JPH0353711Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention is an improved stem rubber that is attached to the neck of the stem of an aerosol sprayer commonly used at home for cosmetics, insecticides, etc.

(Prior art) Stem rubber has a center hole, and when the small diameter neck of the stem is inserted into the hole and the small horizontal hole opening on the outer surface of the neck is sealed with the center hole surface, when the stem is pushed down, the upper step When pressed down, it bends inward and opens a horizontal hole, acting as a valve to release the contents. The stem receives the lower side of the stem rubber inserted into the small diameter neck with the enlarged brim of the stem. Therefore, the flow path from the housing to the small lateral hole is closed by the central hole surface of the stem rubber that is in close contact with the outer surface of the small diameter neck portion and the lower surface portion of the stem rubber that is in close contact with the enlarged collar of the stem.

By the way, stem rubber is used by selecting the most suitable material for the contents, but due to its characteristic gas barrier, gas leakage inevitably occurs after a long period of time. Since the outer surface of the stem rubber is a flat surface, such gas leakage can easily occur outside through extremely small gaps that are likely to form at the contact area with the stem, or gaps that are likely to form at the contact area with the upper end surface of the valve barrel or the inner surface of the central bulge. may occur in addition to the gas barrier. Although a gas barrier is unavoidable due to its nature and is acceptable because it can withstand long-term use, inadvertent gas leakage will destroy commercial value.

(Purpose of the invention) The purpose of the invention is to prevent gas leakage from the contact surface between the mounting surface of the stem rubber and the outer surface of the rubber.

(Structure of the invention) In order to achieve the above object, the invention is characterized in that embossing such as satin finish, grain, paper grain, etc. is applied to one or both sides of the stem rubber. For this reason, the stem rubber has minute and shallow unevenness and patterns irregularly on its outer surface, making it possible to attach it stably when it comes into contact with the stem member, etc., and also to allow for stable installation when it comes into contact with the stem member, etc., and also to allow it to fit along the outer surface of the rubber leading to the small side hole and the outside when the valve is sealed. It can prevent gas leakage by blocking the flow.

Hereinafter, the drawings showing the embodiments of the present invention will be described. FIG. 1 is a longitudinal cross-sectional view of the valve component 1;
These installations are known. 2 is the stem, 3
5 is a small diameter neck portion of the stem that opens the small horizontal hole 4, and 5 is an enlarged collar portion of the stem that receives the lower edge of the center hole 7 of the stem rubber 6. The small horizontal hole 4 of the stem 2 is sealed with the circumferential surface of the center hole 7 of the stem rubber 6, and the flow path from the valve chamber 8 to the small horizontal hole 4 is blocked by closely contacting the upper surface of the enlarged flange portion 5 of the stem 2. do. Reference numeral 9 denotes a valve cylinder, which supports the stem 2 in the valve chamber 8 with a push-up spring 10.

Reference numeral 11 denotes a mountain cap that seals the upper surface of the can body, and supports the upper end of the valve cylinder 9 with its central bulging portion 11a, and the stem rubber 6 is clamped and fixed by the valve cylinder 9. The stem rubber 6 has an unavoidable gas barrier due to its nature, and therefore, after a long period of time, gas leaks through the inside of the rubber to the outside from the valve chamber 8 and the center hole 12 of the central bulge 11a. However, this leakage from the gas barrier does not affect the product value and is allowed. A normal flow path from the valve chamber 8 to the outside is established by opening and closing the valve in the small horizontal hole portion using the stem rubber 6. The valve chamber 8 is isolated from the outside by the stem rubber 6. That is, the stem rubber 6 has its lower surface placed on the mounting portion 9a of the valve cylinder 9.
The enlarged flange 5 of the stem 2 is supported, and the upper surface is supported by the lower surface of the central bulge 11a, and the stem 2 is kept sealed by these supporting surfaces. However, since the stem rubber 6 has a flat surface, it easily flows along the surface and its pressure is applied directly to the support surface. Therefore, if strong or weak parts occur in the support surface after the stem is operated, minute gaps will be created, and the support surface will become weak due to aging of the stem rubber 6, creating minute gaps, which will cause inadvertent gas leakage from these gaps. .

As shown in the perspective view of Fig. 2, the stem rubber 6 of the present invention has a processed surface 6a with minute and shallow unevenness or irregular patterns by embossing on one or both sides with satin finish, grain, paper grain, etc. Ta. According to this stem rubber 6, the contact between the machined surface 6a, the valve barrel 9, and the stem 2 can be stably maintained by crushing the minute irregularities on the machined surface, and the gas flow along the outer surface can be maintained stably. Due to the irregularities and irregularly patterned obstacles of 6a, it becomes diffuse and weak against the supporting surface. Therefore, the stem rubber of the present invention has practical value in that it can simply and easily prevent gas leakage other than gas barriers.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view, and FIG. 2 is a slope view. DESCRIPTION OF SYMBOLS 1... Valve component, 2... Stem, 6... Stem rubber, 6a... Machining surface, 7... Center hole of stem rubber.

Claims (1)

[Scope of utility model registration request] A stem rubber for an aerosol sprayer, which is one of the valve components of the aerosol sprayer, and the outer surface of the stem rubber 6 is provided with an embossed surface 6a having an irregular micro-uneven pattern such as satin finish, wrinkles, paper grain, and plasto.