JPH0740514U - dispenser - Google Patents

Abstract

(57) [Abstract] [Purpose] All components can be made plastic without lowering the biasing force of the return spring. [Structure] The return spring 22 is formed of a highly elastic plastic in a shape in which a plurality of elastic pieces 22a having a closed cross section are integrally connected in a plurality of stages. And each elastic piece 22a is
It is formed into a tubular shape having a hollow portion 42 having a substantially elliptical shape, and the thickness of the both lateral ends is made thinner by the notches 44 than the other portions of the elastic piece.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 This device is installed in the mouth of a container containing liquid, and sucks the liquid previously sucked into the cylinder inside the cylinder under the sliding movement of the piston with respect to the cylinder that is interlocked with the operation of the nozzle head or the trigger. The present invention relates to a push-type and trigger-type dispenser that pressurizes and discharges.

[0002]

[Prior art]

 For example, a so-called push-type dispenser that causes the liquid (contents) in the container to flow out from the nozzle by pushing the nozzle head at the upper end is used as a dispenser to be attached to containers such as shampoo and rinse, and also to pull the trigger. The so-called trigger type dispenser, which causes the liquid to flow out from the nozzle by means of a dispenser, is well known as a dispenser to be attached to a container for various cleaning liquids.

[0003] Such a dispenser is normally constructed by sliding a piston inside a cylinder, which is interlocked with the operation of a nozzle head and a trigger that resist the biasing force of a return spring, and a liquid that has been sucked up beforehand from a container into the cylinder. , Are configured to pressurize in the cylinder and flow out from the nozzle.

[0004]

[Problems to be solved by the device]

 By the way, in this type of dispenser, a metal compression coil spring is generally used as a return spring, and a metal member such as a steel ball is generally used as a primary valve for controlling the flow of liquid between a cylinder and a container. Is being used for.

However, if the constituent member includes a metal member, heating and melting cannot be performed in the state as it is, so that it is very difficult to reuse the material of the dispenser which is desired for environmental protection and the like. Becomes In addition, in a dispenser including a metal member, the metal member is required to be removed in advance at the time of disposal, and therefore the disposal itself of the dispenser cannot be easily performed.

Therefore, a configuration in which the return spring and the primary valve are molded from plastic is known in the known trigger type dispenser and push type dispenser. With such a configuration, since the dispenser does not include a metal member, it is not necessary to separate and dispose of it, and it is possible to easily dispose of it and reuse the material.

[0007] Here, in the return spring in which the wire made of plastic is simply formed into a coil shape, the biasing force is weak, and the biasing force necessary for the biasing of the nozzle head, the trigger, etc. and the suction of liquid can be sufficiently obtained. Absent. Therefore, for example, a return spring in which a large number of plastic hollow pipes are juxtaposed or partially arranged and a restoring force against elastic deformation of the hollow pipe acts as a biasing force on a nozzle head or the like is known in a known configuration. (For example, Japanese Patent Laid-Open No. 05-031412).

However, since the hollow pipe has a circular cross section and is formed with a uniform wall thickness, it is easily elastically deformed in any direction, and it is difficult to stabilize the acting direction of the force in a single direction. . Therefore, the biasing force from the return spring may not be constant, and the operating force of the nozzle head or the like and the outflow amount of the liquid may vary.

As shown in FIGS. 7 (A) and 7 (B), in the hollow pipe 122a having a uniform wall thickness, both lateral ends in the direction orthogonal to the expansion / contraction direction are difficult to bend, and the deformation amount is small. Since the return spring 122 having a small-diameter hollow pipe cannot easily secure a sufficient restoring force, that is, a biasing force, because it tends to occur. In other words, in order to secure a sufficient biasing force in the dispenser with such a hollow pipe, it is unavoidable that each hollow pipe has a large diameter, that is, a large size.

In addition, since the push type dispenser is normally conveyed and displayed with the nozzle head pushed into the cylinder, the return spring is left for a long time while being compressed and deformed. However, when the thick portion of the hollow pipe is bent and left for a long time, the restoring force of the hollow pipe itself is likely to be weakened due to deterioration of the bent portion, which may reduce the function as a dispenser.

An object of the present invention is to provide a dispenser in which all constituent members are made plastic without inducing the biasing force of the return spring.

[0012]

[Means for Solving the Problems]

 In order to achieve this object, according to one embodiment of the present invention, the return spring of the dispenser is elastically formed into a shape in which elastic pieces having closed cross sections each having a restoring force are continuously connected in a plurality of stages. Molded from rich plastic. Then, each elastic piece is formed into a tubular shape having a hollow portion having a vertical width narrower than a lateral width in the expansion / contraction direction, and the thickness of the elastic pieces at both lateral ends orthogonal to the expansion / contraction direction is equal to that of the elastic piece. Is thinner than other parts of the.

[0013]

[Action]

 According to this invention, since each elastic piece is elastically deformed under the bending of the thin portions at both lateral ends, the elastic deformation direction and the restoring force acting direction are unified. Since each of the elastic pieces has a restoring force, the biasing force of the nozzle head or the like and the biasing force required for sucking up the liquid body can be sufficiently secured regardless of the plastic return spring.

[0014]

【Example】

 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

As shown in FIG. 1, the dispenser 10 according to the present invention is formed as a push type dispenser capable of pressing the nozzle head 11. The dispenser (push type dispenser) 10 is provided with a cylinder 12 and a piston 14 slidably provided in the cylinder, and is operated under sliding movement of the piston which is interlocked with the pushing of the nozzle head 11. The contents of the container 18, for example, liquids such as shampoo and rinse are made to flow out from the nozzle 11a.

As can be seen from FIG. 1, the nozzle head 11 is integrally formed with a stem 11b communicating with the nozzle 11a. Then, for example, the piston 14 is provided so as to be interlockable with the nozzle head 11 under the connection with the stem 11b of the nozzle head.

The piston 14 is formed, for example, in a bottomed tubular shape having a flow port 14a, and is fixed to the nozzle head 11 by press fitting and fitting to the lower end of the stem 11b. Then, a skirt-shaped seal piece 14b slidable inside the cylinder 12 is disposed as a part of the piston so as to be movable around the piston 14 along the axis and inseparable. The seal piece also serves as a secondary valve that controls the flow of liquid inside the cylinder by opening and closing the flow port 14a associated with the movement of the.

The nozzle head 11 and the piston 14 can be pushed in against the biasing force of the return spring 22 arranged inside the cylinder 12. The fitting of the chaplet 24 to the upper end of the cylinder 12 prevents the nozzle head 11 and the piston 14 from coming off the cylinder.

Further, the bottle cap 26 is formed, for example, with an internal thread 26a on the inner surface thereof, and is provided between the flange 12a of the cylinder 12 and the chaplet 24 so as not to be detachable and rotatable. Then, with the insertion of the cylinder 12 into the mouth of the container 18 and the screwing of the female screw 26a with the male screw 18a at the mouth of the container, the bottle cap 26, that is, the dispenser 10 is attached to the container. It is detachably attached. Instead of screwing, the bottle cap 26 may be attached to the mouth of the container 18 by pressure bonding or fitting so as not to be detachable.

In such a dispenser 10, for example, under the suction operation of the piston 14 caused by the previous use, the liquid in the container 18 enters the cylinder via the primary valve 28 at the lower end of the cylinder 12. It is sucked up beforehand.

Then, in such a state, when the nozzle head 11 is pushed in against the biasing force of the return spring 22, as shown in FIG. 2, the seal piece 14b is interlocked with the nozzle head and moves to the piston 14. It is pushed into the cylinder 12 while moving upward. Then, the secondary valve that doubles as the seal piece 14b is opened, and the liquid inside the cylinder 12 is pressurized by the piston 14.Therefore, the outflow path via the flow port 14a as shown by the arrow is set. Through and outflow from the nozzle 11a.

As shown in FIG. 1, the primary valve 28 is formed, for example, so as to be able to close the valve seat 30 at the lower end of the cylinder, and is opened and closed between the container 18 and the cylinder 12 under the opening and closing of the primary valve due to the vertical movement. It is configured to control the flow of liquid in the chamber.

Here, various components of the dispenser 10 such as the cylinder 12 and the piston 14 are usually molded from plastic, for example, thermoplastic, but in the present invention, the primary valve 18 is also molded from thermoplastic. Molded from.

Normally, the primary valve 28 is forcibly pressed against the valve seat 30 by the pressure of the liquid sucked up into the cylinder 12, etc. Therefore, even if the primary valve is made of a plastic material having a light weight, No functional decline occurs.

Further, the cylinder 12 is usually formed with a ventilation hole (negative pressure prevention hole) 34 at a predetermined position, and when the piston 14 slides on the cylinder, the stem 11 b of the nozzle head and the chaplet 24 are separated. The gap between the insertion hole 24a and the air flow through the ventilation hole prevents a negative pressure in the container due to the outflow of the liquid from the container 18.

The push-type dispenser 10 has a well-known structure, and the entire structure itself is not the purpose of the present invention. Therefore, it will not be described in detail here.

In addition, as shown in FIG. 1, in such a push type dispenser 10, normally, a pair of external screws 36, female screws 38, and an outer periphery of the nozzle head system 11 a that can be screwed together. The surface and the inner peripheral surface of the insertion hole 24a of the chaplet are respectively provided.

According to such a configuration, as shown by the one-dot chain line in FIG. 2, the movement of the nozzle head 11 with respect to the cylinder 12, that is, the cylinder, is performed under the engagement between the male screw 36 and the female screw 38. Since the sliding of the piston 14 in the inside is regulated, it is possible to reliably prevent the liquid from leaking due to a malfunction of the piston during transportation, during display, or the like.

Here, as shown in FIG. 1, in the dispenser 10 of the present invention, the return spring 22 has a shape in which elastic pieces 22a each having a closed cross section and individually having a restoring force are continuously connected in plural stages. In addition, for example, it is molded from the same thermoplastic material as other constituent members.

As can be seen clearly from FIG. 3A, the elastic piece 22a is formed, for example, in a tubular shape having a hollow portion 42 having a substantially elliptical shape in which the vertical width W1 which is the expansion / contraction direction is narrower than the horizontal width W2. It is configured to be elastically deformable as shown in Fig. 3 (B) under compression in the direction of expansion and contraction.

As shown in FIG. 1, the return spring 22 is formed, for example, integrally with a flange 22b at the upper end and the lower end, respectively, and the engagement of each flange to the lower end of the piston 14 and the step portion 12b of the cylinder. Depending on the combination, the nozzle head 11 is stretched inside the cylinder 12 so that it can be pushed up.

As can be seen from FIGS. 3 (A) and 3 (B), in the return spring 22 including the elastic piece 22a having the hollow portion 42 having the substantially elliptical shape, the horizontal width W2 is the vertical width W1. Because of its wider width, lateral lateral ends are generally defined as folds. Then, since the elastic piece 22a is unified in the vertical direction with respect to the deformation direction, the elastic pieces can be uniformly elastically deformed, and the restoring force acts in the single direction, that is, the vertical direction. (See Figure 2).

Then, the combined restoring force of a large number of elastic pieces 22a acting in a single direction acts on the nozzle head 11 as the biasing force of the return spring 22, so that the nozzle head 11 is made of plastic even though it is made of plastic. A return spring having a biasing force necessary for pushing up and sucking up the liquid in the container can be sufficiently secured.

Here, as shown in FIGS. 3 (A), (B) and FIG. 4, in the present invention, for example, the notch 44 for making the wall thickness thinner than the other portion has the elastic piece 22a. It is provided along the lateral width at both lateral ends orthogonal to the expansion and contraction direction.

With such a configuration, the lateral ends of the thinned elastic piece 22a are more easily bent than the other portions, and the bending of the lateral ends is not disturbed by the thickness of the lateral ends. Since the elastic piece 22a is elastically deformed and restored, it is possible to easily secure the restoring force that effectively uses the narrow vertical width W1 of the hollow portion 42 of the elastic piece. Further, by providing the notch 44, the deformation position of the elastic piece 22a can be surely limited to both lateral ends, so that the deformation direction and the restoring direction can be further unified, and the biasing force of the return spring 22 can be increased. Can be fully covered.

As described above, according to the dispenser 10 of the present invention, the return spring 22 can be made sufficiently plastic. Further, since the elastic pieces 22a having a closed cross section each having a restoring force are continuously provided, the biasing force necessary for pushing up the nozzle head 11 and sucking up the liquid in the container 18 can be sufficiently secured to the return spring 22. Even if the return spring is made of plastic, the function of the dispenser 10 is not deteriorated.

That is, since all the constituent members of the dispenser 10 can be molded from plastic, the dispenser can be easily disposed of and the material can be reliably reused.

Further, the thickness of the lateral ends of the elastic piece 22a is reduced by the notch 44, and the elastic piece is deformed at the thin portion, whereby the durability of the deformed portion is surely improved. Therefore, even if the return spring 22 is left in a compressed state for a long time during transportation, during display, etc., the restoring force of the elastic piece 22a, that is, the biasing force of the return spring does not decrease. Therefore, also in this respect, the return spring 22 that does not deteriorate the function of the dispenser 10 can be sufficiently obtained.

By the way, in the embodiment, the elastic piece 22a of the return spring is exemplified as a tubular body having the substantially oval hollow portion 42. However, the elastic piece 22 a of the return spring is not limited to this, as long as it has a cylindrical closed cross-sectional shape having a hollow portion 42 having a vertical width W1 narrower than the horizontal width W2. For example, as shown in FIG. 6A to 6C, and the elastic pieces may be formed in the shapes shown in FIGS. 6A to 6C.

FIG. 5 (A) shows an example in which the hollow portion 42 and the elastic piece 22a have a substantially semi-circular appearance, and the elastic piece having such a shape is also provided with notches 44 at both lateral ends. This allows elastic deformation of the upper wall with respect to the flat lower wall.

Further, FIG. 5B illustrates a configuration in which notches 44 having a substantially arcuate cross section are provided at both lateral ends of the elastic piece 22a. Even in the notch 44 having such a shape, the thickness of the both lateral ends can be reduced, so that the elastic pieces can be easily unified in the direction of deformation and restoration.

In other words, the notch 44 is not limited in shape because it suffices that the thickness at both lateral ends of the elastic piece 22a be thinner than the other portions. Note that, here, the notch 44 is exemplified as a shape in which the wall thickness is partially dug, but it is not limited to the dug shape because it is sufficient if the thickness at both lateral ends is thin. The cutouts here also include those in which the thick-walled portions at both lateral sides are cut in the vertical direction.

Further, FIG. 5C shows an example in which the hollow portion 42 has a substantially rhombic shape. Even with such a shape, if the vertical width W1 of the hollow portion 42 is narrower than the horizontal width W2, the same effect as that of the elliptical hollow portion is obtained. Therefore, the hollow portion is not limited to the elliptical shape. It is easy to unify the deformation direction and the restoration direction of the elastic piece 22a.

Further, since the elastic piece 22a is sufficient if it is a tubular body having a closed cross section, the hollow eyeglass shape shown in FIG. 6 (A), the hollow hexagonal shape shown in FIG. 6 (B), and The appearance of the elastic piece may be formed in a hollow rhombic shape shown in FIG. 6 (C).

That is, if the elastic piece 22a of the return spring is a tubular body having the notches 44 at both lateral ends, its appearance, hollow portion, and notch shape can be variously formed.

Although the push-type dispenser is illustrated as the dispenser 10 in the embodiment, the present invention is not limited to this as long as the dispenser 10 has a structure having a return spring. The present invention may be applied to a trigger type dispenser that causes liquid to flow out from a nozzle by.

Usually, in a trigger type dispenser, the return spring is arranged in a substantially horizontal direction in accordance with the operation direction of the trigger, so that the expansion and contraction direction of the return spring is the horizontal direction, and the hollow width is narrower than the vertical width. The return spring is formed by juxtaposing the elastic pieces having the portions.

The above-described embodiments are for explaining the present invention, and do not limit the present invention in any way, and all the modifications and alterations made within the technical scope of the present invention are also applicable. It goes without saying that it is included in the invention.

[0049]

[Effect of device]

 As described above, according to the dispenser of the present invention, the return spring can be made sufficiently plastic. In other words, since all the constituent members of the dispenser can be molded from plastic, the dispenser can be easily disposed of and the material can be reliably reused.

Then, since the return spring is formed by connecting the elastic pieces of the closed cross section each having the restoring force individually, a plastic return spring having a strong biasing force can be obtained. Therefore, it is possible to sufficiently prevent the function of the dispenser from being deteriorated due to the plasticization of the return spring.

Further, by thinning the lateral ends of the elastic piece, the durability of the deformed portion is surely improved, so that the biasing force of the return spring can be prevented from being lowered during transportation, during exhibition, and the like. Therefore, also in this respect, a return spring that does not deteriorate the function of the dispenser can be sufficiently obtained.

If the hollow portion of the elastic piece is formed into a substantially elliptical shape, bending at both lateral ends can be easily ensured, so that the elastic piece can be easily deformed and the restoring direction can be limited.

Furthermore, if notches are provided at both lateral ends of the elastic piece, the both lateral ends can be easily thinned.

[Brief description of drawings]

FIG. 1 is a schematic vertical cross-sectional view of a dispenser (push type dispenser) according to an embodiment of the present invention at a protruding position of a nozzle head.

FIG. 2 is a schematic vertical cross-sectional view of a push-type dispenser during a nozzle pushing operation.

FIG. 3 is an enlarged partial front view of a return spring in an initial state and a deformed state.

FIG. 4 is a partial perspective view of a return spring.

FIG. 5 is a partial perspective view of a return spring showing a modified example.

FIG. 6 is a partial perspective view of a return spring showing another modified example.

FIG. 7 is an enlarged partial front view of a conventional return spring in an initial state and a deformed state.

[Explanation of symbols]

 10 Dispenser (push type dispenser) 11 Nozzle head 12 Cylinder 14 Piston 18 Container 22 Return spring 22a Elastic piece 26 Bottle cap 28 Primary valve 42 Hollow part 44 Notch

Claims (4)

[Scope of utility model registration request] 1. A nozzle head, which is attached to a mouth of a container containing a liquid under the attachment of a bottle cap and sucked up in advance in a cylinder, for pushing a nozzle head against a biasing force of a return spring. In a push type dispenser that pressurizes in the cylinder and flows out from the nozzle by interlocking, sliding of the piston with respect to the cylinder, the return spring has multiple elastic pieces of closed cross section with individual restoring force connected in series The elastic shape is molded from plastic with high elasticity, and each elastic piece is molded into a tubular shape with a hollow part whose vertical width that is the direction of expansion and contraction is narrower than horizontal width. A dispenser characterized in that the thickness of both lateral ends is thinner than the other parts of the elastic piece. 2. The liquid, which is attached to the mouth of the container containing the liquid under the attachment of the bottle cap and is sucked up in advance in the cylinder, is interlocked with the pulling of the trigger against the biasing force of the return spring. In a dispenser of the trigger type that pressurizes in the cylinder and flows out from the nozzle by sliding the piston with respect to the cylinder, the return spring has a plurality of elastic pieces with closed cross sections each having a restoring force and arranged in parallel. The elastic piece is molded into a tubular shape with a hollow part whose width is narrower than the vertical width, and the side that is orthogonal to the elastic direction of the elastic piece. A dispenser characterized in that the thickness at both ends is thinner than the other parts of the elastic piece. 3. The dispenser according to claim 1, wherein the hollow portion of the elastic piece is formed in a substantially elliptical shape. 4. The dispenser according to claim 1, wherein both lateral ends of the elastic piece are notched along the side width of the return spring.