2538 results about "Close contact" patented technology

The invention provides a full-focusing ultrasonic imaging method for multi-modal damage of a composite material, and the method comprises the steps: calculating the correlation of the reflection intensity of a sound wave signal at different moments and spatial positions through employing an established quantitative corresponding relation, recognizing a close contact region and a loose separation region between a bonding layer and a substrate, and carrying out the recognition of the close contact region and the loose separation region. Judging the continuity distribution condition of the interface contact state; according to the continuous distribution condition of the interface contact state, key feature points of dynamic damage evolution are extracted, a time sequence analysis method is adopted to track the feature points to adapt to damage features of dynamic changes, and prediction data of the damage expansion trend are obtained; and according to the dynamic representation result of the interface state, fusing the obtained multi-period signal characteristic data, carrying out quantitative calculation on the area change of the debonding region, judging the residual distribution state of the bonding strength, and obtaining a comprehensive evaluation report of the damage degree of the bonding interface.

The invention discloses a server, which comprises a mainboard module, a liquid cooling substrate, a first heat dissipation pipeline and a second heat dissipation pipeline, and is characterized in that a plurality of heating modules on a mainboard body of the mainboard module are at least arranged at intervals along a first direction; the liquid cooling substrate covers the mainboard body, and the outer peripheral contour line of the liquid cooling substrate exceeds the outer peripheral contour line of the mainboard body; the first heat dissipation pipeline and the second heat dissipation pipeline are both embedded in the surface of the side, away from the mainboard body, of the liquid cooling substrate, and the first heat dissipation pipeline communicates with the first sub liquid cooling plate of the heating module with the maximum heat generation amount in the multiple heating modules; the second heat dissipation pipeline at least extends in a bent shape in the first direction; the liquid cooling substrate is attached to at least a part of the heating modules in the rest of the heating modules with the maximum heat production capacity. The problem that all heating elements on a mainboard of a server cannot be effectively cooled by a liquid cooling heat dissipation system in the related technology is at least solved.

The invention discloses an assemblage multi-robot collaborative welding system in ship sections, and relates to the technical field of industrial robot collaborative control, the assemblage multi-robot collaborative welding system comprises an industrial internet platform, the industrial internet platform is in communication connection with the following modules: a visual inspection modeling module, which is used for scanning the surface of a workpiece through a 3D camera, constructing a point cloud model, and establishing a point cloud model; matching the point cloud model with a design drawing, and identifying a deviation between an actual workpiece and the drawing; and the path planning and correcting module is used for planning a collision-free welding path in combination with the visual detection data and the motion range of the robot. Through high-precision visual inspection scanning and an SLAM matching algorithm, a workpiece point cloud model is constructed in real time and is accurately aligned with a design drawing, the welding seam position and the workpiece geometric deviation can be accurately recognized, a collision-free welding path is generated in combination with robot kinematics constraint and a safety boundary, it is ensured that the pose of the tail end of a welding gun is attached to the surface of the workpiece, and the welding quality is improved. Welding deviation is reduced, and process stability is ensured.

The invention discloses a polygonatum sibiricum polysaccharide extracting solution concentration scraper, and belongs to the technical field of concentration scrapers. Comprising a hollow rod, a mounting box is fixedly connected to the top end of the hollow rod, a connecting plate is fixedly connected to the upper surface of the mounting box through a plurality of bolts, and a hollow main shaft is fixedly connected to the center of the upper surface of the connecting plate; air is supplied to the fixing box through the air conveying pipe, the U-shaped pipe, the communicating pipe and the hose, the piston plate is pushed to drive the supporting rod and the scraper body to extend outwards, initial close contact between the scraper and the inner wall of the evaporation barrel is achieved, and meanwhile a second spring in the supporting rod can adjust contact pressure in a self-adaptive mode to ensure that the supporting rod is tightly attached to the inner wall of the evaporation barrel; meanwhile, the first spring is matched to drive the scraper body to be stably retracted when gas is stopped, the problem of gaps after long-term use is thoroughly solved, uneven film formation caused by missing scraping is avoided, materials are prevented from being retained in the gaps and being overheated and carbonized, and the purity and activity of the polygonatum sibiricum polysaccharide are guaranteed.

The invention provides a tool applied to the field of petroleum drilling, and particularly relates to an electrically-controlled reducing cutter, which has the technical scheme that the extension and retraction of the cutter are accurately controlled by a control base driving motor and an electromagnet, wherein the control base driving motor comprises an MCU (Microprogrammed Control Unit) and a wireless communication module; the control base can receive a ground instruction and transmit an underground working state signal back in real time; meanwhile, the ratchet mechanism is matched with the electromagnet to achieve extending and retracting of the cutter position, and the pawl is always in close contact with the ratchet wheel under the action of the spring. And the lower shell is in threaded connection with the guide shoe. The cutting knife is driven to rotate through the transmission shaft, the cutting knife is controlled to stretch out and retract through the intelligent electric control system, continuous cutting of casing pipes with different pipe diameters can be achieved, the tripping frequency is reduced, and the casing pipe cutting efficiency in the well abandoning operation process is greatly improved.

A sight mounting system (300; 400) for mounting an optical sight (200; 500) to a firearm, comprising: a sight mounting interface (110; 410), and an oblong dovetail member (305), wherein the oblong dovetail member (305) is arranged to be forced in close contact with a leaning back wall (125) of the sight mounting interface (110) and a leaning rear face (240; 540) of the optical sight (200; 500), wherein the leaning front face (245; 545) of the reflex sight is forced against the leaning front wall (135) of the sight mounting interface (110). An optical sight (200) for mounting to a sight mounting interface (110; 410), and an adapter plate for mounting a sight to a sight mounting interface

To provide a high efficiency light guide element.SOLUTION: A light guide element has a first light guide portion that propagates a light beam incident thereon while reflecting the light beam therein, and a second light guide portion that emits the light beam from the first light guide portion part by part while reflecting the light beam therein. A first optical film 10-i is provided on the first light guide portion, and a second optical film 11-i different in characteristics from the first optical film is provided on the second light guide portion to be adjacent to the first optical film. A first light guide member 1-i constituting the first light guide portion and a second light guide member 1-ii constituting the second light guide portion are closely adhered or joined to each other.SELECTED DRAWING: Figure 1

The utility model relates to the technical field of beam-pumping units, in particular to a horsehead receding device of a pumping unit. Comprising a horse head rotationally connected with one end of a walking beam, the horse head comprises two side plates fixedly connected, two lug plates are fixed between the two side plates and fixedly connected through a vertical rotating shaft, the rotating shaft is rotationally connected with one end of the walking beam, a square rod is arranged on the walking beam in a sliding mode, and a telescopic rod can drive the square rod to slide. A fixing rod is fixed to the lower end of the square rod, a push rod is fixed to the lower end of the fixing rod, a rack is fixed to the end, away from the fixing rod, of the push rod, and a gear ring is concentrically and fixedly arranged on the rotating shaft in a sleeving mode. The electric telescopic rod drives the square rod to slide, manual climbing operation is not needed, and potential safety hazards of climbing operation in a traditional device are thoroughly eliminated.

Disclosed is a tape measure which includes a first housing module including a first housing providing a spring space on one side, a rotational shaft mounted rotatably on the first housing, a spring located in the spring space, the spring coupled to the first housing by one end and coupled to the rotational shaft by the other end, and a first cover covering the spring space, an installable bobbin rotatably mounted around the rotational shaft while being in close contact with the rotational shaft or the first cover of the first housing module is wound, and a second housing module including a second housing assembled with the first housing and a power transmission part for transmitting the rotation of the rotational shaft to the bobbin, wherein the first housing, the spring, the rotational shaft, the power transmission part, and the bobbin are mechanically connected when the bobbin is installed onto the first housing module and the second hosing module is assembled to the first housing module.

The application provides a heating and pressing device and an operation method thereof. The device comprises a substrate with a loading area, an operation window is opened on the loading area, a secondary material positioning mechanism is arranged at the operation window, a primary material positioning mechanism is arranged on the side of the loading area, a top suction assembly is arranged below the loading area, a heat pressing area is formed between the top suction assembly and the secondary material positioning mechanism, a heating and pressing mechanism is arranged on one side of the heat pressing area, the heating and pressing mechanism comprises a moving assembly, a downward pressing and heating assembly and a side pressing and heating assembly are connected to the moving assembly, the downward pressing and heating assembly is arranged above the heat pressing area, and the side pressing and heating assembly is arranged on the side of the heat pressing area. The X and Y direction pushing and pressing structure is matched with the suction and positioning structure to ensure the close contact and position accuracy of small parts and products, improve the assembly effect, optimize the product quality, improve the product yield, and increase the economic benefits. The flexible material is used for pressing and heating, so that the elastic buffer pressure is provided, and the product surface is protected.

The invention discloses a timing system with an anti-disassembly function, and relates to the field of coach car data collection, and the system comprises an anti-disassembly label which is installed in a coach car; the anti-tamper detection module is installed in close contact with the anti-tamper tag, and the anti-tamper detection module internally comprises an anti-tamper tag read-write circuit so as to obtain state data of the anti-tamper tag; and the timing equipment host is connected with the anti-disassembly module and is used for periodically reading the label state data so as to automatically trigger an anti-disassembly response when the state of the label state data is lost or the communication is interrupted. The tamper detection module is physically attached to the label, label information is continuously read and written, the host polls and verifies the state regularly, once the label leaves, is disconnected or is shielded, abnormity can be detected, response is timely and accurate, and the problem of misinformation caused by physical false triggering is avoided.

The invention discloses a testing device, which comprises a platform, a supporting seat, a pressure applying rotating shaft and a driving part, and is characterized in that the platform is provided with a fixing part, and the fixing part is used for fixing an axial air foil bearing; the supporting seat is located above the platform and installed on the platform, a shaft hole is formed in the supporting seat, and the shaft hole is located over the fixing part and penetrates through the supporting seat in the vertical direction; the pressing rotating shaft is movably arranged in the shaft hole in a penetrating mode in the vertical direction, and the bottom of the pressing rotating shaft is used for being attached to the axial air foil bearing in a normal state; the driving part is in driving connection with the pressure-applying rotating shaft to drive the pressure-applying rotating shaft to rotate. According to the testing device, the axial air foil bearing can be rapidly tested, and the production requirement of large-scale mass production is met.

The invention belongs to the technical field of heat-conducting composite materials, and particularly relates to a high-heat-conductivity boron nitride composite film and a preparation method and application thereof. The boron nitride composite film is prepared from the following raw materials: boron nitride nanosheets serving as heat-conducting filler; the cellulose nanofiber is used as a polymer matrix; wherein the mass ratio of the boron nitride nanosheets to the cellulose nanofibers is (4: 6)-(6: 4); the average transverse size of the boron nitride nanosheet is 3-20 [mu] m, the thickness is 48-201 nm, and the aspect ratio is greater than or equal to 200. Through combination of vacuum filtration and a cold pressing process and control of the size and the use amount of the boron nitride nanosheets, high in-plane orientation and close contact of the boron nitride nanosheets in the boron nitride composite film are realized, formation of an efficient heat conduction network is facilitated, the in-plane heat conductivity of the obtained film is up to 74.97 Wm <-1 > K <-1 >, and the in-plane heat conductivity of the obtained film is up to 74.97 Wm <-1 > K <-1 >. Meanwhile, the material has high insulativity, flexibility and thermal stability, and is suitable for the field of thermal management of electronic devices.

The utility model discloses a brake steel back blank pressing device, and particularly relates to the technical field of steel back stamping, in an initial state, a telescopic cylinder is contracted, a push-pull plate is in close contact with an elliptical surface of a connecting seat, an elastic seat is limited to pop up, a torsional spring accumulates force, after a stamping process is completed, a computer controls the telescopic cylinder to extend, the push-pull plate is far away from the connecting seat, and limitation is relieved; the rotating roller rotates under the elastic force effect of the torsional spring to drive the connecting base and the elastic base to move upwards, the elastic base pops up from the stretching-out window and the steel backing is popped up to the bearing frame, the automatic control aspect and the action from the telescopic air cylinder to the ejection of the elastic base are all controlled by a computer, manual intervention is reduced, the production accuracy and efficiency are improved, and an operator only needs to set and debug in the early stage; the push-pull plate and the telescopic air cylinder are combined to guarantee that ejection of the elastic base is limited during stamping, the elastic base can be smoothly ejected after stamping, a plurality of steel backs are stamped at a time and collected in a centralized mode, the carrying and equipment starting and stopping frequency is reduced, the working intensity of operators is reduced, and the production benefit and quality are comprehensively improved.

The utility model belongs to the technical field of laser welding, and particularly relates to a laser welding jointed board device which comprises a working table, two working frames are fixedly connected to the top of the working table, a driving mechanism is arranged between the two working frames, a laser equipment body is installed on the driving mechanism, and limiting assemblies are arranged on the two sides of the laser equipment body. Through cooperation of the limiting plates, the moving plate, the top plate and the bottom plate, a plate is placed between the two limiting plates, the limiting plates limit the plate in the middle of the moving plate, then the top plate is moved towards the bottom plate, and the plate is fixed to the moving plate through the top plate and the bottom plate; and then the motor is started, the output shaft of the motor drives the bidirectional ball screw to rotate, the bidirectional ball screw drives the movable plate to move in the opposite direction, the movable plate drives the top plate, the bottom plate and the plates to gradually move towards the middle till the two plates make close contact and stop moving, and the problem that welding deviation is caused due to the fact that the plates are not limited is solved.

The utility model discloses a metal tube processing circular cutting machine capable of preventing a metal tube from deforming, which relates to the technical field of circular cutting machines and comprises a workbench and a cutting mechanism arranged at the rear end of the top surface of the workbench. The device has the advantages that the telescopic shafts, the mounting circular plates, the electric telescopic rods and the movable blocks in the anti-deformation assemblies play key roles, the three electric telescopic rods are arranged at equal intervals, the positions of the movable blocks can be adjusted according to the inner diameter of a machining pipe, the side faces of the movable blocks make close contact with the inner side face of the machining pipe, and uniform supporting force is provided from the interior; the machining pipe is effectively prevented from deforming due to uneven stress in the cutting process, meanwhile, a mounting frame on a clamping block is combined with a first handle bolt and an arc-shaped plate, the machining pipe can be clamped and fixed from the outside, the position accuracy of the machining pipe in the cutting process is guaranteed through the internal and external dual-fixing mode, the deformation risk can be greatly reduced, and the machining efficiency is improved. And the quality and the precision of the processed pipe are improved.

The invention discloses an inner flanging bending device for a metal plate, and relates to the technical field of bending equipment, the inner flanging bending device comprises a base and a positioning frame, the top of the base is provided with a positioning plate, the top of the positioning plate is provided with a limiting plate, and the top of the limiting plate is provided with a fixing plate; and positioning assemblies for reinforcing the limiting plate are arranged at the two ends of the limiting plate correspondingly, each positioning assembly comprises a rack, a gear and a contact block, the contact blocks make contact with the outer wall of the limiting plate, and springs are arranged at the bottoms of the contact blocks. Through the arrangement of the positioning assembly, a sliding block drives a rack to move downwards, the rack drives a gear to rotate, the other set of rack drives a connecting rod to move upwards, a spring makes contact with the bottom of a contact block, the contact block is ejected upwards, and the contact block is attached to the outer wall of a limiting plate; and secondly, by arranging the shape of the contact block, the stability of the limiting plate is effectively improved when the fixing plate makes contact with the metal plate, and the phenomenon that the limiting plate shakes is greatly reduced.

The invention discloses a floor thickness detection device, and relates to the technical field of floor thickness detection, the floor thickness detection device comprises a floor, a detection host and a shielding cover, the detection host and the shielding cover are arranged at the top and the bottom of the floor, the bottom of the shielding cover is provided with a connecting seat, and an adaptive oscillator and an exchange auxiliary member are arranged between the connecting seat and the shielding cover; and the connecting rod is in threaded connection with the bottom of the connecting seat. By arranging the adaptive oscillator, the shielding cover can adaptively abut against the irregular surface of the bottom of the floor slab, the irregular surface comprises an inclined face and a protruding part, it is ensured that the shielding cover makes close contact with the floor slab, gaps caused by surface unevenness are reduced, a more stable foundation is provided for follow-up detection, and the detection efficiency is improved. The improvement of the fitting degree is helpful for the transmitting probe to transmit a detection signal more stably, and signal interference or deviation caused by a gap or poor contact between the shielding cover and the floor is reduced, so that the accuracy of floor thickness detection is improved.

The present invention provides a display device and a method for manufacturing a display device, which prevent the adhesive layer from overflowing at the outer periphery of the display cell by controlling the amount of transparent optical adhesive that constitutes the adhesive layer formed between the cover plate and the display cell. [Solution] A glass cover plate 20 and an elastomer frame member 10 are formed in close contact using a glass insert in-mold method. A weir portion 14 is formed protruding from the inner surface 14 of the frame member 10, and a weir end surface 14a is formed at the boundary with the inner surface 23 of the cover plate 20. The transparent optical adhesive applied to the inner surface 23 of the cover plate 20 can be blocked by the weir end surface 14a, preventing the adhesive layer 60a from overflowing into area (ii) in order to bond the display cell 30.

The utility model discloses a strain clamp with stable connection, which comprises a clamp body, two inner sides of the clamp body are provided with clamping pieces, the clamping pieces are provided with pushing blocks, the pushing blocks are fixedly connected with the clamp body through screws, the clamping pieces are provided with threading holes for accommodating wire groups, and the threading holes are connected with the clamping pieces through screws. The wire clamp body is provided with a plurality of wire penetrating holes, the wire penetrating holes are provided with a plurality of clamping plates at equal intervals from left to right, the inner walls of the clamping plates are provided with a plurality of tooth parts protruding at equal intervals, and springs are arranged in the clamping pieces and act on the two ends of the clamping plates so that the clamping plates can move towards the middle of the wire clamp body. The tooth part is embedded into the outer wall of the wire group, so that the friction force is enhanced; the clamping force of the clamping plate is dynamically adjusted by pushing the clamping plate through the spring according to the real-time change of the diameter of the wire set, so that the tooth part is always kept in close contact with the outer wall of the wire set, the phenomena of connection loosening and loosening are effectively prevented, and the connection stability of the wire clamp body and the clamping plate is further improved through the screw.

The present application relates to the technical field of wheel hub detection, and discloses a wheel hub bearing device and an impact testing machine, the rotation of the first angle adjusting plate is controlled by the hydraulic cylinder, the angle is adjusted with the rotating column as the shaft, the arc-shaped seat and the concave arc surface of the bearing table always keep the state of close contact, which ensures that the impact force generated by the drop hammer mechanism impacting the wheel hub is offset by the bearing table at any angle of the first angle adjusting plate within the preset range, so that the angle control of the first angle adjusting plate will not produce adjustment error due to multiple impact tests, and the bearing table effectively offsets the impact force of the drop hammer mechanism by lifting the arc-shaped seat, avoiding loosening of the triangular structure due to frequent impact. The existing bearing device of the wheel hub outer edge inclined impact testing machine is prone to loosening of the triangular structure composed of the bottom plate, the angle adjusting plate and the hydraulic cylinder during frequent impact tests, which leads to the decline of the inclination angle adjustment precision of the angle adjusting plate and the failure of the hydraulic cylinder, affecting the accuracy of the test and the reliability of the equipment.

The utility model provides a faucet shell and a mould, the faucet shell comprises a metal outer shell and a plastic inner pipe body, the plastic inner pipe body is arranged in the metal outer shell, and the plastic inner pipe body is in close contact with the inner wall of the metal outer shell; the metal outer shell comprises a first metal outer pipe, one side of the first metal outer pipe is integrally connected with a second metal outer pipe, and the first metal outer pipe is communicated with the second metal outer pipe; the plastic inner pipe body comprises a first plastic inner pipe, one side of the first plastic inner pipe is integrally connected with a second plastic inner pipe, and the first plastic inner pipe is communicated with the second plastic inner pipe. According to the utility model, the overall stability is strong, and the overall texture and attractiveness are high; when water flows in the plastic inner pipe body, the water does not make contact with the metal outer pipe, the metal outer shell cannot be oxidized by the water, microelements cannot be released into the water, and the water pipe is green, environmentally friendly and long in service life. The plastic inner pipe can be prevented from sliding and loosening from the metal outer pipe.

The utility model discloses a multi-stage buffering column nail roller structure which is composed of a column nail piece, a buffering piece, nail holes and a roller sleeve structure. And the surface of the buffer piece is coated with fixing glue, and then the buffer piece is pressed into the bottom of the nail hole in a high-pressure press-fitting mode. The fixing glue can enable the buffering piece to be tightly combined with the bottom of the nail hole, and meanwhile the effect of buffering stress is achieved to a certain degree. High-pressure press fitting can ensure that the buffer piece is firmly mounted, and the buffer piece can better adapt to the shape and the size of a nail hole. And the surface of the column nail piece is coated with the fixing glue, and then the column nail piece is pressed into the nail hole in a high-pressure press-fitting mode. At the moment, the column nail piece is in close contact with the buffering piece, and the tiny gap between the column nail piece and the nail hole is filled with the fixing glue, so that the column nail piece, the buffering piece and the nail hole form a whole.

The utility model provides a deep perforating device for roadbed settlement reinforcement, which relates to the technical field of building construction and comprises a triangular bottom plate. Three groups of balance plates are annularly arranged on the triangular bottom plate, a supporting vertical plate is vertically arranged on the upper end face of the triangular bottom plate, a triangular top plate is fixedly connected to the top of the supporting vertical plate, and two guide columns are fixedly connected between the triangular top plate and the triangular bottom plate; by arranging the drilling and smoothing mechanism, after drilling operation is completed, a rotating rod slowly stretches out towards the earth surface direction, meanwhile, reverse accelerated rotating motion is conducted, and by means of inertia of an inertia balance weight piece, a traction rod forwards pushes a balance weight block to be separated towards the outer side; at the moment, the smoothing arc plate makes contact with the inner wall of the drill hole, the balancing weight exerts pressure, and the smoothing arc plate is tightly attached to the inner wall of the drill hole to do high-speed rotating motion, so that the inner wall is smoothed, the concave-convex degree of the inner wall is effectively reduced, and favorable conditions are created for follow-up steel bar implanting work; the problem that after an existing foundation punching device completes punching operation, the hole wall is obviously uneven is solved.

An electronic device is provided that includes a housing including a key hole and a vent hole, a button member including a body part disposed to cover the key hole and the vent hole, and a button protrusion inserted into the key hole, a substrate member including a switch actuated based on the button protrusion, a base disposed between the housing and the substrate member to cover the substrate member, a waterproof member including a sealing part, formed to protrude from the base to surround a perimeter at least one of the key hole and the vent hole, which has at least a part in close contact with the outer wall, a conduit for connecting an internal space and outside of the electronic device through the vent hole, and a waterproof cover disposed on the conduit so as to block moisture flowing in through the vent hole.

The invention discloses a device and method for accelerating the leveling speed of a liquid film on the surface of a substrate, and belongs to the technical field of semiconductor manufacturing. The device adopts a positive and negative pressure combined mode of an air floating platform to support the substrate, and a platform body of the air floating platform is divided into a plurality of independently controlled ventilation areas; air is blown to the substrate body through the ventilation areas by controlling opening and closing of the electromagnetic valves and pressure adjustment of the positive and negative air paths, and partition control is more stable and precise. The surface liquid film attached to the substrate body can be driven to be quickly leveled by adjusting the positive pressure blowing and / or the negative pressure corresponding to the negative pressure airflow intensity and adjusting the on-off of the positive pressure air path and / or the negative pressure air path. By means of the design, accelerated leveling of a large-area substrate ultrathin liquid film can be achieved, and the leveling efficiency and the leveling quality of the liquid film on the surface of the substrate are improved; and the method is particularly suitable for manufacturing high-resolution and large-format displays, electronic components and the like by utilizing ink-jet printing.

The utility model discloses a COME board with ECC memory expansion interface, include: mainboard body, the mainboard body surface panel carries memory one side is equipped with the on -board expansion seat for the memory expansion of mainboard storage and operation, the on -board expansion seat upper end is equipped with the memory pressure plate for the compression of memory combination after expansion switching over through the slot hole of surface both ends, the utility model discloses the cooperation of positioning stand and memory positioning hole, realize the three -dimensional space orientation of memory stick main body on the mainboard body, avoid horizontal or longitudinal displacement, simultaneously, the memory pressure plate is connected through locking screw and the locking slot of on -board expansion seat, forms the even compression force to memory expansion switching over board, ensures the close contact of memory stick main body and memory slot, memory switching over plug and memory expansion slot, significantly improves the connection reliability under the complex environment such as vibration, high temperature, and prevents the data transmission unstable problem caused by poor contact.

A kind of metal composite board precision machining device, including workbench, the top of workbench is sequentially spaced apart along its length direction and is equipped with feeding assembly, alignment assembly and forming assembly, the feeding assembly includes two groups of interval arrangement support, each group of support includes two opposite interval arrangement support plate, two parallel interval arrangement feeding rollers are rotatably installed between the two support plates of same group, two auxiliary rollers are rotatably arranged between the two feeding rollers, and the feeding gap for the passage of plate is formed between the two auxiliary rollers and corresponding feeding roller respectively;Two support plates arranged on the same side are fixedly provided with connecting plate between them, and cleaning assembly for removing impurities and cleaning the joint surface of base plate and cover plate is slidably arranged between the two connecting plates, and reciprocating assembly for driving cleaning assembly to reciprocate is symmetrically arranged between cleaning assembly and feeding roller. Avoiding impurities to be pressed and embedded in interlayer bonding interface under subsequent rolling pressure, the close contact of two sides fresh metal matrix is blocked.

The invention discloses a heat dissipation piece and an electronic device. The heat dissipation piece comprises a body and a matching part, the body comprises a heat dissipation area and a contact area, the contact area is connected to the heat dissipation area, and the contact area is configured to abut against the heat conduction piece and be attached to the heat conduction piece. The matching part is arranged on the body and is configured to reduce the pressure of the heat dissipation piece on the heat conduction piece when the contact area abuts against the heat conduction piece. According to the heat dissipation piece and the electronic device, due to the arrangement of the matching part, it can be ensured that when the contact area abuts against the heat conduction piece, the contact area makes close contact with the heat conduction piece, the heat transfer performance between the contact area and the heat conduction piece is improved, and the pressure applied to the heat conduction piece by the heat dissipation piece can be reduced when the contact area abuts against the heat conduction piece; therefore, the pressure applied to the heat dissipation target by the heat conduction piece can be reduced, the possibility that the heat dissipation target is damaged due to stress extrusion of the heat conduction piece is reduced, the service life of the circuit board is prolonged, the use performance of the heat dissipation target is guaranteed, and the working stability and reliability of the circuit board are improved.

The application relates to a modular arm cylinder, which comprises a support and a retractable arm cylinder. The support comprises a plurality of assembly seats which are sequentially and detachably connected in a head-to-tail mode to form a cylindrical structure with a mounting cavity. The retractable arm cylinder comprises a variable-diameter ring and a tooth belt. The variable-diameter ring is circumferentially arranged in the mounting cavity and is arranged in close contact with the cavity wall. One end of the tooth belt is arranged on the side of the support away from the mounting cavity, and the other end of the tooth belt is arranged through the support and connected with the variable-diameter ring. In the utility model, the assembly seats bear and install the retractable arm cylinder. The size of the mounting cavity formed by the mutual connection of the assembly seats can be adjusted by adjusting the size of the assembly seats. Since the support is sequentially and detachably connected in a head-to-tail mode by the plurality of assembly seats, the support can be quickly disassembled, the internal structure of the sphygmomanometer can be simplified, and the production cost of the sphygmomanometer is reduced.