公开(公告)号：JPH04356779A

公开(公告)日：1992-12-10

申请号：JP3776791

申请日：1991-02-08

Applicant: SONY CORP

Inventor： SUGIYAMA MASANOBU ,  NAKAMARU KAZUKI ,  SATO KIYOTO

IPC: G11B23/087

Abstract: PURPOSE:To prevent abrasion of a tape due to contact of an end surface of a sliding sheet with a side surface of the tape wound around a reel hub and dirt due to magnetic powder from progressing respectively. CONSTITUTION:The sheets 7 and 8 arranged as sliding bodies above and below the reel hubs 4 and 5 in a tape cassette are formed to have their side surface shapes in the vertical direction to a line combined between individual centers of the reel hubs 4 and 5 to be curved in approximately circular-arcuate in the direction of positioning the reel hubs 4 and 5 inside a circular arc, while only both end parts of the curved individual sheets 7 and 8 are curved in the direction opposite to the direction of the curve.

公开(公告)号：JPH04332982A

公开(公告)日：1992-11-19

申请号：JP12823991

申请日：1991-05-02

Applicant: SONY CORP

Inventor： SUGIYAMA MASANOBU

IPC: G11B23/087

Abstract: PURPOSE:To prevent the occurrence of such a case that a slider lock spring is caught by the tip of a pin which is used for fitting the slider lock spring and the spring is buckled. CONSTITUTION:A slider lock spring 20 is fitted by inserting a pin 2b protruding to an upper shell into the coil-wound section 20a of the spring and, at the same time, the part of the coil-wound section 20a corresponding to the tip of the pin 2b is closely wound.

公开(公告)号：JPH0457264A

公开(公告)日：1992-02-25

申请号：JP16510490

申请日：1990-06-22

Applicant: SONY CORP

Inventor： MEGURO HIROSHI ,  SUGIYAMA MASANOBU

IPC: G11B23/087

Abstract: PURPOSE:To surely attach a leaf spring to a specified attaching position by reinforcing an elastic locking piece for locking a slider by the use of the leaf spring and providing a position regulating means for the leaf spring at the attaching part of the leaf spring. CONSTITUTION:In this tape cassette, the metallic leaf spring 20 for reinforcing the engaging force of the elastic locking piece 16 with the slider is attached on the inner surface side of the bottom of the lower half 4 of a cassette housing 2. A position regulating rib 24 is provided as the position regulating means for the leaf spring 20 around the attaching part of the spring 20. By pressing the outer edge of the base end part of the spring 20 by the use of the rib 24, the spring 20 is surely fixed and held so that it may not turn in a caulking part.

公开(公告)号：JPH0628819A

公开(公告)日：1994-02-04

申请号：JP15562593

申请日：1993-06-25

Applicant: SONY CORP

Inventor： SUGIYAMA MASANOBU ,  MEGURO HIROSHI

IPC: G11B23/087

Abstract: PURPOSE:To prevent a hub locking member from being temporarily fixed again unexpectedly under the ordinary using state after completing the assembly. CONSTITUTION:In such a tape cassette that the hub locking member 13 for regulating the rotation of a reel hub 7 in a cassette shell is equipped and this hub locking member 13 is temporarily fixed on an upper shell 3 of the cassette shell (an engagement recessed part 16 of the hub locking member 13 is engaged with a fixing pin 15 of the upper shell 3) in the outside of a normal moving range in view of the assemblage at the time of assembling the cassette, the hub locking member 13 is provided with a notched recessed part 18 having a prescribed width in the moving direction of the member 13. A stopper protrusion piece 19 is provided to be corresponding to this part 18 on the cassette shell side, and the structure is constituted not to allow the hub locking member 13 to move to a temporarily fixing position by abutting this stopper protrusion piece 19 against a peripheral part of the notched recessed part 18.

公开(公告)号：JPH04324177A

公开(公告)日：1992-11-13

申请号：JP9444691

申请日：1991-04-24

Applicant: SONY CORP

Inventor： SUGIYAMA MASANOBU

IPC: G11B23/087

Abstract: PURPOSE:To prevent short-mold due to thin structure in the bottom part of slider-lock pieces in a tape cassette whose slider-lock pieces to lock a slider respectively opening and closing the inserting part of the guiding part for loading, etc., in an opening position and a closing position are integrally molded with a lower half. CONSTITUTION:The position of a gate G for injecting resin to mold the lower half 4 is set near the bottom part of the slider-lock pieces 16.

公开(公告)号：JPH04268271A

公开(公告)日：1992-09-24

申请号：JP4874191

申请日：1991-02-22

Applicant: SONY CORP

Inventor： SUGIYAMA MASANOBU

IPC: G11B23/087

Abstract: PURPOSE:To prevent a slider lock spring from falling off, inclining and falling down at the time of assembling the tape cassette and to promote operability and also to prevent the occurrence of defective setting of the slider lock spring. CONSTITUTION:In the tape cassette having a spring member 10 interposed between a slider lock member 3b for positionally locking a slider 6 and an upper shell 2, one end 10a1 of a coil winding part 10a of the spring member 10 is extended under a noncoil state, and this extended part 10b is fixedly held by the upper shell 2.

公开(公告)号：JPH0628821A

公开(公告)日：1994-02-04

申请号：JP14928993

申请日：1993-06-21

Applicant: SONY CORP

Inventor： SUGIYAMA MASANOBU

IPC: G11B23/087

Abstract: PURPOSE:To prevent deterioration of the winding state of a tape due to dropping the winding surface of the tape lower than a projecting part formed on a lower slidable sheet and to ensure the smooth traveling of the tape in the tape cassette housing the tape wound around one pair of reel hubs by holding the tape between slidable sheets. CONSTITUTION:This is the tape cassette for housing the tape 8 wound around one pair of reel hubs 9a and 9b by holding it between the slidable sheets 10 and 11. A projecting part 14 to be in slide contact with the lower side of the tape winding surface is formed on the lower slidable sheet 13 arranged on the lower side of the tape 8, i.e., the inner surface side of a lower cassette half 3, and lower end parts of sleeve parts 9a1 and 9a2 of the reel hubs 9a and 9b to be projected downward from this lower slidable sheet 13 are extended, and these extended parts 9a2 and 9b2 are brought into contact with the inner surface side of the lower cassette half, and hence loads of the reel hubs 9a and 9b and the tape 8 wound around the reel hubs 9a and 9b can thus be received by the lower cassette half 3.

公开(公告)号：JPH05290544A

公开(公告)日：1993-11-05

申请号：JP9322692

申请日：1992-04-14

Applicant: SONY CORP

Inventor： MEGURO HIROSHI ,  SUGIYAMA MASANOBU

IPC: G02B5/04 ,  G11B23/087 ,  G11B23/30

Abstract: PURPOSE:To provide the prism for a tape cassette constituted to prevent the malfunction of a photodetector by reflection of the light detecting a tape end on a magnetic tape. CONSTITUTION:A photodetecting surface 2 which receives the light 104 from a light emitting part 103 of the photodetector 102 provided in a tape recorder is provided on a prism 1. A rib 3 for light shielding is provided in continuation with the photodetecting surface 2. Many rugged parts 4...4 unified in the longitudinal direction to the aparting direction of a prism forming mold 23 are arranged and provided on one flank of the rib 3, by which a rough surface 4 for light shielding is formed.

公开(公告)号：JPH04325981A

公开(公告)日：1992-11-16

申请号：JP12190191

申请日：1991-04-25

Applicant: SONY CORP

Inventor： MEGURO HIROSHI ,  SUGIYAMA MASANOBU

IPC: G11B23/087

Abstract: PURPOSE:To improve efficiency and accuracy in tightening screws for fixing by making possible a temporary fixation between an upper shell and a lower shell before tightening the screws. CONSTITUTION:In the tape cassette of which both shells are fixed by screwing the screw, which is inserted through a screw inserting part into a boss part for screw tightening under such a state as the screw tightening boss part of one shell is fit in the receiving boss part of the other shell, a rib L, which is in pressurized contact when the screw tightening boss part 2c3 is fit in the receiving boss part 3e3 in one of the shells, is provided.

公开(公告)号：JPH0467487A

公开(公告)日：1992-03-03

申请号：JP18089690

申请日：1990-07-09

Applicant: SONY CORP

Inventor： SUGIYAMA MASANOBU

IPC: G11B23/087 ,  G11B23/113 ,  G11B23/30

Abstract: PURPOSE:To easily form a prism on an upper half by two-color formation by setting a gate position for injecting transparent resin to form the prism on the front face side of the upper half. CONSTITUTION:A metallic mold 22 consists of a cavity lock 23 as a female mold, a fixed core as a male mold and first to third slide cores 25 to 27 and an upper half 3 is molded with injecting opaque resin melted from a gate for forming the upper half into a primary cavity formed in the closed form condition of the cavity lock 23, the fixed core and the first to the third slide cores 25 to 27. Thereafter, before the opaque resin is fixed completely, a secondary cavity is formed while making the first slide core 25 move upward and a prism 16 is formed by injecting the transparent resin melted from a gate for forming the prism G. Thus, the prism 16 is integrated in a condition that it is melt- jointed to the upper half 3 and is formed integrally at one process.