196results about How to "Overcoming structural complexity" patented technology

The invention relates to a stable tracking control system for a satellite communication antenna for a motion carrier, comprising an embedded antenna controller, an attitude sensor, a high-frequency signal processor, a GPS receiver, a directional integrated driving and controlling motor, a pitching integrated driving and controlling motor, a rolling integrated driving and controlling motor, a mechanical transmission device and a satellite communication antenna. An output shaft of the designed integrated driving and controlling motor can directly drive the antenna so as to simplify the system structure and facilitate the mounting and the maintenance; various main parts of the system and user operation terminals are connected by a field bus mode so as to simplify the connection complexity and benefit the networking work of a plurality of antenna systems; and a novel switching control algorithm based on a switching control theory is designed to improve the control performance of the system. The invention can effectively ensure the indication stability and the tracking performance of the satellite communication antenna on the motion carrier.

The invention relates to an auto-stability method for camera image and the auxiliary device used in hand held state or motion state. It uses angular velocity sensor to check the angular velocity of the camera rotating round the three space axes in real-time and records synchronistical with image signal. The variance of the attitude angle between two pictures would be gained by integral in afterward process software, and the attitude angle variance related to slow-varying low frequency element in motion angular velocity is reserved, meanwhile the attitude angle variance related to dithering angle element would be eliminated. Then, the image dithering would be eliminated by translation and rotation the image. The device is made up of three same circuits. And every process circuit is connected by angular velocity checking circuit which is belonged to signal collection circuit, power lever shifting circuit which is belonged to signal process circuit, voltage/frequency transformation circuit, frequency division circuit, wave transformation circuit, signal compound and extent regulation circuit in series. The output signal is sent to the interface of camera.

The invention relates to a float type level gauge for on-site indication, which comprises a float, a graduated scale and a noctilucence wheel, and is characterized by further comprising a conducting or magnetic conducting guide rail, wherein the noctilucence wheel comprises an insulating box, a light source, two longitudinally arranged magnetic shafts or metal shafts, and two conducting wires for supplying power to the light source; for a magnetic float type level gauge, the noctilucence wheel also comprises a steel magnet; under the magnetic action, the magnetic shafts or the metal shafts, along with upward and downward movements of the float, move upwards and downwards along the guide rail so as to indicate the liquid level on-site accurately in time; or a resistance wire is enwound on the guide rail, and the resistance value of a conducting loop comprising the guide rail, the magnetic shafts or the metal shafts, the conducting wire, the light source and the like is measured to acquire a corresponding liquid level value so as to achieve the continuous long-distance transmission of liquid level data. The float type level gauge can also comprise a pulley wheel, a counterbalance, a connecting rope or a connecting belt to balance the noctilucence wheel. The float type level gauge has the significant characteristics of simple structure, clear and obvious on-site indication, flexible and accurate measurement and continuous long-distance signals.

The invention relates to a wheel/track coupled type self-balancing barrier-free wheelchair. The wheel/track coupled type self-balancing barrier-free wheelchair consists of an upper machine frame, a lower machine frame, a main machine frame, a lower limb machine frame, an auxiliary wheel frame, an auxiliary wheel, a gravity balance mechanism and a wheel/track changing structure moving platform, wherein the upper machine frame and the lower machine frame are connected with the upper end of the main frame in a shaft driving manner and can automatically rotate around the upper end shaft of the main frame through adjustment of the gravity balance mechanism; and the lower limb machine frame is moveably connected with the lower machine frame and can automatically rotate around the outer side of the lower machine frame. By adoption of the wheel/track coupled type moving platform, the wheelchair has excellent obstacle crossing capability when climbing stairs or barriers. The wheel/track coupled type self-balancing barrier-free wheelchair has a reasonable structure, is convenient to operate and provides great convenience for travelling and daily life of people with the lower limbs disabled.

The invention discloses a tubular and tube-in-tube structure organic oxide and a preparation method thereof. The organic oxide has a caliber from 100 nanometers to 1 micron and a tube wall of a porous structure. The preparation method utilizes various organic salts and comprises the following steps: using metal alkoxide and nitrate as raw materials; fully mixing salt solutions with an alcoholic solution of PVP to be electrically spun into fibers under a high-pressure electrostatic field; and treating the fibers at a high temperature to form the tubular and tube-in-tube structure organic oxide. The method is used to prepare the tubular and tube-in-tube structure organic oxide comprising Ti, Si, Zr, V, In, Sn, B, Fe and Co. The invention adopts a traditional single-tube nozzle electrostatic spinning technology to prepare a tubular and tube-in-tube nanometer material, is different from a traditional hydrothermal method, an electrochemic method and a coaxial nozzle electric spinning method for preparing organic tubes, only needs the simplest electric spinning process and the roasting process, has convenient and rapid operation, simple method, novel product structure and strong universality and is suitable for mass production.

The invention relates to a switch panel and a liquid crystal display system for a three-dimensional display device. The switch panel and a light emergent side of a polaroid portrait of the liquid crystal device are arranged in an attaching way; the switch panel comprises two transparent substrates; transparent conductive films are respectively coated on two opposite surfaces of the two transparent substrates; a liquid crystal layer is filled between the two transparent substrates; and oriented films mutually vertical to oriented grooves are respectively arranged on two sides of the two transparent substrate. The other switch panel and the light emergent side of a polaroid portrait of the liquid crystal device are arranged in an attaching way; the switch panel comprises at least one transparent substrate, liquid crystal layers filled between the transparent substrate and the liquid crystal display device, and two transparent electrodes on which driving signals are applied; the oriented films are arrayed along a first mode; and the liquid crystal layers are arrayed along a second mode. The liquid crystal display system comprises the switch panel and polarization analyzing glass which corresponds to the switch panel. The invention adopts a liquid crystal secondary optical rotation technology to achieve three-dimensional image and has simple structure, low cost and favorable imaging effect.

The invention relates to a float type level gauge for high-temperature high-pressure or high-temperature low-density medium, comprising a float chamber, a float and a graduated scale; the float type level gauge is characterized in that: the float is a hollow spherical shape; the float type level gauge further comprises a guide rail and a magnetic connector, a magnetic steel or a disc-shaped magnetic steel is arranged in the magnetic connector and forms magnetic attraction with a magnetic ball body in the float made of the nonferrous magnetic material or the disc-shaped magnetic steel the float made of the nonferrous magnetic material, a metal shaft laterally spanned at two side walls of the magnetic connector is exposed to two side walls and is attached to the guide rail by magnetic force, and the metal shaft can move up and down along the guide rail under the driving of the magnetic force; in addition, resistance wires are wound on the guide rail to measure the change of the resistance value of a return circuit, so as to realize continuous remote transmission of a signal. The float type level gauge for high-temperature high-pressure or high-temperature low-density medium solves the difficult problem of liquid level measurement in the high-temperature high-pressure or high-temperature low-density medium and has high measuring precision; in addition, the structure is simple, the usage is convenient, the manufacturing and maintaining cost is low and the application is wide.

The invention is concerned with a kind of process equipment for produce production, especially a kind of wire feeding welding machine with fuse for fusible core. The worktable fixed on the frame has turning plate frame with at least four tasks and the task has movable clamp extended among the radial direction, and at the corresponding position to each task, there are tube push framework, wire feeding welding upper cap framework, welding down cap framework, location framework and stuff-accepting framework on the surface of worktable. Except the stuff-accepting framework, each of the aforesaid framework drives by each cam and drive pole under the worktable. The tube push framework connects with tube feeding equipment, and the wire feeding welding upper cap framework connects with upper cap feeding equipment, the welding down cap framework connects with down cap feeding equipment. The worktable and / or turning plate has equipment that keeps clamp moving. The drive axis drives by motor, the feeding equipment, heating equipment and motor of the tube, upper cap and down cap monitors by power control equipment.

The invention discloses a YOLO target detection method using GPU hardware acceleration. The method comprises steps of: (1) initializing a convolutional neural network (CNN); (2) acquiring a training sample; (3) determining the grids of the training sample; (4) training the CNN; (5) determining whether a loss value is less than 0.01, saving the trained CNN if so, or acquiring and training a next training sample if not; (6) saving the model of the trained CNN in a computer hard disk; (7) extracting the characteristics of a test picture; (8) determining the location rectangular frame of the testpicture target; and (9) ending the target detection. The method can realize feature extraction on a target in the image on a general computer, then marks the location of the target with the location rectangular frame, and marks the category of the target at the upper right corner of the location rectangular frame.

The invention discloses a dynamic pressure gas bearing structure provided with a radial supporting foil, comprising a bearing body and the radial supporting foil. The structure is characterized in that: a blocking groove tangent with the inner diameter of the axle hole of a bearing body is arranged on the bearing body; the radial supporting foil is inserted into the axle hole along the blocking groove in a tangential way; most of the front end of the foil is closed by winding a circle and along the radial direction that is contrary to the rotating direction of a rotor, and forms a closely attached elastic supporting part with the internal wall of the axle hole; a fastener is arranged on the blocking groove for closely fixing the rear end of the foil inserted in the blocking groove. Compared with the prior art, the radial supporting foil of the invention consists of two layers of foils; wherein, the elastic foil with bubbles has good rigidity and damping and restrains the vibration of the rotor and limits the increase of the amplitude of whirling motion, thus overcoming the shortcomings of complicate structure, requirements for high manufacturing precision and high cost of the existing dynamic pressure radial bearing and obviously enhancing the reliability and economical efficiency of the operation of turboexpanders.

The invention relates to a low-dimensional nanophase material high-flexibility assembling chip and an application method, which belong to the micro-fluidic field and the nano structure material assembly field. The method realizes the electric field distributing control in a micro-fluidic body (4) according to the following two aspects to further generate micro force used for realizing assembly control: one the one hand, the on-off control of pumping signal of each pin in a pin array (11) is controlled to realize that only some microelectrode arrays (13) have electric potential so as to further change the area size of the effective bounding region of the electric field at the top of the chip; and on the other hand, a virtual aurora pattern array is projected on a photoconductive layer (32) by a micro light pattern generator (5) to further limit the electric field boundary at the bottom of the micro-fluidic body (4) in the chip.

The invention discloses a novel hydraulic pump body mechanism. The top end of a hydraulic pump body is connected with a fixed jaw; an electromagnetic coil is mounted on the outer circle of the hydraulic pump body; a lower cover body is mounted in the lower port part of the hydraulic pump body; a lower cover ball is mounted on the lower cover body; a lower cover spring and a lower gland are mounted on the lower cover ball; a piston is mounted in a hole in the middle of the hydraulic pump body; a piston rolling ball is mounted on the piston; a telescopic spring and a piston gland are mounted on the piston rolling ball; a piston spring is mounted at the upper part of the piston; and an upper cover body is mounted at the upper port part of the hydraulic pump body.

The invention discloses a wireless intelligent video surveillance system based warning method. The wireless intelligent video surveillance system based warning method comprises the steps of adopting the wireless intelligent video surveillance system to selectively conduct anti-theft detection, abandoned object detection, intrusion detection, personal attach suffering detection, crowding degree detection, event counting, flame detection and smoke detection on an object to be monitored. By means of the wireless intelligent video surveillance system based warning method, the defects of complicated structure, small application range, high cost and the like in the prior art can be overcome so as to achieve the advantages of simple structure, large applications range and low cost.

The invention discloses a method and a system for recommending a display keyword of a data object. The method comprises the following steps of: receiving a current data object of a display keyword to be recommended; judging whether a relevant history data object which is relevant to the current data object exists in a recommended library or not, if so, acquiring a display keyword which corresponds to the relevant history data object from the recommendation library, and determining a display keyword which corresponds to the current data object; otherwise, acquiring a display keyword which corresponds to the current data object according to a query log in an online way. Due to the adoption of the method and the system provided by the invention, the coverage rate of the query log is increased, and meanwhile, the requirement of instantaneity is met.

The invention relates to an on-line sampling device for multi-phase flow liquid. The device comprises a container which is uprightly installed, wherein the lateral surface of the upper end of the container is provided with a hole which is connected with an inlet pipeline, a spiral passage with a downward spiral angle is arranged in the container, and the inlet pipeline is connected with an inlet of the spiral passage; and the inner wall of the lower part of the container is welded with an annular liquid storage bin, 'L'-shaped diversion baffle plates are uniformly distributed on the inner wall of the container between the liquid storage bin and an outlet of the spiral passage, the upper end of the container is connected with a gas discharging pipeline, the lower end of the container is connected with a discharging pipeline of a process system, and the bottom of the liquid storage bin is connected into a liquid sampling and discharging pipeline. The device has the advantages of novel design, simple structure, elimination of movable component, high safety and reliability, convenience in installation, low cost, good applicability, high sampling quantity and high sampling accuracy and has obvious significance for reducing the product cost of a multi-phase metering product and improving the measurement accuracy of the phase division rate.

The invention discloses a slanting slider locking slanted extracting device of a fixing mold of an injection mold. The slanting slider locking slanted extracting device is characterized by comprising a slanting slider (1), a guiding slider (2) and an oil cylinder (3). A linkage device, in which the oil cylinder and the guiding slider are arranged in the fixing mold to drive a slanting slider for locking and slanted extraction, is adopted in the slanting slider locking slanted extracting device, wherein guide rail grooves of a locking section and an slanted extracting section are arranged on the guiding slider, the slanting slider is provided with a sliding shaft; during work, the oil cylinder drives the guiding slider to move transversely; the guide rail groove of the guiding slider drives the slanting slider to carry out the locking and slanted extraction movement by the sliding shaft of the slanting slider; when the sliding shaft is positioned in the locking section of the guide rail grove, the slanted slider is locked; when the sliding shaft is positioned in the slanted extraction section of the guide rail groove, the slanted slider is extracted and demolded; the technical scheme overcomes the problem and the shortcoming of complex structure and high manufacturing cost in the prior art; and therefore, the sliding slider locking slanted extracting device of the fixing mold of the injection mold achieves the purpose of simplifying structure and reducing cost.

The invention discloses a displacement detection device, a magnetic suspension bearing and a displacement detection method thereof. The device comprises: a redundant sensor and a control mechanism; wherein, the redundant sensor is arranged on each degree of freedom of a to-be-detected bearing (1) and used to redundantly obtain a displacement signal of the to-be-detected bearing (1) on the degree of freedom to which it belongs; and the control mechanism is used to control the operation condition of the degree of freedom to which the displacement signal belongs according to the redundantly obtained displacement signal. The solution of the present invention can overcome the defects of large resource consumption, complicated structure and low reliability in the prior art, and achieve beneficial effects of small resource occupancy, simple structure and high reliability.

The invention relates to a piezoelectric positioning platform coupling inchworm bionics and parasitic motion principle and a control method. A driving unit, an active cell unit and a clamping unit inthe positioning platform are separately connected with a foundation support, and sheet-shaped structures on two sides of an active cell in the active cell unit are in clearance fit with grooves on output ends of the driving unit and the clamping unit. Meanwhile, periodic square wave and sawtooth wave driving voltage having a certain time sequence are separately applied to piezoelectric stacks in the clamping unit and the driving unit to realize the stepping motion of the active cell. The piezoelectric positioning platform has the advantages that various advantages of the inchworm bionics and the parasitic motion principle can be coupled, the problems that the inchworm bionic piezoelectric positioning platform piezoelectric elements are used more and the structure and control are complicated as well as the problems that the parasitic motion piezoelectric positioning platform self-locking performance is poor and the backspacing motion is significant can be solved, and a feasible scheme can be provided for researching a piezoelectric positioning platform simultaneously having a large stroke, high carrying capacity, small backspacing motion and simplicity in structure and control.

The invention discloses a network application identification method based on a multilayer neural network, and the method achieves the training of the neural network through extracting data flow features, and solves the problems that the encrypted flow cannot be identified, and the identification efficiency is low in the prior art. The method comprises the following steps of: 1, capturing a networkflow data packet; 2, generating a feature set of the network data flow; 3, generating a data set; 4, generating a training set and a test set; 5, constructing a multilayer neural network; 6, traininga neural network; And 7, identifying the test sample set. The method has the advantages of capability of identifying the encrypted traffic, simple model and high identification speed, and can be usedfor identifying the network application type of the network traffic.

The invention discloses an inclined sliding groove rail pair with a self-locking flat surface. The inclined sliding groove rail pair comprises a driving sliding block (1) and a driven sliding block (2). By means of the groove rail pair composed of the driving sliding block and the driven sliding block, an abutting flat surface is arranged at the position of an inclined sliding rail of the driving sliding block, a non-return flat surface is arranged at the position of an inclined sliding groove of the driven sliding block, during working, the driving sliding block linearly slides, the inclined sliding rail of the driving sliding block tract pulls the inclined sliding groove of the driven sliding block to enable the driven sliding block to slide in an inclined mode, the abutting flat surface of the driving sliding block slips into and abuts against the upper portion of the non-return flat surface of the driven sliding block so as to prevent the driven sliding block from retracting, so that an inclined core drawing block at the lower end of the driven sliding block is locked, the driving sliding block only slides for one time to perform inclined pulling and locking to the driven sliding block, defects of complicated structures, high costs, excessive hidden danger and fault links and low efficiency which exist in prior art are overcome, and purposes of simplifying structures, reducing costs and fault links and improving efficiency are achieved.

The present invention provides a shift driving device for a special four-wheel off-road vehicle, comprising a back drive axle provided with a power input shaft and a front drive axle driven by an output shaft therein; wherein, the back drive axle is internally assembled with a planetary reducing mechanism, a shifting mechanism, a main driver and a differential; a ring gear base assembled with a planetary big ring gear is fixed on the casing of the back drive axle; a sun gear realizes the connection with the input shaft through a spline, and a planetary gear assembled on the planetary frame is respectively meshed with the sun gear and the planetary gear; the fork of the shifting mechanism is driven by the inner rocker and moves axially so as to lead a combination sleeve to connect the input shaft with the two shafts by the spline or connect the two shafts with the planetary frame by the spline. Apart from having a reasonable structure design, meanwhile satisfying the trafficability of the four-wheel off-road vehicle, the present invention realizes that the vehicle can run at a walking speed as necessary; compared with the same reducing device, the driving mechanism of the present invention has simple operation, which can drive the power after shifting to the front drive axle, thus providing easier assembly and maintenance, and being good for reducing the cost.

The invention provides an electric-control hydraulic adjustment mechanism based on a camshaft and allowing the valve lift to be changed continuously. The electric-control hydraulic adjustment mechanism based on the camshaft and allowing the valve lift to be changed continuously structurally comprises a cam, a tappet body, an oil inlet hole, an engine body main oil duct, an adjustment oil cavity, a sliding sleeve, an oil hole, a plunger, a connecting body, an oil drainage channel, a one-way valve, a plunger bushing, a valve, an oil return hole, an oil return groove, an electromagnetic valve, a return spring, a guide rod, a control piston and an oil return duct, wherein the tappet body moves along the outer edge of the sliding sleeve along with the cam, oil pressure in the adjustment oil cavity acts on the top surface of the sliding sleeve, the sliding sleeve moves up and down along the inner edge of the connecting body and the outer edge of the plunger bushing, the sliding sleeve and the plunger bushing are matched with the plunger located inside the plunger bushing, so that an auxiliary oil cavity and a high pressure oil cavity are defined, and the bottom of the plunger bushing is connected with the head of the valve. The electric-control hydraulic adjustment mechanism based on the camshaft and allowing the valve lift to be changed continuously has the advantages that the valve lift is adjusted by controlling oil intake and oil return and adjusting the change of the quantity of oil in the oil cavity, continuous change of the valve lift is achieved, the number of components is small, the occupied space is small, an engine cylinder cover is slightly changed, and the defects of an existing adjustment mechanism are effectively overcome.

The invention discloses a slot sliding key type simple self-locking inclined slide block pair device which comprises a driving slide block (1) and a driven slide block (2). By adoption of the device consisting of the driving slide block and the driven slide block, when a sliding key is positioned at a straight sliding section, the stress motion direction of the driven slide block is orthogonal to the stress motion direction of the driving slide block; and during operation, the driving slide block straightly slides along the stress motion direction, an inclined sliding section of a chute hole of the driving slide block guides the sliding key to drive the driven slide block to move in an inclined manner, and when the sliding key slides into the straight sliding section, the problems and the defects of complex structure, high cost and low efficiency in the prior art are overcome by utilizing the technical scheme in which the stress motion direction of the driven slide block is orthogonal to the stress motion direction of the driving slide block and the driving slide block is prevented from retracting by locking the driven slide block through straight sliding, so that the aims of simplifying the structure, reducing the cost and improving the efficiency are fulfilled in the process of machining a self-locking inclined slide block pair.

The invention discloses an efficient driven vibration insulation and reduction platform imitating the physiological structure of the head of a woodpecker. The efficient driven vibration insulation and reduction platform comprises a driven vibration-reduction assembly, a variable-stiffness various-damping air spring assembly, a combination bearing platform and an outer frame, the driven vibration-reduction assembly comprises a hard rubber pad and a cutting type viscoelastic damper, the variable-stiffness various-damping air spring assembly comprises two or more than two double-air-chamber air springs which are symmetrically distributed along a machine base, the combination bearing platform comprises a top board, a bottom board and side boards, wherein the top board, the bottom board and the side boards are made of steel boards, insulation layers are arranged among the top board, the bottom board and the side boards, and the outer frame is symmetrically arranged on two sides of the machine base. The efficient driven vibration insulation and reduction platform imitating the physiological structure of the head of the woodpecker has no acting part and is low in energy consumption. Compared with a vibration-reduction platform under driving control, the efficient driven vibration insulation and reduction platform can greatly lower manufacturing cost and operation cost, save energy, and be economical and practical.

A brushless harmonic excitation synchronous motor belongs to the field of electro-magnetic synchronous motors. The brushless harmonic excitation synchronous motor aims at solving the problems that an existing permanent magnet motor depends on an expensive permanent magnet material, and a separate exciter is required by an electro-magnetic motor. According to the brushless harmonic excitation synchronous motor, a winding groove is formed in the middle position of a pole shoe of each pole, the winding grooves divide the pole shoes into rotor sub-teeth, a harmonic winding is embedded in each rotor sub-tooth, a harmonic magnetic field is generated in a motor air gas by means of a third harmonic current, a higher harmonic current or a dc component current in a stator, a sensing current generated in the harmonic windings provides an exciting current for an exciting windings, and brushless excitation is achieved. The brushless harmonic excitation synchronous motor is completely based on electric excitation, does not depend on the permanent magnet material and the exciter, overcomes the shortcoming that a motor system is complex and huge in structure in an exciting mode of the independent exciter, and is simple in structure, convenient to manufacture, good in performance and suitable for being applied to wind-driven generation and mixed hybrid electric vehicles.

The invention discloses a liquid injection automatic control valve, which comprises a hollow valve body (1), a valve rear seat (6) and a valve front seat (2), wherein a valve cavity in the valve body is formed between the valve front seat and the valve rear seat; and a valve ball (5) is arranged in the valve cavity, is connected with a floating ball (12) in a box container through a valve rod (11), and can ascend and hermetically seal a ball seat at the lower end of the valve rear seat under the buoyancy action of the floating ball or can descend and fall into a valve cabin under the actions of liquid negative pressure and gravity. The valve can be widely suitable for all box containers such as an oil tank, a water tower, a water closet water tank, a solar water heater water tank and the like, can be automatically closed after injected liquid reaches a set height without the control of manpower, a lever floating ball valve and an electronic valve during liquid injection, and overcomes the defects of complex structures, high cost, high damage possibility, difficulty in maintenance and inconvenience of usage of all valves of the type in the market at present.

The invention discloses a novel energy-saving electric loader drive control system and control method, and belongs to the technical field of shoveling engineering machinery vehicles. A control handleis connected with a vehicle control unit (VCU); the VCU is electrically connected with a motor controller I, a motor controller II and a power battery controller BMS; the motor controller I is in control connection with a double-output-shaft walking motor, and the double-output-shaft walking motor drives front wheels and rear wheels through a front transmission shaft and a rear transmission shaft;the motor controller II is in control connection with a hydraulic pump control motor, and the hydraulic pump control motor drives a hydraulic pump to provide power for a hydraulic system of a loader;and the power battery controller BMS is in control connection with a power battery pack, and the power battery pack supplies power to the double-output-shaft walking motor and the hydraulic pump control motor. The motor is in a mode of a double-output-shaft structure, the whole machine is easy to arrange, the structure is simple and convenient, the reliability is high, the problems that an existing loader is complex in structure and control are solved, the working efficiency is high, and the good energy-saving effect is achieved.

The invention discloses a lateral inclined-knockout core-loosening device arranged in a lateral sliding block. The technical scheme adopted by the invention is as follows: the device comprises a lateral sliding block (1), a ball pin (11), an inclined knockout rod (2), a back-off pellet (21), a pin hole (22), a stop dog (23), an inclined knockout base (3) and a restraining slot (31). The lateral inclined knockout core-loosening device arranged in the lateral sliding block is characterized in that the inclined knockout rod and the back-off pellet are arranged in the lateral sliding block; and during die sinking, the inclined knockout rod and the back-off pellet aslant slide to extend out of the lateral sliding block under the restriction of the stop dog while an inclined guide post drives the lateral sliding block to carry out lateral demoulding, so that the back-off pellet is laterally skew to loosen the core and demould in a back-off mode from a product along the direction orthogonal with the demoulding direction of the lateral sliding block, and therefore the problems and defects of complex structure, high cost, low efficiency and high possibility of generating wastes in the prior art are overcome. The inclined knockout mechanism is arranged in the lateral sliding block, so that the structure of the injection molding mould for laterally skewing to loosen the core and demould in a back-off mode for the product is simplified, the cost is lowered, the demoulding efficiency is improved, and wastes are avoided.

The invention discloses a rigid rotor system for a helicopter. The rigid rotor system comprises a rigid rotor propeller hub, a rigid rotor pitch control mechanism and rigid rotor paddles, wherein the rigid rotor pitch control mechanism and the rigid rotor paddles are glued integrally and are connected with the rigid rotor propeller hub by virtue of bolts. According to the system disclosed by the invention, deep groove ball bearings and thrust bearings in the conventional teeterboard type propeller hub structure are replaced by joint bearings, so that a series of complex structures such as pitch change shafts, flapping hinges and vertical hinges are removed, and the problems such as complexity of the conventional teeterboard type propeller hub structure, heavy weight and short service life can be solved. Meanwhile, the problems that retreating paddleseasily enter an aerodynamic stalling state so as to reduce the aerodynamic efficiency due to swinging during high-speed forward flight and the like are solved, and the rigid rotor system has the advantages of simple structure, light weight, long service life, high maintainability and the like.

An embodiment of the invention discloses a door lock. When fingerprints of a user are verified by a fingerprint verifying system 12, a control circuit in the fingerprint verifying system 12 sends out electric signals to a single motor 10 in the door lock so as to push a slide rail piece 11 and control positions of a pin 9 of a gear device to realize gear shift, and a handle 3 can be mechanically pressed to rotate in place, so that a locking spring bolt 1 can retract into the door lock, and the door lock is unlocked, and further, the door lock can be locked when the handle 3 is lifted outside a door. The door lock can be unlocked mechanically under driving of the single motor, so that electric energy is saved, the structure of the door lock is simpler as compared with a fingerprint verification double-bolt American door lock in the prior art, and probability of failure is decreased by the aid of the single motor. Besides, the door lock utilizes the model integrating gear parts in the prior art with a door opening shaft, brings great convenience for quick switching of leftwards opening and rightwards opening, and accordingly, is simple and convenient in operation and humanized in design.