Clamping device

Abstract

A clamping device includes a seat body, two clamping elements, at least one spring, a gear, a turning wheel, an impeding element, and a release button. The seat body has a front casing and a rear casing. Each clamping element has a clamping body with a rack. The spring is disposed between the seat body and one of the two clamping elements. The gear and the turning wheel are pivoted in the seat body together. The gear is engaged with the two racks, and the turning wheel has a contact surface formed therearound. The impeding element is pivoted in the seat body, wherein the impeding element has an impeding surface that contacts the contact surface. The release button is movably disposed on the seat body and connected with the impeding element. Hence the clamping device's whole structure is simple, and the cost of the clamping device is reduced.

1 . A clamping device, comprising: 
 a seat body having a front casing and a rear casing;    two clamping elements, wherein each clamping element has a clamping body and a lateral clamping element connected with the clamping body, each clamping body has a rack, and the two clamping bodies of the two clamping elements are disposed between the front casing and the rear casing;    at least one spring disposed between the seat body and one of the two clamping elements;    a gear and a turning wheel pivoted in the seat body together, wherein the gear is engaged with the two racks of the two clamping bodies, and the turning wheel has a contact surface formed therearound;    an impeding element pivoted in the seat body, wherein the impeding element has an impeding surface contacting the contact surface of the turning wheel; and    a release button movably disposed on the seat body and connected with the impeding element.    
   
   
       2 . The clamping device as claimed in  claim 1 , wherein the rear casing has a plurality of through holes and rectangular holes, each two of the rectangular holes communicated with two sides of each through hole, and the rectangular hole has a smaller width than that of the through hole; wherein the seat body further comprises a support board that has a plurality of protrusions projected from one surface thereof, each of the protrusions has two retaining portions projected from two sides thereof, the protrusions of the support board are inserted into the corresponding through holes of the rear casing, and the protrusions are moved toward the corresponding rectangular holes for retaining the retaining portions on an inner face of the rear casing; wherein an opposite surface of the support board is jointed with a sucker device via a connecting rod of the sucker device.  
   
   
       3 . The clamping device as claimed in  claim 1 , wherein each clamping element has a flexible spacer attached on an inner face of each lateral clamping element.  
   
   
       4 . The clamping device as claimed in  claim 1 , wherein each clamping body has a rectangular hole, and the two racks are respectively disposed on a top side of one of the rectangular hole and a bottom side of the other rectangular hole.  
   
   
       5 . The clamping device as claimed in  claim 1 , wherein one of the clamping bodies has a receiving space formed thereover, and the other clamping body is received in the receiving space for stacking the two clamping bodies.  
   
   
       6 . The clamping device as claimed in  claim 1 , wherein the spring is a compression spring.  
   
   
       7 . The clamping device as claimed in  claim 1 , wherein the spring contacts against the seat body and a projected piece of one of the clamping elements.  
   
   
       8 . The clamping device as claimed in  claim 1 , wherein the gear and the turning wheel are pivoted in the seat body together by a pivoting element passing through the gear and the turning wheel.  
   
   
       9 . The clamping device as claimed in  claim 1 , wherein the impeding element has a pivoting portion formed on one side thereof, and a pivot for pivoting the pivoting portion of the impeding element in the seat body.  
   
   
       10 . The clamping device as claimed in  claim 1 , wherein the impeding surface of the impeding element is a cambered surface.  
   
   
       11 . The clamping device as claimed in  claim 1 , wherein the impeding surface has a first side and a second side, one distance between the first side and an axle center of the impeding element is longer than an other distance between the second side and the axle center of the impeding element, and the impeding surface further comprises a plurality of one-way teeth formed between the first side and the second side.  
   
   
       12 . The clamping device as claimed in  claim 1 , wherein the impeding element has an impeding post projected from one face thereof, the release button has an impeding arm and the impeding arm has an impeding hole, and the impeding post of the impeding element is inserted into the impeding hole of the impeding arm.  
   
   
       13 . The clamping device as claimed in  claim 1 , wherein the release button is movably disposed in a sliding groove of the front casing.  
   
   
       14 . The clamping device as claimed in  claim 1 , wherein the release button has a button portion projected outside the seat body.