Optical machine and wearable device

Abstract

The invention belongs to the technical field of optical lenses, and particularly relates to an optical machine and wearable equipment, and the optical machine comprises a fixed lens, a movable lens and a display screen which are sequentially arranged in a preset direction. The base is used for mounting the display screen; the lens barrel is used for installing the fixed lens, and the lens barrel is rotationally connected with the base around the axis parallel to the preset direction; the floating seat is used for mounting the movable lens, the floating seat is accommodated in the lens cone, and the floating seat is movably connected with the base along the preset direction; and a linkage mechanism is arranged between the lens cone and the floating seat. The linkage mechanism converts the rotary motion of the lens barrel into the accurate axial linear motion of the floating seat, so that a mechanical structure for driving the movable lens to move is highly integrated between the lens barrel and the floating seat, the radial size and the axial size of the optical lens are remarkably reduced, and the comfort requirement of long-term wearing of virtual reality equipment is met.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of optical lens, and particularly relates to an optical mechanism and a wearable device. BACKGROUND

[0002] The optical lens of an image acquisition device is generally composed of multiple lenses, and the focusing function can be realized by changing the distance between the lenses. When the optical lens is applied to a smart wearable device, the miniaturization of the optical lens is required due to the limited installation space. However, the existing optical lens generally installs multiple lenses through a barrel complex wrapping type, and then installs a rotating sleeve outside the barrel to change the position of the corresponding lens in the inner barrel, which results in that the radial size and the axial size of the optical lens are too large, and further results in that the volume of the wearable device is too bulky, the wearing experience is poor, and especially the smart wearable device cannot adapt to the application scene requirement of long-term wearing. SUMMARY

[0003] In view of the above-mentioned shortcomings of the prior art, the purpose of the present application is to provide an optical mechanism and a wearable device, which can reduce the volume of the optical mechanism while retaining the focusing function, so as to meet the long-term wearing requirement of the wearable device.

[0004] To achieve the above-mentioned purpose and other related purposes, the present application provides an optical mechanism, comprising:

[0005] a fixed lens, an intermediate lens, a moving lens and a display screen arranged in sequence along a preset direction; and

[0006] a base for installing the display screen;

[0007] a barrel for installing the fixed lens and the intermediate lens, the barrel being rotationally connected with the base about an axis parallel to the preset direction;

[0008] a floating seat for installing the moving lens, the floating seat being accommodated in the barrel and movably connected with the base along the preset direction;

[0009] a linkage mechanism is arranged between the barrel and the floating seat, and the linkage mechanism is configured to drive the floating seat to reciprocate along the preset direction when the barrel rotates relative to the base.

[0010] In an optional embodiment of the present application, the projection of the linkage mechanism in the preset direction is located in the projection area of the barrel in the preset direction.

[0011] In an optional embodiment of the present application, the linkage mechanism comprises a helical guide portion and a first guided portion slidingly arranged along the helical guide portion, one of the helical guide portion and the first guided portion is arranged on the lens barrel and the other is arranged on the floating seat.

[0012] In an optional embodiment of the present application, the helical guide portion comprises a helical groove and the first guided portion comprises a guide pin partially accommodated in the helical groove and slidingly fitted with the helical groove.

[0013] In an optional embodiment of the present application, an axial guide mechanism is arranged between the floating seat and the base for guiding the floating seat to move along the preset direction, a projection of the axial guide mechanism on the preset direction is located within a projection area of the lens barrel on the preset direction.

[0014] In an optional embodiment of the present application, the axial guide mechanism comprises a guide post and a guide hole slidingly fitted with the guide post, one of the guide post and the guide hole is arranged on the base and the other is arranged on the floating seat.

[0015] In an optional embodiment of the present application, a circumferential guide mechanism is arranged between the lens barrel and the base for guiding the lens barrel to rotate relative to the base around an axis parallel to the preset direction, a projection of the circumferential guide mechanism on the preset direction is located within a projection area of the lens barrel on the preset direction.

[0016] In an optional embodiment of the present application, the circumferential guide mechanism comprises an arc-shaped guide portion and a second guided portion slidingly arranged along the arc-shaped guide portion, one of the arc-shaped guide portion and the second guided portion is arranged on the base and the other is arranged on the lens barrel.

[0017] In an optional embodiment of the present application, the circumferential guide mechanism is configured to limit the lens to reciprocally rotate relative to the base within a preset angle range.

[0018] In an optional embodiment of the present application, the base comprises a circular plate-shaped body, the arc-shaped guide portion comprises an arc-shaped notch portion arranged on a circumferential surface of the plate-shaped body, the lens barrel abuts one side of the plate-shaped body, the second guided portion comprises a clasp extending from the lens barrel to the other side of the plate-shaped body, the clasp is accommodated in the arc-shaped notch portion, one end of the clasp away from the lens barrel is provided with a clamping pawl protruding towards the center of the plate-shaped body, and the clamping pawl abuts the side of the plate-shaped body away from the lens barrel.

[0019] In an optional embodiment of the present application, the arc-shaped notch part and the buckle are arranged at multiple positions along the circumference of the base and the lens barrel respectively.

[0020] In an optional embodiment of the present application, a plane-shaped protective lens is arranged on the side of the fixed lens away from the movable lens, and the protective lens is mounted on the lens barrel.

[0021] In an optional embodiment of the present application, a heat dissipation plate is arranged on the side of the display screen away from the movable lens, the heat dissipation plate is mounted on the base, and the heat dissipation plate is in heat conduction connection with the display screen.

[0022] In an optional embodiment of the present application, the movable lens is a convex lens, a sunken platform for accommodating the edge area of the movable lens is arranged on the floating seat, an inclined surface is arranged on the step surface of the sunken platform opposite to the convex surface of the movable lens, and a gap for filling structural glue is arranged between the inclined surface and the edge area of the convex surface of the movable lens.

[0023] In an optional embodiment of the present application, an axial guide mechanism for guiding the floating seat to move along the preset direction is arranged between the floating seat and the base, and the projection of the axial guide mechanism on the preset direction is located in the projection area of the sunken platform on the preset direction.

[0024] To achieve the above object and other related objects, the present application further provides a wearable device, which comprises:

[0025] a frame configured to be worn on the face of a human body; and

[0026] the optical machine is mounted on the frame, and the optical machine is assembled to:

[0027] in response to the state that the frame is worn on the face of the human body, the optical machine is located in front of the human eye.

[0028] The technical effect of the present application is that: the present application directly connects the lens barrel and the base by rotation, discards the traditional external rotating sleeve, and instead adopts an internal linkage mechanism to convert the rotating motion of the lens barrel into the precise axial linear motion of the floating seat, so that the mechanical structure for driving the movement of the moving lens is highly integrated between the lens barrel and the floating seat, rather than being superimposed externally, thereby eliminating redundant space from the root; the linkage mechanism couples the circumferential rotation into the transmission mode of axial displacement, realizes the internalization and coaxiality of the driving function, so that the change of the lens spacing does not need to rely on additional radial and axial stacking structure, and since there is no external sleeve and the transmission mechanism does not increase the length, the radial and axial dimensions of the optical lens are significantly reduced, and finally the miniaturization and compactness of the overall structure of the optical system are achieved, perfectly meeting the stringent requirements of smart wearable devices for extreme volume and light and thin wearing experience, and meeting the comfort requirements of virtual reality devices for long-term wearing. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 is a perspective view of one of the views of the optical machine provided by the embodiment of the present application;

[0030] Figure 2 is a perspective view of another view of the optical machine provided by the embodiment of the present application;

[0031] Figure 3 is a front view of the optical machine provided by the embodiment of the present application;

[0032] Figure 4 is Figure 3 A-A sectional view of

[0033] Figure 5 is Figure 4 I partial enlarged view of

[0034] Figure 6 is an exploded view of the optical machine provided by the embodiment of the present application;

[0035] Figure 7 is an exploded view of the linkage mechanism provided by the embodiment of the present application;

[0036] Figure 8 is an exploded view of the axial guide mechanism provided by the embodiment of the present application;

[0037] Figure 9 is an exploded view of the axial guide mechanism provided by the embodiment of the present application;

[0038] 10, fixed lens; 20, intermediate lens; 30, moving lens; 40, display screen; 50, base; 51, guide post; 52, arc-shaped notch part; 60, lens barrel; 61, helical guide part; 62, buckle; 621, clamping jaw; 70, floating seat; 71, first guided part; 72, guide hole; 73, counterbore; 731, gap; 80, protective lens; 90, heat sink. DETAILED DESCRIPTION

[0039] Other advantages and effects of the present application can be easily understood by those skilled in the art from the description of the embodiments of the present application. The present application can also be implemented or applied in other different embodiments, and various modifications or changes can be made to the details in the description based on different views and applications without departing from the spirit of the present application. It should be noted that the embodiments and features in the embodiments can be combined with each other without conflict.

[0040] It should be noted that the drawings provided in the following embodiments only schematically illustrate the basic concept of the present application, and only the components related to the present application are shown in the drawings, not the number, shape and size of the components when actually implemented. The actual implementation of each component may be a random change, and the component layout pattern may be more complex.

[0041] Please refer to Figures 1-9 The embodiments of the present application provide an optical engine including a fixed lens 10, an intermediate lens 20, a moving lens 30, a display screen 40, a base 50, a lens barrel 60 and a floating seat 70. In specific embodiments, the fixed lens 10 and the moving lens 30 may, for example, be convex lenses, and the intermediate lens 20 may, for example, be a concave lens. Here, the lens arrangement is a commonly used pancake scheme for optical engines, in which the intermediate lens mainly functions to correct chromatic aberration and may not be used in some pancake scheme designs. The fixed lens 10, the intermediate lens 20, the moving lens 30 and the display screen 40 are sequentially arranged along a predetermined direction. The base 50 is used to mount the display screen 40. The lens barrel 60 is used to mount the fixed lens 10 and the intermediate lens 20, and the lens barrel 60 is rotationally connected to the base 50 about an axis parallel to the predetermined direction. The floating seat 70 is used to mount the moving lens 30, and the floating seat 70 is accommodated in the lens barrel 60 and movably connected to the base 50 along the predetermined direction. A linkage mechanism is provided between the lens barrel 60 and the floating seat 70, and the linkage mechanism is configured to drive the floating seat 70 to reciprocate along the predetermined direction when the lens barrel 60 rotates relative to the base 50.

[0042] The application directly connects the lens barrel 60 and the base 50 through rotation, discards the traditional external rotating sleeve, and instead adopts an internal linkage mechanism to convert the rotating movement of the lens barrel 60 into the precise axial linear movement of the floating seat 70, so that the mechanical structure for driving the movement of the moving lens 30 is highly integrated between the lens barrel 60 and the floating seat 70, rather than being superimposed externally, thereby eliminating redundant space from the root; the linkage mechanism couples the circumferential rotation into the transmission mode of axial displacement, realizes the internalization and coaxiality of the driving function, so that the change of the lens spacing does not need to rely on additional radial and axial stacking structure, and the design significantly reduces the radial and axial dimensions of the optical lens due to the absence of external sleeve and the transmission mechanism without additional length, and finally achieves the miniaturization and compactness of the overall structure of the optical system, which perfectly meets the stringent requirements of smart wearable devices for extreme volume and light and thin wearing experience.

[0043] Please refer to Figure 3 , 4 As shown in the drawings, in an optional embodiment of the application, 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 completely limits the projection of the linkage mechanism in the preset direction within the projection area of the lens barrel 60, achieving zero overflow design of the transmission components from the spatial layout, which means that all the movement space required by the linkage mechanism is accommodated within the inherent cylindrical space occupied by the lens barrel 60 itself, and through extreme space reuse, the need to increase the radial or axial size of the lens barrel 60 due to the additional transmission mechanism is completely avoided. Therefore, the design eliminates the volume bulging problem caused by the driving assembly surrounding or protruding from the lens barrel 60 in the traditional structure, so that the radial size of the entire optical lens can reach the theoretical minimum value, that is, directly determined by the diameter of the lens barrel 60 and the lens, thereby greatly promoting the integration and miniaturization level of the optical lens in the limited installation space of smart wearable devices.

[0044] Please refer to Figure 7As shown in the optional embodiment of the present application, the linkage mechanism comprises a spiral guide portion 61 and a first guided portion 71 slidingly arranged along the spiral guide portion 61, one of the spiral guide portion 61 and the first guided portion 71 is arranged on the lens barrel 60, and the other is arranged on the floating seat 70. This embodiment efficiently, accurately and smoothly converts the rotary motion of the lens barrel 60 into the axial linear displacement of the floating seat 70 by adopting the spiral transmission mechanism composed of the spiral guide portion 61 and the first guided portion 71; the continuous inclined surface structure inherent in the spiral line can decompose the circumferential rotary force into the axial pushing force without impact, thereby realizing the linear conversion between rotation and translation. This design not only ensures smooth and non-stuck focusing process, improves the reliability and user experience of the system, but more importantly, this integrated and self-contained transmission mode does not need to introduce complex components such as gears or connecting rods, and the structure is extremely compact, realizing the space zero overflow effect in the simplest way, further realizing the miniaturization design of the lens, while ensuring the focusing accuracy and stability of the motion.

[0045] Please refer to Figure 7 As shown in the optional embodiment of the present application, the spiral guide portion 61 comprises a spiral groove, and the first guided portion 71 comprises a guide pin partially accommodated in the spiral groove and slidingly matched with the spiral groove. This embodiment realizes a compact, efficient and reliable power transmission path from the specific structure by specifically realizing the spiral guide portion 61 as a spiral groove and the first guided portion 71 as a guide pin slidingly matched with the spiral groove; the spiral groove provides accurate and solid three-dimensional spatial trajectory constraints for the movement of the guide pin, and its groove structure can not only reliably capture and guide the guide pin to seamlessly convert rotation into axial motion, but more importantly, it completely limits the entire transmission process within the internal space of the wall thickness of the lens barrel 60. This embedded design avoids additional structures such as 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 realizing zero additional space occupation power transmission. This design ensures accurate and smooth focusing action while maximizing the space utilization rate of the mechanical structure.

[0046] Please refer to Figure 4 , 5In an optional embodiment of the present application, as shown in FIGS. 1, 2, 3, 4, 5, 6, 7 and 8, an axial guiding mechanism is arranged between the floating seat 70 and the base 50 for guiding the floating seat 70 to move in the preset direction, and a projection of the axial guiding mechanism in the preset direction is located within a projection area of the lens barrel 60 in the preset direction. This embodiment provides a highly integrated solution for solving the stability and precision of the floating seat 70 in reciprocating motion by adding an axial guiding mechanism completely embedded in the projection area of the lens barrel 60. The guiding mechanism is not independent of the main structure, but ingeniously uses 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 the radial deviation or deflection of the floating seat 70. This design significantly improves the linear precision and motion stability of the lens movement during focusing without increasing the overall radial size of the system, and ensures the alignment consistency of the optical axis and the imaging quality.

[0047] Referring to Figure 4 , 5 , 8, in an optional embodiment of the present application, the axial guiding mechanism includes a guide column 51 and a guide hole 72 in sliding cooperation with the guide column 51, one of the guide column 51 and the guide hole 72 is arranged on the base 50, and the other is arranged on the floating seat 70. This embodiment seamlessly integrates the high-precision linear guiding function into the existing structure space by adopting the sliding pair composed of the guide column 51 and the guide hole 72 as the specific implementation of the axial guiding mechanism. The guide column 51 and the guide hole 72 provide stable and low-friction linear motion constraint with simple cylindrical fitting surfaces, ensuring the coaxiality of the movement track of the floating seat 70 and the optical axis. This design effectively eliminates the risk of radial shaking and tilting of the floating seat 70 in reciprocating motion, and guarantees the centering precision of the lens assembly and the imaging stability. In addition, the radial size of this guiding structure is relatively small, which can be easily accommodated within the projection range of the lens barrel 60.

[0048] Referring to Figure 9As shown, in an optional embodiment of the present invention, 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.

[0049] Please see Figure 9 As shown, in an optional embodiment of the present invention, 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 rotational 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.

[0050] Please see Figure 9As shown, in an optional embodiment of the present application, the circumferential guide mechanism is configured to limit the reciprocal rotation of the lens barrel 60 within a preset angle range relative to the base 50. This embodiment sets a safe physical stroke limit for the entire focusing system by configuring the circumferential guide mechanism to limit the rotation of the lens barrel 60 within a preset angle range; the rotational angle of the lens barrel 60 is linearly related to the axial displacement of the floating seat 70 through the screw transmission mechanism, so limiting the rotational angle of the lens barrel 60 is directly equivalent to limiting the axial movement range of the floating seat 70 and the moving lens 30 mounted thereon. By limiting the length of the arc-shaped guide portion, this design effectively prevents the moving lens 30 from moving beyond the range due to excessive rotation of the lens barrel 60 by the user, avoiding the risk of the lens colliding with the base 50, the display screen 40 or other internal components, thereby ensuring the safety of the optical components and the durability of the entire mechanism.

[0051] As shown, Figure 9 As shown, in an optional embodiment of the present application, the base 50 includes a circular plate-shaped body, and the arc-shaped guide portion includes an arc-shaped notch portion 52 provided on the peripheral surface of the plate-shaped body; the lens barrel 60 abuts 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 portion 52, and the end of the buckle 62 away from the lens barrel 60 is provided with a pawl 621 protruding towards the center of the plate-shaped body, and the pawl 621 abuts the side of the plate-shaped body away from the lens barrel 60. This embodiment realizes an extremely compact and simple assembly of circumferential limiting and axial fixing integration scheme by materializing the arc-shaped guide portion as an arc-shaped notch on the peripheral surface of the base 50 and designing the second guided portion as a buckle 62 structure with a pawl 621; the buckle 62 is arranged in a way that it can use the notch sidewall as an arc-shaped guide rail to limit the rotational angle of the lens barrel 60, and the pawl 621 at the end can be hooked on the back of the base 50 to form axial locking, firmly restraining the lens barrel 60 on the base 50 without falling off. This design simultaneously solves the two key requirements of rotational guide and axial fixation by using only the buckle 62, maximally simplifies the structure, reduces the number of parts, and avoids the space occupied by additional screws or retaining rings and other fixing parts, so that the entire lens module further compresses the axial dimension while obtaining reliable rotational limiting and axial retaining functions.

[0052] As shown, Figure 9As shown, in an optional embodiment of the present invention, multiple arc-shaped notches 52 and latches 62 are respectively spaced apart along the circumference of the base 50 and the lens barrel 60. This embodiment, by arranging multiple arc-shaped notches 52 and latches 62 spaced apart circumferentially, 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 latches 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.

[0053] Please see Figure 1 , 3 As shown in Figures 4 and 6, in an optional embodiment of the present invention, 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 mounted on the lens barrel 60. This embodiment provides front-end physical protection for the entire optical system by adding a planar protective lens 80 mounted on the lens barrel 60 at 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.

[0054] Please see Figure 2 , 4As shown in Figures 6 and 7, in an optional embodiment of the present invention, 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. 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.

[0055] Please see Figure 4 , 5 As 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 receiving 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.

[0056] Please see Figure 4 , 5In an optional embodiment of the present application, as shown in FIG. 8, the projection of the axial guiding mechanism in the preset direction is located within the projection area of the sink 73 in the preset direction. This embodiment achieves high multiplexing of the mechanical guiding structure and the optical assembly installation space by completely disposing the projection of the axial guiding mechanism within the projection area of the sink 73; the sink 73 structure on the floating seat 70 that must exist to accommodate the moving lens 30 is used as the arrangement area of the guiding mechanism, so that the guiding function does not need to occupy new space, which completely eliminates the risk of increasing the radial or axial size of the floating seat 70 due to the addition of the guiding mechanism at the physical level, not only ensures the precision and stability of the lens focusing movement, but also minimizes the volume of the entire floating seat 70 component under the premise of meeting all functions.

[0057] The present application also provides a wearable device, which comprises a frame and the optical machine; the frame is configured to be wearable on the human face; the optical machine is installed on the frame, and the optical machine is assembled to be located in front of the human eye in response to the state that the frame is worn on the human face. In specific embodiments, the wearable device may, for example, be a virtual reality glasses, especially a virtual reality glasses that needs to be worn for a long time, such as a virtual reality glasses used to replace myopia glasses or reading glasses. This application embodiment directly meets the comfort requirement of long-term wearing of virtual reality devices by integrating the extremely miniaturized and light-weight optical machine into the wearable frame and positioning it in front of the human eye. The various innovations of the aforementioned optical machine collectively contribute to the significant reduction of its radial and axial dimensions, which enables the overall volume and weight of the final wearable device to be greatly reduced, completely avoiding the compression and encumbrance caused by the bulky lens of traditional devices. This device can achieve powerful virtual reality visual function in the form of ordinary glasses, greatly reducing the burden on the user's face, especially the nose bridge, eliminating physical fatigue and psychological resistance caused by long-term wearing, and thus truly adapting to the daily and all-weather use scenarios of replacing traditional myopia glasses or reading glasses.

[0058] In summary, the application directly connects the lens barrel 60 and the base 50 by rotation, and abandons the traditional external rotating sleeve, instead adopts an internal linkage mechanism to convert the rotating movement of the lens barrel 60 into the precise axial linear movement of the floating seat 70, so that the mechanical structure driving the movement of the moving lens 30 is highly integrated between the lens barrel 60 and the floating seat 70, rather than superimposed externally, thereby eliminating redundant space from the root; the linkage mechanism couples the circumferential rotation into the transmission mode of axial displacement, realizes the internalization and coaxiality of the driving function, so that the change of the lens spacing does not need to rely on additional radial and axial stacking structure, this design significantly reduces the radial and axial dimensions of the optical lens due to the absence of external sleeve and the transmission mechanism without additional length, finally achieves the miniaturization and compactness of the overall structure of the optical system, perfectly fits the stringent requirements of smart wearable devices for extreme volume and light and thin wearing experience, and meets the comfort demand of long-term wearing of virtual reality devices.

[0059] The above embodiments only exemplarily illustrate the principles and effects of the present application, and are not used to limit the present application. Any person skilled in the art can modify or change the above embodiments without departing from the spirit and scope of the present application. Therefore, all equivalent modifications or changes completed by those skilled in the art without departing from the spirit and technical thought disclosed by the present application should be covered by the claims of the present application.

[0060] In the description herein, many specific details are provided, such as examples of components and / or methods, to provide a thorough understanding of embodiments of the present application. Those skilled in the relevant arts, however, will recognize that embodiments of the present application can be practiced without one or more of the specific details, or with other devices, systems, assemblies, methods, components, materials, parts, and / or the like. In other instances, well-known structures, materials, or operations are not specifically shown or described in detail in order to avoid obscuring aspects of embodiments of the present application.

Claims

1. An optical engine, characterized by, The application relates to a lens device, comprising: a fixed lens (10), a moving lens (30) and a display screen (40) arranged in sequence along a preset direction; a base (50) for mounting the display screen (40); a lens barrel (60) for mounting the fixed lens (10), the lens barrel (60) being rotationally connected to the base (50) about an axis parallel to the preset direction; a floating seat (70) for mounting the moving lens (30), the floating seat (70) being movably connected to the base (50) along the preset direction and being accommodated in the lens barrel (60); a linkage mechanism is arranged between the lens barrel (60) and the floating seat (70), and 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). The projection of the linkage mechanism in the preset direction is located in the projection area of the lens barrel (60) in the preset direction.

2. The optical engine of claim 1, wherein The linkage mechanism comprises a spiral guide part (61) and a first guided part (71) arranged to slide along the spiral guide part (61), one of the spiral guide part (61) and the first guided part (71) is arranged on the lens barrel (60), and the other is arranged on the floating seat (70).

3. The optical engine of claim 2, wherein, The spiral guide part (61) comprises a spiral groove, and the first guided part (71) comprises a guide pin partially accommodated in the spiral groove and slidingly matched with the spiral groove.

4. The optical engine of claim 3, wherein An axial guide mechanism is arranged between the floating seat (70) and the base (50) to guide the floating seat (70) to move along the preset direction, and the projection of the axial guide mechanism in the preset direction is located in the projection area of the lens barrel (60) in the preset direction.

5. The optical engine of claim 1, wherein The axial guide mechanism comprises a guide column (51) and a guide hole (72) slidingly matched with the guide column (51), one of the guide column (51) and the guide hole (72) is arranged on the base (50), and the other is arranged on the floating seat (70).

6. The optical engine of claim 5, wherein, A circumferential guide mechanism is arranged 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, and the projection of the circumferential guide mechanism in the preset direction is located in the projection area of the lens barrel (60) in the preset direction.

7. The optical engine of claim 1, wherein The circumferential guide mechanism comprises an arc-shaped guide part and a second guided part arranged to slide along the arc-shaped guide part, one of the arc-shaped guide part and the second guided part is arranged on the base (50), and the other is arranged on the lens barrel (60).

8. The optical engine of claim 7, wherein, The circumferential guide mechanism is configured to limit the lens to reciprocate relative to the base (50) within a preset angle range.

9. The optical engine of claim 8, wherein, ​ 10. The optical engine of claim 9, wherein, The base (50) comprises a circular plate-shaped body, the arc-shaped guiding part comprises an arc-shaped notch part (52) arranged on the circumferential surface of the plate-shaped body; the lens barrel (60) abuts one side of the plate-shaped body, the second guided part comprises 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 part (52), and one end of the buckle (62) away from the lens barrel (60) is provided with a pawl (621) protruding towards the center of the plate-shaped body, and the pawl (621) abuts the side of the plate-shaped body away from the lens barrel (60).

11. The optical engine of claim 10, wherein, The arc-shaped notch part (52) and the buckle (62) are respectively arranged in multiple along the circumferential direction of the base (50) and the lens barrel (60).

12. The optical engine of claim 1, wherein, The side of the fixed lens (10) away from the mobile lens (30) is provided with a planar protective lens (80), and the protective lens (80) is mounted on the lens barrel (60).

13. The optical engine of claim 1, wherein, The side of the display screen (40) away from the mobile lens (30) is provided with a heat dissipation plate (90), the heat dissipation plate (90) is mounted on the base (50), and the heat dissipation plate (90) is in thermal conductive connection with the display screen (40).

14. The optical engine of claim 1, wherein, The mobile lens (30) is a convex lens, the floating seat (70) is provided with a sink (73) for accommodating the edge region of the mobile lens (30), the step surface of the sink (73) opposite to the convex surface of the mobile lens (30) is provided with an inclined surface, and a gap (731) for filling structural glue is arranged between the inclined surface and the edge region of the convex surface of the mobile lens (30).

15. The optical engine of claim 14, wherein, An axial guiding mechanism for guiding the floating seat (70) to move along the preset direction is arranged between the floating seat (70) and the base (50), and the projection of the axial guiding mechanism in the preset direction is located in the projection area of the sink (73) in the preset direction.

16. A wearable device, comprising: Comprise: A frame configured to be wearable on a human face; And The optical machine of any one of claims 1 to 15 is installed on the frame, and the optical machine is assembled to: In response to the state that the frame is worn on the human face, the optical machine is located in front of the human eye.

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