Patent Publication Number: US-2019193248-A1

Title: F-clamp

Description:
FIELD OF THE INVENTION 
     The present invention relates to a F-clamp which avoids interfering the first clamping arm and the second clamping arm of the F-clamp in a limited space. 
     BACKGROUND OF THE INVENTION 
     A reinforcement structure of a F-clamp contains a support portion and a locking mechanism. The support includes a first clamping arm, a second clamping arm, and a connection rod inserting through the first clamping arm and the second clamping arm, and each of the first clamping arm and the second clamping arm has a column and a covering layer, wherein the column is made of metal, and the covering layer is made of plastic material. The locking mechanism includes a screw element screwing with the second clamping arm, such that the locking mechanism is rotated to drive the first clamping arm and the second clamping arm to clamp a workpiece. 
     The second clamping arm slides along the connection rod relative to the first clamping arm. However, the locking mechanism is screwed on a bottom of the second clamping arm, so it is easy to interfere the second clamping arm as operating the F-clamp in a limited space. 
     The present invention has arisen to mitigate and/or obviate the afore-described disadvantages. 
     SUMMARY OF THE INVENTION 
     The primary aspect of the present invention is to provide a F-clamp which avoids interfering the first clamping arm and the second clamping arm of the F-clamp in a limited space. 
     To obtain the above mentioned aspect, a F-clamp provided by the present invention contains: 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a perspective view showing the assembly of a F-clamp according to a preferred embodiment of the present invention. 
         FIG. 2  is a perspective view showing the exploded components of the F-clamp according to the preferred embodiment of the present invention. 
         FIG. 3  is a cross sectional view showing the operation of the F-clamp according to the preferred embodiment of the present invention. 
         FIG. 4  is also another cross sectional view showing the operation of the F-clamp according to the preferred embodiment of the present invention. 
     
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     The present invention will be clearer from the following description when viewed together with the accompanying drawings, which show, for purpose of illustrations only, a preferred embodiment in accordance with the present invention. 
     With reference to  FIGS. 1-4 , a F-clamp in accordance with a preferred embodiment of the present invention comprises: a first clamping arm  1 , a second clamping arm  2 , a connection rod  3 , and a locking mechanism  4 . 
     The first clamping arm  1  includes an opening  11  formed on a bottom thereof so as to accommodate and rotatably connect with an upper end of the connection rod  3 , wherein a diameter of the opening  11  is more than the connection rod  3  so that the first clamping arm  1  rotates relative to the connection rod  3 . A first side of the second clamping arm  2  is fitted with the connection rod  3 , and a distance between the first clamping arm  1  and the second clamping arm  2  changes when the second clamping arm  2  slides along the connection rod  3 . The locking mechanism  4  includes a screw element  41  screwing with a first side of the first clamping arm  1  and abutting against the connection rod  3 , wherein a contacting position of the screw element  41  and the connection rod  3  is lower than a rotatable connection position of the first clamping arm  1  and the connection rod  3 , and the locking mechanism  4  includes a rotary lever  42  exposing outside the first side of the first clamping arm  1  adjacent to the opening  11 . 
     Thereby, when the second clamping arm  2  slides close to the first clamping arm  1  along the connection rod  3 , a workpiece is clamped by the first clamping arm  1  and the second clamping arm  2 , and the rotary lever  42  is rotated clockwise so as to revolve the first clamping arm  1 , hence the first clamping arm  1  swings downwardly to the second clamping arm  2  along the connection rod  3  so as to clamp the workpiece with the second clamping arm  2  tightly (as shown in  FIG. 4 ), and a top of a second side of the second clamping arm  2  is pressed by the workpiece and the first clamping arm  1  so as to force the connection rod  3  firmly. Thereafter, the rotary lever  42  is rotated counterclockwise so that the first clamping arm  1  swings upwardly away from the second clamping arm  2 , and the second clamping arm  2  slides on the connection rod  3 , thus unclamping the workpiece. 
     The first clamping arm  1  further includes a fixing block  12  rotatably connected on a bottom of a second side thereof, hence when the first clamping arm  1  is driven by the locking mechanism  4 , the fixing bock  12  of the first clamping arm  1  clamps the workpiece flatly with the second clamping arm  2 . 
     The second clamping arm  2  further includes a clasp plate  21  mounted on the top of the second side thereof facing the fixing bock  12 , and the clasp plate  21  has anti-slip bosses  22  formed on a top thereof so as to clamp the workpiece with the fixing bock  12  securely. 
     Accordingly, the locking mechanism  4  is screwed with the first side of the first clamping arm  1  so as to avoid interfering the first clamping arm  1  and the second clamping arm  2  in a limited space. 
     While various embodiments in accordance with the present invention have been shown and described, it is clear to those skilled in the art that further embodiments may be made without departing from the scope of the present invention.