JP2009188488A - Portable terminal device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enhance the waterproofness of a part where a flexible printed wiring board comes out of two cases containing an electronic circuit of a folding type portable terminal device which is made thin. <P>SOLUTION: A case 20 includes a waterproof wall 20b projecting in a rib shape, the flexible printed wiring board 23, a waterproof sheet 25 to be stuck on a top surface of the waterproof wall, and a pair of waterproof type both-sided tapes 22 and 24 for sticking the case and waterproof sheet together are used. The first waterproof type both-sided tape 22 is stuck on the top surface of the waterproof wall 20b of the case 20, the flexible printed wiring board 23 is stuck on the firsts waterproof type both-sided tape 22, and the second waterproof type both-sided tape 24 is further stuck thereupon to sandwich the flexible printed wiring board 23 between the first waterproof type both-sided tape 22 and the second waterproof type both-sided tape 24; and the waterproof sheet 25 is stuck thereupon like a cover for sealing, and thus the space enclosed with the waterproof wall 20b of the case 20 is sealed with the waterproof sheet 25. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a mobile terminal device, and more particularly to a mobile phone device with a waterproof function having a thin casing.

  In a conventional mobile phone device with a waterproof function, a waterproof method for preventing water from entering by sandwiching a rubber annular packing between a pair of housings fitted to each other has been used. In a so-called straight-type waterproof portable wireless device that forms a single housing by fitting a pair of housings, all electronic circuits are contained in a single housing, so this method provides a practical level of waterproofing. I was able to.

  However, with mobile phone devices, so-called foldable mobile phone devices have become widespread with the increase in size and functionality of display screens. Many foldable mobile phone devices have two housings each containing an electronic circuit, and a flexible printed wiring board is provided between the two housings for electrical connection between the electronic circuits in the two housings. It is connected with. For this reason, waterproofing including the part which takes out a flexible printed wiring board out of a housing | casing is needed.

  For example, a mobile phone device that uses a waterproof cap to bring a flexible printed wiring board out of a casing in a part different from the rubber annular packing is considered (for example, see Patent Document 1). However, in this case, the manufacturing cost is increased by the provision of the waterproof cap.

  Therefore, as another proposal, for each housing, a flexible printed wiring board is simply made of a rubber annular packing by using a waterproof structure in which a rubber annular packing is sandwiched between a pair of housings fitted to each other. It is possible to go outside. For example, FIG. 34 shows an exploded perspective view of a housing, packing, and the like so that the waterproof structure of a conventional folding cellular phone device can be seen. The waterproof structure of the conventional folding cellular phone device shown in FIG. 34 includes a pair of housings 80 and 81, a flexible printed wiring board 82, and a pair of packings 83 and 84. In the example of FIG. 34, the flexible printed wiring 82 is sandwiched from above and below by a pair of packings 83 and 84, and the pair of housings 80 and 81 are pressed from above and below from above and below the pair of packings 83 and 84 from above and below. And fixed. FIG. 35 shows a portion of the flexible printed wiring board 82 sandwiched from above and below by the pair of packings 83 and 84 in a state where the pair of housings 80 and 81 are fitted to form a single housing. Sectional drawing of the width direction is shown.

  However, as shown in FIGS. 34 and 35, using a waterproof structure in which a rubber annular packing is sandwiched between a pair of housings that fit together, the flexible printed wiring board is simply removed from between the rubber annular packing. 35, as shown in FIG. 35, a substantially triangular gap 85 is generated at the portion where the side surface of the flexible printed wiring board 82 and the pair of packings 83 and 84 face each other.

In view of this, a method has been proposed in which a convex rib is provided on the abutting surface of the packing to prevent the gap 85 as described above from being caused to adhere to each other so as to improve the waterproof property (see, for example, Patent Document 2). ).
JP 2004-214927 A JP 2002-198664 A

  However, foldable mobile phone devices are becoming thinner and housings are becoming thinner. In a structure in which a rubber annular packing is sandwiched between thin housings, the thin housing cannot be pressed firmly and evenly over the entire circumference. And in the part where pressing force is insufficient, there is a possibility that the packing does not sufficiently adhere and water may enter.

  Therefore, the present invention electrically connects an electronic circuit in a space surrounded by a waterproof wall in the casing and an electronic circuit in another casing while maintaining waterproofness and reducing the thickness of the casing. An object of the present invention is to provide a mobile terminal device such as a foldable mobile phone device that can be connected to the mobile phone.

  The portable terminal device according to the present invention is a casing, a waterproof wall surrounding a part or the whole of one surface of the casing, and an upper surface of the waterproof wall, and is surrounded by the waterproof wall. A waterproof sheet that seals the space, a pair of waterproof double-sided tape that adheres the waterproof wall and the waterproof sheet, and a flexible wiring that is electrically connected to an electronic circuit in the space surrounded by the waterproof wall The pair of waterproof double-sided tapes includes a first waterproof double-sided tape and a second waterproof double-sided tape, and the flexible wiring board includes the first waterproof type A configuration having a portion sandwiched between the double-sided tape and the second waterproof double-sided tape is adopted.

  With this configuration, the flexible wiring board is sandwiched between the first waterproof double-sided tape and the second waterproof double-sided tape in a configuration in which a pair of waterproof double-sided tapes adheres the waterproof wall and the waterproof sheet. Since there is a portion, even if there is a step in the flexible wiring board, the adhesive surfaces of the first waterproof double-sided tape and the second waterproof double-sided tape are in close contact. In addition, since the packing is not pressed by the pair of housings, no reaction force is generated when assembled into one housing, and a strong structure for preventing deformation of the housing is not necessary. For this reason, the electronic circuit in the space surrounded by the waterproof wall in the casing is electrically connected to the electronic circuit in the other casing while maintaining waterproofness and reducing the thickness of the casing. be able to.

  In the portable terminal device according to the present invention, the first waterproof double-sided tape is attached to the upper surface of the waterproof wall, and the flexible wiring board is attached to the first waterproof double-sided tape. The second waterproof double-sided tape is attached to the first waterproof double-sided tape and the flexible wiring board, and the waterproof sheet is attached to the upper surface of the second waterproof double-sided tape. The space surrounded by the waterproof wall of the housing is sealed with the waterproof sheet.

  With this configuration, it is possible to easily assemble a portable terminal device that can achieve electrical connection of wiring while maintaining waterproofness and reducing the thickness of the housing.

  In the portable terminal device according to the present invention, the flexible wiring board is a multilayer flexible wiring board, and the multilayer flexible wiring board is sandwiched between the first waterproof double-sided tape and the second waterproof double-sided tape. In such a portion, the multilayer flexible wiring board is laminated so that the thickness thereof changes stepwise in the width direction.

  With this configuration, since the change in the width direction of the thickness of the flexible wiring board can be reduced, the waterproof double-sided tape and the flexible wiring board are firmly adhered to each other even in a step portion where the thickness of the flexible wiring board changes, and the waterproofness is improved. . As a result, more wiring can be electrically connected while maintaining waterproofness and reducing the thickness of the housing.

  In the portable terminal device according to the present invention, the flexible wiring board is a multilayer flexible wiring board, and the multilayer flexible wiring board is sandwiched between the first waterproof double-sided tape and the second waterproof double-sided tape. In this portion, the width of the uppermost layer or the lowermost layer is smaller than the width of the adjacent layer, and the width other than the uppermost layer and the lowermost layer is larger than the width of at least one of the two adjacent layers.

  With this configuration, since the change in the width direction of the thickness of the flexible wiring board can be reduced, the waterproof double-sided tape and the flexible wiring board are firmly adhered to each other even in a step portion where the thickness of the flexible wiring board changes, and the waterproofness is improved. . As a result, more wiring can be electrically connected while maintaining waterproofness and reducing the thickness of the housing.

  In the portable terminal device according to the present invention, both or one of the first waterproof double-sided tape and the second waterproof double-sided tape may include the flexible wiring board and the second waterproof double-sided tape. The width of the portion sandwiched between the waterproof double-sided tape is larger than the width of the other portions.

  With this configuration, the area where the flexible wiring board and the pair of waterproof double-sided tapes are in close contact with each other increases, so the waterproof double-sided tape and the flexible wiring board are firmly attached even at the step where the thickness of the flexible wiring board changes. , Waterproofing will be better. As a result, it is possible to achieve electrical connection of wiring while maintaining waterproofness and realizing a thin casing.

  In the portable terminal device according to the present invention, both or one of the first waterproof double-sided tape and the second waterproof double-sided tape may include the flexible wiring board and the second waterproof double-sided tape. The width of the portion sandwiched by the waterproof double-sided tape is smaller than the width of the other portions.

  With this configuration, when the repelling force or restoring force of the waterproof double-sided tape is large, the repelling force or restoring force of the waterproof double-sided tape can be suppressed. There is no gap. Therefore, waterproofness is improved. As a result, it is possible to achieve electrical connection of wiring while maintaining waterproofness and realizing a thin casing.

  In the portable terminal device according to the present invention, both or one of the first waterproof double-sided tape and the second waterproof double-sided tape may include the flexible wiring board and the second waterproof double-sided tape. The structure which provided the slit in the part pinched | interposed with the waterproofing type double-sided tape is taken.

  With this configuration, when the repelling force or restoring force of the waterproof double-sided tape is large, the repelling force or restoring force of the waterproof double-sided tape can be suppressed. There is no gap. Therefore, waterproofness is improved. As a result, it is possible to achieve electrical connection of wiring while maintaining waterproofness and realizing a thin casing.

  In the portable terminal device according to the present invention, the flexible wiring board includes a portion sandwiched between the first waterproof double-sided tape and the second waterproof double-sided tape and a portion disposed inside the hinge portion. The width of the folded portion disposed between the hinge portion and the hinge portion is smaller than the width of the portion sandwiched between the first waterproof double-sided tape and the second waterproof double-sided tape. Take.

  With this configuration, the waterproof double-sided tape and flexible wiring board firmly adhere to each other even in a stepped portion where the thickness of the flexible wiring board changes, maintaining waterproofness and reducing the thickness of the housing, It is possible to achieve both an actual connection and a small hinge part.

  The foldable portable terminal device according to the present invention includes a first housing, a second housing, a waterproof wall surrounding a part or the whole of one surface of the first housing, and the waterproof A waterproof sheet that is attached to the upper surface of the wall and seals the space surrounded by the waterproof wall; a pair of waterproof double-sided tapes that attach the waterproof wall and the waterproof sheet; and the first housing. A flexible wiring board that electrically connects the electronic circuit in the space surrounded by the waterproof wall of the body and the electronic circuit in the second housing, the set of waterproof double-sided tape, A first waterproof double-sided tape and a second waterproof double-sided tape, wherein the flexible wiring board is sandwiched between the first waterproof double-sided tape and the second waterproof double-sided tape. The structure which has a part is taken.

  With this configuration, the flexible wiring board is sandwiched between the first waterproof double-sided tape and the second waterproof double-sided tape in a configuration in which a pair of waterproof double-sided tapes adheres the waterproof wall and the waterproof sheet. Since there is a portion, even if there is a step in the flexible wiring board, the adhesive surfaces of the first waterproof double-sided tape and the second waterproof double-sided tape are in close contact. In addition, since the packing is not pressed with a pair of housings, a strong structure is provided to prevent deformation of the first housing without generating a reaction force when the first housing is assembled into one housing. Is not necessary. For this reason, the electronic circuit in the space surrounded by the waterproof wall of the first casing and the electronic circuit in the second casing are realized while maintaining waterproofness and reducing the thickness of the first casing. Can be electrically connected.

  In the portable terminal device according to the present invention, in a configuration in which a pair of waterproof double-sided tapes adheres a waterproof wall and a waterproof sheet, the flexible wiring board includes a first waterproof double-sided tape and a second waterproof double-sided tape. Therefore, even if there is a step between the flexible wiring boards, the adhesive surfaces of the first waterproof double-sided tape and the second waterproof double-sided tape are in close contact with each other. In addition, since the packing is not pressed by the pair of housings, no reaction force is generated when assembled into one housing, and a strong structure for preventing deformation of the housing is not necessary. For this reason, the electronic circuit in the space surrounded by the waterproof wall in the casing is electrically connected to the electronic circuit in the other casing while maintaining waterproofness and reducing the thickness of the casing. be able to.

  Further, the foldable portable terminal device according to the present invention has a structure in which a pair of waterproof double-sided tapes adheres a waterproof wall and a waterproof sheet, and the flexible wiring board includes the first waterproof double-sided tape and the second waterproof type. Since it has the part pinched | interposed with the double-sided tape, even if there exists a level | step difference of a flexible wiring board, the adhesive surface of a 1st waterproof double-sided tape and a 2nd waterproof double-sided tape will closely_contact | adhere. In addition, since the packing is not pressed with a pair of housings, a strong structure is provided to prevent deformation of the first housing without generating a reaction force when the first housing is assembled into one housing. Is not necessary. For this reason, the electronic circuit in the space surrounded by the waterproof wall of the first casing and the electronic circuit in the second casing are realized while maintaining waterproofness and reducing the thickness of the first casing. Can be electrically connected.

  Hereinafter, the portable terminal device of the present invention will be described with reference to the drawings.

(Embodiment 1)
In Embodiment 1 of the present invention, a foldable mobile phone device with a waterproof function, which is configured by a thin casing, will be described as a mobile terminal device. FIG. 1 shows an external view of a foldable mobile phone device 100 which is a mobile terminal device according to the first embodiment. As shown in FIG. 1, the foldable mobile phone device 100 has a hinge portion 5 in which an upper housing 4 having a main display 3 such as a liquid crystal display portion is connected to a lower housing 2 having an operation key 1 such as a dial button. It is connected to open and close freely. FIG. 1 shows a state in which the upper housing 4 of the foldable mobile phone device 100 is opened. FIG. 2 shows an external view when the upper housing 4 of the foldable mobile phone device 100 is closed. Even when the upper housing 4 is closed, the sub-display 6 such as a liquid crystal display can be seen on the surface.

  FIG. 3 is an exploded perspective view when the components of the upper housing 4 of the foldable mobile phone device 100 are disassembled. The upper housing 4 is composed of a lower housing 20 and an upper housing 26 in appearance. In FIG. 3, the lower housing 20 is shown in the lowermost part of the drawing, the upper housing 26 is shown in the uppermost part, and the components housed in both housings are shown in the middle.

  The lower housing 20 is formed with a hinge hollow projection 20a at the end. Further, around the lower housing 20, a waterproof wall 20b is provided on the surface of the lower housing 20 so as to protrude as a substantially rectangular frame-shaped rib.

  Note that the waterproof wall 20b may be provided so as to protrude by integrally molding the lower housing 20 and the resin, or may be provided so as to protrude in close contact with the lower housing 20 as a separate part.

  In FIG. 3, the display circuit board 21 is shown on the lower housing 20. The display circuit board 21 has the sub-display 6 on the upper side and the main display 3 on the lower side. The display circuit board 21 is provided with a connector 21a on the upper surface. The display circuit board 21 may further include other electronic circuits. The display circuit board 21 is accommodated in a space surrounded by the waterproof wall 20b of the lower housing 20, and is fixed by fixing means (not shown). The shape of the first waterproof double-sided tape 22 is the same as the shape of the upper surface of the waterproof wall 20 b of the lower housing 20. The waterproof double-sided tapes 22 and 24 are cushion materials having a thickness of about 0.2 mm to 0.4 mm, and those having adhesive glue applied to the two front and back surfaces can be used. Further, since the cushion material used for the waterproof double-sided tapes 22 and 24 needs to be impermeable to water, a discontinuous foam type or closed cell type cushion material is preferably used.

  The flexible printed wiring board 23 which is a flexible wiring board is provided with a terminal portion 23a. The terminal portion 23a is connected to the connector 21a of the display circuit board 21 described above. A first waterproof double-sided tape 22 is attached to the flexible printed wiring board 23. The second waterproof double-sided tape 24 has the same shape as the first waterproof double-sided tape 22 and is opposite to the surface of the flexible printed wiring board 23 to which the first waterproof double-sided tape 22 is attached. Adhere to the surface.

  The waterproof sheet 25 is a plastic sheet such as a polyurethane film. The waterproof sheet 25 can be a transparent thin plastic sheet. The outer shape of the waterproof sheet 25 is the same as the outer shape of the waterproof double-sided tapes 22 and 24 and the upper surface of the waterproof wall 20b of the lower housing 20. The upper housing 26 is fixed to the lower housing 20 with screws (not shown).

  When assembling the upper housing 4, first, the display circuit board 21 is accommodated in a space surrounded by the waterproof wall 20 b of the lower housing 20, and is fixed by a fixing means (not shown). Next, the first waterproof double-sided tape 22 is attached to the upper surface of the waterproof wall 20 b of the housing, and the flexible printed wiring board 23 is attached to the first waterproof double-sided tape 22. The terminal 23 a of the flexible printed wiring board 23 is connected to the connector 21 a of the display circuit board 21. Then, a second waterproof double-sided tape 24 is attached on the flexible printed wiring board 23 and the first waterproof double-sided tape 22. As described above, after sandwiching the flexible printed wiring board 23 between the first waterproof double-sided tape 22 and the second waterproof double-sided tape 24, the waterproof sheet 25 is further placed on the second waterproof double-sided tape 24. Adhere like a lid with. Thus, the space surrounded by the waterproof wall 20b of the housing is sealed.

  FIG. 4 shows a plan view of the flexible printed wiring board 23. FIG. 5 shows a cross-sectional view taken along the line CC of the flexible printed wiring board 23 of FIG. FIG. 5 shows a structure in which the flexible thin wires 23b, which are conductors, are arranged in a horizontal line and are surrounded by a flexible resin sheet 23c, which is an insulator.

  FIG. 6 shows a state in which the first waterproof double-sided tape 22 and the second waterproof double-sided tape 24 are attached to the flexible printed wiring board 23. FIG. 6A is a cross-sectional view when the first waterproof double-sided tape 22 and the second waterproof double-sided tape 24 are arranged above and below the flexible printed wiring board 23. The first waterproof double-sided tape 22 and the second waterproof double-sided tape 24 are pressed and adhered to the surface of the flexible printed wiring board 23 from the direction of arrow A or arrow B, respectively. FIG. 6B shows a state where the first waterproof double-sided tape 22 and the second waterproof double-sided tape 24 are attached to the flexible printed wiring board 23. As described with reference to FIG. 3, the first waterproof double-sided tape 22 is attached to the waterproof wall 20b of the lower housing 20, the flexible printed wiring board 23 is attached thereon, and the second waterproof double-sided tape 24 is further attached. If it sticks, it can stick like FIG.6 (b).

  6B shows the flexible printed wiring when the upper surface of the waterproof wall 20b of the lower housing 20 (the portion on which the flexible printed wiring board 23 on the surface on which the first waterproof double-sided tape 22 is applied) is flat. A state in which the first waterproof double-sided tape 22 and the second waterproof double-sided tape 24 are attached to the plate 23 is shown. On the other hand, in FIG. 6C and FIG. 6D, the first waterproof type is shown in the flexible printed wiring board 23 when the upper surface of the waterproof wall 20b of the lower housing 20 is dented. The state which stuck the double-sided tape 22 and the 2nd waterproofing type double-sided tape 24 is shown. FIG. 6C shows a state in which the upper surface of the waterproof wall 20b is shaped to be recessed about half the thickness of the flexible printed wiring board 23. FIG. FIG. 6D shows a state in which the upper surface of the waterproof wall 20 b is shaped to be dented to the same extent as the thickness of the flexible printed wiring board 23.

  In FIG. 6, the thickness of the flexible printed wiring board 23 and the pair of waterproof double-sided tapes 22 and 24 is drawn large so as to be visible, but the specific thickness of the flexible printed wiring board 23 is 0. The thickness of the waterproof double-sided tapes 22 and 24 is about 0.2 mm to 0.4 mm. The flexible printed wiring board 23 has a certain degree of rigidity. Further, the waterproof double-sided tapes 22 and 24 have almost no rigidity (a cushion material is used). The flexible printed wiring board 23 is sandwiched between a pair of waterproof double-sided tapes 22 and 24 and is deformed when a pressing force is applied, so that the waterproof double-sided tapes 22 and 24 are in close contact with the side surface of the flexible printed wiring board 23. In this state, the waterproof double-sided tapes 22 and 24 are also in close contact with the upper surface or the lower surface of the flexible printed wiring board 23. As described above, the flexible printed wiring board 23 is covered with the waterproof double-sided tapes 22 and 24. Since the waterproof double-sided tapes 22 and 24 are in close contact with the flexible printed wiring board 23 including the side surfaces, water can be prevented from entering.

  In addition, when assembling the upper housing 4, the method of sequentially stacking other parts on the lower housing 20 has been described. However, the first waterproof double-sided surface is first attached to the flexible printed wiring board 23 using a jig. The tape 22 and the second waterproof double-sided tape 24 may be adhered.

  FIG. 7 shows a procedure for assembling the upper housing 4 after the first waterproof double-sided tape 22 and the second waterproof double-sided tape 24 are first attached to the flexible printed wiring board 23. First, as shown by the arrow D in FIG. 7, the display circuit board 21 is housed and fixed in the space surrounded by the waterproof wall 20 b of the lower housing 20. Then, as indicated by an arrow E in FIG. 7, the flexible printed wiring board 23 sandwiched between the first waterproof double-sided tape 22 and the second waterproof double-sided tape 24 is connected to the first waterproof double-sided tape 22. It sticks on the upper surface of the lower housing 20 using an adhesive surface. And the terminal part 23a of the flexible printed wiring board 23 is connected to the connector 21a of the circuit board 21 for display demonstrated previously. In this state, the waterproof sheet 25 is stuck on the upper surface of the second waterproof double-sided tape 24 and sealed. As a result, the space surrounded by the waterproof wall 20b of the lower housing 20 becomes a space sealed by the waterproof sheet 25, and the display circuit board 21 housed in the space is waterproofed.

  In particular, when a polyurethane sheet is used as the waterproof sheet 25, the waterproof sheet 25 and the upper housing (including the state where the upper housing 26 is removed) are used during the manufacturing process, during use of the product, or during maintenance after product sales. Even if 4 is pressed, the polyurethane sheet is freely deformed as the lower housing 20 is deformed. Therefore, the waterproof double-sided tapes 22 and 24 are not easily peeled off, and the waterproof function is maintained.

  8, the waterproof sheet 25 is adhered to the upper surface of the second waterproof double-sided tape 24 by the process shown in FIG. 7, and the space surrounded by the waterproof wall 20 b of the upper housing 4 is sealed with the waterproof sheet 25. This state is shown in a perspective view. In this state, the upper housing 26 is fixed to the lower housing 20 and the upper housing 4 is assembled.

  In the above description, the waterproof sheet 25 has been described as a polyurethane sheet, but the waterproof sheet 25 may be a rigid resin plate (for example, ABS resin) instead of the polyurethane sheet. When the waterproof sheet 25 is made of a rigid resin plate, the upper housing 4 is placed on a single box made up of the lower housing 20 and the rigid resin sheet waterproof sheet 25, and the lower housing 20 and the upper housing 26. It becomes the structure of the double box which piled up the box which consists of. Therefore, there is an effect that the rigidity of the thinned upper housing 4 is increased.

  Further, when a resin plate is used as the waterproof sheet 25, the waterproof sheet 25 can also have the function of the upper housing 26. For example, with respect to the upper surface of the upper housing 4 on the upper housing 26 side, the waterproof sheet 25 of a resin plate can be exposed on the surface (without being covered with the upper housing 26). Even when the waterproof sheet 25 of the resin plate is exposed on the surface, the side surface on the upper housing 26 side of the upper housing 4 may be covered with the upper housing 26.

  As described above, the foldable mobile phone device 100, which is the mobile terminal device according to the first embodiment, has a configuration in which a pair of waterproof double-sided tapes 22 and 24 attach the waterproof wall 20b and the waterproof sheet 25 to each other. Since the flexible printed wiring board 23, which is a flexible wiring board, has a portion sandwiched between the first waterproof double-sided tape 22 and the second waterproof double-sided tape 24, there is a step in the flexible printed wiring board 23. Also, the adhesive surfaces of the first waterproof double-sided tape 22 and the second waterproof double-sided tape 24 are in close contact with each other. Further, since the packing is not pressed by the pair of housings, a reaction force is not generated when the upper housing 4 is assembled into one housing, and a strong structure for preventing the deformation of the upper housing 4 is necessary. Absent. For this reason, the electronic circuit and the lower housing in the space (inside the internal unit) surrounded by the waterproof wall 20b in the upper housing 4 while maintaining waterproofness and reducing the thickness of the upper housing 4 The electronic circuit in 2 can be electrically connected.

  Furthermore, it is possible to easily assemble the foldable mobile phone device 100 that is a mobile terminal device that can maintain the waterproof property and can realize the electrical connection of the wiring while realizing the thinning of the upper housing 4.

(Embodiment 2)
Next, a foldable mobile phone device that is a mobile terminal device according to the second embodiment of the present invention will be described. The foldable mobile phone device according to the second embodiment of the present invention is characterized in that the flexible printed wiring board is multilayered. In the foldable mobile phone device according to the second embodiment, parts not particularly mentioned are the same as those of the foldable mobile phone device according to the first embodiment. Moreover, the same code | symbol is attached | subjected to the same or corresponding part in a figure.

  Recent cellular phone devices such as a folding cellular phone device have been improved in functionality, such as those with a TV broadcast receiving function being put into practical use. For this reason, in order to transmit many received signals to the display means, the number of wires passed through the flexible printed wiring board connecting the first casing and the second casing increases, and the flexible printed wiring board may be multilayered. It is done. When the flexible printed wiring board is multilayered, the thickness of the flexible printed wiring board increases. As the thickness of the flexible printed wiring board increases, the gap 85 on the side surface of the flexible printed wiring board 82 of FIG. 35 already described increases. When the gap 85 becomes large, water easily enters.

  Therefore, in the foldable mobile phone device according to the second embodiment of the present invention, a flexible thin wiring that is a wiring portion of each layer is arranged at the center of each layer, and dummy portions are arranged on both sides of the wiring portion. (The portion of the resin sheet without the flexible thin wire) is formed to change the width of each layer. FIG. 9 shows a plan view of the multilayer flexible printed wiring board 40 of the foldable mobile phone device according to the second embodiment of the present invention. FIG. 9 shows that the flexible printed wiring board 40 having a certain width is bent on one plane. Further, the portion 41 sandwiched between the first waterproof double-sided tape 22 and the second waterproof double-sided tape 24 of the flexible printed wiring board 40 has a flexible thin wire that is a wiring portion of each layer arranged in the center of each layer, Dummy portions are formed on both sides of the portion to change the width of each layer. For this reason, the portion 41 sandwiched between the first waterproof double-sided tape 22 and the second waterproof double-sided tape 24 of the flexible printed wiring board 40 is wider than the other portions.

  FIG. 10 shows an HH sectional view of a portion 41 sandwiched between the first waterproof double-sided tape 22 and the second waterproof double-sided tape 24 of the flexible printed wiring board 40 of FIG. As shown in FIG. 10A, the flexible printed wiring board 40 is a multilayer (specifically, an example of four layers) flexible printed wiring board. In the multilayer flexible printed wiring board (flexible printed wiring board 40), the thickness of the multilayer flexible wiring board is wide at the portion 41 sandwiched between the first waterproof double-sided tape 22 and the second waterproof double-sided tape 24. The layers are stacked so as to change stepwise in the direction. Specifically, as shown in FIG. 10A, the wiring portion is arranged in the center in the layer arranged almost in the center in the vertical direction, that is, in the layer 41a in the second stage from the top. There are no wiring parts on the left and right sides of the part, and dummy parts made of only a resin sheet are provided to maximize the width.

  As described above, the multilayer flexible printed wiring board 40 has the maximum width as the width of the layer disposed near the center in the vertical direction. The width is narrowed from the layer arranged near the center to the outside, that is, upward or downward. In FIG. 10 (a), the third layer 41b from the top, like the layer 41a, has the wiring portion arranged at the center, but the width of the left and right dummy portions of the wiring portion is reduced to a second width. The width is For the uppermost layer 40a and the lowermost layer 40b in the vertical direction, although the wiring portion is arranged in the center, the left and right dummy portions of the wiring portion are not provided and the width is set to the minimum width. With such a configuration, since the change in the width direction of the thickness of the flexible printed wiring board 40 can be reduced, the waterproof double-sided tapes 22 and 24 and the flexible printed wiring board can be used even in the stepped portion where the thickness of the flexible printed wiring board 40 changes. 40 adheres firmly and the waterproofness is improved. That is, the adhesive surfaces of the waterproof double-sided tapes 22 and 24 are attached to the side surfaces of the flexible printed wiring board 40 by sandwiching the waterproof printed double-sided tapes 22 and 24 from above and below the multilayer flexible printed wiring board 40, So that there are no gaps to penetrate. As a result, it is possible to realize electrical connection of more wires while maintaining waterproofness and realizing a thin upper casing 4.

  Note that the flexible printed wiring board 40 is not limited to the method of lamination as shown in FIG. 10A. For example, the width of the uppermost layer or the lowermost layer is smaller than the width of adjacent layers, and the uppermost layer and the lowermost layer. The same effect can be obtained by laminating such that the width other than is larger than the width of at least one of the two adjacent layers. When this is applied to the example of FIG. 10A, the width of the uppermost layer 40a is smaller than the width of the adjacent layer (second layer 41a from the top), and the width of the lowermost layer 40b is adjacent. It is smaller than the width of the layer (the third layer 41b from the top). The width of the second layer 41a from the top, which is a layer other than the uppermost layer or the lowermost layer, is at least one of the two adjacent layers (the uppermost layer 40a and the third layer 41b from the top) (in this case) , Both the uppermost layer 40a and the third layer 41b from the top) are wider than the width of the uppermost layer 40a. The width of the third layer 41b from the top, which is a layer other than the uppermost layer or the lowermost layer, is at least one of the two adjacent layers (the second layer 41a from the top and the lowermost layer 40b) (the lowermost layer). Larger than the width of 40b).

  In addition to the lamination as shown in FIG. 10A, the lamination as shown in FIGS. 10B and 10C may be used. In the case of stacking as shown in FIGS. 10B and 10C, the width of the uppermost layer or the lowermost layer is smaller than the width of the adjacent layer, and the width other than the uppermost layer and the lowermost layer is adjacent. Are stacked so as to be larger than the width of at least one layer, and the same effect as in the case of stacking as shown in FIG. Below, the example in the case of lamination | stacking as shown to Fig.10 (a) is demonstrated.

  FIG. 11 illustrates a state where a pair of waterproof double-sided tapes 22 and 24 are attached from above and below the multilayer flexible printed wiring board 40 of the foldable mobile phone device according to the second embodiment of the present invention. . FIG. 11A shows a cross-sectional view in which a flexible printed wiring board 40 and a pair of waterproof double-sided tapes 22 and 24 are arranged above and below it. Waterproof double-sided tapes 24 and 22 are pressed from the top and bottom of the flexible printed wiring board 40 as indicated by arrows I and J. Then, as shown in FIG. 11B, the waterproof double-sided tape is in close contact with the side surface or the stepped portion of the flexible printed wiring board 40. A gap is not formed on the side surface of the flexible printed wiring board 40, and water can be prevented from entering. The point that the upper surface of the waterproof wall 20b of the lower housing 20 may be dented is the same as in the first embodiment.

  FIG. 12 shows a procedure in which the flexible printed wiring board 40 according to the second embodiment of the present invention is sandwiched between waterproof double-sided tapes and then attached to the lower housing 20 and sealed with the waterproof sheet 25. Since the procedure is the same as that described in the first embodiment, the description thereof is omitted.

  As described above, the foldable mobile phone device that is the mobile terminal device according to the second embodiment can reduce the change in the width direction of the thickness of the flexible printed wiring board 40 that is the flexible wiring board. The waterproof double-sided tapes 22 and 24 and the flexible printed wiring board 40 are firmly adhered to each other at the step portion where the thickness of the board 40 changes, and the waterproofness is improved. As a result, more wirings can be electrically connected while maintaining waterproofness and reducing the thickness of the upper housing 4.

(Embodiment 3)
Next, a foldable mobile phone device that is a mobile terminal device according to a third embodiment of the present invention will be described. The foldable mobile phone device according to the third embodiment of the present invention is characterized in that the width of the waterproof double-sided tape is particularly wide at the portion (the sandwiching portion or the covering portion) that is in close contact with the flexible printed wiring board 40. . For example, in the first waterproof double-sided tape, the width of the portion sandwiching the flexible printed wiring board 23, which is a flexible wiring board, between the first waterproof double-sided tape and the second waterproof double-sided tape, The width of the second waterproof double-sided tape is larger than the width of the flexible printed circuit board 23 between the first waterproof double-sided tape and the second waterproof double-sided tape. Also try to be big. By widening the width, the adhesion area between the waterproof double-sided tape and the flexible printed wiring board is increased, and the waterproof effect can be enhanced.

  The reason why the width of the waterproof double-sided tape is not increased except for the portion that is in close contact with the flexible printed wiring board 40 is that if it is increased, the size of the entire folding cellular phone device will be increased accordingly. .

  In the foldable mobile phone device according to the third embodiment, the parts not particularly mentioned are the same as those of the foldable mobile phone device according to the first embodiment. Moreover, the same code | symbol is attached | subjected to the same or corresponding part in a figure.

  FIG. 13 is an exploded perspective view of the waterproof double-sided tapes 52 and 54 and the flexible printed wiring board 23 of the foldable mobile phone device according to the third embodiment of the present invention. In FIG. 13, the same flexible printed wiring board 23 as in the first embodiment is used, but the areas of the portions 52a and 54a to which the flexible printed wiring board 23 adheres are increased in the pair of waterproof double-sided tapes 52 and 54. is doing. Further, the area of the waterproof wall 20b and the waterproof sheet 25 of the lower housing 20 (not shown) is also increased.

  FIG. 14 shows a state where the waterproof double-sided tapes 52 and 54 and the flexible printed wiring board 23 of the foldable mobile phone device according to the third embodiment of the present invention are attached together. As shown in FIG. 14, since the area of the waterproof double-sided tape 52a, 54a where the flexible printed wiring board 23 adheres is large, the length of the waterproof double-sided tape 52a, 54a in close contact with the side surface of the flexible printed wiring board 23 Is getting longer. When the flexible printed wiring board sandwiched between the waterproof double-sided tapes in such a large area is pressed in this way, no gap is formed on the side surface of the flexible printed wiring board 23, and water can be prevented from entering. Further, even if a gap is generated in part, the possibility of forming a gap penetrating the side surface of the flexible printed wiring board 23 is suppressed to a low level, so that high waterproof performance is realized.

  Further, since the contact area between the waterproof double-sided tapes 52 and 54 and the flexible printed wiring board 23 is ensured, the waterproof double-sided tapes 52 and 54 can be thinned, and the waterproofness can be maintained and the electrical connection of the wiring can be achieved. The foldable mobile phone device can be thinned while realizing the above. In addition, there is an effect that positioning for attaching the waterproof double-sided tapes 52 and 54 is easy in the manufacturing process.

  In addition, as a shape when expanding the area of the waterproof double-sided tape, a square area may be projected as shown in FIG. 14, or a triangular or circular area may be projected. .

  FIG. 15 is a plan view in which a pair of waterproof double-sided tapes 55 (not shown) and 56 are widened along the side surface of the flexible printed wiring board 23 to increase the area as if they were H-shaped. Indicates. The waterproof double-sided tapes 55 (not shown) and 56 in FIG. 15 are different from those shown in FIG. 13 in which the entire width of the waterproof double-sided tape covering the flexible printed wiring board 23 is uniform. The area where the waterproof double-sided tape 55 (not shown) and 56 are attached along the side surface of the flexible printed wiring board 23 is increased by an area corresponding to 55a (not shown) or 56a.

  Here, as to the waterproof double-sided tape, as shown in FIG. 16, a part of a pair of waterproof double-sided tapes 55 and 56 may be provided as if they were H-shaped. Further, as shown in FIG. 17, one (the waterproof double-sided tape 56 in the case of FIG. 17) is provided with an H-shaped portion, and the other (the waterproof double-sided tape 57 in the case of FIG. 17) is widened. It may be a belt. In both cases, the waterproofness is increased by the increase in the area where the waterproof double-sided tape is attached along the side surface of the flexible printed wiring board 23.

  As described above, the foldable mobile phone device, which is the mobile terminal device according to the third embodiment, has a large area where the flexible printed wiring board 23 and the pair of waterproof double-sided tapes 52, 54, etc. are in close contact with each other. The waterproof double-sided tapes 52 and 54 and the flexible printed wiring board 23 are firmly adhered to each other at the stepped portion where the thickness of the flexible printed wiring board 23 changes, and the waterproofness is improved. As a result, it is possible to achieve electrical connection of wiring while maintaining waterproofness and realizing the thinning of the upper housing 4.

  In addition, it can replace with the flexible printed wiring board 23 of this Embodiment 3, and can also employ | adopt the flexible printed circuit board 40 of the shape etc. which were demonstrated in Embodiment 2. FIG. Further, at this time, as described in the second embodiment, the upper surface of the waterproof wall 20b of the lower housing 20 can be shaped to be dented.

(Embodiment 4)
Next, a foldable mobile phone device that is a mobile terminal device according to a fourth embodiment of the present invention will be described. In the foldable mobile phone device according to the fourth embodiment of the present invention, the width of the waterproof double-sided tape is narrowed at the portion (the sandwiching portion or the covering portion) that is in close contact with the flexible printed wiring board 23. For example, in the first waterproof double-sided tape, the width of the portion sandwiching the flexible printed wiring board 23, which is a flexible wiring board, between the first waterproof double-sided tape and the second waterproof double-sided tape, The second waterproof double-sided tape is smaller than the width, and the width of the portion sandwiching the flexible printed wiring board 23 between the first waterproof double-sided tape and the second waterproof double-sided tape is larger than the width of the other portions. Also try to be small. With this configuration, when the repelling force or restoring force of the waterproof double-sided tape is large, the repelling force of the waterproof double-sided tape (repulsive force due to the waterproof double-sided tape that is usually applied to a flat surface being applied to a non-planar part) ) Or restoring force (restoring force that the waterproof double-sided tape is crushed by the flexible printed wiring board 23 to return to the original state) can be suppressed.

  In the foldable mobile phone device according to the fourth embodiment, parts not particularly mentioned are the same as those of the foldable mobile phone device according to the first embodiment. Moreover, the same code | symbol is attached | subjected to the same or corresponding part in a figure.

  FIG. 18 is an exploded perspective view of the waterproof double-sided tapes 62 and 64 and the flexible printed wiring board 23 of the foldable mobile phone device according to the fourth embodiment of the present invention. In FIG. 18, the same flexible printed wiring board 23 as in the first embodiment is used, but the areas of the portions 62a and 64a to which the flexible printed wiring board 23 adheres are reduced in the pair of waterproof double-sided tapes 62 and 64. is doing. In addition, the area of the waterproof wall of the lower housing (not shown) is reduced.

  FIG. 19 shows a state where the waterproof double-sided tapes 62 and 64 and the flexible printed wiring board 23 of the foldable mobile phone device according to the fourth embodiment of the present invention are bonded together. Since the area of 64a shown in FIG. 19 is small, the length that the waterproof double-sided tapes 62a and 64a are in close contact with the side surface of the flexible printed wiring board 23 is shortened. When the flexible printed wiring board sandwiched between the waterproof double-sided tapes in such a small area is pressed in this way, no gap is formed on the side surface of the flexible printed wiring board 23 and water can be prevented from entering. This is the same as the embodiment. In addition to this, even if the repelling force or restoring force of the waterproof double-sided tapes 62, 64 is large, the waterproof double-sided tapes 62, 64 overlapping the flexible printed wiring board 23 have a small area. The repulsive force or restoring force of 62, 64 is small, and there is an effect that the waterproof double-sided tapes 62, 64 do not lift up due to the repelling force or restoring force over time.

  In addition, since the contact area between the waterproof double-sided tapes 62 and 64 and the flexible printed wiring board is ensured, the waterproof double-sided tapes 62 and 64 can be thinned, and the foldable mobile phone device can be thinned. In addition, there is an effect that it is easy to perform alignment for attaching the waterproof double-sided tapes 62 and 64 in the manufacturing process.

  FIG. 20 shows a plan view of a pair of waterproof double-sided tapes 65 (not shown) and 66 in which the area covering the flexible printed wiring board 23 is reduced to reduce the area. The waterproof double-sided tape 65 (not shown) and 66 in FIG. 20 are cut out only on one side of the waterproof double-sided tape that covers (pinches) the flexible printed wiring board 23 as already shown in FIGS. Unlike the one with a smaller width and a smaller area, both sides of the waterproof double-sided tape are cut away to make the width smaller and the area smaller.

  As for the waterproof double-sided tape, as shown in FIG. 21, notches 65a and 66a may be provided on both of the pair of waterproof double-sided tapes. That is, in the first waterproof double-sided tape 65, the width of the portion where the flexible printed wiring board 23 is sandwiched between the first waterproof double-sided tape 65 and the second waterproof double-sided tape 66 is the rest of the width. The second waterproof double-sided tape 66 is smaller than the width, and the width of the portion where the flexible printed wiring board 23 is sandwiched between the first waterproof double-sided tape 65 and the second waterproof double-sided tape 66 is other than that. You may make it smaller than the width | variety of this part. Further, as shown in FIG. 22, a cutout portion may be provided on one side and the other may be formed in a wide band shape. In both cases, even when the repelling force or restoring force of the waterproof double-sided tapes 62 and 64 is large, the waterproof double-sided tape is reduced to the extent that the area of the waterproof double-sided tape that covers the flexible printed wiring board 23 is reduced. The repulsive force or the restoring force is reduced and the waterproof property is increased.

  In addition, as a shape at the time of narrowing a waterproof double-sided tape width, you may make it make a width | variety narrow little by making a triangle cut. In FIG. 23, a pair of waterproof double-sided tapes 68 (not shown) and 69 are provided, and triangular cutout portions 68a (not shown) and 69a are provided in a portion covering the flexible printed wiring board 23. The top view at the time of narrowing and reducing an area is shown.

  As for the waterproof double-sided tape, as shown in FIG. 24, triangular cutout portions 68a and 69a may be provided on both sets of waterproof double-sided tape. Further, as shown in FIG. 25, a triangular cutout portion 92a may be provided on one end surface on one side, and a triangular cutout portion 94a may be provided on the other end surface on the other. In this case, by overlapping the cutouts alternately, the overlap of the waterproof double-sided tape covering the flexible printed wiring board 23 is reduced, and even if the restoring force of the waterproof double-sided tape is applied, the waterproof printed double-sided tape 23 is protected from the waterproof double-sided tape. The tape is difficult to peel off. As a result, waterproofness becomes high.

  As described above, the foldable mobile phone device that is the mobile terminal device according to the fourth embodiment has the waterproof double-sided tapes 68 and 69 when the repelling force or restoring force of the waterproof double-sided tapes 68 and 69 is large. Therefore, no gap is generated between the side surface of the flexible printed wiring board 23, which is a flexible wiring board, and the waterproof double-sided tapes 68, 69, and the like. Therefore, waterproofness is improved. As a result, it is possible to achieve electrical connection of wiring while maintaining waterproofness and realizing the thinning of the upper housing 4.

  In addition, it can replace with the flexible printed wiring board 23 of this Embodiment 4, and can also employ | adopt the flexible printed circuit board 40 of the shape etc. which were demonstrated in Embodiment 2. FIG. Further, at this time, as described in the second embodiment, the upper surface of the waterproof wall 20b of the lower housing 20 can be shaped to be dented.

(Embodiment 5)
Next, a foldable mobile phone device that is a mobile terminal device according to a fifth embodiment of the present invention will be described. The foldable mobile phone device according to the fifth embodiment of the present invention is characterized in that a slit is provided in a waterproof double-sided tape.

  In the foldable mobile phone device according to the fifth embodiment, parts not particularly mentioned are the same as those of the foldable mobile phone device according to the first embodiment. Moreover, the same code | symbol is attached | subjected to the same or corresponding part in a figure.

  FIG. 26 is a plan view of a pair of waterproof double-sided tapes in which the width of the portion covering the flexible printed wiring board (contact portion or sandwiching portion) is reduced and the slit is provided in the center in the width direction to reduce the area. The figure is shown. 27 (a) and 27 (b) show the shapes of waterproof double-sided tapes 95 and 96. FIG. The waterproof double-sided tapes 95 and 96 are narrowed like 95a and 96a, respectively, and slits 95b and 96b are provided in the center in the width direction to reduce the area. In addition, as shown in FIG. 28, the width of one waterproof double-sided tape 96 may be narrowed, a slit may be provided, and the other waterproof double-sided tape 97 may be formed in a wide band shape.

  In both cases, even when the repelling force or restoring force of the waterproof double-sided tape is large, a slit is provided in the waterproof double-sided tape covering the flexible printed wiring board 23, and the waterproof double-sided tape covering the flexible printed wiring board 23 is provided. The amount of the sticking area is reduced, so that the repelling force or restoring force of the waterproof double-sided tape is reduced and the waterproofness is increased.

  FIG. 29 shows a plan view of a pair of waterproof double-sided tapes when the width of the portion covering the flexible printed wiring board is widened and a slit is provided at the center in the width direction. 30 (a) and 30 (b) show the shapes of waterproof double-sided tapes 98 and 99. FIG. The waterproof double-sided tapes 98 and 99 are wide as 98a and 99a, respectively, and a slit 98b and 99b is provided in the center in the width direction. The number of slits may be one or more. In addition, as shown in FIG. 31, the width of one waterproof double-sided tape 99 may be widened, a slit may be provided, and the other waterproof double-sided tape 97 may be formed in a wide band shape.

  For both cases, even when the repelling force or restoring force of the waterproof double-sided tape is large, the width of the waterproof double-sided tape is widened, and the waterproof double-sided tape covering the flexible printed wiring board 23 is provided with a slit, The adhesive area of the waterproof double-sided tape covering the flexible printed wiring board 23 is shown by the width of the waterproof double-sided tape, while the repulsive force or restoring force of the waterproof double-sided tape is reduced to improve adhesion. Since it increases more than the case shown in FIG. 26 thru | or FIG. 28, waterproofness becomes still higher.

  29 to 31, when the width of the waterproof double-sided tape is widened and a slit is provided in the waterproof double-sided tape that covers the flexible printed wiring board 23, the width of the corresponding portion of the waterproof wall 20b. Also make it wide.

  In addition, it can replace with the flexible printed wiring board 23 of this Embodiment 5, and can also employ | adopt the flexible printed circuit board 40 of the shape etc. which were demonstrated in Embodiment 2. FIG. Further, at this time, as described in the second embodiment, the upper surface of the waterproof wall 20b of the lower housing 20 can be shaped to be dented.

(Embodiment 6)
Next, a foldable mobile phone device that is a mobile terminal device according to a sixth embodiment of the present invention will be described. The foldable mobile phone device according to the sixth embodiment of the present invention is characterized in that a foldable flexible printed wiring board is used.

  In the foldable mobile phone device according to the sixth embodiment, parts not particularly mentioned are the same as those of the foldable mobile phone device according to the first embodiment. Moreover, the same code | symbol is attached | subjected to the same or corresponding part in a figure.

  In the sixth embodiment of the present invention, as shown in FIG. 32, a bending type flexible printed wiring board 70 is used as the flexible printed wiring board. As shown in FIG. 32 (a), the right half portion 70a of the B-shaped portion of the flexible printed wiring board 70 having a B-shape is bent, and as shown in FIG. When overlapped with the left half portion 70b of the character portion, the overlapped portion becomes two apparent layers. However, the portion to which the waterproof double-sided tape is attached remains a single layer, and the gap can be made less likely to be formed on the side surface of the flexible printed wiring board by the thin portion. Moreover, as the thickness of the flexible printed wiring board is thin, a pair of waterproof double-sided tapes sandwiching the flexible printed wiring board is more closely attached and is difficult to peel off. Furthermore, although the flexible printed wiring board sandwiched between waterproof double-sided tapes is wide, the flexible printed wiring board passing through the hinge part is folded so that the width is reduced to about half. There is an effect that can be compatible.

  Note that a multilayer flexible printed wiring board can also be used as the flexible printed wiring board 70. Also in that case, the pair of waterproof double-sided tapes sandwiching the flexible printed wiring board 70 at the portion where the waterproof double-sided tape is stuck is more closely attached, and is difficult to peel off. Also in this case, the flexible printed wiring board sandwiched between the waterproof double-sided tapes is wide, but the flexible printed wiring board passing through the hinge portion is folded so that the width is reduced to about half. There is an effect that it is possible to make the part small. In any case, as for the width of the flexible printed wiring board, the width of the folded portion disposed inside the hinge portion is sandwiched between the first waterproof double-sided tape and the second waterproof double-sided tape. It becomes smaller than the width of the part.

  The flexible printed wiring board is bent between a portion sandwiched between the first waterproof double-sided tape and the second waterproof double-sided tape and a portion disposed inside the hinge portion.

  As described above, the foldable mobile phone device, which is the mobile terminal device of the sixth embodiment, has a flexible printed circuit board such as the waterproof double-sided tape 22, 24 even at the step portion where the thickness of the flexible printed wiring board 70 changes. It is possible to achieve both the electrical connection of the wiring and the reduction of the hinge portion 5 while the wiring board 70 is firmly adhered, the waterproof property is maintained, and the upper casing 4 is thinned.

  The flexible printed wiring board 70 according to the sixth embodiment is not limited to a single layer, but can be a flexible printed board having a multilayer structure as described in the second embodiment. Further, at this time, as described in the second embodiment, the upper surface of the waterproof wall 20b of the lower housing 20 can be shaped to be dented.

  Further, in the foldable mobile phone device of the sixth embodiment, the waterproof double-sided tape is not limited to the one described in the first embodiment, and the one described in the third, fourth, and fifth embodiments may be used. it can. The same applies to the corresponding part of the waterproof wall 20b of the lower housing 20.

  In the first to sixth embodiments, the waterproof housing 20b in the upper housing 4 is maintained while maintaining the waterproof property of the upper housing 4 of the foldable mobile phone device and reducing the thickness of the upper housing 4. The foldable mobile phone device capable of electrically connecting the electronic circuit in the space surrounded by the electronic circuit and the electronic circuit in the lower housing 2 has been described. The same applies to. Further, when the waterproof structure described in the first to sixth embodiments is applied to the lower housing 2, the battery lid (not shown) such as a battery lid (not shown) may be opened by a user during normal use. It is practically preferable to use a conventional rubber packing such as a ring for waterproofing and apply the waterproof structure described in the first to sixth embodiments to the other portions.

  Further, the foldable mobile phone device according to the first to sixth embodiments has been described as being a foldable mobile phone device. However, the waterproof structure in the upper housing 4 according to the first to fifth embodiments is a foldable mobile phone. In addition, the present invention can be applied to various mobile terminal devices such as mobile phones such as so-called slide-type mobile phone devices, mobile game devices, and mobile TV receivers.

  The present invention electrically connects an electronic circuit in a space surrounded by a waterproof wall in an enclosure and an electronic circuit in another enclosure while maintaining waterproofness and reducing the thickness of the enclosure. Therefore, it can be applied to a mobile terminal device such as a foldable mobile phone device.

1 is an external view of a foldable mobile phone device according to a first embodiment of the present invention. 1 is an external view of a foldable mobile phone device according to a first embodiment of the present invention. 1 is an exploded perspective view of an upper housing of a foldable mobile phone device according to a first embodiment of the present invention. 1 is a plan view of a flexible printed wiring board of a foldable mobile phone device according to a first embodiment of the present invention. Sectional drawing of the flexible printed wiring board of the foldable mobile telephone apparatus of Embodiment 1 of this invention (A) The figure which shows a state when a waterproof type double-sided tape is affixed on the flexible printed wiring board of Embodiment 1 of this invention (b) A waterproof type double-sided tape is attached to the flexible printed wiring board of Embodiment 1 of this invention. The figure which shows the state which affixed (c) The figure which shows the state which affixed the waterproof double-sided tape to the flexible printed wiring board of Embodiment 1 of this invention (d) The flexible printed wiring board of Embodiment 1 of this invention Figure showing a state where waterproof double-sided tape is attached to 1 is an exploded perspective view of an upper housing of a foldable mobile phone device according to a first embodiment of the present invention. 1 is an exploded perspective view of an upper housing of a foldable mobile phone device according to a first embodiment of the present invention. Plan view of flexible printed wiring board of foldable mobile phone device of embodiment 2 of the present invention (A) Cross-sectional view of the flexible printed wiring board of the foldable mobile phone device of the second embodiment of the present invention (b) Cross-sectional view of the flexible printed wiring board of the foldable mobile phone device of the second embodiment of the present invention (c) ) Cross-sectional view of flexible printed wiring board of foldable mobile phone device of embodiment 2 of the present invention (A) The figure which shows a state when a waterproof type double-sided tape is affixed on the flexible printed wiring board of Embodiment 2 of this invention (b) A waterproof type double-sided tape is attached to the flexible printed wiring board of Embodiment 2 of this invention. Figure showing the pasted state The disassembled perspective view of the upper housing | casing of the foldable mobile telephone apparatus of Embodiment 2 of this invention The exploded perspective view of the waterproof double-sided tape and flexible printed wiring board of Embodiment 3 of the present invention The perspective view when it affixes on the waterproof double-sided tape and flexible printed wiring board of Embodiment 3 of this invention Partial plan view when another waterproof double-sided tape of Embodiment 3 of the present invention is attached to a flexible printed wiring board (A) Plan view of one waterproof double-sided tape of Embodiment 3 of the present invention (b) Plan view of the other waterproof double-sided tape of Embodiment 3 of the present invention (A) Plan view of one waterproof double-sided tape of Embodiment 3 of the present invention (b) Plan view of the other waterproof double-sided tape of Embodiment 3 of the present invention 4 is an exploded perspective view of a waterproof double-sided tape and a flexible printed wiring board according to a fourth embodiment of the present invention. The perspective view when it affixes on the waterproof double-sided tape and flexible printed wiring board of Embodiment 4 of this invention The fragmentary top view when the other waterproof double-sided tape of Embodiment 4 of this invention is affixed on a flexible printed wiring board (A) Plan view of one waterproof double-sided tape according to Embodiment 4 of the present invention (b) Plan view of the other waterproof double-sided tape according to Embodiment 4 of the present invention (A) Plan view of one waterproof double-sided tape according to Embodiment 4 of the present invention (b) Plan view of the other waterproof double-sided tape according to Embodiment 4 of the present invention Partial top view when the waterproof double-sided tape provided with the triangular notch of Embodiment 4 of the present invention is attached to a flexible printed wiring board (A) Plan view of one waterproof double-sided tape provided with a triangular cutout according to Embodiment 4 of the present invention (b) The other waterproof double-sided tape provided with a triangular cutout according to Embodiment 4 of the present invention Top view of tape (A) Plan view of one waterproof double-sided tape provided with a triangular cutout according to Embodiment 4 of the present invention (b) The other waterproof double-sided tape provided with a triangular cutout according to Embodiment 4 of the present invention Plan view of tape (c) Partial plan view when waterproof double-sided tape provided with triangular notches according to Embodiment 4 of the present invention is attached to a flexible printed wiring board Partial plan view when waterproof double-sided tape provided with slits according to Embodiment 5 of the present invention is attached to a flexible printed wiring board (A) Plan view of one waterproof double-sided tape provided with slits according to Embodiment 5 of the present invention (b) Plan view of the other waterproof double-sided tape provided with slits according to Embodiment 5 of the present invention (A) Plan view of one waterproof double-sided tape provided with slits according to Embodiment 5 of the present invention (b) Plan view of the other waterproof double-sided tape according to Embodiment 5 of the present invention Partial plan view when another waterproof double-sided tape provided with a slit according to Embodiment 5 of the present invention is attached to a flexible printed wiring board (A) Plan view of one waterproof double-sided tape provided with slits according to Embodiment 5 of the present invention (b) Plan view of the other waterproof double-sided tape provided with slits according to Embodiment 5 of the present invention (A) Plan view of one waterproof double-sided tape provided with slits according to Embodiment 5 of the present invention (b) Plan view of the other waterproof double-sided tape according to Embodiment 5 of the present invention (A) Plan view of the flexible printed wiring board of the foldable mobile phone device of the sixth embodiment of the present invention (b) Plan view of the flexible printed wiring board of the foldable mobile phone device of the sixth embodiment of the present invention A perspective view of a flexible printed wiring board of a foldable mobile phone device according to a sixth embodiment of the present invention. A perspective view for explaining a waterproof structure of a conventional folding cellular phone device Sectional drawing explaining the waterproof structure of the conventional foldable mobile telephone apparatus

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Folding-type mobile telephone apparatus 1 Operation key 2 Lower housing | casing 3 Main display 4 Upper housing | casing 5 Hinge part 6 Sub display 20 Lower housing 20a Hollow protrusion 20b Waterproof wall 21 Display circuit board 21a Connector 22,24,52, 54, 55, 56, 57, 62, 64, 65, 66, 67, 68, 69, 92, 94, 95, 96, 97, 98, 99 Waterproof double-sided tape 23, 40, 70 Flexible printed wiring board 23a Terminal 23b Flexible thin wire 23c Resin sheet 25 Waterproof sheet 26 Upper housing

Claims (9)

A housing,
A waterproof wall surrounding a part or the whole of one surface of the housing;
A waterproof sheet that is attached to the upper surface of the waterproof wall and seals a space surrounded by the waterproof wall;
A set of waterproof double-sided tape for attaching the waterproof wall and the waterproof sheet;
A flexible wiring board electrically connected to an electronic circuit in a space surrounded by the waterproof wall,
The set of waterproof double-sided tapes includes a first waterproof double-sided tape and a second waterproof double-sided tape,
The flexible wiring board has a portion sandwiched between the first waterproof double-sided tape and the second waterproof double-sided tape,
Mobile terminal device. The first waterproof double-sided tape is attached to the upper surface of the waterproof wall,
The flexible wiring board is attached on the first waterproof double-sided tape,
The second waterproof double-sided tape is attached to the first waterproof double-sided tape and the flexible wiring board,
The waterproof sheet is attached to the upper surface of the second waterproof double-sided tape,
The space surrounded by the waterproof wall of the housing is sealed with the waterproof sheet,
The mobile terminal device according to claim 1. The flexible wiring board is a multilayer flexible wiring board,
In the multilayer flexible wiring board, the thickness of the multilayer flexible wiring board changes stepwise in the width direction at a portion sandwiched between the first waterproof double-sided tape and the second waterproof double-sided tape. Laminated on the
The portable terminal device according to claim 1 or 2. The flexible wiring board is a multilayer flexible wiring board,
In the multilayer flexible wiring board, in the portion sandwiched between the first waterproof double-sided tape and the second waterproof double-sided tape, the width of the uppermost layer or the lowermost layer is smaller than the width of the adjacent layer. The width other than the upper layer and the lowermost layer is larger than the width of at least one of the two adjacent layers,
The portable terminal device according to claim 1 or 2. Both or one of the first waterproof double-sided tape and the second waterproof double-sided tape is a portion of the flexible circuit board sandwiched between the first waterproof double-sided tape and the second waterproof double-sided tape. The width is larger than the width of the other parts,
The portable terminal device according to claim 1 or 2. Both or one of the first waterproof double-sided tape and the second waterproof double-sided tape is a portion of the flexible circuit board sandwiched between the first waterproof double-sided tape and the second waterproof double-sided tape. The width is smaller than the width of the other parts,
The portable terminal device according to claim 1 or 2. Both or one of the first waterproof double-sided tape and the second waterproof double-sided tape is provided at a portion sandwiching the flexible wiring board between the first waterproof double-sided tape and the second waterproof double-sided tape. With slits,
The portable terminal device according to claim 1 or 2. The flexible wiring board is bent between a portion sandwiched between the first waterproof double-sided tape and the second waterproof double-sided tape and a portion disposed inside the hinge portion, and the inside of the hinge portion. The width of the folded portion arranged in the first waterproof double-sided tape is smaller than the width of the portion sandwiched between the second waterproof double-sided tape,
The portable terminal device according to claim 1 or 2. A first housing;
A second housing;
A waterproof wall surrounding a part or the whole of one surface of the first casing;
A waterproof sheet that is attached to the upper surface of the waterproof wall and seals a space surrounded by the waterproof wall;
A set of waterproof double-sided tape for attaching the waterproof wall and the waterproof sheet;
A flexible wiring board that electrically connects the electronic circuit in the space surrounded by the waterproof wall of the first casing and the electronic circuit in the second casing;
The set of waterproof double-sided tapes includes a first waterproof double-sided tape and a second waterproof double-sided tape,
The flexible wiring board has a portion sandwiched between the first waterproof double-sided tape and the second waterproof double-sided tape,
Folding portable terminal device.

Images