JPS6122578A - Charging type electric appliance - Google Patents

Abstract

PURPOSE:To prevent a filter from breaking with simple construction by forming a concave having a storage battery inside and housing a charging terminal on the outside while providing specifically a vent hole furnished with a filter for gas ventilation on said concave inside face. CONSTITUTION:A charging system electric appliance such as a waterproof and charging system electric shaver or the like is formed by housing a storage battery 2 inside the appliance proper 1 while fitting up a cover 5, where a concave 13 for charging is formed on the lower end, and providing charging terminals 6 and 7 inside said concave 13. Thereby, a vent hole 16 connected to an air hole 17 is provided while being positioned on the same plane with its inside face and on its junction part followed by tightly fixing a filter 18 of permeable but waterproof tetrafluoroethylene resin or the like to the fixing concave 15 to become a side hole edge of said appliance proper 1 with a heat seal. Accordingly, the exposed area of the filter 18 can be enlarged while surely preventing the filter 18 from breaking due to alien substances.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to rechargeable electric appliances such as electric shavers.

[Background technology]

For waterproof rechargeable electrical equipment, in order to achieve a waterproof structure and to prevent the hydrogen gas generated from the storage battery from filling up and igniting, causing an explosion, gas venting filters are used that allow gas to pass through but not water. A system is being considered that has a Conventional examples of this type are shown in FIGS. 7 to 1θ. First, in FIG. 7, a hole 71 is formed in the bottom of a first case 70, and a first goo: 1. A second case 73 is attached via a F0KQ resig 72, a filter 74 that allows gas to pass through but does not allow water to pass through is provided in the second case 73, and a third case 75 is installed.
is attached to the case 73 of '@2 to form a gas vent hole 76. However, this device had the disadvantage of having a large number of parts and a complicated structure.

No. 8N has a filter 74 installed in the inner hole l# of the gas vent hole 77 of the case 78, but when a foreign object such as a needle is accidentally inserted into the gas vent hole 77 of the case 78, the filter 74 It had the disadvantage of being damaged if it was damaged.

FIG. 9 shows a gas vent hole 81 in the charging recess 80 of the case 79.
82 is a filter, and 83 is a charging terminal. However, also in this case, since part a of the gas vent hole 81 is formed on the bottom surface of the recess 80, the recess 80
By inserting a needle or the like through the opening of the filter 82
may be damaged.

In FIG. 10, a gas vent hole 81' is opened only on the inner surface of the charging recess 80. However, this device has a drawback that the exposed area of the filter 82 is reduced by the thickness of the wall portion 81/h that forms the gas vent hole 81' by 6 minutes, resulting in poor gas venting 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 a filter, and has good gas removal efficiency.

[Disclosure of the invention]

In the rechargeable electric device of the present invention, the inner surface of the charging recess formed on the outer surface of the device main body and the inner surface of the gas vent hole bored in the inner surface of the device main body are formed on the same plane, and It is characterized by communicating the ventilation holes and disposing a filter on the edge of the gas vent hole inside the main body. The exposed area of the filter is wider due to the thickness of the wall that forms the conventional charging recess.
Moreover, since the vent holes in the recess are formed only on the inner surface, it is possible to prevent the filter from being damaged by foreign objects such as needles.

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 23 containing a motor (not shown) and a storage battery 2, a blade portion, 4 a switch, and 5 a lower cover. The storage battery 2 is held on a battery base 6, and from the lower end of the battery base 6, a battery anode terminal 6 welded to the anode of the storage battery 2 and a cathode terminal 7 connected to the cathode of the storage battery 2 are connected with a rubber gasket 8°. Protruding through 9. lower cover 5
contacts the lower end opening of the main body 1 via an O-ring 10.11 and is attached to the main body 1 with a screw 12. The lower cover 5 has a charging recess 13 formed on its outer surface, and has a through hole in the bottom 14 of the recess 13 to connect the anode terminal 6 and cathode terminal 7 to the recess 1.
It is made to protrude within 3. Also, the main body 1 side of the lower cover 5 and
A filter mounting recess 15 is formed on the inner surface, and a gas vent hole 16 is formed in the filter mounting recess 15. Gas vent hole 1
6 has a part of the inner surface for charging as shown in Figure 1! ! I fJ
5), the filter 18 is heat-sealed, etc., in the mounting recess 15 that forms the edge of the gas vent hole 16 on the main body 1 side (Fig. 5). The filter 18, which is tightly fixed in place, is a sheet-like material made of polytetrafluoroethylene resin, and has pores of about 1 μm that allow air to pass through but not water.

FIG. 4 shows the charging state, and the charging recess 13 of the electric shaver is attached to the protruding part 20 of the charging adapter 19, which is a charger containing a step-down transformer, a rectifying diode, etc. (not shown).
The elastic hook 21 provided on the protrusion 20 is engaged with the ventilation hole 17. In this locked state, the anode terminal edge and the cathode terminal 7 are inserted into the hole of the protrusion 20 and electrically contact the internal adapter terminals 22, 23. The storage battery 2 is charged in this way, and the gas generated during charging is filtered through the filter 18. Gas vent hole 16. It is discharged to the outside through the ventilation hole 17 and the recess 13.

Because of this configuration, according to this embodiment, the 10th
Wall portion 81 for opening into recess 13 compared to that shown in the figure.
The gas vent hole 16 of the filter 18 is removed by the amount that the color thickness b is not.
The limited mounting of the filter 18 can improve gas ventilation efficiency within the space.

Further, 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 will not reach the filter 18.
damage can be prevented. In this case, by arranging the cathode terminal 6 at a position facing the ventilation hole 170 as shown in FIG. 2, it is possible to prevent needles and the like from entering the ventilation hole 17. Furthermore, by engaging the nine elastic hooks 21 to the ventilation holes 17 of the adapter 12 during charging, the adapter 1
2, and by holding it with the hook 21, 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 hook retaining recess.

FIG. 6 shows a modified example, in which a part of the inner surface of the gas vent hole 16' and the inner surface of the recess 13 are on the same plane! ii
i! Same as the example, but the vent hole 1 is the polymerized part.
7' and the edge of the mounting recess 15 side of the gas vent hole 16' are bent into a double shape.

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 drawings]

FIG. 1 is a cross-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, and FIG. 4 is a cross-sectional view showing a rechargeable shaver. Figure 5 is the first
The arrow A in the figure, FIG. 6 is a front view of a modified example, and FIGS. 7 to 10 are sectional views of a conventional example. 1...Main body, 2...Storage battery, 6...llI! Pole terminal, 7... Cathode terminal, 13... Charging recess, 16.
...Gas vent hole, 17...Vent hole, 18...Filter, 19...Charger adapter i3E Fig. 4 Fig. 5 Fig. 6 Fig. 8vA

Claims (2)

[Claims] (1) A device body with a storage battery inside, a charging recess formed on the outer surface, and a charging terminal provided in the recess; A rechargeable type device comprising a gas vent hole located on the same plane as the side surface and with a vent communicating with the overlapping portion thereof, and a gas vent filter disposed on the edge of the gas vent hole on the device main body side. 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.