JP2010081517A - Portable electronic apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a portable electronic apparatus capable of easily securing surface pressure, while improving insertion property of packing. <P>SOLUTION: A cellular phone 1 includes a rear case 11, in which an opening 11a and a groove 11b surrounding the opening 11a are formed, and a key sheet 27 that closes the opening 11a. The key sheet 27 includes a sheet 29 for closing the opening 11a and a packing 31, that extends along with an outer circumference of the sheet 29 and is press-fitted into the groove 11b. In the packing 31, a recess 47 that extends along the packing 31 is formed on a distal end face in a press-fitting direction. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a portable electronic device such as a mobile phone, a PDA, and a game machine.

A technique is known that uses packing in order to suppress the intrusion of moisture into the casing of a portable electronic device (for example, Patent Document 1). Further, a technique for attaching a closing member having a closing portion that closes the opening and a packing portion that extends along the outer periphery of the opening to a case having an opening and a groove that surrounds the opening is known. Yes. In this technique, when the packing portion is press-fitted into the groove portion, the closing member is attached to the case, and moisture intrusion from the opening portion is suppressed.
JP-A-6-213326

  In the technique for inserting the packing portion into the groove portion as described above, the packing portion preferably has good insertability into the groove portion from the viewpoint of improving workability. Moreover, it is preferable that a packing part has a large surface pressure with a packing part and the inner wall of a groove part from viewpoints, such as a waterproof improvement.

  Here, the improvement of the insertability and the securing of the surface pressure are in a trade-off relationship. That is, if the width of the packing part is reduced and the insertability is improved, the surface pressure is lowered. Conversely, if the width of the packing part is increased and the surface pressure is increased, the insertability is lowered. Therefore, the width of the packing portion needs to be set so as to appropriately balance the improvement of the insertability and the securing of the surface pressure.

  However, it is not always easy to balance improvement in insertability and securing of surface pressure. For example, a small packing portion attached to a portable electronic device has a small crushing cost, and it is difficult to ensure a surface pressure. However, if an attempt is made to increase the width of the packing portion in order to ensure the surface pressure, the surface pressure may increase rapidly and the insertability may rapidly decrease due to a minute change in dimensions. In addition, in a small packing part, the influence of tolerance on the adjustment of dimensions is large.

  An object of the present invention is to provide a portable electronic device that can easily secure the surface pressure while improving the insertability of the packing.

  The portable electronic device of the present invention includes a case in which an opening, a groove surrounding the opening, a closing portion that closes the opening, an outer periphery of the closing portion, and is press-fitted into the groove. A closing member having a packing portion, and the packing portion is formed with a recess extending along the packing portion on a distal end surface in the press-fitting direction.

  Preferably, the packing part is tapered.

  Suitably, the said packing part is formed with the protrusion part which protrudes on the outer peripheral side.

  Preferably, the inner peripheral surface of the packing portion is configured by a surface orthogonal to the closing portion.

  Preferably, in the inner peripheral side portion and the outer peripheral side portion of the packing portion with the concave portion as a boundary, the outer peripheral side portion has a lower bending rigidity toward the concave portion than the inner peripheral side portion.

  Preferably, the inner surface on the inner peripheral side and the inner surface on the outer peripheral side of the recess are separated from each other in a state where the packing portion is press-fitted into the groove portion.

  Suitably, the said groove part is comprised by the through-hole which penetrates the said case.

  Preferably, the closing portion and the packing portion are integrally formed of an elastic member, and a switch that can be pressed by the closing portion is provided on the inside of the case of the opening.

  ADVANTAGE OF THE INVENTION According to this invention, the portable electronic device which is easy to ensure a surface pressure, improving the insertion property of packing can be provided.

  FIG. 1 is a perspective view showing the appearance of a mobile phone 1 according to an embodiment of the present invention in a closed state.

  The mobile phone 1 is configured as a so-called foldable mobile phone, and includes a first housing 3 and a second housing 5 that are rotatably connected to each other between an open state and a closed state. . FIG. 1 shows a closed state in which the first housing 3 and the second housing 5 are overlapped.

  On the opposite side of the second housing 5 from the first housing 3, a key 7 for accepting a user's pressing operation and a display unit 9 for displaying a predetermined image are provided. The display unit 9 includes, for example, a liquid crystal display device or an organic EL display device.

  2 is a cross-sectional view taken along line II-II in FIG. However, only the surface side portion of the second housing 5 opposite to the first housing 3 is shown.

  The second housing 5 includes a front case (not shown) that constitutes a portion facing the first housing 3 and a rear case 11 (see also FIG. 3) that constitutes a portion opposite to the first housing 3. Have. The front case and the rear case 11 are fixed to each other by screws or the like, and various electronic components are accommodated in a space formed between the front case and the rear case 11. The front case and the rear case are made of resin, for example.

  The key 7 is exposed from an opening 11 a formed in the rear case 11. On the inner side of the casing of the key 7, a circuit board 13 disposed so as to face the inner side surface of the rear case 11 and a push-type switch 15 mounted on the circuit board 13 are provided. The switch 15 includes, for example, a fixed contact 17 and a movable contact 19 that is configured by a dome-shaped sheet metal and covers the fixed contact 17. The movable contact 19 is elastically deformed and reversed when pressed through the key 7 from the outside of the housing, and comes into contact with the fixed contact 17 while producing a click feeling.

  A first exterior member 21 and a second exterior member 23 are provided on the surface of the rear case 11. The first exterior member 21 is a translucent member that protects a screen of a display device (not shown) such as a liquid crystal display device that constitutes the display unit 9. The first exterior member 21 is made of resin, for example. The second exterior member 23 is made of the same material as the first exterior member 21, for example. For example, the first exterior member 21 and the second exterior member 23 are fitted in a recess formed in the rear case 11 and are fixed to the rear case 11 by an adhesive member such as an adhesive or a double-sided tape.

  FIG. 3 is an exploded perspective view of the rear case 11 and the key 7 as viewed from the inside of the housing. As shown in FIGS. 2 and 3, the key 7 is attached to the rear case 11 from the inner surface of the rear case 11.

  FIG. 4A is a perspective view of the key 7 as viewed from the outside of the housing. FIG. 4B is an exploded perspective view of the peripheral portion of the key 7 and the opening 11a of the rear case 11 as seen from the inside of the housing.

  As shown in FIGS. 2 and 4, the key 7 includes a key top 25 exposed to the outside of the housing and a key sheet 27 that supports the key top 25.

  The key top 25 is made of, for example, resin. The shape and size of the key top 25 may be set as appropriate. This embodiment illustrates the key top 25 formed in a substantially rectangular flat plate shape. The key top 25 is fixed to the key sheet 27 by a fixing member such as an adhesive or a double-sided tape.

  The key sheet 27 is made of an elastic member that does not allow water to pass through, such as rubber. The key sheet 27 has a sheet portion 29 and a packing portion 31 formed on the periphery of the sheet portion 29. The planar shape (the shape seen from the outside of the housing) of the sheet portion 29 and the packing portion 31 may be set as appropriate, but in the present embodiment, a case where it is formed in a rectangular shape is illustrated.

  The seat portion 29 includes a pedestal portion 33 to which the key top 25 is fixed, a pusher 35 that contacts the movable contact 19 of the switch 15, and a support portion 37 that supports the pedestal portion 33. The pedestal portion 33 is formed at the center side portion of the seat portion 29 and is one step higher than the outer peripheral portion (support portion 37) of the seat portion 29 toward the outside of the housing. Note that the pedestal portion 33 is convex on the outside of the housing, but is concave on the inside of the housing. The pusher 35 is provided at the center of the pedestal portion 33 on the inner side of the casing, and protrudes toward the inner side of the casing.

  As shown in FIG. 2, the support part 37 is supported by the circuit board 13 and holds the pedestal part 33 in a state of being separated from the circuit board 13. The pusher 35 is in contact with the center of the movable contact 19. When the key 7 is pressed from the outside of the housing, the inclined portion between the pedestal portion 33 and the support portion 37 is elastically deformed, and the pedestal portion 33 moves to the circuit board 13 side. Then, the pusher 35 presses the center of the movable contact 19, and the switch 15 is turned on.

  As shown in FIG. 4, the packing portion 31 is formed so as to extend along the outer peripheral edge of the support portion 37. Therefore, the packing part 31 is formed in a ring shape and surrounds the sheet part 29. The packing part 31 protrudes from the support part 37 to the outside of the housing.

  The rear case 11 has a groove 11b surrounding the opening 11a. The planar shape of the groove portion 11b (the shape seen from the outside of the housing) is substantially the same as that of the packing portion 31. The groove portion 11b is formed in a hole shape that penetrates the rear case 11 except for a part thereof.

  As shown in FIGS. 2 and 4B, the key sheet 27 is attached to the rear case 11 when the packing part 31 is press-fitted into the groove part 11b. As shown in FIG. 2, the key sheet 27 has the support portion 37 sandwiched between the rear case 11 and the circuit board 13. The packing part 31 suppresses intrusion of moisture from the opening part 11 a together with the sheet part 29. Moreover, the packing part 31 also suppresses the penetration | invasion of the water | moisture content from the groove part 11b.

  The groove 11b is covered from the outside of the housing by the first exterior member 21 and the second exterior member 23. In the first exterior member 21 and the second exterior member 23, a coating film or a metal film is formed in a portion overlapping the groove 11b. Accordingly, the groove 11b is not exposed to the outside.

  FIG. 5A is a cross-sectional view of the packing portion 31. FIG. 5B is a cross-sectional view of the groove 11b. In addition, the cross-sectional shape of the packing part 31 and the groove part 11b is substantially uniform over the whole extending direction (circumferential direction) of the packing part 31 and the groove part 11b.

  The packing part 31 has a base part 41 on the sheet part 29 side and a press-fit part 43 provided on the tip side of the base part 41.

  For example, the root portion 41 protrudes from the seat portion 29 with a certain width. The width W41 of the root part 41 is smaller than the width W11b of the groove part 11b.

  The press-fit portion 43 has a width W43 that is larger than the width W41 of the root portion 41. The width W43 is larger than the width W11b of the groove 11b. Therefore, the key sheet 27 is attached to the rear case 11 when the press-fit portion 43 is press-fitted into the groove portion 11b. The height H43 of the press-fit portion 43 is set slightly smaller than H11b so that the overall height of the packing portion 31 is substantially equal to the height H11b of the groove portion 11b.

  Specifically, the press-fit portion 43 is formed to have a larger width than the base portion 41 by projecting the outer peripheral surface of the press-fit portion 43 beyond the outer peripheral surface of the base portion 41 (the outer edge of the seat portion 29). In other words, the packing part 31 has a protruding part 45 that protrudes to the outer peripheral side on the tip side. The protruding amount (W43-W41) of the protruding portion 45 from the outer peripheral surface of the root portion 41 (the outer edge of the seat portion 29) may be set as appropriate. The protruding portion 45 (press-fit portion 43) has a shape in which the portion between the protruding portion 45b protrudes toward the outer peripheral side rather than the root side and the distal end side in the groove portion 11b. Note that the inner peripheral surface of the press-fit portion 43 is flush with the root portion 41. In other words, the inner peripheral surface of the packing portion 31 is configured by a surface orthogonal to the sheet portion 29.

  The press-fit portion 43 is tapered. That is, in the press-fit portion 43, the width on the tip side is smaller than the width on the root side. The width W47 at the tip of the press-fit portion 43 is smaller than the width W11b of the groove portion 11b.

  A concave portion 47 is formed on the distal end surface of the press-fit portion 43. The recess 47 is provided at the center of the tip surface in the width direction of the packing portion 31. Therefore, the inner peripheral side portion 31i and the outer peripheral side portion 31o of the packing portion 31 with the concave portion 47 as a reference have the same width on the distal end side. However, since the outer peripheral side portion 31o is configured to include the protruding portion 45, on the root side (the base portion 41), as the protruding amount of the protruding portion 45 decreases, the outer peripheral side portion 31o is more than the inner peripheral side portion 31i. The width is smaller.

  The concave portion 47 is formed so as to increase in width toward the opening side (the tip side of the press-fit portion 43). The recess 47 has an opening edge that matches the edge of the front end surface of the press-fit portion 43, and the opening width of the recess 47 matches the width W 47 of the front end surface. The depth D47 of the concave portion 47 is set to be slightly larger than the height of the tapered portion of the press-fit portion 43, for example, and is set to be half or less of the height of the protruding portion 45.

  The bottom of the recess 47, the opening edge of the recess 47 (the edge of the tip surface of the press-fit portion 43), and the corners such as the stepped portion of the protrusion 45 with respect to the root 41 are chamfered to a curved surface with an appropriate size. The occurrence of stress concentration is suppressed.

  The opening of the groove portion 11b is enlarged by chamfering the opening edge portion with the chamfered surface 11c. As shown on the left side of FIG. 2, the groove 11b is not partially chamfered. The width W11c of the chamfered opening is wider than the width W47 of the distal end surface of the press-fit portion 43. The width W11c may be larger or smaller than the width W43 of the press-fit portion 43.

  FIG. 6 is a cross-sectional view for explaining how the packing part 31 is press-fitted into the groove part 11b.

  First, as shown in FIG. 6A, the packing portion 31 has a tip portion formed in a tapered shape inserted into the groove portion 11b. Thereafter, when the packing portion 31 is pushed into the groove portion 11b, the packing portion 31 is elastically deformed by the reaction force received from the inner wall of the groove portion 11b, as shown in FIGS. 6B and 6C. Slide on the inner wall. And as shown in FIG.6 (c), the packing part 31 approaches or arrives at the bottom part of the groove part 11b.

  When the packing portion 31 is press-fitted, the press-fit portion 43 receives a compressive force from the outer peripheral surface and the inner peripheral surface, and elastic deformation is generated in which the concave portion 47 is reduced. That is, the inner peripheral side portion 31i and the outer peripheral side portion 31o are bent and deformed toward the concave portion 47. A substantially equal force is applied to the outer peripheral surface and the inner peripheral surface of the packing portion 31. However, since the outer peripheral side portion 31o has a smaller width on the base side than the inner peripheral side portion 31i and has a small bending rigidity, the packing portion 31 is bent mainly at the outer peripheral side portion 31o.

  In the embodiment described above, the mobile phone 1 includes the rear case 11 in which the opening 11a and the groove 11b surrounding the opening 11a are formed. The mobile phone 1 also has a key sheet 27 provided with a seat portion 29 that closes the opening portion 11a, and a packing portion 31 that extends along the outer periphery of the seat portion 29 and is press-fitted into the groove portion 11b. The packing part 31 is formed with a recess 47 extending along the packing part 31 on the front end surface in the press-fitting direction. Therefore, the packing part 31 is press-fitted into the groove part 11b while causing bending deformation in the direction in which the concave part 47 is reduced. As a result, the crushing margin can be substantially increased as compared with a case where only the compression deformation is caused in the packing portion and the packing portion is press-fitted. By adjusting the minute dimensions, it is possible to suppress a sudden increase in surface pressure and a rapid decrease in insertability, and it is easy to secure the surface pressure while improving insertability. Furthermore, compared with the case where the recessed part 47 is not formed, the volume (filling rate) press-fitted into the groove part 11b of the packing part 31 with respect to the volume of the groove part 11b becomes lower. As a result, it is suppressed that the packing part 31 protrudes from the groove part 11b. For example, the attachment property of the 1st exterior member 21 and the 2nd exterior member 23 improves.

  Since the packing part 31 is tapered, it is easy to insert into the groove part 11b. Furthermore, since the tip W is narrowed, the width W47 of the distal end surface is smaller than the width of the opening of the groove 11b (width W11c or width W11b), so that the insertability is further improved.

  The packing part 31 is formed with a protruding part 45 protruding to the outer peripheral side. Therefore, for example, in the groove portion 11b, the portion between them protrudes to the outer peripheral side rather than the base side and the tip side of the packing portion 31, and the crushing margin is increased and the surface pressure is increased while suppressing an increase in the filling rate. It is easy to secure. In addition, it is easy to bend and deform the outer peripheral side portion 31o toward the concave portion 47 rather than the inner peripheral side portion 31i.

  In addition, when the inner peripheral surface of the packing portion 31 is configured by a surface orthogonal to the seat portion 29, the undercut is less than when the protruding portions are provided on both the outer peripheral surface and the inner peripheral surface. The number of parts is small. That is, there is one undercut portion. Therefore, the yield when forming with a metal mold | die is suppressed and productivity improves.

  In the outer peripheral side portion 31o and the inner peripheral side portion 31i of the packing portion 31 with the concave portion 47 as a boundary, the outer peripheral side portion 31o has less bending rigidity toward the concave portion 47 than the inner peripheral side portion 31i. Therefore, the outer peripheral side portion 31o can be elastically deformed toward the concave portion 47 side rather than the inner peripheral side portion 31i. As a result, the influence of the elastic deformation of the packing part 31 on the dimension between the inner peripheral surfaces of the packing part 31 can be reduced, and the dimension between the inner peripheral surfaces of the packing part 31 can be generally determined. Therefore, it becomes easy to determine the dimensions of the packing part 31 and the groove part 11b so that the sheet part 29 is not wrinkled by press-fitting the packing part 31 into the groove part 11b.

  The inner surface on the inner peripheral side and the inner surface on the outer peripheral side of the recess 47 are separated from each other when the packing portion 31 is press-fitted into the groove portion 11b. Therefore, the occurrence of stress concentration at the bottom of the recess 47 and the rapid increase in restoring force are suppressed.

  The groove portion 11 b is configured by a through hole that penetrates the rear case 11. Therefore, the rear case 11 can be made thin while ensuring the height H43 of the packing part 31 and the height H11b of the groove part 11b. As a result, the portable electronic device can be reduced in size.

  The seat portion 29 and the packing portion 31 are integrally formed of an elastic member, and a switch 15 that can be pressed by the seat portion 29 is provided on the case inner side of the opening portion 11a. Accordingly, a key excellent in waterproofness can be provided at any position on the rear case 11.

  In the above embodiment, the mobile phone 1 is an example of the portable electronic device of the present invention, the rear case 11 is an example of the case of the present invention, and the seat portion 29 is an example of the closing portion of the present invention. The key sheet 27 is an example of the closing member of the present invention. A combination of the rear case 11, the first exterior member 21, and the second exterior member 23 may be regarded as an example of the case of the present invention. The second housing 5 or a combination of the first housing 3 and the second housing 5 may be regarded as an example of the case of the present invention. Only the portion of the seat portion 29 that faces the opening portion 11a or the combination of the seat portion 29 and the key top 25 may be regarded as the closing portion of the present invention. A combination of the key sheet 27 and the key top 25 may be regarded as the closing member of the present invention.

  The present invention is not limited to the above embodiment, and may be implemented in various aspects.

  The mobile electronic device is not limited to a mobile phone. For example, the portable electronic device may be a notebook computer, a PDA, a game machine, or a camera. Further, the casing of the portable electronic device is not limited to a folding type. The case may be an integrated structure (only one case), or two or more cases are connected to each other so as to be relatively movable by a method other than the folding type (sliding type, etc.). It may be a thing.

  The blocking member is not limited to a key sheet or a key. Fig.7 (a) is sectional drawing which shows the modification of a closure member.

  A housing 108 of the portable electronic device 101 includes a front case 110, a rear case 111 fixed to the front case 110, and a lid 112 that is attached to and detached from the rear case 111. The lid 112 opens and closes an opening 111 a formed in the rear case 111 by being attached to and detached from the rear case 111. The opening 111a is for attaching / detaching the battery 114 to / from the housing 108.

  FIG. 7B is an enlarged view of the region VIIb in FIG. The lid 112 includes a lid main body 129 that closes the opening 111 a and a packing portion 131. The packing part 131 extends along the outer periphery of the lid main body 129. The lid 112 is attached to the rear case 111 by press-fitting the packing part 131 into a groove part 111b formed so as to surround the opening part 111a. The lid 112 may be attached to the rear case 111 by an engaging portion or the like in addition to the press-fitting of the packing portion 131.

  The packing part 131 has the same shape as the packing part 31 of the embodiment. That is, a recess 147 is formed on the tip surface of the packing part 131. Therefore, the packing part 131 can have the same effect as the packing part 31 of the embodiment. In the above modification, the lid 112 is an example of the closing member of the present invention, and the lid body 129 is an example of the closing part of the present invention.

  The closing member may be formed by integrally forming the closing part and the packing part as in the key sheet of the embodiment, or the closing part and the packing part are separate members as in the modification of FIG. It may be formed by.

  The position, shape, depth, and width of the recess may be set as appropriate. For example, in the embodiment, the case where the concave portion 47 is arranged at the center in the width direction of the front end surface of the packing portion 31 is illustrated, but the concave portion 47 may be arranged on the outer peripheral side or the inner peripheral side from the center. In the embodiment, the case where the concave portion 47 has a larger diameter toward the opening side is illustrated, but the concave portion 47 may have a constant width. The width of the recess on the opening side may not coincide with the width of the tip surface. The size of the recess may be such that the inner surface on the inner peripheral side and the inner surface on the outer peripheral side are in contact with each other in a state where the packing portion is press-fitted into the groove portion.

  The packing portion may not be tapered. Even if it is not tapered, it is possible to press-fit. Further, even if the packing portion is not tapered, the insertion property can be improved by chamfering the opening edge portion of the groove portion and making the opening of the groove portion larger than the width of the packing portion. The protruding portion of the packing portion may not be formed, may be formed on both the outer peripheral side and the inner peripheral side, or may be formed only on the inner peripheral side. The method of forming the packing portion so that the outer peripheral side portion has a lower bending rigidity toward the concave portion than the inner peripheral side portion is not limited to the method of setting the widths of the outer peripheral side portion and the inner peripheral side portion. For example, you may form the outer peripheral side part and inner peripheral side part of a packing part with another material. In the embodiment, the case where the packing portion 31 includes the root portion 41 and the press-fit portion 43 is illustrated, but the root portion 41 may be omitted, and the packing portion 31 may be configured only by the press-fit portion 43.

  The groove part may be constituted by a through hole as in the embodiment, or may be constituted by a concave part as in the modification of FIG.

  The key constituted by the closing member is not limited to one in which the key top and the key sheet are constituted by separate members. In the embodiment, the key top 25 may be omitted, and the key 7 may be configured by only the key sheet 27.

1 is an external perspective view showing a mobile phone according to an embodiment of the present invention in a closed state. Sectional drawing of the II-II line | wire of FIG. The disassembled perspective view which shows the rear case and key of the mobile telephone of FIG. The perspective view which shows the key of FIG. Sectional drawing of the groove part in which the packing part and packing of the key of FIG. 3 are press-fitted. The figure explaining a mode that the packing part of FIG. 5 is press-fitted in a groove part. Sectional drawing of the portable electronic device which concerns on the modification of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Mobile phone (mobile electronic device), 11 ... Rear case (case), 11a ... Opening part, 11b ... Groove part, 27 ... Key sheet (closing member), 29 ... Sheet part (closing part), 31 ... Packing part, 37 ... concave portion.

Claims (8)

A case in which an opening and a groove surrounding the opening are formed;
A closing member having a closing portion that closes the opening, and a packing portion that extends along an outer periphery of the closing portion and is press-fitted into the groove portion;
Have
The said packing part is a portable electronic device by which the recessed part extended along the said packing part is formed in the front end surface of a press-fit direction. The portable electronic device according to claim 1, wherein the packing portion is tapered. The portable electronic device according to claim 1, wherein the packing portion includes a protruding portion that protrudes toward an outer peripheral side. The portable electronic device according to claim 3, wherein a surface on the inner peripheral side of the packing portion is configured by a surface orthogonal to the blocking portion. The inner periphery side part and outer periphery side part which make the said recessed part the boundary of the said packing part WHEREIN: The said outer periphery side part has a bending rigidity to the said recessed part side smaller than the said inner periphery side part. Item 1. A portable electronic device according to item 1. The portable electronic device according to any one of claims 1 to 5, wherein the inner surface on the inner peripheral side and the inner surface on the outer peripheral side of the recess are separated from each other in a state where the packing portion is press-fitted into the groove portion. The portable electronic device according to any one of claims 1 to 6, wherein the groove portion is configured by a through hole penetrating the case. The closing part and the packing part are integrally formed of an elastic member,
The portable electronic device of any one of Claims 1-7 in which the switch which can be pressed by the said obstruction | occlusion part is provided in the case inside side of the said opening part.

Images