JPH0420632U

JPH0420632U -

Info

Publication number: JPH0420632U
Application number: JP6289590U
Authority: JP
Priority date: 1990-06-14
Filing date: 1990-06-14
Publication date: 1992-02-20

Description

[Brief explanation of the drawing]

第１図から第７図はこの考案の一実施例にかか
る磁気テープ記録再生装置のリール台制動機構を
示し、第１図が平面図、第２図が一の主要部分の
平面図、第３図が一の部品の平面図、第４図が他
の一の主要部分の断面図、第５図がまた他の一の
主要部分の断面図、第６図ａ，ｂ，ｃ，ｄがそれ
ぞれ異なる作動状態を表す作用を説明するための
平面図、第７図が磁気テープ記録再生装置として
のＶＴＲのテープ走行系の模式図である。１０，２０……ギア、２２……供給リール台、
２３……巻取リール台、２５……磁気テープ、３
７……モードコントロールモータ、３７ａ……回
転軸、３８，４０……ブレーキアーム、３９，４
１……ロツクギア、４２……スライドプレート、
４３……コントロールプレート、４４……リール
台制動機構、４６，５０……パツド、４７，５１
，５６，６１……カムピン、５２，５３……カム
部、５７，６０……カム溝、７１……ロツクレバ
ー（ロツク部材）、７２……スプリング、７３…
…キヤンセル部材、７７……トーシヨンスプリン
グ。 1 to 7 show a reel stand braking mechanism of a magnetic tape recording/reproducing apparatus according to an embodiment of the invention, in which FIG. 1 is a plan view, FIG. 2 is a plan view of the main parts of 1, and 3 Figure 4 is a plan view of one part, Figure 4 is a sectional view of the main part of the other part, Figure 5 is a sectional view of the main part of the other part, and Figures 6 a, b, c, and d are respectively FIG. 7 is a plan view for explaining the effects of different operating states, and is a schematic diagram of a tape running system of a VTR as a magnetic tape recording/reproducing device. 10, 20...gear, 22...supply reel stand,
23...Take-up reel stand, 25...Magnetic tape, 3
7... Mode control motor, 37a... Rotating shaft, 38, 40... Brake arm, 39, 4
1... Lock gear, 42... Slide plate,
43... Control plate, 44... Reel stand braking mechanism, 46, 50... Pad, 47, 51
, 56, 61... cam pin, 52, 53... cam portion, 57, 60... cam groove, 71... lock lever (lock member), 72... spring, 73...
... Cancel member, 77... Torsion spring.

Claims

[Claim for Utility Model Registration] A brake arm is swingably supported near the reel stand on which the reel wound with tape is placed,
In the reel stand braking mechanism of a magnetic tape recording and reproducing device, which brakes the rotation of the reel stand by bringing this brake arm into contact with the reel stand, the rotating shaft rotates in one direction when transitioning to fast forward and rewind modes, and switches to stop mode. A mode control motor rotates in the other direction during transition, and this mode control motor is driven according to the mode to move linearly in a direction perpendicular to the rotation axis of the mode control motor, and when in stop mode, it is located at the stop position and fast forwards or rewinds. There is a control plate that is located at the fast forward/rewind position in the mode, and this control plate is provided so that it can move relative to the control plate in the direction of movement of the control plate, and when the brake arm is moved toward the stop position, the brake arm is brought into contact with the reel stand to perform fast forward/rewind. A slide plate that separates the brake arm from the reel stand when moved toward the rewind position, and a slide plate that is swingably supported by the slide plate.
A lock member that locks the control plate by swinging in one direction and connects the slide plate and the control plate so that they can move together; a spring that biases the slide plate toward the stop position; and a mode control motor. is installed on the rotating shaft so that it rotates together when the rotating shaft rotates in the other direction,
A reel stand braking mechanism for a magnetic tape recording and reproducing apparatus, comprising a cancel member that comes into contact with the lock member and releases the lock member from the control plate when the rotation shaft rotates in the other direction.