公开(公告)号：US5034704A

公开(公告)日：1991-07-23

申请号：US529357

申请日：1990-05-29

Applicant: Hidehiro Tomioka ,  Masakatsu Hosoya ,  Kenji Ueda

Inventor： Hidehiro Tomioka ,  Masakatsu Hosoya ,  Kenji Ueda

IPC: G01V3/10 ,  H03K17/95

CPC classification number: G01V3/102 ,  H03K17/9505 ,  H03K17/954 ,  H03K2217/952

Abstract: A high frequency oscillation type proximity switch, comprising: an oscillation circuit having a first resonant frequency; a tank circuit connected in a positive feedback path of the oscillation circuit and including an LC resonant circuit having a second resonant frequency slightly different from the first resonant frequency; and a comparator circuit which discriminates the amplitude of an oscillation output of the oscillating circuit at a predetermined threshold level; the comparator producing a detection output signal when a nonmagnetic metallic object is brought to a certain proximity of a coil included in the LC resonant circuit and a level of the oscillation has thereby changed by a certain amount as a result of a change in the susceptance of the coil. Since the approach of a magnetic object increases the loss of the coil whereas the approach of a nonmagnetic metallic object increases the susceptance of the coil, it is possible to detect magnetic objects alone, nonmagnetic metallic objects alone, or both magnetic objects and nonmagnetic metallic objects alike by appropriately selecting the resonant frequencies of the oscillation circuit, and the tank circuit and the threshold level of the comparator circuit.

公开(公告)号：US5886977A

公开(公告)日：1999-03-23

申请号：US903527

申请日：1997-07-30

Applicant: Toshiro Ota ,  Masakatsu Hosoya ,  Takashi Yamazaki

Inventor： Toshiro Ota ,  Masakatsu Hosoya ,  Takashi Yamazaki

IPC: G11B7/085 ,  G11B17/04 ,  G11B21/04 ,  G11B21/02

CPC classification number: G11B17/056 ,  G11B21/046 ,  G11B7/08582 ,  G11B7/085

Abstract: Coil springs 96 and 97 are incorporated in a driving-side transmission mechanism 61 so as to absorb backlashes between a rack 55 and a drive gear 59a. Since the respective backlashes between the drive gear 59a and the rack 55 are absorbed by way of the coil springs 96 and 97, phase matching at the sole driving-side transmission mechanism 61 is required as phase matching work of toothed portions of gears during assembly, thereby simplifying the assembling task and shortening the amount of assembling hours. Additionally, since a coil spring is not included in the rack 55, the rack can be designed to be small-sized in its width direction, thereby minimizing the moment of a force about the meshed engagement point, acting on an optical head carriage 53, and reducing transfer loss in the head.

Abstract translation: 线圈弹簧96和97结合在驱动侧传动机构61中以吸收齿条55与驱动齿轮59a之间的间隙。 由于驱动齿轮59a和齿条55之间的相应的间隙被螺旋弹簧96和97吸收，所以在组装期间需要在底部驱动侧传动机构61处的相位匹配作为齿轮齿轮的相位匹配工作， 从而简化组装任务，缩短组装时间。 此外，由于螺旋弹簧不包括在齿条55中，所以齿条可以被设计成在其宽度方向上的尺寸小，从而最小化作用在光学头滑架53上的啮合接合点周围的力的力矩， 并减少头部的转移损失。

公开(公告)号：US5777978A

公开(公告)日：1998-07-07

申请号：US432173

申请日：1995-06-26

Applicant: Toshiro Ota ,  Masakatsu Hosoya ,  Takashi Yamazaki

Inventor： Toshiro Ota ,  Masakatsu Hosoya ,  Takashi Yamazaki

IPC: G11B7/085 ,  G11B17/04 ,  G11B21/04 ,  G11B21/02

CPC classification number: G11B17/056 ,  G11B21/046 ,  G11B7/08582 ,  G11B7/085

Abstract: Coil springs 96 and 97 are incorporated in a driving-side transmission mechanism 61 so as to absorb backlashes between a rack 55 and a drive gear 59a. Since the respective backlashes between the drive gear 59a and the rack 55 are absorbed by way of the coil springs 96 and 97, merely phase matching at the sole driving-side transmission mechanism 61 is required as phase matching work of toothed portions of gears during assembly, thereby simplifying the assembling task and shortening assembly time. Additionally, since a coil spring is not included in the rack 55, the rack can be designed to be small-sized in its width direction, thereby minimizing the moment of a force about the meshed engagement point, acting on an optical head carriage 53, and reducing transfer loss in the head.

Abstract translation: PCT No.PCT / JP94 / 01510 Sec。 371日期：1995年6月26日 102（e）日期1995年6月26日PCT 1994年9月12日PCT PCT。 公开号WO95 / 08172 日期1995年3月23日线弹簧96和97并入驱动侧传动机构61中，以吸收齿条55与驱动齿轮59a之间的间隙。 由于驱动齿轮59a和齿条55之间的相应的间隙被螺旋弹簧96和97吸收，因此仅需要在底部驱动侧传动机构61处的相位匹配作为在组装期间齿轮的齿形部分的相位匹配工作 从而简化组装任务，缩短装配时间。 此外，由于螺旋弹簧不包括在齿条55中，所以齿条可以被设计成在其宽度方向上的尺寸小，从而最小化作用在光学头滑架53上的啮合接合点周围的力的力矩， 并减少头部的转移损失。

公开(公告)号：US4831660A

公开(公告)日：1989-05-16

申请号：US117805

申请日：1987-11-06

Applicant: Noriyuki Koga ,  Masakatsu Hosoya

Inventor： Noriyuki Koga ,  Masakatsu Hosoya

IPC: G11B15/10 ,  G11B15/29 ,  G11B15/44 ,  G11B25/06

CPC classification number: G11B15/29 ,  G11B15/442 ,  G11B25/063

Abstract: In a mode-change mechanism for a tape recorder, a driving bar is mounted for movement between a record/playback mode position and a stop mode position, a partially toothless gear has a cam thereon engageable by a cam follower on the driving bar for moving the latter between its mode selecting positions in response to turning of the partially toothless gear between immobile positions thereof in which opposed first and second toothless portions on the outer periphery respectively face a driving gear for intermittently rotating the partially toothless gear, a lock lever is selectively engageable with one of a pair of stop elements on the partially toothless gear for halting rotation of the latter in a respective one of the immobile positions thereof, and a spring urges the driving bar toward one of its mode selecting positions, with the cam, toothless portions and stop elements on the partially toothless gear being angularly positioned in respect to each other so that, when the lock lever is disengaged from one of the stop elements, the force of the spring on the driving bar is effective, through the action of the cam follower on the cam, to initiate turning of the partially toothless gear from its prior immobile position for meshing engagement with the driving gear.

Abstract translation: 在磁带录音机的模式切换机构中，安装驱动杆以在记录/播放模式位置与停止模式位置之间移动，部分无齿齿轮具有凸轮，所述凸轮可由驱动杆上的凸轮从动件接合，用于移动 后者在其不可移动位置之间的部分无齿齿轮的转动的模式选择位置之间，其中外周上相对的第一和第二无齿部分别面对用于间歇地旋转部分无齿齿轮的驱动齿轮，锁定杆是选择性地 可与部分无齿齿轮上的一对止动元件中的一个啮合，用于在其不可移动位置中的相应一个中停止后轮的旋转，并且弹簧将驱动杆推向其模式选择位置之一，凸轮，无齿 部分无齿齿轮上的部分和止动元件相对于彼此成角度地定位，使得当锁定杆时 与止动元件中的一个分离，弹簧在驱动杆上的力通过凸轮从动件在凸轮上的作用是有效的，以启动部分无齿齿轮从其先前的不动位置转动，以与 驾驶齿轮