Off-axis lens angle lifting measuring jig

Abstract

The utility model discloses an off-axis lens angle lifting measuring jig which comprises a base, one side of the base is provided with an inclined pressing block used for pressing one end of an off-axis lens, and the other side of the base is provided with a gear assembly. The gear assembly comprises a small gear and a large gear which are meshed with each other, a through small gear shaft is arranged in the center of the small gear, a through large gear shaft is arranged in the center of the large gear, and a lead screw is arranged on the lower portion of the large gear shaft; the device further comprises a lifting mechanism, the lifting mechanism comprises a nut matched with the lead screw, the nut is connected with a lifting rod, and the lifting rod is used for adjusting the height of the other end of the off-axis lens. According to the off-axis lens lifting device, the large gear and the small gear are combined, so that the large gear rotates for one circle when the small gear rotates for multiple circles, even if errors occur during operation of the small gear, the large gear cannot be greatly influenced, the lifting precision of the off-axis lens can be effectively improved, and the measurement precision is also improved.

Description

Technical Field

[0001] The utility model relates to the field of off-axis lens measurement, in particular to an off-axis lens angle lifting measurement fixture. Background Art

[0002] With the development of lens manufacturing technology and demand, lenses have produced many unconventional shapes. These lenses can often be processed into finished products but are difficult to measure. Off-axis lenses are one of them. The so-called off-axis lens is equivalent to removing a part from a complete lens, but in fact the off-axis lens is directly processed, rather than processing a complete lens first and then removing a part as an off-axis lens. Therefore, the measurement accuracy of the off-axis lens is low due to the lack of a reference, which is a problem that needs to be solved in the prior art. Utility Model Content

[0003] Purpose of the utility model: The purpose of the utility model is to provide an off-axis lens angle lifting measurement fixture that can perform high-precision measurement of off-axis lenses.

[0004] Technical solution: The off-axis lens angle lifting and measuring fixture described in the utility model includes a base, one side of the base is provided with an inclined pressure block for pressing one end of the off-axis lens, and the other side is provided with a gear assembly; the gear assembly includes a small gear and a large gear that mesh with each other, the center of the small gear is provided with a small gear shaft penetrating therethrough, the center of the large gear is provided with a large gear shaft penetrating therethrough, and the lower part of the large gear shaft is a screw rod; it also includes a lifting mechanism, the lifting mechanism includes a nut cooperating with the screw rod, the nut is connected to a lifting rod, and the lifting rod is used to adjust the height of the other end of the off-axis lens.

[0005] Furthermore, the gear assembly also includes a housing, and the lifting rod passes through the housing.

[0006] Furthermore, a vertical hole is provided on the side of the housing, and the lifting rod passes through the hole so that the lifting rod can move in the vertical direction. In this way, the large gear is driven to rotate by rotating the small gear, and since the hole is vertical, the lifting rod can move up and down in the vertical direction.

[0007] Furthermore, a hole is provided on the side of the housing, and the lifting rod passes through the hole, so that the lifting rod can rotate with the hole as a fulcrum; the lifting rod is movably connected to the nut. In this way, the large gear is driven to rotate by rotating the small gear, and the lifting rod can rotate because the hole provides a fulcrum.

[0008] Furthermore, a partition is provided in the shell, and the large gear shaft of the large gear and the small gear shaft of the small gear both pass through the partition. In this way, the shafts of the large and small gears can be positioned through the partition, making the entire structure more stable.

[0009] Furthermore, the base is provided with a hole for accommodating the lower end of the large gear shaft of the large gear, so that the large gear structure can be more stable.

[0010] Furthermore, it also includes a knob, which is arranged on the upper end of the pinion shaft of the pinion gear.

[0011] Furthermore, the lifting rod includes a claw that matches the shape of the other end of the off-axis lens, so that the stability of the cooperation between the lifting rod and the off-axis lens can be improved.

[0012] Furthermore, the surface of the oblique pressing block that contacts one end of the off-axis lens is inclined downward, so that the oblique pressing block can press the one end of the off-axis lens.

[0013] Furthermore, the reduction ratio between the large gear and the small gear is 10.

[0014] Beneficial effects: The utility model discloses an off-axis lens angle lifting measurement fixture, which has the following beneficial effects compared with the prior art:

[0015] 1. The utility model adopts a combination of large and small gears, so that the large gear rotates one circle when the small gear rotates multiple circles. In this way, even if an error occurs during the operation of the small gear, it will not cause a significant impact on the large gear, which can effectively improve the accuracy of off-axis lens lifting, that is, improve the measurement accuracy;

[0016] 2. The utility model provides two schemes of lifting mechanism. The first scheme is to set a vertical hole on the side of the shell, and the lifting rod passes through the hole, so that the lifting rod can move up and down in the vertical direction; the second scheme is to set a hole on the side of the shell, and the lifting rod passes through the hole, and the lifting rod is movably connected with the nut, so that the lifting rod can rotate with the hole as the fulcrum; the two schemes can be suitable for different needs. For example, the first scheme is suitable for lighter off-axis lenses, and the second scheme is suitable for heavier off-axis lenses. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a front view of the off-axis lens angle lifting measurement fixture in a specific embodiment of the utility model;

[0018] Figure 2 It is a stereoscopic diagram of the off-axis lens angle lifting measurement fixture in a specific implementation manner of the utility model. DETAILED DESCRIPTION

[0019] This specific embodiment discloses an off-axis lens angle lift measurement fixture, such as Figure 1As shown, the base 1 includes a base 1, one side of the base 1 is provided with an inclined pressing block 2 for pressing one end of the off-axis lens 7, and the other side is provided with a gear assembly. The gear assembly includes a pinion 3 and a large gear 4 that mesh with each other, the center of the pinion 3 is provided with a penetrating pinion shaft 31, the center of the large gear 4 is provided with a penetrating large gear shaft 41, and the lower part of the large gear shaft 41 is a screw 411. The surface of the inclined pressing block 2 that contacts one end of the off-axis lens 7 is inclined downward, so that the inclined pressing block 2 can press one end of the off-axis lens 7. The reduction ratio between the large gear 4 and the pinion 3 is 10.

[0020] The measuring fixture also includes a lifting mechanism 5, such as Figure 1 As shown, the lifting mechanism 5 includes a nut 51 matched with the screw rod 411, and the nut 51 is connected to a lifting rod 52, and the lifting rod 52 is used to adjust the height of the other end of the off-axis lens 7. In order to improve the stability of the lifting rod 52 and the off-axis lens 7, the lifting rod 52 includes a claw 521 that matches the shape of the other end of the off-axis lens 7. Figure 1 and Figure 2 shown.

[0021] To protect the gear assembly, the gear assembly further includes a housing 6, through which the lifting rod 52 passes. Figure 1 and Figure 2 As shown. A partition is provided in the housing 6, and the large gear shaft 41 of the large gear 4 and the small gear shaft 31 of the small gear 3 both pass through the partition. In this way, the shafts of the large and small gears can be positioned through the partition, making the entire structure more stable. A hole is provided on the base 1 to accommodate the lower end of the large gear shaft 41 of the large gear 4, so that the large gear structure can be more stable.

[0022] In order to better operate the pinion 3, the measuring fixture also includes a knob 8, such as Figure 1 and Figure 2 As shown, the knob 8 is disposed on the upper end of the pinion shaft 31 of the pinion 3 .

[0023] The structure of the lifting mechanism 5 and the housing 6 can be implemented in two embodiments:

[0024] Embodiment 1:

[0025] A vertical hole is provided on the side of the housing 6, and the lifting rod 52 passes through the hole, so that the lifting rod 52 can move in the vertical direction. This embodiment is suitable for the case where the off-axis lens is light in weight, and the large gear 4 is driven to rotate by rotating the small gear 3. Since the hole is vertical, the lifting rod 52 can move up and down in the vertical direction.

[0026] Embodiment 2:

[0027] A hole is provided on the side of the housing 6, and the lifting rod 52 passes through the hole, so that the lifting rod 52 can rotate with the hole as a fulcrum. In addition, the lifting rod 52 is movably connected to the nut 51, for example, it can be hinged. This embodiment is suitable for the case where the off-axis lens is heavy, and the lifting rod 52 can rotate with the hole as a fulcrum.

[0028] Since the reduction ratio between the large gear 4 and the small gear 3 is 10, the large gear only rotates 1 circle when the small gear 3 rotates 10 circles. Therefore, even if an error occurs during the operation of the small gear 3, it will not have a significant impact on the large gear 4, which can effectively improve the accuracy of off-axis lens lifting, that is, improve the measurement accuracy.

[0029] The above is only a preferred specific implementation of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed in the present invention should be covered by the protection scope of the present invention.

Claims

1. Off-axis lens angle lifting measurement fixture, characterized by: The invention comprises a base (1), one side of the base (1) is provided with an inclined pressing block (2) for pressing one end of an off-axis lens (7), and the other side is provided with a gear assembly; the gear assembly comprises a small gear (3) and a large gear (4) meshing with each other, the center of the small gear (3) is provided with a small gear shaft (31) penetrating therethrough, the center of the large gear (4) is provided with a large gear shaft (41) penetrating therethrough, and the lower part of the large gear shaft (41) is a screw rod (411); and the invention also comprises a lifting mechanism (5), the lifting mechanism (5) comprises a nut (51) matched with the screw rod (411), the nut (51) is connected to a lifting rod (52), and the lifting rod (52) is used to adjust the height of the other end of the off-axis lens (7).

2. The off-axis lens angle lift measurement fixture according to claim 1, characterized in that: The gear assembly also includes a housing (6), and the lifting rod (52) passes through the housing (6).

3. The off-axis lens angle lift measurement fixture according to claim 2, characterized in that: A vertical hole is provided on the side of the housing (6), and the lifting rod (52) passes through the hole, so that the lifting rod (52) can move in the vertical direction.

4. The off-axis lens angle lift measurement fixture according to claim 2, characterized in that: The side of the housing (6) is provided with a hole, through which the lifting rod (52) passes, so that the lifting rod (52) can rotate with the hole as a fulcrum; the lifting rod (52) is movably connected to the nut (51).

5. The off-axis lens angle lift measurement fixture according to claim 2, characterized in that: A partition is provided inside the housing (6), and the large gear shaft (41) of the large gear (4) and the small gear shaft (31) of the small gear (3) both pass through the partition.

6. The off-axis lens angle lift measurement fixture according to claim 5, characterized in that: The base (1) is provided with a hole for accommodating the lower end of the large gear shaft (41) of the large gear (4).

7. The off-axis lens angle lift measurement fixture according to any one of claims 1 to 6, characterized in that: It also includes a knob (8), which is arranged on the upper end of the pinion shaft (31) of the pinion (3).

8. The off-axis lens angle lift measurement fixture according to any one of claims 1 to 6, characterized in that: The lifting rod (52) comprises a claw (521) whose shape matches that of the other end of the off-axis lens (7).

9. The off-axis lens angle lift measurement fixture according to any one of claims 1 to 6, characterized in that: The surface of the oblique pressure block (2) that contacts one end of the off-axis lens (7) is inclined downward, so that the oblique pressure block (2) can press the one end of the off-axis lens (7).

10. The off-axis lens angle lift measurement fixture according to any one of claims 1 to 6, characterized in that: The reduction ratio between the large gear (4) and the small gear (3) is 10.

Images