Coaxial lens fixing device

Abstract

The utility model provides a coaxial lens fixing device which comprises an inner annular block and an outer annular block coaxially and slidably sleeved on the inner annular block, and one ends of the inner annular block and the outer annular block are coplanar to form a lens clamping surface; the movable column is arranged on the outer wall of the inner annular block, the fixed column is arranged on the outer wall of the outer annular block, a movable groove is formed in the side wall of the outer annular block, and the movable column can move along the movable groove when the inner annular block rotates in the axial direction; a plurality of lens clamping mechanisms are arranged on the lens clamping surface in an annular array mode with the axis of the inner annular block as the circle center. The lens clamping mechanism comprises a lens clamping arm arranged on the lens clamping surface, and a main lens clamping column and an auxiliary fixing device are arranged at one end, close to the axis of the inner annular block, of the lens clamping arm; one end of the lens clamping arm is rotationally connected with the outer annular block, and the lens clamping arm is further movably connected with the inner annular block, so that when the inner annular block rotates relative to the outer annular block, the whole lens clamping arm rotates, and the distance from the main lens clamping column to the axis of the inner annular block is changed.

Description

Technical Field

[0001] The utility model relates to the field of lens fixing devices, in particular to a coaxial lens fixing device. Background Art

[0002] The detection of the lens involves the R value, that is, the detection of the radius of curvature, and the surface shape of the lens. When detecting the above two parameters, a horizontal interferometer is required for measurement. At this time, a special fixing device is required to fix the lens.

[0003] The coaxial lens fixing device is usually used when using a horizontal interferometer to measure the R value and surface shape of the lens, and plays the role of fixing the lens.

[0004] To adjust the traditional lens frame up and down, the plug-in rod needs to be manually adjusted to the desired position and tightened with screws, which is inconvenient to adjust. In addition, the traditional lens frame cannot be adjusted accurately, resulting in insufficient lens installation accuracy. Traditional lens frames usually use three-point clamping, which can easily cause thinner lenses to produce elastic deformation or even damage. In addition, traditional lens frames have problems with unstable lens fixation, which can easily cause lenses to fall off during vibration. In general, traditional lens frames have poor adjustment accuracy, unstable lens fixation, and cannot install lenses of various diameters. The scope of application is relatively limited and cannot meet the adjustment requirements under all working conditions. Utility Model Content

[0005] A coaxial lens fixing device is provided. The coaxial lens adjustment mechanism can achieve highly precise adjustment, has a simple structure, is easy to operate, can stably install lenses of different diameters, has a wide range of applications, and can meet the adjustment requirements of various working conditions.

[0006] In order to solve the above technical problems, the technical solutions adopted by the present utility model are as follows:

[0007] A coaxial lens fixing device comprises an inner annular block and an outer annular block coaxially slidably sleeved on the inner annular block, one end of the two being coplanar to form a lens clamping surface;

[0008] It also includes a moving column arranged on the outer wall of the inner annular block and a fixed column arranged on the outer wall of the outer annular block. A moving groove is provided on the side wall of the outer annular block. The moving column passes through the moving groove and extends to the outside. When the inner annular block rotates axially, the moving column can move along the moving groove. A plurality of lens clamping mechanisms are arranged in a circular array with the axis of the inner annular block as the center of the circle on the lens clamping surface.

[0009] The clamping mechanism includes a clamping arm arranged on the lens clamping surface, and a main clamping column and an auxiliary fixing device are arranged at one end of the clamping arm close to the axis of the inner ring block, and the main clamping column is parallel to the axis of the inner ring block; one end of the clamping arm is rotatably connected to the outer ring block, and the clamping arm is also movably connected to the inner ring block, so that when the inner ring block rotates relative to the outer ring block, the clamping arm rotates as a whole, changing the distance from the main clamping column to the axis of the inner ring block.

[0010] Furthermore, a strip hole is provided on the lens clamp arm; and a movable shaft perpendicular to the end face is provided on the inner annular block at a position corresponding to the strip hole, and the movable shaft passes through the strip hole.

[0011] Furthermore, the auxiliary fixing device includes a sleeve on the clamp arm and an inner tube arranged in the sleeve, a spring is coaxially arranged between the inner end surface of the sleeve and one end of the inner tube located in the sleeve, and an auxiliary clamp column is fixedly connected to one end of the inner tube close to the axis of the inner ring block, and the auxiliary clamp column is parallel to the axis of the inner ring block.

[0012] Furthermore, a tension spring is fixedly connected between the movable column and the fixed column, and the tension spring is in an extended state, and the tension spring pulls the movable column toward the fixed column.

[0013] Furthermore, a fixing plate is vertically arranged on the clamping arm, and the sleeve passes through and is fixedly connected to the fixing plate.

[0014] Furthermore, two sleeves and matched inner tubes and auxiliary clamping columns are symmetrically arranged on the fixing plate.

[0015] Furthermore, the main clamping column and the auxiliary clamping column are covered with a layer of elastic material, and the side surfaces are concave to match the shape of the edge of the lens.

[0016] Furthermore, a flange extending inwards and used for clamping the outer edge of the lower side of the inner annular block is provided on the inner edge of the lower side of the outer annular block.

[0017] Furthermore, a circle of magnetic strips is arranged on the upper surface of the flange, and a circle of magnetic strips is also arranged on the surface of the inner annular block in contact with the flange, and the contact surfaces of the two magnetic strips are of the same polarity.

[0018] Furthermore, a support is provided on the outer edge of the lower side of the outer annular block.

[0019] The utility model has the following beneficial effects: in view of the problem in the prior art that the hand-inserted and pulled-out rod needs to be inserted to the required height and then tightened with screws, which is inconvenient to adjust, the device is provided with a movable column on the outer wall of the inner annular block and a fixed column on the outer wall of the outer annular block, and a tension spring is installed between the movable column and the fixed column to realize automatic pulling back after the movable column is pulled, thereby driving the clamping arm to automatically clamp the lens. In view of the problem that the traditional lens frame has the problem that the fixed lens is not firm and the lens is easily dropped during vibration, the device is provided with a main clamping column and an auxiliary clamping column to clamp the lens at multiple points, the main clamping column and the auxiliary clamping column are coated with a layer of elastic material, and the side surface is concave to match the edge shape of the lens, so that the lens can be clamped more stably. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is the front view of the utility model;

[0021] Figure 2 It is a schematic diagram of the use of the utility model;

[0022] Figure 3 It is a side view of the utility model;

[0023] Figure 4 It is a longitudinal cross-sectional structural diagram of the main mirror clamping column and the auxiliary mirror clamping column of the utility model;

[0024] Figure 5 This is a structural diagram of the casing and inner tube of the utility model;

[0025] Figure 6 This is a structural diagram of the clamping mirror mechanism of the utility model;

[0026] In the above drawings: the clamping mechanism 1, the outer through hole 11, the strip hole 12, the clamping arm 13, the fixing plate 14, the main clamping column 141, the auxiliary clamping column 142, the spring 15, the limit buckle 16, the limit protrusion 17, the sleeve 18, the inner tube 19, the inner annular block 2, the movable column 21, the movable groove 22, the movable shaft 23, the outer annular block 3, the fixed column 31, the flange 32, the fixed shaft 33, the tension spring 4, and the support 5. DETAILED DESCRIPTION

[0027] The following is explained in conjunction with the accompanying drawings and embodiments:

[0028] like Figure 1 As shown, a coaxial lens fixing device comprises an inner ring block 2 and an outer ring block 3 coaxially slidably sleeved on the inner ring block 2, one end of the two being coplanar to form a lens clamping surface;

[0029] The invention also includes a moving column 21 arranged on the outer wall of the inner annular block 2 and a fixed column 31 arranged on the outer wall of the outer annular block 3. The side wall of the outer annular block 3 is provided with a moving groove 22. The moving column 21 passes through the moving groove 22 and extends to the outside. When the inner annular block 2 rotates axially, the moving column 21 can move along the moving groove 22. A plurality of lens clamping mechanisms 1 are arranged in an annular array with the axis of the inner annular block 2 as the center of the circle on the lens clamping surface; and as shown in FIG. Figure 1 As shown, preferably, a tension spring 4 is fixedly connected between the movable column 21 and the fixed column 31, and the tension spring 4 is in an extended state. The tension spring 4 pulls the movable column 21 toward the fixed column 31, and the tension spring 4 plays a role of automatic retraction, so that the clamping arm 13 is automatically tightened.

[0030] The clamping mechanism includes a clamping arm 13 arranged on the lens clamping surface, and a main clamping column 141 and an auxiliary fixing device are arranged at one end of the clamping arm 13 close to the axis of the inner ring block 2, and the main clamping column 141 is parallel to the axis of the inner ring block 2; one end of the clamping arm 13 is rotatably connected to the outer ring block 3, and the clamping arm 13 is also movably connected to the inner ring block 2, so that when the inner ring block 2 rotates relative to the outer ring block 3, the clamping arm 13 rotates as a whole, changing the distance from the main clamping column 141 to the axis of the inner ring block 2.

[0031] like Figure 1 As shown, preferably, the lens clamp arm 13 is provided with a strip hole 12 ; the inner annular block 2 is provided with a movable shaft 23 perpendicular to the end face at a position corresponding to the strip hole 12 , and the movable shaft 23 passes through the strip hole 12 .

[0032] like Figure 5 and Figure 6 As shown, a fixing plate 14 is vertically arranged on the clamping arm 13, a sleeve 18 is passed through and fixedly connected to the fixing plate 14, and an inner tube 19 is arranged in the sleeve 18, a spring 15 is coaxially arranged between the inner end surface of the sleeve 18 and one end of the inner tube 19 located in the sleeve 18, and an auxiliary clamping column 142 is fixedly connected to one end of the inner tube 19 near the axis of the inner ring block 2, and the auxiliary clamping column 142 is parallel to the axis of the inner ring block 2. And as shown Figure 1 As shown, preferably, two sleeves 18 and a matching inner tube 19 and an auxiliary lens clamping column 142 are symmetrically arranged on the fixing plate 14. Figure 4 As shown, the main lens clamping column 141 and the auxiliary lens clamping column 142 are wrapped with a layer of elastic material, and the side surface is concave to match the shape of the lens edge. The concave part in the middle can play a good role in fixing the lens, and the elastic material can prevent the lens from being damaged.

[0033] like Figure 3As shown, preferably, a flange 32 extending inwardly for clamping the outer edge of the lower side of the inner ring block 2 is provided on the inner edge of the lower side of the outer ring block 2, and the flange 32 plays the role of clamping the inner ring block 2, and a circle of magnetic strips is provided on the upper surface of the flange 32, and a circle of magnetic strips is also provided on the surface of the inner ring block 2 that contacts the flange 32. The contact surfaces of the two magnetic strips are of the same polarity, and the magnetic strips of the same polarity repel each other, which can reduce the friction between the inner ring block 2 and the outer ring block 3.

[0034] like Figure 3 As shown, preferably, a support 5 is provided on the outer edge of the lower side of the outer annular block 3, and the support 5 plays a supporting role for the device.

[0035] like Figure 2 As shown, when using the device, first pull the movable column 21 along the movable groove 22 clockwise. At this time, since the outer ring block is fixed on the support 5, it does not move, and only the inner ring block 2 moves, so the movable shaft 23 starts to move clockwise, and the fixed shaft 33 does not move at this time. Since the movable shaft is located in the strip hole, during the rotation process, the outer through hole 11 is rotatably connected with the fixed shaft 33. At this time, under the action of the movable shaft 23, the end of the clamping arm 13 away from the strip hole starts to move counterclockwise with the fixed shaft 33, and the three The clamping arms 13 all move according to this rule, and finally the end where the main clamping column 141 is located opens outward. At this time, the lens is placed in the center, and the movable column 21 is slowly released. The movable column 21 tends to return to the initial position under the action of the tension spring 4. At this time, the movable shaft 23 moves counterclockwise around the inner ring block 2. Since the fixed shaft 33 is stationary, the clamping arm 13 moves clockwise with the fixed shaft 33 as the axis. During the movement, the three main clamping columns 141 slowly form a tendency to clamp the intermediate object, and together form a lens clamping surface.

[0036] An auxiliary lens clamping device is installed on the lens clamping arm 13. When the lens clamping arm 13 is tightened inward, the auxiliary lens clamping column 142 will also come into contact with the lens, so as to balance the force on the lens and improve the instability of the lens clamping and the deformation caused by the lens clamping. Since the inner tube 19 of the auxiliary lens clamping device is elastically arranged in the sleeve 18, when the diameter of the lens is different, under the action of the spring 15, the position of the auxiliary lens clamping column 142 can adapt to the diameter of the lens without manual adjustment.

[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A coaxial lens fixing device, characterized in that: It comprises an inner annular block (2) and an outer annular block (3) coaxially slidably sleeved on the inner annular block (2), one end of the two being coplanar to form a lens clamping surface; It also includes a moving column (21) arranged on the outer wall of the inner annular block (2) and a fixed column (31) arranged on the outer wall of the outer annular block (3); a moving groove (22) is provided on the side wall of the outer annular block (3); the moving column (21) penetrates the moving groove (22) and extends to the outside; when the inner annular block (2) rotates axially, the moving column (21) can move along the moving groove (22); a plurality of lens clamping mechanisms (1) are arranged in a circular array with the axis of the inner annular block (2) as the center of the circle on the lens clamping surface; The clamping mechanism (1) comprises a clamping arm (13) arranged on a lens clamping surface, and a main clamping column (141) and an auxiliary fixing device are arranged at one end of the clamping arm (13) close to the axis of the inner ring block (2), and the axis of the main clamping column (141) and the axis of the inner ring block (2) are parallel to each other; one end of the clamping arm (13) is rotatably connected to the outer ring block (3), and the clamping arm (13) is also movably connected to the inner ring block (2), so that when the inner ring block (2) rotates relative to the outer ring block (3), the clamping arm (13) rotates as a whole, thereby changing the distance between the main clamping column (141) and the axis of the inner ring block (2).

2. A coaxial lens fixing device according to claim 1, characterized in that: The clamping mirror arm (13) is provided with a strip hole (12); the inner annular block (2) is provided with a movable shaft (23) perpendicular to the end surface at a position corresponding to the strip hole (12), and the movable shaft (23) passes through the strip hole (12).

3. A coaxial lens fixing device according to claim 1, characterized in that: The auxiliary fixing device comprises a sleeve (18) on the clamping mirror arm (13), and an inner tube (19) arranged in the sleeve (18); a spring (15) is coaxially arranged between the inner end surface of the sleeve (18) and one end of the inner tube (19) located in the sleeve; an auxiliary clamping mirror column (142) is fixedly connected to one end of the inner tube (19) close to the axis of the inner ring block (2); and the auxiliary clamping mirror column (142) is parallel to the axis of the inner ring block (2).

4. The coaxial lens fixing device according to claim 1, characterized in that: A tension spring (4) is fixedly connected between the movable column (21) and the fixed column (31), and the tension spring (4) is in an extended state.

5. The coaxial lens fixing device according to claim 3, characterized in that: A fixing plate (14) is vertically arranged on the clamping mirror arm (13), and the sleeve (18) passes through and is fixedly connected to the fixing plate (14).

6. A coaxial lens fixing device according to claim 5, characterized in that: The fixing plate (14) is symmetrically provided with two sleeves (18) and a matched inner tube (19) and an auxiliary mirror clamping column (142).

7. The coaxial lens fixing device according to claim 3, characterized in that: The main lens clamping column (141) and the auxiliary lens clamping column (142) are covered with a layer of elastic material, and the side surfaces are concave to match the shape of the lens edge.

8. The coaxial lens fixing device according to claim 1, characterized in that: The inner edge of the lower side of the outer annular block (3) is provided with a flange (32) extending inwards and used for clamping the outer edge of the lower side of the inner annular block (2).

9. The coaxial lens fixing device according to claim 8, characterized in that: A circle of magnetic strips is arranged on the upper surface of the flange (32), and a circle of magnetic strips is arranged on the surface of the inner annular block (2) in contact with the flange (32), and the contact surfaces of the two magnetic strips are of the same polarity.

10. The coaxial lens fixing device according to claim 1, characterized in that: The lower outer edge of the outer annular block (3) is fixedly connected to a support (5).

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