41results about How to "Large caliber" patented technology

The invention discloses a method for improving a genetic algorithm based on liquid crystal optical phased array rarefaction, which comprises the following steps of: firstly, constructing a liquid crystal optical phased array physical model, then setting optimization parameters and fitness functions of the genetic algorithm according to array characteristics, obtaining a far-field directional diagram by utilizing space fast Fourier transform, and screening the fitness functions to obtain a far-field directional diagram; and performing coding, crossing, variation, inheritance, decoding and array population updating operation on the array population after the fitness function screening, and finally obtaining a final optimization result according to iteration stopping conditions. According to the method, through the improved genetic algorithm applied to the liquid crystal optical phased array, the number of control units of the phased array with the same aperture is reduced, under the condition that the total number of the control units is limited, the size, the weight and the complexity of a system are not changed, the larger aperture of the liquid crystal optical phased array can be achieved, and the method has a good application prospect for grating lobe suppression of the liquid crystal optical phased array. The number of control units is reduced, the aperture is increased, and an algorithm which is high in efficiency and easy to implement is provided.

The discharging device comprises a discharging hopper and a discharging piston which is externally connected with a power assembly and used for driving the discharging hopper to be opened and closed, and the discharging hopper comprises a feeding opening ring and a connecting handle connected with the feeding opening ring; a plurality of connecting strips which are evenly distributed at intervals are fixedly connected to the lower portion of the feeding port ring along the periphery of the feeding port ring, the ends, away from the feeding port ring, of the connecting strips incline towards the center of the feeding port ring to form a discharging port of the discharging hopper, the caliber of the discharging port is the smallest before a packaging bag reaches the discharging port, and the caliber of the discharging port is smaller after the packaging bag reaches the discharging port. The discharging piston enters the discharging hopper to enable the connecting strips to be extruded and then expand outwards, then the caliber of the discharging port is increased, meanwhile, the discharging port opens a bag opening of a packaging bag, discharging is convenient, the friction force between materials and the discharging hopper is reduced, meanwhile, large materials cannot fall off from gaps of the connecting strips, and rapid discharging of the large materials is achieved.

The invention discloses a special-shaped composite filter tip rod and relates to the technical field of cigarette filter rods, the special-shaped composite filter tip rod comprises filter rod roll paper and tipping paper wrapping the filter rod roll paper and used for connecting the filter tip rod and a cigarette, a filter element is wrapped in the filter rod roll paper, and the filter element comprises a common filter section, a first special-shaped filter section and a second special-shaped filter section. One end of the common filter section is connected with a cigarette body of the cigarette, the other end of the common filter section is connected with one end of the first special-shaped filter section, the other end of the first special-shaped filter section is connected with one end of the second special-shaped filter section, the first special-shaped filter section is provided with a first special-shaped through hole, a spiral filter element is fixedly arranged in the first special-shaped through hole, and a through hole is formed in the spiral filter element. The contact area of smoke and the spiral filter element can be increased through the through hole, and the variable-diameter special-shaped through hole is communicated with the first special-shaped through hole. According to the special-shaped composite filter tip rod, the contact area of the filter element can be increased, and meanwhile the flow speed of smoke is prevented from being affected.

The invention relates to the technical field of construction drilling, in particular to a hard rock stratum drilling device and method.The hard rock stratum drilling device comprises a rotating rod and a drilling barrel fixedly installed at the bottom end of the rotating rod, the top end of the rotating rod is connected with the output end of a rotary drilling machine through a hydraulic coupler, and an impact mechanism and a lifting and releasing assembly are arranged above the drilling barrel; the impact mechanism comprises a first cylinder, and the first cylinder is fixedly installed on the top of the rotating rod. In the drilling process of the rotary drilling rig, if the rotary drilling rig encounters a hard rock stratum, the hard rock stratum can be automatically impacted, in the rotating process of the drilling barrel, a downward impact force can be applied, the damage effect on the hard rock stratum is effectively improved, the instantaneous pressurization load is increased, and the damage to the hard rock stratum is reduced. In addition, when the positions of the hard rock strata are inconsistently distributed at the front end of the drill hole, the specific position of the hard rock strata below the drill barrel can be detected, circulating and directional impact is achieved, and the construction speed is further increased.

The invention provides a flat-field apochromatic microscope objective and an optical system, and the microscope objective comprises a first lens group which comprises at least one cemented lens group and at least one independent lens, the cemented lens group comprises at least two cemented lenses, and the first lens group is used for expanding the aperture of a light beam and reducing the incident angle of the light beam, the partial spherical aberration and partial field curvature of the flat-field apochromatic microscope objective are corrected; the second lens group comprises at least one balsaming lens group, the balsaming lens group comprises at least two balsaming lenses, and the second lens group is used for converging the light beams from the first lens group so as to correct residual spherical aberration and residual chromatic aberration of the flat-field apochromatic microscope objective; according to the flat-field apochromatic microscope objective provided by the invention, flat-field apochromatic in a visible light to near-infrared light wave band range is realized, a large numerical aperture and a large view field range are realized, and the microscope objective with high resolution, a large view field and a wide wave band is realized at the same time.

The invention discloses a laser radar and a control method. The laser radar comprises a rotating mirror and a transmitting-receiving device, the rotating mirror rotates around a central shaft, and the transmitting-receiving device comprises a first transmitting-receiving assembly, a second transmitting-receiving assembly, a third transmitting-receiving assembly and a fourth transmitting-receiving assembly. The first transmit-receive assembly and the third transmit-receive assembly are configured to emit laser to the reflecting surface and receive return light reflected by the reflecting surface to form a field of view when the rotating mirror rotates in a first angle range. The second transmit-receive assembly and the fourth transmit-receive assembly are configured to emit laser to the reflecting surface and receive return light reflected by the reflecting surface to form a field of view when the rotating mirror rotates within a second angle range. Thus, the first transceiving assembly and the second transceiving assembly alternately emit laser and receive return light, and the third transceiving assembly and the fourth transceiving assembly alternately emit laser and receive return light, so that the problem that the return light receiving aperture is reduced due to large laser steering angle caused by rotation of the rotating mirror is solved, and the return light receiving aperture of the laser radar is increased. And the distance measurement of the laser radar is improved.

The utility model relates to the technical field of pet food processing, in particular to a pet food mixing machine convenient for feeding, which comprises a machine body, a feeding mechanism, a stirring assembly, a feeding pipe and a discharging groove, the machine body comprises a machine frame, the surface of the machine frame is fixedly connected with a mixing bin and a motor, the inner surface of the mixing bin is rotatably connected with the stirring assembly, and the outer surface of the mixing bin is fixedly connected with the feeding pipe and the discharging groove; and the expanding mechanism comprises a guide hopper. The feeding pipe is provided with the guide hopper and is connected with the guide hopper under the action of the sleeve, so that the guide hopper can expand the range of receiving fed pet food raw materials of the mixing machine, the caliber of an inlet of the feeding pipe is increased, and the situation that part of the raw materials fall on the outer side when being fed due to the small caliber of the feeding pipe is avoided; by means of the structure, feeding is convenient for workers, waste of food raw materials is reduced, meanwhile, the protruding blocks, the connecting holes and the inserting holes can be inserted more firmly through the springs, and then the guide hopper is installed more firmly.

The invention provides an optical lens and electronic equipment. The optical lens sequentially comprises, from a first side to a second side, a first lens with focal power, a second lens with focal power, a third lens with focal power and a fourth lens with focal power, the first side surface of the second lens is a concave surface, and the second side surface of the second lens is a concave surface; the third lens has positive focal power, and the second side surface of the third lens is a convex surface; the fourth lens has positive focal power, and the first side surface of the fourth lens is a convex surface; the first side face of the fifth lens is a convex face, and the second side face of the fifth lens is a concave face. According to the invention, the problem that small CRA, high MTF and rear focal length of an optical lens in the prior art are difficult to consider at the same time is solved.

The application discloses a design method of an off-axis coaxial combined optical system based on asymmetric aberration compensation, and belongs to the technical field of optical system design. The method solves the problem that asymmetric aberration introduced by an off-axis part in the design of an off-axis coaxial combined optical system is difficult to be corrected compatibly with the rotationally symmetric aberration of a coaxial part. The optical system comprises an off-axis front group and a coaxial rear group. The design method is as follows: active compensation design of asymmetric aberration is performed on the off-axis front group, and an initial structure is built according to design requirements; the initial structure is subjected to field offset; an evaluation function of the off-axis front group for the compensation of asymmetric aberration about the optical axis is constructed; the asymmetric aberration of the off-axis front group is compensated and adjusted until the function value of the evaluation function is the minimum value. Correction design of the remaining rotationally symmetric aberration is performed on the coaxial rear group; the off-axis front group and the coaxial rear group are integrated and optimized, and the design is completed. The design method can be applied to the optimization of an existing off-axis coaxial combined optical system.

The utility model relates to the technical field of vacuum feeding machines, and discloses a vacuum feeding machine which comprises a barrel body, a feeding pipe is arranged on the barrel wall of the barrel body, a material pumping pipe connector is installed in a pipe opening of the feeding pipe, and a fixing plate is fixedly arranged on the right side face of the feeding pipe. An opening corresponding to the feeding pipe is formed in the plate wall of the fixing plate, a first limiting plate attached to the plate wall of the fixing plate is arranged on the outer wall of the material pumping pipe joint, an inserting block is transversely arranged on the plate wall of the first limiting plate, and an inserting groove corresponding to the inserting block is formed in the plate wall of the fixing plate; the material pumping pipe joint is connected with the feeding pipe, so that the material pumping pipe can be conveniently butted with the barrel body, the mounting position of the material pumping pipe joint can be limited through combination of a fixing plate and a first limiting plate, and the limiting effect of the material pumping pipe joint can be improved through cooperation of an inserting block and an inserting groove; the L-shaped plate, the open groove, the elastic inserting piece and the positioning inserting groove are matched to fix the installation position of the material pumping pipe connector.

The present disclosure provides a Vivaldi antenna and a design method, comprising a dielectric substrate, comprising a circular arc dielectric substrate and a rectangular dielectric substrate, wherein the circular arc dielectric substrate is closely connected to the rectangular dielectric substrate; a radiation patch, wherein the radiation patch is respectively located on a top layer and a bottom layer of the dielectric substrate; a grounding structure, wherein the grounding structure is located on the top layer of the dielectric substrate; a feeder, wherein the feeder is located on the bottom layer of the dielectric substrate; a fan-shaped expansion structure is loaded at the opening of the radiation patch, wherein the fan-shaped expansion structure is symmetrical about the vertical central axis of the antenna; a plurality of fan-shaped directors are loaded on the two-layer surface of the dielectric substrate, wherein the fan-shaped radii of the plurality of fan-shaped directors are the same, the fan-shaped curvatures are the same, and the spacings between adjacent fan-shaped directors are the same; the aperture of the antenna is effectively expanded, the gain of the antenna is enhanced, and the antenna loss is not affected at the same time.

The utility model discloses an engine oil nozzle valve sealing ring, which relates to the technical field of valve sealing rings, and comprises a sealing sleeve with one open end, a notch arranged at the closed end of the sealing sleeve, a sealing lip fixedly sleeved at the open end of the sealing sleeve, and a diameter expanding mechanism which comprises a push-pull plate, a push-pull rod and a plastic plate, the plastic plate is provided with a pneumatic component used for acting on the multiple push-pull rods to move synchronously. Through the arrangement of the diameter expanding mechanism, when the sealing sleeve needs to be sleeved on the outer wall of the oil nozzle, air is sucked into the inner cavity of the air conveying seat in the pneumatic component in advance, the internal pressure of the air conveying seat and the pressure of the sliding seats are reduced, and then the pistons and the push-pull rods in the sliding seats integrally and synchronously slide away from the sealing lip; and the corresponding push-pull plates are respectively pulled, so that the plurality of push-pull plates pull the opening of the sealing sleeve at a plurality of parts, the caliber of the sealing sleeve is rapidly enlarged instead of manual work, and the sealing sleeve can be conveniently sleeved on the oil nozzle.

The conversion valve comprises a valve body and two ejector rods, a first cavity, a third cavity and two second cavities are formed in the valve body, and the two second cavities are independently arranged and communicate with the first cavity and the third cavity correspondingly; the two ejector rods correspond to the two second cavities one to one, each ejector rod penetrates through the corresponding second cavity, and the ejector rods can do reciprocating motion relative to the valve body so as to control the corresponding second cavities to be switched between the first cavity and the third cavity in a communicating mode. When the change-over valve works, the medium flow channels are switched; the first chamber and the third chamber are separated by the two second chambers, so that the distance between the first chamber and the third chamber can be increased, and the change-over valve can increase the calibers of the channel ports at the positions of the first chamber and the third chamber as required; therefore, the change-over valve can be suitable for switching control over large-flow media.

The utility model discloses a guide device for a drill rod of a directional drilling machine, which relates to the technical field of guide of drill rods and comprises a guide device. The guiding device is composed of a shell, a rotating fluted disc and a fixing base, the fixing base is installed in the middle of the interior of the shell, a large bearing is installed in the rotating fluted disc and installed on the outer side of the fixing base, and connecting rods are rotatably installed on the periphery of the outer side of the rotating fluted disc. And one end of the connecting rod is rotationally installed on one side of the rotating plate, one end of the rotating plate is rotationally installed on the upper side of the fixing base, and the other end of the rotating plate extends into the hollow position of the shell and is rotationally provided with a limiting roller at the upper end. The drill rod limiting device is driven by the power mechanism to rotate when in use, the limiting rollers can be quickly adjusted, the drill rods can be limited in all directions when the multiple limiting rollers are used at the same time, and meanwhile the positions of the drill rods with different diameters can be limited by adjusting the positions of the limiting rollers.

A microwave plasma CVD apparatus (1) is provided with: a chamber (10A); a mounting table (110A) provided in the center of the chamber (10A) when the chamber (10A) is viewed in plan; a coaxial structure part (80A) including a center conductor (81) positioned in the center of the chamber (10A) in plan view of the chamber (10A) and parallel to the axial direction of the axis of symmetry of the internal resonance mode of the chamber (10A), and an outer conductor (82) positioned around the center conductor (81); a plurality of microwave introduction ports (20), (20),..., which are provided in a coaxial structure part (80A) of the chamber (10A), and which are coupled so as to match the internal resonance mode of the chamber (10A); and a microwave introduction window (30A) that transmits microwaves while pressure-isolating the chamber (10A) from the waveguide section (40A).

The utility model discloses a guiding member for a breaker in a new energy automobile. The guiding member comprises a housing and a fixed frame. Positioning holes are formed in the periphery of the rear end of the shell, conductive jacks are formed in the periphery of the rear end of the shell, positioning pins are arranged on the periphery of the interior of the fixing frame, conductive plugs are installed in the fixing frame and inserted into the conductive jacks, and installation holes are formed in the periphery of the outer side of the shell. Fixing bolts are arranged on the periphery of the fixing frame. When the shell is installed in the fixing frame, the positioning pin is inserted into the positioning hole, when the positioning pin and the positioning hole are in butt joint, the conductive plug and the conductive jack can be in butt joint, after installation is completed, the knob is rotated, the knob drives the threaded rod to rotate, the threaded rod can rotate into the installation hole, and the conductive plug and the conductive jack are in butt joint. Therefore, the fixing frame and the shell can be fixed.

The invention discloses a blade anti-drop shutter structure, which comprises a square fixed seat, a shutter assembly is arranged on the fixed seat, the shutter assembly comprises a square bottom plate, two pairs of blade groups and a pair of anti-drop separation blades, and each pair of blade groups comprises a main blade, a first auxiliary blade and a second auxiliary blade; a through hole allowing the second positioning shaft to be inserted therein is formed in the anti-falling separation blade; the two pairs of blade groups are mounted between the square bottom plate and the upper cover plate; the two ends of the blade set are limited through the anti-disengagement blocking pieces, and the anti-disengagement blocking pieces and the blades are closed synchronously. Firstly, the coincidence area of the blocking piece and the upper cover or the fixing base is large, and the blocking piece is high in impact resistance and cannot be disengaged; and secondly, the tail of the blade on the side of the separation blade is clamped by the separation blade on each side and the blade on the other side, the deformation of the blades under impact is small, and the head parts of the blades are fixed by the rocking handles and the rotating shafts, so that the two pairs of blade groups are prevented from flying out under impact.

The invention provides an intracranial balloon suction catheter which is characterized in that an outer tube is sleeved outside an inner tube, and the far end of the inner tube extends out of the far end of the outer tube; the near end of the balloon is connected to the far end of the outer tube, the far end of the balloon is connected to the far end of the inner tube, the reinforcing layer is located between the inner tube and the outer tube, and the length of the reinforcing layer is matched with that of the outer tube; the near ends of the inner tube and the outer tube are correspondingly connected with a catheter seat; the catheter seat is at least provided with a suction port corresponding to the inner cavity of the inner tube and a liquid supply port corresponding to the reinforcing layer; in response to supply of the filling medium to the liquid supply port, the filling medium passes through the filling channel to enable the balloon to be filled and then supported on the inner wall of the blood vessel, and the balloon is located at the part, extending out of the outer tube, of the far end of the inner tube, so that the size of the far end of the suction catheter is reduced, the suction catheter can extend into the blood vessel conveniently, and the suction catheter can enter the farther far end of the blood vessel; the far end of the suction catheter is supported by the balloon, so that the diameter of the blood vessel can be increased, and suction force of the suction catheter is increased.

The invention provides an optical lens, which comprises six lenses from an object side to an imaging surface along an optical axis: a first lens with negative focal power; the second lens has positive focal power; the third lens has positive focal power; the fourth lens has positive focal power, and the object side surface of the fourth lens is a convex surface; the object side surface of the fifth lens is a convex surface and the image side surface of the fifth lens is a concave surface or the object side surface of the fifth lens is a concave surface and the image side surface of the fifth lens is a convex surface; and the object side surface of the sixth lens is a concave surface, and the image side surface of the sixth lens is a convex surface. According to the optical lens provided by the invention, by optimizing the shape, focal power, thickness, spacing and the like of each lens, the imaging quality of the optical lens is improved, the aberration is reduced, the imaging quality of the optical lens is improved, and the optical lens has one or more advantages of small aperture, large image plane, miniaturization, long focal length and the like.

Temporary enclosure (1) for at least a part of a rotor blade connected to a wind power plant having a tower and a rotor top part, the enclosure (1) comprising; • A framework (2) • One or more walls (3) • a roof (4); said roof extends from said wall towards said blade; said framework (2) stretching said walls (3) said that a volume is enclosed below the roof (4) wherein said framework (2) comprising one or more frame parts (5), a connection (6) for connection of the one or more frame parts (5) and an activation means (7) for activation a change in the framework (2) whereby the volume enclosed by the enclosure (1) change.

The utility model discloses a bolt type fast mounting and dismounting inversely-mounted combined clamp applied to a spine endoscope, which comprises an inversely-mounted combined clamp and a handle with a mounting bin, the mounting bin is connected with a bin cover, after the bin cover is opened, the near end of a clamp rod of the inversely-mounted clamp is mounted in the mounting bin, then the bin cover is covered, and the inversely-mounted clamp can be used. And after the bin cover is opened, the flip-chip pliers can be taken out from the mounting bin, and quick disassembly is achieved. In a spine endoscopic surgery, particularly a lumbar fusion surgery, clinical needs to meet different conditions, such as a special instrument for resection treatment of soft tissue ligaments, intervertebral discs and vertebral plate joint sclerotin, a novel quick-assembly and disassembly handle and a forceps rod capable of being inversely mounted are adopted, so that the forceps head of the combined forceps does not need to pass through an endoscope, and the combined forceps can be larger in diameter and more convenient to use. The forceps are designed according to different treatment conditions, the use efficiency is higher, multiple forceps heads are combined on one handle, the forceps heads can be inversely installed or sequentially installed according to the sizes of the forceps heads, the forceps heads can be switched according to purposes during use, and clinical work is facilitated.

The utility model discloses an anti-blocking wire cutting water spraying plate, which comprises a plate body and a water inlet pipeline, the plate body is provided with a first wire penetrating hole for an electrode wire to penetrate through, the first wire penetrating hole comprises a first notch, the first notch extends outwards and forms a first wire inlet on the side wall of the plate body, and the first wire inlet is communicated with the first wire penetrating hole. A plurality of first wire penetrating holes are formed in the plate body, annular cavities surrounding the first wire penetrating holes are formed in the plate body, the annular cavities are communicated with a water inlet pipeline, the annular cavities are upwards communicated with the outside through first water outlets, the first water outlets are independent and designed to face the axes of the first wire penetrating holes, and the first wire penetrating holes are communicated with the water inlet pipeline. And cooling water sprayed from the first water outlet is used for cooling the electrode wire. The electrode wire cooling device is reasonable in structure, good in electrode wire cooling effect and favorable for prolonging the service life of the electrode wire.

A gallium nitride crystal, containing F in which a total content of halogen elements other than F is 1 / 100 or less of a content of F and including a main surface 1 having an inclination of 0 degrees or more and 10 degrees or less from a (000-1) crystal plane in which the main surface 1 is a specific main surface A satisfying at least one of the following conditions (A1) to (A3), has fewer specific crystal defects and is of high quality, in which a first line segment which is a virtual line segment extending in a first direction on the specific main surface A and having a length of 40 mm and a second line segment which is a virtual line segment extending in a second direction perpendicular to the first direction on the specific main surface A and having a length of 40 mm can be drawn, (A1) a facet growth region density in a random square region of 10 mm × 10 mm on the specific main surface A does not exceed 500 cm-2; (A2) at least one square region of 20 mm × 20 mm having a facet growth region density of less than 5 cm-2 is found in the specific main surface A; and (A3) a ratio of a total area of facet growth regions to an area of the specific main surface A (total area of facet growth regions / area of specific main surface A) is 40% or less.

A large-flow bag type filter element is characterized by comprising a lower shell, an upper shell, an outlet connecting seat, a filter element connecting disc and a plurality of inner filter elements, a liquid inlet is formed in the bottom of the lower shell, a liquid outlet is formed in the top of the upper shell, the outlet connecting seat is arranged at the top of an upper containing cavity and forms a channel communicated with the liquid outlet, the filter element connecting disc is connected with the outlet connecting seat, and the inner filter elements are arranged in the outlet connecting seat. A plurality of through holes communicated with the channel are formed in the filter element connecting disc, and the inner filter element is fixedly arranged below the filter element connecting disc and is correspondingly communicated with the through holes. The filter has the advantages of being simple in structure, reasonable in layout and capable of meeting the large-flow filtering requirement and prolonging the service life of products.

The present application discloses a display module and an electronic device, belonging to the field of communication technology. The display module includes: a touch layer, the touch layer includes N conductive strips, and N is a positive integer; wherein, at least one gap is provided on the conductive strip; the conductive strip includes a first end and a second end that are far away from each other, and at least one of the first end and the second end is connected to a feeding structure, and the feeding structure connected to the first end or the feeding structure connected to the second end is used to feed the conductive strip to generate electromagnetic waves. The technical solution provided by the present application can solve the problem of low sensitivity of the touch layer of the display module caused by the existing arrangement of the antenna on the screen.

The present invention discloses a novel radiator mainboard structure, comprising an outer frame and an inner plate, wherein the inner plate is connected with an outer convex mechanism on all sides, and a plurality of tube body mechanisms are distributed in a matrix on the inner plate, and the front and rear sides of the tube body mechanism are connected with a fourth arc frame located on the inner plate, and the first inclined frame, the second inclined frame and the third arc frame are connected with each other to form an annular groove, and the groove is located between the connection between the outer frame and the inner plate, and the protective plate is clamped in the groove of the radiator mainboard by adding the groove on the side, and the protective plate can be well connected together through the setting of the groove, so as to achieve better sealing effect, and the setting of the first inclined frame, the second inclined frame and the third arc frame has high elasticity, and the protective plate can be installed so that the outer frame can be deformed to a certain extent, so that its flexibility is improved, and its strength is improved, so that the air inlet diameter of the strip pipe opening of the radiator mainboard is increased, and the air outlet diameter is reduced, so that the flow of wind speed is accelerated, and the negative pressure effect is improved.

The utility model discloses a 24-hour urine collection barrel for urine detection, belongs to the field of medical auxiliary supplies, and is particularly suitable for departments needing to collect 24-hour urine protein clinically. Comprising a barrel body and a detachable barrel cover installed at the top, a stirring mechanism used for stirring urine is arranged in the barrel body, the top of the stirring mechanism is connected with a telescopic assembly, a through groove used for allowing the telescopic assembly to penetrate out is formed in the barrel cover, a pressing and containing assembly is arranged at the through groove, and the top, penetrating out of the through groove, of the telescopic assembly is connected with a positioning assembly; when the telescopic assembly is in a retracted state, the positioning assembly is clamped in the pressing and containing assembly, and when the telescopic assembly is in an extended state, the positioning assembly is separated from the pressing and containing assembly. Through the arrangement of the stirring mechanism and the telescopic assembly, urine can be conveniently stirred under the condition that the barrel cover is not opened, other additional medical articles do not need to be used, the medical cost is saved, operation is convenient, and the infection risk is reduced.

The application provides an antenna, a circuit board and an electronic device. The antenna comprises a first radiator and a second radiator arranged on a substrate. The substrate has a first structure layer and a second structure layer. The first structure layer is provided with a first hollow area, and the second structure layer is provided with a second hollow area. The first radiator is arranged in the first hollow area, and the second radiator is arranged in the second hollow area. The first radiator and the second radiator are arranged in a spaced manner along the thickness direction of the substrate. The substrate further has a ground layer. Two ends of the second radiator are connected to the ground layer for grounding. The first radiator is provided with a first gap, and a first end of the first radiator is connected to the ground layer for grounding. The antenna can effectively increase the aperture of the radiator, so that the magnetic field distribution of the antenna is more uniform, thereby effectively reducing the required clearance area of the antenna under the condition of meeting the same antenna performance, and further helping the miniaturization of the electronic device.