JP3056591B2 - Cable connector with pull-out prevention mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cable connector structure in which a contact connected to a cable such as a coaxial cable is inserted and fixed in a housing of the cable connector.

[0002] A cable connector to which a plurality of coaxial cables are fixed is fitted to, for example, a connector mounted on a back wiring board, so that the coaxial cable and the back wiring board are electrically connected.

In such a cable connector, there is a need for a cable connector structure in which a contact inserted and fixed in a housing does not come out of the housing even when a rotational external force is applied to the cable.

[0004]

FIG. 8 is a perspective view of a set of connectors to which the present invention is applied. Reference numeral 2 denotes a cable connector, which is formed by inserting and fixing a plurality of external contacts 8 connected to the outer conductor of the coaxial cable 6 into a plurality of holes formed in the housing 4. The center conductor of the coaxial cable 6 is connected to a center contact (not shown) housed in the external contact 8 via an insulator.

Reference numeral 12 denotes the back wiring board 10
The connector has a plurality of fitting holes 14 into which the external contacts 8 of the cable connector 2 are fitted. A center contact and an external contact (not shown) are provided in each fitting hole 14, and these contacts are connected to the central contact and the external contact 8 (not shown) of the cable connector 2.

When the cable connector 2 is fitted to the connector 12, the center contacts and the external contacts provided on each connector are connected, and the coaxial cable 6 is electrically connected to the back wiring board 10.

Referring to FIG. 9, there is shown a perspective view of a conventional external contact. The open barrel 8 a of the external contact 8 is fixed by caulking to the outer conductor 6 a and the coating of the coaxial cable 6, and the cylindrical external contact 8 is attached to the tip of the coaxial cable 6.

As best shown in FIG. 10, the external contact 8 is integrally provided with a pair of cut-and-raised rectangular tongues 16. FIG. 11A is a cross-sectional view showing a state in which such a conventional external contact 8 is inserted into the housing 4 of the cable connector.
FIG. 1 (B) shows a view in the direction of arrow B in FIG. 11 (A).

The external contact 8 fixed to the end of the coaxial cable 6 is pushed into a hole 18 formed in the housing 4 from the direction of arrow A in FIG. Housing 4
Is formed on one side thereof with a pair of rectangular slits 20 which are continuous with the hole 18.
8, when it comes to the position of the slit 20, it expands by a spring property and gets caught on the bottom of the slit 20 of the housing 4 as shown in FIG. Is done.

The rectangular slit 20 formed in the housing 4 has a width slightly larger than the width of the rectangular tongue 16 as shown in FIG.

[0011]

However, when the external contact 8 having such a rectangular tongue 16 is attached to the housing 4 of the cable connector and then an external force in the rotational direction is applied to the coaxial cable 6, it is cut and raised. There is a problem that the tongue piece 16 contracts in the radial direction, the locking force with the slit wall is lost, and the coaxial cable 6 comes off the housing 4.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a cable connector which prevents a contact with a cable attached to a housing from coming off the housing. It is.

[0013]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a plurality of contacts each having a cut-and-raised tongue fixed to the end of each cable, and a plurality of contacts into which each contact is inserted. And a housing having a plurality of rectangular slits adapted to be inserted with the respective tongues formed so as to be continuous with a part of each of the holes, wherein the contact is formed with a slit. When inserted from the opposite side, the tongue is engaged with the bottom surface of the slit and the contact is locked to the housing.
The present invention provides a cable connector with a pull-out preventing mechanism, wherein the cut-and-raised tongue is formed such that the width of the tongue is widened toward the root and narrowed toward the root.

The tongue may be cut and raised so that the inclination of the tongue is small near the tip of the tongue, and the tongue is rapidly raised near the tip. Also, the width of the slit formed in the housing may be wide at the portion corresponding to the root portion of the rectangular tongue and gradually narrow at the portion corresponding to the tip portion while the tongue remains the rectangular tongue. Good.

[0015]

Since the conventional tongue is cut and raised at an angle from the cylindrical surface of the external contact, the tongue and the edge of the slit intersect at an angle. In such a state, when an external force is applied to the cable in the rotating direction, the cut and raised tongue slides along the edge of the slit and shrinks in the radial direction, and eventually the external contact connected to the cable comes out of the housing. become.

As in the present invention, the intersection between the tongue piece and the edge of the wall of the housing defining the slit is set to the bottom of the slit as much as possible, and the side surface of the tongue piece is located on the edge of the wall of the housing defining the slit. By not having
The contact tongues do not deform while sliding on the wall edge of the slit.

Accordingly, even when an external force in the rotating direction is applied to the cable, the contact connected to the cable is prevented from coming out of the housing of the cable connector.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Prior to the description of an embodiment of the present invention, an operation for easily removing a contact from a housing when a contact fixed to the end of a cable is rotated will be described in detail with reference to FIGS. .

When an external force in the rotating direction is applied to the cable,
A rotating force is applied to the external contact 8 in the direction of arrow A in FIG. As the external contacts 8 rotate, the tongues 16 also move against the wall of the housing 4 defining the slit 20. The point of intersection of the tongue piece 16 and the wall edge 20a of the housing 4 defining the slit 20 at this time is point B.

At point B, the reaction force X in the rotational direction and the slit 2
A force Z for pushing the tongue piece 16 upward along the edge 20a of the zero wall and a force Y for pushing and shrinking the tongue piece 16 are applied. Due to the force in each of these directions, the tongue piece 16 is deformed while being pushed and bent, and the intersection of the tongue piece 16 and the edge 20a of the housing wall defining the slit 20 gradually moves upward, and finally the tongue piece As a result, the external contact 8 connected to the cable is pulled out of the housing.

Such a problem occurs because the conventional tongue piece 16 is rectangular as shown in FIG. 10 and is cut and raised linearly at a certain angle from the root, so that the middle portion of the tongue piece is formed. This is for abutting the edge of the housing wall defining the slit.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The present invention relates to the improvement of the external contacts of the cable connector 2 shown in FIG. 8, and the overall configuration of the cable connector is the same as the configuration of the cable connector 2 shown in FIG.

First, an external contact according to a first embodiment of the present invention will be described with reference to FIGS. The external contact 22 includes a large-diameter open barrel portion 22a, an intermediate portion 22b, and a small-diameter tip portion 22c.

The open barrel portion 22a is provided with four caulking claws 24. These claws 24 are caulked and fixed to the outer conductor 6a and the coating 6d of the coaxial cable 6, so that the external contact 22 is connected to the coaxial cable. 6 is attached to the tip.

A pair of tongues 26 formed by cutting and raising are provided integrally with the intermediate portion 22b of the external contact 22. These tongue pieces 26 are formed such that the width thereof is wide at the distal end and gradually narrows toward the root as best shown in FIG.

Referring to the sectional view of FIG. 4, the coaxial cable 6 has an outer conductor 6a and a center conductor 6b which are electrically insulated by an insulator 6c, and the periphery of the outer conductor 6a is covered with a coating 6d. Have been done. In order to firmly fix the open barrel portion 22a of the external contact 22 by the claw 24, the outer conductor 6a of the coaxial cable and the insulator 6c are used.
And a sleeve 28 is interposed therebetween.

An insulator 32 is inserted between the intermediate portion 22b and the small-diameter tip portion 22c of the outer conductor 22, and the center conductor 6b of the coaxial cable 6 has a claw 30a inserted into the insulator 32.
A pipe-shaped center contact 30 fixed by swaging is inserted.

A hole 33 is formed at the end of the insulator 32. The center contact of the connector to be fitted is inserted into the hole 33, and the center contacts of both connectors are connected. The external contacts of the connector to be fitted are connected to the external contacts 22.

In the external contact of the first embodiment described above, the tongue piece 26 is formed in a trapezoidal shape having a large width at the tip and a small width at the root, so that the tongue 26 intersects with the edge of the housing wall defining the slit. When the external contact 22 is inserted into the housing of the cable connector, the tip of the tongue 26 is inserted deeply into the slit of the housing. For this reason, even when a rotational force is applied to the coaxial cable connected to the external contact, a force in the direction in which the tongue piece 26 contracts is not generated, and the external contact 22 comes out of the housing of the cable connector. Is prevented.

FIG. 6 is an enlarged view of a tongue piece of an external contact according to a second embodiment of the present invention. In the second embodiment, the tongue piece 26 'of the external contact 22' is cut and raised from the vicinity of the root to the vicinity of the tip as low as possible, and is rapidly raised near the tip.

In the second embodiment, the tongue 26 'intersects the wall edge of the housing defining the slit at a substantially right angle, so that the tongue 26' is prevented from sliding along the wall edge, This prevents the external contact 22 'from coming out of the housing.

Referring to FIG. 7, there is shown a partial sectional view of a slit of a housing according to a third embodiment of the present invention.
The housing 4 has a hole 18 for inserting an external contact, and a pair of trapezoidal slits 20 ′ continuously formed in a part of the hole 18. The width of the trapezoidal slit 20 'is wide at the opening of the slit and gradually narrows toward the bottom of the slit.

In the present embodiment, such a trapezoidal slit 2
0 'is formed, the conventional rectangular tongue is
When inserted into the slit 20 ', the tip of the tongue engages with the wall deeply inside the slit 20', and the edge of the wall defining the slit 20 'as in the first embodiment. Since there is no intersection with the tongue, no force is generated in the direction in which the tongue shrinks.

The slit formed in the housing of the cable connector is formed in a ring shape around the hole 18 for inserting the external contact, so that the tongue of the external contact and the edge of the housing wall defining the slit intersect. This is effective for preventing disconnection of the external contact. However, this structure is not very realistic because the slit is formed on the entire circumference of the hole 18, so that the width of the cable connector becomes large, and it is against the demand for high-density mounting.

[0035]

Since the present invention is constructed as described in detail above, the cut and raised tongue piece does not shrink even if an external force in the rotating direction is applied to the cable after the contact with cable is attached to the housing. This has the effect of preventing the cable from coming off the connector housing.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of a conventional problem.

FIG. 2 is an explanatory diagram of a conventional problem.

FIG. 3 is a view showing an external contact of the first embodiment.

FIG. 4 is a sectional view taken along line AA of FIG.

FIG. 5 is an enlarged view of a tongue piece of the external contact according to the first embodiment.

FIG. 6 is a partially enlarged view of a tongue piece of an external contact according to a second embodiment.

FIG. 7 is a sectional view of a housing according to a third embodiment.

FIG. 8 is a perspective view of a set of connectors to which the present invention is applied.

FIG. 9 is a perspective view of a conventional external contact.

FIG. 10 is a view showing a tongue piece of a conventional external contact.

11A and 11B are views showing a state in which a conventional external contact is inserted into a housing, wherein FIG. 11A is a cross-sectional view, and FIG. 11B is a view in the direction of arrow B in FIG.

[Explanation of symbols]

 2 Cable connector 4 Housing 6 Coaxial cable 8, 22, 22 'External contact 16, 26, 26' Tongue piece 18 hole 20, 20 'Slit

Continuation of the front page (56) References Japanese Utility Model Showa 58-51583 (JP, U) Japanese Utility Model Showa 50-61385 (JP, U) Japanese Utility Model Showa 55-49412 (JP, U) Japanese Utility Model Showa 55-5465 (JP) , U) Japanese Utility Model Showa 52-52692 (JP, U) Japanese Utility Model Showa 59-115586 (JP, U) Japanese Patent Publication No. 50-12594 (JP, B1) Japanese Patent Publication No. 50-15629 (JP, B2) (58) Field surveyed (Int.Cl. ⁷ , DB name) H01R 13/42

Claims (5)

(57) [Claims] A plurality of contacts (8, 22, 22 ') each having a cut and raised tongue (16, 26, 26') fixed to the end of each cable (6); (22,22 ') are inserted, and each tongue (16,26,26') formed so as to be continuous with a part of each hole (18) is adapted to be inserted. And a housing (4) having a plurality of rectangular slits (20).
Is inserted from the opposite side of the housing (4) in which the slit (20) is formed, the tongue pieces (16, 26, 26 ') engage with the bottom surface of the slit (20) and , 22,22 ')
Is a cable connector with a pull-out prevention mechanism that is locked to the housing (4), wherein the width of the cut-and-raised tongue piece (22) is formed so as to be wide at the tip end and narrow toward the root. Cable connector with pull-out prevention mechanism. 2. A plurality of contacts (8, 22, 22 ') having cut and raised tongues (16, 26, 26') fixed to the end of each cable (6); 22, 22 ') are inserted, and the tongues (16, 26, 26') formed so as to be continuous with a part of each hole (18) are adapted to be inserted. And a housing (4) having a plurality of slits (20) formed when the contact (8, 22, 22 ') is inserted from the opposite side of the housing (4) in which the slit (20) is formed. In addition, the tongue piece (16, 26, 26 ') is
0), wherein the contacts (8, 22, 22 ') are engaged with the housing (4) so that the contacts (8, 22, 22') are locked to the housing (4). A cable connector with a pull-out prevention mechanism characterized in that the tongue piece (22 ') is made small near the tip of the tongue piece (22'), and the tongue piece (22 ') is rapidly raised near the tip. 3. A plurality of contacts each having a rectangular cut and raised tongue (16) secured to the end of each cable (6).
(8,22,22 '), a plurality of holes (18) into which the contacts (8,22,22') are inserted, and the tongues formed so as to be continuous with a part of each hole (18). A housing (4) having a plurality of slits (20, 20 ') adapted to receive a piece (16)
And the contact (8, 22, 22 ′) is slit (2
(0, 20 '), the tongue piece (16) engages the bottom surface of the slit (20, 20') when inserted from the opposite side of the housing (4) in which the contact (8, 22 ') is formed. , 22 ′) are locked to the housing (4), the width of the slit (20 ′) is wide at a portion corresponding to the root of the rectangular tongue (16), A cable connector with a pull-out prevention mechanism, characterized in that the cable connector is formed so as to be gradually narrowed at a portion corresponding to the portion. 4. The cable (6) is a coaxial cable having an outer conductor (6a) and a center conductor (6b), and the contacts (8, 22, 22 ') are connected to the outer conductor (6a). The cable connector with a detachment prevention mechanism according to any one of claims 1 to 3, wherein: 5. A central contact (30) connected to a central conductor (6b) of the cable (6) is provided inside the contact (8, 22, 22 ') via an insulator (32). The cable connector with a pull-out prevention mechanism according to claim 4, characterized in that: