80results about How to "Reduce contact noise" patented technology

In a transmission chain having link plates with convex edges for sliding contact with a guide surface, the plates are asymmetric in shape so that the distance from a line connecting the centers of the connecting holes and the convex edge is greatest at a position other than at the midpoint between the connecting holes. A pivoting action of the link plates takes place as they slide over a guide surface, changing the abutment point.

A linear vibration motor comprising a movable unit, a base assembly having a coil assembly, a housing and an elastic member, in which the movable unit has the maximum mass from a fixed housing volume. The elastic member has the outer periphery fixed to the ceiling of the housing and the inner periphery fixed to the top of the movable unit opposed to the outer periphery. The elastic member is deformable to the extent that the outer and inner peripheries are shift to a coplanar position from a parallel position where they are spaced for a predetermined distance from each other. The core assembly is distanced downward from the movable unit or a predetermined gap.

The invention discloses a method for testing low-frequency noise of an amorphous silicon membrane, and specifically relates to a testing technology of low-frequency current noise of the amorphous silicon membrane. A testing system adopted by the testing technology comprises a biasing circuit, an electromagnetic shielding device, a noise amplifying system and a data acquisition and processing system. Firstly, the low-frequency current noise of the amorphous silicon membrane is motivated through the biasing circuit, sample low-frequency noise is amplified through a low-frequency noise current amplifier, amplified noise signals are acquired through a data acquisition card, corresponding current noise signal power spectral density is calculated, finally data are analyzed and processed through a computer, and a power spectral density curve of the low-frequency noise of the amorphous silicon membrane is obtained. The method for testing the low-frequency noise of the amorphous silicon membrane can be used for testing the low-frequency noise of the amorphous silicon membrane repeatedly and accurately, and is fast and convenient.

A passenger distinguishing apparatus is provided. The passenger distinguishing apparatus includes: a weight detection sensor that is assembled in a vehicle seat to detect a passenger's weight; and a first bracket and a second bracket that assemble the weight detection sensor in the seat, wherein the weight detection sensor has a length direction in a horizontal direction of the seat, and a first damper for absorbing assembling tolerance of the weight detection sensor is disposed between the first bracket and the weight detection sensor. Therefore, assembling tolerance can be absorbed with minimum parts, production can be improved, contact noise can be reduced, and a weight and cost can be reduced.

A voice coil motor (VCM) is disclosed, the VCM including: a stator including a magnet generating a first electromagnetic field; a mover including a bobbin formed with a hollow hole through which light passes and a coil formed on a periphery of the bobbin that generates a second electromagnetic field responsive to the first electromagnetic field; a base fixed at the stator and formed with an opening through which the light passes; and at least one elastic member elastically supporting the bobbin and forming a gap between the bobbin and the base when the coil is not applied with a current.

A voice coil motor (VCM) is disclosed, the VCM including: a stator including a magnet generating a first electromagnetic field; a mover including a bobbin formed with a hollow hole through which light passes and a coil formed on a periphery of the bobbin that generates a second electromagnetic field responsive to the first electromagnetic field; a base fixed at the stator and formed with an opening through which the light passes; and at least one elastic member elastically supporting the bobbin and forming a gap between the bobbin and the base when the coil is not applied with a current.

A thin film magnetic head having one or more magneto-resistive (MR) elements. A thermally conductive stud is incorporated in an underlayer of the head, below the bottom shield of the MR element. This stud acts as a heat sink, and enhances the heat flow from the bottom shield to the substrate to thereby reduce thermal contact noise in the device, as well as allowing use of higher bias currents when reading signals from the media.

The present invention provides a motor-controlling device for controlling the motor which is driving the closing and opening components. The device comprises: a many-points connecting condition relay circuit connected with the motor and transforming according to the operation component, the switching component connected with the relay circuit; the measuring circuit for determining the velocity of the motor and exporting the measuring signal; the controlling circuit connected with the said switching component and the said determining circuit; the controlling circuit produces charge signal relative to the burden rate of the said determining signal waveform of the said determining circuit, and offer the charge signal to the said switching component, controlling the drive of the motor according to the determining signals. The contacting noise of the switching components can be reduced by use of this device when fully open and close.

A conveyor system including a suppressing device which moves to a position below a driving sprocket to suppress hanging down of a chain moving in a direction opposite a conveying direction. The suppressing device includes: a pair of supporting plates respectively formed by a flat part and a curved part, and arranged to freely move vertically with a fixed point with a return-side guide as its supporting point; a pair of guiding rollers respectively provided at a diagonally lower position of the driving sprocket at a downstream end of the conveying direction to sandwich the curved part with a pair of right and left slat rollers turned downward from the sprocket; and a position adjusting member for suppressing the rotation of the guiding roller involved in the diagonally downward movement of the curved part which is caused by the slat roller, and adjusting the downward movement of the supporting plate.

The invention discloses a check valve and an air conditioner having the same, especially discloses a check valve capable of preventing the rotation of the plunger inside the check valve and reducing the check valve of the working noise and an air conditioner having the same. The check valve according to the invention includes a housing formed with a channel, a plunger which can provided on the channel movable in advance and retreat and forms at least one flank part on the lateral surface, a base opened and closed based on the end at one side of the plunger, a stop piece for limiting the advance and retreat moving of the plunger. The housing includes at least one spline hump, the spline hump is formed by projecting from the inner wall of the housing, to prevent the rotation of the plunger. And noise dropping hump formed by projecting to the stop piece is provided on the other end of the plunger.

The invention provides a spring guide and a cushion device with good absorption characteristic capable of effectively suppressing the resonance vibration of a coil spring in the cushion device and effectively preventing the vibration generated by the noise of the coil spring. The approximately cylindrical spring guide is arranged between the coil spring and an outer shaft member. The coil spring houses a shaft portion of a damper set and arranged between the outer shaft member and an inner shaft member. In the damper set, the inner shaft member is fitted in the cylindrical outer shaft member slidably in an axial direction of the spring guide. Projecting portions projecting towards the shaft core direction are arranged on one end and another end of a main body . The invention also provided the cushion device with the spring guide. The vibration of the coil spring is effectively suppressed.

A power transmitting toothed belt having improved positioning accuracy between the toothed belt and a pulley, increased durability, and reduced contact noise, comprising a rubber back layer, a plurality of core wires and a rubber layer having a plurality of belt teeth, wherein the belt teeth are at oblique angle with respect to the direction of the width of the belt. The belt teeth intersect with straight pulley teeth having a pitch equal to the pitch of the belt teeth.

The invention relates to the technical field of washing machines, in particular to a one-piece motor deceleration clutch of a washing machine, and overcomes the defect of disengaging impact during switching between washing and dewatering working conditions at present. The one-piece motor deceleration clutch comprises an upper clutch component mounted on a motor stator and a clutch slider, the clutch slider which is disengaged and engaged with the upper clutch component is mounted on a clutch shaft and is in axial sliding connection, a clutch spring is arranged between the clutch slider and the motor stator, and a rotor clutch hole disengaged and engaged with the clutch slider is formed in a motor rotor. The one-piece motor deceleration clutch is characterized in that a clutch rotating shaft is arranged on the clutch slider which is connected with a clutch shifting lever through the clutch rotating shaft, and the clutch shifting lever is connected with a traction motor through a traction line; a traction line sleeve is sleeved on the traction line and mounted on the motor stator; a traction spring is arranged between the traction line and the traction motor; a damping rubber ring is arranged on a surface, contacting with the motor rotor, on the clutch slider. A different washing and dewatering switching control mode is provided; impact force during disengaging is decreased, and noise is reduced.

A final reduction gear device including an orthogonal axis gear and a speed reduction mechanism portion employing a planetary gear is provided. A radial bearing, more specifically a cylindrical roller bearing, having a large radial load capacity is disposed between a bevel ring gear of the orthogonal axis gear and a differential case. A thrust bearing, more specifically a thrust ball bearing or a thrust roller bearing, having a large axial load capacity is disposed between an axial end portion of a sun gear, and an inner race side of the radial bearing and the side of a fitting portion of the differential case, to which the inner race is fitted. A thrust bearing, more specifically a thrust ball bearing or a thrust roller bearing, having a large axial load capacity is disposed between the bevel ring gear and a planetary carrier of the speed reduction mechanism portion.

A pneumatic brake booster with short actuating travel, comprising a skirt and a pneumatic piston that are rigidly connected and slideably mounted in a sealed casing to delimit a low-pressure chamber and a variable-pressure chamber and a three-way valve arrangement that is controlled by a control rod connected at a first end to a brake pedal. The three-way valve arrangement having first and second valve seats and a valve that is applied to at least one of the first and second valve seats by a valve spring. The second valve seat being borne by a first longitudinal end of a plunger distributor while the first valve seat is borne by a first longitudinal end of a bushing slideably mounted in a sealed manner in the pneumatic piston over a defined first travel and beyond the defined travel the bushing is secured axially to the pneumatic piston.

A passenger distinguishing apparatus is provided. The passenger distinguishing apparatus includes: a weight detection sensor that is assembled in a vehicle seat to detect a passenger's weight; and a first bracket and a second bracket that assemble the weight detection sensor in the seat, wherein the weight detection sensor has a length direction in a horizontal direction of the seat, and a first damper for absorbing assembling tolerance of the weight detection sensor is disposed between the first bracket and the weight detection sensor. Therefore, assembling tolerance can be absorbed with minimum parts, production can be improved, contact noise can be reduced, and a weight and cost can be reduced.

The invention discloses a biological-body-surface weak-electric-signal collecting and exciting control system.A flexible PCB is used as an electrode detecting array of a substrate at a front end, and the front end is connected with a controllable channel selector through a shielding cable, and is further connected with a single-chip microcomputer control system.A signal control end comprises a signal front-end input photocoupling amplifying module, a low-pass filtering module, a single-chip microcomputer control module, an output amplifying module, an externally-connected storage module and an input keyboard, and the single-chip microcomputer control module is connected with the storage module through a serial port.As electrode array points are scanned, controlling over the states of all the electrode points is achieved, and therefore efficient measuring of the electrode array is achieved.

A novel-structure electric piano keyboard comprises parts like black keys, white keys and a chassis. The white keys and the black keys are mounted on the chassis through a front rail, a middle rail and a rear rail, a linkage rod is mounted on a main rail through a linkage shaft frame, a cam is mounted on the main rail through a cam shaft frame, an adjusting button is mounted on the main rail through a crab claw, the main rail is mounted on a support, the upper rail and the lower rail are respectively mounted on the support to limit movement positions of a counterweight hammer handle and a counterweight hammer within a range below the upper rail and above the lower rail, the upper end of an ejector rod is abutted against the cam, a hook and the counterweight hammer handle are fixedly mounted on the cam, the hook contacts with ejector rod skin both before and after the keyboard moves, and the hook breaks away from the ejector rod skin in the movement process of the keyboard; the counterweight hammer handle is fixedly connected with the counterweight hammer, and when the black keys or the white keys are strummed to lower to the bottom, the hook mounted on the cam contacts with the ejector rod skin mounted on the ejector rod to stop return movement of the cam so as to prepare for next stressed movement of keys; when fingers of a player leave the keys, the hook can push the ejector rod back to an original position to enable keyboard structure to quickly restore to an original position.

The invention discloses a transmission device between the rotor of a permanent magnet synchronous motor and a working component. The transmission device includes a shaft sleeve which is connected with a rotor shaft, a starting tendon which protrudes out of the side wall of the pipe-shaped main body of the shaft sleeve, a working component with a holding cavity for holding the shaft sleeve, a first limit tendon which protrudes out of the inner wall of the holding cavity of the working component, and a shock absorption block which is held in the holding cavity, wherein, an anti-collision gap isarranged between the top face of the starting tendon and the top face of the first limit tendon so as to prevent the starting tendon from colliding or fractionating the first limit tendon when the shaft sleeve rotates along with the rotor shaft. The device has the technical effect of large free stroke of the shaft sleeve, thus having good low-voltage starting performance.

The invention discloses folding type electronic equipment, belongs to the technical field of communication, and aims to solve the problems of contact abnormal sound and abrasion gaps generated by folding of the electronic equipment. The folding type electronic equipment comprises a first screen, a second screen and a pin shaft, wherein hinge holes are respectively formed in the first screen and the second screen, the plurality of hinge holes are formed in the first screen, the plurality of hinge holes are coaxially formed in the second screen, and the hinge holes are matched with the pin shaftin an inserted mode so that the first screen and the second screen can rotate relatively; a first magnet is arranged in each hinge hole, second magnets are arranged on the pin shaft, and the first magnets correspond to the second magnets in the radial direction of the hinge holes. According to the folding type electronic equipment, under the action of magnetic attraction force or magnetic repulsion force, the pin shaft is stressed in a balanced mode, and then the probability of contact abrasion generated between the two screens can be reduced.

A wire brush for a slipring includes a contact section, from which a stabilizer arm is extending backwards towards the brush block of the slipring. The stabilizer arm holds a friction section, which is in friction contact with the contact section at a friction contact area. Such contact, in operation, generates internal friction within the brush when the brush is moved and, therefore, suppresses oscillations of the brush.

A furniture hinge mounted between a furniture wall and a furniture door so as to be used as an opening and closing mechanism of the furniture door, in which, by using the movement part provided on the body part of the furniture hinge and the adjustment part provided at the movement path of the movement part, the entire length of the furniture hinge is changed by advancing and returning the movement part in the opening and closing process of the furniture door such that, since the furniture wall and the furniture door do not come into contact with each other even though the furniture door is completely opened, the peeling damage to the exterior of the furniture is prevented and contact noise is eliminated, thereby improving the satisfaction of consumers.

The invention provides a cutting device for cattle corrected grain sofa leather, belonging to the field of mechanical technology. The problem of low stability of the prior art is solved. The cutting device for cattle corrected grain sofa leather comprises a rack, a drive member, a fixed knife and a movable knife, wherein the fixed knife is connected with the rack; the drive member is fixedly connected with the rack and connected with the movable knife; when the drive member drives the movable knife to move up and down, the movable knife can contact with the fixed knife, and a cutting position for cutting leather is formed; an oblique cutting face is arranged at the end part of the movable knife; an elastic buffer structure is arranged between the fixed knife and the rack; and under the effect of the elastic buffer structure, the fixed knife tends to go below the cutting face. The device has high stability.

The various embodiments of the present invention disclose a stand-alone, scalable cardiac health monitoring device for 1-6-12 lead ECG data acquisition and a method of working thereof. The method of monitoring cardiac health condition of a patient comprises of receiving, by a cardiac monitoring device, an electrocardiograph (ECG) input data signals from at least two electrodes attached to the patient, performing, a quality check on acquiring the ECG input data signals, processing the acquired ECG input data signals, encrypting the processed ECG input data signals and transmitting the encrypted ECG signals to one or more external user devices over a wireless communication interface. The acquiring the ECG input data signals comprises of integrating a closed loop Right Leg Drive (RLD) as a shield drive and a cable / electrode shield to reduce noise coupling to the ECG input data signals.

The invention discloses a proportional electromagnetic gas valve. One end of a thread connector (5) is fixedly connected with a valve sleeve (7); a valve nozzle (6) is connected to one end of the valve sleeve (7); both the threaded connector (5) and the valve nozzle (6) are located at the same end of the valve sleeve (7); the valve nozzle (6) is provided with a radial through hole (8) and an axial through hole (9) communicated with the valve sleeve (7), and the radial through hole (8) is communicated with the axial through hole (9); an armature (3) is slidably fitted in the valve sleeve (7); one end of the armature (3) may be abutted to an inner end of the axial through hole (9) for sealing, and an elastic return device is disposed between the other end of the armature (3) and an electromagnetic iron stop (2); the electromagnetic iron stop (2) is connected to the other end of the valve sleeve (7); a shell (4) sleeves the valve sleeve (7) and is fixedly connected with the valve sleeve (7); an electromagnetic coil (1) is disposed between the valve sleeve (7) and the shell (4). The proportional electromagnetic gas valve is good in sealing performance.