Transmission gear structure and folding device for a vision device of a vehicle

Abstract

The application relates to the technical field of automobile parts, in particular to a transmission gear structure and a folding device for a vehicle visual device. The transmission gear structure comprises a gear body, the inner ring surface of the gear body is provided with a guide column in the radial direction or is provided with a guide groove in the circumferential direction; the guide groove comprises a first horizontal section and an inclined section, and the inclined section is smoothly connected with the first horizontal section at one end. The folding device for the vehicle visual device comprises a shell, a mounting shaft, a driving unit, a transmission part mounted on the mounting shaft and a transmission gear structure rotatably 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 slidingly matched with the guide groove. The transmission gear structure and the folding device for the vehicle visual device have the advantages of low operation noise, small axial size, low starting load and long service life.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of automobile parts, in particular to a transmission gear structure and a folding device for a vehicle vision device. BACKGROUND

[0002] An electric folding device of an automobile outside rearview mirror is usually rotatably arranged between a mirror base plate and a mirror support fixed on a vehicle to realize the folding function of the outside rearview mirror. In order to reduce the frictional resistance between the mirror base plate and the mirror support during electric folding, a certain gap is usually reserved between the mirror base plate and the mirror support when the rearview mirror is designed. However, the problem is that the reserved gap will cause the lower end surface of the mirror support to lack the support of the mirror base plate, which means that the mirror support is completely supported by the folding installation shaft and is pressed by the spring fitted on the installation shaft, and the anti-shaking ability is poor. During driving, especially at high speed or on a bumpy road, the mirror support is prone to shaking. In addition, the reserved gap will produce strong wind noise during high-speed driving.

[0003] In order to solve the above problems, for example, the Chinese patent with the publication number CN108297798B discloses that during normal driving of the automobile, the outside rearview mirror is generally in an open state, and no gap is reserved between the mirror support and the mirror base plate to prevent the outside rearview mirror from shaking and producing wind noise. When the outside rearview mirror needs to be folded (usually when parking or driving at low speed on a narrow road), the relative sliding between the cam assemblies causes a millimeter-level gap between the mirror support and the mirror base plate, thereby reducing the rotational resistance between the mirror support and the mirror base plate. In addition, the gap will not produce wind noise because the folding function is usually used when the automobile is parked or driven at low speed.

[0004] However, the prior art still has the following defects: (1) Since the cam assembly adopts an axial distribution of multiple components, under the driving action of the electric drive unit, axial gaps are generated between the components of the cam assembly due to the relative displacement of the cam, and in this process, the large gear on the cam assembly also generates displacement along its axial direction, thereby causing relative movement between the large gear and the worm with which it meshes, which can generate a large noise during folding. This is one of the main reasons for the large noise generated during folding of the automobile outside rearview mirror. Moreover, since the large gear needs to generate displacement between the worm along its axial direction, a larger allowance (i.e. larger axial size) needs to be reserved for the axial size of the large gear to ensure that the large gear can always mesh with the worm after displacement along its axial direction. At the same time, this axial distribution structure also occupies a large axial space, thereby resulting in a large overall axial structure size, which is not conducive to the utilization of the internal space of the automobile outside rearview mirror; (2) Since the components of the cam assembly are pressed by springs, in the starting process, the spring force needs to be overcome during the generation of axial gaps between the components of the cam assembly, thereby increasing the starting load of the electric drive unit. Moreover, since the components of the cam assembly immediately start to generate relative action at the starting moment, the starting load of the electric drive unit is further increased. This high load working condition at the starting moment not only easily generates noise, but also increases the wear between the components of the cam assembly, thereby reducing the service life thereof.

[0005] Therefore, how to improve the folding device of the existing vehicle vision device to overcome the above-mentioned defects is a technical problem that needs to be solved by those skilled in the art. SUMMARY

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

[0007] To achieve the above object, the technical solution adopted by the present application is as follows: a transmission gear structure, comprising a gear body, an inner ring surface of the gear body is provided with a guide column or a guide groove is formed in the circumferential direction; the guide groove comprises a first horizontal section and an inclined section, and the inclined section is smoothly connected with the first horizontal section at one end.

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

[0009] Preferably, when the inner ring surface of the gear body is provided with the guide column, the gear body comprises at least two gear sub-bodies spliced together, and a clamping groove for clamping the guide column is arranged between each of the gear sub-bodies.

[0010] Preferably, when the inner ring surface of the gear body is provided with the guide slot, the gear body is formed by splicing at least two gear parts, and each of the gear parts is separated to form a gap for the guide column to enter.

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

[0012] Preferably, the guide slot further comprises a second horizontal section, one end of the second horizontal section being smoothly connected to the end of the inclined section away from the first horizontal section.

[0013] In another aspect, the application also provides a folding device of a vehicle vision device, comprising a transmission member, a transmission gear structure, a housing mounted on a mirror support, a mounting shaft mounted on a mirror base plate, and a driving unit mounted on the housing; the transmission member is coaxially mounted on the mounting shaft, a guide slot is arranged on the outer wall of the transmission member in the circumferential direction corresponding to the position of the guide column, or a guide column is arranged on the outer wall of the transmission member in the radial direction corresponding to the position of the guide slot, and the guide column is slidingly fitted in the guide slot; the gear body is rotationally mounted on the housing, the gear body is coaxially sleeved on the outside of the transmission member, and the gear body is engaged with the driving unit; when the guide column is slidingly fitted in the first horizontal section, the mirror support is in an unfolded state; when the driving unit drives the gear body to rotate, thereby driving the guide column to slide from the first horizontal section to the inclined section and continue to slide, the transmission gear structure, the driving unit and the housing are lifted; when the guide column slides to the end of the inclined section and continues to be driven, the mirror support performs a folding action.

[0014] Preferably, the guide slot further comprises a second horizontal section, one end of the second horizontal section being smoothly connected to the end of the inclined section away from the first horizontal section; when the guide column slides from the inclined section to the end of the second horizontal section and continues to be driven, the mirror support performs a folding action.

[0015] Preferably, the gear body is provided with a locking protrusion at the upper end, and the outer wall of the transmission member is provided with a locking groove; when the guide column slides to the end of the second horizontal section or before contacting the end of the second horizontal section, the locking protrusion and the locking groove are in contact and fit, for limiting the relative rotation between the gear body and the transmission member.

[0016] Preferably, the upper end of the transmission member is provided with a transmission member boss; the folding device of the vehicle vision device further comprises a positioning structure, the positioning structure comprising a positioning ring and a positioning elastic member; the positioning ring is slidingly installed on the housing, 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 for making the transmission member boss contact the positioning ring and / or making the positioning ring boss contact the transmission member; when the mirror support is reset to the unfolded state, the transmission member boss is just in abutment with the positioning ring boss; a transmission member inclined surface is arranged between the upper end of the transmission member and the side of the upper end of the transmission member boss away from the positioning ring boss; a positioning ring inclined surface is arranged between the lower end of the positioning ring boss away from the transmission member boss and the lower end of the positioning ring; when the transmission member inclined surface and the positioning ring inclined surface slide relative to each other, the positioning ring is made to slide upward.

[0017] Preferably, the housing is provided with a support block, the outer wall of the transmission member is provided with a support groove, and the inner wall of the support groove is provided with a locking groove on the lower side; when the mirror support is in the unfolded state, the support block is clamped in the locking groove, so as to limit the 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 support is folded, the support block is slidingly connected to the support groove.

[0018] Preferably, the support block and the two sides of the locking groove are both adapted to be provided with guide inclined surfaces, the guide inclined surfaces being used for enabling the support block and the locking groove to slide relative to each other under the action of an external force.

[0019] Preferably, the upper end of the gear body is provided with a locking protrusion, and the outer wall of the transmission member is provided with a locking groove; when the guide column slides to the end of the inclined section or before the end of the inclined section is contacted, the locking protrusion is in contact with the locking groove, so as to limit the relative rotation between the gear body and the transmission member.

[0020] Preferably, the folding device of the vehicle vision device further comprises an auxiliary elastic member, the auxiliary elastic member being arranged between the transmission member and the housing, and being used for making the housing move upward relative to the transmission member.

[0021] Preferably, the outer side of the transmission member is provided with a transmission member stop portion, and the housing is provided with a housing stop portion; when the mirror support is in the unfolded state, the transmission member stop portion is matched with the housing stop portion, so as to limit the 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, so as to release the rotation limitation between the transmission member and the housing.

[0022] Preferably, the folding device of the vehicle vision device further comprises a mounting structure, the mounting structure comprises 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, 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 for pressing the transmission member against the base.

[0023] Preferably, the upper end of the base is provided with a first clamping groove in trapezoidal or triangular structure, and the lower end of the transmission member is provided with a first clamping block for adapting to the first clamping groove; when an external force rotates the mirror support, the first clamping block and the first clamping groove slide relative to each other; the upper end of the base is provided with a second clamping groove in trapezoidal or triangular structure, and the shell is provided with a second clamping block for adapting to the second clamping groove; when an external force rotates the mirror support, the second clamping block and the second clamping groove slide relative to each other.

[0024] Preferably, the mirror base plate is provided with a jack for adapting to the base, and a fixed part is arranged on the inner wall of the jack; the base is sleeved on the mounting shaft, and the outer side of the lower end of the base is provided with a containing groove for adapting to the fixed part; the lower end of the mounting shaft is provided with a limiting part and an avoiding groove; when the avoiding groove coincides with the containing groove, the limiting part and the base are inserted into the jack, and the fixed part is contained in the containing groove; when an external force first presses downward on the mounting shaft and then rotates the mounting shaft until the limiting part moves below the fixed part, after the external force is removed, the clamping elastic member is used for clamping the limiting part, the base and the fixed part.

[0025] Preferably, the two sides of the fixed part extend downward to form a baffle, and the limiting part and the mirror base plate are limited from rotating relative to each other between the two baffles.

[0026] Compared with the prior art, the folding device of the vehicle vision device has the following beneficial effects: (1) when the mirror support is in the unfolded state, the guide column is slidably connected to the first horizontal section of the guide groove, at this time, there is no gap between the mirror support and the mirror base plate, so that the mirror base plate can support the mirror support when the vehicle is running normally, preventing the outside rearview mirror from shaking, and also eliminating the gap between them, thereby reducing wind noise. When it is necessary to fold the outside rearview mirror, the gear body is driven by the driving unit to rotate, thereby driving the guide column to rotate, at this time, the guide column slides in the first horizontal section, at this time, the guide column does not generate a force in the upward and downward directions on the first horizontal section, and the sliding part is generally lubricated by a lubricating medium, so that the resistance of the guide column in the first horizontal section is very small, so that the starting load is small, thereby reducing wear and tear, prolonging the service life, and also reducing noise.

[0027] (2) When the guide column slides into the inclined section from the first horizontal section and continues to be driven, the guide column generates downward pressure on the inclined section in the up-down direction. At this time, since the transmission member, the mounting shaft and the mirror substrate are equivalent to a whole and cannot move downward, according to the principle of action and reaction, the inclined section generates upward reaction force on the guide column, thereby driving the transmission gear structure, the driving unit, the shell and the mirror support to lift upward as a whole, so that a gap is first generated between the mirror support and the mirror substrate. In this process, since the transmission gear structure and the driving unit are a whole, i.e. the gear body does not generate relative displacement with the driving unit in the axial direction, transmission noise can be greatly reduced. At the same time, the axial dimension of the gear body does not need to reserve a larger allowance, thereby being beneficial to reducing the axial dimension of the transmission gear structure. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 A perspective view of a folding device of a vehicle vision device provided in the present application.

[0029] Figure 2 A perspective view of a folding device of a vehicle vision device provided in the present application. Figure 1 An exploded view of a folding device of a vehicle vision device provided in the present application.

[0030] Figure 3 An enlarged view of a gear body provided in the present application. Figure 2 An enlarged view of a gear body provided in the present application.

[0031] Figure 4 An enlarged view of a gear body provided in the present application. Figure 2 An enlarged view of a gear body provided in the present application.

[0032] Figure 5 An exploded view of a gear body provided in the present application. Figure 4 An exploded view of a gear body provided in the present application.

[0033] Figure 6 An exploded view of a gear body provided in the present application. Figure 5 An exploded view of a gear body provided in the present application.

[0034] Figure 7 An enlarged view of a part of a shell provided in the present application. Figure 2 An enlarged view of a part of a shell provided in the present application.

[0035] Figure 8 Another view of a shell body provided in the present application. Figure 7 Another view of a shell body provided in the present application.

[0036] Figure 9 A working state of a folding device of a vehicle vision device provided in the present application. Figure 1 A working state of a folding device of a vehicle vision device provided in the present application. Figure 1 .

[0037] Figure 10 A working state of a folding device of a vehicle vision device provided in the present application.Figure 1 Working state of folding device of vehicle vision device Figure 2 .

[0038] Figure 11 Working state of folding device of vehicle vision device Figure 10 Front view of each structure

[0039] Figure 12 Working state of folding device of vehicle vision device Figure 1 Front view of each structure Figure 3 .

[0040] Figure 13 Working state of gear body and driving unit provided for the present application Figure 1 .

[0041] Figure 2 Working state of gear body and driving unit provided for the present application Figure 15 .

[0042] Figure 16 Working principle diagram of a positioning structure provided for the present application

[0043] Figure 17 Exploded view of another transmission member provided for the present application

[0044] Figure 18 Perspective view of another positioning structure provided for the present application

[0045] Figure 17 Working state of folding device of vehicle vision device Figure 19 Another perspective view of the positioning structure

[0046] Figure 18 Working state of folding device of vehicle vision device Figure 20 Installation schematic diagram of the positioning structure

[0047] Figure 6 Working state of folding device of vehicle vision device Figure 21 Another perspective view of part of the transmission member

[0048] Figure 5 Working state of folding device of vehicle vision device Figure 22 Another perspective view of the base

[0049] Figure 1 Working state of mounting structure provided for the present application Figure 23 .

[0050] Figure 2 Working state of mounting structure provided for the present application Figure 24 .

[0051] Figure 3 Working state of mounting structure provided for the present applicationFigure 25 .

[0052] Figures 1-2 Reference schematic diagram of the mirror substrate provided in the present application.

[0053] In the figure: 1, gear body; 11, guide column; 12, locking protrusion; 2, transmission member; 20, transmission member split body; 21, guide groove; 211, first horizontal section; 212, inclined section; 213, second horizontal section; 22, locking groove; 23, transmission member boss; 24, transmission member bevel; 25, transmission member stop; 26, support groove; 27, locking groove; 28, first clamping block; 29, positioning clamping groove; 3, positioning structure; 31, positioning ring; 311, positioning ring boss; 312, positioning ring bevel; 313, insertion block; 32, positioning elastic member; 321, cylinder; 322, buffer; 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 bevel; 44, insertion slot; 45, second clamping block; 5, mounting shaft; 51, limiting portion; 511, screw through hole; 52, avoidance groove; 53, positioning block; 6, mounting structure; 61, base; 611, first clamping groove; 612, second clamping groove; 613, containing groove; 614, positioning groove; 615, screw mounting hole; 62, clamping elastic member; 63, fastener; 7, driving unit; 71, motor; 72, transmission mechanism; 73, transmission worm; 8, auxiliary elastic member; 9, lubrication structure; 100, mirror substrate; 101, insertion hole; 102, fixed portion; 103, baffle 103. DETAILED DESCRIPTION

[0054] Hereinafter, the present application will be further described in conjunction with specific embodiments. It should be noted that, under the premise of no conflict, the following described embodiments or technical features can be combined in any manner to form new embodiments.

[0055] In the description of the present application, it should be noted that for directional words, such as the terms "center", "transverse", "longitudinal", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating directions and positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operate in a specific direction, and cannot be understood as limiting the specific scope of protection 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 are not necessarily used to describe a specific order or sequence. The terms "including" and "having" in the description and claims of the present application and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units that are not explicitly listed or inherent to these processes, methods, products or devices.

[0056] Example 1

[0057] like Figure 3 As shown, this embodiment provides a folding device for a vehicle vision device, comprising a transmission gear structure, a transmission member 2, a housing 4 mounted on a mirror bracket, a mounting shaft 5 mounted on a mirror base plate 100, and a driving unit 7 mounted on the housing 4. Figure 13 As shown, the transmission gear structure includes a gear body 1, the inner ring surface of the gear body 1 is provided with a guide column 11 along the radial direction, and the gear body 1 is engaged with the driving unit 7 (as shown in FIG. Figures 4-6 As shown in the figure). Figure 10 As shown, the transmission member 2 is coaxially mounted on the mounting shaft 5, and the gear body 1 is coaxially sleeved on the outside of the transmission member 2 (as shown in FIG. Figure 9 As shown in FIG, a guide groove 21 is provided circumferentially on the outer wall of the transmission member 2 at a position corresponding to the guide post 11; the guide groove 21 includes a first horizontal section 211 and an inclined section 212, with one end of the inclined section 212 smoothly connected to the first horizontal section 211. The guide post 11 slides in the guide groove 21; when the guide post 11 slides in the first horizontal section 211, it is used to put the mirror holder in an unfolded state; when the drive unit 7 drives the gear body 1 to rotate, thereby driving the guide post 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 drive unit 7 and the housing 4; when the guide post 11 slides to the end of the inclined section 212 and continues to drive, it is used to cause the mirror holder to fold. It should be understood that the positions of the guide post 11 and the guide groove 21 can be interchanged, that is, the guide post 11 is provided on the outer wall of the transmission member 2, and the guide groove 21 is provided on the inner annular surface of the gear body 1.

[0058] Working principle: When the folding device of the vehicle vision device is in use, the mirror bracket is in the unfolded state (ie, the exterior rearview mirror is normally opened), the guide column 11 is located in the first horizontal section 211 of the guide groove 21 (such as Figure 13 As shown in the figure, there is no gap between the mirror bracket and the mirror base plate 100, so that the mirror base plate 100 supports the mirror bracket and prevents the exterior rearview mirror from shaking. After the gap is eliminated, wind noise can also be reduced. When the exterior rearview mirror needs to be folded, the gear body 1 is driven by the driving unit 7, thereby driving the guide column 11 to rotate (with Figure 10 For example, the drive unit 7 drives the gear body 1 to rotate counterclockwise); at this time, the guide column 11 slides in the first horizontal section 211, and the guide column 11 does not generate a component force in the up and down directions. In addition, the relative sliding parts are lubricated by the lubricating medium, so the resistance encountered by the guide column 11 in the first horizontal section 211 is very small; therefore, at the moment of starting, the drive unit 7 only drives the gear body 1 to rotate, and the starting load is small, which is conducive to reducing wear, extending service life, and reducing starting noise. Figures 11-12 As shown, when the guide column 11 slides from the first horizontal section 211 into the inclined section 212 and continues to drive, the guide column 11 generates downward pressure on the inclined section 212 along 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, according to the interaction of forces, the inclined section 212 generates an upward reaction force on the guide column 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, thereby generating a gap between the mirror bracket and the mirror substrate 100. During this process, since the gear body 1 and the drive unit 7 are equivalent to a whole, that is, there is no relative displacement between the gear body 1 and the drive unit 7 along its axial direction, the noise between the drive unit 7 and the gear body 1 is reduced, and the axial dimension of the gear body 1 does not need to reserve excess margin, which is conducive to reducing the axial dimension of the transmission gear structure; in addition, the interaction force between the guide column 11 and the inclined section 212 only needs to overcome the gravity of the gear body 1, the housing 4, the drive unit 7 and the mirror bracket, and does not need to overcome the elastic force of the spring as in the prior art, further reducing the starting load of the drive unit 7. Figure 14 As shown, when the guide post 11 slides to the end of the inclined section 212 (i.e., the end of the inclined section 212 away from the first horizontal section 211), the gear body 1, the housing 4, the drive 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, the transmission member 2 blocks the gear body 1 from continuing to rotate, but the drive unit 7 is still driving. According to the relative motion, the entire structure composed of the drive unit 7, the housing 4, and the mirror bracket rotates clockwise around the gear body 1 (as shown in FIG. 1 ). Figure 3When the driving unit 7 is reversely started, the folding of the mirror support (i.e. the outside rearview mirror) can be realized.

[0059] Due to the limited internal space of the outside rearview mirror, i.e. the size of the guide column 11 cannot be designed to be too large, and the guide column 11 and the gear body 1 are generally injection molded; and due to the fact that the power transmission between the guide column 11 and the inclined section 212 during the folding of the outside rearview mirror is entirely applied to the guide column 11, the guide column 11 is heavily loaded and is prone to breakage after a long time. In order to solve this problem, in the present embodiment, as shown in Figure 6 , the upper end of the gear body 1 is provided with a locking protrusion 12; as shown in Figure 10 , the outer wall of the transmission member 2 is provided with a locking groove 22; as shown in Figure 9 , when the guide column 11 slides to contact the end of the inclined section 212 or before the contact, the locking protrusion 12 and the locking groove 22 are in contact and cooperation, which is used 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 entirely offset the stress of the guide column 11, thereby reducing the load of the guide column 11 and avoiding the breakage of the guide column 11. As shown in Figure 11 , when the guide column 11 slides in the first horizontal section 211, the locking protrusion 12 and the locking groove 22 do not produce contact action. It can be understood that the positions of the locking protrusion 12 and the locking groove 22 can be interchanged.

[0060] It should be understood that due to the fact that the actual movement track of the locking protrusion 12 is actually a spiral upward during the lifting process, 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 residual space between the locking protrusion 12 and the locking groove 22 (as shown in Figure 2 , under the action of the residual space, when the outside rearview mirror is unfolded from the folding, i.e. when the driving unit 7 drives the gear body 1 to reversely rotate, the locking protrusion 12 and the locking groove 22 will not immediately realize the reverse cooperation, and need to wait for the gear body 1 to drive a certain angle, offset the residual space, and then make the locking protrusion 12 and the locking groove 22 realize the reverse contact cooperation, at this time the outside rearview mirror will perform the unfolding action, therefore, under the action of the residual space, the reverse starting load of the driving unit 7 when driving the outside rearview mirror to unfold can also be reduced, thereby reducing the starting noise and wear and prolonging the service life.

[0061] The present application does not limit the specific structure of the locking protrusion 12 and the locking groove 22, the locking protrusion 12 is preferably a protrusion structure with a trapezoidal or triangular structure, and the locking groove 22 is preferably a groove structure with a trapezoidal or triangular structure.

[0062] It should be understood that the present application does not limit the number of guide columns 11 and guide grooves 21, but in order to improve the uniformity of stress, the number of guide columns 11 and guide grooves 21 can be set to be multiple, and the multiple guide columns 11 and the multiple guide grooves 21 are arranged equidistantly along the circumference of the mounting shaft 5.

[0063] In the present embodiment, as shown in Figure 9 , the shell 4 comprises at least two shell bodies 41 which are spliced and fixed with each other, and a limiting area for limiting the gear body 1 is formed between the at least two shell bodies 41 (as shown in Figure 2 ); through the clamping action between the at least two shell bodies 41, the installation of the gear body 1 is facilitated, and it is ensured that the gear body 1 can only produce self-rotation relative to the shell 4. It should be understood that the present application does not limit the specific structure of the shell 4 and the shell body 41, which can be adjusted and designed according to actual needs.

[0064] In the present embodiment, as shown in Figure 9 and Figure 15 , a lubricating structure 9 is arranged between at least one end surface of the gear body 1 and the shell 4. Through the arrangement of the lubricating structure 9, the rotation resistance between the gear body 1 and the shell 4 can be reduced. The present application does not limit the specific structure of the lubricating structure 9, which can be a lubricating ring, a bearing, a ball, or an oil storage groove arranged on the relative rotation surface.

[0065] It should be understood that the present application does not limit the positioning mode of the external rearview mirror to the unfolded position, and only two reference examples are provided below.

[0066] Example one: as shown in Figure 15 , a positioning clamping groove 29 is arranged on the upper end outer side of the transmission member 2; the folding device of the vehicle vision device further comprises a positioning structure 3, the positioning structure 3 comprises a clamping arm 33 which is rotationally connected to the shell 4, the clamping arm 33 integrally forms an elastic arm 34 thereon, and the elastic arm 34 abuts against the inner wall of the shell 4, so that the clamping arm 33 is rotated to abut against the outer wall of the transmission member 2; when the external rearview mirror is rotated from the folded position to the unfolded position, the clamping arm 33 abuts against the positioning clamping groove 29, so as to limit the continuous relative rotation between the shell 4 and the transmission member 2. Taking Figures 16-19 for example, the external rearview mirror is in the unfolded position, at this time, the shell 4 and the mirror support cannot continue to rotate counterclockwise around the transmission member 2; however, when the internal cooperation of the external rearview mirror is disordered due to external collision or artificial folding and other factors, at this time, the cooperation of the clamping arm 33 and the positioning clamping groove 29 can allow the mirror support and the shell 4 to rotate clockwise by 360 degrees in the reverse direction around the transmission member 2, until the folding device inside the external rearview mirror is restored for use, and the principle is similar to that of a ratchet mechanism.

[0067] Example two: as shown in Figure 19As shown, the upper end of the transmission member 2 is provided with a transmission member boss 23; the folding device of the vehicle vision device further comprises a positioning structure 3, the positioning structure 3 comprises a positioning ring 31 and a positioning elastic member 32; the positioning ring 31 is slidably installed on the housing 4 in an up-down direction, and the lower end of the positioning ring 31 is provided with a positioning ring boss 311; the positioning elastic member 32 is arranged on the housing 4 or the positioning ring 31, and is used to make the transmission member 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 member 2; when the mirror support is rotated to the unfolded state, the transmission member boss 23 just abuts against the positioning ring boss 311, thereby limiting the continued relative rotation between the positioning ring 31 (i.e. the housing 4) and the transmission member 2. The side of the upper end of the transmission member boss 23 away from the positioning ring boss 311 is provided with a transmission member inclined surface 24, and the side of the lower end of the positioning ring boss 311 away from the transmission member boss 23 is provided with a positioning ring inclined surface 312; when the transmission member inclined surface 24 and the positioning ring inclined surface 312 slide relative to each other, the positioning ring 31 is caused to slide upward, so that the positioning ring boss 311 passes over the transmission member boss 23, thereby also achieving 360-degree reverse rotation adjustment. The positioning ring 31 is in a ring structure, which facilitates reasonable avoidance of structures such as the mounting shaft 5. The number of positioning ring bosses 311 is at least two, and is preferably three, and each positioning ring boss is arranged equidistantly along the circumference of the positioning ring 31; the number and position of the transmission member bosses 23 are matched with those of the positioning ring bosses 311; when multiple are arranged, the stress is more uniform, and unilateral stress is avoided. The positioning elastic member 32 is in an elastic sheet structure, 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, which is lower in cost. The end of the elastic sheet structure away from the positioning ring 31 protrudes to form a cylinder 321, which is used to reduce the relative sliding resistance between the elastic sheet structure and the housing 4. The number of elastic sheet structures is at least two, and each elastic sheet structure is arranged equidistantly along the circumference of the positioning ring 31; increasing the number of elastic sheet structures can improve the elasticity and the uniformity of the elastic force, and unilateral stress is avoided. A buffer portion 322 is formed between the elastic sheet structure and the positioning ring 31 to prevent the elastic sheet structure from breaking; because the elastic sheet structure and the positioning ring 31 are integrally formed, the folding phenomenon between the elastic sheet structure and the positioning ring 31 due to stress concentration can be avoided through the buffer portion 322. The buffer portion 322 can be that the thickness between the elastic sheet structure and the positioning ring 31 gradually decreases toward the middle, and meanwhile, the elastic sheet structure and the positioning ring 31 are transitioned with a round corner. In order to facilitate the sliding installation between the positioning ring 31 and the housing 4, the upper end of the positioning ring 31 is provided with an insertion block 313, which is inserted into the insertion groove 41 of the housing 4. Figure 16As shown, the housing 4 is provided with a slot 44, and the insertion block 313 is slidingly connected to the slot 44. The number of the insertion blocks 313 is preferably at least two, and each insertion block 313 is equidistantly arranged along the circumference of the positioning ring 31; and each insertion block 313 and each elastic sheet structure are preferably alternately arranged.

[0068] In the embodiment, as shown in Figure 6 The guide slot 21 further comprises a second horizontal section 213, which is smoothly connected to the end of the inclined section 212 away from the first horizontal section 211. When the guide column 11 slides to the end of the inclined section 212, if there is no locking protrusion 12 and locking groove 22, the mirror support cannot be folded until the guide column 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. If the locking protrusion 12 and the locking groove 22 are provided, the guide column 11 is required to slide to the end of the second horizontal section 213 or before the end of the second horizontal section 213, so that the locking protrusion 12 and the locking groove 22 are in contact to partially or completely offset the stress of the guide column 11. When the outside rearview mirror is unfolded from the folded state, the driving unit 7 is reversely driven. At the moment of reverse starting, the guide column 11 first slides in the second horizontal section 213, and the sliding resistance of the guide column 11 is also small, i.e. the load of the driving unit 7 at the moment of starting is also small.

[0069] It can be understood that the specific structure of the driving unit 7 is prior art, for example, the driving unit 7 comprises a motor 71, a transmission mechanism 72 and a transmission worm 73, the transmission worm 73 is rotatably installed in the housing 4, the transmission worm 73 is engaged with the gear body 1; the motor 71 is installed in the housing 4, the output shaft of the motor 71 drives the worm to rotate through the transmission mechanism 72; and the transmission mechanism 72 is preferably a worm and gear mechanism.

[0070] The application does not limit the way of slidingly fitting the guide column 11 into the guide slot 21, and the following only provides a reference example:

[0071] Example A, as shown in Figure 10 When the guide column 11 is located in the inner annular surface of the gear body 1, the transmission member 2 comprises at least two transmission member parts 20 which are mutually spliced; when each transmission member part 20 is separated, the gear body 1 is used to sleeve the outside of the transmission member 2, and the guide slot 21 is used to form a gap for the guide column 11 to enter. Through the split type transmission member 2, the assembly between the transmission member 2 and the gear body 1 is realized.

[0072] In Example B, when guide post 11 is located on the inner surface of gear body 1, the inner surface of gear body 1 is provided with a mounting hole. One end of guide post 11 is connected to the mounting hole via an elastic component, allowing the other end of guide post 11 to be fully pressed into the mounting hole. During assembly, it is only necessary to first press guide post 11 into the mounting hole. Once gear body 1 is sleeved onto the outside of transmission member 2 and guide post 11 is aligned with guide groove 21, the elastic component can push guide post 11 into guide groove 21. The elastic component can be a spring or other elastic structure.

[0073] In Example C, when the inner annular 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 each gear segment. During assembly, the guide post 11 can be first inserted into the guide groove 21, and then the gear segments are combined to form the gear body 1. In this case, the clamping groove between the gear segments can precisely clamp the guide post 11, thereby connecting the guide post 11 to the gear body 1.

[0074] In Example D, when the inner annular surface of the gear body 1 is provided with a guide groove 21 (i.e., when the guide post 11 is located on the outer annular surface of the transmission member 2), the gear body 1 is formed by splicing at least two gear parts together, and when the gear parts are separated, a gap is formed in the guide groove 21 for the guide post 11 to enter. During assembly, the gear parts can be separated from each other to form a gap in the guide groove 21. After the guide post 11 enters the guide groove 21 through the gap, the gear parts can be combined to form the gear body 1.

[0075] Example 2

[0076] The difference between this embodiment and other embodiments is that the folding device of the vehicle vision device also includes an auxiliary elastic member 8, which is arranged between the transmission member 2 and the shell 4 and is used to make the shell 4 move upward relative to the transmission member 2.

[0077] like Figure 11 As shown, during the lifting process, that is, when the guide column 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 column 11 drives the gear body 1, the drive unit 7, the housing 4 and the mirror bracket to lift upward. The lifting power is entirely dependent on the interaction between the guide column 11 and the inclined section 212, and the operating load of the drive unit 7 is large; during the reverse reset process, that is, when the guide column 11 slides along the inclined section 212 toward the first horizontal section 211, it rapidly descends under the action of the gravity of the gear body 1, the drive unit 7, the housing 4 and the mirror bracket (equivalent to the gravity of the entire exterior rearview mirror), so there is a phenomenon that the mirror bracket directly hits the mirror substrate 100. Figures 4-6As shown, after the auxiliary elastic member 8 is arranged, the elastic force of the auxiliary elastic member 8 can assist the driving shell 4 to rise during the lifting process, i.e. when the guide column 11 slides from the first horizontal section 211 into the inclined section 212 and continues to slide, thereby facilitating the reduction of the operation load of the driving unit 7. During the reverse resetting process, i.e. when the guide column 11 slides along the inclined section 212 towards the first horizontal section 211, the shell 4 needs to be lowered to compress the auxiliary elastic member 8, thereby playing a role of slow descent for the shell 4, avoiding the mirror support directly impacting the mirror base plate 100. In addition, the auxiliary elastic member 8 is also beneficial to eliminate the assembly gap, avoid the shaking between the internal structures of the folding device, and improve the operation fluency, avoiding the operation jamming phenomenon caused by the existence of the assembly gap.

[0078] The specific structure and mounting mode of the auxiliary elastic member 8 are not limited in the present application, for example, it can be a spring or other elastic structure, preferably a wave spring, and is directly clamped between the shell 4 and the transmission member 2 through the step on the shell 4.

[0079] Embodiment Three

[0080] The difference between the present embodiment and other embodiments is that, as shown in Figures 7-8 , the transmission member 2 is provided with a transmission member stop portion 25, as shown in Figure 9 , the shell 4 is provided with a shell stop portion 42; as shown in Figure 10 , when the mirror support is in the unfolded state (i.e. the guide column 11 slides in the first horizontal section 211), the transmission member stop portion 25 cooperates with the shell stop portion 42, for limiting the relative rotation between the transmission member 2 and the shell 4, thereby ensuring that the shell 4 (mirror support) and the transmission member 2 (mirror base plate 100) will not relatively rotate at the starting moment, and also ensuring the stability of the exterior rearview mirror during normal driving. As shown in Figures 7-8 , when the shell 4 is lifted to the upper limit, the shell stop portion 42 is separated from the transmission member stop portion 25, for removing the rotation limitation between the transmission member 2 and the shell 4, at this time the shell 4 can relatively rotate with the transmission member 2, thereby realizing the folding of the shell 4 (mirror support).

[0081] It should be understood that the application does not limit the shape of the transmission member stop portion 25 and the housing stop portion 42, but the transmission member stop portion 25 is preferably a trapezoidal or triangular groove structure, and the housing stop portion 42 is preferably a trapezoidal or triangular protrusion structure (of course, the transmission member stop portion 25 can also be a trapezoidal or triangular protrusion structure, and the housing stop portion 42 can be a trapezoidal or triangular groove structure), and the size of the protrusion structure is matched with the size of the groove structure. Since both the trapezoidal and the triangular have inclined surfaces, when the acting force is large enough, relative sliding between the inclined surfaces can still occur, thereby preventing damage caused by excessive external force. In addition, due to the existence of machining and assembly errors, the transmission member stop portion 25 and the housing stop portion 42 can still not be completely separated after the housing 4 is lifted to the upper limit. At this time, relative sliding can also occur under the action of the inclined surfaces of the protrusion structure and the groove structure, thereby further lifting the housing 4, and avoiding the occurrence of jamming during operation.

[0082] Embodiment Four

[0083] Since a gap is generated between the mirror support and the mirror base plate 100 before the folding action of the outside rearview mirror, only the mounting shaft 5 supports the entire outside rearview mirror at this time, thereby resulting in poor support stability between the structures inside the mirror support.

[0084] To solve the above problems, the embodiment is different from other embodiments in that, as shown in Figures 4-6 , the housing 4 is provided with a support block 43, as shown in Figure 9 , the outer wall of the transmission member 2 is provided with a support groove 26, and the inner wall of the support groove 26 is provided with a locking groove 27 on the lower side; as shown in Figure 10 , when the mirror support is in the unfolded state, the support block 43 is clamped in the locking groove 27, which is used to limit the relative rotation between the transmission member 2 and the housing 4, and plays a role equivalent to the transmission member stop portion 25 and the housing stop portion 42. When the transmission member stop portion 25 and the housing stop portion 42 are used at the same time, the acting force between the housing 4 and the transmission member 2 can also be shared, and the total contact area can also be increased to reduce wear; as shown in Figure 12 , when the housing 4 is lifted to the upper limit, the support block 43 is separated from the locking groove 27; as shown in Figure 10As shown, the support block 43 is slidingly connected to the support groove 26 when the mirror support is folded. Therefore, when the gear body 1, the driving unit 7, the housing 4 and the mirror support are lifted and the folding of the outside rearview mirror is continued, the support block 43 on the housing 4 is slidingly connected in the support groove 26, that is, the height between the housing 4 (the mirror support) and the transmission member 2 (the mirror base plate 100) does not change, so that the support stability between the housing 4 and the transmission member 2 can be better realized. In cooperation 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, so that the support stability can be further improved and the shaking can be reduced.

[0085] It should be understood that if the support block 43 and the support groove 26 are not provided, the inner annular surface of the gear body 1 is rotationally fitted to the outer annular surface of the transmission member 2, and the guide column 11 is slidingly connected in the guide groove 21, which can also play a positioning role. At this time, the internal force of the folding device is mostly applied between the gear body 1 and the transmission member 2, and the overall stability is poor. In the presence of machining and assembly errors, the internal structure may even shake, but in cooperation with 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.

[0086] In the embodiment, as shown in the figure, Figure 2 The support block 43 and the two sides of the locking groove 27 are both adapted to be provided with guide inclined surfaces 431, which are used to enable the support block 43 and the locking groove 27 to slide relative to each other under the action of an external force, so as to prevent the occurrence of jamming.

[0087] In the embodiment, the support groove 26 is preferably arranged around the transmission member 2, and the number of the locking grooves 27 is preferably three, which are equally spaced along the circumference of the transmission member 2.

[0088] Embodiment five

[0089] The difference between the present embodiment and other embodiments is that, as shown in Figure 4 , Figure 5 and Figure 5As shown, the folding device of the vehicle vision device further comprises a mounting structure 6, which comprises 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 connected to the mounting shaft 5 in a sliding manner, 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, the transmission member 2 can be easily installed 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 mode can also ensure that the transmission member 2 and the mounting shaft 5 (mirror base plate 100) can rotate relative to each other under the action of a large external force, avoiding damage to the electric folding function of the outside rearview mirror due to collision or manual rotation. The fastener 63 can be installed on the mounting shaft 5 by thread connection or interference fit, so as to be fixed at any position on the mounting shaft 5. The clamping elastic member 62 is preferably a coil spring, which can be directly sleeved on the mounting shaft 5. In addition, for the split transmission member 2, a plurality of transmission member splits 20 can be pressed together, thereby eliminating the need for fixing between the transmission member splits 20.

[0090] In this embodiment, as shown in Figure 20 The upper end of the base 61 is provided with a first clamping groove 611 in a trapezoidal structure or a triangular structure, as shown in Figure 5 The lower end of the transmission member 2 is provided with a first clamping block 28 for adapting to the first clamping groove 611. When an external force causes the mirror support to rotate, the first clamping block 28 and the first clamping groove 611 slide relative to each other. Through the locking action between the first clamping block 28 and the first clamping groove 611, the transmission member 2 and the mounting shaft 5 (mirror base plate 100) can be prevented from rotating relative to each other, thereby maintaining the stability of the outside rearview mirror during normal driving of the vehicle. However, when an external force acts on the outside rearview mirror, the trapezoidal or triangular slope 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.

[0091] In this embodiment, due to the size limitation of the inside of the outside rearview mirror, in order to meet the strength requirement, it is not possible to directly design the size of the folding device to be large enough. In order to further share the force that forces the mirror support to rotate, as shown in Figure 8 The upper end of the base 61 is provided with a second clamping groove 612 in a trapezoidal structure or a triangular structure, as shown in Figure 8As shown, the shell 4 is provided with a second clamping block 45 for adapting the second clamping groove 612; when the mirror support is rotated by external force, the second clamping block 45 and the second clamping groove 612 slide relative to each other. In addition, since the base 61 is installed on the mirror base plate 100, the height position of the base 61 is fixed, and the relative sliding between the second clamping block 45 and the second clamping groove 612 actually drives the shell 4 (the mirror support) to lift upward, thereby ensuring that there is a gap between the mirror support and the mirror base plate 100 when the mirror is rotated by external force, preventing wear between the mirror support and the mirror base plate 100.

[0092] In this embodiment, as shown in Figures 9-10 , for easy processing, the second clamping block 45 is integrally formed on the shell 4, and the support block 43 is integrally extended from the second clamping block 45; when the mirror support is rotated by external force, the second clamping block 45 and the second clamping groove 612 slide relative to each other (as shown in Figure 2 ), and the support block 43 and the locking groove 27 slide relative to each other. The support block 43 and the second clamping block 45 can also be independently formed on the shell 4. 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 when reversed.

[0093] In this embodiment, as shown in Figure 8 and Figure 25 , the shell 4 includes at least two shell bodies 41 that are spliced and fixed to each other, one of the shell bodies 41 is provided with an annular first step 411 and an annular second step 412; the first step 411 is located above the second step 412, and the inner diameter of the first step 411 is smaller than the inner diameter of the second step 412; the lower side of the first step 411 is used to form the shell stop 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.

[0094] In this embodiment, in order to realize quick installation and disassembly between the mounting shaft 5 and the mirror base plate 100, as shown in Figure 5 , the mirror base plate 100 is provided with a plug hole 101 for adapting the base 61, and the inner wall of the plug hole 101 is provided with a fixing part 102; as shown in Figure 22 , the base 61 is sleeved on the mounting shaft 5, and the outer side of the lower end of the base 61 is provided with a receiving groove 613 for adapting the fixing part 102; the lower end of the mounting shaft 5 is provided with a limiting part 51 and an avoiding groove 52; as shown in Figure 23 , when the avoiding groove 52 coincides with the receiving groove 613, the limiting part 51 and the base 61 can be inserted into the plug hole 101, and the fixing part 102 is accommodated in the receiving groove 613; as shown in Figure 24As shown, when the 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 fixed portion 102 (i.e. the accommodating groove 613), and then the external force is removed, and as shown, Figure 5 As shown, under the action of the clamping elastic member 62, the spacing between the limiting portion 51 and the base 61 becomes smaller, so that the limiting portion 51 and the base 61 clamp the fixed portion 102, that is, the installation of the mounting shaft 5 and the mirror base plate 100 is completed. Conversely, when the mounting shaft 5 is first pressed down and then rotated, the mounting shaft 5 and the mirror base plate 100 can be disassembled.

[0095] In this embodiment, in order to improve the uniformity of the force, as shown, Figure 25 and Figure 25 As shown, the number of accommodating grooves 613, limiting portions 51, avoiding grooves 52 and fixed portions 102 is preferably four.

[0096] In this embodiment, as shown, Figure 5 The two sides of the fixed portion 102 extend downwardly with a baffle 103, and the baffle 103 is used to limit the relative rotation between the limiting portion 51 and the mirror base plate 100; under the limiting of the baffle 103, the limiting portion 51 is prevented from deviating from the fixed portion 102, thereby improving the stability of the assembly therebetween.

[0097] In this embodiment, during the assembly of the mounting shaft 5, the base 61 is located inside the insertion hole 101, so that the assembly position cannot be directly observed. In order to improve the assembly accuracy and the operation convenience, as shown, Figure 21 A positioning block 53 is arranged between the mounting shaft 5 and the limiting portion 51, and as shown, ​ A positioning groove 614 is arranged between the lower side of the base 61 and the inner annular surface; when the mounting shaft 5 and the base 61 rotate relative to each other, the positioning block 53 is slidingly fitted in 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 in the area of the positioning groove 614, thereby enabling the positioning block 53 to rotate from one side of the positioning groove 614 to the other side, and the accurate assembly of the limiting portion 51 is realized.

[0098] In this embodiment, the mounting can also be performed in cooperation with a screw, so as to provide various mounting modes. For example, a screw mounting hole 615 is arranged on the lower side of the base 61, and a screw through hole 511 is arranged on the limiting portion 51 corresponding to the screw mounting hole 615.

[0099] It should be understood that each of the above embodiments can be implemented alone or in any combination. In addition, the transmission gear structure, the transmission member 2 and the mounting structure 6 and the like can also be implemented alone or in any combination, so as to be used for the supply of parts of the folding device of the vehicle vision device.

[0100] The foregoing describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited to the above-described embodiments, and the above-described embodiments and descriptions in the specification are only the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application.

Claims

1. A folding device for a vehicle vision device, comprising a housing mounted on a mirror bracket, a mounting shaft mounted on a mirror base plate, 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 a transmission gear structure; the inner annular surface of the gear body is provided with a guide column along the radial direction; The transmission member is coaxially mounted on the mounting shaft, and a guide groove is provided on the outer wall of the transmission member at a position corresponding to the guide post along the circumferential direction. The guide groove includes a first horizontal section and an inclined section. One end of the inclined section is smoothly connected to the first horizontal section, and the guide post is slidably fitted in the guide groove. The gear body is rotatably mounted on the housing, the gear body is coaxially sleeved on the outside of the transmission member, and the gear body is meshed with the driving unit; When the guide post is slidably engaged with the first horizontal section, the mirror bracket is in an 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, the transmission gear structure, the driving unit, the housing, and the mirror bracket are lifted upward; when the guide post slides to the end of the inclined section and continues to drive, the mirror bracket is folded; When the exterior rearview mirror needs to be folded, the drive unit drives the gear body, thereby driving the guide column to rotate. At this time, the guide column slides within the first horizontal section, and the guide column does not generate a component force in the up and down directions. When the guide column slides to the end of the inclined section, the gear body, housing, drive unit and mirror bracket are lifted to the upper limit. At this time, the transmission member prevents the gear body from continuing to rotate. That is, the entire structure composed of the drive unit, housing and mirror bracket rotates clockwise around the gear body, thereby realizing the folding of the mirror bracket. 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 column slides to contact with the end of the inclined section or before contact, the locking protrusion contacts and cooperates with the locking groove to limit the relative rotation between the gear body and the transmission member.

2. The folding device for a vehicle visual device according to claim 1, characterized in that: The guide groove also includes a second horizontal section, one end of which is smoothly connected to the end of the inclined section away from the first horizontal section; when the guide column slides from the inclined section to the end of the second horizontal section and continues to drive, it is used to cause the mirror bracket to fold.

3. The folding device for a vehicle visual device according to claim 2, wherein: 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 column slides to contact with the end of the second horizontal section or before contact, the locking protrusion contacts and cooperates with the locking groove to limit the relative rotation between the gear body and the transmission member.

4. The folding device for a vehicle visual device according to claim 1, wherein: The upper end of the transmission member is provided with a transmission member boss; the folding device of the vehicle vision device also includes a positioning structure, and the positioning structure includes a positioning ring and a positioning elastic member; the positioning ring is slidably installed up and down on the shell, and the lower end of the positioning ring is provided with a positioning ring boss; the positioning elastic member is arranged on the shell or the positioning ring, and is used to make the transmission member boss contact with the positioning ring and / or 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 face 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 face 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.

5. The folding device for a vehicle visual device according to claim 1, wherein: A support block is provided on the shell, 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 engaged with the locking groove to limit the relative rotation between the transmission member and the shell; when the shell is lifted to the upper limit, the support block is separated from the locking groove; when the mirror bracket is folded, the support block is slidably connected to the support groove.

6. The folding device for a vehicle visual device according to claim 5, characterized in that: Both sides of the support block and the locking groove are adapted to be provided with guiding inclined surfaces, and the guiding inclined surfaces are used to enable relative sliding between the support block and the locking groove under the action of external force.

7. The folding device for a vehicle visual device according to claim 1, wherein: The folding device of the vehicle vision device further includes an auxiliary elastic member, which is arranged between the transmission member and the housing and is used to move the housing upward relative to the transmission member; And / or, a transmission member stop portion is provided on the outside of the transmission member, and a shell stop portion is provided on the shell; when the mirror bracket is in the unfolded state, the transmission member stop portion cooperates with the shell stop portion to limit the relative rotation between the transmission member and the shell; when the shell is lifted to the upper limit, the shell stop portion is separated from the transmission member stop portion to release the rotation restriction between the transmission member and the shell.

8. The folding device for a vehicle visual device according to claim 1, wherein: The folding device of the vehicle vision device also includes a mounting structure, which 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, 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. A first card slot with a trapezoidal or 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 or 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 shell; when an external force causes the mirror bracket to rotate, relative sliding occurs between the second card block and the second card slot.

9. The folding device for a vehicle visual device according to claim 8, characterized in that: The mirror base plate is provided with a socket for adapting to the base, and a fixing portion is provided on the inner wall of the socket; the base is sleeved on the mounting shaft, and an accommodating 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 accommodating groove, the limiting portion and the base are inserted into the socket, and the fixing portion is accommodated in the accommodating groove; When an external force first presses down the installation shaft and then rotates the installation shaft until the limiting portion moves below the fixing portion, after the external force is removed, the clamping elastic member is used to clamp the fixing portion between the limiting portion and the base; Baffles are downwardly extended from both sides of the fixing portion, and the space between the two corresponding baffles is used to limit the relative rotation between the limiting portion and the mirror substrate.

Images