33results about How to "Achieve tight fit" patented technology

The invention belongs to the fixture field used in processing procedures of electronic products, and in particular relates to a positioning fixture for assembling a flexible printing circuit (FPC). The fixture comprises a layer of bottom plate, a layer of FPC carrier plate arranged on the bottom plate, a product positioning pin and a carrier plate positioning pin, wherein the product positioning pin and the carrier plate positioning pin vertically penetrate through the FPC carrier plate and are inserted into the bottom plate. The fixture is characterized in that a thin steel sheet is also arranged between the bottom plate and the FPC carrier plate and provided with holes so that the product positioning pin and the carrier plate positioning pin can pass through, the product positioning pin and the carrier plate positioning pin are tightly clamped by the thin steel sheet through the holes so that shaking is not generated, and the thin steel sheet is also provided with a layer of bonnet lock pressing plate used for pressing the thin steel sheet tightly. The fixture can reduce the possibility of deviation caused in the assembling process, is convenient for assembling, improves the assembling precision of the FPC and provides the accurate positioning for subsequent processing procedures of the FPC.

The invention discloses a phase shifter dielectric plate, which is arranged between a phase shift circuit and a cavity and moves along a preset locus, wherein the dielectric plate is provided with a plurality of protrusions for pressing against the top wall or the bottom wall of the cavity, and the protrusions are higher than the plane of the dielectric plate. When the phase shifter dielectric plate is applied to a phase shifter, the dielectric plate is in tight fit with the cavity, and the problem of high signal index fluctuation in the moving process of the dielectric plate due to a large clearance between the dielectric plate and the cavity is solved; moreover, because the contact area between the protrusions and the cavity is small, high friction is not produced between the both, and abnormal transmission of the dielectric plate is avoided. In addition, the invention further discloses a phase shifter adopting the dielectric plate.

The invention discloses a novel orthodontics correction method. The novel orthodontics correction method comprises the steps of (1) obtaining the data of the oral cavity of a patient; (2) determining the parameter of an oral cavity three-dimensional model; (3) constructing a three-dimensional model of an invisible correction machine; (4) making the invisible correction machine; and (5) performing treatment. According to the orthodontics correction method, the problem that a conventional treatment scheme which is set is greatly different from actual desired results for invisible correction is solved, the correction machine device can be used for designing treatment re-set targets according to the specific situation of different patients from designing the treatment method to making the invisible correction machine, so as to realize tight cooperation of the design target with the wearing precision of the correction machine by a patient to be corrected, which is favorable for correction for the patient.

The invention discloses an automobile part air reservoir convenient to mount. The automobile part air reservoir convenient to mount comprises a supporting base; a vertically arranged supporting box body is connected to the external wall of one side of the top of the supporting base through a bolt; a first groove is formed in the external wall of the other side of the top of the supporting base; horizontally arranged sliding rods are connected to the internal walls of the two ends of one sides of the first groove through bolts; and third supporting blocks are connected to the external walls ofthe other sides of the bottoms of the two sliding rods through bolts. According to the automobile part air reservoir convenient to mount, as the supporting box body is arranged, a first supporting block drives a second supporting plate to move to the right so as to drive two fixing clamping hooks to approach each other and be inserted into fixing clamping grooves when an air reservoir body is pushed; and then a supporting rod is rotated so that the supporting rod is clamped between two first supporting plates to effectively prevent the first supporting block from moving to the left; and therefore, the mounting stability of the air reservoir body is improved.

The invention relates to granular silicon dioxide electrolyte and a storage battery. The granular silicon dioxide electrolyte comprises the following raw materials by weight percent: 3.0 to 5.0 percent of SiO2, 1.2 to 1.8 percent of Na2SO4, 42 to 45 percent of H2SO4, 0.08 to 0.12 percent of SnSO4, 0.1 to 0.3 percent of fluorine-containing resin, 0.5 to 1.2 percent of methyl polyethylene glycol, 0.08 to 0.12 percent of carboxymethylcellulose and 46 to 53 percent of self-made pure water. Compared with the prior art, the electrolyte is formed by compounding SiO2 particles in different particle size ranges and a 1.35g/mL sulfuric acid aqueous solution, so that the thermal runaway phenomenon of the battery can be effectively prevented, and the capacity for absorbing foreign ions in the electrolyte is relatively good; current distribution on the surface of an electrode is uniform; by adopting a thin polar plate technology, the quantity of positive and negative polar plates is increased, the thickness of the negative polar plate on the outermost side is reduced, the utilization rate of battery active substances is increased, the tight assembling of the battery is realized, and the softening and dropping of positive polar plate active substances can be slowed down.

The invention discloses a middle bundle core comprising a fork and a spiral; an outer wall of the fork is provided with a stop step which is used for limiting the axial movement of the spiral; the spiral is provided with an annular elastic stretching portion; the elastic stretching portion is provided with multiple groove holes which are arranged in the circumferential direction so that an inclined elastic deforming strip is formed between adjacent groove holes. According to the invention, an elastic stretching portion is formed through opening holes in the side wall of the spiral so that it is easy for die sinking and the manufacture cost is low. The elastic deforming strip is obliquely arranged so as to achieve the same expansion and contraction quantity. Compared with present structures, small deformation is required by the elastic deforming strip so that irreversible deformation is not liable to occur.

The invention is applied to the technical field of connectors and provides a gap eliminating part. The gap eliminating part comprises a first gap bridging seam and a second gap bridging seam which aresequentially and alternatively arranged, wherein the first gap bridging seam and the second gap bridging seam respectively begin from the two ends of the gap eliminating part and are arranged in theaxial direction of the gap eliminating part, the first gap bridging seam and the second gap bridging seam do not penetrate through the gap eliminating part in the axial direction and penetrate througha lateral wall of the gap eliminating part in the radial direction, and in addition, the first gap bridging seam and the second gap bridging seam have lapped parts on the axial direction. The gap eliminating part disclosed by the invention can make hole shafts achieve close fit without the interference fit situation; furthermore, gaps caused by thermal expansion and cold contraction can be made up, and the hole shafts can keep a fastened state all the time.

The invention provides a washing machine. The washing machine comprises an inner barrel, a connecting disc, a sealing plate and a driving device. The connecting disc is arranged at the bottom of the inner barrel, the connecting disc is provided with drainage holes and a first matching face, and the drainage holes run through the first matching face. The sealing plate is opposite to the connecting disc, and a second matching face matched with the first matching face is arranged on the sealing plate. An output shaft of the driving device is connected with the sealing plate and is used for driving the sealing plate to rotate. The first matching face and the second matching face are obliquely arranged in the circumferential direction of the sealing plate, and thus when the sealing plate rotates, the second matching face can be attached to the first matching face to seal the drainage holes. According to the washing machine, the drainage holes are sealed through the tight fit of the first matching face on the connecting disc and the second matching face on the sealing plate, and the reliability of the washing machine is improved while normal washing and drainage functions are achieved.

The invention provides a jack connector assembly. The jack connector assembly comprises a jack sleeve and a round cage type cylindrical contact part, wherein the jack sleeve comprises a cylindrical contact sleeve; the round cage type cylindrical contact part is mounted in an inner hole of the cylindrical contact sleeve and comprises a fixed contact ring which is in fixed contact with the jack sleeve and a separable contact grid which can be separated from or in contact with a contact pin; a closing opening of the fixed contact ring is tightly closed to form a thin-wall cylindrical structure, so that the fixed contact ring is tightly matched with an inner hole of the cylindrical contact sleeve. The invention further provides a processing method of the jack connector assembly. The inner holeof the cylindrical contact sleeve generates radial overload outer pressure, which is uniformly distributed along the peripheral direction, on the fixed contact ring; under the action of the force, the closing opening of the fixed contact ring is tightly closed to form the external pressure thin-wall cylindrical structure; the structure has very strong elastic stability, so that tight match between the fixed contact ring and the cylindrical contact sleeve is realized and reliable electric contact is formed.

The invention discloses a honeycomb screw plate fixation assembly and a refrigerator. The honeycomb screw plate fixation assembly is used for clamping and fixing a pasting board of the refrigerator and comprises a honeycomb plate and fixation screws. The honeycomb plate is provided with a first surface and a second surface, wherein the first surface is provided with at least one assembling hole, and the aperture of the first assembling hole is gradually decreased towards the direction of the second surface of the honeycomb plate. The fixation screws comprise screw caps and screw rods, wherein the screw rods are in threaded fit with the first assembling holes. According to the invention, when the fixation screws are tapped into the honeycomb plate, the honeycomb plate is not deformed, the performance of fixation between the honeycomb plate and the fixation screws can be improved, and the assembling stability of the refrigerator is improved.

The invention discloses a metal injection molded finished product correcting and shaping device and a correcting and shaping process thereof, relates to the related field of metal injection molding, and aims to solve the problem that a molding product cannot be corrected and shaped in the prior art. One side of the upper end of a device bottom plate is provided with a mounting back plate; the mounting back plate is fixedly connected with the device bottom plate; the mounting back plate is provided with a mounting insertion hole; one side of the rear end of the mounting insertion hole is provided with arc clamping plates; each arc clamping plate is arranged to be in an arc section plate shape; and each arc clamping plate is provided with a third telescopic rod; the number of the third telescopic rods is equal to that of the arc clamping plates; each arc clamping plate is fixedly connected with the corresponding third telescopic rod; one side of the mounting back plate is provided with afirst electric sliding rail; the upper end of the first electric sliding rail is provided with a first electric sliding block; the first electric sliding block is electrically connected with the first electric sliding rail; and the upper end of the first electric sliding block is provided with a connecting plate.

The invention provides an optical fiber connector and a tail wiring assembly thereof, and can solve the problems that an optical fiber is easily scratched and damaged with the inner wall of an existing optical fiber connector during assembly, and the reliability and the percent of pass are low due to the fact that optical signal transmission is affected by chippings generated by scratching. The tail wiring assembly comprises a main shell and an optical cable fixing piece; a fiber protection sliding sleeve is assembled with the optical cable fixing piece in an inserting and sleeving manner; thefiber protection sliding sleeve is provided with an extension position and a retraction position relative to the optical cable fixing piece; when in the extending position, the optical fiber fixing piece and the optical cable fixing piece jointly enclose a fiber protection space; when in the retraction position, the optical fiber can extend out of the front end of the optical fiber protection sliding sleeve; the fiber protection sliding sleeve and the optical cable fixing piece are in sliding resistance fit in the direction of a plug bush so as to keep relative fixation when no external forceis applied to the two; a stop structure is arranged in the inner cavity of the main shell and can be matched with the front end of the fiber protection sliding sleeve in an abutting mode to enable the fiber protection sliding sleeve to overcome the sliding resistance acting force with the optical cable fixing piece to retract; and the main shell is also provided with an opening for the optical fiber to extend out of the main shell.

The invention provides a dustproof structure of a relay, and the structure comprises a shell dustproof structure and a tail piece dustproof structure; the shell dustproof structure is arranged betweenan outer cover and a base, and the tail piece dustproof structure is arranged on a tail piece in the base; in the shell dustproof structure, the end face of the top of a base extends outwards to forma circle of boss structure along the side direction of the inner wall, an outer cover is buckled on the base, the two ends of the bottom of the outer cover are each provided with an inwards-concave structure matched with the two ends of the boss structure, and a sealing gasket is arranged between the outer cover and the base. The sealing gasket is annularly arranged on the periphery of the boss structure, the inner side of the sealing gasket is matched with the outer side of the boss structure of the base in shape, and the outer side of the sealing gasket is consistent with the outer side ofthe base in shape. By improving the structure and additionally arranging the sealing gasket between the base and the outer cover, the base and the outer cover can be matched with the boss of the baseand the concave structure of the outer cover in a staggered mode, and the dustproof performance of the relay and the contact reliability of a contact in the field use process are improved on the basisthat the interchangeability with an existing safe railway signal relay part is guaranteed.