JP5618390B2 - Flexible printed circuit board mounting structure and sliding electronic device - Google Patents

Description

  The present invention relates to a flexible printed circuit board mounting structure and a sliding electronic device, and more specifically, a flexible printed circuit board is compactly accommodated between sliding facing surfaces of an upper housing and a lower housing that slide along an inclined surface. The present invention relates to a flexible printed circuit board mounting structure and a sliding electronic device.

  In recent electronic devices, for example, there are devices in which a display unit and an operation unit are arranged in separate casings and the pair of casings are slidably coupled to each other. In this slide-type electronic device, the operation unit is hidden on the back side of the display unit when not in use, while the operation unit is exposed so that input operation can be performed when in use. Achieving compactness with restrictions.

  In this type of sliding electronic device, it is necessary to electrically connect circuit boards in a pair of sliding casings with flexible printed boards (FPC). This FPC is usually provided with a folded portion (folded portion) longer than the minimum length necessary for connecting the circuit boards in both housings, so that the relative relationship between the housings without disconnection can be achieved. It is mounted so that the connection state can be maintained following a typical sliding operation (see, for example, Patent Document 1).

  By the way, it is proposed that an electronic device including a display unit and an operation unit, particularly a portable electronic device such as a mobile phone, adopt a structure in which the operation unit and the display unit are continuous within a curved surface (for example, a patent). Reference 2). In this cellular phone, an unintentional input operation is restricted by adopting a structure in which an operation unit continuous with the display unit is opened and closed by sliding a cover.

WO2006 / 095382 JP 09-247252 A

  However, in the slide-type electronic device as described in Patent Document 1, as the size and thickness of the slide electronic device increase, the occupied volume of various components mounted inside tends to increase as the function increases. . Further, as shown in FIGS. 9 and 10, a mobile phone or the like in which a housing 101 including a display unit 101a and a housing 102 including an operation unit (not shown) are slidably connected via a slide mechanism. In the sliding electronic device 100, it is necessary to secure a space 120 for mounting the FPC 110 between the pair of housings 101 and 102 so as to extend at a certain height H in the sliding direction. However, in the slide-type electronic device 100, in order to reduce the size and thickness, in order to reduce the ratio of the height H of the mounting space 120 to the total thickness T, the folding portion 121 of the FPC 120 is not provided. If the bending radius is decreased (the curvature is increased), the durability of the FPC 120 associated with the sliding operation that opens and closes decreases, and the wire breaks.

  On the other hand, using the relative attitude of the display unit and the operation unit in the mobile phone described in Patent Document 2, for example, the display unit side housing that is slid with respect to the operation unit side housing. If the posture is tilted in the direction to get up, useless space will be created. That is, since the facing surface facing the mating side of the casing that houses the circuit board is curved, the curved space is required.

  That is, in an electronic device having a mechanism that slides a pair of housings in a bending direction, it is necessary to secure a sufficient FPC mounting space and a space for sliding in the bending direction with respect to the other side. As a result, the overall thickness tends to increase.

  The present invention has been made in view of the above-described circumstances, and can flexibly slide a pair of casings in a relatively oblique direction while avoiding a significant increase in the thickness of the device. An object of the present invention is to provide a printed circuit board mounting structure and a sliding electronic device.

In order to solve the above-described problems, the configuration of the present invention is such that the first casing and the second casing, which are mechanically coupled to each other so as to be slidable, are folded between the slide facing surfaces of both casings. The height of the side wall surface constituting at least one of the first and second housings according to the mounting structure of the flexible printed circuit board that is also electrically connected by the passed flexible printed circuit board but along said slidable direction, an inclined angle constant configuration changes obliquely inclined at a predetermined increase rate or decrease rate, and one of the first and second housing, at least one of The slide facing surface of the housing has a concave space for absorbing a change in curvature and position of the return of the flexible printed circuit board due to a sliding operation between the first housing and the second housing. provided, the side wall As the height of the concave portion increases, the depth of the concave space portion increases at a constant increase rate, while as the height of the side wall surface decreases, the depth of the concave space portion decreases at a constant decrease rate. As the slide opening operation proceeds between the first housing and the second housing, the folding environment in the concave space portion gradually expands in the height direction, while the slide closing operation As the slide opening operation proceeds, the folding environment gradually narrows in the height direction.As the slide opening operation proceeds, the flexible environment gradually decreases in size, and as the slide closing operation proceeds, the flexible environment gradually increases. The printed circuit board is folded back.

According to the configuration of the present invention, the height of the side wall surface of the flexible printed circuit board is changed to an oblique inclination at a constant ascending rate or descending rate along the slidable direction. It is possible to change the appearance (change in the curvature and position of the turn) associated with the sliding operation in the concave space portion on the opposite surface. Therefore, it is not necessary to separately prepare a space for changing the height of the side wall surface and a space for absorbing a change in the appearance accompanying the sliding operation of the flexible printed circuit board, and the thickness of the device is reduced. It is possible to realize a reduction in size and thickness while avoiding a necessary increase in thickness.

It is a perspective view which shows the mobile telephone which is a portable electronic device provided with the slide mechanism which concerns on the 1st reference example of this invention. It is a disassembled perspective view which shows the structure of the upper housing | casing and the lower housing | casing of the mobile phone. It is a perspective view which shows the structure of the upper housing | casing of the same mobile phone. It is a figure explaining the slide of the mobile phone, (a) is a side perspective view showing a state before the slide, (b) is a side perspective view showing a state after the slide. It is a perspective view which shows the mobile telephone which is a portable electronic device provided with the slide mechanism which concerns on 1st Embodiment of this invention. It is a figure explaining the slide of the mobile phone, (a) is a side perspective view showing a state before the slide, (b) is a side perspective view showing a state after the slide. It is a perspective view which shows the mobile telephone which is a portable electronic device provided with the slide mechanism which concerns on 2nd Embodiment of this invention. It is a figure explaining the slide of the mobile phone, (a) is a side perspective view showing a state before the slide, (b) is a side perspective view showing a state after the slide. It is a perspective view which shows a mobile telephone provided with the slide mechanism of related technology. It is a figure explaining the slide of the mobile phone, (a) is a side perspective view showing a state before the slide, (b) is a side perspective view showing a state after the slide.

In order to realize the mounting structure of the flexible printed circuit board, the curvature and position of the return of the flexible printed circuit board that accompanies the sliding operation of the first and second housings on the slide facing surface of at least one of the housings A concave space for absorbing the change is provided.
Hereinafter, embodiments of the present invention will be described in detail with reference examples with reference to the drawings.

Reference example

  FIG. 1 to FIG. 4 are diagrams showing an example of a mobile phone which is a sliding electronic device having a flexible printed circuit board mounting structure according to a reference example of the present invention. FIG. 1 is a perspective view showing the appearance of the mobile phone, FIG. 2 is a perspective view of the first and second housings constituting the mobile phone, and is an oblique perspective view from above, and FIG. 3 shows the first housing. FIG. 4 is a side perspective view showing the FPC that connects the circuit boards during the sliding operation of the first and second casings.

  In FIG. 1, the cellular phone 10 can be stacked in a thin rectangular parallelepiped shape by connecting an upper unit 11 and a lower unit 21 with a flexible printed circuit board (hereinafter simply referred to as FPC) 31 shown in FIG. Has been built. In the mobile phone 10, the lower surface 12 b of the upper housing 12 of the upper unit 11 facing each other and the upper surface 22 a of the lower housing 22 of the lower unit 21 are slidably connected in the longitudinal direction while facing each other. In the upper unit 11, a display unit 11 a that displays and outputs various types of information is disposed on the substantially entire surface of the upper surface 12 a of the upper housing 12. The lower unit 21 is provided with an operation unit 21a (see FIG. 2) for inputting various information in a region of the upper surface 22a of the lower housing 22 exposed after the upper unit 11 is slid. Here, the cellular phone 10 can open / close the operation unit 21a so as to be operable / impossible by sliding the upper unit 11 and the lower unit 21 relative to each other in the longitudinal direction. The configuration of each part will be described as the front end side or the rear end side with reference to the relative slide opening operation direction of 22 (the same applies to the embodiments described below).

  In the upper unit 11, the height of the side surface (side wall portion) 12c of the upper housing 12 changes in a curved shape in a slidable direction (hereinafter also simply referred to as a sliding direction), and the lower surface 12b is in the longitudinal direction of the rectangular parallelepiped shape. It curves and protrudes into a convex shape. On the other hand, in the lower unit 21, similarly, the height of the side surface (side wall portion) 22c of the lower housing 22 changes in a curved shape in the sliding direction, and the upper surface 22a curves in the longitudinal direction of the rectangular parallelepiped shape to become a concave shape. It is depressed. The lower surface 12b and the upper surface 22a are formed in a similar cross-sectional shape so that they can face each other in a state of being close to each other. As shown in FIG. 2, the lower casing 22 is formed with hand-shaped protruding rails 23 having a key-shaped cross section along both longitudinal sides of the upper surface 22a. It extends to the rear end side in about half the length of the direction. On the other hand, as shown in FIG. 3, the upper housing 12 is formed with a key-shaped groove rail 13 having a cross section along the both sides in the longitudinal direction of the lower surface 12b. The groove rail 13 is formed on the lower surface 12b. It extends with a length of about the entire length in the longitudinal direction. The groove rails 13 and the projecting rails 23 have similar cross-sectional shapes so that they can be slidably fitted and engaged.

  Thereby, the cellular phone 10 is in a state in which the lower surface 12b of the upper housing 12 is close to the upper surface 22a of the lower housing 22 as shown in FIG. 4 by fitting the protruding rail 23 into the groove rail 13. Can be slid relative to each other in the bending direction of the longitudinal direction. That is, the groove rail 13 and the protruding rail 23 constitute a slide mechanism, and the lower surface 12b of the upper housing 12 and the upper surface 22a of the lower housing 22 constitute a slide facing surface. When the upper unit 11 and the lower unit 21 are slid relative to each other in the opening direction, the operation portion 21a on the distal end side without the protruding rail 23 on the upper surface 22a of the lower housing 22 is moved to the upper housing 12. It can expose so that input operation is possible from the state which is confronting and hidden in the lower surface 12b. At this time, the lower surface 12b of the upper housing 12 that curves into the convex shape can slide along the upper surface 22a of the lower housing 22 that curves into the concave shape, and the display portion 11a on the upper surface 12a can be raised. In other words, the display unit 11a on the upper housing 12 side is in a state of being raised with respect to the operation unit 21a on the upper surface 22a side of the lower housing 22 and is in a plane extending the operation surface of the operation unit 21a. As a result, the facing angle of the display unit 11a facing the user can be increased, and the visibility of the display unit 11a can be improved.

  2 and 3, the upper unit 11 and the lower unit 21 are folded back from the outlets 16 and 26 that open to the lower surface 12b of the upper housing 12 and the upper surface 22a of the lower housing 22, respectively. The FPC 31 is inserted into the interior to electrically connect the circuit boards 14 and 24 (see FIG. 4). That is, the FPC 31 is pulled out (through) from the outlets 16 and 26 opened in the lower surface 12b of the upper housing 12 and the upper surface 22a of the lower housing 22, and the folded portion 31a is positioned between the slide facing surfaces. Thus, the upper unit 11 and the lower unit 21 can be slid in the longitudinal direction.

  Specifically, in the upper unit 11, a concave space portion 15 is formed over substantially the entire length from the vicinity of the front end side in the longitudinal direction to the vicinity of the rear end side of the lower surface 12 b curved in a convex shape of the upper housing 12. The concave space portion 15 has a bottom surface 15a parallel to the circuit board 14 and the top surface 12a and is formed in a hollow shape wider than the FPC 31, and an outlet 16 of the FPC 31 is opened on the rear end side. . On the other hand, in the lower unit 21, a concave space portion 25 is formed from the vicinity of the rear end side in the longitudinal direction of the upper surface 22a curved in a concave shape of the lower housing 22 to the vicinity of the lowest surface near the center of the concave shape. The recessed space portion 25 has a bottom surface 25a parallel to the circuit board 24 and the lower surface 22b, and is formed in a hollow shape wider than the FPC 31, and an outlet 26 of the FPC 31 opens on the front end side (front side). doing. That is, the outlet 16 of the upper housing 12 and the outlet 26 of the lower housing 22 are externally exposed even when the upper unit 11 is overlapped with the lower unit 21 or when the upper unit 11 is slid to the maximum. It forms in the edge part of the concave space parts 15 and 25 so that it may not expose. Further, the outlet 26 of the lower housing 22 is formed so as to open at a position facing the outlet 16 of the upper housing 12 in the opened state slid to the maximum.

  On the other hand, the FPC 31 is pulled out from the outlet 16 that opens to the rear end side of the concave space portion 15 of the upper housing 12 on the upper unit 11 side, and then faces the lower housing 22 facing the front end side of the concave space portion 15. It extends to the front end side of the concave space portion 25 (up to near the center). On the other hand, the FPC 31 on the lower unit 21 side extends to the rear end side after being pulled out from the outlet 26 that opens to the front end side of the concave space 25 of the lower housing 22. The FPC 31 extends in the same direction at the front end side of the concave space portion 15 on the upper unit 11 side and the rear end side of the concave space portion 25 on the lower unit 21 side, thereby forming a folded portion 31a. Has been.

  For this reason, as shown in FIG. 4A, when the FPC 31 is in the closed state in which the upper unit 11 and the lower unit 21 are overlapped, the folded portion 31a is located near the rear end side of the outlet 26 of the recessed space portion 25. It is located and accommodated in a space formed between the concave space 15. That is, when the FPC 31 is substantially positioned in the concave space portion 15 of the upper housing 12, the folded portion 31a is curved with a curvature having no burden so as to be within the maximum distance L1 between the bottom surface 15a and the bottom surface 12b. The dimensions are set.

  When the upper unit 11 is slid to the lower unit 21 to the maximum, the folded portion 31a of the FPC 31 is moved from the vicinity of the outlet 26 of the concave space portion 25 as shown in FIG. It moves to the rear end side and is accommodated in a space formed between the concave space portion 15. That is, as the outlet 16 of the upper housing 12 slides to the front end side (close to the outlet 26 of the lower housing 22), the FPC 31 between the outlets 16 and 26 forms the folded portion 31a. By changing the position and being positioned on the rear end side in the recessed space portion 15 corresponding to the vicinity of the center of the recessed space portion 25, the dimensions are set so as not to be exposed to the outside.

  Accordingly, when the FPC 31 is in the open state in which the operation unit 21a is exposed by sliding the upper unit 11 with respect to the lower unit 21, the FPC 31 is placed in the recessed spaces 15 and 25 of both the upper housing 12 and the lower housing 22. By being positioned, it is within a distance L2 obtained by adding the space on the concave space 25 side to the distance L1 when the upper unit 11 and the lower unit 21 are overlapped. For this reason, when the FPC 31 is used by sliding the upper unit 11 with respect to the lower unit 21, the circuit board 14, 24 is deformed by gently bending the folded portion 31a with a curvature that becomes a smaller load. The connection state of can be maintained. Further, since the FPC 31 is within the distance L3 that is shorter than the slide distance L4 of the upper unit 11, a large exposed area on the tip side of the lower unit 21 can be secured, and a large area of the operation unit 21a can be secured. .

  Further, the FPC 31 moves and deforms the folded portion 31a outside the outlets 16 and 26 of the upper casing 12 and the lower casing 22 (it is not necessary to enter and exit at the outlets 16 and 26). Other than the outlets 16 and 26 of the upper casing 12 and the lower casing 22 can be sealed, and the outlets 16 and 26 can be closed, and the dust resistance can be improved.

  As described above, according to this reference example, each of the lower surface 12b of the upper housing 12 and the upper surface 22a of the lower housing 22 which are the slide opposing surfaces of the upper unit 11 and the lower unit 21 that are relatively slid in the bending direction. The recessed space portions 15 and 25 can be formed in the inner space to accommodate the folded portion 31 a of the FPC 31. For this reason, the space between the lower surface 12b and the upper surface 22a and the circuit boards 14 and 24 is effectively used without making it a dead space, and the mounting space (intervals L1 and L2) necessary for the durability of the FPC 31 is not provided separately. Can be secured. Therefore, even when adopting a structure that allows the upper unit 11 to be slid in a bending direction with respect to the lower unit 21 so that a user who performs an input operation on the operation unit 21a can easily view the display unit 11a, It is possible to achieve a reduction in size and thickness by avoiding an unnecessary increase in the thickness of the device.

Embodiment 1

  Next, FIG. 5 and FIG. 6 are diagrams showing an example of a mobile phone which is a slide type electronic device including the flexible printed circuit board mounting structure according to the first embodiment of the present invention. FIG. 5 is a perspective view showing the appearance of the mobile phone, and FIG. 6 is a side perspective view showing the FPC that connects the circuit boards during the sliding operation of the first and second housings. Here, since this embodiment is configured in substantially the same manner as the above-described reference example, the same reference numeral is given to the same configuration, and the characteristic part will be described (also in other embodiments described below). The same).

  5 and 6, the cellular phone 40 can be stacked in a thin box shape whose upper surface is inclined obliquely by connecting the upper unit 41 and the lower unit 51 with the FPC 31 as in the above-described reference example. Has been built. In the cellular phone 40, the lower surface 42b of the upper housing 42 of the upper unit 41 and the upper surface 52a of the lower housing 52 of the lower unit 51 that are facing each other are slidably connected in the longitudinal direction while facing each other. The upper unit 41 is provided with a display unit 11a that displays and outputs various types of information on the substantially entire upper surface 42a of the upper housing 42. The lower unit 51 is provided with an operation unit (not shown) for inputting various information in the region of the upper surface 52a of the lower housing 52 exposed after the upper unit 41 is slid.

In the lower unit 51, the height of the side surface (side wall portion) 52c of the lower housing 52 changes obliquely at a constant rising rate or falling rate along the sliding direction, and the upper surface 52a rises toward the rear end side. So that it is slanted. In the upper unit 41, the upper surface 42a and the lower surface 42b of the upper housing 42 are inclined obliquely in parallel with the upper surface 52a of the lower housing 52, and the lower surface 42b of the upper housing 42 and the upper surface 52a of the lower housing 52 are They face each other in close proximity. On the lower surface 42b of the upper housing 42 and the upper surface 52a of the lower housing 52, as in the above-described reference example, a hand-shaped groove rail having a key-shaped cross section and a protruding rail are formed. The lower surface 42b and the upper surface 52a of each other can be relatively slid in the longitudinal direction (obliquely inclined direction) while maintaining a state in which they face each other. That is, when the upper unit 41 and the lower unit 51 are slid relative to each other in the opening direction from the closed state, the operation unit on the upper surface 52a of the lower housing 52 is hidden facing the lower surface 42b of the upper housing 42. Can be exposed so that input operation can be performed. Further, at this time, the display unit 11a on the upper housing 42 side can increase the facing angle of the display unit 11a facing the user as compared with the case of sliding in the horizontal direction, thereby improving the visibility of the display unit 11a. Can be made.

  Further, in the upper unit 41, a concave space 45 is formed over substantially the entire length from the vicinity of the front end side in the longitudinal direction of the lower surface 42b of the upper housing 42 to the vicinity of the rear end side. The recessed space 45 has a bottom surface 45a parallel to the circuit board 14 and the upper surface 42a, and is formed in a recessed shape with a depth that can accommodate the FPC 31, and an outlet 46 of the FPC 31 opens on the rear end side. ing. On the other hand, in the lower unit 51, a concave space 55 is formed from the vicinity of the rear end side in the longitudinal direction of the upper surface 52a of the lower housing 52 to the vicinity of the center. The concave space portion 55 has a certain depth from the front end side and has a bottom surface 55a parallel to the circuit board 24 and the lower surface 52b, and is formed in a hollow shape wider than the FPC 31, and this front end side (front side) The outlet 56 of the FPC 31 is open. In other words, the outlet 46 of the upper casing 42 and the outlet 56 of the lower casing 52 are externally exposed even when the upper unit 41 is overlapped with the lower unit 51 or when the upper unit 41 is slid to the maximum. It is formed in the edge part of the recessed space parts 45 and 55 so that it may not expose. Further, the outlet 56 of the lower housing 52 is formed so as to open at a position facing the outlet 46 of the upper housing 42 in the opened state in which it is slid to the maximum.

  On the other hand, the FPC 31 is pulled out from the outlet 46 that opens to the rear end side of the concave space portion 45 of the upper housing 42 on the upper unit 41 side, and then faces the lower housing 52 facing the front end side of the concave space portion 45. It extends to the tip side of the concave space 55 (up to the vicinity of the center or more). On the other hand, the FPC 31 on the lower unit 51 side extends to the rear end side after being pulled out from the outlet 56 that opens to the front end side of the concave space 55 of the lower housing 52. The FPC 31 extends in the same direction at the front end side of the concave space portion 45 on the upper unit 41 side and the rear end side of the concave space portion 55 on the lower unit 51 side, thereby forming a folded portion 31a. Has been.

  For this reason, as shown in FIG. 6A, when the upper unit 41 and the lower unit 51 are overlapped, the FPC 31 has the folded portion 31a in the vicinity of the rear end side of the outlet 56 of the recessed space portion 55. It is located and stored in the concave space 55. That is, since the folded portion 31a of the FPC 31 is located in the vicinity of the rear end side of the outlet 56 of the recessed space portion 55, the folded portion 31a is formed deeper from the front end side of the recessed space portion 55 than the reference example described above. The size is set so that the portion 31a can be curved and accommodated with a curvature with no burden.

  Further, when the upper unit 41 is slid to the maximum with respect to the lower unit 51, the folded portion 31a of the FPC 31 starts from the vicinity of the outlet 56 of the concave space portion 55 as shown in FIG. It moves to the rear end side and is stored in the concave space 55. That is, as the outlet 46 of the upper casing 42 slides toward the tip side (close to the outlet 56 of the lower casing 52), the FPC 31 between the outlets 46 and 56 forms the folded portion 31a. By changing the position and being positioned on the rear end side in the concave space 55 that is deepest from the obliquely inclined upper surface 52a, the dimension is set so that it is gently curved with a less burdensome curvature and is not exposed to the outside. ing.

  As described above, according to this embodiment, the FPC 31 is placed in the recessed space portion 55 formed in the upper surface 52a serving as the slide facing surface of the lower housing 52 on the lower unit 51 side that is relatively slid in the obliquely inclined direction. The folded portion 31a can be accommodated. Therefore, the space between the upper surface 52a and the circuit board 24 can be effectively used without making it a dead space, and can be secured without providing a separate mounting space necessary for the durability of the FPC 31. Therefore, even when a structure is adopted in which the upper unit 41 is slidable in a direction inclined obliquely with respect to the horizontal direction so that the user who performs an input operation on the operation unit can easily see the display unit 11a, Therefore, it is possible to reduce the size and thickness by avoiding the thickness of the film from becoming unnecessarily thick.

Embodiment 2

  Next, FIG. 7 and FIG. 8 are diagrams showing an example of a mobile phone which is a slide type electronic device provided with a flexible printed circuit board mounting structure according to the second embodiment of the present invention. FIG. 7 is a perspective view showing the appearance of the mobile phone, and FIG. 8 is a side perspective view showing the FPC that connects the circuit boards during the sliding operation of the first and second housings.

  7 and 8, the mobile phone 60 is constructed so that the upper unit 61 and the lower unit 71 are connected by the FPC 31 and can be stacked in a thin rectangular parallelepiped shape, as in the above-described reference example. . In the cellular phone 60, the lower surface 62b of the upper housing 62 of the upper unit 61 and the upper surface 72a of the lower housing 72 of the lower unit 71 that are facing each other are slidably connected in the longitudinal direction while facing each other. The upper unit 61 is provided with a display unit 11 a that displays and outputs various types of information on the substantially entire surface of the upper surface 62 a of the upper housing 62. The lower unit 71 is provided with an operation unit (not shown) for inputting various information in an area of the upper surface 72a of the lower housing 72 exposed after the upper unit 61 is slid.

In the lower unit 71, the height of the side surface (side wall portion) 72c of the lower housing 72 changes obliquely at a constant rising rate or descending rate along the sliding direction, and the upper surface 72a rises toward the rear end side. So that it is slanted. Similarly, in the upper unit 61, the height of the side surface (side wall portion) 62c of the upper casing 62 changes obliquely at a constant rising rate or falling rate along the sliding direction, and the lower surface 62a is on the rear end side. It is slanted so as to descend. The lower surface 62b and the upper surface 72a face each other while being close to each other. On the lower surface 62b of the upper housing 62 and the upper surface 72a of the lower housing 72, as in the above-described reference example, a hand-shaped groove rail with a key-shaped cross section and a projecting rail are omitted. The lower surface 62b and the upper surface 72a of each other can be relatively slid in the longitudinal direction (obliquely inclined direction) while maintaining the state of facing each other. That is, when the upper unit 61 and the lower unit 71 are slid relative to each other in the opening direction from the closed state, the operation unit on the upper surface 72a of the lower housing 72 is hidden facing the lower surface 62b of the upper housing 62. Can be exposed so that input operation can be performed.

  Further, in the upper unit 61, a concave space portion 65 is formed over substantially the entire length from the vicinity of the front end side in the longitudinal direction of the lower surface 62 b of the upper housing 62 to the vicinity of the rear end side. The recessed space portion 65 has a bottom surface 65a parallel to the circuit board 14 and the upper surface 62a, and is formed in a hollow shape wider than the FPC 31, and an outlet 66 of the FPC 31 opens on the rear end side. . On the other hand, in the lower unit 71, a concave space 75 is formed from the vicinity of the rear end side in the longitudinal direction of the upper surface 72a of the lower housing 72 to the vicinity of the center. The concave space portion 75 has a bottom surface 75a parallel to the circuit board 24 and the lower surface 72b, and is formed in a hollow shape wider than the FPC 31, and an outlet 76 of the FPC 31 opens on the front end side (front side). doing. In other words, the outlet 66 of the upper housing 62 and the outlet 76 of the lower housing 72 are externally exposed even when the upper unit 61 is overlapped with the lower unit 71 or when the upper unit 61 is slid to the maximum. It forms in the edge part of the concave space parts 65 and 75 so that it may not expose. In addition, the outlet 76 of the lower housing 72 is formed so as to open at a position facing the outlet 66 of the upper housing 62 in the open state in which it is slid to the maximum.

  On the other hand, the FPC 31 is pulled out from the outlet 66 that opens to the rear end side of the concave space 65 of the upper housing 62 on the upper unit 61 side, and then faces the lower housing 72 facing the front end side of the concave space 65. It extends to the tip side of the concave space 75 (up to the vicinity of the center). On the other hand, the FPC 31 on the lower unit 71 side extends to the rear end side after being pulled out from the outlet 76 opened to the front end side of the concave space 75 of the lower casing 72. The FPC 31 extends in the same direction between the front end side of the concave space portion 65 on the upper unit 61 side and the rear end side of the concave space portion 75 on the lower unit 71 side, thereby forming a folded portion 31a. Has been.

  For this reason, as shown in FIG. 8A, when the FPC 31 is in the closed state in which the upper unit 61 and the lower unit 71 are overlapped, the folded portion 31a is located near the rear end side of the outlet 76 of the recessed space portion 75. It is located and accommodated in a space formed between the concave space portion 65. That is, the size is set so that the folded portion 31a of the FPC 31 is located at a middle depth in the concave space 65 of the upper housing 62 and is curved and accommodated with a curvature with no burden.

  When the upper unit 61 is slid to the lower unit 71 to the maximum, the folded portion 31a of the FPC 31 is moved from the vicinity of the outlet 76 of the concave space 75 as shown in FIG. It moves to the rear end side and is accommodated in a space formed between the concave space portion 65. That is, as the outlet 66 of the upper casing 62 slides toward the tip side (close to the outlet 76 of the lower casing 72), the FPC 31 between the outlets 66 and 76 forms the folded portion 31a. By changing the position to be positioned at the deepest rear end side in the concave space 75, the dimensions are set so that the curve is gently curved with a less burdensome curvature and is not exposed to the outside.

  As described above, according to this embodiment, the lower surface 62b of the upper housing 62 and the upper surface 72a of the lower housing 72, which are the slide opposing surfaces of the upper unit 61 and the lower unit 71 that are relatively slid in the obliquely inclined direction, are provided. Recessed space portions 65 and 75 are formed in each of them, and the folded portion 31a of the FPC 31 can be accommodated. For this reason, the space between the lower surface 62b and the upper surface 72a and the circuit boards 14 and 24 can be effectively utilized without making it a dead space, and a mounting space necessary for the durability of the FPC 31 can be secured. Therefore, even when adopting a structure in which the upper unit 61 is slidable in an obliquely inclined direction with respect to the lower unit 71, it is possible to reduce the size and thickness by avoiding an unnecessary increase in the thickness of the device. Can be realized.

  Here, in the above-described embodiment, an example in which the concave space portion for storing the FPC is formed on both the upper housing and the opposing surfaces of the lower housing at a depth of at least the thickness of the FPC. However, the present invention is not limited to this, and it goes without saying that the concave space portion may be formed only on one side when a necessary space can be secured. For example, the depth of the concave space 45 in the first embodiment described above may be eliminated.

  In the above-described embodiment, the case of sliding in the longitudinal direction of the upper housing and the lower housing is described as an example. However, the present invention is not limited to this. For example, the rotation is relatively performed with one end side as a rotation fulcrum. Even in the case of moving, the present invention can also be applied when the relatively rotating surface is inclined.

  The present invention is not limited to mobile phones and can be widely applied to electronic devices having a slide mechanism, for example, portable electronic terminals such as notebook personal computers, PDAs (personal digital assistants), digital cameras, and digital video cameras.

10, 40, 60 Mobile phone (portable electronic device)
11a Display unit 12, 42, 62 Upper housing (first housing)
12b, 42b, 62b Lower surface (slide facing surface)
12c, 22c, 52c, 62c, 72c Side (side wall)
13 Groove rail 14, 24 Circuit board 15, 25, 45, 55, 65, 75 Recessed space 16, 26, 46, 56, 66, 76 Drawer 21a Operation part 22, 52, 72 Lower housing (second Housing)
22a, 52a, 72a Upper surface (slide facing surface)
23 Protruding rail 31 Flexible printed circuit board (FPC)
31a Folding part

Claims (8)

The first casing and the second casing, which are mechanically coupled to each other so as to be slidable with each other, are also electrically connected by a flexible printed circuit board that is folded between the slide facing surfaces of both casings. The flexible printed circuit board mounting structure,
One of the first and second housings, the inclination height of the side wall surface which forms at least one housing, wherein along the slidable direction, which changes obliquely inclined at a predetermined increase rate or decrease rate It has a constant angle configuration, and
One of the first and second housing, wherein at least one the said slide facing surface of the housing, the flexible printed circuit board caused by sliding motion between said second housing and the first housing A concave space is provided to absorb the curvature and position change of the folding,
As the height of the side wall surface increases, the depth of the concave space portion increases at a constant increase rate, while as the height of the side wall surface decreases, the depth of the concave space portion decreases constantly. It is configured to decrease at a rate,
As the slide opening operation proceeds between the first housing and the second housing, the folding environment in the concave space portion gradually expands in the height direction, while the folding environment advances as the slide closing operation proceeds. Is configured to gradually narrow in the height direction,
A mounting structure for a flexible printed circuit board, wherein the flexible printed circuit board is folded back with a gradually smaller curvature as the slide opening operation proceeds, and with a gradually larger curvature as the slide closing operation proceeds.   The pull-out port for drawing out the flexible printed circuit board between the slide facing surfaces of the first and second housings accommodates the entire flexible printed circuit board in a region facing even in the maximum open slide state of the slide facing surface. The flexible printed circuit board mounting structure according to claim 1, wherein the structure is open at a position.   The outlet through which the flexible printed circuit board is drawn out between the slide facing surfaces of the first and second housings is located behind the sliding opening direction of the slide facing surface in at least one of the concave space portions of the slide facing surface. 3. The flexible print according to claim 1, wherein the flexible print has an opening at an end portion, and the other slide-facing surface is opened further forward than a rear end portion in the slide opening operation direction of the slide-facing surface. PCB mounting structure. The concave space portion extends from the rear end portion in the slide opening operation direction of the slide facing surface of the slide facing surface of the first housing to at least the vicinity of the center, and the rear end portion in the concave space portion While pulling out and storing the flexible printed circuit board from the first outlet opening in the
The second outlet for pulling out the flexible printed circuit board of the second casing opens at a position facing the first outlet in the maximum open slide state,
The flexible printed circuit board drawn out from the first and second outlets and folded back at the center of the concave space is housed between the slide facing surfaces. 3. The flexible printed circuit board mounting structure according to 3. A first housing and a second housing that are mechanically coupled to each other so as to be slidable, and a flexible printed circuit board that is folded between the slide facing surfaces of the first and second housings. A sliding electronic device,
One of the first and second housings, the inclination height of the side wall surface which forms at least one housing, wherein along the slidable direction, which changes obliquely inclined at a predetermined increase rate or decrease rate It has a constant angle configuration, and
One of the first and second housing, wherein at least one the said slide facing surface of the housing, the flexible printed circuit board caused by sliding motion between said second housing and the first housing A concave space is provided to absorb changes in curvature and position of the folding;
As the height of the side wall surface increases, the depth of the concave space portion increases at a constant increase rate, while as the height of the side wall surface decreases, the depth of the concave space portion decreases constantly. It is configured to decrease at a rate,
As the slide opening operation proceeds between the first housing and the second housing, the folding environment in the concave space portion gradually expands in the height direction, while the folding environment advances as the slide closing operation proceeds. Is configured to gradually narrow in the height direction,
The sliding electronic device is characterized in that the flexible printed circuit board is folded back with a gradually decreasing curvature as the sliding opening operation proceeds and with a gradually increasing curvature as the sliding closing operation proceeds.   The pull-out port for drawing out the flexible printed circuit board between the slide facing surfaces of the first and second housings accommodates the entire flexible printed circuit board in a region facing even in the maximum open slide state of the slide facing surface. 6. The sliding electronic device according to claim 5, wherein the sliding electronic device opens at a position.   The outlet through which the flexible printed circuit board is drawn out between the slide facing surfaces of the first and second housings is located behind the sliding opening direction of the slide facing surface in at least one of the concave space portions of the slide facing surface. 7. The slide type according to claim 5, wherein the slide-type opening surface is open at an end portion, and the other slide-facing surface is opened further forward than the rear end portion in the slide opening operation direction of the slide-facing surface. Electronics. The concave space portion extends from the rear end portion in the slide opening operation direction of the slide facing surface of the slide facing surface of the first housing to at least the vicinity of the center, and the rear end portion in the concave space portion While pulling out and storing the flexible printed circuit board from the first outlet opening in the
The second outlet for pulling out the flexible printed circuit board of the second casing opens at a position facing the first outlet in the maximum open slide state,
The flexible printed circuit board drawn out from the first and second outlets and folded back on the center side of the concave space is housed between the slide facing surfaces. 7. The sliding electronic device according to 7.

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