182 results about "Magnet" patented technology

The invention herein relates to a removable cover piece for belt buckle which is devised in two parts: a buckle head and a cover piece where the buckle head has a recessed trap precisely dimensioned to receive the cover piece. A nail grip is devised at the open end of the recessed trap so that the multi-functional cover piece inlayed in the trap can easily be gripped, removed or replaced with another cover piece. Upon the recessed trap contact faces are several magnet elements to meet the opposing magnet elements on the cover piece in order to secure the cover piece into the recessed trap. The present invention also features two slide guides at the base of recessed trap contact faces in response to the slide edges on the base of the cover pieces to form a track fitting assembly relationship, further securing the multi-functional cover pieces.

The present invention relates to an automatic shredder without choosing the number of paper to be shredded which comprises a shredder core and an automatic paper feeding device, the automatic paper feeding device comprises a driving mechanism, a paper support box, a pick-up mechanism and a paper press box, the driving mechanism is fixed on the shredder core and connected with the pick-up mechanism for driving the pick-up mechanism, the paper support box comprises a first zone and a second zone, the pick-up mechanism is positioned between the first zone and the second zone and fixed to the paper support box, and its paper feeding direction is towards the second zone, one end of the paper press box is pivoted with the paper support box, the other end of the paper press box is connected detachable with the paper support box, the paper support box is fixed on the shredder core, and the second zone has a paper inlet positioned above the blade assembly of the shredder core, a magnet is positioned in the first zone, the automatic shredder further comprises an elastic paper press and retaining device mounted inside the paper press box and extending to the first zone, the magnet corresponds to the elastic paper press and retaining device, so the present invention can deal with a very large amount of paper to be shredded at one time, has a simple and convenient operation, is designed dexterously, and has a concise structure and a economical cost.

A screw positioning sleeve assembly capable of quickly connecting a locking tool comprises an inner sleeve slideably received in an outer sleeve, and the moving distance of the outer sleeve varies with the depth of the locking groove, so that the inner sleeve can be engaged with an ordinary tool rod or a screwdriver to screw or unscrew a screw. When screwing or unscrewing, a magnet in the outer sleeve can attract the screw. During the screwing and unscrewing process, the positioning sleeve can move towards the screw to make the magnet keep attracting the screw, thus preventing the screw from screwing or unscrewing falling off. It is noted that the rod body of the tool rod or the screwdriver can connect with the screw positioning sleeve assembly without any additional preformed structure. Therefore, the scope of applicability of the screw positioning sleeve assembly is enlarged considerably.

Disclosed in the present invention is a tandem starter-generator construction that includes an induction motor-generator, a permanent magnet motor-generator and power transmission unit disposed adjacent to the motor-generators. The induction motor-generator is utilized predominantly as a motor to provide mechanical power at relatively high efficiency as a motor, and as a generator to provide electrical power during regenerative braking. The permanent magnet motor-generator is used predominantly as a generator for very high efficiency power conversion and to capture additional electrical power during regenerative braking to compensates for the regenerative energy captured at lower efficiency by the induction motor-generator. Accordingly, the tandem motor-generator construction disclosed herein overcomes the drawbacks of low efficiency of an induction motor-generator operating in regenerative mode and a permanent magnet motor-generator magnetic drag losses during periods of non-utilization at high speeds in order to improve fuel efficiency of a parallel hybrid vehicle.

In a method of manufacturing a self-start synchronous motor for preventing deterioration of permanent magnets used in a rotor, and also for enhancing the efficiency of the self-start synchronous motor, the self-start synchronous motor comprising a stator having a stator core and windings wound around the stator core, and a rotor having an outer diameter slightly smaller than an inner diameter of the stator and arranged inside of the stator. The rotor is provided with a rotor core, a plurality of conductor bars embedded in the outer peripheral portion of the rotor core over an entire periphery thereof, end rings provided on opposite end sides of the conductor bars and constituting a squirrel cage conductor in cooperation with the conductor bars, and a plurality of permanent magnets embedded in the rotor core and arranged at a position inner than that of an inner peripheral surface of the conductor bars. Further, the conductor bars and the end rings are electrically and mechanically joined together through frictional agitation joint.

In a method to control the movement of an endoscopy capsule in a hollow organ of a patient using a magnet system, a movement signal of the endoscopy capsule in the hollow organ is detected, that represents the time curve of the spatial position. The movement signal is evaluated to identify a periodic signal component thereof, and the frequency of this periodic signal component is identified. The magnet system is operated to exert a force on the endoscopy capsule in the hollow organ that is periodic with the frequency of the periodic signal component, and that is directed opposite to the movement signal.

The invention relates to a coupler, and discloses a double-edge structure speed regulating permanent magnet coupler for solving the problems that in an existing coal mine factory, a high-power induction motor is started in an on-load mode, due to the fact that the starting torque of the induction motor is small, when the starting torque is smaller than the load torque in value, on-load starting can not be achieved in a directly-starting mode, and an adopted controller of the motor is high in price. The double-edge structure speed regulating permanent magnet coupler comprises a driving shaft, an output shaft, a flange with a neck, a release bearing block, a release bearing, a first support, a second support, a first magnetism conducting driving disc, a second magnetism conducting driving disc, an electric conducting metal disc, at least three positioning columns, a plurality of permanent magnets and a plurality of air gap adjustment devices. The first support, the first magnetism conducting driving disc, the second magnetism conducting driving disc and the second support are sequentially arranged in parallel, and the permanent magnets are fixedly installed on the two opposite plate faces of the first magnetism conducting driving disc and the second magnetism conducting driving disc in the circumferential direction of the input shaft. The double-edge structure speed regulating permanent magnet coupler belongs to the technical field of speed regulating coupling driving.

A fabrication process produces markers for a magnetomechanical electronic article surveillance system. The marker includes a magnetomechanical element comprising one or more resonator strips of magnetostrictive amorphous metal alloy; a housing having a cavity sized and shaped to accommodate the resonator strips for free mechanical vibration therewithin; and a bias magnet to magnetically bias the magnetomechanical element. The process employs adaptive control of the cut length of the resonator strips, correction of the length being based on the deviation of the actual marker resonant frequency from a preselected, target marker frequency. Use of adaptive, feedback control advantageously results in a much tighter distribution of actual resonant frequencies. Also provided is a web-fed press for continuously producing such markers with adaptive control of the resonator strip length.

The invention discloses a magnetic nano particle magnetic-induction thermal focusing system based on a complex magnetic field, comprising a device for generating an alternating magnetic field and magnetic nano particles, wherein the device for generating the alternating magnetic field generates the alternating magnetic field; the magnetic nano particles are dispersed in the alternating magnetic field; the magnetic nano particle magnetic-induction thermal focusing system also comprises at least two permanent magnets which are distributed at the two sides of the device for generating the alternating magnetic field, and the same poles are opposite; and the distances from the permanent magnets to the central line of the device generating the alternating magnetic field are approximately equal. In the magnetic nano particle magnetic-induction thermal focusing system, the accurate control of the magnetic nano particle heat effect and selective temperature increasing of local positions in areas dispersed with magnetic nano particles are realized, the cost is lower, and the selective heating on tumor areas can be realized, so that the damage of thermal therapy to the normal tissues is relieved. The magnetic nano particle magnetic-induction thermal focusing system also can be applied in selective heating to areas of chemical reaction systems, so that the purpose of controlling the chemical reaction rate is achieved.

A bolt mechanism that is actuated by an electromagnetic arrangement is provided for use within a pneumatic projectile launcher or marker. The electro-magnetic arrangement provides for rapid movement and a high degree of control over the bolt. Generally, an arrangement of electro-magnetic coils is provided that exert a force on ferrous materials or permanent magnets thereby causing the bolt to reciprocate back and forth. Several embodiments are provided that disclose configurations having varied numbers of electromagnetic coils, ferrous materials and permanent magnets strategically placed within the breech and bolt of the marker, wherein energizing the coils produces movement of the bolt. Further, the electro-magnetic bolt system of the present invention is equally applicable to slide bolts as well as rotary bolts.

A rotational angle detection device enables rotational angle detection for rotational angles ranging from 0° to 360° with an extremely simple configuration. The rotational angle detection device includes: a rotating magnet 12, which is mounted on one end of a rotating shaft 11; a four-pole auxiliary magnet 14, which is mounted on a substrate 13 opposed to the rotating magnet 12 without contact; and a magnetic sensor 15, which is mounted on the opposite side of the substrate 13. The four-pole auxiliary magnet 14 converts one rotating magnetic field of 0° to 360° provided by the rotating magnet 12 in a region where the magnetic sensor 15 is positioned into another rotating magnetic field of 0° to 180°.

A method of determining an angle by an encoder includes generating a first angle data based on a rotation of a bipolar magnet and a second angle data based on a rotation of the multipolar magnet; determining a first waveform signal based on the first angle data and a second waveform signal based on the second angle data; converting the first waveform signal into a third waveform signal having a cycle similar to the second waveform signal; calculating an angle result value as a function of the second angle data and a determined value about a location of a rotation cycle of the multipolar magnet based on a difference between the second waveform signal and the third waveform signal; and determining an absolute angle corresponding to the calculated angle result value based on stored angle data.

The invention discloses a high-pixel mini-typed optical automatic focusing system driven to focus by electromagnetic force, comprising a base; the technical key point of the system is that the base comprises a drawtube used for guiding; the chamber of the drawtube is internally provided with a lens seat which can move upwards and downwards along the drawtube; the lens seat is enwound by a plurality of coil turns; the drawtube is internally provided with a magnet; the lens seat is provided with a recovery spring; the seat can also comprise a bearing seat and an upper cover; the drawtube is sleeved on the bearing seat; the upper cover presses the drawtube and is subsequently connected with the bearing seat; the magnet has four magnetic blocks which are uniformly arranged at four corners of the drawtube. The invention aims at overcoming the shortages that the existing focusing system has low precision, large appearance and restricted photographing distance and providing a system which adopts the electromagnetic force driving and spring elasticity balance type to realize the automatic focusing of the high-pixel lens; the system achieves the action accuracy of the automatic focusing of the lens and the micromation of the automatic focusing system and solves the microspur photographing problem of the lens.

The invention discloses an automobile processing part clamping device with the good fixing performance. The part clamping device comprises a mounting base. Fixed lug seats are welded to the two ends of the two sides of the mounting base. Fixing bolts are connected to the outer walls of the tops of the fixed lug seats through threads. Bearing blocks are connected to the outer walls of the two sidesof the top of the mounting base through bolts. A horizontal lead screw is rotatably connected to the inner walls of the two bearing blocks. A second sliding block is connected to the peripheral wallof the lead screw through threads. The outer wall of the top of the second sliding block is connected with a hydraulic cylinder through bolts. The outer wall of the top of the hydraulic cylinder is connected with a mounting block through bolts. The outer wall of one side of the mounting block is connected with a servo motor through bolts. According to the part clamping device, a stepping motor isstarted, two first sliding blocks are driven to move to the middle to clamp a part through a first thread and a second thread with the opposite thread directions on the lead screw; the first sliding blocks are provided with magnets so that the part can be clamped more stably.

To provide a magnetron sputtering cathode, a magnetron sputtering apparatus, and a method of manufacturing a magnetic device, capable of generating a leakage magnetic field sufficiently large to form a magnetic tunnel necessary for discharge on the surface of a target even when the target is a magnetic body and thick and a ferromagnetic body is used as the target. The magnetron sputtering cathode of the present invention includes a target having a second annular groove provided on the sputtering surface of the target, a third annular projection provided on the non-sputtering surface of the target, a fourth annular groove provided outside the third annular projection on the non-sputtering surface, and a fourth annular projection provided outside the fourth annular groove on the non-sputtering surface. Further, the magnetron sputtering cathode includes a first magnet and a second magnet 6 having a polarity different from that of the first magnet on the non-sputtering surface side.

A rotary electronic component of the present invention has a sealed structure for the upper part of a contact section toward the side of an operating knob. In this structure, a rotor with a lower ring magnet is rotatably disposed on a concavity of a case with an open top. The top of this concavity is sealed with a sheet. An operating member with operating knob provided with an upper ring magnet is disposed on the sheet so that the rotor and the operating member co-rotate by the attractive force between the magnets.

A stripline-style ferrite phase shifter based on LTCC technology belongs to the technology of the short-wave communication device. The whole phase shifter is composed of two-layer rectangle gyromagnetic ferrite substrates clamping two-layer rectangle ceramic dielectric substrates, two paralleled magnetizing current leads and one bending microstrip line used for dephasing are clipped by the two-layer ceramic dielectric substrates; the two sides of the ferrite substrates exceeding the ceramic dielectric substrates in width are communicated with each other and form an enclosed magnetic loop. When the device is working, a ring shape silver electrode on the surface of the ferrite substrates is earthed, the impulse magnetization current is exerted to magnetize the gyromagnetic ferrite loop by the magnetizing current leads, the gyromagnetic ferrite substrates are working in remanence state after getting rid of magnetizing current; microwave signal is connected between the two termination electrodes of the bending microstip lines used for dephasing, and non-reciprocal differential phase shift is generated. Compared with the existing phase shifter, the volume and quality of the phase shifter in the invention can be greatly reduced, which is in favor of realizing the integration of phase shifter, active/passive devices and components.

Disclosed are an electric motor and a simplified variable speed drive system which renders the use of filtering components in a motor drive circuit unnecessary and increases torque transfer from permanent magnets of the rotor to the output shaft. The motor includes a fluid gap between the rotor and the stator configured to receive a cooling fluid, such a refrigerant. A plurality of radially-abutting, bread loaf-shaped magnets having a flat base are respectively fixed to a plurality of longitudinally oriented mounting facets provided on the shaft to provide maximum torque transfer from the magnets to the shaft. An eddy shield disposed between the faceted shaft and the magnets thermally shunts high frequency harmonics from the magnets to the shaft and cooling fluid. The rotor components are mechanically secured by a sleeve disposed around the rotor.

The invention relates to a permanent-magnetic-ferrite production method and permanent magnetic ferrite, which belongs to the field of magnets. The invention solves the technical problem that the prior art is low in the utilization value of permanent magnetic ferrite recycled material and incapable of recycling permanent magnetic ferrite recycled material to product high-performance permanent magnetic ferrite. The permanent-magnetic-ferrite production method comprises the steps of preparing material, preparing sizing agents, molding, sintering, grinding and washing. A permanent magnetic ferrite product produced by the method has Br more than or equal to 410 mT, Hcb more than or equal to 290 kA/m, Hcj more than or equal to 306 kA/m and BHmax more than or equal to 31.81 J/m, and the performances of the product meet the performance requirements of FB6B series products. The permanent magnetic ferrite can be used for motors, computers and the like of high-grade automobiles, motorcycles and other motor vehicles, and has broad market and application prospects.

A rotor structure for a motor includes a shaft, a single magnet, and two fixing seats. The shaft passes through the single magnet and the two fixing seats, with the two fixing seats being adjacent to and abutting against two end faces of the single magnet, respectively. The single magnet fits with a small clearance or loosely fits the shaft, and the two fixing seats tightly fit the shaft, such that the single magnet is positioned at a predetermined position relative to the shaft without rupture. Furthermore, each of the two end faces and two abutting faces are formed with rough surfaces and/or with corresponding grooves and protrusions, so as to achieve a stable-engaging effect between the single magnet and fixing seats.

The invention discloses a detection sensor based on magnetostriction guide waves. The detection sensor comprises a hollow shell, an annular magnet, a box body and a coil framework, wherein the center of the hollow shell is coaxially sleeved with a guide rod penetrating through the two ends of the hollow shell; the annular magnet is arranged in the shell, coaxially sleeves the guide rod, and is axially fixed through a magnet positioning plug; the box body is fixedly arranged at one end of the guide rod and is axially positioned outside the shell through a pressing nut; an excitation plug and a receiving plug are fixedly mounted on the box body; the coil framework is sleeved with an excitation coil and a receiving coil, and is fixed at the other end, which is located outside the shell, of the guide rod; the excitation coil and the receiving coil sequentially sleeve the periphery of the coil framework and are electrically connected with the excitation plug and the receiving plug, respectively. The invention further discloses a system comprising the detection sensor and an application of the system. According to the invention, a whole heat exchanging pipe can be detected only the coil framework, the excitation coil and the receiving coil stretch into the heat exchanging pipe; a region needing to be washed is reduced to the greatest extent; the detection efficiency of the heat exchanging pipe is improved and the detection precision is high.

The invention discloses a preparation method of a MnZn (Manganese-Zinc) soft magnetic ferrite material containing modified nanoscale titanium dioxide. The preparation method comprises the following steps of: preparing main materials, preparing auxiliary materials, pre-burning, mixing and secondarily ball-milling the main materials and the auxiliary materials, shaping and sintering to obtain a MnZn soft magnetic ferrite magnetic core of modified nanoscale titanium dioxide. Through the addition of the modified nanoscale titanium dioxide, the MnZn soft magnetic ferrite material can play a bridge combination role among different raw materials; the used raw materials have the advantages of better distribution, high density, high grain boundary resistivity, low porosity and great and even grains; the prescription of the raw materials is reasonably improved, so that the magnetic core has higher magnetic conductivity after firing; and the indexes such as power loss, frequency feature, curie temperature, saturation flux density and the like are greatly improved.

The invention discloses an automatic spring leading device of independent bagging spring machine that includes main chain wheel, driven chain wheel, chain rolling on main chain wheel and driven chain wheel, block transferring board that has flute on it, and magnet inlayed in the flute. The invention has simple structure and is suitable to use in bagging machine.

The invention discloses an alternating-current permanent magnet synchronous drainage pump with a built-in closed cooling water tank, which comprises a motor assembly and a pump structure assembly, wherein the motor assembly comprises a rotor assembly and a stator iron core; the pump structure assembly comprises an impeller and a pump body; the pump body is provided with an impeller cavity for accommodating the impeller, a rotor cavity for accommodating a permanent magnet rotor and a water-cooling cavity for accommodating cooling liquid; the stator iron core is arranged between the water-cooling cavity and the rotor cavity; the water-cooling cavity is provided with an inner cavity wall covered outside the stator iron core and an outer cavity wall used as a pump body shell; bottoms of the inner cavity wall and the outer cavity wall extend in the opposite directions to form the bottom of the water-cooling cavity; the water-cooling cavity is provided with an opening and is sealed by a pump body gland; and the impeller cavity is formed in front of the pump body gland. In the alternating-current permanent magnet synchronous drainage pump, the cooling liquid in the cooling water tank and fluid pumped by a water pump are independent, so that the water quality of the external complete machine can be prevented from being polluted due to the prevention of the pollution of impurity scales in the pumped fluid on the pump body. The cooling water tank is formed by the pump shell, has a compact structure, and is convenient to assemble and maintain.

The invention is applicable to the field of brushless motors, and discloses a brushless plastic motor. The brushless plastic motor comprises an injection moulding bottom housing, a rotating shaft, an injection moulding head cover, a stator, a magnet and a tube, wherein the bottom housing comprises a bottom plate part and a convex extending part; an axial through hole is formed in the convex extending part; bearings are arranged in ports of the two ends of the axial through hole in an embedding manner; the rotating shaft is arranged on the bearings in a penetrating manner; the head cover is arranged on the rotating shaft in a sleeving manner; the stator is arranged on the convex extending part of the bottom housing in a sleeving manner; the magnet is arranged on the stator in a sleeving manner; the tube is arranged on the magnet in a sleeving manner; and the head cover is butted with the bottom housing. According to the brushless plastic motor, the bottom housing provided with the convex extending part and the head cover provided with an inner cavity are adopted, the rotating shaft penetrates through the convex extending part of the bottom housing and then is butted with the head cover, the stator, the magnet and the tube are contained in the inner cavity of the head cover, and the bottom housing and the head cover adopt injection moulding and serve as protective housings and mounting carriers of components, so that the structure of the brushless motor is simplified greatly, the processing procedure and the processing time of the brushless motor are reduced greatly, and the production efficiency is improved greatly.

The invention discloses a pair of napier's compasses. The pair of napier's compasses comprises a telescopic adjusting mechanism and a pencil clamp fixing mechanism. The telescopic adjusting mechanism comprises a rotating locking mechanism, a sliding focal length adjusting mechanism and a thread rope locking mechanism, wherein the sliding focal length adjusting mechanism is arranged on the rotating locking mechanism in a sliding mode, the thread rope locking mechanism is fixed on the rotating locking mechanism, and the pencil clamp fixing mechanism is connected to the thread rope locking mechanism. In this way, a continuous curve can be rapidly and accurately drawn up at one time through the pair of napier's compasses, circles and ellipses can be drawn, and multiple purposes of the pair of napier's compasses are achieved; due to the fact that gear drive is adopted, stability and reliability are achieved, and accuracy is high; due to the fact that magnets at the bottom end can attract on a blackboard, labor is saved in the drawing process, drawing can be rapidly conducted, and the pair of napier's compasses is convenient to carry.