Abstract:
A stylus includes a shaft and a ring connected to the shaft. The shaft is at a periphery of the ring. The ring is configured to sleeve on a finger of a user. The stylus can be steadily sleeved on the finger and convenient for using. Further provide is an electronic device using the stylus.

Description:
BACKGROUND 
       [0001]    1. Technical Field 
         [0002]    The present disclosure generally relates to touch screen technology, and more particularly to a stylus and an electronic device using the same. 
         [0003]    2. Description of Related Art 
         [0004]    With the development of communication technology, more and more electronic devices, such as mobile phone and PDA (personal digital assistant), with touch panels, are widely used. Styluses are frequently used with these electronic devices. 
         [0005]    A stylus which with a fingerstall includes a main body and a nib formed at an end of the main body. The main body has a cylindrical sleeve and a pyramidal sleeve aligned coaxial with the cylindrical sleeve. The cylindrical sleeve receives a finger of a user and the pyramidal sleeve contacts a touch panel. A sidewall of the main body defines a gap along an axis thereof which can accommodate different sizes of finger. A protrusion with a hole is further formed on the sidewall of the main body, accepting a line or a cable therethrough providing attachment to the main body. 
         [0006]    In use, the main body of the stylus is sleeved on the finger, allowing single-digit of characters on the panel, wherein the stylus need not be held in conventional manner. 
         [0007]    However, when the main body of the stylus is sleeved on the finger, the inner-wall of the main body may abut the end of the user&#39;s finger, and the stylus may not be securely seated on the finger, impairing proper function. 
         [0008]    Therefore, there is room for improvement within the art. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0009]    The components in the drawings are not necessarily drawn to scale, the emphasis instead being placed upon clearly illustrating the principles of the present disclosure. Moreover, in the drawings, like reference numerals designate corresponding parts throughout several views, and all the views are schematic. 
           [0010]      FIG. 1  is an assembled, isometric view of an embodiment of a stylus and an embodiment of an electronic device applying the stylus. 
           [0011]      FIG. 2  is an exploded, isometric view of the electronic device of  FIG. 1 . 
       
    
    
     DETAILED DESCRIPTION 
       [0012]    The present stylus may be used with any electronic device with a touch panel, such as mobile phone, PDA, and others. Referring to  FIG. 1 , an embodiment of an electronic device  100  includes a main body  10  and a stylus  30  mounted thereon. 
         [0013]    Also referring to  FIG. 2 , the main body  10  has a first sidewall  11  and a second sidewall  13  adjacent and perpendicular to each other. The main body  10  defines a receiving portion  15  for the stylus  30 . The receiving portion  15  includes a first groove  151  communicating with a second groove  153 . The first sidewall  11  defines the first groove  151 , and the second sidewall  13  defines the second groove  153 . The second groove  153  is annular. Two sidewalls (not labeled) of the first groove  151  define a depression  1511  adjacent to the second groove  153  on each of the two sidewalls. A clapboard  1531  is formed in the second groove  153 . 
         [0014]    The stylus  30  includes a shaft  31  and a ring  33  connected to an end thereof. The shaft  31  is at a periphery of the ring  33 . That is, most of the ring  33  or even the entire ring  33  is on the same side of the shaft  31 . In the illustrated embodiment, the shaft  31  extends approximately parallel to the axis of the ring  33 . Here, the stylus  30  is plastic. 
         [0015]    The shaft  31  includes a nib  311  on an end thereof away from the ring  33 . The nib  311  is substantially tapered such that the contact area thereof allows precise data input in limited space. The shaft  31  includes a first side-surface  313 , a second side-surface  315  opposite thereto the first side-surface  313 , and two third side-surfaces  317  opposite to each other. The second side-surface  315  forms a friction portion  3151 , and in the illustrated embodiment, the friction portion  3151  is a plurality of protrusions protruding from the second side-surface  315  to enhance the friction between the second side-surface  315  and a finger (not shown) of a user. In the illustrated embodiment, a locating protrusion  3171  is formed on each of the third side-surfaces  317  to engage the depression. Alternatively, the location protrusion  3171  can be formed on one of the third side-surfaces  317 . Correspondingly, one of the two sidewalls of the first groove  151  forms a locating protrusion. 
         [0016]    The ring  33  has an outer surface  331  and defines an opening  333  away from the shaft  31 . The outer surface  331  connects with the first side-surface  313  of the shaft  31 . The opening  333  is away from a junction of the ring  33  and the shaft  31  so as to avoid weakening connection therebetween. The diameter of the ring  33  is adjustable, to accommodate different sizes of finger. 
         [0017]    In the electronic device  100 , the stylus  30  is received in receiving portion  15  of the main body  10 , at which time the inside wall (not labeled) of the first groove  151  resists the third side-surface  317  of the shaft  31  to deform the shaft  31 , and the locating protrusion  3171  engages the depression  1511  of the receiving portion  15 , thus the stylus  30  is steadily secured to the main body  10 . The ring  33  is received in the second groove  153 , and the clapboard  1531  in the second groove  153  engages the opening  333  of the ring  33  to prevent the ring  33  from moving. 
         [0018]    In use, the user just needs to push the shaft  31  out from the second groove  153  by pushing the friction portion  3151  of the shaft  31 , and draw the shaft  31  out from the first groove  151  by drawing the ring  33 , then sleeve the ring  33  on the appropriate position of a finger. The user is able to manipulate the stylus  30  just by one finger. 
         [0019]    In the electronic device  100 , the shaft  31  extends approximately parallel to the axis of the ring  33 , so when the ring  33  is placed on the finger, the shaft  31  extends approximately parallel to the finger. The opening  333  of the ring  33  allows the stylus  30  to be usable with different thickness fingers, providing secure grip thereof. Being made of plastic, the stylus  30  is of low cost. 
         [0020]    In alternative embodiments, the location protrusion  3171  and the depression  1511  may be positioned in other places, for example, the location protrusion  3171  may be formed on the outer surface  331  of the ring  33 , and the depression  1511  may be defined in the inner surface (not labeled) of the second groove  153 . The location protrusion  3171  and the depression  1511  may be omitted. The opening  333  of the ring  33  and the clapboard  1531  in the second groove  153  may be omitted. Instead, for example, the ring  33  is made of other material with higher elasticity. The inner diameter of the ring  33  can be changed according to the size of finger used. The shaft  31  may not extend parallel to the axis of the ring  33 , and may be perpendicular thereto. Correspondingly, the main body  10  may define the first groove  151  and the second groove  153  on one sidewall to receive the stylus  30 . 
         [0021]    Finally, while various embodiments have been described and illustrated, the disclosure is not to be construed as being limited thereto. Various modifications can be made to the embodiments by those skilled in the art without departing from the true spirit and scope of the disclosure as defined by the appended claims.