Three-jaw clamp spectacle frame capable of adjusting load of optical lens

Abstract

The invention relates to the technical field of optical lens clamp spectacle frames, in particular to a three-jaw clamp spectacle frame capable of adjusting load of optical lenses. According to the technical scheme, the miniature three-jaw clamp comprises a miniature three-jaw clamp chuck, the miniature three-jaw clamp chuck comprises a chuck body with a round hole in the middle, three annular and uniform claws are slidably mounted on the end face of the chuck body, and polyurethane gaskets are mounted on the inner sides of the claws. A driving mechanism for driving the three claws to synchronously and radially move is arranged on the chuck body; the lens angle-adjustable lens bracket is used for mounting and supporting the micro three-jaw clamp chuck, the lens bracket comprises a three-jaw clamp fixing plate, and a chuck positioning groove and a chuck positioning hole communicated with the chuck positioning groove are formed in the three-jaw clamp fixing plate. According to the invention, through deep fusion of the self-centering symmetric clamping structure and optical adjustment requirements, a lens fixing solution which is more efficient, more reliable and higher in universality is provided for the field of precision optics.

Description

Technical Field

[0001] The present invention relates to the technical field of optical lens fixtures and frames, and in particular to a three-jaw fixture frame for adjustable loading of optical lenses. Background Art

[0002] The design of traditional optical lens frames usually relies on fixed apertures or rigid mechanical structures to fix the lenses. Their adjustment ability is limited, and it is difficult to meet the compatibility requirements of lenses with different curvature radii or diameters. Especially in precision optical systems, the optical axis alignment of the lens directly affects the imaging quality. However, traditional frames are prone to lens deviation due to mechanical tolerances or human operation during installation, and repeated calibration is required. In addition, most existing adjustable frames adopt threaded adjustment or snap structures. Such designs not only have limited adjustment accuracy but may also cause deformation of the lens surface due to uneven stress distribution. Especially in high-temperature or vibration environments, optical path deviation is likely to occur. Traditional three-jaw fixtures use a conical body to drive the jaws, and their axial length usually exceeds 50 mm, making it difficult to adapt to the compact space requirements of micro-optical devices (such as micro-spectrometers, fiber couplers). In addition, existing adjustment mechanisms rely on independent threaded or snap structures, resulting in separate operations for lens clamping and angle adjustment, with low efficiency. Therefore, this application proposes a three-jaw fixture frame for adjustable loading of optical lenses. Summary of the Invention

[0003] The object of the present invention is to address the problem in the background art that existing adjustment mechanisms rely on independent threaded or snap structures, resulting in separate operations for lens clamping and angle adjustment and low efficiency. A three-jaw fixture frame for adjustable loading of optical lenses is proposed.

[0004] The technical solution of the present invention: A three-jaw fixture frame for adjustable loading of optical lenses, comprising:

[0005] A micro three-jaw fixture chuck, the micro three-jaw fixture chuck includes a chuck body with a circular hole in the middle. Three jaw hands are slidably installed on the end face of the chuck body and are evenly distributed in a circular shape. A polyurethane gasket is installed on the inner side of the jaw hands, and a driving mechanism for driving the three jaw hands to move radially synchronously is provided on the chuck body;

[0006] A frame for installing and supporting the micro three-jaw fixture chuck with adjustable lens angle, the frame includes a three-jaw fixture fixing plate. A chuck positioning groove and a chuck positioning hole communicating with the chuck positioning groove are provided on the three-jaw fixture fixing plate, and the micro three-jaw fixture chuck is fixedly installed in the chuck positioning groove.

[0007] Optionally, the driving mechanism includes a large bevel gear rotatably installed within the chuck body. Three small bevel gears meshing with the large bevel gear are rotatably installed within the curved surface of the chuck body. A planar thread is fixed to the side of the large bevel gear away from the small bevel gears. The bottom of the jaw is provided with reverse teeth meshing with the planar thread. The planar thread and the reverse teeth cooperate to enable the radial movement of the jaw. A knob drivingly connected to the small bevel gear is rotatably installed on the curved surface of the chuck body.

[0008] Optionally, an external wrench is rotatably installed on the three-jaw fixture fixing plate. One end of the external wrench is fixedly connected to one of the small bevel gears.

[0009] Optionally, the spectacle frame further includes a fixed base fixedly connected to the bottom of the three-jaw fixture fixing plate. A spectacle frame fixing plate is provided on one side of the three-jaw fixture fixing plate and is located above the fixed base. The spectacle frame fixing plate is hinged to the fixed base through a universal ball head. A plurality of pre-tightening springs are installed between the fixed base and the spectacle frame fixing plate. A plurality of positioning holes are distributed along an arc line centered on the chuck positioning hole. Adjusting screws are threadedly installed at both ends of the spectacle frame fixing plate. One end of each adjusting screw abuts against the fixed base.

[0010] Optionally, the spectacle frame fixing plate and the fixed base are provided with correspondingly arranged positioning holes. A placement groove is provided in the positioning hole. A spring fixing rod is placed in the placement groove. Both ends of the positioning hole are hooked on the spring fixing rod.

[0011] Optionally, the spectacle frame fixing plate is provided with an arc surface centered on the chuck positioning hole. A base positioning hole is provided in the arc surface.

[0012] Optionally, one end of the adjusting screw close to the fixed base is provided in a hemispherical shape. The curved surface of the other end of the adjusting screw away from the fixed base is provided with anti-slip lines.

[0013] Optionally, a fastening bolt is threadedly installed at the top of the three-jaw fixture fixing plate. One end of the fastening bolt extends into the chuck positioning groove and is bolted to the chuck body.

[0014] Compared with the prior art, the present application includes at least one of the following beneficial technical effects:

[0015] Based on the three-jaw synchronous clamping principle, the inherent defect of traditional spectacle frames relying on manual calibration is eliminated, the automatic coincidence of the optical axis of the lens and the mechanical reference axis is achieved, and the assembly and adjustment accuracy and efficiency of the optical system are significantly improved; the limitation of the traditional spectacle frame fixed aperture or discrete positioning mode is broken through, and through a continuously adjustable clamping structure, a wide adaptation to lenses of different sizes and curvatures is realized, and the need for spectacle frame replacement during the reconstruction of the optical system is greatly reduced.

[0016] Through the profiling design of the contact surface and the flexible stress dispersion mechanism, the clamping force is evenly transmitted to the non-optical area of the lens, avoiding local deformation or optical surface damage caused by traditional rigid clamping, and ensuring the stability of the lens performance;

[0017] The driving and locking functions are highly integrated into the lens holder body. While maintaining high adjustment accuracy, it overcomes the drawback of the large volume of the traditional three-jaw mechanism, significantly expanding its application scenarios in miniaturized and high-density optical devices;

[0018] Through the strengthening of structural rigidity and the anti-interference locking strategy, the clamping offset under complex working conditions such as temperature changes and mechanical vibrations is effectively suppressed, ensuring the long-term stability of the optical path.

[0019] Through the deep integration of the self-centering symmetric clamping structure and the optical alignment requirements, the present invention provides a more efficient, reliable and more universal lens fixing solution for the field of precision optics. Description of the Drawings

[0020] Figure 1 It is a three-dimensional structure schematic diagram of a three-jaw fixture lens holder for an adjustable-load optical lens;

[0021] Figure 2 It is a structural schematic diagram of the chuck positioning groove of a three-jaw fixture lens holder for an adjustable-load optical lens;

[0022] Figure 3 It is a schematic diagram of a planar thread structure;

[0023] Figure 4 It is a structural schematic diagram of the meshing of a small bevel gear and a large bevel gear;

[0024] Figure 5 It is a schematic diagram of the disassembled structure of a micro three-jaw fixture chuck Figure 1 ;

[0025] Figure 6 It is a schematic diagram of the disassembled structure of a micro three-jaw fixture chuck Figure 2 ;

[0026] Figure 7 It is a schematic diagram of the disassembled structure of the lens holder;

[0027] Figure 8 It is a side view structural schematic diagram of a three-jaw fixture lens holder for an adjustable-load optical lens.

[0028] Reference numerals: 100, micro three-jaw chuck; 110, external wrench; 120, chuck body; 121, small bevel gear; 122, large bevel gear; 123, flat thread; 124, knob; 125, back teeth; 130, jaw; 140, polyurethane gasket; 200, spectacle frame; 210, fixed base; 220, spectacle frame fixing plate; 221, adjusting screw; 222, positioning hole; 223, base positioning hole; 230, three-jaw chuck fixing plate; 231, chuck positioning groove; 232, chuck positioning hole; 233, fastening bolt; 241, preloading spring; 251, universal ball head. Detailed implementation manners

[0029] The technical solutions of the present disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some but not all of the embodiments of the present disclosure.

[0030] The components of the embodiments of the present disclosure usually described and shown in the accompanying drawings herein can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present disclosure provided in the accompanying drawings is not intended to limit the scope of the claimed present disclosure, but merely represents the selected embodiments of the present disclosure.

[0031] All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present disclosure without creative efforts shall fall within the scope of protection of the present disclosure.

[0032] In the description of the present disclosure, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present disclosure and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present disclosure. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0033] In the description of the present disclosure, it should be noted that unless otherwise clearly specified and limited, the terms "mounted", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present disclosure can be understood according to specific situations.

[0034] Embodiment

[0035] AsFigure 1 As shown, the present invention proposes a three-jaw fixture frame for adjusting the optical lens, including a miniature three-jaw fixture chuck 100, which includes a chuck body 120 with a circular hole in the middle, and three claws 130 with uniform annular parts are slidably installed on the end surface of the chuck body 120. A polyurethane gasket 140 is installed on the inner side of the claw 130. The surface of the polyurethane gasket 140 is designed with a micron-level contoured texture (roughness Ra ≤ 0.8μm). When clamping lenses with different curvatures, elastic deformation is used to achieve uniform stress distribution on the contact surface, and the local pressure is reduced by 60%. The surface of the polyurethane gasket 140 is designed with a micro-texture to increase friction. The material has moderate elasticity, which can not only stably clamp the lens, but also adapt to the surfaces of lenses with different curvatures.

[0036] like Figures 3 - 6 As shown, in this embodiment, the chuck body 120 is provided with a drive mechanism that drives the three claw hands 130 to move synchronously in the radial direction. The drive mechanism includes a large bevel gear 122 rotatably mounted within the chuck body 120. Three small bevel gears 121 are rotatably mounted within the curved surface of the chuck body 120, meshing with the large bevel gear 122. A flat thread 123 is fixed to the side of the large bevel gear 122 away from the small bevel gears 121. The bottom of the claw hand 130 is provided with back teeth 125 that mesh with the flat thread 123. The flat thread 123 and the back teeth 125 cooperate to enable the radial movement of the claw hand 130. A knob 124 is rotatably mounted on the curved surface of the chuck body 120, which is transmission-connected to the small bevel gears 121. By rotating the small bevel gear 121, the large bevel gear 122 rotates, causing the flat thread 123 and the back teeth 125 to slide, thereby moving the claw hand 130, and thus bringing the three claw hands 130 closer together for clamping.

[0037] Among them, an external wrench 110 is rotatably installed on the three-jaw clamp fixing plate 230, and one end of the external wrench 110 is fixedly connected to one of the small bevel gears 121. By manually rotating the external wrench 110, the small bevel gear 121 is driven to rotate, which is easy to operate. The end of the external wrench 110 is designed with an anti-slip texture to enhance the operating feel.

[0038] like Figures 1 - 2As shown, in this embodiment, it is also used to install a lens holder 200 with an adjustable lens angle for supporting the micro three-jaw chuck 100. The lens holder 200 includes a three-jaw chuck fixing plate 230. A chuck positioning groove 231 and a chuck positioning hole 232 communicating with the chuck positioning groove 231 are provided on the three-jaw chuck fixing plate 230. The micro three-jaw chuck 100 is fixedly installed in the chuck positioning groove 231. A fastening bolt 233 is threadedly installed at the top of the three-jaw chuck fixing plate 230. One end of the fastening bolt 233 extends into the chuck positioning groove 231 and is bolted to the chuck body 120. The chuck body 120 is placed into the chuck positioning groove 231 and the fastening bolt 233 is rotated to connect with the chuck body 120, realizing the installation and fixation of the chuck body 120 and preventing displacement and deviation during the adjustment process.

[0039] As Figures 7 - 8 shown, the lens holder 200 further includes a fixed base 210 fixed to the bottom of the three-jaw chuck fixing plate 230. As the support base of the entire lens holder 200, a lens holder fixing plate 220 is provided on one side of the three-jaw chuck fixing plate 230 above the fixed base 210. The lens holder fixing plate 220 is hinged to the three-jaw chuck fixing plate 230 through a universal ball head 251. A plurality of pre-tightening springs 241 are installed between the three-jaw chuck fixing plate 230 and the lens holder fixing plate 220. A plurality of positioning holes 222 are distributed along an arc line with the chuck positioning hole 232 as the center of the circle. Adjusting screws 221 are threadedly installed at both ends of the lens holder fixing plate 220. One end of the adjusting screw 221 abuts against the three-jaw chuck fixing plate 230. By rotating the adjusting screw 221 and moving to control the lens holder fixing plate 220 and the three-jaw chuck fixing plate 230 to move away from or close to each other, different angle adjustments of the lens holder fixing plate 220 can be controlled. At the same time, the radial movement of the adjusting jaw 130 is synchronized with the tilt angle of the lens to achieve automatic optical axis alignment (offset ≤ 0.01 mm), improving the installation and adjustment efficiency.

[0040] It should be noted that one end of the adjusting screw 221 close to the three-jaw chuck fixing plate 230 is provided with a hemispherical shape. The hemispherical shape is used to ensure a small contact area when abutting against the three-jaw chuck fixing plate 230, guaranteeing the accuracy of the adjustment. The end of the adjusting screw 221 far from the three-jaw chuck fixing plate 230 is provided with anti-slip lines on its curved surface. The anti-slip lines are used to improve the operation feel.

[0041] As Figure 7 shown, among them, corresponding positioning holes 222 are provided on the lens holder fixing plate 220 and the three-jaw chuck fixing plate 230. A placing groove is provided in the positioning hole 222. A spring fixing rod is placed in the placing groove. Both ends of the positioning hole 222 are hooked on the spring fixing rod to realize the installation of the pre-tightening spring 241.

[0042] In addition, an arc surface centered on the chuck positioning hole 232 is provided on the lens frame fixing plate 220, and a base positioning hole 223 is formed on the arc surface. The base positioning hole 223 is used for precise alignment with the fixed base 210 to ensure assembly consistency.

[0043] When this embodiment is in use, manually rotate the external wrench 110 to drive the rotation of the small bevel gear 121. By rotating the small bevel gear 121, the large bevel gear 122 is driven to rotate, causing sliding between the planar thread 123 and the back teeth 125, realizing the movement of the jaw 130, and thus enabling the three jaws 130 to move closer to each other for clamping; eliminating the inherent defect of the traditional lens frame relying on manual calibration, realizing the automatic coincidence of the optical axis of the lens and the mechanical reference axis, and significantly improving the alignment accuracy and efficiency of the optical system; breaking through the limitations of the traditional lens frame fixed aperture or discrete positioning mode, through a continuously adjustable clamping structure, achieving a wide adaptation to lenses of different sizes and curvatures, and greatly reducing the need for lens frame replacement during the reconstruction of the optical system. Rotate the adjusting screw 221 and move to control the lens frame fixing plate 220 and the three-jaw fixture fixing plate 230 to move away from or closer to each other, thereby controlling the adjustment of different angles of the lens frame fixing plate 220. At the same time, adjust the radial movement of the jaw 130 to synchronously adjust the tilt angle of the lens, realizing automatic optical axis centering and improving the alignment efficiency. Through the deep integration of the self-centering symmetric clamping structure and the optical alignment requirements, a more efficient, reliable and more universal lens fixing solution is provided for the field of precision optics.

[0044] The above specific embodiments are only several alternative embodiments of the present invention. Based on the technical solution of the present invention and the relevant revelations of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments.

Claims

1. A three-jaw fixture mirror frame for an adjustable load optical lens, characterized in that, include: A micro three-jaw fixture chuck (100), comprising a chuck body (120) with a circular hole in the middle, three claws (130) with uniform annular portions being slidably mounted on the end surface of the chuck body (120), a polyurethane gasket (140) being mounted on the inner side of the claws (130), and a driving mechanism for driving the three claws (130) to move synchronously in radial direction being provided on the chuck body (120); A mirror frame (200) for mounting and supporting a micro three-jaw fixture chuck (100) with an adjustable lens angle, the mirror frame (200) comprising a three-jaw fixture fixing plate (230), the three-jaw fixture fixing plate (230) being provided with a chuck positioning groove (231) and a chuck positioning hole (232) communicating with the chuck positioning groove (231), the micro three-jaw fixture chuck (100) being fixedly mounted in the chuck positioning groove (231).

2. The three-jaw fixture mirror frame of an adjustable-load optical lens according to claim 1, wherein, The driving mechanism includes a large bevel gear (122) rotatably mounted in the chuck body (120), three small bevel gears (121) meshing with the large bevel gear (122) are rotatably mounted in the curved surface of the chuck body (120), a plane thread (123) is fixed on the side of the large bevel gear (122) away from the small bevel gears (121), a bottom of the claw hand (130) is provided with back teeth (125) meshing with the plane thread (123), the plane thread (123) and the back teeth (125) cooperate for radial movement of the claw hand (130), and a knob (124) in transmission connection with the small bevel gears (121) is rotatably mounted on the curved surface of the chuck body (120).

3. The three-jaw fixture frame of an adjustable load optical lens according to claim 2, characterized in that, An external wrench (110) is rotatably mounted on the three-jaw fixture fixing plate (230), and one end of the external wrench (110) is fixedly connected to one of the small bevel gears (121).

4. The three-jaw fixture lens frame of an adjustable-load optical lens according to claim 1, characterized in that, The mirror frame (200) further comprises a fixed base (210) fixed to the bottom of the three-jaw clamp fixing plate (230); a mirror frame fixing plate (220) located above the fixed base (210) is provided on one side of the three-jaw clamp fixing plate (230); the mirror frame fixing plate (220) is hinged to the three-jaw clamp fixing plate (230) via a universal ball head (251); a plurality of preload springs (241) are installed between the three-jaw clamp fixing plate (230) and the mirror frame fixing plate (220); a plurality of positioning holes (222) are distributed along an arc line with the chuck positioning hole (232) as the center; adjusting screws (221) are threadedly installed at both ends of the mirror frame fixing plate (220); one end of the adjusting screw (221) abuts against the three-jaw clamp fixing plate (230).

5. The three-jaw fixture mirror frame of an adjustable load optical lens according to claim 4, characterized in that, The frame fixing plate (220) and the three-claw fixture fixing plate (230) are provided with corresponding positioning holes (222), the positioning holes (222) are provided with placement grooves, a spring fixing rod is placed in the placement groove, and both ends of the positioning holes (222) are hooked on the spring fixing rod.

6. The three-jaw fixture frame of an adjustable-load optical lens according to claim 5, characterized in that, The mirror frame fixing plate (220) is provided with an arcuate surface with the chuck positioning hole (232) as the center, and a base positioning hole (223) is provided on the arcuate surface.

7. The three-jaw fixture mirror frame of an adjustable-load optical lens according to claim 4, characterized in that, One end of the adjusting screw rod (221) close to the three-jaw fixture fixing plate (230) is arranged in a hemispherical shape, and an anti-slip pattern is arranged on the curved surface at the end of the adjusting screw rod (221) away from the three-jaw fixture fixing plate (230).

8. The three-jaw fixture mirror frame of an adjustable load optical lens according to claim 1, characterized in that, A fastening bolt (233) is threadedly installed at the top of the three-jaw fixture fixing plate (230), and one end of the fastening bolt (233) extends into the chuck positioning groove (231) and is bolted to the chuck body (120).

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