Center distance adjustable device for centering processing of lens group

Abstract

The utility model relates to a device for centering machining of a lens group, in particular to a center distance adjustable device for centering machining of the lens group, and aims to solve the problems that in the prior art, the lens group is directly fixed on a tool through a screw, the tool needs to be continuously replaced when batch centering machining is carried out within a certain range of the center distance of flange holes, and the machining cost is high. The technical problems of high production cost and low efficiency in the prior art are solved, and the imaging quality of an optical system is reduced due to the fact that the surface type of lenses in a lens group is easy to deteriorate. The device comprises a flat plate, wherein N sliding rails are uniformly distributed on the front surface of the flat plate around the axis; n > = 3; each sliding rail extends in the radial direction of the flat plate, and a sliding block is assembled on each sliding rail; h process threaded holes are formed in the front face of the sliding block, H is larger than or equal to 2, the H process threaded holes are formed in the sliding direction of the sliding block at intervals, and the hole diameters of the H process threaded holes are sequentially increased in the direction away from the axis of the flat plate. The central axis of the process threaded hole is parallel to the axis of the flat plate.

Description

TECHNICAL FIELD

[0001] The utility model relates to a device for lens group centering machining, concretely relates to an adjustable center distance device for lens group centering machining. BACKGROUND

[0002] At present, in the lens group centering machining process of the optical engineering field, a fixed center distance tooling is generally adopted, and the lens group is directly fixed on the tooling through screws.

[0003] However, the flange hole center distances of different lens groups are generally different, therefore, in order to fix the lens groups with different flange hole center distances, multiple toolings need to be prepared, and then when batch centering machining is carried out within a certain range of flange hole center distance (for example, within a range of Φ20mm~Φ100mm), the tooling needs to be replaced constantly, which causes high production cost and low efficiency.

[0004] In addition, the lens group is directly fixed on the tooling through screws, which easily causes the lens surface type in the lens group to be poor, and causes the imaging quality of the optical system to be poor. UTILITY MODEL CONTENTS

[0005] The utility model discloses a kind of adjustable center distance devices for lens group centering machining, to solve the technical problem in prior art, lens group is directly fixed on tooling through screw, when batch centering machining is carried out within a certain range of flange hole center distance, the tooling needs to be replaced constantly, which causes high production cost and low efficiency phenomenon, and easily causes the lens surface type in the lens group to be poor, and causes the imaging quality of the optical system to be poor.

[0006] To achieve the above object, the technical scheme that the utility model adopts is as follows:

[0007] A kind of adjustable center distance device for lens group centering machining, it is special in that:

[0008] It includes flat disc, and N number of slide rails are evenly arranged on the front surface of the flat disc around the axis of the flat disc;N is positive integer and N≥3;

[0009] Each slide rail extends along the radial direction of the flat disc, and a sliding block is fitted on each slide rail;

[0010] 1 process thread hole is arranged on the front surface of the sliding block, or H process thread holes are arranged on the front surface of the sliding block, H is positive integer and H≥2, H process thread holes are spaced apart along the sliding direction of the sliding block, and the hole diameter of H process thread holes increases in turn along the direction away from the axis of the flat disc;

[0011] The central axis of process thread hole is parallel to the axis of the flat disc.

[0012] Further, the slide rail is a groove provided on the front surface of the flat disc along the radial direction of the flat disc, and the sliding block is slidingly arranged in the corresponding groove; the cross-sectional shape of the groove perpendicular to the radial direction of the flat disc is a reverse T-shaped structure, and correspondingly, the cross-sectional shape of the sliding block perpendicular to the length direction of the sliding block is a reverse T-shaped structure; the front surface of the sliding block is lower than the front surface of the flat disc.

[0013] Further, the slide rail is a groove provided on the front surface of the flat disc along the radial direction of the flat disc, and the sliding block is slidingly arranged in the corresponding groove; the cross-sectional shape of the groove perpendicular to the radial direction of the flat disc is a reverse T-shaped structure, and correspondingly, the cross-sectional shape of the sliding block perpendicular to the length direction of the sliding block is a reverse T-shaped structure; the front surface of the sliding block is lower than the front surface of the flat disc.

[0014] Further, on the sliding block, a horizontal direction flexible hinge is arranged at the outer periphery of the process thread hole; the horizontal direction flexible hinge comprises K first arc-shaped grooves and K second arc-shaped grooves; K is a positive integer and K≥2; the K first arc-shaped grooves and the K second arc-shaped grooves are uniformly arranged around the central axis of the process thread hole, and the K second arc-shaped grooves are located on the outer side of the K first arc-shaped grooves; a small beam formed between the adjacent ends of two adjacent first arc-shaped grooves is located on the inner side of a second arc-shaped groove, and the small beam is located at the middle position of the second arc-shaped groove.

[0015] Further, the central axis of the second arc-shaped groove and the central axis of the first arc-shaped groove are coaxial with the central axis of the process thread hole; K is equal to 3.

[0016] Further, the depth of the first arc-shaped groove and the depth of the second arc-shaped groove are both greater than or equal to the depth of the process thread hole.

[0017] Further, on the sliding block, a flexible support structure is arranged on the vertical section of the reverse T-shaped structure; the flexible support structure comprises a flat hole, and the flat hole penetrates through both sides of the sliding block along the width direction of the sliding block; the flexible support structure further comprises a pair of openings, and the pair of openings are respectively arranged on both sides of the sliding block along the length direction of the sliding block, and the openings are located on the side close to the front surface of the sliding block and extend along the length direction of the sliding block; each opening penetrates through both sides of the sliding block along the width direction of the sliding block, and along the length direction of the sliding block, the inner end of each opening is located on the inner side of the outer end of the flat hole, so that the distance between the inner ends of the pair of openings is less than the size of the flat hole along the length direction of the sliding block.

[0018] Further, along the height direction of the sliding block, the distance between the surface close to the front surface of the sliding block and the front surface of the sliding block is greater than the depth of the process thread hole; the inner ends of the pair of openings are both rounded, and the two ends of the flat hole along the length direction of the sliding block are both rounded.

[0019] Further, the sliding block is made of brass.

[0020] Further, the center of the flat disc is provided with a through hole; N is equal to 4, H is greater than or equal to 2, in the radial direction of the flat disc, the distance L1 between the central axes of the two process threaded holes with the smallest hole diameter is greater than or equal to 20mm, and the distance L2 between the central axes of the two process threaded holes with the largest hole diameter is less than or equal to 100mm; the size specification of the process threaded hole is M2.5mm-M6mm. The lens group batch centering in the range of the diameter of the flange hole being Φ3mm-Φ6.5mm and the center distance of the flange hole being Φ20mm-Φ100mm can be met.

[0021] The beneficial effects of the utility model compared with the prior art are:

[0022] 1. The adjustable center distance device for lens group centering machining of the utility model can quickly adapt to the installation requirements of lens groups with different flange hole center distances through the movement of the sliding block, complete lens group batch centering of different apertures, reduce production cost, improve production efficiency, and the operation is convenient and fast.

[0023] 2. The sliding block is made of brass material, the brass material has self-lubricating properties, good plasticity and toughness, can make the sliding of the sliding block smoother, and can absorb part of the assembly stress, the adjustable center distance device for lens group centering machining of the utility model can effectively eliminate screw assembly stress through the horizontal direction flexible hinge and flexible support structure, reduce vibration transmission, prevent lens deformation and loosening, has good processability, can effectively guarantee the performance index of the optical system, and improve product quality. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is a structure schematic view of an embodiment of the adjustable center distance device for lens group centering machining of the utility model;

[0025] Figure 2 It is a schematic view of the embodiment of the adjustable center distance device for lens group centering machining of the utility model when installing the lens group;

[0026] Figure 3 It is a structure schematic view of the flat disc in the embodiment of the adjustable center distance device for lens group centering machining of the utility model;

[0027] Figure 4 It is a structure schematic view of the sliding block in the embodiment of the adjustable center distance device for lens group centering machining of the utility model;

[0028] Figure 5 It is a sectional structure schematic view of the sliding block in the embodiment of the adjustable center distance device for lens group centering machining of the utility model;

[0029] Figure 6The embodiment of the adjustable center distance device for the lens group centering machining is a center distance adjustable schematic view.

[0030] The reference signs are explained as follows:

[0031] 1-flat disc, 1-1-slideway, 1-2-mounting threaded hole, 1-3-counterbore, 1-4-through hole, 2-slid, 2-1-technological threaded hole, 2-2-horizontal direction flexible hinge, 2-2-1-first arc-shaped groove, 2-2-2-second arc-shaped groove, 2-2-3-small beam, 2-3-flexible support structure, 2-3-1-opening, 2-3-2-flat hole, 3-anti-dropping piece, 4-lens group, 4-1-flange hole. DETAILED DESCRIPTION

[0032] In order to make the purpose, advantages and characteristics of the utility model more clear, the following will combine with the drawings and specific embodiment to make further detailed description on the adjustable center distance device for the lens group centering machining.

[0033] In the description of the utility model, it needs to be explained that, unless there is explicit provision and limitation, the term "mounting" should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integrally connected, it can be directly connected, or indirectly connected through intermediate medium. For ordinary skilled in the art, the specific meaning of the above-mentioned term in the utility model can be understood according to specific circumstances.

[0034] In the description of the utility model, it needs to be explained that, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0035] As shown in Figure 1 and Figure 2 The utility model discloses an adjustable center distance device for the lens group centering machining, including flat disc 1, as shown in Figure 3 The utility model discloses an adjustable center distance device for the lens group centering machining, including flat disc 1, as shown in Figure 1 and Figure 4As shown in the drawings, each groove is fitted with a sliding block 2 made of brass, the cross-sectional shape of the groove perpendicular to the radial direction of the flat disc 1 is a reverse T-shaped structure, and the cross-sectional shape of the sliding block 2 perpendicular to the length direction of the sliding block 2 is also a reverse T-shaped structure. The front surface of the sliding block 2 is provided with H process threaded holes 2-1, the central axis of the process threaded hole 2-1 is parallel to the axis A of the flat disc 1, and specifically, H is equal to 3. The three process threaded holes 2-1 are arranged at intervals along the sliding direction of the sliding block 2, and the hole diameters of the three process threaded holes 2-1 increase in turn in the direction away from the axis A of the flat disc 1, as shown in the drawings. Figure 2 As shown in the drawings, the front surface of the sliding block 2 is lower than the front surface of the flat disc 1. After the screw is tightened through the flange hole 4-1 on the lens group 4 and the process threaded hole 2-1, the relative position between the sliding block 2 and the corresponding sliding rail 1-1 can be fixed by using friction.

[0036] As shown in the drawings, Figure 4 and Figure 6 In the radial direction of the flat disc 1, the distance L1 between the central axes of the two process threaded holes 2-1 with the smallest hole diameter is greater than or equal to 20 mm, the distance L2 between the central axes of the two process threaded holes 2-1 with the largest hole diameter is less than or equal to 100 mm, and the size specification of the process threaded hole 2-1 is M2.5 mm to M6 mm. It can meet the centering of all lens groups in the range of Φ3 mm to Φ6.5 mm in diameter of the flange hole 4-1 and Φ20 mm to Φ100 mm in center distance of the flange hole. For example, the size specifications of the three process threaded holes 2-1 on the sliding block 2 in the direction away from the axis A of the flat disc 1 are M2.5 mm, M4 mm and M6 mm in turn.

[0037] As shown in the drawings, Figure 1 and Figure 3 Each sliding rail 1-1 is provided with an anti-falling piece 3 at both ends in the radial direction of the flat disc 1, and the anti-falling piece 3 is used to prevent the sliding block 2 from falling off the corresponding sliding rail 1-1. Specifically, the anti-falling piece 3 is a screw, and the groove is provided with a mounting threaded hole 1-2 at both ends in the radial direction of the flat disc 1, and the anti-falling piece 3 is mounted in the mounting threaded hole 1-2.

[0038] As shown in the drawings, Figure 4 and Figure 5As shown, a horizontal direction flexible hinge 2-2 is arranged on the slider 2 at the outer periphery of the process threaded hole 2-1; the horizontal direction flexible hinge 2-2 comprises K first arc-shaped grooves 2-2-1 and K second arc-shaped grooves 2-2-2, specifically, K is equal to 3, the 3 first arc-shaped grooves 2-2-1 and the 3 second arc-shaped grooves 2-2-2 are evenly arranged around the central axis of the process threaded hole 2-1, the 3 second arc-shaped grooves 2-2-2 are located outside the 3 first arc-shaped grooves 2-2-1, the central axis of the second arc-shaped groove 2-2-2 and the central axis of the first arc-shaped groove 2-2-1 are coaxial with the central axis of the process threaded hole 2-1, the small beam 2-2-3 formed between the adjacent ends of the two adjacent first arc-shaped grooves 2-2-1 is located inside one second arc-shaped groove 2-2-2, and the small beam 2-2-3 is located at the middle position of the second arc-shaped groove 2-2-2, the depth of the first arc-shaped groove 2-2-1 and the depth of the second arc-shaped groove 2-2-2 are both greater than or equal to the depth of the process threaded hole 2-1, and the plurality of first arc-shaped grooves 2-2-1 and the second arc-shaped grooves 2-2-2 have good structural strength.

[0039] As shown in Figure 4 and Figure 5 , the slider 2 is provided with a flexible support structure 2-3 on the vertical section of the inverted T-shaped structure, the flexible support structure 2-3 comprises a flat hole 2-3-2 and a pair of openings 2-3-1, the flat hole 2-3-2 penetrates through both sides of the slider 2 along the width direction of the slider 2, the pair of openings 2-3-1 are symmetrically arranged on both sides of the slider 2 along the length direction of the slider 2, and the pair of openings 2-3-1 are both located on the side of the flat hole 2-3-2 close to the front surface of the slider 2, the pair of openings 2-3-1 both extend along the length direction of the slider 2, and each opening 2-3-1 penetrates through both sides of the slider 2 along the width direction of the slider 2, along the length direction of the slider 2, the inner end of each opening 2-3-1 is located inside the outer end of the flat hole 2-3-2, so that the distance between the inner ends of the pair of openings 2-3-1 is less than the size of the flat hole 2-3-2 along the length direction of the slider 2; the inner end of the pair of openings 2-3-1 is rounded, and the two ends of the flat hole 2-3-2 along the length direction of the slider 2 are rounded; along the height direction of the slider 2, the distance between the surface of the opening 2-3-1 close to the front surface of the slider 2 and the front surface of the slider 2 is greater than the depth of the process threaded hole 2-1, so that the slider 2 has good structural strength.

[0040] As shown in Figure 2As shown, when fixing the lens group 4 on the adjustable center distance device for lens group centering machining of the embodiment, first, the positions of the four sliders 2 are adjusted according to the center distance of the flange hole on the lens group 4 to be fixed and the aperture of the flange hole 4-1, then the lens group 4 is placed on the front surface of the flat disc 1, and then four screws are respectively connected through the four flange holes 4-1 and the process thread holes 2-1 of the four sliders 2, so that the lens group 4 is fixed on the adjustable center distance device for lens group centering machining of the embodiment.

[0041] The adjustable center distance device for lens group centering machining of the embodiment can quickly adapt to the installation requirements of lens groups with different center distances of flange holes (range: Φ20mm-Φ100mm) by moving the sliders 2, complete batch centering of lens groups with different apertures, reduce production cost, improve production efficiency, and is convenient and fast to operate; the sliders 2 are made of brass material, which has self-lubricating properties and good plasticity and toughness, can make the sliding of the sliders 2 more smooth, and can absorb part of the assembly stress, in addition, the adjustable center distance device for lens group centering machining of the embodiment can eliminate screw assembly stress through the horizontal flexible hinge 2-2 and the flexible support structure 2-3, prevent lens deformation, and also reduce lens loosening caused by transmission of lathe vibration to the lens group 4, has good processability, can effectively ensure the performance index of the optical system, and improve product quality.

[0042] The number and position of the sliding rails 1-1 can be adjusted according to the number and position of the flange holes 4-1 on the lens group 4, and in other embodiments, the value of N can also be 3, 5, 6, 7, etc.

[0043] In other embodiments, the center of the flat disc 1 can also not be provided with the through hole 1-4; in other embodiments, only one process thread hole 2-1 can be provided on the front surface of the slider 2; in other embodiments, the value of K can also be 2, 4, 5, 6, etc.

[0044] In other embodiments, the size of the flat disc 1, the size of the slider 2, the number of process thread holes 2-1 on the slider 2, and the size specification of the process thread holes 2-1 can be adjusted according to the center distance of the flange hole on the lens group 4 and the size specification of the flange hole 4-1; for example, the value of H can also be 2, 4, 5, 6, etc.; for example, in the radial direction of the flat disc 1, the minimum value of the distance L1 between the central axes of the two process thread holes 2-1 with the smallest aperture can also be 19mm, 18mm, 17.5mm, 17mm, etc.; for example, in the radial direction of the flat disc 1, the maximum value of the distance L2 between the central axes of the two process thread holes 2-1 with the largest aperture can also be 150mm, 180mm, 200mm, 230mm, etc.; for example, the size specification of the process thread hole 2-1 can also be M1.6mm, M2mm, M5mm, M8mm, etc.

[0045] Finally, it should be noted that the above examples are intended to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that they can still modify the specific technical solutions recorded in the foregoing examples, or make equivalent substitutions for part or all of the technical features; and these modifications or substitutions do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the present application.

Claims

1. An adjustable center distance device for lens group centering machining, characterized in that: comprising a flat disc (1), a plurality of sliding rails (1-1) are arranged on the front surface of the flat disc (1) around the axis (A) of the flat disc (1); N is a positive integer and N≥3; each of the sliding rails (1-1) extends in the radial direction of the flat disc (1), and a sliding block (2) is arranged on each of the sliding rails (1-1); a process threaded hole (2-1) is arranged on the front surface of the sliding block (2), or H process threaded holes (2-1) are arranged on the front surface of the sliding block (2), H is a positive integer and H≥2, the H process threaded holes (2-1) are arranged at intervals in the sliding direction of the sliding block (2), and the hole diameters of the H process threaded holes (2-1) increase in turn in the direction away from the axis (A) of the flat disc (1); the central axis of the process threaded hole (2-1) is parallel to the axis (A) of the flat disc (1).

2. The adjustable center distance device for lens group centering machining according to claim 1, characterized in that: the sliding rails (1-1) are grooves arranged on the front surface of the flat disc (1) in the radial direction of the flat disc (1), and the sliding blocks (2) are slidingly arranged in the corresponding grooves; the cross-sectional shape of the groove perpendicular to the radial direction of the flat disc (1) is a reverse T-shaped structure, and correspondingly, the cross-sectional shape of the sliding block (2) perpendicular to the length direction of the sliding block (2) is a reverse T-shaped structure; the front surface of the sliding block (2) is lower than the front surface of the flat disc (1).

3. The adjustable center distance device for lens group centering machining according to claim 2, characterized in that: a anti-falling piece (3) is arranged at both ends of each of the sliding rails (1-1) in the radial direction of the flat disc (1), and the anti-falling piece (3) is used to prevent the sliding block (2) from falling off from the corresponding sliding rail (1-1).

4. The adjustable center distance device for lens group centering machining according to claim 2, characterized in that: a horizontal flexible hinge (2-2) is arranged on the sliding block (2) at the outer periphery of the process threaded hole (2-1); the horizontal flexible hinge (2-2) comprises K first arc-shaped grooves (2-2-1) and K second arc-shaped grooves (2-2-2); K is a positive integer and K≥2; K first arc-shaped grooves (2-2-1) and K second arc-shaped grooves (2-2-2) are uniformly arranged around the central axis of the process threaded hole (2-1), and K second arc-shaped grooves (2-2-2) are located outside K first arc-shaped grooves (2-2-1); the small beam (2-2-3) formed between the adjacent ends of two adjacent first arc-shaped grooves (2-2-1) is located inside one second arc-shaped groove (2-2-2), and the small beam (2-2-3) is located at the middle position of the second arc-shaped groove (2-2-2).

5. The adjustable center distance device for lens group centering machining according to claim 4, characterized in that: the central axis of the second arc-shaped groove (2-2-2) and the central axis of the first arc-shaped groove (2-2-1) are coaxial with the central axis of the process threaded hole (2-1); K is equal to 3. ​ 6. The adjustable center distance device for lens group centering machining according to claim 4, characterized in that: the depth of the first arc-shaped slot (2-2-1) and the depth of the second arc-shaped slot (2-2-2) are both greater than or equal to the depth of the process threaded hole (2-1).

7. The adjustable center distance device for lens group centering machining according to any one of claims 2-6, characterized in that: a flexible support structure (2-3) is arranged on the vertical section of the inverted T-shaped structure of the sliding block (2); the flexible support structure (2-3) comprises a slit (2-3-2) which penetrates through both sides of the sliding block (2) along the width direction of the sliding block (2); the flexible support structure (2-3) further comprises a pair of openings (2-3-1) which are arranged on both sides of the sliding block (2) along the length direction of the sliding block (2) and are located on the side of the slit (2-3-2) close to the front surface of the sliding block (2), each opening (2-3-1) extends along the length direction of the sliding block (2) and penetrates through both sides of the sliding block (2) along the width direction of the sliding block (2), and the inner end of each opening (2-3-1) along the length direction of the sliding block (2) is located inside the outer end of the slit (2-3-2), so that the distance between the inner ends of the pair of openings (2-3-1) is less than the size of the slit (2-3-2) along the length direction of the sliding block (2).

8. The adjustable center distance device for lens group centering machining according to claim 7, characterized in that: the distance between the surface of the opening (2-3-1) close to the front surface of the sliding block (2) and the front surface of the sliding block (2) along the height direction of the sliding block (2) is greater than the depth of the process threaded hole (2-1); the inner end of each opening (2-3-1) is rounded, and the two ends of the slit (2-3-2) along the length direction of the sliding block (2) are rounded.

9. The adjustable center distance device for lens group centering machining according to claim 4, characterized in that: the sliding block (2) is made of brass.

10. The adjustable center distance device for lens group centering machining according to claim 1, characterized in that: a through hole (1-4) is arranged at the center of the flat disc (1); N sliding rails (1-1) are arranged around the axis (A) of the flat disc (1); N is equal to 4, H is greater than or equal to 2, the distance L1 between the central axes of the two process threaded holes (2-1) with the smallest aperture in the radial direction of the flat disc (1) is greater than or equal to 20 mm, and the distance L2 between the central axes of the two process threaded holes (2-1) with the largest aperture is less than or equal to 100 mm; the size of the process threaded hole (2-1) is M2.5 mm to M6 mm.

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