Lens adjusting device

Abstract

The invention provides a lens adjusting device which is applied to the technical field of precision machinery, and the adjusting device comprises a driving part which comprises a worm and gear unit and a differential screw unit and is used for adjusting the position of a lens main body; the first fixing part is used for fixing the differential screw unit; and the second fixing part is used for fixing the worm and gear unit. The manual adjustment rotation amount is reduced through the worm and gear unit and the differential screw unit and then converted into the displacement amount of the lens, the precision of the manual adjustment of the inclination angle of the lens can be guaranteed, the scheme can reduce the manufacturing cost, the tiny displacement of the adjustment device in the vertical direction can be achieved through the difference value of screw pitches, and installation is convenient.

Description

Technical Field

[0001] The present application relates to the field of precision mechanical technology, and in particular to a lens adjustment device. Background Art

[0002] In recent years, with the increasing sophistication and integration of the semiconductor chip industry, people's requirements for optical lenses have become higher and higher, gradually moving towards high precision and large size. In order to achieve high-quality imaging and high resolution, the optical lens needs to have extremely high positional accuracy and stability, easy installation and adjustment, and simple processing and manufacturing.

[0003] In order to meet the high-precision requirements of optical measurement, the objective lens needs to be able to adjust the tilt angle online. There are two main existing adjustment methods, namely electric adjustment and manual adjustment. Electric adjustment requires a high-precision motor, which is relatively expensive. Manual adjustment can achieve high-precision adjustment at a lower cost. There are mainly the following manual adjustment methods: lever adjustment, wedge adjustment, and precision screw adjustment; these methods all use multi-point adjustment to create a displacement difference to achieve the purpose of tilting.

[0004] For large-size optical lenses, it is difficult to ensure the strength and stability of the lever mechanism when lever adjustment is used, and plastic deformation is easy to occur. If the strength and adjustment amount need to be guaranteed, more space is required; when wedge adjustment is used, the wedge adjustment has very high processing requirements for the inclined surface (roughness, form and position tolerance, angle tolerance), the structure is complex, the processing and manufacturing cost is high, and a single structure cannot achieve self-locking; when screw adjustment is used, the pitch of a single adjusting screw is large, and it is difficult to achieve high-precision adjustment. If a specific precision thread is used, the processing and manufacturing are complicated, and due to the small pitch, the strength of the thread is difficult to guarantee.

[0005] Based on this, a new technical solution is needed. Summary of the invention

[0006] In view of this, the embodiments of the present specification provide a lens adjustment device. For large-sized lenses, the lens itself is heavy and requires a device with a large load-bearing capacity. The adjustment accuracy of the lens is very high, and a precise adjustment device is required, which is difficult. The present application reduces the manual adjustment rotation amount through a differential screw unit and converts it into the displacement of the lens, and can ensure the accuracy of manual adjustment of the lens tilt angle. This solution can not only reduce manufacturing costs, but also utilize the difference in pitch to achieve a small vertical displacement of the adjustment device, and it is easy to install.

[0007] The embodiments of this specification provide the following technical solutions:

[0008] The embodiment of the present specification provides a lens adjustment device, the adjustment device supports a lens body and drives the lens body to move, the adjustment device includes:

[0009] A driving unit, comprising a worm gear unit and a differential screw unit, wherein the differential screw unit is connected to the worm gear unit, and the worm gear unit drives the differential screw unit to move, so as to adjust the position of the lens body;

[0010] A first fixing part, used to fix the differential screw unit, the first fixing part comprises a fixing ring and a cover plate, the fixing ring is fixedly arranged with the cover plate, the fixing ring is composed of a bottom surface, a first surface, a second surface, a third surface and a top surface, the cover plate is covered on the top surface, the cover plate is provided with a first through hole, the fixing ring is provided with a second through hole, and the differential screw unit can pass through the first through hole and the second through hole;

[0011] The second fixing part is used to fix the worm gear unit, the second fixing part has a bracket and a bracket base, the bracket is fixed to the bracket base, the fixing ring is arranged on the side of the bracket away from the bracket base, the bracket is provided with a third through hole, the bracket base is provided with a fourth through hole and a fifth through hole, and the worm gear unit can pass through the third through hole, the fourth through hole and the fifth through hole.

[0012] Preferably, the worm gear unit comprises a knob, a worm, a worm wheel, a first connecting rod, a second connecting rod, a third connecting rod and a fourth connecting rod, wherein the worm is meshed with the worm wheel.

[0013] The first connecting rod, the worm gear and the second connecting rod are sequentially connected on one side of the knob.

[0014] The worm wheel is sleeved on the third connecting rod, and the extended end of the third connecting rod is connected to the fourth connecting rod via the through hole of the worm wheel.

[0015] The first connecting rod and the second connecting rod pass through the fifth through hole, the third connecting rod passes through the fourth through hole, and the fourth connecting rod passes through the third through hole.

[0016] Preferably, when the knob rotates horizontally, the worm rotates horizontally along with the first connecting rod and the second connecting rod, and the horizontal rotation is converted into vertical rotation through the engagement of the worm and the worm wheel, and the fourth connecting rod rotates vertically along with the worm wheel and transmits torque to the differential screw unit, so that the differential screw unit moves to adjust the position of the lens body.

[0017] Preferably, the differential screw unit comprises a first connecting column, a second connecting column, a third connecting column and a fourth connecting column.

[0018] The first connecting column passes through the first through hole and is fixedly engaged with the first through hole.

[0019] The external thread of the first connecting column is connected to the internal thread of the fourth connecting column, the external thread of the fourth connecting column is connected to the internal thread of the third connecting column, and the second connecting column is sleeved above the third connecting column and located below the cover plate.

[0020] Preferably, after the internal thread of the fourth connecting column rotates to generate vertical displacement, the third connecting column is driven to generate vertical displacement, and the second connecting column is vertically displaced along with the third connecting column, so that the differential screw unit moves to adjust the position of the lens body.

[0021] Preferably, a positioning groove is provided on the peripheral surface of the third connecting column.

[0022] The third surface is provided with an opening,

[0023] A fixing device is used through the opening on the third surface and the positioning groove to achieve fixation between the fixing ring and the differential screw unit.

[0024] Preferably, the adjustment device further comprises a supporting angle piece, the supporting angle piece is fixedly mounted on the bottom surface and the supporting angle piece is a V-shaped groove structure.

[0025] The first surface is provided with a notch for inserting a fixed ball seat installed on the lens body. The fixed ball seat slides along the surface of the V-shaped groove through the notch until it falls to the bottom of the V-shaped groove, so that the supporting angle piece supports the fixed ball seat.

[0026] Preferably, a positioning pin may be further provided on a side of the supporting angle piece close to the bottom surface, and the positioning pin cooperates with a pin hole of the bottom surface to position the supporting angle piece.

[0027] Preferably, the adjustment device and the fixed ball seat are arranged in a set.

[0028] When three adjusting devices are provided, the three supporting angle pieces are distributed at 120 degrees on the periphery of the lens body so that the axes of the V-shaped grooves meet at one point.

[0029] Preferably, the cover plate is further provided with a guide hole for inserting a guide rod.

[0030] Two-point limiting is formed by the guide rod and the differential screw unit to limit the position of the adjusting device.

[0031] Compared with the prior art, the beneficial effects that can be achieved by at least one of the above technical solutions adopted in the embodiments of this specification include at least:

[0032] 1. The adjustment device of the present application can realize high-precision tilt angle adjustment of large-sized and heavy precision optical lenses;

[0033] 2. The driving part of the present application can utilize the difference in pitch to achieve a small vertical displacement of the adjustment device;

[0034] 3. This application has high adjustment accuracy and can be adjusted manually;

[0035] 4. The application has a compact structure, simple processing and manufacturing, easy disassembly and assembly, and convenient maintenance;

[0036] 5. The present application is easy to install, and the lens can be adaptively installed to a designated position after being placed on the first fixing portion. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0038] Figure 1 It is a schematic diagram of the assembly of the lens adjustment device and the lens of the present application;

[0039] Figure 2 is a partial cross-sectional view of the lens adjustment device of the present application;

[0040] Figure 3a It is a schematic diagram of the structure of the driving part of the lens adjustment device of the present application;

[0041] Figure 3b It is a schematic diagram of the structure of the differential screw unit of the lens adjustment device of the present application;

[0042] Figure 3c It is a schematic diagram of the structure of the worm gear unit of the lens adjustment device of the present application;

[0043] Figure 4 It is a schematic structural diagram of the first fixing part of the lens adjustment device of the present application;

[0044] Figure 5 It is a schematic diagram of the fixing ring structure of the lens adjustment device of the present application;

[0045] Figure 6 It is a schematic structural diagram of the second fixing part of the lens adjustment device of the present application;

[0046] Figure 7 is a cross-sectional view of a differential screw unit of the lens adjustment device of the present application;

[0047] Figure 8 It is a schematic diagram of the composition of the worm gear unit of the lens adjustment device of the present application;

[0048] Fig. 9 It is a schematic diagram of the structure of the guide module of the lens adjustment device of the present application;

[0049] Fig.10 It is a schematic diagram of the installation of the supporting angle piece of the lens adjustment device of the present application;

[0050] Reference numerals: 101-lens adjustment device, 102-lens, 103-fixed ball seat, 200-first fixing part, 201-fixing ring, 202-cover plate, 203-first through hole, 204-support angle piece, 205-second through hole, 206-top surface, 207-bottom surface, 208-notch, 300-second fixing part, 301-bracket, 302-bracket base, 303-third through hole, 304-bearing, 305-elastic retaining ring, 306-fourth through hole, 307-oil-free lining Sleeve, 308-locking nut, 400-differential screw unit, 401-first connecting column, 402-second connecting column, 403-third connecting column, 404-fourth connecting column, 405-positioning groove, 500-worm gear unit, 501-knob, 502-first connecting rod, 503-worm, 504-second connecting rod, 505-third connecting rod, 506-worm wheel, 507-fourth connecting rod, 508-screw a, 509-screw b, 601-guide rod, 602-spring. DETAILED DESCRIPTION

[0051] The embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0052] The following describes the implementation methods of the present application through specific examples, and those skilled in the art can easily understand other advantages and effects of the present application from the contents disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The present application can also be implemented or applied through other different specific implementation methods, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that, in the absence of conflict, the following embodiments and the features in the embodiments can be combined with each other. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work belong to the scope of protection of the present application.

[0053] It should be noted that various aspects of the embodiments within the scope of the appended claims are described below. It should be apparent that the aspects described herein can be embodied in a wide variety of forms, and any specific structure and / or function described herein is merely illustrative. Based on the present application, it should be understood by those skilled in the art that an aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number and aspect described herein can be used to implement the device and / or practice the method. In addition, other structures and / or functionalities other than one or more of the aspects described herein can be used to implement this device and / or practice this method.

[0054] It should also be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present application. The drawings only show components related to the present application rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0055] Additionally, in the following description, specific details are provided to facilitate a thorough understanding of the examples. However, it will be understood by those skilled in the art that the examples can be practiced without these specific details.

[0056] Based on this, the embodiment of this specification proposes a lens adjustment device:

[0057] like Figure 1 As shown, a lens seat (not shown) is provided above the lens 102, and the lens 102 is connected to the lens seat through the lens adjustment device 101, and the tilt angle of the lens 102 is adjusted. A fixed ball seat 103 is provided on the outer periphery of the upper end of the lens 102, and the lens adjustment device 101 is assembled with the lens 102 through the fixed ball seat 103.

[0058] like Figure 2 and Figure 3a As shown, the lens adjustment device 101 includes a driving part, a first fixing part 200 and a second fixing part 300. The driving part is fixedly installed with the first fixing part 200 and the second fixing part 300, and the first fixing part 200 is assembled with the fixed ball seat 103, and the second fixing part 300 is fixedly connected with the lens seat. The vertical movement of the driving part drives the lens 102 to perform fine angle adjustment.

[0059] The drive unit includes a worm gear unit 500 (such as Figure 3b ) and the differential screw unit 400 (as shown Figure 3c As shown in FIG. 1 , the differential screw unit 400 is connected to the worm gear unit 500 , and the worm gear unit 500 drives the differential screw unit 400 to move to adjust the position of the lens 102 body.

[0060] like Figure 4 and Figure 5 As shown, the first fixing part 200 is used to fix the differential screw unit 400. The first fixing part 200 has a fixing ring 201 and a cover plate 202. The fixing ring 201 and the cover plate 202 are fixedly arranged. The fixing ring 201 is composed of a bottom surface 207, a first surface, a second surface, a third surface and a top surface 206. The cover plate 202 is covered on the top surface 206. The cover plate 202 is provided with a first through hole 203. The fixing ring 201 is provided with a second through hole 205. The differential screw unit 400 can pass through the first through hole 203 and the second through hole 205, so that the differential screw unit 400 is engaged and fixed with the first fixing part 200.

[0061] Preferably, the adjustment device also includes a supporting angle piece 204, which is fixedly mounted on the bottom surface 207 and is a V-groove structure. The first surface is provided with a notch 208 for inserting a fixed ball seat 103 installed on the lens 102 body. The fixed ball seat 103 slides along the surface of the V-groove through the notch 208 until it falls to the bottom of the V-groove, so as to achieve support of the fixed ball seat 103 by the supporting angle piece 204, so that the adjustment amount of the driving part can be transmitted to the lens.

[0062] Preferably, the V-shaped groove may be designed at 90°, which is more conducive to adaptive positioning support after the fixed ball seat 103 on the lens 102 falls into it.

[0063] Preferably, a positioning pin may be provided on one side of the supporting angle piece 204 close to the bottom surface 207 , and the positioning pin cooperates with the pin hole of the bottom surface 207 to position the supporting angle piece 204 , thus playing a role of preliminary positioning.

[0064] like Figure 6 As shown, the second fixing part 300 is used to fix the worm gear unit 500. The second fixing part 300 has a bracket 301 and a bracket base 302. The bracket 301 and the bracket base 302 are fixedly arranged. The fixing ring 201 is arranged on the side of the bracket 301 away from the bracket base 302. The bracket 301 is provided with a third through hole 303, and the bottom surface of the bracket base 302 is provided with a fourth through hole 306, and fifth through holes are provided on both sides. The worm gear unit 500 can pass through the third through hole 303, the fourth through hole 306 and the fifth through hole to fix its position.

[0065] Preferably, the bracket 301 is L-shaped, the upper end of the bracket 301 is fixedly connected to the lens mount, and the bottom of the bracket 301 is connected to a U-shaped bracket base 302 for supporting the driving part and connecting to the lens mount.

[0066] like Figure 7As shown, the differential screw unit 400 includes a first connecting column 401, a second connecting column 402, a third connecting column 403 and a fourth connecting column 404. The first connecting column 401 passes through the first through hole 203 and is fixed with the first through hole 203. The lower section of the first connecting column 401 is provided with an external thread. The fourth connecting column 404 is provided with an internal thread and an external thread in the same direction as the internal thread. The pitch of the internal thread and the external thread is different to achieve a reduction in the adjustment amount. The external thread of the first connecting column 401 is connected to the internal thread of the fourth connecting column 404. The third connecting column 403 is provided with an internal thread, and its upper surface is conical. The external thread of the fourth connecting column 404 is connected to the internal thread of the third connecting column 403. The second connecting column 402 is sleeved on the top of the third connecting column 403 and is located below the cover plate 202. The third connecting column 403 drives the first fixing part 200 to move.

[0067] The second connecting post 402 can transmit the up-and-down movement of the third connecting post 403 to the first fixing portion 200 , so as to drive the entire first fixing portion 200 to move up and down, that is, can drive the lens 102 to move.

[0068] Preferably, the lower surface of the second connecting column 402 is conical, which can be adapted to the conical upper surface of the third connecting column 403, which can effectively increase the stability of the fit. The diameter of the second connecting column 402 is smaller than the diameter of the third connecting column 403, and can produce a tight fit with the first fixing part 200, further improving the stability during transmission.

[0069] Preferably, after the internal thread of the fourth connecting column 404 rotates to generate vertical displacement, the third connecting column 403 is driven to generate vertical displacement, and the second connecting column 402 is vertically displaced along with the third connecting column 403, so that the differential screw unit 400 moves to adjust the position of the lens 102 body.

[0070] Preferably, a positioning groove 405 is provided on the circumference of the third connecting column 403, and an opening is provided on the third surface, and a fixing device is used through the opening on the third surface and the positioning groove 405 to achieve fixation between the fixing ring 201 and the differential screw unit 400. The positioning groove 405 cooperates with a key provided inside the first fixing part 200 to achieve anti-rotation cooperation, and converts the rotational motion of the third connecting column 403 into up and down motion.

[0071] Preferably, the material of the differential screw unit 400 can be 0Cr18Ni9, the internal thread and external thread of the fourth connecting column 404 can be M20 and M30 respectively, and the ordinary thread pitch is 1.0mm and 1.5mm. This solution can not only reduce the manufacturing cost, but also utilize the difference in pitch to achieve a small vertical displacement of the lens adjustment device 101.

[0072] The adjustment of precision optical lenses requires high accuracy, and the adjustment using only differential screws is far from meeting the requirements. Therefore, the adjustment amount needs to be further reduced. The worm gear unit 500 has a relatively large transmission and can achieve self-locking. The use of the worm gear unit 500 can further improve the adjustment accuracy, and the adjustment amount input by the manual rotating knob 501 can be reduced and converted into the adjustment amount for the lens 102.

[0073] like Figure 8 As shown, the worm gear unit 500 includes a knob 501, a worm 503, a worm wheel 506, a first connecting rod 502, a second connecting rod 504, and a third connecting rod 505. The worm 503 is meshed with the worm wheel 506. The first connecting rod 502, the worm 503, and the second connecting rod 504 are connected in sequence on one side of the knob 501. The worm wheel 506 is sleeved on the third connecting rod 505. The protruding end of the third connecting rod 505 is connected to the third connecting rod 505 via the through hole of the worm wheel 506. The first connecting rod 502 and the second connecting rod 504 pass through the fifth through hole, and the third connecting rod 505 passes through the fourth through hole 306.

[0074] Preferably, when the knob 501 rotates horizontally, the worm 503 rotates horizontally along with the first connecting rod 502 and the second connecting rod 504, and the horizontal rotation is converted into a vertical rotation through the engagement of the worm 503 and the worm wheel 506, and the fourth connecting rod 507 rotates vertically along with the worm wheel 506 and transmits the torque to the differential screw unit 400, so that the differential screw unit 400 moves to adjust the position of the lens 102 body.

[0075] Preferably, a driving hole is provided on the worm gear 506, and a keyway is provided inside the driving hole, which cooperates with the key provided at the bottom of the fourth connecting column 404 to achieve anti-rotation, so that the worm gear 506 can drive the fourth connecting column 404 to rotate and achieve up and down movement. A depth is left in the driving hole for the fourth connecting column 404 to move up and down, which can ensure that the fourth connecting column 404 has sufficient travel.

[0076] Preferably, a fourth connecting rod 507 may be provided on the worm gear 506, and the fourth connecting rod 507 passes through the third through hole 303. The driving hole is set on the fourth connecting rod 507. The setting of the fourth connecting rod 507 can avoid opening a hole on the worm gear 506 to ensure the transmission strength of the worm gear 506 and increase the life of the worm gear 506. The setting of the fourth connecting rod 507 can open a deeper driving hole inside it, so that the fourth connecting column 404 has more space to move up and down.

[0077] Preferably, bearings 304 are installed in the third through hole 303 and the fourth through hole 306, and are axially fixed by an elastic retaining ring 305 to fix the position of the worm gear 506. Oil-free bushings 307 are installed in the fifth through holes on the left and right sides of the bracket base 302 and fixed by locking nuts 308. The worm 503 structure passes through the oil-free bushings 307 for support. The worm 503 has both linear motion and rotational motion during movement. The use of oil-free bushings 307 can adapt well to different forms of motion, and due to the self-lubricating design, frequent maintenance or lubrication is not required.

[0078] Specifically, the worm gear unit 500 consists of a knob 501, a first connecting rod 502, a worm 503, a second connecting rod 504, a third connecting rod 505, a worm wheel 506, a fourth connecting rod 507, a screw a508, and a screw b509. The knob 501 is connected to the first connecting rod 502 by a thread, the second connecting rod 504 passes through the worm 503 and is fixed by a screw a508, and the second connecting rod 504 extends out of a thread and is connected to the first connecting rod 502; the worm wheel 506 is sleeved on the third connecting rod 505 and is fixed by a screw b509, and the third connecting rod 505 extends out of a thread and is connected to the fourth connecting rod 507. The transmission process is manual horizontal rotation 501, driving the worm 503 on the first connecting rod 502 and the second connecting rod 504 to rotate, and the worm 503 and the worm wheel 506 realize torque transmission through tooth-to-tooth engagement, converting the horizontal rotation into vertical rotation, and then driving the fourth connecting rod 507 to rotate, and finally transmitting the torque to the fourth connecting column 404 through the driving hole to realize vertical rotation.

[0079] Preferably, according to the adjustment accuracy of the lens 102 and the space size limitation, the transmission ratio of the worm wheel 506 and the worm 503 is 80, and the modulus is 0.5. According to the modulus and the condition required for self-locking (lead angle <4°), the number of heads of the worm 503 is selected to be 1 and the number of teeth of the worm wheel 506 is selected to be 80. According to the constraints of the structural size, the appropriate pitch diameters of the worm wheel 506 and the worm 503 are selected. According to the strength calculation and the required torque, the material of the worm wheel 506 can be CAC, and the material of the worm 503 can be SUS304.

[0080] By using the differential screw unit 400 and the worm gear unit 500 in combination, the manual rotation adjustment amount can be reduced, thereby improving the adjustment accuracy, and the rotation amount can be converted into a vertical displacement, so that the operator can accurately adjust the tilt angle of the large-sized and heavy precision optical lens 102 manually, and the parts of the lens adjustment device 101 are simple to manufacture and easy to adjust.

[0081] like Fig. 9 As shown, the cover plate 202 is also provided with a guide hole for the guide rod 601 to be inserted into. The guide rod 601 and the differential screw unit 400 form a two-point limit to limit the position of the adjustment device.

[0082] One end of the guide rod 601 is inserted into the guide hole, and the other end is inserted into the hole set on the lens mount, forming a two-point limit function for determining the installation position of the lens adjustment device 101.

[0083] Preferably, a spring 602 is sleeved on the top of the differential screw unit 400, one end of the spring 602 is connected to the cover plate 202, and the other end is connected to the lens mount to prevent the adjustment mechanism from shifting and also to prevent the technician from adjusting too much during manual adjustment.

[0084] When the precision optical lens is installed vertically and located at a high position, due to its large size, heavy weight, difficulty in assembly, disassembly and adjustment, an adaptive installation method is required. This lens adaptive installation method is achieved by supporting angle pieces 204 and fixed ball seats 103. The supporting angle pieces 204 are designed in the form of a V-groove, and the fixed ball seats 103 are designed in a spherical shape. The spherical surface and the surface of the V-groove are in point contact, and the friction force is small. During the assembly and disassembly process, when the position of the lens 102 deviates, the fixed ball seat 103 can also drive the lens 102 to slide along the surface of the V-groove until it falls to the bottom of the V-groove and contacts at two points.

[0085] Preferably, the lens adjustment device 101 and the fixed ball seat 103 are arranged in a set. When three adjustment devices are provided, they are evenly distributed at 120° on the outer circle of the lens 102. The three lens adjustment devices 101 determine an adjustment plane. After the first fixing parts 200 of the three lens adjustment devices 101 are adjusted by the driving part, the final positions are at different heights, so that the lens 102 is tilted, thereby adjusting the tilt angle of the lens 102. That is, the three supporting angle pieces 204 are distributed at 120° on the periphery of the main body of the lens 102, so that the axes of the V-grooves intersect at one point, and the fixed ball seat 103 is placed on the first fixing part 200 and moves with the first fixing part 200 to drive the lens 102 to achieve fine-tuning of the tilt angle, and the adjustment accuracy of the lens 102 is accurate and uniform.

[0086] like Fig.10 As shown, when there are three lens adjustment devices 101, the supporting angle pieces 204 are arranged at 120 degrees, and the three V-groove axes intersect at one point. When the fixed ball seat 103 of the lens 102 is placed on the supporting angle piece 204, the optical axis of the lens 102 will adaptively coincide with the intersection of the V-grooves, thereby realizing automatic centering of the lens 102 and avoiding multiple adjustments during assembly.

[0087] Preferably, the lens adaptive installation method comprises the following steps:

[0088] S1, three lens adjustment devices 101 are installed and fixed on the same circle, and through adjustment, the V-groove axes of the three supporting angle pieces 204 intersect at one point;

[0089] S2, lift the lens 102, place the three fixed ball seats 103 between the lens adjustment devices 101, and slowly raise them into the inner circles of the three lens adjustment devices 101, with the height being substantially flush with the notch 208 of the fixed ring 201;

[0090] S3, slowly rotate the lens 102 to a certain angle, and observe until the fixed ball seat 103 is located above the supporting angle piece 204;

[0091] S4, slowly lower the lens 102 until the fixed ball seat 103 and the supporting angle piece 204 are in contact, and then the lens 102 falls into the V-shaped groove adaptively by its own gravity, so that the lens 102 is fixed and centered.

[0092] In this specification, the same or similar parts between the various embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the embodiments described later, the description is relatively simple, and the relevant parts can be referred to the partial description of the previous embodiments.

[0093] The above are only specific implementations of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A lens adjustment device, characterized in that: The adjusting device supports the lens body and drives the lens body to move, and the adjusting device includes: A driving unit, comprising a worm gear unit and a differential screw unit, wherein the differential screw unit is connected to the worm gear unit, and the worm gear unit drives the differential screw unit to move, so as to adjust the position of the lens body; A first fixing part, used to fix the differential screw unit, the first fixing part comprises a fixing ring and a cover plate, the fixing ring is fixedly arranged with the cover plate, the fixing ring is composed of a bottom surface, a first surface, a second surface, a third surface and a top surface, the cover plate is covered on the top surface, the cover plate is provided with a first through hole, the fixing ring is provided with a second through hole, and the differential screw unit can pass through the first through hole and the second through hole; The second fixing part is used to fix the worm gear unit, the second fixing part has a bracket and a bracket base, the bracket is fixed to the bracket base, the fixing ring is arranged on the side of the bracket away from the bracket base, the bracket is provided with a third through hole, the bracket base is provided with a fourth through hole and a fifth through hole, and the worm gear unit can pass through the third through hole, the fourth through hole and the fifth through hole.

2. The lens adjustment device according to claim 1, characterized in that: The worm gear unit includes a knob, a worm, a worm wheel, a first connecting rod, a second connecting rod, a third connecting rod and a fourth connecting rod, wherein the worm is meshed with the worm wheel. The first connecting rod, the worm gear and the second connecting rod are sequentially connected on one side of the knob. The worm wheel is sleeved on the third connecting rod, and the extended end of the third connecting rod is connected to the fourth connecting rod via the through hole of the worm wheel. The first connecting rod and the second connecting rod pass through the fifth through hole, the third connecting rod passes through the fourth through hole, and the fourth connecting rod passes through the third through hole.

3. The lens adjustment device according to claim 2, characterized in that: When the knob rotates horizontally, the worm rotates horizontally along with the first connecting rod and the second connecting rod, and the horizontal rotation is converted into vertical rotation through the engagement of the worm and the worm wheel. The fourth connecting rod rotates vertically along with the worm wheel and transmits torque to the differential screw unit, so that the differential screw unit moves to adjust the position of the lens body.

4. The lens adjustment device according to claim 1, characterized in that: The differential screw unit includes a first connecting column, a second connecting column, a third connecting column and a fourth connecting column, The first connecting column passes through the first through hole and is fixedly engaged with the first through hole. The external thread of the first connecting column is connected to the internal thread of the fourth connecting column, the external thread of the fourth connecting column is connected to the internal thread of the third connecting column, and the second connecting column is sleeved above the third connecting column and located below the cover plate.

5. The lens adjustment device according to claim 4, characterized in that: After the internal thread of the fourth connecting column rotates to generate vertical displacement, the third connecting column is driven to generate vertical displacement, and the second connecting column is vertically displaced along with the third connecting column, so that the differential screw unit moves to adjust the position of the lens body.

6. The lens adjustment device according to claim 4, characterized in that: The circumferential surface of the third connecting column is provided with a positioning groove, The third surface is provided with an opening, A fixing device is used through the opening on the third surface and the positioning groove to achieve fixation between the fixing ring and the differential screw unit.

7. The lens adjustment device according to any one of claims 1 to 6, characterized in that: The adjustment device further comprises a supporting angle piece, wherein the supporting angle piece is fixedly mounted on the bottom surface and has a V-shaped groove structure. The first surface is provided with a notch for inserting a fixed ball seat installed on the lens body. The fixed ball seat slides along the surface of the V-shaped groove through the notch until it falls to the bottom of the V-shaped groove, so that the supporting angle piece supports the fixed ball seat.

8. The lens adjustment device according to claim 7, characterized in that: A positioning pin may also be provided on one side of the supporting angle piece close to the bottom surface, and the positioning pin cooperates with a pin hole of the bottom surface to position the supporting angle piece.

9. The lens adjustment device according to claim 7, characterized in that: The adjusting device and the fixed ball seat are arranged as a set. When three adjusting devices are provided, the three supporting angle pieces are distributed at 120 degrees on the periphery of the lens body so that the axes of the V-shaped grooves meet at one point.

10. The lens adjustment device according to any one of claims 1 to 6, characterized in that: The cover plate is also provided with a guide hole for the guide rod to be inserted into. Two-point limiting is formed by the guide rod and the differential screw unit to limit the position of the adjusting device.

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