53results about How to "Strong magnetic attraction" patented technology

The present invention is a bar type dental attachment for implants that makes use of magnetic attractive force to secure a denture in place. This bar type dental attachment can rotate corresponding to the movement of the denture during occlusion. The present invention has excellent wear resistance and makes insertion and removal of the denture easy. The present invention has a bar type keeper with an arced attractive face with a constant radius of curvature, and a magnetic assembly that comprises a magnet, a pair of yoke plates sandwiching the magnet, and a seal material made of anticorrosive non-magnetic material that covers the magnet and is hermetically sealed. The attractive surface of the magnetic assembly is curved to fit the keeper.

The invention relates to a magnetic non-positive connection between a bicycle pedal and the shoe of a cyclist, generated by planar permanent magnet elements (1,1'), with a displaceable guided mounting in the open regions (3,3') of the pedals, which undergo an even, easily detachable, magnetic non-positive interaction with soft magnetic non-positive connection elements (11), inserted in the tread region of the conventional bicycle shoe (12) and hence an unlimited relative movement, in particular, in rotation, between the bicycle shoe and the pedal, without causing undesired separation of the magnetic non-positive connection.

The invention discloses a magnetic badminton racket comprising: a handle, a shaft, a head frame including an outer surface and an inner surface and a plurality of gut strings crisscrossed within the inner surface. The head frame is provided with a magnet mounting section centered on its top, and several sockets are provided into the outer surface, spaced from each other and vertical to the outer surface. Several small neodymium magnets are fixed within the sockets, with their top surfaces exposed and flush with the outer surface. Each magnet is in the shape of a cylinder, cuboid, truncated cone or truncated quadrangular pyramid, which possesses strong magnetic attraction, is not subject to detaching and would not affect the aesthetic appearance of the racket. The invention also discloses a shuttlecock suitable for use together with the racket, to enable to pick up shuttlecock conveniently by mean of magnetic attraction therebetween.

A magnetic flux converter, comprising a housing, a coil bobbin installed inside the housing, a coil wound in the middle of the coil bobbin, a permanent magnet, an iron core and a spring connected to the iron core, the top of the housing is provided with an opening, and one end of the iron core It is attracted to the permanent magnet, and the ejector rod at the other end of the iron core extends to the opening at the top of the housing; it also includes a magnetically conductive coil, which is located between the coil and the permanent magnet. In the magnetic flux converter of the present invention, a magnetic conducting coil is added between the coil and the permanent magnet, so that the magnetic force lines of the permanent magnet and the coil are redistributed, and the magnetic force lines of the permanent magnet and the coil pass through the magnetic conducting coil to form a new magnetic circuit; the electromagnetic field will change the permanent The magnetic path of the magnetic field makes it possible to make the resultant force of the electromagnetic force and the elastic force greater than the attraction force of the permanent magnet to the iron core, and the iron core can move and push out no matter when the permanent magnet is installed upright or reversely (or when a positive and negative power supply is applied to the coil). The ejector rod performs the tripping action.

The invention discloses a magnetic transmission type array eddy-current probe aiming at pipeline defect detection and a method. The magnetic transmission type array eddy-current probe comprises an excitation probe device and a detection probe device, wherein the excitation probe device is formed by a permanent magnet framework which can be arranged on the outer wall of a pipeline in a sliding and sleeving way and an excitation coil which is wound on the permanent magnet framework; the detection probe device is formed by a ferromagnetic material framework which can be arranged in the pipeline in the sliding and sleeving way, multiple PVC (Polyvinyl Chloride) frameworks which are in a circular array, circumferential detection coils which are wound on the PVC frameworks and a laser head; multiple circumferential detection coils in the circular array can be used for detecting defects existing in the wall of the pipeline and can be simultaneously used for locating axial and circumferential positions of the defects existing in the wall of the pipeline; the frameworks of the excitation probe device and the detection probe device have magnetic adsorption capacity, so that the situation of ensuring the synchronicity of movement of the excitation coil and the multiple circumferential detection coils along an axial direction of the pipeline can be realized through a non-contact mode. Compared with a conventional non-penetration type eddy-current probe, the magnetic transmission type array eddy-current probe disclosed by the invention has similar detection sensitivity on the defects on the inner wall and the outer wall of the pipeline, and meanwhile, for the defects in larger depth, the problems of signal saturation and impossibility in quantification do not exist.

The invention discloses a soldering handle fixing steel ring, which comprises a steel ring main body, a solder handle is embedded in the middle of the steel ring main body, a cutout is opened on one side of the steel ring main body, and a positioning device is embedded in the inside of the cutout. The middle part of one side of the positioning block is fixedly installed with a boss, the two sides of the positioning block close to the main body of the steel ring are provided with installation grooves, and the insides of the two installation grooves are slidingly connected with installation platforms. The installation table is welded with the main body of the steel ring. The present invention solves the problem that the existing solder handle fixed steel ring is generally fixed, and the installation method is single. When damage occurs, it is easy to cause the problem of unchanged maintenance. The adjustable performance of the steel ring is poor, and it is generally installed by direct socketing. When vibration occurs during processing, the steel ring is easily rotated, so that the tightness of the installation is reduced.