97results about How to "Reduce vibration and noise problems" patented technology

To achieve vibration-dependent noise reduction by the use of a microphone to pick up an audio signal and a vibration sensor. The microphone apparatus according to a preferred embodiment of the present invention is one having one or more microphone, one or more sensor, noise extraction means for extracting the noise bandwidth section from the output signal of the sensor, an adaptive filter coordinated with the microphone for receiving the output signal of the noise extraction means as the reference input signal, and an adder for subtracting the output signal of the adaptive filter from the output signal of the microphone, wherein the vibration detection directions of the microphone and the sensor match, and so do the output polarities of the vibration signal.

An active vibratory noise control apparatus reduces vibratory noise which is produced in the passenger compartment of a vehicle based on vibratory noise generated by a variable-cylinder internal combustion engine that can selectively be operated in a full-cylinder operation mode in which all of the cylinders are operated and a partial-cylinder operation mode in which some of the cylinders are out of operation. The active vibratory noise control apparatus has a partial-cylinder operation mode determining circuit for determining whether the variable-cylinder internal combustion engine is in the partial-cylinder operation mode or not. Depending on a determined result from the partial-cylinder operation mode determining circuit, a transistor is turned on or off to switch an amplifying circuit which drives a speaker into and out of operation.

When the frequency of an engine rotation signal reaches a predetermined frequency, a comparator of a switching unit outputs a switching control signal to selectors and a filter coefficient updater. Based on the switching control signal, the selector switches from a connection between one memory and a corrector to a connection between another memory and the corrector, thereby changing the transfer characteristics Ĉrr of the corrector from Ĉ11 to Ĉ10. Based on the switching control signal, the selector switches from a connection between one ADC and a filter coefficient updater to the connection between another ADC and the filter coefficient updater, thereby supplying the filter coefficient updater with an error signal, rather than an error signal.

The power supply device includes a transformer, a switching unit for driving a primary side of the transformer, a control unit for outputting a pulse signal to the switching unit to control a switching operation including a period during which the switching unit is active and a period during which the switching unit is inactive, in order to output predetermined electric power from a secondary side of the transformer, and an output control unit for continuously outputting a pulse signal to the control unit in the period during which the switching unit is active, at a predetermined cycle shorter than the period during which the switching unit is inactive.

A fastener or routing clip for use in a vehicle is configured to reduce the surface area of that is in contact with the tube, wire, or cord to which it is mounted. The fastener clip simultaneously reduces vibration noise. The fastener clip may include two ends which may be connected to each other by a swivel hinge, which allows the two ends of the clip to close and snap-fit together. When in the closed position, the two ends, which further define corresponding semi-circular sections, will capture the tube, wire, cord, etc. thereby mounting them to the clip. The clip may then be mounted to the vehicle. The fastener clip may include at least one flex arm having a bulbous-like end that contacts and pushes on the tube, wire, cord, etc. to reduce the amount of surface contact between the tube, wire, cord, etc. and the clip, and functions as a dampener to reduce vibration noise.

The power supply device includes a transformer, a switching unit for driving a primary side of the transformer, a detection unit for detecting an output corresponding to a current flowing on the primary side, a transmission unit for transmitting an output voltage from a secondary side to the primary side, and a control unit for controlling an operation of the switching unit in accordance with an output from the transmission unit, in which, when a switching frequency for driving the switching unit falls within a predetermined frequency range including a resonant frequency of the transformer, the control unit controls the switching unit so as to shorten a turn-ON time of the switching unit in accordance with an output from the detection unit.

The present invention is a motor of rotor with built-in permanent magnet, which includes an annular stator and a rotor. The annular stator has a cylindrical interior into which the rotor is inserted. A space is formed between a circumference surface of cylindrical interior and rotor. The rotor further includes a rotor core, and a plurality of openings are formed surrounding the rotor core. Each opening is with two parallel surfaces, a top surface and a bottom surface, and each of them is a flat plate figure. A suitable distance is between two side surfaces and an outer circumference of the rotor, and the two side surfaces of adjacent openings are spaced by a channel fo suitable width. A plurality of permanent magnets are arranged in openings by way of interlaced magnetic poles, and the shape of permanent matches the shape of the opening.

An active vibration noise control apparatus is provided. When a vehicle speed changes thereby to change frequency characteristics (peak-amplitude frequency) of vibration noise, the active vibration noise control apparatus refers to a vehicle speed versus frequency correspondence table representing a correspondence relation between a vehicle speed of a vehicle and a frequency of a reference signal, and changes the frequency of the reference signal that is used by an adaptive notch filter.

A fastener or routing clip for use in a vehicle is configured to reduce the surface area of that is in contact with the tube, wire, or cord to which it is mounted. The fastener clip simultaneously reduces vibration noise. The fastener clip may include two ends which may be connected to each other by a swivel hinge, which allows the two ends of the clip to close and snap-fit together. When in the closed position, the two ends, which further define corresponding semi-circular sections, will capture the tube, wire, cord, etc. thereby mounting them to the clip. The clip may then be mounted to the vehicle. The fastener clip may include at least one flex arm having a bulbous-like end that contacts and pushes on the tube, wire, cord, etc. to reduce the amount of surface contact between the tube, wire, cord, etc. and the clip, and functions as a dampener to reduce vibration noise.

A light emitting electronic component, in which light emitted by an electroluminescent panel is visible through a translucent molding. The electroluminescent panel comprises an electroluminescent light emitting region having a first surface and a second surface opposite to the first surface and a non-emitting region. The electroluminescent light emitting region comprises a transparent electrode layer, an emitting layer, a dielectric layer and a backside electrode layer. The translucent molding is disposed in contact with the first surface of the electroluminescent light emitting region. The light emitting electronic component comprises a vibration absorbing sheet disposed in contact with the second surface of the electroluminescent light emitting region so as to absorb vibration which is generated during light emission of the electroluminescent panel.

Disclosed is a rack driving-type power assisted steering apparatus having effects of preventing a lock screw from being loosened due to vibration in axial and radial directions generated by a rack bar, a ball nut, and a rack housing when the rack bar slides while the ball nut rotates, reducing vibration and noise of the ball nut and the rack bar transferred through a bearing, and providing a driver with steering comfortability.

In a power steering apparatus employing an EPS (electrical power steering) motor coupled to a steering mechanism, when vibration of the steering mechanism is produced by twisting of tire rubber due to changes in steering angle, resultant pulsation of the drive current of the EPS motor are suppressed by adding to the drive current a current that is of equal frequency and opposite phase to the pulsation. Vibration of the EPS motor shaft, and resultant vibration of the steering wheel and vehicle body, are thereby effectively suppressed.

A capacitor microphone unit which includes a diaphragm assembly constituted by a diaphragm and a diaphragm support, a fixed electrode facing with the diaphragm with a clearance and functioning as a capacitor together with the diaphragm, a unit case housing components including the diaphragm assembly and the fixed electrode, and an elastic and conductive shock absorber provided between the diaphragm assembly, the fixed electrode and the unit case.

A reciprocating compressor comprises an inside stator formed by piling a plurality of stator cores to have an actinomorphic cylinder shape, which is press-fitted to a frame, and a streak protection member and a burr shielding ring installed between the inner aspect of the inside stator and corresponding outer aspect of the frame. Thereby the burr generating between the frame and the inner stator by a streak is prevented previously, and even if a burr is generated, this burr is locked in a burr escape unit in the burr-shielding ring. Therefore degrading of valve function and an abrasion of a sliding unit in a compressing unit by the burr generating is prevented and the vibration noise of the compressor is reduced by assembling the frame and the inside stator strongly.

In a gooseneck microphone device in which a microphone unit is supported by a column partially including a flexible pipe, the conductive resistance in a connecting portion of the flexible pipe is low, so that stable continuity can be secured for a long period of time, and vibrations are damped in the connecting portion of the flexible pipe. In connecting an end portion 21a of the flexible pipe 21 to a support pipe 22 via a connector 31, a spacer 40 (for example, a metallic mesh sheet 41) formed of a metallic material having electric conductivity and spring-like elastic restoring force is interposed in the connecting portion, and the flexible pipe and the connector are bonded to each other by an elastic adhesive which has elasticity even after being cured.

A multi-well helium Dewar is provided for recirculating coolant about a cryostat probe; the Dewar includes a first well containing a first coolant reservoir, and a second well containing a second coolant reservoir. A fluid connection extends between the first and second coolant reservoirs. A low impedance conduit further connects a top end of the second well to the first well. In this regard, the Dewar at least partially contains a cryocooler within the first well and a cryostat probe within the second well. Vibrational noise is reduced by the incorporation of soft mounting components for connecting various features. A thermal shield of the Dewar can be thermally connected to isolated components for additional cooling power and increased efficiency during initialization. A second fluid connection may include a valve attached to a counter-flow heat exchanger for efficiently re-condensing excess gas within the Dewar.

In a power steering apparatus employing an EPS (electrical power steering) motor coupled to a steering mechanism, when vibration of the steering mechanism is produced by twisting of tire rubber due to changes in steering angle, resultant pulsation of the drive current of the EPS motor are suppressed by adding to the drive current a current that is of equal frequency and opposite phase to the pulsation. Vibration of the EPS motor shaft, and resultant vibration of the steering wheel and vehicle body, are thereby effectively suppressed.

An image projecting apparatus includes a housing in which at least one vibration generating component is disposed, a vibration-proof supporting bracket coupled to a side of the housing to support the housing against an installation surface to absorb vibrations generated by the at least one vibration generating component, and a vibration guide part to couple the vibration-proof supporting bracket with the housing at a position that corresponds to the at least one vibration generating component, thereby transferring the vibrations generated by the at least one vibration generating component to the vibration-proof supporting bracket. Thus, the image projecting apparatus has a simplified structure which effectively reduces vibration noise of vibration generating components disposed therein.

A vibration-reducing method for reducing vibrations and vibration noise in a compressing diaphragm pump includes the step of disposing a vibration-reducing unit between the pump head body and a diaphragm membrane to reduce a length of the moment arm, and therefore of the torque, generated upon up and down movement of the diaphragm membrane during pumping.

A boundary microphone includes a base, a microphone unit that is mounted onto the base and converts voice into electrical signals, and a pressure-sensitive switch of membrane type for an on / off operation of output signals from the microphone unit. The pressure-sensitive switch is physically isolated from the base, and is supported at the bottom thereof by a switch support comprising a hard material.

The present invention is a motor of rotor with built-in permanent magnet, which includes an annular stator and a rotor. The annular stator has a cylindrical interior into which the rotor is inserted. A space is formed between a circumference surface of cylindrical interior and rotor. The rotor further includes a rotor core, and a plurality of openings are formed surrounding the rotor core. Each opening is with two parallel surfaces, a top surface and a bottom surface, and each of them is a flat plate figure. A suitable distance is between two side surfaces and an outer circumference of the rotor, and the two side surfaces of adjacent openings are spaced by a channel fo suitable width. A plurality of permanent magnets are arranged in openings by way of interlaced magnetic poles, and the shape of permanent matches the shape of the opening.

A transmission and drive system comprises an input end connected to a driving device, an output end connected to a rear wheel, a gear transmission mechanism and a belt driven transmission mechanism. A unidirectional transmission mechanism is connected to the rear wheel with the unidirectional transmission mechanism driving the rear wheel. The transmission provides power output by the driving device, transmits power to the pulley transmission mechanism by the gear transmission mechanism, and the pulley transmission mechanism drives the rear wheel to rotate the unidirectional transmission mechanism, such that the vehicle moves forward. Noise dampening plates are provided to reduce noise emanating from the transmission. In addition, a belt tensioning system is provided to maintain consistent tension on the belt.

A dynamic microphone includes a vibration pickup that detects vibration of a dynamic microphone unit, and outputs a signal for cancelling vibration noise; and a microphone case that supports the microphone unit and the vibration pickup, wherein the vibration pickup includes a laminated ceramic piezoelectric element that detects vibration of a microphone unit case and outputs a signal corresponding to the detected vibration, the laminated ceramic piezoelectric element has a capacitance that defines a resonance circuit in conjunction with an inductance of an inductor, the resonance circuit producing a response signal to acceleration corresponding to that of the vibration noise, and the resonance circuit is connected such that the response signal is output in an opposite direction to the vibration noise signal.

A gearshift operation device for a tiltable cab over type truck comprises a shift lever placed at an instrument panel, and a select cable and a shift cable which connect an operation lever unit for the shift lever and a manual transmission. After coming out of a cab, the cables curve to pass close by a hinge pivot which supports the cab, and extend toward the manual transmission.

In a seamless capsule manufacturing apparatus that ejects a droplet from a nozzle into hardening liquid to manufacture a seamless capsule SC, tube passages which are synthetic resin tubes are provided as flexible sections between pumps and the nozzle. The vibration caused by the pumps is absorbed in the flexible sections and thus is not transmitted to the nozzle, whereby eyes or the like of the seamless capsule caused by vibration noises can be suppressed. Instead of a synthetic resin tube, a vibration absorbing block formed of an elastic member may be attached to the tube passages. Alternatively, a vibration absorbing unit, which is provided with a pad formed of an elastic member and for holding the tube passages, may be provided.

In a silent chain, the toothed link plates are configured so that their centers of gravity are aligned with the line of action of chain tension in a free span of the chain, when the free span is straight and under tension. The positions of the centers of gravity are aligned with the centers of the pin holes in the case of a chain incorporating round connecting pins and are aligned with the points of contact of the rocker pins and joint pins in the case of a chain having rocker joint connecting pins. Positioning of the centers of gravity can be effected by thickening the backs of the link plates or by providing weight-reducing holes in the vicinity of the teeth of the link plates.

Mass portions of torsional dampers are annular surrounding corresponding elastic portions. The mass portion of the torsional damper has a first inclined face formed such that the elastic portion deforms in a sheared manner as the mass portion rotates in a rotational direction with respect to a companion flange and the elastic portion partially deforms in a compressed manner as the mass portion rotates in a direction other than the rotational direction. The mass portion of the torsional damper has second inclined faces formed such that the elastic portion deforms in a sheared manner as the mass portion rotates in the direction of the rotational axis of the companion flange and the elastic portion partially deforms in a compressed manner as the mass portion rotates in a direction other than the direction of the rotational axis.

A combustion apparatus includes a burner (11), a heat exchanger (12) accommodated in a casing (20), an exhaust passage (22B) provided to one side surface side of the casing (20), and an exhaust resistance member (5) having a plurality of ventilation ports (50) through which combustion exhaust gas passes, wherein at least one part of the ventilation ports (50) has an elongated hole shape extending in the flow direction of the combustion exhaust gas from beneath the casing (20) to the exhaust passage (22B).

There is provided an oil pump supporting structure which can prevent vibration and noise of an oil pump. A pump holding member is disposed in substantially parallel with the tensioning direction of a chain, for connecting a partition member and the oil pump to each other. As a result, vibration occurring in the tensioning direction of the chain when the oil pump is driven can be suppressed to reduce vibration noise.

A slide switch 100 according to the present invention includes a slider 20, a case 10 into which the slider 20 is inserted, performing switching by a sliding operation of the slider 20, cushioning means (an upper part, a left part, and a right part) 21a, 21b, and 21c, provided at contacting places in the side of the slider where the slider 20 and the case 10 come into contact by the sliding operation of the slider 20 for relieving the contact, and a cushioning means holding member 21 for integrally supporting the cushioning means, wherein the case 10 has case inner faces on which the slider 20 slides, and which face each other along a horizontal direction, one of the inner faces of the case 10 has a positioning part 11a for positioning the slider 20 at three positions, and the other of the inner faces of the case 10 has a positioning part 11d for positioning the slider 20 at two positions.This can reduce generation of vibration noise of the slide switch due to vibration of a vehicle under running and operation noise due to a switching operation to improve an operation feeling of the vehicle.