42results about How to "Has a supporting effect" patented technology

The invention provides a three-dimensional heat-insulating reinforced concrete liner for mines. The three-dimensional heat-insulating reinforced concrete liner consists of two parts of a three-dimensional reinforced mesh casing bracket and a heat insulating support concrete spraying layer, wherein the three-dimensional reinforced mesh casing bracket is a full-closed three-center arch which is spliced from several mesh casing structural members and is fixed on the surface of country rock, so that an external support framework is formed, ground pressure is jointly withstood by the external support framework and a rock consolidation ring; heat insulating support concrete is formed by mixing haydite, vitrified micro bubbles, polypropylene fibers and common concrete, and is packed in the mesh casing bracket. The vitrified micro bubbles and haydite form a porous structure in the concrete, so that the coefficient of thermal conductivity is effectively reduced, and concrete has a good heat-insulating effect; the heat insulating concrete is sprayed and coated to a three-dimensional reinforced mesh casing, the concrete is packaged in numerous small-span bidirectional reinforcing bar arch casings, pulling and shearing stress borne by the spraying layer is obviously reduced, and the compressive strength is fully utilized, so that the requirement for the heat insulating support of tunnels can be well met, the healthy body and mind of staff working underground can be guaranteed, and the working efficiency in the underground mines is improved.

The invention provides a fermentation tank cleaning device, and relates to the field of fermentation tank cleaning. The fermentation tank cleaning device comprises a driving motor, a fermentation tank, a mounting frame, a bottom plate and a spraying mechanism; the driving motor is arranged on the outer wall of the top end of the fermentation tank; an output shaft of the driving motor is provided with an electric telescopic rod through a coupler; the mounting frame is arranged on the outer wall of the top end of the fermentation tank; the spraying mechanism comprises a water inlet pipe, a hose and a spray head; one end of the spray head is fixedly connected with the electric telescopic rod, and one end of the hose is connected with the water inlet pipe; and the spray head is communicated with the other end of the hose. According to the fermentation tank cleaning device, the bottom plate can drive impurities to enter a cleaning groove, the problem that impurities at the bottom end of a fermentation tank are not easy to clean is solved, the bottom end can be conveniently cleaned by the spray head, meanwhile, the bottom plate can repeatedly move up and down, caked impurities are crushed and rapidly fall off, and the impurities can conveniently flow out of a liquid outlet cavity along with water flow.

The invention discloses a construction process of a dry-work hole cast-in-place pile penetrating through a karst cave. First, a dry-work method bored cast-in-place pile construction process is used toform a hole in an overbarden layer of the karst cave; then a filling body is prepared, and the filling body includes an inner core and an outer shell wrapping around the inner core; afterwards, the filler body is placed inside the karst cave in a compression state, and rebounded and unfolded in the karst cave; afterwards, a grouting guide pipe is used to pour cement slurry into the inner core ofthe filler body, and the cement slurry permeates into the inner core through a porous structure; after the cement slurry in the inner core of the filling body is solidified, excavating is carried outfrom the top of the filling body by using the bored cast-in-place pile construction process, after the filling body is penetrated, and forming hole in the lower part continues to be carried out untilthe drilling depth reaches the design depth of a pile body, drilling is stopped; and afterwards, a reinforcement cage of the pile body is lowered, concrete pouring of the pile body is carried out, andthe pile foundation construction is completed. The construction process adopts a brand-new method to solve the problem of slurry leakage in the construction of the cast-in-situ pile in a karst cave area, the construction is easy and the cost is low, and the construction process has a large value of popularization and application.

The invention provides a device for testing sudden pulling of a foot-hanging type drawer slide rail, and belongs to the technical field of drawer testing device. The foot-hanging type drawer slide rail comprises a frame including a pedestal, a lifting guide pillar, a lifting platform and a front baffle plate, wherein the lifting guide pillar is vertically fixed on the pedestal, the lifting platform sleeves the lifting guide pillar and moves up and down along the lifting guide pillar, the front baffle plate is fixed on the front end of the pedestal, a screw vertically penetrates through the lifting platform, a motor driving the driving screw is fixed on the pedestal, a cylinder is fixed on the upper end face on the plate-shaped lifting platform, and a horizontally arranged sliding bar is fixed on the front end face of the lifting platform. A slide block moves horizontally along the sliding bar is arranged on the sliding bar, and the slide block is fixedly connected with a push rod of the cylinder. A hook clamping a foot-hanging type drawer handle is fixed on the front end face of the slide block. The lifting platform vertically slides along the lifting guide pillar, and the application scope is expanded. The front baffle plate abuts against a drawer cabinet, thereby increasing the stability during test.

The invention discloses a camera device and electronic equipment. The camera device comprises: a seat body, which comprises an accommodating groove; a camera, wherein at least part of the camera is located in the accommodating groove; a guide part, which is arranged in the accommodating groove; a rolling structure, which is in rolling connection with the guide part; a guide rail, which is arranged on the camera, wherein the rolling structure is slidably connected with the guide rail; and a driving structure, which drives the camera to rotate relative to the accommodating groove through the rolling structure. Through the cooperation structure of the limiting seat body, the camera, the guide part, the rolling structure and the guide rail, the camera rotates along the guide rail with the rolling structure as a fulcrum, the length of the guide rail limits the rotation angle of the camera relative to the accommodating groove, the distribution direction of the guide rail limits the rotation direction of the camera relative to the accommodating groove, and the camera can rotate by a large angle relative to the accommodating groove through the rolling structure, so effective structural support is provided for anti-shaking of the camera with a large deflection angle, and the anti-shake effect of a product is good.

The invention relates to a method for brazing dissimilar materials, in particular to a method for brazing dissimilar materials through assistance of a carbon nano tube sponge middle layer and aims atsolving the problem that an existing metal material and dissimilar material brazed joint is low in strength. The method comprises the following steps that carbon nano tubes are mixed with a strong acid solution for ultrasonic cleaning, the obtained solution is dispersed into deionized water, suction filtration is conducted, an obtained filter cake is ultrasonically dispersed into absolute ethyl alcohol, centrifuging is conducted, and a supernatant is obtained; then suction filtration and drying are conducted, and finally brazing is conducted on the dissimilar materials. Or the carbon nano tubes are mixed with the strong acid solution for ultrasonic cleaning, then the obtained solution is dispersed into the deionized water, suction filtration is conducted, the filter cake is ultrasonicallydispersed into the absolute ethyl alcohol, centrifuging is conducted, and the supernatant is obtained; and brazing filler metal powder is added into the supernatant, then suction filtration and dryingare conducted, and finally brazing is conducted on the dissimilar materials. The preparation method of carbon nano tube sponge is simple and low in cost, agglomeration of the carbon nano tubes in thebrazing process can be avoided, and interface structure regulation and control, brazing seam performance enhancement, joint residual stress relief and joint strength improvement are facilitated. Themethod is suitable for brazing the dissimilar materials.

The invention discloses a Bluetooth headset mainboard with an anti-shock and anti-drop structure and a buffering function, and relates to the technical field of Bluetooth headset mainboards, and particularly relates to a Bluetooth headset mainboard comprising a mainboard body and an adapter plate, mounting grooves are formed in the four corners in the mainboard body, fastening discs are arranged in the mounting grooves, air bags are arranged in the fastening discs, and the air bags are connected with the adapter plate. And connecting holes are formed in the air bag and the fastening disc, fastening blocks are installed in the connecting holes in a threaded mode, and a first protection pad is installed on the outer surface of the fastening disc. According to the Bluetooth headset main board with the anti-shock and anti-falling structure and the buffering function, the auxiliary board can rotate by utilizing the design of the clamping block, and a certain damping effect exists between the auxiliary board and the clamping block, so that the auxiliary board can be flexibly positioned, and when the main board body is used, the main board body is prevented from falling off. And the main plate body can be supported from the exterior of the main plate body through the stabilizing columns arranged in the auxiliary plate, the main plate body can be protected from the exterior of the main plate body, and the service life of the main plate body is prolonged.

The invention discloses a folding guitar, which comprises a guitar body, a first supporting rod and a second supporting rod, wherein the guitar body is in a long rod shape, and comprises a body, a neck, a head and multiple strings; the first supporting rod is in a long strip shape and is combined on the back surface of the body and can swing to the back of the body to present a parallel overlapping shape; a concave part in a concave arc surface shape is formed at one end of the first supporting rod for supporting the arm of a user; the second supporting rod is in a long strip shape and is combined on the back surface of the body and can swing to the back of the body to present a parallel overlapping shape; a convex part corresponding to the concave part in the shape is formed at one end ofthe second supporting rod, and the convex part is just correspondingly embedded in the concave part. Thus, the first supporting rod and the second supporting rod can be folded at the back of the body, the size is greatly reduced, effects of not occupying space and facilitating folding, unfolding and carrying are further achieved, and after unfolded, the first supporting rod and the second supporting rod can be adjusted to the best supporting mode for being used according to personal needs.

The invention relates to the technical field of curing pedestals, and discloses a capping beam prefabricating and intelligent curing pedestal which comprises a supporting frame, the upper portion of the supporting frame is used for placing a prefabricated concrete member, the supporting frame comprises a second supporting plate, and the second supporting plate is provided with a spraying mechanism for spraying the concrete member and a water supply mechanism for supplying water to the spraying mechanism; and the spraying mechanism comprises a water outlet main pipe, a feeding pipe is arranged on the side, close to the water supply mechanism, of the water outlet main pipe, a first material outlet pipe is fixedly connected to the side, away from the water supply mechanism, of the water outlet main pipe, a second material outlet pipe is fixedly connected to the side surface of the first material outlet pipe and sleeved with a water outlet pipe, and the tail end, away from a water inlet main pipe, of the second water outlet pipe is connected with a nozzle. The capping beam prefabricating and intelligent curing pedestal has the effect of spraying the concrete member on the curing pedestal.

The invention discloses a combined degradable mulching film which comprises a double-layer biodegradable porous film layer. An interlayer of the double-layer biodegradable porous film layer is filledwith a nutrient layer, and a supporting framework layer is arranged below the double-layer biodegradable porous film layer. Each layer of the double-layer biodegradable porous film layer is 100-1000 pores per square meter in porous density. The supporting framework layer is a supporting frame in a shape of a Chinese character 'tian' and provided with splicing clamping grooves. The combined degradable mulching film has great heat preservation performance, breathability and degradability and has advantages of recyclability, low cost and convenience in use.

The invention discloses single-hole multi-channel approach equipment for endoscopic surgery, belongs to the technical field of medical equipment. The single-hole multi-channel approach equipment is characterized by comprising a cover body and a channel pipe, wherein a mounting base is fixedly connected to the top of the cover body, and a first surgical instrument pipe, a second surgical instrument pipe, a third surgical instrument pipe and a fourth surgical instrument pipe respectively communicate with the top of the mounting base; and the first surgical instrument pipe, the second surgical instrument pipe, the third surgical instrument pipe and the fourth surgical instrument pipe sequentially pass through the mounting base, and the cover body extends to the inner part of the cover body. By arranging a clamping ring, when a medical worker mounts the cover body, the cover body is placed in a connecting sleeve, so that the bottom of the clamping ring makes contact with the top of the sealing ring, and then the cover body is rotated to enable the clamping ring to rotate in the connecting sleeve. Inclined blocks which are fixedly connected to the top of the clamping ring and are annularly distributed are clamped into the bottoms of inner wall pressing blocks of the connecting sleeve, and pressure between the clamping ring and the sealing ring can be increasingly increased under the rotating action of the inclined blocks till clamping of the clamping ring is achieved.

The invention provides an anti-falling device for a building component for building construction. The anti-falling device comprises a base and a support arranged on the base; a plurality of anti-falling buffering structures are arranged on the support at equal intervals; a transverse air bag assembly is arranged between every two anti-falling buffering assemblies; an extensible bearing mechanism is further arranged on the base below the anti-falling buffering structures; a camera is arranged on the top of the support; and an electric control circuit of the camera is connected with the controller. The anti-falling device for the building component for building construction has the beneficial effects that the multiple layers of transverse air bags of the anti-falling device of the building component for building construction have the effects of blocking and damping a high-altitude falling object, even if the high-altitude falling object is not blocked by the transverse air bag layers and reach a horizontal plane formed by stretching of the extensible bearing mechanism, the high-altitude falling object can be stably received, and the whole high-altitude falling object intercepting process is accurate, smooth and good in stability, multi-layer damping intercepting is achieved, and buffering and intercepting of high-altitude falling are effectively achieved.

The invention discloses a novel PE pipe preparation device, which comprises an extruder main body for extruding polyethylene particles into a pipe structure and a base fixedly mounted at the bottom of the extruder main body, the base is used for bearing the extruder main body, a water tank is arranged on the base, and the water tank is used for collecting cooling water for cooling; a rolling mechanism arranged on the periphery of the pipe and used for dragging and assisting the movement of the pipe and cooling the pipe; and supporting mechanisms are symmetrically arranged on the base, and the supporting mechanisms are used for supporting the rolling mechanism on the base. According to the novel PE pipe preparation device provided by the invention, a gap exists between a first rolling wheel and the pipe, the gap is filled with cooling water flowing out of a water outlet, the flow speed of the cooling water is reduced after the cooling water is buffered by the first rolling wheel, and due to the surface tension effect of water, the pipe is comprehensively wrapped, so that the pipe can be very effectively cooled in the pipe output process.

The invention discloses a transverse reinforcement grouting and underpinning working well. The transverse reinforcement grouting and underpinning working well comprises an annular pile and a bottom sealing pipe; the annular pile is an approximate circular-arc column formed by annularly connecting at least four pile bodies in a lap-joint mode; the bottom sealing pile is arranged at the bottom of a middle through hole of the annular pile and connected with the pile bodies of the annular pile in a lap-joint mode; an approximately-cylindrical working well space is formed by the middle through hole of the annular pile and the bottom sealing pile; each pile body of the annular pile is provided with at least one reinforcement pipe penetrating through the pile body from top to bottom. The invention further provides a manufacturing method of the transverse reinforcement grouting and underpinning working well. Accordingly, the working well is formed through high-pressure jetting grouting and can provide a construction space and a construction operating plane for transverse reinforcement grouting and underpinning of various complex strata.

The invention discloses a timber cutting machine. The timber cutting machine comprises a base; a stand column is fixedly connected to the middle of the right side of the top of the base; a force arm is arranged on the left side of the top of the stand column; a motor is fixedly connected to the middle of the end, away from the stand column, of the force arm; an output shaft of the motor is rotationally connected with a connector; and a cutter is fixedly connected to the outer surface of the connector; an adjusting device is arranged in the middle of the left side of the top of the base; and aconnecting device is fixedly connected to the top of the adjusting device. The timber cutting machine relates to the technical field of timber processing. According to the timber cutting machine, theadjusting device rotates at the top of the base to conduct rotary adjustment, before work, the adjusting device conducts adjustment and then is fixed, different positions of the same timber are cut, the situation that the timber is prone to damage due to shaking during cutting is avoided, and due to the arrangement of a side plate and a top plate, a shell have large bearing force before and afterwork; therefore, a heavier object is further supported, and the device is not prone to deformation.

The invention discloses an automatic opening and closing structure for a retractable umbrella. The automatic opening and closing structure comprises an umbrella rod and an opening and closing device; the opening and closing device comprises a flexible steel bar, a telescopic connecting piece and a steel bar driving device; the steel bar driving device is arranged at the lower end of the umbrella rod; one end of the flexible steel bar is connected with the upper end of the umbrella rod, and the other end of the flexible steel bar is connected with the steel bar driving device; the upper end of the telescopic connecting piece is connected with the upper end of the umbrella rod; the lower end of the telescopic connecting piece is connected with the lower end of the umbrella rod; a fixing hole allowing the flexible steel bar to penetrate is formed in the telescopic connecting piece;the telescopic connecting piece comprises a first connecting single body and a second connecting single body which are arranged at intervals. Compared with the prior art, the opening and closing structure is firm and compact, and can stably stretch out and draw back the umbrella rod. The invention also discloses an automatic retractable umbrella. The automatic retractable umbrella further comprises umbrella ribs and an umbrella cover; the umbrella ribs are connected with upper nests and lower nests; and the umbrella cover is connected to the umbrella ribs. Compared with the prior art, the automatic retractable umbrella can be automatically and stably opened and closed, is high in the structural strength, and convenient in opening and closing operation.

The invention relates to a hand-held immunoquantitative analyzer which comprises a hand-held mechanism and a main body; the main body is positioned on the outer side of the lower end of the hand-heldmechanism; an instrument stand is arranged in the middle of the main body; a lateral connecting penetrating groove is formed in the top end of the instrument stand; a clamping groove is formed in thetop end of the lateral connecting penetrating groove; a lateral connecting penetrating column is fixed to the middle of the lateral connecting penetrating groove; a clamping block is welded to the upper wall of the lateral connecting penetrating column; an inner connecting groove is formed in the outer side of the clamping block; side connecting mechanisms are connected to the left end and the right end of the main body; and supporting mechanisms are connected to the left side and the right side of the bottom end of the main body. The hand-held immunoquantitative analyzer has the beneficial effects that the hand-held immunoquantitative analyzer is provided with a fixed clamping column, a connecting bolt, a connecting inserting groove, a connecting rope and a connecting groove, an upper fixed seat is placed on the outer side of a penetrating connecting seat through the connection between the fixed clamping column and the connecting groove, and meanwhile, through the connection between the connecting bolt and the connecting inserting groove, the upper fixed seat and the penetrating connecting seat are clamped and positioned.

This application relates to the technical field of maintenance pedestals, and discloses a prefabricated and intelligent maintenance pedestal for cover beams, which includes a support frame on which prefabricated concrete components are placed, and the support frame includes a second support plate on which It is equipped with a spray mechanism for spraying concrete components and a water supply mechanism for water supply to the spray mechanism; the spray mechanism includes a main water outlet pipe, and a feed pipe is provided on the side of the main water outlet pipe close to the water supply mechanism, and the main water outlet pipe is far away from the side of the water supply mechanism The first discharge pipe is fixedly connected, the side of the first discharge pipe is fixedly connected with the second discharge pipe, the second discharge pipe is provided with a water outlet pipe, and the end of the second water outlet pipe far away from the water inlet main pipe is connected with a nozzle; The application has the effect of spraying the concrete components on the maintenance pedestal.

The invention relates to a hand-held immunoquantitative analyzer which comprises a hand-held mechanism and a main body; the main body is positioned on the outer side of the lower end of the hand-heldmechanism; an instrument stand is arranged in the middle of the main body; a lateral connecting penetrating groove is formed in the top end of the instrument stand; a clamping groove is formed in thetop end of the lateral connecting penetrating groove; a lateral connecting penetrating column is fixed to the middle of the lateral connecting penetrating groove; a clamping block is welded to the upper wall of the lateral connecting penetrating column; an inner connecting groove is formed in the outer side of the clamping block; side connecting mechanisms are connected to the left end and the right end of the main body; and supporting mechanisms are connected to the left side and the right side of the bottom end of the main body. The hand-held immunoquantitative analyzer has the beneficial effects that the hand-held immunoquantitative analyzer is provided with a fixed clamping column, a connecting bolt, a connecting inserting groove, a connecting rope and a connecting groove, an upper fixed seat is placed on the outer side of a penetrating connecting seat through the connection between the fixed clamping column and the connecting groove, and meanwhile, through the connection between the connecting bolt and the connecting inserting groove, the upper fixed seat and the penetrating connecting seat are clamped and positioned.

The invention discloses an automatic telescopic umbrella capable of being stably opened and closed. The automatic telescopic umbrella comprises an umbrella handle and an opening and closing device, wherein the opening and closing device comprises a flexible steel bar, a telescopic connecting piece and a steel bar driving device, the steel bar driving device is arranged at the lower end of the umbrella handle, one end of the flexible steel bar is connected with the upper end of the umbrella handle, and the other end of the flexible steel bar is connected with the steel bar driving device; the upper end of the telescopic connecting piece is connected with the upper end of the umbrella handle, the lower end of the telescopic connecting piece is connected with the lower end of the umbrella handle, the telescopic connecting piece is provided with a fixing hole for the flexible steel bar to penetrate through, the telescopic connecting piece comprises connecting single bodies, every two adjacent connecting single bodies are connected through an elastic rope, and a steel bar driving device comprises a motor and a driving wheel; a power output end of the motor is connected with the transmission wheel, spiral driving teeth are arranged on the outer circumferential face of the transmission wheel, and inclined strip-shaped holes matched with the spiral driving teeth are formed in the sideface of the flexible steel bar.

The invention provides a combined pile supporting structure for a cylindrical foundation pit and a construction method. The combined pile supporting structure comprises a supporting pile enclosure structure, an annular inner support and a hydraulic jack counterforce system located between the supporting pile enclosure structure and the annular inner support. The enclosure structure is an annular enclosure structure defined by H-shaped steel and U-shaped steel sheet piles in a staggered mode. The hydraulic jack counterforce system comprises a hydraulic control system and a plurality of hydraulic jacks arranged between the support pile enclosure structure and the annular inner support in a scattered mode. In the construction enclosure structure, the lateral rigidity of the cylindrical foundation pit is controlled and improved through the servo hydraulic jacks; meanwhile, the support pile soil pressure and the inner support axial force are monitored for early warning. The construction method and equipment have the advantages of being simple in construction process, small in construction machinery, small in occupied area, formed by prefabrication and assembly, high in adaptability and rapid in construction, having the double effects of supporting and water stopping, and having high application and popularization value.

The invention discloses a glue adhesion testing device which comprises a cabinet body, machine shells are welded to the surfaces of the two sides of four supports of the cabinet body through supporting plates respectively, a power distribution box is assembled on the surface of one side of each machine shell through bolts, and a single-chip microcomputer is arranged on the inner wall of the powerdistribution box. The single-chip microcomputer is electrically connected with a control button through line cooperation, the single-chip microcomputer is electrically connected with a timer arrangedon the machine shell through line cooperation with the control button, and the single-chip microcomputer is electrically connected with a pneumatic pump arranged in the cabinet body through line cooperation with the control button. And the single-chip microcomputer is electrically connected with an air cylinder arranged on the cabinet body through cooperation of a circuit and a control button. According to the invention, a pneumatic pump is matched with the box body structure to pressurize an adhesive to be tested, and an air pressure is used for applying a force, so that the whole adhesive can be fully and uniformly stressed, and the stability and reliability of the whole test are further ensured.

The invention discloses a novel lining device of a cast-in-place large-diameter pipe pile and a pipe pile construction method. The novel lining device comprises a lining pipe formed by splicing two lining steel molds, a guide pipe extending in the same direction is slidably connected to the outer side wall of the lining pipe, the guide pipe is pulled up along with the liquid level height of concrete in the pouring process, and a cross support is arranged in the lining pipe. The two lining steel molds are detachably and fixedly connected through the cross support, the bottom end of the lining pipe is fixedly connected with a pile bottom sealing formwork, the pile bottom sealing formwork is disconnected with the lining pipe and is taken out when recycled, before pouring, the outer wall of the lining pipe is coated with a release agent and a reinforcement cage sleeves the outer wall of the lining pipe, and the lower end of the guide pipe extends to the bottom end of the lining pipe. The strength of the pipe pile is guaranteed, meanwhile, material recycling is achieved to the maximum extent, and the manufacturing cost is effectively saved.

The invention discloses composite ultra-strong corrosion preventing and seepage stopping wall materials and an application method thereof. PVC serves as the main material of the wall materials, several additives are added and are extruded and formed through a die after being stirred and subjected to the high temperature, connecting devices are reserved on the two sides of the wall materials, a concave groove is formed in one side, and a convex groove is formed in the other side. During using, the convex groove of the rear wall material is arranged in the concave groove of the constructed front wall material through a special device in a sleeved manner, and the front wall material and the rear wall material are connected with each other in a hooked manner, and a corrosion preventing and water stopping curtain system is formed. According to the needs, the wall materials can be machined to be in the shapes such as a flat plate, a double curvature arch and a multi-curvature arch, wherein the flat-plate-shaped wall material has the functions of corrosion preventing and seepage stopping, and the wall materials of the double curvature arch type and the multi-curvature arch type have the functions of corrosion preventing and seepage stopping and also have the function of supporting. Due to the fact that extruding devices are different in power, the width of the machined wall materials can range from 500 mm to 1,200 mm, and the thickness of the machined wall materials can range from 5 mm to 12 mm. The length of the wall materials can be flexibly determined according to the using requirements and the transporting conditions. The wall materials overcome the defects in the prior art, and the purposes of corrosion preventing, seepage stopping and supporting are achieved.

An automatic umbrella opening mechanism comprises an umbrella handle and an opening and closing device, the opening and closing device comprises a flexible steel bar, a telescopic connecting piece and a steel bar driving device, the steel bar driving device is arranged at the lower end of the umbrella handle, the flexible steel bar and the telescopic connecting piece are arranged in the umbrella handle and connected with the umbrella handle, the telescopic connecting piece comprises connecting single bodies, each connecting single body is provided with a fixing hole, the connecting single bodies are connected through elastic ropes, the steel bar driving device comprises a motor and a transmission wheel, the motor is connected with the transmission wheel, the transmission wheel is provided with spiral driving teeth, and the flexible steel bar is provided with inclined strip-shaped holes matched with the spiral driving teeth. Compared with the prior art, the umbrella opening mechanism has large transmission force and is firm and compact in structure, and the umbrella handle can be opened and closed more stably. Also disclosed is an automatic opening and closing umbrella, which further comprises umbrella ribs and an umbrella cover, the umbrella ribs are connected with an upper nest and a lower nest, and the umbrella cover is connected to the umbrella ribs. Compared with the prior art, the telescopic umbrella can be stably opened and closed, the structural strength is high, and opening and closing operation is more convenient.