JP2015176918A - Waterproof structure of housing and electronic apparatus equipped with the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To waterproof an abutting surface by one seal material when a housing is made of a plurality of members and lids in the housing of an electronic apparatus.SOLUTION: The housing 1 includes: a case 3; a battery box 4; a packing 5; a bottom case 6; and a battery lid 7. To a projection 10 of the battery box 4 housed inside the case 3, the packing 5 is attached whose cross-section is formed in a U shape. The packing 5 is pressed by each of an inner wall surface 14, a pressing surface 16 and a lid wall part 17, and can waterproof each abutting surface by being bonded between the battery box 4 and the case 3, the battery box 4 and the bottom case 6, and the battery box 4 and the battery lid 7.

Description

  The present invention relates to a housing of an electronic device that houses an electronic circuit, and more particularly to a waterproof structure of the housing.

  The housing of the electronic device is mainly made of a resin material, and electronic circuits made of various electronic components are accommodated inside the housing. These electronic circuits are protected from external water by a housing.

  These housings are usually composed of a plurality of members such as a case in which an electronic circuit is accommodated and a cover that covers the opening of the case. The surface where members constituting the casing come into contact (this surface is referred to as a contact surface in the present specification) is usually provided with a sealing material to prevent water from entering the casing and is waterproofed. .

  FIG. 7 shows a waterproof structure of a casing 70 of an electronic device in which a casing body is composed of a conventional case 71 and a cover 72. The casing body may be composed of a plurality of members such as a case 71 and a cover 72 as in this conventional example for convenience in molding and for ease of assembly.

  The cover 72 is provided with a groove 73 on the entire circumference of the contact surface with the case 71. In addition, the case 71 is provided with protrusions 74 on the entire circumference with a width B narrower than the width A of the groove 73 so that the case 71 can be fitted into the groove 73. Further, a sealing material 75 having elasticity is provided in the groove 73 over the entire circumference of the groove 73. Further, by sandwiching the sealing material 75 between the protrusion 74 and the groove 73, the sealing material 75 is deformed and is brought into close contact with the case 71 and the cover 72, so that entry of water from the outside can be prevented.

  Further, Patent Document 1 and Patent Document 2 are disclosed in which various ideas are added to the shape of the sealing material in order to improve waterproofness.

JP 08-331673 A JP 2003-258450 A

  However, when the cover 72 is provided with a cover 76 from which the battery accommodated in the housing 70 can be taken out as shown in FIG. 7, not only the contact surfaces of the case 71 and the cover 72 but also the cover 72 and the cover 76. It was necessary to take a waterproofing with the sealing material 77 also on the contact surface. In such a case, it is necessary to provide as many sealing materials as the number of contact surfaces, and further, the processing of the members for providing the sealing materials and the complexity of the assembly of the housing due to an increase in the number of parts have been problems.

  An object of the present invention is to solve the above-described problems by waterproofing each abutting surface with a single sealing material when the casing includes a plurality of members and a lid.

  The housing according to claim 1 is fixed to the first case having the first opening, the inner case having the second opening accommodated in the first case, and the first case. In a housing having a second case having a third opening, the inner case is housed in the case so that the first opening and the second opening coincide with each other, and surrounds the second opening A protrusion provided in the inner case, a U-shaped sealing material provided to fit the protrusion, a pressing surface provided in the second case for pressing the sealing material in the protruding direction, and a sealing material A seal contact portion of the first case provided so as to press and a lid covering the first opening, the second opening, and the third opening so as to press the sealing material in the protruding direction. It is characterized by that.

  The housing according to claim 2 is the housing according to claim 1, wherein the sealing material has a first convex portion on the surface facing the pressing surface, a second convex portion on the surface facing the lid, and a seal contact portion. The surface which opposes is provided with the 3rd convex part, It is characterized by the above-mentioned.

  According to a third aspect of the present invention, there is provided an electronic apparatus having the housing according to the first or second aspect.

  According to the present invention, when the casing includes a plurality of members and a lid constituting the casing main body, waterproofing of each contact surface can be realized with a single sealing material. As a result, the number of parts can be reduced. In addition, the housing can be easily assembled. Moreover, it is not necessary to perform the process which provides a groove | channel etc. in the member which comprises a housing | casing.

It is an external view of the housing | casing of the electronic device which concerns on Example 1 of this invention. It is the figure which decomposed | disassembled and showed the housing | casing of the electronic device which concerns on Example 1 of this invention for every main structural member. It is the figure which looked at the housing | casing of FIG. 1 from the battery cover direction. It is the figure which expanded and showed the battery cover periphery of the XX cross section in FIG. It is the figure which expanded and showed the battery cover periphery of the YY cross section in FIG. (A)-(d) is the figure which showed the cross section of the packing of Example 2 to Example 5 of this invention, respectively. It is sectional drawing which showed the waterproof structure of the housing | casing of the conventional electronic device.

  Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the drawings. It should be noted that the present invention is not limited by the mode for carrying out the invention, and all other modes, examples, operational techniques, etc. that can be implemented by those skilled in the art based on this mode are all within the scope of the present invention. included.

[Example 1]
Hereinafter, a first embodiment for carrying out the invention will be described with reference to FIGS. FIG. 1 is an external view of a housing 1 of an electronic device. FIG. 2 is an exploded view of the main component 1 of the casing 1 of the electronic device.

  FIG. 3 is a view of the housing 1 of FIG. 1 viewed from the battery lid 7 direction. FIG. 4 is an enlarged view of the periphery of the battery lid 7 in the XX section in FIG. Further, FIG. 5 is an enlarged view showing the periphery of the battery lid 7 in the YY section in FIG.

  A casing 1 of an electronic device described in the present embodiment includes a case 3 that is a first case, a battery box 4 that is an inner case, a packing 5 that is a sealing material, and a bottom case 6 that is a second case. And a battery lid 7 as a lid.

  The case 3 accommodates therein an electronic circuit made up of electronic components (not shown) and the battery box 4. Furthermore, the case 3 includes a case opening 8 that is a first opening for taking in and out a battery and the like.

  In the drawings of this embodiment, the case 3 is schematically represented. However, in an actual electronic device, operation portions such as buttons, levers, and switches are attached to the surface of the case 3. In addition to the battery box 4, the case 3 is large enough to have a space for storing an electronic circuit (not shown).

  The battery box 4 contains a battery and a battery (not shown) inside. The battery box 4 includes a battery box opening 9 that is a second opening for taking in and out a battery and the like. Further, a protrusion 10 is provided on the battery box 4 so as to surround the battery box opening 9. The protrusion 10 has a wall shape.

  The battery box 4 is housed inside the case 3 and fixed at a predetermined position of the case 3 by fixing means (not shown). By making the battery box 4 which is the case 3 and the inner case separate as in the present embodiment, the inside of the case 3 can be shaped with less unevenness, and when the case 3 is molded, there is a sink on the surface. It can be prevented from occurring.

  The packing 5 is deformed when other members are pressed, and is in close contact with the pressed member without gaps, thereby realizing a waterproof structure that prevents water from entering the housing 1 of the electronic device. The packing 5 is made of a resin or rubber material so as to be deformed and prevent water from entering.

  In addition, the outline of the packing 5 when viewed from the direction of the battery lid 7 has substantially the same shape as the battery box opening 9. Furthermore, as shown in FIG. 4, the cross-sectional shape is a U-shape, and for each part, the outer peripheral part in FIG. 4 is the first wall part 11, the inner part is the second wall part 12, The upper part is referred to as a tip part 13. The packing 5 is provided by being fitted to the protrusion 10 of the battery box 4 at the first wall portion 11 and the second wall portion 12.

  Further, the first wall portion 11 of the packing 5 is an inner wall surface that is a seal contact portion of the case 3 provided so as to press the packing 5 when the battery box 4 to which the packing 5 is attached is accommodated in the case 3. 14 so as to be in contact with 14. Thereby, the 1st wall part 11 of the packing 5 deform | transforms, it adheres between the case 3 and the battery box 4, and waterproofing is ensured.

  The bottom case 6 is fixed to the case 3 by fixing means such as screws (not shown). Similar to the case 3, a bottom case opening 15, which is a third opening for inserting and removing the battery, is provided.

  Further, the bottom case 6 includes a pressing surface 16, and the pressing surface 16 presses the tip portion 13 of the packing 5 toward the protrusion 10 of the battery box 4. Thereby, the packing 5 deform | transforms, it adheres between the bottom case 6 and the battery box 4, and the waterproofing is ensured. Furthermore, since the front end portion 13 of the packing 5 is pressed by the pressing surface 16 of the bottom case 6, the packing 5 is rolled up and detached from the protrusion 10 of the battery box 4 when the battery lid 7 is attached and removed. There is no.

  The battery lid 7 is a lid that covers the case opening 8, the battery box opening 9, and the bottom case opening 15. The battery lid 7 has a lid wall portion 17. When the battery lid 7 is attached to the housing body 2, the lid wall portion 17 presses the second wall portion 12 of the packing 5 toward the protrusion 10. Thereby, the packing 5 deform | transforms, it adheres between the battery cover 7 and the battery box 4, and the waterproofing is ensured.

  Further, the battery lid 7 of this embodiment includes a knob 18, a lid packing 19, a lid plate 20, a battery contact 21, a rotation stopper 22, and a screw 23.

  The knob 18 is rotatably attached to the lid plate 20, and the battery lid 7 is fixed by rotating the knob 18 so that the lock piece 24 fits into the lock groove 25 of the bottom case 6.

  The lid packing 19 is a sealing material that is provided between the knob 18 and the lid plate 20 and ensures waterproofing between the knob 18 and the lid plate 20.

  The lid plate 20 has a lid wall portion 17 and a mounting hole 26. A knob 18 is rotatably attached to the attachment hole 26 by a screw 23.

  The battery contact 21 is a conductive member that connects electrodes of a battery (not shown) accommodated in the battery box 4. A plurality of batteries accommodated in the battery box 4 can be connected in series or in parallel by the battery contacts 21.

  Further, when the battery contact 21 rotates in accordance with the knob 18, there is a possibility that the electrode is scratched by rubbing against the battery electrode. Therefore, in this embodiment, the battery contact 21 is fixed to the lid plate 20 by the screw 23 via the rotation stopper 22 so that the battery contact 21 does not rotate.

  The screw 23 is attached to the knob 18 via a detent 22, a battery contact 21, and a lid plate 20.

  As described above, in this embodiment, a plurality of contact surfaces between the case 3 and the battery box 4, between the bottom case 6 and the battery box 4, and between the battery lid 7 and the battery box 4 are provided as one sealing material. The gasket 5 is waterproof.

  Further, in the conventional waterproof structure, a groove is provided in order to provide a sealing material in a case or the like constituting the exterior of the housing. If such a groove is provided, the thickness of the case, etc. will not be uniform, and if wrinkle processing (processing to provide a wrinkle pattern) is performed on the surface of the housing, wrinkle unevenness will occur, which will affect the appearance of the housing. It was.

  However, since the casing can be waterproofed without providing a groove in the members constituting the casing of this embodiment, the thickness of the case can be made uniform, and when the texture is processed, The effect that no occurs.

[Example 2]
A waterproof structure of the housing of the electronic device according to the second embodiment will be described with reference to FIG. FIG. 6A is a view showing the periphery of the battery box and packing of this example. The description of the same configuration as in the first embodiment is omitted.

  In the second embodiment, the shape of the packing 30 is different from that of the first embodiment. The packing 30 has a first convex portion 32 at the distal end portion 31. In this embodiment, when the bottom case 6 is attached to the case 3, the pressing surface 16 of the bottom case 6 comes into contact with the first convex portion 32, and the first convex portion 32 is pressed and deformed. As a result, the battery box 4 and the bottom case 6 are in close contact with each other via the packing 30 to ensure waterproofness.

  In the packing 5 of Example 1, waterproofing could not be performed unless the tip portion 13 was in contact with the pressing surface 16 without a gap. On the other hand, in this embodiment, the packing 30 has the first convex portion 32, so that the first convex portion 32 of the packing 30 is pressed in a point contact state from the bottom case 6 when viewed from the cross section. Is done. Thereby, the packing 30 can be in close contact with the bottom case 6 more stably than in the first embodiment, and can be more reliably waterproofed.

  Further, it is desirable that the first convex portion 32 is located on the protrusion 10 via the tip portion 31 when viewed from the cross section so that the packing 30 is in close contact with the battery box 4.

[Example 3]
A waterproof structure of the housing of the electronic device according to the third embodiment will be described with reference to FIG. FIG. 6B is a view showing the periphery of the battery box and packing of this example. The description of the same configuration as in the first embodiment is omitted.

  In the third embodiment, the shape of the packing 40 is different from that of the first embodiment. The packing 40 has a second convex portion 42 on the second wall portion 41. In the present embodiment, when the battery lid 7 is attached to the housing body 2, the lid wall portion 17 and the second convex portion 42 come into contact with each other, and the second convex portion 42 is pressed and deformed. As a result, the battery box 4 and the battery lid 7 are in close contact with each other via the packing 40 to ensure waterproofness.

  In the packing 5 of Example 1, waterproofing could not be performed unless the second wall portion 12 was in contact with the lid wall portion 17 without a gap. On the other hand, in this embodiment, the packing 40 has the second convex portion 42, so that the second convex portion 42 of the packing 40 is pressed in a point contact state from the battery lid 7 when viewed from the cross section. Is done. Accordingly, the packing 40 can be in close contact with the battery lid 7 more stably than in the first embodiment, and can be more reliably waterproofed.

  In addition, it is desirable that the second convex portion 42 protrudes from the inner wall surface of the battery box 4 so that the packing 40 reliably makes point contact with the battery lid 7 when viewed from the cross section. Further, it is desirable that the second convex portion 42 is located on the protrusion 10 via the second wall portion 42 when viewed from the cross section.

[Example 4]
A waterproof structure of the housing of the electronic device according to the fourth embodiment will be described with reference to FIG. FIG. 6C is a view showing the periphery of the battery box and packing of this example. The description of the same configuration as in the first embodiment is omitted.

  In the fourth embodiment, the shape of the packing 50 is different from that of the first embodiment. The packing 50 has a third convex portion 52 on the first wall portion 51. In this embodiment, when the battery box 4 is accommodated in the case 3, the inner wall surface 14 of the case 3 and the third convex portion 52 come into contact with each other, and the third convex portion 52 is pressed and deformed. As a result, the battery box 4 and the case 3 are in close contact with each other via the packing 50 to ensure waterproofness.

  In the packing 5 of Example 1, waterproofing could not be performed unless the first wall portion 11 was in contact with the inner wall surface 14 without a gap. On the other hand, in this embodiment, the packing 50 has the third convex portion 52, so that the third convex portion 52 of the packing 50 is pressed in a point contact state from the case 3 when viewed from the cross section. The Thereby, the packing 50 can be in close contact with the case 3 more stably than in the first embodiment, and waterproofing can be performed more reliably.

  In addition, it is desirable that the third convex portion 52 protrudes from the outer wall surface of the battery box 4 so that the packing 50 reliably makes point contact with the case 3 when viewed from the cross section. Further, it is desirable that the third convex portion 52 is located on the protrusion 10 via the first wall portion 51 when viewed from the cross section.

[Example 5]
A waterproof structure of the housing of the electronic device according to the fifth embodiment will be described with reference to FIG. FIG. 6D is a view showing the periphery of the battery box and packing of this example. The description of the same configuration as in the first embodiment is omitted.

  In the fifth embodiment, the shape of the packing 60 is different from that of the first embodiment. The packing 60 has a first convex portion 64 at the distal end portion 61, a second convex portion 65 at the second wall portion 62, and a third convex portion 66 at the first wall portion 63. Thereby, the effect of Example 2, Example 3, and Example 4 can be acquired simultaneously, and more reliable waterproofing can be performed.

  In addition, the shape of the packing may be a shape obtained by arbitrarily combining the shapes described in the second to fourth embodiments, and any shape can provide more reliable waterproofing than the first embodiment.

  Moreover, in the above embodiment, since the battery cover has a knob, the battery cover can be attached and detached to replace the battery without using a tool such as a screwdriver. Furthermore, the operation can be facilitated by enlarging the knob. Moreover, you may comprise a battery cover using the member with a groove | channel so that a battery cover can be fixed with a driver, a coin, etc. instead of a knob.

DESCRIPTION OF SYMBOLS 1,70 ... Housing | casing 2 ... Housing | casing main body 3 ... Case 4 ... Battery box 5, 30, 40, 50, 60 ... Packing 6 ... Bottom case 7 ... Battery cover 8 ... Case opening part 9 ... Battery box opening part 10 ... Projection 11, 51, 63 ... First wall portion 12, 41, 62 ... Second wall portion 13, 31, 61 ... Tip portion 14 ... Inner wall surface 15 ... Bottom case opening 16 ... Pressing surface 17 ... Lid wall portion

Claims (3)

A first case having a first opening;
An inner case having a second opening that is housed within the first case;
In a housing provided with a second case having a third opening fixed to the first case,
The inner case is housed in the case so that the first opening and the second opening coincide;
A protrusion provided on the inner case so as to surround the second opening;
A sealing material having a U-shaped cross-section provided by fitting to the protrusion;
A pressing surface provided in the second case for pressing the sealing material in the protruding direction;
A seal contact portion of the first case provided to press the seal material;
A housing comprising a cover that covers the first opening, the second opening, and the third opening so as to press the sealing material in the protruding direction. The housing according to claim 1, wherein the sealing material has a first convex portion on a surface facing the pressing surface,
A second convex portion on the surface facing the lid;
A housing having a third convex portion on a surface facing the seal contact portion. An electronic apparatus comprising the housing according to claim 1.

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