Folding rearview mirror of motor vehicle

Abstract

The utility model relates to a folding rearview mirror of a motor vehicle. The folding rearview mirror comprises a connecting shaft, a mounting frame, a bracket and a turntable, the rotary table is driven by a driving mechanism, and the limiting groove of the rotary table is matched with the limiting protruding block of the support to achieve linkage. The linkage structure comprises a first plane on the connecting shaft and a second plane of the upper connecting gasket, and coaxial rotation is ensured. During automatic folding, the driving mechanism pushes the rotary table, and the support is driven to rotate synchronously through the groove / protruding block. During manual folding, external force enables the protruding block to slide along the inclined end face of the groove, the support axially displaces to be separated from clamping, and self-locking damage of the worm gear and the worm is avoided. Physical limiting is formed by additionally arranging the lower limiting gasket, the fan-shaped groove and the stand column, and excessive folding is prevented. By means of the design, automatic / manual mode switching folding rearview mirrors are achieved.

Description

Technical Field

[0001] The utility model specifically relates to a folding rearview mirror for a motor vehicle. Background Art

[0002] The folding rearview mirrors of motor vehicles are located on the left and right sides of the head of the motor vehicle. The folding rearview mirrors of motor vehicles are mainly used to reflect the situation behind the motor vehicle. For example, the folding rearview mirror for a motor vehicle disclosed in the publication number "CN219044375U" includes: a mounting bracket, which forms an extension platform, and a first arc-shaped protrusion is arranged on the extension platform; a driving housing, which is mounted on the mounting bracket and forms a mounting position, the mounting position is arranged in a circular structure, and the axis of the mounting position is collinear with the axis of the first arc-shaped protrusion; a turntable, which is placed in the mounting position and is connected to a driving member installed in the driving housing; a bracket, which forms a second arc-shaped protrusion, the second arc-shaped protrusion penetrates through the turntable and the mounting position and abuts against the extension platform, the second arc-shaped protrusion can rotate relative to the extension platform, and the axis of the second arc-shaped protrusion is collinear with the axis of the first arc-shaped protrusion; a connecting member, which sequentially penetrates through the extension platform, the mounting position, the turntable and the bracket, and connects the extension platform, the mounting position, the turntable and the bracket along the axial direction of the connecting member.

[0003] This folding rearview mirror for a motor vehicle can realize the electric or manual folding of the rearview mirror, but it has the following technical defects: in this prior art, the connecting shaft is usually only used as a fixed support shaft and no linkage relationship is established with the bracket, that is, the connecting shaft will not rotate along with the bracket when the bracket rotates, resulting in deformation of the bracket due to the cantilever structure when the bracket rotates, the rotation of the connecting shaft and the bracket is not synchronous, and there is a deviation between the actual rotation angle of the lens and the driving angle of the turntable, affecting the accuracy of the vision adjustment. Summary of the Utility Model

[0004] The technical problem to be solved by the utility model is to provide a folding rearview mirror for a motor vehicle aiming at the deficiencies of the above prior art, in which the bracket can drive the connecting shaft to rotate synchronously, and in some adjustment states, the bracket can also move axially relative to the connecting shaft.

[0005] To achieve the above object, the utility model provides the following technical solutions: A folding rearview mirror for a motor vehicle, includes a connecting shaft, a mounting bracket sleeved on the outer periphery of the connecting shaft and a bracket, the bracket and the mounting bracket are arranged in sequence along the axial direction of the connecting shaft, a turntable rotatably arranged on the mounting bracket is arranged between the mounting bracket and the bracket, the turntable is linked with a driving mechanism capable of driving the turntable to rotate, a plurality of groups of limiting grooves are arranged on one side of the turntable facing the bracket, a group of adapted limiting protrusions are arranged on the bracket corresponding to each group of limiting grooves, both ends of the limiting grooves and the limiting protrusions along their arc directions are arranged in an inclined shape, and the feature is that: a linkage structure is arranged between the connecting shaft and the bracket, and the connecting shaft is kept coaxial with the bracket to rotate through the linkage structure.

[0006] With the above technical solution, when the driving mechanism drives the turntable to rotate, the limit groove of the turntable pushes the limit bump of the bracket through the inclined end surface, driving the bracket to rotate around the connecting shaft; at the same time, the linkage structure (such as plane matching, etc.) makes the connecting shaft and the bracket rotate synchronously and maintain coaxiality. The linkage structure eliminates the problem of asynchronous rotation of the connecting shaft and the bracket, and improves the rotation rigidity (reduces the angle deviation caused by the deformation of the bracket); the inclined design of the limit groove / bump allows the bracket to overcome resistance and separate from the turntable during manual folding (realizing automatic / manual switching), and ensures accurate resetting through the inclined surface guidance; the coaxial rotation of the connecting shaft and the bracket enhances the overall structural stability, reduces the transmission gap (improves the motor drive response speed), and at the same time, the inclined limit structure and the linkage coaxial rotation form jointly ensure the control accuracy of the folding angle.

[0007] The above-mentioned motor vehicle folding rearview mirror can be further configured as follows: the linkage structure includes an upper connecting gasket sleeved on the outer periphery of the connecting shaft, the outer periphery of the connecting shaft is provided with a first plane arranged along the axial direction of the connecting shaft, the inner periphery of the upper connecting gasket is provided with a second plane that is in contact with the first plane, the upper connecting gasket is linked with the bracket, the outer periphery of the connecting shaft is sleeved with a first elastic member, one end of the first elastic member is in contact with the upper end of the connecting shaft, and the other end is in contact with the upper connecting gasket.

[0008] With the above technical solution, in the automatic folding mode, the driving mechanism controls the rotation of the turntable, and drives the bracket to rotate synchronously through the "limiting groove / limiting protrusion", the bracket drives the upper connecting gasket to rotate synchronously, and the upper connecting gasket drives the connecting shaft to rotate synchronously through the first plane and the second plane (during this process, the bracket will not move along the axial direction of the connecting shaft) until the unfolding or folding state. In the manual folding mode, the bracket is pushed by hand. Since the arc direction of the limiting groove and the limiting protrusion is inclined at both ends (similar to the "wedge" or "slope" structure), when the human hand acts on the bracket, the inclined end face of the limiting protrusion will slide along the inclined end face of the limiting groove. At this time, the bracket drives the upper connecting gasket to rotate coaxially, and the upper connecting gasket drives the connecting shaft to rotate coaxially through the first plane and the second plane. At the same time, the upper connecting gasket will squeeze the first elastic member, and the bracket and the upper connecting gasket will both be slightly displaced along the axial direction of the connecting member (i.e., the direction of the rotation axis of the rearview mirror), so that the limiting protrusion is out of the clamping state with the limiting groove. After the limiting protrusion is separated from the limiting groove, the bracket can rotate freely relative to the turntable, and the rear-view mirror can be folded by manual bending, avoiding the risk of damage to the drive mechanism caused by the lock of the turntable (self-locking of the worm gear) when bending directly. Among them, the upper connecting gasket replaces the bracket and the connecting shaft to perform coaxial linkage or axial sliding, reducing the wear between the connecting shaft and the bracket.

[0009] The above-mentioned motor vehicle folding rearview mirror can be further configured as follows: the linkage structure includes a first plane arranged on the outer periphery of the connecting shaft, the first plane is arranged along an axial direction parallel to the connecting shaft, the bracket is provided with a first mounting hole sleeved on the outer periphery of the connecting shaft, the inner periphery of the first mounting hole is provided with a third plane in contact with the first plane, the outer periphery of the connecting shaft is sleeved with a first elastic member, one end of the first elastic member is in contact with the upper end of the connecting shaft, and the other end is in contact with the bracket.

[0010] With the above technical solution, in the automatic folding mode, the driving mechanism controls the rotation of the turntable, and drives the bracket to rotate synchronously through the "limiting groove / limiting protrusion", and the bracket drives the connecting shaft to rotate synchronously through the first plane and the third plane (during this process, the bracket will not move along the axial direction of the connecting shaft) until it is unfolded or folded. In the manual folding mode, the bracket is pushed by hand. Since both ends of the arc direction of the limiting groove and the limiting protrusion are inclined (similar to the "wedge" or "slope" structure), when the human hand acts on the bracket, the inclined end face of the limiting protrusion will slide along the inclined end face of the limiting groove. At this time, the bracket drives the connecting shaft to rotate coaxially through the first plane and the third plane, and at the same time, the bracket squeezes the first elastic member, and the bracket is slightly displaced along the axial direction of the connecting member (i.e., the direction of the rotation axis of the rearview mirror), so that the limiting protrusion is out of the clamping state with the limiting groove. After the limiting protrusion is separated from the limiting groove, the bracket can rotate freely relative to the turntable, and the rear-view mirror can be folded by manual bending, avoiding the risk of damage to the driving mechanism caused by turntable locking (worm gear self-locking) when directly bending.

[0011] The above-mentioned motor vehicle folding rearview mirror can be further configured as follows: the linkage structure also includes an upper connecting gasket sleeved on the outer periphery of the connecting shaft, the inner periphery of the upper connecting gasket is provided with a second plane that fits the first plane, and the upper connecting gasket is linked to the bracket.

[0012] By adopting the above technical solution, the upper connecting gasket replaces the bracket to coaxially link or axially slide with the connecting shaft, thereby reducing the wear between the connecting shaft and the bracket. In this solution, in the manual folding mode, the bracket is pushed by hand. Since both ends of the arc direction of the limiting groove and the limiting protrusion are inclined (similar to a "wedge" or "slope" structure), when the human hand acts on the bracket, the inclined end face of the limiting protrusion will slide along the inclined end face of the limiting groove. At this time, the bracket not only drives the connecting shaft to rotate coaxially through the first plane and the third plane, but also drives the upper connecting gasket to rotate coaxially. The upper connecting gasket drives the connecting shaft to rotate coaxially through the first plane and the second plane. At the same time, the upper connecting gasket will squeeze the first elastic member, and the bracket and the upper connecting gasket will both be slightly displaced along the axial direction of the connecting member (i.e., the direction of the rotation axis of the rearview mirror), so that the limiting protrusion is separated from the clamping state with the limiting groove. After the limiting protrusion is separated from the limiting groove, the bracket can rotate freely relative to the turntable, and the rear-view mirror can be folded by manual bending, avoiding the risk of damage to the drive mechanism caused by the lock of the turntable (self-locking of the worm gear) when bending directly. Among them, the upper connecting gasket replaces the bracket and the connecting shaft to perform coaxial linkage or axial sliding, reducing the wear between the connecting shaft and the bracket.

[0013] The above-mentioned folding rearview mirror for motor vehicles can be further configured as follows: a first plug hole is provided on the bracket, and a first protrusion that is inserted into the first plug hole is provided on the upper connecting gasket.

[0014] By adopting the above technical solution, when the bracket rotates, the upper connecting gasket is driven to rotate synchronously through the first protrusion, and the upper connecting gasket will move along the axial direction of the connecting shaft with the bracket, thereby squeezing and releasing the first elastic member.

[0015] The above-mentioned motor vehicle folding rearview mirror can be further configured as follows: a lower limit gasket is sleeved on the connecting shaft and rotates coaxially with the connecting shaft, a fan-shaped groove is provided on the outer edge of the lower limit gasket, and the mounting frame is provided with a column corresponding to the fan-shaped groove, and the column is inserted into the fan-shaped groove.

[0016] With the above technical solution, when the bracket rotates, the bracket drives the connecting shaft to rotate, and the connecting shaft drives the lower limit gasket to rotate until the limit position, the column will directly contact the end of the fan-shaped groove, forming a physical barrier to prevent the bracket from further rotating. Therefore, the fan-shaped groove is used to limit the folding angle of the rearview mirror to avoid excessive folding that causes the lens to collide with the vehicle body or structural damage.

[0017] The above-mentioned motor vehicle folding rearview mirror can be further configured as follows: a lower connecting hole sleeved on the outer periphery of the connecting shaft is provided in the middle part of the lower limit gasket, the inner wall of the lower connecting hole is provided with a fourth plane that fits with the first plane, and an annular groove is also provided on the outer periphery of the connecting shaft, a stop gasket is clamped at the annular groove, and the lower limit gasket is distributed between the stop gasket and the mounting frame.

[0018] By adopting the above technical solution, the lower limit gasket keeps synchronous rotation with the connecting shaft through the fourth plane and the first plane, thereby limiting the folding angle and avoiding excessive folding. A stop gasket is further added to limit the lower limit gasket, ensuring that the lower limit gasket is fixed between the stop gasket and the mounting frame to prevent the column from sliding out of the fan-shaped groove.

[0019] The above-mentioned motor vehicle folding rearview mirror can be further configured as follows: a plurality of groups of embedded positions are provided on the side of the turntable facing the mounting frame, a stop portion is formed at one end of the embedded position, and an inclined guide portion extending along an arc direction is formed at the other end, and a group of positioning holes is provided on the mounting frame corresponding to each group of embedded positions, and a limiting column and a second elastic member are provided at the positioning holes, one end of the second elastic member is in contact with the inner end of the positioning hole, and the other end is in contact with the limiting column, and the limiting column is placed in a group of embedded positions under the push of the elastic limiting member.

[0020] With the above technical solution, the limiting column is stuck into one of the embedded positions under the action of the second elastic member in the initial position. Since the limiting column is against the stopper, the position of the turntable can be stably limited to prevent the turntable from accidentally rotating due to vibration or external force, ensure the linkage accuracy of the turntable and the bracket when the motor is driven, and prevent the rearview mirror from rotating automatically due to external force (such as wind) after it is automatically folded into place. In the manual folding field mode, the bracket is separated from the inclined end face of the limiting groove of the turntable by the limiting protrusion. At this time, the bracket can rotate relative to the turntable; but the turntable still needs to follow the partial rotation of the bracket (to achieve folding angle adjustment). At this time, the limiting column cooperates with the inclined guide part of the embedded position to guide the turntable to rotate. When the turntable rotates, the end of the limiting column will slide along the inclined surface of the inclined guide part (due to the action of the second elastic member, the limiting member can move toward the positioning hole). The inclined surface design of the inclined guide part can convert the rotational friction of the turntable into axial pressure on the limiting column (compressing the second elastic member), reducing the resistance when manually bending.

[0021] The above-mentioned motor vehicle folding rearview mirror can be further configured as follows: the driving mechanism includes a motor, a driven worm, and an active worm linked to the output end of the motor, the driven worm is provided with a driven turbine linked to the active worm, the driven worm is linked to an output turbine, and the output turbine is linked to the turntable; the mounting frame is detachably connected to a limit plate, the limit plate is respectively provided with a group of guide columns corresponding to the two ends of the driven worm, the lower end of the guide column is provided with an upper spherical groove, the mounting frame is provided with a lower spherical groove corresponding to each group of guide columns, a steel ball is provided between each group of guide columns and the lower spherical groove, the steel ball is provided with a second socket, and the end of the driven worm is inserted into the second socket.

[0022] With the above technical solution, the motor drives the turntable to rotate through the driving worm, driven turbine, driven worm, and output turbine, thereby realizing the automatic control of the rearview mirror folding. The steel ball is placed between the upper and lower spherical grooves to form a hinge. After the end of the driven worm is inserted into the second jack of the steel ball, both ends of the driven worm are in a rotating form, which not only realizes force transmission but also reduces wear.

[0023] The following further describes the present utility model in detail with reference to the drawings and embodiments. Description of the Drawings

[0024] Figure 1 It is a schematic structural diagram of the first embodiment of the present utility model;

[0025] Figure 2 It is an exploded schematic diagram of the first embodiment of the present utility model;

[0026] Figure 3 It is a partially enlarged schematic diagram of the positional relationship between the sector groove and the column in the first embodiment of the present utility model;

[0027] Figure 4 It is a partial structural schematic diagram of the connecting shaft in the first embodiment of the present utility model;

[0028] Figure 5 It is a schematic diagram of the turntable in the first embodiment of the present utility model;

[0029] Figure 6 It is a schematic diagram of the mounting bracket in the first embodiment of the present utility model;

[0030] Figure 7 It is a schematic diagram of the limiting plate in the first embodiment of the present utility model.

[0031] Label annotations: mounting bracket 1, column 101, positioning hole 102, lower spherical groove 103; bracket 2, limiting convex block 201, first jack 202, first mounting hole 203; connecting shaft 3, first plane 301, annular groove 302; turntable 4, limiting groove 401, embedded position 402, stop portion 403, inclined guiding portion 404; upper connecting gasket 5, second plane 501, first convex block 502; first elastic member 6; lower limiting gasket 7, sector groove 701, lower connecting hole 702, fourth plane 703; stop gasket 8, limiting column 9, second elastic member 10, motor 11, driven worm 12, driving worm 13, driven turbine 14, output turbine 15; limiting plate 16, guiding column 1601, upper spherical groove 1602; steel ball 17. Detailed Embodiment

[0032] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0033] Embodiment 1: As Figures 1 to 7 shown in the folding rearview mirror of a motor vehicle, which includes a connecting shaft 3, a mounting bracket 1 sleeved on the outer periphery of the connecting shaft 3, and a bracket 2. The bracket 2 and the mounting bracket 1 are arranged in sequence along the axial direction of the connecting shaft 3. A turntable 4 rotatably arranged on the mounting bracket 1 is provided between the mounting bracket 1 and the bracket 2. The turntable 4 is linked with a driving mechanism capable of driving the turntable 4 to rotate. A plurality of groups of limiting grooves 401 are provided on one side of the turntable 4 facing the bracket 2. A group of matching limiting protrusions 201 are provided on the bracket 2 corresponding to each group of limiting grooves 401. Both ends of the limiting grooves 401 and the limiting protrusions 201 in the arc direction are inclined. A linkage structure is provided between the connecting shaft 3 and the bracket 2. The connecting shaft 3 keeps coaxial rotation with the bracket 2 through the linkage structure.

[0034] The linkage structure includes an upper connecting gasket 5 sleeved on the outer periphery of the connecting shaft 3. A first plane 301 is arranged on the outer periphery of the connecting shaft 3 along the axial direction of the connecting shaft 3. A second plane 501 that fits with the first plane 301 is arranged on the inner periphery of the upper connecting gasket 5. The upper connecting gasket 5 is linked with the bracket 2. A first elastic member 6 is sleeved on the outer periphery of the connecting shaft 3. One end of the first elastic member 6 is in contact connection with the upper end of the connecting shaft 3, and the other end is in contact connection with the upper connecting gasket 5. A first insertion hole 202 is provided on the bracket 2. A first protrusion 502 inserted into the first insertion hole 202 is provided on the upper connecting gasket 5. When the bracket 2 rotates, the upper connecting gasket 5 is driven to rotate synchronously through the first protrusion 502, and the upper connecting gasket 5 will move along the axial direction of the connecting shaft 3 following the bracket 2, thereby squeezing and releasing the first elastic member 6.

[0035] In the automatic folding mode, the driving mechanism controls the turntable 4 to rotate, and drives the bracket 2 to rotate synchronously through the "limiting groove 401 / limiting protrusion 201", and the bracket 2 drives the upper connecting gasket 5 to rotate synchronously, and the upper connecting gasket 5 drives the connecting shaft 3 to rotate synchronously through the first plane 301 and the second plane 501 (in this process, the bracket 2 will not move along the axial direction of the connecting shaft 3) until it is unfolded or folded. In the manual folding mode, the bracket 2 is pushed by hand. Since the arc direction of the limiting groove 401 and the limiting protrusion are both inclined (similar to a "wedge" or "slope" structure), when the human hand acts on the bracket 2, the inclined end face of the limiting protrusion will slide along the inclined end face of the limiting groove 401. At this time, the bracket 2 drives the upper connection gasket 5 to rotate coaxially, and the upper connection gasket 5 drives the connecting shaft 3 to rotate coaxially through the first plane 301 and the second plane 501. At the same time, the upper connection gasket 5 will squeeze the first elastic member 6, and the bracket 2 and the upper connection gasket 5 will both be slightly displaced along the axial direction of the connecting member (i.e., the direction of the rotation axis of the rearview mirror), so that the limiting protrusion is separated from the clamping state with the limiting groove 401. After the limiting protrusion is separated from the limiting groove 401, the bracket 2 can rotate freely relative to the turntable 4, that is, the rearview mirror can be folded by manual bending, avoiding the risk of damage to the drive mechanism caused by the locking of the turntable 4 (self-locking of the worm gear) when directly bending. Among them, the upper connection gasket 5 replaces the bracket 2 to coaxially link or axially slide with the connecting shaft 3, reducing the wear between the connecting shaft 3 and the bracket 2.

[0036] The connecting shaft 3 is sleeved with a lower limit washer 7 that rotates coaxially with the connecting shaft 3. The outer edge of the lower limit washer 7 is provided with a fan-shaped groove 701. The mounting frame 1 is provided with a column 101 corresponding to the fan-shaped groove 701. The column 101 is inserted into the fan-shaped groove 701. When the bracket 2 rotates, the bracket 2 drives the connecting shaft 3 to rotate, and the connecting shaft 3 drives the lower limit washer 7 to rotate until the limit position, the column 101 will directly contact the end of the fan-shaped groove 701, forming a physical barrier to prevent the bracket 2 from further rotating. Therefore, the fan-shaped groove 701 is used to limit the folding angle of the rearview mirror to avoid excessive folding resulting in collision between the lens and the vehicle body or structural damage.

[0037] The middle part of the lower limit gasket 7 is provided with a lower connection hole 702 sleeved on the outer periphery of the connecting shaft 3, and the inner wall of the lower connection hole 702 is provided with a fourth plane 703 that fits the first plane 301. The outer periphery of the connecting shaft 3 is also provided with an annular groove 302, and a stop gasket 8 is clamped at the annular groove 302. The lower limit gasket 7 is distributed between the stop gasket 8 and the mounting bracket 1. When the bracket 2 rotates, the bracket 2 drives the connecting shaft 3 to rotate, and the connecting shaft 3 drives the lower limit gasket 7 to rotate until the limit position, the column 101 will directly contact the end of the fan-shaped groove 701, forming a physical barrier to prevent the bracket 2 from further rotating. Therefore, the fan-shaped groove 701 is used to limit the folding angle of the rearview mirror to avoid excessive folding resulting in collision between the lens and the vehicle body or structural damage.

[0038] The turntable 4 is provided with a plurality of groups of embedded positions 402 on one side facing the mounting frame 1. A stopper 403 is formed at one end of the embedded position 402, and an inclined guide portion 404 extending in an arc direction is formed at the other end. A group of positioning holes 102 is provided on the mounting frame 1 corresponding to each group of embedded positions 402. A limiting column 9 and a second elastic member 10 are provided at the positioning holes 102. One end of the second elastic member 10 is in contact with the inner end of the positioning hole 102, and the other end is in contact with the limiting column 9. The limiting column 9 is placed in a group of embedded positions 402 under the push of the elastic limiting member. In the initial position, the limiting column 9 is inserted into one of the embedded positions 402 under the action of the second elastic member 10. Since the limiting column 9 abuts against the stopper 403, the position of the turntable 4 can be stably limited, the turntable 4 is prevented from accidentally rotating due to vibration or external force, the linkage accuracy of the turntable 4 and the bracket 2 is ensured when the motor 11 is driven, and the rearview mirror is prevented from rotating automatically due to external force (such as wind) after being automatically folded into place. In the manual folding field mode, the bracket 2 is separated from the inclined end face of the limiting groove 401 of the turntable 4 by the limiting protrusion, and the bracket 2 can rotate relative to the turntable 4; but the turntable 4 still needs to follow the partial rotation of the bracket 2 (to achieve the folding angle adjustment). At this time, the limiting column 9 cooperates with the inclined guide part 404 of the embedded position 402 to guide the turntable 4 to rotate. When the turntable 4 rotates, the end of the limiting column 9 will slide along the inclined surface of the inclined guide part 404 (due to the action of the second elastic member 10, the limiting member can move toward the positioning hole 102). The inclined surface design of the inclined guide part 404 can convert the rotational friction of the turntable 4 into axial pressure on the limiting column 9 (compressing the second elastic member 10), reducing the resistance during manual bending.

[0039] The driving mechanism includes a motor 11, a driven worm 12, and an active worm 13 linked to the output end of the motor 11. A driven turbine 14 linked to the active worm 13 is installed on the driven worm 12. The driven worm 12 is linked to an output turbine 15, and the output turbine 15 is linked to the turntable 4. The mounting frame 1 is detachably connected with a limit plate 16. The limit plate 16 is respectively provided with a group of guide columns 1601 at both ends corresponding to the driven worm 12. The lower end of the guide column 1601 is provided with an upper spherical groove 1602. The mounting frame 1 is provided with a lower spherical groove 103 corresponding to each group of guide columns 1601. A steel ball 17 is provided between each group of guide columns 1601 and the lower spherical groove 103. The steel ball 17 is provided with a second plug hole, and the end of the driven worm 12 is inserted into the second plug hole. The motor 11 drives the turntable 4 to rotate through the active worm 13, the driven turbine 14, the driven worm 12, and the output turbine 15, thereby realizing automatic control of the rearview mirror folding. The steel ball 17 is placed between the upper and lower spherical grooves 103 to form a hinge. After the end of the driven worm 12 is inserted into the second insertion hole of the steel ball 17, the two ends of the driven worm 12 are in a rotating form, which not only realizes force transmission, but also reduces wear.

[0040] The working principle of the first embodiment is as follows:

[0041] Automatic folding mode: The motor 11 starts, driving the active worm 13 to rotate, driving the driven turbine 14 to rotate. The driven turbine 14 drives the driven worm 12 to rotate, and the driven worm 12 drives the turntable 4 to rotate through the output turbine 15. Both ends of the driven worm 12 form a "ball hinge connection" through steel balls 17 (placed between the upper spherical groove 1602 and the lower spherical groove 103), reducing frictional losses. When the turntable 4 rotates, the groove wall of its limit groove 401 pushes the limit protrusion 201 of the bracket 2, forcing the bracket 2 to rotate synchronously. The inclined end faces of the limit groove 401 / limit protrusion 201 remain in a clamped state at this time, without axial displacement. The bracket 2 drives the upper connecting gasket 5 to rotate (realized by inserting the first protrusion 502 into the first jack 202 of the bracket 2). The upper connecting gasket 5 fits with the second plane 501 of the connecting shaft 3 through the first plane 301, driving the connecting shaft 3 to rotate coaxially. During this process, there is no axial movement between the bracket 2 and the upper connecting gasket 5, and the first elastic member 6 is not compressed. When the bracket 2 rotates to the limit angle, the end of the fan-shaped groove 701 of the lower limit gasket 7 contacts the column 101 of the bracket 2, forming a hard stop.

[0042] Manual folding mode: Manually push the bracket 2, and the limit protrusion 201 slides along the inclined end face of the limit groove 401. The bracket 2 drives the upper connecting gasket 5 to move axially along the connecting shaft 3, compressing the first elastic member 6, so that the limit protrusion 201 disengages from the limit groove 401. After disengaging the clamping, the bracket 2 can rotate freely relative to the turntable 4 (not restricted by the self-locking of the worm and gear). The turntable 4 realizes limited rotation through the cooperation of the embedded position 402 and the limit post 9. The limit post 9 slides along the inclined guiding part 404 of the embedded position 402, compressing the second elastic member 10 to reduce the operating resistance. When the bracket 2 rotates, the upper connecting gasket 5 follows and moves axially and continuously compresses the first elastic member 6. The upper connecting gasket 5 drives the connecting shaft 3 to rotate coaxially through plane fitting, reducing the wear between the bracket 2 and the connecting shaft 3. When the bracket 2 rotates to the limit position, the end of the fan-shaped groove 701 of the lower limit gasket 7 contacts the column 101 to avoid excessive folding. After the external force is withdrawn, the first elastic member 6 releases its elastic force, pushing the upper connecting gasket 5 and the bracket 2 to axially reset. The limit protrusion 201 slides back into the limit groove 401 along the inclined end face, restoring the clamped state. The second elastic member 10 pushes the limit post 9 back into the embedded position 402 to ensure the accurate position of the turntable 4 and avoid affecting the transmission of the driving mechanism.

[0043] Compared with the first embodiment, the second embodiment differs only in that: the linkage structure of the second embodiment includes a first plane 301 arranged on the outer periphery of the connecting shaft 3, the first plane 301 is arranged along the axial direction parallel to the connecting shaft 3, the bracket 2 is provided with a first mounting hole 203 sleeved on the outer periphery of the connecting shaft 3, the inner periphery of the first mounting hole 203 is provided with a third plane in contact with the first plane 301, the outer periphery of the connecting shaft 3 is sleeved with a first elastic member 6, one end of the first elastic member 6 is abutted and connected with the upper end of the connecting shaft 3, and the other end is abutted and connected with the bracket 2. The bracket 2 is provided with a first plug hole 202, and the upper connecting gasket 5 is provided with a first protrusion 502 inserted into the first plug hole 202. When the bracket 2 rotates, the upper connecting gasket 5 is driven to rotate synchronously through the first protrusion 502, and the upper connecting gasket 5 will follow the bracket 2 to move along the axial direction of the connecting shaft 3, so that the first elastic member 6 will be released by squeezing. The rest of the structure of the second embodiment is the same as that of the first embodiment.

[0044] In the automatic folding mode, the driving mechanism controls the rotation of the turntable 4, and drives the bracket 2 to rotate synchronously through the "limiting groove 401 / limiting protrusion 201". The bracket 2 drives the connecting shaft 3 to rotate synchronously through the first plane 301 and the third plane (in this process, the bracket 2 will not move along the axial direction of the connecting shaft 3) until the unfolding or folding state. In the manual folding mode, the bracket 2 is pushed by hand. Since the arc direction of the limiting groove 401 and the limiting protrusion is inclined at both ends (similar to the "wedge" or "slope" structure), when the human hand acts on the bracket 2, the inclined end face of the limiting protrusion will slide along the inclined end face of the limiting groove 401. At this time, the bracket 2 drives the connecting shaft 3 to rotate coaxially through the first plane 301 and the third plane, and the bracket 2 squeezes the first elastic member 6, and the bracket 2 is slightly displaced along the axial direction of the connecting member (i.e., the rotation axis direction of the rearview mirror), so that the limiting protrusion is out of the clamping state with the limiting groove 401. After the limiting protrusion is separated from the limiting groove 401, the bracket 2 can rotate freely relative to the turntable 4, and the rear-view mirror can be folded by manual bending, avoiding the risk of damage to the driving mechanism caused by the locking of the turntable 4 (self-locking of the worm gear) when directly bending.

[0045] Working principle of the second embodiment:

[0046] Automatic folding mode: The motor 11 starts, driving the active worm 13 to rotate, driving the driven turbine 14 to rotate. The driven turbine 14 drives the driven worm 12 to rotate, and the driven worm 12 drives the turntable 4 to rotate through the output turbine 15. When the turntable 4 rotates, the groove wall of its limit groove 401 pushes the limit projection 201 of the bracket 2, forcing the bracket 2 to rotate synchronously. The inclined end faces of the limit groove 401 and the limit projection 201 are kept in close engagement without axial displacement. The bracket 2 is in contact with the first plane 301 of the connecting shaft 3 through the third plane of the first mounting hole 203, directly driving the connecting shaft 3 to rotate coaxially. During this process, the bracket 2 does not move axially, and the first elastic member 6 is not compressed. When the bracket 2 rotates to the limit angle, the end of the fan-shaped groove 701 of the lower limit gasket 7 contacts the column 101 of the bracket 2, forming a hard stop.

[0047] Manual folding mode: A person pushes the bracket 2, and the limit projection 201 slides along the inclined end face of the limit groove 401. The bracket 2 moves axially along the connecting shaft 3, compressing the first elastic member 6, and the limit projection 201 disengages from the clamped state of the limit groove 401. After disengaging the clamping, the bracket 2 can rotate freely relative to the turntable 4 (not restricted by the self-locking of the worm and gear). The turntable 4 realizes limited rotation through the cooperation of the embedded position 402 and the limit post 9. The limit post 9 slides along the inclined guiding portion 404 of the embedded position 402, compressing the second elastic member 10 to reduce the operating resistance. The inclined guiding portion 404 converts the rotational friction force into an axial pressure to avoid hard collision. When the bracket 2 rotates, it continues to drive the connecting shaft 3 to rotate coaxially through the contact of the first plane 301 and the third plane. When the bracket 2 rotates to the limit position, the end of the fan-shaped groove 701 of the lower limit gasket 7 contacts the column 101 to prevent excessive folding. After the external force is withdrawn, the first elastic member 6 releases its elastic force, pushing the bracket 2 to axially reset. The limit projection 201 slides back along the inclined end face into the limit groove 401 to resume the clamping. The second elastic member 10 pushes the limit post 9 to re-engage with the stop portion 403 of the embedded position 402 to calibrate the position of the turntable 4.

[0048] Compared with the second embodiment, the difference in the third embodiment is only that: in addition to all the features of the second embodiment, the linkage structure further includes an upper connecting gasket 5 sleeved on the outer periphery of the connecting shaft 3. The inner periphery of the upper connecting gasket 5 is provided with a second plane 501 that fits the first plane 301, and the upper connecting gasket 5 is linked with the bracket 2. The bracket 2 is provided with a first jack 202, and the upper connecting gasket 5 is provided with a first projection 502 inserted into the first jack 202. When the bracket 2 rotates, it drives the upper connecting gasket 5 to rotate synchronously through the first projection 502, and the upper connecting gasket 5 will follow the bracket 2 to move axially along the connecting shaft 3, thereby squeezing and releasing the first elastic member 6.

[0049] The upper connection gasket 5 replaces the bracket 2 to coaxially link or axially slide with the connecting shaft 3, thereby reducing the wear between the connecting shaft 3 and the bracket 2. In this scheme, in the manual folding mode, the bracket 2 is pushed by hand. Since both ends of the arc direction of the limiting groove 401 and the limiting protrusion are inclined (similar to a "wedge" or "slope" structure), when the human hand acts on the bracket 2, the inclined end surface of the limiting protrusion will slide along the inclined end surface of the limiting groove 401. At this time, the bracket 2 not only drives the connecting shaft 3 to rotate coaxially through the first plane 301 and the third plane, but also drives the upper connection gasket 5 to rotate coaxially. The upper connection gasket 5 drives the connecting shaft 3 to rotate coaxially through the first plane 301 and the second plane 501. At the same time, the upper connection gasket 5 will squeeze the first elastic member 6, and the bracket 2 and the upper connection gasket 5 will both be slightly displaced along the axial direction of the connecting member (i.e., the direction of the rotation axis of the rearview mirror), so that the limiting protrusion is out of the clamping state with the limiting groove 401. After the limiting protrusion is separated from the limiting groove 401, the bracket 2 can rotate freely relative to the turntable 4, that is, the rear-view mirror can be folded by manual bending, avoiding the risk of damage to the drive mechanism caused by the locking of the turntable 4 (self-locking of the worm gear) when directly bending. Among them, the upper connecting gasket 5 replaces the bracket 2 and the connecting shaft 3 to perform coaxial linkage or axial sliding, reducing the wear between the connecting shaft 3 and the bracket 2.

[0050] Working principle of embodiment 3:

[0051] Automatic folding mode: The motor 11 starts, drives the active worm 13 to rotate, drives the driven turbine 14 to rotate, the driven turbine 14 drives the driven worm 12 to rotate, and the driven worm 12 drives the turntable 4 to rotate through the output turbine 15. When the turntable 4 rotates, the groove wall of its limiting groove 401 pushes the limiting protrusion 201 of the bracket 2, forcing the bracket 2 to rotate synchronously. The bracket 2 fits the first plane 301 of the connecting shaft 3 through the third plane of the first mounting hole 203, directly driving the connecting shaft 3 to rotate coaxially. The bracket 2 drives the upper connecting gasket 5 to rotate through the first protrusion 502, and the upper connecting gasket 5 fits the first plane 301 of the connecting shaft 3 through the second plane 501, driving the connecting shaft 3 to rotate synchronously. In this process, there is no axial movement between the bracket 2 and the upper connecting gasket 5, and the first elastic member 6 is not compressed. When the bracket 2 rotates to the limit angle, the end of the fan-shaped groove 701 of the lower limiting gasket 7 contacts the column 101 of the bracket 2, forming a hard block.

[0052] Manual folding mode: The user manually pushes the bracket 2, and the limit bump 201 slides along the inclined end face of the limit groove 401. The bracket 2 and the upper connecting gasket 5 move axially along the connecting shaft 3, compressing the first elastic member 6, and the limit bump 201 is disengaged from the clamped state of the limit groove 401. After disengagement, the bracket 2 can rotate freely relative to the turntable 4 (not restricted by the self-locking of the worm and worm gear). The turntable 4 cooperates with the limit post 9 through the embedded position 402: The limit post 9 slides along the inclined guiding portion 404 of the embedded position 402, compressing the second elastic member 10 to reduce the operating resistance. The bracket 2 drives the connecting shaft 3 to rotate by fitting the third plane with the first plane 301. The upper connecting gasket 5 drives the connecting shaft 3 to rotate by synchronously transmitting the torque by fitting the second plane 501 with the first plane 301. The bracket 2 and the upper connecting gasket 5 continuously compress the first elastic member 6 to achieve flexible displacement. When the bracket 2 rotates to the limit position, the end of the sector groove 701 of the lower limit gasket 7 contacts the column 101 to prevent excessive folding. After the external force is withdrawn, the first elastic member 6 releases its elastic force, pushing the bracket 2 and the upper connecting gasket 5 to axially reset, and the limit bump 201 slides back along the inclined end face into the limit groove 401 to restore the clamped state. The second elastic member 10 pushes the limit post 9 to re-engage with the stop portion 403 of the embedded position 402 to calibrate the position of the turntable 4.

Claims

1. A folding rearview mirror for a motor vehicle, comprising a connecting shaft, a mounting bracket and a support bracket sleeved on the outer periphery of the connecting shaft. The support bracket and the mounting bracket are arranged in sequence along the axial direction of the connecting shaft. A turntable rotatably arranged on the mounting bracket is provided between the mounting bracket and the support bracket. The turntable is linked with a driving mechanism capable of driving the turntable to rotate. A plurality of groups of limiting grooves are provided on one side of the turntable facing the support bracket. A group of matching limiting protrusions are provided on the support bracket corresponding to each group of limiting grooves. Both ends of the limiting grooves and the limiting protrusions along their arc directions are inclined. It is characterized in that: A linkage structure is provided between the connecting shaft and the bracket, and the connecting shaft is kept coaxial with the bracket through the linkage structure for rotation.

2. The motor vehicle folding rearview mirror according to claim 1, wherein: The linkage structure includes an upper connecting gasket sleeved on the outer periphery of the connecting shaft. A first plane is arranged on the outer periphery of the connecting shaft along the axial direction of the connecting shaft. A second plane that fits with the first plane is arranged on the inner periphery of the upper connecting gasket. The upper connecting gasket is linked with the bracket. A first elastic member is sleeved on the outer periphery of the connecting shaft. One end of the first elastic member is in contact connection with the upper end of the connecting shaft, and the other end is in contact connection with the upper connecting gasket.

3. The folding rearview mirror for a motor vehicle according to claim 1, characterized in that: The linkage structure includes a first plane arranged on the outer periphery of the connecting shaft. The first plane is arranged parallel to the axial direction of the connecting shaft. A first mounting hole sleeved on the outer periphery of the connecting shaft is provided on the bracket. A third plane that fits with the first plane is arranged on the inner periphery of the first mounting hole. A first elastic member is sleeved on the outer periphery of the connecting shaft. One end of the first elastic member is in contact connection with the upper end of the connecting shaft, and the other end is in contact connection with the bracket.

4. The motor vehicle folding rearview mirror according to claim 3, wherein: The linkage structure further includes an upper connecting gasket sleeved on the outer periphery of the connecting shaft. A second plane that fits with the first plane is arranged on the inner periphery of the upper connecting gasket. The upper connecting gasket is linked with the bracket.

5. The folding rearview mirror for a motor vehicle according to claim 2 or 4, characterized in that: A first jack is provided on the bracket, and a first convex block inserted into the first jack is provided on the upper connecting gasket.

6. The motor vehicle folding rearview mirror according to any one of claims 2 to 4, characterized in that: A lower limit gasket that rotates coaxially with the connecting shaft is sleeved on the connecting shaft. A sector-shaped groove is arranged on the outer edge of the lower limit gasket. A column corresponding to the sector-shaped groove is provided on the mounting frame, and the column is inserted into the sector-shaped groove.

7. The folding rearview mirror for a motor vehicle according to claim 6, characterized in that: A lower connecting hole sleeved on the outer periphery of the connecting shaft is provided in the middle of the lower limit gasket. A fourth plane that fits with the first plane is arranged on the inner wall of the lower connecting hole. An annular groove is further arranged on the outer periphery of the connecting shaft, and a stop gasket is clamped at the annular groove. The lower limit gasket is distributed between the stop gasket and the mounting frame.

8. The folding rearview mirror of a motor vehicle according to claim 1, characterized in that: Several groups of embedded positions are provided on one side of the turntable facing the mounting frame. A stop portion is formed at one end of each embedded position, and an inclined guiding portion extending along the arc direction is formed at the other end. A group of positioning holes corresponding to each group of embedded positions are provided on the mounting frame. A limiting post and a second elastic member are arranged at the positioning holes. One end of the second elastic member is in contact connection with the inner end of the positioning hole, and the other end is in contact connection with the limiting post. The limiting post is placed in a group of embedded positions under the push of the elastic limiting member.

9. The motor vehicle folding rearview mirror according to claim 1, characterized in that: The driving mechanism includes a motor, a driven worm, and a driving worm linked to the output end of the motor. A driven turbine linked to the driving worm is installed on the driven worm. The driven worm is linked with an output turbine, and the output turbine is linked with the turntable. A limiting plate is detachably connected to the mounting frame. A group of guiding columns are respectively arranged at both ends of the driven worm corresponding to the limiting plate. An upper spherical surface groove is arranged at the lower end of each guiding column. A lower spherical surface groove corresponding to each group of guiding columns is provided on the mounting frame. Steel balls are arranged between each group of guiding columns and the lower spherical surface grooves. A second jack is provided on each steel ball, and the end of the driven worm is inserted into the second jack.

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