A slip ring resistant to electromagnetic radiation

Abstract

The present invention discloses a slip ring that resists electromagnetic radiation, and relates to the field of electromagnetic protection technology, including a wire passing device, a columnar conductive shell, and a rotating body that is rotatably connected to the columnar conductive shell through a rotating connector; the slip ring is assembled by the columnar conductive shell and the conductive rotating body, and a sealing and conductive setting is performed between the columnar conductive shell and the conductive rotating body. While satisfying the basic conductive function of the slip ring, shielding treatment measures are taken, so that the slip ring as a whole has excellent shielding effectiveness in the full band, high electromagnetic shielding effectiveness, and meets the relevant requirements of the C-level electromagnetic shielding of the anti-information leakage standard GJB4216-2001, ensuring the security of confidential information. The wire passing device as a whole constitutes a stable and reliable rotating connection system, which ensures the power passing and signal transmission between the input cable and the output cable when the rotating body rotates 360° continuously, and effectively solves the problem of cable damage caused by rotation and winding.

Description

Technical Field

[0001] The invention relates to the technical field of electromagnetic protection, and in particular to a slip ring capable of resisting electromagnetic radiation. Background Art

[0002] With the rapid development of modern electronics and telecommunications industries and the popularization of electrical products, electromagnetic radiation is increasing in the environment we live in, and the resulting harm is becoming increasingly serious. Therefore, how to ensure that the impact of electromagnetic pollution on human health and equipment functions is minimized or even eliminated in the entire or local space environment, and to achieve electromagnetic shielding and compatibility has become one of the technical problems that need special attention and efforts to be made to solve.

[0003] At present, in the rotating structure of mechanical equipment, cables usually use a combination of beryllium copper reeds, metal wire mesh, and conductive graphite for electromagnetic shielding. The conductivity of conductive graphite is too low, resulting in low electromagnetic shielding efficiency. In addition, during long-term use, the beryllium copper reeds and metal wire meshes are excessively worn and need to be replaced frequently, which not only has high use and maintenance costs, but also easily leads to electromagnetic shielding failure. At the same time, during the continuous rotation of the rotating structure, the problem of wire entanglement is often encountered. Due to the constant rotation and entanglement of the cables, the cables are easily sprained, which increases the maintenance cost of the mechanical equipment. Summary of the invention

[0004] The purpose of the present invention is to provide an anti-electromagnetic radiation slip ring to solve the problems of low electromagnetic shielding efficiency in existing electromagnetic shielding equipment and the failure of electromagnetic shielding due to frequent replacement of individual parts due to easy wear.

[0005] To achieve the above object, the present invention provides the following solutions:

[0006] The present invention provides a slip ring for resisting electromagnetic radiation, comprising:

[0007] Columnar conductive housing;

[0008] A conductive rotating body, the conductive rotating body is arranged at one axial end of the columnar conductive shell, the conductive rotating body is rotatably connected to the columnar conductive shell through a rotating connecting piece, and the rotating connecting piece is conductive;

[0009] A wire passing device, the wire passing device is arranged in the columnar conductive housing, the wire passing device comprises a wire passing device stator and a wire passing device rotor, the wire passing device stator is connected to the columnar conductive housing, the wire passing device rotor is connected to the conductive rotating body, and the wire passing device rotor rotates and is conductively connected to the wire passing device stator;

[0010] The columnar conductive shell and the conductive rotating body are both provided with cable interfaces, and the cable interface on the columnar conductive shell is electrically connected to the stator of the wire passing device, and the cable interface on the conductive rotating body is electrically connected to the rotor of the wire passing device; one of the cable interface on the columnar conductive shell and the cable interface on the conductive rotating body is an input line interface, and the other is an output line interface.

[0011] Optionally, the columnar conductive shell is a cylindrical conductive shell, which includes a hollow cylindrical shell and a closed end plate arranged at the axial first end of the hollow cylindrical shell, the wire passing device stator is connected to the closed end plate, and the conductive rotating body is rotatably connected to the axial second end of the hollow cylindrical shell through the rotating connecting piece.

[0012] Optionally, the rotating connection member includes:

[0013] A conductive fixing seat, the conductive fixing seat is arranged at the axial second end of the hollow cylindrical shell, one side end surface of the conductive fixing seat is sealed and connected to the cylindrical conductive shell through a first seal, and the first seal has conductivity; the other side end surface of the conductive fixing seat is provided with a circular ring groove; the rotor of the wire passing device passes through the conductive fixing seat and is connected to the conductive rotating body;

[0014] A retainer, the retainer is riveted into the annular groove, and a plurality of circular holes are evenly opened on the retainer along its circumference;

[0015] Conductive rolling ball, one conductive rolling ball is movably installed in any of the circular holes;

[0016] The conductive rotating body is provided with an annular protrusion matching the annular groove. The annular protrusion is embedded in the annular groove and contacts the outer surface of the conductive ball to achieve electrical connection between the conductive rotating body and the conductive fixing seat.

[0017] Optionally, the stator of the wire passing device includes a stator bracket and a brush, wherein the stator bracket is connected to the closed end plate, and mounting grooves are symmetrically arranged on both sides of the stator bracket, and the brushes are arranged in the mounting grooves; the rotor of the wire passing device includes a rotor bracket and a conductive ring, and a conductive ring is arranged on the rotor bracket, and any one of the brushes slides in contact with the conductive ring under the action of the brush spring pressure to transmit signals and currents.

[0018] Optionally, the stator bracket is a cylindrical rod coaxially arranged with the cylindrical conductive shell, one axial end of the stator bracket is connected with the closed end plate, and the brush is arranged on the outer side wall of the stator bracket; the rotor bracket is a cylindrical sleeve sleeved on the outside of the stator bracket, the cylindrical sleeve is coaxially arranged with the cylindrical conductive shell, and the conductive ring is sleeved on the inner wall of the rotor bracket.

[0019] Optionally, a control device is also included; a support plate is provided inside the cylindrical conductive shell, the control device is provided on the support plate and is pressed by the conductive fixing seat; the control device is used to control the rotation angle and rotation speed of the rotor of the wire passing device.

[0020] Optionally, the cable interface on the columnar conductive shell is the input line interface, and the cable interface on the conductive rotating body is the output line interface, and conductive rubber plates are provided between the input line interface and the outer wall of the columnar conductive shell, and between the output line interface and the outer wall of the conductive rotating body.

[0021] Optionally, fixing holes for connecting other accessories are provided on the end surface of the conductive rotating body on the side away from the cylindrical conductive shell, and on the end surface of the closed end plate on the side away from the cylindrical conductive shell.

[0022] Optionally, the hollow cylindrical shell and the closed end plate are sealed by a second seal, and both the first seal and the second seal are conductive rubber seals.

[0023] Optionally, the conductive rolling ball is a chrome steel nickel-plated sphere with a conductive lubricating oil layer coated on the outer surface.

[0024] Compared with the prior art, the present invention has achieved the following technical effects:

[0025] The anti-electromagnetic radiation slip ring proposed by the present invention is assembled by a cylindrical conductive shell and a conductive rotating body, and a sealing and conductive setting is performed between the cylindrical conductive shell and the conductive rotating body. While satisfying the basic conductive function of the slip ring, shielding treatment measures are taken to make the slip ring as a whole have excellent shielding effectiveness in the full band, high electromagnetic shielding effectiveness, and meet the relevant requirements of the anti-information leakage standard GJB4216-2001C-level electromagnetic shielding, which can effectively prevent information leakage and ensure the security of confidential information. The slip ring has a novel structure, light weight, and small size. The degree of wear during use is small, and the overall service life of the slip ring is extended, which solves the problem of electromagnetic shielding failure caused by long-term replacement due to component wear in the existing electromagnetic shielding device. In addition, by arranging a wire passing device inside the cylindrical conductive shell, the wire passing device as a whole relies on the elastic lap principle and the ingenious motion structure to form a stable and reliable rotation connection system. The wire passing device ensures that when the rotating body rotates 360° continuously, the input cable and the output cable are powered and the signal is transmitted, which effectively solves the problem of cable damage caused by rotation and winding.

[0026] From the above, it can be seen that the anti-electromagnetic radiation slip ring proposed by the present invention effectively solves the problems of cable winding and low electromagnetic shielding efficiency, or even easy failure, and can adapt to the diversity of user usage environments and meet the usage requirements of various occasions. This slip ring can be directly placed on the desktop for use, or fixed on a bracket for portable use. It is suitable for high-end industrial electrical equipment or precision electronic equipment with multi-function, high performance, high precision, and multi-element continuous rotation motion, such as: aerospace equipment, radar communication equipment, medical equipment, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0028] Figure 1 This is a schematic diagram of the overall structure of the anti-electromagnetic radiation slip ring disclosed in an embodiment of the present invention;

[0029] Figure 2 A schematic diagram of the exploded structure of the anti-electromagnetic radiation slip ring disclosed in an embodiment of the present invention;

[0030] Figure 3 It is a schematic diagram of the assembly between the rotating body and the fixed seat in the anti-electromagnetic radiation slip ring disclosed in an embodiment of the present invention;

[0031] Figure 4A schematic diagram of the cable connection inside the hollow cylindrical housing of the anti-electromagnetic radiation slip ring disclosed in an embodiment of the present invention;

[0032] Figure 5 It is a schematic diagram of the structure of the fixing assembly of the anti-electromagnetic radiation slip ring disclosed in an embodiment of the present invention.

[0033] Wherein, the accompanying drawings are marked as follows:

[0034] 100. Slip rings resistant to electromagnetic radiation;

[0035] 1. Fixed seat, 2. Cage, 3. Conductive ball, 4. Rotating body, 5. Columnar conductive shell, 6. Conductive rubber strip, 7. Control device, 8. Input line interface, 9. Wire passing device stator, 10. Wire passing device rotor, 11. Output line interface, 12. Cover plate, 13. Input cable, 14. Output cable, 15. Hollow cylindrical shell, 16. Conductive rubber sheet, 17. Bottom plate. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] One of the purposes of the present invention is to provide an anti-electromagnetic radiation slip ring to solve the problems of low electromagnetic shielding efficiency in existing electromagnetic shielding equipment and cable twisting caused by continuous rotation and winding of cables, thereby increasing the maintenance cost of mechanical equipment.

[0038] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0039] Embodiment 1

[0040] like Figure 1-Figure 5As shown, this embodiment provides an anti-electromagnetic radiation slip ring 100, which relates to electromagnetic wave information protection of the slip ring, and mainly includes sequentially arranging a rotating body 4 (i.e., the aforementioned conductive rotating body), a fixed seat 1, and a cylindrical conductive shell 5, wherein the fixed seat 1 and the cylindrical conductive shell 5 are connected to form a lower fixed component of the anti-electromagnetic radiation slip ring, and the rotating body 4 is a rotating component that can rotate relative to the above-mentioned fixed component. A circular groove is milled on the upper surface of the fixed seat 1, and the retaining frame 2 is riveted into the circular groove, and the conductive ball 3 is installed in the circular hole reserved on the retaining frame 2; a circular protrusion is arranged on the lower surface of the rotating body 4 at a position corresponding to the circular groove of the fixed seat 1, and the rotating body 4 is embedded in the circular groove through the circular protrusion, and it is ensured that the lower surface of the circular protrusion is in contact with the outer surface of the conductive ball 3. The rotating body 4 can rotate relative to the fixed seat 1, and during the rotation of the rotating body 4, the annular protrusion on the rotating body 4 contacts the outer surface of the conductive rolling ball 3, thereby reducing the gap between the rotating body 4 and the fixed seat 1; the conductive rolling ball 3 is a universal ball that can rotate freely in the circular hole of the retaining frame 2, and is preferably made of high-chromium steel with a Rockwell hardness between 61 and 65. The high-chromium steel ball has good wear resistance, strong impact resistance, and strong corrosion resistance. In order to meet the shielding requirements, the surface of the high-chromium steel ball can be nickel-plated to enhance the conductivity and oxidation resistance of the surface of the conductive rolling ball 3. At the same time, in actual operation, conductive lubricating oil can be applied to the outer surface of the conductive rolling ball 3. The conductive lubricating oil is a copper-containing paste with excellent conductive properties; during the rotation of the rotating body 4, the sliding friction is converted into rolling friction through the conductive rolling ball 3, which reduces the friction force and improves the mechanical efficiency. At the same time, electrical continuity is met to ensure the shielding effectiveness between the rotating body 4 and the fixed component below.

[0041] In this embodiment, the columnar conductive shell 5 is specifically a cylindrical conductive shell, which includes a hollow cylindrical shell 15 and a closed end plate, i.e., a bottom plate 17, arranged at the bottom end of the hollow cylindrical shell 15, and the fixing seat 1 is connected to the top end of the hollow cylindrical shell 15. The bottom surface of the fixing seat 1 is provided with a convex groove, and the corresponding position of the upper end surface of the hollow cylindrical shell 15 is provided with a groove, and the conductive rubber strip 6 is installed in the groove. The fixing seat 1 and the hollow cylindrical shell 15 are locked with countersunk screws, and the conductive rubber strip 6 is squeezed at the same time. The conductive rubber strip 6 is squeezed to deform it to meet the electrical continuity. The fixing seat 1 and the hollow cylindrical shell 15 form an embedded connection through a concave-convex structure, which can effectively block the leakage of electromagnetic waves and achieve a better shielding effect. The above-mentioned conductive rubber strip 6 is specifically an aluminum-silver-plated conductive rubber strip.

[0042] In this embodiment, the input line interface 8 is screwed and fixed at a position near the bottom plate 17 on the outer surface of the hollow cylindrical shell 15, and the output line interface 11 is screwed and fixed on the outer surface of the rotating body 4. All the input line interfaces 8 and the output line interfaces 11 are aviation connectors. A conductive rubber plate 16 of a suitable size is installed between the input line interface 8 and the outer wall of the hollow cylindrical shell 15, and a conductive rubber plate 16 of a suitable size is installed between the output line interface 11 and the outer wall of the rotating body 4 to ensure the shielding requirements at the input interface and the output interface in the slip ring. The aforementioned conductive rubber plate 16 is preferably an aluminum-silver-plated conductive rubber plate.

[0043] In this embodiment, a wire passing device is arranged inside the columnar conductive housing 5. The wire passing device stator 9 of the wire passing device includes a stator bracket and a brush, the stator bracket is connected to the closed end plate of the cylindrical conductive housing, that is, the bottom plate 17, and mounting grooves are symmetrically arranged on both sides of the stator bracket, and brushes are arranged in the mounting grooves; the wire passing device rotor 10 of the wire passing device includes a rotor bracket and a conductive ring, and the rotor bracket is provided with a conductive ring, and any brush is in sliding contact with the conductive ring under the action of the respective brush spring pressure, and the brushes on both sides of the stator bracket are in symmetrical bidirectional contact with the conductive ring to transmit signals and currents. As a preferred solution, the stator bracket is a cylindrical rod coaxially arranged with the cylindrical conductive shell, one axial end of the stator bracket is connected to the closed end plate, i.e., the bottom plate 17, and the brush is arranged on the outer wall of the stator bracket; the rotor bracket is a cylindrical sleeve sleeved on the outside of the stator bracket, the cylindrical sleeve is coaxially arranged with the cylindrical conductive shell, the inner wall of the rotor bracket is provided with a circular mounting groove, the conductive ring is embedded in the circular mounting groove, and the signal and current transmission between the stator bracket and the rotor bracket mainly depends on the elastic overlap between the conductive ring and the brush. The above-mentioned wire-passing device is installed from the bottom of the hollow cylindrical shell 15, and the stator bracket of the wire-passing device stator 9 is screwed and fixed on the bottom plate 17 with a combination screw, which is convenient for the connection and maintenance of the cables. At the same time, a mounting groove is provided on the upper surface of the bottom plate 17, and a conductive rubber sheet 16 is pasted on the inner circumference of the mounting groove. The conductive rubber sheet 16 is squeezed while the bottom plate 17 and the hollow cylindrical shell 15 are locked and fixed by countersunk screws. The conductive rubber sheet 16 is deformed after being squeezed, which can meet the sealing and electrical continuity between the bottom plate 17 and the hollow cylindrical shell 15. The conductive rubber sheet 16 is preferably an aluminum-silver-plated conductive rubber sheet. The stator 9 of the wire passing device, the fixing seat 1 and the columnar conductive shell 5 together constitute the fixed assembly of the slip ring. The wire passing device rotor 10 rotates and is electrically connected to the wire passing device stator 9, the input cable 13 electrically connects the input line interface 8 to the input end of the wire passing device stator 9, the output cable 14 electrically connects the output line interface 11 to the output end of the wire passing device rotor 10, and the rotor bracket of the wire passing device rotor 10 is fixed to the rotating body 4 by a combination screw to ensure that the rotating body 4, the output cable 14, the output line interface 11 and the wire passing device rotor 10 are connected as a whole, which can rotate 360° continuously around the wire passing device stator 9. During the 360° continuous rotation movement, the output cable 14 will not cause the cable to be twisted due to the continuous rotation of the wire passing device rotor 10, which not only greatly increases the work efficiency, but also extends the service life of the cable, reduces the maintenance cost, and effectively solves the problems of cable winding damage and shielding failure during rotation.

[0044] From the above, it can be seen that the wire-passing device serves as a conductive component connecting the input cable 13 and the output cable 14, and can also prevent the cables from being twisted. The wire-passing device as a whole relies on the elastic overlap principle between the stator and the rotor and the ingenious motion structure to form a stable and reliable rotational connection system, thereby ensuring the power supply and signal transmission of the rotating body 4 during 360° continuous rotation.

[0045] In this embodiment, the hollow cylindrical shell 15 is preferably cast from aluminum alloy, which not only meets the shielding effectiveness requirements but also meets the equipment's requirements for the mechanical strength of the material. The overall cylindrical conductive shell 5 is not only simple in style and beautiful, but also corrosion-resistant, high in pressure resistance, and durable.

[0046] In this embodiment, the control device 7 is installed in the hollow cylindrical shell 15, and the control device 7 is pressed and fixed on the support plate in the hollow cylindrical shell 15 through the fixing seat 1. The rotation angle and rotation speed of the rotor 10 of the wire passing device can be adjusted through the control device 7.

[0047] In this embodiment, a fixing hole is designed at the bottom of the bottom plate 17 to meet the use requirements of various occasions. The slip ring can be directly placed on a desktop for use, fixed on a bracket for portable use, or installed inside a chassis for use, so as to adapt to the diversity of user use environments. The cover plate 12 is arranged on the top surface of the rotating body 4. The cover plate 12 serves as the top cover plate of the entire slip ring structure, and a fixing hole is arranged on it, so that a radar host or other host equipment can be assembled as needed.

[0048] It can be seen that the anti-electromagnetic radiation slip ring proposed in this technical solution can adapt to the diversity of user use environments and meet the use requirements of various occasions. This slip ring can be directly placed on the desktop for use, or it can be fixed on a bracket for portable use. This slip ring effectively solves the problem of cable winding and low electromagnetic shielding efficiency, or even easy failure. By taking shielding treatment measures at the connection points of the various components of the slip ring, it has excellent shielding efficiency in the full band, meets the relevant requirements of the anti-information leakage standard GJB4216-2001C level electromagnetic shielding, and can effectively prevent information leakage and ensure the security of confidential information. This slip ring has a fashionable appearance, light weight, small size, good feel, and easy assembly. Suitable structural parts are selected, and the components inside the slip ring (i.e., inside the columnar conductive shell 5) are reinforced by a support plate or various screws, so that the slip ring as a whole meets the relevant requirements of vehicle-mounted vibration. This device is mostly used in high-end industrial electrical equipment or precision electronic equipment with multi-function, high performance, high precision, and multi-element continuous rotation motion. Such as: aerospace equipment, radar communication equipment, medical equipment, etc.

[0049] It should be noted that it is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention, and any figure mark in the claims should not be regarded as limiting the claims involved.

[0050] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A slip ring that resists electromagnetic radiation. It is characterized in that include: Columnar conductive housing; The columnar conductive shell is a cylindrical conductive shell, and the cylindrical conductive shell comprises a hollow cylindrical shell and a closed end plate arranged at an axial first end of the hollow cylindrical shell. A conductive rotating body, wherein the conductive rotating body is arranged at one axial end of the cylindrical conductive shell, the conductive rotating body is rotatably connected to the axial second end of the hollow cylindrical shell through a rotating connecting piece, and the rotating connecting piece is conductive; the rotating connecting piece comprises a conductive fixing seat, a retaining frame and a conductive rolling ball, the conductive fixing seat is arranged at the axial second end of the hollow cylindrical shell, one side end face of the conductive fixing seat is sealed and connected to the cylindrical conductive shell through a first sealing piece, and the first sealing piece is conductive; an annular groove is arranged on the other side end face of the conductive fixing seat; the retaining frame is riveted into the annular groove, and a plurality of circular holes are uniformly opened on the retaining frame along its circumference; a conductive rolling ball is movably installed in any of the circular holes; an annular protrusion matching the annular groove is arranged on the conductive rotating body, the annular protrusion is embedded in the annular groove, and contacts with the outer surface of the conductive rolling ball, so as to realize the electrical connection between the conductive rotating body and the conductive fixing seat; A wire-passing device, the wire-passing device is arranged in the columnar conductive housing, the wire-passing device comprises a wire-passing device stator and a wire-passing device rotor, the wire-passing device rotor passes through the conductive fixing seat and is connected to the conductive rotating body; the wire-passing device rotor rotates and is conductively connected to the wire-passing device stator; the wire-passing device stator comprises a stator bracket and a brush, the stator bracket is connected to the closed end plate, mounting grooves are symmetrically arranged on both sides of the stator bracket, and the brushes are arranged in the mounting grooves; the wire-passing device rotor comprises a rotor bracket and a conductive ring, the rotor bracket is provided with a conductive ring, and any one of the brushes is in sliding contact with the conductive ring under the action of the brush spring pressure to transmit signals and currents; A control device, wherein a support plate is disposed inside the cylindrical conductive housing, and the control device is disposed on the support plate and is pressed by the conductive fixing seat; the control device is used to control the rotation angle and rotation speed of the rotor of the wire passing device; The columnar conductive housing and the conductive rotating body are both provided with cable interfaces, and the cable interface on the columnar conductive housing is electrically connected to the stator of the wire passing device, and the cable interface on the conductive rotating body is electrically connected to the rotor of the wire passing device; One of the cable interface on the columnar conductive housing and the cable interface on the conductive rotating body is an input line interface, and the other is an output line interface.

2. The slip ring against electromagnetic radiation according to claim 1, It is characterized in that The stator bracket is a cylindrical rod coaxially arranged with the cylindrical conductive shell, one axial end of the stator bracket is connected with the closed end plate, and the brush is arranged on the outer side wall of the stator bracket; the rotor bracket is a cylindrical sleeve sleeved on the outside of the stator bracket, the cylindrical sleeve is coaxially arranged with the cylindrical conductive shell, and the conductive ring is sleeved on the inner wall of the rotor bracket.

3. The anti-electromagnetic radiation slip ring according to any one of claims 1 to 2, It is characterized in that The cable interface on the columnar conductive shell is the input line interface, and the cable interface on the conductive rotating body is the output line interface. Conductive rubber plates are provided between the input line interface and the outer side wall of the columnar conductive shell, and between the output line interface and the outer wall of the conductive rotating body.

4. The anti-electromagnetic radiation slip ring according to any one of claims 1 to 2, It is characterized in that The end surface of the conductive rotating body away from the cylindrical conductive shell and the end surface of the closed end plate away from the cylindrical conductive shell are both provided with fixing holes for connecting other accessories.

5. The anti-electromagnetic radiation slip ring according to any one of claims 1 to 2, It is characterized in that The hollow cylindrical shell and the closed end plate are sealed by a second sealing member, and both the first sealing member and the second sealing member are conductive rubber sealing members.

6. The anti-electromagnetic radiation slip ring according to any one of claims 1 to 2, It is characterized in that The conductive rolling ball is a chrome steel nickel-plated ball with a conductive lubricating oil layer coated on the outer surface.

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