JPS6217979Y2 - - Google Patents

Description

[Detailed description of the invention] The present application is designed to have a rechargeable battery stored in the main body case, like a facial beauty device or an electric razor, and use this battery to drive a motor to operate a rotational operating part or a reciprocating operating part. In the configured portable electric appliance,
Oxygen gas or hydrogen gas released when the battery is charged or discharged fills the sealed battery chamber and increases the pressure, damaging the main body case or leaking gas and igniting sparks from the motor or electrical contacts. It is designed to prevent dangers such as explosions caused by explosions, and to ensure safe use.

The following is a detailed description of the embodiments with reference to the drawings: 1
For example, Japanese Patent Publications No. 56-32938 to No. 56-7417
A main body case 2 made of synthetic resin that constitutes the facial beauty device shown in the publication is a battery chamber provided in a sealed manner in the lower part of the main body case 1, and a rechargeable battery 3 is housed in this battery chamber 2. has been done. A concave valve chamber 4 is connected to the battery chamber 2, and an annular locking rib 5 is provided at the mouth of the battery chamber 2, and a valve hole 6 communicating with the outside air is provided at the center of the bottom. A valve body 7 made of an elastic material is interposed within the valve chamber 4 . The valve body 7 includes a cylindrical base 7a and a truncated pyramid-shaped tapered cylindrical portion 7b integrally formed as shown in FIG. 3A;
As shown in ``B'' in the same figure, a conical tapered tube part 7b is integrally formed on a cylindrical base 7a, or as shown in ``C'' in the same figure, a truncated pyramid-shaped tapered tube part 7b is formed in a rectangular tube-shaped base 7a. An integrally formed one is used, and the outer diameter of the base has a size that allows it to fit tightly into the valve chamber 4, and a locking groove 7c that locks with the locking rib 5 is formed on the outer periphery. , and the tip opening of the tapered cylindrical portion 7b is normally sealed due to the elasticity of the valve body itself.

As shown in FIG. 1, by engaging the retaining groove 7c with the retaining rib 5, the valve body 7 is interposed within the valve chamber 4, and its base 7a is tightly fitted into the valve chamber 4, and the tip thereof is is fitted into the valve hole 6. In this state, when the gas generated from the battery 3 fills the battery chamber 2 and the gas pressure inside the chamber exceeds, for example, 3 kg/cm ² , the valve body 7 expands and becomes as shown in FIG. The tip thereof escapes from the valve hole 6 to open the valve hole 6, and at the same time, the tip of the tapered cylindrical portion 7b also opens, and the gas in the battery chamber 2 is released to the outside air.

Therefore, according to the present application, when the gas pressure in the battery chamber exceeds a predetermined set value, the valve hole and the end opening of the valve body open and automatically release the gas in the battery chamber, thereby ensuring safety. In addition, the valve body isolates the battery chamber from the valve chamber, preventing dirt and moisture from entering the battery chamber, and therefore has the advantage that there is no risk of malfunction or electrical leakage. have

[Brief explanation of the drawing]

The drawings show an embodiment of the present application, and FIGS. 1 and 2 are sectional views of the main parts, and FIG. 3 is a perspective view of the valve body. In the figure, 1 is the main body case, 2 is the battery compartment, 3 is the battery,
4 is a valve chamber, 5 is a locking rib, 6 is a valve hole, 7 is a valve body,
7a is a base portion, and 7b is a tapered cylindrical portion.

Claims (1)

[Scope of claims for utility model registration] (1) Battery compartment 3 provided in a sealed manner within the main body case 1
A valve chamber 4 having a valve hole 6 communicating with the outside air is connected to the valve chamber 4, and a cylindrical base 7a is provided in the valve chamber 4.
and a tapered cylindrical part 7b are integrally formed, and a base part 7a of a valve body 7 is interposed therebetween, and its tip is fitted into the valve hole 6. Safety device. (2) A safety device for a power appliance with a built-in battery as claimed in claim 1, wherein the valve body 7 includes a cylindrical base 7a and a truncated pyramid-shaped tapered tube part 7b. (3) A safety device for a power appliance with a built-in battery as set forth in claim 1, wherein the valve body 7 includes a cylindrical base 7a and a truncated conical tapered cylindrical portion 7b. (4) A safety device for a power appliance with a built-in battery as claimed in claim 1, wherein the valve body 7 includes a rectangular tube-shaped base portion 7a and a truncated pyramid-shaped tapered tube portion 7b.