Lens device and digital camera using same

Abstract

Provided is a lens device in which an optical zooming mechanism is also mounted without damaging the advantage of thinning brought about by a deflecting optical system lens array, and to provide a digital camera using the lens device. In the lens device, a 2nd optical axis O2 is deflected nearly at a right angle downward the lens device by a photographic lens prism which is disposed in front of a motor unit for zooming 35 arranged at the rear of the upper end of the lens device. A shaft cam for zooming 25 is arranged in the vicinity of a moving lens frame for zooming and along the moving direction of the moving lens frame for zooming in parallel with the 2nd optical axis O2. The cam followers 61-1 and 61-2 of the moving lens frames for zooming 17 and 18 are engaged with 1st and 2nd cam grooves 25-1 and 25-2 which are provided on the outer periphery of the cam 25. The moving lens frames 17 and 18, that means, moving lens parts for zooming 9 and 11 are moved to separate and come in contact along the direction of the 2nd optical axis O2 in accordance with the rotation of the cam 25, and perform the zooming of reduction / enlargement for the image of a luminous flux advancing in the direction of the optical axis O2.

Description

technical field [0001] The present invention relates to a thin lens device and a digital camera using the same. Background technique [0002] Patent Document 1: Japanese Unexamined Patent Publication No. 2003-66309 (Abstract, image 3 , Figure 5 ) [0003] Patent Document 2: JP 2002-290806 ([Claim 6], paragraph [0038], paragraph [0041], figure 2 , image 3 ) [0004] Conventionally, in the digital camera market, as the demand for miniaturization and thinning of digital cameras increases, it is necessary to incorporate a thin lens device in the digital camera. [0005] As one method of reducing the thickness of a lens device, a lens device using a bending optical system has been proposed. In order to achieve such thinning, the present applicant proposed a lens device in which units forming the lens device are arranged horizontally. (For example, refer to Patent Document 1.) [0006] In addition, in the recent digital camera market, electronic zooming has become unsati...

AI Technical Summary

Problems solved by technology

However, if the zoom drive system is assembled inside the device in this way, it may lead to loss of thinness as the advantage of the bending optical system lens device, so it is necessary to maintain the thinness of the device anyway.

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