CN216485734U - Gearless transmission type full-closed-loop automatic zoom lens - Google Patents

Abstract

The utility model discloses a gearless transmission type full-closed-loop automatic zoom lens, including locating the preceding, back fixed component of lens seat shell, the rear end, be equipped with between preceding, back fixed component and become doubly, compensate the component, become doubly, compensate the component and install respectively in lens seat I and lens seat II, lens seat I and lens seat II are installed on left, right linear guide through left, right slide and move according to setting for the orbit along the optical axis under the moving mechanism drive, the moving mechanism includes locating left, right linear guide below and the zoom screw axis parallel with the optical axis, the zoom has been seted up on the zoom screw axis, compensate the helicla flute, the preceding, the rear axle head of zoom screw axis is installed respectively on preceding, rear bearing bedplate through the bearing screw axis, the rear axle head of zoom connects the output shaft of gear motor through the shaft coupling; a pin I and a pin II are respectively in sliding fit in the zooming spiral groove and the compensation spiral groove, and the pin I and the pin II are respectively connected with the microscope base I and the microscope base II. The utility model discloses good reliability, precision height, good reproducibility.

Description

Gearless transmission type full-closed-loop automatic zoom lens

Technical Field

The utility model relates to an optical instrument part structure specifically is a gearless transmission formula full cut-off ring automatic zoom camera lens.

Background

In order to solve the technical defect that the traditional automatic zoom lens exists, the applicant unit provides a patent application of a full-closed-loop automatic zoom lens with the patent number of ZL201721200754.0, the utility model discloses a technical scheme of the full-closed-loop automatic zoom lens comprises a front fixed component, a rear fixed component, a zoom component and a compensation component between the front fixed component and the rear fixed component, the zoom component and the compensation component are arranged on a multiplying power adjusting device, a sliding mechanism of the multiplying power adjusting device comprises a left linear guide rail, a right linear guide rail, a front sliding seat and a rear sliding seat which are in sliding fit with the two guide rails, the zoom component is arranged on the front sliding seat, and the compensation component is arranged on the rear sliding seat; the moving mechanism of the multiplying power adjusting device comprises a multiplying screw shaft, a multiplying screw groove for the sliding installation of the multiplying power component and a compensating screw groove for the sliding installation of the compensating component are arranged on the multiplying screw shaft, and the multiplying screw shaft is driven by a multiplying motor.

The patented technology has at least two problems in practical application:

1. because torque is transmitted between the zooming motor and the zooming screw shaft through gear transmission, and a meshing gap exists between the gear of the zooming screw shaft and the gear on the zooming motor, the zooming screw shaft cannot be locked under the condition that the zooming motor does not move, and when the conditions of vibration, acceleration and the like of a certain degree exist outside, the zooming screw shaft in a free state can be disturbed, so that the zooming screw shaft slightly rotates, and further the multiplying power of an optical system changes.

2. The optical lens is directly connected and bonded on the mechanism parts of the variable-power component and the compensation component, and the offset of the optical axis of each component relative to the optical axis of the optical system is within a specified range by means of adjusting the mechanism parts of the variable-power component and the compensation component.

SUMMERY OF THE UTILITY MODEL

The not enough to prior art, the utility model aims to solve the technical problem that a gearless transmission formula full cut-off ring automatic zoom lens that zoom precision is high and camera lens stability is good has been proposed.

The gearless transmission type full-closed-loop automatic zoom lens capable of solving the technical problems comprises a front fixed component and a rear fixed component which are arranged at the front end and the rear end of a lens base shell in the same optical axis, wherein the front fixed component and the rear fixed component are arranged between the front fixed component and the rear fixed component in the same optical axis, the zoom component and the compensation component are respectively arranged on a lens base I and a lens base II, the lens base I and the lens base II are arranged on a left linear guide rail and a right linear guide rail through corresponding left sliding seats and right sliding seats and respectively move along the optical axis according to a set track under the driving of a moving mechanism, the moving mechanism comprises a zoom screw shaft which is arranged in the center below the left linear guide rail and the right linear guide rail and is parallel to the optical axis, a screw shaft zoom spiral groove and a compensation spiral groove are formed in the zoom screw groove and the compensation spiral groove, a pin I and a pin II are respectively matched in a sliding way, the pin I and the pin II are respectively connected with the lens base I and the lens base II, the preceding, the back axle head of zoom screw axis passes through the bearing and installs respectively on front bearing bedplate and back bearing bedplate, and the institute is different: the rear shaft end of the zooming spiral shaft is coaxially connected with an output shaft of the speed reducing motor through a coupler.

In the structure, when the speed reducing motor does not rotate, a certain torque is kept, and the variable-power screw shaft can be locked under the action of the torque.

Furthermore, each component comprises a lens cone and a lens arranged in the lens cone, each lens cone is provided with an adjustable flange, the front fixing component and the rear fixing component are fixedly arranged on the lens base shell through the flanges, and the zoom component and the compensation component are respectively arranged on the lens base I and the lens base II through the flanges.

For the installation of gear motor, a motor base section of thick bamboo is installed in the rear end of camera lens seat shell through the throat formula ring flange of barrel front end with the optical axis, gear motor installs on the throat formula ring flange in a motor base section of thick bamboo, set up coaxial shaft coupling on throat formula ring flange and the camera lens seat shell rear end and dodge the hole.

Furthermore, gear motor connects the leading-out terminal of locating the drive control circuit board between lens upper cover and microscope base I and the microscope base II through circuit I, the leading-in terminal of drive control circuit board is covered the six-needle aviation socket that sets up and be used for external power supply and PC on connecting the lens through circuit II.

The utility model has the advantages that:

the utility model discloses automatic zoom lens of no gear drive formula full cut-off ring has that the zoom precision is high, camera lens stability is good, long service life and simple process's characteristics, can be applicable to the occasion that has disturbances such as vibration, acceleration.

Drawings

Fig. 1 is a schematic view of an external structure according to an embodiment of the present invention.

Fig. 2 is an exploded view of the embodiment of fig. 1.

Fig. 3 is an exploded view of the moving mechanism of fig. 2.

And (3) identifying the figure number: 1. a front fixed component; 2. rear fixed component; 3. a variable-magnification component; 4. a compensation component; 5. a lens mount housing; 6. a slide base; 7. a linear guide rail; 8. a zoom screw shaft; 9. a bearing; 10. a front bearing mount plate; 11. a rear bearing seat plate; 12. a coupling; 13. a reduction motor; 14. a microscope base I; 15. a lens base II; 16. a motor base cylinder; 17. a lens upper cover; 18. a six pin aviation socket; 19. a front objective lens group; 20. and a moving mechanism.

Detailed Description

The technical solution of the present invention will be further explained with reference to the embodiments shown in the drawings.

The utility model discloses automatic zoom lens of no gear drive formula full cut-off ring, including the camera lens seat shell 5 that has lens upper cover 17, preceding fixed component 1 and back fixed component 2 are installed through corresponding adjustable ring flange with the optical axis to preceding, rear end of camera lens seat shell 5, still are equipped with the preceding objective group 19 with preceding fixed component 1 with the optical axis through adjustable ring flange on the front end of camera lens seat shell 5, and the rear end of camera lens seat shell 5 is equipped with motor seat section of thick bamboo 16, motor seat section of thick bamboo 16 is installed on camera lens seat shell 5 and with back fixed component 2 with the optical axis through the internal contraction formula ring flange of front end, inside camera lens seat shell 5, preceding, back are equipped with zoom component 3 and compensation component 4 with the optical axis between preceding fixed component 1 and the back fixed component 2, zoom component 3 installs on camera lens seat I14 through adjustable ring flange, camera lens seat I14 is through the left side of correspondence, The right slide carriage 6 is installed on the front part of the left and right horizontal linear guide rails 7, the compensation component 4 is installed on the lens base II 15 through an adjustable flange, the lens base II 15 is installed on the rear parts of the left and right linear guide rails 7 through the corresponding left and right slide carriages 6, and the lens base I14 and the lens base II 15 are driven by a moving mechanism 20 arranged in the lens base shell 5 to respectively drive the zoom component 3 and the compensation component 4 to move along the left and right linear guide rails 7 according to a set track; a horizontal driving control circuit board is arranged in the lens base shell 5 between the lens upper cover 17 and the lens base I14 and the lens base II 15, the wire inlet end of the driving control circuit board is connected with a six-pin aviation socket 18 through a circuit II penetrating through the lens upper cover 17, and the six-pin aviation socket 18 is installed on the lens upper cover 17 and used for being connected with an external power supply and a PC (personal computer), as shown in figures 1 and 2.

The moving mechanism 20 comprises a zooming spiral shaft 8 which is arranged in the center below the left and right linear guide rails 7 and is parallel to the optical axis, the front and rear shaft ends of the zooming spiral shaft 8 are respectively arranged on a front bearing seat plate 10 and a rear bearing seat plate 11 through bearings 9, the front bearing seat plate 10 and the rear bearing seat plate 11 are fixedly arranged in the lens seat shell 5, the rear shaft end of the zooming spiral shaft 8 is connected with the output shaft of a speed reducing motor 13 through an elastic coupling 12, in order to enable the speed reducing motor 13 to effectively restrain the zooming spiral shaft 8 when not rotating, the speed reducing motor 13 adopts a speed reducer which has zero back clearance when rotating reversely, the speed reducing motor 13 is eccentrically arranged on an inward-shrinkage type flange plate in a motor seat barrel 16, and the coupling 12 is arranged in a coupling avoiding hole which is coaxially arranged on the inward-shrinkage type flange plate and the rear end of the lens seat shell 5 in a penetrating manner; a pin I and a pin II are respectively arranged in the zooming spiral groove and the compensation spiral groove in a sliding fit mode, and the pin I and the pin II are respectively connected to the bottoms of the microscope base I14 and the microscope base II 15, as shown in figure 3.

The driving control circuit board drives the speed reducing motor 13 to respectively drive the variable-magnification component 3 and the compensation component 4 to move, and the driving control circuit board also precisely controls the displacement of the variable-magnification component 3 and the compensation component 4 in a closed-loop manner in the moving process, so that the variable-magnification effect with high precision and no image change in the whole process is realized.

Claims (4)

1. A gearless transmission type full-closed-loop automatic zoom lens comprises a front fixed component (1) and a rear fixed component (2) which are arranged at the front end and the rear end of a lens base shell (5) in the same optical axis, wherein a zoom component (3) and a compensation component (4) are arranged between the front fixed component (1) and the rear fixed component (2) in the same optical axis, the zoom component (3) and the compensation component (4) are respectively arranged on a lens base I (14) and a lens base II (15), the lens base I (14) and the lens base II (15) are arranged on a left linear guide rail (7) and a right linear guide rail (7) through corresponding left and right sliding seats (6) and respectively move along the optical axis according to a set track under the driving of a moving mechanism (20), the moving mechanism (20) comprises a zoom screw shaft (8) which is arranged at the center below the left linear guide rail (7) and is parallel to the optical axis, and a zoom screw shaft and a compensation screw groove are arranged on the zoom screw shaft (8), become times spiral groove and compensation spiral inslot sliding fit respectively have pin I and pin II, pin I and pin II connect microscope base I (14) and microscope base II (15) respectively, and the preceding, the back axle head of becoming times spiral shaft (8) is passed through bearing (9) and is installed respectively on front bearing bedplate (10) and back bearing bedplate (11), its characterized in that: the rear shaft end of the zooming spiral shaft (8) is coaxially connected with an output shaft of a speed reducing motor (13) through a coupler (12).

2. The gearless transmission type full-closed-loop automatic zoom lens according to claim 1, wherein: each group component comprises a lens cone and a lens arranged in the lens cone, each lens cone is provided with an adjustable flange, the front fixing component (1) and the rear fixing component (2) are fixedly arranged on the lens base shell (5) through the flanges, and the zoom component (3) and the compensation component (4) are respectively arranged on the lens base I (14) and the lens base II (15) through the flanges.

3. The gearless transmission type full-closed-loop automatic zoom lens according to any one of claims 1 or 2, wherein: a motor base section of thick bamboo (16) are installed in the rear end of camera lens seat shell (5) through the throat formula ring flange of barrel front end with the optical axis, gear motor (13) are installed on the throat formula ring flange in motor base section of thick bamboo (16), set up coaxial shaft coupling on throat formula ring flange and camera lens seat shell (5) rear end and dodge the hole.

4. The gearless transmission type full-closed-loop automatic zoom lens according to claim 3, wherein: gear motor (13) are connected through circuit I and are located lens upper cover (17) and the leading-out terminal of the drive control circuit board between I (14) of microscope base and II (15) of microscope base, the inlet wire end of drive control circuit board passes through circuit II and connects six needle aviation sockets (18) that set up on lens upper cover (17) and be used for external power supply and PC.

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