Patent Document

BACKGROUND OF THE INVENTION  
         [0001]    1. Field of the Invention  
           [0002]    The present invention relates to a wrench structure, and more particularly to a wrench structure that can be used to attract a small workpiece in a narrow space, thereby facilitating the operator using the wrench structure to operate the workpiece.  
           [0003]    2. Description of the Related Art  
           [0004]    A conventional socket wrench in accordance with the prior art comprises a wrench body having one end formed with a drive head which is provided with a square socket drive stub. In operation, the socket drive stub of the drive head of the wrench body may be inserted into a socket which is fitted on a workpiece such as a screw, a nut or the like, so that the wrench body can co-operate with the socket to operate and rotate the workpiece. However, the workpiece is easily detached from the socket during rotation. If the workpiece unintentionally falls into an elongated narrow space, the operator needs to use an elongated bar to take the workpiece out of the elongated narrow space, thereby causing inconvenience in operation.  
         SUMMARY OF THE INVENTION  
         [0005]    The present invention has arisen to mitigate and/or obviate the disadvantage of the conventional socket wrench.  
           [0006]    The primary objective of the present invention is to provide a wrench structure including a magnetic telescopic bar which is entirely hidden in the wrench body when not in use without occupy any space, thereby saving the space of the wrench structure.  
           [0007]    Another objective of the present invention is to provide a wrench structure including a magnetic telescopic bar which can be pulled outward from the wrench body when in use to attract a small workpiece made of metallic material in a narrow space, thereby facilitating the operator using the wrench structure to operate the workpiece.  
           [0008]    In accordance with the present invention, there is provided a wrench structure, comprising:  
           [0009]    a wrench body; and  
           [0010]    a magnetic telescopic bar selectively secured in a proper position of the wrench body;  
           [0011]    wherein, the magnetic telescopic bar is entirely hidden in the wrench body when not in use, and is pulled outward from the wrench body when in use to attract a small workpiece made of metallic material.  
           [0012]    Further benefits and advantages of the present invention will become apparent after a careful reading of the detailed description with appropriate reference to the accompanying drawings. 
       
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS  
       [0013]    [0013]FIG. 1 is a perspective view of a wrench structure in accordance with a first embodiment of the present invention;  
         [0014]    [0014]FIG. 2 is a perspective view of a magnetic telescopic bar of the wrench structure as shown in FIG. 1;  
         [0015]    [0015]FIG. 3 is a schematic operational view of the wrench structure as shown in FIG. 1 in use;  
         [0016]    [0016]FIG. 4 is an exploded perspective view of the wrench structure as shown in FIG. 1;  
         [0017]    [0017]FIG. 5 is an exploded perspective view of a wrench structure in accordance with a second embodiment of the present invention;  
         [0018]    [0018]FIG. 6 is a schematic operational view of the wrench structure as shown in FIG. 5 in use;  
         [0019]    [0019]FIG. 7 is an exploded perspective view of a wrench structure in accordance with a third embodiment of the present invention;  
         [0020]    [0020]FIG. 8 is a perspective assembly view of the wrench structure as shown in FIG. 7; and  
         [0021]    [0021]FIG. 9 is a schematic operational view of the wrench structure as shown in FIG. 8 in use. 
     
    
     DETAILED DESCRIPTION OF THE INVENTION  
       [0022]    Referring to the drawings and initially to FIGS.  1 - 3 , a wrench structure in accordance with a first embodiment of the present invention comprises a wrench body  10 , and a magnetic telescopic bar  40 .  
         [0023]    The wrench body  10  has a first end formed with a drive head  12 , and a second end formed with a receiving seat  11 . The drive head  12  of the wrench body  10  is provided with a square socket drive stub  14  defining a receiving chamber  140  therein. The receiving seat  11  of the wrench body  10  also defines a receiving chamber  11  therein.  
         [0024]    The magnetic telescopic bar  40  is secured in the receiving seat  11  of the wrench body  10 , and includes an outer tube  41  secured in the receiving chamber  110  of the receiving seat  11  of the wrench body  10 , a first inner tube  42  retractably mounted in the outer tube  41 , a second inner tube  43  retractably mounted in the first inner tube  42 , and a magnetic block  44  secured on the distal end of the second inner tube  43 .  
         [0025]    In operation, referring to FIG. 3 with reference to FIGS. 1 and 2, the socket drive stub  14  of the drive head  12  of the wrench body  10  is inserted into a socket (not shown) which is fitted on a workpiece  30  made of metallic material such as a screw, a nut or the like, so that the wrench body  10  can co-operate with the socket to rotate the workpiece  30 .  
         [0026]    The magnetic telescopic bar  40  is initially hidden in the receiving seat  11  of the wrench body  10  when not in use. In use, if the workpiece  30  is unintentionally detached from the socket and falls into a narrow space as shown in FIG. 3, the inner tubes  42  and  43  of the magnetic telescopic bar  40  can be pulled outward from the receiving seat  11  of the wrench body  10  quickly and easily, so that the magnetic block  44  of the magnetic telescopic bar  40  can be extended into the narrow space to attract the workpiece  30  by the magnetic force of the magnetic block  44  of the magnetic telescopic bar  40 , thereby drawing and taking the workpiece  30  out of the narrow space without needing the aid of other tools.  
         [0027]    The magnetic telescopic bar  40  is entirely hidden in the receiving seat  11  of the wrench body  10  when not in use, so that the magnetic telescopic bar  40  does not occupy any space, thereby facilitating operation of the wrench structure of the present invention.  
         [0028]    Referring to FIG. 4, the magnetic telescopic bar  40  may be secured in the receiving chamber  140  of the socket drive stub  14  of the drive head  12  of the wrench body  10 . Thus, when the socket drive stub  14  of the drive head  12  of the wrench body  10  is inserted into the socket, and the socket is fitted on the workpiece  30 , the workpiece  30  can be temporarily retained in the socket by the magnetic force of the magnetic block  44  of the magnetic telescopic bar  40 .  
         [0029]    Referring to FIG. 5, in accordance with a second embodiment of the present invention, the wrench body  10  is provided with a handle  50  formed with a receiving seat  51  defining a receiving chamber  510  for receiving and securing the magnetic telescopic bar  40  therein.  
         [0030]    Referring to FIG. 6, the magnetic telescopic bar  40  may be secured in the receiving chamber  140  of the socket drive stub  14  of the drive head  12  of the wrench body  10 . Thus, when the socket drive stub  14  of the drive head  12  of the wrench body  10  is inserted into the socket  20 , and the socket  20  is fitted on the workpiece  30 , the workpiece  30  can be temporarily retained in the socket  20  by the magnetic force of the magnetic block  44  of the magnetic telescopic bar  40 .  
         [0031]    Referring to FIGS.  7 - 9 , in accordance with a third embodiment of the present invention, the second end of the wrench body  10  is directly formed with an elongated receiving chamber  16  for receiving the magnetic telescopic bar  40  therein. A pivot pin  60  is extended through a through hole  17  defined in the second end of the wrench body  10 , and through a pivot hole  410  defined in the outer tube  41  of the magnetic telescopic bar  40 , so that the magnetic telescopic bar  40  is pivoted in the elongated receiving chamber of the wrench body  10 .  
         [0032]    The magnetic telescopic bar  40  is initially hidden in the elongated receiving chamber  16  of the wrench body  10  as shown in FIG. 8 when not in use. In use, the magnetic telescopic bar  40  may be pivoted about the pivot pin  60  to protrude outward from the elongated receiving chamber of the wrench body  10  to attract the workpiece.  
         [0033]    Although the invention has been explained in relation to its preferred embodiment as mentioned above, it is to be understood that many other possible modifications and variations can be made without departing from the scope of the present invention. It is, therefore, contemplated that the appended claim or claims will cover such modifications and variations that fall within the true scope of the invention.

Technology Category: b