WO2008016012A1 - Trigger-type pump dispenser - Google Patents

Abstract

[PROBLEMS] To provide a trigger-type pump dispenser which has extremely small number of part items and is easily assembled. [MEANS FOR SOLVING PROBLEMS] The trigger-type pump dispenser is provided with a cap (4) attached to an opening section of a container main body; a base main body (1) which is engaged with the cap and has a cylinder section (11) and a cover member (12); a piston section (23) which can slide in the cylinder section; and a trigger structure (3) which vertically slides the piston section (23). A liquid in the cylinder is jetted out to the external from the nozzle section (21) by vertically sliding the piston section (23) by turning the trigger structure (3). The cover member (12) is connected to the rear end of the base main body (1) with a hinge.

Description

 Specification

 Trigger type pump dispenser

 Technical field

 The present invention relates to a trigger type pump dispenser that is extremely easy to assemble.

 More specifically, the present invention relates to a trigger type pump dispenser that has a small number of parts and can be easily assembled by integrating a cover member and a base body or a trigger and a spring body.

 Conventionally, a trigger-type pump dispenser has been used as means for injecting a chemical solution or the like to a predetermined portion.

 This pump dispenser is useful because it has the advantage that the piston can be moved just by pulling the trigger, and the liquid in the cylinder communicating with the container can be easily ejected from the nozzle.

 [0003] In a trigger-type pump dispenser having such a trigger (for example, see Patent Document 1 and Patent Document 2), many parts such as a cover member, a spring body, a trigger, a base body, a cylinder, and a piston are included. is necessary.

 Therefore, in addition to increasing the number of man-hours for assembling these parts, the problem is that the number of failures increases.

 In order to solve such problems, there is a demand for a trigger type pump dispenser having a structure having as few parts as possible (Patent Documents;! To 4).

[0004] Patent Document 1: Japanese Patent Application Laid-Open No. 2002-18331

 Patent Document 2: Japanese Patent Laid-Open No. 10-43648

 Patent Document 3: Japanese Patent Laid-Open No. 11 309391

 Patent Document 4: JP-A-10-57853

 Disclosure of the invention

 Problems to be solved by the invention

[0005] 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, the present invention provides a trigger type pump dispenser with as few parts as possible. Another object is to provide a pump dispenser that is easy to assemble.

 Means for solving the problem

 [0006] As a result of extensive research on the background of such problems, the present inventor has found that the assembly can be facilitated by integrating at least the base portion and the cover member. The present invention has been completed based on this finding.

[0007] That is, the present invention is (1) a cap attached to the mouth of the 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 cover member is a trigger type pump dispenser in which the cover member is hinged to the rear end of the base body.

The present invention also provides (2) the tri-piece according to the above (1), wherein the base body has an expansion portion that expands from the upper portion of the cylinder portion, and the cover member is hinged to the rear end of the expansion portion.

 [0009] Further, the present invention is (3), wherein the trigger structure comprises a trigger, a bifurcated portion extending from the trigger, and a panel portion, and the bifurcated portion is disposed so as to sandwich the piston portion. It exists in the trigger type pump dispenser described in 1).

 [0010] Further, the present invention resides in (4) the trigger type pump dispenser according to the above (3), in which the trigger and the panel portion are caused to cause a spur (return force) on the trigger.

 [0011] In the present invention, (5), the trigger is pivotally attached at its end to the base body at the first pivot part, and at an intermediate position to the piston member at the second pivot part. 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 1: 4 or more. Trigger type pump dispenser

[0012] In addition, the present invention provides: (6) The trigger type pump dispenser according to (1), wherein the extended portion of the base body includes a trigger lock that can be rotated to a position where the trigger is stopped. It exists in Saichi. [0013] Further, the present invention resides in (7) the trigger type pump dispenser according to (1), wherein the nozzle portion can be switched to four liquid injection states including blocking.

 [0014] In the present invention, (8), the nozzle portion is fixed to the cover member, and the piston member includes a nozzle portion and a connecting portion capable of bending deformation that connects the nozzle portion and the piston portion. In the trigger type pump dispenser according to (1), the piston is actively absorbed by the bending deformation of the connecting portion.

 [0015] It should be noted that a configuration in which the above (1) to (8) are appropriately combined can be employed as long as the object of the present invention is met.

 The invention's effect

 [0016] The trigger type pump dispenser of the present invention is easy to assemble because the cover member is hinged to the rear end of the base body.

 In addition, the base body has an extension part that expands from the upper part of the cylinder part, and the cover member is hinged to the rear end of the extension part so that the position of the pivoting part relative to the base body of the trigger structure Can be backwards.

 In addition, the trigger structure is composed of a trigger, a bifurcated portion extending from the trigger, and a panel portion. The bifurcated portion is disposed so as to sandwich the piston portion, so that assembly is facilitated and failure is reduced. .

 Moreover, the return force can be obtained efficiently by generating a repulsive force (return force) on the trigger due to the proximity of the trigger and the panel part.

 Since this structure absorbs the vertical movement of the piston by the bending deformation of the connecting portion, it does not require extra parts and the structure is simple and there are few failures.

[0017] Further, the ratio 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.

In addition, 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. In addition, since the nozzle part 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, is designed to eject the liquid in the cylinder from the nozzle part 21 by pulling the trigger 31 which is a part of the trigger structure 3 and sliding the piston part 23 downward. .

 This trigger-type pump dispenser is provided with a cap 4 that is directly attached to the container body 7, a base body 1, a trigger structure 3, and a piston structure 2, and a first valve FV and a second valve are formed in a passage formed by these caps. With SV! /

 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.

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

 A base body 1 is attached to the cap 4.

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

[0020] The base body 1 includes a hollow cylindrical cylinder portion 11 in which a piston portion 23 described later 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 the cover member is hinged to the rear end of the extension part.

 In addition, when the pump dispenser is gripped behind the extension 11A, the base of the thumb can abut against this to support its weight.

FIG. 3 is a view showing the base body, (A) is a plan view, (B) is a side view with the cover member open, and (C) is a side view with the cover member closed. FIG.

 The cover member is rotatable about the hinge portion H as a fulcrum. When the cover member is rotated from the state (B) in the direction of the arrow, the cover member is brought into the state (C) with one touch.

In this state, the upward locking projection 11D provided on the base body 1 is covered with the cover member 12 The force bar member 12 once engaged with the base body 1 is securely fixed by being inserted into the receiving hole 12B.

 Thus, since the cover member 12 and the cylinder part 11 are integrated, assembly is easy.

 [0022] 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.

4A and 4B are diagrams for explaining the trigger lock. FIG. 4A is a plan view and FIG. 4B is a front view.

 FIG. 5 is a diagram for explaining a state in which the trigger lock is rotated from the state of FIG. 4 to the trigger stop position, where (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.

[0024] A cylindrical portion 11C having a smaller diameter is formed under the cylinder portion 11 which is a part of the base body 1, and a first valve FV (valve with spring) is formed in the cylindrical portion 11C. The liquid in the provided container passes through the first valve FV and is sucked into the cylinder 11!

 Also, an introduction tube that sucks up the liquid at the bottom of the container and introduces it into the first valve FV (valve with spring) is mounted below the cylinder portion 11B.

 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. 6 is a side view showing the piston structure.

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

[0026] 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.

[0027] 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 also a base. The main body 1 is held and fixed in place.

 FIG. 7 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 the circular protrusion 32B is fitted into the hole 11A1 formed in the standing wall portion of the base body 1 to be attached to the first pivot. Part P1.

[0028] Further, a pair of circular protrusions 23A1 are formed on the side wall of the small-diameter portion 23A that is the upper portion of the piston portion 23, and the bifurcated portion 32 of the trigger structure 3 is arranged so as to sandwich the small-diameter portion 23A. It is installed.

 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 to the distance L2 from the position of the first pivot part P1 to the tip of the trigger 31 (ie, the “leverage ratio”) is 1 : 4 or more is preferred.

[0029] Incidentally, in the trigger type pump dispenser in which the conventional nozzle N is fixed, Since this is a structure that transmits the movement of the motor to the piston through the swing lever, it is difficult to achieve such a “leverage ratio”.

 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.

 [0030] In addition, when the panel 33 of the trigger structure 3 is gripped by the trigger 31 and rotated with the first pivoting portion P1 as the starting point, the distance between the two is reduced, and the panel portion 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.

By the way, the piston part 23 has an upper first sealing valve for sealing the inside of the cylinder part 11.

23B1 and a second sealing valve 23B2 below the first sealing valve 23B1 are formed. 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.

[0032] Further, the wall of the cylinder part 11 is provided with a vent hole S2, and a vent channel for introducing the outside air P into the container body is formed as indicated by an arrow.

 When the first sealing valve 23B1 of the piston portion 23 slides against the cylinder portion 11, the ventilation passage is blocked or opened.

Incidentally, 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 not in the nozzle part 21. Is injected.

 [0034] In this case, the piston 23 is pushed down by the trigger structure 3 (specifically, the bifurcated portion 32), and the first sealing valve 23B1 on the upper side is slid on the inner wall of the cylinder portion 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.

 [0035] 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 biasing force of the panel part 33, and the liquid in the container body 7 rises via 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. 8 shows a pump dispenser described so far provided with means for preventing liquid leakage from the nozzle portion.

 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 closing valve 6 is pressed against the inner wall of the small diameter part 23A and the liquid passage is closed. It is.

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, there is an effect force ^s that does not escape to the nozzle part 21.

 [0037] Further, a vertical groove S1 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.

If there is a longitudinal groove S1 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 is formed in the vent hole S 2 formed in the cylinder wall). The liquid stops. That is, the “cut” is improved.

Here, the operation of the piston structure 2 will be described in detail in order to show the function of the connecting portion 22.

 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 portion 23 is pushed down so that the nozzle portion 21 integrated therewith also pulls down. As described above, since the nose portion 21 is fixed to the cover member 12, it does not drop. However, here, the connecting part 22 is bent and deformed and actively absorbs the movement of the piston.

[0039] As described above, 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. Therefore, when the liquid is jetted, the jet port N1 does not move up and down at all. 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.

 The cover member is hinged to the rear end of the base body, and the trigger structure is composed of a trigger, a bifurcated part extending from it and a panel part, and is a failure. The rate is reduced and the number of assembly steps is small.

[0040] While 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. .

 For example, attachment of the trigger structure 3 to the base body 1 at the tip of the panel portion 33 can employ appropriate means such as fitting, insertion, and support.

 It is of course possible to change the material of the trigger structure 3 in order to adjust the bursting property of the panel portion 33.

Industrial applicability [0041] The present invention relates to a trigger-type pump dispenser having a small number of parts and easy assembly by integrating a cover member and a base body or a trigger and a spring body, etc. It can also be applied to the fluid ejection field, and its application field is 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 is a view showing the base body, (A) is a plan view, (B) is a side view with the cover member open, and (C) is a state with the cover member closed. It is a side view. It is a figure which shows a connection state with a main body.

 [FIG. 4] FIGS. 4A and 4B are diagrams for explaining the trigger lock. FIG. 4A is a plan view and FIG. 4B is a front view.

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

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

 FIG. 7 is an explanatory view showing a trigger structure in the trigger type pump dispenser of the present invention.

 [FIG. 8] FIG. 8 shows a trigger-type pump dispenser provided with means for preventing liquid leakage from the nozzle portion according to another embodiment.

 Explanation of symbols

[0043] 1 · · · Base body

 11 · · · Cylinder

 11Α

 11A1 ... hole

11B ... Cylindrical part 1C… Cylinder 1D --- Locking projection 2… Cover member 2A… Engagement hole 2Β ··· Receiving hole ··· Piston structure 1 ··· Nozzle 咅 1Α ··· Projection piece 2 ··· Connecting portion 3 Piston part 3A ... Small diameter part 3A1 ... Circular protrusion 3A2 ... Circular protrusion 3B1 ... First sealing valve 3B2 ... Second sealing valve ... Trigger structure;! ... HJ Gir 2 ... Forked part 2Α ··· Circular hole 2Β ··· Circular protrusion 3 ··· Spring portion ··· Cap ··· Trigger lock 1 ··· Blocking piece 2 ··· Locking protrusion ··· Closing valve 1 ··· Expansion portion ··· Container body FV ... First valve

SV ... second valve

N ... Nozzle

 Ν1 ... Injection port

 SI ... Vertical groove

 S2… Vent hole

 P ... Open air

 Ρ1 ··· First pivot part Ρ2 ··· Second pivot part H… Hinge part

Claims

The scope of the claims [1] a cap attached to the mouth of the container body;  A base body engaged with the cap and having a cylinder part and a cover member; a piston part slidable in the cylinder part;  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.  A trigger pump dispenser, wherein the cover member is hinged to the rear end of the base body.  [2] The trigger according to claim 1, wherein the base body has an extended portion that expands from an upper portion of the cylinder portion, and the cover member is hinged to the rear end of the extended portion. Pump dispenser.  [3] The tongue according to claim 1, wherein the trigger structure includes a trigger, a bifurcated portion extending from the trigger, and a panel portion, and the bifurcated portion is disposed so as to sandwich the piston portion. Riga set pump dispenser.  [4] The trigger-type pump dispenser according to [3], wherein the trigger is caused to sag by the proximity of the trigger and the panel part.  [5] The trigger structure has an end portion pivotally attached to the base body at the first pivot portion, and an intermediate position pivotally attached to the piston member at the second pivot portion. 2. The trigger type pump according to claim 1, wherein the specific force S of the distance between the 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. dispenser.  [6] The trigger type pump dispenser according to claim 1, wherein the extended portion of the base body is provided with a trigger mouth that can be rotated to a position where the trigger is stopped! /. Yes  [7] The trigger-type pump dispenser according to [1], wherein the nozzle portion can be switched to four liquid injection states including blocking. [8] The nozzle portion is fixed to the cover member, and the piston portion includes a nozzle portion and a connecting portion that can be bent and deformed to communicate the nozzle portion and the piston portion. 2. The trigger type pump dispenser according to claim 1, wherein the piston is positively absorbed by the bending deformation of the connecting portion.