JP6592278B2 - Booster device for discharge container and injection device provided with the same - Google Patents

Description

  The present invention relates to a booster used in a discharge container having a stem, and an injection device having the same.

  Patent Document 1 discloses a dispenser pump that has a valve that is opened by pushing down an operating cylinder (actuating unit) and that increases the amount of ejected content per operation. In this dispenser pump, a fixed volume chamber is formed in the upper part of the container, thereby increasing the diameter of the cylinder forming the fixed volume chamber to form a large volume fixed volume chamber. A lever mechanism is employed as a booster mechanism that pushes down the operation cylinder (actuating portion).

Japanese Patent Laid-Open No. 5-229577

However, the dispenser pump of Patent Document 1 has a problem that the amplification of force is not sufficient and is difficult to operate.
An object of the present invention is to provide a booster that facilitates the operation of pushing down a stem of a discharge container and an injection device that includes the booster.

  A booster for a discharge container according to the present invention comprises a load part connected to an operating part of the discharge container, and an operation member attached to an upper part of the discharge container and pressing the load part downward. Are a cylindrical main body attached to the upper part of the discharge container, a first lever attached to the upper end opening of the main body so as to be rotatable up and down, and a second lever attached to the upper end opening of the main body so as to be rotatable up and down. A first fulcrum pivotally attached to the upper end opening of the main body, a first action point connected to the load part, the first action point, and a tip. The second lever includes a second fulcrum pivotally attached to the upper end opening of the main body, and a second action point connected to the first force point. , Provided between the second operating point and the tip, It is characterized by a second force point receiving. Here, the discharge container in the present invention refers to a container opened by operating the operating portion downward.

In the booster according to the present invention, it is preferable that the first force point and the second action point are connected by a link mechanism having each as a rotation axis. However, the first force point and the second action point may be connected by a cam mechanism.
The booster according to the present invention preferably has a return spring that returns the first lever rotated downward by the operation or returns the second lever rotated downward by the operation.
In the booster according to the present invention, it is preferable that the second fulcrum is above the first fulcrum.

The injection device of the present invention is characterized by including a pump-type discharge container having a stem and the booster of the present invention.
Such an injection device is preferably provided with a valve that opens at a predetermined pressure in the injection hole of the discharge container.

  A booster for a discharge container according to the present invention comprises a load part connected to an operating part of the discharge container, and an operation member attached to an upper part of the discharge container and pressing the load part downward. Are a cylindrical main body attached to the upper part of the discharge container, a first lever attached to the upper end opening of the main body so as to be rotatable up and down, and a second lever attached to the upper end opening of the main body so as to be rotatable up and down. A first fulcrum pivotally attached to the upper end opening of the main body, a first action point connected to the load part, the first action point, and a tip. The second lever includes a second fulcrum pivotally attached to the upper end opening of the main body, and a second action point connected to the first force point. , Provided between the second operating point and the tip, A second force point to be received, that is, a booster mechanism constituted by the first lever and a booster mechanism constituted by the second lever are connected in series, so that the stem of the discharge container is reduced in force. Can be pushed down.

In the booster according to the present invention, when the first force point and the second action point are connected by a link mechanism having the respective rotation axes, the first lever and the second lever are moved from the start to the end of the operation. Moves smoothly.
In the booster of the present invention, when the first force point and the second action point are connected by a cam mechanism, the force of the initial operation can be reduced.
When the booster of the present invention has a return spring for returning the first lever rotated downward by the operation or returning the second lever rotated downward by the operation, after use The return force of the first lever and the second lever can be reduced, or they return automatically.
In the booster of the present invention, when the second fulcrum is above the first fulcrum, the structure of the operation member is simple.

Since the injection device of the present invention includes the pump type discharge container provided with the stem and the booster of the present invention, the discharge container can be operated with a light operating force.
In the injection device according to the present invention, when the injection hole of the discharge container is provided with a valve that opens when a predetermined pressure is reached, the contents are formed in the discharge container or in the flow passage between the stem and the injection hole. Can be pressurized, and after the operation, a time difference can be given until a predetermined amount of the contents is ejected. Therefore, although it is a pump-type discharge container, the contents can be sprayed for a long time by a single operation.

It is a perspective view which shows one Embodiment of the injection apparatus of this invention. It is side surface sectional drawing which shows the discharge container of FIG. 3a to 3c are a perspective view, a rear view, and a side sectional view showing the booster of FIG. 1, respectively. FIG. 4a is a schematic diagram showing the moment of force immediately after operation of the booster of FIG. 1, and FIG. 4b is an enlarged view thereof. 5a to 5d are state diagrams showing operation steps of the injection device of FIG. It is side surface sectional drawing which shows other embodiment of the booster of this invention. FIG. 7a is a schematic diagram showing the moment of force immediately after operation of the booster of FIG. 6, FIG. 7b is an enlarged view thereof, and FIG. 7c is an enlarged view during operation. It is the schematic which shows other embodiment of the booster of this invention.

  1 includes a pump-type discharge container 11 and a booster 12 that opens and closes a valve of the discharge container 11. The booster 12 has a first lever 32 that constitutes a booster mechanism and a second lever 33 that constitutes a booster mechanism, and these two booster mechanisms are connected in series.

  As shown in FIG. 2, the discharge container 11 includes a container main body 16 that houses the contents C, and a pump member 17 that is attached to the opening.

  The container body 16 includes a cylindrical body portion 16a having a bottom, a tapered shoulder portion 16b whose diameter is reduced upward from the upper end thereof, a cylindrical neck portion 16c extending upward from the upper end thereof, and an upper end thereof. And a flange portion 16d of the container protruding outward in the radial direction. The container body 16 may be made of synthetic resin or metal.

  The pump member 17 includes a cylindrical housing 21 held in the opening of the container body 16, a check valve 22 attached to the lower end communication hole 21 c of the housing 21, and a plunger 23 that slides in the housing 21 in the vertical direction. And an injection button 24 provided at the upper end thereof.

The housing 21 has a cylindrical shape whose inner surface is a vertical surface, and is a cylinder that allows the piston 26 of the plunger 23 to slide up and down. A flange portion 21a of the pump projecting radially outward is formed at the upper end. And the lower end communication hole 21c is formed in the center of the bottom part 21b. In this embodiment, the lower end communication hole 21c includes an annular hole 21c1 provided with a plurality of holes in an annular shape, and a center hole 21c2 formed at the center thereof.
The outer surface of the housing 21 and the inner surface of the neck portion 16c are designed to be fitted to each other, but the container is provided so that the liquid content C does not leak and external air can be introduced into the container body 16. The main body 16 and the outside are configured to communicate with each other. A check valve may be provided between the outer surface of the housing 21 and the inner surface of the neck portion 16c.
The inner diameter of the housing 21 is 10 to 50 mm, particularly 15 to 40 mm. Its capacity is 5 to 50 ml, especially 10 to 40 ml.

  The check valve 22 is an elastic body including a disc-shaped valve body 22a and a connecting rod 22b extending downward from the center thereof. For example, it is molded from natural rubber, synthetic rubber or synthetic resin. The distal end of the connecting rod 22b is a locking protrusion 22b1 protruding outward in the radial direction. The locking projection 22b1 has a hook shape so that the outer diameter decreases toward the tip side. The outer diameter of the connecting rod 22b is smaller than the inner diameter of the center hole 21c2 of the lower end connecting hole 21c of the housing 21, and the outer diameter of the base portion of the locking projection 22b1 is larger than the inner diameter of the stop hole 21c2 of the lower end connecting hole 21c of the housing 21. That is, by inserting the connecting rod 22b of the check valve 22 into the center hole 21c2 of the housing 21, the check valve 22 has a bottom 21b between the valve main body 22a and the locking projection 22b1 of the connecting rod 22b. It arrange | positions so that it may interpose and is fixed to the lower end of the housing 21 so that a vertical movement is possible.

Because of this configuration, the check valve 22 moves toward the bottom of the housing 21 with respect to the flow from the housing 21 toward the container body 11, and the valve body 22a passes through the annular hole 21c1 and the center hole 21c2. Closed (state shown in FIGS. 1 and 5a to 5c). On the other hand, the check valve 22 moves away from the bottom of the housing 21 with respect to flow from the container body 11 to the housing 21, the valve body 22a opens the lower communication hole 21 c (see FIG. 5d).
The check valve is not particularly limited as long as it prevents the flow from the housing 21 to the container body 11 and allows the flow from the container body 11 to the housing 21. For example, it may be a check valve in which a valve body is urged to one opening. The lower end communication hole 21c of the housing 21 is a cylindrical hole that accommodates the valve element.

The plunger 23 includes a piston 26 that slides closely on the inner surface of the housing 21 and a stem 27 that extends upward from the upper surface thereof. At the center of the plunger 23 (piston 26 and stem 27), a center hole 23a is formed for communicating the contents storage chamber S with the outside. The piston 26 and the stem 27 are integrally formed, but may be separated as long as they are connected so as to move up and down.
The outer periphery of the piston 26 is a sliding portion 26 a that slides closely with the inner surface of the housing 21.
The stem 27 is a cylindrical body, and a connecting shaft 27a protruding in the left-right direction is formed on the side surface of the middle portion (see FIG. 1).
The inner diameter of the central hole 23a of the plunger 23 is preferably 0.3 to 5 mm, particularly preferably 0.5 to 3 mm. When the diameter of the center hole 23a is smaller than 0.3 mm, the flow path resistance becomes too large and it becomes difficult to discharge. If the diameter of the center hole 23a is larger than 5 mm, the content remaining in the center hole increases. The inner diameter of the center hole 23a of the plunger 23 is 1/10 to 1/50, particularly 1/15 to 1/40, of the inner diameter of the housing 21.

  The injection button 24 includes a stem engagement portion 24a into which the upper end of the stem 27 is inserted, an injection hole 24b, and an internal passage 24c that connects them. A pressure valve 25 that opens the injection hole 24b when a predetermined pressure is reached is provided in the enlarged diameter space at the tip of the internal passage 24c. The pressure valve 25 includes a diameter-enlarging chamber 25a provided on the downstream side of the internal passage 24c, a valve body 25b provided so as to be movable up and down in the diameter-enlarging chamber, and a spring that biases the valve body 25b upstream. 25c. Normally, the valve body 25b is urged by the upstream opening of the diameter expansion chamber 25a and closes the internal passage 24c. The opening pressure of the pressure valve 25 is preferably 0.1 to 0.35 MPa, particularly preferably 0.15 to 0.3 MPa.

In the pump-type discharge container 11 configured in this way, the piston 27 of the plunger 23 is lowered by lowering the stem 27 of the plunger 23 and the content storage chamber S is contracted. Due to this pressure, the content C in the content storage chamber S is sent to the injection button 24 through the center hole 23a of the plunger 23, is accumulated to a predetermined pressure in the injection button 24, and then sprayed from the injection hole 24b. Is done. Therefore, the content C is sprayed by the volume (quantitative) of the content storage chamber S.
In addition, since the pressure valve 25 is provided in the injection button 24 and the inner diameter of the injection passage of the stem 23 is reduced to increase the flow path resistance with respect to the cylinder (housing 21), the force of the operation force is applied to the discharge container. 11 is largely accumulated. For example, it is conceivable that the content is pressurized in the entire passage between the content storage chamber S and the injection hole 24b, or that the operation member (first lever and second lever) and the piston 26 are elastically deformed. Therefore, there is a time difference (substantial spraying time) from the completion of the pushing-down operation of the plunger 23 (substantially the start of spraying of the contents) to the end of spraying of the fixed contents C. Furthermore, by setting the volume (quantitative injection amount) of the content storage chamber S to 0.5 to 10 ml, particularly 1 to 5 ml, the time difference may be set to, for example, 1 to 15 seconds, preferably 2 to 10 seconds. it can. That is, a fixed amount of contents can be sprayed for a certain period of time with a single operation. Therefore, the user can spray the contents C widely in the space by one operation by gently shaking the discharge container 11 up and down and left and right in the operated state. The pressurization of the content C upstream from the injection hole 24b may be performed only by the pressure valve 25 or the flow path resistance. However, if the opening pressure of the pressure valve 25 is increased too much, the contents C may not be injected and may remain in the passage. On the other hand, if the opening pressure is too small, the spraying time cannot be gained. Therefore, a preferable spraying time can be obtained by providing the pressure valve 25 and the flow path resistance. The opening pressure of the pressure valve and the flow path resistance of the passage can be appropriately selected according to the spraying time.
When the pushed-down plunger 23 is restored by an external force, the content storage chamber S is depressurized because the introduction of air from the injection hole 24b is blocked by the pressure valve 25, and at the same time, the check valve 22 is opened. The contents C are supplied to the contents storage chamber S (see FIG. 5d). At this time, since the container main body 11 communicates with the outside, external air is introduced into the container main body, and the container main body 11 is not decompressed.

  As shown in FIGS. 3 a to 3 c, the booster 12 includes a connecting shaft (loading part) 27 a connected to a stem (acting part) 27 and an operation member 28 attached to the upper part of the discharge container 11. In this embodiment, the load portion of the booster and the operation portion of the discharge container are integrated, but may be separated as long as they are connected so as to interlock the vertical movement.

  The operation member 28 is a device that is attached to the upper part of the discharge container and presses the stem (actuating part) 27 downward via a connecting shaft (loading part) 27a. Specifically, a cylindrical main body 31 fixed to the upper part of the discharge container 11, and a rod-shaped first lever 32 that extends upward toward the center of the upper end opening of the main body 31 and is attached to be rotatable up and down. A rod-shaped second lever 33 that extends upward toward the center of the upper end opening of the main body 31 so as to face the first lever 32 with the center interposed therebetween, and is attached so as to be rotatable up and down, and a first lever 32 and a link member 34 that couples the second lever 33 to each other.

The inner surface of the main body 31 is formed with two grooves, an upper annular groove 31a with which the pump flange portion 21a is engaged and a lower annular groove 31b with which the container flange portion 16d is engaged (FIG. 3c). reference). A first shaft 31c of the first lever 32 is provided at the front portion of the main body 31 (left side in FIG. 3c). A support part 31d extending upward is provided at the rear part of the main body 31 (on the right side in FIG. 3c), and a second shaft 31e of the second lever 33 is provided at the upper end thereof. A plurality of reinforcing ribs 31d1 are provided above and below the support portion 31d (see FIG. 3b). Further, the main body 31 corresponding to both sides of the support portion 31d is formed with a lower spring receiver 31f that supports a return spring 35 that constantly biases the first lever 32 upward (see FIG. 3b).
Such a main body 31 is made of a synthetic resin such as polyacetal, polyethylene terephthalate, or polybutylene terephthalate. In this embodiment, the first half and the second half formed by injection molding or the like are combined and integrated.

The first lever 32 is a connection hole (first operation point) that rotatably receives a first bearing (first fulcrum) 32 a that receives the first shaft 31 c of the main body 31 and a connection shaft 27 a formed on the side surface of the stem 27. 32b and a lower link shaft (first force point) 32c that receives one of the axes of a link member 34 to be described later (see FIG. 3a). The link lower shaft 32 c receives a downward force of the second lever 33. Further, in the vicinity of the connection hole 32b of the first lever 32, an upper and lower through hole 32e through which the stem 27 passes vertically is formed. Furthermore, an upper spring receiver 32f that supports a return spring 35 that constantly biases the first lever 32 upward is provided at the lower end of the tip 32d. The upper surface 32d1 (see FIG. 3c) of the tip 32d is a plane substantially parallel to the axis of the first lever 32. However, the upper portion of the distal end portion 32d of the first lever is not particularly limited as long as it does not interfere with the second lever 33.
The length of the first lever 32 is such that the tip of the first lever 32 does not protrude from the main body 31 when the first lever 32 is fully pressed downward.
The first lever 32 is integrated with the right half and the left opposite so as to cover the first bearing 31c of the main body 31 and the support portion 31d of the main body 31 from both sides. In addition, the 1st lever 32 and the main body 31 should just be able to connect the base part of the 1st lever 32 so that rotation is possible, and a shaft and a bearing may be reverse.

The 2nd lever 33 consists of the 2nd lever main body 36 and the trigger 37 provided in the front-end | tip.
The second lever main body 36 includes a second bearing (second fulcrum) 36a that receives the second shaft 31e of the main body 31, and a link upper shaft (second working point) 36b that receives the other shaft of the link member 34 described later. has a through hole 36c through which the stem 24 up and down, and a tip portion 36d which trigger 3 7 (second force point) is connected. The outer shape of the base of the second lever main body 36 includes a curved portion 36e centered on a second bearing (second fulcrum) 36a, a lower surface 36f connected to the front end thereof, and parallel to the upper surface 32d1 of the first lever 32. , And a step portion 3 6 g provided at the front end thereof (see FIG. 3 c) . The lower surface 36f is provided to be parallel and slightly above the upper surface 32d1 of the tip 32d of the first lever 32 when the second lever 33 is most open. However, the outer diameter of the base portion of the second lever main body 36 is not particularly limited as long as it does not interfere with the first lever 32.
The second bearing (second fulcrum) 36 a is provided above the second bearing (first fulcrum) 32 a of the first lever 32 by the amount provided at the tip of the support portion 31 d of the main body 31. That is, the second lever 33 is provided above the first lever 32.
Link upper bearing 36b is provided on the proximal side from the center (the through-hole 3 6 c) of the second lever 33.
The through hole 36c is formed so that the stem 24 and the second lever 33 do not buffer even when the second lever 33 rotates.

The trigger 37 extends substantially perpendicularly to the axis of the second lever body 36 from the distal end portion 36 d of the second lever body 36.
The length of the second lever main body 36 and the angle of the trigger 37 are provided so that the trigger 37 is substantially parallel to the main body 31 when the second lever is pushed down (see FIG. 5c). Thereby, it is easy to apply force to the trigger 37 and to operate it easily. However, the shape of the trigger 37 is determined according to the overall size and / or the angle of the second lever body, and is appropriately selected so that the user can easily grasp it.

  The link member 34 has a flat plate shape, and is formed with a lower shaft hole 34a that receives the link lower shaft 32c of the first lever 32 and an upper shaft hole 34b that receives the link upper shaft 33b of the second lever. The link member 34 is integrally provided on the left and right sides so as to cover both sides of the first lever 32 and the second lever 33.

Next, a booster mechanism using the operation member 28 will be described.
First, as shown in FIG. 4a, the distance between the first bearing (first fulcrum) 32a of the first lever 32 and the coupling hole (first action point) 32b is X1, and the first bearing of the first lever 32 The distance between the (first fulcrum) 32a and the link lower shaft (first force point) 32c is X2 (X2> X1).
Further, the distance between the first bearing (second fulcrum) 33a of the second lever 33 and the upper link shaft (second working point) 33b is Y1, and the first bearing (second fulcrum) 33a of the second lever 33 is used. And Y2 is the distance between the tip of the trigger portion 37 (second force point) (Y2> Y1).
Then, as shown in FIG. 4b, a line connecting the lower shaft hole 34a of the link member 34 and the link upper shaft hole 34b is a link center line Z, and the first bearing (first fulcrum) 32a of the first lever 32 is linked to the link. A line perpendicular to the line X connecting the lower shaft (first force point) 32b is the first lever outer tangent line XP, the second bearing (second fulcrum) 33a of the second lever 33 and the link upper shaft 33b (second action). The line perpendicular to the line Y connecting the point Y ) is the second lever outer tangent line YP, the angle between the link center line Z and the first lever outer tangent line XP is α, the link center line Z and the second lever Let β be the angle between the external tangent line YP.

Since it is configured in this way, the booster mechanism operates as follows. That is, when the user applies F force to the trigger 37 so that the second lever 33 rotates, the booster mechanism by the second lever 33 operates, and the link upper shaft (the first lever 33) F1 force is applied to the (2 action point) 36b. The force F1 is applied to the link lower shaft (first force point) 32c of the first lever 32 as the force F2 via the link member 34. Furthermore, the booster mechanism by the 1st lever 32 act | operates, and the force of F3 is added to the connection hole (1st action point) 32b of the 1st lever 32. FIG. The following equations hold for these forces.
“Formula 1” F1 = Y2 / Y1 · F
“Formula 2” F2 = F1 · cosβcosα
"Formula 3" F3 = X2 / X1 / F2
“Formula 4” F3 = (Y2 · X2) / (Y1 · Y1) · F · cosβ · cosα
That is, the force of F applied to the trigger 37 is transmitted to the stem 27 as (Y2 · X2) / (Y1 · Y1) · cosβ · cosα times. Therefore, even when a large resistance is applied when the stem 27 is pushed down like the pump-type discharge container 11, the pushing operation of the stem 27 can be performed. Then, the lowered stem 27 is returned by the return spring 35 via the first lever 32.

  FIG. 5 shows the operating state of the injection device 10. In FIG. 5 a, the content storage chamber S is filled with a fixed content C before use. From this state, the trigger 37 is operated to rotate the second lever 33. Thereby, as described above, the operating force is amplified, the stem 27 is pushed down, and the content C in the content storage chamber S is sprayed from the injection button 24 (see FIG. 5b). When the trigger 37 (second lever 33) is pushed down, the trigger 37 comes into contact with the side surface of the main body 31 (see FIG. 5c). Even in this state, as described above, since the operating force accumulated by the flow path resistance of the pressure valve 25 and the center hole 23a is gradually released, the spraying of the contents C continues for a substantial spraying time. After the spraying is completed, when the force on the trigger 37 is released, the second lever 33 (and the first lever 32) is returned to the original position by the return spring 35, and at the same time, the check valve 22 is opened, and the container The content C in the main body 11 is supplied to the content storage chamber S, and the injection device 10 returns to the state of FIG.

In the booster 50 of FIG. 6, the first lever and the second lever of the operation member 51 are connected by a cam mechanism. Other configurations are substantially the same as those of the injection device 10 of FIG.
The operation member 51 has a cylindrical main body 31 fixed to the upper part of the discharge container 11 and a rod-shaped first lever that extends upward toward the center of the upper end opening of the main body 31 and is attached to be rotatable up and down. 52 and a rod-like second lever 53 that extends upward toward the center of the upper end opening of the main body 31 and is attached so as to be rotatable up and down so as to face the first lever 52 across the center. . The main body 31 is substantially the same as the injection device 10 of FIG.

  The first lever 52 is substantially the same as the first lever 32 of the injection device 10 of FIG. 1 except that it does not have a link lower shaft (first force point) 32c. However, the upper surface 32d1 of the tip end portion 32d is in direct contact with the second lever 53, and the first lever 52 acts as a first force point.

The second lever 53 is substantially the same as the second lever 33 of the injection device 10 of FIG. 1 except that it does not have a link upper shaft (second action point) 33b and the outer diameter of the base is different. It is.
The outer shape of the base of the second lever 53 includes a curved portion 53a centered on a second bearing (second fulcrum) 36a, and a lower surface 53b connected to the front end thereof and provided in parallel with the upper surface 32d1 of the first lever 53. , And a curved stepped portion 53c provided at the front end thereof. The stepped portion 53c is curved so that the distance from the second bearing (second fulcrum) 36a of the second lever 53 continuously increases toward the front.
Therefore, the second lever 53 has the lower surface 53b of the second lever main body 36 directly in contact with the upper surface 32d1 of the first lever 52, and the upper surface 32d1 becomes the step portion 53b (second action point) as the second lever 53 rotates. And the force of the second lever 53 is transmitted to the first lever 52. Further, by rotating the second lever 53, the stepped portion 53b slides on the upper surface 32d1, and a large force is gradually applied. By using the cam mechanism in this way, the initial operation force can be reduced. The stepped portion 53b may be a plurality of stepped portions that are gradually separated from the second bearing 36a.

Next, the booster mechanism of the operation member 51 will be described.
First, as shown in FIG. 7, the distance between the first bearing (first fulcrum) 32a of the first lever 52 and the connecting hole (first action point) 32b is X1, and the first bearing of the first lever 32 The distance between the (first fulcrum) 32a and the upper surface (first force point) 32d1 is defined as X2 ′ (X2 ′> X1).
Further, the distance between the first bearing (second fulcrum) 33a of the second lever 53 and the step portion (second working point) 36g is Y1 ', and the first bearing (second fulcrum) 33a of the second lever 53 is The distance between the tips (second force points) 32c of the trigger portion 37 is Y2 (Y2> Y1 ′). The numerical value Y1 ′ increases to Y1 ″ according to the rotation of the second lever 53 (see FIG. 7c).
A line perpendicular to the line Y ′ connecting the first bearing (second fulcrum) 33a of the second lever 53 and the step (second action point) 36g is defined as a second lever outer tangent line YP ′. A line perpendicular to a line X ′ connecting the first bearing (first fulcrum) 32a and the upper surface (first force point) 32d1 of the lever 32 is defined as a first lever outer tangent line XP ′, and a first lever outer tangent line YP ′. An angle between the first lever outer tangent line XP ′ is γ.

Since it is comprised in this way, the booster 50 acts as follows. That is, when a force F is applied to the trigger 37 and the second lever 53 is rotated, the booster mechanism by the second lever 33 is operated, and the step portion (second action point) 36g of the second lever 33 is F1. 'Power is added. The force F1 ′ is directly applied to the upper surface (first force point) 32d1 of the tip 32d of the second lever 53. The force F1 ′ is applied to the upper surface (first force point) 32d1 of the first lever 52 as the force F2 ′ via the cam mechanism. Furthermore, the booster mechanism by the 1st lever 52 act | operates, and the force of F3 'is added to the connection hole (1st action point) 32b of the 1st lever 52. FIG. The following equations hold for these forces.
“Formula 5” F1 ′ = Y2 / Y1 ′ · F
“Formula 6” F2 ′ = F1′cosγ
“Formula 7” F3 ′ = X2 ′ / X1 · F1 ′
“Expression 8” F3 ′ = (Y2 · X2 ′) / (Y1 ′ · Y1) · F · cosγ
That is, the force F applied to the trigger 37 is transmitted to the stem 27 as (Y2 · X2 ′) / (Y1 ′ · Y1) · cosγ times. Therefore, the pushing operation of the stem 27 is simple as in the injection device 10 of FIG.

  In the booster 60 of FIG. 8, the main body 62 of the operation member 61 does not have a support portion that supports the second lever 63, and the second fulcrum 63 a of the second lever 63 is connected to the first fulcrum 32 a of the first lever 32. It is provided at the same height. In this case, the action point 63 b of the second lever 63 is located below the force point 32 c of the first lever 32, and they are connected by the link member 34. That is, the point of action 63 b of the second lever 63 is connected so as to pull the force point 32 c of the first lever 32 via the link member 34. In this case as well, the same boosting effect as in the formulas 1 to 4 can be obtained.

  1, 6, and 8 are attached to a pump-type discharge container, but may be used for discharge containers having other structures in which a valve is opened by pushing down a stem. Examples of such a discharge container include an aerosol container.

DESCRIPTION OF SYMBOLS 10 Injection apparatus 11 Discharge container 12 Booster 16 Container main body 16a Body part 16b Shoulder part 16c Neck part 16d Container flange part 17 Pump member 21 Housing 21a Pump flange part 21b Bottom part 21c Lower end communication hole 21c1 Annular hole 21c2 Center hole 22 Reverse Stop valve 22a Valve body 22b Connecting rod 22b1 Locking projection 23 Plunger 23a Center hole 24 Injection button 24a Stem engagement portion 24b Injection hole 24c Internal passage 25 Pressure valve 25a Diameter expansion chamber
25b Valve body 25c Spring 26 Piston 26a Sliding part 27 Stem 27a Connecting shaft 28 Operating member 29 Trigger part 31 Main body 31a Upper annular groove 31b Lower annular groove 31c First axis 31d Support part 31d1 Reinforcement rib 31e Second axis 31f Lower spring Receiver 32 First lever 32a First bearing (first fulcrum)
32b Connecting hole (first action part)
32c Link lower shaft (first force point)
32d tip 32d1 top (top) of tip
32e Upper and lower through holes 32f Upper spring bearing 33 Second lever 34 Link member 34a Lower shaft hole 34b Upper shaft hole 35 Return spring 36 Second lever body 36a Second bearing (second fulcrum)
36b Link upper shaft (second working part)
36c Top and bottom through hole 36d Tip (second force point)
37 trigger 50 booster 51 operation member 52 first lever 53 second lever 60 booster 61 operation member 62 main body 63 second lever 63a second fulcrum 63b second action point

Claims (3)

A pump-type discharge container with a stem;
A booster that increases the force to operate the stem,
The discharge container has a pump member comprising a cylindrical housing, a piston slidably accommodated in the housing, and a stem extending upward from the upper surface of the piston,
A spray button is provided at the upper end of the stem,
The injection button is provided with a valve that opens the injection hole when a predetermined pressure is reached,
The booster comprises a connecting shaft connected to the middle side surface of the stem , and an operation member attached to the upper part of the discharge container and pressing the connecting shaft downward.
The operating member, a cylindrical body attached to the upper portion of the dispensing container, the front end is pivotably attached to the front end of the top opening of the body, a first lever Ru extending rearward, the rear end is the body the rear end of the upper opening rotatably mounted on the, and a second lever Ru extending forward,
A link member connecting the first lever and the second lever;
The first lever is provided at a rear end of a first fulcrum that is rotatably attached to the front end of the upper end opening of the main body, a first operating point that is connected to the connecting shaft, and is connected to the link member and a first force point that will be,
The second lever includes a second fulcrum pivotably attached to a rear end upper part of the upper end opening of the main body, a second action point connected to the first force point via the link member, and a front end . provided, have a second force point which receives an operating force,
Before the second lever is pushed down, the second action point is diagonally in front of the second fulcrum and diagonally in front of the first force point,
When Oshiki' the second lever, the second working point is Ru come under the second supporting point,
Injection device. 2. The injection device according to claim 1 , wherein the second lever includes a second lever main body and a trigger that extends substantially perpendicularly to an axis of the second lever main body portion from a tip portion thereof . 3. The injection device according to claim 1, further comprising: a return spring that returns the first lever that is rotated downward by the operation or returns the second lever that is rotated downward by the operation. 4.