JPS6090409U

JPS6090409U - zoom lens

Info

Publication number: JPS6090409U
Application number: JP18404683U
Authority: JP
Inventors: 小曽根　真三; 菱川　健二
Original assignee: 株式会社毎日放送
Priority date: 1983-11-28
Filing date: 1983-11-28
Publication date: 1985-06-20
Also published as: JPH0134164Y2

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

第１図は本考案に係るズームレンズの実施例を示す一部
断面側面図である。１・・・鏡胴、２・・・ズームリング、３・・・円弧状
歯車、４・・・フォーカスリング（歯付リング）、１０
・・・駆動機構収納ケース、１０ａ・・・突出部、１１
・・・回転軸、１２・・・第１歯車、１３・・・回転ス
リーブ、１４・・・第２歯車、１５・・・アイドリング
歯車、１６・・・軸、１７・・・第２傘歯車、１８・・
・第１傘歯車、１９・・・回転ノブ、２０・・・軸、２
１・・・第３傘歯車、２２・・・第４傘歯車、２３・・
・差動歯車機構収納ケース、２４ａ、２４ｂ・・・差動
傘歯車、２５ａ、２５ｂ・・・軸部、２６・・・筒部。FIG. 1 is a partially sectional side view showing an embodiment of a zoom lens according to the present invention. DESCRIPTION OF SYMBOLS 1... Lens barrel, 2... Zoom ring, 3... Arc-shaped gear, 4... Focus ring (toothed ring), 10
...Drive mechanism storage case, 10a...Protrusion part, 11
... Rotating shaft, 12... First gear, 13... Rotating sleeve, 14... Second gear, 15... Idling gear, 16... Shaft, 17... Second bevel gear , 18...
・First bevel gear, 19... Rotation knob, 20... Shaft, 2
1...Third bevel gear, 22...Fourth bevel gear, 23...
- Differential gear mechanism storage case, 24a, 24b... Differential bevel gear, 25a, 25b... Shaft portion, 26... Cylindrical portion.

Claims

[Scope of utility model registration request]

(1) A zoom lens that is equipped with a zoom ring and a focus ring at a certain distance from each other around the lens barrel, and gear teeth are formed on the outer periphery of either the zoom ring or the focus ring, A drive mechanism storage case is fixed to one of the other, and a rotary knob is provided in the case, which also serves as zoom operation and focus operation, and is rotatable relative to the case, and a rotary knob is installed in the case and on the lens barrel. When the toothed ring rotates, the first gear meshed with the one toothed ring is rotated, and the one rotation knob that rotates the toothed ring is integrally mirrored with the case and the other ring. A zoom lens comprising a drive mechanism configured to cause the first gear meshing with the toothed ring to rotate idly when the toothed ring is rotated relative to the barrel.

(2) The drive mechanism includes an arc-shaped gear fixed to the outer periphery of the lens barrel, and a first gear mounted on the case parallel to the center axis of the lens barrel and meshing with the toothed ring at one end. a rotating shaft having a first bevel gear on the other end; a second gear loosely fitted on the outer periphery of the rotating shaft and meshing with the arc-shaped gear via the idling gear on the outer periphery of one end;
a rotary sleeve having a second bevel gear paired with the first bevel gear on the outer periphery of the other end; , and a rotation means having a pair of differential gears cooperating with the second bevel gear.

(3) The zoom lens according to item 1 or 2, wherein the toothed ring is a focus ring.

(4) The zoom lens according to item 1 or 2, wherein the toothed ring is a zoom ring.