JPH0660073U - Retractable plug - Google Patents

Abstract

(57) [Summary] [Purpose] Even if the contact metal fittings are repeatedly tilted up and down alternately, the protrusion press contact part of the resin holder will be worn or "fallen".
(EN) Provided is a retractable plug that can prevent a contact from occurring and thus can provide a constant feeling of touch when the contact fitting is tilted and that is hard to swing when it is in an upright position. A structure is rotatably attached to a case 12 through a hinge portion 24 so that a standing state in which it is inserted into an outlet and a sideways state accommodated in a recess 14 provided in the case can be selectively set. Pair of contact fittings 20
And to restrict the swing of the contact fitting 20,
The hinge portion 24 (the projection 25 thereof) is brought into pressure contact with the resin holder 30 arranged in the case 12, and the resin holder 30 is biased in a direction opposite to the pressure contact direction of the hinge portion 24. A coil spring 35 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 raised from the sideways state to the standing state, the projection 25 provided on the hinge portion 24 is pressed against the upper surface of the bottom side 32 of the resin holder 30 and passes through. It is designed to let you. In other words, the elasticity of the resin holder 30 is used to make it slightly concave by the pressing force of the protrusion 25.

Therefore, while the contact metal fitting 20 is repeatedly tilted up and down, the pressure contact portion of the protrusion 25 of the resin holder 30 is worn away and fatigue causes so-called “sag”, which gives a constant response when the contact metal fitting 20 is tilted. I don't get the feeling. In addition, there is a problem that the contact metal fitting 20 is extremely apt to swing and lacks stability.

In particular, during AC-DC conversion, charging, etc., the temperature inside the case 12 rises, but the heat causes the resin holder 30 to be easily deformed when the contact fitting 20 is tilted. It is easy to occur.

In view of the above point, the present invention makes it possible to prevent the protrusion press-contacting portion of the resin holder from being worn away or causing “sagging” even if the contact metal fitting is repeatedly tilted up and down. It is an object of the present invention to provide a foldable plug in which a constant feeling of touch is obtained and the contact metal fitting is hard to swing.

[0012]

[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 recess provided in the case, and the hinge is used to regulate the swing of the contact fittings. The part is configured to be in pressure contact with the resin holder arranged in the case.

Further, it is characterized in that a vane for urging the resin holder in a direction opposite to a pressure contact direction of the hinge portion is provided.

[0014]

[Action]

 In the foldable plug according to the present invention configured as described above, since the resin holder is biased by the spring, when the contact metal fitting is erected from the sideways state to the upright state, the hinge portion is made of resin. It comes into pressure contact with the holder and pushes it down against the elasticity of the spring to pass (rotate) it. In other words, instead of using the elasticity of the resin holder to make it concave as in the conventional one, the expansion and contraction of the spring is used to move or bend the resin holder in the pressing direction.

Therefore, even if the contact metal fitting is repeatedly tilted up and down, the resin holder is less likely to be worn away or "set", and a certain feeling of touch can be obtained when the contact metal fitting is tilted down. Further, the contact metal fittings are less likely to swing, 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 always provides a substantially constant feeling of response and the contact metal fitting is stably held.

[0017]

【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 conventional retractable plug 50 described above, the retractable plug 10 can swing on the 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 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 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, when the case 12 is erected (rotated from the sideways state by 90 degrees), 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.

Then, the upper ends of the L-shaped portions (31, 32) contact 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 fitting 20 is in the sideways state, the hemispherical projection 25 provided on the hinge portion 24 of the contact 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) as a whole, the projection 25 rides over the inner corner portion and rotates as shown by the alternate long and short dash line in FIG.

When it is 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 and 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.

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 elasticity 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 elasticity of the spring 35 always provides a substantially constant feeling of response, and the standing state is held stable. It

In the present embodiment, in order to prevent a large gap S (see the conventional example in FIG. 6) from occurring between the side surface of the hinge portion 24 and the inner end 14c of the bottom surface 14b of the recess 14, A convex portion 40 having a semicircular cross section is provided on 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. As a result, it is possible to prevent dust from entering the case 12 through the gap, and to prevent a metal piece such as an insect pin from entering the case 12 and causing a problem such as a short circuit.

[0030]

[Effect of device]

 As is clear from the above description, the retractable plug according to the present invention can prevent the resin holder from being worn or “settled” even if the contact fitting is repeatedly tilted up and down. The contact metal fittings are less likely to swing and the stability is improved, and even if the resin holder is deformed by heat during AC-DC conversion, charging, etc. An excellent effect that a substantially constant feeling of response can be obtained and the standing state can be stably maintained is obtained.

[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 25 Protrusion 30 Resin Holder 35 Coil Spring

Claims (1)

[Scope of utility model registration request] 1. A case is rotatably attached to a case via a hinge so that a standing state in which it is inserted into an outlet and a sideways state accommodated in a recess provided in the case can be selectively obtained. A retractable plug having a pair of contact metal fittings, wherein the hinge portion is configured to come into pressure contact with a resin holder arranged in the case in order to regulate swing of the contact metal fittings. A retractable plug, comprising a spring for urging the holder in a direction opposite to the pressure contact direction of the hinge portion.