107results about How to "Consider comfort" patented technology

The invention relates to the technical field of illumination control, in particular to a public place illumination intelligent regulation and control method capable of distinguishing multiple environments. The method comprises the following steps: firstly, classifying public places, analyzing activity and personnel behavior characteristics of the public places, determining an illumination function and influence variables, and defining a target model; secondly, establishing an analytic hierarchy structure, and constructing a judgment matrix to calculate a weight vector and check consistency by taking an illumination function as a target layer, relevant factors as a criterion layer and public places as a scheme layer, and distributing regulation and control weights; and finally, determining lighting functions and a target model thereof according to the priority, setting an initial value, adjusting variables, solving a current value, judging whether the current value meets a threshold value or not, and regulating and controlling in sequence until all lighting functions are met. According to the method, the requirements of different places can be accurately met, the regulation and control weight is scientifically determined, multi-target regulation and control are efficiently realized, and a flexible regulation and control strategy is also provided.

The invention discloses a multi-protection self-cleaning medical protective garment with a good antibacterial effect, and relates to the technical field of medical protective garments, the multi-protection self-cleaning medical protective garment comprises a protective hat, an upper garment and a lower garment, the protective hat, the upper garment and the lower garment are integrally formed and designed, and the protective hat, the upper garment and the lower garment are all of a multi-layer composite structure. The protective hat, the upper garment and the lower garment are integrally formed and designed, the problem of leakage at the joint is solved, the waterproof and antibacterial performance is guaranteed through the hydrophobic protective layer, the antibacterial isolation layer and the comfortable layer, the wearing comfort is also considered, meanwhile, organic silicon hydrophobic sol coated on the hydrophobic protective layer has the waterproof and antibacterial functions, and the waterproof and antibacterial effects are good. The self-cleaning effect of reducing stain attachment can be achieved, various protection requirements in the medical environment are met, the temperature and humidity change conditions of multiple parts in the protection suit are obtained in real time through the data acquisition module, the temperature and humidity in the protection suit are automatically regulated and controlled through the microprocessor module, and the protection suit is more intelligent. And the protection effect and the comfort of the protective clothing in use are improved.

The invention relates to a disconnectable hydraulic stabilizer bar assembly. The disconnectable hydraulic stabilizer bar assembly comprises a hydraulic cylinder body, a front flange is installed on the front portion of the hydraulic cylinder body, a rear flange is installed on the rear portion of the hydraulic cylinder body, a piston rod is sleeved with the front flange, an inner thread sleeve is installed on the rear portion of the piston rod, and balls are installed between the inner thread sleeve and an outer thread sleeve; a piston plate is arranged in the middle of the piston rod, a first oil guide block and a second oil guide block are welded to the side wall of the hydraulic cylinder body, an oil path block is installed on the rear flange, an oil return hole is formed in the rear flange, and an energy accumulator used for storing hydraulic oil energy, a first electromagnetic valve and a second electromagnetic valve are installed on the oil path block and used for controlling on-off of an oil path in the oil path block. A first connecting rod is installed on the front portion of the piston rod, and a second connecting rod is installed on the rear portion of the rear flange. The stabilizer bar assembly has the beneficial effects that the stabilizer bar assembly ensures that the excellent stability of a vehicle can be kept, and the comfortable feeling of riding and the trafficability of severe road conditions can be considered at the same time.

The invention discloses a building energy management and control optimization method and system considering indoor heat transfer, and the method comprises the steps: building a building third-order thermal parameter model according to a dynamic heat transfer process between rooms; a central air conditioner operation model comprising a water chilling unit energy consumption model, a variable frequency water pump energy consumption model, a cooling tower fan energy consumption model and an indoor unit fan energy consumption model is constructed; according to the invention, the functions of improving the green low-carbon operation effect of the building and giving consideration to the comfort level of the user are realized; through the constructed building energy management and control optimization model, on the basis of considering photovoltaic power generation and rigid load uncertainty, diversified thermal comfort requirements of different rooms and building intra-day operation cost are considered, and multi-target optimization solution is carried out by adopting a deep strategic gradient decision, so that optimal low-carbon operation of the building is realized; the heat transfer effect of the room is considered, comfortable, green and low-carbon operation of the building is promoted, the energy management and control effect of the building is guaranteed, and the system is suitable for being widely popularized and used.

The utility model provides an eyeshade capable of being matched with a nose bridge, which comprises an eyeshade body and further comprises at least one first connecting piece arranged on the inner side surface, facing the eyes of a user, of the eyeshade body. The deformable nose pad bag is filled with flowing particles; the second connecting piece and the first connecting piece are arranged on the surface of the deformable nose pad bag in a matched manner; the deformable nose pad bag is fixedly installed on the inner side surface, facing the eyes of the user, of the eyeshade body through corresponding cooperation of the second connecting piece and the first connecting piece, so that when the eyeshade is worn on the head of the user, the shape of the nose bridge can be matched through deformation of the deformable nose pad bag, and the eyeshade is arranged among the nose bridge, the eye edges of the user and the eyeshade body in a cushioned mode. By utilizing the fluidity of the high-fluidity particles in the deformation nose pad bag, the fluidity particles automatically flow to a gap position with smaller pressure between the eyeshade and the face when the eyeshade is worn, so that the eyeshade, the nose bridge and the lower edges of the eyes are automatically and seamlessly attached to be matched with the face shape, the nose bridge is not pressed after long-term wearing, and the shading property and the comfort are both considered.

The invention discloses a dual-refrigeration heat management method and device for an electric vehicle, and relates to the technical field of heat management.The dual-refrigeration heat management method for the electric vehicle comprises the following steps that the temperature of a passenger compartment evaporator is obtained; comparing the temperature of the passenger compartment evaporator with a temperature threshold; according to the relation between the temperature of the passenger compartment evaporator and the temperature threshold value, the temperature and / or flow of battery pack cooling liquid is adjusted, then the refrigerating capacity of the battery pack is adjusted, the refrigerating capacity is increased by adjusting the rotating speed of a compressor in advance, and meanwhile an electronic expansion valve is adjusted according to the current water temperature and the target water temperature to ensure that the battery pack can obtain enough refrigerating capacity; the refrigerating effect of a passenger compartment is met, meanwhile, temperature rise of the power battery in the running and charging process is effectively controlled, excessive temperature rise in the initial charging stage of the battery is avoided, the safety of the battery is improved, the service life is prolonged, and the charging efficiency is improved.

The invention discloses a central air conditioner control method and system considering the time-lag effect, and the control method comprises the steps: constructing a time-lag effect model which is used for reflecting the time-lag effect characteristics of a central air conditioner system; formulating a central air conditioner demand response strategy according to the time-delay effect model; on the basis of the time-lag effect model and the demand response strategy, key indexes used for evaluating the interaction effect of the central air conditioning system are determined; integrating the key indexes, and constructing a demand response interaction capability evaluation system; and integrating the time-lag effect model, the demand response strategy and the demand response interaction ability evaluation system into the central air-conditioning control system to obtain the central air-conditioning control system considering the time-lag effect. According to the control method and the control system, the energy utilization efficiency and the demand response capability of the central air conditioning system can be effectively improved, meanwhile, the user comfort and the economic benefit are considered, and an important guarantee is provided for building energy conservation and power grid stability.

The utility model provides a brassiere with adjustable back wings, which comprises cups, back wings and shoulder strap structures, the cups are positioned in the middle, the connection part of the two cups forms a heart-shaped part, the two back wings are respectively arranged on the outer sides of the two cups, and the two shoulder strap structures are respectively used for connecting the top ends of the cups with the positions, close to the outer sides, of the upper ends of the back wings on the same side. A binding structure is arranged on the back part, the binding structure is of a crossed structure and used for adjusting proud flesh on the two sides of the chest and the back, an adjusting part is arranged at the position, close to the back part, of the shoulder strap structure and comprises a fixing end and an adjusting end, one end of the fixing end and one end of the adjusting end are connected with the shoulder strap structure, and the other end of the adjusting end is slidably connected with the lower portion of the back part. When the elasticity of the back ratio is reduced due to the fact that the bra is worn for a long time, the back ratio is adjusted through the sliding connection of the adjusting end, the comfort of the linear bra can be considered for a long time while the attractiveness is ensured, and the problem that the elasticity of the back ratio is easy to lose efficacy is effectively solved.

The utility model relates to the field of textile fabric, especially a kind of high-strength wear-resistant fabric, including wear-resistant surface layer and antibacterial substrate layer, wear-resistant surface layer and antibacterial substrate layer between being equipped with hot melt gauze, antibacterial substrate layer is made of fiber with antibacterial function, hot melt gauze top and bottom respectively with wear-resistant surface layer and antibacterial substrate layer fixed connection, hot melt gauze is woven from hot melt fiber;Wear-resistant surface layer is woven from first fiber bundle and second fiber bundle, and the first fiber bundle includes main wear-resistant fiber as core line, and auxiliary wear-resistant fiber around core line, the weaving density of first fiber bundle in wear-resistant surface layer is 60-90 per square centimeter Root;Second fiber bundle includes main tensile fiber as core line, and auxiliary tensile fiber around core line, the weaving density of second fiber bundle in wear-resistant surface layer is 50-70 per square centimeter Root. Its solved the technical problem that existing fabric cannot consider wear resistance and tensile property.

The invention discloses a charging gun insertion and extraction force test device, and relates to the technical field of electric vehicle detection, and the device comprises a supporting unit which comprises a sliding block, a pair of supports disposed on the upper surface of the sliding block, a hinge rod disposed at the tops of the supports in a penetrating manner, a connecting table disposed between the supports, a guide rod disposed at one side of the supports, and a bearing assembly disposed at the end part of the guide rod. The beneficial effect of the invention is that the adaptability and accuracy problems in the insertion and extraction force test of the charging gun of the electric vehicle can be solved. The multi-stage reinforcement of the charging gun in different shapes and sizes is realized, the mounting and withdrawing processes of the charging gun are simplified, the operation comfort is considered, and the fixing effect in the test process is ensured.

This invention relates to the field of embodied intelligence, specifically disclosing a method, apparatus, device, and medium for adaptive volume adjustment of a robot. The method includes: acquiring environmental noise, extracting and separating robot self-noise from it to obtain target noise; determining the noise level based on the target noise; if it is a first noise level, setting the target volume as the sum of the current volume and a first fixed volume compensation amount; if it is a second noise level, setting the target volume as the sum of the current volume and a nonlinear volume compensation amount, wherein the nonlinear volume compensation amount is determined based on a dynamic adjustment coefficient negatively correlated with the intensity of the target noise; if it is a third noise level, setting the target volume as the smaller value between the sum of the current volume and the second fixed volume compensation amount and a preset maximum volume threshold; and adjusting the robot's output volume to the target volume. Compared with existing technologies, this invention avoids misjudgments caused by robot self-noise, accurately adapts volume control to the actual environment, and improves the user experience.

The utility model discloses the structure of child and mother window of business car, it mainly applies to the rear window area of the car body of business car. The structure of child and mother window of business car contains a fixed window, and the fixed window is installed to the car body and forms an opening, the inner side end face mother frame of setting in the fixed window, and is equipped with the slide rail in the mother frame, a movable window frame, the movable window frame can be slidably configured in the slide rail, and a movable window, the movable window is installed in the movable window frame, when closing state, the movable window can close the opening, and with the outer surface of fixed window keeps the same plane, to ensure that the car body appearance integrity, and promote air tightness and sound insulation. Through this design, the utility model can effectively improve the inconvenience that the traditional business car rear window cannot open, provide the window structure of car appearance consistent, sound insulation, waterproof and ventilation demand.

The utility model relates to the technical field of indwelling needle fixation, specifically is a kind of indwelling needle fixing bandage.The utility model discloses indwelling needle fixing bandage including finger sleeve, it is equipped with the first extension section extending to the dorsal direction of the patient's limbs on finger sleeve, and the second extension section extending to the palm direction of the patient's limbs, since the first extension section and / or second extension section are greater than preset length, can be wound around the patient's limbs at least one week when the first extension section is connected with the second extension section.The technical scheme will finger sleeve be worn on the thumb of the patient's limbs, and be fixed by the first extension section and the second extension section around the limbs, the indwelling needle on the dorsal of the limbs is fixed, and the indwelling needle on the limbs of different sizes can be fixed;And since the first extension section and the second extension section are opposite in tension direction when fixing indwelling needle, finger sleeve will not be tight due to one-way pulling thumb, and then the stability and comfort of indwelling needle fixation are considered.

The invention discloses an E-Bike chain-free power assisting system which comprises a power assisting bicycle. The power-assisted bicycle comprises a generator, a generator controller, pedals, a motor, a motor controller and a battery. The pedals are in transmission connection with a rotor of the generator through a crank, and the generator and the battery are installed on the power-assisted bicycle. The motor is in driving connection with a rear wheel of the power-assisted bicycle; when the pedals are treaded, the generator generates electricity, and the motor drives the power-assisted bicycle to advance; when the pedals are not treaded, the motor stops driving the power-assisted bicycle to advance until the motor stops driving the power-assisted bicycle; the motor controller is used for adjusting the speed of the power-assisted bicycle according to the change of the pedaling frequency and pedaling force of the pedals collected by the generator controller; a rider can start the bicycle more easily and has more comfortable pedaling frequency at a high speed; when the electric quantity of the battery is low, the output power of the generator is increased by increasing magnetic resistance, so that the long endurance of the power-assisted bicycle is realized; and the comfort is ensured while long endurance is considered.

The invention discloses a hot-melt self-adhesive crochet yarn and a preparation method thereof, and belongs to the technical field of textiles. High-strength yarns are used as core warp yarns, and hot melting yarns are used as chaining warp yarns and weft insertion yarns; the core warp does not perform looping motion; the chaining warp yarns are located on two sides of the core warp yarns and looped to form chaining tissues, and crochet yarns are obtained through weft insertion knitting; and then carrying out hot melting treatment to obtain the hot-melting self-adhesive crochet yarn. The hot-melt self-adhesive crochet yarn prepared by the invention is good in shape retentivity and structural stability, simple in preparation process, low in cost, free of influence on hand feeling and the like.

The invention relates to a vibration massage bed with adjustable frequency. Belongs to the technical field of fitness equipment. The problems that existing vibration equipment is limited in action level and local action, insufficient in vibration reduction performance and single in control mode are mainly solved. The bed is mainly characterized by comprising a bed body, a vibration driving assembly and an elastic supporting structure, the bed body is fixedly mounted at the upper end of the elastic supporting structure; the vibration driving assembly comprises a vibration motor, a frequency converter and a control device, and the vibration motor is fixedly installed on the bed body. The vibration massage device has the advantages of optimizing the damping structure and giving consideration to safety and comfort, and is mainly used for all-around vibration massage on the human body.

The invention discloses an intelligent operation and maintenance efficient helmet, relates to the technical field of power grid operation and maintenance, and aims to improve the efficiency and coverage rate of intelligent remote inspection. The intelligent operation and maintenance efficient helmet is provided with multiple functional components including the main camera, the light supplementing lamp, the distance sensor, the earphone and the integrated control chip, and it is ensured that operation and maintenance personnel can monitor and record the inspection process in real time. A main camera is installed on the top of the helmet and can capture environment information and transmit images to a transformer substation control end in real time. The distance sensor positions an operator in real time and detects the distance between the operator and the inspection equipment or the obstacle, and voice broadcasting is carried out through the earphone. In a transformer substation on duty, an operation and maintenance worker wears the helmet to realize automatic recording of inspection and maintenance results, and the worker on duty can complete a specific inspection task according to video and voice command under the unattended condition. Through the design of the intelligent operation and maintenance efficient helmet, the inspection efficiency of equipment can be remarkably improved, and smooth proceeding of all operation and maintenance tasks is ensured.

The present invention discloses a flip seat, comprising a fixed frame and several movable frames, the fixing parts on both sides of the movable frame are fixed to the fixed frame by screws, a finger-preventing guard plate is arranged on the fixed frame at the rear side of the movable frame, the front side of the guard plate is an arc surface, a seat bottom box is arranged at the lower end of the movable frame, the two sides of the seat bottom box are fixed to the movable frame by screws, a flip seat surface is arranged on the upper surface of the movable frame, several cover plate supports are installed on the fixing plate at the upper end of the fixed frame, an outer C-shaped groove is arranged at the lower end of the cover plate, the fixing part at the upper end of the backrest is fixed in the outer C-shaped groove, the backrest is fixed to the fixed frame by screws, and bite-shaped protrusions are arranged on the surface of the backrest and the flip seat surface. The present invention has a simple structure, a reasonable design, is easy to assemble, has a high strength of the seat structure, can prevent slipping and finger pinching, has high comfort, and has good safety performance.

The utility model discloses an obstetrical nursing enclosure, including fender assembly for limiting infant sleep position, including fender main part, fender main part is right triangle prism structure, and the inclined surface of fender main part is provided with the blocking part, and the sidewall of fender main part is inlayed and is provided with the enclosure mounting hole. The utility model's enclosure assembly passes through the design of the up and down movement of screw column in sliding mouth, can fast regulation height, and the enclosure of lowering in daytime is convenient for nursing personnel to arrange bed, feed or check infant, and the enclosure of lifting in night ensures safety. Compared with traditional fixed height enclosure, the device can realize function switching without disassembling, and the operation is simple and direct, and knob control does not need additional tool, and is suitable for hospital, confinement center and other high frequency nursing scene. The limiting function of fender assembly further reduces the hindrance in the nursing process, ensures infant in the safety area, significantly improves the nursing efficiency, reduces the operation burden of medical staff or parent, and satisfies the diversified nursing demand.

The invention provides an electrically-driven screw transmission gear shifting executing mechanism which comprises a motor, a gear shifting mechanism, a gear shifting mechanism, a gear shifting mechanism, a gear shifting mechanism, a gear shifting mechanism, a gear shifting mechanism, a gear shifting mechanism and a gear shifting mechanism. The motor rotor sleeves the motor shaft, and the motor shaft synchronously rotates along with the motor rotor; the control unit is connected with the motor stator and inputs an electric signal to the motor stator so as to drive the motor rotor to rotate; the screw rod assembly comprises a screw rod and a poking finger, the poking finger is arranged on the screw rod in a sleeving mode, and the poking finger is matched with the screw rod through threads so that rotation of the screw rod can be converted into linear reciprocating motion of the poking finger along the screw rod; and the gear pair is used for connecting the screw rod with the motor shaft in a transmission manner, so that the rotation of the motor shaft is converted into the rotation of the screw rod. Compared with the prior art, the gear shifting speed is high, precision is high, noise is low, energy efficiency is reduced, installation is convenient, the application range is wide, the vehicle performance is improved, and meanwhile driving and riding comfort is taken into account.

The utility model discloses an intelligent fireproof suit with a multi-mode sensing function, which relates to the field of protective clothing and comprises a fireproof suit body, a multi-mode sensing fabric is arranged in the fireproof suit body, and the multi-mode sensing fabric, a signal acquisition module, a central processing unit, an alarm module and a power supply are integrated on the fireproof suit body. The multi-mode sensing fabric obtains environment data, the environment data is sent to the central processing unit through the signal acquisition module to be analyzed and judged to obtain a judgment result, and the central processing unit sends the judgment result to the alarm module through the first output port to give an environment data alarm. The signal acquisition module, the central processor and the alarm module are connected with the power supply. The flexible breathable fabric has the performances of flexibility, breathability and the like, and the wearing comfort of a human body is greatly improved. The cost is low, and popularization and application of the intelligent fireproof clothing are facilitated.

The utility model provides a depilation and skin polishing panel and depilation and skin polishing device, including panel body, be provided with the convex unit on panel body, and the convex unit includes outer convex and inner convex, and outer convex and inner convex are all closed line structure, and inner convex is located the inside of outer convex, and the number of inner convex is at least two, and at least two inner convexes are arranged in non - wrapped spacing between, and at least one inner convex has at least one angle. The depilation and skin polishing panel improves the depilation and skin polishing effect, and improves the user experience.

The invention belongs to the technical field of knitted bags, and particularly relates to a knitted bag processing method and a knitted bag thereof.The knitted bag processing method comprises the following steps that S1, a first knitted material and a second knitted material for the knitted bag are selected, the first knitted material is soaked in a first functional treatment solution, and the second knitted material is soaked in a second functional treatment solution; s2, drying the first knitted material and the second knitted material which are impregnated; s3, the dried first knitting material is used for knitting of the bottom area of the knitted bag, the dried second knitting material is used for knitting of the side face area of the knitted bag, and a knitted bag body with the zoning function characteristic is obtained through integrated forming. According to the difference of use requirements of different parts of the knitted bag, two kinds of functional treatment liquid are adopted for carrying out differentiation treatment on bottom and side face materials, and integrated functional partition of bottom strengthening wear resistance and side face emphasized protection is achieved. According to the design, the overall portability and breathability are guaranteed, and meanwhile the durability and the easy-to-care performance of all the areas are improved in a targeted mode.

The invention relates to the field of mattresses, and discloses a combined mattress for vital sign monitoring, which comprises a top mattress body, a bottom mattress body, a cushion layer cover, a limiting unit, a hard support unit, a soft support unit, an assembly component, a first lifting unit, a second lifting unit and a non-contact monitoring element, a second inner cavity is formed in the bottom mattress body. According to the invention, the top mattress body and the bottom mattress body are integrally assembled and then have the functions of soft and hard switching and sinking amplitude adjustment, so that medical and high-end daily scene requirements are met, supporting modes are switched according to different scene requirements, clinical requirements of first-aid measures are met, and meanwhile, the mattress is adapted to scenes such as patient body position adjustment and the like which need to be stably supported; according to the body type, the lying posture or the rehabilitation requirement of the patient, graded regulation and control from mild sinking to moderate sinking are achieved, and comfort and supporting safety are both considered.

This utility model discloses an adaptive support mattress, including a mattress body with a groove in the middle and a base plate inside the groove. Multiple first support columns are provided on the base plate, and a first support block is provided at the upper end of each first support column. Multiple rotating seats are symmetrically arranged on the base plate, and protruding columns are rotatably connected between the rotating seats. A motor is provided on the outside of each rotating seat, and the output end of the motor is fixedly connected to the protruding column. A movable plate is provided at the upper end of each protruding column, and the movable plate is slidably connected to the first support column. Multiple second support columns are fixedly connected to the movable plate, and a second support block is provided at the upper end of each second support column. A contact soft layer is provided at the upper end of each first support block. This utility model achieves flexible switching between support and massage functions by controlling the lifting and lowering of the second support blocks, and the height of the second support blocks is adjustable, providing high flexibility.

The utility model discloses a protective face screen, and belongs to the technical field of face screens. The protective face screen comprises a helmet, a heat dissipation assembly is arranged above the helmet, a protective assembly is arranged in front of the lower end of the helmet, and heat insulation cloth is fixedly connected to the rear portion of the lower end of the helmet. The protective assembly comprises a protective panel located at the front end of the lower portion of the helmet, the upper end face of the protective panel is fixedly connected with an overturning strip, the lower end face of the protective panel and the lower end face of the heat insulation cloth are fixedly connected with balance weight arc-shaped cloth, a zipper piece is fixedly connected between the protective panel and the heat insulation cloth, and the protective panel is connected with the heat insulation cloth through the zipper piece. Counter weight arc-shaped cloth is matched to be attached to the front of the chest, the back and the shoulders, full-wrapping type protection is formed, external heat and sundries are effectively blocked, the head and upper body protection effect is improved, the bottom of the counter weight arc-shaped cloth is attached to the shoulders, the sealing and heat insulation effect is enhanced, the falling feeling of the helmet is reduced through the counter weight design, and the fatigue degree of long-time wearing is reduced.

The utility model discloses a kind of antiskid protective gloves, belong to glove technical field, including glove body, the palm of glove body is equipped with protective pad, the finger of glove body is equipped with soft pad, antiskid strip is equipped on protective pad and soft pad, the palm of glove body is installed with transverse strip, the bottom of glove body is installed with elastic band. Through the communication of air bag in hand back and five pressure tubes in finger, closed loop air pressure system is formed, when gripping, finger extrudes pressure tube→gas is pressed into air bag→air bag compression generates reverse pressure, evenly pressurize on finger, enhance holding stability and fit, when relaxing, air bag elasticity restores→suction air in pressure tube→pressure tube shrinks→reduce the restraint to finger, improve flexibility, realize the dynamic adjustment of "grip automatic pressurization, open automatic release", give consideration to protection and comfort.

The utility model discloses children clothing trousers with a knee protection function, which relates to the field of clothing and comprises a trousers body, knee pads are arranged on two trouser legs of the trousers body, each knee pad comprises a wear-resistant layer, an outer protective layer, an air cushion layer, an inner protective layer and a connecting layer, and the protective layers and the air cushion layers buffer impact force during collision. The wear-resistant layer prolongs the service life of the kneecap, the back and the trouser legs of the kneecap are provided with hook-and-loop fasteners for fixing, one side of the kneecap is fixedly provided with a plurality of first elastic bandages, the other side of the kneecap is fixedly provided with a plurality of second elastic bandages, and the two elastic bandages are provided with hook-and-loop fasteners for fixing, so that the kneecap is convenient to mount and take down; a first elastic belt is fixedly arranged at the top of the waist of the trousers body, a plurality of binding belts are connected to the surface of the first elastic belt, and a waistband is arranged on the peripheral side of the first elastic belt and fixed through hook-and-loop fasteners, so that the children can operate the trousers conveniently.

The invention discloses a vehicle and pedestrian warning system based on active noise reduction and a control method, and relates to the technical field of vehicle active safety and noise reduction, and the method comprises the steps that a warning sound generation module synthesizes a source audio signal according to vehicle driving data and divides the source audio signal into two synchronous paths; the first path drives the outside-vehicle audio output unit to radiate sound waves outwards; and the second path is directly transmitted to the reverse sound wave generation module as a reference signal. The in-vehicle sound collection unit collects and feeds back in-vehicle residual noise signals. And the reverse sound wave generation module generates a reverse counteracting audio signal through an adaptive filtering algorithm by using the reference signal and the residual noise signal, and drives the in-vehicle audio output unit to play reverse sound waves, and the reverse sound waves and warning sound noise transmitted into the vehicle are superposed and counteracted. According to the invention, the source signal is directly used as a reference signal, delay and distortion caused by physical acquisition are eliminated, and quietness in the vehicle is effectively improved while the warning effect outside the vehicle is guaranteed.

According to the nozzle and the oral cavity cleaning device, the nozzle comprises a nozzle piece and a rotational flow piece, a first channel, a second channel and a third channel are formed in the nozzle piece, the second channel is provided with a rotational flow cavity, the first channel is communicated with the rotational flow cavity in the tangential direction of the rotational flow cavity, and the third channel is coaxially communicated with the second channel in the axial direction of the rotational flow cavity; the maximum cross section area of the first channel and the maximum cross section area of the third channel are both smaller than the minimum cross section area of the rotational flow cavity; the rotational flow piece is arranged in the second channel and provided with a rotational flow part arranged in the rotational flow cavity. By means of the communication relation between the first channel and the rotational flow cavity and the configured rotational flow piece, the fluid medium entering the rotational flow cavity at a certain pressure can be rotated and dispersed, and therefore rotating water flow with a large angle is output through the third channel; meanwhile, by means of the structural characteristic that the cross section size of the third channel is smaller than that of the rotational flow cavity, the water outlet pressure can be enhanced, the impact force of rotational water flow is guaranteed, and therefore the effect of considering cleaning force and comfort is achieved.