Abstract: A vehicle seat having an adjustable thigh support, the vehicle seat comprising an adjustable thigh-support component, wherein the component is an adjustment plate that is moveable in the fore and aft directions of the vehicle; and wherein the adjustment plate is positioned generally toward the front edge of the seat; a motor-driven vertical power screw for rotatably moving the adjustment plate in the fore and aft direction of the vehicle, wherein tile seat length is increased when the screw rotatably causes the adjustment plate to move in the fore direction of the vehicle, and wherein the seat length is decreased when the screw rotatably causes the adjustment plate to move in the aft direction of the vehicle; and a seat cushion having an underside that contacts at least a portion of the front face of the adjustment plate, wherein the surface area of the seat-cushion underside that contacts the front face of the adjustment plate varies as a function of the adjust-plate position.

Abstract: A vehicle seat is provided which includes a seat base detachably mounted on a vehicle floor, a seat cushion detachably provided on the seat base, and a backrest foldably supported on the seat base. The seat cushion is detached from the seat base, and the seat cushion and the seat base with the backrest folded are juxtaposed to be stored in a recess provided in the vehicle floor or an area under another seat. In the case of non-use, the vehicle seat can be removed from the vehicle floor to be efficiently stored inside a vehicle. A vehicle seat storing structure and a vehicle seat structure are also provided.

Abstract: A body-supporting device includes a tray, a net and a frame. The tray includes a margin and a groove in the margin. The groove gets narrower downwardly. The net includes a margin. The frame includes a first rib for inserting the margin of the net into the groove of the tray and a second rib for pressing the margin of the net against the margin of the tray. The first rib gets narrower downwardly. Fasteners are driven into the first rib of the frame through the margin of the tray. The sandwiching of the margin of the net between the first rib of the frame and the margin of the tray gets firmer as the fasteners get tighter in the first rib of the frame.

Abstract: An assembly for mounting a seat back shell to a wheelchair seat back cane comprises a first portion attachable to the seat back cane and a second portion attachable to the seat back shell. The portions mate to form a point of attachment by aligning one of the portions with the other portion and displacing one of the portions in relation to the other portion.

Abstract: A kit for use in producing a three-dimensional article from flat cardboard sheets, includes: a cardboard assembly of flat cardboard sheets, each cut according to a predetermined configuration and formed with a predetermined arrangement of fold lines such as to permit the cardboard assembly to be folded from a flat condition for shipping and handling, to a three-dimensional condition defining a three-dimensional article having dimensional stability, structural rigidity and a pleasing appearance. Disclosed, for purposes of example, are kits for producing a stool, a chair, a desk and a table.

Abstract: An aircraft seat assembly configured in accordance with an example embodiment of the invention offers a light weight and comfortable seat cushioning system that also provides energy-absorption and enhanced passenger maneuverability in extreme conditions such as may be experienced in a hard landing situation. The cushioning system includes a crushable, energy-absorbing layer, a main cushioning layer, a smaller ishial insert layer which may be the same as the main cushioning material and a semi-dynamic pneumatic cell which uses a dual action breather valve to vary its inflation with changes in cabin pressure. The seat cushion may be finished with a covering of cloth or upholstery.

Abstract: Methods, systems, and apparatuses are disclosed for classifying shale gas formations based on geochemical, petrophysical and/or petrological properties. In preferred embodiments, the methods, systems, and apparatuses classify gas shales according to the processes of hydrocarbon generation (i.e., thermogenic versus biogenic), the degree of clay maturation, the dominant composition of the gas shales, and the like. The methods, systems, and apparatuses also account for formation characteristics such as total organic carbon, degree of Kerogen maturity, and the like. Such an arrangement allows for consistent and reliable identification of productive (and likely profitable) types of shale gas reservoirs.

Abstract: The present invention provides a bicycle hub that is usable with a disc brake. The hub has a tubular body extending along a longitudinal axis between the ends thereof. One end of the hub is configured to mate with and retain a brake disc on a disc seat that has a predetermined configuration. Spaced from the disc seat along the longitudinal axis there is a fastener portion of the hub which is configured to receive a fastener that locks the disc on the hub.

Abstract: An assembly for the primary fastening of a bicycle or other wheeled vehicle wheel to wheel mount(s), as is commonly done by a cam operated quick release, incorporating a uniquely formed drawbar and a rotation handle wherein primary fastening is accomplished by simple rotation of the rotation handle about the drawbar axis.

Abstract: An auxiliary braking system has a main controller, a holding device, a rotating member, a pressure switch, a rotating sensor assembly and a pressed switch. The main controller has a time setting device. The holding device has a cable sleeve, a cable, a holding element and a clutch. The holding element is mounted on one end of the cable and is connected to a brake pedal of the vehicle. The clutch is connected to cable. The rotating member is mounted around a transmission axle of the vehicle. The pressure switch is electrically connected to the main controller to detect a pressure of a braking oil system of the vehicle. The rotating sensor assembly corresponds to the rotating member to detect the rotation of the rotating member. The pressed switch is electrically connected to the main controller and is contacted with an accelerator pedal of the vehicle.

Abstract: A track shoe for connection to a chain link is disclosed. The track shoe may have a generally planar base portion configured to span two opposing elements of the chain link. The base portion may have a leading edge, a trailing edge, and opposing side edges connecting the leading and trailing edges. The track shoe may also have an integral grouser bar extending substantially perpendicularly from a ground-engaging surface of the base portion and extending transversely across the ground-engaging surface between the side edges. The grouser bar may have a plurality of integral teeth fabricated with a trapezoidal shape, when viewed from the leading and trailing edges.

Abstract: An enhanced interface between typical utility power line protection and filtering products which is capable of passing both conditioned power and desired control commands and audio and video signals to the same outlet. Products used within the home which may be benefitted by the present invention include, but are not limited to, audio devices, visual devices, and computers.

Abstract: A system and method for switching power sources for an aircraft electric brake system is disclosed. The method removes battery power from electric brake actuator controls during flight until landing gear extension occurs. The method utilizes a logic circuit to switch between available power sources based on a plurality of control signals. The method minimizes the total power drawn during flight, and saves battery power if the aircraft calls for operating on battery power only.

Abstract: An electric power generation system is described can include a variable speed generator and an engine driving the generator to provide an AC electric power output. The output is monitored for different types of transient conditions. For example, electric current of the output is evaluated to identify a first type of transient condition and power factor of the output is evaluated to identify a second type of transient condition. System adjustment is made based on the condition type. In one form, the system is used to provide electricity on board a vehicle such as a motor coach, ship, or the like. In other forms, the system provides electric power to a remote building that does not have access to a public power grid or the system provides back-up power in case of power grid failure or the like.

Abstract: An electric power system includes a variable speed generator driven by an engine and an electrical energy storage device. The generator and the storage device are coupled to a variable voltage DC bus. An inverter converts DC electricity from the DC bus to AC electricity for one or more electrical loads. A detector is included to monitor electric current provided to the DC bus by the storage device and provide a corresponding signal. Control circuitry is responsive to this signal to regulate power output from the storage device to the DC bus.

Abstract: In one technique of the present invention, DC electric power from a DC bus is inverted to provide AC electricity to one or more electrical loads, and AC power from a variable speed generator is rectified to provide a first variable amount of electric power to the DC bus. This technique also includes determining power applied to the electrical loads, and dynamically controlling the amount of power supplied from the generator and an electrical energy storage device in response to the power applied to the loads.

Abstract: An apparatus includes a vehicular electric power generation system comprising a variable speed internal combustion engine, a first variable speed electric power generator driven by the engine, a second variable speed electric power generator driven by the engine, a first inverter to receive electric power from the first generator a provide a first controlled electric output, a second inverter to receive electric power from the second generator and provide a second controlled electric output, and a controller coupled to the engine. The controller is responsive to variation in electrical loading of the first inverter and the second inverter and a degree of electrical load imbalance between the first inverter and second inverter to provide one or more engine control signals. The engine is responsive to the one more engine control signals to change rotational operating speed to adjust for the variation in electrical loading and the degree of electrical load imbalance.

Abstract: A power supply apparatus may include a plurality of power supply circuits, an individual soft start circuit including a first terminal for outputting a predetermined fixed voltage and a second terminal for outputting a voltage that varies with time, and an individual soft start switch. The individual soft start circuit may be operated when any of the plurality of supply voltages output from the power supply circuits is caused to make a transition individually. The individual soft start switch may connect the power supply circuit with the first terminal or the second terminal of the individual soft start circuit. The plurality of power supply circuits may apply soft start control to the respective supply voltages in accordance with the soft start voltage output from the individual soft start circuit.

Abstract: A power distribution device of a power storage apparatus comprises a power source and an uninterruptible power supply (UPS) system, wherein the UPS system has a built-in power output selector. An input terminal of the UPS system is connected to the power source. An output terminal of the UPS system is connected to several electric appliances via the built-in power output selector. As a result, no matter whether the power source supplies or not supplies the electric power, the built-in power output selector of the UPS system is able to supply the electric power to designated electric appliances according to the predetermined priority sequence and timing.

Abstract: In some embodiments, an N output isolated converter includes an isolated converter circuit having N+1 switch circuits, the isolated converter circuit being configured to receive an input voltage and to provide N output voltages, where N is two or more, and a control circuit to selectively provide control signals to the N+1 switch circuits at time intervals in accordance with the N output voltages. The N output isolated converter may include a single secondary transformer. Other embodiments are disclosed and claimed.

Abstract: A power converting apparatus used as an uninterruptible power supply connected between an AC power supply and a load includes first and second power converters, a power supply voltage sensor, an output voltage sensor and a controller. The controller calculates rms voltage values of positive and negative half-cycles of an AC output voltage detected by the output voltage sensor, generates a target voltage command based on calculation results and a given reference voltage command, and controls the first power converter based on an output voltage command which is equivalent to a voltage difference between the AC power supply voltage detected by the power supply voltage sensor and the target voltage command.

Abstract: An apparatus to enable convenient connection to an external power source and alarming means for a battery powered hand-held electronic device on a display when the device lacks means for such a connection is provided. The apparatus fits in the space provided for conventional disposable batteries and comprises an insulating housing, preferably cylindrical in shape with metallic caps that function as positive and negative terminals at the ends and a printed circuit having reverse polarity protection means within the housing connecting the terminals, and an electrical lead connected to an electrical connector that protrudes through an opening in the housing and connects to the external power source and alarming means which feeds the required current and puts the device into an alarm circuit. The device further typically comprises a small metallic cylinder that loosely fits within a cavity in the exterior of the negative terminal and makes contact with the negative battery contact.

Abstract: A mobile electric power generation system includes a variable speed generator, an engine to drive the generator, a DC bus coupled to the generator, an inverter coupled between the DC bus and an electrical power bus in the vehicle, an electrical energy storage device coupled to the DC bus, an operator interface including a display and several operator input devices, and operating logic executed by a processor. One operator input device is used to initiate an automatic mode of operation of the system. The operating logic is structured to activate both the generator and the inverter during the automatic mode. Another operator input device is selected to initiate a manual mode of operation. The operating logic is responsive to one input to change activation of the generator and to another to change activation of the inverter.

Abstract: Power supply systems and methods are provided.

Abstract: An uninterruptible power supply (UPS) is provided that can alleviate difficulties in shipping electronic devices containing batteries, such as UPS devices by providing a battery connect/disconnect assembly that can connect and disconnect an internal battery from outside the chassis of the UPS. The UPS comprises an input, output, DC voltage source, electrical circuit, chassis, and connect/disconnect assembly. The input receives input power from an input power source, and the output provides output power to a load. The DC voltage source provides DC power and has first and second terminals. The electrical circuit is operably coupled to the DC voltage source and is capable of receiving the input power and providing the output power. The chassis houses at least the DC voltage source and the electrical circuit. The connect/disconnect assembly is operably coupled to the DC voltage source and is constructed and arranged to be operable from outside the chassis.

Abstract: An inductive power supply system to identify remote devices using unique identification frequencies. The system includes an AIPS and a tank circuit capable of inductively providing power to a remote device at different frequencies, and a sensor for sensing the reflected impedance of the remote device at tank circuit. The system further includes a plurality of different remote devices, each having a unique resonance frequency. In operation, the AIPS is capable of identifying the type of remote device present in the inductive field by applying power to a remote device at a plurality of unique identification frequencies until the remote device establishes resonance in response to one of the identification frequencies. The AIPS includes a controller that recognizes when resonance has been established by evaluating sensor data, which is representative of the reflected impedance of the remote device.

Abstract: A control circuit with manual/remote control function is serially connected to a power supply for providing electric power and a load. The control circuit includes a three-way switch having a switching key, a signal indicator module, and a remote control module. The three-way switch and the remote control module are serially connected between the power supply and the load. When the three-way switch is pressed down or the remote control module receives a wireless signal sent from the signal indicator module, the three-way switch or the remote control module is switched to form a closed/open circuit between the power supply and the load, so as to control the state of the load by conveying/stopping supplying the electric power, thereby achieving the purpose of controlling the load via a distal remote control and a proximal manual control.

Abstract: A system for operating an output device in a vehicle. The system includes a trim component and operative and initial sensors positioned at the back side of the trim component. An operative sensor provides a signal to at least one output device when an object is detected within a second sensing region adjacent the front side of the trim component. An initial sensor provides a signal to a display device for selectively displaying the location of the second sensing region, when an object is sensed within a first sensing region adjacent the front side of the trim component. Additional aspects of the invention include various systems and methods for operating the output device in a vehicle.

Abstract: The switch device includes a control switch that turns on/off an electrical connection between an apparatus and the power supply, a condition judging circuit that judges conditions of driving the control switch, an electric wave reception circuit that receives an electric wave, and a power supply circuit that generates power from the electric wave received by the electric wave reception circuit. An electric wave transmission device that transmits an electric wave for making the switch device operate is arranged in a space, whereby the electric wave can be received by the electric wave reception device in the specific space. The switch device controls the control switch to be turned off/on when the electric wave is received. Alternatively, when the electric wave is not received, the switch device turns on/off the control switch.

Abstract: The present invention relates to a linear unit comprising at least one guide rail 12, at least one substantially U shaped carriage 40 displaceable on the guide rail 12, and a transverse support segment 42 and two lateral leg segments 44, where the segments 42, 44 partly enclose the guide rail 12, further a playfree bearing configured between the guide rail 12 and the carriage 40 and at least two bearing elements and at least two bearing surfaces 14 constituted at the guide rail 12 to brace and guide the bearing elements, and means to adjust the bearing in playfree manner. In the invention, the bearing elements are designed in a manner that they are rotatable relative to the guide rail 12 and the carriage 40 to adjust the bearing in playfree manner. The rotatable design of the bearing elements of the invention assures that they automatically align themselves with respect to the corresponding bearing surfaces when the bearing is being adjusted.

Abstract: An oscillatory machine (200) comprises a support (220) having a load carrying surface (222) and an opposite surface (224), an electric motor (21) having an air gap (218) through which lines of magnetic flux extend, an armature (214) coupled to the support, said armature provided with at least two electrically conductive paths [CA,CB,CC] each having at least one current carrying segment disposed in the air gap and substantially perpendicularly intersected by the lines of magnetic flux (FIG. 1) to produce thrust forces [TA, TB, TC] which act to move the armature and thus said support in two dimensions in a plane, a bearing support system (272) suspending said armature in the air gap, said bearing support system disposed between the said support and said armature.

Abstract: A plate spring for voice coil motor includes a flat plate having a central opening and provided around the central opening with an even number of identically shaped slits. The slits are so bent and staggered on the flat plate that the flat plate is divided into an inner movable portion and an outer fixed portion, which are connected via an even number of three-section linear elastically bendable portions. When the inner movable portion is subjected to an external force, the elastically bendable portions are elastically bent to allow the inner movable portion to move forward or backward relative to the outer fixed portion without sideward inclining; and when the external force is released, the inner movable portion is automatically and quickly returned to an original position by an accumulated restoring force of the elastically bendable portions.

Abstract: A stator includes split cores arranged in a cylindrical shape. Coils are wound continuously around teeth of split cores forming the same electrical phase via a bridge line. On the outer surface of the split core, openings are formed at the upper end face and the lower end face. Through these openings, a convex portion of a jig is inserted to an engagement groove, whereby the split core is supported by the jig. A bridge line of each coil is led out from the teeth side to the outer surface side through an outlet. The led-out bridge lines are placed in storage grooves in a mutually non-contact manner.

Abstract: A vibration motor that includes a base and a case which form an internal space, a shaft rotatably inserted in the base and the case, a rotor inserted onto the shaft and configured to rotate, which includes multiple wound coils and a commutator connected to the wound coils, a weight attached to a lower surface of the rotor, a brush which is in contact with the commutator and which is positioned on the base, and a magnet facing the rotor, can increase vibration and reduce electrical consumption during operation.

Abstract: A telescopic actuator includes a motor having a rotation shaft, a reduction gear which decelerates an output rotation of the rotation shaft, a feed screw mechanism having a male screw member and a female screw member which are relatively rotated by an output rotation of the reduction gear, a first housing accommodating the motor, and a second housing accommodating the reduction gear and the feed screw mechanism. The first housing and the second housing are detachably attached.

Abstract: A permanent magnet electric generator includes a housing, and a stator and a rotor assembly disposed inside the housing. The rotor assembly is concentric with an axis of rotation. The rotor assembly has annular inner and outer rings concentric with the axis of rotation. The rotor assembly is adapted to be rotationally coupled to a shaft. The shaft is rotationally coupled to a source of rotational energy for rotating the rotor assembly. A plurality of permanent magnets are distributed on the inner surface of the outer ring. Each magnet has a north pole and a south pole aligned to the axis of rotation such that adjacent magnets have poles of alternating polarity. The permanent magnets are distributed circumferentially on the inner surface of the outer ring and in close proximity to the stator blocks. The stator assembly is at a static location with respect to and in close proximity to the rotor assembly.

Abstract: A motor includes a first housing, a second housing, a rotor and a stator. The second housing is assembled with the first housing to form an accommodating space. The second housing has a flange adjacent to the connection between the first and second housings. The rotor has a shaft extended outwardly from the second housing and disposed in the accommodating space. The stator is disposed corresponding to the rotor and in the accommodating space. The flange has at least one protruding portion. When the second housing is assembled with the first housing, the protruding portion presses against the stator and is deformed so that the first and second housings are sealed.

Abstract: An electric power generation system is disclosed. The electric power generation system includes: a string configured to be pulled; a bobbin configured to rotate when the string is unwound from the bobbin as the string is pulled; an electric power generator having a rotor wherein the rotor is mechanically coupled to the bobbin; and a case with a sealed chamber and a chamber that can be opened. The sealed chamber protects the electric power generator from environmental contamination and the chamber that can be opened allows the string to be accessed.

Abstract: The invention relates to an electric motor with a rotor that comprises a rotor shaft and a rotor body, and a stator that comprises a stator lamination packet with a plurality of stator laminations and at least one integrated bearing seat for receiving a bearing, in which the rotor shaft is rotatably supported, whereby at least one endface stator lamination of the stator lamination packet comprises means for reinforcing the bearing seat.

Abstract: An ultra-thin spindle motor having a groove formed on the outer circumferential surface of a thrust bearing is disclosed. The present invention relates to an ultra-thin spindle motor among small-sized motor using a hydro dynamic pressure generating bearing and its object is to provide a spindle motor capable of stably driving without requiring a sleeve that was required to support a shaft in a radial direction in which a thrust bearing sleeve for coupling a hub and a thrust bearing is constructed and a radial hydro dynamic pressure generating groove is formed on the outer circumferential surface to thereby allow a radial hydro dynamic pressure to be generated and support a thrust bearing sleeve coupled integrally to the hub.

Abstract: An axial induction motor structure including a case, a rotor, and a stator is provided. The rotor is pivoted on the case by a shaft and includes a ring-magnetic section. The ring-magnetic section is composed of a plurality of magnet-conducting parts. The adjacent magnet-conducting parts have different magnetic polarities. The stator and the rotor are co-axially stacked. In addition, the stator has a plurality of magnet-generating parts corresponding to the magnet-conducting parts. When the magnet-generating parts are conducted, the magnet-generating parts generate the magnetic polarities different from those of the magnet-conducting parts periodically, such that the rotor is rotated. Thus, the radial length of the axial induction motor is reduced so as to decrease the overall volume and to reduce production cost.

Abstract: A permanent magnet motor is provided. The permanent magnet motor includes a stator having a stator shaft having an outer surface, K salient teeth formed upon the outer surface, and K winding slots formed among the K salient teeth, and a rotor having a first inner surface facing the outer surface, and P pairs of permanent magnets formed on the first inner surface, each of which has a second inner surface facing the outer surface and at least a groove formed on the second inner surface to reduce a cogging torque.

Abstract: A process for mounting magnets in an electric motor rotor and an electric motor rotor, said rotor comprising: a lamination stack (10) provided with a plurality of axial channels (12) disposed around a central axial bore (11) and housing permanent magnets (20); and a rotor cage (30) formed by a pair of end rings (31), each seated against an adjacent end lamination of the lamination stack (10) and interconnected by a plurality of bars (32), said process comprising the steps of: forming an end, ring (31) with at least one inner radial projection (33) disposed radially external to the projection of the contour of an axial channel (12); mounting in each axial channel (12) at least one permanent magnet (20); and deforming each inner radial projection (33) in order to increase its radial extension the sufficient to radially cover at least part of the projection of the contour of said axial channel (12), defining a stop for axially retaining the respective permanent magnet (20).

Abstract: Disclosed is a rotor winding including a winding strip configured to be disposed with a rotor, and at least one notch defined by a portion of the strip.

Abstract: A system is provided in a permanent magnet (PM) machine comprises a stator, a rotor configured to rotate relative to the stator, a first set of windings disposed within the stator; and a second set of windings wound back and forth toroidally around the circumference of the stator. In accordance with an embodiment of the present technique the set of windings is configured to generate a magnetic flux saturating the stator so as to limit fault currents within the PM machine.

Abstract: The present invention relates to a stator component for an electric motor. The stator component for an internal rotor motor comprises a circular stator yoke having an inner periphery, a number of poles, the poles spaced apart from each other along the inner periphery of the stator yoke and extending radially inward from the inner periphery of the stator yoke, wherein each pole consists of an enlarged pole shoe and a neck connecting the pole shoe to the stator yoke, wherein the axial height of the stator yoke is higher than the axial height of the neck of each pole, and a coil wound around the neck of each pole. The invention also relates to a stator component for an external rotor motor, wherein the stator poles are arranged along an outer periphery of the stator yoke and extending radially outward from the outer periphery of the yoke.

Abstract: The invention comprises an electrical machine with a stator (10) formed of plates, said stator (10) having an outer surface (11) and a first and second end (12) in the axial direction (2) and said stator being supported on the frame (1) of the electrical machine. The stator (10) is supported by necks of material (40a-d) on the outer surface (11) at both ends of the stator. The number of necks (40a-d) at both ends of the stator is even. The stator (10) has a vertical symmetry axis (7) perpendicular to the axial direction (2) and a horizontal symmetry axis (8) perpendicular to the axial direction (2), and the necks (21a-f, 31a-d, 40a-d) are located symmetrically in relation to at least one of the symmetry axes (7, 8).

Abstract: Based on the voltage-division theory, this invention proposes a new method to decrease the driving voltage of the micro scratch drive actuator (SDA) by using an ultra-low resistivity silicon wafer as substrate. This patent has compared two SDA actuators with the same layout and fabricating processes but under different resistivity of substrate. The SDA fabricated on the ultra-low resistivity silicon wafer has demonstrated a lower driving voltage of only about 4˜12 Vo-p. However, the conventional SDA using normal silicon wafer needs higher driving voltage (30˜75 Vo-p), thus has lower probability for commercial applications. On the other hand, this invention presents a new SDA process to overcome the inherent 2 ?m line-width limitation of conventional mask aligner with 4360 ? UV wavelength light source (g-line) and further to reduce the driving voltage of SDA.

Abstract: To improve the yield, lifetime and driving voltage of the micro scratch drive actuator (SDA), this invention proposes a novel layout design including the etch holes and flange structure designs. Once the etch holes added to the layout of conventional SDA plate, the releasing of structure layer can be accelerated and the accumulated residual charges in the front end of SDA plate is reduced. In this innovative design, a longer lifetime and lower driving voltage of the SDA device can be achieved. On the other hand, adding the flange structure design in the corner of the beam-to-plate conjunction can improve the flexural rigidity of the narrow polysilicon supporting beam which will further enhance the yield of the SDA device and reduce the crack failure under actuating situation.

Abstract: There is provided an electrostatic actuator with the interdigitated electrode structure comprising a movable rod 11 disposed in parallel with an alignment axis line Ox predetermined on a substrate; a movable interdigitated electrode 12 fixed on the both sides of a coupling point 11C on the movable rod 11 and having a plurality of movable electrode fingers 12b; fixed interdigitated electrodes 21, 22 fixed to the substrate and having a plurality of fixed electrode fingers 21b, 22b; and four hinges 23, 24 whose one ends are anchored respectively to the movable rod and the other ends are anchored to anchoring points 32A-32D of the substrate. Lengths of those hinges are longer than distances from anchoring points to the alignment axis line and a displacement Lc of a coupling point 11C in a direction orthogonal to the alignment axis line is reduced to be smaller than a distance between the respective movable electrode fingers and the closest fixed electrode finger.