JPH0342910B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a rechargeable electric shaver with a built-in storage battery in the main body case, and a means for releasing gas generated from the storage battery due to overcharging to the outside of the main body case. Has characteristics.

[Conventional technology]

In this type of storage battery, gas is generated inside the battery due to overcharging, etc., so a safety valve is provided at the anode terminal portion to release gas to the outside of the battery when the internal gas pressure increases.

On the other hand, closed-type rechargeable electric shavers that have such a storage battery hermetically built into the main body case are becoming popular in order to enable washing with water.

[Problem to be solved by the invention]

In such a sealed rechargeable electric shaver,
If the gas (hydrogen gas) released from the storage battery diffuses and fills the main body case, there is a risk of a gas explosion.
In addition, the main body case may become deformed due to the increase in internal pressure,
Furthermore, problems such as corrosion of other electrical parts and contact failure occur due to gas and leaked electrolyte.

Focusing on this fact, the present invention provides a rechargeable electric shaver with a storage battery sealed inside the main body case, in which the gas and electrolyte emitted from the storage battery are released directly outside the main case without being diffused inside the main case. The purpose is to eliminate the aforementioned problems.

[Means to solve the problem]

To achieve the above object, the present invention provides a rechargeable electric shaver in which a storage battery 4 is hermetically built into a main body case 1, in which the entire outer periphery of the storage battery 4 is covered with a bag-shaped cap 11;
The lower bag opening covers the gas release safety valve provided on the lower surface of the storage battery 4, and the gas release tube 10 having the gas release passage 12 extends downward from the lower bag opening of the cap 11. The opening of the lower end of the gas venting passage 12 must face the bottom of the main body case 1.

[Effect]

Gas and electrolyte from the storage battery 4 are once released into the lower bag opening of the cap 11 via a gas release safety valve on the lower surface of the battery. Next, these gases and electrolyte flow into the gas venting passage 12 of the gas discharge cylinder section 10 located directly below, and are discharged as they are from the opening at the lower end of the gas venting passage 12 to the outside of the bottom of the main body case 1.

〔Effect of the invention〕

Therefore, according to the present invention, since the entire outer periphery of the storage battery 4 is covered with the bag-shaped cap 11, the gas and electrolyte discharged from the storage battery 4 are discharged from the lower bag opening of the cap 11 through the gas vent passage 12. Then, it is directly released to the outside of the bottom of the main body case 1, and the conventional problems caused by diffusion inside the main body case 1 can be eliminated.

If the main body case 1 is placed in a standing position with the bottom resting on a desk or the like, the electrolyte discharged from the storage battery 4 into the lower bag opening of the cap 11 will drip into the gas venting passage 12 directly below. It will be discharged to the outside of the main body case 1 from the lower end opening of 12. Therefore, unlike a configuration in which the degassing passage 12 is provided in a detour, the electrolytic solution can also be properly discharged to the outside of the main body case 1 without clogging.

〔Example〕

The drawing shows an example of a rechargeable electric shaver according to the present invention, in which a body case 1 is made of plastic and has a sealed structure. The inner blade 3 that is in contact with the inner blade 3 is attached, and inside the main body case 1, although not shown, there is a drive mechanism for driving the inner blade 3, a driving motor for this, a storage battery 4 such as a nickel-cadmium alkaline storage battery, and a storage battery at the output end. It has a built-in charger that connects to 4. Note that the storage battery 4 is positioned and supported by a battery support 20 provided inside the main body case 1.

The bottom of the main body case 1 is provided with an insertion connection part 6 into which a plug 5 as a charging member connected to a commercial power source is inserted. The plug connection part 6 is
A recess 7 is formed in the bottom wall of the main body case 1, and power supply pins 8, 8 for charging are protruded through the inner inner wall of the recess 7, and the power supply pins 8, 8 are connected to the input end of the charger. It is a standard specification that is connected.

In such a rechargeable electric shaver, the entire outer periphery of the storage battery 4 is covered with a cap 11 made of an elastic material such as rubber. That cap 11
The inner circumferential portion 14 is fitted and locked into a circumferential groove 15 already provided on the outer circumferential side of the storage battery 4 in a manner to prevent it from coming off. The cap 11 is entirely formed in the shape of a bag, and its bag opening is located below, and this lower bag opening covers an anode terminal 13 with a safety valve for gas release provided on the lower surface of the storage battery 4. At the lower bag opening of the cap 11, there is provided a gas discharge cylinder section 1 having a gas vent passage 12.
A gas venting passage 12 is connected to the lower bag opening of the cap 11, and the open end of the lower end of the gas venting passage 12 faces the bottom of the main body case 1. . That is, a hole 17 is provided in the inner inner wall of the recess 7 in a penetrating manner, and the gas discharge tube 10 is inserted into the hole 17 from inside the main body case 1 and fixed, and the gas release passage 12 is fixed.
The opening at the lower end of the groove 7 faces into the recess 7. At this time, a bulging large-diameter portion 16 is formed on the outer periphery of the midway portion of the gas discharge cylinder portion 10, and this bulging large-diameter portion 16 forms the concave portion 7.
The gas discharge cylinder part 10 is inserted into the hole 17 until it comes into contact with the inner surface side of the inner inner wall of the gas discharge cylinder part 10 .

The gap between the gas discharge tube 10 and the hole 17 is sealed with a sealing material 18 to prevent water from entering the case. This sealing material 18 is not particularly required, and the bulged large diameter portion 16
Waterproofness can be maintained simply by connecting two of them like a gourd and elastically engaging the constricted part with the hole 17 of the main body case 1.

Further, a lead wire 19 from the anode terminal portion 13 of the storage battery 4 is led out from a part of the cap 11.

In such a case, the gas or electrolyte released from the gas release safety valve of the anode terminal part 13 of the storage battery 4 due to overcharging etc. will be removed from the gas release passage 12 of the gas release cylinder part 10.
It is directly discharged to the outside of the main body case 1 through. In addition, the gas emitted from the storage battery 4 increases the internal pressure of the cap 11 and expands it, and this expansion brings it into close contact with the battery support 20. Therefore, there may be dimensional errors between the storage battery 4 and the battery support 20. Even if this occurs, the dimensional error can be absorbed and the storage battery 4 can be stably and reliably supported within the main body case 1.

Note that the gas vent 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 a range that allows gas to be released, so that the electric shaver can be washed with water or soap can be used. Even if
There is no risk of water entering the main body case 1 through the gas vent passage 12. In order to more completely prevent water from entering from outside the case, the gas vent passage 12
Under normal conditions, the gas discharge tube 10 is tightly closed by its own elasticity, and the gas vent passage 12 is expanded and expanded by the gas pressure only when gas is discharged, allowing gas to pass through.

The tip of the gas discharge tube 10 can be effectively protected from external objects by facing the recess 7 as shown in the example shown, but the tip is not limited to this. The tip of the gas discharge cylinder part 10 may be exposed to a part of the surface.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway front view illustrating a rechargeable electric shaver according to the present invention, and FIG. 2 is an enlarged longitudinal sectional front view of the main parts thereof. 1...Body case, 2...Outer blade, 3...Inner blade,
4...Storage battery, 11...Cap, 12...Gas vent passage.

Claims (1)

[Claims] 1. In a rechargeable electric shaver with a storage battery 4 sealed inside a main body case 1, the entire outer periphery of the storage battery 4 is covered with a bag-shaped cap 11, and the lower bag opening of the cap 11 covers a safety valve for gas release provided on the bottom surface of the storage battery 4, and a gas release passage 1 is provided at the lower bag opening of the cap 11.
The rechargeable electric shaver is characterized in that a gas discharge tube 10 having a gas discharge tube 10 is provided to extend downward, and the open end of the lower end of the gas discharge passage 12 faces the bottom of the main body case 1.