JPH1142451A - Trigger type liquid spouting pump - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a trigger liq. spouting pump capable of being easily assembled because of its structure made as simple as possible, capable of being formed with only the materials not needing separation when being discharged while minimizing use of metallic members, capable of being formed without greatly changing the shape of the conventional pump of this kind and with the plunger easily returned. SOLUTION: A valve member 7 of special structure is fitted in a vertical cylinder 17 to form the delivery valve and suction valve, a laterally-long elastic sheet 24 is integrally extended backward from a pivoting part to impart resiliency to a trigger 5, and the tip of the plunger 6 is connected to the upper part of the trigger and made rotatable along with the reciprocation of the trigger. Consequently, a coiled spring is not needed in this pump.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

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

[0002]

2. Description of the Related Art As a trigger type liquid ejection pump, for example, a mounting cap is fitted to the mouth and neck of a container body, and is fitted and fixed on the cap, and from the middle of a vertical cylinder rising from the upper end of the cap. The cylinder is provided with a pump body having an injection cylinder projecting forward from the upper end thereof, and a trigger is linked to a tip of a plunger protruded so as to be able to be pushed forward in a forward biased state from a front end opening of the cylinder. By the operation of the built-in pump mechanism by operating the trigger,
2. Description of the Related Art There is known a configuration in which a liquid in a container is sucked up and ejected from a front end of an injection cylinder.

As the pump mechanism, for example, in addition to the presence of the trigger and the plunger, the inside of the container communicates with the inside of the vertical cylinder through a suction pipe fitted to the lower end of the vertical cylinder. The inside of the cylinder and the inside of the vertical cylinder and the inside of the injection cylinder and the inside of the vertical cylinder are connected to each other through the communication hole to form a liquid flow path from the inside of the container to the injection cylinder, and a suction valve is provided upstream of the cylinder in the flow path. And those provided with a discharge valve downstream.

Further, as the above-mentioned suction valve, for example, there is a valve in which a metal ball-shaped valve body is mounted on a valve seat provided at a lower part in a vertical cylinder. An example is one in which a peripheral portion of a valve plate extending from a lower surface of a base fitted and fixed to an upper end portion via an elastic plate is pressed against an upwardly stepped valve seat formed at an upper portion in a vertical cylinder.

[0005] In addition, the forward biasing of the plunger in such a conventional pump is generally performed by a metal coil spring interposed at the rear of the plunger in the cylinder. That is, the plunger is constantly pressed forward by the coil spring, the plunger is retracted while the coil spring is compressed by pulling the trigger and pushing the plunger, and when the trigger is released, the plunger is pushed back by the spring force of the spring. Make a back and forth movement as shown.

[0006]

In the above-mentioned conventional pump, since the suction valve and the discharge valve are formed independently of each other, the structure becomes complicated and the assembling work becomes complicated.
In the case of using the above-mentioned metal ball-shaped valve element or metal coil spring, a good valve hole sealing property or a good plunger return function is exerted to provide a good liquid discharging function of the pump. However, in recent years, waste treatment has required the separation of metals and plastics. Conventionally, these ball valves or coil springs are generally fine, and are sealed inside. It was extremely difficult to separate them for such reasons. Also, when assembling, these ball-shaped valve bodies and coil springs are inconvenient to handle because they are minute.

In view of such circumstances, attempts have been made to change the ball-shaped valve element and the coil spring from metal to plastic, but plastic is generally more durable and durable than metal. Poor elastic restoring force. Plastic ball-shaped valve elements are harder to obtain sphericity than metal-made valve elements. However, the size and size of the pump must be greatly affected, which is not practical at present.

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and has a simple structure and is easy to assemble. Further, it is possible to use only a material which does not require a sorting process as much as possible without using a metal member as much as possible. Another object of the present invention is to provide a trigger type liquid ejection pump which can be formed without significantly changing the form of a conventional pump of this type and has excellent return capability of a plunger.

[0009]

In order to solve the above-mentioned problems, a pump according to the present invention has a mounting cap 2 fitted on the outer periphery of the neck of a container body, and a pump fitted and fixed on the mounting cap. The cylinder 18 is protruded forward from the middle of the vertical cylinder 17 standing from the upper end of the mounting cap, and the injection cylinder 19 is projected forward from the upper part thereof. The first communication hole c communicating with the small-diameter cylindrical portion 17b constituting the upper part of the vertical cylinder communicates with the inside of the cylinder.
A pump body 4 having communication holes d formed therein, a trigger 5 pivotally mounted on the front portion of the injection cylinder so as to be pivotally mounted, and a trigger 5 provided so as to be able to be pushed into the cylinder, and a tip portion provided with a trigger. 5, a plunger 6 linked to the upper part and a vertical cylinder
And a valve member 7 provided inside the large-diameter portion 17a. The large-diameter portion 32a has a small-diameter portion 32b raised from the center of the upper surface. A bar-shaped base portion 32 which vertically partitions the inside of the vertical tube, and an upward skirt-shaped suction member which protrudes from the lower portion of the outer periphery of the base portion and whose outer peripheral edge is closely fitted to the inner periphery of the large-diameter cylindrical portion 17a below the first communication hole c. A valve plate 33, and an upwardly skirt-shaped discharge valve plate 34 protruding from the outer periphery of the small-diameter portion 32b and having an outer peripheral edge closely fitted to the inner periphery of the small-diameter cylindrical portion 17b above the second communication hole d. The trigger type liquid ejection pump is characterized in that:

In the pump according to the second aspect of the present invention, the trigger 5 has the upper portion pivotally attached to both sides of the front portion of the injection cylinder so as to hang down, and the elastic plates 24 which are horizontally longer than the pivoted portion extend integrally. And a trigger in which the upper surface of the rear portion of each elastic plate abuts and locks on the lower surface of a locking step e formed on both sides of the vertical cylinder 17. The plunger 6 is provided so as to be able to be pushed into the cylinder. The trigger type liquid ejection pump according to claim 1 is a plunger whose part is connected to the upper part of the trigger 5 so as to be able to rotate in accordance with the swing of the trigger 5.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. As shown in the drawings, the trigger type liquid ejection pump 1 of the present invention includes a mounting cap 2, a connecting cylinder member 3, a pump body 4, a trigger 5, a plunger 6, and a valve member 7.

The mounting cap 2 is fitted to the mouth and neck portion 9 of the container body 8 to fix the entire pump to the container body 8. In this embodiment, the upper end edge of the peripheral wall 10 fitted to the mouth and neck portion 9 is used. The flange-shaped top plate 11 is further extended inward.

The connecting cylinder member 3 is a member for connecting the pump body 4 and the mounting cap 2. In this embodiment, the connecting cylinder member 3 has a flange 12 sandwiched between the top plate 11 and the upper surface of the container neck 9. The top wall 14 extends from the upper edge of the peripheral wall 13 that is more protruded, and the upper end of the
Is hanging down. This pipe fitting tube 15 is
The upper end is opened at the center of a fitting recess a formed by recessing the rear part downward in a circular shape. This pipe fitting tube 15
The upper end of the pipe 16 is fitted therein, and the lower end is hung down into the container. In addition, a concave groove b1 for forming the outside air introduction passage b and a through hole b2 formed in the front part of the top wall 14 in communication with the concave groove b1 are provided at the front upper surface of the top wall 14.

The pump body 4 is fitted and fixed on a mounting cap, and a vertical cylinder 17 erecting from the upper end of the mounting cap.
A cylinder 18 is protruded forward from an intermediate portion of the cylinder, and an injection cylinder 19 is protruded forward from the upper portion. A second communication hole d communicating with the inside of the cylinder is formed in the small-diameter cylinder portion 17b constituting the upper portion of the vertical cylinder.

In this embodiment, the lower end of the large-diameter tube portion 17a of the vertical tube 17 passes through the rear portion of the top plate 21 extending from the upper end of the fitting tube 20 fitted on the outer periphery of the peripheral wall 13 of the connecting tube member 3. The protruding portion is made to protrude, and this protruding portion is closely fitted to the inner side surface of the fitting recess a. Further, a bar-shaped projection 22 for contacting and locking the upper surface of the valve member 7 is provided vertically from the center of the lower surface of the top plate portion of the small-diameter cylindrical portion 17b. Further, a through hole b3 communicating with the concave groove b1 is formed in a rear portion of the cylinder 18 which shares a part with the top plate 21, and an outside air introduction passage b is formed together with the concave groove b1 and the through hole b2. . A nozzle head 23 is fitted and fixed to the tip of the injection cylinder 19.

The trigger 5 is pivotally attached to the front of the injection cylinder 19 so as to be pivotally attached to the upper part thereof. In this embodiment, the trigger 5 is pivotally attached to the front of the injection cylinder 19 to hang down. , A horizontally elongated elastic plate 24 is integrally extended rearward from the pivotally attached portion,
In addition, the rear upper surface of each elastic plate 24 is configured to abut against the lower surface of the locking step e formed on both sides of the vertical cylinder 17.

In the present embodiment, the inner surface of the upper end portion is
The front edges of a pair of vertically long side plates 25 pivotally attached to both sides are connected by a front plate 26 except for a part of an upper part thereof, and the elastic plates 24 are integrally formed rearward from a rear edge upper end of each side plate 25. The trigger 5 is extended. Further, the locking step e is provided with a vertical cylinder 17.
Although it is configured as a downward step formed on the lower surface of the pair of projections 27 protruding at the upper portions on both sides, a simple downward step may be formed as an engagement step at the upper portion on both sides of the vertical cylinder.

The plunger 6 is provided so as to be able to be pushed into the cylinder and has a leading end linked to the upper part of the trigger 5. In this embodiment, the plunger 6 is provided so as to be able to be pushed into the cylinder and the leading end is swingable. It is connected to the upper part of the trigger so as to be able to rotate according to, and both are linked. In the present embodiment, an annular sliding portion 28 slidably fitted to the inner surface of the cylinder 18 is protruded from the outer peripheral rear end of a cylindrical main body 29 having a rear end opening, and a rod-like connection is formed from the center of the front surface of the main body 29. Part 30
Are configured to protrude.

The linkage between the plunger 6 and the trigger 5 is such that a spherical fitting hole f is formed in the rear surface of a columnar projection 31 projecting rearward from the upper rear surface of the front plate 26 of the trigger, and a rod-shaped connecting portion 30 at the tip of the plunger 6 is formed. A spherical fitting portion g is formed at the tip, and the fitting portion g
Are forcibly fitted into the fitting hole f so as to be rotatable and unable to come out, so that they can be rotatably connected in accordance with the swing of the trigger 5, whereby the plunger 6 is pushed straight. It is configured as follows. These linkages are not limited to the above-described configuration.For example, the both ends of the plunger are pivotally attached to the inner surfaces of both side plates of the trigger, and the projection of the pivoted portion is formed with a concave portion, for example, in an elliptical shape so that the projection can move slightly. You can also do this.

With this configuration, the plunger 6 pushed back by the trigger operation can be returned forward without using a conventional metal coil spring. However, in the present invention, a metal or other coil spring is used. May be used to bias the plunger forward. In this case, it is sufficient to use a trigger of a normal form in which the upper portion is pivotally attached to the front portion of the injection cylinder and vertically swingably provided.

When the trigger 5 is pulled forward while the elastic plate 24 is elastically deformed from the state shown in FIG. 1, the plunger 6 pressed through the connecting portion is pushed backward, and then the pressing of the trigger 5 is released. Thus, the trigger 5 is returned to the original state by the elastic restoring force of the elastic plate 24, and the plunger 6 is pulled back to return to the original state.

The valve member 7 has a large-diameter portion 32a in which an upper portion of the outer periphery is tightly fixed to a lower portion of the inner periphery of the small-diameter cylindrical portion 17b.
b, and a base 32 for vertically partitioning the inside of the vertical cylinder 17 by projecting from the lower part of the outer periphery of the base 32, and having an outer peripheral edge closely fitted to the inner periphery of the large-diameter cylindrical part 17a below the first communication hole c. And an upward skirt-shaped suction valve plate 33 protruding from the outer periphery of the small-diameter portion 32b and having an outer peripheral edge closely fitted to the inner periphery of the small-diameter cylindrical portion 17b above the second communication hole d. And a valve plate 34.

In the present embodiment, the base 32 has a hollow rod shape with a lower end opening with a reduced diameter at the upper end, and the pipe fitting tube 15 is provided on the upper surface of the top wall 14 of the connecting tube member 3 constituting the bottom surface of the vertical tube 17. The lower surface of each of the support legs 35 projecting from the lower surface in the circumferential direction is made to abut, and the gap between each of the support legs 35 is configured as a liquid flow hole h. Also, the upper surface of the small diameter portion 32b is in contact with the lower surface of the rod-shaped projection 22.

In the case of using the pump constructed as described above, when the trigger 5 is pulled forward, the plunger 6 moves rearward, the liquid in the cylinder 18 is pressurized, and the discharge valve plate 34 shrinks. Elastic deformation. The pressurized liquid moves upward from the gap between the deformed discharge valve plate 34 and the vertical cylinder 17,
It is ejected from the ejection port of the nozzle head 23 via the injection cylinder 19. Next, when the pressing of the trigger 5 is released, each elastic plate 24 is released.
The trigger 5 returns to the original state due to the elastic restoring force, and the plunger 6 is pulled back along with this, and returns to the original state. At this time, the pressure in the cylinder 18 becomes negative because the plunger 6 moves forward, and the discharge valve plate 34 is restored to the original state, and the suction valve plate 33 is elastically deformed so as to be narrow, and the pipe valve 16 passes through the pipe 16. The introduced liquid in the container is introduced into the cylinder 18 through the gap. In addition, outside air is introduced through the outside air introduction passage b into the container body which is made negative pressure as the liquid decreases. In the figure, reference numeral 36 denotes a cover fitted to the pump body. In addition, each of the above members can be formed using a synthetic resin, and can be formed using an elastomer or the like as needed.

[0025]

As described above, the trigger type liquid jet pump according to the present invention has the above-described structure, and particularly, the large diameter portion 32a in which the outer peripheral upper end is closely fitted and fixed to the inner peripheral lower end of the small diameter cylindrical portion 17b. A rod-shaped base portion 32 that vertically divides the inside of the vertical cylinder by raising a small-diameter portion 32b from the center of the upper surface, and a protruding portion from the lower portion of the outer periphery of the base portion and an outer peripheral edge formed on the inner periphery of the large-diameter cylindrical portion 17a below the first communication hole c. An upwardly skirt-shaped suction valve plate 33 tightly fitted, and an upwardly skirt-shaped discharge protruding from the outer periphery of the small-diameter portion 32b and having an outer peripheral edge closely fitted to the inner periphery of the small-diameter cylindrical portion 17b above the second communication hole d. Since the valve member 7 including the valve plate 34 is provided, by mounting the valve member, the suction valve and the discharge valve can be formed uniformly. Very good valve function without using a metallic ball It is those that can be.

An upper portion is pivotally attached to both sides of the front portion of the injection cylinder so as to hang down, and an elastic plate which is horizontally elongated backward from the pivoted portion.
24 are extended integrally, and the upper surface of the rear of each elastic plate is
17 A trigger 5 abutted and locked on the lower surface of the locking step e formed on both sides, and a trigger 5 is provided so as to be able to be pushed into the cylinder, and the tip can rotate in accordance with the swing of the trigger 5. The plunger 6 connected to the plunger 6 does not need to use a metal coil spring as in the related art, and the plunger can be smoothly reciprocated. Therefore, there is an advantage that it can be formed without using a metal member as a whole.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing one embodiment of a trigger type liquid ejection pump according to the present invention.

[Explanation of symbols]

2 mounting cap, 4 pump body, 5 trigger, 6
... Plunger, 17 ... Vertical cylinder, 17a ... Large diameter cylinder, 17b ... Small diameter cylinder, 18 ... Cylinder, 19 ... Injection cylinder, 24 ... Elastic plate, 32 ... Base, 32a ... Large diameter, 32b ... Small diameter, 33… Suction valve plate,
34: discharge valve plate, c: first communication hole, d: two bullet holes, e ...
Locking step

Claims (2)

[Claims] 1. A mounting cap 2 fitted on the outer periphery of the neck of a container body, and a cylinder 18 is fitted and fixed on the mounting cap, and a cylinder 18 is inserted from an intermediate portion of a vertical cylinder 17 rising from the upper end of the mounting cap. A first communication hole c communicating with the inside of the cylinder is formed in a large-diameter cylindrical portion 17a forming the lower portion of the vertical cylinder, and a small-diameter cylindrical portion 17b forming the upper portion of the vertical cylinder is formed in the injection cylinder 19 from the front. A pump body 4 having a second communication hole d communicating with the inside of the cylinder, a trigger 5 pivotally mounted on the front of the injection cylinder so as to be pivotally mounted on an upper portion thereof, and a trigger 5 capable of being pushed into the cylinder. At the same time, set the tip
A plunger 6 linked to the upper part and a valve member 7 provided in the vertical cylinder 17 are provided. The valve member 7 has a large-diameter portion in which the outer peripheral upper end is tightly fixed to the inner peripheral lower end of the small-diameter cylindrical portion 17b. A rod-shaped base portion 32 that vertically divides the inside of the vertical cylinder by raising a small-diameter portion 32b from the center of the upper surface, and a large-diameter cylindrical portion 17a protruding from the lower part of the outer periphery of the base and having an outer peripheral edge below the first communication hole c. And a small-diameter cylindrical portion 17b projecting from the outer periphery of the small-diameter portion 32b and having an outer peripheral edge above the second communication hole d.
A trigger type liquid ejection pump characterized by comprising an upward skirt-shaped discharge valve plate 34 closely fitted to the inner periphery. 2. The trigger 5 has an upper portion pivotally attached to both sides of a front portion of the injection cylinder and is suspended therefrom. At the same time, a horizontally elongated elastic plate 24 is integrally extended backward from the pivotally attached portion. A trigger whose rear upper surface abuts and locks on the lower surface of a locking step portion e formed on both sides of the vertical cylinder 17. The plunger 6 is provided so as to be able to be pushed into the cylinder, and the tip portion is used to swing the trigger 5. 2. The trigger type liquid ejection pump according to claim 1, wherein said plunger is connected to an upper portion of said trigger so as to be able to rotate together.