JP2006259130A5

JP2006259130A5 -

Info

Publication number: JP2006259130A5
Application number: JP2005075403A
Authority: JP
Filing date: 2005-03-16
Publication date: 2008-05-08
Anticipated expiration: 2025-03-16

Claims

Focusing lens,
A focus rotating cylinder that rotates during a focusing operation for driving the focusing lens;
A rotary cylinder gear provided on the focus rotary cylinder;
A switching operation member capable of switching between auto focus and manual focus from the outside,
A motor for generating a driving force for driving the focus rotating cylinder during autofocus;
A gear train having a plurality of gears for transmitting the rotational driving force of the motor to the focus rotating cylinder;
The gears constituting the gear train, the output gear always meshing with the rotating cylindrical gear part in both cases of autofocus and manual focus;
Coaxially with the output gear in the rotational direction and provided so as to be rotatable at the same time as the output gear. A movable switching gear member;
With
The switching gear member has a second switching gear portion that meshes with a first switching gear included in the gear train, and at the autofocus position, the first switching gear and the second switching gear. A lens barrel in which the engagement between the first switching gear and the second switching gear is released at the manual focus position.

Oite the lens barrel according to claim 1,
The switching gear member is engaged so that the engagement position can move in the axial direction while continuing the engagement state in the rotation direction with respect to the output gear when moving between the autofocus position and the manual focus position. Having a part,
A lens barrel characterized by

In the lens barrel according to claim 1 or 2,
The output gear is position-regulated so that its axial position does not move in either autofocus or manual focus.
A lens barrel characterized by

In the lens barrel according to any one of claims 1 to 3,
The second switching gear portion is coaxial with the output gear;
A lens barrel characterized by

The lens barrel according to claim 2,
A biasing member that biases the switching gear member toward the autofocus position;
A lens barrel characterized by

In the lens barrel according to any one of claims 1 to 5 ,
The gear train has a first axial position coaxial with the motor;
A second axial position at an axial position of the switching gear member;
A third axial position coaxial with the first switching gear;
Formed from the three axial positions of
A lens barrel characterized by

In the lens barrel according to any one of claims 1 to 5 ,
The gear train has a first axial position coaxial with the motor;
A second axial position at an axial position of the switching gear member;
Are formed from two axial positions,
The first switching gear is disposed at the first shaft position;
A lens barrel characterized by

In the lens barrel according to any one of claims 1 to 7 ,
The motor is a small vibration wave motor that outputs a rotational driving force from its central axis;
A lens barrel characterized by