JP3552532B2 - Connector with wire retainer - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a connector provided with a wire holder.
[0002]
[Prior art]
Conventionally, when a wire is pulled out from the rear surface of a connector housing, when a pulling force acts on the wire, a portion (lance) locked in the connector housing in a terminal fitting connected to each wire is directly connected to the wire. , The pulling force will reach. Therefore, conventionally, a cover is attached to the rear surface of the connector housing, and the wire is once bent and then pulled backward. For example, Japanese Unexamined Patent Publication No. 9-161883 shown in FIGS. 13 and 14 can be used.
The cover 100 shown in FIGS. 13 and 14 is provided on both sides with locking arms 103 which are locked to the projections 102 of the connector housing 101. When the cover 100 is mounted, the bottom surface of the cover 100 and the connector The electric wire W is bitten between the lower surface of the housing 101 and the electric wire W can be folded back into a U-shape.
[0003]
[Problems to be solved by the invention]
However, in the method in which the electric wire W is bent while being bitten between the cover 100 and the connector housing 101 as described above, it is difficult to mount the cover 100, and particularly when the electric wire W has a large diameter, a large force is required for mounting. Had become. In addition, since the locking means (locking arms) are provided on both sides of the cover 100, the width of the connector as a whole increases accordingly, which is disadvantageous when the installation space is restricted in the width direction. There were also points.
SUMMARY OF THE INVENTION It is an object of the present invention to provide a connector provided with an electric wire holder which is excellent in assembling workability.
[0004]
[Means for Solving the Problems]
The invention according to claim 1 for achieving the above object is a connector including an electric wire holder for forcing an electric wire drawn from a back surface of a connector housing to be bent along the back surface, The wire holder includes a holding unit that binds and holds the wires, and a locking unit that releasably locks to the back surface of the connector housing to withstand the wire pulling force. An upright wall flush with the rear surface is erected, and the locking means is locked on the upright wall, while the locking means abuts against the inner surface of the upright wall, thereby pulling the electric wire. The feature is that it is configured to resist force .
[0005]
The invention of claim 2, in those of claim 1, wherein said upstanding wall is formed notches insertion groove from the edge, while the locking means is capable of insertion from the inlet side to the insertion groove A narrow portion is formed, and the narrow portion is formed wider than the insertion groove and is in contact with the inner surface of the upright wall, so that a pressure receiving surface for receiving a pulling force on the electric wire is continuous. It has features.
[0006]
Furthermore the invention of claim 3, while the upright to the wall insertion hole is formed through, the wire holder, wherein the insertion insertion into holes capable shank provided shaped overhanging the shaft portion and It is possible to penetrate the insertion hole by reducing the diameter, and after passing through the through hole, a flange piece that receives the pulling force of the electric wire is formed by expanding the diameter and abutting against the inner surface of the upright wall. It has features where it is done.
[0007]
According to a fourth aspect of the present invention, in the second aspect, the narrow portion can be inserted at the entrance of the insertion groove, but the narrow portion can be prevented from coming off after passing through the narrow portion. A characteristic throat portion is formed.
[0008]
[Action]
According to the first aspect of the present invention, after the wires drawn out of the connector housing are bound and held by the holding means, the wires are locked to the upright wall on the back surface of the connector housing by the locking means. Thus, the electric wires are attached along the back surface of the connector housing. Therefore, even if a pulling force acts on the wire backward, only the pulling force acts on the locking portion between the locking means and the upright wall on the rear surface of the connector housing. Is not affected.
As described above, in the first aspect, after the electric wire is held by the holding means, the electric wire holder may be simply attached to the upright wall on the back surface of the connector housing. Since the electric wire is not mounted by biting the electric wire between them, a large force is not required for mounting.
[0009]
According to the second aspect of the invention, the electric wire holder holding the electric wire is attached to the connector housing by inserting the narrow portion from the opening end of the insertion groove. Then, when a tensile force acts on the electric wire, the pressure receiving surface comes into contact with the inner surface of the upright wall and resists it, so that the tensile force can be reliably received.
[0010]
According to the third aspect of the present invention, when attaching the electric wire holder holding the electric wire to the connector housing, the flange piece is pressed into the insertion hole. At this time, the flange piece passes through the insertion hole by being reduced in diameter, and after passing through, the diameter is increased to prevent falling off. Thereby, when a pulling force acts on the electric wire, the flange piece abuts against the inner surface of the upright wall and resists it.
[0011]
According to the fourth aspect of the present invention, when attaching the wire holder to the connector housing, when the narrow portion is pushed into the insertion groove, the narrow portion enters the deep portion of the insertion groove while expanding the throat portion. Then, the throat portion returns to regulate the return of the narrow portion, so that the wire holder is automatically prevented from coming off.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
-1st Embodiment-
1 to 6 show a first embodiment of the present invention. In the figure, reference numeral 1 denotes a synthetic resin connector housing, in which a plurality of cavities 2 are formed penetrating in the front-rear direction. Inside each of the cavities 2, lances (not shown) are formed to engage with terminal fittings connected to the ends of the electric wires W to prevent them from falling out. A lock arm 3 for locking with a mating connector housing that can be fitted into the connector housing 1 is provided on the upper surface of the connector housing 1 so as to be flexibly deformable.
[0013]
An upright wall 4 is provided upright at the rear edge of the upper surface of the connector housing 1 over the entire width thereof. In this embodiment, in order to secure the strength of the upright wall 4 and the like, it also extends to both side edges of the connector housing 1, and is formed in a generally U-shape as a whole. Further, an insertion groove 5 is formed vertically at the center of the upright wall 4 with a depth extending from the upper edge thereof to the upper surface of the connector housing 1. A pair of protruding pieces 6 face each other at the entrance side of the insertion groove 5 with a narrow interval, and a narrow throat portion 7 that can be flexibly deformed in the expanding direction is provided therebetween. The opening side of the both protruding pieces 6 has a tapered shape that expands outward so as to guide the electric wire holder H1 at the time of insertion. The lower edges of both protruding pieces 6 are formed in a direction (horizontal direction) orthogonal to the direction of the throat portion 7, and serve as a locking surface 9 that engages with the narrow portion 8 of the wire holder H1.
[0014]
Next, the electric wire holder H1 will be described (refer mainly to FIG. 6). The electric wire holder H1 has a pair of holding plates 10A and 10B, and the center between them is connected by a narrow portion 8. A clamp 11 for binding the electric wire W is provided on an outer surface of one holding plate 10A. The clamp 11 of this embodiment includes a pair of flexible band pieces 12A and 12B. On one surface of one of the band pieces 12A, a number of locking edges 13 are formed in a sawtooth shape along the length direction. At the end of the other band piece 12B, a rectangular frame-shaped connecting member 14 is formed. The connecting tool 14 can insert one of the band pieces 12A, and has an opening edge formed with a hook claw 15 for releasably engaging an arbitrary locking edge 13 so as to be able to be deformed.
[0015]
Further, the narrow portion 8 connecting the two holding plates 10A and 10B is formed to be lower than the height of the two holding plates 10A and 10B, and the width thereof is set wider than the throat portion 7, so that the electric wire holder H1 is provided. With the entire pushing force, it passes between the two protruding pieces 6, that is, while expanding the throat portion 7, and after the protruding piece 6 returns after passing through the throat portion 7, its upper surface is The electric wire holder H1 is locked to prevent the entire electric wire holder H1 from coming off. Thus, when the narrow portion is inserted into the insertion groove, the wire holder H is attached to the connector housing 1 with the upright wall 4 sandwiched between the holding plates 10A and 10B. The inner surfaces of the holding plates 10 </ b> A and 10 </ b> B that are located inside the upright wall 4 serve as pressure receiving surfaces 16 that resist the pulling force of the electric wire W by contacting the inner surface of the upright wall 4.
The holding plates 10A and 10B are formed to have such a width that they can fit inside the upright wall 4, and the height thereof is such that when the electric wire holder H is attached to the connector housing 1, the upper edge thereof is upright. Is formed so as to be flush with the upper edge or lower.
[0016]
Next, the operation and effect of the first embodiment configured as described above will be described. A terminal fitting connected to the electric wire W is inserted into each cavity 2 of the connector housing 1. As a result, each terminal fitting is elastically locked with a lance (not shown) in the cavity 2 to prevent the terminal fitting from falling off. Thus, the electric wires W drawn out from the back surface of the connector housing 1 are bound by the clamp 11 of the electric wire holder H1. That is, the electric wires W are bundled with both band pieces 12A and 12B, the band piece 12A on the side where the locking edge 13 is formed is passed through the connecting member 13, and the band pieces 12A and 12B are tightened until the electric wires W are tightened. The locking edge 13 and the hook claw 15 are locked in a state of being tied. Thereby, the electric wires W are held by the electric wire holder H in a bound state.
[0017]
Next, the narrow portion 8 of the electric wire holder H1 is adapted to the opening of the insertion groove 5 and is pushed in as it is, and the narrow portion 8 expands the throat portion 7 by pushing out the two protruding pieces 6. After passing through the throat portion 7, the locking surfaces 9 of the two projecting pieces 6 that have been restored are prevented from coming off. Thus, as a result of the electric wire holder H1 being attached to the connector housing 1, each electric wire W is held in a bent state along the back surface of the connector housing 1. After that, each electric wire W is extended to the rear of the connector housing 1. Even if a tensile force acts on the electric wire W, the tensile force acts on the electric wire holder H1, and a lance portion (not shown) in the cavity 2 is formed. Does not work. More specifically, the pulling force applied to the wire holder H1 is received when the pressure receiving surface 16 contacts the inner surface of the upright wall 4. That is, since the entire pressure receiving surface 4 resists this pulling force, the connector housing 1 can be securely received the pulling force without inadvertent deformation of the connector housing 1 side.
[0018]
Further, in this embodiment, since both holding plates 10A and 10B are formed narrower than the upright wall 4, the wire holder H does not protrude in the width direction of the connector housing 1, so that the connector can be made as compared with the prior art. Enlargement in the width direction as a whole can be avoided, and this is effective when the installation space is limited.
Further, in the conventional case where the electric wire W is bent by using the cover, a large force is required at the time of mounting because the electric wire W is bitten, but in this embodiment, the electric wire holder H1 is attached by attaching the electric wire holder H1. Since the electric wire W is bent and the electric wire holder H1 is attached simply by inserting the electric wire holder H1 into the insertion groove 5, the force required for the attachment is small.
[0019]
-2nd Embodiment-
FIG. 7 shows an electric wire holder H2 according to a second embodiment of the present invention. In this embodiment, both holding plates 10C and 10D are formed in a disk shape, and the narrow portion 8 has a structure in which the centers of both holding plates 10C and 10D are connected. By forming the holding plates 10C and 10D in a disk shape in this manner, there is no restriction on the mounting direction of the connector housing 1 with respect to the insertion groove 5, and the workability is excellent.
Other configurations are the same as those of the first embodiment, and exhibit the same functions and effects.
[0020]
-Third embodiment-
FIG. 8 shows an electric wire holder H3 according to a third embodiment of the present invention. In each of the above embodiments, a pair of holding plates is provided, but in this embodiment, the holding plate 10E having the pressure receiving surface 16 (the holding plate that contacts the inside of the upright wall). Only provided. Further, the clamp 11 is disposed at the center of the front surface of the narrow portion 8.
With such a structure, there is an advantage that the structure is simplified more than the electric wire holders of the first and second embodiments.
Other configurations are the same as those of the first and second embodiments, and the same functions and effects can be exerted.
[0021]
-Fourth embodiment-
FIG. 9 shows a connector housing 1A according to a fourth embodiment of the present invention, in which an insertion groove 5 provided in an upright wall 4 is formed in a horizontal direction. In this configuration, when the electric wire W is pulled upward, the opening direction of the insertion groove 5 is a direction orthogonal to the pulling direction, so that an effect that the electric wire holder is hardly detached is obtained.
Other configurations are the same as those of the above-described embodiments, and the same operation and effect can be exhibited.
[0022]
-Fifth embodiment-
10 to 12 show a fifth embodiment of the present invention. In the connector housing 1B in this embodiment, the upright wall 4 is provided upright only on the rear edge of the upper surface, and a circular insertion hole 17 penetrates the center of the upright wall 4. On the other hand, as the wire holder H4, one having the same configuration as the band piece of each embodiment described above is used, and a clip 18 is provided at the center of the band piece. The clip has a structure including a shaft portion 18A that can be inserted into the insertion hole and a pair of flange pieces 18B that can be expanded and narrowed and deformed at the distal end side of the shaft portion 18A. The flange piece 18B is narrowed and deformed and can pass through the insertion hole 17, but after passing through, returns to the expanded state and protrudes toward the inner surface side of the upright wall. By doing so, it is possible to withstand the pulling force on the electric wire W.
With such a configuration, the same operation and effect as those of the above-described embodiments can be exhibited.
[0023]
The present invention can be variously modified, and the following modifications are also included in the technical scope of the present invention.
(1) In any of the embodiments, the clamp for the electric wire W does not need to be formed integrally with the electric wire holder, and may be a separate member. Further, the method of clamping need not be a method of tightening with a band, but may be a structure of simply passing the electric wire W through a ring-shaped member. In this case, the electric wires W may be inserted all at once, or may be individually inserted with a large number of through holes.
{Circle around (2)} Although the insertion groove or the insertion hole is formed on the connector housing side in each of the embodiments, these may be disposed on the electric wire holder side, and a narrow portion or a clip may be disposed on the upright wall side.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a state before attaching an electric wire holder in the first embodiment; FIG. 2 is a perspective view showing a state after attaching the electric wire holder; FIG. 3 is a perspective view showing a state where a narrow portion is locked in an insertion groove; FIG. 4 is a cross-sectional view of the same part viewed from the side. FIG. 5 is a cross-sectional view of a binding part of the electric wire. FIG. 6 is a perspective view of the electric wire holder viewed from the back. FIG. 8 is a perspective view of the electric wire holder according to the second embodiment as viewed from the back side. FIG. 8 is a perspective view of the electric wire holder according to the third embodiment as viewed from the back side. FIG. 9 is a perspective view of the connector housing according to the fourth embodiment. FIG. 10 is a perspective view of the connector according to the fifth embodiment. FIG. 11 is a side view showing a state before the electric wire holder is attached. FIG. 12 is a side view showing a state after the electric wire holder is attached. FIG. 14 is an exploded perspective view showing a conventional connector. FIG. 14 is a side view of the same assembled state. Description]
DESCRIPTION OF SYMBOLS 1 ... Connector housing 4 ... Standing wall 5 ... Insertion groove 7 ... Slot part 8 ... Narrow part (locking means)
10A to 10E: holding plate (locking means)
11 Clamp (holding means)
16 ... pressure receiving surface 17 ... insertion hole

Claims (4)

A connector provided with a wire retainer for forcing an electric wire drawn from a back surface of the connector housing to be bent along the back surface,
The electric wire holder includes a holding unit that binds and holds the electric wire, and an engaging unit that releasably locks to the back surface of the connector housing and resists a wire pulling force ,
An upright wall flush with the back surface is provided upright on the back surface of the connector housing, and the locking means is locked on the upright wall, while the locking means abuts on the inner surface of the upright wall. A connector provided with an electric wire holder characterized by resisting the electric wire pulling force. An insertion groove is cut out from the edge of the upright wall, while the locking means is formed with a narrow portion that can be inserted into the insertion groove from the entrance side, and the insertion portion is formed in the narrow portion. 2. A connector provided with an electric wire holder according to claim 1, wherein the pressure receiving surface for receiving a pulling force on the electric wire is continuous by being formed wider than the groove and abutting against the inner surface of the upright wall. . The upright wall is formed with an insertion hole penetrating therethrough. On the other hand, the wire holder is provided with a shaft portion that can be inserted into the insertion hole and is provided in an overhanging shape on the shaft portion, and the diameter of the insertion portion is reduced. A flange piece that can penetrate the hole, and after passing through the through hole, expands in diameter and abuts against the inner surface of the upright wall to receive a pulling force of the electric wire is formed. A connector comprising the electric wire holder according to claim 1. The throat part which can control insertion of a narrow part after passing through a narrow part is formed in the entrance part of the insertion slot, but a narrow part is permitted. Connector equipped with an electric wire holder.

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