JP5056639B2 - connector - Google Patents

Description

  The present invention relates to a connector attached to a case.

  2. Description of the Related Art Conventionally, as a connector used by being attached to a case, a connector having an inner housing attached to an attachment hole formed in the case and an outer housing attached to the opposite side of the inner housing from the case is known. ing. The connector is attached to the case by fixing the outer housing to the case.

For example, a connector described in Patent Document 1 is a connector that is connected to a device housed in a shield case. A housing (inner housing) is pressed against a seal ring that surrounds a mounting hole, and a shield shell (outer The housing is fixed to the case by bolting the housing. As a result, the housing is held in a state of being attached to the case, and the housing and the case are sealed by the seal ring.
JP 2006-31961 A

  However, in the structure as described above, since the housing is held by the elastic force of the seal ring, there is a concern that it will rattle due to vibration. Since the shakiness of the housing may cause a decrease in sealing performance, a countermeasure has been desired.

  The present invention has been completed based on the above circumstances, and an object thereof is to provide a connector capable of preventing the inner housing from rattling.

  The connector of the present invention is mounted on the opposite side of the inner housing from the inner housing, which is attached to the case in a state sandwiched between the sealing member surrounding the mounting hole of the case and the case, An outer housing fixed to the case in a state in which the inner housing is pressed against the case; and a fastening member that fastens a locking portion of the inner housing to a locked portion of the outer housing. Have According to such a configuration, since the inner housing is fixed to the outer housing, it is possible to prevent rattling of the inner housing.

  The locking portion and the locked portion may be provided at a position outside the seal member. Thereby, it is not necessary to provide a seal structure in the locking portion and the locked portion.

The fastening member may be a screw. Thereby, since a latching | locking part and a to-be-latched part are fixed by clamping | tightening of a screw, durability is high.
And the said fastening member is good also as what is inserted in the said to-be-latched part side from the said latching | locking part side. Accordingly, the inner housing can be fixed to the outer housing by tightening the screw on the locked portion of the outer housing.

  ADVANTAGE OF THE INVENTION According to this invention, the connector which can prevent rattling of an inner housing can be provided.

Embodiments of the present invention will be described below with reference to FIGS.
The connector C in the present embodiment is a device connector that supplies electric power to a device (not shown) (for example, a motor or an inverter mounted on a hybrid vehicle or the like). In the following, each component will be described with the upper side in FIG. 1 as the upper side, the lower side as the lower side, the left side as the front, and the right side as the rear. The device is housed in a metal case K having a shielding function, and a mounting hole H is formed through the case K.

  The connector C includes a housing 10 (corresponding to the inner housing of the present invention) that is attached to the mounting hole H of the case K with a seal ring 18 (corresponding to the sealing member of the present invention) sandwiched between the connector C and the case K. Yes. The housing 10 is made of synthetic resin, and has a main body portion 11 attached in a posture penetrating in the inner and outer directions of the case K in the attachment hole H, and a flange portion 12 arranged substantially parallel to the wall surface of the case K. Yes.

  The main body portion 11 of the housing 10 is formed in a laterally long, substantially rectangular parallelepiped shape, and is arranged on the inner side of the case K so as to protrude rearward from the rear surface of the flange portion 12 and the outer main body portion 11A. And an inner main body portion 11B. The outer main body 11A has a substantially box shape with a hollow inside, and a wire-side connector (not shown) can be fitted from the front.

  Three terminals 13 are held in the housing 10. Each terminal 13 has an outer connecting portion 13A that is electrically connected to the electric wire side connector and an inner connecting portion 13B that can be connected to a terminal on the device side (not shown). The outer connecting portions 13A are arranged side by side inside the outer main body portion 11A, and the inner connecting portions 13B are arranged side by side on the inner main body portion 11B (see FIGS. 2 and 3). Bolt holes 14A and 14B are formed in each outer connection portion 13A and each inner connection portion 13B, respectively. Terminals of the electric wire side connector are provided in the outer connection portion 13A, and each inner connection portion 13B is provided on the device side. The terminals are firmly connected by bolting. The three terminals 13 are integrated with the housing 10 by insert molding.

  The flange portion 12 has a plate shape projecting outward from the entire circumference of a substantially intermediate position in the front-rear direction of the main body portion 11. When viewed from the front-rear direction, the flange portion 12 has a horizontally long rectangular shape as a whole, and the main body portion 11 is provided at a position near one end in the longitudinal direction (rightward in FIG. 3).

  Ribs 15 are provided on the rear surface of the flange portion 12 (the surface facing the wall surface of the case K). The rib 15 is provided substantially parallel to the outer peripheral edge on the inner side of the outer peripheral edge of the flange portion 12, and is formed over the entire periphery of the flange portion 12. Between the outer peripheral edge of the flange portion 12 and the rib 15, an interval substantially the same as the width dimension of a seal ring 18 described later is provided, and the peripheral portion of the flange portion 12 (between the outer peripheral edge and the rib 15). Part) is a mounting portion 16 to which the seal ring 18 is mounted. The rib 15 is formed in a shape recessed toward the inner peripheral side at a plurality of locations in the circumferential direction, and an engagement convex portion 17 that engages with the seal ring 18 attached to the attachment portion 16 is formed in the recessed portion. Projecting backward.

  The seal ring 18 is made of rubber, and has a ring shape with a size that encloses the entire circumference of the mounting hole H (size along the outer circumference of the rib 15). The seal ring 18 has a constant thickness dimension over the entire circumference, and its front surface and rear surface are substantially parallel and flat. On the inner peripheral side of the seal ring 18, an engagement concave portion 19 that can be engaged with the engagement convex portion 17 of the flange portion 12 is provided. The engaging recess 19 is a hole that penetrates the seal ring 18 in the thickness direction.

  The flange portion 12 is provided with a locking portion 21 that is fastened to a locked portion 36 of a shield shell 30 (corresponding to the outer housing of the present invention) described later by a screw S (fastening member). The locking portions 21 are provided so as to protrude from the mounting portion 16 to the outer peripheral side at two locations above and below the flange portion 12. The upper locking portion 21 is disposed almost directly above the central position of the main body portion 11 in the longitudinal direction, and the lower engaging portion is shifted from the main body portion 11 to the side (the other side in the longitudinal direction). It is arranged below.

  An intermittent rib 22 extending in the direction along the outer periphery of the mounting portion 16 (the portion excluding the locking portion 21 among the outer peripheral edges of the flange portion 12) is provided at the base portion of each locking portion 21. The intermittent rib 22 extends along the outer peripheral side of the seal ring 18 attached to the attachment portion 16.

  Each locking portion 21 is integrally provided with a metal cylinder member (collar 23) by insert molding (see FIG. 1). The collar 23 is embedded in the flange portion 12 in a posture in which the shaft hole 24 is directed straight in the front-rear direction (substantially orthogonal to the plate surface of the flange portion 12). The axial dimension of the collar 23 is substantially the same as the thickness dimension of the flange portion 12. A groove portion 25 is formed on the outer periphery of the collar 23 and is firmly fixed to the flange portion 12, and a sufficient retaining force is secured against the axial force acting on the collar 23. The shaft hole 24 of the collar 23 is slightly larger than the diameter of the screw S.

  The connector C includes a shield shell 30 that is attached to the front side of the housing 10 (the side opposite to the case K). The shield shell 30 is made of aluminum die-casting, has a horizontally long, substantially rectangular shape that is slightly larger than the flange portion 12 as a whole, and covers almost the entire front surface of the flange portion 12. The substantially entire shield shell 30 is disposed substantially parallel to the wall surface of the case K.

  On the rear surface of the shield shell 30, an accommodation recess 31 that can accommodate the flange portion 12 is formed as a recess. The housing recess 31 has a shape that conforms to the outer shape of the flange portion 12, and the recess size is such that the rear surface of the seal ring 18 projects rearward from the rear surface of the shield shell 30 when the flange portion 12 is housed. Has been. The peripheral wall 31A of the housing recess 31 of the shield shell 30 covers the entire circumference of the flange portion 12 housed in the housing recess 31 and extends along the outer periphery of the seal ring 18 attached to the flange portion 12 over substantially the entire circumference. .

  A protrusion 32 is provided in the housing recess 31. The protruding portion 32 is formed in a horizontally long rectangular shape extending continuously in parallel with the peripheral wall 31 </ b> A of the housing recess 31. When the flange portion 12 is accommodated in the accommodating recess 31, the protrusion 32 is in a positional relationship in which the mounting portion 16 contacts the mounting portion 16 from the front.

  The shield shell 30 has an opening 33 having a size along the outer shape of the outer main body 11A of the housing 10 (see FIG. 2). The opening 33 is provided at a position closer to one end (leftward in FIG. 2) than the center position in the longitudinal direction of the shield shell 30.

  A fixing portion 34 that is fixed to the case K is provided on the outer peripheral side of the housing recess 31 in the shield shell 30. Four fixing portions 34 are provided at substantially diagonal positions of the shield shell 30, and are formed by projecting the peripheral wall 31 </ b> A of the housing recess 31 to the side. Each fixing portion 34 is formed with a through hole 34 </ b> A that overlaps with a fixing hole (not shown) of the case K, and a metal bolt (not shown) inserted through each through hole 34 </ b> A is attached to the case K. The shield shell 30 is fixed to the case K so as to be conductive by being tightened in the fixing hole. Thereby, in a state where the housing 10 (flange portion 12) is pressed against the case K side, the shield shell 30 is fixed to the case K, and the seal ring 18 attached to the flange portion 12 is in close contact with the wall surface of the case K. The space between the peripheral edge of the mounting hole H of the case K and the housing 10 is sealed.

  Further, a screw tightening portion 35 for screwing an unillustrated wire-side shield shell is provided on the outer peripheral side of the housing recess 31 in the shield shell 30. The screw fastening portion 35 is formed by projecting the peripheral wall 31A of the housing recess 31 to the side, like the fixing portion 34.

  In the shield shell 30, a locked portion 36 is provided at a position corresponding to the locking portion 21 provided in the flange portion 12. The locked portion 36 is formed so as to partially widen the housing recess 31 outward, and has a shape surrounded by the peripheral wall 31 </ b> A of the housing recess 31. The locked portions 36 are provided at two locations on the upper and lower sides of the shield shell 30, and are positioned outside the mounting portion 16 of the flange portion 12 accommodated in the accommodating recess 31. The upper locked portion 36 is provided above a substantially central position in the longitudinal direction of the opening 33, and the lower locked portion 36 is shifted laterally (close to the other end in the longitudinal direction) from the opening 33. It is arranged on the lower side.

  Each locked portion 36 is provided with a protruding portion 37 that protrudes forward in a columnar shape, and a screw hole 38 into which the screw S is tightened is formed at the center of the protruding portion 37. The screw S is a self-tapping screw, and the screw hole 38 is a self-tapping hole. The screw hole 38 is formed to penetrate straight in the front-rear direction (opposite direction of the shield shell 30 and the flange portion 12) along the axis of the protruding portion 37.

  A portion of the rear surface of each locked portion 36 that faces the collar 23 of the flange portion 12 protrudes slightly rearward, and this portion contacts the collar 23 when the housing 10 is assembled to the shield shell 30. It is set as the contact part 39 (refer FIG. 1). The projecting dimension of the contact part 39 is smaller than the projecting dimension of the projecting part 37, and is substantially the same as the projecting dimension of the protrusion 32.

  The locked portion 36 of the shield shell 30 and the locking portion 21 of the housing 10 are fastened by a metal screw S. The screw S is inserted from the locking portion 21 side to the locked portion 36 side. Specifically, the screw S is inserted into the shaft hole 24 of the collar 23 of the locking portion 21 to be screw holes of the locked portion 36. 38 is screwed. Since the screw S is a self-tapping screw, the screw hole 38 of the locked portion 36 only needs to be opened, and tapping can be omitted, and the holding force is high and it is difficult to loosen.

Next, an assembling operation of the shield shell 30, the housing 10, and the seal ring 18 and an attaching operation of the connector C to the case K will be described.
First, the seal ring 18 is attached to the housing 10. The seal ring 18 is mounted on the mounting portion 16 so that the engagement convex portion 17 of the flange portion 12 is inserted into the engagement concave portion 19 of the seal ring 18. As a result, the seal ring 18 is mounted on the mounting portion 16 in a state in which displacement in the circumferential direction is prevented by the engagement of the plurality of engaging convex portions 17 and the engaging concave portions 19 and is held so as not to be detached. Is done.

  Next, the housing 10 is attached and fixed to the shield shell 30. The outer body 11 </ b> A of the housing 10 is fitted into the opening 33 of the shield shell 30, and the flange portion 12 is accommodated in the accommodation recess 31. Then, the front surface of the flange portion 12 abuts on the protrusion 32 of the shield shell 30, the front surface of the collar 23 abuts on the abutment portion 39, and the shaft hole 24 of the locking portion 21 is engaged with the shield shell 30. Are arranged in a straight line in the front-rear direction. The housing 10 is fixed to the shield shell 30 by inserting a screw S into the shaft hole 24 of each locking portion 21 from behind and tightening the screw S in the screw hole 38 of the locked portion 36. Here, since the shaft hole 24 of the locking portion 21 is formed by embedding the collar 23 in the flange portion 12, the shaft hole 24 has sufficient strength against a strong tightening force. The shield shell 30 and the housing 10 may be fixed first, and then the seal ring 18 may be attached.

  The connector C assembled in this way is attached to the case K. The fixing portion 34 of the shield shell 30 is aligned with the fixing hole of the case K so that the inner main body portion 11B of the housing 10 is inserted into the case K through the mounting hole H. Then, the shield shell 30 is pushed to the case K side so that the seal ring 18 is pressed against the wall surface of the case K, and a bolt is inserted into the through hole 34A of the fixing portion 34 and tightened to the fixing hole of the case K. Thereby, the shield shell 30 is fixed to the case K in a state in which the seal ring 18 is pressed and closely adhered to the case K and the flange portion 12 over the entire circumference.

According to the present embodiment configured as described above, the following effects can be obtained.
The connector C of the present embodiment includes a housing 10 that is attached to the mounting hole H with a seal ring 18 that surrounds the mounting hole H of the case K interposed between the case K and the housing 10 on the side opposite to the case K. A shield shell 30 that is mounted and fixed to the case K in a state where the housing 10 is pressed against the case K side, and a screw S that fastens the locking portion 21 of the housing 10 to the locked portion 36 of the shield shell 30. ing. Therefore, in a state where the connector C is attached to the case K, the housing 10 is fixed to the shield shell 30, so that it is possible to prevent the housing 10 from rattling due to vibration or the like.

Further, since the locking portion 21 and the locked portion 36 are provided outside the seal ring 18, it is not necessary to provide a separate sealing structure for the locking portion 21 and the locked portion 36. It is possible to prevent the structure from becoming complicated.
Moreover, since the latching | locking part 21 and the to-be-latched part 36 are fixed by clamping | tightening of the screw | thread S, since it is hard to loosen even if it uses for a long period of time, durability can be improved.

<Other embodiments>
The present invention is not limited to the embodiments 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.

  (1) In the above-described embodiment, the fastening member is the screw S. However, the present invention is not limited to this, and the fastening member may have any form as long as the locking portion of the inner housing can be fastened to the locked portion of the outer housing. For example, the fastening member may be a lock claw that is provided integrally with the locking portion or the locked portion and engages with the other side, or may be a rivet or the like.

  (2) In the above embodiment, the example in which the present invention is applied to the connector C in which the inner housing 10 is the resin housing 10 and the outer housing 10 is the metal shield shell 30 has been described. The present invention can also be applied to the case where both the inner housing and the outer housing are resin housings, for example.

Side sectional view of the connector according to this embodiment Front view Rear view

Explanation of symbols

C ... Connector H ... Mounting hole K ... Case S ... Screw (fastening member)
10. Housing (inner housing)
18 ... Seal ring (seal member)
21 ... Locking part 30 ... Shield shell (outer housing)
36: Locked part

Claims (4)

An inner housing that is attached to the case in a state of being sandwiched between the case and a seal member that encloses the attachment hole of the case;
An outer housing mounted on the opposite side of the case from the inner housing and fixed to the case with the inner housing pressed against the case;
And a fastening member for fastening the locking portion of the inner housing to the locked portion of the outer housing. The connector according to claim 1, wherein the locking portion and the locked portion are provided at positions outside the seal member. The connector according to claim 1, wherein the fastening member is a screw. The connector according to claim 3, wherein the fastening member is inserted from the locking portion side to the locked portion side.

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