30results about How to "Prevent mutual attraction" patented technology

The invention discloses a ball attachment device, a solder ball picking method and a solder ball mounting method. The ball attachment device comprises a printing room and a vacuum picker, wherein the printing room comprises a grid template, a side wall, a top wall and at least two scraping blades; the grid template, the side wall and the top wall are combined to form a loading space; multiple grid holes are formed in the grid template; the distribution pattern of the multiple grid holes corresponds to the pattern of the solder ball mounting position of an element on which a solder ball is to be mounted; the vacuum picker is located below the printing room and comprises multiple suction nozzles; at least some of the multiple suction nozzles are aligned with the multiple grid holes respectively; and the solder ball is located in the loading space and pushed to pass through the grid template by moving the scraping blade so that the solder ball drops into the grid hole and is sucked by the suction nozzle. By adopting a printing mode of moving the scraping blade so that the solder ball drops into the grid hole and is sucked by the suction nozzle, the loss of the solder ball can be reduced or eliminated, and the reliability and efficiency of the ball attachment technology are improved.

The invention relates to telescopic nunchakus. The telescopic nunchakus comprises a nunchakus body A, a nunchakus body B and a chain connecting the nunchakus body A with the nunchakus body B, wherein the nunchakus body A is of a hollow structure, the inner diameter of the nunchakus body A meets the requirement that the nunchakus body B can be contained and fixed in the nunchakus body A, and the connecting end of the nunchakus body A and the chain is positioned in the nunchakus body A and is free connection. The telescopic nunchakus has the advantages that 1) the nunchakus body B is contained in the nunchakus body A, and when the nunchakus is stretched, the chain and the nunchakus body B are both contained in the nunchakus body A, the whole length of the nunchakus is the length of the nunchakus body A, and compared with a conventional telescopic nunchakus structure, the telescopic nunchakus has a more precise and compact structure; 2) the nunchakus body B is fixed by adopting a strong magnet, the structural form is simple, and the nunchakus body B is thrown out; and 3) a tail cover is arranged at the tail end of the nunchakus body A and is provided with the strong magnet, so that the absorption between the strong magnet and the inner wall of the nunchakus body A can be avoided, and meanwhile, when the magnetism of the strong magnetic is not enough, the strong magnet can be replaced easily, and the stretching of the nunchakus can not be affected.

The invention provides a two-piece ceramic ball valve. The two-piece ceramic ball valve comprises a valve body; a side cover is movably installed on one side of the valve body, and bolts are movably installed at the corner positions between the valve body and the side cover; a fixing seat is movably installed on the outer surface of the upper end of the valve body, a plate seat is movably installed at the middle position of the outer surface of the upper end of the fixing seat, and a pull rod is fixedly installed on one side, away from the side cover, of the plate seat; ring flanges are fixedly installed on one side of the side cover and one side, away from the side cover, of the valve body; and a valve ball is movably installed in the valve body, a clamping groove is formed in the outer surface of the upper end of the valve ball, and a valve rod is arranged in the clamping groove in a penetrating manner. According to the two-piece ceramic ball valve, sealing seats can be squeezed towards the valve ball when worn, the airtightness of the ball valve is ensured, and leakage is avoided; dirt adhering to the surface of the valve ball can be conveniently removed, and the influence on water quality is reduced; and the ball valve can be automatically locked after being opened or closed, and it is effectively avoided that as the pull rod is touched by mistake, normal operation of the ball valve is affected.

The invention relates to the manufacturing field of regenerated chemical fibers, and discloses a non-dyed regenerated polyester staple fiber preparation process, which includes the following steps: S1. preparing raw materials; S2. pretreatment; S3. heating and melting; and mixing the materials treated in S2 with color masterbatches, and then heating and melting together, wherein the color masterbatches comprise the following raw materials in parts by weight: 70-90 parts of dimethyl terephthalate, 20-40 parts of propylene glycol, 120-150 parts of pigments and 110-130 parts of dispersants; and the dispersants comprise polyethylene wax and cetyltrimethylammonium bromide, and the mass ratio of the polyethylene wax to the cetyltrimethylammonium bromide is 4: 1; S4. spinning; S5. cooling and forming; S6. oiling; S7. winding and bundling; and S8. crimping and cutting; After the above steps, the non-dyed regenerated polyester staple fiber is prepared. The pigments can be prevented from agglomerating when dissolved in the molten polyester in the molten state, so that the pigment can be dispersed evenly, and finally the dyed colored polyester has a better dyeing effect.

The invention discloses a supersonic air injection device. The supersonic air injection device is mainly composed of a mounting plate, an air duct transition section, an injection pipe, spray pipes, a secondary cooling air duct, a supporting plate and an inlet pipe nozzle. The injection pipe is arranged in the middle of the air duct transition section, and the spray pipes are symmetrically arranged Laval spray pipes. High-temperature and high-pressure gas enters through the inlet pipe nozzle, flows through the injection pipe and is sprayed out from the spray pipes, a negative pressure area is formed, and low-temperature air is sucked in from an air inlet, passes through the mounting plate and the air duct transition section, is mixed at the secondary cooling air duct and flows out from an air outlet. The supersonic air injection device is used for injecting the low-temperature air through the high-temperature and high-pressure gas, and the injected low-temperature air can serve as a cold source to be supplied to equipment for heat dissipation. The layout of the spray pipes and flow channels is more reasonable, the mixing uniformity of injection airflow and injected airflow is improved, and therefore the injection effect can be effectively improved.

The invention discloses an operating room nursing tray fixing device, which comprises rollers and a third fixing plate. Supporting frames are arranged at upper ends of the rollers, a first fixing plate is mounted at the front bottom ends of the supporting frames, a second fixing plate is inlaid in back middle portions of the supporting frames, adjusting bolts are fixed to front middle portions ofthe supporting frames, and the third fixing plate is mounted at the back upper ends of the supporting frames. By rotation of the supporting frames on the rollers through rotating shafts, multi-angle adjustment of the rollers can be realized, a moving direction of the fixing device can be changed arbitrarily when the fixing device is pushed, and the device is capable of rotating on the rollers during tray placement, so that medical personnel can put trays into and take the trays out of the device; during device pushing and tray placement, influences caused by device shaking to the trays are reduced under the elastic action of springs, and falling or collision of medicines placed in the trays can be avoided.

The invention provides a remote infrared magnetic therapy portable type anion water hotbed, belonging to the household sundries field, particularly relates to the bedding field. The bed part consists of two blocks of (or more than two blocks of) multiple-cavity hollow plates in which a water circulation cavity and a venting cavity with a plurality of air vents are arranged; the inner wall of the venting cavity is painted with far infrared element which can transmit far infrared ray; the inside part of the venting cavity is positioned with a permanent magnet and provided with an anion generator; the two ends of the multiple-cavity respectively connect with the water circulation cavity in parallel by using a water-flow distributor. The invention solves the problem that the waterbed is inconvenient for carrying and transporting and can provide temperature really needed by human body with functions of magnetic therapy, far infrared ray health care and improving bedroom environment.

The invention belongs to the field of fabric surface trimming and particularly discloses a handheld dust cloth cutting machine. The handheld dust cloth cutting machine comprises a protective casing, a cutting device, an elastic element, an electromagnet, a controller and an attraction block, wherein the attraction block and the electromagnet attract each other; the cutting device comprises a first cutter and a second cutter which are hinged with each other; the electromagnet is fixed on a holding portion of the first cutter; the attraction block is fixed on a holding portion of the second cutter; the electromagnet is fixed inside the protective casing; one end of the elastic element is fixed on the attraction block, and the other end of the elastic element is fixed in the protective casing; and the controller is electrically connected with the electromagnet. Compared with a conventional manual cutting method, in the technical scheme, the dust cloth can be cut only through switching-on or switching-off of the electromagnet; scissors are not required to be controlled frequently; more strength is saved; and the efficiency is high.

The invention belongs to the technical field of faucet equipment and particularly relates to a press type faucet based on a pilot structure. The faucet comprises a main body, a main body cover is fixedly connected on the main body, a pressing device fixing seat is fixedly connected on the main body cover, a magnet A is arranged in the pressing device fixing seat in a clearance fit mode, a connecting shaft is in threaded connection with the upper surface of the magnet A, the other end of the connecting shaft is in threaded connection with a pressing plate, and a pressing spring is arranged between the lower surface of the pressing plate and the upper surface of the pressing device fixing seat; a magnet B is arranged in the pressing device fixing seat in a clearance fit mode, a small piston rod is in threaded connection with the lower surface of the magnet B, a big piston is arranged in the main body cover in a clearance fit mode, and a pilot hole is formed in the center of the big piston; a sealing cylinder is arranged inside the main body, and a big piston sealing ring is arranged between the big piston and the sealing cylinder in a matched mode.

A preparation method of a water-based thickener comprises the following steps: mixing deionized water, sodium hydroxide and sodium bicarbonate to prepare a buffer solution; mixing deionized water, analuminum salt and a magnesium salt to prepare a magnesium-aluminum-containing aqueous solution; mixing deionized water, polyvinylpyrrolidone and sodium hydroxide to prepare a polyvinylpyrrolidone-containing solution; under a stirring condition, dropwise adding water glass, the magnesium-aluminum-containing aqueous solution and the polyvinylpyrrolidone-containing solution into the buffer solution in sequence to obtain a crystallization solution; crystallizing the obtained crystallization liquid at a constant temperature, and then carrying out cooling, centrifuging, water washing , drying, crushing and sieving to obtain a finished product. According to the preparation method, polyvinylpyrrolidone is inserted into layers of magnesium-oxygen octahedrons and silicon-oxygen tetrahedrons of a magnesium-aluminum silicate mineral through an in-situ hydrothermal synthesis method; and meanwhile, polyvinylpyrrolidone is adsorbed on the inner and outer surfaces of magnesium-aluminum silicate mineral particles through intermolecular force and hydrogen bonds, so that dispersion stability of the magnesium-aluminum silicate mineral in water is improved, and overall viscosity is improved.

The invention discloses a construction method and application of a spine mark point positioning model, and belongs to the field of medical image processing. The constructed spine mark point positioning model comprises a central point positioning network, a segmentation module, a corner positioning network and a combination module; the central point positioning network comprises a plurality of cascaded central point positioning sub-networks; the corner positioning network comprises a plurality of cascaded corner positioning sub-networks; according to the invention, multi-stage coordinate offset regression is carried out based on the cascaded sub-networks in a spine central point positioning stage and a spine corner positioning stage, and PCA mark point shape constraints are introduced, so that each cascaded sub-network is regressed to the position offset after PCA dimension reduction instead of directly regressing the coordinate points, the problem that mark points attract each other due to inter-spine homogenization in a regression process is solved, and the accuracy of spine mark point positioning is greatly improved.

The invention discloses preparation and application of a bismuth ferrite loaded graphene composite material. The preparation method specifically comprises the following steps: adding bismuth ferrite into a modified graphene solution for ultrasonic treatment to obtain a turbid liquid; and adding alkali liquor into the turbid liquid, conducting stirring continuously, and controlling the temperatureto be lower than 37 DEG C in the heating process. The modified graphene is prepared by modifying graphene oxide with usnic acid. The prepared bismuth ferrite loaded graphene composite material has excellent photocatalytic degradation performance, high degradation stability and certain antibacterial activity, can also promote obvious reduction of pH, COD value and chromaticity in wastewater, and has good application in industrial wastewater and waste gas.

The invention discloses a magnetic fitting type high-protective-property mask, and belongs to the technical field of masks. According to the magnetic fitting type high-protective-property mask, a triggering water ball and a fitting magnetic chain are arranged on a mask body, when a user wears the mask, the triggering water ball is squeezed, water in the triggering water ball enters the fitting magnetic chain, on one hand, the attaching magnetic chain is forced to slightly expand to improve the attaching effect, on the other hand, the attaching magnetic chain can release a magnetic field which is originally shielded after making contact with water, the attaching magnetic chain located on the two sides of the nose attract each other under the action of magnetic attraction force, and the attaching effect with the nose area is further improved; the mask body is guaranteed to be almost free of gaps during wearing, so that the protection effect is obviously improved, a user can adjust the fitting degree of the fitting magnetic chain after water of different volumes enters the fitting magnetic chain by controlling the degree of extruding and triggering the water ball, the tightening feeling generated by excessive fitting can be avoided, and the protection effect is improved while the wearing experience of the user is ensured.

The invention relates to the technical field of injection molds, and discloses an injection molding machine mold taking device based on plastic mold machining. The injection molding machine mold taking device comprises a rack; a fixed mold is fixedly connected to the side face of the rack; a movable groove is formed in the position, close to the side wall, of the interior of the rack; a supporting rod is slidably connected to the interior of the movable groove; a reset spring is movably connected to the surface of the supporting rod; a metal contact is fixedly connected to the side wall of the end of the supporting rod; a resistor strip is fixedly connected to the side wall of a movable groove; and a mounting frame is fixedly connected to the interior of the rack. The resistance in an air pump is reduced, so that the working efficiency of the air pump is improved. The air pump sucks air in a spring air bag into an air storage groove, at the moment, the spring air bag can contract and drive an extrusion rod to stretch out of the outer side of the fixed mold, and a plastic part is extruded out of the surface of the fixed mold. Therefore, the plastic part can be automatically extruded when a movable mold and the fixed mold are separated from each other, and the injection molding work efficiency is improved.

The invention belongs to the technical field of permanent magnet assembly, relates to a bonding device and method for a base with an annular groove and a permanent magnet, and aims to solve the problems of high cost, low efficiency and long consumed time in bonding of the base with the annular groove and the permanent magnet. The device comprises a pedestal, and the pedestal is provided with the base with the annular groove, a magnetic repulsion device used for releasing the polarity opposite to that of the permanent magnet and a lifting sealing mechanism used for enabling the permanent magnet to make contact with a groove bottom bonding face of the base with the annular groove. The magnetic repulsion device is composed of a coil, a power supply and a switch, and the coil surrounds the base with the annular groove and is connected with the power supply through the switch. The bonding device generates a magnetic field opposite to the polarity of the permanent magnet through the magnetic repulsion device so as to generate repulsive force to the permanent magnet, so that the phenomena that when the base with the annular groove is bonded with the permanent magnet, the permanent magnet collides with the base due to the magnetic force of the permanent magnet, so that the permanent magnet is chipped and cracked, can be avoided. When the current of the coil is disconnected, the bonding device loses the magnetic field, and the permanent magnet is quickly and accurately bonded with the base with the annular groove.