JPH0450714B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a rechargeable electric appliance such as an electric shaver.

[Background technology]

In waterproof rechargeable electrical equipment, in order to achieve a waterproof structure and to prevent hydrogen gas generated from storage batteries from filling and igniting and exploding,
A device equipped with a degassing filter that allows gas to pass through but not water is being considered. Conventional examples of this type are shown in FIGS. 7 to 10. First of all, Figure 7 is the first
A hole 71 is formed in the bottom of the case 70, and the second case 7 is inserted into the first case 70 through an O-ring 72.
3 is attached to the second case 73, and a filter 74 that allows gas to pass through but does not allow water to pass through is provided in the second case 73. Furthermore, a third case 75 is attached to the second case 73 to form a gas vent hole 76. However, this device had the disadvantage of having a large number of parts and a complicated structure.

FIG. 8 shows a case 78 in which a filter 74 is provided on the inner edge of the gas vent hole 77. In this case, when a foreign object such as a needle is accidentally inserted into the gas vent hole 77, the filter 74 is removed. It had the disadvantage of being damaged.

FIG. 9 shows a case 79 in which a gas vent hole 81 is passed through a charging recess 80, 82 is a filter, and 83 is a charging terminal. However, in this case as well, since part a of the gas vent hole 81 is formed at the bottom of the recess 80, there is a risk that the filter 82 may be damaged if a needle or the like is inserted through the opening of the recess 80.

FIG. 10 shows a charging recess 80 with a gas vent hole 81'.
It is open only on the inner side. but,
This wall portion 8 forms a gas vent hole 81'.
1'a, the exposed area of the filter 82 is reduced by the thickness b, which has the disadvantage of deteriorating gas removal efficiency.

[Purpose of the invention]

An object of the present invention is to provide a rechargeable electric device that has a simple structure, can prevent damage to the filter, and has good gas removal efficiency.

[Disclosure of the invention]

The rechargeable electric device of the present invention includes a main body that stores a storage battery in a hollow part, has a charging recess formed on the outer surface, and has a charging terminal provided in the charging recess, and a main body that is adjacent to the charging recess. a gas vent hole that is bored in the inner surface of the hollow part and communicates a vent hole between a vertical wall surface formed at the opening edge of the inner surface and a vertical wall surface of the inner surface of the charging recess;
a gas venting filter disposed on the edge of the opening of the gas venting hole, and a vertical wall surface of the gas venting hole communicating with the venting hole and a vertical wall surface of the charging recess are on the same plane. It is characterized by this.

According to the configuration of the present invention, the exposed area of the gas venting filter is wider than the conventional one by the wall thickness between the vertical wall surface of the rechargeable recess and the vertical wall surface of the gas venting hole, so gas ventilation efficiency is improved. Moreover, since the ventilation holes are formed only on the inner surface, it is possible to prevent the filter from being damaged by foreign objects such as needles, and the structure is simple.

A waterproof and rechargeable electric shaver according to an embodiment of the present invention will be described with reference to FIGS. 1 to 6. That is, 1 is a main body containing a motor (not shown) and a storage battery 2, 3 is a blade, 4 is a switch, and 5 is a lower cover. Storage battery 2 is battery base 2
A battery anode terminal 6 welded to the anode of the storage battery 2 and a cathode terminal 7 electrically connected to the cathode of the storage battery 2 protrude from the lower end of the battery base 24 through rubber gaskets 8 and 9. . The lower cover 5 contacts the lower end opening of the main body 1 via O-rings 10 and 11, and is attached to the main body 1 with screws 12.
The lower cover 5 has a charging recess 13 formed on its outer surface, and has a through hole in the bottom surface 14 of the recess 13 so that the anode terminal 6 and the cathode terminal 7 protrude into the recess 13. Further, a filter mounting recess 15 is formed on the inner surface of the lower cover 5 facing the main body 1, and a gas vent hole 16 is formed in the filter mounting recess 15 so as to be adjacent to the charging recess 13. The gas vent hole 16 is formed so that the vertical wall surface formed at the opening edge of the inner surface and the vertical wall surface of the inner surface of the charging recess 13 are located on the same plane, so that the vent hole 17 is formed on the vertical wall surface.
(FIG. 5), and the filter 18 is closely fixed to the opening edge of the gas vent hole 16 by heat sealing or the like. The filter 18 is a seal-shaped filter made of tetrafluoroethylene resin, and has pores of about 1 μm that allow air to pass through but not water.

FIG. 4 shows the charging state, in which the charging recess 13 of the electric shaver is fitted into the protruding part 20 of the charging adapter 19, which is a charger containing a step-down transformer, a rectifying diode, etc. (not shown), and the protruding An elastic hook 21 provided on the portion 20 is engaged with a vent hole 17 which also serves as a charger engagement recess. In this engaged state, the anode terminal 6 and cathode terminal 7 are inserted into the holes of the protrusion 20.
is inserted and makes electrical contact with the internal adapter terminals 22 and 23. In this way, the storage battery 2 is charged, and the gas generated during charging is filtered through the filter 1.
8, the gas is discharged to the outside through the gas vent hole 16, its ventilation hole 17, and the recess 13.

Because of this structure, according to this embodiment, the thickness b of the wall portion 81'a for opening into the recess 13 is reduced compared to the one in FIG. The exposed area is expanded, and gas ventilation efficiency can be improved within the limited installation space of the filter 18. In addition, since the ventilation hole 17 opens only on the inner surface of the recess 13 and does not open on the bottom surface, even if a foreign object such as a needle is inserted through the opening of the recess 13, it is difficult to reach the filter 18.
Damage to the filter 18 can be prevented. In this case, by arranging the anode terminal 6 at a position opposite to the ventilation hole 17 as shown in FIG. 2, it is possible to prevent needles and the like from entering the ventilation hole 17. Furthermore, by engaging the elastic hook 21 provided on the charging adapter 19 with the ventilation hole 17 during charging, the feeling when attaching and detaching the charging adapter 19 is enhanced, and the hook 2
1, it is possible to ensure a consistent holding force during attachment and detachment, and the structure is simplified because the ventilation hole 17 also serves as the charger engagement recess.

FIG. 6 shows a modification of the vertical wall surface formed at the opening edge of the inner surface of the gas vent hole 16' and the charging recess 1.
3 is on the same plane as the vertical wall surface, but there is a Z-shape between the vent hole 17' formed in the vertical wall surface and the opening edge of the gas vent hole 16'. The difference is that it is bent. Thereby, foreign objects such as needles can be more reliably prevented from reaching the filter 18.

〔Effect of the invention〕

According to this invention, the exposed area of the filter can be expanded, gas ventilation efficiency can be improved, damage to the filter can be prevented, and the structure is simple.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of essential parts of an electric shaver according to an embodiment of the present invention, FIG. 2 is a bottom view thereof, FIG. 3 is an external perspective view of the electric shaver, FIG. 4 is a sectional view showing the charging state, and FIG. 5 is a view indicated by arrow A in FIG. 1, FIG. 6 is a front view of a modification thereof, and FIGS. 7 to 10 are sectional views of a conventional example. 1... Main body, 2... Storage battery, 6... Anode terminal, 7... Cathode terminal, 13... Charging recess, 16... Gas vent hole,
17...Air vent, 18...Filter, 19...Charging adapter.

Claims (1)

[Scope of Claims] 1. A main body in which a storage battery is housed in a hollow part, a charging recess is formed on the outer surface, and a charging terminal is provided in the charging recess; A gas vent hole that is bored in the inner surface of the hollow part and communicates a vent hole between a vertical wall surface formed at the opening edge of the inner surface and a vertical wall surface of the inner surface of the charging recess, and this gas vent hole. and a gas venting filter disposed on the edge of the opening, wherein a vertical wall surface of the gas venting hole communicating with the ventilation hole and a vertical wall surface of the charging recess are on the same plane. Rechargeable electrical equipment. 2. The rechargeable electric device according to claim 1, wherein the vent hole of the gas vent hole also serves as a charger engagement recess.