48results about How to "Implementation constraints" patented technology

The invention discloses a miniature zero differential type double-flow transmission gear reduction box which comprises a box body shell, a straight transmission gear set, a steering transmission gear set, a first planetary differential mechanism, a second planetary differential mechanism, a first output gear set and a second output gear set. The straight transmission gear set, the first planetary differential mechanism and the first output gear set are arranged on one side in the box shell, and the steering transmission gear set, the second planetary differential mechanism and the second output gear set are arranged on the other side in the box shell. The first planetary differential mechanism and the second planetary differential mechanism are coaxially arranged and arranged at the two ends of the sun gear shaft correspondingly. The miniature zero differential type double-flow transmission gear reducer can be installed on a miniature crawler-type power platform, has the advantages of being small in size and high in universality, overcomes the defect that crosstalk exists in straight moving power input and steering power input, and achieves high-precision and high-stability rotating speed and torque output of the two extended output shafts.

The utility model belongs to the technical field of lens processing equipment, and particularly relates to a clamping mechanism for lens processing equipment, which comprises a worktable, a mounting frame is arranged on the upper surface of the worktable, and an electric guide rail is mounted below the mounting frame; through the arrangement of the inserting block and the two fixing assemblies, the elasticity of the first spring is utilized, after the inserting block is completely inserted into the inserting groove, the first spring can push the limiting block to reset, the limiting block is inserted into an inner cavity of a limiting hole in the inserting block, restraining on the inserting block is achieved, and therefore the purpose of rapid fixing is achieved; an opening communicated with a slot is formed in the upper surface of a mounting block, so that an operator can conveniently push two limiting blocks to the outer side so as to achieve the purpose of quick disassembly, a buffer assembly is arranged, excessive clamping force is absorbed and buffered through the elasticity of a second spring, and the situation that when two clamping mechanisms get close to each other, the two limiting blocks are separated from each other is avoided. And the lens cannot be released due to overlarge clamping force generated on the lens, so that irreversible damage to the lens main body is generated.

The invention discloses a multi-domain constraint emotion recognition system inspired by an adaptive cognitive map and an emotion recognition method, which are applied to the field of electroencephalogram signal processing. According to a traditional emotion classification method, after electroencephalogram signals are subjected to manual feature extraction, key features are screened and input into traditional classifiers such as a support vector machine (SVM), but professional priori knowledge is needed for manual feature extraction; most of the methods mainly focus on feature selection and time information utilization, so that space information is not fully utilized; according to the method, a space-guided dynamic graph constraint learning module is designed, a topological structure is generated in a self-adaptive mode, the function relation of the topological structure is constrained, and complex spatial domain feature extraction overcoming cognitive priori information is achieved; meanwhile, a time-excited sequence attention module is provided, and global time sequence dependence characteristics are captured by paying attention to more important time in the sequence; furthermore, a new multi-domain interaction attention module is designed, traditional static cross-domain interaction is overcome, and constraint of multi-domain difference information and aggregation of complementary information are achieved. Besides, in order to better utilize information migration between different domains, a constraint is introduced to reduce distribution difference between the source domain and target domain features, and similarity and mobility of cross-domain features are improved.

The invention belongs to the field of event argument extraction, and provides an event co-occurrence prefix-based event argument extraction method, which comprises the steps of BART-Marge model construction, coding intermediate key and coding intermediate vector extraction, template coding unit coding, prefix splicing, text coding, network output calculation, vector Infoext acquisition, bias addition and event argument extraction. According to the method, semantic information of all events existing in input is extracted, and prefixes are extracted and added, so that the capability of processing a complex event relation by a model is enhanced; through the arrangement for introducing two Info-Qs, the constraint of the model on the output format is enhanced, and the disorder of the output format of the model is prevented; by introducing an adjustable copying mechanism, the problem of potential noise caused by introduction of extra information in attention calculation of each layer is solved.

The invention discloses a micro-seismic quantitative prediction method based on theoretical model constraint and data driving fusion. The method comprises the following steps: 1, acquiring original micro-seismic data of a coal mine working face to form an initial sample data set; 2, preprocessing data and dividing the data into a training set and a test set; 3, constructing a long and short term memory network LSTM model; 4, sampling historical micro-seismic data as a micro-seismic event quantitative prediction sample; 5, constructing a multi-objective optimization model containing seven sub-objective functions including a micro-seismic time fractal dimension, a micro-seismic space fractal dimension, a micro-seismic energy fractal dimension, micro-seismic predicted total energy, micro-seismic reconstructed mining-induced stress, a micro-seismic activity process and a micro-seismic energy-frequency power law b value; and 6, solving an optimal sampling sample as a predicted value. According to the method, quantitative prediction of the micro-seismic event based on theoretical model constraint and data driving fusion is achieved through the steps, the prediction effect is good, and the prediction result can effectively guide on-site production activity process regulation and control, implementation of pressure relief measures and disaster early warning.

The present application relates to the technical field of computer vision, deep learning and graphics rendering, in particular to a 3D portrait reconstruction method and system based on cascade diffusion prior and UV space physical constraint, which adopts a parameter efficient adaptation paradigm of freezing a unified DiT backbone and a cascade LoRA adapter, and sequentially completes UV space texture completion, illumination homogenization and intrinsic material decomposition; introduces a cross-intrinsic attention mechanism to realize multi-material pixel-level spatial alignment, and executes differential physical rendering supervision to constrain material physical consistency in the UV domain. The present application realizes 100,000-level field image generalization under less than 100 3D scanning samples, and the generated 4K PBR material assets have no baking light and shadow residues, and the physical behavior is consistent under re-illumination, which is suitable for high-fidelity 3D portrait asset production in the fields of digital human creation, film special effects and virtual reality.

This invention relates to a double diaphragm coupling that limits radial displacement and provides overload protection. The invention includes a driving adapter plate, comprising a first adapter plate flange and a first connecting surface extending axially along the center of the first adapter plate flange; a driven adapter plate, comprising a second adapter plate flange and a second connecting surface extending axially along the center of the second adapter plate flange; a spacer shaft with circumferentially spaced third connecting blocks extending axially; the first connecting surface and its corresponding third connecting surface are mated by engagement of the first and third connecting blocks; the second connecting surface and its corresponding third connecting surface are mated by engagement of the second and third connecting blocks. This invention limits the radial displacement of the diaphragm coupling when it is subjected to radial offset, preventing damage to the diaphragm and protecting the diaphragm coupling.

This application relates to a vacuum monitoring device for connection to a vacuum pipeline. It includes a first storage body forming a vacuum cavity; a second storage body connected to the first storage body; an indicator block disposed within the second storage body, one end of which is movably connected to the outer wall of the first storage body, and the other end of which is elastically connected to the inner wall of the second storage body; a through hole is formed in the wall of the first storage body, communicating with the vacuum pipeline. Changes in the vacuum level within the vacuum cavity cause the indicator block to reciprocate. The device also includes a vacuum toilet connected to the vacuum monitoring device. This vacuum monitoring device has a simple structure and is easy to install. More importantly, it can determine the vacuum level in the vacuum pipeline in real time, thus facilitating better use of the vacuum toilet.

The invention discloses a film plate and an optimization method thereof and a film container, the film plate comprises a plate body, the plate body is provided with a first corrugated structure, a second corrugated structure and at least one intersecting curved surface, the first corrugated structure is arranged in a convex manner, the second corrugated structure is arranged in a concave manner, and the first corrugated structure and the second corrugated structure are arranged in an intersecting manner through the intersecting curved surface; wherein a design curved surface is defined, the design curved surface is of a curved surface structure formed in the mode that the first convex curve translates along the first concave curve and the vertex of the first convex curve slides on the first concave curve, the first corrugated structure and the second corrugated structure can penetrate through the design curved surface, and an intersecting curved surface is defined by intersecting lines. The corrugated structure and the intersecting curved surface are matched together to improve the displacement compensation capacity of the film plate, and the liquid tightness and the air tightness of the film container can be improved; the plate body is low in ductility, small in forming thinning amount and small in residual stress; the design and manufacturing cost and difficulty are reduced, and the forming precision is easy to control; and the performance optimization of the thin film plate can be realized.

The invention discloses an education transformation learning method and system based on prison management, and the method comprises the steps: obtaining the crime condition and prison performance of a prisoner before a handheld tablet computer is allocated to the prisoner, carrying out the evaluation of the prisoner, and carrying out the evaluation of the prisoner. Establishing a learning resource library and an accessible website according to the crime condition and the prison performance and evaluation condition so as to facilitate learning and entertainment of the prisoner; after the handheld tablet computer is allocated to the prisoner, the handheld tablet computer is associated to a management terminal, so that the management terminal manages the use condition of the handheld tablet computer; and rewarding points for the prisoners according to a preset point rewarding rule and the learning conditions of the prisoners, and deducting the points of the prisoners according to a preset point consumption rule and the entertainment conditions of the prisoners, so as to guide the prisoners through a point system, thereby achieving the purpose of taking learning as a main part and taking entertainment as an auxiliary part.

This utility model belongs to the field of battery loading and unloading transportation technology, and discloses an auxiliary replacement platform for battery packs in energy storage power stations. The platform is mounted on a forklift with a certain load-bearing capacity. The front end of the forklift has a lifting function, enabling it to transport the replacement platform to a suitable position for loading and unloading. The platform has an auxiliary pushing device for battery packs, a platform height adjustment device, and a clamping device to ensure safe transport of battery packs. This platform has significant advantages such as automatic control, solving the problem of inconvenience in using traditional battery disassembly and assembly devices.

The invention discloses a self-luminous cable warning indicator and a matched installation tool thereof, and belongs to the technical field of cable warning indicators, the self-luminous cable warning indicator comprises a substrate, the front end of the substrate is detachably connected with a warning plate, the rear end of the substrate is fixedly connected with a butt joint terminal, the lower end of the substrate is fixedly provided with an electric control device, the upper surface of the substrate is fixedly provided with a lamp tube, and the lamp tube is fixedly connected with a lamp holder. The lamp tube is fixedly arranged at the rear end of the base plate and electrically connected with the electric control device, and a solar panel is fixedly arranged at the rear end of the base plate and electrically connected with the electric control device. A vertical plate is fixedly arranged on the upper surface of the base plate, a hook body is fixedly connected to the upper end of the vertical plate, and a clamping assembly is arranged on the upper surface of the base plate and corresponds to the hook body. According to the invention, butt joint of the warning indicator and the cable is facilitated, the warning indicator can be stably hung on the cable through the arrangement of the clamping assembly, the stability is high, and a self-power-generation and self-light-emitting integrated full-automatic mode of the warning indicator is realized.

The invention discloses a high-speed railway roadbed accumulated deformation prediction method based on ECNN, and the method comprises the following steps: inputting roadbed accumulated deformation data at a historical moment into a trained ECNN model for processing, and obtaining an accumulated deformation value of a roadbed at a future moment; wherein the ECNN model is constructed after a machine learning model and a stable cumulative plastic strain curve are coupled. The method is ingenious in conception, simple and easy to operate, achieves the technical purpose of high external generalization performance, effectively solves the technical problems that a traditional machine learning roadbed cumulative prediction model only has generalization ability in distribution and has poor time distribution external generalization, and can provide a new reference for high-speed railway roadbed cumulative deformation prediction.

The utility model relates to a grooving device, which comprises a support frame, a grooving device and a cutting device, the grooving unit is arranged on the working platform, the grooving unit comprises supporting side plates, a cutter assembly and a driving assembly, the supporting side plates are oppositely arranged on the working platform, the driving assembly comprises a driving part and a guide rail extending in the first direction, the two ends of the guide rail are assembled on the supporting side plates correspondingly, and the cutter assembly is arranged on the driving part; the cutter assembly comprises a cutter, the cutter is connected with the guide rail in a sliding mode, the cutter is connected with the output end of the driving part, and the cutter is driven by the driving part to move in the first direction. According to the utility model, the position of the grey board can be limited in the grooving process, so that the grey board is effectively prevented from deviating when the grey board is subjected to larger acting force, the grooving precision is further ensured, the grooving quality is further ensured, the grey board can be prevented from being damaged, and the qualification rate of grooving of the grey board is improved.

The application provides a mobile high-speed railway lubricating and wear-reducing device and a mobile high-speed railway lubricating and wear-reducing system. The mobile high-speed railway lubricating and wear-reducing device comprises a walking support assembly, an adjusting assembly and a coating assembly. The adjusting assembly has a first driving part and an elastic adjusting part. One end of the elastic adjusting part is in abutment with a secondary support part. The coating assembly is connected to a primary support part at a first preset angle through a mounting member, and the mounting member can adjust the position of the coating assembly in the vertical direction. The total length of the primary support part and the secondary support part is adapted to the width of the track by using the adjusting assembly, that is, the width direction is adjusted and limited. The height direction of the coating assembly is adjusted by using the mounting member, so that the output end of the coating assembly corresponds to the position to be coated, that is, the height direction is adjusted and limited. The application realizes accurate positioning of the position to be coated by adjusting and limiting the height direction of the coating assembly and adjusting and limiting the width direction.

The utility model relates to the technical field of composite bags, in particular to a composite bag with guiding easy-to-tear performance, which comprises a composite bag body, a bag body to be torn, a matt printing layer, a blocking layer, a reinforcing layer and a heat sealing layer, the sealing unit is connected with the composite bag body, is used for sealing the composite bag body and comprises a first-stage sealing assembly for sealing an object in the composite bag body and a second-stage sealing assembly which is arranged at one end far away from the first-stage sealing assembly and is used for sealing a tearing area; the tearing unit is connected with the sealing unit, is used for providing a tearing point position, and comprises a positioning assembly which is arranged between the primary sealing assembly and the secondary sealing assembly and is used for forming a tearing track; according to the utility model, the tearing position of the composite bag is accurately positioned, the tearing strength is low, and the use is convenient.

The cerebrovascular disease rehabilitation chair capable of promoting blood circulation comprises a base and an operation box, the operation box is fixedly connected to the top end of the base, a movable frame is movably connected to the interior of the operation box, and first teeth are evenly connected to the two ends of the interior of the movable frame. When the control force on the lower limbs of a patient in the initial rehabilitation stage is poor, the patient can place the feet into the foot frame, the hand wheel is rotated to drive the rotating rod to rotate, the bottom of the rotating rod drives the rotating disc to rotate synchronously, and the rotating disc drives the meshing block to make continuous contact with the two sets of first teeth and second teeth in the rotating process; when the movable frame makes contact with the two sets of second teeth, the movable frame continuously reciprocates back and forth, so that the lower limbs of the patient can synchronously swing back and forth in the process of continuously rotating the hand wheel, the lower limbs of the patient are exercised, blood circulation is promoted, and rehabilitation of the lower limbs of the patient is facilitated.

The utility model relates to the technical field of chip processing, in particular to a chip processing positioning clamp convenient to clamp. According to the technical scheme, the device comprises a mounting frame, fixing frames and a box body, a workbench is movably installed at the top of the box body, clamping blocks are movably installed at the positions, on the two sides of the workbench, of the top of the box body, the fixing frames are fixedly installed at the tops of the clamping blocks, and electric telescopic rods are fixedly installed on the sides, away from the workbench, of the fixing frames; a clamping table is fixedly connected to the side, close to the workbench, of the pressure detector, a mounting column is fixedly mounted at the top of the box at the rear end of the workbench, an electric push rod is fixedly mounted at the front end of the mounting column through a mounting frame, and a lower pressing table is fixedly mounted at the output end of the bottom of the electric push rod through a pressure sensor. Through the combination of various structures, different clamps can be selected for processing according to chip processing requirements when the device is used, the flexibility of the device is high, the operation is simple, the chip is convenient to clamp, and the use process is optimized.

The utility model belongs to the technical field of prestress tension anchorage devices, and particularly relates to a tool with an extrusion head attached to a base plate, which comprises the extrusion head, an anchor base plate, an extrusion plate and a tension bolt, the extrusion head is located between the anchor base plate and the extrusion plate, and a first through hole for a steel strand to penetrate through and a second through hole for the tension bolt to penetrate through are formed in the extrusion plate. The diameter of the first through hole is smaller than the outer diameter of the extrusion head, a connecting cylinder is arranged on the side wall, facing the extrusion plate, of the anchor bearing plate, one end of the tension bolt is connected into the connecting cylinder in a threaded mode, and the other end of the tension bolt can abut against the side wall, away from the extrusion head, of the extrusion plate. According to the utility model, the tension bolt penetrates through the second through hole in the extrusion plate and then is in threaded connection with the connecting cylinder on the anchor backing plate, so that extrusion force is applied to the extrusion head, the extrusion head is enabled to abut against the anchor backing plate, and the problem of looseness between the anchor backing plate and the extrusion head is solved. In addition, no hole is additionally formed in the anchor bearing plate, and the service life of the P-type face is guaranteed.

The utility model relates to a restraining device for a central nervous system CP patient, and belongs to the field of medical instruments. Comprising an upper body restraining mechanism, a thigh restraining mechanism, two shank restraining mechanisms, two arm restraining mechanisms, a supporting table and a base. The supporting table is installed on the base, the thigh restraining mechanism is installed at the top end of the supporting table, the two arm restraining mechanisms are installed at the left end and the right end of the thigh restraining mechanism in a one-to-one correspondence mode, and the shank restraining mechanism and the upper body restraining mechanism are hinged to the front end and the rear end of the thigh restraining mechanism in a one-to-one correspondence mode. The upper body, the thighs, the shanks and the arms of a patient can be restrained, meanwhile, rehabilitation training is conducted on knee joints, elbow joints, thigh roots and waist and back muscles of the patient, and the muscle tension of the patient is improved.

The invention provides a visualization method and system for self-adaptive matching of a display object resolution and a fusion processing mode. The method provided by the invention comprises the following steps: before to-be-displayed content reaches a video physical port of a visualization system, determining a display template according to a plurality of to-be-controlled visualization system display sizes; selecting a target visualization system according to the content density of the to-be-displayed content; determining a display object type in the to-be-displayed content, determining a fusion processing mode of the display object according to the display object type, determining a fused display position of each display object according to the display scene, supplementing a display template corresponding to the target visualization system, and obtaining a target display template; different types of display objects are obtained by utilizing a video physical port, each display object is processed by utilizing a video processor according to a fusion processing mode of each display object, and a plurality of processed to-be-fused display objects are displayed in the same canvas according to a fused display position in a target display template to obtain a fused canvas; and displaying in the target visualization system.

The utility model relates to the technical field of magnetic strip clamping structures, in particular to a magnetic strip clamping structure of a magnetic strip rack, which comprises a telescopic assembly, a rotating assembly is arranged at the bottom end of the telescopic assembly, the rotating assembly comprises a fixed plate, a fixed assembly is mounted in the fixed plate, the fixed assembly comprises two gears, and the gears are connected with the telescopic assembly. The two gears are meshed through teeth, suspension rods are symmetrically connected to the bottom ends of the two gears, and frame plates are rotationally connected to the inner sides of the bottom ends of the suspension rods. The output end of the air cylinder stretches out and draws back to control and pull the rack to move, movement of the rack can control one gear to rotate, then the two gears are controlled to rotate relatively, movement of the gears can drive the suspension rod to clamp, the two frame plates get close to each other, then a magnetic strip roll is clamped, at the moment, resilience force of the reset springs can buffer the frame plates, and the magnetic strip roll is clamped. The impact generated when the frame plate makes contact with the edge side of the magnetic strip for the first time is reduced, then the magnetic strip roll can be protected, and the abrasion degree generated when the magnetic strip roll is clamped is reduced.

The utility model relates to the technical field of pipeline pressure detection, in particular to a sucralose conveying pipeline pressure detection device which comprises a semicircular supporting ring and a semicircular connecting ring which are detachably adsorbed on the two sides of a pipeline, the supporting ring and the connecting ring are in butt joint to form a circular ring, and arc-shaped grooves are formed in the front side faces of the supporting ring and the circular ring. The two arc-shaped grooves form a circle, the two side walls of each arc-shaped groove extend outwards to form limiting grooves, rolling wheels rolling along the limiting grooves are arranged in the limiting grooves, the other end of the connecting rod penetrates out of the arc-shaped grooves and is fixedly connected with the side face of the magnetic powder inspection detector, and the detection end of the magnetic powder inspection detector faces the welding seam. According to the application, the supporting ring and the connecting ring can be adsorbed on the pipeline, and the roller can roll in the limiting groove, so that the magnetic powder inspection detector is limited, the magnetic powder inspection detector can only rotate along a welding seam and is prevented from shaking left and right, and the time and the physical power consumed by a worker for aligning the welding seam are saved.

The utility model relates to frame detection technical field, concretely is a kind of carbon fiber bicycle frame compression resistance detection platform, including table body, the surface of table body is provided with placing plate, and the upper surface of table body is fixedly connected with support frame, and the lower surface of support frame is fixedly installed with telescopic cylinder. The utility model can realize that first moving block drives connecting block and first limit plate to move by the rotation of positive and negative screw rod, and then it is convenient to limit the left and right sides of frame by first limit plate, the rotation of first threaded rod can realize that second moving block drives second limit plate to move, it is convenient to limit frame front and back by second limit plate, and then the stability of frame can be guaranteed by the cooperation of first limit plate and second limit plate, the constraint to frame can be realized, so as to prevent frame from deviating due to compression, and it is favorable to guarantee the quality and accuracy of frame detection.

The utility model relates to a supporting and rotating device for cookware. The supporting and rotating device comprises a workbench. The rotating boss is arranged above the working table, a circular groove with an upward opening is formed in the top of the rotating boss, a first negative pressure hole is formed in the circular groove, and a second negative pressure hole is formed in the outer wall of the rotating boss; the negative pressure pump is installed on one side of the bottom end of the rotating boss, and the negative pressure pump is used for communicating with the first negative pressure hole and the second negative pressure hole; and the driving part is mounted at the bottom end of the workbench and is used for driving the rotating boss to rotate. Through the combined design of the circular groove, the first negative pressure hole and the negative pressure pump, the bottom end of the outer wall of the cookware is limited, and therefore paint spraying can be conveniently conducted on the inner wall of the cookware.

The utility model relates to the field of bag type dust collector, especially a kind of anti-twist filter bag for bag type dust collector.The anti-twist filter bag for bag type dust collector includes framework and filter cloth coated in the outside of framework;The filter cloth is cylindrical, and a plurality of bandages are sewn in the circumference inner wall of the filter cloth, so that axial slot is formed between the bandage and the filter cloth;Positioning insert corresponding to the number and position of bandage is fixed on the framework, and the positioning insert can be inserted into the slot inside.The anti-twist filter bag for bag type dust collector provided by the utility model has bandage on the inner wall of filter cloth, axial slot is formed between the bandage and the filter cloth, positioning insert is arranged on the framework, the positioning insert can be inserted into the slot inside, further limit to filter cloth is realized, to improve the stability of filter cloth.

The invention discloses an inflating nozzle constraint structure of an easily-detached inner tube type hub motor. The inflating nozzle constraint structure comprises a stator shaft, two end covers, a rim, an inner tube, a permanent magnet rotor, a stator winding and an outer tube which are coaxial, the two end covers are locked on two sides of the rim, and inner rings of the end covers are in running fit with the stator shaft; the outer tire is arranged on the outer ring of the rim; an outer ring of each end cover is integrally provided with a circle of structural ring, and one part of the structural ring of one of the two end covers is provided with an air nozzle extending notch; an air tap penetrating hole is hollowed in the wall body, close to one side of the air tap extending gap, of the rim; the columnar air tap of the inner tube sequentially penetrates through the air tap penetrating hole and the air tap extending notch and is exposed outside; an air tap constraint device is mounted at the air tap extending gap, and the air tap constraint device tightly holds the columnar air tap; and the air tap is effectively restrained, and meanwhile, the easy-to-disassemble and easy-to-assemble performance is realized.

The invention belongs to the technical field of plasma equipment, and specifically is a dielectric barrier discharge plasma equipment for a cell culture plate, comprising a dielectric barrier discharge plasma equipment body; a base is arranged at the bottom of the dielectric barrier discharge plasma equipment body; a lifting mechanism is arranged in the base; the lifting mechanism comprises a support plate, a No. 2 rod and a cam; a No. 1 groove is arranged on the top of the base; the support plate is fixedly connected to the bottom of the dielectric barrier discharge plasma equipment body, and the support plate is slidably connected to the inner wall of the No. 1 groove; the No. 1 rod is rotatably connected to the inner wall of the No. 1 groove; one end of the No. 1 rod passes through the side wall of the base, and is fixedly connected with an L-shaped rod; the cam is sleeved on the No. 2 rod and is fixedly connected to the No. 2 rod; the height of the dielectric barrier discharge plasma equipment body can be adjusted, so that the device is suitable for people of different heights.

The utility model relates to the technical field of medical auxiliary tools, and particularly discloses an infant restraint pad which comprises a mattress, an upper limb restraint strap is arranged in the middle of the mattress, a lower limb restraint strap and a head restraint assembly are arranged at the two ends of the mattress respectively, and the head restraint assembly comprises a pressing block and two limiting blocks which are movably installed on the mattress. The two limiting blocks are symmetrically arranged on the two sides of the mattress and can be movably adjusted and fixed in the width direction of the mattress so as to abut against the two sides of the head of the infant respectively, and the pressing block is arranged at the end of the mattress and can be movably adjusted and fixed in the length direction of the mattress so as to be in pressing fit with the forehead of the infant. The infant restraining pad can effectively restrain the body limbs and the head of an infant.