JP5274289B2 - Pump dispenser - Google Patents

Abstract

Provided is a trigger-type pump dispenser wherein sway of a piston portion can be prevented, and a sliding resistance is small. A pump dispenser (A) capable of being attached to a container, the dispenser comprising a cylinder portion (2), a piston structure (1) slidably movable within the cylinder portion, a housing portion (5) mounted on the cylinder portion (2), a handle portion (5A) integrally formed with the housing portion (5), a lever portion pivot-fitted to the housing portion (5) and connected to the piston structure (1) through a crank portion (3), and a cap for attaching the cylinder portion (2) to a container body, wherein the piston structure (1) is formed by incorporating a bendable longitudinal nozzle portion (12) and a piston portion (11), so that when the lever portion is pulled down toward the handle portion (5A), the piston portion (11) is pulled down through the crank portion (3) to apply a pressure in the cylinder portion and discharge liquid through the longitudinal nozzle portion (12).

Description

  The present invention relates to a pump dispenser for discharging liquid contained in a container attached to the container.

Today, a pump dispenser is known as an instrument that vigorously discharges liquid contained in a container.
The pump dispenser usually includes a piston and a cylinder, and by moving the piston, pressure is applied to the cylinder and the liquid is discharged.
And this pump dispenser is divided roughly into several types by the way of driving a piston, and there is a trigger type pump dispenser. (See Patent Document 1).

The trigger type pump dispenser has an operating lever on the front side that corresponds to the trigger.When you hold it with your hand and move it to the front, the piston moves in conjunction with this, and the hydraulic pressure in the cylinder is reduced. Rise.
As a result, the liquid is ejected vigorously from the nozzle.

JP-A-53-36714 Japanese Patent Application No. 2007-262758

By the way, in this trigger type pump dispenser, since the nozzle and the piston are integrated, when the trigger is gripped, the nozzle also moves downward together with the movement of the piston.
Therefore, the trigger type pump dispenser has a problem that the liquid cannot be accurately discharged to a target location.

Further, when pulling the trigger of the trigger type pump dispenser, it is necessary to grasp the entire periphery of the trigger type pump dispenser.
Therefore, when a child with a small hand or the like handles, the state of gripping the trigger becomes shallow, and it becomes difficult to put power.
Since four fingers (or three depending on the person) are used and the gripping force of the entire hand is used, if a liquid agent or the like adheres to the periphery of the pump dispenser body, it adheres to the hand and becomes dirty.
In order to solve such a problem, the present inventor has a structure in which both the trigger and the handle are provided at the rear of the housing portion so that the trigger and the handle can be grasped at the same time, and the position of the nozzle does not move up and down. A trigger-type pump dispenser that can be easily handled by small people has been developed (see Patent Document 2).
However, although this trigger type pump dispenser is certainly excellent, the structure in which the nozzle part is incorporated in the cylinder part is complicated. Further, since the trigger part is directly attached to the piston part, the piston part inevitably swings left and right and the sliding resistance tends to increase.

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 does not sway the piston portion and has a low sliding resistance. It is another object of the present invention to provide a pump dispenser in which the position of the nozzle does not move up and down when the liquid is discharged and can be easily handled by a person with a small hand.

  The present inventors diligently studied to solve the above-mentioned problem. The present invention has been found and the present invention has been completed.

  That is, the present invention provides (1) a pump dispenser that can be attached to a container, and includes a cylinder portion, a piston structure that is slidable in the cylinder portion, a housing portion that is mounted on the cylinder portion, and a housing A piston structure, a handle portion integrally formed with the housing portion, a lever portion pivotally attached to the housing portion and connected to the piston structure via the crank portion, and a cap for attaching the cylinder portion to the container body. The body is composed of a flexible long nozzle part and a piston part. By pulling down the lever part and approaching the handle part, the piston part is pulled down via the crank part and pressure is applied to the cylinder part. It exists in the pump dispenser which discharges a liquid through a long nozzle part.

  The present invention also resides in (2) the pump dispenser according to the above (1), wherein one end of the crank portion is pivotally attached to the piston portion and the other end is pivotally attached to the lever portion.

  Moreover, this invention exists in the pump dispenser of the said (1) description with which the handle part is integrally formed in the housing part (3).

  The present invention is also the pump according to (2) or (3), wherein the lever portion includes a safety piece at the tip thereof via a hinge portion, and the safety piece can be hooked to the handle portion. Be in the dispenser.

The present invention also resides in (5) the pump dispenser described in (4) above, wherein the second valve SV is provided in a valve case portion that can be mounted in the piston.

  The pump according to (5), wherein the handle is provided so that the handle portion is positioned directly below the lever portion, and the lever portion is brought into contact with the handle portion to stop the pulling down. Be in the dispenser.

  Moreover, this invention exists in the pump dispenser of said (1) description to which the spring for urging | biasing a piston upwards is mounted | worn between the cylinder and the piston part.

  Moreover, this invention is (8), The pump dispenser of the said (1) description by which the handle part is integrally formed in the container instead of the housing part.

  In addition, as long as the objective of this invention is met, the structure which combined said (1) to (8) suitably is also employable.

The pump dispenser of the present invention includes a cylinder portion, a piston structure slidable in the cylinder portion, a housing portion attached to the cylinder portion, a handle portion formed integrally with the housing portion, and a pivot on the housing portion. A trigger part that is attached to the piston structure via a crank part, and a cap for attaching the cylinder part to the container body, and the piston structure has a flexible long nozzle part and a piston part. Since it is integrated, the trigger part is pulled down and brought close to the handle part, the piston part is pulled down via the crank part, pressure is applied to the cylinder part, and liquid is discharged through the long nozzle part. The horizontal movement of the part is prevented.
As a result, the sliding resistance of the piston with respect to the cylinder portion is greatly reduced.
Further, even if the piston part is moved up and down, the position of the discharge port does not change.
As a result, the pump dispenser of the present invention can discharge the liquid stored in the container toward the target location with high accuracy.

FIG. 1 is an external view of a pump dispenser attached to the container of the present embodiment. FIG. 2A is a front view of the pump dispenser of the present embodiment. FIG. 2B is a left side view of the pump dispenser of the present embodiment. FIG. 2C is a right side view of the pump dispenser of the present embodiment. FIG. 2D is a plan view of the pump dispenser of the present embodiment. FIG. 3A is a cross-sectional view of the pump dispenser of the present embodiment, showing a state before the trigger portion is pushed down. FIG. 3B is a cross-sectional view of the pump dispenser of the present embodiment and shows 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 pushed down and locked. FIG. 5 is an external view of a pump dispenser attached to a container having a handle portion of the present embodiment.

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 of the pump dispenser of the present invention attached to a container.
As shown in FIG. 1, the pump dispenser A of the present embodiment can be used with the handle portion 5 </ b> A gripped and the thumb attached to the trigger portion 4.
And if the trigger part 4 is simply pushed down with a thumb, the liquid accommodated in the cylinder part 2 will receive a pressure, and will be discharged from the elongate nozzle part 12. FIG.

  FIG. 2 is a pump dispenser of this embodiment, FIG. 2 (A) is a front view, FIG. 2 (B) is a left side view, FIG. 2 (C) is a right side view, and FIG. 2 (D) is a plan view. It is.

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

FIG. 4 is a view showing a state where the safety piece at the tip of the trigger part of the pump dispenser is hooked to the handle part (locked state).
As shown in FIGS. 3 and 4, the pump dispenser A includes a piston structure 1, a cylinder part 2, a crank part 3, a trigger part 4, a housing part 5, and a cap 6.
The housing part 5 is integrally attached with a handle part 5A.
In addition, a spring 7 for returning the trigger portion 4 and two valves for opening and closing the liquid flow path are provided.
One of the valves is a first valve FV positioned below, and the other is a second valve SV positioned above it.

First, the cylinder portion 2 is formed in a multi-stage cylindrical shape having different diameters, and includes a large-diameter portion 21 with ribs and a small-diameter portion 22.
The piston structure 1 slides up and down in the large diameter portion 21 of the cylinder portion 2.
The piston structure 1 includes a piston portion 11 and a flexible long nozzle portion 12 that extends from the piston portion 11 and is integrated.
A valve case 1A is attached to the piston portion 11 of the piston structure 1, and a second valve SV is attached to the valve case 1A.
Further, a lateral hole 1A1 is formed in the valve case 1A.

The valve case 1A can be easily attached to the piston part 11 simply by pushing the valve case 1A (with the second valve SV) into the piston part 11 from below.
Between the valve case 1A and the cylinder part 2 (specifically, the shoulder part of the cylinder part 2), a spring 7 for biasing the cylinder part 2 upward is mounted.
In this case, since the upper end of the spring 7 is in contact with the thick part of the valve case 1A and pushed upward, the valve case 1A cannot be removed.

A trigger portion 4 (which is pivotally attached to a housing portion 5 which will be described later) is connected to a piston structure 1 (consisting of a piston portion 11 and a long nozzle portion 12) via a crank portion 3.
That is, one end of the crank portion 3 is pivotally attached to the piston portion 11 (pivot attachment portion P2), and the other end is pivotally attached to the trigger portion 4 (pivot attachment portion P3).
Specifically, the shaft portion 11A protrudes from the upper portion of the piston portion 11 (near the boundary portion with the long nozzle portion 12), and the lower end portion 32 of the crank portion 3 is supported by the shaft portion 11A.
A conical protrusion 31 is formed at the upper end of the crank portion 3, and the cylindrical receiving portion 41 of the trigger portion 4 is supported by the protrusion 31.

A housing portion 5 is attached to the cylinder portion 2.
Specifically, the housing part 5 has a cylindrical base part 5 </ b> B in the center, and the cylindrical base part 5 </ b> B is attached to the outside of the cylinder part 2.

In addition, a trigger portion 4 is pivotally attached to the housing portion 5, and the trigger portion 4 can be rotated in the vertical direction starting from the pivot attachment portion (the pivot attachment portion P <b> 1).
Specifically, a shaft portion 42 is formed at the tip of the trigger portion 4, and the shaft portion 42 is inserted into a hole portion (not shown) formed in the housing portion 5.
Because of such a structure, even if the other end pivotally attached to the trigger portion 4 of the crank portion 3 is shaken, it is absorbed by the one end pivotally attached to the cylinder portion 2 and the piston portion 11 itself is hardly shaken. I don't get up.
The sliding resistance of the piston part 11 with respect to the cylinder part 2 is greatly reduced.

On the other hand, the cap 6 is for attaching the pump dispenser A to the container B, and is attached to the container B by, for example, screwing or the like.
A hook portion is formed inward on the upper end portion of the cap 6, and a rib that is hooked on the hook portion is formed on the cylinder portion 2.
That is, the container main body, the cylinder part 2 and the cap 6 are attached to each other by attaching the cap 6 to the mouth of the container main body from above.

A handle portion 5A for easily holding the pump dispenser A in cooperation with the trigger portion 4 is integrally formed on the cylindrical base portion 5B of the housing portion 5.
The handle portion 5A has an L shape, and is formed on the same side as the trigger portion 4, that is, on the rear side of the cylindrical base portion 5B, directly below the trigger portion 4.
Therefore, it is possible to place the thumb on the trigger portion 4 while holding the handle portion 5A. When pulling in the trigger, it is only necessary to attach the thumb from the top of the trigger portion while pushing four fingers (or three depending on the person) to the handle portion 5A and simply push it down.
There is no need to hold the entire pump dispenser.
The trigger portion 4 can be easily operated using the handle portion 5A, and children with small hands can be easily handled.
Moreover, since the housing part 5 is united with the handle part 5A, the handle becomes strong.

When the trigger part 4 is pulled down and rotated, the trigger part 4 is stopped by contacting a part of the handle part 5A [FIG. 3 (B)].
The trigger portion 4 is rotated upward for return, but when the trigger portion 4 abuts against a stopper portion (not shown) formed in the housing portion 5, the upward rotation is stopped and becomes an upper limit.
By the way, the trigger part 4 for pulling down the piston structure 1 is provided with a safety piece 4A at its tip via a hinge part.

The safety piece 4A is provided with a locking claw 4A1 at its tip, and the locking claw 4A1 is locked to the receiving claw 5A1 formed on the bottom of the handle 5A, so that the safety piece 4A is hooked to the handle 5A. It is possible. When hooked, the trigger part 4 stays in a state of being accommodated in the handle part (C-shaped cross section) 5A.
The trigger part 4 is safe because it does not protrude larger than the pump dispenser A itself, and space is reduced in storage and transportation.
In this housed state, the trigger unit 4 is located slightly below the bottom dead center.

Next, the operation of the pump dispenser A will be described.
As described above, when the trigger portion 4 is pushed downward by grasping the handle portion 5A and the trigger portion 4, the piston portion 11 is also moved downward, and the hydraulic pressure in the cylinder portion 2 is increased. .

When the hydraulic pressure in the cylinder part 2 increases, the second valve SV opens and the cylinder part 2 and the long nozzle part 12 communicate with each other.
Therefore, the liquid flows out from the cylinder portion 2 to the long nozzle portion 12 and is discharged from the tip of the long nozzle portion 12.
In this case, even if the piston part 1 moves downward, the long nozzle part 12 bends and absorbs the vertical movement of the piston part 1, so the nozzle port 12A does not move and is in a fixed position.
When the piston portion 11 is lowered and the valve case 1A enters the small diameter portion 22 of the cylinder portion 2, the small diameter portion 22 is sealed at the bottom surface of the valve case 1A.
In this state, since the liquid passage is blocked, liquid leakage from the nozzle port 12A is prevented even if the second valve SV is opened for some reason such as an impact.

Moreover, it is prevented that air enters the cylinder part 2 and the container main body from the long nozzle part 12.
The trigger part 4 is pushed down and comes into contact with the bottom between the side walls of the handle part 5A and stops, but this position is the bottom dead center of the trigger part 4 (see FIG. 3B).

Further, when the hand is released and the pressing force from the trigger portion 4 is released, the piston portion 11 is lifted by the return force of the spring 7 and returns to the original position with the second valve SV closed.
Therefore, the pressure in the cylinder part 2 decreases, the first valve FV is opened, the liquid in the container body is sucked up, and enters the cylinder part 2.
The trigger part 4 is returned upward by a spring 7 mounted between the cylinder part 2 and the piston part 11.

The spring 7 always applies an upward biasing force to the trigger portion 4, and even if the trigger portion 4 is put on the thumb and pushed down, the trigger portion 4 naturally returns to its original position when the thumb is removed.
As described above, the trigger portion 4 is housed between the side walls of the handle portion 5A at the bottom dead center (see FIG. 3B).
Therefore, since the trigger part 4 moves up and down along the side wall of the handle part 5A in the latter half of the movement, the trigger part 4 does not shake laterally and can move stably.
Since the liquid in the container body decreases, the container body becomes negative pressure and a dent or the like is generated in the container. The pump dispenser A is provided with a negative pressure eliminating means (not shown) for solving this.

As described above, in the present invention, the long nozzle portion 12 is different from the conventional pump dispenser, and the piston portion 11 can be bent, so that the nozzle opening 12A is not affected at all by the movement of the trigger portion 4 and is constant. Can be in the position.
Even if the trigger part 4 moves up and down, the position of the nozzle opening 12A does not change, so that the direction can be accurately determined.
Moreover, since the long nozzle part 12 which can be bent absorbs the vertical movement of the piston part 11, the movement of the long nozzle part itself is small.
For this reason, since there is no moving object in the space above the cylinder part 2, a sufficient space can be secured and the movement of the crank part 3 is not hindered.

Since the trigger part 4 is indirectly connected to the piston structure 1 via the crank part 3, the piston part 11 is unlikely to sway.
Since the handle portion 5A is located below the trigger portion 4, when the trigger is pulled in to discharge the liquid, it is easy to grasp and there is no need to grasp the entire pump dispenser A.
As shown in FIG. 1, it is only necessary to place the thumb on the trigger portion 4 with four fingers (or three depending on the person) hooked on the handle portion 5A and push it down downward.
Therefore, children with small hands can be handled easily.
Furthermore, even when the liquid agent is attached to the pump dispenser A itself, the hand is not soiled because it is away from the pump dispenser body.

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, as shown in FIG. 5, the handle portion 5 </ b> A can be integrally formed instead of the housing portion 5.
In that case, the handle 5A can be blow-molded fr together with the container B, and the manufacturing cost is low.
Further, by attaching a known orifice or former to the tip of the nozzle portion, the liquid can be discharged in the form of a mist or foam.
The housing part and the trigger part may be integrally pivoted via a hinge part.
It is also possible to integrate the housing part and the cap.
Moreover, since this pump dispenser has high versatility, it can be used for storage containers such as cosmetics, liquid detergents, washing aids, softeners, shampoos, body soaps, and dishwashing detergents.

The present invention is a trigger type pump dispenser with little sliding resistance with no swinging movement of the piston part, and the nozzle position does not move up and down when discharging liquid, and it can be handled easily even by people with small hands It is a pump dispenser that can
Therefore, for example, as long as the fluid ejection principle of the present invention is used, the present invention can be applied to the field of general industries for coating or medical instruments.

DESCRIPTION OF SYMBOLS 1 ... Piston structure 11 ... Piston part 11A .... Shaft part 12 ... Long nozzle part 1A ... Valve case 1A1 ... Horizontal hole 2 ... Cylinder part 21 ... Large diameter Part 22: Small diameter part 3 ... Crank part 31 ... Conical protrusion 32 ... Lower end part 4 ... Trigger part 41 ... Cylindrical receiving part 42 ... Shaft part 4A ... · Safety piece 4A1 · · · Locking claw 5 · · · Housing portion 5A · · · Handle portion 5A1 · · · receiving claw 5B · · · cylindrical base 6 · · · cap 7 · · · spring A · · · pump Dispenser B ... Container FV ... First valve SV ... Second valve P1 ... Pivot P2 ... Pivot P3 ... Pivot

Claims (8)

A pump dispenser attachable to the container,
A cylinder part;
A piston structure slidable in the cylinder portion;
A housing part mounted on the cylinder part, a handle part formed integrally with the housing part,
A lever part pivotally attached to the housing part and connected to the piston structure via the crank part;
A cap for attaching the cylinder part to the container body,
The piston structure is composed of a flexible long nozzle part and a piston part.
A pump dispenser characterized by pulling down a lever part and bringing it close to a handle part, thereby pulling down a piston part via a crank part to apply pressure into the cylinder part and discharge the liquid through a long nozzle part.   2. The pump dispenser according to claim 1, wherein one end of the crank portion is pivotally attached to the piston portion and the other end is pivotally attached to the lever portion.   2. The pump dispenser according to claim 1, wherein the handle portion is formed integrally with the housing portion.   The pump dispenser according to claim 2 or 3, wherein the lever portion includes a safety piece at the tip thereof via a hinge portion, and the safety piece can be hooked to the handle portion.   5. The pump dispenser according to claim 4, wherein the second valve is provided in a valve case portion that can be mounted in the piston.   6. The pump dispenser according to claim 5, wherein the handle portion is provided so as to be positioned directly below the lever portion, and the lever portion is brought into contact with the handle portion to stop the pulling down.   2. A pump dispenser according to claim 1, wherein a spring for biasing the piston upward is mounted between the cylinder and the piston portion.   2. A pump dispenser according to claim 1, wherein the handle portion is formed integrally with the container instead of the housing portion.

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