Patent Publication Number: US-2018043514-A1

Title: Interference fit screwdriver tip and powered screwdriver using the same

Description:
CROSS REFERENCE TO RELATED APPLICATION 
     This application claims priority to Chinese Patent Application No. 201610650528.2, filed Aug. 10, 2016, the disclosure of which is incorporated herein by reference in its entirety. 
     FIELD 
     The present disclosure relates to powered screwdrivers, and more particularly to an interference fit screwdriver tip and a powered screwdriver using the same. 
     BACKGROUND 
     A conventional method for securing and screwing a screw head is to use a magnetic screwdriver tip to attract the screw. However, the method of using the magnetic screwdriver tip is not suitable for non-magnetic elements. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       Many aspects of the disclosure can be better understood with reference to the following drawings. The components in the drawings are not necessarily drawn to scale, the emphasis instead being placed upon clearly illustrating the principles of the disclosure. Moreover, in the drawings, like reference numerals designate corresponding parts throughout the several views. 
         FIG. 1  is a top perspective view of a powered screwdriver. 
         FIG. 2  is an enlarged view of the area II of  FIG. 1 . 
         FIG. 3  is an enlarged bottom perspective view of a screwdriver tip of the powered screwdriver of  FIG. 1 . 
     
    
    
     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. In addition, numerous specific details are set forth in order to provide a thorough understanding of the exemplary embodiments described herein. However, it will be understood by those of ordinary skill in the art that the exemplary 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. Also, the description is not to be considered as limiting the scope of the exemplary embodiments described herein. The drawings are not necessarily to scale and the proportions of certain parts may be exaggerated to better illustrate details and features of the present disclosure. 
     With reference to  FIG. 1 , an exemplary embodiment of a powered screwdriver  1  includes a handle  12 , a bit  11 , and a tip  13 . The bit  11  has two ends. One end of the bit  11  is attached to the handle  12 , and the tip  13  is located at the other end of the bit  11 . With reference to  FIGS. 2 and 3 , the tip  13  has an engaging portion  130  and at least one resilient member  133 . 
     The engaging portion  130  has at least one end. In the present exemplary embodiment, the engaging portion  130  is cross-shaped and therefore has four ends. In other exemplary embodiments, the engaging portion  130  is flat and has two ends. 
     The number of the at least one resilient members  133  is equal to the number of the at least one end of the engaging portion  130 . The at least one resilient member  133  corresponds to and is attached to the at least one end of the engaging portion  130 . The engaging portion  130  is made of cemented carbide, and the resilient member  133  is made of a resilient plastic or a resilient metal. In the present exemplary embodiment, the resilient member  133  is a wedge-shaped block. 
     With reference to  FIG. 1 , in the present exemplary embodiment, the handle  12  has a switch  121  for a user to actuate the powered screwdriver  1 . 
     With reference to  FIG. 2 , in the present exemplary embodiment, the powered screwdriver  1  is used for turning a screw  2 . The screw  2  has a screw shank  22  and a screw head  21  with a cross slot  23 . The engaging member  130  can be inserted into the cross slot  23  of the screw head  21  by an interference fit between the resilient member  133  and surfaces of the cross slot  23 , thus achieving a precision fit and total engagement. The method of using the tip  13  to insert into the screw head  21  as an interference fit is suitable for all types and conditions of screws  2 . 
     The exemplary embodiments shown and described above are only examples. Many details are often found in the art such as the other features of a powered screwdriver. Therefore, many such details are neither shown nor described. 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, especially 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. It will therefore be appreciated that the exemplary embodiments described above may be modified within the scope of the claims.