JP2002274581A - Injection button having tip-stop function - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an injection button having tip-stop function which can increase the amount of injection by utilizing a needle valve capable of achieving a tip-stop function. SOLUTION: A nozzle 10 which is fitted to a stem 3 of an aerosol container 1 and has a needle valve 20 having orifices 22, 23 closed by a ring-shaped seal member 25 and placed on two stages in different positions of front and rear formed around its front end and a cap 30 which has a front part 31 extending over the front and the upside of the nozzle and an upside part 32 and serves as an operating member are provided. A part positioned lower than the needle valve 20 of the cap is sustained by the nozzle 10 so that the front part 31 can be swung rearward in a way of elastically returnable on pushing-down of the upside part 32, and injection toward the front is made through the orifices 22, 23 which are opened with the seal member 25 bent by tilting toward the rear of the front part 31 when the stem 3 is opened by pushing-down of the cap 30. The orifice 23 at the rear position is opened when the front part 31 is tilted rearward in a larger extent.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a nozzle having a needle valve which is fitted to a stem at a base end thereof and has an orifice formed by a ring-shaped seal member and formed around a distal end thereof, and a front surface and a top surface thereof. And an operating member for moving the nozzle downward, and a lower portion of the operating member below the needle valve is swung rearward so that the front surface can be elastically restored by an operation of pressing down the upper surface of the operating member. A spray button with a tip stop function for aerosol containers that is supported by the nozzle so that it moves, and the orifice is opened by depressing the front side of the seal member during the downward operation to open the orifice and release the downward operation. It is about.

[0002]

2. Description of the Related Art This type of injection button with a chip stop function is known from Japanese Utility Model Laid-Open Publication No. 64-8959.
A nozzle valve having an orifice closed by a ring-shaped seal member near the distal end is provided forward, and a nozzle fitted to the stem of the aerosol container at the proximal end, and the nozzle swings with elasticity. An inverted L-shaped plate-shaped operating member whose lower end is supported as possible, the orifice is also opened and closed by the bending of the seal member interlocking with the pressing operation of the operating member for lowering the stem via the nozzle, and the injection port is opened. Is prevented from dripping.

[0003]

SUMMARY OF THE INVENTION It is an object of the present invention to provide an injection button having a tip stop function which can increase an injection amount by using such a needle valve having a tip stop function.

[0004]

In order to achieve this object, according to the present invention, according to the present invention, a ring-shaped seal is fitted to a stem projecting from the base end to the top of the aerosol container. An orifice closed by a member has a nozzle having a needle valve formed around the front end, and an operating member having a front surface and an upper surface along the front and upper surfaces of the nozzle, and is provided with a needle valve in the operating member. The lower part is supported by the nozzle so that the front part can be elastically returned to the rear by an operation of pushing down the upper surface part, and the front part falls backward when the stem is opened by the downward movement of the nozzle by the pushing operation. In the injection button with a chip stop function, the orifice is positioned in the front-rear direction in such a manner that the seal member is bent so that injection is performed forward through the opened orifice. With at least two stages consisting configured, subsequent orifice, characterized by opening the front portion of the operating member than to open the front of the orifice is brought defeated after large.

[0005] When the operating member is pressed down, the orifice at the forefront stage is opened and the stem is opened to eject the contents. When the push-down operation is released, the stem is closed in the process of returning the operation member and the orifice at the forefront stage is also closed, thereby preventing liquid dripping. If the degree of backward movement of the front portion of the operating member is further increased during the pushing-down operation, the orifice at the subsequent stage is also opened to increase the injection amount. When the orifice has three or more stages, the orifices are sequentially opened as the degree of backward movement increases.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An injection button with a tip stop function according to an embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 1, the injection button includes a vertical nozzle portion 11 serving as a vertical flow path for aerosol contents discharged from the aerosol container 1 and a horizontal tube portion into which a needle valve 20 is fitted at an upper end thereof. A nozzle 10 having a lateral nozzle portion 12 having a cover, a cover base 40 covering a peripheral surface except for a part of the front surface of the nozzle, and a cap 30 covering a rest and a top surface of the nozzle front surface. 9. This cover body functions as an operation member for moving the nozzle 10 downward.

A well-known valve mechanism is provided inside a mounting cap 2 attached to an opening at the top of the aerosol container 1, and a stem 3 projecting in an upwardly biased state is provided with a vertical nozzle portion. Fitting portion 13 at lower end of 11
Is fitted.

The needle valve 20 has a lateral flow path 21,
The tip surface 29 is closed, and around the tip,
Two-stage orifices 22 and 23 with different positions in the front-back direction
Are formed radially in four directions. These orifices are closed by an elastic common ring-shaped sealing member 25. The inner diameter of the rear orifice 23 is set to be, for example, about twice as large as that of the front orifice 22.

The cap 30 has a front surface 31 and a circular upper surface 32 which is bent rearward at a right angle at the upper end thereof.
The operating portion 32a is formed in a character shape, and an operating portion 32a is formed on the upper surface by a plurality of concave portions. The upper surface portion 32 is placed on the cover body base 40, and as shown in FIG. 2, on the back surface, a claw portion 38a engaged with a flange formed on the inner periphery of the upper end portion of the cover body base portion 40. Surrounding wall 3 with
8 and a holding piece 38b for holding the horizontal nozzle 12 are formed. A gap is provided between the upper surface of the nozzle 10 and the upper surface portion 32 to secure the downward stroke.

The front part 31 is formed in an arc shape coplanar with the cover base part 40, and the needle valve 2
A cylindrical injection port 37 surrounding the front end of the “0” protrudes, and an injection port 36 is formed at the front end thereof. On the inner peripheral surface of the injection port 37, a ring-shaped protrusion 39 that is in contact with the front end surface of the ring-shaped seal member 25 is formed.

In the lower portion of the nozzle 10 with respect to the needle valve 20, a connecting portion 19 is provided with an insertion hole 18 forward through a thin portion 19b so as to connect with a front lower peripheral portion 40a of a cover base 40. End portions 19a on both sides thereof are integrally connected to a lower end front peripheral portion 40a (see FIG. 3). A lower end portion 31a of the front surface portion 31 that is set back in a step shape is engaged with the insertion hole 18 and faces the lower end front peripheral portion 40a. The horizontal step forming surface 34 of the front surface 31 is mounted on the front lower peripheral portion 40a in a state where the upper surface 32 is mounted on the cover body base 40, and a retaining projection protruding forward is provided. Claw 35 for lower end front peripheral portion 40a
Is locked in a concave portion 45 formed on the inner peripheral surface of the rim.

As a result, the cap 30 is mounted on the cover body base 40 so as to form a cylinder, and the projection 39 comes into substantially contact with the seal member 25. When the operation unit 32a is pushed down, the cover body base 40 together with the cap 30 moves down the nozzle 10 with the thin portion 19b serving as a fulcrum while being lowered by bending, and the thin portion 1 is released when the push-down operation is released.
The elastic member 9b returns to the normal position by the elastic restoring force of the synthetic resin and the restoring force of the seal member 25.

The operation of the injection button configured as described above is as follows. When the central portion of the operating portion 32a is pushed down, the nozzle 10 is pushed down via the connecting portion 19 while the cover body 9 is tilted backward, and the stem 3 is moved down. At that time, the sealing member 25 is bent at the protruding portion 39 of the front surface portion 31 that falls backward, and the orifice 22 is first opened (FIG. 5A).
), And then the stem 3 opens to release the contents,
The fuel is injected forward from the injection port 36 along the injection port 37.
When the push-down operation is released, in the process of returning the cover body 9,
The stem 3, which has a strong upward biasing force, is first closed, and immediately thereafter, the orifice 22 is also closed by the relatively weak return force of the cover body 9, thereby preventing liquid dripping from the injection port 36, and a chip stop function. Fulfill.

In the above-described pressing operation, the upper surface portion 32
If the pushing force is further increased or the pushing position is shifted backward and pushed down to increase the swing degree θ of the front surface portion 31, the orifice 23 is also opened (see FIG. 5B), and the injection amount increases. Although the degree of opening of the orifice 23 is small in position, the injection amount is largely switched by the fact that the opening diameter is larger than that of the orifice 22.

Instead of the above-described embodiment, as shown in FIG. 6, a cylinder serving as a button body is formed as a nozzle 50, and an operation member 60 is formed by an inverted L having a shape along the front and top surfaces of the nozzle 50. It can also be formed in the shape of a letter-shaped plate. A projection 61 a formed at the lower end of the front surface 61 of the operation member 60 is engaged with the recess 51 a of the lower peripheral wall 51 of the nozzle 50. By pressing down the upper surface portion 62 of the operation portion 60, the orifice 22 is opened at the inner end edge of the injection port portion 66, and the nozzle 50 is moved down to open the stem 3, so that the lowering force of the upper surface portion 62 or the lowering position of the lowering position. The orifice 23 is opened by further narrowing the gap 65 by adjustment and further flexing the front portion 61 rearward by the bending elasticity of the synthetic resin.

[0016]

According to the first aspect of the present invention, it is possible to prevent the liquid from dripping from the injection port at the tip of the nozzle, and to increase the injection amount by increasing the stroke of the pressing operation. According to claim 2, the operating member is formed as a cover of the nozzle, or according to claim 3, as an inverted L-shaped plate. According to the invention of claim 4, the injection amount of the orifice at the retreat position can be compensated.

[Brief description of the drawings]

FIG. 1 is a sectional view of an ejection button with a tip stop function according to an embodiment of the present invention.

FIG. 2 is a bottom view of a cap of the injection button.

3A and 3B show a state where a cap and a needle valve of the injection button are removed, FIG. 3A is a front view, and FIG. 3B is a plan view.

FIG. 4 is a perspective view of the injection button.

5A and 5B are views for explaining the opening / closing operation of the orifice of the injection button, wherein FIG. 5A is a partial sectional view showing an open state of a front orifice, and FIG. is there.

FIG. 6 is a cross-sectional view of a spray button according to another embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Aerosol container 3 Stem 9 Cover body 10, 50 Nozzle 20 Needle valve 22, 23 Orifice 25 Seal member 31, 61 Front part of operation member 32, 62 Upper part of operation member 60 Operation member

Claims (4)

[Claims] 1. A nozzle having a needle valve fitted at a base end thereof to a stem protruding from a top of an aerosol container and having an orifice formed around a front end closed by a ring-shaped sealing member; An operating member having a front surface portion and an upper surface portion along the front surface and the upper surface of the nozzle, wherein a lower portion of the operation member below the needle valve swings rearward so that the front surface portion can be elastically restored by pressing down the upper surface portion. When the stem is opened by the downward movement of the nozzle by the downward operation, the front part falls down to deflect the seal member and spray forward through the opened orifice. In the injection button with the tip stop function, the orifice is composed of at least two stages having different positions in the front-rear direction, and the orifice of the rear stage is provided with the front orifice. An injection button with a chip stop function, which is opened when the front portion of the operation member is largely retracted backward rather than opening the orifice. 2. The ejection button with a tip stop function according to claim 1, wherein the operation member is a cover body that covers a peripheral surface and an upper surface of the nozzle. 3. The ejection button with a tip stop function according to claim 1, wherein the operation member is formed in an inverted L-shaped plate shape. 4. The injection button with a tip stop function according to claim 1, wherein the inner diameter of the rear orifice is relatively larger than the inner diameter of the first orifice.