JPH09100918A - Seal structure of waterproof case - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent water or the like from infiltrating into a waterproof case. SOLUTION: A rotatable plate-like cover 8 is provided at one of a case body and a case cover, and a flexible locking piece 9 is protrusively provided at one side of the cover 8, while a fixing locking piece 10 to the flexible locking piece 9 is protrusively provided at the other to form a waterproof cover part 11. In fitting, the cover 8 covers a butting part. A rotatable large cover 12 of recessed cross section is provided at one of the case body and the case cover, and a flexible locking piece 13 is protrusively provided at one side of the large cover 12, while a rotatable small cover 16 of protrusive cross section is provided at the other opposedly to the large cover, and a fixing locking piece 14 to the flexible locking piece 13 is protrusively provided to form a waterproof cover part 17 for a grommet. In the closed state, both covers 12, 16 are engaged with a cylindrical part, and the small cover 16 is fitted into the large cover 12 so as to be in close contact. Both covers 12, 16 thereby cover the butting part and an opening part. The waterproof cover part 17 for the grommet is provided at one end of a waterproof case A, and the waterproof cover part 11 is provided at the other end.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a waterproof cover sealing structure for preventing water or the like from entering a case.

[0002]

2. Description of the Related Art FIG. 8 shows a conventional seal structure of a waterproof cover. In FIG. 8, reference numeral 30 is an upper cover, and 31 is a lower cover abutting against the upper cover 30. A concave groove 32 is provided around the abutting portion 35 of the upper cover 30, and a seal packing 33 is mounted inside the groove 32. The lower cover 3 is attached to the abutting portion 35 of the lower cover 31.
A protrusion 34 is provided on the side wall 31 a of the first member in a direction intersecting with the abutting direction.

When the upper cover 30 and the lower cover 31 are butted against each other, the tip end of the side wall 31a is inserted into the groove 33 and engages with the seal packing 33. At the same time, the protrusion 34 and the outer wall 32a of the groove 33 come into contact with each other. However, when the high pressure water flow used for washing the vehicle directly hits the abutting portion 35 between the upper cover 30 and the lower cover 31, the abutting portion 35 is deformed by the water pressure and the seal packing 33 is also deformed. . As a result, water may enter the interiors of the abutted upper and lower covers, which may adversely affect, for example, electrical components mounted inside.

Therefore, in order to prevent the high-pressure water stream from directly hitting the abutting portion 35, another conventional example (actual flat blade 2-
No. 75781). In FIG.
Reference numeral 40 denotes a front open lower cover, 41 denotes an upper cover that closes the opening surface thereof, and the upper cover 41 and the lower cover 40 are coupled by screws 42. An inner frame 43 is provided upright inside the lower cover 40 to form a closed seal with the upper cover 41, and a sealing material 44 is provided on the peripheral end surface of the inner frame 43. A frame portion 45 of the same shape is formed on the inner surface of the upper cover 41 so as to be in close contact with the sealing material 44 of the inner frame 43.

With the above structure, the inner frame 43 and the frame portion 45 provided upright on the lower cover 40 are in close contact with each other via the sealing material 44. However, since the front surfaces of the upper cover 41 and the lower cover 40 are both open, the water flow may intrude through the open portion, and water may enter the inside of the combined cover.

[0006]

SUMMARY OF THE INVENTION In view of the above points, the present invention is a waterproof that prevents water from entering the inside of a case and prevents water from adhering to circuit boards, electrical components, etc. inside the case. It is an object to provide a case seal structure.

[0007]

In order to achieve the above object, the present invention comprises a case body B and a case lid C that is butted against the case body. The butted portion of the case body has a side wall tip. A protrusion 2 that intersects the abutting direction is provided in the vicinity of the engaging portion 1, and a receiving groove 4 for receiving the engaging portion is formed in the abutting portion of the case lid, and a seal packing 18 is attached to the receiving groove. In a waterproof case in which the abutting portion 4c at the tip of one side wall of the groove and the protruding portion 2 are brought into contact with each other so as to engage the engaging portion and the seal packing to waterproofly seal the abutting portion, the case body and the case lid are provided. A rotatable flat plate-like cover 8 is provided on either side of the cover, and a flexible locking piece 9 is provided on one side of the cover, and a fixed locking piece 10 for the flexible locking piece is provided on the other side. Is provided with a waterproof lid portion 11 A sealing structure of a waterproof case for covering the cover butt portion during mating of the Shiwagakari locking piece and the fixed locking piece and base. Also, a seal structure for a waterproof case is provided in which the cover is provided on one side wall of the receiving groove via a hinge 8a, the flexible locking piece is formed in an L shape, and the fixed locking piece is provided on the protrusion. It is valid. Further, a case body B, a case lid C that is butted against the case body, a tube 20 for inserting an electric wire, and a brim-shaped grommet body 23 having a peripheral groove 22 formed on the outer peripheral side are integrally formed through a tubular portion 24. And a grommet D formed in the case main body, and a side wall is cut out at an abutting portion of the case body to form an opening 3 into which the circumferential groove is fitted.
A receiving groove 5 for receiving the outer peripheral surface of the grommet main body and the engaging portion 1 at the side wall tip of the case main body is provided at the abutting portion of the case lid, and a seal packing 19 is attached to the receiving groove to open the peripheral groove. In a waterproof case in which the abutting portion is waterproofly sealed by fitting the grommet main body and the engaging portion to the seal packing, the concave cross-section is rotatable to either one of the case main body and the case lid. The large cover 12 is provided, and the flexible locking piece 1 is provided on one side of the large cover.
3, a small cover 16 having a convex cross-section
Is provided so as to face the large cover, and a grommet waterproof lid portion is provided by projecting a fixed locking piece 14 with respect to the flexible locking piece. Both covers engage the outer peripheral surface of the tubular portion when closed. A sealing structure of a waterproof case is adopted in which the small cover is fitted into the large cover and brought into close contact with each other while the two covers cover the abutting portion and the opening. In addition, the large cover is provided on one side wall of the receiving groove via the hinge 12a, and the flexible locking piece is formed in an L shape, and the outer wall surface of the case body is engaged with the outer peripheral surface of the grommet body. A waterproof case in which a bulging portion 14 having a U-shaped cross-section is provided, the fixed locking piece is provided on the bulging portion so as to project in the grommet insertion direction, and the small cover is provided on the fixed locking piece via a hinge 16a. The seal structure of is also effective. Furthermore, a waterproof case sealing structure in which the grommet waterproof lid portion 17 is provided at one end of the waterproof case A and the waterproof lid portion 11 is provided at the other end is also adopted.

According to the first structure of the present invention, the cover provided on either the case main body or the case lid is pivoted by the hinge to be closed. A flexible locking piece protruding from one side of the cover bends and fits into the fixed locking piece. Thus, the cover covers the abutting portion and maintains the closed state, so that even if a high-pressure water stream or the like directly hits the cover, the seal packing in the receiving groove is not deformed by the water pressure by the cover.

According to the second structure, the large cover provided on one of the case body and the case lid and the small cover provided on the other are rotated by the hinges to be closed. Then, the small cover having a convex cross-section is fitted into the large cover having a concave cross-section and is in close contact with each other. As a result, both covers engage the outer peripheral surface of the cylindrical portion of the grommet to cover the abutting portion and the opening. Further, the flexible locking piece of the large cover bends and fits into the fixed locking piece. As a result, since the large cover is kept closed, even if a high-pressure water stream or the like directly hits both covers, no water pressure is applied to the abutting portion and the opening by the both covers.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Specific examples of embodiments of the invention will be described below with reference to the drawings. 1 to 7 show an embodiment of a waterproof case sealing structure according to the present invention. In FIG. 1, A is a waterproof case, B is a case body, C is a case lid abutted against the case body 3, and D is a grommet fitted to the right end of the case A. The grommet D is a tube 20 for inserting an electric wire such as a wire harness.
It is known that the bellows portion 21 that is continuous with the rim and the brim-shaped grommet main body 23 having the peripheral groove 22 formed on the outer peripheral surface are integrally formed via the tubular portion 24.

At the abutting portion of the case main body B, a protrusion 2 is provided in the vicinity of the engaging portion 1 at the tip of the side wall of the case main body B at a portion other than the right end of the case main body B in a direction intersecting the abutting direction (see FIG. 4 and 6), a rectangular opening 3 into which the circumferential groove 22 of the grommet body 23 is inserted is cut out at the right end. At the abutting portion of the case lid C, a small groove 4 as a receiving groove for receiving the engaging portion 1 of the case body B is formed in a portion other than the right end of the case body B, and the outer periphery of the engaging portion 1 and the grommet body 23 is formed at the right end. A large groove 5 is provided as a receiving groove for receiving the surface. In the longitudinal direction of the case lid C, a flexible waterproof skirt portion 6 (see FIG. 5) is vertically provided in the abutting direction from the outer wall surface 4a of the small groove 4 as shown in FIG. A fitting protrusion 7 that engages with the protrusion 2 of the case body B is provided on the wall surface. Seal packings 18 and 19 are attached to the small groove 4 and the large groove 5.

At the left end of the waterproof case A, a waterproof cover 11 is provided as shown in FIG. 2 (a). Waterproof lid 11
Is provided with a flat plate-shaped cover 8 rotatable on the outer wall surface 4a of the small groove 4 via a hinge 8a, and an L-shaped flexible locking piece 9 is provided on a surface 8b of the cover 8 on the case body B side. A fixed locking piece 10 that fits into the flexible locking piece 9 is provided on the protrusion 2 in a protruding manner.
It is also possible to provide the cover 8 on the upper side of the small groove 4, the protrusion 2 or the case body B via a hinge. Then, it is possible to project the fixed locking piece 10 on the outer wall surface 4 a of the case lid C or the small groove 4 in correspondence with the position of the cover 8. In addition, when the fixed locking piece 10 is not provided on the protrusion 2,
The shape of the fixed locking piece 10 is preferably L-shaped.

At the right end of the waterproof case A, a grommet waterproof lid portion 17 is provided as shown in FIG. 3 (a).
The grommet waterproof lid portion 17 is provided with a large concave concave cover 12 on the outer wall surface 5a of the large groove 5 via a hinge 12a, and an L-shaped flexible member on a surface 12b of the large cover 12 on the case body B side. A stop piece 13 is provided so as to project. And the case body B
A bulging wall 14 is provided upright around the opening 3 of the grommet D.
The fixed locking piece 15 is projected on the side wall 14a of the bulging wall 14 orthogonal to the insertion direction of the bulge, and the convex small cover 16 is provided on the fixed locking piece 15 via the hinge 16a. A locking wall 16b that engages with the grommet body 23 is formed on the C side.

The large cover 12 may be provided on the case lid C, the bulging wall 14 or the case body B. It is also possible to provide a small cover on the case lid C, the large groove 5 or the case body B. Further, instead of projecting the fixed locking piece 15 on the bulging wall 14, it is also possible to project the L-shaped fixed locking piece 15 on the case body B.

Next, the case of assembling the waterproof case A by associating the case cover C with the case body B will be described. First,
As shown in FIG. 3B, the circumferential groove 22 of the grommet D is fitted into the opening 3 of the case body B. As shown in FIG. 2B, the protrusion 2 and the contact portion 4c at the tip of the one side wall 4a of the small groove 4 are brought into contact with each other to engage the engagement portion 1 with the seal packing 18, and the grommet body 23 and the expansion The outlet wall 14 and the seal packing 19 in the large groove 5 are engaged with each other. As a result, as shown in FIG. 6, the waterproof skirt portion 6 is slightly bent outward so that the protrusion 2 is fitted to the fitting protrusion 7 and the contact portion 4c.

Next, the cover 8 is rotated in the P direction of FIG. 2C to fit the flexible locking piece 9 and the fixed locking piece 10 as shown in FIG. 3 (b), the small cover 16 is rotated to bring the locking wall 16c into contact with the grommet body 23, and the large cover 12 is rotated in the R direction of FIG. ), The flexible locking piece 13 and the fixed locking piece 1
5 and fit together. As a result, as shown in FIG. 6, the large cover 12 is fitted into the small cover 16, the outer peripheral edge 16a of the small cover 16 and the inner peripheral edge 12a of the large cover 12 are fitted together, and the outer peripheral surface of the tubular portion 24 of the grommet D is fixed. The large cover 12 and the small cover 16 are engaged. Then, the locking wall 16b is engaged with the grommet body 23.

Therefore, as shown in FIG. 4, the abutting portion of the left end portion of the case A is covered with the cover 8 and the left end portion is waterproof-sealed by the waterproof wall portion 11. The abutting portion of the right end portion of the case A is covered with the large cover 12, the opening 3 is covered with the large cover 12 and the small cover 16, and the right end portion is waterproof-sealed by the grommet waterproof lid portion 17. As described above, the case A is assembled as shown in FIG. In this embodiment, the waterproof lid 11 is provided on one end of the case A and the grommet waterproof lid 17 is provided on the other end, but a case A having only one can be used.

[0018]

As described above, according to the first structure of the present invention, the cover is rotated by the hinge to be in the closed state, and the flexible locking piece and the fixed locking piece are fitted to each other. It is possible to cover the abutting portion of the case body and the case lid with the cover and maintain the closed state. Accordingly, even if a high-pressure water stream or the like directly hits the waterproof lid portion, the water pressure does not reach the receiving groove, so that the seal packing in the receiving groove is not deformed and water or the like can be prevented from entering the waterproof case.

Further, according to the second structure, the large cover and the small cover are respectively rotated by the hinges to be in the closed state, and the large cover is fitted into the small cover to bring the both covers into close contact with each other. The flexible locking piece and the fixed locking piece can be fitted to each other so that both covers can be kept in a closed state, and both covers in close contact with each other engage with the outer peripheral surface of the cylindrical portion of the grommet main body and the case main body and the case. The abutment with the lid covers both covers.

As a result, even if a high-pressure water stream or the like directly hits the grommet waterproof lid portion, the water pressure does not reach the opening and the abutting portion, so that water or the like can be prevented from entering the case. Therefore, even if a high-pressure water stream is used, water or the like does not enter the case, so that the water or the like does not adhere to the circuit board or the electrical components mounted in the case.

[Brief description of the drawings]

FIG. 1 is an exploded side view showing an embodiment of a waterproof case sealing structure according to the present invention.

2A and 2B are enlarged views of the waterproof lid portion, where FIG. 2A is a state before the case body and the case lid are butted, FIG. 2B is a state after butted, and FIG. , (D)
Indicates the closed state of the cover.

FIG. 3 is an enlarged view of a grommet prevention lid part, (a)
Shows a state before fitting the grommet, (b) shows a state after fitting, (c) shows a closed state of only the small covers, and (d) shows a closed state of both covers.

FIG. 4 is a side view showing a waterproof case according to the present invention.

FIG. 5 is a plan view of the same.

FIG. 6 is a front view of the same.

FIG. 7 is a perspective view of the same.

FIG. 8 is a side view showing a conventional waterproof case.

FIG. 9 is an exploded perspective view showing another conventional waterproof case.

[Explanation of symbols]

 A Waterproof Case B Case Body C Case Cover D Grommet 1 Engagement Part 2 Projection Part 3 Opening 8 Cover 9,13 Flexible Locking Piece 10,15 Fixed Locking Piece 11 Waterproof Lid 12 Large Cover 14 Bulging Wall 16 Small cover 17 Waterproof cover for grommet 22 Circumferential groove 23 Grommet body

Claims (5)

[Claims] 1. A case main body and a case lid that is abutted against the case main body, wherein a protrusion that intersects the abutting direction is provided in the abutting portion of the case main body in the vicinity of the engaging portion at the tip of the side wall. A receiving groove for receiving the engaging portion is formed in the abutting portion of the case lid, a seal packing is attached to the receiving groove, and the abutting portion at one end of one side wall of the receiving groove and the protruding portion are brought into contact with each other to engage the engagement. In a waterproof case in which a butt portion and a seal packing are engaged to waterproofly seal a butt portion, a rotatable flat plate-like cover is provided on either one of the case body and the case lid, and the cover is flexible on one side. A waterproof lid portion is provided, in which a locking piece is provided so as to project and a fixed locking piece for the flexible locking piece is provided so as to project, and the waterproof lid portion is provided when the flexible locking piece and the fixed locking piece are fitted to each other. Protective featured by the cover covering the butt Seal structure of the case. 2. The cover is provided on one side wall of the receiving groove via a hinge, the flexible locking piece is formed in an L shape, and the fixed locking piece is provided on the protrusion. The sealing structure for the waterproof case according to claim 1. 3. A grommet in which a case main body, a case lid abutted against the case main body, a tube through which an electric wire is inserted, and a brim-shaped grommet main body having a peripheral groove formed on the outer peripheral side are integrally formed via a tubular portion. The case body has an abutting portion with a side wall cut out to form an opening into which the circumferential groove is fitted, and the case lid abutting portion has an outer peripheral surface of the grommet body and a side wall tip of the case body engaged with each other. And a seal packing is attached to the receiving groove, the peripheral groove is fitted into the opening, and the grommet body and the engaging portion are engaged with the seal packing to form a butt portion. In a waterproof case for waterproof sealing, a rotatable large cover having a concave cross-section is provided on either one of the case body and the case lid, and a flexible locking piece is projected on one side of the large cover, and is rotated on the other side. Movable Such a cross-sectional convex small cover opposed to the large cover, provided the waterproof lid grommet formed by projecting the fixed locking piece for movable Shiwagakari locking piece,
The waterproof case is characterized in that both covers engage the outer peripheral surface of the cylindrical portion in the closed state, and the small covers are fitted into the large cover and brought into close contact with each other so that the both covers cover the abutting portion and the opening. Seal structure. 4. The large cover is provided on one side wall of the receiving groove via a hinge, the flexible locking piece is formed in an L shape, and an outer wall surface of the case body is engaged with an outer peripheral surface of the grommet body. A bulging portion having a U-shaped cross section is provided, the fixed locking piece is provided on the bulged portion so as to project in the grommet insertion direction, and the small cover is provided on the fixed locking piece via a hinge. The seal structure for the waterproof case according to claim 3. 5. The seal structure for a waterproof case according to claim 1, wherein the waterproof cover for grommet is provided at one end of the waterproof case A, and the waterproof cover is provided at the other end.