A dynamic adjustment mechanism and a vehicle-mounted holographic interaction device thereof

Abstract

This invention discloses a dynamic adjustment mechanism and its in-vehicle holographic interactive device, comprising: a base, a rotation component, and a pitch component; an optical module including a semi-circular cover plate; the semi-circular cover plate having a holographic image component for displaying holographic images; the pitch component including: a pitch motor, a pitch bracket, and a pitch linkage unit; the pitch linkage unit including: a first link, a second link, a third link, and a fourth link; the first link, the second link, the third link, and the semi-circular cover plate together constitute a first parallelogram linkage structure; the first link, the third link, the fourth link, and the pitch bracket together constitute a second parallelogram linkage structure. This invention achieves high response speed and precise positioning capability by adjusting the semi-circular cover plate with two degrees of freedom, allowing holographic images to be accurately aligned with passengers in any position within the vehicle; it provides a reliable physical execution layer for interactive commands such as voice and gestures, realizing an immersive "what you point to is what you get" experience.

Description

Technical Field

[0001] This invention relates to in-vehicle holographic interactive devices, and more particularly to a dynamic adjustment mechanism, and an in-vehicle holographic interactive device including such a dynamic adjustment mechanism. Background Technology

[0002] As automotive intelligence expands from the driving realm to the cabin experience, the way in-vehicle information is presented is undergoing a revolutionary transformation from two-dimensional to three-dimensional. Holographic interactive technology, with its ability to present three-dimensional images suspended in the air, is regarded as the core interactive interface of the next-generation smart cockpit, offering an unprecedented sense of immersion and technology. However, its immersive experience faces severe engineering challenges.

[0003] First, the passenger's seating position and movement will change the passenger's viewing angle, affecting the information displayed in the holographic image. Second, the three-dimensionality of the holographic image is extremely sensitive to the viewing angle, and the vibration of the vehicle during movement will continuously disrupt this viewing angle. Finally, the space available for installing holographic interactive devices in the car cabin is very limited and irregular, making it impossible to install large-sized holographic interactive devices.

[0004] To ensure passengers can view holographic images regardless of their seating position or vehicle movement, the holographic interactive device needs to be able to drive the optical module to rotate or pitch rapidly and accurately based on voice, gestures, or vehicle status. This requires the entire device to be motion-independent, meaning the entire pitch adjustment mechanism (including motors, transmission components, and linkages) must be housed and arranged on the rotating component. Furthermore, traditional precision motion mechanisms are difficult to integrate with irregularly shaped optical modules. This means that the height space occupied by the rotating component, pitch component, and optical module in existing holographic interactive devices can only be directly stacked, resulting in a large device height that cannot be installed within limited space. This directly renders traditional stacked or separate design solutions completely ineffective, posing an unprecedented integration challenge for in-vehicle holographic interactive devices. Summary of the Invention

[0005] To overcome the shortcomings of the prior art, one objective of the present invention is to provide a dynamic adjustment mechanism, and another objective is to provide an in-vehicle holographic interactive device including such a dynamic adjustment mechanism, so as to solve the problems of poor pitch and rotation accuracy, unstable holographic display effect, and large height space occupied by the device in the existing in-vehicle holographic interactive devices.

[0006] A dynamic adjustment mechanism includes: a base, a rotation component, and a pitch component; the base, rotation component, pitch component, and optical module are sequentially connected; the rotation component includes a rotation drive motor and a rotating body; the rotating body is rotatably mounted on the base; the rotation drive motor drives the rotating body to rotate; the optical module includes a semi-circular cover plate; the semi-circular cover plate is provided with a holographic image component for displaying holographic images; the pitch component includes: a pitch motor, a pitch support, and a pitch linkage unit; the pitch linkage unit includes: a first linkage, The second, third, and fourth links; the first, second, and third links and the large semicircular cover plate together constitute the first parallelogram link structure; the first, third, and fourth links and the pitch support together constitute the second parallelogram link structure; the pitch motor is used to drive the first or fourth link to swing, so that the pitch link unit drives the large semicircular cover plate to swing around the virtual rotation center; the virtual rotation center is located at the upper surface edge of the large semicircular cover plate; the swing direction of the large semicircular cover plate intersects with the rotation direction of the rotating body.

[0007] Preferably, the pitch assembly further includes a second pinion and a sector gear; the sector gear is fixedly connected to the fourth connecting rod, and the second pinion is fixedly connected to the output shaft of the pitch motor; the second pinion meshes with the sector gear and drives each other.

[0008] Preferably, the rotary drive motor is arranged laterally, fixedly mounted on the rotating body, and offset from the rotation axis of the rotating body.

[0009] Preferably, the rotating assembly further includes a first pinion and a large gear; the first pinion is fixedly connected to the output shaft of the rotating drive motor; the large gear is rotatably connected to the rotating body and fixedly connected to the base; the first pinion and the large gear mesh and drive each other.

[0010] Preferably, the rotating assembly further includes a deep groove ball bearing and a flat-head screw. A thin-walled cylindrical boss is integrally formed on the bottom of the rotating body, and the boss is interference-fitted with the inner ring of the deep groove ball bearing. A bearing chamber is provided at the lower part of the large gear to accommodate the deep groove ball bearing. Several screw holes are opened on the large gear and are evenly distributed around the bearing chamber. Flat-head screws are screwed into the screw holes, and the screw caps of the flat-head screws press against the upper side of the outer ring of the deep groove ball bearing. The lower side of the outer ring of the deep groove ball bearing contacts the base.

[0011] Preferably, the rotating body has a waist-shaped hole corresponding to the screw hole.

[0012] Preferably, a cover is provided on the base, the cover has a ring structure, the optical module is located inside the cover, and the upper side of the cover is flush with the upper side of the optical module.

[0013] Preferably, there are two pitch linkage units, both of which are connected to the semicircular cover plate. The two symmetrically arranged pitch linkage units are located on both sides of the semicircular cover plate.

[0014] A vehicle-mounted holographic interactive device includes the aforementioned dynamic adjustment mechanism and an optical module fixedly mounted on the dynamic adjustment mechanism.

[0015] Beneficial effects: (1) Theoretically, the optimal pitch swing center of the holographic display component should be located at the edge of the upper surface of the holographic display component; however, it is physically impossible to arrange a real rotation axis at this position. To this end, this vehicle-mounted holographic interactive device abandons the traditional single-axis hinge and creatively proposes a design scheme of "fitting the virtual rotation center through multi-link composite motion". Specifically, by using the above-mentioned pitch linkage unit, the composite motion of the two-stage series parallelogram linkage structure is achieved, and the instantaneous rotation center of the semicircular cover plate during the flipping process is fitted to the virtual rotation center, so that the semicircular cover plate can be pitched and swung around the virtual rotation center.

[0016] (2) By cooperating with the rotation component and the pitch component, the semi-circular cover plate is adjusted with two degrees of freedom, so that the display surface of the semi-circular cover plate can be accurately facing the operators in different directions, so that the operators can operate at the best angle, achieving high response speed and accurate positioning capability, and enabling the holographic image to be accurately aimed at passengers in any position in the vehicle; it provides a reliable physical execution layer for interactive commands such as voice and gestures, and realizes the immersive experience of "what you point to is what you get".

[0017] (3) When holographic display is required at different elevation angles, the angle of pitch swing of the semicircular cover plate is linearly mapped to the angle of rotation of the second pinion driven by the pitch motor, thus achieving accurate reproduction of the motion state. This allows the electronic control module to directly convert the target pitch angle into the rotation command of the pitch motor without complex nonlinear calculations or real-time trajectory compensation algorithms, realizing direct mapping of "command-position". This enables more precise control of the pitch swing of the semicircular cover plate, thereby more accurately adjusting the holographic display at different elevation angles. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0019] Figure 2 This is a schematic diagram of the split three-dimensional structure of the present invention.

[0020] Figure 3 This is a schematic diagram of the disassembled three-dimensional structure of the rotating component of the present invention.

[0021] Figure 4 This is a partial three-dimensional structural diagram of the pitch support and pitch linkage unit of the present invention.

[0022] Figure 5 This is a partial three-dimensional structural diagram of the pitch component of the present invention.

[0023] Figure 6 This is a partial structural schematic diagram of the pitch component of the present invention.

[0024] Figure 7 This is a schematic diagram of the pitch linkage unit of the present invention.

[0025] Figure 8 This is a three-dimensional structural diagram of the optical module of the present invention.

[0026] Figure 9 This is a three-dimensional structural diagram of the pitch motor and the second pinion of the present invention.

[0027] Specific reference numerals in the attached drawings: 100, base; 200, rotating assembly; 210, rotating drive motor; 211, first pinion; 212, plastic bracket; 220, rotating body body; 221, oblong hole; 222, boss; 223, rotating body stop; 230, large gear; 231, tooth; 232, bearing housing; 233, screw hole; 240, deep groove ball bearing; 250, flat head screw; 251. Screws and nuts; 300, Pitch assembly; 310, Pitch motor; 311, Second pinion; 312, Sector gear; 320, Pitch support; 330, Pitch linkage unit; 331, First link; 332, Second link; 333, Third link; 334, Fourth link; 400, Optical module; 410, Large semi-circular cover plate; 420, Fixed cover plate; O1, Virtual rotation center; 500, Housing. Detailed Implementation

[0028] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0029] In the description of this invention, it should be understood that the terms "center", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and 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 invention.

[0030] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0031] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0032] A dynamic adjustment mechanism, such as Figures 1-8 As shown, it includes: a base 100, a rotation component 200, and a pitch component 300; the base 100, rotation component 200, pitch component 300, and optical module 400 are connected in sequence; the rotation component 200 includes a rotation drive motor 210 and a rotating body 220; the rotating body 220 is rotatably mounted on the base 100; the rotation drive motor 210 is used to drive the rotating body 220 to rotate; the optical module 400 includes a semi-circular cover plate 410 and a fixed cover plate 420, and the optical module... The upper surface of assembly 400 is formed by splicing a large semi-circular cover plate 410 and a fixed cover plate 420; the large semi-circular cover plate 410 is provided with a holographic image component for displaying holographic images, and the holographic images generated by the holographic image component can be displayed through the large semi-circular cover plate 410; a straight gap is left between the fixed cover plate 420 and the large semi-circular cover plate 410; the upper surface of the large semi-circular cover plate 410 is provided with a straight edge; the fixed cover plate 420 is fixedly connected to the pitch bracket 320. This dynamic adjustment mechanism is used for in-vehicle holographic interactive devices.

[0033] The pitch assembly 300 includes: a pitch motor 310, a pitch support 320, and a pitch linkage unit 330; the pitch linkage unit 330 includes: a first link 331, a second link 332, a third link 333, and a fourth link 334; the first link 331, the second link 332, the third link 333, and the large semi-circular cover plate 410 together constitute a first parallelogram linkage structure; the first link 331, the third link 333, the fourth link 334, and the pitch support 320 together constitute a second parallelogram linkage structure; the first parallelogram... The parallelogram linkage structure and the second parallelogram linkage structure are combined to form a two-stage series parallelogram linkage structure; the first linkage 331, the second linkage 332, the third linkage 333 and the fourth linkage 334 are all perpendicular to the straight edge of the large semicircular cover plate 410; the pitch motor 310 is used to drive the first linkage 331 or the fourth linkage 334 to swing, so that the pitch linkage unit 330 drives the large semicircular cover plate 410 to swing around the virtual rotation center O1; the virtual rotation center O1 is located on the straight edge of the upper surface of the large semicircular cover plate 410. The swing direction of the semicircular cover plate 410 intersects with the rotation direction of the rotating body 220. The semicircular cover plate 410 swings in the vertical direction, while the rotating body 220 rotates in the horizontal direction.

[0034] Specifically, a first link 331 and a fourth link 334 are rotatably connected to the pitch support 320; a second link 332 and a third link 333 are rotatably connected to the optical module 400; the end of the first link 331 away from the pitch support 320 is rotatably connected to the end of the second link 332 away from the optical module 400; the middle part of the first link 331 is rotatably connected to the middle part of the third link 333; the end of the third link 333 away from the optical module 400 is rotatably connected to the end of the fourth link 334 away from the pitch support 320.

[0035] All hinge points of the pitch linkage unit 330 are arranged in the same plane perpendicular to the virtual rotation center O1. Through a clever folding design, the overall space occupied by the pitch linkage unit 330 is minimized when the pitch is at zero position (i.e., when the semicircular cover plate 410 is flush with the fixed cover plate 420), thus saving installation space. The projection of the entire pitch assembly 300 is completely within the contour of the upper surface of the rotating body 220, making the equipment layout more compact and preventing interference between the pitch assembly 300 and other parts of the equipment. Standard stepped screws are used as hinge axes between the pitch support 320 and the first link 331, and between the pitch support 320 and the fourth link 334. The smooth part of the stepped screw is precisely matched with the deep groove ball bearing to ensure rotational accuracy, and the threaded part of the stepped screw is axially fixed by a nut, realizing a low-cost, high-precision, and easy-to-assemble hinge solution. All rotating pairs in the pitch assembly 300 use standard deep groove ball bearings, with the bearing housings designed on the corresponding connecting rods, ensuring coaxiality through a single clamping and machining process.

[0036] In some existing in-vehicle holographic interactive devices, the holographic display components can be retracted or extended from the device housing. Most of these devices are connected to the holographic display components via a single-axis hinge, allowing the holographic display components to tilt and swing around the hinge. Tilting upwards extends the holographic display components, while tilting downwards retracts them. In actual assembly, because the holographic display components typically have a certain thickness, and the gap between the holographic display components and the protective housing needs to be kept small, the theoretically optimal tilt and swing center of the holographic display components should be located at the edge of the upper surface of the holographic display components.

[0037] However, it is physically impossible to arrange a real rotation axis at this location. Therefore, this in-vehicle holographic interactive device abandons the traditional single-axis hinge and creatively proposes a design scheme of "fitting a virtual rotation center through multi-link composite motion". Specifically, by using the aforementioned pitch linkage unit 330, a composite motion of two-stage series parallelogram linkage structures is achieved to fit the instantaneous rotation center of the semi-circular cover plate 410 during its flipping process to a virtual rotation center O1, and to position the virtual rotation center O1 at the edge of the upper surface of the semi-circular cover plate 410, allowing the semi-circular cover plate 410 to pitch and swing around the virtual rotation center O1.

[0038] When holographic displays require different elevation angles, the pitch motor 310 drives the pitch linkage unit 330 to tilt, which in turn causes the semicircular cover plate 410 to tilt around the virtual rotation center O1. When holographic displays require different horizontal angles, the rotation drive motor 210 drives the rotating body 220 to rotate horizontally, which in turn causes the semicircular cover plate 410 to rotate horizontally. Through the cooperation of the rotation component 200 and the pitch component 300, the semicircular cover plate 410 can be adjusted with two degrees of freedom, allowing the display surface of the semicircular cover plate 410 to accurately face operators in different directions. This enables operators to operate from the optimal angle, achieving high response speed and precise positioning capabilities. The holographic image can be accurately aimed at passengers in any position inside the vehicle. This provides a reliable physical execution layer for interactive commands such as voice and gestures, realizing an immersive "what you point to is what you get" experience.

[0039] Since the first link 331 and the third link 333 serve as common links constituting the first parallelogram link structure and the second parallelogram link structure; and in both the first and second parallelogram link structures, the three hinge points on the first link 331 are on the same straight line; the three hinge points on the third link 333 are also on the same straight line. This ensures that the first link 331, the fourth link 334, and the large semicircular cover plate 410 remain parallel at all times. The virtual rotation center O1 is located at the intersection of the straight line containing the two hinge points of the large semicircular cover plate 410 and the straight line containing the two hinge points of the pitch support 320.

[0040] Specifically, when holographic displays are required at different elevation angles, the pitch motor 310 drives either the first link 331 or the fourth link 334 in the pitch linkage unit 330 to perform pitch swinging. Based on the transmission characteristics of the parallelogram linkage structure, the semicircular cover plate 410 can swing around a virtual axis fixed relative to the rotating body 220. This virtual axis serves as the virtual rotation center O1 for the pitch swinging of the semicircular cover plate 410. The pitch swing angles of the first link 331, the fourth link 334, and the semicircular cover plate 410 are equal, facilitating accurate control of the pitch swing angle of the semicircular cover plate 410. This allows the semicircular cover plate 410 to swing around the virtual rotation center O1, improving stability. Furthermore, by accurately controlling the pitch swing angle of the first link 331, the pitch swing angle of the semicircular cover plate 410 can be accurately controlled, improving the accuracy of pitch adjustment. This results in stable and accurate holographic displays at different elevation angles.

[0041] For ease of understanding, such as Figure 7As shown, L5~L8 form the first parallelogram linkage structure, and L1~L4 form the second parallelogram linkage structure; L4 and L5 are two segments fixed in the first linkage 331, and L3 and L7 are two segments fixed in the third linkage 333; when the pitch adjustment of the semicircular cover plate 410 is required, the pitch motor 310 drives the sector gear 312 to rotate around point A, which drives the second parallelogram linkage structure to move, and drives the first parallelogram linkage structure through the first linkage 331 and the third linkage 333, ultimately driving the semicircular cover plate 410 to pitch smoothly around the virtual center O1.

[0042] Specifically, such as Figure 2 and Figure 8 As shown, when the large semicircular cover plate 410 is not swinging upward, the fixed cover plate 420 and the upper surface of the large semicircular cover plate 410 are joined to form a horizontal circular plane; the back of the large semicircular cover plate 410 protrudes downward, so that the interior of the large semicircular cover plate 410 has sufficient space for installing related holographic imaging components. Users can view the holographic display content through the display surface of the large semicircular cover plate 410; the protruding part on the back of the large semicircular cover plate 410 adopts a specific shape to avoid interference between the large semicircular cover plate 410 and other components of this vehicle-mounted holographic interactive device when the large semicircular cover plate 410 is tilted.

[0043] More preferably, such as Figure 5 , Figure 6 and Figure 9 As shown, the pitch assembly 300 also includes a second pinion 311 and a sector gear 312; the sector gear 312 is fixedly connected to the fourth link 334, and the center of the sector gear 312 is fixedly connected to the fourth link 334 using a non-circular fit such as a flat or D-shaped shaft. The sector gear 312 and the fourth link 334 are interference-fitted, eliminating connection clearance and improving motion transmission rigidity. The hinge point of the fourth link 334 and the pitch support 320 coincides with the axis of the sector gear 312; the second pinion 311 is fixedly connected to the output shaft of the pitch motor 310; the second pinion 311 meshes with the sector gear 312 and drives the transmission; the pitch motor 310 uses a miniature worm gear self-locking motor as the drive source. And through the synergy of self-locking motor and linear control, the following effects are produced: (1) Self-locking requirement matching: The self-locking characteristics of the worm gear self-locking motor are combined with the deterministic motion of the linkage structure to achieve the unity of static absolute locking and dynamic precise tracking. In this way, the semi-circular cover plate 410 is smoothly supported and precisely pitched, which not only ensures the stability and clarity of the holographic image during driving, but also improves the accuracy of the pitch angle adjustment of the holographic image; (2) Simplified control interface: Due to the linear determinism of the motion relationship, the controller of the pitch motor 310 only needs to implement position loop control, without the need for complex algorithms such as speed feedforward or acceleration compensation, which reduces the cost and complexity of the control system.

[0044] When holographic display is required at different elevation angles, the pitch motor 310 drives the second pinion 311 to rotate, which in turn drives the sector gear 312 to rotate, which in turn drives the fourth link 334 to rotate. When the fourth link 334 rotates, the second link 332 and the third link 333 drive the semicircular cover plate 410 to pitch and swing. The pitch and swing angles of the first link 331, the fourth link 334, and the semicircular cover plate 410 are equal. The sector gear 312 not only serves as a speed reduction transmission component, enabling the angular velocities of the second pinion 311 and the sector gear 312 to be reduced in a fixed ratio, but also serves as the fixed hinge point A of the second parallelogram structure. The hinge point between the fourth link 334 and the pitch support 320 integrates the functions of transmission and structural support. As a result, the pitch angle of the semicircular cover plate 410 and the rotation angle of the second pinion 311 driven by the pitch motor 310 are linearly mapped. Specifically, the rotation angle (θ1) of the fourth link 334 and the pitch angle (θ8) of the semicircular cover plate 410 around the virtual rotation center O1 are kept in a strict 1:1 linear correspondence, i.e., θ8=k•θ1 (where k=1). Furthermore, the angular velocity (ω1) of the fourth link 334 and the pitch angular velocity (ω8) of the semicircular cover plate 410 around the virtual rotation center O1 are also kept linearly synchronized, thus achieving accurate reproduction of the motion state. This allows the electronic control module to directly convert the target pitch angle into a rotation command to drive the pitch motor 310 without the need for complex nonlinear calculations or real-time trajectory compensation algorithms. This achieves a direct mapping between "command and position," enabling more precise control of the semicircular cover plate 410 to swing in pitch, thus allowing for more accurate adjustment of the holographic display at different pitch angles. Under the constraint of the optical module 400 being mounted on top, the combination of a two-stage series parallelogram linkage structure and a virtual rotation center O1 design simultaneously achieves a low center of gravity, high rigidity, and easy control, solving the motion accuracy problem under high-density integration.

[0045] Furthermore, the pitch linkage unit 330 mentioned above also has the following advantages: (1) Motion decoupling design: It adopts a configuration of two-stage parallelogram linkage structures connected in series. The first parallelogram linkage structure completes the motion transformation and virtual center fitting, and the second parallelogram linkage structure realizes the basic motion transmission. The motion between the two-stage linkage structures is completely decoupled, which reduces the design complexity. (2) Error non-cumulative characteristic: The parallelogram linkage structure itself has the advantages of high motion determinism and no error transmission. After being connected in series, this characteristic is still maintained, ensuring the overall motion accuracy.

[0046] like Figure 3As shown, more preferably, due to the structural interference of the optical module 400, forcibly placing the rotary drive motor 210 on the rotation axis would significantly increase the device height. Therefore, the rotary drive motor 210 cannot be placed on the rotation axis of the rotating body 220. To reduce the installation space required for this in-vehicle holographic interactive device, the rotary drive motor 210 is arranged laterally and fixed to the rotating body 220 by a plastic bracket 212. Furthermore, the rotary drive motor 210 is offset from the rotation axis of the rotating body 220, while the optical module 400 is typically positioned along the axial direction of the rotating body 220, allowing the rotary drive motor 210 to effectively avoid the optical module 400. This layout, "trading space for height," perfectly avoids the optical module 400 and significantly reduces the device height.

[0047] like Figure 3 As shown, more preferably, the rotating assembly 200 further includes a first pinion 211 and a large gear 230; the first pinion 211 is fixedly connected to the output shaft of the rotating drive motor 210; the large gear 230 is rotatably connected to the rotating body 220 and is fixedly connected to the base 100, and the large gear 230 has teeth 231 on its upper part; the first pinion 211 and the large gear 230 mesh and drive each other, and the meshing gap between the first pinion 211 and the large gear 230 is small, so that the first pinion 211 and the large gear 230 run more smoothly.

[0048] Specifically, by forming an external meshing gear pair between the first pinion 211 and the large gear 230, the rotary drive motor 210 does not need to be mounted on the rotation axis of the rotating body, facilitating flexible adjustment of the motor's installation position. The center distance can be adjusted using the external meshing gear pair to adapt to different spatial constraints, thus accommodating the space limitations of different vehicle models. This also facilitates flexible adjustment of the motor's installation position and achieves speed reduction and torque increase. The rotary drive motor 210 uses a miniature worm gear self-locking motor as its drive source, ensuring transmission efficiency while achieving absolute self-locking under vibration conditions. This prevents image position deviation during vibration, thereby improving the stability of the holographic image display. Specifically, it aims to prevent image position drift caused by vehicle bumps. Furthermore, by integrating the worm gear pair inside the rotary drive motor 210, only one external gear reduction is needed. Compared to the traditional "motor + independent worm gearbox" solution, the axial length is reduced, and the weight is lighter.

[0049] like Figure 3As shown, more preferably, the rotating assembly 200 further includes a deep groove ball bearing 240 and a flathead screw 250. A thin-walled cylindrical boss 222 is integrally formed on the bottom of the rotating body 220. The boss 222 has an interference fit with the inner ring of the deep groove ball bearing 240. A bearing chamber 232 is provided at the lower part of the large gear 230. The bearing chamber 232 has a precise cylindrical surface (tolerance H7) to accommodate the deep groove ball bearing 240 and to radially limit its movement. A plurality of screw holes 233 are evenly distributed around the bearing chamber 232. 3. A flat-head screw 250 is screwed into the base 100. The screw nut 251 of the flat-head screw 250 presses against the upper side of the outer ring of the deep groove ball bearing 240. The lower side of the outer ring of the deep groove ball bearing 240 contacts the base 100, so that the flat-head screw 250 and the base 100 together axially limit the outer ring of the deep groove ball bearing 240. The screw nut 251 directly serves as the axial limiter of the deep groove ball bearing 240. Compared with the traditional "ring + end cover" solution, it saves 3-5mm of installation space in the axial direction of the deep groove ball bearing 240, reduces the number of assembly parts by 4, makes the installation more efficient, and can effectively reduce costs.

[0050] The rotating body 220 is supported by a deep groove ball bearing 240, eliminating the need for a traditional independent shaft and reducing the axial dimension by more than 40%, further compressing the equipment height. Furthermore, by using a large-diameter deep groove ball bearing 240 to support the rotating body 220, no additional reinforcing ribs or support frames are required. The high radial stiffness of the deep groove ball bearing 240 directly bears the main load, thereby reducing redundant support while ensuring a stable rotational connection of the rotating body 220 to the base 100. The instantaneous rotation center of the semi-circular cover plate 410 is fitted to the actual physical structure below, achieving a low center of gravity layout, improving the stability of the base 100's support for the rotating body 220, and enhancing the stability of the rotating body 220 during rotation.

[0051] In actual assembly, the rotating body 220 and the deep groove ball bearing 240 are pre-assembled as a rotary table-bearing module and supplied as standard parts. The large gear 230 is self-guidedly inserted into the rotary table-bearing module through the bearing housing 232, which is convenient for assembly and does not require the use of precision fixtures.

[0052] like Figure 3 As shown, the rotating body has an oblong hole 221 corresponding to the screw hole 233.

[0053] Due to the design of the waist-shaped hole 221, all flat-head screws 250 are inserted into the screw hole 233 from above the rotating body 220 and then screwed in to tighten. This assembly process does not require swinging the rotating body 220, thus reducing assembly time.

[0054] The "side-mounted drive + screw limit integrated" design of the aforementioned rotary component 200 and the "compact linkage" design of the pitch component 300 work together to achieve high-performance dual-degree-of-freedom integration in an ultra-thin space.

[0055] like Figure 1 As shown, more preferably, a cover 500 is fixedly disposed on the base 100. The cover 500 has an annular structure. The optical module 400 is located inside the cover 500. The upper side of the cover 500 is flush with the upper side of the optical module 400. A very small and uniform gap is left between the cover 500 and the optical module 400.

[0056] By adjusting the first link 331, the second link 332, and the third link 333, the virtual rotation center O1 is positioned on the mating axis of the semicircular cover plate 410 and the fixed cover plate 420. Through precise fitting of the virtual rotation center O1, when the semicircular cover plate 410 tilts and swings around the mating axis of the semicircular cover plate 410 and the fixed cover plate 420, a very small and uniform gap is maintained between the semicircular cover plate 410 and the fixed cover plate 420, as well as between the semicircular cover plate 410 and the cover 500, to meet higher appearance requirements. The width of the gap is less than 0.5 mm, and the semicircular cover plate 410 can tilt upwards by 30 degrees.

[0057] More preferably, the rotating body 220 has a rotating body stop 223 protruding outward. The rotating body stop 223 cooperates with the adjustable limiting member on the base 100 to allow any angle limit setting within the range of 0°-270°. Mechanical hard limit is achieved by the interference of the rotating body stop 223, and electronic soft limit is achieved by the encoder position. They work together to achieve double protection to prevent overshoot damage.

[0058] The aluminum alloy rotating body serves as a heat sink and forms a convection air duct through four waist-shaped holes 221, which facilitates the temperature rise control of the rotating drive motor 210.

[0059] like Figure 2 As shown, more preferably, the rotation component 200 and the pitch component 300 are both located inside the housing 500. The housing 500, the base 100, the semi-circular cover plate 410 and the fixed cover plate 420 together constitute the complete outer shell of the device, making the device cylindrical in shape and protecting the rotation component 200 and the pitch component 300.

[0060] like Figure 2 As shown, more preferably, in order to more stably support the semi-circular cover plate 410, there are two pitch linkage units 330. Both pitch linkage units 330 are connected to the semi-circular cover plate 410. The two symmetrically arranged pitch linkage units 330 are located on both sides of the semi-circular cover plate 410. The rotary drive motor 210 is connected to one of the pitch linkage units 330.

[0061] A fully symmetrical pitch linkage unit 330 is set on the other side of the large semicircular cover plate 410. This mechanism has no power input but moves completely synchronously with the active side, forming a closed-loop force structure with double-sided support. The double-sided symmetrical layout significantly improves the torsional deformation resistance of the large semicircular cover plate 410 in compound motion (rotation + pitch), ensuring the stability of the holographic image display.

[0062] All of the aforementioned gear pairs are made of plastic POM to achieve low noise, self-lubrication, and maintenance-free operation.

[0063] The pitch linkage unit 330 is made of aluminum alloy or engineering plastic. Its lightweight design and the mass distribution of the optical module 400 have been optimized through inertial matching to reduce dynamic impact during movement.

[0064] From materials, heat dissipation, and tolerances to manufacturability, the entire design is tailored to the vibration, temperature, and reliability requirements of the automotive environment, making it a truly mass-producible automotive-grade solution.

[0065] like Figures 1-3 As shown, an in-vehicle holographic interactive device includes a dynamic adjustment mechanism as described above, and an optical module 400 fixedly mounted on the dynamic adjustment mechanism. The rotation drive motor 210 and the pitch motor 310 are both controlled by an electronic control module, which can drive the optical module 400 to a target posture according to interactive commands such as voice and gestures or vehicle status. This allows the holographic image to be accurately and smoothly aligned with passengers in any position inside the vehicle.

[0066] The above embodiments are merely preferred embodiments of the present invention and should not be construed as limiting the scope of protection of the present invention. Any non-substantial changes and substitutions made by those skilled in the art based on the present invention shall fall within the scope of protection claimed by the present invention.

Claims

1. A dynamic adjustment mechanism, characterized in that, include: Base, rotation assembly, pitch assembly; The base, the rotation component, the pitch component, and the optical module are connected in sequence; The rotating assembly includes a rotary drive motor and a rotating body; the rotating body is rotatably mounted on the base; the rotary drive motor is used to drive the rotating body to rotate. The optical module includes a semi-circular cover plate; the semi-circular cover plate is provided with a holographic image component for displaying holographic images; The pitch assembly includes: a pitch motor, a pitch support, and a pitch linkage unit; the pitch linkage unit includes: a first link, a second link, a third link, and a fourth link; the first link, the second link, the third link, and the large semi-circular cover plate together constitute a first parallelogram linkage structure; the first link, the third link, the fourth link, and the pitch support together constitute a second parallelogram linkage structure; The pitch motor is used to drive the first link or the fourth link to swing, so that the pitch link unit drives the semicircular cover plate to swing around the virtual rotation center; the virtual rotation center is located at the edge of the upper surface of the semicircular cover plate; the swing direction of the semicircular cover plate intersects with the rotation direction of the rotating body.

2. The dynamic adjustment mechanism according to claim 1, characterized in that, The pitch assembly also includes a second pinion and a sector gear; the sector gear is fixedly connected to the fourth connecting rod, and the second pinion is fixedly connected to the output shaft of the pitch motor; the second pinion meshes with the sector gear and drives each other.

3. The dynamic adjustment mechanism according to claim 1, characterized in that, The rotary drive motor is arranged horizontally and is fixedly mounted on the rotating body. The rotary drive motor is offset from the rotation axis of the rotating body.

4. The dynamic adjustment mechanism according to claim 3, characterized in that, The rotating assembly further includes a first pinion and a large gear; the first pinion is fixedly connected to the output shaft of the rotating drive motor; the large gear is rotatably connected to the rotating body and is fixedly connected to the base; the first pinion and the large gear mesh and drive each other.

5. The dynamic adjustment mechanism according to claim 4, characterized in that, The rotating assembly also includes a deep groove ball bearing and a flat-head screw. A thin-walled cylindrical boss is integrally formed on the bottom of the rotating body, and the boss is interference-fitted with the inner ring of the deep groove ball bearing. A bearing chamber is provided at the lower part of the large gear to accommodate the deep groove ball bearing. Several screw holes are opened on the large gear and are evenly distributed around the bearing chamber. The flat-head screw is screwed into the screw hole, and the screw head of the flat-head screw presses against the upper side of the outer ring of the deep groove ball bearing. The lower side of the outer ring of the deep groove ball bearing contacts the base.

6. The dynamic adjustment mechanism according to claim 5, characterized in that, The rotating body has a waist-shaped hole corresponding to the screw hole.

7. The dynamic adjustment mechanism according to claim 1, characterized in that, A cover is provided on the base. The cover has a ring structure. The optical module is located inside the cover. The upper side of the cover is flush with the upper side of the optical module.

8. The dynamic adjustment mechanism according to claim 1, characterized in that, There are two pitch linkage units, both of which are connected to the large semicircular cover plate. The two symmetrically arranged pitch linkage units are located on both sides of the large semicircular cover plate.

9. A vehicle-mounted holographic interactive device, characterized in that, It includes the dynamic adjustment mechanism as described in any one of claims 1 to 8, and an optical module fixedly mounted on the dynamic adjustment mechanism.

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