Peristaltic pump device and fluid delivery system thereof

Abstract

A peristaltic pump device includes a casing, a flexible tube, and a roller module. The flexible tube is disposed within an accommodating space of the casing and has a curved tube portion. The roller module is rotatably disposed within the accommodating space and surrounded by the flexible tube and includes a holder structure movable relative to the curved tube portion, a roller mechanism rotatably mounted on the holder structure, and an actuating rod. The actuating rod is movable upward and downward relative to the curved tube portion. A protruding structure protrudes laterally from at least one of the holder structure and the actuating rod. When the actuating rod moves downward, the protruding structure interferes with another of the holder structure and the actuating rod for moving the holder structure to make the roller mechanism compress the curved tube portion by a lateral, rotational, or tilted movement of the holder structure.

What is claimed is: 
     
         1 . A peristaltic pump device comprising:
 a casing having an accommodating space;   a flexible tube disposed within the accommodating space and having a curved tube portion; and   a roller module rotatably disposed within the accommodating space and surrounded by the flexible tube, the roller module comprising:
 a holder structure movable relative to the curved tube portion; 
 a roller mechanism rotatably mounted on the holder structure; and 
 an actuating rod movable upward and downward relative to the curved tube portion, a protruding structure protruding laterally from at least one of the holder structure and the actuating rod; 
   wherein when the actuating rod moves downward, the protruding structure interferes with another of the holder structure and the actuating rod for moving the holder structure to make the roller mechanism compress the curved tube portion by a lateral, rotational, or tilted movement of the holder structure.   
     
     
         2 . The peristaltic pump device of  claim 1 , wherein the protruding structure has an inclined surface formed thereon; when the actuating rod moves downward, the another of the holder structure and the actuating rod slides along the inclined surface for making the roller mechanism compress the curved tube portion by the lateral, rotational, or tilted movement of the holder structure. 
     
     
         3 . The peristaltic pump device of  claim 1 , wherein the holder structure is tilted against the curved tube portion; when the actuating rod moves downward, and the protruding structure interferes with the another of the holder structure and the actuating rod for making the roller mechanism compress the curved tube portion by the rotational or tilted movement of the holder structure. 
     
     
         4 . The peristaltic pump device of  claim 1 , wherein the holder structure comprises a first holder and a second holder extending from the first holder, the roller mechanism comprises a first roller rotatably mounted on the first holder and a second roller rotatably mounted on the second holder; when the actuating rod moves downward, the protruding structure interferes with the another of the holder structure and the actuating rod for moving the first holder and the second holder in the same direction to be positioned symmetrically relative to the actuating rod, and the first roller and the second roller compress the curved tube portion respectively. 
     
     
         5 . The peristaltic pump device of  claim 1 , wherein the holder structure comprises a first holder and a second holder disposed symmetrically relative to the first holder, the roller mechanism comprises a first roller rotatably mounted on the first holder and a second roller rotatably mounted on the second holder; when the actuating rod moves downward, the protruding structure interferes with the another of the holder structure and the actuating rod for moving the first holder and the second holder in opposite directions to make the first roller and the second roller compress the curved tube portion respectively. 
     
     
         6 . The peristaltic pump device of  claim 5 , wherein the holder structure further comprises at least one third holder movable relative to the curved tube portion, the roller mechanism further comprises a third roller rotatably mounted on the at least one third holder; the actuating rod moves downward, the protruding structure interferes with the another of the holder structure and the actuating rod for moving the at least one third holder to make the third roller compress the curved tube portion. 
     
     
         7 . The peristaltic pump device of  claim 6 , wherein the first holder, the second holder and the at least one third holder are disposed symmetrically within the accommodating space. 
     
     
         8 . The peristaltic pump device of  claim 1 , wherein the protruding structure comprises a first protruding portion protruding from the actuating rod and a second protruding portion protruding from the holder structure, the first protruding portion has a first inclined surface formed thereon, the second protruding portion has a second inclined surface formed thereon corresponding to the first inclined surface; when the actuating rod moves downward, the first inclined surface slides along the second inclined surface for making the roller mechanism compress the curved tube portion by the lateral, rotational, or tilted movement of the holder structure. 
     
     
         9 . The peristaltic pump device of  claim 1 , wherein when the actuating rod moves upward to release interference between the protruding structure and the another of the holder structure and the actuating rod, the curved tube portion provides a resilient force to return the holder structure to its original position. 
     
     
         10 . A fluid delivery system comprising:
 a peristaltic pump device comprising:
 a casing having an accommodating space; 
 a flexible tube disposed within the accommodating space and having a curved tube portion, an inlet tube portion, and an outlet tube portion; and 
 a roller module rotatably disposed within the accommodating space and surrounded by the flexible tube, the roller module comprising:
 a holder structure movable relative to the curved tube portion; 
 a roller mechanism rotatably mounted on the holder structure; and 
 an actuating rod movable upward and downward relative to the curved tube portion, a protruding structure protruding laterally from at least one of the holder structure and the actuating rod; 
 
   a fluid source connected to the inlet tube portion for providing a fluid; and   an output component connected to the outlet tube portion for outputting the fluid;   wherein when the actuating rod moves downward, the protruding structure interferes with another of the holder structure and the actuating rod for moving the holder structure to make the roller mechanism compress the curved tube portion by a lateral, rotational, or tilted movement of the holder structure;   the fluid flows from the inlet tube portion to the outlet tube portion through the curved tube portion via compression of the roller mechanism upon the curved tube portion.   
     
     
         11 . The fluid delivery system of  claim 10 , wherein the protruding structure has an inclined surface formed thereon; when the actuating rod moves downward, the another of the holder structure and the actuating rod slides along the inclined surface slide for making the roller mechanism compress the curved tube portion by the lateral, rotational, or tilted movement of the holder structure. 
     
     
         12 . The fluid delivery system of  claim 10 , wherein the holder structure is tilted against the curved tube portion; when the actuating rod moves downward, and the protruding structure interferes with the another of the holder structure and the actuating rod for making the roller mechanism compress the curved tube portion by the rotational or tilted movement of the holder structure. 
     
     
         13 . The fluid delivery system of  claim 10 , wherein the holder structure comprises a first holder and a second holder extending from the first holder, the roller mechanism comprises a first roller rotatably mounted on the first holder and a second roller rotatably mounted on the second holder; when the actuating rod moves downward, the protruding structure interferes with the another of the holder structure and the actuating rod for moving the first holder and the second holder in the same direction to be positioned symmetrically relative to the actuating rod, and the first roller and the second roller compress the curved tube portion respectively. 
     
     
         14 . The fluid delivery system of  claim 10 , wherein the holder structure comprises a first holder and a second holder disposed symmetrically relative to the first holder, the roller mechanism comprises a first roller rotatably mounted on the first holder and a second roller rotatably mounted on the second holder; when the actuating rod moves downward, the protruding structure interferes with the another of the holder structure and the actuating rod for moving the first holder and the second holder in opposite directions to make the first roller and the second roller compress the curved tube portion respectively. 
     
     
         15 . The fluid delivery system of  claim 14 , wherein the holder structure further comprises at least one third holder movable relative to the curved tube portion, the roller mechanism further comprises a third roller rotatably mounted on the at least one third holder; when the actuating rod moves downward, the protruding structure interferes with the another of the holder structure and the actuating rod for moving the at least one third holder to make the third roller compress the curved tube portion. 
     
     
         16 . The fluid delivery system of  claim 15 , wherein the first holder, the second holder and the at least one third holder are disposed symmetrically within the accommodating space. 
     
     
         17 . The fluid delivery system of  claim 10 , wherein the protruding structure comprises a first protruding portion protruding from the actuating rod and a second protruding portion protruding from the holder structure, the first protruding portion has a first inclined surface formed thereon, the second protruding portion has a second inclined surface formed thereon corresponding to the first inclined surface; when the actuating rod moves downward, the first inclined surface slides along the second inclined surface for making the roller mechanism compress the curved tube portion by the lateral, rotational, or tilted movement of the holder structure. 
     
     
         18 . The fluid delivery system of  claim 10 , wherein when the actuating rod moves upward to release interference between the protruding structure and the another of the holder structure and the actuating rod, the curved tube portion provides a resilient force to return the holder structure to its original position.