JPH0113628B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a connector for a low-power signal cable such as a coaxial cable or a parallel feeder, and particularly to an interrupted connector for outdoor use that requires waterproofness.

Conventionally, when relaying a feeder or coaxial cable drawn out from a television antenna, if outdoors, use a waterproof terminal box for the relay connection or apply sufficient taping to the relay connection to make it waterproof. However, terminal boxes require a fixed location, are expensive, are time-consuming to tape, and have drawbacks such as difficulty in achieving complete waterproofness.

Furthermore, conventional relay connectors for coaxial cables are machined, expensive, and heavy, so when the relay connector is suspended in the air, excessive force is applied to the cable. There is.

The present invention aims to eliminate the above-mentioned drawbacks and provide a compact, lightweight, waterproof, and low-cost relay connector. describe

A pair of coaxial cables 1 and 2 to be connected
have their cable ends 1a, 2a supported on the axes of the mouth floor parts 3a, 4a of the female and male pair of shell members 3, 4, respectively.

The female and male shell members 3 and 4 are attached to the respective oral cavity 3.
When b and 4b are faced and butted against each other, the male shell member 4 is placed on the inner periphery of the oral cavity 3b of the female shell member 3.
When the outer periphery 4c of the male shell member 4 is fitted and the fitting is made appropriately deep, the engaging protrusions 5, 5 provided on the outer periphery 4c of the male shell member 4 and the tip of the oral cavity 3b of the female shell member 3 are connected to each other. The provided radial engagement holes 6, 6 engage with each other, thereby preventing both shell members 3, 4 from coming off in the axial direction.

Note that from both sides of one end of the axis of the engagement holes 6, 6,
As shown in FIG. 2, the slots 7, 7 are arranged in series,
In order to facilitate the entry of the engaging protrusions 5, 5, notches 7, 7 are provided at key points of the shell member 3 in which the engaging holes 6, 6 are provided, forming moderately elastic pieces.

When the female and male shell members 3 and 4 are engaged, the highly elastic connection gripping member 8 made of soft rubber or soft plastic, which is fitted into the oral cavity 4b of the male shell member 4, The inner end surfaces of the shell members 3 and 4 are pressed and compressed in the axial and radial directions.

Before being compressed, the connecting portion gripping member 8 has considerably larger dimensions than when compressed, as indicated by the two-dot chain line, as shown in FIG. 4, and its compression rate is considerably high.

This connecting portion gripping member 8 has large diameter recessed holes 9 and 10 at both ends 8a and 8b, respectively, and two parallel holes penetrating from the bottom of one hole 9 to the bottom of the other hole 10. Through holes 11 and 12 are provided, and one through hole 11 passes through the axis.

The core wires of the coaxial cables 1 and 2 are inserted from both ends of the through hole 11, respectively, and the exposed electric wires 1b and 2b at the tips of the core wires 1 and 2 overlap at the center of the through hole 11.

The outer shielded wires 1c and 2c of the exposed wires 1b and 2b are twisted together to make them thinner and then inserted into the through hole 12, and their tips overlap at the center of the through hole.

The cut ends of the outer covering insulation materials 1d and 2d of the cables 1 and 2 are fitted into the recessed holes 9 and 10, respectively.

This connecting portion gripping member 8 is connected to the oral cavity 4b of the shell member 4.
When the exposed electric wires 1b, 2b and the shielded electric wires 1c, 2c are inserted into the through holes 11, 12, the through holes 11, 12 are narrowed, and the wires are overlapped in the through holes 11, 12. The exposed electric wires 1b and 2b are elastically compressed to obtain reliable electrical contact pressure.

Furthermore, the connection portion gripping member 8 is configured to hold both shell members 3 and 4.
Since the shell members 3 and 4 are also compressed in the axial direction, the tapers 3d and 4d provided at the center of the mouth floor parts 3a and 4a of both shell members 3 and 4 transfer the repulsive force in the axial direction to the periphery of the recessed holes 9 and 10. Collect and press the recessed holes 9 and 10 to remove the outer sheath insulation material 1d of the cables 1 and 2.
Increase the degree of adhesion with the cut end of 2d.

The shell members 3 and 4 are made of hard plastic material, and the cable support tubes 3e and 4e extending outward in the axial direction are provided with grooves 3f and 4f for holding the cable. The grooves 3f and 4f
Cables 1 and 2 can move freely until they are tightened.

These grooves 3f, 4f are tightened with tap screws 13 after the shell members 3, 4 are engaged and the connection of both cables 1, 2 is completed, and the cable ends 1
a, 2a are fixed to shell members 3, 4.

The cable ends 1a, 2a may be insert-molded in advance when the shell members 3, 4 are molded, as in the embodiment shown in FIG. 5, which will be described later.

In the embodiment shown in FIGS. 1 to 4 above, both ends of the coaxial cables 1 and 2 that require connection are the cut ends of the outer sheath insulation materials 1d and 2d, and the exposed wires 1b and 2b are both Since these ends are embedded in the contact gripping member 8 made of an elastic material such as compressed rubber, the airtightness and watertightness of these ends are kept extremely high.

Furthermore, the contact parts of the electric wires that require connection are pressed inside the through holes 11 and 12, where constriction force is always applied from the outside, and the through holes 11 and 12 are cut off from the outside air, so that electrical contact is not possible. The properties remain unchanged over a long period of time.

Figure 5 shows an embodiment in which a connector is pre-insert molded at the end of the cable, and shell members of the same shape can be connected to each other without the need for mutually fitting shell members. It shows.

Both shell members 23 and 24 are molded with plastic at both ends 21a and 22a of the cables 21 and 22.
Both have the same structure and are combined rotationally symmetrically in the drawing.

The shell members 23, 24 are provided with engagement protrusions 25, 26 on their outer peripheries 23c, 24c at the open ends of the oral cavities 23b, 24b, and engagement holes 27 at the tips on the outer peripheries 23c, 24c on the opposite side. , 28 are provided.

The protruding pieces 29 and 30 are respectively positioned above the mating engagement protrusions 26 and 25, and the engagement protrusions 2
5 is inserted into the engagement hole 28, and the engagement protrusion 26 is inserted into the engagement hole 27 so as to be engaged with each other, and the oral cavity opening ends of both shell members 23 and 24 are butted against each other.

In each oral cavity 23b, 24b of both shell members 23, 24, a contact portion gripping member 31 is attached to both shell members 23, 24.
4 and is fitted in a compressed state in the axial direction and in the direction perpendicular to the axial direction.

Mechanically, the contact portion gripping member 31 has compressive elasticity as in the above-described embodiment, and
Electrically, the center part is insulative, and the outer skin part is electrically conductive in the axial direction.

Specifically, an insulating core material 3 is made of a highly insulating rubber material in a cylindrical shape and has a through hole 32 on its axis.
3, and a conductive coating material 34 that covers the circumferential surface of the insulating core 33 with conductive rubber containing a large amount of conductive material such as metal powder.

The exposed electric wires 21b and 22b at the tips of the core wires of the cables 21 and 22 are inserted into the through hole 32 from both sides in an overlapping state.

The shield wires 21c and 22c are spread out radially at the cut ends of the exterior insulation coatings 21d and 22d,
Further, the shield wires 21c and 22c are provided in close contact with the bottom surfaces of the oral cavity floor parts 23a and 24a, and the shield wires 21c and 22c are in pressure contact with both ends of the conductive covering material 34.

The conductive coating material 34 has a relatively low electrical resistance even in an uncompressed state, but when it is compressed, it has the property of lowering the electrical resistance even further. It is connected reliably to the core wire and has a shielding effect on the core wire.

Cables 21, 22 to shell members 23, 24
are integrally inserted into the cable support tubes 23e and 24e, and this part has relatively high airtightness and watertightness. However, if even higher watertightness is desired, the sealing O-ring 35 can be inserted into the cable end. Part 21
What is necessary is to wind it around a and 22a and perform insert molding.

In addition, 36 is a retaining ring to prevent it from coming off.

In this embodiment as well, the oral cavity abutting portions of the shell members 23 and 24 are sealed by the elastic conductive covering 34, and the core wire is also reliably sealed.
Highly airtight and watertight.

In addition, this embodiment can connect items of the same shape without specifying the structure of the connecting partner, so it is ideal for an extension processed cable made by insert-molding a connector in advance.

As described above, according to the present invention, the electrical connection can be maintained using an elastic material with a high sealing effect without using a metal material in the electrical connection part, and the shell member can be made by plastic molding. It is small, lightweight, and highly waterproof.Furthermore, the conductive exposed parts that require connection are buried in highly airtight elastic material that is constantly pressurized, reducing the area that comes into contact with the air. Since the amount of air remaining in the contact area is small and there is no exchange of air, there is very little change in electrical resistance over time due to oxidation of the contact area.
A highly reliable connector is obtained.

[Brief explanation of drawings]

The figures show an embodiment of the connector according to the present invention, and FIG. 1 is a central vertical sectional front view of the first embodiment;
2 is a plan view, FIG. 3 is a cross-sectional side view taken along the line A--A in FIG. 1, and FIG. FIG. 5 is a central longitudinal sectional front view of the second embodiment. 1, 2, 21, 22...cable, 1a, 2a,
21a, 22a...cable end, 1b, 2b, 2
1b, 22b...Exposed electric wire, 1c, 2c, 21c,
22c...shielded wire, 1d, 2d, 21d, 2
2d... Exterior covering insulating material, 3, 4, 23, 24... Shell member, 3a, 4a, 23a, 24a... Floor of oral cavity,
3b, 4b, 23b, 24b...oral cavity, 4c, 23
c, 24c... Shell outer periphery, 3d, 4d... Taper, 3
e, 4e... Cable support tube, 3f, 4f... Division groove, 5, 25, 26... Engagement protrusion, 6, 27, 28
...Engagement hole, 7...Notch, 8, 31...Connection part gripping member, 8a, 8b...both ends, 9, 10...hole, 11, 1
2, 32...Through hole, 13...Tap screw, 33...Insulating core material, 34...Conductive coating material, 35...O ring, 3
6...Retaining ring.

Claims (1)

[Claims] 1. The ends of a pair of cables to be connected,
A pair of shell members each supported on the axis of the floor of the oral cavity and capable of engaging with each other in the axial direction when the oral cavities of both shells face each other and abut against each other; and at least one of the shell members. It is elastically compressed and fits into one oral cavity in a direction perpendicular to the axial direction, and is elastically compressed in the axial direction when both shell members are engaged in the axial direction, and requires connection. The wire connection part of the cable that is
A cable connector characterized by comprising an insulating and elastic connection part gripping member which is inserted through the ends of both connection parts crossing each other and has an appropriate number of through holes whose diameter narrows when the cable is compressed. . 2. A pair of shell members is characterized in that the other shell member is fitted into the oral cavity of the other shell member and engaged in the axial direction, and the contact portion gripping member is compression-fitted into the oral cavity of the inner shell member. A cable connector according to claim 1. 3. A pair of shell members have the same structure so that they can be engaged in the axial direction, and a contact portion gripping member is stretched over and compressed into each oral cavity of both shell members. Claim 1:
Cable connectors listed in section. 4. The cable connector according to any one of claims 1 to 3, wherein the center portion or the entire contact portion gripping member is made of soft rubber. 5. The cable connector according to any one of claims 1 to 3, wherein the center portion or the entire contact portion gripping member is made of soft plastic. 6. According to any one of claims 1 to 5, wherein holes are provided at both ends of the through hole in the contact portion gripping member, into which the cut ends of the outer insulation coating of the cable fit. cable connector. 7 The center part of the contact gripping member is made of an insulating material,
6. The cable connector according to claim 1, wherein the surface thereof is electrically conductive. 8. The cable connector according to claim 1, wherein the shell member has a tapered mouth floor. 9. The cable connector according to claim 1, wherein the cable supported on the axis of the shell member is screwed. 10 A cable supported on the axis of the shell member,
The cable connector according to claim 1, wherein the cable connector is integrally molded and fixed when the shell member is molded.