JP2534216Y2 - Waterproof structure of housing - 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 for a housing.

[0002]

2. Description of the Related Art FIG. 4 is a sectional view of a housing of an electronic device having a waterproof structure. An operation panel 102 is fixed to an opening of the case 100 with a screw 103 with a waterproof sheet 101 interposed therebetween. Tact switch 104 in case 100
Can be operated by pressing a projection 105 integrally formed on the waterproof sheet 101 from a hole provided in the operation panel 102.

FIG. 5 is a sectional view of a housing of another electronic device having a waterproof structure. A switch panel 201 is provided in an opening of the case 200 via an O-ring. The switch panel 201 and the switches 202 provided on the switch panel 201 are covered with a waterproof sheet 203. An operation panel 204 is overlaid on the waterproof sheet 203. The operation panel 204, the waterproof sheet 203, and the switch panel 201 are fixed to the case 200 by screws 205. The operation section of the operation switch 202 is covered with a waterproof sheet 203 and the operation panel 204
Projecting upwards.

[0004]

According to the conventional waterproof structure shown in FIG. 4, an outer peripheral portion of a waterproof sheet 101 sandwiched between a case 100 and an operation panel 102 for waterproofing is provided at a central portion. It has a continuous flat plate shape.
For this reason, the pressure contact area between the case 100 and the operation panel 102 for holding the operation panel 102 is large, and in order to obtain a sufficient waterproofing effect, the operation panel 102 is increased in the number of screwed portions and the operation panel 102 is strongly pressed against the case 100. There must be.

According to the conventional waterproof structure shown in FIG. 5, waterproofing of the outer peripheral portion of the switch panel 201 and waterproofing of the switch 202 provided on the switch panel 201 are individually performed by an O-ring and a waterproof sheet 203, respectively. The number of parts was increased. Also, the waterproof sheet 20
3 is flat and is simply sandwiched between the switch panel 201 and the operation panel 204.
Was sometimes shifted.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a waterproof structure of a housing in which the number of parts is small, the displacement of the waterproof sheet hardly occurs, and a reliable waterproof performance can be obtained with a relatively small tightening force.

[0007]

According to a first aspect of the present invention, there is provided a waterproof structure for a housing, wherein the waterproof structure for a housing covers an opening of the housing with a panel. Seal groove, a surface covering the opening and a waterproof sheet having an outer peripheral portion that is press-fitted into the seal groove with a slightly larger outer shape than the seal groove, wherein the panel is mounted on the waterproof sheet. The outer peripheral portion is brought into close contact with the inner surface of the seal groove by press-fitting the outer peripheral portion into the inside of the seal groove.

[0008] The waterproof structure of the housing described in claim 2 is
In a waterproof structure of a housing having an upper case and a lower case, a seal groove formed continuously around an opening of the lower case of the housing, a surface portion covering the opening and an outer shape slightly larger than the seal groove. A waterproof sheet having an outer peripheral portion press-fitted into the seal groove, and a panel covering the opening from above the waterproof sheet, and pressing the outer periphery of the panel with the upper case to form the outer peripheral portion. It is characterized in that the outer peripheral portion is brought into close contact with the inner surface of the seal groove by press-fitting into the inside of the seal groove.

[0009]

[Function] The outer peripheral portion of the waterproof sheet is pressed by the panel and closely adheres to the inner surface of the seal groove to exert a reliable waterproof effect. Since the outer periphery of the waterproof sheet is fixed to the seal groove, even if the panel is fixed to the housing or the lower case side of the housing, the position is not easily shifted.

[0010]

1 is a sectional view of a housing 1 of an electronic device having a waterproof structure, for example, a radio control transmitter. The housing 1 is
It has a box-shaped lower case 2 provided with an opening on the upper surface, and a frame-shaped upper case 4 fixed on the upper surface surrounding the opening of the lower case 2 by fixing means such as screws 3.

A switch panel 5 is attached to an opening of the lower case 2. Various operation switches 6 are attached to the switch panel 5.

On the switch panel 5, a waterproof sheet 7 made of a waterproof material such as rubber as shown in FIG. In the waterproof sheet 7, a cap-shaped waterproof cover 8 that covers the operation portion 6 a of the operation switch 6 is integrally formed on a surface portion corresponding to the switch panel 5.

The outer peripheral portion 10 surrounding the surface portion 9 of the waterproof sheet 7 is thicker than the surface portion 9 as shown in FIGS. The cross-sectional shape of the outer peripheral portion 10 is substantially circular in this embodiment. The outer peripheral portion 10 protrudes downward from the lower surface side of the surface portion 9, and thus the upper surface of the waterproof sheet 7 is substantially flat.

On the upper surface surrounding the opening of the lower case 2, a seal groove 11 is formed so as to surround the opening. The seal groove 11 is provided on the outer peripheral portion 10 of the waterproof sheet 7.
Is a portion to be inserted, and its shape is slightly smaller than the outer shape of the outer peripheral portion 10.

The waterproof sheet 7 is overlaid on the upper surface of the switch panel 5. The surface 9 of the waterproof sheet 7 overlaps the switch panel 5 and the waterproof cover 8 of the waterproof sheet 7
Covers the operation portion 6a of the corresponding operation switch 6, and the outer peripheral portion 10 faces the seal groove 11 of the lower case 2.

An operation panel 1 is provided on the upper surface of the waterproof sheet 7.
Two are overlaid. A switch hole is formed at a key portion of the operation panel 12, and the operation switch 6 covered with the waterproof cover 8 projects upward. The upper case 4 is fixed to the lower case 2 with screws 3.
Presses and fixes the outer peripheral portion 10 of the operation panel 12 to sandwich the waterproof sheet 7 between the switch panel 5 and the waterproof sheet 7. As a result, the surface portion 9 of the waterproof sheet 7 is fixed between the panels 5 and 12, and the outer peripheral portion 10 of the waterproof sheet 7 is pressed into the seal groove 11 of the lower case 2 and closely adheres to the inner surface.

According to the housing 1 of this embodiment, the waterproof sheet 7
The O-ring-shaped thick portion provided on the outer peripheral portion 10 is press-fitted into a circumferential seal groove 11 provided on the lower case 2, and is pressed and fixed by the upper case 4 via the operation panel 12 to provide a waterproof structure. Therefore, the pressure contact area of the seal portion is small, and the displacement of the waterproof sheet 7 is unlikely to occur, so that a sufficient waterproof effect can be obtained even if the number of screw fixing portions for fixing the upper case 4 is small.

In the present embodiment, the outer peripheral portion 10 of the waterproof sheet 7 protrudes from the lower surface, but may have a shape protruding from both surfaces. In this case, the protrusion on the lower surface side of the outer peripheral portion 10 is pressed into the seal groove 11 as in FIG. 3, but the protrusion on the upper surface side is further pressed against the lower surface of the operation panel 12, so that the sealing performance is further improved.

In this embodiment, the switch panel 5 and the operation panel 12 sandwiching the waterproof sheet 7 are pressed and fixed to the lower case 2 side by the upper case 4, but the switch panel 5 and the operation panel 12 sandwiching the waterproof sheet 7 are It may be directly fixed to the lower case 2 integrally with a screw. When the frame-shaped upper case 4 is used as in the above-described embodiment, the operation panel 12 is protected and can be used as a mounting portion for another exterior member.

[0020]

According to the waterproof structure of the housing according to the present invention,
The shape of the thick part provided on the outer peripheral part of the waterproof sheet is slightly larger than the shape of the seal groove at the opening of the housing, and if it is pressed into the peripheral seal groove and pressed with a panel, the outer peripheral part is inside the seal groove The waterproof sheet is pressed into the inner surface and closely adheres to the inner surface, so that the displacement of the waterproof sheet hardly occurs, and a reliable waterproof performance can be obtained with a relatively small fixing force while having a small number of parts.

[Brief description of the drawings]

FIG. 1 is a sectional view of a first embodiment of the present invention.

FIG. 2 is a plan view and a partial cross-sectional view of the waterproof sheet according to the first embodiment of the present invention.

FIG. 3 is an enlarged sectional view of a main part of the first embodiment of the present invention.

FIG. 4 is a sectional view of a housing having a conventional waterproof structure.

FIG. 5 is a sectional view of a housing having a conventional waterproof structure.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Housing 2 Lower case 4 Upper case 5 Switch panel 7 Waterproof sheet 9 Surface part 10 Outer peripheral part 11 Seal groove 12 Operation panel

Claims (2)

(57) [Scope of request for utility model registration] 1. A waterproof structure for a housing in which an opening of a housing is covered with a panel, wherein a sealing groove formed continuously around the opening, a surface covering the opening and the sealing groove are provided.
A waterproof sheet having an outer peripheral portion that is pressed into the seal groove with a slightly larger outer shape, and the panel is mounted on the waterproof sheet and the outer peripheral portion is placed inside the seal groove.
A waterproof structure for a housing, wherein the outer peripheral portion is brought into close contact with the inner surface of the seal groove by press-fitting . 2. A waterproof structure for a housing having an upper case and a lower case, wherein the waterproof structure is provided around an opening of the lower case of the housing.
A continuously formed seal groove, a surface portion covering the opening and an outer shape slightly larger than the seal groove are formed in the seal groove.
A waterproof sheet having an outer peripheral portion to be press-fitted, and a panel covering the opening from above the waterproof sheet, and pressing the outer periphery of the panel with the upper case so that the outer peripheral portion is inside the seal groove. And press-fit the outer peripheral part to the
A waterproof structure for the housing, which is in close contact with the inner surface of the seal groove .