JPS6340032B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a method for manufacturing a multipolar coaxial plug.

As shown in FIGS. 1 and 2, the conventional multi-pole coaxial plug has a rear end portion of a tip pin 10 protruding from the rear end surface of a tip 1, and an inner end of an outer cylinder sleeve 2 which becomes a second pole. Connect the cord 3 from the tip 3a of the shielded cord 3 to the connected connection terminal 20.
The first core wire 33 and the second core wire are exposed by sequentially removing the outer skin 30, shield wire 31, and inner skin 32 in a stepwise manner.
The core wire 34 is connected, and then the connecting tube 4 made of a metal material is fitted to the outer periphery of the exposed portion of the connecting shielded cord 3 where the shielded wire 31 is exposed, and then the outer periphery of the tip 3a of the shielded cord 3 is fitted. Then, the outer cylinder sleeve 5 made of a metal material is inserted so that the inner circumferential surface of the rear end side thereof contacts the contact terminal part 40 of the connection cylinder 4, and then, these are held in this state and inserted. It is set in a mold for molding, and the synthetic resin material 6 is press-fitted into the inner cavity of the outer cylinder sleeve 2 and the outer cylinder sleeve 5, which will become the second pole, and insert molded together, and then the body 7, which will be the knob, is formed. It is assembled by molding with a synthetic resin material or by integrally molding it during insert molding with the synthetic resin material 6, but each member maintains a predetermined position when insert molding with the synthetic resin material 6. There is a problem in that it is difficult to assemble the mold, making insert molding difficult. In addition, the multi-polar coaxial plug assembled in this way is
The synthetic resin material 6 insert-molded on the outer periphery of the rear end of the tip pin 10 and the connection area of the shield cord 3 connected to the connection terminal 20 is press-fitted into the inner cavity of the outer sleeve 2 and the outer sleeve 5 set in the mold. When filling, these outer cylinder sleeves 2 and 5
Some of the air that was present in the synthetic resin material 6 remains as bubbles in the molded synthetic resin material 6, which causes the problem of deteriorating the insulation properties. This has become a major problem with microwave plugs.

The present invention has been made by focusing on the problems with such conventional means, and facilitates insert molding of the above-mentioned multipolar coaxial plug.
The aim is to propose a new means to prevent air bubbles from forming during insert molding.

In order to achieve this object, the method for manufacturing a multipolar coaxial plug according to the present invention includes a tip with a tip pin protruding from the rear end surface, and a cylindrical portion with a reduced diameter on the rear end side. A two-pole coaxial plug is formed in advance by insert-molding the arranged outer sleeve and the synthetic resin material that insulates them, and the rear end of the tip pin of the two-pole coaxial plug and the outer sleeve are inserted. Connect the first core wire and second core wire exposed by sequentially removing the outer sheath, shield wire, and inner sheath from the tip of the shield cord in a stepwise manner to the connecting terminal connected to the reduced diameter cylindrical portion, and then After fitting a connection sleeve made of a metal material with a reduced diameter on the side that envelops the shield wire to the outer periphery of the portion of the shield cord that extends from the exposed portion of the shield wire to the tip of the outer sheath, the connection sleeve and the two poles are connected to each other. A synthetic resin material is insert-molded in the shape of a shaft around the outer periphery of the connecting portion between the shield cord and the two-pole coaxial plug between the outer sleeve of the coaxial plug, and then the synthetic resin material is inserted into the shaft shape. This is characterized in that an outer sleeve made of a metal material is fitted around the outer periphery, and the rear end side of the outer sleeve is caulked and fixed to the outer peripheral surface of the connection sleeve.

Next, an example of implementation will be described in detail with reference to the drawings. In addition,
The same reference numerals in the drawings shall be used for the same constituent members.

In FIG. 3, a indicates a preformed two-pole coaxial plug, and 3 indicates a shielded cord connected to the coaxial plug a.

The two-pole coaxial plug a has a tip 1 cut out from a metal material as shown in FIG. 6, and a tip pin 1 cut out from a metal material as shown in FIG.
0 and the front end of the chip pin 10 is press-fitted into the hole 1a drilled in the rear end surface of the chip 1, and the chip 1 is removed.
The tip pin 10 is integrally connected so as to protrude rearward from the rear end surface, and then the tip pin 10
As shown in FIG. 8, an outer cylinder sleeve 2 made of a metal material and formed into a cylinder part 2a with a reduced diameter on the rear end side is arranged around the outer periphery of the sleeve 2, and in this state, it is set in a mold, and the tip pin 10 and By press-fitting a synthetic resin material W between the outer sleeve 2 and the outer sleeve 2 to insulate them, the chip 1, the chip pin 10, and the outer sleeve 2 are fixed together as shown in FIGS. 4 and 5. They are preformed into a connected configuration.

The shield cord 3 includes a first core wire 33 and a second core wire 34, each of which is a bundle of thin metal wires covered with an insulating material.
, an inner skin 32 made of a flexible insulating material such as silicone rubber that wraps around the plurality of core wires 33 and 34, a shield wire 31 that is formed by knitting thin metal wires into a cylindrical shape and wraps around the outer periphery of the inner skin 32, and the shield wire. It is usually formed with an outer skin 30 made of a flexible insulating material such as silicone rubber that wraps around the outer periphery of the wire, and its tip 3a is formed by sequentially cutting off the outer skin 30, shield wire 31, and inner skin 32 in a stepwise manner. put.

20, the shield cord 3 is attached to the outer cylindrical sleeve 2 of the two-pole coaxial plug a that has been formed in advance.
A connecting terminal for connecting the exposed core wire 33, as shown in FIGS. 9 to 12, is a cylindrical part 2 with a split 20a formed by rolling a metal plate.
A lug piece 20c is formed in a continuous shape on the rear end side of 0b, and a cleavage section 20a of the lug piece 20c is molded from a synthetic resin material W on the peripheral surface of the rear end side of the two-pole coaxial plug a. In order to fit into the guide y, the cylindrical portion 20b is fitted onto the outer periphery of the reduced diameter cylindrical portion 2a of the outer sleeve 2 of the bipolar coaxial plug a.

The exposed first and second core wires 33 and 34 of the shielded cord 3 are connected to the rear end portion of the tip pin 10 protruding toward the rear end side of the two-pole coaxial plug a and the lug piece of the connection terminal 20 described above. 20c, a connecting sleeve 8 is fitted in advance to the tip end 3a of the shielded cord 3 before performing the process of connecting the core wires 33, 34.

The connection sleeve 8 is made by cutting a metal material.
As shown in FIGS. 3 and 14, a large diameter portion 80 tightly fits into the outer periphery of the outer skin 30 of the shielded cord 3, and a small diameter portion 81 tightly fits into the outer periphery of the shield wire 31 of the shielded cord 3. are continuous in the axial direction,
and the third portion between the large diameter portion 80 and the small diameter portion 81.
As shown in the figure, the outer cylindrical sleeve 2 of the two-pole coaxial plug a has a stepped surface 82 opposite to the stepped surface 2b formed at the front end of the reduced diameter cylindrical portion 2a. Then, as shown in FIG. 3, the small diameter portion 81 surrounding the shield wire 31 is inserted into the exposed portion of the shield wire 31 and the rear end portion of the outer skin 30, and is shaped into a hexagonal shape using a jig from the outer circumferential side. Press it into place and fix it to the shield wire 31.
In this case, in order to align the exposed portion of the shield wire 31 with the small diameter portion 81 of the connection sleeve 8 that fits around the outer periphery, the shield wire 31 is cut after the connection sleeve 8 is fitted, and the shield that protrudes from the small diameter portion 81 is cut. Preferably, the wire 31 is cut to expose the endothelium 32.

After fitting the connection sleeve 8, the connection terminal 20 and Connect to the rear end of the tip pin 10.

Thus, the connected shield cord 3 and the two-pole coaxial plug a are set in a mold so that the coaxial plug a and the connecting sleeve 8 do not move, and the outer sleeve 2 of the two-pole coaxial plug a is The synthetic resin material 6 is insert-molded into the outer periphery of the connecting portion between the step surface 2b provided in the step surface 2b and the step surface 82 of the connection sleeve 8 in a shaft-like shape as shown by the chain line in FIG.

Then, the main body A of the multi-pole coaxial plug consisting of the two-pole coaxial plug a, the tip 3a of the shielding cord 3, the synthetic resin material 6, and the connection sleeve 8, which are integrally molded, is taken out of the mold and On the outer periphery of the synthetic resin material 6 formed into the shape of a shaft, a metal material is separately formed to serve as an outer pole,
The outer cylindrical sleeve 5, which has been fitted in advance on the proximal end side of the shielded cord 3, is inserted by sliding it to the main body A side of the multipolar coaxial plug. By press-fitting or crushing the portion that overlaps the outer periphery of the connecting sleeve 8 at the end), the main body portion A of the multipolar coaxial plug is connected integrally with the connecting sleeve 8 while making a conductive connection to the connecting sleeve 8. It is assembled into a multi-polar coaxial plug P as shown in FIG.

Multipolar coaxial plug P assembled in this way
The body 7 can be used as it is, or by molding a synthetic resin material to form a body 7 that will become a knob, as shown by the chain line in FIG.

In addition, in the method for manufacturing a multipolar coaxial plug according to the present invention described above, the connection sleeve 8 has a small diameter portion 8
1 may be made the same as the outer diameter of the large diameter portion 80, and the stepped surface 82 may be formed by the front end surface of the small diameter portion 81.

In addition, the means of the present invention sets a pre-molded two-pole coaxial plug a and a shielded cord 3 in a mold, and inserts molds a synthetic resin material 6 in the shape of a rod around the outer periphery of their connecting portion. When doing this, the outer cylindrical sleeve 5 is set in a mold together with the two-pole coaxial plug a and the shielded cord 3 in a position that surrounds the outer periphery of their connection portion, and the outer cylindrical sleeve 5 and Insert molding may be performed by press-filling the synthetic resin material 6 between the connecting portion and the connecting portion.

Next, the function and effect will be explained. As described above, the method for manufacturing a multipolar coaxial plug according to the present invention includes a tip 1 having a tip pin 10 protruding from the rear end surface.
A two-pole coaxial plug a is made in advance by insert molding the and outer sleeve 2 from synthetic resin material W.
The first and second core wires 33 and 34 of the shielded cord 3 are connected to the rear end of the tip pin 10 of the two-pole coaxial plug a and the outer sleeve 2, and the outer sleeve surrounds the outer periphery of the connecting portion. By connecting the sleeve 5 to the shield wire of the shield cord 3 and insert-molding the outer periphery of the connecting portion between the shield cord 3 and the two-pole coaxial plug a inside the outer cylinder sleeve 5 with a synthetic resin material 6, Since it is assembled into a multi-polar coaxial plug, it is easy to set each component into a mold, and insert molding can be performed with each component securely held in a predetermined position, and it is also possible to press-fit and fill. Since the flow path and filling portion of the synthetic resin material 6 have a simple shape, they can be molded without air bubbles and deterioration of insulation properties can be prevented.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional view of a multi-pole coaxial plug made by a conventional method, Fig. 2 is a perspective view of the above plug in an exploded state before insert molding, and Fig. 3 is a longitudinal sectional view of a multi-polar coaxial plug made by the method of the present invention. , Fig. 4 is a plan view of a pre-formed two-pole coaxial plug, Fig. 5 is a rear view of the above plug, Fig. 6 is a longitudinal cross-sectional side view of the tip of the above plug, and Fig. 7 is a tip pin of the above plug. 8 is a partially cutaway side view of the outer sleeve of the above plug, FIG. 9 is a plan view of the connection terminal of the same plug, FIG. 10 is a front view of the above terminal, and FIG. 11 is the same as above. FIG. 12 is a rear view of the same terminal, FIG. 13 is a perspective view of the rear end of the two-pole coaxial plug, FIG. 14 is a vertical side view of the connecting sleeve, and FIG. 15 is the invention of the present invention. It is an explanatory diagram for explaining the process of law. Explanation of drawing symbols, P...Multi-pole coaxial plug, a...2
Polar coaxial plug, A...Main part of multi-polar coaxial plug,
W...synthetic resin material, 1...chip, 1a...hole, 10
...Tip pin, 2...Outer sleeve, 2a...Cylinder part,
2b... Step surface, 20... Connection terminal, y... Guide, 20
a... Cleavage, 20b... Cylindrical part, 20c... Lug piece, 3
...Shield cord, 3a...Tip of cord, 30
... Outer skin, 31... Shield wire, 32... Inner skin, 33,
34... Core wire, 4... Connection tube, 40... Contact terminal part, 5
...Outer cylinder sleeve, 6...Synthetic resin material, 7...Body,
8...Connection sleeve, 80...Large diameter portion, 81...Small diameter portion, 82...Step surface.

Claims (1)

[Claims] 1 A synthetic resin is used to insulate the chip 1 with the chip pin 10 protruding from the rear end surface and the outer cylinder sleeve 2 formed into a cylindrical portion 2a with a reduced diameter on the rear end side and arranged around the chip pin 10. A two-pole coaxial plug a is formed in advance by insert molding a material W, and the two-pole coaxial plug a is connected to the rear end of the tip pin 10 and the diameter-reduced cylindrical portion 2a of the outer sleeve 2. The first core wire 33 and second core wire 34, which are exposed by sequentially removing the outer sheath 30, shield wire 31, and inner sheath 32 in a stepped manner from the tip 3a of the shielded cord 3, are connected to the terminal 20, respectively, and the shield is connected to the terminal 20. After fitting a connection sleeve 8 made of a metal material with a reduced diameter on the side that envelops the shield wire 31 to the outer periphery of the portion of the cord 3 extending from the exposed portion of the shield wire 31 to the tip of the outer skin 30,
A synthetic resin material 6 is insert-molded in the shape of a shaft on the outer periphery of the connecting portion between the shield cord 3 and the two-pole coaxial plug a between the connection sleeve 8 and the outer sleeve 2 of the two-pole coaxial plug a. Then, an outer sleeve 5 made of a metal material is fitted around the outer periphery of the shaft-shaped synthetic resin material 6, and the rear end side of the outer sleeve 5 is caulked and fixed to the outer peripheral surface of the connection sleeve 8. A method for manufacturing a multipolar coaxial plug, characterized by: