JP2014235786A - Connector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a connector improving sealability.SOLUTION: A connector is equipped with a connector body fitted with a fixed portion, a strain relief installed to a rear end portion of the connector body and supporting a cable inserted in the connector body, and an annular seal member installed on an outer periphery of the connector body and interposed between the fixed portion and a fitting surface of the connector body portion. On the seal member, a tongue-shaped rotation preventive portion extending toward a rear end side of the connector body is formed. On the connector body, a recessed engaging portion for engaging the rotation preventive portion is formed. On the strain relief, a claw portion extending to a tip end side of the connector body and retaining the rotation preventive portion is formed.

Description

  The present invention relates to a connector having a sealing property.

  For example, a connector described in Patent Document 1 is known as a connector including a connector main body that is fitted in a hole of a case, and a seal member that seals a fitting surface of the hole and the connector main body.

JP 2010-123329 A

In the connector described in Patent Document 1, an annular seal member mounted on the outer periphery of the connector body is interposed between the hole of the case and the fitting surface of the connector body, and seals the fitting surface. Further, in order to prevent the annular seal member from rotating and the sealing performance of the fitting surface from deteriorating, a convex rotation prevention portion is formed on the seal member, and the rotation prevention portion is engaged. An engaging part is formed in the connector body, and the rotation of the seal member is prevented by these engagements.
However, when the connector body is fitted into the hole of the case, if a twisting force or a twisting force acts on the connector body, the annular seal member attached to the connector body is elastically deformed and the seal member is lifted, There is a possibility that the convex rotation preventing portion engaged with the engaging portion of the connector main body rides on the engaging portion and the seal member rotates.

  The present invention has been made in view of such problems, and an object of the present invention is to provide a connector with improved sealing performance by suppressing a decrease in sealing performance due to rotation of the sealing member.

  A connector according to the present invention includes a connector main body that is fitted to a fixed portion, a strain relief that is attached to a rear end portion of the connector main body and supports a cable that passes through the connector main body, and an outer periphery of the connector main body An annular seal member interposed between the fixed portion and the fitting surface of the connector main body, and the seal member includes a tongue-shaped anti-rotation portion extending toward the rear end side of the connector main body. And the connector body is formed with a concave engaging portion for engaging the rotation preventing portion, and the strain relief extends toward the distal end side of the connector body, A claw portion for pressing the rotation preventing portion is formed.

  That is, in the connector according to the present invention, the rotation preventing portion is pressed against the engaging portion by the claw portion of the strain relief. As a result, when the connector body is fitted into the case, a torsional force or a twisting force acts on the connector body, and even if the annular seal member attached to the connector body is elastically deformed and floats, the connector body The anti-rotation part engaged with the engaging part does not ride over the engaging part, and the seal member can be prevented from rotating.

  Note that at least two claw portions may be formed, and each claw portion may be disposed at a symmetrical position with respect to the central axis of the connector main body extending in the connector fitting direction.

  In such an aspect, the annular seal member mounted on the outer periphery of the connector main body can be pressed evenly.

  ADVANTAGE OF THE INVENTION According to this invention, it is possible to provide the connector which prevented the fall of the sealing performance by rotation of a sealing member, and improved the sealing performance.

It is a disassembled perspective view of the connector which concerns on one Embodiment of this invention. It is a top view of the connector. It is the side view, front view, and back view of the connector. FIG. 3 is a side sectional view taken along line AA ′ in FIG. 2 and a side sectional view taken along line BB ′. It is a perspective view at the time of attachment of the connector.

  Hereinafter, a connector according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

  1 is an exploded perspective view of a connector according to an embodiment of the present invention, FIG. 2 is a plan view of the connector, FIG. 3A is a side view of the connector, FIG. 3B is a front view, FIG. 4C is a rear view, FIG. 4A is a side cross-sectional view cut along the line AA ′ in FIG. 2, and FIG. 4B is a side cross-sectional view cut along the line BB ′.

  A connector 1 according to an embodiment of the present invention includes a connector main body (shield case) 5 fitted to a fixed portion (see FIG. 5), and a cable that is attached to the rear end of the connector main body and passes through the connector main body. 11, a strain relief 7 that supports 11, and an annular seal member 6 that is attached to the outer periphery of the connector main body and is interposed between the fixed portion and the fitting surface of the connector main body portion.

  A terminal 12 is fixed by crimping to the tip of the cable 11. As shown in FIGS. 3C and 4B, the cable 11 includes a core wire 111 that is electrically connected to the terminal 12 at the end of the cable, an insulating inner coating 112 that covers the core wire 111, and an inner coating. 112 is a shielded wire including a braided wire 113 covering 112 and an insulating outer covering 114 covering the braided wire 113.

  Each cable 11 includes a wire seal 2 that forms a seal with an inner peripheral surface of a connector body 5 described later, a ferrule 3 that caulks the braided wire 113, and a sleeve 4 that covers the distal end side of the ferrule 3. It is installed.

  As shown in FIG. 4B, the inner coating 112 and the outer coating 114 are partially removed at the tip of the cable 11. The terminal 12 is attached to the portion where the inner coating 112 and the outer coating 114 are removed and the core wire 111 is exposed. In the portion where the outer covering 114 has been removed, the braided wire 113 is folded back toward the outer covering 114 covering portion. In the vicinity of the end of the outer covering 114, the braided wire 113 is folded back and fixed by the ferrule 3. A front end portion of the ferrule 3 is covered with a sleeve 4, and a wire seal 2 is attached to the rear side of the ferrule 3. A cable 11, a wire seal 2, a ferrule 3 and a sleeve 4 are accommodated in a connector main body 5 (shield case), and a strain relief for supporting the cable 11 inserted through the connector main body at the rear end portion of the connector main body 5. 7 is mounted. An annular seal member 6 is attached to the outer periphery of the connector body 5.

  As shown in FIGS. 1 and 2, the connector main body 5 includes an outer peripheral portion 51 fitted in a fixed portion (oval hole), and a holding portion that covers the cable 11, the wire seal 2, and the like. 52 and a fixing portion 53 that fixes the positional relationship between the connector and the fixed portion. In the present embodiment, the holding portion 52 is configured by arranging three cylindrical portions that cover a part of the cable 11 in parallel. In such a configuration, it is possible to hold three cables, but the present invention can be applied to a connector that handles any number of cables.

  Moreover, the outer peripheral part 51 is formed in the ellipse shape penetrated by the holding | maintenance part 52, and the groove part 51a and the engaging part 51b are formed in the outer peripheral part. The groove 51a is provided along the outer periphery of the outer peripheral portion 51 over the entire periphery. In this embodiment, the engaging portion 51b is formed by a notch formed in the outer peripheral portion 51, and is formed from the portion corresponding to the gap 51a between the adjacent cables 11 toward the rear end of the cable 11. . Accordingly, in the present embodiment, the groove 51a is formed so that a seal portion 61 (to be described later) of the seal member 6 is disposed, and the engaging portion 51b contacts the rotation prevention portion 62 (to be described later) of the seal member 6 from two directions. Formed from sidewalls. However, the groove 51a may be formed so that the seal member 6 can be fixed in the front-rear direction, and the engaging portion 51b may be formed so as to be able to fix the seal member 6 in the rotational direction, and can be appropriately changed according to the shape of the seal member 6. is there. Further, a strain relief fixing portion 52a for fixing the strain relief 7 in the front-rear direction is formed on the rear end side of the holding portion 52. In the present embodiment, the strain relief fixing portion 52a is configured from an opening.

  The seal member 6 is fitted in the groove 51a of the connector body 5 and is formed in a tongue-like shape with a seal part 61 interposed between the oval hole part and sealing between the two, and the seal part 61 And a rotation preventing portion 62 that extends in the rear end direction and is engaged with the engaging portion 51b. The outer peripheral surface of the seal part 61 is formed in a bellows shape for ensuring waterproofness and facilitating the mounting operation. That is, a portion corresponding to the wrinkle on the outer periphery of the seal portion 61 is crushed by a predetermined amount on the outer wall, thereby ensuring a sealing property. The rotation preventing part 62 protrudes from the portion corresponding to the space between the cables 11 on the outer periphery of the seal part 61 in the rear end direction, and is fitted to the engaging part 51b. Therefore, when a force acts in the rotation direction of the seal member 6, the rotation prevention unit 62 and the two side walls constituting the engagement portion 51b come into contact with each other, whereby rotation can be suitably prevented.

  In the present embodiment, the engaging portion 51b is formed from two side walls, and no side wall is formed at the rear end portion of the rotation preventing portion. Further, the rotation preventing portion 62 is formed with a recess 62a into which a later-described claw portion 72 of the strain relief is fitted.

  The strain relief 7 is composed of an upper part 7a and a lower part 7b, and is fixed to the connector body 5 by sandwiching the cable 11 from above and below and then pressing it in the distal direction. In addition, the upper portion 7a and the lower portion 7b are formed with a fixing portion 7c having unevenness, and are fixed in the front-rear direction and the left-right direction by the fixing portion 7c. The strain relief 7 holds the cable 11 inserted through the connector main body 5 and is formed in a bending stress relaxation portion 71 for relaxing the bending stress of the cable 11 and a tongue piece extending from the bending stress relaxation portion 71 in the distal direction. And a claw portion 72 that holds down the rotation preventing portion 62 of the seal member 6.

  As shown in FIGS. 1 and 4B, the bending stress relaxation portion 71 extends in the distal direction of the shield 1 so as to be inserted between the cable 11 and the connector body 5, and holds the outer covering 114 of the cable 11. A plurality of cable holding portions 711 are provided. The bending stress relaxation portion 71 is formed so as to hold the connector body 5 from the outer periphery and the strain relief fixing claw 712 extending in the distal direction of the shield 1 so as to be inserted between the cable 11 and the connector body 5. And a sandwiching portion 713. The cable holding portion 711 and the holding portion 713 are fixed in the vertical direction by holding the wall portion of the connector body 5. Further, the strain relief fixing claw 712 is inserted between the cable 11 and the connector main body 5, and the claw portion formed on the outer peripheral portion is fitted to the strain relief fixing portion 52 a of the connector main body 5. Thereby, the entire strain relief 7 is fixed to the connector body 5. When the strain relief 7 is removed from the connector body, the nail portion is pressed from the outside of the connector body 5 via the strain relief fixing portion 52a, and the entire strain relief 7 is moved from the state toward the rear end of the cable 11. It is possible to remove the strain relief 7 by moving it.

  In this embodiment, the strain relief fixing claw 712 is provided only on the upper portion 7a of the strain relief 7, but it is naturally possible to provide it on both the upper portion 7a and the lower portion 7b. In this case, it is conceivable to provide the strain relief fixing portion 52a also in the corresponding portion of the connector body 5.

  As shown in FIG. 4A, the claw portion 72 extends from the portion corresponding to the bending stress relaxation portion 71 between the cables 11 in the distal direction and fits into the concave portion 62 a of the rotation prevention portion 62 of the seal member 6. Is done. Thereby, it is possible to prevent the rotation preventing portion 62 from being lifted when the connector is attached. Moreover, in this embodiment, the part which faces the said inner periphery of the said hole part of the rotation prevention part 62 and the nail | claw part 72 is formed so that the same plane may be formed. Therefore, deformation of the seal member 6 or the like is not caused when the connector is attached, and the connector can be smoothly attached to the hole.

Next, how the connector according to this embodiment is attached will be described. FIG. 5 is a perspective view when the connector according to the present embodiment is attached. In FIG. 5, the connector 1 according to this embodiment is attached to the housing 8.
The housing 8 includes a fixed portion 81 that is an oval hole into which a distal end portion of the connector is inserted, and a female screw portion 82 in which a female screw is formed. Further, the fixed portion 81 is formed with connection holes 81b according to the number of cables 11 held by the connector. At the time of attachment, the distal end portion of the cable 11 is inserted into the connection hole 81b, and then the outer peripheral portion 51 of the connector main body 5 is press-fitted into the fixed portion 81. Since the seal member 6 contacts the inner peripheral wall 81a of the fixed portion 81, a resistance force is generated during the press-fitting. Here, in this embodiment, even if a twisting force or a twisting force acts on the connector main body 5, the rotation preventing portion 62 of the seal member 6 is engaged with the engaging portion 51 b by the claw portion 72 of the strain relief 7 as described above. Therefore, the rotation of the seal member 6 can be prevented without releasing the engagement between the rotation preventing portion 62 and the engaging portion 51b. Next, the fixing portion 53 of the connector main body 5 and the female screw portion 82 of the housing 8 are screwed with the screws 9, and the connector is fixed to the housing 8.

DESCRIPTION OF SYMBOLS 1 ... Connector, 2 ... Wire seal, 3 ... Ferrule, 4 ... Sleeve, 5 ... Connector main body, 6 ... Seal member, 7 ... Strain relief, 8 ... Housing, 9 ... Screw, 11 ... Cable, 12 ... Terminal, 51 ... outer peripheral part, 51a ... groove part, 51b ... engaging part, 52 ... holding part, 52a ... strain relief fixing part, 61 ... seal part, 62 ... anti-rotation part, 62a ... concave part, 71 ... bending stress relaxation part, 72 ... Claw part, 81 ... fixed part, 81a ... connection hole, 82 ... female screw part, 111 ... core wire, 112 ... inner covering, 113 ... braided wire, 114 ... external covering, 711 ... cable holding part, 712 ... strain relief fixing claw , 713 ... clamping part.

Claims (2)

A connector body to be fitted to the fixed part;
A strain relief attached to the rear end of the connector body and supporting a cable inserted through the connector body;
An annular seal member attached to the outer periphery of the connector main body and interposed between the fixed portion and the fitting surface of the connector main body portion;
The seal member is formed with a tongue-like rotation preventing portion extending toward the rear end side of the connector main body, and the connector main body has a concave engaging portion for engaging the rotation preventing portion. Formed,
Furthermore, the said strain relief is formed with the nail | claw part which extends toward the front end side of the said connector main body, and hold | suppresses the said rotation prevention part. The connector according to claim 1, wherein at least two claw portions are formed, and each claw portion is disposed at a symmetrical position with respect to a central axis of a connector main body extending in a connector fitting direction.

Images