JPH0132682Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] This invention relates to electric shavers, portable lamps, and other small electric appliances that have built-in batteries.

[Conventional technology]

This type of small electric equipment is, for example,
As shown in Publication No. 108571, etc., the battery case has a cylindrical battery case that also serves as a grip, and the bottom opening of the battery case can be opened and closed with a battery cover, so that batteries can be taken in and out from this part. . The battery cover can be attached and detached by screwing means.

In addition, instead of the conventional screw-in method for attaching and detaching the battery cover, the battery cover is equipped with a pair of locking claws that can swing freely. There is one that is designed to be detachable (documents unknown).

[Problem that the invention attempts to solve]

However, with the former screw-in battery lid described above, the lid must be rotated when the battery lid is attached or removed, which is cumbersome. Further, the screw-in type has the disadvantage that it can only be applied to cylindrical battery cases with a circular cross section, and cannot be used at all to battery cases having an elliptical or polygonal cylindrical shape.

On this point, a battery cover with a locking claw like the latter mentioned above has the advantage that it can be attached and detached with a single touch, and can be applied regardless of the cross-sectional shape of the battery case. Since it has a structure in which a swingable lock piece is integrally formed, it is difficult to make it waterproof.

This invention focuses on this fact and aims to make it possible to attach and detach the battery cover with a one-touch operation regardless of the cross-sectional shape of the battery case, and to ensure waterproofness.

[Means for solving problems]

In order to achieve the above purpose, this invention
As shown in the figure, a battery cover 8 for opening and closing a bottom opening 7 of a battery case 1 of an electric shaver or other small electric appliance has a double-cover structure, with an inner and outer cover. The inner lid 9 is
It is removably inserted into the bottom opening 7 of the battery case 1 via a waterproof gasket 14 and formed into a dish shape capable of receiving the battery 5, and an electrode terminal plate 11 is attached to the inner bottom surface that receives the battery 5. At the same time, a packing presser stepped portion 13 is provided on the outer periphery of the mouth edge that is fitted inside the bottom opening 7. The outer cover 10 has a pair of lock pieces 19 which are fitted onto and connected to the outer bottom of the inner cover 9.
is provided so as to be able to swing in and out of the lid using the hinge part 18 as a fulcrum, and has a pressing part 22 on the swinging tip side of the hinge part 18 and an engaging pawl 20 on the swinging tip side of the hinge part 18, respectively. By swinging the lock piece 19, an engaging claw 20 is formed in an engaging recess 21 provided on the outer surface of the battery case 1.
The system is designed to be attached to and detached from the government.

[Effect]

In such a case, the inner cover 9 not only has the function of receiving and supporting the battery 5, but also has the function of waterproof sealing the bottom opening 7 of the battery case 1. By engaging the engaging claw 20 with the outer surface of the bottom opening 7 of the battery case 1, the above-described waterproof function of the inner cover 9 is reliably maintained. In other words, the waterproof function of the battery cover 8 and the function of securing it to the battery case 1 are shared by the inner cover 9 and the outer cover 10, respectively.

[Effect of idea]

According to the present invention as described above, the inner and outer covers 9 and 10 can be easily and quickly attached and detached by a one-touch operation of swinging the pair of locking pieces 19, and the inner cover 9 can be attached and removed from the battery case 1. By forming the battery case 1 into a shape that matches the cross-sectional shape of the battery case 1, it can be applied to a battery case 1 having any cross-sectional shape, and has great versatility.

Particularly, in the present invention, by making the inner cover 9 share the waterproof function and the outer cover 10 share the locking function, it is possible to obtain a battery cover with extremely excellent waterproof properties.

〔Example〕

Hereinafter, a case will be described in which an embodiment of this invention is applied to a water-washable electric shaver.

This electric shaver consists of a cylindrical battery case 1 that also serves as a grip, and a spherical head 4 having inner and outer blades 2 and 3 connected to it, and a battery 5 built into the battery case 1.
The motor 6 is driven by the motor 6, and the inner cutter 2 is rotated by the motor output.

The battery case 1 contains two AA batteries 5 in an upright position.
5 is formed into an elliptical cross-section so that it can be compactly accommodated side by side, and its bottom opening 7 is connected to the battery cover 8.
It is closed and can be opened and closed freely.

The battery cover 8 is made of plastic with double inner and outer covers 9 and 1.
0, the inner lid 9 is formed into an oval deep dish shape that approximately matches the inner peripheral shape of the battery case 1, and is placed on a flat inner bottom surface that receives the terminal side ends of the batteries 5. Attach the electrode terminal plate 11 that connects the batteries 5 in series. The electrode terminal plate 11 is formed by pressing a single conductive elastic plate. The outer periphery of the elliptical edge 12 of the inner cover 9, which is removably inserted into the bottom opening 7 of the battery case 1, has a stepped portion that abuts the edge 7a of the bottom opening 7 from below. 13 is formed in an overhanging manner. When the inner lid 9 is fitted into the bottom opening 7, the stepped portion 13 has a ring-shaped waterproof packing 14 in a fitted state, and the packing 14 is attached to the inner periphery of the edge 7a of the bottom opening 7. It is pressed against the formed step portion 15.

The outer cover 10 is formed into a deep oval dish shape that matches the outer diameter of the battery case 1 and is large enough to cover the entire inner cover 9. This outer cover 10 has the outer bottom surface of the inner cover 9 superimposed on the flat inner bottom surface, and a caulking pin 16 protruding from the outer bottom surface of the inner cover 9 is attached to the outer cover 1.
It is inserted into the hole 17 provided at the bottom of the case 0 and crimped to be integrally connected to the inner cover 9.

On both sides of the outer lid 10, a lock piece 19 is formed in the shape of a notch, which can swing in and out of the lid using the elasticity of the integrally molded hinge part 18 as a fulcrum. The engagement claw 20 formed on the inner surface of the upper swinging tip is engaged with the engagement recess 21 formed on the outer surface of the battery case 1, thereby preventing the inner cover 9 from being pulled out from the bottom opening 7. As a result, the waterproof sealed state of the bottom opening 7 is maintained. and,
The locking state is released by pushing the pressing part 22 formed on the swing base end side below the hinge part 18 of the locking piece 19 into the lid. It can be pulled out from below. Note that a space S is formed between the side wall portion of the inner lid 9 and the locking piece 19 of the outer lid 10 opposing thereto to allow the locking piece 19 to be pushed and swung. Further, a leaf spring 23 is interposed between the bottoms of the inner lid 9 and the outer lid 10, and the leaf spring 23
By elastically abutting the upright portions 23a, 23a at both ends of the lock piece 19 on the lower inner surface side of the lock piece 19, the lock piece 19
By making elastic contact with the inner surface of the lower part of the lock piece 1
9 is biased in the locking direction. Further, even if water enters the inside of the outer cover 19 from the lock piece 19 when washing with water, it can be drained from a drain hole 24 provided at the bottom.

[Brief explanation of the drawing]

The drawings show an electric shaver which is an example of a small electric device according to the present invention, in which FIG. 1 is a sectional view taken along the line A-A in FIG. 3, FIG. 2 is a side view, and FIG. 3 is a longitudinal side view. FIG. 4 is an enlarged sectional view taken along the line B--B in FIG. 2. 1...Battery case, 5...Battery, 7...Bottom opening, 8...Battery cover, 9...Inner cover, 10...Outer cover,
DESCRIPTION OF SYMBOLS 11... Electrode terminal board, 13... Packing press step part, 14... Packing, 18... Hinge part, 19
... Lock piece, 20 ... Engagement pawl, 21 ... Engagement recess, 22 ... Pressing part.

Claims (1)

[Scope of utility model registration request] A small electric device having a battery case 1,
A battery lid 8 for opening and closing the bottom opening 7 of the battery case 1 is removably inserted into the bottom opening 7 via a waterproof packing 14, and an inner lid 9 is formed in a dish shape to receive the battery 5; An outer cover 10 is fitted onto the inner cover 9, and an electrode terminal plate 11 is provided on the inner bottom surface of the inner cover 9 to receive the battery 5. A seal presser stepped portion 13 is provided on the outer periphery of the mouth edge, and a pair of lock pieces 19 are provided on both sides of the outer lid 10 so as to be able to swing in and out of the lid using a hinge portion 18 as a fulcrum. A pressing portion 22 is located closer to the swinging base end than the portion 18 and is located on the hinge 1
An engaging pawl 20 is provided on the swinging tip side of the battery case 1 so that the engaging pawl 20 engages and disengages from an engaging recess 21 provided on the outer surface of the battery case 1 by the rocking of the lock piece 19. A small electrical device characterized by: