CN1847909A - Zoom lens device - Google Patents
Zoom lens device Download PDFInfo
- Publication number
- CN1847909A CN1847909A CN200510041958.6A CN200510041958A CN1847909A CN 1847909 A CN1847909 A CN 1847909A CN 200510041958 A CN200510041958 A CN 200510041958A CN 1847909 A CN1847909 A CN 1847909A
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- Prior art keywords
- zoom lens
- rotating shaft
- lens unit
- worm gear
- unit according
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- 230000003287 optical effect Effects 0.000 abstract description 9
- 230000010405 clearance mechanism Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
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Abstract
The invention relates to a zoom lens device. The zoom lens group comprises a lens box 9, a zoom lens group 1, a motor 19, a worm wheel 12, a worm 13 and a rotating shaft 10, wherein the rotating shaft 10 is arranged in the lens box 9 through a bearing 4, the worm wheel 12 is arranged on the rotating shaft 10, the motor 19 is connected with the worm wheel 12 through the worm 13, and the rotating shaft 10 penetrates through a rotating center 2 of the zoom lens group 1. The invention solves the technical problems of unstable work and small magnification of the optical system adopting the zoom objective lens in the background technology.
Description
One, technical field
The present invention relates to a kind of optical instrument, especially a kind of Zoom lens unit.
Two, background technology
In optical field, when optical viewer is searched for and aimed at moving target, wish that visual field and enlargement ratio are all bigger, this is unapproachable technically.The normal for this reason optical system that becomes times object lens that adopts, the enlargement ratio that changes instrument is to adapt to the observation needs.
The optical system that present employing becomes times object lens mainly adopts manual mode, and it is to control by crank and rocker mechanism and connecting rod and spring to become times object lens, and its job insecurity and enlargement ratio are little.
Three, summary of the invention
The invention solves the job insecurity and the little technical matters of enlargement ratio of the optical system existence of the employing change times object lens in the background technology.
Technical solution of the present invention is: the present invention is a kind of Zoom lens unit, its special character is: this device comprises mirrored cabinet 9, becomes times mirror group 1, motor 19, worm gear 12, worm screw 13 and rotating shaft 10, rotating shaft 10 is arranged in the mirrored cabinet 9 by bearing 4, worm gear 12 is arranged in the rotating shaft 10, motor 19 connects with worm gear 12 by worm screw 13, and the center of rotation 2 that becomes times mirror group 1 is passed in rotating shaft 10.
An above-mentioned change times mirror group 1 comprises outer picture frame 5, is disposed with short focus objective lens 16,15,14,8,7 in the outer picture frame 5, and short focus objective lens 16,15,14 is arranged on rotating shaft 10 1 sides, and short focus objective lens 8,7 is arranged on the opposite side of rotating shaft 10.
In the picture frame 6, interior picture frame 6 was arranged in the outer picture frame 5 in above-mentioned short focus objective lens 8,7 was arranged on.
Also be provided with microswitch 20 and pull bar 21 on the above-mentioned worm gear 12.
Above-mentioned motor 19 connects with worm screw 13 by friction pulley 18, friction pulley 18 by recessed take turns 24 and cone pulley 25 constitute, cone pulley 25 is nested in recessed the wheel in 24, cone pulley 25 connects with worm screw 13, recessedly takes turns 24 and connects with motor 19.
Be provided with extension spring 17 in the above-mentioned worm gear 12.
The mirrored cabinet 9 of above-mentioned change times mirror group 1 one sides is provided with limited block 23.
Above-mentioned limited block 23 is provided with cushion block 22 near a side that becomes times mirror group 1.
Above-mentioned bearing 4 is arranged on the mirrored cabinet 9 by bearing seat 3.
Above-mentioned worm gear 12 belows are provided with lower wall 11.
The present invention adopts and be interrupted to become principle doubly, with the way of changing object lens light group, makes the instrument enlargement ratio by another numerical value of changing into of a numerical value great-jump-forward, and enlargement ratio is big; The present invention simultaneously adopts electronic mode, and is provided with stop means and close positioning device, is provided with the clearance mechanism that disappears between worm and gear simultaneously, has therefore guaranteed the stability of work of the present invention.
Four, description of drawings
Fig. 1 is a structural representation of the present invention;
Fig. 2 is that the A of Fig. 1 is to view;
Fig. 3 becomes the optical texture synoptic diagram of times mirror group for the present invention.
Drawing reference numeral is described as follows:
1-become that times mirror group, 2-center of rotation, 3-bearing seat, 4-bearing 5-outer picture frame, 6-interior picture frame, 7-weak point focus objective lens, 8-weak point focus objective lens, 9-mirrored cabinet, 10-rotating shaft, 11-lower wall, 12-worm gear, 13-worm screw, 14-weak point focus objective lens, 15-weak point focus objective lens, 16-weak point focus objective lens, 17-extension spring, 18-friction pulley, 19-motor, 20-microswitch, 21-pull bar, 22-cushion block, 23-limited block, 24-recessed are taken turns, 25-cone pulley.
Five, embodiment
Referring to Fig. 1,2, the present invention includes mirrored cabinet 9, become times mirror group 1, motor 19, worm gear 12, worm screw 13 and rotating shaft 10.Rotating shaft 10 is arranged in the mirrored cabinet 9 by bearing 4, and bearing 4 is arranged on the mirrored cabinet 9 by bearing seat 3.Worm gear 12 is arranged in the rotating shaft 10; motor 19 connects with worm gear 12 by worm screw 13; motor 19 also can connect with worm screw 13 by friction pulley 18, friction pulley 18 by recessed take turns 24 and cone pulley 25 constitute, cone pulley 25 is nested in recessed the wheel in 24; cone pulley 25 connects with worm screw 13; recessedly take turns 24 and linked to each other by taper pin with motor 19, the characteristics of selecting friction gearing moment for use are if the moment that needs to transmit when big, occurs between two friction pulleys sliding relatively; then can realize protection automatically, unlikely appearance overload phenomenon to motor 19.Times mirror group 1 comprises outer picture frame 5, be disposed with short focus objective lens 16,15,14,8,7 in the outer picture frame 5, the center of rotation 2 that becomes times mirror group 1 is passed in rotating shaft 10, short focus objective lens 16,15,14 is arranged on rotating shaft 10 1 sides, short focus objective lens 8,7 is arranged on the opposite side of rotating shaft 10, in the picture frame 6, is arranged in the outer picture frame 5 in short focus objective lens 8,7 is arranged on, picture frame 6 in stirring by adjusting, can make short burnt image planes to long burnt image planes heavy and.Also be provided with microswitch 20 and pull bar 21 on the worm gear 12, worm gear 12 belows are provided with lower wall 11, and the mirrored cabinet 9 that becomes times mirror group 1 one sides is provided with limited block 23.Limited block 23 is provided with cushion block 22 near a side that becomes times mirror group 1, and when a change times mirror group 1 was rotated counterclockwise 90 °, pull bar 21 contacted with microswitch 20, send electric signal, become times mirror group 1 collision limited block 14 then, carry out mechanical positioning, cushion block 22 guarantees accurate positioning.Being provided with extension spring 17 in the worm gear 12, to eliminate backlash, making worm gear 12 in the course of the work with extension spring 17 division worm gear control running clearances, is the single face contact all the time, though there is sideshake to exist, has eliminated the influence of sideshake to backlash.Motor 19 adopts small and special electric machines to drive worm gears 12 worm screws 13, becomes 1 incision of times mirror group and cuts out light path thereby drive, and guarantees that mechanical structures is light and handy, practical, nimbly and freely.
Referring to Fig. 3, weak point focus objective lens 16,15,14 is formed negative group 1, and short focus objective lens 8,7 compositions are just organizing 1, are directional light between them.Realize long and short burnt image planes unanimity along mobile just group of the whole group of optical axis.Shown position is the short-focus mirror group, and other object lens of these five mirrors and system are formed short burnt light path.When this five mirrors during along center of rotation 2 half-twists, these five mirrors not in the light path of system, other objective lens of system burnt light path of growing up.
Claims (10)
1, a kind of Zoom lens unit, it is characterized in that: this device comprises mirrored cabinet (9), becomes times mirror group (1), motor (19), worm gear (12), worm screw (13) and rotating shaft (10), described rotating shaft (10) is arranged in the mirrored cabinet (9) by bearing (4), described worm gear (12) is arranged in the rotating shaft (10), described motor (19) connects with worm gear (12) by worm screw (13), and the center of rotation (2) that becomes times mirror group (1) is passed in described rotating shaft (10).
2, Zoom lens unit according to claim 1, it is characterized in that: a described change times mirror group (1) comprises outer picture frame (5), be disposed with short focus objective lens (16,15,14,8,7) in the described outer picture frame (5), described short focus objective lens (16,15,14) is arranged on rotating shaft (10) one sides, and described short focus objective lens (8,7) is arranged on the opposite side of rotating shaft (10).
3, Zoom lens unit according to claim 2 is characterized in that: described short focus objective lens (8,7) is arranged in the interior picture frame (6), and described interior picture frame (6) is arranged in the outer picture frame (5).
4, according to claim 1 or 2 or 3 described Zoom lens units, it is characterized in that: also be provided with microswitch (20) and pull bar (21) on the described worm gear (12).
5, Zoom lens unit according to claim 4, it is characterized in that: described motor (19) connects with worm screw (13) by friction pulley (18), described friction pulley (18) is made of recessed wheel (24) and cone pulley (25), described cone pulley (25) is nested in recessed wheel the (24), described cone pulley (25) connects with worm screw (13), and described recessed wheel the (24) connects with motor (19).
6, want 5 described Zoom lens units according to right, it is characterized in that: be provided with extension spring (17) in the described worm gear (12).
7, Zoom lens unit according to claim 6 is characterized in that: the mirrored cabinet (9) of described change times mirror group (1) one side is provided with limited block (23).
8, Zoom lens unit according to claim 7 is characterized in that: described limited block (23) is provided with cushion block (22) near a side that becomes times mirror group (1).
9, Zoom lens unit according to claim 8 is characterized in that: described bearing (4) is arranged on the mirrored cabinet (9) by bearing seat (3).
10, Zoom lens unit according to claim 4 is characterized in that: described worm gear (12) below is provided with lower wall (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200510041958.6A CN1847909A (en) | 2005-04-15 | 2005-04-15 | Zoom lens device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200510041958.6A CN1847909A (en) | 2005-04-15 | 2005-04-15 | Zoom lens device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1847909A true CN1847909A (en) | 2006-10-18 |
Family
ID=37077531
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200510041958.6A Pending CN1847909A (en) | 2005-04-15 | 2005-04-15 | Zoom lens device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1847909A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102565995A (en) * | 2011-12-29 | 2012-07-11 | 中国科学院长春光学精密机械与物理研究所 | High-precision multi-tooth dividing plate magnification changing mechanism in optical system |
| CN108120508A (en) * | 2016-11-30 | 2018-06-05 | 北京航天计量测试技术研究所 | A kind of incision suitable for the empty burnt correction of infrared imaging load cuts out device |
-
2005
- 2005-04-15 CN CN200510041958.6A patent/CN1847909A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102565995A (en) * | 2011-12-29 | 2012-07-11 | 中国科学院长春光学精密机械与物理研究所 | High-precision multi-tooth dividing plate magnification changing mechanism in optical system |
| CN102565995B (en) * | 2011-12-29 | 2013-08-21 | 中国科学院长春光学精密机械与物理研究所 | High-precision multi-tooth dividing plate magnification changing mechanism in optical system |
| CN108120508A (en) * | 2016-11-30 | 2018-06-05 | 北京航天计量测试技术研究所 | A kind of incision suitable for the empty burnt correction of infrared imaging load cuts out device |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |