68results about How to "Short switching time" patented technology

This application discloses a five-roll embossing machine, including a machine body, an embossing assembly, a paper feeding assembly, a main drive assembly, and a pressing roller. The embossing assembly includes five embossing rollers, a pair of main gears, and a pair of positioning assemblies. The pair of main gears are rotatably mounted on both sides of the machine body and driven to rotate by the auxiliary drive assembly. Each embossing roller is provided with a quick-release assembly at both ends. The quick-release assembly includes a bearing groove, a toothed cover, several pressure covers, and a fastening assembly. The fastening assembly achieves simultaneous locking of all pressure covers and toothed covers by a single bolt operation through a linkage. The main drive assembly drives the working position embossing roller and the pressing roller to rotate synchronously. The positioning assembly performs precise circumferential positioning of the main gears. This invention solves the problems of cumbersome roller changing, long time consumption, and low positioning accuracy of existing embossing machines, realizes quick roller changing by a single person and seamless switching of five patterns, and greatly improves production efficiency and equipment versatility.

The utility model belongs to the field of line drawing and seeding in the grassland industry, in particular relates to a line drawing and seeding device for the grassland industry, and aims to solve the problems that the conventional line drawing device can only draw lines in the use process, needs different devices in the seeding process, is tedious, time-consuming and troublesome to operate, and cannot flexibly adjust the angle of a pushing handle. The device comprises a bottom plate, moving wheels convenient to move are installed on the two sides of the bottom plate, universal wheels convenient to steer are fixedly arranged on one side of the bottom of the bottom plate, a fixing plate is fixedly arranged on the top of the bottom plate, the top end of the fixing plate is in a U shape, and the inner walls of the two sides of the fixing plate are rotationally connected with the same rotating shaft; by means of the sowing mechanism and the line drawing machine, line drawing and seed sowing can be achieved, double functions are achieved, the practicability is improved, meanwhile, the equipment switching time is shortened, the working efficiency is improved, the angle of the pushing handle can be adjusted and fixed through the rotating shaft and the fixing mechanism, and therefore different persons can push the pushing handle conveniently.

The embodiment of the invention provides a control method of swimming pool cleaning equipment and the swimming pool cleaning equipment. Relates to the technical field of cleaning equipment control. The swimming pool cleaning equipment comprises a power assembly and a buoyancy adjusting assembly. The buoyancy adjusting assembly comprises a fluid exchange port. The control method comprises the steps that in response to a floating instruction, the power assembly is controlled to operate in a first working state so as to drive the swimming pool cleaning equipment in water to move towards the water surface; under the condition that the swimming pool cleaning equipment is not exposed out of the water surface, the buoyancy adjusting assembly is started, and the buoyancy adjusting assembly continuously operates until the swimming pool cleaning equipment floats on the water surface; when the swimming pool cleaning equipment is immersed in the water, the swimming pool cleaning equipment and the external water body are subjected to fluid exchange through the fluid exchange port; and after the fluid exchange port moves to be exposed out of the water surface, external air is introduced into the swimming pool cleaning equipment through the fluid exchange port. According to the method, rapid switching between the under-pool cleaning mode and the water surface cleaning mode is achieved, and the overall efficiency of cleaning operation is improved.

The utility model belongs to mould technical field especially is a kind of multi-product common die structure, including lower bolster plate, the upper surface both sides of lower bolster plate are all fixedly connected with lower foot pad, the top of lower foot pad is fixedly connected with lower die holder, the upper surface of lower die holder is installed with lower backing plate, the upper surface of lower backing plate is fixedly connected with guide pillar.The utility model can be punched to product one by the setting of drawing punch, punching punch, chamfering punch, ejector pin one and ejector pin two, and it can be replaced design, can be replaced as drawing punch two, punching punch two, chamfering punch two, ejector pin five and ejector pin six, so as to be able to punch to product two, so as to realize when switching product without overall replacement mould, greatly shorten product switching time, improve production flexibility, also greatly improve the reuse rate of mould, reduce equipment investment and cost.

The utility model discloses a head embedded sleeve mould, including first sleeve mould and second sleeve mould, first sleeve mould includes first mould cover, first mould core, and second sleeve mould includes second mould cover, second mould core, the first mould core of first sleeve mould is sleeved in the second mould core of second sleeve mould, the first mould cover of first sleeve mould is sleeved in the second mould cover of second sleeve mould, between the guide material cone of first mould core and the guide material cone of second mould core, between the guide material cone hole of first mould cover and the guide material cone hole of second mould cover respectively form smooth guide material cone transition surface and cone hole transition surface, and form melt channel between guide material cone transition surface and cone hole transition surface. Adopt this scheme, can choose sleeve mould specification according to the extrusion specification, do not involve the dismounting problem of complex head in the specification switching process, only need to dismount embedded sleeve mould in the specification switching process. The head nested sleeve mould with the structure can effectively save the head switching time, can improve production efficiency greatly, saves production cost.

The invention discloses a four-door two-cover flexible trimming die switching system, and relates to the technical field of automobile manufacturing equipment.The four-door two-cover flexible trimming die switching system comprises a lightweight trimming die unit and a switching mounting base, and the lightweight trimming die unit is detachably mounted on the switching mounting base through a robot grabbing device; the bottom of the light-weight edge rolling die unit is provided with a gun changing disc butt joint part, and the switching installation base is provided with an electric quick-plug device and a positioning locking device which are matched with the gun changing disc butt joint part. According to the invention, a split type framework of the lightweight trimming die unit and the switching mounting base is adopted, and a full-automatic die switching system is constructed through a robot automatic grabbing and gun changing disc rapid butt joint technology. A gun replacing disc butt joint part arranged at the bottom of the die body, an electric quick-plug device of the base and a positioning locking device form a standard interface, and a robot is matched for accurate grabbing and positioning, so that the die replacing process is optimized from traditional manual hoisting calibration to machine autonomous recognition butt joint.

The utility model discloses a kind of CNC arc drawing devices for lamp and ornament picture processing, including conveyer and support frame, the outside of the conveyer is provided with support frame, the top of the conveyer is provided with multiple groups of lamp and ornament picture board, the top of the support frame is installed with Z direction screw rod moving assembly, the output of Z direction screw rod moving assembly is installed with X direction screw rod moving assembly, the output of X direction screw rod moving assembly is installed with support arm, Y direction screw rod moving assembly is installed on the side wall of support arm.The utility model not only realizes that CNC arc drawing device is conveniently operated in multiple position moving position, facilitates assembly line type conveying fast operation, shortens the time between each group switching, improves the efficiency of CNC arc drawing device operation, and avoids the deviation shaking during processing, improves the convenience of CNC arc drawing device to workpiece center positioning clamping.

The utility model relates to the technical field of PIN switches, and particularly discloses a 1G-40G broadband single-pole eight-throw switch, which comprises a plurality of microwave signal input ends, a microwave signal output end, a PIN switch, a plurality of feed circuits and a driving circuit, and is characterized in that the output ends of the feed circuits are respectively connected with the input ends of the PIN switch and the microwave signal input ends; the input end of the feed circuit is connected with the output end of the drive circuit, and the output end of the PIN switch is connected with the microwave signal output end; the driving circuit comprises a driver, a resistor and a capacitor, the input end of the driver is connected with an external control TTL signal, the positive power supply pin of the driver is connected with a positive power supply, the negative power supply pin of the driver is connected with a negative power supply, and the output end of the driver is connected with one end of the resistor and one end of the capacitor. The input end of the feed circuit is connected with the other end of the resistor and the other end of the capacitor. The problems that an existing switch is narrow in coverage frequency, high in cost and slow in switching time are solved.

The application discloses an improved deadbeat control method for reducing switching loss, and is implemented according to the following steps: step 1, modeling a single-phase circuit of an MMC, and meanwhile, establishing a single-phase upper and lower bridge arm node current equation; step 2, discretizing the established equation, and taking a ring current as a reference quantity to establish a deadbeat control system; step 3, collecting voltages of upper and lower bridge arms of each phase of the MMC and discriminating voltage discretization; step 4, operating the upper and lower bridge arm voltages output by step 2 to obtain the number of sub-modules that should be turned on for each phase of the upper and lower bridge arms of the MMC in the next control period; and step 5, sorting each sub-module voltage of each phase after being processed in step 3, and meanwhile, turning on or turning off specific sub-modules according to the number of sub-modules that should be turned on for each phase of the upper and lower bridge arms in the next control period obtained in step 4. The application can improve system dynamic performance, improve output voltage quality and reduce the number of times of turning on sub-modules of the system.

The application relates to the technical field of relays, in particular to a novel magnetic latching relay which comprises a shell, a contact mechanism fixedly installed in the shell, the contact mechanism comprising a first static foot and a second static foot, the first static foot and the second static foot being fixedly installed on one side in the shell, a first static contact being fixedly installed on the first static foot, a second static contact being fixedly installed on the second static foot, a rotating mechanism being rotatably connected to one side in the shell and located between the first static foot and the second static foot, two dynamic contacts being fixedly installed on the rotating mechanism and used for cooperating with the first static contact and the second static contact to realize circuit on-off, a pushing assembly being fixedly installed in the shell and used for driving the rotating mechanism to rotate, and an electromagnetic assembly being fixedly installed in the shell and used for driving the pushing assembly, through rotation of the rotating mechanism, the two dynamic contacts on the rotating mechanism are respectively attached to the first static contact and the second static contact, the single-contact stroke is shortened, and the working efficiency of the device is improved.

The present application relates to the field of asphalt mixture production equipment, and discloses an asphalt mixture stirring production equipment with heat energy recovery and a production method, the production equipment comprises a regenerated drying roller, a primary drying roller, a dust removal system, a preheating system, a cyclone dust collector and an incinerator; the gas outlet end of the regenerated drying roller is connected with the gas inlet end of the cyclone dust collector, the gas outlet end of the cyclone dust collector is connected with the incinerator, the incinerator is connected with the gas inlet end of the preheating system; the gas outlet end of the preheating system and the gas outlet end of the primary drying roller are both connected with the dust removal system, and the discharge end of the preheating system is connected with the feeding end of the primary drying roller.The present application has the following advantages: the high-temperature tail gas heat energy discharged from the incinerator can be converted into preheating energy of the primary aggregate, so that the tail gas pollution problem is solved thoroughly, the energy recycling is realized, and the equipment energy consumption and operation cost are effectively reduced.

The invention relates to the technical field of steel and iron material rolling, and particularly discloses a full-process production method for rolling a high-performance bar with the diameter phi of 36 mm. Three-stage temperature dynamic regulation and control are conducted, specifically, a steel billet with a configured component system is fed into a heating furnace, and a rough rolling-intermediate rolling-finish rolling dynamic temperature control model is constructed; according to the multi-specification compatible composite hole pattern, a flat ellipse-round-square composite hole pattern sequence is adopted; differentiated intelligent cooling is conducted, specifically, a controlled cooling process database is built, and cooling schemes are formulated according to different steel grade components; multi-dimensional online quality detection: laser diameter measurement and AI metallographic detection are integrated, a laser diameter measurement instrument is additionally mounted at a finish rolling outlet, and a rapid metallographic detector is deployed at a cooling bed outlet; loop parameter control: establishing a loop height dynamic compensation model, and solidifying a loop control program through a PLC system; the product comprehensively meets the requirement of high-end equipment manufacturing for high-performance bars, the equipment idleness and production cost are greatly reduced, the production stability is greatly improved, and the production efficiency is improved.

The utility model relates to the technical field of camera shell assembly clamps, and discloses a quick-change camera shell assembly clamp which comprises a clamp seat, a forward clamping structure and a reverse clamping structure, the forward clamping structure is located in a forward area, the reverse clamping structure is located in a reverse area, the forward clamping structure comprises a plurality of forward clamping columns and a plurality of forward clamping plates, the forward clamping columns are in butt joint with the clamp seat, and the forward clamping plates are in butt joint with the clamp seat. The positive clamping column and the positive clamping plate are used for clamping a camera shell in a positive state; the reverse clamping structure comprises a plurality of reverse clamping blocks and reverse clamping strips, reverse clamping grooves are formed between the reverse clamping blocks and the reverse clamping strips, and the reverse clamping blocks and the reverse clamping strips are used for clamping and fixing the camera shell. The clamp base is directly assembled on CNC equipment, and the camera shells in the forward state and the reverse state are machined in batches through the CNC equipment; thus, the standby time of CNC equipment is shortened, the machining efficiency of the camera shell is improved, meanwhile, the machining requirements of different procedures are met, the switching time of the forward state and the reverse state of the camera shell is shortened, and the machining efficiency of the camera shell is greatly improved.

The utility model relates to the related technical field of fluororubber sealing ring production, in particular to a fluororubber sealing ring vulcanization mold based on quick mold change, which comprises a first mold shell and a second mold shell which are arranged on a workbench, and the first mold shell is matched with the second mold shell; a rotating part is arranged at the side end of the first mold shell; the self-locking driving piece is arranged at the side end of the first mold shell and connected with the rotating piece, the self-locking driving piece is manually pressed, so that the locking work of the self-locking driving piece on the rotating piece is relieved, and the self-locking driving piece rotates relative to the first mold shell when being pressed to the stroke end so as to drive the rotating piece to synchronously rotate; the side end of the first mold shell is conducted so that the mold plate can be rapidly disassembled and installed in the first mold shell, after the mold plate is installed, the self-locking driving piece is controlled to reset so that the locking state of the rotating piece can be restored, and stable connection of the mold plate and the first mold shell is guaranteed.

The application discloses a cluster switching method and device, equipment and a storage medium, and relates to the technical field of computers. The method comprises the following steps: acquiring domain name information, and parsing the domain name information to obtain corresponding parsing information; acquiring current cluster structure information corresponding to a pointing cluster based on the parsing information; judging whether all nodes in the pointing cluster are unavailable based on the cluster structure information and a preset node alive judging method; and if all the nodes in the pointing cluster are unavailable, switching the pointing cluster of the domain name information. The application controls the current pointing cluster through domain name information, and reanalyzes the domain name information to switch the cluster when all the nodes are unavailable, thereby simplifying the development process, improving the convenience of switching the cluster, and improving the availability of the system.

The utility model discloses a conveying and sorting mechanism, it includes mounting panel and set up on the conveying unit of mounting panel, the conveying unit includes the belt that conveys along the length direction of mounting panel, the bottom of mounting panel is provided with the accommodation groove that extends along the length direction, be provided with a plurality of adsorption board that connect in succession in the accommodation groove, the adsorption board is located above the belt conveying surface, be provided with a plurality of air inlet on the mounting panel, the front and back both sides of adsorption board all are provided with a plurality of air outlet, the adsorption board inside is provided with the gas passage that is linked with air inlet, air outlet each other, the bottom of adsorption board is provided with a plurality of first adsorption hole and a plurality of second adsorption hole that link with the gas passage. The utility model adopts the mode of adsorption conveying, has reduced gas switching time, has improved adsorption efficiency, has improved conveying rhythm significantly.

The utility model discloses a kind of folding pedestrian bridges for coal mine underground, it is related to coal mine underground auxiliary device technical field.The purpose is to solve the problem of existing bridge and monorail vehicle interference, switching efficiency is low.It includes fixed step, bridge body platform, foldable platform and foldable step mechanism;Fixed step is fixedly connected with bridge body platform, foldable platform is hinged with bridge body platform by hinge, and is equipped with support rod and bolt locking;Foldable step mechanism contains triangular column and folding step assembly, and can be quickly folded or unfolded.The utility model can realize efficient switching without disassembly, save space after folding to avoid with monorail vehicle interference, realize pedestrian safe passage after unfolding, realize the efficient switching of pedestrian safe passage and barrier-free transport of monorail vehicle.

The invention relates to a steam source automatic switching control method based on multi-parameter collaborative decision, and the method achieves the online precise recognition of a switching trigger condition through an automatic judgment mechanism based on multi-parameter collaborative decision, automatically judges the preheating completion state of a pipeline, and overcomes the limitations that a conventional control method depends on human experience, and is single in monitoring parameter. On the basis, a smooth valve control instruction is generated by utilizing the control targets of automatic step sequence, dynamic balance switching speed and process smoothness combined with intermittent control and cooperative adjustment, and accurate cooperative adjustment of the main steam source valve and the standby steam source valve is achieved. According to the method, on the premise that the pressure, the temperature and the water level of the deaerator are stable, the steam source switching time is remarkably shortened, parameter fluctuation in the switching process is reduced, and the flexibility and the safety of a unit to cope with start-stop peak regulation and deep peak regulation working conditions are improved.

This utility model belongs to the field of medical device technology and discloses a bridging device and endoscope system for endoscopes. The bridging device includes a main structure and a valve body. The main structure has an inlet channel, a first outlet channel, and a second outlet channel. The inlet channel is connected to the endoscope, and both the first and second outlet channels are connected to a sampling device. The valve body is movably mounted on the main structure and has a connecting chamber with a protrusion. In the suction mode, the protrusion blocks the inlet of the second outlet channel, and the inlet channel is connected to the first outlet channel in the connecting chamber, allowing liquid to be delivered to the sampling device via the first outlet channel. In the sampling mode, the protrusion blocks the inlet of the first outlet channel, and the inlet channel is connected to the second outlet channel in the connecting chamber, allowing liquid to be delivered to the sampling device via the second outlet channel. The protrusion significantly reduces the time for mode switching, minimizes flow rate loss, and reduces the impact of mode switching on the amount of liquid in the sampling device.

The utility model discloses a switching assembly for feeder, including equipment frame, the equipment frame includes top frame and vertical frame, the vertical frame is two groups, and two groups of vertical frame symmetrical installation are in the front end of top frame, and vertical frame and top frame fixed connection, still fixed mounting of two groups of vertical frame has the feeding box group, the positive below of feeding box group is installed with the material guide shell, both sides fixed mounting of material guide shell are in the inside surface of vertical frame, and the lower end rotation of material guide shell is installed with switching disc group, still fixed mounting of material guide shell has the drive motor of drive switching disc group rotation. The application can realize the switching of first discharge pipe, second discharge pipe and third discharge pipe fast through drive motor drive switching disc group rotation, and the switching time of material feeding is greatly shortened, and the production efficiency is improved. The detachable connection mode between discharge pipe and switching disc group, feeding box group and vertical frame etc. parts makes when needing to install, dismount, clean or maintain the component.

This application relates to the field of hydraulic pump technology, specifically to an oil circuit on / off control device. The oil circuit on / off control device of this application includes a valve seat, a valve body, a valve core, a spring, and two electromagnets. The two electromagnets are located on the left and right sides of the valve seat, respectively. The valve body is fitted into the valve seat, and the valve core is installed in the valve body. Both ends of the valve core pass through the valve body and the valve seat, which are located within the electromagnet area. Springs are wound around both ends of the valve core within the valve seat. Pre-set connecting channels within the valve core precisely distribute oil flow to the radial holes of the valve body. When the electromagnets drive the valve core to move left and right, the connection and disconnection of the oil inlet and the target outlet are completed synchronously, eliminating the oil circuit interruption window of traditional serial valve opening and closing. This device integrates oil inlet distribution, outlet selection, and return oil management functions into a coaxially nested valve seat-valve body-valve core assembly, eliminating intersecting external pipelines, achieving high integration, and reducing the size of the device.

The invention belongs to the field of power semiconductor devices, and particularly discloses a low-loss IGBT chip with a compensation type floating P region and a preparation method of the low-loss IGBT chip. According to the invention, the N-CS layer is formed in the floating P region, the N-CS layer forms a hole barrier when the device is conducted, the hole concentration of the emitter side is increased by the floating P region, electron injection of the emitter side is enhanced in order to maintain electric neutrality, and the on-state voltage drop can be effectively reduced. In the switching process, the N-CS layer and the floating P region are mutually depleted, the expansion time of a depletion layer is shortened, and the switching time of the device is shortened. The switching loss can be reduced while the low on-state voltage drop of the device is maintained, and the on-state voltage drop and the switching loss are effectively balanced. An N-type layer is introduced into a floating P region, and the original maximum electric field is reduced due to positive charges provided by N-CS, so that the reduction of the electric flux of the traditional floating P region, the reduction of a concentrated high electric field near a groove, the protection of a gate oxide layer at the bottom of the groove and the improvement of the blocking voltage of the device are facilitated.

This utility model relates to the technical field of camera housing assembly fixtures, and discloses a double-headed camera housing assembly fixture, including a fixture base, a positive clamping structure, and a negative clamping structure. The positive clamping structure includes multiple locking pins and multiple positive pressure blocks. The locking pins extend through the positive pressure blocks and are threadedly connected to the fixture base. The interiors of both ends of the positive pressure blocks are used to press against the camera housing in an upright position. The fixture base has multiple negative clamping grooves, and the negative clamping structure includes multiple negative clamping blocks. The negative clamping grooves have groove walls, and the groove walls and negative clamping blocks are used to clamp the camera housing in an inverted position. During CNC machining, the camera housing is loaded and clamped simultaneously. After the CNC machining is completed, the fixture base is directly assembled onto the CNC machine, reducing the standby time of the CNC machine, improving the machining efficiency of the camera housing, and meeting the machining requirements of different processes. It also helps to reduce the switching time between the upright and inverted positions of the camera housing, greatly improving the machining efficiency of the camera housing.

The application discloses a threshold value adjustable vertical double diffusion metal oxide semiconductor field effect transistor, which comprises a drift region, a body region formed in the drift region from the upper surface of the drift region downwards, a gate oxide layer formed on the upper surfaces of the drift region and the body region, and a PN junction composite polysilicon gate formed on the upper surface of the gate oxide layer and composed of a first type polysilicon and a second type polysilicon, wherein the second type polysilicon covers all surfaces of the first type polysilicon except the bottom, and the vertical projection of the PN junction junction boundary formed by the first type polysilicon and the second type polysilicon is located in the body region in the channel region. When the transistor is turned on, the PN junction composite polysilicon gate is in a reverse bias state, and the threshold voltage is raised by affecting the inversion process of the body region through the junction electric field. The application realizes the raising of the threshold voltage of the device without weakening other performances of the device, and does not change the core gate oxide process and need to cooperate with a groove structure.

The invention discloses an improved process for rapid forming of a die, which relates to the field of forming dies and comprises the following steps: step 1, plate preparation and feeding positioning: a to-be-stamped plate is stably placed on a placing plate above a base, so that the stamping part of the plate covers the upper part of a forming cavity of a lower die; 2, die replacement and adaptive locking are carried out; thirdly, punch forming is conducted, a hydraulic cylinder is started, the telescopic end of the hydraulic cylinder pushes the upper die to synchronously move downwards through a connecting block, and punch forming is conducted on the plate; fourthly, stripping and die replacement preparation is conducted, after stamping is completed, the formed part is stripped from a lower die cavity through a stripping structure of the lower die, and the formed part is taken down; and if the specification of the mold needs to be replaced, unlocking and replacing operation in the second step is repeated, and adaptation preparation of next-time forming is completed. According to the method, the dimensional deviation and surface flaws of the formed part caused by upper mold deviation are eliminated from the source, the mold replacement adaptation process is simple, and the rapid forming precision and efficiency of the mold are remarkably improved.

This invention provides a torque angle logic control method and control system, a rolling connection device, a storage medium, and an electronic device. The method includes: employing an independent angle control method, setting a target angle for the motor spindle during the rolling process, acquiring the real-time angle of the motor spindle during the rolling process, and controlling the operation of the motor spindle of the rolling connection device based on the real-time angle and the target angle; when the real-time angle reaches the set target angle during the rolling process, the motor spindle of the rolling connection device automatically reverses and exits. This invention effectively ensures the stability and consistency requirements of the product and meets the expected service life of the product.

This utility model relates to the field of powder material packaging technology, and discloses an intelligent pre-made thickener dust-free packaging device, including a material conveying system, a metering and packaging system, a sealing and conveying system, and a control system. The material conveying system consists of a buffer silo, a vacuum feeder, a receiver, an air source pump, and a Roots pump. The receiver is connected to an external finished product silo, and the vacuum feeder conveys the powder material to the buffer silo in a sealed manner. The metering and packaging system includes a lifting bottom-fill packaging machine, a weighing module, and a bag clamping device. The bag clamping device fixes the packaging bag and seals it with the outlet of the lifting bottom-fill packaging machine. The weighing module is located below the packaging bag and measures in real time. The sealing and conveying system consists of an automatic seam heat sealer and a conveyor, with the conveyor sequentially connecting the metering and packaging system and the automatic seam heat sealer. In this utility model, the entire process is sealed, resulting in a low dust emission rate and a low dust concentration in the workshop, meeting environmental protection requirements.

This application provides a compact polarization filter switching device, belonging to the field of optical and optomechanical technology. Specifically, it includes: a base; a switching frame rotatably mounted on the base, on which a polarizer and a filter are mounted. The axes of the polarizer, the filter, and the rotation axis of the switching frame are parallel and spaced apart, and the polarizer and filter are also spaced apart; a first driving mechanism mounted on the base, used to drive the switching frame to rotate relative to the base, so that the polarizer or filter is located in the optical path of the optical system; wherein, the polarizer is mounted on the switching frame via a rotating ring, and the rotating ring is rotatably mounted on the switching frame via a bearing; the switching frame is provided with a second driving mechanism for driving the rotating ring to rotate, used to adjust the angle of the polarizer. Through the processing scheme of this application, rapid switching of polarization filtering function is achieved, while simultaneously adjusting the angle of the polarizer.