JP2005327809A - Power supply cord wiring structure of electrical device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To hardly have an adverse effect by a jamming wave which outputs from a power supply cord on a signal line when the signal line must be arranged near the power supply cord and to hardly have the effect of heating, in a disposition space of a power supply part on a wiring board when the wiring board with an electric electronic part mounted thereon near the power supply accompanied by the generation of heat has to be arranged in an electric device. <P>SOLUTION: The power supply cord 4 is held drawn from the power supply to the power supply cord drawer mouth 32 of a housing 3. The disposition space of a power supply cord wiring part 42 which is extended toward a holding position in the power supply cord drawer mouth 32 from the power supply is partitioned from a disposition space of the power supply part by a partition plate 6. An interval A between the signal line 52 and the power supply cord wiring part 42 is assured long by retaining the power supply cord wiring part 42 by the cord retainer 7 provided on the partition plate 6. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a power cord routing structure for electrical equipment, particularly when it is necessary to adopt a layout in which signal lines must be arranged in the vicinity of the power cord, or a wiring board on which electrical and electronic components are mounted. The present invention relates to a power supply cord routing structure for electrical equipment, such as when it is unavoidable to be installed in the vicinity of a power supply unit serving as a heat source.

  In electrical equipment using electrical and electronic parts such as microcomputers, the power cord drawn from the power supply circuit is connected to a commercial power supply via a plug, and the power supply circuit is a heat generating part such as a voltage conversion transformer. It is often equipped with. On the other hand, electrical and electronic parts such as a microcomputer are mounted on a wiring board, and an input signal is given to the electrical and electronic equipment via a signal line connected to the wiring board.

  In such electrical equipment, the power cord may act as an antenna. In that case, radio wave interference from the power cord adversely affects the signal line, preventing normal operation of electrical and electronic components. There is a risk that the electrical and electronic parts of the system may malfunction. In addition, the electric and electronic parts on the wiring board may be adversely affected by the heat generated by the power supply unit.

  Conventionally, as a means to suppress or prevent the interference of radio waves emitted from the power cord from adversely affecting the signal line, the generation of interference waves in the power cord using a capacitor can be electrically suppressed, An electronic component is housed in an electromagnetic shielding case to block an interference wave from the power cord (see, for example, Patent Document 1), or the power cord is routed as short as possible in a metal casing Means have been proposed for suppressing radiation of high-frequency radio waves from a cord (for example, see Patent Document 2).

  On the other hand, in one electrical device configured by housing a plurality of different types of device units such as VTRs and DVDs in one housing, the housing is accommodated inside the housing due to a demand for miniaturization and thinning. In addition to being required to increase the mounting density of electrical and electronic components on the printed wiring board, there are many cases where it is not possible to ensure a sufficiently wide space for routing the power cord and signal line. There are also many restrictions on the layout when routing these power cords and signal lines. As a result, as described at the beginning, the layout has to place signal lines near the power cords. It can be forced to pick. In addition, it may happen that the power supply unit and the wiring board must be installed close to each other. FIG. 7 illustrates such a case illustratively.

  That is, the electric device of FIG. 7 is formed by housing the VTR unit 1 and the DVD unit 2 in one flat box-shaped housing 3, and the rising wall 31 as a back plate of the housing 3. A power cord outlet 32 is provided at one position on the upper end, and a predetermined portion of the power cord 4 drawn from a power source (not shown) is held by the power cord outlet 32 via a fixture 41. Further, the DVD unit 2 includes a wiring board 5 on which an LSI 51 is mounted, and various signal lines 52, 53, 54, and 55 are drawn out from a plurality of locations on the wiring board 5 through connectors. These signal lines 52 to 55 include, for example, a DVD audio data line, a DVD start data line, a disk read data line, and the like. When one of the signal lines 52, for example, the DVD audio data line is drawn from the rear end of the wiring board 5, the signal line 52 is connected to the inside of the housing 3 as shown in the figure. In the vicinity of the power cord routing section 42, it is possible that an interference wave coming out of the power cord routing section 42 adversely affects the signal line 52.

  Further, in the case where the wiring board 5 is provided in the vicinity of the power supply unit deployment space (not shown), for example, above the power supply unit, the LSI 51 mounted on the wiring board 5 is affected by the heat generated by the power supply unit. And other electrical and electronic components can be adversely affected.

Under such circumstances, measures should be taken to prevent the disturbing waves from the power cord from adversely affecting the signal line, or the heat generated in the power supply area that is the heat generating area may be affected by other areas. It is extremely useful to take measures to prevent the electric and electronic parts from being damaged by heat so as not to reach the electric and electronic parts on the wiring board installed in the circuit board. By taking the above, it becomes possible to improve the performance reliability of electrical equipment.
Japanese Patent Laid-Open No. 58-80946 JP 59-72938 A

  However, the means described in the above-mentioned Patent Document 1 is to form an unnecessary radiation prevention circuit including an active element such as a transistor and a passive element such as a capacitor on a printed circuit board. It is indispensable to ensure an extra space for forming the prevention circuit in the printed circuit board, and the printed circuit board tends to be enlarged or the printed circuit board is increased in cost. In addition, the means described in Patent Document 2 draws the power cord from the vicinity of the power switch attached to the housing and connects the power cord to the power switch to pull the power cord inside the housing. Since the turning length is as short as possible, this means can be used only when it is allowed to place the power switch installation location and the power cord lead-in location close to each other. If this is not allowed, this measure cannot be applied. Further, Patent Document 1 and Patent Document 2 do not describe the thermal effect that the heat generation of the power supply unit has on the electrical and electronic components on the wiring board from which the signal lines are drawn.

  The present invention has been made under the above circumstances, and even when a signal line must be laid out in the vicinity of the power cord, it is obstructed from the power cord. It is possible to make the adverse effects of waves as difficult and difficult as possible to the signal line, and even when it is necessary to deploy a wiring board with electrical and electronic components mounted near the power source part that generates heat , Power cord routing structure for electrical equipment that can prevent the electrical and electronic components on the wiring board from being affected by heat generation in the installation space of the power supply section so that the electrical and electronic components do not cause thermal destruction The purpose is to provide.

  In the power cord routing structure for an electrical device according to the present invention, the power cord drawn out from the power source is held in the power cord outlet provided in the rising wall of the casing that houses the power source, and the power source The position of the power cord routing portion is regulated by a partition plate that divides the deployment space of the power cord routing portion and the deployment space of the power source portion extending from the portion toward the holding location at the power cord outlet. The power cord routing portion includes a hanging portion starting from the holding location, and cord positioning means is provided for facing the hanging portion to a signal line connected to a wiring board housed in the housing. At the same time, the cord positioning means presses the end of the drooping portion to prevent the drooping portion from approaching the signal line.

  With this configuration, even if it is necessary to adopt a layout in which the signal lines must be arranged in the vicinity of the power cord, the cord positioning means provided in the partition plate can route the power cord. Since the drooping portion is formed in the portion and the drooping portion is prevented from approaching the signal line, the influence of the disturbing wave coming out of the power cord is less likely to reach the signal line.

  In the present invention, it is desirable to suppress the influence of heat generated by the power supply unit from reaching the wiring board by the partition plate. In this case, the cord positioning means provided in the partition plate that makes it difficult for the influence of the heat generated in the power supply part to reach the wiring board forms a hanging part in the power cord routing part, and the hanging part does not approach the signal line. Even if it is necessary to adopt a layout that requires signal lines to be placed near the power cord, electrical and electronic parts are mounted near the power source. Even if it is necessary to deploy a wiring board, the signal line is less likely to be adversely affected by disturbing waves coming out of the power cord without adding extra members. The adverse effect of heat generation on the circuit board does not reach the electrical and electronic parts on the wiring board.

  In the present invention, it is possible to adopt a configuration in which the cord positioning means is formed by a plate-like cord pressing portion that is integrally connected to the partition plate and presses the end of the hanging portion. . According to this, the cord positioning means can be easily integrally formed with synthetic resin at a low cost together with, for example, a partition.

  In the present invention, by extending the cord pressing portion in a direction approaching the rising wall of the casing, the pressing portion at the terminal end of the hanging portion is brought close to the rising wall to keep the hanging portion away from the signal line. It is also possible to adopt the configuration described above, and according to this, since the hanging portion of the power cord is further away from the signal line, the adverse effect due to the disturbing wave coming out of the power cord is less likely to reach the signal line.

  In the power cord routing structure for an electric device according to the present invention, the power cord drawn from the power source is held in the power cord outlet provided at the upper end of the rising wall of the housing that houses the power source. The power cord routing portion is positioned on a partition plate that partitions the deployment space of the power cord routing portion extending from the power source portion toward the holding location at the power cord outlet and the deployment space of the power source portion. A cord positioning means for regulating and including a hanging portion starting from the holding portion in the power cord routing portion and facing the hanging portion with a signal line connected to the wiring board housed in the housing; And the cord positioning means presses the terminal end of the hanging portion to prevent the hanging portion from approaching the signal line. A plate-shaped cord that suppresses the influence of heat generated by the power supply section on the wiring board by the cable, and the cord positioning means is integrally connected to the partition plate to hold down the terminal end of the hanging portion. The cord holding part is formed by a holding part, and the cord holding part extends in a direction approaching the rising wall of the casing, thereby bringing the holding point at the end of the hanging part closer to the rising wall and moving the hanging part away from the signal line. The cord pressing portion is further embodied by adopting a structure in which a gate-shaped structure portion that forms an insertion space for the power cord routing portion cooperates with the partition plate. The And according to this invention, in addition to the effect | action exhibited by said each invention, a gate-shaped groove part helps to position-control the whole power cord routing part.

  As described above, according to the present invention, even if it is necessary to adopt a layout in which electrical equipment is forced to place signal lines in the vicinity of the power cord, interference from the power cord can be prevented. The adverse effect of the wave is as difficult and difficult as possible on the signal line, and the operational reliability of the electrical equipment is improved. Even if it is necessary to deploy a wiring board with electrical and electronic components mounted near the power supply unit that generates heat, the influence of heat generation in the space where the power supply unit is installed is It becomes difficult to reach parts.

  In particular, according to the present invention, the configuration is such that the position of the power cord routing portion is regulated by using a partition plate necessary to suppress the influence of heat generation in the power source portion to the surroundings. By simply taking a simple measure of changing the shape of the partition plate, it is possible to suppress the influence of the disturbing wave coming out from the power cord routing section on the signal line.

  FIG. 1 is a schematic side view showing a power cord routing structure of an electric apparatus according to an embodiment of the present invention, FIG. 2 is a schematic plan view thereof, and FIG. 3 is a schematic perspective view of a main part of a partition plate 6.

  As shown in FIG. 3, the partition plate 6 includes an upper plate portion 61 and a hanging plate portion 62 continuously provided at one end in the width direction of the upper plate portion 61. Is provided with an opening 63 for inserting a power cord. The partition plate 6 is integrally provided with a cord pressing portion 7 as a cord positioning means. The cord holding portion 7 in the illustrated example is integrally formed of synthetic resin together with the partition plate 6, and is perpendicular to the horizontal plate portion 71 extending laterally from the upper plate portion 61 and the end portion of the horizontal plate portion 71. And a vertical plate portion 72 that is suspended. The cord pressing portion 7 cooperates with the partition plate 6 to form a portal structure 8.

  As shown in FIG. 1 or FIG. 2, the partition plate 6 is arranged inside the casing 3 so that the rear end portion thereof is positioned close to the rising wall 31 as the back plate of the casing 3. On the other hand, a power cord outlet 32 is formed in a recessed shape at one location on the upper end of the rising wall 31 of the housing 3, and the power cord outlet 32 is connected to the partition plate 6 from a power source (not shown). A predetermined portion of the power cord 4 drawn through the opening 63 is held via a fixture 41. The partition plate 6 is provided with a power supply cord (not shown) accommodated in the housing 3, and a power cord extending from the power supply portion toward the holding location at the power cord outlet 32. The deployment space of the routing section 42 is partitioned in the left-right direction (width direction). In addition, the power cord routing portion 42 is inserted through a portal groove portion 8 formed by the cooperation of the cord pressing portion 7 and the partition plate 6, so that the routing position is regulated, The rear end portion of the cord pressing portion 7 presses the middle portion of the power cord routing portion 42 downward as shown in FIG. For this reason, the power cord routing section 42 has a droop that starts from the location where the power cord 4 is held by the power cord outlet 32 and ends at the location where the rear end of the cord pressing portion 7 is pressed. A portion 43 is formed. In particular, in the illustrated example, the rear end portion of the partition plate 6 is brought close to the rising wall 31 of the housing 3, and the rear end position of the cord pressing portion 7 is aligned with the rear end position of the partition plate 6 in a straight line. Therefore, the pressing portion 44 at the end of the hanging part 43 is close to the rising wall 31, and the hanging part 43 extends substantially parallel to the rising wall 31.

  A wiring board 5 is arranged on top of the partition plate 6 so that an LSI (not shown) (see FIG. 7) and other electric / electronic components are mounted on the wiring board 5. Further, as described with reference to FIG. 7, a necessary number of signal lines are connected to a plurality of locations on the wiring board 5, and one of the signal lines 52, for example, a DVD audio data line is drawn out. The signal line 52 is opposed to the hanging portion 43 of the power cord routing portion 42 in the front-rear direction for the reason of the configuration of the electric device.

  In the power cord routing structure of the electrical apparatus having the above-described configuration, the cord pressing portion 7 regulates the position of the power cord routing portion 43 and the power cord routing portion 43 includes the hanging portion 43. In addition, since the cord pressing portion 7 presses the end of the hanging portion 43 and keeps the entire hanging portion 43 away from the signal line 52, the interval A between the hanging portion 43 and the signal line 52 is widened. In addition, since the power cord routing portion 43 is inserted through the gate-shaped groove portion 8, the horizontal plate portion 71 of the cord pressing portion 7 is positioned between the power cord routing portion 43 and the signal line 52. . For this reason, the influence of the disturbing wave emitted from the hanging part 43 and the power cord routing part 42 including the hanging part 43 does not easily reach the signal line 52, and the electric and electronic equipment mounted on the wiring board 5 malfunctions. Or the operational reliability of the electrical equipment is prevented from being impaired.

  Further, the partition plate 6 divides the deployment space of the power supply unit and the deployment space of the power cord routing unit 42, and the wiring board 5 is deployed outside the deployment space of the power supply unit that is a heat source. It is difficult for the wiring board 5 to be affected by the heat generated in the part deployment space. Therefore, even if the wiring board 5 is arranged close to the power supply unit, electrical and electronic parts such as LSIs mounted on the wiring board 5 cause thermal destruction and malfunction or operation stability is impaired. Things are less likely to happen.

  As in the embodiment described above, aligning the rear end position of the cord pressing portion 7 with the rear end position of the partition plate 6 in a straight line ensures the distance A between the hanging portion 43 and the signal line 52 as long as possible. In addition to making the influence of the interference wave coming out from the hanging part 43 less likely to reach the signal line 52, the mold structure when the partition plate 6 and the cord pressing part 7 are integrally formed of synthetic resin is simplified. This is useful for keeping production costs low. However, it is not always necessary to align the rear end position of the cord pressing portion 7 with the rear end position of the partition plate 6, and the rear end of the cord pressing portion 7 is positioned in front of the rear end of the partition plate 6. It is also possible. Such an embodiment is shown in FIGS.

  4 is a schematic side view showing a power cord routing structure of an electric device according to another embodiment of the present invention, FIG. 5 is a schematic plan view thereof, and FIG. 6 is a schematic perspective view of a main part of the partition plate 6. It is.

  As shown in FIG. 6, in this embodiment, the rear end portion of the cord pressing portion 7 is positioned in front of the rear end portion of the partition plate 6. When the partition plate 6 integrally provided with such a cord pressing portion 7 is used, as shown in FIG. 4, the pressing place of the power cord routing portion 42 by the rear end portion of the cord pressing portion 7 is lower than that in the case of FIG. 1 is also located on the front side, the hanging portion 43 formed in the power coat routing portion 42 approaches the signal line 52 and the distance A between them becomes shorter than in the case of FIG. Since the end of 43 is pressed to prevent the drooping portion 43 from approaching the signal line 52, a situation in which an interference wave from the drooping portion 43 adversely affects the signal line 52 is also avoided to some extent.

  The embodiment (first example) described with reference to FIGS. 1 to 3 has a cord pressing portion 7 with a rising wall 31 of the housing 3 as compared with the embodiment (second example) described with reference to FIGS. It is extended in the direction approaching. For this reason, the first embodiment is effective in increasing the distance A between the signal line 52 and the hanging portion 43 of the power cord routing section 42, but the power cord 4 is connected to the power supply of the rising wall 31 via the fixture 41. In terms of workability when the cord pull-out port 32 is held, the second embodiment that can ensure a long length of the hanging portion 43 is superior. Therefore, which of the configurations of the first embodiment and the second embodiment is adopted depends on whether the power cord 4 is held in the power cord outlet 32, whether workability is good or not, and the width of the space A is wide. Should be selected as appropriate.

  4 to 6, other matters are the same as those described in FIG. 1 to FIG. 3 or FIG. 7, and thus the same or corresponding parts are denoted by the same reference numerals to avoid duplication of explanation.

It is the schematic side view which showed the power cord routing structure of the electric equipment which concerns on embodiment of this invention. It is the same schematic plan view. It is a schematic perspective view of the principal part of a partition plate. It is the schematic side view which showed the power cord routing structure of the electric equipment which concerns on other embodiment of this invention. It is the same schematic plan view. It is a schematic perspective view of the principal part of a partition plate. It is explanatory drawing which showed the specific power cord routing structure.

Explanation of symbols

3 Housing 4 Power cord 5 Wiring board 6 Partition plate 7 Cord holding part (code positioning means)
8 Gate-shaped part 31 Rising wall 32 Power cord outlet 42 Power cord routing part 43 Hanging part 52 Signal line B Holding place at the power cord outlet

Claims (5)

The power cord drawn out from the power supply unit is held in the power cord outlet provided at the upper end of the rising wall of the casing that houses the power supply unit, and the holding place from the power supply unit to the power cord outlet A partition plate that divides the deployment space of the power cord routing portion extending toward the power supply location and the deployment space of the power supply portion, and restricts the position of the power cord routing portion and places the holding portion in the power cord routing portion A cord positioning means is included which includes a hanging portion as a starting end and which opposes the hanging portion with a signal line connected to a wiring board accommodated in the housing. Holds the end and prevents the drooping part from approaching the signal line,
The partition plate suppresses the influence of the heat generated by the power supply unit on the wiring board, and the cord positioning means is integrally connected to the partition plate so as to hold down the terminal end of the hanging part. Formed by the cord holding part,
By extending the cord pressing part in the direction approaching the rising wall of the casing, the pressing part at the end of the hanging part is brought close to the rising wall to keep the hanging part away from the signal line,
A power cord routing structure for a power supply device, wherein the cord pressing portion forms a gate-shaped structure portion that cooperates with the partition plate to form an insertion space for the power cord routing portion. A power cord drawn out from the power source is held in a power cord outlet provided on a rising wall of a housing that houses the power source, and from the power source toward a holding location at the power cord outlet. In the partition plate that partitions the extended space for the power cord routing portion and the deployment space for the power source portion, the position of the power cord routing portion is regulated, and the holding portion of the power cord routing portion is set as the starting point. The cord positioning means includes a hanging portion and opposes the hanging portion to a signal line connected to the wiring board accommodated in the housing, and the cord positioning means holds the end of the hanging portion. A power cord routing structure for electrical equipment, wherein the hanging portion of the lever prevents the signal line from approaching the signal line. 3. The power cord routing structure for an electric device according to claim 2, wherein the partition plate suppresses the influence of heat generated by the power source section on the wiring board. 4. The power cord routing structure according to claim 2, wherein the cord positioning means is formed by a plate-like cord pressing portion that is integrally connected to the partition plate and presses the terminal end of the hanging portion. . 5. The cord pressing part is extended in a direction approaching the rising wall of the housing to bring the pressing part at the terminal end of the hanging part closer to the rising wall and keeping the hanging part away from the signal line. The power cord routing structure described.

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