JPH0317416Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention is a plug device for an electrical appliance, which is equipped with a plug having a plug blade that can be taken in and out of the electrical appliance body.

[Conventional technology]

A plug device for a conventional electric appliance such as a rechargeable electric shaver is shown in FIG.
The main body of the instrument, indicated by 1 in the figure, is constructed by combining a pair of cases 2 made of synthetic resin. A long and thin guide hole 4 is formed in the bottom wall 3 (i.e., the outer plug guide wall) of the main body 1, and a synthetic resin partition plate is provided inside the main body 1, facing substantially parallel to the bottom wall 3. 5 (i.e. an inner plug guide wall). A plug 6 is provided between the partition plate 5 and the bottom wall 3 so as to be movable along the guide hole 4. The plug 6 has a pair of plug blades 7, 7, and these blades are attached to the main body by reciprocating the plug 6.
The plug can be taken in and taken out from the plug blade passage hole 8. Furthermore, a plug blade contact piece 9 made of a metal leaf spring that forms a charging circuit is attached to the partition plate 5, and this contact piece 9 is always pressed against the plug blades 7 by its own spring force. ing.

[Problem that the invention attempts to solve]

However, in this conventional plug device for electrical appliances, the plug blade contact piece 9 is always brought into pressure contact with the plug blade using only its own spring force. There is a risk that sufficient pressure contact with the plug blade 7 may be impaired. When such a situation occurs, there is a problem that heat generation and a charging failure phenomenon may occur due to an increase in contact resistance.

[Means for solving problems]

In order to solve the above problems and enable smooth insertion and removal of the plug, the present invention
A plug blade passage hole is provided in an electric appliance body having a plug guide wall having an elongated guide hole and a lock groove intersecting with the plug blade passage hole, and the plug blade is inserted into and taken out through the plug blade passage hole. A plug having a locking protrusion that is engaged and detached from the groove is built into the electrical appliance main body so as to be movable along the plug guide wall, and the plug is placed in between so as to be substantially parallel to the plug guide wall. In a plug device for an electric appliance, a partition plate is built into the electric appliance main body, and a plug blade contact piece made of a metal plate spring is attached to the partition plate, which is always pressed against the plug blade,
The partition plate is made of elastic synthetic resin, and a push spring is provided on the partition plate to contact the contact portion of the plug blade contact piece with the plug blade and press the plug blade contact piece in the direction of the plug blade. a spring portion that contacts the partition plate and presses the base against the plug guide wall; Further, the base is provided with a knob that is located between the contact portion and the contact portion of the spring portion to the partition plate and passes through the guide hole.

[Effect]

According to this plug device for an electric appliance, the partition plate is made of elastic synthetic resin, and the partition plate has the following features:
Since the push spring part is integrally provided, this push spring part can push the plug blade contact piece toward the plug blade, and the spring force of the push spring part and the spring force of the plug blade contact piece themselves are used to push the plug. The blade contact piece can be brought into sufficient pressure contact with the plug blade. Therefore, it is possible to prevent the plug blade contact piece from weakening even after long-term use, and to prevent heat generation and charging failure due to an increase in contact resistance. Furthermore, since the push spring portion is integrally provided with the partition plate, there is no need to add another component to prevent the plug blade contact piece from becoming sagging, thereby increasing the number of components. Furthermore, when the plug is unlocked by pushing the plug knob toward the partition plate and the locking protrusion is removed from the lock groove, the plug can be prevented from tilting when the plug is moved together with the knob. That is,
Since the knob is located between the contact portion of the plug blade contact piece biased by the push spring portion with the plug blade and the contact portion of the spring portion with the partition plate, the partition plate of the knob is The pushing force in the direction is received by both of the contact portions, and the entire plug is supported at these two points, thereby preventing the plug from tilting. Therefore, since the plug is not moved diagonally, the plug can be smoothly moved along the plug guide wall and the plug blade can be taken in and out of the plug blade passage hole.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 and 2.

In the figure, 11 is a pair of synthetic resin cases 1, for example.
2, the bottom wall 1 serves as a plug guide wall of the main body 11.
3 has a long and thin guide hole 14 formed therein. Inside the main body 11, a partition plate 15 made of elastic synthetic resin such as polyacetal resin is supported by support portions 16 and 17 provided on the inner wall of the main body 11 in a manner substantially parallel to the bottom wall 13. A plug 18 is provided between the partition plate 15 and the bottom wall 13 so as to be movable along the guide hole 14.

The plug 18 has a pair of plug blades 19, 19.
A knob 21 is integrally formed at the substantially central lower part of a base 20 made of an elastic synthetic resin such as polyacetal resin in which one end is embedded, and a spring part 22 is integrally formed at the upper part. This spring part 2
2 has a contact portion 22a protruding in the direction of the partition plate 15 at its end, and this contact portion 22a is in contact with the partition plate 15 to keep the base 20 always on the bottom wall 1 of the main body 11.
It seems to be pushing towards 3. Also, pick 21
is a contact portion 3 with the plug blade 19 of a plug blade contact piece 31 (described later) that is biased by a push spring portion 35 (described later).
3, and the contact portion 2 of the spring portion 22 to the partition plate 15
2a. Moreover,
This knob 21 has a sliding portion 23 that penetrates the guide hole 14 and is movable along the guide hole 14, and a locking protrusion 24 on the base 20 side of the sliding portion 23. It has an integrated structure.

Further, in one side wall 12a of the main body 11, there is a plug blade passage hole 2 through which the plug blades 19, 19 are inserted and removed.
6 are provided respectively. Furthermore, the bottom wall 13
In the figure, locking grooves 27 and 28, which are substantially perpendicular to the guide hole 14 and in which the locking protrusion 24 of the plug 18 is engaged and disengaged, are provided.
The position of the locking protrusion 24 when the plug blade 19 of the plug 18 is protruded from the plug blade passage hole 26, and the position of the locking protrusion 2 when the plug blade 19 is recessed into the main body 11.
4, respectively.

The partition plate 15 is provided with a guide portion 30 on which the spring portion 22 of the plug 18 slides on a surface facing the guide hole 14 . Further, on both sides of the guide portion 30 of the partition plate 15, a pair of plug blade contact pieces 31 made of metal leaf springs forming a charging circuit melt and crush a protrusion 32 formed integrally protruding from the partition plate 15. They are installed respectively by. The contact piece 31 has a contact portion 33 having an arcuate cross section that presses into contact with the plug blade 19 of the plug 18 at one end, and a lead wire 34 forming a charging circuit is soldered to the other end. Further, the partition plate 15 is provided along each of the contact pieces 31, and these contact pieces 31 are connected to the plug 18.
A pair of pressing spring portions 35 are integrally provided to press toward the plug blade 19. The pressing portion 36 of the pressing spring portion 35 contacts the contact portion 33 of the plug blade contact piece 31 and urges the plug blade contact piece 31 in the direction of the plug blade 19.

In this configuration, the plug blade 19 of the plug 18
Even if the plug is taken in and out of the main body 11 and used for a long period of time, the push spring portion 35 integrated with the partition plate 15 presses the plug blade contact piece 31 in the direction of the plug blade 19, so that the plug blade contact piece 31 can be prevented from fading. Therefore, the contact piece 31 can be sufficiently strongly pressed against the plug blade 19 by its own spring force and the spring force of the push spring portion 35. For this reason, it is possible to prevent heat generation and charging failure due to an increase in contact resistance, and to maintain this state for a long period of time. Since the push spring portion 35 is integrally provided on the partition plate 15, the plug blade contact piece 3
There is no need to newly attach a separate part to the partition plate 15 or the like to prevent the parts from sagging, and the present invention can be implemented without increasing the number of parts. Further, when the plug 18 is unlocked by pushing the knob 21 of the plug 18 toward the partition plate 15 and removing the locking protrusion 24 from the locking groove 27 or 28, and moving the plug 18 together with the knob 21, the plug 18 can be moved. 18 can be prevented from tilting. That is, the knob 21 is connected to the contact portion 33 of the plug blade contact piece 31 with the plug blade 19 urged by the push spring portion 35 and the partition plate 1 of the spring portion 22.
5, the pushing force of the knob 21 in the direction of the partition plate 15 is received by both the contact parts 33 and 22a, and the entire plug 18 is supported at these two points. This prevents the plug 18 from tilting. Therefore, since the plug 18 is not moved diagonally, the plug 18 can be smoothly moved along the bottom wall 13 serving as a plug guide wall, and the plug blade 19 can be inserted into the plug blade passage hole 26. You can go in and out.

[Effect of idea]

According to the present invention, since the elastic synthetic resin partition plate is integrally provided with a push spring section, the push spring section presses the plug blade contact piece in the direction of the plug blade of the plug. It is possible to prevent the pieces from becoming sagging, and therefore, it is possible to prevent heat generation and charging failure due to an increase in contact resistance. Moreover, there is no need to increase the number of parts required to prevent the plug blade contact piece from weakening. In addition, at two points, the contact part of the plug blade contact piece with the plug blade biased by the push spring part, and the contact part of the spring part with the partition plate,
Since the pinching force applied to the plug can be supported between these two points and the plug can be prevented from tilting, the plug can be smoothly taken in and out along the plug guide wall.

[Brief explanation of the drawing]

FIGS. 1 and 2 show an embodiment of the present invention, with FIG. 1 being an exploded perspective view and FIG. 2 being a sectional view. FIG. 3 is a sectional view showing a conventional example. 11...Electrical appliance body, 15...Partition plate, 18
...Plug, 19...Plug blade, 31...Plug blade contact piece, 35...Press spring portion, 13...Bottom wall (plug guide wall), 22...Spring portion, 22a...Contact portion, 23... ...Sliding part, 24...Latching protrusion, 27,
28...Lock groove, 33...Contact part, 36...Press part.

Claims (1)

[Scope of Claim for Utility Model Registration] A plug blade passage hole is provided in the main body of an electric appliance, which is equipped with a plug guide wall having a long and thin guide hole and a locking groove intersecting with the plug guide hole, and the plug blade is inserted into and taken out through the plug blade passage hole. A plug having a plug blade and a locking protrusion that is engaged and detached from the lock groove is built into the electrical appliance main body so as to be movable along the plug guide wall, and the plug is placed between the plug and the lock groove. A plug device for an electrical appliance, in which a partition plate provided substantially parallel to the plug guide wall is built into the electrical appliance main body, and a plug blade contact piece made of a metal plate spring is attached to the partition plate, which is always pressed against the plug blade. In this step, the partition plate is formed of a synthetic resin having elasticity, and the plug blade contact piece is pressed against the partition plate in the direction of the plug blade in contact with the contact portion of the plug blade contact piece with the plug blade. A pressing spring portion is integrally provided, and a spring portion that contacts the partition plate and presses the base against the plug guide wall is integrally formed on the synthetic resin base in which one end of the plug blade is embedded. and a plug device for an electrical device, characterized in that the base is provided with a knob located between the contact portion and the contact portion of the spring portion to the partition plate and passing through the guide hole. .