JPH1142450A - Trigger 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 discarded while minimizing use of metallic members, capable of being formed without greatly changing the shape of the conventional pump of this kind, with the plunger easily returned and with the spouting part easily dripped. SOLUTION: A valve member 6 of special structure is fitted in a vertical cylinder 11 to form the suction valve and delivery valve without using a spherical valve member, a laterally-long elastic sheet 26 is integrally extended backward from a pivoting part to impart resiliency to a trigger 4, and the tip of a plunger 5 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 container body communicates with the inside of the vertical cylinder through a suction pipe fitted to the lower end of the vertical cylinder, and a communication hole formed in the vertical cylinder. Through the cylinder and the vertical cylinder and the injection cylinder and the vertical cylinder to form a liquid flow path from the container to the injection cylinder. An example is provided in which a discharge valve is provided.

[0003] 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.

In a conventional pump of this type, the plunger is normally biased forward 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.

[0005]

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 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. In addition, the present invention proposes an excellent trigger type liquid ejection pump which can be formed without greatly changing the form of a conventional pump of this kind, has excellent return capability of the plunger, and has a good discharge of the ejection port. Things.

[0008]

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 is fitted and fixed on the mounting cap. A cylinder 12 is protruded forward from an intermediate portion of the vertical cylinder 11 rising from the upper end of the mounting cap, and an injection cylinder 13 is protruded forward from the upper part thereof, and the lower part of the vertical cylinder is a large diameter part 11a, and the upper part of the vertical cylinder is a small diameter part. 11b, the upper part is pivotally attached to both sides of the front part of the injection cylinder to be hung down, and the horizontal elastic plates 26 are respectively integrally extended rearward from the pivoted part. A trigger 4 having the rear upper surface of the elastic plate abutted and locked on the lower surface of a locking step g formed on both sides of the vertical cylinder 11, and a trigger which is provided so as to be able to be pushed into the cylinder and has a tip portion adapted to swing of the trigger 4. Plunger 5 connected to the upper part of the trigger to enable movement A valve member 6 provided in the vertical cylinder 11. The valve member 6 has a plurality of elastic legs 35, the lower surfaces of which are in contact with the bottom plate of the large-diameter portion 11 a, being vertically suspended from the lower peripheral edge and standing upright from the upper surface. The rod-shaped valve 36 is provided such that the upper end of the provided rod valve 36 is openably and closably fitted into a valve hole j at the center of a partition 37 provided laterally above the vertical cylinder 11 and is capable of being pushed down against the elastic force of each elastic leg 35. A base 38 and a large diameter portion projecting from the lower portion of the outer periphery of the base and having an outer peripheral edge
11a Upward skirt-shaped suction valve plate closely fitted to the inner circumference
39, the base 38 protrudes from the upper part of the outer periphery, and the outer periphery is
b A trigger-type liquid ejection pump characterized by comprising an upward skirt-shaped discharge valve plate 40 closely fitted to the inner periphery.

A pump according to a second aspect of the present invention is provided with a first passage b for introducing outside air having one end opened at the rear portion of the inner surface of the cylinder and the other end communicating with the inside of the mounting cap. A second passage c is provided in the rear cylinder inner surface, one end being opened and the other end communicating with the inside of the mounting cap 2,
Further, a concave portion d is formed in the inner surface of the cylinder behind the opening of the second passage, and the plunger 5 is slidably fitted on the inner periphery of the cylinder, and an annular second sliding portion 30 behind the annular first sliding portion. Moving part
When the outer peripheral edge of the second sliding portion 31 reaches the concave portion d by pushing the plunger, the outer peripheral edge of the first sliding portion 30 is connected to the first passage opening and the second passage opening. The trigger type liquid ejection pump according to claim 1, wherein the second passage c and the concave portion d are configured to communicate with each other.

[0010]

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 pump body 3, a trigger 4, a plunger 5, and a valve member 6. The mounting cap 2 is attached to the mouth and neck 8 of the container 7.
In this embodiment, a flange-shaped top wall 10 is provided to extend inward from the upper edge of the peripheral wall 9 to be fitted to the mouth and neck portion 8. doing.

The pump body 3 is fitted and fixed on the mounting cap, and the vertical cylinder 11 standing upright from the upper end of the mounting cap.
The cylinder 12 is protruded forward from the middle of the cylinder, and the injection cylinder 13 is protruded forward from the upper part.
In addition, the upper portion of the vertical cylinder is formed in the small diameter portion 11b.

In this embodiment, the pump body 3 is connected to the mounting cap 2 by a connecting cylinder member 14. The connecting cylinder member 14 has a peripheral wall having a flange 15 protruding from the outer periphery between the mounting cap top wall 10 and the upper surface of the container body neck 8.
A top wall 17 extends from an upper end edge of the pipe 16, and an upper end is opened in the top wall 17 and a pipe fitting tube 18 is hung downward. The pipe fitting cylinder 18 has an upper end opening at the center of a fitting recess a formed by recessing a rear portion of the top wall 17 downward in a circular shape. The upper end of the pipe 19 is fitted into the pipe fitting cylinder 18, and the lower end is hung down into the container. A first passage b for introducing outside air and a second passage c communicating between the inside of the cylinder and the inside of the mounting cap for reducing the pressure inside the cylinder in a pressurized state are formed at the front portion of the top wall 17. Through holes 20 are formed.

The pump body 3 in this embodiment penetrates a rear portion of a top plate 22 extending from an upper end of a fitting tube 21 fitted on an outer peripheral upper portion of a peripheral wall 16 of a connecting tubular member 14, and has a large vertical cylinder 11. The lower end of the diameter portion 11a is protruded, and this protruding portion is closely fitted to the inner side surface of the fitting recess a. In addition, a pair of through holes 2 communicating with the through holes 20 are provided at the rear of the cylinder 12 which shares a part with the top plate 22.
Holes 3 and 24 are drilled at predetermined intervals in the front and rear.
3 together with the first passage b, and the through hole 20 and the through hole 2
4 together with the second passage c. A recess d is provided on the inner surface of the cylinder 12 behind the through hole 24. Further, communication holes e and f are formed in the upper portion of the large-diameter portion 11a and the lower portion of the small-diameter portion 11b to communicate with the inside of the cylinder. Also,
A nozzle head 25 is fitted and fixed to the tip of the injection cylinder 13.

The trigger 4 has an upper portion pivotally attached to both sides of the front portion of the injection cylinder 13 and hangs down. At the same time, a horizontally elongated elastic plate 26 is integrally extended rearward from the pivotally attached portion. The upper surface is in contact with the lower surface of the locking step g formed on both sides of the vertical cylinder 11. In the present embodiment, a pair of vertically long side plates 27 whose inner surfaces at the upper ends are pivotally attached to both sides of the injection cylinder 13 are connected to each other by a front plate 28 except for a part of an upper part thereof. The trigger 4 is constituted by integrally extending the elastic plates 26 backward from the upper end of the edge. The locking step g is configured as a downward step formed on the lower surface of the pair of protrusions 29 protruding from both sides of the vertical cylinder 11 at the upper portion. It may be formed on both upper sides.

The plunger 5 is provided so as to be able to be pushed into the cylinder, and the tip is connected to the upper part of the trigger so as to be rotatable in accordance with the swing of the trigger 4 to link the two. In the present embodiment, an annular first sliding portion 30 and an annular second sliding portion 31 slidably fitted on the inner surface of the cylinder 18.
The main body 32 has a rear end opening and is provided with a predetermined interval from the outer peripheral rear portion of the main body 32 and a rod-shaped connecting portion 33 is protruded from the center of the front surface of the main body 32. The positions of the first sliding portion 30 and the second sliding portion 31 are determined when the plunger 5 is located at the forefront.
An opening of the first passage b and an opening of the second passage c are located between the outer peripheral edge of the first sliding portion and the outer peripheral edge of the second sliding portion. Is configured such that the outer peripheral edge of the first sliding portion 30 is located between the first passage opening and the second passage opening when reaches the concave portion d.

The linkage between the plunger 5 and the trigger 4 is such that a spherical fitting hole h is formed in the rear surface of a columnar projection 34 projecting rearward from the upper rear surface of the trigger front plate 28, and a rod-shaped connecting portion 33 at the tip of the plunger 5 is provided. A spherical fitting portion i is formed at the tip, and the fitting portion i
Is forcibly fitted into the fitting hole h so as to be rotatable and unable to come out, so that it is rotatably connected in accordance with the swing of the trigger 4, whereby the plunger 5 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 5 pushed by the trigger operation
Is configured to be able to return to the front without using a conventional metal coil spring.

When the trigger 4 is pulled forward while the elastic plate 26 is elastically deformed from the state shown in FIG. 1, the plunger 5 pressed through the connecting portion is pushed backward, and then the pressing of the trigger 4 is released. Thus, the trigger 4 is returned to the original state by the elastic restoring force of the elastic plate 26, and the plunger 5 is pulled back to return to the original state.

The valve member 6 has a plurality of elastic legs 35, whose lower surfaces are in contact with the bottom plate of the large diameter portion 11a, suspended from the lower peripheral edge, and the upper end of a rod valve 36, which is erected from the upper surface, is placed above the vertical cylinder 11. A rod-shaped base 38 which is fitted openably and closably in a valve hole j at the center of a laterally provided partition wall 37 and which can be pushed down against the elastic force of each elastic leg 35, and protrudes from a lower part of the outer periphery of the base. And the outer periphery is a large diameter part
11a Upward skirt-shaped suction valve plate closely fitted to the inner circumference
39, the base 38 protrudes from the upper part of the outer periphery, and the outer periphery is
b An upward skirt-shaped discharge valve plate 40 closely fitted to the inner periphery.

In this embodiment, the base 38 has a hollow rod shape with a lower end opening having a reduced diameter at the upper end, and the pipe fitting tube 18 is provided on the upper surface of the top wall 17 of the connecting tube member 14 constituting the bottom plate of the vertical tube 11. The lower surface of the elastic leg 35 projecting plurally in the circumferential direction from the lower surface is abutted around the upper end opening of the elastic leg 35. In the case of using the pump configured as described above, when the trigger 4 is pulled forward, the plunger 5 moves rearward, the liquid in the cylinder 12 is pressurized, and the discharge valve plate 40 is elastically deformed so as to shrink. .
The pressurized liquid moves upward from the gap between the deformed discharge valve plate 40 and the vertical cylinder 11, and at this time, due to the diameter difference between the discharge valve plate 40 and the suction valve plate 39, the base portion 38 The valve hole j is opened by being pushed downward against the force of the ejection, and is ejected from the ejection port of the nozzle head 25 through the injection cylinder 13. When the outer peripheral edge of the second sliding portion 31 reaches the concave portion d, the inside of the cylinder communicates with the inside of the container via the second passage c, so that the inside of the cylinder is decompressed, and the base portion 38 is resilient by the elastic force of each elastic leg 35. When pushed up, the valve hole j is closed by the rod valve 36.

Next, when the pressing of the trigger 4 is released, the trigger 4 is returned to the original state by the elastic restoring force of each elastic plate 26, and the plunger 5 is pulled back along with this to return to the original state. At this time, the pressure in the cylinder 12 becomes negative because the plunger 5 moves forward, and the suction valve plate 39 is elastically deformed so that the liquid inside the container introduced through the pipe 19 passes through the gap. Into the cylinder 12. In addition, outside air is introduced into the container body, which becomes negative pressure as the liquid decreases, via the first passage b. In the drawing, reference numeral 41 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.

[0021]

As described above, the trigger type liquid jet pump according to the present invention has the above-mentioned structure, and in particular, a plurality of elastic legs 35 whose lower surfaces are in contact with the bottom plate of the large diameter portion 11a are arranged from the lower surface periphery. At the same time, the upper end of the rod valve 36 erected from the upper surface is fitted openably and closably into a valve hole j at the center of a partition 37 provided horizontally above the vertical cylinder 11 and resists the elastic force of each elastic leg 35. And a push-down rod-shaped base 38, an upward skirt-shaped suction valve plate 39 protruding from the lower part of the outer periphery of the base, and having an outer peripheral edge closely fitted to the inner periphery of the large-diameter part 11a. Since the valve member 6 includes the upwardly projecting skirt-shaped discharge valve plate 40 which is protruded and whose outer peripheral edge is closely fitted to the inner periphery of the small diameter portion 11b, the suction valve and the discharge valve are formed uniformly. And greatly simplifies assembly, and uses a metal ball-shaped valve as before. Ide, are those that can demonstrate a very good valve function.

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 rearward from the pivoted portion.
26 are extended integrally, and the upper surface of the rear of each elastic plate is
11 Trigger 4 abutted on the lower surface of the locking step g formed on both sides and provided so as to be able to be pushed into the cylinder, and the tip can be rotated in accordance with the swing of trigger 4 at the upper part of the trigger. The provision of the connected plunger 5 eliminates the need for a conventional metal coil spring, and allows the plunger to reciprocate smoothly.
Therefore, a pump having the same function as the conventional pump can be formed without using any metal member as a whole.

A first passage b for introducing outside air is provided at one end of the inner surface of the cylinder at the rear portion, and the other end communicates with the inside of the mounting cap. One end is opened at the inner surface of the cylinder behind the opening of the first passage. The other end is provided in the mounting cap 2 with a second passage c, and a recess d is formed in the inner surface of the cylinder behind the opening of the second passage. The plunger 5 is slidably fitted on the inner periphery of the cylinder. The plunger is provided with an annular first sliding portion 30 and an annular second sliding portion 31 at the rear thereof, and the plunger is pushed into the second sliding portion 31.
When the outer peripheral edge reaches the concave portion d, the outer peripheral edge of the first sliding portion 30 is located between the first passage opening and the second passage opening so that the second passage c communicates with the concave portion d. In addition to the above effects, the pressure in the cylinder is reduced at the end of the pushing of the plunger and the valve hole j is closed, so that the effect of the good drainage of the liquid at the ejection port is exhibited.

[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, 3 pump body, 4 trigger, 5
... plunger, 6 ... valve member, 11 ... vertical cylinder, 11a ... large diameter part,
11b: small diameter portion, 12: cylinder, 13: injection cylinder, 26: elastic plate, 30: first sliding portion, 31: second sliding portion, 35: elastic leg, 36
... rod valve, 37 ... partition wall, 38 ... rod-shaped base, 39 ... suction valve plate,
40: discharge valve plate, b: first passage, c: second passage, d: recess, g: locking step, j: valve hole

Claims (2)

[Claims] 1. A mounting cap 2 fitted on the outer periphery of the neck of a container body, and a cylinder 12 is fitted and fixed on the mounting cap, and a cylinder 12 is inserted from an intermediate portion of a vertical cylinder 11 rising from the upper end of the mounting cap. , The injection cylinder 13 projects forward, and the lower part of the vertical cylinder is the large diameter part 11a, and the upper part of the vertical cylinder is the small diameter part.
11b, the upper part is pivotally attached to both sides of the front part of the injection cylinder to be hung down, and the horizontal elastic plates 26 are respectively integrally extended rearward from the pivoted part. A trigger 4 having the rear upper surface of the elastic plate abutted and locked on the lower surface of a locking step g formed on both sides of the vertical cylinder 11, and a trigger which is provided so as to be able to be pushed into the cylinder and has a tip portion adapted to swing of the trigger 4. It comprises a plunger 5 movably connected to the upper part of the trigger, and a valve member 6 provided in the vertical cylinder 11, wherein the valve member 6 has a plurality of elastic legs whose lower surfaces abut on the bottom plate of the large diameter portion 11a. The upper end of a rod valve 36 erected from the upper surface is fitted in a valve hole j at the center of a partition 37 provided horizontally above the vertical cylinder 11 so as to be openable and closable, and each elastic leg 35 A rod-shaped base portion 38 provided so as to be able to be pushed down against the resilience; Skirt-shaped suction valve plate 39 closely fitted to the inner periphery of the large-diameter portion 11a, and an upward skirt-shaped discharge valve protruding from the upper periphery of the base 38 and having the outer periphery closely fitted to the inner periphery of the small-diameter portion 11b. A trigger type liquid ejection pump characterized by comprising a plate 40. 2. A first passage b for introducing outside air, one end of which is opened at the rear of the inner surface of the cylinder and the other end of which is communicated with the inside of the mounting cap.
And a second passage c having one end opened on the inner surface of the cylinder behind the opening of the first passage and the other end communicating with the inside of the mounting cap 2, and a concave portion d on the inner surface of the cylinder behind the opening of the second passage. And the plunger 5 is configured as a plunger having an annular first sliding portion 30 slidably fitted on the inner periphery of the cylinder and an annular second sliding portion 31 behind the same. When the outer peripheral edge of the second sliding portion 31 reaches the concave portion d by pushing in, the outer peripheral edge of the first sliding portion 30 is located between the first passage opening and the second passage opening, and the second passage c
2. The trigger type liquid ejection pump according to claim 1, wherein the trigger-type liquid ejection pump is configured to communicate with the concave portion d.