JPS6314470B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a power outlet plug for an automobile, which is inserted into a socket of a cigarette lighter in an automobile to extract power.

A power outlet plug for an automobile has a fuse tube housed in its inner cavity, a front insertion main body section with an inner terminal and an outer terminal, a connecting terminal piece for the outer terminal, and an inner terminal. The knob part on the rear half side, which has a connecting terminal piece for the purpose, is removably connected, and each terminal and the knob on the insertion main body side are in a connected state by separating the insertion main body part and the knob part. Each terminal piece on the side can be removed, and with the insertion main part and the knob part connected, they can be inserted into the socket of a car's cigarette lighter to extract the desired power source.
The terminal on the socket side of the cigarette lighter is formed along the axial direction as shown in Figure 19, and when inserting the power outlet plug into the socket, the terminal on the plug side is correctly connected to the terminal on the socket side. The terminal on the plug side is formed into a ring shape so that the connection can be made at the same time as the plug is inserted even if they are not matched, and a plurality of connection tongues are formed on the circumference of the ring shape, and a plurality of tongue pieces for connection are formed on the circumference of the ring shape. There is. However, conventional outer terminals have problems such as requiring a complicated process to squeeze out a metal plate into a ring shape and process a connecting tongue on the ring-shaped circumferential surface. Ta.

Therefore, the present invention facilitates the processing of the connecting tongue piece formed on the outer terminal, and also facilitates the assembly of the outer terminal. When connected, the outer terminal is held in a correctly positioned state, and
The purpose is to securely connect the connecting terminal piece for the outer pole on the side of the knob, and to enable easy replacement of the fuse tube.

To explain the embodiment in detail based on the drawings, 1 is an automatic power outlet plug, and the insertion main part on the front half side is made of an insulating material such as synthetic resin so that the first half and the second half can be attached and detached. 2 and a knob portion 3 on the rear half side are removably connected. The means for removably connecting the insertion body part 2 and the knob part 3 may be implemented as appropriate. In this example, a female thread part 30 is provided at the inner front end of the knob part 3, A threaded portion 20 is provided on the outer peripheral surface on the rear end side of the main body portion 2, and the threaded portions 20 and 30 are connected (connected) together by threading, and the insertion main body portion 2 is formed by releasing the threaded engagement. and the knob portion 3 are separated.

The insertion main body part 2 is provided with a shaft hole 21 for housing the fuse tube 4 in the axial center of its inner cavity, and a through hole 22 for assembling the inner terminal 5 and the through hole at the front end. A plurality of (three in this example) protrusions 23 are formed around the protrusions 22. Further, in the front of the shaft hole 21, as shown in FIG. 7, an engaging step part 24 is formed which is continuous with the through hole 22, and in the rear part, as shown in FIGS. A short U-shaped groove 25 is formed, and the rear of the shaft hole 21 is connected to the fuse pipe 4.
There is an insertion opening 21a into which the holder is inserted.

Further, an axial guide groove 26 is formed on the circumferential surface of the insertion main body 2, and the rear side (right side in FIG. 5) is open.

The inner terminal 5 is made by forming a metal plate into a dish shape as shown in FIG. A hole 5 that engages with the protrusion 23 is provided in the hole 5, and the overhang 50 is inserted into the through hole 22 while the hole 51 is engaged with the protrusion 23. It is fixed to the front end of the insertion main body part 2 by caulking from the side with a tool such as a punch and making the caulking part 52 hang over the engagement step part 24.

Reference numeral 6 designates a metal ring for an outer pole to be assembled on the outer circumferential surface of the insertion main body 2.

The metal ring 6 is a metal plate cut into a strip shape by pressing as shown in FIG. 14, and has a connecting tongue piece that connects to a terminal c formed in the socket b of the cigarette lighter B as shown in FIG. 19. A plurality of (three in this example) 61, 61, 61 are formed and bent into a cylindrical shape as shown in FIG. It bends toward the axial direction, and then bends both free ends to the left and right by 90 degrees as shown in Figure 13.
The width L thereof is approximately the same as the width l of the guide groove 26. Further, the abutting portion 62 of the metal ring 6 is, for example, as shown in FIG.
2 bent in the axial direction, or as shown in FIG. 17, the abutting portion 62 is bent in the axial direction, and both free ends are bent upward, or as shown in FIG. The abutting portion 62 may be bent in the axial direction, and both free ends may be bent at 90 degrees in the same direction, etc., as appropriate.

Reference numeral 7 denotes a core to be assembled on the front opening side of the knob portion 3, which is made of an insulating material such as synthetic resin, and into which a connecting terminal piece 8 for the outer pole and a connecting terminal piece 9 for the inner pole are assembled. It is provided with assembly holes 70 and 71, and a setting hole 75 for setting a spring 73 is formed on the front surface of the central portion. Note that 74 and 74 are relief holes for preventing distortion by making the entire wall thickness approximately the same when making the core 7 by pouring a resin material into a mold, etc. be. Moreover, the connection terminal piece 9 for the inner pole to be assembled to the core 7 is the first
As shown in Figure 0, it is made of elastic band-shaped metal plates, and one end (on the right side of the figure) is caulked with a claw 90.
The other end is bent 90 degrees toward the axis to form a bent part 92 that comes into contact with the fuse tube 4, and the core is connected with the soldering part 91 at the beginning. When inserting the spring 73 into the assembly hole 71 from the front side (left side in the drawing) of 7, set the spring 73 in the setting hole 75,
The bent portion 92 is in contact with the crimping claw 90 .
The tip of the caulking pawl 90 acts on the rear wall surface of the core 7 at a place where the core 7 protrudes from the assembly hole 71, thereby allowing the core 7 to be assembled. In addition, the connection terminal piece 8 for the outer pole is
As shown in FIG. 10, a step-like rising wall is bent and formed on the front half side (left side in the drawing) of an elastic band-like metal plate, and its tip 81 is
As shown in the figure, it is shaped like a fork that expands and contracts with a cutout groove 80 inserted therein. And the other end side (right side of the drawing)
is formed in the soldering part 83 provided with the caulking claw 82, and is inserted into the assembly hole 72 with the soldering part 83 at the beginning until the first rising wall 84 is on the front wall of the core 7. At the point where the caulking pawls 82 abut and protrude from the assembly hole 72, the tips of the caulking pawls 82 are engaged with the rear wall surface of the core 7, so that the core 7 can be assembled. The width of the tip 81 of the connection terminal piece 8 for the outer pole is approximately the same as the width of the guide groove 26 provided in the insertion main body 2 so that the metal ring 6 is butt-fitted. The part 62 is cut out by the groove 80.
They are held in close contact with each other. In this case, in the case of FIGS. 16 and 17, which are modified examples of the abutting portions 62, the abutting portions 62 are held in a state of strong contact with each other by the notch grooves 80 as in the previous embodiment. It works like this, but the first
In the case of FIG. 8, the abutting portion 62 is pressed firmly against the guide groove 26
are arranged so that they are in close contact with each other.

31 is a cord insertion opening opened at the rear of the knob 3; 32 is a circumferential groove in which the core 7 is accommodated in a loosely fitted state in the circumferential direction;
It is formed deeper than the female threaded portion 30.

Next, to explain the function and effect, the end of the cord 33 is exposed as shown in FIG.
34 and insert it through the cord insertion opening 31 of the knob part 3. At the point where the cord wires 34, 34 protrude from the front surface of the knob part 3, the inner and outer poles assembled to the core 7 are connected. After applying the cord wires 34 and 34 to the soldering parts 83 and 91 of the connection terminal pieces 8 and 9 for the poles, applying solder from above and soldering, pull the cord 33 (as indicated by the arrow in Figure 3). ) Place the core 7 into the circumferential groove 32 of the grip portion 3.

Next, align the abutting portion 62 of the metal ring 6 with the guide groove 26 of the insertion main body 2, insert the metal ring 6 fully until it hits the stepped portion 27, and then insert the fuse pipe 4 into the shaft hole 21. Set the insert. Then, the notch groove 80 of the fork part 81 on the side of the knob part 3 is
As shown in Figure 5, move the knob part 3 forward (arrow B in Figure 3) while aligning it with the abutting part 62 on the insertion main body part 2 side.
Then, the knob portion 3 is rotated and the female screw portion 30 and the male screw portion 20 are screwed together to connect the knob portion 3 integrally. In addition, when removing, rotate the knob 3 in the opposite direction from when screwed together to unscrew the female threaded part 30 and male threaded part 20, and then rotate the knob 3 backward (opposite the arrow B in Figure 3). direction), the fuse tube 4 is separated while remaining on the insertion main body 2 side as shown in FIG.

As described above, according to the present invention, the insertion main body is provided with an inner terminal for the inner pole at the front end, a shaft hole for housing the fuse tube at the shaft center of the inner cavity, and a metal ring for the outer pole on the outer peripheral surface. The front end of a knob part formed separately from the main body part is removably connected to the rear end of the part, and the inner terminal on the insertion main part side is connected to the core stored in the inner cavity of the knob part. In an automotive power outlet plug which is assembled with a removable inner terminal piece, a metal ring for the outer pole, and a removable outer contact terminal piece, the outer circumferential surface of the insertion main body has a A guide groove along the axial direction is provided,
The metal ring is formed by forming a band-shaped metal plate having a plurality of connecting tongues into a ring shape with both free ends abutted, and the abutted ends of the metal ring. Both free ends of the metal plate are formed with abutting parts that are bent in the axial direction and face into the guide groove, and the connecting terminal piece for the outer pole has a tip end that is inserted into the guide groove. Since it is shaped like a fork that expands and contracts so that the abutting parts come into close contact with each other when inserted into the guide groove, it becomes easy to process the connecting tongue piece formed on the metal ring. In addition, the metal ring can be easily assembled by inserting the abutting part along the guide groove, and the connecting terminal for the outer electrode is shaped like a fork that expands and contracts. The abutting portions are held in close contact with each other by the tip portions of the pieces, and the metal ring and the connecting terminal piece can be reliably connected. Moreover, if the connection between the insertion main body part and the knob part is released, the fuse pipe will be separated with the fuse pipe remaining on the insertion main body part side, making it easy to replace the fuse pipe.

[Brief explanation of the drawing]

FIG. 1 is a side view of an automotive power outlet plug embodying the present invention, FIG. 2 is a cutaway side view of the same as the above, and FIG. 3 is a partially cutaway side view with the insertion main part and the knob part separated. Fig. 4 is a partially cutaway side view with the core removed from the knob, Fig. 5 is a plan view of the insertion main body, Fig. 6 is a rear view of the same as above, and Fig. 7 is the 6th
8 is a plan view of the core, FIG. 9 is a rear view of the same as above, FIG. 10 is an exploded cross-sectional view of the insertion main body, metal ring, and core, and FIG. The figure shows the connection terminal piece for the outer pole, Figure 12 is a perspective view of the metal ring, Figure 13 is a front view of the same as above, Figure 14 is a developed view of the same as above, and Figure 15 is the butt part of the metal ring. FIGS. 16, 17, and 18 are perspective views before inserting the fork portion of the connecting terminal piece, and FIG. FIG. 3 is a partially cutaway view of the cigarette lighter. Explanation of drawing symbols, 1...Automotive power outlet plug, 2...Insertion main body, 3...Knob, 4...Fuse tube, 5...Inner pole terminal, 6...Metal ring for outer pole, 7... Core, 8... Connection terminal piece for the outer pole, 9... Connection terminal piece for the inner pole, 20... Male threaded part of the insertion main body, 21... Shaft hole as above, 22... …
Through hole as above, 23... Protrusion as above, 24... Engagement step portion as above, 26... Guide groove as above, 30...
Female threaded part of the knob part, 31... Cord insertion port as above, 32... Circumferential groove as above, 61... Tongue piece for connecting metal ring, 62... Butting part of metal ring,
80... Notch groove of connecting terminal piece for outer pole, 81...
Same as the tip, 82... Same as the above caulking claw, 83...
Same as above soldering part.

Claims (1)

[Claims] 1 At the rear end of the insertion main body, which has an inner terminal for the inner pole at the front end, a shaft hole for housing the fuse tube at the center of the inner bore, and a metal ring for the outer pole on the outer peripheral surface, the main body The front end of a knob formed separately from the above is removably connected, and a core housed in the inner cavity of the knob is provided with an inner terminal piece that is detachable from the inner terminal on the insertion main body side. In a power outlet plug for an automobile in which a metal ring for an outer pole and a connecting terminal piece for an outer pole that can be freely connected and separated, a guide groove is provided on the outer circumferential surface of the insertion main body portion along the axial direction, The metal ring is formed by forming a band-like metal plate having a plurality of connecting tongues into a ring shape with both free ends butted, and
Both free ends of the abutted metal plates of the metal ring are formed with abutting portions bent in the axial direction and facing into the guide groove, and the connecting terminal piece for the outer pole is provided with an abutting portion that is bent in the axial direction and faces into the guide groove. 1. A power outlet plug for an automobile, characterized in that a distal end portion to be inserted into the guide groove is formed into a fork shape that expands and contracts so that the abutting portions come into close contact with each other when inserted into the guide groove.