JP3085141U - Harness cable - Google Patents

Abstract

(57) [abstract] (with correction) [PROBLEM] To effectively increase transmission efficiency and effectively prevent electromagnetic interference, and to display a warning when a cable rises in temperature due to external heat. When provided with a shape memory effect and provided inside the computer,
An object of the present invention is to provide a harness cable capable of preventing a part of the cable from receiving heat in proximity to a high-temperature element inside the computer. The cable unit includes a cable unit composed of a plurality of transmission lines, a cable formed by stacking and binding a plurality of the cable units in a layer, and a connector. The cable unit has a signal line 362 and a ground line alternately. And the signal line is surrounded by the adjacent ground line 364 in a state of being bound as a cable. Further, the cable is covered with a metal net pipe to give a shape memory effect to the cable so that the shape can be maintained when the cable is appropriately bent. Further, an insulating protective layer for covering the metal net pipe or a protective cover for covering a connecting portion between the cable and the connector is formed so as to include a material whose color changes due to a thermal reaction.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a so-called harness cable in which electric wires and cables are bound as a unit, and in particular, a harness cable in which a cable unit formed by binding a plurality of transmission lines is layered to prevent electromagnetic interference and enhance transmission efficiency. About.

[0002]

[Prior art]

 In recent years, with the advanced development of the information industry and the drastic improvement of the semiconductor manufacturing process, the demand for computer operation speed of people has been increasing more and more. For this reason, with the aim of increasing the working speed and efficiency of the entire computer, the design of the central processing unit (CPU) of the computer has been improved to increase the computing speed, increase the reading / writing speed of the hard disk, and increase the memory capacity. Improvements, such as increases, are constantly being made. However, the overall efficiency of the computer and the components of the computer system are closely related, and the signal transmission efficiency is even more important. Therefore, transmission cable design is an important part that cannot be ignored.

[0003] As for a conventional cable in which transmission lines are bound or assembled, a flat cable structure shown in Figs. 1 and 2 is commonly used by those skilled in the art. The primary structure comprises a flat cable (12) and at least one or more connectors (14) secured to the flat cable (12). The flat cable (12) has a plurality of transmission lines (16) arranged and formed in a flat shape, and the plurality of transmission lines (16) are connected to a signal line (162) for signal transmission. The signal line (162) and the ground line (164) are alternately arranged so as to obtain preferable transmission efficiency and prevent electromagnetic interference while being divided into a ground line (164) for grounding. . Such a structure is easy to manufacture and convenient to use.

However, in the above-described flat cable structure, since the signal line (162) has only two sides adjacent to the ground line (164), interference with the signal line (162) by an external electromagnetic wave easily occurs. At the same time, the electromagnetic waves generated by the signal lines (162) themselves also exceed the ground line (164), so that the signal lines (162) interfere with each other.

[0005] Furthermore, the flat cable (12) has a large surface area because a plurality of transmission lines (16) are arranged in a flat shape, which easily obstructs the flow of air inside the computer main body. As a result, the heat radiation of the computer itself becomes poor, the temperature of the internal elements rises, and the efficiency of the computer system itself decreases.

In order to solve the above problems, those skilled in the art have already provided an improved structure as shown in FIG. The structure comprises a cable (22) composed of a plurality of transmission lines (26) and at least one or more connectors (24) fixed to the cable (22). ) Form a twisted pair configuration in which the signal line (262) and the ground line (164) corresponding to the signal line (262) are twisted. Such twisted pair cables can alleviate the problem of electromagnetic interference to some extent, but not only with limited effectiveness, but also by twisting each individual transmission line. Since the twisted pair structure is used, and the cable units having the twisted pair structure are arranged and fixed, there are many difficulties in both manufacturing and fixing the cable.

[0007] Separately, those skilled in the art provide a cable in which the transmission line is configured in a coaxial mode. That is, a cable unit is formed by surrounding the outer periphery of the signal line with the ground line, and further, a cable unit having a coaxial transmission line is fixed in parallel to form a cable. Although a cable having such a structure can obtain an excellent effect of preventing electromagnetic interference, however, since the manufacturing cost is extremely high and the outer periphery of the signal line is surrounded by a ground line, the cable is mainly provided around the transmission line. The diameter of the resulting cable unit increases and becomes thicker. Therefore, when compared with a cable of another mode having the same number of wires, it occupies a relatively large space in the computer body, hinders the flow of air inside the computer body, and affects the heat radiation effect. Therefore, it is difficult for either the contractor or the user to decide whether to take advantage of its excellent electromagnetic interference prevention effect or to avoid adopting it because of its adverse effect on the heat radiation effect.

When a cable including these transmission lines is provided in a computer main body, both ends of the cable are fixed by a connector or the like, and are provided so as to extend between elements in the computer main body to be connected by the cable. However, what can be said in common with the above-mentioned conventional cables is that they are all formed flexibly and maintain any fixed shape while being bridged between elements in the computer body. Can not. For this reason, if a part of the cable hangs down and its position approaches a relatively high-temperature element in the computer main body, the cable easily receives the heat of the high-temperature element. Therefore, the temperature rises, affecting the transmission efficiency of the cable.

[0009] Thus, how to propose a new solution to the above-mentioned disadvantages of the known cable structure and the problems arising in use, namely to design a practical and simple to manufacture cable structure. To prevent noise and electromagnetic interference effectively and not to disturb the heat radiation inside the computer has long been the user's longing for the solution and the difficulty that the present inventors have tried to solve. Was.

[0010]

[Problems to be solved by the invention]

 In view of the above-mentioned drawbacks in the conventional technology, the present invention has been repeatedly developed, designed, researched, prototyped, and improved based on practical experience of the inventor in research and development, sales, etc., who have been engaged in the business for many years. It is a thing. That is, an object of the present invention is to provide a harness cable capable of effectively increasing transmission efficiency and effectively preventing electromagnetic interference.

Another object of the present invention is to provide a harness cable having a warning effect by displaying an increase in temperature when the temperature of the cable increases due to external heat.

Further, the present invention provides a harness cable which has a shape memory effect and, when provided inside a computer, can prevent a part of the cable from receiving heat in close proximity to a high-temperature element inside the computer. The task is to provide.

[0013]

[Means for Solving the Problems]

 The harness cable according to claim 1 includes a cable unit that is a transmission line bundle composed of a plurality of transmission lines, a cable formed by binding a plurality of the cable units, and at least one connector fixed to the cable. And a structure in which the plurality of cable units are formed in a flat shape and stacked in layers to form a cable, thereby effectively improving transmission efficiency and preventing electromagnetic interference.

According to a second aspect of the present invention, in the harness cable, the transmission line according to the first aspect includes a signal line for signal transmission and a ground line, and the signal line is surrounded by an adjacent ground line. It has a structure that effectively enhances transmission efficiency and prevents electromagnetic interference.

According to a third aspect of the present invention, the cable unit according to the first aspect has a structure in which each of the cable units is composed of the same number of transmission lines, effectively increasing transmission efficiency, and preventing electromagnetic interference. .

According to a fourth aspect of the present invention, there is provided a harness cable including at least one or more shield layers for covering the outside of the cable according to the first aspect, and a structure for enhancing a shielding effect and effectively preventing electromagnetic interference.

According to a fifth aspect of the present invention, in the harness cable, the shield layer according to the fourth aspect is a metal net pipe, which enhances a shielding effect, effectively prevents electromagnetic interference, and has a shape memory function for the cable. It has a structure to be held.

The harness cable according to claim 6 has a structure in which a separate ground wire is separately connected to the metal net pipe according to claim 5 to further enhance the shielding effect.

The harness cable according to claim 7 has a structure in which the shield layer according to claim 4 is further covered with at least one or more insulating protective layers and has an insulating effect for preventing a short circuit.

[0020] In the harness cable according to the eighth aspect, the insulating protective layer according to the seventh aspect includes a material whose color changes by a thermal reaction, and changes color when the temperature rises, and has a warning action.

A harness cable according to a ninth aspect has a structure in which a connection portion between the connector and the cable according to the first aspect is covered with at least one or more shield covers, and a shielding effect on the portion is obtained. .

According to a tenth aspect of the present invention, in the harness cable according to the ninth aspect, the shield cover according to the ninth aspect is formed by a metal foil piece or a laminated piece including a metal foil, and by isolating the portion from external noise and electromagnetic interference. And a structure that can provide a shielding effect.

[0023] The harness cable according to claim 11 has a structure in which the shield cover according to claim 9 is covered with at least one or more protective covers, and has an effect of preventing a short circuit generated by the shield cover. .

In the harness cable according to the eleventh aspect, the protective cover according to the eleventh aspect includes a material whose color changes due to a thermal reaction, and has a warning action because the color changes when the temperature rises.

In the harness cable according to the twelfth aspect, at least one fixing piece is provided in a portion adjacent to the connector according to the first aspect, so that excessive deformation is prevented from occurring in the portion and electromagnetic interference is prevented. A structure having a reducing effect is provided.

The harness cable according to claim 13 has a structure in which the fixing piece according to claim 12 is made of a soft resin containing ferrite and has an effect of reducing electromagnetic interference.

[0027]

[Embodiment of the invention]

 The harness cable according to the present invention includes a cable unit formed by binding a plurality of transmission lines including a signal line and a ground line, a cable formed by binding a plurality of the cable units, and at least one cable fixed to the cable. The cable unit comprises a plurality of transmission lines formed in a flat shape and stacked in layers to form a cable, and the cable comprises a ground line to which the signal line is adjacent. It is surrounded by In order to explain the structure and features of such a harness cable, a specific example will be described below in detail.

[0028]

First Embodiment FIG. 4 is an explanatory view of the structure of a harness cable according to the present invention, and FIG. 4 is a sectional view of the cable. As shown, the primary structure includes a cable (32) composed of a plurality of transmission lines (36) and at least one connector (34) secured to the cable (32). . The cable (32) includes, for example, a first cable unit (322), a second cable unit (324), a third cable unit (326), a fourth cable unit (328), and the like as disclosed in FIG. Cable unit. Each of the cable units (322, 324, 326, 328) is formed in a flat shape by the same number of even-numbered transmission lines (36), and furthermore, the first cable unit (322) and the third cable unit (326) is provided in one direction, and the second cable unit (324) and the fourth cable unit (328) are successively applied in opposite directions, so that the cable units overlap each other in a stacked structure.

The transmission line (36) is divided into a signal line (362) for signal transmission and a ground line (364) for grounding, and each cable unit (322, 324) constituting the cable (32) , 326 and 328) are arranged alternately with the signal line (362) and the ground line (364). When these are overlapped, as shown in FIG. Are surrounded by the ground wire (364) except for the surface that becomes the outer peripheral surface of the cable (32). Accordingly, electromagnetic interference between the signal lines (362) is effectively prevented, and transmission errors are prevented, thereby relatively increasing transmission efficiency.

Further, in the structure in which a plurality of transmission lines (36) are superimposed, since the respective transmission lines (36) are densely deposited, a cable of another aspect having other transmission lines having the same number of lines is provided. In comparison with the above, the volume of the entire cable can be reduced, and when used in a computer main body, the space occupied in the computer main body is reduced. For this reason, it is unlikely that the air flow in the computer body is obstructed and the heat radiation effect is affected, which contributes to an increase in the overall operation efficiency of the computer body.

[0031]

Second Embodiment FIGS. 6 and 7 disclose a second embodiment of the present invention. FIG. 6 is an explanatory view showing the structure of the second embodiment, and FIG. 7 is a sectional view of the cable disclosed in FIG. In the second embodiment, as shown, other members are added to the first embodiment shown in FIG. 4, thereby improving the transmission efficiency and other effects of the cable.

As disclosed in FIG. 6, the piled-up structure of the cable (32), in which the cable units (322, 324, 326, 328) are superimposed, is covered with a metal net pipe (62) to form external noise. And isolate from electromagnetic interference. In addition, the metal net pipe (62) allows the cable (32) to have a shape memory function due to the ductility and flexibility of the metal. Therefore, when the cable according to the second embodiment is provided in the computer main body, the cable (32) is appropriately bent after the cable installation is completed, and a shape necessary to avoid a high-temperature element of the computer main body. The effect of holding can be obtained.

An insulating protective layer (44) is further provided outside the metal net pipe (42) to prevent the metal net pipe (42) from contacting an external circuit to form a short circuit. The insulating protective layer (44) is formed to include a material that changes color by a thermal reaction. For this reason, the insulating protective layer (44) changes its color when the temperature rises due to a change in the working temperature inside the computer and its status, and has a kind of warning display effect.

Further, at least one or more fixing pieces (48) are provided at a connection portion between the connector (34) and the cable (32) to prevent excessive deformation at the connection portion. I do. The fixing piece (48) is a resin piece containing ferrite and is directly adhered to the connecting portion, and has an effect of preventing deformation and reducing electromagnetic interference.

Finally, the cable (32) is bent between the stacking structure where the cable units (322, 324, 326, 328) of the cable (32) are overlapped, and the connecting portion of the connector (34). Then, the portion arranged in a flat shape is covered with a shield cover (45). The shield cover (45) is made of a metal foil or a laminated piece provided with a metal foil, and has an action of isolating the coating from external noise and electromagnetic interference. Further, a protective cover (46) is provided outside the shield cover (45). The protective cover (46) covers the shield cover (46) to prevent the occurrence of a short circuit, and when the cable according to the second embodiment is installed in the main body of the computer, the action of the smooth surface causes the computer to operate. It has the function of smoothly circulating the air on the cable without obstructing the air inside the body.

The protective cover (46) also contains a material that changes color due to a thermal reaction, and has a warning effect when the color changes with a change in temperature.

As disclosed in FIG. 8, one end of a separate ground wire (425) is connected to the metal net pipe (42), and the other end of the ground wire is connected to the connector (34). It may be a stretched free end. By providing the single ground line (425), the shield effect can be further enhanced.

The above description discloses a preferred embodiment of the present invention, and does not limit the scope of implementation of the present invention. Therefore, any modification or change that can be made by those skilled in the art, which has an equivalent effect on the present invention and is within the spirit of the present invention, is a registration of a utility model registration of the present invention. It belongs to the range.

The harness cable according to the present invention has a structure in which a cable unit composed of a plurality of transmission lines is bound, a structure in which the transmission lines are densely deposited, and a transmission line for signal transmission deposited inside the harness cable. Since each (signal line) is surrounded by a grounding transmission line (grounding line), it has an excellent shielding effect, thereby preventing electromagnetic interference and improving transmission efficiency. In addition, by covering the cable with a metal net pipe, not only the shielding effect can be further enhanced, but also the shape memory effect can be given to the cable. Therefore, when the cable is actually installed in the computer body, the cable is not used. Can be appropriately bent to maintain the bent shape, thereby preventing a part of the cable from receiving heat in the vicinity of a high-temperature element inside the computer. Furthermore, since the insulating protective layer covering the metal net pipe or the protective cover covering the connection between the cable and the connector is formed of a material that changes its color due to a thermal reaction, the cable is externally formed. If the temperature rises due to the heat of the device, a warning effect is provided by displaying the rise in temperature.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing a structure of a known flat cable.

FIG. 2 is a sectional view of the flat cable disclosed in FIG. 1;

FIG. 3 is an explanatory view showing the structure of a well-known twisted pair cable.

FIG. 4 is an explanatory view showing the structure of the first embodiment of the present invention.

FIG. 5 is a sectional view of the cable disclosed in FIG. 4;

FIG. 6 is an explanatory view showing the structure of a second embodiment of the present invention.

FIG. 7 is a sectional view of the cable disclosed in FIG. 6;

FIG. 8 is a top view showing an embodiment in which an independent ground wire is provided in the cable disclosed in FIG. 6;

[Explanation of symbols]

 12 cable 14 connector 16 transmission line 162 signal line 164 ground line 22 cable 24 connector 26 transmission line 262 signal line 264 ground line 32 cable 322 first cable unit 324 second cable unit 326 third cable unit 328 fourth cable unit 34 connector 36 Transmission line 362 Signal line 364 Grounding line 42 Metal net pipe 425 Grounding line 44 Insulation protection layer 45 Shield cover 46 Protection cover 48 Fixing piece

Claims (14)

[Utility model registration claims] 1. A cable unit comprising a transmission line bundle composed of a plurality of transmission lines, a cable formed by binding a plurality of the cable units, and at least one or more connectors fixed to the cable. A harness cable, wherein the plurality of cable units are formed in a flat shape and stacked in layers to form a cable. 2. The transmission line according to claim 1, wherein the transmission line includes a signal line for signal transmission and a ground line, and the signal line is bound and bound by an adjacent ground line to form the cable. The harness cable according to claim 1, wherein 3. The harness cable according to claim 1, wherein each of the plurality of cable units is composed of the same number of transmission lines. 4. The harness cable according to claim 1, wherein the cable further comprises at least one or more shield layers covering an outer surface. 5. The harness cable according to claim 4, wherein the shield layer is a metal net pipe. 6. The harness cable according to claim 5, wherein the metal net pipe has a separate ground wire to further enhance a shielding effect. 7. The harness cable according to claim 4, wherein the shield layer is further covered with at least one or more insulating protective layers. 8. The harness cable according to claim 7, wherein the insulating protection layer includes a material whose color changes by a thermal reaction. 9. The harness cable according to claim 1, wherein a connection portion between the connector and the cable is covered with at least one or more shield covers. 10. The shield cover is a metal foil piece,
The harness cable according to claim 9, wherein the harness cable is made of a laminated piece including a metal foil. 11. The harness cable according to claim 9, wherein the shield cover is covered with at least one or more protective covers. 12. The protection cover according to claim 1, wherein the protection cover includes a material whose color changes by a thermal reaction.
The harness cable according to 1. 13. The harness cable according to claim 1, wherein the cable has at least one fixing piece provided in a portion adjacent to the connector. 14. The harness cable according to claim 12, wherein the fixing piece is made of a soft resin containing ferrite.