Patent Publication Number: US-2020298434-A1

Title: Cutting device

Description:
FIELD 
     The subject matter herein generally relates to cutting devices, and more particularly to a cutting device for cutting a workpiece. 
     BACKGROUND 
     A printed circuit board (PCB) is generally divided into a plurality of sub-boards after printing by a cutting device. Cutting devices in the related art includes a base for supporting and positioning the PCB, and a cover plate for pressing the PCB. However, after the PCB is cut, the cover plate may adhere to pieces of the PCB which adversely affects the process. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       Implementations of the present disclosure will now be described, by way of embodiments, with reference to the attached figures. 
         FIG. 1  is an assembled, isometric view of an embodiment of a cutting device. 
         FIG. 2  is an exploded, isometric view of the cutting device in  FIG. 1 . 
         FIG. 3  is an isometric view of a cover plate of the cutting device showing a close-up view of an elastic member of the cover plate. 
     
    
    
     DETAILED DESCRIPTION 
     It will be appreciated that for simplicity and clarity of illustration, where appropriate, reference numerals have been repeated among the different figures to indicate corresponding or analogous elements. Additionally, numerous specific details are set forth in order to provide a thorough understanding of the embodiments described herein. However, it will be understood by those of ordinary skill in the art that the embodiments described herein can be practiced without these specific details. In other instances, methods, procedures and components have not been described in detail so as not to obscure the related relevant feature being described. The drawings are not necessarily to scale and the proportions of certain parts may be exaggerated to better illustrate details and features. The description is not to be considered as limiting the scope of the embodiments described herein. 
     Several definitions that apply throughout this disclosure will now be presented. 
     The term “coupled” is defined as connected, whether directly or indirectly through intervening components, and is not necessarily limited to physical connections. The connection can be such that the objects are permanently connected or releasably connected. The term “substantially” is defined to be essentially conforming to the particular dimension, shape, or other word that “substantially” modifies, such that the component need not be exact. For example, “substantially cylindrical” means that the object resembles a cylinder, but can have one or more deviations from a true cylinder. The term “comprising” means “including, but not necessarily limited to”; it specifically indicates open-ended inclusion or membership in a so-described combination, group, series and the like. 
       FIG. 1  shows an embodiment of a cutting device  100  for dividing a workpiece (not shown). The cutting device  100  includes a base  10  and a cover plate  20 . The cover plate  20  is configured to press a workpiece placed on the base  10 . 
     Referring to  FIG. 2 , the cover plate  20  includes a base plate  21  and a pressing member  22 . The pressing member  22  is mounted on the base plate  21 , and the pressing member  22  and the base plate  21  cooperatively press the workpiece placed on the base  10 . A plurality of first cutter slots  221  are defined in the pressing member  22  to allow cutters to pass through to cut the workpiece. 
     The base  10  is substantially rectangular in cross-section and includes two oppositely disposed long sides  11 , two oppositely disposed short sides  12 , a plurality of second cutter slots  13 , a plurality of positioning pins  14 , a plurality of first positioning members  15 , a plurality of second positioning members  16 , and a plurality of guiding seats  17 . The two long sides  11  and the two short sides  12  are arranged in a rectangular shape. Each second cutter slot  13  is substantially rectangular. A long side of each second cutter slot  13  is parallel to the long sides  11 , and a short side of each second cutter slot  13  is parallel to the short sides  12 . The second cutter slots  13  are spaced apart in a direction parallel to the short sides  12 . The positioning pins  14  are disposed between every two adjacent second cutter slots  13  and between the long sides  11  and the adjacent second cutter slot  13 . Each first positioning member  15  is substantially cylindrical, and the first positioning members  15  are disposed on opposite sides of the base  10  between the long sides  11  and the long side of the second cutter slots  13 . Each second positioning member  16  is substantially cylindrical, and the second positioning members  16  are disposed on opposite sides of the base  10  between the short sides  12  and the short side of the second cutter slots  13 . Each guide seat  17  is substantially L-shaped and disposed at a corresponding corner of the base  10 . 
     In one embodiment, a quantity of the first positioning members  15  is three, such that two first positioning members  15  are disposed on one side of the base  10 , and one first positioning member  15  is disposed on the other side of the base  10 . A quantity of the second positioning members  16  is four, such that two second positioning members  16  are disposed on each of opposite sides of the base  10 . A quantity of the guide seats  17  is four, such that the four guide seats  17  are respectively disposed at four corners of the base  10 . 
     Referring to  FIGS. 2-3 , the cover plate  20  further includes a foam member  23  and an elastic member  24 . The base plate  21  is substantially a rectangular plate. A side of the base plate  21  defines a receiving groove  211  for receiving the pressing member  22 . The base plate  21  defines a plurality of first positioning holes  212 , and the plurality of positioning members  15  are respectively received in the first positioning holes  212 . The base plate  21  further defines a plurality of guiding holes  213 , and the plurality of guiding seats  17  are respectively received in the guiding holes  213 . The pressing member  22  is substantially a rectangular plate having a notch defined in each corner. A plurality of third cutter slots  214  are defined in the base plate  21 , and the first cutter slots  221 , the second cutter slots  13 , and the third cutter slots  214  are configured to align with each other to allow the cutters to pass through to cut the workpiece. A plurality of second positioning holes  222  are defined in the base plate  21  and the pressing member  22 , and the second positioning members  16  are respectively received through a pair of second positioning holes  222  defined in the base plate  21  and the pressing member  22 . The foam member  23  has an outline shape matching a shape of the pressing member  22  and is disposed on a side of the pressing member  22  facing the base  10  to prevent the pressing member  22  from directly contacting the workpiece to prevent the pressing member  22  from damaging the workpiece. 
     The elastic member  24  includes a connecting portion  241 , a main body  242 , an elastic portion  243 , and a stopping portion  244 . The connecting portion  241  is substantially plate-shaped and is coupled to a side of the pressing member  22  opposite to the base plate  21  and adjacent to the notch of the corner of the pressing member  22 . The main body  242  is substantially cylindrical. One end of the main body  242  is fixedly coupled to a side of the base plate  21 , and a second end of the main body  242  extends through the connecting portion  241 . The elastic portion  243  is sleeved over the main body  242 . One end of the elastic portion  243  abuts against the base plate  21 , and a second end of the elastic portion  243  abuts against the stopping portion  244 . The stopping portion  244  is substantially plate-shaped and is fixedly coupled to a side of the connecting portion  241  facing away from the base plate  21 . In one embodiment, the elastic portion  243  is a spring. 
     Compared with the related art, when the pressing member  22  presses the workpiece with the base plate  21 , the pressing member  22  is received in the receiving groove  211 , and the elastic members  24  are in a compressed state. In the compressed state, two ends of the elastic member  24  respectively abut the base plate  21  and the stopping portion  244 . Because the pressing member  22  defines the plurality of first cutter slots  221 , a contact area between the pressing member  22  and pieces of the workpiece after being divided is minimized, so that the pieces of the workpiece may not stick to the pressing member  22  and be lifted off the base plate  21  when the cover plate  20  is removed easily. When the cover plate  20  is removed, the elastic members  24  are decompressed by the base plate  21  being moved away from the base  10 , and then the pressing member  22  is moved away from the base  10  after the elastic members  24  are fully decompressed to delay separation of the pressing member  22  from the workpiece. 
     It can be understood that in other embodiments, the first positioning members  15  can be omitted. 
     It can be understood that in other embodiments, the main body  242  and the stopping portion  244  of the elastic members  24  can be omitted. 
     It can be understood that in other embodiments, the elastic portion  243  can be a columnar structure having compression and elasticity characteristics. 
     The embodiments shown and described above are only examples. Even though numerous characteristics and advantages of the present technology have been set forth in the foregoing description, together with details of the structure and function of the present disclosure, the disclosure is illustrative only, and changes may be made in the detail, including in matters of shape, size and arrangement of the parts within the principles of the present disclosure up to, and including, the full extent established by the broad general meaning of the terms used in the claims.