公开(公告)号：US5673247A

公开(公告)日：1997-09-30

申请号：US758010

申请日：1996-11-27

申请人： Yoshihiro Sekimoto ,  Yasuo Nakata ,  Nobuo Ogata ,  Tomoyuki Miyake

发明人： Yoshihiro Sekimoto ,  Yasuo Nakata ,  Nobuo Ogata ,  Tomoyuki Miyake

IPC分类号： G11B7/00 ,  G11B7/0037 ,  G11B7/135 ,  G11B11/105

CPC分类号： G11B7/1374 ,  G11B11/10543 ,  G11B7/1365 ,  G11B7/1369 ,  G11B7/139 ,  G11B2007/0006

摘要： An optical pickup for irradiating a first recording medium and a second recording medium with light, at least one of the substrate thickness and the refractive index of the first recording medium being different from that of the second recording medium, where the optical pickup includes: a light source for emitting the light; a polarized beam splitter for receiving the light and for transmitting at least a portion of the light while reflecting the remaining portion of the light depending on the polarization direction of the light; a first objective lens for focusing the portion of the light reflected by the polarized beam splitter onto the first recording medium; and a second objective lens for focusing the portion of the light transmitted through the polarized beam splitter onto the second recording medium.

摘要翻译： 一种用于用光照射第一记录介质和第二记录介质的光学拾取器，所述第一记录介质的基板厚度和折射率中的至少一个与所述第二记录介质的折射率不同，其中所述光学拾取器包括： 用于发光的光源; 偏振分束器，用于接收光并用于透射至少一部分光，同时根据光的偏振方向反射光的剩余部分; 用于将由偏振分束器反射的光的一部分聚焦到第一记录介质上的第一物镜; 以及用于将透射通过偏振分束器的光的一部分聚焦到第二记录介质上的第二物镜。

公开(公告)号：US5446721A

公开(公告)日：1995-08-29

申请号：US138014

申请日：1993-10-19

申请人： Yoshihiro Sekimoto ,  Toshiharu Inui ,  Yasuo Nakata ,  Nobuo Ogata ,  Hideaki Sato

发明人： Yoshihiro Sekimoto ,  Toshiharu Inui ,  Yasuo Nakata ,  Nobuo Ogata ,  Hideaki Sato

IPC分类号： G11B7/09 ,  G02B7/02 ,  G11B7/00

CPC分类号： G11B7/0932

摘要： In an objective lens driving apparatus used in an optical information recording and reproducing apparatus or the like, a vibration is suppressed and a resonance peak on transfer function is suppressed when movable portions are moved in focusing and tracking directions and when these portions are turned around focusing and tracking directions. An elastic body which supports the movable portions movably in two directions, i.e., focusing direction and tracking direction to a fixed portion includes a bent portion in an intermediate portion between the side of movable portion and the side of fixed portion. A damper member is adhered to bridge a gap between a branched arm portion branching from a linear portion extending from the side of movable portion, and a fixed portion. The bent portion couples two linear portions and which are not on the same line.

摘要翻译： 在用于光信息记录和再现装置等的物镜驱动装置中，当可移动部分在聚焦和跟踪方向上移动时，并且当这些部分转向聚焦时，抑制振动并抑制传递函数上的共振峰值 和跟踪方向。 支撑可移动部分的弹性体在朝向固定部分的聚焦方向和跟踪方向的两个方向上可移动地包括在可动部分的侧面和固定部分侧之间的中间部分中的弯曲部分。 阻尼构件被粘接以桥接从从可动部分的侧面延伸的直线部分分支的分支臂部分与固定部分之间的间隙。 弯曲部分连接两个线性部分，并且不在同一条线上。

公开(公告)号：US07623419B2

公开(公告)日：2009-11-24

申请号：US10768623

申请日：2004-01-30

申请人： Yasuo Nakata

发明人： Yasuo Nakata

IPC分类号： G11B7/085

CPC分类号： G11B7/00375 ,  G11B7/002 ,  G11B7/08517 ,  G11B7/0946

摘要： An off-track duty measurement unit measures off-track detection sensitivity on the basis of an off-track signal, and track cross cycle information that is obtained from a tracking error signal measured by a track cross cycle measurement unit, whereby off-track detection sensitivity can be measured more accurately. Further, an off-track detection sensitivity controller changes the detection sensitivity of an off-track signal detector according to the obtained off-track detection sensitivity, whereby the off-track sensitivity can be kept constant for various kinds of discs, and accordingly, stabilities of off-track detection, track pull-in judgement, and track jumping can be secured.

摘要翻译： 离轨占空比测量单元基于偏离轨道信号来测量偏离轨迹检测灵敏度，并且跟踪由轨道交叉循环测量单元测量的跟踪误差信号获得的交叉循环信息，由此进行离轨检测 灵敏度可以更准确地测量。 此外，偏离磁道检测灵敏度控制器根据获得的偏离磁道检测灵敏度改变偏离磁道信号检测器的检测灵敏度，从而可以使各种光盘的偏离磁道灵敏度保持不变，因此，稳定性 可以确保偏离轨迹检测，轨迹拉入判断和轨道跳跃。

公开(公告)号：US06934227B2

公开(公告)日：2005-08-23

申请号：US10231160

申请日：2002-08-30

申请人： Yasuo Nakata ,  Masanori Harui

发明人： Yasuo Nakata ,  Masanori Harui

IPC分类号： G11B7/09 ,  G11B7/00

CPC分类号： G11B7/0946 ,  G11B7/0908

摘要： To increase the vibration resistance of an optical disk device with respect to vibrations in the focus direction. More specifically, an optical disk device is provided with a multiplication means for generating a focus vibration component FC from the focus error signal FE, a multiplication means for generating a tracking vibration component TC from the tracking error signal TE, an adder for adding the focus vibration components FC and TC, and a low-pass filter for extracting the vibration component VC from the added results. Thus, the vibration component VC is extracted considering not only vibrations in the tracking direction but also vibrations in the focus direction, so that vibrations acting on the device can be more accurately detected, and vibration resistance is increased.

摘要翻译： 相对于聚焦方向上的振动增加光盘装置的抗振性。 更具体地说，光盘装置设置有用于从聚焦误差信号FE产生聚焦振动分量FC的乘法装置，用于从跟踪误差信号TE产生跟踪振动分量TC的乘法装置，用于将焦点相加的加法器 振动分量FC和TC，以及用于从附加结果中提取振动分量VC的低通滤波器。 因此，不仅考虑跟踪方向上的振动，而且考虑聚焦方向的振动，提取振动分量VC，从而可以更精确地检测作用在装置上的振动，并且提高抗振性。

公开(公告)号：US06502896B1

公开(公告)日：2003-01-07

申请号：US09653723

申请日：2000-09-01

申请人： Yasuo Nakata ,  Yoshitaka Matsubara ,  Kenji Ikeda ,  Kenzo Koga ,  Teruo Kunizawa ,  Tomoaki Miyake

发明人： Yasuo Nakata ,  Yoshitaka Matsubara ,  Kenji Ikeda ,  Kenzo Koga ,  Teruo Kunizawa ,  Tomoaki Miyake

IPC分类号： B60R2700

CPC分类号： B60J5/0487 ,  E02F9/163 ,  Y10T16/531 ,  Y10T16/554 ,  Y10T16/557 ,  Y10T16/558 ,  Y10T16/5595

摘要： A backhoe (1) includes an upper structure (3) supported by a traveling device (2) to be rotatable about a vertical swivel axis (X). The upper structure (3) carries an excavator (4) and a cab (12) and has a rear edge (3A) formed arcuate about the swivel axis (X) in plan view. The cab (12) defines an opening (31) with a door (32) attached through hinges (34). The door (32) is pivotable about a vertical open/close axis (Y) of hinges (34). The hinges (34) are arranged on a rear edge opening (31). Each hinge (34) includes a pair of hinges (34A and 34B) which are bent to place the axis (Y) forwardly of the rear end of door (32). Consequently, when the door (32) is set to a fully open position, the free end of door (32) is displaced to a position forwardly of the rear edge (3A) of upper structure (3).

摘要翻译： 反铲（1）包括由行走装置（2）支撑的上部结构（3），以可围绕垂直旋转轴线（X）旋转。 上部结构（3）承载挖掘机（4）和驾驶室（12），并且在俯视图中具有绕旋转轴线（X）弓形地形成的后边缘（3A）。 驾驶室（12）限定了具有通过铰链（34）连接的门（32）的开口（31）。 门（32）可围绕铰链（34）的垂直打开/关闭轴线（Y）枢转。 铰链（34）布置在后边缘开口（31）上。 每个铰链（34）包括一对铰链（34A和34B），其被弯曲以将轴线（Y）放置在门（32）的后端的前方。 因此，当门（32）设定为完全打开位置时，门（32）的自由端位移到上部结构（3）的后边缘（3A）的前方位置。

公开(公告)号：US4609065A

公开(公告)日：1986-09-02

申请号：US691772

申请日：1985-01-16

申请人： Hajime Shikiya ,  Hiroyuki Miki ,  Yasuo Nakata ,  Kazuo Hirata ,  Seiichi Ishiizumi

发明人： Hajime Shikiya ,  Hiroyuki Miki ,  Yasuo Nakata ,  Kazuo Hirata ,  Seiichi Ishiizumi

IPC分类号： B60K17/16 ,  B60K17/30 ,  F16H48/08

CPC分类号： B60K17/303 ,  Y10T74/2188

摘要： A wheel drive structure for an agricultural tractor comprising a drive case housing a differential mechanism and reduction mechanisms to transmit power from said differential mechanism to wheels. The drive case comprises first and second case portions and said first case portion is made of a structural steel pipe.

摘要翻译： 一种用于农用拖拉机的轮驱动结构，包括容纳差速机构的驱动壳体和用于将动力从所述差速机构传递到车轮的减速机构。 驱动箱包括第一和第二壳体部分，并且所述第一壳体部分由结构钢管制成。

公开(公告)号：US5490574A

公开(公告)日：1996-02-13

申请号：US319830

申请日：1994-10-07

申请人： Seiichi Ishiizumi ,  Yasuo Nakata ,  Kazuo Hirata ,  Akinori Nakashima

发明人： Seiichi Ishiizumi ,  Yasuo Nakata ,  Kazuo Hirata ,  Akinori Nakashima

IPC分类号： B60K11/04 ,  B60K11/08 ,  F01P11/12

CPC分类号： F01P11/12 ,  B60K11/08

摘要： A hood for enclosing a radiator and an engine has a hood grille formed in a front surface of the hood. The hood grille includes a front wall, and right and left side walls extending from opposite sides of the front wall. The front wall defines intake openings for drawing in air for the radiator. The right and left side walls include bent portions bent substantially at right angles to the front wall. Opposite end regions thereof are secured to the right and left side walls by fixing devices. Hood grille netting extends over an entire area of the intake openings and covers at least parts of the right and left side walls. The opposite end regions of the hood grille netting are bent to correspond to the bent portions. The hood grille netting is secured to the hood grille by bolts and spacers to define spaces between the hood grille netting and the right and left side walls. These spaces communicate with the intake openings.

摘要翻译： 用于封装散热器和发动机的罩具有形成在罩的前表面中的罩格栅。 罩格包括前壁，从前壁的相对侧延伸的左右侧壁。 前壁限定用于吸入散热器的进气口。 右侧壁和左侧壁包括基本上与前壁成直角弯曲的弯曲部分。 其相对的端部区域通过固定装置固定在左右侧壁上。 敞篷格栅网在进气口的整个区域上延伸，并且覆盖左右侧壁的至少一部分。 罩格栅网的相对端部区域被弯曲以对应于弯曲部分。 发动机罩格栅通过螺栓和间隔件固定到发动机罩格栅，以限定发动机罩格栅与左右侧壁之间的空间。 这些空间与进气口连通。

公开(公告)号：US07894312B2

公开(公告)日：2011-02-22

申请号：US11662927

申请日：2006-04-25

申请人： Yasuo Nakata

发明人： Yasuo Nakata

IPC分类号： G11B7/00

CPC分类号： G11B20/10009 ,  G11B20/10027 ,  G11B20/10481 ,  H03F3/181 ,  H03F2200/03 ,  H03F2200/78 ,  H03G3/30

摘要： In a signal reproducing device, for securing the stability in the steady state while enhancing the response of automatic gain control, a variable gain amplifier 109 adjusts the amplitude of a reproduction signal outputted from a head amplifier 108. A gain control section 112 increases/decreases the gain in the variable gain amplifier 109 by a predetermined change amount according to the large-small relationship of the comparison result outputted from a comparator 111. The gain change amount control circuit 113 controls the change amount of the gain in the gain control section 112 according to the frequency of inversion of the large-small relationship of the comparison result outputted from the comparator 111.

摘要翻译： 在信号再现装置中，为了在增强自动增益控制的响应的同时确保稳定状态，可变增益放大器109调整从头放大器108输出的再现信号的幅度。增益控制部分112增加/减小 根据从比较器111输出的比较结果的大小关系，可变增益放大器109的增益达到预定的变化量。增益变化量控制电路113控制增益控制部分112中的增益变化量 根据比较器111输出的比较结果的大小关系的反转频率。

公开(公告)号：US20090116348A1

公开(公告)日：2009-05-07

申请号：US11916390

申请日：2006-05-31

申请人： Yasuo Nakata

发明人： Yasuo Nakata

IPC分类号： G11B7/09 ,  G11B7/00

CPC分类号： G11B7/0946

摘要： In a state where vibration is constantly detected, a protection function by a vibration detection circuit loses effectiveness, and thereby there may possibly arise a malfunction of an off-track detection circuit due to a pseudo-generated off-track signal. An off-track detection circuit which is capable of preventing malfunction due to a pseudo-generated off-track signal and of maintaining stable reproduction even when being under vibration, is provided by constructing the circuit not to judge as off-track when a reproduction synchronization signal is detected.

摘要翻译： 在不断地检测到振动的状态下，振动检测电路的保护功能失去有效性，从而可能由于伪产生的偏离轨迹信号而导致偏离磁道检测电路的故障。 提供一种离轨检测电路，其能够防止由伪伪产生的越野信号引起的故障，并且即使在振动时也能保持稳定的再现，通过构造不被判断为再现同步的偏离轨迹的电路来提供 检测到信号。

公开(公告)号：US20070053270A1

公开(公告)日：2007-03-08

申请号：US11495907

申请日：2006-07-28

申请人： Tetsuo Ueyama ,  Osamu Miyazaki ,  Yukio Watanabe ,  Yasuo Nakata ,  Tomio Mashiyama

发明人： Tetsuo Ueyama ,  Osamu Miyazaki ,  Yukio Watanabe ,  Yasuo Nakata ,  Tomio Mashiyama

IPC分类号： G11B7/135

CPC分类号： G11B7/1353 ,  G11B7/0903

摘要： An optical pickup device has a semiconductor laser emitting light which is in turn branched via a diffraction grating into at least three beams of light including a main beam and two sub beams which are in turn condensed via an objective lens on an optical disk at a guide groove and reflected by the optical disk to provide three reflections of light which are in turn received by detectors, each divided into two regions, respectively, to generate a tracking error signal. The diffraction grating is divided into three regions including a first region, a second region and a third region located intermediate therebetween, each having a periodical structure out of phase, the periodical structure having grating grooves in a direction determined depending on the phase of the second region to incline relative to a direction perpendicular to the guide groove of the optical disk.

摘要翻译： 光学拾取装置具有发射光的半导体激光器，该半导体激光器又通过衍射光栅分支成至少三束光束，所述至少三束光包括主光束和两个子光束，所述至少三个光束又通过物镜在光盘上以引导 凹槽并由光盘反射以提供三次反射的光，这些反射又被检测器接收，每个被分成两个区域以产生跟踪误差信号。 衍射光栅分为三个区域，包括第一区域，第二区域和位于其间的第三区域，每个区域具有异相的周期性结构，该周期结构具有根据第二区域的相位确定的方向的光栅槽 区域相对于垂直于光盘的引导槽的方向倾斜。