JPH0660074U - Retractable plug - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a retractable plug in which dust, metal pins such as insect pins, and other foreign matter are less likely to enter the case through the gap between the side surface of the hinge and the case. To do. [Structure] A case 12 is rotatably attached via a hinge portion 24, and is selectively erected in an upright state in which it is inserted into an outlet or in a sideways state accommodated in a rectangular parallelepiped recess 14 provided in the case 12. A retractable plug 10 having a pair of contact fittings 20 adapted to be formed on a side surface of the hinge portion 24 so as to close a gap formed between the side surface 24 a of the hinge portion 24 and the case 12. Convex part 4
0 is provided.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a foldable plug provided on an AC-DC converter, a battery, etc., and selectively placed in an upright state in which it is inserted into an outlet and in a sideways state accommodated in a recess provided in a case. .

[0002]

[Prior art]

 A foldable plug of this type is illustrated in FIGS. The retractable plug 50 shown in the figure has a plug-in contact metal fitting 20 which is swingably supported by a case 12 forming an AC-DC converter, a battery or the like via a resin hinge portion 24. .

The contact fitting 20 is formed by attaching and fixing two elongated metal plates to the hinge portion 24 so as to be parallel to each other with a certain distance therebetween and to expose both end portions thereof, and to be inserted into a socket. The standing state (solid line in FIGS. 4 and 6) and the sideways state (chain line in FIG. 4, FIG. 5) accommodated in the recess 14 having a rectangular cross section provided in the case 12 can be selectively set. There is.

To explain this in more detail, when the case 12 is erected (rotated 90 degrees from the sideways state) as shown by the solid line in FIG. 6, the two contact fittings 20 The pair of contact fittings 13 are arranged on the left and right with two pieces that contact the rear end portions so as to pinch both sides thereof, and each form an X-shape in a plan view “H” shape. A circuit board 15 to which the rear end of the contact fitting 13 is connected is arranged.

Further, as shown in FIGS. 5 and 6, a resin holder 30 is arranged at the corner of the recess 14 of the case 12 to regulate the swing of the contact fitting 20. This resin holder 30 has a substantially L-shaped cross section at the top, and as shown in FIG. 5, when the contact metal fitting 20 is in the sideways state, a hemispherical projection 25 provided on its hinge portion 24. Is brought into contact with the slope 31a forming the inner corner of the upper rising side 31 of the resin holder 30, and when the contact fitting 20 is raised from this state, the protrusion 25 gets over the inner corner. It rotates as indicated by the alternate long and short dash line in FIG.

When it is further rotated, the protrusion 25 is pressed against the upper surface of the bottom side 32 of the resin holder 30 to obtain a certain feeling of response, and then the spherical step formed on the upper corner portion of the bottom side 32. While being dropped into the portion 32a, one side surface of the hinge portion 24 abuts against the end surface 14a of the concave portion 14 of the case 12 and is locked, whereby the swing of the contact fitting 20 is restricted and the standing state is maintained. It is like this.

In this process, the rear end portion of the contact metal fitting 20 is sandwiched by the above-described contact metal fitting 13 to be electrically connected, and in this state, the contact metal fitting 20 is inserted into the outlet, whereby the AC-DC Conversion or charging is performed.

[0008]

[Problems to be solved by the device]

 In the above-described conventional retractable plug 50, when the contact fitting 20 is tilted, a large gap S is generated between the side surface 24a of the hinge portion 24 and the inner end 14c of the bottom surface 14b of the recess 14, and the gap S is generated. There is a risk that dust may enter the inside of the case 12 or metal pieces such as insect pins or other foreign matter may enter the inside of the case 12 to cause a problem such as a short circuit.

In view of such a point, the present invention is a retractable type in which dust, metal pieces such as insect pins, and other foreign matter are hard to enter into the case from a gap formed between the side surface of the hinge portion and the case. Intended to provide a plug.

[0010]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the foldable plug according to the present invention is basically rotatably attached to a case forming an AC-DC converter, a battery, etc. via a hinge part and is attached to an outlet. It has a pair of contact fittings that can selectively take a standing state to be inserted and a sideways state to be accommodated in a rectangular parallelepiped recess provided in the case.

Further, a feature is that a convex portion is provided on a side surface of the hinge portion so as to close a gap generated between the side surface of the hinge portion and the case.

[0012]

[Action]

 In the retractable plug according to the present invention configured as described above, the protrusion formed on the side surface of the hinge portion closes the gap between the side surface of the hinge portion and the case, so that the case It is difficult for dust, metal pieces such as insect pins, and other foreign matter to enter the inside, and as a result, problems such as short circuits are effectively prevented, and parts such as blind plates are unnecessary. It is possible to reduce the assembly cost and the like.

[0013]

【Example】

 Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 to 3 show an embodiment of a retractable plug according to the present invention.

Like the above-described conventional retractable plug 50, this retractable plug 10 can swing on a case 12 forming an AC-DC converter, a battery, etc. via a resin hinge portion 24. It has a supported plug-in type contact fitting 20.

The contact fitting 20 is formed by attaching and fixing two elongated metal plates to the hinge portion 24 in parallel so as to be separated by a predetermined distance so that both ends thereof are exposed, and is inserted into a socket. The standing state (solid lines in FIGS. 1 and 3) and the laterally-folded state (chain line in FIG. 1, FIG. 2) accommodated in the recess 14 having a rectangular cross section provided in the case 12 are selectively movable. There is.

As shown by the solid line in FIG. 3, the case 12 is erected (rotated 90 degrees from the sideways state) so that the rear ends of the two contact fittings 20 are sandwiched on both sides. A pair of contact fittings 13 are arranged on the left and right, and two are in contact with each other by pressing, and each form an X-shape in a plan view “H” shape, and the rear end of the contact fitting 13 is connected. The circuit board 15 is arranged.

Further, as shown in FIGS. 2 and 3, a resin holder 30 is arranged at the corner of the recess 14 of the case 12 to regulate the swing of the contact fitting 20. The resin holder 30 has a substantially L-shaped cross-section at the top, and one end side of the L-shaped portion (31, 32) is fixed to the case 12 with a screw 36. Therefore, the L-shaped portion (31, 32) is It is cantilevered and flexibly supported.

The upper ends of the L-shaped portions (31, 32) abut the upper inner surface 12a of the case 12, and the coil spring 35 is compressed between the lower end of the lower standing portion 33 and the lower inner surface 12b of the case 12. Is mounted and the resin holder 30 is urged upward in the drawing. The coil spring 35 is externally mounted on a downward rod-shaped piece 37 projecting from the lower standing portion 33, and its lateral behavior is restricted.

In this case, as shown in FIG. 2, when the contact metal fitting 20 is in the sideways state, the hemispherical protrusion 25 provided on the hinge portion 24 of the contact metal fitting 20 has an inner corner of the upper rising side 31 of the resin holder 30. When the contact fitting 20 is raised from this state, the protrusion 25 pushes the inner corner portion downward, whereby the coil spring 35 is compressed and the L-shaped portion ( (31, 32) is entirely bent, and the protrusion 25 rides over the inner corner portion and rotates as shown by the alternate long and short dash line in FIG.

When further rotated, the protrusion 25 presses against the upper surface of the bottom side 32 of the resin holder 30 and pushes down the bottom side 32, whereby the coil spring 35 is compressed and a certain feeling of response is obtained. While being dropped into the spherical step portion 32a formed in the upper corner portion of the bottom side 32, one side surface of the hinge portion 24 is abutted against the end surface 14a of the recess 14 of the case 12 to be locked, whereby the contact is made. The shaking of the metal fitting 20 is restricted so that the standing state is maintained.

In this process, the rear end portion of the contact metal fitting 20 is sandwiched between the contact metal fittings 13 described above to be electrically connected, and in this state, the contact metal fitting 20 is inserted into the outlet, thereby the AC-DC. Conversion, charging, etc. are performed.

Here, in the present embodiment, in order to prevent a large gap S (see the conventional example of FIG. 6) from occurring between the side surface of the hinge portion 24 and the inner end 14b of the bottom surface 14b of the recess 14, A convex portion 40 having a semicircular cross section is projected from the side surface of the hinge portion 24, and a cylindrical insertion preventing body 42 is provided upright at substantially the center of the concave portion 14 of the case 12.

In the retractable plug 10 of the present embodiment having such a configuration, the resin holder 30 is biased by the coil spring 35, so that the contact fitting 20 is changed from the sideways state to the standing state. At this time, the protrusion 25 of the hinge portion 20 comes into pressure contact with the resin holder 30 and pushes it down against the elastic force of the coil spring 35 to pass (rotate). That is, instead of using the elasticity of the resin holder 30 to make it concave as in the conventional one, the expansion and contraction of the coil spring 35 is used to bend the resin holder 30 in the pressure contact direction.

Therefore, even if the contact metal fittings 20 are repeatedly tilted up and down, the resin holder 30 is less likely to be worn or “set”, and a certain feeling of touch is obtained when the contact metal fittings 20 are tilted. In addition, the contact metal fittings are less prone to shake and the stability is improved.

Further, even when the resin holder is deformed by heat during AC-DC conversion, charging, etc., the elastic force of the spring 35 always provides a substantially constant feeling of response, and the standing state is held stable. It

An insertion preventing body 42 is erected in the recess 14 of the case 12, and the protrusion 40 provided on the side surface of the hinge portion 24 is provided between the side surface 24 a of the hinge portion 24 and the case 12. Since the generated gap S is closed, dust, metal pieces such as insect pins, and other foreign matter are less likely to enter the case 12, and as a result, the occurrence of defects such as a short circuit is effectively prevented. Since parts such as a blind plate are not necessary, the assembly cost can be reduced.

[0027]

[Effect of device]

 As is clear from the above description, in the retractable plug according to the present invention, the protrusion formed on the side surface of the hinge portion closes the gap between the side surface of the hinge portion and the case, so that As dust, metal pieces such as insect pins, and other foreign matter are less likely to enter, as a result, problems such as short circuits can be effectively prevented, and parts such as blindfold plates are not required. It is possible to obtain the effect of suppressing such problems.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a retractable plug according to the present invention.

FIG. 2 is a partial cross-sectional view provided for explaining the configuration of the embodiment of FIG.

FIG. 3 is a partial cross-sectional view provided with an explanation of the operation of the embodiment of FIG.

FIG. 4 is a perspective view showing an example of a conventional retractable plug.

5 is a partial cross-sectional view provided for explaining the configuration of the example in FIG.

6 is a partial cross-sectional view provided with an explanation of the operation of the example of FIG.

[Explanation of symbols]

 10 Retractable Plug 12 Case 14 Recess 20 Contact Metal Fitting 24 Hinge 24a Side 30 Resin Holder 35 Coil Spring 40 Convex 42 Insert Prevention Body

Claims (1)

[Scope of utility model registration request] 1. A standing state, which is rotatably attached to a case via a hinge and is inserted into an outlet, and a sideways state, which is accommodated in a rectangular parallelepiped recess provided in the case, can be selectively set. In a retractable plug having a pair of contact fittings, a convex portion is provided on a side surface of the hinge portion so as to close a gap formed between the side surface of the hinge portion and the case. And a retractable plug.