80results about How to "Suitable for assembly" patented technology

The invention discloses an abnormal vibration analysis-based GIS (gas insulated switchgear) mechanical fault diagnosis method and system. The GIS (gas insulated switchgear) mechanical fault diagnosis method includes the following steps that: vibration signals on a GIS are acquired; de-noising processing is performed on the acquired signals through using a threshold de-noising method; various kinds of feature information contained in the signals are extracted by using a narrowband noise aided multivariate empirical mode decomposition (EMD) method; the power feature of the signals is extracted by using a power density function, and the maximal amplitudes of the power spectra of all IMF of each channel are calculated so as to form power feature matrixes under measured conditions; and a power feature matrix under a normal condition and / or power feature matrixes under various kinds of fault conditions which are obtained through tests are adopted as judgment criteria of faults. Compared with a traditional method, the method and system of the invention have no influence on the normal operation of a whole power system, and can monitor the running state of the GIS safely and reliably, and are suitable for being applied to GIS substations of various voltage levels.

The invention provides an image sampling lens system, an image sampling device and an electronic device. The image sampling lens system sequentially comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens from the object side to the image side. The first lens has a positive refractive power, and the object-side surface of the first lens is a convex surface. The second lens has a negative refractive power. The third lens has a refractive power, and both the object-side surface and image-side surface of the third lens are aspheric surfaces. The fourth lens has a negative refractive power, and both the object-side surface and image-side surface of the fourth lens are aspheric surfaces. The fifth lens has a refractive power, and both the object-side surface and image-side surface of the fifth lens are aspheric surfaces. The sixth lens has a refractive power, and the object-side surface of the sixth lens is a concave surface. The image-side surface of the sixth lens is a convex surface. Both the object-side surface and image-side surface of the sixth lens are aspheric surfaces. In the foregoing configuration condition, the converging ability of the whole system is focused on the object-side end of the lens, and the volume of the system can be effectively controlled. Therefore, the carrying convenience is improved. In addition, the chromatic aberration of the system and the peripheral focusing positions of an image are corrected. At the same time, the bending of peripheral images is avoided.

The present invention relates to an ion generating device, and provides an ion generating device which can not be influenced by litter deviation of machining precision or assembly precision and can stably execute corona discharge. The ion generating device of the invention is provided with a barrel wall (47), an acicular discharge electrode (42) arranged at the center of the barrel wall (47), and a barrel relative electrode (43) arranged at the circumference of the barrel wall (47). The edge of the relative electrode (43) is formed with a group of sharp convex parts (44).

The invention relates to an EVM rubber composition used as a fuel hose coating. The composition comprises the following components in parts by weight: 100 parts of EVA, 50 to 60 parts of reinforcer N330, 5 to 10 parts of plasticizer DOS, 2 parts of anti-aging agent RD, 2 to 3 parts of anti-hydrolysis agent P50, 0.5 parts of processing aid stearic acid, 2 parts of processing aid polyethylene wax, 2 to 3 parts of vulcanizing aid DCP, and 1 to 3 parts of vulcanizing aid TAC. Since EVM (ethylene vinyl-acetate copolymer) is used as the major material, on the one hand, the EVM rubber composition as the fuel hose coating is resistant to fuel corrosion and more favorable for safety transportation of fuels, and on the other hand, the cost is lower than that of AEM and about a half that of AEM provided by the DuPont company, so that the cost is saved.

The present invention discloses an external temperature field device for assisting the growth of two-dimensional black phosphorus crystals (hereinafter referred to as "external temperature field device"). The device includes a power supply, a switching power supply, a relay, a temperature control module, a thermocouple, and a heating wire. The device can control the heating of the heating wire andperform temperature programming and cooling by setting parameters of the temperature control module, and an external temperature field generated by the device can well assist the growth of the blackphosphorus crystals. The invention also discloses a using method and an application of the device. Compared with conventional tubular furnace heating modes without the "external warm field device", the method of the invention has the advantages of compensation of the temperature loss in the furnace, improvement of the distribution uniformity of the temperature field in the furnace, control of thetemperature field distribution and temperature change in a specific region, and facilitation of accurate control of the volatilization and transportation process of reaction raw materials, the nucleation and growth process of black the phosphorus crystals and the generation process of byproducts.

The invention discloses a vaned petrol engine which comprises a stator, a rotor, a vent hole, an air inlet, an electrically controlled gasoline nozzle and a spark plug. The cross section of the inner cavity of the stator is elliptic; the axes of the rotor and the stator are overlapped; the cross section of the rotor is round; at least 8 troughs are uniformly arranged on the surrounding body of the rotor along the circumference direction; vanes are arranged in the troughs; under the rotating state of the rotor, the top ends of the vanes are contacted with the inner wall of the stator; two sides of the vanes and two ends of the rotor are respectively contacted with two ends of the stator to form sealed air chambers, the number of which is equal to that of the troughs; the vent hole is arranged at the left upper area of the stator; the air inlet is arranged at the right upper area of the stator; moreover, the electrically controlled gasoline nozzle and the spark plug are arranged at the left lower area of the stator. The vaned petrol engine can reduce the size of the rotor, is convenient to replace the vanes, reduces the production and running cost, runs smoothly, is hard to damage spare parts, has long service life, improves the thermo-motive efficiency, and can be manufactured into a high-power engine.

The adjustable gliding table top includes one pedestal with parallel transverse raised strips, one transverse sliding carriage with bottom transverse grooves set on the transverse raised strips through the slide fit between the transverse raised strips and the transverse grooves, two or more longitudinal guide rails set on the transverse sliding carriage, one installation board with parallel longitudinal raised strips set on the longitudinal guide rails, one longitudinal sliding carriage with bottom longitudinal grooves set on the longitudinal raised strips through the slide fit between the longitudinal raised strips and the longitudinal grooves, and two or more transverse guide rails set on the longitudinal sliding carriage. The present invention has precise conveyance, smart structure, flexible running and simple manufacture process.

The invention relates to a brake light flicker indication method. A brake light intelligently flickers according to a certain rule to provide clear stroboscopic effect and understanding for people, thus a brake light indication function is improved; and during a vehicle braking process, the brake light flickers when the speed of a vehicle is an arbitrary value more than or equal to zero, the working conditions of the brake light and a width lamp can be effectively distinguished under the condition that the brake light starts flickering at an acceleration zero point, and the brake light can flicker in different frequencies to display the braking strength of the vehicle, thus a follow-up vehicle can clearly know the braking condition of the front vehicle, corresponding measures can be adopted in advance, and an accident can be prevented.

The invention relates to reversing radar punching equipment special for an automobile rear bumper. The reversing radar punching equipment comprises a rack, a bumper positioning device, a punching assembly I, a punching assembly II and a punching assembly III. The rack is provided with an air cylinder mounting plate and a forming die mounting plate. The punching assembly I, the punching assembly II and the punching assembly III are each composed of a bumper profiling forming die arranged on the forming die mounting plate, a punching air cylinder connected to the air cylinder mounting plate and a punching knife arranged on the punching air cylinder. The middles of the bumper profiling forming dies are provided with punched holes matched with the punching knifes. The end faces of the bumper profiling forming dies are circular-arc faces. The bumper positioning device is composed of two positioning pins. The reversing radar punching equipment has the advantages that the equipment is high in positioning accuracy, free of influences on product surface quality, high in production efficiency and the like, and the punching quality meets the assembling requirement of reversing radar.

The invention discloses a heat tube type all-glass vacuum solar collector tube which belongs to the field of solar energy utilization equipment and is formed by combining an all-glass vacuum solar collector tube (1) and an all-glass heat tube (2); the evaporation section (3) of the all-glass heat tube (2) is formed by an inner glass tube (9) in the all-glass evacuated solar collector tube (1), and the condensation section (4) of the all-glass heat tube (2) is formed by coaxially extending the inner glass tube (9) outwards from a ring seal cup opening (1) of the all-glass vacuum solar collector tube (1) with equal diameter; the wall thickness of the inner glass tube (9) is more than that of a cover glass tube (8) of the all-glass vacuum solar collector tube (1) by 0.8-1.2 mm, and the thickness of the glass wall of the hot seal end (5) on the condensation section (4) is equal to the thickness of the wall of the cover glass tube (8); a heat transfer medium (7) is filled in a vacuum cavity (6) of the all-glass heat tube (2), and the volume ratio of the heat transfer medium (7) and the vacuum cavity (6) is 0.05%-0.4%; and the length L1 of the condensation section (4) is 70-150mm. The heat tube type all-glass evacuated solar collector tube integrates the heat collection and heat transferring, is quick in heat transfer speed, high in heat efficiency, good in performance, safe and reliable, easy to manufacture, low in cost, convenient to install and transport and easy to promote and apply, and the national performance standards can be met.

The invention provides a livestock and poultry house culture environment alarm system which comprises an environment control system and an alarm system. The environment control system comprises a large electrical network, an anti-error knife switch, an air switch, a power supply master switch, a blower fan switch, a blower fan AC contactor and a blower fan which are connected in order, wherein the anti-error knife switch is connected with a house generator, the blower fan AC contactor is connected with an environment controller, and the power supply master switch is connected with the alarm system. The alarm system comprises an intermediate relay, a temperature controller, an alarm switch, an alarm indicating lamp, a time relay, a time switch, a phase failure and phase sequence protector, an accumulator jar and an accumulator jar charger. According to the invention, the livestock and poultry house culture environment is monitored in all dimensions. Once an abnormal case occurs in the culture environment, the alarm system can emit an alarm timely and prompt a culturist to adopt solutions to keep the livestock and poultry house environment in a normal level, and a purpose of effective and safe production is achieved.

The invention discloses a combined type wind wheel blade and a wind generating set comprising the same. The combined type wind wheel blade is characterized in that docking end surfaces of adjacent combining sections are respectively connected with inner and outer flange plates, the inner and outer flange plates are inserted to combined, and side walls of inserting combined parts are joined so as to form a rectangular groove; the rectangular groove is divided into multiple sections, and the outer flange plate arranged between the adjacent sections is provided with an opening (wedge-shaped stripe inserting hole); the wheel blade also comprises multiple groups of wedge-shaped strip belts the number of which is equal to that of sections of the rectangular grooves, left and right wedge-shaped stripes of each group of wedge-shaped stripes are respectively inserted into the rectangular grooves from openings of the two ends of the rectangular groove of the same section in the reverse direction, so as to form interference fit with the rectangular grooves, and opening parts of subsections of the rectangular grooves are also fixedly provided with connecting end cap. The combined type wind wheel blade and the wind generating set provided by the invention have the advantages that the structure is simple, the connection is reliable, the assembly is simple and convenient, the production efficiency is high, the pneumatic appearance of the blade is guaranteed, the manufacture and transportation difficulty of a large-scale wind wheel blade are greatly reduced, the production and transportation costs are reduced, the production and transport efficiencies are improved, and local rapid assembly is realized.

The invention provides a low-noise light-thin photoelectric sensor, comprising a photoelectric sensing base and a transparent base, wherein the photoelectric sensing base comprises a photoelectric converter area, an electrode welding pad which can be used as external electrode connector or an external electrode joint wedge through the photoelectric sensing base, a peripheral circuit surrounding the photoelectric converter area, which is electrically connected with the photoelectric converter area, the electrode welding pad and / or joint wedge on the photoelectric sensing base, or further to be used as the output, input, signal amplification of photoelectric signal, and the decode of pixel address of the photoelectric converter. The transparent base comprises a groove relative to the electrode welding pad, via bonding art to be directly jointed with the transparent base and the base of the photoelectric sensor. The invention has easy assembly, which can support batch production of one integrated chip or at least part of chips of one photoelectric sensor, to simplify the production and reduce production cost. The invention also provides the production method and relative photoelectric sensing modules of photoelectric sensor.

The invention relates to a high-precision lens press-in assembling device. The device comprises a lens cone socket, a lens socket, a lens press-in mechanism and a sliding mechanism. The whole device is arranged on a work table, the sliding mechanism can slide on the work table, the lens cone socket and the lens socket are arranged on the left side and the right side of the sliding mechanism respectively, the lens press-in mechanism is suspended above the sliding mechanism and comprises a lens adsorption mechanism and an actuating mechanism, and the actuating mechanism drives the lens adsorption mechanism to move. The high-precision lens press-in and assembly device is a simple type semiautomatic lens press-in and assembly device, by means of the linkage of sliding blocks, coaxial positioning can be simply and efficiently achieved and parallel relative regulation is conducted. On the premise that a stable product machine is ensured, the initial investment cost of a high-end device and the space requirements are reduced. The device is especially suitable for assembly of small-batch and multi-variety optical lenses or optical elements.

The invention relates to a mercury-free zinc-manganese-carbon paste battery. Its electrolyte is mainly composed of MgCl2 and NH4Cl2, supplemented by three components of ZnCl2. There is no distinction between internal and external electrolytes. Each liter of electrolyte contains the following weight percentages The substance MgCl2 11.0-16.0%, NH4Cl 12.0-14.0%, ZnCl2 6.0-9.0%, the rest is water, add PVA 1.00-2.00g, B(OH) 3 0.20-0.40g, the specific gravity of the electrolyte is 20-25 wave Mido, pH 5.0-6.0. The battery uses a mercury-free corrosion inhibitor, which is mainly boron alcohol resin produced by PVA and B(OH)3, supplemented by 16C or 18C trimethylammonium chloride, or alcohol produced by PVA and B(OH)3 Based on boron resin, supplemented by InCl3 or BiCl3, the present invention realizes the mercury-free battery through the improvement of the electrolyte system and corrosion inhibition technology, and can greatly improve the discharge performance and storage performance of the battery, and can also solve the problem of waste batteries from the source of production. pollution of the environment.

The invention discloses a water quality processor on the drinking machine and outlet mouth of drinking water, which consists of outlet mouth and water quality processor, wherein the water quality processor contains case, filter core and adaptor; the filter core is set in the case through upper lid and lower lid; the adaptor is set on the case through assembling lid; the outlet is opened on the bottom of case; the filter core is composed of one or more layer of active charcoal filter layer, alkaline active ball filter layer, FF composite molecular screening layer, energy ceramic ball filter layer and magnetic coil; the processor removes dust and bacteria in the water effectively, which changes drinking water into fresh beneficial drinking water.

The invention relates to a wire harness workbench for assembling a passenger car, which comprises compound pipes and joint components, wherein the compound pipes are connected by the joint components so as to form a detachable workbench. Compared with the prior art, the wire harness workbench for assembling the passenger car has the advantages of easy disassembly and assembly, extensive use range, good safety and adaptability and the like.

The invention belongs to the technical field of fuel cells, and relates to a manufacturing method of a Fe-Ni-Cr alloy fuel cell bi-polar plate. The method comprises the following steps of: mixing materials, wherein the materials comprise Fe with the content of x (atomic percentage), Ni with the content of y (atomic percentage) and Cr with the content of z (atomic percentage), x is equal to 37-39 percent, y is equal to 32-34 percent, z is equal to 28-30 percent, and the sum of x, y and z is 100 percent; smelting FexNiyCrz alloy by utilizing vacuum induction; molding and machining a metal plate; carrying out surface chemical treatment; placing the metal plate with a flow field in an HF water solution with the volume concentration of 45-50 percent under 20-30 DEG C and soaking for 7-9 min, taking out, cleaning and drying. The fuel cell bi-polar plate prepared by the method has the advantages of excellent corrosion resistance and conductivity, simple manufacturing process, low operation temperature, no easy deformation of the plate, suitability for assembly of a fuel cell pile and low cost.

The invention relates to an electric arc spraying type tube wire with a gamma-ray radiation shielding type coating. The electric arc spraying type tube wire is characterized in that a nickel strip is filled with tungsten carbide, tellurite, ferromolybdenum, cobalt-copper, powdered aluminum, high-carbon ferro-chrome and ferroboron and is rolled and drawn to form the tube wire phi 2.0-3.0 mm in diameter. Compared with a traditional lead-bearing shielding material, the coating formed by electric arc spraying has the advantages of no toxicity, high temperature resistance, high forming speed, simple technology, excellent shielding performance, high radiation resistance and excellent mechanical performance. The electric arc spraying type tube wire with the gamma-ray radiation shielding type coating can be used for gamma-ray radiation shielding in the fields such as various nuclear reactors, accelerators and isotope radioactive sources.

The invention relates to the technical field of frequency converters, in particular to a supporting platform for frequency converter assembly. The supporting platform for frequency converter assemblycomprises two first supporting rods; one side of each third supporting rod is provided with a second threaded rod; the two ends of each second threaded rod are rotationally connected with the corresponding third supporting rod; a driven chain wheel is connected to the lower part of the outer side of each second threaded rod in a sleeving manner; a threaded sliding block is connected to outer sidethreads of each second threaded rod; the upper surface of each threaded sliding block is fixedly provided with a second supporting rod; a connection rod is connected between the two third supporting rods; the lower end of a rotary shaft is rotationally connected with the connection rod; each driving chain wheel is in transmission connection with the corresponding driven chain wheel through a chain; and a first supporting plate is connected to the upper ends of the two second supporting rods together. The supporting platform provided by the invention can perform omnidirectional regulation on aheight, an inclination and a rotation angle of a frequency converter in a groove, enables frequency converter assembly to be more efficient and rapider, saves the manpower and material resources, improves the assembly efficiency and lowers the loss of an enterprise.

The invention discloses a thermoelectric conversion integrated reactor with a turbine. A turbine engine is added based on a Stirling type thermoelectric conversion integrated reactor, so that output power is remarkably improved. A reactor internal comprises a reactor pressure vessel, reactor internals, a reactor core, an inner shield, an electric generator, a starting engine, a turbine and a gas compressor, the reactor pressure vessel comprises a cylinder, a cover and a bottom sealing head, the cylinder is similar to a cylindrical shape, the cover is arranged at the top of the cylinder in a covering manner, the bottom sealing head is supported at the bottom of the cylinder, and a reactor external comprises a drum control rod and a heat pipe cooler. A basic idea of the reactor is applicableto fast reactors, also applicable to thermal reactor and further applicable to other persistent heat sources such as isotope heat sources.

The invention provides a microchannel heat exchanger core applicable to a gas turbine system. Heat exchange core plate sheets of the microchannel heat exchanger core are annular and are provided withflow channels formed by etching or machining; the shape of each flow channel is elliptical; the depth of each flow channel is in millimeter level; the equivalent diameter of each flow channel is 1-2 mm; the two heat exchange core plate sheets are assembled into a heat exchange unit; and the microchannel heat exchanger core applicable to the gas turbine system is formed by fixedly connecting a plurality of the heat exchange units through diffusion welding. The microchannel heat exchanger core applicable to the gas turbine system solves the technical problems that the unit thrust of a traditional gas turbine increases along with the increase of the compressor pressure ratio, the increase of the compressor pressure ratio under a high-load condition can lead to overheating of an air inlet system, and even the temperature of the system exceeds the material limit of the existing gas turbine. According to the microchannel heat exchanger core applicable to the gas turbine system, on the basisof an original printing plate-type heat exchanger art, the circular plate sheets are adopted, and a cold and hot side plate sheet flow channel structure is redesigned, so that a cylindrical microchannel heat exchanger suitable for the gas turbine system is manufactured through diffusion welding.

The invention provides a cornice plug-in gutter structure and an installation method. Indoor water leakage can be effectively prevented, structure combination is convenient, and installation is convenient. The gutter structure is characterized in that a purline hanger is fixedly installed on a body steel frame, a cornice purline is located on the inner side of a wall surface and fixed to the purline hanger, an insulation layer is fixed to the upper end of the cornice purline through a screw, cornice bent angle steel is in an elongated slot type, the elongated slot type cross section is provided with a left side wall, a right side wall and a top plane, the right side wall is located on the inner side of the wall face and fixed to the cornice purline, the left side wall is located on the outer side of the wall face, the top plane is a preset distance higher than the upper end of the purline, a trough of a roof panel is supported on the top plane, and a screw is located below the trough and separated from the trough; on the outer side of the wall face, the trough of the roof panel is fixed to the top plane of the cornice bent angle steel through a bolt, and the plug-in gutter is installed on the left side wall of the cornice bent angle steel through a supporting assembly.

The invention discloses an LED fin lamp which comprises an integrated fin support, a COB light source, a transmitting shell, a power source and a lamp cap. The LED fin lamp is characterized in that the lamp cap is connected to the integrated fin support, the COB light source is arranged on the outer side face of a fin of the integrated fin support, and the COB light source is provided with the transmitting shell and connected with the power source through a wire by means of a through groove. By the adoption of the integrated fin support made of heat-conducting plastic and epoxy resin, the COB light source is directly supported, fixed and sealed, and meanwhile heat on the COB light source is dissipated into air through the shortest path by means of the heat-conducting plastic. Bulky aluminum products or glass broken easily are not used in the whole lamp. The LED fin lamp has the beneficial effects of being long in service life, high in lighting effect, simple in structure and extremely low in labor cost, appearance plasticity is high, the material cost is low, and the LED fin lamp is suitable for industrial robot assembly.

The invention provides a radiating fin, wherein at least two rows of hairpin tube jacks are arranged on the radiating fin; a lancing passing through the radiating fin, is arranged between the adjacent rows of hairpin tube jacks, so as to form a partial connection structure; the lancing is arranged right between two rows of hairpin tube jacks; and the invention also provides a heat exchanger having the radiating fin, which can solve the heat transfer problem of the radiating fin effectively and increase the radiating efficiency.

The invention belongs to the technical field of fuel cells and provides an in-situ preparation method of a carbonized film on the surface of a Fe-Ni-Cr bipolar plate. The in-situ preparation method is characterized by comprising the following steps of: (1) alloy component selecting and melting, namely, mixing the components based on that the atomic percentage content of the component Fe is x, the atomic percentage content of the component Ni is y and the atomic percentage content of the component Cr is z and carrying out vacuum induction melting on the FexNiyCrz alloy, wherein x is equal to 37-39%, y is equal to 32-34%, z is equal to 28-30% and the sum of x, y and z is 100%; (2) metal plate forming processing, namely, processing the FexNiyCrz alloy into a metal plate with a flow field according to the conventional method; and (3) in-situ surface treatment, namely, carrying out surface acid treatment (a), low-temperature heating treatment (b) and electrochemical treatment (c) on the metal plate with the flow field obtained in the step (2) in sequence, thus obtaining the Fe-Ni-Cr alloy bipolar plate of a fuel cell. The bipolar plate of the fuel cell, prepared by using the method, has excellent corrosion resistance and electrical conductivity, and is simple in manufacturing process, low in cost, not easy to deform and suitable for assembling fuel cell stacks.

The invention discloses an adjustable automobile seat. The adjustable automobile seat comprises an automobile seat, front end sensors, rear end sensors, a left guide rail, a right guide rail and springs, wherein two front supporting legs of the automobile seat are supporting legs with a fixed height, and two rear supporting legs of the automobile seat are electric retractable supporting legs; a left front supporting leg and a left rear supporting leg are mounted in the left guide rail in an embedded manner, and a right front supporting leg and a right rear supporting leg are mounted in the right guide rail in an embedded manner; the front end sensors are arranged at the front ends of the left guide rail and the right guide rail; the rear end sensors are arranged at the rear ends of the left guide rail and the right guide rail; the front end sensors and the rear end sensors are connected to a single-chip microcomputer through a data line and then are connected with the electric retractable supporting legs; the springs are mounted in the right guide rail and the left guide rail; and one end of each spring is fixed on the corresponding supporting leg of the automobile seat, and the other end of each spring is fixed on a front end wall surface or a rear end wall surface of the left guide rail or the right guide rail. The adjustable automobile seat disclosed by the invention is simple in structure, diverse in functions, high in safety and low in cost, and is suitable for being used by a wide variety of people and assembled in various automobiles.

The invention discloses a liquid metal magnetofluid integral reactor, which internally comprises a reactor pressure vessel, reactor internals, a reactor core, magnets and gas-liquid separators. The reactor pressure vessel comprises a barrel, a cover and a bottom seal, the cover covers the top of the barrel which is cylindrical approximately, and the bottom seal is supported at the bottom of the barrel. The reactor is externally provided with thermodynamic working medium pipes, drum control rods, heat pipe radiators and a shielding structure. The liquid metal magnetofluid integral reactor is applicable to a fast reactor and also suitable for other durable heat sources such as isotope heat sources and is wide in structural size and output power adjustable range.

The invention particularly relates to a quick insertion structure for assembling electronic equipment. The quick insertion structure comprises a connecting piece and a fixing piece. The connecting piece and the fixing piece are detachably connected with each other, two connectors are symmetrically arranged on the connecting piece, connecting columns are arranged at corresponding locations on the fixing piece, connecting grooves which are matched with the connectors are formed in the tops of the connecting columns, and the connecting columns are made from elastic materials. The quick insertionstructure has the advantages that the quick insertion structure is provided with the connectors and the connecting columns, accordingly, the connecting piece and the fixing piece can be quickly movably connected with each other, can be stably connected with each other and are difficult to fall off, and the quick insertion structure is quite suitable to be used for assembling the electronic equipment.