JPH0512936Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The invention is formed by rotatably attaching a plug to the outer surface of a device case that houses charging parts, and can be attached to and detached from, for example, a washable electric shaver. This invention relates to a charger that can be used by connecting to a battery charger.

[Conventional technology]

In conventional chargers, the following two types of contact structures between the plug blade and the connection terminal attached to the device case are known. One is a structure in which the insulating base side end of the straight plug blade protrudes from the insulating base, and the extending part of the connection terminal comes into contact with the narrow end surface of the protruding end as a contact surface.
Another example, as shown in Japanese Utility Model Publication No. 48-36969, is to remove a part of the side of an insulating base in which a straight plug blade is embedded to expose the side of the plug blade. This is a structure in which the extending portions of the connecting terminals are brought into contact with each other.

[Problem that the invention attempts to solve]

However, in the former conventional example, the contact between the plug blade and the contact terminal is close to a line contact, and the contact area is small, so the influence of variations in the connection terminal and plug installation is large, and the contact tends to become unstable. The problem is that it is expensive.

In addition, in the latter conventional example, since a part of the side of the insulating base is removed, unless the plug is made larger, the part where the plug blade is embedded in the insulating base is reduced and the support strength is reduced. There is a problem that there is a risk of disassembly, and that the extension part is located so as to enter the side of the insulating base, making it difficult to assemble the whole assembly.

[Means for solving problems]

In order to solve the problems of the conventional technology described above without increasing the size of the plug, the charger of the present invention has a plug with one end of a pair of plug blades embedded in an insulating base, and a charging component. In a charger that is rotatably attached to one side of a built-in device case, the tip sides of the embedded portions of the pair of plug blades are bent toward the side toward each other to form a substantially L-shaped bent portion. , the inner surface of the L-shaped bent portion adjacent to the opposing side surfaces of the pair of plug blades is in contact with the insulating base, and the L-shaped bent portion is adjacent to the non-opposed side surfaces of the pair of plug blades. The outer surface of the insulating base is exposed on the outer circumferential surface along the rotating direction of the insulating base, and forms a surface contact portion with an extending portion of a connecting terminal attached to the container case.

[Effect]

According to this charger, the plug blade is not straight, but the tip on the embedded side is bent into an approximately L shape, and the connecting terminal is extended on the wide, flat exposed surface of this L-shaped bent portion. Since there is surface contact with the protruding part, contact between the plug blade and the connecting terminal can be ensured. Since the L-shaped bent portion is exposed on the outer surface of the insulating base on the opposite side from the insertion end of the plug blade,
There is no need to remove a part of the insulating base as in the conventional case, and since the L-shaped bent parts are bent toward each other, L-shaped bent parts can be formed on both sides between the opposing sides of the pair of plug blades. There is no need for an insulating base part for embedding the parts. For this reason,
The pair of plug blades can be firmly supported without increasing the size of the insulating base, and in particular, when removing the plug blade from an outlet etc., the L-shaped bent part and the insulating base catch on each other. It can support the tensile load acting on the blade. Furthermore, when the connecting terminal comes into contact with the L-shaped bent portion, it is not necessary to insert the extending portion of the terminal into the insulating base as in the conventional case, so that the overall assembly does not become difficult.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.

In the figure, 1 is a container case, which is formed by connecting case members 2, 3, and 4 made of synthetic resin.

The case member 2 has a box shape with one side open, and an annular step 5 is formed on the open side. On the outer surface of the wall portion 6 on the side opposite to the opening surface of the case member 2, there is, for example, an annular projecting wall 7 substantially along the outer periphery and a cross-shaped rib 8 for partitioning the inside of the wall 7 into four compartments A to D. are integrally protruded.
The protruding heights of these protruding walls 7 and ribs 8 are approximately the same. A pair of terminals 9, 1 on the primary side are provided on the wall 6.
A pair of terminals 11 and 12 on the zero and secondary sides are fixed through the terminal. The terminals 9 to 12 are specially arranged in the four compartments A to D, respectively, and an elastic metal contact terminal plate 13 is provided at the end of each of the terminals 9 to 12 protruding into the case member 2. is connected.

A contact terminal plate 13 is provided on the inner surface of the wall portion 6.
Unit support portions 14 are integrally protruded to surround the respective support portions, and an auxiliary unit support portion 14a having the same height as the support portions 14 is protruded from the periphery side. Also, inside the case member 2, a PC board 15 is provided.
A charging unit 17 having a transformer 16 and other charging parts directly attached thereto is built-in. This unit 17 is supported by the supporting parts 14, 14a, and the contact terminal plate 13 is in elastic contact with the conductive pattern (not shown) of the PC board 15.

Further, the case member 3 closes the opening surface of the case member 1, and inserts the waterproof gasket 18 positioned on the step portion 5 into the screw 1.
9 is connected to the case member 3. In this connected state, the case member 3 is connected to the charging unit 17.
is sandwiched between the support portions 14 and 14a.

Primary side connection terminals 20 are attached to the ends of the terminals 9 and 10 that protrude to the outside of the case member 2, and the ends of the terminals 11 and 12 that protrude to the outside of the case member 2 are respectively attached. Secondary side connection terminal 2
1 is installed.

These connection terminals 20 and 21 are provided in separate positions in each of the compartments A to D, respectively. In addition, the primary side connection terminal 20 is formed with an extension portion 20a that protrudes from the compartments A and B and is bent obliquely along one outer surface of the case member 2. Further, the secondary side connection terminal 21 has a pin contact portion 21a into which a charging terminal pin of a washable electric shaver (not shown) is inserted and connected.

On the other hand, the case member 4 is provided to cover the outer surface of the wall portion 6 of the case member 2, and is connected to the case member 2 by high-frequency heat welding using the contact surface with the annular protruding wall 7 and the rib 8 as a weld portion. ing. The case member 4 may be connected to the case member 2 by screwing.

The case members 2, 3, and 4 are provided with plug attachment portions 24, 25, and 26, respectively, which extend integrally outward from the side of the extension portion 20a. A plug attachment part 25 which is integral with the case member 3 is joined to one end surface of the plug attachment part 24 which is integral with the case member 2, and one of these mating surfaces has a recess and a groove. The other side is provided with a protrusion that enters and closes the opening on the mating surface side of the recess, and a bearing portion 27 is formed between these protrusions. Furthermore, a plug attachment portion 26 that is integral with the case member 4 and extends over these attachment portions 24 is joined to the other end surface of the plug attachment portion 24 that is integral with the case member 2 .

Further, 28 in FIGS. 1 to 4 is a plug to be inserted into an outlet, a table tap, etc. as appropriate, and this is formed by attaching a pair of plug blades 30 to an insulating base 29 made of synthetic resin. For example, shaft portions 31 are integrally protruded from both sides of the insulating base 29. The plug 28 has its shaft portion 31
is rotatably held by the bearing portion 27 and attached to the outer surface of one side of the container case 1 so as to be freely raised and folded.

The distal ends of the embedded portions inserted and fixed to the insulating base 29 of the plug blade 30 are bent toward the sides toward each other, forming a substantially L-shape. The inner surfaces of the L-shaped bent portion 30a adjacent to the opposing sides of the pair of plug blades 30 are bonded and hooked to the insulating base 29. moreover,
The outer surface adjacent to the non-opposed side surfaces of the pair of plug blades 30 in the L-shaped bent portion 30a is connected to the insulating base 29.
The exposed flat surface of the L-shaped bent portion 30a is exposed on the outer circumferential surface of the insulating base located on the opposite side to the insertion end of the plug blade 30 along the rotating direction, and the exposed flat surface of the L-shaped bent portion 30a is in contact with the extending portion 20a of the connecting terminal 20. We're starting to come into contact.

Furthermore, a protrusion 32 is integrally provided at the rear end of the insulating base 29, and an escape groove 33 is formed to allow the protrusion 32 to be elastically deformed. Along with this, a recess 34 is formed on the outer surface of one side of the case member 2, and a recess 34 into which the projection 32 is engaged and disengaged is formed, and a recess 35 into which the projection 32 is engaged and disengaged is also formed in the plug mounting portion 26. . The recess 35 is formed by a groove or a hole, and has a curved engagement surface 36 that substantially follows the rotation locus of the projection 32 .

To charge the storage battery in the electric shaver using the charger with the above structure, first rotate the plug 28 in the direction of arrow H from the state shown in FIG. It is engaged and held in the recessed portion 34. As a result, the exposed end surface of the L-shaped bent portion 30a of the plug blade 30 elastically deforms the extending portion 20a of the connecting terminal 20, and
make face-to-face contact with Then, after connecting this charger to the electric shaver, the raised plug 28 may be inserted into an outlet or the like. During this insertion, the plug blade 30 receives a force in a direction in which its L-shaped bent portion 30a is pushed out of the insulating base 29. This force is of course supported by the bearing part 27 via the shaft part 31, but also by the connection terminal 20 via the L-shaped bent part 30a, so that the extrusion force is applied exclusively to the plug blade 30. and insulation base 29
It will not be affected by the adhesive strength alone. Furthermore, when the charger is removed from an outlet or the like, the plug blade 30 is pulled toward its tip. This force is of course supported by the bearing part 27 via the shaft part 31, but since it is caught on the insulating base 29 that the inner surface of the L-shaped bent part 30a contacts, it is also supported at this caught part. Therefore, the tensile force is not received solely by the adhesive force between the plug blade 30 and the insulating base 29. Further, after charging, the plug 28 is rotated in the direction of the arrow I in FIG. 1, and the convex portion 32 is engaged and held in the concave portion 34 from the concave portion 35, so that the plug 28 is placed in the retracted state. As a result, the L-shaped bent portion 30a of the plug blade 30 separates from the extending portion 20a.

In the above embodiment, the connection terminal 21 is attached directly to the body case 1, but this may be connected via a cord, and in the present invention, waterproofing-related parts and structures are omitted. There is no problem. In addition, when implementing the present invention, unless it is contrary to the gist of the invention, the device case, charging parts, connection terminals, extensions, plugs, insulating bases, plug blades, L-shaped bent parts, etc. It goes without saying that the specific structure, shape, position, material, etc. are not limited to the one embodiment described above, and can be configured and implemented in various ways.

[Effect of idea]

According to the present invention, which has the gist of the configuration described in the scope of the above utility model registration claim, it is possible to ensure contact between the plug blade of the rotatable plug and the connection terminal attached to the device case, and also to Without increasing the size of the plug, the plug blade can be reliably supported against the insulating base regardless of the force that is applied to the plug blade when it is connected to and removed from an outlet, etc., and the connection structure between the connection terminal and the plug blade can be assembled as a whole. It has practical effects such as not becoming a factor that makes it difficult.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, in which Fig. 1 is a longitudinal side view, Fig. 2 is a cross-sectional view of the plug mounting part side with the plug removed, and Fig. 3 is a view of the upper case member with the plug protruded. FIG. 4 is a partially sectional plan view with the plug removed, and FIG. 4 is a rear view of the plug. 1... Instrument case, 17... Charging unit, 2
0... Connection terminal, 20a... Extension part, 28... Plug, 29... Insulating base, 30... Plug blade,
30a...L-shaped bent part.

Claims (1)

[Scope of utility model registration request] In a charger in which a plug with one end of a pair of plug blades embedded in an insulating base is rotatably attached to one side of a device case containing built-in charging parts,
The tip sides of the embedded portions of the pair of plug blades are bent toward the sides toward each other to form a substantially L-shaped bent portion, and the L-shaped bent portion is adjacent to the opposing side surfaces of the pair of plug blades. The inner surface of the L-shaped bent portion is in contact with the insulating base, and the outer surface of the L-shaped bent portion adjacent to the non-opposing side surfaces of the pair of plug blades is exposed to the outer peripheral surface along the rotation direction of the insulating base. A charger characterized in that the charger forms a surface contact portion with an extending portion of a connecting terminal attached to the device case.