JP6349780B2 - Waterproof case - Google Patents

Description

  The present invention relates to a waterproof case, and more particularly to a structure used for an in-vehicle camera to join a waterproof case divided into two.

  The in-vehicle camera is installed, for example, at the rear of the vehicle, and confirms safety on the rear side of the vehicle. As shown in the exploded perspective view of the waterproof case in FIG. 6, the in-vehicle camera includes a substantially rectangular parallelepiped waterproof case 100 and a camera body (not shown) that is housed and held in the waterproof case 100.

  The camera body includes an imaging unit. The imaging unit includes an imaging element (not shown) and a lens 110a that forms an image on the imaging element. As shown in FIG. 6, the lens surface of the lens 110 a is disposed on the front surface of the waterproof case 100.

  Regarding the waterproof structure of the waterproof case 100 of the in-vehicle camera as described above, there is one shown in the conventional example of Patent Document 1. In this waterproof structure, the four corners of the waterproof case divided into two by four screws are screwed, thereby providing waterproofing. Note that screwing is one of connection means.

  However, since the method disclosed in Patent Document 1 uses four screws, there is a problem in that the work of tightening the screws takes time and the manufacturing cost increases. Therefore, as shown in an exploded perspective view of the waterproof case 100 in FIG. 6, a method of screwing using only two screws 130 is conceivable. The waterproof structure will be described below.

  As shown in FIG. 6, the waterproof case 100 includes a front case 110, a rear case 120, a rubber packing 140, and two screws 130. The front case 110 and the rear case 120 are joined together, and a camera body (not shown) is accommodated and held in the interior space of the joined waterproof case 100.

  The front case 110 is provided with a lens surface of a lens 110a on the front surface. As shown in FIG. 6B, the front case 110 is a diagonal contact surface of the front case 110 with the rear case 120 and is diagonal. In the two corners, there are provided hole-shaped screwing portions 111 (screw holes) having a bottom to which the screw 130 is screwed and fixed.

As shown in FIG. 6A, the rear case 120 has two corners facing each screwing portion 111 of the front case 110 at the corners of the rear case 120 from the rear side surface. A through-hole 121 that penetrates to the surface of the substantially square-shaped contact surface that is in contact is provided. Note that the screwing portion 111, the through hole 121, and the screw 130 form one of the connection means.

  The rubber packing 140 has a substantially square shape and is sandwiched between the contact surfaces of the front case 110 and the rear case 120 to achieve waterproofing.

  In assembling the waterproof case 100, the screw 130 is inserted into the through-hole 121 from the rear side of the rear case 120 with the front case 110 and the rear case 120 in contact with the packing 140 interposed therebetween. The stopper 111 is screwed and fixed. As a result, the front case 110 and the rear case 120 are coupled.

JP2003-169234A (FIGS. 1 and 6)

  However, in the above-described waterproof case coupling method, when the screw 130 is screwed into the screwing portion 111, diagonal lines (AA) passing through two unscrewed corners of the waterproof case 100 of FIG. As shown in the cross-sectional view above, the two corners not screwed to the corners of the rear case 120 are less likely to be subjected to the restraining force by screwing, so that the two corners of the rear case 120 are not screwed. As a result, the gap between the front case 110 and the rear case 120 is formed, and the waterproof performance may be deteriorated.

  Accordingly, the object of the present invention is to provide a waterproof case in which the waterproof performance does not deteriorate even if the number of screws used is reduced from four.

In order to solve the above-described problems and achieve the object, the waterproof case of the present invention is configured by combining a front case and a rear case, and includes a storage space therein. The front case and the rear case And the contact surfaces of the front case and the rear case are provided with two connection means, and each of the two connection means is equivalent. in the imaginary straight line passing through the plane located on the center of the plane surrounded by the contact surface and located on the same contact surface located across the same center, one of the front case and the rear case The contact surface of one case is provided with a wall portion that is inside the connection means and protrudes from the contact surface along the edge of the contact surface. On the contact surface The wall portion is inserted at a position opposite to the wall portion, and a groove-shaped groove portion is provided to prevent the wall portion from spreading . Moreover, packing is provided in the bottom part of the groove-shaped groove part which suppresses that the wall part spreads .

  According to the waterproof case of the present invention, details will be described later, but one case is provided with a wall portion along the entire periphery of the edge portion of the abutting surface, and the other case is a position facing the wall portion. Since the rear case can be prevented from warping toward the back side by inserting the wall part into the groove part, there is no gap between the rear case and the front case, and waterproof performance is improved. The risk of lowering can be eliminated. Further, the cost can be reduced by reducing the number of screws used from four, and the number of screwing work steps can be reduced.

It is the perspective view which showed the waterproof case concerning this invention. It is the disassembled perspective view which showed the waterproof case concerning this invention. It is sectional drawing on the diagonal of the waterproof case concerning this invention. It is a disassembled perspective view of another Example which showed the waterproof case concerning this invention. It is a rear view of each case of the waterproof case concerning the present invention. It is the disassembled perspective view which showed the waterproof case concerning conventional invention. It is sectional drawing on the diagonal of the waterproof case concerning a prior art invention.

  The waterproof case according to the present invention will be described in detail below using a waterproof case for an in-vehicle camera as an example.

  The structure of the waterproof structure of the waterproof case according to the present embodiment is substantially different from the structure of the waterproof structure of the waterproof case according to the conventional example described above only in the structure on the contact surface. Therefore, the common structure attaches | subjects the same code | symbol and abbreviate | omits description.

  The waterproof structure according to the present embodiment will be described below using the exploded perspective view of the waterproof case in FIG. As shown in FIG. 2A, the rear case 120 is provided with through-holes 121 at two corners located on the opposite sides of the substantially square-shaped contact surface 160b that contacts the front case 110. A wall 122 having a shape protruding from the contact surface 160b along the entire periphery of the edge of the contact surface 160b inside the through hole 121 is provided. On the other hand, as shown in FIG. 2 (B), the front case 110 is screwed in a hole shape with a bottom to which a screw 130 is screwed and fixed at each of the corners facing the through hole 121 of the rear case 120. A portion 111 (screw hole) is provided, and a groove-shaped groove portion 112 having a bottom into which the wall portion 122 is inserted is provided at a position facing the wall portion 122 of the rear case 120. This screwing part 111 and the through-hole 121 become a part of connection means. The wall portion 122 is formed so as to fit into the groove portion 112, and the height of the wall portion 122 is a length capable of crushing the packing 140 provided at the bottom portion of the groove portion 112.

  The wall portion 122 of the rear case 120 is formed integrally with the rear case 120 as shown in a sectional view on a diagonal line (BB) passing through two corners of the waterproof case in FIG. When the waterproof case 100 is assembled, the wall portion 122 is inserted into the groove portion 112 of the front case 110. A packing 140 is provided between the tip of the wall 122 and the bottom of the groove 112. By providing the packing 140 at the bottom of the groove portion 112, water entering from between the front case 110 and the rear case 120 does not directly hit the packing 140, so that the waterproof performance can be improved and the packing 140 can be formed in the groove portion. The packing 140 can be securely attached to be inserted into 112.

  Next, the assembly of the front case 110 and the rear case 120 in the present embodiment will be described below. As shown in FIGS. 1 and 2, the front case 110 and the rear case 120 are brought into contact with each other so that the wall portion 122 of the rear case 120 is inserted into the groove 112 facing the front case 110. In this abutted state, a screw 130 is inserted into the through hole 121 of the rear case 120 from the rear side of the rear case 120 and further screwed into the screw fixing portion 111 of the front case 110. Thereby, the front case 110 and the rear case 120 are combined. Moreover, since the wall part 122 is suppressed from spreading outward by the groove part 112, the rear case 120 does not warp toward the back side. Therefore, there is no gap between the rear case 120 and the front case 110, and the possibility that the waterproof performance is lowered can be eliminated. Note that the depth of the screwing portion 111 of the front case 110 is such that the screw 130 can be inserted so that the head of the screw 130 when seen from the rear side of the rear case 120 does not protrude from the rear case 120 when screwed. There is depth.

  In this embodiment, the screwing portion 111 and the groove portion 112 are provided on the contact surface 160a of the front case 110, and the through hole 121 and the wall portion 122 are provided on the contact surface 160b of the rear case 120. The waterproof case is not limited to this, and a through hole 121 may be provided in the front case 110, and a screwing portion 111 may be provided in the rear case 120. Further, as shown in FIG. 122 may be provided, and the groove 112 may be provided in the rear case 120.

Further, in this embodiment, the screwing portion 111 and the through hole 121 as the connecting means and the screw 130 (not shown ) are provided at the corners of each case as shown in FIG. 5, but the present invention is limited to this. Instead, it may be provided at two points on the virtual straight line 151 passing through the center 150 of the same plane and on the contact surface 160 and sandwiching the center 150 therebetween. Further, the groove portion 112 and the wall portion 122 are provided along the entire circumference of the edge portion of the contact surface 160 while passing through the inside of the screwing portion 111 and the through hole 121.

  In this embodiment, the wall 122 is provided along the entire circumference of the edge of the contact surface 160b of the rear case 120, but the present invention is not limited to this. The wall 122 need not be provided along the entire periphery of the edge, and a cutout or the like may be provided in a part of the wall 122.

  Further, in this embodiment, the waterproof case has been described by taking the in-vehicle camera as an example, but the waterproof case of the present invention is not limited to the in-vehicle camera, and is an electronic device that houses electronic components that break down when wet. Applicable to all waterproof cases.

  As described above, the waterproof case of the present invention does not deteriorate the waterproof performance even if the number of screws is reduced from four, since no gap is formed between the front case and the rear case.

DESCRIPTION OF SYMBOLS 100 Waterproof case 110 Front case 110a Lens 111 Screwing part 112 Groove part 120 Rear case 121 Through-hole 122 Wall part 130 Screw 140 Packing

Claims (2)

In a waterproof case configured by combining a front case and a rear case, and having a storage space therein, a contact surface is provided on a surface where the front case and the rear case contact each other, and the front case And two contact means are provided on the contact surface of the rear case, and each of the two connection means is on a virtual straight line passing through the center of the same plane on the plane surrounded by the contact surface. Located on the same abutment surface and sandwiching the same center ,
The contact surface of either the front case or the rear case has a shape protruding from the contact surface along the edge of the contact surface inside the connection means. A wall portion is provided, and the contact surface of the other case is provided with a groove-shaped groove portion that is inserted at a position facing the wall portion and prevents the wall portion from spreading. And waterproof case.   The waterproof case according to claim 1, wherein a packing is provided at a bottom of the groove.

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