38results about How to "Play shockproof" patented technology

The invention discloses a high-thermal-conductivity organosilicone mud. The high-thermal-conductivity organosilicone mud is prepared from the following raw materials: 100 parts of silicone oil and 1000-1200 parts of heat-conducting powder filler in parts by weight, 0.5-1wt% of plasticizer and 1-3wt% of powder surface treating agent in terms of the heat-conducting powder filler, and 1-3wt% of cross-linking agent, 5-10wt% of high temperature resistant pigment and 0.01-0.015wt% of platinum catalyst in terms of the silicone oil. Besides, the invention also discloses a preparation method of the high-thermal-conductivity organosilicone mud. The high-thermal-conductivity organosilicone mud product has the advantages of high thermal conductivity, stable heat transfer property, excellent high temperature resistance, plasticity just as plasticine and the like; the preparation method of the high-thermal-conductivity organosilicone mud is simple; a better thermal-conductivity solution way can be provided for electronic heating components and radiating or other cooling devices.

The invention discloses an air-cooled module for heat transfer temperature uniformization of a fuel cell. The air-cooled module mainly consists of a fuel cell module, fins and a fan system; the fuel cell module comprises an end cap, a membrane electrode, an ultra-thin temperature uniformization plate, a plurality of membrane electrodes and a plurality of ultra-thin uniform temperature plates are alternately arranged, the two sides of each membrane electrode are respectively provided with an ultra-thin uniform temperature plate, and the ultra-thin uniform temperature plate comprises a shell, acavity, a liquid suction core and a working medium; The hollow cavity is arranged in the housing, the hollow cavity is at least protruded from one end of the housing, and the hollow cavity is providedwith a liquid suction core and a working medium; The upper surface or the lower surface of the shell is respectively provided with an air flow channel or a hydrogen flow channel; The overall thickness of the ultra-thin homogeneous temperature plate shall not exceed 3mm; A plurality of fins are installed on the condensing end of the ultra-thin uniform temperature plate. The evaporation end of theultra-thin uniform temperature plate of the invention can separate the reaction gas, collect and conduct the electric current; The heat flux concentrated on the surface of the bipolar plate is rapidlytransferred and diffused to the large area of the condensation surface, which has the effect of uniform temperature and heat dissipation.

The invention provides a closed-loop Hall current sensor, belongs to the technical field of sensors, and solves problems that existing sensors are poor in anti-interference capacity. The closed-loop Hall current sensor comprises an insulating shell. The insulating shell is internally hollowed so that an accommodating cavity is formed. An annular magnetic core is transversely arranged in the accommodating cavity. The external surface of the annular magnetic core is provided with coils. The annular magnetic core is provided with a notch penetrating through the annular magnetic core. A Hall element is installed in the notch. An annular installing part penetrating through the insulating shell is arranged in the middle part of the annular magnetic core. The insulating shell is also internally provided with a circuit board. One end of the circuit board is respectively connected with the Hall element and the coils, and the other end of the circuit board extends so that a pin headers is formed. The pin head downwardly stretches out of the insulating shell The annular installing part is made of polyformaldehyde composite material. The closed-loop Hall current sensor has advantages of being high in sensitivity, high in anti-interference capability and convenient to install.

Provided in the invention is an open-loop hall current sensor. With the sensor, a problem of weak anti-interference capability of the existing sensor is solved. The open-loop hall current sensor comprises an insulating housing; a mounting part is arranged at the end surface of the insulating housing; and a positioning part is arranged at the side wall of the insulating housing. The middle part of the insulating housing is hollowed to form an accommodation cavity; and an annular mounting part for installing a lead is arranged in the accommodation cavity. An annular magnetic core is arranged between the annular mounting part and the insulating housing; a notch penetrating the annular magnetic core is formed in the annular magnetic core; and the annular magnetic core and the annular mounting part are arranged coaxially. A hall element and a circuit board connected with the hall element are installed in the notch. A connecting hole is formed in the insulating housing; a connecting wire connected with the circuit board is arranged in the connecting hole; and a connecting sleeve is arranged between the connecting wire and the connecting hole. The annular mounting part is made of a polyformaldehyde composite material. The open-loop hall current sensor has advantages of high anti-interference capability and convenient installation.

The invention discloses a method and structure of deformable connection between a concrete trestle step and a floor. The concrete trestle step is constructed to be of a layered structure, an embedded iron casting is installed on a beam of a floor slab, a deformation joint with a certain size is reserved between the trestle step and the floor slab, an iron sheet is installed on the upper end face of the concrete trestle step structure and the upper end face of the floor slab in a complete covering mode, the portion, in the deformation joint, of the iron sheet is of a U-shaped structure, the U-shaped iron sheet extends in the deformation joint, the U-shaped iron sheet is filled with bitumastic oakum, a bitumastic wood-wool plate is laid on the bitumastic oakum, a cement mortar bedding cushion is laid on the iron sheet, a section steel plate covers the cement mortar bedding cushion, the end portion, close to the floor, of the section steel plate is fixedly welded to the embedded iron casting, a transverse gap is reserved between the section steel plate and the floor, and the gap is plugged through polyurethane sealing materials after being welded. According to the method and structure of deformable connection between the concrete trestle step and the floor, the requirement of large-scale projects for the deformation joint can be met, the effect of sedimentation, the effect of shock prevention and the effect of stretching and contraction are achieved, and performance of water resistance is improved.

The invention provides a laptop grip, which comprises a grip main body and a rotation shaft mechanism Fixed on a laptop body, wherein the grip main body is an elastic member which can be elastically deformed; two ends of the grip main body are provided with a connecting component; and the connecting component is movably connected with the rotation shaft mechanism and the connecting component and the rotation shaft mechanism are relatively moved, wherein the grip main body takes the elastic member as a frame, and a handle covers outside the grip main body. The grip main body takes the elastic member or the elastic member as the frame, so that a handle part of the grip has certain elasticity and is elastically deformed when the handle part is subjected to an external force so as not to cause the damage of the grip such as breaking and the like; and the handle part can bear an external impact force together with a covering member at the periphery of the laptop so as to play a role in buffering the connected laptop. The movable connecting component is arranged between the grip body and the rotation shaft mechanism, and can make the grip drawn out when the grip is lifted, and make the grip automatically returned to a reset state when the grip is loosened so as to save a placement space.

The invention discloses a locking device for a laser alignment instrument. The locking device comprises a base, a support, a first locking sheet, a second locking sheet and a driving device. A center hole is formed in the base, and an activity range of a center swing rod of the laser alignment instrument is defined by the center hole; the support is upwardly arranged from the base around the center swing rod, the first locking sheet and the second locking sheet are oppositely arranged around the center swing rod, and each locking sheet comprises a first end shaft, a second end shaft and a clamping portion, and each first end shaft and the corresponding second end shaft are coaxial with each other and are respectively pivotally connected with the support; the clamping portions are used for clamping the center swing rod; the driving device is used for driving the first locking sheet and the second locking sheet; when the driving device is switched on, the clamping portion of the first locking sheet and the clamping portion of the second locking sheet respectively rotate towards the center swing rod until the clamping portions reach locking positions, so that the center swing rod can be locked; when the driving device is switched off, the clamping portion of the first locking sheet and the clamping portion of the second locking sheet respectively rotate from the locking positions and reach releasing positions, so that the center swing rod can be released.

The invention, which belongs to the technical field of the machinery, provides a hall current sensor. With hall current sensor, a problem of weak anti-interference capability of the existing hall current sensor can be solved. The hall current sensor comprises an insulated housing; the middle part of the insulated housing is hollowed out to form an accommodation cavity; and an annular mounting part for installing a lead is arranged in the accommodation cavity. An annular magnetic core is arranged between the annular mounting part and the insulated housing; the annular mounting part and the annular magnetic core are arranged coaxially. A notch penetrating the annular magnetic core is formed in the annular magnetic core; a hall element and a circuit board connected with the hall element are installed in the notch. Besides, a connector connected with the circuit board is arranged at the outer surface of the insulated housing; and the connector contains a connecting part and a row-pin unit with four pins, wherein the connecting part and the row-pin unit are arranged in parallel. The annular mounting part is made of a paraform composite material. The hall current sensor is provided with high anti-interference capability and convenient installation.

The invention discloses a deformable connection method and a connection structure of concrete landing stage building surfaces. Deformation joints with certain widths are arranged between two landing stage building surfaces; a full iron sheet is used for sealing the lower end surface of the connection position of the landing stage building surfaces; the length of the iron sheet connected to the lower end surface between the deformation joints is larger than the actual lengths of the deformation joints, that is, the iron sheet connected to the lower end surface has certain surpluses; a waterproof coiled material is added on the iron sheet, so that a secondary waterproof function is realized; a cement mortar bedding cushion is laid on the waterproof coiled material; and the deformation joints on the waterproof coiled material are sealed with an asphalt mastic material. The deformable connection method and the connection structure can meet requirements for deformation joints in a large-scale project, has the functions of sedimentation, shock-proofing and expansion at the same time, and improves the drainage performance.

The invention discloses a deformable connection structure of concrete landing stage building surfaces. Deformation joints with certain widths are arranged between two landing stage building surfaces; a full iron sheet is used for sealing the lower end surface of the connection position of the landing stage building surfaces; the length of the iron sheet connected to the lower end surface between the deformation joints is larger than the actual lengths of the deformation joints, that is, the iron sheet connected to the lower end surface has certain surpluses; the deformation joints are filled with bituminous hemp fibers; the iron sheet is laid on upper end surfaces, which are flush with each other, of the two landing stage building surfaces at the upper parts of the deformation joints; the length of the iron sheet connected to the upper end surface between the deformation joints is larger than the actual lengths of the deformation joints, that is, the iron sheet connected to the upper end surface has certain surpluses; a layer of a waterproof coiled material is added on the iron sheet, so that a secondary waterproof function is realized; a cement mortar bedding cushion is laid on the waterproof coiled material; and the deformation joints on the waterproof coiled material are sealed with an asphalt mastic material. The deformable connection structure can meet requirements for deformation joints in a large-scale project, has the functions of sedimentation, shock-proofing and expansion at the same time, and improves the drainage performance.

The invention provides a steel structure concrete plate. The steel structure concrete plate includes a first side plate, a second side plate and a concrete precast base plate, wherein the concrete precast base plate is arranged at the bottom ends of the first side plate and the second side plate. The two sides of the concrete precast base plate are connected with the first side plate and the second side plate separately in a welded mode. The concrete precast base plate is fixedly provided with a plurality of triangle supporting frames. Each triangle supporting frame is fixedly provided with aU-shaped steel plate in a welded mode. A steel belt is arranged between every two adjacent triangle supporting frames. The two ends of each steel belt are connected with the first side plate and the second side plate separately in a welded mode and a concrete layer is poured between the first side plate and the second side plate. The steel structure concrete plate is simple in structure, and convenient to construct; through arrangement of convex reinforcing screw for connection, connection is more stable and fracture initiation is prevented; through arrangement of asbestosed wire gauze in theconcrete, the effects such as quakeproof, sound insulation, thermal insulation and heat preservation can be achieved.

The invention discloses a deformable connection structure of a concrete roof and a metal plate roof. A certain gap is reserved between the concrete roof and the metal plate roof, and an iron sheet (8) is mounted at the lower end of a connection position of a beam (1) of the concrete roof and a keel (7) of the metal plate roof; a heat insulation material (3) and a metal sandwich plate (5) are laid on a concrete plate and the roof keel (7), wherein a joint is reserved between the heat insulation material (3) and the metal sandwich plate (5) and filled with a certain filling material (9); a steel plate (4) is taken as a flashing material, stretches across the beam (1) of the concrete roof and the keel (7) of the metal plate roof, and is located above the heat insulation material (3) and the metal sandwich plate (5); and two ends of the steel plate (4) are sealed respectively with a sealing material, so that water is prevented from entering. The deformable connection structure can meet requirements for deformation joints in a large-scale project, has the functions of sedimentation, shock-proofing and expansion at the same time, and improves the drainage performance.

The invention discloses a communication talkback waterproof device, comprising an intercom body, an intercom connecting groove, a waterproof outer cover, an intercom slot, connecting flanges, a plurality of buoyancy adjusting assemblies, a portable clamp, a balancing base, portable elastic cords, a draw hook and a pull ring; the intercom connecting groove is arranged on the intercom body, the intercom slot is located inside the waterproof outer cover, and the intercom body is inserted in the waterproof outer cover; the plurality of buoyancy adjusting assemblies are arranged on two sides of the waterproof outer cover, and each buoyancy adjusting assembly includes a transverse rotating shaft, a first inflatable column, a lateral rotating shaft and a second inflatable column; the portable clamp is arranged on the waterproof outer cover, the balancing base is arranged at the bottom of the waterproof outer cover, the portable elastic cords are connected with the portable clamp and the draw hook, and the pull ring and the draw hook are movably fastened. The communication talkback waterproof device provided by the invention can enable the intercom body to float in a balanced manner when falling into water, thereby keeping components inside dry, ensuring normal use, and achieves waterproof, dustproof, shakeproof and other protective effects.

The invention discloses an LED headlamp capable of emitting lights from three surfaces. The LED headlamp comprises an LED lamp component, wherein the LED lamp component is composed of a lamp post and lamp beads; the shape of the end section of the lamp post is triangular; the lamp post with the end section to be triangular is composed of a first plane, a second plane and a third plane; and lamp beads are arranged on the first plane, the second plane and the third plane respectively. According to the LED headlamp, with adoption of the lamp post structure with the end section to be triangular, the LED headlamp can emit the lights from the three surfaces; compared with the structure of the LED headlamp of emitting the lights from two surfaces in the prior art, the structure of emitting lights from the three surfaces can make the lights more uniform and full, so that the effect of brightness of the LED headlamp is greatly improved; as positive pole lines and negative pole lines of the lamp beads on the first plane, the second plane and the third plane adopt a specific line connection mode, the lines on the first plane, the second plane and the third plane are mutually crossed to finally form positive and negative poles that a positive pole circuit and a negative pole circuit are electrically connected with a power connection, and thus the space of a product is saved, and the production cost is greatly lowered.

The invention discloses environment-friendly dust-free foam and a preparation method thereof. The method comprises the steps that waste foam is smashed into particles, wherein the particles are added into raw materials for manufacturing the foam, and granular polyurethane is added into the raw materials for manufacturing the foam; and then the foam manufacturing raw materials are uniformly stirred and mixed with the waste foam particles and the polyurethane so that the waste foam particles are uniformly fused with the raw materials. The preparation method comprises the following specific preparation steps: S1, preparing foam particles: crushing recycled waste foam into particles; s2, preparing a foam stock solution, namely mixing and stirring raw materials for preparing foam to form the stock solution; s3, preparing a foam foaming agent: uniformly mixing and stirring a foam stock solution and foam particles; s4, foam forming: pouring a foaming agent into the mold, and taking out a finished product after the foaming agent is formed. The foam product disclosed by the invention is halogen-free and accords with an ROHS2.0 environment-friendly material; high rebound resilience, high adhesive force and retention force are achieved, and the waterproof and anti-permeation functions are achieved; and good market application values are realized.

The invention relates to a transport cart, in particular to a safe transport cart for computer hard disks. The transport cart aims to provide the safe transport cart for the computer hard disks to perform the better shock-proof and dust-proof effects for the hard disks. In order to solve the above technical problems, the safe transport cart for the computer hard disks is provided. The transport cart comprises wheels, a base plate, placing frames, a first sliding rail, a first sliding block, a first fixing mechanism, a storage box, a first pull ring, a partition plate, a box cover, a second fixing mechanism and a top plate; the wheels are fixedly connected to the bottom of the base plate, the placing frames are placed on the top portion of the base plate, a plurality of placing frames are stacked vertically, and the top plate is fixedly connected with the placing frames of the top portion of the base plate. The transport cart transports and stores the computer hard disks to achieve protecting the integrity of the hard disks, and has the shock-proof and dust-proof effects.

The invention relates to an electrical device, in particular to an integrated electrical device having a shockproof function, which is applied to special military and police vehicles and solves the problems that the interior space utilization rate of electrical devices arranged on the existing special military and police vehicles is low and rational planning of the electrical devices and the cable layout is lacked. The device comprises a horn, an external starting socket, an insulation switch, a supporting frame I, a supporting frame II and a horn support, wherein the supporting frame I and the supporting frame II are plate bending parts and connected to form an installation supporting frame, an inclined plane which is fit with the angle of an installation plane of an engine compartment is formed at the bottom of the installation supporting frame, the insulation switch is installed on the upper plane of the supporting frame I, the external starting socket is mounted on the installation supporting frame, and the horn is mounted on the installation supporting frame through the horn support. Based on structural features of vehicles, two supporting frames are combined to perform shockproof and striking resistant functions, the space is utilized fully, the cable lengths of the insulation switch and the external starting socket are reduced, and the usability of the vehicles is improved.

A deformable connection method and deformable connection structure between concrete trestle steps and floor, wherein the trestle steps are constructed in a layered structure, and embedded iron pieces are arranged on the beams of the floor; a certain distance is left between the trestle steps and the floor. Deformation joint; the iron sheet is installed on the upper end face of the concrete step structure and the floor slab; the iron sheet forms a U-shaped structure in the deformation joint, and the U-shaped iron sheet extends in the deformation joint; the U-shaped iron sheet is filled with asphalt hemp; Asphalt wood fiber board is laid on the wire; cement mortar cushion is laid on the iron sheet; the profiled steel plate is covered on the cement mortar cushion; Leave a lateral gap; this gap is closed with a polyurethane sealing material after welding. The invention can meet the demand for deformation joints in large-scale projects, and at the same time plays the functions of settlement, shock resistance, expansion and contraction, and improves waterproof performance.

The invention discloses man-machine auxiliary communication equipment for English translation, which comprises a translation machine, and a protection assembly is arranged on the outer side of the translation machine. According to the man-machine auxiliary communication equipment for English translation, the shell and the bottom cover are arranged, a clamping plate abuts against a translation machine under the action of a spring, the translation machine can be protected, the shockproof and buffering effects on the translation machine can be achieved, the service life of the translation machine is prolonged, the use stability and safety of the translation machine are guaranteed, and meanwhile the translation machine is convenient to use. Through the arrangement of a rubber block and a through groove, the shell can be protected when the shell falls off, the protection effect and continuity are further improved, a locking effect is achieved when the shell and the bottom cover are connected, accidental separation of the shell and the bottom cover is avoided, the protection effect is further guaranteed, a hand can be inserted into an elastic band and the shell, and the hand is bound; therefore, the device is prevented from falling off from the hand, the use safety is further improved, and people can use the device conveniently.

The invention discloses a graphene type radiation protective coating. The coating comprises conductive packing, wave-absorbing packing and graphene. The radiation protective coating disclosed by the invention can serve as a radiation protective coating of various types of electronic equipment, the radiation protective coating, inner primer, putty and finish coating of a building wall body, and the like, so as to achieve the effects of electromagnetic shielding and electromagnetic compatibility; the coating is in a liquid state before curing and has fluidity; the viscosities of the coating are different according to the difference of materials, properties and production processes of the products; after the coating is cured completely, a layer of continuous material with a certain thickness is formed; after the coating is cured, the effects of electromagnetic shielding, resisting interference, and electromagnetic isolating can be achieved; in addition, the radiation protective coating disclosed by the invention has the effects of preventing water, preventing moisture, resisting oxidation, preventing corrosion, preventing earthquake and the like, and is an excellent radiation protective coating with reliable performance for buildings and electronic products.

The invention discloses a deformable connection method and a connection structure of concrete landing stage building surfaces. Deformation joints with certain widths are arranged between two landing stage building surfaces; a full iron sheet is used for sealing the lower end surface of the connection position of the landing stage building surfaces; the length of the iron sheet connected to the lower end surface between the deformation joints is larger than the actual lengths of the deformation joints, that is, the iron sheet connected to the lower end surface has certain surpluses; a waterproof coiled material is added on the iron sheet, so that a secondary waterproof function is realized; a cement mortar bedding cushion is laid on the waterproof coiled material; and the deformation joints on the waterproof coiled material are sealed with an asphalt mastic material. The deformable connection method and the connection structure can meet requirements for deformation joints in a large-scale project, has the functions of sedimentation, shock-proofing and expansion at the same time, and improves the drainage performance.

The invention discloses a multi-functional LED headlamp which comprises an LED lamp assembly, and further comprises a daytime running light, a photosensitive diode, a steering lamp or a camera, wherein the LED lamp assembly comprises a lamp pole, a lamp panel, lamp beads and a mounting ring; the lamp panel is arranged on the lamp pole; the lamp beads are arranged on the lamp panel; the mounting ring is arranged at the other end of the lamp pole; and the daytime running light, the steering lamp, the photosensitive diode or the camera is arranged on the mounting ring. According to the multi-functional LED headlamp, the daytime running light, the steering lamp, the photosensitive diode or the camera can be selectively arranged on the mounting ring, the functions of the daytime running light, the steering lamp, the photosensitive diode or the camera can be achieved, and a multi function selective utilization effect is achieved; a light gathering cover is arranged on the lamp pole, so that a relatively good light gathering effect is achieved; heat radiating grooves are formed in a top cover, radiating fins are arranged on the outer side of an aluminum body, and a fan is arranged, so that an optimal three-direction heat dissipation effect is achieved under the precondition that the volume of a product is not increased; and the lamp beads adopt 15W Philips lamp beads, so that the multi-functional LED headlamp has relatively high lighting brightness.

The invention discloses a locking device for a laser alignment instrument. The locking device comprises a base, a support, a first locking sheet, a second locking sheet and a driving device. A center hole is formed in the base, and an activity range of a center swing rod of the laser alignment instrument is defined by the center hole; the support is upwardly arranged from the base around the center swing rod, the first locking sheet and the second locking sheet are oppositely arranged around the center swing rod, and each locking sheet comprises a first end shaft, a second end shaft and a clamping portion, and each first end shaft and the corresponding second end shaft are coaxial with each other and are respectively pivotally connected with the support; the clamping portions are used for clamping the center swing rod; the driving device is used for driving the first locking sheet and the second locking sheet; when the driving device is switched on, the clamping portion of the first locking sheet and the clamping portion of the second locking sheet respectively rotate towards the center swing rod until the clamping portions reach locking positions, so that the center swing rod can be locked; when the driving device is switched off, the clamping portion of the first locking sheet and the clamping portion of the second locking sheet respectively rotate from the locking positions and reach releasing positions, so that the center swing rod can be released.

The invention discloses a high-thermal-conductivity organosilicone mud. The high-thermal-conductivity organosilicone mud is prepared from the following raw materials: 100 parts of silicone oil and 1000-1200 parts of heat-conducting powder filler in parts by weight, 0.5-1wt% of plasticizer and 1-3wt% of powder surface treating agent in terms of the heat-conducting powder filler, and 1-3wt% of cross-linking agent, 5-10wt% of high temperature resistant pigment and 0.01-0.015wt% of platinum catalyst in terms of the silicone oil. Besides, the invention also discloses a preparation method of the high-thermal-conductivity organosilicone mud. The high-thermal-conductivity organosilicone mud product has the advantages of high thermal conductivity, stable heat transfer property, excellent high temperature resistance, plasticity just as plasticine and the like; the preparation method of the high-thermal-conductivity organosilicone mud is simple; a better thermal-conductivity solution way can be provided for electronic heating components and radiating or other cooling devices.

The invention relates to a deformable connection method and a deformable connection structure of a concrete roof and a metal plate roof. A certain gap is reserved between the concrete roof and the metal plate roof, and sheet iron (1) is mounted at the lower end of a connection position of a beam (1) of the concrete roof and a roof keel (7) of the metal plate roof; a heat insulating material (3) and a metal core board (5) are laid on a concrete slab and the roof keel; a seam is reserved between the heat insulating material (3) and the metal core board (5); the seam is filled with a certain filler material (9); a steel plate (4) is taken as a flashing material and stretches across the beam (1) of the concrete roof and the roof keel (7) of the metal plate roof and located above the heat insulating material (3) and the metal core board (5); and two ends of the steel plate (4) are sealed by a sealing material, so that water is prevented. According to the deformable connection method and the deformable connection structure of the concrete roof and the metal plate roof, requirements for a deformation seam in a large-scale project can be met, sedimentation, shock proofing, stretching effects are realized at the same time, and the drainage performance is improved.

A deformable connection structure of concrete trestle floors, in which there is a deformation joint of a certain width between two trestle floors; the lower end surface of the junction of the trestle floors is sealed with a full length of iron sheet; the lower end surface is connected to the iron sheet at the deformation joint The length between them is greater than the actual length of the deformation joint, that is, there is a certain surplus of the iron sheet connected to the lower end surface; the deformation joint is filled with asphalt hemp; The length of the iron sheet connecting the end face between the deformation joints is greater than the actual length of the deformation joint, that is, the upper end face connecting iron sheet has a certain surplus; a waterproof membrane is attached to the iron sheet to play a secondary waterproof role; cement mortar pads are laid on the waterproof membrane layer, and the deformation joints on the waterproof membrane are blocked with asphalt mawangdi grease material. The invention can meet the demand for deformation joints in large-scale projects, and at the same time play the roles of settlement, shockproof, expansion and contraction, and improve waterproof performance.

The invention relates to an advertising lamp box device with a driving and winding variable-frequency function. The advertising lamp box device comprises an advertising panel, a lamp slice shield, a lamp slice, a highlight energy-saving lamp panel, an automatic winding device and an advertising bottom plate; the bottom surface of the advertising panel is connected with the upper surface of the highlight energy-saving lamp panel by bolts; the upper surface of the advertising bottom plate is connected with the lower surface of the highlight energy-saving lamp panel by bolts; the automatic winding device comprises an advertising winder and advertising driving equipment; the advertising winder is arranged at one end of the highlight energy-saving lamp panel in a length direction; the advertising driving equipment is arranged at the other end of the highlight energy-saving lamp panel in the length direction; a winding port is formed on the surface of the advertising winder; the winding portis buckled and connected with a clamping part; the clamping part is in gear meshed connection with an electric motor mounted inside the advertising winder; the surface of the advertising driving equipment is wound and connected with a connection belt; one end of the connection belt is clamped and connected inside the advertising driving equipment; and the other end of the connection belt is buckled and connected to the surface of the advertising driving equipment.

The invention discloses a protection device for a portable teaching tool box. The protection device comprises a portable teaching tool box, an acceleration sensor, a processor, a battery and a bubblebag puncture module, wherein the acceleration sensor and the bubble bag puncture module are both connected with the processor; the battery is used for providing electric power to the acceleration sensor, the bubble bag puncture module and the processor. By adopting the protection device for the portable teaching tool box, testing instruments and testing medicines carried inside the tool box can beprotected when the portable teaching tool box falls down by accident, testing instruments can be prevented from being damaged and / or testing medicines can be prevented from being leaked off, and danger can be avoided.