JP2003071336A - Check valve - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a check valve surely performing an opening operation and a clogging operation. SOLUTION: This check valve 5 for flowing fluid to only one direction in pipeline is constituted of a circular base 5a having an opening h through which the fluid is made to pass in the pipeline and a soft material 5b which is superimposed on the base 5a so that the opening h is always kept in clogged state or deformed elastically by the sucking action of the fluid so that the opening h is opened.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a check valve and is intended to surely exert the function of the check valve.
Hereinafter, a spray nozzle attached to the mouth of the container will be described as an example.

[0002]

2. Description of the Related Art In a container for filling cosmetics and the like, a spray nozzle having a structure shown in FIG. 10 is used as a spray nozzle for uniformly spraying the cosmetic.

Such a spray nozzle has a nozzle head 1
By pressing 0, the contents in the cylinder 11 are pressurized and sprayed from the tip of the nozzle 12, while the contents in the container are sucked into the cylinder 11 through the suction pipe 13 as the nozzle head 10 returns to the initial position. Therefore, the flow of the contents to the container side after suction is prevented by the ball type check valve 14 arranged on the inlet side of the cylinder.

By the way, in recent years, a liquid containing a solid content such as powder has been used as a content, and when such a content is sprayed by a conventional spray nozzle, FIG. As shown in the figure, solid contents such as powder are accumulated on the inlet wall surface of the cylinder 4, and the check valve 1
In some cases, the ball of No. 4 may be placed on top of it, and in this case, the contents sucked into the cylinder 4 may flow out to the container side, and the contents may not be sprayed. It

[0005]

SUMMARY OF THE INVENTION An object of the present invention is to propose a new check valve which can surely perform opening / closing operation.

[0006]

SUMMARY OF THE INVENTION The present invention is a check valve for allowing a fluid to flow in only one direction in a pipe line, the check valve having an opening for allowing passage of the fluid in the pipe line. A non-return valve comprising a base and a soft material fitted to the annular base so as to always keep the opening in a closed state and open the opening by elastic deformation accompanying a suction operation of fluid.

The annular base has a fitting portion for fitting and holding the base in the pipeline, or fitting with a soft material in the pipeline for fixing and holding the base. Those having parts can be applied. Further, the soft material is advantageously made of a rubber elastic body or an elastomer body.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described more specifically with reference to the drawings. FIG. 1 shows an example in which a check valve according to the present invention is applied to a spray nozzle.

In the figure, reference numeral 1 is a base member shown as an example of screwing at the base of a container, and 2 is a cylinder fixedly held by the base member 1. A suction port 2a for sucking the contents through the suction pipe s is formed in the bottom wall portion of the cylinder 2.

Reference numeral 3 is a piston arranged in the cylinder 2. The piston 3 has a passage 3a penetrating in a direction along its axis.

Reference numeral 4 is a piston guide. The piston guide 4 is disposed in the passage 3a of the piston 3 and guides the opening / closing operation of the passage 3a. The piston guide 4 cooperates with the cylinder 2 and the piston 3 to draw a space area (cylinder chamber) for suction and pressurization of fluid. ) Form M.

A check valve 5 opens the suction port 2a of the cylinder 2 only when the contents are sucked. The check valve 5 is fitted with an annular base 5a having an opening h through which the fluid passes, and maintains the opening h in a closed state at all times by the annular base 5a.
Is made of a soft material 5b that holds the valve in an open state, and a fitting portion 5c that is integrated with the annular base 5a is fitted in the cylinder 2 to fix and hold the check valve 5 itself.

Further, 6 is a hollow stem, and the hollow stem 6 slidably covers the outside of the piston 3 while maintaining a liquid-tight state and engages with the end of the piston guide 4.

No. 7 is a nozzle head that fits the tip of the hollow stem 6. The nozzle head 7 includes a spray nozzle 7a that sprays the fluid flowing out through the internal space 6a of the hollow stem 6 to the outside.

Further, numeral 8 is a first elastic member and numeral 9 is a second elastic member.
Is an elastic member. The first elastic member 8 engages one end of the first elastic member 8 with the receiving portion 5d of the check valve 5 in the space region M of the cylinder 2 to press the piston guide 4 against the piston 3 to close the passage 3a of the piston 3. It has the function of maintaining. Further, the second elastic member 9 is illustrated as being arranged between the piston 3 and the hollow stem 6, and the piston 3 is pressed against the piston guide 4 and the ejection pressure (internal pressure) of the fluid is adjusted. Have a function.

When the nozzle head 7 is pressed and the hollow stem 6 and the piston 3 connected thereto are pushed down in the state where the fluid is present in the space region M, the suction port 2a is opened by the check valve 5.
Since it is blocked at, the pressure in the space region M rises.

Then, as shown in FIGS. 2 and 3, the passage 3a is opened until the inner end 6b of the hollow stem 6 abuts on the end face 3b of the piston 3, and the fluid is discharged from the hollow stem 6 under the pressure at that time. It will be sprayed from the spray nozzle 7a of the nozzle head 7 to the outside through the internal space 6a.

When the nozzle head 7 is pushed down and the load applied to it is removed, the restoring force of the first elastic member 8 causes the hollow stem 6 to return to the initial posture together with the piston 3 as shown in FIGS. At this time, the space area M is decompressed.

When the space area M is decompressed, the main part of the check valve 5 is enlarged and the soft material 5b of the check valve 5 is expanded as shown in FIG.
Elastically deforms away from the annular base 5a, and the fluid flows into the space region M through the suction pipe s, the suction port 2a, and the opening h.

In this state, the fluid can be sprayed again by applying a load to the nozzle head 7.

The check valve 5 according to the present invention opens the opening h by elastically modifying the soft material 5b which is in close contact with the annular base 5a, unlike the conventional one using a ball. Even if the fluid contains a solid content such as powder, the opening / closing operation of the fluid is not adversely affected, and stable spraying can be performed for a long period of time.

FIG. 7 shows another structural example of the check valve according to the present invention. In this example, a receiving portion 5d for receiving the first elastic member 8 is provided at the tip end portion of the annular base 5a to enlarge the deformation area of the soft material 5b. The soft material 5b can be reliably elastically deformed in the range of the gap formed between them.

FIG. 8 shows still another configuration example of the check valve according to the present invention. In this example, similarly to FIG. 7 above, a receiving portion 5d for receiving the first elastic member 8 is provided at the tip portion of the annular base 5a, and the annular base 5a is made of the soft material 5.
b has a structure in which it is fitted and fixedly held on the inner wall surface of the cylinder 2 together with b, whereby not only the deformation region of the soft material 5b is enlarged but also the positioning of the soft material 5b in the conduit is performed. Will be certain.

9 (a) and 9 (b) show the external appearance of the check valve 5 shown in FIGS. 7 and 8 above.

A rubber elastic body or an elastomer body can be applied to the soft material 5b, but other materials can be used as long as they can surely close and open the opening h.

[0026]

According to the present invention, the opening / closing operation of the check valve can be reliably maintained for a long period of time even if the content contains solids, and as a result, a stable supply of the content can be achieved. Become.

[Brief description of drawings]

FIG. 1 is a structural explanatory view of a spray nozzle equipped with a check valve according to the present invention.

FIG. 2 is an explanatory diagram of an operating procedure of the spray nozzle shown in FIG.

3 is an explanatory diagram of an operating procedure of the spray nozzle shown in FIG. 1. FIG.

FIG. 4 is an explanatory diagram of an operating procedure of the spray nozzle shown in FIG.

5 is an explanatory diagram of an operating procedure of the spray nozzle shown in FIG. 1. FIG.

FIG. 6 is an enlarged view showing a main part of the spray nozzle shown in FIG.

FIG. 7 is a diagram showing another configuration example of the check valve according to the present invention.

FIG. 8 is a diagram showing another configuration example of the check valve according to the present invention.

9A is an external perspective view of FIG. 7, and FIG. 9B is an external perspective view of FIG.

FIG. 10 is a diagram showing a configuration of a spray nozzle having a conventional structure.

11 is a diagram showing a main part of FIG.

[Explanation of symbols]

1 Base member 2 cylinders 2a Suction port 3 pistons 3a passage 3b end face 4 Piston guide 5 Check valve 5a annular base 5b Soft material 5c mating part 5d receiver 6 hollow stem 6a Internal space 7 nozzle head 7a Spray nozzle 8 First elastic member 9 Second elastic member 10 nozzle head 11 cylinders 12 nozzles 13 Inhalation tube 14 Check valve s Inhalation tube M space domain h opening

Continued front page    F term (reference) 3E014 PA01 PA02 PB01 PD11 PE09                       PF10                 3H058 AA15 BB03 BB28 CA03 CA23                       CA31 CA39 CC05 CC06 CD05                       DD12 DD17 EE05 EE07 EE19

Claims (4)

[Claims] 1. A check valve for allowing a fluid to flow in only one direction in a pipeline, wherein the check valve includes an annular base having an opening for allowing the fluid to pass in the pipeline, and the check valve is fitted to the annular base. A check valve, which is made of a soft material that maintains the opening in a normally closed state and opens the opening by elastic deformation caused by a suction operation of a fluid. 2. The check valve according to claim 1, wherein the annular base has a fitting portion that fits in the conduit to fix and hold the base. 3. The check valve according to claim 1, wherein the annular base has a fitting portion that fits together with the soft material in the pipe line to fix and hold the base. 4. The check valve according to claim 1, wherein the soft material is a rubber elastic body or an elastomer body.