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1. 发明专利

JP2000187910A GUIDE ROLLER 失效
公开(公告)号：JP2000187910A
公开(公告)日：2000-07-04
申请号：JP36633598
申请日：1998-12-24
申请人： HITACHI LTD
发明人： YAMASHITA YOSHIHARU , UEDA MASASHI
IPC分类号： G11B15/60
摘要： PROBLEM TO BE SOLVED: To easily and inexpensively prevent tape edges from damaged by providing a structure in which a projecting having a diameter nearly equal to or slightly smaller than that of a roller diameter on the roller side of an upper or a lower flange. SOLUTION: A tape 1 winds around a roller 4 to the extent of a prescribed angle and regulates the height of the tape 1 by supporting it on the back of an upper flange 2. The roller 4 is slidable in the upper and lower directions, so a clearance (c) appears between the roller 4 and the lower surface of the upper flange 2. A projecting part 2a is set so as to have a diameter nearly equal to or a little smaller than the diameter of the roller 4; consequently in the case that the tape 1 comes to get into the clearance (c) owing to bending of an end part of the tape 1 of the side submitting to regulation of height according to the regulation by the upper flange 2, from a condition of usual running without coming into contact with the projecting part 2a, the projecting part 2a of the upper flange 2 plays a role of a support in the direction of thickness and prevents intrusion of the tape.

2. 发明专利

JP2000048435A MAGNETIC RECORDING AND REPRODUCING DEVICE 失效
公开(公告)号：JP2000048435A
公开(公告)日：2000-02-18
申请号：JP21683598
申请日：1998-07-31
申请人： HITACHI LTD
发明人： TAKEDA HIDEKAZU , ABE FUKUOKU , UEDA MASASHI , MARUYAMA AKIRA , KODAMA KAZUYUKI
IPC分类号： G11B15/61
摘要： PROBLEM TO BE SOLVED: To decrease the number of tape guides down to a required min. by allowing both of a tape traveling surface between a supply reel and a drum advance side tape guide and a tape traveling surface between a take-up side tape guide and a take-up reel to form twisted curvilinear surfaces. SOLUTION: The tape traveling route from the supply reel 2 to a tension pin 6 has the state twisted at a prescribed angle with a tape center line. The center height of the tape 4 delivered from the supply reel 2 and the height of the tape entering the tension pin 6, when the winding diameters of the tapes wound on the supply reel 2 and the take-up reel 3 are approximately equal, are set at approximately the same height on the basis of a chassis 5. The tape traveling route from the tension pin 6 to the advance side tape guide 7 has the state of twisting the tension pin 6 at the prescribed angle with the tape center line. At this time, the tape traveling route on the drum 8 advance side is approximately determined by the posture (angle of inclination and inclination direction) of the tension pin 6.

3. 发明专利

JPH0714250A RECORDING/REPRODUCING APPARATUS 失效
公开(公告)号：JPH0714250A
公开(公告)日：1995-01-17
申请号：JP15482193
申请日：1993-06-25
申请人： HITACHI LTD , HITACHI VIDEO & INF SYST
发明人： FUJIMORI SHINYA , NARITA YOSHIO , OWADA SOICHIRO , HOSHI TERUO , TSUBOTA SHINYA , KODAMA KAZUYUKI , UEDA MASASHI , NAGAI KIYUUICHIROU
IPC分类号： G11B15/00 , G11B15/02 , G11B15/10 , G11B15/18 , G11B15/665
摘要： PURPOSE:To simplify a mode switch and reduce the size of the mode switch by a method wherein the position of one mode is detected by the mode switch and an each mode is set by driving a driving source for a required time from the first detected position. CONSTITUTION:When loading is started, a cam gear 10 is driven to rotate by a loading motor 5. With this rotation, a brush 103 touching the terminal 102 of a mode switch 9 is turned with the cam gear 10 and is separated from the terminal 102. The time required for the cam gear 10 to rotate from a mode before the loading is started to respective modes is measured beforehand and stored in a microcomputer 104. When an apparatus receives, for instance, a signal giving instruction to enter a recording mode, the microcomputer 104 receives the signal and a driving IC 105 drives the loading motor 5 for the required time stored beforehand. With this operation, the cam gear 10 rotates a required angle and the apparatus is put into a recording mode state.

4. 发明专利

JPH05334767A 失效
公开(公告)号：JPH05334767A
公开(公告)日：1993-12-17
申请号：JP14243592
申请日：1992-06-03
申请人： HITACHI LTD
发明人： KODAMA KAZUYUKI , UEDA MASASHI , IWAKURA MASAO , IZUMI KATSUHIKO
IPC分类号： G11B15/60 , G11B15/61
摘要： PURPOSE:To provide a tape guiding device applicable to a shaft rotational type cylinder and being used as the grounding member of a cylinder as well in relation to the cassette loading and tape pulling-out mechanism of a magnetic recording and reproducing device. CONSTITUTION:In the tape guiding device, a guiding member A19a made of conductive material is attached to a fixed chassis 1 and the guiding member A19a abuts to the rotating shaft of the cylinder 9 and the whole upper part is applied to the shaft rotational type cylinder. At the time of loading a cassette 3, an exposed magnetic tape 8 is reeled and returned to a formal position by the guiding member B19b. Also, since the fixed chassis 1 is electrically in contact with the rotating shaft of the cylinder 9, the cylinder is grounded.

5. 发明专利

JPH05114282A MAGNETIC RECORDING/REPRODUCING APPARATUS 失效
公开(公告)号：JPH05114282A
公开(公告)日：1993-05-07
申请号：JP27524491
申请日：1991-10-23
申请人： HITACHI LTD
发明人： IWAKURA MASAO , IZUMI KATSUHIKO , UEDA MASASHI , KODAMA KAZUYUKI
IPC分类号： G11B15/61 , G11B33/12
摘要： PURPOSE:To make small and thin a mechanism of a magnetic recording/ reproducing apparatus. CONSTITUTION:A hole is bored in a fixed chassis on which a cylinder and a capstan motor are mounted. The fixed chassis is erected at a line passing the hole. A motor part and a substrate part are arranged to pass through the part of the hole. Moreover, a notch or an opening is formed in the fixed chassis, and a cassette detecting switch and a brake mechanism member are disposed at the same height as the fixed chassis. Accordingly, parts can be mounted with high density and the whole mechanism can be made compact.

6. 发明专利

JPS63113842A MODE OPERATING DEVICE FOR MAGNETIC RECORDING AND REPRODUCING DEVICE 失效
公开(公告)号：JPS63113842A
公开(公告)日：1988-05-18
申请号：JP25824986
申请日：1986-10-31
申请人： HITACHI LTD
发明人： YOKOO SHOZO , ICHIKAWA TAKASHI , UEDA MASASHI
IPC分类号： G11B15/665 , G11B15/10
摘要： PURPOSE:To evade the superposition of a load applied to a cam, and to adopt a miniature motor for a driving source by operating plural members to be operated, which are operated by an annular cam, by a timing whose phase is shifted. CONSTITUTION:In a cam par provided on the inside periphery of an annular cam 2, various levers to be operated 5-10 such as pinch roller arm operating lever 5, an operating lever 7 for a position control of a main brake and a take-up gear, etc. are placed. Also, a part of a cam slanting face provided on the annular cam 2, or the member to be operated is placed by shifting a driving position, so that driving timings of these plural operating levers 5-10 are different. Accordingly, the member to be operated is driven by the timing whose phase is shifted, therefore, a load applied to the cam 2 is not superposed, and a miniature and low torque motor can be adopted for a motor 3 of a driving source.

7. 发明专利

JPS576466A RECORD-SIZE DETECTING DEVICE 失效
公开(公告)号：JPS576466A
公开(公告)日：1982-01-13
申请号：JP7903380
申请日：1980-06-13
申请人： HITACHI LTD
发明人： WATANABE MASAYOSHI , HASHIMOTO YOUICHI , ISHIGAKI YASUHIRO , NAKAMURA TSUTOMU , UEDA MASASHI
IPC分类号： G11B19/12
摘要： PURPOSE:To supply a constant quantity of light to a photodetecting element and also to place the photodetecting element to an optional position, by installing a prism to a chassis instead of a turntable, and also providing a passive reflector. CONSTITUTION:Holes 7, 8 are provided a little inside of records of 30cm and 17cm in disk diameters on a turntable 3, and a prism 4 and a passive reflector 5 are installed onto a chassis 9. When a 30cm-disk is placed, both the holes 7, 8 are closed up, and no output is generated to a photodetecting element 6. In case of a 17cm- disk, the hole 7 is opened, a light beam of a light source 1 passes through a part of incidence 15 and the prism 4, reaches the photodetecting element 6, and one pulse is outputted. In case when there is no record on the table 3, the holes 7, 8 are opened, and two pulses are outputted through the passive reflector 5. In this way, size is detected by the number of pulses in a prescribed time. Also, a constant quantity of light is supplied to the photodetecting element 6 since it is not influenced by vibration of the table, and is possible to place an optional position.

8. 发明专利

JPH10228691A OPERATION TRANSMISSION MECHANISM ANT ITS PROCESSING METHOD 失效
公开(公告)号：JPH10228691A
公开(公告)日：1998-08-25
申请号：JP2872997
申请日：1997-02-13
申请人： HITACHI LTD
发明人： IKEDA HIDEHIRO , YAMASHITA YOSHIHARU , OYAMA KAZUTO , UEDA MASASHI
IPC分类号： G11B15/26
摘要： PROBLEM TO BE SOLVED: To reduce vibration and noise of an rotary shaft and to prevent the positioning accuracy of the rotary shaft from being degraded by pressing down the shaft end of the opposite side of the shaft end erected in the base of the rotary shaft of a mechanism transmitting an operation by a gear revolving around the rotary shaft erected in the base with a leaf spring or an elastic body. SOLUTION: The upper end of the rotary shaft 1 of a gear 2 to be rotatingly driven by a belt 4 is pressed down with a leaf spring 3. The shaft end of the leaf spring 3 side of the rotary shaft 1 is made to be a tapered shape and a tapered hole is provided at a position of the leaf spring 3 where is to be brought into contact with the rotary shaft 1 and the opening diameter of the tapered hole of the spring 3 is set to the the middle of the maximum diameter and the minimum diameter of the tapered shape of the shaft end. Thus, the rotary shaft 1 is held without backlash and vibration and noise of the shaft 1 due to the fluctuation of tensile strength of the belt 4 are prevented from occurring and also the positioning accuracy of the shaft 1 is enhanced by pressing down the shaft 1 of the gear 2 with the leaf spring 3.

9. 发明专利

JP2567908B2 失效
公开(公告)号：JP2567908B2
公开(公告)日：1996-12-25
申请号：JP9931088
申请日：1988-04-23
申请人： HITACHI LTD
发明人： FUSE KENJI , MASUDA NORIAKI , ICHIKAWA TAKASHI , UEDA MASASHI , KODAMA KAZUYUKI
IPC分类号： G11B15/61 , G11B15/665

10. 发明专利

JPH08306103A TAPE LOADING DRIVE DEVICE FOR MAGNETIC RECORDING AND REPRODUCING DEVICE 失效
公开(公告)号：JPH08306103A
公开(公告)日：1996-11-22
申请号：JP10933595
申请日：1995-05-08
申请人： HITACHI LTD
发明人： UEDA MASASHI , KODAMA KAZUYUKI , ENDO TAKESHI
IPC分类号： G11B15/665
摘要： PURPOSE: To suppress a displacement amt. of a rotary shaft and to prevent friction and noise and deterioration of efficiency by holding one end of the rotary shaft in the whole radial direction. CONSTITUTION: An output of a motor is decelerated through a worm 4, a worm wheel 2b, a worm 2c, a worm wheel 5, a spur gear 6 and a spur gear 7, and is transmitted to a magnetic tape moving mechanism. In a holding structure of the rotary shaft 2a in the radial direction, one end of the rotary shaft 2a is held by 1a, 1b, 1c and 1d and in the whole radial direction, and holding positions of holding fulcrums 1a and 1b are deviated in some measure in the direction of the rotary shaft, thus eliminating dimensional backlash in the direction of A at the time of operation after fitting the rotary shaft 2a. In a holding structure of this rotary shaft 2a in the thrust direction, both ends of the rotary shaft 2a are borne by 1h and 1i. Then, the other end is held by 1e, 1f and 1g and in the radial direction other than the A direction, and is free in only one direction of the A direction (in the direction of meshing with the worm on the upstream side). Consequently, the still one end of the rotary shaft 2a can be set up in the direction from A.

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