Slip ring assembly and medical equipment with same

Abstract

A slip ring assembly (300) comprising: a base body (301) configured in a ring shape and adapted to be made of an insulating material, the base body (301) comprising, in an axial direction of the base body (301), a first side and a second side opposite the first side; at least one first conductor (310), the first conductor (310) being configured in a ring shape and adapted to be fixed on the first side or the second side; at least one second conductor (320), the second conductor (320) being configured in a ring shape and adapted to be fixed on the first side or the second side; wherein the first conductor (310) and the second conductor (320) are electrically insulated from each other, and the projections of the first conductor (310) and the second conductor (320) along the axial direction of the base body (301) are at least partially overlapped.

Description

Slip ring assembly and medical equipment having the same Technical Field

[0001] The present application relates to the field of magnetic resonance medical technology, and in particular to a slip ring assembly and a medical device having the slip ring assembly. Background Art

[0002] In modern medicine, imaging equipment is often used to obtain images of patients to facilitate diagnosis or treatment. For example, a magnetic resonance imaging device is used to obtain magnetic resonance images of tissues of patients, such as those with tumors, to clearly display the condition of the lesion and surrounding tissues, thereby accurately locating the lesion. Furthermore, treatment equipment (such as an electron linear accelerator) is used to perform precise radiation therapy based on magnetic resonance images. Magnetic resonance imaging and treatment devices can be used in combination, and slip ring assemblies can serve as power and communication media for the treatment device. When the slip ring assembly is energized, the magnetic field generated by the current flowing through the slip ring assembly interferes with the central magnetic field of the magnetic resonance imaging device, resulting in lower accuracy in magnetic resonance imaging.

[0003] Summary of the Invention

[0004] Based on this, it is necessary to provide a slip ring assembly that can effectively reduce the interference of the magnetic field generated by the current flowing through the slip ring assembly on the central magnetic field of the magnetic resonance imaging device, and has a compact structure and requires a small installation space, as well as a medical device having the slip ring assembly to address the above technical problems.

[0005] According to one aspect of the present application, a slip ring assembly is provided, comprising: a base body, the base body being configured in an annular shape and being adapted to be made of an insulating material, wherein along the axial direction of the base body, the base body comprises a first side and a second side opposite to the first side; at least one first conductor, the first conductor being configured in an annular shape and being adapted to be fixed on the first side or the second side; and at least one second conductor, the second conductor being configured in an annular shape and being adapted to be fixed on the first side or the second side; wherein the first conductor and the second conductor are electrically insulated from each other, and projections of the first conductor and the second conductor along the axial direction of the base body at least partially overlap.

[0006] In one embodiment, the first conductor and the second conductor are arranged on the same side of the substrate, and a first insulator is provided between the first conductor and the second conductor. The first insulator is suitable for electrically insulating the first conductor and the second conductor.

[0007] In one embodiment, the system further comprises at least one third conductor, wherein the third conductor is configured in a ring shape and is suitable for being fixed on the substrate. The third conductor is arranged on the same side of the substrate as the first conductor and the second conductor.

[0008] In one embodiment, an annular groove is provided on the base.

[0009] In one embodiment, the first conductor or the third conductor is disposed in the annular groove.

[0010] In one embodiment, a plurality of first electrical isolation grooves are provided on a portion of the first conductor that does not overlap with a projection of the second conductor along the axial direction of the substrate, and the plurality of first electrical isolation grooves are spaced apart from each other along the circumference of the first conductor.

[0011] In one embodiment, the plurality of first electrical isolation trenches are arranged at equal intervals in a circumferential direction of the first conductor.

[0012] In one embodiment, the plurality of first electrical isolation trenches extend in a radial direction of the first conductor.

[0013] In one embodiment, a plurality of second electrical isolation grooves are provided on a portion of the third conductor that does not overlap with a projection of the first conductor along the axial direction of the substrate, and the plurality of second electrical isolation grooves are spaced apart from each other along the circumference of the third conductor.

[0014] In one embodiment, the plurality of second electrical isolation trenches are arranged at equal intervals in a circumferential direction of the third conductor.

[0015] In one embodiment, the plurality of second electrical isolation trenches extend in a radial direction of the third conductor.

[0016] In one embodiment, the first conductor is arranged on the first side of the substrate, the second conductor is arranged on the second side of the substrate, the at least one first conductor and the at least one second conductor form a conductor set, and the slip ring assembly includes at least one conductor set.

[0017] In one embodiment, each of the conductor groups includes a first conductor and a second conductor, and the first conductor and the second conductor are configured so that projections of the first conductor and the second conductor along the axial direction of the substrate completely overlap.

[0018] In one embodiment, each of the conductor groups includes a first conductor and at least two second conductors, the projections of the first conductor and the at least two second conductors along the axial direction of the substrate at least partially overlap, and the at least two second conductors are configured to be electrically insulated from each other.

[0019] In one embodiment, the number of the first conductors is different from the number of the second conductors.

[0020] In one embodiment, a projection of each of the first conductors along the axial direction of the substrate at least partially overlaps with a projection of one of the second conductors along the axial direction of the substrate.

[0021] In one embodiment, the device further comprises a first brush and a second brush, wherein the first brush is adapted to form an electrical contact with the first conductor, and the second brush is adapted to form an electrical contact with the second conductor.

[0022] In one embodiment, the method further comprises a third brush adapted to make electrical contact with the third conductor.

[0023] According to another aspect of the present invention, a medical device is provided, comprising a treatment device, wherein the treatment device comprises a slip ring assembly according to any of the aforementioned embodiments, wherein the slip ring assembly is suitable for serving as a power supply medium or a communication medium for the treatment device.

[0024] In one embodiment, the device further comprises a magnetic resonance imaging device. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The above and other objects, features and advantages of the present invention will become more apparent through a more detailed description of the preferred embodiments of the present invention shown in the accompanying drawings. The same reference numerals indicate the same parts throughout the accompanying drawings, and the drawings are not intentionally drawn to scale with actual size, but rather to illustrate the subject matter of the present invention.

[0026] Other features, objects and advantages of the present invention will become more apparent upon reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0027] FIG1 is a perspective schematic diagram of a medical device according to one embodiment of the present application;

[0028] FIG2 is a plan view of a slip ring assembly in the prior art;

[0029] FIG3 is a schematic plan view of a slip ring assembly according to an embodiment of the present application;

[0030] FIG4 is a perspective schematic diagram of a slip ring assembly according to one embodiment of the present application;

[0031] FIG5 is a schematic cross-sectional view of the slip ring assembly shown in FIG4 ;

[0032] FIG6 is a perspective schematic diagram of a slip ring assembly according to one embodiment of the present application;

[0033] FIG7 is a schematic cross-sectional view of the slip ring assembly shown in FIG6 ;

[0034] FIG8 is a schematic cross-sectional view of a slip ring assembly according to an embodiment of the present application;

[0035] FIG9 is a perspective schematic diagram of a slip ring assembly according to one embodiment of the present application;

[0036] FIG10 is a schematic cross-sectional view of the slip ring assembly shown in FIG9 ;

[0037] FIG11 is a perspective schematic diagram of a slip ring assembly according to one embodiment of the present application;

[0038] FIG12 is a schematic cross-sectional view of the slip ring assembly shown in FIG11 ;

[0039] FIG13 is a perspective schematic diagram of a slip ring assembly according to one embodiment of the present application;

[0040] FIG14 is a schematic cross-sectional view of the slip ring assembly shown in FIG13 ;

[0041] FIG15 is a schematic cross-sectional view of a slip ring assembly according to one embodiment of the present application;

[0042] FIG16 is a schematic cross-sectional view of a slip ring assembly according to one embodiment of the present application; and

[0043] FIG17 is a schematic cross-sectional view of a slip ring assembly according to an embodiment of the present application. DETAILED DESCRIPTION

[0044] To facilitate understanding of the present application, a more comprehensive description of the present application will be provided below with reference to the accompanying drawings. The drawings illustrate preferred embodiments of the present application. However, the present application may be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and comprehensive understanding of the present disclosure.

[0045] It should be noted that when an element is considered to be "connected" to another element, it may be directly connected to the other element and integrated therewith, or there may be an intermediate element. The terms "mounted", "one end", "the other end" and similar expressions used herein are for illustrative purposes only.

[0046] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application pertains. The terms used herein in the specification of this application are for the purpose of describing specific embodiments only and are not intended to limit this application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0047] In order to make the purpose, technical solutions and advantages of this application more clear, the following further describes this application in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0048] Referring to FIG. 1 , FIG. 1 is a perspective schematic diagram of a medical device 10 according to one embodiment of the present application. The medical device 10 includes: a magnetic resonance imaging device 100; a treatment device 200; and a bed assembly 240. The magnetic resonance imaging device 100 is cylindrical with a hollow portion. The treatment device 200 is, for example, a linear accelerator 200. Alternatively, the treatment device 200 may be another suitable treatment device, which is not limited by the present application. The linear accelerator 200 includes: an accelerator stator 210; an accelerator drum 220; and electrical connection terminals 230. The accelerator stator 210 is fixedly disposed and has a circular first opening 2101. The accelerator drum 220 has a circular second opening 2201, and the second opening 2201 and the first opening 2101 share a common axis X. The accelerator drum 220 is configured to pivot relative to the accelerator stator 210 about the axis X. The slip ring assembly 300 is disposed on one side of the accelerator drum 210 and is coaxially arranged with the first opening 2101 and the second opening 2201. An electrical connection terminal 230 is disposed on the accelerator stator 210 and is electrically connected to the slip ring assembly 300. In this embodiment, the electrical connection terminal 230 is, for example, a carbon brush 230. Alternatively, the electrical connection terminal 230 may be another suitable electrical connection device, such as a metal brush, as long as it satisfies the requirement for electrical connection between the slip ring assembly 300 and the linear accelerator 200. This is not limited in this application. In this embodiment, the slip ring assembly 300 is disposed on the accelerator drum 220, and the electrical connection terminal 230 is disposed on the accelerator stator 210. When the linear accelerator 200 is in operation, the slip ring assembly 300 pivots with the accelerator drum 210, and the slip ring assembly 300 is electrically connected to the linear accelerator 200 via the carbon brush 230. Those skilled in the art will appreciate that the slip ring assembly 300 and the electrical connection terminal 230 may also be disposed in other suitable locations. As long as the slip ring assembly 300 and the electrical connection terminal 230 can slide relative to each other and the slip ring assembly 300 can be electrically connected to the linear accelerator 200 via the carbon brush 230, the present application does not limit the installation location of the slip ring assembly 300 and the electrical connection terminal 230. For example, the slip ring assembly 300 may alternatively be disposed on the accelerator stator 210, and the electrical connection terminal 230 may be disposed on the accelerator drum 220. When the linear accelerator 200 is operating, the carbon brush 230 pivots with the accelerator drum 210, and the slip ring assembly 300 is electrically connected to the linear accelerator 200 via the carbon brush 230. The bed assembly 240 is configured to be at least partially movable into the hollow portion of the magnetic resonance imaging apparatus 100, and the bed assembly 240 includes a bed board suitable for supporting a patient 400 to be examined or treated. When the medical device 10 is in operation, the patient 400 is positioned on the bed board of the bed assembly 240 , and the magnetic resonance imaging apparatus 100 is suitable for performing magnetic resonance imaging on a region of interest of the patient 400 to obtain a magnetic resonance image.The linear accelerator 200 is adapted to perform radiotherapy on the lesion tissue within the region of interest based on the magnetic resonance image. Preferably, the magnetic resonance imaging device 100 is capable of performing magnetic resonance imaging on the tissue region of interest at any time, such as before, during, or after radiotherapy. Preferably, the linear accelerator 200 is capable of performing radiotherapy on the lesion tissue within the region of interest based on a fused image formed by the magnetic resonance imaging and other types of images, thereby further improving the accuracy of the radiotherapy.

[0049] Referring to Figure 2, Figure 2 is a schematic plan view of a slip ring assembly 300' in the prior art. The slip ring assembly 300' includes a base 301', a first conductor 310', and a second conductor 320'. The first conductor 310' and the second conductor 320' are coaxially arranged on the same side of the base 301', and a first brush 311' and a second brush 321' are respectively arranged on the sides of the first conductor 310' and the second conductor 320' facing away from the base 301'. When the slip ring assembly 300' is energized, the magnetic field generated by the first conductor 310' and the second conductor 320' will interact with the central magnetic field of the magnetic resonance imaging device, thereby interfering with the normal operation of the magnetic resonance imaging device and reducing the accuracy of the magnetic resonance imaging.

[0050] Referring to Figures 1, 4, and 5, Figure 4 is a perspective schematic diagram of a slip ring assembly according to one embodiment of the present application; Figure 5 is a cross-sectional schematic diagram of the slip ring assembly shown in Figure 4. In the embodiment shown in Figures 4 and 5, the slip ring assembly 300 includes: a base 301; at least one first conductor 310; and at least one second conductor 320. The base 301 is configured as an annular sheet-like structure and is preferably made of an insulating material. In the axial direction of the base 301, the base 301 includes a first side and a second side opposite the first side. The first side can be the side facing away from the accelerator drum 220 or the side facing the accelerator drum 220. The first conductor 310 is configured as an annular sheet-like structure, and the second conductor 320 is configured as an annular sheet-like structure. The first conductor 310 and the second conductor 320 are electrically insulated from each other. The projections of the first conductor 310 and the second conductor 320 along the axial direction of the base 301 (e.g., parallel to the X-axis) at least partially overlap, i.e., have an overlapping area A.

[0051] In the embodiments shown in Figures 4 and 5, the first conductor 310 and the second conductor 320 are arranged on the same side of the substrate 301, for example, the first side or the second side. Alternatively, the first conductor 310 and the second conductor 320 may be arranged in other ways, for example, the substrate 301, the first conductor 310, and the second conductor 320 may be arranged on different sides of the substrate 301. It is sufficient that the projections of the first conductor 310 and the second conductor 320 along the axial direction of the substrate 301 at least partially overlap, and this application does not impose any restrictions on this.

[0052] In the embodiments shown in Figures 4 and 5, the substrate 301, the first conductor 310, and the second conductor 320 are coaxially arranged. Alternatively, the first conductor 310 and the second conductor 320 may be arranged in other ways, for example, the substrate 301, the first conductor 310, and the second conductor 320 may be non-coaxially arranged, as long as the projections of the first conductor 310 and the second conductor 320 along the axial direction of the substrate 301 at least partially overlap, which is not limited in this application.

[0053] In the embodiments shown in Figures 4 and 5, the first conductor 310 and the second conductor 320 have the same inner diameter, and the outer diameter of the first conductor 310 is larger than the outer diameter of the second conductor 320. In this case, the overlapping area of ​​the first conductor 310 and the second conductor 320 along the axial direction is equal to the projected area of ​​the second conductor 320 along the axial direction. Optionally, the inner and outer diameters of the first and second conductors 310 and 320 can be the same, or different, or one can be the same and the other different. It is sufficient that when observing the side of the substrate 301 on which the first and second conductors 310 and 320 are disposed, the first and second conductors 310 and 320 can be simultaneously visible. That is, the projections of the first and second conductors 310 and 320 along the axial direction of the substrate 301 at least partially overlap. For example, referring to Figure 3, in the embodiment shown in Figure 3, the inner and outer diameters of the first and second conductors 310 and 320 can be different, and the projections of the first and second conductors 310 and 320 along the axial direction of the substrate 301 have an overlapping area A.

[0054] In the slip ring assembly 300 according to this embodiment, the base 301, the first conductor 310, and the second conductor 320 are all configured as annular sheet structures. The structure of the slip ring assembly 300 in the axial direction of the base 301 (i.e., the X direction shown in FIG. 5 ) is very compact, thereby requiring a small axial installation space for the slip ring assembly 300. When the slip ring assembly 300 according to this embodiment is energized, because the projections of the first conductor 310 and the second conductor 320 along the axial direction of the base 301 at least partially overlap, the magnetic fields generated by the currents flowing in the portions of the first conductor 310 and the second conductor 320 corresponding to the overlapping region A at least partially cancel each other out. This reduces the interfering magnetic field generated in the slip ring assembly 300, thereby also reducing interference with the central magnetic field of the magnetic resonance imaging device, thereby optimizing the imaging quality and accuracy of the magnetic resonance imaging.

[0055] Continuing with reference to Figures 4 and 5, in this embodiment, a first insulator 302 is disposed between the first conductor 310 and the second conductor 320 to electrically insulate the first conductor 310 from the second conductor 320. Specifically, the first insulator 302 can be formed in an annular sheet shape, and the projected area of ​​the first insulator 302 along the axial direction of the base 301 is greater than or equal to the overlapping area of ​​the first conductor 310 and the second conductor 320 along the axial direction.

[0056] Continuing with reference to Figures 4 and 5, a plurality of first electrically isolating grooves 312 are further provided on portions of the first conductor 310 that do not overlap with the projection of the second conductor 320 in the axial direction of the substrate 301. In the portions of the first conductor 310 where the first electrically isolating grooves 312 are provided, current cannot flow in the circumferential direction of the first conductor 310. In this embodiment, each first electrically isolating groove 312 extends linearly on the first conductor 310, and the plurality of first electrically isolating grooves 312 are spaced apart from each other in the circumferential direction of the first conductor 310. Those skilled in the art will appreciate that the first electrically isolating grooves 312 may also have other shapes and arrangements, as long as they satisfy the requirement of preventing current from flowing in the circumferential direction of the first conductor 310 in the portions where the first electrically isolating grooves 312 are provided. This application does not limit the shape and arrangement of the first electrically isolating grooves 312. Alternatively, each first electrically isolating groove 312 may extend in a curved or zigzag pattern on the first conductor 310. Optionally, the plurality of first electrical isolation trenches 312 extend from an outer edge of a portion of the first conductor 310 that does not overlap with the second conductor 320 to an inner edge of a portion of the first conductor 310 that does not overlap with the second conductor 320. Optionally, the plurality of first electrical isolation trenches 312 are arranged at equal intervals in a circumferential direction of the first conductor 310. Optionally, the plurality of first electrical isolation trenches 312 extend in a radial direction of the first conductor 310.

[0057] In this embodiment, the slip ring assembly 300 further includes at least one first brush 311 and at least one second brush 321. The first brush 311 is adapted to establish electrical contact with the first conductor 310. The second brush 321 is adapted to establish electrical contact with the second conductor 320. In this embodiment, the first brush 311 and the second brush 321 are respectively disposed on the side of the first conductor 310 and the second conductor 320 away from the base 301. Those skilled in the art will appreciate that the first brush 311 and the second brush 321 can be disposed in other suitable locations as long as they can establish electrical contact with the first conductor 310 and the second conductor 320. Optionally, the first brush 311 is disposed on the radially inner or outer surface of the first conductor 310. Optionally, the second brush 321 is disposed on the radially inner or outer surface of the second conductor 320.

[0058] Furthermore, in another embodiment, an annular groove may be provided on the first side of the substrate 301 , and the first conductor 310 is provided in the annular groove. Preferably, the depth of the annular groove is equal to the thickness of the first conductor 310 .

[0059] In the embodiments shown in Figures 4 and 5, the number of first conductors 310 and the number of second conductors 320 can be the same or different. The projection of each first conductor 310 along the axial direction of the substrate 301 at least partially overlaps with the projection of one second conductor 320 along the axial direction of the substrate 301. At least one first conductor 310 and at least one second conductor 320 form a conductor set, and the slip ring assembly 300 includes at least one conductor set. Those skilled in the art will appreciate that the number of first conductors 310 and second conductors 320 in each conductor set, as well as the number of conductor sets in the slip ring assembly 300, can be selected based on actual needs. For example, in one embodiment, the conductor set includes one first conductor 310 and one second conductor 320, and the slip ring assembly 300 includes one conductor set. For example, in another embodiment, the conductor set includes two first conductors 310 and one second conductor 320, and the slip ring assembly 300 includes two conductor sets.

[0060] In the slip ring assembly 300 according to this embodiment, the base 301, the first conductor 310, and the second conductor 320 are all configured as annular sheet structures. The axial structure of the slip ring assembly 300 is very compact, requiring a small installation space. When the slip ring assembly 300 according to this embodiment is energized, because the projections of the first conductor 310 and the second conductor 320 along the axial direction of the base 301 at least partially overlap, the magnetic fields generated by the currents flowing in the portions of the first conductor 310 and the second conductor 320 corresponding to the overlapping region A at least partially cancel each other out. This reduces the interfering magnetic field generated in the slip ring assembly 300 and, in turn, reduces interference with the central magnetic field of the magnetic resonance imaging device. Furthermore, since the first conductor 310 is provided with a plurality of first electrical isolation grooves 312, current can flow only in the portion of the first conductor 310 and the second conductor 320 corresponding to the overlapping area A, thereby maximally reducing the current loop area of ​​the slip ring assembly 300, further reducing the interference magnetic field generated in the slip ring assembly 300, and further reducing the interference with the central magnetic field of the magnetic resonance imaging device, thereby ensuring the imaging accuracy of the magnetic resonance.

[0061] Referring to Figures 1, 6, and 7, Figure 6 is a perspective schematic diagram of a slip ring assembly 300 according to one embodiment of the present application; Figure 7 is a cross-sectional schematic diagram of the slip ring assembly 300 shown in Figure 6. In the embodiments shown in Figures 6 and 7, the structure and positional relationship of the first conductor 310 and the second conductor 320 are similar to those of the first conductor 310 and the second conductor 320 in the embodiments shown in Figures 3 to 5. In this embodiment, the ring assembly 300 further includes at least one third conductor 330. The third conductor 330 is configured as an annular sheet structure and is suitable for being fixed to the base 301. The third conductor 330 is arranged on the same side of the base 301 as the first conductor 310 and the second conductor 320. The third conductor 330 is electrically insulated from the first conductor 310 or the second conductor 320.

[0062] Optionally, the third conductor 330 is disposed between the first conductor 310 and the substrate 301 along the axial direction of the substrate 301, as shown in FIG7 . A second insulator 303 is disposed between the third conductor 330 and the first conductor 310. The second insulator 303 is adapted to electrically insulate the third conductor 330 from the first conductor 310. The third conductor 330 at least partially overlaps with the first conductor 310 along the axial direction of the substrate 301, thereby forming an overlapping region A along the axial direction of the substrate 301 with the first conductor 310, the second conductor 320, and the third conductor 330.

[0063] Optionally, the third conductor 330 is disposed on one side of the second conductor 320 along the axial direction of the substrate 301, and a third insulator is disposed between the third conductor 330 and the second conductor 320. The third insulator is adapted to electrically insulate the third conductor 330 from the second conductor 320. The third conductor 330 at least partially overlaps with the second conductor 310 along the axial direction of the substrate 301, thereby forming an overlapping region along the axial direction of the substrate 301.

[0064] Optionally, the third conductor 330 is disposed between the second conductor 320 and the base 301 along the axial direction of the base 301. Referring to FIG8 , a cross-sectional schematic diagram of a slip ring assembly 330 according to an embodiment of the present application is shown. In the embodiment shown in FIG8 , the first conductor 310 and the third conductor 330 are disposed on the same side of the base 301, the second conductor 320 is disposed on one side of the first conductor 310 and the third conductor 330 along the axial direction of the base 301, a first insulator 302 is disposed between the first conductor 310 and the second conductor 320, thereby electrically insulating the first conductor 310 and the second conductor 320, and a third insulator 304 is disposed between the third conductor 330 and the second conductor 320, thereby electrically insulating the third conductor 330 and the second conductor 320. The projections of the first conductor 310 and the second conductor 320 along the axial direction of the substrate 301 at least partially overlap to form an overlapping area A1. The projections of the third conductor 330 and the second conductor 320 along the axial direction of the substrate 301 at least partially overlap to form an overlapping area A3. Optionally, an electrical isolation groove is provided in the portion of the first conductor 310 that does not overlap with the projection of the second conductor 320 along the axial direction of the substrate 301. Optionally, an electrical isolation groove is provided in the portion of the third conductor 330 that does not overlap with the projection of the second conductor 320 along the axial direction of the substrate 301. Optionally, an electrical isolation groove is provided in the portion of the second conductor 320 that does not overlap with the projection of the first conductor 310 and the third conductor 330 along the axial direction of the substrate 301.

[0065] 6 and 7 , an annular groove 3011 is further provided on the first side of the base 301 , and the third conductor 330 is provided in the annular groove 3011 . Optionally, the first conductor 310 is provided in the annular groove 3011 .

[0066] In the embodiments shown in Figures 6 and 7 , the second insulator 303 is configured as an annular sheet structure. The projected area of ​​the second insulator 303 along the axial direction of the base 301 is greater than or equal to the axial overlapping area of ​​the third conductor 330 and the first conductor 310. Optionally, the sum of the thickness H1 of the second insulator 303 and the thickness H2 of the third conductor 330 is equal to the depth D1 of the annular groove 3011.

[0067] In the embodiment where the first conductor 310 is disposed in the annular groove 3011, the third conductor 330 is disposed on the second conductor 320, with the second insulator 303 disposed between the third conductor 330 and the second conductor 320. The second insulator 303 is adapted to electrically insulate the third conductor 330 from the second conductor 320. The third conductor 330 and the second conductor 310 at least partially overlap along the axial direction of the substrate 301. Optionally, the sum of the thickness of the second insulator 303 and the thickness of the first conductor 310 is equal to the depth of the annular groove 3011.

[0068] In the slip ring assembly 300 according to the embodiment shown in Figures 6 and 7, the base 301, the first conductor 310, the second conductor 320, and the third conductor 330 are all configured as annular sheet structures. The slip ring assembly 300 is very compact in the axial direction of the base 301 (i.e., the X direction shown in Figure 7), thereby requiring a small axial installation space for the slip ring assembly 300. When the slip ring assembly 300 according to this embodiment is energized, because the projections of the first conductor 310, the second conductor 320, and the third conductor 330 along the axial direction of the base 301 at least partially overlap, the magnetic fields generated by the current flowing through the portions of the first conductor 310, the second conductor 320, and the third conductor 330 corresponding to the overlapping region A at least partially cancel each other out. This reduces the interfering magnetic field generated in the slip ring assembly 300 and, in turn, reduces interference with the central magnetic field of the magnetic resonance imaging device, thereby optimizing the imaging quality and accuracy of the magnetic resonance imaging.

[0069] 7 , in this embodiment, a plurality of first electrical isolation trenches 312 are provided in a portion of the first conductor 310 that does not overlap with the second conductor 320 in the axial direction of the substrate 301, and a plurality of second electrical isolation trenches 332 are provided in a portion of the third conductor 330 that does not overlap with the first conductor 310 in the axial direction of the substrate 301. In the portions of the first and third conductors 310 and 330 in which the electrical isolation trenches are provided, current cannot flow in the circumferential direction of the first and third conductors 310 and 330. In this embodiment, each first electrical isolation trench 312 extends linearly on the first conductor 310; each second electrical isolation trench 332 extends linearly on the third conductor 330; the plurality of first electrical isolation trenches 312 are spaced apart from one another in the circumferential direction of the first conductor 310; and the plurality of third electrical isolation trenches 332 are spaced apart from one another in the circumferential direction of the third conductor 310. Those skilled in the art will appreciate that the first electrical isolation trenches 312 and the third electrical isolation trenches 332 may have other shapes and arrangements, as long as they satisfy the requirement of preventing current from flowing in the circumferential direction of the first conductor 310 and the third conductor 330 in the portions where the electrical isolation trenches are provided. This application does not limit the shapes and arrangements of the first electrical isolation trenches 312 and the third electrical isolation trenches 332. Alternatively, each first electrical isolation trench 312 may extend in a curved or zigzag pattern on the first conductor 310. Alternatively, each third electrical isolation trench 332 may extend in a curved or zigzag pattern on the third conductor 330. Alternatively, the plurality of first electrical isolation trenches 312 may extend from the outer edge of the portion of the first conductor 310 that does not overlap with the projection of the second conductor 320 in the axial direction of the substrate 301 to the inner edge of the portion of the first conductor 310 that does not overlap with the projection of the second conductor 320 in the axial direction of the substrate 301. Optionally, the plurality of third electrically isolating trenches 332 extend from the outer edge of the portion of the third conductor 330 that does not overlap with the projection of the second conductor 320 in the axial direction of the substrate 301 to the inner edge of the portion of the third conductor 310 that does not overlap with the projection of the second conductor 320 in the axial direction of the substrate 301. Optionally, the plurality of first electrically isolating trenches 312 are arranged at equal intervals in the circumferential direction of the first conductor 310. Optionally, the plurality of second electrically isolating trenches 332 are arranged at equal intervals in the circumferential direction of the third conductor 330. Optionally, the plurality of first electrically isolating trenches 312 extend radially of the first conductor 310. Optionally, the plurality of third electrically isolating trenches 332 extend radially of the third conductor 330.

[0070] In the embodiments shown in Figures 6 and 7 , the slip ring assembly further includes a third brush 331 adapted to establish electrical contact with the third conductor 330. The third brush 331 is adapted to establish electrical contact with the third conductor 330. In this embodiment, the third brush 331 is disposed on a side of the third conductor 330 away from the base 301. Those skilled in the art will appreciate that the third brush 331 may be disposed in other suitable locations as long as the requirement for establishing electrical contact with the third conductor 330 is met. Alternatively, the third brush 331 may be disposed on the radially inner or outer surface of the third conductor 330.

[0071] In the embodiments shown in Figures 6 and 7, the number of first conductors 310, second conductors 320, and third conductors 330 can be the same or different. At least one first conductor 310, at least one second conductor 320, and at least one third conductor 330 form a conductor set, and the slip ring assembly 300 includes at least one conductor set. Those skilled in the art will appreciate that the number of first conductors 310, second conductors 320, and third conductors 330 in each conductor set, as well as the number of conductor sets in the slip ring assembly 300, can be selected based on actual needs. For example, in one embodiment, a conductor set includes one first conductor 310, one second conductor 320, and one third conductor 330, and the slip ring assembly 300 includes one conductor set. In the radial direction of the body 301, the diameters of the annular conductors in each annular conductor set gradually increase or decrease.

[0072] In the slip ring assembly 300 according to this embodiment, the base 301, the first conductor 310, the second conductor 320, and the third conductor 330 are all configured as an annular sheet structure. This makes the axial structure of the slip ring assembly 300 very compact, requiring a small installation space. When the slip ring assembly 300 according to this embodiment is energized, because the projections of the first conductor 310, the second conductor 320, and the third conductor 330 along the axial direction of the base 301 at least partially overlap, the magnetic fields generated by the currents flowing through the portions of the first conductor 310, the second conductor 320, and the third conductor 330 corresponding to the overlapping region A at least partially cancel each other out. This reduces the interfering magnetic field generated in the slip ring assembly 300 and, in turn, reduces interference with the central magnetic field of the magnetic resonance imaging device. Furthermore, since a plurality of first electrical isolation grooves 312 and a plurality of second electrical isolation grooves 332 are respectively provided on the first conductor 310 and the third conductor 330, current can only flow in the portions of the first conductor 310, the second conductor 320 and the third conductor 330 corresponding to the overlapping area A, thereby maximally reducing the current loop area of ​​the slip ring assembly 300, further reducing the interference magnetic field generated in the slip ring assembly 300, and further reducing the interference with the central magnetic field of the magnetic resonance imaging device, thereby ensuring the imaging accuracy of the magnetic resonance.

[0073] Referring to Figures 9 and 10, Figure 9 is a perspective schematic diagram of a slip ring assembly according to one embodiment of the present application; Figure 10 is a cross-sectional schematic diagram of the slip ring assembly shown in Figure 9. In the embodiments shown in Figures 9 and 10, the first conductor 310, the second conductor 320, the first brush 311, and the second brush 321 are similar to those in the embodiments shown in Figures 3 to 5, except that at least one first conductor 310 and at least one second conductor 320 are arranged on different sides of the base 301.

[0074] In the embodiments shown in Figures 9 and 10, the number of first conductors 310 and second conductors 320 can be the same or different. At least one first conductor 310 and at least one second conductor 320 form a conductor set, and the slip ring assembly 300 includes at least one conductor set. Those skilled in the art will appreciate that the number of first conductors 310 and second conductors 320 in each conductor set and the number of conductor sets in the slip ring assembly 300 can be selected based on actual needs.

[0075] Alternatively, in the embodiments shown in Figures 11 and 12 , the conductor set includes a first conductor 310 and a second conductor 320, and the slip ring assembly 300 includes three conductor sets. In one conductor set, the projections of the first conductor 310 and the second conductor 320 along the axial direction of the base 301 at least partially overlap. Alternatively, the slip ring assembly 300 may include another suitable number of conductor sets, such as one, two, or four.

[0076] Alternatively, in the embodiments shown in Figures 13 and 14 , the conductor set includes one first conductor 310 and two second conductors 320, and the slip ring assembly 300 includes one conductor set. In one conductor set, the projections of the first conductor 310 and the two second conductors 320 along the axial direction of the base 301 at least partially overlap. Alternatively, the slip ring assembly 300 may include another suitable number of conductor sets, such as two, three, or four.

[0077] In the embodiments shown in Figures 9 and 10, 11 and 12, and 13 and 14, the base 301, first conductor 310, and second conductor 320 of the slip ring assembly 300 are all configured as annular sheet structures. The slip ring assembly 300 is very compact in the axial direction of the base 301 (i.e., the X direction shown in Figures 10, 12, and 14), thereby requiring a small axial installation space for the slip ring assembly 300. When the slip ring assembly 300 according to this embodiment is energized, because the projections of the first conductor 310 and the second conductor 320 along the axial direction of the base 301 at least partially overlap, the magnetic fields generated by the current flowing in the portions of the first conductor 310 and the second conductor 320 corresponding to the overlapping region A at least partially cancel each other out. This reduces the interfering magnetic field generated in the slip ring assembly 300 and, in turn, reduces interference with the central magnetic field of the magnetic resonance imaging apparatus, thereby optimizing the quality and accuracy of the magnetic resonance imaging.

[0078] Furthermore, in the embodiments shown in Figures 13 and 14, a plurality of third electrically isolating grooves (not shown) are provided in the portion of the first conductor 310 that does not overlap with the second conductor 320 in the axial direction of the substrate 301. In the portion of the first conductor 310 where the third electrically isolating grooves are provided, current cannot flow in the circumferential direction of the first conductor 310. In this embodiment, each third electrically isolating groove extends linearly on the first conductor 310, and the plurality of third electrically isolating grooves are spaced apart from each other in the circumferential direction of the first conductor 310. Those skilled in the art will appreciate that the third electrically isolating grooves may have other shapes and arrangements, as long as they satisfy the requirement that current cannot flow in the circumferential direction of the first conductor 310 in the portion where the third electrically isolating grooves are provided. This application does not limit the shape and arrangement of the third electrically isolating grooves. Alternatively, each third electrically isolating groove may extend in a curved or broken line pattern on the first conductor 310. Optionally, the plurality of third electrical isolation trenches extend from an outer edge of a portion of the first conductor 310 that does not overlap with the second conductor 320 to an inner edge of a portion of the first conductor 310 that does not overlap with the second conductor 320. Optionally, the plurality of third electrical isolation trenches are arranged at equal intervals in a circumferential direction of the first conductor 310. Optionally, the plurality of third electrical isolation trenches extend in a radial direction of the first conductor 310.

[0079] Furthermore, in the embodiments shown in Figures 13 and 14, the slip ring assembly 330 includes at least two second conductors 320. The two second conductors 320 are arranged on the same side of the base 301 and are electrically insulated from each other. The projections of the first conductor 310 and the two second conductors 320 along the axial direction of the base 301 partially overlap, forming a first overlapping area A1 and a second overlapping area A2. Optionally, a gap is provided between the two second conductors 320 to electrically insulate the at least two second conductors 320 from each other. Furthermore, an insulating material is provided in the gap between the two second conductors 320 to electrically insulate the at least two second conductors 320 from each other.

[0080] In the slip ring assembly 300 according to this embodiment, the base 301, the first conductor 310, and the second conductor 320 are all configured as annular sheet structures. The axial structure of the slip ring assembly 300 is very compact, requiring a small installation space. When the slip ring assembly 300 according to this embodiment is energized, because the projections of the first conductor 310 and the second conductor 320 along the axial direction of the base 301 at least partially overlap, the magnetic fields generated by the currents flowing in the portions of the first conductor 310 and the second conductor 320 corresponding to the overlapping region A at least partially cancel each other out. This reduces the interfering magnetic field generated in the slip ring assembly 300 and, in turn, reduces interference with the central magnetic field of the magnetic resonance imaging device. Furthermore, since a plurality of first electrical isolation grooves 312 are provided on the first conductor 310, current can flow only in the portion of the first conductor 310 and the second conductor 320 corresponding to the overlapping area A1 or A2, thereby maximally reducing the current loop area of ​​the slip ring assembly 300, further reducing the interference magnetic field generated in the slip ring assembly 300, and further reducing the interference with the central magnetic field of the magnetic resonance imaging device, thereby ensuring the imaging accuracy of the magnetic resonance.

[0081] Referring to Figure 15 , a conductor set of a slip ring assembly 300 according to one embodiment of the present invention is shown. The conductor set includes at least two first conductors 310 and at least three second conductors 320. The first conductors 310 and the second conductors 320 are arranged on different axial sides of a substrate 301. The projections of a first conductor 310 and two of the second conductors 320 along the axial direction of the substrate 301 at least partially overlap, forming an overlapping region. The projections of another first conductor 310 and another second conductor 320 along the axial direction of the substrate 301 at least partially overlap, forming another overlapping region. In this embodiment, the slip ring assembly 300 includes at least one conductor set. Alternatively, the slip ring assembly 300 may include another suitable number of conductor sets, such as two, three, or four.

[0082] Referring to Figure 16 , a conductor set of a slip ring assembly 300 according to one embodiment of the present invention is shown. The conductor set includes at least two first conductors 310 and at least three second conductors 320. The first conductors 310 and the second conductors 320 are respectively arranged on different sides along the axial direction of the base 301. The projections of each first conductor 310 and two of the second conductors 320 along the axial direction of the base 301 at least partially overlap, thereby forming an overlapping region. In this embodiment, the slip ring assembly 300 includes at least one conductor set. Alternatively, the slip ring assembly 300 may include another suitable number of conductor sets, such as two, three, or four.

[0083] Referring to Figure 17 , Figure 17 shows a conductor set of a slip ring assembly 300 according to one embodiment of the present invention. The conductor set includes at least two first conductors 310 and at least three second conductors 320. The first conductors 310 and the second conductors 320 are respectively arranged on different sides along the axial direction of the substrate 301. The projections of at least one first conductor 310 and at least one second conductor 320 along the axial direction of the substrate 301 at least partially overlap to form an overlapping area, and the projections of at least one second conductor 320 and any first conductor 310 along the axial direction of the substrate 301 do not overlap. In this embodiment, the slip ring assembly 300 includes at least one conductor set. Alternatively, the slip ring assembly 300 may include another suitable number of conductor sets, such as two, three, or four.

[0084] In the embodiments shown in Figures 15 to 17, an electrical isolation groove is optionally provided on a portion of the first conductor 310 that does not overlap with a projection of the second conductor 320 along the axial direction of the substrate 301. Alternatively, an electrical isolation groove is provided on a portion of the second conductor 320 that does not overlap with a projection of the first conductor 310 along the axial direction of the substrate 301.

[0085] In the embodiments shown in Figures 15 to 17, the base 301, the first conductor 310, and the second conductor 320 are all configured as annular sheet structures. The axial structure of the slip ring assembly 300 is very compact, requiring a small installation space. When the slip ring assembly 300 according to this embodiment is energized, because the projections of the first conductor 310 and the second conductor 320 along the axial direction of the base 301 at least partially overlap, the magnetic fields generated by the currents flowing in the portions of the first conductor 310 and the second conductor 320 corresponding to the overlapping region A at least partially cancel each other out. This reduces the interfering magnetic field generated in the slip ring assembly 300 and, in turn, reduces interference with the central magnetic field of the magnetic resonance imaging device. Furthermore, since the first conductor 310 or the second conductor 320 is provided with an electrical isolation groove, current can only flow in the portion of the first conductor 310 and the second conductor 320 corresponding to the overlapping area, thereby maximally reducing the current loop area of ​​the slip ring assembly 300, further reducing the interference magnetic field generated in the slip ring assembly 300, and further reducing the interference with the central magnetic field of the magnetic resonance imaging device, thereby ensuring the imaging accuracy of the magnetic resonance.

[0086] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0087] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and such modifications and improvements are all within the scope of protection of the present application. Therefore, the scope of protection of the present application shall be determined by the appended claims.

Claims

1. A slip ring assembly (300), comprising: A base (301), the base (301) is configured in a ring shape and is suitable for being made of an insulating material, and along the axial direction of the base (301), the base (301) includes a first side and a second side opposite to the first side; at least one first conductor (310), the first conductor (310) being configured in a ring shape and being adapted to be fixed on the first side or the second side; at least one second conductor (320), the second conductor (320) being configured in a ring shape and being adapted to be fixed on the first side or the second side; The first conductor (310) and the second conductor (320) are electrically insulated from each other, and projections of the first conductor (310) and the second conductor (320) along the axial direction of the substrate (301) at least partially overlap.

2. The slip ring assembly (300) according to claim 1, wherein: The first conductor (310) and the second conductor (320) are arranged on the same side of the substrate (301), and a first insulator (302) is provided between the first conductor (310) and the second conductor (320), wherein the first insulator (302) is suitable for electrically isolating the first conductor (310) and the second conductor (320).

3. The slip ring assembly (300) according to claim 2 further comprises at least one third conductor (330), wherein the third conductor (330) is configured in a ring shape and is suitable for being fixed on the base (301), and the third conductor (330) is arranged on the same side of the base (301) as the first conductor (310) and the second conductor (320).

4. The slip ring assembly (300) according to any one of claims 1 to 3, wherein: An annular groove (3011) is provided on the base (301).

5. The annular assembly (300) according to claim 4, wherein The first conductor (310) or the third conductor (330) is disposed in the annular groove (3011).

6. The slip ring assembly (300) according to claim 1, wherein A plurality of first electrical isolation grooves (312) are provided on a portion of the first conductor (310) that does not overlap with a projection of the second conductor (320) along the axial direction of the substrate (301), and the plurality of first electrical isolation grooves (312) are spaced apart from each other along the circumference of the first conductor (310).

7. The slip ring assembly (300) according to claim 6, wherein: The plurality of first electrical isolation trenches (312) are arranged at equal intervals in a circumferential direction of the first conductor (310).

8. The slip ring assembly (300) according to claim 6, wherein: The plurality of first electrical isolation trenches (312) extend in a radial direction of the first conductor (310).

9. The slip ring assembly (300) according to claim 3, wherein: A plurality of second electrical isolation grooves (332) are provided on a portion of the third conductor (330) that does not overlap with a projection of the first conductor (310) along the axial direction of the substrate (301), and the plurality of second electrical isolation grooves (332) are spaced apart from each other along the circumference of the third conductor (330).

10. The slip ring assembly (300) according to claim 9, wherein: The plurality of second electrical isolation trenches (332) are arranged at equal intervals in a circumferential direction of the third conductor (330).

11. The slip ring assembly (300) according to claim 9, wherein: The plurality of second electrical isolation trenches (332) extend in a radial direction of the third conductor (330).

12. The slip ring assembly (300) according to claim 1, wherein The first conductor (310) is arranged on the first side of the substrate (301), the second conductor (320) is arranged on the second side of the substrate (301), the at least one first conductor (310) and the at least one second conductor (320) form a conductor group, and the slip ring assembly (300) includes at least one conductor group.

13. The slip ring assembly (300) according to claim 12, wherein: Each of the conductor groups includes a first conductor (310) and a second conductor (320), and the first conductor (310) and the second conductor (320) are configured so that the projections of the first conductor (310) and the second conductor (320) along the axial direction of the substrate (301) completely overlap.

14. The slip ring assembly (300) according to claim 12, wherein: Each of the conductor groups includes a first conductor (310) and at least two second conductors (320), wherein projections of the first conductor (310) and the at least two second conductors (320) along the axial direction of the substrate (301) at least partially overlap, and the at least two second conductors (320) are configured to be electrically insulated from each other.

15. The slip ring assembly (300) according to claim 1, wherein The number of the first conductors (310) is different from the number of the second conductors (320).

16. The slip ring assembly (300) according to claim 1, wherein The projection of each first conductor (310) along the axial direction of the substrate (301) at least partially overlaps with the projection of one second conductor (320) along the axial direction of the substrate (301).

17. The slip ring assembly (300) according to claim 1, further comprising a first brush (311) and a second brush (321), wherein the first brush (311) is adapted to form an electrical contact with the first conductor (310), and the second brush (321) is adapted to form an electrical contact with the second conductor (320).

18. The slip ring assembly (300) according to claim 3, wherein: The invention further comprises a third brush (331), wherein the third brush (331) is adapted to form an electrical contact with the third conductor (330).

19. A medical device comprising a treatment device (200), wherein the treatment device (200) comprises a slip ring assembly (300) according to any one of claims 1 to 18, wherein the slip ring assembly (300) is suitable for serving as a power supply medium or a communication medium of the treatment device (200).

20. The medical device according to claim 19, further comprising a magnetic resonance imaging apparatus (100).

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