35results about How to "Reduce squeeze" patented technology

The invention relates to automatic accurate cutting equipment of a PVC (Poly Vinyl Chloride) wired hose. The equipment comprises a baseplate, wherein a support device, a tension device, an auxiliary device, a driving device and a shearing device are sequentially arranged on the baseplate from back to front and are cooperated to complete the automatic accurate cutting of the PVC wired hose. By means of the equipment disclosed by the invention, the problems that in a conventional PVC wired hose shearing process, cuts are uneven during manual shearing process of the PVC wired hose, error exists during the manual measurement process of the PVC wired hose, the using effect of the PVC wired hose is influenced, the PVC wired hose is easily deformed during manual tensioning process, the manual shearing of the PVC wired hose is high in the labor intensity and low in the working efficiency and is not suitable for batch operation and the like can be solved; and the function of automatically and accurately cutting the PVC wired hose can be realized.

The invention discloses an ultraviolet-proof seawater-corrosion-proof water-blocking loadable low-voltage cable for ships. The cable comprises insulating wire cores, a rubber sleeve and an outer sheath layer, the rubber sleeve is arranged on the inner side of the outer sheath layer, and blocking plates which are parallel to one another are evenly arranged on the inner side of the rubber sleeve atequal intervals. According to the invention, hard limiting strips are arranged between the two adjacent insulating wire cores in the cable body; on one hand, two adjacent insulated wire cores are blocked by the limiting strips; abrasion between two adjacent insulated wire cores is avoided; mutual influence of heat among the insulating wire cores is avoided; on the other hand, the limiting strips are used, so that the end surfaces of the two adjacent limiting strips are propped against each other after the cable is extruded to generate slight deformation; the hard limiting strips are used as asupporting structure to bear extrusion force, the clamping groove is used for protecting the insulating wire cores, extrusion force borne by the insulating wire cores is reduced, and the hard limitingstrips are matched with the closed cavity and the blocking plates to improve the loading capacity of the cable.

The invention discloses a dewatering device for paper making. The device includes a support, a driven water absorbing roller group is arranged above the support, and the outer side of the circumference of each driven water absorbing roller is wrapped with a water absorbing material layer; a press roller is arranged at the lower side of the driven water absorbing roller group, and the driven water absorbing roller group is mutually squeezed with the press roller; the interior of the press roller is provided with a pressing boot, a boot beam is arranged below the pressing boot, and the upper end of the boot beam abuts against the lower end of the pressing boot to support the pressing boot; a boot sleeve is arranged on the periphery of the pressing boot in a wrapping mode, and a water absorbing layer and a plastic layer are arranged on the surface of the outer circumference of the press roller successively from inside to outside; the interior of the plastic layer is provided with a micro circular hole, a driving water absorbing roller group is arranged below the press roller, and a servo numerical control motor is arranged on the left side of a driving water absorbing roller shaft. The dewatering device for paper making is simple in structure, can effectively remove moisture in wet paper pages, and greatly reduces production energy consumption.

The invention discloses an intermittent drug delivery analgesic pump with an adjustable drug concentration. The analgesic pump comprises a first lower shell, a drug storage assembly, a first upper shell, a second lower shell and a second upper shell, wherein the drug storage assembly is arranged above the first lower shell, the first upper shell is arranged above the drug storage assembly, the second lower shell is arranged at one side of the first lower shell, and the second upper shell is arranged above the second lower shell. The intermittent drug delivery analgesic pump with the adjustabledrug concentration has the advantages that the analgesic pump is scientific and reasonable, the use is safe and convenient, a first drug pumping bag is used for measuring the volume of anesthetic, asecond drug pumping bag is used for measuring the volume of physiological saline, a second squeezing assembly is used for squeezing the first drug pumping bag and the second drug pumping bag, and a pulse drug pumping bag is used for mixing the anesthetic and the physiological saline, thereby effectively achieving the adjustment and control over the anesthetic concentration, reducing the pain of apatient suffered during an operation, effectively controlling the drug delivery time during the operation, and reducing the work intensity of the medical staff.

The invention discloses a system and a method for intelligently monitoring exit-entry self-service acceptance equipment, and the system comprises an equipment access unit which is used for completingthe access of the self-service acceptance equipment; an equipment access state monitoring unit, used for monitoring the access state of the self-service acceptance equipment according to the authentication file on the self-service acceptance equipment; an equipment running state monitoring unit, used for monitoring the running state according to the heartbeat signal; and a data acquisition monitoring unit, used for comparing the service data of the self-service acceptance equipment with a preset blacklist so as to monitor the service data. According to the invention, the access safety and reliability of exit-entry self-service acceptance equipment are greatly enhanced. Through the monitoring function, the understanding speed and the processing speed of managers for abnormal conditions areincreased. Through data analysis, a scientific and visual monitoring means can be provided for entry and exit departments, data support is provided for maintenance and configuration of self-service acceptance equipment, and the working efficiency of users is greatly improved.

The present invention discloses a buckle-free face shield. The buckle-free face shield comprises a shield body, and an upper end of the shield body is provided with an air feed pipe for introducing oxygen. The buckle-free face shield also comprises a shield pad and a buckle member for fixing the face shield, one end of the buckle member is movably hinged to a side wall outside the air feed pipe, the other end of the buckle member serves as an action end of a buckle, the shield pad is prepared by soft materials and fixed at an inner side edge of a lower end of the shield body, and the shield pad is seamlessly attached to the face when the buckle-free face shield is worn on the face of a patient. Through the buckle member mainly formed by a diagonal rod and a cross bar, the face shield can be well buckled on the face of the patient. When the buckle-free face shield is used, the face shield is aligned to the mouth and nose of the patient and tightly pressed, then the cross bar of the buckle member is buckled at the jaw of the patient, and operation is complete. The operation is easy, convenient and effortless, pressing force on the mouth and nose of the patient caused by wearing the breathing face shield is reduced, and patient comfortableness is increased. A traditional air bag structure is replaced by a peg collar-shaped shield pad formed by silica gel, and air-tightness and fit degree of the face shield are effectively enhanced.

The invention relates to the technical field of building engineering, and discloses an adsorption type cleaning device for building cleaning engineering. The device comprises a gripper, the bottom of the gripper is fixedly connected with a fixed frame, the bottom of the fixed frame is fixedly connected with a water storage tank, and the bottom of the fixed frame is provided with a roller wiping automatic water spraying mechanism. By arranging the roller wiping automatic water spraying mechanism, under the condition that a rubber roller keeps rolling under the stable pressure of the glass surface, water can be automatically sprayed while the rubber roller rolls, the rubber roller is wiped back and forth through a fixing block, the wiped place is scraped to be dry through a rubber scraper, the wiped position can be integrally and fully automatically sprayed with water, wiped and dried, then the working efficiency is greatly improved, a large amount of manpower, time and energy are saved, the problem that a common towel cannot wipe stubborn stains is solved through the arrangement of the fixing block, and the working enthusiasm of workers is improved.

The invention relates to a refrigerator which comprises a refrigerator body, a hinge, a door body and a winding pipe. The hinge, the door body and the winding pipe are fixed to the refrigerator body,the door body is pivotally arranged on the hinge, and the door body is provided with an electric wire extending to the refrigerator body through the hinge. The winding tube is wound on the outer surface of the part of a section, corresponding to the hinge, of the electric wire. Since the winding tube can be directly wound on the outer surface of the part of the section, corresponding to the hinge,of the electric wire, gradual movement from one end of the electric wire to part of the section, corresponding to the hinge, of the electric wire is not needed, and therefore the assembly efficiencyof the refrigerator which can reduce abrasion to the electric wire by the door body can be greatly improved, and the production efficiency of the refrigerator is improved.

The invention discloses a shaping mold for a fruit product. The shaping mold comprises a body, wherein the upper end of the inner chamber of the body is fixedly connected with first fixed plates through first springs; one end, far away from the first springs, of each first fixed plate is fixedly connected with a first air-permeable foam plate; the middle part of the inner chamber of the body is fixedly connected with second fixed plates through second springs; one end, far away from the second springs, of each second fixed plate is fixedly connected with a second air-permeable foam plate; thebottom part of the inner chamber of the body is fixedly connected with a third fixed plate through third springs; one end, far away from the third springs, of the third fixed plate is fixedly connected with a third air-permeable foam plate; and two ends of the top part of the outer surface of the body are respectively and fixedly provided with a hang lug. According to the invention, through the actions of the first fixed plates, the first springs, the second fixed plates, the second springs, the third fixed plate and the third springs, the extrusion force of a mold to the surface of a fruit can be reduced, so the problem of influence on the taste of the fruit due to extrusion to the fruit is solved.

The invention discloses an active noise reduction earphone and a noise reduction method thereof. The active noise reduction earphone comprises a telescopic wearing housing and an earphone head. Each earphone head comprises a drum-shaped shell and an earplug cotton ring arranged on the inner side surface of the drum-shaped shell; the earplug cotton rings are provided with opening sections used forwearing glasses, a densification deformation mechanism used for adjusting the tightness and the height of the glasses during wearing is arranged at the position, right opposite to the opening sections, of the drum-shaped shell, and the densification deformation mechanism achieves noise reduction by improving the sealing performance of the glasses during wearing. The wrapping degree of the openingsections of the earplug cotton rings is adjusted through the densification deformation mechanism according to the tightness degree of the glasses, so that the glasses cannot slide off from the openingsections of the earplug cotton rings, and the sealing performance of the earplug cotton rings when the glasses are worn is improved, so that the noise reduction efficiency is improved, the extrusionforce of the existing noise reduction earphone on the temples of the head is reduced, so that the pain feeling is reduced, and the use experience is improved.

The invention discloses an instrument cleaning device for respiratory department, which belongs to the technical field of medical instrument cleaning, and comprises a cylindrical outer shell, an inner shell with the same shape as the outer shell, and the outer shell A sealing cover plate is hingedly connected to the top of the sealing cover plate, a water inlet pipe is installed on the top of the sealing cover plate, a drain pipe is installed at the bottom of the inner casing, and cleaning mechanisms are arranged at equal intervals inside the inner casing, and the cleaning mechanism The mechanism includes a rotating shaft arranged at the outer bottom of the inner casing and extending vertically upwards, a driving motor arranged at the bottom end of the rotating shaft, and brushes arranged in a helical shape on the peripheral side wall of the rotating shaft. The setting of the intubation socketing method in the present invention can save the socketing time of the intubation to be cleaned and improve the cleaning efficiency of the equipment for the intubation. In addition, the contact between the brush on the rotating shaft and the inner wall of the intubation can be used to clean the intubation. The sticky dirt on the inner wall can be moved to provide powerful conditions for cleaning after intubation.

The invention relates to laying equipment for a heat distribution pipeline, comprising a base. Vertical plates are fixed to the two sides of the upper surface of the base; rotating plates are arranged on the other two sides of the upper surface of the base; limiting grooves are formed in the upper portions of the side faces of the vertical plates; limiting rods are fixed to the upper portions of the two side faces of each rotating plate; overturning plates are arranged on the two sides of the upper surfaces of the rotating plates; cover plates are arranged above the rotating plates; inserting plates are fixed to the two sides of the lower surfaces of the cover plates; and a plurality of sets of top plates are embedded into the cover plates. The laying equipment has the beneficial effects that during inclination, the top plates arranged on the cover plates can be separated from the cover plates, and mud blocks bonded on the cover plates are stripped under the action of the top plates, so that rapid cleaning is achieved, and rapid maintenance is facilitated; a clamping member is extruded through expansion of a pipeline so as to move towards the two sides; and an upper fixed plate and a lower fixed plate are driven to move, so that the pipeline is always in a fixed state during expansion, and the pipeline is protected.

The invention discloses a forming die for manufacturing a computer shell, and relates to the technical field of computer manufacturing. The forming die comprises a forming bottom frame, a concave die plate is arranged above the forming bottom frame, a forming convex die is arranged above the concave die plate, a sprue mechanism is arranged in the middle of the top of the forming convex die, a limiting mounting groove is formed in the middle of the forming bottom frame, a limiting spiral groove is formed in the middle of the interior of the limiting mounting groove, a material shaking assembly is arranged in the position, located on the outer side of the limiting spiral groove, of the interior of the limiting mounting groove, material ejecting assemblies are evenly arranged on the periphery of the interior of the concave die plate, a movable sliding block is fixedly connected to the position, located on the outer side of a driving spiral rod, of the bottom end of the exterior of the concave die plate, and matching assemblies are evenly and fixedly connected to the surface of the outer surface area of the movable sliding block. According to the forming die for manufacturing the computer shell, the fluidity of materials inside a die cavity is improved, the imaging defect phenomenon is avoided, and the material injection efficiency is improved.

The invention discloses a functional nursing mattress with a heating function for old people, which comprises a mattress body, the side edge of the mattress body is provided with a placing groove extending to the top end, a heating pad is placed in the placing groove, the side edge of the mattress body is also provided with a limiting assembly, the limiting assembly comprises a limiting frame sewed at the bottom of the side edge of the mattress body, and the limiting frame is provided with a limiting groove. One end of the limiting belt is sewn to the top of the side edge of the pad body, the limiting belt is connected with the limiting frame in a penetrating mode, the bottom end of the limiting belt bypasses the limiting frame and is folded upwards, a hook-and-loop fastener A and a hook-and-loop fastener B are sewn to the middle and the bottom of the outer side of the limiting belt respectively, and the hook-and-loop fastener A and the hook-and-loop fastener B are connected in a bonded mode. The heating function of the mattress can be achieved through the designed heating pad and the placement groove, the comfort degree of the old people in use is improved, the designed limiting belt can achieve rapid limiting and disassembly of the heating pad, and overall operation is very convenient.

The invention discloses a washing machine dewatering control method and washing machine. The washing machine dewatering control method is characterized in that an inner barrel / drum is controlled by a motor to sequentially execute control of two stages, namely low-speed intermittent dehydration and high-speed intermittent dehydration in sequence, wherein in the low-speed intermittent dehydration stage, forward low-speed dehydration and reverse low-speed dehydration are sequentially executed at a rotating speed lower than a first set rotating speed; the first set duration is stopped after the forward low-speed dehydration and the reverse low-speed dehydration, and the clothes are scattered and laid in a low-speed forward rotation mode and a low-speed reverse rotation mode, so that the clothes can be tightly attached to the inner barrel / barrel wall in the mode that the clothes are laid as much as possible in the high-speed intermittent dehydration stage, and therefore wrinkles are reduced; in the high-speed intermittent dehydration stage, forward high-speed dehydration and reverse high-speed dehydration are sequentially executed at the rotating speed higher than a second set rotating speed; and inertial dehydration is executed after forward high-speed dehydration and reverse high-speed dehydration, so that the situation that clothes are extruded into blocks due to long-time dehydration in the same direction is prevented, and the wrinkle degree of the clothes is further reduced.

The invention discloses a detachable liquid mountain bike health-care saddle. The saddle comprises a saddle body and a detachable liquid saddle device, the liquid saddle device comprises a transparentplastic sleeve, and liquid taking up 60%-80% of the total volume of the plastic sleeve is contained in the plastic sleeve; the liquid saddle device can be placed in a saddle sleeve and sleeves the saddle body, or the liquid saddle device can be connected with the saddle body in a hook-and-loop fastener bonding manner or a hidden buckle manner. According to the saddle, flowing characteristics of fluid is utilized, the shape of the saddle is constantly changed during the riding process of a user according to the pressing and friction degree between the user and the saddle to reduce the pressingand friction strength between the user and the saddle, and a sense of pain of the user during the long-term riding process is reduced.

The invention relates to a reinforcing cap for industrial detonator assembling and a preparation method thereof. The reinforcing cap comprises a cylindrical cap body, wherein the cap body is hollow, and the cap body is integrally made of 5 series of antirust aluminum materials with hardness between 70 and 90, and an opening is formed in the center of the top of the cap body. The reinforcing cap for industrial detonator assembling and the preparation method thereof can solve the problems of safety and product reliability improvement in the industrial detonator loading process, and has the characteristics of environmental protection, strong pressure resistance, safety, reliability and the like.

The invention belongs to the technical field of hydraulic cylinders, in particular to a wear-resistant sealing structure of a servo hydraulic cylinder. The following solution is provided, the wear-resistant sealing structure comprises a cylinder block and a telescopic rod, wherein a piston part slidably connected to the inner wall of the cylinder block is fixed to the bottom end of the telescopic rod, a first rubber sleeve of an annular structure fixedly sleeves the outer wall of the piston part, a hydraulic cavity is formed in the bottom in the piston piece, the bottom of the hydraulic cavity communicates with the bottom of the cylinder block, and when liquid is injected into the cylinder block to extrude the piston piece to stretch out and draw back, and the liquid and air pressure can enter the hydraulic cavity to extrude the bottom of the inner wall of the first rubber sleeve. According to the wear-resistant sealing structure, the sealing effect of the actual piston position is improved through outward inclined extrusion of the first rubber sleeve, and the first rubber sleeve is extruded outwards through inclined conversion of the bottom and the top in cooperation with hydraulic pressure and machinery, so that the effectiveness and the wear-resisting effect of the piston piece in long-term use are improved, and the wear-resisting and sealing effects of the hydraulic cylinder are greatly improved through cooperation of the hydraulic extrusion and the mechanical extrusion.

The invention relates to an automatic grabbing device with self-adaptive grabbing force in a fragile product production line. The automatic grabbing device comprises a bearing keel, a positioning sliding block, a limiting threaded rod, an extension spring and a first arc-shaped plate, one side of the bearing keel is fixedly connected with a fixing steel plate, and a fixing hole is formed in the middle of the fixing steel plate; and a supporting plate is fixedly connected to the bottom of the bearing keel, a limiting groove is formed in one side of the supporting plate, the positioning sliding block is slidably connected into the limiting groove, the positioning sliding block is slidably connected to the bottom of the supporting plate through the limiting groove, and positioning clamping teeth are arranged on one side of the bottom of the supporting plate. Through the arrangement of the bearing keel and the positioning sliding block, one side of the bearing keel is fixedly connected with the fixing steel plate, the fixing hole is formed in the middle of the fixing steel plate, and when the device works on the production line, the bearing keel is fixed to a grabbing point of the production line through the fixing steel plate, and the device is easier and more convenient to assemble and disassemble when used.

The invention relates to automatic accurate cutting equipment of a PVC (Poly Vinyl Chloride) wired hose. The equipment comprises a baseplate, wherein a support device, a tension device, an auxiliary device, a driving device and a shearing device are sequentially arranged on the baseplate from back to front and are cooperated to complete the automatic accurate cutting of the PVC wired hose. By means of the equipment disclosed by the invention, the problems that in a conventional PVC wired hose shearing process, cuts are uneven during manual shearing process of the PVC wired hose, error exists during the manual measurement process of the PVC wired hose, the using effect of the PVC wired hose is influenced, the PVC wired hose is easily deformed during manual tensioning process, the manual shearing of the PVC wired hose is high in the labor intensity and low in the working efficiency and is not suitable for batch operation and the like can be solved; and the function of automatically and accurately cutting the PVC wired hose can be realized.

The invention discloses an easy-to-wind electric wire, and relates to the technical field of easy-to-wind electric wires, the easy-to-wind electric wire comprises an electric wire winder, the electric wire winder comprises a winding support device, the outer surface of the left side of the winding support device is detachably connected with an electric wire limiting device, and the inner part of the electric wire limiting device is movably lapped with the easy-to-wind electric wire; the easy-to-roll electric wire comprises an insulation protection layer, the inner surface of the insulation protection layer is connected with an electric wire in an attached mode, and the electric wire comprises a tensile layer. The anti-corrosion layer is matched to prevent external corrosion, the fireproof layer and the waterproof layer are matched to isolate a fire source from a water source, electric leakage caused by the water source and burnout of the surface by the fire source are avoided, the elastic buffer layer is used for preventing external extrusion and impact, and the insulating layer is matched to perform electric leakage protection. The electric wire has the characteristics of electric leakage and fireproof protection on the electric wire, solves the problem of internal electric leakage when the electric wire is damaged by external force, and achieves the effect of electric leakage and fireproof protection on the electric wire.

The invention discloses a rail transit sand scattering device which comprises a storage bin, a feeding port is formed in one side of the storage bin, a discharging port is formed in the bottom of the feeding port, a material changing device is arranged in the storage bin, the material changing device is provided with a lifting plate, and the lifting plate penetrates through the storage bin and extends out of the storage bin; and a buffering device which has a buffering groove, the buffering groove is formed in one side of the inner wall of the storage bin, and an elastic film is fixedly connected between the two sides of the inner wall of the buffering groove. According to the rail transit sand scattering device, the purpose of moving and mixing scattered sand of different height layers is achieved, water accumulation and caking of scattered sand at the bottom layer can be avoided, the buffering capacity of the device is improved, abrasion of scattered sand to the inner wall of the device is reduced, the service life of the device is prolonged, scattered sand can be crushed, and scattered sand caking is prevented from being attached to the inner wall of the device.

The invention discloses an active noise reduction earphone and a noise reduction method thereof. The active noise reduction earphone comprises a telescopic wearing housing and an earphone head. Each earphone head comprises a drum-shaped shell and an earplug cotton ring arranged on the inner side surface of the drum-shaped shell; the earplug cotton rings are provided with opening sections used forwearing glasses, a densification deformation mechanism used for adjusting the tightness and the height of the glasses during wearing is arranged at the position, right opposite to the opening sections, of the drum-shaped shell, and the densification deformation mechanism achieves noise reduction by improving the sealing performance of the glasses during wearing. The wrapping degree of the openingsections of the earplug cotton rings is adjusted through the densification deformation mechanism according to the tightness degree of the glasses, so that the glasses cannot slide off from the openingsections of the earplug cotton rings, and the sealing performance of the earplug cotton rings when the glasses are worn is improved, so that the noise reduction efficiency is improved, the extrusionforce of the existing noise reduction earphone on the temples of the head is reduced, so that the pain feeling is reduced, and the use experience is improved.

The invention discloses an ultraviolet-proof seawater-corrosion-proof water-blocking loadable low-voltage cable for ships. The cable comprises insulating wire cores, a rubber sleeve and an outer sheath layer, the rubber sleeve is arranged on the inner side of the outer sheath layer, and blocking plates which are parallel to one another are evenly arranged on the inner side of the rubber sleeve atequal intervals. According to the invention, hard limiting strips are arranged between the two adjacent insulating wire cores in the cable body; on one hand, two adjacent insulated wire cores are blocked by the limiting strips; abrasion between two adjacent insulated wire cores is avoided; mutual influence of heat among the insulating wire cores is avoided; on the other hand, the limiting strips are used, so that the end surfaces of the two adjacent limiting strips are propped against each other after the cable is extruded to generate slight deformation; the hard limiting strips are used as asupporting structure to bear extrusion force, the clamping groove is used for protecting the insulating wire cores, extrusion force borne by the insulating wire cores is reduced, and the hard limitingstrips are matched with the closed cavity and the blocking plates to improve the loading capacity of the cable.

The invention discloses an aluminum profile forming method. The aluminum profile forming method comprises the first step of casting, the second step of extrusion, the third step of straightening, thefourth step of aging and the fifth step of surface treatment. The invention further discloses an aluminum profile forming die, an extrusion pipe is included, and an upper die block and a lower die block are arranged in the extrusion pipe and jointly fix a die core. The die core, the upper die block and the lower die block are detachable mechanisms, only the die core needs to be replaced during profile die replacement, and material cost is saved; through various levels of flow guiding grooves, softened cylinder aluminum can be more smoothly extruded into buffering grooves and a forming groove;through the various levels of buffering grooves, in the extrusion process, before profile extrusion forming, profiles adapt to the extrusion degree level by level, and after extrusion forming, the required tenacity, strength, appearance and the like can be achieved.

The invention relates to the technical field of medical instruments, and discloses a movable medical auxiliary device based on a mobile terminal and a using method.The movable medical auxiliary device based on the mobile terminal comprises a base, a supporting cylinder is fixedly installed in the middle of the top end of the base, and a fixing base is fixedly installed at the top end of the supporting cylinder; the fixed seat comprises two annular parts, and the two annular parts are coaxially arranged and fixedly connected through a connecting part; the movable ends of the fixing belts are driven by the transmission mechanism to move in the direction away from the annular part, so that the fixing belts are tightened, the legs of a patient are fixed, after fixing is completed, operative treatment is conducted on the legs of the patient, and the two sides of a wound of the legs of the patient are fixed through the two fixing belts; by means of the fixing band, the extrusion force on a leg wound of a patient can be reduced so as to reduce pain of the patient during an operation, the blood circulation speed of the leg of the patient can be limited through the fixing band, and a certain hemostasis effect is achieved in the operation process.

The invention discloses a portable formaldehyde detection instrument. The instrument comprises a detection casing, wherein a detection port is mounted at the top of the detection casing; keys are embedded in the front surface of the detection casing; a display screen is mounted at the top of the front surface of the detection casing; a rolling box is mounted at the top of the display screen and located on the surface of the detection casing; a rolling rod is mounted in the rolling box; elastic pieces are mounted at the two ends of the rolling rod; and a cotton piece is rolled on the rolling rod. The instrument has the advantages that when the instrument is carried, the display screen of the instrument is covered with the cotton piece, so that a squeezing force on the surface of the displayscreen can be reduced during carrying, and abrasion of the display screen, which affects the reading of detection values, can be prevented; and protection edges are mounted on the side edges of the detection instrument, so that if the device falls during use and lands on one side, the corresponding protection edge squeezes spring columns under the stress, and the spring columns are then deformedunder the stress and generate counterforces to reduce an impact force on the instrument, which improves the safety of the instrument.