JPH0212741U

JPH0212741U -

Info

Publication number: JPH0212741U
Application number: JP9044788U
Authority: JP
Priority date: 1988-07-06
Filing date: 1988-07-06
Publication date: 1990-01-26

Description

[Brief explanation of the drawing]

第１図は本考案が実施例される磁気テープ再生
／記録装置３０の概略的構成を示す平面図、第２
図は本考案の一実施例を示すリール軸５２ａとそ
れに関連する構成を示す断面図、第３図はその分
解斜視図、第４図は本考案の他の実施例の断面図
、第５図はその分解斜視図、第６図は本考案のさ
らに他の実施例の平面図、第７図はフライホイル
３５ａとそれに関連する構成を示す断面図、第８
図は本考案のさらに他の実施例の断面図、第９図
は従来のすべり摩擦機構を示すリール軸１付近の
分解斜視図である。３０……磁気テープ再生／記録装置、３１……
シヤーシ、３５ａ，３５ｂ……フライホイル、３
８ａ，３８ｂ……キヤプスタン、３９ａ，３９ｂ
……駆動歯車、４０ａ，４０ｂ……ピンチローラ
、４３……磁気テープカセツト、４４……磁気テ
ープ、４５……ヘツド、５０ａ，５０ｂ……再生
／記録用アイドラ歯車、５１……早送り用アイド
ラ歯車、５２ａ，５２ｂ……リール軸、５３，１
０１……第１歯車、５４，１０２……第２歯車、
６１，９９……上面、６２，７９，７８，１００
，１１５，１１６……摩擦部材、６３……下面、
６４，１１１……第１歯車の下面、６５，１１３
……第２歯車の下面、６７，６８，８２，１０５
，１０６……圧縮コイルばね、８３……板ばね。 FIG. 1 is a plan view showing a schematic configuration of a magnetic tape reproducing/recording device 30 in which the present invention is implemented;
3 is an exploded perspective view of the reel shaft 52a and its related structure, FIG. 4 is a sectional view of another embodiment of the invention, and FIG. 6 is a plan view of still another embodiment of the present invention, FIG. 7 is a cross-sectional view showing the flywheel 35a and related structures, and FIG. 8 is an exploded perspective view of the same.
The figure is a sectional view of still another embodiment of the present invention, and FIG. 9 is an exploded perspective view of the vicinity of the reel shaft 1 showing a conventional sliding friction mechanism. 30... Magnetic tape playback/recording device, 31...
Chassis, 35a, 35b...Fly foil, 3
8a, 38b... Capstan, 39a, 39b
...Drive gear, 40a, 40b...Pinch roller, 43...Magnetic tape cassette, 44...Magnetic tape, 45...Head, 50a, 50b...Idler gear for playback/recording, 51...Idler gear for fast forwarding , 52a, 52b...Reel shaft, 53, 1
01...First gear, 54,102...Second gear,
61,99...Top surface, 62,79,78,100
, 115, 116...Friction member, 63...Bottom surface,
64,111...lower surface of the first gear, 65,113
...Bottom surface of second gear, 67, 68, 82, 105
, 106... Compression coil spring, 83... Leaf spring.

Claims

[Claims for Utility Model Registration] (1) Power from the flywheel is selectively passed through the playback/recording idler gear and the fast-forwarding idler gear to drive the playback/recording idler gear installed on the reel shaft.
A magnetic tape running device configured to drive a reel shaft by transmitting power to a first gear meshing with the recording idler gear and a second gear meshing with the fast-forwarding idler gear, each of which is fixed to the reel shaft. and a friction member having one end in contact with one end surface of the friction plate, the first gear and the second gear being arranged on one side in the axial direction of the reel shaft with respect to the friction plate. and the first and second gears are coaxially arranged to contact the friction member at different positions in the radial direction of the friction plate, and the friction force between the first gear and the friction plate through the friction member is , a magnetic tape running device characterized in that the friction force is selected to be smaller than the friction force through the friction member between the second gear and the friction plate. (2) A friction member is arranged coaxially with the friction surface formed integrally with the flywheel so that one end surface of the friction member is in contact with the flywheel, and the flywheel has a friction member at a different position in the radial direction from the friction member. A first gear that meshes with the abutting playback/recording idler gear and a second gear that meshes with the fast-forward idler gear are provided coaxially with the flywheel. A reel shaft driving gear is integrally provided on the reel shaft, and is integrally provided with the reel shaft, and is selectively meshed with the fast-forward idler gear, and is meshed with the playback/recording idler gear and the fast-forwarding idler gear. The friction force through the friction member between the first gear and the friction surface is selected to be smaller than the friction force through the friction member between the friction surface and the second gear meshing with the fast-forward idler gear. A magnetic tape running device.