Muscle exercise device

Abstract

Proposed is a muscle exercise device. In the muscle exercise device, when it is detected that a withdrawal position of a cable has entered a preset safety area in a process in which a device control part controls a drive motor in an exercise mode, the drive motor may be controlled so that an exercise load of the drive motor is reduced. Through this, when it is detected that the cable is retracted into the safety area without completely entering the initial position, for example, the device body, an exercise load may be reduced, thereby obtaining the same effect as ending exercise by mounting an exercise device such as a barbell to an existing mounting part.

1 . A muscle exercise device comprising:
 a device body;   at least one drive motor installed inside the device body and configured to provide an exercise load;   a cable configured to be pulled out of the device body to transfer the exercise load of the drive motor outside of the device body;   a sensor configured to detect a withdrawal position of the cable; and   a controller configured to control the drive motor so that the exercise load of the drive motor is reduced when the sensor detects that the withdrawal position of the cable has entered a safety range.   
     
     
         2 . The muscle exercise device of  claim 1 , wherein the controller controls the drive motor so that the exercise load of the drive motor is maintained at a target load before the withdrawal position of the cable enters the safety range. 
     
     
         3 . The muscle exercise device of  claim 2 , wherein the controller controls the drive motor so that the drive motor sequentially provides a basic load that is less than the target load, increases the load from the basic load to the target load, and reduces the load from the target load to the basic load when the withdrawal position has entered the safety range. 
     
     
         4 . The muscle exercise device of  claim 2 , further comprising:
 a data storage configured to store a plurality of exercise types and a plurality of possible safety ranges for the exercise types, and   a user input part to receive an input selecting one of the plurality of exercise types,   wherein the controller controls the exercise load of the drive motor based on one of the plurality of possible safety ranges corresponding to the one of the plurality of exercise types selected through the user input part.   
     
     
         5 . The muscle exercise device of  claim 4 , wherein
 a plurality of exercise ranges for the plurality of exercise types are stored in the data storage, and   the plurality of exercise types comprise:
 a first exercise type in which a first safety range of the plurality of possible safety ranges is located under a first exercise range of the plurality of exercise ranges based on a withdrawal direction of the cable, and 
 a second exercise type in which a second safety range of the plurality of possible safety ranges is located within a second exercise range of the plurality of exercise ranges. 
   
     
     
         6 . The muscle exercise device of  claim 5 , wherein when the withdrawal position detected by the sensor has entered the first safety range while the muscle exercise device operates according to the first exercise type, the controller controls the drive motor so that the load of the drive motor is reduced. 
     
     
         7 . The muscle exercise device of  claim 6 , wherein the first safety range for the first exercise type is between an initial position of the cable and an upper limit position according to the first exercise type. 
     
     
         8 . The muscle exercise device of  claim 5 , wherein when a exercise discontinuance condition is satisfied based on the withdrawal position detected by the sensor entering the second safety range while the muscle exercise device operates according to the second exercise type, the controller controls the drive motor so that the load of the drive motor is reduced. 
     
     
         9 . The muscle exercise device of  claim 8 , wherein when the withdrawal position detected by the sensor is maintained for at least a preset period within the second safety range when the muscle exercise device operates according to the second exercise type, the controller determines that the exercise discontinuance condition is satisfied. 
     
     
         10 . The muscle exercise device of  claim 2 , wherein when an exercise preparation condition is satisfied during an initial operation of the drive motor, the controller controls the drive motor so that the load of the drive motor reaches the target load. 
     
     
         11 . The muscle exercise device of  claim 10 , wherein when the withdrawal position detected by the sensor is outside the safety range, the controller determines that the exercise preparation condition is satisfied. 
     
     
         12 . The muscle exercise device of  claim 11 , wherein the safety range is set between an initial position of the cable and an upper limit position that is set according to an exercise type to be performed by a user. 
     
     
         13 . The muscle exercise device of  claim 1 , wherein the sensor comprises an encoder installed inside the device body and configured to detect a rotation of the drive motor, the sensor detecting the withdrawal position of the cable based on the rotation of the drive motor detected by the encoder. 
     
     
         14 . The muscle exercise device of  claim 1 , wherein the cable has recognition marks marked at preset intervals, and
 the sensor detects the withdrawal position of the cable based on counting a number of the recognition marks that has passed the sensor while the cable is withdrawn.   
     
     
         15 . The muscle exercise device of  claim 1 , wherein the safety range is changeable according to a user's setting. 
     
     
         16 . An apparatus comprising:
 a body;   a motor provided inside the device body and configured to provide a load;   a cable coupled to the motor and configured to be pulled out of the body to transfer the load of the motor outside;   a sensor configured to detect a withdrawal length of the cable; and   a controller configured to control the motor,   wherein the controller controls the motor so the load of the motor is a first load when the withdrawal length of the cable is within an exercise range, and the load of the motor is a second load that is less than the first load when the withdrawal length of the cable is within a safety range.   
     
     
         17 . The apparatus of  claim 16 , wherein the safety range is between an initial position of the cable before the cable is pulled out of the device body and an upper limit position that is set according to an exercise type to be performed by a user. 
     
     
         18 . The apparatus of  claim 16 , wherein the controller controls the motor so the load of the motor is the second load further based on determining that the withdrawal length of the cable is maintained within the safety range for at least a preset period. 
     
     
         19 . An apparatus comprising:
 a motor;   a bar coupled by a cable coupled to the motor, the bar being moved by a user during an exercise;   a sensor that detects a movement of the cable; and   a controller that determines when a user is performing an exercise based on the movement of the cable,   wherein the controller controls the motor to sequentially provide a first load before the user performs the exercise, provide a second load greater than the first load while the user performs the exercise, and a third load less than the second load after the user performs the exercise.   
     
     
         20 . The apparatus of  claim 19 , wherein the controller determines that the user is not performing the exercise when the bar is moved by a less than particular distance from an initial position or when the bar does not move for at least a preset period.