Abstract:
A screwdriver capable of driving screws with any shape of head comprises a fixing member and a main body. The main body comprises a first end and a second end, the fixing member fixes on the first end of the main body. The screwdriver further comprises a number of hard and small-diameter cores and a button. The cores are contained in the main body and are partially exposed out of the main body, the button is configured on the second end of the main body and resists against one end of the number of cores. The button drives a part of the number of cores to form a head to match a screw.

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
       [0001]    This application claims priority to Chinese Patent Application No. 201610292814.6 filed on May 4, 2016 in the China Intellectual Property Office, the contents of which are incorporated by reference herein. 
       FIELD 
       [0002]    The subject matter herein generally relates to screwdrivers. 
       BACKGROUND 
       [0003]    Generally, different types of screwdrivers can fasten different types of screws. Thus high cost is caused to user with many different types of screwdriver being necessary. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0004]    Implementations of the present disclosure will now be described, by way of example only, with reference to the attached figures. 
           [0005]      FIG. 1  illustrates an isometric view of one exemplary embodiment of a screwdriver. 
           [0006]      FIG. 2  illustrates a cross-sectional view of one exemplary embodiment of the screwdriver of  FIG. 1 . 
           [0007]      FIG. 3  illustrates an exploded view of one exemplary embodiment of the screwdriver of  FIG. 1 . 
           [0008]      FIG. 4  illustrates an isometric view of one exemplary embodiment of a line shaped head that is formed by the screwdriver of  FIG. 1  when the screwdriver of  FIG. 1  fastens a line shaped screw. 
           [0009]      FIG. 5  illustrates an isometric view of one exemplary embodiment of a cross shaped head that is formed by the screwdriver of  FIG. 1  when the screwdriver of  FIG. 1  fastens a cross shaped screw. 
           [0010]      FIG. 6  illustrates an isometric view of one exemplary embodiment of a hexagon shaped head that is formed by the screwdriver of  FIG. 1  when the screwdriver of  FIG. 1  fastens a hexagon shaped screw. 
       
    
    
     DETAILED DESCRIPTION 
       [0011]    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. In addition, 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. 
         [0012]    A definition that applies throughout this disclosure will now be presented. 
         [0013]    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. 
         [0014]      FIG. 1  shows an isometric view of one exemplary embodiment of a screwdriver  1 . Depending on the embodiment, the screwdriver  1  can include, but is not limited to, a fixing member  10 , a main body  20 , a number of cores  30 , and a button  40 . 
         [0015]    Referring  FIG. 2  and  FIG. 3 , the fixing member  10  can be a hollowed cone body. First screw thread  11  is set on an internal surface of the fixing member  10 . In at least one exemplary embodiment, the main body  20  can be a hollowed cylinder. The main body  20  includes a first end  21  and a second end  22 . Second screw thread  210  is set on an external surface of the main body  20 . The second screw thread  210  matches the first screw thread  11 , and the matching between the first screw thread  11  and the second screw thread  210  is configured to fix the fixing member  10  on the first end  21  of the main body  20 . 
         [0016]    The number of cores  30  are contained in the main body  20 . In at least one exemplary embodiment, the number of cores  30  are hard and have small-diameter. In at least one exemplary embodiment, the number of cores  30  are partially exposed out of the main body  20 . When the number of cores  30  are squeezed by the main body  20 , the number of cores  30  are in contact with each other and thus a cylinder is formed therebetween. In at least one exemplary embodiment, a number of through grooves  211  are defined in the first end  21  of the main body  20 . In at least one exemplary embodiment, the number of through grooves  211  are parallel and equidistant from each other. In at least one exemplary embodiment, a total number of the through grooves  211  equals four, five, or six. When the fixing member  10  is fixed on the main body  20 , the number of through grooves  211  being squeezed by the fixing member  10  cause the number of through grooves  211  to be in close contact with each other. Positional offset of the number of through grooves  211  is prevented. In at least one exemplary embodiment, a cross section of each of the number of cores  30  has a square shape. In other exemplary embodiments, the cross section of each of the number of cores  30  has a hexagon shape, or another polygon shape. 
         [0017]    The button  40  is configured on the second end  22  of the main body  20 . A first end of the button  40  resists against a first end of the number of cores  30 , and a second end of the button  40  is exposed out of the second end  22  of the main body  20 . In at least one exemplary embodiment, the button  40  has a cylinder shape and is made of elastic material. 
         [0018]    Refer to  FIG. 1 , in at least one exemplary embodiment, the main body  20  is enclosed by a cover  50 , except for the first end  21 . The cover  50  can be made of anti-slip material, thus it is easy for a user to hold the main body  20 . In other exemplary embodiments, the main body  20  is configured with screw thread except for the first end  21 , thus an anti-slip feature can be achieved. 
         [0019]    Refer to  FIG. 4 , when the user uses the screwdriver  1  to fasten a slot-headed screw (a line shaped screw  2 ), the user can manually control a first part of the number of cores  30  to aim at a line shaped groove  200  of the line shaped screw  2 , and can control other part of the number of cores  30  to rest on an upper surface of line shaped screw  2 . When the button  40  is pressed, the button  40  can drive the first part of the number of cores  30  to move toward to a bottom of the line shaped groove  200 . Therefore, when the first part of the number of cores  30  are inserted in the line shaped groove  200 , a line shaped head matching the line shaped screw  2  is formed by the first part of the number of cores  30  that are inserted in the line shaped groove  200 . 
         [0020]    Refer to  FIG. 5 , when the user uses the screwdriver  1  to fasten a Phillips-headed or similar head shape (cross shaped screw  2 ), the user can manually control a first part of the number of cores  30  to aim at a cross shaped groove  200  of the cross shaped screw  2 , and can control other part of the number of cores  30  to rest on an upper surface of cross shaped screw  2 . When the button  40  is pressed, the button  40  can drive the first part of the number of cores  30  to move toward to a bottom of the cross shaped groove  200 . Therefore, when the first part of the number of cores  30  are inserted in the cross shaped groove  200 , a cross shaped head matching the cross shaped screw  2  is formed by the first part of the number of cores  30  that are inserted in the cross shaped groove  200 . 
         [0021]    Refer to  FIG. 6 , when the user uses the screwdriver  1  to fasten a hexagon-headed screw (hexagon shaped screw  2 ), the user can manually control a first part of the number of cores  30  to aim at a hexagon shaped groove  200  of the hexagon shaped screw  2 , and can control other part of the number of cores  30  to rest on an upper surface of hexagon shaped screw  2 . When the button  40  is pressed, the button  40  can drive the first part of the number of cores  30  to move toward to a bottom of the hexagon shaped groove  200 . Therefore, when the first part of the number of cores  30  are inserted in the hexagon shaped groove  200 , a hexagon shaped head matching the hexagon shaped screw  2  is formed by the first part of the number of cores  30  that are inserted in the hexagon shaped groove  200 . 
         [0022]    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 particular the matters of shape, size, and arrangement of 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.