Modularized electric rotary connector

Abstract

The invention provides a modular electric rotary connector, which comprises a supporting part with a space inside and a rotor part arranged in the supporting part, an outer contact assembly in contact fit with the rotor part is arranged on the supporting part in a penetrating manner, and an inner contact part is arranged in the rotor part. The inner contact assembly is arranged in the rotor part, the inner conductor is led out from the interior of the rotor part, the structure is simple and orderly, the defect that wires need to be welded one by one is overcome, and the problems that a traditional wiring scheme is complex in circuit and difficult in wiring are solved; and in the assembling process, each lead does not need to be independently processed, so that the structure is simplified, the assembling efficiency is high, and a more flexible interface is provided for connecting the printed board.

Description

Technical Field

[0001] The present invention relates to the technical field of electric energy and signal transmission, and in particular to a connector. Background Art

[0002] Electric slip ring is also called collector ring, slip ring, collector ring, collector ring, etc. It can be used in electromechanical systems that can transmit power and signals from a fixed position to a rotating position while rotating continuously. It is a precision device that realizes the transmission of current, various signals, images, and gas and liquid between two pairs of relatively rotating devices. The present invention simplifies the product structure through modularization.

[0003] Existing rotary connector structures, such as Figure 1~Figure 4 As shown, it is composed of an upper support plate component 6, a lower support plate component 7, an existing rotor component 8 arranged between the upper support plate component 6 and the lower support plate component 7, and an existing shell 9 sleeved on the outer side of the upper support plate component 6 and the lower support plate component 7. The upper support plate component 6 and the lower support plate component 7 both include an existing support frame 10, and the existing support frame 10 is provided with a perforation for passing a plurality of brush wires 11 with a U-shaped structure, the opening end of the U-shaped structure penetrates the inner side of the existing support frame 10, and the other end is located on the outer side of the existing support frame 10, and the outer side of the existing support frame 10 is also provided with a plurality of external wires 12, and the plurality of external wires 12 are welded and connected to the plurality of brush wires 11 one by one. The rotary connector products generally have the problems of small size, difficulty in wiring, difficulty in realizing automation, and need to invest more manpower for manual production and assembly.

[0004] Specifically, the existing rotary connector structure has the following disadvantages: (1) The brush wire 11 is extremely thin, which is not only difficult to assemble, but also very easy to damage the brush wire 11 during the process of inserting the brush wire 11 into the existing support frame 10 and welding the brush wire 11 to the external conductor 12. The whole process is time-consuming, has a low pass rate and requires high operating ability of personnel.

[0005] (2) The operation process of the existing rotor component 8 is complicated. The inner conductor 13 needs to be welded inside the conductive ring of the existing rotor component 8. The diameter and width of the conductive ring are relatively small. While ensuring that the welding is reliable, the size of the welding point and the wire stripping must be strictly controlled to avoid short circuits and breakdowns between different circuits. Therefore, the operation requirements are extremely high.

[0006] (3) After the conductive ring welding is completed, the rotating shaft, conductive ring (with wire), and insulating ring of the existing rotor component 8 are assembled, and the inner wire 13 is passed through the front conductive ring and insulating ring in sequence, and finally passed through the rotating shaft. This process is difficult to automate, and due to the limited space inside the ring and the rotating shaft, the conductive ring closer to the back is more difficult to assemble.

[0007] The Chinese invention application with a publication date of 2023-01-13 and a publication number of CN115603137A discloses a brush structure, a brush and a conductive slip ring. The brush structure includes a brush holder and a brush wire assembly. The brush wire assembly includes a conductor plate and at least one group of brush wires. The conductor plate is detachably connected to the brush holder. Each group of the above-mentioned brush wires includes two groups of brush wires. One end of each group of brush wires is welded to the conductor plate, and the other end of each group of brush wires extends into the brush holder, and the two groups of brush wires in each group of brush wires are connected through the conductor plate. When assembling the brush, by providing a conductor plate separated from the brush holder, it is avoided that the operator directly fixes the brush wire on the brush holder. The brush wire is welded to the detachable conductor plate. Compared with operating directly on the brush holder, the conductor plate is unobstructed and has a more flexible operating space. At the same time, the brush wires no longer need to be inserted one by one into the wiring holes of the one-piece brush holder. The time taken to weld the brush wires to the conductor plate is much less than the time taken to perforate the brush wires in the brush holder. However, this application still requires welding the wires in the rotor component one by one before assembling the product. It is inevitable that each wire needs to be handled individually during the transfer process, making the process more cumbersome and inefficient. Summary of the invention

[0008] In view of the above technical problems, the present invention proposes a modular electric rotary connector to solve the problem that the rotary connector in the prior art needs to weld the wires in the rotor component one by one before assembling the product, and the assembly process also requires each metal wire to be handled individually, resulting in a cumbersome process.

[0009] In order to achieve the above object, the technical solution of the present invention is achieved as follows: A modular electric rotary connector comprises a support member with a space inside and a rotor component arranged in the support member, an external contact component contacting and cooperating with the rotor component is passed through the support member, and an internal contact component is arranged in the rotor component.

[0010] The present invention arranges an inner contact assembly inside the rotor component to lead the inner conductor out of the rotor component, which has a simple and orderly structure. It not only avoids the disadvantage of welding the wires one by one, but also avoids the problems of complex lines and difficult wiring in traditional wiring schemes. In addition, during the assembly process, it is not necessary to process each wire separately, which simplifies the structure, improves the assembly efficiency, and provides a more flexible interface for connecting printed circuit boards.

[0011] Furthermore, in order to facilitate the arrangement of multiple rows of inner conductors and select a suitable number of inner contact monomers as required, the inner contact component includes at least one inner contact monomer, in which an inner conductor is arranged, and the inner conductor is connected to the conductive ring of the rotor component.

[0012] Furthermore, in order to insulate the inner conductor of the internal wire, the inner contact unit includes an insulator wrapped around the outer side of the inner conductor, a spring structure connected to the inner conductor is provided on the outer side of the insulator, and a protrusion is provided at the end of the spring structure for contacting and conducting with the conductive ring.

[0013] Furthermore, in order to facilitate the arrangement of multiple inner contact monomers in rows, and to facilitate the arrangement of neat inner conductors of the wires and the connection of the inner conductors with the printed circuit board, the insulator is a rectangular plate structure, and matching positioning structures are provided between the insulators of adjacent inner contact monomers.

[0014] Furthermore, in order to facilitate the internal contact assembly to be installed inside the rotor component, a slotted body for inserting the internal contact component is provided inside the rotor component, and the inner surface of the conductive ring is exposed in the slot of the slotted body so that the internal contact component is in contact with the conductive ring.

[0015] Furthermore, in order to facilitate the connection between the printed circuit board and the rotor component, a guide pin for connecting the printed circuit board is provided at the end of the slotted slot body.

[0016] Furthermore, in order to modularize the external contact assembly and reduce the trouble of the assembly process, the external contact assembly includes an insulating plate and a contact piece arranged on the insulating plate; the insulating plate and the contact piece are fixed by forced installation, or the insulating plate and the contact piece are injection molded into an integrated structure.

[0017] Furthermore, in order to facilitate the connection between the external contact assembly and the conductive ring on the rotor component, the support member is provided with a forced slot for the external contact assembly to pass through, and the contact member elastically contacts the outer side of the conductive ring after passing through the forced slot.

[0018] Furthermore, in order to facilitate the assembly of the external contact assembly and the support component, four external contact assemblies are provided, with two in each group. The two groups of external contact assemblies are symmetrically arranged on the upper and lower sides of the support member, and the contact members on the two external contact assemblies in each group extend away from each other.

[0019] Furthermore, in order to limit the assembly between the support component and the rotor component, the support component is a cylindrical structure; or the support component includes an upper support member and a lower support member that are interlocked, and the inner side of the upper support member and / or the lower support member is provided with a step hole that cooperates with the rotor component, and a matching guide pin and / or guide hole is provided between the upper support member and the lower support member.

[0020] Beneficial effects of the present invention: 1. The contact piece of the inner contact assembly of the present invention contacts the inner ring of the conductive ring of the rotor component, and the outer contact assembly contacts the outer ring of the conductive ring of the rotor component, and can perform relative rotational motion, so that the inner conductors of the rotating end and the stationary end can be connected while the rotor rotates; 2. The external contact of the present invention comprises a contact piece and an insulating plate, which can be processed into a whole by strong assembly, bonding or injection molding, etc., which can completely eliminate the matching gap between the parts, so that the production and assembly accuracy is greatly improved; 3. The present invention can transmit electricity by contacting the contact piece with the conductive ring, which not only makes the assembly easier, but also eliminates the assembly gap of the external contact component and improves the assembly accuracy; 4. The internal contact assembly of the present invention is connected to the inside of the conductive ring of the rotor component through a spring structure, and the spring structure has elastic force to provide a holding force for the contact part; 5. The present invention greatly improves the contact stability by arranging the contact piece in an eight-shaped symmetrical structure and providing elastic force in the contact direction when the contact piece contacts the conductive ring; 6. The present invention distributes the external contact components on both sides of the support component through positioning surface matching and gap-free matching, thereby greatly improving the assembly accuracy; 7. The present invention provides a protruding structure on the external contact component to play a role in fixing and preventing it from falling off; 8. The present invention integrates all the contact parts into a whole through the external contact assembly, without the need to assemble them one by one, thus solving the problems of difficult assembly, low efficiency and easy deformation of filamentary contact parts; 9. The present invention simplifies the product structure by modularizing the internal and external contact components, the upper and lower support parts, and the rotor components. It does not need to assemble all the parts one by one, but can rely on precise tooling molds, which simplifies the manufacturing process and improves the precision of the parts. The structure is more intensive, which is convenient for realizing product automation and installation. 10. The present invention avoids the operator from directly fixing the brush wire on the brush holder by setting an insulating plate and a contact piece separated from the brush holder. The contact piece is fixed on the insulating plate. This structure has a more flexible operating space and a more diverse processing method. 11. The contact pieces of the present invention no longer need to be inserted into the wiring holes of the integrally formed brush holder one by one. The contact pieces and the insulating plate adopt an integral structure or the time taken to weld the contact pieces to the insulating plate is much shorter than the time taken to perforate the brush wires to the brush holder, which greatly improves the production and assembly efficiency of the brushes; 12. The modular internal conductor module of the present invention leads the rotating component out from the inside, which not only solves the problem of difficult wiring and messy wiring inside the slip ring, but also provides a more flexible interface. Not only traditional wiring can be performed at the interface between the internal contact component and the external contact component, but also printed circuit board welding can be performed, which greatly improves the modularization of the entire link and provides a new design solution for production automation in the field of rotary connectors. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 It is a schematic diagram of the exploded structure of an existing rotary connector; Figure 2 It is a structural schematic diagram of an upper support member of an existing rotary connector; Figure 3 It is a schematic diagram of the exploded structure of the upper support of the existing rotary connector; Figure 4 It is a schematic cross-sectional structure diagram of a rotor component of an existing rotary connector; Figure 5 It is a cross-sectional structural schematic diagram of the present invention; Figure 6 It is a schematic diagram of the explosion structure of the present invention; Figure 7 It is a schematic structural diagram of an inner contact unit of the present invention; Figure 8 It is a schematic structural diagram of two inner contact monomers of the present invention; Fig. 9 It is a schematic structural diagram of a rotor component of the present invention; Fig.10 It is a structural schematic diagram of the support component of the present invention; Fig.11 It is a schematic structural diagram of the support component and the external contact component of the present invention; Fig.12 It is a structural schematic diagram of the present invention and the printed circuit board; Fig.13 This is a schematic structural diagram of a support component according to Embodiment 11 of the present invention; Fig.14 This is a schematic diagram of the structure of the support component of Example 13 of the present invention.

[0023] Reference numerals in the figures: 1. Shell, 2. Support component, 21. Upper support member, 22. Lower support member, 23. Step hole, 24. Forced slot, 25. Guide pin, 26. Guide hole, 27. Sealing plate, 3. External contact assembly, 31. Contact member, 32. Insulating plate, 4. Rotor component, 41. Rotating shaft, 42. Conductive ring, 43. Insulating ring, 44. Bearing, 45. Slotted trough, 46. Guide pin, 5. Internal contact assembly, 51. Inner conductor, 52. Positioning protrusion, 53. Spring sheet structure, 54. Insulator, 6. Upper support plate component, 7. Lower support plate component, 8. Existing rotor component, 9. Existing shell, 10. Existing support frame, 11. Brush wire, 12. Outer wire, 13. Inner wire, 14. Printed circuit board. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] like Figures 5 to 13 As shown, a modular electric rotary connector according to Embodiment 1 of the present invention comprises a housing 1, an outer contact assembly 3, a support component 2, a rotor component 4 and an inner contact component 5, as shown in FIG. Figure 5 and Figure 6 As shown, the support component 2 can be an integral cylindrical structure or a combined structure, and there is an installation space for the rotor component 4 inside the support component 2. The rotor component 4 is arranged in the support component 2. In this embodiment, the external contact component 3 includes a plurality of external contact pieces 31, and the external contact pieces 31 are respectively penetrated on the support component 2. Among them, the rotor component 4 includes a conductive ring 42, and the part of the external contact component 3 that penetrates into the support component 2 is in contact with the conductive ring 42 of the rotor component 4. The outer shell 1 is sleeved on the outside of the support component 2 and the external contact component 3. The internal contact component 5 is arranged inside the rotor component 4, and the contact component 5 is provided with an inner conductor that is in contact with the conductive ring 42. In this embodiment, as Figure 6 As shown, the inner contact component 5 is a modular structure provided with an inner conductor 51, that is, the inner contact component 5 is pre-set as a whole with a relatively regular appearance, which is not only convenient for assembly with other accessories, but also convenient for selecting the appropriate number of inner contact components 5 according to needs. After the modular inner contact component 5 is assembled with the rotor component 4, one end of the inner conductor 51 on the inner contact component 5 can be in contact with the conductive ring 42 for conduction, and the other end of the inner conductor 51 passes through the rotor component 4, which is convenient for connection with the printed circuit board 14.

[0026] Furthermore, if Figure 7 and Figure 8 As shown, the inner contact component 5 includes at least one inner contact unit, in which an inner conductor 51 is provided, and the end of the inner conductor 51 is exposed at the end of the inner contact unit, so that after the inner contact component 5 is installed in the rotor component 4, the end of the inner conductor 51 is located on the outside of the rotor component 4.

[0027] Embodiment 2 is different from Embodiment 1 in that Figure 7 and Figure 8 As shown, the inner contact monomer includes an insulator 54 coated on the outer side of the inner conductor 51, and the inner conductor 51 and the insulator 54 are pre-arranged into an integral structure. A spring structure 53 is arranged on the outer side of the insulator 54, and the inner end of the spring structure 53 is connected to the inner conductor 51 in the insulator 54. The outer end of the spring structure 53 extends far away. After the inner contact monomer is inserted into the rotor component 4, the rotor component 4 will squeeze the spring structure 53 inwardly, and at the same time, the spring structure 53 will reset outwardly by elastic force so as to contact and conduct with the conductive ring 42 inside the rotor component 4. And, as shown in FIG. Figure 7 As shown, the spring structures 53 on both sides of each inner contact unit can be arranged symmetrically or staggered.

[0028] Furthermore, if Figure 7 and Figure 8 As shown, in this embodiment, the end of the spring structure 53 is provided with a protrusion for contacting and conducting with the inside of the conductive ring 42. In another optimized embodiment, the inner side of the conductive ring 42 is further provided with a contact groove that fits with the protrusion.

[0029] Embodiment 3 is different from Embodiment 2 in that Figure 7 and Figure 8 As shown, the insulator 54 is a rectangular plate structure. When the number of the inner contact monomers is greater than 1, a plurality of inner contact monomers are arranged in a row. The rectangular plate structure makes it easy to arrange the plurality of inner contact monomers in a row along the thickness direction. And the length direction of the inner contact monomer is arranged along the axis of the rotor component 4. The spring structure 53 is arranged on the surface corresponding to the thickness of the inner contact monomer. And, as shown in FIG. Figure 8 As shown, the spring structures 53 located on the same side of adjacent inner contact units can be arranged in an aligned or staggered manner.

[0030] Furthermore, if Figure 7 and Figure 8 As shown, a matching positioning structure is provided between the insulators 54 of adjacent inner contact monomers. The positioning structure includes a positioning protrusion 52 and a positioning groove provided on the mating surfaces of two adjacent inner contact monomers, that is, a positioning protrusion 52 is provided on the mating surface of one of the insulators 54 of the two adjacent inner contact monomers, and a positioning groove is provided on the mating surface of the other insulator 54.

[0031] In a preferred embodiment, a protrusion or a barb structure may be provided on the inner contact component to cooperate with the structure inside the rotor component 4 for fixation.

[0032] In another preferred embodiment, the insulator 54 is made of plastic.

[0033] Embodiment 4 is different from Embodiment 3 in that Fig. 9 As shown, the rotor component 4 is provided with a slotted body 45, and the slotted body 45 is provided with a slot for inserting the internal contact component 5, and the upper and lower sides of the slot pass through the slotted body 45 and extend to the conductive ring 42, so that the inner surface of the conductive ring 42 is exposed in the slot of the slotted body 45, so that after the internal contact component 5 is inserted into the slot, the spring structure on the internal contact component 5 can contact and conduct with the conductive ring 42.

[0034] Embodiment 5 is different from Embodiment 4 in that Fig. 9 As shown, the end of the slotted body 45 is exposed at the end of the rotor component 4, and a guide pin 46 for connecting the printed circuit board 14 is provided at the end of the slotted body 45, and the guide pin 46 and the inner conductor 51 are located at the same end. Fig.12 As shown, the guide pins 46 facilitate the connection and fixation of the printed circuit board and facilitate the connection between the inner conductors 51 and 51 at the same time.

[0035] Embodiment 6 is different from Embodiment 2 in that Fig.11 As shown, the external contact assembly 3 includes an insulating plate 32 and a contact piece 31 arranged on the insulating plate 32; the insulating plate 32 and the contact piece 31 are connected as a whole by forced fixing, that is, the insulating plate 32 and the contact piece 31 are tightly fitted and connected, which can not only fix the left and right but also ensure the position of the contact piece 31; or the insulating plate 32 and the contact piece 31 are formed into an integral structure by injection molding, so that the external contact assembly 3 is a modular overall structure, which is convenient for the assembly of the electric rotary connector.

[0036] Embodiment 7 is different from Embodiment 6 in that Figure 5 As shown, in this embodiment, the support component 2 includes an upper support component 21 and a lower support component 22 that are interlocked with each other. A cavity is formed between the interlocking upper support component 21 and the lower support component 22 for the rotor component 4 to be installed in the cavity.

[0037] Embodiment 8 is different from Embodiment 7 in that a matching guide pin 25 and / or guide hole 26 is provided between the upper support member 21 and the lower support member 22. Specifically, Fig.13As shown, a guide pin 25 is provided at one end of the upper support member 21, and a guide hole 26 is provided at the other end. A guide hole 26 matching with the guide pin 25 of the upper support member 21 is provided at one end of the lower support member 22, and a guide pin 25 matching with the guide hole 26 on the upper support member 21 is provided at the other end. In another embodiment, a guide pin 25 may be provided on one of the upper support member 21 and the lower support member 22, and a guide hole 26 matching with the guide pin 25 may be provided on the other.

[0038] Embodiment 9 is different from Embodiment 7 in that Fig.11 As shown, the upper support member 21 and the lower support member 22 are both provided with a forced slot 24 for the corresponding external contact assembly 3 to pass through. In this embodiment, the forced slot 24 is a long slot. The long slot on the upper support member 21 is arranged at the top of the upper support member 21 along the axis of the electric rotation connector. The long slot on the lower support member 22 is arranged at the bottom of the lower support member 22 along the axis of the electric rotation connector.

[0039] Furthermore, if Fig. 9 As shown, the outer side of the conductive ring 42 of the rotor component 4 is evenly distributed with insulating rings 43 in the circumferential direction, and an annular groove is formed between adjacent insulating rings on the outer side of the conductive ring 42. The outer surface of the conductive ring 42 is exposed in the groove, and the contact piece 31 of the external contact assembly 3 corresponds to the groove one by one. After the external contact assembly 3 and the support member 2 are assembled, the contact piece 31 penetrates the inner part of the support member 2 through the forced groove 24 and extends into the groove to elastically contact the outer side of the conductive ring 42. In addition, the contact piece 31 and the conductive ring 42 can perform relative rotational motion.

[0040] Embodiment 10 is different from Embodiment 9 in that Fig.11 As shown, there are four external contact components 3, two of which form a group, and the two groups of external contact components 3 are symmetrically arranged on the upper and lower sides of the support member 2, that is, one of the two groups cooperates with the upper support member 21, and the other group cooperates with the lower support member 22. The two external contact components 3 in the group that cooperates with the upper support member 21 are symmetrically arranged on the upper support member 21, and the contact members 31 on the two external contact components 3 extend in directions away from each other, so that the contact members 31 extending from the upper part into the support member 2 can elastically contact with the upper two sides of the outer periphery of the conductive ring 42; the two external contact components 3 in the group that cooperates with the lower support member 22 are symmetrically arranged on the outer side of the lower support member 22, and the contact members 31 on the two external contact components 3 extend in directions away from each other, so that the contact members 31 extending from the lower part into the support member 2 can elastically contact with the lower two sides of the outer periphery of the conductive ring 42. In addition, the contact members 31 of the external contact components 3 have an inward elastic force, so that the contact between the contact members 31 and the conductive ring 42 is more stable.

[0041] Furthermore, if Fig.11As shown, the top of the upper support member 21 is symmetrically provided with two forced slots 24 to cooperate with one group of external contact components 3. The bottom of the lower support member 22 is symmetrically provided with two forced slots 24 to cooperate with another group of external contact components 3.

[0042] Embodiment 11 is different from Embodiment 10 in that Fig.11 As shown, a convex structure 33 is provided on the side of the contact plate 32 of the external contact component 3, which can play a role in fixing and preventing the external contact component 3 from falling off after being assembled with the support component 2 through the forced groove 24.

[0043] Embodiment 12 is different from Embodiment 7 in that Fig. 9 As shown, in addition to the conductive ring 42 and the insulating ring 43, the rotor component 4 also includes a rotating shaft 41 and a bearing 44. The rotating shaft 41, the conductive ring 42, and the insulating ring 43 can be separate assembly structures, or they can be made into a whole by integral injection, so that the rotor component 4 is also a modular structure. The outer surface of the conductive ring 42 can be a flat, grooved or convex structure, and contacts the contact member 31 of the external contact component 3. The bearing 44 is arranged at both ends of the conductive ring 42, and the bearing 44 cooperates with the upper and lower support components 2 to provide rotation support for the rotor component 4.

[0044] Furthermore, the inner sides of the upper support member 21 and the lower support member 22 are provided with a stepped hole 23 that matches the rotor component 4. Fig.10 As shown, stepped holes 23 are provided at positions corresponding to the bearings 44 on the inner sides of both ends of the two supporting components 2 , and the bearings 44 are embedded in the stepped holes 23 and matched with the stepped holes 23 .

[0045] Embodiment 13 is different from Embodiment 6 in that Fig.14 As shown, the support component 2 is an integral cylindrical structure. In this embodiment, the support component 2 has a cavity for the rotor component 4 to be installed, and the end of the support component 2 is provided with an opening for the rotor component 4 to be installed, and the opening is blocked by a blocking plate 27.

[0046] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, a person of ordinary skill in the art should understand that any modification to the technical solutions described in the aforementioned embodiments, or any equivalent replacement of some or all of the technical features therein, within the spirit and principles of the present invention, and such modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention, and should all be included in the protection scope of the present invention.

Claims

1. A modular electric rotary connector, characterized in that: The invention comprises a support component (2) having a space therein and a rotor component (4) arranged in the support component (2); an external contact component (3) contacting and cooperating with the rotor component (4) is provided on the support component (2); and an internal contact component (5) is provided in the rotor component (4).

2. The modular electric rotary connector according to claim 1, characterized in that: The inner contact component (5) comprises at least one inner contact unit, an inner conductor (51) is provided in the inner contact unit, and the inner conductor (51) is connected to the conductive ring (42) of the rotor component (4).

3. The modular electric rotary connector according to claim 2, characterized in that: The inner contact piece monomer comprises an insulator (54) coated on the outside of the inner conductor (51), a spring sheet structure (53) connected to the inner conductor (51) is provided on the outside of the insulator (54), and a protrusion for contacting and conducting with the conductive ring (42) is provided at the end of the spring sheet structure (53).

4. The modular electric rotary connector according to claim 3, characterized in that: The insulator (54) is a rectangular plate structure, and matching positioning structures are provided between the insulators (54) of adjacent inner contact unit monomers.

5. The modular electric rotary connector according to any one of claims 2 to 4, characterized in that: A slotted slot body (45) for inserting the inner contact component (5) is provided in the rotor component (4), and the inner surface of the conductive ring (42) is exposed in the slot of the slotted slot body (45) so that the inner contact component (5) and the conductive ring (42) are in contact and conduction.

6. The modular electric rotary connector according to claim 5, characterized in that: A guide pin (46) for connecting to a printed circuit board (14) is provided at the end of the slotted slot body (45).

7. The modular electric rotary connector according to any one of claims 1 to 4 or 6, characterized in that: The external contact assembly (3) comprises an insulating plate (32) and a contact piece (31) arranged on the insulating plate (32); the insulating plate (32) and the contact piece (31) are fixed by forced installation, or the insulating plate (32) and the contact piece (31) are formed into an integrated structure by injection molding.

8. The modular electric rotary connector according to claim 7, characterized in that: The support component (2) is provided with a forced installation slot (24) for the external contact component (3) to pass through, and the contact piece (31) is elastically contacted with the outer side of the conductive ring (42) after passing through the forced installation slot (24).

9. The modular electric rotary connector according to claim 7, characterized in that: Four external contact components (3) are provided, with two of each component forming a group. The two groups of external contact components (3) are symmetrically arranged on the upper and lower sides of the support component (2), and the contact pieces (31) on the two external contact components (3) in each group extend in directions away from each other.

10. The modular electric rotary connector according to any one of claims 1 to 4, 6, 8 and 9, characterized in that: The support component (2) is a cylindrical structure; or the support component (2) comprises an upper support component (21) and a lower support component (22) that are interlocked with each other, the inner side of the upper support component (21) and / or the lower support component (22) is provided with a stepped hole (23) that matches the rotor component (4), and a matching guide pin (25) and / or guide hole (26) are provided between the upper support component (21) and the lower support component (22).

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