180results about How to "No disengagement" patented technology

The present invention provides a heat-resistant light-shielding sheet, its manufacturing method, and an aperture or light amount adjusting device using the same. Used for optical instrument parts such as the aperture blades of the aperture device for adjustment, and has excellent light resistance, heat resistance, sliding properties, low gloss, and electrical conductivity. The heat-resistant light-shielding sheet is characterized by comprising a resin sheet substrate (A) having a heat resistance of 200° C. or higher, and Ni with a thickness of 50 nm or more formed by sputtering on one or both surfaces of the resin sheet substrate (A). The metalloid film (B), the Ni-based oxide film (C) with low reflectivity formed by sputtering on the Ni-based metal film (B), and the surface roughness is 0.1-0.7 μm (arithmetic mean height Ra).

The invention provides a traverse control technology, capable of preventing the deviation and broken line of a wire rod in advance with the bigger change of the wire rod reeling spacing. A traverse device (1), reels the wire rod (3) of a reel (4) for a linear saw (2) on a traverse roller (5) and a tension roller (14), when the traverse roller (5) is the reciprocating motion along the axial direction of the reel (4), the target position of the wire rod (3) is in the right-angle direction relative to the axial direction of the reel (4) between the reel (4) and the traverse roller (5), the reference force (F1) of the wire rod (3) is detected at the tensioning roller (14), the variation force (F2) based on the displacement of the wire rod (3) deviated from the target position is detected at the traverse roller (5), based on the variation of the difference (delta F) of the reference force (F1) and the variation force (F2), the reciprocating speed (V) of the traverse roller (5) is controlled.

The invention discloses hydraulic artificial muscle comprising a closed end connector, an elastic rubber tube, a high-strength fiber woven mesh, a water end connector, two end fastener rings, two middle fastener rings and two inverted-taper-tooth-surface fastener rings. When the hydraulic artificial muscle operates, the elastic rubber tube and the high-strength fiber woven mesh deform under the hydraulic action, the diameter of the hydraulic artificial muscle increases with the increased length, and a drive object connected to a threaded blond hole of the closed end connector is pulled. The elastic rubber tube closes water of certain pressure inside. The high-strength fiber woven mesh is in a tubular shape tightly woven with high-strength fibers and covers the outside of the elastic rubber tube, and accordingly the hydraulic artificial muscle can bear sufficient inner hydraulic pressure. Under the fastening action of the fastener rings and the structural action of the inverted-taper-tooth-surface and the shoulders, the hydraulic artificial muscle can bear large pull load, thus the high-strength hydraulic artificial is formed.

The invention relates to a safe scalpel with an assembled steel handle, comprising a guarded scalpel assembly and the steel handle, wherein the guarded scalpel assembly comprises a scalpel blade, a scalpel loading body, a scalpel sleeve and a safety latch, the scalpel blade is fixed in the front of the scalpel loading body, the scalpel sleeve is sleeved on the scalpel loading body in a sliding mode, and the safety latch is connected to the scalpel loading body in a sliding mode. Before the scalpel is used, the guarded scalpel assembly is firstly inserted into the steel handle and is connectedwith a tache by an inserting structure, then, a button arranged on the scalpel sleeve is pressed by a thumb to pull the scalpel sleeve from a first valve to the end backwards and is locked to a secondvalve, the safety latch is driven by the scalpel sleeve and inserted into a groove of the steel handle, so a tache connecting structure is in a protection state and can not be separated, and the scalpel blade can be exposed to use at the moment. In order to prevent the damage of medical personnel by the scalpel blade in an operation process, the scalpel sleeve is pushed to the first valve by pressing the button. After safe scalpel with the assembled steel handle is used, the scalpel sleeve is pushed to a death valve forwards by pressing the button, the safety latch retreats from the groove inorder to relieve protection simultaneously, and the guarded scalpel body assembly can be disassembled by pressing the button on the steel handle. Because the guarded scalpel assembly can not be usedagain after being self-locked, the safe scalpel with the assembled steel handle thoroughly eliminates the potential safety hazards of the prior scalpel with a steel handle.

The invention relates to a chemical deposition preparation method of a piezoelectric composite metal electrode. The chemical deposition preparation method particularly aims at a PZT ceramic and polymer coexisting composite material and comprises the following preparation steps: preparing a piezoelectric composite, cleaning, removing oil, wetting, carrying out primary coarsening, reducing, carrying out secondary coarsening, activating a colloid target, peptizing, carrying out chemical plating and passivating. According to the chemical deposition preparation method, a metal coating chemically deposited on the surface of the piezoelectric composite has a bright surface, is fine in crystallization, can uniformly cover the surfaces of ceramics and polymers and has good binding force with the ceramics and polymers. An adopted medium and low temperature technology is capable of ensuring that the piezoelectric composite metal electrode is free of deformation and material separation. The chemical deposition preparation method does not need expensive equipment and is low in cost and suitable for large scale production.

The invention belongs to the technical field of vehicle exhaust purification, and specifically relates to a method for applying soldering fluxes to metal corrugated ribbons and a device for implementing the method, wherein the metal corrugated ribbons to which the soldering fluxes are applied are preferably used for manufacturing metal honeycomb carriers for vehicle exhaust purifiers. The device for applying soldering fluxes to metal corrugated ribbons comprises a feeding device of metal corrugated ribbons, a soldering flux application unit for positioning the metal corrugated ribbons so as to carry out soldering flux application, and a gas cooling device or a heated-air drying device for solidifying the soldering fluxes. The method for applying soldering fluxes to metal corrugated ribbons is implemented mainly through the following step: applying soldering flux powder or a mixture consisting of the soldering flux powder and a binding agent to the metal corrugated ribbons by using the soldering flux application unit so as to form soldering fluxes solidified on or adhered to the wave crests or troughs of the metal corrugated ribbons. By using the method and device provided by the invention, the defects in the prior art, that the soldering fluxes are easy to fall off in the process of soldering flux application and the application strength of the prepared product is not enough, are overcome.

Disclosed are tread rubber materials for making meridian aircraft tire belt layer cord threads with aramid fiber threads. The rubber materials are prepared according to a certain ratio with 1# smoke sheet rubber as main rubber materials and butadiene styrene rubber, resorcinol bonding resin, formaldehyde bonding resin, a bonding promoter AIR-201 special for the aramid fiber threads, a bonding promoter AIR-1, highly-abrasion-resistant carbon black, precipitated silica, a novel silane coupling agent, insoluble sulfur and a sulfenamide accelerator as main auxiliary materials. The rubber materials have the performance advantages that the bonding strength of the rubber materials and the aramid fiber threads is high, and the bonding retention rate after thermal ageing is high and have the performance characteristics of being high in tensile strength and tearing strength, low in compression fatigue heat generation and high in definite elongation stress. The rubber materials are used as aircraft meridian tire belt layer tread rubber, thus under the high-load and high-speed severe usage conditions, the quality problems of rubber thread loosening or delaminating of layers do not occur to the belt layer position of the aircraft tire, the rubber threads are bonded firmly, and the tire is safe to use.

The invention relates to a self-adaptive drive device of a trackless sliding door and a door with the device. The self-adaptive drive device comprises a base; a motor; a drive shaft, wherein one end of the drive shaft is synchronously connected with a motor rotating shaft in a chain drive, belt drive or engagement manner, and the other end of the drive shaft is synchronously connected with a driven gear; a movable frame, wherein the movable frame has a degree of freedom of movement relative to the base in a plane perpendicular to the rotating axis of the drive shaft, and a guide part above the driven gear is arranged on the movable frame; a gear rack, wherein the gear rack is arranged between the driven gear and the guide part, teeth on the lower surface of the gear rack are engaged with the driven gear and the upper surface of the gear rack is in sliding, rolling or engagement fit with the guide part; a guide mechanism. The self-adaptive drive device of the trackless sliding door and the door with the device have the advantages that the door body can be enabled to automatically adapt to low or uneven parts of the ground and the phenomenon that the drive device is separated or gets stuck during transverse movement of the door body is avoided.

The invention discloses a magnetoelectricity type micro generator which comprises a micro generator body and a power source. The micro generator body is a disc type permanent magnet micro generator. The power source is a wind turbine. The magnetoelectricity type micro generator obtains energy by the fact that the turbine converts wind energy, rotating mechanical energy is converted to electricity energy through the disc type permanent magnet micro generator, and the magnetoelectricity type micro generator is a high-power-energy-density micro energy device. A magnet in a rotor is an integral type axial multipole annular magnet machined with axial multipole magnetizing technology, the magnet and a magnet yoke are fixedly combined into a whole, and meanwhile a single-phase concentric type winding plane coil is used as a stator, and the coil is arranged in a floating mode. The magnetoelectricity type micro generator has the advantages of being simple in structure, small in size, large in power density, good in output voltage waveform (sine wave) and low in starting wind speed.

The invention relates to a horizontal movement type continuous electrolytic method of lead in a regenerative lead-containing material and the method uses the lead-containing paste in waste lead acid storage batteries and the lead-containing paste generated in the production process of the lead acid storage batteries as raw material to perform electrolytic regeneration. In the electrolytic process, alkaline electrolyte is used, a cathode and an anode are arranged in a horizontal manner, the lead-containing paste to be treated is filled in a cathode disk to perform continuous horizontal movements; and the lead-containing paste is reduced to obtain lead and realize the continuous electrolytic regeneration of lead. The invention also provides a horizontal movement type continuous electrolytic device of lead in the regenerative lead-containing material. By adopting the method and device of the invention, the continuous production can be realized, the gas lock effect can be avoided or greatly reduced, the current distribution of the cathode and the anode can be improved, the cell voltage can be improved and the production efficiency can be effectively increased.

The invention discloses an implantable bionic flexible pulsatile pump driven by an ultrasonic motor. The pump comprises the ultrasonic motor, a groove cam, a roller follower, a slide block, an arc push plate, an elastic blood bag, a pump housing, a round separating plate and a linear guideway. According to The implantable bionic flexible pulsatile pump driven by the ultrasonic motor, the damage of blood pump to blood can be reduced effectively, the mounting location of the implantable bionic flexible pulsatile pump is not limited; the whole structure is compact, so that the volume of the pulsatile pump can be reduced effectively; and the implantability is added, so that the range of application suitable for the crowd is expanded.

The invention discloses a voice coil diaphragm integrated structure and a manufacturing method thereof. The voice coil diaphragm integrated structure comprises a main body and a spherical top, wherein the main body comprises an annular diaphragm part and a tubular voice coil part; and the spherical top is fixed on the outer surface of the annular diaphragm part and covers the outer end opening of the tubular voice coil part. The inner annular edge of the inner surface of the annular diaphragm part integratedly extends inwardly to form the tubular voice coil, a first leading line formed and etched on the outer surface of the annular diaphragm part is matched, a second leading line is formed and etched on the inner surface of the annular diaphragm part, a first voice coil line is etched and formed on the inner surface of the tubular voice coil part, and a second voice coil line is etched and formed on the outer surface of the tubular voice coil part. A traditional split assembly mode is replaced, the voice coil and the diaphragm are firmly combined together, a break-off phenomenon does not happen, the quality of the product can be effectively ensured, the assembly difficulty of the product is greatly reduced, and the production efficiency of the product is improved.

The invention relates to zirconia coating on the aluminum alloy surface and a preparation method thereof, which belongs to the technical field of coating materials. The invention adopts a plasma electrolytic oxidation method to control the components of electrolytic solution comprising 1-100g / L of zirconia or zirconium hydroxide and 1-5g / L of soluble hydroxides. The prepared zirconia coating consists of tetragonal zirconia, monocline zirconia and gamma type alumina. The host crystalline phase is the tetragonal zirconia; and the thickness of the coating is 20 to 300 micrometers. The coating is suitable for processing the surface of a part with a more complex construction, and has high strength of bonding with a substrate and high hardness reaching 1,700 to 1,800HV.

The invention discloses electrical equipment with a protection function, and belongs to the technical field of electrical equipment. The electrical equipment comprises an electrical cabinet, a top plate is arranged over the electrical cabinet; two first fixing blocks are fixedly connected to the upper surface of the inner wall of the top plate, the front faces of the first fixing blocks are movably connected with the top ends of connecting rods through pin shafts, the bottom ends of the connecting rods are movably connected with the front faces of second fixing blocks through pin shafts, and the lower surfaces of the second fixing blocks are fixedly connected with the upper surface of a sliding assembly. According to the electrical equipment with the protection function, the electrical cabinet, the top plate, the connecting rods, the sliding blocks, springs and sliding grooves are arranged, so that the top plate drives the two sliding blocks to be away from each other through the two connecting rods, and then the elastic force of the two springs can support the two sliding blocks, thereby effectively playing a role in buffering, preventing the electrical cabinet from being greatlydamaged due to smashing of a heavy object, protecting the electrical cabinet to a certain extent, and being not liable to affect the normal operation of the electrical cabinet.

The invention provides a dual-tooth-head spiral zipper. The dual-tooth-head spiral zipper comprises a pair of zipper tapes, wherein a plurality of zipper teeth are fixedly arranged on side edges, which are oppositely arranged, of the two zipper tapes. The dual-tooth-head spiral zipper is characterized in that each zipper tooth comprises a first branch tooth and a second branch tooth which are symmetrical in shape, the front parts of the two branch teeth respectively and obliquely extend towards the two sides of the height direction of the branch teeth, a clearance is arranged between the front parts of the two branch teeth, engaging grooves which extend along the height direction of the branch teeth are arranged on engaging parts of the branch teeth, and the two branch teeth of the same zipper tooth are respectively overlapped and engaged with adjacent branch teeth of the zipper teeth on the other zipper tape on the two sides of the zipper tooth; on the projection of the cross section of the zipper tapes, the lower part of the first branch tooth and the upper part of the second branch tooth are overlapped, and the two branch teeth are provided with clamping grooves at the overlapped part. The dual-tooth-head spiral zipper has the advantages that the zipper teeth are engaged stably and firmly, the anti-disengaging performance is high, the adjacent zipper teeth are not resisted and disengaged from each other even though the zipper is bent, and the appearance quality is excellent.

The invention discloses a temperature-resistant laminated steel pre-coating film adhesive and a preparation method thereof. The adhesive is formed by mixing a main agent and a curing agent in a mass ratio of (40-60) to1, wherein the main agent is an ethyl acetate solution containing polyester resin, epoxy resin, amino resin and a silane coupling agent; the rotary viscosity of the main agent at the temperature of 25 DEG C is 200-400mPa s, and the solid content is 25-35%; the hydroxyl value of the polyester resin contained in the main agent is 6-11mg KOH / g, and the softening point is 90-110 DEG C; the curing agent is an ethyl acetate solution containing an isocyanate prepolymer, the rotary viscosity of the curing agent at the temperature of 25 DEG C is 1000-3000mPa s, and the solid content is 73-77%. The wound pre-coating film avoids after-tack, a laminated steel product adopting the pre-coating film achieves the effect of no edge warping in case of cup drawing for 9mm, does not delaminate after 10J impact, resists salt fog so as not to bubble after 240h, particularly does not delaminate even if being boiled in water for 1h after the impact, and resists the temperature of 120 DEG C for 10min after the impact so as not to delaminate. The application requirements of laminated steel are met.

The invention relates to an integrated cooker and discloses a novel integrated cooker. The novel integrated cooker is used for solving the problems that cooking benches are easily inclined and collapsed due to oil stains on the ground and cookware is not clamped stably for owners of small houses or apartments narrow and small in space. The novel integrated cooker comprises a cooking bench, a table board, a gas stove assembly located on the table board, a range hood, a smoke baffle used for being connected to the range hood and the table board and a bracket assembly used for supporting the cooking bench. The bracket assembly comprises vertical supporting rods located on the four corners of the cooking bench and bracket supporting legs located on the bottoms of the vertical supporting rods, and the bracket supporting legs comprise trapezoid contact parts and cylindrical connection parts located on the trapezoid contact parts. According to the invention, the unique trapezoid contact parts are adopted for the bracket supporting legs, and the rigid demands of the owners of the small houses or the apartments can be met better.

The invention relates to a steel-concrete combined beam plate structure for a small bridge culvert, and belongs to the technical field of bridge engineering. The structure solves the problems that the connection of the existing bridge beam is complex and the sliding is easy to generate between concrete and a steel bridge faceplate. The structure adopts the technical schemes: the structure comprises a connecting seat, and a steel-concrete combined bridge culvert faceplate of which both ends are arranged above the connecting seat, wherein the structure of the steel-concrete combined bridge culvert faceplate comprises a steel bridge faceplate, more than two sets of U-shaped ribs which are arranged below the steel bridge faceplate in parallel along the axial direction; grooves matched with the U-shaped ribs are formed in the connecting seat. The structure has the beneficial effects that the steel-concrete combined bridge culvert faceplate is adopted, the grooves matched with the U-shaped ribs are formed in the connecting seat, so that the structure is simple, the weight is light, the mounting is convenient, and the mechanical property is good; the phenomenon of sliding or disengagement between the concrete and the steel bridge faceplate of a grid structure formed by steel nets and the steel bridge faceplate cannot be generated, so that the structure is particularly suitable for small bridge beams; anchoring holes which are connected with a bridge abutment or a cover beam are formed in the connecting seat, so that the positioning and the connection are convenient and fast, and the bridge culvert faceplate can be prevented from sliding to the ground.

The invention provides an injection-molding-grade nylon 6 composite material which comprises the following components in parts by weight: 65-90 parts of nylon 6 resin, 1-20 parts of first maleic anhydride graft copolymer, 0.1-10 parts of second maleic anhydride graft copolymer and 0.01-5 parts of nucleating agent. The injection-molding-grade nylon 6 composite material fills the blank in the injection-molding-grade nylon for special-function pieces, has favorable bonding property with zinc-base alloy materials, and can implement quick stripping in the injection molding process; and the prepared part has stable size, keeps stable in the alternating temperature experiment of 90 DEG C (2 hours) to 30 DEG C (2 hours), and widens the application range of the nylon 6.

A stable connecting structure for a drawer and a slide rail of a piece of furniture comprises a furniture cabinet body, a slide rail assembly and a furniture drawer, wherein the upper portion of the side plate of the furniture drawer is provided with a cavity, the lower portion of the side plate of the furniture drawer is provided with an assembly groove, a front connecting device is arranged on the cavity, a connecting portion is arranged on the front connecting device, the inner top face of the assembly groove extends to form a supporting portion, a movable slide rail of the slide rail assembly is arranged on the side plate, the rear end of the movable slide rail is connected to the rear end of the side plate through a buckling-hooking portion in a clamped mode when the movable slide rail and the side plate are assembled, the front end of the movable slide rail is clamped to the connecting portion of the front connecting device through a connecting-matching portion in a clamped mode, and when the side plate is stressed with respect to the movable slide rail at least in the upper direction and the lower direction, the connecting portion and the supporting play a mutual supporting role to enhance the connecting stability between the side plate and the movable slide rail. By the adoption of structural improvement, the stable connecting structure for the drawer and the slide rail of the furniture has the advantages that the stable connecting structure is simple, reasonable, excellent in performance, safe, reliable, low in manufacturing cost, convenient and fast to assemble, the members are compact, stable and firm in connection, the service life is long, the appearance is attractive and the like, and is good in practicability.

A thermoplastic and elastic color paint for spraying it on road pavement is prepared through mixing rosin oil, thermoplastic elastomer and epoxy resin together for mutual dissolving, adding pigment, filler, plasticizer, and antioxidizing agent, stirring, adding ethylenediamine and stirring. Its advantage is high resistance to high temp (105 deg.C) and low temp (-15 deg.C).

The invention relates to low-emissivity glass which belongs to the field of energy-saving technology and has a single silver coating structure. The low-emissivity glass only uses one dielectric layer. In the basic structure, the low-emissivity glass orderly comprises a glass substrate 10, a silver coating 11 and a dielectric layer 12, wherein the dielectric layer comprises 1-10 sublayers, and the sublayers comprise a silicon film, a silicon alloy film, a silicon-oxygen film, a silicon-nitrogen film, a silicon-oxygen-nitrogen film, a silicon alloy-oxygen film, a silicon alloy-nitrogen film, a silicon alloy-oxygen-nitrogen film, a transition metal-nitrogen film and the like. The low-emissivity glass of the invention has the advantages of stable performance, high reliability and high production efficiency, can greatly reduce the cost, and is beneficial to large-scale popularization and application.

The invention relates to an off-line coated low-irradiation glass belonging to the technical field of energy saving. The basic structure of the off-line coated low-irradiation glass comprises a glass substrate, a medium layer and a silver layer. The off-line coated low-irradiation glass is technically characterized in that the medium layer comprises a plurality of sub layers, wherein at least one sub layer is made by silicon or silicon alloy film, or silica film, silicon nitrogen film, silicon oxynitride film, silicon alloy oxygen film, silicon alloy oxygen-nitrogen film and the like the components of which are gradually changed, or aluminum, titanium, zirconium, hafnium, tantalum and other metal the components of which are gradually changed or a nitrogen film of an alloy of the metals. The low-irradiation glass not only has stable performance and high reliability, but also high protection efficiency, can greatly reduce the cost and is beneficial to large-scale popularization and application.

The invention provides a guiding and guarding clamping device and a rolling machine. The guiding and guarding clamping device comprises a framework, an adjusting mechanism comprising two screws and a guiding and guarding mechanism comprising an upper guiding and guarding box and a lower guiding and guarding box, wherein the framework comprises an upper cross beam and a lower cross beam which are opposite, a first side wall and a second side wall which are opposite, a first front pressing plate and a first rear pressing plate which are vertically connected to the first side wall, and a second front pressing plate and a second rear pressing plate which are vertically connected to the second side wall; a first sliding groove is defined by the first side wall, the first front pressing plate and the first rear pressing plate, and a second sliding groove is defined by the second side wall, the second front pressing plate and the second rear pressing plate; first and second external threads are separately arranged at the upper and lower parts of each screw; the two ends of the upper guiding and guarding box are separately arranged in a manner capable of sliding in the first sliding groove and the second sliding groove and are in surface contact with the first sliding groove and the second sliding groove; the two ends of the lower guiding and guarding box are separately arranged in a manner capable of sliding in the first sliding groove and the second sliding groove and are in surface contact with the first sliding groove and the second sliding groove; and the screws rotate and drive the upper and lower guiding and guarding boxes to slide in a face-to-face manner or back-to-back manner. The guiding and guarding clamping device has large bearing capability.

The invention discloses an anti-skid injection molding nut which comprises a nut body and an anti-skid net. The anti-skid net is arranged on the outer side of the nut body and is coaxial with the nut body, and the anti-skid net is connected with the nut body through a connection column. The anti-skid net is arranged on the periphery of the nut body, the anti-skid net and the nut body are fixed together through the connection column, through the structural characteristics of the anti-skid net, friction force and meshed force of plastics and the nut are greatly improved, connection firmness of the plastics and the nut is improved, and the nut disengaging phenomenon can not occur when other components are fixed.

The invention discloses a shock wave excitation apparatus capable of realizing excitation of a MEMS microstructure in a vacuum environment. The shock wave excitation apparatus comprises a substrate; a hand-operated triaxial displacement bench and a support are arranged on the substrate; a needle electrode unit pointing to a microstructure unit is arranged on a Z-axis slide carriage of the hand-operated triaxial displacement bench; the microstructure unit comprises an installation sleeve; an elastic pedestal is arranged on one end in an installation hole of the installation sleeve via press mounting; the elastic pedestal is in the shape of a circular ring slice and an annular boss is arranged at the central part of the elastic pedestal; a plate electrode is inlaid in the elastic pedestal via an insulation sleeve; the MEMS microstructure is mounted on the inner side of the elastic pedestal; an optical glass plate is arranged in on the other end in the installation hole via press mounting; the outer wall of the installation sleeve is provided with a vacuum joint along a radial direction; the needle electrode and the plate electrode are electrically connected with two poles of a high-voltage capacitor respectively; and the two poles of the high-voltage capacitor are electrically connected with the positive and negative electrodes of a high-voltage supply respectively. The shock wave excitation apparatus is firm in structure installation, simple and safe to operate and convenient for testing of the dynamic behavior parameters of the microstructure in the vacuum environment.

The present invention is the process of installing vehicle chassis with air suspension and the support bar therefor. The installing process includes the first installing support bar between the vehicle frame and the axle or between the upper damper bracket and the lower damper bracket to make the vehicle frame in normal running height, the subsequent inflating the air bag, and final removing the support bar. The support bar has simple structure, easy use and high universality. The process of installing vehicle chassis with air suspension is simple, reasonable, high in efficiency, high in installation quality and low in cost, and may be applied widely.

The invention discloses an anti-slip injection molding nut. The anti-slip injection molding nut comprises a nut body which is provided with an equatorial groove, and a plurality of anti-slip protrusions are symmetrically arranged on two sides of the equatorial groove. The equatorial groove is formed in the middle of the nut body, the anti-slip protrusions are arranged on the two sides of the equatorial groove, and therefore friction force and meshing force of plastic and the nut are enhanced, connection firmness of the plastic and the nut is improved, and the nut will not break away when fixing other components.

The invention relates to a roller assembly and a rolling rotor compressor. The roller assembly comprises a roller and a slider, the roller can eccentrically move in a cylinder body, the front end of the slider is adsorbed to the periphery of the roller by magnetic force, the rear end of the slider can be inserted in the sidewall of the cylinder body, and a suction cavity and an exhaust cavity areformed in the cylinder body. Thus, as the roller eccentrically moves in the cylinder body, the front end of the slider always abuts against the periphery of the roller, the situation of the slider separating from the roller cannot occur, so that the situation of capacity fluctuation is effectively prevented, and thereby the overall operating performance is increased.

The invention discloses a needle bar frame body of a high-speed embroidery machine. The needle bar frame body comprises a needle bar frame, a needle bar installed on the needle bar frame and a presserfoot matched with the needle bar, wherein the presser foot comprises a presser foot rod and a presser foot structure connected to the bottom end of the presser foot rod, the presser foot structure isprovided with a first thread clamping structure and a second thread clamping structure, a hook knife penetrates through the space between the first thread clamping structure and the second thread clamping structure, the first thread clamping structure can move relative to the second thread clamping structure and can reset, the first thread clamping structure makes contact with the second thread clamping structure when being located at a reset position, the presser foot rod is provided with a matching structure, the needle rod frame is provided with a locking structure used for preventing thematching structure from moving forwards, the needle rod frame is provided with an unlocking mechanism capable of enabling the locking structure and the matching structure to generate relative displacement so as to relieve the blocking effect of the locking structure on the matching structure. The needle bar frame body has the beneficial effects that the higher function integration degree is achieved, and the technical purpose of stably keeping upper thread clamping is achieved.