3039 results about "Screw cap" patented technology

The utility model discloses a diaphragm type energy accumulator, which relates to the energy accumulator field, and comprises a container main body, the top of the container main body is provided with an air inlet channel, the outer ring of the top of the air inlet channel is in threaded connection with a protection nut, the inside of the air inlet channel is in threaded connection with a mounting sleeve, and the inside of the mounting sleeve is in threaded connection with a threaded block. And a notch is formed in the threaded block, a short rod is movably installed in the notch, the lower end of the short rod is fixedly connected with a sealing block, a second thread is arranged on the outer ring of the short rod, the outer ring of the second thread is in threaded connection with a top plate, and the top plate is connected with the threaded block assembly through a spring. The mounting sleeve is separated from the air inlet channel by twisting the mounting sleeve, and the threaded block and the top plate are separated from the mounting sleeve and the short rod by twisting the threaded block and the top plate, so that the spring can be taken down for replacement, subsequent twisting mounting is relatively convenient, and meanwhile, air filling is more convenient due to the arrangement of the air inlet channel.

The invention discloses a tightening device for assembling an oil damper, and belongs to the technical field of damper assembling. The device comprises a workbench, a fixing mechanism is arranged on the top face of the workbench, a fixing frame is arranged on one side of the fixing mechanism, a moving assembly is arranged on the fixing frame, and a tightening mechanism is arranged on the moving assembly. The tightening mechanism comprises a mounting seat, the mounting seat is mounted on the moving assembly, a driving motor is arranged on the mounting seat, and a tool assembly is mounted on an output shaft of the driving motor; the adjustable tool assembly is arranged and can be suitable for assembling and using of screw caps of oil pressure dampers of different sizes, a fixing ring is driven to rotate through cooperation of a fixing block A and a protruding block, cooperation of a fixing block B and a mounting disc and arrangement of a threaded rod, and therefore a plurality of connecting rods do arc motion; and the distance between one ends of the inner sides of the connecting rods is adjusted, so that the screw caps of the oil damper with different sizes can be assembled and used, and the adjustment is convenient.

The utility model discloses a high-low voltage power distribution cabinet with a fireproof function, which relates to the technical field of power distribution cabinets and comprises a cabinet body, a fireproof mechanism is fixedly mounted at the top of the cabinet body, an alarm mechanism is fixedly mounted at the top in the cabinet body, a mounting seat is fixedly mounted at the lower end in the cabinet body, and a cabinet door is hinged to the front surface of the cabinet body. With the adoption of the structure, the device is provided with the fireproof mechanism, the fire extinguishing agent tank can be conveniently mounted, and the fire extinguishing agent tank is communicated with the conveying pipe frame after the fire extinguishing agent tank, the connecting hose and the valve are fixed through the hand-twisted screw rod; the fire extinguishing agent tank can be quickly disassembled by loosening the sealing screw cap, maintenance and replacement are convenient, the device adopts a physical fusing trigger structure, automatic fire extinguishing is achieved, extra detection is not needed, the stable fire extinguishing performance is achieved, operation is convenient, and the device is suitable for various fire fighting scenes.

The invention discloses a seat part riveting detection device and a use method thereof. The seat part riveting detection device comprises a rotating disc and a rotation driving mechanism, and a plurality of positioning tools used for placing adjusting parts are arranged on the rotating disc; a feeding and discharging station, a riveting station and a torque detection station are arranged in the circumferential direction of the rotary disc, the rotary disc is connected with a rotary driving mechanism, and the rotary driving mechanism drives the rotary disc to rotate and enables the positioning tools on the rotary disc to sequentially pass through the feeding and discharging station, the riveting station and the torque detection station. The riveting station is provided with riveting equipment used for riveting the seat part, and the torque detection station is provided with torque detection equipment used for detecting whether the torque of a screw cap on the adjusting part is qualified or not. A feeding and discharging mechanism is arranged on the feeding and discharging station. When the device is used, the whole machining and detecting process does not need manual participation, the automation degree is high, time and labor are saved, the labor cost is greatly reduced, and the production efficiency is improved.

The air inlet and return pipe comprises an air inlet and return pipe body and end nuts connected to the two ends of the air inlet and return pipe body, the air inlet and return pipe body is of a bilateral symmetry structure, and internal threads are arranged on the inner circumferential surfaces of the end nuts connected to the two ends; the air inlet and return pipe body is of a double-layer structure, the outer layer is a woven mesh made of stainless steel, and the inner layer is a fluoroplastic hose. End supports are respectively arranged at the joints of the two ends of the air inlet and return pipe main body and the end nuts, and are used for connecting the air inlet and return pipe main body and the end nuts; the length of the end portions of the two sides of the fluoroplastic hose is slightly larger than that of the woven mesh, and a turnup structure is formed at the end supporting position so that a sealing structure can be formed when the end nut is in threaded connection with other parts, the flexibility of the air inlet and return pipe of the pulse tube refrigerator is guaranteed, vibration can be greatly reduced, meanwhile, gas flow resistance is reduced, and working efficiency and refrigerating capacity are improved.

The invention discloses a screw cap structure with a face shell convenient to replace and a lacing device comprising the screw cap structure, the screw cap structure with the face shell convenient to replace comprises an inner screw cap and the face shell, the face shell is detachably installed on the outer side of the inner screw cap, a clamping block is arranged on the face shell, a separating and combining structure is arranged on the inner screw cap, and the clamping block is detachably installed on the outer side of the face shell. The clamping block is matched with the separation and combination structure to realize clamping and separation of the inner screw cap and the surface shell; the opening and closing structure comprises a first position and a second position, and when the clamping block and the opening and closing structure are connected in a matched mode at the first position, the face shell and the inner screw cap can be connected in a linkage mode. And the face shell can also rotate relative to the inner screw cap, so that the clamping block is rotated to a second position of the separating and combining structure, and the face shell and the inner screw cap are separated from each other at the second position, so that the disassembly between the face shell and the inner screw cap is more convenient, and the requirement of a user for quickly replacing the face shell is met.

The invention provides a mine inspection robot, and relates to the technical field of inspection robots, the mine inspection robot comprises a body and a mechanical arm mechanism, the mechanical arm mechanism is arranged at the top of the body, driving wheel sets are fixedly installed on the two opposite sides of the body, a snake-shaped mechanical arm is arranged at the output end of a connecting end shaft, and the main body of the mine inspection robot is composed of a plurality of arm body small sections; the side, away from the connecting end shaft, of each arm body small section is detachably provided with a connecting screw cap, the hinged position of each arm body small section is sleeved with a rubber protective sleeve, and the outer wall of each connecting screw cap is provided with an arc-shaped protruding structure used for supporting the strength of the corresponding connecting screw cap and protruding to expand the corresponding rubber protective sleeve. According to the invention, the joint is sealed and actively cleaned through segmented supporting and the rubber protective sleeve, so that the problems of joint failure, frequent maintenance and the like caused by movement clamping stagnation and dust invasion which are difficult to deal with by a conventional snake-shaped mechanical arm in a high-dust and multi-bending environment under a mine are effectively solved; and meanwhile, the problems that joints are blocked by accumulated dust and sealing is eroded in the high-dust environment under the mine are solved.

The invention discloses an unmanned underwater vehicle floating material fixing structure, and relates to the technical field of underwater vehicle buoyancy materials. In order to solve the problems that in the prior art, a buoyancy material of an underwater vehicle is generally fixedly connected with the vehicle through a bolt, a polycarbonate protective layer is sprayed outside a hollow glass bead floating material, the floating material is easily damaged by replacing the buoyancy material and disassembling the bolt in the later period, and the buoyancy material is relatively fragile and cannot be damaged. The floating material is abraded due to repeated disassembly, and the polycarbonate protective layer is easy to fall off after long time, and the like. The device comprises a floating material, a screw sleeve, a nut sleeve and a protective layer, the floating material is arranged in an aircraft cabin composed of a framework and a non-pressure-resistant shell, a bolt through hole is machined in the floating material, a screw sleeve and a nut sleeve are embedded in the bolt through hole, and the outer portion of the floating material is integrally wrapped with a protective layer. The method is used for mounting and fixing the floating material of the unmanned underwater vehicle.

The utility model discloses a 3D printing porous pedicle screw which comprises a screw body part and a screw cap part, the screw body part comprises a cortical bone thread area close to one end of the screw cap part and a cancellous bone thread area far away from one end of the screw cap part, and a porous structure area is arranged at one end, not connected with the screw cap part, of the screw body part. The porous structure area comprises an inner core column extending in the axial direction of the nail body part, at least one reinforcing beam and a porous structure, the reinforcing beams extend outwards from the periphery of the inner core column, and the porous structure is annularly distributed on the outer periphery of the inner core column. The porous structure can efficiently induce bone tissue to grow in, the screw and a vertebral body are connected into a whole, stress is effectively dispersed, the stability of the screw is improved, the porous structure is arranged on the vertebral body at the front end of the screw, screw breakage caused by stress concentration of the screw in a vertebral pedicle area can be avoided, meanwhile, the stability of the screw can be better improved through the reinforcing beam, and the service life of the screw is prolonged. The possibility of fracture of a porous area of the screw is reduced, generalization performance is better, and the use experience feeling is improved.

A resealable dispensing element for a composite package is shown and described including a main body with a flange and a hollow cylindrical spout with at least one outer thread, an opening means guided movably in the spout for opening the composite package and a resealable screw cap, having an anchor ring. The screw cap serves to drive the opening means when the composite package is opened for the first time and wherein the screw cap and the anchor ring are connected by a plurality of breakable material bridges or at least by a material anchorage for connection to the main body. The main body on the spout has at least one circumferential web for securely holding the anchor ring and wherein the anchor ring has on its inside a circumferential retaining web shaped such that it corresponds with the circumferential web, as well as a method for mounting the screw cap for such a dispensing element. In order to reliably rule out tilting of the anchor ring during the mounting process of the dispensing element, it is provided that the main body has a plurality of vertical guide ribs arranged distributed over the circumference on the spout between the outer thread and the circumferential web for uniformly stretching the anchor ring when the screw cap is applied during the mounting of the dispensing element.

The utility model discloses a solid-liquid separation bottle cap with a simple structure, which comprises a bottle cap seat, a jacking piece and a screw cap, the lower end of the bottle cap seat is provided with a connecting part for connecting a bottle body, the upper end of the bottle cap seat is provided with an external thread, the screw cap is provided with an internal thread, and the screw cap is in threaded connection with the upper end of the bottle cap seat through the matching of the external thread and the internal thread; an axial storage cylinder is arranged in the center of the bottle cap seat, a sealing piece is integrally formed at the lower end of the storage cylinder, and a tearing part is arranged between the sealing piece and the storage cylinder; according to the utility model, the extrusion inclined plane is adopted to push the ejection piece to move to realize opening, and threads do not need to be arranged between the ejection piece and the bottle cap seat, so that the structure of a product and the structure of a mold are simplified, and the production efficiency is improved; the sealing piece can be jacked open while the rotary cover is rotated to be opened, liquid can be poured out without taking out the jacking piece after the rotary cover is opened, and use is easy and convenient.

The utility model provides a spherical contact type movable joint, and belongs to the field of high-pressure pipe fitting manufacturing. The connecting device comprises a main body, a joint and a connecting nut, a thread is arranged at one end of the main body, and the joint is clamped in the coupling nut; the coupling nut is connected with the thread, so that the joint is connected with the main body; a spherical plug is arranged at one end, facing the main body, of the joint, and an arc-shaped groove is formed in the main body; a sealing gasket is arranged in the groove; and the spherical plug is in contact with the groove through the sealing gasket. According to the utility model, the joint and the main body are directly designed to be in spherical contact and are sealed by the sealing gasket, so that the sealing effect is good, and leakage caused by vibration can be effectively avoided.

The invention provides a full-automatic pretreatment system and method for a soil sample, and belongs to the field of soil sample treatment.The system comprises a weighing device, a digestion device, a transfer device and a constant volume device with a workbench, the constant volume device comprises a first mechanical arm used for grabbing and cap screwing, a second mechanical arm used for pipetting, an annular conveying unit provided with a plurality of pipe supports, a pipe clamping unit and a liquid level calibration unit, and the pipe supports are provided with containing grooves matched with digestion pipes and colorimetric pipes respectively. The first manipulator is set to grab and screw caps of the digestion tube and the colorimetric tube from a first position of the annular conveying unit, and the second manipulator is set to transfer liquid from a second position of the annular conveying unit. The full-process automatic operation from weighing to final volume fixing and subpackaging of the soil samples is achieved, the working efficiency of the system is remarkably improved, and especially the treatment efficiency of a large batch of soil samples is improved.

The utility model discloses a connecting piece, a filter element assembly and a filter, the connecting piece comprises a hollow support and an end disc connected with one end of the support, and the support is arranged on the periphery of a filter element in a surrounding mode and used for limiting the filter element in the radial direction; an oil return plug is eccentrically arranged on the outer end face of the end disc and used for sealing an oil return channel in the filter assembly. According to the technical scheme, when the filter element is assembled, an operator can firstly install the connecting piece with the oil return plug into the filter assembly, meanwhile, the oil return plug on the end disc also enters and seals the oil return channel in the assembly, then the filter element is installed in the screw cap or placed into the connecting piece, and finally the screw cap is screwed on the assembly. When the filter element is disassembled, after the screw cap is unscrewed, the screw cap takes out the filter element, and meanwhile, the filter element is taken out of the connecting piece. According to the scheme, the situation that the position of the oil return plug is adjusted in a rotating mode can be avoided, the filter element assembly can be installed without too much operation experience, product machining is easy, and the requirement for deviation is low.

The utility model discloses a leak-proof sleeve expansion joint, and relates to the technical field of expansion joints. The utility model includes an outer sleeve, on which a sleeve mechanism, a connecting mechanism and a compensating mechanism are arranged; the sleeve mechanism includes an outer sleeve assembly, an inner sleeve assembly and a limiting assembly, the outer sleeve assembly includes a first slider fixedly connected to the outer sleeve, the first slider is slidably connected to a sliding rod, the outer sleeve is provided with a first flange, the outer sleeve is fixedly connected to the first flange, the sliding rod is slidably connected to a fixed block, the fixed block is fixedly connected to the first flange, and the sliding rod is threadedly connected to a first nut. The utility model sets a sleeve mechanism, utilizes the telescopic sliding between the outer sleeve and the inner sleeve, and the force generated by the thermal expansion and contraction of the pipeline acts on the sliding of the outer sleeve and the inner sleeve, so that the force of pipeline deformation is dispersed, thereby further reducing the probability of deformation caused by the influence of thermal expansion and contraction on the displacement of the connecting pipeline.

The invention discloses a printed circuit board and electronic equipment, and relates to the technical field of printed circuit boards, the printed circuit board comprises a circuit board main body and an elastic part, a buffer groove is arranged at the outer side of a fixing hole of the circuit board main body, and the elastic part is installed, so that the elastic part is elastically abutted against a screw cap, and buffer vibration absorption and stress dispersion during screw fastening are realized; local stress concentration caused by rigid contact is avoided, and the problems that in the prior art, stress around a screw hole is concentrated in the screwing process of a screw, consequently, a server mainboard cracks or deforms, and the performance and the service life of electronic equipment are affected are solved. The technical effects of improving the mechanical stability of the circuit board, prolonging the service life and enhancing the equipment reliability are achieved.

According to the novel rope winding and unwinding device, in the state that a rope is tightened, the seat clamping jaw can move towards the shaft side teeth under the driving of the abutting driving part of the rotary cover, the elastic jaw arm keeps the matching of the jaw teeth and the shaft side teeth through elasticity, the winding shaft main body is driven to tighten and wind the rope, the shaft side teeth abut against the jaw teeth outwards in the process, and the rope is wound. The elastic claw arms of the seat clamping claws generate outward elastic deformation by means of elasticity, the shaft side teeth slide through the claw teeth along the corresponding tooth slopes on the claw teeth, and the claw teeth fluctuate in the direction close to or away from the shaft side teeth in the continuous rotating process. The claw teeth clamp the shaft side teeth by virtue of corresponding claw clamping surfaces on the claw teeth and position the winding shaft main body; when the rope object is released, the abutting driving part does not apply pressure to the seat clamping jaw, the jaw teeth are driven by deformation recovery of the elastic jaw arms to move outwards to be separated from the shaft side teeth, and the jaw teeth do not clamp the shaft side teeth. The shaft side teeth replace a traditional cover tooth structure. Relative rotation and clamping of the winding shaft and the cover body are achieved through the second axial limiting part and the third axial limiting part.

The invention discloses a cross layout type cap screwing structure which comprises two clamping arms capable of moving in two directions, the clamping arms are fixed to the two ends of a two-way telescopic assembly respectively, the two-way telescopic assembly is arranged at the bottom of a longitudinal sliding rail, a cap screwing head is arranged on a moving block of the longitudinal sliding rail, the longitudinal sliding rail is arranged on a moving block of a transverse sliding rail, and the transverse sliding rail is arranged on the moving block of the transverse sliding rail. And a cap conveying assembly is arranged at the end part of the transverse sliding rail. The bottle cap containing cavity is arranged to be in a liftable state, when the cap screwing head moves to grab the bottle cap, the bottle cap can be lifted by the containing cavity in advance, in this way, the cap screwing head does not need to move downwards to grab the bottle cap, and the time of the bottle cap grabbing stroke is saved.

The invention discloses an instantly-prepared beverage bottle cap, a beverage bottle and a filling method of the instantly-prepared beverage bottle cap, the bottle cap comprises a spiral upper cap and a spiral lower cap, a pull ring is connected between the spiral upper cap and the spiral lower cap, and a poking cone is movably arranged in the lower cap; the lower cap comprises a lower cap body in threaded connection with a beverage bottle opening and a containing cavity penetrating through the lower cap body and integrally connected with the lower cap body, and the bottom of the containing cavity is closed. The top of the containing cavity communicates with a connecting body, and a limiting ring is arranged at the communicating position of the connecting body and the containing cavity and on the inner wall of the connecting body. A lower shell integrally formed with the lower end of the connecting body is arranged on the outer side of the lower cover body; the poking cone comprises a cylindrical barrel and a conical puncturing structure, an annular flange is arranged on the upper portion of the cylindrical barrel and makes contact with the inner wall of the connecting body, an extrusion ring is arranged at the inner end of the top of the upper spiral cover and tightly attached to the annular flange, and the upper spiral cover rotates to drive the extrusion ring to extrude the annular flange to slide. And the poking cone is driven to slide in the connecting body to pierce the bottom of the accommodating cavity. The problem that the bottom of the dissolving cavity is not easy to poke is solved.

The utility model discloses a long pipe type storage cover and a packaging bottle. The storage cover comprises a rotary cover, a lower cover, a storage tube and a moving part, the lower cover, the storage tube and the moving part are transparent, the turned edge of the storage tube is configured to be pressed on the bottle opening of the bottle by the lower cover, a first elastic layer is arranged at the upper end part of the storage tube, and a part of the first elastic layer is located between the turned edge and the lower cover; the top end of the moving part can be connected with the screw cap, the moving part is in threaded connection with the lower cap so as to be driven by the screw cap to rotate and move downwards relative to the lower cap, and a second elastic layer is arranged on the outer surface of the neck of the moving part. The lower cap is provided with an inner skirt capable of extending into a bottle opening of the bottle, the inner skirt is located between the storage pipe and the moving part, the outer surface of the inner skirt makes contact with the first elastic layer, and the inner surface of the inner skirt makes contact with the second elastic layer. The part, extending into the bottle, of the storage cover is transparent, so that internal substance observation and quality supervision are facilitated, and attractiveness and sealing performance can be taken into consideration at the same time.

The utility model discloses a bone cement cannulated screw assembly which comprises a cannulated screw and an injector, the cannulated screw comprises a screw cap and a screw rod constructed to be of a hollow structure, the screw cap and the screw rod are integrally formed, an injection hole is formed in the screw cap, the injection hole is communicated with the hollow structure of the screw rod, threads are arranged on the screw rod, and a plurality of outflow holes are formed in the side face of the screw rod; the injector comprises a partition plate and an injection cylinder, the injection cylinder is detachably connected with the hollow nail, the hollow nail is screwed into the fracture position after the injection cylinder is connected with the hollow nail, an insertion groove is formed in the side wall of the injection cylinder, the partition plate slides in the insertion groove, and after the partition plate slides in the insertion groove in the first direction, the injection cylinder is partitioned to form a stirring groove. The bone cement stirring device has the function of rotating the hollow nail, can stir bone cement in the separated stirring grooves, can directly inject the bone cement into a fracture position, prolongs the solidification time of the bone cement, and improves the operation effect.

An interdental brush with a replaceable brush body with a core and a manufacturing method thereof are provided, and relate to the technical field of tooth cleaning tools. The interdental brush includes a handle, a screw cap, a fixing block and a brush body. One end of the handle is provided with an external thread, an interior of the screw cap is provided with an internal thread mating with the external thread of the one end of the handle. One end of the fixing block abuts against the handle, and an other end extends out of the screw cap. The brush body includes a core and bristles, the core is twisted by an amorphous alloy wire, one end of the core is clamped in the fixing block, and a periphery of an other end is connected to the bristles.

The utility model discloses a steel beam bolt with an anti-loosening function, which comprises a hexagon nut, the top of the hexagon nut is fixedly connected with a fixed wedge-shaped ring, the top of the fixed wedge-shaped ring is fixedly connected with a screw rod, a channel is arranged in the screw rod, a glue blasting bead is arranged in the channel, and the glue blasting bead is fixedly connected with the screw rod. A flow dividing hole is formed in one end of the screw rod, a wedge-shaped gasket is arranged outside the screw rod, the outer wall of the screw rod is in threaded connection with a fastening nut, and the outer wall of the screw rod is in threaded connection with an anti-disengaging nut. According to the steel beam bolt with the anti-loosening function, the channel is filled with the paraffin filler, the chemical characteristic that paraffin melts after being heated is adopted, the glue blasting bead enters the connecting gap of the screw along with melting of the paraffin, the coating of the glue blasting bead is heated to be dissolved, and therefore threads and the connecting gap are filled, and the anti-loosening function is achieved. And in combination with a paraffin solution, a tight filling layer is formed between the threads, so that strong adhesive force and vibration resistance are provided.

The invention discloses a hand screw which comprises a screw body and a hand screwing part, the screw body is composed of a screw rod and a nut, the nut is of a radial structure, and a notch is formed in the end of each emitting strip of the nut; and the hand screwing part is fixed on the screw main body and completely wraps the screw cap. According to the screw, the hand screwing part is fixed to the screw body and completely wraps the nut, the hand screwing part is integrally formed and completely wraps the nut, and therefore the hand screwing part cannot be separated from the screw body; the nut is of a radial structure, a notch is formed in the end of each emission strip of the nut, the multiple notches can improve the connecting performance of the nut and the hand screwing part, and the stability of the nut and the hand screwing part is better; the directions of the notches of the adjacent emission strips are opposite, and the notches in the opposite directions can ensure that the nut and the hand screwing part are well stressed no matter the hand screwing screw is rotated forwards and backwards.

The invention belongs to the technical field of petroleum and natural gas development, and particularly relates to a visual reservoir core relative permeability high-precision measuring device and method based on an unsteady state method. The device comprises a clamp holder, three glass tubes, a flow drum, a water metering pump, a gas-liquid separation tube, an annular pressure pump, a gas cylinder, an annular pressure sensor, a pressure regulating valve and an injection pressure sensor. The holder comprises a support, a barrel, a pull rod nut assembly, an adjusting screw rod, a restraint frame, an inlet plug, two pressing caps, a baffle ring, a sealing ring, a rock core cone, a transparent rubber sleeve and an outlet plug. The method comprises the following steps: 1, core pretreatment; 2, carrying out liquid measurement on the permeability; 3, displacement pressure is determined; 4, calculating the pore volume of the rock core; and 5, gas-driven water test and dynamic permeability calculation. The problems that reservoir rock core relative permeability measuring equipment is complex, inaccurate and difficult to use, and the stress state of the rock core is not comprehensively simulated are solved.

The utility model relates to the technical field of riveting, and discloses an FDS hot melting drill screw which comprises a screw body, a screw head and a screw cap, and the five-pointed star design of the screw cap can be more stably matched with a bit to smoothly drill the FDS hot melting drill screw into a plate. Meanwhile, when the screw is drilled into a plate, no waste material flies out, and breakage caused by inclination of the screw is avoided; the free end of the screw body is designed to be in a full triangular streamline shape, so that the free end of the screw is firstly drilled into a plate to play a pre-positioning role; due to the design of the annular groove below the screw head, in the screw drilling process, the plate is turned up in the direction opposite to the screw drilling direction and can be absorbed and covered by the groove space below the screw head.

The utility model belongs to the field of camera lenses, and particularly relates to a camera lens convenient to replace, which comprises a lens body, and a lens seat is mounted in an inner cavity of the lens body. According to the utility model, through the arrangement of the positioning mechanism, the lens body is firstly placed in the lens seat, after the lens body is installed, the positioning seat is pushed to move, the positioning seat drives the connecting plate to move, the connecting plate drives the elastic clamping block to move, and the surface of the elastic clamping block can be inserted into the inserting groove in the moving process of the elastic clamping block; the positioning seat can be stably fixed on the front side of the lens body and the lens body can be conveniently fixed in the lens seat, so that the problems that the lens is generally fixedly mounted through a threaded screw cap, and the screw cap is generally firmly connected with the lens in order to ensure the stability of the lens, so that the lens is difficult to fix are solved. Therefore, the problem that the replacement efficiency of the lens is reduced due to the fact that the lens is very inconvenient to disassemble is solved.

The color steel tile clamp comprises a left clamp body and a right clamp body, a movable groove is formed in the left clamp body, and a locking structure movably connected with the left clamp body is installed in the movable groove; an embedding groove matched with the locking structure is formed in the position, corresponding to the locking structure, of the right clamp body, the locking structure can be turned over to be arranged in the embedding groove to form relative locking of the left clamp body and the right clamp body, and the locking structure comprises a movable block rotationally arranged in the movable groove and a threaded column connected to one side face of the movable block; a fastening nut is assembled on the surface of the threaded column in a threaded mode. According to the color steel tile clamp, through the arranged locking structure, when the clamp is installed on a color steel tile in a buckled mode, the locking mechanism is directly turned over to be clamped into the embedding groove, fastening installation of the left clamp body and the right clamp body can be achieved by rotating the fastening nut, and the locking structure can be scattered in subsequent disassembly and installation; and the situation that parts fall off and are lost is avoided.

A captive screw closure with a tamper-evident band and a screw cap captively connected thereto is disclosed. The screw closure includes an outer surface with an internal thread and an upper surface. The mechanical strain on the retaining bands are substantially reduced. This is achieved by the screw closure having at least one pulling element which permits a pure axial longitudinal movement of the screw cap to the tamper-evident band in the direction of the longitudinal axis of the screw closure. The screw closure includes a pivoting element, in particular a pivoting plate, connected either fixedly or pivotably to the tamper-evident band. The pivoting element, in particular the pivoting plate, is detachably connected to the screw cap. The pivoting element, in particular the pivoting plate, may be connected to the screw cap in a fixed but pivotable manner.

According to the novel rope winding and unwinding device, when the rope is tightened, the seat clamping jaw can move towards the shaft side teeth under the driving of the abutting driving part of the rotary cover, the elastic jaw arm keeps the matching of the jaw teeth and the shaft side teeth through the elasticity, the winding shaft main body is driven to tighten and wind the rope, the shaft side teeth abut against the jaw teeth outwards in the process, and the rope is wound. The elastic claw arms of the seat clamping claws generate outward elastic deformation by means of elasticity, the shaft side teeth slide through the claw teeth along the corresponding tooth slopes on the claw teeth, and the claw teeth fluctuate in the direction close to or away from the shaft side teeth in the continuous rotating process. The claw teeth clamp the shaft side teeth by virtue of corresponding claw clamping surfaces on the claw teeth and position the winding shaft main body; when the rope object is released, the abutting driving part does not apply pressure to the seat clamping jaw, the jaw teeth are driven by deformation recovery of the elastic jaw arms to move outwards to be separated from the shaft side teeth, and the jaw teeth do not clamp the shaft side teeth. The shaft side teeth replace a traditional cover tooth structure. Relative rotation and clamping of the winding shaft and the cover body are achieved through the second axial limiting part and the third axial limiting part.