JPH01244784A - Rechargeable electric razor - Google Patents

Abstract

PURPOSE:To prevent the deformation of a case and a contact defect due to a gas generated at the time of an overcharge and a discharge by composing a sealing plate of a film or sheet having the gas permeability. CONSTITUTION:A flexible sealing plate 16 to block a void between an internal blade driving shaft 14 and a shaft guide hole 13 is composed of a gas permeable film or sheet not to pass water and to permeate the gas. For the permeable film or sheet, for example, a polytetrafluoroethylene, especially, a low-density polyethylene film or sheet in which a gas permeability degree is large is preferable. In such a case, when the gas is generated from a storage battery 7 at the time of the overcharge and discharge, it fills a main body case 1 internal part, while when a case internal pressure is increased, the gas permeates the sealing plate 16 and is discharged from the mesh of an external blade 3 or from the voide between the external blade 3 and a holder 4, thus the case internal pressure is lowered, and thereby, the deformation of the case and the contact defect can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a rechargeable electric shaver that has a built-in storage battery that is a power source for driving the inner blades, and is resistant to overcharging.

It is characterized by the fact that it takes measures against electrical discharge.

Recently, rechargeable electric razors that can be washed with water and two soaps have become popular, but because these require waterproofing, the main body case is sealed.

However, with a sealed main body case, the internal pressure of the case increases due to the gas generated from the nickel-cadmium alkaline storage battery during overcharging, causing deformation of the case, or causing abnormal bulge or misalignment of the waterproof sealing mechanism 1, such as the banking. Problems arise such as tightness and contact failure due to gas.

Such gas generation occurs not only in an overcharged state but also in an overdischarged state.

This invention focuses on this fact and eliminates overcharging.

When the internal pressure of the main body case increases due to the gas generated during discharge, the gas is automatically released outside the case to prevent case deformation and contact failure.

Another object of the present invention is to provide a rechargeable electric shaver in which the degassing can be effectively achieved by simply changing the material of the sealing plate for preventing hair intrusion installed in the main body case.

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 constructed of a sealed plastic molded product. An outer cutter holder 4 holding a mesh outer cutter 3 covering the upper side of the surface 2 is removably mounted, and an inner cutter 5 that slides into contact with the inner surface of the outer cutter 3 is mounted. The main body case 1 includes a motor-type drive mechanism 6 that vibrates the inner blade 5 back and forth at high speed in the left-right direction with a constant small stroke, and a storage battery 7 such as a nickel-cadmium alkaline storage battery that is the power source for this mechanism 6. do. The drive mechanism 6 has a balance weight 10 fixed to the output shaft 9 of a motor 8, and this way) 1
The eccentric bottle 11 implanted in the hair receptacle 1 is engaged with an elastically deformable plastic vibrator 12 to cause it to reciprocate from side to side. It is supported via a holder 15 at the shaft end of an inner cutter drive shaft 14 that is integrated with the vibrator 12 and protrudes from a laterally elongated shaft guide hole 13 that opens approximately in the center. And inner blade drive shaft 1
4 and the shaft guide hole 13 is closed with a sealing plate 16 to prevent hair debris accumulated on the hair receiving surface 2 from entering the main body case 1. The sealing plate 16 is.

It is made of a flexible and deformable material so as not to interfere with the reciprocating vibrations of the inner blade drive shaft 14, and its center part is tightly fitted and locked in the circumferential groove 17 provided on the drive shaft 14, and its peripheral part is fitted into the shaft guide hole 1.
A sealing material 18 is held and fixed to the upper part of the hole edge 3. Further, the bottom of the main body case 1 is recessed with a plug-in connection part 20 into which a plug 19 can be freely inserted during charging, and the plug teeth 21 provided in the plug-in connection part 20 are connected to a charger (not shown) in the main body case 1. The storage battery 7 is connected to the input end of the charger, and the storage battery 7 is connected to the output end of the charger.

In such a rechargeable electric shaver, the flexible sealing plate 16 of the present invention is made of a breathable film or sheet that does not allow water to pass through but allows gas to pass through.

A plastic film or sheet is used as the breathable film or sheet.2For example, polytetrafluoroethylene,
A low-density polyethylene film or sheet with high gas permeability is preferred.

In such a case, gas is generated from the storage battery 7 during overcharging or discharging and fills the main body case 1, and when the internal pressure of the case increases, the gas passes through the sealing plate 16 and enters the mesh of the outer blade 3 or the outer blade. 3 and the holder 4 to the outside to lower the internal pressure of the case. This is because the sealing plate 16 can be formed to have a relatively wide area.

It is also possible to increase the amount of gas permeation per hour.

In addition, the sealing plate 16 has a large area and is flexible, so that it can expand and moderate sudden changes in gas pressure.

Moreover, this sealing plate 16 does not allow water to pass through and can be washed with water.

Even if soap is used, water will not enter into the main body case 1.

Note that the drive mechanism 6 in the above embodiment may be of a magnetic type instead of a motor type.

Needless to say, it is also replaced by a reciprocating inner blade.

This method can also be applied to a rotary inner cutter.

As explained above, the rechargeable electric shaver of the present invention has a simple construction in which the flexible sealing plate 16 that closes the gap between the inner blade drive shaft 14 and the shaft guide hole 13 is composed of one breathable film or sheet. By means of this method, it is possible to prevent the internal pressure of the case from rising due to gas generated during overcharging and discharging, thereby eliminating case deformation and contact failure.
This can be carried out extremely easily by simply replacing the . Further, the sealing plate 16 is present at a location covered by the outer cutter 3 and the holder 4, and there is no fear that external force will be applied to the sealing plate 3, and the degassing operation can be performed for a long period of time.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a partially cutaway front view showing an example of a rechargeable electric shaver according to the present invention. 1... Main body case. 2... Hair receiving surface. 3...Outer blade. 5...Inner blade. 6... Drive mechanism. 7...Storage battery. 13...Axle guide hole. 14...Inner blade drive shaft. 16... Sealing board.

Claims (1)

[Claims] (1) The inner blade drive shaft 14 is protruded from the shaft guide hole 13 opened in the hair receiving surface 2 of the sealed main body case 1, and the gap between the inner blade drive shaft 14 and the shaft guide hole 13 is flexible. The main body case 1 includes a storage battery 7, which is closed by a sealing plate 16.
A rechargeable electric shaver incorporating a drive mechanism 6 for driving the inner cutter drive shaft 14 using a storage battery 7 as a power source, wherein the sealing plate 16 is made of a breathable film or sheet.