JP2014086644A - Waterproof structure of housing for incorporating electronic component - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an easy-to-manufacture waterproof structure of a housing for incorporating an electronic component.SOLUTION: A waterproof structure of a housing for incorporating an electronic component includes a housing consisting of a first case, and a second case having a groove to be applied with an adhesive in the surface facing the first case, and an electronic component to be incorporated in the housing. The first case is provided, in the surface facing the second case, with a protrusion which comes into contact with the adhesive by intruding into the groove, when the first case and second case are attached to the surface facing the second case.

Description

  The present invention relates to a waterproof structure for a housing containing electronic components.

  Some portable electronic devices such as mobile phones, PHS, and portable music players have a waterproof function. When a mobile phone having a waterproof function is used as a housing containing an electronic device by connecting two or more cases such as a front case and a rear case, a waterproof packing (packing) is provided between the case and the case. A waterproof structure is provided between the case (see Patent Document 1).

Japanese Patent Laid-Open No. 10-284855

  Here, in the waterproof structure, a groove is formed in one case, and a waterproof packing is inserted into the groove. However, the waterproof structure in which the waterproof packing is inserted into the groove requires an operation of embedding the waterproof packing in the elongated groove, which is troublesome during manufacturing.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a waterproof structure for a housing containing an electronic component that can be easily manufactured.

  In order to solve the above-described problems and achieve the object, a waterproof structure for a housing incorporating an electronic component according to the present invention has a first case and a groove to which an adhesive is applied facing the first case. A housing formed of a second case on the surface; and an electronic component built in the housing. The first case and the second case are disposed on a surface facing the second case. And a convex portion that enters the groove and comes into contact with the adhesive.

  Here, the penetration depth of the convex portion into the groove may be a depth that allows the adhesive to come into contact with the adhesive even when the applied amount of the adhesive is the minimum amount of variation in the applied amount. preferable.

  The groove is formed between an outer wall provided in the second case and an inner wall provided on the inner side of the second case than the outer wall, and the inner wall is formed on the outer wall. Is preferably lower.

  The groove is formed between an outer wall provided in the second case and an inner wall provided inside the second case with respect to the outer wall, and the inner wall has a through hole. It is preferable to be provided.

  Further, the surface closer to the inner side of the first case of the surface of the convex portion is gradually directed toward the inner side of the first case as it approaches the surface of the first case facing the second case. It is preferable to be inclined.

  According to the waterproof structure of the housing incorporating the electronic component according to the present invention, there is an effect that it can be easily manufactured.

FIG. 1 is a perspective view illustrating a schematic configuration of the portable electronic device according to the first embodiment when viewed from the front side. FIG. 2 is an exploded perspective view illustrating a schematic configuration of the portable electronic device according to the first embodiment when viewed from the front side. FIG. 3 is an exploded perspective view of the schematic configuration of the portable electronic device shown in FIG. 2 as seen from the back side. 4 is a cross-sectional view showing a schematic configuration of a waterproof structure of a front case and a rear case of the portable electronic device shown in FIG. FIG. 5 is an enlarged cross-sectional view showing a portion IV in FIG. FIG. 6 is a cross-sectional view illustrating a schematic configuration of a waterproof structure of a front case and a rear case of the portable electronic device according to the second embodiment. FIG. 7 is a cross-sectional view illustrating a schematic configuration of the waterproof structure of the front case and the rear case of the portable electronic device according to the third embodiment. FIG. 8 is a cross-sectional view illustrating a schematic configuration of the waterproof structure of the front case and the rear case of the portable electronic device according to the fourth embodiment. FIG. 9 is a cross-sectional view illustrating a schematic configuration of the waterproof structure of the front case and the rear case of the portable electronic device according to the fifth embodiment. FIG. 10 is an exploded perspective view of the imaging module. 11 is a cross-sectional view of a joint portion between the first case and the second case of the imaging module shown in FIG. 12 is a cross-sectional view of a joint portion between the first case and the imaging window of the imaging module shown in FIG.

  Hereinafter, the present invention will be described in detail with reference to the drawings. The present invention is not limited to the following description. In addition, constituent elements in the following description include those that can be easily assumed by those skilled in the art, those that are substantially the same, and those in a so-called equivalent range. In the following, a PHS (Personal Handy-phone System) terminal will be taken as an example of a portable electronic device. However, the portable electronic device is not limited to a PHS terminal. For example, a portable phone, a PDA, a portable navigation device, a notebook computer It may be a game machine or the like.

[Embodiment 1]
A portable electronic device such as a PHS (Personal Handy-phone System) terminal will be described with reference to the drawings as an example of a waterproof structure of a housing containing an electronic component according to Embodiment 1 of the present invention. FIG. 1 is a perspective view seen from the front side showing a schematic configuration of the portable electronic device according to the first embodiment, and FIG. 2 is an exploded perspective view seen from the front side showing a schematic configuration of the portable electronic device according to the first embodiment. FIG. 3 is an exploded perspective view of the schematic configuration of the portable electronic device shown in FIG. 2 as seen from the back side. The portable electronic device 1 according to the first embodiment is a PHS terminal having a waterproof function. The portable electronic device 1 is a so-called straight-type PHS terminal including a front case 21 and a rear case 22 to which a housing 2 is attached, as shown in FIGS. 1, 2, and 3. Here, in the present invention, the longitudinal direction of the housing 2 is the length direction, the width direction of the housing 2 is the width direction, and the direction orthogonal to both the length direction and the width direction is the thickness direction. is there.

  The housing 2 is formed in a flat box shape. As shown in FIGS. 1, 2, and 3, the housing 2 is arranged on the front case 21 (corresponding to the first case) disposed on the front side of the portable electronic device 1 and on the rear side of the portable electronic device 1. The rear case 22 (corresponding to the second case) is provided. The front case 21 is made of a synthetic resin and integrally includes a frame-shaped frame-shaped portion 23 and a box-shaped box-shaped portion 24. As for the front case 21, the center part of the box-shaped part 24 is comprised with translucent synthetic resin, and the other part is comprised with the light-shielding synthetic resin. As for the front case 21, the frame-shaped part 23 and the box-shaped part 24 are arranged in the said length direction. The front case 21 has an operation unit cover 30 attached to the front side of the frame-like portion 23.

  The rear case 22 is made of synthetic resin, and integrally includes a frame-shaped frame-shaped portion 25 and a box-shaped box-shaped portion 26. The rear case 22 has a frame-like portion 25 and a box-like portion 26 arranged in the length direction. The rear case 22 has a plurality of battery covers 27 a and 27 b attached to the back side of the frame-like portion 25. In the first embodiment, two battery covers 27a and 27b are provided. The two battery covers 27 a and 27 b are attached to the rear case 22 in such a manner that they are sequentially stacked on the back surface of the frame-like portion 25 of the rear case 22. It should be noted that a waterproof structure is provided between the one battery cover 27 a that is directly superimposed on the back surface of the frame-shaped portion 25 of the rear case 22 and the frame-shaped portion 25. Thereby, the rear case 22 can suppress water from entering the space formed between the frame-shaped portion 25 and the battery cover 27a from the outside, and can make the space a waterproof space. In the waterproof structure between the frame-shaped portion 25 of the rear case 22 and the battery cover 27a, a seal member such as a packing is disposed between the frame-shaped portion 25 and the battery cover 27a.

  Further, in the housing 2, the outer edge portion of the front case 21 and the outer edge portion of the rear case 22 are engaged with each other, and a waterproof structure 3 (shown in FIG. 4) is formed therebetween. Thereby, the housing | casing 2 can suppress that water enters into the space formed between the front case 21 and the rear case 22 from the outside, and can make the said space waterproof. The waterproof structure 3 (waterproof structure) between the front case 21 and the rear case 22 will be described later. In the first embodiment, the front case 21 and the rear case 22 are connected to each other by the engagement claw 28 provided in the front case 21 engaging the hole 29 provided in the rear case 22. Attached to each other.

  Moreover, the portable electronic device 1 is provided with the base | substrate 4, the operation pad 5, the battery 6, etc. as shown in FIG.2 and FIG.3. The base 4, the operation pad 5, the battery 6 and the like are mounted on the housing 2. The base 4 controls the operation of the entire portable electronic device 1. The base 4 includes a base plate 43, a display device 41 that displays an image, an operation unit 42 that receives operations, a substrate 44 on which various electronic components are mounted, and the like. The base plate 43 fixes the display device 41, the operation unit 42, the substrate 44, and various functional components (such as a microphone, a receiver, a speaker, and a camera) necessary as a PHS terminal. The display device 41 displays various images such as a standby image and a menu image through the transparent portion at the center of the box-shaped portion 24 of the front case 21. For example, the display device 41 is a liquid crystal display (LCD: Liquid Crystal). Display), a display panel having an organic EL (Organic Electro-Luminescence) panel and the like. The operation unit 42 has various switches (not shown). The substrate 44 is a so-called printed wiring board (PWB) on which various electronic components built in the housing 2 are mounted. That is, the portable electronic device 1 includes an electronic component. The base body 4 is disposed inside the housing 2 with the operation section 42 mounted in the frame-shaped section 23 of the front case 21 and the display device 41 mounted in the box-shaped section 24 of the front case 21.

  The operation pad 5 is for receiving a user operation. The operation pad 5 includes various operation keys 51 to be operated and a waterproof sheet 52 provided with the operation keys 51. The operation pad 5 is mounted on the front case 21 with the operation key 51 exposed to the outside through a through hole 30 a provided in the operation unit cover 30. The operation key 51 corresponds to the switch of the operation unit 42 and transmits the operation to the corresponding switch of the operation unit 42. The operation key 51 is, for example, an operation key for inputting characters when creating a telephone number of a communication partner or mail, for easily selecting and determining a menu displayed on the display device 41, scrolling a screen, and the like. Including the direction and the enter key. In addition, the operation pad 5 has a waterproof sheet 52 disposed between the frame-shaped portion 23 of the front case 21 and the operation-portion cover 30, and has a waterproof structure between the frame-shaped portion 23 of the front case 21.

  The battery 6 functions as a power source for the portable electronic device 1. The battery 6 is accommodated in the frame-like portion 25 of the rear case 22 and mounted on the rear case 22. The battery 6 is covered with a battery cover 27a.

  Next, the waterproof structure 3 of the front case 21 and the rear case 22 (corresponding to a waterproof structure of a housing incorporating an electronic component) will be described with reference to the drawings. 4 is a cross-sectional view showing a schematic configuration of the waterproof structure of the front case and the rear case of the portable electronic device shown in FIG. 2, and FIG. 5 is an enlarged cross-sectional view showing a portion IV in FIG.

  The waterproof structure 3 is provided at the outer edge portions of the front case 21 and the rear case 22 that face each other. As shown in FIGS. 4 and 5, the waterproof structure 3 faces the groove 31 provided on the surface 22 a of the outer edge of the rear case 22 facing the front case 21 and the rear case 22 of the outer edge of the front case 21. And a convex portion 32 provided on the surface 21a.

  The groove 31 is provided on the outer edge of the rear case 22 over the entire circumference. The groove 31 is formed in a concave shape from the surface 22a, and the cross-sectional shape is formed in a rectangular shape or an arc shape. The groove 31 is formed between an outer wall 34 provided outside the rear case 22 and an inner wall 35 provided more inside the rear case 22 than the outer wall 34. The outer side wall 34 and the inner side wall 35 are arranged with a space therebetween, and a groove 31 is formed between them. When the front case 21 and the rear case 22 are attached to each other, the upper end surface 351 of the inner wall 35 is separated from the surface 22 a of the rear case 22 rather than the upper end surface 341 of the outer wall 34. In the first embodiment, the upper end surface 341 of the outer wall 34 coincides with the surface 22 a of the rear case 22. The separation of the upper end surface 351 of the inner wall 35 from the surface 22 a of the rear case 22 rather than the upper end surface 341 of the outer wall 34 indicates that the inner wall 35 is lower than the outer wall 34. In the first embodiment, the inner wall 35 is slightly lower than the outer wall 34. The height of the inner wall 35 is higher than half the height of the outer wall 34. An adhesive 33 is applied in the groove 31.

  The adhesive 33 is applied in the groove 31 before being cured. In the first embodiment, the adhesive 33 is discharged from a discharge port (not shown) that is relatively moved with respect to the rear case 22 by a certain amount and applied in the groove 31. Note that a certain amount discharged from the discharge port of the adhesive 33 and a tolerance of this certain amount (corresponding to a fluctuation range) are determined when the portable electronic device 1 is designed.

  The convex part 32 is provided in the outer edge part of the front case 21 over the perimeter. The convex portion 32 is formed to be convex from the surface 21a, and the cross-sectional shape is formed in a rectangular shape or an arc shape. The cross-sectional shape of the convex portion 32 is smaller than the cross-sectional shape of the groove 31. When the front case 21 and the rear case 22 are attached to each other, the convex portion 32 enters the groove 31 and contacts the adhesive 33. The penetration depth H into the groove 31 at the tip of the convex portion 32 is a lower two-dot chain line in FIG. 5 even when the application amount of the adhesive 33 into the groove 31 is less than the above-described constant value. As shown in FIG. 8, the convex portion 32 has a depth that allows contact with the adhesive 33. The penetration depth H refers to the distance from the upper end surface 341 of the outer wall 34 to the tip of the convex portion 32 when the front case 21 and the rear case 22 are attached to each other. Further, the application amount that is less than the predetermined value of the adhesive 33 is a minimum amount of fluctuation range of the application amount of the adhesive 33.

  Further, even when the amount of the adhesive 33 applied on the inside of the groove 31 exceeds the above-described constant value by the tolerance, as shown by the upper two-dot chain line in FIG. It is a size which does not exceed the upper end surface 351. Further, the amount of application that exceeds the fixed value of the adhesive 33 by the tolerance means the maximum amount of fluctuation range of the amount of application of the adhesive 33. In addition, the continuous line in FIG. 5 has shown the surface of the adhesive agent 33 when the application amount of the adhesive agent 33 is the fixed value mentioned above. 5 indicates the surface of the adhesive 33 when the application amount of the adhesive 33 is less than the tolerance described above. The upper alternate long and two short dashes line in FIG. 5 indicates the surface of the adhesive 33 when the application amount of the adhesive 33 exceeds the predetermined value by the tolerance.

  The portable electronic device 1 described above is assembled as follows. First, the base body 4 is built in the front case 21. The adhesive 33 is discharged into the groove 31 by a certain amount from the discharge port that moves relative to the rear case 22, and the adhesive 33 is applied to the groove 31. Thereafter, before the adhesive 33 is cured, the front case 21 and the rear case 22 are attached to each other so that the surfaces 21a and 22a of the outer edge portions overlap each other. When the front case 21 and the rear case 22 are attached to each other, before the adhesive 33 is cured, the convex portion 32 enters the groove 31 and contacts the adhesive 33. The convex portion 32 also enters the adhesive 33 and presses the adhesive 33 toward the inner surface of the groove 31. Thereafter, the operation pad 5 is overlaid on the frame-like portion 23 of the front case 21, and the operation portion cover 30 is attached to the front case 21. Further, the battery 6 is built in the frame-shaped portion 25 of the rear case 22, and the battery covers 27 a and 27 b are attached to the frame-shaped portion 25 of the rear case 22.

  In the waterproof structure 3, when the adhesive 33 is cured, the adhesive 33 comes into close contact with both the inner surface of the groove 31 and the surface of the convex portion 32, so that water is sealed between the front case 21 and the rear case 22. Keep on. The waterproof structure 3 suppresses water from entering the space where the adhesive 33 is formed between the front case 21 and the rear case 22 from the outside. Further, when the adhesive 33 is cured, the front case 21 and the rear case 22 are fixed.

  In the portable electronic device 1 according to the first embodiment, the convex portion 32 provided in the front case 21 is brought into contact with the adhesive 33 applied in the groove 31 of the rear case 22. The portable electronic device 1 has a waterproof structure 3 between the front case 21 and the rear case 22 by the adhesive 33 and the convex portion 32. Thereby, since the portable electronic device 1 can be assembled by applying the adhesive 33 into the groove 31 from the discharge port and attaching the front case 21 and the rear case 22, it is possible to suppress labor during manufacture. Can be manufactured easily.

  In addition, the portable electronic device 1 has the waterproof structure 3 by attaching the front case 21 and the rear case 22 before the adhesive 33 applied in the groove 31 is cured, and the adhesive 33 is cured. Furthermore, the portable electronic device 1 has a convex portion even when the penetration depth H of the convex portion 32 into the groove 31 is the minimum amount of variation in the application amount of the adhesive 33 applied in the groove 31. Reference numeral 32 denotes a depth that allows contact with the adhesive 33. Thereby, the portable electronic device 1 can suppress the formation of a gap between the adhesive 33 and the front case 21 and the rear case 22 after manufacture, and has a high waterproof function between the front case 21 and the rear case 22. Can be maintained. Therefore, the portable electronic device 1 can be easily manufactured while maintaining a high waterproof function.

[Embodiment 2]
Next, a portable electronic device according to Embodiment 2 of the present invention will be described with reference to the drawings. FIG. 6 is a cross-sectional view illustrating a schematic configuration of a waterproof structure of a front case and a rear case of the portable electronic device according to the second embodiment. In FIG. 6, the same parts as those of the first embodiment are denoted by the same reference numerals, and the description thereof is omitted. As shown in FIG. 6, in the waterproof structure 3a of the portable electronic device 1 according to the second embodiment, the height of the inner wall 35a forming the groove 31 is lower than half the height of the outer wall 34, and the inner wall 35a. Is lower than the outer wall 34. Further, in the waterproof structure 3a of the portable electronic device 1 according to the second embodiment, the protruding amount of the convex portion 32a from the surface 21a is smaller than that of the first embodiment, and the convex portion 32a is wider than the first embodiment.

  In the portable electronic device 1 according to the second embodiment, when the application amount of the adhesive 33 exceeds the predetermined amount, the adhesive 33 is attached to the front case 21 and the rear case 22 as shown in FIG. In some cases, it rides on the upper end surface 351 of the inner wall 35a.

  In the portable electronic device 1 according to the second embodiment, the inner wall 35 a is lower than the outer wall 34, and therefore, when attaching the front case 21 and the rear case 22, the surplus adhesive 33 is applied beyond the outer wall 34. First, the inner wall 35a is exceeded and the case 21 or 22 is retained. Thereby, the portable electronic device 1 can suppress the adhesive 33 from being discharged out of the cases 21 and 22 beyond the outer wall 34 and can be easily manufactured while maintaining a high waterproof function. In addition, it can suppress detracting from aesthetics.

[Embodiment 3]
Next, a portable electronic device according to Embodiment 3 of the present invention will be described with reference to the drawings. FIG. 7 is a cross-sectional view illustrating a schematic configuration of the waterproof structure of the front case and the rear case of the portable electronic device according to the third embodiment. In FIG. 7, the same parts as those in the first and second embodiments are denoted by the same reference numerals and description thereof is omitted. In the waterproof structure 3b of the portable electronic device 1 according to the third embodiment, as illustrated in FIG. 7, the inner wall 35 that forms the groove 31 is provided with a through hole 36 that penetrates the inner wall 35. A plurality of through holes 36 are provided at intervals in the longitudinal direction of the groove 31.

  In the portable electronic device 1 according to the third embodiment, the adhesive 33 applied in the groove 31 is pushed from the convex portion 32 when attaching the front case 21 and the rear case 22, as shown in FIG. In some cases, it may enter the through hole 36 provided in the inner wall 35.

  In the portable electronic device 1 according to the third embodiment, since the through hole 36 is provided in the inner side wall 35, when attaching the front case 21 and the rear case 22, the excess adhesive 33 is passed over the outer wall 34. Prior to this, it penetrates into the through hole 36 and is retained in the cases 21 and 22. Thereby, the portable electronic device 1 can suppress the adhesive 33 from being discharged out of the cases 21 and 22 beyond the outer wall 34 and can be easily manufactured while maintaining a high waterproof function. In addition, it can suppress detracting from aesthetics.

[Embodiment 4]
Next, a portable electronic device according to a fourth embodiment of the present invention will be described with reference to the drawings. FIG. 8 is a cross-sectional view illustrating a schematic configuration of the waterproof structure of the front case and the rear case of the portable electronic device according to the fourth embodiment. In FIG. 8, the same parts as those in the first to third embodiments are denoted by the same reference numerals, and description thereof is omitted. As shown in FIG. 8, the waterproof structure 3c of the portable electronic device 1 according to the fourth embodiment has an inner wall 35a whose height is lower than half the height of the outer wall 34 as in the second embodiment. 35 a is lower than the outer wall 34. In the waterproof structure 3c of the portable electronic device 1 according to the fourth embodiment, the protruding amount of the convex portion 32 from the surface 21a is the same as that of the first embodiment.

  In the portable electronic device 1 according to the fourth embodiment, when the application amount of the adhesive 33 exceeds the predetermined amount described above, the adhesive 33 is attached to the front case 21 and the rear case 22 as shown in FIG. In some cases, it rides on the upper end surface 351 of the inner wall 35a.

  In the portable electronic device 1 according to the fourth embodiment, the inner wall 35 a is lower than the outer wall 34, and therefore, when attaching the front case 21 and the rear case 22, the surplus adhesive 33 is applied more than exceeding the outer wall 34. First, the inner wall 35a is exceeded and the case 21 or 22 is retained. Thereby, the portable electronic device 1 can suppress the adhesive 33 from being discharged out of the cases 21 and 22 beyond the outer wall 34 and can be easily manufactured while maintaining a high waterproof function. In addition, it can suppress detracting from aesthetics.

[Embodiment 5]
Next, a portable electronic device according to a fifth embodiment of the present invention will be described with reference to the drawings. FIG. 9 is a cross-sectional view illustrating a schematic configuration of the waterproof structure of the front case and the rear case of the portable electronic device according to the fifth embodiment. In FIG. 9, the same parts as those in the first to fourth embodiments are denoted by the same reference numerals, and the description thereof is omitted. In the waterproof structure 3d of the portable electronic device 1 according to the fifth embodiment, the surface 321 closer to the inner side of the front case 21 of the surface of the convex portion 32b gradually goes toward the inner side of the front case 21 as it approaches the surface 21a. It is inclined to. The surface 321 of the convex portion 32b is inclined with respect to both the direction parallel to the surfaces 21a and 22a and the direction orthogonal to the surfaces 21a and 22a.

  In the portable electronic device 1 according to the fifth embodiment, when the front case 21 and the rear case 22 are attached, the adhesive 33 moves on the surface 321 as shown in FIG. Guided.

  In the portable electronic device 1 according to the fifth embodiment, the surface 321 closer to the inside of the front case 21 of the convex portion 32b is gradually inclined toward the inside of the front case 21 as it approaches the surface 21a. Thereby, when the portable electronic device 1 attaches the front case 21 and the rear case 22, the adhesive 33 is guided toward the inside of the cases 21 and 22 by the surface 321. Therefore, the portable electronic device 1 can suppress the adhesive 33 from being discharged outside the cases 21 and 22 beyond the outer wall 34, and can prevent the appearance from being impaired.

  The present invention is not limited to the above embodiment. That is, various modifications can be made without departing from the scope of the present invention.

  For example, in the above description, a portable electronic device such as a PHS (Personal Handy-phone System) terminal has been described as an example of a waterproof structure of a housing containing an electronic component. The electronic device is not limited to an electronic device. For example, an electronic device such as a mobile phone, a PDA, a portable navigation device, a notebook computer, a game machine, a video camera, a clock, an imaging module incorporating a CCD sensor or a CMOS sensor, a microphone Or an acoustic module with a built-in speaker.

  Hereinafter, the imaging module will be specifically described. FIG. 10 is an exploded perspective view of the imaging module 500. In the imaging module 500, a first case 501 and a second case 601 constitute a housing of the module. The first case 501 has a frame-like convex portion 502, and the second case 601 has a groove 602 at a position facing the convex portion 502. Further, an adhesive is applied to the groove 502, and the convex portion 502 enters the groove 602 and contacts the adhesive when the first case 501 and the second case 601 are attached. In addition, a cable 900 that collects a signal cable that transmits a signal output from the image sensor 700, a power cable that supplies power to the image sensor, and the like is pulled out from the inside of the housing while maintaining a watertight state. It is.

  By configuring the housing of the imaging module in this way, the manufacturing can be simplified as compared with the conventional technique in which the waterproof packing is fitted into the groove.

  By the way, when such an imaging module 500 is mounted on a vehicle such as an automobile, the imaging module 500 is arranged in an environment that is susceptible to vibration. However, in addition to the configuration of the present invention, the convex portion 502 is embedded in the adhesive inside the groove, whereby the fixation between the first case 501 and the second case 601 is caused in the lateral direction (first Since the case 501 and the second case 601 are strong against displacement in a direction perpendicular to the direction in which the second case 601 is stacked, as a result, the waterproofness is hardly impaired.

  The above configuration will be described in detail with reference to FIG. 11 is a cross-sectional view of a joint portion between the first case 501 and the second case 601 of the imaging module shown in FIG. For the sake of explanation, FIG. 11 shows a state immediately before the first case 501 and the second case 601 are assembled, and the first case, the 501 and the second case 601 are fixed to each other. When configuring the body, the upper surface 611a of the outer wall portion 611 and the upper surface 511a which is the surface facing the 611a of the first case 501 are in contact with each other, and the convex portion 502 is formed on the adhesive 33 applied to the groove 602. Is buried.

  The second case 601 is surrounded by an outer wall portion 611 that forms the outer surface of the housing, an inner wall portion 612 that forms the inner surface of the housing, and the outer wall portion 611 and the inner wall portion 612 at a location fixed to the first case 501. And a groove 602 at the location. The height of the outer wall portion 611 from the bottom portion 602 a of the groove portion 602 is configured to be lower than the height of the inner wall portion 612 from the bottom portion 602 a of the groove portion 602.

  That is, when the first case 501 and the second case 601 are assembled, the upper surface 611a of the outer wall portion 611 and the upper surface 511a of the first case 501 are in contact with each other as described above, but the upper surface of the inner wall portion 612. 612a and the upper surface 512a of the first case 501 are not in contact with each other, and a gap is generated.

  Therefore, by assembling the first case 501 and the second case 601, even if the adhesive 33 pushed out by the convex portion 502 being embedded in the adhesive 33 overflows from the groove 602, Since it does not overflow from the outer wall portion 611 to the outside but overflows from the inner wall portion 612 to the inside, it is possible to suppress the possibility that the appearance is damaged by the adhesive.

  Furthermore, an image sensor 700 including a lens 701 is mounted in a housing including the first case 501 and the second case 601. In addition, an imaging window 801 facing the lens 701 of the imaging device 700 is fixed to either the first case 501 or the second case 601 with an adhesive.

  For example, in the above-described imaging module 500, the imaging window 801 is attached to the housing (the first case 501 or the second case 502). In the present embodiment, the imaging window 801 is attached to the first case 501. The first case 501 has a frame-like convex portion 503 at a position where the imaging window 801 is arranged, and the imaging window 801 has a groove 802 at a position facing the convex portion 503. Further, an adhesive is applied to the groove 802, and the convex portion 503 enters the groove 802 and contacts the adhesive when the first case 501 and the second case 601 are attached.

  As described above, the imaging window 801 and the housing can be easily manufactured without using a waterproof packing by the convex portion 503, the groove 802, and the adhesive applied to the groove 802.

  Further, as described above, the imaging module 500 may be mounted on a vehicle such as an automobile. However, the fixation between the imaging unit 801 and the first case 501 is caused in the lateral direction (imaging window due to vibration). 801 and the first case 501 are resistant to displacement in a direction perpendicular to the direction in which the first case 501 is laminated), and as a result, waterproofness is hardly impaired.

  The above configuration will be described in detail with reference to FIG. FIG. 12 is a cross-sectional view of a joint portion between the first case 501 and the imaging window 801 of the imaging module shown in FIG. 12 shows a state immediately before the first case 501 and the imaging window 801 are assembled for the sake of explanation. When the imaging window 801 is fixed to the first case 501, the imaging window 801 is shown. The upper surface 811a of the outer wall portion 811 and the upper surface 511a that is the surface facing the 611a of the first case 501 are in contact with each other, and the convex portion 502 is embedded in the adhesive 33 applied to the groove 802.

  The imaging window 801 includes an outer edge portion 811 that forms an edge of the imaging window 801, an inner surface portion 812 that forms a central portion of the imaging window 801, and the outer edge portion 811 and the inner surface portion. And a groove 802 at a location surrounded by 812. The height of the outer edge portion 811 from the bottom portion 802a of the groove portion 802 is configured to be lower than the height of the inner surface portion 812 from the bottom portion 802a of the groove portion 802.

  That is, when the imaging window 801 is assembled to the first case 501, as described above, the upper surface 811 a of the outer edge portion 811 and the upper surface 811 a of the first case 501 come into contact with each other, but the upper surface 812 a of the inner surface portion 812. A gap is generated without contacting the upper surface 812a of the first case 501.

  Accordingly, even when the imaging window 801 is assembled in the first case 501 and the adhesive 33 pushed out by the convex portion 503 being embedded in the adhesive 33 overflows from the groove 802, the outer edge Since it does not overflow from the portion 811 to the outside but overflows from the inner surface portion 812 to the inside, it is possible to suppress the possibility of the appearance being damaged by the adhesive.

1 portable electronic device 2 housing 3 waterproof structure (waterproof structure of housing containing electronic components)
21 Front case (first case)
22 Rear case (second case)
21a, 22a Surface 31, 602 Groove 32, 502 Protruding part 33 Adhesive 34 Outer side wall 35 Inner side wall 36 Through hole 321 Inner surface 501 First case 601 Second case H Intrusion depth

Claims (5)

A housing comprising a first case and a second case having a groove to which an adhesive is applied on a surface facing the first case;
An electronic component built in the housing,
The first case has a convex portion that enters the groove and contacts the adhesive when the first case and the second case are attached to a surface facing the second case. The waterproof structure of the housing with the built-in electronic components.   The depth of penetration of the convex portion into the groove is a depth that allows the adhesive to contact the adhesive even when the amount of the adhesive applied is the minimum amount of variation in the amount of application. The waterproof structure of the housing | casing which incorporates the electronic component of Claim 1. The groove is formed between an outer wall provided in the second case and an inner wall provided on the inner side of the second case than the outer wall,
The waterproof structure for a housing containing an electronic component according to claim 1, wherein the inner wall is lower than the outer wall. The groove is formed between an outer wall provided in the second case and an inner wall provided on the inner side of the second case than the outer wall,
The waterproof structure for a housing containing an electronic component according to claim 1, wherein the inner wall is provided with a through hole.   Of the surface of the convex portion, the surface closer to the inner side of the first case gradually inclines toward the inner side of the first case as it approaches the surface of the first case facing the second case. The waterproof structure of the housing | casing which incorporates the electronic component as described in any one of Claim 1 to 4 characterized by the above-mentioned.

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