公开(公告)号：JP2001250298A

公开(公告)日：2001-09-14

申请号：JP2000057603

申请日：2000-03-02

Applicant: SONY CORP

Inventor： MAEHARA MASANORI ,  TOMITA MINORU ,  SAWADA TOSHIYA

IPC: G11B15/665

Abstract: PROBLEM TO BE SOLVED: To provide a mechanism strong against impacts and capable of performing a smooth LS(Linear Skating) operation. SOLUTION: To enable an LS main body part to perform an LS operation in the upper position of a tape driving control main body part, the LS main body part is provided with a long LS guide in its bottom in an LS operation direction, and an LS guide projected part in the side wall surface outer side of a position away from the LS guide groove in the LS operation direction, and the tape driving control main body is provided with an LS guide shaft to be engaged with the LS guide groove, and a guide groove to be engaged with the LS guide projected part. The cam plate of the LS main body part having a cam groove following the movement of an LS main body guide arm provided in the tape driving control main body side is moved in a direction orthogonal to the LS operation direction, in which the LS main body part is moved, and then the position is adjusted.

公开(公告)号：JPH05182301A

公开(公告)日：1993-07-23

申请号：JP34450091

申请日：1991-12-26

Applicant: SONY CORP

Inventor： KUSUI YOSHIO ,  OSHIMA EIJI ,  KUMANO AKIRA ,  MAEHARA MASANORI

IPC: G11B15/32

Abstract: PURPOSE:To reduce the number of parts and manpower of the assembly by integrating a reel claw for engaging a reel to be wound with a magnetic tape with a reel base. CONSTITUTION:An arm piece 12 is deformably erected on the reel base 11 in the radial direction at a required space from a bearing cylinder 11a, and the reel claw 13 is projectively provided outwardly on the tip of this arm piece 12. When an engagement claw part 9 of the reel 7 runs on this reel claw 13, the reel claw 13 is pressed and the arm piece 12 is inclined and deformed to escape from the engagement claw part 9, thus preventing the reel 7 from floating to the reel base 11.

公开(公告)号：JPH0547083A

公开(公告)日：1993-02-26

申请号：JP22358991

申请日：1991-08-09

Applicant: SONY CORP

Inventor： TAKASE MASATAKE ,  KUSUI YOSHIO ,  MAEHARA MASANORI ,  YOSHIDA HIDEJI

IPC: G11B15/665 ,  G11B15/675 ,  G11B33/12

Abstract: PURPOSE:To prevent a tape from running onto a head drum due to the move ment of a lid to an opening position with the tape adhered to the lid by static electricity and to perform it without using any special means in the tape player using a tape cassette where free rotational lid which moves between the closed position covering a tape and the opening position above it running through the tape pulling surface. CONSTITUTION:A tape cassette 2 with a front lid 16 and a back lid 17 makes distance L1 between the tip of the back lid mounted on a cassette installation part 22 and a head drum 33 to 1.2-times of width of a magnetic tape 10. Distance L2 in the transverse direction of the tape cassette between the tip of the back lid and the upper surface of the head drum is two-thirds of the above- mentioned tape.

公开(公告)号：JPH01124136A

公开(公告)日：1989-05-17

申请号：JP28095987

申请日：1987-11-09

Applicant: SONY CORP

Inventor： TSUYAMA MANABU ,  MAEHARA MASANORI ,  OSHIMA EIJI

IPC: G11B15/26

Abstract: PURPOSE:To reduce the load exerted on a tape at the tape rewinding time and to reduce the electric power consumption of a reel motor, etc. by rotating a rotary drum in the reverse direction to recording and reproducing times with winding the tape on the rotary drum. CONSTITUTION:When a rewinding switch 1 is pushed, a drum motor 4 is reversed by switching the driving circuit 3 of a rotary drum by the controller 2 of a microcomputer, etc. The rewinding travel of the tape is started at about the same time or just before the start of the reversal of the drum motor 4. The rotary drum is reversed at about several times or 30 times speed compared to recording and reproducing times. The load exerted on the tape is thus reduced drastically, the tape damage accompanied by the tape traveling is also reduced and the electric power consumption of a reel motor, etc. for driving the tape traveling is reduced as well.

公开(公告)号：JPS6244085A

公开(公告)日：1987-02-26

申请号：JP18129085

申请日：1985-08-19

Applicant: SONY CORP

Inventor： MAEHARA MASANORI ,  OOSHIMA EIJI ,  KAMOSHITA SHINGEN

IPC: H02P29/00 ,  G11B15/665

Abstract: PURPOSE:To decelerate the available rotating speed of a motor without decreasing a starting torque by providing a voltage limiter for holding the terminal voltage of the motor constant and a servo circuit for holding the rotating speed of the motor constant. CONSTITUTION:A current flows to a motor 1 through transistors Q1, Q2. When the emitter voltage of a transistor Q4 becomes the set voltage or higher, the transistor Q4 becomes ON so that the terminal voltage Vm of the motor 1 is suppressed to the set voltage. When a voltage Vc in responses to a current flowing to the motor 1 output from a transistor Q3 becomes the prescribed value or higher, a transistor Q5 is conducted, the current flowing to the motor is maintained at the value in response to the load torque of the motor 1 to operate a servo for holding the rotating speed of the motor 1 constant.

公开(公告)号：JP2002183920A

公开(公告)日：2002-06-28

申请号：JP2000379023

申请日：2000-12-13

Applicant: SONY CORP

Inventor： OAMI TADASHI ,  ENDO JUNYA ,  MAEHARA MASANORI ,  KIKO SHINKO ,  MISHIRO MIZUYOSHI ,  SHINKAI KENTARO

IPC: G11B5/10 ,  G11B5/52 ,  G11B5/53 ,  G11B5/584

Abstract: PROBLEM TO BE SOLVED: To reduce the manufacturing cost of an upper drum. SOLUTION: The sticking of a magnetic tape 2 to the head drum device 3 by the electrostatic charge is prevented in such a manner that a synthetic resin containing a carbon is used as the material of the upper drum 33. Also, the precision working accuracy is not required for the manufacture of the upper drum 33 by means of forming the outside diameter of the upper drum 33 to be smaller than the outside diameter of a middle drum 32. Thus, the reduction of the manufacturing cost of the upper drum 33 is attained.

公开(公告)号：JP2586467B2

公开(公告)日：1997-02-26

申请号：JP1189287

申请日：1987-01-21

Applicant: SONY CORP

Inventor： MAEHARA MASANORI ,  KUMAGAI TAKAO ,  YOSHIDA HIDEJI ,  TSUYAMA MANABU

IPC: G11B15/665 ,  G11B15/675

公开(公告)号：JPH0817178A

公开(公告)日：1996-01-19

申请号：JP16873494

申请日：1994-06-27

Applicant: SONY CORP

Inventor： MAEHARA MASANORI ,  JINBO HIDETO ,  TAKASAKI SABURO

IPC: G11B33/12

Abstract: PURPOSE:To secure a height for keeping a slide chassis horizontally and positively by supporting a slide chassis by a long hole for vertical shaft and a long hole for horizontal shaft for a mechanical chassis. CONSTITUTION:A slide chassis 3 is supported so that it can slide in the forward and backward directions for a mechanical chassis 1 and a required height T of the slide chassis 3 can be maintained and at the same time the rotation of the slide chassis 3 can be regulated. Therefore, the slide chassis 3 can be supported for the mechanical chassis 1 so that it can be slid by two horizontal shafts 21 and 23 and long holes 27 and 29 which are engaged to them, thus positively securing a height for maintaining the slide chassis 3 horizontally and at the same time regulating the rotation of the slide chassis 3.

公开(公告)号：JPH05174453A

公开(公告)日：1993-07-13

申请号：JP33871691

申请日：1991-12-20

Applicant: SONY CORP

Inventor： MAEHARA MASANORI ,  KUSUI YOSHIO ,  KUMANO AKIRA ,  YOSHIDA HIDEJI

IPC: G11B15/43 ,  G11B15/665

Abstract: PURPOSE:To prevent the occurrence of a tape damage by reducing the tape tension during a fast tape winding of a recording and reproducing device. CONSTITUTION:A base end section 20b of a tension spring 20, which rotationally pressing a tension arm 28, is connected to a slider 31 which performs a sliding operation in accordance with the tape fast forwarding operations. During a tape fast forwarding, the slider 31 is slid, the end section 20b of the spring 20 is moved closer to the axis supporting point of the tension arm 28. Thus, rotational pressing force of the spring 20 against the tension arm 28 is reduced resulting in a reduction of a back tension against the tape.

公开(公告)号：JPH0264956A

公开(公告)日：1990-03-05

申请号：JP21667888

申请日：1988-08-31

Applicant: SONY CORP

Inventor： YOSHIDA HIDEJI ,  SAITO AKIRA ,  OSHIMA EIJI ,  MAEHARA MASANORI

IPC: G11B15/61 ,  G11B15/665 ,  G11B15/675

Abstract: PURPOSE:To prevent a tape from being run onto a rotary head drum by shutting a gap between a cover body and the circumference surface of the rotary head drum with a tape shutter, which is turned in the vertical direction when the cover body of a tape cassette is opened. CONSTITUTION:The tip of a tape shutter 27 contacts a circumference surface 4a of a rotary head drum 4 and completely shuts a gap A between a cover body 8 and the circumference surface 4a of the rotary head drum 4 when the cover body 8 is opened. Accordingly, for example, even when looseness is generated in a tape 9 between front opening parts 7a and 7b of a tape cassette 7 to be opened by the opening of the cover body 8 and this tape 9 tends to jump out on the rotary head drum 4 simultaneously with the slight opening of the cover body 8, the tape shutter 27 goes to be a wall and the tape 9 is not run onto the rotary head drum 4. Then, the tape 9 is securely guided between the circumference surface 4a of the rotary head drum 4 and the cassette 7 by the tape shutter 27. Thus, the tape 9 can be prevented from being loaded on the rotary head drum 4.