JPH0326108U

JPH0326108U -

Info

Publication number: JPH0326108U
Application number: JP8755689U
Authority: JP
Priority date: 1989-07-26
Filing date: 1989-07-26
Publication date: 1991-03-18
Anticipated expiration: 2004-07-26
Also published as: JP2504984Y2

Description

[Brief explanation of drawings]

第１図〜第３図は本考案の一実施例を示し、第
１図は本考案に係るレンズ鏡筒の縦断面図、第２
図はクラツチ機構の詳細を示す斜視図、第３図ａ
〜ｄは切換リングと切換板との関係を示す展開図
であり、ａはＡモードのときを、ｂはＡモードか
らＭモードに切換わつたときを、ｃはＭモードの
ときを、ｄはＭモードからＡモードに切換わつた
ときをそれぞれ示す。第３図ｅはａのｅ−ｅ線断
面図である。１……固定筒、１ｄ……突起部、４……歯車、
４ｂ……突起部、５……摺動リング、６……カム
筒、７……直進筒、８……モード設定リング、９
……切換リング、１０……切換板、１１……ねじ
りばね、１００……クラツチ機構。 1 to 3 show one embodiment of the present invention, and FIG. 1 is a vertical sectional view of a lens barrel according to the present invention, and FIG.
The figure is a perspective view showing details of the clutch mechanism, Figure 3a.
- d are developed views showing the relationship between the switching ring and the switching plate, where a shows the state when in A mode, b shows when switching from A mode to M mode, c shows when in M mode, and d shows when in M mode. Each figure shows when the M mode is switched to the A mode. FIG. 3e is a sectional view taken along the line ee--e of a. 1...Fixed tube, 1d...Protrusion, 4...Gear,
4b... Protrusion, 5... Sliding ring, 6... Cam cylinder, 7... Straight cylinder, 8... Mode setting ring, 9
...Switching ring, 10...Switching plate, 11...Torsion spring, 100...Clutch mechanism.

Claims

[Claims for Utility Model Registration] A lens barrel capable of selecting either an automatic focusing mode in which a focusing optical system is driven by a motor, or a manual focusing mode in which the focusing optical system is driven manually. a lens drive mechanism for driving the focusing optical system by the rotation of a motor; a transmission position for transmitting the rotation of the motor to the lens drive mechanism; and a transmission position for transmitting the rotation of the motor to the lens drive mechanism. a clutch mechanism that can be switched to a blocking position for blocking; and a mode setting operating member operable for an automatic focusing position for selecting the automatic focusing mode and a manual focusing position for selecting the manual focusing mode. and a clutch mechanism extending in a plane substantially parallel to the optical axis of the focusing optical system, and directing the clutch mechanism toward the transmission position in conjunction with operation of the mode setting operation member to the automatic focus adjustment position. moving in a first direction to drive the clutch mechanism, and moving in a second direction to drive the clutch mechanism toward the blocking position in conjunction with operation of the mode setting operating member to the manual focus adjustment position. a drive plate; a biasing member provided on either one of the mode setting operation member and the drive plate extending in a plane substantially parallel to the drive plate; an engaging portion formed on the other end and capable of engaging with the biasing member; when the drive plate moves in the first direction but the clutch mechanism does not reach the transmission position, the biasing member engages with the biasing member; continues to bias the drive plate against the clutch mechanism in the first direction via the engagement portion, and the drive plate moves in the second direction, but the clutch mechanism remains in the blocking position. If not, the biasing member continues to bias the drive plate against the clutch mechanism in the second direction via the engaging portion, and the clutch mechanism moves to either the transmission position or the blocking position. A lens barrel characterized in that when one end is reached, the biasing member releases biasing of the drive plate against the clutch mechanism via the engaging portion.