JPS6233703B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a charger for, for example, a waterproof electric shaver, and the present invention relates to a charger for, for example, a waterproof electric shaver. To provide a charger with a waterproof cover formed on the top of the battery charger to prevent misuse when used with the waterproof cover open.

Embodiments of the present invention will be described in detail below with reference to the drawings. FIG. 1 shows a perspective view of a waterproof electric shaver that can be held with one hand.A housing body 1 is formed by two housings 1a and 1b, and a circular blade 10 is provided on the upper surface of the housing body 1. It is formed protrudingly,
A waterproof push-button operation switch 9 for rotationally driving the inner cutter is provided on the side. Further, a plug blade block 4 connected to an AC power source e for charging the battery 2 is rotatably mounted in a storage recess 5 on an end side surface of the housing body 1. A waterproof cover 6 for sealing the opening of the storage recess 5 is rotatably disposed about a shaft 11.
When charging, the battery 2 is charged by opening the waterproof cover 6 as shown in FIG. It is.

More specifically, FIGS. 2a and 2b show cross-sectional views of the blade block 4 and the waterproof cover in the storage recess 5 provided in the housing body 1. L-shaped partition wall 12 of housing 1a forming housing body 1
A substantially rectangular storage recess 5 is formed by the housing 1b and the other housing 1b.
A cylindrical rotation fulcrum part 1 integrally protrudes from the inner surface of the
3 and 13 are formed facing each other, and a shaft hole 15, 15 is bored in the center of each rotation fulcrum part 13, 13. 17 is the shaft hole 1 of the rotation fulcrum part 13 at one end.
This current-carrying metal fitting 1 is arranged around the battery 2 and the other end is connected to a charging circuit that charges the battery 2.
7 is insert-molded and embedded and fixed in both housings 1a and 1b. Furthermore, this current-carrying metal fitting 1
One end of 7 is a pivot point 13 as shown in Fig. 2b.
It is formed into a cylindrical shape so as to be disposed on the inner circumferential surface of the shaft hole 15, and has a hole substantially the same as the shaft hole 15 in the center thereof. Reference numeral 18 denotes a cylindrical projection protruding from the inner surface of the housing 1a in order to fix both housings 1a and 1b. A screw hole is bored in the center of this projection 18, and a fixing screw 19 is inserted through the housing 1b. Both housings 1 are screwed together.
a and 1b are fixed. Furthermore, the support shaft 22
Although the bearing on which the energizing member is pivotally supported is integrated with the current-carrying metal fitting 17, the current-carrying metal fitting 17 may be configured like a so-called brush.

The plug blade block 4 includes two plug blades 3, 3 connected to an AC power source e, and a shaft portion 2 integrally molded at the base of the plug blades 3 with synthetic resin in order to insulate and fix both the plug blades 3, 3.
0, and the shaft part 20 is further formed with a circular shaft fixing part 21 that is narrowed one step further, and approximately in the center of both sides of this shaft fixing part 21 is integrally formed with both plug blades 3, 3. Support shafts 22, 22 are respectively protruded. Both support shafts 22, 22 of the blade block 4 are inserted into the shaft holes 15, 15 of the rotation fulcrum parts 13, 13 of the housings 1a, 1b via O-rings 23, 23, respectively, and the support shaft 22 is connected to a current-carrying metal fitting. 17 and is electrically connected. The support shaft 22 is inserted into the shaft hole 15, and the plug blade block 4 is rotatable.By hooking the hook part 34 of the protrusion of the plug blade block 4 with a finger, the plug blade block 4 is rotated and the plug is removed. The blade 3 protrudes from the storage recess 5. The waterproof cover 6 allows the opening surface of the storage recess 5 to be opened and closed.
One end of the waterproof cover 6 is rotatably supported by a shaft 11 at a lower corner of the housing body 1,
At the other end, one end of a sliding cover opening/closing switch 8 provided above the opening surface of the storage recess 5 is locked, and the waterproof cover 6 is closed. The surface of the cover opening/closing switch 8 is wavy to make it easy to slide. Furthermore, a conductive O-ring 29 is attached to the other end of the waterproof cover 6 to provide a waterproof function and serve as one contact to form a contact portion 24 as a switch means shown in FIG. A contact 26 corresponding to this contact is embedded in the end of the partition wall 12. When the waterproof cover 6 is closed, both contacts 26 come into contact and are closed. At this time, the periphery of the opening surface of the storage recess 5 comes into close contact with the O-ring 29 and has a waterproof function. FIG. 3 shows a specific circuit diagram of the electric shaver of this embodiment, in which the primary side of the transformer T is connected to the plug blades 3, the secondary side is connected in parallel with the battery 2, and the winding of the secondary side is connected to the plug blade 3. A series circuit is formed between the contact portion 24, the operating switch 9, and the motor M as a load. 35 is a diode, and this diode 35 prevents reverse flow of battery 2 current. By storing the plug blade block 4 in the storage recess 5 and closing the waterproof cover 6, the contact portion 2 is removed.
4 is closed, and the motor M is driven by closing the operation switch 9. When charging the battery 2, the waterproof cover 6 is opened and the plug blade 3 is connected to the AC power source e. At this time, the waterproof cover 6 is stored in a recess 7 provided on the lower side of the housing body 1. be done. The other end surface of the waterproof cover 6 is pressed against and fixed to the side wall surface of the recess 7.

Further, in order to use the electric shaver of this embodiment as a waterproof type, an O-ring 23 is disposed between the support shaft 22 and the rotating support part to make the current-carrying metal fitting 17 waterproof and rustproof. Even if the waterproof function of the O-ring 23 deteriorates due to wear, the intrusion of water into the charging circuit through the contact area between the support shaft 22 and the current-carrying metal fitting 17 is prevented by insert molding of the current-carrying metal fitting 17 and the housings 1a and 1b. do. Also, O-ring 27,2
8 is for preventing water from entering into the housing body 1, and O-ring 29 is for preventing water from entering into the housing body 1.
It is provided between the rim and the periphery of the opening surface of the storage recess 5 and has a waterproof function, and has the role of waterproofing and rustproofing the plug blade block 4. This O-ring 29 is a conductive O-ring, and the contact described above is formed by this O-ring 29 to form the contact portion 24 and perform the function described above. Therefore, even if the operating switch 9 is turned on with the waterproof cover 6 open when cleaning the electric razor with the blade 10 submerged in water, the O-ring 29 of the waterproof cover 6 and the contact 26 will not connect. Therefore, the motor M is not driven, which prevents water from entering the blade block 4 due to forgetting to close the waterproof cover 6. Furthermore, when the waterproof cover 6 is opened to charge the battery 2, the circuit between the battery 2 and the motor M is cut off, so the motor M is not driven and it is safe. Since the waterproof cover 6 is press-fitted into the inside of the battery 7, the waterproof cover 6 does not get stuck during charging.

As described above, the present invention has a battery built into the housing main body, and a plug blade block whose base is pivotally supported and which has a plug blade connected to an AC power source to charge the battery is provided inside the housing main body. The blade is stored in a storage recess, and a waterproof cover is provided, one end of which is pivotally supported on the opening surface where the tip of the blade protrudes from the storage recess when the blade block is rotated, and this waterproof cover is stored. A conductive O-ring that prevents water from entering the storage recess when attached to the opening surface of the storage recess is attached to the waterproof cover, and the waterproof cover is placed over the opening surface of the storage recess. A contact point that comes into contact with the O-ring when the battery is installed is provided on the opening surface of the storage recess, and the O-ring and the contact constitute a switch means that gently disconnects the battery and the load circuit when the waterproof cover is opened. Therefore, when used in a washable electric shaver, etc., the motor of the electric shaver cannot be driven unless the waterproof cover is closed, that is, the switch means consisting of an O-ring and contacts is closed. First, it is possible to prevent an electric shaver or the like from being washed with water with the waterproof cover left open using the switch means, and it is therefore possible to prevent water from penetrating into the appliance and rusting the blade. Furthermore, the O-ring constituting the switch means was originally used to make the waterproof cover waterproof, and since this O-ring is used as a component of the switch means,
There is an advantage that the switch means can be provided without increasing the number of parts.

[Brief explanation of the drawing]

Figures 1a and b are perspective views of an electric shaver according to an embodiment of the present invention; perspective views of essential parts showing a state in which the waterproof cover is opened and the blades are protruded; Figures 2a and b are longitudinal cross-sections of the same essential parts. 3 is a specific circuit diagram of the same as above, 1 is the housing body, 2 is the battery, 3 is the plug blade, 4 is the plug blade block, 5 is the storage recess, 6 is the waterproof cover, 7 is a recess, 26 is a contact, 29 is an O-ring, and e is an AC power source.

Claims (1)

[Scope of Claims] 1. A housing in which a battery is built in the housing body, and a plug blade block whose base is pivotally supported and has a plug blade connected to an AC power source to charge the battery is provided in the housing body. The blade is stored in the recess, and when the blade block rotates, the tip of the blade protrudes from the storage recess.A waterproof cover is provided, one end of which is pivotally supported on the opening surface, and the waterproof cover is rotated freely when the blade block is rotated. Attach a conductive O-ring to the waterproof cover to prevent water from entering the storage recess when it is applied to the opening surface of the storage recess, and also apply the waterproof cover to the opening surface of the storage recess. A contact point that comes into contact with the O-ring when the battery is opened is provided on the opening surface of the storage recess, and the O-ring and the contact constitute a switch means that gently disconnects the battery and the load circuit when the waterproof cover is opened. A charger characterized by: 2. The charger according to claim 1, wherein a recess is formed in the housing body to accommodate the waterproof cover itself when the storage recess is opened.