JPH02276176A - Cable fixing structure for electric connector - Google Patents

Abstract

PURPOSE:To force-set and fix the almost all periphery of the cover of a cable uniformly so as not to damage the conductor inside a lead wire by attaching a hook means to a housing and a fixing member, which has a hooking projection, to the cable side. CONSTITUTION:A lead wire 51 is inserted in the lead wire through hole 31 of a arranged line holder 30, and also a cable fixing member 20 in reversed U shape is force-set and fixed to the cover end of a cable 50 by a force-setting tool. Next, the lead wires of the cable to which the fixing part member 20 is force-set are inserted into an arranged-line holder 30, and in that conditions those are inserted into respective openings 12 and 13 at the rear of a housing. The hooking wings 21 of the cable fixing member 20 fixed to the cable end are arranged at fixed positions in the depth of the opening 13. Lastly, a hooking wing bending jig tool 60 is let down from above through grooves 14 so as to press down the hooking wings 21. Hereby, the hooking wings 21 curve downward under the grooves 14 and is plastically deformed and press-fit and fixed in narrowed grooves 14A under the grooves 14.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a fixing structure for fixing a cable to a housing of an electrical connector.

[Conventional technology]

2. Description of the Related Art Conventionally, there has been a so-called modular plug connector disclosed in Japanese Patent Publication No. 57-043986 as a small electrical connector used in telephones and the like. This Moji error plug connector is generally widely used as a small, lightweight, and inexpensive connector. The fixing structure between the housing and the cable of this connector is that the housing has a plurality of contacts on one end side and an opening for receiving the flat multi-core cable on the other end side, and further has an opening for receiving the received cable in the middle part. It has a protruding portion that deforms in response to external force so as to press against the outer skin. After inserting the cable and connecting the contacts to each core wire, an external force is applied to the protruding portion to deform it and fix the cable.

[Problem to be solved by the invention]

However, the cable fixing structure of such a conventional connector has the following problems.

■ The protruding parts of the flat cable from the top to the bottom press the cable strongly and unilaterally to fix it, which may damage the thin core wire (conductor) of the cable, increase electrical resistance, or cause it to break. I was doing a lot of things. Furthermore, when the cable is a multi-core round cable, this problem becomes more prominent.

■ Providing a protruding part for pressing the cable on the housing makes the structure complicated, and the mold for forming the housing also becomes complicated, resulting in high costs.

■ Since the housing is made of plastic, the protruding parts for pressing the cable and the locking parts for holding the protruding parts in a deformed state will deteriorate over time more significantly than metal materials. The holding power gradually weakens,
There is also a possibility that the pressing force will eventually disappear and the cable will no longer be fixed.

■ There are various types of multi-core cables to be connected, such as round cables, flat cables, and cables with different outer diameters, depending on the purpose, etc., but the cable fixing structure of the housing has a pressing protrusion. Since the dimensions of the shaped portion are fixed, it cannot be adapted to various uses.

SUMMARY OF THE INVENTION An object of the present invention is to solve these problems and provide a cable fixing structure for a connector that is inexpensive, reliable, and can fix various types of cables to a housing in a simple manner.

[Means to solve the problem]

According to the present invention, the above object is provided in an electrical connector having a housing having a plurality of contacts arrayed and held at one end side and an opening for receiving and holding a cable at the other end side. A cable fixing member having a locking protrusion projecting laterally is crimped and fixed to the outer periphery of the cable near the terminal-treated end, and the locking protrusion of the cable is located within the opening of the housing. A locking means is provided for locking and fixing the cable, and after the cable is inserted into the cable receiving opening of the housing, the locking protrusion of the cable fixing member is locked and fixed by the cable locking and fixing means of the housing. be achieved by.

[Effect]

According to the present invention, the electrical connector is completed according to the following steps.

■ First, a cable fixing member is crimped and fixed to the outer sheath of the cable where each core wire of the multi-core cable is exposed using an appropriate jig.

■ Next, insert the above cable into the opening of the housing. At this time, if the locking protrusion is one that causes elastic deformation, it is press-fitted into the opening, and at the position where it is press-fitted by a predetermined amount, it is locked with the locking means of the housing in a snap-like manner. Further, when the locking protrusion is for plastic deformation, after being inserted into the opening, it is plastically deformed by appropriate means and comes to lock with the locking means of the housing.

■ After that, a contact is connected to each core wire of the cable.

〔Example〕

Hereinafter, the present invention will be described in detail based on the accompanying drawings.

1 to 4 show a first embodiment of the invention.

Figure 1 is a partially cutaway perspective view of the cable fixed in the housing of the connector, Figure 2 is an exploded perspective view of the cable before it is inserted into the housing, and Figure 3 is a cross-section taken along line A-A in Figure 1. 4 are cross-sectional views taken along the line B--B in FIG. 1.

In the figure, the connector 1 includes a housing 10, a cable fixing member 20, a wire alignment holder 30, and a plurality of contacts 40.
It is formed by. 50 is a multi-core cable having a round outer shape.

The housing 10 is integrally molded from an insulating material such as a plastic material, and has the shape of a rectangular parallelepiped.A plurality of contact holding grooves are provided above the front end (left side in FIG. 1) of the housing 10. 11 is provided with an opening so that a plate-shaped contactor, which will be described later, can be inserted and held from the outside. The holding groove 1
1 communicates with a lead wire holding hole (not shown) that receives each lead wire 51 of the cable 50, and when the lead wire 51 is inserted into the holding hole and held, The contact 40 is press-fitted into the holding groove 11 from above, and the lead wire and the contact can be electrically connected. On the other hand, the rear end surface of the housing 10 (on the right side in FIG. 1) is provided with a round cable 50 with a holder for receiving a round cable 50 with lead wires 51 arranged horizontally in a line in a wire arrangement holder 30, which will be described later.
A rectangular opening 12 with a circular center, and an opening 13 above the opening 12 that communicates with the opening 12 and receives a locking wing 21 of a cable fixing member 20 to be described later.
is formed. The inner part of the opening 12 communicates with the aforementioned lead wire holding hole (not shown). The opening 13 is
It communicates with a vertical groove 14 provided on the upper surface of the housing for pushing and bending the locking wing 21 downward with a jig. Below the groove 14, a narrow groove 14A (see FIG. 4) is formed as a cable locking and fixing means.

The cable fixing member 20 is formed by punching and bending a sheet metal material by press working, and has a wing-shaped retaining member extending laterally in the center thereof, as well shown in FIG. A locking wing 21 serving as a stopper, and a pair of cable fixing portions 22 in an inverted U shape are formed at the front and rear of the locking wing 21. A plurality of protrusions 23 are provided on the side edge of the locking wing 21 for biting into the inner surface of the groove 14A and press-fitting when pressed downward in the groove 14 with a jig.

A concavo-convex portion 24 is formed at the lower end of the cable fixing portion 22 so that when the cable is rounded and fixed and crimped, a pair of rounded ends engage with each other to make the crimping even stronger.

The wire alignment holder 30 is for aligning the lead wires 51 of the cables at predetermined positions for insertion into the lead wire holding holes, and has lead wire through holes 31 provided at the same pitch as the lead wire holding holes. It is provided.

The contactor 40 is formed of a sheet-like conductive metal material, and has a contact portion 41 at the upper end for contacting the contactor of a mating connector, and a bifurcated bifurcated actual portion 42 at the lower end.
and is provided. This actual part 42 has a lead wire 51
When the lead wire 51 is inserted into the lead wire through hole 31 of the housing, the lead wire 51 is actually connected to the conductor of the lead wire through the outer cover.

In this embodiment configured as described above, the cable connection procedure of the connector will be explained.

■ First, peel off the outer cover at the tip of the cable 50 to expose the lead wires 51 with appropriate dimensions, and then
is inserted into the lead wire through hole 31 of the wire alignment holder 30, and the inverted U-shaped cable fixing member 20 is crimped and fixed to the outer skin end of the cable 50 using a crimping tool (not shown) (see FIG. 2). ).

(2) Next, the cable lead wires to which the fixing members 20 are crimped are inserted into the wire alignment holder 30 and inserted into the respective openings 12 and 13 at the rear end of the housing. The lead wire 51 protruding from the cotton tying holder 30 is inserted into the lead wire holding hole, and the wire tying holder 30 is inserted into the deep part of the rectangular opening 13, thereby securing the cable fixing member 20 fixed to the cable end. The locking wing 21 is arranged at a fixed position in the inner part of the opening 13.

■Finally, as shown in FIG. 3, the locking blade bending tool 60 is lowered from above through the groove 14 to
Press 1 downward. As a result, the locking blade 21 is curved and plastically deformed toward the bottom of the groove 14, and is press-fitted and fixed into the narrowed groove 14^ below the groove 14.

At this time, the protrusion 23 of the locking blade 21 bites into the inner wall of the groove 14, and the locking blade 21 is press-fitted and locked more firmly. Thereafter, the contact 41 shown in FIG. 1 is press-fitted into the contact holding groove ll for the lead wire inserted into the lead wire holding hole, thereby electrically connecting the conductor of the lead wire and the contact to complete the connector. . Thus, even if the assembled and connected cable is pulled from the rear, the cable will not be pulled out of the housing.

Next, a second embodiment shown in FIG. 5 will be described.

In the previous embodiment, the locking blade was locked to the housing by undergoing plastic deformation, but this embodiment is characterized by utilizing plastic deformation. In FIG. 5, the housing IO is provided with elastic locking claws 14B, 14B at the top. The locking claw portion 14B is provided with a downwardly facing claw 14B' at the right end, and a locking wing 21B is provided in the opening 13B.
It can be elastically deformed upward when it is press-fitted. When the locking wing 21B is press-fitted by a distance corresponding to its width, the locking claw portion 14B returns to its original shape and the claw 14
It locks with the locking wing 2111 at B' to prevent the cable from coming off. In this embodiment, a thin plate is used as the claw 14B'.
By press-fitting between the locking blade 21B and the locking wing 21B, the locking claw portion 21B can be elastically deformed again and the cable can be pulled out together with the plate.

In the third embodiment shown in FIG. 6, the locking protrusion 21C is folded back in the longitudinal direction of the cable, and when inserted into the housing, the locking protrusion 21C is elastically deformed and provided on the inner surface of the housing. It is intended to be locked in a snap-like manner to the locking stepped portion 14C.

Although each of the above embodiments describes a fixing structure for a round cable, the present invention is not limited thereto, and can be easily applied even to a flat cable by making the structure of the cable fixing member into a through-groove shape. It is what it is.

〔Effect of the invention〕

As described above, the present invention provides the following effects because the locking means is attached to the housing and the fixing member having the locking protrusion is attached to the cable side.

■ The cable fixing member can evenly crimp and fix almost the entire circumference of the cable, and the conductor inside the lead wire will not be damaged, and there will be no increase in electrical resistance or disconnection.

(2) The housing can be formed simply because it is only necessary to provide an opening for a locking wing, etc., and the mold for forming the housing can be simple, so it can be manufactured at low cost.

- Since the cable fixing member is made of a sheet-like metal material, even if it is crimped and fixed to the cable and housing, it will not deteriorate over time, and there will be no problems such as loosening of the crimped fixation or locking.

■ Even if the cable fixed to the housing is a round cable, a flat cable, or a cable with a slightly different outer diameter, it is possible to use a variety of cables by simply preparing an inexpensive cable fixing member. It is very convenient because it can be used with cables.

[Brief explanation of drawings]

1 is a partially cutaway perspective view of an electrical connector incorporating a cable according to a first embodiment of the present invention, FIG. 2 is a perspective view of the connector of FIG. 1 before the cable is inserted, and FIG. 3 is a perspective view of the connector of FIG. 4 is an enlarged sectional view taken along line B-B of FIG. 1, FIG. 5 is a perspective view of the second embodiment, and FIG. 6 is a perspective view of the third embodiment.

Claims (1)

[Claims] An electrical connector having a housing having a plurality of contacts arrayed and held at one end and an opening for receiving and holding a cable at the other end, wherein the cable is terminal-treated. A cable fixing member with a locking protrusion protruding laterally is crimped and fixed to the outer circumference of the cable near the end of the cable, and the locking protrusion of the cable is fixed and fixed in the opening of the housing. and the locking protrusion of the cable fixing member is locked and fixed by the cable locking and fixing means of the housing after the cable is inserted into the cable receiving opening of the housing. A cable fixing structure for electrical connectors featuring: