JP2005195138A - Waterproof structure of casing - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a waterproof structure of a casing in which the absence of a packing by mistake can be easily confirmed in the assembled state of divided cases. <P>SOLUTION: The waterproof structure of the casing 1 comprises a first divided case 3 which has a groove portion 3b on its connecting face 3a, a packing 7 arranged in the groove portion 3b of the first divided case 3, and a second divided case 5 which has a connecting face 5a to be connected with the connecting face 3a of the first divided case 3 via the packing 7. The packing 7 has an exposed portion 7b, which is formed so as to protrude from the side surface of a packing body 7a arranged in the groove portion 3b of the first divided case 3, and is exposed to the outside from the portion between the first and second divided cases 3, 5. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a waterproof structure for a housing in which a packing is interposed between joint surfaces of divided cases.

  As shown in FIG. 6, this type of conventional housing 100 has a waterproof structure in a first divided case 103 in which a groove 103 b is provided on the joint surface 103 a and in a groove 103 b of the first divided case 103. The arranged packing 107 and the joint surface 105a of the second split case 105 joined to the joint surface 103a of the first split case 103 via the seal 107 are provided. In the assembled state, the packing 107 is pushed into the groove 103b of the first split case case 103 and cannot be seen from the outside (Patent Document 1).

JP 2003-98591 A

  In the conventional waterproof structure of the casing 100, the packing 107 cannot be seen from the outside in the assembled state of the divided cases 103 and 105. Therefore, it is necessary to perform a special inspection when confirming that the packing 107 is forgotten. There was a drawback that work was troublesome.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a waterproof structure for a housing that allows easy confirmation of forgotten packing when the divided case is assembled.

  In order to solve the above-mentioned problem, the invention according to claim 1 includes a first divided case in which a groove portion is provided on a joint surface thereof, and a packing disposed in the groove portion of the first divided case. And a waterproof structure of the housing, the joint surface of which is joined to the joint surface of the first split case via the packing, wherein the packing is the first split case. And an exposed portion that is exposed to the outside from between the joint surfaces of the first and second divided cases.

  According to a second aspect of the present invention, the exposed portion of the packing is formed over the entire circumference of the side surface of the packing body, and is exposed from the entire circumference between the joining surfaces of the first and second divided cases. It is what is done.

  According to a third aspect of the present invention, the exposed portion of the packing is formed only on a part of the side surface of the packing main body, and the entire circumference between the joint surfaces of the first and second divided cases is It is exposed only from a part.

  According to a fourth aspect of the present invention, the exposed portion of the packing is formed so as to protrude from a central portion in the joining direction of the split case on the outer surface of the packing body.

  According to a fifth aspect of the present invention, at least a portion of the outer peripheral side region of the groove portion on the joint surface of the first divided case where the exposed portion of the packing is disposed is on the joint surface. In this case, the thickness of the exposed portion is lower than the inner peripheral side region of the groove portion.

  According to the invention of claim 1, since the packing has an exposed portion exposed to the outside from between the joint surfaces of the first and second divided cases, by checking the presence or absence of the exposed portion from the outside, Easily check whether packing has been forgotten in the assembled state of the split case.

  According to the second aspect of the present invention, the exposed portion of the packing is formed over the entire circumference of the side surface of the packing body and is exposed from the entire circumference between the joint surfaces of the first and second divided cases. The presence / absence of the exposed portion can be confirmed from any direction on the outer peripheral side surface of the housing, and the confirmation operation can be performed more easily.

  According to invention of Claim 3, the exposed part of packing is formed only in a part of side surface of a packing main body, and is only a part of the perimeter between the joint surfaces of a 1st and 2nd division | segmentation case. Because it is exposed from (that is, because the protruding area of the exposed portion becomes small), it is possible to suppress an increase in the contact area between the packing and the first and second divided cases, thereby suppressing a decrease in pressure applied to the packing. A sufficient sealing property between the joint surfaces of the split cases can be secured.

  According to the fourth aspect of the present invention, the exposed portion of the packing protrudes from the central portion in the joining direction of the divided case on the outer surface of the packing body (that is, the second divided portion in the packing body). Since the opposing part (upper layer part) with the case and the opposing part (lower layer part) with the first divided case are formed so as to protrude from the exposed part of the packing, 1) the protruding upper layer part and lower layer part It is possible to receive the pressing force from the divided case locally (concentrated) by the part, and thereby the sealing body can sufficiently secure the sealing performance between the joint surfaces of the divided case, and 2) the protruding lower layer part It can fit in the groove part of a 1st division | segmentation case, and can thereby arrange | position packing appropriately in the groove part of a 1st division | segmentation case.

  According to the fifth aspect of the present invention, at least a portion where the exposed portion of the packing is arranged in the outer peripheral side region of the groove portion on the joint surface of the first divided case is on the joint surface. Since the thickness of the exposed portion is formed to be lower than the inner peripheral region of the groove portion, it is possible to prevent the pressing force from the split case from being applied to the exposed portion of the packing (that is, to be dispersed). The fall of the applied pressure can be suppressed and the sealing performance between the joint surfaces of the divided cases can be more sufficiently secured.

<Embodiment>
The housing 1 according to this embodiment is configured as a case for housing an in-vehicle imaging device that images, for example, the periphery of the host vehicle (for example, both left and right sides), and is a set of divided configurations as shown in FIGS. 1 and 2. The first and second divided cases 3, 5, the packing 7 interposed between the joint surfaces of the divided cases 3, 5, and the fastening screw 9 for fastening the divided cases 3, 5 to each other.

  As shown in FIGS. 1 and 3, the first divided case 3 is formed in a rectangular parallelepiped front-opened box shape, for example, and the peripheral surface 3a of the open front forms the joining surface. On the joint surface 3a of the divided case 3, a groove portion 3b for positioning the packing 7 along the joint surface 3a is provided in a recessed manner. In addition, a positioning projection 3 c having an inner side surface that is fitted to the outer side surface of the corner portion of the second divided case 5 is projected from the corner portion (corner portion) of the joint surface 3 a of the divided case 3. Further, an insertion hole 3d for the screw 9 penetrating from the front surface side to the rear surface side is formed inside the corner portion of the joint surface 3a of the divided case 3.

  The packing 7 is formed in an annular shape by an elastic member such as rubber as shown in FIGS. 1 and 3, and more specifically, for example, a packing main body 7a having a quadrangular annular shape and a circular cross section, The exposed portion 7b is formed to protrude from the outer surface of the packing body 7a to an appropriate length outward. The exposed portion 7b is formed so as not to be related to the waterproof structure of the housing 1, as will be described later.

  For example, the exposed portion 7b protrudes from the central portion in the joining direction (squeezing direction) of the divided cases 3 and 5 on the outer surface of the packing body 7a (that is, the upper layer portion (that is, the second layer of the packing body 7a). 7u and a lower layer portion (that is, a portion facing the first divided case 3) 7d are formed so as to protrude from the exposed portion 7b. The exposed portion 7b is formed in an annular shape over the entire circumference of the outer surface of the packing body 7a. Further, insertion portions 7c through which the fastening screws 9 are inserted are provided at the four corners of the packing body 7a.

  As shown in FIG. 3, the packing 7 is divided into the first divided body 7 a (more specifically, the lower layer portion 7 d of the packing main body 7 a) in the groove 3 b of the first divided case 3. Arranged on the case 3. And in the arrangement | positioning state, with reference to FIG. 1, the exposed part 7b of the packing 7 is arrange | positioned on the outer peripheral side area | region 3a-1 of the groove part 3b in the joint surface 3a of the 1st division | segmentation case 3, Further, the insertion portion 7 c of the packing 7 is arranged in communication with the insertion hole 3 d of the first split case 3.

  As shown in FIG. 1, the second divided case 5 is formed, for example, in the shape of a polyhedron whose rear half is a trapezoidal columnar shape in the front half and the cubic shape in the rear half, and the peripheral surface 5a of the rear rear face is the joint surface. Is made. A screw hole 5b into which the fastening screw 9 is screwed is formed in a corner portion of the joint surface 5a of the divided case 5.

  Note that the second divided case 5 is formed of, for example, a transparent member, and its translucent window 5L, 5R for taking in scenery around the vehicle is provided, for example, on the left and right side surfaces of the front half. A light-shielding member (not shown) is coated and finished on portions other than the light-transmitting window portions 5L and 5R, leaving the portions 5L and 5R.

  As shown in FIGS. 1 and 2, the second divided case 5 is formed so that the joint surface 5 a abuts the joint surface 3 a of the first split case 3 via the packing 7. It is assembled to the first divided case 3 in a state of being fitted and arranged inside the positioning protrusion 3 c of the case 3. In this assembled state, the second divided case 5 is positioned and fixed in the joining surface direction, and the screw hole 5b on the joining surface 5a communicates with the insertion hole 3d on the joining surface 3a of the first divided case 3. Be placed.

  In this state, the fastening screw 9 is screwed into the screw hole 5b of the second divided case 5 from the rear surface side of the first divided case 3 through the insertion hole 3d of the first divided case 3 and the insertion portion 7c of the packing 7. By being inserted, the first and second divided cases 3 and 5 are fastened together.

  In this fastened state, as shown in FIGS. 2 and 4, the packing body 7a is locally crushed by the pressing force from the divided cases 3 and 5 by the upper layer portion 7u and the lower layer portion 7d, and thereby the divided case. 3 and 5 are strongly sealed by the packing body 7a, and the tip portion 7e of the exposed portion 7b of the packing 7 is connected between the joint surfaces 3a and 5a of the divided cases 3 and 5 from the joint surface. It is exposed to the outside over the entire circumference between 3a and 5a, so that the fact that the packing 7 is interposed between the first and second divided cases 3 and 5 is displayed to the outside.

  According to the waterproof structure of the housing 1 configured as described above, the packing 7 has the exposed portion 7b exposed to the outside from between the first and second divided cases 3 and 5, and thus the exposed portion 7b By confirming the presence / absence from the outside, it is possible to easily confirm that the packing 7 is forgotten in the assembled state of the divided cases 3 and 5 (the final product state or the intermediate stage of the manufacturing process).

  Further, the exposed portion 7b of the packing 7 is formed over the entire circumference of the side surface of the packing body 7a and is exposed from the entire circumference between the joining surfaces 3a and 5a of the first and second divided cases 3 and 5. The presence / absence of the exposed portion 7b can be confirmed from any direction on the outer peripheral side surface of the housing 1, and the confirmation work can be performed more easily.

  The exposed portion 7b of the packing 7 protrudes from the central portion in the joining direction (crushing direction) of the divided cases 3 and 5 on the outer surface of the packing body 7a (that is, the upper layer portion 7u of the packing body 7a). And the lower layer portion 7d are formed so as to protrude from the exposed portion 7b). 1) The pressing force from the divided cases 3 and 5 is locally (concentrated) by the protruding upper layer portion 7u and lower layer portion 7d. As a result, the sealing body 7a can sufficiently secure the sealing performance between the joint surfaces 3a and 5a of the split cases 3 and 5, and 2) the protruding lower layer portion 7d allows the first split case 3 to be sealed. It can fit in the groove part 3b, and thereby the packing 7 can be appropriately disposed in the groove part 3b of the first divided case 3.

<Modification 1>
In the above embodiment, the case where the exposed portion 7b of the packing 7 is formed over the entire circumference of the side surface of the packing body 7a and is exposed from the entire circumference between the joint surfaces 3a and 5a of the divided cases 3 and 5 will be described. However, the exposed portion 7b of the packing 7 is formed only on a part of the entire circumference of the side surface of the packing body 7a, and only from a part of the entire circumference between the joint surfaces 3a and 5a of the divided cases 3 and 5. It may be exposed.

  In this way, since the surface area (protrusion area) of the exposed portion 7b of the packing 7 is reduced, an increase in the contact area between the packing 7 and the first and second divided cases 3 and 5 can be suppressed. 7 can be suppressed, and the sealing performance between the joint surfaces 3a and 5a of the divided cases 3 and 5 can be more sufficiently ensured.

<Modification 2>
In the above-described embodiment or modification 1, as shown in FIG. 5, at least the packing 7 is exposed in the outer peripheral side region 3 a-1 of the groove 3 b on the joint surface 3 a of the first divided case 3. The portion where the portion 7b is arranged (that is, in the case of the above embodiment (that is, the exposed portion 7b of the packing 7 is arranged over the entire area on the outer peripheral side region 3a-1 of the joining surface 3a of the first divided case 3). In the case of the above-described modified example 1 (that is, the exposed portion 7b of the packing 7 is on the outer peripheral region 3a-1 of the joint surface 3a of the first divided case 3). In the case of being arranged only in a partial region, the entire outer peripheral side region 3 a-1 or the partial region 3 a-3 is used as the inner peripheral region 3 a of the groove 3 b in the joint surface 3 a of the first divided case 3. -2 is lower than the thickness d of the exposed portion 7b of the packing 7 by about a thickness d. It may be as to place the exposed portion 7b of the packing 7 in the upper portion 3a-3 formed uneven low.

  In this way, it is possible to prevent the pressing force from the divided cases 3 and 5 from being applied to the exposed portion 7b of the packing 7 (that is, to be dispersed), thereby suppressing the decrease in the pressure applied to the packing 7 and the first. And the sealing performance between the joint surfaces 3a and 5a of the 2nd division | segmentation cases 3 and 5 can be ensured still more fully.

It is a disassembled perspective view of the housing | casing which concerns on embodiment of this invention. It is an assembly perspective view of a case concerning an embodiment of the invention. It is an enlarged view of the junction part of the III-III sectional view of FIG. It is an enlarged view of the partial junction part of the IV-IV sectional drawing of FIG. It is sectional drawing of the junction part of the assembly | attachment state of the housing | casing which concerns on the modification 2. FIG. It is sectional drawing of the assembly | attachment state of the conventional housing | casing.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Case 3 1st division | segmentation case 3a Peripheral surface (joint surface)
3a-1 Outer peripheral side region 3a-2 Inner peripheral side region 3a-3 Part where the exposed portion of the packing is arranged 3b Groove 5 Second divided case 5a Peripheral surface (joint surface)
7 Packing 7a Packing body 7b Exposed part 7u Upper layer part 7d Lower layer part 7e Tip part

Claims (5)

A first split case in which a groove is provided on the joint surface; a packing disposed in the groove of the first split case; and a joint surface of the first split case via the packing. A waterproof structure of a housing comprising a second divided case joined to the joining surface,
The packing has an exposed portion that protrudes from a side surface of a packing body disposed in the groove portion of the first split case and is exposed to the outside from between the joint surfaces of the first and second split cases. The waterproof structure of the chassis characterized by.   The said exposed part of the said packing is formed over the perimeter of the side surface of the said packing main body, and is exposed from the perimeter between the joint surfaces of the said 1st and 2nd division | segmentation case. The waterproof structure of the housing | casing of 1.   The exposed portion of the packing is formed only on a part of the side surface of the packing body, and is exposed from only a part of the entire circumference between the joint surfaces of the first and second divided cases. The waterproof structure of the housing according to claim 1, wherein the housing is waterproof.   The said exposed part of the said packing is formed so that it may protrude from the center part of the joining direction of the division | segmentation case in the outer surface of the said packing main body. Waterproof structure of the housing. Of the outer peripheral side region of the groove portion on the joint surface of the first split case, at least a portion where the exposed portion of the packing is disposed is on the inner peripheral side of the groove portion on the joint surface. The waterproof structure for a housing according to any one of claims 1 to 4, wherein the exposed portion is formed to be lower in thickness than the region.

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