Low resistance folding mirror assembly

Abstract

The utility model provides a rear -view mirror low resistance folding device, including the pivot of upper end is equipped with the shaft shoulder, the pivot lower extreme passes in proper order folding base, rotation base back and base fixed, the shaft shoulder lower surface to the pivot on folding base upper surface direction in proper order is equipped with clutch spring, upper wear -resisting ring, gear ring, ring of pushing, the rotation base upper surface to the pivot on folding base lower surface direction in proper order is equipped with the spring of lifting, lower wear -resisting ring, folding base is equipped with the motor of making folding base relative gear ring rotation. The utility model has can effectively reduce the rotating resistance, reduces the gap between the rotating structure after rotating and unfolding in place and reduces the wind noise, reserves the clearance space for the gap between the rotating structure in the folding state, has the advantages of convenient maintenance and maintenance.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts, specifically to a low-resistance folding device for rearview mirrors. Background Technology

[0002] Existing traditional rearview mirror modules include a base connected to the vehicle body or door, a rotating shaft fixedly connected to the base, and a rotating base and a folding base arranged sequentially from bottom to top, all fitted around the rotating shaft. The folding base contains a drive motor and components such as a gear ring and a pressure-holding spring fitted around the rotating shaft. The pressure-holding spring provides downward pressure to the folding base and rotating base, allowing the upper clutch slider at the lower end of the rotating base to engage and disengage with the lower clutch slider of the base at a fixed angle. This ensures that when the rearview mirror folds inward or outward due to external impact, the upper and lower clutch sliders can be offset by their inclined surfaces to achieve rotation, preventing the rearview mirror from breaking. When the rearview mirror is normally folded and unfolded, the motor drives the folding base to rotate relative to the rotating base. Due to the pressure of the pressure-holding spring, the folding base experiences significant resistance when rotating relative to the rotating base. Over time, dust and dirt can easily cause problems such as jamming during rotation. Utility Model Content

[0003] Based on the above problems, the purpose of this utility model is to provide a low-resistance rearview mirror folding device that can effectively reduce rotational resistance, reduce the gap between the rotating structures and reduce wind noise after the rotation is fully extended, and reserve cleaning space between the gaps between the rotating structures in the folded state, so as to facilitate maintenance.

[0004] To address the above problems, the following technical solution is provided: A low-resistance folding device for a rearview mirror includes a rotating shaft with a shoulder at its upper end. The lower end of the rotating shaft passes through a folding base and a rotating base in sequence and is fixed to a base. A clutch spring, an upper wear-resistant ring, a gear ring, and a lever ring are sequentially fitted onto the rotating shaft from the lower surface of the shoulder towards the upper surface of the folding base. A lifting spring and a lower wear-resistant ring are sequentially fitted onto the rotating shaft from the upper surface of the rotating base towards the lower surface of the folding base. The folding base is equipped with a motor that rotates the folding base relative to the gear ring. The lower surface of the gear ring has a downwardly extending lever and an upwardly recessed unlocking groove. The lever and unlocking groove are multiple and spaced apart along the circumferential direction of the gear ring. The upper surface of the lever ring has an upwardly protruding unlocking block that corresponds to and matches the unlocking groove. The inner ring wall of the lever ring has a number of lifting sliders spaced apart along its circumferential direction. A lifting ramp is provided at the junction of the bottom surface of the lifting slider and the side corresponding to the unfolding direction of the folding base; the lower surface of the folding base is provided with a plurality of locking grooves spaced apart along its circumferential direction; the upper surface of the rotating base is provided with a locking block adapted to the locking groove, and a support cylinder located inside the locking block, passing through the lifting spring, the lower wear-resistant ring, and the folding base; the outer wall of the support cylinder is provided with a lifting groove opened from top to bottom; a lifting ramp is provided at the junction of the bottom of the lifting groove and the groove wall corresponding to the unfolding direction of the folding base; the lever is located in the lifting groove; the lifting slider is located between the lever and the groove wall on the side of the lifting groove with the lifting ramp, and the lifting ramp and the lifting ramp are adapted to each other; the lower end of the clutch spring pushes the upper wear-resistant ring and the toothed ring downward and applies the elastic force to the bottom of the lifting groove through the lever; the lifting spring pushes the lower wear-resistant ring to abut against the lower surface of the folding base.

[0005] The present invention is further configured such that: the base facing the rotating base is provided with a lower clutch slider spaced apart along its circumferential direction; the rotating base facing the base is provided with an upper clutch slider spaced apart along its circumferential direction; both ends of the upper clutch slider and both ends of the lower clutch slider in the circumferential direction are provided with clutch inclined surfaces; the upper end of the clutch spring pushes the shoulder upward to lift the base located at the lower end of the rotating shaft, and the lower end of the clutch spring pushes the upper wear-resistant ring and the gear ring downward to make the rotating base descend and fit tightly against the base; the lower clutch slider is guided and locked between adjacent upper clutch sliders by the clutch inclined surfaces.

[0006] The present invention is further configured such that the motor output shaft is provided with a driving worm; the folding base is also provided with a driven worm that meshes with a gear ring, and the driven worm is provided with a worm wheel adapted to the driving worm.

[0007] The present invention is further configured such that the lifting spring is a butterfly spring, the inner ring of which is higher than the outer ring, the outer ring of which is provided with an outer positioning groove for the locking block to pass through and to provide circumferential positioning for the butterfly spring, and the inner ring is provided with an inner positioning groove; the lower surface of the lower wear-resistant ring is provided with an anti-rotation protrusion that fits into the inner positioning groove.

[0008] The present invention is further configured such that the unlocking groove is fan-shaped along the circumferential direction of the gear ring, and the two ends of the fan-shaped direction are provided with guide slopes; the unlocking block is fan-shaped along the circumferential direction of the dial ring, and the two ends of the fan-shaped direction are provided with guide slopes.

[0009] The present invention is further configured such that: the lower surface of the dial ring is provided with an anti-bend block that protrudes downward in a fan shape along its circumferential direction; the anti-bend block is provided with an anti-bend upper inclined surface on one side corresponding to the unfolding direction of the folding base; the upper surface of the folding base is provided with an anti-bend groove that protrudes downward in a fan shape along its circumferential direction; the anti-bend groove is provided with an anti-bend lower inclined surface on one side corresponding to the unfolding direction of the folding base; when the folding base is folded, the anti-bend block slides in a fan shape within the anti-bend groove; there are multiple sets of anti-bend blocks and anti-bend grooves, evenly distributed along the circumferential direction of the dial ring.

[0010] The present invention is further configured such that the outer wall of the base is provided with a first positioning member spaced apart along the circumferential direction of the folding base; the folding base is provided with a second positioning member adapted to the first positioning member and limiting its rotation angle range.

[0011] The present invention is further configured such that the folding base also includes a lens holder.

[0012] The present invention is further configured such that, in the unfolded state of the folding base, the unlocking block abuts against the lower surface of the toothed ring, and the dial ring presses down on the folding base to bring it close to / fit against the rotating base. At this time, the lower wear-resistant ring moves down and compresses the lifting spring; and the locking block is embedded in the locking groove to constrain the circumferential degree of freedom between the two. S1. When the motor is powered on, the folding begins. The gear ring is under stress and rotates clockwise relative to the rotating base. The paddle moves clockwise and pushes the lifting slider to rotate the dial ring clockwise. At this time, the lifting slope contacts the supporting slope. At the same time, the unlocking block begins to unlock in accordance with the unlocking slot, providing upward space for the dial ring to be inserted into the subsequent upward movement. S2. As the gear ring rotates clockwise relative to the rotating base, the lifting slider moves upward along the lifting slope under the push of the paddle, and the paddle ring moves upward and fits with the gear ring. At this time, the lifting spring pushes the folding base upward through the lower wear-resistant ring to separate the folding base from the rotating base and reduce friction. At the same time, the locking block disengages from the locking groove to unlock the circumferential degree of freedom between the folding base and the rotating base. S3. As the gear ring rotates clockwise relative to the rotating base, the paddle, unlocking block, and lifting groove form a rigid contact. At this time, the folding base begins to rotate counterclockwise under the drive of the reverse force until it is folded in place. S4. When the folded position is in place, the top of the locking block and the bottom of the folding base are supported to create an upward gap between the folding base and the rotating base.

[0013] The present invention is further configured such that when the motor is powered on and begins to unfold the folding base in the folded state, the folding base is subjected to reverse force by the gear ring and rotates clockwise; when the folding base is unfolded to the correct position, the locking block realigns with the locking groove to leave axial space for the folding base to fall. At this time, the end face of the anti-folding groove abuts against the end face of the anti-folding block, forcing the folding base to drive the dial ring to generate a clockwise rotation torque. Since the lifting slider is constrained by the lifting groove, the gear ring is forced to rotate counterclockwise. At this time, the circumferential angle difference generated by the gear ring and the dial ring causes the unlocking block to slide out of the unlocking groove. The dial ring moves downward and pushes the folding base to fall, and the locking block engages with the locking groove for positioning. At this time, the unfolding is completed and the positioning state is entered.

[0014] The beneficial effects of this utility model are: 1. By raising the folding base when folding, the friction between the folding base and the rotating base is reduced, thereby reducing rotational resistance; at the same time, when unfolded, the folding base and the rotating base are close to each other, which can effectively reduce gaps and reduce wind noise. 2. When encountering an impact, the upper clutch slider can climb up the clutch ramp to above the lower clutch slider and compress the clutch spring, forcing the folding base and the rotating base to rotate together to relieve the force; 3. The disc spring has the advantage of a high compression ratio, and it is also convenient to circumferentially constrain the lower wear ring, so that the lower wear ring can make good fit contact with the folding base when the folding base rotates. 4. The upward gap formed when folded makes cleaning and maintenance easier and also reduces friction when unfolded. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention in conjunction with a lens holder.

[0016] Figure 2 This is a three-dimensional structural diagram of the lens holder in the separated state of this utility model.

[0017] Figure 3 This is a first-view perspective three-dimensional structural diagram of the base and rotating base of this utility model in their separated state.

[0018] Figure 4 This is a second-view perspective three-dimensional structural diagram of the base and rotating base of this utility model in a separated state.

[0019] Figure 5 This is a full-section three-dimensional structural diagram of the present invention.

[0020] Figure 6 This utility model Figure 5 A magnified schematic diagram of the three-dimensional structure.

[0021] Figure 7 This is a first-view perspective three-dimensional structural diagram of the base, rotating base, and folding base of this utility model in their separated states.

[0022] Figure 8 This is a second-view three-dimensional structural diagram of the base, rotating base, and folding base of this utility model in their separated states.

[0023] Figure 9 This utility model Figure 7 A schematic diagram of the full sectional three-dimensional structure.

[0024] Figure 10 This utility model Figure 8 A schematic diagram of the full sectional three-dimensional structure.

[0025] Figure 11 This is a first-person perspective three-dimensional structural diagram of the present invention in the form of an explosion.

[0026] Figure 12 This is a two-dimensional structural diagram of the explosion from a second perspective of the present invention.

[0027] Figure 13 This utility model Figure 11 A schematic diagram of the full sectional three-dimensional structure.

[0028] Figure 14 This utility model Figure 12 A schematic diagram of the full sectional three-dimensional structure.

[0029] Figure 15 This is a partial cross-sectional view of the unfolded folding base of this utility model.

[0030] Figure 16 This is a second partial cross-sectional view of the unfolded folding base of this utility model.

[0031] Figure 17 This is a partial cross-sectional view of the rotating ring of this utility model.

[0032] Figure 18 This is a partial cross-sectional view of the rotating ring of this utility model.

[0033] Figure 19 This is a partial cross-sectional view of the first part of the rotating ring in the rising state of this utility model.

[0034] Figure 20 This is a partial cross-sectional view of the dial ring in the rising state of this utility model.

[0035] Figure 21 This is a first-view three-dimensional structural diagram of the gear ring and derailleur ring in their mating state according to this utility model.

[0036] Figure 22 This is a second-view three-dimensional structural diagram of the gear ring and derailleur ring in the mating state of this utility model.

[0037] Figure 23 This is a three-dimensional structural diagram of the gear ring, dial ring, and rotating base of this utility model in an exploded state.

[0038] The labels in the diagram mean: 10-shaft; 11-shoulder; 20-folding base; 21-locking groove; 22-anti-folding groove; 221-anti-folding lower slope; 23-second positioning component; 24-outer cover; 30-rotating base; 31-locking block; 32-support cylinder; 321-lifting groove; 322-lifting slope; 33-upper clutch slider; 40-base; 41-lower clutch slider; 42-first positioning component; 50-clutch spring; 51-upper wear-resistant ring; 52-lifting spring; 521-inner ring; 522- Outer ring; 523-Outer positioning groove; 524-Inner positioning groove; 53-Lower wear-resistant ring; 531-Anti-rotation protrusion; 54-Motor; 541-Driving worm gear; 55-Clutch inclined plane; 56-Driven worm gear; 561-Worm wheel; 57-Guide inclined plane; 58-Locking inclined plane; 60-Gear ring; 61-Pulley; 62-Unlocking groove; 70-Pulley ring; 71-Unlocking block; 72-Lifting slider; 721-Lifting inclined plane; 73-Anti-bending block; 731-Anti-bending upper inclined plane; 80-Lens holder; 90-Lifting clearance. Detailed Implementation

[0039] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0040] Note: Due to the interlocking structure of the gear ring 60, derailleur ring 70, and rotating base 30, it is not easily shown visually in the attached diagram. For ease of understanding, Figure 15 , Figure 17 , Figure 19 The dial ring 70 is hidden, and only the position of its unlocking block 71 is shown.

[0041] refer to Figures 1 to 23 ,like Figures 1 to 23The rearview mirror low-resistance folding device shown includes a rotating shaft 10 with a shoulder 11 at its upper end. The lower end of the rotating shaft 10 passes through a folding base 20 and a rotating base 30 in sequence and is fixed to a base 40. A clutch spring 50, an upper wear-resistant ring 51, a gear ring 60, and a derailleur ring 70 are sequentially fitted onto the rotating shaft 10 from the lower surface of the shoulder 11 toward the upper surface of the folding base 20. A lifting spring 52 and a lower wear-resistant ring 53 are sequentially fitted onto the rotating shaft 10 from the upper surface of the rotating base 30 toward the lower surface of the folding base 20. The folding base 20 is provided with... A motor 54 is provided to rotate the folding base 20 relative to the gear ring 60; the lower surface of the gear ring 60 is provided with a downwardly extending paddle 61 and an upwardly recessed unlocking groove 62, and there are several paddles 61 and unlocking grooves 62, which are spaced apart along the circumferential direction of the gear ring 60; the upper surface of the dial ring 70 is provided with an upwardly protruding unlocking block 71 that corresponds to and matches the unlocking groove 62; the inner ring wall of the dial ring 70 is provided with several lifting sliders 72 spaced apart along its circumferential direction, and the bottom surface of the lifting sliders 72 is aligned with the unfolding direction of the folding base 20 (i.e., top view). A lifting ramp 721 is provided at the junction of the two sides (clockwise direction of the angle); the lower surface of the folding base 20 is provided with a plurality of locking grooves 21 spaced apart along its circumferential direction; the upper surface of the rotating base 30 is provided with a locking block 31 adapted to the locking groove 21, and a support cylinder 32 located inside the locking block 31, passing through the lifting spring 52, the lower wear-resistant ring 53, and the folding base 20. The outer wall of the support cylinder 32 is provided with a lifting groove 321 opened from top to bottom. The bottom of the lifting groove 321 is aligned with the unfolding direction of the folding base 20 (i.e., the angle is clockwise direction of the angle ... A lifting ramp 322 is provided at the junction of the groove wall on one side (clockwise direction from a top view). The paddle 61 is located inside the lifting groove 321. The lifting slider 72 is located between the paddle 61 and the groove wall on the side of the lifting groove 321 where the lifting ramp 322 is provided, and the lifting ramp 322 and the lifting ramp 721 are adapted to each other. The lower end of the clutch spring 50 pushes the upper wear-resistant ring 51 and the toothed ring 60 downward and applies the elastic force to the bottom of the lifting groove 321 through the paddle 61. The lifting spring 52 pushes the lower wear-resistant ring 53 to abut against the lower surface of the folding base 20.

[0042] In the above structure, by raising the folding base 20 when folding, the friction between the folding base 20 and the rotating base 30 is reduced, thereby reducing the rotational resistance; at the same time, when unfolded, the folding base 20 and the rotating base 30 are close to each other, which can effectively reduce gaps and reduce wind noise.

[0043] In this embodiment, the base 40 facing the rotating base 30 is provided with a lower clutch slider 41 spaced apart along its circumferential direction; the rotating base 30 facing the base 40 is provided with an upper clutch slider 33 spaced apart along its circumferential direction; both ends of the upper clutch slider 33 and both ends of the lower clutch slider 41 in the circumferential direction are provided with clutch inclined surfaces 55; the upper end of the clutch spring 50 pushes the shoulder 11 upward to lift the base 40 located at the lower end of the rotating shaft 10, and the lower end of the clutch spring 50 pushes the upper wear-resistant ring 51 and the gear ring 60 downward to make the rotating base 30 descend and fit tightly against the base 40; the lower clutch slider 41 is guided and locked between the adjacent upper clutch slider 33 by the clutch inclined surface 55.

[0044] In the above structure, when an impact occurs, the upper clutch slider 33 can climb up along the clutch ramp 55 to above the lower clutch slider 41 and compress the clutch spring 50 to force the folding base 20 and the rotating base 30 to rotate together to relieve the force.

[0045] In this embodiment, the output shaft of the motor 54 is provided with a driving worm 541; the folding base 20 is also provided with a driven worm 56 that meshes with the gear ring 60, and the driven worm 56 is provided with a worm wheel 561 that is adapted to the driving worm 541.

[0046] In the above structure, torque is increased by deceleration, effectively avoiding jamming.

[0047] In this embodiment, the lifting spring 52 is a butterfly spring, with its inner ring 521 being higher than its outer ring 522. The outer ring 522 of the butterfly spring is provided with an outer positioning groove 523 for the locking block 31 to pass through and for providing circumferential positioning for the butterfly spring, and the inner ring 521 is provided with an inner positioning groove 524. The lower wear-resistant ring 53 has an anti-rotation protrusion 531 on its lower surface that engages with the inner positioning groove 524.

[0048] In the above structure, the disc spring has the advantage of a high compression ratio, and it also facilitates circumferential constraint on the lower wear ring 53, so that the lower wear ring 53 can make good fit contact with the folding base 20 when the folding base 20 rotates.

[0049] In this embodiment, the unlocking groove 62 is fan-shaped along the circumferential direction of the gear ring 60, and guide slopes 57 are provided at both ends of the fan-shaped direction; the unlocking block 71 is fan-shaped along the circumferential direction of the dial ring 70, and guide slopes 57 are provided at both ends of the fan-shaped direction.

[0050] In the above structure, both the unlocking groove 62 and the unlocking block 71 are provided with guide slopes 57, which makes the transition smoother when the two are joined or separated.

[0051] In this embodiment, the lower surface of the dial ring 70 is provided with a fan-shaped anti-bend block 73 protruding downward along its circumferential direction. The anti-bend block 73 is provided with an anti-bend upper inclined surface 731 on one side corresponding to the unfolding direction of the folding base 20. The upper surface of the folding base 20 is provided with an anti-bend groove 22 protruding downward along its circumferential direction. The anti-bend groove 22 is provided with an anti-bend lower inclined surface 221 on one side corresponding to the unfolding direction of the folding base 20. When the folding base 20 is folded, the anti-bend block 73 slides in a fan shape within the anti-bend groove 22. There are multiple sets of anti-bend blocks 73 and anti-bend grooves 22, which are evenly distributed along the circumferential direction of the dial ring 70.

[0052] In the above structure, the anti-bending block 73 and the anti-bending groove 22 are preferably three groups, with each group arranged at a 120-degree interval.

[0053] In this embodiment, the outer wall of the base 40 is provided with a first positioning member 42 spaced apart along the circumferential direction of the folding base 20; the folding base 20 is provided with a second positioning member 23 adapted to the first positioning member 42 and limiting its rotation angle range.

[0054] In the above structure, there are preferably two first positioning members 42, which are spaced apart from each other in the circumferential direction of the rotation of the folding base 20, and the second positioning member 23 is located between adjacent first positioning members 42 to limit the limit folding angle.

[0055] In this embodiment, the folding base 20 also includes an outer cover 24 and a lens holder 80.

[0056] In the above structure, the lens holder 80 is used to install the rearview lens (not shown in the figure); the second positioning member 23 is located on the lens holder 80.

[0057] In this embodiment, when the folding base 20 is unfolded, the unlocking block 71 abuts against the lower surface of the gear ring 60, and the dial ring 70 presses down on the folding base 20 to bring it closer to / fit against the rotating base 30. At this time, the lower wear-resistant ring 53 moves downward and compresses the lifting spring 52; and the locking block 31 is embedded in the locking groove 21 to constrain the circumferential degree of freedom between the two (refer to...). Figure 15 , Figure 16 ); S1. When the motor 54 is powered on, the folding begins. The gear ring 60 is under stress and rotates clockwise relative to the rotating base 30. The paddle 61 moves clockwise and pushes the lifting slider 72, causing the dial ring 70 to rotate clockwise. At this time, the lifting inclined surface 721 contacts the supporting inclined surface 322. Simultaneously, the unlocking block 71 begins to unlock itself in accordance with the unlocking slot 62, providing upward space for the dial ring 70 to subsequently insert upwards (see reference). Figure 17 , Figure 18 ); S2. As the gear ring 60 rotates clockwise relative to the rotating base 30, the lifting slider 72, pushed by the paddle 61, moves its lifting ramp 721 upward along the supporting ramp 322, and the paddle ring 70 moves upward and fits against the gear ring 60; at this time, the supporting spring 52 pushes the folding base 20 upward through the lower wear-resistant ring 53, causing the folding base 20 to separate from the rotating base 30 and reduce friction. Simultaneously, the locking block 31 disengages from the locking groove 21, unlocking the circumferential degree of freedom between the folding base 20 and the rotating base 30 (see reference). Figure 19 , Figure 20 ); S3. As the gear ring 60 rotates clockwise relative to the rotating base 30, the paddle 61, the unlocking block 71, and the lifting groove 321 form a rigid contact. At this time, under the drive of the reverse force, the folding base 20 begins to rotate counterclockwise until it is folded in place. S4. When the folded position is in place, the top of the locking block 31 and the bottom of the folding base 20 are supported against each other, so that an upward gap 90 is formed between the folding base 20 and the rotating base 30.

[0058] In the above structure, the upward gap 90 formed in the folded state facilitates cleaning and maintenance, and also helps to reduce friction when unfolded.

[0059] In this embodiment, when the motor 54 is powered on and the folding base 20 begins to unfold in the folded state, the folding base 20 is subjected to reverse force by the gear ring 60 and rotates clockwise (i.e., clockwise direction from a top view). When the folding base 20 is unfolded to the correct position, the locking block 31 is aligned with the locking groove 21 again to leave axial space for the folding base 20 to fall. At this time, the end face of the anti-folding groove 22 abuts against the end face of the anti-folding block 73, forcing the folding base 20 to drive the dial ring 70 to generate a clockwise rotation torque (i.e., clockwise direction from a top view). Since the lifting slider 72 is constrained by the lifting groove 321, the gear ring 60 is forced to rotate counterclockwise (i.e., counterclockwise direction from a top view). At this time, the circumferential angle difference generated by the gear ring 60 and the dial ring 70 causes the unlocking block 71 to slide out of the unlocking groove 62. The dial ring 70 moves downward and pushes the folding base 20 to fall, and the locking block 31 engages with the locking groove 21 for positioning. At this time, the unfolding is completed and the positioning state is entered.

[0060] In this embodiment, locking groove 21 and locking block 31 are provided with locking slopes 58 on both sides.

[0061] In the above structure, the locking ramp 58 engages and disengages more smoothly with the locking groove 21 and the locking block 31.

[0062] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model. These improvements and modifications assumed above should also be considered within the protection scope of the present utility model.

Claims

1. A low-drag folding device for a rearview mirror, comprising a rotating shaft with a shoulder at its upper end, the lower end of the rotating shaft passing sequentially through a folding base and a rotating base before being fixed to a base, characterized in that: A clutch spring, an upper wear-resistant ring, a gear ring, and a shift ring are sequentially fitted onto the rotating shaft from the lower surface of the shoulder towards the upper surface of the folding base; a lifting spring and a lower wear-resistant ring are sequentially fitted onto the rotating shaft from the upper surface of the rotating base towards the lower surface of the folding base; the folding base is equipped with a motor that rotates the folding base relative to the gear ring; the lower surface of the gear ring is provided with a downwardly extending shift piece and an upwardly recessed unlocking groove, and there are several shift pieces and unlocking grooves arranged at intervals along the circumferential direction of the gear ring; the upper surface of the shift ring is provided with an upwardly protruding unlocking block that corresponds to and matches the unlocking groove; the inner ring wall of the shift ring is provided with several lifting sliders arranged at intervals along its circumferential direction; the bottom surface of the lifting slider and the side corresponding to the unfolding direction of the folding base are provided with a lifting slope; the folding base is equipped with a motor that rotates the folding base relative to the upper surface of the rotating base; the lower surface of the gear ring is provided with a clutch spring, an upper wear-resistant ring, a gear ring, and a shift ring; the lower surface of the rotating base ... a shift ring; the lower surface of the rotating base is provided with a clutch spring, an upper wear-resistant ring, a gear ring, a shift ring; the lower surface of the rotating base is provided with a clutch spring, an upper wear-resistant ring, a gear ring, a shift ring; the lower surface of the rotating base is provided with a clutch spring, an upper wear-resistant ring, a shift ring; the lower surface of the rotating base is provided with a clutch spring, an upper wear-resistant ring, a shift ring; the lower surface of the rotating base is provided with The lower surface of the folding base is provided with several locking grooves spaced apart along its circumferential direction; the upper surface of the rotating base is provided with locking blocks adapted to the locking grooves, and a support cylinder located inside the locking blocks, passing through the lifting spring, the lower wear-resistant ring, and the folding base. The outer wall of the support cylinder is provided with a lifting groove opened from top to bottom. The bottom of the lifting groove and the groove wall corresponding to the unfolding direction of the folding base are provided with a lifting inclined surface. The paddle is located in the lifting groove, and the lifting slider is located between the paddle and the groove wall on the side of the lifting groove with the lifting inclined surface, and the lifting inclined surface and the lifting inclined surface are adapted to each other; the lower end of the clutch spring pushes the upper wear-resistant ring and the toothed ring downwards and applies the elastic force to the bottom of the lifting groove through the paddle; the lifting spring pushes the lower wear-resistant ring to abut against the lower surface of the folding base.

2. The low-resistance folding device for a rearview mirror according to claim 1, characterized in that: The base has a lower clutch slider spaced apart along its circumferential direction on the side facing the rotating base; the rotating base has an upper clutch slider spaced apart along its circumferential direction on the side facing the base; both ends of the upper clutch slider and both ends of the lower clutch slider in the circumferential direction are provided with clutch ramps; the upper end of the clutch spring pushes the shoulder upward to lift the base located at the lower end of the rotating shaft, and the lower end of the clutch spring pushes the upper wear-resistant ring and gear ring downward to make the rotating base descend and fit tightly against the base; the lower clutch slider is guided and locked between the adjacent upper clutch sliders by the clutch ramps.

3. The low-resistance folding device for a rearview mirror according to claim 1, characterized in that: The motor output shaft is provided with a driving worm; the folding base is also provided with a driven worm that meshes with a gear ring, and the driven worm is provided with a worm wheel that is adapted to the driving worm.

4. The low-resistance folding device for a rearview mirror according to claim 1, characterized in that: The lifting spring is a butterfly spring, with its inner ring higher than its outer ring. The outer ring of the butterfly spring has an outer positioning groove for the locking block to pass through and for providing circumferential positioning for the butterfly spring, and the inner ring has an inner positioning groove. The lower surface of the lower wear-resistant ring has an anti-rotation protrusion that fits into the inner positioning groove.

5. A low-resistance folding device for a rearview mirror according to claim 1, characterized in that: The unlocking groove is fan-shaped along the circumferential direction of the gear ring, and guide slopes are provided at both ends of the fan-shaped direction; the unlocking block is fan-shaped along the circumferential direction of the dial ring, and guide slopes are provided at both ends of the fan-shaped direction.

6. A low-resistance folding device for a rearview mirror according to claim 1, characterized in that: The lower surface of the dial ring is provided with a fan-shaped anti-bend block protruding downwards along its circumferential direction. The anti-bend block has an anti-bend upper inclined surface on one side corresponding to the unfolding direction of the folding base. The upper surface of the folding base is provided with an anti-bend groove protruding downwards in a fan shape along its circumferential direction. The anti-bend groove has an anti-bend lower inclined surface on one side corresponding to the unfolding direction of the folding base. When the folding base is folded, the anti-bend block slides in a fan shape within the anti-bend groove. There are multiple sets of anti-bend blocks and anti-bend grooves, which are evenly distributed along the circumferential direction of the dial ring.

7. A low-resistance folding device for a rearview mirror according to claim 1, characterized in that: The outer wall of the base is provided with a first positioning element that is spaced apart along the circumferential direction of the folding base; the folding base is provided with a second positioning element that is adapted to the first positioning element and limits its rotation angle range.

8. A low-resistance folding device for a rearview mirror according to claim 1, characterized in that: The folding base also includes a lens holder.

9. A low-resistance folding device for a rearview mirror according to claim 6, characterized in that: When the folding base is unfolded, the unlocking block abuts against the lower surface of the gear ring, and the dial ring presses down on the folding base to bring it closer to / fit against the rotating base. At this time, the lower wear-resistant ring moves downward and compresses the lifting spring; and the locking block is embedded in the locking groove to constrain the circumferential degree of freedom between the two. S1. When the motor is powered on, the folding begins. The gear ring is under stress and rotates clockwise relative to the rotating base. The paddle moves clockwise and pushes the lifting slider to rotate the dial ring clockwise. At this time, the lifting slope contacts the supporting slope. At the same time, the unlocking block begins to unlock in accordance with the unlocking slot, providing upward space for the dial ring to be inserted into the subsequent upward movement. S2. As the gear ring rotates clockwise relative to the rotating base, the lifting slider moves upward along the lifting slope under the push of the paddle, and the paddle ring moves upward and fits with the gear ring. At this time, the lifting spring pushes the folding base upward through the lower wear-resistant ring to separate the folding base from the rotating base and reduce friction. At the same time, the locking block disengages from the locking groove to unlock the circumferential degree of freedom between the folding base and the rotating base. S3. As the gear ring rotates clockwise relative to the rotating base, the paddle, unlocking block, and lifting groove form a rigid contact. At this time, the folding base begins to rotate counterclockwise under the drive of the reverse force until it is folded in place. S4. When the folded position is in place, the top of the locking block and the bottom of the folding base are supported to create an upward gap between the folding base and the rotating base.

10. A low-drag folding device for a rearview mirror according to claim 9, characterized in that: When the motor is powered on and the folding base begins to unfold in its folded state, the folding base rotates clockwise under the reverse force of the gear ring. When the folding base is fully unfolded, the locking block realigns with the locking groove to leave axial space for the folding base to fall. At this time, the end face of the anti-folding groove abuts against the end face of the anti-folding block, forcing the folding base to drive the dial ring to generate a clockwise rotation torque. Since the lifting slider is constrained by the lifting groove, the gear ring is forced to rotate counterclockwise. At this time, the circumferential angle difference between the gear ring and the dial ring causes the unlocking block to slide out of the unlocking groove. The dial ring moves downward and pushes the folding base to fall, causing the locking block to engage with the locking groove for positioning. At this time, the unfolding is completed and the positioning state is entered.

Images