986 results about "Screw cap" patented technology

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 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.

According to the technical scheme, the automatic assembling machine is characterized in that the automatic assembling machine comprises a workbench, a positioning assembly, a flat gasket feeding assembly, a main body feeding assembly, a waterproof ring feeding assembly, a nut feeding assembly and a comprehensive assembly used for assembling and discharging nuts, and the positioning assembly comprises a rotary disc and a plurality of stations; the multiple stations comprise the flat gasket feeding station, the main body feeding station, the waterproof ring feeding station, the nut feeding station and the discharging station which correspond to the flat gasket feeding assembly, the main body feeding assembly, the waterproof ring feeding assembly, the nut feeding assembly and the comprehensive assembly correspondingly. The multiple stations are each provided with an outer cylinder, an inner cylinder elastically connected with the outer cylinder and a positioning rod with one end penetrating out of the inner cylinder and used for being connected with the main body shell in a sleeved mode, the outer diameter of the inner cylinder is matched with the inner diameter of the outer cylinder, one end of the inner cylinder is limited in the outer cylinder, and the end, used for being connected with the nut, of the main body shell can be partially inserted into the inner cylinder. The problems that in the prior art, procedures are numerous, and occupied space is large are solved.

The utility model discloses a wound stoma flushing device convenient for collecting waste liquid, relates to the technical field of medical instruments, and aims to solve the problems that the flushing force is not easy to adjust during wound stoma flushing and the waste liquid generated after flushing is not easy to collect. The output end of the small water pump is fixedly connected with a liquid outlet pipe, and the right outer wall of the liquid outlet pipe penetrates through the right outer wall of the mounting shell and fixedly communicates with a T-shaped hollow block. The screw cap is rotated to drive the screw rod to rotate, the wedge-shaped block extrudes the stress column, then the stress column pushes the blocking block to move upwards, the flow of cleaning liquid is controlled through the volume of the blocking block extending into the transverse section of the T-shaped hollow block, waste liquid generated after flushing flows into the conveying pipe through the drainage hole, and the cleaning effect is improved. The waste liquid is conveyed into the collecting tank through the conveying pipe to be collected, and the problems that the flushing force is not easy to adjust during wound stoma flushing and the waste liquid generated after flushing is not easy to collect are effectively solved.

A container with a screw cap is produced from a plastics material, by blow molding, and has a body with a first end and a second end, which is located opposite the first end, and with a lateral surface located therebetween, wherein a base with a standing surface is formed at the second end and an opening is formed at the first end, and wherein the opening is defined by a neck, which encloses the opening and is formed in one piece with the container, an external thread being formed on the neck, wherein the screw cap is provided with an internal thread which, when the screw cap has been placed in position, interacts with the external thread, and wherein a sealing element is formed on the inner side of the screw cap.

1. The name of the design product: the screw cap for fastening device (JS-public version). 2. The use of the design product: the product is applied to the fastening device of shoes, hats and clothing; the user can tighten the laces by rotating the product and through the fastening device, so as to tighten the articles through the tightened laces. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view.

The invention relates to the technical field of downhole tools, in particular to an oil-submerged pump rapid wiring device which comprises a wiring pipe, an electronic bin sealing shell, a sealing screw cap, a sealing gland, a wiring socket, a throwing-fishing socket leading-in main line and a small flat cable leading-out line. At least one left-right through wiring groove is formed in the outer side of the wiring pipe located on the outer side of the eccentric overflowing hole at intervals along the circumference, an electronic bin groove is formed in the outer side of the wiring pipe corresponding to the middle position of the wiring groove, and an electronic bin sealing shell is fixedly installed in the electronic bin groove. The device is reasonable and compact in structure and convenient to use, and by arranging the connector socket, a drop-and-pull socket leading-in main line and a small flat cable leading-out line are rapidly connected into the electronic bin sealing shell; the three lead-out holes are arranged on the sealing gland, so that each small flat cable lead-out wire is independently led out of the electronic cabin sealing shell, mutual winding is avoided, and the small flat cable lead-out device has the characteristics of stability, reliability and high efficiency.

1. The name of the design product: pneumatic and manual dual-purpose sleeve. 2. The use of the design product: used for matching with wrench to screw the sleeve including nut, nut, screw, eccentric wheel, bolt, screw. 3. The design points of the design product: in shape. 4. The picture or photo that best shows the design points: design 1 perspective view 1. 5. Design 1 is designated as the basic design.

A capped bamboo-joint screw includes a screw body with a set of threaded grooves and a set of unthreaded areas on its outer surface. An adapter post is connected to the left side of the screw body, and a nut is connected to the left side of the adapter post. This device utilizes the alternating distribution of threaded grooves and unthreaded areas. When adjusting the screw length, the user can use pipe wrenches or wire cutters to clamp the unthreaded area and precisely cut it off along a preset break point. The threaded grooves remain intact after cutting, not affecting subsequent threaded connections with nuts or installation components, greatly expanding the length adaptability range and reducing the need for stock specifications. Simultaneously, the Phillips head groove on the left side of the nut, in conjunction with the adapter post, ensures that torque is effectively transmitted to the threaded section when tightening the screw with tools, enhancing installation stability. Furthermore, the integrated metal cap design makes this product aesthetically pleasing and provides excellent protection.

The utility model relates to the technical field of fabric splicing, and disclose a kind of anti-deviation compression mechanism of fiber fabric splicing forming, including presser bar seat, the top of presser bar seat is provided with presser bar main body, the top of presser bar seat is provided with workbench, the side of workbench is provided with anti-deviation compression assembly, the utility model is provided with anti-deviation compression assembly on presser bar seat, wherein the compression of anti-deviation compression assembly Resisting contact board is rotatably arranged on the top of limiting sliding block by rotating connecting shaft, and limiting sliding block is slidably inserted in limiting sliding slot, so that the position adjustment of compression Resisting contact board on the top of workbench is more convenient, the two sides of rotating connecting plate are fixed by fastening screw cap on fastening screw rod, effectively prevent the possibility of fiber fabric from deviating during splicing, so that fabric heat bonding is more stable, and the device can quickly complete the compression of fabric splicing, meet the processing needs of user.

1. Name of this design product: Flat fork guard plate screw cover. 2. Purpose of this design: To cover the screw holes on the flat fork plate of an electric bicycle, providing a tight fit and protection for the screws. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: a 3D model.

This utility model relates to the field of curtain wall installation technology, and in particular to an adjustable support for a steel structure of a building curtain wall, including a support, a support tube, and a screw cap. A support tube is fixedly connected to one side of the support, and a screw cap is fixedly connected to one end of the support tube. The support tube includes a support tube body, an inflatable anti-slip device inserted into the inner side of the support tube body, a partition fixedly connected to the inner side of the support tube body, an air inlet at one end of the support tube body, and a support rod fixedly connected to the outer side of the support tube body. A threaded groove is provided on the inner side of the support tube body. The inflatable anti-slip device includes a solid base, an inflation port on the outer side of the solid base, and an air supply strip hole inside the solid base. In this utility model, through the inflatable anti-slip device and the insertion bolt, it is possible to reinforce the minor pits between curtain walls while fixing the curtain wall installation, filling the gaps at the edges of the curtain wall panels while maintaining the stability of the curtain wall.

The utility model provides an improved shower faucet angle valve, angle valve body outer wall extends and is equipped with the water passing part, and the water passing part is formed with the water passing channel, and the water passing part includes the first end fixed connection with angle valve body and the second end away from angle valve body, and the second end is detachably connected with the joint part, the recess is equipped with in the circumferential direction in the water passing part outer wall middle part, the joint part includes the nut, the reverse screw and is used for locking the first bolt of nut in the recess, the reverse screw is installed in the nut inside and is connected with the water passing part, and the nut is equipped with the through hole along the radial direction, and the first bolt is installed in the through hole. Breakthrough with the joint part and the water passing part's connection point is improved from the single point connection of the reverse screw and the water passing part to the double point connection of the nut, the reverse screw and the water passing part, realizes the breakthrough in stability, life, cost three dimensions, and has the innovation and the industrial practicability.

The utility model discloses a portable volatile organic compound detector. The portable volatile organic compound detector comprises a detector body and a detection assembly, one end of the detector body is provided with a mounting groove, a groove opening of the mounting groove is provided with a threaded flange, and the threaded flange is provided with a threaded cover; the detection assembly can be accommodated in the mounting groove, and the detection assembly comprises a telescopic rod, a detection head, a corrugated pipe and a spring. During use, the threaded cover is taken down, the elastic force of the spring ejects the detection head and part of the telescopic rod out of the mounting groove, at the moment, a detector applies tension to the telescopic rod to enable the telescopic rod to extend, and the corrugated pipe located in the telescopic rod extends along with the telescopic rod; and then, the detection head can extend into the to-be-detected area for detection, so that the safety of detection personnel is improved. When the portable volatile organic compound detector disclosed by the utility model is not used (or carried), the detection component can be accommodated in the mounting groove, so that the portability of the volatile organic compound detector is effectively improved.

The utility model relates to a mobile phone support structure capable of rotating a screen, which is characterized in that a supporting seat is fixedly connected with a support fixing mechanism, a connecting block is fixedly connected with a screen fixing mechanism, the end surface of the supporting seat is provided with a groove matched with a universal ball, a threaded cover is in threaded connection with the end part of the supporting seat, and the end surface of the threaded cover is provided with a through hole; the connecting block penetrates through the through hole and is fixedly connected with the universal ball, a limiting ring is arranged in the threaded cover, the universal ball is rotationally arranged in the limiting ring, the inner diameter of the two ends of the limiting ring is smaller than that of the middle section, the limiting ring can slide in the axial direction of the threaded cover, and a damping elastic component is fixedly arranged at the end of the limiting ring. The other end of the damping elastic component is fixedly connected with the inner wall of the threaded cover. The limiting ring is pushed by the damping elastic component to abut against the universal ball, so that the universal ball is in close contact with the inner wall of the groove, vibration of a vehicle body is prevented from being transmitted to the universal ball, and looseness is avoided; the resistance cushion layer is arranged on the inner wall of the groove, friction force is increased, and therefore the universal ball is further prevented from rotating.

A screw cap for a container. The cap comprises an inner member having an annular sidewall with an internal screw thread for screwing the cap onto a threaded opening of a container; and an outer member having a skirt enclosing the sidewall of the inner member, the outer member being coupled to the inner member to prevent displacement of the outer member relative to the inner member parallel to an axis defined by the screw thread. The cap has a first configuration in which the outer member is rotatable with respect to the inner member to prevent the cap from being unscrewed and a second configuration in which the skirt engages with the sidewall of the inner member so that the cap can be unscrewed by rotating the outer member.

The application belongs to the technical field of fine filter of natural gas treatment methanol recovery device, and particularly discloses a filter core extractor and method for methanol recovery device. The filter core extractor comprises a lever, a fixing hole is formed in the side wall of one end of the lever, a plurality of transposition holes are formed in the side wall of the middle part of the lever, a fixing structure is arranged at the fixing hole and used for fixing with the cylinder wall of the methanol recovery device, and a taking-out structure is arranged at the transposition hole. The taking-out structure comprises a buckle taking-out assembly, a cavity is formed in the middle part of the buckle taking-out assembly, a third through hole is formed below the cavity, a buckle taking-out ring is fixedly arranged in the third through hole, and the buckle taking-out ring is a circular sheet with a groove formed along the radial direction. The filter core screw cap is clamped by the cavity, the filter core screw rod is clamped by the groove in the buckle taking-out ring, so that the filter core is fixed, the fixing structure plays the role of fulcrum, the filter core is lifted and replaced by the lever, the filter core is not bumped during use, and the integrity of the filter core is ensured.

The utility model belongs to the technical field of steel truss installation, and particularly relates to a steel truss trestle installation device which comprises an electric installer body, a driving rod is installed at the output end of the electric installer body, a sleeve is connected to the side wall of the driving rod in a sliding mode, and a fixing ring is fixedly connected to the side wall of the driving rod. A first spring is installed between the fixing ring and the sleeve, the first spring is arranged on the outer side of the driving rod in a sleeving mode, and an installation support is installed at the top end of the electric installer body. Through cooperative use of the driving rod and the sleeve, the coverage range of the screw cap is wider, the phenomenon that the sleeve is loosened is reduced, the continuity of installation operation is effectively guaranteed, the situation of interruption is reduced, and the operation efficiency is improved; through cooperative use of the mounting support, the side bracket and the auxiliary stop lever, the auxiliary stop lever is limited by one or more structural points of the steel truss, so that the auxiliary stop lever and the side bracket can assist in limiting the electric installer main body.

The utility model discloses a high-strength check bolt, which belongs to the technical field of bolts and comprises a main screw, the lower surface of the main screw is in threaded connection with a limiting component, the outer surface of the main screw is in threaded connection with a fastening nut, two sides of the outer surface of the fastening nut are fixedly connected with extension plates, and the lower surface of each extension plate is provided with a circular groove. A connecting assembly is inserted into the circular groove; the limiting assembly comprises an auxiliary screw, and the outer surface of the auxiliary screw is in threaded connection with the lower surface of the main screw. By means of the limiting assembly and the connecting assembly, the connecting plate and the extending plate can be connected through the threaded rod, due to the fact that the thread parameters of the main screw and the auxiliary screw are different, the auxiliary screw and the fastening nut are matched with each other after being tightened and generate the clamping stagnation effect, and therefore the main screw and the fastening nut are effectively prevented from automatically rotating in the continuous vibration process; and therefore, the overall stability of connection is improved, the anti-loosening performance is enhanced, and the safety and reliability of the connection part under the complex working condition are further guaranteed.

The utility model relates to the technical field of food mixers and discloses a cutter-adjustable food mixer which comprises a control bin, a threaded cover is fixedly connected to the bottom of the control bin, a mixing bin is in threaded connection to the bottom of the threaded cover, a supporting plate is fixedly connected to the surface, close to the top, of the inner side of the control bin, and an adjusting assembly is installed on the top of the supporting plate. A control assembly is installed between the supporting plate and the threaded cover, a stirring assembly is installed on the inner side of the control assembly, the control assembly comprises a screw movably connected to the bottom of the supporting plate in a sleeving mode, the bottom of the screw is fixedly connected with a stainless steel bearing in a sleeving mode, and the bottom of the stainless steel bearing is fixedly connected with the top of the threaded cover. By arranging the adjusting assembly, the control assembly and the stirring assembly, the problems that in the prior art, food is too much, and when a stirring bin is closed, a rotating rod and a stirring tool bit cannot be placed into the stirring bin are solved, and meanwhile through extrusion of hard food materials, the stirring efficiency is improved.

The invention discloses a forming process of a paper-based screw cap, and belongs to the technical field of environment-friendly package manufacturing. Aiming at the defects of large pattern alignment deviation, easiness in springback and layering of the structure and high production cost of the existing paper-based screw cap, the process comprises the core steps of preprinting a sheet to prepare an alignment reference mark, performing die cutting to obtain a blank with a physical positioning point, performing winding interlocking, performing hydraulic densification crosslinking, performing phase matching forming on a fixed plate, preparing a hydrophobic lubricating film, and performing assembly inspection. Wherein the alignment reference mark, the physical positioning point and the spiral starting point of the positioning groove form geometric linkage, and the phase deviation between the finished product pattern and the spiral starting point is smaller than or equal to 0.5 degree. The process yield reaches 90% or above, a finished product is free of clamping stagnation and paper powder falling during screwing, and the method can adapt to containers made of multiple materials and is suitable for environment-friendly packaging scenes such as daily chemicals, cosmetics and food.

The utility model discloses a kind of even feeding devices of ball press, including ball press body, motor and sprocket mechanism, the both sides of ball press body upper surface are respectively fixed with support seat, and the upper end surface of support seat is fixedly provided with positioning column, and the outer wall of positioning column is equipped with support plate, and the outer wall of positioning column above support plate is movably installed with screw cap, the side outer wall of the upper end of blanking pipe is fixedly provided with support frame, and the end surface of support frame is installed with motor, and the inner wall of blanking pipe below support frame is movably connected with transmission sleeve, the inner wall of transmission sleeve is movably installed with square column, and square column is fixedly arranged on the end surface of dispersion rod, and the outer wall of dispersion rod is fixedly connected with dispersion branch rod, and the inner wall of blanking pipe of dispersion rod side is provided with limiting mechanism. The even feeding device of ball press is convenient to replace dispersion structure, so as to ensure the use stability of ball press.

The utility model provides a three-blade curved surface axial flow type impeller. The three-blade curved surface axial flow type impeller comprises a hub, a mounting plate and blades, an inner cavity of the hub is provided with an internal thread; the mounting plates are uniformly distributed along the periphery of the hub, the mounting plates are provided with locking pieces, and the blades are connected with the mounting plates through the locking pieces; the blade wing is connected with the hub through the mounting plate, the attack angle of the blade wing is alpha, and the torsion angle of the blade wing is Beta. According to the utility model, the hub, the mounting plate, the locking piece, the screw rod, the screw cap, the blade wing and the like are matched for use, and the blade wing and the mounting plate are connected through the locking piece, so that the blade wing and the mounting plate are connected through the screw rod and the screw cap; the design that the three blades are matched with the mounting plate and the hub is changed into an axial flow type impeller, so that the shearing force of the blades in the using process is weakened, the output performance of axial flow is enhanced, and the energy-saving effect is achieved by reducing the dynamic coefficient of the whole mechanism during rotation.

1. Name of the product in this design: Inner cover (screw cap). 2. Purpose of this design: Bottle cap for sealing. 3. The key design feature of this product is its shape. 4. The picture or photo that best illustrates the key design points: Design 1 3D diagram 1. 5. Design 1 is designated as the basic design.

The utility model relates to the technical field of water purifier descaling, and discloses an efficient descaling water purifier which comprises a water purifier shell, filter bottles, a threaded cover, a threaded groove and filter elements, the inner wall of the water purifier shell is fixedly connected with five groups of filter bottles, the tops of the five groups of filter bottles penetrate through the top of the water purifier shell, and the inner walls of the five groups of filter bottles are provided with the filter elements. Threaded grooves are formed in the outer sides of the tops of the five sets of filter bottles, threaded covers are in threaded connection with the outer sides of the threaded grooves, when a traditional water purifier needs to be used for descaling, a user often needs to search and carry a descaling agent by himself, time and labor are consumed, and the descaling effect is possibly affected due to the fact that the variety or the dosage of the descaling agent is improper. And according to the design, the storage structure is integrated at the top of the threaded cover and specially used for storing the descaling agent, so that the descaling agent can be taken at any time, and the preparation work before descaling is greatly simplified.

The invention relates to the technical field of fasteners, and discloses a waterproof rivet nut which comprises a nut body, a waterproof mechanism is connected to the outer wall of the nut body, a fixing mechanism is mounted at a port of the nut body, an internal thread is formed in the inner wall of the nut body, a sealing gasket and a waterproof belt are connected to the upper portion of the internal thread, and the waterproof mechanism comprises sealant, a waterproof strip and a sealing ring. The sealing glue is adhered and fixed to the nut connector, the waterproof strips are arranged on the outer wall of the nut in an up-down staggered mode, the fixing mechanism comprises a fixing ring, external threads and fixing strips, the fixing strips are arranged in gaps formed by the external threads and the fixing ring in a penetrating mode, and the tops of the external threads are covered with gaskets. By means of the multi-layer sealing structure of the waterproof mechanism and hollow filling of the waterproof belt, the problem that a water source is prone to permeating and leaking is effectively solved, the fixing strips in the fixing mechanism are extruded to expand outwards, and the clamping strength and the structural stability between the nut and the connecting piece are remarkably enhanced.

The utility model provides a kind of shock-absorbing oil cylinder, belong to oil cylinder field, it is by oil cylinder body, screw cap, piston mechanism, damping mechanism, sealing mechanism, reinforcing mechanism and hinged mechanism constitute, locking ring and limit ring cooperation in the scheme can be fixed in piston ring on piston rod, locking ring is simultaneously detached from piston rod, so that piston ring can also be detached from piston rod, so that piston ring can be replaced, since piston ring is slidably connected in oil cylinder body, so that piston ring can be removed from oil cylinder body, shock-absorbing bump and shock absorber collision can be damped, prevent piston rod contraction movement and the bottom of oil cylinder body collision, to realize the damping of piston rod, the recess is used for connecting sealing ring, by sealing ring is clamped in recess, can improve the sealing property of oil cylinder body and screw cap connection, to prevent oil leakage in the interior of oil cylinder body.

The utility model relates to the technical field of gate valves, in particular to a hard sealing gate valve which comprises a valve body, a valve handle seat arranged on the valve body and a valve handle arranged on the valve body, an anti-rust assembly is arranged on the valve handle seat, and the anti-rust assembly comprises an oil storage cylinder fixedly installed on the upper surface of the valve handle seat. A limiting disc is fixedly installed on a top barrel body of the oil storage barrel, a dustproof cover is hinged to the side face of the limiting disc through a hinge, a threaded pipe is fixedly installed on a bottom barrel body of the oil storage barrel, a threaded cover is connected to the threaded pipe in a threaded mode, and a transparent window is arranged on the barrel body of the oil storage barrel. An arc-shaped plate is fixedly installed on a cylinder body of the oil storage cylinder, a left guide rod and a right guide rod are fixedly installed between the arc-shaped plate and the bottom face of the limiting disc, and a light-proof shielding plate is slidably connected to the two guide rods. The valve handle can be prevented from rusting, normal operation is facilitated, and use is convenient.

The utility model relates to the technical field of plastic reels, in particular to a plastic reel convenient to splice, which comprises a rotating rod, a sleeving side plate, storage rings and a shaft rod mounting sleeve, the outer side of the shaft rod mounting sleeve is connected with the storage rings at equal intervals through radial reinforcing supports, and integrally formed fixing sleeves are arranged on two sides of the shaft rod mounting sleeve. The portions, tightly attached to the storage ring, of the fixing sleeve are each sleeved with a sleeving side plate, and mounting screws are arranged on the outer sides of the sleeving side plates at equal intervals along the shaft hole. One end of a rotating rod is sleeved with the shaft rod mounting sleeve and the fixing sleeve, a hexagonal pressing nut is screwed to one end of the rotating rod, a connecting shaft sleeve is welded to the other end of the rotating rod, and a positioning pressing plate is welded to the middle of the rotating rod in a sleeving mode; the plastic reel is convenient to splice quickly, convenient to operate and convenient to connect with the output shaft of the motor for use, so that the motor drives the reel to rotate.

The utility model relates to the technical field of paper slitting, in particular to a slitting mechanism for thick paperboard production, which comprises a fixing plate, a driving motor arranged on the outward side of the right side of the fixing plate, a material receiving table arranged in the middle of the fixing plate, a base arranged at the bottom of the fixing plate, and a cylindrical material cutting pad fixed in the middle of the fixing plate. A groove is formed in the position, corresponding to the knife edge, of the middle of the cylindrical cutting pad, a locking rotating ring is arranged on the outer ring of the connecting block, the locking rotating ring is connected with a nut arranged in the locking rotating ring through a connecting rod, the nut sleeves the threaded column, an unlocking switch is arranged on the right side of the connecting block, the interior of the unlocking switch is connected with a tilting rod, and an elastic gasket is connected with a locking block; threaded holes are formed in the right sides of the blades; the device has the beneficial effects that the blades can be connected step by step by arranging the connecting block, fixation is formed by arranging the threaded column and the threaded hole in the device, and locking and positioning are further conducted by arranging the locking block and the fool-proof opening on the opposite side.