JP2012074335A - Battery housing cover and electronic apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce excessive load on the constituent members of an electronic apparatus and also provide high waterproof performance by adequately coping with even a varying clearance between the main body and the battery housing cover of an electronic apparatus.SOLUTION: The present invention relates to a battery housing cover 20 which is fixed oppositely to a battery housing part which accommodates a battery in an electronic apparatus. The battery housing cover 20 is disposed so as to enclose the outside of the battery housing part, and includes an annular waterproof seal member 31 which is stuck fast to the outer peripheral surface of the battery housing part to prevent liquid from getting into the battery housing part. The waterproof seal member 31 comes with a dome 32 which is formed in a circumferential direction thereof and can be deformed by compression in a height direction, and is fixed to the reverse side of the cover, with the protruded side of the dome 32 directed toward the outer peripheral surface.

Description

  The present invention relates to a battery housing cover that covers a battery housing that houses a battery, and an electronic apparatus.

  Recently, there is an increasing demand for highly waterproof electronic devices (for example, mobile phones). In order to improve the waterproofness of the electronic device, it is essential to waterproof the gap between the battery housing cover and the battery housing that opens and closes each time the battery is inserted and removed. This is because water entering the battery compartment immediately leads to an electrical short. As a typical structure for waterproofing the battery housing portion, for example, a structure is known in which an annular waterproof seal material made of an elastic material is sandwiched between the outer peripheral surface of the battery housing portion and the battery housing portion cover ( For example, see Patent Document 1).

JP 2002-134948 A

  However, due to variations in the design dimensions of both the main body of the electronic device including the battery storage portion and the battery storage portion cover, the gap between the main body and the battery storage portion cover is likely to fluctuate. For this reason, the pressure with respect to the waterproof sealing material is likely to fluctuate. For example, if the gap is too small than the thickness of the waterproof seal material, the waterproof seal material will not be sufficiently deformed. There is a problem that load is applied and it is easy to cause damage. In addition, the waterproof sealing material with a small deformation amount also causes an obstacle to thinning of the electronic device. On the other hand, when the gap is too larger than the thickness of the waterproof seal material, there is a problem that the seal between the waterproof seal material and the outer peripheral surface of the battery housing portion becomes insufficient and the waterproof property is lowered.

  The present invention has been made to solve such a problem, and even if the gap between the main body of the electronic device and the battery housing portion cover fluctuates, the fluctuation can be sufficiently accommodated, and the components of the electronic device can be excessively applied. An object of the present invention is to provide a battery housing cover and an electronic device that can reduce a heavy load and can achieve high waterproofness.

  In order to achieve the above object, one embodiment of the present invention is a battery storage unit cover fixed to face a battery storage unit that stores a battery in an electronic device, and is disposed so as to surround the outside of the battery storage unit. An annular waterproof sealing material that is in close contact with the outer peripheral surface of the battery housing portion and prevents liquid from entering the battery housing portion. The waterproof sealing material is formed in the circumferential direction and is compressible and deformable in the height direction. It is a battery housing part cover which has a dome and fixed the waterproof seal material to the back of the cover with the protruding side of the dome facing the outer peripheral surface.

  According to another embodiment of the present invention, in the waterproof sealing material, a battery storage unit cover in which the outer opening end located at the radially outer side of the cover back surface is fixed to the cover back surface in the dome opening end portion. is there.

  According to another embodiment of the present invention, in the waterproof sealing material, the dome communicates with the inside and outside of the dome on the bottom surface of the inner opening end portion which is the opening end portion of the dome and located radially inside the back surface of the cover A battery housing cover having a plurality of grooves.

  Another embodiment of the present invention further includes a protruding portion that protrudes toward the opening side of the dome on the inner side of the dome, and the protruding portion has a length that forms a gap with the back surface of the cover. It is a storage unit cover.

  Another embodiment of the present invention is a battery compartment cover further comprising a second dome that opens on the opposite side to the opening side of the dome.

  Another embodiment of the present invention is a battery storage unit cover further including a deformable portion that can increase an area in contact with the outer peripheral surface at the time of compressive deformation in the height direction on the side opposite to the opening side of the dome.

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

  An embodiment of the present invention includes a battery storage unit that stores a battery, a battery storage unit cover that covers the battery storage unit, and an outer peripheral surface of the battery storage unit and a battery storage unit that are disposed so as to surround the outside of the battery storage unit. An annular waterproof sealing material that is in close contact with the cover and prevents liquid from entering the battery compartment, and the waterproof sealing material has a dome formed in its circumferential direction and compressible in the height direction. The electronic device has a waterproof sealing material fixed to the outer peripheral surface of the battery housing portion with the protruding side of the dome facing the back surface of the battery housing portion cover.

  According to the present invention, even if the gap between the main body of the electronic device and the battery housing portion cover fluctuates, it can sufficiently cope with the fluctuation, reduces an excessive load on the components of the electronic device, and has high waterproofness. Can be achieved.

FIG. 1 is a perspective view showing a battery storage state of the electronic apparatus according to the first embodiment of the present invention. FIG. 2 is a rear view of the electronic apparatus shown in FIG. FIG. 3 is a perspective view of the back side of the battery compartment cover shown in FIG. FIG. 4 is a rear view of the battery housing unit cover shown in FIG. 3. FIG. 5 is a cross-sectional view showing a state where only the main body side of the electronic device shown in FIG. 2 is cut along the line AA, and a state in which the battery housing cover is to be attached to the main body. FIG. 6 is a cross-sectional view showing a state in which the battery compartment cover is completely attached to the main body from the state shown in FIG. FIG. 7 is a cross-sectional view showing a deformation state of the waterproof seal material before and after attaching the battery housing cover shown in FIG. 5 to the main body. FIG. 8 is an enlarged cross-sectional view showing the vicinity of the waterproof seal material of the battery housing cover of the electronic device according to the second embodiment of the present invention. FIG. 9 is a perspective view showing a part of the waterproof seal material of the battery housing cover of the electronic device according to the third embodiment of the present invention. FIG. 10 is an enlarged cross-sectional view of the vicinity of the waterproof seal material of the battery housing cover of the electronic device according to the fourth embodiment of the present invention. FIG. 11 is a graph showing an example of a stroke amount-pressure curve when the waterproof sealing material shown in FIG. 10 is used. FIG. 12 is an enlarged cross-sectional view showing the vicinity of the waterproof seal material of the battery housing cover of the electronic device according to the fifth embodiment of the present invention. FIG. 13 is a graph showing an example of a stroke amount-pressure curve when the waterproof sealing material shown in FIG. 12 is used. FIG. 14 is an enlarged cross-sectional view of the vicinity of the waterproof seal material of the battery housing cover of the electronic device according to the sixth embodiment of the present invention. FIG. 15 is a cross-sectional view of the main body of the electronic apparatus according to the seventh embodiment, taken along the line AA shown in FIG. FIG. 16 is a cross-sectional view showing the deformation state of the waterproof seal material before and after attaching the battery housing cover to the main body in the region B shown in FIG.

  Next, embodiments of the battery housing cover and the electronic device of the present invention will be described with reference to the drawings. Hereinafter, in the description of the embodiment of the electronic device, the embodiment of the battery housing portion cover will also be described.

<First embodiment>

  FIG. 1 is a perspective view showing a battery storage state of the electronic apparatus according to the first embodiment of the present invention. FIG. 2 is a rear view of the electronic apparatus shown in FIG.

  A cellular phone device 1 which is an example of an electronic device according to the first embodiment of the present invention is a foldable device, and is a thin and substantially rectangular parallelepiped main body 1a having an operation unit, and a thin and substantially rectangular parallelepiped body having a display. The display unit 1b has a structure coupled via a rotating unit. The main body 1a includes a battery storage unit 10 that stores a thin, substantially rectangular parallelepiped battery 2 and a battery storage unit cover 20 that covers the battery storage unit 10 on the back side corresponding to the side opposite to the operation unit. The periphery of the battery housing portion 10 is shaped like a back surface (cover back surface) 20a of the battery housing portion cover 20 so that both the back surface and both side surfaces of the main body 1a are substantially flat with the battery housing portion cover 20 attached. It has a three-dimensional shape along. Specifically, it is as follows. A substantially horizontal outer peripheral surface 11 is provided on the outer periphery of the battery storage unit 10. In-plane left and right and lower edges of the outer peripheral surface 11 are provided with stepped surfaces 16 that are recessed and narrow inwardly of the main body 1a. The upper edge of the outer peripheral surface 11 is formed one step higher by a thickness substantially equal to the thickness of the battery housing cover 20. The outer peripheral surface 11 is provided with engaging recesses 12 and 13 in the left and right directions within the surface, respectively, and spaced apart in the vertical direction within the surface. Moreover, the outer peripheral surface 11 is provided with the one engagement recessed part 14 in the downward direction in the surface.

  The battery compartment cover 20 includes a side surface 21 that is continuously formed in the in-plane left-right direction and the downward direction. The side surface 21 protrudes to the battery 2 side from the inner surface surrounded by the side surface 21 and can protrude from the step surface 16 formed on the main body 1a side when the battery housing portion cover 20 is attached to the main body 1a. A surface 26 is provided. The battery housing part cover 20 includes a protruding claw part 25 on the upper side in the plane. The nail | claw part 25 is formed in the position and shape which can be inserted in the engagement recessed part 15 (refer FIG. 5) formed in the surface upper direction of the outer peripheral surface 11 of the main body 1a. The battery storage unit cover 20 includes a linear protrusion 27 that slightly protrudes from the outer surface at a position close to the claw portion 25 on the outer surface. The convex portion 27 is formed so that the user can easily operate when the battery housing portion cover 20 is attached or detached.

  FIG. 3 is a perspective view of the back side of the battery compartment cover shown in FIG. FIG. 4 is a rear view of the battery housing unit cover shown in FIG. 3.

  The battery storage unit cover 20 includes one engagement convex portion 22 and one engagement convex portion 24 and one engagement convex portion 24 at a position close to the protruding surface 26 on the cover rear surface 20a. The two sets of engaging convex portions 22 and 23 are formed at positions and sizes that can be engaged with the two sets of engaging concave portions 12 and 13 formed on the outer peripheral surface 11 of the main body 1a. Similarly, one engagement convex part 24 is also formed at a position and size that can be engaged with one engagement concave part 14 formed on the outer peripheral surface 11 of the main body 1a. When attaching the battery housing portion cover 20 to the main body 1a, the engaging convex portions 22, 23, 24 are inserted into the engaging concave portions 12, 13, 14, respectively, and the battery housing portion cover 20 faces upward in the plane. It slides and the nail | claw part 25 is inserted in the engagement recessed part 15 by the side of the main body 1a. A square frame-shaped waterproof sealing material 31 is fixed to an inner region surrounded by the engaging convex portions 22, 23, 24 on the cover rear surface 20 a of the battery housing cover 20. The waterproof sealing material 31 is an annular elastic member that is disposed so as to surround the outside of the battery storage unit 10 and is in close contact with the outer peripheral surface 11 of the battery storage unit 10 to prevent liquid from entering the battery storage unit 10. .

  The waterproof sealing material 31 has two open ends fixed to the cover back surface 20a by adhesion. However, the waterproof seal material 31 may not be bonded to the cover back surface 20a but may be fitted into a recess formed in the cover back surface 20a. Here, “fixing” is interpreted in a broad sense regardless of means such as fitting, adhesion, and welding, and whether or not it can be easily detached. On the other hand, “fixing” described later is interpreted in a narrower sense than fixing, and is a fixing method that cannot be easily separated like adhesion or welding. It means a fixing method that may be invited.

  FIG. 5 is a cross-sectional view showing a state where only the main body side of the electronic device shown in FIG. 2 is cut along the line AA, and a state in which the battery housing cover is to be attached to the main body. FIG. 6 is a cross-sectional view showing a state in which the battery compartment cover is completely attached to the main body from the state shown in FIG. FIG. 7 is a cross-sectional view showing a deformation state of the waterproof seal material before and after attaching the battery housing cover shown in FIG. 5 to the main body.

  As shown in FIGS. 5 to 7, the waterproof sealing material 31 has a substantially U-shaped cross section, is formed along the circumference of the waterproof sealing material 31, and has a dome 32 that can be compressed in the height direction. The dome 32 is fixed to the cover back surface 20a with the opening side facing the cover back surface 20a. The opening end portions 33 and 34 on the opening side of the dome 32 are formed to protrude outward from the dome 32. Since the opening end 33 is further away from the center of the cover back surface 20a than the other opening end 34, the opening end 33 is hereinafter referred to as an “outside opening end 33”. For the same purpose, the opening end 34 is referred to as an “inner opening end 34”. The dome 32 includes a protruding portion 35 having a rectangular cross section that protrudes toward the outer peripheral surface 11 at a ridge portion continuous in the circumferential direction. However, the protruding portion 35 is not an essential configuration, and the ridge portion of the dome 32 may be configured to be a substantially curved surface.

  The waterproof sealing material 31 is preferably formed of an elastomer rich in elasticity. Examples of the elastomer include silicone rubber, urethane rubber, ethylene propylene diene rubber (EPDM), fluorine rubber, nitrile rubber (NBR), and natural rubber. As described above, the waterproof sealing material 31 has a substantially U-shaped groove inside the dome 32, and is easily deformed in the height direction of the dome 32. For this reason, as shown in FIG. 7, the waterproof seal material 31 is compressed and deformed by a distance L when the battery housing cover 20 is attached to the main body 1a, and the outer peripheral surfaces of the battery housing cover 20 and the main body 1a from the outside. It is possible to effectively prevent the liquid from entering the gap with 11. Further, the easily deformable structure of the waterproof seal material 31 contributes effectively even when the gap is large. The actual gap is narrower than the assumed gap by selecting the height of the waterproof sealing material 31 on the assumption that the gap is the largest due to the design dimensional tolerances of the battery compartment cover 20 and the main body 1a. Even so, the waterproof sealing material 31 is easily compressed and deformed in the height direction, and can exhibit high waterproofness.

<Second Embodiment>

  Next, a battery storage unit cover and an electronic device according to a second embodiment of the present invention will be described. The second embodiment is the same as the first embodiment except that only the bottom surface of the outer opening end of the waterproof seal material is fixed to the back of the cover and the inner opening end is not fixed to the back of the cover. . For this reason, in 2nd embodiment, description of the part which is common in 1st embodiment is abbreviate | omitted.

  FIG. 8 is an enlarged cross-sectional view showing the vicinity of the waterproof seal material of the battery housing cover of the electronic device according to the second embodiment of the present invention.

  In the second embodiment, the waterproof sealing material 31 fixes only the outer opening end portion 33 to the cover back surface 20a with the adhesive layer 36 interposed therebetween, while the inner opening end portion 34 is not fixed to the cover back surface 20a. Under such circumstances, when the battery housing cover 20 is fixed to the main body 1a, the waterproof sealing material 31 is compressed between the cover back surface 20a and the outer peripheral surface 11 of the main body 1a. As a result, the dome 32 is compressed and deformed so that the inner opening end 34 moves slightly inward in the radial direction of the cover back surface 20a, the inner protrusion 35 is on the outer peripheral surface 11, and the bottom surface of the inner opening end 34 is the cover. Each is in close contact with the back surface 20a. Even if a liquid (water or the like) tries to enter the gap between the main body 1a and the battery housing cover 20, both the adhesive 36 and the protruding portion 35 can prevent the liquid from entering. Further, since the air in the dome 32 escapes from the inner opening end 34 when the dome 32 is compressed, the dome 32 of the waterproof sealing material 31 can be easily formed according to the gap between the cover back surface 20a and the outer peripheral surface 11. It can be compressed and deformed. Thus, the battery storage unit cover 20 according to the second embodiment is more easily deformed in the height direction than the first embodiment.

<Third embodiment>

  Next, a battery storage unit cover and a third embodiment of the electronic device according to the present invention will be described. The third embodiment is common to the first embodiment except for the shape of the inner opening end of the waterproof seal material. For this reason, in 3rd embodiment, description of the part which is common in 1st embodiment is abbreviate | omitted.

  FIG. 9 is a perspective view showing a part of the waterproof seal material of the battery housing cover of the electronic device according to the third embodiment of the present invention.

  In the third embodiment, the waterproof sealing material 31 includes a plurality of semi-cylindrical grooves 34 a communicating with the inside and outside of the dome 32 on the bottom surface of the inner opening end 34. The groove 34 a is formed to draw air inside the dome 32 outward when the waterproof sealing material 31 is compressed, and to allow air to enter the dome 32 from the outside when the waterproof sealing material 31 is extended. Note that only one groove 34 a may be provided without providing a plurality of grooves 34 a around the entire circumference of the waterproof seal material 31. Since the groove 34a allows air to move freely in and out of the dome 32, the bottom surface of the outer opening end portion 33 and the bottom surface of the inner opening end portion 34 excluding the groove 34a are connected to each other through the cover back surface 20a. Even if the waterproof sealing material 31 is firmly attached to the dome 32, the waterproof sealing material 31 can be easily elastically deformed without excessively receiving the air resistance in the dome 32. However, the inner opening end 34 may not be fixed to the cover back surface 20a, and only the outer opening end 33 may be fixed to the cover back surface 20a.

<Fourth embodiment>

  Next, a battery storage unit cover and a fourth embodiment of the electronic device according to the present invention will be described. The fourth embodiment is the same as the second embodiment except that a protrusion is provided inside the dome of the waterproof seal material. For this reason, in 4th embodiment, description of the part which is common in 2nd embodiment is abbreviate | omitted.

  FIG. 10 is an enlarged cross-sectional view of the vicinity of the waterproof seal material of the battery housing cover of the electronic device according to the fourth embodiment of the present invention. FIG. 11 is a graph showing an example of a stroke amount-pressure curve when the waterproof sealing material shown in FIG. 10 is used.

  In the fourth embodiment, the waterproof sealing material 31 is a protrusion that protrudes from the top of the dome 32 toward the opening side along the circumferential length of the waterproof sealing material 31 inside the dome 32 having a substantially U-shaped cross section. 37. The length of the protrusion 37 is a length that forms a gap between the tip of the protrusion 37 and the cover back surface 20a. For this reason, according to the magnitude | size of the clearance gap between the battery accommodating part cover 20 and the outer peripheral surface 11 of the main body 1a, it can be in the state which the protrusion part 37 does not reach the cover back surface 20a, and the state which reaches the cover back surface 20a. The relationship between the stroke amount from the position at which the compressive deformation of the waterproof seal material 31 starts (represented by S on the horizontal axis in FIG. 11) and the pressure applied to the waterproof seal material 31 (represented by F on the vertical axis in FIG. 11). When shown in the graph, the curve shape illustrated in FIG. 11 is obtained. Until the projecting portion 37 contacts the cover back surface 20a, the relationship between the stroke amount and the pressure is on the curve up to the second inflection point M. When the gap between the cover back surface 20a and the outer peripheral surface 11 is narrower and the protruding portion 37 is in contact with the cover back surface 20a, the pressure applied to the waterproof seal material 31 increases rapidly. The protrusion 37 functions as a stopper for preventing excessive compression deformation of the waterproof seal material 31. The length of the protruding portion 37 may be a length in contact with the cover back surface 20 a as long as it does not exceed the opening surface of the dome 32.

<Fifth embodiment>

  Next, a fifth embodiment of the battery compartment cover and the electronic device of the present invention will be described. The fifth embodiment is common to the fourth embodiment except for the shape of the waterproof seal material. For this reason, in 5th embodiment, it mainly demonstrates per shape of a waterproof seal material, and abbreviate | omits description of the part which is common in 4th embodiment.

  FIG. 12 is an enlarged cross-sectional view showing the vicinity of the waterproof seal material of the battery housing cover of the electronic device according to the fifth embodiment of the present invention. FIG. 13 is a graph showing an example of a stroke amount-pressure curve when the waterproof sealing material shown in FIG. 12 is used.

  In the fifth embodiment, the waterproof seal material 41 is an annular seal material having a square frame shape in plan view, like the waterproof seal material 31 described above. The waterproof sealing material 41 includes a dome 42 having a substantially U-shaped cross section that opens largely toward the cover back surface 20a along the circumference. The dome 42 has a through groove in the vicinity of the ridge, and includes standing plates 45 and 46 connected to both sides of the through groove. The end surfaces 45a and 46b of the standing plates 45 and 46 are places where they contact the outer peripheral surface 11 of the main body 1a. The standing plates 45 and 46 are connected by a second dome 48 having a substantially U-shaped cross section that is recessed toward the outer peripheral surface 11 side. The opening volume of the second dome 48 is smaller than the opening volume of the dome 42. A protrusion 49 protruding toward the opening side of the dome 42 is provided on the top of the second dome 48 and inside the dome 42. The length of the protrusion 49 is a length that forms a gap between the tip of the protrusion 49 and the cover back surface 20a. The outer opening end 43 of the dome 42 is fixed to the cover back surface 20a via the adhesive layer 47, while the inner opening end 44 is not fixed to the cover back surface 20a. However, the inner opening end 44 may be fixed to the cover back surface 20a.

  When the waterproof sealing material 41 having such a shape is used, the protrusion 49 does not reach the cover back surface 20a according to the size of the gap between the battery housing cover 20 and the outer peripheral surface 11 of the main body 1a. The state can reach 20a, and further, the second dome 48 can relieve pressure after the protrusion 49 reaches the cover back surface 20a. The relationship between the stroke amount from the position at which the compressive deformation of the waterproof seal material 41 starts (represented by S on the horizontal axis in FIG. 13) and the pressure applied to the waterproof seal material 41 (represented by F on the vertical axis in FIG. 13). When shown in the graph, the curve shape shown by the solid line in FIG. 13 is obtained. Until the protrusion 49 comes into contact with the cover back surface 20a, the relationship between the stroke amount to the point P in the graph and the pressure is obtained. When the gap between the cover back surface 20a and the outer peripheral surface 11 is narrower and the protrusion 49 is in contact with the cover back surface 20a, the pressure can be released by the deformation of the second dome 48. The applied pressure becomes almost constant. When the gap is narrower than that, the pressure relaxation due to the deformation of the second dome 48 becomes a limit, so that the pressure on the waterproof seal material 41 increases rapidly after the point Q. Compared with the curve corresponding to the stroke amount-pressure curve shown in FIG. 11 (the curve indicated by the dotted line in FIG. 13), in the solid curve, the stroke amount when the pressure rapidly increases is X on the right side. This means that the range in which the pressure is relaxed is wide due to the presence of the second dome 48. As described above, the protruding portion 49 functions as a stopper like the above-described protruding portion 37, and the second dome 48 has a substantially constant pressure applied to the battery housing portion cover 20 and the main body 1a even if the gap slightly fluctuates. To function. The second dome 48 has no air inlet / outlet in addition to the opening surface. For this reason, the second dome 48 functions as a suction cup after being in close contact with the outer peripheral surface 11, and can further enhance the waterproof property between the outer peripheral surface 11 and the waterproof sealing material 41.

<Sixth embodiment>

  Next, a sixth embodiment of the battery compartment cover and the electronic device of the present invention will be described. The sixth embodiment is common to the fourth embodiment except for the shape of the waterproof seal material. For this reason, in 6th embodiment, it mainly demonstrates per shape of a waterproof seal material, and abbreviate | omits description of the part which is common in 4th embodiment.

  FIG. 14 is an enlarged cross-sectional view of the vicinity of the waterproof seal material of the battery housing cover of the electronic device according to the sixth embodiment of the present invention.

  In the sixth embodiment, the waterproof seal material 51 has a substantially U-shaped cross section, is formed along the circumferential length of the waterproof seal material 51, and has a dome 52 that can be compressed in the height direction. Is fixed to the cover back surface 20a with the opening side facing toward the cover back surface 20a. The outer opening end 53 and the inner opening end 54 of the dome 52 are formed so as to protrude outward from the dome 52. The outer opening end portion 53 is fixed to the cover back surface 20a via the adhesive layer 57, while the inner opening end portion 54 is not fixed to the cover back surface 20a. However, the inner opening end 54 may be fixed to the cover back surface 20a. The ridge portion of the dome 52 includes two deformed portions 55 and 56 that are curved away from the vicinity of the ridge portion of the dome 52. When the waterproof seal material 51 is compressed and deformed, the deforming portions 55 and 56 are deformed so that the area in contact with the outer peripheral surface 11 can be increased. As a result, when the gap between the battery housing cover 20 and the outer peripheral surface 11 of the main body 1a is very narrow, the deforming portions 55 and 56 expand the space 59 between the deforming portions 55 and 56, and the outer peripheral surface 11 like a suction cup. Can be adsorbed on the surface. For this reason, it is possible to further improve the waterproof property between the outer peripheral surface 11 and the waterproof seal material 51.

  Further, the dome 52 includes a protruding portion 58 that protrudes from the top portion toward the opening side on the inner side. The length of the protrusion 58 is a length that forms a slight gap with the cover back surface 20a. For this reason, under the situation where the dome 52 is slightly compressed, the protruding portion 58 functions as a stopper, and resists compression deformation of the dome 52. In contrast, the deformable portions 55 and 56 are more easily deformed than the dome 52, and when the waterproof seal material 51 is greatly compressed, the deformable portions 55 and 56 are preferentially pressed against the outer peripheral surface 11. However, the range in which the dome 52 can be compressed and deformed may be further expanded by increasing the gap between the tip position of the protrusion 58 and the cover back surface 20a.

<Seventh embodiment>

  Next, a seventh embodiment of the battery compartment cover and the electronic device of the present invention will be described. The seventh embodiment is the same as the second embodiment except that the waterproof seal material is attached to the main body side of the electronic device without being attached to the battery housing cover. For this reason, in 7th embodiment, description of the part which is common in 2nd embodiment is abbreviate | omitted.

  FIG. 15 is a cross-sectional view of the main body of the electronic apparatus according to the seventh embodiment, taken along the line AA shown in FIG. FIG. 16 is a cross-sectional view showing the deformation state of the waterproof seal material before and after attaching the battery housing cover to the main body in the region B shown in FIG.

  As shown in FIGS. 15 and 16, the main body 1 a of the mobile phone device 1, which is an example of an electronic device, fixes a waterproof seal material 31 to a substantially horizontal outer peripheral surface 11 that surrounds the outer periphery of the battery storage unit 10. The waterproof sealing material 31 is fixed with the ridge portion of the dome 32 facing the cover back surface 20 a and the opening side of the dome 32 facing the outer peripheral surface 11. As shown in FIG. 16, when the battery storage unit cover 20 is attached to the main body 1a, the waterproof sealing material 31 is compressed and deformed by a distance L, for example, according to the gap. The outer opening end 33 of the dome 32 is fixed to the outer peripheral surface 11 via the adhesive layer 36, while the inner opening end 34 is not fixed to the outer peripheral surface 11. Further, when the battery storage unit cover 20 is attached to the main body 1a, the protruding portion 35 at the ridge portion of the dome 32 is in close contact with the cover back surface 20a, and the air in the dome 32 escapes from the inner opening end portion 34 to the outside. For this reason, the dome 32 of the waterproof sealing material 31 can be easily compressed and deformed. As a result, even when a liquid (water or the like) tries to enter the gap between the main body 1a and the battery housing cover 20, both the adhesive material 36 and the protruding portion 35 can prevent the liquid from entering. The inner opening end 34 may be fixed to the outer peripheral surface 11.

<Other embodiments>

  As mentioned above, although each suitable embodiment of the battery accommodating part cover of this invention and an electronic device has been demonstrated, this invention is not limited to each above-mentioned embodiment, It can implement with various deformation | transformation.

  The groove 34a in the third embodiment may be formed in the waterproof sealing materials 31, 41, 51 in the fourth to seventh embodiments. Moreover, although 7th embodiment is a form which fixes the waterproof seal material 31 in 2nd embodiment to the main body 1a, it demonstrated in 1st embodiment or each 3rd-6th embodiment. The waterproof sealing materials 31, 41, 51 may be fixed to the main body 1a side. Moreover, you may provide the protrusion part 37 of the waterproof seal material 31 which concerns on 4th embodiment in the waterproof seal material 31 which concerns on 1st embodiment. Thus, the components of the first to seventh embodiments can be combined with each other within a combinable range. Further, instead of the deforming portions 55 and 56 shown in FIG. 14, a deforming portion having the same form as the second dome 48 may be adopted. In the above-described embodiment, the protrusions 37, 49, and 58 are continuously formed along the circumferential length of the waterproof seal materials 31, 41, and 51, respectively, but may be formed intermittently depending on the circumferential length. .

  Further, in FIG. 8 and the like, the waterproof sealing materials 31, 41, 51 are fixed to the battery housing cover 20 or the main body 1a via the adhesive layers 36, 47, 57, but the adhesive layers 36, 47, 57 are Not required. For example, the waterproof sealing materials 31, 41, 51 and the battery housing portion cover 20 or the main body 1a may be integrally formed, or both may be fixed via an intermediate plate. Further, a side wall is provided on the battery housing portion cover 20 or the main body 1a so that the waterproof sealing materials 31, 41, 51 cannot be moved within the surface of the battery housing portion cover 20 or the main body 1a, and the waterproof sealing material 31, 41 and 51 may be brought into contact with each other.

  The present invention can be applied to any electronic device of a battery storage type in addition to the mobile phone device 1, and includes, for example, a fixed telephone device, a home audio device, an in-vehicle audio device, a car navigation device, and a battery. It can also be applied to equipment such as electric vehicles.

  INDUSTRIAL APPLICABILITY The present invention can be used for a battery housing cover that covers a battery in the battery housing and an electronic device to which the battery housing cover is attached.

1 Mobile phone equipment (an example of electronic equipment)
2 Battery 10 Battery storage part 11 Outer peripheral surface 20 Battery storage part cover 20a Cover back surface 31 Waterproof sealing material 32 Dome 33 Inner opening end (opening end)
34 Outside open end (open end)
34a Groove 37 Projection 41 Waterproof sealant 42 Dome 43 Inner opening end (opening end)
44 Outside open end (open end)
48 Second dome 49 Projection 51 Waterproof sealant 52 Dome 53 Inner opening end (opening end)
54 Outside open end (open end)
55 Deformation part 56 Deformation part 58 Projection part

Claims (8)

A battery housing cover that is fixed opposite to a battery housing that houses a battery in an electronic device,
An annular waterproof seal is provided so as to surround the outside of the battery storage unit, and is in close contact with the outer peripheral surface of the battery storage unit to prevent liquid from entering the battery storage unit.
The waterproof sealing material has a dome formed in the circumferential direction and compressible and deformable in the height direction, and is fixed to the back surface of the cover with the protruding side of the dome facing the outer circumferential surface. Battery compartment cover.   2. The battery housing according to claim 1, wherein the waterproof seal material fixes an outer opening end portion, which is an opening end portion of the dome and is located radially outside the cover rear surface, to the cover rear surface. Department cover.   The waterproof sealing material has one or a plurality of grooves communicating with the inside and outside of the dome on the bottom surface of the inner opening end located at the radially inner side of the back surface of the cover, which is the opening end of the dome. The battery storage unit cover according to claim 1 or 2. A protrusion that protrudes toward the opening side of the dome is further provided inside the dome.
4. The battery storage unit cover according to claim 1, wherein the protrusion is provided with a length that forms a gap with the back surface of the cover. 5.   The battery storage unit cover according to claim 4, further comprising a second dome that opens on an opposite side to the opening side of the dome.   6. The deformed portion capable of increasing an area in contact with the outer peripheral surface at the time of compressive deformation in the height direction on a side opposite to the opening side of the dome, further comprising: The battery storage unit cover according to claim 1.   An electronic apparatus comprising the battery housing cover according to any one of claims 1 to 6. A battery compartment for storing the battery;
A battery compartment cover that covers the battery compartment;
An annular waterproof sealing material that is disposed so as to surround the outside of the battery housing portion and is in close contact between the outer peripheral surface of the battery housing portion and the battery housing portion cover to prevent liquid from entering the battery housing portion. When,
With
The waterproof sealing material has a dome formed in the circumferential direction and compressible and deformable in the height direction, with the protruding side of the dome facing the back surface of the cover of the battery storage unit cover, the outer periphery of the battery storage unit An electronic device characterized by being fixed to a surface.

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