JP2955553B1 - Coaxial connector - Google Patents

Abstract

Abstract: PROBLEM TO BE SOLVED: To reduce a coaxial cable peeling operation and a crimping portion thereof, and at the time of fitting with a socket connector,
While the crimped portion of the coaxial cable in the plug connector is double shielded, if the coaxial cable is twisted, the plug connector can be rotated 90 degrees in the torsion direction and fitted and fixed. Is to provide things. SOLUTION: A plug terminal 20 having a male contact portion 21 at a front end portion, a plug insulator 26 for fixing a rear portion of the plug terminal, and a core wire of a coaxial cable 15 protruding from a front end through the inside of the plug insulator. 18
Core wire crimping portion 2 provided behind said male contact portion for crimping
2, plug insulator crimping part 33, conductor crimping part 3
4 and a cable crimping device 32 having a jacket 36
And a plug housing 39 for accommodating them.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shielded cable for signal transmission, and more particularly to a coaxial cable connector most suitable for high-frequency transmission.

[0002]

2. Description of the Related Art Most of conventional coaxial connectors of this type, particularly plug connectors, have been formed by machining with a metal material in consideration of the coaxial shape, but in order to improve production efficiency. In recent years, for example,
As disclosed in Japanese Unexamined Patent Publication No. 8, various coaxial connectors formed by press working have been developed.

[0003]

However, a conventional coaxial connector formed by press working, more specifically, a plug connector has a part that cannot be shielded due to crimping (plug crimping part). Poor, because the plug connector and the socket connector have a fixed fitting position, if the coaxial cable is twisted and the plug connector is fitted to the socket connector in this state, the male contact of the plug terminal In the female contact portion of the socket connector, the twist is restored and the connector rotates.

For this reason, abrasion occurs at the male contact portion and the female contact portion, adversely affecting the contact portion, and also has a problem in durability. The coaxial cable on the plug connector side has a core wire and an inner coating. In addition, it is necessary to perform a stripping operation to expose the outer conductors, respectively, and it is necessary to crimp all of the core wire, the inner sheath, the outer conductor and the outer sheath. The connecting portion between the plug terminal and the plug terminal is structurally weak because of the small size, and there are problems that the connecting portion is bent or damaged when the male contact portion is frictionally inserted into the female contact portion. .

[0005]

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned conventional problems. The present invention reduces the work of peeling off a coaxial cable and the number of crimped portions thereof, and reduces the number of joints between a socket connector and a socket connector. When the coaxial cable is twisted while the crimped portion of the coaxial cable in the plug connector is double-shielded at the time of mating, the plug connector is rotated by 90 degrees in the torsion direction and fitted. The purpose is to provide something that can be fixed.

In order to achieve the above object, the present invention provides a plug terminal having a male contact portion at a tip, a plug insulator for inserting and fixing a rear portion of the plug terminal, and a plug insulator. A core wire crimping portion provided behind the male contact portion for crimping a core wire of a coaxial cable protruding from its front end through the inside, and a plug for crimping and fixing the plug insulator, the outer conductor and the outer coating of the coaxial cable, respectively. A cable crimping device including an insulator crimping portion, a conductor crimping portion, and an outer coating crimping portion, and a plug housing for accommodating the cable crimping portion. Forming an extended portion projecting rearward from the end face, the inner coating and the outer Has its gist the coaxial connector, wherein the front end of the conductor is configured as the plug connector to the rear end surface abutting said plug insulator.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to an embodiment shown in the drawings. In the drawings, reference numeral 15 denotes a coaxial cable, and the coaxial cable 15 has an outer sheath 17 as shown in FIG. The outer conductor 19 is peeled off, and the outer conductor 19 and the inner coating 16 are peeled together at the tip to expose the core wires 18 respectively. However, it is necessary to peel the outer conductor 19 to expose the inner coating 16. There is no.
Thereby, one process at the time of the stripping operation of the coaxial cable 15 can be saved. In the drawings, a part of the inner coating 16 is exposed for convenience of explanation.

Reference numeral 20 denotes a plug terminal, as shown in FIG.
A male contact portion 21 formed into a cylindrical shape by a metal plate having an elastic force, a U-shaped core wire crimping portion 22 for crimping the core wire 18 of the coaxial cable 15, and a flat plate 23 b from both side edges of the arc portion 23 a are respectively formed. A rotation restricting portion 23 having a shape connected to the outside in a horizontal state, and an arm portion 24 extending left and right
And the band plate portion 25 are provided in a tandem state.

Reference numeral 26 denotes a cylindrical plug insulator formed of an insulator. As shown in FIG. 4, a flange portion 28 is connected to the tip of a cylindrical portion 27.
In the inside, from the front surface to the rear surface of the flange portion 28, storage holes 29 for storing the rotation restricting portion 23 of the plug terminal 20, the arm portion 24, and the band plate portion 25 are formed in a continuous state.

Reference numeral 30 denotes a V-shaped groove which opens along the generatrix direction at the upper part of the outer periphery of the plug insulator 26. The bottom of the V-shaped groove 30 having the same size as the width of the band plate portion 25 is formed in the storage hole 29. It is continuous with the upper center. Reference numeral 31 denotes locking projections, which are provided on both sides of the outer periphery of the columnar portion 27 at substantially the center in the longitudinal direction. The outer diameter of the cylindrical portion 27 of the plug insulator 26 is the same as that of the coaxial cable 1.
5 is set to be considerably larger than the outer diameter of the outer coating 17.

In the plug terminal 20, the rotation restricting portion 23, the arm portion 24, and the band plate portion 25 are inserted into the housing holes 29 of the plug insulator 26 from the flange portion 28 side, respectively. The male contact portion 21 and the core wire crimping portion 22 are mounted so as to protrude from the front surface of the flange portion 28.

Thus, the plug terminal 20 is connected to the plug insulator 26 by the flat plate 2 of the rotation restricting portion 23.
3b and the arm portion 24 extending left and right are housed in a non-rotatable manner and are firmly fixed. The core wire 18 of the coaxial cable 15 is connected to the V-shaped groove 3 of the plug insulator 26.
0 and is crimped and fixed by the core wire crimping portion 22 of the plug terminal 20. At this time, the ends of the inner sheath 16 and the outer conductor 19 of the coaxial cable 15 are in contact with the rear surface of the plug insulator 26, and the plug terminal 20 and the plug insulator 26 are formed as shown in FIGS. .

Numeral 32 denotes a metal cable crimping element, as shown in FIG.
7 and a pair of front and rear plug insulator crimping portions 33, 33 corresponding to the outer conductor 19 of the coaxial cable 15 and a U-shaped conductor crimping portion 34 corresponding to the outer conductor 19 of the coaxial cable 15. A stopper 35 and a U-shaped outer jacket crimping section 36 corresponding to the outer jacket 17 of the coaxial cable 15
Are provided in tandem, and the cable crimping element 32 has an inner coating 1 of the coaxial cable 15.
No crimping part for crimping 6 is provided. In addition, 3 in the figure
Reference numeral 7 denotes a locking portion protruding from the lower surface of the cable crimp 32.

Therefore, the front and rear insulator crimping portions 33 are respectively wound around and fixed to the cylindrical portion 27 of the plug insulator 26. Since the cylindrical portion 27 has a large diameter, the fixing strength is very strong. At this time, as shown in FIG. 2 and FIG. 3, an extension is formed at the rear end of the rear insulator crimping portion 33 so as to extend slightly rearward from the rear surface of the cylindrical portion 27 of the plug insulator 26. Since the tip portions of the inner covering 16 and the outer conductor 19 are located in the extension portion, the tip portions are shielded by the rear insulator crimping portion 33.

The conductor crimping part 34 of the cable crimping element 32 is wound around the outer conductor 19 of the coaxial cable 15 and the outer sheath crimping part 36 is wound around the outer sheath 17 and fixed by crimping. The state shown in FIG. When the front and rear insulator crimping portions 33 are wound around and fixed to the cylindrical portion 27 of the plug insulator 26, the locking projections 31 on the outer periphery of the cylindrical portion 27 are, as shown in FIG. 33, 33, so that the plug insulator 2
6 is restricted from moving back and forth with respect to the cable crimp 32. The locking portion 35 of the cable crimp 32 remains in a U-shape.

Reference numeral 39 denotes a plug connector, and at least an insertion portion 38a in the front half of a rectangular parallelepiped plug housing 38 constituting the plug connector 39 is formed in a square shape when viewed from the front. Then, as shown in FIG. 11, among the plug components (the plug terminal 20, the plug insulator 26, and the cable crimp 32 connected to the coaxial cable 15) inserted into the plug housing 38.
The upper portion of the rear end of the rear insulator crimping portion 33 is locked by the front end of the locking arm 40 in the plug housing 38 to restrict the retreat, and the front end of the locking portion 35 contacts the rear end of the locking arm 40. Contact is regulated in advance. In the drawing, reference numeral 41 denotes a locking plate.

Reference numeral 43 denotes a socket connector. An insertion opening 44 on the front surface of the socket housing 42 constituting the socket connector 43 is provided with an insertion portion 38a of the plug connector 39.
Is a square configuration capable of accepting. Therefore, the insertion portion 38a of the plug connector 39 is configured to be able to be inserted into and removed from the socket connector 43 even when rotated by 90 degrees in a direction orthogonal to the longitudinal direction.

Reference numeral 45 denotes an insulating cylinder portion of the socket housing 42. As shown in FIGS. 7, 10 and 11, the insulating cylinder portion 45 makes electrical contact with the male contact portion 21 of the plug terminal 20. A cylindrical socket insulator 47 containing a female contact portion 46 and a cylindrical socket shield 4 fitted around the outer periphery of the socket insulator 47.
And a contact piece 48a that contacts the outer peripheral surface of the front insulator crimping portion 33 is provided above and below the distal end portion of the socket shield 48.

Reference numeral 49 denotes a connection terminal of the female contact portion 46;
Reference numeral 0 denotes a connection terminal of the socket shield 48, and reference numeral 51 denotes locking projections protruding from left and right side surfaces of the insertion portion 38a of the plug housing 38. Reference numerals 52 and 53 denote locking holes. Both of the locking holes are freely engageable with the locking projections 51 so that the left and right side walls and the upper and lower walls of the insertion opening 44 of the socket housing 42 can be engaged. , Respectively.

When the insertion portion 38a of the plug connector 39 is inserted into the insertion opening 44 of the socket connector 43 to a predetermined position as shown in FIGS. 51 is locked in the locking holes 52 in the left and right side walls of the socket housing 42 and is fixed so that it cannot be pulled out. And the plug connector 3
Nine male contact portions 21 electrically contact the female contact portions 46 of the socket connector 43 and are electrically connected to the core wire 18 of the coaxial cable 15.

The socket shield 4 of the socket connector 43 is provided on the outer peripheral surface of the front insulator crimping portion 33 of the cable crimping member 32 in the plug connector 39.
8 contact pieces 48a are in contact with and electrically connected to the outer conductor 19 of the coaxial cable 15. At this time, the core wire 18 and the outer conductor 19 of the coaxial cable 15 are doubly shielded by the insulator crimping portions 33, 33 before and after the cable crimping element 32 and the socket shield 48.

Here, when the coaxial cable 15 is twisted in either direction with respect to the socket connector 43, the plug connector 39 is not forcibly returned to the above-described inserted state without forcibly returning to the above-described inserted state. As shown in (1), the plug connector 39 is rotated by 90 degrees in the torsion direction of the coaxial cable and inserted into the socket connector 43, so that the plug connector 39 can be smoothly inserted, and the electrical connection is made in the same manner as described above.

[0023]

As described above, the coaxial connector according to the present invention has the above-described configuration, and (1) the peeling operation for exposing the inner coating of the coaxial cable and the crimping operation of the cable crimp to the inner coating can be omitted. In addition, the work efficiency for connecting the coaxial cable and the plug terminal is greatly improved.
(2) The rear end of the plug terminal is fixed to the plug insulator so that it cannot rotate, and the plug insulator is fixed by crimping with a cable crimp, and has an integral structure with the coaxial cable. Therefore, the structural strength becomes strong, and the durability is improved. (3) When the inner covering of the coaxial cable and the tip of the outer conductor are located in the extension formed at the rear end of the rear insulator crimping portion, the rear insulator crimping portion is fitted to the socket shield in the socket connector. Therefore, the shield is doubled, and the shielding effect of the outer conductor is improved. (4) Since the core wire of the coaxial cable is fitted to the cylindrical socket shield in the socket connector, the shielding effect of the core wire crimping part is also improved. (5)
A rotation restricting part is provided at the part of the plug terminal that is inserted and fixed in the plug insulator, so that the plug terminal does not rotate carelessly with respect to the plug insulator. And the connecting portion with the resin is strengthened, and the durability is improved. (6) The plug connector is rotated 90 degrees with respect to the socket connector, so that the plug connector can be fitted and fixed. Therefore, even when the coaxial cable of the plug connector is twisted at the time of fitting, the plug connector is rotated 90 degrees in the twisting direction. By doing so, twisting can be eliminated, and various effects such as abrasion and deterioration of both male and female contact portions can be prevented.

[Brief description of the drawings]

FIG. 1 is a front view of a plug connector of a coaxial connector according to the present invention.

FIG. 2 is a plan view of the plug connector.

FIG. 3 is a longitudinal sectional view of the plug connector.

FIG. 4 is an exploded perspective view of the plug connector.

FIG. 5 is a plan view of the plug connector without a cable crimp.

FIG. 6 is a left side view of FIG. 5;

FIG. 7 is a perspective view of a plug connector and a socket connector before fitting.

FIG. 8 is a front view at the time of the fitting.

FIG. 9 is a plan view of FIG.

FIG. 10 is an enlarged sectional view taken along line II-II of FIG.

FIG. 11 is an enlarged sectional view taken along line II-II of FIG. 9;

FIG. 12 is a plan view of the plug connector and the socket connector when they are fitted differently.

FIG. 13 is a front view of the same.

[Explanation of symbols]

 15 Coaxial cable 16 Inner sheath 17 Outer sheath 18 Core wire 19 Outer conductor 20 Plug terminal 21 Male contact part 22 Core wire crimping part 26 Plug insulator 32 Cable crimping element 33 Plug insulator crimping part 34 Conductor crimping part 36 Outer sheath crimping part 38 Plug housing 39 Plug Connector 42 Socket Housing 43 Socket Connector 46 Female Contact 48 Socket Shield

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-54-43593 (JP, A) JP-A-9-17247 (JP, A) Fully open 61-24983 (JP, U) Really open Showa 59- 95585 (JP, U) JP-A 51-26489 (JP, U) JP-A 63-18748 (JP, U) JP 4-55428 (JP, Y2) JP-B 41-17257 (JP, B1) (58) Field surveyed (Int.Cl. ⁶ , DB name) H01R 17/04 H01R 13/648 H01R 9/05

Claims (2)

(57) [Claims] 1. A plug terminal having a male contact portion at a distal end, a plug insulator for inserting and fixing a rear portion of the plug terminal, and a core wire of a coaxial cable protruding from a front end of the plug insulator through the inside of the plug insulator. A core wire crimping portion provided behind the male contact portion for crimping, a plug insulator crimping portion for crimping and fixing the plug insulator, the outer conductor and the outer coating of the coaxial cable, respectively.
A cable crimping device provided with a conductor crimping portion and an outer coating crimping portion, respectively, and a plug housing for accommodating the cable crimping portion and the plug crimping portion provided on the cable crimping device. A coaxial connector characterized by being a plug connector having a structure in which a protruding extending portion is formed and wherein an inner coating of the coaxial cable and a front end of an outer conductor are in contact with a rear end surface of the plug insulator. 2. The coaxial connector according to claim 1, wherein said plug connector is adapted to be inserted and withdrawn and fixed while being rotated by 90 degrees with respect to said socket connector.