JP2016114799A5

JP2016114799A5 -

Info

Publication number: JP2016114799A5
Application number: JP2014253673A
Authority: JP
Filing date: 2014-12-16
Publication date: 2017-12-21

Description

請求項１に記載のズームレンズ鏡胴は、複数のレンズ群のいずれか１群以上を光軸方向に移動させるズームレンズ鏡胴であって、
第１のカム溝と第２のカム溝を形成した、回転可能な筒部材と、
レンズ群を保持し、前記筒部材に対して光軸方向に移動可能なレンズ枠と、
前記レンズ枠を光軸方向に案内するガイド部材と、を有し、
前記レンズ枠には、前記第１のカム溝に当接係合し相対的に摺動可能となっている第１のカムピンと、前記第２のカム溝に沿って移動する第２のカムピンとが設けられており、
前記筒部材の回転に応じて、前記第１のカムピンが前記第１のカム溝に対して摺動することにより、前記レンズ枠が光軸方向に移動されるようになっており、
前記ズームレンズ鏡胴に衝撃力が付与されたとき、前記第２のピンが前記第２のカム溝に接して力を受けるようになっており、
前記ズームレンズ鏡胴を光軸方向に見たときに、前記第２のカムピンは、前記第１のカムピンに対して、光軸を挟んで反対側に配置されており、
前記ガイド部材は、前記レンズ枠に相対移動可能に係合し、且つ光軸方向に沿って延在するメインガイドシャフト及びサブガイドシャフトであることを特徴とする。
The zoom lens barrel according to claim 1 is a zoom lens barrel that moves any one or more of a plurality of lens groups in the optical axis direction.
A rotatable cylindrical member formed with a first cam groove and a second cam groove;
A lens frame that holds the lens group and is movable in the optical axis direction with respect to the cylindrical member;
A guide member for guiding the lens frame in the optical axis direction,
The lens frame includes a first cam pin that comes into contact with and engages with the first cam groove, and a second cam pin that moves along the second cam groove. Is provided,
The lens frame is moved in the optical axis direction by sliding the first cam pin with respect to the first cam groove according to the rotation of the cylindrical member,
When an impact force is applied to the zoom lens barrel, the second pin comes into contact with the second cam groove and receives a force;
When the zoom lens barrel is viewed in the optical axis direction, the second cam pin is disposed on the opposite side of the first cam pin across the optical axis,
The guide member is a main guide shaft and a sub guide shaft that engage with the lens frame so as to be relatively movable and extend along the optical axis direction.

Claims

A zoom lens barrel that moves one or more of a plurality of lens groups in the optical axis direction,
A rotatable cylindrical member formed with a first cam groove and a second cam groove;
A lens frame that holds the lens group and is movable in the optical axis direction with respect to the cylindrical member;
A guide member for guiding the lens frame in the optical axis direction,
The lens frame includes a first cam pin that comes into contact with and engages with the first cam groove, and a second cam pin that moves along the second cam groove. Is provided,
The lens frame is moved in the optical axis direction by sliding the first cam pin with respect to the first cam groove according to the rotation of the cylindrical member,
When an impact force is applied to the zoom lens barrel, the second pin comes into contact with the second cam groove and receives a force;
When the zoom lens barrel is viewed in the optical axis direction, the second cam pin is disposed on the opposite side of the first cam pin across the optical axis,
The zoom lens barrel according to claim 1, wherein the guide member includes a main guide shaft and a sub guide shaft that are engaged with the lens frame so as to be relatively movable and extend along an optical axis direction.

An imaging apparatus comprising the zoom lens barrel according to claim 1.