JPS6298027U

JPS6298027U -

Info

Publication number: JPS6298027U
Application number: JP18973585U
Authority: JP
Priority date: 1985-12-10
Filing date: 1985-12-10
Publication date: 1987-06-22

Description

[Brief explanation of the drawing]

第１図はこの考案になるテープレコーダのモー
ド切換装置の実施例を示す停止時における状態の
平面図、第２図はその一部を省略して示す側面図
、第３図はその早送り時における状態の平面図、
第４図はその巻戻し時における状態の平面図、第
５図はその再生時における状態の平面図、第６図
は特にモード検出用円形カム板とこれと協働する
検出スイツチの配置構造を示した一部切欠斜視図
、第７図はその停止時における平面図、第８図ａ
，ｂはテープリール駆動用カム板を示す平面図、
第９図はそのテープリール駆動用カム板と協働す
る一対の回動制御部材の正面図、第１０図は検出
用円形カム板と検出スイツチの各モードにおける
オン、オフの組合わせ状態を表わした説明図であ
る。１……供給リール台、１ａ……歯車、１ｂ……
リール軸、１ｃ……歯車、２……巻取リール台、
２ａ……歯車、２ｂ……リール軸、３……モータ
、３ａ……回転軸、４……第１の歯車、５……ア
ーム、５ａ……一片、５ａ′……他片、５ｂ，５
ｂ′……突片、６……第２の歯車、６ａ……大径
歯車、６ｂ……小径歯車、７……第１の中間歯車
、７ａ……大径歯車、７ｂ……小径歯車、７′…
…第２の中間歯車、７ａ′……大径歯車、７ｂ′
……小径歯車、８……テープリール駆動用カム板
、８ａ……歯車、８ｂ，８ｂ′……カム、８ｃ…
…支軸、９，９′……回動制御部材、９ａ，９ａ
′……回動制御部材の先端部、９ｂ，９ｂ′……
長孔、９ｃ，９ｃ′……凹部、９ｄ，９ｄ′……
基端部、１０……ヘツドベース、１０ａ……ピン
、１０ｂ……係止部、１１……磁気ヘツド、１２
……ピンチローラ、１２ａ……支持アーム、１２
ｂ……突子、１２ｃ……支軸、１３……キヤプス
タン、１４……ヘツドベース駆動用カム板、１４
ａ……突出頂部、１５……シヤーシ、１５ａ……
長孔、１６……モード検出用円形カム板、１７…
…検出スイツチ、１７ａ，１７ａ′……突子、１
７ｂ，１７ｂ′……弾性片、１７ｃ，１７ｃ′…
…スイツチ、Ａ〜Ｈ……溝孔。 Fig. 1 is a plan view showing an embodiment of the mode switching device for a tape recorder according to the present invention when it is stopped, Fig. 2 is a side view with some parts omitted, and Fig. 3 is a diagram showing the mode switching device in fast forward mode. state plan,
Fig. 4 is a plan view of the state during rewinding, Fig. 5 is a plan view of the state during playback, and Fig. 6 particularly shows the arrangement structure of the circular cam plate for mode detection and the detection switch that cooperates with it. The partially cutaway perspective view shown in FIG. 7 is a plan view at the time of stop, and FIG. 8 a
, b is a plan view showing a tape reel driving cam plate;
Fig. 9 is a front view of a pair of rotation control members that cooperate with the tape reel driving cam plate, and Fig. 10 shows the combination of the detection circular cam plate and the detection switch on and off in each mode. FIG. 1... Supply reel stand, 1a... Gear, 1b...
Reel shaft, 1c...gear, 2...take-up reel stand,
2a...gear, 2b...reel shaft, 3...motor, 3a...rotating shaft, 4...first gear, 5...arm, 5a...one piece, 5a'...other piece, 5b, 5
b'... Projection piece, 6... Second gear, 6a... Large diameter gear, 6b... Small diameter gear, 7... First intermediate gear, 7a... Large diameter gear, 7b... Small diameter gear, 7'...
...Second intermediate gear, 7a'...Large diameter gear, 7b'
...Small diameter gear, 8...Cam plate for tape reel drive, 8a...Gear, 8b, 8b'...Cam, 8c...
...Support shaft, 9, 9'...Rotation control member, 9a, 9a
'... Tip portion of rotation control member, 9b, 9b'...
Long hole, 9c, 9c'... recess, 9d, 9d'...
Base end portion, 10... Head base, 10a... Pin, 10b... Locking part, 11... Magnetic head, 12
... Pinch roller, 12a ... Support arm, 12
b... Protrusion, 12c... Support shaft, 13... Capstan, 14... Cam plate for driving the head base, 14
a... Protruding top, 15... Chassis, 15a...
Elongated hole, 16...Circular cam plate for mode detection, 17...
...Detection switch, 17a, 17a'...Protrusion, 1
7b, 17b'...Elastic piece, 17c, 17c'...
...Switch, A~H...Miohole.

Claims

[Scope of utility model registration request]

A circular cam for mode detection that has a cam plate for driving the head base, a cam plate for driving the tape reel, and a plurality of cams for operating switches formed at predetermined positions on the peripheral edge that rotates coaxially and integrally with these cam plates. A detection switch that is turned on and off by a cam that operates the switch by rotating the circular cam plate for mode detection, and a detection switch that turns on and off the power supply and changes the polarity of the power supply by turning the detection switch on and off. A mode switching mechanism for a tape recorder, comprising: a motor for rotating each of the cam plates.