JPH0525183Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an electric appliance with a plug, such as a rechargeable electric shaver, which has a built-in plug for charging.

[Conventional technology]

5 and 6 show a conventional example. In FIG. 5, 1 is a main body case of an electric shaver, which has a printed circuit board 2 built therein. This board 2
Various electrical components 3 necessary for charging such as a transformer, a resistor, and a diode are attached to the battery, and a storage battery 4 is also attached to the battery. A plug 5 is built in, for example, at the bottom of the main body case 1. The plug 5 is formed by embedding one end of a pair of plug blades 6 in an insulating base 7. A plug knob 9 biased downward by a spring 8 is attached to the insulating base 7, and the plug knob 9 is attached to the main body case 1.
The pair of plug blades 6 are moved from the outside of the body case 1 along the guide groove 1a on the bottom surface of the main body case 1 in the left and right direction (that is, in the length direction of the plug blades 6). It is designed to be exposed and retracted through a provided through hole (not shown).

A synthetic resin partition 10 is provided in the main body case 1 to separate the printed circuit board 2 and the plug 5.
is built-in. As shown in FIG. 6, a pair of contact pieces 11 are attached to the partition 10 by heat caulking, that is, fitting holes provided in the contact pieces 11 into bosses protruding from the partition 10. It is attached by crushing the tip of the boss that is inserted through the matching hole while heating and softening it. Note that the heat caulking portion is shown at 12 in FIG. These pair of contact pieces 11
However, the plug blade contact portion 11a provided at one end thereof is adapted to be elastically maintained in contact with the pair of plug blades 6. Furthermore, one end of each lead wire 13 is connected to the other end of each contact piece 11 facing the notch 10a of the partition 10 by soldering 14. Further, the lead wire 13 is drawn out to the board storage space side of the main body case 1 through the notch 10a, as shown in FIG. 5, and is connected to the conductive pattern of the printed circuit board 2 by soldering.

In order to charge such a rechargeable electric shaver, the plug 5 is moved in the direction of the arrow in FIG. do. Then, the plug blade 6 passes through the contact piece 11, and then the lead wire 13 is passed through the printed circuit board 2.
Electric power supplied to the storage battery 4 is converted into direct current by the charging electric component 3 and supplied to the storage battery 4, and is thus charged.

[Problem that the invention attempts to solve]

By the way, in the past, the printed circuit board 2 was
The electrical connection between the contact piece 11 and the lead wire 13
Since the configuration is such that two lead wires 13 are required, manual work is required to connect these and the contact piece 11 using solder 14, and this work requires In addition to being time-consuming, there was also the risk of making mistakes in soldering connections. Moreover, during the connection work using the solder 14, the heat of the soldering iron is diffused to the contact piece 11, but the contact piece 11 has good thermal conductivity, and the solder 14 and the thermally caulked part 1
2, there was a risk that the thermally caulked portion 12 would loosen due to heating.

Therefore, an object of the present invention is to provide an electrical device with a plug that simplifies the structure and work of electrical connection between a printed circuit board and a contact piece, and eliminates the risk of the heat-sealed state of the contact piece loosening. Our goal is to provide the following.

[Means for solving problems]

Therefore, the present invention provides a pair of contact piece passing portions in a partition provided to separate the plug built into the main body case and the printed circuit board, with positions shifted in the direction of movement of the plug, and the partition a pair of joints attached by heat staking to the
A piece having an L-shaped lead piece bent at a substantially right angle to the partition direction is used on the side opposite to the plug blade contact portion. Then, the portions of the lead pieces of these contact pieces on the side of the plug blade contact portion are passed through the pair of contact piece passing portions respectively, and the pair of contact pieces are attached to the partition, and the lead pieces are attached to the printed circuit board. Connect directly to the conductive pattern using solder.

[Effect]

In the present invention, the contact piece has an L-shaped lead piece, and by passing this lead piece through the contact piece passing portion, the plug blade contact portion of the contact piece is placed on the surface of the partition facing the plug. Despite being placed in
A lead piece of the contact piece can be arranged on the side of the partition facing the printed circuit board. Since this lead piece is soldered directly to the printed circuit board, the contact piece can be electrically connected directly to the printed circuit board without going through the lead wire. Soldering between contact pieces can be omitted. Furthermore, by shifting the position of the lead wire passing portions, the lead pieces of the pair of contact pieces do not overlap, and the lead pieces that are directly connected to the printed circuit board can be kept at a predetermined insulation distance. Can be placed.
Furthermore, although the lead piece and the printed circuit board are soldered, the soldering position and the position of the heat caulking part that fixed the contact piece to the partition are largely separated by the lead piece, so when soldering heat can be quickly dissipated from the lead piece, and therefore, heat transfer to the heat crimped part can be reduced.

〔Example〕

An embodiment of the present invention will be described with reference to FIGS. 1 to 4. Parts similar to those of the conventional structure explained using FIGS. 5 and 6 are designated by the same reference numerals. The explanation thereof will be omitted, and different configurations will be explained below.

As shown in FIGS. 2 and 3, the partition 10 is provided with a pair of contact piece passing portions 21 and 22 that are shifted in position in the direction of movement of the plug 5. As shown in FIGS. These through parts 21 and 22 are holes in this embodiment, but
Instead of this, it may be formed with a notched groove. The amount of deviation A (see FIG. 3) between each of the through parts 21 and 22 is determined to be such that an insulation distance specified by various laws and regulations can be secured between lead pieces 25, which will be described later.

A pair of contact pieces 23 made of metal plate springs attached to the partition 10 have a plug blade contact portion 23a integrally attached to one end of a fixing portion 24 having a fitting hole 24a, as shown in FIGS. 2 to 4. In addition to extending the
An L-shaped lead piece 25 is provided at the other end of the fixed part 24.
It is formed by integrally extending. Lead piece 25
is bent toward the direction of the partition 10 at a substantially right angle to the fixing portion 24 . Moreover, lead piece 25
A notch 25a is provided in the middle part of.

The contact piece 23 having such a structure has its lead piece 2
The plug blade contact portion side portion 25b of No. 5 is passed through the contact piece passing portion 21 or 22, and
It is attached to the partition 10 by. The attachment of the contact piece 23 is carried out as follows. First, put the contact piece 23 in a position as shown in FIG.
2, and then rotate the entire contact piece 10 by 90° in the direction of arrow C in FIG. Thereby, the fitting hole 24a of the contact piece 23 is fitted into the boss portion 10b for heat staking shown in FIG. Next, the boss part 10
A heat caulking jig is pressed against b, thereby forming a heat caulking portion 12.

The contact piece 23 attached in this way is attached to the first
As shown in the figure and FIG. 2, the fixing part 24 and the plug blade contact part 23a are arranged on the surface of the partition 10 facing the plug 5, and the lead piece 25 is arranged on the surface of the partition 10 facing the printed circuit board 2. The lead piece 25 is provided at a substantially right angle to the partition 10.

Moreover, in this embodiment, the pair of contact pieces 23 are molded using the same mold, but the lead piece 25 of the contact piece 23 that passes through the contact piece passage portion 21 on the side closer to the printed circuit board 2 is used by cutting off the tip of the notch 25a, thereby making the protruding lengths D (see FIG. 2) of both lead pieces 25 from the partition 10 equal. Note that the notch 25a is used as a guide for the above-mentioned cutting. Furthermore, an insulating projecting wall 26 is integrally provided on the partition 10 and is located between each lead piece 25 . This projecting wall 26 may be omitted.

The tip of each lead piece 25 is engaged with a connecting groove 27 (see FIG. 2) provided at the edge of the printed circuit board 2 on the partition 10 side. These connection grooves 27
A part of a conductive pattern (not shown) of the printed circuit board 2 is located at the edge of the lead piece 25, and this pattern and the tip of the lead piece 25 are connected by solder (not shown).

According to the electrical connection structure between the contact piece 23 and the printed circuit board 2 as described above, a pair of contact pieces 23 having an L-shaped lead piece 25 are used, and the lead piece 25 is Contact piece passing portions 21, 2 of partition 10
By penetrating each of the partitions 10 and 2 separately, the partition 10
Although the plug blade contact portion 23a of the contact piece 23 is arranged on the surface facing the plug 5, the lead piece 25 of the contact piece 23 can be arranged on the surface of the partition 10 facing the printed circuit board 2. Moreover, these lead pieces 25
Since the positions of the lead wire passage parts 21 and 22 through which the plug 5 passes are shifted along the moving direction of the plug 5,
The pair of lead pieces 25 do not overlap and can be arranged with a predetermined insulation distance maintained. Then, since each lead piece 25 was fitted into the connection groove 26 of the printed circuit board 2 and soldered, the contact piece 23 and the printed circuit board 2
can be directly electrically connected.

Therefore, due to such direct connection, there is no need to use lead wires for electrical connection between the contact pieces 23 and the printed circuit board 2, so the number of parts can be reduced, and the number of parts can be reduced. The troublesome effort of soldering lead wires to each of contact pieces 23 can be omitted, thereby reducing manufacturing costs.
3 and the printed circuit board 2 can be increased in reliability.

Further, although the lead piece 25 and the printed circuit board 2 are soldered, the soldering position and the position of the heat caulking part 12 where the contact piece 23 is fixed to the partition 10 are separated by a large distance from the lead piece 25. It will be done. Therefore, heat during soldering can be quickly radiated from the lead piece 25, and therefore, heat transfer to the thermally caulked portion 12 can be reduced. In particular, since the contact piece 23 that passes through the contact piece passing portion 22 has a notch 25a, the thermal resistance in this portion increases and heat conduction can be suppressed, so that the heat transfer to the heat caulking portion 12 is further suppressed. You can do less. Therefore, it is possible to prevent the heat caulking portion 12 from softening due to heat transfer and loosening the attachment of the contact piece 23.

In addition, in the present invention, it is acceptable to use a pair of contact pieces that differ only in the length of their fixing parts, and the present invention is applicable to electrical devices with plugs other than the above-mentioned rechargeable electric shaver with a built-in plug. Of course it can be done.

[Effect of idea]

As explained above, in the present invention, L is attached to a pair of contact pieces.
While bending and forming the letter-shaped lead pieces, pass each lead piece through a pair of contact piece passages provided at different positions in the partition, and while ensuring the necessary insulation distance between these lead pieces. Since it is configured to be electrically connected directly to the printed circuit board without using lead wires, the structure and work of the electrical connection between the printed circuit board and the contact piece can be simplified, and the heat crimping condition of the contact piece can be simplified. This has the practical effect of preventing the risk of loosening.

[Brief explanation of the drawing]

1 to 4 show an embodiment of the present invention,
Fig. 1 is a longitudinal sectional view of the lower part of the electric shaver, Fig. 2 is a perspective view showing the partition to which the contacts are attached and the printed circuit board separated, and Fig. 3 is a separated view of the partition and some of the contacts. FIG. 4 is a perspective view of the contact piece. 5 and 6 show conventional examples;
The figure is a longitudinal sectional view of the lower part of the electric shaver, and FIG. 6 is a perspective view of the partition to which the contact piece is attached. 2...Printed circuit board, 1...Main case, 6...
...Plug blade, 7...Insulation base, 5...Plug, 1
0... Partition, 12... Heat caulking part, 23... Contact piece, 21, 22... Contact piece passing part, 23a... Plug blade contact part, 25... Lead piece.

Claims (1)

[Claim for Utility Model Registration] The above-mentioned utility model is formed by embedding a main body case with a built-in printed circuit board and one end of a pair of plug blades in an insulating base, and is movable along the length direction of the plug blades. a plug that is built into the main body case and has the plug blade retracted from and into the main body case; a partition built into the main body case that separates the plug from the printed circuit board; In an electric device with a plug, which is attached by heat caulking and includes a pair of contact pieces that elastically contact the plug blade, the pair of contact piece passing portions are shifted in position in the direction of movement of the plug, and the partition is removed. In addition, the pair of contact pieces are provided with an L-shaped lead piece bent at a substantially right angle to the partition direction on the opposite side of the plug blade contact portion, and the lead pieces of these contact pieces are Pass the plug blade contact side parts separately through the pair of contact piece passing parts, attach the pair of contact pieces to the partition, and directly solder the lead piece to the conductive pattern of the printed circuit board. Electrical equipment with a plug, characterized in that it is connected.