JP2900213B2 - connector - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connector in which a press contact terminal for connecting and conducting an uncovered electric wire to a press contact blade is mounted in a connector housing, and more particularly to an improvement in the connector housing.

[0001]

2. Description of the Related Art Connectors are frequently used for connecting wires to wires and connecting to electronic devices in recent electronic vehicles as well as various electronic devices. The connector generally has a configuration in which a terminal to which an electric wire is connected is mounted in a housing. However, there is a connector in which the connection between the electric wire and the terminal is performed by pressure welding instead of soldering or crimping.

[0002] Hereinafter, an example of a conventional press contact terminal and connector will be described with reference to FIGS. 7 to 10. First, the press contact terminal T will be described. As shown in FIGS.
A U-shaped slot 1 which is opened upward is provided in a plate portion obtained by cutting and raising a part of the bottom portion 6 of the base to form a press contact blade 2, and the press contact blade 2 is formed.
The wire 3 shown above is press-fitted as shown by an arrow. By press-fitting the electric wire 3, the pressing blade 2
Is cut into the coating 4 of the electric wire 3, and the conductor 5 of the electric wire 3 and the press-contact blade 2 are electrically connected to each other.

However, the press contact portion formed by the U-shaped slot 1 is weak against the pulling force in the longitudinal direction of the electric wire 3, and therefore, the terminal plate material is bent behind the press contact blade 2 to form an insulation barrel 8 (hereinafter simply referred to as “insulation barrel 8”). And a barrel 3 as shown in FIG.
To hold the press-contact portion by carrying the pulling force of the electric wire 3. By the way, when the electric wire 3 is routed in an automobile or the like, or when the electric wire 3 is routed in a wire harness in which the electric wire 3 is bundled, a tensioned state without slack so as not to generate a sound due to vibration or the like. For this reason, a large pulling force is applied to the electric wire 3, and if the external force is not carried, the press-contact portion is likely to have poor contact. Therefore,
The press contact terminal T is mounted in a connector housing 12 (hereinafter simply referred to as a housing) as shown in FIGS.

As shown clearly in FIG. 10, near the rear end of the terminal accommodating chamber 13 provided in the housing 12, that is, on the right side of FIG.
An electric wire accommodating hole 9 having an open bottom is provided. And
Cantilever-shaped plate-shaped spring piece 1 facing from edges before and after opening
5, and the spring piece 15 forms a spring bottom piece of the wire receiving hole 9.

On the other hand, the wire holding member 10 shown above the housing 12 engages with wire holding projections 16 arranged below the wire accommodating holes 9 correspondingly, and a locking claw 17 provided on the side of the housing 12. A locking piece 18 having a locking hole 19 for locking is provided. Then, the plurality of connected pressure contact terminals T are separated and housed in the housing 12, and the electric wires 3 are fitted into the respective pressure contact blades 2 as shown in FIG. 10, and the electric wire pressing members 10 are covered from above. Then, the wire pressing protrusion 16 presses the wire 3 downward, so that the wire 3 swells into the wire receiving hole 9,
A curved wiring portion 20 having a curved shape is formed. As a result, the spring piece 15 is displaced downward by the bent wiring portion 20 of the electric wire 3, and at the same time, the bending wiring portion 20 is urged upward by the repulsive force and pressed against the wire holding protrusion 16. That is, the electric wire 3 is sandwiched between the spring piece 15 and the electric wire pressing member 10 and functions as a strain relief by carrying the pulling force of the electric wire 3. The housing structure described above is disclosed in Japanese Utility Model Laid-Open Publication No. H4-115161.

[0006]

In the above-mentioned housing configuration, an electric wire holding member 10 which is a separate member from the housing 12 is required to carry the pulling force of the electric wire 3. For this reason, the number of parts increases, and the number of man-hours for mounting the wire holding member 10 also increases, which together contribute to an increase in cost. Since the wire holding member 10 is mounted on the housing 12, not only the outer diameter of the housing 12 after mounting becomes large, but also an obstacle to multi-stage. Further, depending on the outer diameter of the electric wire 3, the electric wire pressing member 10 may not be able to be attached, and when the electric wire 3 is too small, the strain relief function is not exhibited at all and lacks versatility. An object of the present invention is to provide a connector configured to securely press an electric wire connected to a press contact terminal without using an external component.

[0007]

The object of the present invention SUMMARY OF THE INVENTION, in the connector formed by housing a pressure contact terminal connected to the electric wire by pressing the formed Osamu volume chamber housing, for accommodating the press-connecting terminals of said housing A concave portion was formed at the position, and a step portion fitted to the concave portion and a holding portion for holding the electric wire in a fixed state were formed at the press contact terminal, and the step portion was fitted to the concave portion. The press contact terminal is housed in the state, and the electric wire is fixed to the holding portion and wired so that a part of the electric wire swells into the concave portion, and the external force applied to the electric wire is increased by the swelling. This is achieved by a connector characterized by being configured to carry.

[0008]

In other words, the step formed on the pressure contact terminal is fitted into the recess formed in the housing, and the wire is fixed by the holding portion formed on the step, so that the wire to be routed is located at the position where the recess is formed. It swells, in other words it bends in a meandering manner. Therefore, even if an external force such as pulling out the wire is applied, the wire does not come out, a connection failure between the press contact terminal and the wire does not occur, the number of parts and the number of working steps can be reduced, and the connector can be downsized. .

Next, a first embodiment of the present invention will be described with reference to FIGS.
An embodiment will be described. 1 is a partially cutaway perspective view of a housing, FIG. 2 is a partially cutaway perspective view showing a connector structure in a state where electric wires are connected, FIG. 3 is a side view showing a connector structure in a state where electric wires are connected, and FIG. FIG. 3 is a sectional view taken along line AA of FIG. 2. Note that the press contact terminal t in the present embodiment is obtained by changing a part of the shape of the conventional press contact terminal T, and therefore, members having the same functions as those in the related art are denoted by the same reference numerals, and description thereof is omitted.

The housing 31 is formed by integrally molding a synthetic resin, and has a desired number of housing chambers 32 formed in longitudinal recesses for housing the press contact terminals t. An insertion hole 32b for inserting a male terminal (not shown) of the connector into the external connection portion 7 of the press contact terminal t is provided in the front wall portion 32a of the accommodation chamber 32. The bottom plate 33 of each of the accommodation chambers 32 is provided with a retaining projection 34 for preventing the pressure terminal t from coming off.

In the middle of each of the storage chambers 32, an elastic member 36 is provided on a side plate 35 serving as a partition wall of each of the storage chambers 32 in order to fix the pressure contact terminal t, in other words, to prevent the terminal from rising upward. ing. The shape of the elastic member 36 is
A flange that protrudes to one side is formed on the top of a plate material that has elasticity on the left and right. Moreover, the rear end side of each accommodation room 32,
That is, the concave portion 37 is formed at the bottom on the right side of FIGS. Further, a pressing member 38 is provided behind each recess 37 so as to project from each side plate 35 into each storage chamber 32.
Is provided. Each recess 37 and each holding member 38
This is for stray relief of the electric wire 3 by interaction, and this operation will be described later in detail.

On the other hand, the press contact terminal t is connected to
2, but the structure of the bottom 6 is different. That is, the conventional press contact terminal T has a plate-like shape on the entire bottom portion 6, but the press contact terminal t in the present embodiment has a stepped portion 6 a at the rear end side for fitting into the recess 37. Since the insulation barrel 8 corresponding to the holding portion according to the present invention is provided on the upper surface of the step portion 6a, in a state where the press-contact terminals t are accommodated in the respective accommodation chambers 32, FIGS.
As shown in FIG. 3, the step portion 6a fits into the concave portion 37,
The insulation barrel 8 is positioned in the recess 37.

Next, the strain relief function of the electric wire 3 will be described. The press contact terminals t are individually accommodated in the respective accommodation chambers 32 as shown in FIGS. 2 and 3, and are fixed by the action of the retaining projections 34 and the elastic members 36. ID terminal t
The connection between the wire and the electric wire 3 is made by the press contact blade 2 as in the conventional case. The lead-out side of the electric wire 3 is bent along the concave portion 37, and the bent portion 41 is fixed by being wound around the insulation barrel 8, and the rear end side is pressed down by the pressing member 38 as shown in FIG. As a result, the electric wire 3 has a shape that has been deformed once in the concave portion 37 and then returned to the original shape, in other words, a shape that swelled in the concave portion 37, and this portion meanders and is bent and wired as shown in FIG. Will be. Therefore, even when the electric wire 3 is pulled by an external force, the stray relief is performed by the bending by the concave portion 37 and the pressing member 38, so that the press-contact terminal t as well as the electric wire 3 can be prevented from being pulled out. As a result, the electric wire 3 does not come off from the insulation displacement terminal t, and it is not necessary to pay special attention during the wiring work.

As described above, according to the structure of the housing 31 and the press contact terminal t shown in the present embodiment, the wire 3 can be prevented from coming off by the concave portion 37 and the stepped portion 6a. No additional member is required. Therefore, the number of parts and the number of work steps can be reduced, and cost reduction and size reduction can be achieved. When the connector is used, the housing 31 is housed in the case, so that the upper surface of the housing 31 is covered by the upper cover 42 and the bottom plate 33 is covered by the lower cover 43 as shown in FIG. An elastic locking piece 44 is provided on the distal end side of the lower cover 43. The elastic locking piece 44 is locked in a locking hole 45 provided in the bottom plate 33 to prevent the case and the housing 31 from coming off. It is devised to do so.

Next, a second embodiment of the present invention will be described with reference to FIGS. The feature of this embodiment is that a multi-stage connector is configured by using the housing 31 described above. The multi-stage connector TC is configured by housing a connector C configured by using one housing 31 in a storage box 51, and the configuration of each connector C is as described in the first embodiment. However, FIG. 5 shows a connector in which three press contact terminals t are mounted as the connector C,
The number and the like of the press contact terminals t are not limited to those shown in the drawings, and may be freely changed as necessary.

The storage box 51 is integrally molded using a synthetic resin, and a storage section 54 for storing the connector C is formed in a frame 52 by a partition plate 53. And
As shown in FIG. 6, a pair of elastic locking members is provided on each of the partition plates 53 near one opening of each storage portion 54, that is, near the opening opposite to the opening for inserting the connector C shown in FIG. Piece 55
Is provided. The elastic locking piece 55 corresponds to the elastic locking piece 44 shown in the first embodiment, and has a locking hole 45 formed in the bottom plate 33 when the connector C is inserted into each storage portion 54. , And each connector C is positioned and prevented from falling off.

As described in the first embodiment, each connector C has a small size without using any external parts. Therefore, the internal space of the storage section 54 may be small, and the storage box 51 may be downsized. Multi-stage connector TC
Can be stored and assembled in the storage section 54 from the direction shown by the arrow B.
Is reduced in size, so that the storage section 54 and, consequently, the entire storage box 51 are also reduced in size and easy to handle.

Although the embodiment of the present invention has been described above, the present invention is not limited to the above, and various modifications are possible. For example, the concave portion 37 may be configured in a plurality,
Further, it may be formed in multiple stages.

[0019]

As described above, in the connector according to the present invention, a recess is provided in the housing portion of the housing for accommodating the crimp terminal to which the electric wire is connected by crimping, and the recess is fitted to the crimp terminal. A step portion and a holding portion for fixing the electric wire are provided, the press contact terminal is accommodated in the housing portion, and the electric wire connected to and routed to the press contact terminal is fixed to the holding portion. Therefore, the routed electric wire swells into the concave portion, and is not easily pulled out even if an external force is applied to the electric wire, so that poor connection with the press contact terminal does not occur. Furthermore,
Since the holding portion is provided integrally with the pressure contact terminal, external parts for holding down the electric wire are not required, so that the number of parts and the number of working steps can be reduced, and the connector can be downsized. .

[Brief description of the drawings]

FIG. 1 is a partially cutaway perspective view of a housing showing a first embodiment of the present invention.

FIG. 2 is a partially cutaway perspective view of a housing showing a wiring state of electric wires.

FIG. 3 is a cross-sectional view of a housing showing a wiring state of electric wires.

FIG. 4 is a sectional view taken along line AA of FIG. 2;

FIG. 5 is a perspective view of a multi-stage connector showing a second embodiment of the present invention.

FIG. 6 is a perspective view showing a locking structure of the multi-stage connector.

FIG. 7 is a perspective view of a main part showing a structure of a conventional pressure contact terminal.

FIG. 8 is a cross-sectional view of a main part showing connection between a press contact terminal and an electric wire.

FIG. 9 is an exploded perspective view showing the structure of a conventional connector.

FIG. 10 is a partially cutaway perspective view showing the structure of a conventional connector.

[Explanation of symbols]

 6a Stepped portion 8 Insulation barrel 31 Housing 32 Storage chamber 33 Bottom plate portion 34 Retaining protrusion 35 Side plate 36 Elastic member 37 Recessed portion 38 Pressing member 41 Bending portion 44 Elastic locking piece 45 Locking hole C connector TC Multi-stage connector t Pressure contact terminal

Claims (1)

(57) [Claims] 1. A by pressing the formed Osamu volume chamber housing a connector formed by housing a pressure contact terminal connected to the wire, to form a recess at a position for accommodating the press-connecting terminals of said housing, said pressure contact terminal forming a holding portion for holding the wire in a fixed state on the stepped portion and the stepped portion fitted in the recess, the press-connecting terminal accommodated in a state fitted to the stepped portion in the recess, and the holding before a part of the electric wire by arranging and securing the wire to the part
A connector characterized in that the connector is configured to swell in the recess so as to carry an external force applied to the electric wire by the swelling.