JP2003227992A5

JP2003227992A5 -

Info

Publication number: JP2003227992A5
Application number: JP2002176602A
Authority: JP
Filing date: 2002-06-18
Publication date: 2005-09-29

Claims

In a lens barrel having a focus lens that holds a photographic lens composed of a plurality of lens groups and adjusts the focus by configuring a part of the photographic lens and moving in the optical axis direction,
A focus motor that is disposed outside the lens barrel and drives the focus lens;
A feed screw disposed parallel to the optical axis and rotated by the focus motor;
A nut threadedly engaged with the feed screw;
A focus lens barrel that holds the focus lens and engages with the nut and moves straight in the optical axis direction;
A lens barrel characterized by comprising:

2. The lens barrel according to claim 1, wherein a guide shaft is fixed to a member in the lens barrel in parallel with an optical axis, and the focus lens frame is fitted to the guide shaft.

The lens barrel according to claim 1, further comprising an urging member that presses the focus lens barrel against the nut.

The lens barrel according to claim 1, wherein the focus lens is disposed closest to the imaging plane.

A camera comprising the lens barrel according to claim 1.

In a method of manufacturing a lens barrel that includes a focus lens that holds a photographing lens composed of a plurality of lens groups and adjusts a focus by moving in the optical axis direction by forming a part of the photographing lens.
A focus lens barrel that holds the focus lens;
A guide shaft fixed to a member in the lens barrel in parallel with the optical axis;
A focus motor that drives the focus lens, a feed screw that is rotated by the focus motor, a nut that is screwed with the feed screw, and a focus lens drive unit that has a feed screw holding member that holds the feed screw, and
Fitting the focus lens barrel to the guide shaft;
Attaching the focus lens driving unit to the lens barrel from a direction substantially orthogonal to the optical axis, and engaging the nut with the focus lens frame;
A method for manufacturing a lens barrel, comprising:

Next to the step of fitting the focus lens frame to the guide shaft, the method includes a step of attaching a biasing member that biases the focus lens frame in the optical axis direction and press-contacts the nut. A method for manufacturing the lens barrel according to claim 6.