Automatic folding device for exterior mirror and automatic folding control method

Abstract

The automatic folding device for outside rearview mirror comprises a rearview mirror and a mounting bracket, a rotating part is mounted at the end of the mounting bracket, the rearview mirror is mounted on the rotating part, a matched driving part is arranged in the inner cavity of the mounting bracket, the end of the mounting bracket is of hollow structure, a mounting hole is formed in the mounting bracket, a control part is arranged at the bottom of the inner cavity of the mounting bracket, the top of the control part passes through the mounting hole and interacts with the rearview mirror. The parking sensing part and the driving sensing part can automatically display the rotating state of the rearview mirror, automatically identify whether the rearview mirror is completely opened or closed, so that the rearview mirror can be determined to be in a safe position when driving or parking. The automatic folding method for outside rearview mirror is provided, in which the automatic opening and closing of the rearview mirror is performed when the automobile is used, and the specific opening and closing state of the rearview mirror can be automatically detected to determine whether the rearview mirror is completely opened or stored, thereby improving the safety.

Description

Automatic folding device for exterior rearview mirrors and automatic folding control method Technical Field

[0001] This invention relates to the field of automotive rearview mirror technology, and in particular to an automatic folding device for exterior rearview mirrors. Background Technology

[0002] Rearview mirrors are tools that allow drivers to directly obtain external information about the rear, sides, and bottom of the vehicle while seated in the driver's seat. To facilitate driver operation, prevent traffic accidents, and ensure personal safety, all countries mandate the installation of rearview mirrors on vehicles, and all rearview mirrors must be adjustable.

[0003] Automatic folding rearview mirrors are very common in cars in recent years. However, due to occasional problems with the circuit control, the rearview mirrors may not open or fully open while driving, or may not be folded properly when parked. The former can cause driving safety issues, while the latter can easily lead to scratches on the rearview mirrors. Therefore, improvements are needed. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of the aforementioned technologies by designing an automatic folding device for exterior rearview mirrors.

[0005] The automatic folding device for exterior rearview mirrors designed in this invention includes a rearview mirror and a mounting bracket. A rotating component is installed at the end of the mounting bracket, and the rearview mirror is mounted on the rotating component. The rotating component has a cooperating driving component in the inner cavity of the mounting bracket. The end of the mounting bracket is a hollow structure, and a mounting hole is opened on the mounting bracket. A control component is provided at the bottom of the inner cavity of the mounting bracket. The top of the control component passes through the mounting hole and interacts with the rearview mirror.

[0006] The control components include a top control body, a middle buffer shaft, and a bottom buffer box. The top of the control body is provided with a guide surface, which consists of two symmetrical inclined surfaces. The buffer shaft is fixedly installed on the bottom surface of the control body, and the bottom of the buffer shaft is inserted into the buffer box. A second spring is provided in the buffer box. When the buffer shaft is pressed down, the second spring is compressed, thereby achieving buffering and limiting.

[0007] A parking sensor is fixedly installed at the bottom of the inner cavity of the buffer box. When the vehicle is parked, the drive component drives the rotating component to rotate, and the rearview mirror rotates to the retracted state. In this state, when the rearview mirror is retracted, it acts on the guide surface, causing the control body to compress the second spring of the buffer box. After the rearview mirror is fully retracted, the second spring presses down, causing the bottom of the buffer shaft to contact the parking sensor. At this time, the parking sensor sends a signal to indicate that the rearview mirror has been retracted. When the rearview mirror is not retracted after parking, the parking sensor cannot detect it. The parking sensor is connected to the in-vehicle display and displays that the rearview mirror is not retracted at this time.

[0008] After the user gets into the vehicle, the rearview mirror is initially closed, and the in-vehicle display shows that the rearview mirror is closed to prompt the user to open it. When the rearview mirror is open, it rotates to expose the top of the control unit, and the buffer shaft returns upward under the action of the second spring, thereby releasing the action on the parking sensor. When the rearview mirror is fully open, the second end of the rearview mirror rotates to fit against the side of the control unit where the driving sensor is installed. At this time, the second end acts on the driving sensor, which sends a signal to the in-vehicle display to indicate that the rearview mirror is fully open.

[0009] The bottom of the buffer shaft is fixedly installed with a lower limit part, and the top of the buffer box is provided with an upper limit part. The second spring is located below the lower limit part, and the top of the lower limit part moves upward and is restricted to the bottom surface of the upper limit part.

[0010] The rotating component includes, in sequence, a rotating shaft, a bearing, a first spring, a driven gear, and a clamping sleeve. The bottom of the rotating shaft is fixedly mounted on the inner ring of the bearing, the first spring is placed on the top of the bearing, and the driven gear is located on the top of the first spring.

[0011] A cross block is fixedly installed on the outer wall of the rotating shaft above the top surface of the bearing, and the inner ring of the driven gear has a cross groove that matches the cross block.

[0012] The driven gear includes a clamping groove on the top surface, the inner ring of the clamping sleeve is provided with an internal thread, and the outer wall surface of the rotating shaft is provided with an external thread at the position directly above the cross block. The clamping sleeve is installed through the threaded engagement of the internal thread and the external thread.

[0013] The clamping sleeve is fully screwed into the bottom of the external thread, and the bottom surface of the clamping sleeve presses against the driven gear. At the same time, the top of the clamping sleeve is limited by the external thread. The driving component includes a drive gear. When the driving component is running, the drive gear rotates and meshes with the driven gear.

[0014] A limiting plate is fixedly installed on the top of the driven gear. When the clamping sleeve clamps the driven gear and is partially located in the clamping groove, the limiting plate clamps the top surface of the driving gear.

[0015] Both the parking sensor and the driving sensor are pressure sensors. When they are subjected to pressure, they send signals to control the operation of the drive components according to preset instructions.

[0016] Both the parking sensor and the driving sensor are limit switches. When they are subjected to pressure of a certain travel, they send signals to control the operation of the drive components according to preset instructions.

[0017] A method for controlling the automatic folding of exterior rearview mirrors, comprising the aforementioned automatic folding device for exterior rearview mirrors, includes the following steps:

[0018] S1: When parking, the drive unit automatically starts to rotate and retract the rearview mirror. The specific steps are as follows: after the driver stops the car and the parking brake is engaged, the drive unit automatically runs, driving the rotating component to rotate, so that the rearview mirror rotates to the retracted state. The drive unit runs until the rearview mirror is fully retracted and presses down the parking sensor. When the rearview mirror rotates and presses down the parking sensor, the parking sensor sends a signal to the drive unit and stops it from rotating.

[0019] S2: Rotation compensation after automatic folding of the rearview mirror. The specific steps are as follows: when the rearview mirror automatically rotates to retract, the rearview mirror is not fully retracted when it just touches the parking sensor. Therefore, when the parking sensor sends a signal, a buffer is set between the sending time and the actual contact time of the rearview mirror. That is, when the parking sensor is pressed down by the rearview mirror, the signal sent to the drive component is delayed to give the drive component time to compensate, so as to achieve the purpose of fully retracting the rearview mirror.

[0020] S3: When the vehicle starts, the drive unit automatically starts, causing the rearview mirror to rotate and open. When it opens, the outer end of the bottom of the rearview mirror leaves the range of the control unit. At this time, the pressure at the parking sensor in the control unit is released. The drive unit continues to run. After the inner end of the bottom of the rearview mirror rotates, it contacts the driving sensor on the control unit. At this time, the driving sensor sends a signal to control the drive unit to stop running directly.

[0021] S4: Automatic detection of the rearview mirror status when the vehicle starts or stops. The detection is performed by the parking sensor and the driving sensor. When parking, the rearview mirror is fully retracted and the control unit is pressed down. At this time, the parking sensor will generate a pressure signal. If no pressure signal is generated, it means that the rearview mirror is not fully retracted (to prevent incomplete retraction from occupying space and causing scratches). When starting, the driving sensor should generate a pressure signal. If no pressure signal is generated, it means that the rearview mirror is not open or is not fully open (to prevent the rearview mirror from failing to open automatically or opening incompletely, affecting driving and causing safety issues).

[0022] The automatic folding rearview mirror designed in this invention can automatically display the rotation status of the rearview mirror through the parking sensor and driving sensor, and automatically identify whether the rearview mirror is fully open or closed, thereby ensuring that the rearview mirror is in a safe position when driving or parked.

[0023] Based on the proposed automatic folding device for exterior rearview mirrors, this invention further proposes an automatic folding method for exterior rearview mirrors that can automatically open and close the rearview mirrors during vehicle use, and can automatically detect the specific open / closed state of the rearview mirrors to determine whether the rearview mirrors are fully open or folded, thereby improving safety. Attached Figure Description

[0024] Figure 1 is a schematic diagram of the overall structure;

[0025] Figure 2 is a structural schematic diagram of Figure 1 from another angle;

[0026] Figure 3 is a schematic diagram of the structure in partial cross-section as shown in Figure 2;

[0027] Figure 4 is a schematic diagram of the control component;

[0028] Figure 5 is a structural schematic diagram of the clamping sleeve, driven gear and first spring;

[0029] Figure 6 is a schematic diagram of the structure at the rotating shaft;

[0030] Figure 7 is a structural schematic diagram of the drive component (motor not shown);

[0031] Figure 8 is a structural diagram of the components in Figures 5 and 6 when they are assembled.

[0032] In the diagram: 1. Rearview mirror; 2. Mounting bracket; 4. Rotating component; 5. Drive component; 51. Drive shaft; 52. Drive gear; 53. Transmission groove; 6. Control component; 61. Guide surface; 62. Control body; 63. Buffer shaft; 64. Buffer box; 65. Lower limit part; 66. Second spring; 67. Parking sensor; 68. Upper limit part; 7. Pressing sleeve; 71. Internal thread part; 8. Driven gear; 81. Pressing groove; 82. Limiting plate; 83. Cross groove; 9. First spring; 10. Rotating shaft; 101. External thread part; 102. Cross block; 103. Bearing. Detailed Implementation

[0033] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention are within the scope of protection of the present invention.

[0034] Example:

[0035] As shown in Figures 1-8, the automatic folding rearview mirror device described in this embodiment includes a rearview mirror 1 and a mounting bracket 2. A rotating component 4 is mounted at the end of the mounting bracket 2, and the rearview mirror 1 is mounted on the rotating component 4. The rotating component 4 has a cooperating driving component 5 in the inner cavity of the mounting bracket 2. The end of the mounting bracket 2 is a hollow structure, and a mounting hole is opened on the mounting bracket 2. A control component 6 is provided at the bottom of the inner cavity of the mounting bracket 2. The top of the control component 6 passes through the mounting hole and interacts with the rearview mirror 1. The control component 6 includes a top control body 62 and a middle control body 63. The control body 62 has a buffer shaft 63 at the top and a buffer box 64 at the bottom. The top of the control body 62 is provided with a guide surface 61, which consists of two symmetrical inclined surfaces. The buffer shaft 63 is fixedly installed on the bottom surface of the control body 62. The bottom of the buffer shaft 63 is inserted into the buffer box 64. The buffer box 64 is provided with a second spring 66. When the buffer shaft 63 is pressed down, the second spring 66 is compressed, thereby achieving buffering and limiting. Unless otherwise specified, in this embodiment, each electrically connected component in the drive component 4 and the control component 6 can be electrically connected to the controller inside the car.

[0036] A parking sensor 67 is fixedly installed at the bottom of the inner cavity of the buffer box 64. When the vehicle is parked, the drive component 5 drives the rotating component 4 to operate, and the rearview mirror 1 rotates to the retracted state. In this state, when the rearview mirror 1 is retracted, it acts on the guide surface 61, causing the control body 62 to compress the second spring 66 of the buffer box 64. After the rearview mirror 1 is fully retracted, the second spring 66 presses down, causing the bottom of the buffer shaft 63 to contact the parking sensor 67. At this time, the parking sensor 67 sends a signal to indicate that the rearview mirror 1 has been retracted. When the rearview mirror 1 is not retracted after parking, the parking sensor 67 cannot sense it. The parking sensor 67 is connected to the in-vehicle display and displays that the rearview mirror 1 is not retracted at this time.

[0037] After the user gets into the vehicle, the rearview mirror 1 is initially in the closed state. At this time, the in-vehicle display shows that the rearview mirror 1 is in the closed state to prompt the user to open the rearview mirror 1. When the rearview mirror 1 is in the open state, the rearview mirror 1 rotates so that the top of the control component 6 is unobstructed. At this time, the buffer shaft 63 is restored upward by the action of the second spring 66, thereby releasing the action on the parking sensor 67. When the rearview mirror 1 is fully open, the second end of the rearview mirror 1 will rotate to fit against the side of the control body 62 where the driving sensor 69 is installed. At this time, the second end will act on the driving sensor 69, and the driving sensor 69 will send a signal to the in-vehicle display to indicate that the rearview mirror 1 is fully open.

[0038] It is worth noting that the parking sensor 67 and driving sensor 69 mentioned above are both connected to the rotating component 4 via a wireless control module to supplement the above description of "sending signals for control".

[0039] The bottom of the buffer shaft 63 is fixedly installed with a lower limit part 65, and the top of the buffer box 64 is provided with an upper limit part 68. The second spring 66 is located below the lower limit part 65. The top of the lower limit part 65 moves upward and is restricted to the bottom surface of the upper limit part 68. Thus, the control body 62 of the control component 6 can have an upward movement tendency.

[0040] In this embodiment, the rotating component 4 sequentially includes a rotating shaft 10, a bearing 103, a first spring 9, a driven gear 8, and a clamping sleeve 7. The bottom of the rotating shaft 10 is fixedly installed on the inner ring of the bearing 103, the first spring 9 is placed on the top of the bearing 103, and the driven gear 8 is disposed on the top of the first spring 9. A cross block 102 is fixedly installed on the outer wall of the rotating shaft 10 above the top surface of the bearing 103. The inner ring of the driven gear 8 has a cross groove 83 that matches the cross block 102. The driven gear 8 includes a clamping groove 81 on its top surface. The inner ring of the clamping sleeve 7 has an internal thread 71, and the outer wall of the rotating shaft 10 has an external thread 101 located directly above the cross block 102. The clamping sleeve 7 is installed through the threaded engagement of the internal thread 71 and the external thread 101.

[0041] During installation, the clamping sleeve 7 can be fully screwed into the bottom of the external thread 101. The bottom surface of the clamping sleeve 7 presses against the driven gear 8, while the top of the clamping sleeve 7 is limited by the external thread 101. Thus, after installation, there is no threaded connection between the clamping sleeve 7 and the rotating shaft 10, and the rotation of the rotating shaft 10 will not affect the stabilizing effect of the clamping sleeve 7. For ease of understanding, as shown in Figure 7, the driving component 5 includes a driving gear 52. When the driving component 5 operates, the driving gear 52 rotates, meshing with the driven gear 8. In this embodiment, the last part of the rotating component 4 to be driven by the driving component 5 is the rotating shaft 10. The rearview mirror 1 is mounted on the rotating shaft 10 and rotates due to the rotation of the rotating shaft 10.

[0042] To increase the stability of the driven gear 8 and the driving gear 52 after they are engaged, a limiting plate 82 is fixedly installed on the top of the driven gear 8. When the clamping sleeve 7 clamps the driven gear 8 and is partially located in the clamping groove 81, the limiting plate 82 clamps the top surface of the driving gear 52. Therefore, when the driven gear 8 and the driving gear 52 are engaged in transmission, it is not easy for the gears to derail.

[0043] In this embodiment, the parking sensor 67 and the driving sensor 69 can be selected from a variety of options:

[0044] ① Both are pressure sensors. When they are subjected to pressure, they send signals to control the operation of the drive component 5 according to preset instructions.

[0045] ② Both the parking sensor 67 and the driving sensor 69 are limit switches. After being subjected to pressure of a certain stroke, they send signals to control the operation of the drive component 5 according to preset instructions.

[0046] Of course, the parking sensor 67 and the driving sensor 69 can also be configured such that one selects a limit switch and the other selects a pressure sensor. Any combination is possible, and they will not be listed one by one. The implementation principle is similar and will not be elaborated.

[0047] Based on the aforementioned automatic folding device for exterior rearview mirrors, a method for controlling the automatic folding of exterior rearview mirrors is proposed, comprising the following steps:

[0048] S1: When parking, the drive unit 5 is automatically activated to rotate and retract the rearview mirror 1. The specific steps are as follows: after the driver stops the car and the parking brake is engaged, the drive unit 5 automatically runs, driving the rotating component 4 to rotate, so that the rearview mirror 1 rotates to the retracted state. The drive unit 5 runs until the rearview mirror 1 is fully retracted and presses down the parking sensor 67. When the rearview mirror 1 rotates and presses down the parking sensor 67, the parking sensor 67 sends a signal to the drive unit 5 and stops it from rotating.

[0049] S2: The rotation compensation after the rearview mirror 1 automatically folds is as follows: when the rearview mirror 1 automatically rotates to retract, the rearview mirror 1 has just come into contact with the parking sensor 67, but the rearview mirror 1 is not yet fully retracted. Therefore, when the parking sensor 67 sends a signal, it sets a buffer between the sending time and the actual contact time of the rearview mirror 1. That is, when the parking sensor 67 is pressed down by the rearview mirror 1, it delays sending a signal to the drive component 5 to give the drive component 5 time to compensate, so as to achieve the purpose of allowing the rearview mirror 1 to be fully retracted.

[0050] S3: When the vehicle starts, the drive unit 5 is automatically activated, causing the rearview mirror 1 to rotate and open. When it opens, the outer end of the bottom of the rearview mirror 1 leaves the range of the control unit 6. At this time, the pressure at the parking sensor 67 in the control unit 6 is released. The drive unit 5 continues to run. After the inner end of the bottom of the rearview mirror 1 rotates, it contacts the driving sensor 69 on the control body 62. At this time, the driving sensor 69 sends a signal to control the drive unit 5 to stop running directly.

[0051] S4: Automatic detection of the status of the rearview mirror 1 when the vehicle starts or stops. The detection is performed by the parking sensor 67 and the driving sensor 69. When the vehicle is stopped, the rearview mirror 1 is fully retracted and the control unit 6 is pressed down. At this time, the parking sensor 67 has a pressure signal. If no pressure signal is generated, it means that the rearview mirror 1 is not fully retracted (to prevent the rearview mirror from occupying space or causing scratches due to incomplete retraction). When the vehicle is started, the driving sensor 69 should have a pressure signal. If no pressure signal is generated, it means that the rearview mirror 1 is not open or is not fully open (to prevent the rearview mirror 1 from failing to open automatically or not opening completely, which may affect driving and cause safety problems).

[0052] The aforementioned automatic folding device can automatically open and close the rearview mirror 1, and the rearview mirror 1 can rotate to the correct position when opening and closing, so that the rearview mirror 1 will not fail to rotate to the correct position in the middle, thus ensuring that the rearview mirror 1 plays a safe and stable role during driving.

[0053] This invention is not limited to the preferred embodiments described above. Anyone can derive other products in various forms under the guidance of this invention. However, regardless of any changes in shape or structure, any technical solution that is the same as or similar to this application falls within the protection scope of this invention.

Claims

1. An automatic folding device for an exterior rearview mirror, comprising a rearview mirror (1) and a mounting bracket (2), characterized in that, A rotating component (4) is installed at the end of the mounting bracket (2). The rearview mirror (1) is mounted on the rotating component (4). The rotating component (4) has a cooperating driving component (5) in the inner cavity of the mounting bracket (2). The end of the mounting bracket (2) is hollow. The mounting bracket (2) has a mounting hole. A control component (6) is provided at the bottom of the inner cavity of the mounting bracket (2). The top of the control component (6) passes through the mounting hole and interacts with the rearview mirror (1). The control component (6) includes a top control body (62), a middle buffer shaft (63), and a bottom buffer box (64). The top of the control body (62) has a guide surface (61), and the guide surface (61) is two symmetrical inclined surfaces. The buffer shaft ( 63) Fixedly installed on the bottom surface of the control body (62), the bottom of the buffer shaft (63) is inserted into the buffer box (64), and the buffer box (64) is provided with a second spring (66). When the buffer shaft (63) is pressed down, the second spring (66) is compressed, thereby achieving buffering and limiting; a parking sensor (67) is fixedly installed at the bottom of the inner cavity of the buffer box (64). When the vehicle is parked, the drive component (5) drives the rotating component (4) to run, and the rearview mirror (1) rotates to the retracted state. In this state, when the rearview mirror (1) is retracted, it acts on the guide surface (61) so that the control body (62) compresses the second spring (66) of the buffer box (64). After the rearview mirror (1) is fully retracted, the second spring (66) presses down to allow the buffer shaft (63) to be retracted. The bottom of the rearview mirror (1) contacts the parking sensor (67), at which time the parking sensor (67) sends a signal to indicate that the rearview mirror (1) has been retracted; after parking, if the rearview mirror (1) is not retracted, the parking sensor (67) cannot sense it, the parking sensor (67) is connected to the in-vehicle display, and at this time it displays that the rearview mirror (1) is not retracted; after the user gets into the car, the rearview mirror (1) begins to be in the closed state, at which time the in-vehicle display shows that the rearview mirror (1) is in the closed state to prompt the user to open the rearview mirror (1); when the rearview mirror (1) is in the open state, the rearview mirror (1) rotates so that the top of the control component (6) is unobstructed, at which time the buffer shaft (63) is restored upward by the action of the second spring (66), thereby releasing the parking sensor (63). The function of 67) is that when the rearview mirror (1) is fully open, the second end of the rearview mirror (1) will rotate to the side of the control body (62) on which the driving sensor (69) is installed and fit together. At this time, the second end will act on the driving sensor (69). At this time, the driving sensor (69) sends a signal to the in-vehicle display to indicate that the rearview mirror (1) is fully open. The rotating component (4) includes a rotating shaft (10), a bearing (103), a first spring (9), a driven gear (8) and a clamping sleeve (7) in sequence. The bottom of the rotating shaft (10) is fixedly installed on the inner ring of the bearing (103), the first spring (9) is placed on the top of the bearing (103), and the driven gear (8) is set on the top of the first spring (9).A cross block (102) is fixedly installed on the outer wall of the rotating shaft (10) above the top surface of the bearing (103). The inner ring of the driven gear (8) is provided with a cross groove (83) that matches the cross block (102). The clamping sleeve (7) is fully screwed into the bottom of the external thread (101). The bottom surface of the clamping sleeve (7) presses against the driven gear (8). At the same time, the top of the clamping sleeve (7) is limited by the external thread (101). The driving component (5) includes a driving gear (52). When the driving component (5) is running, the driving gear (52) rotates and meshes with the driven gear (8). A limiting plate (82) is fixedly installed on the top of the driven gear (8). When the clamping sleeve (7) presses against the driven gear (8) and is partially located in the clamping groove (81), the limiting plate (82) presses against the top surface of the driving gear (52). It also includes an automatic folding control method for the exterior rearview mirror. Includes the following steps: S1: When parking, the drive unit (5) is automatically activated to rotate and retract the rearview mirror (1). Specifically, after the driver stops the car and the parking brake is engaged, the drive unit (5) automatically operates, driving the rotating unit (4) to rotate, causing the rearview mirror (1) to rotate so that the rearview mirror (1) rotates as a whole to the retracted state. The drive unit (5) continues to operate until the rearview mirror (1) is fully retracted and presses down on the parking sensor (67). When the rearview mirror (1) rotates and presses down on the parking sensor (67), the parking sensor (67) sends a signal to the drive unit (5) and stops it from rotating. S2: Rotation compensation after the rearview mirror (1) is automatically folded. Specifically, when the rearview mirror (1) automatically rotates and retracts, the rearview mirror (1) has just touched the parking sensor (67) and is not yet fully retracted. Therefore, the parking sensor... When the signal is sent, the response unit (67) sets a buffer between the sending time and the actual contact time of the rearview mirror (1). That is, when the parking sensor unit (67) is pressed down by the rearview mirror (1), the signal is delayed to the drive unit (5) to give the drive unit (5) time to compensate, so as to achieve the purpose of fully retracting the rearview mirror (1); S3: When the vehicle is started, the drive unit (5) is automatically started to make the rearview mirror (1) rotate to open. When it is opened, the outer end of the bottom of the rearview mirror (1) leaves the range of the control unit (6). At this time, the pressure at the parking sensor unit (67) in the control unit (6) is canceled. At this time, the drive unit (5) continues to run. After the inner end of the bottom of the rearview mirror (1) rotates, it contacts the driving sensor unit (69) on the control body (62). At this time, the driving sensor unit (69) sends a signal to control the drive unit (5) to stop running directly.

2. The automatic folding device for exterior rearview mirrors according to claim 1, characterized in that, The bottom of the buffer shaft (63) is fixedly installed with a lower limit part (65), and the top of the buffer box (64) is provided with an upper limit part (68). The second spring (66) is located below the lower limit part (65), and the top of the lower limit part (65) moves upward and is restricted to the bottom surface of the upper limit part (68).

3. The automatic folding device for exterior rearview mirrors according to claim 1, characterized in that, The driven gear (8) includes a clamping groove (81) on the top surface. The inner ring of the clamping sleeve (7) is provided with an internal thread (71). The outer wall of the rotating shaft (10) is provided with an external thread (101) located directly above the cross block (102). The clamping sleeve (7) is installed by the threaded engagement of the internal thread (71) and the external thread (101).

4. The automatic folding device for exterior rearview mirrors according to claim 1, characterized in that, Both the parking sensor (67) and the driving sensor (69) are pressure sensors. When they are subjected to pressure, they send signals to control the operation of the drive unit (5) according to preset instructions.

5. The automatic folding device for exterior rearview mirrors according to claim 1, characterized in that, Both the parking sensor (67) and the driving sensor (69) are limit switches. After they are subjected to pressure of a certain stroke, they send signals to control the operation of the drive component (5) according to preset instructions.

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