58results about How to "Restrict direction of movement" patented technology

The invention discloses a production device of a double-wall corrugated pipe. The production device comprises a protection shell, an installation plate and a press roller, wherein the protection shellis fixedly installed on the base; a rotatable cylinder is installed in the protection shell in a rotatable manner; and the installation plate is fixedly installed on one end of the rotatable cylinder, and the other end is uniformly connected to multiple connecting plates along the peripheral direction. Outside of the corrugated pipe is heated by electric heating wires inside two press plates; a limiting plate close to each of the press plates can be moved up and down under driving of a second electric telescopic pillar, so the corrugated pipe can be bent; and a bending radian can be adjustedaccording to a vertical motion height of the second electric telescopic pillar. In addition, through stretching and contracting of a first electric telescopic pillar, the upper limiting plate can be driven to move on the base; and the distance between the protection shell is changed, so the bending radian of a pipeline can be changed. The corrugated pipe can be comprehensively processed and can beapplicable to different working demands; and efficiency and quality of processing are better.

The invention relates to a device for enabling a wheelchair to get on a bus in the field of municipal facility supplies. The device is composed of a rain shed, an advertising board, a platform and a moving table, a clamping mechanism is arranged inside the moving table, and a driving device is arranged inside the platform at the lower end of the moving platform. The device is compact in structureand simple to operate, capable of quickly conveying a passenger sitting on the wheelchair onto the bus, time-saving, labor-saving and high in working efficiency. The platform is provided with a slopewhich can bring convenience to the passenger sitting on the wheelchair to travel onto the platform, and the moving table is driven to move by a chain, thereby being stable in movement and free of impact; the clamping mechanism is arranged inside a moving table box, so that safety accidents caused by wheel movement after the wheelchair moves onto the moving table can be prevented; other passengerscan enter the bus through the moving table after the passenger sitting on the wheelchair enters the bus through the moving table, so that no impact is had on other passengers for entering the bus.

The invention discloses an ironing device for processing suit fabric. The ironing device comprises a bottom box and a working box, wherein the working box is arranged on the top of the bottom box; a feed conveying belt is arranged on one side of the working box, and a feeding conveying belt is arranged on the other side of the working box; a box cover is arranged on the top of the working box; a top plate is arranged above the box cover; two ironing structures are arranged on the top plate; and when a placement plate moves to the position under ironing plates, an adjusting motor is controlledto stop running, meanwhile, a hydraulic rod in a first hydraulic cylinder is controlled to move downwards through the first hydraulic cylinder, and due to the fact that a limiting rod penetrates through the interior of a limiting sleeve on a limiting plate, when the hydraulic rod pushes a lifting plate to move downwards, the moving directions of the ironing plates are limited, so that the ironingplates stably move downwards, the moving stability of the ironing plates is improved, the suit fabric is integrally attached to the bottom surfaces of the ironing plates, the ironing effect is improved, the phenomenon that the flatness of suit is inconsistent due to different ironing time is avoided, and the ironing quality is improved.

The invention discloses an automatic guided vehicle (AGV) forklift type intelligent carrying robot. The AGV forklift type intelligent carrying robot comprises a sweep template and a control room, thecontrol room is arranged at one end of the top of the sweep template, two supporting columns are arranged on the sweep template of one side of the control room, and the two supporting columns are perpendicular to the top surface of the sweep template. A stiffening plate is arranged at the bottom position between the two supporting columns, a sucking cup is controlled to move to the top surface ofa cargo, when the sucking cup is in contact with the top surface of the cargo, two second internal piston rods are controlled to move downwards correspondingly through two second hydraulic cylinders,the two second piston rods push the bottom sucking cup to move downwards, so that the sucking cup is tightly close to the top surface of the cargo, when the sucking cup is stressed, a moving plate moves upwards along a sliding rail, a spring is compressed to reduce pressure to the sucking cup, so that the cargo is fixed, the risk of cargo falling off during forklift moving is avoided, cargo delivery safety is ensured, the sucking cup is prevented from being damaged due to excessive stress, and the service life of the sucking cup is prolonged.

The invention discloses an outer wall work device for building construction. The device comprises a mounting plate, a loading frame and a hanging basket frame. The loading frame is welded to the bottom of the mounting plate, the hanging basket frame is movably clamped to the top of the mounting plate, side plates are welded to the upper end and the lower end of the periphery of the hanging basketframe, penetrating holes are formed in the periphery of the middle of each side plate, multiple third electric telescopic columns are evenly formed in the bottoms of the penetrating holes, a second inflation bag is arranged on one side of the hanging basket frame, L-shaped buckles are welded to the two sides of the bottom of the hanging basket frame, and sliding grooves are formed in the middles of the two sides of the mounting plate in the length direction. When a worker works in the hanging basket frame, stability property is good, shaking is not prone to happening, and safety is achieved. After the device encounters the large wind in the high air, the safety of the building and the whole hanging basket frame can be protected, and damage is not prone to happening. The device is convenient to use, easy to operate, capable of ensuring safety and free of affecting normal work of a worker.

The invention discloses flatness detection equipment for building construction. The equipment comprises a bottom plate, a plurality of detection holes are formed in the bottom end of the bottom plate,a first motor is arranged at the upper end of the bottom plate, a plurality of detection plates are arranged outside the first motor, distance measuring devices are arranged at the lower ends of thedetection plates, and sliding rods are fixedly connected to the upper ends of the distance measuring devices, penetrate through the detection plates and are fixedly connected with the detection plates. The first motor, the detection plate, the distance measuring device and the detection hole are matched with one another; the first motor is started to move the distance measuring device; therefore,the flatness of the ground is detected; then the adjusting rod, the adjusting ring, the first clamping groove, the first clamping block and other components are matched with one another, a worker adjusts the height of the mounting plate according to measurement data of the distance measuring device, the flatness of the detection device in the detection box is ensured, the correctness of the detection data of the detection device is ensured, errors caused by uneven ground are reduced, and the detection precision and the data reliability of the device are improved.

The invention relates to an intelligent power distribution management system, and relates to the technical field of power distribution management. The system comprises a cabinet body, a cabinet door hinged to the cabinet body, a mounting plate slidably connected into the cabinet body and an electric appliance fixed to the mounting plate, and a driving mechanism used for driving the mounting plate to move is arranged on the cabinet body; and when the cabinet body works normally, the cabinet door is closed, the interior of the cabinet body is kept in a closed state, when an electric appliance needs to be overhauled, the cabinet door is opened, the mounting plate is driven by the driving mechanism to move, the mounting plate pushes the electric appliance to move towards the side close to the cabinet door, and when the electric appliance gets close to the cabinet door, the driving mechanism stops moving of the mounting plate. Therefore, the influence of the cabinet body on the maintenance of the electrical appliances by workers is reduced, the time spent by the workers on the maintenance of the electrical appliances is reduced, and the maintenance efficiency of the electrical appliances is improved.

Embodiments of the present application disclose a linear plasma source applied to the field of solar cell production. A linear plasma source comprising a housing which forms a reaction chamber having an outlet; a gas intake system comprising an internal pipeline which is mounted on the housing and located inside the reaction chamber for releasing reaction gas into the reaction chamber; an electrode system comprising at least two electrode plates which are mounted on the housing and located around the internal pipeline within the reaction chamber; and an electromagnetism system comprising an electromagnetic coil, and the electromagnetic coil is mounted at the outlet of the reaction chamber of the housing and has a plasma outlet. The embodiments of the present application have a simple structure, a low production cost, a good uniformity and a high film compactness.

The invention provides a movable subway station side wall supporting steel formwork supporting device, and belongs to the field of geotechnical engineering. The movable subway station side wall supporting steel formwork supporting device comprises a formwork supporting assembly, a walking assembly, a steel formwork assembly and a ground anchor assembly, wherein the walking assembly is connected with the formwork supporting assembly; the formwork supporting assembly is detachably connected with the formwork supporting assembly; and the formwork supporting assembly is connected with the ground anchor assembly so as to be kept fixed. The invention further provides a supporting method. The supporting method comprises the following steps that S1, the ground anchor assembly is pre-buried; S2, the steel formwork assembly is installed; S3, two supporting frames are connected with connecting cross beam together; S4, each supporting screw rod is adjusted; and S5, the multiple steel formwork assemblies are assembled. The movable subway station side wall supporting steel formwork supporting device and the supporting method have the beneficial effects that the steel formwork supporting device can integrally move, the side wall construction efficiency is improved, and the standardized construction level is improved; and the supporting method is convenient to construct and operate, high in efficiency, high in turnover speed, capable of saving cost, high in safety and reliability and capable of guaranteeing the construction quality of the side wall.

The invention discloses a cable support for computer network communication, which comprises a mounting box, wherein positioning plates are fixedly connected to the top and the bottom of the mounting box; a positioning hole is formed in the right side of the positioning plate, an opening is formed in the right side of the mounting box, the right side of the support extends to the right side of theopening, movable blocks are fixedly connected to the left side of the front side and the left side of the rear side of the support, and sliding grooves used in cooperation with the movable blocks areformed in the front side of an inner cavity of the mounting box and the rear side of the inner cavity. According to the invention, the mounting box, the positioning plate, the positioning hole, the movable blocks, positioning grooves, a first clamping block, a trapezoidal groove, the opening, a bracket, a first spring, a groove, the sliding grooves, a shell, a second spring, a pushing hole, a pushing block, a movable rod, a limiting plate and a second clamping block are matched for use, so that the cable support has the advantages that the length of the cable support can be flexibly adjusted,the use space is saved, and a cable can be fixed.

The invention discloses a neurosurgical operation treatment body position fixator which comprises a bottom plate, the left side of the bottom of the bottom plate is fixedly connected with a mounting plate; the left side of the top of the mounting plate is fixedly connected with an electric telescopic rod; a headrest is fixedly connected to the top of the electric telescopic rod, vertical plates are fixedly connected to the front side and the rear side of the top of the headrest, rotating handles are arranged on the opposite sides of the two vertical plates, threaded rods are fixedly connectedto the sides, close to the vertical plates, of the rotating handles, and the sides, close to the vertical plates, of the threaded rods penetrate through the vertical plates and are movably connected with clamping blocks. Through cooperative use of the bottom plate, arm supporting plates, fixing belts, the mounting plates the electric telescopic rod, the headrest, the vertical plates, the rotatinghandles, a first sponge cushion, connecting blocks, rotating shafts, clamping plates, leg supporting plates, mounting grooves, the threaded rods, the clamping blocks, sliding grooves, threaded sleeves, left-hand threads and right-hand threads, the neurosurgical operation treatment body position fixator has the advantages of being convenient to operate, firm in fixation of the body position of a patient and good in comfort.

The invention provides an intelligent wrench. The intelligent wrench comprises a handle, a shell, a transmission mechanism and a sleeve. The transmission mechanism is arranged inside the shell and comprises a driving device and a transmission shaft, and the transmission shaft is connected with the sleeve. The intelligent wrench is characterized in that the sleeve comprises a locking plate and an adjustable locking part, the adjustable locking part is arranged on the locking plate and comprises a plurality of locking sliding blocks and connecting pieces, and the number of the locking sliding blocks is equal to that of the connecting pieces; the two ends of each connecting piece are connected with the two corresponding adjacent locking sliding blocks; each locking sliding block comprises a first abutting face and a second abutting face, the first abutting face of each locking sliding block abuts against the second abutting face of the corresponding adjacent locking sliding block, and the first abutting faces can slide relative to the second abutting faces; and a wrench jaw with a size-adjustable opening is defined by the first abutting faces of the locking sliding blocks in an enclosed mode, and the locking sliding blocks are matched in sequence so as to make the wrench jaw form a regular polygon structure. The intelligent wrench is simple in structure, reasonable in design, high in working efficiency, wide in application range and capable of being operated in a narrow and small space.

The invention relates to anti-caking piezoelectric ceramic production equipment which comprises a main body, a feeding pipe, a discharging pipe and two supporting columns; and further comprises a cleaning mechanism and two crushing mechanisms; each crushing mechanism comprises a crushing plate, a driving assembly, a rotating shaft, a first bearing, a second bearing, a sleeve, a connecting assembly, a first spring, a power assembly, a moving plate and two moving rods; the cleaning mechanism comprises two stirring assemblies and two cleaning assemblies; each cleaning assembly comprises a scraping plate, two connecting ropes, two fixed pulleys and two second springs; the stirring assembly comprises a connecting shaft, two rotating units and a plurality of stirring blades; according to the anti-caking piezoelectric ceramic production equipment, the crushing function is achieved through the crushing mechanisms, the phenomenon that materials are caked during mixing is avoided, the mixing quality is improved, the cleaning function is achieved through the cleaning mechanism, and the situation that the mixing effect is affected due to the fact that the materials adhere to the inner wall isavoided.

The invention discloses an operation guy cable detection device, which comprises a stand, a tension device, a first range finder, a stretching elastic piece, a second range finder, a dynamometer and adirection changing wheel, the first range finder comprises a first measuring rod and a first measuring seat, wherein the first measuring rod is connected between a first end of the operation guy cable and the tension device, the first measuring seat is in sliding fit with the first measuring rod in the extending direction of the first end of the operation guy cable, and at least one of the firstmeasuring rod and first measuring seat is provided with a length scale; the second range finder comprises a second measuring rod and a second measuring seat, wherein at least one of the second measuring rod and second measuring seat is provided with a length scale. The operation guy cable detection device can effectively solve the problem that the operation guy cable experiment is inconvenient.

The invention discloses a three-phase multifunctional electric power instrument with anti-burning performance, which belongs to the technical field of electric power instruments and comprises a fixedplate, a mounting plate is slidably connected to the front surface of the fixed plate, a rock wool protective shell is fixedly connected to the front surface of the fixed plate, and an electric powerinstrument body is fixedly mounted in the rock wool protective shell. Two reset springs are fixedly connected to the back face of the mounting plate, a fireproof cover is fixedly connected to one endof the back face between the two reset springs, and the fireproof cover is located on the front face of the electric power instrument body. According to the invention, the reset springs push the fireproof cover to the rock wool protective shell until the fireproof cover completely covers the electric power instrument body, the fireproof cover touches the valve on the water conveying pipe, coolingwater in the water storage tank falls into the water conveying pipe when the valve is opened, and the water conveying pipe sprays the cooling water out of the nozzle to extinguish fire. The problem that the conventional power meter cannot be self-protected in case of a fire is solved.

The invention discloses a limiting device of parking equipment for two-layer lifting and transverse moving. The limiting device comprises a base and an underframe, wherein a conveying table is arranged above the underframe, a plurality of rotating shafts are arranged in the conveying table, a vertical plate is arranged on the side wall of one end of the conveying table, as vehicles of the same type have different appearance structures and different bearing structure positions, a third hydraulic rod in a third hydraulic cylinder is controlled to move to the outer side of a cylinder body throughthe third hydraulic cylinder, the third hydraulic rod pushes the vertical plate to rotate, so that the bottom end of the third hydraulic cylinder rotates along an oval block on a transverse plate, height adjustment work of the conveying table is achieved, the output end of a motor drives a rotary rod to rotate, an adjusting plate rotates when the rotary rod rotates, the contact position of a rubber pad and a vehicle is adjusted, a vehicle bearing structure is contacted with the rubber pad, the damage to a vehicle window or a vehicle door is avoided, the safety of the vehicle when adjustment is carried out is protected, and the purpose of adjusting positions of the vehicles of different structural positions due to different appearance structures of the same type is achieved.

The invention discloses stretching pliers for operation of gynaecology. The stretching pliers comprise a supporting plate, a sliding block and a horizontal plate, wherein a bending block is fixedly arranged at one end of the supporting plate; a first U-shaped column is arranged at the other end of the supporting plate; one end of the first U-shaped column is fixedly connected with the supporting plate; when a fixing rod rotates, one end of the fixing rod penetrates through the inner part of a nut, and is connected with the nut through threads, so that a first fixing block on the fixing rod moves in the direction of an adjusting groove; the sliding block is clamped between the first fixing block and the supporting plate to fix the position of the sliding block, so that the operation of fixing the position of the fixing plate is realized, the function of adjusting the position of the fixing plate is achieved, and the stretching pliers are suitable for different ill locations of differenthuman bodies; a piston rod is pulled outwards, so that a rubber stopper moves to the outer side of a fluid sucking cylinder; hydrops produced in the human bodies in a surgery can be drained in time through a fluid sucking hole in one end of a drainage pipe, so that the surgery time is shortened, the internal condition of the human bodies is convenient to observe, the surgery is convenient, and the surgery safety is improved.

A rotary screen printing press includes: a screen plate (201A); a squeegee (213); squeegee supporting means for supporting the squeegee (213); and a worm and a worm wheel. The squeegee supporting means includes: a supporting plate swingably supported and supporting the worm and the worm wheel; an eccentric sleeve configured to adjust the position of the center of swinging movement of the supporting plate; and a contact surface and a screw configured to limit the direction of the movement of the supporting plate. The eccentric sleeve and the contact surface and screw cooperate with each other to move the tip of the squeegee along the tangent line of an impression cylinder (100) at a position at which the screen plate (201A) and the squeegee (213) contact each other.

The invention provides a labor-saving manually-operated wire rope cutting device. The device comprises a base, a support plate and a cutting knife, wherein a collecting box is arranged at the middle part of the base; stand columns are arranged on the outer side of the collecting box; support columns are arranged on the base on the outer side of the stand columns; a support block is connected to the stand columns through hinges; a knife groove is formed in the top of the support block; a screw hole is formed in the middle part of the support plate; guide plates are arranged under the support plate; a guide groove is formed in the inner side of each of the guide plates; connecting rods are arranged on the upper part of the cutting knife; the upper ends of the connecting rods are connected to the lower part of a limiting rod; a connecting piece is arranged at the upper part of the limiting rod; a threaded rod is connected to the upper part of the connecting piece; a rotating handle is arranged at the top of the threaded rod; and the connecting piece consists of a protective cover, a bearing, a rod head and a sealing ring. According to the device disclosed by the invention, the threaded rod can rotate up or down to drive the cutting knife to rise or fall and cut a wire rope, so that the force of an operator for cutting the wire rope is reduced, besides, the operating time is saved, and the cutting efficiency is improved.

The invention relates to the technical field of computer data line connector manufacturing, and discloses chip glue embedding auxiliary equipment for a data line connector. The chip glue embedding auxiliary equipment comprises a shell, a rotating shaft is movably connected to the interior of the shell, a gear is movably connected to the surface of the rotating shaft, a guide plate is movably connected to the surface of the gear, a colloid storage bag is movably connected into the guide plate, a telescopic rod is fixedly connected to the surface of the colloid storage bag, a colloid embedding ring is movably connected to the end, away from the colloid storage bag, of the telescopic rod, and a threaded pipe is movably connected into the colloid embedding ring. The gear is engaged and rotatedby the rotating shaft at the moment, so when a chip reaches the surface of a placing plate, a colloid in the colloid storage bag can also be extruded out by the telescopic rod which moves under the action of centrifugal force; and if the chip deviates leftwards or rightwards, the spring plate is extruded, so that the spring plate inclines to drive the adjusting wheel to be in contact with the chip and move the adjusting wheel to a proper position, and the effect of adjusting the position of the chip before glue embedding to enable the chip to be in a correct position is achieved.

The invention discloses an injection mold clamp with a material taking function, and belongs to the technical field of injection mold clamps. The injection mold clamp comprises a clamp body and a fixed mold, wherein the fixed mold is located at the top of the clamp body, the left side of the top of the clamp body is fixedly connected with a mounting frame, a first electric push rod is fixedly installed on the left side of the mounting frame, the right end of the first electric push rod penetrates through and extends into the mounting frame, a through groove is formed in the mounting frame, theright end of the first electric push rod is fixedly connected with a trapezoidal block, and the trapezoidal block is located in the through groove. According to the injection mold clamp, a limiting rod is arranged so that the moving direction of a floating plate can be limited, the floating plate is prevented from inclining in the moving process, an ejector rod moves upwards along with the floating plate, a sealing gasket is jacked up until a workpiece in the fixed mold is ejected out, the sealing gasket can enable the ejector rod and the fixed mold to be connected more tightly, injection molding raw materials are prevented from leaking, so that a user can take the materials conveniently, and the problem that a previous clamp does not have the material taking function is solved.

The invention discloses a car interior decoration coating device with a protective structure, and belongs to the field of coating machines. The car interior decoration coating device with the protective structure includes a coating machine main body, the top of the coating machine main body is fixedly provided with a hydraulic rod, the bottom of the hydraulic rod penetrates and extends to the inside of the coating machine main body, an upper mold is fixedly installed at the bottom of the hydraulic rod, a lower grinding tool is arranged inside the coating machine main body, the lower grinding tool is located below the upper mold, and a base is fixedly connected to the bottom of the lower grinding tool. According to the car interior decoration coating device, by rotating a positioning device, the positioning device is put down and is not in contact with the base any more, the base loses limitation to slide front and back in the coating machine main body through a sliding groove, and a user can move the lower grinding tool out from the lower portion of the upper mold; after the lower grinding tool is moved to a support slide plate, the user can conveniently load and unload workpieces;and hidden safety hazards do not exist in the operation process, and safety of the device is improved.

The invention relates to the technical field of building materials, and provides a novel anti-skid floor tile and a manufacturing method thereof. The novel anti-skid floor tile comprises a floor tile body, a cavity is formed in the floor tile body, a plurality of mounting holes communicating with the cavity are formed in the upper surface of the floor tile body, anti-skid mechanisms are slidably mounted in the mounting holes, and the upper ends of the anti-skid mechanisms protrude out of the upper surface of the floor tile body. A control mechanism is mounted in the cavity and comprises a balance rod, a supporting seat and first springs, the supporting seat is hinged to the middle of the balance rod, the upper surfaces of the two ends of the balance rod abut against the two different anti-skid mechanisms respectively, and the multiple first springs are symmetrically distributed on the two sides of the supporting seat, and are located between the lower surface of the balance rod and the bottom face of the cavity. According to the lever principle, the acting force applied by the tiptoe or the heel to one anti-skid mechanism is converted into the acting force applied by the other anti-skid mechanism to the heel or the tiptoe, the anti-skid performance is improved by increasing friction and limiting, and the cost is low.

The invention discloses an anaesthesia machine threaded pipe adjusting device for anesthesia department operation, and belongs to the technical field of threaded pipe adjusting devices. The anaesthesia machine threaded pipe adjusting device comprises a mounting plate, wherein the front surface of the mounting plate is in threaded connection with a threaded rod, and one end of the back surface of the threaded rod penetrates through and extends into the mounting plate and is rotatably connected with a connecting plate; two connecting rods are hinged to the back face of the connecting plate, anda guide rod is fixedly connected to the inner wall of the mounting plate. According to the device, when the third gear rotates, the clamping rod making contact with the third gear is stressed to moveupwards, the spring is stressed to contract, when the third gear rotates to the next tooth, the spring is not stressed any more and starts to reset, the clamping rod is clamped into the third gear again, after the threaded pipe is moved to the proper position, the rotating shaft can be stopped rotating, and the clamping rod clamps the third gear; and when the height needs to be adjusted, the rotating shaft needs to be rotated reversely after the left end of the clamping rod is pressed, so that the problems that an existing threaded pipe adjusting device does not rise and cannot adapt to threaded pipes of different thicknesses are solved.

The invention discloses a self-adaptation tensioner sprocket. The self-adaptation tensioner sprocket is used for solving the technical problems that in the prior art, a sprocket mechanism does not have the self-adaptation function, certain radial force to sprocket hobbing teeth constantly cannot be effectively ensured, the sprocket cannot independently solve impact and vibration until a chain pitch is increased, and tooth skipping is caused. The sprocket specifically comprises two sets of sprocket side plates, a middle wheel is mounted between two sets of sprocket side plates, multiple rotatable sprocket hobbing teeth are evenly arranged in the radial direction of the middle wheel and are elastically connected with the middle wheel, any one sprocket hobbing tooth can generate elastic force, the sprocket hobbing teeth move in the preset direction under the effect of elastic force, and make contact with corresponding two engaging teeth, a tooth-shaped chain is tensioned, the self-adaptation tensioner sprocket has the self-adaptation function, the impact and vibration caused during chain and sprocket engaging can be effectively reduced, and the probability of occurrence of the skipping phenomenon is reduced.

The invention discloses a handwriting board for a computer. The board comprises a machine body, a bearing groove is formed in one side of the machine body, an abutting mechanism is arranged in the bearing groove, two openings are formed in one end of the machine body, reset mechanisms are arranged in the openings, second rotating shafts are arranged on the reset mechanisms, the second rotating shafts are rotatably sleeved with fixing blocks, and a cross rod is jointly fixed to the two fixing blocks. According to the invention, the inclination degree of the panel can be adjusted according to the use requirements of a user; the adjusting range is wide, in addition, stable support can be realized after the adjustment is completed, stability of the machine body is ensured, the handwriting board is convenient for a user to stably perform writing operation, capable of well meeting the use requirements of different users, beneficial to improving the work efficiency, capable of well guaranteeing the panel and the handwriting pen when not in use, capable of effectively avoiding damage to the handwriting pen and the panel caused by collision and falling of foreign objects, and beneficial toprolonging the service life of the handwriting board.

The invention relates to a sewing machine presser foot device comprising a presser foot column rotationally arranged on the upper end of a machine base of the sewing machine. The presser foot column and a sewing part of the sewing machine are arranged on the same side and are far away from an operator; the top of the machine base is further provided with a driving mechanism driving the presser foot column to synchronously rotate with the sewing part; and the surface of the presser foot column is tangent to the surface of the machine base surface. During the use, a piece of cloth being sewed is pressed between the presser foot column and the machine base top, so a moving direction of the sewed cloth can be limited and the sewed cloth can be prevented from falling off the surface of the sewing base surface; and rotation of the cloth to be sewed can be avoided, so sewing effect can be ensured.

A resistance fuse protector with over-temperature protection relates to the technical field of resistors and comprises a casing, wherein uniformly distributed through holes are formed in the top and the bottom parts of the casing, and a movable cavity communicated with the inner sides of the through holes is arranged in the middle of the casing. According to the resistance fuse protector with theover-temperature protection function, through the cooperative use of a bimetallic strip and a plugging block II, when the temperature of a fusing resistor is too high, the gas in the movable cavity isthermally expanded, two piston rods move towards the top part and the bottom part respectively under the pressure action of the gas, and meanwhile, the bimetallic strip is heated to overturn towardsthe left side, electric contacts are no longer clamped with a conductive groove, so that the fusing resistor is disconnected, the whole circuit is disconnected, and when the temperature is further increased, the plug block II turns outwards under the action of air pressure to discharge redundant gas, so that the safety of the fuse is effectively protected, the safety of the circuit is further effectively protected, and the service life of the fuse is prolonged.