公开(公告)号：JPH05246450A

公开(公告)日：1993-09-24

申请号：JP4418492

申请日：1992-03-02

Applicant: SONY CORP

Inventor： KOIZUMI OSAMU

IPC: B65D43/22 ,  B65D45/18

Abstract: PURPOSE:To perform the fastening operation smoothly while raising the fastening force of a lid body to a box body, and lowering the operation force required to close the lid at the same time by a method wherein projections are formed on the box body, and at the same time, the guide surfaces on the opening direction sides are formed by tilted surfaces which have a steeper gradient than that of the guide surfaces on the closing direction sides. CONSTITUTION:A case 11, in which a tape cassette A is stored, is equipped with a box body 12 which opens on one side, and a lid body 13 which opens or closes an opening 12a of the box body 12. In this case, a plurality of projections 24, 25 are formed on the lid body 13, and at the same time, a plurality of fastening holes 16, 17 and a plurality of fastening protuberances 20, 21, which are fastened with the projections 24, 25, are formed on the box body 12. Respective projections 24, 25 are formed of two guide surfaces 24 (a, b), 25 (a, b), which are tilted to the opposite directions to each other. Respective guide surfaces 24 on the opening direction side are formed by tilted surfaces which have a steeper gradient than that of respective guide surfaces 25 on the closing direction side. By this method, the fastening force of the lid body 13 to the box body 12 is raised while the force required to close the lid is lowered, and the fastening operation of respective projections 24, 25 is smoothly performed.

公开(公告)号：JPH0554193B2

公开(公告)日：1993-08-11

申请号：JP11649187

申请日：1987-05-13

Applicant: SONY CORP

Inventor： KOIZUMI OSAMU ,  NEMOTO TSUNEO ,  SUGAWARA KOKICHI

IPC: G11B23/03

公开(公告)号：JPH0253281A

公开(公告)日：1990-02-22

申请号：JP20354088

申请日：1988-08-16

Applicant: SONY CORP

Inventor： KOIZUMI OSAMU ,  SASAKI KAZUO

IPC: G11B23/03

Abstract: PURPOSE:To rapidly and easily perform the assembly of a shutter opening/ closing mechanism by providing a temporary connecting part to connect a torsion spring transiently to a rocking member. CONSTITUTION:The temporary connecting part 31 to connect the torsion spring 22 to the rocking member 23 transiently is provided. The assembly of the shutter opening/closing mechanism 11 is performed in such a way that the torsion spring 22 is arranged at a prescribed position on a lower case member 3 and also, the rocking member 23 is supported. Thereby, the torsion spring 22 is connected to the temporary connecting part 31 of the rocking member 23, which prevents the torsion spring 22 from being deviated from the prescribed position even when some external force, etc., is applied. Working such that an upper case member is joined with the lower case member 3 in such state, and after that, the function of the torsion spring 22 is applied on the shutter 13 by inserting the shutter 13 to a case, are performed. In such a way, it is possible to rapidly and easily perform assembling work.

公开(公告)号：JPS63164086A

公开(公告)日：1988-07-07

申请号：JP30813586

申请日：1986-12-26

Applicant: SONY CORP

Inventor： KOIZUMI OSAMU ,  NODA MASAYUKI ,  TAGUCHI KEIICHI

IPC: G11B25/10 ,  G11B17/028 ,  G11B19/20

Abstract: PURPOSE:To improve low flutter by providing a rotating speed control circuit for a motor, rotating the motor more than one revolution of the regular rotation and reverse rotation at a speed less than the standard number of revolutions at the time of chucking a center core to a turntable. CONSTITUTION:The rotating speed control circuit for the motor consists of a switch control circuit 30, switch circuit 31, reference clock generator 32 and motor control circuit 33, etc. When the circuit 30 is fed by a signal of detection that the center core of a tape cassette is mounted onto the turntable, firstly, a switch 31A of the circuit 31 is switched over to a resistor RF1 having a large resistance value, and then the reference clock to be fed to the circuit 33 from the generator 32 is low in frequency, so that the number of revolutions of the motor 26 is less than the standard number of revolutions and this rotation is made for more than a fixed period of time. Secondly, a switch 31B is switched over to RR2 of a large resistance value, reversing the rotation direction. In this way, the center core can be chucked to the turntable under the normal state, and the table speed becomes constant, thus eventually improving low flutter.

公开(公告)号：JPH1092146A

公开(公告)日：1998-04-10

申请号：JP24454396

申请日：1996-09-17

Applicant: SONY CORP

Inventor： IWAKI YUJI ,  KOIZUMI OSAMU ,  SASAKI KAZUO ,  MEGURO HIROSHI ,  FUKUDA TAIZO

IPC: G11B23/28

Abstract: PROBLEM TO BE SOLVED: To provide a cassette for recording and reproducing apparatus capable of surely and easily moving a write protector between a write-enabling position and a write-prohibiting position. SOLUTION: On a back face of a cassette body 2, a recess portion 7 is formed along which a write protector 5 is to slide. In addition, on a side face of the cassette body 2, a tab groove 11 is formed along which a side tab 13 of the write protector 5 is to slide. Furthermore, on a surface of the side tab 13, a concave and convex portion 15 for manipulation is formed.

公开(公告)号：JPH0991914A

公开(公告)日：1997-04-04

申请号：JP27074395

申请日：1995-09-26

Applicant: SONY CORP

Inventor： KOIZUMI OSAMU

IPC: G11B23/03

Abstract: PROBLEM TO BE SOLVED: To enable application to a disc drive conforming to a 3.5 inch form factor, and increase a data-recording capacity. SOLUTION: Front edges of a pair of upper and lower recording/reproducing window holes 8 of a cartridge 22 are notched to form opening ends 8b, whereby a diameter D2 of a floppy disc 24 is easily enlarged. Alternatively, a radius of the outermost circumference of a recording area of the floppy disc 24 is enlarged.

公开(公告)号：JPH0991827A

公开(公告)日：1997-04-04

申请号：JP27074195

申请日：1995-09-26

Applicant: SONY CORP

Inventor： SAITO KENGO ,  NAKAJIMA IKUYUKI ,  KOIZUMI OSAMU ,  TAKAHASHI YUJI

IPC: G11B23/00 ,  G11B17/04 ,  G11B17/043

Abstract: PROBLEM TO BE SOLVED: To selectively load two kinds of disk cartridges, the large cartridge and the small cartridge, inside which floppy disks having different diameters, a large diameter and a small diameter, are housed. SOLUTION: This system is provided with a small-sized disk cartridge inside which a small-diameter floppy disk is housed and a large-sized disk cartridge 21 inside which a large-diameter floppy disk 24 is housed and which is constituted so that at least its width on a trailing edge 22b side may be larger than that of the small-sized disk cartridge. And also, it is provided with a centering guide 61 centering the leading edge 22a side of the small-sized disk cartridge and the large-sized disk cartridge 21 in common and positioning the small-sized disk cartridge and the large-sized disk cartridge 21 on the same center P2 of a cartridge holder 35.

公开(公告)号：JPH08321104A

公开(公告)日：1996-12-03

申请号：JP15121395

申请日：1995-05-26

Applicant: SONY CORP

Inventor： KOIZUMI OSAMU

IPC: G11B33/02 ,  G11B5/008 ,  G11B15/675 ,  G11B23/087

Abstract: PURPOSE: To set the height of a front panel to be not larger than 1 inch and a lateral width to be not larger than 4 inches in spite of being capable of commonly using data cartridges of a large capacity. CONSTITUTION: A pair of right and left step difference parts 43d, 63b are formed respectively at a pair of right and left corners of an upper edge of a laterally rectangular cartridge insertion opening 43 formed in a front panel 42 and a pair of right and left corners of an upper edge 63a of an opening/closing lid 63 opening/closing the insertion opening 43 from the inside. The opening/closing lid 63 is rotatably mounted inside the front panel 42 via a pair of right and left supporting shafts 64 in the step difference parts 43d, 63b.

公开(公告)号：JPH08321103A

公开(公告)日：1996-12-03

申请号：JP15121295

申请日：1995-05-26

Applicant: SONY CORP

Inventor： KOIZUMI OSAMU

IPC: G11B15/675

Abstract: PURPOSE: To stably fix a set data cartridge. CONSTITUTION: A data cartridge 5(1) of a large capacity inserted in a cartridge insertion opening 43 of a front, panel 42 is elastically pressed from above and fixed by use of an opening/closing lid 63 and a leaf spring 54 at a position near the inside of the front panel 42.

公开(公告)号：JPH08287565A

公开(公告)日：1996-11-01

申请号：JP8507395

申请日：1995-04-11

Applicant: SONY CORP

Inventor： HIRANO TAKAYASU ,  SAITO KENGO ,  KOIZUMI OSAMU ,  SATO MASANORI

IPC: G11B15/675

Abstract: PURPOSE: To obtain a recording and reproducing device usable even for a data cartridge increased in width in order to increase a recording capacity. CONSTITUTION: The front panel 2 side of this recording and reproducing device 1 is provided with a cartridge insertion part 3. A first locator 4 is arranged in one side part of this cartridge insertion part 3. The cartridge insertion part 3 is provided with a second locator 5 for guiding the insertion of the first data cartridge 201 with the first locator 4 near the other side part of the insertion part. The outer side of this second locator 5 is provided with a third locator 6 for guiding the insertion of the second data cartridge 301 broader than the first data cartridge 201 with the first locator 4. The second locator 5 is so constituted as to retreat outside the cartridge insertion part 3 at the time of inserting the second data cartridge.