JP2008284410A - Spring, spring for pump dispenser and pump dispenser provided with the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a spring which is light in weight, is easily incorporated in a pump dispenser and can surly applying a restorative force to the pump. <P>SOLUTION: The spring is a cylindrical spring 10 comprising a synthetic resin and has a left bellows part 15 and a right bellows part 16 which are adjacent to each other and a bellows-shaped wall surface 11 flexible in the longitudinal direction. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a spring, a spring for a pump dispenser, and a pump dispenser including the spring.

  There is known a pump dispenser in which a discharge liquid stored in a predetermined container is caused to flow from a supply pipe into a discharge liquid storage portion, and the discharge liquid is discharged from a predetermined nozzle port by a pump action.

By the way, in this pump dispenser, a spring is generally provided in order to apply a force for restoring the pump (hereinafter referred to as “pump restoring force”).
As such a spring, a coil-shaped spring is known (for example, see Patent Document 1).
JP-A-2005-118724

However, since the conventional spring for pump dispensers including the spring described in Patent Document 1 has a coil shape, there is a drawback that it is easily caught on the components of the pump dispenser when incorporated in the pump dispenser.
Further, when the spring is made of metal, there is a drawback that the weight is increased.

  The present invention has been made in view of the above circumstances, and an object thereof is to provide a spring for a pump dispenser that is lightweight, can be easily incorporated into a pump dispenser, and can reliably impart a pump restoring force.

  The present inventor has intensively studied to solve the above problems, and found that the above problems can be solved at once by making the wall surface into a bellows shape made of a synthetic resin so as to be stretchable in the longitudinal direction. The present invention has been completed.

  That is, the present invention is (1) a cylindrical spring made of synthetic resin, in which the left bellows portion and the right bellows portion are adjacent to each other, and the wall surface is bellows so that it can be expanded and contracted in the longitudinal direction. Lies in the spring.

  The present invention is (2) a cylindrical pump dispenser spring made of synthetic resin, in which the left bellows portion and the right bellows portion are adjacent to each other, and the wall surface has a bellows shape so that it can expand and contract in the longitudinal direction. Exists in the spring for the pump dispenser.

In the present invention, (3) the left bellows part and the right bellows part are connected via a hinge part,
In the spring for a pump dispenser according to the above (2), the left bellows portion and the right bellows portion are adjacent to each other by folding the hinge portion as a center.

  The present invention resides in (4) the spring for a pump dispenser according to the above (3), wherein the left bellows portion and the right bellows portion are symmetrical with respect to the hinge portion.

  This invention exists in the spring for pump dispensers of said (2) description in which the cylindrical mounting part for attaching to a pump dispenser is formed in (5) upper end.

  This invention exists in the spring for pump dispensers of said (2) description in which the distribution port for the discharge liquid to distribute | circulate is formed in (6) bottom face.

  In the present invention, (7) the left bellows portion and the right bellows portion are connected via a plurality of hinge portions, a flow port for flowing the discharge liquid is formed on the bottom surface, and the flow port is a hinge. It exists in the spring for pump dispensers of the said (3) description located between parts.

  The present invention resides in (8) the spring for a pump dispenser according to the above (2), wherein the synthetic resin is polyethylene or polypropylene.

  This invention exists in a pump dispenser provided with the spring for pump dispensers as described in any one of (9) said (2)-(8).

  In addition, as long as the objective of this invention is met, the structure which combined said (1) to (9) suitably is also employable.

Since the spring of the present invention is made of synthetic resin, it is light in weight and does not rust like metal.
Further, according to the spring, the left bellows portion and the right bellows portion are adjacent to each other, and the wall surface is in a bellows shape so that it can be expanded and contracted in the longitudinal direction. is there.
Furthermore, when taking out one of many stored springs, the springs can be easily taken out without being entangled.
Incidentally, the conventional coiled springs are easily caught and easily entangled with each other.

  In particular, in the spring, if the synthetic resin is polyethylene or polypropylene, it is not only excellent in elasticity and durability, but also can be manufactured inexpensively and easily by injection molding.

Further, when the spring is a spring for a pump dispenser used in a pump dispenser, in addition to the above-described effects, it is difficult to be caught in other parts, so that it can be easily incorporated into the pump dispenser.
Further, the pump dispenser spring can adjust the pump restoring force by appropriately selecting the thickness and material.

When the spring for a pump dispenser of the present invention is composed of a hinge part and a left bellows part and a right bellows part provided on the left and right sides of the hinge part, the left bellows part and the right bellows part are only folded around the hinge part. Thus, it is possible to reliably give the pump restoring force.
Therefore, in this case, it is possible to manufacture more inexpensively and easily by injection molding.

Further, the pump dispenser spring is automatically folded between the left bellows portion and the right bellows portion by being incorporated into a cylindrical cylinder of the pump dispenser from the central hinge portion.
Therefore, in this case, the incorporation into the pump dispenser becomes even easier.

  Here, in the pump dispenser spring, when the left bellows portion and the right bellows portion are symmetrical with respect to the hinge portion, the pump restoring force is uniform in the longitudinal direction when the pump dispenser spring expands and contracts. Therefore, a sufficient amount of discharge liquid can be sucked or discharged.

  In the spring for a pump dispenser of the present invention, when a cylindrical mounting portion for attaching to the pump dispenser is formed at the upper end, even if the spring expands and contracts, the mounting portion does not deform, so that the mounting stability is sufficiently ensured. Is done.

The spring for a pump dispenser of the present invention does not hinder the flow of the discharge liquid when a flow port for flowing the discharge liquid is formed on the bottom surface.
It can also be used as an insertion port for a leak valve.

  In the spring for a pump dispenser of the present invention, the left bellows portion and the right bellows portion are connected via a plurality of hinge portions, a flow port for flowing the discharge liquid is formed on the bottom surface, and the flow port If it is located between hinge parts, it can manufacture still more cheaply and easily by injection molding.

  The spring for a pump dispenser is suitably used for a vertical press type pump dispenser or a trigger type pump dispenser.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings as necessary.
In the drawings, the same elements are denoted by the same reference numerals, and redundant description is omitted.
Further, the positional relationship such as up, down, left and right is based on the positional relationship shown in the drawings unless otherwise specified.
Further, the dimensional ratios in the drawings are not limited to the illustrated ratios.

A spring for a pump dispenser (hereinafter simply referred to as “spring”) according to the present embodiment is used for a pump dispenser.
Here, in the present invention, the pump dispenser refers to a dispenser that sucks a discharge liquid stored in a predetermined container or discharges a discharge liquid from a nozzle port based on expansion or contraction of the volume of the pump.
The spring has a pump restoring force when the volume of the pump is expanded or contracted.

  1A is a front view showing an example of a spring according to the present embodiment, FIG. 1B is a cross-sectional view of the spring shown in FIG. c) is a bottom view of the spring shown in FIG.

As shown to (a) of FIG. 1, as for the spring 10 which concerns on this embodiment, the wall surface 11 has a bellows form.
The wall surface 11 is made of a synthetic resin.
Therefore, the spring 10 can be expanded and contracted in the longitudinal direction, is lightened, and does not rust like metal.

Here, the synthetic resin is not particularly limited, and examples thereof include polyethylene, polypropylene, polyamide, polyester, and polyacetal.
In addition to these, various elastomers and synthetic rubbers may be used.
When the synthetic resin is any of these compounds, it is not only excellent in elasticity and durability, but also can be produced inexpensively and easily by injection molding.
Among these, the synthetic resin is preferably recyclable polyethylene or polypropylene.

As shown in FIGS. 1B and 1C, the spring 10 is formed in a cylindrical shape with the inside of the wall surface 11 being hollow.
A circulation port 13 is provided on the bottom surface.
Therefore, when the spring 10 is used for the pump dispenser, the discharge liquid A easily flows from the flow port 13 and flows through the wall surface 11.
The circulation port 13 also serves as a later-described leak valve insertion port (see FIGS. 4 and 6).
Therefore, the spring 10 has a pump restoring force and does not hinder the flow of the discharge liquid A.

2A is a front view showing a state in which the spring according to the present embodiment is contracted, and FIG. 2B is a cross-sectional view of the spring shown in FIG.
As shown in FIGS. 2A and 2B, the spring 10 contracts when the wall surface 11 is deformed.
Therefore, the spring 10 can adjust the pump restoring force by appropriately selecting the thickness and material of the wall surface 11.

FIG. 3 is a development view of the spring according to the present embodiment.
As shown in FIG. 3, the spring 10 includes a left bellows portion 15 and a right bellows portion 16.
And the said spring 10 is formed by both adjoining.
At this time, since the wall surface of the spring 10 is formed in a bellows shape, the spring 10 can be expanded and contracted in the longitudinal direction.

Further, the left bellows portion 15 and the right bellows portion 16 are connected via a plurality of hinge portions 12.
Therefore, the left bellows portion 15 and the right bellows portion 16 are easily adjacent to each other by folding the hinge portion 12 around the hinge portion 12.
At this time, the left bellows portion 15 and the right bellows portion 16 are not necessarily bonded.
When the spring 10 is incorporated in the pump dispenser, the adjacent state between the left bellows portion 15 and the right bellows portion 16 is maintained due to the presence of the hinge portion 12.
By making the left bellows portion 15 and the right bellows portion 16 adjacent to each other, a stable pump restoring force can be applied reliably.

In the spring 10, the left bellows portion 15 and the right bellows portion 16 are symmetric with respect to the hinge portion 12.
Thus, since the left bellows part 15 and the right bellows part 16 are symmetrical, the pump restoring force works uniformly in the longitudinal direction when the spring expands and contracts.
Moreover, since the left bellows part 15 and the right bellows part 16 are positioned when making it adjoin by interposing the hinge part 12, a pump restoring force can be exhibited reliably.

A semi-cylindrical mounting portion 18 is formed at the upper end of each of the left bellows portion 15 and the right bellows portion 16.
Accordingly, the spring 10 in which the left bellows portion 15 and the right bellows portion 16 are adjacent to each other is formed with a cylindrical mounting portion at the upper end for attachment to a pump dispenser (for example, a pump portion).
As described above, since the spring 10 includes the mounting portion at the upper end, the mounting portion does not deform even when the spring 10 expands and contracts, and the mounting stability is sufficiently ensured.

Further, the above-described circulation ports 13 are formed on the bottom surfaces of the left bellows portion 15 and the right bellows portion 16, respectively.
Therefore, the spring 10 in which the left bellows portion 15 and the right bellows portion 16 are adjacent to each other is formed with a circulation port for the discharge liquid to circulate on the bottom surface.
In addition, this distribution port is located between the two hinge parts 12.

In the spring 10, a slide core or the like can be omitted by injection molding, and a simple mold structure can be obtained.
Therefore, it can be manufactured more inexpensively and easily.

Such a spring 10 is suitably used for a pump dispenser of a vertical pressing type or a trigger type.
When the spring 10 is incorporated into the pump dispenser, the left bellows portion 15 and the right bellows portion 16 are automatically (necessarily) folded by being inserted into the pump dispenser from the central hinge 12 side. Overlaid.
Thus, the spring 10 is much easier to incorporate into the pump dispenser.

  Next, an example in which the spring 10 according to the present embodiment is used in a trigger type pump dispenser will be described.

FIG. 4 is a partial sectional view showing an example in which the spring according to the present embodiment is used for a trigger type pump dispenser, and FIG. 5 is a partial sectional view showing a state in which the trigger of the trigger type pump dispenser shown in FIG. 4 is pulled. It is.
As shown in FIG. 4, the trigger type pump dispenser 20 is provided between a discharge liquid supply pipe 21, a cylinder 22 communicating with the discharge liquid supply pipe 21, and between the discharge liquid supply pipe 21 and the cylinder 22. Leak which is provided so as to be slidable along the inner wall of the valve 26 and the cylinder 22 and has a piston flow path 29 inside, and a leak which is provided in the cylinder 22 and can seal the piston flow path 29 A valve 28, a nozzle portion 24 communicated with the piston flow path 29, a nozzle port 27 provided at the tip of the nozzle portion 24 and capable of discharging discharge liquid, and a trigger 25 connected to the piston 23 are provided.

  Further, in the trigger type pump dispenser 20, a spring 10 for restoring the piston 23 upward is provided in the cylinder 22 when the piston 23 moves downward, that is, when the pump volume contracts. The leak valve 28 is inserted in the spring 10.

As shown in FIG. 5, in the trigger type pump dispenser 20, when the trigger 25 is pulled, the piston 23 moves downward and the spring 10 contracts.
At this time, the leak valve 28 opens the piston flow path 29, and the valve 26 seals between the discharge liquid supply pipe 21 and the cylinder 22.

On the other hand, when the trigger 25 is released, the piston 23 moves upward by the pump restoring force of the spring 10.
At this time, since a second valve (not shown) seals the piston flow path 29, the inside of the cylinder 22 becomes negative pressure, and the valve 26 opens between the discharge liquid supply pipe 21 and the cylinder 22.
At this time, the discharge liquid flows into the cylinder 22 from a predetermined container.

When the trigger 25 is pulled again, the action is performed as described above, and the discharge liquid flows through the spring 10, then flows through the piston flow path, and flows into the nozzle portion 24.
Further, the discharge liquid that has flowed into the nozzle portion 24 is discharged from the nozzle port 27.

In the trigger pump dispenser 20, the discharge liquid is continuously discharged by repeating such an operation.
As mentioned above, since the trigger type pump dispenser 20 includes the spring 10 that is lightweight and can reliably apply the pump restoring force, the trigger type pump dispenser 20 is excellent in handleability and can suck or discharge a sufficient amount of discharge liquid.

  Next, the example which used the spring 10 which concerns on this embodiment for the up-down press type pump dispenser is demonstrated.

FIG. 6 is a partial cross-sectional view showing an example in which the spring according to the present embodiment is used for an up-down press pump dispenser, and FIG. 7 shows a state where the nozzle portion of the up-down press pump dispenser shown in FIG. 6 is pushed down. It is a fragmentary sectional view.
As shown in FIG. 6, the up-down pressing pump dispenser 30 is provided between a discharge liquid supply pipe 31, a cylinder 32 communicating with the discharge liquid supply pipe 31, and between the discharge liquid supply pipe 31 and the cylinder 32. The valve 36 is provided so as to be slidable along the inner wall of the cylinder 32, and the piston 33 having the piston flow path 39 therein and the cylinder 32 are provided so as to seal the piston flow path 39. A second valve 38, a nozzle portion 34 communicating with the piston flow path 39, and a nozzle port 37 provided at the tip of the nozzle portion 34 and capable of discharging the discharge liquid are provided.

  Further, in the vertical push pump dispenser 30, a spring 10 for restoring the piston 33 upward is provided in the cylinder 32 when the piston 33 moves downward, that is, when the pump volume contracts.

As shown in FIG. 7, in the vertical press pump dispenser 30, when the nozzle portion 34 is pushed down, the piston 33 moves downward and the spring 10 contracts.
At this time, the second valve 38 opens the piston flow path 39, and the valve 36 seals between the discharge liquid supply pipe 31 and the cylinder 32.

On the other hand, when the nozzle part 34 is opened, the piston 33 moves upward by the pump restoring force of the spring 10.
At this time, since the second valve 38 seals the piston flow path 39, the inside of the cylinder 32 becomes negative pressure, and the valve 36 opens between the discharge liquid supply pipe 31 and the cylinder 32.
At this time, the discharge liquid flows into the cylinder 32 from a predetermined container.

When the nozzle portion 34 is pushed down again, it acts as described above, and the discharge liquid flows through the spring 10 and then flows through the piston flow path and flows into the nozzle portion 34.
Further, the discharge liquid that has flowed into the nozzle portion 34 is discharged from the nozzle port 37.

In the up-down press pump dispenser 30, the discharge liquid is continuously discharged by repeating such an operation.
As described above, the vertical pressing pump dispenser 30 includes the spring 10 that is lightweight and can reliably apply the pump restoring force. Therefore, it is excellent in handleability and can suck or discharge a sufficient amount of discharge liquid.

  The preferred embodiment of the present invention has been described above, but the present invention is not limited to the above embodiment.

  For example, although the spring 10 according to the present embodiment has two hinge portions 12, the number may be one or three or more.

In the spring 10 according to the present embodiment, the left bellows portion 15 and the right bellows portion 16 are symmetric with respect to the hinge portion 12, but may not be symmetric.
That is, the number of uneven pitches on the wall surface may be different between the left bellows portion and the right bellows portion, and the size of the unevenness may be different between the left bellows portion and the right bellows portion.

Moreover, the latching | locking part (for example, male part and female part) may be provided in the front-end | tip part of a left bellows part and a right bellows part, respectively.
In this case, the left bellows part and the right bellows part can be fixed.

As an example using the spring 10 according to the present embodiment, the trigger type pump dispenser 20 and the vertical pressing type pump dispenser 30 are illustrated, but the present invention is not limited thereto, and may be used for other pump dispensers and the like.
Moreover, as long as it is a part which can exhibit the elastic effect of a spring, it is applicable to various apparatuses other than a pump dispenser.

The spring for a pump dispenser of the present invention is not limited to the spring 10 according to the present embodiment, and may have the following form.
For example, FIG. 8-10 (a) is a front view which shows the spring which concerns on other embodiment, (b) of FIGS. 8-10 is those sectional drawings.
As shown in FIGS. 8A and 8B, the wall surface 11a may be a trapezoidal bellows.
Moreover, as shown to (a) and (b) of FIG. 9, the wall surface 11b may be a screw-shaped bellows.
Furthermore, as shown to (a) and (b) of FIG. 10, the wall surface 11c may be a abacus ball-shaped bellows.

1A is a front view showing an example of a spring according to the present embodiment, FIG. 1B is a cross-sectional view of the spring shown in FIG. c) is a bottom view of the spring shown in FIG. 2A is a front view showing a state in which the spring according to the present embodiment is contracted, and FIG. 2B is a cross-sectional view of the spring shown in FIG. FIG. 3 is a development view of the spring according to the present embodiment. FIG. 4 is a partial cross-sectional view showing an example in which the spring according to the present embodiment is used in a trigger type pump dispenser. FIG. 5 is a partial cross-sectional view showing a state where the trigger of the trigger type pump dispenser shown in FIG. 4 is pulled. FIG. 6 is a partial cross-sectional view showing an example in which the spring according to the present embodiment is used in a vertical press pump dispenser. FIG. 7 is a partial cross-sectional view showing a state in which the nozzle portion of the up-down pressing pump dispenser shown in FIG. 6 is pushed down. FIG. 8A is a front view showing a spring according to another embodiment, and FIG. 8B is a cross-sectional view of the spring shown in FIG. FIG. 9A is a front view showing a spring according to another embodiment, and FIG. 9B is a cross-sectional view of the spring shown in FIG. FIG. 10A is a front view showing a spring according to another embodiment, and FIG. 10B is a cross-sectional view of the spring shown in FIG.

Explanation of symbols

10 ... Spring (Spring for pump dispenser)
DESCRIPTION OF SYMBOLS 11, 11a, 11b, 11c ... Wall surface 12 ... Hinge part 13 ... Distribution port 15 ... Left bellows part 16 ... Right bellows part 18 ... Mounting part 20 ... Trigger type pump Dispenser 21, 31 ... Discharge liquid supply pipe 22, 32 ... Cylinder 23, 33 ... Piston 24, 34 ... Nozzle part 25 ... Trigger 26, 36 ... Valve 27, 37 ...・ Nozzle port 28 ... Leak valve 29,39 ... Piston flow path 30 ... Vertical pressure pump dispenser 38 ... Second valve A ... Discharge liquid

Claims (9)

A cylindrical spring made of synthetic resin,
The left bellows and right bellows are adjacent,
A spring characterized in that the wall surface is in a bellows shape so that it can expand and contract in the longitudinal direction. A spring for a cylindrical pump dispenser made of synthetic resin,
The left bellows and right bellows are adjacent,
A spring for a pump dispenser, characterized in that the wall surface has a bellows shape so as to be expandable and contractable in the longitudinal direction. The left bellows part and the right bellows part are connected via a hinge part,
The pump dispenser spring according to claim 2, wherein the left bellows part and the right bellows part are adjacent to each other by folding the hinge part around the hinge part.   4. The pump dispenser spring according to claim 3, wherein the left bellows part and the right bellows part are symmetrical with respect to the hinge part.   The spring for a pump dispenser according to claim 2, wherein a cylindrical mounting portion for attaching to the pump dispenser is formed at an upper end.   The spring for a pump dispenser according to claim 2, wherein a flow port for flowing the discharge liquid is formed on the bottom surface. The left bellows part and the right bellows part are connected via a plurality of hinge parts,
The spring for a pump dispenser according to claim 3, wherein a flow port for flowing the discharge liquid is formed on a bottom surface, and the flow port is located between the hinge portions.   The spring for a pump dispenser according to claim 2, wherein the synthetic resin is polyethylene or polypropylene.   A pump dispenser comprising the spring for a pump dispenser according to any one of claims 2 to 8.

Images