30results about How to "Fit fit" patented technology

The invention provides a bus duct jack box locking device which comprises a left locking hook and a right locking hook installed outside a box body, the left and right locking hooks are parallelly and vertically arranged outside the box body, and one ends of the left and right locking hooks extend to lower side of the box body; the left and right locking hooks are movably connected with the box body; restoring springs are arranged outside the box body, and the restoring springs are respectively located on outer surfaces of the left and right locking hooks; and two ends of the restoring springs are respectively fixedly connected with the box body and corresponding left and right locking hooks, by the elasticity of the restoring springs, the shrinkage of the left and right locking hooks is realized, and the left and right locking hooks hook a bus duct shell, thus a jack box of the bus duct is locked. By locking the bus duct with the locking device, the connection between the jack box and the bus duct is more firm, and the coordination is better, thus the use safety of the bus duct is greatly improved and the operation of the bus duct is ensured.

The invention relates to the field of medical apparatuses and instruments, and particularly relates to a traction fixing belt for a lumbar vertebra. The traction fixing belt for the lumbar vertebra comprises a belt body, wherein a telescopic air bag layer is arranged in the belt body; the belt body consists of PU (polyurethane) leather, pure-cotton cloth and the telescopic air bag layer; the telescopic air bag layer is formed by using a one-step air bag molding technique; after being inflated, at joints of all transverse air passages and all longitudinal air passages of the telescopic air bag layer, all the longitudinal air passages are outwards convex; the whole air bag layer is in an inverted C shape. The structural requirements of the normal physiological curve of a human body are met much more; the belt is attached to a waist more easily; moreover, an air faucet is provided with an inflation connector; the inflation connector is of a copper structure; the conventional rotation deflation is changed through the connector; the push-pressing deflation is used; the deflation is uniform; the belt shrinks stably; the left end and the right end of the belt body are provided with a hook and loop fastener, so that the traction fixing belt for the lumbar vertebra is more convenient and quicker to use and disassemble.

The invention relates to a digital skeleton operation repair method and system. The digital skeleton operation repair method includes the steps of carrying out CT scanning to affected portions of orthopedic patients to obtain corresponding image data, performing three-dimension reconstruction and resetting according to the image data of patients, carrying out design of implants, position determination of screw holes, type selection of screws and the like under guidance of model parameters, finally, printing simulated models (including operation assistant stents) of the affected portions of the patients by the 3D printing technology, carrying out a series of pre-operative simulation processes, such as repairing, positioning and fixing to the simulation models; thereby, increasing operability and precision of skeleton operation, reducing operative risk, and providing a new practice method for customization of patients.

The invention provides a wearable power-assisted flexible exoskeleton. The wearable power-assisted flexible exoskeleton is characterized in that a fixed back plate is fixed on a multifunctional vest,an embedded control system is fixed on the fixed back plate, two motor modules are fixed above the waist part of the fixed back plate, the two motor modules are connected with the embedded control system, the embedded control system is connected with a CAN communication module, a battery is connected with the embedded control system and a driver, the driver is connected with the motor modules, twoflexible cables are connected with the two motor modules, the two flexible ropes are fixed through a waist binding belt and extend downwards, the waist binding belt is connected with two knee fabricsleeves through two thigh connecting belts, the two flexible cables are guided by the waist binding belt to be downwards connected with two adjustable springs along the thigh connecting belts and theknee fabric sleeves, the two adjustable springs are connected with two foot sleeves, and attitude sensors are fixed at thighs and shanks of the two knee fabric sleeves and / or the back waist position of the waist binding belt. Compared with a traditional rigid exoskeleton, the exoskeleton has the advantages of being portable and higher in walking assisting efficiency.

The invention discloses a jack box for a bus duct. The jack box comprises a box body, a box cover, and locking devices mounted at two ends of the box body respectively. Each locking device comprises a left locking hook, a right locking hook, a linkage plate arranged between the left locking hook and the right locking hook, and offset springs, wherein the left locking hook, the right locking hook, and the linkage plate are parallel with one another and are vertically and movably arranged on the outer sides of the box body, one end of the left locking hook and one end of the right locking hook extend into the part below the box body, the upper end and the lower end of the linkage plate are movably connected with the upper ends of the left locking hook and the right locking hook respectively through linkage rods, the offset springs are arranged on the outer side surfaces of the left locking hook and the right locking hook, and two ends of the offset springs are fixedly connected with the box body and the corresponding left and right locking hooks. When the jack box is locked, the downward pressure for mounting the jack box leads the left locking hooks and the right locking hooks to open outwards, and after the jack box is jacked, the left locking hooks and the right locking hooks close inwards under the elasticity of the offset springs to hook a casing of the bus duct, so as to improve the use safety of the bus duct and ensure the running of the bus duct.

The invention relates to an individual soldier protective product, in particular to a bullet-proof and stab-resistant clothing and a manufacturing method of protective layers thereof, the bullet-proof and stab-resistant clothing consists of fabric, a clothing liner, a plurality of mutually connected hard special alloy plates which are sequentially arranged between the fabric and the clothing liner and a front piece and a back piece of a protective vest formed by a plurality of layers of special fiber cloth protective layers, wherein the special fiber cloth protective layers comprise hard fiber cloth protective plates which are respectively hot-press cured on all the hard special alloy plates and flexible special fiber cloth protective layers positioned at the junctions of all the hard special alloy plates. The bullet-proof and stab-resistant clothing can not only greatly improve the bullet-proof and stab-resistant effects of the protective layers, but also reduce the weight of the bullet-proof and stab-resistant clothing, reduce the thickness and achieve the high-level requirements of the new standard of ministry of public security.

The invention discloses a locking device for a heart watch fixator. The locking device for the heart watch fixator comprises a base, a first locking block, a second locking block, a pressing block assembly and a locking handle, wherein the second locking block is buckled with the interior of a clamping cavity; a rotating shaft of the locking handle sequentially penetrates through a first locking through hole, a second locking through hole and a pressing block through hole, and the pressing block through hole and the cross section of the rotating shaft are non-concentric; a first notch and a second notch are respectively corresponding to the pressing block through hole and the first locking through hole; and when the rotating shaft rotates, the separation or the contact of a first notch inclined plane, a first inclined plane, a second inclined plane and corresponding through hole faces thereof can be realized so as to realize the unlocking and locking of the first locking block. According to the locking device provided by the invention, as the rotating shaft is non-concentric with the through holes of the first locking and the pressing block assembly, forward and downward propulsive force can be generated during interference, the first notch inclined plane and the first inclined plane on the two sides of the rotating shaft push forward the first locking block, so that the purpose that the first locking block and a retractor are matched more fitly and closely can be realized.

The invention discloses a tunnel waterproof material laying device. The tunnel waterproof material laying device structurally comprises a clamping mechanical arm, a mounting head, a rotating head, a clamping plate, a small shell, a support, an electric machine, a base plate, a lifting rotating system, and a under bed; the center of the base plate is provided with the lifting rotating system; the position of one third of the lifting rotating system is provided with a clamping plate in a clamping mode; the clamping plate is fixed on the base through the under bed; the small shell is arranged beside the lifting rotating system; the clamping mechanical arm is used for clamping the waterproof material, the clamping is solid, loosening or falling are not prone to happening, a rotating structureand a jacking mechanism are driven to operate through a linkage structure, rising and rotating are performed at the same time, rotary paving is carried out after the rising height is equal to the radius of the tunnel, a support frame is not required to set up, time and cost of paving are reduced, rotary paving is carried out by adopting machinery, the time consumption is short, the labor intensityis slow, the dimension error is small, and the construction efficiency is directly improved.

The invention discloses an ultrathin PU film with the thickness of 1 [mu]m-4.9 [mu]m. The ultrathin PU film comprises a base layer film and an elastic film layer, wherein the elastic film layer is fixedly arranged on the surface of the base layer film; the base layer film is an OPP film; the elastic film layer is a high-elasticity resin film; the film is prepared by the steps: 100% of high-elasticity resin, 100% of MEK and 3-6% of a leveling agent are used for adjusting the viscosity to 600, and defoaming is conducted for standby application; an OPP film is mounted on a film forming machine, aneeded 70-mesh roller is adjusted, and the temperature and the air speed are adjusted; an adjusted glue is put into a groove, and a scraper is adjusted; production is started at the speed of 60 yards; and then the ultrathin PU film with the thickness of 1 [mu]m-4.9 [mu]m is formed through rolling by lathing. The prepared ultrathin PU film with the thickness of 1 [mu]m-4.9 [mu]m is light, good inelasticity and suitable for being attached to any fabric, the original style of the fabric is not damaged, the elasticity of the fabric is improved, the ultra-thin PU film rebounds and has an anti-wrinkle function, and four-way stretch can also achieve the liner-free down-proof effect through attachment of the PU film.

The invention relates to the technical field of optical films, particularly a preparation method of a composite optical precoating film. The preparation method comprises the following steps: (1) raw material preparation of coating liquid; (2) preparation of photodiffusant coating liquid: mixing one or more of 2-5-mu m acrylic microbeads, toluene and butanone, and stirring at normal temperature for 30 minutes while controlling the rotation speed at 500-900 rpm / minute; adding an UV resin and an acrylic pressure-sensitive adhesive, stirring at normal temperature for 30 minutes while controlling the rotation speed at 500-900 rpm / minute, thereby obtaining the photodiffusant coating material; (3) uniformly coating the photodiffusant coating material prepared in the step (2) on the back of an upper film, and covering a lower film, wherein a microgravure coating mode is adopted in the coating process, and a UV-curing / thermocuring combined mode is adopted to carrying out the curing operation in the coating process; and (4) testing. By using the unique formula technique system, the reasonable material proportioning is adopted, so that the manufactured optical precoating film has certain adhesive effects, and is suitable for the demands for manufacturing of various composite diffusion films and brightness enhancement films.

The invention relates to an absorption product with a body-fitting arc-shaped narrow crotch. The absorption product comprises a liquid-tight bottom layer and an absorption core layer, wherein an elastic component which is connected with the absorption core layer is arranged at a crotch position between the liquid-tight bottom layer and the absorption core layer; elastic force is produced by the elastic component at the crotch position in a horizontal direction, so that when the absorption product is under a free loosened state or a using state under the elastic force, an arc-shaped narrow crotch structure is formed in a crotch position of the absorption product; through the arc-shaped narrow crotch structure, when being used, the absorption product can be adapted to the body of a user; theelastic component can be arranged at the center region of the crotch position, and can also be cut into a first elastic component and a second elastic component, and the first elastic component and the second elastic component are symmetrically arranged on two longitudinal flanks of the crotch position; and a flank adjacent to a leakproof separation edge, of each elastic component extends to thebase of the corresponding leakproof separation edge in the width direction of the absorption product, and is integrally connected with the absorption core layer and the liquid-tight bottom layer.

The invention discloses a method and system for compensating dynamic hysteresis based on a recurrent neural network. The method comprises the steps that: a given magnetic field signal is applied to asensor, and an output signal of the sensor is collected; a recurrent neural network is established, and a network structure is determined, the input quantity of the recurrent neural network is the output signal of the sensor, the output quantity of the recurrent neural network is the compensated output signal of the sensor; the network parameters of the recurrent neural network are initialized, the recurrent neural network is trained through training data, and the predicted value of the output quantity of the recurrent neural network is subtracted from a target value, so that a subtracting result can be obtained; the network parameters are adjusted by using a gradient descent method, and the recurrent neural network is trained through the training data according to the preset maximum number of iterations; and the recurrent neural network of the current network parameter is determined as a trained recurrent neural network when the subtracting result reaches a threshold standard or the recurrent neural network is trained to reach the maximum number of iterations.

The invention discloses an aero-engine conduit conical surface coloring detection device and detection method, wherein the detection device comprises a workload gauge, a detection conical surface arranged at the front end of the workload gauge, a clamping part arranged at the rear end of the workload gauge, a detection thread arranged on the workload gauge and located between the detection conicalsurface and the clamping part, and a detection gauge matched with the workload gauge; the detection conical surface is the same as a detected part in terms of conicity. The coloring detection deviceis convenient to operate and good in reliability, and effectively solves the coloring inspection problem of the sealing conical surface of the pipe end. The coloring inspection effect and the percentof pass of a pipe end sealing conical surface are guaranteed, powerful verification is provided for the sealing performance of the guide pipe assembly, and high use value is achieved.

The invention relates to a seamless dispensing process which comprises the following steps of determining different dispensing positions and quantities to prepare a dispensing diagram according to different produced products; importing the dispensing diagram into a computer of a dispensing machine, cutting pieces, pasting templates, shooting by the dispensing machine, and setting dispensing according to the dispensing diagram; and carrying out glue curing, manual initial bonding and lap joint, re-pressing, transferring, flatly placing and curing treatment. According to the seamless dispensing process provided by the invention, the size of glue points can be automatically adjusted according to the gram weight and the fuzzing degree of a fabric, the distance between the glue points can be adjusted at any time, and dispensed glue is activated and melted into liquid at the heating temperature of 100 DEG C or below within one hour, permeates into a texture structure of the fabric under the pressure effect and is cooled and cured into the particle bonded fabric; and due to sufficient permeation, the bonding fastness is higher than the bonding fastness of various plane glues and grain film glues, the temperature required by processing is low, and the seamless dispensing process is free of laser shining and discoloring and suitable for bonding of various fabrics.

The invention relates to the technical field of agriculture, and discloses an agricultural soybean airing and pushing device. The device comprises a fixing block, wherein the inner hollow area of the fixing block penetrates through the front end and the rear end of the fixing block and the upper end of the fixing block, and a turning device is arranged in the fixing block. According to the agricultural soybean airing and pushing device, when an arc-shaped movable block moves anticlockwise, the bottom end of the arc-shaped movable block gradually inclines upwards from left to right, soybeans at the upper end of the arc-shaped movable block roll to the right side of a baffle block along with increasing of the inclination angle of the arc-shaped movable block, the soybeans are evenly dispersed through gaps of dispersing grooves, and then the soybeans uniformly fall into an airing container from the right side of the baffle block, so that the situation that due to the fact that no large-area vacant space is provided for airing due to the influence of terrain, the soybeans on the bottom layer are overturned to the upper end through manual continuous overturning to make the soybeans be aired by sunlight more uniformly, the labor intensity of workers is increased, and the efficiency is low is avoided.

The invention discloses a far-end clavicle bone fracture plate which comprises a bone fracture plate body, the bone fracture plate body is integrally in an S shape, takes the S shape of a sagittal plane and the S shape of a coronal plane into account, has gradual change, conforms to a distal clavicle anatomical structure and is divided into a distal acromioclavicular joint section, a middle section and a proximal acromioclavicular joint section, the distal acromioclavicular joint section is sequentially provided with a distal acromioclavicular kirschner wire hole, distal acromioclavicular locking holes and a sliding hole from left to right, the middle section is provided with a plurality of middle locking holes and a sliding hole I from left to right, a middle kirschner wire hole is formed between every two adjacent middle locking holes. A proximal acromioclavicular locking hole is formed in the proximal acromioclavicular joint section, and a plurality of proximal acromioclavicular kirschner wire holes is formed in the right end of the proximal acromioclavicular joint section along the periphery. The width and curvature are designed according to the distal clavicle anatomical structure, and the device is an anatomical locking plate and can be tightly attached to the bone surface without intraoperative shaping, so that the strength of the bone fracture plate cannot be reduced, and the operation time cannot be prolonged.

The invention belongs to the field of health care products, and particularly relates to a shoulder protection structure. The shoulder protection structure comprises a left shoulder protection holster,a right shoulder protection holster and an elastic connecting belt detachably connected between the two shoulder protection holsters, each shoulder protection holster comprises a front piece part, arear piece part and a fossa part, wherein the front piece parts and the rear piece parts correspond to the front and rear of the body trunk, the fossa parts correspond to the shoulder ends of the shoulders, the lower portions of the front piece part and rear piece part are enclosed to form sleeve arm segments, the inner portion of each shoulder protection holster takes the corresponding fossa partas the center to extend to the edge of the corresponding shoulder protection holster in a radial shape to be provided with multiple magnetic blocks, and the connecting belt comprises a master belt part close to the back of the body trunk and located at the inner side and an auxiliary belt part connected to one end of the master belt part, superimposed at the outer side of the master belt part, reversibly bypassing the chest of the body trunk and connected to a front piece. The shoulder protection structure is provided with the two independent shoulder protection holsters at the left side andat the right side, the shoulder protection holster at one side can be selectively used or the shoulder protection holsters at the two sides are both used, and the elastic connecting belt detachably connected between the two shoulder protection holsters can be connected with the shoulder protection holsters at the two sides or can also be connected with the shoulder protection holster at one side.

The invention relates to the technical field of coating devices, in particular to a coating device for the production of new energy batteries, including support plates, two sets of supports are arranged on the support plates, and a plurality of rollers are arranged equidistantly between the two sets of support plates. One end is provided with a preservative film reel, the other end of the support plate is provided with a shell, and six sets of rollers are arranged in the shell, the other end of the support plate is connected with a flat plate, the flat plate is equipped with a cutting mechanism, one end of the flat plate is equipped with a waste film roll barrel, and the two sets of support plates are Set the unloading mechanism with automatic unloading function, the unloading mechanism is connected to the correction mechanism; the setting of the correction mechanism, the cells slide out of the box along several guide columns, so as to ensure that the cells that slide out of the box are located on the front of the plastic wrap. Above, and the battery is parallel to the plastic wrap, under the action of the reciprocating screw, when the slide plate moves back, the two sets of correction plates release the clamping force on the battery, and the battery just falls in the middle of the plastic wrap, so that The battery sheet fits better with the plastic wrap.

The invention discloses a general surgery department trauma operation medical device, and belongs to the technical field of trauma operation assistive devices, the general surgery department trauma operation medical device comprises a closed suction cup, two sides of the closed suction cup are communicated with flushing pipes, the top of the closed suction cup is adjustably connected with a plurality of frame mechanisms, and the plurality of frame mechanisms are connected through a pivot assembly in a limiting manner. According to the device, the relative deflection positions of the first frame plate and the second frame plate at the two adjacent ends are adjusted through cooperation of the pivot base, the limiting column and the gear sleeve, the limiting column is pulled to drive the relative unfolding angle of the bottom side sealing suction cup, and the sealing suction cup with the adjusted angle and the corresponding position outside the wound of a patient are subjected to adsorption, abutting and sealing; the outer edge of a wound can be conveniently scrubbed, anesthesia cleaning can be conducted on the inner side of the wound, the adjustable frame mechanism and the closed suction cup can be rapidly matched with the shape of the wound, and the adjusting adaptability of a surgical trauma operation is met.

The invention relates to the field of medical apparatuses and instruments, and particularly relates to a traction fixing belt for a lumbar vertebra. The traction fixing belt for the lumbar vertebra comprises a belt body, wherein a telescopic air bag layer is arranged in the belt body; the belt body consists of PU (polyurethane) leather, pure-cotton cloth and the telescopic air bag layer; the telescopic air bag layer is formed by using a one-step air bag molding technique; after being inflated, at joints of all transverse air passages and all longitudinal air passages of the telescopic air baglayer, all the longitudinal air passages are outwards convex; the whole air bag layer is in an inverted C shape. The structural requirements of the normal physiological curve of a human body are met much more; the belt is attached to a waist more easily; moreover, an air faucet is provided with an inflation connector; the inflation connector is of a copper structure; the conventional rotation deflation is changed through the connector; the push-pressing deflation is used; the deflation is uniform; the belt shrinks stably; the left end and the right end of the belt body are provided with a hookand loop fastener, so that the traction fixing belt for the lumbar vertebra is more convenient and quicker to use and disassemble.

The invention discloses a high-power semiconductor device with a heat dissipation function. The high-power semiconductor device structurally comprises a circuit board, a regulator, a heat dissipation sheet and a heat dissipation body, wherein the heat dissipation sheet is arranged at the bottom of the heat dissipation body and movably connected with the heat dissipation body, the circuit board is arranged on the regulator, the circuit board is in clearance fit with the regulator, the regulator is provided with a heat conduction pad, an operator, a mounting seat, a pin, a fastener and a semiconductor, the semiconductor is provided with the pin, the pin is connected with the semiconductor, and the fastener is arranged in the center of the operator. According to the invention, a supporting device is supported between an insulating pressing plate and a heat conduction pad so as to add the pressing supporting body of the insulating pressing plate and an electric heating plate, so that the insulating pressing plate and the heat conduction pad are connected more stably; and an attaching device on the supporting device can be further buckled on the heat conduction pad in an abutting mode, so that when the device is assembled, the insulating pressing plate and the heat conduction pad can be pressed more tightly in an attaching mode.

An ultraviolet ray-curable silicone adhesive agent composition comprising (A) a polysiloxane represented by formula (1): (R1SiO3 / 2)a1(R1 3SiO1 / 2)b1(X1O1 / 2)c1 (wherein R1 represents a monovalent hydrocarbon group, and a methyl group accounts for 20 mol% or more and an alkenyl group accounts for 0.1 to 50 mol%; X1 represents a hydrogen atom or the like; a1 represents 0.1 to 1; b1 represents 0 to 0.75; and c1 represents 0 to 0.1; and the requirement represented by the formula: a1+b1+c1 = 1 is satisfied), (B) a polysiloxane represented by formula (2): (R2 3SiO1 / 2)a2(R2 2SiO)b2 (wherein R2 represents a monovalent hydrocarbon group, a methyl group accounts for 20 mol% or more and an alkenyl group accounts for 0.01 to 25 mol%; a2 represents 0.001 to 0.67; b2 represents 0.33 to 0.999; and the requirement represented by the formula: a2+b2 = 1 is satisfied), (C) a hydrogen polysiloxane represented by formula (3): R3 dHeSiO[(4-d-e) / 2] (wherein R3 represents a monovalent hydrocarbon group; and d and e represent numerical values satisfying the requirements represented by the formulae: 0.7 <= d <= 2.5, 0.01 <= e <= 1.0 and 0.8 <= d+e <= 2.7) and (D) a platinum-group catalyst capable of being activated with light having a wavelength of 200 to 500 nm. The ultraviolet ray-curable silicone adhesive agent composition can provide a cured article having excellent adhesion force to an object of interest even when being cured under room temperature.

The invention discloses a novel automatic height-adjustable machine for sliced noodles. The machine comprises bracket baffles, a first bracket, a second bracket, a supporting bar, a rotation motor, afixing plate, a transmission screw, a rotation block, a cutting tool, a rotary table, a fastening element, a rocking bar, a movement motor and a cutting motor, wherein the first bracket and the secondbracket are in parallel to a horizontal plane, and one bracket baffle is embedded and fixed in each of two sides in a way of being vertical to a horizontal plane; the supporting rod vertically penetrates through a left side plane of the first bracket and is embedded and connected in the rotation motor; the rotation motor is fixed on the bottom of the first bracket through fixing bolts; the lowerend surface of the transmission block is vertically provided with the fixing plate; the left side of the fixing plate is fixedly provided with the cutting motor; the cutting tool is rotatably and movably connected with the output end of the cutting motor through the rotation block; the right side of the rotary table is provided with the fastening element; and the rocking bar penetrates through a through hole in the bracket baffle on the right end to be fixedly connected with the fastening element. Therefore, requirements on different cutting angles can be met, and design is optimized.

A bonding device, used for bonding a flexible material (500) to a workpiece (300), the bonding device includes a workpiece carrier (20) for positioning the workpiece, a three-dimensional displacement device (30), and a flexible material for positioning (500), the positioning mechanism (50), the gas pressure film device (60), and the electric control device (70) electrically connected to the three-dimensional displacement device (30) and the gas pressure film device (60), the gas The lamination device (60) includes a tuyere (61), and when the flexible material (500) is pasted, the electric control device (70) controls the three-dimensional displacement device (30) to drive the workpiece carrier (20) and the positioning mechanism ( 50) Move to make the flexible material (500) pre-attached on the workpiece (300), and the electric control device (70) controls the wind force of the tuyere (61) of the gas pressure film device (60) to press the flexible material (500). A material (500) is pasted on said workpiece (300).

The invention belongs to the field of health care products, and particularly relates to a shoulder protection structure. The shoulder protection structure comprises a left shoulder protection holster,a right shoulder protection holster and an elastic connecting belt detachably connected between the two shoulder protection holsters, each shoulder protection holster comprises a front piece part, arear piece part and a fossa part, wherein the front piece parts and the rear piece parts correspond to the front and rear of the body trunk, the fossa parts correspond to the shoulder ends of the shoulders, the lower portions of the front piece part and rear piece part are enclosed to form sleeve arm segments, the inner portion of each shoulder protection holster takes the corresponding fossa partas the center to extend to the edge of the corresponding shoulder protection holster in a radial shape to be provided with multiple magnetic blocks, and the connecting belt comprises a master belt part close to the back of the body trunk and located at the inner side and an auxiliary belt part connected to one end of the master belt part, superimposed at the outer side of the master belt part, reversibly bypassing the chest of the body trunk and connected to a front piece. The shoulder protection structure is provided with the two independent shoulder protection holsters at the left side andat the right side, the shoulder protection holster at one side can be selectively used or the shoulder protection holsters at the two sides are both used, and the elastic connecting belt detachably connected between the two shoulder protection holsters can be connected with the shoulder protection holsters at the two sides or can also be connected with the shoulder protection holster at one side.