JP2555974Y2 - Fluid discharge device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a discharge device attached to a container for storing a fluid such as a liquid, and particularly to a reciprocating piston.
Flow in the container only when the piston moves forward
The present invention relates to a fluid discharge device for discharging a moving body, wherein the spring for reciprocating a piston does not contact the fluid.

[0002]

2. Description of the Related Art Conventionally, a fluid discharge device capable of discharging a fluid and attached to an opening of a storage container has a structure as shown in FIG. 3, for example.

In this fluid discharge device, a cylinder 55 whose upper end opening communicates with the outside air is fitted into a container cap 56,
A valve shaft 57 that moves up and down is provided in the cylinder 55, and a valve that opens and closes when the end of the valve shaft 57 contacts the valve seat 58. The lower end is the valve shaft 5
7, and a first piston 52 is provided integrally with a hollow piston guide 51 that moves up and down along the valve shaft 57.
At the same time, it is urged upward in a cylinder 55 by a spring 59 provided between the first piston and the valve shaft 57.

[0004] On the other hand, a second piston 53 is slidably inserted between the piston guide 51 and the inner peripheral surface of the cylinder 55 in a watertight manner therebetween. The seal portion 60 is formed in constant contact with the piston 52 to prevent the contents from leaking to the outside.

[0005] In conjunction with the operation of pushing down the spray head 54 fitted in the upper portion of the container cap 56, first, the piston guide 51 and the first piston 52 are lowered to close the valve, and the first piston 52 and the second piston 53 are separated. After the seal portion 60 is opened, the end of the stem 61 that pushes down the piston guide 51 is pressed to lower the second piston 53, so that the cylinder internal pressure increases. Then, the fluid in the cylinder passes through the seal portion 60 and the hole 63 provided in the piston guide 51, and is sent into the piston guide 51.
Nozzle 6 of spray head 54 through cylinder opening
4 and is discharged. In this discharge device, the cap 56 is screwed into the mouth of the container, and is detachably attached to the mouth of the container.

[0006]

However, the above-mentioned conventional fluid discharge device has the following problems. That is, a spring 59 for urging the first piston 52 and the piston guide 51 upward is provided in the cylinder 55.
Therefore, the spring 59 is located in the passage of the contents of the container to which the discharge device is attached, and is constantly in contact with the fluid to be discharged. There is a possibility that the contents of the container passing through the cylinder 55 may be soiled.

[0007]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a fluid discharging device having a structure attached to the outside of a cylinder which does not contact a fluid discharging a spring. I do.

The present invention has the following configuration to achieve the above object. In this apparatus, a cylinder 1 communicating with a spray head 10 is fitted into a cap 2 attached to an opening of a fluid container, and a valve shaft 3 which can be moved up and down is provided in the cylinder 1, and a valve seat 4 is provided. The valve shaft 3 is provided with a valve that opens and closes when the valve shaft 3 comes in contact with and separates from the valve shaft 3. Further, a hollow piston guide 5 that fits tightly to the valve shaft 3 and moves up and down along the valve shaft 3 is provided. A through-hole 6 is formed, and a first piston 7 is formed integrally with the piston guide 5. On the other hand, a second piston 8 which is interlocked with the first piston in a sealed state is connected to the piston guide 5 and the cylinder 1. In the fluid discharge device inserted in a watertight and slidable manner with the peripheral surface, the piston guide 5 is connected to the spray head 10 and a spring 13 for urging the spray head 10 upward is sprayed. Head 1
0 between the spray head 10 and the cap 2.
The upper end of the cap 2 and the upper end of the cap 2
The first piston (7) is provided between these fitting portions.
To improve the sealing performance with the second piston (8)
The urging force of the spring (13) is applied to the seal-shaped interlocking portion.
A valve stopper 14 is provided in the passage of the valve shaft 3 to abut the valve shaft 3 and regulate the operating range of the valve shaft 3.

[0009]

In this discharge device, the piston guide 5 is connected to the spray head 10, and a spring for urging the spray head 10 upward is inserted between the spray head 10 and the cap 2, so that the spring 13 is actuated during operation. There is no contact with the fluid to be discharged. Also, the lower end of the play head 10
A fitting portion is provided at the upper end of the cap 2 respectively.
Between the first piston (7) and the second piston
The spring to improve the sealing between the spring and the ton (8).
The biasing force of (13) is applied to the seal-shaped interlocking portion.
The first piston (7)
The sealing performance with the second piston (8) is improved,
-A spring is inserted between the head 10 and the cap 2
Also, there is no leakage of the fluid in the fluid storage container.

Further, since the valve stopper 14 which comes into contact with the valve shaft 3 and regulates the operating range is provided in the passage of the valve shaft 3, the ascending range of the valve shaft 3 is restricted, and the valve shaft 3 unnecessarily pops out of the cylinder 1. Nothing.

[0011]

Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a sectional view showing the internal structure of the fluid discharge device of the present invention. The cylinder 1 having a lower end connected to the suction pipe 16 is fitted into an upper opening of the cap 2 having a screw portion 19 screwed to an opening (not shown) of the fluid storage container formed on the inner surface. A cylindrical connecting portion 20 is provided continuously at the upper opening of the cap 2.

A hollow piston guide 5 is provided above the cylinder 1. The upper opening 15 of the piston guide 5 has a rod-shaped first stem 17 and a second stem 17 via connecting portions 18a and 18b. 11, the spray head 10 is connected to the inside upper portion of the cylindrical spray head 10, and a discharge port 23 is formed in the upper portion of the spray head 10 to form the nozzle 2.
The tip of 4 faces outside. The discharge port 23 can be opened and closed by a nozzle stopper 25.

Further, a coil spring 13 for urging the spray head 10 upward is provided with the spray head 10 and the cap 2.
Is inserted between. The upper end of the coil spring 13
The lower end abuts against the upper surface of the concave portion 26 inside the spray head 10, and the lower end thereof abuts a step 29 inside the cylindrical receiving portion 28 provided in the cap 2 and engaged with the upper end 27 of the cylinder 1. I have.

The lower end of the spray head 10 and the upper end of the spring receiving portion 28 form an undercut fitting portion 30 having a ridge, and hold the spray head 10 so as not to come off the cap 2. ing. The undercut fitting portion 30 can be provided between the lower end of the spray head 10 and the upper end of the tubular connecting portion 20.
According to the present embodiment, a large step does not occur on the outer peripheral surfaces of the spray head 10 and the cylindrical connecting portion 20, so that the degree of freedom of design in appearance is increased.

On the other hand, a valve shaft 3 which can move up and down and has a large diameter at the bottom is inserted into the cylinder 1.
The valve seat 4 is provided by tapering the inner peripheral surface below the valve shaft 3 to form the valve 31. This valve 31
The valve shaft 3 opens and closes with the lower end of the valve shaft 3 approaching and separating. A convex portion 32 is formed on a lower side surface of the valve shaft 3, while a valve stopper 14 fixed to the inner peripheral surface of the cylinder 1 is provided at a slight interval above the convex portion 32. When the valve shaft 3 rises, the projection 32 comes into contact with the lower end of the valve stopper 14, so that the operating range of the valve shaft 3 is restricted.

The lower end of the piston guide 5 located above the cylinder 1 is fitted to the upper end of the valve shaft 3 in a watertight manner. The piston guide 5 is vertically movable along the valve shaft 3, and a through hole 6 is formed near the lower end of the piston guide 5.

A first piston 7 is formed integrally with the lower end of the piston guide 5 so as to be continuous therewith. The first piston 7 is held at a position above the cylinder 1 together with the piston guide 5.

On the other hand, a second piston 8 formed in a ring shape is inserted between the piston guide 5 and the inner peripheral surface of the cylinder 1 in a watertight and slidable manner.
At the upper stop position where the engaging end 33 of the receiving portion 28 engaged with the upper end of the cylinder 1 comes into contact with the stepped portion 22 formed to protrude, the through hole 6 for maintaining airtightness in the cylinder 1 is provided. And contact with the first piston 7
Then, it is interlocked with the first piston 7. The contact portion between the first piston 7 and the second piston 8 forms a seal portion ( seal-like interlocking portion ) 9 for sealing the inside of the cylinder 1.

Further, an end 11a of the second stem 11 is located above the second piston 8 with a gap 12 therebetween. Next, the operation of the discharge device will be described.

First, when the spray head 10 is depressed,
The piston guide 5 descends in the cylinder 1, the first piston 7 also descends, and the seal 9 opens. When the descent continues further, the valve 31 is closed this time and the tip 11 of the second stem 11 is closed.
Since a contacts the second piston 8 and pushes it down,
The internal pressure of the cylinder 1 increases. Therefore, the fluid in the cylinder 1 passes through the piston guide 5 through the through hole 6, reaches the spray head 10, and is discharged from the tip of the nozzle 24.

When the spray head 10 is released, the spray head 10 returns to the original position by the urging force of the coil spring 13, and the first piston 7 and the second piston 8 also return to the positions before the operation to close the through hole 6. As a result, the valve 31 opens, and the internal pressure of the cylinder 1 decreases. Then, the contents in the container (not shown) are sucked up into the cylinder 1 via the suction pipe 16, and the same operation as described above can be repeated if the spray head 10 is pushed down again.

In this embodiment, as shown in FIG. 2, in order to sufficiently apply the urging force of the coil spring 13 to the seal portion 9, the undercut fitting portion 30 at the upper end of the spring receiving portion 28 and the lower end of the spray head 10 is provided. , A clearance 21 is provided. Further, the engagement end 3 between the second stem 11 and the receiving portion 28
3 is provided with a retaining portion 35 having a stepped portion that is in contact with each other, and a clearance 34 is similarly generated in this portion. Therefore, the first piston (7) and the second piston (7)
The sealing performance with the piston (8) is improved,
Even if a spring is inserted between the pad 10 and the cap 2,
There is no leakage of fluid in the moving object storage container.

Further, even if the connecting portions 18a and 18b come off, the undercut fitting portion 30 or the front retaining portion 35 prevents the spray head 10 from coming off. In this case, since the sealing of the seal portion 9 is released, the nozzle stopper 25 may be closed so that the fluid as the content does not leak from the nozzle 24.

[0024]

As described above, in the present invention, the piston guide 5 is connected to the spray head 10, and the spring 13 for urging the spray head 10 upward is inserted between the spray head 10 and the cap 2. Since the spring does not come into contact with the fluid as the contents of the container, corrosion due to the rust of the spring and contamination of the discharged fluid can be prevented. The lower end of the play head 10 and the cap 2
The upper end of each has a fitting part, between these fitting parts
Is a seal between the first piston 7 and the second piston 8.
The biasing force of the spring 13 is applied to the sealing
Since the clearance for acting on the part 9 is provided,
The sealing performance between the first piston 7 and the second piston 8 is improved.
And insert a spring between the spray head 10 and the cap 2.
Fluid leakage inside the fluid storage container
No.

The valve shaft 3 is brought into contact with the valve shaft 3
Is provided, the valve shaft 3 unnecessarily jumps out of the cylinder 1,
There is no hindrance to the operation of the valve 31.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional view showing an internal structure of a fluid discharge device of the present invention.

FIG. 2 is an enlarged sectional view of a piston portion.

FIG. 3 is a partial sectional view showing the internal structure of a conventional fluid discharge device.

[Explanation of symbols]

1. Cylinder 2. Cap 3. Valve shaft 5. Piston guide 7. First piston 8. Second piston 9. Sealed interlocking part 10. Spray head 13. Coil spring 14. Valve stopper

 ──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Takao Kishi 3-2-6 Oshima, Koto-ku, Tokyo Inside Yoshino Kogyo Co., Ltd. (56) References JP-A-1-199862 (JP, A) JP-A-Hei 3-148484 (JP, A) Hikaru 3-66863 (JP, U)

Claims (1)

(57) [Scope of request for utility model registration] 1. A cylinder (1) communicating with a spray head (10) is fitted into a cap (2) attached to an opening of a fluid container, and a vertically movable valve is provided in the cylinder (1). A shaft (3) is provided, and a valve is formed on the valve seat (4) so that the valve shaft (3) can be opened and closed by being brought into and out of contact with the valve shaft (3). A hollow piston guide (5) that moves up and down along the piston guide (5) is provided, a through hole (6) is formed in the piston guide (5), and a first piston (7) is integrally formed with the piston guide (5). Formed and, on the other hand, a seal on the first piston (7)
A fluid-discharging device in which a second piston (8) interlocked in a state is inserted between the piston guide (5) and the inner peripheral surface of the cylinder (1) in a watertight and slidable manner. Is connected to the spray head (10), and a spring (13) for urging the spray head (10) upward is inserted between the spray head (10) and the cap (2), and the lower end of the spray head 10 and the
A fitting part (30) is provided at the upper end of the cap 2 respectively.
The first piston is provided between these fitting portions (30).
(7) Enhancing the seal between the second piston (8)
The biasing force of the spring (13) is
Provision of clearance (21) to act on (9)
And a valve stopper (14) which comes into contact with the valve shaft (3) and regulates the operating range of the valve shaft (3).
Fluid discharge device, characterized in that the provided passage of the valve shaft (3).