JPS6233017U - - Google Patents

Description

[Brief explanation of the drawing]

FIG. 1 is a front cross-sectional view of a part of a zoom lens barrel showing an embodiment of the present invention in a macro-starting end position, FIG. 2 is a side cross-sectional view taken along the line - in FIG. 3 is a front sectional view of a part of the zoom lens barrel shown in FIG. 1 in a zoom shooting state, FIG. 4 is a side sectional view taken along the line - in FIG. 3, and FIG. FIG. 6 is a schematic diagram of the optical system illustrating the lens group configuration of the zoom lens barrel.
A seventh plan view of main parts illustrating the engagement relationship between the macro stopper and the fixed frame in the zoom lens barrel.
The figure is a plan view of the macro plate in the zoom lens barrel, FIG. 8 is a developed view of the cam groove formed in the cam ring in the zoom lens barrel, and FIG. 9A
~D is a developed view showing the positional relationship between the cam pin of the compensator frame and the cam groove of the cam ring to explain the transition operation of the zoom lens barrel to the macro range, and FIG. 10 is a diagram of a conventional zoom lens barrel. FIG. 3 is a developed view of a cam groove formed in a cam ring in a cylinder. 11... Focus lens group, 12... Variator lens group (first movable lens group), 13...
Compensator lens group (second movable lens group)
, 14...master lens group (fixed lens group),
21... Fixed frame, 22... Cam ring, 23... Cam groove for variator (first cam groove), 24... Cam groove for compensator (second cam groove), 26...
Cam pin (transmission member), 33...Zoom ring, 35
...Zoom stopper (stopper), 38...Macro knob (operation member), 39...Macro stopper (
operation member), 41...macro board (transmission member).

Claims (1)

[Scope of Utility Model Registration Claim] A focus lens group movably provided within a fixed frame whose relative position with respect to the imaging device body is fixed, a fixed lens group fixed to the fixed frame, and the fixed frame. a zoom ring rotatably provided around the zoom ring, a cam ring interlocked with the zoom ring, and a first cam ring disposed to move in the optical axis direction along a first cam groove of the cam ring. a movable lens group, and a second movable lens group disposed to move in the optical axis direction along a second cam groove of the cam ring, the first lens group and the In a zoom lens barrel configured to perform zoom photography and macro photography by changing the relative position with respect to the second lens group, the continuous rotation range of the zoom ring is limited to within the zoom adjustment range, and the zoom ring is a stopper interposed between the zoom ring and the fixed frame to allow the rotational position of the zoom ring to be moved within the zoom adjustment range or to the macro adjustment position by operation; and a stopper interlocked with the zoom ring. a transmission member provided so that the zoom ring is brought into a state of interlocking with the second movable lens group when the zoom ring comes to the macro adjustment position; and an external operation only when the zoom ring is at the macro adjustment position. A zoom lens barrel having a macro photography function, comprising: an operating member that allows the transmission member to be moved in the optical axis direction;