JP5679208B2 - Waterproof cover and electronic device using the same - Google Patents

Description

  The present invention relates to a waterproof cover and an electronic device using the same.

  Recently, the demand for highly waterproof electronic devices (for example, mobile phones) is gradually increasing. In order to improve the waterproofness of electronic equipment, it is necessary to improve the sealing performance around the insertion slot for precision parts and optical parts, as well as the part where batteries, shim cards or memory disks are inserted and removed. Taking the waterproof structure of the battery storage part that stores the battery as an example, the tray-shaped waterproof part that achieves waterproofing at the outer periphery of the opening of the battery storage part is separated from the inner surface of the resin battery cover by injection molding or the like. The outer peripheral part of the waterproof part is made with silicone elastomer and the like, while a groove-like fitting part is formed on the outer periphery of the opening surface of the battery housing part, and the outer edge part of the waterproof part is pressed into the fitting part. A configuration that realizes waterproofing (conventional configuration 1) is known. In addition, as a similar structure, the battery lid and the outer edge of the waterproof part are integrally formed to improve the waterproofness between the battery cover and the electronic device body, and at the same time, by eliminating the adhesive thickness, A configuration for reducing the thickness (conventional configuration 2) is also known (see, for example, Patent Document 1).

Japanese Patent No. 4424445

  However, the above known battery lid has the following problems. First, in the case of the conventional configuration 1, since the waterproof part is formed by injection molding or the like, it is difficult to reduce the thickness of the bottom plate connected to the outer edge part from the thickness limit in molding. Further, since an adhesive layer such as an adhesive or a double-sided tape is required to attach the battery lid and the waterproof portion, the total thickness of the electronic device with the battery lid attached is increased. Therefore, the conventional configuration 1 hinders the thickness reduction of the electronic device. On the other hand, when the battery lid and the outer edge portion of the waterproof part are integrally formed as in the conventional configuration 2, the bottom plate and the adhesive layer of the waterproof part are not necessary, and the electronic apparatus is not hindered in thickness reduction. However, a minute unevenness or distortion occurs on the outer surface of the battery lid, which causes another problem that the appearance of the battery lid is impaired. Specifically, a deformation region such as minute unevenness or distortion along the shape of the annular waterproof portion is generated outside the battery lid. One of the reasons for this is that in the process of setting the battery cover with the waterproof part integrated in the mold and fixing the elastomer to the surface of the outer edge of the waterproof part, In order to apply pressure to the base of the outer edge and heat the mold for the purpose of solidifying the elastomer, the vicinity of the base is deformed. As a method of reducing the deformation region, a method of lowering the pressure at the time of mold clamping is conceivable. However, when the pressure is lowered, the liquid composition for forming the elastomer flows out from the original formation location, and the burr Generation of bubbles in the elastomer or sink on the bottom plate of the battery lid increases.

  An object of the present invention is to solve the above-described problems, that is, to realize a waterproof cover that achieves both a reduction in thickness of an electronic device and a good appearance of a lid member, and an electronic device including the same.

  In order to achieve the above object, an embodiment of the present invention provides a waterproof cover that can be attached to and exposed to an opening of an electronic device main body or a waterproof component that is attached to the electronic device main body. A cover body that covers an opening or a part of the electronic device body, and a waterproof member that is separate from the cover body and is fixed to the inside of the cover body, the waterproof member having a closed-loop frame, A sheet that covers the opening surface of the frame body on the cover body side and is fixed to the frame body, and an elastic sealing material that is softer than the frame body and covers at least the end opposite to the sheet of the frame body and adheres to the frame body And a waterproof cover.

  Another embodiment of the present invention may be a waterproof cover in which the elastic sealing material reaches the sheet from the end of the frame and fixes the frame and the sheet.

  Another embodiment of the present invention may be a waterproof cover including an adhesive layer for fixing the frame and the sheet at a contact portion between the frame and the sheet.

  Another embodiment of the present invention may be a waterproof cover in which an elastic sealing material is interposed at a contact portion between the frame and the sheet, and the frame and the sheet are bonded.

  Another embodiment of the present invention may be a waterproof cover provided with ribs protruding in the width direction of the end of the frame on at least the outer surface of the end of the frame in the elastic sealing material.

Another embodiment of the present invention may be a waterproof cover in which the sheet and the inside of the cover main body are fixed with a waterproof double-sided tape interposed therebetween.

  One embodiment of the present invention is a waterproof cover provided with a wide portion on the side of the frame body that is fixed to the cover body of the frame body, and has a wider width on the side that is fixed to the cover body than the width of the electronic device body side. May be.

  One embodiment of the present invention is an electronic device including any one of the waterproof covers described above.

  ADVANTAGE OF THE INVENTION According to this invention, the waterproof cover which balances the thinning of an electronic device and the favorable external appearance of a cover member, and an electronic device provided with the same are realizable.

FIG. 1 is a partially exploded perspective view of an electronic apparatus according to the first embodiment of the present invention. FIG. 2 is an exploded perspective view of the waterproof cover shown in FIG. 1 as seen from the side facing the electronic device main body after being disassembled into two components. FIG. 3 is a perspective view of the waterproof cover in a state where the constituent members shown in FIG. 2 are bonded to each other as viewed from the side facing the electronic device main body. FIG. 4 shows a cross-sectional view of the waterproof cover shown in FIG. FIG. 5 shows an enlarged view of the waterproof member shown in FIG. 4 and an enlarged view of a part B thereof. FIG. 6 is a partial cross-sectional view of the vicinity of the frame in a state where the frame and the sheet shown in FIG. 5 are set in a mold for forming an elastic sealing material. FIG. 7 shows a cross-sectional view of the waterproof member constituting the waterproof cover according to the second embodiment, the same view as FIG. FIG. 8 shows a cross-sectional view of the waterproof member constituting the waterproof cover according to the third embodiment, the same view as FIG. FIG. 9 shows a cross-sectional view of the waterproof member constituting the waterproof cover according to the fourth embodiment, the same view as FIG. FIG. 10 shows a state in which the waterproof member constituting the waterproof cover according to the fifth embodiment is viewed from the inside. 11 shows an FF line cross-sectional view of the waterproof member shown in FIG. 10 and an enlarged cross-sectional view of a part G thereof.

  Next, embodiments of the waterproof cover of the present invention and an electronic apparatus using the same will be described with reference to the drawings. In each of the following embodiments, an example of a protective cover for an electronic device main body to be attached to the back surface of the electronic device main body and a battery lid will be described as an example of a waterproof cover. As long as waterproofing is realized, the present invention can be applied to other cover members such as a component having a function of only a battery cover.

<First embodiment>
1. Configuration of Waterproof Cover and Electronic Device FIG. 1 is a partially exploded perspective view of an electronic device according to the first embodiment of the present invention.

  The electronic device 1 according to the first embodiment includes a waterproof cover 2 and an electronic device body 3. The waterproof cover 2 has a configuration that can be attached to the electronic device body 3 so as to cover and expose an opening that leads to the inside of the electronic device body 3 or a waterproof part that is attached to the electronic device body 3. Suitable examples include a battery housing portion in an opening communicating with the inside of the electronic device main body 3, and a memory disk or the like as a waterproof component attached to the electronic device main body 3, respectively. In the first embodiment, the waterproof cover 2 is configured to be attachable to the back surface of the electronic device main body 3. On the other hand, the electronic device main body 3 includes a battery storage unit 4. The battery housing part 4 is formed by opening the back surface of the electronic device main body 3 so that the battery 5 can be attached and detached. The electronic device main body 3 includes a groove 6 that is recessed in the inner direction of the electronic device main body 3 in a closed loop shape on the outer periphery of the battery housing portion 4. Moreover, the electronic device main body 3 includes a step end surface 7 that is recessed inward from the back surface on the outer periphery. The step end surface 7 is configured in a position and shape facing the end surface on the opening side of the waterproof cover 2.

  FIG. 2 is an exploded perspective view of the waterproof cover shown in FIG. 1 as seen from the side facing the electronic device main body after being disassembled into two components. FIG. 3 is a perspective view of the waterproof cover in a state where the constituent members shown in FIG. 2 are bonded to each other as viewed from the side facing the electronic device main body.

  The waterproof cover 2 is fixed to a cover main body 8 that covers the battery housing portion 4 of the electronic device main body 3 and a side (referred to as the inside) that is separate from the cover main body 8 and faces the electronic device main body 3 of the cover main body 8. The waterproof member 10 is provided. The cover body 8 can be preferably manufactured from resin, metal, ceramics or glass. When the cover body 8 is made of resin, the resin may be polycarbonate (PC), polyamide (PA), polyethylene terephthalate (PET), polybutylene terephthalate (PBT), acrylonitrile / butadiene / styrene copolymer (ABS) resin, or the like. It can be used suitably. An inorganic filler or an organic filler may be dispersed in the cover body 8.

  FIG. 4 shows a cross-sectional view of the waterproof cover shown in FIG. FIG. 5 shows an enlarged view of the waterproof member shown in FIG. 4 and an enlarged view of a part B thereof.

  The waterproof member 10 can be suitably fixed to the entire inner surface of the cover body 8 via the adhesive layer 9. The adhesive layer 9 may be any layer having an adhesive function, such as an adhesive layer, an adhesive ink layer, and a double-sided tape. However, a silicone resin adhesive layer is used on both sides of a resin film such as an acrylic resin. A waterproof double-sided tape provided as can be suitably exemplified. The waterproof member 10 includes a closed-loop frame 11, a sheet 12 that covers the opening surface of the frame 11 on the cover body 8 side and is fixed to the frame 11, and is softer than the frame 11. And an elastic sealing material 13 that covers at least the end opposite to the sheet 12 and adheres to the frame 11. In the first embodiment, the frame body 11 has a form that can be inserted into the groove 6 formed in the electronic device main body 3, and is a substantially rectangular frame body. In the case where the outer shape of the groove 6 is a circle, an ellipse, a triangle, or a polygon that is a pentagon or more, the outer shape of the frame 11 is preferably a shape corresponding to the outer shape of the groove 6.

  The frame body 11 and the sheet 12 can be suitably configured from the same type of material as the cover body 8. The elastic sealing material 13 can be suitably manufactured from a thermoplastic elastomer, a thermosetting elastomer, natural rubber or the like, and in particular, a silicone elastomer represented by silicone rubber which is a kind of thermosetting elastomer can be preferably used. . Moreover, when manufacturing the elastic sealing material 13 with a thermoplastic elastomer, a styrene-type elastomer, an olefin-type elastomer, and a urethane-type elastomer can be used suitably, for example. An inorganic filler or an organic filler may be dispersed in the elastic sealing material 13.

  In the first embodiment, the elastic sealing material 13 exposes the end surface of one end portion of the frame body 11, but the frame body 11 in the sheet 12 from both side surfaces of the inner end surface and the outer end surface of the frame body 11. Covers the surrounding area. The elastic sealing material 13 that covers the outer end surface and the inner end surface of the frame body 11 fills the space between the groove 6 and the frame body 11, and contributes to waterproofing of the battery housing portion 4 located inside from the groove 6. To do. In addition, the elastic seal material 13 preferably includes ribs 14 that protrude outward and inward in the width direction of the frame 11 on the outer surface of the end portion and the inner surface of the end portion of the frame 11, respectively. The rib 14 effectively contributes to waterproofing on the inner surface of the groove 6. The frame body 11 and the sheet 12 are fixed by an elastic sealing material 13 that covers the surface of the frame body 11 without interposing any adhesive layer at the contact portion. For this reason, the waterproof member 10 can be configured to be thinner. Further, since the frame body 11 is fixed on the inner side by the width w from the side end surface of the sheet 12, the elastic sealing material 13 can be stored on the sheet 12 outside the frame body 11. Therefore, the frame 11 and the sheet 12 can be firmly fixed without extending the elastic sealing material 13 to the side end surface or the back surface of the sheet 12. In particular, there is an advantage that the waterproof member 10 can be made thinner by not extending the elastic sealing material 13 to the back surface of the sheet 12.

  Conventionally, when a resin tray is molded, a sealing member is attached to the protruding surface of the tray to form a waterproof member, and the waterproof member is fixed to the cover body 8 via the adhesive layer 9, the tray Since the thickness of the bottom plate portion has a limitation in molding, it can only be reduced to 0.4 mm at the thinnest. Similarly, even if the thickness of the cover body 8 (thickness t1 in FIG. 4) is the thinnest and 0.4 mm in thickness, the adhesive layer 9 of about 0.05 mm is added to the tray from the outer surface of the cover body 8. It is the limit to reduce the total thickness up to the inner surface of the sheet to 0.85 mm (the total of the cover body 8 thickness 0.4 mm + the adhesive layer 9 thickness 0.05 mm + the tray bottom plate thickness 0.4 mm). . On the other hand, in the first embodiment, since the thickness of the sheet 12 (thickness t2 in FIG. 5) can be reduced to about 0.15 mm, even if the adhesive layer 9 of 0.05 mm exists, the cover is covered. The total thickness from the outer surface of the main body 8 to the inner surface of the sheet 12 of the waterproof member 10 is 0.6 mm (the total of the cover main body 8 thickness 0.4 mm + adhesive layer 9 thickness 0.05 mm + sheet 12 thickness 0.15 mm). ). For this reason, even if the waterproof member 10 is separated from the cover main body 8, the electronic device 1 can be thinned. In addition, since the adhesive layer is not interposed at the contact portion between the frame body 11 and the sheet 12, the height of the frame body 11 can be prevented from excessively projecting toward the electronic device main body 3 side. For this reason, thickness reduction of the electronic device 1 can be promoted. Further, since the cover body 8 and the frame body 11 are not integrally formed, the cover body 8 is not subjected to a thermal or pressure load on the cover body 8 side in the step of attaching the elastic sealing material 13 to the frame body 11. There is an advantage that the external appearance of the main body 8 is not impaired.

2. Manufacturing method of waterproof cover The above-mentioned waterproof cover 2 can be manufactured in the following manner, for example. Hereinafter, an example in which PC resin is used as the material of the cover body 8 and the frame 11, PET resin is used as the material of the sheet 12, and silicone elastomer is used as the material of the elastic seal material 13 will be described. First, the cover main body 8 and the frame body 11 are molded by separate molds using PC resin. As the molding method, since the PC resin is a thermoplastic resin, injection molding in which a molten PC resin is injected into a mold and molded can be suitably used. As another molding method, PC resin in a softened state may be set in a mold, and vacuum molding, pressure molding, or vacuum / pressure molding may be performed. After the frame 11 is molded, the sheet 12 and the frame 11 cut into a desired size are set in another mold.

  FIG. 6 is a partial cross-sectional view of the vicinity of the frame in a state where the frame and the sheet shown in FIG. 5 are set in a mold for forming an elastic sealing material.

  In the first embodiment, the mold for molding the elastic sealing material 13 is composed of a first mold 15, a second mold 16, and a third mold 17. However, the mold for molding the elastic sealing material 13 is not limited to the configuration of these three molds, and may be configured of two or four or more molds. The gaps V1 and V2 between the space formed by the first mold 15, the second mold 16, and the third mold 17 and the frame body 11 and the sheet 12 set in the space include the elastic sealing material 13 It is a region to be formed and exists on the outside and inside of the frame body 11 respectively. Since the second mold 16 and the third mold 17 are in contact with the end surface of the end of the frame 11 and pressed toward the sheet 12 in a state where the mold is clamped, the frame 11 and the sheet 12 can reduce the risk of moving in the mold. In this state, the unvulcanized silicone elastomer composition is supplied in the direction of the arrow in FIG. 6 from the elastomer supply holes 16a and 17a formed in the second mold 16 and the third mold 17, respectively. The first mold 15, the second mold 16, and the third mold 17 are heated to cure the silicone elastomer composition. Finally, the first mold 15, the second mold 16, and the third mold 17 are opened, and the waterproof member 10 in which the elastic sealing material 13, the frame body 11, and the sheet 12 are integrated is taken out. The above-described manufacturing method is only an example, and can also be applied to manufacturing other embodiments described later. The subsequent embodiments can also be manufactured by the same manufacturing method as described above.

  As described above, the waterproof member 10 that is separate from the cover main body 8 and is fixed to the inside of the cover main body 8 is provided. The waterproof member 10 includes a closed-loop frame 11 and the cover body 8 side of the frame 11. A sheet 12 that covers the opening surface of the frame 11 and is fixed to the frame 11, and an elastic sealing material that is softer than the frame 11 and covers at least the end of the frame 11 opposite to the sheet 12 and adheres to the frame 11 13, the electronic device 1 can be made thin and the lid member can have a good appearance. Further, the cover main body 8 and the waterproof member 10 are not integrated, and the cover main body 8 is molded separately, so that the cover main body 8 has a non-uniform shrinkage amount in a plane due to the presence of the waterproof member 10. The risk of contraction. When uniform shrinkage is realized, the positional deviation between the elastic seal member 13 attached to the tip of the waterproof member 10 and the groove 6 on the electronic device main body 3 side where the elastic seal member 13 is inserted can be reduced, thereby realizing high waterproofness. This is a remarkable effect particularly when the waterproof member 10 exists at a position off the center of the cover body 8 on the plane. Further, by providing the waterproof member 10 with the frame 11 so that only the elastic sealing material 13 is inserted into the groove 6, the elastic sealing material 13 can be easily inserted into the groove 6. This action and effect is the same in other embodiments described below.

<Second embodiment>
Next, a waterproof cover according to a second embodiment of the present invention and an electronic device using the same will be described. Note that, in the second embodiment, the same reference numerals are given to configurations common to the above-described embodiments, and description thereof is omitted.

  FIG. 7 shows a cross-sectional view of the waterproof member constituting the waterproof cover according to the second embodiment, the same view as FIG.

  As in the first embodiment, the waterproof member 10a constituting the waterproof cover 2 according to the second embodiment includes a closed loop frame 11 and a frame 11 that covers the opening surface of the frame 11 on the cover body 8 side. A sheet 12 to be fixed, and an elastic seal material 13 that is softer than the frame 11 and covers at least the end of the frame 11 opposite to the sheet 12 and adheres to the frame 11. The elastic sealing material 13 exposes one end portion front end surface of the frame body 11, but covers from both side surfaces of the inner end surface and the outer end surface of the frame body 11 to the periphery in contact with the frame body 11 in the sheet 12. ing. The elastic sealing material 13 includes ribs 14 that protrude outward and inward in the width direction of the frame body 11 on the outer end surface and the inner inner surface of the frame body 11, respectively.

  As shown in the enlarged view of part C in FIG. 7, the frame 11 and the sheet 12 are fixed to each other in contact with each other through an adhesive layer 19. The adhesive layer 19 can be formed of the same type of layer as the adhesive layer 9. The adhesive layer 19 may be continuously arranged along the closed loop of the frame body 11 or may be intermittently interposed between the frame body 11 and the sheet 12. When the adhesive layer 19 is intermittently interposed between the frame body 11 and the sheet 12, the elastic sealing material 13 is present in the gap between the adhesive layers 19, and the elastic sealing material 13 serves as the inner side surface and the outer side surface of the frame body 11. You may make it connect. By providing the adhesive layer 19, the sheet 12 and the frame body 11 can be more reliably fixed in the step of attaching the elastic sealing material 13 to the frame body 11, and the positional deviation between the both 11 and 12 is less likely to occur. In particular, when the elastic sealing material 13 is attached to the end surface of the end of the frame 11, it is difficult to press the frame 11 against the sheet 12 by clamping between the members constituting the mold. This effectively contributes to prevention of the deviation of 11 and 12. The thickness t3 of the adhesive layer 19 is not particularly limited, but is desirably as thin as possible because the waterproof member 10a needs to be as thin as possible. The thickness t3 of the adhesive layer 19 can be set to, for example, 0.03 to 0.1 mm in consideration of the thickness limit in manufacturing.

  Moreover, it can replace with the structure shown in FIG. 7, and the structure which the elastic sealing material 13 adheres only to the frame 11 and does not adhere to the sheet | seat 12 can also be employ | adopted. This is because the adhesive layer 19 has a function of fixing the frame 11 and the sheet 12, and therefore it is not always necessary to fix the both 11 and 12 with the elastic sealing material 13. However, the frame 11 is a portion that repeats attachment and detachment in the groove 6 of the electronic device main body 3 and receives a large force. Therefore, it is preferable that the frame 11 is firmly fixed to the sheet 12. Therefore, it is preferable to fix the frame 11 and the sheet 12 also by the elastic sealing material 13. In addition, the waterproof member 10a which concerns on 2nd embodiment is the waterproof member 10 which concerns on 1st embodiment except the point which sets the frame 11 and the sheet | seat 12 in the state fixed through the contact bonding layer 19. FIG. It can be manufactured by the same method.

<Third embodiment>
Next, a waterproof cover according to a third embodiment of the present invention and an electronic device using the same will be described. Note that, in the third embodiment, the same reference numerals are given to configurations common to the above-described embodiments, and description thereof is omitted.

  FIG. 8 shows a cross-sectional view of the waterproof member constituting the waterproof cover according to the third embodiment, the same view as FIG.

  The waterproof member 10b constituting the waterproof cover 2 according to the third embodiment includes a closed loop frame 11a, a sheet 12 that covers the opening surface of the frame 11a on the cover body 8 side and is fixed to the frame 11a, And an elastic sealing material 13 that is softer than the frame 11a and covers at least the end of the frame 11a opposite to the sheet 12 and adheres to the frame 11a. The elastic sealing material 13 exposes the tip end surface of one end of the frame 11a, but covers from the both sides of the end inner surface and end outer surface of the frame 11a to the periphery in contact with the frame 11a in the sheet 12. ing. Further, the elastic sealing material 13 includes ribs 14 protruding outward and inward in the width direction of the frame 11a on the end outer surface and the end inner surface of the frame 11a.

  As shown in the enlarged view of part D of FIG. 8, the frame 11 a is provided with a protruding portion 20 having a width smaller than the width of the end surface on the end surface of the closed loop side on the cover body 8 side. The protrusion 20 is intermittently formed along the closed loop of the frame 11a. On the other hand, the sheet 12 includes a through hole 20a at a position and size where the protruding portion 20 can be inserted. For this reason, the frame 11a and the sheet 12 are fixed by fitting the protruding portion 20 on the frame 11a side and the through hole 20a on the sheet 12 side. Such a fitting configuration can be used in place of the adhesive layer 19 described in the second embodiment, but the adhesive layer 19 can also be interposed between the frame 11 a and the sheet 12. Further, without completely pushing the protruding portion 20 into the through hole 20a, a gap is formed between the end surface of the frame 11a and the sheet 12, and the elastic sealing material 13 is present in the gap, and the elastic sealing material 13 is attached to the frame. You may make it connect the inner side and the outer side of the body 11a. By providing the protruding portion 20 and the through hole 20a, the sheet 12 and the frame body 11a can be more reliably fixed in the step of attaching the elastic sealing material 13 to the frame body 11a, and the positional deviation between the both 11a and 12 hardly occurs. Become. In particular, when the elastic sealing material 13 is attached to the end surface of the end of the frame 11a, it is difficult to press the frame 11a against the sheet 12 by clamping between the members constituting the mold. The hole 20a effectively contributes to prevention of deviation between the both 11a and 12. The length of the protrusion 20 is preferably equal to or shorter than the thickness of the sheet 12. This is because if the protrusion 20 protrudes to the back side of the sheet 12, it becomes an obstacle when the waterproof member 10 b is fixed to the cover body 8.

  Moreover, it can replace with the structure shown in FIG. 8, and the structure which the elastic sealing material 13 adheres only to the frame 11a, and does not adhere to the sheet | seat 12 can also be employ | adopted. This is because the protruding portion 20 and the through-hole 20a have a function of fixing the frame 11a and the sheet 12, and therefore it is not always necessary to fix the both 11a and 12 with the elastic seal material 13. However, for the same reason as in the second embodiment, it is preferable to fix the frame 11a and the sheet 12 also by the elastic sealing material 13. The waterproof member 10b according to the third embodiment is the same as the waterproof member 10 according to the first embodiment, except that the frame 11a and the sheet 12 are set in a mold while being fitted and fixed. It can manufacture by the method of.

<Fourth embodiment>
Next, a waterproof cover and an electronic device using the same according to a fourth embodiment of the present invention will be described. Note that in the fourth embodiment, structures that are the same as those in the above-described embodiments are given the same reference numerals, and descriptions thereof will be omitted.

  FIG. 9 shows a cross-sectional view of the waterproof member constituting the waterproof cover according to the fourth embodiment, the same view as FIG.

  The waterproof member 10c constituting the waterproof cover 2 according to the fourth embodiment includes a closed loop-shaped frame body 11, a sheet 12 that covers the opening surface of the frame body 11 on the cover body 8 side and is fixed to the frame body 11, And an elastic sealing material 13 that is softer than the frame 11 and covers at least the end of the frame 11 opposite to the sheet 12 and adheres to the frame 11. As shown in the enlarged view of part E of FIG. 9, the elastic sealing material 13 exposes the end surface of one end portion of the frame body 11, while the inner end surface, the outer end surface, and the frame body of the frame body 11. 11 and the inner region 21 surrounded by the frame 11 on the sheet 12. The elastic sealing material 13 includes ribs 14 that protrude outward and inward in the width direction of the frame body 11 on the outer side surface and the inner side surface of the frame body 11, respectively. The thickness t4 of the inner region 21 of the elastic sealing material 13 is not particularly limited, but it is desirable that the thickness be as thin as possible because it is necessary to make the waterproof member 10c as thin as possible. The thickness t4 of the inner region 21 can be set to 0.07 to 0.20 mm, for example, in consideration of the manufacturing thickness limit.

  The frame 11 is fixed on the sheet 12 with an elastic seal material 13 interposed between the frame 11 and the sheet 12. For this reason, an adhesive layer other than the elastic sealing material 13 is not necessarily required between the frame 11 and the sheet 12. Further, the elastic sealing material 13 is intermittently present along the closed-loop end surface of the frame 11 in addition to the configuration existing between the frame 11 and the sheet 12 in the entire length of the closed-loop end surface of the frame 11. You may do it. For example, a protruding portion is intermittently formed on the end surface of the closed loop shape of the frame 11, the elastic sealing material 13 is present between the protruding portions, and the protruding portion of the frame 11 is brought into contact with the sheet 12. Also good. Providing the projecting portion makes it possible to press the frame 11 against the sheet 12 by clamping between the members constituting the mold, and effectively contributes to preventing the shift between the two members 11 and 12. Furthermore, an adhesive layer may be interposed only between the protrusion and the sheet 12, and the elastic sealing material 13 may be interposed between the protrusions. In addition, the waterproof member 10c which concerns on 4th embodiment can be manufactured by the method similar to the waterproof member 10 which concerns on 1st embodiment.

<Fifth embodiment>
Next, a waterproof cover and an electronic apparatus using the same according to a fifth embodiment of the present invention will be described. Note that in the fifth embodiment, identical symbols are assigned to configurations common to the previous embodiments and descriptions thereof are omitted.

  FIG. 10 shows a state in which the waterproof member constituting the waterproof cover according to the fifth embodiment is viewed from the inside. 11 shows an FF line cross-sectional view of the waterproof member shown in FIG. 10 and an enlarged cross-sectional view of a part G thereof.

  The waterproof member 10d constituting the waterproof cover 2 according to the fifth embodiment includes a closed-loop frame 11b, a sheet 12 that covers the opening surface of the frame 11b on the cover body 8 side and is fixed to the frame 11b, And an elastic sealing material 13 that is softer than the frame 11b and covers at least the end of the frame 11b opposite to the sheet 12 and adheres to the frame 11b. As shown in the enlarged view of part G of FIG. 11, the elastic sealing material 13 exposes one end portion front end surface of the frame 11b, while the end inner surface, end outer surface, and sheet of the frame 11b. 12 covers the inner region 21 surrounded by the frame 11b on the upper side. The elastic sealing material 13 includes ribs 14 that protrude outward in the width direction of the frame 11 on the outer surface of the end of the frame 11b.

  The frame 11b includes a plurality of wide portions 30 that protrude toward the inner opening side. Specifically, three wide portions 30 are provided on each side of the frame 11b. The wide portion 30 is a portion in which the width L2 on the side fixed to the cover main body 8 is wider than the width L1 on the electronic device main body 3 side, and is provided on the side fixed to the cover main body 8. The elastic sealing material 13 covers the frame 11b from above the wide portion 30, and forms a step 22 inside the opening surface of the frame 11b. The wide portion 30 may not be provided on the frame 11b so as to form a step as long as the relationship of L1 <L2 is maintained. For example, the electronic device main body 3 side or the electronic device main body 3 of the frame 11b May be formed gradually wider from a position approaching the cover body 8 by a predetermined distance. By forming the wide portion 30, it is possible to effectively prevent the situation where the frame body 11 b falls down inside. The elastic sealing material 13 does not include the inner region 21 and is formed so as to extend from both side surfaces of the frame 11b to the vicinity of the contact portion with the frame 11b on the sheet 12 as in the first embodiment. May be. Further, the elastic sealing material 13 may be formed so as to adhere only to the frame 11b. In addition, 10 d of waterproof members which concern on 5th embodiment can be manufactured by the method similar to the waterproof member 10 which concerns on 1st embodiment.

<Other embodiments>
The preferred embodiments of the present invention have been described above. However, the present invention is not limited to the various embodiments described above, and can be modified in the forms exemplified below.

  For example, although the above-described waterproof cover 2 is configured to be able to cover and expose the battery housing portion 4, an opening other than the battery housing portion 4 or a component that requires waterproofing such as a memory disk or a CPU may be waterproofed. . The rib 14 is not an essential part of the elastic sealing material 13, but is a suitable part for effectively waterproofing at the side surface of the groove 6. The rib 14 can be formed on the outer surface, the inner surface, or both side surfaces of the frame bodies 11, 11a, 11b, and is preferably formed to include at least the outer surface. This is because it is preferable to waterproof the battery housing 4 as much as possible. Further, the waterproof double-sided tape can be used for bonding the frame bodies 11, 11 a, 11 b and the sheet 12 in addition to the adhesive layer 9.

  The plurality of configurations included in each of the above-described embodiments can be arbitrarily combined with each other. For example, (a) a configuration in which the elastic sealing material 13 is continuously formed from the side surfaces of the frames 11, 11a, 11b to the sheet 12, or a configuration in which only the frames 11, 11a, 11b are formed; A configuration in which the adhesive layer 19 is interposed between the frame 11 and the sheet 12 or a configuration in which the adhesive layer 19 is not interposed; and (c) a configuration in which the elastic sealing material 13 exists between the frame 11 and the sheet 12 or A configuration that does not exist, (d) a configuration in which the end seals of the end portions of the frames 11, 11a, and 11b are not covered with or covered with the elastic seal material 13, and (e) a configuration in which the protrusions 20 are provided on the frame 11a. A configuration in which the wide portion 30 is formed in the frame 11b or a configuration in which the wide portion 30 is not formed may be arbitrarily combined.

  The waterproof cover 2 and the electronic device 1 including the same can be applied to a wide range of electronic devices other than mobile phone devices and other communication devices. For example, if waterproofing is required, wireless communication with the main body of the fixed phone device is possible. It can also be applied to remote handsets that can be used, remote controllers used in home audio equipment, and electric vehicles equipped with batteries.

  The present invention can be used for waterproof electronic devices.

DESCRIPTION OF SYMBOLS 1 Electronic device 2 Waterproof cover 3 Electronic device main body 4 Battery storage part (an example of opening part)
8 Cover body 9 Adhesive layer (For example, waterproof double-sided tape)
10, 10a, 10b, 10c, 10d Waterproof member 11, 11a, 11b Frame 12 Sheet 13 Elastic seal material 14 Rib 19 Adhesive layer 30 Wide part

Claims (8)

A waterproof cover that can be attached to and exposed to an opening that leads to the inside of the electronic device body or a waterproof part that is attached to the electronic device body.
A cover body that covers the opening or the component of the electronic device body;
A waterproof member that is separate from the cover body and is fixed to the inside of the cover body;
With
The waterproof member is
A closed loop frame,
A sheet that covers the opening surface of the frame body on the cover body side and is fixed to the frame body;
An elastic sealing material that is softer than the frame and covers at least the end of the frame opposite to the sheet and adheres to the frame;
The waterproof cover characterized by having.   The waterproof cover according to claim 1, wherein the elastic sealing material reaches the sheet from the end of the frame and fixes the frame and the sheet.   The waterproof cover according to claim 1, further comprising an adhesive layer for fixing the frame and the sheet at a contact portion between the frame and the sheet.   4. The elastic sealing material according to any one of claims 1 to 3, wherein the elastic sealing material is interposed at a contact portion between the frame and the sheet, and bonds the frame and the sheet. The waterproof cover described.   The said elastic sealing material is equipped with the rib which protrudes in the width direction of the said edge part at least in the outer surface of the said edge part of the said frame, The Claim 1 characterized by the above-mentioned. Waterproof cover. The waterproof cover according to any one of claims 1 to 5, wherein the sheet and the inner side of the cover main body are fixed with a waterproof double-sided tape interposed therebetween. .   The said frame body is equipped with the wide part which made the width | variety of the side fixed to the said cover main body wider than the width | variety of the said electronic device main body side at the side fixed to the said cover main body. The waterproof cover according to any one of 6.   An electronic apparatus comprising the waterproof cover according to any one of claims 1 to 7.

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