WO2008016013A1

WO2008016013A1 - Trigger-type pump dispenser

Info

Publication number: WO2008016013A1
Application number: PCT/JP2007/064907
Authority: WO
Inventors: Tetsuya Tada
Original assignee: Canyon Co., Ltd.
Priority date: 2006-08-02
Filing date: 2007-07-30
Publication date: 2008-02-07
Also published as: JP4366512B2; JP2008036488A

Abstract

[PROBLEMS] A trigger-type pump dispenser in which, although it is constructed such that a piston is pushed down by a trigger structure, the nozzle does not move and, in addition, the dispenser has a simple structure. [MEANS FOR SOLVING PROBLEMS] The trigger-type pump dispenser has a cap (4) attached to a mouth section of a container body (7); a base body (1) having a cylinder (11) engaged with the cap and also having a cover member (12); the piston (23) slidable in the cylinder; and the trigger structure (3) for sliding the piston up and down. Pivoting motion of the trigger structure slides the piston up and down to eject liquid in the cylinder from the nozzle section (21) to the outside. The nozzle section is fixed to the cover member, and a bendable connection section (22) is provided between the piston and the nozzle section to connect them. Up-down movement of the piston is positively absorbed by bending of the connection section.

Description

Specification

Trigger type pump dispenser

Technical field

TECHNICAL FIELD [0001] The present invention relates to a trigger type pump dispenser that is easy to determine when spraying with a vertical movement of a nozzle portion.

More specifically, in a trigger type pump dispenser that slides the piston member up and down to inject the liquid in the cylinder from the nozzle part to the outside, the liquid is accurately applied to the target position without any vertical movement of the nozzle part. The present invention relates to a trigger type pump dispenser that can be hit and has a simple structure.

Conventionally, a trigger type pump dispenser has been used as means for injecting a liquid such as a chemical solution to a predetermined portion.

This pump dispenser has an advantage that the piston moves only by operating the trigger structure and the liquid in the container communicating with the cylinder can be easily ejected from the nozzle.

[0003] In a trigger-type pump dispenser having such a trigger structure (see, for example, Patent Document 1), usually, an operation of grasping the dispenser body, setting the direction to a position to be injected, and pulling the trigger structure ( That is, a rotation operation) is performed.

[0004] Then, by pulling the trigger structure, the partial force S is pushed down, and the head of the piston part is pushed down.

Then, the piston part is lowered and the liquid in the cylinder is compressed. As a result, the liquid is ejected from the nozzle to the outside.

[0005] In this case, since the piston portion and the nozzle are connected, naturally, the nozzle is lowered integrally with the lowering of the piston. Since such a movement occurs during injection, the injection trajectory is a continuous line.

In such a structure where the nozzle part moves up and down, the location where the nozzle is to be sprayed is not determined! /, So the sprayed liquid does not reach the exact location! /.

[0006] In order to solve such problems, a trigger-type pump dispenser having a structure in which the nozzle portion does not move up and down has been developed (Patent Document 1). However, this trigger type pump dispenser does not transmit the movement of the trigger structure directly to the piston.

That is, since the trigger structure transmits the movement to the piston via the swing lever, the structure becomes complicated and the force transmission efficiency is poor from the viewpoint of frictional force.

In addition, since the number of parts is large, the number of assembling steps increases, and failure is likely to occur.

[0007] Patent Document 1: Japanese Patent Laid-Open No. 10-43648

Disclosure of the invention

Problems to be solved by the invention

[0008] The present invention has been made on the basis of power and the background art, and has been made to overcome the above technical problems.

That is, an object of the present invention is to provide a pump dispenser in which the nozzle does not move and the structure is simple even if the trigger pump dispenser has a structure in which the piston is pushed down by the trigger structure.

Means for solving the problem

[0009] As a result of extensive research on the background of such problems, the present inventor has bent the portion between the nozzle and the moving piston so that the piston can be deformed. The present inventors have found that it is possible to absorb up-down movement and have completed the present invention based on this finding.

[0010] That is, the present invention is (1) a cap attached to the mouth of a container body, a base body engaged with the cap and having a cylinder part and a cover member, and slidable within the cylinder part. This is a trigger type that includes a simple piston part and a trigger structure that slides the piston part up and down, and that causes the piston part to slide up and down by the rotation of the trigger structure and ejects liquid in the cylinder from the nozzle part to the outside. In the pump dispenser, the nozzle portion is fixed to the cover member, and a bending-deformable connecting portion that connects the piston portion and the nozzle portion is provided between the piston portion and the nozzle portion. It exists in the trigger type pump dispenser that absorbs positively by bending deformation.

[0011] In the present invention, (2), the trigger structure is pivotally attached to the base body at the first pivotally attached portion and the intermediate position is pivotally attached to the piston member at the second pivotally attached portion. Described in (1) above Trigger type pump dispenser.

[0012] In the present invention, (3), the ratio of the distance between the first pivot part and the second pivot part and the distance from the position of the first pivot part to the trigger tip of the trigger structure is: The present invention resides in the trigger type pump dispenser according to the above (2) which is 1: 4 or more.

[0013] Further, the present invention provides (4) the trigger type according to the above (1), wherein the extended portion of the base body is provided with a trigger lock that can be rotated to a position where the trigger structure is stopped. It exists in the pump dispenser.

[0014] Further, the present invention provides (5) the trigger according to (1), wherein a wall of the cylinder portion is formed with a vent hole communicating with the outside air for eliminating negative pressure in the container body. It exists in the type pump dispenser.

[0015] Further, the present invention provides (6) a first sealing valve for sealing the inside of a cylinder portion to the piston portion, and a second sealing valve located below the first sealing valve. The trigger-type pump dispenser according to the above (5), in which the vent hole in the cylinder part is located above the first sealing valve at the bottom dead center of the piston portion.

[0016] Further, the present invention is (7), wherein the cylinder part is provided with a rod-like closing valve that seals the passage in the piston part at the top dead center of the piston part and blocks the pressure in the container. Triggers are in a set pump dispenser.

[0017] Further, the present invention resides in (8) the trigger type pump dispenser according to the above (1), wherein a longitudinal groove for liquid escape is formed in the lower part of the inner wall of the cylinder part.

[0018] Further, the present invention resides in (9) the trigger-type pump dispenser according to (1), wherein the nozzle portion can be switched to four liquid ejection states including blocking.

[0019] As long as the object of the present invention is met, a configuration in which the above (1) to (9) are appropriately combined can be employed.

The invention's effect

[0020] The trigger type pump dispenser of the present invention includes a nozzle portion fixed to a cover member, and a connecting portion that can be bent and deformed to communicate between the piston portion and the nozzle portion. Since the movement is positively absorbed by the bending deformation of the connecting part, the liquid can be accurately applied to the target position without any vertical movement of the nozzle part at the time of liquid injection. I'll look forward to reaching IJ.

[0021] Since the structure absorbs the vertical movement of the piston by the bending deformation of the connecting portion, the structure is simple without any extra parts and there are few failures.

[0022] The specific force between the distance between the first pivot part and the second pivot part and the distance from the position of the first pivot part to the trigger tip of the trigger structure is 1: 4 or more. This makes it easier to pull the trigger.

[0023] Further, since the extended portion of the base body is provided with a trigger lock that can be rotated to a position where the trigger structure is stopped, the trigger is not accidentally pulled in.

[0024] Further, the wall of the cylinder portion is formed with a vent hole that communicates with the outside air to eliminate the negative pressure in the container body, so that the container body does not contract and sucks liquid. The increase is also efficient.

[0025] In addition, by providing a rod-like closing valve in the cylinder part that seals the passage in the piston part at the top dead center of the piston part and shuts off the pressure in the container, the pressure in the container body is increased for some reason. Even if the liquid flows back into the cylinder part, it does not leak from the nozzle part.

[0026] Further, since the vertical groove for liquid escape is formed in the lower part of the inner wall of the cylinder part, the liquid breakage from the injection port is improved.

[0027] Further, since the nozzle portion can be switched to four liquid injection states including blocking, the degree of freedom in selecting the liquid injection mode is increased.

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, the best mode for carrying out the present invention will be described with reference to the drawings.

FIG. 1 and FIG. 2 are views showing a trigger type pump dispenser according to an embodiment of the present invention, and show a state before and after the trigger 31 is pulled.

The trigger-type pump dispenser, as shown in Fig. 2, draws the trigger 31 that is a part of the trigger structure 3 to slide the piston part 23 downward and inject the liquid in the cylinder from the nozzle part 21. It is.

This trigger-type pump dispenser is provided with a cap 4, a base body 1, a trigger structure 3, and a piston structure 2 that are directly attached to the container, and a first valve FV and a second valve SV are provided in the passage constituted by these. Comes on! These parts are manufactured mainly by injection molding with synthetic resin.

For example, the cap 4 and the base body 1 are made of PP resin, the trigger structure 3 is made of POM resin, and the piston structure 2 is made of LLDPE resin.

[0029] The cap 4 is detachable by screwing into the mouth of the container body 7.

A base body 1 made of synthetic resin is attached to the cap 4.

Since the cap 4 has a tapered portion, it can be easily fixed to the cap 4 with a single touch by pressing the lower end of the base body 1 strongly into the hole of the cap 4.

[0030] The base body 1 includes a hollow cylindrical cylinder portion 11 in which a later-described piston portion 23 can be accommodated, and a cover member 12 hinged to the cylinder portion 11.

The cylinder part 11 has a part extending outwardly, that is, an extension part 11A, and when the pump dispenser is gripped behind the extension part 11A, the base of the thumb comes into contact with and supports the weight. be able to.

[0031] Further, a trigger lock 5 for locking the movement of the trigger 31 is provided in front of the extension portion 11A.

The trigger lock 5 includes a blocking piece 51 and can be rotated to a position where the trigger 31 is stopped.

The blocking piece 51 blocks the movement of the trigger 31 at this stop position.

FIG. 3 is a view for explaining the trigger lock 5, (A) is a plan view and (B) is a front view.

FIG. 4 is a view for explaining a state in which the trigger lock 5 is rotated from the state of FIG. 3 to the stop position of the trigger 31. (A) is a plan view and (B) is a front view.

The locking protrusion 52 of the trigger lock 5 is engaged with and attached to the cylindrical portion 11B rising from the base body 1.

[0033] Below the cylinder part 11 which is a part of the base body 1, a cylindrical part 11C having a smaller diameter is formed. The cylindrical part 11C is provided with a first valve FV (valve with spring). ing. The liquid in the container passes through the first valve FV and is sucked into the cylinder part 11.

Also, the liquid at the bottom of the container is sucked under the cylindrical part 11B and the first valve FV (bar An introduction tube to be introduced to a valve with a net) is attached.

In the cylinder part 11, a two-stage hollow cylindrical piston part 23 having a small diameter part 23A in the upper part is slidably provided, and the piston part 23 is a part of the piston structure 2.

FIG. 5 is a side view showing the piston structure 2.

The piston structure 2 has a nozzle portion 21 at the tip and a connecting portion 22 that connects the nozzle portion 21 and the piston portion 23 integrally.

The nozzle portion 21 is fixed in front of the cover member 12 described above, and is restricted from moving as the piston portion 23 moves!

That is, the protrusion 21A at the upper end of the nozzle 21 is engaged with the engagement hole 12A of the cover member 12, so that the nozzle 21 is fixed and does not move up and down.

The nozzle portion 21 is provided with a second valve SV (a valve with a spring), and the liquid in the container finally passes through the second valve SV and is discharged outward.

[0035] Further, the nose section 21 has four functions of SPRAY, OFF, JET, and NARROW.

That is, it is possible to switch to four liquid ejecting states including blocking by rotating the nozzle N externally attached to the tip of the nozzle portion 21 (4-way nozzle).

In addition, the connecting portion 22 which is a part of the piston structure 2 described above can be bent and deformed, and as will be described in detail later, when the vertical movement of the piston is positively absorbed by bending deformation, It plays an important role.

On the other hand, the trigger structure 3 has a bifurcated portion 32 and a panel portion 33 extending from the trigger 31, and the bifurcated portion 32 is attached to the base body 1 and the piston portion 23, and the spring portion 33 is The main body 1 is held and fixed in place.

FIG. 6 is a side view showing the trigger structure.

Specifically, the trigger structure 3 is pivotally attached to the base body 1 and the piston portion 23 at the end portion and intermediate position of the bifurcated portion 32, respectively.

That is, a circular protrusion 32B is formed at the tip of the bifurcated portion 32 of the trigger structure 3, and this circular protrusion 32B fits into the hole 11A1 formed in the standing wall portion of the base body 1, thereby It is P1.

[0037] In addition, a pair of circular protrusions 23A1 are formed on the side wall of the narrow-diameter portion 23A, which is the upper portion of the piston portion 23. The bifurcated portion 32 of the trigger structure 3 is disposed so as to sandwich the small diameter portion 23A.

Then, the circular protrusion 23A1 is fitted into the circular hole 32A formed at the intermediate position of the bifurcated portion 32, thereby becoming the second pivotally attached portion P2.

Here, the ratio of the distance L1 between the first pivot part P1 and the second pivot part P2 and the distance L2 from the position of the first pivot part P1 to the tip of the trigger 31 (that is, the “leverage ratio”) is 1: 4 or more is preferred.

[0038] Incidentally, since the trigger type pump dispenser in which the conventional nozzle N is fixed has a structure that transmits the movement of the trigger to the piston through the swing lever, such a "leverage ratio" The structure was difficult.

This lever ratio can be increased to 1: 4 or more because the second pivot part P2 as in the present invention is installed on the side surface of the piston so that it can be linearized with the first pivot part P1 and shortened. This is because the.

Here, the “leverage ratio” is shown based on the position of the tip of the trigger 31 because the position where the index finger and the middle finger are hooked tends to be determined automatically when the length of the trigger 31 is set.

[0039] Further, when the panel part 33 of the trigger structure 3 is gripped by the trigger 31 and rotated with the first pivoting part P1 as a starting point, the distance between the two is reduced, and the panel part 33 exhibits the spur in the opposite direction. To do.

That is, the tip of the panel part 33 of the trigger structure 3 is fitted and held and fixed to the step part of the base body 1, and when the trigger 31 is grasped and pulled, the angular force S between the trigger 31 and the spring part 33 is reduced. The trigger acts and the trigger 31 returns to its original position when you release your finger.

[0040] Incidentally, the piston portion 23 is formed with an upper first sealing valve 23B1 for sealing the inside of the cylinder portion 11 and a second sealing valve 23B2 below the first sealing valve 23B1. ing. As will be described later, the operation of the first sealing valve 23B1 and the second sealing valve 23B2 of the piston portion 23 allows the outside air P and the inside of the container body to be in communication and non-communication with each other via the vent hole S2. Can be switched to.

[0041] Further, a vent hole S2 is provided in the wall of the cylinder part 11, and a vent channel for introducing the outside air P into the container body is formed as indicated by an arrow.

The first sealing valve 23B1 of the piston part 23 slides against the cylinder part 11 so that this ventilation is achieved. The flow path is blocked or opened.

[0042] By the way, in the state before the liquid in the container body 7 is jetted, the height positions of the air holes S2 of the cylinder part 11 are the first sealing valve 23B1 and the second sealing valve 23B2 of the piston part 23. Between.

That is, the second sealing valve 23B2 is formed to prevent the liquid that has entered the cylinder part 11 after being sucked up by the introduction hose from leaking, and the outside air P is communicated through the vent hole S2. To prevent this, a first sealing valve 23B1 is formed.

When the trigger 31 is pulled from this state, the liquid in the cylinder part 11 is ejected from the nozzle part 21.

[0043] In this case, the piston part 23 is pushed down by the trigger structure 3 (specifically, the bifurcated part 32), and the first sealing valve 23B1 located above is slid on the inner wall of the cylinder part 11 while venting Move down from S2.

The outside air P enters the inside of the cylinder part 11 and enters the container body 7 through the vent hole S2, and the negative pressure is released.

[0044] When the pressure by the trigger structure 3 is released to return from this state to the original state, the piston part 23 is raised by the urging force of the panel part 33, and the liquid in the container body 7 rises through the introduction hose. The inside space of the cylinder portion 11 (of course, the piston portion) is filled. Finally, the first sealing valve 23B1 moves above the vent hole S2, shuts off the flow of the outside air P, and returns to the original state.

Incidentally, FIG. 7 shows a pump dispenser described so far provided with means for preventing liquid leakage from the nozzle portion 21.

A rod-like closing valve 6 is erected on the bottom of the cylinder part 11 and enters the small diameter part 23A of the piston part 23.

When the cylinder part 11 is at top dead center (corresponding to the position before the trigger 31 is retracted), the expansion part 61 at the end of the closed valve 6 is pressed against the inner wall of the small diameter part 23A and the liquid passage is closed. Is done.

Therefore, when the nozzle part 21 is in the open position, even if the internal pressure of the container increases in this state and the liquid rises through the first valve FV, it does not escape to the nozzle part 21. A force ^S.

Further, a vertical groove SI for liquid escape is formed in the lower part of the inner wall of the cylinder part 11.

This is because there is no vertical groove S 1 in the past, and when the cylinder part 11 approaches the bottom dead center (corresponding to the position where the trigger 31 is pulled off), the pressure decreases and the momentum of the liquid from the injection port N1 gradually decreases. Therefore, the so-called “cut” becomes worse.

However, if the longitudinal groove S1 is present as in the present invention, the liquid escapes through the longitudinal groove S1, so that the pressure in the cylinder is reduced at once (that is, the pressure escapes from the vent hole S2 formed in the cylinder wall). ) The liquid stops.

That is, the “cut” is improved.

[0047] Here, the action of the piston structure 2 will be described in detail in order to show the function of the connecting portion 22 which is an important part of the present invention.

Now, when the trigger 31 of the trigger structure 3 is pulled in order to inject the liquid to a predetermined place, the trigger structure 3 rotates with respect to the first pivot part P1.

Since the trigger structure 3 is pivotally attached to the piston part 23 at the bifurcated part 32 (second pivot part P2), the piston part 23 is pushed downward by the rotation of the trigger structure 3.

The liquid in the cylinder part 11 is compressed by the downward movement of the piston part 23, reaches the nozzle part 21 through the connecting part 22, and is ejected outside from the injection port N1.

At this time, the piston part 23 is pushed down so that the nozzle part 21 integrated therewith also pulls down. As described above, since the nozzle part 21 is fixed to the cover member 12, the connecting part 22 is not lowered. It bends and deforms and actively absorbs the movement of the piston.

[0048] Thus, the trigger type pump dispenser of the present invention does not move the nozzle portion 21 due to the action of the connecting portion 22, and therefore becomes a target when there is no vertical movement of the injection port N1 at the time of liquid injection. The liquid can be accurately ejected to the position.

In addition, since the nozzle portion 21 does not need to be affected by the movement of the piston portion 23, an extra device part is required, so that the structure becomes simple.

Therefore, the failure rate is reduced and the number of assembly steps is small! [0049] Although the present invention has been described above, the present invention is not limited to the above-described embodiments, and various other modifications can be made without departing from the essence thereof. Not too long.

For example, in the above-described embodiment, the nozzle portion 21, the piston portion 23, and the connecting portion 22 are integrated as the piston structure 2, but if the connecting portion 22 can be bent and deformed, they are molded and connected as separate components. May be.

In addition, for attaching the trigger structure 3 to the base body 1 at the tip of the panel portion 33, appropriate means such as fitting, insertion, and support can be adopted.

Further, from the viewpoint of bending deformability, the piston structure 2 can be made of an elastomer resin having better bending deformability than only the force coupling portion where the LLDPE resin is used.

Industrial applicability

[0050] The present invention is also applicable to other fluid injection fields as long as the force S, which is related to the trigger-type pump dispenser that is easy to determine when spraying a chemical solution or the like in which the nozzle portion moves vertically, is used. It can be applied and its application fields are wide.

Brief Description of Drawings

FIG. 1 is an explanatory view showing a trigger type pump dispenser according to an embodiment of the present invention.

FIG. 2 is an explanatory view showing a trigger type pump dispenser according to an embodiment of the present invention.

[Fig. 3] Fig. 3 is a view for explaining the trigger lock, (A) is a plan view and (B) is a front view.

4 is a diagram for explaining a state in which the trigger lock is rotated from the state of FIG. 3 to the trigger stop position, (A) is a plan view and (B) is a front view.

FIG. 5 is an explanatory view showing a piston structure in the trigger type pump dispenser of the present invention.

FIG. 6 is an explanatory view showing a trigger structure in the trigger type pump dispenser of the present invention.

[Fig. 7] Fig. 7 is provided with means for preventing liquid leakage from the nozzle portion according to another embodiment. Trigger type pump dispenser is shown. Explanation of symbols

1 ... Base body

11 ... Cylinder part

11Α ··· Extension

11A1 ... hole

11Β ··· Cylindrical part

11C ... Cylinder part

12… Cover material

12A ... engagement hole

2 ... Piston structure

21… Nozureki

21Α ··· Projection piece

22 ... Connecting part

23 ... Piston part

23 mm

23Α1 ... Circular protrusion

23A2 ... Circular protrusion

23B1… First sealing valve

23B2 ... Secondary sealing valve

3… Trigger structure

31 ... 卜 Jigger

32 ... Fork

32B ... Circular protrusion

33 ... Spring

5 Trigger lock

51 ··· Block 52 ... Locking protrusion

6 ... Closing valve 61 ... Expansion part

7 ··· Container body

FV ... First valve

SV ... second valve

N ... Noznore

Ν1 ... Injection port

S1 ... Vertical groove

S2… Vent hole

外 ... outside air

Ρ1 ··· First pivot point Ρ2 ··· Second pivot point

Claims

The scope of the claims

[1] a cap attached to the mouth of the container body;

A base body having a cylinder portion and a cover member engaged with the cap; a piston portion slidable in the cylinder portion;

A trigger structure for sliding the piston portion up and down;

A trigger type pump dispenser that slides the piston part up and down by the rotation of the trigger structure and injects the liquid in the cylinder from the nozzle part to the outside.

The nozzle portion is fixed to the cover member, and includes a bendable deformable connecting portion that connects the piston portion and the nozzle portion.

A trigger type pump dispenser that positively absorbs the vertical movement of the piston by bending deformation of a connecting portion.

2. The trigger structure according to claim 1, wherein an end portion of the trigger structure is pivotally attached to the base body by a first pivotally attached portion, and an intermediate position is pivotally attached to the piston member by a second pivotally attached portion. Trigger type pump dispenser.

[3] The ratio of the distance between the first pivot point and the second pivot point and the distance from the first pivot point to the trigger tip of the trigger structure is 1: 4 or more. The trigger type pump dispenser according to claim 2.

[4] The trigger-type pump dispenser according to claim 1, wherein a trigger lock that can be rotated to a position where the trigger structure is stopped is provided in the extended portion of the base body.

[5] The trigger type pump dispenser according to claim 1, wherein a vent hole communicating with the outside air is formed in the wall of the cylinder portion to eliminate negative pressure in the container body.

[6] A first sealing valve for sealing the inside of the cylinder portion to the piston portion and a second sealing valve below the first sealing valve are formed, and the ventilation of the cylinder portion 6. The trigger type pump dispenser according to claim 5, wherein the hole is located above the first sealing valve at a bottom dead center of the piston portion.

[7] The cylinder part is sealed at the top dead center of the piston part, and the pressure in the container is sealed. 2. The trigger type pump dispenser according to claim 1, further comprising a bar-shaped closing valve for blocking.

[8] The trigger type pump dispenser according to claim 1, wherein a longitudinal groove for liquid escape is formed in a lower part of the inner wall of the cylinder part.

9. The trigger type pump dispenser according to claim 1, wherein the nozzle portion can be switched to four liquid injection states including blocking.