摘要:
An ink jet printer head and a piezoelectric actuator for the head, in which energy conversion efficiency from an electric energy to a mechanical vibration energy is high, and its mechanical displacement of a vibration transferring plate is large, are provided. An ink jet printer head having a piezoelectric actuator provides an upper electrode, a piezoelectric plate, a lower electrode, a vibration transferring plate, and a pressure chamber, whose shape is a rectangle and its length ratio of the short side to the long side is 0.8 or more and 1.0 or less. And the piezoelectric plate having the lower electrode is bonded to the vibration transferring plate at a position within the inside wall of the pressure chamber and the center positions of the piezoelectric plate and the pressure chamber are set to be almost equal. Therefore, the energy conversion efficiency of the piezoelectric plate can be utilized in its maximum, and the piezoelectric actuator whose mechanical displacement is large can be realized. Consequently, the industrial value of the ink jet printer head becomes large by applying the piezoelectric actuator to an ink jet printer.
摘要:
A Ni--Zn type ferrite has the composition represented by the general formula: Ni.sub.X Zn.sub.1-X Fe.sub.2-Y-Z Mn.sub.Y Zr.sub.Z O.sub.4 (0.55.ltoreq.X.ltoreq.0.80, 0.001.ltoreq.Y.ltoreq.0.20, 0.001.ltoreq.Z.ltoreq.0.04). The Ni--Zn type ferrite is formed with the step described below. A raw powder is first mixed for 64 hours and then fired at 850.degree. C. in an oxygen atmosphere for two hours. Next, the fired powder is crushed and then the crushed powder is again mixed. Then, a binder is added to the resulting powder, which is then press-formed under a pressure of 2.5 ton/cm.sup.2, and the press-formed powder is sintered at 1350.degree. C. for 5 hours in an oxygen atmosphere.
摘要:
The present invention provides a cooling apparatus which is easy to build and to fix it to electronic devices, superior in thermal conduction and heat dissipation, and possible to make thin the total configuration of the apparatus. The liquid cooling unit 9 and the air cooling unit 12 are formed in a unit. A heat absorption surface 19 of the liquid cooling unit 9 is contacted or bonded to the heat generation component such as the CPU and the heat generator, which have the largest power consumption and also locally generate heat within a small area in the box 2. In the liquid cooling unit 9, a liquid cooling pump 14 composed of an electromagnetic pump is arranged for circulating the coolant in the flow path 10. The heat generated by the heat generation components such as CPU 6, heat generator 7, and the like is thermally diffused with heat conduction into the whole liquid cooling unit 9 by circulating the coolant with the liquid cooling pump 14.
摘要:
A diaphragm pump enabling an increase in pump efficiency by reducing the pressure loss of liquid and reduction in thickness. The flow passage in piezoelectric pump (1) includes a pressure chamber (50) formed into a flat shape in cross section and a suction side flow passage (70a) and discharge side flow passage (70b). The suction side flow passage (70a) and the discharge side flow passage (70b) are disposed at both ends of the pressure chamber (50) so that the axes thereof are aligned with each other. The check valves (20a, 20b) are respectively disposed on the suction side flow passage (70a) and the discharge side flow passage (70b), and are tilted relative to the flow direction of the liquid.
摘要:
The present invention provides a cooling apparatus which is easy to build and to fix it to electronic devices, superior in thermal conduction and heat dissipation, and possible to make thin the total configuration of the apparatus. The liquid cooling unit 9 and the air cooling unit 12 are formed in a unit. A heat absorption surface 19 of the liquid cooling unit 9 is contacted or bonded to the heat generation component such as the CPU and the heat generator, which have the largest power consumption and also locally generate heat within a small area in the box 2. In the liquid cooling unit 9, a liquid cooling pump 14 composed of an electromagnetic pump is arranged for circulating the coolant in the flow path 10. The heat generated by the heat generation components such as CPU 6, heat generator 7, and the like is thermally diffused with heat conduction into the whole liquid cooling unit 9 by circulating the coolant with the liquid cooling pump 14.
摘要:
The differential type piezoelectric actuator comprises: a drive body having a unitary block of two piezoelectric element blocks and a base block formed from a material constituting the piezoelectric element blocks; and a support spring fixed to free ends in the longitudinal direction of the two piezoelectric element blocks, wherein a differential displacement obtained by expansion and contraction of the two piezoelectric element blocks generates a rotary movement of a tip end of the support spring.
摘要:
A Ni--Zn base ferrite is provided with a relatively small dielectric loss (tan.delta.(.epsilon.)) of the order of 10.sup.-3. Its saturation magnetization (4.pi.Ms) is relatively still high. A Ni--Zn base ferrite having a small dielectric loss (of the order of 10.sup.-3) can be obtained by proportioning raw materials to give a finished composition range of Ni.sub.X Zn.sub.1-X Fe.sub.2-Y-Z Mn.sub.Y M.sub.Z O.sub.4 where M: Ge and/or Sn, 0.55.ltoreq.X.ltoreq.1.00, 0.001.ltoreq.Y.ltoreq.0.36, and 0.002.ltoreq.Z.ltoreq.0.36, by calcination.
摘要翻译:Ni-Zn基铁素体具有10-3数量级的较小的介电损耗(tanδ(ε))。 其饱和磁化强度(4 pi Ms)相对较高。 可以通过配比原料得到Ni:Zi1-XFe2-Y-ZMnYMZO4的成品组成范围,其中M:Ge和/或Sn, 通过煅烧,0.55 = X <= 1.00,0.001 = Y <= 0.36和0.002
摘要:
Lead of ternary or quaternary piezoelectric ceramic compound is decreased by 0.1 to 5 percent by mole with respect to piezoelectric ceramic compound expressed by the chemical formula of �Pb(Mn.sub.1/3 Sb.sub.2/3)O.sub.3 !.sub.x �PbZrO.sub.3 !.sub.y �PbTiO.sub.3 !.sub.z where x+Y+z=1 or the piezoelectric ceramic compound the lead of which is partially replaced with calcium, barium or strontium, and the decrease of lead prevent the ternary or quaternary piezoelectric ceramic compound from undesirable segregation of lead compound at the grain boundaries so as to improve the mechanical output.
摘要翻译:相对于化学式[Pb(Mn + E,fra 1/3 + EE Sb + E,fra 2/3)表示的压电陶瓷化合物,三元或四元压电陶瓷化合物的铅减少0.1〜5摩尔% + EE)O 3] x [PbZrO 3] y [PbTiO 3] z其中x + Y + z = 1或其铅被部分被钙,钡或锶替代的压电陶瓷化合物,并且铅的减少防止三元或 四级压电陶瓷化合物由于在晶界上不合要求的铅化合物分离,从而提高机械输出。
摘要:
A viscoelastic body is interposed between a vibrating membrane vibrating in association with a piezoelectric vibrator composed of a piezoelectric element and a base and a support member supporting the vibrating membrane. The viscoelastic body attenuates vibration transmitted from the support member to the vibrating membrane and converts vibration of the vibrating membrane in the surface direction parallel to its main surfaces to vibration of the vibrating membrane in the direction nearly perpendicular to the surface direction. The vibrating membrane is annular with an opening at the center, and the base is joined to the vibrating membrane coaxially with opening.
摘要:
A breakdown prediction device of the present invention includes: a vibration measurement unit that measures vibrations generated from a device being monitored; and a signal processing unit that performs breakdown prediction when a specific vibration is measured at the vibration measurement unit, a maximum vibration amplitude value of the vibration exceeding an upper limit vibration amplitude threshold, and a vibration amplitude value thereof being below a lower limit vibration amplitude threshold at a point in time when a specified time is reached from a point in time when the vibration exceeds the upper limit vibration amplitude threshold.