Transmission gear structure and folding device for vehicle vision device

Abstract

The invention relates to the technical field of automobile parts, in particular to a transmission gear structure and a folding device for a vehicle vision device. The transmission gear structure comprises a gear body, and the inner ring face of the gear body is provided with a guide column in the radial direction or provided with a guide groove in the circumferential direction. The guide groove comprises a first horizontal section and an inclined section, and one end of the inclined section is smoothly connected with the first horizontal section. The folding device of the vehicle vision device comprises a shell, a mounting shaft, a driving unit, a transmission part mounted on the mounting shaft and a transmission gear structure rotationally mounted on the shell. A guide groove or a guide column is arranged on the outer wall of the transmission part, and the guide column is in sliding fit with the guide groove. The transmission gear structure and the folding device for the vehicle vision device are low in operation noise, small in axial size, low in starting load and long in service life.

Description

Technical Field

[0001] This application relates to the technical field of automotive parts, specifically to a transmission gear structure and a folding device for a vehicle vision device. Background Art

[0002] An electric folding device for an automotive exterior rearview mirror is usually rotatably installed between a mirror substrate and a mirror bracket fixed to a vehicle to achieve the folding function of the exterior rearview mirror. In order to reduce the frictional resistance between the mirror substrate and the mirror bracket during electric folding, it is often necessary to leave a certain gap between the mirror substrate and the mirror bracket when designing the rearview mirror. However, the problem is that the gap left will cause the lower end surface of the mirror bracket to lack the support of the mirror substrate. It is equivalent that the mirror bracket is completely supported by the folding mounting shaft and is pressed by a spring sleeved on the mounting shaft, and the anti-vibration ability is poor. During driving, especially when the driving speed is fast or the road surface is bumpy, it is very easy to shake. In addition, during high-speed driving, the gap left will generate strong wind noise.

[0003] In order to solve the above problems, for example, Chinese Patent No. CN108297798B discloses that during normal driving of a vehicle, since the exterior rearview mirror is generally in an open state, there is no gap between the mirror bracket and the mirror substrate at this time to prevent the exterior rearview mirror from shaking and generating wind noise; when it is necessary to fold the exterior rearview mirror (usually when parking or driving slowly on a narrow road), through the relative sliding between the cam assemblies, a millimeter-level gap is generated between the mirror bracket and the mirror substrate, thereby reducing the rotational resistance between the mirror bracket and the mirror substrate. And since the folding function is generally used in a parking or low-speed driving state, the gap generated at this time will not generate wind noise.

[0004] However, the above-mentioned existing technologies still have the following defects: (1) Since the cam assembly adopts multiple axially distributed components, under the driving action of the electric drive unit, axial clearances are generated between the components of the cam assembly due to the relative displacement of the cams. During this process, the large gear on the cam assembly will also generate axial displacement, resulting in relative movement between the large gear and the worm it meshes with, thus generating relatively large noise during the folding process. This is also one of the main reasons for the relatively large noise when folding the external rearview mirror of a vehicle at present. Moreover, since the large gear needs to generate displacement axially with respect to the worm, a larger margin (i.e., a larger axial dimension) needs to be reserved for the axial dimension of the large gear to ensure that the large gear can always mesh with the worm after axial displacement. At the same time, this axially distributed structure also occupies a relatively large axial space, resulting in a relatively large overall axial structure dimension, which is not conducive to the utilization of the internal space of the external rearview mirror of a vehicle; (2) Since the components of the cam assembly are pressed together by springs, during the startup process, when axial clearances are generated between the components of the cam assembly, the elastic force of the springs needs to be overcome, thus increasing the startup load of the electric drive unit. Also, since at the moment of startup, relative actions immediately start between the components of the cam assembly, further increasing the startup load of the electric drive unit. This high-load working condition at the moment of startup is not only likely to generate noise but also increases the wear between the components of the cam assembly, thus reducing its service life.

[0005] Therefore, how to improve the existing folding device of a vehicle vision device to overcome the above deficiencies is a technical problem that needs to be urgently solved by those skilled in the art. Summary of the Invention

[0006] An object of the present application is to provide a transmission gear structure with low running noise, small axial dimension, low startup load, and long service life, and a folding device for a vehicle vision device.

[0007] To achieve the above object, the technical solution adopted in the present application is: a transmission gear structure, including a gear body, wherein a guide post is provided along the radial direction on the inner ring surface of the gear body or a guide groove is provided along the circumferential direction; the guide groove includes a first horizontal section and an inclined section, and one end of the inclined section is smoothly connected to the first horizontal section.

[0008] Preferably, when the guide post is provided on the inner ring surface of the gear body, the inner ring surface of the gear body is provided with a mounting hole, and one end of the guide post is connected to the mounting hole through an elastic member.

[0009] Preferably, when the guide post is provided on the inner ring surface of the gear body, the gear body is formed by splicing at least two gear segments, and a clamping groove for clamping the guide post is provided between the gear segments.

[0010] Preferably, when the inner ring surface of the gear body is provided with the guide groove, the gear body is formed by splicing at least two gear segments, and when the gear segments are separated from each other, a notch for the guide post to enter is generated in the guide groove.

[0011] Preferably, one end of the gear body is provided with a locking protrusion or a locking groove.

[0012] Preferably, the guide groove further includes a second horizontal section, and one end of the second horizontal section is smoothly connected to the end of the inclined section that is far away from the first horizontal section.

[0013] On the other hand, the present application further provides a folding device for a vehicle vision device, including a transmission member, a transmission gear structure, a housing installed on a mirror bracket, a mounting shaft installed on a mirror substrate, and a driving unit installed on the housing; the transmission member is coaxially installed on the mounting shaft, a guide groove is provided circumferentially at a position corresponding to the guide post on the outer wall of the transmission member, or a guide post is provided radially at a position corresponding to the guide groove, and the guide post is slidably fitted in the guide groove; the gear body is rotatably installed in the housing, the gear body is coaxially sleeved outside the transmission member, and the gear body is engaged with the driving unit; when the guide post is slidably fitted in the first horizontal section, it is used to make the mirror bracket in the unfolded state; when the driving unit drives the gear body to rotate, so as to drive the guide post to slide from the first horizontal section to the inclined section and continue to slide, it is used to lift the transmission gear structure, the driving unit and the housing; when the guide post slides to the end of the inclined section and continues to be driven, it is used to make the mirror bracket perform a folding action.

[0014] Preferably, the guide groove further includes a second horizontal section, and one end of the second horizontal section is smoothly connected to the end of the inclined section that is far away from the first horizontal section; when the guide post slides from the inclined section to the end of the second horizontal section and continues to be driven, it is used to make the mirror bracket perform a folding action.

[0015] Preferably, a locking protrusion is provided at the upper end of the gear body, and a locking groove is provided on the outer wall of the transmission member; when the guide post slides to contact or before contacting the end of the second horizontal section, the locking protrusion is in contact and cooperation with the locking groove, so as to limit the relative rotation between the gear body and the transmission member.

[0016] Preferably, a driving member boss is provided at the upper end of the driving member; the folding device of the vehicle vision device further includes a positioning structure, and the positioning structure includes a positioning ring and a positioning elastic member; the positioning ring is slidably mounted up and down on the housing, and a positioning ring boss is provided at the lower end of the positioning ring; the positioning elastic member is disposed on the housing or the positioning ring and is used to make the driving member boss contact the positioning ring and / or is used to make the positioning ring boss contact the driving member; when the mirror bracket is reset to the unfolded state, the driving member boss just abuts against the positioning ring boss; a driving member inclined surface is provided between one side of the upper end of the driving member boss away from the positioning ring boss and the upper end surface of the driving member; a positioning ring inclined surface is provided between one side of the lower end of the positioning ring boss away from the driving member boss and the lower end surface of the positioning ring; when relative sliding occurs between the driving member inclined surface and the positioning ring inclined surface, it is used to make the positioning ring slide upward.

[0017] Preferably, a support block is provided on the housing, a support groove is provided on the outer wall of the driving member, and a locking groove is provided on the lower side of the inner wall of the support groove; when the mirror bracket is in the unfolded state, the support block is clamped in the locking groove to limit relative rotation between the driving member and the housing; when the housing is lifted to the upper limit, the support block is separated from the locking groove; when the mirror bracket performs a folding action, the support block is slidably connected to the support groove.

[0018] Preferably, guiding inclined surfaces are respectively provided on both sides of the support block and the locking groove, and the guiding inclined surfaces are used to enable relative sliding between the support block and the locking groove under the action of an external force.

[0019] Preferably, a locking protrusion is provided at the upper end of the gear body, and a locking groove is provided on the outer wall of the driving member; when the guide post slides to contact or before contacting the end of the inclined section, the locking protrusion is in contact and cooperation with the locking groove to limit relative rotation between the gear body and the driving member.

[0020] Preferably, the folding device of the vehicle vision device further includes an auxiliary elastic member, and the auxiliary elastic member is disposed between the driving member and the housing and is used to make the housing move upward relative to the driving member.

[0021] Preferably, a driving member stop portion is provided on the outside of the driving member, and a housing stop portion is provided on the housing; when the mirror bracket is in the unfolded state, the driving member stop portion cooperates with the housing stop portion to limit relative rotation between the driving member and the housing; when the housing is lifted to the upper limit, the housing stop portion is separated from the driving member stop portion to release the rotation restriction between the driving member and the housing.

[0022] Preferably, the folding device of the vehicle vision device further includes a mounting structure, which includes a base, a clamping elastic member, and a fastener. The base is disposed at the lower end of the mounting shaft, and the transmission member is sleeved on the mounting shaft. The fastener is slidably connected to the mounting shaft in the up and down direction, and the fastener can be fixed at any position on the mounting shaft. The clamping elastic member is located between the fastener and the transmission member and is used to press the transmission member against the base.

[0023] Preferably, a first card slot with a trapezoidal structure or a triangular structure is provided at the upper end of the base, and a first card block for adapting to the first card slot is provided at the lower end of the transmission member. When an external force causes the mirror bracket to rotate, relative sliding occurs between the first card block and the first card slot. A second card slot with a trapezoidal structure or a triangular structure is provided at the upper end of the base, and a second card block for adapting to the second card slot is provided on the housing. When an external force causes the mirror bracket to rotate, relative sliding occurs between the second card block and the second card slot.

[0024] Preferably, a jack for adapting to the base is provided on the mirror substrate, and a fixing portion is provided on the inner wall of the jack. The base is sleeved on the mounting shaft, and a receiving groove for adapting to the fixing portion is provided on the outer side of the lower end of the base. A limiting portion and an avoidance groove are provided at the lower end of the mounting shaft. When the avoidance groove coincides with the receiving groove, the limiting portion and the base are inserted into the jack, and the fixing portion is received in the receiving groove. When an external force first presses down the mounting shaft and then rotates the mounting shaft until the limiting portion moves below the fixing portion, after removing the external force, the clamping elastic member is used to clamp the limiting portion and the base to clamp the fixing portion.

[0025] Preferably, baffles extend downward from both sides of the fixing portion, and relative rotation between the limiting portion and the mirror substrate is restricted between the corresponding two baffles.

[0026] Compared with the prior art, the beneficial effects of the present application are as follows: (1) When the folding device of the vehicle vision device is in use, when the mirror bracket is in the unfolded state, the guide post is slidably connected to the first horizontal section of the guide groove. At this time, there is no gap between the mirror bracket and the mirror substrate, so that when the vehicle is driving normally, the mirror substrate can support the mirror bracket, prevent the external rearview mirror from shaking, and at the same time eliminate the gap between them, thereby reducing wind noise. When it is necessary to fold the external rearview mirror, the driving unit drives the gear body, thereby driving the gear body to rotate, and then driving the guide post to rotate. At this time, the guide post slides in the first horizontal section. At this time, the guide post does not generate a component force in the up and down direction on the first horizontal section. Coupled with the fact that the sliding part is generally lubricated by a lubricating medium, the resistance received by the guide post in the first horizontal section is very small, so the starting load is small, which is beneficial to reducing wear, extending the service life, and reducing noise at the same time.

[0027] When the guide post slides into the inclined section from the first horizontal section and continues to drive, the guide post generates a downward pressure on the inclined section in the up and down direction. At this time, since the transmission part, the mounting shaft, and the mirror substrate are equivalent to a whole and cannot move downward, therefore, according to the principle that the action of force is mutual, it is equivalent that the inclined section generates an upward reaction force on the guide post, thereby driving the transmission gear structure, the driving unit, the housing, and the mirror bracket to lift upward as a whole, so that a gap is first generated between the mirror bracket and the mirror substrate. During this process, since the transmission gear structure and the driving unit are a whole, that is, there is no relative displacement between the gear body and the driving unit along its axial direction, the transmission noise can be greatly reduced; at the same time, there is no need to reserve a larger margin for the axial dimension of the gear body, which is beneficial to reducing the axial dimension of the transmission gear structure. Description of the Drawings

[0028] Figure 1 Stereogram of a folding device for a vehicle vision device provided by the present application.

[0029] Figure 2 Provided by the present application Figure 1 Exploded view of the folding device of the vehicle vision device in

[0030] Figure 3 Provided by the present application Figure 2 Enlarged view of the gear body in

[0031] Figure 4 Provided by the present application Figure 2 Enlarged view of some structures in

[0032] Figure 5 Provided by the present application Figure 4 Exploded view of each structure in

[0033] Figure 6 Provided by the present application Figure 5 Exploded view of the transmission part in

[0034] Figure 7 Provided by the present application Figure 2 Enlarged view of some structures of the housing in

[0035] Figure 8 Provided by the present application Figure 7 Another perspective view of the housing body in

[0036] Figure 9 Provided by the present application Figure 1 Working state of the folding device of the vehicle vision device in Figure 1 .

[0037] Figure 10 Provided by the present applicationFigure 1 The working state of the folding device of the vehicle vision device Figure 2 。

[0038] Figure 11 Provided by this application Figure 10 The front view of each structure in

[0039] Figure 12 Provided by this application Figure 1 The working state of the folding device of the vehicle vision device Figure 3 。

[0040] Figure 13 The working state of the gear body and the drive unit provided by this application Figure 1 。

[0041] Figure 14 The working state of the gear body and the drive unit provided by this application Figure 2 。

[0042] Figure 15 Schematic diagram of the working principle of a positioning structure provided by this application.

[0043] Figure 16 Exploded view of another transmission part provided by this application

[0044] Figure 17 Stereogram of another positioning structure provided by this application

[0045] Figure 18 Provided by this application Figure 17 Another perspective view of the positioning structure in

[0046] Figure 19 Provided by this application Figure 18 Installation schematic diagram of the positioning structure in

[0047] Figure 20 Provided by this application Figure 6 Another perspective view of some transmission parts in

[0048] Figure 21 Provided by this application Figure 5 Another perspective view of the base in

[0049] Figure 22 The working state of the installation structure provided by this application Figure 1 。

[0050] Figure 23 The working state of the installation structure provided by this application Figure 2 。

[0051] Figure 24 The working state of the installation structure provided by this applicationFigure 3 。

[0052] Figure 25 A reference schematic diagram of the mirror substrate provided for this application.

[0053] In the figure: 1. Gear body; 11. Guide post; 12. Locking protrusion; 2. Transmission part; 20. Split transmission part; 21. Guide groove; 211. First horizontal section; 212. Inclined section; 213. Second horizontal section; 22. Locking groove; 23. Transmission part boss; 24. Transmission part inclined surface; 25. Transmission part stop; 26. Support groove; 27. Locking groove; 28. First clamping block; 29. Positioning card slot; 3. Positioning structure; 31. Positioning ring; 311. Positioning ring boss; 312. Positioning ring inclined surface; 313. Insert block; 32. Positioning elastic part; 321. Cylinder; 322. Buffer part; 33. Clamping arm; 34. Elastic arm; 4. Housing; 41. Housing body; 411. First step; 412. Second step; 42. Housing stop; 43. Support block; 431. Guide inclined surface; 44. Slot; 45. Second clamping block; 5. Mounting shaft; 51. Limiting part; 511. Screw through hole; 52. Avoidance groove; 53. Positioning block; 6. Mounting structure; 61. Base; 611. First card slot; 612. Second card slot; 613. Accommodation groove; 614. Positioning groove; 615. Screw mounting hole; 62. Clamping elastic part; 63. Fastener; 7. Driving unit; 71. Motor; 72. Transmission mechanism; 73. Transmission worm; 8. Auxiliary elastic part; 9. Lubrication structure; 100. Mirror substrate; 101. Jack; 102. Fixing part; 103. Baffle 103. Detailed implementation manners

[0054] Next, in combination with the detailed implementation manners, the present application will be further described. It should be noted that, on the premise of no conflict, any combination of the following-described embodiments or technical features can form a new embodiment.

[0055] In the description of the present application, it should be noted that for the orientation terms, such as the terms "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation and positional relationship are based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and should not be construed as limiting the specific protection scope of the present application. The terms "first", "second", etc. in the description and claims of the present application are used to distinguish similar objects and do not necessarily describe a specific order or sequence. The terms "comprising" and "having" in the description and claims of the present application and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device comprising a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0056] Embodiment 1 As Figures 1 to 2 shown, this embodiment provides a folding device for a vehicle vision device, including a transmission gear structure, a transmission member 2, a housing 4 installed on a mirror bracket, a mounting shaft 5 installed on a mirror substrate 100, and a driving unit 7 installed on the housing 4. As Figure 3 shown, the transmission gear structure includes a gear body 1. The inner ring surface of the gear body 1 is provided with guide posts 11 along the radial direction. The gear body 1 meshes with the driving unit 7 (as Figure 13 shown). As Figures 4 to 6 shown, the transmission member 2 is coaxially installed on the mounting shaft 5, and the gear body 1 is coaxially sleeved outside the transmission member 2 (as Figure 10 shown). At a position corresponding to the guide posts 11 on the outer wall of the transmission member 2, a guide groove 21 is provided along the circumferential direction; the guide groove 21 includes a first horizontal section 211 and an inclined section 212, and one end of the inclined section 212 is smoothly connected to the first horizontal section 211. The guide posts 11 are in sliding fit with the guide groove 21; when the guide posts 11 are in sliding fit with the first horizontal section 211, it is used to make the mirror bracket in the unfolded state; when the driving unit 7 drives the gear body 1 to rotate, thereby driving the guide posts 11 to slide from the first horizontal section 211 to the inclined section 212 and continue to slide, it is used to lift the transmission gear structure, the driving unit 7 and the housing 4; when the guide posts 11 slide to the end of the inclined section 212 and continue to be driven, it is used to make the mirror bracket perform a folding action. It should be understood that the positions of the guide posts 11 and the guide groove 21 can be interchanged, that is, the guide posts 11 are provided on the outer wall of the transmission member 2, and the guide groove 21 is provided on the inner ring surface of the gear body 1.

[0057] Working principle: When the folding device of the vehicle vision device is in use and the mirror bracket is in the unfolded state (i.e., the outside rearview mirror is normally opened), the guide post 11 is located in the first horizontal section 211 of the guide groove 21 (as Figure 9 shown). At this time, there is no gap between the mirror bracket and the mirror substrate 100, enabling the mirror substrate 100 to support the mirror bracket and prevent the outside rearview mirror from shaking; after eliminating the gap, wind noise can also be reduced. When it is necessary to fold the outside rearview mirror, the driving unit 7 drives the gear body 1, thereby driving the guide post 11 to rotate (taking Figure 13 as an example, the driving unit 7 drives the gear body 1 to rotate counterclockwise); at this time, the guide post 11 slides within the first horizontal section 211, and the guide post 11 does not generate a component force in the up and down directions. In addition, the relatively sliding parts will be lubricated by a lubricating medium, so the resistance received by the guide post 11 within the first horizontal section 211 is very small; therefore, at the moment when the driving unit 7 starts, only the gear body 1 is driven to rotate, and the starting load is small, which is beneficial to reducing wear, extending the service life, and reducing starting noise. As Figure 10 shown, when the guide post 11 slides from the first horizontal section 211 into the inclined section 212 and continues to be driven, the guide post 11 generates a downward pressure on the inclined section 212 in the up and down directions. At this time, since the transmission member 2, the mounting shaft 5, and the mirror substrate 100 are equivalent to a non-moving whole, therefore, according to the interaction of forces, it is equivalent to the inclined section 212 generating an upward reaction force on the guide post 11, thereby driving the overall structure composed of the gear body 1, the driving unit 7, the housing 4, and the mirror bracket to lift upward, so that a gap is generated between the mirror bracket and the mirror substrate 100. During this process, since the gear body 1 and the driving unit 7 are equivalent to a whole, that is, there is no relative displacement between the gear body 1 and the driving unit 7 along its axial direction, the noise between the driving unit 7 and the gear body 1 can be reduced, and there is no need to reserve extra margin for the axial dimension of the gear body 1, which is beneficial to reducing the axial dimension of the transmission gear structure; in addition, the interaction force between the guide post 11 and the inclined section 212 only needs to overcome the gravity of the gear body 1, the housing 4, the driving unit 7, and the mirror bracket, etc., and does not need to overcome the elastic force of the spring as in the prior art, further reducing the starting load of the driving unit 7. As Figures 11 to 12 shown, when the guide post 11 slides to the end of the inclined section 212 (i.e., the end of the inclined section 212 far from the first horizontal section 211), the gear body 1, the housing 4, the driving unit 7, and the mirror bracket are lifted to the upper limit (i.e., the gap between the mirror bracket and the mirror substrate 100 reaches the maximum). At this time, since the transmission member 2 cannot be pushed by the guide post 11, that is, the transmission member 2 blocks the gear body 1 from continuing to rotate, but the driving unit 7 is still driving. According to relative motion, the overall structure composed of the driving unit 7, the housing 4, and the mirror bracket will rotate clockwise around the gear body 1 (as Figure 14As shown, the folding of the mirror bracket (i.e., the exterior rearview mirror) is achieved. When the drive unit 7 starts in reverse, the unfolding of the exterior rearview mirror can be realized.

[0058] Due to the limited internal space of the exterior rearview mirror, that is, the size of the guide post 11 cannot be designed to be very large, and the guide post 11 and the gear body 1 are generally injection molded parts; also, since during the folding process of the exterior rearview mirror, the power transmission between the guide post 11 and the inclined section 212 all acts on the guide post 11, therefore, the load on the guide post 11 is large, and it is prone to breakage after a long time. To solve this problem, in this embodiment, as Figure 3 shown, a locking protrusion 12 is provided at the upper end of the gear body 1; as Figure 6 shown, a locking groove 22 is provided on the outer wall of the transmission member 2; as Figure 10 shown, when the guide post 11 slides to contact or before contacting the end of the inclined section 212, the locking protrusion 12 and the locking groove 22 are in contact and cooperate to limit the relative rotation between the gear body 1 and the transmission member 2; at this time, the locking protrusion 12 and the locking groove 22 can partially or completely offset the force on the guide post 11, thereby reducing the load on the guide post 11 and avoiding the breakage of the guide post 11. As Figure 9 shown, when the guide post 11 slides within the first horizontal section 211, there is no contact action between the locking protrusion 12 and the locking groove 22. It can be understood that the positions of the locking protrusion 12 and the locking groove 22 can be interchanged.

[0059] It should be understood that since the actual movement trajectory of the locking protrusion 12 is actually a spiral upward during the lifting process, therefore, taking the trapezoidal locking protrusion 12 and the locking groove 22 as an example, the size of the locking groove 22 needs to be slightly larger than the size of the locking protrusion 12, so that when the locking protrusion 12 and the locking groove 22 interact, there is still a certain margin space between the locking protrusion 12 and the locking groove 22 (as Figure 11 shown). Under the action of this margin space, when the exterior rearview mirror is unfolded from the folded state, that is, when the drive unit 7 drives the gear body 1 to rotate in the reverse direction, the locking protrusion 12 and the locking groove 22 will not immediately achieve reverse cooperation. It is necessary to wait for the gear body 1 to drive a certain angle and offset the margin space before the locking protrusion 12 and the locking groove 22 can achieve reverse contact and cooperation. At this time, the exterior rearview mirror will perform the unfolding action. Therefore, under the action of this margin space, it can also reduce the reverse start-up load when the drive unit 7 drives the exterior rearview mirror to unfold, thereby reducing the start-up noise and wear and extending the service life.

[0060] This application does not limit the specific structures of the locking protrusion 12 and the locking groove 22. The locking protrusion 12 is preferably a convex block structure with a trapezoidal or triangular structure, and the locking groove 22 is preferably a groove structure with a trapezoidal or triangular structure.

[0061] It should be understood that the number of the guide posts 11 and the guide grooves 21 in the present application is not limited. However, in order to improve the uniformity of force, the number of the guide posts 11 and the guide grooves 21 can both be set to multiple, and the multiple guide posts 11 and the multiple guide grooves 21 are both arranged at equal intervals along the circumferential direction of the mounting shaft 5.

[0062] In this embodiment, as Figure 2 shown, the housing 4 is formed by splicing and fixing at least two housing bodies 41 to each other, and a limiting area for limiting the gear body 1 is adapted to be formed between at least two housing bodies 41 (as Figure 9 shown); through the clamping action between at least two housing bodies 41, it is convenient to install the gear body 1 and ensure that the gear body 1 can only rotate relative to the housing 4. It should be understood that the specific structures of the housing 4 and the housing body 41 in the present application are not limited and can be adjusted and designed according to actual needs.

[0063] In this embodiment, as Figure 2 and Figure 9 shown, a lubricating structure 9 is provided between at least one end face of the gear body 1 and the housing 4. By providing the lubricating structure 9, the rotational resistance between the gear body 1 and the housing 4 can be reduced. The specific structure of the lubricating structure 9 in the present application is not limited. For example, it can be a lubricating ring, a bearing, a ball, etc., or an oil storage groove provided on the relatively rotating surface.

[0064] It should be understood that the present application does not limit the positioning method for the external rearview mirror to reach the unfolded position, and only two reference examples are provided below.

[0065] Example 1: As Figure 15 shown, a positioning card slot 29 is provided on the outer side of the upper end of the transmission member 2; the folding device of the vehicle vision device further includes a positioning structure 3, and the positioning structure 3 includes a clamping arm 33 rotatably connected to the housing 4. An elastic arm 34 is integrally formed on the clamping arm 33, and the elastic arm 34 abuts against the inner wall of the housing 4, so that the clamping arm 33 rotates to abut against the outer wall of the transmission member 2; when the external rearview mirror rotates from the folded position to the unfolded position, the clamping arm 33 just abuts against the positioning card slot 29, thereby restricting the relative rotation between the housing 4 and the transmission member 2 from continuing. Taking Figure 15 as an example, the external rearview mirror is in the unfolded position. At this time, the housing 4 and the mirror bracket cannot rotate counterclockwise around the transmission member 2 anymore; however, when the external rearview mirror is caused by external collision or manual folding and other factors to have a disorder in its internal cooperation, at this time, the cooperation between the clamping arm 33 and the positioning card slot 29 allows the mirror bracket and the housing 4 to rotate 360 degrees clockwise around the transmission member 2 for reverse adjustment until the folding device inside the external rearview mirror resumes use, and its principle is similar to that of a ratchet mechanism.

[0066] Example 2: As Figures 16 to 19As shown in the figure, a transmission part boss 23 is provided at the upper end of the transmission part 2; the folding device of the vehicle vision device further includes a positioning structure 3, and the positioning structure 3 includes a positioning ring 31 and a positioning elastic member 32; the positioning ring 31 is slidably mounted up and down on the housing 4, and a positioning ring boss 311 is provided at the lower end of the positioning ring 31; the positioning elastic member 32 is arranged on the housing 4 or the positioning ring 31, and is used to make the transmission part boss 23 contact the lower end surface of the positioning ring 31 or to make the positioning ring boss 311 contact the upper end surface of the transmission part 2; when the mirror bracket rotates to the unfolded state, the transmission part boss 23 just abuts against the positioning ring boss 311, thereby restricting the continued relative rotation between the positioning ring 31 (i.e., the housing 4) and the transmission part 2. A transmission part inclined surface 24 is provided between one side of the upper end of the transmission part boss 23 far from the positioning ring boss 311 and the upper end surface of the transmission part 2; a positioning ring inclined surface 312 is provided between one side of the lower end of the positioning ring boss 311 far from the transmission part boss 23 and the lower end surface of the positioning ring 31; when relative sliding occurs between the transmission part inclined surface 24 and the positioning ring inclined surface 312, it is used to make the positioning ring 31 slide upward, so that the positioning ring boss 311 straddles the transmission part boss 23, thereby realizing 360-degree reverse rotation adjustment. Among them, the positioning ring 31 is a ring structure, and the ring structure is convenient for reasonably avoiding structures such as the mounting shaft 5. The number of the positioning ring bosses 311 is at least two, preferably three, and the respective positioning ring bosses 311 are arranged at equal intervals along the circumferential direction of the positioning ring 31; the number and positions of the transmission part bosses 23 match those of the positioning ring bosses 311; when set to multiple, the force is more uniform, avoiding unilateral force. The positioning elastic member 32 is an elastic sheet structure, and one end of the elastic sheet structure is integrally formed on the positioning ring 31, and an acute angle structure is formed between the elastic sheet structure and the upper end surface of the positioning ring 31; this integral structure of the positioning elastic member 32 and the positioning ring 31 is simpler and more convenient to install. The elastic sheet structure and the positioning ring 31 are integrally injection-molded, with lower costs. A cylinder 321 protrudes from the end of the elastic sheet structure far from the positioning ring 31, and the cylinder 321 is used to reduce the relative sliding resistance between it and the housing 4. The number of the elastic sheet structures is at least two, and the respective elastic sheet structures are arranged at equal intervals along the circumferential direction of the positioning ring 31; increasing the number of the elastic sheet structures can not only increase the elastic force, but also improve the uniformity of the elastic force action, avoiding unilateral force. A buffer portion 322 for preventing the elastic sheet structure from breaking is formed between the elastic sheet structure and the positioning ring 31; due to the integral molding between the elastic sheet structure and the positioning ring 31, the buffer portion 322 can prevent the elastic sheet structure and the positioning ring 31 from breaking due to stress concentration. The buffer portion 322 can be such that the thickness at the junction between the elastic sheet structure and the positioning ring 31 gradually becomes smaller towards the middle, and at the same time, a rounded corner transition is formed between the elastic sheet structure and the positioning ring 31. In order to facilitate the sliding installation between the positioning ring 31 and the housing 4, an insertion block 313 is provided at the upper end of the positioning ring 31, such as Figure 19As shown, a slot 44 is provided on the housing 4, and the insertion block 313 is slidably connected to the slot 44 in the up and down direction. The number of the insertion blocks 313 is preferably at least two, and the insertion blocks 313 are arranged at equal intervals along the circumferential direction of the positioning ring 31; preferably, the insertion blocks 313 and the elastic sheet-like structures are arranged alternately.

[0067] In this embodiment, as Figure 16 shown, the guide groove 21 further includes a second horizontal section 213, and one end of the second horizontal section 213 is smoothly connected to the end of the inclined section 212 away from the first horizontal section 211. When the guide post 11 slides to the end of the inclined section 212, without the action of the locking protrusion 12 and the locking groove 22, it is necessary to wait until the guide post 11 slides to the end of the second horizontal section 213 (i.e., the end of the second horizontal section 213 away from the inclined section 212) and continues to be driven to make the mirror bracket perform the folding action; if the locking protrusion 12 and the locking groove 22 are provided, it is necessary to ensure that when the guide post 11 slides to or before contacting the end of the second horizontal section 213, the locking protrusion 12 and the locking groove 22 are in contact and cooperate to partially or completely offset the force on the guide post 11. When the external mirror moves from the folded state to the unfolded state, the driving unit 7 drives in the reverse direction. At the moment of reverse start, since the guide post 11 first slides in the second horizontal section 213, the sliding resistance of the guide post 11 is also very small, that is, the load on the driving unit 7 at the moment of start is relatively small.

[0068] It can be understood that the specific structure of the driving unit 7 is the prior art. For example, the driving unit 7 includes a motor 71, a transmission mechanism 72, and a transmission worm 73. The transmission worm 73 is rotatably installed on the housing 4, and the transmission worm 73 meshes with the gear body 1; the motor 71 is installed on the housing 4, and the output shaft of the motor 71 drives the worm to rotate through the transmission mechanism 72; the transmission mechanism 72 is preferably a worm and worm gear mechanism.

[0069] This application does not limit the way to realize the sliding fit of the guide post 11 into the guide groove 21. The following only provides a reference example: Example A, as Figure 6 shown, when the guide post 11 is located on the inner ring surface of the gear body 1, the transmission member 2 is formed by splicing at least two transmission member parts 20; when the transmission member parts 20 are separated, it is used to sleeved the gear body 1 outside the transmission member 2 and make a notch for the guide post 11 to enter in the guide groove 21. Through this split-type transmission member 2, the assembly between the transmission member 2 and the gear body 1 can be realized.

[0070] Example B: When the guide post 11 is located on the inner ring surface of the gear body 1, the inner ring surface of the gear body 1 is provided with a mounting hole. One end of the guide post 11 is connected to the mounting hole through an elastic member, so that the other end of the guide post 11 can be completely pressed into the mounting hole. Then, during assembly, only the guide post 11 needs to be pressed into the mounting hole first. After the gear body 1 is sleeved outside the transmission member 2 and the guide post 11 is aligned with the guide groove 21, the elastic member can push the guide post 11 into the guide groove 21. Among them, the elastic member can be a spring or other elastic structures.

[0071] Example C: When the inner ring surface of the gear body 1 is provided with a guide post 11, the gear body 1 is formed by splicing at least two gear segments, and a clamping groove for clamping the guide post 11 is provided between the gear segments. Then, during assembly, the guide post 11 can be inserted into the guide groove 21 first, and then the gear segments are combined to form the gear body 1. At this time, the clamping groove between the gear segments can just clamp the guide post 11, so as to realize the connection between the guide post 11 and the gear body 1.

[0072] Example D: When the inner ring surface of the gear body 1 is provided with a guide groove 21 (that is, when the guide post 11 is located on the outer ring surface of the transmission member 2), the gear body 1 is formed by splicing at least two gear segments, and when the gear segments are separated, a notch for the guide post 11 to enter is generated in the guide groove 21. Then, during assembly, the gear segments can be separated from each other to generate a notch in the guide groove 21. After the guide post 11 enters the guide groove 21 from the notch, the gear segments are combined to form the gear body 1.

[0073] Embodiment 2 The difference between this embodiment and other embodiments is that the folding device of the vehicle vision device further includes an auxiliary elastic member 8, and the auxiliary elastic member 8 is arranged between the transmission member 2 and the housing 4 and is used to move the housing 4 upward relative to the transmission member 2.

[0074] As Figure 10 shown, during the lifting process, that is, when the guide post 11 slides from the first horizontal section 211 into the inclined section 212 and continues to slide, the reaction force of the inclined section 212 on the guide post 11 drives the gear body 1, the driving unit 7, the housing 4 and the mirror bracket to lift upward. The lifting power depends entirely on the interaction between the guide post 11 and the inclined section 212, and the operating load of the driving unit 7 is large; during the reverse reset process, that is, when the guide post 11 slides along the inclined section 212 towards the first horizontal section 211, it quickly descends under the action of the gravity of the gear body 1, the driving unit 7, the housing 4 and the mirror bracket (equivalent to the gravity of the entire exterior mirror), so there is a phenomenon that the mirror bracket directly impacts the mirror substrate 100. As Figure 11As shown, after the auxiliary elastic member 8 is provided, during the lifting process, that is, when the guide post 11 slides from the first horizontal section 211 into the inclined section 212 and continues to slide, the elastic force of the auxiliary elastic member 8 can assist in driving the housing 4 to rise, which is beneficial to reducing the operating load of the driving unit 7. During the reverse reset process, that is, when the guide post 11 slides along the inclined section 212 towards the first horizontal section 211, the housing 4 needs to compress the auxiliary elastic member 8 when descending, thereby playing a role in slowing down the descent of the housing 4 and preventing the mirror bracket from directly hitting the mirror substrate 100. In addition, the auxiliary elastic member 8 is also beneficial to eliminating the assembly gap, avoiding shaking between the internal structures of the folding device, and can also improve the running smoothness, avoiding running jamming caused by the existence of the assembly gap.

[0075] The present application does not limit the specific structure and installation method of the auxiliary elastic member 8. For example, it can be a spring or other elastic structure, preferably a wave spring, and is directly clamped between the housing 4 and the transmission member 2 through a step on the housing 4.

[0076] Embodiment III The difference between this embodiment and other embodiments is that, as Figures 4 to 6 , a transmission member stop portion 25 is provided on the outside of the transmission member 2, as Figures 7 to 8 , and a housing stop portion 42 is provided on the housing 4; as Figure 9 shown, when the mirror bracket is in the unfolded state (that is, the guide post 11 slides within the first horizontal section 211), the transmission member stop portion 25 cooperates with the housing stop portion 42 to limit the relative rotation between the transmission member 2 and the housing 4, so as to ensure that there is no relative rotation between the housing 4 (mirror bracket) and the transmission member 2 (mirror substrate 100) at the moment of startup, and also ensure the stability of the exterior mirror during normal driving. As Figure 10 shown, when the housing 4 is lifted to the upper limit, the housing stop portion 42 is separated from the transmission member stop portion 25 to release the rotation restriction between the transmission member 2 and the housing 4. At this time, the housing 4 can rotate relative to the transmission member 2, thereby realizing the folding of the housing 4 (mirror bracket).

[0077] It should be understood that the present application does not limit the shapes of the transmission part stop 25 and the housing stop 42. However, the transmission part stop 25 is preferably a trapezoidal or triangular groove structure, and the housing stop 42 is preferably a bump structure of a trapezoidal or triangular structure (of course, it can also be that the transmission part stop 25 is a bump structure of a trapezoidal or triangular structure, and the housing stop 42 is a groove structure of a trapezoidal or triangular structure), and the size of the bump structure is adapted to the size of the groove structure. Since both the trapezoid and the triangle have inclined surfaces, when the acting force is large enough, relative sliding can still occur between the inclined surfaces, thereby preventing damage caused by excessive external force; in addition, due to the existence of machining and assembly errors, it may also cause the housing 4 to rise to the upper limit, and the transmission part stop 25 and the housing stop 42 still have not been completely separated. At this time, under the action of the inclined surfaces of the bump structure and the groove structure, relative sliding can also occur to further lift the housing 4, thereby avoiding jamming during operation.

[0078] Embodiment 4 Before the outer rearview mirror performs the folding action, a gap is generated between the mirror bracket and the mirror substrate 100. At this time, the entire outer rearview mirror is only supported by the mounting shaft 5, resulting in poor support stability between the structures inside the mirror bracket.

[0079] To solve the above problems, the difference between this embodiment and other embodiments is that, as Figures 7 to 8 , a support block 43 is provided on the housing 4, as Figures 4 to 6 , a support groove 26 is provided on the outer wall of the transmission part 2, and a locking groove 27 is provided on the lower side of the inner wall of the support groove 26; as Figure 9 shown, when the mirror bracket is in the unfolded state, the support block 43 is clamped in the locking groove 27 to limit the relative rotation between the transmission part 2 and the housing 4, acting as the equivalent of the transmission part stop 25 and the housing stop 42. When cooperating with the transmission part stop 25 and the housing stop 42 at the same time, it can also share the acting force between the housing 4 and the transmission part 2, and can also increase the total contact area and reduce wear; as Figure 10 shown, when the housing 4 rises to the upper limit, the support block 43 is separated from the locking groove 27; as Figure 12 shown, when the mirror bracket performs the folding action, the support block 43 is slidably connected to the support groove 26. Therefore, when the gear body 1, the drive unit 7, the housing 4, and the mirror bracket are lifted and then the outer rearview mirror continues to be folded, the support block 43 on the housing 4 is slidably connected in the support groove 26, that is, the height between the housing 4 (mirror bracket) and the transmission part 2 (mirror substrate 100) does not change, so that the support stability between the housing 4 and the transmission part 2 can be better achieved. In the case of cooperating with the auxiliary elastic member 8, the auxiliary elastic member 8 can eliminate the gap between the support block 43 and the support groove 26, and can further improve the support stability and reduce the shaking.

[0080] It should be understood that if the support block 43 and the support groove 26 are not provided, the inner ring surface of the gear body 1 is rotationally fitted to the outer ring surface of the transmission member 2, and the sliding of the guide post 11 in the guide groove 21 can also play a positioning role. At this time, most of the internal force of the folding device acts between the gear body 1 and the transmission member 2, and the overall stability is poor. In the presence of machining and assembly errors, it may even cause the internal structure to shake. However, with the cooperation of the support block 43 and the support groove 26, the support stability of the internal structure of the folding device can be fully improved, and the shaking can be reduced.

[0081] In this embodiment, as Figure 10 shown, guiding inclined surfaces 431 are respectively and suitably provided on both sides of the support block 43 and the locking groove 27. The guiding inclined surfaces 431 are used to enable relative sliding between the support block 43 and the locking groove 27 under the action of an external force, so as to prevent jamming.

[0082] In this embodiment, the support groove 26 is preferably arranged around the transmission member 2 for one week, and the number of the locking grooves 27 is preferably three, and the three locking grooves 27 are arranged at equal intervals along the circumferential direction of the transmission member 2.

[0083] Embodiment Five The difference between this embodiment and other embodiments is that, as Figure 2 , Figure 4 and Figure 5 shown, the folding device of the vehicle vision device further includes a mounting structure 6. The mounting structure 6 includes a base 61, a clamping elastic member 62 and a fastener 63. The base 61 is arranged at the lower end of the mounting shaft 5, and the transmission member 2 is sleeved on the mounting shaft 5; the fastener 63 is slidably connected to the mounting shaft 5 in the up and down direction, and the fastener 63 can be fixed at any position on the mounting shaft 5; the clamping elastic member 62 is located between the fastener 63 and the transmission member 2 and is used to press the transmission member 2 against the base 61. Through the action of the clamping elastic member 62, it is convenient to easily mount the transmission member 2 on the mounting shaft 5; at the same time, the fastener 63 can be fixed at any position on the mounting shaft 5, so that the clamping force of the clamping elastic member 62 on the transmission member 2 can be changed by adjusting the position of the fastener 63 on the mounting shaft 5. In addition, this assembly method can also ensure relative rotation between the transmission member 2 and the mounting shaft 5 (mirror substrate 100) under a large external force, avoiding damage to the power folding function of the outer rearview mirror caused by collision or manual rotation. Among them, the fastener 63 can be mounted on the mounting shaft 5 by means of threaded connection or interference fit, etc., so as to be fixed at any position on the mounting shaft 5. The clamping elastic member 62 is preferably a helical spring and can be directly sleeved on the mounting shaft 5. In addition, this assembly method can directly press a plurality of split transmission members 20 together for the split transmission member 2, thus eliminating the need for fixing between the split transmission members 20.

[0084] In this embodiment, as Figure 5 shown, a first clamping groove 611 with a trapezoidal structure or a triangular structure is provided at the upper end of the base 61. As Figure 20 shown, a first clamping block 28 adapted to the first clamping groove 611 is provided at the lower end of the transmission member 2; when an external force causes the mirror bracket to rotate, relative sliding occurs between the first clamping block 28 and the first clamping groove 611; through the locking action between the first clamping block 28 and the first clamping groove 611, it can be ensured that no relative rotation occurs between the transmission member 2 and the mounting shaft 5 (mirror substrate 100), thereby maintaining the stability of the external rearview mirror during normal vehicle driving. However, when an external force acts on the external rearview mirror, the trapezoidal or triangular inclined surface between the first clamping groove 611 and the first clamping block 28 can slide relative to each other, so that the transmission member 2 is lifted and rotated relative to the base 61, thereby preventing damage.

[0085] In this embodiment, due to the limited dimensional space inside the external rearview mirror, in order to meet the strength requirements, it is impossible to directly design the size of the folding device to be large enough. In order to further share the acting force that forces the mirror bracket to rotate, as Figure 5 shown, a second clamping groove 612 with a trapezoidal structure or a triangular structure is provided at the upper end of the base 61. As Figure 8 shown, a second clamping block 45 adapted to the second clamping groove 612 is provided on the housing 4; when an external force causes the mirror bracket to rotate, relative sliding occurs between the second clamping block 45 and the second clamping groove 612. In addition, since the base 61 is installed on the mirror substrate 100, the height position of the base 61 remains fixed. The relative sliding generated between the second clamping block 45 and the second clamping groove 612 will actually drive the housing 4 (mirror bracket) to lift upward, thereby ensuring that there is also a clearance effect between the mirror bracket and the mirror substrate 100 when the external rearview mirror is rotated by an external force, preventing wear between the mirror bracket and the mirror substrate 100.

[0086] In this embodiment, as Figure 8 shown, for the convenience of processing, the second clamping block 45 is integrally formed on the housing 4, and the support block 43 is integrally extended from the second clamping block 45; when an external force causes the mirror bracket to rotate, relative sliding occurs between the second clamping block 45 and the second clamping groove 612 and between the support block 43 and the locking groove 27 (as Figures 9 to 10 shown). The support block 43 and the second clamping block 45 can also be formed on the housing 4 independently of each other. It can be understood that the asymmetric arrangement can ensure that there is only one matching position between the components of the folding device, that is, when the internal structure is disordered due to external force, this asymmetric arrangement is beneficial to quickly restore the matching relationship during reverse rotation.

[0087] In this embodiment, as Figure 2 and Figure 8As shown, the housing 4 is formed by splicing and fixing at least two housing bodies 41 to each other. A ring-shaped first step 411 and a ring-shaped second step 412 are provided on one of the housing bodies 41. The first step 411 is located above the second step 412, and the inner diameter of the first step 411 is smaller than that of the second step 412. The lower side of the first step 411 is used to form the housing stop portion 42, and the lower side of the second step 412 is used to form the support block 43 and / or the second clamping block 45.

[0088] In this embodiment, in order to achieve the quick installation and disassembly between the mounting shaft 5 and the mirror substrate 100, as Figure 25 shown, a jack 101 for fitting the base 61 is provided on the mirror substrate 100, and a fixing portion 102 is provided on the inner wall of the jack 101. As Figure 5 shown, the base 61 is sleeved on the mounting shaft 5, and a receiving groove 613 for fitting the fixing portion 102 is provided on the outer side of the lower end of the base 61. A limiting portion 51 and an avoidance groove 52 are provided at the lower end of the mounting shaft 5. As Figure 22 shown, when the avoidance groove 52 coincides with the receiving groove 613, the limiting portion 51 and the base 61 can be inserted into the jack 101, and the fixing portion 102 is received in the receiving groove 613. As Figure 23 shown, when an external force first presses down the mounting shaft 5 and then rotates the mounting shaft 5, the limiting portion 51 can be moved to below the fixing portion 102 (i.e., the receiving groove 613). After removing the external force, as Figure 24 shown, under the action of the clamping elastic member 62, the distance between the limiting portion 51 and the base 61 becomes smaller, so that the limiting portion 51 and the base 61 clamp the fixing portion 102, and the installation between the mounting shaft 5 and the mirror substrate 100 can be completed. Conversely, when the mounting shaft 5 is first pressed down and then rotated, the disassembly between the mounting shaft 5 and the mirror substrate 100 can be realized.

[0089] In this embodiment, in order to improve the uniformity of force, as Figure 5 and Figure 25 shown, the number of the receiving groove 613, the limiting portion 51, the avoidance groove 52, and the fixing portion 102 are all preferably set to be multiple, and four in this embodiment.

[0090] In this embodiment, as Figure 25 shown, baffles 103 extend downward from both sides of the fixing portion 102, and the relative rotation between the limiting portion 51 and the mirror substrate 100 is restricted between the corresponding two baffles 103. Under the limitation of the baffles 103, the deviation of the limiting portion 51 from the fixing portion 102 can be avoided, thereby improving the assembly stability between them.

[0091] In this embodiment, since the base 61 is located inside the jack 101 during the process of assembling and installing the mounting shaft 5, the assembly position cannot be directly observed. To improve the assembly accuracy and operation convenience, as Figure 5 shown, a positioning block 53 is provided between the mounting shaft 5 and the limiting portion 51. As Figure 21 shown, a positioning groove 614 is provided between the lower side surface of the base 61 and the inner ring surface; when relative rotation occurs between the mounting shaft 5 and the base 61, the positioning block 53 is slidably engaged with the positioning groove 614; the rotation of the positioning block 53 is limited by the positioning groove 614, so that the positioning block 53 can only rotate within the area of the positioning groove 614, so that when the positioning block 53 rotates from one side of the positioning groove 614 to the other side, accurate assembly of the limiting portion 51 can be achieved.

[0092] In this embodiment, installation can also be carried out in cooperation with screws to provide multiple installation methods. For example, screw mounting holes 615 are provided on the lower side surface of the base 61, and screw through holes 511 are provided through the corresponding positions of the limiting portion 51 for the screw mounting holes 615.

[0093] It should be understood that each of the above embodiments can be implemented independently or in any combination. In addition, the above transmission gear structure, transmission member 2, installation structure 6, etc. can also be implemented independently or in any combination, so as to be used for the supply of parts of the folding device of the vehicle vision device.

[0094] The basic principle, main features and advantages of the present application have been described above. Those skilled in the art should understand that the present application is not limited by the above embodiments. What is described in the above embodiments and the specification is only the principle of the present application. Without departing from the spirit and scope of the present application, the present application will have various changes and improvements, and these changes and improvements all fall within the scope of the present application claimed.

Claims

1. Transmission gear structure, including a gear body, characterized in that, The inner ring surface of the gear body is provided with guide posts radially or guide grooves circumferentially; the guide groove includes a first horizontal section and an inclined section, and one end of the inclined section is smoothly connected to the first horizontal section.

2. The transmission gear structure according to claim 1, wherein, When the inner ring surface of the gear body is provided with the guide posts, the inner ring surface of the gear body is provided with mounting holes, and one end of each guide post is connected to the mounting hole through an elastic member; Or, when the inner ring surface of the gear body is provided with the guide posts, the gear body is formed by splicing at least two gear segments, and a clamping groove for clamping the guide posts is provided between the gear segments; Or, when the inner ring surface of the gear body is provided with the guide grooves, the gear body is formed by splicing at least two gear segments, and when the gear segments are separated, a notch for the guide posts to enter is generated in the guide groove.

3. The transmission gear structure according to claim 1 or 2, characterized in that, One end of the gear body is provided with a locking protrusion or a locking groove; And / or, the guide groove further includes a second horizontal section, and one end of the second horizontal section is smoothly connected to the end of the inclined section away from the first horizontal section.

4. Folding device for a vehicle vision device, comprising a housing mounted on a mirror bracket, a mounting shaft mounted on a mirror substrate, and a drive unit mounted on the housing, characterized in that, The folding device of the vehicle vision device further includes a transmission member and the transmission gear structure according to claim 1 or 2; The transmission member is coaxially mounted on the mounting shaft, and a guide groove is provided circumferentially at a position corresponding to the guide posts on the outer wall of the transmission member, or a guide post is provided radially at a position corresponding to the guide groove, and the guide post is in sliding fit with the guide groove; The gear body is rotatably mounted on the housing, the gear body is coaxially sleeved outside the transmission member, and the gear body meshes with the driving unit; When the guide post is in sliding fit with the first horizontal section, it is used to keep the mirror bracket in the unfolded state; when the driving unit drives the gear body to rotate, thereby driving the guide post to slide from the first horizontal section to the inclined section and continue to slide, it is used to lift the transmission gear structure, the driving unit, the housing and the mirror bracket upward; when the guide post slides to the end of the inclined section and continues to be driven, it is used to fold the mirror bracket.

5. The folding device of the vehicle vision device according to claim 4, characterized in that, The guide groove further includes a second horizontal section, and one end of the second horizontal section is smoothly connected to the end of the inclined section away from the first horizontal section; when the guide post slides from the inclined section to the end of the second horizontal section and continues to be driven, it is used to fold the mirror bracket.

6. The folding device of the vehicle vision device according to claim 5, characterized in that, A locking protrusion is provided at the upper end of the gear body, and a locking groove is provided on the outer wall of the transmission member; when the guide post slides to contact or before contacting the end of the second horizontal section, the locking protrusion is in contact fit with the locking groove to limit relative rotation between the gear body and the transmission member.

7. The folding device of the vehicle vision device according to claim 4, characterized in that, The upper end of the transmission member is provided with a transmission member boss; the folding device of the vehicle vision device further includes a positioning structure, and the positioning structure includes a positioning ring and a positioning elastic member; the positioning ring is slidably mounted on the housing up and down, and the lower end of the positioning ring is provided with a positioning ring boss; the positioning elastic member is arranged on the housing or the positioning ring and is used to make the transmission member boss contact with the positioning ring and / or is used to make the positioning ring boss contact with the transmission member; when the mirror bracket is reset to the unfolded state, the transmission member boss just abuts against the positioning ring boss; a transmission member inclined surface is provided between the side of the upper end of the transmission member boss away from the positioning ring boss and the upper end surface of the transmission member; a positioning ring inclined surface is provided between the side of the lower end of the positioning ring boss away from the transmission member boss and the lower end surface of the positioning ring; when relative sliding occurs between the transmission member inclined surface and the positioning ring inclined surface, it is used to make the positioning ring slide upward.

8. The folding device of the vehicle vision device according to claim 4, characterized in that, A support block is provided on the housing, a support groove is provided on the outer wall of the transmission member, and a locking groove is provided on the lower side of the inner wall of the support groove; when the mirror bracket is in the unfolded state, the support block is clamped in the locking groove to limit relative rotation between the transmission member and the housing; when the housing is lifted to the upper limit, the support block is separated from the locking groove; when the mirror bracket performs a folding action, the support block is slidably connected to the support groove.

9. The folding device of the vehicle vision device according to claim 8, characterized in that, Guide inclined surfaces are respectively provided on both sides of the support block and the locking groove, and the guide inclined surfaces are used to enable relative sliding between the support block and the locking groove under the action of an external force.

10. The folding device of the vehicle vision device according to claim 4, characterized in that, A locking protrusion is provided at the upper end of the gear body, and a locking groove is provided on the outer wall of the transmission member; when the guide post slides to contact or before contacting the end of the inclined section, the locking protrusion is in contact and cooperation with the locking groove to limit relative rotation between the gear body and the transmission member; and / or, the folding device of the vehicle vision device further includes an auxiliary elastic member, and the auxiliary elastic member is arranged between the transmission member and the housing and is used to make the housing move upward relative to the transmission member; and / or, a transmission member stop portion is provided on the outside of the transmission member, and a housing stop portion is provided on the housing; when the mirror bracket is in the unfolded state, the transmission member stop portion cooperates with the housing stop portion to limit relative rotation between the transmission member and the housing; when the housing is lifted to the upper limit, the housing stop portion is separated from the transmission member stop portion to release the rotation restriction between the transmission member and the housing.

11. The folding device of the vehicle vision device according to claim 4, characterized in that, The folding device of the vehicle vision device further includes a mounting structure, and the mounting structure includes a base, a clamping elastic member and a fastener. The base is arranged at the lower end of the mounting shaft, and the transmission member is sleeved on the mounting shaft; the fastener is slidably connected to the mounting shaft up and down, and the fastener can be fixed at any position on the mounting shaft; the clamping elastic member is located between the fastener and the transmission member and is used to press the transmission member against the base; The upper end of the base is provided with a first clamping groove having a trapezoidal structure or a triangular structure, and the lower end of the transmission member is provided with a first clamping block adapted to the first clamping groove; when an external force causes the mirror bracket to rotate, relative sliding occurs between the first clamping block and the first clamping groove; the upper end of the base is provided with a second clamping groove having a trapezoidal structure or a triangular structure, and the housing is provided with a second clamping block adapted to the second clamping groove; when an external force causes the mirror bracket to rotate, relative sliding occurs between the second clamping block and the second clamping groove.

12. The folding device of the vehicle vision device according to claim 11, characterized in that, The mirror substrate is provided with a jack adapted to the base, and a fixing portion is provided on the inner wall of the jack; the base is sleeved on the mounting shaft, and a receiving groove adapted to the fixing portion is provided on the outer side of the lower end of the base; the lower end of the mounting shaft is provided with a limiting portion and an avoidance groove; when the avoidance groove coincides with the receiving groove, the limiting portion and the base are inserted into the jack, and the fixing portion is received in the receiving groove; When an external force first presses down the mounting shaft and then rotates the mounting shaft until the limiting portion moves below the fixing portion, after removing the external force, the clamping elastic member is used to clamp the limiting portion and the base to clamp the fixing portion; Baffles extend downward from both sides of the fixing portion, and relative rotation between the limiting portion and the mirror substrate is restricted between the corresponding two baffles.

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