Weight training machine having a selector device that is operated easily and conveniently

Abstract

A weight training machine includes a support frame, and a selector. The support frame includes two parallel guide rods, a plurality of weights, and a drive shaft. The selector device includes a selector that is inserted into a gap between any two adjacent weights and connected to the drive shaft, and a reel mounted on the selector and having a retractable pull wire having a distal end secured to the support frame. Thus, the pull wire of the reel is kept at a straight state constantly during movement of the selector, so that the pull wire will not interfere with operation of the selector and will not tangle with the weights, thereby facilitating the user operating the selector, and thereby protecting the user's safety.

1 . A weight training machine, comprising a support frame, and a selector device mounted on the support frame, wherein: 
 the support frame includes two parallel guide rods, a plurality of weights movably mounted on the two guide rods, and a drive shaft movable between the two guide rods and extended through each of the weights to move the weights upward and downward;    the selector device includes a selector that is inserted into a gap between any two adjacent weights and connected to the drive shaft to move determined weights, and a reel mounted on the selector and having a retractable pull wire having a distal end secured to the support frame so that the pull wire of the reel is kept at a straight state constantly when the selector is inserted into the gap between any two adjacent weights and connected to the drive shaft.    
   
   
       2 . The weight training machine in accordance with  claim 1 , wherein the support frame further includes a support plate movably mounted on the two guide rods, and a positioning plate mounted on the support plate, and the distal end of the pull wire of the reel is provided with a stop head locked on the positioning plate of the support frame.  
   
   
       3 . The weight training machine in accordance with  claim 2 , wherein the support plate is rested on an uppermost one of the weights.  
   
   
       4 . The weight training machine in accordance with  claim 2 , wherein the stop head of the pull wire has a spherical shape.  
   
   
       5 . The weight training machine in accordance with  claim 2 , wherein the positioning plate has a mediate portion formed with an elongated stop slit, and the stop head of the pull wire is locked in the stop slit of the positioning plate.  
   
   
       6 . The weight training machine in accordance with  claim 5 , wherein the distal end of the pull wire is extended through the stop slit of the positioning plate.  
   
   
       7 . The weight training machine in accordance with  claim 2 , wherein the positioning plate of the support frame is substantially U-shaped.  
   
   
       8 . The weight training machine in accordance with  claim 2 , wherein the positioning plate of the support frame has two distal ends each secured to the support plate by a locking screw.  
   
   
       9 . The weight training machine in accordance with  claim 2 , wherein the support frame further includes an operation plate movably mounted on the two guide rods and located above the support plate, and two mounting tubes each movably mounted on a respective one of the two guide rods and each located between the operation plate and the support plate.  
   
   
       10 . The weight training machine in accordance with  claim 1 , wherein the selector is substantially Z-shaped.  
   
   
       11 . The weight training machine in accordance with  claim 1 , wherein the selector has a first portion formed with an operation plate that is inserted into the gap between any two adjacent weights and connected to the drive shaft, a mediate portion formed with an upright section and a second portion formed with a flat plate.  
   
   
       12 . The weight training machine in accordance with  claim 11 , wherein the drive shaft of the support frame has an outer wall formed with a plurality of annular retaining grooves, and the operation plate of the selector has a forked distal end formed with two opposite retaining plugs inserted into and retained in either one of the retaining grooves of the drive shaft to secure the operation plate to the drive shaft, and a clamping opening located between the two retaining plugs to clamp the drive shaft.  
   
   
       13 . The weight training machine in accordance with  claim 11 , wherein the flat plate of the selector has a distal end provided with a handle parallel with the upright section to facilitate a user operating the selector.  
   
   
       14 . The weight training machine in accordance with  claim 11 , wherein the reel is mounted on the upright section of the selector.  
   
   
       15 . The weight training machine in accordance with  claim 11 , wherein the upright section of the selector is formed with two threaded locking holes, the reel has a periphery provided with two ears each formed with a fixing hole, and the selector device further includes two locking bolts each extended through the fixing hole of the reel and each screwed into the respective locking hole of the selector to secure the reel to the selector.  
   
   
       16 . The weight training machine in accordance with  claim 11 , wherein the flat plate of the selector is formed with a through hole, and the pull wire of the reel is extended through and protruded outward from the through hole of the selector.  
   
   
       17 . The weight training machine in accordance with  claim 1 , wherein the pull wire is retractably mounted on the reel and is extended through and protruded outward from an outlet hole of the reel.  
   
   
       18 . The weight training machine in accordance with  claim 1 , wherein the pull wire of the reel is kept at a straight state constantly when the selector is detached from the weights and the drive shaft.  
   
   
       19 . The weight training machine in accordance with  claim 1 , wherein the pull wire of the reel is kept at a straight state constantly during movement of the selector, so that the pull wire of the reel does not interfere with operation of the selector and does not tangle with the weights.  
   
   
       20 . The weight training machine in accordance with  claim 2 , wherein the selector is limited to the positioning plate of the support frame by the pull wire of the reel.