Continuously variable zoom spectacles

Abstract

A continuously zoomable glasses system includes a body, temples, and nose pads. The temples are connected to the body. The body houses a transmission mechanism, a control module, and a guide device and / or auxiliary guide device to restrict lens movement. A distance sensor is located on the front of the body. The body also contains a wearing sensor and a three-axis accelerometer. All three sensors are electrically connected to the control module, which is in turn electrically connected to a drive unit. This allows for real-time monitoring of the continuously zoomable glasses' usage status and control of the transmission mechanism. The continuously zoomable glasses offer high stability and movement precision during lens movement, resulting in greater comfort and facilitating visual training for those experiencing visual impairment due to accommodative factors.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of glasses, in particular to a continuous zoom glasses. BACKGROUND

[0002] At present, the myopia population is increasing, and more and more teenagers have myopia problems. The main reason for myopia is excessive near vision, changing the improper use of eyes and relieving visual fatigue, and restoring the self-regulation function of the eyeball, which is an effective method to improve myopia. In addition, the training of visual acuity through auxiliary equipment is also an effective means for rapid correction of pseudomyopia. Therefore, in recent years, more and more devices for improving visual acuity have been developed.

[0003] The device commonly used for visual training takes "intelligent zoom visual training" as the core, takes the Internet, Internet of Things, and big data services as support, and takes dynamic eye adjustment training and visual perception training as the basis. The product is an ophthalmic technology product in the field of myopia prevention and control. Through scientific and reasonable adjustment function training and dynamic visual perception training, the product realizes effective prevention and control of myopia.

[0004] In the "intelligent zoom visual training" system, the left eye and the right eye correspond to a lens group respectively, and each lens group is composed of two zoom lenses that overlap and can move relative to each other. This relative movement can be up and down or left and right. The double face of each zoom lens is a free-form surface, and the two faces of some lenses are a plane and a free-form surface respectively.

[0005] The intelligent zoom performance includes a free-form surface linear zoom lens group and a digital control system. The free-form surface linear zoom lens group is composed of two left and right connected lenses, and the left and right eyes of each connected lens are designed with the same geometric function free-form surface. The two connected left and right lens groups are combined into a lens group. During the horizontal movement of the lens group, the linear zoom performance of the device can be realized in the central overlapping area. The digital control system is composed of a single-chip microcomputer, a network communication module, an APP interactive application module, and a mechanical transmission mechanism, which can realize the horizontal movement of the digital mechanical transmission system according to the requirements of the set program. The movement parameters include step distance, speed, and round-trip cycle, as well as the focal point switching system in the running progressive process. At the same time, all running data and motion trajectories can be uploaded to the cloud database through the APP interactive system, and the corresponding feedback mechanism is formed to adjust the running state matched with the current visual ability of the user in time.

[0006] The free surface of the zoom lens includes a P point, a C region, an N point, and an A region, wherein the P point is an optical center point corresponding to the maximum positive degree, i.e., a position corresponding to the highest point of the free surface; the N point is an optical center point corresponding to the maximum negative degree, i.e., a position corresponding to the lowest point of the free surface. The C region is a continuous zoom channel, which is a transition region from the maximum positive degree of the P point to the maximum negative degree of the N point, i.e., a transition region of a line between the highest point and the lowest point. The A region is a peripheral aberration region, i.e., a region outside the highest point, the lowest point, and the transition region between the highest point and the lowest point of the lens.

[0007] A lens group provided by a Chinese patent (2015202467920 A kind of arbitrary zoom lens group) includes a horizontal surface on one surface of each lens, and a non-horizontal curved surface on the other surface of each lens, wherein the non-horizontal curved surface of each lens has a highest point and a lowest point; a plurality of optical centers with continuously varying refractive powers are uniformly distributed between the highest point and the lowest point of the non-horizontal curved surface of each lens along the non-horizontal curved surface; and the refractive powers of the plurality of optical centers decrease or increase successively.

[0008] A Chinese patent (2018104826466 A kind of mirror image designed double-face zoom lens combination device and combination method) discloses a mirror image designed double-face zoom lens combination device and combination method, wherein the device includes two groups of double-face zoom lenses, each group of double-face zoom lenses includes two double-face zoom lenses, and each double-face zoom lens includes two symmetric mirror image designed zoom curved surfaces; and the combination method combines the two groups of double-face zoom lenses and drives them by a motor.

[0009] A Chinese patent (2021100687112 A kind of zoom driving device of intelligent glasses and intelligent glasses) discloses a zoom driving device of intelligent glasses and intelligent glasses, which includes a transmission box body, a transmission module, and a lens mounting assembly; the transmission module is installed in transmission connection with the lens mounting assembly and is installed together in the transmission box body; the lens mounting assembly includes a sliding table and a lens mounting table; the sliding table is installed on a lead screw driving assembly; the lens mounting table is detachably arranged on a bottom sliding groove of the transmission box body and can slide along the sliding groove; the bottom of the sliding table is connected to the top of the lens mounting table through a clamping piece; the transmission module drives the sliding table to slide and in turn drives the lens mounting table to slide, so as to change the overlapping degree of two groups of lenses mounted on the lens mounting table and realize the zoom of the glasses.

[0010] The existing zoom glasses can be improved in the following aspects:

[0011] 1. The existing zoom glasses can realize zooming, but the general lenses are multifocal lenses, cannot continuously zoom, and produce image jumping phenomenon in the edge area of a certain focal point during the cross movement of the front and rear lenses, and when the refractive power of the lenses is different in different areas, the human eye cannot tolerate it, and presents a large optical aberration, such as distortion and field curvature.

[0012] 2. The existing zoom glasses generally need to manually control the transmission mechanism, and the automation degree is not high; the transmission stability and transmission precision of the motor-driven transmission mechanism are difficult to meet the requirements of precise transmission, thereby affecting the stability and movement precision of the lens movement process and affecting the visual recovery training.

[0013] 3. The user needs different degrees when looking at distant and near scenes, and the existing zoom glasses cannot adjust the degree change range of the intelligent zoom glasses according to the distance between the target and the eyes of the user, resulting in poor training effect, and thus needs to be improved. SUMMARY

[0014] The technical problem to be solved by the present application is that the lenses of the existing zoom glasses cannot continuously zoom, the transmission stability and transmission precision of the transmission mechanism are difficult to meet the requirements of precise transmission, thereby affecting the stability and movement precision of the lens movement process and affecting the visual recovery training.

[0015] To solve the above technical problems, the present application provides a continuously zoomable glasses, the lens is a continuously zoomable lens, the stability and movement precision of the slider in the movement process are high, the stability and movement precision of the two lenses during movement are high, and the use is more comfortable, which is beneficial to the visual recovery training.

[0016] The technical scheme adopted by the present application to solve the above technical problems is: a continuously zoomable glasses, comprising a machine body, a transmission mechanism, a control module, left and right two lens legs and a nose pad, the left and right two lens legs are connected with the machine body;

[0017] The control module is arranged in the machine body, a distance sensor is arranged on the front side of the machine body, a wearing sensor and a three-axis acceleration sensor are further arranged in the machine body, the distance sensor, the wearing sensor and the three-axis acceleration sensor are electrically connected with the control module, and the control module is electrically connected with a driving piece to realize real-time monitoring of the use state of the continuously zoomable glasses and control of the transmission mechanism.

[0018] The circuit board is mounted on the machine body, two limit switches are arranged on the circuit board, the two limit switches are respectively located at the front and rear limit positions of the movement of one of the sliders, and the two limit switches are electrically connected with the control module.

[0019] The machine body is provided with at least one lens group, each lens group comprising two front and rear lenses arranged in superposition and capable of cross movement, the lenses are single-sided free curved surface continuous zoom lenses, one side of each lens is a plane and the other side is a free curved surface; the free curved surface continuous zoom lens is generated by using an internal B-spline surface fitting mathematical model, and the surface refractive power of the lens continuous zoom channel continuously changes;

[0020] The control module drives the front and rear lenses of the lens group to cross move at the same speed and in opposite directions through the transmission mechanism to realize zooming.

[0021] The machine body is provided with an installation cavity, and the transmission mechanism is arranged in the installation cavity.

[0022] The machine body is provided with a housing for installing the transmission mechanism, the housing comprises an upper housing and a lower housing, and an installation cavity is formed in the interiors of the upper housing and the lower housing, the transmission mechanism is arranged in the installation cavity, and the two lenses are in transmission connection with the transmission mechanism; the transmission mechanism comprises a driving member and a transmission member, the transmission member comprises two lead screws, and the driving member and the transmission member are in gear engagement transmission; the two lead screws are each provided with a sliding block in threaded connection therewith, the sliding block comprises a sliding block body and a lens mounting seat, and the two lenses are connected with the two lens mounting seats respectively.

[0023] The two lead screws and the driving member are in transmission connection through gears, the transmission precision is high, the stability of the sliding block movement is good, and in the process that the movement of the sliding block drives the movement of the two lenses, the stability and movement precision of the lenses are also higher, so that the comfort is higher when the glasses are used, and the visual recovery training is facilitated.

[0024] Further, the threads of the two lead screws are opposite in rotation direction, so that the two sliding blocks move at the same speed and in opposite directions under the driving action of the driving member, and drive the front and rear lenses to move at the same speed and in opposite directions.

[0025] Further, the installation cavity is provided with a guide device and / or an auxiliary guide device for limiting the movement of the lenses, the guide device and / or the auxiliary guide device are arranged in parallel with the lead screws, and the guide device and / or the auxiliary guide device are in sliding connection with the two sliding blocks.

[0026] Further, the guide device comprises two guide shafts arranged in parallel with the lead screws, and the two guide shafts are in sliding connection with the two lead screws respectively.

[0027] Further, the auxiliary guide device comprises two guide strips arranged in parallel with the lead screws, the sliding block is provided with a sliding groove matched with the guide strips, and the sliding block is in sliding cooperation with the guide strips.

[0028] In some embodiments, the guiding device does not have a guiding shaft, the side of the lower shell is provided with guiding plates, the guiding device comprises sliding blocks arranged on the two sides of the slider body and the guiding plates on the side of the lower shell, the screw is parallel to the guiding plates, the guiding plates are arranged corresponding to the sliding blocks, the sliding blocks are tightly adjacent to the guiding plates and are slidable in the axial direction of the screw to guide the slider.

[0029] Further, in some embodiments, the left and right sides of the slider body are both provided with slots, the sliding block comprises an insert piece, the insert piece is formed as an elastic plate, a boss is fixed on one surface of the insert piece close to the guiding plate, the insert piece is inserted into the slot, and the boss is tightly adjacent to the guiding plate and is slidable in the axial direction of the screw.

[0030] Further, in some embodiments, the left and right sides of the slider body are both provided with roller mounting cavities, the sliding block is a roller, the roller is mounted in the roller mounting cavity of the slider body, the roller is rotatably connected with the slider body in the roller mounting cavity, and the rolling surface of the roller is tightly adjacent to the guiding plate and is rollable in the axial direction of the screw.

[0031] Further, the slider and the lens are connected by two magnetic pieces.

[0032] Further, the lens is fixedly connected with a magnet, another magnet is mounted on the slider, the lens mounting seat is provided with an assembly slot of assembly magnetic material on the slider, and the lens mounting seat and the lens are connected by magnetic attraction.

[0033] Further, the machine body is provided with a control module, a distance sensor is arranged on the front side of the machine body, a wearing sensor is arranged on the rear side of the machine body, a three-axis acceleration sensor is further arranged in the machine body, the distance sensor, the wearing sensor and the three-axis acceleration sensor are electrically connected with the control module, and the control module is electrically connected with the driving piece to monitor the use state of the continuous zoom glasses and control the transmission mechanism.

[0034] Further, a circuit board is mounted on the machine body, and two limit switches are arranged on the circuit board, the two limit switches are respectively located at the front and rear limit positions of the movement of one of the sliders, and the two limit switches are electrically connected with the control module.

[0035] Further, the lens group comprises two front and rear left and right connected lenses, and the left and right eyes of each connected lens have the same geometric function design of free curved surface.

[0036] Further, the front lens and the rear lens are both single-sided zoom lenses, one side of each lens is a plane, and the other side is a free curved surface.

[0037] The continuously zoomable glasses of the present invention have the following beneficial effects:

[0038] 1. Since the lenses of Benke Continuous Zoom Glasses are all single-sided freeform continuous zoom lenses, when the lens is moved to any fixed position, the refractive power of the lens from the optical center point of the lens to the zoom channel is equal in both the horizontal and vertical directions. There is no change in refractive power in the pupil area, image jump, or zero refractive power in the vertical direction.

[0039] 2. Through the cooperation of the control module, wearing sensor, distance sensor and triaxial accelerometer, the control module can control the transmission mechanism to automatically adjust the position of the front and rear lenses, making it more convenient to use; at the same time, it can monitor the usage status of the continuous zoom glasses in real time and automatically adjust and control the operation mode of the transmission mechanism to enhance the effect of vision training.

[0040] 3. The drive component is connected to the two lead screws by gear transmission. During installation, it is only necessary to mesh the drive gear and the driven gear. The transmission stability and accuracy are high, and the installation and disassembly are convenient. This is beneficial for equipment maintenance and parts replacement, saves installation and disassembly time, and has a simple structure and low cost.

[0041] 4. Two limit switches are set on the circuit board. The initial position of the two sliders is located in the middle of the two lead screws. The two sliders move simultaneously in opposite directions. When the sliders move to the limit position, that is, at the two limit switches, the control module stops moving or controls the drive to reverse. Compared with the limit of some mechanical structures, the limit accuracy is high, the limit stability is good, and the cost is low.

[0042] 5. The lens and slider are connected by magnetic attraction, which is convenient and detachable, facilitating the assembly, maintenance and replacement of the equipment.

[0043] 6. The slider is guided simultaneously on both the upper and lower sides of the lead screw by the guide shaft and guide bar, which improves the stability and accuracy of the slider movement, avoids slight shaking of the slider in the machine body, further improves the stability of the slider movement, and thus further improves the stability of the lens movement and improves the user's comfort. Attached Figure Description

[0044] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0045] Figure 1 This is a schematic diagram of the overall structure of the continuously zoomable glasses of the present invention.

[0046] Figure 2 This is a schematic diagram of the structure of the body and lens mounting base of the continuously zoomable glasses of the present invention.

[0047] Figure 3 This is a schematic diagram of the transmission mechanism of the present invention.

[0048] Figure 4 This is an assembly diagram of the transmission mechanism of the present invention.

[0049] Figure 5 This is a schematic diagram of the front and rear lenses of the present invention.

[0050] Figure 6 This is a distribution diagram of the lens area in this invention.

[0051] Figure 7 This is a schematic diagram of the slider assembly in Embodiment 2 of the present invention.

[0052] Figure 8 This is a side view of the slider assembly of Embodiment 2 of the present invention.

[0053] Figure 9 This is a schematic diagram of the lower shell structure in Embodiment 2 of the present invention.

[0054] Figure 10 This is a schematic diagram of the slider body in Embodiment 3 of the present invention.

[0055] Figure 11 yes Figure 8 Enlarged view of point A in the middle.

[0056] Figure 12 This is a schematic diagram of the slider body in Embodiment 4 of the present invention.

[0057] In the diagram: 1. Body; 2. Temple; 3. Nose pad; 4. Front lens; 5. Rear lens; 6. Distance sensor; 7. Wear sensor; 8. Upper shell; 9. Lower shell; 10. Motor; 11. First lead screw; 12. Second lead screw; 13. First slider; 14. Second slider; 15. First gear; 16. Second gear; 17. Third gear; 18. Circuit board; 19. Limit switch; 20. First magnet; 21. Second magnet; 22. Third magnet; 23. ... Four magnets; 24. First guide shaft; 25. First guide strip; 26. Second guide shaft; 27. Second guide strip; 28. First guide groove; 29. ​​Second guide groove; 30. Sliding block; 301. Connector; 302. Boss; 31. Left side plate; 32. Right side plate; 33. Middle side plate; 34. Guide plate; 35. Slider body; 36. Lens mounting base; 37. Slot; 371. Groove; 372. Clearance surface; 38. Roller mounting cavity; 39. Roller. Detailed Implementation

[0058] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0059] In the description of this invention, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing the 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, and therefore should not be construed as a limitation of the invention. Furthermore, features defined as "first" or "second" may explicitly or implicitly include one or more of those features. In the description of this invention, unless otherwise stated, "a plurality of" means two or more. In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "connected," and "linked" 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. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0060] (Example 1)

[0061] like Figures 1 to 6 The diagram illustrates the preferred embodiment of the present invention: a continuously zoomable glasses system comprising a body 1, two temples 2, and a nose pad 3. The nose pad 3 is detachably mounted on the side of the body 1 closest to the human body and in the center of the body 1. Both temples 2 are elastically hinged to the sides of the body 1. A lens assembly is also mounted on the body 1, comprising two conjoined lenses for each eye. The left and right eyes of each conjoined lens can be freeform surfaces designed using the same geometric function, such as a Zernike polynomial. The two conjoined lenses are a front lens 4 and a rear lens 5, arranged front-to-back with partial overlap and capable of horizontal cross-movement. During this horizontal cross-movement, the lens assembly achieves measurable linear zoom performance in the central overlapping area.

[0062] All lenses are single-sided freeform continuous zoom lenses, with one side of each lens being a flat surface and the other side a freeform surface, such as... Figure 6As shown, a continuous zoom channel is provided on the freeform surface side, and the periphery of the continuous zoom channel is the peripheral aberration zone. In this embodiment, the freeform surface is fitted with a mathematical model based on the refractive power distribution at various points through the single-sided freeform lens. The surface refractive power of the lens's continuous zoom channel changes continuously, making it suitable for fitting with B-spline functions and radial basis functions. Since the B-spline function fitting curve is infinitely differentiable within all nodes, the mathematical expression describing the single-sided freeform lens using the B-spline curve in this embodiment is:

[0063]

[0064] N i，k (u), N j，k (v) represents the weighting functions in the x and y directions of the B-spline surface fitting mathematical model, and d i，j Let m and n represent the control points of the freeform surface. The intervals of u and v are determined by i and j (i ≤ u < i + k, j ≤ v < j + k), and the weight function N... i，k (u), N j，k In (v), i and j represent the nth segment of the function, and k represents the order of the function (k≠1). For example, N i，k If the order of the function is k, then each segment of the function has a polynomial of degree k-1. The B-pattern fringe function can be viewed as a series of control points d. i，j and weight function N i，k (u), N I，k (v) is a linear combination. In short, it involves multiplying each control point by its corresponding weight function and then summing the results. The weight function is pre-designed and depends only on the order k. This function does not change with the number of control points; it controls only the control points d. i，j The quantities, namely m and n.

[0065] The freeform surface model for the set diopter variation was simulated using the B-spline surface fitting mathematical model described above. A single-sided freeform continuous zoom lens was then fabricated using CNC machining via mold casting.

[0066] In this embodiment, except for the freeform surface linear zoom which jumps by 0.25D (±0.25D) at the zero point (due to the characteristics of the B-like fringe function), i.e. it is not differentiable at the zero diopter point, thus causing the diopter jump phenomenon, all other central regions are differentiable, i.e., linear zoom.

[0067] The body 1 has a mounting cavity, and a transmission mechanism is installed in the mounting cavity. The front lens 4 and the rear lens 5 are both connected to the transmission mechanism. The driving component includes a motor 10. Under the drive of the motor 10, the transmission mechanism drives the front lens 4 and the rear lens 5 to move left and right. The front lens 4 and the rear lens 5 move in opposite directions. The front lens 4 and the rear lens 5 are both single-sided zoom lenses. Specifically, the two adjacent surfaces are flat, and the two opposing surfaces are free-form surfaces.

[0068] The body 1 has a housing for installing the transmission mechanism. The housing includes an upper shell 8 and a lower shell 9, and the upper shell 8 and the lower shell 9 form a cavity. The transmission mechanism includes a motor 10 and a transmission component installed in the cavity. A drive gear is provided on the output shaft of the motor 10. The drive gear is a first gear 15. The transmission component includes two lead screws. A driven gear is coaxially connected to the two lead screws. The driven gear meshes with the drive gear. A slider is provided on each of the two lead screws. The slider includes a slider body 35 and a lens mounting seat 36. The lens mounting seat 36 is fixedly connected to the lower part of the slider body 35. The two lenses are respectively connected to the two lens mounting seats 36.

[0069] The two lead screws are a first lead screw 11 and a second lead screw 12. The driven gear at one end of the first lead screw 11 is a second gear 16, which is coaxially and fixedly connected to the first lead screw 11. The first gear 15 meshes with the second gear 16 to achieve the transmission connection between the motor 10 and the first lead screw 11. The driven gear at one end of the second lead screw 12 is a third gear 17, which is coaxially and fixedly connected to the second lead screw 12. The third gear 17 meshes with the first gear 15. A first slider 13 is provided on the first lead screw 11. The first lead screw 11 passes through the first slider 13 and is threadedly connected to the first slider 13. The first slider 13 is connected to the front lens 4. A second slider 14 is provided on the second lead screw 12. The second lead screw 12 passes through the second slider 14 and is threadedly connected to the second slider 14. The second slider 14 is connected to the rear lens 5. The first lead screw 11 and the second lead screw 12 rotate in opposite directions. When the motor 10 drives the first lead screw 11 and the second lead screw 12 to rotate, the first slider 13 and the second slider 14 move in opposite directions.

[0070] A circuit board 18 is installed on the lower shell 9. Two limit switches 19 are provided on the circuit board 18. The two limit switches 19 are located at the two extreme positions before and after the first slider 13. Both limit switches 19 are electrically connected to the control module. The control module is electrically connected to the motor 10.

[0071] The slider and the lens are connected by two magnetic components. The first slider 13 has a first magnet 20 and a first mounting groove for the first magnet 20. The shape of the first magnet 20 matches the first mounting groove; specifically, the first magnet 20 and the first mounting groove are dovetail-shaped for easy assembly and to prevent the first magnet 20 from falling out of the first mounting groove. The front lens 4 has a second magnet 21. The first magnet 20 and the second magnet 21 magnetically attract each other to connect the first slider 13 and the front lens 4. The second slider 14 has a third magnet 22 and a second mounting groove. The shape of the third magnet 22 matches the second mounting groove. The rear lens 5 has a fourth magnet 23. The third magnet 22 and the fourth magnet 23 magnetically attract each other to connect the second slider 14 and the rear lens 5.

[0072] The mounting cavity is also equipped with a guide device and an auxiliary guide device to restrict lens movement. The guide device and auxiliary guide device are respectively located on both sides of the lead screw. The guide device includes two guide shafts: a first guide shaft 24 and a second guide shaft 26. The first guide shaft 24 is located below the first lead screw 11 and passes through a through hole in the first slider 13, slidably connecting to the first slider 13. The second guide shaft 26 is located below the second lead screw 12 and passes through a through hole in the second slider 14, slidably connecting to the second slider 14. The auxiliary guide device includes two guide strips. The first guide bar 25 and the second guide bar 27 are respectively located above the first lead screw 11, and the first slider 13 is slidably engaged with the first guide bar 25. The second guide bar 27 is located above the second lead screw 12, and the second slider 14 is slidably engaged with the second guide bar 27. The upper shell 8 is provided with three strip-shaped holes, and the first guide bar 25 and the second guide bar 27 are formed between the three strip-shaped holes. The first slider 13 is provided with a first guide groove 28 that is slidably engaged with the first guide bar 25, and the second slider 14 is provided with a second guide groove 29 that is slidably engaged with the second guide bar 27.

[0073] The machine body 1 is equipped with a control module. A distance sensor 6 is installed on the front side of the machine body 1, and a wearable sensor 7 is installed on the rear side of the machine body 1. Both the distance sensor 6 and the wearable sensor 7 are electrically connected to the control module. The control module is electrically connected to the transmission mechanism to control the transmission mechanism.

[0074] In this embodiment, the zoom range of the lens group is +5.00D (±0.25D) to -18.00D (±0.25D); the zoom method is: the front and rear lenses move horizontally in opposite directions, with linear zoom in the overlapping area of ​​the lens group; the distance between the front and rear lenses is 0.2mm (±0.05mm) between adjacent planes of the front and rear lenses; the flatness of the plane side of the front and rear lenses is less than or equal to 0.1mm (±0.05); the displacement of the front and rear lenses is: the centerline of the front and rear lenses moves 11.5mm to one side, that is, after the front and rear lenses are aligned, the front lens moves 11.5mm to the left, and the rear lens moves 11.5mm to the right at the same time. After the front and rear lenses return to the original point and coincide, they each move 11.5mm in opposite directions. m; Relative shift zoom ratio: When the front and rear lenses move in opposite directions by 1mm, the refractive power changes by 1.00D, i.e., 1.00D / mm; Pupillary distance: The designed pupillary distance is 60mm (±0.25mm). Within 5mm (±0.25mm) to the left and right of the center of the optical power, the refractive power change is within 0.50D (±0.25D); Linear zoom area: Within 3mm (±0.1mm) above and below the central axis of the inner and outer lenses, the refractive power change does not exceed 0.25D (±0.25); Non-linear zoom area: Outside 3mm (±0.1mm) above and below the central axis of the front and rear lenses, the refractive power change exceeds 0.50D (±0.25) but does not exceed 1.00D (±0.25D).

[0075] The left-right cross-movement of the front lens 4 and the rear lens 5 yields the refractive power at different movement distances along the lens central axis, as shown in the table below:

[0076]

[0077] (Example 2)

[0078] like Figure 7 , 8 As shown in Figure 9, the difference from Embodiment 1 is that the auxiliary guiding device in Embodiment 1 is not provided in the mounting cavity, and the guiding device is not provided with a guide shaft. The guiding device that restricts the movement of the lens provided in the mounting cavity includes sliding blocks 30 provided on both sides of the slider body 35 and a guide plate 34 provided on the side of the lower shell 9.

[0079] The lower shell 9 includes a left side plate 31, a middle side plate 33, and a right side plate 32 arranged in parallel to each other. A cavity is formed between the left side plate 31 and the middle side plate 33, and another cavity is formed between the middle side plate 33 and the right side plate 32. Two lead screws are respectively arranged in the two cavities. Guide plates 34 are provided on the sides of the left side plate 31, the middle side plate 33, and the right side plate 32 relative to the two lead screws. The lead screws are parallel to the guide plates 34.

[0080] The guide plate 34 is positioned corresponding to the sliding block 30; the sliding block 30 and the guide plate 34 constitute a guide device for the movement of the slider, and the sliding block 30 is in close contact with the adjacent guide plate 34 and can slide in the axial direction of the lead screw.

[0081] (Example 3)

[0082] like Figure 10 , 11 As shown, the difference between this embodiment and embodiment 2 is that: slots 37 are provided on both the left and right sides of the slider body 35. The slots 37 are gate-shaped slots, with grooves 371 extending into the slider body 35 on both sides and a relief surface 372 recessed into the slider body 35 in the middle.

[0083] The sliding block 30 includes a connector 301, which is formed as an elastic plate. A boss 302 is fixed on one side of the connector 301 near the guide plate 34. The boss 302 is a spherical protrusion, and the protrusion surface that slides against the guide plate 34 is a hemispherical surface. The connector 301 is inserted into the slot 37, and the boss 302 is in close contact with the adjacent guide plate 34 and can slide in the axial direction of the lead screw.

[0084] In this embodiment, since the connector 301 is an elastic plate, when the connector 301 is inserted into the slot 37 and the boss 302 is pressed against the adjacent guide plate 34, the connector 301 undergoes elastic deformation and protrudes slightly towards the clearance surface 372, so as to ensure that the boss 302 is always in close contact with the adjacent guide plate 34 when the slider assembly moves, thereby avoiding the sliding block and the lens from shaking or vibrating.

[0085] (Example 4)

[0086] like Figure 12 As shown, the difference between this embodiment and embodiment 3 is that: roller mounting cavities 38 are provided on both the left and right sides of the slider body 35, the sliding block 30 is a roller 39, the roller 39 is installed in the roller mounting cavity 38 of the slider body 35, the roller 39 is rotatably connected to the slider body 35 in the roller mounting cavity 38, the axis of the roller 39 is perpendicular to the axis of the lead screw, the rolling surface of the roller 39 is in close contact with the adjacent guide plate 34 and can roll in the axial direction of the lead screw.

[0087] In this embodiment, the roller 18 rolls on the guide plate 5, reducing mutual wear and improving service life. Based on the above-described preferred embodiment of the present invention, and through the above description, those skilled in the art can make various changes and modifications without departing from the technical concept of this invention. The technical scope of this invention is not limited to the contents of the specification, but must be determined by the scope of the claims.

Claims

1. A continuously zoomable glasses, comprising a body (1), a transmission mechanism, a control module, two temples (2) and a nose pad (3), wherein the temples (2) are hinged to the body (1), the nose pad (3) is mounted in the middle of the body (1), and at least one lens group is mounted on the body (1), each lens group comprising two overlapping and cross-movable front and rear lenses, characterized in that: All lenses are single-sided freeform continuous zoom lenses. One side of each lens is a plane, and the other side is a freeform surface. The freeform continuous zoom lens is generated using an inner B-spline surface fitting mathematical model, and the surface refractive power of the lens continuous zoom channel changes continuously. The control module drives the front and rear lenses of the lens group to move in opposite directions at the same speed through a transmission mechanism, thereby achieving zoom. The body (1) is provided with a housing for installing a transmission mechanism. The housing includes an upper shell (8) and a lower shell (9). The upper shell (8) and the lower shell (9) form an installation cavity. The installation cavity is provided with a transmission mechanism. Both lenses are connected to the transmission mechanism. The transmission mechanism includes a driving component and a transmission component. The driving component is connected to a drive gear. The transmission component includes two lead screws. The two lead screws are connected to driven gears. The drive gear and the driven gear mesh. Both lead screws are provided with sliders that are threadedly connected to them. The sliders include a slider body (35) and a lens mounting seat (36). The lens mounting seat (36) is fixedly connected to the lower part of the slider body (35). The two lenses are respectively connected to the two lens mounting seats (36). The threads of the two lead screws are turned in opposite directions so that the two sliders move in opposite directions at the same speed under the driving action of the drive member, thereby driving the front lens and the rear lens to move in opposite directions at the same speed. The mounting cavity is provided with a guide device and / or an auxiliary guide device to restrict the movement of the lens. The guide device and / or the auxiliary guide device are both arranged parallel to the lead screw, and the guide device and / or the auxiliary guide device are slidably connected to two sliders. The lower shell (9) includes a left side plate (31), a middle side plate (33), and a right side plate (32) arranged in parallel to each other in sequence. Two lead screws are respectively arranged in the cavities between the left side plate (31) and the middle side plate (33) and between the middle side plate (33) and the right side plate (32). The guiding device includes sliding blocks (30) arranged on both sides of the slider body (35), and also includes guide plates (34) arranged on the left side plate (31), the middle side plate (33), and the right side plate (32). The lead screws are parallel to the guide plates (34). The guide plates (34) are positioned corresponding to the sliding blocks (30). The sliding blocks (30) are in close contact with the adjacent guide plates (34) and can slide in the axial direction of the lead screws. The slider body (35) has slots (37) on both its left and right sides. The sliding block (30) includes a connector (301), which is formed as an elastic plate. A boss (302) is fixed on one side of the connector (301) near the guide plate (34). The connector (301) is inserted into the slot (37). The boss (302) is close to the adjacent guide plate (34) and can slide in the axial direction of the lead screw. The slot (37) is a gate-shaped slot with grooves (371) on both sides that penetrate into the slider body (35) and a relief surface (372) in the middle that is recessed into the slider body (35). The boss (302) is a spherical protrusion, and the protrusion surface that slides close to the guide plate (34) is a hemispherical surface. Alternatively, the slider body (35) may have roller mounting cavities (38) on both the left and right sides. The slider block (30) is a roller (39). The roller (39) is installed in the roller mounting cavity (38) of the slider body (35). The roller (39) is rotatably connected to the slider body (35) in the roller mounting cavity (38). The axis of the roller (39) is perpendicular to the axis of the lead screw. The rolling surface of the roller (39) is in close contact with the adjacent guide plate (34) and can roll in the axial direction of the lead screw.

2. The continuously zoomable glasses as described in claim 1, characterized in that: A magnet is fixedly connected to the lens, another magnet is installed on the slider, and the slider of the lens mounting base (36) is provided with an assembly groove for assembling magnetic materials. The lens mounting base (36) and the lens are connected by magnetic attraction.

3. The continuously zoomable glasses as described in claim 1, characterized in that: The body (1) is equipped with a control module. A distance sensor (6) is provided on the front side of the body (1), and a wearing sensor (7) is provided on the rear side of the body (1). A three-axis accelerometer is also provided in the body (1). The distance sensor (6), the wearing sensor (7) and the three-axis accelerometer are all electrically connected to the control module. The control module is electrically connected to the drive component to monitor the usage status of the continuous zoom glasses and control the transmission mechanism.

4. The continuously zoomable glasses as described in claim 1, characterized in that: The lens assembly includes two conjoined lenses for the left and right eyes, and each conjoined lens has a free-form surface with the same geometric function design for the left and right eyes.

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