56results about How to "Reduce hardness requirements" patented technology

The invention discloses a measurement testing bench which can measure three-direction rigidity of bogies of railway vehicles at the same time. A longitudinal or transverse rail wheel supporting base has the structure that an upper supporting plate is connected with a lower longitudinal or transverse movable platform by a load sensor; the longitudinal or transverse movable platform is internally provided with a cylinder roller which can be longitudinally rolled or transversely rolled by a bearing; two cylinder rollers are respectively arranged on a longitudinal or transverse convex beam of the base. During the testing, the rolling movement of the base and the movable platform is realized by the rolling of the cylinder rollers, with small friction force and smart movement. Parameters of vertical rigidity, longitudinal rigidity, transverse rigidity and geometrical structure of the bogies of the railway vehicles can be tested on the measurement testing bench which has the advantages of exact measurement value, high precision, simple structure, convenient operation and easy maintenance.

The invention discloses a measurement test bench capable of simultaneously measuring the three-way rigidity of a railway vehicle bogie. The longitudinal or transverse rail wheel support base is composed of: the upper support plate is connected with the lower longitudinal or transverse moving platform via a load sensor , The longitudinal or lateral movement platform is equipped with longitudinal or lateral rolling cylindrical rollers through bearings, and the two types of cylindrical rollers are respectively located on the longitudinal or lateral convex beams of the base. During the test, the rolling movement of the mobile platform and the base is realized through the rolling of the cylindrical rollers, with small friction and flexible movement. The parameters such as vertical stiffness, longitudinal stiffness, transverse stiffness and geometric structure of railway vehicle bogies can be measured on the test bench. The measured values ​​are accurate, the precision is high, the structure is simple, the operation is convenient, and the maintenance is easy.

A yoke-trunnion universal joint has a plastic anti-wear coating disposed between the sleeve and trunnion for lubrication, anti wear and absorbing vibration. A combining means combines the plastic ant-wear coating with sleeve or trunnion tightly. The plastic anti-wear coating is made by nylon or polytetrafluoroethylene. The universal joint has a simple structure, long working life, low operating noise and cheap manufacture cost. The most advantage is that the universal joint needs not oil or grease for whole working life. It is an oil or grease free and maintenance free universal joint.

The invention discloses a ready money distribution automatic processing machine. The ready money distribution automatic processing machine comprises a money receiving line, a palletizing mechanism and a film pressing strip tying mechanism which are arranged in a machine frame in sequence. The ready money distribution automatic processing machine further comprises a shunt mechanism and a load shifting mechanism. The palletizing mechanism comprises a circulating money stacking palletizing mechanism and an automatic teller machine (ATM) money stacking palletizing mechanism which are symmetrically arranged at two sides of the back end of the money receiving line. The shunt mechanism comprises a money type information detecting device, a shunt air cylinder and a shunt servo motor. The money type information detecting device is arranged on the money receiving line and sends motion signals to the shunt servo motor. The shunt air cylinder is arranged above and behind the money receiving line and is driven by the shunt servo motor to move between the circulation money stacking palletizing mechanism and the ATM money stacking palletizing mechanism. The load shifting mechanism is arranged on a position on the machine frame outside the film pressing strip tying mechanism and is driven to move the stacked money out by the air cylinder. The ready money distribution automatic processing machine is simple in structure, convenient to use, automatic in whole course control, strong in continuity, better in paper money protection, wide in application range, and high in practicability.

An electronic product comprises the following units: an optics fingerprint sensor including a pixel substrate, a light guide plate and a flexible print circuit board, wherein the pixel substrate has a pixel array; an outer cover plate having an outer surface and an inner surface, wherein the outer surface is provided with a first blind hole, and the first blind hole is opposite to the top surface of the pixel array. The pixel substrate comprises a flexible base plate, and comprises a fixed portion and a bending portion, wherein the fixed portion is arranged on the top surface of the light guide plate, and the bending portion is arranged outside the side edge of the light guide plate; the bending portion is bound with the first portion of the flexible print circuit board, and bends downward until the first portion of the flexible print circuit board and the inner surface of the outer cover plate mutually separate from each other or make zero-acting force contacts; the assemble structure of the optics fingerprint sensor in the electronic product is improved, so the assembling difficulty is reduced, thus lowered cost.

The invention discloses a pneumatic box sealing machine, which comprises a work table, a support frame, a box outlet rolling wheel support frame, a paper box inlet guide strip, a back lower covering folding guide mechanism, a front lower covering folding guide mechanism, a paper box push-out mechanism, a paper box lower covering folding press block, a left lower covering folding device, a right lower covering folding device and a pneumatic adhesive paper box sealing machine core device, wherein the paper box inlet guide strip, the back lower covering folding guide mechanism, the front lower covering folding guide mechanism and the paper box push-out mechanism are arranged above the work table, and the paper box lower covering folding press block, the left lower covering folding device, the right lower covering folding device and the pneumatic adhesive paper box sealing machine core device are arranged under the work table. The paper box static box sealing is adopted, the box sealing problem of soft paper boxes in certain specifications is specially solved, and the defect that universal box sealing machines in the existing market have the hard requirements on the paper boxes or the box sealing can only be realized after the compact loading of soft paper boxes can be overcome.

The invention relates to a jig used for drilling incline hole and the countersunk keyhole on the valve core of electro-hydraulic servo valves, comprising a jigs body (1), a drill bush (2), a padding block (4), two drill bush seats (51) and (52), a straight pin (6) and two quick-changing drill bushes (7). The invention is characterized in that: jigs body (1) is vertically-faced on the left and right sides, front side and the back side and the lateral faces; two end faces are bilaterally symmetric and take an included angle Beta with the horizontal plane; the intracavity is a hollow cylinder coordinating with the valve core clearance; the drill bush erection holes, countersunk threaded hole are arranged at both ends of the cylinder, and the gap for the installation of the quick-changing drill bush and bolts are arranged on the lateral face of the cylinder. The invention has the advantages of convenient clamping of the valve core on the driller vice and processing two inclined holes and the countersunk keyholes on the driller. Meanwhile, on the premise of guaranteeing the processing requirements, the frequent clamping of the jig is consistent with the positioning precision, the work efficiency is increased and the requirement of the technical level of workers is lowered.

The invention discloses a large-thickness 14Cr1MoR steel plate and a production method thereof. The large-thickness 14Cr1MoR steel plate comprises the following chemical components in percentage by mass: 0.12-0.14% of C, 0.5-0.6% of Si, 0.40-0.50% of Mn, 0.006-0.007% of P, equal to or less than 0.005% of S, 1.3-1.5% of Cr, 0.58-0.60% of Mo, 0.10-0.20% of Ni, equal to or less than 0.05% of Nb, equal to or less than 0.20% of Cu, equal to or less than 0.003% of Sb, equal to or less than 0.010% of Sn, equal to or less than 0.010% of As and the balance of Fe and unavoidable impurities. The production method comprises the procedures of smelting, continuous casting, heating, rolling and thermal treatment. According to the production method, the two-stage rolling control technology and the thermaltreatment technology of normalizing and tempering are adopted to solve the problems that the crystal particles are thick, non-uniform, lower in impact toughness and higher in hardness, and the head performance and the tail performance of the steel plate differ widely.

The invention discloses an elemental body vibration crusher, relating to a crusher. The invention aims at providing the elemental body vibration crusher which has high material crushing ratio, long service life and low noise. The technical proposal is that the elemental body vibration crusher comprises a motor and a jaw plate; a spring is respectively arranged between the left jaw plate and the right jaw plate and the exciter; the upper end of the jaw plate is pivotally connected with the machine body; the motor is connected with the exciter by a flexible coupler; a damping spring is arranged between the exciter and the upper part of the machine body; and the elemental body vibration crusher is used for crushers.

The invention relates to a metal tile water lubricating friction pair structure. A whole circle embedded thrust face is adopted for a thrust disc, and the thrust disc is made from graphite or silicon carbide or ceramic or a carbon fiber reinforced composite. A thrust tile is a metal tile, and the thrust tile is made of double-phase high-chromium alloy or is obtained by carrying out hardened layer treatment on the surface of a common steel material. The surface hardness of the thrust tile is HRC45-65, and the surface hardness of the thrust disc is HS50-85. The thrust face of the thrust disc is convenient to demount and maintain, the thrust tile is provided with a full-metal heat-insulation-free nonmetal tile face, the tile face is free of harmful concave deformation in a thermal transient state, and high temperature, high pressure and irradiation are resisted. The friction pair structure can be widely applied to the fields of three-generation nuclear power plants, small floating heaps and ship and warship nuclear power.

The invention discloses a waste lubricating grease collecting structure of a wind driven generator spindle bearing. The waste lubricating grease collecting structure of the wind driven generator spindle bearing has the advantages that a first grease collecting bottle is fixed to a turntable through a first grease delivery pipe and is communicated with a roller moving cavity through the first grease delivery pipe and a first grease outlet in the turntable, and a second grease collecting bottle is fixed to a rotor through a second grease delivery pipe and communicated with the roller moving cavity through the second grease delivery pipe and a second grease outlet in the rotor. A grease collecting pipeline is shortened, air in the grease collecting bottles is easily exhausted and can produce certain suction force under the effect of centrifugal force due to the fact that the first grease collecting bottle and the second grease collecting bottle are installed on the turntable and the rotor respectively, waste lubricating grease can timely flow into the grease collecting bottles, and accordingly when a grease supply device supplies new lubricating grease, the new lubricating grease can well extrude the waste lubricating grease, and the waste lubricating grease can be fully replaced by the new lubricating grease.

The present invention provides an electronic product. The electronic product comprises: an optical fingerprint sensor including a pixel substrate and a flexible printed circuit board, wherein the pixel substrate has a pixel array, and the first part of the flexible printed circuit board is bound at the upper surface of the pixel substrate; and an outer cover plate having an outer surface and an inner surface, the outer surface is provided with a first blind hole which is opposite to the upper surface of the pixel array, the inner surface is provided with a second blind hole which holds the top portion of the first portion of the flexible printed circuit board. The assembling structure of the optical fingerprint sensor of the electronic product is improved, the assembling difficulty is reduced, and the cost is reduced.

The invention discloses an automatic-moving-type stepping machine tail device. The automatic-moving-type stepping machine tail device is installed on the machine tail of a belt machine, and comprises guide rails arranged at two sides of the machine tail of the belt machine along the belt direction; lifting oil cylinders which are inverted on the machine tail of the belt machine are arranged above the guide rails; extending ends of piston rods of the lifting oil cylinders are connected with rolling wheels capable of rolling along the guide rails through rolling wheel shafts; climbing stop hooks are connected and installed between the rolling wheels and the guide rails; a shifting oil cylinder is also horizontally arranged above the guide rails; an end of a piston rod of the shifting oil cylinder is connected to a rolling shaft at one side, and the other end of the piston rod of the shifting oil cylinder is fixed on a shifting oil cylinder support seat on the guide rails; the lifting oil cylinders and the shifting oil cylinder are all connected with a hydraulic control system. According to the invention, the machine rail moves forward through the slide friction between the rolling wheels and the guide rails, the shifting resistance is lowered greatly, and the hardness requirement of a base plate can be lowered; meanwhile, the stress situation of the machine rail can be improved, the dimensions of components of the oil cylinders and the like can be shortened; the production cost and the energy consumption can be lowered.

The invention relates to an axial rubber pad and a cross supporting bogie. The axial rubber pad comprises an iron part, a top plate, a rubber layer and a reinforcing part; the iron part is of a cylindrical structure; the rubber layer comprises a columnar part, the columnar part is arranged outside the iron part in a sleeving manner, a gap is reserved between the columnar part and the iron part, the lower portion of the columnar part extends outwards in the radial direction to form a boss part, and the inner wall of the lower portion of the boss part is fixed to the outer wall of the iron part;the reinforcing part is embedded in the boss part in the circumferential direction; and the top plate comprises an axial part and an extending part, the axial part is fixed to the outer wall of the columnar part, and the extending part is fixed to the top end face of the boss part. By means of the axial rubber pad, the service life of the axial rubber pad can be effectively prolonged, so that themaintenance and application cost is further reduced.

The invention provides a demonstration instrument for demonstrating optical refraction and reflection law and measuring index of refraction on a blackboard. The demonstration instrument is composed ofa projection laser pen, laser pen placing and inserting parts, adjusting parts, a lantern ring, a T-shaped support plate, a cylinder-shaped rack, a gear sliding platform assembly, a connecting rod, an arc-shaped sliding chute, magnetic suckers, a Y-shaped bottom plate, an optical element, a scale disk, studs, gaskets, second springs, butterfly nuts, fixing parts and the like. Based on the technology of the invention with the application number 2019105819888, the technical scheme is characterized in that a gear is mounted at one end of a Pi-shaped sliding platform, the rack is formed in the bottom of the arc-shaped sliding chute, the Pi-shaped sliding platform is driven to move on the arc-shaped sliding chute by utilizing tooth coupling, the tiny adjustment for the incidence angle of incident rays is realized, the springs are arranged between the scale disk and the Y-shaped bottom plate for supporting, so that the direction of the face of the scale disk can be conveniently adjusted, the Y-shaped bottom plate and the arc-shaped sliding chute are connected to form a whole, so that the requirement for the hardness of a manufacturing material is reduced, the manufacturing cost and difficulty are reduced, the adjustment for the incident rays and the face of the scale disk is facilitated, time is further saved, and the classroom teaching efficiency is improved.

The invention relates to a valve element structure with high pressure difference and low flow. The valve element structure comprises a valve seat and a valve element which is arranged in an inner cavity of the valve seat. The valve element structure is characterized in that the valve element is successively divided into three sections, namely a valve element guide surface, a valve element sealing surface and a valve element conical surface from upside to downside. Multiple parallel slots are formed in the valve element sealing surface; the inner cavity of the valve seat is successively divided into three sections, namely a valve seat guide surface, a valve seat sealing surface and a valve seat conical surface from upside to downside. An adjustment window is formed on the valve seat guide surface; the valve element guide surface, the valve element sealing surface and the valve element conical surface are respectively matched with the valve seat guide surface, the valve seat sealing surface and the valve seat conical surface. The valve element structure with high pressure difference and low flow is simple in structure and good in economical efficiency, and prevents gas erosion.

Co-axial, multi-rotor wind turbines, producing more power than a single rotor of the same diameter, are made even more powerful by increasing driveshaft length and supporting the driveshaft from more than one point. Sacrificing the ability to aim, for the extra length to support additional rotors, results in a more powerful co-axial multi-rotor turbine, especially useful for areas with a predominantly unidirectional wind resource. Ideally the turbine is placed at an offset angle alpha from the wind direction, which, in combination with proper spacing between rotors, allows fresh wind to reach each rotor, so that all rotors contribute toward rotation of the driveshaft. Placing the driveshaft under tension can raise critical speeds and reduce the number of intermediate supports required. This places the Earth or underlying substrate in compression, making it effectively part of the structure of the turbine, saving cost. Cross-axis and reversible blades may also be incorporated.

The invention discloses an engagement and disengagement overturning mechanism for an accumulation conveyor. The mechanism is characterized in that a friction plate is pressed against the inner end face of a friction wheel through a pressure spring by a compression nut to provide friction force, wherein chain teeth on the friction wheel are engaged with a driving chain; the driving chain, the friction wheel and a trolley are driven to synchronously advance by a chain wheel; an end face fluted disc is arranged on the outer end face of the friction wheel; a pressure plate coaxial with the chain wheel is fixedly arranged on the outer side of the chain wheel, and rotates synchronously with the chain wheel; an engagement and disengagement inserted pin is arranged at the bottom of the trolley; an engagement and disengagement fluted disc is arranged on the front end face of the engagement and disengagement inserted pin; the engagement and disengagement inserted pin is engaged with the end face fluted disc of the friction wheel after the pressure plate is pressed against the tail part of the engagement and disengagement inserted pin, and is disengaged from the end face fluted disc of the friction wheel when the tail part of the engagement and disengagement inserted pin is freed from the pressing of the pressure plate. The engagement and disengagement overturning mechanism for the accumulation conveyor is functionally reliable, low in noise and cost and stable in running.

The present invention relates to a gear transmission mechanism using flexible belt as meshing medium. In order to overcome the defects of existent gear transmission mechanisms, said invention provides its technical scheme, and said technical scheme is characterized by that a movable and closed flexible belt is cover-mounted on the exterior of gear tooth of one gear, and two sides of the gear on which the flexible belt is cover-mounted are equipped with stopper ring respectively, and said stopper ring is connected with said gear by means of screw. Said invention can reduce friction of tooth face, reduce noise, can be lubricated by oil, also can be lubricated by water, and can utilize elasticity of flexible belt to automatically regulate error of form and position.

The invention provides an environment-friendly cleaning agent for cleaning remanufactured parts. The environment-friendly cleaning agent is prepared by adopting a method comprising the steps of collecting pulp of fruits after kernels are removed, crushing into 30-50 meshes, adding endoglucanase which accounts for 0.3-0.5 percent by weight that of soapberry pulp, completely immersing the endoglucanase in water, and placing for 24-48 hours at room temperature; controlling water, adding absolute ethyl alcohol which accounts for 50-60 percent by weight that of the soapberry pulp, and then, carrying out heating reflux in an oil bath at the temperature of 100-120 DEG C for 2-2.5 hours; adding petroleum sodium sulfonate which accounts for 0.5-2 percent by weight that of the soapberry pulp after cooling, and fully mixing to obtain red brown viscous liquid. The environment-friendly cleaning agent can be used for cleaning the manufactured parts, and is mainly used in an immersion cleaning stage and a washing stage; cleaned residual liquid is nontoxic and innocuous, has no pungent smell, and is basically free from corrosion. The environment-friendly cleaning agent can not combust, and is safe to human bodies, equipment, environment, metals and plastics without corrosion.

The invention discloses a valve rod comprising a rotary rod and a sealing plug. The valve rod is characterized in that the rotary rod and the sealing plug are of a split structure, and the rotary rod and the sealing plug can relatively rotate; and an end face pressing down the sealing plug is at least arranged on the rotary rod. In the valve rod disclosed by the invention, the rotary rod rotates and does not drive the sealing plug to rotate, and the sealing plug is pressed down when the rotary rod is screwed down so that the sealing plug only moves up and down, but not moves circularly, thus the abrasion of a conical surface or a sealing opening (a valve hole) of the sealing plug is reduced and the service life of the sealing plug is largely prolonged.

The invention discloses shelf type storage equipment capable of automatically recognizing goods. The shelf type storage equipment comprises a housing, a frame, a movable sealing door and a sliding table group, wherein the frame, the movable sealing door and the sliding table group are all arranged in the housing, an exterior facade of the frame is attached to and connected with the inner wall of the housing, the movable sealing door is arranged on one side of the frame, the top of the movable sealing door is fixedly arranged at the top of one side of the frame, the movable sealing door is arranged on one side of the movable sealing door, and the top of the movable sealing door is fixedly connected with the top wall of an inner cavity of the housing. According to the shelf type storage equipment, a channel or caterpillar type structure of a conventional commercially available retailing machine is changed, a three-dimensional shelf type structure is adopted, a moving comb plate on the sliding table group is used for lifting the goods and moves into a heating box or a cooling box to cool or heat the goods, and an automatic transportation storage manner is adopted, so that the workloadof a worker is favorably reduced, goods preparation difficulties and strength are greatly reduced, and the goods preparation and storage efficiency of the retailing machine is further greatly improved.

The invention discloses a preparation method of an omeprazole enteric capsule. The preparation method has the advantages of high stability and good in vitro dissolution curve, and can realize the consistency with original drug through human body bioequivalence tests.

The present invention discloses the printing process of making abrasive disc, and belongs to the field of machining tool making technology. The process includes the following steps: cutting hard fiber paper to the shape and size of abrasive disc base; printing one layer of bottom glue of resin on the hard fiber paper; printing one layer of mixture of emery sand and resin; and curing to obtain the product. The printing may be silk screen printing or steel plate printing; and the resin may be epoxy resin and / or phenolic resin. The present invention is suitable for making different kinds of abrasive discs.

The invention relates to the technical field of mechanical equipment, in particular to a multi-lip framework oil seal. The multi-lip framework oil seal solves the problems that the existing frameworkoil seal cannot effectively avoid the damage of the outer particles to the oil seal lip, and the ability of controlling oil seal gauze effect and the ability of protecting high value shaft parts is poor. The multi-lip framework oil seal comprises a framework and an annular oil seal body; the outer surface of the oil seal body is provided with an annular outer ring; the outer ring is aslant arranged relative to the horizontal plane, peripheral surface of the outer ring is provided with a radial direction dust prevention lip and multiple radial direction sealing lips, and the inner circumferenceof the outer ring is provided with external tension springs in the corresponding positions with each radial direction sealing lip; and the inner surface of the oil seal body is provided with an innerring, and the inner ring is matched with a rotating shaft. The multi-lip framework oil seal can avoid the damage of outer granular materials to the oil seal lip, the gauze effect in the oil seal workcan be effectively controlled and the oil seal has a compensation function of abrasion loss, the multi-lip is high in leakproofness, and maximum protection of high value parts is achieved.

The invention provides a piercing mechanism and a beverage brewing device. The piercing mechanism comprises a main body as well as a piercing component and a funnel component which are arranged on themain body, and further comprises a motor and a gear which is connected to the motor by virtue of a shaft, wherein the piercing component comprises a piercing needle; the funnel component comprises acapsule which is arranged under the piercing needle and a lower piercing needle which is arranged under the capsule; the piercing component further comprises a gear rack which is meshed with the gear,and the piercing needle is arranged under the gear rack; when the shaft, which is driven by virtue of the motor, rotates in a positive direction, the piercing needle is driven to move downwards by virtue of the gear rack, the capsule is pierced by virtue of the piercing needle and the capsule is driven to move downwards and is pierced by virtue of the lower piercing needle; or when the shaft, which is driven by virtue of the motor, rotates in a negative direction, the gear rack moves upwards, and the piercing needle is driven to move upwards and away from the capsule. The piercing mechanism provided by the invention has the beneficial effects that the capsule can be pierced through cooperation of the gear and the gear rack, and the capsule, which is uniformly stressed, cannot get burst easily; and the piercing mechanism is simple in structure and reliable in control.

The invention is suitable for the technical field of endoscopes, and provides an insertion part, an endoscope and a driving method. The insertion part comprises an insertion tube, and a first deformation body, a first driving body, a second driving body and a second deformation body which are sequentially arranged in the axial direction of the insertion tube; the first deformation body and the second deformation body can be deformed to be in contact with the inner wall of the insertion object of the insertion tube; the first deformation body can slide in the axial direction of the insertion tube, the first driving body is fixedly connected with the first deformation body, the second deformation body is fixedly connected with the insertion tube, and the relative position between the second driving body and the second deformation body is fixed; and acting force for enabling the first driving body and the second driving body to be close to or far away from each other can be generated between the first driving body and the second driving body. According to the invention, the forward movement of the insertion part in the insertion object is realized through the driving structure at the foremost end.

The invention discloses a stereo parking device. The stereo parking device comprises a bracket, a plurality of sets of driving mechanisms arranged in the longitudinal direction of the bracket at intervals, rotating substrates driven by the driving mechanisms, handover clamping claws fixedly disposed at both ends of the rotating substrates and vehicle parking baskets fixed and transported by the handover clamping claws. The stereo parking device is small in size and realizes multi-layer parking of vehicles and layer-to-layer handover; and in addition, the clamping jaws of a handover structure of the stereo parking device do not require any control means, a purely mechanical structure is used for completion, the failure rate is reduced, vigorous popularization can be performed, and significant social benefits are achieved.

The invention discloses an antiwear close-packed armor roll surface, and belongs to the field of roller presses (high-pressure roller mills). The antiwear close-packed armor roll surface comprises a roll surface base body and an antiwear armor layer, wherein the antiwear armor layer is fixed on the roll surface base body and is composed of a plurality of armor units which are tightly arranged and are fixed on the roll surface base body through bolts; and each overall armor unit is a cone body and is composed of a regular hexagonal prism body on the upper part and a cone body on the lower part. The roll surface base body disclosed by the invention is not easy to wear; the demands on the materials and the processing equipments of the roll surface base body are reduced; the fabrication cost is reduced; the roll surface disclosed by the invention is good in wear resistance and long in service life; and a surface wear-resisting layer is not easy to wear, can be used at relatively high temperature and is easy to assemble and disassemble.

An electronic product, comprising: an optical fingerprint sensor, the optical fingerprint sensor including a pixel substrate and a flexible printed circuit board; the pixel substrate has a pixel array; the first part of the flexible printed circuit board is bound on the pixel substrate surface; an outer cover plate, the outer cover plate has an outer surface and an inner surface; the outer surface has a first blind hole, and the first blind hole is opposite to the upper surface of the pixel array; the inner surface has a A second blind hole accommodates the top of the first portion of the flexible printed circuit board. The assembly structure of the optical fingerprint sensor in the electronic product is improved, the assembly difficulty is reduced, and the cost is reduced.