JPH0441575Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a charger that is detachably connected to a water-washable electric shaver and charges a storage battery within the electric shaver.

(Problems to be solved by conventional technology and ideas) As a charger for a water-washable electric shaver, it is difficult to prevent water from entering through the penetration part of the terminal fitting that penetrates the body case that houses the charging parts. In order to cope with this problem, a structure is known in which an age-hardening sealing material is filled in the container case.

However, this conventional charger has problems in that it is heavy and the charging parts cannot be repaired and inspected after assembly. Since it is not possible to completely eliminate defects and pinholes, there is also the problem that the reliability of waterproofing is poor.

In addition, for ordinary electric razor chargers that cannot be washed with water, the charging parts are attached to a printed wiring board, a so-called PC board, to make it easier to incorporate the charging parts into the body case. There is something. The electrical connection between the charging unit and the terminal fitting is made by attaching a metal contact terminal plate to the terminal fitting and elastically bringing this terminal plate into contact with the PC board to obtain the necessary contact pressure. It's summery.

However, in this conventional charger, an abnormal force is applied to the contact terminal plate through the charging unit due to an impact when the charger is dropped after assembly, causing the contact terminal plate to deform beyond its elastic limit. This may cause poor contact (poor continuity) between the PC board and the contact terminal board.

[Means for solving problems]

In order to solve the above problems, this invention
A unit support integrally protrudes from the inner surface of the resin case that houses the charging unit, which is made by directly attaching charging parts to the PC board, and the opening of the case is closed by sandwiching the packing. The charging unit is sandwiched and fixed between the case lid, and a terminal fitting penetrating through this wall is attached by molding to the wall portion of the device case from which the unit support protrudes, and the terminal fitting is attached to the wall portion of the device case from which the unit support protrudes. A contact terminal plate that elastically contacts the PC board is connected to a part inside the body case, and a connecting terminal is connected to a part of the terminal fitting outside the body case, and a contact terminal plate is connected to a part of the terminal fitting outside the body case. is formed by integrally protruding protrusions that closely oppose the back surface of the contact terminal plate.

[Effect]

According to this charger for a water-washable electric shaver, the terminal fitting that is provided through the case is attached by molding to the device case that houses the charging unit, so a special seal is created at the terminal fitting penetration part. There is no need to install any material, and water ingress from this area can be reliably prevented. At the same time, since packing is sandwiched between the vessel case and the case lid to form a seal, it is possible to reliably prevent water from seeping in from this area. Therefore, there is no risk of water entering the body case, making it suitable for use in water-washable electric shavers.

In addition to such a waterproofing means, since the charging unit is sandwiched and fixed between the unit support of the container case and the case lid, there is no need to fill it with a sealant as in the conventional case. Therefore, the charger can be made lightweight, and the charging parts can be repaired and inspected if necessary.

In addition, since no sealing material is filled inside the device case, this does not prevent the charging unit from moving slightly if it is subjected to impact due to a fall, etc. However, the contact terminal board, which is subject to the movement of the PC board, cannot be prevented. By being supported by a protrusion provided close to the back surface of this plate, further deflection is regulated. Therefore, it is possible to prevent the contact terminal plate from being permanently deformed beyond its elastic limit, thereby preventing poor conduction between the charging unit and the terminal contact plate.

〔Example〕

The drawings show an embodiment of the invention.

In the figure, reference numeral 1 denotes a container case made of resin, one side of which is open, and an annular stepped portion 2 is formed in this open side. Two sets of terminal fittings 4 and 5 (positive electrode side, negative electrode side) are penetrated through the wall portion 3 of the container case 1 on the side opposite to the opening surface. Each of the terminal fittings 4 and 5 is set in a mold of the container case 1 and fixed to the container case 1 as the container case 1 is injection molded. ing.

Contact terminal plates 6, 7 made of elastic metal plates are provided at the parts of the terminal fittings 4, 5 inside the body case 1.
is connected. Note that this connection is made by soldering, caulking, or the like. Along with this, connection terminals 8 and 9 are connected to the parts of the terminal fittings 4 and 5 outside the container case 1, respectively. Note that, for example, in the case shown in the figure, this connection is made using connection terminals 8 and 9.
Parts of the terminal fittings 4 and 5 are press-fitted separately, and the other parts are individually fitted to the stopper protrusions on the wall 3, and then these protrusions are melted and crushed. In Figure 1, numeral 10 is a melt stopper. The connection terminal 8 has a cylindrical part into which the charging terminal pin B of the washable electric shaver A is inserted and connected, and the connection terminal 9 has a plug contact part exposed on the side surface of the body case 1. .

Unit supports 11 and 12 are integrally provided on the inner surface of the wall portion 3 to surround the contact terminal plates 6 and 7, respectively, and an auxiliary unit support 13 is integrally provided on the periphery of the inner surface. Furthermore, protrusions 14 are integrally provided on the inner surface of the wall portion 3 and protrude closely from the back surfaces of the contact terminal plates 6 and 7, respectively.

A case lid 15 that closes the opening surface of the container case 1 is attached to the container case 1 with screws 17, with a packing 16 positioned on the step 2 sandwiched therebetween. Note that 18 in FIG. 3 is a screw receiving hole. Also, inside the device case 1 is a charging unit 21 which is made up of a PC board (that is, a printed internal wiring board) 19 and a transformer 20 and other charging parts attached directly to it.
is built-in. This unit 21 is sandwiched and fixed between the unit supports 11 and 12 and the case lid 15, and in this built-in state, the PC board 1
Contact terminal plates 6 and 7 are in elastic contact with conductive patterns 9 (not shown).

A case cover 22 made of resin is adhered to the outer surface of the wall portion 3 of the container case 1. This cover 22
is a charging pin socket part 23 that covers the cylindrical part of the contact terminal 8 and also serves to position the electric shaver A;
and a convex portion 24 for positioning the electric shaver A,
25 and a charging plug cover part 26. A charging plug 27 is provided inside this cover portion 26.
is attached so that it can be rotated about a pivot shaft 28 to raise and lower the shaft, and its plug blade 27a is adapted to be articulated and rotated in contact with the connection terminal 9.

To charge the storage battery in electric shaver A using this charger, first fit electric shaver A and the charger together and connect them, then raise the charging plug 27 and plug this plug 27 into an outlet. Just plug it in.

In addition, even if water comes into contact with the charger and enters the case cover 22, such as when the outer surface of the electric shaver A is wet during charging, the contact terminals 4,
The packing 16 prevents water from entering the container case 1 through the penetration part 5, and also prevents water droplets running along the outer surface of the container case 1 from entering the container case 1 from the case lid 15 side. Therefore,
This charger does not require filling the container case 1 with a sealing material to make it waterproof, unlike the conventional charger. Therefore, it can be made lightweight, and since the case lid 15 is removable, the charging parts can be repaired and inspected.

Furthermore, if this charger is accidentally dropped or receives an external impact, the charging unit 21
As the contact terminal plate 6 or 7 moves slightly, the contact terminal plate 6 or 7 is further elastically deformed by the PC board 19.
Since the deflection is restricted at the time of contact with the protrusion 14, the deflection is within the elastic limit. This prevents the contact terminal plate 6 or 7 from being permanently deformed so as to approach the wall 3, resulting in weak contact pressure with the conductive pattern on the PC board 19, or from separating from the conductive pattern. can.

In the above embodiment, the charging plug is directly attached, but the charging plug and the connecting terminal 7 may be connected via a cord. Furthermore, by making the unit support into a square frame shape and cutting out a part of it so as to lower it one step, the remaining low part may be used as a protruding part. In this case, the width of the cutout can be adjusted to By making it substantially the same as the terminal board, it can be used for positioning the contact terminal board. In addition, when implementing the present invention, unless it is contrary to the gist of the invention, the device case, case lid, packing, unit support, charging unit, terminal fittings, contact terminal board,
It goes without saying that the specific structures, shapes, positions, materials, etc. of the connection terminals, protrusions, etc. are not limited to the one embodiment described above, and can be configured and implemented in various ways.

[Effect of idea]

The present invention, the gist of which is the configuration described in the claims for utility model registration, includes the following steps:
Because the packing is sandwiched between the body case and the case lid, there is no need to fill the body case with sealant, and water can be reliably prevented from entering the body case, making it ideal for water-washable electric shavers. In addition to being suitable as a battery, it is also lightweight, and the charging parts can be maintained and inspected after assembly. Moreover, despite the fact that the charging unit does not fill the case with a sealing material and the charging unit moves slightly within the case when it is dropped, the protrusion prevents deformation of the contact terminal plate. It can prevent poor contact between the terminal board and the PC board.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, and FIG.
2 is a plan view, and FIG. 3 is a bottom view of the container case. 1... Apparatus case, 3... Wall, 4, 5... Terminal fitting, 6, 7... Contact terminal plate, 8, 9... Connection terminal, 11, 12... Unit support, 14... Protrusion Part, 15... Case lid, 16... Packing,
17...screw, 19...PC board, 20...charging parts (transformer), 21...charging unit.

Claims (1)

[Scope of utility model registration request] In chargers for washable electric razors,
A unit support integrally protrudes from the inner surface of the resin case that houses the charging unit, which is made by directly attaching charging parts to the PC board, and the opening of the case is closed by sandwiching the packing. The charging unit is sandwiched and fixed between the case lid, and a terminal fitting penetrating through this wall is attached by molding to the wall portion of the device case from which the unit support protrudes, and the terminal fitting of the terminal fitting is attached to the wall portion from which the unit support protrudes. A contact terminal plate that elastically contacts the PC board is connected to a part inside the body case, and a connecting terminal is connected to a part of the terminal fitting outside the body case, and a contact terminal plate is connected to a part of the terminal fitting outside the body case, and The charger is characterized in that a protruding portion is integrally provided on the back surface of the contact terminal plate and is closely opposed to the contact terminal plate.