75results about How to "Large amplitude" patented technology

The invention relates to the technical field of piezoelectric pumps, in particular to a piezoelectric fluid pump which comprises a fluid excitation unit and at least one opposed plate. The fluid excitation unit is provided with a piezoelectric plate, a substrate, a spacing part and a diaphragm, and the piezoelectric plate and the substrate form an actuator; a pump cavity is formed between the opposed plate and the diaphragm; at least two hole parts communicated with the pump cavity penetrate through the area, opposite to the diaphragm, of the opposite plate, the hole parts are inlets or outlets, at least one hole part is an inlet, the other hole part is an outlet, and at least one hole part is provided with a one-way valve; according to the piezoelectric fluid pump, the diaphragm serves as an excitation source for exciting the fluid in the pump cavity to generate pressure variation, the diaphragm is fixedly connected with the actuator through the spacing part, under the structure, the diaphragm can generate vibration displacement which is several times or even dozens of times that of the actuator due to extremely small vibration displacement of the actuator, and therefore the vibration displacement of the diaphragm is greatly reduced. And the volume variation of the pump cavity during working can be greatly improved, so that the output flow is greatly improved.

The invention relates to the technical field of bridge accessory structures, and provides a power generation device using bridge vibration and a bridge, the power generation device comprises a first piezoelectric part and a second piezoelectric part, the first piezoelectric part and the second piezoelectric part are both located in a cavity of a bridge body, and the first piezoelectric part and the second piezoelectric part are arranged in the cavity. One side of the first piezoelectric component is connected with one side of the second piezoelectric component, the other side of the first piezoelectric component is connected to the side wall through a first elastic component, and the other side of the second piezoelectric component is connected to the side wall through a second elastic component. The deformation directions of the first elastic component and the second elastic component are parallel to each other, the second piezoelectric component is compressed when the first piezoelectric component is stretched, and the second piezoelectric component is stretched when the first piezoelectric component is compressed. The device can generate power through vibration generated by the bridge, the power generation efficiency can be improved, and the continuity and stability of power generation are guaranteed.

The invention discloses an ultrasonic vibration cutting tool, and belongs to the technical field of ultrasonic vibration machining. The cutter assembly comprises a first clamping flange, a second clamping flange, a cutter and an ultrasonic vibrator, and the two clamping flanges and the cutter are fixedly connected and form an ultrasonic vibrator mounting part for accommodating the ultrasonic vibrator; a conducting layer and an insulating layer are arranged between the ultrasonic vibrator and the two clamping flanges, after the cutter is tightly fixed on the cutter holder by the fixing nut, the cutter is matched with the conducting layer to form an ultrasonic vibrator grounding end circuit, and the other side of the ultrasonic vibrator abuts against the power supply ejector pin; a cylindrical mounting part is arranged on the first clamping flange and provided with a conical matching hole matched with the conical mounting part of the tool apron, a plurality of Z-shaped elastic connecting sets are formed between the cylindrical mounting part and the conical matching hole, the design of through holes in special shapes has obvious buffering and vibration isolation effects, and the tool is divided into a mounting part and a vibration part during working. During assembly, the fixing nut is only in contact with the mounting part, so that the inhibition effect of mounting factors on the amplitude of the ultrasonic cutting knife is greatly weakened, and the cutting efficiency and quality are improved.

The utility model belongs to the technical field of medical instrument cleaning and disinfection, and particularly relates to a special medical ultrasonic cleaning transducer which comprises a transducer body, the transducer body comprises a tube body, the tube body is provided with a hollow liquid storage cavity, a liquid inlet and a liquid outlet, and the liquid inlet and the liquid outlet are communicated with the liquid storage cavity. The liquid inlet is used for sucking a cleaning solution, the liquid outlet is used for spraying out the sucked cleaning solution, and a circulating device used for circulating the cleaning solution is connected between the liquid inlet and the liquid outlet; the tube body is provided with a front cover plate, the front cover plate is formed on the outer side of the tube body, and the front end of the front cover plate is sequentially sleeved with a first piezoelectric assembly, a second piezoelectric assembly and a rear cover plate, a circulating device is arranged between the liquid outlet and the liquid inlet, so that circulating cleaning is realized, and the cleaning effect is effectively improved; the transducer is simple in structure, easy to manufacture and maintain, high in power, large in amplitude and high in cleaning and disinfection speed; and the problem of cross contamination of various medical instruments is effectively avoided.

The present invention relates to the technical field of piezoelectric pumps, and in particular to a piezoelectric fluid pump, comprising a fluid excitation unit and at least one opposing plate; the fluid excitation unit comprises a piezoelectric sheet, a substrate, a spacer and a diaphragm, and the piezoelectric sheet and the substrate constitute an actuator; a pump chamber is formed between the opposing plate and the diaphragm; at least two holes connected to the pump chamber are penetrated in the area of ​​the opposing plate opposite to the diaphragm, and the holes are inlets or outlets, wherein at least one hole is an inlet, and another at least one hole is an outlet, and at least one hole is provided with a one-way valve; the piezoelectric fluid pump of the present invention uses a diaphragm as an excitation source for exciting the fluid in the pump chamber to produce pressure changes, and the diaphragm is fixedly connected to the actuator through the spacer. Under this structure, the extremely small vibration displacement of the actuator can cause the diaphragm to produce several times or even dozens of times the vibration displacement of the actuator, thereby greatly improving the volume change of the pump chamber during operation, thereby greatly improving the output flow rate.

A double-beam konghou includes a resonance box of an arc-shaped hollow box, the box of the resonance box is mainly composed of a first upper sound board, a second upper sound board and a lower sound board, and the cross section of the box is a semicircular hollow cavity, characterized in that: double beams are fixedly arranged in parallel on the inner walls of the first upper sound board, the second upper sound board and the lower sound board; transverse and longitudinal grooves are opened on the inner walls of the first upper sound board, the second upper sound board and the lower sound board to form a sound tunnel; and a transverse beam is arranged in the transverse direction of the resonance box. This solution solves the problems that the high pitch area is not bright when playing the konghou in the past, the bass area is not thick and round enough, and the sound penetration is not strong.

The utility model relates to the technical field of poultry breeding, in particular to an astragalus membranaceus poultry breeding pulverizing machine which comprises a crushing barrel, an installation frame is connected to the outer side of the crushing barrel, a supporting frame is arranged at the bottom end of the installation frame, a discharging assembly is arranged at the bottom end of the crushing barrel, a discharging pipe is arranged at the bottom end of the discharging assembly, and a knocking assembly is installed on the inner side of the installation frame. The knocking assembly conducts knocking vibration discharging on the discharging assembly. The feeding barrel is arranged at the top end of the crushing barrel, a rotary adjusting assembly is installed on the top wall of the feeding barrel, and linkage cutting assemblies are connected to the left side and the right side of the feeding barrel correspondingly; the rotary adjusting assembly and the linkage cutting assembly are linked to fully cut and crush, the discharging assembly is knocked in order, powder stagnated in the side wall moves, and blocking is avoided; and the rotation adjusting assembly is arranged to be matched with the linkage cutting assembly for linkage, rotation in two different directions is completed through one rotating power, smashing is conducted after cutting, and the smashing effect is improved.

The application provides a longitudinal-bending coupled vibration ultrasonic scalpel head based on an acoustic black hole, a scalpel and a design method, and belongs to the technical field of medical instruments.The ultrasonic scalpel head comprises, in sequence from the head to the tail, an ultrasonic scalpel head head part, an ultrasonic scalpel head back part, an ultrasonic scalpel head tail part and an ultrasonic scalpel head arc blade part; and the arc structure of the ultrasonic scalpel head arc blade part satisfies a one-dimensional acoustic black hole cross-section height calculation model.The longitudinal-bending coupled vibration mode provides longitudinal shearing force and transverse shearing force for the ultrasonic scalpel head at the same time, the focusing effect of the acoustic black hole structure is utilized to further enhance the mechanical vibration capacity of the ultrasonic scalpel head, and the cutting time of the ultrasonic scalpel head in surgery can be greatly shortened, so that the work efficiency is greatly improved.

The present invention discloses a kind of quick coal conveying equipment for power plant, which belongs to the field of conveying technology, and comprises a machine platform and a conveying mechanism, wherein the conveying mechanism comprises a first electric roller shaft and a conveyor belt, and the two conveyor belts are both mounted on the machine platform and connected through the conveyor belt transmission, and further comprises: a crushing mechanism for crushing coal blocks; a sieve plate mechanism for screening the coal blocks crushed by the crushing mechanism; and a driving assembly for driving the sieve plate mechanism for screening; wherein the crushing mechanism comprises a crushing box, a second electric roller shaft, a crushing roller, a slider and a first linear moving part, and the two second electric roller shafts are respectively mounted on the crushing box and the slider, and the slider is slidably matched with the machine platform, and the first linear moving part is detachably mounted on the machine platform and its output shaft is fixedly connected to the slider; the present invention can quickly crush and convey coal.

The utility model discloses a vibrating type traditional Chinese medicinal material digging shovel which comprises a bucket, an installation plate is fixedly installed on the outer surface of the bucket, two pin shaft installation holes are formed in the surface of the installation plate, detachable shovel teeth are installed on the lower surface of the bucket, a soil leakage window is formed in the bottom of the bucket, and a leakage net plate is movably installed in the soil leakage window. A hydraulic motor is fixedly installed outside the bucket and drives the screen plate to vibrate, an eccentric wheel is fixedly installed on a rotating shaft of the hydraulic motor, a connecting pin is fixedly installed at the end of the eccentric wheel, a transmission arm is rotationally installed on the surface of the connecting pin, and the transmission arm is rotationally connected with the screen plate. According to the digging shovel, the soil leakage window is formed in the bottom of the bucket, the movable leakage net plate is arranged in the soil leakage window, the hydraulic motor drives the leakage net plate to vibrate in a reciprocating mode in the operation process, soil blocks in the bucket are vibrated to be broken, medicinal materials are screened out, and therefore the vibration soil breaking and screening effects are achieved, convenience is provided for mechanical medicinal material digging, and the working efficiency is improved.

A non-equidistant zigzag coil electromagnetic ultrasonic transducer comprises a magnet, a test piece and a coil, wherein the coil comprises 9 non-equidistant wires, the 9 wires are numbered from left to right according to Arabic numerals, the spacing between the wires with odd numbers is fixed, and the spacing between the wires with even numbers is not fixed, and the arrangement of the 9 non-equidistant wires is defined as: removing the wires with odd numbers of the equidistant zigzag coil electromagnetic ultrasonic transducer, retaining the wires with even numbers as wires 1, 3, 5, and 7, adding four wires at four points where the horizontal magnetic field and the vertical magnetic field of the equidistant zigzag coil electromagnetic ultrasonic transducer intersect, as wires 2, 4, 6, and 8, adding a wire below the end of the last magnet, as wire 9, and the current direction of wires 1, 2, 5, 6, and 9 is opposite to the current direction of wires 3, 4, 7, and 8. The Rayleigh wave and Lamb wave amplitudes generated by the invention are large, and the energy conversion efficiency is high.

The invention discloses a sound production unit, which comprises a basin stand, a magnetic circuit assembly, an inner voice coil, an outer voice coil, a diaphragm assembly and a centering disk, and is characterized in that the magnetic circuit assembly is connected with the basin stand and comprises a yoke, and a central magnetic structure and an edge magnetic structure which are respectively arranged on the yoke; the central magnetic structure comprises lower central magnetic steel, a central washer, upper central magnetic steel and an upper magnetic conductive cover which are sequentially connected from bottom to top, the upper magnetic conductive cover comprises a body and a surrounding wall arranged along the edge of the body, and a first gap is formed between the surrounding wall and the upper central magnetic structure; the yoke is provided with a plurality of bosses, the plurality of bosses are arranged around the lower center magnetic steel, a second gap is formed between the bosses and the lower center magnetic steel, and the first gap and the second gap are communicated to form an inner side magnetic gap; the edge magnetic structure is arranged on the outer side of the boss, and an outer side magnetic gap is formed between the edge magnetic structure and the boss; the vibrating diaphragm assembly is connected with the basin frame, the upper magnetic conductive cover and the outer voice coil; the centering disk is connected with the inner voice coil, the outer voice coil and the frame. The sounding unit is novel in structure, thin in thickness and high in performance.

The invention relates to an audio signal processing method and device, terminal equipment and a storage medium. The method comprises the steps that a first audio signal is acquired through a first acquisition unit of the terminal equipment, and a second audio signal is acquired through a second acquisition unit of the terminal equipment; the distance difference between the first acquisition unit and the first sound source and the distance difference between the second acquisition unit and the first sound source are within a first range; the distance difference between the first acquisition unit and the second acquisition unit and the second sound source is greater than the maximum value of the first range, and the first sound source is a target acquisition object; superposing the first audio signal and the second audio signal in a time domain to obtain a superposed audio signal; and filtering the noise audio signal with the amplitude smaller than a preset value in the superposed audio signal to obtain a target audio signal of the target collection object. The interference of the sound emitted by the sound source on the required sound is reduced, the required audio signal is obtained, the noise is reduced, and the quality of the audio signal is improved.

The utility model provides a panel assembly with a resonance soundboard and a plucked instrument, relates to the technical field of plucked instruments, and solves the technical problem that a panel structure is difficult to increase the volume of a guitar on the premise of ensuring the structural strength. The panel assembly comprises a panel body, a resonance soundboard and a vibration transmission piece, the resonance soundboard is located between the panel body and a back plate of the plucked instrument, the outer edge of the resonance soundboard is fixedly connected with a side plate of the plucked instrument, and the vibration transmission piece is fixedly connected with the panel body and the resonance soundboard and used for transmitting vibration of the panel body to the resonance soundboard; the vibration of the panel body is transmitted to the resonance soundboard through the vibration transmission piece, the resonance soundboard resonates, and the vibration transmitted by the panel body is amplified by the resonance soundboard to generate larger amplitude, so that the volume of the plucked instrument can be increased. And due to the existence of the resonance soundboard, the thickness of the panel body does not need to be excessively reduced, and the structural strength of the panel body is prevented from being influenced.

The invention provides a desktop projection type display, which is characterized in that a plurality of sounders are fixed on one side, far away from a QWP quarter-wave plate, of a spectroscope, and a first substrate layer is fixed at the bottom of each sounder; the sounder comprises a first electrode layer, a piezoelectric layer arranged below the first electrode layer and an insulating layer arranged below the piezoelectric layer, a cylindrical opening is formed in the bottom of the insulating layer, a second electrode layer is arranged in the cylindrical opening, and the insulating layer is flush with the bottom of the second electrode layer; a bearing layer, a connecting layer and a second substrate layer are sequentially arranged below the second electrode layer and the insulating layer, a vibration cavity is formed in the second substrate layer in a penetrating mode, the vibration cavity is cylindrical, the vibration cavity corresponds to the second electrode layer, the overall size of the device can be reduced, and the sound production effect is improved.

The invention discloses a sound production device and electronic equipment, and relates to the technical field of electroacoustic transduction, and the sound production device comprises a housing, a magnetic circuit system, a vibration system and a supporting member. The vibrating system comprises a vibrating diaphragm, a framework, a voice coil and a centering disk, the vibrating diaphragm is connected with the shell and the framework, the voice coil is connected with the framework and corresponds to a magnetic gap of the magnetic circuit system, the centering disk is connected with the framework and the shell, the framework comprises a body part and a conductive layer, the centering disk is provided with a conductive part, and the conductive part and a lead part of the voice coil are electrically connected with the conductive layer respectively; the framework is provided with a first magnetic attraction part, the supporting piece is provided with a second magnetic attraction part located on the side, opposite to the magnetic circuit system, of the vibrating diaphragm, first attraction force exists between the first magnetic attraction part and the second magnetic attraction part, second attraction force exists between the first magnetic attraction part and the magnetic circuit system, and in the non-working state, the vibrating system is located at the balance position under the action of the first attraction force and the second attraction force. According to the technical scheme, the low-frequency effect and the acoustic performance of the sound production device can be improved.

The invention relates to the technical field of drilling machines, in particular to a radial drilling machine for zinc-aluminum-silicon-magnesium-chromium alloy machining, which comprises an L-shaped rocker arm and a spindle box mounted on the L-shaped rocker arm, the spindle box is matched with the L-shaped rocker arm to adjust the drilling position, and a rotatable assembled drill bit is mounted on the lower portion of the spindle box. An axial flow channel and a forking flow channel are formed in the assembled drill bit; the forking runner directly sprays the gas-liquid mixed medium, and compared with an external cutting fluid spraying mode in the traditional technology, the gas-liquid mixed medium can directly reach the end of the drill bit and take away cutting powder.

This invention provides an electronic device comprising a housing, a hard disk, at least one fan, and at least one vibration damping structure. The hard disk is disposed within the housing. At least one fan is disposed within the housing. At least one vibration damping structure is located between the hard disk and the at least one fan, and includes an elastic element and a mass block. The elastic element includes a mounting portion, a supporting portion, and a swinging portion. The mounting portion is disposed within the housing. The opposite ends of the supporting portion are respectively connected to the mounting portion and the swinging portion. The mounting portion and the swinging portion are located on the same side of the supporting portion. The swinging portion is oscillating relative to the supporting portion and the mounting portion. The mass block is disposed within the swinging portion. The solution provided by this invention enables the vibration damping structure to achieve both low assembly cost and effective vibration damping.

This invention discloses a method for unsteady-state ultrasonic standing wave-assisted control of fusion welding. It utilizes dual ultrasonic transducers to perform dual-wave interference, forming an ultrasonic standing wave. This ultrasonic standing wave is introduced into the fusion welding process, and its action on the welding area allows for real-time control of the microstructure and properties of different parts of the weld joint. This forms a unsteady-state ultrasonic standing wave with controlled directional movement of the wave packet nodes, which is then used to regulate the microstructure and properties of the weld joint. This invention enables control over the direction and speed of movement of the unsteady-state ultrasonic standing wave wave packet nodes, allowing for regional control of the microstructure and properties of different parts of the weld joint, resulting in a more uniform joint composition and microstructure. It can solve problems such as undercut, burn-through, high residual stress, severe deformation, and columnar crystals that reduce joint performance during the welding of thin materials or fine wires, refining grains and improving joint performance. It can achieve controllable connections from the centimeter scale to the micrometer scale.

The utility model discloses a high-performance micro-flat magnetic horn, which comprises a shell and a front cover with a sound outlet hole, the front cover covers the shell, a diaphragm is arranged in a cavity formed by the shell and the front cover, a voice coil is adhered to the bottom of the diaphragm, an outer magnet and an inner magnet arranged in the center of the outer magnet are mounted in the shell, an outer washer is adhered to the top of the outer magnet, and an inner washer is adhered to the bottom of the outer washer. The top of the inner magnet is bonded with the inner washer, a copper ring of the diaphragm is arranged between the shell and the front cover and located on a platform of the shell, the top of the outer magnet is flush with the platform of the shell, the outer washer is arranged in the copper ring, and the copper ring and the outer washer share the same circle center. According to the utility model, the sizes of the diaphragm copper ring, the inner magnet, the outer magnet, the inner washer and the outer washer are optimally designed and reasonably arranged, so that the thickness of the loudspeaker is not increased while the performance of the loudspeaker is improved, and the application range is wider.

The invention belongs to the technical field of material conveying, and particularly relates to a novel vibrating feeder which comprises a working mass and a driving mass, the working mass comprises a conveying groove body used for conveying materials, a fixed mounting seat used for supporting the conveying groove body is arranged below the conveying groove body, and the conveying groove body is mounted on the fixed mounting seat through a plurality of damping parts; the driving mass comprises a supporting base and a driver installed on the supporting base, the supporting base is arranged below the conveying groove body, and a plurality of sets of elastic assemblies are arranged between the conveying groove body and the supporting base. The driver is in a static state and does not vibrate along with the conveying groove body, vibration damage can be reduced, the service life is prolonged, the amplitude of the conveying groove body can be properly increased, the mass of a balance weight on the fixed mounting base can be reduced, and the manufacturing cost and the operation cost of the whole equipment are reduced.

The invention relates to application of a water-soluble tomato concentrate in preparation of a composition capable of regulating biological rhythm. Researches find that the water-soluble tomato concentrate can improve the expression of a core gene Per2 of a biological rhythm and other rhythm core genes including Bmal1, Clock1, Cry1, Cry2, Per1, Rev-erba and Rora, can obviously increase the amplitude of the biological rhythm, and can prevent and / or improve sleep disorders, so that the water-soluble tomato concentrate can play a good role in improving sleep quality or regulating the biological rhythm, and can be used for preparing a health-care product. The composition can be used for preparing the composition for regulating the biological rhythm or improving the sleep quality.

This invention discloses an automatic correction and feeding mechanism for a flexible vibratory feeder, belonging to the field of vibratory feeding technology. It includes a fixed box, a vibratory feeder seat above the fixed box, a feed tray on the top surface of the vibratory feeder seat, and a camera assembly on one side above the feed tray. It also includes a flexible vibration assembly, comprising a connecting seat fixedly connected to the bottom surface inside the fixed box, an eccentric vibration motor fixedly connected to the top of the connecting seat, and one end of the output shaft of the eccentric vibration motor fixedly connected to the center of the bottom of the vibratory feeder seat. In this invention, a single eccentric vibration motor combined with four sets of obliquely symmetrical elastic support structures decomposes the rotational excitation force output by the motor into two orthogonal simple harmonic vibration components in the X and Y directions. The two components are superimposed to synthesize a stable and controllable horizontal elliptical motion trajectory. This trajectory causes the pins inside the feed tray to produce continuous, low-impact flexible sliding under the action of friction and inertia, preventing deformation, bending, or peeling of the surface coating of the parts.

The present invention discloses a vibration mechanism, a receiver and a receiver assembly method. The receiver of the present invention comprises: a shell having an inner cavity formed therein; a sound film mechanism; a vibration mechanism, the vibration mechanism comprising an electromagnet unit and a permanent magnet; the electromagnet and the vibration plate are provided with matching fixing units, and the electromagnet unit and the vibration plate are fixedly connected through the fixing units. In the receiver of the present invention, the connection structure between the armature and the vibration plate is stable, avoiding the problem of sound distortion.

The invention discloses a dyeing and weaving cloth wastewater transportation treatment vehicle, which belongs to the technical field of dyeing and weaving cloth equipment, and is technically characterized by comprising a transportation vehicle, a storage box is mounted on the transportation vehicle, and a tank body is rotatably connected in the storage box; the precipitation treatment assembly is mounted on the support frame on the side surface of the storage box; the sliding assembly is slidably connected to the surface of the precipitation treatment assembly; the separation assembly is connected in the tank body in a sliding manner; and the pressing assembly is slidably connected to the supporting frame. By increasing the rotating speed of the precipitation treatment assembly, the separation assembly in the tank body can rotate under the action of the sliding assembly and the precipitation treatment assembly, so that sediments on the surface of the separation assembly can be thrown out of the tank body, and automatic collection of the sediments on the surface of the separation assembly is realized. In the process, the dyed and woven fabric wastewater can be discharged in time through the separation assembly, so that the loading capacity of the dyed and woven fabric wastewater sediment transported by the storage box is increased, the back-and-forth transportation of a transport vehicle is reduced, and the cost of an enterprise is reduced.

The invention relates to the technical field of optical detection, in particular to a flour quality detection method and system based on optical analysis. The method comprises the following steps: firstly, acquiring a Raman spectrum image corresponding to each local detection area of a flour sample by utilizing a Raman spectrometer comprising a plurality of intelligent sensors; according to the morphological distribution characteristics of the to-be-analyzed fluctuation peak in the Raman spectrum image and the overlap ratio of the to-be-analyzed fluctuation peak and the preset frequency shift standard range corresponding to each flour component, acquiring a component fluctuation peak and a flour component corresponding to the component fluctuation peak; according to the impurity possibility degree of the component fluctuation peaks, impurity fluctuation peaks are screened out from the component fluctuation peaks; and obtaining the flour quality of the flour sample according to the overall level condition and the difference condition of the impurity measurement corresponding to all the local detection areas of the flour sample. By deeply analyzing the characteristics of the fluctuation peaks corresponding to the impurities in the flour, the fluctuation peaks corresponding to the impurities are more accurately detected, and the flour quality detection effect is improved.

The invention discloses a novel mechanical arm grabbing arm structure, which relates to the technical field of mechanical arms, and comprises a mechanical arm body arranged on a workshop ground rail in a sliding manner and an execution part connected with a mechanical arm body rotating arm, the execution part comprises a mounting seat which is arranged on a rotating arm of the manipulator body so as to enable the mounting seat to rotate when the manipulator body performs action switching; the clamping part is arranged on the first mounting surface of the mounting seat and is used for feeding the friction material in the material rack into a hot press mold; the paving part is arranged on the second mounting surface of the mounting seat and is used for paving the friction material in the hot press mold; and the adsorption part is arranged on the third mounting surface of the mounting seat and is used for taking the formed brake pad in the hot press mold. Integrated arrangement is adopted, a plurality of actions in the process that the three manipulators need to be matched and coordinated are omitted, action conversion and execution among all the parts are faster, the production and machining efficiency of brake pads is greatly improved, cost is saved, and occupied space is reduced.

The invention provides a loudspeaker and electronic equipment, the loudspeaker comprises a fixed support, a driving assembly and two vibrating pieces arranged at intervals in a first direction, the two vibrating pieces are installed on the fixed support, and the driving assembly is arranged between the two vibrating pieces. The two vibrating pieces can be driven by the driving assembly to vibrate in the same or opposite directions in the first direction relative to the fixing support. The driving assembly comprises a voice coil, the voice coil is arranged between the two vibration pieces in the first direction and connected with the two vibration pieces, and the voice coil can vibrate relative to the fixed support in the first direction and can drive the two vibration pieces to vibrate. The loudspeaker provided by the invention can realize larger amplitude in the electronic equipment, and has higher efficiency.

The utility model relates to a kind of driving device for the blade assembly installation of laser cutter mould, comprising: several pull plates, are fixed to the bottom of blade assembly according to interval, the two sides of the pull plate are respectively provided with corresponding clamping portion outside convex;Blade pulling mechanism includes workbench, the workbench can be lifted and is provided with several groups of corresponding clamping plate of the pull plate, the protruding portion that the clamping plate is respectively provided with clamping to the clamping portion on the pull plate, and the clamping plate is connected to the output shaft end of corresponding lifting drive mechanism by corresponding link plate;Ultrasonic transducer, fixedly installed on the link plate;Clamping plate limiting assembly, after the same group of clamping plate clamping to the clamping portion of corresponding pull plate, the clamping plate limiting assembly is fixed to the same group of clamping plate.The utility model can quickly install the blade assembly of laser cutter mould, and can effectively ensure that blade assembly does not appear the situation that cutting edge is damaged in assembly process.

The utility model discloses a double magnetic circuit structure of ultrathin woofer, including shell, magnetic member, voice coil, damper and cone, the magnetic member includes first magnet and second magnet, first magnet is provided at one end portion of shell, second magnet is coaxially sleeved with first magnet inner side and is fixedly connected with first magnet, and the cone is provided with the first magnet. One end portion of the voice coil extends between the first magnet and the second magnet. The inner side and the outer side of the voice coil are respectively provided with one magnet, double magnetic circuits can be formed in the same loudspeaker space, compared with a conventional single magnet, the double-magnetic-circuit loudspeaker can generate larger magnetic field intensity when acting with the voice coil under the same condition, larger ampere force is formed to act on the voice coil, the cone is driven to generate larger amplitude, the sound loudness is improved, and the sound quality is improved. And the magnetic field can be relatively more uniform and stable through the washer, so that the fidelity of sound is improved to the greatest extent, and the sound effect quality of the loudspeaker is improved.