CN102937737B - Magnification shifting device for three-gear zoom lens - Google Patents
Magnification shifting device for three-gear zoom lens Download PDFInfo
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- CN102937737B CN102937737B CN201210448697.XA CN201210448697A CN102937737B CN 102937737 B CN102937737 B CN 102937737B CN 201210448697 A CN201210448697 A CN 201210448697A CN 102937737 B CN102937737 B CN 102937737B
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Abstract
The invention relates to a magnification shifting device for a three-gear zoom lens. The magnification shifting device comprises a support casing and a shifting mechanism installed inside the support casing, and the upper portion and the lower portion of the shifting mechanism are connected with a transmission chain on the outside through shaft holes on an upper casing wall and a lower casing wall of the support casing. A rotation shifting group comprises a short rotation frame, a middle focus rotation frame, a short focus rotation frame and a middle focus rotation shaft, driving input ends of the two rotation shafts are correspondingly connected with a short focus driving motor and a middle focus driving motor through the transmission chain respectively, a short focus rotation shaft is connected with the short focus driving motor, and the middle focus rotation shaft is connected with the middle focus driving motor. The magnification shifting device has the advantages of 1 being concise and compact and reducing shifting device quantity and volume weight; and 2 enabling two rotation frames to individually drive, individually locate and accurately locate, enabling shifting angles to be smaller than 90 degrees, and being capable rapidly shifting to achieve tracks and captures of a lens on targets.
Description
Technical field
The present invention relates to a kind of multiplying power switching device shifter for third gear zoom lens, belong to technical field of optical instrument, be applicable to the infrared lens of third gear zoom function, be particularly useful for requiring in 1 second, and the infrared zooming lens switched fast between third gear.
Background technology
At present, the demand of the infrared lens having third gear zoom function is got more and more, for the observation to target, tracking, seizure etc.The Zooming method of this camera lens relies on switching device shifter to switch between third gear exactly.Have the switching device shifter for third gear zoom in the prior art, but these switching device shifter complexity are loaded down with trivial details, cause infrared lens bulky, and switch speed is slow, causing can not tracking target, also makes track rejection.
Summary of the invention
The object of the invention is to: the deficiency existed for prior art, provides a kind of for the multiplying power switching device shifter in third gear zoom lens, not only simple and compact for structure, and switch rapidly, registration.
Technical scheme of the present invention is:
For a multiplying power switching device shifter for third gear zoom lens, comprise front end can with the front portion of camera lens and support housing that rear end can be connected with the afterbody of camera lens and the switching mechanism being arranged on support housing inside; This switching mechanism upper and lower is connected with outside driving-chain with the axis hole on lower shell wall respectively by the upper shell wall of support housing, and these two driving-chains are upper driving chain and underdrive chain respectively; Described switching mechanism comprises angle bearing group and is connected to the rotation switch groups in angle bearing group; Described rotation switch groups comprises two rotating frames and two rotating shafts, respectively: short rotating frame and middle burnt rotating frame and short burnt rotating shaft and middle burnt rotating shaft; The driving input end of two rotating shafts is connected with two drive motor by driving-chain is corresponding respectively, and these two drive motor are: short burnt drive motor and middle burnt drive motor; Short burnt rotating shaft is connected with short burnt drive motor, and middle burnt rotating shaft is connected with middle burnt drive motor.
In technique scheme, described short burnt rotating frame is sleeved on the inside of middle burnt rotating frame, and can independently rotate; Described short burnt shaft axis and middle burnt shaft axis coincide as common axis, and this common axis and optical axis intersect vertically; Short burnt rotating shaft is connected with the top of two rotating frames, and middle burnt rotating shaft is connected with the bottom of two rotating frames.
In technique scheme, described short burnt rotating shaft is connected with the top of two rotating frames and is: short burnt rotating shaft is fixedly connected with short burnt rotating frame, and is rotationally connected with middle burnt rotating frame; Middle burnt rotating shaft is connected with the bottom of two rotating frames: middle burnt rotating shaft is fixedly connected with middle burnt rotating frame, and is rotationally connected with short burnt rotating frame.
In technique scheme, described upper driving chain and underdrive chain are gear reduced drive chain; In upper driving chain, be provided with upper limit driving lever, in underdrive chain, be provided with lower limit driving lever.
In technique scheme, described upper driving chain has the 3rd gear, the side of the 3rd gear is provided with the first short burnt mechanical position limitation block and the first short burnt limit switch, and opposite side is provided with the second short burnt mechanical position limitation block and the second short burnt limit switch; Underdrive chain has first gear, the side of this first gear to be provided with in first burnt limit switch in burnt mechanical position limitation block and first, and opposite side to be provided with burnt mechanical position limitation block and the second short burnt limit switch in second.
In technique scheme, described short burnt drive motor is connected with the second gear be positioned on outside lower shell wall, for driving the first gear; Middle burnt drive motor is connected with the 4th gear be positioned on outside upper shell wall, for driving the 3rd gear.
In technique scheme, described short burnt drive motor and middle burnt drive motor are all provided with overload protecting mechanism.
In technique scheme, described short burnt rotating frame is provided with short burnt Zoom lens, middle burnt rotating frame is provided with middle burnt Zoom lens; Each angle bearing group comprises bearing seat and two angle bearings; Each rotating shaft is connected with angle bearing by gland nut.
The course of work of the present invention is: after startup and shutdown, camera lens self-inspection makes two rotating frames automatically be positioned at the both sides of optical axis, the angle of each rotating frame and optical axis is all less than 90 °, such camera lens is just in focal length shelves, and middle burnt rotating frame when proceeding to optical axis camera lens be just in middle burnt shelves, when short burnt rotating frame proceeds to optical axis, camera lens is just in short burnt shelves.When camera lens needs to be changed to middle burnt shelves or short burnt shelves from focal length shelves, a corresponding drive motor rotates, make corresponding rotating frame rotate the angle being less than 90 ° and proceed to optical axis position, mechanical position limitation block accurately limits the numerical value of rotational angle, spacing driving lever touches limit switch simultaneously, limit switch transmission of signal makes drive motor stop operating thus completes the switching of focal length shelves to middle burnt shelves or short burnt shelves, and the drive motor that now control circui makes this operate can only reverse next time.When therefrom burnt shelves are changed to short burnt shelves to camera lens needs, two drive motor rotate simultaneously, wherein, burnt rotating frame leaves optical axis, and short burnt rotating frame proceeds to optical axis, two rotating frames respectively rotate the angle being less than 90 °, two each self-corresponding mechanical position limitation blocks of rotating frame accurately limit the numerical value of each rotating frame rotational angle, the spacing driving lever of each correspondence touches limit switch simultaneously, limit switch transmission of signal makes drive motor stop operating thus completes therefrom that burnt shelves are to the switching of short burnt shelves, and now control circui makes two drive motor can only reverse next time.Be changed to middle burnt shelves from short burnt shelves and be changed to short burnt shelves in like manner with therefrom burnt shelves.When therefrom burnt shelves are changed to focal length shelves to needs, the drive motor of middle burnt shelves correspondence rotates, make middle burnt rotating frame rotate the angle being less than 90 ° and leave optical axis position, mechanical position limitation block accurately limits the numerical value of rotational angle, spacing driving lever touches limit switch simultaneously, limit switch transmission of signal makes drive motor stop operating thus completes therefrom that burnt shelves are to the switching of focal length shelves, and the drive motor that now control circui makes this operate can only reverse next time.Be changed to focal length shelves from short burnt shelves and be changed to focal length shelves in like manner with therefrom burnt shelves.Because the rotating distance of two rotating frames is all less than 90 °, and the transmission speed of driving-chain is fast, so can complete the quick switching between third gear in 1 second.
The invention has the beneficial effects as follows: 1, rotate two rotating frame coaxial lines in switch groups, be set with mutually, and be placed in support housing inside, so concision and compact, directly reduce the volume weight of switching device shifter thus effectively reduce the volume weight of infrared lens; 2, two rotating frame drive, location-independent and registration, handoff angle are less than 90 °, so can complete the quick switching between third gear in 1 second thus meet camera lens to the tracking of target and seizure.
Accompanying drawing explanation
Fig. 1 is the infrared lens cut-open view of application one embodiment of the invention.
Fig. 2 is the stereographic map of one embodiment of the invention.
Fig. 3 is the stereographic map of switching mechanism in one embodiment of the invention and driving-chain.
Fig. 4 is the positive view of one embodiment of the invention.
Fig. 5 is the upward view of Fig. 4.
Fig. 6 is the vertical view of Fig. 4.
In figure, each component Reference numeral is: 1-is anterior, 01-switching mechanism, 2-optical axis, 3-common axis, 4-afterbody, 5-support housing, the upper shell wall of 5.1-, shell wall under 5.2-, 5.3-upper driving chain, 5.4-underdrive chain, the short burnt mechanical position limitation block of 6-first, the short burnt limit switch of 7-first, 8-the 3rd gear, 9-the 4th gear, 10-upper limit driving lever, 10 '-lower limit driving lever, the short burnt limit switch of 11-second, the short burnt mechanical position limitation block of 12-second, burnt drive motor in 13-, burnt rotating frame in 14-, burnt Zoom lens in 15-, the short burnt rotating frame of 16-, the short burnt Zoom lens of 17-, the short burnt drive motor of 18-, 19-second gear, 20-first gear, 21-bearing seat, 22-angle bearing, 23-gland nut, the short burnt rotating shaft of 24-, burnt rotating shaft in 25-, burnt mechanical position limitation block in 26-first, burnt limit switch in 27-first, burnt limit switch in 28-second, burnt mechanical position limitation block in 29-second, 30-overload protecting mechanism.
Embodiment
It is as follows that the invention will be further described in conjunction with the accompanying drawings and embodiments:
As shown in figures 1 to 6, a kind of multiplying power switching device shifter for third gear zoom lens, comprise front end can with the front portion 1 of camera lens and support housing that rear end can be connected with the afterbody 4 of camera lens 5 and the switching mechanism 01 being arranged on support housing 5 inside; This switching mechanism 01 upper and lower is connected with outside driving-chain with the axis hole on lower shell wall 5.2 respectively by the upper shell wall 5.1 of support housing 5, and these two driving-chains are upper driving chain 5.3 and underdrive chain 5.4 respectively; Described switching mechanism 01 comprises angle bearing group and is connected to the rotation switch groups in angle bearing group; Described rotation switch groups comprises two rotating frames and two rotating shafts, respectively: short rotating frame 16 and middle burnt rotating frame 14 and short burnt rotating shaft 24 and middle burnt rotating shaft 25; The driving input end of two rotating shafts is connected with two drive motor by driving-chain is corresponding respectively, and these two drive motor are: short burnt drive motor 18 and middle burnt drive motor 13; Short burnt rotating shaft 24 is connected with short burnt drive motor 18, and middle burnt rotating shaft 25 drive motor that is connected with middle burnt drive motor 13 rotates and drives the switching of rotating frame thus the multiplying power realizing camera lens switches.Described short burnt rotating frame 16 is sleeved on the inside of middle burnt rotating frame 14, and can independently rotate; Described short burnt rotating shaft 24 axis and middle burnt rotating shaft 25 axes coincide are common axis 3, and this common axis 3 intersects vertically with optical axis 2; Short burnt rotating shaft 24 is connected with the top of two rotating frames, and middle burnt rotating shaft 25 is connected with the bottom of two rotating frames.Described short burnt rotating shaft 24 is connected with the top of two rotating frames and is: short burnt rotating shaft 24 is fixedly connected with short burnt rotating frame 16, and is rotationally connected with middle burnt rotating frame 14; Middle burnt rotating shaft 25 is connected with the bottom of two rotating frames: middle burnt rotating shaft 25 is fixedly connected with middle burnt rotating frame 14, and is rotationally connected with short burnt rotating frame 16; This connected mode is used for making each rotating frame have a positioning rotating shaft, and positive and negative rotation under the driving of another rotating shaft.Described upper driving chain 5.3 and underdrive chain 5.4 are gear reduced drive chain; Upper limit driving lever 10 is provided with in upper driving chain 5.3, lower limit driving lever 10 ' is provided with in underdrive chain 5.4, multiplying power switches the time limit position driving lever that puts in place and touches limit switch, limit switch transmission of signal makes drive motor stop operating thus completes the switching of multiplying power, and the drive motor that now control circui makes this operate can only reverse next time.Described upper driving chain 5.3 has on the side of the 3rd gear the 8, three gear 8 and is provided with the first short burnt mechanical position limitation block 6 and the first short burnt limit switch 7, and opposite side is provided with the second short burnt mechanical position limitation block 12 and the second short burnt limit switch 11; Underdrive chain 5.4 has first gear 20, the side of this first gear 20 to be provided with in first burnt limit switch 27 in burnt mechanical position limitation block 26 and first, and opposite side to be provided with burnt mechanical position limitation block 29 and the second short burnt limit switch 28 in second.Make each rotating frame forward and reversely can only turn to angle needed for zoom under the driving of rotating shaft, and accurately limited the numerical value of rotational angle by mechanical position limitation block.Described short burnt drive motor 18 is connected with the second gear 19 be positioned on outside lower shell wall 5.2, for driving the first gear 20; Middle burnt drive motor 13 is connected with the 4th gear 9 be positioned on outside upper shell wall 5.1, for driving the 3rd gear 8.Described short burnt drive motor 18 and middle burnt drive motor 13 are all provided with overload protecting mechanism 30, and this overload protecting mechanism is made up of friction shim, stage clip and nut, and when load is excessive, overload mechanism has an effect, and motor is dallied and reaches overload protection object.Described short burnt rotating frame 16 is provided with short burnt Zoom lens 17, middle burnt rotating frame 14 is provided with middle burnt Zoom lens 15; Each angle bearing group comprises bearing seat 21 and two angle bearings 22; Each rotating shaft is connected with angle bearing 22 by gland nut 23.Docked with the front portion 1 of camera lens the front end of support housing, rear end is docked with the afterbody 4 of camera lens and camera lens can be made to have third gear zoom function.
Claims of the present invention is not limited to above-described embodiment.
Claims (6)
1. the multiplying power switching device shifter for third gear zoom lens, it is characterized in that, comprising front end with the front portion of camera lens (1) and support housing (5) that rear end can be connected with the afterbody of camera lens (4) and can be arranged on the inner switching mechanism (01) of support housing (5); This switching mechanism (01) upper and lower is connected with outside driving-chain with the axis hole on lower shell wall (5.2) respectively by the upper shell wall (5.1) of support housing (5), and these two driving-chains are upper driving chain (5.3) and underdrive chain (5.4) respectively; Described switching mechanism (01) comprises angle bearing group and is connected to the rotation switch groups in angle bearing group; Described rotation switch groups comprises two rotating frames and two rotating shafts, respectively: short burnt rotating frame (16) and middle burnt rotating frame (14) and short burnt rotating shaft (24) and middle burnt rotating shaft (25); The driving input end of two rotating shafts is connected with two drive motor by driving-chain is corresponding respectively, and these two drive motor are: short burnt drive motor (18) and middle burnt drive motor (13); Short burnt rotating shaft (24) is connected with short burnt drive motor (18), and middle burnt rotating shaft (25) is connected with middle burnt drive motor (13); Described short burnt rotating frame (16) is sleeved on the inside of middle burnt rotating frame (14), and can independently rotate; Described short burnt rotating shaft (24) axis and middle burnt rotating shaft (25) axes coincide are common axis (3), and this common axis (3) and optical axis (2) intersect vertically; Short burnt rotating shaft (24) is connected with the top of two rotating frames, and middle burnt rotating shaft (25) is connected with the bottom of two rotating frames; Described short burnt rotating shaft (24) is connected with the top of two rotating frames and is: short burnt rotating shaft (24) is fixedly connected with short burnt rotating frame (16), and is rotationally connected with middle burnt rotating frame (14); Middle burnt rotating shaft (25) is connected with the bottom of two rotating frames and is: middle burnt rotating shaft (25) is fixedly connected with middle burnt rotating frame (14), and is rotationally connected with short burnt rotating frame (16).
2. the multiplying power switching device shifter for third gear zoom lens according to claim 1, is characterized in that, described upper driving chain (5.3) and underdrive chain (5.4) are gear reduced drive chain; In upper driving chain (5.3), be provided with upper limit driving lever (10), in underdrive chain (5.4), be provided with lower limit driving lever (10 ').
3. the multiplying power switching device shifter for third gear zoom lens according to claim 1, it is characterized in that, upper driving chain (5.3) has the 3rd gear (8), the side of the 3rd gear (8) is provided with the first short burnt mechanical position limitation block (6) and the first short burnt limit switch (7), and opposite side is provided with the second short burnt mechanical position limitation block (12) and the second short burnt limit switch (11); Underdrive chain (5.4) has first gear (20), the side of this first gear (20) to be provided with in first burnt limit switch (27) in burnt mechanical position limitation block (26) and first, and opposite side to be provided with burnt mechanical position limitation block (29) and the second short burnt limit switch (28) in second.
4. the multiplying power switching device shifter for third gear zoom lens according to claim 3, is characterized in that, described short burnt drive motor (18) is connected with the second gear (19) be positioned on lower shell wall (5.2) outside, for driving the first gear (20); Middle burnt drive motor (13) is connected with the 4th gear (9) be positioned on upper shell wall (5.1) outside, for driving the 3rd gear (8).
5. the multiplying power switching device shifter for third gear zoom lens according to claim 1, is characterized in that, described short burnt drive motor (18) and middle burnt drive motor (13) are all provided with overload protecting mechanism (30).
6. the multiplying power switching device shifter for third gear zoom lens according to claim 1, is characterized in that, described short burnt rotating frame (16) is provided with short burnt Zoom lens (17), and middle burnt rotating frame (14) is provided with middle burnt Zoom lens (15); Each angle bearing group comprises bearing seat (21) and two angle bearings (22); Each rotating shaft is connected with angle bearing (22) by gland nut (23).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210448697.XA CN102937737B (en) | 2012-11-12 | 2012-11-12 | Magnification shifting device for three-gear zoom lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210448697.XA CN102937737B (en) | 2012-11-12 | 2012-11-12 | Magnification shifting device for three-gear zoom lens |
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| Publication Number | Publication Date |
|---|---|
| CN102937737A CN102937737A (en) | 2013-02-20 |
| CN102937737B true CN102937737B (en) | 2015-04-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210448697.XA Active CN102937737B (en) | 2012-11-12 | 2012-11-12 | Magnification shifting device for three-gear zoom lens |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103994826A (en) * | 2014-05-26 | 2014-08-20 | 山东神戎电子股份有限公司 | Non-refrigeration thermal infrared imager capable of switching view fields |
| CN109491041B (en) * | 2018-12-10 | 2021-05-11 | 天津津航技术物理研究所 | Multiplying power switching device for three-gear zoom lens |
| CN109613786B (en) * | 2018-12-17 | 2020-10-13 | 中国科学院长春光学精密机械与物理研究所 | Camera gear linear switching device and optical camera |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6415109B1 (en) * | 1999-11-02 | 2002-07-02 | Olympus Optical Co., Ltd. | Camera and method of manufacturing camera |
| CN101065700A (en) * | 2004-11-29 | 2007-10-31 | 松下电器产业株式会社 | Zoom lens device |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3793438B2 (en) * | 2000-09-22 | 2006-07-05 | ペンタックス株式会社 | Lens movement mechanism for zoom lens system switching group |
| JP2011099979A (en) * | 2009-11-05 | 2011-05-19 | Olympus Imaging Corp | Zoom lens barrel |
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- 2012-11-12 CN CN201210448697.XA patent/CN102937737B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6415109B1 (en) * | 1999-11-02 | 2002-07-02 | Olympus Optical Co., Ltd. | Camera and method of manufacturing camera |
| CN101065700A (en) * | 2004-11-29 | 2007-10-31 | 松下电器产业株式会社 | Zoom lens device |
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