JPH1043648A - Trigger type pump dispenser - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a trigger type pump dispenser capable of performing not only the emitting operation of an emitting nozzle but also that of a pump main body at a fixed position. SOLUTION: A guide cylinder 25 is provided to a cover cap 4 in a protruding state and the upper end of a piston member 6 is liquidtightly fitted in the guide cylinder 25 in a freely slidable manner and the passage 30 of the piston member 6 is allowed to communicate with an emitting nozzle 7 through the guide cylinder 25 and a shaking lever 41 is provided between the trigger lever 5 and the piston member 6 in a freely shakable manner and one shaking end of the shaking lever 41 is engaged with the trigger lever 5 and the other shaking end thereof is engaged with the piston member 6 and the shaking motion of the trigger lever 5 is converted to the reciprocal motion of the piston member 6 through the shaking lever 41.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pump dispenser capable of dispensing and discharging contents such as a liquid laundry detergent and a softening agent by one hand, and more particularly to a trigger type pump dispenser operated by pulling a trigger with a finger. .

[0002]

2. Description of the Related Art Recent automatic washing machines are equipped with a storage section in which a liquid detergent and a softening agent are filled in advance. Conventional filling work of liquid detergent, etc. is a work process of once pouring liquid detergent etc. into the measuring cup attached to the bottle, weighing, checking the liquid amount on the scale, and then pouring it into the washing machine,
It was a very laborious task.

Therefore, there is a demand for a pump dispenser which can pour out a predetermined amount of liquid from a container with one touch and fill it into a washing machine or the like.

[0004] As a pump dispenser for dispensing a predetermined amount of liquid with one touch, a trigger type pump dispenser as described in Japanese Patent Application Laid-Open No. 5-133322 is known.

[0005] That is, a pump body inserted and fixed into the container from the container opening, and a cover cap attached to the outside of the container so as to cover the container opening, are operated by operating a trigger lever provided on the cover cap. A piston member in the pump body is driven to discharge the content liquid from a discharge nozzle provided on the cover cap.

In this conventional example, a nozzle head provided with a discharge nozzle is movable, and by pulling a trigger lever, a nozzle head portion is pushed down via a swing lever, and a piston is moved by the nozzle head. It was configured to push down.

[0007]

However, the above-mentioned conventional trigger type pump dispenser can be operated with one touch and is convenient. However, since the nozzle head is depressed, when the trigger lever is operated, the discharge nozzle is also reduced. It moves up and down and cannot be poured at a specific point. For this reason, it has been impossible to aim and discharge a narrow opening of the detergent storage section of the washing machine.

On the other hand, a trigger type pump dispenser in which a discharge nozzle is located at a fixed position is also known (see Japanese Patent Publication No. Hei 6-31115).

This is because the conventional pump dispenser drives the piston in the pump body to compress the liquid in the pump chamber, but fixes the piston and moves the pump body up and down. .

In this way, the discharge nozzle at the tip of the piston shaft can be held at a fixed position, and the target liquid can be discharged in a targeted manner.

However, according to this conventional example, since the pump main body in the container moves up and down, the liquid inlet of the pump main body moves up and down, and the suction of the content liquid into the pump main body becomes unstable. was there.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems of the prior art.
An object of the present invention is to provide a trigger-type pump dispenser capable of performing a discharge operation while a discharge nozzle and a pump main body remain in a fixed position.

[0013]

In order to achieve the above object, according to the present invention, there is provided a pump body which is inserted and fixed into a container from a container opening, and is provided outside the container so as to cover the container opening. A cover cap to be attached, a piston member in the pump body is driven by operating a trigger lever provided on the cover cap, and the content is discharged from a discharge nozzle provided on the cover cap through a passage provided on the piston member. In a trigger-type pump dispenser that discharges a liquid, a hollow guide cylinder that communicates with the discharge nozzle protrudes from the cover cap, and the upper end of the piston member is slidably fitted to the guide cylinder in a liquid-tight manner. The passage of the piston member communicates with the discharge nozzle through the guide cylinder, while the trigger lever and the piston portion The swing lever is provided so as to be swingable, and one swing end of the swing lever is engaged with the trigger lever, and the other swing end is engaged with the piston member. The dynamic motion is converted into a reciprocating motion of the piston member via the swing lever.

According to the present invention, when the trigger lever is operated, the swing lever engaged with the operating end of the trigger lever swings to drive the piston member, thereby compressing the inside of the pump body, The contents liquid is discharged through the discharge nozzle through the passage of the member.

Even if the piston member moves in this way, the piston member only slides with respect to the guide cylinder fixed to the cover cap, and the discharge nozzle portion is held at a fixed position.
Further, since the pump body fixed in the container is also held at a fixed position, the liquid content is stably sucked into the pump body.

The fitting portion of the piston member to the guide cylinder is slidably fitted to the inner cylinder portion slidably and liquid-tightly inserted into the inner periphery of the guide cylinder and to the outer periphery of the guide cylinder. It has a double cylinder structure with an outer cylinder part.

With this configuration, the piston member is guided twice along the inner circumference and the outer circumference of the guide cylinder by the inner cylinder part and the outer cylinder part, and moves smoothly.

In particular, since the swinging motion of the swinging lever is converted into a linear reciprocating movement of the piston member, the force applied to the piston member from the swinging lever is applied to a direction orthogonal to the moving direction of the piston member. However, since the upper portion of the piston member is doubly supported, rattling is prevented.

The swinging end of the swinging lever is bifurcated so as to sandwich the guide cylinder from the left and right, and is engaged with two left and right portions of the piston member.

When the swinging end of the swinging lever is bifurcated, a force can be applied to the second piston portion in a well-balanced manner, and the piston member can be moved smoothly.

After the discharge is completed, the suction valve is closed and the discharge valve is kept open for a certain period of time after the piston member starts to rise from the bottom dead center, and the inside of the pump body is set to a negative pressure to maintain the pressure inside the discharge nozzle. The residual liquid is sucked into the pump body.

This makes it possible to prevent liquid dripping from the discharge nozzle portion.

The piston member is slidably in close contact with the inner periphery of the pump main body, and is connected to the first piston portion and protrudes above the upper end of the pump main body and slides on the guide cylinder. A second piston portion that fits freely and a seal member that seals a gap between an outer periphery of the second piston portion and an inner periphery of an upper end opening of the pump body is provided at an upper end opening of the pump body; An air hole is provided for communicating the upper space of the pump body closed by the seal member and the first piston portion with the internal space of the container,
The second piston portion is provided with a slit extending in the vertical direction by a predetermined length, and when the lower end of the slit is located on the cover cap side with respect to the seal member, the seal member allows the content liquid from the pump body to flow. Prevents leakage and allows the flow of air between the internal space and the external space of the container through the slit and the air hole when the lower end of the slit is located on the pump body side with respect to the seal member. It is characterized by having done.

With this configuration, when the lower end of the slit is in a free state in which the lower end of the slit is located on the cover cap side with respect to the seal member, the leakage of the content liquid is prevented by the seal member. On the other hand, even if the inside of the container is depressurized by the movement of the piston member, the depressurized state in the container is eliminated through the slit and the air hole.

[0025]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on the illustrated embodiment.

FIG. 1 shows a trigger-type pump dispenser according to an embodiment of the present invention. The trigger type pump dispenser 1 includes a pump body 3 inserted and fixed into the container 2 from an opening of the container 2, and a cover cap 4 attached to the outside of the container 2 so as to cover the opening of the container 2. .

A trigger lever 5 is swingably attached to the cover cap 4. By operating the trigger lever 5, the piston member 6 in the pump body 3 is driven, and a passage 30 provided in the piston member 6 is provided. The content liquid is discharged from a discharge nozzle 7 provided on the cover cap 4 through the cover.

The pump body 3 is a substantially bottomed cylindrical member having a pump chamber 8 formed therein, and a piston member 6 is inserted into the pump body 3 so as to be reciprocally movable. A spring 10 is provided between the piston member 6 and the bottom wall of the pump body 3 to urge the piston member 6 in a direction to increase the volume in the pump chamber 8.

The upper end of the pump body 3 is provided with a flange portion 11 which engages with the mouth and neck portion 2a of the container 2, and this flange portion 11 is fixed by a fixing cap 12 to a sealing member 13.
Is fixed to the mouth and neck 2a in a liquid-tight manner. An annular wall 14 projecting further upward projects from the inner diameter end of the flange portion 11, and the cover cap 4 is fixed to the annular wall 14.

The bottom wall of the pump body 3 is provided with a suction port 15 for sucking the liquid inside the container 2 into the pump chamber 8, and the opening edge of the suction port 15 has a dip as a liquid suction passage. Tube 16 is connected. The lower end of the dip tube 16 extends to the bottom of the container 2. The suction port 15 is provided with a suction valve 17.

The suction valve 17 includes a valve seat 18 provided at an opening edge of the suction port 15 inside the pump chamber 8, a valve body 19 that can be brought into contact with and separated from the valve seat 18, and the valve body 19 which is always connected to the valve seat 18. And a spring 20 that presses and biases the spring.

The cover cap 4 has an inner hollow head portion 21 and a neck portion 23 extending downward from the lower end of the head portion 21 and fitted to the annular wall 14 of the pump body 3. The head portion 21 extends long to the side, and an opening 24 is formed at a side end thereof. On the other hand, the head portion 21 is provided with a guide cylinder 25 projecting downward from the top wall 22.

The guide cylinder 25 is located on the same axis as the pump main body 3, and has a cylindrical projection 26 integrally projecting from the top wall 22 of the head 21, and a lower end of the cylindrical projection 26. The discharge nozzle 7 linearly extends from the cylindrical projection 26 to the side opening 24. A nozzle cap 12 is attached to the tip of the discharge nozzle 7 so as to be openable and closable.

The piston member 6 has a passage 3 penetrating in the axial direction.
0 is a hollow member provided with a first piston portion 31 slidably fitted to the inner periphery of the pump body 3 in a liquid-tight manner, and is slidable on the guide cylinder 25 located at the upper end of the piston member 6. And a second piston portion 32 fitted to the second piston portion 32. The first piston portion 31 and the second piston portion 32 are separately inserted and connected to each other.

The second piston portion 32 is an inner cylinder portion 33 which is slidably inserted into the cylinder 27 of the guide cylinder 25 in a liquid-tight manner.
And an outer cylinder portion 34 slidably fitted on the outer periphery of the guide cylinder 25. And the inner cylinder part 3
The upper end of 3 is a seal part 33a which is enlarged in diameter and slidably contacts the inner periphery of the cylinder 27.

The second piston portion 32 of the piston member 6 enters the head portion 21 from the upper end of the pump body 3, and the upper end of the pump body 3 is provided with a sealing member slidably in contact with the outer periphery of the second piston portion 32. 35 are attached. The outer end of the seal member 35 is fixed to the upper end of the pump body 3, and the inner lip portion 35 a is slidably in close contact with the outer periphery of the second piston portion 32. Lip 35
a is inclined toward the inside of the pump body 3.

The pump body 3 has an air hole 9a communicating the upper chamber 9 of the pump body 3 closed by the seal member 35 and the first piston portion 31 with the internal space 37 of the container 2.
A plurality of slits 36 are provided on the outer periphery of the second piston portion 32, in the illustrated example, on the outer cylinder portion 34, and extend vertically by a predetermined length.

The lower end of this slit 36 is
When the seal member 35 is located on the side of the cover cap 4, the sealing member 35 prevents leakage of the content liquid from the pump body 3, and the lower end of the slit 36 is located on the pump body 3 side with respect to the seal member 35 Allows air to flow between the internal space 37 of the container 2 and the external space on the cover cap 4 side via the slit 36 and the air hole 9a.

The upper end of the trigger lever 5 is inserted into the opening 24 of the head 21 from below.
The upper ends of the left and right side walls 3 of the head portion 21 via the pivot point 5a
8, 38 are swingably connected. An operation projection 39 serving as an operation end is provided at an upper end of the trigger lever 5. The lower edge of the operation projection 39 is engaged with the opening edge of the lower wall 40 of the head portion 21 to restrict the rotation of the trigger lever 5 in the opening direction.

On the other hand, in the space between the trigger lever 5 and the second piston portion 32 in the head portion 21, a swing lever 41 is swingably provided via a pivot point 41a.

The swing lever 41 has one first swing arm 42.
Engages with the upper edge of the operation projection 39 of the trigger lever 6, the other second swing arm 43 engages with the piston member 6, and converts the swing motion of the trigger lever 5 into a reciprocating motion of the piston member 6. It has become. The first swing arm 42 of the swing lever 41 is horizontally held with the trigger lever 6 opened and in a free state, and the second swing arm 43 has a hypotenuse 44 extending obliquely upward from the pivot 41a, and this hypotenuse 44 And a horizontal piece 45 extending horizontally from the upper end of the horizontal section.

The lower surface 46 of the first swing arm 42 is engaged with the action projection 39 of the trigger lever 5. This first swing arm 42
The lower surface 46 is an arc surface that is convex downward.

The second swing arm 43 is bifurcated so as to sandwich the guide cylinder 25 from the left and right.
An engagement protrusion 48 is provided on the upper surface of an engagement flange 47 provided at the upper end of the outer cylinder portion 34 of the piston portion 32 so as to engage at two right and left locations. The shape of the engaging projection 48 is formed in an arc shape. The engagement projection 48 slides on the engagement flange 47 with the swing of the swing lever 41, but the engagement flange 47 is smoothly moved by being formed in an arc shape. Even when the swing lever 41 swings and the angle changes, the engaging projection 48 is formed in an arc shape, so that the engaging flange 47 is formed.
A constant contact state is always maintained.

On the other hand, the cylinder 2 forming the guide cylinder 25
A discharge valve 50 is provided in 7. This discharge valve 50
Is a check valve that basically allows the flow of liquid in the discharge direction and prevents the backflow of liquid, and includes a valve seat 51, and a check ball 52 disposed downstream of the valve seat 51 in the discharge direction. It is composed of This check ball 52
Is normally seated on the valve seat 51 by its own weight. Also,
A stopper 53 projecting downward is provided on the upper bottom of the cylindrical projection 26 of the guide cylinder 25 so that the check ball 52 does not block the entrance of the discharge nozzle 7.

The discharge valve 50 basically prevents the backflow of the liquid. However, by delaying the timing until the check ball 52 falls and sits down, the suck-back is activated after the discharge is completed. A function of returning the content liquid remaining in the discharge nozzle 7 to the inside of the pump body 3 is provided.

In the present invention, when the trigger lever 5 is pulled down with a finger, the trigger lever 5 rotates counterclockwise in the figure around the pivot point 5a at the upper end, and its action projection 39
Pushes up the first swing arm 42 of the swing lever 41. The swinging lever 41 rotates clockwise in the figure around its pivot point 41 a, and the piston member 6 is moved by the engaging projection 48 at the tip of the second swinging arm 43 via the engaging flange 47. It is pushed down.

Thus, the liquid in the pump chamber 8 is compressed by the first piston portion 31 fitted on the inner periphery of the pump body 3. This compression force causes the check ball 52 of the discharge valve 50 to float, and the content liquid is discharged to the outside through the passage 30 in the piston member 6, the passage in the guide cylinder 25, and the discharge nozzle 7 (FIG. 3B). reference).

Thereafter, the piston member 6 reaches the bottom dead center and the discharge is completed (see FIG. 3C). When the trigger lever 40 is released after the discharge is completed, the piston member 6 is pushed up by the spring force of the spring 10, and The inside of the pump chamber 8 of the pump body 3 has a negative pressure opposite to that at the time of discharge.

Accordingly, the check ball 52 of the discharge valve 50 descends by its own weight, but the suction valve 17 is kept closed until it is seated on the valve seat 51. Therefore, until the suction valve 17 is opened, the residual liquid in the discharge nozzle 7 is drawn by the negative pressure in the pump chamber 8 and the remaining liquid in the discharge nozzle 7 is drawn.
It is possible to prevent liquid dripping from the tip of the discharge nozzle 7, and it is also effective in preventing solidification of the content liquid. When the discharge valve 50 is closed and the negative pressure in the pump chamber 8 reaches a predetermined pressure, the suction valve 17 is opened and suction of the content liquid into the pump chamber 8 is started, and when the piston member 6 reaches the top dead center, suction is performed. The operation ends. The top dead center position is determined by the action projection 39 of the trigger lever 5 being engaged with the lower wall 40 of the head 21.

Even if the piston member 6 moves as described above,
The piston member 6 is a guide cylinder 2 fixed to the cover cap 4.
By simply sliding with respect to 5, the discharge nozzle 7 is held at a fixed position. Further, since the pump body 3 fixed in the container 2 is also held at a fixed position, the content liquid is stably sucked into the pump body 3.

The second piston portion 32 on the upper part of the piston member 6 fitted to the guide cylinder 25 has an inner cylindrical portion 33 and an outer cylindrical portion 3.
4, the guide tube 25 is guided twice along the inner and outer circumferences of the guide tube 25, and moves smoothly.

In particular, since the swinging motion of the swinging lever 41 is converted into a linear reciprocating motion of the piston member 6, the force applied to the piston member 6 from the swinging lever 41 is limited to the moving direction of the piston member 6. Although a component in a direction orthogonal to the above acts, the backlash is prevented because the guide tube 25 above the piston member 6 is doubly supported.

The second swinging arm 43, which is the swinging end of the swinging lever 41, is bifurcated so as to sandwich the guide cylinder 25 from the left and right, and communicates with the engaging projection 48 at the tip of the second swinging arm 43. A well-balanced force is applied to the engagement flange portion 47 of
The piston member 6 can be moved smoothly.

Next, the operation of the seal member 35 and the slit 36 provided in the piston member 6 will be described.

At the top dead center of the piston member 6, it is located on the head portion 21 side with respect to the seal member 35, and the leakage of the content liquid is prevented by the seal member 35 (FIG. 3).
(A)).

On the other hand, in the discharge step, the piston member 6
Until the piston member 6 descends from the top dead center by a predetermined distance, the piston member 6 descends while being sealed by the seal member 35, so that the volume of the upper chamber 9 of the pump body 3 is expanded, and the air The pressure in the internal space 37 of the container 2 is reduced through the hole 9a (see FIG. 3B). When the piston member 6 descends a predetermined distance, the lower end of the slit 36 passes through the seal member 35, and the upper chamber 9 in the pump body 3 and the space on the side of the head portion 21 communicate with each other through the slit 36, and the decompression state is eliminated. (See FIG. 3C).

In the suction step, while the lower end of the slit 36 is positioned below the seal member 35, the air flows into the container 2 by the volume of the content liquid sucked into the pump chamber 8, so that the container There is no pressure reduction inside.
From the position where the lower end of the slit 36 has passed through the seal member 35 to the top dead center, the piston member 6 rises a predetermined distance while being sealed by the seal member 35. In the meantime, the pressure in the container 2 is reduced by the volume of the content liquid sucked into the pump chamber 8, but the reduced pressure is eliminated at the next discharge operation.

The lip 35a of the seal member 35 can be opened by the pressure difference between the upper chamber 9 of the pump body 3 and the external space to eliminate the reduced pressure.

[0059]

As described above, according to the present invention, the piston member is slidably fitted to the guide cylinder fixed to the cover cap, and the movement of the trigger lever is controlled via the swing lever. Since the inside of the pump body is driven by converting the reciprocating motion of the piston member, the piston member only slides with respect to the guide cylinder fixed to the cover cap, and the discharge nozzle portion is held at a fixed position. Further, since the pump body fixed in the container is also held at a fixed position, the liquid content is stably sucked into the pump body.

Further, the fitting portion of the piston member with the guide cylinder has a double cylinder structure of an inner cylinder portion and an outer cylinder portion, so that the piston member is doubled along the inner circumference and the outer circumference of the guide cylinder. You will be guided and move smoothly.

In particular, since the swinging motion of the swinging lever is converted into a linear reciprocating movement of the piston member, the force applied to the piston member from the swinging lever is applied to the direction orthogonal to the moving direction of the piston member. However, since the upper portion of the piston member is doubly supported, rattling is prevented.

If the swinging end of the swinging lever is bifurcated so as to sandwich the guide cylinder from the left and right, the force can be applied to the piston member in a well-balanced manner, and the piston member can be moved smoothly.

Further, the suction valve is closed and the discharge valve is kept open for a certain period of time after the piston member has risen from the bottom dead center, and the pressure inside the pump main body is reduced to a negative pressure to maintain the residual liquid in the discharge nozzle. Is provided in the pump body to prevent dripping from the discharge nozzle.

If a seal member is provided at the upper end opening of the pump body to contact the second piston portion and a slit extending in the second piston portion by a predetermined length in the vertical direction is provided, the lower end of the slit in the free state is It is located on the cover cap side with respect to the seal member, so that leakage of the content liquid can be prevented, and when the piston member is pushed in, the lower end of the slit is located on the pump body side with respect to the seal member, eliminating the depressurized state in the container can do.

[Brief description of the drawings]

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

FIGS. 2A to 2F are views showing the swing lever of FIG. 1;

3 (a) to 3 (c) are explanatory diagrams of the operation of the trigger type pump dispenser of FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Trigger type pump dispenser 2 Container 3 Pump body 4 Cover cap 5 Trigger lever 6 Piston member 7 Discharge nozzle 8 Pump chamber 9 Upper chamber of pump body 9a Air hole 10 Spring 15 Suction port 17 Suction valve 21 Head part 25 Guide cylinder 27 Cylinder DESCRIPTION OF SYMBOLS 30 Passage 31 1st piston part 32 2nd piston part 33 Inner cylinder part 34 Outer cylinder part 35 Seal member 36 Slit 37 Inner space of container 39 Working projection 41 Swing lever 48 Engagement projection 50 Discharge valve

Claims (5)

[Claims] A pump body inserted into and fixed to the container from the container opening; and a cover cap attached to the outside of the container so as to cover the container opening, and a trigger lever provided on the cover cap is operated. A trigger type pump dispenser that drives a piston member in the pump body and discharges a liquid content from a discharge nozzle provided in the cover cap through a passage provided in the piston member, wherein the cover cap communicates with the discharge nozzle. Along with projecting a hollow guide cylinder, the upper end of the piston member is slidably fitted to the guide cylinder in a liquid-tight manner, and the passage of the piston member communicates with the discharge nozzle through the guide cylinder. On the other hand, a swing lever is swingably provided between the trigger lever and the piston member, and one of the swing levers is swingable. An end is engaged with the trigger lever, and the other swinging end is engaged with the piston member, and the swinging motion of the trigger lever is converted into a reciprocating motion of the piston member via the swinging lever. Trigger-type pump dispenser. 2. A fitting portion of the piston member to the guide tube is slidably fitted to the inner tube portion slidably and liquid-tightly inserted into the inner periphery of the guide tube and to the outer periphery of the guide tube. 2. The trigger type pump dispenser according to claim 1, wherein the trigger type pump dispenser has a double cylinder structure with an outer cylinder portion. 3. The swinging end of the swinging lever according to claim 1, wherein the swinging end of the swinging lever is bifurcated so as to sandwich the guide cylinder from the left and right, and engages with two left and right portions of the piston member. Trigger type pump dispenser. 4. After the discharge is completed, the suction valve is closed and the discharge valve is kept open for a certain period of time after the piston member has started to rise from the bottom dead center, so that the inside of the pump body is set to a negative pressure to discharge the discharge nozzle. The liquid remaining in the pump is sucked into the pump body.
4. The trigger-type pump dispenser according to claim 1. 5. A piston member slidably contacting an inner periphery of a pump body and a first piston portion connected to the first piston portion and protruding above an upper end of the pump body to slide on a guide cylinder. A second piston portion that fits freely, a seal member that seals a gap between an outer periphery of the second piston portion and an inner periphery of an upper end opening of the pump body is provided at an upper end opening of the pump body; An air hole communicating between the seal member and the upper chamber of the pump body closed by the first piston portion and the internal space of the container, and the second piston portion extends vertically by a predetermined length. When a slit is provided, when the lower end of the slit is located on the cover cap side with respect to the seal member, leakage of the content liquid from the pump body is prevented by the seal member. The air flow between the internal space and the external space of the container is allowed through the slit and the air hole when the seal member is located on the pump body side with respect to the seal member. 5. The trigger type pump dispenser according to 2, 3, or 4.