Quick-release weight pin for weight stack assembly and a weight stack assembly incorporating the same

Abstract

The invention discloses a quick-release weight pin for weight stack assembly and a weight stack assembly incorporating the same, comprising: a sleeve, a pin rod, a first spring, and a locking assembly, wherein one end of the sleeve is provided with an internally communicating through-hole. The pin rod and the sleeve are coaxially disposed, wherein the pin rod disposed within the through-hole of the sleeve and configured to perform axial extendable and retractable movement. The first spring is disposed within the sleeve, wherein the first spring is mounted around the pin rod with both ends respectively abutting against the pin rod and the sleeve.

1 . A quick-release weight pin for weight stack assembly, characterized in that it comprises:
 A sleeve having a through-hole communicating with its interior disposed at one end;   A pin rod coaxially disposed with said sleeve, said pin rod extending through said through-hole and being axially extendable and retractable;   A first spring positioned within said sleeve, said first spring being sleeved over said pin rod with both ends respectively abutting against said pin rod and sleeve;   A locking assembly comprising a locking lever, one end of said locking lever being pivotally connected to said sleeve and the other end forming a hand-held end, said locking lever having a locking portion on its sleeve-facing side configured to extend into said sleeve and abut against said pin rod;   Wherein when said locking portion abuts against said pin rod, said first spring remains in a compressed state and said locking assembly maintains static relative to said sleeve.   
     
     
         2 . The quick-release weight pin for weight stack assembly according to  CLAIM 1 , characterized in that: wherein when said locking portion abuts against said pin rod, said locking lever is parallel to said pin rod, said locking portion is perpendicular to said pin rod; and said pin rod and hand-held end are respectively insertable into adjacent weight stack assembly. 
     
     
         3 . The quick-release weight pin for weight stack assembly according to  CLAIM 1 , characterized in that: said locking portion has an arc-shaped chamfer at its distal end away from said locking lever. 
     
     
         4 . The quick-release weight pin for weight stack assembly according to  CLAIM 1 , characterized in that further comprising a second spring: said second spring positioned within said sleeve, having a first end abutting against an interior of said sleeve, a second end oriented toward said pin rod; wherein when said first spring is in a natural state, said second spring is abutting against said pin rod. 
     
     
         5 . The quick-release weight pin for weight stack assembly according to  CLAIM 4 , characterized in that: an inner wall of said sleeve at an end distal from said through-hole is formed with a retention seat for said second spring set thereover. 
     
     
         6 . The quick-release weight pin for weight stack assembly according to  CLAIM 1 , characterized in that: said sleeve has a lateral wall formed with an access hole communicating with its interior; said locking portion being configured to enter said sleeve through said access hole. 
     
     
         7 . The quick-release weight pin for weight stack assembly according to  CLAIM 6 , characterized in that: a first pivot seat is disposed at one end of said access hole, a second pivot seat corresponding to said first pivot seat is disposed at an end of said locking lever distal from said hand-held end; said first and second pivot seats being pivotally connected by a shaft. 
     
     
         8 . The quick-release weight pin for weight stack assembly according to  CLAIM 1 , characterized in that: said pin rod comprises a rod body and an end cap coaxially disposed with, wherein said end cap has a radial dimension greater than that of said rod body, and wherein said end cap is formed with a first end surface on one side thereof configured to abut against said first spring, and a second end surface on an opposing side thereof configured to be abutted against the locking portion. Therefore, by providing the end cap structure, the locking portion can exert a more stable abutting and pushing effect on the pin rod through the end cap, while ensuring stable abutment between the first spring and the pin rod. 
     
     
         9 . A weight stack assembly capable of quick-release weight comprising a plurality of weight plates ( 61 ) and a movable shuttle shaft ( 62 ) penetrating through each said weight plate ( 61 ), characterized in that: the weight stack assembly comprises a quick-release weight pin for weight stack assembly as said in  CLAIM 1 , wherein said shuttle shaft ( 62 ) is provided with a fixation hole configured for said pin rod ( 2 ) of said quick-release weight pin to pass through, and each said weight plate ( 61 ) is provided with a connection hole ( 611 ) configured for the quick-release weight pin to engage with. 
     
     
         10 . The weight stack assembly capable of quick-release weight according to  CLAIM 9 , characterized in that: wherein when said first spring ( 3 ) is in a compressed state, said pin rod ( 2 ) and said hand-held end ( 411 ) are configured to extend into connection holes ( 611 ) of two adjacent weight plates ( 61 ), respectively.