JPH01244790A - Rechargeable electric razor - Google Patents

Abstract

PURPOSE:To effectively prevent the deformation and damage of a vent hole and to satisfactorily secure a venting performance for a long period by projecting a feeding pin for charging into a recessed part and providing the vent hole for discharging a gas from a storage battery to a main body case external part in the internal back side part of the recessed part. CONSTITUTION:A member 6 for charging has a pair of connecting holes 17 and 17 in which springs 16 are mounted and an operation projecting part 18 projected from a point between said connecting holes 17 and 17. When the member 6 for charging is inserted from the lower side of a main body case 1 into a recessed part 8 at the time of charging, the connecting holes 17 and 17 are inserted into feeding pins 9 and 9, simultaneously, the operation projecting part 18 is engaged into a vent hole 10, a valve 13 receives the pressing work of the operation projecting part 18, and it is press-opened in a case internal direction in resistance to a spring 14. Consequently, the gas generated from a storage battery 4 due to an overcharge is made to pass a gas route 15 and the vent hole 10 and discharged through a void formed between the recessed part 8 and the plug part of the member 6 for charging to the main body case an external part without filling the main body case 1 internal part.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a rechargeable electric shaver with a built-in storage battery inside a four-body case, and is characterized by means for releasing gas generated from the storage battery due to overcharging to the outside of the main body case.

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

However, with a sealed main body case, problems arise such as 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, and causing contact failure due to the gas.

Focusing on this fact, this invention prevents the internal pressure of the case from increasing due to the gas generated during overcharging by providing a gas vent hole in the insertion connection part of the two main body cases, thereby preventing case deformation and contact failure. At the same time, it is an object of the present invention to provide a rechargeable electric shaver that can simplify the operation of opening and closing the gas vent hole.

The details will be explained below based on the drawings.

FIG. 1 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. The case 1 has a drive mechanism for driving the inner blade 3 (not shown), a motor for this mechanism, and a storage battery such as a nickel-cadmium alkaline storage battery. Furthermore, a charger 5 connects the output end to the storage battery 4.
etc. are built-in. The bottom of the main body case 1 is provided with an insertion connection part 7 into which a plug 6 can be inserted. The plug-in connection part 7 is provided with a recess 8 at the bottom of the main body case 1, and plug teeth 9, 9 protrude from the bottom of the recess 8, and the plug teeth 9, 9 are connected to the input end of the charger.

In such a rechargeable electric shaver, the present invention provides the plug-in connection 7 with gas venting means. In FIGS. 2 and 3, the gas venting means has a gas venting hole 10 that is opened between the plug teeth 9 and 9 at the bottom of the recess 8 so as to penetrate inside and outside the case, and a valve seat 11 is provided inside the case of the gas venting hole 10. ．． A valve housing 12 is formed to cover the upper part of the valve seat 11, and the valve 13 in the valve housing 12 is always pressed with a spring 14 above the valve seat 11.

It is assumed that the gas vent hole 10 is always closed by the valve 3. Note that a gas passage 15 is formed between the opening lower end of the valve housing 12 and the valve seat 11, which communicates the inside of the main body case 1 with the gas vent hole 10.

In such a case, a pair of connection holes 17 in which springs 16 are installed
17 and an operating protrusion 18 protruding from between the connection holes 17 and 17, and when charging, if the plug 6 is inserted into the recess 8 from below of the main case 1,
The connecting holes 17, 17 are inserted into the plug teeth 9, the operating protrusion 18 is inserted into the gas vent hole 10, and the valve 13 is inserted into the operating protrusion 1.
The case is pushed open inward against the spring 14 by the abutting and pressing action of the case 8. Therefore, gas generated from the storage battery 4 due to overcharging does not fill the main body case 1, but is released to the outside of the main body case 1 through the gas passage 15 and the gas vent hole 10, and through the gap between the recess 8 and the plug 6. be done.

When the plug 6 is pulled out from the recess 8 after charging is completed.

Since the valve 13 closes the gas vent hole 10 again by the force of the spring 14, water will not enter the case from the gas vent hole 10 even if the electric shaver is washed with water or the like.

FIG. 4 shows another modified embodiment of the above gas venting means. Considering that the storage battery 4 is generally equipped with a safety valve for gas release on the positive electrode terminal 4a, a gas venting hole 10 of the recess 8 is provided with a gas venting hole 10 inside the case. A cylindrical valve housing 12 is formed which is open at the top and has a vertical groove 19 on the inner periphery, and the positive terminal portion 4a of the storage battery 4 is arranged to face the upper open end of the valve housing 12 through a packing 20.

Place the valve 13 inside the valve housing 12 onto the valve seat 11 of the gas vent hole 10.
The gas vent hole 10 is always closed by the valve 13, which is always pressed by the spring 14 via the ring 21. In this case, the valve 13 is simultaneously pushed open when the plug 6 having the operating protrusion 18 is inserted during charging, as in the above embodiment. The gas released from the main body case 1 is released only into the valve housing 12 without entering the main body case 1.

The gas passes through the gap between the vertical groove 19 in the valve housing 12 and the periphery of the valve 13 and is discharged from the gas vent hole 10 to the outside of the case.

Note that instead of providing the operating protrusion 18 on the plug 6 side,
As shown in FIG. 6, it may be provided on the valve 13 side and protrude from the gas vent hole 10.

Plug-in connection part 7 provided on a part of the outer surface of the main body case 1
The plug 6 to be inserted therein is not limited to the one of the above-mentioned embodiment type, and in addition, for example, plug teeth 9 may be provided on the plug 6 side, and connection holes 17 into which the plug teeth 9 are inserted.
may be provided on the insertion connection part 7 side of the main body case 1, and the opening/closing direction of the valve 13 is not limited to the same direction as the direction in which the plug 6 is inserted. It can also be arranged perpendicular to the direction.

As explained above, the rechargeable electric shaver of the present invention is provided with a gas vent hole 10 penetrating inside and outside the case in the insertion connection part 7 of the main body case 1, and a valve 13 for closing the gas vent hole 10 directed toward the inside of the case. It is mounted so that it can be pushed open, and is provided with means for always biasing the valve 13 in the closed position with a spring, so that the valve 13 is pushed open by the abutting and pressing action of the plug 6 inserted into the insertion connection part 7. be. Therefore, the gas vent hole 10 can be opened at the same time as the charging operation of inserting the plug 6, and the gas generated during overcharging can be released from the gas vent hole 10 to the outside of the case, preventing an increase in the internal pressure of the case. Deformation and contact defects can be eliminated.

Another advantage is that the valve 13 of the gas vent hole 10 can be opened at the same time as the plug 6 is inserted, and automatically closed by the spring bias when the plug 6 is removed, making it extremely easy to open and close the gas vent hole 10. There is.

[Brief explanation of the drawing]

FIG. 1 is a partially cut-away front view showing an example of a rechargeable electric shaver according to the present invention, and FIG. 2 is a cut-away perspective view of its insertion connection and a perspective view of its plug. FIG. 3 is a cross-sectional view of the plug-in connection shown in a state where the plug is inserted, FIG. 4 is a cross-sectional view showing another modified embodiment of the plug-in connection, and FIG. 5 is an enlarged cross-sectional view taken along the line V-V in FIG. 4. , 6th
The figure is a sectional view showing yet another modified embodiment of the plug-in connection. ■...Body case. 2...Outer blade. 3...Inner blade. 4...Storage battery. 5... Charger. 6...Plug. 7...Plug-in connection part. 10...Gas vent hole. 13. Valve. 14...Spring.

Claims (1)

[Claims] (1) A storage battery 4 is built into the main body case 1, and a part of the outer surface of the main body case 1 is provided with an insertion connection part 7 including a recess 8 into which a charging member 6 can be inserted. This rechargeable electric shaver has a power supply pin 9 projected therein, and a gas vent hole 10 for discharging gas from the storage battery 4 to the outside of the main body case 1 at the innermost part of the recess 8.