CN215732606U

CN215732606U - Slip ring assembly for medical imaging equipment and medical imaging equipment

Info

Publication number: CN215732606U
Application number: CN202122178671.5U
Authority: CN
Inventors: 张新东
Original assignee: Shanghai United Imaging Healthcare Co Ltd
Current assignee: Shanghai United Imaging Healthcare Co Ltd
Priority date: 2021-09-09
Filing date: 2021-09-09
Publication date: 2022-02-01
Anticipated expiration: 2031-09-09

Abstract

The utility model relates to a slip ring assembly for a medical imaging device and the medical imaging device. A slip ring assembly for medical imaging equipment comprises a slip ring and a brush assembly, wherein the slip ring comprises a conductive ring, the conductive ring of the medical imaging equipment is provided with a conductive groove extending along the circumferential direction of the conductive ring, the brush assembly comprises flexible bristles, and the flexible bristles are in conductive contact with the inner wall of the conductive groove after being bent. The slip ring assembly is provided with the conductive grooves and the flexible bristles, so that the conductive efficiency between the brush assembly and the conductive ring is improved, and the poor contact between the brush assembly and the conductive ring is avoided.

Description

Slip ring assembly for medical imaging equipment and medical imaging equipment

Technical Field

The utility model relates to the technical field of medical imaging equipment, in particular to a slip ring assembly for medical imaging equipment and the medical imaging equipment.

Background

The slip ring assembly plays an important role in CT (computed tomography) equipment, and has a considerable influence on the performance of CT equipment by transmitting scan control commands and data acquired by scanning and providing power to a rotating part of scanning operation. The slip ring assembly includes a slip ring and a brush assembly. The brush assembly typically employs one of a carbon brush or a technical wire brush.

The carbon powder generated by the friction of the existing carbon electric brush during working is easy to cause the carbon powder pollution of other electric working parts in the same area to induce faults. The other metal brush has lower electrical contact performance and durability than the carbon brush, and although carbon powder is not generated in the work, the metal brush is easy to have poor contact with the conductive ring in the work, thereby causing the problems of communication failure or unstable communication signals.

SUMMERY OF THE UTILITY MODEL

In view of the above, there is a need to provide an improved slip ring assembly and medical imaging apparatus.

A slip ring assembly for medical imaging equipment comprises a slip ring and a brush assembly, wherein the slip ring comprises a conductive ring, the conductive ring of the medical imaging equipment is provided with a conductive groove extending along the circumferential direction of the conductive ring, the brush assembly comprises flexible bristles, and the flexible bristles are in conductive contact with the inner wall of the conductive groove after being bent.

Further, the brush assembly further comprises a brush disc, the flexible bristle portion is mounted on the brush disc, and the brush disc and the conductive ring are arranged along the radial direction or the axial direction of the conductive ring.

Further, the brush assembly further comprises a flexible cleaning brush, and the flexible bristles and the flexible cleaning brush are detachably arranged on the brush disc.

Further, the flexible bristles comprise a plurality of flexible tows, and the plurality of flexible tows are in conductive contact with the inner wall of the conductive groove after being bent;

the flexible tows are fixed on the brush disc and are arranged in an annular array.

Further, the flexible bristles are metal brushes, and the flexible tows are formed by bundling a plurality of metal wires.

Furthermore, the metal wire is in line contact with the inner wall of the conductive groove; and/or the presence of a catalyst in the reaction mixture,

the metal wire includes at least one of a copper alloy wire or a silver alloy wire.

Furthermore, the length of the flexible bristles extending into the conductive groove is greater than the depth of the conductive groove, so that the flexible bristles are in contact with the inner wall of the conductive groove after being bent.

Furthermore, the conductive groove is one of a square groove, a trapezoid groove or an arc groove, and the part of the flexible bristles extending into the conductive groove is matched with the shape of the conductive groove.

Furthermore, the inner wall of the conductive groove comprises two oppositely arranged side walls and a bottom wall connected between the two side walls, and the flexible bristles are in conductive contact with the side walls and the bottom wall respectively.

An embodiment of the utility model further provides a medical imaging device, which is characterized by comprising the slip ring assembly in any one of the above items.

An embodiment of the present invention further provides a medical imaging apparatus, including a stator assembly, a rotor assembly, and a slip ring assembly, the slip ring assembly including a slip ring and a brush assembly, the slip ring being disposed on one of the stator assembly or the rotor assembly, the brush assembly being disposed on the other of the rotor assembly or the stator assembly; the slip ring comprises a conductive ring, a conductive groove extending along the circumferential direction of the conductive ring is formed in the conductive ring, the brush assembly comprises a brush disc and flexible bristles fixed on the brush disc, the flexible bristles comprise flexible bristle parts or bent bristle parts, and the flexible bristle parts or the bent bristle parts are in conductive contact with the inner wall of the conductive groove; the brush disc and the conducting ring are arranged along the radial direction or the axial direction of the conducting ring, and the flexible brush hair part or the bent brush hair part is covered in the conducting groove by the brush disc.

Further, stator module includes fixed frame, the rotor subassembly includes rotatable frame, rotatable frame equipment in inside the fixed frame, just be equipped with bulb subassembly and detector assembly in the rotatable frame.

In one embodiment of the present invention, a slip ring assembly is provided. The slip ring component enables vegetation and air dust in the conductive groove to be thoroughly cleaned by arranging the replaceable flexible cleaning brush and the flexible brush hair part, so that the conductive efficiency between the brush component and the conductive ring is improved, and poor contact between the brush component and the conductive ring is avoided.

Drawings

FIG. 1 is a schematic view of a partial structure of a slip ring assembly in accordance with an embodiment of the present invention;

FIG. 2 is a schematic cross-sectional view of the conductive ring shown in FIG. 1;

FIG. 3 is a schematic view of the conductive ring of FIG. 2 with some elements omitted;

FIG. 4 is a schematic cross-sectional view of another embodiment of the conductive ring shown in FIG. 1;

FIG. 5 is a schematic cross-sectional view of another embodiment of the conductive ring shown in FIG. 1.

Description of the element reference numerals

100. A slip ring assembly; 10. a slip ring; 11. an insulating base; 12. conducting rings; 121. a conductive slot; 1211. a side wall; 1212. a bottom wall; 20. a brush assembly; 21. flexible bristles; 211. a flexible tow; 22. and (7) brushing the disc.

The present invention is described in further detail with reference to the drawings and the detailed description.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings and the detailed description. It should be understood that the detailed description and specific examples, while indicating the scope of the utility model, are intended for purposes of illustration only and are not intended to limit the scope of the utility model.

It will be understood that when an element is referred to as being "mounted on" another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present. When an element is referred to as being "secured to" another element, it can be directly secured to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. As used herein, the term "or/and" includes any and all combinations of one or more of the associated listed items.

An embodiment of the present invention provides a slip ring assembly for a medical imaging device, which is used for reliably transmitting data such as a power supply, a control signal, and an image between a rotary detector and a gantry in the medical imaging device such as a CT device. Of course, the slip ring assembly may also be used in other medical imaging devices.

Referring to fig. 1, fig. 1 is a partial schematic structural view of a slip ring assembly 100 according to an embodiment of the present invention.

The slip ring assembly 100 includes a slip ring 10 and a brush assembly 20. The brush assembly 20 is disposed at one side of the slip ring 10, and is in contact with and conducted to each other, thereby achieving electrical connection or reliable data transmission between internal components of the medical imaging apparatus.

In particular, the slip ring 10 comprises a conductive ring 12. The conductive ring 12 is adapted to be in intimate contact with the brush assembly 20 to effect an electrical connection therebetween. The slip ring 10 can slide relative to the brush assembly 20 when driven by an external power source; at this time, the brush assembly 20 can slide relative to the conductive ring 12, but the electrical connection action is always maintained.

Further, the slip ring 10 also comprises an insulating base 11. A plurality of concentric conducting rings 12 are embedded on an insulating base 11 with a ring groove; and a plurality of conductive rings 12 are concentrically arranged with the insulating base 11. The insulating base 11 is used to insulate the electrical connection between the conductive rings 12.

It should be noted that the concentrically arranged conductive rings 12 mean that the conductive rings 12 are arranged around the same axis.

The bristle portion in existing brush assemblies typically employs a carbon brush. Carbon powder is easily generated during the operation of the carbon electric brush, and further the carbon powder of other electric working components in the same area is easily polluted to induce faults. The other metal brush has lower electrical contact performance and durability than the carbon brush, and although carbon powder is not generated in the work, the metal brush is easy to have poor contact with the conductive ring in the work, thereby causing the problems of communication failure or unstable communication signals.

Referring to FIG. 2 and FIG. 3, FIG. 2 is a schematic cross-sectional view of the conductive ring 12 shown in FIG. 1; FIG. 3 is a cross-sectional view of the conductive ring 12 shown in FIG. 2 with some elements omitted.

In order to improve the above problems, the brush assembly 20 according to an embodiment of the present invention includes flexible bristles 21 and a brush plate 22. The brush disc 22 and the conductive ring 12 are arranged in a radial direction or an axial direction of the conductive ring 12. Correspondingly, as shown in fig. 2, the conductive ring 12 is provided with conductive grooves 121 adapted to the flexible bristles 21. The conductive groove 121 extends circumferentially along the conductive ring 12. The inner wall of the conductive groove 121 is always in contact with the flexible bristles 21, that is, the conductive groove 121 is opened along the sliding track of the flexible bristles 21 relative to the conductive ring 12. The flexible bristles 21 are bent to be in conductive contact with the inner walls of the conductive grooves 121. The flexible bristles 21 are bent to make sufficient contact with the inner wall of the conductive ring 121, so that the contact area between the brush assembly 20 and the conductive ring 12 is increased.

It is understood that in other embodiments, the flexible bristles 21 may be in direct conductive contact with the inner walls of the conductive grooves 121; the flexible bristles 21 may be disposed directly in the medical imaging device, and the brush tray 22 may be omitted accordingly; the installation position and arrangement of the brush disc 22 can be set according to actual requirements.

In one embodiment, the flexible bristles 21 comprise a flexible bristle portion or a bent bristle portion. The flexible bristle portion is connected to the brush plate 22. The bent bristle portion is located at an end of the flexible bristle portion remote from the brush plate 22 and extends into the conductive slot 121. The bent bristle part may be a part of the flexible bristles 21 that is bent to contact the inner wall of the conductive groove 121 when being mounted in the conductive groove 121; or may be bent before installation.

Of course, the flexible bristles 21 may be directly contacted with the inner wall of the conductive groove 121 without bending, and may be electrically connected.

In the present embodiment, the flexible bristles 21 are metal brushes. The arrangement is such that the flexible bristles 21 are easily bent and contact the inner wall of the conductive groove 121.

With this arrangement, the brush assembly 20 overcomes the problem of poor contact between the brush assembly 20 and the conductive ring 12 and improves the efficiency of electrical conduction between the brush assembly 20 and the conductive ring 12 by increasing the contact area between the flexible bristles 21 and the conductive ring 12.

In one embodiment, the brush plate 22 is disposed obliquely above the conductive ring 12; the flexible bristles 21 are mounted on the side of the brush disc 22 facing the conductive rings 12 and are in contact with the corresponding conductive rings 12. The brush plate 22 is used for fixedly mounting the flexible bristles 21. The brush disc 22 is fixed in the CT apparatus, and the conductive ring 12 is driven to rotate relative to the brush disc 22 through the insulating track, so that the flexible bristles 21 mounted on the brush disc 22 can slide corresponding to the conductive grooves 121 of the conductive ring 12.

Correspondingly, as shown in fig. 2, the conductive ring 12 is provided with conductive grooves 121 adapted to the flexible bristles 21. The inner wall of the conductive groove 121 is always in contact with the flexible bristles 21, that is, the conductive groove 121 is opened along the sliding track of the flexible bristles 21 relative to the conductive ring 12. The flexible bristles 21 are bent to be in conductive contact with the inner walls of the conductive grooves 121. The flexible bristles 21 are bent to make sufficient contact with the inner wall of the conductive ring 121, so that the contact area between the brush assembly 20 and the conductive ring 12 is increased.

Further, the conductive ring 12 is a brass guide. So configured, the conductive resistance of the conductive ring 12 can be reduced.

In one embodiment, the brush plate 22 is disposed above the conductive ring 12; the flexible bristles 21 are mounted on the side of the brush disc 22 facing the conductive rings 12 and are in contact with the corresponding conductive rings 12. The brush plate 22 is used for fixedly mounting the flexible bristles 21. The brush disc 22 is fixed in the CT apparatus, and the conductive ring 12 is driven to rotate relative to the brush disc 22 through the insulating track, so that the flexible bristles 21 mounted on the brush disc 22 can slide corresponding to the conductive grooves 121 of the conductive ring 12.

In the present embodiment, since the flexible brush 21 is bent and then electrically connected to the inner wall of the conductive groove 121, the corresponding brush plate 22 and the conductive ring 12 can be disposed obliquely, and it is not necessary to strictly ensure that the brush plate 22 and the guide rail surface are disposed in parallel; this makes it possible to reduce the difficulty of mounting the brush plate 22 accordingly (i.e. reduces the difficulty of aligning the external mounting brackets for fixing the brush plate 22, without the need to mount the brush plate 22 exactly in alignment). The inclination angle between the brush disc 22 and the guide surface can be set according to actual requirements, for example, the inclination angle range is between 0 ° and 20 °.

It will be appreciated that in other embodiments, the brush disc 22 and the end faces of the flexible bristles 21 corresponding to the brush disc 22 may also be arranged parallel to the guide surface; alternatively, the corresponding brush disk 22 may be omitted accordingly, and the flexible bristles 21 may be directly integrated into other components of the CT apparatus, as long as the flexible bristles 21 are in conductive contact with the conductive ring 12.

In one embodiment, the brush assembly 20 is provided with a plurality of sets of flexible bristles 21 along the width of the brush tray 22. Correspondingly, the conductive ring 12 is provided with a plurality of conductive grooves 121 at different diameters. The multiple groups of flexible bristles 21 are respectively and correspondingly arranged in different conductive grooves 121. The plurality of groups of flexible bristles 21 are bent to contact the inner walls of the corresponding conductive grooves 121. This is so arranged that each of the plurality of conductive grooves 121 can be brought into sufficient electrical contact with the corresponding flexible bristle 21.

Further, a plurality of groups of flexible bristles 21 are also sequentially arranged along the length direction of the brush disc 22. And the bending rates of the multiple sets of flexible bristles 21 in the length direction and the corresponding conductive grooves 121 are approximately the same, so that the multiple sets of flexible bristles 21 can slide along the conductive grooves 121 under the rotation of the conductive ring 12.

Preferably, as shown in fig. 1, a plurality of groups of brush discs 22 along the width and length directions of the brush discs 22 form an annular array arrangement, so that each group of flexible bristles 21 on the brush discs 22 can be in sufficient conductive contact with the inner wall of the corresponding conductive groove 121. The multiple groups of flexible bristles 21 arranged along the length direction of the brush disc 22 correspond to the conductive grooves 121 on the same conductive ring 12, the multiple groups of flexible bristles 21 can be arranged to be in sufficient conductive contact with the inner wall of the same conductive groove 121, and the contact of the multiple groups of flexible bristles 21 can correspondingly conduct different circuits, so that multiple groups of data such as power supplies, control signals and images can be effectively transmitted.

In one embodiment, as shown in FIG. 3, the flexible bristles 21 can extend into the conductive groove 121 by a length greater than the depth H1 of the conductive groove 121, so that the flexible bristles 21 are bent to contact the inner wall of the conductive groove 121. The length of the flexible bristles 21 that can extend into the conductive slot 121 is the bristle length H3. The flexible bristles 21 shown in fig. 3 are unbent flexible bristles 21; when the flexible bristles 21 are engaged with the conductive grooves 121, the protruding portions of the flexible bristles 21 are bent. Compared with the conventional flexible brush part which is perpendicular to the inner wall of the conductive ring and is in contact with the inner wall of the conductive ring, if the flexible brush part is slightly inclined, the problem that the part of the flexible brush part is not in contact with the conductive ring is likely to exist, and the problem of poor contact between the conductive ring and the flexible brush part is likely to be caused. In the present embodiment, the flexible bristles 21 can be fully contacted with the inner wall of the conductive groove 121 after being bent, so that the corresponding contact area is increased, and the problem of poor contact caused by improper installation of the flexible bristles 21 is avoided.

In one embodiment, the flexible bristles 21 comprise a plurality of flexible tows 211. The plurality of flexible strands 211 are bent to be in conductive contact with the inner wall of the conductive groove 121. Specifically, each flexible bristle 21 includes 4-8 flexible tows 211. The arrangement of the flexible tows 211 can correspondingly increase the contact area with the inner wall of the conductive groove 121, and is beneficial to processing and mounting the flexible bristles 21. The flexible filament bundle 211 may be formed by individual assembly and the flexible bristles 21 may be assembled from a plurality of flexible filament bundles 211. It is understood that in other embodiments, the flexible bristles 21 may be provided as one, two, three or more than nine flexible filament bundles 211, as long as the flexible filament bundles 211 can be bent to be in sufficient contact with the inner wall of the conductive groove 121.

Preferably, each flexible strand 211 is formed by bundling a plurality of wires (not numbered). The bundling of the metal wires means that a plurality of metal wires are bundled to form a bundle of metal wires with the end parts of the bundle aligned. So set up, be convenient for the bending of flexible silk bundle 211, and the tip shape of flexible silk bundle 211 after the bending can also be with the interior space looks adaptation of electrically conductive groove 121. That is, the end of the flexible filament bundle 211 formed by bundling the metal filaments, which is relatively far from the brush plate 22, can be bent in a plurality of directions as if the end of the bundled hair bundle is bent, and the bent flexible filament bundle 211 can greatly increase the contact area with the inner wall of the conductive groove 121.

Preferably, the material of the metal wire is a metal alloy, such as a copper alloy wire or a silver alloy wire, as long as it is a good electrical conductor. The metal wire is at least one of a copper alloy wire and a silver alloy wire, but may be a mixed alloy wire of both. By the arrangement, the manufacturing cost can be correspondingly reduced, and the flexibility of the flexible wire bundle 211 formed by the metal wires is in a better range.

It will be appreciated that in other embodiments, silver or copper wires may be used, as long as the conductive contact between the metal wires and the conductive ring 12 is achieved, regardless of the manufacturing cost or the bending degree.

In one embodiment, the wire is in line contact with the inner wall of the conductive slot 121. The wire is changed from point contact with the conductive ring to line contact after bending, so that the contact area between the wire and the inner wall of the conductive groove 121 can be increased. The contact area between the plurality of metal wires and the inner wall of the conductive groove is increased; the contact area with the inner wall of the conductive groove 121 is greatly increased due to the area increase accumulation of the plurality of wires.

Referring to FIGS. 4 and 5, FIG. 4 is a schematic cross-sectional view of another embodiment of the conductive ring shown in FIG. 1; FIG. 5 is a schematic cross-sectional view of another embodiment of the conductive ring shown in FIG. 1.

In the present embodiment, as shown in fig. 2, 4 and 5, the conductive groove 121 is one of a square groove, a trapezoidal groove or an arc groove. It should be noted that the conductive groove 121 is opened along the circumferential direction of the conductive ring 12, and the longitudinal section of the conductive groove 121 is substantially square, dovetail-shaped or arc-shaped. The shape of the flexible brush 21 is matched with the shape of the conductive groove 121, that is, the cross section shape and size of the flexible brush 21 can be approximately the same as the cross section shape and size of the groove body of the conductive groove 121; wherein the width L2 of the flexible bristles 21 is adapted to the width of the conductive slot 121, as shown in fig. 3. With such an arrangement, the flexible bristles 21 can be filled in the space formed by the inner wall of the conductive groove 121, and the flexible bristles 21 can be fully contacted with the inner wall of the conductive groove 121 after being bent.

Preferably, the inner wall of the conductive groove 121 includes two oppositely disposed sidewalls 1211 and a bottom wall 1212 connected between the two sidewalls 1211. The side walls 1211 and the bottom wall 1212 both function to make conductive contact with the bent flexible bristles 21. Compared with the conventional embodiment in which the conductive ring is not provided with the conductive groove, the two side walls 1211 and the bottom wall 1212 of the conductive groove 121 in the present embodiment, which are oppositely arranged, can increase the contact area with the flexible bristles 21.

It is understood that in other embodiments, the sidewall 1211 and the bottom wall 1212 can be connected to form an arc wall, or the sidewall 1211 and the bottom wall 1212 can be respectively an arc wall protruding outward or inward, as long as the contact area with the flexible bristle 21 can be increased.

In one embodiment, the brush assembly 20 further includes a flexible cleaning brush. Flexible bristles 21 or a flexible cleaning brush are detachably arranged on the brush disc 22. When the conductive ring 12 is accumulated with foreign dust, the flexible brush bristles 21 originally disposed on the brush tray 22 may be replaced with a flexible cleaning brush. This allows switching to a cleaning mode for cleaning the conductive ring 12. The flexible cleaning brush can replace the flexible bristles 21 that were originally used for conducting electricity. The flexible cleaning brush is used to clean the corresponding conductive groove 121. Because the conductive groove 121 is formed, the excrescences in the groove body, air dust and other impurities are difficult to remove, the replaceable flexible cleaning brush can extend into the conductive groove 121, is in full contact with the inner wall of the conductive groove 121, and is used for fully cleaning the inner wall of the conductive groove 121 under the rotating action of the conductive ring 12. After the cleaning mode is completed, the flexible bristles 21 are replaced, so that good electrical connection between the flexible bristles 21 and the conductive ring 12 can be achieved.

Specifically, the brush plate 22 is provided with a mounting groove. The flexible cleaning brush is clamped in the notch position of the mounting groove of the brush disc 22. The flexible cleaning brush is arranged outside the mounting groove in a protruding manner after being mounted, so that the flexible cleaning brush can be in contact with the conductive ring 12.

In this embodiment, the flexible cleaning brush may be a cleaning brush made of a material such as a cleaning sponge.

In one embodiment of the present invention, a slip ring assembly is provided. The slip ring component enables vegetation and air dust in the conductive groove to be thoroughly cleaned by arranging the replaceable flexible cleaning brush and the flexible brush hair part, so that the conductive efficiency between the brush component and the conductive ring is improved, and poor contact between the brush component and the conductive ring is avoided. So arranged, the medical imaging equipment with the slip ring component can be operated stably.

An embodiment of the utility model also provides a medical imaging device. The medical imaging device comprises a stator assembly, a rotor assembly and any one of the slip ring assemblies described above.

Specifically, the slip ring 10 is disposed on one of a stator assembly or a rotor assembly of the medical imaging device, and the brush assembly 20 is disposed on the other of the rotor assembly or the stator assembly.

In one embodiment, the stator assembly includes a stationary frame. The rotor assembly includes a rotatable frame. The rotatable frame is assembled inside the fixed frame, and the rotatable frame is provided with a bulb tube assembly and a detector assembly. The rotatable frame is used for driving the bulb tube assembly and the detector assembly to rotate, so that the detected object is scanned, and scanned data information is obtained.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the utility model. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A slip ring assembly for a medical imaging device comprises a slip ring (10) and a brush assembly (20), and is characterized in that the slip ring (10) comprises a conductive ring (12), the conductive ring (12) of the medical imaging device is provided with a conductive groove (121) extending along the circumferential direction of the conductive ring (12), the brush assembly (20) comprises flexible bristles (21), and the flexible bristles (21) are in conductive contact with the inner wall of the conductive groove (121) after being bent.

2. Slip ring assembly for a medical imaging device according to claim 1, wherein the brush assembly (20) further comprises a brush disc (22), the brush disc (22) being mounted with the flexible bristles (21), the brush disc (22) and the electrically conductive ring (12) being arranged in a radial or axial direction of the electrically conductive ring (12).

3. Slip ring assembly for a medical imaging device according to claim 2, wherein the brush assembly (20) further comprises a flexible cleaning brush, the flexible bristles (21) and the flexible cleaning brush being detachably arranged on the brush disc (22).

4. Slip ring assembly for a medical imaging device according to claim 2, wherein the flexible bristles (21) comprise a plurality of flexible tows (211), the plurality of flexible tows (211) being bent into electrically conductive contact with the inner wall of the electrically conductive groove (121);

the flexible tows (211) are fixed on the brush disc (22) and are arranged in an annular array.

5. Slip ring assembly for a medical imaging device according to claim 4, wherein the flexible bristles (21) are metallic brushes and the flexible filament bundle (211) is formed as a bundle of a plurality of metallic filaments.

6. Slip ring assembly for a medical imaging device according to claim 5, wherein the wire is in line contact with an inner wall of the conductive groove (121); and/or the presence of a catalyst in the reaction mixture,

7. Slip ring assembly for a medical imaging device according to claim 1, wherein the flexible bristles (21) extend into the conductive groove (121) for a length greater than the depth of the conductive groove (121) so that the flexible bristles (21) are bent to contact the inner wall of the conductive groove (121).

8. Slip ring assembly for a medical imaging device according to claim 1, wherein the conductive groove (121) is one of a square groove, a trapezoidal groove or an arc-shaped groove, and the portion of the flexible bristles (21) extending into the conductive groove (121) is adapted to the shape of the conductive groove (121).

9. Slip ring assembly for a medical imaging device according to claim 1, wherein the inner wall of the conductive groove (121) comprises two oppositely arranged side walls (1211) and a bottom wall (1212) connected between the two side walls (1211), the flexible bristles (21) being in conductive contact with the side walls (1211) and the bottom wall (1212), respectively.

10. A medical imaging device, characterized in that it comprises a slip ring assembly according to any of claims 1 to 9.

11. A medical imaging device comprising a stator assembly, a rotor assembly, and a slip ring assembly, characterized in that the slip ring assembly comprises a slip ring (10) and a brush assembly (20), the slip ring (10) being disposed on one of the stator or rotor assembly, the brush assembly (20) being disposed on the other of the rotor or stator assembly; the slip ring (10) comprises a conductive ring (12), a conductive groove (121) extending along the circumferential direction of the conductive ring (12) is formed in the conductive ring (12), the brush assembly (20) comprises a brush disc (22) and flexible bristles (21) fixed on the brush disc (22), the flexible bristles (21) comprise flexible bristle parts or bent bristle parts, and the flexible bristle parts or the bent bristle parts are in conductive contact with the inner wall of the conductive groove (121); the brush disc (22) and the conductive ring (12) are arranged along the radial direction or the axial direction of the conductive ring (12), and the flexible bristle part or the bent bristle part is covered in the conductive groove (121) by the brush disc (22).

12. The medical imaging device of claim 11, wherein the stator assembly includes a stationary gantry, the rotor assembly includes a rotatable gantry assembled inside the stationary gantry, and a bulb assembly and a probe assembly are provided on the rotatable gantry.