Adjustable group fixing device and lens

Abstract

The utility model relates to an adjustable group fixing device and a lens, the adjustable group fixing device comprises a group, a fixing frame and a locking assembly, and the outer side surface of the group is provided with a plurality of support arms distributed along the circumferential direction of the group; a second connecting hole and a gasket groove are formed in the fixing frame, and an adjusting gasket is arranged in the gasket groove; the locking assembly is used for achieving axial locking and radial movement of the group relative to the fixing frame and comprises a connecting fastening piece and an elastic piece, the connecting fastening piece penetrates through the supporting arm and is connected with the fixing frame, and the elastic piece is arranged between the connecting fastening piece and the group. According to the utility model, the coaxiality and parallelism of the sensitive group can be rapidly adjusted according to the condition of the whole optical system, so that the whole lens is close to a design value, and the processing and assembling process difficulty is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of optical imaging, in particular to an adjustable group fixing device and a lens. Background Art

[0002] With the rapid development of high-tech, all-in-one video conferencing devices are becoming more and more widely used. In order to meet the market demand for high resolution, the chip size of the lens is getting larger and larger, and the resolution is getting higher and higher, which makes the design of the lens more difficult and the tolerance sensitivity of each group is getting higher and higher, which poses a new challenge to the mold forming and manufacturing process of the product.

[0003] The main factor affecting the resolution performance of the lens is the coaxiality and parallelism deviation between groups. Coaxiality refers to the degree of overlap between the central axis of the group and the central axis of other groups of the lens. Parallelism refers to the degree of overlap between the positioning surface of the group and the positioning surface of the fixed frame. The smaller the two tolerance deviations, the better the lens resolution, and vice versa.

[0004] In the existing integrated lens manufacturing technology, the way to adjust the coaxiality is to clamp and press the group with a mechanical clamp to make the group move radially on the fixed frame until the center axis of the group coincides with the center axis of the fixed frame. The way to adjust the parallelism is to add gaskets of different thicknesses to the positioning surfaces of the group and the fixed frame for leveling, which requires repeated disassembly and assembly to achieve the best imaging effect. With the existing manufacturing technology, the group can only adjust a sensitive tolerance individually, the process is complex, the production cost is high, and there are restrictions on the lens adjustment ratio. If the incident angle of light is large and there is obstruction, it will affect the adjustment degree and fail to achieve the best imaging effect. Utility Model Content

[0005] The purpose of the utility model is to solve the above problems and provide a group fixing device and a lens.

[0006] In order to achieve the above-mentioned purpose, the utility model provides a group fixing device, comprising:

[0007] A group, on the side of which are provided a plurality of support arms distributed along its circumference;

[0008] A fixed frame is arranged on one side of the group; the fixed frame is provided with a plurality of gasket grooves corresponding to the support arms, and a detachable adjustment gasket is arranged in the gasket groove, and two end surfaces of the adjustment gasket are respectively against the fixed frame and the group;

[0009] A locking assembly for realizing axial locking and radial movement of the group relative to the fixing frame comprises a connecting fastener and an elastic member, wherein the connecting fastener passes through the support arm and is connected to the fixing frame, and the elastic member is arranged between the connecting fastener and the group.

[0010] According to one aspect of the utility model, each of the support arms is provided with a first connection hole, and a limiting boss is provided in the first connection hole protruding along the inner wall thereof;

[0011] The fixing frame is provided with a plurality of second connection holes corresponding one to one with the first connection holes;

[0012] One end of the connecting fastener passes through the first connecting hole, is arranged in the second connecting hole, and is fixedly connected to the fixing frame through the second connecting hole; a protruding limiting end plate is provided on the outer side surface of the connecting fastener; a designed gap is provided between the side surface of the connecting fastener and the inner wall of the first connecting hole;

[0013] The elastic member is sleeved on the connecting fastener and is arranged in the first connecting hole, and the two ends of the elastic member are respectively against the limiting end plate and the limiting boss;

[0014] According to one aspect of the utility model, the connecting fastener comprises a connecting piece and a flange ring.

[0015] The flange ring is arranged in the first connecting hole, and its outer diameter is smaller than the inner diameter of the first connecting hole; the limiting end plate is protrudingly arranged on the outer circumferential surface of the flange ring;

[0016] The connecting member includes a connecting rod and a connecting member end cap, the flange ring is provided with a flange ring inner hole, one end of the connecting rod passes through the flange ring inner hole and the first connecting hole, is arranged in the second connecting hole, and is fixedly connected to the fixing frame through the second connecting hole; the outer diameter of the connecting member end cap is larger than the inner diameter of the flange ring inner hole;

[0017] According to one aspect of the utility model, the elastic member is arranged in the first connecting hole and sleeved on the flange ring, and two ends of the elastic member respectively abut against the limiting end plate and the limiting boss.

[0018] According to one aspect of the utility model, the connecting rod is a threaded rod, the second connecting hole is a threaded hole, and the connecting rod and the second connecting hole are fixedly connected by threads.

[0019] According to one aspect of the utility model, a lens arrangement groove coaxially arranged with the group is provided on the group.

[0020] According to one aspect of the utility model, the limiting boss separates the first connecting hole into a connected upper connecting hole and a lower connecting hole, the inner diameter of the upper connecting hole is larger than the inner diameter of the lower connecting hole, the outer diameter of the elastic member is larger than the inner diameter of the lower connecting hole and smaller than the inner diameter of the upper connecting hole; the outer diameter of the outer wall of the flange ring on the flange ring is smaller than the inner diameter of the lower connecting hole.

[0021] According to one aspect of the utility model, a plurality of the support arms are evenly distributed on the outer side of the group along its circumference.

[0022] According to one aspect of the utility model, a claw engaging groove is provided on the top surface of the support arm, and the claw engaging groove is arranged on the midline of the support arm.

[0023] According to one aspect of the utility model, a glue dispensing groove is provided on the end surface of the support arm facing the fixing frame.

[0024] According to one aspect of the utility model, the end surface of the adjusting gasket abutting against the fixing frame and the end surface abutting against the group are both planes and parallel to each other.

[0025] According to one aspect of the utility model, an angle between an end surface of the adjusting gasket abutting against the fixing frame and an end surface thereof abutting against the group is an acute angle.

[0026] According to one aspect of the utility model, the cross-section of the adjusting gasket is T-shaped, including an insertion portion and a pull-out portion perpendicular to the insertion portion, the shape of the insertion portion is adapted to the shape of the gasket groove, and the width of the pull-out portion is greater than the width of the gasket groove.

[0027] According to one aspect of the utility model, the utility model provides a lens, including a lens barrel and the above-mentioned group fixing device, wherein the lens barrel is arranged on a side of the group away from the fixing frame.

[0028] Compared with the prior art, the beneficial effects of the utility model are:

[0029] The utility model discloses an adjustable group fixing device, including a group, a fixed frame and a locking assembly. The locking assembly includes a connecting fastener and an elastic member. The connecting fastener includes a connecting member and a flange ring. The connecting rod of the connecting member passes through the through holes on the group support arm and the flange ring and is connected to the fixed frame. The flange ring is sleeved on the connecting rod of the connecting member. The elastic member is sleeved on the flange ring. The pressure of the elastic member is used to make the group bearing surface close to the fixed frame, so as to realize the functions of axial locking and radial movement of the group. The centering device no longer needs to provide a front pressure-attached group, so that the coaxiality adjustment operation is convenient and the accuracy is higher. The flange ring is used to isolate the connecting member from the elastic member and the group, so as to avoid the connecting member from being affected by the radial movement of the group and bearing radial force, thereby improving the stability of the connection between the group and the fixed frame and extending the service life of the connecting member. The utility model can adjust the coaxiality and parallelism of sensitive groups, compensate for the eccentricity and tilt of multiple lens groups, make the entire lens close to the design value to achieve the original optical design goal, and reduce the difficulty of processing and assembly process.

[0030] The fixed frame is provided with shim grooves corresponding to the support arms. The shims can be inserted into the shim grooves and abut against the end faces of the fixed frame and the group. By adjusting the thickness of the shims in different shim grooves, the parallelism of the group and the lens can be adjusted. The elastic pressure margin of the elastic part is used to achieve simple and fast leveling, avoiding the shortcomings of long working hours and complicated operations caused by the previous disassembly and adjustment of screws. The coaxiality and parallelism adjustment of the entire group are completed on the same centering equipment, which fundamentally reduces the process steps and greatly reduces the production cost; at the same time, it can reduce the sensitivity requirements of optical tolerances, realize the requirements of matching large target surface chips and high design performance, and make up for the shortcomings of existing production processes and mold technologies.

[0031] The angle between the two end faces of the adjustment gasket that rest against the group and the fixed frame can be set to an acute angle, which is convenient for inserting the gasket. By adjusting the insertion position, the gasket can squeeze the support arm, so that the group can produce an axial tilt of 0.01°~0.1°. According to the lens detection feedback, real-time adjustment can be achieved, saying goodbye to the previous process of repeated disassembly and assembly to adjust the parallelism. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of the structure of the lens of some embodiments of the utility model;

[0033] Figure 2 It is a schematic structural diagram of an adjustable group fixing device in some embodiments of the utility model;

[0034] Figure 3 It is a cross-sectional schematic diagram of an adjustable group fixing device in some embodiments of the utility model;

[0035] Figure 4 It is a schematic diagram of the structural disassembly of the adjustable group fixing device in some embodiments of the utility model;

[0036] Figure 5 A top view of a group of some embodiments of the present invention;

[0037] Figure 6 It is a schematic cross-sectional view of gaskets in some embodiments of the present invention.

[0038] The corresponding relationship between the component names and the reference numerals is as follows:

[0039] 1. Lens barrel; 2. Fixed frame; 3. Group; 4. Connector; 5. Adjustment gasket; 6. Flange ring; 7. Elastic part;

[0040] 21. second connecting hole; 22. gasket groove;

[0041] 31. first connecting hole; 32. supporting arm; 33. claw engaging groove; 34. glue dispensing groove;

[0042] 311, lower connection hole; 312, upper connection hole;

[0043] 61. Outer wall of flange ring; 62. Inner hole of flange ring; 63. Limiting end plate. DETAILED DESCRIPTION

[0044] In order to more clearly illustrate the implementation of the utility model or the technical solution in the prior art, the drawings required for use in the implementation are briefly introduced below. Obviously, the drawings described below are only some implementations of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0045] When describing the embodiments of the present invention, the orientation or positional relationship expressed by the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the orientation or positional relationship shown in the relevant drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the above terms should not be understood as limiting the present invention.

[0046] The present invention will be described in detail below in conjunction with the accompanying drawings and specific implementation methods. The implementation methods cannot be described one by one here, but the implementation methods of the present invention are not therefore limited to the following implementation methods.

[0047] like Figure 1 As shown, the utility model provides a lens, including a lens barrel 1 and an adjustable group fixing device, the adjustable group fixing device includes a fixing frame 2, a group 3 and a locking assembly. The locking assembly is used to achieve axial locking and radial movement of the group 3 relative to the fixing frame 2. It should be noted that the optical axis direction of the lens on the group 3 is the axial direction in the utility model, and the radial direction of the lens on the group 3 is the radial direction in the utility model.

[0048] like Figures 2 to 6 As shown, the utility model provides an adjustable group fixing device, including a group 3, a fixing frame 2 and a locking assembly. A plurality of support arms 32 distributed along the circumference of the group 3 are provided on the side surface, each support arm 32 is provided with a first connection hole 31, and a limiting boss protruding along the inner wall of the first connection hole 31 is provided in the first connection hole 31. The fixing frame 2 is arranged on one side of the group 3, and a plurality of second connection holes 21 corresponding to the first connection holes 31 are provided on the fixing frame 2. A plurality of gasket grooves 22 corresponding to the support arms 32 are provided on the fixing frame 2, and a detachable adjustment gasket 5 is provided in the gasket groove 22, and the two end faces of the adjustment gasket 5 are respectively against the fixing frame 2 and the group 3.

[0049] The locking assembly includes a connecting fastener and an elastic member 7. One end of the connecting fastener passes through the first connecting hole 31, is arranged in the second connecting hole 21, and is fixedly connected to the fixing frame 2 through the second connecting hole 21; a protruding limiting end plate 63 is provided on the outer side of the connecting fastener; and a designed gap is provided between the side of the connecting fastener and the inner wall of the first connecting hole 31. The elastic member 7 is sleeved on the connecting fastener and arranged in the first connecting hole 31, and the two ends of the elastic member 7 are respectively against the limiting end plate 63 and the limiting boss. By setting the designed gap between the side of the connecting fastener and the inner wall of the first connecting hole 31, the group 3 can move radially relative to the fixing frame 2.

[0050] By using the adjustable group fixing device composed of the above components, the coaxiality adjustment of the sensitive group can be realized under the current integrated machine structure framework, the eccentricity of other lens groups can be compensated, and the optical high resolution requirements can be achieved. By adjusting the gasket and the locking assembly, the coaxiality and parallelism of the sensitive group can be adjusted at the same time, the eccentricity and tilt of other lens groups can be compensated, and the optical high resolution requirements can be achieved. Among them, group 3 is used to fix the lens group, and the coaxiality of the lens group is adjusted by adjusting the radial movement of group 3; the fixed frame 2 is used to support and fix group 3. The connecting member 4 is used to fix the group 3 with the fixed frame 2, and the two ends of the elastic member 7 are respectively against the limiting boss in the first connecting hole 31 on the group 3 and the limiting end plate 63 on the flange ring 6, so that the group 3 and the fixed frame 2 can move radially while being axially locked, thereby realizing the coaxiality adjustment of the lens group without disassembling the lens group. The adjusting gasket 5 is used to adjust the parallelism of the group.

[0051] Preferably, the connecting fastener includes a connecting member 4 and a flange ring 6. The flange ring 6 is arranged in the first connecting hole 31, and its outer diameter is smaller than the inner diameter of the first connecting hole 31; the limiting end plate 63 is protrudingly arranged on the outer circumferential surface of the flange ring 6. The connecting member 4 includes a connecting rod and a connecting member end cap. The flange ring 6 is provided with a flange ring inner hole 62. One end of the connecting rod passes through the flange ring inner hole 62 and the first connecting hole 31, is arranged in the second connecting hole 21, and is fixedly connected to the fixing frame 2 through the second connecting hole 21; the outer diameter of the connecting member end cap is larger than the inner diameter of the flange ring inner hole 62. The elastic member 7 is arranged in the first connecting hole 31 and is sleeved on the flange ring 6. The two ends of the elastic member 7 are respectively against the limiting end plate 63 and the limiting boss.

[0052] The elastic member 7, the flange ring 6 and the connecting member 4 can be installed in the first connecting hole 31 in sequence. The connecting rod of the connecting member 4 passes through the first connecting hole 31 and the inner hole 62 of the flange ring and is fixedly connected to the second connecting hole 21. The flange ring 6 is sleeved on the connecting rod of the connecting member 4. The elastic member 7 is sleeved on the flange ring 6, and its two ends are respectively against the limiting end plate and the limiting boss. The pressure generated by the compression of the elastic member 7 makes the relative end faces of the fixed frame 2 and the group 3 flat and pressed, so as to realize the axial locking and radial movement of the fixed frame 2 and the group 3, so as to facilitate the maximum coincidence of the central axis of the group 3 with the central axis of the lens according to the actual situation of the lens optical system, realize the rapid adjustment of the coaxiality of the lens group, make the lens meet the optical design performance requirements, make up for the shortcomings of the existing production technology and the precision of the mold products, greatly improve the lens production yield, and improve the production efficiency.

[0053] By providing a flange ring 6 between the connecting member 4 and the elastic member 7, the connecting member 4 can be isolated from the elastic member 7 and the group 3, thereby preventing the elastic member 7 from affecting the connection stability between the connecting member 4 and the fixed frame 2. At the same time, the flange ring 6 supports the connecting rod of the connecting member 4, thereby preventing the connecting rod 4 from being subjected to radial loads and affecting the stability of the group 3.

[0054] The first connection hole 31 is a stepped hole. The limiting boss divides the first connection hole 31 into an upper connection hole 311 and a lower connection hole 312 that are connected. The inner diameter of the upper connection hole 311 is larger than the inner diameter of the lower connection hole 312. The outer diameter of the elastic member 7 is larger than the inner diameter of the lower connection hole 312 and smaller than the inner diameter of the upper connection hole 311. The outer diameter of the flange ring outer wall 61 on the flange ring 6 is smaller than the inner diameter of the lower connection hole 312. The diameter of the connecting rod of the connector 4 is smaller than the inner diameters of the flange ring inner hole 62 and the lower connection hole 312. The outer diameter of the connector end cap on the connector 4 is larger than the inner diameter of the flange ring inner hole 62. The outer diameter of the flange ring outer wall 61 is smaller than the lower connection hole 312. The outer diameter of the limiting end plate is larger than the outer diameter of the lower connection hole 312 and larger than the outer diameter of the connector end cap on the connector 4. There is a designed gap between the flange ring 6 and the lower connection hole 312, which facilitates the radial movement of the group 3 compared with the flange ring 6. The elastic member 7 is a compression spring, and its inner diameter is smaller than the inner diameter of the upper connecting hole 311 and larger than the inner diameter of the lower connecting hole 312 .

[0055] Preferably, the connecting rod is a threaded rod, the second connecting hole 21 is a threaded hole, the connecting rod and the second connecting hole 21 are fixedly connected by threads, the number of support arms 32 is three, and the three support arms 32 are evenly distributed on the outer surface of the group 3, and the three support arms form a triangular positioning, which effectively improves the stability of the group.

[0056] Preferably, a lens setting groove coaxially arranged with the group 3 is provided on the group 3. A claw engaging groove 33 is provided on the side of the support arm 32, and the claw engaging groove is arranged on the midline of the support arm 32. When the mechanical claw is used to adjust the coaxiality of the group 3, the mechanical claw is engaged with the claw engaging groove 33, so that the mechanical claw coincides with the geometric center of the group 3, thereby improving the adjustment efficiency of the group coaxiality. The claw engaging groove is arranged on the side of the support arm 32, and there is no requirement for the lens magnification and field of view angle, which reduces the difficulty of designing the centering equipment, and the centering can be performed according to the most sensitive optical magnification, reducing the difficulty of optical design.

[0057] Preferably, a glue dispensing groove 34 is provided on the end surface of the support arm 32 facing the fixed frame 2, and the glue dispensing groove is used for dispensing glue to fix the group after the focusing is completed.

[0058] Preferably, a through hole adapted to the group 3 is provided in the middle of the fixing frame 2. Since the connection member 4, the flange ring 6 and the elastic member 7 form a locking assembly, when the elastic member 7 installed in the first connection hole 31 retains a contraction length of 0.5mm-1mm, by setting the insertion thickness of the adjustment gasket 5 in the gasket groove 22, the adjustment gasket 5 squeezes the support arm 32, so that the group 3 has an axial tilt of 0.01°-0.1°, so as to achieve rapid adjustment of the parallelism of the group.

[0059] The above structure can simultaneously adjust the group coaxiality and parallelism. After the lens is assembled, the coaxiality and parallelism of the sensitive group are adjusted according to the situation of the entire optical system of the lens to achieve the best imaging position, so that the entire lens is close to the design value to achieve the original optical design goal, reduce the difficulty of processing and assembly processes, implement high-difficulty optical designs, and concentrate the eccentricity and tilt sensitive items in the optical system in one place, ultimately improving the optical performance of the product.

[0060] It should be noted that, in the present invention, the direction in which the adjusting gasket 5 is inserted into the gasket groove 22 is the transverse direction, and the direction perpendicular to the direction in which the adjusting gasket 5 is inserted into the gasket groove 22 is the longitudinal direction.

[0061] Preferably, the end surface of the adjusting gasket 5 that abuts against the fixed frame 2 and the end surface that abuts against the group 3 are both planes and parallel to each other. That is, the longitudinal section thereof is rectangular or parallelogram-shaped. By replacing the adjusting gasket 5 of different thicknesses, the tilt of the group 3 can be adjusted so that the tilt of the group 3 is compensated with the tilt of the lens, and the parallelism of the group can be quickly adjusted to meet the optical design performance requirements.

[0062] Preferably, the angle between the end face of the adjusting gasket 5 abutting against the fixed frame 2 and the end face thereof abutting against the group 3 is an acute angle, that is, the longitudinal section of the adjusting gasket 5 is triangular or trapezoidal. The angle between the end face of the adjusting gasket 5 abutting against the fixed frame 2 and the end face thereof abutting against the group 3 is an acute angle, and the angle between the end face of the adjusting gasket 5 abutting against the fixed frame 2 and the end face thereof abutting against the group 3 is fixed, and the insertion amount of the adjusting gasket 5 into the gasket slot 22 can be increased or decreased to squeeze the support arm 32, so that the group 3 can be tilted by 0.01°-0.1° in the axial direction, so as to realize rapid adjustment of the parallelism of the group.

[0063] Preferably, if Figure 6 As shown, the cross-section of the adjusting gasket 5 is T-shaped, including an insertion portion and a pull-out portion perpendicular to the insertion portion, the width of the insertion portion is adapted to the width of the gasket groove, and the width of the pull-out portion is greater than the width of the gasket groove. By arranging the pull-out portion on the adjusting gasket 5, it is convenient to adjust the insertion position of the adjusting gasket 5 or to pull out the gasket, thereby improving the adjustment efficiency of the parallelism of the group 3.

[0064] The above description is only one or several embodiments of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An adjustable group fixing device, characterized in that: include: A group (3) having a plurality of support arms (32) distributed along its circumference on its side; A fixed frame (2) is arranged on one side of the group (3); the fixed frame (2) is provided with a plurality of gasket grooves (22) corresponding to the support arms (32); a detachable adjustment gasket (5) is arranged in the gasket groove (22); two end surfaces of the adjustment gasket (5) are respectively against the fixed frame (2) and the group (3); A locking assembly for achieving axial locking and radial movement of the group (3) relative to the fixed frame (2), comprising a connecting fastener and an elastic member (7); the connecting fastener passes through the support arm (32) and is connected to the fixed frame (2), and the elastic member (7) is arranged between the connecting fastener and the group (3).

2. The adjustable group fixing device according to claim 1, characterized in that: Each of the support arms (32) is provided with a first connection hole (31), and a limiting boss protruding along the inner wall of the first connection hole (31) is provided in the first connection hole (31); The fixing frame (2) is provided with a plurality of second connection holes (21) corresponding one-to-one to the first connection holes (31); One end of the connecting fastener passes through the first connecting hole (31), is arranged in the second connecting hole (21), and is fixedly connected to the fixing frame (2) through the second connecting hole (21); a protruding limiting end plate (63) is provided on the outer side surface of the connecting fastener; and a designed gap is provided between the side surface of the connecting fastener and the inner wall of the first connecting hole (31); The elastic member (7) is sleeved on the connecting fastener and is arranged in the first connecting hole (31), and the two ends of the elastic member (7) respectively abut against the limiting end plate (63) and the limiting boss.

3. The adjustable group fixing device according to claim 2, characterized in that: The connecting fastener comprises a connecting piece (4) and a flange ring (6). The flange ring (6) is arranged in the first connecting hole (31), and its outer diameter is smaller than the inner diameter of the first connecting hole (31); the limiting end plate (63) is protrudingly arranged on the outer circumferential surface of the flange ring (6); The connecting member (4) comprises a connecting rod and a connecting member end cap; the flange ring (6) is provided with a flange ring inner hole (62); one end of the connecting rod passes through the flange ring inner hole (62) and the first connecting hole (31), is arranged in the second connecting hole (21), and is fixedly connected to the fixing frame (2) through the second connecting hole (21); the outer diameter of the connecting member end cap is larger than the inner diameter of the flange ring inner hole (62).

4. The adjustable group fixing device according to claim 3, characterized in that: The elastic member (7) is arranged in the first connecting hole (31) and sleeved on the flange ring (6). The two ends of the elastic member (7) respectively abut against the limiting end plate (63) and the limiting boss.

5. The adjustable group fixing device according to claim 3, characterized in that: The connecting rod is a threaded rod, the second connecting hole (21) is a threaded hole, and the connecting rod and the second connecting hole (21) are fixedly connected via threads.

6. The adjustable group fixing device according to claim 1, characterized in that: The group (3) is provided with a lens arrangement groove which is arranged coaxially with the group (3).

7. The adjustable group fixing device according to claim 3, characterized in that: The limiting boss divides the first connecting hole (31) into an upper connecting hole (311) and a lower connecting hole (312) which are connected to each other; the inner diameter of the upper connecting hole (311) is larger than the inner diameter of the lower connecting hole (312); the outer diameter of the elastic member (7) is larger than the inner diameter of the lower connecting hole (312) and smaller than the inner diameter of the upper connecting hole (311); and the outer diameter of the outer wall (61) of the upper flange ring of the flange ring (6) is smaller than the inner diameter of the lower connecting hole (312).

8. The adjustable group fixing device according to claim 1, characterized in that: The plurality of support arms (32) are evenly distributed on the outer side surface of the group (3) along its circumference.

9. The adjustable group fixing device according to claim 1, characterized in that: A claw engaging groove (33) is provided on the side surface of the support arm (32), and the claw engaging groove (33) is arranged on the center line of the support arm (32).

10. The adjustable group fixing device according to claim 1, characterized in that: A glue dispensing groove (34) is provided on the end surface of the support arm (32) facing the fixing frame (2).

11. The adjustable group fixing device according to claim 1, characterized in that: The end surface of the adjusting gasket (5) abutting against the fixing frame (2) and the end surface abutting against the group (3) are both planes and parallel to each other.

12. The adjustable group fixing device according to claim 1, characterized in that: The angle between the end surface of the adjusting gasket (5) abutting against the fixing frame (2) and the end surface thereof abutting against the group (3) is an acute angle.

13. The adjustable group fixing device according to claim 11 or 12, characterized in that: The cross section of the adjusting gasket (5) is T-shaped, comprising an insertion portion and a pull-out portion perpendicular to the insertion portion, the shape of the insertion portion is adapted to the shape of the gasket groove (22), and the width of the pull-out portion is greater than the width of the gasket groove (22).

14. A lens, characterized in that: It comprises a lens barrel (1), and also comprises an adjustable group fixing device as claimed in any one of claims 1 to 13.

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