Abstract: A liquid discharge head includes a nozzle forming member having a nozzle configured to discharge liquid; an opening and closing member configured to open and close the nozzle; a piezoelectric body configured to expand and contract in an axial direction in response to a drive voltage so as to actuate the opening and closing member such that the nozzle is opened and closed; a first housing member having a cylindrical shape and configured to house the piezoelectric body; and a ground member configured to contact an inner side of the first housing member.

Abstract: A disclosed paint discharging nozzle is designed for discharging paint supplied at a predetermined pressure. The paint discharging nozzle includes a housing having a nozzle hole through which paint is discharged; a paint chamber configured to supply paint to the nozzle hole; a needle valve retractably or advancingly fitted into the housing to close or open the nozzle hole; a driving mechanism disposed in the housing and configured to cause the needle valve to perform a retracting or advancing operation with respect to the nozzle hole; and a bearing disposed to surround the needle valve within the housing to be in sliding contact with a peripheral surface of the needle valve as the retracting or advancing operation of the needle valve is performed, wherein the bearing is movable in an axial direction of the needle valve.

Abstract: In order to provide a differential mobility analyzer and the like that allows (i) easy increase of an upper limit of particle size of charged particle which can be classified and (ii) analysis of charged particles whose particle size is variable, a DMA (Differential Mobility Analyzer) includes: a classification tank in which an inlet electrode having an inlet slit, an intermediate electrode having a slit, and an outlet electrode having an outlet slit are arranged in sequence in such a manner that adjacent electrodes are disposed opposing each other at predetermined intervals; a gas supply section supplying the classification tank with sheath gas; and a voltage generator applying a predetermined voltage between the electrodes disposed opposing each other, the classification tank including a first classification section and a second classification section each formed by the electrodes disposed opposing each other, and the gas supply section controlling a flow rate of the sheath gas to be supplied to the classif

Abstract: In order to provide a differential mobility analyzer and the like that allows (i) easy increase of an upper limit of particle size of charged particle which can be classified and (ii) analysis of charged particles whose particle size is variable, a DMA (Differential Mobility Analyzer) includes: a classification tank in which an inlet electrode having an inlet slit, an intermediate electrode having a slit, and an outlet electrode having an outlet slit are arranged in sequence in such a manner that adjacent electrodes are disposed opposing each other at predetermined intervals; a gas supply section supplying the classification tank with sheath gas; and a voltage generator applying a predetermined voltage between the electrodes disposed opposing each other, the classification tank including a first classification section and a second classification section each formed by the electrodes disposed opposing each other, and the gas supply section controlling a flow rate of the sheath gas to be supplied to the classif