Abstract:
A mouse with adjustable center of gravity has a casing and a weight. The casing has an accommodating space formed therein, and the weight is received in the accommodating space. The weight can be used to adjust easily the center of gravity of the mouse. Hence, the center of gravity of the mouse is adjustable according to the operation habit or different demands of a user, and the mouse is convenient and comfortable.

Description:
BACKGROUND OF THE INVENTION  
       [0001]     1. Field of the Invention  
         [0002]     The present invention relates to a mouse with an adjustable center of gravity, and particularly relates to a mouse having a center of gravity adjustable according to the operation habit or different demands of a user.  
         [0003]     2. Description of Related Art  
         [0004]     A mouse is an important tool for computer use. It is easy and convenient for a user to control a computer using a mouse. Therefore, the mouse is a necessary input device for different grades of computers. The optical mouse and mechanical mouse have been popular for a long time.  
         [0005]     The mechanical mouse has a ball installed in a bottom portion thereof. The ball has a plastic coating formed thereon. When the mouse is slid on a desk, the ball rolls and makes an X-direction roller and a Y-direction rotate. The rotation of the X-direction roller and the Y-direction roller is used to drive two decoding rollers, respectively. A light-emitting element is disposed on the decoding roller for emitting a visible light or an infrared light. When the light passes through the decoding roller to a receiving element of the mechanical mouse, a controlling circuit of the mechanical mouse will obtain a low potential. When the decoding roller shields the light from the light-emitting element, the receiving element is unable to receive the light. Therefore, the controlling circuit will obtain a high potential. The mechanical mouse thus obtains a serial low or high potential according to the rotation of the decoding roller. A CPU of the mechanical mouse is then used to process the low or high potential for detecting the direction and the location of the mouse.  
         [0006]     The optical mouse lacks the roller of the mechanical mouse, but has two sets of photoelectric detectors. The two sets of photoelectric detectors represent the X-direction and Y-direction, respectively. The optical mouse must be used on a special board. The special board has a plurality of nets formed thereon. When a light is emitted from a light-emitting element of the optical mouse to a space portion of the special board and is reflected from the special board to a receiving element of the optical mouse, a controlling circuit of the optical mouse will obtain a low potential. When a light is emitted on a line of the net of the special board and is absorbed by the line of the net, the receiving element is unable to receive the light. Therefore, the controlling circuit will obtain a high potential. A CPU of the optical mouse is used to process the low or high potential for detecting the direction and the location of the mouse.  
         [0007]     For both the optical mouse and mechanical mouse, the center of gravity of the mouse is fixed. The center of gravity of the mouse is thus not adjustable according to the operation habit (right or left) or different demands of user, and it is not convenient and comfortable for users to use the conventional mouse.  
       SUMMARY OF THE INVENTION  
       [0008]     The present invention provides a mouse with adjustable center of gravity. The mouse has a center of gravity adjustable according to the operation habit or different demands of user. Hence it is convenient and comfortable for users to use the mouse.  
         [0009]     One aspect of the invention is a mouse with adjustable center of gravity. The mouse comprises a casing and a weight. The casing has an accommodating space formed therein, and the weight is received in the accommodating space. The weight is used to adjust the center of gravity of the mouse.  
         [0010]     It is to be understood that both the foregoing general description and the following detailed description are exemplary, and are intended to provide further explanation of the invention as claimed. Other advantages and features of the invention will be apparent from the following description, drawings and claims. 
     
    
     BRIEF DESCRIPTION OF THE DRAWINGS  
       [0011]     The various objectives and advantages of the present invention will be more readily understood from the following detailed description when read in conjunction with the appended drawing, in which:  
         [0012]      FIG. 1  is a perspective, exploded view of the prevent invention;  
         [0013]      FIG. 2  is a perspective, assembled view of the prevent invention;  
         [0014]      FIG. 3  is a bottom view of the prevent invention;  
         [0015]      FIG. 4  is a top view of the prevent invention;  
         [0016]      FIG. 5  is a top view according to one embodiment of the prevent invention;  
         [0017]      FIG. 6  is a top view according to another embodiment of the prevent invention; and  
         [0018]      FIG. 7  is a top view according to further another embodiment of the prevent invention. 
     
    
     DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS  
       [0019]     Referring to  FIGS. 1 and 4 , the present invention provides a mouse for adjusting the center of gravity. The mouse includes a casing  1 , a cursor control module  2 , a plurality of keys  3 ,  4  and roller  5 . The casing  1  is a hollow casing, and has a PCB (not shown) assembled therein. The cursor control module  2  is mechanical or optical-type. The cursor control module  2  is assembled on the PCB. The cursor control module  2  electrically connects with the PCB, and is exposed from a bottom portion of the casing  1  for controlling the movement direction and distance of the cursor of the mouse. The keys  3 ,  4  and the roller  5  are disposed on the casing  1 , and electrically connect with the PCB. The function of the mouse of the present invention is sane as that of the prior art. In other words, the mouse can be used to execute commands from a function list, or select a word or pattern in on the computer screen, and scroll the display on the screen with roller  5 .  
         [0020]     The casing  1  has an accommodating space  11  formed in a top side thereof or any suitable location thereof. A weight  6  is received in the accommodating space  11 . The weight  6  with a flat shaped is made of heavy material, such as metal material. The weight  6  is smaller than the accommodating space  11 . The weight  6  can be received in any location of the accommodating space  11 .  
         [0021]     The weight  6  has a first fixed hole  61  and a second fixed hole  62 . The first fixed hole  61  and the second fixed hole  62  are circuit holes. A first fixed post  12  and a plurality of second fixed posts  13  are disposed in the accommodating space  11 . The first fixed hole  61  and the second fixed hole  62  correspond to the first fixed post  12  and the second fixed post  13 . The second fixed posts  13  are disposed on a front side, a front-left side and a front-right side of the first fixed post  12 . A distance between the first fixed post  12  and each the second fixed post  13  is the same as that between the first fixed hole  61  and the second fixed hole  62 .  
         [0022]     The first fixed hole  61  mates with the first fixed post  12 , and the second fixed hole  62  selectively mates with one of the second fixed posts  13 . The weight  6  can be rotated relative to the first fixed post  12  to three different locations (as shown in  FIGS. 4-6 ).  
         [0023]     A cover  7  is fixed over the accommodating space  11  by a retaining method for covering the weight  6  and the accommodating space  11 . The cover  7  can press the weight  6  to retain the weight  6  in the accommodating space  11 .  
         [0024]     The weight  6  is installed in the mouse to adjust the center of gravity of the mouse. Moreover, the center of gravity of the mouse is easily adjusted by changing the location of the weight  6 . The center of gravity of the mouse can thus be adjusted according to personal preference when using the mouse.  
         [0025]     Referring to  FIG. 7 , a display device  8  is disposed on the casing  1  for showing the location of the weight  6 . The display device  8  has a plurality of indicator lights  81  corresponding to the second fixed posts  13 . The first fixed post  12  has a first conductive point  82  formed thereon. Each of the second fixed posts  13  has a second conductive point  83  formed thereon. The first conductive point  82  and the second conductive points are made of metal materials with good conductibility. The first conductive point  82  and -the second conductive point  83  can be electrically connected with the first fixed hole  61  and the second fixed hole  62 , respectively. The indicator lights  81 , the first conductive point and the second conductive points are electrically connected to a PCB (not shown in FIG.).  
         [0026]     When the location of the weight  6  is varied, the first conductive point  82  of the first fixed post  12  can be electrically connected to one of the second conductive points  83  of the second fixed posts  13  that mates with the weight  6 . Therefore, the indicator light  81  that corresponds to the second conductive point  83  is illuminated. The indicator lights can thus be used to show the location of the weight  6  without opening the cover  7 .  
         [0027]     Although the present invention has been described with reference to the preferred embodiment thereof, it will be understood that the invention is not limited to the details thereof. Various substitutions and modifications have been suggested in the foregoing description, and others will occur to those of ordinary skill in the art. Therefore, all such substitutions and modifications are intended to be embraced within the scope of the invention as defined in the appended claims.