JP6200379B2 - Connector and connector connection structure - Google Patents

Description

  The present invention relates to a connector having a sealing property and a connection structure of the connector.

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

JP 2011-060451 A

In the connector described in Patent Document 1, a shield shell is attached to the outer periphery of the connector body, and a bolt fastening portion extending from the shield shell is fixed to a wall near the mounting portion with a bolt. An annular seal member is attached to the outer periphery of the connector main body, and this seal member is interposed between the fitting portion and the fitting surface of the connector main body to seal the fitting surface.
However, when the bolt fastening direction is orthogonal to the fitting direction of the connector, fastening the bolt causes the outside of the connector to be biased in the bolt fastening direction, resulting in a bias in the sealing performance by the sealing member, and the sealing performance is reduced. There was a possibility.

  The present invention has been made in view of the above-described problems of the prior art, and an object thereof is to provide a connector with improved sealing performance.

  A connector according to the present invention is a connector that is fitted into a mounting hole of a housing and is bolted to a fixing portion in the vicinity of the mounting hole, and holds a distal end portion of a cable and is fitted into the mounting hole. A connector main body, and an annular seal member that is attached to the outer periphery of the connector main body and is interposed between the mounting hole and the fitting surface of the connector main body, and the connector main body extends in the outer peripheral direction from the connector main body. A bolt fastening portion that is bolted to a fixing portion in the vicinity of the mounting hole, and a seal holding portion that is positioned closer to the distal end side than the bolt fastening portion and to which the seal member is mounted. The bolt fastening portion that is bolted to the fixing portion having a first contact surface extending in a direction along the direction has a second contact surface that is inclined with respect to the axial direction of the connector body, The bolt fastening portion is When it is bolted to the serial fixing portion with respect to the center axis of said mounting hole, the center axis of the connector body is tilted.

  The connector connection structure according to the present invention is a connector connection structure that is fitted into a mounting hole of a housing and is bolted to a fixing portion in the vicinity of the mounting hole. A connector main body fitted into the mounting hole, and an annular seal member attached to the outer periphery of the connector main body and interposed between the mounting hole and the fitting surface of the connector main body, A bolt fastening portion that extends from the connector main body in the outer peripheral direction and is bolted to the fixing portion; and a seal holding portion that is positioned on the tip side of the bolt fastening portion and to which the seal member is mounted. The bolt fastening having the second contact surface inclined with respect to the axial direction of the connector main body on the fixing portion having the first contact surface extending in the direction along the central axis of the mounting hole. Part is Bol Fixed, central axis of the connector body so as to intersect with the center axis of said mounting hole, the connector body wherein is fitted into the mounting hole is inclined.

  According to the present invention, when the bolt fastening part is bolted to the fixed part, the center axis of the connector body (seal holding part) is inclined with respect to the center axis of the mounting hole. Even if the position of the connector main body in the mounting hole is displaced due to the bolt fixing, the crushing amount (sealability) of the seal member can be generated over the entire circumference, and a suitable sealability can be ensured. Is possible.

In the connector connection structure according to the present invention, it is preferable that the central axis of the connector main body intersects the central axis of the mounting hole in front of the mounting region of the seal member or the mounting region of the seal member.
Thereby, at the time of bolt fixation, it is possible to reduce the bias | inclination to the bolt fastening direction of the mounting area | region of a sealing member, and to ensure suitable sealing performance.

  According to the present invention, it is possible to provide a connector with improved sealing performance.

It is a perspective view which shows the connector which concerns on one Embodiment of this invention. It is a section schematic diagram showing the connection structure of the connector. It is the cross-sectional schematic which shows the connection structure of the conventional connector. It is a section schematic diagram showing the 1st modification of connection structure of a connector. It is a section schematic diagram showing the 2nd modification of the connection structure of a connector.

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

FIG. 1 is a perspective view showing a connector 1 according to an embodiment of the present invention and a housing 3 of a device to which the connector 1 is connected.
The connector 1 holds the distal end portion of the cable 2 and is attached to the connector main body 11 fitted in the attachment hole 31 of the housing 3 and the outer periphery of the connector main body 11, and the fitting between the attachment hole 31 and the connector main body 11 is performed. And an annular seal member 12 interposed in the mating surface.
Note that a terminal portion 21 is caulked at the tip of the cable 2.

A housing 3 of a device to which the connector 1 is connected is provided with an attachment hole 31 into which the connector main body 11 is fitted and the tip of the cable 2 is inserted, and both left and right ends of the attachment hole 31, and an internal thread is provided on the inner wall. And a fixing portion 32 having a screw hole 33.
In the connector 1, the terminal portion 21 at the tip of the cable 2 is housed in the housing 3 through the attachment hole 31 and is connected to other electrical components (not shown) with the bolt 4. Is done.

  The connector main body 11 is a plate-like member that has a seal holding portion 111 to which the seal member 12 is attached, is formed on the rear end side of the connector main body from the seal holding portion 111, and is integrally formed with the connector main body 11. And a bolt fastening portion 112 having a through hole.

  The seal member 12 is made of an elastic material such as rubber, for example. Further, the seal member 12 is provided on the outer periphery of the seal holding portion 111 at a portion facing the inner wall of the mounting hole 31, and is interposed between the inner wall of the mounting hole 31 and the outer peripheral portion of the seal holding portion 111. Seal the mating surface.

  As shown in FIG. 2A, in the connector connection structure of the present embodiment, the direction (vertical direction) of the axial center of the screw hole 33 of the fixing portion 32 is the fitting direction (horizontal direction) of the connector 1. It is formed in the direction of crossing. That is, a contact surface (hereinafter, also referred to as a first contact surface) 32a of the fixing portion 32 with the bolt fastening portion 112 is a central axis (connector insertion direction) of the mounting hole 31 into which the connector is fitted. ) To be parallel to the lower surface.

On the other hand, a contact surface (hereinafter also referred to as a second contact surface) 112a of the connector body 11 with the fixing portion 32 of the bolt fastening portion 112 is a central axis of the connector body 11 (seal holder 111), That is, it has an inclination θ with respect to the connector insertion direction.
In the embodiment shown in FIG. 2A, when the center axis of the connector main body 11 and the center axis of the mounting hole 31 are aligned, the front end side of the connector in the bolt fastening portion 112 is relatively close to the fixing portion 32, The rear end side of the connector is configured to be relatively separated from the fixed portion 32.

Therefore, in this embodiment, when the seal holding part 111 of the connector main body 11 is inserted (press-fitted) into the attachment hole 31, the first contact surface 112a of the bolt fastening part 112 and the first fastening surface 112a of the bolt fastening part 112 are used. The first abutting surface 112a and the second abutting surface 32a of the fixing portion 32 facing each other are not parallel.
At this time, as shown by the width A in FIG. 2A, the crushing amount of the seal member 12 is substantially uniform in all directions.

  In the present embodiment, if the distance between the closest parts of the bolt fastening part 112 and the fixing part 32 is B, and the distance between the closest parts of the connector body 11 and the inner wall of the mounting hole 31 is C, then C is It was set smaller than B.

  As shown in FIG. 2B, when the bolt fastening portion 112 and the fixing portion 32 are screwed together by the bolt 4, the bolt fastening portion 112 is pressed against the fixing portion 32 and becomes parallel. Accordingly, the connector main body 11 integrally formed with the bolt fastening portion 112 is inclined by the angle difference θ provided in the bolt fastening portion 112 and the fixing portion 32 before the bolt fastening. Therefore, the seal member 12 mounted on the seal holding portion 111 of the connector main body 11 has a large amount of crushing of the upper sealing member 12 in the bolt fastening direction on the rear end side of the connector, and the amount of crushing of the lower sealing member 12 is that of the connector. The tip side becomes larger. Thereby, the sealing member 12 can obtain a sufficient crushing amount over the entire circumference.

The angle difference θ can be determined based on the positional relationship between the seal member 12 and the bolt fastening portion 112. That is, for example, when the connector body 11 is rotated with the center position O of the mounting region of the seal member 12 in FIGS. 2A and 2B as the rotation axis (at the center position O, the center axis of the connector body 11 is attached). When the connector main body 11 is inclined so as to intersect the central axis of the hole 31), it is possible to make the crushing amounts of the upper surface and the lower surface of the seal member 12 equal.
As a configuration for this purpose, for example, when the center position O is on the extension line of the first contact surface 32a of the fixing portion 32 (the surface that contacts the bolt fastening portion 112), the second of the bolt fastening portion 112 is used. What is necessary is just to make it the center position O of the sealing member 12 on the extension line | wire of the contact surface 112a (surface which contacts the fixing | fixed part 32).
Even when the rotation shaft is deviated from the center position O, the sealing performance can be ensured if the amount of crushing of the seal member 12 is ensured continuously in the minimum necessary in all directions viewed from the axial direction. . Although the minimum required amount of crushing varies depending on the material and characteristics of the seal member 12, for example, if a predetermined amount of crushing is ensured for the entire circumference, it is considered that sufficient sealing performance can be ensured. Although various aspects can be applied as the predetermined crushing amount, for example, a crushing amount before bolt fastening can be considered. The term “continuous” as used herein means that the inside and the outside of the mounting hole 31 are separated by the seal member 12 without a gap.

  In this embodiment, as shown in FIG. 2 (a), the upper surface side of the connector body 11 (attached by tightening the bolts) so that the inner wall surface of the attachment hole 31 and the connector body 11 do not interfere with each other at the time of bolt fastening. On the side close to the inner wall of the hole 31, the connector main body 11 is provided with a step having a width D so that the rear end side is separated from the inner wall surface of the mounting hole as compared with the front end side of the connector main body.

FIG. 3 is a schematic side sectional view of the connector 1 ′ connection structure according to the comparative example.
As shown in FIG. 3A, the fixing portion 32 ′ provided in the vicinity of the mounting hole of the housing 3 ′ has a first contact surface 32′a extending in the direction along the central axis of the mounting hole 31 ′. In the connector 1 ′ according to the comparative example, the bolt fastening portion 112 ′ is formed in parallel with the axial direction. Further, when the connector main body 11 ′ is inserted into the mounting hole 31 ′ of the housing 3 ′, the first contact surface of the fixing portion 32 ′ is prevented so that the bolt fastening portion 112 ′ does not interfere with the fixing portion 32 ′. The second abutting surface 112 ′ of the bolt fastening portion 112 ′ is designed to be separated from the 32 ′ a.
Therefore, as shown in FIG. 3B, when the bolt fastening portion 112 'is bolted to the fixing portion 32', the position of the connector body 11 'fitted in the mounting hole 31' is displaced (biased in the fastening direction). ), The adhesion force of the seal member 12 ′ mounted on the outer periphery of the connector main body 11 ′ to the inner wall of the mounting hole is reduced in a part of the circumferential direction.
That is, when the bolt fastening portion 112 ′ is fixed to the fixing portion 32 ′, the mounting region of the seal member 12 ′ of the connector main body 11 ′ is equivalent in the same direction as the bolt fastening portion 112 ′ is displaced in the fastening direction. Therefore, the close contact force (crushing amount) of the seal member 12 ″ with respect to the inner wall of the mounting hole is biased in the bolt fastening direction, which may impair the sealing performance. On the other hand, in consideration of the displacement of the connector main body 11 ′ when the bolt is fixed, it is conceivable to attach a seal member 12 ′ having a large crushing amount to the outer periphery of the connector main body 11 ′. A large force is required to insert the connector main body 11 'into the hole.

In contrast, in the connector connection structure according to the present embodiment, the bolt fastening portion 112 is bolted to the fixing portion 32 so that the connector main body 11 fitted in the mounting hole 31 is tilted. The contact force (crush amount) of the seal member 12 with respect to the inner wall varies in the axial direction, and a portion having a high contact force is formed. Therefore, even if the adhesion force (crushing amount) of the seal member 12 to the inner wall of the mounting hole is biased in the bolt fastening direction, a predetermined crushing amount is ensured and sufficient sealing performance can be secured.
As described above, in the embodiment of the present invention shown in FIGS. 1 and 2, even if the connector is fixed to the housing by bolt fastening, it is possible to suitably maintain the sealing performance of the connector.

[Modification]
Hereinafter, with reference to FIG. 4 and FIG. 5, the modification of the connector connection structure of this embodiment is demonstrated.
A characteristic configuration of the connector connection structure of the present embodiment is a first configuration that extends in a direction along the central axis of the mounting hole 31 after the connector main body 11 of the connector 1 is fitted into the mounting hole 31 of the housing 3. In the connector connection structure in which the bolt fastening portion 112 is bolted to the fixing portion 32 having the abutting surface 32a, the fixing portion 32 is provided with a second abutting surface 112a inclined with respect to the central axis of the connector body 11. By fixing the bolt fastening portion 112 having the bolt, the connector main body 11 fitted in the attachment hole 31 is inclined so that the central axis of the connector main body 11 intersects the central axis of the attachment hole 31 and is attached to the connector main body 11. The sealing performance of the sealing member 12 is maintained, and as shown in the first and second modifications, the position of the fixing portion 32 with respect to the mounting hole 31 and the bolt tightening with respect to the connector body 11 are maintained. Position parts 112, such inclination of the bolt fastening portions 112 relative to the connector body 11 (second contact surface 112a) theta can be appropriately changed.

  In the first modification shown in FIG. 4, the position of the fixing portion 32 with respect to the mounting hole 31 of the housing 3 and the position of the bolt fastening portion 112 with respect to the connector main body 11 of the connector 1 are based on the connector connection structure shown in FIG. Also, the center position of the mounting region of the seal member 12 does not exist on the extension of the first contact surface 32a and the second contact surface 112a. However, the distance between the first contact surface 32a and the second contact surface 112a and the angle difference θ provided between the bolt fastening portion 112 and the fixing portion 32 coincide with each other. When the bolt fastening portion 112 that is inclined with respect to the fixing portion 32 is bolted to the fixing portion 32, the center of the connector main body 11 is located at the center position of the mounting region of the seal member 12 as in the connector connection structure shown in FIG. The connector body 11 fitted in the attachment hole 31 is inclined so that the axis CL1 and the central axis CL2 of the attachment hole 31 intersect.

As in the embodiment shown in FIG. 2, the first modified example is also shown in FIG. 4B after the connector body 11 is fitted in the mounting hole 31 of the housing 3 as shown in FIG. In addition, the second abutting surface 112a of the bolt fastening portion 112 is brought into contact with the first abutting surface 32a of the fixing portion 32 to fix the bolt, and the connector body 11 is inclined in the mounting hole.
At this time, the intersection point P between the central axis CL1 of the connector main body 11 inclined in the mounting hole 31 and the central axis CL2 of the mounting hole 31 is at the center of the mounting region of the sealing member 12, preferably the mounting region of the sealing member 12. When located, the displacement amount (bias in the fastening direction) in the mounting region of the seal member 12 is very small. In addition, due to the inclination of the connector main body 11, the contact force (crush amount) of the seal member 12 changes in the axial direction, and a part of the contact force in the axial direction increases.
For this reason, a predetermined crushing amount is ensured for the entire circumference of the seal member 12, and sufficient sealing performance can be ensured.

  In the second modification shown in FIG. 5, the position of the fixing portion 32 with respect to the mounting hole 31 of the housing 3 and the position of the bolt fastening portion 112 with respect to the connector main body 11 of the connector 1 are based on the connector connection structure shown in FIG. Also, the center position of the mounting region of the seal member 12 does not exist on the extension of the first contact surface 32a and the second contact surface 112a, and the bolt fastening portion 112 and the fixing portion 32 are also provided. Is smaller than the connector connection structure shown in FIG. As a result, when the bolt fastening portion 112 of the connector is bolted to the fixing portion 32 of the housing 3, the center axis CL <b> 1 of the connector main body 11 and the mounting hole 31 are located in front of the mounting region of the seal member 12 in the connector main body 11. The connector main body 11 fitted in the mounting hole 31 is inclined so that the central axis CL2 intersects.

Similarly to the embodiment shown in FIG. 2, the second modified example is also shown in FIG. 5B after the connector body 11 is fitted in the mounting hole 31 of the housing 3 as shown in FIG. In addition, the second abutting surface 112a of the bolt fastening portion 112 is brought into contact with the first abutting surface 32a of the fixing portion 32 to fix the bolt, and the connector body 11 is inclined in the mounting hole.
At this time, when the intersection P between the center axis CL1 of the connector main body 11 inclined in the mounting hole 31 and the center axis CL2 of the mounting hole 31 is ahead of the mounting region of the seal member 12, the connector 1 fixed with bolts is used. The bias in the fastening direction is smaller in the displacement in the mounting region of the seal member 12 than in the bolt fastening portion 112. In addition, due to the inclination of the connector main body 11, the contact force (crush amount) of the seal member 12 changes in the axial direction, and a part of the contact force in the axial direction increases.
For this reason, a predetermined crushing amount is ensured for the entire circumference of the seal member 12, and sufficient sealing performance can be ensured.

DESCRIPTION OF SYMBOLS 1 ... Connector, 2 ... Cable, 3 ... Housing | casing, 4 ... Bolt, 11 ... Connector main body,
DESCRIPTION OF SYMBOLS 12 ... Seal member, 21 ... Terminal part, 31 ... Mounting hole, 32 ... Fixing part, 32a ... 1st contact surface 33 ... Screw hole, 111 ... Seal holding part, 112 ... Bolt fastening part, 112a ... 1st Abutment surface.

Claims (4)

A connector that is fitted into the mounting hole of the housing and is bolted to a fixing portion near the mounting hole,
A connector body that holds the tip of the cable and is fitted into the mounting hole;
Mounted on the outer periphery of the connector body, and provided with an annular seal member interposed between the mounting hole and the fitting surface of the connector body,
The connector body is
A bolt fastening portion extending from the connector body toward the outer peripheral direction and bolted to a fixing portion in the vicinity of the mounting hole,
It has a seal holding part which is located on the tip side from the bolt fastening part and to which the seal member is attached,
The bolt fastening portion that is bolted to the fixing portion having a first contact surface extending in a direction along the central axis of the mounting hole is a second contact that is inclined with respect to the axial direction of the connector body. Has a tangent surface,
When the bolt fastening portion is bolted to the fixed portion, the central axis of the connector body is inclined with respect to the central axis of the mounting hole. A connection structure for a connector that is fitted into a mounting hole of a housing and is bolted to a fixing portion in the vicinity of the mounting hole,
The connector is
A connector body that holds the tip of the cable and is fitted into the mounting hole;
Mounted on the outer periphery of the connector body, and provided with an annular seal member interposed between the mounting hole and the fitting surface of the connector body,
The connector body is
A bolt fastening portion extending from the connector body toward the outer peripheral direction and bolted to the fixing portion;
A seal holding portion that is positioned on the tip side of the bolt fastening portion and to which the seal member is attached;
The bolt fastening portion having a second contact surface that is inclined with respect to the axial direction of the connector body on the fixing portion having the first contact surface extending in a direction along the central axis of the mounting hole. Bolted and
The connector connection structure, wherein the connector body fitted into the mounting hole is inclined so that the central axis of the connector body intersects the central axis of the mounting hole. The connector connection structure according to claim 2, wherein a central axis of the connector main body intersects with a central axis of the mounting hole in a mounting region of the seal member in the connector main body. The connector connection structure according to claim 2, wherein a central axis of the connector main body intersects with a central axis of the mounting hole in front of the mounting region of the seal member in the connector main body.