JPH0253724U

JPH0253724U -

Info

Publication number: JPH0253724U
Application number: JP13393588U
Authority: JP
Priority date: 1988-10-13
Filing date: 1988-10-13
Publication date: 1990-04-18

Description

[Brief explanation of drawings]

第１図は、従来の電動ギヤツチの取付け図例の
説明図である。第２図は、本考案にかかわる電動
ギヤツチの取付け図例の説明図である。第３図は
、本考案の断面説明図である。第４図は、第３図
のＡ―Ｂ断面に於ける断面説明図である。１……ベツド、２……ボトム、２ａ……ボトム
背上げ部あるいは脚上げ部、３……モータ、４…
…駆動軸、５……ナツト、６……従動軸、７……
リンク機構、８……手元スイツチ、９……制御装
置、１０……特殊ナツト、１１……回動ねじ、１
２……ギヤボツクス、１３……ウオームギヤ、１
４……出力軸。 FIG. 1 is an explanatory diagram of an example of an installation diagram of a conventional electric gear. FIG. 2 is an explanatory diagram of an example of an installation diagram of an electric gear according to the present invention. FIG. 3 is a cross-sectional explanatory diagram of the present invention. FIG. 4 is an explanatory cross-sectional view taken along the line AB in FIG. 3. 1...Bed, 2...Bottom, 2a...Bottom back raising part or leg raising part, 3...Motor, 4...
... Drive shaft, 5 ... Nut, 6 ... Driven shaft, 7 ...
Link mechanism, 8... Hand switch, 9... Control device, 10... Special nut, 11... Rotating screw, 1
2... Gear box, 13... Worm gear, 1
4...Output shaft.

Claims

[Scope of utility model registration request]

An output shaft whose drive source is a motor that can start and stop rotation in forward and reverse directions at will, and a drive shaft are connected by a worm gear, and a rotary screw fixed to the drive shaft and capable of rotating is connected to the drive shaft. A joint in which there is a nut that can reciprocate in the axial direction in response to forward and reverse rotation, and is connected through a driven shaft attached to the nut by a link mechanism of the nut formed with a rotating screw. Attach the shaft end of the bottom to a bed that can tilt and return the back and leg raising parts of the bottom, and at the end of either the tilting or returning process of the bottom's movement, the position of the driven shaft, the bottom and its Without a device such as a limit switch that detects the tilt angle of the part or the amount of rotation of the motor or drive shaft and automatically stops the motor, after reaching the end of the tilting process or returning process,
In order to allow the rotating screw shaft of the motor to idle regardless of the reciprocating motion of the driven shaft, a fixed position idle mechanism is added to the power transmission device between the rotating screw shaft and the driven shaft, and the output shaft and Because the drive shaft is transmitted by a worm gear, there is no need to install a motor as a drive source on the extension of the axis of the drive shaft, and it is possible to install it on the bed on the extension of the axis of the drive shaft, making it easy to install. electric gear.