JPH07282891A - Waterproof structure for connector directly fitted to apparatus - Google Patents

Abstract

PURPOSE:To prevent water from infiltrating into an apparatus through a hook hole formed for hooking a waterproof packing in the structure of the waterproof packing for a connector directly fitted to the apparatus. CONSTITUTION:When a direct fitting side male connector housing 5 is coupled with a connection side female connector housing 1, the tip of the male connector housing 5 is brought into contact with a circular packing 7 at the depth of the female connector housing 1, and the infiltration of water into a connector is prevented. A projection 37 on an apparatus side enters a hook hole 13 hooking the circular packing 7 to press the head section of a hook projection 9. The hook projection 9 and head section 11 are compressed by this pressing, and the hook hole 13 is sealed. Water can be prevented from infiltrating into the apparatus inside 28 through the hook hole 13.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a waterproof structure for preventing intrusion of water into a device directly attached to a device for supplying electric power to an electric vehicle.

[0002]

2. Description of the Related Art As an example of a waterproof structure provided in a conventional connector, the structure disclosed in Japanese Patent Laid-Open No. 1-95475 is shown in FIGS. Note that only the connector housing that constitutes the outer shell of the connector is described in these drawings.

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 front end surface of the female connector housing 5 contacts the inner part of the male connector housing 1. An annular packing 7 is provided at this contacting portion. As a result, when the female connector housing 5 is fitted into the male connector housing 1, the annular packing 7
Is compressed and adheres tightly to the male and female connector housings 1 and 5 for waterproofing.

The annular packing 7 is provided by being locked in the inner part of the male connector housing 1 as follows. That is, locking projections 9 (FIG. 8) are provided on the back side of the annular packing 7 at a plurality of circumferential positions. A head 11 is formed at the tip of each of the locking projections 9. Then, when the locking projection 9 is press-fitted into the locking hole 13 (FIG. 7), the head portion 11 penetrates the locking hole 13 and acts as a stopper.

Water or the like from the outside enters 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 further. . That is, no penetration (shown by the dotted line in FIG. 7) can be made between the inner peripheral surface of the female connector housing 5 and the inner cylindrical portion 15 of the male connector housing 1.
In this way, water drops cannot enter the inside of the connector.

[0006]

However, the water that has penetrated to the annular packing 7 will not be able to reach the locking projections 9 described above.
It may pass through between the locking hole 13 and the locking hole 13 (shown by the solid line 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 above-mentioned conventional example (JP-A-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 is a problem.

The present invention has been made to solve the above problems, and even if it is a connector directly attached to equipment,
An object of the present invention is to provide a waterproof structure for a device direct-attaching connector which can prevent water from entering the inside of the device through the locking hole of the annular packing.

[0008]

The present invention has been made to achieve the above object, and a waterproof packing structure for a connector directly attached to a device according to claim 1 has a flange bottom wall attached to the device side. Directly mounted connector housing,
A connecting side connector housing that fits inside the direct mounting side connector housing; and an annular packing that is in contact with the inner periphery of the connecting side connector housing in the front end direction and is locked to the bottom of the direct mounting side connector housing. In the device direct-attached connector, which is provided with a locking projection protruding on the back side of the annular packing for the locking and a step for locking the head of the locking projection, from the flange bottom wall It is characterized in that it is provided with a locking hole penetrating to a mounting surface of the device side, and a projection provided on the mounting surface of the device side and protruding to press the head of the locking projection.

Further, in the waterproof packing structure for a device directly mounted connector according to a second aspect of the present invention, a ring-shaped projection which is in close contact with the inner peripheral surface of the locking hole is further formed in the longitudinal direction of the locking projection. Is characterized by. Further, in the waterproof packing structure for a device directly mounted connector according to claim 3, a ring-shaped groove for locking the ring-shaped projection is formed on an inner peripheral surface in the middle of the locking hole. To do.

[0010]

When the direct mounting side connector housing is attached to the device side, the projection provided on the mounting surface of the device side is inserted into the locking hole penetrating to the mounting surface of the direct mounting side connector housing. Press the head of the locking projection inside.
By this pressing, the locking protrusion and the head are compressed and pressed with a strong force against the inner peripheral surface of the locking hole to seal the locking hole and prevent water from passing therethrough. Further, although the head portion of the locking projection is pressed by the projection, it can be locked at 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 brought into close contact with the inner surface of the locking hole, thereby exhibiting higher waterproofness. Further, according to the invention of claim 3, even if the head portion of the locking projection is pressed by the projection, the ring-shaped projection of the locking projection locks in the ring-shaped groove of the locking hole, so that the locked state is made stronger. Can be maintained.

[0012]

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

That is, in the fitting chamber 19 between the outer tubular portion 3 and the inner tubular portion 15 of the male connector housing 1,
The male connector housing 5 fits. In the inner part of the fitting chamber 19 with which the front end surface of the female connector housing 5 contacts,
An annular packing 7 is provided. On the back side of the annular packing 7, there are two locking projections 9 (FIG. 1) in the circumferential direction.
Is projected. This projecting is performed 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. A step 21 is formed in the locking hole 13 into which the locking projection 9 is press fitted,
The head portion 11 is locked to prevent the head portion from coming off. Further, a ring-shaped flange portion 23 is formed on the outer peripheral side of the annular packing 7. The tip of the female connector housing 5 contacts and presses the ring-shaped flange portion 23.

A rectangular flange bottom wall 25 is formed at the rear end of the male connector housing 1, and the flange bottom wall 25 is formed.
The end surface of the mounting surface 1 for mounting on a device
It is 7. The flange bottom wall 25 connects the inner tubular portion 15 and the outer tubular 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 device-side flange 27 communicates with the inside of the device.

Bolt holes 29 are provided in both flanges 25 and 27 so that the mounting surface 17 and the mounting surface 31 are in close contact with each other and pressed. A ring-shaped groove 33 is formed on the mounting surface 17, and a seal ring 35 is disposed inside to provide waterproofing. Inside the seal ring 35, the locking hole 13 for locking the annular packing 7 penetrates.

Therefore, the head 11 of the locking projection 9 which is press-fitted into the locking hole 13 is also exposed from the mounting surface 17. A protrusion 37 is provided on the mounting surface 31 of the flange 27 on the device side at a position corresponding to the locking hole 13. The protrusion 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 coaxially provided inside the female connector housing 5 and connected to a rear shielded electric wire 41. The metal shell 43, which is connected to the braid of the shielded electric wire 41 with the copper tape 42, spreads so as to wrap around the male terminal 39 and the like, shields electromagnetic waves generated from the male terminal 39 and shields noise.

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

A ring-shaped groove 49 is formed on the outer peripheral surface of the male terminal 39.
And a locking lance 51 elastically provided on the inner peripheral surface of the female connector housing 5 with respect to the groove 49.
Of the male terminal 39 is locked to prevent the male terminal 39 from coming out backward. A ring-shaped flange 53 is formed in front of the ring-shaped groove 49, and the male terminal 39 is formed by the L-shaped section 55 formed on the inner peripheral surface of the female connector housing 5.
The forward movement of is restricted.

A female terminal 57 made of a conductive material is provided coaxially with the male terminal 39 at the center of the male connector housing 1 and is connected to a rear shielded electric wire 58. A terminal hole 59 is formed at the tip of the female terminal 57, and the male terminal 39 is fitted into the terminal hole 59 for electrical connection. Further, a ring-shaped groove 61 is also formed on the outer peripheral surface of the female terminal 57, and the tip of a locking lance 63 provided inside the male connector housing 1 is locked to prevent the female terminal 57 from coming out 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 restrict the forward movement.

A metal shell 66 is provided inside the male connector housing 1 so as to enclose the female terminal 57, and the metal shell 43 provided from the male terminal 39 side can be brought into contact with each other at their tips. Female terminal 57
Shield against electromagnetic waves generated from the

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 with a finger to bend the lock arm 67 is provided. A lock protrusion 71 is formed in the middle of the lock arm 67. An inclined portion 72 is formed in front of the lock protrusion 71 in the fitting direction. Also, this lock protrusion 71
An engaging 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 into the male connector housing 1, the inclined portion 72 of the locking protrusion 71 causes the outer cylindrical portion 3 of the male connector housing 1 to move. Touch the edge of
The lock arm 67 bends so as to go under the tubular portion 3. Therefore, the lock protrusion 71 is engaged under the edge of the tubular portion 3 and then engages with the engagement hole 73. When releasing this engagement, the pressing portion is pushed to bend the lock arm 67 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 device side flange 27, and a bolt is passed through the bolt hole 29 and tightened with a nut. At this time, the head portion 11 of the locking projection 9 that is press-fitted into the locking hole 13 of the male connector housing 1 has the mounting surface 3 that is inserted into the locking hole 11.
It is pressed by the projection 37 of No. 1 (FIG. 4). By this pressing, the locking projection 9 and the head 11 are wholly compressed and pressed against the inner peripheral surface of the locking hole 13 with a strong force. With this pressure,
The locking hole 13 is hermetically sealed to prevent water from passing through the locking hole 13. Therefore, the locking hole 13 is waterproofed.

Further, since the head portion 11 of the locking projection 9 is pressed by the projection 37, the locking projection 9 receives a force in the direction of coming out of the locking hole 13. However, the head 11 has the locking hole 13
Since it is locked to the step 21 of the above, it does not come off with a little force, and the locked state can be maintained.

As described above, in the present embodiment, when no special waterproof structure is provided between the locking hole 13 penetrating to the mounting surface 17 and the inside of the device, the locking hole 13 is passed through the locking hole 13. It is possible to prevent water from entering and also to sufficiently lock the annular packing 7 originally intended for the locking hole 13.

Further, as shown in FIG. 5, by providing an annular ring-shaped protrusion 75 in the middle of the axial portion of the annular packing 7 in the longitudinal direction, the ring-shaped protrusion 75 is brought into close contact with the inner surface of the locking hole 13 and It can be highly waterproof.
Further, in the above-mentioned embodiment, the engagement of the projection 37 with the step 21 is only to prevent the engagement projection 9 from coming out of the engagement hole 13 against the force pressing the head 11. there were. However, as shown in FIG. 5, the ring-shaped groove 77 for the ring-shaped projection 75 may be formed on the inner peripheral surface of the locking hole 13 to prevent the slip-out.

As a result, 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 in the locking hole 13 not only by the head 11 but also by the ring-shaped projection 75. Therefore, the protrusion 11 causes the head 11
Even if is pressed in the pull-out direction, the locking projection 9 does not come off, and the locked state can be more firmly maintained.

Further, in the above embodiment, the male connector housing 1 is provided with the female terminal 57 and the female connector housing 5 is provided with the male terminal 39. However, in other embodiments, these relationships are shown. 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.

Further, although the mounting surface 17 for mounting to the device is a substantially flat surface in the above embodiments, it may be a conical mounting surface in other embodiments. Further, it may be a mounting surface having a step. In short, it suffices that it be attached, and it is not necessarily flat.

[0031]

As described above, according to the inventions of claims 1 to 3, since the projection on the device side presses the head of the locking projection for locking the annular packing, the locking projection and 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 passing through the locking hole and entering the inside of the device. Moreover, since a step is formed in the locking hole for locking the head of the locking projection,
Even if the pressure is applied, the locking projection does not come off, and the locked state can be maintained.

According to the second aspect of the 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 invention of claim 3, in addition to the above effect, even if the projection on the device side presses the head of the locking projection, the ring-shaped projection of the locking projection engages with the ring-shaped groove of the locking hole. Since it is stopped, the locked state can be maintained more firmly.

[Brief description of drawings]

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

FIG. 2 is a vertical cross-sectional view in a state where FIG. 2 is assembled.

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

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

5 shows another embodiment and is a diagram corresponding to FIG. 3. FIG.

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

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

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

[Explanation of symbols]

 1 Male Connector Housing 5 Female Connector Housing 7 Annular Packing 9 Locking Protrusion 11 Head 13 Locking Hole 17 Mounting Surface 21 Step 25 Flange Bottom Wall 31 Mounted Surface 37 Projection 75 Ring-shaped Protrusion 77 Ring-shaped Groove

Claims (3)

[Claims] 1. A tubular direct-attachment-side connector housing having a flange bottom wall attached to the device side, a connection-side connector housing fitted inside the direct-attachment-side connector housing, and a tip of the connection-side connector housing. In a connector directly attached to a device, which is in contact with the inner circumference of the one side and has an annular packing which is provided so as to be locked to the bottom portion of the directly mounted connector housing, a locking projection projecting on the back side of the annular packing for the locking. A locking hole having a step for locking the head of the locking projection and penetrating from the flange bottom wall to the mounting surface of the device side, and protrudingly provided on the mounting surface of the device side, A waterproof structure for a connector directly attached to a device, comprising: a projection for pressing the head of the locking projection. 2. The waterproof structure for a device-directly attached connector according to claim 1, wherein a ring-shaped projection is formed in the middle of the locking projection in the longitudinal direction so as to be in close contact with the inner peripheral surface of the locking hole. 3. The waterproof structure for a device-directly attached connector 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.