JPH0323321Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a small manual dispenser. Normally, in a reciprocating pump type sprayer structure, the liquid is sprayed under pressure by a forward motion that pushes the spray head downward, and then the spray head is returned upward by a return spring to enter the pressurized chamber. It is used to suck liquid. However, with these devices, when the spray head returns, it is impossible to spray the liquid emulsion or the like by simply sucking it up from the container.

The present invention comprises: a mounting member having a peripheral wall to be mounted on the outer periphery of the mouth and neck of a container; and an engagement tube erected from the peripheral wall; a large-diameter cylinder, the lower half of which is substantially larger in diameter than the upper half of the peripheral wall; a suction valve installed in the bottom opening of the cylinder; and a container connected to the suction valve. a suction pipe that hangs down from the bottom of the main body; the suction pipe is fitted into the inside of the mounting member, is connected to the injection member main body having an injection mechanism at the upper part, and can be slid up and down by the operation of the injection member main body; a small-diameter cylinder; an upper part of which is disposed within the small-diameter cylinder with a gap therebetween; a piston member whose lower part is enlarged in diameter in the form of a skirt; a flexible valve provided at least diagonally downward and in sliding contact with the lower inner circumferential surface; a spring member provided between the piston member and the bottom of the large diameter cylinder and constantly biasing the piston member upward; and; an outer cylinder provided at the lower part of the small diameter cylinder, the lower end of which is in sliding contact with the mounting member so as to form a first pressurizing chamber between the cylinder and the upper half of the mounting member; It is fitted onto the outer periphery of the small diameter portion of the piston member, an upper end is in contact with the outer cylinder, a lower end is formed in the enlarged diameter portion of the piston member, and the second pressurizing chamber below the piston member and the first pressurizing chamber are connected to each other. A hole is formed so as to close a communication hole drilled in the radial direction so as to communicate with the pressure chamber, and to communicate the first pressurization chamber with a gap in the small diameter cylinder. a communicating cylindrical member; the lower part of the communicating cylindrical member is a flexible member that bulges outward when the second pressurizing chamber below the piston member reaches a predetermined pressure; When the piston member is pushed down, a third pressurizing chamber is formed between the outer circumferential surface of the piston member and the lower circumferential wall of the large-diameter cylinder. The present invention has the advantage that it can perform spraying even when the engine is in use, and that it can operate with high efficiency.

The configuration of the present invention will be explained below based on the embodiments shown in the drawings.

What is shown in FIG. 1 shows the first embodiment of the present invention, which is a trigger type dispenser.

As shown in the figure, a mounting member 4 to which a peripheral wall 3 is screwed is mounted on the outer periphery of the mouth and neck portion 2 of the container 1.
The mounting member 4 has an engagement tube 6 erected from the inner end of the inward flange 5 of the peripheral wall 3. An engagement protrusion 8 having an engagement portion 7 on its inner surface is provided at the tip of the engagement tube 6 . Further, a support member 10 to which the rotating end portion is pivotally attached is integrally provided.

Inside the peripheral wall 3, the flange 5 is provided at the upper end.
A peripheral wall portion 12 that has a flange 11 that comes into contact with the lower surface of the container 1 and that hangs down into the container 1 from the inner end of the flange 11
A large diameter cylinder 13 is provided. A container 1 is placed at the bend between the flange 11 and the peripheral wall 12.
A through hole 14 communicating with the inside is formed.

On the inner surface of the upper half of the peripheral wall portion 12 of the large diameter cylinder 13, there is provided a guide tube 16 having a notch 15 on the inner side of the lower end.
are fitted and fixed, and the upper half of the guide tube 16 is in close contact with the inner surface of the engagement tube 6 and abuts on the lower surface of the engagement projection 8. The guide tube 16 has slits formed at its upper end and side end that contact the engagement tube 6, so that a passage communicating with the through hole 14 is formed between the guide tube 16 and the engagement tube 6. 17 is formed.

By disposing the guide tube 16, the lower half of the large diameter cylinder 13 becomes substantially larger in diameter than the upper half. A spherical suction valve 18 is housed in the bottom opening of the large-diameter cylinder 13, and a suction pipe 19 that hangs down from the bottom of the container 1 is connected and fixed to the lower end.

The mounting member 4 has an opening 20 at its tip inside.
A main body 2 having a nozzle serving as a spraying part 21 is inserted through the main body 2.
A small diameter cylinder 23 connected to the cylinder 2 is vertically fitted in a slidable manner. This small diameter cylinder 23 can be pushed down by a known trigger type structure.

A piston member 25 is installed inside the small diameter cylinder 23 to form a liquid passage 24,
The lower half of the piston member 25 has a larger diameter than the upper half in a skirt shape, and the enlarged lower half is located on the inner peripheral surface of the lower part of the large diameter cylinder 13 with a gap S therebetween. There is.

On the outer periphery of the lower end of the piston member 25, a diagonally outwardly upwardly facing flexible valve 26 and a diagonally outwardly downwardly facing flexible valve 27 which are in sliding contact with the lower inner circumferential surface of the large diameter cylinder 13 are formed in a bifurcated shape.

The upward flexible valve 26 can be fitted into the notch 15 at the lower end of the guide tube 16 when the piston member 25 is in the upper position. A return spring 28 is disposed between the inside of the piston member 25 and the bottom of the large diameter cylinder 13, and the spring 28 always urges the piston member 25 upward.

The lower end of the small diameter cylinder 23 is fitted between the outer peripheral surface of the cylinder 23 and the inner surface of the guide tube 16, the upper end engages with the engaging portion 7 of the engaging protrusion 8, and the lower end An outer cylinder member 29 is attached which is in sliding contact with the inner peripheral surface of the guide cylinder 16. Furthermore, a communicating cylindrical member 30 is provided below the cylinder 23 and is externally fitted onto the piston member 25 through the outer cylindrical member 29 with a stepped portion. It is configured to be pushed down via the outer cylindrical member 29 and the communicating cylindrical member 30 depending on the use. Further, the communicating cylindrical member 30 has such flexibility that its lower end bulges outward under a predetermined pressure. With the above configuration, a pressurizing chamber A is formed between the communicating cylindrical member 30, the guide cylinder 16, the outer cylinder member 29, and the downwardly enlarged diameter portion of the piston member 25.

Further, as shown in FIG. 2, a plurality of notches 31 are formed in the upper end surface of the communicating cylindrical member 30, whereby the pressurizing chamber A and the liquid passage 24 in the small diameter cylinder communicate with each other. It's becoming like that.

A communication hole 32 bored in the radial direction is provided in the peripheral wall of the piston member 25 corresponding to the lower part of the communication cylindrical member 30. The pressure chamber B is communicated with when the lower part of the communicating cylindrical member 30 bulges outward at a predetermined pressure.

Next, the operation of the above structure will be explained.

Here, it is assumed that the pressurizing chamber B inside the large-diameter cylinder 13 is filled with the sucked liquid. In this state, when the injection member main body 22 is pushed down against the return spring 28, the piston member 25 is moved downward via the small-diameter cylinder 23, the outer cylinder member 29, and the communicating cylinder member 30. Since the internal volume of the pressure chamber B is narrowed, the liquid in the pressure chamber B is pressurized. When this fluid pressure reaches a predetermined value, the lower part of the communicating cylindrical member 30 is bent and swells outward, and pressurizing chamber B and pressurizing chamber A communicate with each other through the communicating hole 32, and pressurizing chamber B The pressurized liquid enters the pressurizing chamber A.

Here, the piston member 25 further descends, and the pressurized liquid passes through the notch of the communicating cylindrical member from the pressurizing chamber A, further passes through the liquid passage 24 in the small diameter cylinder, reaches the spray chamber 21, and is sprayed from the nozzle hole. be done.
At this time, the piston member is at the lowest position indicated by the broken line.

When the injection member main body 22 is stopped being pushed down after the liquid spraying is finished, the piston member 25 is released by the return spring 28.
When the liquid in the container 1 returns to the upper position, it is sucked up into the pressurizing chamber B through the suction pipe 19 and the suction valve 18, but at the same time, the outer surface of the lower end of the piston member 25 and the large diameter cylinder The residual liquid in the pressurized chamber C formed between the inside of the lower expanded diameter of 13,
Since the piston member 25 is pressurized by narrowing its area as it returns and rises, the pressurized liquid in the pressurizing chamber C passes through the gap S and the pressurizing chamber A and is sprayed outward in the same manner as described above. That is, liquid is sprayed both when the injection member main body moves forward and when it moves forward.

The trigger type dispenser of the present invention has the above-described structure and function, and when the piston member 25 is pushed down during liquid spraying, the piston member 25
A pressurizing chamber C is formed between the outer surface of the lower end of 5 and the inner surface of the lower enlarged diameter portion of the large diameter cylinder 13, so that when the piston member 25 returns and rises, the area of the pressurizing chamber C is narrowed. The remaining liquid in the pressurizing chamber C can be sprayed under pressure even when the piston member moves back. Furthermore, flexible valves 26 and 27 provided on the outer periphery of the lower end of the piston member 25 are intended to increase the sealing effect.

FIG. 3 shows another embodiment, which is a milky lotion dispenser.

In the structure of this embodiment, a discharge nozzle 40 is provided at the tip of the small diameter cylinder 23, and a spherical valve member 41 is provided inside the tip of the small diameter cylinder 23. Further, the cylinder 23 is configured to be locked to the mounting member 42 so that it does not come off above a predetermined position, that is, from the mounting member.
Other internal structures and operations are the same as in the previous embodiment.

[Brief explanation of the drawing]

Fig. 1 is a vertical sectional view of a manual small sprayer which is a trigger type dispenser according to an embodiment of the present invention;
The figure is an enlarged top perspective view of the communicating cylindrical member provided in the small sprayer, and FIG. 3 is a longitudinal cross-sectional view of another embodiment of the emulsion dispenser. 1: Container, 4: Mounting member, 13: Large diameter cylinder, 18: Suction valve, 19: Suction pipe, 23: Small diameter cylinder, 25: Piston member, 26, 27: Flexible valve, 28: Return spring, 29: Outer cylinder member, 3
0: Communicating cylindrical member, A, B, C: Pressurizing chamber.

Claims (1)

[Scope of utility model registration request] a mounting member having a peripheral wall to be mounted on the outer periphery of the mouth and neck of the container and an engagement cylinder erected from the peripheral wall;
a large diameter cylinder that is connected to the mounting member and has an upper half that hangs down into the mouth and neck, and the lower half of the peripheral wall has a diameter substantially larger than the upper half; a suction valve installed in the bottom opening; a suction pipe connected to the suction valve and suspended from the bottom of the container body; fitted and suspended inside the mounting member;
a small-diameter cylinder whose upper part is connected to an injection member main body having an injection mechanism and which can be slid up and down by the operation of the injection member main body; the upper part is installed inside the small-diameter cylinder with a gap and the lower part; a piston member whose diameter is expanded into a skirt shape; a lower flexible valve formed at the lower end of the piston member and provided at least diagonally downward and in sliding contact with the lower inner circumferential surface of the large diameter cylinder; a spring member disposed between the bottom of the small-diameter cylinder and biasing the piston member upward at all times; a spring member disposed at the bottom of the small-diameter cylinder and between the cylinder and the upper half of the mounting member; an outer cylinder whose lower end is in sliding contact with the mounting member side so as to form a first pressurizing chamber; an outer cylinder which is fitted around the outer periphery of the small diameter portion of the piston member, whose upper end is in contact with the outer cylinder, and whose lower end is in contact with the outer cylinder; is formed in the enlarged diameter portion of the piston member, and a second
The pressurizing chamber is arranged so as to close a communication hole bored in the radial direction so as to communicate with the first pressurizing chamber, and the first pressurizing chamber and the gap in the small diameter cylinder are connected to each other. a communicating cylindrical member formed with a hole that can communicate; the lower part of the communicating cylindrical member is configured to bulge outward when the second pressurizing chamber below the piston member reaches a predetermined pressure; It is a flexible member, and when the piston member is pushed down, a third pressurizing chamber is formed between the outer circumferential surface of the piston member and the lower circumferential wall of the large diameter cylinder. A small manual dispenser.