Electric treadmill

Abstract

The present invention relates to an electric treadmill in which the tread base neighboring upon the running belt and based upon the central reference point is provided with sensing lines for acceleration, sensing lines for deceleration both of which are arranged one after the other. When the runner touches the fixed sensing position by light wave or acoustic wave, a CPU located within the electric console gives a command according to the sensing position to accelerate or decelerate the motor such that an immediate control of the rotational speed of the running belt is achieved. In addition, a sensing line for stop can be disposed behind the decelerating sensing line. When the operator continues to be shifted forwards, thereby contacting with the sensing line for stop, CPU gives a command to stop the motor immediately. Thus, the safety of the operator can be more ensured.

What is claimed is:  
     
         1 . An electric treadmill comprising a tread base, a handrail, an electric console, a motor, a running belt and a rear support, said motor bringing a drive belt into rotation which drives a front roller, said running belt being placed around said front and rear rollers, thereby creating an endless rotation by means of the operation of said motor;  
       wherein, based upon the central reference point, said tread base neighboring upon said running belt is provided with sensing lines for acceleration, sensing lines for deceleration both of which are arranged one after the other, and wherein, when the runner touches the fixed sensing position by light wave or acoustic wave, a CPU located within said electric console gives a command according to the sensing position to accelerate or decelerate said motor so that an immediate control of the rotational speed of said running belt is achieved.  
     
     
         2 . The electric treadmill of claims  1 , wherein it's preferable that the central reference point is located at the center of said running belt.  
     
     
         3 . The electric treadmill of claims  1 , wherein said sensing elements of said sensing lines each send out a straight signal crossing through said tread base.  
     
     
         4 . The electric treadmill of claims  1 , wherein said sensing lines for acceleration are divided into a multiple accelerating sensing line  20  and a basic accelerating sensing line  30 .  
     
     
         5 . The electric treadmill of claims  1 , wherein said sensing lines for deceleration are divided into a multiple decelerating sensing line and a basic decelerating sensing line.  
     
     
         6 . An electric treadmill comprising a tread base, a handrail, an electric console, a motor, a running belt and a rear support, said motor bringing a drive belt into rotation which drives a front roller, said running belt being placed around said front and rear rollers, thereby creating an endless rotation by means of the operation of said motor;  
       wherein, based upon the central reference point, said tread base neighboring upon said running belt is provided with sensing lines for acceleration, sensing lines for deceleration and a sensing line for stop three of which are arranged one after another, and wherein, when the runner touches the fixed sensing position by light wave or acoustic wave, a CPU located within said electric console gives a command according to the sensing position to accelerate, decelerate or stop said motor so that an immediate control of the rotational speed of said running belt is achieved.  
     
     
         7 . The electric treadmill of claims  6 , wherein it's preferable that the central reference point is located at the center of said running belt.  
     
     
         8 . The electric treadmill of claims  6 , wherein said sensing elements of said sensing lines each send out a straight signal crossing through said tread base.  
     
     
         9 . The electric treadmill of claims  6 , wherein sensing lines for acceleration are divided into a multiple accelerating sensing line and a basic accelerating sensing line.  
     
     
         10 . The electric treadmill of claims  6 , wherein sensing lines for deceleration are divided into a multiple decelerating sensing line and a basic decelerating sensing line.  
     
     
         11 . An electric treadmill comprising a tread base, a handrail, an electric console, a motor, a running belt and a rear support, said motor bringing a drive belt into rotation which drives a front roller, said running belt being placed around said front and rear rollers, thereby creating an endless rotation by means of the operation of said motor;  
       wherein said tread base neighboring upon said running belt is provided with a sensing line for stop, and wherein, when the runner touches the fixed sensing position by light wave or acoustic wave, a CPU located within said electric console gives a command to stop the operation of said motor.  
     
     
         12 . The electric treadmill of claims  11 , wherein said sensing elements of said sensing line each send out a straight signal crossing through said tread base.