47results about How to "Solve the problem of loose fixation" patented technology

The invention relates to the technical field of medical instruments, in particular to a talonavicular fusion plate which comprises a fusion plate near end, a fusion plate far end and a fusion plate body connecting the fusion plate near end and the fusion plate far end. The fusion plate near end, the fusion plate far end and the fusion plate body are formed integrally. The fusion plate near end is provided with a fixing hole used for being fixedly connected with a talus bone, and the fusion plate far end is provided with a fixing hole used for being fixedly connected with a tarsal navicular bone. According to the talonavicular fusion plate, an anatomic design is adopted, the fusion plate does not need to be bent in advance in an operation, the problem that the fusion plate is prone to loose and fail to be fixed when being fixed by adopting hollow nails, straddle nails and the like is solved, and the problems that in a common fusion plate operation, the fusion plate needs to be bent, as a result, stress concentration is prone to occurring, the fusion plate is broken, the fixing holes are deformed, and the fusion plate is not firmly fixed are solved.

The invention provides a bone plate implanted from the front inner side of the distal femur, belonging to the technical field of medical apparatus and instruments for the department of orthopaedics, and used for treating the condylar fracture and bone shaft fracture of the distal femur. The technical scheme is as follows: the bone plate is composed of a bone plate condylar part, a transitional face and a bone plate shaft part which are connected together, wherein the bone plate condylar part is opposite to the front inner side surface of the condyle of the distal femur, the lower surface of the bone plate condylar part is adaptive to the front inner side surface of the condyle of the distal femur in shape, the bone plate shaft part is opposite to the inner side surface of the distal femur, the lower surface of the bone plate shaft part is adaptive to the inner side surface of the distal femur in shape, and a plurality of fixing holes are uniformly distributed on the bone plate condylar part and the bone plate shaft part. The bone plate provided by the invention belongs to an innovation for the bone plate for the distal femur, therefore, the problem that when the existing bone plate is implanted from the outer side of the distal femur, the fixation for the condyle fracture on the inner side of part of the distal femur is not firm is solved, and the fracture blocks on the inner side of the distal femur can be effectively and firmly fixed, so that the heal of the fracture blocks on the inner side is promoted, and therefore, the bone plate has extremely good promotion and utilization values in the industry.

The invention relates to a high-strength double-wall inclinometer casing for inclined displacement measurement. The high-strength double-wall inclinometer casing comprises a plurality of measuring pipe fittings, a plurality of pipe fitting connecting pieces and an axial pressure trigger self-opening type anchor hook base. The measuring pipe fittings are connected through the pipe fitting connecting pieces, the axial pressure trigger self-opening type anchor hook base is connected with the measuring pipe fitting which firstly conducts hole sinking, the measuring pipe fittings are provided with inner walls and outer walls, four concrete filling cavities of inner and outer pair arc structures are formed by the inner walls and the outer walls, a plurality of holes are formed in the outer walls, when the inclinometer casing is submerged in the bottom of drilled holes, pressure is exerted in the axial direction, the axial pressure trigger self-opening type anchor hook base is opened and is anchored to the pedestal rock, and when back filling is carried out on concrete, cement paste enters the concrete filling cavities through the holes. The inclinometer casing has the strong capability of resisting tension and pressure, resisting bending and resisting torsion, the compatible deformation capability of the inclinometer casing and the surrounding rock-soil layer is improved, the upward buoyancy of serous fluid on the inclinometer casing is reduced, and a base of the inclinometer casing and the bed rock are in the fixed connection state all the time.

The invention discloses a sealing device and a condensing unit of an evaporative cooling asynchronous motor stator and manufacturing methods thereof. The stator comprises a stator core and a stator winding which are mutual connected. The sealing device comprises a sleeve, two cavity side walls and two cavity connecting walls, wherein the sleeve is connected to an inner circle surface of the stator core; the outer edges of each cavity side wall are connected to an enclosure of an asynchronous motor in a seal mode; the outer ends of each cavity connecting wall are connected to the cavity side walls, and the inner ends of each cavity connecting wall are connected with the stator core along with the bending shape of an end part of the stator winding; and the sleeve, the two cavity side walls,the two cavity connecting walls and the enclosure form a stator seal cavity. In the invention, the unnecessary end part space is eliminated, so that the volume of the stator seal cavity is reduced, thus cooling medium liquids in the stator seal cavity are distributed reasonably, and the usage amount of the cooling medium is reduced therewith, thereby remarkably reducing the manufacturing cost of an evaporative cooling asynchronous motor, and improving the market competitiveness.

The invention discloses a hardware cutting machine excellent in fixing performance. The hardware cutting machine comprises a base, a controller is arranged on the front surface of the base, two workbenches are symmetrically arranged at the top of the base, a cutting platform is arranged at the top of the base, two supporting columns are symmetrically arranged at the top of the cutting platform, a rotating shaft is arranged between the supporting columns, two ends of the rotating shaft penetrate the supporting columns and are connected with first bearings arranged on one sides of the inner walls of the supporting columns, and a cutting blade is arranged on the rotating shaft. When the hardware cutting machine is in use, through a fixing device arranged at the top of a first automatic extensible rod, a second automatic extensible rod and a slider arranged inside the fixing device, a manipulator connected outside the fixing device and a resetting spring connected on the manipulator, the problem that hardware parts are infirm in fixing in the cutting process is solved, and errors generated during cutting are well avoided.

The present invention discloses a combined intelligent carbon contact strip bracket tool convenient for bi-directional lineation. The tool comprises a bottom plate, a supporting block is arranged at the middle portion of the inner top surface of the bottom plate, a vertically-upward motor is arranged at the bottom of the right end face of the bottom plate, and the motor is movably connected with the supporting block through a transmission mechanism; the bottom face of a lifting plate is movably connected with the top face of the supporting block through a connecting rod mechanism; two bottom ends of a carbon contact strip are respectively fixed on two sides of the top surface of the lifting plate through clamping assemblies; a second telescopic cylinder is arranged on the top face of the left side wall of the bottom plate, a second connecting block is arranged at the top end of a second telescopic rod, a vertical sliding rod is arranged on the top face of the right side wall of the bottom plate, and a scribing assembly is arranged between the top face of the second connecting block and the vertical sliding rod. The invention further discloses an operation method of the combined intelligent carbon contact strip bracket tool convenient for bi-directional lineation. The combined intelligent carbon contact strip bracket tool is simple in structure and convenient to operate, scribing is conducted on the carbon contact strip with the assistance of the bracket tool, scribing accuracy and rapidness are improved, scribing efficiency and precision are improved, and machining cost isreduced.

The invention discloses a sealing device and a condensing unit of an evaporative cooling asynchronous motor stator and manufacturing methods thereof. The stator comprises a stator core and a stator winding which are mutual connected. The sealing device comprises a sleeve, two cavity side walls and two cavity connecting walls, wherein the sleeve is connected to an inner circle surface of the stator core; the outer edges of each cavity side wall are connected to an enclosure of an asynchronous motor in a seal mode; the outer ends of each cavity connecting wall are connected to the cavity side walls, and the inner ends of each cavity connecting wall are connected with the stator core along with the bending shape of an end part of the stator winding; and the sleeve, the two cavity side walls, the two cavity connecting walls and the enclosure form a stator seal cavity. In the invention, the unnecessary end part space is eliminated, so that the volume of the stator seal cavity is reduced, thus cooling medium liquids in the stator seal cavity are distributed reasonably, and the usage amount of the cooling medium is reduced therewith, thereby remarkably reducing the manufacturing cost of an evaporative cooling asynchronous motor, and improving the market competitiveness.

The invention discloses a crane type multifunctional pipeline dredging dumper and relates to the field of dredging equipment. The crane type multifunctional pipeline dredging dumper comprises a second-class chassis and further comprises a crane device, an engine, a speed changer, a power take-off device, a gear oil pump, a dumping device, a hydraulic station, a heat dissipating device, a hydraulic oil tank, a first hydraulic winch, a second hydraulic winch, a microcomputer controller, a remote control receiver all of which are arranged on the second-class chassis, and a grab bucket, a locking device, a deposition drawing device, an overturning device and a guiding fixing device all of which are carried by the dumper. The deposition drawing device and the grab bucket are provided with pull ring assemblies steering flexibly. On the deposition drawing device, connection between a movable cover and a cylinder is reinforced, and a slope is arranged to prevent the situation that blockage substances cannot be dumped completely. A rope sliding device solves the problem that fixation with the mouth of a well is not firm. Functionally, the crane type multifunctional pipeline dredging dumper can dig vertical shafts and can also dig transverse pipelines; the dumper can be washed after operation is completed. In operation, due to the high automation degree, operation is easy, and manpower and material resources can be saved.

The invention discloses a connecting device capable of reducing stress of heating pipes of a roasting furnace. The device comprises an outer furnace barrel in which an inner furnace barrel is arranged, wherein a first heating pipe, a second heating pipe, a third heating pipe and a fourth heating pipe are correspondingly arranged around the inner furnace barrel and are all connected through arc-shaped bends; one end of the first heating pipe and one end of the third heating pipe are provided with positioning plates; a damping device is arranged at one end of each positioning plate; two fixing rods are fixed to the sidewall of one inner end of the outer furnace barrel; and a mounting plate is fixed to the lower end of each fixing rod. According to the device, the problem that two sections ofexisting heating pipes at each layer are connected through an annular pipe which leads to high stress can be solved; the arc-shaped bends are used for connecting, so that the stress applied to the heating pipes of the roasting furnace is reduced, and welding seams of the heating pipes are prevented from tearing, and as a result, the running time of the heating pipes of the roasting furnace can beincreased; and the convenience of use is ensured.

The invention provides a rope locker which comprises a main plate and an assistant plate, wherein a first groove is formed in the lower part of the first surface of the main plate and a first fixing hole is formed in the upper part of the first surface, a second groove is formed in the lower part of the first surface of the assistant plate correspondingly, and a second fixing hole is formed in the upper part of the first surface of the assistant plate correspondingly; when the first surface of the main plate and the first surface of the assistant plate are fit on a track, the first groove and the second groove form a space for accommodating the track, and a bolt penetrates the first fixing hole and the second fixing hole and fixes the upper part of the main plate and the upper part of the assistant plate; and a clamping ring used for confining a winch rope is arranged on the surface of the main plate facing the center of the two tracks. The rope locker provided by the invention is simple and practicable, the fixing point is easy to choose, and the fixing of a steel wire rope in the process of winding rope by a puffer is realized.

The invention discloses a tensioning mechanism suitable for automatic equipment. The tensioning mechanism suitable for the automatic equipment comprises a tensioning mechanism fixing plate; a slidingplate is arranged in the middle position of the upper surface of the tensioning mechanism fixing plate; a screw rod is arranged on one side of the sliding plate; a second nut is arranged on the outersurface of one end of the screw rod; a hand wheel connecting rod is arranged inside one end of the screw rod; and a first nut is arranged at one end of the hand wheel connecting rod, and a hand wheelis arranged at the other end of the hand wheel connecting rod. As a telescopic column and a spring are designed on the outer surface of one end of a clamping block connecting rod, the situation that abolt is loosened and not firmly fixed when directly used for fixing due to machine vibration in the using process of the tensioning mechanism suitable for the automatic equipment is avoided; by arranging the telescopic column and the spring in the surface of one end of the clamping block connecting rod in a sleeved mode, the tensioning mechanism fixing plate and a fixed bottom plate are connectedthrough clamping fit of a clamping block and a clamping groove, and at the moment, a third nut is screwed so that the tensioning mechanism fixing plate and the fixed bottom plate are firmer under action of the telescopic column and the spring.

The invention discloses an overhaul grounding lap joint rod with an automatic clamping mechanism. The overhaul grounding lap joint rod comprises a clamping block, a fixed right-angle strip, an automatic clamping mechanism, a rod body, an insulating handle sleeve, a following mechanism and a fixed sheet, wherein the left side of the bottom of the clamping block is fixedly connected with the left top of the fixed right-angle strip, the middle of the fixed right-angle strip is fixedly connected with the middle of the automatic clamping mechanism, the bottom end of the automatic clamping mechanismis fixedly connected with the top of the rod body, the bottom of the rod body is in interference fit with the middle of the insulating handle sleeve, the bottom of the left side of the fixed right-angle strip is fixedly connected with the right side of the fixed sheet, and the middle of the left side of the fixed sheet is rotationally connected with the top of the following mechanism. According to the overhaul grounding lap joint rod with the automatic clamping mechanism, a cable is placed between a fixture block and a clamping block, a motor is started to drive a gear to rotate, and the geardrives a rack to move upwards to enable the clamping block to get close to the fixture block, so that the purpose of automatically clamping the cable can be effectively achieved, and the problem thatan overlapping rod of an existing grounding wire is directly hung on a cable and cannot be automatically fixed can be effectively solved.

The invention discloses an electronic motor, comprising a stator, a rotor, a rear insulating bracket and a circuit board. The stator consists of a stator fork and a pole piece, wherein the center of the pole piece is provided with a through hole, and a pole shoe extends from the periphery of the pole piece. A radial electrode is arranged at the pole shoe which is provided with a larger arched edge, a formed concave part is arranged at the arched edge, and the inner diameter of the concave part is slightly larger than that of the edge of pole shoe. The invention also discloses a shell of the electronic motor, comprising a casing which consists of a shell, an end cover matched with the shell and a power line, wherein the shell is provided with a notch, one end of the power line connected with the shell is provided with a base adaptive with the notch of the shell, the periphery of the base matched with the notch is provided with a guide slot, and the power line and the shell are spliced together through the guide slot and the edge of the notch. The invention improves the efficiency of the motor and effectively solves the problem that the fixation of plastic shell and the power line is infirm.

The invention discloses a maintenance grounding lap bar with an automatic clamping mechanism, which includes a clamping block, a fixed right-angle bar, an automatic clamping mechanism, a rod body, an insulating handle cover, a following mechanism and a fixing piece, and the left side of the bottom of the clamping block is fixed Connect the top left side of the fixed right-angle bar, the middle part of the fixed right-angle bar is fixedly connected to the middle part of the automatic clamping mechanism, the bottom of the automatic clamping mechanism is fixedly connected to the top of the rod body, the bottom of the rod body is interference fit with the middle part of the insulating handle glove, and the bottom left side of the fixed right-angled bar is fixedly connected to the fixed piece On the right side, the middle part on the left side of the fixed piece rotates and connects with the top of the follower mechanism. The maintenance grounding lap rod with automatic clamping mechanism places the cable between the clamping block and the clamping block, the motor starts to drive the gear to rotate, and the gear drives the rack to move upwards so that the clamping block is close to the clamping block, which can effectively The purpose of automatically clamping the cable is achieved, which can effectively solve the problem that the existing lapping rod of the grounding wire is directly hung on the cable and cannot be fixed automatically.

The invention relates to the technical field of refractory materials, and discloses a large refractory glass brick safe storage and transportation tool which comprises a damping seat, a mounting plate is movably connected to the upper portion of the damping seat, a clamping mechanism is movably connected to the upper portion of the mounting plate, and a movable plate is movably connected to the upper portion of the clamping mechanism. Through cooperation of a reciprocating screw rod, a lifting cylinder and a connecting push rod, clamping plates are pushed to move towards the inner side, glass bricks are fixed, the glass bricks are prevented from inclining and colliding, sliding blocks on upper spring rods and lower spring rods in damping seats move towards the two sides, springs on the outer sides are compressed, and the glass bricks are prevented from inclining and colliding. And through the hinge block, the hinge inclined rod, the polyurethane elastomer, the matched balance rod and the balance spring on the outer side, the balance of the whole device is kept, and the situation that the glass bricks incline, collide with one another and are damaged is prevented.

The present invention discloses a combined intelligent carbon contact strip bracket tool convenient for bi-directional lineation. The tool comprises a bottom plate, a supporting block is arranged at the middle portion of the inner top surface of the bottom plate, a vertically-upward motor is arranged at the bottom of the right end face of the bottom plate, and the motor is movably connected with the supporting block through a transmission mechanism; the bottom face of a lifting plate is movably connected with the top face of the supporting block through a connecting rod mechanism; two bottom ends of a carbon contact strip are respectively fixed on two sides of the top surface of the lifting plate through clamping assemblies; a second telescopic cylinder is arranged on the top face of the left side wall of the bottom plate, a second connecting block is arranged at the top end of a second telescopic rod, a vertical sliding rod is arranged on the top face of the right side wall of the bottom plate, and a scribing assembly is arranged between the top face of the second connecting block and the vertical sliding rod. The invention further discloses an operation method of the combined intelligent carbon contact strip bracket tool convenient for bi-directional lineation. The combined intelligent carbon contact strip bracket tool is simple in structure and convenient to operate, scribing is conducted on the carbon contact strip with the assistance of the bracket tool, scribing accuracy and rapidness are improved, scribing efficiency and precision are improved, and machining cost isreduced.

The invention provides a disposable self-adaptive puncture avulsion sheath. The sheath comprises a sheath canal, canal plugs and a canal seat, the canal seat is formed by splicing two tearable parts, and a containing cavity is formed in the canal seat; the canal plug communicated with the containing cavity is arranged on each tearable part; the upper end of the sheath canal enters the containing cavity from a lower port of the containing cavity and is fastened through the canal plugs; and the top of the canal seat is of a Luer taper structure. By adopting the structure that the sheath canal is naturally cracked, the problem that the sheath canal needs to be punctured and replaced for many times when puncture needles and ablation needles of different models are used is solved, and puncture and ablation positioning is more convenient and efficient. The canal seat is connected with a puncture needle Luer taper, so that the stress is uniform and stable in the puncture process. The tail of the sheath canal shrinks and is in smooth transition to be attached to the puncture inner needle, puncture resistance is conveniently reduced, and puncture is facilitated. A canal seat groove and a canal seat groove buckle are fastened, so that the problem of mistaken tearing is solved. The sheath canal is fixed by pressing and riveting the canal plugs and the canal seat, so that the problem that the sheath canal is not firmly fixed is solved.

The invention discloses a tightenable expansion screw, which includes screws, support plates, connecting plates, elastic fixing plates, buffer plates, nuts, screws, and stabilizing plates; the invention provides a tightenable expansion screw, through which the toilet lid This tightenable expansion screw is fixed on the toilet, which can not only solve the problem of cracks in the toilet due to the friction between the stainless steel screw and the porcelain material toilet, but also solve the problem that when the ordinary expansion screw is used for fixing, the opening of the ordinary expansion screw is easy to slip, causing the fixation Not a tight question.

The invention provides a bone plate implanted from the front inner side of the distal femur, belonging to the technical field of medical apparatus and instruments for the department of orthopaedics, and used for treating the condylar fracture and bone shaft fracture of the distal femur. The technical scheme is as follows: the bone plate is composed of a bone plate condylar part, a transitional face and a bone plate shaft part which are connected together, wherein the bone plate condylar part is opposite to the front inner side surface of the condyle of the distal femur, the lower surface of the bone plate condylar part is adaptive to the front inner side surface of the condyle of the distal femur in shape, the bone plate shaft part is opposite to the inner side surface of the distal femur, the lower surface of the bone plate shaft part is adaptive to the inner side surface of the distal femur in shape, and a plurality of fixing holes are uniformly distributed on the bone plate condylar part and the bone plate shaft part. The bone plate provided by the invention belongs to an innovation for the bone plate for the distal femur, therefore, the problem that when the existing bone plate is implanted from the outer side of the distal femur, the fixation for the condyle fracture on the inner side of part of the distal femur is not firm is solved, and the fracture blocks on the inner side of the distal femur can be effectively and firmly fixed, so that the heal of the fracture blocks on the inner side is promoted, and therefore, the bone plate has extremely good promotion and utilization values in the industry.

The invention discloses a crane-type multifunctional pipeline dredging dump truck, which relates to the field of dredging equipment. The present invention includes a second-class chassis, a crane device, an engine, a transmission, a power take-off, a gear oil pump, a self-unloading device, a hydraulic station, a radiator, a hydraulic oil tank, a first hydraulic winch, a second hydraulic winch, Microcomputer controller, remote control receiver, and dredging grab, locker, dredging device, flipping device, guiding and fixing device carried on the vehicle; the present invention is provided with a flexible pull ring assembly on the dredging device and grab ;On the silt removal device, not only the connection between the movable cover and the cylinder is strengthened, but also a slope is set to prevent the incomplete dumping of silt; on the sliding rope device, the problem of not being firmly fixed to the wellhead is solved; , It can also dig horizontal pipes; it can also wash the car at the end of the operation; in operation, due to the high degree of automation, the operation is simple and saves manpower and material resources.

The invention discloses an environment-friendly water heater mounting mechanism and a using method thereof. The environment-friendly water heater mounting mechanism comprises a support and a water heater, the water heater is located in one side of the support, a limiting frame is slidably connected to the interior of one side of the support, a limiting groove and a clamping block are arranged on one side of the water heater, and the limiting frame is slidably connected with the clamping block; a groove hole is formed in the support, a limiting device mutually connected with the limiting groovein a clamped mode is rotationally connected into the groove hole, a positioning device located in the groove hole is integrally connected into the support, an adjusting device is rotationally connected to one side of the support, and the adjusting device is rotationally connected with the limiting device through a rotating block; and structures of the limiting groove and the limiting device are used for clamping and fixing the water heater. The problems that an existing mode of water heater fixing through screws is inconvenient, and the water heater is not firmly fixed due to screw looseningare solved, and the fixing effect on the water heater is better.

The invention provides a rope locker which comprises a main plate and an assistant plate, wherein a first groove is formed in the lower part of the first surface of the main plate and a first fixing hole is formed in the upper part of the first surface, a second groove is formed in the lower part of the first surface of the assistant plate correspondingly, and a second fixing hole is formed in the upper part of the first surface of the assistant plate correspondingly; when the first surface of the main plate and the first surface of the assistant plate are fit on a track, the first groove and the second groove form a space for accommodating the track, and a bolt penetrates the first fixing hole and the second fixing hole and fixes the upper part of the main plate and the upper part of the assistant plate; and a clamping ring used for confining a winch rope is arranged on the surface of the main plate facing the center of the two tracks. The rope locker provided by the invention is simple and practicable, the fixing point is easy to choose, and the fixing of a steel wire rope in the process of winding rope by a puffer is realized.

The invention relates to a high-strength double-wall inclinometer casing for inclined displacement measurement. The high-strength double-wall inclinometer casing comprises a plurality of measuring pipe fittings, a plurality of pipe fitting connecting pieces and an axial pressure trigger self-opening type anchor hook base. The measuring pipe fittings are connected through the pipe fitting connecting pieces, the axial pressure trigger self-opening type anchor hook base is connected with the measuring pipe fitting which firstly conducts hole sinking, the measuring pipe fittings are provided with inner walls and outer walls, four concrete filling cavities of inner and outer pair arc structures are formed by the inner walls and the outer walls, a plurality of holes are formed in the outer walls, when the inclinometer casing is submerged in the bottom of drilled holes, pressure is exerted in the axial direction, the axial pressure trigger self-opening type anchor hook base is opened and is anchored to the pedestal rock, and when back filling is carried out on concrete, cement paste enters the concrete filling cavities through the holes. The inclinometer casing has the strong capability of resisting tension and pressure, resisting bending and resisting torsion, the compatible deformation capability of the inclinometer casing and the surrounding rock-soil layer is improved, the upward buoyancy of serous fluid on the inclinometer casing is reduced, and a base of the inclinometer casing and the bed rock are in the fixed connection state all the time.

The invention relates to a fixed bracket snap-fit ​​rotary fin heat exchanger, which comprises a coiled layer structure spiral finned tube, at least two sets of spiral finned tube plane fixing frames clamped outside the spiral finned tube, and the plane fixing frame connecting The plate and the bottom fixing plate, the spiral finned tubes on the upper part of the spiral finned tube are connected and fixed by the plane fixing frame connecting plate at the end of the spiral finned tube plane fixing frame; the bottom of the spiral finned tube is in the same plane. The finned tubes are clamped in two sets of spiral finned tube plane fixing frames arranged in parallel. The ends of the same side of the two sets of spiral finned tube plane fixing frames are screwed with the bottom fixing plate through screws, and each bottom fixing plate is connected to the lower part. The ends of the plane fixing frame of the spiral finned tube corresponding to each layer of the spiral finned tube are connected and fixed to each other through the connecting plate of the plane fixing frame; the parts of the invention have simple structure, convenient processing, low cost, and fast and efficient assembly between parts , The components are firmly fixed and not easy to loosen.

The invention discloses a wide-angle optical lens. The optical lens comprises a lens body and a lens cover, a fixing shell sleeves the lens body, and a lens fixing unit is arranged in the fixing shell; a sleeve is arranged outside the lens fixing unit, and a round base is arranged in the sleeve; positioning rods are arranged at the two ends of the radial line of the round base respectively, a sliding ring is arranged between the fixing shell and the sleeve, and the sliding ring is movably connected with the sleeve through threads; a fixed clamping ring is arranged in the sleeve, an elastic part is arranged outside the fixed clamping ring, and the elastic bottom is tightly fixed to the inside of the sleeve. The wide-angle optical lens can actively adjust the focal length of an internal lensaccording to the preference of a user so as to meet different photographing requirements.

The invention discloses a lightning-protection puncture ground clamp, which comprises a fixed ring, wherein a hollow cartridge is fixedly arranged at the bottom end of the fixed ring; a rotating shaft of which one end extends to the outside of the bottom end of the cartridge is movably arranged in the cartridge; locating mechanisms which are tangent with the rotating shaft are movably arranged at two sides of the cartridge; a winding blocking wheel is fixedly arranged on the rotating shaft; two parallel torsion springs are fixedly arranged in the fixed ring; a snap ring I and a snap ring II which extend to the outside of the fixed ring are fixedly arranged at one end of the two torsion springs respectively; and a clamping groove matched with the snap ring I is formed in the top end of the snap ring II. According to the lightning-protection puncture ground clamp, the snap rings are expanded by arranging the winding blocking wheel capable of rotating to pull a steel wire, the snap rings can be closed through use in cooperation with the torsion springs, and the lightning-protection puncture ground clamp can be more conveniently installed and used under the fixation of the locating mechanisms, does not fall off in use for a long period of time and is high in safety and convenience.

The invention provides a transferring and packaging tray of a cooling fan. The transferring and packaging tray comprises a tray and a mounting seat assembly arranged on the tray. The tray is rectangular at the overlooking angle. Multiple groove structures arranged in an array manner are formed on the surface of the tray. Each groove structure forms a corresponding protruding portion on the back face of the tray. The mounting seat assembly is fixedly mounted in the center of the surface of the tray and comprises a base and two symmetric supports. The base is fixed to the tray through bolts. Thetwo symmetric supports are arranged at the two opposite ends of the base correspondingly. A connecting plate is fixedly mounted on each support, and a limiting plate is arranged on each connecting plate. Compared with the prior art, the mounting seat assembly is arranged in the tray, the cooling fan is reinforced through the mounting seat assembly, and the problem that the cooling fan is not fixed firmly in the transporting process can be effectively solved.