JPH01244787A - Rechargeable electric razor - Google Patents

Abstract

PURPOSE:To prevent the deformations of respective parts of a main body case 1 due to the rise of a case internal pressure, the corrosions of electric parts, and a contact defect by providing a vent route to pass a gas discharged from the safety valve for discharging the gas of a storage battery 4 to the head part of a cap and facing the discharge port of the vent route to the external surface one part of the main body case. CONSTITUTION:A cap 11 has a gas discharging cylinder part 10 in a shape narrowed to be thin in the head part to cover a positive electrode terminal part 13 having the safety valve for discharging the gas of the storage battery 4, and a vent route 12 is formed to penetrate cap internal and external parts in said gas discharging cylinder part 10. In such a way, the gas or an electrolyte discharged from the safety valve for discharging the gas of the positive electrode terminal part 13 of the storage battery 4 due to an overcharge, etc., is directly discharged through the vent route 12 of the gas discharging cylinder part 10 to the external part of the main body case 1. By the gas discharged from the storage battery 4, the cap 11 is expanded since the internal pressure is increased, the cap 11 can be made into contact with a battery supporting body 20 well by the expansion, and thereby, the storage battery 4 can be stably and surely supported in the main body case 1.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement of a rechargeable electric shaver that incorporates a storage battery that is a power source for driving the inner blades, and is characterized in that it takes measures against overcharging.

Recently, rechargeable electric razors that can be washed with water and two soaps have become popular, but since these require waterproofing, the two body cases are sealed.

However, with a sealed main body case, problems arise such as the internal pressure of the case increases due to gas generated from the alkaline storage battery during overcharging, causing deformation of the case, and causing contact failure due to the gas.

Focusing on this fact, the present invention has developed a rotating or reciprocating inner blade structure that can prevent case deformation and contact failure by directly discharging gas generated from the storage battery to the outside of the case during overcharging. The aim is to provide a rechargeable electric shaver.

The details will be explained below based on the drawings.

The drawing shows an example of a rechargeable electric shaver according to the present invention, in which a main body case 1 is made of plastic and has a sealed structure, and the upper part of the case 1 has an outer cutter 2 and an inner cutter that slides on the inner surface of the outer cutter 2. Blade 3 is installed, and there are 2 inside the case 1.
Although not shown, a drive mechanism for driving the inner blade 3, a motor for driving this, and a storage battery 4 such as a cadmium alkaline storage battery. It also has a built-in charger that connects the output end to the storage battery 4. The bottom of the main body case 1 is provided with a plug-in connection part 6 into which a plug 5 is inserted during charging. The plug-in connection part 6 forms a recess 7 at the bottom of the main body case 1, and a plug tooth 8 at the bottom of the recess 7.
8 protrudes, and the plug teeth 8, 8 are of standard specification to be connected to the input terminal of the charger.

In such a rechargeable electric shaver, the present invention provides an elastic shaver that is entirely funnel-shaped and made of rubber or the like, and that has a crown part 9 and a gas discharge cylinder part 10 that projects integrally by narrowing a part of the crown part 9. Prepare camp 11, and install its gas discharge cylinder part 1.
A narrow gas passage 12 penetrating inside and outside the crown part is formed at the crown part 0.

The elastic cap 11 utilizes the elasticity of the crown 9 to cover the portion of the storage battery 4 having the safety valve for gas release, that is, the positive electrode terminal 13. The strip 14 is fitted and locked in a circumferential groove 15 already provided in the positive terminal portion of the circumferential surface of the storage battery 4 in a manner that prevents it from coming off. The large diameter portion 16 is inserted into a hole 17 formed at the bottom of the recess 7 until it comes into contact with the bottom of the recess 7, and is exposed to the outside of the case. Note that the gap between the gas discharge cylinder 10 and the hole 17 is filled with a sealing material 18.
Seal the case to prevent water from entering the case. This sealing material 18 is not particularly required, and waterproofness can be maintained by simply connecting two large-diameter bulging portions 16 like a gourd and elastically engaging the constricted portions with the holes 17 of the case 1. can. Further, the lead wire 19 from the positive terminal 13 of the storage battery 4 is passed through a part of the crown 9 or, as shown in the figure, between the joint surface between the circumferential surface of the storage battery 4 and the crown 9 attached thereto. derive.

In such a case, when overcharging, the positive terminal 1 of the storage battery 4
The gas generated from the gas release safety valve No. 3 is released into the interior of the crown portion 9, and when the internal pressure of the crown portion 9 increases, the gas is released to the outside of the main body case 1 through the gas passage 12, so that the internal pressure of the main body case 1 increases. This will prevent it from rising.

In addition, the gas passage 12 of the gas discharge tube 10 facing the outside of the main body case 1 is formed to be as small as possible within the range that allows gas to be released. Even if there is, there is no risk of water entering the case from the gas passage 12.

To further prevent water from entering from outside the case,
Assuming that the gas passage 12 is tightly closed by the elasticity of the gas discharge cylinder part 10 itself under normal conditions, e = that the gas passage 12 expands and expands under this gas pressure for the first time when gas is discharged, allowing gas to pass through. good.

If the tip of the gas discharge tube 10 faces the recess 7 of the insertion connection 6 as shown in the example shown in FIG. The tip of the gas discharge cylinder part 10 may be made to face the other outer surface part of the gas discharge cylinder part 10.

Further, the crown portion 9 of the elastic cap 11 can be configured to cover not only the positive electrode terminal portion 13 of the storage battery 4 but also the entire positive electrode terminal portion 13.

As explained above, in the rechargeable electric shaver of the present invention, the gas generated from the storage battery 4 during overcharging is passed through the inside of the elastic cap 11 that covers the storage battery 4 and released to the outside of the main body case 1. As a result, there is no fear of an increase in the internal pressure of the case, and it is possible to completely prevent case deformation, contact failure, etc., and the elastic cap 11 can be easily processed by rubber molding or the like.

It has the advantage that it can be easily attached to and detached from the storage battery 4, making replacement easier.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway front view showing an embodiment of a rechargeable electric shaver according to the present invention, and FIG. 2 is an enlarged view of the main parts thereof. 1... Main body case. 2...Outer blade. 3...Inner blade. 4...Storage battery. 9... Crown. 10... Gas discharge cylinder part. 11...Elastic cap. 12...Gas passage.

Claims (1)

[Claims] (1) In a rechargeable electric shaver that has a storage battery 4 sealed inside the main body case 1, the entire outer circumference of the storage battery 4 is covered with a cap 11,
A gas vent passage 12 is provided at the tip of the cap 11 to pass the gas released from the safety valve for gas release of the storage battery 4. A rechargeable electric razor characterized by having a part of its outer surface exposed.