JP6435182B2 - Quantitative injection mechanism of aerosol container - Google Patents

Description

  The present invention relates to an injection mechanism connected to a valve stem for injecting content liquid disposed at an upper end portion of an aerosol container, and more particularly to a quantitative injection mechanism capable of quantitative injection.

Examples of the prior art include the inventions described in the following patent documents proposed by the applicant of the present application.
The quantitative injection button described in the following Patent Document 1 includes a stem connection portion and an operation portion. A conduction path is formed in the stem connection portion, an inlet of the conduction path communicates with the valve stem, and an outlet thereof is an operation portion. It communicates with the interior space. A fixed-quantity chamber is formed between the conduction path of the stem connection part and the injection port of the operation part. The distal end portion of the stem connecting portion is disposed inside the operating portion, and sealing means is provided on the joint surface between the distal end side outer wall surface of the stem connecting portion and the inner wall surface of the operating portion. This sealing means comprises a narrow diameter portion on the distal end side of the stem connecting portion, a subsequent large diameter portion, and an annular valve provided on the inner wall surface of the operating portion engaged therewith. Sealing is performed when the annular valve is engaged with the large-diameter portion, and the sealing is released when the annular valve is fitted with the small-diameter portion.

  The injection button described in Patent Document 2 below includes a button main body and a valve rod and an injection port member that are arranged in a conduction path of the shaft core. The inlet portion of the conduction path of the button main body portion communicates with the valve stem, and an injection port is provided at the tip of the injection port member that is fitted on the outlet side. A coil spring is interposed between the valve stem and the button main body to bias the valve stem downward. Sealing means is provided on the joint surface between the outer wall surface on the tip end side of the valve stem and the inner wall surface of the injection port member. Sealing means is also provided between the base end of the valve stem and the conduction path of the button body. When this blocking means blocks the conduction path, the upper sealing means is released and a predetermined amount of content liquid is sprayed from the injection port. A coil spring is also provided between the button main body and the injection port member.

JP 2012-201401 A JP 2012-200560 A

In the conventional quantitative injection button, since the quantitative chamber is provided in the injection button, the volume of the quantitative chamber can be changed, but there is a certain limit to the volume that can be changed. .
In the present invention, the capacity of the metering chamber can be freely changed, and the object is to provide an apparatus that can be implemented even if it has a relatively large internal volume.

Therefore, in the present invention, the solution to the above problem is intended as an injection mechanism including an injection button that can be attached to the upper end portion of the aerosol container, not as a fixed injection button.
Furthermore, in the present invention, the manufacturing operation is facilitated, that is, the assembly is facilitated and the filling of the chemical solution is facilitated, the standard valve can be used, or the malfunction is prevented. Addition and remounting of a lock member for the virgin seal are included as problems.

In order to solve the above-described problem, a first aspect of the present invention is an injection mechanism that is attached to an upper end portion of an aerosol container and is connected to a valve stem that extends upward from the upper end of the container. A fixed portion having a mounting portion attached to the lower end thereof, a main body portion having a vertical passage connected to the valve stem at a substantially central portion thereof, and an operating tube capable of reciprocating vertically in the passage. A dispensing operation portion, and an injection port portion extending in a substantially horizontal direction is provided at an appropriate position of the passage of the main body portion, and an operation tube of the quantitative dispensing operation portion is fitted into the passage so that the valve stem A lateral hole provided in a direction intersecting with the flow path inside the working tube communicates with the communication hole of the injection port when the fixed dispensing operation unit can be in contact with the upper end and is in a non-operating state. When the quantitative dispensing operation unit is in the activated state, the lateral hole is blocked from communicating with the communication hole of the injection port, and a quantitative chamber is provided above the quantitative dispensing operation unit. The flow path of the working tube is connected to the quantification chamber, and the quantitation chamber is provided with a volume expansion / contraction operation unit capable of expanding and reducing the volume of the quantification chamber, and by pressing down the quantification distribution operation unit, The working tube depresses the valve stem, the lateral hole of the working tube is blocked, the content liquid enters the quantitative chamber, the volume expands, and the content liquid is filled into the quantitative chamber, and then to the quantitative dispensing operation unit. When the pressing force is removed, the working tube moves upward, the lateral hole of the working tube communicates with the communication hole of the injection port, and the content liquid in the quantitative chamber is injected into the injection port of the main body by the action of the volume expansion / contraction operation unit is injected to the outside from the parts, the quantitative When the dispensing operation unit is in a non-operating state, a predetermined interval is provided between the lower end surface of the working tube provided on the lower surface of the quantitative dispensing operation unit and the upper end surface of the valve stem of the aerosol container. This is a fixed-quantity injection mechanism for an aerosol container characterized in that the horizontal hole provided in the working tube is larger than the vertical length of the communication hole of the injection port part through which it communicates .

  According to a second aspect of the present invention, in the first aspect, the volume expansion / contraction operation unit includes a reciprocating piston provided in a fixed amount chamber of the fixed amount distribution operation unit. A flow passage is provided, and the flow passage is fitted into the flow passage of the working tube, and the reciprocating piston is always urged upward by an elastic member, and thereby the quantitative dispensing operation portion is pushed down. When the working tube depresses the valve stem, the content liquid in the aerosol container passes through the flow passage of the reciprocating piston from the flow passage of the working tube and enters the metering chamber, and the pressing force is applied from the metering / dispensing operation unit. When removed, the aerosol container quantitative injection mechanism is characterized in that the content liquid is pushed out from the quantitative chamber to the injection port of the main body by an upward biasing force to the reciprocating piston.

  According to a third aspect of the present invention, in the first aspect, the volume expansion / contraction operation unit is formed of a diaphragm, and the diaphragm is disposed at an upper end portion of the flow passage of the operation pipe, and the metering operation unit is depressed. When the content liquid in the container enters the inside of the diaphragm and the diaphragm expands, the inside of the diaphragm constitutes a quantitative chamber, and when the pressing force is removed from the quantitative dispensing operation unit, the diaphragm This is a fixed-quantity injection mechanism for an aerosol container, in which the content liquid is pushed out from the fixed-quantity chamber to the injection port of the main body by the contraction force.

According to a fourth aspect of the present invention, in any of the first to third aspects of the present invention, a cylindrical seal member is provided between the outer periphery of the working tube and a passage inner wall of the main body, and the operation A cylindrical seal member is also provided between the lower end of the tube and the valve stem, and the pair of upper and lower seal members maintain the liquid tightness between the outer periphery of the working tube and the inner wall of the passage of the main body. And the fixed-quantity injection mechanism of the aerosol container characterized by maintaining the liquid-tightness of the channel | path and valve stem of a main-body part.

According to a fifth aspect of the present invention, in any one of the above-described inventions, a lock member is provided between the main body portion and the quantitative distribution operation portion, and when the lock member is attached, the quantitative distribution operation portion is not pressed. An aerosol container quantitative injection mechanism characterized in that when the lock member is blocked and the lock member is removed, the quantitative dispensing operation unit can be depressed.

According to a sixth aspect of the present invention, in the fifth aspect , the lock member holds the outer peripheral portion of the passage in the vertical direction of the main body, and the outer side from an appropriate position of the hold portion. An aerosol container quantitative injection mechanism comprising an extending gripping part and detachably mounted on an outer peripheral part of the passage.

  According to a first aspect of the present invention, the metering unit is composed of a main body and a metering / dispensing operation unit. A metering chamber is provided in the metering / dispensing operation unit, and a volume expansion / contraction operation unit is provided in the metering chamber. When the part is pressed, the working tube provided on the lower surface thereof reciprocates in the central passage of the main body part, and communicates with and seals the injection port part of the main body part. The content liquid in the aerosol container is stored in the quantitative chamber by the abutment and pressing of the stem, and then the content liquid filled in the quantitative chamber is removed from the working tube into the injection port by removing the pressing force of the quantitative dispensing operation unit. Is distributed and injected into the outside world.

With the above configuration, quantitative injection is reliably performed, the configuration is simple, and the volume of the fixed volume chamber can be freely changed in design, and the contents can be easily stored in the container by removing the main body and the constant volume dispensing operation unit from the aerosol container It is also possible to fill the liquid, and it becomes a quantitative injection mechanism that is very easy to use.
Moreover, as an aerosol container, what has a normal valve | bulb can be used, The thing of the valve | bulb which has a special structure is not required, but becomes a versatile quantitative injection mechanism.
The content liquid of the aerosol container is not limited to any kind and may be any type.
Of course, this fixed-quantity injection mechanism can be used even in the inverted state.
In the present invention, when the quantitative dispensing operation portion is in an inoperative state, a predetermined interval is provided between the lower end surface of the working tube provided on the lower surface of the quantitative dispensing operation portion and the upper end surface of the valve stem of the aerosol container. It is characterized in that the interval length is larger than the vertical length of the communication hole of the injection port part through which the horizontal hole provided in the working pipe communicates.
As a result, the communication between the lateral hole of the working tube and the injection port of the main body is securely blocked before the quantitative dispensing operation unit is pushed down and the valve stem of the container is pushed down by the working tube of the quantitative dispensing operation unit. It will be.
That is, when the content liquid is filled into the quantitative chamber, the outflow to the injection port can be more completely prevented, and the amount of inflow into the quantitative chamber can be reliably made constant.

  In the second aspect of the present invention, the volume expansion / contraction operation unit is limited, and a reciprocating piston is used as the volume expansion / contraction operation unit. The volume of the liquid can be freely set, and the content liquid filled in the metering chamber can be reliably jetted from the jetting port to the outside.

In the third aspect of the present invention, similarly to the second aspect of the invention, the volume expansion / contraction operation section is limited, and a diaphragm is used as the volume expansion / contraction operation section.
Since the inside of the diaphragm constitutes a quantitative chamber, the content liquid discharged from the container when the quantitative dispensing operation unit is pressed is filled into the quantitative chamber inside the diaphragm, and then the pressing force of the quantitative dispensing operation unit is removed. As a result, the fixed quantity distribution operation part rises, and the liquid contracting function of the diaphragm circulates from the working tube on the lower surface thereof to the injection port part of the main body part and is jetted to the outside.

In the fourth aspect of the present invention, a cylindrical seal member is provided between the outer periphery of the working tube and the passage inner wall of the main body, and the tubular member is also formed between the lower end of the working tube and the valve stem. The pair of upper and lower seal members maintain the liquid tightness between the outer periphery of the working tube and the inner wall of the passage of the main body, and the liquid tightness between the passage of the main body and the valve stem is also maintained. It will be held.
In the past, a plurality of rubber O-rings were provided to maintain their liquid-tightness, but they can be easily assembled by the pair of cylindrical sealing members, contributing to the stabilization of the assembly, If these sealing members are made of a synthetic resin, there is a merit that there is little risk of deterioration or damage regardless of the type of content liquid (medicine) in the aerosol container.

According to a fifth aspect of the present invention, a lock member is provided between the main body portion and the fixed amount distribution operation portion, and when the lock member is attached, pressing of the constant amount distribution operation portion is prevented. When the is removed, the quantitative distribution operation unit can be pressed.
Further, due to the addition of the lock member, the presence of the lock member also serves as a virgin seal.

According to a sixth aspect of the present invention, the locking member according to the fifth aspect is further limited, and the holding member holds the outer peripheral portion of the passage in the vertical direction of the main body, The holding portion extends from the appropriate position of the holding portion in the outward direction, and can be detachably attached to the outer peripheral portion of the passage.
Thus, after starting to use the aerosol container, the lock member can be attached to prevent malfunction when not in use.

The longitudinal cross-section explanatory drawing of 1st Embodiment which concerns on the fixed injection mechanism of this invention is shown, and the non-use state is shown. It is a longitudinal cross-sectional explanatory drawing of the said 1st Embodiment, Comprising: The fixed_quantity | quantitative_distribution operation part is pushed down and the state with which a content liquid is filled into the fixed_quantity | quantitative_assay chamber is shown. It is a longitudinal cross-sectional explanatory drawing of the said 1st Embodiment, Comprising: The state liquid is being injected in the external field in the state which removed the pressing force from the pressed quantitative distribution operation part. The longitudinal cross-sectional explanatory drawing of 2nd Embodiment which concerns on the fixed injection mechanism of this invention is shown, and the non-use state is shown. It is a longitudinal cross-sectional explanatory drawing of the said 2nd Embodiment, Comprising: The fixed_quantity | distribution distribution operation part is pushed down and the state with which a content liquid is filled in the fixed_quantity | quantitative_assay chamber is shown. It is a longitudinal cross-sectional explanatory drawing of the said 2nd Embodiment, Comprising: The state liquid is injected in the external field in the state which removed the pressing force from the pressed down quantitative distribution operation part. The locking member used in the fixed-quantity injection mechanism concerning the present invention is illustrated, The (A) is a side explanatory view of a wearing state, and (B) is a perspective explanatory view. It is a longitudinal cross-sectional view explanatory drawing which shows 3rd Embodiment which concerns on the fixed injection mechanism of this invention, The non-use state (non-operation state) is shown.

Embodiments of the present invention will be described below with reference to the accompanying drawings.
FIG. 1 is a longitudinal cross-sectional explanatory view of a first embodiment according to the constant injection mechanism of the present invention, and shows a non-use state (or a pre-use state).

  First, the fixed quantity injection mechanism 10 according to the first embodiment of the present invention is provided at a substantially central portion of the main body 11 and a main body 11 to which the lower end is fitted and fitted to the upper peripheral edge M of the aerosol container C. The metering / dispensing operation unit 17 has a working tube 16 that reciprocates up and down in the passage 12 formed at a substantially central portion of the lower surface thereof.

The main body 11 is made of a synthetic resin and has a substantially cylindrical shape, and an annular protrusion 11t as an attachment to the aerosol container C is provided at the lower end edge thereof.
A passage 12 is formed in a substantially central portion in the vertical direction, and an injection port portion 13 is provided in a substantially horizontal direction at an intermediate portion of the passage 12, and the injection port portion 13 communicates with the inside of the passage 12 through a communication hole 13p. To do.

  On the other hand, the quantitative dispensing operation part 17 also has a substantially cylindrical shape made of a synthetic resin, and is provided with a working tube 16 having a flow passage 16p formed on its lower surface side. Is provided with a guide portion 16g surrounding the upper cylindrical portion 11u of the main body portion 11 and sliding up and down on the outer peripheral surface of the upper cylindrical portion 11u.

A horizontal hole (orifice) 16y is provided at a position corresponding to the communication hole 13p of the injection port portion 13 of the main body portion 11 in the state shown in FIG.
In the state of FIG. 1, the lateral hole 16y and the communication hole 13p of the injection port portion 13 are in communication with each other, that is, the metering chamber 18 and the injection port portion 13 are in communication.

A fixed amount chamber 18 (in FIG. 1, the fixed amount chamber 18 is in a state of almost zero volume) is provided in the upper part of the fixed amount distribution operation unit 17, and reciprocates to slide up and down in the fixed amount chamber 18. A piston 20 is provided.
The reciprocating piston 20 serves as a volume expansion / contraction operation unit.
The quantitative dispensing operation unit 17 can reciprocate up and down within the passage 12 of the main body 11 by a working tube 16 provided on the lower surface thereof.

For this purpose, a coil spring 14 as an elastic member is interposed on the outer peripheral portion of the working tube 16 between the lower surface of the quantitative distribution operating unit 17 and the upper end surface of the outer peripheral portion of the passage 12 of the main body 11.
The configuration of the reciprocating piston 20 as a volume expansion / contraction operation unit that reciprocates up and down in the metering chamber 18 has a cylindrical shape made of a synthetic resin as a whole. The flow pipe 21 is provided with a flow passage 21p.

The flow pipe 21 of the reciprocating piston 20 can be reciprocated up and down inside the flow passage 16p of the working pipe 16 provided on the lower surface of the quantitative distribution operation unit 17.
That is, when the coil spring 19 is interposed between the inner side of the upper end surface of the reciprocating piston 20 and the lower surface of the quantitative dispensing operation unit 17, the reciprocating motion can be performed.

A passage 12 provided at a substantially central portion of the main body 11 is formed so as to surround a valve stem S extending upward from the injection valve V disposed at the upper end of the aerosol container C. Inside, the working tube 16 on the lower surface of the quantitative dispensing operation unit 17 can reciprocate up and down.
The lower end surface of the working tube 16 can come into contact with the upper end surface of the valve stem S, and when the former depresses the latter, the content liquid in the aerosol container C is discharged from the valve stem S.

In this embodiment, a gap is formed between the lower end surface 16 t of the working tube 16 and the upper end surface St of the valve stem S.
Although the vertical length of the gap is difficult to read in this drawing, it is formed to be larger than the vertical length (diameter length) of the communication hole 13p of the injection port portion 13.
Thus, the communication hole 13p of the injection port portion 13 is sealed off by the outer wall of the working tube 16 before the lower end surface 16t of the working tube 16 and the upper end surface St of the valve stem S abut.

Thereby, when the content liquid flows into the fixed quantity chamber 18, it can prevent flowing out to the injection port part 13 side.
However, in the actual configuration, the lower end surface 16t of the working tube 16 and the upper end surface St of the valve stem S abut, and if this abutment is secret, leakage to the injection port 13 side can be prevented. The present invention employs the above-described configuration in order to completely prevent leakage to the injection port 13 side and realize fixed injection.

In the figure, reference numeral 24 denotes a lock member. The structure of the lock member 24 will be described again in FIG. 7 later, but the guide portion 16g provided on the lower surface side of the quantitative dispensing operation portion 17 and the outer peripheral portion of the main body portion 11. It is interposed between the step part 11d provided in the intermediate part.
Due to the presence of the lock member 24, the quantitative dispensing operation unit 17 cannot be pressed downward and can maintain an inoperable state.

As a result, erroneous operation is prevented and the function of a virgin seal indicating that the product is not used during the sale of the product can be exhibited.
The user can actuate the quantitative dispensing operation unit 17 by removing the lock member 24 from the main body unit 11.

In addition, a hole is provided in the outer portion of the lower surface of the quantitative distribution operation unit 17, and this hole becomes an air circulation hole 29 having an air circulation function. This air circulation hole 29 is a volume expansion / contraction operation unit. This is provided in order to guarantee the vertical movement of a certain reciprocating piston 20.
Further, the configuration of the injection valve V provided at the upper end of the aerosol container C is a normal one and is the same as the configuration of the conventional valve.

FIG. 2 is a longitudinal cross-sectional explanatory view of the first embodiment, showing a state in which the quantitative dispensing operation section is pressed and the content liquid is filled into the quantitative chamber.
The configuration of the quantitative injection mechanism shown in this figure is exactly the same as that of FIG.
In the quantitative injection mechanism 10 having the same configuration, the lock member is removed, and, as indicated by the arrow D, the top of the quantitative distribution operation unit 17 is pushed downward, and the content liquid in the aerosol container C is put into the quantitative chamber 18. The state of filling is shown.

More specifically, when the top portion 17t of the quantitative dispensing operation unit 17 is pressed in the direction of arrow D, the working tube 16 on the lower surface of the quantitative dispensing operation unit 17 also moves downward.
When the working tube 16 moves downward, the lower end surface 16t of the working tube 16 comes into contact with the upper end surface St of the valve stem S, and the valve stem S is pressed down.

When the valve stem S is pressed, the content liquid in the aerosol container C is discharged upward from the valve stem S through a lateral hole (orifice) below the valve stem S.
The content liquid discharged from the valve stem S passes through the flow passage 16p of the working tube 16 on the lower surface of the quantitative distribution operation portion 17, and flows in the flow tube 21 of the reciprocating piston 20 which is a volume expansion / contraction operation portion above it. It flows through the passage 21p and flows into the fixed quantity chamber 18.

When the content liquid flows into the metering chamber 18, the reciprocating piston 20 is pushed down by the internal pressure of the content liquid.
FIG. 2 shows a state in which the reciprocating piston 20 is moved downward by a predetermined distance and the content liquid is filled in the metering chamber 18. In this state, a fixed amount of content liquid is filled in the metering chamber 18. It is.

FIG. 3 is a longitudinal cross-sectional explanatory view of the first embodiment, showing a state in which the content liquid is ejected to the outside in a state where the pressing force is removed from the pressed quantitative dispensing operation unit.
In FIG. 2, when the pressing force of the quantitative distribution operation unit 17 is removed, that is, when the hand is released from the top portion 17 t of the quantitative distribution operation unit 17, the quantitative distribution operation unit 17 moves the coil spring 14, which is an elastic member. It moves upward by the urging force and returns to the original position as indicated by the arrow F. This state is the state of FIG.

When the quantitative dispensing operation part 17 returns to the original position, the horizontal hole 16y of the working tube 16 moves to the position of the communication hole 13p of the injection port part 13 of the main body part 11, and the positions of both match.
When the horizontal hole 16y and the communication hole 13p are matched, the content liquid filled in the metering chamber 18 circulates through the flow passage 21p in the flow pipe 21 at the substantially center of the reciprocating piston 20, and the metering dispensing operation unit 17 operates. The gas flows through the flow passage 16p of the pipe 16, passes through the communication hole 13p of the injection port 13 from the lateral hole 16y of the working tube 16, and is injected from the injection port at the tip of the injection port 13 to the outside.

At that time, the reciprocating piston 20 is actuated by a coil spring 19 which is an elastic member disposed below the reciprocating piston 20 to push the reciprocating piston 20 upward and discharge the content liquid in the metering chamber 18 to the outside. Perform the action.
As described above, a certain amount of the content liquid filled in the fixed quantity chamber 18 is ejected from the ejection port 13 of the main body 11 to the outside.

Next, a second embodiment of the present invention will be described with reference to FIGS.
The second embodiment is different from the first embodiment only in the configuration of the volume expansion / contraction operation unit provided in the quantitative distribution operation unit, and the other configuration is the same as the first embodiment.
FIG. 4 shows a longitudinal sectional view of a second embodiment according to the constant injection mechanism of the present invention, and shows a non-use state (or a pre-use state).

  The fixed-quantity injection mechanism 30 according to the second embodiment of the present invention is provided in the main body portion 11 that is fitted to the upper peripheral edge portion M of the aerosol container C and to which the lower end portion is attached, and in the substantially central portion of the main body portion 11. The metering / dispensing operation portion 17 has a working tube 16 that reciprocates up and down in the passage 12 at the center of the lower surface thereof.

The main body 11 is made of a synthetic resin and has a substantially cylindrical shape, and an annular protrusion 11t as an attachment to the aerosol container C is provided at the lower end edge thereof.
A passage 12 is formed in a substantially central portion in the vertical direction, and an injection port portion 13 is provided in a substantially horizontal direction at an intermediate portion of the passage 12, and the injection port portion 13 communicates with the inside of the passage 12 through a communication hole 13p. doing.

  On the other hand, the quantitative dispensing operation part 17 also has a substantially cylindrical shape made of a synthetic resin, and is provided with a working tube 16 having a flow passage 16p formed on its lower surface side. Is provided with a guide portion 16g surrounding the upper cylindrical portion 11u of the main body portion 11 and sliding up and down on the outer periphery of the upper cylindrical portion 11u.

A horizontal hole (orifice) 16y is provided at a position corresponding to the communication hole 13p of the injection port 13 of the main body 11 in the state shown in FIG.
In the state of FIG. 4, the lateral hole 16 y and the communication hole 13 p of the injection port portion 13 are in communication, that is, the metering chamber 18 and the injection port portion 13 are in communication.

A fixed amount chamber 18 (in FIG. 1, this fixed amount chamber 18 is in a state of zero volume) is provided in the upper part of the fixed amount distribution operation unit 17, and the fixed amount chamber 18 can be formed by a diaphragm. This diaphragm 25 itself constitutes a volume expansion / contraction operation part.
In other words, the diaphragm 25 is provided at the lower peripheral edge portion of the quantitative distribution operation unit 17 and on the upper part of the flow passage 16p. The diaphragm 25 is expanded by introducing the content liquid from the flow passage 16p, and the content liquid is discharged. In this case, the diaphragm 25 functions.
In addition, the metering / dispensing operation unit 17 can reciprocate up and down within the passage 12 of the main body 11 by a working tube 16 provided on the lower surface thereof.

For this purpose, a coil spring 14 as an elastic member is interposed on the outer peripheral portion of the working tube 16 between the lower surface of the quantitative distribution operating unit 17 and the upper end surface of the outer peripheral portion of the passage 12 of the main body 11.
As described above, the metering chamber 18 is formed by the diaphragm 25, and the diaphragm 25 is made of a synthetic resin having flexibility and elasticity, and the inside of the working tube 16 on the lower surface of the metering / dispensing operation unit 17. When the content liquid of the container is supplied from the flow passage 16p, the inside of the container is expanded or expanded to form the metering chamber 18.
In other words, the upper portion of the constant volume dispensing operation unit 17 has a closed space with a certain volume, and the diaphragm 25 is housed in this space, so that the expansion of the diaphragm 25 is limited to a predetermined volume. .

A passage 12 provided at a substantially central portion of the lower surface of the main body 11 is formed so as to surround a valve stem S extending upward from the injection valve V disposed at the upper end of the aerosol container C. The working tube 16 on the lower surface of the quantitative dispensing operation unit 17 can reciprocate up and down.
The lower end surface of the working tube 16 can come into contact with the upper end surface of the valve stem S, and when the former depresses the latter, the content liquid in the aerosol container C is discharged from the valve stem S.

In this embodiment, a gap is formed between the lower end surface 16 t of the working tube 16 and the upper end surface St of the valve stem S.
Although the vertical length of the gap is difficult to read in this drawing, it is formed to be larger than the vertical length (diameter length) of the communication hole 13p of the injection port portion 13.
Thus, the communication hole 13p of the injection port portion 13 is sealed off by the outer wall of the working tube 16 before the lower end surface 16t of the working tube 16 and the upper end surface St of the valve stem S abut.

As a result, the content liquid can be prevented from flowing out toward the injection port 13 when it flows into the metering chamber 18.
However, in the actual configuration, the lower end surface 16t of the working tube 16 and the upper end surface St of the valve stem S abut, and if this abutment is secret, leakage to the injection port 13 side can be prevented. The present invention employs the above-described configuration in order to completely prevent leakage to the injection port 13 side and realize fixed injection.

In the figure, reference numeral 24 denotes a lock member. The structure of the lock member 24 will be described again in FIG. 7 later, but the guide portion 16g provided on the lower surface side of the quantitative dispensing operation portion 17 and the outer peripheral portion of the main body portion 11. It is interposed between the step part 11d provided in the intermediate part.
Due to the presence of the lock member 24, the quantitative dispensing operation unit 17 cannot be pressed downward and can maintain an inoperable state.

As a result, erroneous operation is prevented and the function of a virgin seal indicating that the product is not used during the sale of the product can be exhibited.
The user can actuate the quantitative dispensing operation unit 17 by removing the lock member 24 from the main body unit 11.

A groove 28 is provided on the inner peripheral surface of the side surface 17 w of the quantitative dispensing operation unit 17, and this groove serves as an air circulation hole 28. The air circulation hole 28 is provided to enable expansion and contraction of the diaphragm 25.
Further, the configuration of the injection valve V provided at the upper end of the aerosol container C is a normal one and is the same as the configuration of the conventional valve.

FIG. 5 is a longitudinal cross-sectional explanatory view of the second embodiment, showing a state in which the quantitative dispensing operation section is pressed and the content liquid is filled into the quantitative chamber.
The configuration of the quantitative injection mechanism shown in this figure is exactly the same as that of FIG.
In the fixed quantity injection mechanism 30 having the same configuration, the lock member is removed, and as shown by the arrow D, the top part 17t of the fixed quantity distribution operation part 17 is pushed downward, and the content liquid in the aerosol container C is discharged into the fixed quantity chamber 18. The state of filling is shown.

More specifically, when the top portion 17t of the quantitative dispensing operation unit 17 is pressed in the direction of arrow D, the working tube 16 on the lower surface of the quantitative dispensing operation unit 17 is also pressed downward.
When the working tube 16 is pushed down, the lower end surface 16t of the working tube 16 comes into contact with the upper end surface St of the valve stem S, and the valve stem S is pushed down.

When the valve stem S is pressed, the content liquid in the aerosol container C is discharged upward from the valve stem S through a lateral hole (orifice) below the valve stem S.
The content liquid discharged from the valve stem S passes through the flow passage 16p of the working tube 16 on the lower surface of the quantitative distribution operation section 17, and enters the inside of the diaphragm 25, that is, the volume expansion / contraction operation section above it, that is, into the quantitative chamber 18. And flows in.

  When the content liquid flows into the fixed volume chamber 18, the diaphragm 25 expands and expands to fill the internal space above the fixed volume distribution operation unit 17. FIG. 5 shows this state, and in this state, a fixed amount of the content liquid is filled in the fixed amount chamber 18.

FIG. 6 is a longitudinal cross-sectional explanatory view of the second embodiment, showing a state in which the content liquid is ejected to the outside in a state where the pressing force is removed from the pressed quantitative dispensing operation unit.
In FIG. 5, when the pressing force of the quantitative distribution operation unit 17 is removed, that is, when the hand is released from the top portion 17 t of the quantitative distribution operation unit 17, the quantitative distribution operation unit 17 moves the coil spring 14, which is an elastic member. It moves upward by the urging force and returns to the original position as indicated by the arrow F. This state is the state of FIG.

When the quantitative dispensing operation part 17 returns to the original position, the horizontal hole 16y of the working tube 16 moves to the position of the communication hole 13p of the injection port part 13 of the main body part 11, and the positions of both match.
When the horizontal hole 16y and the communication hole 13p are matched, the content liquid filled in the metering chamber 18 circulates through the flow passage 16p of the working tube 16 of the metering / dispensing operation unit 17 by the contraction force of the diaphragm 25 itself. From the 16 horizontal holes 16y, the nozzles 13 pass through the communication holes 13p of the injection port 13 and are injected from the injection port at the tip of the injection port 13 to the outside.

In expansion / contraction of the diaphragm 25, the air circulation hole 28 provided in the inner surface of the side surface portion 17w of the quantitative distribution operation unit 17 contributes to the introduction and discharge of air from the outside.
As described above, a certain amount of the content liquid filled in the fixed quantity chamber 18 is ejected from the ejection port 13 of the main body 11 to the outside.

FIGS. 7A and 7B illustrate a lock member used in the quantitative injection mechanism according to the present invention, in which FIG. 7A is a side explanatory view in a mounted state, and FIG. 7B is a perspective explanatory view.
The lock member 24 can be used in common for both the first and second embodiments of the metering mechanism according to the present invention.

The lock member 24 is interposed between the guide portion 16 g located on the outer periphery of the passage 16 on the lower surface of the fixed amount distribution operation portion 17 and the step portion 11 d provided at the outer peripheral intermediate portion of the main body portion 11.
Thereby, it becomes impossible to press down the fixed quantity distribution operation part 17, a malfunction can be prevented, and the role of a virgin seal can also be fulfilled.

The lock member 24 includes a holding portion 24h that can hold the upper outer peripheral portion of the main body 11 and a gripping portion 24i that extends outward in the radial direction on the side opposite to the opening of the holding portion 24h. The
At the start of use, the connecting part 24r provided on the lower surface of the gripping part 24i can be removed by stripping off and the use can be started. After the start of use, the holding part 24h is placed on the outer periphery of the upper part of the main body part 11. It can be easily mounted and used repeatedly as a locking member.
A notch (open part) 24k between the holding parts 24h of the lock member 24 corresponds to the injection port part 13 of the main body part 11, and is held in the outer peripheral part of the upper part of the cylindrical shape of the main body part 11 without any problem. It can be held.

FIG. 8 is a longitudinal sectional view illustrating a third embodiment of the constant injection mechanism of the present invention.
FIG. 8 shows a non-operating state, and the basic point has the same configuration as that of the second embodiment.
That is, the difference between the quantitative injection mechanism 33 according to the third embodiment and the second embodiment is that the structure of the distal end of the working tube 16 provided at the center of the lower surface of the quantitative dispensing operation unit 17 and the working tube 16 This is the presence of a pair of seal members 35, 36 provided between the main body 11 and the passage 12 at the substantially central portion.

First, in the quantitative injection mechanism 33 according to the third embodiment, a distal end adapter 16s is provided at the distal end of the working tube 16 provided at the center of the lower surface of the quantitative distribution operation unit 17.
That is, the tip portion of the working tube 16 is divided into two parts.
A horizontal hole 16y is provided in the tip adapter 16s, and the horizontal hole 16y communicates with the communication hole 13p of the injection port 13 of the main body 11.

Furthermore, a cylindrical seal member 35 is interposed on the outer periphery of the working tube 16 and the tip adapter 16s,
A seal member 36 is also provided between the valve stem S and the passage 12 of the main body 11 below the tip adapter 16w.
That is, a pair of seal members 35 and 36 are provided symmetrically in the vertical direction.

The upper seal member 35 ensures liquid-tightness between the working tube 16 and the passage 12 of the main body portion 11, and the lower seal member 36 is a lower end portion of the working tube 16, the valve stem S and the main body portion 11. The liquid-tightness with the passage 12 is ensured.
Further, such a configuration is adopted because it contributes to the stabilization of the assembly.

The upper seal member 35 also has a function of holding the distal end adapter 16 s located at the distal end of the working tube 16 at the distal end portion of the working tube 16.
Further, in the third embodiment, a cylindrical upper adapter 16j having a flange at the upper end is also provided on the upper outer peripheral portion of the working tube 16, but the upper adapter 16j is not particularly provided. Is possible.
In this embodiment, the upper adapter 16j supports the upper end portion of the coil spring 14 that urges the quantitative dispensing operation portion 17 upward by the lower surface of the collar portion at the upper end portion thereof.

  FIG. 8 shows the non-operating state as described above, but when the quantitative dispensing operation unit 17 is pressed, the working tube 16 and the tip adapter 17 at the lower end are moved downward, and the horizontal hole 16y of the tip adapter 17 is moved. And the communication hole 13p of the injection rear part 13 of the main body part 11 is blocked and the valve stem S is pressed, so that the liquid content in the aerosol container passes through the flow passage 16p of the working tube 16 and the metering chamber in the diaphragm 25. A constant amount flows into 18 and then the hand is released to remove the pressing force, so that the quantitative dispensing operation unit 17 moves upward, and the contraction force of the diaphragm 25 causes the distal end adapter 16s of the lower end of the working tube 16 to move. The content liquid is jetted from the jet port 13 through the communication hole 13p from the horizontal hole 16y.

This operation procedure is the same as that of the second embodiment.
As described above, in the present invention, the configuration of the working tube 16 provided at the substantially central portion of the lower surface of the quantitative dispensing operation unit 17 may be a single article as in the second embodiment, or the tip adapter may be It may be composed of two added articles, and further may be a pair of seal members.

Although the embodiments have been described above, various design changes can be made within the scope of the claims in the present invention.
The injection mechanism according to the present invention includes a main body portion and a quantitative dispensing operation portion, and the dimensions of these portions can be appropriately designed as necessary.

The internal volume of the metering chamber, that is, the stroke of the reciprocating piston and the size or the internal volume of the head part of the metering / dispensing operation unit can be freely set.
The assembly of the main body part and the quantitative dispensing operation part and the attachment of the entire quantitative injection mechanism to the aerosol container are easy, and the structure of the attachment part can be freely changed in design.

In particular, as described above, the metering chamber disposed in the metering / dispensing operation unit can be formed by a reciprocating piston or a diaphragm.
The configuration of the working tube provided at the substantially central portion of the bottom surface of the fixed amount dispensing operation portion can also be formed separately at the tip portion at the lower end, and a pair of upper and lower shield members can be freely added.

Although not clearly shown in FIG. 8, the interval between the lower end surface of the tip adapter of the working tube and the upper end surface of the valve stem S is such that the lower end position of the upper shield member closes the opening of the communication hole of the injection port. With this distance, the communication hole is sealed before the valve stem is pressed down, and there is no possibility that the content liquid flows out to the injection port portion. It is preferable to adopt such a configuration.
The lock member can also be formed integrally with the main body.

  As described above, the present invention can discharge a certain amount of the content liquid in the aerosol container more accurately by adopting a relatively simple configuration, and the fixed amount can be made relatively large. It is possible to provide a fixed-quantity injection mechanism for an aerosol container that can be easily applied to the aerosol container.

10, 30, 33 Aerosol container quantitative injection mechanism 11 Main body part 11d Step part 11u Upper cylinder part 12 Passage 13 Injection port part 13p Communication hole 14, 19 Coil spring 16 Actuation pipe 16g Guide part 16p Flow path 16s Tip adapter 16t Bottom End face 16y Horizontal hole 17 Fixed dispensing operation section 18 Fixed chamber 20 Reciprocating piston 21 Flow pipe 21p Flow path 24 Lock member 24h Holding section 24i Grip section 25 Diaphragm 28, 29 Air flow hole 35, 36 Seal member C Aerosol container S Valve stem St Upper end face V Injection valve

Claims (6)

In the injection mechanism attached to the upper end of the aerosol container and connected to the valve stem extending upward from the upper end of the container,
This injection mechanism has a mounting portion attached to an aerosol container at its lower end, a main body portion having a vertical passage connected to the valve stem at a substantially central portion thereof, and an operation capable of reciprocating vertically in the passage. It consists of a quantitative dispensing operation unit with a tube on its lower surface,
An injection port part extending in a substantially horizontal direction is provided at an appropriate position of the passage of the main body part, and the valve stem can be pushed down by inserting an operation tube of the quantitative dispensing operation part into the passage.
When the quantitative dispensing operation part is in the non-operating state, a lateral hole provided in a direction intersecting with the flow passage inside the working pipe communicates with the communication hole of the injection port part, and the quantitative dispensing operation part is pressed down When in the operating state, the lateral hole is blocked from communicating with the communication hole of the injection port,
A quantitative chamber is provided in the upper part of the quantitative dispensing operation unit, and the flow path of the working pipe is connected to the quantitative chamber,
The quantitative chamber is provided with a volume expansion / contraction operation unit capable of expanding and contracting the volume of the quantitative chamber,
By pressing down the quantitative dispensing operation part, the working tube pushes down the valve stem, the lateral hole of the working tube is blocked, the content liquid enters the quantitative chamber, and its volume expands. When the pressing force applied to the quantitative dispensing operation unit is removed after the content liquid is filled, the working tube moves upward, the lateral hole of the working tube communicates with the communication hole of the injection port, and the volume expansion / contraction operation unit Due to the action, the content liquid in the quantitative chamber is jetted from the jet port of the main body to the outside world,
When the quantitative dispensing operation unit is in an inoperative state, a predetermined interval is provided between the lower end surface of the working tube provided on the lower surface of the quantitative dispensing operation unit and the upper end surface of the valve stem of the aerosol container,
A fixed-quantity injection mechanism for an aerosol container, wherein the interval length is larger than the vertical length of the communication hole of the injection port part through which the horizontal hole provided in the working tube communicates . The volume expansion / contraction operation unit is composed of a reciprocating piston provided in a quantitative chamber of the quantitative distribution operation unit,
A flow passage is provided in a substantially central portion of the reciprocating piston, the flow passage is fitted into the flow passage of the working tube, and the reciprocating piston is always urged upward by a resilient member,
As a result, when the metering / dispensing operation unit is pushed down, the working tube pushes down the valve stem, and the liquid in the aerosol container passes through the flow passage of the reciprocating piston from the flow passage of the working tube into the metering chamber. When the penetrating force is removed from the metering / dispensing operation unit, the content liquid is pushed out from the metering chamber to the ejection port of the main body by the upward biasing force to the reciprocating piston. The fixed-quantity injection mechanism of the aerosol container according to claim 1.   The volume expansion / contraction operation part is composed of a diaphragm, and this diaphragm is disposed at the upper end of the flow path of the operation pipe. By pressing down the metering / dispensing operation part, the content liquid in the container enters the inside of the diaphragm. When the diaphragm is expanded, the inside of the diaphragm constitutes a metering chamber, and when the pressing force is removed from the metering / dispensing operation unit, the content liquid is transferred from the metering chamber to the injection port of the main body by the contraction force of the diaphragm. The fixed-quantity injection mechanism of the aerosol container according to claim 1, wherein is extruded. A cylindrical seal member is provided between the outer periphery of the working tube and the passage inner wall of the main body,
Also, a cylindrical seal member is provided between the lower end of the working tube and the valve stem,
The pair of upper and lower seal members maintain liquid tightness between the outer periphery of the working tube and the inner wall of the passage of the main body, and maintain liquid tightness between the passage of the main body and the valve stem. The quantitative injection mechanism for an aerosol container according to any one of claims 1 to 3 . A locking member is provided between the main body and the quantitative dispensing operation unit. When the locking member is attached, pressing of the quantitative dispensing operation unit is prevented, and when the locking member is removed, the quantitative dispensing operation is performed. Determination injection mechanism of an aerosol container according to any one of claims 1 to 4 parts, characterized in that the possible depression. The lock member includes a holding portion that holds the outer peripheral portion of the passage in the vertical direction of the main body portion, and a grip portion that extends outward from an appropriate position of the holding portion, and is detachable from the outer peripheral portion of the passage. The fixed-quantity injection mechanism of the aerosol container according to claim 5 which can be equipped.