Automobile rearview mirror with electric adjusting auxiliary visual angle

Abstract

The invention discloses an automobile rearview mirror with an electric adjusting auxiliary visual angle, which comprises a mounting frame, a rearview mirror body, an auxiliary reflector device and a control system, and is characterized in that the mounting frame is arranged on the side surface of an automobile body; the rearview mirror body is rotatably mounted on the front side of the mounting frame; the auxiliary reflector device comprises a mounting bracket, an auxiliary mirror surface, a first adjusting assembly and a second adjusting assembly, and the mounting bracket is fixedly arranged on the edge of the end part of the rearview mirror body; and the auxiliary mirror surface is movably arranged on the mounting bracket. Therefore, electric adjustment of the horizontal angle and the vertical angle of the auxiliary mirror surface is achieved through the vehicle-mounted control system, manual operation is not needed, the first adjusting assembly and the second adjusting assembly are independently driven, universal angle adjustment is achieved, a view blind area is covered, the spherical hinge support is matched with the linear sliding rail, a damping rubber pad is combined, angle deviation caused by vibration is reduced, adjusting precision is guaranteed, and driving safety is improved.

Description

Technical Field

[0001] The present application relates to the technical field of automobile parts, and in particular to an automobile rearview mirror with an electrically adjustable auxiliary viewing angle. Background Art

[0002] At present, automobile auxiliary mirrors are widely used in various types of vehicles as a supplementary device for the field of vision of the main rearview mirror. However, the mainstream auxiliary mirrors on the market mostly adopt an independent structure, which is temporarily fixed to the main rearview mirror housing or the side of the car body by suction cups or adhesives, and have the following significant defects:

[0003] 1. The installation method is backward:

[0004] Suction cup or adhesive auxiliary mirrors rely on physical adsorption force to fix, and they can easily fall off due to airflow disturbance or vibration when driving at high speed, posing a safety hazard.

[0005] 2. Limitations of adjustment function:

[0006] Existing auxiliary mirrors generally use manual adjustment. The driver needs to adjust the mirror angle with his fingers after parking. During the operation, the driver's line of sight is away from the road, increasing driving risks. In addition, manual adjustment has low accuracy and it is difficult to accurately adapt to the height and sitting posture differences of different drivers, or the dynamic vision requirements of the vehicle in complex road conditions such as bends and slopes, resulting in long-term blind spots in the side areas, wheel arches and other areas.

[0007] 3. Insufficient structural stability:

[0008] The independent auxiliary mirror lacks a rigid connection with the main rearview mirror and is only fixed by a single-point suction cup. The bumps and vibrations during vehicle driving can easily cause the mirror angle to shift, requiring frequent readjustment. At the same time, the damping characteristics of traditional articulated adjustment structures (such as simple hinges or ball joints) are unstable and cannot effectively absorb vibration energy, further exacerbating the unreliability of field of view monitoring.

[0009] In response to the above problems, there is an urgent need for an auxiliary reflector device that can be integrated with the main rearview mirror and has an electric adjustment function. While improving the consistency of the overall vehicle appearance, it can achieve accurate and stable adjustment of the auxiliary viewing angle, fundamentally solving the functional defects of the existing suction cup auxiliary mirror. Summary of the invention

[0010] The present application aims to solve one of the technical problems in the related art at least to some extent.

[0011] To this end, the first purpose of this application is to provide a car rearview mirror with an electrically adjustable auxiliary viewing angle, which can realize electric adjustment of the horizontal and vertical angles of the auxiliary mirror through the vehicle-mounted control system. The driver does not need manual operation, thereby improving driving safety.

[0012] The second object of the present application is to provide a vehicle rearview mirror with an electrically adjustable auxiliary viewing angle. The first adjustment component and the second adjustment component are independently driven to achieve universal angle adjustment of the auxiliary mirror surface, effectively covering the visual blind area of the traditional fixed auxiliary mirror.

[0013] The third object of the present application is to provide a vehicle rearview mirror with an electrically adjustable auxiliary viewing angle. The cooperation of the ball hinge support and the linear slide rail, and the setting of the shock-absorbing rubber pad reduce the angle deviation caused by vehicle vibration and ensure the adjustment accuracy.

[0014] To achieve the above object, an embodiment of the first aspect of the present application provides a vehicle rearview mirror with an electrically adjustable auxiliary viewing angle, including a mounting bracket, a rearview mirror body, an auxiliary reflector device, and a control system. Among them, the mounting bracket is configured to be mounted on the side of the vehicle body; the rearview mirror body is rotatably mounted on the front side of the mounting bracket; the auxiliary reflector device includes a mounting bracket, an auxiliary mirror surface, a first adjustment component, and a second adjustment component. Among them, the mounting bracket is fixedly arranged at the end edge of the rearview mirror body; the auxiliary mirror surface is movably arranged on the mounting bracket; the first adjustment component is arranged inside the rearview mirror body, and its output end is connected to the auxiliary mirror surface for driving the auxiliary mirror surface to deflect in the horizontal plane; the second adjustment component is arranged inside the rearview mirror body, and its output end is connected to the auxiliary mirror surface for driving the auxiliary mirror surface to deflect in the vertical plane; both the first adjustment component and the second adjustment component are electrically connected to the vehicle-mounted control system.

[0015] An embodiment of a vehicle rearview mirror with an electrically adjustable auxiliary viewing angle of the present application realizes the electric adjustment of the horizontal and vertical angles of the auxiliary mirror surface through the vehicle-mounted control system, without manual operation. The first and second adjustment components are independently driven to achieve universal angle adjustment, cover the visual blind area, the ball hinge support cooperates with the linear slide rail, and in combination with the shock-absorbing rubber pad, reduce the angle deviation caused by vibration and ensure the adjustment accuracy, improving driving safety.

[0016] In addition, the vehicle rearview mirror with an electrically adjustable auxiliary viewing angle proposed above according to the present application may further have the following additional technical features:

[0017] In an embodiment of the present application, the first adjustment assembly includes a support frame, a ball head link, a ball hinge support, a linear slide rail, a sliding plate, a first hinge plate, a transmission link, and a first electric push rod. Among them, the support frame is fixedly arranged in the middle of the inner cavity of the rearview mirror body; the ball head link is vertically fixed at the front end of the support frame, and a spherical connection part is formed at its end; the first end of the ball hinge support is fixedly connected to the back of the auxiliary mirror surface, and a ball socket structure adapted to the ball head link is provided at the second end, and the ball socket structure and the spherical connection part cooperate to form a universal movable connection; the linear slide rail is arranged in parallel on the side wall of the inner cavity of the rearview mirror body; the sliding plate is slidably embedded on the linear slide rail, and its front end is connected to the bottom edge of the auxiliary mirror surface through a silica gel damping block; the first hinge plate is pivotally connected to the other end of the sliding plate through a rotating shaft; the first end of the transmission link is fixedly connected to one end of the first hinge plate; the base of the first electric push rod is fixed on the rear wall of the inner cavity of the rearview mirror body, and the end of its push rod is hinged to the second end of the transmission link.

[0018] In an embodiment of the present application, the second adjustment assembly includes a mounting base, a second hinge plate, and a second electric push rod. Among them, the mounting base is installed at the upper end of the back of the auxiliary mirror surface; the second hinge plate is pivotally connected to the mounting base through a universal joint; the base of the second electric push rod is fixed on the side of the support frame, and the end of its push rod is hinged to one end of the second hinge plate.

[0019] In an embodiment of the present application, both the first electric push rod and the second electric push rod are connected to the control system through a CAN bus, and the control system is configured to receive an external adjustment signal and control the telescopic stroke of the first electric push rod and the second electric push rod to achieve the angular linkage adjustment of the auxiliary mirror surface.

[0020] In an embodiment of the present application, a shock-absorbing rubber pad is provided between the mounting frame and the side of the vehicle body to reduce the influence of vibrations generated during vehicle driving on the rearview mirror body and the auxiliary rearview mirror device.

[0021] In an embodiment of the present application, the surface of the auxiliary mirror surface is coated with an anti-glare coating, which can effectively reduce light reflection and improve the visual clarity of the driver at night or in a strong light environment.

[0022] The advantages of the present application compared with the existing technology are as follows:

[0023] (1) The horizontal and vertical angle electric adjustment of the auxiliary mirror surface is realized through the vehicle-mounted control system, and the driver does not need to operate manually, improving driving safety.

[0024] (2) The first adjustment component and the second adjustment component are driven independently to achieve universal angle adjustment of the auxiliary mirror, effectively covering the visual blind area of the traditional fixed auxiliary mirror.

[0025] (3) The cooperation of the spherical hinge support and the linear slide rail, and the setting of the shock-absorbing rubber pad reduce the angle deviation caused by vehicle vibration and ensure the adjustment accuracy.

[0026] Additional aspects and advantages of the present application will be given in part in the following description, will become apparent in part from the following description, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The above and / or additional aspects and advantages of the present application will become apparent and be readily understood from the following description of the embodiments in conjunction with the drawings, in which:

[0028] Figure 1 is a perspective view of an automotive rearview mirror with electrically adjustable auxiliary viewing angle according to an embodiment of the present application;

[0029] Figure 2 is a perspective view of an automotive rearview mirror with electrically adjustable auxiliary viewing angle according to another embodiment of the present application;

[0030] Figure 3 is a perspective view of an automotive rearview mirror with electrically adjustable auxiliary viewing angle according to another embodiment of the present application;

[0031] Figure 4 is a schematic internal structure view of an automotive rearview mirror with electrically adjustable auxiliary viewing angle according to an embodiment of the present application;

[0032] Figure 5 is a schematic internal structure view of an automotive rearview mirror with electrically adjustable auxiliary viewing angle according to another embodiment of the present application;

[0033] Figure 6 is a schematic control connection view of an automotive rearview mirror with electrically adjustable auxiliary viewing angle according to an embodiment of the present application.

[0034] As shown in the figure: 1. Mounting bracket; 2. Rearview mirror body; 3. Auxiliary reflector device; 4. Control system; 5. Shock-absorbing rubber pad; 6. Anti-glare coating; 11. CAN bus; 31. Mounting support; 32. Auxiliary mirror surface; 33. First adjustment component; 34. Second adjustment component; 331. Support frame; 332. Ball head connecting rod; 333. Spherical hinge support; 334. Linear slide rail; 335. Slide plate; 336. First hinge plate; 337. Transmission connecting rod; 338. First electric push rod; 3351. Silicone damping block; 341. Mounting base; 342. Second hinge plate; 343. Second electric push rod. Detailed implementation mode

[0035] The embodiments of the present application will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary and are intended to explain the present application, and should not be construed as a limitation of the present application. On the contrary, the embodiments of the present application include all changes, modifications, and equivalents that fall within the spirit and scope of the appended claims.

[0036] The following will describe a vehicle rearview mirror with an electrically adjustable auxiliary viewing angle in combination with the accompanying drawings.

[0037] As Figures 1 - 6 shown, a vehicle rearview mirror with an electrically adjustable auxiliary viewing angle according to an embodiment of the present application includes a mounting bracket 1, a rearview mirror body 2, an auxiliary reflector device 3, and a control system 4. The mounting bracket 1 is fixed to the side of the vehicle door sheet metal by bolts, and a mounting base is provided at its front end for carrying the rearview mirror body 2. The rearview mirror body 2 is rotatably connected to the front side of the mounting bracket 1 through a rotating shaft mechanism to achieve the conventional angle adjustment of the main mirror surface.

[0038] It can be understood that the mounting bracket 31 of the auxiliary reflector device 3 is fixed to the right end edge of the rearview mirror body 2 (taking a left-hand drive vehicle as an example), and the end of its extension arm is movably connected to the auxiliary mirror surface 32 through a reconstructed ball joint connection point; the auxiliary mirror surface 32 is embedded in the end groove of the mounting bracket 31 through the ball joint connection point, so that the outer surface of the auxiliary mirror surface 32 and the outer surface of the main mirror surface of the rearview mirror body 2 together form a continuous curved surface approaching a plane, forming an integrated appearance structure of "multiple viewing angles of the same mirror surface".

[0039] Through the multi-degree-of-freedom deflection function of the ball joint connection point (horizontal ±30°, vertical ±15° adjustment range), the auxiliary mirror surface 32 can independently adjust the viewing angle relative to the main mirror surface, covering the visual blind area of the traditional fixed mirror surface while maintaining the overall planar shape of the rearview mirror; the embedded installation design eliminates the external protrusion of the traditional suction cup type auxiliary mirror, making the outer contour line of the rearview mirror smooth and unified, and improving the aesthetic appearance and technological sense of the whole vehicle.

[0040] The first adjustment component 33 and the second adjustment component 34 are both integrated in the cavity of the rearview mirror body 2. The output end of the first adjustment component 33 is connected to the bottom of the auxiliary mirror surface 32 through a link mechanism, and the output end of the second adjustment component 34 is connected to the top of the auxiliary mirror surface 32 through another link mechanism. The power input ends of the two adjustment components are respectively connected to the vehicle-mounted control system 4 through wires.

[0041] Working process:

[0042] 1. Horizontal adjustment: When the vehicle-mounted control system 4 receives a horizontal adjustment instruction (driver operates the button), the electric push rod in the first adjustment component 33 starts. The telescopic movement of the push rod is converted into the linear displacement of the sliding plate through the transmission connecting rod, driving the auxiliary mirror 32 to deflect in the horizontal plane around the ball hinge connection point of the mounting bracket 31. The adjustment range is ±25°, which can eliminate the right blind area.

[0043] 2. Vertical adjustment: When it is necessary to adjust the vertical viewing angle, the electric push rod of the second adjustment component 34 extends and retracts according to the instruction of the control system 4, and pushes the auxiliary mirror 32 to deflect in the vertical plane around the same ball hinge connection point through the top connecting rod. The adjustment range is ±15° to ensure a complete view of the rear road surface.

[0044] 3. Coordinated control: Under complex road conditions, the control system 4 can send instructions to the first adjustment component 33 and the second adjustment component 34 at the same time to achieve the horizontal-vertical linkage deflection of the auxiliary mirror 32. At this time, the horizontal deflection angle α and the vertical deflection angle β satisfy the relationship: β = 0.6α (when α ≤ 20°), ensuring that the viewing angle adjustment conforms to ergonomics.

[0045] It should be noted that the technical details described in this embodiment are as follows:

[0046] Mounting bracket 31: Made of aluminum alloy, the length L of its extension arm is 50 - 80 mm, and the thickness T is 3 mm, meeting the requirements of rigid support.

[0047] Auxiliary mirror 32: The radius of curvature R = 1200 mm, and the area S = 80 cm 2 , and the damping torque M of the ball hinge connection point ≥ 0.5 N·m to prevent the mirror from shaking caused by driving vibration.

[0048] Electrical connection method: The first adjustment component 33 and the second adjustment component 34 are connected to the vehicle-mounted control system 4 through waterproof connectors, and the cable specification is 0.75 mm 2 twisted pair, and the transmission delay ≤ 10 ms.

[0049] In an embodiment of the present application, as Figures 1 - 6 shown, the first adjustment component 33 includes a support frame 331, a ball head connecting rod 332, a ball hinge support 333, a linear slide rail 334, a sliding plate 335, a first hinge plate 336, a transmission connecting rod 337, and a first electric push rod 338.

[0050] It can be understood that the support frame 331 is made of aluminum alloy profiles with a thickness of 2 mm, and is vertically fixed at the middle position of the inner cavity of the rearview mirror body 2 through 4 M5 bolts. Its installation plane coincides with the symmetry axis of the rearview mirror body 2.

[0051] The ball head connecting rod 332 is vertically welded at the center of the front end of the support frame 331. The total length L = 50 mm, and the end is processed into a spherical connecting part with a diameter of Φ12 mm, and the surface is polished (Ra ≤ 0.8 μm).

[0052] The first end of the spherical hinge support 333 is fixed at the geometric center point on the back of the auxiliary mirror 32 by 3 M3 screws. The inner diameter of the spherical socket structure at the second end is Φ12.1 mm (with a clearance fit with the ball head connecting rod 332). A polytetrafluoroethylene wear-resistant bushing is attached to the inner wall of the spherical socket, and the friction coefficient μ ≤ 0.05.

[0053] The linear slide rail 334 is installed parallel to the longitudinal axis of the rearview mirror body 2. The ball linear guide rail of model HGH15CA is adopted, and the effective stroke S = 40 mm, and it is fixed on the inner cavity side wall by 4 groups of M4 bolts.

[0054] The sliding plate 335 is a stainless steel plate with a thickness of 3 mm. A slider matching the linear slide rail 334 is provided at the bottom, and the front end is adhesively fixed to the bottom edge of the auxiliary mirror 32 through 2 silicone damping blocks 3351 (Shore hardness HA55, size 10×10×5 mm).

[0055] The first hinge plate 336 is pivotally connected to the rear end of the sliding plate 335 through a Φ6 mm rotating shaft. Oil-impregnated bearings are installed at both ends of the rotating shaft, and the hinge plate can rotate around the shaft by an angle θ = ±30°.

[0056] The first end of the transmission connecting rod 337 is rigidly connected to the free end of the first hinge plate 336 by an M4 bolt. The second end is provided with a Φ5 mm through hole, and a spherical plain bearing (model GE5-ET) is installed in the hole.

[0057] The first electric push rod 338 selects a DC electric push rod with a stroke L = 50 mm (thrust 200 N). The base is fixed on the inner cavity rear wall of the rearview mirror body 2 by 4 M5 bolts, and the end of the push rod is hinged to the spherical plain bearing of the transmission connecting rod 337 through a Φ5 mm pin shaft.

[0058] Working process:

[0059] 1. Electric push rod drive

[0060] When the vehicle-mounted control system 4 sends a horizontal adjustment instruction, the first electric push rod 338 starts:

[0061] The push rod extends: The push rod extends at a speed of v = 10 mm / s → The transmission connecting rod 337 pushes the first hinge plate 336 to rotate clockwise → Drives the sliding plate 335 to slide to the right along the linear slide rail 334 → Traction the auxiliary mirror 32 to deflect to the right through the silicone damping block 3351.

[0062] Pusher rod retraction: The pusher rod retracts at a speed of v = 15 mm / s → The transmission link 337 pulls the first hinge plate 336 to rotate counterclockwise → The sliding plate 335 moves leftward → The auxiliary mirror 32 deflects leftward.

[0063] 2. Ball joint linkage compensation

[0064] During the deflection of the auxiliary mirror 32, the spherical socket structure of the ball joint support 333 makes a universal movement around the spherical connection part of the ball head link 332, compensating for the displacement deviation caused by the mirror angle change, and ensuring the coordination between the linear movement of the sliding plate 335 and the mirror deflection.

[0065] 3. Damping and shock absorption

[0066] The silicone damping block 3351 forms a flexible connection between the sliding plate 335 and the auxiliary mirror 32, which can absorb the high-frequency vibration energy with a frequency f > 20 Hz during vehicle driving, reducing the mirror jitter amplitude to ±0.1° (the traditional rigid connection is ±0.5°).

[0067] In this embodiment, the internal waterproof explanation is as follows:

[0068] The ball head link 332 has a diameter of Φ12 mm and is vertically fixed at the front end of the support frame 331. The end is a spherical connection part, and the surface is coated with a diamond-like carbon coating (DLC) with a coating thickness of 2 - 3 μm and a friction coefficient μ ≤ 0.08 to achieve low-damping rotation.

[0069] As the central axis for the universal rotation of the auxiliary mirror 32, it cooperates with the spherical socket structure 333 through the spherical connection part to transmit the driving force of the first adjustment assembly 33.

[0070] The inner diameter of the spherical socket structure 333 is Φ12.8 mm, forming a 0.8 mm dynamic gap with the ball head link 332. The first end is fixed to the geometric center point on the back of the auxiliary mirror 32 by 3 M3 screws.

[0071] The inner wall of the spherical socket is attached with a polytetrafluoroethylene wear-resistant bushing (thickness 0.3 mm), which further reduces the friction loss in cooperation with the diamond-like carbon coating.

[0072] Double-layer seal structure design:

[0073] The first layer: Fluororubber O-ring seal

[0074] Model specification: Select a fluororubber O-ring with a wire diameter of 2.65 mm (material FKM, temperature resistance -20°C to 200°C) and install it in the annular groove on the outer edge of the spherical socket structure 333.

[0075] The groove depth is 2.25 mm, ensuring that the O-ring compression rate reaches 15% (the wire diameter after compression is 2.25 mm) to form an initial sealing contact stress.

[0076] The groove is pre-coated with perfluoropolyether (PFPE) grease with a viscosity grade of ISOVG100, which reduces the frictional resistance between the O-ring and the ball socket groove (starting torque ≤ 0.1 N·m).

[0077] The O-ring fills the gap at the outer edge of the ball socket through compressive elastic deformation, preventing external rainwater and dust from invading from the periphery of the ball joint assembly. At the same time, the grease forms an oil film, reducing the wear of the O-ring and extending the sealing life.

[0078] The second layer: silicone-based sealant layer

[0079] Material characteristics: One-component room temperature vulcanizing silicone rubber (RTV) is used, with a cured thickness of 1.5 ± 0.2 mm, a hardness of Shore A25, and an elongation at break ≥ 450%, having high elasticity and tear resistance.

[0080] Silicone-based sealant is injected into the 0.8 mm dynamic gap between the ball head link 332 and the ball socket structure 333. The ball head is controlled to be in the initial position (0° rotation angle) through a tooling fixture to ensure that the glue layer evenly fills the gap.

[0081] Let it stand at room temperature (25°C) for 24 hours to form an elastic sealing layer, which together with the O-ring constitutes a double-layer barrier.

[0082] Synergistic effect:

[0083] Angle limitation: The sealing glue layer and the O-ring jointly limit the rotation angle of the ball head link 332 to ±30°. When the mirror deflects to the maximum angle:

[0084] The local elongation rate of the sealing glue layer ≤ 50% (corresponding to the glue layer thickness stretching from 1.5 mm to 2.25 mm), which does not exceed the elongation at break of the material, ensuring the sealing integrity.

[0085] The radial displacement of the O-ring caused by the rotation of the ball head results in a contact stress ≥ 1.2 MPa, maintaining an effective sealing pressure (critical sealing stress ≥ 0.8 MPa).

[0086] Dynamic sealing: During the mirror adjustment process, the silicone-based sealant layer undergoes elastic deformation as the ball head rotates. While filling the dynamic gap, it consumes vibration energy through internal friction of the material, reducing mirror jitter.

[0087] It should be noted that the technical parameters described in this embodiment are:

[0088] Adjustment range: Horizontal deflection angle α = ±25° (corresponding to the sliding plate displacement of ±20 mm)

[0089] Adjustment accuracy: Angle repeat positioning error ≤ 0.3°

[0090] Dynamic response: The response time t from the issuance of the instruction to the mirror deflection reaching the target angle is t ≤ 0.25 s.

[0091] In an embodiment of the present application, as Figures 1 - 6 shown, the second adjustment component 34 includes a mounting base 341, a second hinge plate 342, and a second electric push rod 343.

[0092] It can be understood that the mounting base 341 is formed by stamping an aluminum alloy plate with a thickness of 3 mm, and is vertically fixed at the center position of the upper end of the back surface of the auxiliary mirror 32 by 3 M4 stainless steel screws. Its mounting plane coincides with the vertical center line of the auxiliary mirror 32. The bottom surface of the base is provided with a rib structure, and the bending strength ≥ 200 MPa.

[0093] The second hinge plate 342 is rotatably arranged on the mounting base 341. Oil-containing bearings are installed at both ends of the rotating shaft, and the hinge plate can rotate around the shaft by an angle θ = ±30°.

[0094] The second electric push rod 343 selects a DC electric push rod with a stroke L = 40 mm (thrust 150 N). The base is fixed to the right side surface of the support frame 331 by 2 M6 bolts, and the end of the push rod is hinged to the free end of the second hinge plate 342 through a Φ6 mm spherical plain bearing (model GE6-ET).

[0095] Working process:

[0096] 1. Vertical adjustment drive

[0097] When the vehicle-mounted control system 4 sends a vertical adjustment instruction:

[0098] The push rod extends: The second electric push rod 343 extends at a speed of v = 8 mm / s → The push rod pushes the second hinge plate 342 to rotate upward around the universal joint Y axis → Drives the auxiliary mirror 32 to deflect upward around the spherical connection part of the ball head link 332 through the mounting base 341, with a maximum elevation angle of +15°.

[0099] The push rod retracts: The push rod retracts at a speed of v = 12 mm / s → Pulls the second hinge plate 342 to rotate downward around the Y axis → The auxiliary mirror 32 deflects downward, with a maximum depression angle of -10°.

[0100] The distance D between the hinge point of the free end of the second hinge plate 342 and the push rod and the rotation center of the universal joint is 45 mm, forming a leverage ratio i = 1:1.5 (the push rod stroke of 40 mm corresponds to a mirror deflection of 25°). The effective thrust F of the push rod thrust acting on the mirror after being amplified by the lever is F = 150 N × 1.5 = 225 N.

[0101] It should be noted that the technical parameters described in this embodiment are:

[0102] Adjustment range: Vertical deflection angle θ = +15° (elevation angle) to -10° (depression angle)

[0103] Angle resolution: 0.5° / step (corresponding to a push rod stepping displacement of 0.3 mm)

[0104] Dynamic response: The response time t from the issuance of the instruction to the mirror surface deflecting to the target angle is t ≤ 0.3 s.

[0105] In an embodiment of the present application, as Figures 1 - 6 shown, the first electric push rod 338 and the second electric push rod 343 serve as actuators for driving the auxiliary mirror 32 to adjust, and establish a two-way communication connection with the control system 4 through the CAN bus 11.

[0106] It can be understood that the control modules of the first electric push rod 338 and the second electric push rod 343 are built-in with CAN bus transceivers, and are connected to the CAN bus 11 nodes inside the rearview mirror body 2 through shielded twisted pair cables, and finally access the central processor (ECU) of the vehicle-mounted control system 4.

[0107] The CAN bus 11, as the core communication link of the vehicle-mounted local area network, supports high-reliability and low-latency signal transmission to ensure the synchronization of the control instructions for the two electric push rods.

[0108] The external adjustment signal is input to the control system 4 through the in-vehicle human-machine interface, and the signal types include horizontal adjustment instructions (left / right) and vertical adjustment instructions (up / down).

[0109] After the control system 4 receives the external adjustment signal, it first parses the instruction type:

[0110] If it is a horizontal adjustment instruction, a telescopic signal corresponding to the first electric push rod 338 is generated (for example, "left adjustment" corresponds to the push rod contracting, and "right adjustment" corresponds to the push rod extending);

[0111] If it is a vertical adjustment instruction, a telescopic signal corresponding to the second electric push rod 343 is generated (for example, "up adjustment" corresponds to the push rod extending, and "down adjustment" corresponds to the push rod contracting).

[0112] Actuation and linkage adjustment of the electric push rod

[0113] 1. Action of the first electric push rod 338:

[0114] When the control system 4 sends a "left adjustment" instruction to the first electric push rod 338, the DC motor inside the push rod drives the screw to rotate, driving the push rod body to move towards the base, and pulling the bottom edge of the auxiliary mirror 32 to move left through the transmission link 337 and the first hinge plate 336, realizing the deflection in the horizontal plane.

[0115] 2. Action of the second electric push rod 343:

[0116] When the control system 4 sends an "upward adjustment" instruction to the second electric push rod 343, the motor inside the push rod rotates in the reverse direction, and the push rod body extends outwards. By pushing the upper end of the back of the auxiliary mirror surface 32 through the second hinge plate 342, the deflection in the vertical plane is realized.

[0117] 3. Linkage adjustment mechanism:

[0118] When horizontal and vertical adjustment instructions are input simultaneously, the control system 4 sends target stroke signals to the two electric push rods synchronously through the CAN bus 11 to ensure that the telescopic actions of the first electric push rod 338 and the second electric push rod 343 are completed cooperatively. For example, when reversing, the auxiliary mirror surface 32 needs to deflect towards the lower left. The control system 4 first drives the first electric push rod 338 to contract and then drives the second electric push rod 343 to contract. The two act simultaneously to avoid jamming or angular deviation during the mirror adjustment process.

[0119] In an embodiment of the present application, as Figures 1 - 6 shown, a shock-absorbing rubber pad 5 is provided between the mounting bracket 1 and the side of the vehicle body to reduce the influence of the vibration generated during vehicle driving on the rearview mirror body 2 and the auxiliary rearview mirror device 3.

[0120] It can be understood that the shock-absorbing rubber pad 5 is in the shape of a rectangular sheet and is arranged between the joint surface of the mounting bracket 1 and the vehicle body side, covering the main stress area of the mounting bracket 1.

[0121] A groove adapted to the shock-absorbing rubber pad 5 is provided on the back of the mounting bracket 1 to ensure that the rubber pad will not be displaced during installation. A groove with a width of 5 mm and a depth of 3 mm is opened at the bottom edge of the mounting bracket 1. After the shock-absorbing rubber pad 5 is embedded therein, it is fixedly connected to the vehicle body through bolts.

[0122] Materials and physical properties:

[0123] The shock-absorbing rubber pad 5 is made of silicone rubber material, with a Shore hardness of 40 - 60A, having high elasticity and weather resistance, and can work stably in the temperature range of -40°C to 80°C.

[0124] The thickness of the rubber pad is designed to be 2 - 5 mm, and a microporous structure is evenly distributed inside. The vibration energy is absorbed through the elastic deformation of the material, and at the same time, the damping effect of the micropores can reduce the transmission efficiency of the vibration wave.

[0125] Vibration transmission and buffering principle:

[0126] When the vehicle drives over a bumpy road surface, the road surface vibration is transmitted to the connection interface between the mounting bracket 1 and the vehicle body through the vehicle body frame. The traditional rigid connection (directly fixed with metal bolts) will transmit the vibration to the rearview mirror body 2 and the auxiliary rearview mirror device 3 without attenuation, resulting in high-frequency jitter of the auxiliary mirror surface 32.

[0127] After adding the shock-absorbing rubber pad 5, the vibration needs to pass through the elastic layer of the rubber pad first, and the internal friction between its molecules converts the mechanical vibration energy into heat energy dissipation, thereby weakening the vibration amplitude.

[0128] Elastic deformation absorption: When the mounting bracket 1 is displaced due to the vehicle body vibration, the shock-absorbing rubber pad 5 undergoes compression or tensile deformation along with the mounting bracket 1. For example, the vibration along the vertical direction (Z-axis) will cause the thickness direction of the rubber pad to be compressed, and the elastic potential energy of the material stores temporarily to hinder the vibration transmission.

[0129] The damping coefficient of the rubber pad (0.1 - 0.3) can effectively attenuate the vibration in the frequency band of 20 - 200 Hz (this frequency band is the common road excitation frequency during vehicle driving), reducing the vibration acceleration transmitted to the rearview mirror body 2 by 60% - 80%.

[0130] In an embodiment of the present application, as Figures 1 - 6 shown, the surface of the auxiliary mirror 32 is coated with an anti-glare coating 6, which can effectively reduce light reflection and improve the vision clarity of the driver at night or in a strong light environment.

[0131] It can be understood that the substrate of the auxiliary mirror 32: uses a glass lens with a thickness of 3 - 5 mm, and the surface is polished to a roughness Ra ≤ 0.1 μm to provide a flat attachment base for the coating.

[0132] The anti-glare coating 6: is composed of two composite functional layers:

[0133] Bottom layer: a silica (SiO2) nanoparticle coating with a thickness of 2 - 3 μm, the particle size is 50 - 100 nm, and it is uniformly dispersed by the sol-gel method to form a microscopic uneven structure (roughness Ra 0.5 - 1.0 μm) to achieve light diffuse reflection;

[0134] Top layer: a titanium dioxide (TiO2) antireflection film with a thickness of 3 - 5 μm, deposited by magnetron sputtering technology, and through the refractive index gradient design (the refractive index of the top layer is 1.8 - 2.0, and the refractive index of the substrate is 1.5 - 1.6), reducing the specular reflection of the incident light.

[0135] When the strong light of an oncoming vehicle at night (high beam, light intensity ≥ 10000 cd / m 2 ) irradiates the auxiliary mirror 32, the bottom layer nanoparticle structure of the anti-glare coating 6 first decomposes the direct light into scattered light, changing the spatial distribution of the reflected light from concentrated specular reflection (reflection angle = incident angle) to divergent diffuse reflection (reflection angle distribution ±45°), and the light intensity in a single direction is reduced to 15% - 20% of the original intensity.

[0136] The anti-reflection film on the surface layer further cancels the phase of the remaining specular reflected light through the principle of optical interference: when the optical path difference between the two beams of light reflected from the coating surface and the substrate surface of the incident light is an odd multiple of half a wavelength, destructive interference occurs, and the reflected light intensity is further reduced by 30%-40%, ultimately making the reflected light intensity received by the driver ≤ 1500 cd / m 2 (The comfortable threshold of the human eye ≤ 2000 cd / m 2 ), avoiding visual persistence and blind spots caused by glare.

[0137] It should be noted that the control method of this application can be automatically controlled through a controller. The control method of the controller can be realized by simple programming by those skilled in the art, which belongs to the common knowledge in this field. And this application is mainly used to protect the mechanical structure, so the control method and circuit connection of this application will not be explained in detail.

[0138] It should be noted that for special vehicles such as large trucks that require more coverage of blind spots, this solution supports adding standard modular auxiliary mirror devices 3 at multiple end edges (such as the top, bottom, or left side) of the rearview mirror body 2. The mounting brackets 31 of each auxiliary mirror device 3 can be respectively fixed at different positions of the rearview mirror body 2. Each auxiliary mirror surface 32 can be electrically adjusted through independent first adjustment components 33 and second adjustment components 34 to form a vision monitoring system with multiple mirrors working together. By expanding the quantity and layout of the mounting brackets 31, complex areas such as the side blind spot, wheel arch blind spot, and cargo box tail blind spot of large trucks can be targeted. The horizontal deflection (driven by the first adjustment component 33) and vertical deflection (driven by the second adjustment component 34) ranges of each auxiliary mirror surface 32 can be independently configured according to actual needs, and each adjustment component is connected to the control system 4 through the CAN bus 11 to achieve linkage control or independent control of the angles of multiple mirrors. This modular design provides a customized multi-perspective solution for special vehicle models while maintaining the overall vehicle appearance integration - for example, retaining the original auxiliary mirror device 3 at the right end edge of the rearview mirror body 2 to cover the right rear blind spot, and at the same time adding another auxiliary mirror device 3 at the top to monitor the top area of the cargo box. The anti-glare coating 6 and shock-absorbing rubber pad 5 and other protective structures of each auxiliary mirror surface 32 are synchronously adapted to further improve driving safety in different scenarios.

[0139] Specifically, taking the reverse scenario of a left-hand drive vehicle as an example, the driver needs to observe the relative position between the right rear wheel and the ground marking through the auxiliary mirror surface 32. The specific adjustment process is as follows:

[0140] 1. Command input and signal transmission:

[0141] The driver presses the rearview mirror adjustment combination button (horizontal left adjustment + vertical downward adjustment) located on the cockpit door panel, and the signal is transmitted through the wire to the vehicle-mounted control system 4. After the control system 4 analyzes the instruction, it sends an instruction of "contract 15 mm" to the first electric push rod 338 of the first adjustment component 33 through the CAN bus 11, and at the same time sends an instruction of "contract 10 mm" to the second electric push rod 343 of the second adjustment component 34.

[0142] 2. The first adjustment component 33 drives the horizontal left deviation:

[0143] After the first electric push rod 338 receives the instruction, the internal DC motor rotates counterclockwise, driving the screw rod to retract, and the push rod body moves towards the base at a speed of 15 mm / s. The end of the push rod pulls the first hinge plate 336 to rotate counterclockwise through the transmission link 337, driving the sliding plate 335 to slide 15 mm to the left along the linear slide rail 334. The silica gel damping block 3351 at the front end of the sliding plate 335 pulls the bottom edge of the auxiliary mirror 32 to move to the left, causing the auxiliary mirror 32 to deflect 12° to the left in the horizontal plane around the ball hinge connection point of the mounting bracket 31 (corresponding to the horizontal adjustment range of ±25°).

[0144] 3. The second adjustment component 34 drives the vertical downward adjustment:

[0145] The second electric push rod 343 synchronously receives the instruction of "contract 10 mm", the motor rotates clockwise, and the push rod body retracts at a speed of 12 mm / s. The end of the push rod pulls the second hinge plate 342 to rotate downward around the rotating shaft of the mounting base 341 through the spherical plain bearing, driving the upper end of the back of the auxiliary mirror 32 to swing downward, causing the auxiliary mirror 32 to deflect 8° in the vertical plane (corresponding to the vertical adjustment range of -10° to +15°).

[0146] 4. Ball hinge linkage and vibration buffering:

[0147] During the deflection of the auxiliary mirror 32, the spherical socket structure of the ball hinge support 333 slides along the spherical connection part of the ball head link 332, automatically compensating for the composite displacement of horizontal and vertical adjustments to ensure smooth rotation of the mirror without jamming. At the same time, the shock-absorbing rubber pad 5 between the mounting frame 1 and the vehicle body absorbs the high-frequency vibration (20 - 200 Hz) generated by the road bumps during reverse parking, reducing the vibration acceleration by 70% through elastic deformation and microporous damping, and preventing the auxiliary mirror 32 from deviating in angle due to vibration.

[0148] 5. Field of view optimization and anti-glare effect:

[0149] After the adjustment is completed, the anti-glare coating 6 of the auxiliary mirror 32 scatters and interferes with the strong light of the rear vehicle's taillights: the underlying silica nanoparticles decompose the direct light into ±45° diffuse reflected light, and the light intensity is reduced to 18% of the original intensity; the surface layer titanium dioxide antireflection film further weakens the specular reflection through optical path difference interference. Finally, the reflected light intensity received by the driver ≤ 1500 cd / m 2 , clearly observing the ground markings near the right rear wheel without glare interference.

[0150] In summary, an automotive rearview mirror with an electrically adjustable auxiliary view angle according to an embodiment of the present application realizes the electric adjustment of the horizontal and vertical angles of the auxiliary mirror through an in-vehicle control system without manual operation. The first and second adjustment components are independently driven to achieve universal angle adjustment, covering the visual blind area. The ball joint support and the linear slide rail cooperate, combined with shock-absorbing rubber pads, reducing the angular deviation caused by vibration, ensuring the adjustment accuracy, and enhancing driving safety.

[0151] In the description of this specification, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present application, "a plurality" means at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0152] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0153] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present application. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present application.

Claims

1. An automotive rearview mirror with an electrically adjustable auxiliary viewing angle, characterized in that, It includes a mounting bracket (1), a rearview mirror body (2), an auxiliary rearview mirror device (3), and a control system (4). Among them, the mounting bracket (1) is configured to be mounted on the side of the vehicle body; the rearview mirror body (2) is rotatably mounted on the front side of the mounting bracket (1); the auxiliary rearview mirror device (3) includes a mounting bracket (31), an auxiliary mirror surface (32), a first adjustment component (33), and a second adjustment component (34). Among them, the mounting bracket (31) is fixedly arranged at the end edge of the rearview mirror body (2); the auxiliary mirror surface (32) is movably arranged on the mounting bracket (31); the first adjustment component (33) is arranged inside the rearview mirror body (2), and its output end is connected to the auxiliary mirror surface (32) for driving the auxiliary mirror surface (32) to deflect in the horizontal plane; the second adjustment component (34) is arranged inside the rearview mirror body (2), and its output end is connected to the auxiliary mirror surface (32) for driving the auxiliary mirror surface (32) to deflect in the vertical plane; both the first adjustment component (33) and the second adjustment component (34) are electrically connected to the vehicle-mounted control system (4).

2. The automotive rearview mirror with an electrically adjustable auxiliary viewing angle according to claim 1, characterized in that, The first adjustment component (33) includes a support frame (331), a ball head connecting rod (332), a ball hinge support (333), a linear slide rail (334), a sliding plate (335), a first hinge plate (336), a transmission connecting rod (337), and a first electric push rod (338). Among them, the support frame (331) is fixedly arranged in the middle of the inner cavity of the rearview mirror body (2); the ball head connecting rod (332) is vertically fixed at the front end of the support frame (331), and a spherical connection part is formed at its end; the first end of the ball hinge support (333) is fixedly connected to the back of the auxiliary mirror surface (32), and the second end is provided with a ball socket structure adapted to the ball head connecting rod (332), and the ball socket structure and the spherical connection part cooperate to form a universal movable connection; the linear slide rail (334) is arranged in parallel on the side wall of the inner cavity of the rearview mirror body (2); the sliding plate (335) is slidably embedded on the linear slide rail (334), and its front end is connected to the bottom edge of the auxiliary mirror surface (32) through a silica gel damping block (3351); the first hinge plate (336) is pivotally connected to the other end of the sliding plate (335) through a rotating shaft; the first end of the transmission connecting rod (337) is fixedly connected to one end of the first hinge plate (336); the base of the first electric push rod (338) is fixed on the rear wall of the inner cavity of the rearview mirror body (2), and the end of its push rod is hinged to the second end of the transmission connecting rod (337).

3. The automotive rearview mirror with an electrically adjustable auxiliary viewing angle according to claim 2, characterized in that, The second adjustment component (34) includes a mounting base (341), a second hinge plate (342), and a second electric push rod (343). Among them, the mounting base (341) is mounted on the upper end of the back of the auxiliary mirror surface (32); the second hinge plate (342) is pivotally connected to the mounting base (341) through a universal joint; The base of the second electric push rod (343) is fixed to the side of the support frame (331), and the end of its push rod is hinged to one end of the second hinge plate (342).

4. A vehicle rearview mirror with an electrically adjustable auxiliary viewing angle according to any one of claims 1-3, characterized in that, Both the first electric push rod (338) and the second electric push rod (343) are connected to the control system (4) through the CAN bus (11). The control system (4) is configured to receive external adjustment signals and control the telescopic strokes of the first electric push rod (338) and the second electric push rod (343) to achieve the angular linkage adjustment of the auxiliary mirror surface (32).

5. A motor vehicle rearview mirror with an electrically adjustable auxiliary viewing angle according to claim 1, characterized in that, A shock-absorbing rubber pad (5) is provided between the mounting bracket (1) and the side of the vehicle body to reduce the influence of vibrations generated during vehicle driving on the rearview mirror body (2) and the auxiliary rearview mirror device (3).

6. The automotive rearview mirror with an electrically adjustable auxiliary viewing angle according to claim 1, characterized in that, The surface of the auxiliary mirror surface (32) is coated with an anti-glare coating (6), which can effectively reduce light reflection and improve the vision clarity of the driver in night or strong light environments.

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