Spinner bike with adjustable magnetic resistance

A spinner bike with adjustable magnetic resistance, comprising:

• a frame body including a pedaling mechanism and a handler bar;
• an electricity generator disposed at a rear side of said frame body, including a fixing element, a circular armature core surrounding said fixing element, a rotating element having an axis engaging a fourth pulley wheel and an axial seat engaging in a sleeve bush of a flywheel and a plurality of magnets disposed in an inner depression of said flywheel and surrounding said armature core, a gap arranged between said plurality of magnets and said armature core, so that when the flywheel is driven to rotate by the rotating element, the magnets and the armature core would produce electricity due to operation of cutting-of-flux;
• wherein an outer periphery of the flywheel has an inner external diameter and an outer external diameter to form an annular positioning surface, and the annular positioning surface has multiple first positioning holes;
• a disc plate made of magnetically conductive metal and disposed around the outer periphery of said flywheel to be rotated together with said flywheel;
• wherein an inner diameter of the disc plate is larger or equal to the inner external diameter of the flywheel but smaller than the outer external diameter of the flywheel, the disc plate has multiple second positioning holes corresponding to the first positioning holes, and the disc plate is set on the outer periphery of the flywheel by several bolts;
• also, an external diameter of the disc plate is larger than the outer external diameter of the flywheel, and the external diameter of the disc plate is at least 1.5 times larger than the outer external diameter of the flywheel;
• a magnetic resistance adjusting apparatus disposed on said frame body at a front side of said disc plate, including a positioning element with a space arranged therein, a spindle hole arranged at a bottom thereof and a trench hole at a top thereof, a magnetically reluctant element fixed at a bottom of said positioning element by a positioning shaft and having a pair of symmetrical fixing plates positioned by a pivot element at the bottom, said pair of fixing plates arranged in a gap with a distance slightly greater than a thickness of said disc plate, each fixing plate having at least two magnets engaged at an inner side thereof;
• wherein an internal surface of the fixing plates having two circular convex surfaces, two magnets are arranged on both convex surfaces for making the magnets to be symmetric, and the arrangement linear angle of the magnets are correspond to a tangent angle of the disc plate in order to achieve coupling effectively;
• when the magnetically reluctant element is rotated to the lowest position, the pair of fixing plates would be positioned at lateral sides of the disc plate;
• when the magnetically reluctant element is rotated to the highest position, the pair of fixing plates would be separate from the disc plate;
• wherein a U shape fixing frame arrange at an inner periphery of fixing plates, and the middle of the U shape fixing frame has a slot with upward opening;
• wherein a pulling cable including a cable and a core wire inside the cable, a front end of the cable is positioned on the positioning element, a front end of the core wire set through the trench hole and connect to a rear side of the magnetically reluctant element, and a fixing block is set in the slot for pulling the magnetically reluctant element to drive the pivot element to rotate on the positioning shaft;
• moreover, at an outer periphery of the positioning shaft of the magnetic resistance adjusting apparatus has a spring element;
• thereby an magnetic flux of said magnets inside the pair of fixing plates would cover both side of the disc plate laterally when the pulling cable is not operated and a loading resistance at a maximum value is produced, and the magnetic flux of said magnets of the fixing plates would depart from the disc plate gradually and the loading resistance decreases gradually until returning to zero when the pulling cable is operated;
• and
• a resistance adjusting apparatus including a case body disposed at a front end of said frame body, a rotatable button, an operating rod connected to said button and an operating piece having a center thereof pivotally engaged to said case body by a pivot shaft and an end thereof pivotally engaged to the operating rod, a rear end of said inner cable of the pulling cable further fixedly tied up to a connecting rod, thereby the button is rotated to control the operating piece operated based on the pivot shaft and further have the connected rod operating the pulling cable for operation;
• whereby the pedaling mechanism is operated to rotate the rotating element for the flywheel and the disc plate to be driven for rotation and for the electricity generator to produce electricity, and the button is rotated for the connecting rod of the resistance adjusting apparatus to operate the pulling cable for the purpose of altering coverage area of magnetic flux produced by the operation and therefore adjusting a loading resistance of the spinner bike.