JPS6239247U

JPS6239247U -

Info

Publication number: JPS6239247U
Application number: JP12891185U
Authority: JP
Priority date: 1985-08-26
Filing date: 1985-08-26
Publication date: 1987-03-09

Description

[Brief explanation of the drawing]

第１図は本考案の一実施例を示しａは平面図お
よび動作を説明するブロツク図、ｂはａのＡ―Ａ
断面図、第２図はＶＴＲのテープ走行系を説明す
る図、第３図、第４図は従来のテンシヨンアーム
アセンブリの例を示す図で、第３図は平面図、第
４図は縦断面図、第５図はテープ走行系上でのテ
ンシヨンアームの位置を説明する図である。２：テープ、５０：ポスト、５２：シヤフト、
５３：アーム、７１，７６：歯車、７５：モータ
、７８ａ，７８ｂ：フオトセンサ。 Fig. 1 shows an embodiment of the present invention, a is a plan view and a block diagram explaining the operation, and b is an A--A of a.
2 is a diagram explaining the tape running system of a VTR, 3 and 4 are diagrams showing an example of a conventional tension arm assembly, 3 is a plan view, and 4 is a longitudinal section. The top view and FIG. 5 are diagrams for explaining the position of the tension arm on the tape running system. 2: Tape, 50: Post, 52: Shaft,
53: Arm, 71, 76: Gear, 75: Motor, 78a, 78b: Photo sensor.

Claims

[Scope of utility model registration request]

a housing, a bearing inserted into the housing, a shaft supported by the bearing, an arm provided at one end of the shaft and having one end fixed thereto, and a tape guide fixed to the other end of the arm; a tension arm device comprising a spring biasing means for the arm; a first gear disposed coaxially with the shaft on the outer periphery of the housing and rotatable with respect to the housing; and a first gear meshing with the gear; a second gear; a drive source for the gear; and a second gear.
a detector for detecting the position of the first gear or a position substantially equivalent thereto, and means for engaging the first gear and the arm with a predetermined distance,
The tensioner is characterized in that when the drive source is turned on, the arm is moved to a position detected by the detector against the biasing force of the spring biasing means. Arm drive device.