Patent Publication Number: US-9849714-B2

Title: Plastic plate clip

Description:
FIELD OF THE INVENTION 
     The present invention relates to the technical field of office supplies, in particular to a plastic plate clip. 
     BACKGROUND OF THE INVENTION 
     As tools for storing, protecting and regularly managing paper files, file holders are essential office supplies used in enterprises, government agencies, schools and the like for sorting, binding and storing paper files. File holders may be used for containing various kinds of paper files. 
     Plate clips are one kind of file holders. As shown in  FIG. 8  and  FIG. 9 , an existing plate clip includes a bottom plate  1 , a hook  2  and a torsional spring  3 . An end of the front side of the bottom plate  1  extends forward and curls to form a roll  12  having an axial hole. The hook  2  includes rotating shafts  21  provided on two sides of the front end, connecting portions  22  provided on two sides at the middle part, and a fixed portion  23  provided on the rear end, the two ends of each of the connecting portions  22  being connected to one end of the respective rotating shaft  21  and one end of the fixed portion  23 , respectively, the other end of the rotating shaft  21  being inserted into the axial hole. The torsional spring  3  is sleeved onto to the rotating shaft  21 , and one end of the torsional spring is riveted to the rotating shaft  21  while the other end of the torsional spring  3  protrudes from a slit of the roll  12  to the bottom of the bottom plate  1 . The specific assembly process includes the following steps: 
     a first step of assembly the torsional spring  3 : the torsional spring  3  is sleeved onto the rotating shaft  21  and one end of the torsional spring  3  is riveted to the rotating shaft  21 ; a second step of pre-tightening: the torsional spring  3  is pre-tightened; a third step of placing the torsional spring  3  and the rotating shaft  21  into the axial hole: the rotating shaft  21  and the torsional spring  3  are placed into the uncurled axial hole (at this moment, the axial hole is a semi-circular arc-shaped groove), and the other end of the torsional spring  3  is placed on the bottom of the bottom plate; a fourth step of binding: the end of the front side of the bottom plate is semi-circularly curled to form the roll  12  (at this moment, the torsional spring  3  is fixed within the axial hole of the roll  12 ). 
     A plate clip of such a structure is complex in structure, complicated in production procedures, and both manpower and material resources consuming; and the demands of dedicated tools by the pre-tightening and binding procedures lead to complex assembly and high cost. In addition, the existing plate clips can not be disassembled, such that the whole plate clip will be discarded if one of the parts is damaged. It is disadvantageous to recycling of resources as those parts can not be reused. 
     SUMMARY OF THE INVENTION 
     An object of the present invention is to, in view of the deficiencies of the prior art, provide a plastic plate clip which is simple in structure, convenient in assembly and disassembly and low in cost. 
     A plastic plate clip is provided, including a bottom plate, a hook and a torsional spring, the hook including rotating shafts provided on two sides of the front end, connecting portions provided on two sides of the middle part, and a fixed portion provided at the rear end, the two ends of each of the connecting portions being connected to an end of the respective rotating shaft and one end of the fixed portion, respectively, where the bottom plate is a plastic plate, and the front end of the plastic plate arches upward to form an arc-shaped groove into which the other end of the rotating shaft is inserted; the torsional spring is sleeved onto the rotating shaft, and one end of the torsional spring is riveted to the rotating shaft while the other end thereof detachably presses against the bottom plate; and the hook is hinged to the bottom plate through the rotating shaft. 
     A pressing groove against which the other end of the torsional spring presses is formed within the arc-shaped groove of the bottom plate. 
     The other end of the torsional spring presses against a side wall of the arc-shaped groove. 
     A pre-tightening groove facilitating the pre-tightening of the torsional spring is provided on the bottom plate. 
     A mounting groove for assembling the other end of the torsional spring is formed on the bottom of the bottom plate, with a baffle for stopping and preventing the torsional spring from falling off the mounting groove being provided at the upper end of the mounting groove; and when in assembly, the other end of the torsional spring is forced to be snapped into the mounting groove below the baffle. 
     A hanger for hanging the plastic plate clip is assembled on the bottom of the bottom plate. 
     A hanger groove is formed on the bottom of the bottom plate, a hanger hole is formed at the upper part of the hanger and a stopper for limiting the hanger in the hanger groove is provided at the upper part of the hanger, and the hanger is movably assembled within the hanger groove. 
     A bugle and a neck engaged to each other are provided on the hanger groove and the stopper, respectively; when in use of the hanger, the hanger is pulled such that the neck of the stopper disengages from the bugle and the hanger hole at the upper part of the hanger protrudes from the bottom plate; and when not in use of the hanger, the hanger is pushed such that the neck of the stopper and the bulge of the hanger groove engage to each other and the hanger is fixed within the hanger groove. 
     Fastening holes for fastening the plastic plate clip are formed on the bottom plate. 
     There are two fastening holes. 
     The present invention has the following beneficial effects: during assembly of the plastic plate clip, the spring is pressed into the arc-shaped groove to automatically implement pre-tightening of the spring, such that the assembly of the plastic plate clip omits the steps of pre-tightening and binding, saves both manpower and material resources, and reduces the cost; meanwhile, as the bottom plate of the plastic plate clip is a plastic plate, the surface thereof becomes more smooth, without scratching files; and such a plastic plate clip is simple in structure, convenient in assembly and disassembly and low in cost. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a front-side structure diagram of a plastic plate clip according to the present invention; 
         FIG. 2  is a rear-side structure diagram of Embodiment 1; 
         FIG. 3  is a breakdown structure diagram of  FIG. 2 ; 
         FIG. 4  is a rear-side structure diagram of Embodiment 2; 
         FIG. 5  is a breakdown structure diagram of  FIG. 4 ; 
         FIG. 6  is a rear-side structure diagram of Embodiment 3; 
         FIG. 7  is a breakdown structure diagram of  FIG. 6 ; 
         FIG. 8  is a front-side structure diagram of a plastic plate clip according to the prior art; and 
         FIG. 9  is a rear-side structure diagram of the plastic plate clip according to the prior art; 
     
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     In order to make those skilled in the art understand the present invention better, the present invention will be further described with reference to the accompanying drawings by specific embodiments. 
     Embodiment 1 
     As shown in  FIGS. 1-3 , a plastic plate clip is provided, including a bottom plate  1 , a hook  2  and a torsional spring  3 , the hook  2  including rotating shafts  21  provided on two sides of the front end, connecting portions  22  provided on two sides of the middle part, and a fixed portion  23  provided at the rear end, the two ends of each of the connecting portions  22  being connected to an end of the respective rotating shaft  21  and one end of the fixed portion, respectively, where the bottom plate  1  is a plastic plate, and the front end of the plastic plate arches upward to form an arc-shaped groove  11  into which the other end of the rotating shaft  21  is inserted; the torsional spring  3  is sleeved onto the rotating shaft  21 , and one end of the torsional spring  3  is riveted to the rotating shaft  21  while the other end of the torsional spring  3  detachably presses against the bottom plate  1 ; and the hook  2  is hinged to the bottom plate  1  through the rotating shaft  21 . 
     Pressing the other end of the torsional spring  3  against the bottom plate  1 , on one hand, provides the hook  2   a  with a torque required for supporting files, and on the other hand, fastens and prevents the rotating shaft  21  from falling off the arc-shaped groove  2 . The bottom plate  1  of the plastic plate clip is a plastic plate and the rotating shaft  21  is disposed within the arc-shaped groove  11 . Due to the toughness of the plastic plate, one end of the torsional spring  3  detachably presses against the bottom plate  1 , such that the step of binding is omitted in comparison to the existing metal plate clips and the cost is reduced. In addition, the plastic bottom plate  1  is free of sharp corners of a metal bottom plate, and thus feels smoother than a metal plate clip. 
     A pressing groove  13 , against which the other end of the torsional spring  3  presses, is formed within the arc-shaped groove  11  of the bottom plate  1 . The pressing groove  13  effectively prevents the other end of the torsional spring  3  from falling off the arc-shaped groove  11 , thereby achieving a purpose of fastening. 
     A pre-tightening groove  15  facilitating the pre-tightening of the torsional spring  3  is provided on the bottom plate  1 . 
     The specific assembly process includes the following steps: 
     a first step of assembly the torsional spring  3 : the torsional spring  3  is sleeved onto the rotating shaft  21  and one end of the torsional spring  3  is riveted to the rotating shaft  21 ; 
     a second step: the fixed portion  23  of the hook  2  is placed on the front side of the bottom plate  1 , the rotating shaft  21  of the hook  2  is placed at the opening of the arc-shaped groove  11  on the rear side, and the other end of the torsional spring  3  is disposed in the pre-tightening groove  15  of the bottom plate  1 ; and 
     a third step: the rotating shaft  21  of the hook  2  is pressed into the arc-shaped groove  11 , and the other end of the torsional spring  3  is forced to fall into the pressing groove  13  within the arc-shaped groove  11  (at this moment, the torsional spring  3  is fixed within the arc-shaped groove  11 ). Due to the elasticity of the torsional spring  3 , the procedure of automatic pre-tightening of the torsional spring  3  is implemented during the pressing of the hook  2 . 
     When in disassembly, the other end of the torsional spring  3  is moved away from the pressing groove  13  by a tool, such that the torsional spring  3  falls off the arc-shaped groove  11  and the bottom plate  1  is disengaged from the hook  2 . Now, the disassembly process ends. 
     A hanger  4  for hanging the plastic plate clip is assembled on the bottom of the bottom plate  1 . The hanger  4  is advantageous to hang the plastic plate clip and convenient in use. 
     A hanger groove  5  is formed on the bottom of the bottom plate  1 , a hanger hole  41  is formed at the upper part of the hanger  4  and a stopper  42  for limiting the hanger  4  in the hanger groove  5  is provided at the upper part of the hanger  4 , and the hanger  4  is movably assembled within the hanger groove  5 . 
     A bugle  51  and a neck  421  engaged to each other are provided on the hanger groove  5  and the stopper  42 , respectively; when in use of the hanger  4 , the hanger  4  is pulled such that the neck  421  of the stopper  42  disengages from the bugle  51  and the hanger hole  41  at the upper part of the hanger  4  protrudes from the bottom plate  1 ; and when not in use of the hanger  4 , the hanger  4  is pushed such that the neck  421  of the stopper  42  and the bulge  51  of the hanger groove  5  engage to each other and the hanger  4  is fixed within the hanger groove  5 . 
     Fastening holes  6  for fastening the plastic plate clip are formed on the bottom plate  1 . 
     Further, there are two fastening holes  6 . Generally, the plastic plate clip may be fastened on a fixed plate for use, and this may be accomplished by the fastening holes  6 . Considering firmness and convenience of assembly or other factors, it is the most practical to design two fastening holes  6 . 
     Embodiment 2 
     As shown in  FIG. 4  and  FIG. 5 , this embodiment differs from Embodiment 1 in that a mounting groove  14  for assembling the other end of the torsional spring  3  is formed on the bottom of the bottom plate  1 , with a baffle  141  for stopping and preventing the torsional spring  3  from falling off the mounting groove  14  being provided at the upper end of the mounting groove  14 ; and when in assembly, the other end of the torsional spring  3  is forced to be snapped into the mounting groove  14  below the baffle  141 . 
     With the bottom plate  1  of this solution, it is possible to effectively prevent the torsional spring  3  from falling off, and both the assembly and disassembly are quite convenient. 
     The specific assembly process includes the following steps: 
     a first step of assembly the torsional spring  3 : the torsional spring  3  is sleeved onto the rotating shaft  21  and one end of the torsional spring  3  is riveted to the rotating shaft  21 ; 
     a second step: the fixed portion  23  of the hook  2  is placed on the front side of the bottom plate  1 , the rotating shaft  21  of the hook  2  is placed at the opening of the arc-shaped groove  11  on the rear side, and the other end of the torsional spring  3  is disposed on the mounting groove  14 ; 
     a third step: the rotating shaft  21  of the hook is pressed into the arc-shaped groove  11 ; and 
     a fourth step: the other end of the torsional spring  3  is forced to be snapped into the mounting groove  14  below the baffle  141  (at this moment, the torsional spring  3  is fixed within the arc-shaped groove  11 ). 
     When in disassembly, the other end of the torsional spring  3  is moved away from the baffle  141  by a tool and taken out from the mounting groove  14 . At this moment, the torsional spring  3  falls off the arc-shaped groove  11  and the bottom plate  1  is disengaged from the hook  2 . Now, the disassembly process ends. 
     Embodiment 3 
     As shown in  FIG. 6  and  FIG. 7 , this embodiment differs from Embodiment 1 and Embodiment 2 in that the other end of the torsional spring  3  presses against a side wall of the arc-shaped groove  11 . A pre-tightening groove  15  facilitating the pre-tightening of the torsional spring  3  is provided on the bottom plate  1 . 
     The specific assembly process includes the following steps: 
     a first step of assembly the torsional spring  3 : the torsional spring  3  is sleeved onto the rotating shaft  21  and one end of the torsional spring  3  is riveted to the rotating shaft  21 ; 
     a second step: the fixed portion  23  of the hook  2  is placed on the front side of the bottom plate  1 , the rotating shaft  21  of the hook  2  is placed at the opening of the arc-shaped groove  11  on the rear side, and the other end of the torsional spring  3  is disposed in the pre-tightening groove  15  of the bottom plate  1 ; and 
     a third step: the rotating shaft  21  of the hook  2  is pressed into the arc-shaped groove  11 , and the other end of the torsional spring  3  is forced to fall into the arc-shaped groove  11  and press against the side wall of the arc-shaped groove  11 . As the bottom plate  1  is made of plastic, the other end of the torsional spring  3  may be ensured to be clamped with the side wall due to the toughness of plastic. Due to the elasticity of the torsional spring  3 , the procedure of automatic pre-tightening of the torsional spring  3  is implemented during the pressing of the hook  2 . 
     When in disassembly, the other end of the torsional spring  3  is moved away from the arc-shaped groove  11  by a tool, such that the torsional spring  3  falls off the arc-shaped groove  11  and the bottom plate  1  is disengaged from the hook  2 . Now, the disassembly process ends. 
     The bottom plate  1  of such a structure is simple in structure and easy in production. However, there is a risk that the torsional spring  3  may fall off the arc-shaped groove  11 . Therefore, generally, a plastic plate clip of such a structure is directly fastened on a fixed plate for use. This may effectively prevent the torsional spring  3  from falling off and makes the use quite convenient. In this embodiment, a pressing block may be further provided within the arc-shaped groove  11  for fastening the other end of the torsional spring. 
     The foregoing embodiments are provided just for illustrating the technical solutions of the present invention, and not intended to limit the protect scope of the present invention. Although the present invention has been described in details with reference to preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent replacements may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.