JPS5910708Y2 - 3-pole coaxial adapter plug - Google Patents

Description

[Detailed description of the invention] This invention is an improvement on the 3-pole coaxial adapter plug used when connecting non-standard plugs to the plug sockets of light electrical appliances, or when extending cord lines. It is related to.

A 3-pole coaxial adapter plug has a connecting terminal for the inner pole core rod, a connecting terminal for the inner pole sleeve, and
Since the outer pole sleeve, which becomes the outer pole, is assembled coaxially in parallel so as to be laminated in that order, there is a problem that it is difficult to reliably assemble them in an insulated state and with a single resin material. there were.

In particular, the connection terminal of the inner pole sleeve, which is the second pole, is insulated from the connection terminal of the inner pole core located inside it, and is further insulated from the outer pole sleeve when assembled. , the edge of the insulating part formed on the outside of the connecting terminal of the inner sleeve and the insulating part formed inside the inner sleeve is cut, so that the connecting terminal of the inner sleeve is One problem is that the insulating portion located on the inside becomes weakly assembled in the axial direction, and the connecting terminal of the inner sleeve becomes troublesome to assemble.

The present invention solves this problem by providing a new method that allows the connection terminal of the inner sleeve, which serves as the second pole, to be easily assembled, and the insulating part located inside the connection terminal to be firmly installed. The purpose is to raise the following questions.

In order to achieve this purpose, the three-pole coaxial adapter plug according to the present invention has an inner pole core rod, an outer pole sleeve, and an inner pole sleeve arranged in parallel in the axial direction and arranged coaxially with each other. A cylindrical part made of a resin material whose inner diameter on the rear side is larger than the inner diameter on the front half side is provided in the inner cavity of the plug part, which is assembled by shaping a resin material in an insulating state, and the large diameter of the cylindrical part is The lumen on the rear half side of the cylindrical part is shaped into a jack part into which another insertion plug B is inserted from the open opening at the rear end, and the said insertion plug B is inserted into the rear half side of the lumen of the cylindrical part. A cylindrical connecting terminal, which is equipped with a connecting piece that connects to the inner plug B and has a terminal piece that connects to the inner sleeve on the front end side, is inserted, and the terminal piece on the front end side of the connecting terminal is inserted into the cylindrical part. The above-mentioned plug is inserted forward into an axial insertion hole formed in a tunnel shape in the wall on the front half side, and is provided on the outer periphery of the plug part through a window hole provided at the front end of the insertion hole. A connection terminal connected to the inner peripheral surface of the inner sleeve and protruding into the inner cavity of the inner pole core rod at the front end of the plug portion is insulated from the cylindrical connection terminal by the inner wall surface on the front half side of the cylindrical portion. It is characterized in that it is held in this state and its rear end side is made to protrude into the inner cavity of the rear half side of the cylindrical part which becomes the jack part.

Next, an example of implementation will be described in detail with reference to the drawings.

In Fig. 1, 1 is a mold (
(not shown), and is assembled by injecting a resin material into its inner cavity.As shown in FIGS. A cylindrical part 12 made of a resin material with a large diameter is provided, and another insertion plug B is inserted into the rear half of the cylindrical part 12, which has a large diameter, using the open opening 13 at the rear end as a socket. It is shaped in the jack part.

Further, the front half side 10 of the cylindrical portion 12 having a small diameter is formed into a holding portion that holds the connection terminal 30 of the inner pole core rod 3 (chip) so as to be slidable in the axial direction. Tunnel-shaped insertion holes 14, 14 are formed in the wall portion along the axial direction, and the front end portions of the insertion holes 14, 14 are formed into window holes 15 that open in the inner wall surface of the inner pole sleeve 4. , 15.

In addition, the inner pole core rod 3 (
The connection terminal 30 of the chip) is divided into a front half 31 and a rear half 32, which are shaped like a cylindrical shaft with a flange. When doing so, it is press-fitted into the inner pole core rod 3, also serving as a support member to be assembled together so that the rear end side protrudes into the inner cavity of the plug portion 1.

Further, the rear half section 32 is integrally connected to its front end side and the rear end side of the aforementioned front half section 31 via a coil spring 33.

The coil spring 33 is densely formed with both ends having a diameter smaller than that of the connection terminal 30.
Insert through the opening 13 at the rear of the plug part 1, then insert the rear half 32 of the connecting terminal 30 all the way, and when the coil springs 33 are in close contact with each other, press further to force the fit. It has a structure that allows you to insert it and connect it with bondage.

5 is a connection terminal of the inner sleeve 4.

As shown in FIG. 8, the connection terminal 5 includes a pair of strip-shaped connection pieces for connecting to the other insertion plug B on the rear half side of a ring-shaped body 51 with a cut 50. 52.
52 are shaped so as to protrude continuously and rearward (toward the right side of the drawing).

Further, on the front end side of the body portion 51 of the connecting terminal 5, there is a pair of strip-shaped terminal pieces 53 for connecting to the inner pole sleeve 4.
．． 53 is shaped to protrude forward (to the left in the drawing).

The connection terminal is connected to the terminal piece 53 on the front end side. 5
3 first, insert it through the open opening 13 at the rear of the plug part 1, and insert the front part into the tunnel-shaped insertion holes 14, 14 in the axial direction formed in the wall of the front half side 10 of the cylindrical part 12. By inserting it toward the inner pole sleeve 4, the front end thereof is connected to the inner circumferential surface of the inner pole sleeve 4 through the window holes 15, 15, and the rear end side connecting piece 52.
52 is assembled so as to protrude from the rear half side 11 of the cylindrical portion 12.

6 is an insertion plug guide tube made of insulating material, and the front end side (9th
On the left side of the figure, there is a cutout groove 60 whose front side is open, and the width of the groove is equal to that of the connection piece 52 of the connection terminal 5. 52
It has a wider shape.

61 is a flange portion provided at the rear end of the insertion plug guide tube 6.

Further, 7 is a socket fitting connected to the rear end of the outer pole sleeve 2, which is assembled to surround the rear open opening 13 that serves as the socket of the jack part, and the inner wall surface of the socket fitting is attached to the socket fitting 7. A threaded portion 70 is provided for threading with another insertion plug B inserted therein.

The socket fitting 7 is formed separately from the outer sleeve 2, and is assembled by fitting from the front end side (left side in FIG. 4) with the threaded portion 70 at the beginning.

Next, to explain the function and effect, the three-pole coaxial adapter plug according to the present invention, which is constructed as described above, has an inner pole snub 4 which becomes the second pole of the plug part 1, and another part which is inserted into the jack part. The connection with the connection piece 52 provided on the jack part so as to come into contact with the insertion plug B of the
A cylindrical connection terminal 5 integrally connected to the plug part 1 is connected to the plug part 1.
Insert into the cylindrical part 12 made of resin material provided in the inner cavity of the
Insert the terminal piece 53 provided on the front end side of the connection terminal 5 into the tunnel-shaped insertion hole 14 provided on the front wall of the cylindrical portion 12, and then Since this is done by contacting the inner circumferential surface of the inner sleeve 4 through the window hole 15, the inner pole core rod 3 should be positioned inside the connecting terminal 5 in order to insulate it from the connecting terminal 5. The front half side of the cylindrical part 12 made of the insulating material can be formed integrally and continuously with the resin material forming the plug part 1.

Further, in order to connect the connecting terminal 5 to the sleeve 4, the terminal piece 53 is inserted into the tunnel-shaped insertion hole 14, so that the connecting terminal 5 can be assembled at the same time. It also becomes easier to assemble.

[Brief explanation of drawings]

Figure 1 is a cutaway side view of a three-pole adapter implementing this invention, Figure 2 is a partially cutaway side view of the inner pole core and connecting terminal, Figure 3 is a cutaway side view of the inner pole sleeve, Fig. 4 is a cut side view of the outer sleeve, Fig. 5 is a perspective view of a portion of the cylinder made of resin material, and Fig. 6 is a cut side view of the same as above.
7 is a sectional view taken along the line VII--VII of FIG. 6, FIG. 8 is a perspective view of the connection terminal of the inner sleeve, and FIG. 9 is a perspective view of the insertion plug guide tube. Explanation of drawing symbols, A: 3-pole adapter plug, 1: Plug section, 2: Outer sleeve, 3: Inner pole core Rod, 4...Inner pole sleeve, 5...Connection terminal, 6...Insertion plug guide tube, 10...First half side, 11...
...Late half side, 12...Cylinder part, 13...
・Open port, 14... Insertion hole, 15...
Window hole, B......Another insertion plug, 30...
・Connection terminal, 31...First half, 32...
・Late half, 33... Coil spring, 50...
... Cut, 51 ... Torso, 52 ...
Connection piece, 53... Terminal piece, 61... Flange part, 7... Socket fitting, 70...
Threaded part.

Claims (1)

[Scope of utility model registration request] The inner cavity of the plug part 1 is assembled by forming an inner pole core rod 3, an outer pole sleeve 2, and an inner pole sleeve 4 in parallel with each other in the axial direction, coaxially arranged, and insulating each other from a resin material. A cylindrical part 12 made of a resin material is provided in which the inner diameter of the rear half side 11 is larger than the inner diameter of the front half side 10. A connecting piece 52 formed into a jack portion into which another insertion plug B is inserted from the open opening 13, and connected to the insertion plug B at the rear end side within the rear half side 11 of the inner cavity of the cylindrical portion 12. A cylindrical connecting terminal 5 having a terminal piece 53 connected to the inner sleeve 4 on the front end side is inserted, and the terminal piece 53 on the front end side of the connecting terminal 5 is connected to the front half side 10 of the cylindrical part 12. Insert it forward into an axial insertion hole 14 formed in a tunnel shape in the wall of the
The inner pole core rod 3 at the front end of the plug part 1 is connected to the inner peripheral surface of the aforementioned inner pole sleeve 4 provided on the outer periphery of the plug part 1 through a window hole 15 provided at the front end portion of the insertion hole 14. The connecting terminal 30 protruding into the inner cavity of the plug portion 1 is held in a state insulated from the cylindrical connecting terminal 5 by the inner wall surface of the front half side 10 of the cylindrical portion 12, and the rear end thereof is connected to the jack portion. A coaxial adapter plug for three poles, characterized in that it projects into the inner cavity of the rear half side 11 of the cylindrical part 12.