106results about How to "Large elastic deformation" patented technology

Devices and methods provide for ablation of cardiac tissue for treating cardiac arrhythmias such as atrial fibrillation. Although the devices and methods are often be used to ablate epicardial tissue in the vicinity of at least one pulmonary vein, various embodiments may be used to ablate other cardiac tissues in other locations on a heart. Devices generally include at least one tissue contacting member for contacting epicardial tissue and securing the ablation device to the epicardial tissue, and at least one ablation member for ablating the tissue. Various embodiments include features, such as suction apertures, which enable the device to attach to the epicardial surface with sufficient strength to allow the tissue to be stabilized via the device. For example, some embodiments may be used to stabilize a beating heart to enable a beating heart ablation procedure. Many of the devices may be introduced into a patient via minimally invasive introducer devices and the like. Although devices and methods of the invention may be used to ablate epicardial tissue to treat atrial fibrillation, they may also be used in veterinary or research contexts, to treat various heart conditions other than atrial fibrillation and/or to ablate cardiac tissue other than the epicardium.

An LGA connector is used to interconnect an LGA package and a printed circuit board. The LGA connector includes an elastomeric body with a plurality of through-holes. Metal films are formed on inner walls of through-holes and splay out around the mouths of their upper and lower openings. The metal films are formed by vacuum metallization, sputtering, chemical plating, electrical plating or PVD. The through-holes have a funnel-like shape to absorb external stresses and redirect the stress to shrink the through-hole diameters. Moreover, the metal films' elastic deformation is larger than conventional metal conductive fillers so as to improve reliability.

The invention discloses a double-reed large-turning angle flexible joint, relates to the technical field of mechanical kinematic pairs, and solves the problem that the conventional flexible hinge is small in motion range. The double-reed large-turning angle flexible joint is characterized in that a first shell is integrally formed by a 210-degree arc plate and a 90-degree arc plate; the side wall of the 210-degree arc plate and the side wall of the 90-degree arc plate are integrally connected, and the thickness of the 90-degree arc plate is smaller than that of the 210-degree arc plate; the 210-degree arc plate of the first shell is arranged outside a 90-degree arc plate of a second shell, the 90-degree arc plate of the first shell is arranged inside a 210-degree arc plate of the second shell, and a gap is formed between the first shell and the second shell; a first flexible plate is inserted into the first shell and the second shell through a first through groove and a second through groove; a second flexible plate is inserted into the first shell and the second shell through the remaining parts of the first through groove and the second through groove. The double-reed large-turning angle flexible joint is applied to the field of large-stroke precision transmission mechanisms and flexible transmission.

A wrist brace for relaxing extensor musculature in a forearm having a first body, a second body, and at least one hinge joint hinging the first and second body together. The first body is arranged to be secured to a forearm while the second body extends from the hinge to a palm of the hand belonging to the forearm. A force generator, such as a leaf spring, is adapted to generate a moment of force between the first and second body, such that the second body, hinging relative to the first body, presses against the palm of the hand in a direction directed towards the upper side of the hand belonging to the palm, and wherein the moment of force is at least exerted on the hand when the hand is extended in line with the forearm.

The invention discloses a flexible three-finger clamp holder having a touch sensing function. The touch force distribution situations of the parts, in contact with a clamped object, of the fingers are obtained in real time through touch sensors attached to flexible claws and are fed back to a control system, and the control system controls a motor to drive grabbing strength of the flexible claws. The flexible three-finger clamp holder adopting the structure has the touch sensing function, can exert different clamping forces according to the specific characteristics of the object and does not damage the object. Due to the fact that the flexible claws are made from an elastic flexible material, the three fingers can product a large elastic deformation during object clamping, accordingly stronger attachment is formed, it can be ensured that the object does not fall or slip and is reliable to clamp, the flexible three-finger clamp holder is simple in structure and can serve as a terminal executor to be widely applied to various robots.

An assist device is provided with a spring device that generates an auxiliary driving force, by an elastic energy, acting on a joint of a leg. The spring device includes a gas spring having a cylinder and a piston. Bending/stretching motion between link members and at the joint is transmitted to the spring device through a motion transmission device that includes a link arm. The spring device is provided so that the auxiliary driving force increases as a knee bending angle θ increases until the knee bending angle θ reaches a predetermined angle, and so that, once the knee bending angle θ exceeds the predetermined angle, the auxiliary driving force becomes smaller than or equal to the driving force obtaining at the predetermined angle, effectively reducing a burden on an actuator of the legged mobile robot joint.

The embodiment of the invention discloses a self-calibration radio frequency blind plug connector and a radio frequency module. The self-calibration radio frequency blind plug connector comprises a locking end plug base, a connecting rod and a sliding-into end plug base. An outer conductor of the connecting rod is of a sleeve structure, the two ends of the outer conductor of the connecting rod are respectively provided with a first split groove elastic hole, an inner conductor of the connecting rod is a rigid needle, an inner conductor of the sliding-into end plug base is provided with a second split groove elastic hole, an inner conductor of the locking end plug base is provided with a third split groove elastic groove, the connecting rod is arranged between the locking end plug base and the sliding-into plug base, a plurality of first elastic pieces forming the first split groove elastic holes slide into an outer conductor of the sliding-into end plug base and an outer conductor of the locking end plug base, the two ends of the rigid needle are inserted into the second split groove elastic hole and the third split groove elastic hole respectively to enable signal communication to be conducted between the inner conductor of the locking end plug base and the inner conductor of the sliding-into end plug base through the rigid needle. The self-calibration radio frequency blind plug connector can achieve large position offset in the radial direction, and has large axial allowance capability.

A hydraulic pressure control device includes: a hydraulic pressure unit, in which a solenoid valve for hydraulic pressure control is assembled with a hydraulic pressure block; and an electronic control unit, which includes a circuit board having a drive control circuit of the solenoid valve and stored inside a resin case, wherein a solenoid coil is fit onto the main body of the solenoid valve fixed to the hydraulic pressure block of hydraulic pressure unit, and wherein the solenoid coil is elastically pressed against and fixed to the hydraulic pressure block by a coil pressing arm integrally formed with the resin case.

The invention discloses a spinning spindle capable of fixing bobbins of different internal diameters. The spinning spindle capable of fixing bobbins of different internal diameters comprises a spindle blade (10), a wharve (20), a locating shaft (30) and a spindle base (40). The spindle blade (10) is composed of tile-shaped components (11 and 12). The lower ends of the tile-shaped components (11 and 12) are hinged to the wharve (20) through spring springs (50). The hollow portion of the spindle blade (10) is conical. A center rod (60) is fixed to the top face of the wharve (20) and sleeved with a conical sliding block (70). The sliding block (70) is connected with a limit device (80). The limit device (80) can drive the sliding block (70) to slide vertically along the center rod (60) and is limited. Under action of the sliding block, the tile-shaped components rotate around the hinged position until the tile-shaped components make contact with the inner wall of each bobbin, the external diameter of the spindle blade is increased through the expanded tile-shaped components, and bobbins are restrained on the spindle blade so that bobbins of different internal diameters can be fixed.

The invention relates to a revolution precision measuring device used for an inner support type shafting and connected with a hollow shafting. The hollow shafting and a CCD autocollimator are included; the hollow shafting comprises a right bearing end cap, an angular contact bearing, a locking nut, an angle sensor, an outer framework, a platform body, a moment motor and a left bearing end cap; the right bearing end cap is connected with the revolution precision measuring device used for the inner support type shafting; and the revolution precision measuring device used for the inner support type shafting comprises a leveling support, one end of the support is provided with a flat mirror, the outside of the leveling support is provided with a groove, a socket head cap screw is arranged in the groove, the intermediate circumference of the leveling support is provided with four interlaced gaps so that the leveling support is elastic to certain extent, the socket head cap screw on the leveling support is adjusted to adjust the flat mirror so that the flat mirror is parallel with the CCD autocollimator, the other end of the leveling support is provided with an inner wedge-shaped sleeve, the inner wedge-shaped sleeve is in threaded connection with an outer wedge-shaped sleeve, and each of the outer and inner wedge-shaped sleeves is a thin-wall part in which a conical surface is included and four gap grooves are distributed uniformly in the circumference. The revolution precision measuring device is characterized by simple and compact structure, low cost and convenient operations, and especially suitable for the hollow shafting whose revolution precision is hard to measure.

The invention discloses a vibration damping device for processing a thin-wall axle part. The vibration damping device comprises a spindle, wherein a plurality of resin rings successively sleeve the spindle from left to right; rubber rings are arranged between the resin rings; a special bolt is arranged at one end of the spindle; the special bolt is connected with the resin rings and is used for successively pushing the resin rings to compress the rubber rings and fix into the inner holes of the processed part. The resin and rubber materials are applied to the vibration damping device; the vibration damping device has the characteristics of light weight, compact structure, simple operation, and the like; the elastic variation of the rubber is large, so that the rigidity of the thin-wall axle part is effectively increased; the processing vibration phenomenon is eliminated.

The invention relates to an external spline burr removing device. The defect that the universality of equipment for removing burrs on a spline is poor in the prior art is overcome. According to the external spline burr removing device, a drive box is fixed to a rack, and a front tip is fixed to the drive box and driven by the drive box and drives a workpiece to rotate; a tailstock is further fixed to the rack and a rear tip is fixed to the tailstock; the workpiece with an external spline is clamped between the front tip and the rear tip; and a drive motor is further fixed between the front tip and the rear tip on the rack and drives brush wheels to rotate, the brush wheels make contact with and are rubbed with the external spline on the workpiece, and the workpiece is driven by the front tip to rotate. Therefore, burrs on the external spline on the whole circumference can be removed through the brush wheels.

The invention discloses an anchor chain system, with a power buffer function, of a single-point-anchoring net cage. The anchor chain system comprises a plurality of elastic tubes, sleeves and n levels of anchor chains, wherein the middle of each elastic tube is provided with an anchoring ring, one end of the first-level anchor chain in the n levels of anchor chains is anchored to an anchoring foundation, and the other end of the first-level anchor chain is fixedly anchored to the anchoring ring of one elastic tube; one second-level anchor chain is mounted in the duct of the elastic tube connected with the first-level anchor chain in a penetrating manner, and two ends of the second-level anchor chain extends out of the elastic tube and are respectively connected to the anchoring rings of two other elastic tubes; one third-level anchor chain is mounted in the duct of each of the two elastic tubes connected with two ends of the second-level anchor chain in a penetrating manner, two ends of each third-level anchor chain extends out of the corresponding elastic tube and are respectively connected with the anchoring rings of two other elastic tubes, and so on; by the arrangement, the n levels of anchor chains are connected, and two ends of the n levels of anchor chains are anchored to a floating tube frame to form the anchor chain system. The anchor chain system has the advantages that 2n-1 anchoring points are connected with the floating tube frame, stress concentration at each anchoring point can be reduced, large elastic deformation can be achieved, and the power buffer function is provided.

A contactor is provided which contactor comprises an insulating substrate, a concave portion formed in the insulating substrate and extending in a perpendicular direction from a surface thereof, and elastic conductive particles disposed in the concave portion. A part of one of the conductive particles protrudes from the surface of the insulating substrate.