Cable fixing device and computer case

Abstract

The utility model discloses a cable fixing device and a computer case, and relates to the technical field of communication, the cable fixing device comprises a base and a plurality of winding structures; wherein the plurality of winding structures are arranged on the base, the plurality of winding structures are used for winding cables, so that the cables wound on the different winding structures have parts extending in a first direction and parts extending in a second direction, and the parts, extending in the second direction, of the cables are in a near-field area of the parts, extending in the first direction, of the cables, and the parts, extending in the second direction, of the cables are in a near-field area of the parts, extending in the first direction, of the cables. The second direction is opposite to the first direction.

Description

Technical Field

[0001] The present application relates to but is not limited to the technical field of fixing devices, and in particular to a cable fixing device and a computer case. Background Art

[0002] Computers use a lot of cables to connect electronic and electrical devices. The current in the cables will generate a magnetic field, thereby generating electromagnetic radiation. When the cables are placed inside the chassis and the length exceeds a certain limit, the electromagnetic radiation will radiate through the holes in the chassis or external cables, causing electromagnetic interference (EMI) to exceed the standard and even affect the normal operation of other electronic and electrical equipment. Utility Model Content

[0003] In order to solve the above problems, the present application provides a cable fixing device and a computer case.

[0004] In a first aspect, the present application provides a cable fixing device, which includes a base and a plurality of winding structures; wherein the plurality of winding structures are arranged on the base, and the plurality of winding structures are used to wind the cable, so that the cable after being wound on different winding structures has a portion extending in a first direction and a portion extending in a second direction, and the portion of the cable extending in the second direction is within a near field area of ​​the portion of the cable extending in the first direction, and the second direction is opposite to the first direction.

[0005] In a possible implementation of the present application, the maximum distance between adjacent portions of the cables extending in the first direction and the portions extending in the second direction is between 10% and 20% of the distance between two winding structures that wind the cables in different directions.

[0006] In a possible implementation of the present application, a plurality of winding structures are used to wind the cable in different directions, and a portion of the cable extending in a first direction and a portion of the cable extending in a second direction intersect.

[0007] In a possible implementation of the present application, the plurality of winding structures are at least two winding members, and the winding members extend away from the base so that the cable is wound around two adjacent winding members in a first direction and a second direction respectively.

[0008] In one possible implementation of the present application, the multiple winding structures are at least two winding grooves, and the two winding grooves are arranged on both sides of the base. A threading groove is arranged between the two sides of the base, so that after the cable is wound on the winding groove, the part of the cable extending in the first direction and the part extending in the second direction extend along the first surface of the base to the threading groove, and pass through the threading groove to extend along the second surface of the base. The first surface and the second surface of the base are opposite.

[0009] In a possible implementation of the present application, the multiple winding structures are multiple winding assemblies, the winding assemblies include two winding pieces, and the multiple winding assemblies are evenly arranged on the base.

[0010] In one possible implementation of the present application, the cable fixing device also includes at least two isolation members, which are arranged at intervals on the side of the base where the winding member is provided, the isolation members extend away from the base, and the isolation members are arranged at the midpoint between two adjacent winding members and at a position between one of the winding members, and the isolation members are used to limit the position of the cables on both sides.

[0011] In one possible implementation of the present application, the cable fixing device also includes a limiting structure, which is arranged on the side of the base where the winding piece is provided, and is staggered with the winding piece and the isolation piece. The limiting structure extends away from the base, and the limiting structure is used to limit the distance of the cable away from the base.

[0012] In a possible implementation of the present application, the base is an insulating member, and / or the plurality of winding structures are insulating members.

[0013] In a second aspect, the present application also provides a computer case, which includes: a case body, a cable fixing device and a cable; the cable fixing device is arranged in the case body; the cable fixing device includes a base and a plurality of winding structures, and the plurality of winding structures are arranged on the base; the cable is wound around the plurality of winding structures, and the cable after being wound around different winding structures includes a portion extending in a first direction and a portion extending in a second direction, and the portion of the cable extending in the second direction is within a near field area of ​​the portion of the cable extending in the first direction, and the second direction is opposite to the first direction. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 One of the structural schematic diagrams of the cable fixing device provided in the embodiment of the present application;

[0015] Figure 2 The second structural schematic diagram of the cable fixing device provided in the embodiment of the present application;

[0016] Figure 3 One of the schematic diagrams of the current direction of the cable wound on the cable fixing device provided in the embodiment of the present application;

[0017] Figure 4 The third structural schematic diagram of the cable fixing device provided in the embodiment of the present application;

[0018] Figure 5 A second schematic diagram of the direction of current of a cable wound on a cable fixing device provided in an embodiment of the present application;

[0019] Figure 6A fourth structural schematic diagram of a cable fixing device provided in an embodiment of the present application;

[0020] Figure 7 A third schematic diagram of the current direction of a cable wound on a cable fixing device provided in an embodiment of the present application;

[0021] Figure 8 A fifth structural diagram of a cable fixing device provided in an embodiment of the present application;

[0022] Fig. 9 A fourth schematic diagram of the direction of current of a cable wound on a cable fixing device provided in an embodiment of the present application;

[0023] Fig.10 A sixth structural diagram of a cable fixing device provided in an embodiment of the present application;

[0024] Fig.11 A fifth schematic diagram of the direction of current of a cable wound on a cable fixing device provided in an embodiment of the present application;

[0025] Fig.12 The seventh structural diagram of the cable fixing device provided in the embodiment of the present application;

[0026] Fig.13 This is the eighth structural schematic diagram of the cable fixing device provided in the embodiment of the present application.

[0027] Description of reference numerals:

[0028] 1-cable fixing device; 11-base; 111-first surface; 112-second surface; 12-winding structure; 121-winding assembly; 1211-winding member; 122-winding groove; 13-threading groove; 14-isolating member; 15-limiting structure; 151-first limiting assembly; 1511-first limiting member; 15111-first limiting end; 152-second limiting assembly; 1521-second limiting member; 15211-second limiting end; 2-cable; A-first direction; B-second direction. DETAILED DESCRIPTION

[0029] It should be noted that, in the absence of conflict, the embodiments and technical features in the embodiments of the present application can be combined with each other, and the detailed description in the specific implementation method should be understood as an explanation of the purpose of the present application and should not be regarded as an improper limitation on the present application.

[0030] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the specific technical solution of the present application will be further described in detail below in conjunction with the drawings in the embodiments of the present application. The following embodiments are used to illustrate the present application, but are not used to limit the scope of the present application.

[0031] In the embodiments of the present application, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present application, unless otherwise specified, "multiple" means two or more.

[0032] In addition, in the embodiments of the present application, directional terms such as "up", "down", "left" and "right" are defined relative to the orientation of the components in the drawings. It should be understood that these directional terms are relative concepts. They are used for relative description and clarification, and they may change accordingly according to the changes in the orientation of the components in the drawings.

[0033] In the embodiments of the present application, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium.

[0034] In the present application, the terms "comprises", "comprising" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprising a ..." does not exclude the presence of other identical elements in the process, method, article or device including the element.

[0035] In the embodiments of the present application, words such as "exemplary" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a specific way.

[0036] The current in the cable will generate a magnetic field, thereby generating electromagnetic radiation. When the cable is placed inside the chassis and the cable inside the chassis exceeds a certain length, the electromagnetic radiation will radiate through the holes in the chassis or to the external cables, causing electromagnetic interference (EMI) to exceed the standard and even affect the normal operation of other electronic and electrical equipment. Among them, electromagnetic interference is electronic noise that interferes with cable signals and reduces signal integrity. The cable can be a variety of cables. For example, the cable can be a high-frequency signal cable.

[0037] In order to suppress EMI exceeding the standard, the related technology uses the method of increasing the shielding material of the cable to enhance the shielding effectiveness of the cable, such as replacing the connector with better shielding performance, or using better cable shielding material or increasing the number of shielding layers. The related technology also has the method of reducing the holes in the chassis to reduce the radiation leakage of internal interference of the chassis to the outside, such as adding conductive gaskets to fill the non-contact points in the gaps, eliminating the gaps, or setting contact points on the chassis.

[0038] However, if the connector with better shielding performance is replaced, or better cable shielding materials are used or the number of shielding layers is increased, a lot of costs will be added, and if ordinary cables or connectors are already available, replacement will be inconvenient. If conductive gaskets are added to fill the non-contact points in the gaps of the chassis, the conductive gaskets need to be installed in the gaps of the chassis, which increases the difficulty of assembly; in addition, if contact spring points are set on the chassis, the processing difficulty of the chassis components is increased.

[0039] On this basis, refer to Figure 1 , Figure 2 and Figure 3 An embodiment of the present application provides a cable fixing device 1, which includes a base 11 and a plurality of winding structures 12; wherein the plurality of winding structures 12 are arranged on the base 11, and the plurality of winding structures 12 are used to wind a cable 2, so that the cable 2 wound on different winding structures 12 has a portion extending in a first direction A and a portion extending in a second direction B, and the portion of the cable 2 extending in the second direction B is in a near field area of ​​the portion of the cable 2 extending in the first direction A, and the second direction B is opposite to the first direction A.

[0040] In this way, the magnetic flux generated by the transmission current inside the cable 2 is opposite to the part extending in the second direction B of the cable 2 and the part extending in the first direction A of the cable 2. The multiple winding structures 12 can constrain the mutual distance of the wound cables 2, and the magnitude of the magnetic fluxes in opposite directions can be basically equal, so that the electromagnetic flux generated by the part extending in the first direction A of the cable 2 and the electromagnetic flux generated by the part extending in the second direction B can offset each other in opposite directions, thereby successfully reducing external radiation emission, reducing electromagnetic interference, and suppressing the EMI of the cable 2 from exceeding the standard. When the cable is routed inside the device, the cable can be fixed by a cable fixing device, which can greatly reduce the radiation emission intensity of the device. Compared with the related art that uses the use of increasing the shielding material of the cable 2 to enhance the shielding effectiveness of the cable 2 or reducing the aperture of the chassis to reduce electromagnetic interference, but there are technical problems of high cost, difficulty in processing and high difficulty in assembly, the cable fixing device 1 has low cost, is easy to process, and is easy to assemble.

[0041] It should be noted that, in general, the alternating electromagnetic field generated by the electromagnetic radiation source can be divided into two parts with different properties, one of which is that a part of the electromagnetic field energy flows back and forth periodically in the space around the radiation source and between the radiation sources, and is not emitted outward, which is called the induction field, that is, the near field area; the other part of the electromagnetic field energy is separated from the radiator and emitted outward in the form of electromagnetic waves, which is called the radiation field, that is, the far field area. Since the division of the far field area and the near field area is relatively complex, it should be divided according to different working environments and measurement purposes. The electromagnetic field intensity in the near field area of ​​cable 2 is much greater than that in the far field area, so special attention should be paid to the protection of the near field area of ​​electromagnetic radiation. Various electronic and electrical equipment located in the near field area of ​​cable 2 can be protected.

[0042] In addition, multiple winding structures 12 can constrain the mutual distance between the wound cables 2, and multiple winding structures 12 can fix the portion of the cable 2 extending in the second direction B and the portion of the cable 2 extending in the first direction A to each other in the near field area, so that the portion of the cable 2 extending in the second direction B can offset the magnetic flux generated by the portion of the cable 2 extending in the first direction A.

[0043] Reference Figure 1 , Figure 2 and Figure 3 In some embodiments provided in the present application, the maximum distance between the portions of adjacent cables 2 extending in the first direction A and the portions extending in the second direction B can be between 10% and 20% of the distance between the two winding structures 12 that allow the cables 2 to be wound in different directions.

[0044] In this way, the multiple winding structures 12 can constrain the mutual distances of the wound cables 2 to be limited, so that the portion of the cable 2 extending in the second direction B is within the near field area of ​​the portion of the cable 2 extending in the first direction A, and the magnetic fluxes in opposite directions can be basically equal in magnitude. Overall, the magnetic fluxes in opposite directions can cancel each other out, thereby successfully reducing external radiation emissions to a large extent.

[0045] It should be noted that there is no definite proportional relationship between the magnitude of the electric field strength and the magnetic field strength in the near field area. The electromagnetic field strength in the near field area changes relatively quickly with distance, and the non-uniformity in this space is relatively large. Different currents lead to different near-field and far-field ranges. The near-field distribution of the electromagnetic field is relatively complex and difficult to quantitatively calculate. The distance interval between the portion extending in the second direction B of the cable 2 and the portion extending in the first direction A of the cable 2 can be determined by actual measurement. Through experiments, when the distance between the portion extending in the second direction B of the cable 2 and the portion extending in the first direction A of the cable 2 is 10% to 20% of the distance between the winding structures 12, the far-field radiation emission can reach a difference of more than 5dB. Therefore, in this embodiment, the maximum distance between the portion extending in the second direction B of the cable 2 and the portion extending in the first direction A of the cable 2 can be 10% to 20% of the distance between the winding structures 12. The closer the portion extending in the second direction B of the cable 2 and the portion extending in the first direction A of the cable 2 are, the more the magnetic flux cancels each other, and the less the external radiation emission.

[0046] In addition, the cable 2 can be wound in different ways on the multiple winding structures 12. For example, the cable 2 can be wound in the multiple winding structures 12 to form an S-shaped stacked routing. Figure 3 , Figure 5 and Figure 7 In some embodiments provided in the present application, a plurality of winding structures 12 are used to wind the cable 2 in different directions, and a portion of the cable 2 extending in the first direction A and a portion of the cable 2 extending in the second direction B are crossed.

[0047] In this way, the cable 2 can be wound around the plurality of winding structures 12 in the form of an 8-shaped winding, so that the cable 2 generates two groups of left and right portions extending in the first direction A and portions extending in the second direction B of the cable 2 corresponding to each other. The magnetic flux of each group of portions extending in the first direction A of the cable 2 and portions extending in the second direction B of the cable 2 corresponding to each other are divided into multiple groups to cancel each other out, further enhancing the canceling effect of the magnetic flux.

[0048] It should be noted that if the length of the cable 2 allows, the same cable 2 can be wound multiple times in multiple winding structures 12 in the form of 8-shaped winding until there is no extra length of the cable 2. In addition, the winding structure 12 can be a variety of structures.

[0049] Reference Figure 1 , Figure 3 , Figure 4 and Figure 5 In some embodiments provided in the present application, the plurality of winding structures 12 may be at least two winding members 1211, and the winding members 1211 may extend away from the base 11 so that the cable 2 is wound around two adjacent winding members 1211 in a first direction A and a second direction B, respectively.

[0050] In this way, the cable 2 can be wound on the two winding members 1211, so that the cable 2 after being wound on the two adjacent winding members 1211 has a portion extending in the first direction A and a portion extending in the second direction B. The magnetic flux generated by the transmission current inside the cable 2 is in opposite directions in the portion extending in the second direction B of the cable 2 and the portion extending in the first direction A of the cable 2. Because at least two winding members 1211 constrain the mutual distance between the wound cables 2, the magnitudes of the magnetic fluxes in opposite directions are basically equal, so that the electromagnetic flux generated by the portion of the cable 2 extending in the first direction A and the electromagnetic flux generated by the portion extending in the second direction B can partially cancel each other, leaving only the electromagnetic flux generated by the cable 2 with a length between at least two winding members 1211, thereby successfully reducing external radiation emissions to a large extent, reducing electromagnetic interference, and suppressing EMI exceeding the standard of the cable 2.

[0051] It should be noted that the winding member 1211 may be in various shapes. For example, Figure 1 , the winding member 1211 may be cylindrical, referring to Figure 2 , the winding member 1211 may be in sheet shape.

[0052] In addition, the plurality of winding structures 12 may be a plurality of winding members 1211, for example, referring to Figure 4 and Figure 5 , multiple winding members 1211, so that the cable 2 is wound on two adjacent winding members 1211 in a first direction A and a second direction B respectively, and the cable 2 is wound on the multiple winding members 1211 in a twisted shape.

[0053] In addition, the winding structure 12 may be disposed on side surfaces of the base 11 in different directions.

[0054] Reference Figure 8 and Fig. 9 In some embodiments provided in the present application, the plurality of winding structures 12 may be at least two winding grooves 122, the two winding grooves 122 may be arranged on both sides of the base 11, and a threading groove 13 may be arranged between the two sides of the base 11, so that after the cable 2 is wound on the winding groove 122, the portion of the cable 2 extending in the first direction A and the portion extending in the second direction B may extend along the first surface 111 of the base 11 to the threading groove 13, and may become to extend along the second surface 112 of the base 11 through the threading groove 13, and the first surface 111 and the second surface 112 of the base 11 are opposite.

[0055] In this way, the cable 2 can be wound on the two winding grooves 122, so that the magnetic flux generated by the transmission current inside the cable 2 wound on the two winding grooves 122 is in opposite directions in the part extending in the second direction B of the cable 2 and the part extending in the first direction A of the cable 2. Because the thickness of the base 11 constrains the mutual distance between the wound cables 2, the magnetic fluxes of the part extending along the second surface 112 of the base 11 can be substantially equal in magnitude in opposite directions in the near field area of ​​the part extending along the first surface 111 of the base 11. The electromagnetic flux generated by the part extending along the second surface 112 of the base 11 and the electromagnetic flux generated by the part extending along the first surface 111 of the base 11 can offset each other, leaving only the electromagnetic flux generated by the cable 2 with a length of at least the distance between the two winding grooves 122, thereby successfully reducing external radiation emissions to a large extent, reducing electromagnetic interference, and suppressing EMI exceeding the standard of the cable 2.

[0056] It should be noted that the two winding grooves 122 can be symmetrically arranged along the two side ends of the base 11, and the threading groove 13 can be arranged in the middle position of the two symmetrical winding grooves 122, so that the portion of the cable 2 extending in the first direction A and the portion extending in the second direction B can cross in the threading groove 13. The portion of the cable 2 extending in the first direction A and the portion extending in the second direction B can extend along the first surface 111 of the base 11 to the threading groove 13, and then pass through the threading groove 13 to extend along the second surface 112 of the base 11. The first surface 111 and the second surface 112 of the base 11 are opposite, so that the current direction of the cable 2 extending along the first surface 111 on one side of the threading groove 13 of the base 11 is opposite to that of the cable 2 extending along the first surface 111 on the other side of the threading groove 13, and the current direction of the cable 2 extending along the second surface 112 on one side of the threading groove 13 of the base 11 is also opposite to that of the cable 2 extending along the second surface 112 on the other side of the threading groove 13.

[0057] In addition, if the cable 2 is too long, two winding grooves 122 may be provided to be deeper, or multiple groups of winding grooves 122 may be provided, referring to Figure 8 and Fig. 9 In some embodiments provided in the present application, multiple groups of two symmetrical winding grooves 122 can be evenly arranged on the base 11. In this way, the cable 2 can be wound in a group of two winding grooves 122 in the form of an 8-shaped winding, and then can be wound in the next group of two symmetrical winding grooves 122 in the form of an 8-shaped winding.

[0058] In addition, according to the EMC standard GB-9254-2008 Limits and Measurement Methods of Radio Disturbance for Information Technology Equipment, there will be requirements for site layout and harness placement in the test standards, so that electromagnetic interference will be within the standards. The standard states that "the cables between units should hang down from the back edge of the test table. If the distance between the hanging cable and the horizontal grounding plate is less than 0.4 meters, the extra-long part of the cable should be folded back and forth at its center and bundled in an 8-shape into a harness not exceeding 0.4 meters, so that it is at least 0.4 meters above the horizontal reference grounding plate." Therefore, if cable 2 is set in a chassis and the distance between the chassis and the horizontal grounding plate is less than 0.4 meters, cable 2 can be wound back and forth in an 8-shape into a harness not exceeding 0.4 meters. For example, the distance between multiple winding members 1211 should not exceed 0.4 meters. However, if the cable 2 is too long, multiple groups of two symmetrical winding pieces 1211 can be set. In this way, the cable 2 can be wound in a group of two winding pieces 1211 in the form of an 8-shaped winding, and then can be wound in a figure-8 manner on the next group of two symmetrical winding pieces 1211, thereby ensuring that the extra-long portion of the cable is wound back and forth in a figure-8 manner on the two winding pieces 1211 to form a wire bundle not exceeding 0.4 meters.

[0059] Reference Figure 6 and Figure 7 In some embodiments provided in the present application, the plurality of winding structures 12 are a plurality of winding components 121 , the winding components 121 include two winding members 1211 , and the plurality of winding components 121 are evenly arranged on the base 11 .

[0060] In this way, when the cable 2 is too long, the cable 2 can be wound in a group of two winding pieces 1211 in the form of an 8-shaped winding, and then can be wound in the form of an 8-shaped winding on the next group of two symmetrical winding pieces 1211. This ensures that the extra-long portion of the cable is wound back and forth in the form of an 8-shaped winding on the two winding pieces 1211 to form a wire bundle not exceeding 0.4 meters, so that most of the electromagnetic interference will be offset and the remaining electromagnetic interference will be within the standard.

[0061] In addition, the portion of the cable 2 extending in the first direction A and the portion extending in the second direction B cannot be bent, and the magnetic field distribution of the bent cable 2 will change, generating magnetic flux that cannot be offset.

[0062] Reference Fig.10 , Fig.11 and Fig.12 In some embodiments provided in the present application, the cable fixing device 1 may further include at least two isolating members 14, which are arranged at intervals on the side of the base 11 where the winding member 1211 is provided, and the isolating member 14 extends away from the base 11, and the isolating member 14 is arranged at the midpoint between two adjacent winding members 1211 and at a position between one of the winding members 1211, and the isolating member 14 is used to limit the position of the cables 2 on both sides.

[0063] In this way, the portion of the cable 2 extending in the first direction A and the portion extending in the second direction B will not bend, the magnetic field distribution of the cable 2 will not change, and no irreversible magnetic flux will be generated.

[0064] In addition, the portion of the cable 2 extending in the first direction A and the portion of the cable 2 extending in the second direction B may be nearly parallel to each other, which may better offset the magnetic flux.

[0065] Reference Fig.10 , Fig.11 and Fig.12 In some embodiments provided in the present application, the two side edges of the isolation member 14 extend toward the winding members 1211 on both sides to place the cables 2 on both sides in parallel against the upper and lower side surfaces of the isolation member 14, and the other two side edges of the isolation member 14 extend toward the upper and lower edges of the base 11 to keep the cables 2 on both sides away from each other.

[0066] In this way, the cable 2 can be made nearly parallel to each other relative to a group of portions extending in the first direction A and the middle portions of the portion extending in the second direction B, which can better offset the magnetic flux and further prevent the portion of the cable 2 extending in the first direction A and the portion extending in the second direction B from bending.

[0067] In addition, when the cable 2 is wound around the winding member 1211 multiple times, the cable 2 may be wound around the winding member 1211 loosely or tightly, which may cause the parts of the cable 2 wound multiple times around the same winding member 1211 to be at different positions on the base 11, resulting in a poor magnetic flux cancellation effect.

[0068] Reference Fig.10 , Fig.11 and Fig.12 In some embodiments provided in the present application, the cable fixing device 1 may further include a limiting structure 15. The limiting structure 15 may be disposed on a side of the base 11 where the winding member 1211 is disposed, and may be staggered with the winding member 1211 and the isolation member 14. The limiting structure 15 extends away from the base 11. The limiting structure 15 may be used to limit the distance of the cable 2 from the base 11.

[0069] In this way, when the cable 2 is wound around the winding member 1211 for multiple times, the portions of the cable 2 wound around the same winding member 1211 for multiple times are located at the same position on the base 11, which can enhance the effect of canceling the magnetic flux.

[0070] In addition, the portion of the cable 2 extending in the first direction A and the portion extending in the second direction B are crossed. Since the portion of the cable 2 extending in the first direction A and the portion extending in the second direction B may cross multiple times, different crossing positions may affect the cancellation of magnetic flux. Furthermore, the cable 2 is wound on the winding member 1211 in the form of an 8-shaped winding, and the cable 2 is divided into two left and right parts. The different lengths of the left and right parts will also affect the cancellation of magnetic flux. Therefore, the cable 2 can be crossed at the middle position of the two winding members during the winding process.

[0071] Reference Fig.10 , Fig.11 and Fig.12 In some embodiments provided in the present application, the limiting structure 15 may include at least one first limiting component 151, the first limiting component 151 may be set at the midpoint of two adjacent winding members 1211, the first limiting component 151 includes at least two first limiting members 1511, and the two first limiting members 1511 are symmetrically arranged at the middle positions on the upper and lower sides of the base 11 to limit the cable 2 to cross at the position between the two first limiting members 1511.

[0072] In this way, the cable 2 can be crossed at the middle position of the two winding pieces 1211 during the winding process, and the portion of the cable 2 extending in the first direction A and the portion extending in the second direction B can have the same crossing position for multiple times. By winding the cable 2 on the winding piece 1211 in the form of an 8-shaped winding, the cable 2 can be divided into two left and right groups, and the lengths of the two groups are also the same, which can better offset the magnetic flux.

[0073] It should be noted that a first limiting end 15111 may be provided at the end of the first limiting member 1511 away from the base 11, and the edge of the first limiting end 15111 toward the cable 2 may exceed the outer edge of the connecting edge between the first limiting member 1511 and the base 11 to limit the cable 2 from being away from the base 11, thereby affecting the emission suppression effect.

[0074] In addition, if the cable 2 is wound loosely on the winding member 1211 or the number of turns is too many, the cable 2 may be at risk of escaping from the constraints of the cable fixing device on the winding member 1211.

[0075] Reference Fig.10 , Fig.11 and Fig.12In some embodiments provided in the present application, the limiting structure 15 may include at least one second limiting component 152. The second limiting component 152 may be arranged at at least one upper and lower side edge of the side of the base 11 on which the winding member 1211 is provided. The cable 2 abuts against the side of the first limiting component 151 to limit the cable 2 from moving away from the base 11. The second limiting component 152 includes at least two second limiting members 1521. The two second limiting members 1521 that are farthest apart are arranged at the farthest outer edges of the base 11.

[0076] In this way, when the cable 2 is wound loosely or too many times on the winding member 1211 , it is possible to prevent the cable 2 wound on the winding member 1211 from being separated from the restraint of the cable fixing device, thereby affecting the emission suppression effect.

[0077] It should be noted that when one side edge of the side of the base 11 on which the winding member 1211 is provided is connected to the chassis, the second limiting component 152 can be set at the other side edge of the side of the base 11 on which the winding member 1211 is provided.

[0078] In addition, the cable 2 at the inlet and outlet of the cable fixture 1 will have more cables 2 than other areas. Fig.10 , Fig.12 and Fig.13 The second limiting component 152 can be set at the upper and lower side edges of the side of the base 11 where the winding piece 1211 is provided. The height of the second limiting piece 1521 on the upper and lower side edges of the base 11 on one side of the midpoint of two adjacent winding pieces 1211 can be higher than the second limiting piece 1521 on the other side. The corresponding second limiting piece 1521 on the other side of the midpoint of two adjacent winding pieces 1211 is set oppositely. The heights of the second limiting pieces 1521 on both sides of the midpoint of two adjacent winding pieces 1211 can be different and staggered.

[0079] In this way, the second limiting piece 1521 at the position of a part of the cable 2 at the entrance and exit of the cable fixing device 1 can extend higher along the direction of the base 11 than other areas of the cable 2, so that there is more space for the cable 2 at the entrance and exit of the cable fixing device 1.

[0080] It should be noted that a second limiting end 15211 is provided at the end of the second limiting member 1521 away from the base 11, and the edge of the second limiting end 15211 facing the cable 2 exceeds the outer edge of the connecting side of the second limiting member 1521 and the base 11 to limit the cable 2 from moving away from the base 11.

[0081] In addition, the cable fixture 1 can be made of a variety of materials, but since non-insulating materials can absorb and conduct magnetic fields, the cable fixture 1 made of non-insulating materials will increase the magnetic field strength inside the device, thereby affecting the performance of the cable or signal. Figure 5 , Figure 6 and Figure 7 In some embodiments provided in the present application, the base 11 is an insulating member, and / or the plurality of winding structures 12 are insulating members.

[0082] In this way, the cable fixture 1 can prevent current leakage between the cable and the cable fixture 1 and prevent current from flowing into unintended paths, thereby ensuring that the current flows in two opposite directions as expected and preventing the increase in magnetic field strength inside the device and affecting the performance of the cable or signal.

[0083] It should be noted that the isolating member 14 and the limiting structure 15 on the cable fixing device 1 may also be insulating members.

[0084] In addition, the cable fixing device 1 can be arranged inside the computer case or on other equipment as needed, and a fixing device can be added to the base 11 so that the cable fixing device 1 is fixedly connected to the inside of the computer case or other equipment through the fixing device.

[0085] Reference Figure 1 and Figure 2 An embodiment of the present application provides a computer case, which includes: a case body, a cable fixing device 1 and a cable 2; the cable fixing device 1 is arranged in the case body; the cable fixing device 1 includes a base 11 and a plurality of winding structures 12, and the plurality of winding structures 12 are arranged on the base 11; the cable 2 is wound on the plurality of winding structures 12, and the cable 2 after being wound on different winding structures 12 includes a portion extending in a first direction A and a portion extending in a second direction B, and the portion of the cable 2 extending in the second direction B is in a near field area of ​​the portion of the cable 2 extending in the first direction A, and the second direction B is opposite to the first direction A.

[0086] The computer case provided in the embodiment of the present application includes the cable fixing device 1 provided in any embodiment of the first aspect, and therefore has the same technical effect, that is, the magnetic flux generated by the transmission current inside the cable 2 is opposite to the part extending in the second direction B of the cable 2 and the part extending in the first direction A of the cable 2. Since the multiple winding structures 12 constrain the mutual distance of the wound cable 2, the magnitude of the magnetic flux in opposite directions is basically equal, so that the electromagnetic flux generated by the part extending in the first direction A of the cable 2 and the part extending in the second direction B can offset each other, leaving only the electromagnetic flux generated by the cable 2 of the length between the multiple winding structures 12, thereby successfully reducing the external radiation emission, reducing electromagnetic interference, and suppressing the EMI of the cable 2 from exceeding the standard. After completing the mechanical assembly of the equipment, the overlong cable is fixed by the cable fixing device, which can greatly reduce the external radiation emission intensity of the system. Compared with the related art, there is a method of increasing the shielding material of the cable to enhance the shielding effectiveness of the cable or reducing the aperture of the chassis to reduce electromagnetic interference, but there are technical problems of high cost, difficulty in processing and high difficulty in assembly. The cable fixing device of the present invention has low cost, is easy to process, and is easy to assemble.

[0087] It should be noted that the computer case includes a fixing device, and the cable fixing device 1 is fixedly connected in the case through the fixing device.

[0088] The above is only an implementation method of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application.

Claims

1. A cable fixing device, characterized in that: include: Pedestal; A plurality of winding structures are arranged on the base, and the plurality of winding structures are used to wind the cable so that the cable after being wound on different winding structures has a portion extending in a first direction and a portion extending in a second direction, and the portion of the cable extending in the second direction is in a near field area of ​​the portion of the cable extending in the first direction, and the second direction is opposite to the first direction.

2. The cable fixing device according to claim 1, characterized in that: The maximum distance between adjacent portions of the cables extending in the first direction and portions extending in the second direction is between 10% and 20% of the distance between two winding structures that wind the cables in different directions.

3. The cable fixing device according to claim 1, characterized in that: The plurality of winding structures are used to wind the cable in different directions, and a portion of the cable extending in the first direction and a portion of the cable extending in the second direction are intersected.

4. The cable fixing device according to claim 3, characterized in that: The plurality of winding structures are at least two winding members, and the winding members extend away from the base, so that the cable is wound around two adjacent winding members in the first direction and the second direction respectively.

5. The cable fixing device according to claim 3, characterized in that: The plurality of winding structures are at least two winding grooves, the two winding grooves are arranged on both sides of the base, and a threading groove is arranged between the two sides of the base, so that after the cable is wound on the winding groove, the part of the cable extending in the first direction and the part extending in the second direction extend along the first surface of the base to the threading groove, and pass through the threading groove to extend along the second surface of the base, and the first surface and the second surface of the base are opposite.

6. The cable fixing device according to claim 3, characterized in that: The plurality of winding structures are a plurality of winding assemblies, each of which comprises two winding parts, and the plurality of winding assemblies are evenly arranged on the base.

7. The cable fixing device according to claim 4, characterized in that: It also includes at least two isolating members, which are arranged at intervals on the side of the base where the winding members are provided, and the isolating members extend away from the base. The isolating members are arranged at the midpoint between two adjacent winding members and at a position between one of the winding members, and the isolating members are used to limit the positions of the cables on both sides.

8. The cable fixing device according to claim 7, characterized in that: It also includes a limiting structure, which is arranged on the side of the base where the winding piece is provided, and is staggered with the winding piece and the isolation piece. The limiting structure extends away from the base, and is used to limit the distance of the cable away from the base.

9. The cable fixing device according to any one of claims 1 to 8, characterized in that: The base is an insulating member, and / or the plurality of winding structures are insulating members.

10. A computer case, characterized in that: include: Box; A cable fixing device is arranged in the box; The cable fixing device comprises a base and a plurality of winding structures, wherein the plurality of winding structures are arranged on the base; A cable, wherein the cable is wound on a plurality of winding structures, wherein the cable after being wound on different winding structures comprises a portion extending in a first direction and a portion extending in a second direction, wherein the portion of the cable extending in the second direction is within a near field area of ​​the portion of the cable extending in the first direction, and the second direction is opposite to the first direction.

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