JP2009111600A - Waterproof structure of case, and electronic apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily fix divided cases by a small number of hook portions and to achieve reliable waterproofing without a fall of a gasket due to vibrations etc., in the waterproof structure of the cases. <P>SOLUTION: The waterproof structure includes a first case 1 and a second case 2 which are put together one over the other in one body, and the gasket 3 disposed over the entire periphery between the first and second cases, and the first case 1 includes a protrusion portion 13, disposed apart inside an inner peripheral surface of the second case 2, over the entire periphery. The gasket 3 is pressed in between the protrusion portion 13 and the inner peripheral surface of the second case 2, and the gasket 3 is fitted to the protrusion portion 13. Specifically, the gasket 3 is fixed to at least the outer peripheral surface and the tip surface of the protrusion portion 13. Further, the second case 2 includes at least an inner wall 24 disposed apart inside the protrusion portion 13, and the inner wall 24 is fixed to the inner peripheral surface of the first case 1. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a waterproof structure of a housing and an electronic apparatus including a housing having the waterproof structure.

2. Description of the Related Art A portable electronic device generally has a structure in which a gasket is fitted into a groove provided in two divided cases and waterproofed (see, for example, Patent Document 1).
As a waterproof structure of a portable transmitter, there is a structure in which a peripheral end of a waterproof cover is disposed between two cases and the waterproof cover is sandwiched between the two cases (see Patent Documents 2 and 3).
As a waterproof structure of the scale, there is also a waterproof structure in which an end portion of a waterproof diaphragm formed of soft rubber is press-fitted into a recessed engagement groove provided in the case (see Patent Document 4).
JP 2002-198664 A JP-A-11-288635 JP 2004-31621 A JP 2003-322556 A

However, as in the structure of Patent Document 1 or Patent Documents 2 and 3, when the packing or the waterproof cover end is sandwiched from above and below by two divided cases, an elastic force is exerted in the vertical (vertical) direction. Therefore, a large number of screws or a large number of hooks are required to fix the divided case.
In addition, as in the structure of Patent Document 4, just by pressing the end of the soft rubber waterproof diaphragm into the recess-like engagement groove provided in the case, the end of the waterproof diaphragm comes off due to vibration, etc. There was a risk that the waterproof function would be impaired.

  SUMMARY OF THE INVENTION An object of the present invention is to facilitate waterproofing in a waterproof structure of a housing, which can be easily performed with a hook portion or the like in which a divided housing is less fixed and does not come off due to vibration or the like.

  In order to solve the above-described problems, the invention described in claim 1 includes a first housing and a second housing that are overlapped and united, and an entire circumference between the first housing and the second housing. The first casing is provided with a convex portion located on the inner circumference with respect to the inner peripheral surface of the second casing, and the packing is disposed. Is press-fitted between the convex portion and the inner peripheral surface of the second casing, and the packing is attached to the convex portion.

  The invention according to claim 2 is the waterproof structure of the housing according to claim 1, wherein the packing is fixed to at least an outer peripheral surface and a tip surface of the convex portion.

  Invention of Claim 3 is the waterproof structure of the housing | casing of Claim 1 or 2, Comprising: In the said 2nd housing | casing, the inner side wall located inwardly spaced apart with respect to the said convex part is at least. It is provided partially, and this inner wall is fixed to the inner peripheral surface of the first casing.

  The invention according to claim 4 is the waterproof structure of the casing according to any one of claims 1 to 3, wherein either one of the first casing and the second casing has a vibration source. Is provided.

  According to a fifth aspect of the present invention, there is provided an electronic apparatus including the housing having the waterproof structure according to any one of the first to fourth aspects.

  According to the present invention, the elastic force does not act in the vertical direction, and no repulsive force is generated between the housings to be fixed. Since the packing is integrally formed in one housing, the waterproofing can be ensured without the packing being detached even by vibration.

Hereinafter, the best mode for carrying out the present invention will be described in detail with reference to the drawings.
(Embodiment 1)
1 to 3 show a case of a mobile phone as a configuration of Embodiment 1 of an electronic apparatus to which the present invention is applied. 1 is an upper case (hereinafter referred to as a first case), and 2 is a lower part. Case (hereinafter referred to as second case), 3 is packing, 4 is a liquid crystal display panel, 5 is a middle case, 6 is a substrate, 7 is a transmission panel, 8 is a cushion, 9 is a vibration unit (vibration source) The display body will be described.

  In this embodiment, the waterproof structure is applied to the first casing 1 and the second casing 2 constituting the display unit main body of the foldable mobile phone, and the packing 3 arranged around the entire circumference therebetween. 3 is made of rubber.

  Here, in the illustrated example, the liquid crystal display panel 4, the middle case 5, the substrate 6, and the like are accommodated between the first housing 1 and the second housing 2. In addition, a transmission panel 7 that transmits the screen of the liquid crystal display panel 4 is attached to the first casing 1 via a cushion 8, and a vibration unit 9 is bonded and fixed to the inner surface of the transmission panel 7. The vibration unit 9 is composed of a piezoelectric element, and the transmission panel 7 functions as a diaphragm of the panel speaker due to the vibration.

  The first housing 1 has a sound reporting hole 11 on one end side and a hinge boss 12 on the other end side. The above display unit main body is connected to an operation unit main body (not shown) via a hinge part so as to be foldable. The operation unit main body may have the same waterproof structure as the configuration of the first casing 1 and the second casing 2.

  Specifically, a convex portion 13 is formed on the entire circumference of the first housing 1 and is located inwardly with respect to the inner peripheral surface of the second housing 2 in the combined state. In the second housing 2, a concave portion 23 that receives the convex portion 13 of the first housing 1 when combined is formed on the entire circumference, and an inner wall 24 is formed on the inner peripheral side of the concave portion 23. Due to the presence of the inner wall 24, the recess 23 looks like a groove. The inner wall 24 may be formed on the entire circumference of the second housing 2 or may be formed partially (for example, portions along both parallel side portions).

  And the packing 3 is attached to the convex part 13 of the 1st housing | casing 1, and is press-fitted between the internal peripheral surfaces of the 2nd housing | casing 2. FIG. That is, the packing 3 is provided on the convex portion 13 by, for example, integral molding (insert molding or two-color molding) of liquid silicon or elastomer when the first housing 1 is molded. In the illustrated example, the packing 3 is fixed to the outer peripheral surface, the tip end surface, and the inner peripheral surface of the convex portion 13, and the fixed portion to the outer peripheral surface is the thickest.

  Furthermore, the hook portion 15 is partially formed on the inner peripheral surface of the first housing 1 (for example, two places on both side portions parallel to each other), while protruding upward from the inner wall 24 of the second housing 2. The part 24a (see FIG. 3) is formed with a partial engagement hole 25 with which the hook part 15 is engaged.

  The first housing 1 and the second housing 2 are combined by press-fitting the packing 3 integral with the convex portion 13 of the first housing 1 into the inner peripheral surface of the second housing 2, so that the convex portion 13 is secondly inserted. While inserting into the recessed part 23 of the housing | casing 2, the hook part 15 of the internal peripheral surface of the 1st housing | casing 1 is inserted in the engagement hole 25 of the inner side wall 24 of the 2nd housing | casing 2, and is engaged.

  As described above, according to the waterproof structure of the housing of the embodiment, the packing 3 integral with the convex portion 13 of the first housing 1 is press-fitted into the inner peripheral surface of the second housing 2 and waterproofed. The elastic force does not act in the (up and down) direction, and no repulsive force is generated between the first housing 1 and the second housing 2 to be fixed. The hook portion 15 and the engagement hole 25 can be fixed, and the divided first housing 1 and second housing 2 can be easily fixed.

  In addition, since the packing 3 is integrated with the convex portion 13 of the first housing 1, the packing 3 is also detached by vibration of the transmission panel 7 that functions as a diaphragm of the panel speaker due to vibration of the vibration unit 9 made of a piezoelectric element. There is no such thing, and a reliable waterproofing can be achieved.

  In addition, the waterproof structure does not work in the vertical (vertical) direction, and the first housing 1 and the second housing 2 do not need to have more rigidity than necessary. Thinning and miniaturization can be achieved.

(Embodiment 2)
FIG. 4 shows the second embodiment. As in the first embodiment, 1 is a first housing, 2 is a second housing, 3 is packing, 4 is a liquid crystal display panel, 5 is a middle case, and 6 is A substrate, 7 is a transmission panel, 8 is a cushion, 9 is a vibration unit, 13 is a convex portion, and 23 is a concave portion.

  That is, in the second embodiment, the inner wall 24 of the first embodiment described above is not necessary, and the packing 3 integral with the convex portion 13 is press-fitted into the concave portion 23 without the inner wall 24, and then the first casing 1 and the first casing 1. The two housings 2 are united by screwing (not shown).

  Therefore, the waterproof structure of the housing of the second embodiment can provide the same effects as those of the first embodiment, and in addition, the second housing 2 can be provided to the extent that it is not necessary to provide the inner wall 24 in the recess 23. And since the thickness of the both sides of the 1st housing | casing 1 can be made small, the thickness of a housing | casing can be reduced further and it can contribute to thickness reduction and size reduction.

(Modification)
In the above embodiment, the cellular phone is used. However, the present invention is not limited to this, and electronic devices including portable electronic devices such as cameras, PDAs, notebook computers, wearable computers, calculators, and electronic dictionaries. Can be used for all.
In the embodiment, the two housings are fixed by the hook portion, but may be screwed.
Furthermore, in the embodiment, the inner wall is provided on the inner peripheral side of the recess, but the inner wall may not be provided. However, in that case, the two casings are fixed with screws.
Moreover, the thing of the structure which formed the convex part and packing integrally in the lower housing | casing, and provided the recessed part in the upper housing | casing may be sufficient.
Further, the cross-sectional shapes of the convex portions, the concave portions, and the packing are arbitrary, and it is needless to say that other specific detailed structures can be appropriately changed.

BRIEF DESCRIPTION OF THE DRAWINGS It is the schematic front view which showed the structure of Embodiment 1 of the electronic device to which this invention is applied, and showed the housing | casing of the mobile telephone. It is an expanded sectional view along the arrow AA line of FIG. It is a disassembled perspective view of the component of FIG. FIG. 3 is a cross-sectional view similar to FIG. 2, showing Embodiment 2.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 1st housing | casing 13 convex part 15 hook part 2 2nd housing | casing 23 recessed part 24 inner wall 25 engagement hole 3 packing 9 vibration source

Claims (5)

A first housing and a second housing, which are overlapped and united;
A packing structure disposed around the entire circumference between the first casing and the second casing, and a waterproof structure comprising:
The first casing is provided with a convex portion located on the inner periphery with respect to the inner peripheral surface of the second casing.
The packing is press-fitted between the convex portion and the inner peripheral surface of the second casing,
A waterproof structure for a housing, wherein the packing is attached to the convex portion.   The waterproof structure for a housing according to claim 1, wherein the packing is fixed to at least an outer peripheral surface and a front end surface of the convex portion. The second housing is at least partially provided with an inner wall that is spaced inward from the convex portion,
The waterproof structure of the casing according to claim 1 or 2, wherein the inner wall is fixed to an inner peripheral surface of the first casing.   4. The waterproof structure of the housing according to claim 1, wherein a vibration source is provided in one of the first housing and the second housing. 5.   An electronic apparatus comprising the housing having the waterproof structure according to claim 1.

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