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Bidirectional electromagnetic lens driving device

A lens driving device, electromagnetic technology, applied in electromechanical devices, projection devices, printing devices, etc., can solve the problems of complex structure control circuit, high motor precision requirements, slow zoom response time, etc., to achieve simple device structure and production. Low cost and high reliability

Active Publication Date: 2014-12-24
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The control circuit of this structure is complicated, the motor precision is high, the market price is expensive, and the response time for a wide range of zooming distance is relatively slow, which limits the application of security lenses

Method used

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  • Bidirectional electromagnetic lens driving device
  • Bidirectional electromagnetic lens driving device
  • Bidirectional electromagnetic lens driving device

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Embodiment Construction

[0016] The present invention will be further described below in conjunction with the accompanying drawings.

[0017] Such as figure 1 , figure 2 As shown, a two-way electromagnetic lens driving device of the present invention includes a driving module 1 , a transmission module 2 , a lens sleeve 3 and a lens housing 4 . The driving module 1 is movably connected with the lens sleeve 3 through the transmission module 2 , the lens sleeve 3 is arranged inside the lens housing 4 , and the lower end of the driving module 1 is fixedly connected with the lens housing 4 .

[0018] The driving module 1 includes an electromagnet housing 11 , two end caps 12 , two sets of coils 13 , a movable core 14 , and two movable core guide nails 15 . The movable core 14 adopts magnetic materials such as pure iron or iron-nickel alloy, and the movable core 14 is installed inside the electromagnet housing 11. Two guide nails 15 are fixedly connected to the movable core 14 by threads, and the two mov...

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Abstract

The invention relates to a bidirectional electromagnetic lens driving device and belongs to the technical field of security monitoring. The bidirectional electromagnetic lens driving device aims to to overcome the defect of low zoom speed in the prior art, and comprises a driving module, a transmission module, a lens sleeve and a lens shell, wherein the driving module is moveably connected with the lens sleeve through the transmission module; the lens sleeve is arranged in the lens shell; and the lower end of the driving module is fixedly connected with the lens shell. By adopting the above structure, the lens sleeve can be driven at high speed, an optical system can be zoomed quickly, and the bidirectional electromagnetic lens driving device is simple in structure, high in reliability and low in production cost.

Description

technical field [0001] The invention relates to a two-way electromagnetic lens driving device, in particular to a driving device which drives a lens sleeve to slide along the optical axis direction by using electromagnetic force generated after a coil is energized, and belongs to the technical field of security monitoring. Background technique [0002] At present, the field of security monitoring requires that the pictures taken by security cameras are very clear, and the monitors are installed in traffic flow channels, dead corners of public security, financial institutions or other places that require surveillance photography, so that crimes can be hidden and the development of events can be controlled. Or other related photography, so the monitor is quite practical and important to the public. [0003] At present, fixed-focus surveillance lenses are mostly used in the field of security monitoring on the market. The disadvantage is that they cannot meet the requirements fo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B7/04G03B13/34H02K33/12
Inventor 张新张继真曲贺盟王灵杰张建萍
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI