JPH0193687U

JPH0193687U -

Info

Publication number: JPH0193687U
Application number: JP19008887U
Authority: JP
Priority date: 1987-12-15
Filing date: 1987-12-15
Publication date: 1989-06-20

Description

[Brief explanation of the drawing]

第１図は本考案になる円盤状情報記録媒体再生
装置の概略一部切截斜視図、第２図はリフターア
ームとエレベータの動作を示す図、第３図はカム
レバーの平面図、第４図は切替えレバーの平面図
、第５図はリフターギアの平面図、第６図は駆動
力伝達手段断続機構の平面図、第７図及び第８図
は限界位置検出停止機構の平面図である。４……ターンテーブル、５……円盤状情報記録
媒体（デイスク）、６……センサ搬送部（センサ
キヤリア）、７……センサ、８……ラツク、９…
…搬送部材、１０……ガイドレール、１１……凹
形案内、１３，１８……モータ、１４……ピニオ
ン、１９……螺旋カムギア（カムギア）、１９_１，１９_３……螺旋カム面、１９_２，１９_４……カ
ム状部材、２２，３０，３５……捩りばね、２４
……リフターアーム、２５……エレベータ、２７
……カム、２８……カムレバー、３１……切替レ
バー、３３……リフターギア、３３_３……当接部
材、３４，３７……歯車、ＳＷ_１，ＳＷ_２，ＳＷ
_３……スイツチ。 Fig. 1 is a schematic partially cutaway perspective view of the disc-shaped information recording medium reproducing device according to the present invention, Fig. 2 is a diagram showing the operation of the lifter arm and elevator, Fig. 3 is a plan view of the cam lever, and Fig. 4 FIG. 5 is a plan view of the switching lever, FIG. 5 is a plan view of the lifter gear, FIG. 6 is a plan view of the driving force transmission means disconnection mechanism, and FIGS. 7 and 8 are plan views of the limit position detection and stop mechanism. 4...Turntable, 5...Disc-shaped information recording medium (disc), 6...Sensor transport unit (sensor carrier), 7...Sensor, 8...Rack, 9...
... Conveyance member, 10 ... Guide rail, 11 ... Concave guide, 13, 18 ... Motor, 14 ... Pinion, 19 ... Spiral cam gear (cam gear), 19 ₁ , 19 ₃ ... spiral cam surface, 19 ₂ , 19 ₄ ... cam-shaped member, 22, 30, 35 ... torsion spring, 24
... Lifter arm, 25 ... Elevator, 27
... cam, 28 ... cam lever, 31 ... switching lever, 33 ... lifter gear, 33 ₃ ... contact member, 34, 37 ... gear, SW ₁ , SW ₂ , SW
₃ ...Switch.

Claims

[Scope of Claim for Utility Model Registration] (1) It has a disc-shaped information recording medium elevating mechanism that raises and lowers the disc-shaped information recording medium above the turntable, and also has a sensor transport section equipped with a sensor that moves the disc-shaped information recording medium In a disc-shaped information recording medium playback device that detects an information signal recorded on the signal surface of the disc-shaped information recording medium by sweeping it parallel to the signal surface of the disc-shaped information recording medium, one end of the disc-shaped information recording medium is fitted to a fulcrum fixed to a chassis. a guide member configured to be swingable in a direction perpendicular to the signal surface of the disc-shaped information recording medium together with the sensor conveyance unit; and a part of the guide member near the free end abuts on a spiral cam surface. a sensor transporting part elevating mechanism including a helical cam gear that is rotationally driven by a motor to swing the guide member and the sensor transporting part; a driving force transmitting means for transmitting the driving force of the motor for driving the mechanism to the disc-shaped information recording medium elevating mechanism; and the sensor transport section sweeps in parallel to the signal surface of the disc-shaped information recording medium. During the period, a driving force transmission means intermittent mechanism is provided in which the driving force transmission means is disconnected, so that the motor can drive both the disk-shaped information recording medium lifting mechanism and the sensor transport unit lifting mechanism. a first pushing member that comes into contact with a first lever of a control switch circuit of the motor when the disc-shaped information recording medium lifting mechanism reaches the top of a predetermined movable range; When the sensor conveyance part lifting/lowering mechanism reaches the top and bottom of a predetermined movable range, a limit position detection and stop mechanism consisting of a second pushing member that comes into contact with the second lever of the control switch circuit is activated. A disk-shaped information recording medium reproducing device provided. (2) The limit position detection and stop mechanism uses a cam-shaped member provided on the outer periphery of the helical cam gear as a first pushing member, and a protrusion member provided on the movable part of the driving force transmission means as a second pushing member. A disc-shaped information recording medium reproducing device according to claim 1, which is a member. (3) The limit position detection and stop mechanism serves as both the first pushing member and the second pushing member by a cam-shaped member provided on the outer periphery of the helical cam gear, and
the first control switch circuit of the motor;
The disc-shaped information recording medium reproducing device according to claim 1, wherein the lever and the second lever are used together.