28results about How to "Prevent offline" patented technology

The utility model discloses an ultrasonic ceramic chip, an ultrasonic transducer and an ultrasonic beauty instrument. The ultrasonic ceramic chip is provided with a first surface, a second surface and a peripheral surface, wherein the first surface and the second surface are oppositely arranged; the peripheral surface is connected with the first surface and the second surface; the first surface is provided with a positive electrode area, a negative electrode area and a first insulation area for isolating the positive electrode area from the negative electrode area, the positive electrode area is used for connecting a positive electrode of a power supply, and the negative electrode area is used for connecting a negative electrode of the power supply. When the ultrasonic ceramic chip is applied to the ultrasonic transducer, the first surface can be opposite to the output end of the ultrasonic transducer, namely, the positive electrode area and the negative electrode area face inwards, so that a positive wire and a negative wire can be conveniently and respectively conducted with the positive electrode area and the negative electrode area, and the wires do not need to bypass the peripheral wall of the ultrasonic ceramic chip; therefore, the power-on stability of the ultrasonic ceramic chip can be improved, and the operation stability of the ultrasonic transducer can be improved.

The utility model relates to slurry dipping cooling equipment for a lost-wax mold, which comprises a cooling chamber, a cooling device and a cooling device, the cooling chamber comprises a shell, a lagging space is formed in the shell, an air blowing device is arranged on the shell, and air flow in the lagging space is accelerated by the air blowing device; the charging barrel is used for loading mortar; the conveying device comprises a track and a plurality of hanging pieces moving along the track, the track sequentially passes through the charging barrel and the cooling chamber, molds are installed on the hanging pieces, and the molds can enter the charging barrel to be dipped with mortar, move into the lagging space and continuously move in the lagging space; the mold is driven by the lifting part to stretch into the charging barrel, so that the mold is dipped in mortar and moved into the lagging space, the air blowing device blows air to the mortar on the mold, cooling of the mortar is accelerated, meanwhile, secondary dipping and secondary cooling can be carried out according to requirements, products are prevented from being offline, and the production efficiency is improved.

The orthodontic forceps comprise a forceps head and two forceps handles which are symmetrically arranged, the forceps head comprises a left forceps holder and a right forceps holder, an inverted-L-shaped fixing block is arranged on the opposite faces of the left forceps holder and the right forceps holder and close to the top of the left forceps holder and the right forceps holder, and a groove matched with the fixing block is formed in the position, located on the fixing block, in the right forceps holder. The left forceps clip and the right forceps clip are rotationally hinged, the forceps heads are connected with the forceps handles through clamping connection of the connecting blocks on the forceps heads and the arc pieces in the mounting cavities, the rotating blocks are rotated, the arc pieces are connected into the sliding grooves in a sliding mode, and the forceps heads and the forceps handles are fixedly connected; the rotating block is rotated again, the arc piece slides out of the sliding groove, and the tong head is convenient to disassemble and replace. The pair of forceps handles can be matched with a plurality of forceps heads, operation is simple and fast, equipment cost is saved, carrying is convenient, using convenience of a user can be effectively improved, and the situation that orthodontic forceps are high in price and later maintenance cost can be relieved.

The utility model relates to the technical field of wire harness accessories, in particular to a double-guide-roller assembly for wire harness processing, which comprises an upper guide roller and a lower guide roller which are arranged in parallel up and down, end seats and side seats are arranged at two end parts of the upper guide roller and the lower guide roller, and a bottom frame is arranged between the bottoms of the end seats and the side seats; the upper guide roller and the lower guide roller are each provided with a plurality of guide grooves which are evenly arranged at equal intervals, transmission chain wheels are installed at one end of the upper guide roller and one end of the lower guide roller, and the two sets of transmission chain wheels are in transmission connection through a transmission chain. According to the utility model, the upper guide roller and the lower guide roller are arranged in parallel up and down and are respectively provided with a plurality of groups of guide grooves, so that a plurality of groups of wire harnesses can be simultaneously guided and fixed in the up and down directions, and the stability and the precision of wire harness processing are improved; the wire pressing transverse frame parallel to the upper guide roller is installed at the end of the piston rod of the wire pressing adjusting air cylinder, the stability and precision of wire harness machining can be improved, and the wire harness is prevented from deviating or disengaging in the machining process.

The utility model provides a kind of thread cutting mechanism of lock eye machine, belong to sewing machine technical field.It solves the problem that thread hair gathering caused by thread cutting in existing thread cutting mechanism cannot be discharged, leading to normal thread cutting cannot be carried out.The thread cutting mechanism of the lock eye machine, including fixed knife, moving knife and needle plate with pinhole, moving knife has thread hook, moving knife can move forward and backward to make thread hook cooperate with fixed knife to cut thread, the lower surface of needle plate is provided with movable slot, pinhole is arranged on the bottom surface of movable slot, thread hook is located in movable slot, the upper surface of needle plate is provided with fixed slot located in front of pinhole, the rear side and bottom surface of fixed slot are communicated with the wall surface of movable slot and form communicating port, fixed knife is fixedly connected in fixed slot and covers part of communicating port, the rear side of fixed knife and the upper mouth of communicating port are spaced apart, and the front side of fixed knife and the front mouth of communicating port are spaced apart.The thread cutting mechanism makes moving knife not be jammed or even be stuck due to thread hair gathering, so that thread cutting can be carried out normally.

The utility model discloses a one-piece shapewear which comprises a chest binding area, a waist binding area, a crotch area and a back area, the chest binding area, the waist binding area, the crotch area and the back area are connected together according to the structural characteristics of a human body, switch belts are arranged on the two outer sides of the back area, secondary tightening threads are arranged on the inner sides of the switch belts, and the secondary tightening threads are connected with the switch belts. A main compact line is arranged at the central position of the back area; the back area is further provided with a hip lifting area, and a hip lifting line is arranged on the outer edge of the hip lifting area. The body-shaping underwear is good in body-shaping effect, high in air permeability, convenient to put on and take off and capable of better meeting the requirements of consumers.

An unmanned aerial vehicle on-line hoisting structure comprises a stand column, a moving base, a pressing assembly, a linkage assembly, walking wheels, a first driving device, a second driving device, a mounting base, a hoisting arm and a connecting assembly. One end of the stand column is mounted on the inspection robot, a mounting seat is mounted at the other end of the stand column, the traveling wheels are rotatably mounted on the mounting seat, and the second driving device is used for driving the traveling wheels to rotate; one end of the suspension arm is detachably installed on the installation base through a connecting assembly, the other end of the suspension arm is used for being connected with an unmanned aerial vehicle, the connecting assembly is movably installed on the installation base, and the end of the connecting assembly can be installed at one end of the suspension arm. The utility model provides the on-line hoisting structure of the unmanned aerial vehicle according to the content, and solves the problems of long time consumption and low on-line efficiency due to the fact that the on-line hoisting structure in the prior art needs to place the inspection robot, firstly press the inspection robot to prevent the inspection robot from falling off and then take out the suspension arm or the suspension rope.

The invention discloses a wheel clamp type high-voltage line inspection robot capable of rotating and crossing obstacles and an obstacle crossing method thereof, and belongs to the technical field of high-voltage line inspection. The robot is composed of four cantilever assemblies and a detection unit, a composite guide structure of a lead screw and an L-shaped notch is adopted, rapid and synchronous rotation and accurate angle control of cantilevers in the obstacle crossing process are achieved, and clamping stagnation and deviation when the robot crosses a shockproof hammer and a suspension insulator are effectively avoided. According to the inspection robot, continuous and stable power transmission is kept in the walking and obstacle crossing process, the four cantilever assemblies cooperate consistently, reliable adhesive force and propulsive force are kept, the structure is simple, assembling is convenient, cost is low, and the obstacle crossing success rate and operation reliability of the inspection robot can be remarkably improved.

This utility model discloses a rapid maintenance device for energy storage liquid cooling pipelines, comprising a first quick-connect male connector, a first control switch, a large bolt flange, a locking device, a second quick-connect male connector, a second control switch, and a quick connector. The first control switch is connected to the first quick-connect male connector; one side of the large bolt flange is connected to the first control switch; the locking device is disposed on the other side of the large bolt flange; the second control switch is connected to the second quick-connect male connector; one side of the quick connector is connected to the other side of the large bolt flange, and the other side is connected to the second control switch. This allows for the separation of pipelines and the disconnection of the liquid cooling pipeline network structure for rapid disassembly and maintenance. This enables rapid maintenance in large-scale energy storage system clusters without loss of coolant, avoiding the shutdown of the liquid cooling system and preventing additional material and labor losses.

The invention discloses a cable guiding and threading device for electrical construction, and relates to the technical field of cable installation, the cable guiding and threading device comprises an outer moving mechanism, a cable clamping mechanism and a cable conveying mechanism, the outer moving mechanism comprises a semicircular support, a moving wheel, a first limiting wheel and a first magnet, the moving wheel is installed on the inner upper portion of the semicircular support and can rotate automatically, and the first limiting wheel is installed on the semicircular support; first limiting wheels are installed on the two sides of the interior of the semicircular support, the positions of the moving wheels and the positions of the first limiting wheels can be adjusted, and the first magnets are installed on one sides of the moving wheels; the cable clamping mechanism is of a circular radial expansion structure, a second magnet and a plurality of second limiting wheels are installed outside the cable clamping mechanism, and the second limiting wheels are distributed on the periphery of the second magnet. The outer moving mechanism, the cable clamping mechanism and the cable conveying mechanism are matched to achieve automatic and stable threading of the cable into the pipeline, the threading progress can be observed conveniently, and the cable threading device is suitable for being used for cables and pipelines with different diameter values.

The invention discloses a communication cable take-up and pay-off device for communication engineering, and relates to the technical field of communication cable take-up and pay-off, the communication cable take-up and pay-off device comprises a support and a plurality of take-up and pay-off rollers installed on the side edge of the support, a first rotating ring and a second rotating ring are arranged in the support, the first rotating ring is sleeved with a plurality of cable stroking rollers, and the second rotating ring is sleeved with a plurality of cable stroking rollers; a plurality of driving rollers are arranged on the second rotating ring, a threading plate is arranged at the center of the second rotating ring, the locking piece clamps a broken cable, single-strand or multi-strand cable loosening caused by cable breakage is prevented, the cable is locked, the cable is conveniently connected, the take-up and pay-off roller is conveniently replaced, the cable unwinding convenience is improved, and the cable unwinding efficiency is improved. The driving roller is used for paying off and conveying the cable, the wire stroking roller rotates in the same direction and is matched with the driving roller to be used for stroking the cable in the paying-off process in the reverse direction, in the paying-off process, the cable is dredged and arranged, and the flatness of the unwound cable is improved.

The utility model relates to the technical field of wire cutting, in particular to a cutting assembly and a wire cutting machine. The utility model aims to solve the problems of long adjustment time and low efficiency of the main roller shaft distance. To this end, the cutting assembly of the present application comprises: a cutting frame; the two ends of each first main roller assembly are adjustably arranged on the two opposite side walls of the cutting frame correspondingly. The second main roller assembly is located on one side of a vertical connecting line between the axes of the two first main roller assemblies, the two ends of the second main roller assembly are movably arranged on the two opposite side walls of the cutting frame in the same linear direction, and an included angle is formed between the linear direction and the vertical connecting line. According to the technical scheme, shaft distance adjustment is achieved without removing a wire net, the main roller shaft distance adjustment time is greatly shortened, the cutting efficiency is improved, and the device is suitable for application and popularization.

The utility model discloses a yarn reel with an anti-thread-off function, which comprises a main body, the inside of the main body is connected with a sleeve through a bearing, the outside of the sleeve is sleeved with a fixing ring, the surface of the fixing ring is fixedly connected with a fixing rod, the other end of the fixing rod is provided with a supporting rod, and the inside of the supporting rod is slidably connected with a roller. A spring is installed in the supporting rod, a bearing seat is installed at the top of the spring, the interior of the bearing seat is connected with a fixing cylinder through a bearing, the side face of the bearing seat is fixedly connected with a pressing plate, and the pressing plate is embedded into the supporting rod. According to the yarn reel with the anti-thread-off function, when the yarn reel with the anti-thread-off function is used for paying off, a thread end of a yarn penetrates through a hole in the center of the rolling wheel, after the yarn reel is used, the pressing plate is pulled to descend under the action of the spring, the thread end of the yarn is pressed between the supporting rod and the pressing plate, and therefore the thread end is fixed, and thread off caused by loosening of the external yarn is avoided; and the use is more convenient.

This utility model discloses a foldable warm blanket, belonging to the field of blanket technology. This foldable warm blanket includes a blanket body composed of a base layer, a warming layer, and a skin-friendly layer. A storage bag is located at the top center of the blanket body, sewn to the blanket body. A pair of zippers are sewn to the outside of the storage bag, with zipper pulls installed on the outside of the zippers. A protective layer is connected to the top of the storage bag, and a handle is sewn to the top center of the storage bag. An opening for the handle is provided at the top center of the protective layer. A pair of first straps are sewn to one side of the top of the blanket body, and a pair of second straps are sewn to the other side of the top of the blanket body. This utility model effectively prevents the blanket from unfolding after folding, facilitating storage and carrying. The strap design also prevents the blanket from falling off the body, making it highly practical.

This utility model relates to a fine drawing machine, and more particularly to a copper wire fine drawing machine with a wire breakage alarm function. It provides a copper wire fine drawing machine with clamping protection and a wire breakage alarm function. It includes a machine base, a pay-off roller, a take-up roller, a water collection tank, a drawing roller, a winding wheel, a liquid collection tank, and a tensioning assembly. Tensioning assemblies are respectively installed on the top of the machine base near the take-up roller and the pay-off roller for adaptive tensioning of the copper wire. The tensioning assembly integrates an alarm and a pressure sensor. Through the coordinated operation of the pay-off roller, the take-up roller, the tensioning assembly, and the drawing die sleeve, continuous thinning of the copper wire can be achieved. A linear motor drives the tensioning wheel assembly to reciprocate, and the pressure sensor monitors the tension force in real time. An alarm sounds for wire breakage, and when a wire breakage occurs, a cylinder is automatically triggered to drive the clamping bar to instantly move downwards to clamp the copper wire, preventing it from slipping off. This effectively reduces the number of threading operations and improves production efficiency and safety.

The utility model discloses an electric control fuse, which comprises a shell, the inner wall of the shell is provided with a chute, the inside of the chute is movably connected with a movable frame, the top of the movable frame is movably connected with a bolt through a rolling shaft, and the bolt is in threaded connection with the shell. The clamping blocks are adopted to clamp the wire, the phenomenon that the wire is separated from the shell due to the fact that the wire is subjected to external force, and then the wire is loosened can be prevented, the device is different from a traditional mode of fixing the inner core of the wire, the traditional mode is that the inner core of the wire is directly pressed by the bolt, and the bolt exerts rotating force on the inner core of the wire when the bolt is gradually rotated and pressed. According to the device, the bolt rotates to drive the movable frame to move up and down, so that the wire inner core can be directly pressed, the wire inner core is prevented from being abraded due to rotation of one end of the bolt, the connecting time of the wire inner core is prolonged, wire loosening is avoided, the use effect is good, and the device has the advantage of preventing wire loosening.

The utility model provides a kind of thread trimming mechanism and sewing machine, belong to sewing equipment technical field.The thread trimming mechanism of the utility model includes mounting seat, and the movable cutter one and movable cutter two that can all rotate are provided on mounting seat, and the thread trimming mechanism further includes motor one and motor two, and the connecting rod assembly one for driving movable cutter one rotation is provided on motor one, and the connecting rod assembly two for driving movable cutter two rotation is provided on motor two.The movable cutter one and movable cutter two of the thread trimming mechanism are driven by different driving sources and connecting rod assembly respectively, two movable cutters do not affect each other when rotating, and automatic thread trimming can be completed by mutual cooperation.

The utility model discloses a shirt convenient to put on and take off, which comprises a shirt body, sleeves and sleeve openings arranged on the sleeves, one side of each sleeve opening is provided with a sliding button fixed on the corresponding sleeve, the other side of each sleeve opening is provided with a sliding groove which is arranged along the sleeve edge direction and allows the sliding button to slide, one end of each sliding groove far away from the corresponding sleeve opening is provided with a button hole, and cuffs of the sleeves are made of hard lining materials. The sliding buckles arranged on the sleeves are matched with the sliding grooves, the sliding buckles can rapidly enter the buckle holes matched with the sliding buckles, then the sliding buckles reversely slide to the buckle holes along the sliding grooves, rapid falling is achieved, the hard lining materials of the cuffs have high stiffness and hardness, wrinkles can be effectively resisted, and the service life of the cuffs is prolonged. And when the cuff is hard and the sliding buckle slides in the sliding groove, the sliding buckle is not easy to be separated from the sliding groove, the bent and fixed cuff hard lining has a force which enables the cuff hard lining to tend to be flat, and the direction of the force is the direction in which the sliding buckle is far away from the buckle hole, so that the cuff hard lining is not easy to be separated in daily use.

The present invention relates to the technical field of dialysis pipeline fixing devices, and specifically to a portable dialysis pipeline fixing device, which presses the arterial pipeline and the venous pipeline into through grooves along the through openings at the upper and lower ends inwardly, so that the arterial pipeline and the venous pipeline are penetrated by the through grooves in the axial direction parallel to the fixed axis, and then the second vertical plate is rotated 180 degrees, so that the arterial pipeline and the venous pipeline are wound along the through grooves in an S shape, so that the redundant dialysis pipelines can be conveniently stored, and the fixed shell sleeve is clamped on the fixed axis, the first vertical plate and the outer side of the second vertical plate, and the push block is pushed by the guide sliding member, so that the arterial pipeline and the venous pipeline on the first vertical plate are clamped and fixed, and when the dialysis pipeline is accidentally pulled, the first vertical plate and the second vertical plate are driven to slide laterally and separate, playing a role of elastic buffering, avoiding the risk of derailment or secondary injury to the patient, and realizing further convenient and safe fixation and anti-pulling use of the dialysis pipeline.

The utility model relates to the field of bra accessories, in particular to a memory reset back buckle and underwear, which comprises a hook part and a ring part, each of the hook part and the ring part comprises a base body, the hook part is matched with a row of hook buckles, the ring part is provided with a plurality of rows of buckle rings, and the connection is realized by buckling the hook buckles and the buckle rings. The base body layer structure sequentially comprises an elastic base layer and a surface layer from inside to outside. The surface layer wraps the elastic base layer and the retaining ring, and only part of the retaining ring is exposed. The elastic base layer is located on the inner layer of the base body layer, the back buckle is endowed with excellent longitudinal and transverse tensile performance, automatic and accurate resetting can be achieved after stretching, it is ensured that the specification of the back buckle is stable, and the problem that a traditional back buckle deforms due to continuous stretching is solved. The supporting force of the base body layer is strengthened, so that the retaining ring is more stable, off-line or breakage caused by repeated stretching is prevented, and the overall structural stability of the back buckle is maintained. The surface layer is used as an outer layer, so that internal sewing threads are hidden and protected, foreign body sensation during skin contact is reduced, and comfortable touch feeling is provided.

The utility model relates to the technical field of cable connection, and discloses a cable connection structure for rapid connection in power construction, which comprises a connection assembly and a locking assembly, the side surface of the locking assembly is provided with a clamping assembly, the outer side of the clamping assembly is provided with a connection assembly, and one end of the connection assembly is provided with a guide assembly; the connection assembly comprises a cable and a box body, and one end of the cable is arranged in the box body; the clamping assembly comprises a clamping sleeve and a clamping piece, one end of the clamping sleeve is fixedly connected with one end of the locking assembly, and the clamping piece is recessed inwards, so that the lower insulating sleeve and the upper insulating sleeve are tightly connected through the clamping piece, cables in the lower insulating sleeve and the upper insulating sleeve can be tightly connected and fixed, and the locking sleeve stably fixes the other cable at the same time. Therefore, cables in power construction can be stably and quickly connected, the connection of the cables is quick and convenient, the application range is wider, the cables are prevented from loosening, and the stable connection of the cables is ensured.

The utility model discloses an inner stator multi-strand wire lower wire passing hanging and releasing mechanism, which is characterized by comprising a fixed seat, a wire passing column, a wire releasing pipe, a wire blocking hook and a reset spring, the wire passing column is fixed at the bottom of the fixed seat, the front end part of the wire passing column is used for winding an enameled wire, and the wire passing column is provided with a mounting groove extending front and back; the rear end of the wire blocking hook is hinged in the mounting groove, the front end of the wire blocking hook is provided with a hook body and can rotate up and down, and a pressing spring for pressing the hook body to the outer side of the mounting groove is arranged between the wire blocking hook and the wire passing column; the wire releasing pipe sleeves the wire passing column and can axially move along the wire passing column, after the wire releasing pipe moves forwards, the hook body can be pushed to rotate into the mounting groove, meanwhile, the enameled wire at the front end part of the wire passing column can be pushed away from the wire passing column, and a reset spring for pushing the wire releasing pipe backwards is arranged between the wire passing column and the wire releasing pipe. According to the utility model, the problem of unhooking in the winding process can be prevented, and blanking after winding can be facilitated.

The utility model discloses a collar trepanning device which comprises a trepanning operation table, a pair of inserting holes are formed in the surface of the trepanning operation table in a penetrating mode, vertical rods are inserted into the inserting holes and movably connected with the inserting holes, the top ends of the vertical rods are fixedly connected with pressing strips, and the pressing strips are fixedly connected with the top ends of the pressing strips. A push plate is fixedly connected to the bottom end of the vertical rod, an electric telescopic rod A is installed at the bottom of the tapping operation table, and the other end of the electric telescopic rod A is fixedly connected with the push plate. The punching device has the advantages of being automatic and efficient.

The utility model discloses an electric appliance pedestal comprising a housing, and the bottom of the housing is provided with a first placing space and a second placing space; the take-up assembly comprises an adapter, a wire and an automatic winder; the adapter is clamped into the first containing space, the wire extends out of the automatic winder to be connected with the adapter, and the automatic winder is fixed in the second containing space. According to the utility model, the atomizer structure and the take-up structure are matched with each other, so that the power line can be automatically stored and drawn out for use during use, and the power line can be automatically retracted to store the power line and the adapter after the adapter is pulled out after use; and the conditions of off-line and breakage of the power line and loss of the adapter during long-term use are avoided.

The thread trimming mechanism comprises a fixed cutter, a movable cutter and a movable cutter driving part, a cutter part through hole is formed in the movable cutter, a movable cutter blade is formed by the edge of one side of an orifice in the upper end of the cutter part through hole, and the movable cutter driving part can drive the movable cutter to move to an initial position and a sewing starting extending position. When the movable cutter is located at the sewing starting extending position, the cutter part through hole is located under a machine needle of the sewing machine, and when the movable cutter moves to the initial position, the blade of the movable cutter can be meshed with the blade of the fixed cutter. When the movable cutter is located at the initial position, a bottom thread retaining structure is formed between the bottom thread retaining part and the bottom thread retaining spring, the adsorption assembly is provided with an adsorption opening capable of generating a suction effect, and the adsorption opening is located on the lower side of the cutter part through hole when the movable cutter is located at the initial position; the thread clamping piece is arranged on the upper side of the movable cutter, an upper thread maintaining structure is formed between the upper thread clamping part and the thread clamping piece when the movable cutter is located at the initial position, and the movable cutter driving part comprises a thread trimming motor.

The utility model discloses a subway overhead line system maintenance wire barrow which comprises a barrow body, an installation concave table is arranged on the top of the barrow body, and a winding structure and an auxiliary guide structure are arranged on the installation concave table. The winding structure comprises supporting side plates, a winding shaft and a driving motor, the two supporting side plates are vertically arranged on the mounting concave table, the winding shaft is rotationally arranged on the opposite side walls of the two supporting side plates, the driving motor is arranged on the side wall of one supporting side plate, and a power output shaft is connected with the winding shaft; the supporting side plate is further provided with an auxiliary pressing and holding assembly. The utility model relates to a maintenance pay-off technology, and particularly provides a subway overhead line system maintenance pay-off vehicle.

This utility model discloses an ultrasonic focusing transducer, including a housing, a piezoelectric ceramic, and a circuit board. The four sides of the piezoelectric ceramic and the four sides of the circuit board abut against the inner wall of the housing. The piezoelectric ceramic includes a first electrode surface and a second electrode surface, with the first electrode surface facing the circuit board. It also includes a first conductive structure and a second conductive structure. The two ends of the first conductive structure are connected to the circuit board and the first electrode surface, respectively. One end of the second conductive structure is connected to the circuit board, and the other end passes through a clearance space in the inner wall of the housing and connects to the second electrode surface. This design prevents the wires from being squeezed and damaged by the edges of the piezoelectric ceramic. Furthermore, the electric field lines are perpendicular to the surface of the piezoelectric ceramic, and the electric field intensity is uniformly distributed along the thickness direction of the piezoelectric ceramic, effectively exciting the interior of the piezoelectric ceramic. Compared to setting two electrode regions on one surface, this design improves piezoelectric efficiency.