JPH0145191B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in the method of assembling a coaxial plug.

As shown in FIGS. 1 to 5, the conventional coaxial plug has a tip 3 of a shielded cord 3 attached to the rear end of a chip pin 11 that protrudes from the rear end surface of the chip 1.
From a to its outer skin 30, shield wire 31, and inner skin 3
Core wire 33 exposed by sequentially removing 2 in a stepwise manner
are connected via the connection terminal 2, and a shield wire 3 is attached to the outer periphery of the portion of the shield cord 3 that extends from the exposed portion of the shield wire 31 to the tip of the outer cover 30.
After fitting the connection sleeve 4 made of a metal material, the diameter of the first half side 4a that envelops the outer skin 30 is reduced and the diameter of the second half side that fits on the outer periphery of the outer skin 30 is enlarged, the tip is inserted from the outer periphery of the first half side of the connection sleeve 4. A synthetic resin material 5 is insert-molded in the shape of a shaft around the outer periphery of the connecting portion between the shield cord 3 and the chip 1 between the rear end surface 10 of the chip 1 (FIG. 6), and then the synthetic resin material 5 in the shape of a shaft is An outer cylinder sleeve 6 made of a metal material is provided on the outer periphery of the sleeve 5.
The rear end side of the outer sleeve 6 is caulked to the outer peripheral surface of the rear half side 4b of the connection sleeve 4, and then the outer skin 30 of the shield cord 3 is inserted from the outer periphery of the rear end side of the outer sleeve 6. A knob part 7 is molded and assembled from a synthetic resin material in a range extending over the outer periphery of the tip part.

The conventional coaxial plug assembled in this way is molded to fill the space formed between the outer periphery of the connection part of the shielded cord 3 connected to the chip 1 and the inner circumferential surface of the outer sleeve 6. By molding the synthetic resin material 5 in advance before inserting the outer sleeve 6, there is an advantage that the synthetic resin material 5 has good insulation properties and does not contain air bubbles. The process of molding the knob part 7 out of a synthetic resin material over the outer periphery of the tip of the outer skin 30 of the shield cord 3 has to be carried out, which poses a problem in that the assembly process is troublesome.

The present invention has been made in order to solve the problem with this conventional means, and it has been made to
The synthetic resin material 5 that is molded to fill the space formed between the outer peripheral surface of the tip end portion 3a and the outer circumferential surface of the tip portion 3a can be molded as a material that does not contain air bubbles and has good insulation properties. To provide a new means that can be performed at the same time as the process of molding a knob part from a synthetic resin material in a range extending from the outer periphery of the rear end part of a cylindrical sleeve 6 to the outer periphery of the tip part of an outer skin 30 of a shield cord 3. The purpose is to

For this purpose, in the present invention, the core wire, which is exposed by sequentially removing the outer skin, shield wire, and inner skin from the tip of the shield cord in a stepwise manner, is connected to the chip pin protruding from the rear end surface of the chip. The outer periphery of the portion of the shield cord extending from the exposed portion of the shield wire to the tip of the outer sheath is made of a metal material in which the diameter of the first half that wraps around the shield wire is reduced and the diameter of the rear half that fits into the outer periphery of the outer sheath of the shield cord is enlarged. An outer cylindrical sleeve made of a metal material is placed between the outer periphery of the tip of the shielded cord, in which the connecting sleeve is fitted and the core wire is connected to the tip pin, and the outer periphery of the latter half of the connecting sleeve, on the front half side of the connecting sleeve. A through hole is made in a part facing the outer periphery of the sleeve, and the connection part of the outer cylinder sleeve is caulked to the outer peripheral surface of the rear half side of the connection sleeve, and then these are set in a mold and the outer cylinder sleeve is inserted. Filling the space between the inner circumferential surface of the cylindrical sleeve and the outer circumferential surface of the tip of the shield cord with synthetic resin material, and filling the space between the inner circumferential surface of the cylindrical sleeve and the outer circumferential surface of the tip of the shield cord, and filling the space from the outer periphery of the rear end of the outer cylindrical sleeve to the outer periphery of the tip of the outer skin of the shield cord. The present invention proposes a method for assembling a coaxial plug, which is characterized in that the coaxial plug is assembled by simultaneously molding a knob portion of a synthetic resin material onto the crossing portion.

Next, an example of implementation will be described in detail with reference to the drawings. Note that the same reference numerals in the drawings as in the conventional means are used for constituent members having the same effect.

In FIG. 8, 1 is a chip machined from a metal material, 11 is a chip pin made of a metal material that is integrally installed on the chip 1 so as to protrude from the rear end surface 10 of the chip 1, and 2 is a metal material. A connection terminal formed into a small-diameter cylindrical shape and fitted to the rear end of the tip pin 11; 3 is a core wire 33 made of a thin metal wire;
an inner skin 32 made of a flexible insulating material such as silicone rubber that wraps it; a shielded wire 31 that is made up of metal wires and wrapped around the outer periphery of the inner skin 32; and a flexible insulating material such as silicone rubber that wraps the outer periphery of the shielded wire 31. This is a shielded cord formed with an outer sheath 30, and its tip 3a has the outer sheath 30, shield wire 31, and inner sheath 32 cut in a stepwise manner, so that the shield wire 31, the inner sheath 32, and the core wire 33 are cut into steps. The images are exposed in sequence.

Reference numeral 4 denotes a connection sleeve, which includes a rear half 4b formed by cutting a metal material to have a large diameter so as to fit on the outer periphery of the outer skin 30 of the shield cord 3, and a shield exposed by cutting the outer skin 30 of the shield cord 3. The front half side 4a, which is formed to have a small diameter so as to be fitted onto the outer periphery of the wire 31, is connected in the axial direction. It is formed to have a somewhat smaller diameter than the outer diameter.

Reference numeral 6 denotes an outer cylinder sleeve made of a metal material, and as shown in FIG.
It is formed in such a length that it covers the tip of the outer sheath 30 of the shield cord 3 from a position slightly away from the rear end surface 10 of the chip 1 when the core wire 33 of the shield cord 3 is connected. The outer cylindrical sleeve 6 is formed to have an inner diameter that allows it to be inserted into and removed from the outer periphery of the rear half side 4b of the connection sleeve 4, and the thickness of the outer sleeve 6 is the same as that of the rear half side 4b of the connection sleeve 4. This approximately corresponds to the difference between the radius of the outer peripheral surface and the radius of the outer peripheral surface of the rear end of the chip 1. Further, on the rear end side of the outer sleeve 6, as shown in FIG. When the state is set, the front half side 4a of the connection sleeve 4
Through-holes 60, 60 are opened at a portion facing the outer periphery. However, when assembling coaxial plug a,
The outer cylinder sleeve 6 is inserted into the shield cord 3 in advance.

From this state, the tip end 3a of the shielded cord 3 is connected to the shielded wire 3 as shown in FIG.
1, the inner skin 32, and the core wire 33 are exposed in a stepped manner, and the connection sleeve 4 is inserted therein,
The shield cord 3 is the rear half 4b which has a larger diameter.
The shield wire 31 is fitted onto the outer periphery of the outer sheath 30 so that the smaller diameter front half side 4a covers the exposed portion of the shield wire 31.

Next, the core wire 33 protruding further from the inner skin 32 of the shielded cord 3 protruding from the front half side 4a of the connection sleeve 4 is inserted into the rear end of the connection terminal 2 fitted to the rear end of the tip pin 11, and the rear end is inserted. Connect to the tip pin 11 by pressing the part,
From this state, the outer sleeve 6, which had been fitted in advance to the outer periphery of the outer skin 30 of the shield cord 3, is inserted into the ninth
As shown by the solid line in the figure, with the front end edge slightly away from the rear end surface 10 of the chip 1, move it to a position that tightly covers the outer periphery of the tip 3a of the shield cord 3 and the connecting sleeve 4, and then of sleeve 6,
The rear end portion that overlaps the outer periphery of the rear end side 4b of the connection sleeve 4 is integrally caulked to the outer periphery of the rear end side of the connection sleeve 4.

Then, in this state, these are set in the mold B (FIG. 10), and the synthetic resin material 5 is poured into the space formed between the inner peripheral surface of the outer cylinder sleeve 6 and the tip end 3a of the shield cord 3. filling and the outer cover 3 of the shield cord 3 from the outer periphery of the rear end of the outer cylinder sleeve 6.
The molding of the knob portion 7, which is formed from a synthetic resin material over the outer periphery of the tip of the 0, is performed in the same process.

When assembling the coaxial plug A in this way, the chip 1, the shielded cord 3 to which the core wire 33 is connected, and the outer sleeve 6 that covers the outer periphery of the tip 3a of the shielded cord 3 are set in the mold B. , a synthetic resin material is poured, and the synthetic resin material is used to mold the knob portion 7 in a region extending from the outer periphery of the rear end of the outer sleeve 6 to the outer periphery of the tip end of the outer skin 30 of the shield cord 3, and When filling the space formed between the inner circumferential surface of the shield cord 3 and the outer circumferential surface of the tip 3a of the shield cord 3, the outer cylindrical sleeve 6 fills the space between its rear end and the outer skin 30 of the shield cord 3. By caulking the outer periphery of the connecting sleeve 4 fitted to the tip, it is held integrally with the shield cord 3, thereby maintaining a constant position in relation to the tip 3a of the shield cord 3 covered. to be assembled into mold B,
In the space formed between the inner peripheral surface of the outer sleeve 6 and the outer peripheral surface of the tip 3a of the shield cord 3,
As shown in FIG. 10, since there is no member for regulating the relative position between the outer sleeve 6 and the tip 3a of the shield cord 3, a member provided at the rear end side of the outer sleeve 6 is removed. The synthetic resin material 5 flows into the outer sleeve 6 from the through hole 60.
The air inside the outer cylindrical sleeve 6 is completely expelled without any resistance, and the air is filled into the outer cylindrical sleeve 6, and the inner peripheral surface of the outer cylindrical sleeve 6 and the outer periphery of the tip 3a of the shield cord 3 are The space between the surfaces can be filled and molded with a synthetic resin material 5 that does not contain air bubbles and has good insulation properties.

As explained above, in the means of the present invention,
An outer cylindrical sleeve that covers the outer periphery of the connection area between the chip pin protruding from the rear end surface of the chip and the shield cord connected to the core wire, and the outer periphery of the connection sleeve whose rear end is fitted to the tip of the outer skin of the shield cord. By caulking the surface, it is held integrally with the shield cord, and a transparent material into which the synthetic resin material flows is formed on the rear end side of the outer sleeve facing the front half side of the connecting sleeve where the diameter has been reduced. An appropriate number of holes are provided, and the space between the inner circumferential surface of the outer sleeve and the outer circumferential surface of the shield cord is filled with the synthetic resin material from the outer circumference of the rear end of the outer sleeve to the outer skin of the shield cord. Since this process is carried out at the same time as the process of molding the knob part with a synthetic resin material over the outer periphery of the tip, filling the space inside the outer sleeve with the synthetic resin material absorbs the air present in that space. Make the expulsion of the people smooth,
This space can now be filled with a bubble-free insulating material that has good insulation properties while molding the knob.

[Brief explanation of drawings]

1 to 7 are explanatory diagrams of the conventional means, and the first
The figure is a vertical side view of the chip, and Figure 2 is a vertical side view of the chip with connection terminals connected to the chip pins.
Figure 4 is a longitudinal side view of the above shielded cord with the connecting sleeve fitted, Figure 5 is a vertical side view of the shielded cord with the core wire, inner sheath, and shielded wire exposed, and Figure 6 is a side view of the shielded cord with the shielded wire exposed. Fig. 7 is a longitudinal sectional side view of the state in which the insulating material is molded with a synthetic resin material around the outer periphery of the connection part connected to the chip, Fig. 7 is a longitudinal sectional side view of the state in which the same knob part as above is molded, and Figs. 8 to 10 are FIG. 8 is a perspective view of the means of the present invention before assembly;
FIG. 9 is a vertical sectional side view of the shield cord connected to the chip pin, and FIG. 10 is an explanatory view of the shield cord set in a mold and into which the synthetic resin material is poured. Explanation of drawing symbols A... Coaxial plug, B... Mold, 1... Chip, 10... Rear end surface, 11... Chip pin, 2... Connection terminal, 3... Shield cord, 3a... Tip part, 30... Outer cover, 31... Shield wire, 32... Inner cover, 33... Core wire, 4...
Connection sleeve, 4a...first half side, 4b...second half side, 5...synthetic resin material, 6...outer cylinder sleeve, 6
0...Through hole, 7...Knob part.

Claims (1)

[Claims] 1. On the tip pin protruding from the rear end of the tip,
The outer skin, shield wire, and inner skin of the shielded cord are removed stepwise from the tip of the shield cord, and the exposed core wire is connected 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 tip of the shielded cord is fitted with a connection sleeve made of a metal material, the first half of which wraps the shielded wire is reduced in diameter and the second half of which fits around the outer periphery of the shielded cord is enlarged, and the core wire is connected to the tip pin; An outer cylindrical sleeve made of a metal material is provided at a portion extending from the outer periphery of the connection sleeve to the outer periphery of the rear half side of the connection sleeve,
A through hole is made in a portion facing the outer periphery of the first half of the connection sleeve, and the outer cylindrical sleeve is inserted into the hole, and the rear end of the outer cylindrical sleeve is caulked to the outer periphery of the second half of the connection sleeve, and then these are placed in a mold. The space between the inner circumferential surface of the outer sleeve and the outer circumferential surface of the tip of the shield cord is filled with a synthetic resin material, and the shield cord is removed from the outer circumference of the rear end of the outer sleeve. A method for assembling a coaxial plug, characterized in that the coaxial plug is assembled by simultaneously molding a knob part using a synthetic resin material over the outer periphery of the tip of the outer skin.