JP2014159002A - Pump dispenser - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a trigger type pump dispenser capable of easily focusing on an object, efficiently transmitting finger force to a trigger portion, and obtaining strong jetting force.SOLUTION: A pump dispenser A which can be attached to a container B having a grip portion, includes: a housing portion 1 which has a cylinder portion 11 and a base portion 12; a piston structure body 2 slidable in the cylinder portion 11; a trigger portion 3 journaled at the housing portion 1 and positioned on an upper side; and a cap 4 for attaching the housing portion 1 to a mouth portion of the container B.

Description

  The present invention relates to a pump dispenser for efficiently injecting liquid contained in a container, and more particularly, can easily focus on an object and efficiently transmit finger force to a trigger unit. The present invention relates to a trigger type pump dispenser capable of obtaining a strong injection force.

Today, a pump dispenser is widely used as a device that vigorously injects liquid stored in a container.
The pump dispenser normally includes a piston and a cylinder. By moving the piston, pressure is applied to the cylinder and the liquid is ejected.
And this pump dispenser is divided roughly into several types by the method of driving a piston, for example, there is a trigger type pump dispenser of a type which pulls a trigger with four fingers, for example. (See Patent Document 1 and Patent Document 2).

In front of the trigger-type pump dispenser, an operating lever corresponding to the trigger is provided, and when this is gripped by hand and moved forward, the piston arranged in the left and right direction moves in conjunction with that, The hydraulic pressure in the cylinder increases.
As a result, the liquid is ejected vigorously from the nozzle.

JP 2008-229445 A JP 2012-176379 A JP 2010-184182 A

By the way, in the trigger type pump dispenser as described above, when pulling the trigger, the entire periphery of the trigger type pump dispenser must be grasped with the palm of the hand, and the trigger must be pulled in the lateral direction using at least several fingers.
For this reason, when a child with a small hand, a handicapped person with weak finger strength, or the like handles, the state of gripping the trigger becomes shallow, and it is difficult to put effort into it.
In addition, since four fingers (or, depending on the person, two or three fingers) are used and gripped by the entire hand, when a liquid agent or the like adheres to the periphery of the pump dispenser main body, there is a drawback that it adheres to the hand and becomes dirty.
In particular, the finger located below the nozzle is easily soiled.

In order to solve such a problem, the present inventor has developed a trigger-type pump dispenser that can be easily handled by children and the like with a structure in which the trigger and the handle can be grasped at the same time and the trigger is pushed down (patent) Reference 3).
This trigger-type pump dispenser has a structure in which a handle portion at the back is supported by four fingers, a thumb is attached to the trigger and pushed down, and a bendable flexible passage integrated with the piston portion and the piston portion. A piston structure having a part is used.
And this flexible channel | path part has a structure arrange | positioned by the curve | curve ahead with a loose curvature.

In this trigger type pump dispenser, since the bendable passage portion extends upward from the upper end of the piston portion, the root of the bendable passage portion becomes an obstacle, and the trigger cannot be directly connected to the piston portion.
Therefore, the trigger part does not push down the piston part directly, but adopts a structure that pushes down the piston part via a crank part having a unique shape.

Although this trigger type pump dispenser is easy to use and can be sprayed toward an object as if it has a handgun, it has the following problems.
The trigger part does not directly push down the piston part. As mentioned above, the crank part has a unique shape and pushes down the piston part through it, so the number of parts is one. It increases excessively and the transmission efficiency of the finger force is poor (that is, the transmission of force from the trigger portion to the piston portion is not efficient).
On the other hand, the trigger-type pump dispenser that can be used with a pistol in this way has a built-in pressure accumulation valve with a strong spraying power. In the case of metal, there are also disadvantages that are easily painful.

The present invention has been made against the background of the above technical problems.
That is, an object of the present invention is to provide a trigger-type pump dispenser that can easily focus on an object and can efficiently transmit a finger force to the trigger unit and obtain a strong injection force in the trigger-type pump dispenser. To do.

  The present inventor has intensively studied to solve the above problems, and finds that the above problems can be solved by providing a unique connecting structure in the connecting portion between the trigger portion and the piston portion, thereby completing the present invention. It came to.

  That is, the present invention is (1) a pump dispenser A that can be attached to a container B having a handle portion, and is slidable within the cylinder portion 11 and a housing portion 1 having a cylinder portion 11 and a base portion 12. The piston structure 2 is provided with a trigger part 3 pivotally attached to the housing part 1 and positioned on the upper side, and a cap 4 for attaching the housing part 1 to the mouth part of the container B. The piston structure 2 includes a piston part 21. And a flexible bendable passage portion 22 protruding from the upper end of the piston portion 21, and a pair of support pieces 23 extending upward from the upper end of the piston portion 21 along both sides of the bendable passage portion 22. It has a connection part with a pair of drooping pieces 31 formed in the trigger part 3 at the upper part, and pushes down the piston part 21 by pushing down the trigger part 3 and approaching the handle part. Adding pressure Sunda section 11 resides in a pump dispenser A for ejecting liquid from the nozzle portion of the above through flexible passage portion 22.

  The present invention also resides in (2) the pump dispenser A described in (1) above, wherein a U-shaped leaf spring body 12B for urging the trigger portion 3 upward is integrally formed with the housing portion 1.

  In the present invention (3), both side walls 12A standing from the base portion 12 of the housing part 1 are provided with fitting recesses K1, and the fitting recesses K1 are provided inside the side walls 32 of the trigger part 3. In the pump dispenser A described in the above (1), which is a pivotally mounted portion (fulcrum P1) by fitting the protruding portion T1.

  Further, the present invention resides in (4) the pump dispenser A according to the above (1), wherein a trigger lock 12C for locking the trigger portion 3 is hinged to the housing portion 1.

  Moreover, this invention is (5) and the pump dispenser A of the said (1) description with which the housing part 1 and the cap 4 are integrated.

  Moreover, this invention exists in the pump dispenser A of the said (1) description whose handle part is the through-hole part B1 formed in the container B (6).

  Moreover, this invention exists in the pump dispenser A of the said (1) description whose (7) and a handle part are the blade piece parts protruded by the container B.

  In addition, as long as the objective of this invention is met, the structure which combined said (1) to (7) suitably is also employable.

  The pump dispenser A according to the present invention is a pump dispenser A that can be attached to a container B having a handle portion, and includes a housing portion 1 having a cylinder portion 11 and a base portion 12, and a piston structure that is slidable in the cylinder portion 11. A body 2, a trigger portion 3 pivotally attached to the housing portion 1 and positioned on the upper side, and a cap 4 for attaching the housing portion 1 to the mouth of the container B, and the piston structure 2 includes a piston portion 21 and a flexible bendable passage portion 22 projecting from the upper end of the piston portion 21, and both sides of the bendable passage portion 22 from the upper end of the piston portion 21. 3 can be transmitted and a strong injection force can be obtained.

Even if the trigger portion 3 is pushed downward and the piston portion 21 is lowered, the flexible passage portion 22 is sandwiched between a pair of support pieces 23 extending upward from the piston portion 21, so that no lateral vibration occurs. .
In addition, since there is a space between the pair of hanging pieces 31 provided in the trigger portion 3, the degree of freedom increases and the flexible passage portion 22 can afford to escape upward.
Moreover, since the handle part is located under the trigger part 3, when pulling in the trigger part 3 in order to inject a liquid, it is easy to grasp and it is not necessary to grasp the pump dispenser A whole.

In addition, with 4 fingers (or 3 depending on the person) hooked on the handle part, you can attach the thumb on the trigger part 3 and simply push it down. Can be handled.
Further, since the finger is not located below the nozzle portion of the pump dispenser A, the liquid agent is difficult to adhere.

  Further, since the U-shaped leaf spring body 12B for urging the trigger portion 3 upward is integrally formed with the housing portion 1, a strong restoring force is obtained in the leaf spring body 12B, which is disposed in the liquid. It is not painful because it is not done.

A fitting recess K1 is provided in both side walls 12A standing up from the base 12 of the housing part 1, and a projection T1 provided inside the both side walls 32 of the trigger part 3 is fitted into the fitting recess K1. Therefore, since the pivot portion (fulcrum P1) is provided, the pivot portion is reliably supported.
Moreover, a pivoting part (fulcrum P1) and a connection part (action point P2) can be shortened, and an insulator ratio can also be enlarged.

  Since the trigger lock 12C for locking the trigger portion 3 is hinged to the housing portion 1, the trigger lock 12C of the trigger portion 3 can be locked simply by rotating, and safety is guaranteed.

  Since the housing part 1 and the cap 4 are integrated, the number of parts is reduced and the number of assembling steps is reduced.

  By using the through-hole part B1 formed in the container B as a handle part, or the blade piece part protruded by the container B, pump dispenser itself can be made compact.

FIG. 1 is an external view of the pump dispenser of this embodiment. FIG. 2 is a cross-sectional view of the pump dispenser of the present embodiment, showing a state before the trigger portion is pushed down. FIG. 3 is a cross-sectional view of the pump dispenser of the present embodiment, showing a state after the trigger portion is pushed down. FIG. 4 is a cross-sectional view of the pump dispenser of the present embodiment, showing a state where the trigger portion is locked by the trigger lock before being pushed down. FIG. 5 is a view showing the piston structure of the present embodiment, FIG. 5 (A) is a perspective view, and FIG. 5 (B) is a front view. FIG. 6 is a view showing the housing portion 1 of the present embodiment, FIG. 6 (A) is a perspective view, and FIG. 6 (B) is a front view. FIG. 7 is a view showing the trigger portion 3 of the present embodiment, FIG. 7A is a perspective view, and FIG. 7B is a cross-sectional view. FIG. 8 is a side view showing the pump dispenser A of the present embodiment attached to the container B.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings as necessary.
In the drawings, the same elements are denoted by the same reference numerals, and redundant description is omitted.
Further, the positional relationship such as up, down, left and right is based on the positional relationship shown in the drawings unless otherwise specified.
Further, the dimensional ratios in the drawings are not limited to the illustrated ratios.

FIG. 1 is an external view showing a pump dispenser A of the present embodiment.
The pump dispenser A of this embodiment is used by being mounted on a container B provided with a handle.
Specifically, the handle portion of the container B (see FIG. 8) is gripped and the thumb is attached to the trigger portion 3 of the pump dispenser A.
In addition, the handle part of FIG. 8 shows the through-hole part B1 formed in the container B.

And if the trigger part 3 is pushed down with a thumb, the liquid accommodated in the cylinder part will receive a pressure, and will be ejected from the flexible channel | path part 22 through a nozzle part.
The finger force can be efficiently contributed to the lowering force of the trigger portion 3, and a stronger injection force can be obtained.

  FIG. 2 is a cross-sectional view of the pump dispenser A of the present embodiment, showing a state before the trigger portion 3 is pushed down. FIG. 3 is a cross-sectional view of the pump dispenser A of the present embodiment, and the trigger portion 3 Shows the state after is pushed down.

  FIG. 4 is a cross-sectional view of the pump dispenser A of the present embodiment, showing a state where the trigger portion 3 is locked.

  As shown in FIGS. 2 to 4, the pump dispenser A includes a piston structure 2, a cylinder part 11, a trigger part 3, a housing part 1, a cap 4, and a nozzle part 5.

The housing part 1 integrally includes a cylinder part 11 and a base part 12 formed in an enlarged shape above the cylinder part 11.
A U-shaped leaf spring portion 12B for returning the trigger portion 3 on the upper side of the housing portion 1 is integrated with the housing portion 1 (specifically, the base portion 12).

  Also, two valves are provided to open and close the liquid flow path, one of which is a first valve FV positioned below, and the other is a second valve SV positioned above it.

The cylinder portion 11 integrated with the housing portion 1 is formed in a multistage cylindrical shape having different diameters, and has a large diameter portion 11A and a small diameter portion 11B. The large diameter portion 11A of the cylinder portion 11 is provided. Inside, the piston portion 21 of the piston structure 2 slides in the vertical direction.
As will be described later, the piston structure 2 includes a piston portion 21 and a flexible flexible passage portion 22 that extends upward from the piston portion 21 and is integrated.

The bendable passage portion 22 is bent forward with a relatively gentle curvature, and the tip portion is fitted into the housing portion 1 and attached.
A nozzle portion 5 is attached to the distal end of the flexible passage portion 22 by press-fitting, and a spinner 6 is provided between the nozzle portion 5 and the distal end of the flexible passage portion 22.

A valve case 7 is attached to the piston portion 21 of the piston structure 2, and a second valve SV is attached to the valve case 7.
The second valve SV is a pressure accumulation type valve.

  The valve case 7 can be easily attached to the piston portion 21 by simply pushing the valve case 7 into the piston portion 21 from below with the pressure accumulating valve built into the valve case 7.

On the other hand, although the trigger part 3 is pivotally attached to the housing part 1, it is located above the housing part 1 and is disposed so as to cover the housing part 1 from above.
The trigger portion 3 is connected to the piston structure 2 (consisting of a piston portion 21, a flexible passage portion 22, and a support piece 23).

The piston structure 2 includes a pair of support pieces 23 extending upward along both sides of the bendable passage portion 22 from the upper end of the piston portion, and a pair of hanging pieces 31 formed on the trigger portion 3 on the support pieces 23. (Refer to FIG. 2).
Specifically, this connecting portion is fitted between the protrusion T2 provided on the outside of the pair of support pieces 23 of the piston portion 21 and the fitting recess K2 provided on the pair of hanging pieces 31 formed on the trigger portion 3. Composed of

  Further, fitting recesses K1 are provided in both side walls 12A standing from the base 12 of the housing part 1 (see FIG. 6), and the fitting recesses K1 are provided inside the side walls 32 of the trigger part 3. By fitting the protrusion T1 (see FIG. 7), the pivoting portion (fulcrum P1) is configured.

In this case, the pivoting portion (fulcrum P1) is reliably supported, and the trigger portion 3 can be pivoted in the vertical direction with the pivoting portion (fulcrum P1) as a fulcrum.
Here, when the relationship between the pivot part (fulcrum P1) and the action point P2 is seen, the action point P2 is in the extension of the axial center of the piston, and the pivot part (fulcrum P1) is located at a position near the front (cylinder). Near the upper extension line of the outer periphery of the part 11.
Because of this structure, the distance between the pivot part (fulcrum P1) and the action point P2 is shortened, and when the position where the thumb is applied to the trigger part 3 (force point P3) is pushed downward, the lever ratio is sufficient. It can be taken greatly.

It has a very useful structure for those having a pressure accumulating valve as in the present invention and requiring a strong pressing force.
Incidentally, as shown in FIG. 4, a trigger lock 12 </ b> C is hinged to the housing portion 1 for safety so that the trigger portion 3 does not fall.
Therefore, when necessary, the trigger lock 12C is easily raised and hooked on the downward projecting portion 33 of the trigger portion 3.

On the other hand, the cap 4 is for attaching the pump dispenser A to the container B, and is attached to the mouth of the container B by, for example, screwing or the like.
A hook portion is formed inward on the upper end portion of the cap 4, and is engaged with a rib formed on the outer periphery of the cylinder portion 11.

That is, the container B main body, the cylinder part 11, and the cap 4 are attached to each other by attaching the cap 4 to the mouth of the container B main body from above.
The cap 4 can also be integrally formed with the housing part 1, but the nozzle part needs to be positioned so as to face the front.

Next, the operation of the pump dispenser A will be described.
When the handle part provided in the container B and the trigger part 3 of the pump dispenser A are gripped and the trigger part 3 is pushed down, the piston part 21 also moves downward accordingly, and the liquid in the cylinder part 11 Pressure increases.

The piston portion 21 moves downward by the cooperative action of the handle portion of the container B and the trigger portion 3 of the pump dispenser A.
Here, even if the trigger portion 3 is pushed down and the piston portion 21 is lowered, the flexible passage portion 22 is sandwiched between a pair of support pieces 23 extending upward from the piston portion 21, so that lateral vibration occurs. Absent.

In addition, since there is a space between the pair of hanging pieces 31 provided in the trigger portion 3, the degree of freedom increases and the flexible passage portion 22 can afford to escape upward.
When the hydraulic pressure in the cylinder portion 11 increases and reaches a predetermined pressure, the second valve SV that is a pressure accumulating valve opens, and the cylinder portion 11 and the flexible passage portion 22 communicate with each other.
Therefore, the liquid flows out from the cylinder portion 11 to the bendable passage portion 22 and is ejected from the nozzle portion at the end of the bendable passage portion 22.

  In this case, even if the piston part 21 moves downward, the bendable passage part 22 bends and absorbs the vertical movement of the piston part 21, so that it is not affected at all by the movement of the trigger part 3, and the nozzle part does not move. In place.

Even if the trigger part 3 moves up and down, the position of the nozzle opening does not change, so that the direction can be accurately determined.
The trigger portion 3 is pushed down and comes into contact with a part of the housing portion 1 and stops. This position is the bottom dead center of the trigger portion 3.

Next, when the hand is released and the pressing force from the trigger portion 3 is released, the piston portion 21 is lifted by the return force to return to the original position while the second valve SV is closed.
Therefore, the pressure in the cylinder part 11 is reduced, the first valve FV is opened, the liquid in the container is sucked up, and enters the cylinder part 11.

Such a return of the trigger portion 3 to the upper side is performed by a U-shaped leaf spring body 12B formed integrally with the housing portion 1.
In this case, since it is plate-shaped, it is easy to be molded integrally with the housing part 1, and unlike the coil spring, it is easy to strengthen the spring force, and since it is not disposed in the cylinder liquid, it is less painful.

By this leaf spring body 12B, an upward biasing force is always applied to the trigger portion 3, and even if the thumb is placed on the trigger portion 3 and pushed down, the trigger portion 3 naturally returns to its original position when the thumb is removed.
In addition, since the liquid in the container B body is reduced, the inside of the container B body becomes negative pressure and a dent or the like is generated in the container B. The pump dispenser A is provided with a negative pressure eliminating means (not shown) for solving this. Yes.

Although the present invention has been described above by taking the embodiment as an example, the present invention is not limited to the above-described embodiment, and various modifications can be made.
For example, in the pivot joint part of the housing part 1 with the trigger part 3, the protrusion part may be provided on the housing part side, and the fitting concave part may be provided on the trigger part side.
Moreover, although the handle part shown in FIG. 8 showed the case of the through-hole part, not only a through-hole part but the thing which protrudes greatly from a part of container B as a blade piece part will be employ | adopted if it can grip It is also possible to do.
Further, by attaching a known orifice or former to the tip of the nozzle portion 5, the liquid can be sprayed in the form of a mist or foam.

Since the present invention can efficiently transmit the finger force to the trigger portion 3, there is a great merit that the injection force can be increased.
Therefore, as long as the fluid ejection principle of the present invention is used, the present invention can be widely applied not only to household items but also to industrial fields such as painting as a business use, or medical instruments.

DESCRIPTION OF SYMBOLS 1 ... Housing part 11 ... Cylinder part 11A ... Large diameter part 11B ... Small diameter part 12 ... Base part 12A ... Side wall 12B ... Leaf spring body 12C ... Trigger lock 21 ... Piston part 22 ... flexible passage part 23 ... support piece 3 ... trigger part 31 ... hanging piece 32 ... side wall 33 ... downward projecting part 4 ... cap 5 ... nozzle Part 6 ... Spinner 7 ... Valve case A ... Pump dispenser B ... Container B1 ... Handle part (through-hole part)
K1, K2 ... fitting recess T1, T2 ... projection

Claims (7)

A pump dispenser attachable to a container having a handle,
A housing portion having a cylinder portion and a base portion;
A piston structure slidable in the cylinder part;
A trigger part pivotally attached to the housing part and positioned on the upper side;
A cap for attaching the housing part to the mouth of the container;
The piston structure includes a piston portion, a flexible bendable passage portion protruding from the upper end of the piston portion, and a pair of support pieces extending upward from both ends of the bendable passage portion from the upper end of the piston portion. It has a connection part with a pair of drooping pieces formed on the trigger part at the top of the
A pump dispenser characterized in that by pushing down the trigger portion and approaching the handle portion, the piston portion is pushed down to apply pressure into the cylinder portion and to inject liquid from the nozzle portion ahead through the flexible passage portion.   2. A pump dispenser according to claim 1, wherein a U-shaped leaf spring body for biasing the trigger portion upward is integrally formed with the housing portion.   Fitting recesses are provided on both side walls that stand up from the base of the housing portion, and projections provided on the inner sides of the both side walls of the trigger portion are fitted into the fitting recesses, thereby pivoting portions (fulcrum points P1). The pump dispenser according to claim 1, wherein   2. The pump dispenser according to claim 1, wherein a trigger lock for locking the trigger portion is hinged to the housing portion.   The pump dispenser according to claim 1, wherein the housing part and the cap are integrated.   The pump dispenser according to claim 1, wherein the handle is a through-hole formed in the container.   2. The pump dispenser according to claim 1, wherein the handle is a blade piece protruding from the container.

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