JP2008056314A - Trigger type liquid jetting pump - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a liquid jetting pump suitable for separate disposal and with a compact and simple constitution. <P>SOLUTION: In a trigger type liquid jetting pump, an injecting cylinder 10 and a cylinder 16 are projected forward at upper and lower two steps from a main cylinder 6 for sucking a liquid. This injecting cylinder 10 is formed with an injecting cylinder main body 10a continuous to the main cylinder and a cylindrical connecting member 10b fitted to this main body front part. A nozzle cylinder 26 is attached to the tip of this connecting member, and the upper end part of a trigger 36 is pivoted by the front half part of the injecting cylinder 10, and the middle part of this trigger 36 is connected with a plunger 18 sliding forward and backward in the cylinder 16. By energizing forward this plunger 18, the liquid can be jetted by operating the trigger 36. An auxiliary member 54 extending an elastic connecting piece 58 from the upper end of a non-slip strip plate 56 stuck on the front face of the trigger 36 is integrally assembled with the trigger 36. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a trigger type liquid ejection pump.

  As this kind of trigger type liquid ejector, a cylinder with a spin channel extending from the vertical main cylinder communicating with the container body side in a two-stage upward and downward direction, and extending from the main body of the injection cylinder A nozzle cylinder is fitted to the front part of the connecting member (spin element), a trigger pivotally attached to the upper end is suspended from the injection cylinder, and the plunger is retracted in the cylinder by the rearward drawing of the trigger, It is known that the plunger moves forward with a metal spring built in a cylinder by releasing the trigger.

However, in recent years, it has been desired not to use metal parts because of the need for separate disposal. Therefore, instead of the metal spring, an elastic spring is installed between the rear surface of the trigger and the cylinder (Patent Document 1), or an elastic plate is extended rearward from the upper end of the trigger. The structure (patent document 2) connected with the right and left both-sides rear part of the liquid ejector is proposed.
JP-A-10-235245 JP 11-024551 A

  In the thing of patent document 1, since an elastic spring is assembled | attached to a pump main body separately from a trigger, an assembly is troublesome. Moreover, in the thing of patent document 2, the whole structure of the trigger containing an elastic board will become large, and will become bulky as the whole liquid ejector.

  In order to avoid such inconvenience, the present applicant attaches a non-slip plate to the front surface of the above-mentioned trigger, and attaches the tip of the elastic piece extending from the upper end of the anti-slip plate to the pivot attachment portion of the trigger. The structure which was made to adjoin and was clamped between the front part of the injection cylinder main body mentioned above and the rear-end part of a cylindrical connection material was devised. However, in this configuration, the assembly work becomes complicated, and unnecessary force acts from the outside through the elastic piece, so that the position of the parts being assembled may be displaced, and the positional relationship between the parts may be inappropriately distorted. is there.

  An object of the present invention is to provide a liquid jet pump suitable for separation and disposal, which can be easily and smoothly assembled with a compact structure.

The first means is
From the main cylinder 6 for sucking up the liquid, the injection cylinder 10 and the cylinder 16 protrude forward in two steps,
The injection cylinder 10 is formed of an injection cylinder main body 10a continuous with at least the main cylinder and a cylindrical connecting member 10b fitted to the front of the main body, and a nozzle cylinder 26 is attached to the tip of the connecting member,
An upper end portion of the trigger 36 is pivotally attached to the front half portion of the injection cylinder body 10a, and an intermediate portion of the trigger 36 is connected to the plunger 20 that slides in the front-rear direction in the cylinder 16,
In the trigger type liquid ejection pump provided such that liquid can be ejected by operating the trigger 36 by biasing the plunger 20 forward.
An auxiliary member 54, which is formed by extending an elastic connecting piece 58 from the upper end of a belt-like anti-slip plate 56 attached to the front surface of the trigger 36, is assembled to the trigger 36 integrally.
The elastic connecting piece 58 is linked to the cylindrical connecting material portion in front of the front end of the injection cylinder main body 10a, the elastic connecting piece 58 is extended by pulling the trigger, and the trigger 36 is moved by elastic recovery of the elastic connecting piece. It is configured to return to the original position.

  In this means, an elastic connecting piece extending upward from a non-slip plate attached to the trigger is linked to the injection cylinder side to obtain an elastic restoring force of the trigger. Specifically, a cylindrical connecting member in which the front half and the rear half are fitted to the rear part of the nozzle cylinder and the front part of the injection cylinder main body is provided, and the elastic connecting piece is linked to the cylindrical connecting member. . This facilitates assembly work. The shape of the elastic connecting piece is arbitrary, and may be formed like a stretchable plate with a connecting ring, which will be described later, but can also be formed in an inverted U-shaped band shape. The said cylindrical connection material is good to have a function as a spin cylinder. The auxiliary member may be formed of a non-metallic elastic body, for example, an elastomer or rubber described later.

The second means has the first means,
When the trigger 36 is pulled backward by disposing the link portion of the elastic connecting piece 58 to the cylindrical connecting member portion above the lower end of the elastic connecting piece 58 or in front of the lower end, the link portion Further, the pulling force of the elastic connecting piece 58 is configured to act on the rear side.

  As described above, when a part of the connecting piece is sandwiched between the injection cylinder main body and the cylindrical connecting material fitted to the front part of the injection cylinder, the cylindrical connecting material or There is a risk that the nozzle tube will come off. Therefore, in this means, the elastic connecting piece is locked to the cylindrical connecting material portion in front of the injection cylinder main body. Since the cylindrical connecting material portion in front of the injection cylinder main body is exposed to the outside until the nozzle cylinder is fitted, assembly is easy.

The third means includes the first means or the second means, and the elastic connection piece 58 is formed by attaching a connection ring 62 to the upper end of the belt-like elastic plate 60, and this connection The ring 62 is sandwiched between the front surface of the outward flange 12 connected to the outer surface of the intermediate portion of the tubular connecting member 10b and the front end of the injection tube main body 10a, and the rear portion of the nozzle tube 26. .

  In this means, the elastic band plate is an expansion / contraction plate with a connection ring, and this connection piece serves as a cushion to absorb an impact when, for example, the liquid jet pump is dropped on the floor.

The fourth means includes the third means, and the auxiliary member 54 is formed as an integrally molded product of elastomer and is united with the trigger 36 by insert molding.

  In this means, the auxiliary member 54 is formed of an elastomer, so that the three functions of anti-slip, elastic material, and cushion are realized with one material.

The invention according to the first means has the following effects.
O Since the elastic connecting piece 58 is used in place of the metal spring, it is easy to separate and discard.
The elastic connecting piece 58 protrudes upward from the anti-slip plate 56 attached to the trigger 36 and is linked to the cylindrical connecting member 10b of the injection cylinder, so that it is not bulky.
O Since the linkage portion is located in front of the front end of the injection tube main body 10a, the attaching operation of the elastic connecting piece 58 is simpler than the case where it is incorporated in the back of the injection tube main body.
○ When attaching the trigger 36, first attach the pivot shaft of the trigger to the injection cylinder 10 and assemble the parts on the injection cylinder side, and then attach the elastic connecting piece 58. Unnecessary force is applied to the pump, and the direction and position of the pump can be prevented from shifting.

  According to the second aspect of the present invention, when the trigger 36 is pulled, a pulling force is applied to the position where the tubular connecting member portion is linked to the rear side. Can be prevented from falling out.

  According to the third aspect of the invention, since the elastic connecting piece 58 is sandwiched between the front surface of the outward flange 12 connected to the front end of the injection cylinder body 10a and the rear part of the nozzle cylinder 26, the liquid ejection pump is placed on the floor. Even if the nozzle cylinder collides with the floor surface by dropping, the connecting ring 62 acts as a cushion to reduce the impact force, so that the nozzle cylinder 26 does not fall off due to the impact of collision.

The invention according to the fourth means has the following effects.
○ Since the auxiliary member 54 having the connecting ring, the expansion / contraction plate, and the anti-slip plate is made of one component made of elastomer, one elastomer molded product can be divided into three types: a cushion that elastically compresses, a connecting band that elastically expands, and a non-slip material. The number of parts can be reduced as compared with the case of manufacturing separately.
○ Functionally, the three parts are integrated into one part (auxiliary member), and this part is combined with the trigger by insert molding, so the installation work is simplified.

  1 and 6 show an embodiment of the trigger type liquid jet pump of the present invention.

  First, a known part of the configuration of the pump will be described. This liquid jet pump has a mounting cylinder 2 to the container neck and neck portion, and a main cylinder 6 that is closed at the upper end is erected from the upper surface of the top connecting cylinder 4 fitted to the upper end opening of the mounting cylinder. Yes. From the upper end of the main cylinder 6, an injection cylinder 10 and a cylinder 16 from the middle part of the main cylinder 6 are projected forward in two stages, and a plunger 20 is slid back and forth in the cylinder 16. It fits freely. The insides of the injection cylinder and the cylinder communicate with the inside of the main cylinder through a pair of upper and lower communication holes formed in the front wall of the main cylinder. Although not shown, a discharge valve is provided in the main cylinder portion between the two communication holes, and a suction valve is provided in the main cylinder portion below the lower communication hole. Then, the trigger 36 is pivotably suspended from the front half of the injection cylinder 10, the rear part of the trigger 36 is connected to the front part of the plunger 20, and the operation of the trigger causes the liquid in the container body to pass through the suction valve. The liquid is sucked into the cylinder and the liquid in the cylinder is pumped into the injection cylinder through the discharge valve. As shown in FIG. 6, the injection cylinder 10 includes an injection cylinder main body 10a continuous to the main cylinder 6, a cylindrical connecting member 10b fitted to the front end of the injection cylinder main body, and a pivot shaft described later. In order to do this, it is formed by a half-cylinder-shaped holding member 10c fitted to the upper surface of the injection cylinder main body. The illustrated cylindrical connecting member 10b is provided with an outward flange 12 at the front end of a small-diameter rear half cylinder part, and a large-diameter front half cylinder part eccentric from the front side of the outward flange below the rear half cylinder part. It protrudes. A spin channel is formed in the front half cylinder portion. The second half of the cylindrical connecting member 10b is fitted to the front outer surface of the injection cylinder, and the first half of the cylindrical connecting member is fitted to the inner surface of the nozzle cylinder 26. A hood 8 covers the cylindrical connecting material, the main cylinder, and the tip of the injection cylinder main body 10a.

  The trigger 36 has a side plate 39 projecting from the left and right sides of a vertically long board 38 in a rearward projecting manner to form a U-shaped cross section, and as shown in FIG. 3, a pair of left and right support arms 40 are erected continuously from the upper end of the side plate. And it is pivotally attached to the front left and right both sides of the injection cylinder 10. In the illustrated example, the shaft portion 42 protrudes outward from the outer surface of the upper end portion of each support arm. Then, the rear surface of each of the shaft portions abuts against the front ends of the ribs 14 provided laterally on both the left and right sides of the injection cylinder main body 10a, and the front half of the shaft portion is held by the hook 13 of the holding member 10c.

  In the present invention, the plunger 20 extends forward from the inside of the cylinder 16 and has vertical grooves 22 vertically formed on both left and right side surfaces of the plunger tip.

    The trigger 36 has a rectangular cylindrical engagement tube 44 projecting obliquely downward from the upper back surface of the substrate 38, and engagement protrusions 46, 46 are provided on the inner surfaces of the left and right walls of the engagement tube. In the illustrated example, the substrate portion inside the engagement cylinder is cut out for die cutting. These engagement protrusions are loosely fitted in the longitudinal grooves 22 of the plunger, thereby connecting the trigger 36 and the plunger 20.

  An auxiliary member 54 is assembled to the trigger 36. The auxiliary member includes an anti-slip plate 56 and an elastic connecting piece 58, and is integrally formed of an elastomer. The anti-slip plate has a strip shape that is long in the vertical direction, and is attached to the front surface of the substrate 38 except for the upper end of the trigger. The elastic connecting piece 58 extends vertically upward from the upper end of the anti-slip plate. This elastic connecting piece is formed by an elastic plate 60 having the same width as the anti-slip plate 56 and a connecting ring 62 attached to the upper end of the elastic plate. The inner diameter of the connecting ring 62 corresponds to the outer diameter of the front half of the cylindrical connecting member 10 c, and the outer diameter of the connecting ring corresponds to the outer diameter of the outward flange 12. And when attaching to the cylindrical connecting material, before fitting the nozzle cylinder, the ring hole of the connecting ring 62 is inserted into the first half of the cylindrical connecting material, and the connecting ring 62 is connected to the front surface of the outward flange and the nozzle. What is necessary is just to clamp between the rear ends of a pipe | tube. The auxiliary member 54 can be combined with the trigger by insert molding.

  In the above configuration, when the finger is placed on the anti-slip plate 56 on the front surface of the trigger 36 and the trigger is pulled, the lower end P of the elastic plate 60 rotates around the rotation axis O of the trigger as shown in FIG. Elastically stretches. At this time, stress acts on the upper end Q of the elongated plate downward and rearward, so that the cylindrical connecting member 10b and the nozzle cylinder 26 are not pulled forward. When the trigger 36 is opened, the trigger returns to the original position by the restoring force of the telescopic plate 60. Thereby, the liquid is sucked up from the inside of the container, and further the liquid is ejected through the injection cylinder.

It is a longitudinal cross-sectional view of embodiment of the trigger type | mold liquid ejection pump of this invention. It is a top view of the principal part (a trigger and an auxiliary member) of the pump of FIG. It is a front view of the principal part of FIG. It is a side view of the principal part of FIG. It is action | operation explanatory drawing of the ejection pump of FIG. It is a partially expanded sectional view of the jet pump of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 2 ... Installation cylinder 4 ... Connection cylinder 6 ... Main cylinder 8 ... Hood 10 ... Injection cylinder 10a ... Injection cylinder main body 10b ... Cylindrical connection material 10c ... Holding member 12 ... Outward flange 13 ... Hook 14 ... Rib
16 ... Cylinder 20 ... Plunger 22 ... Vertical groove
26 ... Nozzle tube
36 ... Trigger 38 ... Substrate 39 ... Side plate 40 ... Support arm 42 ... Shaft
44 ... engaging cylinder 46 ... engaging protrusion
54 ... Auxiliary member 56 ... Anti-slip plate 58 ... Elastic connecting piece 60 ... Stretch plate 62 ... Connecting ring

Claims (4)

From the main cylinder 6 for sucking up the liquid, the injection cylinder 10 and the cylinder 16 protrude forward in two steps,
The injection cylinder 10 is formed of an injection cylinder main body 10a continuous with at least the main cylinder and a cylindrical connecting member 10b fitted to the front of the main body, and a nozzle cylinder 26 is attached to the tip of the connecting member,
An upper end portion of the trigger 36 is pivotally attached to the front half portion of the injection cylinder body 10a, and an intermediate portion of the trigger 36 is connected to the plunger 20 that slides in the front-rear direction in the cylinder 16,
In the trigger type liquid ejection pump provided such that liquid can be ejected by operating the trigger 36 by biasing the plunger 20 forward.
An auxiliary member 54, which is formed by extending an elastic connecting piece 58 from the upper end of a belt-like anti-slip plate 56 attached to the front surface of the trigger 36, is assembled to the trigger 36 integrally.
The elastic connecting piece 58 is linked to the cylindrical connecting material portion in front of the front end of the injection cylinder main body 10a, the elastic connecting piece 58 is extended by pulling the trigger, and the trigger 36 is moved by elastic recovery of the elastic connecting piece. A trigger type liquid jet pump characterized by being configured to return to its original position.   When the trigger 36 is pulled backward by disposing the link portion of the elastic connecting piece 58 to the cylindrical connecting member portion above the lower end of the elastic connecting piece 58 or in front of the lower end, the link portion The trigger type liquid jet pump according to claim 1, wherein a tensile force of the elastic connecting piece 58 is applied to the rear side.   The elastic connecting piece 58 is formed by attaching a connecting ring 62 to the upper end of a belt-like elastic plate 60, and the connecting ring 62 is connected to the front end of the injection cylinder main body 10a so as to be in the middle of the cylindrical connecting member 10b. The trigger type liquid jet pump according to claim 1, wherein the trigger type liquid jet pump is sandwiched between a front surface of the outward flange 12 attached to the outer surface of the unit and a rear portion of the nozzle cylinder 26. The trigger type liquid jet pump according to claim 3, wherein the auxiliary member (54) is formed as an integrally molded product of elastomer and is combined with the trigger (36) by insert molding.

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