JPS62184512U - - Google Patents

Description

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は本考案の合焦点装置の断面図、第２図
は第１図の要部の拡大断面図、第３図はリードカ
ムの斜視図、第４図はリードカムの取付状態を示
す平面図、第５図は第４図の―線断面図、第
６図は鏡胴のリード溝の始端部の平面図、第７図
はリードカムの他の実施例の断面図、第８図は従
来例の断面図である。 １……カメラの合焦点装置、２……レンズ、３
……鏡胴、４……鏡胴支持部材、５……リード溝
、５ａ，５ｂ……リード溝の両側面、６……リー
ドカム、７……回転運動―スラスト運動変換機構
、１０……スプリング。 Fig. 1 is a sectional view of the focusing device of the present invention, Fig. 2 is an enlarged sectional view of the main part of Fig. 1, Fig. 3 is a perspective view of the lead cam, and Fig. 4 is a plan view showing the installation state of the lead cam. , FIG. 5 is a sectional view taken along the line -- in FIG. 4, FIG. 6 is a plan view of the starting end of the lead groove in the lens barrel, FIG. 7 is a sectional view of another embodiment of the lead cam, and FIG. 8 is a conventional example. FIG. 1...Camera focusing device, 2...Lens, 3
... Lens barrel, 4... Lens barrel support member, 5... Lead groove, 5a, 5b... Both sides of lead groove, 6... Lead cam, 7... Rotary motion-thrust motion conversion mechanism, 10... Spring .

Claims (1)

【実用新案登録請求の範囲】 レンズを取付けた鏡胴を鏡胴支持部材に嵌合し
、これら鏡胴と鏡胴支持部材を、鏡胴又は鏡胴支
持部材のいずれか一方に設けたリード溝と、他方
に設けたリードカムとからなる回転運動―スラス
ト運動変換機構を介して結合し、前記鏡胴と鏡胴
支持部材とを相対回転させることにより、鏡胴を
スラスト方向に移動させるカメラの合焦点装置に
おいて、 前記鏡胴又は鏡胴支持部材のいずれか一方には
リード溝を設け、他方にはリード溝の長さ方向に
所定の間隔をもたせた状態で、該リード溝内に嵌
合する対状のリードカムを設け、これらリードカ
ムのうちの一方のリードカムをスプリングによつ
てリード溝の一側面に当接させ、他方のリードカ
ムをスプリングによつてリード溝の他側面に当接
させたことを特徴とするカメラの合焦点装置。[Claims for Utility Model Registration] A lens barrel with a lens attached is fitted into a lens barrel support member, and these lens barrels and the lens barrel support member are connected to a lead groove provided in either the lens barrel or the lens barrel support member. and a lead cam provided on the other side through a rotary movement/thrust movement conversion mechanism, and the lens barrel and the lens barrel support member are rotated relative to each other, thereby moving the lens barrel in the thrust direction. In the focusing device, either the lens barrel or the lens barrel support member is provided with a lead groove, and the other is fitted into the lead groove with a predetermined interval in the length direction of the lead groove. A pair of lead cams are provided, one of the lead cams is brought into contact with one side of the lead groove by a spring, and the other lead cam is brought into contact with the other side of the lead groove by a spring. Features camera focusing device.