499 results about "Magnetic line" patented technology

The invention relates to the technical field of transformers, and particularly discloses a small-size and strong-short-circuit-current-resistant transformer, which comprises a transformer body, the transformer body comprises an iron core, a plurality of iron cores, a plurality of short-circuit-current-resistant coils, a plurality of short-circuit-current-resistant coils and a plurality of short-circuit-current-resistant coils, the insulating cylinder is arranged on the outer side of the core column in a sleeving manner; the winding sleeves the outer side of the insulating cylinder, the winding comprises a circular coil wound on the outer wall of the insulating cylinder and a plurality of layers of elliptical coils wound on the outer side of the circular coil, and the trend of the elliptical coils is parallel to magnetic lines generated by the circular coil; heat dissipation channels parallel to the axis of the core column are formed between the circular coils and the oval coils and between every two adjacent oval coils. The space of the core column can be effectively utilized, the elliptical ring can fill the external space, the magnetic field trend of the outer elliptical coil is parallel to that of the inner circular coil, high-frequency loss caused by the proximity effect and eddy-current loss during short circuit can be effectively reduced, and the normal operation efficiency and short-circuit endurance capacity of the transformer are improved.

The invention relates to the technical field of light sources, particularly discloses a method and a device for adjusting the central position of a plasma, and aims to realize accurate positioning and stable control of the plasma by accurately controlling output parameters of a magnetic field generator. According to the method, a magnetic field generator with a specific shape and distribution is utilized, a magnetic field with a closed magnetic line structure is generated in a plasma chamber, charged particles in plasma are guided to move along a preset path, and it can be ensured that the plasma reaches and is kept at an expected position by monitoring and adjusting magnetic field parameters in real time.

The utility model discloses a magnetic leveling device of a pendulum bob type laser demarcation device, which comprises a hanging bracket and a pendulum body hung in the hanging bracket, a magnetic damping body consisting of a plurality of magnets is arranged on the hanging bracket according to a Halbach array, and a magnetic field which is made of non-magnetic conductive materials and can cut magnetic lines in a magnetic field generated by the magnetic damping body is arranged on the pendulum body. The utility model aims to provide a damping piece which adopts two different forms of Halbach arrays to generate magnetic damping, and compared with the existing common magnet arrangement scheme, the magnetic flux is obviously enhanced, so that a stronger magnetic damping effect is generated, and the magnetic damping effect is improved. The magnetic leveling device can effectively prevent the swinging body from swinging excessively, so that the leveling time is effectively shortened, the leveling speed and precision of the laser demarcation device are further improved, and the working efficiency is remarkably improved.

A magnetic field propulsion unit generates a drive force when being arranged in an external magnetic field. The magnetic field propulsion unit includes a support structure, a magnetic field generating device attached to the support structure and configured to generate a first magnetic field, an energy supply unit, and a control unit. The energy supply unit provides the magnetic field generating device with electrical energy. The control unit controls the energy supply unit so that the energy supply unit supplies energy to the magnetic field generating device. The control unit supplies varying current to the magnetic field generating device. The magnetic field generating device has a central axis and is arranged in the external magnetic field such that the central axis is inclined with respect to magnetic field lines of the external magnetic field at an angle different from 0°, 90°, 180°, and 270°.

To provide a magnetic therapeutic device capable of suppressing alignment disorder of a magnetic line.SOLUTION: A magnetic bracelet 10 as a band-shaped magnetic therapeutic device in which multiple magnet pieces 11, 12 are connected in a rosary shape in multiple columns includes a first magnet piece 11 having a large magnetic line strength and a second magnet piece 12 having a small magnetic line strength. One or two second magnetic pieces 12 are arranged between the first magnetic pieces 11 in a rosary shape connection direction of each column, and the first magnetic piece 11 and the second magnetic piece 12 are adjacent to each other among the respective columns of the band shape in a lateral width direction.SELECTED DRAWING: Figure 2B

The invention belongs to the field of oil and gas exploitation, geothermal exploitation and deep ground engineering, and discloses an oil and gas shaft crack plugging pressure repair material and method based on microwave heating bismuth-based alloy, the material comprises 74%-86% of bismuth-based alloy powder, 10%-15% of Fe3O4-SiO2 core-shell magnetic particles, 3%-8% of a microwave sensitizer and 1%-3% of a wetting agent. The repairing material is conveyed to the position, where shaft crack plugging repairing needs to be conducted, in the oil and gas shaft, then the repairing material is melted in a microwave heating mode, then the melted alloy is filled in shaft crack plugging, and then a rotating gradient magnetic field is used for repairing the oil and gas shaft crack. And the liquid alloy is driven to directionally migrate to a target crack area along the magnetic line, and after alloy liquid is cooled and solidified, pressure repairing of the oil and gas shaft crack plugging target position is achieved. Precise positioning, efficient filling, phase change control and complete recovery of the repairing material can be achieved in the extremely deep environment, and therefore the high-quality repairing requirement for oil and gas shaft crack plugging pressure repairing achieved through efficient liquefaction of plugging metal can be met.

The invention discloses a vacuum arc extinguish chamber structure with large rated current and strong breaking capacity, which comprises a structure body, and is characterized in that the structure body comprises a static contact assembly, the static contact assembly comprises a static end arc contact and a static end main contact, and the static end arc contact is arranged in front of the static end main contact and protrudes for a preset distance d along the on-off direction; and the moving contact assembly comprises a moving end main contact and a moving end arc contact, and the moving end main contact and the moving end arc contact are located on the same plane. According to the invention, the effect that the main contact does not burn arc during breaking is realized, the contact surface of the main contact is protected from being ablated by the arc, and a physical foundation is laid for the high capacity of the vacuum arc-extinguishing chamber. The moving end arc contact is provided with a coil structure so as to generate a transverse magnetic field or a longitudinal magnetic field, and the magnetic lines of force between the static end arc contact and the moving end arc contact have the combined action of the longitudinal magnetic field and the transverse magnetic field, so that the breaking capacity is high.

The invention provides a rotor punching sheet, a rotor iron core, a rotor, a motor and an air conditioner, the rotor punching sheet is provided with more than two magnetic pole forming areas corresponding to rotor magnetic poles, and each magnetic pole forming area is internally provided with a magnetic steel groove which is arranged on a q axis and extends along the radial direction; the rotor punching sheet is provided with a first magnetic barrier groove located on the d axis between every two adjacent magnetic steel grooves. Wherein first magnetic bridges are formed between the first magnetic barrier grooves and the adjacent magnetic steel grooves on the two sides, and the width of each first magnetic bridge is gradually increased in the radial outward direction of the rotor punching sheet. According to the technical scheme of the invention, the magnetic lines of force can be gradually drawn close to the d axis from the two sides of the d axis, and the sinusoidal property of the magnetic flux in the air gap is better, so that the torque pulsation of the tangential motor can be reduced.

The utility model provides a novel self-power-generating wheel body structure with a shaft wheel rotating synchronously without differential speed, which relates to the technical field of power-generating wheels and comprises a fixed part and a rotatable part which are arranged in a coupling mode. The rotatable part comprises a wheel, and a connecting component is arranged in the rotatable part; the connecting component is provided with a mounting position for mounting a power part; the power part is driven by a power source to generate torque, and then the rotatable part is driven to rotate relative to the fixed part with an axis as the center. A magnetic ring and a generator core which are correspondingly used are arranged at the joint of the fixed part and the rotatable part; the rotatable part rotates relative to the fixed part, so that the generator core and the magnetic ring rotate relative to each other to cut magnetic lines of force to generate current. The self-generating wheel body has the beneficial effects that the blank of the self-generating wheel body in the existing market is filled, the self-generating wheel body can be applied to a wheel body which is represented by a child tricycle and is positioned on a front fork, and the wheel body is driven to rotate through pedal rotation so as to synchronously generate electricity or emit light.

A transport system 10C has a configuration to move a transport body 500 in conjunction with movement of a moving body 200 by using repulsion based on a magnetic force applied between moving body magnets 213 and a transport body magnet 523 when there is a proximal positional relation between these magnets. The transport system 10C includes a control coil 903 that controls a traveling state of the moving body 200, and a coil drive control unit that drives and controls the control coil. The control coil 903 is configured to apply a magnetic force to the moving body magnets 213. The coil drive control unit supplies the control coil 903 with power to cause the control coil 903 to attract the moving body magnets 213 against an air flow flowing within an air blowing tube 100 in order to control and prevent the moving body 200 from traveling.

The invention relates to a low-harmonic permanent magnet synchronous motor rotor punching sheet and a motor rotor, and relates to the technical field of permanent magnet synchronous motors. According to the scheme, the rotor punching sheet is provided with the first magnetic steel groove and the second magnetic steel groove which form a V shape and are symmetrical about the D axis of the motor rotor, and the opening of the V shape faces the outer circumferential wall of the rotor punching sheet body. According to the structure, the distribution of a motor rotor magnetic field is improved, the magnetic field is more uniform, the salient pole rate is higher, the weak magnetic speed expansion capability is stronger, the structural strength is better, the harmonic content is lower, and the sine property of the magnetic field can be improved. On the outer circumferential wall of the rotor punching sheet body, a first auxiliary groove is formed between the first magnetic isolation bridge and the second magnetic isolation bridge and close to the first magnetic isolation bridge, and a second auxiliary groove is formed between the second magnetic isolation bridge and the D shaft and close to the second magnetic isolation bridge. On the premise of ensuring the mechanical strength of the magnetic isolation bridge, the magnetic line direction is changed, the magnetic leakage is reduced, the air gap flux density waveform is improved, the harmonic content is reduced, and the torque ripple and electromagnetic noise are reduced.

The invention provides an oblique coil electromagnetic classificator for separating weak magnetic impurities from strong magnetic concentrate, which comprises a separation cylinder, an ore feeding device and a flushing device, an ore feeding pipe of the ore feeding device extends into the separation cylinder from the top end of the separation cylinder, the flushing device is arranged below the ore feeding pipe, and an oblique coil is arranged on the outer side of the separation cylinder, so that the weak magnetic impurities can be separated from the strong magnetic concentrate. Magnetic lines of force are obliquely distributed, magnetic linkages formed by magnetic particles are oblique, the whole magnetic linkages can be efficiently impacted in cooperation with vertical component force Fz of water flow of the flushing device, and scattering of magnetic aggregates is facilitated; the tail control flat coil and the concentrate gathering flat coil at the upper end and the lower end effectively control tailings and concentrates respectively, so that the separation efficiency of strong magnetic concentrates and weak magnetic impurities is improved, for example, in the iron-titanium separation operation of vanadium titano-magnetite ore dressing, ilmenite mixed into iron ore concentrates can be reduced, the grade of the iron ore concentrates can be improved, and titanium metal resources can be fully recycled.

The invention discloses an ultrasonic abrasive flow surface texture machining device and method based on an auxiliary magnetic field, and belongs to the field of precision machining and surface engineering. The ultrasonic abrasive flow surface texture machining device comprises a workbench, an ultrasonic vibration generating device, a magnetic field generating device, an abrasive flow machining system and a three-dimensional motion platform. The composite abrasive particle suspension is composed of a basic solution, carbonyl iron powder magnetic particles and silicon carbide abrasive particles. According to the method, magnetic particles are guided by a magnetic field to form a chain along magnetic lines of force, ultrasonic high-frequency impact is combined, abrasive materials are driven to impact the surface of a workpiece in order, a submicron texture with the consistent direction and the uniform size is formed, the depth ranges from 0.2 micrometer to 2 micrometers, and the width ranges from 1 micrometer to 20 micrometers. Texture parameters are flexibly regulated and controlled through magnetic field and ultrasonic parameters, and the method has the advantages of being high in machining precision, high in controllability, low in cost, environmentally friendly and recyclable, is suitable for precise parts of bearings and cutters, and can remarkably improve the tribological performance and wettability of the parts.

A plasma confinement device comprising an arrangement of electromagnetic coils on the faces of a polyhedron with alternating polarity. Each coil is connected to a coil of opposing polarity via a lobe comprising a loop of more electromagnetic coils. The lobe coils connect the field lines such that the entire configuration has only closed field lines. The coils of each lobe are graded in size, such that the field lines converge to their densest at the apex of the lobe. In the central region plasma is confined by magnetic mirror reflection from the converging field lines in the lobes and stabilised by the convexity of the field lines between coils. The device may form the basis of a magnetically confined thermonuclear fusion reactor.

The invention discloses a Helmholtz coil material lightning magnetic field shielding performance measuring device, which comprises a magnetic field generation device, a shielding test box is arranged in a magnetic field coverage range of the magnetic field generation device, an open hole is formed in the shielding test box, and the open hole enables a magnetic line of force of the magnetic field generation device to transversely penetrate through the shielding test box. The shielding test box is internally provided with the signal measurement unit, the signal measurement unit measures the magnetic field in the shielding test box, the lightning stroke magnetic field environment is accurately simulated, and the repeatability and accuracy of the shielding performance test are improved. The invention further discloses a method for measuring the lightning magnetic field shielding performance of the Helmholtz coil material, the lightning magnetic field shielding performance of the measured shielding material is measured by applying the device for measuring the lightning magnetic field shielding performance of the Helmholtz coil material, and the problem that traditional measurement is poor in accuracy is effectively solved.

This disclosure provides an X-ray imaging device and a wireless power transmission device with electromagnetic shielding. The wireless power transmission device includes: a first annular structure, on which a first frame is fixed, and a first winding is wound; a second annular structure, on which a second frame is fixed, and a second winding is wound; wherein the second annular structure is rotatable relative to the first annular structure; and a metal shielding assembly disposed relative to the first winding and / or the second winding, the metal shielding assembly being used to generate a reverse magnetic field based on the eddy current effect to weaken the main magnetic flux of the wireless power transmission device. This disclosure utilizes the reverse magnetic field generated by the metal shielding assembly based on the eddy current effect to weaken the main magnetic flux of the wireless power transmission device, thereby reducing magnetic field leakage and thus reducing electromagnetic interference of the wireless power transmission device.

The present application relates to a kind of Cherenkov oscillator using composite fine adjustment magnetic field, the present application includes oscillator cavity and the composite fine adjustment magnetic field being arranged outside oscillator cavity, composite fine adjustment magnetic field includes positive solenoid external magnetic field and fine adjustment magnetic field system, fine adjustment magnetic field system is located between positive solenoid external magnetic field and oscillator cavity, fine adjustment magnetic field system includes first positive solenoid fine adjustment magnetic field, second positive solenoid fine adjustment magnetic field and negative solenoid fine adjustment magnetic field, oscillator cavity includes extraction cavity, extraction cavity is arranged with negative solenoid fine adjustment magnetic field outside, negative solenoid fine adjustment magnetic field is arranged with first positive solenoid fine adjustment magnetic field and second positive solenoid fine adjustment magnetic field outside respectively, the present application uses composite hetero solenoid magnetic field combination magnetic field model in magnetic field design and optimally designs, changes magnetic force line configuration, in turn changes electron beam running track.This kind of design guarantees the distance between electron beam and outer cavity, while using local magnetic field to change electron beam configuration method reduces the distance between electron beam and extraction cavity, improves microwave extraction efficiency.

Provided are a magnetic line sensor capable of inexpensively suppressing noise due to vibrations from outside the magnetic line sensor, a sheet recognition unit, and a sheet handling device. The magnetic line sensor is in a multi-channel system and detects magnetic information of a transported sheet. The magnetic line sensor includes multiple magnetic sensor elements each provided for a corresponding channel and arranged in a main scanning direction, multiple chip ceramic capacitors each electrically connected to a corresponding one of the multiple magnetic sensor elements and each having a pair of external electrodes, and a substrate on which the chip ceramic capacitors are mounted. At least one of the chip ceramic capacitors has its pair of external electrodes aligned in a direction orthogonal to the main scanning direction.

According to one embodiment, a magnetic memory includes first magnetic members extending in a first direction, first wirings extending in a second direction and spaced from each other in a third direction, and a second magnetic member. The second magnetic member has a first portion above the first wirings, a second portion extending in the second direction between adjacent first wirings, a third portion below the plurality of first wirings, and a fourth portion with a part inside an upper end portion of a first magnetic member. A third wiring extends in the third direction and is connected to lower end portions of first magnetic members.

The utility model discloses a magnetic stirrer with a constant temperature function, and relates to the technical field of analytical instruments, in particular to the magnetic stirrer with the constant temperature function. The device comprises a shell, an ultrathin magnetic coil, a support frame, a power switch, an adjusting knob, a control circuit and a constant temperature device, the even number of the ultrathin magnetic coils is 6-12, and the ultrathin magnetic coils are uniformly distributed at the position, close to the upper wall, of the upper part in the stirrer shell by taking the center of the stirrer shell as a circle center and are fixed through a support frame and bolts; constant temperature devices are arranged at the center and the outer side of the ultrathin magnetic coil; and the control circuit is arranged in the stirrer shell and is respectively connected with the ultrathin magnetic coil, the constant temperature device, and a power switch and an adjusting knob which are arranged on the outer side of the front wall of the stirrer shell. According to the technical scheme, the problems that the temperature of a to-be-stirred sample cannot be accurately controlled due to the fact that the internal temperature of a stirrer in the prior art cannot be controlled, and the stirrer is large in size and heavy in weight due to the fact that a magnetic coil structure is large are solved.

A Hall signal output device for a mouse scroll wheel. The Hall signal output device comprises an encoder fixing bracket disposed inside a mouse, an encoder scroll wheel rotationally arranged inside the encoder fixing bracket, a magnetic ring disposed inside the encoder scroll wheel, and a Hall encoder disposed on a side edge of the encoder fixing bracket and directly facing the magnetic ring. When being rotated, the encoder scroll wheel drives the magnetic ring to rotate, thereby changing the direction of magnetic field lines of the magnetic ring; and then, after detecting the change in the magnetic field lines of the magnetic ring, the Hall encoder generates a pulse signal and outputs same. The Hall signal output device for a mouse scroll wheel has a simple structure, involves a low production cost, high precision and a high response speed, and meets the usage requirements of contemporary people.

A solid-core ring-magnet having one or more cavities is provided. The magnet can have an overall cylindrical shape or a rectangular-prism shape. In either case, a portion of cavity walls of the magnet are ring shaped, causing the magnetic field lines to emanate from the magnet so that the bead formation is in the shape of a ring. A bead separation magnet having a discontinuous or segmented cavity wall is also provided. The segmented cavity wall causes bead formation to form in a segmented or gapped ring to allow for easier manual pipetting. Also provided are systems and kits having the inventive magnets. Methods of purifying a macromolecule using the inventive magnets are also provided.

The utility model discloses a high-speed serial bus transmission circuit, which comprises a main control circuit, and the main control circuit comprises an FPGA (field programmable gate array), a CLKIO (clock line input / output), a DATAIO (data address input / output) and an LTC2879XMS8E chip. An acquisition node circuit, wherein the acquisition node circuit comprises an FPGA (Field Programmable Gate Array), a CLKIO, a DATAIO and an LTC2879XMS8E chip; and a level conversion circuit, wherein the level conversion circuit comprises a resistor and an LTC2879XMS8E chip. According to the utility model, the circuit structure design is optimized, through the arrangement of the master control circuit, the acquisition node circuit and the level conversion circuit, the communication between one master control and a plurality of acquisition nodes is realized, the acquisition nodes are distinguished by different addresses, the communication efficiency is high, the external common-mode noise can be completely counteracted, and the reliability is high. Signals are transmitted in a differential mode, the anti-interference capacity of communication is improved, the structural design that the two sets of shielding twisted pairs are combined is adopted, the two wires are close to each other and equal in signal amplitude, the amplitudes of coupling electromagnetic fields between the two wires and the ground wire are also equal, the signal polarities of the two wires and the ground wire are opposite, and according to the right-hand spiral rule, the signal polarities of the two wires are different. The magnetic lines of force are mutually offset, and the anti-electromagnetic interference capability is strong.

The invention discloses a frequency mixing bias magnetic nanoparticle magnetization sensing distance measurement method and device, belongs to the technical field of magnetic sensing detection, and solves the problems that the distribution density of magnetic lines is quickly reduced along with the increase of spatial distance, and the concentration information is inaccurately restored under the condition that the distance is unknown in the prior art. According to the frequency mixing bias magnetic nanoparticle magnetization sensing distance measurement method and device, on the premise that a large number of coils are not additionally arranged, the space distribution of an excitation magnetic field near a sensor, the nonlinear magnetization characteristics of a superparamagnetic signal, the magnetization response distance and direction of a superparamagnetic particle and the like are analyzed in detail; the one-dimensional chromatography detection in the lymph node detection direction is innovatively realized, the depth and concentration information of the tracer agent can be synchronously detected and restored, and the detection accuracy of the sentinel lymph node magnetic sensitive detection technology is greatly enhanced.

A method for manufacturing monocrystalline silicon for growing monocrystalline silicon while a horizontal magnetic field is applied to a silicon melt, using a monocrystalline silicon manufacturing apparatus comprising a crucible and a heating device having a hollow cylindrical shape surrounding the crucible. The heating device comprises a first and a second heat-generating section, both having a hollow semi-cylindrical shape and the same heat-generating characteristics. The heating device is arranged such that when the heat-generating sections produce heat with different heat-generating quantities, the heating quantities of the first and second sections of the crucible are different. The first and second sections are arranged on either side across a vertical virtual plane that includes a central axis of the crucible and a central magnetic field line of the horizontal magnetic field.The process involves performing a first heating and generation cycle while the heat generation sections produce heat with the same heat generation quantity, and a second heating and generation cycle while the heat generation sections produce heat with different heat generation quantities.

The utility model belongs to the technical field of generators, and particularly relates to an anti-interference magnetic generator, which comprises a composite shell, a high magnet is fixedly connected onto the inner wall of the composite shell, a stator coil is wound on the high magnet to form a stator, a rotating shaft is rotatably inserted into the composite shell, a connecting block is arranged on the rotating shaft, and the connecting block is connected with the high magnet. A rotor is fixedly connected to the connecting block, and rotating holes distributed circumferentially are formed in the rotor; and the composite shell sequentially comprises a high-permeability layer, an electromagnetic shielding layer, a structural layer and a coating from inside to outside. According to the utility model, through the multilayer structure of the composite housing, the high magnetic conductivity layer guiding magnetic lines, the electromagnetic shielding layer and the coating layer resisting interference, the structure layer providing support protection, the neodymium iron boron permanent magnet providing a stable magnetic field, and the cooperation of the stator coil and the rotor, efficient power generation is realized, and the design improves the power generation efficiency and the stability of output voltage. And the system can work stably in a complex electromagnetic environment.

The invention relates to a planar magnetic integration converter suitable for a distributed photovoltaic matrix transformer ISOP, which aims at a transformer module in LLC topology, adopts an ISOP matrix transformer planar integration method, and integrates and applies a plurality of transformer units into a unified four-column magnetic core. Adjacent magnetic columns have opposite magnetic induction directions through a specific winding mode, so that the magnetic flux density of a magnetic core plane is uniformly distributed by utilizing a magnetic line cancellation method, the maximum peak value is reduced to 1 / 2 of that of a traditional discrete transformer scheme, and low-voltage power supply is provided for a control chip through an auxiliary winding. And the four magnetic columns are wound in parallel, so that the customized high transformation ratio can be conveniently realized, the magnetic field consistency of each magnetic column transformer unit is ensured, finally, the planar magnetic integrated converter device of the matrix transformer ISOP is formed, and the better EMI characteristic is realized.

The invention discloses a low-temperature vacuum annular electron accelerator arc reactor, which relates to the field of electromagnetism and is applied to the technology and concept of energy generation, conversion and transmission. The device is composed of a high-voltage electron gun module (1), a low-temperature vacuum annular pipe module (2), a sealing module (3), an accelerating electric field module (4), a magnet guiding module (5), a magnetic core module (6), an induction coil output module (7) and a base module (8). According to the technology and the concept, a low-temperature vacuum annular electron accelerator is used for replacing a primary coil winding of a traditional transformer, that is, the same electric field is used for circularly accelerating electrons emitted into an annular vacuum tube by an electron gun to form annular electron flow to replace the primary coil winding of the traditional transformer. When the high-speed circling electrons lose to accelerate the action of an electric field, due to the mass inertia effect of the high-speed electrons, the annular current cannot disappear immediately under the guidance of the magnetic lines of force of the fixed magnet, the magnetic flux of the magnetic core still changes, and therefore the secondary coil can still obtain corresponding arc discharge. Therefore, the inductive discharge of the secondary coil can reversely act on the energy conversion of the accelerating electric field or the electron gun, so that the energy conversion efficiency is improved, and the energy loss is reduced.

A fixing apparatus to fix a toner image on a recording material includes a heating unit, a pressure member, a support member, a pressing mechanism, and an insulating member. The heating unit includes a heating member having a conductive layer, a coil having a helical structure portion having a helical axis substantially parallel to a longitudinal direction of the heating member, and a core to induce magnetic lines of force of an alternating magnetic field generated by the coil. The pressure member is in contact with a heating member outer circumferential surface and forms a nip portion between the pressure member and the heating member. The insulating member electrically interrupts a conductive path to prevent formation of the conductive path that is in a loop-shape surrounding the coil and passing through the support member and the pressing mechanism when viewed in an axial direction of the helical axis.

The invention provides a UTG diaphragm loudspeaker comprising a magnetic assembly used for generating magnetic lines of force; the vibrating diaphragm comprises UTG glass, and the thickness of the vibrating diaphragm ranges from 0.01 mm to 0.1 mm; and the voice coil is configured corresponding to the vibrating diaphragm and is matched with the magnetic assembly to generate driving force to push the vibrating diaphragm to vibrate, and the thickness of the vibrating diaphragm is as thin as 0.01 mm.