JP2993589B2 - Waterproof structure of directly mounted connector - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a waterproof structure in which water is prevented from entering into a device, for example, in a connector directly attached to a device for supplying power to an electric vehicle.

[0002]

2. Description of the Related Art FIGS. 6 to 8 show an example of a waterproof structure provided in a conventional connector described in Japanese Patent Application Laid-Open No. 1-95475. It should be noted that only the connector housing constituting the outer shell of the connector is shown in these figures.

The male connector housing 1 has a substantially double cylindrical shape, and a cylindrical female connector housing 5 is fitted inside the outer cylindrical portion 3. The distal end surface of the female connector housing 5 contacts the back of the male connector housing 1. An annular packing 7 is provided in this contacting part. Thus, when the female connector housing 5 is fitted into the male connector housing 1, the annular packing 7
Are compressed and adhere to the male and female connector housings 1, 5 to provide waterproofing.

[0004] The annular packing 7 is provided so as to be locked at the back of the male connector housing 1 as follows. That is, locking projections 9 (FIG. 8) are provided on the rear side of the annular packing 7 at a plurality of locations in the circumferential direction. A head 11 is formed at the tip of each of the locking projections 9. When the locking projection 9 is press-fitted into the locking hole 13 (FIG. 7), the head 11 penetrates the locking hole 13 and functions as a stopper.

Water or the like from the outside invades between the outer cylindrical portion 3 of the male connector housing 1 and the outer peripheral surface of the female connector housing 5, but is blocked by the annular packing 7 and does not enter any further. . That is, it cannot penetrate between the inner peripheral surface of the female connector housing 5 and the cylindrical portion 15 inside the male connector housing 1 (indicated by a dotted line in FIG. 7).
In this way, water droplets and the like cannot enter the inside of the connector.

[0006]

However, the water that has penetrated to the annular packing 7 does not reach the locking projections 9.
May pass between the lock holes 13 (shown by solid lines in FIG. 7). Generally, even if water passes through this portion, the water does not enter the inside of the connector, so that there is no problem in the conventional example (Japanese Patent Laid-Open No. 1-95475). However, when the male connector housing 1 in this case is directly attached to the device (referred to as direct attachment in this specification), water may enter the inside of the device. That is, when the male connector housing 1 is directly attached to the device, the locking hole 13 may be located inside the device. In this case, the water passing through the locking hole 13 immediately enters the inside of the device, which causes a problem.

[0007] The present invention has been made to solve the above problems, and even if the connector is directly attached to the equipment,
It is an object of the present invention to provide a waterproof structure of a connector directly attached to a device, which can prevent water from entering the inside of the device through a locking hole of an annular packing.

[0008]

SUMMARY OF THE INVENTION The present invention has been made to achieve the above object, and a waterproof packing structure for a connector directly attached to equipment according to claim 1 has a flange bottom wall attached to the equipment. Direct-side connector housing,
A device direct mounting comprising: a connection side connector housing fitted inside the directly mounted side connector housing; and an annular packing provided in contact with an inner periphery at a distal end of the connection side connector housing and locked to the flange bottom wall . At the connector
A locking projection protruding from the annular packing toward the flange bottom wall for the locking, and a step for locking a head of the locking projection, the device is provided from the flange bottom wall. It is characterized by comprising a locking hole penetrating the mounting surface with the side, and a projection protruding from the mounting surface on the device side and pressing the head of the locking projection.

In the waterproof packing structure for a connector directly attached to a device according to a second aspect of the present invention, a ring-shaped projection which is in close contact with an inner peripheral surface of the locking hole is formed in the longitudinal direction of the locking projection. It is characterized by. Further, the waterproof packing structure of the connector directly attached to the device according to the present invention is characterized in that a ring-shaped groove for locking the ring-shaped projection is formed on an inner peripheral surface in the middle of the locking hole. I do.

[0010]

When the directly mounted connector housing is mounted on the device, the projection provided on the mounting surface of the device is inserted into a locking hole penetrating the mounting surface of the directly mounted connector housing. Press the head of the locking projection inside.
Due to this pressing, the locking projection and the head are compressed and pressed against the inner peripheral surface of the locking hole with a strong force to seal the locking hole and prevent water from passing therethrough. Further, although the head of the locking projection is pressed by the projection, it is locked to the step of the locking hole, and the locked state can be maintained.

According to the second aspect of the present invention, the ring-shaped projection of the locking projection is in close contact with the inner surface of the locking hole, and exhibits higher waterproofness. Further, according to the third aspect of the invention, even if the head of the locking projection is pressed by the projection, the ring-shaped projection of the locking projection is locked in the ring-shaped groove of the locking hole, so that the locking state can be further strengthened. Can be maintained.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. The directly attached male connector housing (hereinafter referred to as male connector housing) 1 has a substantially double cylindrical shape, and is attached to the device by an attachment surface 17 (FIG. 2). A cylindrical connection-side female connector housing (hereinafter referred to as a female connector housing 5) is fitted inside the male connector housing 1.

That is, the fitting chamber 19 between the outer cylindrical portion 3 and the inner cylindrical portion 15 of the male connector housing 1
The male connector housing 5 fits. At the back of the fitting chamber 19 where the tip end surface of the female connector housing 5 contacts,
An annular packing 7 is provided. On the back side of the annular packing 7, locking projections 9 are provided at two places in the circumferential direction (FIG. 1).
Is protruding. This projection is made at right angles to the width direction of the annular packing 7.

A substantially conical head 11 is provided at the tip of the locking projection 9.
(FIG. 3) is formed. Further, a step 21 is formed in the locking hole 13 into which the locking projection 9 is press-fitted.
The head 11 is locked to prevent the head from falling off. A ring-shaped flange portion 23 is formed on the outer peripheral side of the annular packing 7. The distal end of the female connector housing 5 contacts and presses this ring-shaped flange portion 23.

At the rear end of the male connector housing 1, a rectangular flange bottom wall 25 is formed.
Of the mounting surface 1 for mounting to equipment
It is 7. The flange bottom wall 25 connects the inner cylindrical portion 15 and the outer cylindrical portion 3, and a rectangular flange 27 is also provided on the device side so as to be in close contact with the flange bottom wall 25. A hole 28 formed in the center of the flange 27 on the device side communicates with the inside of the device.

A bolt hole 29 is provided in each of the flanges 25 and 27 so that the mounting surface 17 and the mounting surface 31 are pressed against each other. A ring-shaped groove 33 is formed on the mounting surface 17, and a seal ring 35 is arranged inside the groove, and waterproofing is performed. The locking hole 13 for locking the annular packing 7 penetrates through the inside of the seal ring 35.

Accordingly, the head 11 of the locking projection 9 press-fitted into the locking hole 13 is also exposed from the mounting surface 17. At a position corresponding to the locking hole 13, a projection 37 is provided on the mounting surface 31 of the flange 27 on the device side. The projection 37 has a size that can be inserted into the locking hole 13. As shown by a chain line in FIG. 2, a male terminal 39 made of a conductive material is provided coaxially inside the female connector housing 5 and connected to a rear shielded electric wire 41. The metal shell 43 connected to the braid of the shielded electric wire 41 with the copper tape 42 spreads so as to enclose the male terminal 39 and the like, shields electromagnetic waves generated from the male terminal 39 and the like, and shields noise.

The shield wire 41 on the male terminal 39 side is
The rear holder 45 is supported on the inner peripheral surface of the female connector housing 5. A waterproof rubber stopper 47 is provided on the right side of the supporting portion in the figure to prevent water from entering the rear holder 45.

A ring-shaped groove 49 is formed on the outer peripheral surface of the male terminal 39.
A locking lance 51 elastically provided on the inner peripheral surface of the female connector housing 5 is formed in the groove 49.
Of the male terminal 39 is prevented from coming off. A ring-shaped flange 53 is formed in front of the ring-shaped groove 49, and the male terminal 39 is formed by an L-shaped section 55 formed on the inner peripheral surface of the female connector housing 5.
Is restricted from moving forward.

At the center of the male connector housing 1, a female terminal 57 made of a conductive material is provided coaxially with the male terminal 39, and is connected to a rear shielded wire 58. A terminal hole 59 is formed at the distal end of the female terminal 57, and the male terminal 39 is fitted to make electrical connection. Further, a ring-shaped groove 61 is also formed on the outer peripheral surface of the female terminal 57, and the leading end of a locking lance 63 provided inside the male connector housing 1 is locked to prevent the female terminal 57 from falling backward. It is carried out. Further, an L-shaped section 65 provided on the inner peripheral surface of the male connector housing 1 abuts on the tip of the female terminal 57 to regulate the forward movement.

A metal shell 66 is provided inside the male connector housing 1 so as to wrap the female terminal 57, and the metal shell 43 provided from the male terminal 39 side can be in contact with the metal shell 43 at the tips thereof. Female terminal 57
It shields against electromagnetic waves generated from the above.

On the outer peripheral portion of the female connector housing 5,
A cantilevered lock arm 67 (FIG. 1) is elastically provided. The lock arm 67 is provided at one position in the circumferential direction. At the tip of the lock arm 67, a pressing portion 69 for pressing the finger with a finger to bend the lock arm 67 is provided. A lock projection 71 is formed in the middle of the lock arm 67. An inclined portion 72 is provided forward of the lock projection 71 in the fitting direction. Also, this lock projection 71
The engagement hole 73 is formed in the outer cylindrical portion 3 of the male connector housing 1 at a position corresponding to.

When a force is applied in the axial direction so as to fit the female connector housing 5 to the male connector housing 1, the inclined portion 72 of the lock projection 71 causes the outer cylindrical portion 3 of the male connector housing 1 to be fitted. Touching the edge of
The lock arm 67 bends so as to go under the cylindrical portion 3. Therefore, the lock projection 71 engages with the engagement hole 73 after sinking below the edge of the cylindrical portion 3. To release the engagement, the pressing portion is pressed, and the lock arm 67 is bent again. As a result, the lock projection 71 is disengaged from the engagement hole 73, so that the fitting can be easily disengaged.

The operation of this embodiment will be described below. First, the mounting surface 17 of the flange 25 of the male connector housing 1 is aligned with the mounting surface 31 of the flange 27 on the device side, and a bolt is passed through the bolt hole 29 and tightened by a nut. At this time, the head 11 of the locking projection 9 pressed into the locking hole 13 of the male connector housing 1 is attached to the mounting surface 3 inserted into the locking hole 11.
It is pressed by one projection 37 (FIG. 4). By this pressing, the locking projection 9 and the head 11 are entirely compressed, and are pressed against the inner peripheral surface of the locking hole 13 with a strong force. With this press,
The locking hole 13 is sealed, so that water can be prevented from passing through the locking hole 13. Therefore, waterproofing in the locking hole 13 is performed.

When the head 11 of the locking projection 9 is pressed by the projection 37, the locking projection 9 receives a force in a direction to come out of the locking hole 13. However, the head 11 has a locking hole 13
And can be maintained in a locked state without being pulled out by a small force.

As described above, in this embodiment, when a separate waterproof structure is not provided between the locking hole 13 penetrating the mounting surface 17 and the inside of the device, the locking hole 13 passes through the locking hole 13. Water can be prevented from entering, and the original annular packing 7 can be sufficiently locked by the locking hole 13.

Further, as shown in FIG. 5, by providing an annular ring-shaped projection 75 in the middle of the longitudinal shaft portion of the annular packing 7, the ring-shaped projection 75 comes into close contact with the inner surface of the locking hole 13. High waterproofness can be provided.
Further, in the above-described embodiment, what prevents the locking projection 9 from falling out of the locking hole 13 against the force of the projection 37 pressing the head 11 is only the engagement of the head 11 with the step 21. there were. However, as shown in FIG. 5, a ring-shaped groove 77 for the ring-shaped protrusion 75 may be formed on the inner peripheral surface in the middle of the locking hole 13 to prevent the ring-shaped protrusion 75 from coming off.

Thus, when the locking projection 9 is pressed into the locking hole 13, the ring-shaped projection 75 is locked in the ring-shaped groove 77. Therefore, the locking projection 9 is locked to the locking hole 13 not only by the head 11 but also by the ring-shaped projection 75. Therefore, the head 11
Even if is pressed in the removal direction, the locking projection 9 does not come off, and the locked state can be maintained more firmly.

Further, in the above embodiment, the female terminal 57 is provided in the male connector housing 1 and the male terminal 39 is provided in the female connector housing 5. However, in other embodiments, these relationships are described. It is possible to reverse. That is, the male terminal 39 can be provided in the male connector housing 1 and the female terminal 57 can be provided in the female connector housing 5.

In the above embodiment, the mounting surface 17 for mounting to a device is a substantially flat surface. However, in other embodiments, a conical mounting surface may be used. Further, the mounting surface may have a step. In short, it suffices that attachment is performed, and it is not necessarily limited to a flat surface.

[0031]

As described above, according to the first to third aspects of the present invention, the projection on the device side presses the head of the locking projection for locking the annular packing. Since the head is pressed against the inner peripheral surface of the locking hole with a strong force to seal the locking hole, it is possible to prevent water from penetrating into the device through the locking hole. Moreover, since the locking hole is formed with a step for locking the head of the locking projection,
The locking projection does not come off even by the pressing, and the locked state can be maintained.

Further, according to the second aspect of the present invention, since the ring-shaped projection of the locking projection is in close contact with the inner surface of the locking hole, higher waterproofness is exhibited. According to the third aspect of the invention, in addition to the above-mentioned effects, even if the projection on the device side presses the head of the locking projection, the ring-shaped projection of the locking projection is engaged with the ring-shaped groove of the locking hole. Since the locking is performed, the locked state can be maintained more firmly.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing an embodiment of the present invention.

FIG. 2 is a longitudinal sectional view in a state where FIG. 2 is assembled.

FIG. 3 is an enlarged view of a main part of FIG. 2;

FIG. 4 is a diagram showing the operation of FIG. 3;

FIG. 5 is a view showing another embodiment and corresponding to FIG. 3;

FIG. 6 is a longitudinal sectional view showing a conventional example.

FIG. 7 is an enlarged view of a main part of FIG. 6;

FIG. 8 is a perspective view of the annular packing of FIG. 6;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Male connector housing 5 Female connector housing 7 Ring packing 9 Locking projection 11 Head 13 Locking hole 17 Mounting surface 21 Step 25 Flange bottom wall 31 Mounting surface 37 Projection 75 Ring-shaped projection 77 Ring-shaped groove

Continuation of front page (58) Field surveyed (Int.Cl. ⁶ , DB name) H01R 13/52 301

Claims (3)

(57) [Claims] 1. A tubular connector housing having a flange bottom wall attached to a device side, a connection connector housing fitted inside the connector housing, and a tip of the connection connector housing. rectangular inner periphery in contact, in the connector with equipment directly with an annular packing provided engaged to said flange bottom wall, engagement projecting from the said annular packing toward said flange bottom wall for said locking and retaining projections, the locking hole penetrating from said flange bottom wall to the mounting surface of the device side has a step for locking the head of the locking projection, projecting from the attachment surface of the device side And a projection for pressing the head of the locking projection. 2. The waterproof structure for a connector directly attached to a device according to claim 1, wherein a ring-shaped protrusion is formed in the longitudinal direction of said locking protrusion in close contact with an inner peripheral surface of said locking hole. 3. The waterproof structure for a connector directly mounted on a device according to claim 2, wherein a ring-shaped groove for locking the ring-shaped projection is formed on an inner peripheral surface in the middle of the locking hole.