JP3750267B2 - connector - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a connector including a cover that covers an extension portion of an electric wire from a connector housing.
[0002]
[Prior art]
Insert a terminal fitting connected to the end of the wire into the connector housing as a connector used to connect the wire to the computer and its peripherals, and then cover the extension of the wire into this connector housing. And has a structure in which the wire is passed through the cover.
[0003]
[Problems to be solved by the invention]
In the above conventional connector, since the electric wire extending from the connector housing is simply passed through the cover, the electric wire is connected to the connector housing and the cover when the connector is attached to or detached from the computer or peripheral device. Easily move in the axial direction, and as a result, the electric wire is excessively pulled or conversely bent excessively. In addition, the wire may rotate around the axis with respect to the connector and the cover. In this case, the wire is excessively twisted, or the terminal fitting is tilted together with the wire and the terminal fitting is prevented from being pulled out of the connector housing. May be released.
The present invention has been invented in view of the above circumstances, and has an object to regulate the play of the electric wire with respect to the connector housing.
[0004]
[Means for Solving the Problems]
The invention of claim 1 includes a connector housing, a terminal fitting attached to the connector housing, an electric wire connected to the terminal fitting and extending from the connector housing, and an electric wire extending portion with respect to the connector housing. And a cover that is attached so as to cover and penetrate the electric wire, and a holder that is formed in a ring shape and is accommodated in the cover is fixed to the electric wire, and front and rear at both ends in the axial direction of the holder pair of flanges are formed on the outer periphery of said pair of flanges, respectively, the two notches is being formed, said cutout portion formed in the front side of the flange, are formed on the flange of the rear the notch has have been arranged at a position such that it can see through each other in the axial direction, the inner periphery of the cover, the front and rear And two ribs elongated in direction, and the elastic locking piece resiliently deformable outward in a form extending in a cantilever are formed, the elastic latching pieces rearward out of the pair of flanges By engaging the flange, the relative displacement of the holder and the cover in the electric wire axial direction is restricted, and the rib engages both the front notch and the rear notch. By doing so, the relative rotation of the holder and the cover around the wire axis is restricted.
[0005]
According to a second aspect of the present invention, the holder is formed with a biting hole capable of regulating the axial movement of the holder and the electric wire and the movement around the axis by biting into the outer periphery of the electric wire. did.
[0006]
[Action and effect of the invention]
<Invention of Claim 1>
Since the holder is fixed to the electric wire and the cover is attached to the connector housing, when the flange of the holder and the elastic locking piece of the cover are engaged , the relative displacement in the axial direction of the electric wire with respect to the connector housing is restricted. The Therefore, even if an axial tensile force acts on the electric wire, it is possible to prevent excessive stress from being generated in the electric wire, the connecting portion between the electric wire and the terminal fitting, or the like. Further, even if an axial pushing force acts on the electric wire, the electric wire is prevented from being excessively bent with the connector housing.
[0007]
Further, when the notch portion of the flange of the holder and the rib of the cover are engaged , the relative rotation of the electric wire around the axis with respect to the connector housing is restricted. Therefore, even if an external force in the rotating direction acts on the electric wire, the electric wire is prevented from being twisted, or the terminal fitting is tilted together with the electric wire and the restriction of the terminal fitting being removed from the connector housing is released.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
<Embodiment 1>
A first embodiment of the present invention will be described below with reference to FIGS.
The connector of this embodiment includes a connector housing 10, a terminal fitting 20, an electric wire 30, a cover 40 and a holder 50.
A plurality of chamber cavities 11 are formed inside the connector housing 10, and terminal cavities 20 are accommodated in the respective cavities 11 by being inserted from openings on the back surface of the connector housing 10. It is kept in the omission control state. Before the insertion into the cavity 11, the terminal of the electric wire 30 is previously connected to the rear end of each terminal metal fitting 20 by crimping. In a state where the terminal fitting 20 is inserted into the cavity 11, the electric wire 30 extends from the back surface of the connector housing 10.
[0009]
Here, the electric wire 30 will be described. The electric wire 30 has a known structure in which the outer periphery of a conductor formed by twisting metal thin wires is covered with a resin core. A plurality of electric wires 30 extending from the back surface of the connector housing 10 are bundled together, and the outer periphery of the bundle of the electric wires 30 is surrounded by a shield layer 31 in which metal thin wires are knitted into a cylindrical net shape. The outer periphery is covered with a rubber sheath 32, so that one cable 33 is formed. At the end of the cable 33, the sheath 32 is peeled off to expose the shield layer 31, and the exposed shield layer 31 is folded to cover the outer periphery of the sheath 32. The plurality of electric wires 30 extend in a radially distributed manner from the folded portion of the shield layer 31 toward the connector housing 10.
In the accompanying drawings, if all the electric wires 30 are displayed, the drawing becomes complicated and the individual electric wires 30 may be obscured, so that only one or two electric wires 30 are shown and other electric wires are shown. 30 is omitted.
[0010]
A holder 50 for restricting loose movement of the electric wire 30 with respect to the cover 40 is attached to the cable 33 constituted by the plurality of electric wires 30. The holder 50 has a wide ring shape made of metal, and a notch is formed in a part in the circumferential direction so that the holder 50 can be expanded and deformed. The inner diameter of the holder 50 not attached to the cable 33 is set to be slightly larger than the outer diameter of the cable 33. The holder 50 is fitted so as to be in close contact with the outer periphery of the sheath 32 of the cable 33.
The holder 50 can be attached by inserting the bundle of the wires 30 through the holder 50 and connecting the holder 50 to the outer periphery of the cable 33 while expanding the holder 50 slightly before connecting the terminal fitting 20 to the wires 30. That's fine.
The holder 50 is formed with an oval bite hole 51 penetrating from the inner circumference to the outer circumference, and the bite hole 51 exerts a bite function with respect to the outer circumference of the sheath 32 of the cable 33, and this bite function Thus, the holder 50 is restricted from moving in the axial direction and around the axis with respect to the cable 33 and the electric wire 30.
[0011]
A pair of front and rear flanges (an axial displacement restricting portion which is a constituent feature of the present invention) 52 are formed at both end edges in the axial direction of the holder 50. The flange 52 is engaged with an elastic locking piece 45 of the cover 40, which will be described later, in an axial relative displacement restricting state.
Each flange 52 is formed with two notches 53 (rotation restricting portions, which are constituent elements of the present invention) 53 at a pitch of approximately 180 degrees. The notch 53 of the front flange 52 and the notch 53 of the rear flange 52 are arranged at positions aligned so as to be able to see through each other in the axial direction. Forty ribs 48 are engaged in a relative rotation restricting state around the axis.
[0012]
Next, the cover 40 will be described.
The cover 40 has a rectangular tube shape that opens on both front and rear surfaces as a whole. The cover 40 is fitted to the outer periphery on the back side of the connector housing 10 with the cable 33 passing therethrough. The cover 40 and the connector housing 10 are assembled together by engaging the locking hole 13. The cover 40 covers the back surface of the connector housing 10 from which the electric wire 30 extends, the portion of the electric wire 30 that is exposed from the end of the cable 33, and the end portion of the cable 33.
[0013]
A fitting hole 42 is formed in the rear part of the inner periphery of the cover 40, and the cable 33 is passed through the fitting hole 42 almost tightly before the holder 50 is fixed. In front of the fitting hole 42, there is formed a holder housing chamber 43 having a diameter larger than that of the fitting hole 42 and having a circular shape with which the flange 52 can be fitted almost tightly as shown in FIG. A holder 50 is accommodated in the holder accommodating chamber 43.
A pair of left and right recesses 44 are formed on the inner periphery of the holder housing chamber 43, and each of the recesses 44 is formed with an elastic locking piece 45 (an axial displacement restricting portion which is a component of the present invention). Yes. This elastic locking piece 45 is cantilevered from the front end position of the holder accommodating chamber 43 toward the rear, and can be elastically bent outward. An engagement protrusion 46 that protrudes in a wedge shape is formed on the inner surface of the elastic locking piece 45, and the engagement protrusion 46 is orthogonal to the axial direction of the cable 33 and forward of the flange 52 on the rear side of the holder 50. An engaging surface 46A that engages from the engaging surface 46A is formed, and a guiding inclined surface 46B that is inclined from the engaging surface 46A toward the inner surface of the elastic locking piece 45 is formed. In addition, the inner end surface of the holder housing chamber 43 (the peripheral edge of the opening of the fitting hole 42) is a receiving surface that engages from the rear with respect to the rear end surface of the holder 50 (an axial displacement regulating portion that is a constituent feature of the present invention) 47.
The holder accommodating chamber 43 is formed with a pair of upper and lower ribs (rotation restricting portions which are constituent elements of the present invention) 48 protruding from the inner periphery toward the center. The ribs 48 are elongated in the front-rear direction, and are fitted into the notch portions 53 on both the front and rear sides of the holder 50.
[0014]
When the connector is assembled, the cable 33 is passed through the cover 40, the holder 50 is fitted into the cable 33, the terminal fitting 20 is connected to the electric wire 30, the terminal fitting 20 is inserted into the connector housing 10, and the cover 40 The operation is performed in the procedure of attaching the connector housing 10 to the connector housing 10. When the cover 40 is attached to the connector housing 10, the holder 50 is previously positioned on the cable 33 according to the cover 40. Thereby, in a state where the cover 40 is attached to the connector housing 10, the rib 48 and the notch 53 are fitted, and the rear flange 52 is engaged with the elastic locking piece 45 and the receiving surface 47. . Further, when the holder 50 is accommodated in the holder accommodating chamber 43, the elastic locking piece 45 is elastically bent so as to be retracted outward by engaging the guide slope 46B with the flange 52 on the rear side. The holder 50 is smoothly accommodated in the holder accommodating chamber 43.
[0015]
In the state where the connector is assembled in this way, the rear surface of the holder 50 abuts against the receiving surface 47, so that the relative movement of the holder 50 relative to the cover 40 is restricted, and the rear flange 52 is elastically engaged. The forward relative movement of the holder 50 with respect to the cover 40 is restricted by engaging with the locking projection 46 of the stop piece 45. Since the holder 50 is integrally fitted to the cable 33 and the cover 40 is attached to the connector housing 10, the relative displacement in the axial direction of the cable 33 with respect to the connector housing 10 is eventually restricted.
Therefore, even if an axial tensile force acts on the cable 33, excessive stress may be generated in the electric wire 30, the connection portion between the electric wire 30 and the terminal fitting 20, the engaging portion between the terminal fitting 20 and the lance 12, and the like. Is prevented. Further, even if an axial pushing force acts on the cable 33, the electric wire 30 is prevented from being excessively bent with respect to the back surface of the connector housing 10.
[0016]
Similarly, in the state where the connector is assembled, the rib 48 of the cover 40 is fitted to the notch 53 of the holder 50, so that the rotation of the holder 50 around the axis relative to the cover 40, that is, the axis of the cable 33 relative to the connector housing 10 is achieved. The relative rotation around is restricted.
Therefore, even if an external force in the rotation direction acts on the cable 33, the cable 33 is not rotated or twisted. As a result, the electric wire 30 is twisted inside the cover 40, or the terminal fitting 20 together with the electric wire 30. Is prevented from being tilted in the connector housing 10 and releasing the restriction of the terminal fitting 20 being released.
[0017]
In this embodiment, since the holder 50 has a shape that is symmetrical in the front-rear direction, even if the holder 50 is reversed and attached to the cable 33, both the axial movement restriction of the cable 33 with respect to the cover 40 and the rotation restriction around the axis are restricted. Is possible.
[0018]
<Other embodiments>
The present invention is not limited to the embodiment described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention, and further, within the scope not departing from the gist of the invention other than the following. Various modifications can be made.
[0019]
(1) In the above embodiment, the holder is made of metal, but it can be made of resin.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a state where an electric wire and a cover are separated from a connector housing in Embodiment 1. FIG. 2 is a perspective view of a holder. FIG. 3 is a horizontal sectional view in an assembled state. [Fig. 5] Longitudinal sectional view of the assembled state [Fig. 6] Vertical sectional view of the separated state [Fig. 7] Cross sectional view of the assembled state [Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 ... Connector housing 20 ... Terminal metal fitting 30 ... Electric wire 40 ... Cover 45 ... Elastic locking piece (Axial displacement control part of a cover)
47 ... Receiving surface (cover axial displacement restricting portion)
48 ... Rib (cover rotation restricting part)
50 ... Holder 52 ... Flange (Holder axial displacement restricting portion)
53 ... Notch (rotor restricting portion of holder)

Claims (2)

A connector housing; a terminal fitting attached to the connector housing; an electric wire connected to the terminal fitting and extending from the connector housing; and covering the electric wire extension portion of the connector housing and penetrating the electric wire With a cover that can be attached like
The electric wire has a ring shape and a holder accommodated in the cover is fixed,
A pair of front and rear flanges are formed at both ends in the axial direction of the holder ,
Two notches are respectively formed on the outer circumferences of the pair of flanges , and the notches formed in the front flange and the notches formed in the rear flange are mutually connected. It is placed in a position where you can see in the direction,
Two ribs elongated in the front-rear direction and an elastic locking piece that extends in a cantilevered manner and can be elastically bent outward are formed on the inner periphery of the cover ,
The elastic locking piece is engaged with the flange on the rear side of the pair of flanges, thereby restricting relative displacement of the holder and the cover in the electric wire axis direction,
The rib is engaged with both the front notch and the rear notch so that relative rotation of the holder and the cover around the electric wire axis is restricted.   The bite hole which can control the play of the direction of an axis of the holder and the electric wire, and the play around an axis by biting into the perimeter of the electric wire is formed in the holder. Connector.

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