Vehicle-mounted camera sliding protection device

Abstract

The utility model relates to a vehicle-mounted camera sliding protection device, which comprises a shell, a driving mechanism, a transmission gear set, a translation output assembly, a protection cover body and a position switch, and is characterized in that the driving mechanism comprises a motor and a driving transmission part; the transmission gear set is composed of at least one duplicate gear, and the duplicate gear comprises an upper-layer gear and a lower-layer gear which are different in diameter. The translation output assembly comprises a rack, and the rack is meshed with a lower-layer gear or an upper-layer gear of a last-stage duplicate gear of the transmission gear set and slides along the sliding groove. The protective cover body is fixed on the rack and synchronously moves along with the rack; the position switch is arranged corresponding to the rack stroke termination area and provided with a wedge-shaped matching face matched with the rack limiting protrusion. According to the vehicle-mounted camera sliding protection device provided by the utility model, through unique structural design and cooperative work of components, effective protection of the vehicle-mounted camera is realized, and meanwhile, the requirements of intelligent development of vehicles on high precision and intelligence of the camera protection device are met.

Description

TECHNICAL FIELD

[0001] The utility model relates to vehicle equipment technical field, concretely relates to a vehicle camera sliding protection device. BACKGROUND

[0002] With the development of automotive intelligence, vehicle cameras play an increasingly important role in vehicle safety driving assistance systems (ADAS), autonomous driving, and driving record, etc. However, vehicle cameras face many challenges during use, such as vibration during vehicle driving, impact of external objects, and influence of harsh environmental factors (such as dust, rain, etc.), which may cause damage to camera lenses or affect their imaging quality, and further affect the normal operation of related systems.

[0003] Some existing vehicle camera protection measures have many shortcomings. Some protection structures are too simple and cannot effectively resist strong external impact; some designs use fixed protective covers that cannot completely avoid the imaging area when the camera is working, affecting the shooting effect; some protection devices have defects in positioning accuracy and state feedback, making it difficult to achieve precise control and intelligent monitoring. Therefore, a sliding protection device is needed that can effectively protect the vehicle camera, has precise positioning and state feedback functions, and has a compact structure and is easy to maintain. SUMMARY

[0004] Therefore, the utility model provides a vehicle camera sliding protection device to solve the problems of poor protection effect, inaccurate positioning, imperfect state feedback, and inconvenient maintenance of existing vehicle camera protection devices. Through unique structural design and component cooperation, effective protection of the vehicle camera is achieved, and the high-precision and intelligent requirements of camera protection devices for vehicle intelligent development are met.

[0005] The purpose of the utility model is achieved through the following technical solutions:

[0006] The application discloses a sliding protection device for a vehicle-mounted camera, which comprises a shell, a driving mechanism, a transmission gear set, a translation output assembly, a protective cover and a position switch. The driving mechanism comprises a motor and a driving transmission part driven by a motor output shaft. The transmission gear set is composed of at least one double gear, which comprises upper gears and lower gears with different diameters. The upper gear or the lower gear of the first double gear is engaged with the driving transmission part. The translation output assembly comprises a rack, which is engaged with the lower gear or the upper gear of the last double gear of the transmission gear set and slides along a sliding groove. The protective cover is fixed to the rack and moves synchronously with the rack. The position switch is arranged corresponding to the stroke termination area of the rack and has a wedge-shaped matching surface matched with a rack limiting protrusion. When the rack translates to the first stroke termination position, the protective cover completely covers the camera lens to form a protection state. When the rack moves to the second stroke termination position, the protective cover completely retreats to the outside of the lens imaging area to form a working state. At this time, the limiting protrusion is wedge-shaped matched with the position switch to trigger an electric signal, which represents that the lens is in a working state.

[0007] Through the unique structural design and the cooperation of components, the vehicle-mounted camera is effectively protected, and the high precision and intelligentization demand of the camera protection device for the intelligent development of vehicles is met.

[0008] Transmission efficiency and precision optimization: the upper gears and the lower gears of the double gear are designed with different diameters, the flexible reduction ratio is realized through multi-stage transmission, the amplification demand of the motor output torque is met (for example, a large-diameter gear is used as an input end), and the positioning deviation caused by the traditional single gear transmission due to a gear gap is avoided, so that the repeat positioning precision of the rack translation is ensured.

[0009] Mechanical and electrical signal double feedback: the wedge-shaped matching surface design of the stroke termination position of the rack prevents overstroke movement (avoids damage to the lens caused by the overstroke movement of the protective cover) on one hand, and the wedge-shaped contact of the limiting protrusion and the position switch triggers an electric signal on the other hand, so that the lens working state (for example, a CAN bus signal) is directly fed back to a vehicle-mounted control system, and the double protection of mechanical protection and intelligent monitoring is realized.

[0010] Compactness of space layout: the upper and lower structures of the double gear can be vertically stacked and arranged, the horizontal space occupation is reduced compared with a parallel shaft gear set, the limited installation space of the vehicle-mounted camera is adapted, and the double gear is especially suitable for narrow areas such as rearview mirror integrated cameras.

[0011] Preferably, the limiting protrusion is provided with a front guide slope, a trigger guide rod of the position switch is provided with a matching guide slope, and a one-way trigger mechanism is formed: when the protective cover moves from the protection state to the working state, the front guide slope is in contact with the guide slope to generate a radial component force, so that the trigger guide rod is forced to contract radially to trigger the switch; when the protective cover moves reversely, the front guide slope is in plane contact with the end surface of the trigger guide rod, and the switch is kept in an open state.

[0012] The slope-guided one-way triggering mechanism solves the problem of false triggering in bidirectional movement and prolongs the service life of the switch. The cooperation of the front slope and the guide slope only generates a radial force when the protective cover moves from the protection state to the working state (i.e. the end of the positive stroke of the rack), forcing the triggering guide rod to retract and trigger the switch, and when moving in the opposite direction (resetting the protective cover), the planar contact cannot compress the guide rod, avoiding false triggering of the electrical signal causing the system to misjudge the lens state. The planar contact mode when moving in the opposite direction reduces the axial force on the triggering guide rod, avoiding metal fatigue caused by frequent compression and rebound of the guide rod, prolonging the service life of the micro switch (especially suitable for high-frequency opening and closing scenarios). The self-centering feature of the slope can compensate for the assembly error of the rack and the position switch, so that reliable triggering can still be achieved even with slight positional deviations, improving production consistency.

[0013] Preferably, the protective cover is provided with a mounting boss, and the rack is provided with a locking screw hole at a corresponding position, and the detachable connection of the protective cover and the rack is achieved by a fastening screw penetrating through the mounting boss.

[0014] Modular and detachable design improves maintenance efficiency and product adaptability. The protective cover and the rack are connected by a locking screw, without the need to disassemble the transmission mechanism to replace the cover alone (for example, to match different shapes of protective covers for different vehicle camera models), which shortens the repair time and reduces the cost of spare parts inventory. The contact surface of the mounting boss and the rack can be designed as a concave-convex fitting structure to disperse the lateral impact force on the cover, avoiding the problem of thread slipping caused by the screw directly bearing the shear force, especially suitable for high-vibration scenarios of off-road vehicles. The protective cover can be made of transparent polycarbonate (scratch-resistant) or metal material (flystone impact-resistant), which can adapt to different protection needs through a unified interface, enhancing the flexibility of product series development.

[0015] Preferably, the driving member is a worm structure, which is fixed to the motor output shaft by interference fit.

[0016] The worm drive realizes high torque and self-locking function, avoiding accidental displacement in non-driving state. The meshing of the worm and the double gear has a one-way transmission characteristic, which automatically locks the rack position when the motor is stopped, preventing accidental sliding of the protective cover caused by vehicle vibration or external force impact (such as high-pressure water gun impact during car washing). The worm and the motor output shaft are fixed by interference fit, eliminating the risk of looseness that may be caused by keyway or top screw connection, ensuring the axial concentricity under high torque transmission, and reducing the transmission noise. The worm can be made of nylon or powder metallurgy material to reduce the gear meshing noise, and the hollow design of the shell enhances the air flow in the worm area, avoiding the influence of temperature rise during continuous operation of the motor.

[0017] Preferably, the driving member is a cylindrical gear, and the motor installation orientation is adjusted to be orthogonal to the driving axis and the transmission gear set axis.

[0018] The orthogonal gear arrangement optimizes space utilization and adapts to diversified installation scenarios. The axes of the cylindrical gear and the double gear are orthogonal at 90°, allowing the motor to be arranged transversely to the side of the transmission gear set, which is suitable for flat design requirements of the camera mounted close to the surface of the vehicle body (such as the windshield top camera). The cylindrical gear engagement has lower friction loss than the worm drive, which is suitable for new energy vehicles sensitive to power consumption, and the torque output demand is compensated by the reduction ratio of the double gear. The orthogonal gear set can be designed in a split housing to achieve quick opening and maintenance, without the need to disassemble the motor to replace the worn gears, reducing the complexity of after-sales maintenance.

[0019] Preferably, the driving mechanism is installed in the housing through an elastic damping assembly, and the elastic damping assembly includes a buffer pad made of rubber or silicone.

[0020] The elastic damping assembly isolates motor vibration to ensure camera imaging quality. The rubber / silicone buffer pad absorbs high-frequency vibration during motor start-stop and high-speed operation, preventing vibration from being transmitted to the camera module through the housing, and avoiding video image shaking and blurring (especially affecting the target recognition accuracy of the ADAS system). The buffer pad also fills the assembly gap between the motor and the housing, suppresses transmission noise leakage, and prevents water or dust from entering through the installation gap, improving the IP protection level. The silicone material can maintain elasticity in the range of -40°C to 120°C, suitable for vehicle environments in extremely cold or high-temperature areas, avoiding performance degradation of traditional spring dampers due to metal fatigue or low-temperature embrittlement.

[0021] Preferably, it also includes a control circuit board electrically connected to the motor through wires to provide driving power and motion control signals, and the position switch is arranged on the control circuit board.

[0022] The control circuit board is designed in an integrated manner to realize the integration of driving and state monitoring functions. The position switch is directly soldered to the circuit board, reducing the risk of poor contact caused by traditional wire harness connection, and eliminating electromagnetic interference (such as motor brush spark interference) through onboard filtering circuit to ensure stable transmission of state signals to the vehicle ECU. The circuit board can integrate a current detection module to monitor motor locked-rotor or overload current in real time, triggering emergency shutdown protection (such as blocking the moving path of the protective cover by foreign matter), and avoiding motor burnout. The circuit board can be designed in an L-shaped or U-shaped structure, surrounding the motor and gear set layout, maximizing the use of internal space of the housing, and supporting ultra-thin camera module design.

[0023] Preferably, the transmission gear set is composed of a single double gear; the upper gear or lower gear of the double gear is engaged with the driving transmission member, and the lower gear or upper gear is directly engaged with the rack.

[0024] Single-stage double gear simplifies the transmission chain, reduces the failure rate and production cost. A single double gear replaces a multi-stage gear set, reducing the number of parts and assembly processes (such as gear shaft alignment adjustment steps), and is suitable for cost-sensitive mass production vehicle models. By reasonably designing the upper and lower gear ratio of the double gear, sufficient reduction ratio can be achieved in single-stage transmission (for example, fewer teeth on the upper gear and more teeth on the lower gear), which meets the rack moving speed requirement and avoids the cumulative backlash error of multi-stage transmission. Single gear structure has fewer failure points, and only needs to replace a single double gear after wear to restore performance, reducing the difficulty of after-sales maintenance and spare parts management cost.

[0025] The beneficial effects of the utility model compared with the prior art are:

[0026] The vehicle-mounted camera sliding protection device of the utility model realizes effective protection of the vehicle-mounted camera through unique structural design and component cooperation, and meets the high-precision and intelligentization requirements of the camera protection device for the intelligent development of vehicles.

[0027] Transmission efficiency and precision optimization: The upper and lower gears of the double gear are designed with different diameters, and the reduction ratio is flexibly adjusted through multi-stage transmission, which meets the amplification requirement of the motor output torque (for example, a large-diameter gear as an input end), avoids the positioning deviation caused by the backlash of the traditional single gear transmission, and ensures the repeat positioning accuracy of the rack translation.

[0028] Mechanical and electrical signal double feedback: the wedge-shaped matching surface design of the rack stroke termination position prevents overshoot (avoids damage to the lens due to overstroke movement of the protective cover) on one hand, and triggers the electrical signal through the wedge-shaped contact of the limit protrusion and the position switch on the other hand, directly feeds back the lens working state (such as CAN bus signal) to the vehicle-mounted control system, realizes the double protection of mechanical protection and intelligent monitoring.

[0029] Compactness of space layout: the upper and lower structures of the double gear can be vertically stacked, which reduces the horizontal space occupation compared with the parallel shaft gear set, adapts to the limited installation space of the vehicle-mounted camera, and is especially suitable for narrow areas such as rearview mirror integrated camera. BRIEF DESCRIPTION OF DRAWINGS

[0030] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0031] Figure 1 It is a partial structure diagram of the vehicle-mounted camera sliding protection device of an embodiment of the utility model.

[0032] Figure 2 Figure 2 is a partial structural view of another state of the vehicle-mounted camera sliding protection device according to an embodiment of the present application.

[0033] Figure 3 Figure 3 is a partial structural view of the vehicle-mounted camera sliding protection device without removing the control circuit board according to an embodiment of the present application.

[0034] Figure 4 Figure 4 is a schematic view of the lens of the vehicle-mounted camera sliding protection device in a working state according to an embodiment of the present application.

[0035] Figure 5 Figure 5 is a schematic view of the lens of the vehicle-mounted camera sliding protection device in a protection state according to an embodiment of the present application.

[0036] Label explanation:

[0037] The shell (1), the driving mechanism (2), the motor (21), the driving member (22), the transmission gear set (3), the double gear (31), the upper gear (311), the lower gear (312), the translation output assembly (4), the rack (41), the sliding groove (42), the limiting protrusion (43), the front guide slope (431), the protective cover (5), the mounting boss (51), the fastening screw (52), the position switch (6), the trigger guide rod (61), the guide slope (611), the control circuit board (7), the wire (71), the lens (01). DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are some embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0039] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the scope of protection of the present application.

[0040] It should be noted that similar reference numerals and letters refer to like items throughout the accompanying drawings, and therefore, once an item is defined in one drawing, it is not necessary to further define and explain it in subsequent drawings. In the description of the embodiments of the present application, it should be understood that the terms "upper", "lower", "left", "right", "vertical", "horizontal", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly understood by those skilled in the art, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0041] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0042] The technical solutions in the present application will be described below with reference to the accompanying drawings.

[0043] The present embodiment provides a kind of vehicle-mounted camera sliding protection device, including shell 1, drive mechanism 2, transmission gear set 3, translation output assembly 4, protective cover 5 and position switch 6.Drive mechanism 2 includes motor 21 and by the driving member 22 of motor 21 output shaft;Transmission gear set 3 is made of two double gear 31, double gear 31 includes different diameter upper gear 311 and lower gear 312, wherein the lower gear 312 of first double gear 31 is engaged with driving member 22;Translation output assembly 4 includes rack 41, rack 41 is engaged with the upper gear 311 of last double gear 31 of transmission gear set 3 and along sliding slot 42 sliding;Protective cover 5 is fixed to rack 41 and synchronously moves with it;Position switch 6 is set corresponding to the stroke termination area of rack 41, with wedge-shaped mating surface matched with rack 41 limit protrusion 43.Therein, when rack 41 translation reaches first stroke termination position, protective cover 5 completely shields camera lens 01 and forms protective state;When rack 41 moves to second stroke termination position, protective cover 5 completely retreats to the imaging area outside lens and forms working state, limit protrusion 43 and position switch 6 form wedge-shaped cooperation and trigger electrical signal at this time, indicating that lens 01 is in working state.

[0044] Through the cooperative design of double gear 31 transmission and position switch 6, the precise positioning of protective cover 5 and state feedback integration are realized.

[0045] Transmission efficiency and precision optimization: The upper gear 311 and the lower gear 312 of the double gear 31 are designed with different diameters, and the flexible reduction ratio is achieved through multi-stage transmission. This not only meets the amplification demand of the motor 21 output torque, such as using a large-diameter gear as the input end, but also avoids the positioning deviation caused by the traditional single gear transmission due to the backlash, ensuring the repeat positioning accuracy of the rack 41 translation.

[0046] Mechanical and electrical signal double feedback: The wedge-shaped matching surface design of the rack 41 stroke termination position prevents overshoot through physical limiting, avoiding damage to the camera lens 01 caused by overstroke movement of the protective cover 5. On the other hand, the wedge-shaped contact between the limiting protrusion 43 and the position switch 6 triggers an electrical signal, directly feeding back the lens 01 working state to the vehicle control system, such as CAN bus signal, realizing double protection of mechanical protection and intelligent monitoring.

[0047] Compact spatial layout: The upper and lower structures of the double gear 31 can be vertically stacked, reducing the horizontal space occupation compared to parallel shaft gear sets, adapting to the limited installation space of vehicle-mounted cameras, especially for narrow areas such as rearview mirror integrated cameras.

[0048] In this embodiment, the limiting protrusion 43 is provided with a front guide slope 431, and the trigger guide rod 61 of the position switch 6 is provided with a matching guide slope 611, forming a one-way trigger mechanism: when the protective cover 5 moves from the protection state to the working state, the front guide slope 431 and the guide slope 611 contact to generate a radial component force, forcing the trigger guide rod 61 to contract radially and trigger the switch; when moving in the opposite direction, the front guide slope 431 and the end surface of the trigger guide rod 61 form a plane contact, maintaining the switch in the normally open state.

[0049] The one-way trigger mechanism of the slope guide solves the problem of false triggering in bidirectional motion, prolonging the service life of the switch. The cooperation between the front guide slope 431 and the guide slope 611 only occurs when the protective cover 5 moves from the protection state to the working state, i.e., at the end of the positive stroke of the rack 41, generating a radial component force that forces the trigger guide rod 61 to contract and trigger the switch. When moving in the opposite direction, the protective cover 5 resets, and the plane contact cannot compress the guide rod, avoiding false triggering of the electrical signal that causes the system to misjudge the lens 01 state. The plane contact mode when moving in the opposite direction reduces the axial stress of the trigger guide rod 61, avoiding metal fatigue caused by frequent compression and rebound of the guide rod, prolonging the service life of the micro switch, especially suitable for high-frequency opening and closing scenarios. The self-centering property of the slope can compensate for the assembly error of the rack 41 and the position switch 6, reliably triggering even with slight positional deviation, improving production consistency.

[0050] In this embodiment, the protective cover 5 is provided with a mounting boss 51, and the rack 41 is provided with a locking screw hole at the corresponding position. The detachable connection between the protective cover 5 and the rack 41 is achieved through the fastening screw 52 penetrating the mounting boss 51.

[0051] Modular and detachable design improves maintenance efficiency and product adaptability. The protective cover 5 and the rack 41 are connected by locking screws, so the cover 5 can be replaced without disassembling the transmission mechanism 2. For example, different shapes of protective covers are matched with different camera models for different vehicle models, which shortens the repair time and reduces the cost of spare parts inventory. The contact surface between the mounting boss 51 and the rack 41 can be designed as a concave-convex fitting structure to disperse the lateral impact force on the cover 5, avoiding the problem of thread slipping caused by the screw directly bearing the shear force, especially suitable for high-vibration scenes of off-road vehicles. The protective cover 5 can be made of transparent polycarbonate, scratch-resistant, or metal material, flystone impact-resistant, and through a unified interface to adapt to different protection needs, enhancing the flexibility of product series development.

[0052] In this embodiment, the driving member 22 is a worm structure, which is fixed to the output shaft of the motor 21 by interference fit.

[0053] The worm drive realizes high torque and self-locking function, avoiding accidental displacement in the non-driving state. The meshing of the worm and the double gear 31 has one-way transmission characteristics, which automatically locks the position of the rack 41 when the motor 21 is stopped, preventing the protective cover 5 from accidentally sliding due to vehicle vibration or external impact, such as high-pressure water gun impact during car washing. The worm and the output shaft of the motor 21 are fixed by interference fit, eliminating the risk of looseness that may be caused by keyway or top screw connection, ensuring the axial concentricity under high torque transmission, and reducing transmission noise. The worm can be made of nylon or powder metallurgy material to reduce gear meshing noise, and through the hollow design of the housing 1 to enhance air flow in the worm area, avoiding the influence of temperature rise when the motor 21 works continuously.

[0054] In other embodiments, the driving member 22 can be replaced by a cylindrical gear, and the installation direction of the motor 21 is adjusted to be orthogonal to the driving gear set 3.

[0055] Orthogonal gear arrangement optimizes space utilization and adapts to diversified installation scenarios. The cylindrical gear and the double gear 31 are orthogonal with an axis of 90°, allowing the motor 21 to be arranged laterally to the driving gear set 3, which is suitable for flat design requirements such as windshield top camera that needs to be installed close to the vehicle surface. The cylindrical gear meshing has lower friction loss than the worm drive, which is suitable for new energy vehicles sensitive to power consumption, and the torque output demand is compensated by the reduction ratio of the double gear 31. The orthogonal gear set can be designed in a split type to realize quick opening and maintenance, and the worn gear can be replaced without disassembling the motor 21, reducing the complexity of after-sales maintenance.

[0056] In this embodiment, the driving mechanism 2 is installed on the housing 1 through an elastic damping assembly, which includes a buffer pad made of rubber or silicone.

[0057] The elastic damping assembly isolates the motor 21 vibration, ensuring the camera imaging quality. The rubber / silicone buffer pad absorbs the high-frequency vibration of the motor 21 during start-stop and high-speed operation, preventing the vibration from being transmitted to the camera module through the shell 1, avoiding the video image from shaking and blurring, especially affecting the target recognition accuracy of the ADAS system. The buffer pad fills the assembly gap between the motor 21 and the shell 1, suppresses the transmission of noise, and prevents water or dust from entering through the installation gap, improving the IP protection level. The silicone material can maintain elasticity in the range of -40°C to 120°C, suitable for vehicle environments in extremely cold or high-temperature areas, avoiding performance degradation of traditional spring dampers due to metal fatigue or low-temperature embrittlement.

[0058] In the present embodiment, a control circuit board 7 is further included, which is electrically connected with the motor 21 through a wire 71 to provide driving power and motion control signals, and the position switch 6 is arranged on the control circuit board 7.

[0059] The control circuit board 7 is designed in an integrated manner to realize the integration of driving and state monitoring functions. The position switch 6 is directly welded on the circuit board, reducing the risk of poor contact caused by traditional wire harness connection, and eliminating electromagnetic interference such as motor 21 brush spark interference through the on-board filter circuit, ensuring stable transmission of the state signal to the vehicle ECU. The circuit board can integrate a current detection module to monitor the motor 21 locked-rotor or overload current in real time, triggering emergency shutdown protection, such as when the protective cover 5 moving path is blocked by foreign matter, to prevent the motor 21 from burning out. The circuit board can be designed in an L-shaped or U-shaped structure, surrounding the motor 21 and gear set layout, maximizing the use of the internal space of the shell 1, supporting the design of ultra-thin camera modules.

[0060] In other embodiments, the transmission gear set 3 can be composed of a single double gear 31; the upper gear 311 or the lower gear 312 of the double gear 31 is engaged with the driving transmission member 22, and the lower gear 312 or the upper gear 311 is directly engaged with the rack 41.

[0061] The single-stage double gear 31 simplifies the transmission chain, reduces the failure rate and production cost. The single double gear 31 replaces the multi-stage gear set, reducing the number of parts and assembly processes, such as gear shaft alignment adjustment steps, suitable for cost-sensitive mass production vehicle models. By reasonably designing the upper and lower gear ratio of the double gear 31, sufficient reduction ratio can be achieved in single-stage transmission, for example, the upper gear 311 has fewer teeth and the lower gear 312 has more teeth, which meets the speed requirement of the rack 41 and avoids the cumulative backlash error of multi-stage transmission. The single-gear structure has fewer failure points, and after wear, only the single double gear 31 needs to be replaced to restore performance, reducing the difficulty of after-sales maintenance and the cost of spare parts management.

[0062] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A sliding protection device for a vehicle-mounted camera, characterized in that, include: Shell (1); The drive mechanism (2) includes a motor (21) and an active transmission component (22) driven by the output shaft of the motor (21). The transmission gear set (3) is composed of at least one double gear (31), which includes an upper gear (311) and a lower gear (312) of different diameters, wherein the upper gear (311) or the lower gear (312) of the first-stage double gear (31) meshes with the driving transmission member (22); The translation output assembly (4) includes a rack (41), which meshes with the lower gear (312) or upper gear (311) of the final stage double gear (31) of the transmission gear set (3) and slides along the slide groove (42); The protective cover (5) is fixed to the rack (41) and moves synchronously with it; The position switch (6) is set in the travel end area of ​​the rack (41) and has a wedge-shaped mating surface that cooperates with the limiting protrusion (43) of the rack (41); When the rack (41) moves to the first stroke end position, the protective cover (5) completely covers the camera lens (01) to form a protective state; when the rack (41) moves to the second stroke end position, the protective cover (5) completely retreats to the outside of the lens imaging area to form a working state. At this time, the limiting protrusion (43) and the position switch (6) form a wedge-shaped engagement and trigger an electrical signal, indicating that the lens (01) is in a working state.

2. The vehicle-mounted camera sliding protection device according to claim 1, characterized in that, The limiting protrusion (43) is provided with a leading inclined surface (431), and the trigger rod (61) of the position switch (6) is provided with a matching guiding inclined surface (611), forming a one-way triggering mechanism: when the protective cover (5) moves from the protective state to the working state, the leading inclined surface (431) contacts the guiding inclined surface (611) to generate a radial component force, which forces the trigger rod (61) to radially retract and trigger the switch; when moving in the opposite direction, the leading inclined surface (431) and the end face of the trigger rod (61) form a planar contact, keeping the switch in the normally open state.

3. The vehicle-mounted camera sliding protection device according to claim 1, characterized in that, The protective cover (5) is provided with a mounting boss (51), and the rack (41) is provided with a locking screw hole at the corresponding position. The protective cover (5) and the rack (41) are detachably connected by a fastening screw (52) that passes through the mounting boss (51).

4. The vehicle-mounted camera sliding protection device according to claim 1, characterized in that, The active transmission component (22) is a worm gear structure, which is fixed to the output shaft of the motor (21) by an interference fit.

5. The vehicle-mounted camera sliding protection device according to claim 1, characterized in that, The active transmission component (22) is a cylindrical gear, and the motor (21) is installed in such a way that the drive axis is orthogonal to the axis of the transmission gear set (3).

6. The vehicle-mounted camera sliding protection device according to claim 1, characterized in that, The drive mechanism (2) is mounted on the housing (1) via an elastic damping component, which includes a cushioning pad made of rubber or silicone.

7. The vehicle-mounted camera sliding protection device according to claim 1, characterized in that, It also includes a control circuit board (7), which is electrically connected to the motor (21) via wires (71) to provide drive power and motion control signals, and the position switch (6) is disposed on the control circuit board (7).

8. The vehicle-mounted camera sliding protection device according to claim 1, characterized in that, The transmission gear set (3) is composed of a single double gear (31); the upper gear (311) or lower gear (312) of the double gear (31) meshes with the driving transmission component (22), and the lower gear (312) or upper gear (311) meshes directly with the rack (41).

Images