JP2014211532A5

JP2014211532A5 -

Info

Publication number: JP2014211532A5
Application number: JP2013087707A
Authority: JP
Filing date: 2013-04-18
Publication date: 2016-03-24
Anticipated expiration: 2033-04-18

Description

第３に、上記したレンズ鏡筒においては、前記沈胴状態において前記バリア羽根が閉塞されると共に前記第１レンズ群が前記バリア羽根より撮像面側に位置され、前記撮影状態において前記バリア羽根が開放されて光入射孔が形成されると共に前記第１レンズ群の少なくとも一部が前記光入射孔に挿入されることが望ましい。 Thirdly, in the lens barrel described above, the barrier blades are closed in the retracted state and the first lens group is positioned closer to the imaging surface than the barrier blades, and the barrier blades are opened in the photographing state. it is desirable that is to be inserted into at least a part of the light incident hole of the first lens group with the optical entrance aperture is formed.

（３）
前記沈胴状態において前記バリア羽根が閉塞されると共に前記第１レンズ群が前記バリア羽根より撮像面側に位置され、
前記撮影状態において前記バリア羽根が開放されて光入射孔が形成されると共に前記第１レンズ群の少なくとも一部が前記光入射孔に挿入される
前記（１）又は前記（２）に記載のレンズ鏡筒。 (3)
In the retracted state, the barrier blade is closed and the first lens group is positioned closer to the imaging surface than the barrier blade,
Lens according to (1) or (2) of the said in the photographing state barrier blades are opened at least a portion of the first lens group with light incident hole is formed is inserted into the optical entrance aperture The lens barrel.

Claims

It is possible to expand and contract between the retracted state in which the optical path length is minimized and the shooting state in which the optical path length is longer than the retracted state,
A barrier support frame that is movable in the optical axis direction of the imaging optical system;
A barrier blade that is moved relative to the barrier support frame in a direction perpendicular to the optical axis direction to be opened and closed;
A first group holding frame for holding a first lens group constituting a part of the photographing optical system;
A cam ring rotated around the optical axis;
A linear ring that supports the barrier support frame so as not to rotate in the direction around the optical axis and to be movable in the optical axis direction;
The cam ring and the first group holding frame are provided with a cam follower on one side and a cam groove on which the cam follower is slidably engaged.
The first group holding frame is moved in the optical axis direction or rotated in the direction around the optical axis by the rotation of the cam ring in the direction around the optical axis according to the engagement position of the cam follower with respect to the cam groove,
The barrier support frame and the first group holding frame are provided with a cam pin on one side and a cam slide groove is formed on the other side so that the cam pin is slidably engaged.
The barrier support frame is moved in the optical axis direction by the movement of the first group holding frame in the optical axis direction or the rotation in the direction around the optical axis according to the engagement position of the cam pin with respect to the cam sliding groove,
In the photographing state, the first group holding frame is supported by the rectilinear ring so as not to rotate around the optical axis and to be movable in the optical axis direction,
The first group holding frame is supported on the straight ring so as to be rotatable around the optical axis in a partial section between the retracted state and the photographing state,
In the process from the retracted state to the photographing state, the first group holding frame is rotated in the direction around the optical axis with respect to the rectilinear ring by the rotation of the cam ring in the partial section. A lens barrel that is relatively moved so that the frame and the barrier support frame approach each other in the optical axis direction.

A barrier drive ring that rotates around the optical axis to open and close the barrier blades is provided,
The lens according to claim 1, wherein the first group holding frame is rotated in the direction around the optical axis with respect to the barrier support frame, and the barrier driving ring is connected to the first group holding frame and rotated in the direction around the optical axis. The lens barrel.

In the retracted state, the barrier blade is closed and the first lens group is positioned closer to the imaging surface than the barrier blade,
The barrier blades is open at least a portion of the first lens group with light incident hole is formed is inserted into the light entrance hole in the photographing state
The lens barrel according to claim 1 or 2 .

A cam projection is provided on the first group holding frame,
A cam engagement groove is formed in the straight ring so that the cam protrusion is slidably engaged,
In the cam engagement groove, a first rotation restricting portion extending in the optical axis direction, a rotation allowing portion extending in the direction around the optical axis, and a second rotation restricting portion extending in the optical axis direction are sequentially formed in a crank shape. ,
The cam protrusion is slid on the rotation allowing portion in the partial section.
The lens barrel according to any one of claims 1 to 3 .

A lens barrel in which a photographing optical system is disposed, and an image sensor that converts an optical image captured via the photographing optical system into an electrical signal;
The lens barrel is
It is possible to expand and contract between the retracted state in which the optical path length is minimized and the shooting state in which the optical path length is longer than the retracted state,
A barrier support frame that is movable in the optical axis direction of the imaging optical system;
A barrier blade that is moved relative to the barrier support frame in a direction perpendicular to the optical axis direction to be opened and closed;
A first group holding frame for holding a first lens group constituting a part of the photographing optical system;
A cam ring rotated around the optical axis;
A linear ring that supports the barrier support frame so as not to rotate in the direction around the optical axis and to be movable in the optical axis direction;
The cam ring and the first group holding frame are provided with a cam follower on one side and a cam groove on which the cam follower is slidably engaged.
The first group holding frame is moved in the optical axis direction or rotated in the direction around the optical axis by the rotation of the cam ring in the direction around the optical axis according to the engagement position of the cam follower with respect to the cam groove,
The barrier support frame and the first group holding frame are provided with a cam pin on one side and a cam slide groove is formed on the other side so that the cam pin is slidably engaged.
The barrier support frame is moved in the optical axis direction by the movement of the first group holding frame in the optical axis direction or the rotation in the direction around the optical axis according to the engagement position of the cam pin with respect to the cam sliding groove,
In the photographing state, the first group holding frame is supported by the rectilinear ring so as not to rotate around the optical axis and to be movable in the optical axis direction,
The first group holding frame is supported on the straight ring so as to be rotatable around the optical axis in a partial section between the retracted state and the photographing state,
In the process from the retracted state to the photographing state, the first group holding frame is rotated in the direction around the optical axis with respect to the rectilinear ring by the rotation of the cam ring in the partial section. An imaging apparatus that is relatively moved so that the frame and the barrier support frame approach each other in the optical axis direction.