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    • 2. 发明授权
    • Lumbar support device for chair
    • 腰椅支撑装置
    • US08845025B2
    • 2014-09-30
    • US13634008
    • 2010-09-02
    • Fumihiro KurataIsao Okamoto
    • Fumihiro KurataIsao Okamoto
    • A47C3/00A47C7/46A47C7/48
    • A47C7/462A47C7/48
    • In order to provide a lumbar support apparatus whose position can be adjusted by a simple structure and which can softly support a lumbar vertebra portion of a sitting person, a lumbar support apparatus of a chair according to the present invention is configured by two lumbar support members 10 which are separated into left and right parts, each of the lumbar support members 10 includes a lumbar support portion 11 supporting the lumbar vertebra portion and a stay portion 12 supporting the lumbar support portion, and an end portion of the lumbar support stay portion 12 is rotatably connected and attached to a back frame 2 via a rotation shaft 14, so that the position of the lumbar support portion 11 in the height direction can be adjusted by moving the same such that its distal end side is moved in a circular manner about the rotation shaft 14.
    • 为了提供一种腰椎支撑装置,其位置可以通过简单的结构进行调节,并且能够轻柔地支撑坐着的人的腰椎部分,根据本发明的椅子的腰部支撑装置由两个腰部支撑构件 每个腰部支撑构件10包括支撑腰椎部分的腰部支撑部分11和支撑腰部支撑部分的支撑部分12和腰部支撑支撑部分12的端部部分 通过旋转轴14可旋转地连接并附接到后框架2,使得腰部支撑部11在高度方向上的位置可以通过移动它来调节,使得其远端侧以圆周方式移动 旋转轴14。
    • 3. 发明授权
    • Motor drive unit
    • 电机驱动单元
    • US08803462B2
    • 2014-08-12
    • US13580585
    • 2011-02-24
    • Isao Okamoto
    • Isao Okamoto
    • H02P29/02
    • H02P7/285H02P29/0241
    • A switching element is switched off after having been switched on for only a short time interval called a first predetermined time interval, and a determination is made, based on a mode of a change in a contact point potential (a regeneration voltage) between an electric motor and the switching element when the switching element as switched off, as to whether or not one of the electric motor and the switching element has failed. Next, the switching element is switched on for a time interval called a second predetermined time interval, which is longer than the first predetermined time interval, and a determination is made, based on the magnitude of the contact point potential at that time, as to which one of the electric motor and the switching element has failed. It is thus possible for a failure of the switching element and electric motor to be detected.
    • 开关元件在仅被称为第一预定时间间隔的短时间间隔被接通之后被关断,并且基于电气接通点电位(再生电压)的变化的模式进行确定 电动机和开关元件,当开关元件关断时,电动机和开关元件中的一个是否失效。 接下来,开关元件被接通一段称为第二预定时间间隔的时间间隔,该时间间隔长于第一预定时间间隔,并且基于此时的接触点电位的大小确定为 电动机和开关元件中的哪一个已经失败。 因此,可以检测开关元件和电动机的故障。
    • 4. 发明授权
    • Motor drive circuit
    • 电机驱动电路
    • US08159165B2
    • 2012-04-17
    • US12475168
    • 2009-05-29
    • Isao OkamotoHiroyuki Matsumori
    • Isao OkamotoHiroyuki Matsumori
    • H02H7/08
    • H02H7/0844H02H9/047Y10S320/15
    • A first semiconductor switching element connects to a high side of a motor and includes a diode whose cathode faces the high side. A second semiconductor switching element having a diode resides on a low side of the first semiconductor switching element. A third semiconductor switching element having a diode resides on a low side of the motor. A fourth semiconductor switching element is connected in parallel to the motor and configures a return current circuit that includes a return current element and causes a return current that arises when the first semiconductor switching element turns off to flow through the return current element. A control portion controls on-off states of the first to the fourth semiconductor switching elements and performs return current circuit failure detection based on a first monitor voltage that is an electric potential of a connecting point between the first semiconductor switching element and the motor.
    • 第一半导体开关元件连接到电动机的高侧,并且包括阴极面向高侧的二极管。 具有二极管的第二半导体开关元件位于第一半导体开关元件的低侧。 具有二极管的第三半导体开关元件位于电动机的低侧。 第四半导体开关元件与电动机并联连接,构成包括回流元件的返回电流电路,并且在第一半导体开关元件截止流过返回电流元件时产生返回电流。 控制部分控制第一至第四半导体开关元件的开关状态,并且基于作为第一半导体开关元件和电动机之间的连接点的电位的第一监视电压来执行返回电流电路故障检测。
    • 7. 发明授权
    • Method for measuring parameters of quartz crystal unit and a
non-reactive constant resistance element for carrying out the same
    • 用于测量石英晶体单元的参数的方法和用于执行其的无功恒定电阻元件
    • US3992664A
    • 1976-11-16
    • US638914
    • 1975-12-08
    • Issac KogaIsao OkamotoShigeo Kobayashi
    • Issac KogaIsao OkamotoShigeo Kobayashi
    • G01R29/22G01R23/00
    • G01R29/22
    • The present invention discloses a method of constructing a non-reactive high frequency constant resistance unit to be used for measuring parameters of quartz crystal units described in U.S. Pat. No. 3,832,631 and U.S. Pat. No. 3,872,385. First, a non-reactive frequency of a crystal unit A is determined, a radio-frequency current is supplied to the series circuit A+ B composed of said crystal unit A and a circuit B which is adjustable to non-reactiveness, and the circuit B is adjusted so that the phase of the terminal voltage across said series circuit A+B coincides with the phase of the terminal voltage across the circuit B. Next, said crystal unit A is replaced by an element A, whose construction is similar to the said circuit B, and is adjustable to non-reactiveness, and the element A is adjusted so that the phase of the terminal voltage across said series circuit A+B coincides with the phase of the terminal voltage across the circuit B. Lastly, the construction of A is fixed, whereby said element A is always available as a substitute for A, for checking the non-reactiveness of the circuit B.
    • 本发明公开了一种构成非反应性高频恒定电阻单元的方法,该单元用于测量美国专利No. 美国专利3,832,631和美国专利 3,872,385。 首先,确定晶体单元A的非反应频率,将射频电流提供给由所述晶体单元A构成的串联电路A + B和可调整为非反应性的电路B,并且电路B 被调整为使得串联电路A + B两端的端子电压的相位与电路B两端的端子电压的相位一致。接下来,所述晶体单元A被元件A代替,元件A的结构类似于所述 电路B,并且可调整为非反应性,并且调节元件A,使得跨过串联电路A + B的端子电压的相位与电路B两端的端子电压的相位一致。最后, A固定,由此所述元件A始终可用作A的替代物,用于检查电路B的非反应性。