External focusing device of self-locking camera
A camera and self-locking technology, applied in the field of cameras, can solve the problems such as the relative distance of the lenses in the lens cannot reach the best imaging position, the quality of the imaging image is not high, and the accurate positioning cannot be achieved, so as to improve the imaging quality, precise positioning and adjustment of the camera. Focus convenient effect
Inactive Publication Date: 2014-04-09
吉安东南光电股份有限公司
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Problems solved by technology
When the external focusing device of this structure adjusts the axial relative distance of the lens on the lens, the gear plates 11', 12' of the transmission mechanism 1' and the gear shafts 2', 3' are meshed and connected to each other, so that the gear plates are adjusted and rotated. There is a rotation gap between the gear shaft and the gear shaft, which makes it impossible to accurately locate it, resulting in a large position deviation, making the relative distance of the lens inside the lens unable to reach the optimal imaging position, making the final imaging quality not high. Existing Although the technology also has some other external focusing structures, the structure is complex and the cost is high
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[0010] The present invention will be further described in conjunction with the accompanying drawings and specific embodiments.
[0011] refer to figure 2 , an external focusing device for a self-locking camera disclosed in an embodiment of the present invention includes a transmission mechanism 1 for adjusting the axial relative distance of lenses on the lens, a worm 2 meshing with the worm wheels 11 and 12 of the transmission mechanism 1, 3 and an adjustment mechanism 4 connected to one end of the worms 2 and 3 and used to control the rotation of the worms 2 and 3. The adjustment mechanism 4 includes two rotation slots 41 and 42 respectively connected to one end of the worms 2 and 3. The rotation Grooves 41, 42 are cylinders provided with inner hexagonal grooves.
[0012] In the present invention, the rotation of the worm gear and the worm is matched without clearance, and the adjustment mechanism is used to control the rotation of the worm, and then the worm drives the wor...
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The invention relates to cameras, and provides an external focusing device of a self-locking camera. The external focusing device is simple in structure, low in manufacturing cost, capable of achieving precision positioning of external focusing and improving the shooting imaging quality. The external focusing device comprises a transparent cover shell, a transparent cover plate, an infrared lamp plate and a camera lens, and further comprises a transmission mechanism, a worm and an adjusting mechanism. The transmission mechanism is used for adjusting the axial relative distance of a lens body on the camera lens, the worm is meshed with a worm gear disk of the transmission mechanism, and the adjusting mechanism is connected with one end of the worm and is used for controlling the worm to rotate.
Description
technical field [0001] The invention relates to a camera, in particular to an external focusing device for a self-locking camera. Background technique [0002] When a traditional camera takes a picture, the relative distance between the subject and the camera, that is, the object distance, changes. In order to obtain clear images of objects with different object distances on the image board through the lens, a focusing process must be performed. The current focusing process usually adopts the following two methods: 1. Change the focusing method of the image distance, keep the focal length of the lens unchanged, and change the distance between the lens and the image plate by adjusting the axial position of the entire group of lenses , that is, changing the image distance to obtain a clear image. This focusing method needs to move the whole group of lenses, and because the whole group of lenses has many lenses and is large in size, the focusing mechanism is complicated. Se...
Claims
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IPC IPC(8): G03B13/32G02B7/04
CPCG02B7/023G02B7/04G03B13/32
Inventor 黄中元
Owner 吉安东南光电股份有限公司