JP2009044503A - Wiring structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a wiring structure that holds and fixes a flexible cable with no cable holding component without hindering reduction in thickness of a television or the like while suppressing noise and unwanted radiation. <P>SOLUTION: A sheet metal 5 supports a sub-substrate 4 with a space. The sheet metal 5 is fixed on a main substrate 3 with a space. A flexible cable 7 of a power supply line connecting the main substrate 3 with the sub-substrate 4 and a flexible cable 8 of a signal line are crossed each other. A part of the sheet metal 5 is sandwiched between the intersect parts 7a, 8a of both of the flexible cables 7, 8. The intersect parts 7a, 8a of both of the flexible cables are shielded by a part of the sheet metal 5 so as to suppress noise. The gap between the intersect parts 7a, 8a is as thick as the sheet metal 5 so as not to hinder thickness reduction. The flexible cables 7, 8 are inserted into each opening part 5c, 5c, 5d, and 5d formed in the sheet metal 5 so as to hold them. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an improvement in a wiring structure in which a flexible cable for a power supply line and a flexible cable for a signal line that connect a main board and a sub board are crossed and routed.

  In a thin TV or the like with a digital TV module (hereinafter referred to as a DTV module) that releases a scramble by inserting a card, a main analog board is provided therein, and a sub DTV module is provided on the main board. The substrate is attached to the sheet metal. As described above, a thin television or the like in which a sub-board is mounted on a main board often employs a wiring structure in which a flexible cable for a power supply line and a flexible cable for a signal line that connect both boards are crossed.

  On the other hand, a portable television receiver has been proposed in which a spacer is interposed between a flexible flat cable and a tuner to keep both of them at a certain distance or more and prevent intrusion of noise between them (Patent Document). 1).

A pocketable television receiver in which a tuner unit, a linear unit, and a chassis unit are connected by a single flexible cable, and a power circuit unit, a display unit, and a linear unit are connected by another flexible cable (Patent Document 2). ), Or by configuring the chassis as a plurality of independent chassis, dividing the circuit board into a plurality of block boards and attaching them to the plurality of chassis, respectively, to a flexible cable resulting from a change in positional relationship caused by a difference in thermal expansion coefficient There has also been proposed a flat display device (Patent Document 3) that reduces the burden of the above.
JP 2000-175127 A JP 62-10976 A JP 2006-195177 A

  However, in the wiring structure in which the flexible cable of the power line connecting the main board and the sub board and the flexible cable of the signal line are routed as described above, induction from the flexible cable of the power line to the flexible cable of the signal line occurs. However, there is a problem that the signal is deteriorated due to noise, and there is a problem that unnecessary radiation from the flexible cable of the power supply line cannot be suppressed.

  In the above wiring structure, since it is necessary to hold and fix both flexible cables using cable holding parts, there is a problem that the number of parts and the number of assembling steps increase, resulting in an increase in manufacturing cost. .

  The above problems are not solved by the techniques of Patent Documents 2 and 3, but for the noise problem, a spacer is interposed at the intersection of both flexible cables by applying the noise prevention technique in Patent Document 1. If the distance between the intersections is kept above a certain level, it can be solved. However, even if the crossing part of both flexible cables is kept at a certain distance or more, the crossing part is not shielded, so it is difficult to say that the noise prevention effect is sufficient. However, there is a problem that the thinning of the television is hindered, and since the spacer is used, there is a problem that the number of parts is increased and the cost is increased.

  The present invention has been made under the circumstances described above, and the problem to be solved is that it can suppress noise and unnecessary radiation, does not hinder the thinning of TVs, etc., and is flexible without using cable holding parts. An object of the present invention is to provide a wiring structure capable of holding and fixing a cable.

  In order to solve the above-described problems, the wiring structure according to the present invention supports a sheet metal plate in a state where the sub board is floated, fixes the sheet metal on the main board with a gap, and connects the main board and the sub board. In a wiring structure in which a flexible cable for a power line and a flexible cable for a signal line are crossed and routed, a part of the sheet metal is sandwiched between intersections of the flexible cable for the power line and the flexible cable for the signal line. It is a feature.

  In the wiring structure of the present invention, the sheet metal is provided with a set of openings in a positional relationship facing each other and another set of openings in a positional relationship facing in a direction crossing the facing direction of the openings. The flexible cable of the power line and the flexible cable of the signal line are inserted into one set of openings and the other set of openings, and a part of the sheet metal is sandwiched between the intersections of the two flexible cables. It is preferable.

  Then, both flexible cables are connected to each other so that the intersection of the flexible cables of the power line is on the upper side of the sheet metal and the intersection of the flexible cables of the signal line is on the lower side of the sheet metal. More preferably, the sheet metal is inserted through a set of openings and the other set of openings, and a part of the sheet metal is sandwiched between intersecting portions of both flexible cables.

  Moreover, it is also preferable to form the cable fixing piece which fixes both flexible cables in the said opening part.

  Since a typical example of an electronic apparatus in which the wiring structure of the present invention is adopted is a thin TV with a DTV module, a preferred specific example of the main board is an analog board incorporated in the thin TV, A preferred embodiment is a DTV module substrate supported on the sheet metal and mounted on an analog substrate.

  As in the wiring structure of the present invention, when a part of the sheet metal supporting the sub-board is sandwiched at the intersection of the flexible cable of the power line and the flexible cable of the signal line, both of the sheet metal are supported by the part of the sheet metal. Since the crossing portion of the flexible cable is shielded, induction from the flexible cable of the power supply line to the flexible cable of the signal line is suppressed, and signal deterioration due to noise hardly occurs. In addition, since a part of the sheet metal that supports the sub-board is used as a shield plate, it is not necessary to use a separate shield component, and an increase in cost can be suppressed. In addition, since only a part of the sheet metal is sandwiched between the intersecting portions of the two flexible cables, there is no concern that the thinning of the television is hindered as in the case where the distance between the intersecting portions is greatly widened by the spacer.

  Then, on the sheet metal, a set of openings having a positional relationship facing each other and another set of openings having a positional relationship facing each other in a direction crossing the facing direction of the opening are formed, In a wiring structure in which the flexible cable of the power line and the flexible cable of the signal line are inserted into the opening and another set of openings, and a part of the sheet metal is sandwiched between the intersections of the two flexible cables, both flexible cables Are held in these openings, it becomes unnecessary to separately hold both flexible cables using separate cable holding parts, and an increase in cost can be suppressed.

  Furthermore, the flexible cables of the power supply line are placed on the upper side of the sheet metal, and the flexible cables of the signal line are placed on the lower side of the sheet metal so that both flexible cables are connected to a pair of openings. In a wiring structure in which a part of the sheet metal is sandwiched between the intersections of the two flexible cables and inserted through another set of openings, the flexible cable of the power line is routed to the lower side of the sheet metal except for the intersections. Therefore, unnecessary radiation from the flexible cable of the power supply line can be suppressed.

  Moreover, what formed the cable fixing piece in the said opening part of a sheet metal can fix a flexible cable reliably with a cable fixing piece.

  Hereinafter, specific embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a schematic explanatory view of a thin TV with a DTV module adopting the wiring structure of the present invention, FIG. 2 is a plan view showing a wiring structure according to an embodiment of the present invention in which a DTV module substrate is omitted, and FIG. A partially enlarged sectional view of a sheet metal in the wiring structure, FIG. 4 is a schematic explanatory view of the wiring structure.

  The wiring structure of the present invention is preferably adopted for a thin TV with a DTV module as shown in FIG. 1, for example, and the flat TV with a DTV module has a liquid crystal module 2 at the front opening of a front cabinet 1. Is attached to the back surface of the liquid crystal module 2 as a main substrate 3 with a predetermined interval. On the main substrate 3 (on the back side), a DTV module substrate as a sub-substrate 4 is supported and attached to a sheet metal 5.

  More specifically, the sub-substrate (DTV module substrate) 4 is supported by support pieces 5a formed at the four corners of the rectangular metal plate 5 and floats from the metal plate 5 as shown in FIGS. It is screwed and covered with a sheet metal lid 6 that suppresses unwanted radiation. The sheet metal 5 is fixed to the corners of the main board 3 with a gap by screwing the five leg pieces 5b to the main board 3 with screws.

  As shown in FIGS. 2 and 3, the sheet metal 5 is opposed to a pair of rectangular openings 5c and 5c having a positional relationship facing each other and in a direction perpendicular to the facing direction of the openings 5c and 5c. Another set of rectangular openings 5d, 5d having a positional relationship is formed, and cable fixing pieces 5e are formed by cutting out the rectangular openings 5c, 5c, 5d, 5d. As will be described later, the cable fixing piece 5e bends when the flexible cables 7 and 8 are inserted into the rectangular openings 5c, 5c, 5d, and 5d, presses the inserted flexible cables 7 and 8, and the friction force The flexible cables 7 and 8 are fixed.

  As shown in FIG. 2, the flat flexible cable 7 of the power line has a pair of rectangular openings 5 c and 5 c so that the intersecting portion 7 a that intersects the flexible cable 8 of the signal line at a right angle is on the upper side of the sheet metal 5. The connector portions 7b and 7c at both ends thereof are connected to the main board (analog board) 3 and the sub board (DTV module board) 4 respectively. Yes.

  On the other hand, the flat flexible cable 8 of the signal line has another set of rectangular openings 5d and 5d so that the intersecting portion 8a that intersects the flexible cable 7 of the power supply line at a right angle is below the sheet metal 5. The connector portions 8b and 8c at both ends thereof are connected to the main board 3 and the sub board 4, respectively.

  As described above, the flexible cable 7 of the power line and the flexible cable 8 of the signal line are crossed so that the intersecting portion 7a of the flexible cable 7 of the power line is on the upper side of the sheet metal, and the flexible cable 8 of the signal line When the flexible cables 7 and 8 are inserted through the rectangular openings 5c, 5c, 5d and 5d and drawn so that the intersecting portion 8a is on the lower side of the sheet metal 5, the intersecting portion 7a of the both flexible cables 7 and 8 is drawn. , 8a, a part of the sheet metal 5, that is, a part surrounded by the four rectangular openings 5c, 5c, 5d, 5d is sandwiched.

  In this wiring structure, since both the crossing portions 7a and 8a are shielded by a part of the sheet metal 5 sandwiched between the crossing portions 7a and 8a of the both flexible cables 7 and 8, as described above, Induction of the signal line from the flexible cable 7 to the flexible cable 8 is suppressed, and signal degradation due to noise hardly occurs. And since the flexible cable 7 of the power supply line is routed to the lower side of the sheet metal 5 except for the intersecting portion 7a, unnecessary radiation can be sufficiently suppressed. In addition, since only a part of the sheet metal is sandwiched between the intersecting portions of the two flexible cables, there is no concern that the thinning of the television is prevented as in the case where the distance between the intersecting portions is greatly widened by the spacer.

  Further, when a part of the sheet metal 5 is used as a shield plate as in this wiring structure, it is not necessary to shield the intersecting portions 7a and 8a of the flexible cables 7 and 8 by using a separate shield component. The increase can be suppressed. In addition, as in this wiring structure, when both the flexible cables 7 and 8 are inserted through the rectangular openings 5c, 5c, 5d, and 5d and drawn, both the flexible cables 7 and 8 are held by these rectangular openings. Therefore, it becomes unnecessary to separately hold the flexible cables 7 and 8 using a cable holding component, and the increase in cost can be further suppressed. In particular, when the cable fixing piece 5e is formed in the rectangular openings 5c, 5c, 5d, 5d as in this embodiment, the flexible cables 7, 8 inserted through the rectangular openings are bent cable fixing pieces. There is an advantage that it is pressed by 5e and reliably held and fixed by its frictional force.

  The flexible cables 7 and 8 are turned upside down, and the flexible cable 7 is routed to the upper side of the sheet metal 5 so that the intersection 7a of the flexible cable 7 of the power supply line is on the lower side of the sheet metal 5. It is also possible to route the flexible cable 8 to the lower side of the sheet metal so that the intersecting portion of the flexible cable 8 is on the upper side of the sheet metal 5. However, in this case, it is difficult to suppress unnecessary radiation, which is not preferable.

It is a schematic explanatory drawing of the thin television with a DTV module which employ | adopted the wiring structure of this invention. It is a top view which shows the wiring structure which concerns on one Embodiment of this invention which abbreviate | omitted the DTV module board | substrate. It is a partial expanded sectional view of the sheet metal in the same wiring structure. It is a schematic explanatory drawing of the same wiring structure.

Explanation of symbols

3 Main board (analog board)
4 Sub board (DTV module board)
DESCRIPTION OF SYMBOLS 5 Sheet metal 5a Support piece 5b Leg piece 5c, 5c One set of opening 5d, 5d Another set of opening 5e Cable fixing piece 7 Flexible cable of power supply line 8 Flexible cable of signal line

Claims (5)

  Support the sub-board in a state where it is floated on the sheet metal, fix this sheet metal on the main board with a gap, and cross the flexible cable of the power line and the signal line connecting the main board and the sub-board. In the routed wiring structure, a part of the sheet metal is sandwiched between intersections of the flexible cable of the power line and the flexible cable of the signal line.   On the sheet metal, a pair of opening portions having a positional relationship facing each other and another pair of opening portions having a positional relationship facing each other in a direction intersecting the facing direction of the opening portion are formed, and the one set of opening portions The flexible cable of the power line and the flexible cable of the signal line are inserted into the other set of openings, and a part of the sheet metal is sandwiched between the intersections of the two flexible cables. The wiring structure according to 1.   The flexible cables are connected to each other so that the intersection of the flexible cables of the power supply line is on the upper side of the sheet metal and the intersection of the flexible cables of the signal line is on the lower side of the sheet metal. 3. The wiring structure according to claim 2, wherein a part of the sheet metal is inserted into an opening and the other set of openings, and a part of the sheet metal is sandwiched between intersecting portions of both flexible cables.   The wiring structure according to claim 2 or 3, wherein a cable fixing piece for fixing both flexible cables is formed in the opening.   The main board is an analog board incorporated in a TV with a digital TV module, and the sub board is a digital TV module board supported on the sheet metal and mounted on the analog board. The wiring structure according to any one of claims 1 to 4.

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