Patent Application
20100208360
1. Field of the Invention
The present invention relates generally to a zoom structure, and more particularly to a zoom structure which is waterproof and externally modulated.
2. Description of Related Art
Zoom modulator for camera lens is the key device in the surveillance system. Lens is like the crystalline lens of human eyes; without it, human eyes would not be able to see objects. Similarly, without camera lens, the images outputted by the camera would be blurry without clear image. The concepts of camera and video camera are the same. When the muscles on human eyes are unable to extend the crystalline lens to the normal position, which is commonly known as nearsightedness, thus the images in front of the eyes would be blurry. The same problem occurs on camera and lens. When the image is blurry, the zoom of lens could be adjusted to change the distance between the CCD chip and datum surface of lens (similar to the position of crystalline lens of human eyes), the blurry images could become clear. Therefore, adjustable zoom lens is important in the CCTV surveillance system.
To prevent moisture from entering the body of camera lens, the conventional technology set up an externally modulating device. However, this technology has poor tightness, thus, moisture is likely to enter the inside of camera, and causing damage to the camera or inferior image quality.
Therefore, the present invention provides a water proof and externally modulated zoom structure, in order to solve the problems found in the prior art.
The main objective of the present invention is to provide a waterproof and externally modulated zoom structure, which connects to a driving linkage through a revolving axle, and sleeves over the adjusting shaft of the lens, in order to revolve the lens for micro-zooming.
Another objective of the present invention is to provide a waterproof and externally modulated zoom structure, which affixes a driving linkage on a revolving axle, and connects to an adjusting shaft on the lens; when rotating the revolving axle, it can drive the adjusting shaft for micro-zooming.
To achieve the above-mentioned purposes, the present invention provides a waterproof and externally modulated zoom structure, which comprising: a module, on which there is a first adjusting section and a second adjusting section; the first adjusting section and second adjusting section are covered and affixed inside a housing; several adjusting shafts, which are installed on the first adjusting section and second adjusting section, to adjust the zoom of the first adjusting section and second adjusting section; several knobs, which are installed outside of the housing, and connects to a revolving axle that passes through the housing; a driving linkage is affixed on the revolving axle, so that the driving linkage sleeves over the adjusting shaft, when the knob turns, it can indirectly drive the adjusting shaft, and adjust the zoom of the first adjusting section and second adjusting section, in order to make the images more clear; the structure has advantages of simple structure, few components, low production, and feasibility for mass production.
The features and the advantages of the present invention will be more readily understood upon a thoughtful deliberation of the following detailed description of a preferred embodiment of the present invention with reference to the accompanying drawings.
Surveillance system has a certain level of efficacy on reporting crimes and preventing burglary, thus, police bureaus worldwide have actively installed surveillance cameras at many locations, which also has promoted the surveillance system industry. Therefore, the manufacturers need to produce more competitive products with newer technology and lower cost.
Referring to
Outside of the housing 16 has at least one axle hole 161, which can allow the revolving axle 22 to pass through and affix the knob 20; among which, the axle hole 161 has a watertight ring 162, which allows the housing 16 to be waterproof. Referring to
Outside of the housing 36 is a axle hole 46, which allows the revolving axle 42 to pass through and affix the knob 40; the axle hole 46 has a watertight ring 48, which allows the housing 36 to be waterproof.
Although the invention has been explained in relation to its preferred embodiment, it is to be understood that many other possible modifications and variations can be made without departing from the spirit and scope of the invention as hereinafter claimed.
