JP4362654B2 - Flexible substrate holding structure and electronic device - Google Patents

Description

  The present invention relates to a flexible substrate holding structure that holds a flexible substrate in a hinge portion that rotatably connects a first housing and a second housing, and also relates to an electronic device having the flexible substrate holding structure.

  In recent years, as represented by a foldable mobile phone, a foldable electronic device in which two casings are rotatably connected by a hinge portion has been widely used. In such a foldable electronic device, a circuit in one housing and a circuit in the other housing are electrically connected by a flexible substrate, and this flexible substrate is accommodated in a hinge portion (for example, a patent) Reference 1).

FIG. 16 shows a schematic diagram of a conventional folding mobile phone. The upper hinge frame 301 is rotatably connected to the lower hinge frame 302, the upper hinge frame 301 is fixed to the display side housing in the display side housing, and the lower hinge frame 302 is operated to the operation side housing in the operation side housing 303. The connecting portion between the upper hinge frame 301 and the lower hinge frame 302 is covered with a hinge cover. A flexible substrate 304 is accommodated in the hinge cover in a spirally wound state. One end of the flexible substrate 304 is connected to the circuit in the operation-side casing 303, and the other end of the flexible substrate 304 is connected to the circuit in the display-side casing. The flexible substrate 304 is not held anywhere except for the portion connected to the circuit. In FIG. 16, the front cover, the display-side housing, and the hinge cover of the operation-side housing 303 are not shown.
JP 2002-51132 A

  By the way, when an impact is unexpectedly given to the foldable electronic device due to dropping or the like, the hinge portion is likely to be damaged, so the strength of the hinge portion needs to be increased. Also in the folding cellular phone shown in FIG. 16, it is necessary to increase the strength of the upper hinge frame 301 and the lower hinge frame 302.

  Further, for the purpose of protecting the flexible substrate 304 and reinforcing the upper hinge frame 301 and the lower hinge frame 302, etc., these are covered with a hinge cover. There is a risk of rubbing against. Further, the flexible substrate 304 may rub against the upper hinge frame 301 or the lower hinge frame 302. There is a problem that the opening / closing operation of the folding cellular phone becomes heavy due to rubbing of the flexible substrate 304.

  Then, an object of this invention is to provide the flexible substrate holding structure which can suppress the abrasion of a flexible substrate, ensuring the intensity | strength of a hinge part.

In order to solve the above problems, the invention according to claim 1 is capable of rotating the first casing, the second casing, the first casing, and the second casing. In a flexible substrate holding structure comprising a hinge portion to be coupled and a flexible substrate disposed in the hinge portion and connecting a circuit in the first housing and a circuit in the second housing, the flexible substrate has a band part and has a stretched portion extending substantially perpendicularly from said strip portion, said second enclosure is provided with a hinge portion of the hinge support unit, it is accommodated so as to rotate shaft coaxial with said A cylindrical fixed shaft member that winds the extending portion of the flexible substrate when the first housing is pivotally opened with respect to the second housing and the belt portion of the flexible substrate is fixed to the fixed shaft. for fixing to the outer peripheral surface of the axial member, said a pair of arm portions A fastener for holding the Teijiku member, in the hinge portion, is accommodated so as to rotate shaft coaxially, characterized in that it comprises, a shaft member inserted into the fixed shaft member.

  According to the first aspect of the present invention, since the flexible substrate is fastened to the fixed shaft member by the fastener, the flexible substrate can be largely swung even if the first housing and the second housing are rotated. There is no. Therefore, the flexible substrate does not rub against each part of the hinge part.

  In addition, since the fixed shaft member is accommodated in the hinge portion, and the fixed shaft member is provided on the hinge portion shaft so as to be coaxial with the hinge portion shaft, the hinge portion can be reinforced by the fixed shaft member. .

According to a second aspect of the present invention, in the flexible substrate holding structure according to the first aspect, the fixed shaft member is in a state in which rotation around an axis is fixed with respect to the shaft member.
According to a third aspect of the present invention, in the flexible substrate holding structure according to the first aspect, the fixed shaft member includes a first bearing portion provided on the hinge portion and a first bearing portion so that the movement in the axial direction is fixed. It arrange | positions between 2nd bearing parts, It is characterized by the above-mentioned.
According to a fourth aspect of the present invention, in the flexible substrate holding structure according to the first aspect, the fastener has a bridge portion that winds the extending portion around the fixed shaft member from the outside so as not to rub against the belt portion. It is characterized by that.
Invention, characterized in that the flexible board holding structure according to claim 1, the pre-Symbol band portion fixed so as to be sandwiched between the arm portion and the outer peripheral surface of said fixed shaft member according to claim 5 And

According to the invention which concerns on Claim 5 , the strip | belt part of a flexible substrate is pinched | interposed between an arm part and the outer peripheral surface of a fixed shaft member, and a flexible substrate is fastened to a fixed shaft member by an arm part. Therefore, even if the first housing and the second housing are rotated, the flexible substrate does not swing greatly, and the flexible substrate does not rub against each part of the hinge portion.

The invention according to claim 6 is the flexible substrate holding structure according to claim 5 , wherein two convex portions are formed on the inner peripheral surface of the arm portion so as to be spaced apart in the circumferential direction, It is characterized by being sandwiched between the outer peripheral surface of the fixed shaft member and the arm portion between two convex portions.

According to the invention of claim 6 , since the belt portion of the flexible substrate is between the two convex portions, the extending portion is loosened or tightened by the rotation of the first housing and the second housing. However, the belt portion does not move in the circumferential direction of the fixed shaft member. For this reason, twisting of the belt portion can be prevented.

The invention according to claim 7 is an electronic apparatus having the flexible substrate holding structure according to any one of claims 1 to 6 .

According to the present invention, Ki out to prevent the Reruko flexible substrate rubbing, it is possible to reinforce the hinge portion.

  The best mode for carrying out the present invention will be described below with reference to the drawings. However, although various technically preferable limitations for implementing the present invention are given to the embodiments described below, the scope of the invention is not limited to the following embodiments and illustrated examples.

  FIG. 1 is a perspective view of a foldable electronic device 1. The foldable electronic device 1 is a mobile phone. In the foldable electronic device 1, the upper housing 2 is connected to the lower housing 3 by the hinge portion 4, and the upper housing 2 can rotate with respect to the lower housing 3 about the axis of the hinge portion 4. It has become. 1 shows a state in which the upper housing 2 is closed with respect to the lower housing 3, a display unit is provided on the front surface of the upper housing 2, and a front surface of the lower housing 3 is provided. A key operation unit is provided, and the display unit and the key operation unit face each other when the upper housing 2 is closed with respect to the lower housing 3.

  Hereinafter, the hinge part 4 is demonstrated using FIGS. 2 is an exploded perspective view of the hinge part 4 with the covers 91 to 95 removed, FIG. 3 is a perspective view of the covers 91 to 95 omitted, and FIG. It is a disassembled perspective view of the state which abbreviate | omitted illustration and the hinge part 4 was decomposed | disassembled. 5 to 6 are cross-sectional views of a plane perpendicular to the axis of the hinge portion 4 through the line V-V in FIG. 1, and FIGS. 7 to 8 are taken through the line VII-VII in FIG. 9 to 10 are cross-sectional views of a plane orthogonal to the axis of the hinge portion 4 through the line IX-IX in FIG. 5, 7, and 9 are drawings in a state in which the upper housing 2 and the lower housing 3 are closed, and FIGS. 6, 8, and 10 are in a state in which the upper housing 2 and the lower housing 3 are opened. It is a drawing. In the following description, the axial direction of the hinge portion 4 is the left-right direction.

  At the end of the lower housing 3 on the upper housing 2 side, a shaft stopper 10 is provided on the left side, and a hinge support portion 11 is provided on the right side. On the other hand, a first bearing portion 20 is provided on the left side, and a second bearing portion 21 is provided on the right side at the end of the upper housing 2 on the lower housing 3 side. The shaft stopper 10 and the hinge support portion 11 are integrally formed with the upper housing 2, and the first bearing portion 20 and the second bearing portion 21 are integrally formed with the lower housing 3, both of which are made of resin.

  The shaft stopper 10 has a cylindrical shape with the left-right direction as the axial direction, and a fitting groove 13 is formed on the left bottom surface 12 of the shaft stopper 10. The hinge support portion 11 has a cylindrical shape with the left-right direction as an axis, and a substantially cross-shaped attachment hole 14 penetrates from the left bottom surface to the right bottom surface.

  The first bearing portion 20 has a cylindrical shape with the left-right direction as an axis. The second bearing portion 21 has a cylindrical shape with the left-right direction as an axial direction. A circular mounting hole 22 is formed on the left bottom surface, and a mounting hole 23 is formed on the right bottom surface.

  The shaft stopper 10, the hinge support 11, the first bearing 20 and the second bearing 21 are coaxial, and the shaft stopper 10, the first bearing 20 and the second bearing from the left. 21 and the hinge support part 11 are arranged in this order.

  A shaft member 30 made of resin penetrates the shaft stopper 10 from the left to the right. Further, the shaft member 30 also penetrates the first bearing portion 20 from the left to the right, and the right end of the shaft member 30 is attached to the mounting hole. 22 is inserted.

  A flange portion 31 is formed at the left end portion of the shaft member 30, and the flange portion 31 is fitted in the fitting groove 13. As a result, the shaft member 30 is fixed to the shaft stopper 10, the rotation of the shaft member 30 is restricted, and the movement of the shaft member 30 in the right thrust direction is restricted.

  The shaft member 30 has a columnar portion 32 inserted into the first bearing portion 20 and the shaft stopper 10, and the shaft member 30 can rotate about the axis with respect to the first bearing portion 20. The radial load of the shaft member 30 is received by the first bearing portion 20.

  Further, the shaft member 30 has a barrel-shaped cross-section at a portion 33 extending rightward from the first bearing portion 20. The right end portion of the shaft member 30 is rotatable about the axis with respect to the second bearing portion 21.

  A hinge unit 40 penetrates from the right to the left in the attachment hole 14 of the hinge support portion 11, and the hinge unit 40 is also inserted into the attachment hole 23 of the second bearing portion 21. The hinge unit 40 includes a first fitting body 41 that is fitted in the attachment hole 14 and supported by the hinge support portion 11, and a second fitting member that is fitted in the attachment hole 23 and supported by the second bearing portion 21. And a fitting body 42. The first fitting body 41 rotates around the axis with respect to the second fitting body 42, but is provided so that the torque is increased at two predetermined locations. The upper housing 2 and the lower housing 3 are closed and overlapped and fixed at a location where one torque is increased, and the upper housing 2 and the lower housing 3 are opened and fixed at a location where the other torque is increased. Is done. A simple structure may be adopted in which a shaft rod is used instead of the hinge unit 40 and the shaft rod is rotatable with respect to at least one of the hinge support portion 11 and the second bearing portion 21.

  As shown in FIGS. 1 and 2, a cover 91 covers the first bearing portion 20 and the second bearing portion 21 and is fixed to the upper housing 2, and a cover 92 covers the shaft stopper 10 and the lower housing. 3, and a cover 93 covers the hinge support 11 and is fixed to the lower housing 3. The cover 94 covers the surface on which the concave portion 9 is formed, and the cover 95 covers a part of the cover 94 and the end of the lower housing 3 and is fixed to the lower housing 3. The covers 91 to 95 are all made of resin.

  A flexible substrate holding structure for holding a flexible (FPC: Flexible Printed Circuit) substrate 60 inside the covers 91 to 95 of the hinge portion 4 will be described with reference to FIGS. In FIG. 2, the flexible substrate 60 is not shown for easy viewing of the drawing.

  The flexible substrate 60 is wound around a fixed shaft member 50 made of resin, and is further fastened to the fixed shaft member 50 by a fastener 70 made of resin. Note that the fixed shaft member 50 and the fastener 70 are covered with a cover 91.

  The flexible substrate 60 will be described in detail with reference to FIG. FIG. 11 is a plan view showing a state in which the flexible substrate 60 is developed.

  As shown in FIG. 11, the flexible substrate 60 includes a rectangular frame portion 61 that is line-symmetric with respect to the line A, and a first extending portion 62 that extends perpendicularly from one side 66 of the rectangular frame portion 61 to the side 66. And a second extending portion 63 extending perpendicularly to the side 67 from the side 67 opposed to the side 66. A connector 64 is formed at the end of the first extending portion 62, and a connector 65 is formed at the end of the second extending portion 63.

  Wiring from the connector 64 to the connector 65 is formed, and there are wiring through the side 68 and wiring through the side 69 in the rectangular frame 61. Accordingly, the width W1 of the sides 66 to 69 of the rectangular frame portion 61 is narrower than the width W2 of the extending portions 62 and 63.

  When the flexible substrate 60 is accommodated in the covers 91 to 95 of the hinge part 4, the sides 66 and 67 of the rectangular frame part 61 are folded in two along the line A as shown in FIGS. The frame portion 61 is U-shaped. In the following description, the overlapped side 66 is referred to as a band portion 66a, the overlapped side 67 is referred to as a parallel portion 67a, and the overlapped sides 68 and 69 are referred to as a connecting portion 68a. Note that the flexible substrate 60 may not be shaped as shown in FIG. 12 by folding the rectangular frame portion 61 in half, but may be a flexible substrate shaped as shown in FIG. That is, a U-shaped frame portion including a band portion 66a, a parallel portion 67a, and a connecting portion 68a is formed in advance, the first extending portion 62 is extended from the band portion 66a, and the second extending portion 63 is extended from the parallel portion 67a. May be extended. In this case, the width W1 and the width W2 are substantially equal.

  The fastener 70 will be described in detail with reference to FIG. FIG. 13 is an exploded perspective view showing a state in which the fastener 70 is removed from the fixed shaft member 50. As shown in FIG. 13, the fastener 70 includes a pair of left and right arm portions 71, 72 provided in a bow shape, a bridge portion 73 laid between the arm portion 71 and the arm portion 72, and an arm portion 71. , 72 projecting inwardly at the respective distal end portions, projecting portions 78, 79 projecting from the inner circumferential surface of the arm portion 71 at intervals in the circumferential direction, and the inner circumference of the arm portion 72 It is comprised from the convex parts 80 and 81 convexly provided in the surface in the circumferential direction at intervals. The convex portions 79 and 81 are at the roots of the left and right end portions of the bridge portion 73.

  The fixed shaft member 50 will be described in detail. The fixed shaft member 50 is a cylindrical member having the left-right direction as the axial direction, and the hollow 51 penetrating the fixed shaft member 50 left and right has a barrel shape. Locking recesses 52 to 55 corresponding to the claw portions 74 to 77 are formed on the outer peripheral surface of the fixed shaft member 50 on the left and right ends, and the fitting recesses 56 and 57 corresponding to the protrusions 78 and 80, respectively. Is formed. A fitting recess 58 (shown in FIG. 15) is formed on the outer peripheral surface of the fixed shaft member 50 and in the middle between the left end and the right end. In FIG. 13, the fitting recess 58 is hidden by the fixed shaft member 50.

  When the flexible substrate 60 is wound around the fixed shaft member 50, as shown in FIG. 13, the parallel portion 67a is bent into a U shape, and the connecting portion 68a is bent into an S shape. As shown in FIGS. 13 and 14, the belt portion 66 a is parallel to the axis of the fixed shaft member 50, the belt portion 66 a is along the outer peripheral surface of the fixed shaft member 50, and the fixed shaft member is formed by the arm portions 71 and 72. 50, the convex portions 78 and 80 are fitted into the fitting concave portions 56 and 57, the bridge portion 73 is fitted into the fitting concave portion 58, and the claw portions 74 to 77 are fitted into the locking concave portions 52 to 55, respectively. Lock each one. Then, as shown by an arrow B in FIG. 14, the first extending portion 62 is wound around the fixed shaft member 50 two and a half times from the outside of the bridge portion 73.

  FIG. 15 is a cross-sectional view of a surface orthogonal to the axial direction in a state where the flexible substrate 60 is fastened to the fixed shaft member 50 by the fastener 70. As shown in FIGS. 14 and 15, when the fixed shaft member 50 is held by the arm portions 71 and 72, a gap is formed between the convex portion 78 and the convex portion 79 and the inner peripheral surface of the arm portion 71 and the fixed shaft. It is formed between the outer peripheral surface of the member 50, and a gap is formed between the inner peripheral surface of the arm portion 72 and the outer peripheral surface of the fixed shaft member 50 between the convex portion 79 and the convex portion 81. The band portion 66 a is sandwiched between the inner peripheral surface of the arm portion 71 and the outer peripheral surface of the fixed shaft member 50 in the gap. When the band part 66a contacts the convex parts 78 to 81, twisting of the band part 66a can be prevented.

  The bridge portion 73 fitted in the fitting recess 58 is flush with the outer peripheral surface of the fixed shaft member 50 at one edge 73a, and the radius of curvature R of the outer peripheral surface 73b of the bridge portion 73 is one edge 73a. Increases toward the other edge 73c. Therefore, the bridge portion 73 is not flush with the outer peripheral surface of the fixed shaft member 50 at the other edge 73 c, and the edge 73 c protrudes from the outer peripheral surface of the fixed shaft member 50. The band part 66a of the flexible substrate 60 is along the edge 73c of the bridge part 73, and the edge of the band part 66a abuts on the protruding part of the bridge part 73, so that the edge of the band part 66a is wound outward. It does not rub against the stretched part 62 of.

  As shown in FIGS. 2 to 4, the fixed shaft member 50 is disposed between the first bearing portion 20 and the second bearing portion 21. The right portion 32 of the shaft member 30 is inserted into the hollow 51 of the fixed shaft member 50, and the shaft member 30 and the fixed shaft member 50 are coaxial, but the hollow 51 and the right portion 32 of the shaft member 30 are Since it has a barrel shape, the fixed shaft member 50 is in a state in which the rotation around the shaft is fixed. Further, the length of the fixed shaft member 50 in the left-right direction is equal to the distance between the first bearing portion 20 and the second bearing portion 21, and the fixed shaft member 50 is fixed to move in the left-right direction.

  The tip of the first extending portion 62 wound around the fixed shaft member 50 is inserted into the through hole 5 formed in the upper housing 2, and the connector 64 at the distal end is attached to the circuit board housed in the upper housing 2. It is connected. The through hole 5 is formed at the end of the upper housing 2 between the first bearing portion 20 and the second bearing portion 21.

  A partition wall 6 perpendicular to the axis of the shaft stopper 10 is formed in the vicinity of the shaft stopper 10, and a slit 7 is formed between the partition wall 6 and the shaft stopper 10. An inclined surface 8 is formed on the end surface of the lower housing 3 and below the shaft stopper 10, and a recess 9 is formed on the end surface of the lower housing 3 and below the first bearing portion 20. The through hole 19 is formed at the bottom of the recess 9.

  The belt portion 66 a is guided along the outer peripheral surface of the first bearing portion 20 in a state parallel to the axis of the first bearing portion 20, and is further guided by the slit 7. The connecting portion 68a bent in an S shape is guided along the inclined surface 8, and a parallel portion 67a bent in a U shape is accommodated in the recess 9. The tip of the second extending portion 63 is inserted into the through hole 19, and the connector 65 at the tip is connected to the circuit board housed in the lower housing 3.

  In the hinge portion 4 as described above, when the user opens the upper housing 2 with respect to the lower housing 3, the winding condition of the extending portion 62 of the flexible substrate 60 is loosened, and the user moves upward with respect to the lower housing 3. When the housing 2 is opened, the extending portion 62 of the flexible substrate 60 is wound around the fixed shaft member 50. When the wound portion of the extending portion 62 of the flexible substrate 60 is loosened or wound, the wound portion tends to swing as a whole, but the extending portion 62 is wound around the fixed shaft member 50. Therefore, the wound portion does not swing greatly. Therefore, the flexible substrate 60 does not rub against the inner surface of the cover 91.

  Further, the band portion 66 a of the flexible substrate 60 is sandwiched between the two arm portions 71 and 72 and the fixed shaft member 30, and the extending portion 62 is wound around the fixed shaft member 30 between the two arm portions 71 and 72. Therefore, even if it is going to open and close the upper housing | casing 2 and the lower housing | casing 3, the strip | belt part 66a is hard to twist.

  Further, since the extending portion 62 of the flexible substrate 60 is wound from outside the bridge portion 73, the edge of the band portion 66a does not rub against the first extending portion 62 wound outward.

  Further, since the band portion 66a of the flexible substrate 60 is between the convex portions 78 and 79, even if the first extending portion 62 is loosened or tightened due to the rotation of the upper casing 2 and the lower casing 3, The portion 66 a does not move in the circumferential direction of the fixed shaft member 30. Therefore, twisting of the band part 66a can be prevented.

  As described above, by preventing the flexible substrate 60 from rubbing and twisting, it is possible to extend the life of the flexible substrate 60 and prevent the turning operation of the upper housing 2 and the lower housing 3 from becoming heavy. can do.

  Further, since the shaft member 30 is inserted from the shaft stopper 10 to the second bearing portion 21, the hinge portion 4 can be reinforced. Further, since the rotation of the fixed shaft member 50 is fixed with respect to the shaft member 30, the strength of the shaft member 30 can be reinforced by the fixed shaft member 50.

  Further, since the fixed shaft member 50 is sandwiched between the first bearing portion 20 and the second bearing portion 21, the fixed shaft member 50 does not move in the axial direction. Wear and impact on the bearing portion 20 and the shaft member 30 can be suppressed, and the hinge portion 4 can be reinforced.

  Moreover, by covering with the covers 91 to 95, the shaft stopper 10, the hinge support 11, the first bearing 20, the second bearing 21, the fixed shaft member 30, and the like can be protected.

  Further, since the fixed shaft member 50 is accommodated inside the covers 91 to 95, the hinge portion 4 can be reinforced. In particular, since the shaft stopper 10, the hinge support 11, the first bearing 20, the hinge receiver 21, the fixed shaft member 50, and the like are clogged inside the covers 91 to 95 and there is almost no space, the hinge 4 Can be reinforced.

  The shaft stopper 10, the hinge support 11, the first bearing 20, the second bearing 21, the shaft member 30, the fixed shaft 50, the fastener 70, and the covers 91 to 95 are all made of resin. Therefore, even if the antenna is built in the upper casing 2 or the lower casing 3 in the vicinity of the hinge portion 4, the radio wave reception sensitivity is not reduced. Furthermore, the folding electronic device 1 can be reduced in weight as compared with metal, and the water resistance can be improved.

  Further, since the band portion 66a, the parallel portion 67a, and the connecting portion 68a are narrowed by folding the rectangular frame portion 61 in half, the storage space for the band portion 66a, the parallel portion 67a, and the connecting portion 68a is reduced. can do. On the other hand, even if the first extending portion 62 is deformed by the rotation of the upper housing 2 and the lower housing 3, the extending portion 62 is not bent, so that the variable stress of the extending portion 62 does not increase.

  The present invention is not limited to the above-described embodiment, and various improvements and design changes may be made without departing from the spirit of the present invention.

  In the above embodiment, the foldable electronic device 1 is a mobile phone, but it may be a notebook personal computer, a digital camera, a wristwatch, a PDA (Personal Digital Assistance), an electronic notebook, or other electronic devices.

  Moreover, in the said embodiment, although the shaft member 30 is a different body from the fixed shaft member 50, these may be integrally molded.

1 is a perspective view of a foldable electronic device 1. FIG. It is a perspective view in the state where covers 91-95 were removed. It is a perspective view in the state where covers 91-95 were removed. FIG. 2 is an exploded perspective view of the folding electronic device 1. FIG. 5 is a cross-sectional view of a plane orthogonal to the axis of the hinge part 4 through the line VV in FIG. 1 in a state in which the foldable electronic device 1 is closed. FIG. 5 is a cross-sectional view of a plane orthogonal to the axis of the hinge portion 4 through the line V-V in FIG. 1 in a state in which the folding electronic device 1 is opened. FIG. 7 is a cross-sectional view of a plane orthogonal to the axis of the hinge portion 4 through the line VII-VII in FIG. 1 in a state in which the folding electronic device 1 is closed. FIG. 7 is a cross-sectional view of a plane orthogonal to the axis of the hinge part 4 through the line VII-VII in FIG. 1 in a state in which the folding electronic device 1 is opened. FIG. 6 is a cross-sectional view of a plane orthogonal to the axis of the hinge part 4 through the line IX-IX in FIG. 1 in a state in which the folding electronic device 1 is closed. FIG. 3 is a cross-sectional view of a plane orthogonal to the axis of the hinge portion 4 through the line IX-IX in FIG. 1 in a state in which the folding electronic apparatus 1 is opened. FIG. 6 is a development view of the flexible substrate 60. 2 is a drawing of a state in which a flexible substrate 60 is folded along a line A. FIG. 3 is an exploded perspective view of a state in which a fastener 70 is removed from a fixed shaft member 50. FIG. 3 is a perspective view of a state in which a flexible substrate 60 is fastened to a fixed shaft member 50 by a fastener 70. FIG. 5 is a cross-sectional view of a surface orthogonal to the axial direction in a state where the flexible substrate 60 is fastened to the fixed shaft member 50 by the fastener 70. FIG. It is a schematic perspective view of the conventional folding type mobile phone.

Explanation of symbols

2 Upper housing (first housing)
3 Lower case (second case)
4 Hinge part 30 Shaft member 50 Fixed shaft member 60 Flexible substrate 62 First extending part 66a Band part 70 Fastener 71, 72 Arm part 73 Bridge part 78, 79, 80, 81 Convex part

Claims (7)

A first housing, a second housing, a hinge portion that rotatably connects the first housing and the second housing, and the first housing; In a flexible substrate holding structure comprising a circuit in a housing and a flexible substrate for connecting the circuit in the second housing,
The flexible substrate has a band part and an extending part extending substantially perpendicularly from the band part,
Said second enclosure is provided with a hinge portion of the hinge support portion, is accommodated so as to rotate shaft coaxially, rotating the first housing relative to the second housing about the axis A cylindrical fixed shaft member for winding the extending portion of the flexible substrate,
In order to fix the belt portion of the flexible substrate to the outer peripheral surface in the axial direction of the fixed shaft member, a fastener having a pair of arm portions and holding the fixed shaft member ;
A shaft member accommodated in the hinge portion so as to be coaxial with the rotation shaft, and inserted into the fixed shaft member;
A flexible substrate holding structure comprising:   The flexible substrate holding structure according to claim 1, wherein the fixed shaft member is in a state in which rotation around an axis is fixed with respect to the shaft member.   The said fixed shaft member is arrange | positioned between the 1st bearing part provided in the said hinge part and the 2nd bearing part so that the movement of an axial direction may be fixed. The flexible substrate holding structure as described.   2. The flexible substrate holding structure according to claim 1, wherein the fastener includes a bridge portion that winds the extending portion around the fixed shaft member from the outside so as not to rub against the belt portion. 3. . The flexible board holding structure according to claim 1, characterized in that it is fixed so as to be sandwiched between the outer peripheral surface and the arm portion of the front Symbol band portion and the fixed shaft member. Two convex portions are formed on the inner peripheral surface of the arm portion so as to be spaced apart in the circumferential direction,
The flexible substrate holding structure according to claim 5, wherein the band portion is sandwiched between the outer peripheral surface of the fixed shaft member and the arm portion between the two convex portions.   The electronic device which has a flexible substrate holding structure as described in any one of Claim 1 to 6.

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