38results about How to "Meet design needs" patented technology

The utility model relates to the technical field of folding tables, in particular to a foldable picnic table which comprises a table frame and a table top installed above the table frame. The two sides of the table frame are rotationally connected with foot stools, and the foot stools are unfolded and fixed to the table frame through locking assemblies and can be folded below the table frame; wherein the foot stool is provided with at least one folding position, the folding position is rotatably connected with a stool surface, and the stool surface is unfolded and fixed with the foot stool through a telescopic locking assembly and can be folded at the front end of the folding position; the picnic table provided by the utility model can meet the design requirements of two people and four people, the independent folding function of the stool surface and the inner and outer foot stools is realized by skillfully utilizing the outer inclined angles of the table legs, a user can directly use the picnic table without additional assembly, and the convenience and the operation convenience of the picnic table are greatly improved.

The application relates to the technical field of heating equipment, and provides a heating air outlet device and a bathroom heater. The heating air outlet device comprises a mounting bracket and a heating module. A plurality of mounting cavities are formed in the mounting bracket, and the mounting cavities form air passing channels for external airflow to pass through. The heating module comprises a plurality of heating blocks. The plurality of heating blocks are respectively and correspondingly mounted in the plurality of mounting cavities along a first direction, and the plurality of heating blocks are arranged in a staggered manner along the first direction. The mounting heights of at least two heating blocks along the first direction are different. The heating air outlet device provided by the application can construct heating structures with different shapes according to requirements, and the mounting heights of the heating blocks can be correspondingly set according to the air volume before the air enters the respective mounting cavities, so that the heat exchange efficiency of airflow and the corresponding heating blocks in the part with relatively small air volume is improved, and the problem of poor local heat dissipation effect of the heating air outlet device is solved.

The invention relates to the technical field of mechanical transmission and mechatronics, in particular to an integrated linear servo joint thermal magnetic multi-physics coupling design method based on Ansys Workbench, which comprises the following steps: establishing a three-dimensional model of a reverse planetary roller screw; constructing an electromagnetic model of the motor, and performing electromagnetic simulation; internal heat and convective heat transfer coefficients corresponding to the motor are obtained; the heat flow, the heat flux and the convective heat transfer coefficient corresponding to the reverse planetary roller screw are obtained; and constructing a thermal magnetic coupling model, and performing simulation solution. According to the method, the heat, force and magnetic multi-physical field coupling effect is comprehensively considered in the integrated linear servo joint, and the problem that the overall performance of the whole joint is reduced due to the fact that the temperature is too high due to improper design is effectively solved.

The utility model provides a baseball cap with replaceable Velcro decorations, which belongs to the technical field of baseball caps and comprises a baseball cap body, decorative cloth is adhered to the front end of a cap crown of the baseball cap body through Velcro, a decorative frame is integrally connected to the middle of the decorative cloth, and a plurality of symbol card papers are magnetically connected to the inside of the decorative frame. According to the baseball cap, the decorative cloth adheres to the front end of the cap crown through the hook-and-loop fasteners, each piece of decorative cloth is provided with the corresponding pattern face, a user can replace the decorative cloth according to personal preferences, operation is more flexible in daily use, various patterns can be selected, the multiple pieces of symbol card paper can be connected into the decorative frame in a magnetic attraction mode, and therefore the baseball cap is more attractive in appearance. The symbol card paper comprises letters, numbers, Chinese characters and the like, a user can permutate and combine into a string of symbols in a personalized mode, the design requirements of the user can be met, and the using pleasure can be improved.

This application provides a seat foam and a seat. The seat foam includes a foam A-side, which is the side of the foam closest to the occupant. A functional area is disposed on the foam A-side, and the functional area has at least one transition surface, which is a small plane with an angle A greater than or equal to 90 degrees to the foam A-side. A preset area is used to configure a sheet-like occupant sensing device, and the preset area is the orthographic projection area of ​​the sheet-like occupant sensing device on the foam A-side. A stress concentration area is a stress radiation area that overlaps with the functional area and the preset area. A stress relief part is a cut located in the stress concentration area, at the junction of the foam A-side and the transition surface outside the preset area, for stress relief. This solution uses a cut to release stress in the stress concentration area, which not only ensures the flatness of the seat when sitting, but also releases stress protection elements in a timely manner, achieving the dual effect of meeting both seat design requirements and user experience requirements.

The present application relates to a ceramic substrate structure for replacing white glue and gold wire, a manufacturing process thereof and an LED whole board structure, the ceramic substrate structure comprising: an upper ceramic substrate assembly and a lower ceramic substrate assembly, the upper ceramic substrate assembly comprising a support substrate, a fluorescent sheet and an LED chip, the support substrate being horizontally arranged, the fluorescent sheet being distributed on the lower side surface of the support substrate, and the LED chip being distributed on the lower side of the fluorescent sheet and on the lower ceramic substrate assembly, the present application has the advantages of compact structure and reasonable design, the upper ceramic substrate is used to replace the functions of white glue and gold wire, the fluorescent film and the chip are accommodated, and then the lower ceramic substrate is combined, the normal manufacturing process is changed into reverse manufacturing, the tin and glue can be quickly applied through the scraping mask plate scraping glue method, the complicated time and multi-step equipment, raw materials and labor of the white glue and gold wire part are saved, and the manufacturing efficiency is greatly improved.

The present disclosure relates to the technical field of infrared detection, and particularly relates to an amorphous silicon infrared detector pixel, a chip, a movement and equipment, the amorphous silicon infrared detector pixel comprising an absorption sensing part; the absorption sensing part comprises an amorphous silicon thermal sensitive layer and a metal electrode layer; the amorphous silicon thermal sensitive layer comprises a thermal sensitive working area and a non-thermal sensitive working area, the thermal sensitive working area has a first thickness, the non-thermal sensitive working area has a second thickness, the first thickness is greater than the second thickness, and the effective value of the second thickness is less than 2000 angstroms; the metal electrode layer is in contact with the non-thermal sensitive working area and at least the side surface of the thermal sensitive working area; wherein an adjacent pair of metal electrode layers located on the side surface of the thermal sensitive working area form quasi-parallel electrodes. Thus, the first thickness of the amorphous silicon thermal sensitive layer in the thermal sensitive working area is greater than the second thickness of the non-thermal sensitive working area, the thickness of the amorphous silicon thermal sensitive layer between the quasi-parallel electrodes is relatively thick, noise can be reduced, and the performance of the device is improved.

The present disclosure relates to the technical field of infrared detection, and particularly relates to an amorphous silicon infrared detector pixel, a chip, a movement and equipment, the amorphous silicon infrared detector pixel comprising an absorption sensing part; the absorption sensing part comprises an amorphous silicon thermal sensitive layer and a metal electrode layer; the absorption sensing part comprises a thermal sensitive working area and a non-thermal sensitive working area, the amorphous silicon thermal sensitive layer is located in the thermal sensitive working area, the amorphous silicon thermal sensitive layer in the thermal sensitive working area has a target thickness, the thickness of the amorphous silicon thermal sensitive layer in the non-thermal sensitive working area is zero, the thermal sensitive working area generates resistance change in response to a received thermal signal; the metal electrode layer is located in the non-thermal sensitive working area and at least contacts the side surface of the thermal sensitive working area; wherein, an adjacent pair of metal electrode layers located on the side surface of the thermal sensitive working area form quasi-parallel electrodes. Thus, by setting the thickness of the amorphous silicon thermal sensitive layer in the non-thermal sensitive working area to zero, noise is greatly reduced, heat capacity is greatly reduced, thermal response time is shortened, and device performance is improved.

An electrical interconnect structure and its formation method, as well as a panel-level packaging structure, are disclosed. The electrical interconnect structure includes: several conductive structures, the surfaces of which have been roughened to form micro-pit structures; and a molding compound layer covering the sidewalls of the conductive structures. The roughened sidewalls of the conductive structures form micro-pit morphologies. This three-dimensional porous structure significantly increases the actual contact area between the conductive structures and the molding compound layer, enabling a tight mechanical bond at the interface of the two dissimilar materials. After the molding compound layer completely covers the roughened sidewalls of the conductive structures, the molding compound material is embedded within the micro-pit structures, generating a significant anchoring effect and effectively suppressing interface delamination. When the packaging structure experiences temperature changes or is subjected to external mechanical loads, the increased interfacial adhesion can uniformly disperse stress, preventing excessive stress concentration at the interface between the conductive structures and the molding compound layer, thereby preventing the generation and propagation of cracks and significantly improving the long-term reliability and failure resistance of the packaging structure.

The present application provides a sunlight-resistant colored electrochemical energy storage fabric based on recycled cotton powder and a preparation method thereof, belonging to the technical fields of flexible electronic textiles and electrochemical energy storage. The preparation method first deposits a TiO2 film on the recycled cotton powder by ALD technology, and then performs mild hydrothermal synthesis to obtain a TMOs@TiO2@CP composite powder with a three-layer nested structure. Among them, the TiO2 film protects the internal recycled cotton powder from erosion during the hydrothermal reaction and is tightly combined with the TMOs functional layer through Ti-O-TM covalent bonds, improving the structural stability and interfacial bonding force of the composite powder. The present application uses the inherent color characteristics of different transition metal oxides to replace traditional black carbon-based materials, endowing the energy storage fabric with rich color choices and meeting the aesthetic and design requirements of high-end textiles. The process route of the present application avoids the damage to the inherent flexibility and structure of cotton fabrics by drastic means such as high-temperature carbonization.

This application provides a display panel and display device, including: a display area, a first non-display area, and a second non-display area. The display area surrounds the first non-display area, and the second non-display area surrounds the display area. The display panel includes multiple touch electrodes, and the first non-display area is provided with multiple first touch terminals. Touch signal lines are electrically connected to the first touch terminals and the touch electrodes. Touch signals can be transmitted using the touch electrodes in the touch layer, and then transmitted to the first touch terminals disposed in the first non-display area via the touch signal lines. The first non-display area has sufficient design space to accommodate multiple first touch terminals, enabling various design requirements for the touch terminals. Furthermore, placing the touch terminals in the first non-display area can additionally increase the number of touch terminals, and the size of the touch terminals is not limited by narrow steps. This satisfies the display panel's design requirements for narrow steps in multiple directions without affecting the display effect of the display panel.

The utility model discloses a prefabricated wallboard of integrated electrical pipeline, including prefabricated wall bottom plate, prefabricated wall panel, sound insulation material layer, reinforcing bar layer and buffer pad, the one side of prefabricated wall bottom plate is provided with integrated electrical pipeline mounting groove, the integrated electrical pipeline mounting groove is arranged fixed with integrated electrical pipeline through the fixed clamp of installation, the prefabricated wall bottom plate is opened with the docking groove, the prefabricated wall panel is installed with the docking rod, the docking rod is connected with docking groove slidingly, the prefabricated wall panel is opened with fixed screw hole B, the docking rod is opened with fixed screw hole A, fixed screw is installed in fixed screw hole A and fixed screw hole B with fixed screw hole B. The utility model makes the layout of electrical pipeline more flexible, and the electrical pipeline can be adjusted flexibly after the installation of prefabricated wall panel, increases the flexibility and variability of building internal space layout, does not need to destroy wall structure, greatly improves construction efficiency and the convenience of later maintenance.

The invention relates to the technical field of glass, in particular to curved-surface special-shaped multifunctional integrally-formed laminated glass which comprises an outer curved-surface glass plate, an inner curved-surface glass plate and an inner curved-surface glass plate, the inner curved surface glass plate has a second preset curvature matched with the first preset curvature; the at least one functional film layer is arranged between the outer curved glass plate and the inner curved glass plate, and the functional film layer is selected from one or more of a dimming film and a photovoltaic cell film; the first adhesive film layer and the second adhesive film layer are respectively positioned on two sides of the functional film layer and are used for bonding the outer curved glass plate, the functional film layer and the inner curved glass plate; wherein at least one of the outer curved glass plate and the inner curved glass plate is subjected to strengthening treatment through a low-temperature ion exchange process, and the surface stress ranges from 410 MPa to 1000 MPa. The technical problems that in the prior art, the curved surface adaptability and the strengthening effect are insufficient are solved. The invention correspondingly provides a preparation method of the curved-surface special-shaped multifunctional integrally-formed laminated glass.

The utility model provides a cleaning assembly, a cleaning module and cleaning equipment. The cleaning assembly comprises a mounting frame and a cleaning assembly, the cleaning element is connected to the mounting frame; the shielding part is movably arranged relative to the cleaning element and can be switched between a first position and a second position, the shielding part at least shields the bottom edge of the cleaning element at the first position, and the shielding part at least exposes the bottom edge of the cleaning element at the second position. Therefore, the requirements of different operations that the cleaning assembly conducts cleaning operation on the walking face and the cleaning assembly does not need to conduct cleaning operation on the walking face and actively shields the bottom edge of the cleaning element through the shielding part can be met, and after the shielding part shields the bottom edge of the cleaning element, the bottom edge of the cleaning element can be shielded by the shielding part. The possibility that a walking surface is polluted by cleaning elements can be reduced, and the cleanliness of the walking surface is improved.

The utility model discloses a Type-C female seat circuit structure with overcurrent protection and intelligent identification functions, comprising a Type-C 6P female seat (1), configuration channel pins CC1 and CC2, a power supply pin VBUS, a grounding pin GND, and data pins D + and D. The CC1 pin is connected to the GND pin through a first pull-down resistor (2), the CC2 pin is connected to the GND pin through a second pull-down resistor (4), and the data pins D + and D. The resistance value of the first pull-down resistor and the resistance value of the second pull-down resistor are both 5.1 kilohms. According to the Type-C 6P socket, the double 5.1 kilohm pull-down resistors and the PTC thermistor are integrated in the Type-C 6P socket, so that the functions of multi-protocol automatic identification and over-current and over-temperature protection are realized, an integrated patch packaging structure is adopted, and the Type-C 6P socket has the advantages of high compatibility, safety and miniaturization integration.

The application relates to a complex curved surface shock wave body counter-design method based on a three-dimensional curved flow surface method, and relates to a hypersonic wave body. The complex curved surface shock wave body is provided with a complex curved surface shock wave body lower surface compression profile, a complex curved surface shock wave body upper surface profile and a complex curved surface shock wave body leading edge profile; the complex curved surface shock wave body lower surface profile and the complex curved surface shock wave body upper surface are connected by the complex curved surface shock wave body leading edge profile. A complex curved surface three-dimensional outflow shock wave is specified, and a wave body capture profile is designed; the complex curved surface shock wave is dispersed into a series of initial flow surfaces; shock wave angles, shock wave curvatures and wave rear parameters are solved; a complex shock wave curved surface wave rear flow field is solved, and a compression profile is determined; a wave body upper surface geometric shape is constructed according to design requirements; and the upper and lower surfaces are connected to form a complete complex curved surface shock wave body geometric shape. The method has higher calculation efficiency and higher precision, and provides a wider performance improvement space for aircraft design through free shock wave selection.

This utility model discloses a tangential combustion system for pulverized coal boilers suitable for low-volatile coal types. It includes a boiler body, an air preheater, a secondary air fan, a primary air fan, and multiple coal mills. Each coal mill outlet is connected to multiple pulverized coal pipes. All pulverized coal pipes are connected to pulverized coal burners on the boiler body. Each pulverized coal burner is equipped with a burner air box. The secondary air fan outlet is connected to the burner air box via the air preheater. The primary air fan outlet is divided into two paths: one path connects to the hot primary air duct after passing through the air preheater, and the other path directly connects to the inlet of the hot primary air duct. The hot primary air duct outlet is divided into two paths: one path directly connects to the inlet of each coal mill, and the other path connects to the pulverized coal pipe at the outlet of each coal mill via a bypass hot primary air duct. This utility model can significantly increase the initial temperature of pulverized coal entering the furnace, improving the ignition and stable combustion capabilities of low-volatile coal.

The utility model discloses a kind of hard mirror type front end, including cylindrical shell, the rear hole of being extended from the rear end along the axial direction of the shell to middle part is opened in the shell, and the entity part located in the front part of the shell is formed;The upper part of the entity part is provided with the lens module channel of being penetrated along the axial direction of the shell, the lower part of the entity part is provided with the working channel of being penetrated along the axial direction of the shell;The lower part of the entity part is coaxially provided with instrument pipe channel along with the working channel, the cross section of the working channel and instrument pipe channel is circular, and the diameter of the cross section of the instrument pipe channel is greater than the diameter of the cross section of the working channel;Barrier is laterally arranged between the lens module channel and working channel.The beneficial effects of the utility model are that: structure setting makes it can satisfy the design requirement of lens module channel and instrument pipe channel;Lens module channel and instrument pipe channel design barrier in the middle, can more greatly increase the strength of front end.

The utility model relates to a touch mouse control circuit with a vibration feedback function, and relates to the technical field of mouse control circuits. The device comprises a controller, a power supply module, a first boosting module, a second boosting module, a motor driving module, a vibration feedback motor and a touch sensor, and the output end of the touch sensor is electrically connected to the input end of the controller; the voltage output end of the power supply module is electrically connected to the input ends of the first boosting module and the second boosting module, the output end of the first boosting module is electrically connected to the power supply end of the controller, and the output end of the second boosting module is electrically connected to the power supply end of the motor driving module; the vibration feedback motor is in controlled connection with the motor driving module, and the motor driving module is in controlled connection with the controller. The method has the advantages that clear feedback can be provided for customers, and the use experience is improved.

The utility model relates to a kind of low-power low-cost power supply circuit and conference system host power, comprising: input processing module, input filter module, control module, push-pull drive module, voltage conversion module and voltage output module;The input end of input processing module is connected to external power supply, the input end of input processing module, input filter module, control module and voltage conversion module are connected to the output end, push-pull drive module is connected with the input end of voltage conversion module and the drive end of control module respectively, the input end of voltage conversion module is connected with the output end of voltage output module, and the output end of voltage output module outputs multiple groups of power supply signals.The power supply circuit of the utility model can significantly reduce electromagnetic interference, reduce output ripple, improve power stability and reliability, and can simplify circuit design, voltage conversion efficiency is high, and can meet the design requirements of conference host.

The invention provides a protein skeleton screening method and device, electronic equipment, a storage medium and a computer program product, relates to the technical field of computers, in particular to the technical field of protein design and the like, and can be applied to a protein design scene. According to the specific implementation scheme, for a target initial skeleton corresponding to the screening operation in an initial skeleton set, a representative skeleton is screened out from a target skeleton family to which the target initial skeleton belongs, and the target skeleton family comprises the target initial skeleton and a progeny skeleton generated based on diffusion of the target initial skeleton; generating a filial generation skeleton based on diffusion of the representative skeleton, and determining a target skeleton family to which the filial generation skeleton belongs; and determining a target initial skeleton and a non-target initial skeleton corresponding to the next screening operation from the initial skeleton set according to the fitness of the skeleton in each skeleton family. The invention provides an iterative screening mode of the skeleton, the high-quality skeleton can be screened out from the initial skeleton set, and the design effect of the protein sequence is improved.

This invention relates to the field of prefabricated concrete buildings, specifically to a prefabricated self-resetting seismic-resistant column base joint connection structure and its construction method. It solves the problems of easy damage to the concrete contact surface of self-resetting column base joints, complex damper structures, and difficult replacement in existing concrete structures. This invention uses an external foundation steel plate and an external column end steel sleeve to form a protective contact surface. It employs a slot-type energy-dissipating damper to dissipate seismic energy. The relative rotation between the arc-shaped connector and the receiving steel plate, combined with the double-sided friction between the inner and outer leveling steel parts and the receiving steel plate, achieves efficient energy dissipation. Simultaneously, it bears the joint shear force and bending moment. The shear force is mainly borne by the slot-type energy-dissipating damper, and the bending moment is mainly borne by the prestressed tendons, which also provide post-earthquake self-resetting force. All components of this invention can be prefabricated in the factory and then transported to the construction site for assembly. The slot-type energy-dissipating damper is more convenient and faster in terms of installation and replacement, significantly reducing construction costs.

The embodiment of the invention provides a random map area generation method and device, equipment, a medium and a product, and the method comprises the steps: receiving a pre-configured map generation parameter, and determining a topological structure diagram corresponding to a target area based on the map generation parameter; mapping the topological structure diagram into a map plate corresponding to the target area to obtain a to-be-processed map dividing the target area into at least one sub-area; and adjusting the to-be-processed map based on the region identifier in the map generation parameter, the terrain type corresponding to the region identifier and the corresponding area distribution weight, and generating a target map matched with the map generation parameter. According to the technical scheme, the problem that the adjacency relation in random region generation is difficult to accurately control is solved, and meanwhile, the area error of the generated region is reduced.

This disclosure relates to the field of infrared detection technology, and more particularly to an uncooled infrared detection pixel, chip, core, and device. The uncooled infrared detection pixel includes a first interconnect structure and a second interconnect structure. The first interconnect structure includes a first aluminum connection portion, a first tungsten connection portion, a second aluminum connection portion, and a beam structure connected in sequence. The second interconnect structure includes a third aluminum connection portion, a second tungsten connection portion, a fourth aluminum connection portion, and an absorption sensing portion connected in sequence. The aluminum connection portion includes an aluminum layer, and at least one aluminum connection portion further includes a titanium layer and / or a titanium nitride layer, located on the side of the aluminum layer facing away from and / or towards the absorption sensing portion. The first interconnect structure connects the second interconnect structure and a readout circuit. The first aluminum connection portion in the first interconnect structure connects to the readout circuit. The second aluminum connection portion in the first interconnect structure and the third aluminum connection portion in the second interconnect structure connect to the beam structure. This interconnect structure can solve the noise instability problem caused by the interconnection of the infrared detection chip, and can reduce noise and improve process stability.

The utility model discloses a hot press forming die set for preparing a paper bowl with a bottom rib structure, relates to a disposable container, and aims to solve the technical problems that the paper bowl is easy to tear and damage and difficult to form in the combined processing process. The key points of the technical scheme are as follows: a hot-press forming mold group comprises a pre-pressing mold for pre-pressing to form an edge rib and a hot forming mold for hot-press shaping; the thermal forming die comprises a bottom die and an upper die, the bottom die is provided with a shaping cavity matched with the outer surface of the paper bowl, the upper die is provided with a forming die head matched with the inner surface of the paper bowl, the bottom die is provided with a heating cavity around the shaping cavity, and the heating cavity is provided with a heating coil. The utility model aims to provide a hot-press forming die set for preparing a paper bowl with a bottom rib structure.

This utility model discloses a shaping device for antibacterial and wear-resistant large brushes, including a base, a feeding guide plate horizontally fixed to the base, and a plurality of horizontally rotatably mounted feeding guide rollers, a plurality of horizontally fixed tension shafts, two pairs of horizontally rotatably mounted shaping roller groups, a horizontally rotatably mounted export roller, and a horizontally rotatably mounted take-up roller arranged sequentially on the base. A bracket is also fixed on the base, and the bracket is located between the tension shafts and the shaping roller groups. A cylinder is vertically fixed to the bracket, and the piston rod end of the cylinder is connected to a connecting plate. A pre-shaping plate with heating function is fixed to the connecting plate, and the pre-shaping plate can cooperate with the feeding guide plate. The pre-shaping plate has an inclined guide surface. The shaping roller group includes an upper heating roller and a lower pressure roller.

This invention discloses a topology for an intelligent power module. The intelligent power module has multiple groups of power devices arranged on a DBC substrate, forming four bridge arm structures. The intelligent power module also has multiple external pins corresponding to the connection terminals of each of the four bridge arm structures. By adjusting the connection method of these external pins, the intelligent power module can form different topologies. Compared with existing technologies, this invention can adapt to different circuit structures and meet the diverse circuit design needs of users by adjusting the connection method of the intelligent power module's external pins.

This invention discloses an anti-intake distortion flame tube and combustion chamber in the field of aero-engine technology. The anti-intake distortion flame tube includes an annular tube body and a mixing unit mounted on the tube body. The mixing unit includes a first-stage vortex generator fixedly mounted at the head of the tube body and a fuel nozzle coaxially mounted through the first-stage vortex generator for delivering fuel into the tube body. A fairing is mounted on the tube body to cover the first-stage vortex generator. The intake uniformity of the first-stage vortex generator is controlled by the air inlet opened in the fairing. The size of the fairing matches the first-stage vortex generator to cover a single first-stage vortex generator. By using a fairing that matches the size of the first-stage vortex generator to cover a single first-stage vortex generator, multiple fairings are independent of each other. Compared with improving the intake uniformity of the vortex generator by increasing the density of the vortex generator blades or enlarging the air inlet, the fairing can achieve greater rectification benefits with less weight.

The utility model discloses a gamepad key prepressing mechanism, which comprises a lifting device, a key circuit board and a key cap, the key circuit board is arranged on a lifting seat of the lifting device, the key circuit board is provided with a key, and the lower end of the key cap is contacted with the topmost end of the key. The lifting device realizes that the lifting seat drives the key circuit board and the keys to lift, so that the pressing force of the keys is adjusted. The mechanism does not need to disassemble a handle and use a spring, solves the problems of inconvenience and inaccuracy in adjustment and the like in the prior art, and improves convenience, stability and accuracy.

The utility model, which belongs to the technical field of the optical lens, discloses an M43-format ultra-large-aperture medium-short-focus lens comprising a first lens group, a second lens group, a third lens group, and a fourth lens group which are successively arranged from the object side to the image side along the optical axis. The focal lengths of all the lens groups satisfy the following conditional expressions: 3 < f (G1) / F < 5; f (G3) / F is greater than-4 and less than-2; f (G2) / f (G4) is more than 0.5 and less than 0.9; and 0.4 < f (G4) / f (G1-G3) < 1.5. The focusing assembly of the ultra-large aperture medium-short focus lens is only composed of one lens, so that the weight of a focusing group and the load of a pushing motor are reduced, rapid focusing of the lens and imaging equipment is facilitated, and the design requirement of automatic focusing is met; the lens corrects various aberrations of various wavebands, enables the central and edge fields of view to have enough resolution, has the advantages of simple structure, small size and large aperture, and can realize imaging of an object distance from infinity to close distance.