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1. 发明专利

JP2008172895A Stepping motor driving unit 有权
标题翻译：步进电机驱动单元
公开(公告)号：JP2008172895A
公开(公告)日：2008-07-24
申请号：JP2007002484
申请日：2007-01-10
申请人： Mitsubishi Electric Corp , 三菱電機株式会社
发明人： IMASHIRO AKIHIKO , HIGUCHI MINEO , IMAMURA NAOKI , KANEKAWA HIROSHI , KUBOTA TOSHIYA
IPC分类号： H02P8/38
摘要： PROBLEM TO BE SOLVED: To provide a stepping motor driving unit which drives a stepping motor so as to eliminate the adhesion of an adhered portion, when a front part where the power of a power propagation mechanism is propagated is adhered. SOLUTION: The stepping motor driving unit drives the stepping motor, which is connected to a motor shaft to supplies power to the power propagation mechanism including a play during the propagation of power. When the movement of the front part, where the power of the power propagation mechanism is propagated, is restrained to limit the rotation of the motor shaft within a minute angle range, a drive signal is supplied according to a drive pulse having a drive frequency that is same as a natural frequency, obtained from the magnetic spring characteristics of the stepping motor and from the inertia of the power propagation mechanism part from the motor shaft to the play, or to a drive pulse having any drive frequency that is two to four times of the natural frequency, thereby driving the stepping motor. COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：要解决的问题：提供一种步进电机驱动单元，其驱动步进电机以消除粘附部分的粘附，当传播功率传播机构的功率的前部被粘附时。解决方案：步进电动机驱动单元驱动步进电动机，该步进电动机连接到电动机轴，以在电力传播期间向包括游隙的功率传播机构供电。当传播功率传播机构的功率的前部的运动受到限制以将电动机轴的旋转限制在微小的角度范围内时，根据驱动频率来提供驱动信号，该驱动脉冲的驱动频率为与从步进电动机的磁性弹簧特性以及功率传播机构部件的从电动机轴的惯性到播放的固有频率相同，或与驱动频率为2〜4倍的驱动脉冲相同的固有频率，从而驱动步进电机。版权所有（C）2008，JPO＆INPIT

2. 发明专利

JPH04222915A MAGNETIC RECORDING AND REPRODUCING DEVICE 失效
公开(公告)号：JPH04222915A
公开(公告)日：1992-08-12
申请号：JP40635690
申请日：1990-12-26
申请人： MITSUBISHI ELECTRIC CORP
发明人： OKADA KATSUMI , NAKATSU KIMIHIDE , KANEKAWA HIROSHI
IPC分类号： G11B5/53 , G11B5/588
摘要： PURPOSE:To reduce the number of magnetic heads by using a magnetic head for particular reproducing use for a recording in common. CONSTITUTION:A light shielding plate 32 is fixed to the magnetic head 16 for particular reproducing use, and a light transmitter 33 and a light receiver 35 are arranged at both sides thereof to detect a position in the axial direction of magnetic head 16 for particular reproducing use. An output voltage of light receiver 35 is compared with a specific voltage of head position at the recording time generated from a specific power source 41, by a comparator 42 to obtain an output of the difference. A voltage is impressed on a magnetic head driving device 7 so that the output of this difference becomes zero.

3. 发明专利

JPS63238941A MANUFACTURE OF FLUID BEARING 失效
公开(公告)号：JPS63238941A
公开(公告)日：1988-10-05
申请号：JP7513087
申请日：1987-03-27
申请人： MITSUBISHI ELECTRIC CORP
发明人： HONDA KATSUHIKO , KANEKAWA HIROSHI
IPC分类号： B21J3/00 , B21J5/02 , B21K1/05 , F16C17/04 , F16C33/14
摘要： PURPOSE:To facilitate the forming of a fluid bearing of high accurary by forming the spiral groove pattern of a plate type spiral groove bearing by closed type coining. CONSTITUTION:A spiral groove pattern 5 is transferred on a blank stock 1 with compression by the relative movement of an upper punch 2 and lower punch 4 by holding the blank stock 1 on a die 3 and coating a lubricant 7 thereon. At this time, the depth of the spiral groove 5 at the punch 2 side is taken 1-1.5 times the depth necessary for the plate type spiral groove 6. Also, the lubricant mixing wear resistant particles is used for coining. The use of the lubricant mixing silicone particles has better results.

4. 发明专利

JPS63225723A MANUFACTURING DEVICE FOR HYDRODYNAMIC GROOVED BEARING 失效
公开(公告)号：JPS63225723A
公开(公告)日：1988-09-20
申请号：JP5716887
申请日：1987-03-11
申请人： MITSUBISHI ELECTRIC CORP
发明人： HONDA HIROHIKO , FUKUZAWA KAORU , SAKAGUCHI TAKASHI , KANEKAWA HIROSHI
IPC分类号： F16C33/10 , F16C17/02 , F16C33/00 , F16C33/14
摘要： PURPOSE:To reduce abrasion of a ball and a guide pin by bearing a ball on a circular arc of a circular annular groove of the guide pin, relatively rotating the guide pin and a cage and feeding same to form a spiral hydrodynamic groove on the inside diameter portion of a bearing bush. CONSTITUTION:A bearing bush 2 is fixed to a fixture. A hard guide pin 10 is rotatably supported concentrically with a bearing bush 2 by support means. The guide pin 10 is provided with a circular annular groove 11 having a circular surface with a radius equal to or slightly larger than the radius of a hard ball 4. A cage 5 rotatably supported by support means is interposed between the bearing bush 2 and the guide pin 10 concentrically therewith. A plurality of guide holes 5a are disposed radially symmetrically about the shaft center on the cage 5 end balls 4 are rotatably fitted therein. The guide pin 10 and the cage 5 are relatively rotated and fed to the bearing bush 2 by the above manufacturing device to plastic-work a dynamic pressure generating groove 2a.

5. 发明专利

JPH10261254A DISK EXCHANGE DEVICE 失效
公开(公告)号：JPH10261254A
公开(公告)日：1998-09-29
申请号：JP6463097
申请日：1997-03-18
申请人： MITSUBISHI ELECTRIC CORP
发明人： KANEKAWA HIROSHI , TSUJI KAEKO , IWATOMO HIROAKI , OKUDA YASUHIRO
IPC分类号： G11B17/26
摘要： PROBLEM TO BE SOLVED: To perform a disk cartridge gripping operation without providing any special driving sources by causing a latch guiding section to open a hand irrespective of the disk cartridge gripping state of a hand mechanism when an upper base approaches a disk housing. SOLUTION: In this disk cartridge exchange device, when an upper base provided in a disk carrier mechanism approaches a disk housing, hands 811 and 812 are opened by the guiding sections of latches 839 and 840 irrespective of the disk cartridge 2 gripping states of hand mechanisms 806 and 906. Thus, the hand mechanisms 806 and 906 for holding the disk cartridge 2 perform carrying and inserting/ejecting operations for the gripped disk cartridge 2.

6. 发明专利

JPH06223348A MAGNETIC RECORDING AND PLAYBACK APPARATUS 失效
公开(公告)号：JPH06223348A
公开(公告)日：1994-08-12
申请号：JP1249593
申请日：1993-01-28
申请人： MITSUBISHI ELECTRIC CORP
发明人： KANEKAWA HIROSHI , KAWAGOE SHOJI
IPC分类号： G11B5/588
摘要： PURPOSE:To quickly converge detected positional information up to a control position by providing a means wherein the amplification degree of the detected positional information is changed and the detected positional information is fed back to a magnetic-head driving gear. CONSTITUTION:The position of a movable head 16 which has been controlled is decided by a time constant which decides the cutoff frequency of a servo band in a position control loop. The larger a loop gain is, the higher the cutoff frequency of the servo band is, and the cutoff frequency is converged quickly. In this case, a loop gain G1 being recorded is set to a low value by which the cutoff frequency of the servo band can suppress a change, in a square-wave pulse shape, caused by the noise of a transmission system. A loop gain G2 from the start of an operation up to the start of a recording operation is set to a value by which the cutoff frequency of the servo band is several Hz or lower and to a value which gives the cutoff frequency of the servo band which is larger than the G1 and is converged quickly. A time response from the start of the operation up to the start of the recording operation is quick, and, at the same time, it is possible to realize a position control system which can suppresses a change, in a position caused, by the noise of the transmission system.

7. 发明专利

JPH0474308A MAGNETIC HEAD DRIVING DEVICE 失效
公开(公告)号：JPH0474308A
公开(公告)日：1992-03-09
申请号：JP18992690
申请日：1990-07-16
申请人： MITSUBISHI ELECTRIC CORP
发明人： FURUISHI YOSHIO , NAKATSU KIMIHIDE , KANEKAWA HIROSHI
IPC分类号： G11B5/588
摘要： PURPOSE:To secure the high trace accuracy, and also, to obtain the magnetic head driving device which is free from deterioration of a picture quality by filling or applying a thermal conduction medium between a plate spring and a yoke and inserting and holding the plat spring. CONSTITUTION:A thermal conduction medium 33 is applied to both surfaces of outside peripheral parts of plate springs 27, 28 of both ends of a bobbin 30, and the respective plate springs 27, 28 are inserted and held by a first yoke 21 and a second yoke 23, and a second yoke 23 and a third yoke 24. In this case, by reducing a contact resistance between the yokes 21, 23 and 24 for inserting and holding the plate springs 27, 28, and making a thermal resistance Rc small, a heating value Q from a coil flows smoothly, and a temperature rise of the coil 31 is suppressed. In such a way, an excessive temperature rise of the coil itself can be suppressed, and also, a deformation caused by a temperature rise of the coil itself can be suppressed, and also, a deformation caused by a temperature rise can be reduced, and a variation caused by a temperature of a fitting position of a magnetic head can be made small.

8. 发明专利

JPH0378111A MAGNETIC HEAD DRIVING DEVICE 失效
公开(公告)号：JPH0378111A
公开(公告)日：1991-04-03
申请号：JP21521589
申请日：1989-08-21
申请人： MITSUBISHI ELECTRIC CORP
发明人： KANEKAWA HIROSHI
IPC分类号： G11B5/588
摘要： PURPOSE:To obtain a recording track with superior linearity by fixing a cylindrical bobbin supported elastically at a constant position by using a fixing device. CONSTITUTION:Permanent magnets 22, 25, yokes 21, 24 which form a magnetic gap between the permanent magnets, and a magnetic head 16 are mounted on the device. When a current is made flow on shape memory alloy 36 and self-heating occurs in recording, the shape memory alloy 36 is extended in a direction perpendicular to the central axis of the bobbin, and an elastic member 35 is pressed in all directions, which fixes the bobbin 30 at the constant position. Therefore, the magnetic head can be fixed at the constant position without being oscillated in the up-and-down direction even when disturbance, etc., is applied. Thereby, the recording track with superior linearity can be obtained.

9. 发明专利

JPH01307958A MAGNETIC RECORDING AND REPRODUCING DEVICE 失效
公开(公告)号：JPH01307958A
公开(公告)日：1989-12-12
申请号：JP14103388
申请日：1988-06-07
申请人： MITSUBISHI ELECTRIC CORP
发明人： KANEKAWA HIROSHI , HONDA KATSUHIKO
IPC分类号： G11B15/61
摘要： PURPOSE:To enable the high quality recording and reproducing by providing an airflow control member consisting of a prescribed shaped communicating foam material at an inlet part where a magnetic tape begins to wind around the outer circumferential surface of a rotary head assembly. CONSTITUTION:The airflow control member 22 consisting of the communicating foam material having a 1st side 22a extending along the outer circumferential surface 201 of the rotary head assembly at a distance from the outer circumferential surface 201 and a 2nd side 22b extending along the magnetic tape 1 at a distance from the magnetic tape is provided in a space formed between the outer circumferential surface 201 of the rotary head assembly and the magnetic tape 1 at the inlet part 13 where the magnetic tape 1 begins to wind around the rotary head assembly. Consequently, since air flowing through both sides of the airflow control member 22 into the inlet part 13 can be flowed backward through the airflow control member 22, the throttle of the incoming airflow is alleviated, while the floating amt. of the magnetic tape 1 due to the rise of the air pressure in the vicinity of the inlet part is also suppressed in its fluctuation. By this method, the recording and reproducing of a signal can be performed with high quality.

10. 发明专利

JPH01155511A ROTARY HEAD ASSEMBLY IN MAGNETIC RECORDING AND REPRODUCING DEVICE 失效
公开(公告)号：JPH01155511A
公开(公告)日：1989-06-19
申请号：JP31443287
申请日：1987-12-11
申请人： MITSUBISHI ELECTRIC CORP
发明人： KANEKAWA HIROSHI
IPC分类号： G11B5/53 , G11B15/61
摘要： PURPOSE:To stabilize the travel of a magnetic tape by partially adding a taper to the whole periphery of a window for magnetic head projection in a rotary cylinder by causing it to face the side of a fixed cylinder, and making the part of a rear side larger than the part of a front side in the window of the taper part when it is seen in the rotary direction of the rotary cylinder. CONSTITUTION:Since the taper is partially added on the periphery of the window for magnetic head projection 302 with causing it to face the side of the fixed cylinder 2, a force operation on the magnetic tape 1 and facing downward is partially enlarged in the part of the magnetic head 7 much more than the part except for the taper part 306. Since the taper is generated on the whole periphery of the window 302, the magnetic tape 1 is imperious to be brought into contact with any edges of the window 302 and the contact of the magnetic tape 1 and the outer peripheral surface of the rotary cylinder 3 is impervious to occur in the rear side of the window 302. Thus, the magnetic tape can stably be travelled.

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