60results about How to "Assembly process requirements are low" patented technology

A disposable safety syringe includes a barrel body, a needle seat holding a needle in position, a plunger body, having an interior cavity, slidably mounted in the barrel body, and a needle retraction device including an end stopper, having a retraction ring, mounted in the plunger body, a compression spring mounted at the end stopper, and a retraction head integrally downwardly and integrally protruding from a bottom end of the needle seat to align with the retraction ring, wherein when the plunger body is kept moving towards the upper portion of the barrel body after the injection operation is completed, the retraction head is engaged with the retraction ring to couple the needle seat with the end stopper, such that the compression spring pushes the end stopper into the plunger body to retract the needle seat and the needle into the plunger body.

An electronic direct-reading counter for a wet type water meter comprises a plurality of indication wheels and a plurality of carry coupling wheels corresponding to the indication wheels. The electronic direct-reading counter is characterized in that an indication wheel box of a meter seat is provided with mutually-closed indication wheel cavities and cavity grooves and cavities for mounting of circuit boards, the indication wheels are coaxially mounted at sectional intervals in the indication wheels, shaft core portions on two sides of each indication wheel are provided with a permanent magnet and a magnetic shielding plate respectively, and a magnetically inductive angle sensor coaxially corresponding to each permanent magnet of the shaft core of the indication wheel is arranged in the middle of each indication wheel. The electronic direct-reading counter has the advantages that 360-degree all-around measurement of the indication wheels can be realized, measurement resolution depends on practical precision of analog-to-digital conversion, and reading is accurate and stable; each indication is carried over to '0' every '9', reading from low order to high order in a carry manner is realized, sufficient reference information is available, and coincident codes and error codes are avoided; and electronic devices are reduced greatly, the risks of product faults can be reduced greatly, and water proofing level can reach IP68.

The present invention relates to a basic jaw type self-locking differential, which has the characteristics of no collision, high reliability, and long service life. The present invention is characterized in that a force transmission tooth and separating teeth and an accessory blocking tooth which are positioned on driven rings are connected as a whole; a self-limiting type blocking embedding mechanism is embedded by two embedding mechanisms of a force transmission embedding mechanism and a separation embedding mechanism under the differential condition, and axially positioned in the two mechanisms and radially positioned in the two mechanisms, between the two mechanisms or outside the two mechanisms, a lift angle of both sides blocking the working surface is formed to enough ensure the friction self-locking collided on the both sides and the stability of the blocking operating condition, in order that the lift angle has the capabilities that the adaptive axle base changes and the abrasion is automatically compensated, and the slipping mode of no collision is unvaryingly maintained between the separating teeth in the operating condition, two processes of the self-separating block process and the embedding return process are absolutely reliable, and has no relation to the stability of the spring parameter compacted by the driven rings, hence the problem that the driven rings on the both sides are synchronously separated is not a problem any longer. The processing of the differential is obviously improved, the difficulty of the assembly is largely reduced, and the performance, the service life, and the interchangeability, etc. are remarkably improved.

The invention discloses a magnetic absorption type connecting structure of a display device, which comprises a front frame, a rear cover and a display screen, wherein the display screen is connected and fixed in the rear cover, and the front frame is in magnetic absorption connection with the rear cover or the display screen through a magnet block. Compared with the prior art, the connecting structure in which the front frame is in magnetic absorption connection with the rear cover or the display screen through the magnet block has the characteristics of high assembly efficiency, low assembly strength, convenience for disassembly, low requirements for assembly technology, low research and development manufacture costs, good assembly quality and attractive appearance. The connecting structure can be widely used in electronic display devices, such as televisions, mobile phones, computer displays and the like.

The invention provides a rolling rotor compressor pump body structure. The rolling rotor compressor pump body structure comprises a crankshaft, a first air cylinder, a second air cylinder, a first roller and a second roller, wherein the first roller is arranged in the first air cylinder, the second roller is arranged in the second air cylinder, and a first eccentric part matched with the first roller and a second eccentric part matched with the second roller are arranged on the crankshaft; the first air cylinder and the second air cylinder are adjacently arranged; the inner diameter of the first air cylinder is greater than that of the second air cylinder; the space between the first air cylinder and the second air cylinder is sealed by the first roller and the first eccentric part. The invention also relates to an air conditioner adopting the pump body structure. The rolling rotor compressor pump body structure has the advantages that the structure is simple, the requirements on an assembly technology are low, a compressor works stably, as a middle division plate is eliminated, the height of the pump body is reduced, the distance between an upper flange and a lower flange is shortened, the rigidity of the crankshaft is improved, and the alleviation of vibration and the lowering of noise of the crankshaft are facilitated. After the pump body structure is applied to the air conditioner, the vibration of the air conditioner is small, and the noise of the air conditioner is low.

The invention discloses a hydraulic push-return impact oscillator, comprising an upper connector, a barrel and a lower connector connected in a threaded manner sequentially from top to bottom. A diversion assembly, a reciprocating drive assembly and a backpressure valve assembly are nested in the barrel. The diversion assembly comprises a guide sleeve, an upper valve block, a valve block, a lower valve block and a distribution plate. The reciprocating drive assembly comprises a drive piston and a reversing valve. The backpressure valve assembly comprises a backpressure valve head, a backpressure valve block and a discharge sleeve. Pumped high-pressure liquid is in the oscillator and diverted by the diversion assembly to provide hydraulic drive horsepower for the reciprocating drive assembly, the reversing valve controls the drive piston to finish an upper stroke and a lower stroke, the drive piston also drives the backpressure valve head to reciprocate, the backpressure valve head periodically opens or closes the backpressure valve block so as to enable a pulse backpressure-relief process in a string, the drive piston will impact on the upper valve block or the lower valve block at the end of each stroke, and therefore, periodical mechanical impact is generated.

The invention provides a low-speed large-torque downhole hydraulic motor and an operating method thereof. The low-speed large-torque downhole hydraulic motor comprises a flow distribution assembly, an axial reciprocating driving assembly, an axial rotary conversion assembly and a reverse turning preventing assembly. The axial rotary conversion assembly comprises a driving spindle, a power sleeve, a rotary sleeve, a first spring and a distribution valve, wherein the driving spindle is provided with an external straight-groove spline and an external threaded spline, the power sleeve is provided with an internal threaded spline groove and third clutch teeth, and the rotary sleeve is provided with fourth clutch teeth. The clutch teeth are arranged at the lower end of the power sleeve, the third clutch teeth make contact with the fourth clutch teeth at one end of the rotary sleeve, and the first spring is used for providing pretightening force. The external threaded spline on the driving spindle is engaged with the internal threaded spline groove in the power sleeve. The external straight-groove spline on the driving spindle is matched with a straight groove in the distribution valve. Compared with a screw motor, the low-speed large-torque downhole hydraulic motor is much lower in manufacturing cost, longer in service life, more excellent in fluid adaptability and capable of being maintained on site more easily.

The invention relates to a vehicle walking device and provides an excavator steering drive axle having axial compensation positioning and flexible axial limiting effects. The excavator steering drive axle comprises an axle housing, two brake devices, two hubs, a transmission and a steering apparatus, wherein the axle housing axially extends and is of hollow structure, the transmission comprises a main speed reducer and universal drives, the main speed reducer is arranged in the middle of the inner side of the axle housing and used for inputting and converting a radial torque of an engine into an axial torque to be output, the two brake devices are respectively arranged on the hubs at two ends of the axle housing and used for controlling drive of the hubs, the two hubs are respectively and rotatably arranged at two ends of the axle housing, and the universal drives are arranged in a steering knuckle and output and transfer the axial torque of the main speed reducer to the two hubs rotating with respect to the brake devices respectively. The steering apparatus is arranged between the axle housing and the two hubs and controls rotating angles of the two hubs through the steering knuckle to achieve steering of an automobile, a wheel side planetary speed reducing mechanism is arranged between the torque output end of the universal drives and the two hubs respectively, the axial torque output ends of the universal drives are respectively provided with a flexible axial compensation limiting device enabling all sun wheels and all planetary gears on the planetary speed reducing mechanisms to be always kept meshed and driven on the same axial face.

The invention discloses a lamp focal length adjusting mechanism. A lamp light source is connected with a lamp radiator housing; an adjusting assembly is connected with the lamp radiator housing; the lamp light source is fixedly mounted on the lamp radiator housing through a light source bracket and fixing screws; the adjusting assembly comprises a rotating ring, a focusing lens, a lens fixing ringand a silica gel adjusting ring, wherein the focusing lens is mounted in the lens fixing ring in a snap joint manner; a protruding strip on each of two sides of the lens fixing ring corresponds to agroove in the corresponding side of the lamp radiator housing, and is mounted in the lamp radiator housing; the rotating ring is clamped on the lamp radiator housing, and positioning protruding pointsin the rotating ring correspond to oblique grooves of the lens fixing ring; and the smooth surface of the silica gel adjusting ring is connected to a groove in the outer wall of the rotating ring ina sleeving manner. Through the adoption of the lamp focal length adjusting mechanism disclosed by the invention, the problems that in the prior art, in the process of lamp focal length adjustment, themachining accuracy requirement is high, the processing cost is high, the adjusting process is not smooth and the mechanism is unstable after being used for a long term, are solved; and the lamp focallength adjusting mechanism is simple and compact in structural dimension, low in cost, and stable in effect.

Disclosed is a miniature circuit breaker. The miniature circuit breaker mainly overcomes the defects of existing miniature circuit breakers that the structure of a tripping mechanism is complicated, requirements for the assembly technique are high, reliability is low, productive efficiency is low, and due to the facts that restoration is achieved through tension springs mostly and restoration inaccuracy is caused easily after the tension springs are used for a long time, the service life of the circuit breakers is affected. The miniature circuit breaker is characterized in that a hinging column is sleeved with a latch torsion spring, the two ends of the latch torsion spring abut against a jump pin and a latch respectively, a moving contact hinging shaft is sleeved with a moving contact torsion spring, the two ends of the moving contact torsion spring abut against a moving contact and a support respectively, the hinging column is further sleeved with a support torsion spring which is arranged on the back portion of the support, and the two ends of the support torsion spring abut against the support and the inner wall of a shell. According to the miniature circuit breaker, the torsion springs are arranged between the jump pin and the latch, between the moving contact and the support and between the support and the inner wall of the shell for restoration, restoration is accurate, deviation is avoided, and the service life of the circuit breaker is effectively prolonged.

The invention discloses a supporting structure for a coaxial light-small type reflecting mirror with high thermal stability, belongs to the technical field of aerospace, and aims to solve the problems of complicated structure, likeliness in system failure, high process level requirement and low interchangeability in the prior art. The supporting structure for the coaxial light-small type reflecting mirror with the high thermal stability comprises a reflecting mirror, a flexible joint and a core shaft, wherein an outer ring of the flexible joint is fixed with the reflecting mirror in a gluing way, and an inner ring of the flexible joint is fixed with the core shaft in a gluing way; the reflecting mirror, the flexible joint and the core shaft are coaxial; the flexible joint is of an annular structure and comprises an annulus and a plurality of single-arm structures; the single-arm structures are circumferentially and uniformly distributed on the outer wall of the annulus; each single-arm structure is a double-layer flexible unloading structure, two grooves are radially formed in the single-arm structure, and each groove is perpendicular to the diameter direction. According to the supporting structure for the coaxial light-small type reflecting mirror with the high thermal stability, a core shaft supporting mode is adopted; the external space of the reflecting mirror is not occupied; the structure is simple, and the surface shape of a mirror surface can be kept stable within a larger temperature change range; the whole optical system is convenient and quick to install and adjust, requirements on an assembly process are not high, and all parts are better interchangeable.

The invention discloses a fan drive. A centrifugal fan, a fan impeller shaft and an engine output shaft of a small diesel engine are arranged coaxially, the centrifugal fan is fixed on an underframe, a connecting seat is arranged on the outer side of the fan impeller shaft, the centrifugal fan is connected with a bearing seat through hexagonal head bolts I, the bearing seat is connected with the connecting seat, the connecting seat is connected with a supporting seat flange through hexagonal head bolts IV, and the supporting seat flange is connected with the small diesel engine through hexagonal head bolts III; a clutch wheel is fixed on the fan impeller shaft through a flat key I; and a centrifugal clutch is fixed on a shaft sleeve of the output shaft of the small diesel engine through a flat key II. When the engine starts, the revolving speed of the output shaft is low, the clutch is not combined to the clutch wheel, and the engine can start in a no-load manner; and when the fan drive works, the engine is throttled up, the revolving speed is increased, the clutch is automatically combined to the clutch wheel, and transmission torque drives a fan impeller to rotate. The fan drive is reasonable in structure, stable in performance, relatively low in cost and convenient to operate.

The invention discloses a breaker divide-shut brake keeping mechanism and belongs to the technical field of appliance switch protection. The breaker divide-shut brake keeping mechanism comprises a drive shaft (2), a sliding rod sleeve (5) connected with the drive shaft, a center shaft (7) matched with the sliding rod sleeve, a sliding rod shaft (6) sleeved with the sliding rod sleeve, a spring (8) connected to the sliding rod shaft in a sleeving mode, a second shaft (11) matched with a support (9), a movable contact (14) installed on the support, a fixed contact (15) matched with the movable contact, and a limiting gear (10) matched with the support to limit the distance between the movable contact and the fixed contact, wherein the support is connected with the sliding rod shaft through a first pin (12) and the first pin is matched with a third strip-shaped hole (9-2) formed in the support. By means of a bistable state keeping mechanism, the structural design is simplified, the requirement of the keeping mechanism for the manufacturing process and the assembling process is lowered, the brake dividing movement and the brake shutting movement of the contacts are more precise and reliable, and the brake dividing phenomenon caused by a non-load reason will not occur even the breaker divide-shut brake keeping mechanism is used on a shaking occasion.

The invention discloses a method for correcting corneal curvature instrument system astigmatism to correct the system astigmatism of a corneal curvature instrument. According to the method, noise filtering, binaryzation and edge extraction processing are carried out on a standard eye CCD image, centroids of all parts of an annular image divided according to angles are solved, the oval of the annular image is fitted, the mapping relation of corresponding points of the fitted oval and the excircle is calculated, the system error is obtained, and then the error correction is carried out on the actual measurement. The method has the advantages that the correction process is fast and accurate, and system hardware does not need to be modified.

The invention relates to an axial positioning and connecting structure of a cam shaft, comprising an independent machine body, a timing gear, a flat key, a cam shaft and a flywheel shell, wherein the cam shaft can be rotatably arranged in the independent machine body, the timing gear is arranged on the cam shaft and is connected with the flat key for realizing transmission, and the flywheel shell is fastened on the independent machine body by virtue of a flywheel shell fastening bolt. The axial positioning and connecting structure of the cam shaft is characterized in that an axial positioning block is arranged on one side of the flywheel shell, which is opposite to the timing gear, and the axial positioning block presses the end face of the timing gear to realize axial positioning of the cam shaft. According to the axial positioning and connecting structure of the cam shaft disclosed by the invention, the traditional mounting pressure plate is omitted, structural design and manufacturability are improved, rejection rate of a part is greatly reduced, and requirement for an assembly technology is also greatly reduced, and thus economic benefit is improved.

The invention discloses a sensor position adjusting mechanism for non-contact measurement of shaft parts. The sensor position adjusting mechanism for non-contact measurement of the shaft parts comprises an equipment measuring basis, a fixing assembly, a translation assembly and a rotating assembly, wherein the fixing assembly is fixedly installed on the equipment measuring basis; the translation assembly is installed and fixed on the fixing assembly in an up-down lifting adjustment mode; and the rotating assembly is installed on the translation assembly in a relatively rotating mode. According to the sensor position adjusting mechanism for non-contact measurement of the shaft parts provided by the invention, two adjustments of translation and rotation are alternately used, so that the final error can be converged to a relatively small value, and high-precision adjustment of a measurement point is realized; and the structure provided by the invention is beneficial to reducing the process requirements on processing and assembling, and is easy to popularize.

A grounding coplanar waveguide-rectangular waveguide filtering transition structure comprises a substrate (1), the upper and lower surfaces of which are plated with metal layers; a grounding coplanar waveguide transmission line (2), printed on the metal layer (1-1) on the upper surface of the substrate and used for inputting electromagnetic waves; a broadband filtering transition structure (3), etched on the metal layer (1-2) on the lower surface of the substrate, connected with the rectangular waveguide (5), comprising a feed branch knot (3-1), a short-circuit branch knot (3-3), a coupling branch knot (3-2) and a resonant cavity, and used for broadband transmission and out-of-band rejection performance of electromagnetic waves; and a first metalized via hole (4) penetrating through the substrate (1) and connecting the output end of the grounding coplanar waveguide transmission line (2) with the feed branch knot (3-1). According to the transition structure, on one hand, the broadband filtering transition structure (3) can be arranged at the bottom of the substrate (1) to be grounded so as to avoid large radiation loss, on the other hand, the working bandwidth of electromagnetic wave transmission can be increased through mutual coupling (3) among various resonant structures, and the transition structure has good out-of-band suppression filtering performance.

The invention provides a medicament mixing device and a use method thereof. The device is used for putting medicaments to be transferred or mixed into a sample part, the medicaments enter a quantification part from the sample part through the rotating direction, the rotating speed and the rotating time of the base under the effect of centrifugal force, quantification is conducted on the needed medicament, the rotating direction, the rotating speed and the rotating time of the base are adjusted again, the quantitative medicaments are controlled to enter a mixing part from the quantification part through a siphon micro valve, and therefore the needed medicaments are sufficiently and evenly mixed, the evenly-mixed medicaments are discharged from an outlet pipeline, and the PCR reaction pretreatment process including medicament injection, mixing, nucleic acid extraction and PCR reaction system establishing is achieved. According to the medicament mixing device, due to the arrangement of a channel and the siphon micro valve and adjustment on the rotating direction, the rotating speed and the rotating time of the base, control over mixing of the medicaments is simplified, and the reliability is improved; and due to the arrangement of the channel and the siphon micro valve, the medicament mixing device is simple in structure, the requirement for preparing and assembling technologies is lowered, and therefore the preparing and detecting cost is reduced.

The invention discloses a heat exchanger, which relates to a heat exchange device used in a refrigeration system. The key design point of the heat exchanger comprises: the heat exchanger comprises connecting components which are arranged at the end parts of flat runner pipes close to liquid collecting pipes; the connecting components comprise connecting parts, at least one cushion block and at least one fastener, wherein each connecting part is arranged on one side of the width direction of each of the flat runner pipes; the at least one cushion block is arranged on the other side of the width direction of each of the flat runner pipes; and the least one fastener passes through the clearance between two adjacent flat runner pipes to connect and fix the connecting components and the cushion blocks. Preferably, the supported walls of the connecting components cover the clearance between the liquid collecting pipes and adjacent plate sheets. The heat exchanger has the advantage of simple and reliable structure. As the outside wind blown to the heat exchanger completely passes through the plate sheets between the flat runner pipes for heat exchange, the thermal efficiency of the heat exchanger is improved, and the heat exchanger is particularly suitable for refrigeration air-conditioning units.

The invention discloses a transmission structure of a spiral spreading machine spiral distributor. The transmission structure comprises a spiral distribution box, wherein the spiral distribution box is internally provided with a driving wheel and a driven wheel driven by the driving wheel, and the driven wheel is arranged in the spiral distribution box through a bearing; the right part of the driven wheel is sequentially provided with a bearing end cover, a joint, an end plate, a main shaft fixing body and a spiral shaft, and the bearing end cover is fixedly connected on the spiral distribution box; the left end surface of the bearing end cover can press the driven wheel, the driven wheel drives the joint to rotate, and the end plate is provided with an embedding section embedded in driven teeth and a spacing section which can be used for spacing the joint; and the main shaft fixing body can be used for sealing the end plate on the right end of the joint, and the main shaft fixing body is connected with the spiral shaft and can drive the spiral shaft to rotate. The transmission structure provided by the invention has the advantages that the structure is simple, the use is convenient, the manufacturing accuracy on parts and the assembling process requirements on a whole mechanism are lower, the spiral shaft can be located and can be transferred with power through the assembling connection of the main shaft fixing body and the spiral shaft, and the operation reliability of the mechanism is guaranteed.

The invention relates to the field of fittings of a weaving machine. A yarn conveying device comprises a shell and a transmission belt wheel, a main shaft, a thread conveying wheel, a dust preventioncover, a thread guide rack, a yarn feeding porcelain ring and a yarn discharging assembly which are arranged on the shell, a cleaning hole is formed in the top of an aluminum-made wheel body, and a micro-arc oxidation ceramic layer which is integrally connected with the aluminum-made wheel body is arranged on the outer surface of the aluminum-made wheel body; the yarn discharging assembly comprises a mounting rack, a yarn clamping machine and two yarn discharging porcelain rings, wherein the yarn clamping machine and the yarn discharging porcelain rings are fixed on the mounting rack. The yarnconveying device has the advantages that the service life is long, the yarn clamping machine is convenient to assemble and maintain, foreign materials, such as yarn floccules, in a yarn conveying wheel is convenient to remove, and the production cost is low.

The invention discloses a wet brake drive axle of a scraper. The drive axle comprises a hub reduction mechanism, a wet brake, a half axle, a main drive assembly and an axle housing. The wet brake is provided with a brake shell, a brake spring is arranged in the brake shell and makes a piston cover pressed on a brake piston ring, the brake cover is connected with a fixed static friction plate, a movable friction plate is arranged on the position corresponding to the static friction plate, a connection groove is formed in the outer side of the brake cover, and a floating seal is arranged in the connection groove; a planetary wheel is disposed on the hub reduction mechanism and fixed to a planetary wheel frame through a planetary wheel shaft; a sun gear is fixed to the half axle, the sun gear drives the planetary wheel and the planetary wheel frame to rotate around the sun gear, the planetary wheel frame is fixed to a hub shell through bolts, and the planetary wheel frame drives the hub shell to rotate. The friction force between the movable friction plate and the static friction plate is reduced, the service life is improved, the structure is simple, and the use and maintenance cost is low.

The invention belongs to the technical field of electromagnetic fields and microwaves, and discloses a miniaturized non-contact waveguide transmission line and application thereof. The miniaturized non-contact waveguide transmission line comprises a waveguide upper cover and a waveguide base body, the waveguide base body is formed by arranging periodic metal convex body arrays on the outer walls of the two sides of a waveguide groove, and the waveguide upper cover is of a groove-shaped structure and is nested on the waveguide base body; gaps exist between the inner surface of the waveguide upper cover and all opposite faces of the waveguide base body, the metal convex body arrays and the opposite metal faces form electromagnetic band gaps, and the electromagnetic shielding of waveguide transmission signals is achieved. Compared with a traditional waveguide transmission line, the non-contact waveguide transmission line has the advantages that broadband single-mode transmission performance is achieved, meanwhile, a non-contact structure is achieved, many problems caused by poor metal electric contact can be effectively avoided, the surface treatment and assembly process requirements are greatly reduced, and higher design flexibility is achieved. According to the invention, the transverse size is greatly reduced, which is more beneficial for realizing small size and light weight of microwave and millimeter wave circuits, components and systems.

The invention provides a speed adjusting method for a direct-current brushless motor without a position sensor. The method comprises the following steps: (1) inputting alternating-current 220V voltage via an alternating-current power supply and a driving board, and rectifying the voltage to output direct-current 310V voltage; (2) outputting, by a switching power supply, 3.3V, 5V or 12V voltage output by rectifying to a control end, an amplifying circuit or a sampling circuit of a singlechip, an insulated gate bipolar transistor or an intelligent power module to supply power; (3) meanwhile, connecting 310V direct-current voltage output by rectifying to the insulated gate bipolar transistor or the intelligent power module to drive the direct-current brushless motor; (4) sampling counter electromotive forces of three phases U, V and W of the motor by the sampling circuit, and amplifying signals by the amplifying circuit; (5) performing analog-digital conversion on the acquired current signals by an AD of the singlechip; and (6) analyzing the revolving speed and the position of a rotor by adopting a perception algorithm without position detection to carry out closed-loop control. The method at least has the advantages that the revolving speed of the direct-current brushless motor can be accurately adjusted, the structure design is simplified, the size of the motor is reduced, the requirement of the assembly process is low and the like.

The invention relates to an axial positioning and connecting structure of a cam shaft, comprising an independent machine body, a timing gear, a flat key, a cam shaft and a flywheel shell, wherein the cam shaft can be rotatably arranged in the independent machine body, the timing gear is arranged on the cam shaft and is connected with the flat key for realizing transmission, and the flywheel shell is fastened on the independent machine body by virtue of a flywheel shell fastening bolt. The axial positioning and connecting structure of the cam shaft is characterized in that an axial positioning block is arranged on one side of the flywheel shell, which is opposite to the timing gear, and the axial positioning block presses the end face of the timing gear to realize axial positioning of the cam shaft. According to the axial positioning and connecting structure of the cam shaft disclosed by the invention, the traditional mounting pressure plate is omitted, structural design and manufacturability are improved, rejection rate of a part is greatly reduced, and requirement for an assembly technology is also greatly reduced, and thus economic benefit is improved.

Disclosed is a miniature circuit breaker. The miniature circuit breaker mainly overcomes the defects of existing miniature circuit breakers that the structure of a tripping mechanism is complicated, requirements for the assembly technique are high, reliability is low, productive efficiency is low, and due to the facts that restoration is achieved through tension springs mostly and restoration inaccuracy is caused easily after the tension springs are used for a long time, the service life of the circuit breakers is affected. The miniature circuit breaker is characterized in that a hinging column is sleeved with a latch torsion spring, the two ends of the latch torsion spring abut against a jump pin and a latch respectively, a moving contact hinging shaft is sleeved with a moving contact torsion spring, the two ends of the moving contact torsion spring abut against a moving contact and a support respectively, the hinging column is further sleeved with a support torsion spring which is arranged on the back portion of the support, and the two ends of the support torsion spring abut against the support and the inner wall of a shell. According to the miniature circuit breaker, the torsion springs are arranged between the jump pin and the latch, between the moving contact and the support and between the support and the inner wall of the shell for restoration, restoration is accurate, deviation is avoided, and the service life of the circuit breaker is effectively prolonged.

The invention provides a sensor for a heart blood pump and the heart blood pump, the sensor comprises a static pressure sensing end arranged on a heart blood pump conveying sleeve, and the static pressure sensing end is used for detecting the static pressure of blood flowing through the outer side of the conveying sleeve; the static pressure sensing end comprises a pressure sensing film chip and an optical signal transmission line, the pressure sensing film chip is provided with a pressure sensing face making contact with blood, and the pressure sensing face is parallel to the axial direction of the conveying sleeve. The pressure sensing membrane chip obtains static pressure signals in the direction perpendicular to the blood flow direction and transmits the static pressure signals out through the optical signal transmission line. According to the sensor, the pressure sensing face is parallel to the blood flowing direction, the blood static pressure is directly measured, a blood retention area does not need to be arranged at the static pressure sensing end to measure the blood static pressure, thrombus is avoided, it is guaranteed that the blood static pressure can be measured when blood flows, and the sensor can be used for short-term and long-term heart blood pump support.

The invention provides a novel damper suitable for an automobile tail door electric push rod. The novel damper comprises a brake coupling, a brake outer sleeve, brake gaskets, a brake friction plate,a brake disc elastic piece and a brake threaded end cover, the brake outer sleeve, the brake gaskets, the brake friction plate, the brake disc elastic piece and the brake threaded end cover are arranged on the brake coupling in a sleeving fit mode, the inner space of the brake outer sleeve is of a structure with the wider upper portion and the narrower lower portion, the lower portion of the brakeouter sleeve is attached to the lower portion of the brake coupling, the two brake gaskets are located above the attaching portion between the brake coupling and the brake outer sleeve, the brake friction plate is arranged between the two brake gaskets, the brake disc elastic piece is arranged on the brake gaskets, and the brake threaded end cover is arranged on the brake disc elastic piece. Thenovel damper has the beneficial effects that the structure is simple and reasonable, the assembly efficiency is improved, the requirements of the assembly process and the height of the damper are reduced; and the strength of the structural material is relatively high, the service life is prolonged, and the universality of the product is improved.