A plastic lens rotating device suitable for optical display

Abstract

A plastic lens rotating device suitable for optical display. It includes a lens, a lens base, a rotating fixed bracket, a motor assembly, a turbine, and a ball head shaft end cap; the lens is an optical lens molded by plastic injection, and the lens includes an injection layer for the lens base and a reflective film layer for achieving optical performance; a positioning pin is provided at each end of the long axis of the lens, and a round hole and an oblong hole matching the positioning pin are provided at both ends of the long axis of the lens base, the lens is connected to the lens base to form a lens assembly, and the positioning pins of the lens are respectively embedded in the round hole and the oblong hole of the lens base; the lens base is provided with a left rotating shaft and a right rotating shaft, and the left rotating shaft and the right rotating shaft are arranged on the same axis. The plastic lens rotating device adopts a plastic lens and is provided with a swing rod limiter, and adopts a turbine worm gear transmission, and adopts a ball head shaft end cap to form a damping structure, and is a plastic lens rotating device suitable for optical display.

Description

Technical Field

[0001] The invention relates to an optical display device, in particular to a plastic lens rotating device suitable for optical display, which adopts a plastic lens and is provided with a swing rod limiter, adopts a worm gear transmission, and adopts a ball head shaft end cover to form a damping structure. Background Art

[0002] In order to meet the imaging perspective of drivers of different heights, the head-up display (HUD) on the car needs to have an optical lens with an adjustable reflection angle. In order to reduce weight and reduce manufacturing costs, the plastic injection molding process is used to manufacture large-sized optical lenses, which makes it easier to adjust the angle of the lens.

[0003] The existing lens rotating device has the following shortcomings:

[0004] 1. Most parts are made of hardware, which is heavy, numerous, and takes up a lot of space, resulting in a large overall volume of the HUD, which is not conducive to its placement on the car and is not conducive to the popularization of HUD in the automotive industry;

[0005] 2. For the convenience of installation, the fixed bracket of the existing rotating device is mostly divided into two brackets on the left and right. The coaxiality of the rotating shaft holes on the two brackets is poor, resulting in the problem of unsmooth rotation. In addition, the metal bracket is heavy, which is not conducive to lightweighting.

[0006] 3. The existing rotating device mainly adopts the screw slide transmission mode, which occupies a particularly large volume and has a high manufacturing cost;

[0007] 4. Lack of reasonable rotation limit structure makes it inconvenient to position the lens and affects its service life;

[0008] 5. The damping structure is a spring or metal damper, which is heavy and difficult to install. Summary of the invention

[0009] The purpose of the present invention is to solve the above-mentioned technical problems and provide a plastic lens rotating device suitable for optical display. The rotating device adopts a plastic lens and is provided with a rocker limiter, and adopts a worm gear transmission and a ball head shaft end cover to form a damping structure. The rotating device is a plastic lens rotating device suitable for optical display.

[0010] In order to solve the above-mentioned prior art problems, the technical solution of the present invention is:

[0011] The present invention discloses a plastic lens rotating device suitable for optical display, which comprises a lens, a lens base, a rotating fixed bracket, a motor assembly, a turbine, and a ball head shaft end cover;

[0012] The lens is an optical lens made of plastic injection molding, comprising an injection molding layer for a lens base, and a reflective film layer for achieving optical performance, wherein the reflective film layer is vacuum plated on the surface of the injection molding layer, and the reflective film layer is a free-form surface with high reflectivity and meeting the requirements of optical display. By using plastic, the lens is lightweight;

[0013] A positioning pin is respectively arranged at both ends of the long axis of the lens, and a round hole and an oblong hole matching the positioning pin are arranged at both ends of the long axis of the lens base. The lens is connected to the lens base to form a lens assembly, and the positioning pins of the lens are respectively embedded in the round hole and the oblong hole of the lens base to ensure that the lens and the lens base are assembled correctly;

[0014] The lens base is provided with a left rotating shaft and a right rotating shaft, and the left rotating shaft and the right rotating shaft are arranged on the same axis. The rotating fixed bracket is provided with a left shaft hole and a right shaft hole matching the left rotating shaft and the right rotating shaft, the right rotating shaft is a ball head shaft, and the right shaft hole is a notched shaft hole. A ball head shaft end cap is also provided at the right end of the rotating fixed bracket, and the left rotating shaft and the right rotating shaft of the lens base are respectively embedded in the left shaft hole and the right shaft hole of the rotating fixed bracket, the ball head shaft end cap is fixed to the right side of the rotating fixed bracket and the ball head shaft can be rotatably embedded in the ball head shaft end cap, and the ball head shaft end cap is used to support the right rotating shaft. The rotating fixed bracket is an integrated bracket, so as to ensure better coaxiality of the left rotating shaft and the right rotating shaft.

[0015] The turbine is provided with a positioning circular hole, an oblong hole, two self-tapping screw holes, and a gear portion; the middle position of the rear end surface of the lens base is a turbine connection portion; the turbine connection portion is provided with two positioning pins that match the turbine positioning circular hole and the oblong hole respectively, and the turbine connection portion is provided with two screw holes that match the turbine self-tapping screw holes; the two positioning pins of the turbine connection portion are respectively embedded in the positioning circular hole and the oblong hole of the turbine to achieve the positioning of the turbine; the two self-tapping screw holes of the turbine are respectively provided with a self-tapping screw and are respectively fastened in the screw holes of the turbine connection portion, so that the turbine is connected to the lens base to form a rotating lens assembly;

[0016] The motor assembly includes a worm and a stepper motor. The worm is fixedly connected to the rotating shaft of the stepper motor through a square hole to form a motor assembly. The stepper motor also includes a fixing plate with two screw through holes. The middle position of the rotating fixed bracket is a worm embedding frame. The front side of the worm embedding frame is provided with a worm shaft hole. The rear side of the worm embedding frame is provided with screw holes respectively matching the two screw through holes of the stepper motor. The outer end of the worm is rotatably arranged in the worm shaft hole. The two screw through holes of the stepper motor are respectively provided with self-tapping screws and fastened to the screw holes on the rear side of the worm embedding frame, so that the motor assembly is connected to the rotating fixed bracket, and the worm is meshed with the gear teeth of the turbine.

[0017] A swing arm is also provided on the left side of the lens base, and a limit opening matching the swing arm is provided on the left side of the rotating fixed bracket. When the lens base is connected to the rotating fixed bracket, the swing arm extends into the limit opening, and the height of the limit opening is the rotation travel range of the swing arm.

[0018] The plastic lens rotating device is driven by a motor to drive the worm gear to rotate, and then the gear drives the lens base through the gear, and the lens rotates around the coaxial left rotating shaft, and the rotating lens assembly is rotated within the designed range of angles through the swing rod.

[0019] Further, the plastic lens rotating device also includes a HUD bottom shell, and positioning circular holes and positioning oblong holes for positioning with the HUD bottom shell are further provided on both sides of the rotating fixed bracket, and a plurality of mounting through holes for connecting with the HUD bottom shell are further provided on both sides of the rotating fixed bracket, the HUD bottom shell is provided with two positioning pins matching with the positioning circular holes and the positioning oblong holes, and the HUD bottom shell is further provided with a plurality of screw holes respectively matching with the plurality of mounting through holes, the positioning pins of the HUD bottom shell are embedded in the positioning circular holes and the positioning oblong holes of the rotating fixed bracket to realize the installation and positioning of the rotating fixed bracket, and self-tapping screws are respectively provided in the plurality of mounting through holes of the rotating fixed bracket and are respectively fastened in the plurality of screw holes of the HUD bottom shell, so that the rotating fixed bracket is fixed on the HUD bottom shell;

[0020] The right side of the right connecting plate has a hole, and the left side of the right connecting plate has a hole, and the right side of the right connecting plate has a hole. The left side of the right connecting plate has a hole, and the right side of the right connecting plate has a hole. The hole is fixed to the right side of the right connecting plate, and the right side of the right connecting plate has a hole. The left side of the right connecting plate has a hole, and the right side of the right connecting plate has a hole. The right side of the right connecting plate has a hole, and the right side of the right connecting plate has a hole.

[0021] Furthermore, a mounting surface gap is provided between the ball shaft end cap and the rotating shaft fixing bracket. When the lens rotates, the mounting surface gap is converted into an axial interference between the ball shaft end cap and the ball shaft, and the axial friction between the ball shaft end cap and the ball shaft is used to achieve a damping effect of rotation; the mounting surface gap between the ball shaft end cap and the rotating shaft fixing bracket is 0.5 mm; the ball shaft end cap is injection molded by POM self-lubricating and wear-resistant plastic; further, the ball shaft end cap includes but is not limited to plastic materials;

[0022] Further, the lens is connected to the lens base by gluing, a plurality of gluing points are symmetrically arranged on the back of the lens, a plurality of bonding planes corresponding to the gluing points of the lens are arranged on the lower end surface of the lens base, the plurality of gluing points of the lens are arranged corresponding to the plurality of bonding planes of the lens base, and a gluing gap is reserved, the gluing gap is filled with an adhesive, the gluing gap is 0.3 mm to 0.9 mm, the lens and the lens base are indirectly connected by the adhesive, thereby avoiding a direct rigid connection between the lens and the lens base; a limiting cylinder is respectively arranged at both ends of the short axis of the lens, and limiting planes corresponding to the limiting cylinder are arranged at both ends of the short axis of the lens base, and the limiting cylinders are respectively arranged at positions corresponding to the limiting planes, so as to ensure that the lens and the lens base will not flip during the assembly process;

[0023] Furthermore, the number of glue coating points on the back of the lens is 6, and the number of bonding planes on the lens base is 6; the adhesive gap between the lens and the lens base is 0.5 mm; the adhesive body is soft organic silicone, model Dow 7091, and no primer is required before coating.

[0024] The present invention provides a plastic lens rotating device suitable for optical display, which has the following beneficial effects:

[0025] 1. The motor assembly, lens assembly, and rotation limiter are all designed on the rotating fixed bracket, with a small number of parts, which reduces the assembly time and optimizes the volume of the entire assembly, which is conducive to the layout of the HUD device in the vehicle body;

[0026] 2. The lens assembly rotating support has only one rotating fixed bracket, the coaxiality of the rotation is better controlled, and the lens rotates more smoothly;

[0027] 3. The lens is rotated by worm gear transmission, which is noiseless during the rotation process. A larger transmission ratio can be achieved in a smaller volume. The self-locking property of worm gear transmission greatly improves the stability of HUD under vehicle vibration conditions.

[0028] 4. A swing rod rotation limit structure is provided to facilitate lens positioning and extend the service life of the device;

[0029] 5. An adhesive layer is set between the lens and the lens base, which has good connection stability and will not affect the lens;

[0030] 6. The ball head shaft end cover is used as the damping structure, and the lens has good rotation stability and shock resistance. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 , is a diagram of an assembly of a plastic lens rotating device suitable for optical display according to the present invention;

[0032] Figure 2 , is a disassembled diagram of a plastic lens rotating device suitable for optical display of the present invention;

[0033] Figure 3 , is a top view of the assembly of a turbine, a lens and a lens base of a plastic lens rotating device suitable for optical display of the present invention;

[0034] Figure 4 , is a top view of the assembly of a motor component and a rotating fixed bracket of a plastic lens rotating device suitable for optical display of the present invention;

[0035] Figure 5 , is a top view of a plastic lens rotating device suitable for optical display of the present invention;

[0036] Figure 6 , which is a front view of a plastic lens rotating device suitable for optical display of the present invention;

[0037] Figure 7 ,for Figure 5 BB section diagram in;

[0038] Figure 8 , which is a disassembled diagram of a rotating fixed bracket, a lens base and a lens of a plastic lens rotating device suitable for optical display of the present invention;

[0039] Fig. 9 , which is a partial view of the right side of a rotating fixing bracket of a plastic lens rotating device suitable for optical display of the present invention;

[0040] Fig.10 , which is a right side view of a ball head shaft end cap of a plastic lens rotating device suitable for optical display of the present invention;

[0041] Fig.11 , which is a front view of a plastic lens rotating device suitable for optical display of the present invention after the lens and the lens base are assembled;

[0042] Fig.12 , is a top view of a lens and a lens base of a plastic lens rotating device suitable for optical display of the present invention after being assembled;

[0043] Fig.13 , is a disassembled diagram of a lens and a lens base of a plastic lens rotating device suitable for optical display of the present invention;

[0044] Fig.14 ,for Fig.12 AA section view;

[0045] Fig.15 , which is a distribution diagram of the bonding plane between the glue coating points of the lens and the lens base of a plastic lens rotating device suitable for optical display of the present invention. DETAILED DESCRIPTION

[0046] The present invention will be further described below in conjunction with embodiments:

[0047] Example:

[0048] like Figure 1 to Figure 15 The present invention discloses a plastic lens rotating device suitable for optical display, which comprises a lens 1, a lens base 2, a rotating fixed bracket 3, a motor assembly 4, a turbine 5, and a ball head shaft end cover 32;

[0049] The lens 1 is an optical lens made of plastic injection molding, and comprises an injection molding layer for a lens base, and a reflective film layer for achieving optical performance, wherein the reflective film layer is vacuum plated on the surface of the injection molding layer, and the reflective film layer is a free-form surface with high reflectivity and meets the requirements of optical display. By using plastic, the lens is lightweight;

[0050] A positioning pin 11 is provided at each end of the long axis of the lens 1, and a round hole 21 and an oblong hole 21-1 matching the positioning pin are provided at each end of the long axis of the lens base 2. The lens and the lens base are connected to form a lens assembly, and the positioning pins of the lens are respectively embedded in the round hole and the oblong hole of the lens base to ensure that the lens and the lens base are assembled correctly;

[0051] The lens base 2 is provided with a left rotating shaft 23 and a right rotating shaft 23-1, and the left rotating shaft and the right rotating shaft are arranged on the same axis. The rotating fixed bracket 3 is provided with a left shaft hole 31 and a right shaft hole 31-1 matching the left rotating shaft and the right rotating shaft. The right rotating shaft is a ball head shaft, and the right shaft hole 31-1 is a notched shaft hole. A ball head shaft end cover 32 is also provided at the right end of the rotating fixed bracket. The left rotating shaft and the right rotating shaft of the lens base are respectively embedded in the left shaft hole and the right shaft hole of the rotating fixed bracket. The ball head shaft end cover is fixed to the right side of the rotating fixed bracket and the ball head shaft can be rotatably embedded in the ball head shaft end cover. The ball head shaft end cover is also used to support the right rotating shaft. The rotating fixed bracket is an integrated bracket, so as to ensure better coaxiality of the left rotating shaft and the right rotating shaft.

[0052] The turbine 5 is provided with a positioning circular hole 51, an oblong hole 51-1, two self-tapping screw through holes 51-2, and a gear portion 51-3. The middle position of the rear end surface of the lens base 2 is a turbine connection portion. The turbine connection portion is provided with two positioning pins 24 and 24-1 that match the turbine positioning circular hole and the oblong hole respectively, and the turbine connection portion is provided with two screw holes 25 that match the turbine self-tapping screw through holes. The two positioning pins of the turbine connection portion are respectively embedded in the positioning circular hole and the oblong hole of the turbine to achieve the positioning of the turbine. The two self-tapping screw through holes of the turbine are respectively provided with a self-tapping screw and are respectively fastened in the screw holes of the turbine connection portion, so that the turbine is connected to the lens base to form a rotating lens assembly;

[0053] The motor assembly 4 includes a worm 41 and a stepper motor 42. The worm is fixedly connected to the rotating shaft of the stepper motor through a square hole to form a motor assembly. The stepper motor also includes a fixing plate with two screw through holes 421. The middle position of the rotating fixed bracket 3 is a worm embedding frame. The front side of the worm embedding frame is provided with a worm shaft hole 33. The rear side of the worm embedding frame is provided with screw holes 34 respectively matching the two screw through holes of the stepper motor. The outer end of the worm is rotatably arranged in the worm shaft hole. The two screw through holes of the stepper motor are respectively provided with self-tapping screws and fastened to the screw holes on the rear side of the worm embedding frame, so that the motor assembly is connected to the rotating fixed bracket, and the worm is meshed with the gear teeth of the turbine.

[0054] A swing arm 26 is also provided on the left side of the lens base 2, and a limit opening 35 matching the swing arm is provided on the left side of the rotating fixed bracket 3. When the lens base is connected to the rotating fixed bracket, the swing arm extends into the limit opening, and the height of the limit opening is the rotation range of the swing arm.

[0055] The plastic lens rotating device is driven by a motor to drive the worm gear to rotate, and then the gear drives the lens base through the gear, and the lens rotates around the coaxial left rotating shaft, and the rotating lens assembly is rotated within the designed range of angles through the swing rod.

[0056] Further, the plastic lens rotating device also includes a HUD bottom shell, and the rotating fixed bracket 3 is also provided with a positioning circular hole 36 and a positioning oblong hole 36-1 on both sides for positioning with the HUD bottom shell, and the rotating fixed bracket is also provided with a plurality of mounting through holes 37 on both sides for connecting with the HUD bottom shell, the HUD bottom shell is provided with two positioning pins matching the positioning circular hole and the positioning oblong hole, and the HUD bottom shell is also provided with a plurality of screw holes respectively matching the plurality of mounting through holes, the positioning pins of the HUD bottom shell are embedded in the positioning circular hole and the positioning oblong hole of the rotating fixed bracket to realize the installation and positioning of the rotating fixed bracket, and self-tapping screws are respectively provided in the plurality of mounting through holes of the rotating fixed bracket and are respectively fastened in the plurality of screw holes of the HUD bottom shell, so that the rotating fixed bracket is fixed on the HUD bottom shell;

[0057] Further, the rotating fixed bracket 3 includes a right connecting plate, the right shaft hole of the rotating fixed bracket is set in the middle position of the right connecting plate, the right connecting plate is also provided with a positioning circular hole 37 and an oblong hole 37-1, the ball head shaft end cover 32 is provided with two positioning pins 321 that match the positioning circular hole and the oblong hole respectively, and the two positioning pins of the ball head shaft end cover are respectively embedded in the positioning circular hole and the oblong hole of the right connecting plate, for positioning the ball head shaft end cover and the rotating fixed bracket; the lower side of the ball head shaft end cover 32 is formed with A spherical groove 322 having an inner diameter consistent with the outer diameter of the ball shaft, a screw hole 38 is formed on the left and right sides of the right shaft hole of the right connecting plate of the rotating fixed bracket, and two through holes 323 matching the screw holes on the left and right sides of the right connecting plate are provided on the ball shaft end cover, and bolts are provided through the two through holes of the ball shaft end cover to be fastened to the screw holes on the left and right sides of the right connecting plate, so as to fix the ball shaft end cover to the right connecting plate of the rotating fixed bracket, and the right end of the ball shaft is embedded in the spherical groove of the ball shaft end cover;

[0058] Furthermore, a mounting surface gap is provided between the ball shaft end cap and the rotating shaft fixing bracket. When the lens rotates, the mounting surface gap is converted into an axial interference between the ball shaft end cap and the ball shaft, and the axial friction between the ball shaft end cap and the ball shaft is used to achieve a damping effect of rotation; the mounting surface gap between the ball shaft end cap and the rotating shaft fixing bracket is 0.5 mm; the ball shaft end cap is injection molded by POM self-lubricating and wear-resistant plastic; further, the ball shaft end cap includes but is not limited to plastic materials;

[0059] Further, the lens 1 is connected to the lens base 2 by gluing, a plurality of gluing points A1-A9 are symmetrically arranged on the back of the lens 1, a plurality of bonding planes B1-B9 corresponding to the gluing points of the lens are arranged on the lower end surface of the lens base 2, the plurality of gluing points of the lens are arranged corresponding to the plurality of bonding planes of the lens base respectively, and a gluing gap is reserved, the gluing gap is filled with an adhesive, the gluing gap is 0.3mm-0.9mm, the lens and the lens base are indirectly connected by the adhesive, thereby avoiding a direct rigid connection between the lens and the lens base; a limiting cylinder 13 is respectively arranged at both ends of the short axis of the lens, and limiting planes corresponding to the limiting cylinder are arranged at both ends of the short axis of the lens base, and the limiting cylinders are respectively arranged at positions corresponding to the limiting planes, so as to ensure that the lens and the lens base will not flip during the assembly process;

[0060] Furthermore, the number of glue coating points on the back of the lens is 9, and the number of bonding planes on the lens base is 9; the adhesive gap between the lens and the lens base is 0.5 mm; the adhesive body is soft organic silicone, model Dow 7091, and no primer is required before coating.

[0061] The present invention has been described in detail above. The above description is only a preferred embodiment of the present invention and should not limit the scope of implementation of the present invention. That is, all equivalent changes and modifications made within the scope of this application should still fall within the scope of the present invention.

Claims

1. A plastic lens rotating device suitable for optical display, characterized in that: It includes a lens, a lens base, a rotating fixed bracket, a motor assembly, a worm gear, and a ball head shaft end cover; The lens is an optical lens made of plastic injection molding, comprising an injection molding layer for a lens base, and a reflective film layer for achieving optical performance, wherein the reflective film layer is vacuum plated on the surface of the injection molding layer, and the reflective film layer is a free-form surface with high reflectivity and meeting the requirements of optical display. By using plastic, the lens is lightweight; A positioning pin is respectively arranged at both ends of the long axis of the lens, and a round hole and an oblong hole matching the positioning pin are arranged at both ends of the long axis of the lens base. The lens is connected to the lens base to form a lens assembly, and the positioning pins of the lens are respectively embedded in the round hole and the oblong hole of the lens base to ensure that the lens and the lens base are assembled correctly; The lens base is provided with a left rotating shaft and a right rotating shaft, and the left rotating shaft and the right rotating shaft are arranged on the same axis. The rotating fixed bracket is provided with a left shaft hole and a right shaft hole matching the left rotating shaft and the right rotating shaft, the right rotating shaft is a ball head shaft, and the right shaft hole is a notched shaft hole. A ball head shaft end cap is also provided at the right end of the rotating fixed bracket, and the left rotating shaft and the right rotating shaft of the lens base are respectively embedded in the left shaft hole and the right shaft hole of the rotating fixed bracket, the ball head shaft end cap is fixed to the right side of the rotating fixed bracket and the ball head shaft can be rotatably embedded in the ball head shaft end cap, and the ball head shaft end cap is used to support the right rotating shaft. The rotating fixed bracket is an integrated bracket, so as to ensure better coaxiality of the left rotating shaft and the right rotating shaft. The worm wheel is provided with a positioning circular hole, an oblong hole, two self-tapping screw through holes, and a gear portion; the middle position of the rear end surface of the lens base is a worm wheel connecting portion; the worm wheel connecting portion is provided with two positioning pins that match the worm wheel positioning circular hole and the oblong hole respectively, and the worm wheel connecting portion is provided with two screw holes that match the worm wheel self-tapping screw through holes; the two positioning pins of the worm wheel connecting portion are respectively embedded in the positioning circular hole and the oblong hole of the worm wheel to achieve the positioning of the worm wheel; the two self-tapping screw through holes of the worm wheel are respectively provided with a self-tapping screw and are respectively fastened in the screw hole of the worm wheel connecting portion, so that the worm wheel is connected to the lens base to form a rotating lens assembly; The motor assembly includes a worm and a stepper motor. The worm is fixedly connected to the rotating shaft of the stepper motor through a square hole to form a motor assembly. The stepper motor also includes a fixing plate with two screw through holes. The middle position of the rotating fixed bracket is a worm embedding frame. The front side of the worm embedding frame is provided with a worm shaft hole. The rear side of the worm embedding frame is provided with screw holes respectively matching the two screw through holes of the stepper motor. The outer end of the worm is rotatably arranged in the worm shaft hole. The two screw through holes of the stepper motor are respectively provided with self-tapping screws and fastened to the screw holes on the rear side of the worm embedding frame, so that the motor assembly is connected to the rotating fixed bracket, and the worm is meshed with the gear teeth of the worm wheel. A swing arm is also provided on the left side of the lens base, and a limit opening matching the swing arm is provided on the left side of the rotating fixed bracket. When the lens base is connected to the rotating fixed bracket, the swing arm extends into the limit opening, and the height of the limit opening is the rotation range of the swing arm; The plastic lens rotating device also includes a HUD bottom shell, and positioning circular holes and positioning oblong holes for positioning with the HUD bottom shell are further provided on both sides of the rotating fixed bracket, and a plurality of mounting through holes for connecting with the HUD bottom shell are further provided on both sides of the rotating fixed bracket, and the HUD bottom shell is provided with two positioning pins matching the positioning circular holes and the positioning oblong holes, and the HUD bottom shell is further provided with a plurality of screw holes respectively matching the plurality of mounting through holes, and the positioning pins of the HUD bottom shell are embedded in the positioning circular holes and the positioning oblong holes of the rotating fixed bracket to realize the installation and positioning of the rotating fixed bracket, and self-tapping screws are respectively provided in the plurality of mounting through holes of the rotating fixed bracket and are respectively fastened in the plurality of screw holes of the HUD bottom shell, so that the rotating fixed bracket is fixed on the HUD bottom shell; The right side of the right connecting plate is provided with a screw hole, and the screw hole on the right side of the right connecting plate is provided with a screw hole, and the screw hole on the left side of the right connecting plate is provided with a screw hole, and the screw hole on the left side of the right connecting plate is provided with a screw hole, so that the screw hole on the right side of the right connecting plate is fixed to the right connecting plate of the rotating fixing bracket, and the right end of the ball head shaft is embedded in the spherical groove of the ball head shaft end cover. A mounting surface gap is set between the ball head shaft end cover and the rotating fixed bracket. When the lens rotates, the mounting surface gap is converted into an axial interference between the ball head shaft end cover and the ball head shaft, and the damping effect of rotation is achieved through the axial friction between the ball head shaft end cover and the ball head shaft; the mounting surface gap between the ball head shaft end cover and the rotating fixed bracket is 0.5mm; the ball head shaft end cover is injection molded with POM self-lubricating and wear-resistant plastic; further, the ball head shaft end cover includes but is not limited to plastic material.

2. A plastic lens rotating device suitable for optical display according to claim 1, characterized in that: The lens is connected to the lens base by gluing, a plurality of gluing points are symmetrically arranged on the back of the lens, a plurality of bonding planes corresponding to the gluing points of the lens are arranged on the lower end surface of the lens base, the plurality of gluing points of the lens are arranged corresponding to the plurality of bonding planes of the lens base, and a gluing gap is reserved, the gluing gap is filled with an adhesive, the gluing gap is 0.3 mm to 0.9 mm, the lens and the lens base are indirectly connected by the adhesive, thereby avoiding a direct rigid connection between the lens and the lens base; a limiting cylinder is respectively arranged at both ends of the short axis of the lens, and limiting planes corresponding to the limiting cylinder are arranged at both ends of the short axis of the lens base, and the limiting cylinders are respectively arranged at positions corresponding to the limiting planes, so as to ensure that the lens and the lens base will not flip during the assembly process.

3. A plastic lens rotating device suitable for optical display according to claim 2, characterized in that: The number of glue coating points on the back of the lens is 6, and the number of bonding planes on the lens base is 6; the adhesive gap between the lens and the lens base is 0.5 mm; the adhesive body is soft organic silicone, model Dow 7091, and no primer is required before coating.

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