305results about How to "Compact and simplified structure" patented technology

To provide a compact sensor device for the automatic door assembly, which can be mounted and dismounted easily to a support member and be effective to secure the safety in the doorway vicinity, a activation sensor (1) for opening a door (3) and a safety sensor (2) for keeping the door (3) open are supported in a fashion overlapped one above the other in a direction conforming to the direction in which they are secured to a support member (5).

The fully automatic compact non-PVC film bag making, filling and sealing machine includes one bag making mechanism, bag transferring mechanism, filling and sealing mechanism, synchronous ring conveying belt with corresponding site operating interface tongs. The present invention has simple compact structure, small size, easy regulation and maintenance, high production efficiency and other advantages, and is used in completing bag making and medicine liquid filling and packing.

The invention provides an abrasion test device for a tibiofemoral joint of a bi-dimensional rotating and bi-dimensional movement synthesized knee replacement prosthesis, which consists of a right part and a left part, wherein the right part is arranged at the right side of the test device and is a drive structure used in the bending and stretching movement of the prosthesis joint; the left part is arranged at the left side of the test device and produces the bending and stretching abrasion movement between the side of the prosthesis joint; and a rocker rod in a four-rod mechanism of the right part is connected with a main shaft in a thigh bone system of the left part. The invention meets the standard requirements of iso14243, the abrasion test of a shank bone prosthesis and a thigh bone prosthesis tries to be conducted in an environment which is similar to the biologic environment of the replacement prosthesis in the human body, the abrasion process approaches the real abrasion condition of the knee prosthesis, and the abrasion property and the abrasion prediction are more accurate. Meanwhile, the test deice has a bigger active control freedom of degree and strong adjustability. The inertia force loading mode enables the structure to be more simple and compact. The invention has higher practicable value and broad application prospects in the technical fields of knee joint prosthesis manufacture and medical instruments.

The invention discloses a case and bag lifting handle with the weighing function, which comprises a lifting handle body, a function switch and a display screen, wherein the lifting handle body consists of a handle bottom cover and a handle upper cover and is provided with a handle cavity, a battery compartment is arranged in the lifting handle body, the function switch and the display screen are arranged on the lifting handle body. The invention is characterized in that a weighing sensor connected with the display screen and the function switch which are arranged on the lifting handle body is arranged in the handle cavity, the weighing sensor is provided with two symmetrical loading ends, and the two symmetrical loading ends are both connected with case and bag connecting elements and respectively extend out from cavity openings at both ends of the lifting handle body. The invention adopts one sensor, the structure is reasonably simplified and becomes compact, the operation is more convenient, in addition, the invention has the characteristic of high weighing accuracy, and at the same time, the manufacture cost is reduced. The connecting elements of both ends of the lifting handle can be designed to present a hinging connection mode according to the characteristics of cases and bags, so the lifting handle arranged on the cases and the bags can vertically stand and can also be folded, and the lifting function of the invention is completely equal to that of the existing case and bag lifting handle.

The invention relates to a miniature dual-power supply automatic conversion switch. The miniature dual-power supply automatic conversion switch comprises an automatic conversion device, a normally-used circuit breaker and a back-up circuit breaker, wherein the automatic conversion device comprises a shell, intelligent control circuit boards, mechanism racks, a motor, a bevel gear and two groups of transmission assemblies, each group of transmission assembly comprises a transmission gear, a cam and a conversion arm, the transmission gear is linked with the bevel gear, the cam is linked with the transmission gear, the conversion arm is rotatably arranged on the mechanism rack, corresponding to the cam and used for driving a handle of the normally-used circuit breaker / a handle of the back-up circuit breaker, the cam rotates with the transmission gear so as to drive the conversion arm to rotate, a breaking piece is movably arranged on the mechanism racks and is corresponding to a part between the transmission gear and the cam, the transmission gear and the breaking piece are freely matched in a closing direction and are matched in a linkage way in a breaking direction, an interlocking mechanism is arranged in the shell and is matched with the conversion arm in a linkage way, and the intelligent control circuit boards are used for controlling the motor to positively rotate, reversely rotate and stop. The miniature dual-power supply automatic conversion switch has the advantages of compact structure, high reliability, safety, reliability and small size and is convenient to install.

The invention belongs to a hydraulic control technology, and particularly relates to a load maintaining control valve. The load maintaining control valve is capable of, through designing a relative conical surface structure of a main valve element and a control valve element and isolating a main valve element oil way and a pilot control oil way, realizing extremely low leakage performance, using alarge action area ratio structure of a pilot push rod and the control valve element to realize low-pressure control of a high-pressure main valve, and adequately using multi-functional integration ofan internal structure and each part structure of the main valve element to complete structure simplification and a compact design, reducing the number of parts and avoiding matching a high-precisionslide valve, thereby reducing processing cost. So a low-leakage requirement design and a cost reducing and structure compact design of the load maintaining control valve are completed well, and the load maintaining control valve has extensive application prospect.

The invention discloses an internal wave type crankshaft-free internal combustion engine. An internal wave wheel and a dual cascade valve cam are both fixed on an output shaft. Twelve cylinders are axially, symmetrically, annularly and evenly arranged on the circumference of the dual cascade valve cam inside the internal wave wheel. One end of a push rod is hinged with pistons; the other end of the push rod has a cam roller and a push rod roller; and the cam roller is inserted into a shape groove of the internal wave wheel, and the push rod roller is arranged in a guide groove. The driving force of the pistons is transmitted to the internal wave wheel and the output shaft by the push rod and is outputted, thereby saving a crankshaft and a connecting rod in the prior internal combustion engine. The guide groove bears a circumferential component force of the force given to the push rod by the internal wave wheel, thereby bringing about zero side pressure between the pistons and the cylinder walls. All acting forces of the pistons on the internal wave wheel are completely balanced. The dual cascade valve cam controls the intake and exhaust valves of all cylinders without a valve timing driving mechanism. The internal combustion engine is characterized by compact and simple structure, no side pressure, small axial size, low vibration, stable running, high outputted torque and power, high efficiency, long service life, and the like.

The invention discloses a high-efficiency dust collection device for coal mining. The high-efficiency dust collection device for coal mining comprises a shell body, and dedusting water is stored in the shell body. A fixed bracket is arranged at the bottom of the shell body, and the shell body is fixed on the fixed bracket. An air suction dryer is arranged at the top of the shell body, and a wind suction hood is arranged at the front end of the air suction dryer and a draught fan is arranged in the air suction dryer. The after end of the air suction dryer is communicated with the bottom of theshell body by a conduit pipe. A gas density sensor is arranged in the top end of the shell body and a wind pipe is arranged at the front side of the inner of the shell body top. By the high-efficiencydust collection device for coal mining, the structure is ingenious and reasonably arranged, specifically that firstly, the coal dust in the raise dust is wiped off effectively and the air in work place is cleaned; secondarily, the gas density in work place can be tested and reduced, and the security is improved; thirdly, efficient filtration and sedimentation of coal dust is achieved and the coaldust is convenient to discharge; fourthly, an actuating mechanism in an engine room is ingeniously arranged and the structure is compact and simple.

The invention discloses a suspension type hydraulic profiling flower and fruit thinning machine and a usage method thereof. According to the flower and fruit thinning machine, a moving frame is arranged on a suspending frame through a guide rail, a pushing hydraulic cylinder is arranged on the suspending frame and is connected with the moving frame, a profiling hydraulic cylinder is arranged on the moving frame and is connected with a flower and fruit thinning mechanism, the flower and fruit thinning mechanism is connected with the moving frame through a rotating shaft, a detection rod assembly is arranged on one side of the flower and fruit thinning mechanism, the pushing hydraulic cylinder, the profiling hydraulic cylinder and the flower and fruit thinning mechanism are connected with a hydraulic control device through oil pipes respectively, and the detection rod assembly is electrically connected with the hydraulic control device. The usage method of the flower and fruit thinning machine comprises that the distance between a target fruit tree and a flower and fruit thinning adhesive tape group is adjusted through the pushing hydraulic cylinder, an included angle formed by the flower and fruit thinning mechanism and a crown of the target fruit tree is adjusted through the profiling hydraulic cylinder, and then the flower and fruit thinning operation is conducted. The profiling flower and fruit thinning operation can be conducted for fruit trees through suspending connection of the flower and fruit thinning machine and a tractor, the mechanical degree is high, and the working efficiency is high.

The invention discloses a transportation method of a conveyor with a transport surface being a rigid carrier. A mobile rigid carrier is adopted to transport goods, that is, roller wheels are installed on the rigid carrier as carriers transporting heavy goods; a plurality of rigid carriers with the roller wheels are mutually connected in serial by chains; the serially connected rigid carriers are supported on rigid tracks of the conveyor by the roller wheels; the chains are connected from beginning to end, and chain wheels installed on the conveyor drive the chain to move; simultaneously, the chains drive the rigid carrier to do circulatory movement. A rigid body with roller wheels is used as the transport carrier of a conveyor in the invention so that heavy goods with big volumes can be placed on the rigid carrier with a small volume; additionally, the device of the invention has simple structure and low manufacture cost, which can overcome certain disadvantages of the existing conveyor and has very good use value and popularization value.

The invention relates to an outlet air mechanism for automobile air-conditioner, comprising power part, a first transmission part, upper air supply door, two second transmission parts, left air supply door and right air supply door. The output end of power part is fixed with the first transmission part and the upper air supply door is fixed with the first transmission part. Two second transmission parts are connected with left and right air supply doors and upper air supply door respectively. The power part drives upper air supply door rotate on the self rotating axis through the first transmission part and the upper air supply door drives left and right air supply doors rotate on self rotating axes by the second transmission part. By setting the second transmission part, the upper air supply door is related with left and right air supply doors so that they rotate on self rotating axes and realize the purpose that one power part controls three air outlets to output wind at least. It can realize the adjustment of multi methods for outputting wind. Because of parts are few in the mechanism, it is provided with simplified whole mechanism, shortened transmission line of wind door and more accurately controlled the movement of wind door.

A control panel assembly for a washing machine is disclosed. The structure of the control panel assembly provided with a decoration member is greatly simplified. The control panel assembly includes a control panel mounted on an outer case of the washing machine, a first decoration member penetrating the control panel and enclosing a push button, a second decoration member enclosing the first decoration member. The second decoration member supports a rear side of the first decoration member and is supported by the control panel and the first decoration member. A transparent cover covers the control panel and supports a front portion of the first decoration member.

The present invention relates to an integrated battery tank preparation method, which comprises: 1, carrying out one-time injection molding to obtain a housing with an opening on the bottom portion, wherein the housing is provided with electrode plate group tank separation plates, an electrolyte distribution channel, electrolyte injection holes, post terminal holes, and post terminal pole separation plates; 2, carrying out one-time injection molding to obtain a large cover plate with a metal inert; 3, placing electrode plate groups into electrode plate group tanks, and adhering the bottom portion of the housing and a bottom plate to form an integrated body; and 4, adhering the large cover plate and the housing top surface periphery of the electrolyte distribution channel to form an integrated body. According to the present invention, the housing obtained through the one-time injection molding is used, the internal of the housing is the electrode plate group tanks separated by the electrode plate group tank separation plates, and the top portion of the housing is provided with the post terminal holes, the post terminal hole separation plates for separating the adjacent post terminal holes, and the electrolyte injection holes, such that the housing has the electrolyte distribution effect and the electrode plate group container effect so as to make the whole battery tank structure be simplified and compact; and with the post terminal pole separation plates, the battery short circuit caused by the contact of the terminal posts is effectively prevented so as to ensure the battery safety.

The invention discloses a combined-type high-voltage conversion switch which comprises a double-power-supply switching device and a vacuum circuit breaker, wherein the double-power-supply switching device comprises a main power supply post, an auxiliary power supply post, a wire outlet column; and the vacuum circuit breaker comprises a wire inlet terminal, a wire outlet terminal, a vacuum extinction mechanism and an operation mechanism. The double-power-supply switching device also comprises a main vacuum extinction mechanism electrically connected with the main power supply post and an auxiliary vacuum extinction mechanism electrically connected with the auxiliary power supply post; the switching operation mechanism comprises a driving mechanism with a driving arm, a lever and an interlocking mechanism which is used for synchronously driving the switch-on and switch-off motions of the main vacuum extinction mechanism and the auxiliary vacuum extinction mechanism; the driving arm in the driving mechanism is connected with one end of the lever in a rotation mode, and the other end of the lever is connected with the interlocking mechanism; and the wire inlet terminal of the vacuum circuit breaker is electrically connected with the wire outlet terminal in the double power supply switching device. According to the invention, the time required for double-power-supply switching is shorter, and the double-power-supply switching is approximate to non-time-difference switching.

The present invention relates to a modified dead axle type hydraulic automatic gear shift with six axle gears, which is characterized in that a single row star arrange on an additional axle of the double-shaft dead axle type hydraulic gear shift having not reverse gear, and the simple structure only with four clutches, an arrester, a single direction clutch has excellent capacity of six advancing gears, a reverse gear. The invention has many shifting gears, high shifting ratio, which is suitable for various military use, civilian use vehicles, particularly for diesel motor vehicle having small shifting range.

The invention discloses an actuator cylinder of a built-in buffer load-reducing device, belonging to the field of aviation hydraulic actuator cylinders, for solving the problem of unobvious pure throttling buffer effect of the existing actuator cylinder. The actuator cylinder comprises a cylinder cover, a cylinder body, a piston rod and a piston, wherein the piston rod penetrates through the cylinder cover; the piston is arranged in the cylinder body, and is connected with the cylinder body through a locking nut; and a floating clearance which can move relative to the piston rod is arranged between a great ladder shaft end surface of the piston rod and the locking nut. According to the invention, a rapid return starting function can be kept without arranging a special return rapid oil supplying valve, simultaneously two tail ends of the actuator cylinder have buffer functions, moreover the loading output by the actuator cylinder is reduced in the buffer process, the collision and overloading extrusion of parts of the actuator cylinder or a moving mechanism are avoided, the structure of the actuator cylinder is simplified and compacted, and technology difficulty and manufacturing and using cost for manufacturing and assembly are reduced, and the stability and safety reliability are improved.

The invention relates to a hot blast heater realizing preheated combustion of a horizontal spraying heat accumulator of premixed air flow of gas and air, effectively solving the problems that the mixing is slow and nonuniform, the combustion strength is insufficient and incomplete, larger combustion chamber is required, and a combustor is complex. The hot blast heater has the structure as follows: a hot air outlet pipe and a mixed air flow inlet pipe are arranged on the wall of a combustion chamber; a distribution annular channel communicated with the mixed air flow inlet pipe is arranged in the inner wall of the wall of the combustion chamber; a spray nozzle communicated with the combustion chamber in the wall of the combustion chamber is arranged at the inner side of the distribution annular channel; a grate positioned in a cold air chamber is arranged on the lower part of a heat accumulation chamber on the lower part of the combustion chamber; a heat accumulator is arranged in the heat accumulation chamber; a support pillar fixed at a blast bottom is arranged on the lower part of the grate; the grate, the wall of the hot blast heater and the grate bottom form the cold air chamber; an exhaust gas outlet pipe and a cold air inlet pipe are arranged on the cold air chamber; and a labyrinth connection structure is formed between the upper part of the wall of the hot blast heater and the lower part of the wall of the combustion chamber. According to the invention, a simple sleeve combustor is adopted, and high-strength combustion is realized by virtue of the heat accumulator, the structure of the hot blast heater is simplified and is compact so that the investment cost is reduced, and the hot blast heater is stable in structure.

The invention relates to a bridge guardrail device with a lifting warning function. The bridge guardrail device comprises a bridge base body (1) and multiple guardrail units (2) installed on the bridge base body (1); each guardrail unit (2) comprises two fixed sleeve stand columns (4) fixed to the bridge base body (1) in a bilateral symmetry mode, an upper beam (21) and a lower beam (22), the upper beam (21) and the lower beam (22) stretch across and extend the portion between the two fixed sleeve stand columns (4), and the upper beam (21) and the lower beam (22) are each provided with a circuit device and fixedly connected through vertical handrails (23); each fixed sleeve stand column is internally provided with a threaded hole in threaded fit with a vertical stud (43), and the upper end of each vertical stud (43) stretches into the upper beam (21) and is axially and fixedly connected with the upper beam (21) through an upper thrust bearing (431) and a lower thrust bearing (432).

The invention relates to an air heating furnace with nozzles in a pre-burning chamber for reflowing preheating burning by opposed jetting and mixing. Gas and air inlet pipes on a pre-burning chamber wall are connected with gas and air distribution ring channels which are placed in half of the pre-burning chamber wall respectively, the nozzles on the ring channels are communicated with the pre-burning chamber in the pre-burning chamber wall, a hot air outlet pipe is arranged on the pre-burning chamber wall and connected with a burning chamber wall, a heat storage chamber is arranged on the lower portion of the burning chamber in the burning chamber wall, furnace grills and support columns are arranged on the lower portion of the heat storage chamber, heat retainers are arranged in the heat storage chamber, the support columns are placed in a cold air chamber, the heat storage chamber, the furnace grills and the cold air chamber are placed in an air heating furnace wall, the air heating furnace wall and a furnace bottom are fixed, a smoke outlet pipe and a cold air inlet pipe are arranged on the cold air chamber, and the air heating furnace wall is connected with the burning chamber wall in a sleeving mode. According to the air heating furnace, problems of low mixing rates, uneven mixing, low burning intensities, low burning temperatures, incomplete burning, unstable burning and complicated structures are solved.

The invention belongs to the original device technical field in the radio frequency communication and micro electro mechanical system (MEMS) technical field and provides a piezoelectric type two-block cascaded micro mechanical filter. The piezoelectric type two-block cascaded micro mechanical filter includes two vibration blocks with the same size, a coupling beam, supporting beams, supporting stages, an input electrode, an output electrode, direct current bias electrodes, piezoelectric film layers and an insulating substrate; the two vibration blocks are connected with each other through the coupling beam; the two vibration blocks are also connected with the supporting stages through the supporting beams which are fixed at the middle point of one side edge of each vibration block respectively; the two vibration blocks are arranged on the insulating substrate in a suspension manner; the vibration blocks are covered with one piezoelectric film respectively; the input electrode and the output electrode are arranged on the piezoelectric films respectively; one pair of direct current bias electrodes surround the two vibration blocks; and the direct current bias electrodes and the vibration blocks form a capacitance structure. According to the piezoelectric type two-block cascaded micro mechanical filter of the invention, a piezoelectric structure is adopted, and the filter can be formed through the coupling of the two vibration blocks, and therefore, the piezoelectric type two-block cascaded micro mechanical filter has the advantages of simple and compact structure, reduced processing difficulty, high coupling efficiency, high Q value and better sharp cut-off.

The invention discloses a self-unloading logistics warehouse with a ventilation and heat exchange system, which comprises a two-body warehouse and an unloading device; the two-body warehouse has a first warehouse and a second warehouse; both the first warehouse and the second warehouse are equipped with A ventilation heat exchange system; the unloading device includes a box body, a first auger, a second auger and a driving device; the first auger includes a first driven gear; the second auger includes a second driven gear; the driving device It includes a drive motor and a clutch linkage device; the clutch linkage device includes a frame body, a transmission shaft, a pulley and a clutch transmission gear that can reciprocate on the transmission shaft; when the clutch transmission gear moves to one end of the external thread part, it is in the first transmission position. position, when the transmission shaft rotates forward, the first driven gear is driven to rotate by the first transmission gear in the clutch transmission gear. The structure of the invention is relatively compact and reasonable.

The invention relates to a rotating piston engine. The rotating piston engine comprises a shell consisting of a cylinder 1 and front and back end covers 2 and 3; a rotor 4 is mounted on a main shaft 5; the main shaft is mounted in main bearings of the front and back end covers; N cylinder chambers 8 are uniformly distributed on the rotor 4; N pistons 9 are embedded; two ends of piston pins 11 extend into piston pin moving rails 18 arranged on the front and back end covers to perform a same-speed misaligned rotating motion along with the rotor; the outer diameter of the rotor 4 and the inner diameter of the cylinder 1 are cylinders with the same diameter, and are in clearance sliding contact; a reciprocating crankshaft type internal combustion engine piston air sealing structure is adopted to solve the problem of difficult air sealing of a rotor engine; meanwhile, the principles of front-grade continuous air compression of a gas turbine and continuous acting of high-pressure gas in a combustion chamber are acted in the rotating piston engine; the rotating piston engine overcomes multiple defects in a traditional internal combustion engine technology; and the rotating piston engine has the excellent effects of simple structure, high mechanical efficiency, stable operation, no vibration and low noise.

The invention provides a bridge with a lifting guardrail and a solar power supply function. The bridge comprises a bridge base body (1) and a plurality of guardrail units (2) installed on the bridge base body (1). Each guardrail unit (2) comprises two fixed sleeve stand columns (4) which are fixed to the bridge base body (1) in a bilateral symmetry mode, an upper cross beam (21) and a lower cross beam (22), wherein the upper cross beam (21) and the lower cross beam (22) stretch across and extend across the space between the two fixed sleeve stand columns (4); the upper cross beam (21) and the lower cross beam (22) are each provided with a circuit assembly and are fixedly connected through vertical railings (23). Each fixed sleeve stand column (4) is provided with a bolt hole in thread fit with a vertical stud (43). The upper end of each vertical stud (43) stretches into the upper cross beam (21) and fixedly and axially connected with the upper cross beam (21) through an upper thrust bearing (431) and a lower thrust bearing (432).

A system and method for filtering is disclosed, which is capable of accomplishing a filtering operation at a high recovery rate of 96% or more, and realizing a compact and simplified system structure, the system comprising a water bath including an inlet and a discharging hole, wherein feed water to be treated is supplied to the inside of the water bath through the inlet, and concentrated water is discharged out through the discharging hole; and plural membrane cassettes including first and second membrane cassettes submerged into the feed water contained in the water bath, wherein the first membrane cassette is positioned nearest to the inlet, and the second membrane cassette is positioned nearest to the discharging hole, wherein the first membrane cassette treats the feed water with a first impurity concentration; the second membrane cassette treats the feed water with a second impurity concentration; and the first impurity concentration is smaller than the second impurity concentration.

A bridge provided with liftable guardrails and capable of realizing intelligent control comprises a bridge base body (1) and multiple guardrail units (2) mounted on the bridge base body (1), wherein each guardrail unit (2) comprises two fixed sleeve stand columns (4) fixed on the bridge base body (1) in a leftwards and rightwards symmetric manner as well as an upper cross beam (21) and a lower cross beam (22) which stretch across and extend out of the space between the two fixed sleeve stand columns (4), the upper cross beam (21) and the lower cross beam (22) are provided with circuit devices and are fixedly connected with each other by the aid of vertical rails (23), a screw hole in threaded fit with a vertical stud (43) is formed in each of the two fixed sleeve stand columns (4), and the upper end of each vertical stud (43) extends into the upper cross beam (21) and is axially and fixedly connected with the upper cross beam (21) by the aid of an upper thrust bearing (431) and a lower thrust bearing (432).

The invention discloses a horizontal permanent magnetic mechanism breaker. The breaker comprises a frame, vacuum switch tubes arranged on the frame in parallel, two permanent magnetic driving mechanisms with push rods, a rotation shaft, two separating brakes and six breaking-closing brake crank arms. The push rods of the permanent magnetic driving mechanisms are horizontal and are vertical to the moving directions of moving and static contact breaking-closing brakes of the vacuum switch tubes to form a horizontal structure. The rotation shaft is arranged in the frame in a rotatable mode, the middle ends of the crank arms are sleeved and fixed on the rotation shaft, the lower ends are in rotatable connection with the push rods of the permanent magnetic driving mechanisms through hinge pins, and the upper arms are connected with the bottom ends of insulation pull rods through hinge pins. The vacuum switch tubes are arranged along the plumb line directions, the static contacts are arranged on the upper portions, and the movable contacts are arranged on the lower portions. The portions of the static contacts, which stretch out of the top ends of vacuum switch tube casings are fixed with and electrically connected with upper power connection plates. By means of the breaker, the whole height can be reduced effectively, and the breaker is in accordance with the miniaturization development trend.

The invention discloses a fast-light-tunable device based on stimulated Brillouin scattering. The fast-light-tunable device comprises an optical pulse light source module, an optical amplifier, an optical fiber circulator, an attenuation-tunable module and an optical fiber coupler, and is characterized in that the attenuation-tunable module, the optical fiber circulator, the optical fiber coupler and a section of common single-mode optical fiber form a one-way ring resonant cavity, and an optical pulse enters the resonant cavity after being amplified by the optical amplifier. When the power of the optical pulse is larger than a threshold value, a stimulated Brillouin laser is generated in the resonant cavity, the output time of an optical signal is earlier than the input time of pulsed light at the moment, and therefore the transmission speed of signal light is improved. Under the condition that the fast light is achieved, the timing advance value of the optical signal can be controlled by controlling the attenuation-tunable module, and then the propagation speed of the light can be tuned. The fast-light-tunable device can work under any wavelength and can be well compatible with a modern optical communication system, and the lead time value of the fast light can be continuously adjusted.