Drive mechanism and head-up display

Abstract

This application discloses a drive mechanism and a head-up display (HUD), relating to the field of HUD technology. The drive mechanism includes a mounting base, a mounting bracket, a motor, a worm gear, a helical gear, and a resilient abutment. The mounting bracket is rotatably disposed within the mounting base, and the worm gear is rotatably disposed within the mounting bracket. The motor is connected to the worm gear, and the worm gear meshes with the helical gear. The first end of the resilient abutment abuts against the inner wall of the mounting base, and the second end abuts against the outer wall of the mounting bracket. The resilient abutment drives the mounting bracket to move towards the side closer to the helical gear, thereby ensuring a tight fit between the worm gear and the helical gear. This drive mechanism eliminates the assembly clearance between the worm gear and the helical gear, thus preventing the worm gear from shifting during vehicle movement and improving the adjustment accuracy and reliability of the HUD reflector.

Description

Technical Field

[0001] This application relates to the field of head-up display technology, and more specifically, to a driving mechanism and a head-up display. Background Technology

[0002] Currently, HUD (Head-Up Display) devices installed in vehicles typically use a motor-driven worm gear to drive the HUD reflector, specifically by using the worm gear to drive a helical gear to adjust the angle of the HUD reflector. Due to assembly gaps, this not only results in low adjustment accuracy of the HUD reflector, but also causes the reflector to wobble under gravity during vehicle movement. This causes the worm gear to wobble and vibrate, easily leading to structural wear or abnormal motor noise, resulting in a high failure rate and short lifespan for the HUD device. Utility Model Content

[0003] The purpose of this application is to provide a drive mechanism and a head-up display that can eliminate the assembly clearance between the worm gear and the helical gear, thereby preventing the worm gear from moving during vehicle movement and improving the adjustment accuracy and reliability of the HUD reflector.

[0004] The embodiments of this application are implemented as follows:

[0005] A first aspect of this application provides a drive mechanism including a mounting base, a mounting bracket, a motor, a worm gear, a helical gear, and a resilient abutment. The mounting bracket is rotatably disposed within the mounting base, and the worm gear is rotatably disposed within the mounting bracket. The motor is connected to the worm gear, and the worm gear meshes with the helical gear. A first end of the resilient abutment abuts against the inner wall of the mounting base, and a second end abuts against the outer wall of the mounting bracket. The resilient abutment drives the mounting bracket to move towards the side closer to the helical gear, so that the worm gear and the helical gear are tightly engaged. This drive mechanism can eliminate the assembly clearance between the worm gear and the helical gear, thereby preventing the worm gear from shifting during vehicle movement and improving the adjustment accuracy and reliability of the HUD reflector.

[0006] In one possible implementation, the elastic abutment includes a V-shaped abutment portion and an L-shaped abutment portion connected to the V-shaped abutment portion. The free end of the V-shaped abutment portion abuts against the inner wall of the mounting base, the first folding arm of the L-shaped abutment portion abuts against the outer wall of the mounting bracket, and the second folding arm of the L-shaped abutment portion is located between the motor and the worm gear.

[0007] In one possible implementation, a fixing groove extending axially along the worm gear is provided on the outer wall of the mounting bracket, and snap fasteners are provided on opposite sides of the fixing groove. The first folding arm is accommodated within the limiting space formed by the fixing groove and the snap fasteners.

[0008] In one possible implementation, the second folding arm is provided with a limiting countersunk platform and a limiting buckle. The second folding arm contacts the motor housing of the motor. The motor housing is provided with a connecting lug. The limiting buckle engages with the connecting lug. The limiting countersunk platform is provided with a through hole. The output shaft of the motor and the worm gear are housed in the through hole of the limiting countersunk platform.

[0009] In one possible implementation, the second folding arm is provided with a mounting hole, and the connecting lug is provided with a connecting hole corresponding to the mounting hole. Fasteners are inserted into the connecting hole and the mounting hole to fix the second folding arm to the motor housing.

[0010] In one possible implementation, the connecting tip of the V-shaped abutment abuts against the inner wall of the mounting base on the side away from the motor.

[0011] In one possible implementation, the mounting bracket has an elastic abutment at the end away from the motor, the worm gear has an abutment surface at the end near the motor, and a corresponding support surface is provided on the mounting bracket. The elastic abutment is used to drive the mounting bracket to move toward the side near the motor so that the abutment surface abuts against the support surface.

[0012] In one possible implementation, the elastic support portion is a bow-shaped spring piece, and a limiting protrusion is provided on the mounting base corresponding to the bow-shaped spring piece. The two connecting portions of the bow-shaped spring piece are fixedly connected to the mounting bracket. One side of the main body of the bow-shaped spring piece abuts against the end of the worm gear away from the motor, and the other side abuts against the limiting protrusion.

[0013] In one possible implementation, the mounting base is provided with rotating shaft holes on opposite sides, and the mounting bracket is provided with connecting rotating shafts on opposite sides corresponding to the rotating shaft holes. The two connecting rotating shafts are rotatably disposed in the two rotating shaft holes in a one-to-one correspondence.

[0014] A second aspect of this application provides a head-up display (HUD) including a housing, a reflector, and the aforementioned drive mechanism. The reflector has a rotating shaft rotatably connected to the housing. The reflector is fixedly connected to the helical gear. A motor drives the worm gear to rotate, causing the helical gear to move along the worm gear, thereby causing the reflector to rotate around the rotating shaft. This drive mechanism eliminates the assembly clearance between the worm gear and the helical gear, thus preventing the worm gear from shifting during vehicle movement and improving the adjustment accuracy and reliability of the HUD reflector.

[0015] The beneficial effects of the embodiments of this application include:

[0016] The drive mechanism includes a mounting base, a mounting bracket, a motor, a worm gear, a helical gear, and a resilient abutment. The mounting bracket is rotatably mounted within the mounting base, and the worm gear is rotatably mounted within the mounting bracket. The motor is connected to the worm gear, and the worm gear meshes with the helical gear. The first end of the resilient abutment abuts against the inner wall of the mounting base, and the second end abuts against the outer wall of the mounting bracket. The resilient abutment drives the mounting bracket to move towards the side closer to the helical gear, ensuring a tight engagement between the worm gear and the helical gear. When the motor is powered on, it drives the worm gear to rotate synchronously. Due to the meshing of the worm gear and the helical gear, the rotational motion of the worm gear is converted into the rotation of the helical gear, which in turn transmits power to the subsequent mechanism (i.e., the reflector) connected to the helical gear, thus realizing the power output of the entire system. The resilient abutment maintains a constant elastic thrust between the mounting base and the mounting bracket, driving the mounting bracket to move towards the helical gear. This design ensures that the worm gear remains tightly meshed with the helical gear during transmission. Even when parts wear down during vehicle operation or after prolonged use, the elastic deformation of the elastic contact can automatically compensate for the assembly gap, ensuring that the meshing accuracy of the worm gear and the helical gear is not affected. This results in smoother transmission, provides a good power environment for the head-up display, and effectively reduces vibration and noise during transmission. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is one of the structural schematic diagrams of the head-up display provided in the embodiments of this application;

[0019] Figure 2 This is a second schematic diagram of the structure of the head-up display provided in the embodiments of this application;

[0020] Figure 3 A schematic diagram of the drive mechanism provided in the embodiments of this application;

[0021] Figure 4 One of the schematic diagrams illustrating the assembly process of the drive mechanism provided in the embodiments of this application;

[0022] Figure 5 A second schematic diagram illustrating the assembly process of the drive mechanism provided in an embodiment of this application;

[0023] Figure 6 The third schematic diagram of the assembly process of the drive mechanism provided in the embodiments of this application;

[0024] Figure 7 Fourth schematic diagram of the assembly process of the drive mechanism provided in the embodiments of this application;

[0025] Figure 8 for Figure 7 The main view;

[0026] Figure 9 A schematic diagram of the assembly structure of the elastic abutment and the mounting bracket provided in the embodiments of this application;

[0027] Figure 10 This is a schematic diagram of the mounting base provided in an embodiment of this application.

[0028] Icons: 100-Drive mechanism; 10-Mounting base; 11-Limiting protrusion; 12-Rotating shaft hole; 20-Mounting bracket; 21-Fixing groove; 22-Snap-fit ​​buckle; 23-Elastic support part; 231-Connecting part; 232-Main body; 24-Supporting surface; 25-Connecting rotating shaft; 30-Motor; 31-Motor housing; 32-Connecting ear; 40-Worm gear; 41-Supporting surface; 50-Helical gear; 60-Elastic abutment; 61-V-shaped abutment; 62-L-shaped abutment; 621-Limiting countersunk platform; 622-Limiting buckle; 623-Mounting hole; 70-Fastener; 200-Reflector; 201-Rotating shaft. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0030] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. These terms are used only for the convenience of describing this application and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "horizontal," "vertical," etc., do not indicate that the component must be absolutely horizontal or suspended, but can be slightly tilted. The terms "first," "second," and "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0031] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0032] Please refer to the reference. Figure 1 and Figure 2 This application provides a head-up display (HUD) including a housing, a reflector 200, and the aforementioned drive mechanism 100. The reflector 200 has a rotating shaft 201 rotatably connected to the housing. The reflector 200 is fixedly connected to a helical gear 50. A motor 30 drives a worm gear 40 to rotate, causing the helical gear 50 to move along the worm gear 40, thereby causing the reflector 200 to rotate around the rotating shaft 201. This drive mechanism 100 eliminates the assembly clearance between the worm gear 40 and the helical gear 50, thus preventing the worm gear 40 from shifting during vehicle movement and improving the adjustment accuracy and reliability of the HUD reflector 200.

[0033] Specifically, such as Figures 2 to 10 As shown, the drive mechanism 100 includes a mounting base 10, a mounting bracket 20, a motor 30, a worm gear 40, a helical gear 50, and an elastic abutment member 60. The mounting bracket 20 is rotatably disposed within the mounting base 10, and the worm gear 40 is rotatably disposed within the mounting bracket 20. The motor 30 is connected to the worm gear 40, and the worm gear 40 meshes with the helical gear 50. The first end of the elastic abutment member 60 abuts against the inner wall of the mounting base 10, and the second end abuts against the outer wall of the mounting bracket 20. The elastic abutment member 60 is used to drive the mounting bracket 20 to move toward the side closer to the helical gear 50, so that the worm gear 40 and the helical gear 50 are tightly engaged.

[0034] It should be noted that the drive mechanism 100 includes a mounting base 10, a mounting bracket 20, a motor 30, a worm gear 40, a helical gear 50, and a resilient abutment member 60. The mounting base 10 serves as the basic frame of the entire drive mechanism 100, providing a mounting reference for other components. The internal space of the mounting base 10 accommodates the mounting bracket 20 and related transmission components. The mounting bracket 20 is rotatably mounted within the mounting base 10, providing a motion basis for the meshing adjustment of the worm gear 40 and the helical gear 50. The motor 30 is connected to the worm gear 40. As the power source of the drive mechanism 100, it can convert electrical energy into mechanical energy to provide power input for the entire transmission system. The worm gear 40 is rotatably mounted in the mounting bracket 20 and is driven to rotate by the motor 30. Through the meshing of the worm gear 40 and the helical gear 50, the power transmission and speed conversion are realized. The helical gear 50 meshes with the worm gear 40, receives the power transmitted by the worm gear 40 and outputs it to drive the subsequent mechanism (i.e., the reflector 200) to move. The transmission method of the helical gear 50 meshing with the worm gear 40 has the characteristics of smooth transmission and low noise.

[0035] Based on this, the drive mechanism 100 provided in this application further includes an elastic abutment 60. Specifically, the first end of the elastic abutment 60 abuts against the inner wall of the mounting base 10, and the second end of the elastic abutment 60 abuts against the outer wall of the mounting bracket 20. For example, the elastic abutment 60 can be an elastic element such as a spring or sheet, which can generate thrust through its own elastic deformation. In this way, the elastic abutment 60 can drive the mounting bracket 20 to move towards the side closer to the helical gear 50, thereby ensuring a tight fit between the worm gear 40 and the helical gear 50.

[0036] When the motor 30 is powered on, it drives the worm 40 to rotate synchronously. Since the worm 40 meshes with the helical gear 50, the rotational motion of the worm 40 is converted into the rotation of the helical gear 50, which in turn transmits power to the subsequent mechanism connected to the helical gear 50 (i.e., the reflector 200), realizing the power output of the entire system. The elastic abutment 60 maintains an elastic thrust between the mounting base 10 and the mounting bracket 20, driving the mounting bracket 20 to move closer to the helical gear 50. This design ensures that the worm 40 maintains a tight mesh with the helical gear 50 throughout the transmission process. Even during vehicle operation or after prolonged use when parts wear, the elastic deformation of the elastic abutment 60 automatically compensates for the assembly gap, ensuring that the meshing accuracy of the worm 40 and the helical gear 50 is not affected.

[0037] In traditional HUD devices, the presence of assembly gaps not only results in low adjustment accuracy of the HUD reflector 200, but also causes it to wobble under gravity during vehicle movement. This also leads to significant movement and vibration of the worm gear 40, potentially causing structural wear or abnormal noise from the motor 30. This drive mechanism 100, through its elastic pre-tightening action, eliminates the assembly gaps between the worm gear 40 and the helical gear 50, resulting in smoother transmission and a better power environment for the head-up display. The tight meshing of the worm gear 40 and the helical gear 50 also effectively reduces vibration and noise during transmission.

[0038] As one possible implementation method, such as Figure 3 and Figure 4 As shown, the elastic abutment 60 includes a V-shaped abutment portion 61 and an L-shaped abutment portion 62 connected to the V-shaped abutment portion 61. The free end of the V-shaped abutment portion 61 abuts against the inner wall of the mounting base 10, the first folding arm of the L-shaped abutment portion 62 abuts against the outer wall of the mounting bracket 20, and the second folding arm of the L-shaped abutment portion 62 is located between the motor 30 and the worm gear 40.

[0039] It should be noted that, for example, the elastic abutment member 60 includes a V-shaped abutment portion 61, which utilizes the elastic deformation of the V-shaped structure to generate radial thrust, thereby driving the mounting bracket 20 to move toward the side closer to the helical gear 50, thus ensuring a tight fit between the worm gear 40 and the helical gear 50; furthermore, the elastic abutment member 60 also includes an L-shaped abutment portion 62 connected to the V-shaped abutment portion 61, with the free end of the V-shaped abutment portion 61 abutting against the inner wall of the mounting base 10, and the first folding arm of the L-shaped abutment portion 62 abutting against the outer wall of the mounting bracket 20, thereby enabling the V-shaped abutment to... The thrust of part 61 is converted into a tangential force that drives the mounting bracket 20 to rotate. When the meshing clearance between the worm 40 and the helical gear 50 increases, the mounting bracket 20 rotates towards the helical gear 50 under the action of the tangential force, so as to drive the worm 40 to move synchronously until the clearance is compensated, maintaining the meshing tightness and further ensuring the reliability of power transmission. The second folding arm of the L-shaped abutment part 62 is set between the motor 30 and the worm 40 to serve as an axial limiting structure for the worm 40, further preventing the worm 40 from axial movement and vibration, thereby further improving the smoothness of transmission.

[0040] As one possible implementation method, such as Figure 9 As shown, a fixing groove 21 extending axially along the worm gear 40 is provided on the outer wall of the mounting bracket 20, and snap fasteners 22 are provided on opposite sides of the fixing groove 21. The first folding arm is accommodated in the limiting space formed by the fixing groove 21 and the snap fasteners 22.

[0041] It should be noted that the design of the fixing groove 21 on the outer wall of the mounting bracket 20 and the snap fasteners 22 on both sides forms a precise limiting structure for the first folding arm of the L-shaped abutment part 62. Specifically, the fixing groove 21 extends along the axial direction of the worm gear 40, and the length, width, and depth of the fixing groove 21 match the length, width, and thickness of the first folding arm, ensuring that the first folding arm can slide freely within the fixing groove 21 without wobbling; the snap fasteners 22 are located on opposite sides of the fixing groove 21 and can be L-shaped or U-shaped protrusions, and their height should be slightly greater than the thickness of the first folding arm, thereby forming the movement gap required for elastic deformation.

[0042] During actual installation, the first folding arm is simply slidably inserted into the fixing groove 21. The snap-fit ​​buckles 22 on both sides of the fixing groove 21 can hold the first folding arm in place through elastic deformation (e.g., plastic snap-fit ​​buckles 22) or interference fit (e.g., metal snap-fit ​​buckles 22), thus forming a three-dimensional limiting space between the groove surface of the fixing groove 21 and the bottom surfaces of the snap-fit ​​buckles 22 on both sides. This not only positions and limits the installation of the elastic abutment 60, but also ensures that the first folding arm can only slide axially along the worm gear 40 within the fixing groove 21 and cannot detach radially. When the mounting bracket 20 rotates, the first folding arm slides axially within the fixing groove 21. The elastic deformation of the snap-fit ​​buckles 22 allows the first folding arm to have a certain amount of displacement, automatically compensating for the rotation angle error of the mounting bracket 20 and maintaining the stability of the abutment force.

[0043] As one possible implementation method, such as Figure 3 and Figure 4 As shown, the second folding arm is provided with a limiting countersunk platform 621 and a limiting buckle 622. The second folding arm contacts the motor housing 31 of the motor 30. The motor housing 31 is provided with a connecting lug 32. The limiting buckle 622 engages with the connecting lug 32. The limiting countersunk platform 621 is provided with a through hole. The output shaft of the motor 30 and the worm gear 40 are housed in the through hole of the limiting countersunk platform 621.

[0044] It should be noted that the second folding arm of the L-shaped abutment part 62 achieves precise positioning and limiting with the motor housing 31 of the motor 30 through the combined action of the limiting countersunk platform 621 and the limiting buckle 622. Specifically, the limiting countersunk platform 621 is provided with a through hole. During installation, simply align the limiting countersunk platform 621 of the second folding arm with the output shaft of the motor 30, so that the output shaft can pass into the through hole of the limiting countersunk platform 621. Then push the second folding arm until it is in close contact with the motor housing 31. At this time, the limiting buckle 622 engages with the connecting ear 32 to fix the second folding arm to the motor housing 31. Then align the worm gear 40 shaft with the limiting countersunk platform 621 of the second folding arm, so that the worm gear 40 can pass into the through hole of the limiting countersunk platform 621. Thus, the output shaft and the worm gear 40 can be coaxially installed through the limiting countersunk platform 621. In the above process, the through hole of the limiting countersunk stage 621 serves as a common guide hole for the output shaft and the worm 40 to ensure the coaxiality of the output shaft and the worm 40, thereby improving the uniformity of tooth surface wear between the worm 40 and the helical gear 50.

[0045] As one possible implementation method, such as Figures 3 to 5 As shown, the second folding arm is provided with a mounting hole 623, and the connecting ear 32 is provided with a connecting hole corresponding to the mounting hole 623. The fastener 70 passes through the connecting hole and the mounting hole 623 to fix the second folding arm to the motor housing 31.

[0046] It should be noted that the second folding arm of the L-shaped abutment part 62 also achieves rigid fixation to the motor housing 31 through a combination structure of mounting hole 623, connecting hole and fastener 70, solving the problem of fixing the elastic abutment part 60 to the motor housing 31. While ensuring transmission accuracy, it also takes into account assembly efficiency and maintenance convenience. For example, the fastener 70 can be a self-locking nut to prevent loosening caused by long-term vibration and ensure connection reliability.

[0047] As one possible implementation method, such as Figure 2 As shown, the connecting tip of the V-shaped abutment 61 abuts against the inner wall of the mounting base 10 on the side away from the motor 30.

[0048] It should be noted that a pointed structure is formed between the free end of the V-shaped abutment portion 61 and the connecting end connected to the L-shaped abutment portion 62. For example, the included angle of the connecting tip is between 60° and 90° to concentrate the abutment force. The inner wall of the mounting base 10 on the side away from the motor 30 can be provided with an abutment surface that matches the tip. The abutment surface can be a plane, an arc surface, or a stepped surface, etc. There are no specific limitations here. Those skilled in the art should be able to make reasonable selections and designs according to the actual situation.

[0049] The connecting tip of the V-shaped abutment 61 is constrained by the inner wall of the mounting base 10, resulting in elastic deformation and generating a thrust pointing towards the helical gear 50. This thrust is transmitted to the mounting bracket 20 through the first folding arm of the L-shaped abutment 62. When the meshing clearance between the worm 40 and the helical gear 50 increases, the mounting bracket 20 rotates towards the helical gear 50 under the action of the thrust, causing the worm 40 to move to compensate for the clearance. When the clearance decreases, the elastic deformation of the V-shaped abutment 61 decreases, and the thrust is automatically adjusted, thereby maintaining the dynamic balance of meshing tightness.

[0050] As one possible implementation method, such as Figures 4 to 8 As shown, the mounting bracket 20 is provided with an elastic abutment 23 at the end away from the motor 30, the worm gear 40 has an abutment surface 41 at the end near the motor 30, and a corresponding support surface 24 is provided on the mounting bracket 20. The elastic abutment 23 is used to drive the mounting bracket 20 to move toward the side near the motor 30 so that the abutment surface 41 abuts against the support surface 24.

[0051] It should be noted that the mounting bracket 20 and the worm gear 40 form an axial positioning and elastic compensation scheme through the combined design of the elastic abutment 23, the abutment surface 41, and the support surface 24. Specifically, the elastic abutment 23 is located at the end of the mounting bracket 20 away from the motor 30. The elastic abutment 23 can be a coil spring, a disc spring, or an elastic rubber block, and its axis is consistent with the axial direction of the worm gear 40. The end face of the worm gear 40 closest to the motor 30 is the abutment surface 41, and the end face of the mounting bracket 20 corresponding to the abutment surface 41 is the support surface 24. The elastic abutment 23 should have a certain pre-compression force to push the mounting bracket 20 towards the side closer to the motor 30, so that the abutment surface 41 of the worm gear 40 is tightly fitted with the support surface 24 of the mounting bracket 20, thereby forming axial positioning. At the same time, this abutment force can counteract the axial component force of the worm gear 40 during transmission (such as the axial force generated by the meshing of the helical gear 50), preventing the worm gear 40 from axially shifting. When the meshing clearance between the worm 40 and the helical gear 50 increases, the elastic deformation of the elastic support part 23 automatically compensates for the assembly clearance, ensuring that the support surface 41 and the support surface 24 are always in contact, thereby maintaining the axial stability of the worm 40.

[0052] As one possible implementation method, such as Figure 7 and Figure 8 As shown, the elastic support part 23 is a bow-shaped spring piece. The mounting base 10 is provided with a limiting protrusion 11 corresponding to the bow-shaped spring piece. The two connecting parts 231 of the bow-shaped spring piece are fixedly connected to the mounting bracket 20. One side of the main body part 232 of the bow-shaped spring piece abuts against the end of the worm gear 40 away from the motor 30, and the other side abuts against the limiting protrusion 11.

[0053] It should be noted that the elastic support part 23 adopts a bow-shaped spring design, which achieves axial support and limiting functions through its unique geometry. Specifically, the bow-shaped spring includes two connecting parts 231 and a main body part 232 connecting the two connecting parts 231. The two connecting parts 231 are symmetrically distributed on both sides of the bow-shaped spring and are used to fix it to the mounting bracket 20. The main body part 232 is used to abut against the worm gear 40. A limiting protrusion 11 is provided on the mounting base 10 at the position corresponding to the main body part 232 of the bow-shaped spring. When the worm gear 40 undergoes axial displacement, the main body part 232 absorbs the displacement through its own elastic deformation, always maintaining abutment against the worm gear 40. At the same time, the limiting protrusion 11 limits the maximum deformation of the bow-shaped spring to prevent excessive deformation of the bow-shaped spring from causing failure.

[0054] As one possible implementation method, such as Figures 3 to 8 As shown, the mounting base 10 has rotating shaft holes 12 on its opposite sides, and the mounting bracket 20 has connecting rotating shafts 25 on its opposite sides corresponding to the rotating shaft holes 12. The two connecting rotating shafts 25 are rotatably mounted in the two rotating shaft holes 12 in a one-to-one correspondence.

[0055] It should be noted that the mounting base 10 and the mounting bracket 20 are rotatably connected through a combination of a rotating shaft hole 12 and a connecting rotating shaft 25. During installation, simply align the connecting rotating shafts 25 on both sides of the mounting bracket 20 with the rotating shaft hole 12 of the mounting base 10 at the designed angle, and slowly push them in until the rotating shafts are fully inserted into the shaft holes to form a rotating pair. When the elastic abutment member 60 pushes the mounting bracket 20, the connecting rotating shaft 25 rotates within the rotating shaft hole 12, causing the mounting bracket 20 to rotate around the rotation center of both, causing the worm gear 40 to move towards the helical gear 50, thereby compensating for the meshing clearance.

[0056] The above description is merely an optional embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

[0057] It should also be noted that the various specific technical features described in the above embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, this application will not describe the various possible combinations separately.

Claims

1. A driving mechanism, characterized in that, The device includes a mounting base, a mounting bracket, a motor, a worm gear, a helical gear, and a resilient abutment. The mounting bracket is rotatably disposed within the mounting base, and the worm gear is rotatably disposed within the mounting bracket. The motor is connected to the worm gear, and the worm gear meshes with the helical gear. The first end of the resilient abutment abuts against the inner wall of the mounting base, and the second end abuts against the outer wall of the mounting bracket. The resilient abutment drives the mounting bracket to move toward the side closer to the helical gear, so that the worm gear and the helical gear are tightly engaged.

2. The driving mechanism according to claim 1, characterized in that, The elastic abutment includes a V-shaped abutment portion and an L-shaped abutment portion connected to the V-shaped abutment portion. The free end of the V-shaped abutment portion abuts against the inner wall of the mounting base. The first folding arm of the L-shaped abutment portion abuts against the outer wall of the mounting bracket. The second folding arm of the L-shaped abutment portion is located between the motor and the worm gear.

3. The driving mechanism according to claim 2, characterized in that, The outer wall of the mounting bracket is provided with a fixing groove extending along the axial direction of the worm gear, and snap fasteners are provided on opposite sides of the fixing groove. The first folding arm is accommodated within the limiting space formed by the fixing groove and the snap fasteners.

4. The driving mechanism according to claim 2, characterized in that, The second folding arm is provided with a limiting countersink and a limiting buckle. The second folding arm contacts the motor housing of the motor. The motor housing is provided with a connecting lug. The limiting buckle engages with the connecting lug. The limiting countersink is provided with a through hole. The output shaft of the motor and the worm gear are housed in the through hole of the limiting countersink.

5. The driving mechanism according to claim 4, characterized in that, The second folding arm is provided with a mounting hole, and the connecting lug is provided with a connecting hole corresponding to the mounting hole. Fasteners are inserted into the connecting hole and the mounting hole to fix the second folding arm to the motor housing.

6. The driving mechanism according to any one of claims 2 to 5, characterized in that, The connecting tip of the V-shaped abutment abuts against the inner wall of the mounting base on the side away from the motor.

7. The driving mechanism according to claim 1, characterized in that, The mounting bracket has an elastic abutment at one end away from the motor, the worm gear has an abutment surface at one end near the motor, and a corresponding support surface is provided on the mounting bracket. The elastic abutment is used to drive the mounting bracket to move toward the side closer to the motor so that the abutment surface abuts against the support surface.

8. The driving mechanism according to claim 7, characterized in that, The elastic support part is a bow-shaped spring piece. The mounting base is provided with a limiting protrusion corresponding to the bow-shaped spring piece. The two connecting parts of the bow-shaped spring piece are fixedly connected to the mounting bracket. One side of the main body of the bow-shaped spring piece abuts against the end of the worm gear away from the motor, and the other side abuts against the limiting protrusion.

9. The driving mechanism according to claim 1, characterized in that, The mounting base has rotating shaft holes on its opposite sides, and the mounting bracket has connecting shafts on its opposite sides corresponding to the rotating shaft holes. The two connecting shafts are rotatably mounted in the two rotating shaft holes in a one-to-one correspondence.

10. A heads-up display, characterized in that, The device includes a housing, a reflector, and a drive mechanism as described in any one of claims 1 to 9. The reflector is provided with a rotating shaft that is rotatably connected to the housing. The reflector is fixedly connected to the helical gear. The motor is used to drive the worm gear to rotate, thereby causing the helical gear to move along the worm gear, so that the reflector rotates around the rotating shaft.

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