JP3062722B2 - Dispenser - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dispenser which is used by being attached to a container opening for extracting liquid in a container to the outside. Inhaled and released to the outside,
The present invention relates to a manual dispenser having a so-called pump function.

[0002]

2. Description of the Related Art In containers for shampoos, cosmetics and the like, a manual dispenser is often attached to the mouth in order to extract a predetermined amount of an internal liquid to the outside. As a conventional dispenser, for example, Japanese Unexamined Patent Publication No.
A structure as disclosed in Japanese Patent Application Publication No. 184977 is known. FIG. 5 and FIG.
1 shows a dispenser disclosed in Japanese Patent Application Laid-Open No. 977, which extracts a liquid in a container to the outside by the following mechanism. That is, when the user uses the head 3
When the piston 32 is depressed through 1, the volume of the transformation chamber 33 is reduced, and the coil spring 34 provided inside is compressed. Next, when the user releases the head unit 31, the compressed coil spring 34 is Restore and Piston 3
2 rises, and accordingly, the pressure in the transformation chamber 33 decreases, and the liquid in the container 35 enters the transformation chamber 33 from the inlet 36. Thereafter, when the user pushes down the piston 32 again via the head portion 31, the liquid that has entered the variable pressure chamber 33 is discharged from the ejection nozzle 37 to the outside. And
The conventional dispenser is housed so that the head portion is held down in a depressed state so that the liquid in the container is not accidentally released when not in use. FIG.
184977 discloses a storage state of the dispenser when not in use, and the dispenser includes:
After the head portion 31 is pressed down, the locking protrusion 38 is locked to the locking portion 39 against the restoring force of the coil spring 34, so that the head portion 31 is held in a pressed state. In the conventional dispenser, most parts are formed of synthetic resin because they are inexpensive and can be easily manufactured, but the coil spring is formed of metal because a high restoring force is required.

[0003]

However, since the conventional dispenser uses a metal coil spring, the coil spring is separated from other parts when it is discarded as garbage after use or when it is desired to recycle. Must be very annoying. In addition, since the liquid in the container constantly comes into contact with the metal coil spring, for example, when the liquid in the container is a strongly acidic chemical or the like, the coil spring may rust and impurities may be mixed into the liquid. In addition, there is a possibility that the restoring force of the coil spring is reduced due to rust, and the coil spring does not work properly. On the other hand, in order to solve this problem, it is conceivable that the coil spring is made of a synthetic resin, but in the conventional dispenser, the coil spring is held in a compressed shape in a storage state when not in use. A resin coil spring deforms to a compressed state due to the stress relaxation behavior of the resin, and does not return to the original state even when the stored state is released, and does not perform a normal pump function. For this reason, a dispenser using a coil spring made of a synthetic resin has not been put to practical use, and the dispenser that is entirely formed of a synthetic resin and does not need to be discarded separately, and that can function normally as a pump, It did not exist before.

[0004] An object of the present invention is to solve the above-mentioned problems, to allow the pump function to be normally exhibited for a long period of time, and to separate the waste when discarded after use or when it is desired to recycle. It is an object of the present invention to provide a dispenser that does not need to be mixed with impurities in a liquid in a container to be attached.

[0005]

According to the structure of the present invention, there is provided a liquid inlet having a check valve at a lower end thereof, a cylinder which is attached from the mouth of the container in a drooping manner, and a packing.
With a piston that is freely inserted into the cylinder so that it can freely move up and down, a head with an ejection nozzle that is provided integrally with the piston, and a check valve that penetrates the head and the piston and connects the inside of the cylinder with the ejection nozzle A dispenser having a liquid flow path and extracting a liquid contained in an attached container to the outside, wherein a coil spring made of a synthetic resin having a lower end fixed thereto is coaxially arranged between the cylinder and the piston. At the same time, a locking wing is projected from the piston in a radial direction so that the locking wing can be inserted into a gap between spirals in the coil spring, and the rotation of the piston causes the locking wing to move between the spirals. It is guided by the gap to be able to move up and down.

[0006] The dispenser of the present invention is formed by a usual molding method such as injection molding using a usual synthetic resin. Since the dispenser is used by being attached to a container containing a liquid containing a chemical or the like, the dispenser is preferably formed of a synthetic resin having chemical resistance such as polyacetal resin, polyphenylene sulfide resin, polybutylene terephthalate resin, or the like. Further, the entire dispenser may be formed of the same resin, or the type of the synthetic resin may be changed according to the purpose and function of the components constituting the dispenser. Further, various synthetic resins can be used as the synthetic resin forming the coil spring,
It is preferable to use a synthetic resin having both strength and elasticity, such as polyacetal resin, polyphenylene sulfide resin, polybutylene terephthalate resin, polyamide resin, and polypropylene resin.

[0007]

The dispenser rotates the head so that the locking wing slides along the spiral of the coil spring,
Since the piston can be lowered without compressing the coil spring, when not in use,
The head is held and housed at a position where the head is pushed down in a state where the coil spring is not compressed at all. Therefore,
Since the coil spring made of synthetic resin maintains a high restoring force without being deformed by stress relaxation, the dispenser exhibits a high pumping function over a long period of time. Also, in the dispenser, since the coil spring is formed of a synthetic resin having excellent chemical resistance, even if the liquid in the container to be attached has a strong acidity, the coil spring does not rust. No impurities are mixed in, and the pump function does not deteriorate due to a decrease in the restoring force due to the rust of the coil spring. In addition, since the dispenser is entirely formed of synthetic resin, it is not necessary to separate the coil spring from other components when discarding it as garbage after use or when recycling it.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the dispenser of the present invention will be described below in detail with reference to the drawings. FIG. 1 is an explanatory view showing a cross section of the dispenser. The dispenser 1 includes a cylinder 2, a piston 3 that moves up and down in the cylinder 2, and the like.
A cap 4 is attached to the mouth 6 of the container 5 containing the liquid. The cylinder 2 is formed in a hollow cylindrical shape, and the lower portion is continuously formed to have a narrow width, and an introduction pipe 7 extends at the lowermost portion. A locking wall 8 is provided upright on the inner wall of the cylinder 2, and a central portion thereof allows liquid in the container to flow above the locking wall 8 without resistance so that the piston 3 can be inserted therethrough. Thus, the insertion portion 9 is formed by being formed in a circular shape having a diameter larger than the diameter of the piston 3. A cylindrical introduction member 10 is fitted below the cylinder 2, and a peripheral projection 12 is provided in an introduction path 11 of the introduction member 10. A ball valve 13 which is a check valve using gravity is loosely fitted in a space formed by the circumferential projection 12 in the introduction path 11 and the inner wall of the cylinder 2.

On the other hand, the piston 3 is also formed in a hollow cylindrical shape, and a head portion 14 is fixed to an upper end thereof. Then, a liquid flow path (not shown) inside the piston 3
Communicates with the tip of the ejection nozzle 15 attached to the head portion 14. A disk-shaped packing 16 having a diameter substantially the same as the diameter of the cylinder 2 is provided substantially at the center of the piston 3 so as to be perpendicular to the axial direction of the piston 3.
Slightly below the packing 16 is a semi-cylindrical locking wing 1.
7 is erected (in the radial direction) so as to oppose the piston 3 in the diameter direction. Further, a joint 18 having a diameter smaller than the diameter of the piston 3 is provided at the tip of the piston 3. A check valve (not shown) having a function of blocking outside air from the ejection nozzle 15 and allowing only the liquid in the container sucked from the joint 18 to pass through the liquid flow path inside the piston 3. ) Is built-in.

[0010] A flat coil spring 19 having a spiral shape is provided between the locking wing 17 of the piston 3 and the locking wall 8 of the cylinder 2. The distal end of the coil spring 19 is formed to be thick and has a return 20 so that the coil spring 19 does not come off when fitted to a fitting portion 21 provided on the locking wall 8.

The dispenser 1 configured as described above
In the first embodiment, all parts such as the cylinder 2, the piston 3, the head 14, the ejection nozzle 15, the coil spring 19, the ball valve 13, and the introduction member 10 are formed of polyacetal resin. Since the coil spring 19 is formed in a spiral flat plate shape, it has a high restoring force despite being made of synthetic resin.

When the dispenser 1 is used, that is, when the liquid in the container is extracted to the outside, the head 14 is first depressed (see FIG. 2). Next, the head unit 14
Is released, the piston 3 pushed down together with the head portion 14 rises to a position before being pushed down by the restoring force of the coil spring 19. As the piston 3 rises, the pressure in a space (hereinafter, referred to as a variable pressure chamber) 22 partitioned by the wall surface of the cylinder 2, the packing 16 and the ball valve 13 decreases due to an increase in volume. Is separated from the valve seat 23, and the liquid in the container 5 is sucked into the variable pressure chamber 22 from the inlet 24 at the tip of the cylinder 2. Then, when the head portion 14 is pushed down again and the piston 3 which has returned to the original position is lowered, the pressure in the variable pressure chamber 22 increases, so that the liquid filled therein passes through the joint at the tip of the piston 3. , And is discharged outside through a check valve inside the piston 3. As described above, the dispenser 1 can intermittently extract the liquid in the container 5 to the outside by pushing down the head part 14 intermittently and repeatedly moving the piston 3 up and down.

When the dispenser 1 is not used, the head portion 14 is rotated in a fixed direction over several turns, and the locking wings 17 attached to the piston 3 are rotated by the coil spring 1.
The head unit 14 is lowered by sliding along the spiral of No. 9. FIG. 3 shows this state. By rotating the head portion 14, the locking wing 17 is turned into a notch 26 provided at the upper end of the coil spring 19.
Into the gap between the spirals of the coil spring 19, and is guided gradually downward while sliding along the gap between the spirals, and is locked by the locking portion 25 bent at the lowermost position of the coil spring 19. Is done. By locking the locking wings 17 at the lowermost position of the coil spring 19 in this manner, the head portion 14 is held in a depressed state (see FIG. 4). When the dispenser 1 is not used, the dispenser 1 is left in such a stored state, but in this state, the coil spring 19 is not compressed at all. In this way, it is kept uncompressed when not in use,
The coil spring 19 can exhibit a high restoring force over a long period of time despite being made of resin. On the other hand, since the head portion 14 is held in a depressed state, the head portion 14 is not erroneously depressed, and the liquid in the container 5 is not released to the outside when unnecessary. In the dispenser according to the present invention, in order to prevent the head unit 14 from being inadvertently rotated during use and the storage state or the piston movable range being narrowed,
A projection is provided on a part of the coil spring 19, particularly on an upper part thereof,
Thus, it is effective to adopt a structure for preventing careless rotation of the locking wing 17 (see FIG. 3C).

[0014] The dispenser of the present invention is not limited to the above-described shape and structure, and the locking wing slides along the spiral of the coil spring to compress the coil spring by rotating the head portion. Any shape can be used as long as a mechanism capable of lowering the piston is incorporated.

[0015]

According to the dispenser of the present invention, when the dispenser is not used, the coil spring made of synthetic resin is held in a state where the head portion is pushed down without being compressed, and the coil spring is deformed by stress relaxation. Therefore, a high pump function can be exhibited over a long period of time. Also, in the dispenser, since the coil spring is formed of a synthetic resin having excellent chemical resistance, even if the liquid in the container to be attached has a strong acidity, the coil spring does not rust. There is no concern that impurities will be mixed in and the pump function will not be impaired due to a reduction in the restoring force due to the rust of the coil spring. Furthermore, since the dispenser of the present invention is entirely formed of a synthetic resin, there is no need to separate at all when disposing it as garbage after use or when it is desired to recycle it.

[Brief description of the drawings]

FIG. 1 is a partially sectional explanatory view showing a dispenser in a state where a head unit is pushed up.

FIG. 2 is a partial cross-sectional explanatory view showing a dispenser in a state where a head unit is pushed down.

FIG. 3 is an explanatory diagram showing a state in which a locking wing slides along a gap between spirals of a coil spring.

FIG. 4 is a partial cross-sectional explanatory view showing a stored state when the dispenser is not used.

FIG. 5 is a partially sectional explanatory view showing a conventional dispenser in a state where a head portion is pushed up.

FIG. 6 is a partial cross-sectional explanatory view showing a stored state when a conventional dispenser is not used.

[Explanation of symbols]

1. dispenser, 2. cylinder, 3. piston, 4. cap, 5. container, 6. mouth, 7.
Introductory tube, 8 locking wall, 9 insertion section, 10 introduction member, 11 introduction path, 12 circumferential protrusion, 13 ball valve, 14 head section, 15 Spout nozzle, 16 ...
Packing, 17 ... locking wing, 18 ... joint, 19 ...
Coil spring, 20 return, 21 fitting part, 22
Transformation chamber, 23 .. Valve seat, 24 .. Inlet, 25 .. Locking part, 26, Notch, 31 .. Head part, 32 .. Piston, 33 .. Transformation chamber, 34 .. Coil spring, 35 ..・
Vessel, 36 ... Inlet, 37 ... Squirt nozzle, 38 ...
Locking projections, 39... Locking portions, 40.

Claims (1)

(57) [Claims] 1. A cylinder having a liquid inlet with a check valve at a lower end thereof, which is attached in a manner hanging down from the mouth of a container, and a piston around which packing is provided and which is freely inserted into the cylinder so as to be vertically movable. A container having a head with an ejection nozzle integrally provided on the upper part of the piston, and a liquid flow path with a check valve penetrating the head and the piston and communicating the inside of the cylinder with the ejection nozzle. A dispenser for extracting liquid contained therein to the outside, wherein a synthetic resin coil spring having a lower end fixed thereto is coaxially disposed between the cylinder and the piston, and a locking wing is radially provided on the piston. And the locking wings can be inserted into the gaps between the spirals in the coil spring, and the locking wings are guided into the gaps between the spirals by the rotation of the piston. A dispenser characterized in that it can be moved up and down.