Optical machine and wearable device
By directly rotating the lens barrel to the base and using a built-in linkage mechanism, rotational motion is converted into axial linear motion, solving the problem of excessively large optical lenses in smart wearable devices and achieving a compact optical system and a lightweight wearing experience.
Patent Information
- Application Number
- CN202522049420.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-23
- Publication Date
- 2026-11-03
- Estimated Expiration
- 2035-09-23
AI Technical Summary
Existing optical lenses are too bulky in smart wearable devices due to limited installation space, which affects the wearing experience and is especially unsuitable for long-term wear.
The lens barrel and base are directly rotatably connected. Combined with the built-in linkage mechanism, the rotational motion of the lens barrel is converted into the axial linear motion of the floating seat. The external rotating sleeve is eliminated, and the drive function is built-in and coaxial. The lens spacing is precisely adjusted through the spiral guide and axial guide mechanism.
It has achieved miniaturization and compactness of optical lenses, meeting the long-term wearing needs of smart wearable devices and improving the user experience.
Smart Images
Figure CN224934251U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of optical lens technology, specifically relating to an optical engine and wearable device. Background Technology
[0002] Optical lenses in image acquisition devices typically consist of multiple lenses, and focusing can be achieved by changing the spacing between the lenses. When optical lenses are used in smart wearable devices, the limited installation space necessitates even greater miniaturization. However, existing optical lenses generally employ a composite mounting method using a lens barrel, with a rotating sleeve added to the outside of the barrel to adjust the position of the corresponding lenses within the inner barrel. This results in excessively large radial and axial dimensions of the optical lens, leading to bulky wearable devices with poor comfort, particularly unsuitable for applications requiring prolonged wear. Summary of the Invention
[0003] In view of the shortcomings of the prior art described above, the purpose of this utility model is to provide an optical engine and wearable device that can reduce the size of the optical engine while retaining the focusing function, so as to meet the long-term wearing needs of wearable devices.
[0004] To achieve the above and other related objectives, this utility model provides an optical engine, comprising: A fixed lens, an intermediate lens, a movable lens, and a display screen arranged sequentially along a preset direction; and A base for mounting the display screen; A lens barrel is used to mount the fixed lens and the intermediate lens, and the lens barrel is rotatably connected to the base about an axis parallel to the preset direction; A floating base is used to mount the movable lens. The floating base is housed inside the lens barrel and is movably connected to the base along the preset direction. A linkage mechanism is provided between the lens barrel and the floating base. The linkage mechanism is configured to drive the floating base to reciprocate along the preset direction when the lens barrel rotates relative to the base.
[0005] In an optional embodiment of this utility model, the projection of the linkage mechanism in the preset direction is located within the projection area of the mirror barrel in the preset direction.
[0006] In an optional embodiment of this utility model, the linkage mechanism includes a spiral guide portion and a first guided portion that is slidably disposed along the spiral guide portion. One of the spiral guide portion and the first guided portion is disposed in the lens barrel, and the other is disposed in the floating seat.
[0007] In an optional embodiment of the present invention, the spiral guide portion includes a spiral groove, and the first guided portion includes a guide pin that is partially accommodated in the spiral groove and slides in cooperation with the spiral groove.
[0008] In an optional embodiment of this utility model, an axial guide mechanism is provided between the floating seat and the base for guiding the floating seat to move along the preset direction, and the projection of the axial guide mechanism in the preset direction is located within the projection area of the mirror barrel in the preset direction.
[0009] In an optional embodiment of this utility model, the axial guiding mechanism includes a guide post and a guide hole that slides with the guide post. One of the guide post and the guide hole is disposed on the base, and the other is disposed on the floating seat.
[0010] In an optional embodiment of this utility model, a circumferential guiding mechanism is provided between the lens barrel and the base for guiding the lens barrel to rotate relative to the base about an axis parallel to the preset direction, and the projection of the circumferential guiding mechanism in the preset direction is located within the projection area of the lens barrel in the preset direction.
[0011] In an optional embodiment of the present invention, the circumferential guiding mechanism includes an arc-shaped guiding portion and a second guided portion that is slidably disposed along the arc-shaped guiding portion. One of the arc-shaped guiding portion and the second guided portion is disposed on the base, and the other is disposed on the lens barrel.
[0012] In an optional embodiment of the present invention, the circumferential guiding mechanism is configured to limit the lens barrel to reciprocate within a preset angle range relative to the base.
[0013] In an optional embodiment of this utility model, the base includes a circular plate-shaped body, and the arc-shaped guide portion includes an arc-shaped notch disposed on the circumferential surface of the plate-shaped body; the lens barrel abuts against one side of the plate-shaped body, and the second guided portion includes a buckle extending from the lens barrel to the other side of the plate-shaped body, the buckle being accommodated in the arc-shaped notch, and the end of the buckle away from the lens barrel having a claw protruding towards the center of the plate-shaped body, the claw abutting against the side of the plate-shaped body away from the lens barrel.
[0014] In an optional embodiment of this utility model, the arc-shaped notch and the buckle are respectively provided at intervals along the circumference of the base and the lens barrel.
[0015] In an optional embodiment of this utility model, a planar protective lens is provided on the side of the fixed lens away from the movable lens, and the protective lens is installed on the lens barrel.
[0016] In an optional embodiment of this utility model, a heat sink is provided on the side of the display screen away from the movable lens, the heat sink is mounted on the base, and the heat sink is thermally connected to the display screen.
[0017] In an optional embodiment of this utility model, the movable lens is a convex lens, and the floating seat is provided with a recessed platform for accommodating the edge region of the movable lens. An inclined surface is provided on the stepped surface of the recessed platform opposite to the convex surface of the movable lens, and a gap for filling structural adhesive is provided between the inclined surface and the edge region of the convex surface of the movable lens.
[0018] In an optional embodiment of this utility model, an axial guide mechanism is provided between the floating seat and the base for guiding the floating seat to move along the preset direction, and the projection of the axial guide mechanism in the preset direction is located within the projection area of the sinking platform in the preset direction.
[0019] To achieve the above and other related objectives, this utility model also provides a wearable device, comprising: Eyeglass frames, the frames being configured to be worn on the human face; and The aforementioned optical engine is mounted on the lens frame and is configured as follows: In response to the state of the eyeglasses being worn on the human face, the optical engine is positioned in front of the human eye.
[0020] The technical advantages of this invention are as follows: By directly rotating the lens barrel to the base and eliminating the traditional external rotating sleeve, this invention adopts a built-in linkage mechanism to convert the rotational motion of the lens barrel into the precise axial linear motion of the floating seat. This allows the mechanical structure that drives the moving lens to be highly integrated between the lens barrel and the floating seat, rather than being superimposed on the outside, thus eliminating redundant space at the source. The linkage mechanism couples circumferential rotation into axial displacement, realizing the internalization and coaxiality of the driving function. This eliminates the need for additional radial and axial stacking structures to change the lens spacing. Because this design has no external sleeve and the transmission mechanism does not increase in length, it significantly reduces the radial and axial dimensions of the optical lens. Ultimately, this achieves miniaturization and compactness of the overall optical system structure, perfectly meeting the stringent requirements of smart wearable devices for ultra-small size and lightweight wearing experience, and satisfying the comfort requirements of long-term wear of virtual reality devices. Attached Figure Description
[0021] Figure 1 This is a perspective view of the optical engine provided in an embodiment of the present invention; Figure 2 This is a perspective view of the optical engine provided in an embodiment of the present invention; Figure 3 This is a front view of the optical engine provided in an embodiment of the present invention; Figure 4 yes Figure 3 AA section view; Figure 5 yes Figure 4 A magnified view of part of the I; Figure 6 This is an exploded view of the optical engine provided in an embodiment of this utility model; Figure 7 This is an exploded view of the linkage mechanism provided in an embodiment of this utility model; Figure 8 This is an exploded view of the axial guide mechanism provided in an embodiment of this utility model; Figure 9 This is an exploded view of the axial guide mechanism provided in an embodiment of this utility model; Explanation of reference numerals in the attached drawings: 10, fixed lens; 20, intermediate lens; 30, movable lens; 40, display screen; 50, base; 51, guide post; 52, arc-shaped notch; 60, lens barrel; 61, spiral guide part; 62, buckle; 621, claw; 70, floating seat; 71, first guided part; 72, guide hole; 73, countersunk platform; 731, gap; 80, protective lens; 90, heat sink. Detailed Implementation
[0022] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. It should be noted that, unless otherwise specified, the following embodiments and features described therein can be combined with each other.
[0023] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Therefore, the illustrations only show the components related to the present invention and are not drawn according to the number, shape and size of the components in actual implementation. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.
[0024] Please see Figure 1-9As shown, the optical engine provided in the embodiment of this utility model includes a fixed lens 10, an intermediate lens 20, a movable lens 30, a display screen 40, a base 50, a lens barrel 60, and a floating base 70. In a specific embodiment, the fixed lens 10 and the movable lens 30 can be convex lenses, and the intermediate lens 20 can be a concave lens. Here, the lens arrangement is a commonly used pancake scheme in optical engines. The intermediate lens mainly performs chromatic aberration correction and may not be used in some pancake scheme designs. The fixed lens 10, the intermediate lens 20, the movable lens 30, and the display screen 40 are arranged sequentially along a preset direction. The system includes: a base 50 for mounting the display screen 40; a lens barrel 60 for mounting the fixed lens 10 and the intermediate lens 20, the lens barrel 60 being rotatably connected to the base 50 about an axis parallel to the preset direction; a floating seat 70 for mounting the movable lens 30, the floating seat 70 being housed within the lens barrel 60, and the floating seat 70 being movably connected to the base 50 along the preset direction; and a linkage mechanism between the lens barrel 60 and the floating seat 70, the linkage mechanism being configured to drive the floating seat 70 to reciprocate along the preset direction when the lens barrel 60 rotates relative to the base 50.
[0025] This invention directly rotatably connects the lens barrel 60 to the base 50, abandoning the traditional external rotating sleeve and instead employing a built-in linkage mechanism. This transforms the rotational motion of the lens barrel 60 into the precise axial linear motion of the floating seat 70, thereby eliminating redundant space at its source. The linkage mechanism couples circumferential rotation into axial displacement, achieving built-in and coaxial drive functionality. This eliminates the need for additional radial and axial stacking structures to change the lens spacing. Because this design eliminates the need for an external sleeve and does not add extra length to the transmission mechanism, it significantly reduces the radial and axial dimensions of the optical lens, ultimately achieving miniaturization and compactness of the overall optical system structure. This perfectly meets the stringent requirements of smart wearable devices for ultra-small size and lightweight wearing experience.
[0026] Please see Figure 3 , 4As shown, in an optional embodiment of this utility model, the projection of the linkage mechanism in the preset direction is located within the projection area of the lens barrel 60 in the preset direction. This embodiment achieves a zero-overflow design of the transmission components from a spatial layout perspective by completely confining the projection of the linkage mechanism in the preset direction within the projection area of the lens barrel 60. This means that all the movement space required by the linkage mechanism is contained within the inherent cylindrical space occupied by the lens barrel 60 itself. Through extreme space reuse, the need to increase the radial or axial dimensions of the lens barrel 60 due to the additional setting of the transmission mechanism is completely avoided. Therefore, this design eliminates the bulky problem caused by the drive components surrounding or protruding from the lens barrel 60 in traditional structures, allowing the radial dimension of the entire optical lens to reach the theoretical minimum, that is, directly determined by the diameter of the lens barrel 60 and the lens. This greatly promotes the integration and miniaturization level of the optical lens within the limited installation space of smart wearable devices.
[0027] Please see Figure 7 As shown, in an optional embodiment of this utility model, the linkage mechanism includes a spiral guide portion 61 and a first guided portion 71 slidably disposed along the spiral guide portion 61. One of the spiral guide portion 61 and the first guided portion 71 is disposed on the lens barrel 60, and the other is disposed on the floating seat 70. This embodiment, by employing a spiral transmission mechanism composed of the spiral guide portion 61 and the first guided portion 71, efficiently, accurately, and smoothly converts the rotational motion of the lens barrel 60 into the axial linear displacement of the floating seat 70. The inherent continuous inclined surface structure of the spiral can decompose the circumferential rotational force into the axial driving force without impact, thereby realizing the linear conversion between rotation and translation. This design not only ensures a smooth and unhindered focusing process, improving the reliability of the system and the user experience, but more importantly, this integrated, self-contained transmission method does not require the introduction of additional gears or connecting rods or other complex components. Its structure is extremely compact, achieving zero space overflow in the simplest way, further realizing the miniaturization of the lens design, while ensuring focusing accuracy and motion stability.
[0028] Please see Figure 7As shown, in an optional embodiment of this utility model, the spiral guide 61 includes a spiral groove, and the first guided part 71 includes a guide pin partially accommodated within the spiral groove and slidingly engaged with it. This embodiment, by specifying the spiral guide 61 as a spiral groove and the first guided part 71 as a guide pin that slides with it, achieves a compact, efficient, and reliable power transmission path in terms of specific structure. The spiral groove provides precise and robust three-dimensional spatial trajectory constraints for the movement of the guide pin. Its groove structure not only reliably captures and guides the guide pin, seamlessly converting rotation into axial movement, but more importantly, it completely confines the entire transmission process within the internal space of the lens barrel 60 wall thickness. This embedded design avoids the need for additional cams or guide rails on the outer or inner surface of the lens barrel 60, thereby maximizing the use of the lens barrel 60 body material and achieving power transmission with zero additional space occupation. This design ensures precise and smooth focusing while maximizing the space utilization of the mechanical structure.
[0029] Please see Figure 4 , 5 As shown in Figure 8, in an optional embodiment of this utility model, an axial guiding mechanism is provided between the floating seat 70 and the base 50 to guide the floating seat 70 to move along the preset direction. The projection of the axial guiding mechanism in the preset direction is located within the projection area of the lens barrel 60 in the preset direction. This embodiment provides a highly integrated solution to the stability and accuracy problems of the floating seat 70 in reciprocating motion by adding an axial guiding mechanism that is completely embedded in the projection area of the lens barrel 60. The guiding mechanism is not independent of the main structure, but cleverly utilizes the existing space inside the lens barrel 60 to provide the necessary linear track constraint for the axial movement of the floating seat 70, thereby effectively preventing it from radially shifting or deflecting. This design significantly improves the linear accuracy and motion stability of the lens movement during focusing without increasing the overall radial dimension of the system, ensuring the alignment consistency of the optical axis and the imaging quality.
[0030] Please see Figure 4 , 5As shown in Figure 8, in an optional embodiment of this utility model, the axial guiding mechanism includes a guide post 51 and a guide hole 72 that slides with the guide post 51. One of the guide post 51 and the guide hole 72 is disposed on the base 50, and the other is disposed on the floating seat 70. This embodiment uses a sliding pair composed of the guide post 51 and the guide hole 72 as the specific implementation of the axial guiding mechanism, seamlessly integrating high-precision linear guiding function into the existing structural space. The guide post 51 and the guide hole 72 provide stable and low-friction linear motion constraints with a simple cylindrical mating surface, ensuring the coaxiality of the floating seat 70's motion trajectory with the optical axis. This design effectively eliminates the risk of radial sway and tilting of the floating seat 70 in reciprocating motion, ensuring the centering accuracy and imaging stability of the lens assembly. In addition, this guiding structure itself has a small radial dimension and can be easily accommodated within the projection range of the lens barrel 60.
[0031] Please see Figure 9 As shown, in an optional embodiment of this utility model, a circumferential guiding mechanism is provided between the lens barrel 60 and the base 50 to guide the lens barrel 60 to rotate relative to the base 50 about an axis parallel to the preset direction. The projection of the circumferential guiding mechanism in the preset direction is located within the projection area of the lens barrel 60 in the preset direction. This embodiment provides a precise and stable rotational reference for the rotational movement of the lens barrel 60 by providing a circumferential guiding mechanism between the lens barrel 60 and the base 50; by placing the projection of the circumferential guiding mechanism within the projection area of the lens barrel 60, a compact support system is provided for the rotation of the lens barrel 60, ensuring axial stability and smooth rotation during the rotation of the lens barrel 60, effectively preventing transmission jamming, wear, and optical offset caused by shaking or eccentricity, while avoiding an increase in the radial or axial dimensions of the system due to the additional guiding structure.
[0032] Please see Figure 9As shown, in an optional embodiment of this utility model, the circumferential guiding mechanism includes an arc-shaped guiding part and a second guided part slidably disposed along the arc-shaped guiding part. One of the arc-shaped guiding part and the second guided part is disposed on the base 50, and the other is disposed on the lens barrel 60. This embodiment uses a sliding pair composed of the arc-shaped guiding part and the second guided part as the specific implementation of the circumferential guiding mechanism, transforming the rotational guiding function required by the lens barrel 60 into a highly integrated and space-efficient mechanical constraint. The arc-shaped guiding part provides the second guided part with a precision sliding track that perfectly matches the rotation trajectory of the lens barrel 60, which can stably limit the rotation of the lens barrel 60 on a preset axis, while effectively bearing radial force to avoid swaying. This design ensures the smoothness and accuracy of the rotation process of the lens barrel 60, providing a reliable input basis for the axial displacement of the floating seat 70. In addition, by directly setting the rotational guiding function between the lens barrel 60 and the base 50, there is no need to rely on external bearings or large bushings, thereby achieving high-precision motion control under the premise of extreme compression of radial dimensions.
[0033] Please see Figure 9 As shown, in an optional embodiment of this utility model, the circumferential guiding mechanism is configured to limit the reciprocating rotation of the lens barrel 60 relative to the base 50 within a preset angle range. This embodiment sets a safe physical travel limit for the entire focusing system by configuring the circumferential guiding mechanism to limit the rotation of the lens barrel 60 within a preset angle range. The rotation angle of the lens barrel 60 is linearly related to the axial displacement of the floating seat 70 through a screw transmission mechanism. Therefore, limiting the rotation angle of the lens barrel 60 is directly equivalent to limiting the axial movement range of the floating seat 70 and the movable lens 30 mounted on it. This design, by limiting the length of the arc-shaped guiding part, effectively prevents the movable lens 30 from exceeding its travel range due to excessive rotation of the lens barrel 60 by the user, avoiding the risk of the lens colliding with the base 50, display screen 40, or other internal components, thereby ensuring the safety of the optical components and the durability of the entire mechanism.
[0034] Please see Figure 9As shown, in an optional embodiment of this utility model, the base 50 includes a circular plate-shaped body, and the arc-shaped guide portion includes an arc-shaped notch 52 disposed on the circumferential surface of the plate-shaped body; the lens barrel 60 abuts against one side of the plate-shaped body, and the second guided portion includes a buckle 62 extending from the lens barrel 60 to the other side of the plate-shaped body. The buckle 62 is accommodated in the arc-shaped notch 52, and the end of the buckle 62 away from the lens barrel 60 is provided with a claw 621 protruding towards the center of the plate-shaped body. The claw 621 abuts against the side of the plate-shaped body away from the lens barrel 60. This embodiment concretizes the arc-shaped guide part as an arc-shaped notch on the circumference of the base 50, and designs the second guided part as a buckle 62 structure with a claw 621, realizing an extremely compact and simple assembly integrated solution for circumferential limiting and axial fixing. The way the buckle 62 passes through the arc-shaped notch allows it to use the side wall of the notch as an arc-shaped guide rail to limit the rotation angle of the lens barrel 60, and can also hook onto the back of the base 50 through the claw 621 at the end to form an axial lock, firmly restraining the lens barrel 60 on the base 50 and preventing it from falling off. This design solves the two key requirements of rotation guidance and axial fixing at the same time with only the buckle 62, simplifying the structure to the maximum extent, reducing the number of parts, and avoiding the space occupied by additional screws or pressure rings and other fasteners. This allows the entire lens module to obtain reliable rotation limiting and axial holding functions while further compressing the axial dimension.
[0035] Please see Figure 9 As shown, in an optional embodiment of this utility model, multiple arc-shaped notches 52 and buckles 62 are respectively arranged at intervals along the circumference of the base 50 and the lens barrel 60. This embodiment, by arranging multiple arc-shaped notches 52 and buckles 62 at intervals along the circumference, decomposes and evenly transmits the circumferential torque and axial force on the lens barrel 60 to the entire circumference of the base 50, thereby greatly enhancing the stability, concentricity, and mechanical strength of the axial connection during rotation. This design effectively prevents localized wear, jamming, or structural deformation that may result from single-point force application, ensuring smooth and precise rotation of the lens barrel 60 within a preset angle, providing higher reliability for the focusing mechanism. Simultaneously, the locking of multiple buckles 62 significantly improves the stability of the connection between the lens barrel 60 and the base 50, making it more resistant to impacts and vibrations.
[0036] Please see Figure 1 , 3As shown in Figures 4 and 6, in an optional embodiment of this utility model, a planar protective lens 80 is provided on the side of the fixed lens 10 away from the movable lens 30, and the protective lens 80 is installed on the lens barrel 60. This embodiment provides front-end physical protection for the entire optical system by adding a planar protective lens 80 installed on the front end of the outermost fixed lens 10. The planar protective lens 80, as the first barrier of the optical lens, can directly resist potential damage such as external dust, moisture, fingerprints, or scratches. Its flat shape is less prone to damage than a protruding lens and is easy to clean. This design significantly improves the environmental adaptability, durability, and reliability of the module, effectively protects the expensive internal lens group, extends the product life, and enables smart wearable devices to meet the requirements of extreme miniaturization while adapting to the application scenarios of daily use and even harsh environments.
[0037] Please see Figure 2 , 4 As shown in Figures 6 and 7, in an optional embodiment of this utility model, a heat sink 90 is provided on the side of the display screen 40 away from the movable lens 30. The heat sink 90 is installed on the base 50 and is thermally connected to the display screen 40. This embodiment provides an efficient thermal management path for the high-power-density display screen 40 by setting a heat sink 90 behind the display screen 40 and mounting it to the base 50 and thermally connecting it. The heat continuously generated by the display screen 40 during operation is quickly transferred to the heat sink 90, which has a large surface area, through direct thermal connection. The heat sink 90 diffuses the heat laterally to avoid local overheating and dissipates the heat through contact with the external environment. This design effectively prevents problems such as performance degradation, signal-to-noise ratio reduction, or shortened lifespan of the display screen 40 caused by overheating, ensuring the stability and reliability of image quality. In addition, by directly integrating the heat dissipation system into the support structure of the base 50, the internal space of the device is fully utilized for heat conduction, rather than radial expansion. This solves the increasingly serious heat dissipation problem in miniaturized packaging without significantly increasing the overall size of the module, ensuring the continuous high-performance operation of the lens in a compact space.
[0038] Please see Figure 4 , 5As shown, in an optional embodiment of the present invention, the movable lens 30 is a convex lens, and the floating seat 70 is provided with a recessed platform 73 for accommodating the edge region of the movable lens 30. The stepped surface of the recessed platform 73 opposite to the convex surface of the movable lens 30 is provided with an inclined surface, and a gap 731 for filling structural adhesive is provided between the inclined surface and the convex edge region of the movable lens 30. This embodiment achieves a high-precision and high-reliability lens installation and fixing method by setting an inclined surface on the stepped surface of the platform 73 of the floating seat 70, forming a gap 731 for filling structural adhesive with the convex edge of the movable lens 30. The wedge-shaped gap 731 naturally formed by the inclined surface structure and the convex edge of the lens provides a uniform and controllable filling space for the structural adhesive. After curing, the adhesive can form a bidirectional locking force from radial to axial direction to firmly bond the lens to the floating seat 70. This design ensures that the optical center of the movable lens 30 is precisely aligned with the movement axis of the floating seat 70, avoiding eccentricity and tilting during focusing and greatly improving imaging stability. In addition, the inclined surface-guided adhesive method provides a larger bonding area and stronger mechanical strength compared with planar contact, which can effectively resist the impact and vibration during movement and prevent the lens from loosening.
[0039] Please see Figure 4 , 5 As shown in Figure 8, in an optional embodiment of this utility model, the projection of the axial guiding mechanism in the preset direction is located within the projection area of the recessed platform 73 in the preset direction. This embodiment achieves a high degree of reuse of the mechanical guiding structure and the optical component installation space by completely setting the projection of the axial guiding mechanism within the projection area of the recessed platform 73; by using the recessed platform 73 structure on the floating seat 70, which is necessary to accommodate the movable lens 30, as the arrangement area of the guiding mechanism, the guiding function does not need to occupy additional space. This design completely eliminates the risk of increased radial or axial dimensions of the floating seat 70 due to the addition of a guiding mechanism at the physical level, ensuring not only the accuracy and stability of the lens focusing movement, but also minimizing the volume of the entire floating seat 70 assembly while meeting all functions.
[0040] This utility model also provides a wearable device, which includes a frame and the aforementioned optical engine; the frame is configured to be worn on the human face; the optical engine is mounted on the frame and configured such that, in response to the frame being worn on the human face, the optical engine is positioned in front of the human eye. In a specific embodiment, the wearable device may be, for example, virtual reality glasses, particularly virtual reality glasses that need to be worn for extended periods, such as virtual reality glasses used to replace nearsighted or reading glasses. This application example directly meets the comfort requirements of long-term wear of virtual reality devices by integrating an ultra-miniaturized and lightweight optical engine into a wearable frame and positioning it directly in front of the user's eyes. The aforementioned innovations in the optical engine have collectively led to a significant reduction in its radial and axial dimensions, which greatly reduces the overall size and weight of the final wearable device. This completely avoids the oppressive and cumbersome feeling caused by the bulky lenses of traditional devices. The device can achieve powerful virtual reality visual functions in a lightweight form similar to ordinary glasses, greatly reducing the burden on the user's face, especially the bridge of the nose, and eliminating physical fatigue and psychological rejection caused by long-term wear. Thus, it is truly suitable for daily, all-weather use as a replacement for traditional nearsighted or presbyopic glasses.
[0041] In summary, this invention directly rotatably connects the lens barrel 60 to the base 50, abandoning the traditional external rotating sleeve and instead employing a built-in linkage mechanism. This transforms the rotational motion of the lens barrel 60 into the precise axial linear motion of the floating seat 70, allowing the mechanical structure driving the movement of the movable lens 30 to be highly integrated between the lens barrel 60 and the floating seat 70, rather than being superimposed on the outside, thus eliminating redundant space at the source. The linkage mechanism couples circumferential rotation into axial displacement, achieving built-in and coaxial driving functions. This eliminates the need for additional radial and axial stacking structures to change the lens spacing. Because this design eliminates the need for an external sleeve and does not add extra length to the transmission mechanism, it significantly reduces the radial and axial dimensions of the optical lens, ultimately achieving miniaturization and compactness of the overall optical system structure. This perfectly meets the stringent requirements of smart wearable devices for ultra-small size and lightweight wearing experience, satisfying the comfort requirements of long-term wear of virtual reality devices.
[0042] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.
[0043] Throughout this description, numerous specific details, such as examples of components and / or methods, are provided to provide a complete understanding of embodiments of the present invention. However, those skilled in the art will recognize that embodiments of the present invention may be practiced without one or more of these specific details or by other devices, systems, components, methods, parts, materials, components, etc. In other instances, well-known structures, materials, or operations have not been specifically shown or described in detail to avoid obscuring aspects of embodiments of the present invention.
Claims
1. An optical engine, characterized in that, include: A fixed lens (10), a movable lens (30), and a display screen (40) arranged sequentially along a preset direction; as well as A base (50) for mounting the display screen (40); The lens barrel (60) is used to mount the fixed lens (10), and the lens barrel (60) is rotatably connected to the base (50) about an axis parallel to the preset direction; A floating seat (70) is used to mount the movable lens (30). The floating seat (70) is housed inside the lens barrel (60). The floating seat (70) is movably connected to the base (50) along the preset direction. A linkage mechanism is provided between the lens barrel (60) and the floating seat (70). The linkage mechanism is configured to drive the floating seat (70) to reciprocate along the preset direction when the lens barrel (60) rotates relative to the base (50).
2. The optical engine according to claim 1, characterized in that, The projection of the linkage mechanism in the preset direction is located within the projection area of the mirror tube (60) in the preset direction.
3. The optical engine according to claim 2, characterized in that, The linkage mechanism includes a spiral guide (61) and a first guided part (71) that slides along the spiral guide (61). One of the spiral guide (61) and the first guided part (71) is disposed on the lens barrel (60), and the other is disposed on the floating seat (70).
4. The optical engine according to claim 3, characterized in that, The spiral guide (61) includes a spiral groove, and the first guided part (71) includes a guide pin that is partially accommodated in the spiral groove and slides in cooperation with the spiral groove.
5. The optical engine according to claim 1, characterized in that, An axial guide mechanism is provided between the floating seat (70) and the base (50) to guide the floating seat (70) to move along the preset direction. The projection of the axial guide mechanism in the preset direction is located in the projection area of the mirror tube (60) in the preset direction.
6. The optical engine according to claim 5, characterized in that, The axial guiding mechanism includes a guide post (51) and a guide hole (72) that slides with the guide post (51). One of the guide post (51) and the guide hole (72) is disposed on the base (50), and the other is disposed on the floating seat (70).
7. The optical engine according to claim 1, characterized in that, A circumferential guiding mechanism is provided between the lens barrel (60) and the base (50) to guide the lens barrel (60) to rotate relative to the base (50) about an axis parallel to the preset direction. The projection of the circumferential guiding mechanism in the preset direction is located in the projection area of the lens barrel (60) in the preset direction.
8. The optical engine according to claim 7, characterized in that, The circumferential guiding mechanism includes an arc-shaped guiding part and a second guided part that is slidably disposed along the arc-shaped guiding part. One of the arc-shaped guiding part and the second guided part is disposed on the base (50), and the other is disposed on the lens barrel (60).
9. The optical engine according to claim 8, characterized in that, The circumferential guiding mechanism is configured to limit the lens barrel (60) to reciprocate within a preset angle range relative to the base (50).
10. The optical engine according to claim 9, characterized in that, The base (50) includes a circular plate-shaped body, and the arc-shaped guide includes an arc-shaped notch (52) disposed on the circumferential surface of the plate-shaped body; the lens barrel (60) abuts against one side of the plate-shaped body, and the second guided part includes a buckle (62) extending from the lens barrel (60) to the other side of the plate-shaped body. The buckle (62) is accommodated in the arc-shaped notch (52), and the end of the buckle (62) away from the lens barrel (60) is provided with a claw (621) protruding towards the center of the plate-shaped body. The claw (621) abuts against the side of the plate-shaped body away from the lens barrel (60).
11. The optical engine according to claim 10, characterized in that, The arc-shaped notch (52) and the buckle (62) are provided at intervals along the circumference of the base (50) and the lens barrel (60).
12. The optical engine according to claim 1, characterized in that, The fixed lens (10) has a planar protective lens (80) on the side away from the movable lens (30), and the protective lens (80) is mounted on the lens barrel (60).
13. The optical engine according to claim 1, characterized in that, A heat sink (90) is provided on the side of the display screen (40) away from the movable lens (30). The heat sink (90) is mounted on the base (50) and is thermally connected to the display screen (40).
14. The optical engine according to claim 1, characterized in that, The movable lens (30) is a convex lens. The floating seat (70) is provided with a recess (73) for accommodating the edge area of the movable lens (30). The recess (73) has an inclined surface on the step surface opposite to the convex surface of the movable lens (30). A gap (731) for filling structural adhesive is provided between the inclined surface and the edge area of the convex surface of the movable lens (30).
15. The optical engine according to claim 14, characterized in that, An axial guide mechanism is provided between the floating seat (70) and the base (50) to guide the floating seat (70) to move along the preset direction. The projection of the axial guide mechanism in the preset direction is located in the projection area of the sinking platform (73) in the preset direction.
16. A wearable device, characterized in that, include: Eyeglass frames, the frames being configured to be worn on the human face; as well as The optical engine according to any one of claims 1 to 15, wherein the optical engine is mounted on the lens frame, and the optical engine is assembled as follows: In response to the state of the eyeglasses being worn on the human face, the optical engine is positioned in front of the human eye.