公开(公告)号：JPH0196856A

公开(公告)日：1989-04-14

申请号：JP25431187

申请日：1987-10-08

Applicant: SONY CORP

Inventor： KUSUI YOSHIO ,  OSHIMA EIJI

IPC: G11B15/665 ,  G11B15/61

Abstract: PURPOSE:To securely guide a tape, which is issued out from the front surface opening part of a tape cassette, to the circumferential surface side of a rotary head drum by providing a tape guiding member above the rotary head drum in the direction of a tape cassette cover freely press-movably when the cover is opened. CONSTITUTION:When a tape cassette 40 is inserted into a cassette holder 20 and the cassette 40 is fitted to a pair of reel bases and a positioning pin on a linear skate chassis 7, while the cassette 40 is fitted, a cover 41 of the cassette 40 is started to open by a pin 18 at a vertical rising piece part 7b of the chassis 7. By the cover 41 to open, a tip part 34b of a tape guiding arm 34 is slightly turned to the central side of a rotary head drum 3. Since a tape T is loosened, which is positioned between a pair of front surface opening parts 42 of the cassette 40 opened by the opening of the cover 41, the tip part 34b of the arm 34 is made into a wall to prevent the tape T from issuing out abruptly, and the tape T is securely guided between a circumferential surface 3a of the drum 3 and the cassette 40.

公开(公告)号：JPS63214544A

公开(公告)日：1988-09-07

申请号：JP4421187

申请日：1987-02-27

Applicant: SONY CORP

Inventor： OSHIMA EIJI ,  KUMAGAI ATSUHIRO

IPC: F16H1/32 ,  F16H49/00

Abstract: PURPOSE:To obtain a high reduction ratio by providing such an arrangement that a wave gear having a number of teeth different from that of a speed change gear is elastically deformed so as to be meshed with the speed change gear, and during speed reduction an arm of a pressing means is rotated to rotate the speed change gear by a degree corresponding to the difference between the numbers of teeth while the wave gear is squeezed. CONSTITUTION:A wave gear 1 having a tooth number of 64 and a speed change gear having a tooth number of 66 are arranged separated from each other, and when an arm 7 is rotated, rolls 10 as pressing means elastically deform the wave gear 1, a part of the tooth section 1a which meshes with a part of the tooth section 4a of the speed change gear 4 moves the meshed part of the latter. In this arrangement, if the elastically deformable wave gear 1 is fixed, the tooth section 1a presses the tooth section 4a while it is squeezed to a degree corresponding to the difference between the tooth numbers, and when the arm 7 is rotated, the speed change gear 4 is rotated by the difference between the tooth numbers or by two teeth. Thus, it is possible to obtain a high reduction ratio even with an one stage gear arrangement, thereby it is possible to making the reduction mechanism small and lightweight.