JP2525339Y2 - Car battery plug - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a car battery plug to be inserted into a cigarette lighter socket of an automobile, and more particularly, to a cigarette lighter socket having a different diameter used in European cars, Japanese cars, and American cars. The present invention relates to a car battery plug having a function of preventing erroneous insertion while obtaining a sufficient holding force correspondingly.

[0002]

2. Description of the Related Art Generally, a car battery plug for connection for supplying power to a vehicle-mounted electric device such as a lighting device or a car stereo is inserted into a cigarette lighter socket (hereinafter simply referred to as a socket) of a vehicle. Although the socket energization method is common worldwide, the standard of the diameter of the socket of the European car is large, and the standard of the diameter of the socket of the Japanese car and the US car is slightly smaller.

Therefore, in order to accommodate these sockets having different diameters with a single type of car battery plug (hereinafter simply referred to as a plug), the amount of leaf spring-like contact protruding from the outer periphery of the plug body in accordance with the diameter of the socket. Has been already proposed by the present applicant (Japanese Utility Model Application No. 4-17339).

[0004] As shown in FIGS. 8 and 9, a cylindrical plug main body 21 inserted into a socket 20, a fixed end is fixed inside the plug main body 21, and a spring end is connected to the outer periphery of the plug main body 21. A pair of leaf spring-shaped contacts 23 arranged to protrude from the contact opening 22 cut out in the outer periphery of the plug body 21, and slidably arranged on the outer periphery of the fuse holding portion 24, A pair of sliders 25 for adjusting the protrusion, which are in sliding contact with the inner surfaces of the spring ends 23a of the contacts 23, 23;
5 is connected integrally to the rear end of the plug body 2 and
1 is a plug comprising an adjustment knob 26 slidably protruding through a window 21a opened on the outer periphery of the rear part of the vehicle.

Reference numeral 27 denotes an external fuse terminal also serving as a cap protruding from the tip of the plug body 21, reference numeral 28 denotes an internal fuse terminal, reference numeral 29 denotes a fuse for preventing overcurrent, reference numeral 30.
Indicates a first step, 31 indicates a second step, and 32 indicates a protrusion amount of the contact 23 from the outer periphery of the plug body.

With a plug formed in this way, as shown in FIG. 8, the adjusting knob 26 is slid in a predetermined direction (leftward in the figure) for a European car having a large diameter of the socket 20. The protrusion 32 of the contact 23 is increased, and the inner wall surface of the socket 20 and the outer surface of the contact 23 are brought into strong contact to ensure a sufficient holding force.

For a small-diameter socket 20a of a Japanese car or the like, as shown in FIG. Is used with a smaller size.

[0008]

However, although the above-mentioned plug can be used with a single model of a socket having a different diameter, the above-mentioned plug lacks a function of preventing incorrect insertion of the plug. In other words, if the contact of the plug is erroneously set to a large diameter for a European car with a large diameter and the driver forcibly inserts it into a socket of a Japanese car with a small diameter, the curved portion of the contact is deformed. Resulting in. Then, when the plug whose contact has been deformed is inserted into a large-diameter socket, the contact resistance between the contact and the socket becomes extremely small, and sufficient holding force cannot be obtained, and the plug may fall out of the socket. There were the drawbacks mentioned.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and has a function of preventing erroneous insertion of cigarette lighter sockets having different diameters while ensuring sufficient holding force for each of the cigarette lighter sockets. It is an object of the present invention to provide a car battery plug provided with:

[0010]

SUMMARY OF THE INVENTION In order to solve the above problems of the present invention and achieve the above object, a gist of a cylindrical plug body inserted into a cigarette lighter socket and a fixed end are fixed inside the plug body. A pair of leaf spring-shaped contacts arranged so as to protrude from a contact opening formed by cutting a spring end on the outer periphery of the plug body to the outer periphery of the plug body; In my heart
A heat sink disposed between the pair of contacts
And a pair of sliders slidably disposed between the fuse and an outer peripheral portion of the fuse and the contact, for adjusting a protrusion amount of a spring end of each contact, and between a sliding contact portion of the contact and the slider. A sliding spring plate interposed between the slider and the outer peripheral portion of the slider is integrally extended, and
An adjusting knob that slidably protrudes through a window opening on the outer periphery of the plug main body, wherein the slider protrudes from the contact opening by the slider at the tip of the sliding spring plate. When the amount is increased, a stopper protrudes from the contact opening and, when the plug is inserted into a small-diameter socket, collides with the inlet edge of the socket to prevent the plug from being inserted. That is.

According to a second aspect of the present invention, in the car battery plug, stoppers that operate in the same manner as described above are provided upright on both side edges of the inside of the contact that slides on the slider. Further, as described in claim 3, Oite the car battery plug, the side edges of the inner part which is in contact with the sliding spring plate of the front end portion of the contact, erected a stopper which acts in the same manner as described above It was done.

[0012]

In the plug according to the present invention, the contact from the contact opening of the plug body is operated by operating the adjusting knob by the stopper set up at the tip of the sliding spring plate so as to correspond to a large-diameter socket. When the amount of protrusion of the sliding spring plate is increased, the stopper of the sliding spring plate also projects from the contact opening. When the plug in this state is inserted into a large-diameter socket, the plug is inserted into the socket without the stopper colliding with the entrance edge of the socket. On the other hand, when the plug is to be inserted into a small-diameter socket, the end face of the stopper collides with the entrance edge of the socket, preventing further insertion. In this way, erroneous insertion of the plug into the small-diameter socket with the contact protrusion amount increased is prevented.

If the amount of protrusion of the contact is reduced by operating the adjustment knob to make the contact of the plug correspond to a small-diameter socket, the stopper is buried inside the plug body without protruding from the contact opening. It is what becomes. Claims 2 and 3 are modifications in which the location of the stopper is changed, and the operation and effect of the stopper are the same as described above.

Next, the present invention will be described with reference to the drawings. FIG. 1 is a partial longitudinal sectional view of the plug according to the present invention, FIG. 2 is a longitudinal sectional view of the plug, and FIG. 3 is a front view and a plan view of a sliding spring plate . In the drawing, reference numeral 1 denotes a plug according to the present invention, 2 and 3 denote ground contacts, 4 and 5 denote sliding spring plates, 6 denotes a stopper, 7 denotes a plug body, 8 denotes a slider, and 9 denotes an adjustment knob. I have. For easy understanding, the same reference numerals are given to those corresponding to the conventional example.

The gist of the plug 1 of the present invention is to increase the amount of protrusion 32 of the contacts 2 and 3 of the plug 1 from the contact opening 22 so as to correspond to a large-diameter socket (for example, for European vehicles). Even if the plug 1 in this state is erroneously inserted into a small-diameter socket (for example, for a Japanese car) when set, the stopper 6 provided on the sliding spring plates 4 and 5 prevents erroneous insertion. is there.

Referring to FIG. 2, the structure of the plug 1 according to the present invention will be described. A cylindrical plug body 7 which can be inserted into a cigarette lighter socket 20 of an automobile, and the plug body 7
A terminal 10 protruding from the tip of the terminal 20 and abutting on the electrode of the socket 20; a tip of the terminal 10 contacting the rear end of the terminal 10; and the other end connected to the fuse terminal 13 via a fuse holding / terminal portion 12. A fuse 29 for preventing overcurrent to be provided, these terminals 10 and the fuse 2
9 and a fixed end fixed to the inside of the plug body 7, and a spring end 2a, 3
a, a pair of leaf spring-shaped contacts 2 and 3 arranged so as to protrude from the contact opening 22 provided on the outer periphery of the plug body 7 to the outer periphery of the plug body 7;
A pair of sliders 8 that are slidably disposed on the outer peripheral portion of the fuse 29 and slidably contact the inner portions of the contacts 2 and 3, Slide spring plates 4 and 5 interposed between
And a window 14 (see FIG. 4) which is integrally extended to the outer peripheral portion of the slider 8 and opens to the outer periphery of the plug body.
(B), and an adjusting knob 9 which is slidably protruded through the sliding spring plates 4 and 5 and provided with stoppers 6 which are bent upward from both side edges of the leading ends of the sliding spring plates 4 and 5. It is.

Further, a cap 1 for covering the terminal 10 and the connecting member 11 is provided at a tip 15 of the plug body 7.
6 are detachably fixed by means such as screwing, and the ends of an electric cord (not shown) are connected to the cord connection terminal 17 and the fuse terminal 13 extending from the rear end of the contact 2, respectively. The main body 7 is drawn out from the rear end opening 7a to the outside.

The stopper 6 provided on the sliding spring plates 4 and 5 will be described. As shown in FIGS. 3 (a) and 3 (b), at each of the distal ends of the sliding spring plates 4 and 5, the plate is extended upward at substantially right angles from both side edges of the plate at the distal end. Further, stoppers 6 and 6 are formed by making the upper part of the bent plate material project from the spring plate main body toward the left direction in the drawing. The sliding spring plates 4 and 5 provided with the stopper 6 and the contact 2
FIG.

If the plug 1 is to be inserted into a large-diameter socket 20 of a European car or the like, the adjustment knob 9 is set to the L position as shown in FIGS.
Then, the slidable slider 8 inside the plug body 7 is
Slides to the tip side (to the left in FIG. 1), and the slider 8
The protrusions 8a push up the distal ends of the sliding spring plates 4 and 5 and the spring ends 2a and 3a of the contacts 2 and 3 toward the outer periphery of the plug body 7.

Accordingly, the contacts 2 and 3 protrude from the contact opening 22 of the plug body 7 and the amount of protrusion 32 becomes large, and the upper end of the stopper 6 at the tip of the sliding spring plates 4 and 5 becomes It protrudes from the opening 22.
In this state, if the plug 1 is properly inserted into the large-diameter socket 20 of the automobile, the upper end of the stopper 6 on the distal end side is inserted without any obstacle without contacting the entrance edge of the socket 20.

However, if it is attempted to insert the plug 1 into the small-diameter socket 20a while keeping the projections 32 of the contacts 2 and 3 of the plug 1 shown in FIG. 1 large, as shown in FIG. Since the distance from the center axis of the plug 1 to the upper end 6a on the distal end side of the stopper 6 protruding from the contact opening 22 is larger than the radius dimension up to the inner wall surface of the socket 20a, the stopper is provided at the entrance edge 20b. 6 collide with each other.

In this manner, erroneous insertion of the plug 1 can be prevented. As shown in FIG. 2, the adjustment knob 9 is set to the S position corresponding to the small-diameter socket, the slider 8 is retracted to the rear end side of the plug body 7, and the protrusion 32 of the contacts 2 and 3 is reduced. In this case, the stopper 6 is buried inside the plug body 7 together with the sliding spring plates 4 and 5, so that it does not become an obstacle.

Although the plug 1 according to the present invention is formed as described above, the present invention is not limited to the above embodiment, but the shape of the stopper 6 can be changed as appropriate. May be provided.

For example, as shown in FIG. 6, an inner portion 2c integrally extending from one end of a spring is provided for the contacts 2 and 3 so as to directly contact the slider 8, and the inner portion 2c is provided. The contact 2b is provided with stoppers 6b, 6b extending upwardly from both side edge portions. The stopper 6a is elongated in the left-right direction as shown, and is suitable for receiving the force in the left-right direction. In this case, the sliding spring plates 4 and 5 shown in FIGS. 1 and 2 become unnecessary because the inner portion 2c replaces them. The function and effect of the stopper 6b of the contact 2b are the same as described above.

Further, as shown in FIG.
The contact 2d may be provided with a stopper 6c on the inner side of the distal end of the contact 3. Then, using a sliding spring plate having no stopper 6 of the sliding spring plates 4 and 5, the tip of the stopper 6c of the contact 2d collides with the entrance edge 20b of the small-diameter socket 20a and is deformed. To prevent The function and effect of the stopper 6c of the contact 2d are the same as those described above, and the description is omitted.

[0026]

As described above, the car battery plug according to the present invention is provided at the tip of the sliding spring plate interposed between the slider and the inside of the contact projecting from the contact opening of the plug body. When the amount of protrusion of the contact is increased, a stopper is provided which protrudes from the contact opening and collides with the entrance edge of the small-diameter socket to prevent the plug from being inserted. The reliability of the product is improved without causing contact set-off.

According to the second aspect, the contact is provided with a stopper and also serves as a sliding spring plate, so that the same effect as described above can be obtained and the number of parts can be reduced. Further, a stopper can be provided on the inner side on the tip end side of the contact as in claim 3, and the same effect as in claim 1 can be obtained.

[Brief description of the drawings]

FIG. 1 is a partial longitudinal sectional view of a plug according to the present invention.

FIG. 2 is a longitudinal sectional view showing the structure of the plug.

FIG. 3 is a front view (a) and a plan view (b) of a sliding spring plate.

FIG. 4 is a side view (a), a front view (b), and a bottom view (c) showing the external appearance of the plug.

FIG. 5 is a partially enlarged explanatory view showing the operation of a stopper.

FIG. 6 is a sectional view (A), a front view (B), and a bottom view (C) of a contact according to another embodiment taken along line AA.

FIG. 7 is a front view (a) and a bottom view (b) of a contact according to another embodiment.

FIG. 8 is a longitudinal sectional view of a conventional example in which the amount of protrusion of a contact of a plug is increased.

FIG. 9 is a longitudinal sectional view showing a case where the amount of protrusion of a contact of a plug according to a conventional example is reduced.

[Explanation of symbols]

1. Plugs according to the present invention, 2, 3 Ground contacts, 2b, 2d Contacts according to other embodiments, 2a,
3a Spring end, 4,5 sliding spring plate, 6 stopper, 6b, 6c Stopper according to other embodiment, 7 plug body, 8 slider, 9 adjustment knob.

Claims (3)

(57) [Scope of request for utility model registration] A cylindrical plug body to be inserted into a cigarette lighter socket; a fixed end fixed to the inside of the plug body, and a spring end cut out from an outer periphery of the plug body through a contact opening. a pair of contact leaf springs like which are arranged to protrude to the outer periphery of the plug body, is disposed along the axis in the center of the plug body the one
A fuse interposed between the pair of contacts, sliding is freely disposed on an outer peripheral portion of the fuse, and a pair of sliders for adjusting the amount of projection of the spring end of said each contact, the contact with the sliding contact portion of the slider A car battery plug, comprising: a sliding spring plate interposed therebetween; and an adjusting knob integrally extended on an outer peripheral portion of the slider, and slidably protruding through a window portion opened on the outer periphery of the plug body. When the amount of protrusion of the contact from the contact opening is increased by the slider at the tip of the sliding spring plate, the plug protrudes from the contact opening and is inserted into a small-diameter socket. Has a stopper that collides with the inlet edge of the socket and prevents insertion of the plug, Become a car battery plug. 2. A cylindrical plug body inserted into a cigarette lighter socket, and a fixed end fixed to the inside of the plug body, and a spring end cut out from a contact opening provided on the outer periphery of the plug body. a pair of contact leaf springs like which are arranged to protrude to the outer periphery of the plug body, is disposed along the axis in the center of the plug body the one
A fuse interposed between the pair of contacts, sliding is freely disposed on an outer peripheral portion of the fuse, extending integrally with a pair of sliders for adjusting the amount of projection of the spring end of said each contact, the outer peripheral portion of the slider And an adjusting knob slidably protruding through a window portion opened on the outer periphery of the plug body, wherein the slider is provided on both side edges of an inner portion of the contact that slides on the slider. When the amount of protrusion of the contact from the contact opening is increased, the contact protrudes from the contact opening, and when the plug is inserted into a small-diameter socket, the plug collides with the entrance edge of the socket and the plug A car battery plug characterized by the fact that a stopper that prevents the insertion of the battery has been erected. 3. A cylindrical plug body inserted into a cigarette lighter socket, and a fixed end fixed to the inside of the plug body and a spring end cut out from an outer periphery of the plug body through a contact opening. a pair of contact leaf springs like which are arranged to protrude to the outer periphery of the plug body, is disposed along the axis in the center of the plug body the one
A fuse interposed between the pair of contacts, sliding is freely disposed on an outer peripheral portion of the fuse, and a pair of sliders for adjusting the amount of projection of the spring end of said each contact, the contact with the sliding contact portion of the slider A car battery plug comprising: a sliding spring plate interposed therebetween; and an adjusting knob integrally extended on an outer peripheral portion of the slider and slidably protruding through a window portion opened on the outer periphery of the plug body. When the amount of protrusion of the contact from the contact opening is increased by the slider on both side edges of the inner portion of the tip of the contact that is in contact with the sliding spring plate, the contact opening When the plug is inserted into a small-diameter socket, it collides with the entrance edge of the socket and stops the plug from being inserted. Car battery plug made that you have erected a stopper to stop, as a feature.