118results about How to "Large bending angle" patented technology

An artificial knee joint, which makes a drag (a contact stress) acting on a sliding surface upon bending small so as to evade an extraordinary abrasion and damage of a sliding surface of a tibia component and which prevents an bending angle from being decreased by preventing lifting of a femoral component in a rotational movement. The artificial knee joint comprises a femoral component to be secured to a distal portion of a femur and a tibia component to be secured to a proximal portion of a tibia, comprising an inner sliding surface and an outer sliding surface receiving a load of the femoral component at the tibia component.In the inner sliding surface, both of a front side and a rear side are formed in a sectional shape of circular arc in the front-to-back direction thereof, while in the outer sliding surface, a front side is formed in a sectional shape of a circular arc and a rear side is formed in a linear sectional shape in the front-to-back direction thereof.

The present invention discloses a housing assembly, a display device and a mobile terminal. The housing assembly comprises a first housing, a second housing and a connection piece, the first housing is provided with a first receiving portion, the second housing is provided with a second receiving portion, the connection piece is partially held at the first receiving portion or / and the second receiving portion, and the first housing and the second housing are mutually closed up through the connection piece. The first housing the second housing provide the extension space for the connection piece to allow the first housing and the second housing to mutually close up without the restriction of the connection piece so as to enhance the bending angle and improve the user experience.

The invention relates to a slope self-drainage anchor rod and a construction method. The self-drainage anchor rod comprises a hollow anchor pipe, an anchorage device, a cushion plate and a siphon, wherein one end of the hollow anchor pipe is open, the other end of the hollow anchor pipe is closed, the hollow anchor pipe is wrapped in a filter screen, threads are arranged at the open end of the hollow anchor pipe, water-pervious holes are formed in the rear middle of the hollow anchor pipe, the rear segment of the hollow anchor pipe and a slurry outlet pipe are perpendicularly connected, the end of the slurry outlet pipe is sleeved with a sleeve valve and a geotextile bag, and on the two sides of the slurry outlet pipe, the geotextile bag is clamped and fixed to the hollow anchor pipe through hoops; the lower side of the hollow anchor pipe is obliquely placed in a slope, the relative height difference between the pipe opening of the hollow anchor pipe and the pipe bottom of the hollow anchor pipe is kept smaller than 7 m, pulp solidifies in the geotextile bag and is anchored in stable soil, and the front segment of the hollow anchor pipe is anchored to the cushion plate through the anchorage device; a water suction pipe of the siphon is inserted in the hollow anchor pipe and stretches to the bottom, the water suction pipe is connected with a drainage pipe and a balance water outlet device through connector bent pipes on the slope, and a water inlet of the water suction pipe is as high as a water outlet of the balance water outlet device. The slope self-drainage anchor rod is simple in structure, can achieve anchoring and draining at the same time and is good in drainage effect, easy and convenient to construct and low in manufacturing cost.

The present invention provides an internal knee joint prosthesis which comprises a femoral prosthesis (1) which is connected with the far end of the femoral, a tibial gasket (4) which is fixed at a tibial support (5), the tibial support which is connected with the close end of a tibia, a tibial intercondylar eminence (3) filled into the intercondylar hole (4c) of the tibial gasket (4) and the protrudent platform (5f) hole of the tibial support (5) and a bolt (2) which ensures the opposite position of the tibial intercondylar eminence (3) with the tibial gasket (4) and the tibial support (5). The inner condylar (4a) and outer condylar (4b) joint faces of the tibial gasket (4) are respectively opposite to the inner condylar (1a) and outer condylar (1b) joint faces of the femoral prosthesis (1), so as to ensure that the femoral prosthesis (1) can realize the actions of extending, bending and backwards rolling at the tibial gasket (4). The tibial intercondylar eminence (3) is extended into the condylar interval area (1d) of the femoral prosthesis, so as to ensure the knee extension stability of the knee joint. The part of the tibial intercondylar eminence (3) near the outer condyle (1b) of the femoral prosthesis (1) is excised to ensure that the femoral prosthesis (1) has larger outwards rotation angle at the bending knee position, so as to realize the deep bend of the knee joint.

The invention discloses a pneumatic two-way bending soft body driver based on paper folding structures. The pneumatic two-way bending soft body driver comprises a limiting layer structure and two deformation layer structures of the same structure. The two deformation layer structures are symmetrically arranged on the two sides of the limiting layer structure. The first deformation layer structureand the limiting layer structure form a first driving unit. The first driving unit implements upward bending. The second deformation layer structure and the limiting layer structure form a second driving unit. The second driving unit implements upward bending. The two driving units can achieve two-way bending. Each deformation layer structure is composed of a plurality of linearly arranged paper folding structures of the same structure. The paper folding structures can implement axial stretching and contracting under two different states through folding, unfolding and superelasticity of the material, so that the deformation layer structures implement axial stretching and contracting under two different states. The stiffness of the deformation layer structures changes through axial stretching and contracting of the deformation layer structures under the two different states, and then the driver can implement variable stiffness driving through stiffness change of the deformation layer structures under the different states.

The invention discloses an endoscope surgical instrument outer sheath with variable rigidity and belongs to the technical field of minimally invasive surgical instruments. The endoscope surgical instrument outer sheath is composed of a plurality of variable-rigidity flexible units. Each variable-rigidity flexible unit comprises an instrument passage, three high-flexibility air bags, rigid connectors, a rigid wire and two discs; the rigid wire penetrates the rigid connectors and is connected with the same rigidly, the three high-flexibility air bags are connected by the method of looping the minimum-diameter positions of the air bags by round holes of the rigid connectors, and two ends of each of the three high-flexibility air bags are connected with the first disc and the second disc respectively. Spatial bending and rigidity adjusting can be realized by controlling internal pressure of the air bags. The endoscope surgical instrument outer sheath can be fit with the physiological curves of cavities of the human body, does not compress the inner-wall tissues, provides mechanical support to the surgical instruments by means of rigidity adjustment after reaching at focuses, and assists doctors to do operation more effectively on the premise of guaranteeing safety of minimally invasive surgery.

A spinning coiler is provided and capable of shortening silk hanging time and allowing silk to be easily hung again. The spinning coiler winds a plurality of silk threads spun from a spinning machine around a plurality of bobbins mounted on a bobbin support. A silk guide roller mounted to the spinning coiler can move between a production position when the plurality of silk threads are wound around the bobbins and a silk hanging position which is closer to one end of the bobbin support than the production position. A plurality of transverse-movement fulcrum guide elements can move among a production position when the plurality of silk threads conveyed from the silk guide roller are guided to the plurality of bobbins, a silk hanging position which is closer to the bobbin support than the production position, and a silk hanging position where transverse-movement fulcrum guide elements are centralized in a manner that gaps are reduced than that of the production position.

The invention discloses an endoscopic surgery instrument outer sheath based on a soft continuum mechanism, and belongs to the technical field of minimally invasive surgery instruments. The endoscopic surgery instrument outer sheath comprises a plurality of flexible units, each soft unit comprises a soft air with the high ratio of expansion and contraction, a rigid connecting piece, a steel wire soft shaft, a nickel-titanium wire, a disc, a surgical instrument channel, a pretightening force support, a pretightening force air cylinder and a fastening screw. Air pressure in the air bags is controlled to change the lengths of the air bags, and space bending of the units is achieved. Under any bent state, the pretightening force air cylinders apply pretightening force to the three nickel-titanium wires, the bending rigidity of the units is controlled, the effect of changing the rigidity is achieved, and the function of passive protection is achieved. The endoscopic surgery instrument outer sheath is used as an outer sheath unit of an endoscopic surgery instrument entering a human body, the outer sheath can be bent along with the cavity of the human body, the tissue of an inner wall is prevented from being oppressed, the rigidity is changed after the endoscopic surgery instrument outer sheath reaches the position of a disease, mechanical support is provided for the surgical instrument, the tissue can be prevented from being over-pressed to be hurt through the passive protection characteristic of the outer sheath when the surgical operation is carried out, and therefore the safety and effectiveness of surgery are improved.

A multilayer substrate includes an insulating base member having a plurality of resin films, an electric element embedded in the insulating base member, and a spacer. The resin films are made of a thermoplastic resin and stacked and attached to each other. At least one resin film has a through hole for inserting the electric element. The one resin film further has a plurality of protruding members. One protruding member opposes to another one protruding member so that the one and the another one contact and sandwich the electric element. The spacer is arranged between the one resin film and an adjacent resin film and is disposed at a base portion of one of the protruding members.

The invention provides a robot for otorhinocranial base minimally invasive operations and an operation method thereof, comprising a linear movement mechanism, a rotation mechanism, a deflection control mechanism, a clamp control mechanism and a continuous body mechanism, wherein, the linear motion mechanism and the rotating mechanism drive the deflection control mechanism, the clamping mechanism and the continuous body mechanism to move and rotate integrally so as to make the continuous body mechanism reach the preset position; the continuous body mechanism comprises a continuous body support,a plurality of continuous body joints, a nickel-titanium tube embedded in the continuous body joints, a clamp fixture and a clamp; the deflection control mechanism and the clamping mechanism controlsthe continuous body mechanism to perform the deflection action back and forth through the wire, and clamping or loosening of the clamp; and the robot is used for minimally invasive operations of theotorhinocranial base. The robot is used for otorhinocranial base minimally invasive operation, has the advantages of smaller size, larger bending angle and simple operation, can meet the needs of clinical operation, has high operation accuracy and good repeatability, can shorten the doctor's training cycle and reduce the operation risk.

The invention relates to an artificial muscle of a flexible abnormal elastic corrugated pipe, which belongs to the application technology field of a robot, a machine and a machine tool. The invention is characterized in that a eudipleural double conical abnormal elastic corrugated pipe is adopted, which is provided with various hoops in circular shape and ellipse, with a small ratio between major diameter and minor diameter of the ellipse and a large ratio between major diameter and minor diameter of the ellipse. The hoops are arranged at wave trough rounds with different diameters of the elastic corrugated pipe; wherein, the elliptic hoops are rigid and keeps undeformed, section shapes of the hoops are round, ellipse, V-shape, half-hoop shape and U-shape. Compared with a columniform elastic corrugated pipe, the invention has the advantages of improving the bearing capability, more particularly the bearing capability in the middle part, and increasing the bent angle of an arthrosis; the abnormal elastic corrugated pipe has lesser volume of the inner cavity of the elastic corrugated pipe, and the increasing of the whole bent angle of the abnormal elastic corrugated pipe requires less increasing amount of the volume of the fluid in the inner cavity, thus being convenient for controlling the fluid.

The invention belongs to the technical field of operation robots, and discloses a minimally-invasive operation robot device. The minimally-invasive operation robot device comprises bent arms and a driving mechanism, the bent arms comprise the first bent arm and the second bent arm, the first bent arm is provided with a first elastic unit, and a first connecting part of a stationary clamp is arranged at the top of the first elastic unit and connected with a first push-pull rod; the second bent arm is provided with a second elastic unit, a second connecting part is arranged between the first elastic unit and the second elastic unit and connected with a second push-pull rod, and the first push-pull rod penetrates into the second connecting part and is connected with the first connecting part.According to the minimally-invasive operation robot device, the driving mechanism is connected with the first push-pull rod and the second push-pull rod separately to be used for driving the first push-pull rod and the second push-pull rod to perform pushing and pulling to control the first elastic unit and the second elastic unit to be bent, and therefore the large bending angle of the bending arms is realized.

A projector includes a light source module, an optical engine, a light valve and a projecting lens. The light source module includes light sources, optical fibers and a light integration rod. Each of the light sources provides an illumination sub-beam. Each of the illumination sub-beams transmits to the light integration rod through the corresponding optical fiber, and passes through the light integration rod and emits out to form a first illumination beam. The optical engine includes a phosphor wheel located at a transmission path of the first illumination beam and converting the first illumination beam into a second illumination beam. The light valve is located at a transmission path of the second illumination beam and converts the second illumination beam into an image beam. The projecting lens is located at a transmission path of the image beam and projects the image beam out of the projector.

The invention discloses a multifunctional soft gripper for sorting objects. The soft gripper comprises a gripper assembly, a plurality of single finger connecting heads fixedly mounted below the gripper assembly, soft single fingers fixedly mounted below the single finger connecting heads and soft strain sensors fixed to the inner sides of the soft single fingers. The soft single fingers driven byan air pressure have bending deformation, and the soft strain sensors are used for measuring the bending deformation amounts of the soft single fingers gripping objects of different sizes. The bending deformation amounts of the soft single fingers gripping objects of different sizes can be measured precisely by means of the soft strain sensors adhered to the soft single fingers, so that the sizesof different objects are recognized, and a task of classifying and sorting different objects is finished.

The invention belongs to the technical field of efficient, high-precision and high-performance laser bend forming of metal sheets and relates to a linear light spot laser bend forming method of a metal sheet. A multi-mode laser scanning rotating mirror or a single piezoelectric deformable mirror is used for converting Gaussian distribution type point light spots of a laser into evenly distributedlinear light spots, and meanwhile the laser is loaded on a bend line area to conduct bend formation on the metal sheet; and in this way, a temperature field on the bend line of the metal sheet is evenly distributed, and the purposes of reducing warping deformation, improving bend angle consistency and improving bend efficiency are achieved.

A micromirror including a first layer having a first main extension plane, and a second layer having a second main extension plane, the first main extension plane and the second main extension plane being situated parallel to one another, the first layer and the second layer being sectionally connected to one another via at least one connection area, at least one spring element being implemented in the first layer, a movably suspended mirror plate being implemented in the second layer, the mirror plate having a mirror surface on a first side parallel to the main extension plane and being connected on an opposing second side via the connection area to an anchor of the spring element, a part of the spring element on the second side of the mirror plate being movably situated in relation to the mirror plate. A two-mirror system having such a micromirror is also provided.

A braided self-expandable endoluminal stent comprises a tubular grid formed by connection of a plurality of wave bends in the circumferential direction. Each of the wave bands comprises a plurality of crests and troughs of an elastic wire in the axial direction, and is respectively connected with another wave band. On two sides of each of the wave bands, there is a wave band abutted thereto side by side. There is at least one cross-linking point between every two wave bands abutted side by side. Each of the cross-linking points is formed by intersecting one trough on one of the wave bands abutted side by side with one corresponding crest on the other wave band, and at least one part of the cross-linking points are fixed cross-linking points. Each of the wave bands is further staggered and overlapped with at least another wave band, and a plurality of crossing points (12, 14, 22, 23) are formed between the wave bands which are staggered and overlapped with each other. Each of the wave bands, together with at least another wave band, forms a group of parallel wave bands. As the wave bands in this group are similar in wave shape and in parallel to each other, no cross-linking points or crossing points (12, 14, 22, 23) will be formed between the parallel wave bands.

A multilayer substrate includes an insulating base member having a plurality of resin films, an electric element embedded in the insulating base member, and a spacer. The resin films are made of a thermoplastic resin and stacked and attached to each other. At least one resin film has a through hole for inserting the electric element. The one resin film further has a plurality of protruding members. One protruding member opposes to another one protruding member so that the one and the another one contact and sandwich the electric element. The spacer is arranged between the one resin film and an adjacent resin film and is disposed at a base portion of one of the protruding members.

The invention provides an intervention catheter being convenient to control bending, being characterized in that at the end of the catheter, the end part and the tube body are flexibly connected in abending way; an end through hole is formed in the end part; the tube body is provided with a tube body first through hole, and the end part through hole is communicated with the tube body first through hole; the end part is fixedly connected with one end of the cable at a position close to the edge, and the cable passes through a second through hole of the tube body arranged along the axis in thetube body; or the position of the end head close to the edge is connected with the temperature control actuating element, and the temperature control actuating element is connected with the pipe body,and the temperature control actuating element is also electrically connected with a conductor, and the conductor passes through the second through hole of the pipe body arranged along the axis in thepipe body. By adopting the above scheme, a large bending angle can be realized at the end position, thereby facilitating the active guiding of the intervention catheter through the blood vessel or other pipelines with large bending. Compared with the prior art, the scheme of the invention simplifies the structure in the prior art, and has lower production and processing difficulty under the premise of realizing the same technical effect.

The invention relates to an experimental device for biomechanical property testing of a patellar joint. The experimental device comprises a framework assembly and a joint assembly, wherein the framework assembly adopts a framework structure, and the joint assembly is mounted on the framework assembly; an ankle part at the bottom of the joint assembly is connected with a framework bottom plate through a bolt, a guide rail sliding block in the joint assembly is fixedly connected with a linear guide rail sliding block in the framework assembly through a bolt; an adjustment screw rod in the joint assembly and a screw rod sleeve in the framework assembly form a threaded pair, and bending of a knee joint model is realized by rotating the adjustment screw rod to adjust the position of the top of joint assembly. The experimental device can be used for simulating biomechanics of the patellar joint at different bending angles of the knee joint. The bending angle of the knee joint can be adjusted as required, and the experimental device is reliable in fixation and can guarantee correctness of an experiment.

The vehicle is structured so that a steering shaft 12 is installed rotatably on a body frame, a tie rod and a knuckle arm are installed in the lower part of the steering shaft 12 through a steering arm 66, and wheels are mounted on the knuckle arm rotatably, wherein the steering shaft 12 is divided into a plurality of shaft sections (an upper shaft 71, a middle shaft 73, and a lower shaft 75), which are coupled together by hook type joints (a first hook joint 72 and a second hook joint 74).

Method, brace (55), and system for measuring a degree of torsion or bending of a part of a human or animal body. The method comprises the steps of attaching a sensor (56) to a part of the human or animal body, obtaining calibration data of the sensor by detecting the output signal of the sensor for a well defined degree of torsion or bending of said part of the human or animal body, storing the calibration data, measuring an output signal of the sensor during torsion or bending of said part of the human or animal body, and a final step of relating said output signal of the sensor to a degree of torsion or bending by using the calibration data. The method, brace and system are characterised in that the sensor comprises an electrically conductive loop (51), the area of said loop at least partially covering said part of the human or animal body, for instance a knee, and that the sensor further comprises an output unit (57) for providing an output signal that is a measure for the inductance of the loop.

The invention discloses a rubber air spring and application thereof. The rubber air spring comprises a rubber air spring main body, the rubber air spring main body comprises at least one lantern-shaped structure body, the rubber air spring main body comprises an outer rubber layer, a first cord fabric layer and a second cord fabric layer from outside to inside. The rubber air spring is reasonable in design and compact in structure, can serve as an air travel adjuster for use, has the advantages that the original height is small, the bending angle is large, maintenance and lubricating are not needed, no internal operating rod or piston is needed, installation is simple, the allowable working pressure is high, and the cost is low. In addition, the rubber air spring can also serve as an air damping isolator, and has the advantages that the isolation damping capability is good, control over the height is accurate, the vibration isolation efficiency is stable, the damping specialty can be loaded independently, resonance can be prevented effectively, the horizontal stability is good, and noises can be lowered effectively. The rubber air spring has good using effects and high marketing promotion value.

The invention discloses a snake bone of an endoscope. The snake bone comprises a front-section ring of the snake bone, a plurality of snake-bone joints and a rear-section ring of the snake bone which are sequentially in rivet joint with one another; the edges of the two sides of each snake-bone joint is in concave arc shapes to make an included angle formed between the edges of the two adjacent snake-bone joints; an included angle of 80-90 degrees is formed between the central connecting line of two arc line stopping plates and the central connecting line of two connecting lugs in each snake-bone joint; an included angle is formed between the edges of every two adjacent snake-bone joints, so that the bending degree between the two adjacent snake-bone joints can be increased, and the bending angle of the whole snake bone is increased; meanwhile, optical fibers for lighting, optical fibers for image transmitting and clamping tubes are conveniently and reasonably distributed, the extrusion between the optical fibers for image transmission and the clamping tubes is reduced, and the service life of the optical fibers for image transmission and the cavity clamping tubes is prolonged.

A backrest reclining apparatus for tiltably connecting the backrest of a chair or a seat for a vehicle to the seat thereof. To reduce a load on the hip portion or the waist and back portions of a seated person when the backrest is tilted, the rotating center (C) of the backrest (2) is set over the bearing surface (S1) of the seat and forward of the backrest surface (S2) of the backrest and on the side closer to the bearing surface (S1) and the backrest surface (S2) than the trochanterion (P2) of the seated person seating on the seat (3).

The invention discloses a push-pull deformable mechanical arm for a high-voltage grounding rod, which comprises a longitudinal tube and a swing tube, and is characterized in that the upper end of the longitudinal tube is hinged with the lower end of the swing tube in a matched manner through a horizontal inner hinge shaft, a lower tube externally sleeves the longitudinal tube in an up-and-down sliding manner, the external part of the swing tube is fixedly provided with an upper tube in a sleeved manner, a swing inner side of the lower end of the upper tube is hinged with a supporting arm through a horizontal upper hinge shaft, corresponding sides of the lower end of the supporting arm and the upper end of the lower tube are hinged in a matched manner through a horizontal lower hinge shaft, a swing outer side of the lower end of the upper tube is fixedly provided with an upper extension plate which extends downward along the axial direction of the swing tube, a swing outer side of the upper end of the lower tube is fixedly provided with a lower extension plate which extends upward along the axial direction of the longitudinal tube, the supporting arm also swings to a position at which the supporting arm is parallel to the longitudinal tube when the swing tube swings to a position at which the swing tube is coaxial with the longitudinal tube, the lower end of the upper extension plate is butted with the upper end of the lower extension plate in a matched manner, and the supporting arm, the upper extension plate and the lower extension plate are arranged in a closed manner. The push-pull deformable mechanical arm has the advantages that the structure is reasonable, a bending or inclining operation can be carried out conveniently, the bending angle is large, bending is performed smoothly, the peripheries can be buckled into a consistent tubular shape when the swing tube swings to a straight line state, and the operation is convenient and fast.

The invention relates to the technical field of a medical instrument, particularly to ureteroscope with a flexible end and a retractable sheath, which is used for diagnosis and treatment of urinary system diseases. The ureteroscope comprises the retractable sheath (1) and an endoscope (2), wherein the retractable sheath (1) is a columnar hollow conduit provided with a retractable sheath handle (1.1) at the end above, a bushing port (1.2) matched with two limiting balls (2.3) on the endoscope (2) is arranged inside the retractable sheath handle, and the endoscope (2) is constituted by an eyepiece (2.7), a focal length adjusting knob (2.6), a light guide bundle interface (2.5), a gyration radius adjusting switch (2.8), a lens deflection direction adjusting knob (2.9) and a lens (2.4). The ureteroscope has the advantages that both the gyration radius and the bending angle of a flexible section (2.11) at the end of the endoscope can be adjusted according to needs so as to realize safe and efficient diagnosis and therapeutic surgery on the urinary system diseases related to ureter, pelvis and kidney calyces.

The invention discloses a multi-edge bending machine and relates to bending machines. The multi-edge bending machine comprises a concave knife rest, supporting legs at the two sides slightly stretch towards the outside, the outer side of the middle of the knife rest is connected with a swing arm through a shaft, a first upper die is arranged at the vertex of the inner side of the upper supporting leg of the knife rest, a first lower die is arranged at the vertex of the inner side of the lower supporting leg of the knife rest, the dies are connected with the knife rest through bolts, polygonal through holes are formed in the middles of the first upper die and first lower die, polygonal push blocks matched with the through holes are arranged therein, one head face of each push block does not surpass the left head face of the corresponding die, and the end of each push block far away from the corresponding die is connected with at least one push device. After a sheet bends a certain angle, the push devices are started to push the push blocks to move towards the sheet and push one bent edge of the sheet to continue to get close to the other bent edge to realize the larger than 90 degrees bend angle of the sheet.

The invention discloses a deformable mechanical arm for a high-voltage grounding rod, which comprises a longitudinal tube and a swing tube, and is characterized in that the upper end of the longitudinal tube is hinged with the lower end of the swing tube in a matched manner through a horizontal inner hinge shaft, a lower tube externally sleeves the longitudinal tube in an up-and-down sliding manner, the external part of the swing tube is fixedly provided with an upper tube in a sleeved manner, a swing inner side of the lower end of the upper tube is hinged with a supporting arm through a horizontal upper hinge shaft, corresponding sides of the lower end of the supporting arm and the upper end of the lower tube are hinged in a matched manner through a horizontal lower hinge shaft, a swing outer side of the lower end of the upper tube is fixedly provided with an upper extension plate which extends downward along the axial direction of the swing tube, a swing outer side of the upper end of the lower tube is fixedly provided with a lower extension plate which extends upward along the axial direction of the longitudinal tube, the supporting arm also swings to a position at which the supporting arm is parallel to the longitudinal tube when the swing tube swings to a position at which the swing tube is coaxial with the longitudinal tube, the lower end of the upper extension plate is butted with the upper end of the lower extension plate in a matched manner, and the supporting arm, the upper extension plate and the lower extension plate are arranged in a close manner. The deformable mechanical arm has the advantages that the structure is reasonable, a bending or inclining operation can be carried out conveniently, the bending angle is large, bending is performed smoothly, the peripheries can be buckled into a consistent tubular shape when the swing tube swings to a straight line state, and the operation is convenient and fast.