Roller assembly, steering wheel and vehicle

Abstract

The utility model provides a roller assembly, a steering wheel and a vehicle. The roller assembly comprises rollers. The impeller comprises a plurality of shielding parts which are arranged at intervals in the circumferential direction of the impeller; the optical coupler comprises a transmitting part and a receiving part, and the impeller is rotatably arranged between the transmitting part and the receiving part; the gear assembly is in transmission connection with the roller and is in transmission connection with the impeller through a driving shaft; the rolling wheel is installed in the shell, the shell is provided with a first installation hole which is formed in a penetrating mode, the first installation hole is in a closed round hole shape matched with the peripheral face of the driving shaft, and the driving shaft can be arranged in the first installation hole in a penetrating mode in the axial direction of the driving shaft. According to the roller assembly, the steering wheel and the vehicle, in the rotating process of the roller, the rotating precision of the impeller and the driving shaft connected with the impeller can be guaranteed, and therefore the adjusting precision of the roller is guaranteed.

Description

Technical Field

[0001] The present application relates to the field of vehicle technology, and in particular to a roller assembly, a steering wheel and a vehicle. Background Art

[0002] In order to make it easier for the driver to adjust the functions in the car, such as the volume of the car audio, the temperature of the air conditioning and other functions that need to be adjusted while driving the vehicle, a roller for the driver to manually adjust is usually installed on the steering wheel, so that the driver can adjust various functions in the car while driving.

[0003] Currently, the rotation of the roller assembly on the steering wheel is usually detected by an optical coupling structure. However, when the optical coupling structure detects the roller assembly in a rotating state, it may not be able to stably detect it, thereby affecting the adjustment accuracy of the roller. Utility Model Content

[0004] The roller assembly, steering wheel and vehicle provided in the present application can ensure the rotation accuracy of the impeller and the drive shaft connected thereto during the rotation of the roller of the roller assembly, thereby ensuring the adjustment accuracy of the roller.

[0005] The present application provides a roller assembly, which includes: a roller; an impeller, the impeller includes a plurality of shielding portions arranged at intervals along the impeller's circumference; an optical coupler, the optical coupler includes a transmitting portion and a receiving portion, and the impeller is rotatably arranged between the transmitting portion and the receiving portion; a gear assembly, which is transmission-connected to the roller and is transmission-connected to the impeller through a driving shaft; a shell, the roller is installed in the shell, the shell has a first mounting hole that is arranged through, the first mounting hole is in the shape of a closed circular hole that is adapted to the outer circumferential surface of the driving shaft, and the driving shaft can be inserted into the first mounting hole along its axial direction.

[0006] As above, the roller assembly, wherein the driving shaft includes a first shaft segment and a second shaft segment, the diameter of the second shaft segment is larger than the diameter of the first shaft segment, the first mounting hole is in the shape of a closed circular hole adapted to the outer circumferential surface of the second shaft segment, and the second shaft segment is axially inserted into the first mounting hole.

[0007] As in the roller assembly above, the gear assembly and the impeller are respectively arranged on opposite sides of the roller along the axial direction of the roller, and the opposite side walls of the shell are respectively provided with a first mounting hole and a second mounting hole which are penetrated, and the second mounting hole is in the shape of a circular hole which is adapted to the outer circumferential surface of the first shaft segment, and the second mounting hole has an opening.

[0008] In the roller assembly as above, the driving shaft further comprises a limiting portion protruding from the outer circumferential surface of the first shaft segment, the limiting portion is an annular structure, and the outer diameter of the limiting portion is smaller than the diameter of the first mounting hole and larger than the diameter of the second mounting hole.

[0009] The roller assembly as described above, wherein, along the axial direction of the roller, the gear assembly and the impeller are respectively arranged on opposite sides of the roller, and both of the oppositely arranged side walls of the housing have first mounting holes penetrating therethrough. The drive shaft has two second shaft segments arranged at intervals, and the two second shaft segments are respectively rotatably arranged in the two first mounting holes.

[0010] The roller assembly as described above, wherein the gear assembly includes a driving gear and a driven gear assembly engaged with each other. The driving gear is coaxially arranged with the roller and is rotationally connected thereto. The driven gear assembly is drivingly connected to the impeller through the drive shaft.

[0011] The roller assembly as described above, wherein the driven gear assembly includes a first driven gear and a second driven gear. The second driven gear has the same diameter as the driving gear. The first driven gear is engaged with both the driving gear and the second driven gear. The diameters of the driving gear and the second driven gear are both smaller than the diameter of the first driven gear. The second driven gear is coaxially arranged with the impeller and is rotationally connected thereto through the drive shaft, and the diameter of the second driven gear is smaller than the diameter of the first mounting hole.

[0012] The roller assembly as described above, wherein the driving gear and the roller are connected through a rotating shaft. The two ends of the rotating shaft are respectively connected to the rotation centers of the driving gear and the roller. The housing further has a rotating hole penetrating therethrough, and the rotating shaft is rotatably arranged in the rotating hole.

[0013] The roller assembly as described above, wherein the housing further has a connecting shaft protruding towards the gear assembly. The rotation center of the first driven gear has a connecting hole penetrating therethrough, and the first driven gear is rotationally connected to the connecting shaft through the connecting hole.

[0014] On the other hand, the present application further provides a steering wheel, wherein the steering wheel includes the roller assembly as described above. The steering wheel further includes a PCB board, and an optocoupler is mounted on the surface of the PCB board by SMT soldering.

[0015] On yet another aspect, the present application further provides a vehicle, wherein the vehicle includes the steering wheel as described above.

[0016] The roller assembly of the present application includes a roller, an impeller, an optocoupler, a housing, and a gear assembly. The roller is integrally installed inside the housing. The roller is drivingly connected to the gear assembly, and the gear assembly is drivingly connected to the impeller through a drive shaft. Since the shape of the first mounting hole on the housing matches the outer peripheral surface of the drive shaft, the drive shaft can be clamped in the first mounting hole. When the roller drives the gear assembly to rotate, the drive shaft connected to the gear assembly will not axially move, ensuring the rotation accuracy of the drive shaft. Since the impeller drivingly connected to the drive shaft includes a plurality of shielding portions arranged at intervals along its circumference, a detection light can be formed between the emitting portion and the receiving portion of the optocoupler. The rotation of the impeller enables the optocoupler to detect the shielding state of the shielding portion with respect to the detection light, enabling the optocoupler to stably reflect the rotation state of the roller, thereby ensuring the adjustment accuracy of the roller. Description of the Drawings

[0017] Figure 1 It is a schematic diagram of the overall structure of the roller assembly provided by an embodiment of the present application;

[0018] Figure 2 It is a schematic diagram of a partial structure of the roller assembly provided by an embodiment of the present application.

[0019] Description of the Reference Numerals in the Drawings:

[0020] 10. Roller; 20. Impeller; 21. Drive shaft; 211. First shaft section; 212. Second shaft section; 213. Limiting portion; 22. Shielding portion; 30. Optocoupler; 31. Emitting portion; 32. Receiving portion; 40. Housing; 41. First mounting hole; 42. Second mounting hole; 43. Rotation hole; 50. Gear assembly; 51. Driving gear; 52. Driven gear assembly; 521. First driven gear; 522. Second driven gear; 523. Connection hole;

[0021] 100. Roller assembly; 200. PCB board. Detailed Embodiments

[0022] In order to more clearly understand the above objects, features, and advantages of the present disclosure, the solutions of the present disclosure will be further described below. It should be noted that, without conflict, the embodiments of the present disclosure and the features in the embodiments may be combined with each other.

[0023] Many specific details are set forth in the following description in order to fully understand the present disclosure, but the present disclosure may also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only a part of the embodiments of the present disclosure, rather than all the embodiments.

[0024] Such as Figure 1 And Figure 2As shown in the figure, an embodiment of the present application provides a roller assembly, which includes: a roller 10; an impeller 20, the impeller 20 includes a plurality of shielding portions 22 spaced apart along its circumferential direction; an optocoupler 30, the optocoupler 30 includes a transmitting portion 31 and a receiving portion 32, and the impeller 20 is rotatably disposed between the transmitting portion 31 and the receiving portion 32; a gear assembly 50, which is in transmission connection with the roller 10 and is in transmission connection with the impeller 20 through a drive shaft 21; a housing 40, the roller 10 is installed in the housing 40, the housing 40 has a first mounting hole 41 penetrating therethrough, the first mounting hole 41 is in the shape of a closed circular hole adapted to the outer circumferential surface of the drive shaft 21, and the drive shaft 21 can axially penetrate through the first mounting hole 41.

[0025] Specifically, the roller assembly 100 of the embodiment of the present application includes a roller 10, an impeller 20, an optocoupler 30, a housing 40 and a gear assembly 50. The roller 10 is integrally installed inside the housing 40. The roller 10 is in transmission connection with the gear assembly 50, and the gear assembly 50 is in turn in drive connection with the impeller 20 through the drive shaft 21. The transmission of multiple gears of the gear assembly 50 can change the transmission ratio between the roller 10 and the impeller 20. Since the impeller 20 drivingly connected to the drive shaft 21 includes a plurality of shielding portions 22 spaced apart along its circumferential direction, the rotation of the impeller 20 enables the optocoupler 30 to detect the shielding state of the shielding portions 22, so that the optocoupler 30 can reflect the rotation state of the roller 10 through the rotation state of the impeller 20. Under the transmission action of the gear assembly 50, the detection of the rotation accuracy of the roller 10 by the optocoupler 30 is improved.

[0026] The optocoupler 30 includes a spaced-apart transmitting portion 31 and receiving portion 32. The transmitting portion 31 can emit a light source toward the receiving portion 32. The impeller 20 is rotatably disposed between the transmitting portion 31 and the receiving portion 32, and the rotation direction of the impeller 20 is perpendicular to the light source direction of the transmitting portion 31. When the impeller 20 rotates, the plurality of shielding portions 22 spaced apart in the circumferential direction can intermittently shield the light source emitted by the transmitting portion 31, so that the receiving portion 32 receives intermittent light source signals, thereby judging the rotation angle and rotation state of the roller 10.

[0027] For the roller assembly of the embodiment of the present application, the drive shaft 21 includes a first shaft section 211 and a second shaft section 212. The diameter of the second shaft section 212 is larger than that of the first shaft section 211. The first mounting hole 41 is in the shape of a closed circular hole adapted to the outer circumferential surface of the second shaft section 212, and the second shaft section 212 axially penetrates through the first mounting hole 41.

[0028] During specific implementation, the drive shaft 21 includes a first shaft section 211 with a smaller diameter and a second shaft section 212 with a larger diameter. Since the shape of the first mounting hole 41 on the housing matches the outer peripheral surface of the second shaft section 212, the second shaft section 212 can be clamped in the first mounting hole 41. When installing the drive shaft 21, since the second shaft section 212 is the part with the largest diameter of the entire drive shaft 21, the drive shaft 21 can be integrally installed through the first mounting hole 41 along its axial direction. After installation, the second shaft section 212 is rotatably arranged in the closed first mounting hole 41, enabling it to rotate stably without axial displacement, ensuring the rotational accuracy of the drive shaft 21 and thus ensuring the adjustment accuracy of the roller 10.

[0029] Specifically, the drive shaft 21 is formed by opening the upper die and the lower die of the mold. Since the drive shaft 21 is designed to include the first shaft section 211 and the second shaft section 212, the first shaft section 211 and the second shaft section 212 are axially connected along the drive shaft 21, and the diameters of the first shaft section 211 and the second shaft section 212 are different. Therefore, there is a stepped surface between the first shaft section 211 and the second shaft section 212, and this stepped surface can be used as the parting surface to enable the upper die and the lower die of the mold to open at this parting surface. Compared with the case where the integral circular shaft is opened along the axis and the parting line extends axially, opening the mold with the stepped surface as the parting surface will not have a parting line. When the drive shaft 21 rotates in the first mounting hole 41, the influence of the parting line on the rotational stability is avoided.

[0030] As Figure 1 and Figure 2 shown, for the roller assembly of the first embodiment of the present application, along the axial direction of the roller 10, the gear assembly 50 and the impeller 20 are respectively arranged on opposite sides of the roller 10. On the opposite side walls of the housing 40, there are respectively a first mounting hole 41 and a second mounting hole 42 penetrating through. The second mounting hole 42 is in the shape of a circular hole adapted to the outer peripheral surface of the first shaft section 211, and the second mounting hole 42 has an opening.

[0031] During specific implementation, the gear assembly 50 and the impeller 20 are respectively arranged on opposite sides of the roller 10, rather than being arranged in sequence in the same direction, which can reduce the space occupied by the roller assembly 100 in the axial direction of the roller 10; the first mounting hole 41 and the second mounting hole 42 penetrate through both sides of the housing 40. The second mounting hole 42 is in the shape of a circular hole with an opening, enabling the first shaft section 211 to be directly clamped into the second mounting hole 42 from the opening when installed into the second mounting hole 42. After the first shaft section 211 is installed, the entire drive shaft 21 can move axially, enabling the second shaft section 212 to enter the first mounting hole 41, thereby reducing the installation difficulty of the drive shaft 21.

[0032] As Figure 1 and Figure 2As shown in the figure, the roller assembly of the first embodiment of the present application. Among them, the drive shaft 21 further includes a limiting portion 213 protruding from the outer peripheral surface of the first shaft section 211. The limiting portion 213 has an annular structure, and the outer diameter of the limiting portion 213 is smaller than the diameter of the first mounting hole 41 and larger than the diameter of the second mounting hole 42.

[0033] During specific implementation, the limiting portion 213 is arranged in an annular structure, and its outer diameter is smaller than the diameter of the first mounting hole 41. When the first shaft section 211 is installed inside the second mounting hole 42 and the second shaft section 212 is installed inside the first mounting hole 41, the arrangement of the limiting portion 213 enables the drive shaft 21 to be stopped by the side wall of the housing 40 and unable to pass through the second mounting hole 42 when the drive shaft 21 is about to axially slide. Therefore, the limiting portion 213 can play a role in axially limiting the drive shaft 21, avoiding the situation that the drive shaft 21 has excessive axial displacement during rotation, which affects the transmission accuracy of the drive shaft 21; moreover, the diameter of the limiting portion 213 is also larger than the diameter of the second mounting hole 42, enabling the limiting portion 213 to pass through the second mounting hole 42 during the axial installation process of the drive shaft 21, without affecting the installation of the drive shaft 21.

[0034] For the roller assembly of the second embodiment of the present application, among which, along the axial direction of the roller 10, the gear assembly 50 and the impeller 20 are respectively arranged on opposite sides of the roller 10. Both of the relatively arranged side walls of the housing 40 have first mounting holes 41 penetrating therethrough. The drive shaft 21 has two second shaft sections 212 arranged at intervals, and the two second shaft sections 212 are respectively rotatably arranged in the two first mounting holes 41.

[0035] During specific implementation, in the roller assembly of the second embodiment of the present application, the drive shaft 21 has two second shaft sections 212, and the two second shaft sections 212 are arranged at both ends of the first shaft section 211 and rotatably arranged in the two first mounting holes 41. The two first mounting holes 41 can provide a support basis for the two second shaft sections 212 and also provide two support points for the entire drive shaft 21, making the rotation of the drive shaft 21 more stable, thereby ensuring the rotation stability of the impeller 20 and further ensuring the adjustment accuracy of the roller 10.

[0036] As Figure 1 and Figure 2 As shown in the figure, for the roller assembly of the embodiment of the present application, among which, the gear assembly 50 includes a driving gear 51 and a driven gear assembly 52 that are meshed and connected. The driving gear 51 is coaxially arranged with the roller 10 and is rotationally connected, and the driven gear assembly 52 is drivingly connected to the impeller 20 through the drive shaft 21.

[0037] In specific implementation, the gear assembly 50 includes a driving gear 51 and a driven gear assembly 52. The driving gear 51 is coaxially arranged with the roller 10 and is rotationally connected thereto, so that the roller 10 can rotate coaxially with the driving gear 51, and there is no need to provide teeth on the driving gear 51 for meshing connection with the driving gear 51. Thus, when the user rolls the roller 10, they will not touch the teeth, ensuring the feel of rolling the roller 10. Moreover, when the roller 10 and the driving gear 51 rotate coaxially, their rotation angles are the same, and the driving gear 51 can reflect the rotation state of the roller 10, facilitating the precise adjustment of the roller 10.

[0038] As Figure 1 and Figure 2 shown, for the roller assembly of the embodiment of the present application, the driven gear assembly 52 includes a first driven gear 521 and a second driven gear 522. The second driven gear 522 has the same diameter as the driving gear 51. The first driven gear 521 is meshingly connected to both the driving gear 51 and the second driven gear 522. The diameters of the driving gear 51 and the second driven gear 522 are both smaller than the diameter of the first driven gear 521. The second driven gear 522 is coaxially arranged with the impeller 20 and is rotationally connected through a drive shaft 21, and the diameter of the second driven gear 522 is smaller than the diameter of the first mounting hole 41.

[0039] In specific implementation, the driving gear 51 is rotationally connected to the roller 10, the second driven gear 522 is rotationally connected to the impeller 20, the first driven gear 521 is disposed between the driving gear 51 and the second driven gear 522 and is meshingly connected to both of them, and the diameter of the first driven gear 521 is larger, enabling the rotation of the driving gear 51 to be transmitted to the second driven gear 522, thereby realizing the transmission of rotation between the roller 10 and the impeller 20 with a certain distance therebetween.

[0040] Since the driving gear 51 and the second driven gear 522 have the same diameter and both are meshed with the first driven gear 521, the rotation angles of the driving gear 51 and the second driven gear 522 are always the same. The rotation state of the impeller 20 rotationally connected to the second driven gear 522 is exactly the same as the rotation state of the roller 10 rotationally connected to the driving gear 51, enabling the optocoupler 30 to stably reflect the rotation state of the roller 10, thereby ensuring the adjustment accuracy of the roller 10.

[0041] Optionally, the diameter of the second driven gear 522 can be smaller than the diameter of the driving gear 51. In this way, when the second driven gear 522 and the driving gear 51 rotate the same distance, the angle rotated by the second driven gear 522 is larger, resulting in a larger rotation angle of the impeller 20 relative to the roller 10, thereby improving the detection accuracy of the optocoupler 30 for the rotation angle of the roller 10.

[0042] As Figure 1 andFigure 2 As shown, in the roller assembly of the embodiment of the present application, the driving gear 51 and the roller 10 are connected by a rotating shaft, and both ends of the rotating shaft are respectively connected to the rotation center of the driving gear 51 and the rotation center of the roller 10. The housing 40 also has a through rotating hole 43, and the rotating shaft is rotatably arranged in the rotating hole 43.

[0043] During specific implementation, the rotating shaft between the driving gear 51 and the roller 10 can be installed in the rotating hole 43 and rotate stably, enabling the driving gear 51 to accurately reflect the rotation state of the roller 10, and then transmitting the rotation state of the roller 10 to the driven gear assembly 52 and the impeller 20, so that the optocoupler 30 can accurately read it to ensure the adjustment accuracy of the roller 10.

[0044] As Figure 1 and Figure 2 shown, in the roller assembly of the embodiment of the present application, the housing 40 also has a connecting shaft protruding towards the gear assembly 50. The rotation center of the first driven gear 521 has a through connecting hole 523, and the first driven gear 521 is rotationally connected to the connecting shaft through the connecting hole 523.

[0045] During specific implementation, a connecting shaft is provided on the housing 40, and the connecting shaft is inserted into the connecting hole 523 of the first driven gear 521, enabling the first driven gear 521 to rotate around the connecting shaft. The setting of the connecting shaft provides an installation basis for the first driven gear 521, enabling the first driven gear 521 to rotate stably and accurately transmitting the rotation of the driving gear 51 to the second driven gear 522, ensuring the overall transmission stability of the roller assembly.

[0046] As Figure 1 and Figure 2 shown, the embodiment of the present application also provides a steering wheel, which includes the above-mentioned roller assembly 100. The steering wheel further includes a PCB board 200, and the optocoupler 30 is installed on the surface of the PCB board 200 by SMT soldering.

[0047] It should be noted that the PCB (Printed Circuit Board) board is a printed circuit board, and SMT (Surface Mount Technology) is surface mount technology.

[0048] During specific implementation, the PCB board 200 can supply power, perform operations, and adjust the actions of the roller assembly 100, so that the roller assembly 100 can accurately control the in-vehicle functions; the optocoupler 30 is installed on the surface of the PCB board 200 by SMT soldering. Using SMT technology for installation, the connection reliability between the optocoupler 30 and the PCB board 200 is high, and the solder joint defect rate is low.

[0049] An embodiment of the present application also provides a vehicle, wherein the vehicle includes the above-mentioned steering wheel.

[0050] Specifically, in implementation, the vehicle of the embodiment of the present application includes a steering wheel, and a roller assembly 100 is arranged inside the steering wheel. A user can adjust functions capable of intensity adjustment in the vehicle through the roller assembly 100. The roller assembly includes a roller 10, an impeller 20, an optocoupler 30, a housing 40, and a gear assembly 50. The roller 10 is integrally installed inside the housing 40. The roller 10 is in transmission connection with the gear assembly 50. The gear assembly 50 is also in driving connection with the impeller 20 through a drive shaft 21. The drive shaft 21 includes a first shaft section 211 with a smaller diameter and a second shaft section 212 with a larger diameter. Since the shape of the first mounting hole 41 on the housing matches the outer peripheral surface of the second shaft section 212, the second shaft section 212 can be clamped in the first mounting hole 41. When installing the drive shaft 21, since the second shaft section 212 is the part with the largest diameter of the entire drive shaft 21, the drive shaft 21 can be integrally inserted through the first mounting hole 41 along its axial direction for installation. After installation, the second shaft section 212 is rotatably arranged in the closed first mounting hole 41, enabling it to rotate stably without axial movement, ensuring the rotation accuracy of the drive shaft 21. Since the impeller 20 in driving connection with the drive shaft 21 includes a plurality of shielding portions 22 spaced apart along its circumferential direction, the rotation of the impeller 20 enables the optocoupler 30 to detect the shielding state of the shielding portions 22, enabling the optocoupler 30 to stably reflect the rotation state of the roller 10, thereby ensuring the adjustment accuracy of the roller 10.

[0051] It should be noted that in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements not only includes those elements but also includes other elements not explicitly listed, or further includes elements inherent to such process, method, article, or device. Without further limitation, an element defined by the statement "comprising one..." does not exclude the existence of additional identical elements in the process, method, article, or device comprising the said element.

Claims

1. A roller assembly, characterized in that: include: Roller (10); An impeller (20), the impeller (20) comprising a plurality of shielding portions (22) arranged at intervals along the impeller's circumference; An optical coupler (30), the optical coupler (30) comprising a transmitting part (31) and a receiving part (32), the impeller (20) being rotatably disposed between the transmitting part (31) and the receiving part (32); A gear assembly (50) is drivingly connected to the roller (10) and is drivingly connected to the impeller (20) via a drive shaft (21); A housing (40), wherein the roller (10) is installed in the housing (40), and the housing (40) has a first mounting hole (41) extending therethrough, wherein the first mounting hole (41) is in the shape of a closed circular hole matching the outer peripheral surface of the drive shaft (21), and the drive shaft (21) can be inserted into the first mounting hole (41) along its axial direction.

2. The roller assembly according to claim 1, characterized in that: The drive shaft (21) comprises a first shaft section (211) and a second shaft section (212); the diameter of the second shaft section (212) is larger than the diameter of the first shaft section (211); the first mounting hole (41) is in the shape of a closed circular hole matched with the outer circumference of the second shaft section (212); and the second shaft section (212) is axially inserted into the first mounting hole (41).

3. The roller assembly according to claim 2, characterized in that: Along the axial direction of the roller (10), the gear assembly (50) and the impeller (20) are respectively arranged on opposite sides of the roller (10), and the opposite side walls of the housing (40) are respectively provided with the first mounting hole (41) and the second mounting hole (42) which are arranged through, and the second mounting hole (42) is in the shape of a circular hole adapted to the outer peripheral surface of the first shaft section (211), and the second mounting hole (42) has an opening.

4. The roller assembly according to claim 3, characterized in that: The drive shaft (21) further comprises a limiting portion (213) protruding from the outer peripheral surface of the first shaft section (211); the limiting portion (213) is an annular structure; the outer diameter of the limiting portion (213) is smaller than the diameter of the first mounting hole (41) and larger than the diameter of the second mounting hole (42).

5. The roller assembly according to claim 2, characterized in that: Along the axial direction of the roller (10), the gear assembly (50) and the impeller (20) are respectively arranged on opposite sides of the roller (10), and the opposite side walls of the housing (40) are each provided with a first mounting hole (41) penetrating therethrough, and the drive shaft (21) has two second shaft sections (212) arranged at intervals, and the two second shaft sections (212) are respectively rotatably arranged in the two first mounting holes (41).

6. The roller assembly according to any one of claims 1 to 5, characterized in that: The gear assembly (50) comprises a driving gear (51) and a driven gear assembly (52) which are meshed and connected, the driving gear (51) being coaxially arranged with the roller (10) and rotatably connected thereto, and the driven gear assembly (52) being drivingly connected to the impeller (20) via the driving shaft (21).

7. The roller assembly according to claim 6, characterized in that: The driven gear assembly (52) comprises a first driven gear (521) and a second driven gear (522); the second driven gear (522) has the same diameter as the driving gear (51); the first driven gear (521) is meshedly connected with the driving gear (51) and the second driven gear (522); the diameter of the driving gear (51) and the diameter of the second driven gear (522) are both smaller than the diameter of the first driven gear (521); the second driven gear (522) is coaxially arranged with the impeller (20) and is rotatably connected to the impeller via the driving shaft (21); and the diameter of the second driven gear (522) is smaller than the diameter of the first mounting hole (41).

8. The roller assembly according to claim 6, characterized in that: The driving gear (51) and the roller (10) are connected via a rotating shaft, and two ends of the rotating shaft are respectively connected to the rotation center of the driving gear (51) and the rotation center of the roller (10). The housing (40) also has a rotating hole (43) extending therethrough, and the rotating shaft is rotatably disposed in the rotating hole (43).

9. The roller assembly according to claim 7, characterized in that: The housing (40) also has a connecting shaft protruding toward the gear assembly (50); the rotation center of the first driven gear (521) has a connecting hole (523) penetrating therethrough; the first driven gear (521) is rotatably connected to the connecting shaft through the connecting hole (523).

10. A steering wheel, characterized in that: The steering wheel comprises a roller assembly (100) as claimed in any one of claims 1 to 9, and the steering wheel further comprises a PCB board (200), and the optical coupler (30) is mounted on the surface of the PCB board (200) via an SMT patch.

11. A vehicle, characterized in that: The vehicle comprises a steering wheel as claimed in claim 10 .

Images