28results about How to "Deformation fast" patented technology

According to the reconfigurable flexible pressure sensor based on the magnetic ionic liquid drops and the preparation method of the reconfigurable flexible pressure sensor, the superparamagnetic nanoparticles and the ionic liquid drops are combined to prepare the magnetic ionic liquid drops which are high in fluidity and can be magnetically controlled, and the magnetic ionic liquid drops serve as a pressure sensitive layer of a pressure sensing device; and the flexible stretchable pressure sensor based on the magnetic ionic liquid drop array is constructed. The invention also provides a distributed / combined non-contact multi-element in-situ reversible reconstruction method of the flexible pressure sensor, and an external magnetic field is utilized to control the magnetic ion liquid drops in the sensor to carry out programmable low-resistance rapid movement and deformation between the super-hydrophobic interconnected microfluid channel and the chamber array. The spatial distribution, component / volume and geometrical shape changes of the magnetic ionic liquid drops in the array are regulated and controlled, and distributed / combined non-contact multi-element in-situ reversible reconstruction of the flexible stretchable pressure sensor in the performances of spatial resolution, sensitivity, detection limit, pressure response mode and the like is realized through one or more change combinations.

The invention relates to the technical field of obstacle crossing wheels, and discloses an obstacle crossing wheel and a wheel type inspection robot, the obstacle crossing wheel comprises a wheel axle, one end of the wheel axle is detachably connected with a hub, the outer wall of the hub is fixedly connected with three connecting rods arranged at equal intervals, the end, away from the hub, of each connecting rod is rotatably connected with a wheel plate, and the two ends of each wheel plate are connected in sequence; a connecting groove is formed in one side of the inner wall of the wheel plate, a positioning shaft is fixedly connected in the connecting groove, the connecting rod is rotationally connected with the positioning shaft, two connecting plates are fixedly connected to one end of the wheel plate, a connecting shaft is fixedly connected between the two connecting plates, and a deformation rod is rotationally connected to the outer wall of the connecting shaft. According to the obstacle crossing wheel and the wheel type inspection robot, the deformation function of the whole obstacle crossing wheel is achieved through mutual cooperation of the deformation track and the moving ball, and therefore the stable and efficient obstacle crossing capacity is provided for the robot, and the problems of noise, vibration, faults and the like caused by gear abrasion are avoided.

The invention relates to sand filtering equipment for oil exploitation, which is applied to the field of solid-liquid separation and comprises a rotational flow sand filter body, the rotational flow sand filter body comprises a liquid inlet end and a liquid outlet end, and one end, far away from the rotational flow sand filter body, of the liquid outlet end is communicated with a drilling fluid buffer cylinder; the centrifugal deformation type filtering drum is additionally arranged on the basis of an existing rotational flow sand filter to capture tiny solids, the filtering effect of the sand filter is effectively improved, on the basis that the structure of the original sand filter is not damaged, operation is stable, maintenance is convenient, the centrifugal deformation type filtering drum is rapidly deformed and reset by controlling the rotating speed of the centrifugal deformation type filtering drum, and the service life of the sand filter is prolonged. In this way, tiny solids attached to the centrifugal deformation type filtering drum can be shaken off, so that self-cleaning of the centrifugal deformation type filtering drum is achieved, the trouble of manual regular disassembly and cleaning is omitted, the centrifugal deformation type filtering drum can keep an efficient filtering effect, and the filtering effect of the rotational flow sand filter can be effectively improved.

The utility model relates to the technical field of side slope monitoring, in particular to a retaining wall deformation monitoring device which comprises a plurality of fence units, each fence unit comprises a control rod and a terminal rod, the control rods and the terminal rods are fixedly arranged on a retaining wall through positioning units, and a tightened steel wire rope is arranged between each control rod and the corresponding terminal rod. The fence unit is electrically connected with a solar terminal part, the solar terminal part is arranged at the top of the retaining wall, a tension sub-controller unit is arranged in the solar terminal part, and the solar terminal part is connected with the cloud platform through a network; the system is simple in structure, convenient to install and capable of monitoring most of retaining walls in real time, each fence unit is responsible for monitoring a certain area of the retaining wall, when the tension strength change of the steel wire rope is larger than a set threshold value, an alarm can be given and alarm information can be sent to a cloud platform, the retaining wall is monitored by the multiple fence units, and the safety of the retaining wall is guaranteed. The position of the deformed retaining wall can be quickly positioned, and subsequent overhaul and maintenance of the retaining wall are facilitated.

The utility model discloses a breathable wear-resistant sofa fabric which comprises a base cloth layer, an elastic warm-keeping layer arranged outside the base cloth layer, a surface layer arranged outside the elastic warm-keeping layer, a wear-resistant layer coated outside the surface layer, a plurality of rows of wear-resistant strips uniformly and fixedly connected outside the wear-resistant layer, and breathable holes respectively arranged between adjacent wear-resistant strips on the wear-resistant layer. And the air holes are conical holes with small upper parts and large lower parts and penetrate through the wear-resistant layer and the surface layer. The wear-resistant layer can improve the wear resistance of the surface of the fabric, and the wear-resistant strips can reduce the contact area between a human body and the wear-resistant layer, so that the wear of the wear-resistant layer is further reduced, and the wear-resistant effect of the fabric is good; besides, the semi-cylindrical soft silica gel sheets can improve the deformation capacity of the wear-resisting strips, and when people make contact with the sofa fabric, the wear-resisting strips are squeezed by the human body and can rapidly deform, so that the comfort of the fabric is improved; the air holes can improve the air permeability of the wear-resistant layer and the surface layer, and the air holes are conical holes with small upper parts and large lower parts, so that the interiors are not easy to block.

The utility model discloses a cable waterproof joint that sealing ring connection is reliable, its technical scheme main points are including wiring main body, sealing cover, cap, sealing ring and nut, the wiring main body includes the convex ring, and the outer connection end and the accommodation end located respectively at the both sides of convex ring, the sealing ring cover is located the outer connection end, still include the tightening ring and multiple connecting strips that will the sealing ring be connected to the tightening ring of accommodation end outside and with the close -fitting of convex ring, multiple connecting strips all distribute around the axis of sealing ring and with the close -fitting of convex ring outer wall, solved the problem that sealing ring connection stability is poor and is easy to move or fall off of prior art.

The utility model discloses a lifting device of electric lifting furniture, which comprises a first tubular part, a second tubular part and a compensation element, a sliding surface is arranged on the outer side of the compensation element, a fixed bulge and a hot melting bulge are arranged on the inner side of the compensation element, a mounting hole is arranged on the second tubular part, and the sliding surface is arranged on the mounting hole. The fixing protrusion is inserted into the mounting hole so that the compensation element can be attached to the outer side face of the second tubular part in the axial direction of the second tubular part, and the hot melting protrusion is heated to generate plastic deformation to present the shape corresponding to the outer surface of the second tubular part. The gap between the first tubular part and the second tubular part is filled through the compensation element, compensation elements of different sizes do not need to be prepared, the assembly difficulty is greatly reduced, and the compensation element is attached to the outer side face of the second tubular part in the axial direction of the second tubular part, so that the assembly difficulty is greatly reduced. Therefore, the installation position of the compensation element is not affected by the shape of the second tubular part, and the application range is wider.

The invention provides a pipe penetrating assembly and a pipe penetrating device with the same. The pipe penetrating assembly comprises a main body structure, and a splicing structure used for being spliced with a main body structure of another pipe penetrating assembly is arranged on the main body structure; the pipe penetrating and wire passing structure defines a penetrating hole for a wire body to penetrate through, and the size of the penetrating hole can be adjusted so as to adapt to the wire bodies with different diameters; the connecting structure is connected with the main body structure and the pipe penetrating and wire passing structure, so that the pipe penetrating and wire passing structure is installed on the main body structure; at least part of the connecting structure is arranged in a deformable mode so as to deform along with the change of the size of the penetrating hole. The pipe penetrating assembly solves the problem that in the prior art, a pipeline layout mode in a numerical control machine tool is difficult to adapt to pipelines and lines with different diameter specifications.

The invention relates to the technical field of vegetable planting, in particular to soil loosening and weeding equipment for vegetable planting, which comprises a frame and further comprises mounting seats, a lifting assembly, a deformation assembly and a rake tooth weeding assembly, soil loosening teeth and rake teeth are mounted at the bottom ends of the two mounting seats respectively, and each mounting seat comprises a fixed seat and two movable seats. The two movable seats are hinged to the two ends of the fixed seat, synchronous lifting of the two mounting seats is achieved through the lifting assembly, and the deformation assembly is used for achieving synchronous upward or downward deflection of the two movable seats; the soil loosening and weeding structure can be deformed to be matched with the inclined planes of the ridging parts for a vegetable planting field with alternately distributed ditch parts and ridging parts, so that operation can be smoothly carried out on different terrains, the situation that effective operation cannot be carried out due to unmatched terrains is avoided, and the adaptability of equipment to complex terrains is greatly improved.

The present invention provides a reconfigurable flexible pressure sensor based on magnetic ion droplets and a preparation method thereof, wherein superparamagnetic nanoparticles are combined with ion droplets to prepare magnetic ion droplets with high fluidity and magnetic controllability, and the magnetic ion droplets are used as the pressure sensitive layer of the pressure sensor device to construct a flexible stretchable pressure sensor based on the magnetic ion droplet array. The present invention also provides a distributed / combined non-contact multi-element in-situ reversible reconstruction method of the flexible pressure sensor, which uses an external magnetic field to control the magnetic ion droplets in the sensor to perform programmable low-resistance rapid movement and deformation between the super-hydrophobic interconnected microfluidic channels and chamber arrays, so as to regulate the spatial distribution, composition / volume and geometric shape changes of the magnetic ion droplets in the array, and achieve the distributed / combined non-contact multi-element in-situ reversible reconstruction of the performance of the flexible stretchable pressure sensor in terms of spatial resolution, sensitivity, detection limit and pressure response mode through one or more combinations of changes.

The application relates to the technical field of wind turbine units, and particularly provides a blade deformation rapid evaluation method and system, an electronic device and a storage medium, and aims to solve the technical problems of a complex calculation process and a long time consumption of an existing method. To this end, the blade deformation rapid evaluation method comprises the following steps: acquiring a previously constructed aeroelastic model and a tip loss coefficient database; constructing a first mapping relationship based on the aeroelastic model and the tip loss coefficient database, wherein the first mapping relationship represents a linear response relationship between a blade deformation amount and aerodynamic force; constructing a second mapping relationship based on the aeroelastic model and the tip loss coefficient database, wherein the second mapping relationship represents a linear response relationship between the aerodynamic force and the blade deformation amount; and determining a blade deformation evaluation result based on the first mapping relationship and the second mapping relationship. The application can rapidly evaluate the deformation of a blade under different wind speed conditions, and effectively reduces the calculation amount.

The utility model relates to the technical field of copper foil production and processing, and provides a coil pressing device for copper foil production, which comprises a device body, the top of the device body is fixedly provided with an air cooler, the other end of a first air outlet pipeline is fixedly connected with a pipeline joint, and second air outlet pipelines are fixedly embedded in the centers of the two sides of the pipeline joint. When the copper foil pressing device is used, the gap between the first pressing roller and the second pressing roller can be adjusted through the air cooler, the screw and other structures, the deformation degree of copper foil in the pressing process can be controlled through the device, the flexibility of the device is improved, and the copper foil pressing device is convenient to use. And meanwhile, through the combination of the air cooler and the spray head, cold air can be quickly blown to the surface of the copper foil, the temperature of the copper foil is quickly reduced, the cooling speed is increased, and quick curing and stabilization of deformation of the copper foil are facilitated.

The embodiment of the utility model relates to the technical field of air bags, and particularly discloses an air bag, a pneumatic massage system and a seat, the air bag comprises an air bag body, a first adsorption part and a second adsorption part, the air bag body is used for filling air, the air bag body comprises a first inner surface and a second inner surface which are oppositely arranged along a main deformation direction, the first adsorption component is fixedly arranged on the first inner surface, the second adsorption component is fixedly arranged on the second inner surface, and when the air pressure in the air bag is smaller than a preset value, the first adsorption component and the second adsorption component attract each other to prevent the air bag body from deforming. And when the air pressure in the air bag body exceeds a preset value, the first adsorption part is separated from the second adsorption part, so that the air bag body is quickly deformed. By means of the mode, the explosion filling effect can be achieved, then the beating effect is achieved, and the massage effect is improved.

The invention discloses an air bag pipe pile and a using method, and relates to the field of civil engineering, the air bag pipe pile comprises a main pile body and a movable pile body, the main pile body is arranged to press a soil body, at the moment, the main pile body and the movable pile body are integrated, no protrusion exists, the whole is smoothly embedded into the soil body, and after the main pile body and the movable pile body are embedded in place, the air bag pipe pile is formed. Pressurizing is started, so that the outer air bag and the inner air bag expand to squeeze the soil tightly, and the side wall friction resistance is enhanced. The main pile body comprises an outer air bag arranged on the surface of the main pile body. A force is applied to the outside by inflating the outer bladder. The movable pile body is in sliding connection with the main pile body, the movable pile body is connected with the inner air bag, expansion of the inner air bag drives the movable pile body to move, the first air bag of the pile head is pressurized, and the first air bag is pressed into the soil body towards the side wall to form built-in fixation. The main pile body is embedded into a soil body, and after the main pile body reaches a designated position, pressurization is started, so that the outer air bag and the inner air bag are continuously expanded, pressure is applied to the outer side, and the side wall friction resistance is enhanced.

This application relates to a folding and sewing method, a folding device, and a bag-attaching machine. The folding and sewing method uses a folding device to sew a fabric bag and includes the following steps: a tongue-pressing plate is placed on the worktable; a tongue-pressing plate driver drives the tongue-pressing plate to extend outward and places the bag on the tongue-pressing plate; a bracket driver drives a mounting bracket to move towards the tongue-pressing plate; when the tongue-pressing plate contacts an elastic body, the mounting bracket stops moving; a magnet driver drives a magnetic suction component to move towards the tongue-pressing plate; when the magnetic suction component passes through a perforated hole and is magnetically attracted to the bag and the tongue-pressing plate, the magnet driver drives the tongue-pressing plate to press against the elastic body, causing the tongue-pressing plate to be recessed into the elastic body. The folding and sewing method, folding device, and bag-attaching machine provided by this application solve the problem of high manufacturing costs caused by the need to frequently change the concave mold when changing bag styles.

The utility model discloses a lifting device of electric lifting furniture, which comprises a first tubular part, a second tubular part and a compensating element, and the compensating element is arranged between the first tubular part and the second tubular part and used for compensating a gap between the first tubular part and the second tubular part. A fixing protrusion and a hot melting protrusion are arranged on the inner side of the compensation element, a mounting hole is formed in the second tubular component, the fixing protrusion is inserted into the mounting hole, the compensation element clamps the second tubular component, and the hot melting protrusion is heated to deform to be in the shape corresponding to the outer surface of the second tubular component. In the process that the compensation element is installed on the second tubular part, the second tubular part is clamped, stable installation of the compensation element on the second tubular part is kept, accurate filling of a gap between the first tubular part and the second tubular part by the compensation element is guaranteed through the hot melting protrusions, and the compensation element is prevented from being damaged. Multiple attempts for installation between the first tubular part and the second tubular part are not needed, and the assembly efficiency is improved.

According to the technology for manufacturing the thick-edge pot body through heating, a spinning wheel is used for machining a wafer base material, the spinning wheel comprises a connecting disc, an annular concave position, a first convex position step and a second convex position step, the annular concave position is located between the connecting disc and the first convex position step, and the second convex position step is connected to the first convex position step; the diameter of the outermost edge of the first convex step is larger than that of the outermost edge of the second convex step; the technology for manufacturing the thick-edge pot body through heating comprises the following steps of spinning preparation, heating treatment, edge thickening, thin-wall spinning, thick edge forming and thick edge shaping. According to the invention, the problem that a pot body with a thick edge cannot be processed from a wafer base material with relatively high strength is solved.

The application discloses a flexible actuator based on gas-liquid phase change and a haptic feedback interactive device, comprising: a phase change material layer for feeding back normal pressure in a haptic interactive process according to liquid-gas phase change and feeding back temperature in the haptic interactive process through Joule heat; a thermoelectric material silica gel layer for actively managing heat according to Peltier effect, cooling the phase change material layer and realizing dynamic and bidirectional adjustment of normal pressure and output temperature; a composite high-efficiency heat sink layer for bottom heat dissipation to guarantee thermal stability of the actuator in high-frequency cyclic operation; the phase change material layer, the thermoelectric material silica gel layer and the composite high-efficiency heat sink layer are alternately arranged from top to bottom to form an array type pump-free thermoelectric-phase change integrated actuator; through the electric-heat-phase change integrated coupling mechanism and the ingenious multifunctional array structure design, the application solves the contradiction between load and speed, realizes decoupling output and high-fidelity playback of the normal pressure and temperature multi-modal haptic signals.

The application discloses a high-stress surrounding rock tunnel construction method based on a pre-prevention and post-resistance supporting principle, and steps are as follows: determining a small-hole-diameter excavation radius r 0, excavating a tunnel, calculating a surrounding rock loose circle radius R s and determining a length of a prestressed anchor rod or anchor cable L , drilling an anchor hole on a small-hole-diameter excavation profile, placing the prestressed anchor rod or anchor cable in the anchor hole and installing the prestressed anchor rod or anchor cable into a surrounding rock loose circle and original rock behind a design excavation profile, continuing to excavate the tunnel to the design excavation profile line, fixing the prestressed anchor rod or anchor cable on the design excavation profile by using an anchor device, and reinforcing the surrounding rock again by using a supporting measure. The prestressed anchor rod or anchor cable is advanced and anchored in the surrounding rock loose circle and original rock behind the design excavation profile, a radial prestress is provided, and a pressure arch is formed, so that the surrounding rock in a range from the design profile to the surrounding rock loose circle is in a three-dimensional stress state, the prevention capacity of the advanced support is fully exerted, and the strength of the surrounding rock caused by excavation unloading is prevented from being instantaneously weakened.

The utility model relates to the technical field of earphones, in particular to a self-adaptive springback earphone and an earphone module. The self-adaptive springback earphone comprises an earphone body, an air bag and an adjusting assembly, the air bag is connected with the earphone body, the side, away from the earphone body, of the air bag is used for being attached to the ear contour, an air bag cavity is formed in the side, close to the earphone body, of the air bag, and the adjusting assembly comprises a main exhaust groove which is formed in the side, close to the earphone body, of the air bag. The first end of the main exhaust groove is located in the air bag cavity, and the second end of the main exhaust groove communicates with the outside so that the air bag cavity can communicate with the outside. By applying the technical scheme of the invention, the air bag can realize rapid self-adaptive rebound, so that the air bag can be stably attached to the ear contour in various use scenes, and the wearing comfort and stability of the earphone are further improved.

The invention relates to the technical field of shoes and garments, in particular to a symmetric lattice 3D printing running shoe with high buffering performance, which comprises a lattice midsole formed by 3D printing and a vamp body formed by 3D printing, and the upper surface of the vamp body is provided with a vamp opening for a foot to extend into. The lattice insole comprises an insole body composed of a plurality of lattice bodies formed through 3D printing and a supporting plate arranged on the top face of the insole body, the supporting plate comprises an arc-plate-shaped heel plate and a middle section plate, one side of the middle section plate and one side of the heel plate are integrally formed, and a half sole plate is integrally formed on the other side of the middle section plate. A stress groove penetrating through the heel plate is formed in the position, located at the stress position of the lower surface of a foot heel, of the heel plate, a plurality of buffering supporting blocks are embedded in the half sole plate in a penetrating mode, and the lattice body comprises a honeycomb-shaped frame formed through 3D printing and a deformation cavity integrally formed in the frame. And four supporting cylinders with uniformly distributed gaps are formed on the inner wall of the deformation cavity through 3D printing.

The invention provides a tunnel support deformation safety analysis method which is suitable for the field of tunnel construction. The method comprises the steps of arranging monitoring points, obtaining vault monitoring point image data, performing comparison image data processing, performing edge point coordinate set processing, estimating vault deformation, estimating left and right side wall deformation and performing safety evaluation. The monitoring points are shot every certain time, the shot monitoring points are compared with the first comparison image data, the relative displacement of the center of the deformation indication board in the front image and the rear image is calculated through an algorithm, and the relative displacement is the approximate value of the deformation amount of the monitoring points. The method has the characteristics of high monitoring efficiency, high accuracy and timely deformation result response, and can be widely applied to the field of tunnel construction deformation monitoring.

The present invention relates to the technical field of footwear and clothing, and in particular to a symmetrical lattice 3D printed running shoe with high buffering performance, comprising a lattice midsole formed by 3D printing and a shoe upper body formed by 3D printing, wherein the upper surface of the shoe upper body is provided with a shoe upper opening for inserting a foot, the lattice midsole comprises a midsole body composed of a plurality of 3D printed lattice bodies and a support plate arranged on the top surface of the midsole body, the support plate comprises an arc-shaped heel plate and a middle section plate integrally formed with one side of the heel plate on one side, a forefoot plate integrally formed on the other side of the middle section plate, the heel plate is provided with a stress groove penetrating the heel plate at a stress position on the lower surface of the heel of the foot, a plurality of buffering support blocks are penetrated and embedded on the forefoot plate, the lattice body comprises a honeycomb-shaped side frame formed by 3D printing and a deformation cavity integrally formed in the side frame, and the inner wall of the deformation cavity is 3D printed with four support cylinders with evenly distributed gaps.

The invention discloses a metal material intelligent continuous production device with a local structure regulation and control function and a production method thereof, and the metal material intelligent continuous production device comprises a computer control system, a current output system, a smelting and casting system and an electric heating system, according to the method, through cooperative work of the defect online detection system and the current micro-area structure regulation and control system, detection and immediate regulation and control of plate and strip structures are achieved. According to the method, on the premise that the whole production process is not affected, online monitoring and dynamic regulation and control can be carried out on the metal material, quality control of products in all links is ensured, and the reworking rate and the rejection rate caused by defects are greatly reduced. Meanwhile, the method is suitable for metal materials of different types and specifications, customized regulation and control can be carried out according to specific requirements, and diversified industrial production requirements are met.

The invention discloses a connector technology, and aims to provide a four-core beam-expanding oil-filled optical fiber connector and an assembling method thereof. According to the technical scheme, the oil-filled plug is characterized by comprising a threaded sleeve, a plug shell, a four-optical-fiber beam expanding insulator, a pressure compensator, an oil-filled plug tail clamp, a sealing assembly and a calibration gasket which is clamped between the butt joint end faces of the oil-filled plug tail clamp and the plug shell and used for adjusting the pre-compression stroke of the pressure compensator. The screw sleeve, the plug shell, the four-optical-fiber beam expanding insulator, the pressure compensator, the oil-filled plug tail clamp, the sealing assembly and the calibration gasket jointly define a completely-closed oil-filled cavity, fluorinated oil or synthetic hydrocarbon oil subjected to degassing treatment is injected into the oil-filled cavity through a valve, and the oil-filled cavity is matched with the pressure compensator to construct an active pressure compensation sealing system. The invention is suitable for the technical field of connectors.

The application discloses a resistance detection device, a resistance detection system, an electric table and an electric hanging cabinet, belongs to the field of resistance detection, has high resistance detection sensitivity, and discloses the resistance detection device, which comprises a first shell and a second shell, the second shell is floatingly installed on the first shell through a first elastic element, a circuit board is arranged on the first shell, a resistance detection switch connected with the circuit board and a rotating knob are arranged on the first shell, one end of the rotating knob is a free end abutting against the first shell, the other end of the rotating knob is a pressing end for pressing the resistance detection switch, and the free end is driven to drive the pressing end to move away from the resistance detection switch to generate a resistance signal.

The application relates to the field of forming piece correction technology, in particular to a correction jig for injection molded pieces, which comprises a first mold base provided with a first correction groove; a second mold base oppositely arranged with the first mold base, the second mold base being provided with a second correction groove, the first correction groove and the second correction groove being matched to form a closed correction space, the correction space being matched with the drawing size of the injection molded piece; and a connecting structure for fixedly connecting the first mold base and an external driving device respectively, and driving the first mold base to move towards or away from the second mold base under the driving of the driving device. The inner wall of the correction groove is designed as a continuous curved surface which is opposite to the curvature trend of the deformation part of the injection molded piece, and the bending deformation caused by cooling shrinkage is offset through mechanical compensation; the organic combination of the correction mold and the cooling mold group realizes efficient correction, rapid cooling and low-cost production of the deformation of the injection molded piece, and comprehensively improves the product yield and assembly precision.

The utility model relates to the technical field of medical instrument packaging, in particular to an easy-to-tear sealing structure for medical instrument packaging, which comprises a sealing film and a packaging cavity, and the sealing film comprises a sealing part for sealing an opening of the packaging cavity and an easy-to-tear part; the sealing part is partially connected with an opening of the packaging cavity, and the easy-to-tear part is arranged on the side, close to the packaging cavity, of the sealing part and connected with the opening of the packaging cavity. The two bonding edges are connected with the edge of an opening of the packaging cavity and arranged oppositely, the two easy-to-tear edges are connected with the sealing part in a tearable mode and arranged oppositely, an easy-to-tear area penetrating through the two bonding edges is arranged on the inner sides of the two easy-to-tear edges, and two parallel easy-to-tear lines are arranged on the portions, close to the inner sides of the two easy-to-tear edges, of the easy-to-tear area respectively. The sealing portion includes a first non-adhesive region and a second non-adhesive region. Through the arrangement of the sealing part and the easy-to-tear part, the sealing film can be easily and conveniently uncovered, and the problem that due to the fact that a tearing opening of the sealing film is too large, contents in a packaging cavity fall off can be solved.