same direction. One of the suction port 7 and the delivery port 8 of the pump 1 (the delivery port 8 in the present embodiment, so the pump 1 of the present embodiment is used as a pressure feed pump) is a single member provided in the connecting member 5. The other end of the tube 9 is connected to an air supply / water supply conduit of an endoscope (not shown) as a medical device or a suction passage of an ultrasonic probe as a medical device via a pipe 10. .
[0016]
As clearly shown in FIG. 2, the upper sealing case 2 includes a first side wall 2a facing the suction port 7 and the delivery port 8 of the pump 1, and a second side on the opposite side facing the first side wall 2b. Side wall 2b. A through hole 12 is formed in the second side wall 2b.
[0017]
The connecting member 5 is made of, for example, a rectangular plate material. A concave fitting groove 40 is formed on the peripheral side surface of the connecting member 5 over the entire periphery. The upper sealing case 2 and the lower sealing case 3 are assembled to each other when their wall surfaces 2a, 3a are fitted into the fitting grooves 40 of the connecting member 5 (see FIG. 2). Further, a step 42 that is slightly larger than the upper sealing case 2 is provided on the outer periphery of the lower sealing case 3 joined to the upper sealing case 2, and the upper sealing case 2 is interposed inside the step 42 through an airtight member 6. Are fitted and fastened by screws 11. The airtight member 6 is made of an elastic body and has the same shape as the outer periphery (joint surface) of the lower sealing case 3 to which the upper sealing case 2 is joined.
[0018]
In the pump unit of the present embodiment configured as described above, the pump 1 is supported by the vibration isolating member 4 made of an elastic body, so that vibrations from the pump 1 are caused by the sealing cases 2 and 3. It is not transmitted to the casing of the installed device (light source device etc.).
[0019]
Moreover, in the pump unit of this embodiment, since the pump 1 is installed in the sealing cases 2 and 3 and the connection member 5 and the airtight member 6 have high airtightness, the pump 1 is driven. Noise is not transmitted to the outside of the sealing cases 2 and 3.
[0020]
Moreover, in the pump unit of this embodiment, since the through-hole 12 is provided in the 2nd side wall 2b which does not oppose the opening of the suction inlet 7 and the delivery port 8 of the pump 1, the through-hole 12 and the suction inlet. 7 or the outlet 8 (suction port 7 in the present embodiment) flows in a convection over the entire space in the sealed cases 2 and 3. Therefore, a high pressure buffering action occurs, and the pulsation of the gas flowing between the through hole 12 and the suction port 7 is canceled (the gas pulsation can be smoothed by the pressure buffering action), and at the same time, heated by the heat generated by the pump 1. The gas is discharged outside the sealing cases 2 and 3 without being trapped in the sealing cases 2 and 3. Therefore, the noise generated by the operation of the pump 1 can be suppressed and the pump 1 can be efficiently cooled without increasing the size of the structure.
[0021]
That is, according to the pump unit of this embodiment, since new gas always enters the cases 2 and 3, the pump 1 can be efficiently cooled, and the cases 2 and 3 themselves serve as chambers. Even if the silencer is not attached to the suction port 7 of the pump 1, noise from the suction port 7 can be reduced.
[0022]
4 and 5 show a second embodiment of the present invention. The pump unit according to this embodiment is characterized in that the separation distance between the pump 1 and the cases 2 and 3 is set within a predetermined range. Other configurations are the same as those in the first embodiment.
[0023]
4 and 5, the alternate long and short dash line indicates the maximum amplitude of the pump 1 when the pump 1 vibrates and the vibration isolation member 4 is elastically deformed (oscillated) only by driving the pump 1 itself. The two-dot chain line indicates the maximum amplitude of the pump 1 when the vibration isolating member 4 is elastically deformed (oscillated) to the maximum without being damaged. As can be seen from the figure, in the present embodiment, the space between the pump 1 and the cases 2 and 3 is such that the inner wall surfaces of the sealing cases 2 and 3 are present in the region sandwiched between the alternate long and short dashed lines. The distance is set. Further, the pipe 9 provided in the connecting member 5 is formed of a rigid body at least at a portion protruding outside the sealed cases 2 and 3.
[0024]
In the pump unit of the present embodiment configured as described above, the inner wall surfaces of the sealing cases 2 and 3 are present in the region sandwiched between the one-dot chain line and the two-dot chain line. Even if 1 greatly vibrates (vibrates greatly during transportation or the like), the pump 1 abuts against the sealing cases 2 and 3, so that the vibration isolating member 4 is not deformed beyond the maximum deformation amount and is not damaged. Further, since the portion of the tube 9 protruding outside the sealed cases 2 and 3 is formed of a rigid body, the pipe 10 is curved in the housing of the device (light source device or the like) in which the sealed cases 2 and 3 are installed. Therefore, the restoring force does not reach the pump 1, and the pump 1 always maintains the desired positional relationship with respect to the sealing cases 2 and 3. Therefore, since the separation distance between the sealing cases 2 and 3 and the pump can be set to the minimum within the predetermined range (there is no need to allow for the dimensions of the inner wall surfaces of the cases 2 and 3), the pump unit Miniaturization can be achieved. Further, since the volume occupied by the gas in the cases 2 and 3 is small, the time for the gas to accumulate in the cases 2 and 3 is short, and the gas in the cases 2 and 3 newly enters the through-hole 12 in a short time (pump When 1 functions as a suction pump, the gas is discharged through the through hole 12). Therefore, the cooling effect of the pump 1 is high.
[0025]
FIG. 6 shows a third embodiment of the present invention. In the pump unit according to the present embodiment, the through hole 12 is formed in the bottom surface of the lower sealing case 3, and the lower sealing case 3 is attached to the chassis of the casing (not shown) via the bar member 13. Yes. Further, the bottom wall of the lower sealing case 3 has a first side wall 2 a facing the suction / outlet ports 7 and 8 of the pump 1 when viewed from the through hole 12 so that the gas flows in the entire sealing cases 2 and 3. A partition 14 is erected on the side close to.
[0026]
The chassis is provided with a plurality of through holes or slits communicating with the outside air in the periphery facing the through holes 12. In this case, a cooling device such as a fan may be attached to the chassis. Other configurations are the same as those in the first embodiment.
[0027]
In the pump unit of the present embodiment configured as described above, when the pump 1 operates as a pressure feeding device, a gas having a temperature lower than the gas in the sealing cases 2 and 3 passes through the through-hole 12. While being sucked into the sealed cases 2 and 3, the gas in the sealed cases 2 and 3 heated by the pump 1 is discharged through the outlet 8. Therefore, the pump 1 can be effectively cooled.
[0028]
When the pump 1 operates as a suction device, the gas in the sealing cases 2 and 3 is discharged through the through hole 12. At this time, if the temperature difference between the gas inside and outside the sealing cases 2 and 3 is small, the heat of the gas is difficult to be transferred to the gas outside the sealing cases 2 and 3, and the pump 1 cannot be cooled effectively. Since the temperature of the gas outside of 2 and 3 is low, heat can be discharged at the same time as the gas in the cases 2 and 3 is discharged, so that the pump 1 can be effectively cooled.
[0029]
In addition, according to the technical content demonstrated above, the various structures as shown below are obtained.
[0030]
1. In an endoscope apparatus provided with a pump for performing air supply, water supply, or suction, the case of the pump having a built-in pump, which is not connected to the apparatus connected to the housing and performing medical practice An endoscope apparatus characterized in that a through hole is formed in a wall surface that does not face a suction / outlet port.
[0031]
2. The dimension of the inner wall of the case containing the pump through a vibration-damping member capable of deforming the pump is smaller than the position of the pump when the elastic member is deformed by the maximum amount, and larger than the position of the pump due to the pump's own driving vibration. The endoscope apparatus according to item 1, characterized in that:
[0032]
3. Item 1 is characterized in that a through hole communicating with the vent of the pump is formed in a case where a gas outside the case having a gas temperature lower than the gas temperature in the case exists in the case incorporating the pump. The endoscope apparatus described.
[0033]
【The invention's effect】
As described above, according to the medical pump unit of the present invention, it is possible to suppress noise generated from the suction port and the delivery port of the pump without increasing the size of the structure, and to efficiently cool the pump. can do.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view of a medical pump unit according to a first embodiment of the present invention.
2 is a longitudinal sectional view of the medical pump unit of FIG. 1. FIG.
3 is a cross-sectional view of the medical pump unit of FIG.
FIG. 4 is a longitudinal sectional view of a medical pump unit according to a second embodiment of the present invention.
5 is a cross-sectional view of the medical pump unit of FIG.
FIG. 6 is a longitudinal sectional view of a medical pump unit according to a third embodiment of the present invention.
[Explanation of symbols]
1 ... Pump 2 ... Upper sealed case (housing)
2a, 2b ... sidewall (wall surface)
3 ... Lower sealed case (housing)
4 ... Vibration isolation member (support member)
7 ... Suction port 8 ... Delivery port 12 ... Through hole (vent hole)

Claims (1)

In a medical pump unit that is installed in a housing of a device used in combination with a medical device and has a pump for performing pressure feeding or suction,
A pump having a suction port and a delivery port;
A housing for storing the pump in a substantially sealed state;
Supporting means for supporting the pump in the housing via a support member made of an elastic body,
The housing surrounds the pump by a sealing case having a plurality of wall surfaces, and a vent hole is provided through a wall surface other than the wall surface facing the suction port and the delivery port of the pump,
The sealing case has a size of the inner wall larger than the maximum position of the amplitude of the pump when the elastic body is elastically deformed only by the vibration of the pump itself, and the elastic body is not damaged. A medical pump unit characterized in that it is smaller than the position of the pump when the elastic body is elastically deformed to the maximum.

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