JP2000030814A - Plug and cigar lighter plug - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a plug which can be smoothly inserted into and pulled out of a socket having a different diameter and has improved reliability of connection to the socket. SOLUTION: A fuse holder 2 is accommodated within a cylindrical case 1. A base part of a one-side terminal connection spring 3 having two-forked spring pieces is fixed within the case 1, while a part of each the spring piece projects from the case 1. In this cigar lighter plug, the spring pieces of the one-side terminal connection spring 3 are led out through gaps of the fuse holder 2 such that the fuse holder 2 can be moved within the case 1 in its axial direction. Thereby, because an opening between the two-forked spring pieces can be adjusted, this cigar lighter plug can be connected to a cigar lighter socket of every vehicle type having a different diameter.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plug such as a cigarette lighter plug installed in an automobile, and more particularly to a plug which can be smoothly connected to sockets having various diameters.

[0002]

2. Description of the Related Art A cigarette lighter is composed of a plug and a socket. When the plug is pushed deep into the socket, the energizing circuit of the heater is closed and the heater starts to generate heat.

FIG. 4 shows a part of a conventional cigarette lighter plug to be inserted into a socket, partially cut away. Inside the plug housing 1, holes 16 of the plug housing 1 are provided.
A -side terminal connection spring 3 whose bent portion is exposed from the outside and a bottomed fuse holder 2 are arranged. In the fuse holder 2, a fuse 4 and the fuse 4 are urged toward the plug tip. Fuse spring 7 is incorporated. The fuse spring 7 is connected to a lead wire 9, and the lead wire 9 is connected to a circuit board 15. The negative terminal connection spring 3 has a bifurcated spring piece whose base (center) is fixed in the housing 1 and connected to the circuit board 15 through the lead wire 8. The tip of the spring piece is engaged with an engaging portion 14 provided on the outer wall of the fuse holder 2. The positive terminal pin 6 is movably held in a hole of a truncated conical tip cap 5, and the tip cap 5 is screwed and fixed to the plug housing 1.

When the cigar lighter plug is inserted into a cylindrical socket, the negative terminal connection spring 3 exposed from the hole of the plug housing 1 elastically contacts the inner wall of the socket. When the plug is inserted all the way into the socket against this elastic force, the positive terminal pin 6 hitting the bottom of the socket is pushed into the plug. As a result, the positive terminal pin 6 electrically connected to the positive side of the socket is connected to the circuit board 15 via the fuse 4, the compressed fuse spring 7 and the lead wire 9. On the other hand, the negative terminal connection spring 3 contacts the inner wall of the socket and conducts with the negative side of the socket.

[0005]

However, conventional cigarette lighter plugs cannot be adapted to various cigarette lighter sockets having different diameters.

[0006] In recent years, the number of types of automobiles has increased, and accordingly, the types of peripheral devices used in the automobiles have increased, and the diameters and depths of cigarette lighter sockets also vary.

In a conventional cigarette lighter plug, if the spring design is performed in accordance with a large-diameter socket, when used for a small-diameter socket, the insertion and removal becomes hard, and the socket comes off the console with the plug attached. On the other hand, if a spring is designed in accordance with a socket having a small diameter, there is a problem that the socket is easily pulled out when used for a socket having a large diameter.

The present invention is to solve such a conventional problem, and provides a plug which can be smoothly inserted into and removed from sockets having different diameters and which can improve the reliability of connection with the socket. It is another object of the present invention to provide a cigarette lighter plug that can be used for a cigarette lighter socket of each model.

[0009]

Therefore, in the present invention, there is provided a spring adjusting means for adjusting the opening of the bifurcated spring piece of the connection spring by moving within the housing of the plug.

Further, in the cigar lighter plug of the present invention, the spring piece of the negative terminal connection spring is led out through the gap of the fuse holder, and the fuse holder is moved in the axial direction in the housing to open the bifurcated spring piece. Is adjustable.

Therefore, stable connection with sockets having different diameters is possible, and connection with cigar lighter sockets of each vehicle type is possible.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS According to the first aspect of the present invention, a base of a connection spring having a bifurcated spring piece is fixed in a housing, and a part of each spring piece protrudes from the housing. When the plug is inserted into the socket, the portion of the spring piece protruding from the housing resiliently contacts the inner surface of the socket, and is electrically connected to the plug. The spring adjustment for adjusting the opening of the bifurcated spring piece of the connection spring by moving in the housing. Means.
Stable connection with sockets having different diameters becomes possible.

According to a second aspect of the present invention, the spring adjusting means is provided with a slide knob for moving operation, and the slide knob is projected from a slide hole of the housing, so that the spring adjusting means can be easily operated. can do.

According to a third aspect of the present invention, the spring adjusting means is provided with a gap through which the spring piece of the connection spring passes, and when the spring adjusting means is moved in a direction to narrow the opening of the spring piece, an opening of the spring adjusting means is provided. The bifurcated spring piece is narrowed by the end, and the spring piece passing through the inside of the spring adjusting means hits the opening end of the moving spring adjusting means and is narrowed.

According to a fourth aspect of the present invention, the spring adjusting means is provided with a through hole through which a spring piece of the connection spring passes, a pin hole formed in a wall of the through hole, and a pin inserted into the pin hole. One end of the pin is in contact with a spring piece passing through the through hole, and the other end of the pin is in contact with the slope of the inner wall of the housing. When the spring adjusting means is moved, the pin moves along the slope of the inner wall of the housing inside the housing. And the opening of the spring piece is narrowed.

According to a fifth aspect of the present invention, two connection springs each having a bifurcated spring piece are arranged orthogonally in the housing, and a pin hole and a pin corresponding to each spring piece are provided in the spring adjusting means. At four positions, and the opening of the spring piece can be adjusted while exerting the centripetal function by the four pins.

According to a sixth aspect of the present invention, a fuse holder is incorporated in a cylindrical housing, and a base of a negative terminal connection spring having a forked spring piece is fixed in the housing. In the cigarette lighter plug whose part protrudes from the housing, the spring piece of the-side terminal connection spring is led out through the gap of the fuse holder, and the fuse holder is moved in the axial direction within the housing to open the bifurcated spring piece. It is adjustable and can be connected to cigarette lighter sockets of different car models with different diameters.

According to a seventh aspect of the present invention, the fuse holder is provided with a slide knob for moving operation, and the slide knob is projected from a slide hole of the housing, so that the opening of the spring piece can be easily adjusted. Can do it.

According to an eighth aspect of the present invention, when the fuse holder is moved in a direction to narrow the opening of the spring piece,
The bifurcated spring piece is narrowed down by the open end of the fuse holder. The spring piece is narrowed down by the open end of the moving fuse holder.

According to a ninth aspect of the present invention, the fuse holder is provided with a through hole through which the spring piece of the negative terminal connection spring passes, a pin hole formed in the wall of the through hole, and a pin inserted into the pin hole. One end of the pin contacts the spring piece passing through the through hole, and the other end of the pin contacts the slope on the inner wall of the housing. When the fuse holder is moved, the pin moves along the slope on the inner wall of the housing. It is pushed into the inside of the housing, and the opening of the spring piece is narrowed.

According to a tenth aspect of the present invention, two -side terminal connection springs having bifurcated spring pieces are arranged orthogonally in the housing, and a pin hole and a pin are provided in the fuse holder in each spring piece. Correspondingly, it is provided at four places, and the opening of the spring piece can be adjusted while exerting the centripetal function by the four pins.

Hereinafter, an embodiment of the present invention will be described with reference to FIG.
This will be described with reference to FIG.

(First Embodiment) As shown in FIG. 1A, a cigarette lighter plug according to a first embodiment includes a negative terminal connection spring 3 and a plug shaft inside a plug housing 1. Fuse holder 2 that can be moved in the direction
The fuse holder 2 includes a fuse 4 and a fuse spring 7 for urging the fuse 4 toward the tip of the plug.
And is incorporated. The negative terminal connection spring 3 has a bifurcated spring piece extending from a base (central part). The base is fixed to a rib in the plug housing 1 and connected to the circuit board 15 through a lead wire 8. The bifurcated spring piece is led out through the fuse holder 2, and its bent portion is exposed from the hole 16 of the plug housing 1.

As shown in FIG. 1B, the fuse holder 2 has a pair of slide knobs 12 and a groove 17 for guiding a spring piece of the negative terminal connection spring 3, and an open end of the groove 17. Has a notch 18 into which a spring piece enters.

The plug housing 1 is formed by combining two semi-cylinders, and each semi-cylinder is provided with a hole 16 at a joint portion thereof to expose a bent portion of the negative terminal connection spring 3 in a combined state. It has a notch to be formed and a notch to form a slide hole 19 from which the slide knob 12 of the fuse holder 2 projects.

The positive terminal pin 6 is movably held in a hole of a truncated conical tip cap 5 like the conventional device (FIG. 4), and this tip cap 5 is screwed into the plug housing 1. Fixed together. When the cigarette lighter plug is inserted into the socket, the positive terminal pin 6
Fuse 4, compressed fuse spring 7 and lead wire 9
Is connected to the circuit board 15 via.

When assembling the cigar lighter plug, the negative terminal connection spring 3 and the fuse holder 2 are combined in the state shown in FIG. 1B, and the fuse 4 and the fuse spring 7 are incorporated in the fuse holder 2. . Then, the two half cylinders of the plug housing 1 are joined so that the slide knob 12 protrudes from the slide hole 19 and the bent portion of the negative terminal connection spring 3 is exposed from the hole 16. Then, the tip cap 5 into which the + terminal pin 6 is inserted is screwed.

In this cigar lighter plug, when the slide knob 12 is moved in the direction of arrow A, the fuse holder 2 moves in the same direction, and accordingly, the fuse holder 2 is moved.
Notch 18 presses the spring piece of the negative terminal connection spring 3. As a result, the spring piece is narrowed down in the direction of arrow B, and the amount of protrusion of the negative terminal connection spring 3 protruding from the hole 16 of the plug housing 1 is reduced. Thus, in this cigar lighter plug, the opening of the spring can be adjusted by operating the slide knob 12.

Therefore, in this cigar lighter plug,
By adjusting the position of the slide knob 12 according to the diameter of the socket, it is possible to handle from a socket having a large diameter to a socket having a small diameter.

(Second Embodiment) A cigarette lighter plug according to a second embodiment, as shown in FIGS.
The fuse holder 2 includes two slide knobs 12 and two pin holding portions 11 extending in directions different from the slide knobs 12 by 90 °. This pin holding portion 11
A hole 20 for guiding the spring piece of the negative terminal connection spring 3 and a round hole 21 into which the pin 10 is inserted;
The tip of 10 is in contact with the spring piece of the negative terminal connection spring 3 in the through hole 20.

On the other hand, when the fuse holder 2 is disposed in the plug housing 1, a slide hole is formed at a position where the slide knob 12 projects, and at a position where the head of the pin 10 abuts, a tip of the plug is provided. The slope part 22 which inclines inward as it goes toward is formed. Other configurations are first
This is the same as the embodiment.

In this cigarette lighter plug, when the slide knob 12 is moved in the direction of the plug tip, the fuse holder 2 moves in the same direction. It is pushed towards the center of the plug (in the direction of arrow C). As a result, the tip of the pin 10 pushes the spring piece of the negative terminal connection spring 3 toward the center of the plug, and the opening of the spring is narrowed.

As described above, in this cigar lighter plug, the opening of the spring can be adjusted by the slide knob 12, and by adjusting the position of the slide knob 12 according to the diameter of the socket, the diameter of the socket can be changed from the large diameter socket. It can handle up to thin sockets.

(Third Embodiment) In a cigar lighter plug according to a third embodiment, as shown in FIGS. 3A and 3B, similarly to the second embodiment (FIG. 2), a pin and a slope portion are provided. The opening of the-side terminal connection spring is adjusted by
The difference from the second embodiment is that two negative terminal connection springs are provided.

The two negative terminal connection springs 3, 3 are arranged orthogonally, and accordingly, as shown in FIG. 3 (b), two slide knobs 12, four And two pin holding portions 11. The configuration of each pin holding unit 11 is the same as that of the second embodiment (pins are not shown in FIG. 3B). Further, a slope portion is formed in the plug housing 1 at a position where the pins 10 and 13 held by the pin holding portions 11 abut.

Since this cigar lighter plug has a 4-pin configuration, when the slide knob 12 is moved,
The central axis of the fuse holder 2 moves without deviating from the central axis of the plug housing 1. By providing the centripetal function in this way, adjustment can be stabilized.

In the embodiment, the cigarette lighter plug has been described. However, the present invention can be applied to a connection portion between a plug and a socket of various cables.

[0038]

As is clear from the above description, the plug of the present invention can adjust the opening of the spring in accordance with sockets having various diameters, enables smooth insertion and removal, and improves connection reliability. Can be improved.

Also, the cigar lighter plug of the present invention
Cigarette lighter sockets having different diameters to be mounted on automobiles of various types can be accommodated by relatively simple adjustment work.

[Brief description of the drawings]

FIG. 1 is a partially exploded view of a cigar lighter plug according to a first embodiment of the present invention,

FIG. 2 is a partially exploded view of a cigarette lighter plug according to a second embodiment of the present invention,

FIG. 3 is a partially exploded view of a cigarette lighter plug according to a third embodiment of the present invention;

FIG. 4 is a partially exploded view showing a conventional cigarette lighter plug.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Plug housing 2 Fuse holder-3 -side terminal connection spring 4 Fuse 5 Tip plug 6 + side terminal contact pin 7 Fuse spring 8-side terminal lead wire 9 + side terminal lead wire 10, 13 pin 11 Pin holding section 12 Slide knob 14 Engagement part 15 Circuit board 16 Hole 17 Groove 18 Notch 19 Slide hole 20 Through hole 21 Round hole 22 Slope

Claims (10)

[Claims] A base of a connection spring having a bifurcated spring piece is fixed in a housing, a part of each spring piece protrudes from the housing,
When the housing is inserted into the socket, the portion of the spring piece protruding from the housing resiliently contacts the inner surface of the socket and electrically connects the plug. The movement in the housing causes the bifurcated spring piece of the connection spring to open. A plug comprising a spring adjusting means for adjusting. 2. The apparatus according to claim 1, wherein said spring adjusting means includes a slide knob for moving operation, said slide knob protruding from a slide hole of said housing.
Plug described in. 3. The spring adjusting means has a gap through which a spring piece of the connection spring passes, and when the spring adjusting means is moved in a direction to narrow the opening of the spring piece, the spring adjusting means has an opening end. The plug according to claim 1, wherein the forked spring piece is narrowed. 4. The spring adjusting means includes a through hole through which a spring piece of the connection spring passes, a pin hole formed in a wall of the through hole, and a pin inserted into the pin hole, and one end of the pin 3. The plug according to claim 1, wherein the plug contacts a spring piece passing through the through hole, and the other end of the pin contacts a slope of an inner wall of the housing. 4. 5. The connection spring having two bifurcated spring pieces is arranged orthogonally in the housing, and the spring adjusting means sets the pin hole and the pin at four positions corresponding to each spring piece. 5. The plug according to claim 4, wherein the plug is provided. 6. A fuse holder is built in a cylindrical housing, and a base of a negative terminal connection spring having a forked spring piece is fixed in the housing, and a part of each spring piece protrudes from the housing. In the cigar lighter plug, the spring piece of the negative terminal connection spring is led out through the gap of the fuse holder, and the fuse holder is moved in the axial direction in the housing to open the forked spring piece. A cigarette lighter plug that is adjustable. 7. The cigar lighter plug according to claim 6, wherein the fuse holder includes a slide knob for moving operation, and the slide knob protrudes from a slide hole of the housing. 8. The bifurcated spring piece is narrowed by the open end of the fuse holder when the fuse holder is moved in a direction to narrow the opening of the spring piece. Cigarette lighter plug. 9. The fuse holder includes a through hole through which a spring piece of the negative terminal connection spring passes, a pin hole formed in a wall of the through hole, and a pin inserted into the pin hole. 8. The cigar lighter plug according to claim 6, wherein one end of the cigarette lighter abuts a spring piece passing through the through hole, and the other end of the pin abuts a slope on an inner wall of the housing. 9. 10. The housing, wherein two negative terminal connection springs each having a bifurcated spring piece are arranged orthogonally, and the fuse holder is provided with the pin hole and the pin corresponding to each spring piece. The cigar lighter plug according to claim 9, wherein the plug is provided at four places.