CN207181788U - Closed-loop automatic variable power lens - Google Patents
Closed-loop automatic variable power lens Download PDFInfo
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- CN207181788U CN207181788U CN201721202754.0U CN201721202754U CN207181788U CN 207181788 U CN207181788 U CN 207181788U CN 201721202754 U CN201721202754 U CN 201721202754U CN 207181788 U CN207181788 U CN 207181788U
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- zoom
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Abstract
The utility model discloses a kind of closed-loop automatic variable power lens, including the zoom constituent element between forward and backward fixed constituent element and forward and backward fixed constituent element and compensation constituent element, zoom constituent element and compensation constituent element are on multiplying power regulating device, the sliding equipment of multiplying power regulating device includes left and right line slideway and the forward and backward slide being slidably matched with two guide rails, zoom constituent element are installed on preceding slide and compensate constituent element and be installed on rear slide；The travel mechanism of multiplying power regulating device includes zoom helical axis, which is provided with the zoom helicla flute being slidably installed for zoom constituent element and the compensation helicla flute being slidably installed for compensation constituent element, and zoom helical axis is driven to zoom motor；Permanent magnet and magnetic grid, control board is set to be provided with Hall switch chip and detection chip on zoom constituent element and compensation constituent element；Control board drives zoom motor and connects PC by signal wire.The utility model precision is high, and zoom is reproducible, and mechanism operates steadily, long lifespan, and technique is simple.
Description
Technical field
Optical instrument modular construction is the utility model is related to, specially a kind of closed-loop automatic variable power lens.
Background technology
Zoom objective is made up of preceding fixed constituent element, zoom constituent element, compensation constituent element, rear fixed constituent element.
During object lens zoom, zoom constituent element and compensation constituent element is needed to be moved by specific track along optical axis, so as to keep object lens picture
Face position is stable.
The structure of traditional automatic variable power lens is：Preceding fixed constituent element and rear fixed constituent element are fixedly installed in zoom lens barrel two
End, zoom constituent element and compensation constituent element are coordinated with zoom lens barrel using small―gap suture, are milled with guiding straight trough on zoom lens barrel, this two constituent element
Straight trough direction can be oriented in zoom lens barrel interior edge to slide；Zoom curve cylinder is cased with outside zoom lens barrel, the two small―gap suture coordinates；Zoom
Driving zoom constituent element is machined with curve cylinder and compensates the helicla flute of constituent element motion；Zoom constituent element and compensation constituent element pass through connecting pin
The guiding straight trough followed closely through zoom lens barrel is connected with zoom curve cylinder.
When zoom curve cylinder rotates, zoom constituent element and compensation constituent element press zoom curve helicla flute along straight trough direction is oriented to
Track is moved, and carries gear on times curve cylinder, motor with encoder is mounted on mirror head outer shell, pacified on motor output shaft
The gear of dress engages with the gear on zoom curve cylinder, and the multiplying power of zoom curve cylinder rotational angle and camera lens has unique corresponding pass
System.
External drive control circuit is connected with motor by cable, and drive control circuit can send driving pulse to motor
Signal and reception carry out the angle feedback signal of self-encoding encoder；External drive control circuit is (personal by signal cable line and PC
Computer) connection, data communication is carried out, external power source is directly powered to drive control circuit.
Traditional specific course of work of automatic variable power lens is as follows：PC sends zoom instruction to drive control circuit, drives
Dynamic control circuit motor motion and real-time reception carry out the feedback data of self-encoding encoder, drive control circuit will after completing zoom
Related data is uploaded to PC.
Following technological deficiency be present in traditional automatic variable power lens：
1st, sliding friction be present between zoom constituent element and compensation constituent element and zoom lens barrel, zoom can be caused to have some setbacks and block
Extremely, easily abrasion；Because the two has gap, each constituent element of motion process occurs upset, causes optical centre to offset.
2nd, zoom curve cylinder process is easily deformed, and causes zoom helicla flute size uneven, helicla flute and pin
Fit clearance is big, and its movement locus deviates actual optical design requirements track, influences image quality and multiplying power.
3rd, encoder is only capable of feeding back motor rotational angle, this rotational angle to the mobile presence for causing zoom, compensating constituent element
, there is driving error in a series of driving-chain, cause zoom poor repeatability.
4th, control circuit is away from camera lens, cause encoder transmission data easily by electromagnetic interference error code, influence control accuracy
And cause camera lens not compact, unsightly.
Utility model content
In view of the shortcomings of the prior art, the utility model proposes a kind of closed-loop automatic variable power lens.
The closed-loop automatic variable power lens of above-mentioned technical problem are can solve the problem that, its technical scheme includes coaxially forward and backward solid
Determine constituent element and with the zoom constituent element and compensation constituent element, the zoom constituent element and compensation group being located between forward and backward fixed constituent element
Member is on the multiplying power regulating device that the two can be made to be moved along axle by setting track, except that the multiplying power regulating device bag
Sliding equipment and travel mechanism are included, wherein,
1st, the sliding equipment includes matching somebody with somebody parallel to axially arranged left and right line slideway and with left and right line slideway
Slide after slide and right line slideway before slide and right line slideway after slide and left line slideway before the left line slideway closed,
The zoom constituent element is installed on before left line slideway before slide and right line slideway on slide and compensates constituent element and be installed on left straight line
After guide rail after slide and right line slideway on slide.
2nd, the travel mechanism is included in left and right line slideway side parallel to axially arranged zoom helical axis, described
Zoom helicla flute and compensation helicla flute are offered on zoom helical axis, the zoom constituent element and compensation constituent element are by being correspondingly arranged
Pin is snug fit in zoom helicla flute and compensation helicla flute, and the zoom helical axis connects zoom by gear drive
Motor.
3rd, the opposite side of left and right line slideway is provided with the drive control circuit parallel to plane where left and right line slideway
Plate, in face of drive control circuit board in setting permanent magnet and magnetic grid, the permanent magnet and magnetic grid on zoom constituent element or compensation constituent element
It may be disposed on same constituent element or different constituent elements, sensing permanent magnet be provided with and detection system zero-bit in drive control circuit board
Hall switch chip obtains the detection chip of displacement with magnetic grid is sensed.
4th, the leading-out terminal of the drive control circuit board passes through connection zoom motor, the inlet wire of drive control circuit board
End connects PC and external power supply by signal wire.
Further, the signal wire of the control board end of incoming cables connects PC and external electricity by six pin aviation sockets
Source.
Further, the zoom motor is located at the side of zoom helical axis, and the six pins aviation socket is located at zoom spiral shell
The opposite side of spin axis.
A kind of structure of the gear drive includes the driver pinion engaged and driven gear wheel, the active are small
Gear is installed on the output shaft of zoom motor, and the driven gear wheel is coaxially connected with zoom helical axis.
The beneficial effects of the utility model：
The utility model precision is high, and zoom is reproducible, and mechanism operates steadily, long lifespan, and technique is simple.
Brief description of the drawings
Fig. 1 is a kind of structural representation of embodiment of the utility model.
Fig. 2 is the A-A sectional views in Fig. 1.
Fig. 3 is the B-B sectional views in Fig. 1.
Fig. 4 is the C-C sectional views in Fig. 1.
Figure number identifies：1st, preceding fixed constituent element；2nd, constituent element is fixed afterwards；3rd, zoom constituent element；4th, constituent element is compensated；5th, left straight line is led
Rail；6th, right line slideway；7th, slide before left line slideway；8th, slide after left line slideway；9th, slide before right line slideway；10、
Slide after right line slideway；11st, zoom helical axis；12nd, zoom motor；13rd, drive control circuit board；14th, permanent magnet；15th, magnetic
Grid；16th, six pin aviation socket；17th, lens base；18th, pin；19th, bearing.
Embodiment
Illustrated embodiment is described further to the technical solution of the utility model below in conjunction with the accompanying drawings.
The utility model closed-loop automatic variable power lens, and its structure is included before being coaxially disposed based on lens base 17 admittedly
Determine constituent element 1, rear fixed constituent element 2, zoom constituent element 3 and compensation constituent element 4.
Fixed constituent element 1 is installed in the front end of lens base 17 before described, after fixed constituent element 2 is installed in lens base 17 after described
End, the zoom constituent element 3 and compensation constituent element 4 it is forward and backward be located at forward and backward fixed constituent element 1,2 between and be installed in lens base 17
Multiplying power regulating device on, as shown in Figure 1 and Figure 2.
Sliding equipment in the multiplying power regulating device includes left and right linear motion guide rail pair, i.e., left and right line slideway 5,
6 and the left line slideway that coordinates with left and right line slideway 5,6 before after slide 7 and left line slideway slide 8 and right straight line lead
Slide 10 after slide 9 and right line slideway before rail, the zoom constituent element 3 are installed on slide 7 and right straight line before left line slideway and led
Before rail on slide 9, the compensation constituent element 4 is installed on after left line slideway after slide 8 and right line slideway on slide 10, the benefit
Repay the top of constituent element 4 and be provided with Miniature permanent magnet body 14 and axial magnetic grid 15；Travel mechanism in multiplying power regulating device is included in left and right straight
Line guide rail 5,6 bottom centers pass through parallel to axially arranged zoom helical axis 11, the forward and backward shaft end of the zoom helical axis 11
Bearing 19 is installed on the front and back ends of lens base 17, and track is specifically axially moved corresponding to zoom constituent element 3 in zoom helical axis
Zoom helicla flute is offered on 9, being specifically axially moved track corresponding to compensation constituent element 4, (matching zoom constituent element 3 is axially moved rail
The movement of mark) in offering compensation helicla flute on zoom helical axis 11, the bottom of zoom constituent element 3 is provided with pin 18, the pin 18
It is slidably fitted in zoom helicla flute, compensation constituent element 4 bottom also is provided with pin 18, and the pin 18 is slidably fitted in compensation helicla flute
It is interior；The zoom helical axis 11 is driven in the zoom motor 12 in lens base 17 by the side of zoom helical axis 11
(can use direct current generator), the zoom motor 12 connects zoom spiral shell by the driver pinion of a pair of meshing with driven gear wheel
Spin axis 11, as shown in Figure 1, Figure 2, Figure 3, Figure 4.
Driving is provided with the lens base 17 of the left and right top of line slideway 5,6 (higher than zoom constituent element 3 and compensating constituent element 4)
Control board 13, the drive control circuit board 13 is parallel to left and right line slideway 5,6 place planes, drive control circuit
The bottom of plate 13 is provided with sensing permanent magnet 14 and the Hall switch chip of detection system " zero-bit " obtains position with magnetic grid 15 is sensed
The detection chip of shifting amount, the leading-out terminal of drive control circuit board 13 pass through connection zoom motor 12；With the phase of zoom motor 12
Symmetrically, six pin aviation sockets 16, the signal wire of the end of incoming cables of drive control circuit board 13 are set by the opposite side of zoom helical axis 11
PC and external power supply are connected by six pin aviation sockets 16, as shown in Figure 2 and Figure 3.
Working method of the present utility model is：
During zoom, PC sends zoom instruction by concatenating communication port, and drive control circuit board 13 drives zoom motor 12
Rotate, zoom motor 12 drives zoom helical axis 11 to rotate, and zoom helical axis 11 drives zoom constituent element 3 by corresponding pin 18
Moved vertically by particular track with compensation constituent element 4, the detection chip on drive control circuit board 13 compensates constituent element 4 by detecting
On magnetic grid 15 obtain displacement, the Hall switch chip on drive control circuit board 13 passes through detects on compensation constituent element 4
Permanent magnet 14 obtains system zero-bit (initial position).
The zoom constituent element 3 or compensation constituent element 4 have only relative to the displacement of system zero-bit and the enlargement ratio of system
One corresponding relation, control circuit realize the automatic zoom of closed-loop by controlling the displacement of zoom constituent element 3 or compensation constituent element 4.
Claims (4)
1. closed-loop automatic variable power lens, including coaxial forward and backward fixed constituent element (1,2) and with being located in forward and backward fixed group
Zoom constituent element (3) and compensation constituent element (4) between first (1,2), the zoom constituent element (3) and compensation constituent element (4), which are located at, can make two
Person is along axle by the multiplying power regulating device that moves of setting track, it is characterised in that：The multiplying power regulating device includes sliding equipment
And travel mechanism, wherein,
1., the sliding equipment include parallel to axially arranged left and right line slideway (5,6) and with left and right line slideway
(5,6) before the left line slideway coordinated after slide (7) and left line slideway before slide (8) and right line slideway slide (9) and
Slide (10) after right line slideway, it is advancing slip that the zoom constituent element (3) is installed on slide (7) and right line slideway before left line slideway
Constituent element (4) is compensated on seat (9) to be installed on after left line slideway after slide (8) and right line slideway on slide (10)；
2., the travel mechanism be included in left and right line slideway (5,6) side parallel to axially arranged zoom helical axis
(11) zoom helicla flute and compensation helicla flute, the zoom constituent element (3) and compensation group, are offered on the zoom helical axis (11)
First (4) are snug fit in zoom helicla flute and compensation helicla flute by the pin (18) being correspondingly arranged, the zoom helical axis
(11) zoom motor (12) is connected by gear drive；
3., the opposite side of left and right line slideway (5,6) be provided with driving control parallel to plane where left and right line slideway (5,6)
Circuit board (13) processed, in face of drive control circuit board (13) in setting permanent magnet (14) on zoom constituent element (3) or compensation constituent element (4)
With magnetic grid (15), the permanent magnet (14) and magnetic grid (15) are arranged on same constituent element or different constituent elements, in drive control circuit
Plate (13) is provided with sensing permanent magnet (14) and the Hall switch chip of detection system zero-bit obtains position with magnetic grid (15) is sensed
The detection chip of shifting amount；
4., the leading-out terminal of the drive control circuit board (13) pass through connection zoom motor (12), drive control circuit board
(13) end of incoming cables connects PC and external power supply by signal wire.
2. closed-loop automatic variable power lens according to claim 1, it is characterised in that：Control board (13) inlet wire
The signal wire at end connects PC and external power supply by six pin aviation sockets (16).
3. closed-loop automatic variable power lens according to claim 2, it is characterised in that：The zoom motor (12) is located at change
The side of times helical axis (11), the six pins aviation socket (16) are located at the opposite side of zoom helical axis (11).
4. the closed-loop automatic variable power lens according to any one in claims 1 to 3, it is characterised in that：The gear
Transmission mechanism includes the driver pinion of engagement and driven gear wheel, the driver pinion are installed on the defeated of zoom motor (12)
On shaft, the driven gear wheel is coaxial connected with zoom helical axis (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721202754.0U CN207181788U (en) | 2017-09-19 | 2017-09-19 | Closed-loop automatic variable power lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721202754.0U CN207181788U (en) | 2017-09-19 | 2017-09-19 | Closed-loop automatic variable power lens |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207181788U true CN207181788U (en) | 2018-04-03 |
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ID=61746858
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721202754.0U Active CN207181788U (en) | 2017-09-19 | 2017-09-19 | Closed-loop automatic variable power lens |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207181788U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108519652A (en) * | 2018-05-23 | 2018-09-11 | 福州鑫图光电有限公司 | A kind of optical zoom driving mechanism |
| CN109188645A (en) * | 2018-10-16 | 2019-01-11 | 桂林弗克斯光电仪器有限公司 | Two groups of linkage automatic variable power lens of bi-motor full closed loop control |
-
2017
- 2017-09-19 CN CN201721202754.0U patent/CN207181788U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108519652A (en) * | 2018-05-23 | 2018-09-11 | 福州鑫图光电有限公司 | A kind of optical zoom driving mechanism |
| CN109188645A (en) * | 2018-10-16 | 2019-01-11 | 桂林弗克斯光电仪器有限公司 | Two groups of linkage automatic variable power lens of bi-motor full closed loop control |
| CN109188645B (en) * | 2018-10-16 | 2024-05-07 | 桂林弗克斯光电仪器有限公司 | Double-motor full-closed-loop controlled two-group linkage automatic zoom lens |
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