CN103744163A - High-precision view field switching mechanism - Google Patents
High-precision view field switching mechanism Download PDFInfo
- Publication number
- CN103744163A CN103744163A CN201310718010.4A CN201310718010A CN103744163A CN 103744163 A CN103744163 A CN 103744163A CN 201310718010 A CN201310718010 A CN 201310718010A CN 103744163 A CN103744163 A CN 103744163A
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- China
- Prior art keywords
- cam
- lens cone
- lens barrel
- precision
- switching mechanism
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Abstract
The invention relates to a high-precision view field switching mechanism. A mobile lens cone is sleeved in the front end of a main lens cone body; a cam is sleeved outside the main lens cone body by steel balls; a guide slot cooperating with the cam is arranged at the external cylindrical surface of the main lens cone body; and the cam is fixed with the mobile lens cone by a bolt. When the cam rotates forwardly or backwardly, the mobile lens cone can be driven to make reciprocating rectilinear movement. The provided mechanism has the advantages of low processing/driving/transmission control requirement, low cost, and high precision.
Description
Technical field
The invention belongs to lens zoom field, particularly a kind of visual field switching mechanism.
Background technology
In zoom lens field, realize mechanism's mode of switching visual field and mainly contain three kinds: 1 stepper motor and precision lead screw mechanism at present; 3 supersonic motors add gear train, 3 servo direct current motor and cam mechanism.Stepper motor and precision lead screw mechanism are for the visual field switching mechanism not high to accuracy requirement, and the rear motor that puts in place in visual field has " overshoot " phenomenon, the position of easily departing from requirement.Although supersonic motor has, precision is high, can keep after power-off moment to stop at the position of requirement, and supersonic motor is used in still immature in this kind of environment at home at present.All the time, traditional servo direct current motor and cam mechanism are used in a lot of zoom lens, and wherein minority is no lack of and has also realized higher transmission accuracy, why can realize high precision, control accuracy and transmission accuracy are required very high, have improved cost thereupon.
Summary of the invention
In order to overcome the shortcoming of prior art, the invention provides a kind of high-precision visual field switching mechanism, it requires low to processing, driving, transmission control, and cost is low, and precision is high.
The present invention solves the technical scheme that its technical matters takes: the front end inner sleeve of main body lens barrel has mobile lens barrel, main body lens barrel front end is outer has cam by steel ball sleeve, on the external cylindrical surface of main body lens barrel, there is the gathering sill coordinating with cam, cam is fixed by screw and mobile lens barrel, during the positive and negative rotation of cam, can drive mobile lens barrel to do linear reciprocating motion.
1), reduced the requirement to control technology the present invention has following advantages:; 2), reduced the requirement that zoom mechanism is debug; 3), reduced the requirement to drive motor; 4), improved the processing technology of cam parts.
Accompanying drawing explanation
Fig. 1 is cut-open view of the present invention;
Fig. 2 is cam stretch-out view of the present invention.
Embodiment
Below in conjunction with drawings and Examples, the present invention is further described.
As shown in Figure 1, 2, the front end inner sleeve of main body lens barrel 1 has mobile lens barrel 2, main body lens barrel 1 front end is outer has cam 3 by steel ball 5 covers, on the external cylindrical surface of main body lens barrel 1, there is the gathering sill 7 coordinating with cam 3, cam 3 is fixing with mobile lens barrel 2 by screw 4, during the positive and negative rotation of cam, can drive mobile lens barrel 2 to do linear reciprocating motion.
The two ends of described gathering sill 7 are the forward and backward locating slot 6,8 of linearity.
In the process of working groove, key is controlled the axial dimension precision of two sections of straight-line grooves, and by current level of processing, the dimensional accuracy of this mode can not be greater than 0.01mm, and in general optical system, permissible accuracy is 0.02mm.When the gathering sill 7 of cam 3 rotates to forward and backward locating slot 6,8, namely arrive after the field positions requiring, even if there be " overshoot " of the error of control system, the error of gear train and motor, owing to there being forward and backward locating slot 6,8, mobile lens barrel 2 axially on can remain on former field positions always, equally also can not be subject to debuging error and have influence on switching precision, a lot of error links in the middle of having avoided, have realized high-precision visual field and have switched.
Claims (2)
1. a high-precision visual field switching mechanism, it is characterized in that: the front end inner sleeve of main body lens barrel (1) has mobile lens barrel (2), main body lens barrel (1) front end has cam (3) by steel ball (5) cover outward, on the external cylindrical surface of main body lens barrel (1), have the gathering sill (7) coordinating with cam (3), cam (3) is fixing by screw (4) and mobile lens barrel (2).
2. high-precision visual field according to claim 1 switching mechanism, is characterized in that: the forward and backward locating slot that the two ends of described gathering sill (7) are linearity (6,8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310718010.4A CN103744163A (en) | 2013-12-20 | 2013-12-20 | High-precision view field switching mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310718010.4A CN103744163A (en) | 2013-12-20 | 2013-12-20 | High-precision view field switching mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103744163A true CN103744163A (en) | 2014-04-23 |
Family
ID=50501197
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310718010.4A Pending CN103744163A (en) | 2013-12-20 | 2013-12-20 | High-precision view field switching mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103744163A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108646375A (en) * | 2018-07-09 | 2018-10-12 | 云南北方驰宏光电有限公司 | A kind of knob infrared lens focus adjusting mechanism |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1395126A (en) * | 2001-06-28 | 2003-02-05 | 奥林巴斯光学工业株式会社 | Lens barrel |
| CN1685266A (en) * | 2002-09-30 | 2005-10-19 | 松下电器产业株式会社 | Collapsible mount type lens barrel and optical equipment using the same |
| US20100165481A1 (en) * | 2008-12-27 | 2010-07-01 | Premier Image Technology(China) Ltd. | Compact zoom lens |
-
2013
- 2013-12-20 CN CN201310718010.4A patent/CN103744163A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1395126A (en) * | 2001-06-28 | 2003-02-05 | 奥林巴斯光学工业株式会社 | Lens barrel |
| CN1685266A (en) * | 2002-09-30 | 2005-10-19 | 松下电器产业株式会社 | Collapsible mount type lens barrel and optical equipment using the same |
| US20100165481A1 (en) * | 2008-12-27 | 2010-07-01 | Premier Image Technology(China) Ltd. | Compact zoom lens |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108646375A (en) * | 2018-07-09 | 2018-10-12 | 云南北方驰宏光电有限公司 | A kind of knob infrared lens focus adjusting mechanism |
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Legal Events
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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 |
Application publication date: 20140423 |