초록 ▼

A motorized treadmill exercising device comprising a generally planar frame equipped with a planar slider bed and head and tail rollers journalled respectively at the head and tail ends of the frame, over which an endless plastic belt is trained. The treadmill at its head end is equipped with a cros

A motorized treadmill exercising device comprising a generally planar frame equipped with a planar slider bed and head and tail rollers journalled respectively at the head and tail ends of the frame, over which an endless plastic belt is trained. The treadmill at its head end is equipped with a cross member that pivotally mounts a motor assembly including an electric drive motor and shaft driven by same that is keyed to a variable speed pulley aligned with an ordinary fixed speed pulley keyed to the treadmill belt head roller, and between which a drive pulley belt of the V type is tensioned by the biasing action of the variable speed pulley that subjects the motor assembly to uniform spring biasing action about the pivotal mounting of the motor assembly for tensioning the pulley belt into drive transmitting relation with the respective pulleys, and with the treadmill apparatus including hand hold railing on either side of same between which the treadmill user exercises, with one of the hand rails having mounted on same and connected with the treadmill drive motor assembly for pivoting same, a control mechanism that is adapted for hand actuation by the treadmill user when using the treadmill, for changing of the tensioning of the pulley belt, and the adjustment of the variable speed pulley, for convenient infinitely variable speed changing of this treadmill belt between its maximum and minimum speeds provided by the treadmill apparatus involved and protection of the drive equipment against damage.

대표청구항 ▼

In an exercise treadmill including a generally planar slider bed having a head end, a tail end, and a top surfacing extending substantially between said ends thereof, an endless treadmill belt trained over said slider bed defining an upper belt run overlying said slider bed top surfacing and a lower

In an exercise treadmill including a generally planar slider bed having a head end, a tail end, and a top surfacing extending substantially between said ends thereof, an endless treadmill belt trained over said slider bed defining an upper belt run overlying said slider bed top surfacing and a lower run passing under said slider bed, and means for driving said belt for movement of said belt upper run from said head end to said tail end of said slider bed, including a head roller journalled in said slider bed adjacent the head end of same over which the belt is trained, said head roller being journalled for rotation about an axis extending transversely of said treadmill belt, an electric drive motor assembly mounted on the slider bed ahead of said head roller for pivotal movement about an axis paralleling that of said head roller, said drive motor assembly including a drive motor driving a drive shaft about an axis paralleling said motor assembly pivot axis and having keyed to same a first drive pulley, with said head roller having keyed to same a second drive pulley, a pulley belt in drive transmitting relation between said pulleys, said head pulley axis and said drive shaft axis being in substantially coplanar relation in a plane paralleling said slider bed, said motor assembly pivot axis being disposed below said plane and between said motor assembly and the cross member, an adjustable speed control arrangement for setting the speed of said movement of said treadmill belt, said speed control arrangement comprising: said first drive pulley being a variable speed pulley, said motor assembly having a depending lever arm extending through and below said motor assembly pivot axis, a manually actuated speed control mechanism mounted on the treadmill above the treadmill belt and intermediate said slider bed ends, said mechanism including a reciprocable member and hand crank means for moving said reciprocable member in opposite directions a predetermined distance, a cable connected between said lever arm, below said motor assembly pivot axis, and said mechanism reciprocable member, a flexible cable guide through which said cable extends having one end anchored to said bed adjacent said lever and the other end anchored to said mechanism, said first drive pulley including spring biasing means for biasing same to the high speed position whereby said pulley belt is tensioned to swing said drive motor assembly about its said pivot axis to maximize the spacing of said lever arm from said head roller axis and said treadmill belt is driven at maximum high speed, said connection of said cable to said mechanism reciprocable member including means for effecting a pulling action on said cable when said reciprocable member is moved by said hand crank means in one of said opposite directions for speed reduction of said treadmill belt, and means for effecting a lost motion action on said cable when said reciprocable member is moved by said hand crank means in the other of said directions when said motor is deenergized, and for permitting said biasing action of said first drive pulley spring biasing means to bias said cable through said pulley belt and said lever to return said lever arm toward said maximum spacing from said head roller axis for speed increasing of said treadmill belt when said motor is running.