摘要:
Disclosed is an image pickup device, by which cut resistance at the time of cutting a wafer lens is reduced, high production efficiency is maintained, and excellent optical characteristics are obtained. The image pickup device has a first lens block, a second lens block, a spacer, and a sensor unit. The side surface section of the first lens block, the side surface section of the second lens block, and the side surface section of the spacer are formed on the same plane. A lens cover that covers the first and the second lens blocks is provided in a step formed by respective side surface sections of the first lens block, the second lens block and the spacer, and the side surface section of the sensor unit.
摘要:
A cutting tool including a cutting blade, a shank section, and a supporting member for supporting and fixing the cutting blade, the cutting blade being fixed on one end of the supporting member, and the other end of the supporting member being fixed to the shank section, wherein a void formed among the shank section, the cutting blade, and the supporting member is filled with a filling agent.
摘要:
In a vibration cutting unit, a root portion of a holding member for supporting a vibration body is fixed on a fixed portion of a node portion which is common to axial vibration and bending vibration, on a jointless basis. Therefore, the node portion, namely, a vibration body main part is firmly fixed, thereby, the vibration body main part is supported stably, and vibrations of the vibration body main part is stabilized. In other words, vibrations under the mode where the vibration body main part cannot be controlled can be restrained, and works representing objects to be processed can be processed accurately.
摘要:
A motor drive circuit to drive a motor coil based on duty ratio of a PWM signal, includes: a first pulse signal generating circuit to generate a first pulse signal for each time period, the time period being equal to 1/n of a time period during which the PWM signal is at one logic level; a counter to change a count value based on the first pulse signal; a drive signal output circuit to output a drive signal of one logic level when the count value is not a predetermined value, and output the drive signal of the other logic level when the count value reaches the predetermined value; a drive circuit to perform PWM driving for the motor coil based on the duty ratio of the drive signal; and a setting circuit to set, in the counter, such a count value as to decrease a current passing through the motor coil, for each period of the PWM signal, in a time period during which the current passing through the motor coil is decreased, and set, in the counter, such a count value as to increase the current passing through the motor coil, for each period of the PWM signal, in a time period during which the current passing through the motor coil is increased, out of a time period during which the current passing through the motor coil is changed in direction.
摘要翻译:基于PWM信号的占空比来驱动电动机线圈的电动机驱动电路包括:第一脉冲信号发生电路,用于在每个时间周期产生第一脉冲信号,该时间段等于时间段的1 / n 在此期间PWM信号处于一个逻辑电平; 计数器,用于根据第一脉冲信号改变计数值; 当所述计数值不是预定值时,驱动信号输出电路输出一个逻辑电平的驱动信号,并且当所述计数值达到所述预定值时输出所述另一个逻辑电平的驱动信号; 基于所述驱动信号的占空比对所述电动机线圈进行PWM驱动的驱动电路; 以及设定电路,在通过所述电动机线圈的电流减少的时间段内,在所述计数器中,对于所述PWM信号的每个周期,在所述计数器中设定这样的计数值,以减小通过所述电动机线圈的电流, 并且在计数器中设置这样的计数值,以便在通过电动机线圈的电流增加的时间段内,在PWM信号的每个周期期间增加通过电动机线圈的电流,时间 其中通过电动机线圈的电流在方向上改变。
摘要:
A motor drive circuit is configured to drive a motor based on first and second position detection signals opposite in phase to each other, the signals having a frequency corresponding to a rotational speed of the motor and indicating a rotational position of the motor. The circuit includes a first level-shift circuit, a second level-shift circuit, a timing detecting circuit, and an output circuit. The first level-shift circuit is configured to shift a level of at least either one of the first and second position detection signals so that a first period, during which a first output signal corresponding to the first position detection signal is higher in level than a second output signal corresponding to the second position detection signal, becomes longer than a second period, during which the second output signal is higher in level than the first output signal.
摘要:
The tensile strength of the first fixing member is larger than the tensile strength of the second fixing member. When the attaching and detaching of the cutting tool is repeated, although the second fixing member having a smaller tensile strength gets deteriorated, it is sufficient to replace the second fixing member, and it is possible to prevent breakage of the first fixing member, and it is possible to reduce the frequency of replacing the vibration body. As the material for first fixing member, it is possible to use high-speed steel, cemented carbide, SCM steel (chrome molybdenum steel), etc. As the material for the second fixing member, it is possible to use cemented carbide, SCM steel, etc.
摘要:
A voltage selection circuit is disclosed which comprises: a first through a fourth inverters; a first switch circuit including a first MOSFET of N type and a second MOSFET of N type, respective drains thereof being connected in common; and a second switch circuit including a third MOSFET of N type and a fourth MOSFET of N type, respective drains thereof being connected in common, a common drive voltage being input to the first through fourth inverters, a control signal being input to the first inverter and the third inverter, the output of the first inverter being input to the second inverter and the gate of the fourth MOSFET, the output of the second inverter being input to the gate of the first MOSFET, the output of the third inverter being input to the fourth inverter and the gate of the third MOSFET, the output of the fourth inverter being input to the gate of the second MOSFET, a first input voltage selected depending on the control signal being input to the source of the second MOSFET, a second input voltage selected depending on the control signal being input to the source of the fourth MOSFET, the values of the drive voltage, the first input voltage, and the second input voltage being set for the first MOSFET or the third MOSFET such that each gate-source voltage thereof becomes higher than a gate-source threshold voltage at the time of turning on.