Spinner bike with adjustable magnetic resistance

Abstract

A spinner bike with adjustable magnetic resistance includes a generator, a disc plate, a magnetic resistance adjusting apparatus and a resistance adjusting apparatus. The elements are disposed on a frame body of a spinner bike, so that a pedaling mechanism of the spinner bike can be operated to drive a flywheel and the disc plate for generating electricity by the cutting of flux formed by a plurality of magnets surrounding an armature core. Rotating a button of the resistance adjusting apparatus enables a connecting rod operating a pulling cable, so as to further alter coverage of the flux on the disc plate for adjustment of the loading resistance.

What is claimed is: 
     
         1 . 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;   a disc plate made of magnetically conductive metal and disposed around an outer periphery of said flywheel to be rotated together with said 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 magnetically reluctant element fixed at a bottom of said positioning element by a positioning shaft and having a pair of symmetrical fixing plates, 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 a magnet engaged at an inner side thereof, and a pulling cable having an inner cable arranged inside a cable sheath thereof, said cable sheath having a front end thereof connected to said positioning element and said inner cable having a front end thereof stretching out from said cable sheath and connected to a lateral side of said magnetically reluctant element by a fixing block; thereby the 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.   
     
     
         2 . The spinner bike with adjustable magnetic resistance as claimed in  claim 1 , wherein an interface is further installed on the handler bar and has electricity supply from the electricity generator. 
     
     
         3 . The spinner bike with adjustable magnetic resistance as claimed in  claim 2 , wherein a magnetic encoder with a magnet is further disposed at a bottom of the operating rod and a printed circuit board with an encoding circuit is disposed below the magnet of the magnetic encoder, so that the printed circuit board is able to detect a rotation angle of the magnet and convert the rotation angle into a value of loading resistance displayed on the interface. 
     
     
         4 . The spinner bike with adjustable magnetic resistance as claimed in  claim 1 , wherein a spring element is engaged outside the positioning shaft of the magnetic resistance adjusting apparatus so that when the connecting rod is operated and the pulling cable is driven thereby, the magnetically reluctant element rotates in a clockwise direction around the positioning shaft, and when the connecting rod release the operational force on the pulling cable, the magnetically reluctant element therefore returns in a counter clockwise direction due to a torque force of the spring element.