JPH0248269B2 - JUDENSHIKIDENKIKAMISORI - 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 inside 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. It has the following characteristics.

[Conventional technology]

Recently, rechargeable electric razors that can be washed with water and soap have become popular, and their cases are sealed to ensure waterproofness.

On the other hand, this type of storage battery releases gas (hydrogen gas) when it is overcharged. That is, the anode terminal is provided with a safety valve that releases gas to the outside when the internal gas pressure of the storage battery increases.

[Problem to be solved by the invention]

In such sealed rechargeable electric shavers, if the gas from the storage battery fills the main body case, there is a risk of a gas explosion, the main body case may become deformed due to the increase in internal pressure, and there is a risk of corrosion of the electrical parts. Problems such as contact failure occur.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a closed type rechargeable electric shaver that can eliminate the conventional problems by directly discharging gas from a storage battery to the outside of the case without releasing it into the main body case.

[Means to solve the problem]

As shown in the figure, the rechargeable electric shaver of the present invention has a storage battery 4 equipped with a gas release safety valve built into a main body case 1, and a cylindrical body 12 whose base end surrounds the gas release safety valve side of the storage battery 4 via a gasket 20. A gas vent hole 10 communicating with the outside of the main body case 1 is formed on the tip side of the cylindrical body 12, and a valve 13 for opening and closing the gas vent hole 10 is installed in the internal cavity of the cylindrical body 12. That is.

[Effect]

The storage battery 4 is equipped with a safety valve for releasing gas at the anode terminal portion 4a, and the opening base end of the cylinder 12 airtightly surrounds the safety valve of the storage battery 4 via the packing 20, so that the gas discharge from the safety valve is is released into the cylinder 12 without passing through the main body case 1.

The gas released into the cylinder body 12 is directly discharged to the main body case 1 side through the gas vent hole 10 when the valve 13 built into the cylinder body 12 opens.

〔Effect of the invention〕

According to the present invention, the gas from the storage battery 4 can be directly released to the outside of the main body case 1 through the cylinder 12, and the gas does not flow into the main body case 1 to cause it to become full. Therefore, gas explosions can be prevented, and electrical components inside the main body case 1 can be reliably protected from corrosion caused by the gas.

Further, since the cylinder body 12 is provided with a valve 13 for opening and closing the gas vent hole 10, the gas vent hole 10 is closed by the valve 13 when not charging. It is possible to reliably prevent water and other dust from entering the body 12, and maintain good degassing performance over a long period of time.

〔Example〕

The drawings show an embodiment of a washable closed type rechargeable electric shaver according to the present invention.

In FIG. 2, the main body case 1 is made of plastic and has a sealed structure, and an outer cutter 2 and an inner cutter 3 that slides on the inner surface of the outer cutter 2 are attached to the upper part of the main case 1. Although not shown, a drive mechanism for driving the inner cutter 3, a motor for this drive mechanism, a storage battery 4 such as a nickel-cadmium alkaline storage battery, etc. are built inside.

This storage battery 4 is equipped with a gas release safety valve near the anode terminal portion 4a at the lower end.

The bottom of the main body case 1 is provided with a plug-in connection part 7 that allows a plug-in connection of a charging member 6 connected to a commercial power source. This plug-in connection part 7 has a recess 8 formed in the bottom wall of the main body case 1 so as to open downward.
The recess 8 has charging power supply pins 9, 9 protruding through the inner inner wall 8a thereof, and the power supply pins 9, 9 are connected to the input end of the charger.

In such a rechargeable electric shaver, the present invention is characterized in that the plug-in connection portion 7 is provided with a degassing means. In FIG. 1, as the gas venting means, a gas venting hole 10 is opened between the power supply pins 9, 9 on the inner back wall 8a of the recess 8 so as to penetrate inside and outside the case, and the gas venting hole 10 is opened inside the case. A cylindrical body 12 is integrally formed upright from the inner back wall 8a. This cylindrical body 12 has an open top, and a valve seat 11 is formed in a stepped shape on the inner circumferential surface of the lower end, and a vertically movable valve 13 is provided inside the cylindrical body 12 and the valve 13 is directed toward the valve seat 11. The spring 14 is provided with a spring 14 that is biased by the pressure. The upper end (base end) of the cylinder 12
The opening edge of the storage battery 4 is airtightly connected to the lower end of the storage battery 4 via a packing 20 made of an O-ring so as to surround the outer periphery of the anode terminal portion 4a including the gas release safety valve. A large number of vertical grooves 1 are formed in the upper inner peripheral surface of the cylinder 12, as shown in FIG.

The charging member 6 has a pair of connection holes 17 and 1 in which a spring 16 is installed as shown in FIGS. 2 and 3.
7, and an operating protrusion 18 protruding from between the connection holes 17, 17. When charging member 6 is inserted into recess 8 from below of main case 1 during charging, connection holes 17, 17 are connected to power supply pins. 9 and 9 respectively. At the same time, the operating protrusion 18 engages in the gas vent hole 10, and the valve 13 is pushed open inward of the case against the spring 14 under the pressing action of the operating protrusion 18.
Therefore, due to overcharging, the anode terminal 4a of the storage battery 4
The gas released from the safety valve is released into the cylindrical body 12 without leaking into the main body case 1, and this cylindrical body 1
The battery is discharged to the outside of the main body case 1 through a gap between the vertical groove 19 in the inside 2 and the circumferential edge of the valve 13, and then through a gap formed between the recess 8 and the plug part of the charging member 6.

When the charging member 6 is removed from the recess 8 after charging is completed, the valve 13 closes the gas vent hole 10 again under the pressure of the spring 14, so that water and dust can be trapped in the gas vent hole when washing the electric shaver. It does not enter into the cylindrical body 12 from 10. In addition, in the illustrated example, the valve 1 is
3 is seated on the valve seat 11 to reliably close the gas vent hole 10.

When stored, used, or in a non-charging state, it is difficult for objects, fingertips, etc. to enter the recess 8 to the innermost side. In addition, the power supply pin 9 functions to further prevent the intrusion of objects and the like and protect the gas vent hole 10. Therefore, deformation or damage to the gas vent hole 10 provided in the inner wall 8a of the recess 8 can be reliably prevented.

[Another embodiment example]

Instead of providing the operating protrusion 18 on the charging member 6 side, it is provided on the valve 13 side and protrudes from the gas vent hole 10 into the recess 8, so that a part of the charging member 6 comes into contact with the operating protrusion 18. Alternatively, the valve 13 may be pushed open.

Further, the power supply pin 9 may be provided on the charging member 6 side, and the connection hole 17 into which the power supply pin 9 is inserted may be provided on the insertion connection portion 7 side of the main body case 1.

[Brief explanation of drawings]

The drawings illustrate the rechargeable electric shaver according to the present invention, and FIG. 1 is an enlarged longitudinal sectional front view of the main parts, and FIG.
3 is a longitudinal sectional front view of main parts in a charged state, and FIG. 4 is an enlarged sectional view taken along the line A-A in FIG. 3. DESCRIPTION OF SYMBOLS 1... Main body case, 4... Storage battery, 4a... Anode terminal part, 6... Charging member, 7... Plug-in connection part, 8... Recessed part, 8a... Inner wall of recessed part, 9...
Power supply pin, 10... Gas vent hole, 12... Cylindrical body, 1
3...Valve, 14...Spring, 19...Vertical groove, 20...
...Patsukin.

Claims (1)

[Claims] 1. A storage battery 4 equipped with a gas release safety valve is built into the main body case 1, and has a cylinder 12 whose base end surrounds the gas release safety valve side of the storage battery 4 via a gasket 20; This rechargeable electric shaver has a gas vent hole 10 that communicates with the outside of the main body case 1 on the tip side of the body 12, and a valve 13 for opening and closing the gas vent hole 10 is installed in the internal cavity of the cylindrical body 12.