JPH0221615U

JPH0221615U -

Info

Publication number: JPH0221615U
Application number: JP10039588U
Authority: JP
Priority date: 1988-07-27
Filing date: 1988-07-27
Publication date: 1990-02-14

Description

[Brief explanation of drawings]

第１図はこの考案の一実施例を示す斜視図、第
２図は側面図、第３図は第２図の要部を分解して
示した斜視図、第４図は第３図の左側をさらに分
解して示した斜視図、第５図はスリツプ部材を示
す図で、イは側面図、ロは正面図、ハは背面図で
ある。第６図は従来装置を示す斜視図、第７図は
側面図、第８図は分解斜視図である。図において、１はズームレンズユニツト、２は
ズームリング、５はズーム用モータ、６は減速機
、７は駆動軸、１６はフランジ、１７はスリツプ
部材を示す。なお、図中同一符号は同一または相
当部分を示す。 Figure 1 is a perspective view showing an embodiment of this invention, Figure 2 is a side view, Figure 3 is an exploded perspective view of the main parts of Figure 2, and Figure 4 is the left side of Figure 3. FIG. 5 is a perspective view showing the slip member, in which A is a side view, B is a front view, and C is a rear view. FIG. 6 is a perspective view showing a conventional device, FIG. 7 is a side view, and FIG. 8 is an exploded perspective view. In the figure, 1 is a zoom lens unit, 2 is a zoom ring, 5 is a zoom motor, 6 is a reduction gear, 7 is a drive shaft, 16 is a flange, and 17 is a slip member. Note that the same reference numerals in the figures indicate the same or corresponding parts.

Claims

[Claims for Utility Model Registration] In a drive transmission device for a zoom lens that decelerates the rotation of a zoom motor and transmits it from a drive shaft to a zoom ring to operate a zoom lens, a flange is provided on the drive shaft, and the rotation of the flange is A slip member that transmits rotation to the zoom ring within a constant torque range is rotatably inserted into the drive shaft, and the reverse driving force from the zoom ring is applied to the slip member between the slip member and the flange locked by the reduction unit. A drive transmission device for a zoom lens, in which the drive is not transmitted to the motor due to slipping of a member, and enables manual operation of the zoom lens.