JPH0687279U - Actuator for aerosol - Google Patents

Abstract

(57) [Abstract] [Purpose] A highly reliable uniform amount injection is possible without causing corrosion of internal members due to aerosol contents, and always stable aerosol contents injection is possible. [Structure] In the push button 2 between the nozzle 11 and the stem 1,
The piston body 6 is slidably inserted. This piston body 6
Through the flow path of the aerosol content 15 in the axial direction of. The pressure receiving area of the base end pressure receiving portion 14 provided on the base end side of the flow passage 15 is set to the tip end pressure receiving portion 1 provided on the tip end side of the flow passage 15.
It should be larger than the pressure receiving area of 3. In addition, the piston body 6,
When the piston body 6 is pressed by the pressing spring 16 in the direction of the stem 1 and the aerosol content is ejected, the pressing force of the pressing spring 16 is resisted and the flow of the aerosol content to the nozzle is restricted. Move the piston body 6 in the direction

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an actuator for an aerosol that ejects aerosol contents such as cosmetics, pesticides and pharmaceuticals. Even at the beginning of use when a large amount of aerosol content is filled in the aerosol container, and at the end of use when the content of the aerosol content decreases due to spraying of the aerosol content, it is always uniform. It is possible to inject the contents of the air volume in a certain amount.

[0002]

[Prior art]

 Conventionally, as described above, a device for quantitatively ejecting an aerosol content has an elastic body having concavities and convexities on both sides interposed in the flow path of the aerosol content, as invented in Japanese Utility Model Publication No. 39-29862. Exists. This elastic body is pressed and compressed by the spraying pressure of the aerosol content, and the height of the unevenness provided on both sides is changed according to the pressing force of the aerosol content. In this case, when the height of the unevenness is large, the flow path of the aerosol content is large, and when the height of the unevenness is small, the flow path of the aerosol content is also small.

As disclosed in Japanese Utility Model Laid-Open No. 1-122857, there is an elastic body whose both sides are flat so as to be pressed against a rough surface formed in a flow path of an aerosol content.

In any of the above cases, in the initial stage of spraying the aerosol content, the elastic body is pressed with a strong pressing force to deform or compress the uneven portion, thereby reducing the flow path of the content. . Further, when the ejection of the aerosol content progresses and the ejection pressure of the aerosol content decreases, this flow passage is enlarged.

Therefore, when the injection pressure is high, the flow passage is made small, and when the injection pressure is small, the flow passage is made large so that the ejection amount of the aerosol content does not relatively change.

[0006]

[Problems to be solved by the device]

 However, in the above-mentioned conventional examples, since the elastic body is interposed in the flow passage in all cases, the aerosol content and the elastic body often come into contact with each other to deteriorate the elastic body. In addition, it is technically difficult to deform the elastic body in response to the pressure so that the uneven portion is surely changed, and as a result, it is difficult to keep the ejection amount of the aerosol content uniform. It was

The present invention has been made in order to solve the above-mentioned problems, and operates without failing to use the elastic body such as rubber, and reliably responds to the pressure of the aerosol content. The aim is to be able to always maintain a constant injection amount of aerosol contents.

[0008]

[Means for Solving the Problems]

 In order to solve the above problems, the present invention provides a push button connected to the stem of an aerosol container with a nozzle for injecting aerosol contents, and slides a piston body in the push button between the nozzle and the stem. A sliding tube that is movably inserted and that protrudes toward the nozzle side of this piston body is slidably and closely inserted into the communication passage that connects the nozzle and stem. Part to the base end pressure receiving part on the stem side, it penetrates the flow passage of the aerosol content, and the pressure receiving area of this base end pressure receiving part is made larger than the pressure receiving area of the tip end pressure receiving part, and the piston body is It is formed by pressing and urging a pressing force in the direction of the stem, and restricts the flow of aerosol contents to the nozzle against the urging force of the pressing bar when the aerosol body is pressed by the injection of the aerosol contents. Direction sliding tube Those formed by the moved.

[0009]

[Action]

 Since the present invention is configured as described above, when the push button is pressed and the valve mechanism of the aerosol container is opened through the stem, the aerosol content is ejected from the stem into the push button and the flow passage of the piston body is opened. It is ejected from the nozzle through the nozzle.

Then, the aerosol content ejected from the stem flows through the flow passage and presses the base end pressure receiving portion, and presses the piston body toward the tip pressure receiving portion against the biasing force of the pressing spring. To do. At the same time, the aerosol content that has flowed through the flow passage tries to press the piston body toward the stem via the tip pressure receiving portion. However, since the pressure receiving area on the tip pressure receiving side is smaller than the pressure receiving area on the base pressure receiving side, the pressure on the base pressure receiving side is superior, and the piston body receives the pressure on the tip side through the restoring force of the pressure spring. Pressed to the side.

Due to this pressing, the pressure-receiving end side of the sliding tube comes into contact with the flow port that connects the nozzle and the communication path, and moves to the side where the flow area of the flow port is narrowed. Therefore, the high-pressure aerosol content is guided to the nozzle through the narrow distribution port, and the distribution of the aerosol content is restricted.

Further, when the injection of the aerosol content progresses and the pressure inside the aerosol container decreases, the pressing force against the base end pressure receiving part also decreases. It will be moved in the stem direction. As a result, the pressure-receiving end of the sliding tube moves in the direction of expanding the flow port through which the aerosol content flows. Therefore, the aerosol content of which the pressure has decreased is ejected from the nozzle through the large flow port.

As a result, the aerosol content ejected through the narrow distribution port at high pressure and the aerosol content ejected from the large distribution port at a low pressure have substantially the same ejection amount per unit time. Therefore, it is possible to inject a uniform amount of aerosol content from the beginning to the end of use.

[0014] Such a quantitative injection is particularly effective when a compressed gas, which has a large pressure change due to use, is used as a propellant for aerosol contents, and a large amount is injected at a strong pressure at the start of injection. However, it is possible to eliminate the conventional defect that only a small amount of aerosol content can be injected at a low pressure at the end of injection.

Further, according to the present invention, since the elastic body and the aerosol content are not brought into contact with each other as in the conventional case, the elastic body is not deteriorated and the aerosol content can be always sprayed uniformly. It is what

[0016]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. (1) is a stem, which is connected to a control valve of an aerosol container filled with a propellant such as a compressed gas and is pressed to control this. The valve is opened to inject the aerosol content. The stem (1) has its upper end connected and fixed to a connector (3) formed at the lower end of the push button (2).

Further, this connecting body (3) is connected and fixed to the lower end of the main body (4) of the push button (2) via an engaging portion (5), and the main body (4) and the connecting body (3). And forms a sliding chamber (7) for the piston body (6). A continuous passage (8) having an opening diameter narrower than that of the sliding chamber (7) is formed in the body (4) of the push button (2) continuously to the sliding chamber (7).

The communication passage (8) is provided with a flow port (10) continuously, and a nozzle (11) communicating with the flow port (10) is formed on a side surface of the main body (4). In addition, the piston body (6) is slidably inserted into the sliding chamber (7), and the sliding pipe (12) is inserted into the communication passage (8) of the piston body (6). It is inserted protruding. The sliding pipe (12) can flow together with the piston body (6) in the communication passage (8). Further, the piston body (6) has a base end pressure receiving portion (14) provided on the stem (1) side of the piston body (6) from a front end pressure receiving portion (13) provided at the front end of the sliding tube (12). A flow passage (15) through which the aerosol contents flow is formed through the air passage.

Further, the pressure-receiving portion (13) at the distal end of the sliding tube (12) has a smaller pressure-receiving area than the pressure-receiving portion (14) at the stem (1) side of the piston body (6). . In addition, by inserting a pressing spring (16) between the upper end surface of the sliding chamber (7) and the piston body (6), the piston body (6) is constantly pressed and urged toward the stem (1) side. ing.

Further, between the base end pressure receiving portion (14) of the piston body (6) and the connecting body (3), there is formed a retention space (17) for retaining the contents of the aerosol. Further, the communication passage (8) and the nozzle (11) are communicated with each other through the flow port (10), and the opening area of the flow port (10) on the tip pressure receiving portion (13) side of the sliding pipe (12). Is regulated.

In the configuration as described above, in order to inject the aerosol content, the stem (1) is pressed through the push button (2) and the control valve in the aerosol container is opened. By opening this valve, the aerosol content is introduced into the push button (2) via the stem (1). The introduced aerosol content flows into the retention space (17) formed between the base pressure-receiving portion (14) and the connecting body (3), presses the base pressure-receiving portion (14), and flows. It is introduced into the communication passage (8) via the passage (15).

The aerosol content that has flowed into the communication passage (8) presses the pressure receiving portion (13) at the tip end, but the pressure receiving area of the base end pressure receiving portion (14) is larger than the pressure receiving area of the tip pressure receiving portion (13). Since the area is larger, the piston body (6) moves toward the tip pressure receiving portion (13) against the urging force of the pressing bar (16), and connects the communication passage (8) and the nozzle (11). Move in a direction that limits the opening area of the mouth (10).

Therefore, the opening area of the flow port (10) through which the aerosol content flows is limited. Then, the high-pressure aerosol content at the beginning of use is sprayed to the outside from the nozzle (11) through the flow port (10) whose opening area is limited.

Further, when the aerosol content continues to be jetted and the remaining amount of the aerosol content decreases, the jetting pressure of the aerosol content also drops, so the aerosol content to the base end pressure receiving section (14) The pressing force of the object also decreases.

Since the pressing force of the aerosol content on the proximal pressure receiving portion (14) decreases, the pressing force of the pressing bar (16) causes the piston body (6) to move in the stem (1) direction. Becomes Therefore, the tip end pressure receiving portion (13) in the communication passage (8) moves in a direction to expand the opening area of the flow port (10), and the aerosol content having a low pressure has a large opening area. It will be injected from the nozzle (11) to the outside through the mouth (10).

As a result, the high-pressure aerosol content flows through the small opening area flow port (10), and the low-pressure aerosol content flows through the large opening area flow port (10). Therefore, the amount of aerosol content ejected from the nozzle (11) per unit time is almost the same, and it is possible to always eject a uniform amount of aerosol content.

[0027]

[Effect of device]

 Since the present invention is configured as described above, it does not cause corrosion or the like of internal members due to the aerosol content, enables highly reliable uniform amount injection, and always enables stable aerosol content injection. It is what

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention.

[Explanation of symbols]

 1 Stem 2 Push Button 6 Piston Body 8 Communication Passage 11 Nozzle 12 Sliding Pipe 13 Tip Pressure Receiving Portion 14 Base Pressure Receiving Portion 15 Flow Passage 16 Pressing Stroke

Claims (1)

[Scope of utility model registration request] 1. A push button connected to a stem of an aerosol container is provided with a nozzle for injecting aerosol contents, and a piston body is slidably inserted into the push button between the nozzle and the stem. The sliding tube protruding toward the nozzle side of the body is slidably and closely inserted into the communication passage that communicates the nozzle and the stem, and the sliding tube projects from the tip side pressure receiving section on the nozzle side to the base pressure receiving side on the stem side. Through the flow path of the aerosol content, and the pressure receiving area of this base pressure receiving part is made larger than the pressure receiving area of the tip pressure receiving part, and the piston body is pressed and biased in the stem direction by the pressing spring. When the piston body is pressed by the injection of the aerosol content, the sliding tube is moved in the direction that restricts the flow of the aerosol content to the nozzle against the biasing force of the pressing spring. Characterized by Aerosol actuator.