JPS635807Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a ventilation valve for a spray pump, and its purpose is to have a simple structure, easy to form, and stable operation.

Hereinafter, the drawings showing the embodiments of the present invention will be described. Fig. 1 is a side view of one of the pump components suspended and fixed to a fixed cap 3, and 1 is a valve cylinder with a vent hole 2 opened on the outer periphery of the upper end. , 4 is a valve stem, 5 is a spray button, 6 is a suction pipe, and 7 is a thin plate sheet made of an elastic material.

The thin sheet 7 is made of an elastic material such as a rubber material or a soft synthetic resin, and is formed into a ring-shaped cylinder having opposing free ends 7a and 7b as shown in FIG. An annular groove 8 is provided along the circumferential direction. The thin sheet 7 is formed into a small piece having an arcuate cross section that matches the outer shape of the valve cylinder 1, as shown in FIG. Then, the thin plate sheet 7 is fixed to the outer periphery of the cylindrical portion of the valve cylinder 1 at the vent hole 2 portion. The means for fixing to the valve barrel 1 is to provide an annular convex portion 10 along the circumference above the vent hole 2, and to attach the thin plate sheet 7 of the ring-shaped tube to the outer shape of the valve barrel 1 while elastically sandwiching it. The annular recess 8 is fitted and tightly fixed, and the free end 7c of the lower part of the cylinder contacts the opening outer end surface of the vent hole 2.
Another method is to provide a mounting hole 11 on the outer periphery of the valve cylinder above the vent hole 2, forcibly fit and fix the small convex portion 9 of the thin plate sheet 7 into the mounting hole 11, and fix the small convex portion 9 of the thin plate sheet 7 into the mounting hole 11, so that the free end portion 7c is connected to the vent hole. It circumscribes and seals the outer end opening surface of 2.

As shown in the partially enlarged sectional view of the valve barrel 1 in FIG. 3, the thin plate seal 7 fixed to the upper outer periphery of the valve barrel 1 seals the vent hole 2, interrupts communication between the inside and outside of the container, and operates the pump. When the inside of the container becomes negative pressure, the free end 7c of the thin plate seal 7 bends outward to open the ventilation hole 2 into the inside of the container.
The ventilation path through 2 communicates with the inside of the container, eliminating the negative pressure state, and these repeated operations continue the ventilation valve operation.

A bulge 13 is provided on the inner surface of the free end 7c facing the ventilation hole 2.
Modifications are made to improve the sealing effect by providing a valve seat 14 of the bulging portion 13 at the outer end of the vent hole 2. Further, the means for fixing the valve cylinder 1 and the thin plate seal 7 described above may have a fitting structure opposite to the above structure.

FIG. 5 is an enlarged sectional view of a modified embodiment of the thin plate seal 7 and the mounting structure. The valve cylinder 1 is provided with a fitting recess 8 for a thin plate seal 7 on its outer periphery around a vent hole 2 opened in the peripheral wall. The thin plate seal 7 has a fitting protrusion 9 on its inner surface facing the fitting recess 8 to form a fitting structure with the valve barrel 1 . Furthermore, a free end portion 7c is provided inside the thin plate seal 7 via a cut groove 11 with a connecting portion 10 left in a part thereof, and a bulge portion 13 is provided on the inner surface of the free end portion 7c so as to be closely connected to the outer end surface of the vent hole 2. and cut off communication between the inside of the container and the outside.

As described above, when the inside of the container becomes negative pressure, the free end 7c separates from the vent hole 2 and communicates with it, and these repeated operations continue the vent valve operation.

In the present invention, as described above, the thin plate sheet 7 is fixed to the two parts of the vent hole of the valve cylinder by a concave and convex fit, and the vent valve is formed by using the seal on the vent surface as the contacting and separating end. Covers the pores in a small area, and
It has the advantage that it can be fixed securely and that it can easily and smoothly adapt to negative pressure inside the container, making it a stable vent valve.

[Brief explanation of the drawing]

FIG. 1 is a side view of the pump components, FIG. 2 A is a perspective view of a ring-shaped thin plate seal, B is a perspective view of a small piece-shaped thin plate seal, and FIG. 3 is a partially enlarged sectional view of the valve barrel.
Figure 4 A and B are enlarged cross-sectional views of the valve barrel and seal part.
FIG. 5 is a partially enlarged sectional view of a modified embodiment of the valve barrel and seal portion. DESCRIPTION OF SYMBOLS 1... Valve cylinder, 2... Vent hole, 7... Thin plate seal, 8... Annular groove, 9... Small convex part, 10... Annular convex part, 11... Mounting hole.

Claims (1)

[Scope of utility model registration request] A valve cylinder 3 has a ventilation hole 2 that penetrates the upper peripheral wall and communicates with the inside of the container and the outside through a center hole of a fixed cap of the valve cylinder, and a thin plate seal 7 is circumscribed on the outer surface of the valve cylinder at the part of the ventilation hole 2, and , a ventilation valve for a spray pump, which is provided with a fixed part that fits into the mounting part with the valve cylinder 3, and a free end part 7c that can be brought into contact with and separated from two surfaces of the ventilation hole.