JP5238364B2 - Micro-coaxial cable assembly, electronic device, and wiring method of micro-coaxial cable assembly - Google Patents

Description

  The present invention relates to an ultrafine coaxial cable assembly that can be used for a slide-structure housing, an electronic device using the assembly, and a wiring method of the ultrafine coaxial cable.

  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 outside 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

A configuration shown in FIG. 5 is conceivable as a proposal for allowing the micro coaxial cable assembly to correspond to a housing having a slide structure (described in an unpublished application by the present applicant). As shown in FIG. 5, the slide-structured housing includes a first housing 1 and a second housing 2, and reciprocates in a predetermined sliding direction D along opposing surfaces 1 a and 2 a facing each other. It has a structure that is movably attached.
In order to improve the bending durability characteristics of the micro coaxial cable assembly 5, the positions of the first connection portion 3 and the second connection portion 4 formed at both ends of the micro coaxial cable assembly 5 are laterally orthogonal to the sliding direction D. When shifted in the direction (left-right direction in FIG. 5), the curved shape of each micro coaxial cable spreads in the lateral direction at the bent portion, and the radius of curvature r can be increased.
However, in this case, the wiring space S required for the wiring of the micro coaxial cable assembly 5 also expands in the horizontal direction, and it is not possible to meet the demand for reducing the wiring space.

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

In order to solve the above-described problems, the present invention provides an ultra-fine fiber in which a plurality of micro-coaxial cables are aligned in a line at both terminals, and a first connection portion is formed at one terminal and a second connection portion is formed at the other terminal. A coaxial cable assembly,
The plurality of micro coaxial cables include a first cable group connected from one end side of the first connection portion to the center portion, and a first cable group connected from the center portion of the first connection portion to the other end side. Divided into two cable groups,
In the first coaxial cable of the first cable group, the one connected to one end of the first connecting portion is connected to the central portion of the second connecting portion, and the central portion of the first connecting portion is connected to the central portion of the first connecting portion. Arranged in order so that the connected one is connected to the other end of the second connecting portion,
The ultra-fine coaxial cable of the second cable group is connected to one end side of the second connection portion, and is connected to the center portion of the first connection portion, and the other end side of the first connection portion. Are arranged in order so that the one connected to the central portion of the second connection portion,
The first cable group and the second cable group are each divided into N small groups having the same number of 2 or more, and each of the small groups belonging to the first cable group is connected to the first connection group. The first small group to the Nth small group from one end side of the section toward the central section, and each small group belonging to the second cable group is directed from the central section of the first connection section to the other end side. N + 1 small group to 2N N small group, each small group belonging to the first cable group has an N + 1 small group between the first connecting portion and the second connecting portion. To the second N small group, and every time it intersects with a different small group on the second cable group side, the small group on the first cable group side and the small group on the second cable group side The subgroups of the second cable group are overlapped at the same time, and the subgroups belonging to the second cable group are Every time between the first connecting portion and the second connecting portion, it intersects in order from the Nth small group to the first small group, and intersects with a different small group on the first cable group side. An ultrafine coaxial cable assembly is provided in which the subgroups on the second cable group side and the subgroup on the first cable group side are interchanged and overlapped.

Further, the present invention includes a plurality each book a micro-coaxial cable at both terminals aligned in a line, the first connecting portion, the second micro coaxial cable assembly connection portion is formed on the other terminal to one terminal, A first casing connected to the first connection portion; and a second casing connected to the second connection portion; the first casing and the second casing; Is an electronic device which is attached so as to be reciprocally movable in a predetermined sliding direction along the opposing surfaces facing each other, and wherein the first connecting portion and the second connecting portion are arranged side by side in the sliding direction. There,
The micro coaxial cable assembly is folded back via a bent portion formed at a central portion in the longitudinal direction, and the bent portion is formed between the opposing surfaces of the first casing and the second casing. Is accommodated in a gap of 3 mm or less,
The direction from the first connection portion toward the bent portion and the direction from the second connection portion toward the bent portion are both the same direction along the slide direction,
The micro coaxial cable assembly includes the micro coaxial cable assembly, and the bent portion is formed at a portion where each small group of the first cable group intersects with each small group of the second cable group. An electronic device is provided.

Further, the present invention includes a plurality each book a micro-coaxial cable at both terminals aligned in a line, the first connecting portion, the second micro coaxial cable assembly connection portion is formed on the other terminal to one terminal, A first casing connected to the first connection portion; and a second casing connected to the second connection portion; the first casing and the second casing; Are mounted so as to be capable of reciprocating in a predetermined sliding direction along the opposing surfaces facing each other, and in the electronic device in which the first connecting portion and the second connecting portion are arranged side by side in the sliding direction A wiring method for a micro coaxial cable assembly,
After preparing the above-described micro coaxial cable assembly as the micro coaxial cable assembly, connecting the first connection portion to the first housing and the second connection portion to the second housing, respectively,
Forming a bent portion at a portion where each of the small groups of the first cable group and each of the small groups of the second cable group intersects, and returning from the first connecting portion toward the bent portion; The direction from the second connecting portion toward the bent portion is the same direction along the sliding direction, and the bent portion is connected to the first casing and the second casing. And a wiring method of the micro coaxial cable assembly, wherein the gap is accommodated in a gap of 3 mm or less between the facing surfaces.

According to the present invention, since a plurality of micro coaxial cables are divided into an even number of small groups of 4 or more and intersected with each other at the central portion, the curvature radius of the folded portion is accommodated in a gap of 3 mm or less. Even in this case, excellent bending durability characteristics are exhibited.
Since the ultra-fine coaxial cable assembly can be folded and wired, it is also possible to support a housing having a structure in which the connecting portions of both terminals are arranged side by side on the same axis in the sliding direction. Wiring space can be reduced.

The present invention will be described below with reference to the drawings based on the best mode.
FIG. 1 shows an example of a micro coaxial cable assembly 10 according to the present invention. This micro coaxial cable assembly 10 has a structure in which a plurality of micro coaxial cables C are arranged in a line at both ends, and a first connection portion 11 is formed at one end and a second connection portion 12 is formed at the other end. Have

  A plurality of micro coaxial cables C are connected to the first cable group G1 connected to the region 11d from the one end side 11a of the first connection portion 11 to the center portion 11c, and from the center portion 11c of the first connection portion 11. It is partitioned into a second cable group G2 connected to a region 11e up to the other end side 11b. The micro coaxial cable C of the first cable group G1 is connected to a region 12e from the central portion 12c of the second connection portion 12 to the other end side 12b. Further, the micro coaxial cable C of the second cable group G2 is connected to a region 12d from the one end side 12a of the second connection portion 12 to the central portion 12c.

  The arrangement of each micro coaxial cable C is as follows. As for the micro coaxial cable C of the first cable group G1, the one connected to the one end side 11a of the first connection part 11 is connected to the center part 12c of the second connection part 12, and the first connection part 11 It arranges in order so that what was connected to the center part 11c may be connected to the other end side 12b of the 2nd connection part 12. FIG. Further, the micro coaxial cable C of the second cable group G2 is connected to the one end side 12a of the second connection portion 12 that is connected to the central portion 11c of the first connection portion 11, and the first connection portion. 11 are arranged in order so that what is connected to the other end 11b of the 11 is connected to the central portion 12c of the second connecting portion 12.

The first cable group G1 and the second cable group G2 are divided into N small groups each having the same number of 2 or more. That is, in the entire micro coaxial cable assembly 10, each micro coaxial cable C is partitioned into 2N small groups. FIG. 1 shows an example of N = 2, and the number of small groups 13 to 16 is four.
In FIG. 1, in order to clearly indicate the sections of each small group, the connection portions 11 and 12 are illustrated as having a gap between the small groups 13 to 16. There is no need to increase the pitch, and all the micro coaxial cables C can be arranged at equal intervals.

In order to explain the technical idea of the present invention, 2N (four) small groups 13 to 16 are numbered from 1 to 2N as follows.
The small groups 13 and 14 belonging to the first cable group G1 are arranged in order from 1 to N in order from the first small group 13 to the second small group 14 from the one end side 11a of the first connecting portion 11 toward the central portion 11c. Number up to. Further, the small groups 15 and 16 belonging to the second cable group G2 are moved in order from the third small group 15 to the fourth small group 16 from the central portion 11c of the first connecting portion 11 toward the other end side 11b. Number from N + 1 to 2N.
That is, when the numbers from 1 to 2N are assigned in order from the one end side 11a to the other end side 11b of the first connecting portion 11, the first cable group G1 is defined by the first small group to the Nth small group. The second cable group G2 is configured from the (N + 1) th small group to the second Nth small group.
Each of the small groups 13 to 16 preferably includes a plurality of micro coaxial cables C.

The small groups 13 and 14 belonging to the first cable group G1 are connected to the small groups 15 and 16 belonging to the second cable group G2 between the first connection portion 11 and the second connection portion 12, respectively. Each time it intersects in the order from the third small group 15 to the fourth small group 16 (in order of increasing the number of the small group), and every time it intersects with different small groups 15 and 16 on the second cable group G2 side. The upper and lower relationships of the small groups 13 and 14 on the first cable group G1 side and the small groups 15 and 16 on the second cable group G2 side are exchanged and overlapped.
Specifically, when intersecting with the small groups 15 and 16 on the second cable group G2 side, the first small group 13 is moved from the lower side of the third small group 15 to the upper side of the fourth small group 16, The small group 14 switches the vertical relationship from the upper side of the third small group 15 to the lower side of the fourth small group 16.

At the same time, each of the small groups 15 and 16 belonging to the second cable group G2 has a small group 13 belonging to the first cable group G1 between the first connecting portion 11 and the second connecting portion 12. , 14 in the order from the second small group 14 to the first small group 13 (the order in which the numbers of the small groups decrease), and different small groups 14, 13 on the first cable group G1 side Every time they intersect, the subgroups 15 and 16 on the second cable group G2 side and the subgroups 14 and 13 on the first cable group G1 side are exchanged to overlap each other.
Specifically, when intersecting with the small groups 14 and 13 on the first cable group G1 side, the third small group 15 moves from the lower side of the second small group 14 to the upper side of the first small group 13, and the fourth The small group 16 interchanges the vertical relationship from the upper side of the second small group 14 to the lower side of the first small group 13.

  In this way, when the first cable group G1 and the second cable group G2 are crossed, the small groups 13 to 16 of the first cable group G1 are overlapped by combining a plurality of small groups 13 to 16, respectively. It is possible to prevent the arrangement of the micro coaxial cables C from being disturbed and disconnected at a portion 17 where 14 and the small groups 15 and 16 of the second cable group G2 intersect.

The micro coaxial cable assembly 10 can be suitably used as an internal wiring of an electronic device having a sliding structure housing.
FIG. 2 is a perspective view showing a schematic configuration example of the electronic apparatus M using the micro coaxial cable assembly 10 of the present embodiment.

  The electronic device M shown in FIG. 2 is attached so that the first housing 1 and the second housing 2 can reciprocate in a predetermined sliding direction D along their opposing surfaces 1a and 2a. Between the first housing 1 and the second housing 2, a micro coaxial cable assembly 10 in which connection portions 11 and 12 are formed at the respective terminals is wired, and the first connection portion 11 is the first connection portion 11. The second connection portion 12 is coupled to the second housing 2. Specifically, a circuit (not shown) is accommodated in each of the housings 1 and 2, and the circuit side connection portion connected to the circuit is connected to the connection portions 11 and 12 of the micro coaxial cable assembly 10. Thus, the circuit in the first casing 1 and the circuit in the second casing 2 are connected via the micro coaxial cable assembly 10. For connection between the circuit side connection portion and the connection portions 11 and 12 of the micro coaxial cable assembly 10, an appropriate method such as connector or soldering can be used. Here, the slide movement mode is preferably a reciprocating linear movement.

The micro coaxial cable assembly 10 is folded back via a bent portion F formed at the center in the longitudinal direction, and the bent portion F is formed on the opposed surfaces 1a of the first casing 1 and the second casing 2. It is accommodated between 2a. According to this embodiment, the micro coaxial cable assembly 10 has the configuration shown in FIG. 1, and each of the small groups 13 and 14 of the first cable group G1 and each of the small groups 15 and 16 of the second cable group G2. It is formed at the intersecting portion 17. For this reason, it is excellent in bending durability characteristics.
Therefore, even when the gap between the facing surfaces 1a and 2a of the first housing 1 and the second housing 2 is 3 mm or less and the curvature radius of the bent portion F is about 1 mm, the cable is damaged or disconnected. Can be suppressed and the life can be extended.

  The first connection part 11 and the second connection part 12 are arranged side by side in the slide direction D. The direction from the first connecting portion 11 toward the bent portion F and the direction from the second connecting portion 12 toward the bent portion F are all in the same direction along the sliding direction D (in FIG. 2, along the sliding direction D). Out of the direction). Accordingly, the connecting portions 11 and 12 and the bent portion F are arranged side by side in the sliding direction D, and the bent portion F is positioned above the connecting portions 11 and 12 in the entire range in which the housings 1 and 2 slide.

When the circuit side connection portion is accommodated inside the housings 1 and 2, the first connection portion 11 and the second connection portion 12 are also arranged inside the housings 1 and 2. For this reason, the housings 1 and 2 can be provided with openings (not shown) into which the micro coaxial cable assembly 10 is inserted. Since the opening portions of the housings 1 and 2 are arranged between the bent portion F and the connection portions 11 and 12, the opening portions are also arranged in the slide direction D together with the bent portion F and the connection portions 11 and 12. Be placed.
For this reason, the wiring space S in the lateral direction (the direction orthogonal to the sliding direction D on the opposing surfaces 1 a and 2 a) can be about the same as the width of the micro coaxial cable assembly 10.

  FIG. 3 shows a partially enlarged view of the bent portion F of the micro coaxial cable assembly 10 in the electronic apparatus M of FIG. 3A is a view as seen from the A direction (front-rear direction) in FIG. 2, and FIG. 3B is a view as seen from the B direction (lateral direction) in FIG.

  As shown in FIG. 3A, at the bent portion F of the micro coaxial cable assembly 10, the small groups 13 and 14 of the first cable group G1 and the small groups 15 and 16 of the second cable group G2 are connected. The positions where the individual micro coaxial cables are connected to the first connecting portion 11 and the positions where the individual connecting portions are connected to the second connecting portion 12 are laterally shifted. For this reason, as shown in FIG. 3B, the bending height F of the bent portion F remains 3 mm or less, and the bending of each of the micro coaxial cables at the bent portion F is the same as the structure shown in FIG. The shape spreads in the lateral direction, and the radius of curvature r of each individual micro coaxial cable can be increased. As a result of investigations by the present inventors, when bundling ultrafine cables, the bending radius for satisfying the durability with respect to many (for example, 100,000 times or more) sliding times (number of bending times) needs to be 5 mm or more. The bending radius of that degree can be maintained even if the bending is repeated.

In addition, as a whole, the fine coaxial cable assembly 10 has a small expansion of the wiring space S even in the bent portion F, and can be about the same as the width of the fine coaxial cable assembly 10.
Moreover, compared with the case where the fine coaxial cable C is separated at the bent portion F and is not bundled at all, the arrangement of the fine coaxial cable C is regulated by combining each small group 13 to 16 by intersecting at the bent portion F. Therefore, irregular entanglement of the micro coaxial cable C hardly occurs, and disconnection due to concentration of bending stress hardly occurs.
Furthermore, since a binding member such as an adhesive tape, an adhesive, or a string is not required, the bending position of each micro coaxial cable C can be varied within the range in which the intersections of the small groups 13 to 16 are maintained, and there is a bending wrinkle. The effect of being difficult is also conceivable.

  In order to configure the wiring structure of the micro coaxial cable assembly 10 in the electronic apparatus M as shown in FIGS. 2 and 3, the sub-groups 13 and 14 of the first cable group G1 and It is preferable to prepare a micro coaxial cable assembly 10 having a structure in which each of the small groups 15 and 16 of the second cable group G2 intersects, and to incorporate and connect them to the casings 1 and 2.

As an example of the assembly procedure, a procedure having the following steps (1) and (2) may be mentioned.
(1) connecting the first connection portion 11 of the micro coaxial cable assembly 10 to the first housing 1 and the second connection portion 12 to the second housing 2;
(2) A bent portion F is formed at a portion 17 where each of the small groups 13 and 14 of the first cable group G1 and each of the small groups 15 and 16 of the second cable group G2 intersect to form the micro coaxial cable assembly 10. Each of the micro coaxial cables is folded back, and the direction from the first connection portion 11 toward the bending portion F and the direction from the second connection portion 12 toward the bending portion F are all the same direction along the slide direction D. Thus, the process of accommodating the bending part F in the space | interval of 3 mm or less between the opposing surfaces 1a and 2a of the 1st housing | casing 1 and the 2nd housing | casing 2. FIG.

Another example of the assembling procedure is a procedure having the following steps (1 ′) to (4 ′).
(1 ′) connecting the first connection portion 11 of the micro coaxial cable assembly 10 to the first housing 1;
(2 ′) The micro coaxial cable assembly 10 is formed by forming a bent portion F at a portion 17 where the small groups 13 and 14 of the first cable group G1 and the small groups 15 and 16 of the second cable group G2 intersect. The process of turning back each micro coaxial cable
(3 ′) connecting the second connecting portion 12 of the micro coaxial cable assembly 10 to the second housing 2;
(4 ′) The direction from the first connecting portion 11 toward the bent portion F and the direction from the second connecting portion 12 toward the bent portion F are all the same direction along the slide direction D. The process which accommodates the bending part F in the space | interval of 3 mm or less between the opposing surfaces 1a and 2a of the 1st housing | casing 1 and the 2nd housing | casing 2. FIG.

In the above assembly procedure examples (1 ′) to (4 ′), (1 ′) and (3 ′) may be reversed and the connection to the second housing 2 may be performed first.
In addition, an arbitrary procedure can be adopted according to the structures of the casings 1 and 2 and the connection portions 11 and 12.

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 micro coaxial cable assembly of the present invention, the number N dividing the first cable group G1 and the second cable group G2 into small groups may be 3 or more. FIG. 4 shows a case where N = 3.

  In the micro coaxial cable assembly 20 shown in FIG. 4, the cables are divided into six small groups as a whole, and are connected to a region 21d from one end side 21a of the first connecting portion 21 to the central portion 21c. The third small group 23, 24, 25 belongs to the first cable group G1, and the fourth to sixth small groups 26, 26 connected to the region 21e from the central portion 21c of the first connection portion 21 to the other end side 21b. 27 and 28 belong to the second cable group G2. On the second connecting portion 22 side, the first to third small groups 23 to 25 are connected to a region 22e from the central portion 22c to the other end side 22b, and the fourth to sixth small groups 26 to 28 are connected to one end side 22a. To the region 22d from the center portion 22c.

  The small groups 23 to 25 belonging to the first cable group G1 are connected to the small groups 26 to 28 belonging to the second cable group G2 between the first connecting portion 21 and the second connecting portion 22. Each time it intersects in the order from the fourth small group 26 to the sixth small group 28 (the order in which the numbers of the small groups increase) and intersects with different small groups 26 to 28 on the second cable group G2 side. The upper and lower relations of the small groups 23 to 25 on the first cable group G1 side and the small groups 26 to 28 on the second cable group G2 side are switched and overlapped. At the same time, the small groups 26 to 28 belonging to the second cable group G2 are arranged between the first connecting portion 21 and the second connecting portion 22 to each small group 23 belonging to the first cable group G1. To 25, which intersect in the order from the third small group 25 to the first small group 23 (the order in which the numbers of the small groups decrease), and different small groups 25 to 23 on the first cable group G1 side Each time the crossing occurs, the small groups 26 to 28 on the second cable group G2 side and the small groups 25 to 23 on the first cable group G1 side are exchanged to overlap each other.

  As described above, when the first cable group G1 and the second cable group G2 are crossed, the plurality of small groups 23 to 28 are combined and overlapped, so that each of the small groups 23 to 28 of the first cable group G1 is overlapped. 1 can be prevented from being disturbed or broken in the arrangement 29 of the fine coaxial cables C at the portion 29 where the small groups 26 to 28 of the second cable group G2 intersect each other. The same effect as the assembly 10 is exhibited.

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.
After preparing 66 cores of AWG46 (outer diameter: 0.24 mm) ultra-fine coaxial cable (single core) and arranging the wires flatly at a pitch of 0.3 mm, they are divided into 17 cores × 2 bundles and 16 cores × 2 bundles, These four bundles were crossed as shown in FIG. The outer conductor of both ends is removed to expose the central conductor and the outer conductor, and the outer conductor is sandwiched between a pair of ground bars for each terminal and soldered to form a connection portion. A cable assembly was obtained. The cable length of the portion where the cable can be bent between the two connection portions is 32 mm.

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 center portion of the sample micro coaxial cable assembly was bent, and one end of the micro coaxial cable assembly was connected to the upper slide plate and the other end was connected to the lower fixed plate. The bent portion of the ultrafine coaxial cable assembly was accommodated between the upper slide plate and the lower fixed plate at a vertical interval of 3 mm.
The slide plate was slid (cable bent) with a slide length of 32 mm, slide speed of 40 mm per second, turn-back waiting time of 0 second, cable wiring space (height) of 3.0 mm, and target stop count of 200,000 times.

  When the above test was conducted, no disconnection or external damage was found in the micro coaxial cable assembly after the test. In addition, when the electrical resistance before and after the test was measured with 2 cores selected, as shown in Table 1, there was no noticeable change in the electrical resistance values of both the central conductor and the external conductor for # 1 and # 2, and the electrical resistance In particular, no significant increase in resistance due to disconnection or 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.

It is a front view which shows the example of 1 form of the micro coaxial cable assembly of this invention. It is a perspective view which shows the example of schematic structure of the electronic device using the micro coaxial cable assembly of this form example. 2 shows a bent portion of the micro coaxial cable assembly in the electronic device of FIG. 2, wherein (a) is a partially enlarged view of the bent portion viewed in the A direction of FIG. 2 and (b) is a B direction of FIG. It is a front view which shows another example of a form of the micro coaxial cable assembly of this invention. It is a perspective view which shows the example of schematic structure of the electronic device wired by shifting the position of the both ends of a microfine coaxial cable assembly to the horizontal direction.

Explanation of symbols

D ... sliding direction, F ... bent part, G1 ... first cable group, G2 ... second cable group, M ... electronic device, 1,2 ... housing, 1a, 2a ... facing surface, 10,20 ... extremely fine Coaxial cable assembly, 11, 21... First connection portion, 11a, 21a ... One end side, 11b, 21b ... Other end side, 11c, 21c ... Central portion, 12, 22 ... Second connection portion, 12a, 22a ... One end side, 12b, 22b ... the other end side, 12c, 22c ... central part, 13-16, 23-28 ... small group, 17, 29 ... crossing part.

Claims (3)

A micro coaxial cable assembly in which a plurality of micro coaxial cables are aligned in a row at both terminals, a first connection portion is formed on one terminal, and a second connection portion is formed on the other terminal,
The plurality of micro coaxial cables include a first cable group connected from one end side of the first connection portion to the center portion, and a first cable group connected from the center portion of the first connection portion to the other end side. Divided into two cable groups,
In the first coaxial cable of the first cable group, the one connected to one end of the first connecting portion is connected to the central portion of the second connecting portion, and the central portion of the first connecting portion is connected to the central portion of the first connecting portion. Arranged in order so that the connected one is connected to the other end of the second connecting portion,
The ultra-fine coaxial cable of the second cable group is connected to one end side of the second connection portion, and is connected to the center portion of the first connection portion, and the other end side of the first connection portion. Are arranged in order so that the one connected to the central portion of the second connection portion,
The first cable group and the second cable group are each divided into N small groups having the same number of 2 or more, and each of the small groups belonging to the first cable group is connected to the first connection group. The first small group to the Nth small group from one end side of the section toward the central section, and each small group belonging to the second cable group is directed from the central section of the first connection section to the other end side. N + 1 small group to 2N N small group, each small group belonging to the first cable group has an N + 1 small group between the first connecting portion and the second connecting portion. To the second N small group, and every time it intersects with a different small group on the second cable group side, the small group on the first cable group side and the small group on the second cable group side The subgroups of the second cable group are overlapped at the same time, and the subgroups belonging to the second cable group are Every time between the first connecting portion and the second connecting portion, it intersects in order from the Nth small group to the first small group, and intersects with a different small group on the first cable group side. An ultrafine coaxial cable assembly, wherein the subgroup on the second cable group side and the subgroup on the first cable group side are switched and overlapped. Align in a row each of the plurality of micro coaxial cable at both terminals, a first connecting portion, and the micro-coaxial cable assembly in which the second connecting portion is formed on the other terminal, the first connecting portion to the one terminal Are connected to each other, and the second casing is connected to the second connecting portion, and the first casing and the second casing face each other. An electronic device is attached so as to be able to reciprocate in a predetermined slide direction along the opposing surface, and the first connection portion and the second connection portion are arranged side by side in the slide direction,
The micro coaxial cable assembly is folded back via a bent portion formed at a central portion in the longitudinal direction, and the bent portion is formed between the opposing surfaces of the first casing and the second casing. Is accommodated in a gap of 3 mm or less,
The direction from the first connection portion toward the bent portion and the direction from the second connection portion toward the bent portion are both the same direction along the slide direction,
The micro coaxial cable assembly includes the micro coaxial cable assembly according to claim 1, and each of the small groups of the first cable group and each of the small groups of the second cable group intersect each other at the bent portion. An electronic device characterized by being formed in a part. Align in a row each of the plurality of micro coaxial cable at both terminals, a first connecting portion, and the micro-coaxial cable assembly in which the second connecting portion is formed on the other terminal, the first connecting portion to the one terminal Are connected to each other, and the second casing is connected to the second connecting portion, and the first casing and the second casing face each other. Wiring of a micro coaxial cable assembly in an electronic device that is mounted so as to be reciprocally movable in a predetermined sliding direction along the facing surface, and in which the first connecting portion and the second connecting portion are arranged side by side in the sliding direction A method,
The micro coaxial cable assembly according to claim 1 is prepared as the micro coaxial cable assembly, and the first connection portion is connected to the first housing and the second connection portion is connected to the second housing. After
Forming a bent portion at a portion where each of the small groups of the first cable group and each of the small groups of the second cable group intersects, and returning from the first connecting portion toward the bent portion; The direction from the second connecting portion toward the bent portion is the same direction along the sliding direction, and the bent portion is connected to the first casing and the second casing. A method for wiring a micro coaxial cable assembly, wherein the gap is accommodated in a gap of 3 mm or less between the facing surfaces.

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