JP2009283550A - Electronic apparatus, and wiring method of ultrafine coaxial cable assembly in electronic apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electronic apparatus for responding to a housing of a slide structure and using an ultrafine cable assembly excelling in a bending durability characteristic; and a wiring method of an ultrafine coaxial cable assembly. <P>SOLUTION: In a bending slide part between a first alignment part 11 and a second alignment part 12, a plurality of ultrafine coaxial cables C are divided into an even number of cable groups 13 and 14 in the order from one-side ends 11s and 12s of both the alignment parts 11 and 12 to the other-side ends 11t and 12t, and are formed into a wiring structure wherein the ultrafine coaxial cables C of the cable group 13, out of them, located at an odd-numbered position when counted from the one-side ends 11s and 12s of both the alignment parts 11 and 12 are bent in a direction heading the other-side ends 11t and 12t from the one-side ends 11s and 12s; the ultrafine coaxial cables C of the cable group 14 located at the even-numbered position are bent in a direction heading the one-side ends 11s and 12s from the other-side ends 11t and 12t; and the respective cable groups 13, 14 are superposed on the other cable groups 14, 13, respectively. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an electronic device using a micro coaxial cable assembly that can be applied to a slide-structured housing and a wiring method of the micro coaxial cable assembly in the electronic device.

  Conventionally, an FPC (Flexible Printed Circuit) has been used as an internal wiring member used for transmission of an electrical signal within an electronic device (particularly between housings) in which a plurality of housings are connected. In recent years, electronic devices typified by mobile phones have been rapidly reduced in size, weight, and functionality. For this reason, the transmission capacity of electric signals in electronic devices is large, the transmission speed is increased, and the transmission frequency is particularly in the high frequency band. The demand for using coaxial cables is increasing due to transmission characteristics and noise resistance.

  The coaxial cable is configured to include a center conductor, an insulator covering the outer periphery thereof, an outer conductor disposed coaxially with respect to the center conductor on the outer side, and an outer cover covering the outer periphery thereof. Since the outer conductor surrounds the outer side of the center conductor and shields (shields) electromagnetic waves, it has excellent noise resistance. The ultrafine coaxial cable has a very thin diameter (outside diameter of about 0.2 to 0.3 mm) among the coaxial cables, and is suitable for wiring in a narrow space.

  For example, in Patent Document 1, as an inter-board wiring for connecting two substrates that slide with each other, a plurality of coaxial cables are bundled on a plane at both ends, and an unbundled region of the middle portion of the coaxial cable is provided. A connection structure held as an extra length is described. Further, according to the description in paragraph 0018 of the specification, the extra length portion of the coaxial cable can be accommodated in an extremely narrow space of 2 to 3 mm between the substrates, and the inter-substrate wiring accommodated in the space is between the substrates. It is possible to follow the sliding movement. Further, paragraphs 0025 and 0026 describe that individual coaxial cables can be freely bent and do not hinder the flexibility of inter-substrate wiring. However, there is a possibility that the unbundled region of the middle part may be damaged by being entangled.

Further, FIG. 1A of Patent Document 2 describes a cable assembly in which a plurality of micro coaxial cables are divided into two connection line groups and the connection line groups intersect each other. When the cable assembly is further twisted and bound as shown in FIG. 1C, the cable assembly can cope with two-way rotation (curving / twisting). However, it is not described that the connection structure is housed between a pair of housings that slide with each other. Further, in the form in which this connection structure is incorporated in a mobile phone, the central portion is bound by a cylindrical binding member, so that the flexibility is poor, and it is considered that it cannot be applied to a slide structure housing.
JP 2007-036515 A JP 2005-184344 A

  When arranged in the α shape as listed in the cited document 1, the overlapping portion of “α” is in the width direction in which the micro coaxial cables are aligned, and there is a disadvantage that a wide wiring space is required. Also, if the number of aligned micro coaxial cables is large, it is difficult to arrange them in an α shape. In addition, when arranged in an Ω shape, the substrate interval needs to be four times or more the outer diameter of the micro coaxial cable, and there is a limit to reducing the substrate interval. Further, the sliding direction of the substrate needs to be the length direction of the micro coaxial cable as shown in the cited document 1. Therefore, it is difficult to perform wiring so as to slide in the width direction in which a plurality of micro coaxial cables are aligned because the micro coaxial cables are twisted during sliding.

  As shown in FIG. 6, when using the micro coaxial cable assembly 3 in which a plurality of micro coaxial cables C are arranged in a line at both ends, an extra length is required for the cable to cope with the sliding movement. However, when a large number of micro coaxial cables are bent in the same direction, the load is concentrated on the terminal portions 1 and 2 that are fixed ends of the cable, and the wire is easily disconnected. When a large number of micro coaxial cables are aligned in a row, the load tends to concentrate at the end (left and right ends in FIG. 6) rather than the central portion in the alignment direction. Moreover, there exists a possibility of disconnection also when cables are entangled.

  The present invention has been made in view of the above circumstances, and provides an electronic device using a micro coaxial cable assembly that is compatible with a sliding structure housing and has excellent bending durability characteristics, and a wiring method for the micro coaxial cable. Is an issue.

In order to solve the above-described problem, a micro coaxial cable assembly in which a plurality of micro coaxial cables are aligned in a row at each of a first alignment portion and a second alignment portion, and a first that is connected to the first alignment portion. And a second casing to which the second alignment portion is connected, and the first casing and the second casing are arranged along a predetermined facing surface facing each other. An electronic device attached so as to be reciprocally movable in a sliding direction,
In the plurality of micro coaxial cables, the bending sliding portions between the first alignment portion and the second alignment portion are opposed to each other of the first housing and the second housing. In the bent sliding portion, the plurality of micro coaxial cables are partitioned into an even number of cable groups in order from one end to the other end of both alignment portions,
Among them, the micro coaxial cables of the odd-numbered cable group counted from one end of both aligned parts are curved in the direction from one end of both aligned parts to the other end, and the even-numbered cable group counted from one end of both aligned parts. Provided is an electronic device in which a micro coaxial cable is curved in a direction from one end to the other end of both alignment portions, and any of the cable groups overlaps with any of the other cable groups.

In this electronic apparatus, the overlapping of the cable groups is such that when a certain cable group and another cable group overlap at a plurality of locations, the vertical relationship between the certain cable group and the other cable group is the same throughout the plurality of locations. And
Whether each of the cable groups is bent in a direction from one end to the other end of both alignment portions or in a direction from the other end to the one end, the first housing and the second housing are It can be set as the structure currently hold | maintained by the opposing surface.
Further, when the number of the even number of cable groups is 2N and n is an integer from 1 to N, the 2n-1th cable group counted from one end of both alignment parts and one end of both alignment parts The 2n-th cable group that is counted overlaps at two locations, of which the 2n-1st cable group is higher than the 2n-th cable group, and at another one location, the 2n-1th cable group is 2n. It can be set as the structure which overlaps below the cable group which hits the second.

Furthermore, the present invention provides a micro coaxial cable assembly in which a plurality of micro coaxial cables are aligned in a row at each of a first alignment portion and a second alignment portion, and a first housing in which the first alignment portion is connected. A predetermined sliding direction along opposite surfaces of the first casing and the second casing, which are opposed to each other. A wiring method of a micro coaxial cable assembly in an electronic device attached to be reciprocally movable,
The plurality of micro coaxial cables are partitioned into an even number of cable groups in order from one end to the other end of both alignment portions at a bending sliding portion between the first alignment portion and the second alignment portion. In addition, the micro coaxial cables of the odd-numbered cable group counted from one end of both alignment portions are bent in the direction from one end to the other end of both alignment portions, and the even-numbered cable group counted from one end of both alignment portions. The micro coaxial cable is curved in a direction from the other end of both alignment portions toward one end, so that any cable group overlaps with any other cable group. An assembly wiring method is provided.

  According to the present invention, since a plurality of ultrafine coaxial cables are divided into an even number of cable groups and overlapped with each other, the ultrafine coaxial cables are hardly entangled and exhibit excellent bending durability characteristics.

The present invention will be described below with reference to the drawings based on the best mode.
1 and 2 show an example of the wiring structure of the micro coaxial cable assembly 10 in the electronic apparatus of the present invention, and FIG. 3 shows a cross-sectional view of the wiring structure.
The electronic apparatus M of the present invention whose schematic configuration is shown in FIG. 3 includes a micro coaxial cable assembly 10, a first casing L, and a second casing U, and the first casing L and the second casing U. Is attached so as to be able to reciprocate in a predetermined sliding direction along the opposing surfaces P1, P2 facing each other.

  As shown in FIG. 1 and FIG. 2, the micro coaxial cable assembly 10 includes a plurality of micro coaxial cables C aligned in a row at the first alignment portion 11 and the second alignment portion 12, respectively. A portion (bending sliding portion) F between the first alignment portion 11 and the second alignment portion 12 is bent and slid by the sliding movement of U and L.

Here, the slide movement mode is preferably a reciprocating linear movement. FIG. 1 shows a case where the sliding direction A of the casings U and L is orthogonal to the alignment direction (left and right direction in FIG. 1) of the micro coaxial cable C in the alignment portions 11 and 12 of the micro coaxial cable assembly 10. The case where the sliding direction A of the casings U and L is parallel to the alignment direction is shown. The alignment direction of the micro coaxial cable assembly 10 may be oblique (arbitrary angle) with respect to the sliding direction A of the housings U and L.
The relationship between the alignment direction in the first alignment portion 11 and the alignment direction in the second alignment portion 12 is preferably parallel to each other as shown in FIGS.

The first alignment unit 11 is connected to the first housing L, and the second alignment unit 12 is connected to the second housing. The bending sliding portion F between the first alignment portion 11 and the second alignment portion 12 is accommodated between the opposing surfaces P1, P2 of the first housing L and the second housing U that face each other. Has been.
Specifically, a circuit (not shown) is accommodated in each of the housings L and U, and a circuit side connection portion connected to the circuit is connected to a terminal of the micro coaxial cable assembly 10. The circuit in the first housing L and the circuit in the second housing U are connected via the micro coaxial cable assembly 10. For the connection between the circuit side connection portion and the terminal of the micro coaxial cable assembly 10, an appropriate method such as a connector or soldering can be used.

  The alignment portions 11 and 12 may be provided at the end of the micro coaxial cable assembly 10. Further, as shown in FIG. 7, the terminals 11 c and 12 c may be outside the alignment units 11 and 12. In this case, between the alignment unit 11 and the terminal 11c and between the alignment unit 12 and the terminal 12c, the micro coaxial cable C is connected to the inside of each case (the inside of the first case L and the second case). It can be accommodated in the body U).

  Each of the micro coaxial cables C has a surplus length that can follow the sliding movement of the casings L and U. That is, the length of the micro coaxial cable C is longer than the linear distance between the first alignment portion 11 and the second alignment portion 12. This extra length needs to be accommodated between the opposing surfaces P1 and P2 of the casing so that it can move freely when the casings L and U slide.

  In this embodiment, in the bending sliding portion F of the micro coaxial cable assembly 10, a plurality of micro coaxial cables C are connected in order from one end 11s, 12s of both alignment portions 11, 12 to the other end 11t, 12t. The cable is divided into groups 13 and 14, and the direction in which the extra length curves is changed for each of the cable groups 13 and 14.

At the position of both alignment portions 11 and 12, the micro coaxial cable C of the cable group 13 corresponding to the odd number from the one end 11s and 12s is in the direction from the one end 11s and 12s to the other end 11t and 12t. It is curved in the right direction in FIGS.
At the same time, the micro coaxial cable C of the even-numbered cable group 14 counted from the one ends 11s and 12s is directed from the other ends 11t and 12t of the alignment portions 11 and 12 to the one ends 11s and 12s (FIGS. 1 and 2). Then it curves to the left).

  The alignment order from one end 11s to the other end 11t of the first alignment portion 11 and the alignment order from the one end 12s to the other end 12t of the second alignment portion 12 are the same for all the micro coaxial cables C. That is, the first cable group 13 is wired between the region 11 a on the one end 11 s side of the first alignment unit 11 and the region 12 a on the one end 12 s side of the second alignment unit 12, and the second cable group 14. Is wired between the region 11 b on the other end 11 t side of the first alignment portion 11 and the region 12 b on the other end 12 t side of the second alignment portion 12. Among the same cable groups 13 and 14, each micro coaxial cable C is aligned with the second alignment portion 12 in the same order as the first alignment portion 11.

  Thereby, in the alignment parts 11 and 12, although the 1st cable group 13 is located in the one end 11s and 12s side and the 2nd cable group 14 is located in the other end 11t and 12t side about all the micro coaxial cables C. On the other hand, the order of the cable groups 13 and 14 in the width direction (left and right direction in FIGS. 1 and 2) is changed at the center in the length direction of the micro coaxial cable assembly 10 (up and down direction in FIGS. 1 and 2). Yes.

For this reason, the cable groups 13 and 14 overlap each other at two locations between the central portion and the alignment portions 11 and 12.
In addition, as for the overlap between the first cable group 13 and the second cable group 14, the vertical relationship between the first cable group 13 and the second cable group 14 is the same throughout the plurality of overlapping portions. In this example, as viewed from the front of FIGS. 1 and 2, the first cable group 13 is on the lower side and the second cable group 14 is on the upper side.

In the wiring structure of this embodiment, as shown in FIG. 3, the bending sliding portion F between the first alignment portion 11 and the second alignment portion 12 is accommodated between the opposing surfaces P1 and P2 of the housing. Compared to the extra length of the micro coaxial cable C, the distance to the facing surfaces P1, P2 of the housing is shorter.
In such a state, even if an external force acts in a direction that reverses the direction in which the micro coaxial cable C is bent, an elastic repulsive force is generated by the convex curved shape, so that a force generated during the slide movement is generated. To the extent, the direction in which the micro coaxial cable C curves cannot be reversed.

In addition, the curved shape rotates upward or downward (clockwise or counterclockwise in FIG. 3) because the distance to the facing surfaces P1 and P2 of the housing is short, so that the force generated during the sliding movement is about Have difficulty.
Accordingly, the first cable group 13 is bent in the direction from the one end 11s, 12s of the aligning portions 11, 12 to the other end 11t, 12t, and the second cable group 14 is bent at the other end 11t of the aligning portions 11, 12. , 12t to be bent in the direction toward the one ends 11s, 12s is held by the facing surfaces P1, P2 of the housing.

That is, for the movement of each cable C accompanying the sliding of the casings L and U, the limitation due to the mutual overlap of the cable groups 13 and 14 and the limitation due to the facing surfaces P1 and P2 of the adjacent casings act in combination. As a result, the positional relationship in which the first cable group 13 is on the lower side and the second cable group 14 is on the upper side is less likely to collapse. At the same time, the alignment order of the micro coaxial cables C in the respective cable groups 13 and 14 is also maintained.
As a result, entanglement and concentration of bending stress between the micro coaxial cables C hardly occur between the cable groups 13 and 14 and within each cable group 13 and 14, and the sliding movement of the housings L and U is repeated many times. However, the micro coaxial cable C is hard to be disconnected and has excellent bending durability. Even when the gap between the opposing surfaces P1 and P2 of the first casing L and the second casing U is 3 mm or less, cable damage and disconnection can be suppressed, and the service life can be extended.

Since the bending sliding portion F does not require a binding member such as an adhesive tape, adhesive, or string, the bending position of each micro coaxial cable C can be varied within a range in which the overlapping of the cable groups 13 and 14 is maintained. . For this reason, even when a deviation in the bending amount is required for each alignment position of the micro coaxial cable C depending on the degree of slide movement, a different bending amount can be taken for each micro coaxial cable C.
Further, since the cables are divided into a plurality of cable groups 13 and 14, the alignment width for each of the cable groups 13 and 14 is small, and the load is less likely to concentrate on the end portion in the alignment direction.

  As shown in FIG. 1, when the sliding direction A of the casings U and L is orthogonal to the alignment direction of the micro coaxial cables C in the alignment portions 11 and 12 (left and right direction in FIG. 1), the wiring space in the width direction is narrower Is preferred. According to the wiring structure of the present embodiment, each cable group 13, 14 is bent in a direction to be overlapped with the other cable groups 14, 13, so that the width of the wiring space in the width direction is small. The width of the wiring space in this embodiment can be about the same as the width when the micro coaxial cable C is straightened as shown in FIG.

  As shown in FIG. 2, the wiring space in the width direction is also narrow when the sliding direction B of the housings U and L is parallel to the alignment direction (left and right direction in FIG. 2) of the micro coaxial cables C in the alignment portions 11 and 12. Is preferred. According to the wiring structure of the present embodiment example, as shown in FIG. 2B, the respective cable groups 13 and 14 are bent so as to be superimposed on the other cable groups 14 and 13, so that this wiring structure is shown in FIG. Even if it is slid left and right as in a) and (c), the width of the wiring space in this embodiment is sufficient within the range in which the alignment portions 11 and 12 move, and it is further bent to the left and right. It is not necessary to take the width.

  As shown in FIG. 4, local cables are applied by applying resin or the like to the portions where the cable groups 13 and 14 are connected to the alignment portions 11 and 12 (the base portions of the bent sliding portions F) and solidifying them. Can reduce the load. As a method for forming the cable reinforcing portions 15a, 15b, 16a, and 16b for this purpose, for example, an ultraviolet curable resin is applied from the edge of the alignment portions 11 and 12 to the length of about 1 to 1.5 mm along the cable C. And a method of curing by UV irradiation. The cable reinforcing portions 15a, 15b, 16a, and 16b may be provided separately for each of the cable groups 13 and 14 as shown in FIG. 4, or each of the aligned portions 11 and 12 extends over the plurality of cable groups 13 and 14. Two reinforcing portions may be formed.

In order to configure the wiring structure of the micro coaxial cable assembly 10 in the electronic apparatus M as shown in FIGS. 1 to 3, as shown in FIG. 6, a plurality of micro coaxial cables C are connected to the first alignment section 1 and the first alignment section 1. It is preferable to prepare a micro coaxial cable assembly 3 that is aligned in a line at each of the two alignment portions 2 and to connect them by incorporating them in the casings L and U of the electronic apparatus M.
The casings L and U include a first casing L to which the first alignment unit is connected and a second casing U to which the second alignment unit is connected. And the second housing U are preferably attached so as to be able to reciprocate in a predetermined sliding direction along their opposing surfaces.

As an assembling procedure, the following procedure can be cited.
As shown in FIGS. 1 and 2, the micro coaxial cable C of the micro coaxial cable assembly 3 of FIG. 6 is aligned at the bent sliding portion between the first alignment portion 1 and the second alignment portion 2 as shown in FIGS. The sections 11 and 12 are divided into two cable groups 13 and 14 by the one end 11s and 12s side and the other end 11t and 12t.
Among them, the micro coaxial cable C of the cable group 13 on the one end 11 s and 12 s side of both the alignment portions 11 and 12 is bent in a direction from the one end 11 s and 12 s of the alignment portions 11 and 12 toward the other end 11 t and 12 t. Further, the micro coaxial cable C of the cable group 14 on the other end 11t, 12t side of both the alignment portions 11, 12 is bent in a direction from the other end 11t, 12t of the alignment portions 11, 12 toward the one end 11s, 12s. As a result, the cable groups 13 and 14 overlap each other.
During assembly, the cable C bent in a specific direction can maintain the bending direction without applying excessive external force due to its own elastic force. And if an assembly is completed, since it accommodates between a pair of housing | casing L and U, the inversion of a bending direction can be prevented.
The assembly procedure is not limited to the above, and any procedure can be adopted according to the structure of the housings L and U.

A coaxial cable is composed of a central conductor made of a single core wire, a stranded wire, etc., an insulator covering the outer periphery thereof, an outer conductor arranged coaxially on the outer side of the insulator, and a sheath covering the outer side. . The outer conductor can be constituted by a horizontal winding, a spiral winding, a mesh structure, or the like.
The ultra-fine coaxial cable is preferably a cable having a central conductor size of AWG 36 or less, more preferably a cable in the range of AWG 42 to 50. For example, AWG 46 to AWG 42 (having an outer diameter of about 0.2 to 0.3 mm) can be used. Note that AWG is an abbreviation for American Wire Gauge, and is a standard widely used in the coaxial cable industry.

  In the wiring structure of the present invention, the number of the plurality of micro coaxial cables constituting the micro coaxial cable assembly divided into cable groups may be 4 or more as long as it is an even number (2N). As an example, FIG. 5 shows a case where 2N = 4.

  In the case of the wiring structure shown in FIG. 5, the plurality of micro coaxial cables C constituting the micro coaxial cable assembly 20 are arranged at the bending sliding portion F between the first alignment portion 21 and the second alignment portion 22. The alignment sections 21 and 22 are partitioned into four cable groups 23, 24, 25, and 26 in order from one end 21s, 22s to the other end 21t, 22t. Corresponding to these cable groups 23, 24, 25, 26, the first alignment portion 21 is divided into four regions 21 a, 21 b, 21 c, 21 d, and the second alignment portion 22 is also divided into four regions 22 a, 22 b, 22 c. , 22d.

Among these cable groups 23, 24, 25, 26, the micro coaxial cables C of the cable groups 23, 25 that are odd-numbered from the one ends 21 s, 22 s of both the alignment parts 21, 22 are The micro coaxial cables C of the cable groups 24 and 26 that are curved in the direction from the one end 21 s and 22 s toward the other end 21 t and 22 t and are even-numbered from the one ends 21 s and 22 s of both the alignment sections 21 and 22 21 and 22 are curved in the direction from the other ends 21t and 22t to the one ends 21s and 22s.
Any of the cable groups 23 to 26 overlaps with any of the other cable groups. For example, in the case of FIG. 6, the first cable group 23 overlaps the second cable group 24 and the fourth cable group 26, but the third cable group 25 overlaps only the fourth cable group 26. .

  When the number of the even number of cable groups 23 to 26 is 2N and n is an integer from 1 to N, the 2n-1th cable group and 2n are counted from one end 21s, 22s of both alignment portions 21, 22. The first cable group (specifically, the pair of the first cable group 23 and the second cable group 24, and the pair of the third cable group 25 and the fourth cable group 26) are mutually connected in FIGS. Therefore, the micro coaxial cable C overlaps at least two places within the range of sliding movement.

Even though the 2n-th cable group and the 2n + 1-th cable group (for example, the second cable group 24 and the third cable group 25) are adjacent to each other, they are curved away from each other. , 25 need not overlap, but overlap may occur during slide movement.
Since the 2n-1th cable group and the 2n + 2nd cable group (for example, the first cable group 23 and the fourth cable group 26) are not adjacent to each other but are curved in a direction approaching each other, the degree of curvature May overlap, but the overlap may be eliminated during the slide movement.

In any case, since all the cable groups 23 to 26 overlap at least one of the other cable groups, the cable groups 23 to 26 correspond to the movement of each cable C accompanying the sliding of the housings L and U. As a result of the combined effect of the limitation due to the overlapping of the 26 and the limitation due to the opposing surfaces P1 and P2 of the adjacent housings, the vertical relationship of the overlapping cable groups 23 to 26 is not easily disrupted. At the same time, the alignment order of the micro coaxial cables C in the respective cable groups 23 to 26 is also maintained.
As a result, entanglement and concentration of bending stress between the micro coaxial cables C hardly occur between the cable groups 23 to 26 and within each cable group 23 to 26, and the sliding movement of the housings L and U is repeated many times. However, the micro coaxial cable C is hard to be disconnected and has excellent bending durability. Even when the gap between the opposing surfaces P1 and P2 of the first casing L and the second casing U is 3 mm or less, cable damage and disconnection can be suppressed, and the service life can be extended.

In the case of the wiring structure of FIG. 5, when a certain cable group and another cable group overlap each other at a plurality of locations, the vertical relationship between these two cable groups is the same throughout all the overlapping portions. In this example, the odd-numbered cable groups 23 and 25 are on the lower side, and the even-numbered cable groups 24 and 26 are on the upper side.
Moreover, since all the cable groups 23, 24, 25, and 26 are accommodated between the pair of housings L and U as in the example of FIG. 3, the bending direction can be prevented from being reversed.

  In order to prevent reversal of the bending direction of the cable, there is a method in which the vertical relationship of the cable group is made different for each overlapping portion. For example, in the wiring structure shown in FIG. 8, the plurality of micro coaxial cables C constituting the micro coaxial cable assembly 30 are in the bending sliding portion F between the first alignment portion 31 and the second alignment portion 32. The cable groups 33 and 34 are divided into two cable groups 33 and 34, and the cable groups 33 and 34 are overlapped at two places, but the first cable group 33 is below the second cable group 34 at one overlap part. Yes, the first cable group 33 is on the upper side of the second cable group 34 in the other overlapping portion.

According to such a wiring structure, since the bending direction is limited by the mutual cable groups 33 and 34, inversion of the bending direction can be prevented even in a state where the casing is not close.
Further, a plurality of sets of wiring structures shown in FIG. 8 can be arranged in parallel so that the number of cable groups is four or more. That is, when the number of the even number of cable groups is 2N and n is an integer from 1 to N, the ultra-fine coaxial cable of the cable group corresponding to 2n-1th counted from one end of both alignment sections and both alignment sections The 2n-th micro-coaxial cable of the cable group counted from one end of the cable overlaps at two locations, one of which is the 2n-1 cable group above the 2n-th cable group and the other one is 2n- A wiring structure in which the first cable group is overlapped below the 2n-th cable group can be obtained.

The present invention relates to an electronic device formed by joining a plurality of casings having circuits in a slidable manner, and electrically connecting the circuits in these casings by an electric wire such as a micro coaxial cable. It can be used for mobile terminal devices such as Personal Digital Assistants) and wiring between housings of the electronic devices. The number of housings constituting the electronic device is not limited to two, and may be three or more.
For example, when the number of casings is three, the micro coaxial cable assembly and wiring structure of the present invention may be used as the inter-casing wiring between the first casing and the second casing. . Further, as the inter-housing wiring between the second housing and the third housing, the micro coaxial cable assembly and the wiring structure of the present invention may be used.

Hereinafter, the present invention will be specifically described with reference to examples.
Prepare 40 cores of AWG42 (outer diameter: 0.29mm) ultra-coaxial cable (single core), straighten it flat at a pitch of 0.4mm, and then remove the outer sheath of both ends to remove the center conductor and the outer conductor The outer conductor was sandwiched between a pair of ground bars at each end and soldered to form a connection portion, thereby obtaining a micro coaxial cable assembly of this example. The cable length (between the ground bars) of the portion where the cable can be bent between both connecting portions is 34 mm. In this example, a connector (model number: FI-J 40c) of Japan Aviation Electronics Industry (JAE) was attached to the connection part.

As a bending durability test apparatus, an apparatus was used in which the upper slide plate reciprocated in the horizontal direction relative to the lower fixed plate. The cable between the ground bars is divided into two bundles of 20 cores, the two bundles are bent as shown in FIG. 1, and the connector of one end of the micro coaxial cable assembly is placed on the upper slide plate and the connector of the other end is placed. Connected to the lower fixing plate.
The slide plate was slid (the curved portion of the cable was bent and stretched) with a slide length of 32 mm, a slide speed of 40 mm per second, a turn-back waiting time of 0 second, a cable wiring space (height) of 1.5 mm, and a target stop count of 150,000.

  When the above test was conducted, no disconnection or external damage was found in the micro coaxial cable assembly after the test. Moreover, when two cores were selected and the electrical resistance of the center conductor before and after the test was measured, as shown in Table 1, there was no noticeable change in the electrical resistance values of both # 1 and # 2, and the electrical disconnection occurred. No significant increase in resistance due to damage was found.

  Moreover, although the characteristic impedance was measured for the two cores # 1 and # 2, it was confirmed that there was no change between before and after the test.

  The present invention can be used for internal wiring of various electronic devices having a sliding structure.

(A), (b) is a top view which shows one example of the wiring structure of the micro coaxial cable assembly in the electronic device of this invention. (A)-(c) is a top view which shows an example of the wiring structure of the micro coaxial cable assembly in the electronic device of this invention. It is sectional drawing of the wiring structure of the micro coaxial cable assembly in the electronic device of this invention. It is a top view which shows an example of the wiring structure of the micro coaxial cable assembly in the electronic device of this invention, Comprising: The example of the structure which reinforced the boundary part of a bending sliding part and an alignment part. It is a top view which is an example of the wiring structure of the micro coaxial cable assembly in the electronic device of this invention, Comprising: The example which used four cable groups. An example of a micro coaxial cable assembly It is a top view which shows the example which has the terminal of a micro coaxial cable assembly in the outer side of an alignment part. It is a top view which shows an example of the wiring structure of the micro coaxial cable assembly in the electronic device of this invention, Comprising: The upper and lower relationship of the overlapping of cable groups differs.

Explanation of symbols

A, B ... slide direction, C ... micro coaxial cable, F ... bent sliding part, L ... first housing, M ... electronic device, P1, P2 ... opposite surface of the housing, U ... second housing 10, 10A, 20, 30 ... extra fine coaxial cable assembly, 1, 11, 21, 31 ... first alignment part, 11s, 21s, 31s ... one end, 11t, 21t, 31t ... other end, 2, 12, 22 , 32 ... second alignment section, 12s, 22s, 32s ... one end, 12t, 22t, 32t ... other end, 13, 23, 25, 33 ... odd-numbered cable groups counted from one end, 14, 24, 26, 34: An even-numbered cable group counted from one end.

Claims (4)

A micro coaxial cable assembly in which a plurality of micro coaxial cables are aligned in a row at each of a first alignment portion and a second alignment portion; a first housing connected to the first alignment portion; And a second casing to which two alignment portions are connected, and the first casing and the second casing can be reciprocated in a predetermined sliding direction along opposing surfaces of the first casing and the second casing. An attached electronic device,
In the plurality of micro coaxial cables, the bending sliding portions between the first alignment portion and the second alignment portion are opposed to each other of the first housing and the second housing. In the bent sliding portion, the plurality of micro coaxial cables are partitioned into an even number of cable groups in order from one end to the other end of both alignment portions,
Among them, the micro coaxial cables of the odd-numbered cable group counted from one end of both aligned parts are curved in the direction from one end of both aligned parts to the other end, and the even-numbered cable group counted from one end of both aligned parts. An electronic device, characterized in that a micro coaxial cable is curved in a direction from the other end of both alignment portions toward one end, and any cable group overlaps with any other cable group. The overlap between the cable groups, when a certain cable group and another cable group overlap at a plurality of locations, the vertical relationship between the certain cable group and the other cable group is the same throughout the plurality of locations,
Whether each of the cable groups is bent in a direction from one end to the other end of both alignment portions or in a direction from the other end to the one end, the first housing and the second housing are The electronic device according to claim 1, wherein the electronic device is held by a facing surface.   When the number of the even number of cable groups is 2N and n is an integer from 1 to N, the cable group corresponding to the (2n-1) -th counted from one end of both alignment sections and the one end of both alignment sections is counted. The 2n-th cable group overlaps at two locations, one of which is the 2n-1th cable group above the 2nth cable group, and the other one is the 2n-1th cable group at the 2nth. The electronic apparatus according to claim 1, wherein the electronic apparatus overlaps below the cable group. A micro coaxial cable assembly in which a plurality of micro coaxial cables are aligned in a row at each of a first alignment portion and a second alignment portion; a first housing connected to the first alignment portion; And a second casing to which two alignment portions are connected, and the first casing and the second casing can be reciprocated in a predetermined sliding direction along opposing surfaces of the first casing and the second casing. A wiring method for a micro coaxial cable assembly in an attached electronic device, comprising:
The plurality of micro coaxial cables are partitioned into an even number of cable groups in order from one end to the other end of both alignment portions at a bending sliding portion between the first alignment portion and the second alignment portion. In addition, the micro coaxial cables of the odd-numbered cable group counted from one end of both alignment portions are bent in the direction from one end to the other end of both alignment portions, and the even-numbered cable group counted from one end of both alignment portions. The micro coaxial cable is curved in a direction from the other end of both alignment portions toward one end, so that any cable group overlaps with any other cable group. Assembly wiring method.

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