JPH1126063A - Electrical connector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the deterioration of connection performance due to powder generated by friction of metal parts. SOLUTION: This connector comprises a front body part 10, a rear body part 30, and a clamp 40. The front body part 10 includes an inner contact part 11 to connect the center conductor C1 of a cable C through an insulator body 12 and also includes an outer contact part 12 in continuity with an outer conductor C2, the rear body part 30 is attached to the rear end side of the front body part 10 by screwing and has an insertion hole for inserting a cable into, and the clamp 40 is housed in the inner housing part 32 of the rear body part, while a circular front end part 41 of the clamp 40 being brought into contact with an inner rear end part 14 side of the front body part and an outer contact part 12 being installed in the elastic part extended from the front end part 41 towards the rear side. A circular recessed part 16 is provided in the inner rear end part 14 side of the front body part 10, a circular projected slide part is provided in the front end side of the circular front end part of the clamp 40, and the slide part is brought into contact with a part of the circular recessed part 16 side to take a powder generated by friction into the remaining space, which is used as a storage part for the powder generated by friction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrical connector for preventing a decrease in connection performance due to abrasion powder of a metal part generated during assembly and use.

[0002]

2. Description of the Related Art For example, in a signal cable for an antenna, there is a cable in which a spiral outer conductor is incorporated around a center conductor via an insulator. Such a cable C is connected to an electrical connector 1 as shown in FIGS. 4 and 5, for example, and the electrical connector 1 is attached to a counterpart electrical connector attached to a desired electronic device. It has become.

In the electrical connector 1, an internal contact portion 11 of a metal rod-shaped body (a metal cylindrical body is also possible) to which the center conductor C1 of the cable C is connected is built in via a ring-shaped insulator 12. In addition, a front body portion 10 of a metal cylindrical body in which an external contact portion 13 of a metal elastic cylindrical body that is electrically connected to the external conductor C2 is incorporated, and a front end side of the front body portion 10 is connected via a connecting member 21. A rotatable metal nut-shaped coupling (connection operating portion) 20 and an insertion hole which is screwed to the rear end of the front body 10 and into which the cable C is inserted. A rear body portion 30 of a metal cylindrical body having an opening 31
And a female screw portion 4 inside a plurality of elastic portions 42 extending rearward from the annular front end portion 41 while the annular front end portion 41 abuts on the inner rear end portion 14 side of the front body portion 10.
A main component such as a metal clamp 40 housed in the internal housing portion 32 of the rear body portion 30 with the outer conductor C2 of the cable C mounted on 2a.

[0004] When attaching the cable C,
First, squeeze it into the desired shape.
And a clamp 40 is attached to the outer periphery of the spiral-shaped outer conductor C2 protruding to the opposite side. In this state, the cable C is pulled back to the rear of the rear body portion 30, and the clamp 40 is connected to the rear body portion. The cable C is housed in the internal housing portion 32, and the outer sheath C3 of the cable C is brought into close contact with a sealing material 50 such as an O-ring mounted inside the insertion hole 31 near the rear end. The sealing material 50 makes the space between the cable C and the rear body 30 waterproof.

Next, in this state, the front body portion 10 is inserted into the external thread portion 33 on the outer periphery of the front end side of the rear body portion 30.
The female screw part 15 on the inner circumference of the rear end side is screwed. As a result, the center conductor C1 protruding from the annular front end portion 41 of the clamp 40 is fitted into the mounting hole 11a on the rear end side of the internal contact portion 11, and the outer periphery of the rear body portion 30 and the front body portion 10 Since the sealing material 50 such as an O-ring is interposed on the inner circumference at the rear end side, the space between the rear body portion 30 and the front body portion 10 is waterproofed.

Thus, the center conductor C1 of the cable C
Is electrically connected directly to the internal contact portion 11, while the external conductor C2 is electrically connected to the external contact portion 13 through the clamp 40 and the front body portion 10. Further, by rotating the coupling 20 and screwing the female screw portion 22 inside thereof into a predetermined male screw portion of the mating electric connector, the tip of the mating electric connector becomes an internal gasket. And the like.

[0007]

However, at the time of assembling as described above, or at the time of subsequent use, the rear body portion 3 is required.
When the front body part 10 is relatively rotated with respect to 0 and screwed, the front end face 43 of the annular front end part 41 of the clamp 40 and the end face of the inner rear end part 14 of the front body part 10 are in sliding contact. Abrasion powder, such as metal, enters the space R inside the front body 10 due to friction at that time, and accumulates, which may cause poor contact.

The present invention has been made to solve such a problem, and basically has an electric structure having a structure for preventing wear powder such as metal from entering an inner space portion of a front body portion. No connector is provided.

[0009]

According to a first aspect of the present invention, there is provided an electric connector to which a cable having an outer conductor incorporated on an outer periphery of a center conductor via an insulator is connected. The internal contact portion to which the external body is connected is built in via an insulator, and a front body portion in which an external contact portion which is electrically connected to the external conductor is built in, and is screwed to a rear end side of the front body portion. A rear body portion having an insertion hole into which the cable is inserted at the rear end portion, and an annular front end portion abutting against an inner rear end portion of the front body portion and extending rearward from the annular front end portion. A clamp housed in an internal housing portion of the rear body portion with an outer conductor of the cable attached to an elastic portion. An annular recess is provided on the inner rear end of the clamp, and an annular sliding contact is provided on the front end face of the annular front end of the clamp, and the annular sliding contact is applied to a part of the annular recess. The electrical connector is characterized in that the electrical connector is brought into contact with the remaining space as a storage portion for abrasion powder.

According to a second aspect of the present invention, a gap is provided between a center side end face of the front body on the inner rear end side and a center side end face of the annular front end of the clamp. The electrical connector according to claim 1, wherein

[0011]

1 to 3 show one embodiment of an electric connector according to the present invention. The electric connector 1A has basically the same structure as the electric connector 1 shown in FIGS.
4 and 5 have the same reference numerals.

In this electrical connector 1A, as is apparent from FIGS. 2 and 3, an annular concave portion 16 is provided on the inner rear end portion 14 side of the front body portion 10 and the clamp 4 is provided.
The annular protruding sliding contact portion 4 is provided on the front end face 43 side of the
4, the annular projecting sliding contact portion 44 is brought into contact with a part of the annular concave portion 16 side, and the remaining remaining space is used as a storage portion R1 for abrasion powder. A minute gap δ is provided between the center end surface portion 17 on the inner rear end portion 14 side and the center end surface portion 45 of the annular front end portion 41 of the clamp 40. The width of the gap δ may be appropriately designed in consideration of the fact that the abrasion powder does not fall from the storage portion R1, the wear of the annular projecting sliding contact portion 44, and the fitting of the clamp 40 to the front body portion 10. , 0.01-0.1
It is set to about 1 mm.

Therefore, when the front body portion 10 is relatively rotated with respect to the rear body portion 30 and screwed to the rear body portion 30 during assembly or subsequent use, the front body portion 10 and the clamp 40 come into contact with each other. Part,
Annular recess 16 of front body 10 and clamp 4
In this case, even if abrasion powder such as metal is generated due to the rotational friction in these portions, the dust is only stored in the inner storage portion R1, and the inner space R of the front body portion 10 is not changed. It hardly penetrates into parts.

The reason that the abrasion powder does not easily enter the inside space R of the front body portion 10 from the storage portion R1 (that is, does not leak) is as described above.
Of the center side end face 17 on the side of the inner rear end 14 and the clamp 40
The gap δ between the annular front end portion 41 and the center side end surface portion 45 is
This is because the width is set extremely narrow as the range of 0.01 to 0.03 mm.

Because of this, the electrical connector 1
In the case A, the cause such as poor contact caused by the abrasion powder is fundamentally eliminated, and good electrical connection performance can be obtained.

In the present embodiment, the coupling 20 is rotatably mounted on the front body portion 10. However, the present invention is not limited to this. Of course, the present invention can also be applied to a case where the front body portion 10 is inserted into a mating electrical connector and mounted.

[0017]

As is apparent from the above description, according to the electric connector of the present invention, the annular concave portion is provided on the inner rear end side of the front body portion, and the annular concave portion is provided on the front end surface side of the annular front end portion of the clamp. An annular projecting sliding contact portion is provided, and the annular projecting sliding contact portion is brought into contact with a part of the annular concave portion side, and the remaining remaining space is used as a storage portion for abrasion powder. Even if abrasion powder such as metal is generated, it hardly penetrates into the inner space portion, and it is possible to effectively prevent adverse effects on the conductor side.

The gap between the center end face on the inner rear end side of the front body and the center end face of the annular front end of the clamp is set in the range of 0.01 to 0.03 mm. The extremely narrow gap can effectively prevent wear powder such as metal from entering the inner space of the front body.

[Brief description of the drawings]

FIG. 1 is a partial vertical sectional side view showing an example of an electrical connector according to the present invention.

FIG. 2 is a partially enlarged longitudinal sectional side view of the electrical connector of FIG. 1;

FIG. 3 is an enlarged perspective view of a clamp in the electric connector according to the present invention.

FIG. 4 is a partial vertical sectional side view of a conventional electrical connector.

FIG. 5 is an exploded side view of a conventional electrical connector.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1A Electrical connector 10 Front body 11 Internal contact part 12 Ring-shaped insulator 13 External contact part 15 Female screw part 16 Annular concave part 17 Center side end face part 20 Coupling (connection operation part) 21 Connection member 22 Female screw part 23 Elasticity Member 30 Rear body part 31 Insertion hole 32 Internal storage part 33 Male screw part 40 Clamp 41 Annular front end part 42 Elastic part 42a Female screw part 43 Front end face 44 Annular sliding contact part 45 Center end face part 50 Seal material C Cable C1 Center Conductor C2 Outer conductor C3 Outer skin R Space R1 Reservoir δ Gap

Claims (2)

[Claims] 1. An electrical connector to which a cable having an outer conductor incorporated on an outer periphery of a center conductor via an insulator is connected, wherein an inner contact portion to which the center conductor of the cable is connected is provided via an insulator. A front body portion having a built-in external contact portion that is electrically connected to the external conductor, and an insertion screwed into a rear end portion of the front body portion and the cable inserted into the rear end portion; A shape in which an outer conductor of the cable is mounted on a rear body portion having a hole, an annular front end portion abutting on an inner rear end side of the front body portion, and an elastic portion extending rearward from the annular front end portion. An electrical connector comprising a clamp housed in the internal housing of the rear body, wherein an annular recess is provided on the inner rear end side of the front body. An annular projecting sliding contact portion is provided on the front end face side of the annular front end portion of the clamp, and the annular projecting sliding contact portion is brought into contact with a part of the annular concave portion side, and the remaining remaining space is used for abrasion powder. An electrical connector comprising a storage section. 2. A gap is provided between a center-side end surface of an inner rear end of the front body portion and a center-side end surface of an annular front end of the clamp. Electrical connector.