Abstract:
A mouse includes a casing, a light, a switch, and a supporting device. The casing includes a base plate and a top cover covering the base plate. The top cover defines a receiving hole. The switch is electrically connected to the light and used to turn the light on and off. The supporting device is movably accommodated in the receiving hole and supports the light. The supporting device is capable of moving out of the receiving hole.

Description:
BACKGROUND 
     1. Technical Field 
     The present disclosure relates to computer mouses and, particularly, to a mouse having illuminating functions. 
     2. Description of Related Art 
     It is very difficult to distinguish characters printed on a keyboard of a computer in a dark environment, and thus users cannot easily operate the keyboard. 
     Therefore, it is desirable to provide a mouse that can overcome the above-mentioned limitations. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       Many aspects of the embodiments should 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 present disclosure. Moreover, in the drawings, like reference numerals designate corresponding parts throughout the several views. 
         FIG. 1  is a schematic view of a mouse including a light, according to an exemplary embodiment, showing the light in a first state. 
         FIG. 2  is similar to  FIG. 1 , but showing the light in a second state. 
         FIG. 3  is a partially exploded view of the mouse of  FIG. 1 . 
         FIG. 4  is a partially enlarged view of the mouse of  FIG. 3 . 
     
    
    
     DETAILED DESCRIPTION 
     Referring to  FIGS. 1-3 , a mouse  10 , according to an embodiment, includes a casing  100 , a printed circuit board (PCB)  200 , a cable  300 , a battery  400 , a supporting device  500 , a light  600 , and a switch  700 . 
     Also referring to  FIG. 4 , the casing  100  is hollow, and includes a bottom plate  102  and a cover  104 . The cover  104  includes a top plate  106 , a left-mouse-click key  107   a , a right-mouse-click key  107   b , and a side plate  108 . The side plate  108  defines a cylinder-shaped receiving hole  112  adjacent to the left-mouse-click key  107   a . The receiving hole  112  includes a first hole portion  112   a , a second hole portion  112   b , and a third hole portion  112   c  from inwards to outwards. The diameter of the first hole portion  112   a  is larger than that of the second hole portion  112   b . The third hole portion  112   c  is shaped for receiving the light  600 . 
     The PCB  200  is received in the casing  100 , and includes a power end  202  electrically connected to the cable  300 , and thus the PCB  200  is electrically connected to a computer (not shown). When the cable  300  is electrically connected to the computer, the power end  202  obtains working power for the PCB  200 . The battery  400  is received in the casing  100 , and is electrically connected to the power end  202 , and can be charged by the computer. 
     The supporting device  500  includes a cylindrical fixing portion  501  and an extending portion  502 . The fixing portion  501  includes a fixing end  503  and a connecting end  505 . The diameter of the fixing end  503  is substantially equal to that of the first hole portion  112   a . The diameter of the connecting end  505  is less than that of the fixing end  503 , and slightly smaller than that of the second hole portion  112   b . The fixing end  503  can slide along the axial direction in the receiving hole  112  and can rotate in the receiving hole  112 . The connecting end  505  can slide to extend from the receiving hole  112 . 
     The extending portion  502  includes a cylinder-shaped first pipe  504  and a cylinder-shaped second pipe  506 . The diameter of the first pipe  504  is larger than that of the second pipe  506 . The diameter of the first pipe  504  is substantially equal to that of the connecting end  505 . One end of the first pipe  504  is rotatably connected to the connecting end  505 . The second pipe  506  is partially received in the first pipe  504  and can slide in the first pipe  504 . The light  600  is electrically connected to one end of the second pipe  506  extending outwards from the first pipe  504 . The frictional force between the first pipe  504  and the second pipe  506  is larger than that between the fixing end  503  and the inner sidewall of the receiving hole  112 . Thus, the supporting device  500  can be telescopically extended, rotated, and pivoted to aim the light  600  to illuminate as desired. 
     The switch  700  is arranged on the side plate  108 , and is electrically connected to the light  600 , the power end  202 , and the battery  400 , and can be used to turn the light  600  on and off. In this embodiment, the switch  700  has a first position, a second position, and a third position. When the switch  700  is in the first position, the light  600  is electrically connected to the power end  202  and turns on. When the switch  700  is in the second position, the light  600  is turned off. When the switch  700  is in the third position, the light  600  is electrically connected to the battery  400  and turns on. In this embodiment, the light  600  is a light emitting diode (LED) with high brightness. 
     In use, when the cable  300  is electrically connected to the computer, the mouse is powered on and the battery  400  can be automatically charged as needed. When a user wants to use the light  600  they can simply pull the support  500  to extend from the hole  112  and pivot and rotate the light  600  to aim it as desired and set the switch  700  to the first position. Even when the mouse is not connected to the computer, the light may be used by setting the switch  700  to the third position so that it can run on battery  400  power. 
     The receiving hole  112  is defined in the side plate  108  adjacent to the left-mouse-click key  107   a  to prevent the receiving hole  112  from being shielded by the user&#39;s hand when the user operates the mouse  10 . The switch  700  is disposed on the side plate  108  away from the cable  300  convenient for the user to operate. 
     In other embodiments, the location of the receiving hole  112  and the switch  700  is not limited to this embodiment. For example, the switch  700  may be disposed on the top plate  106  out of the way of the user&#39;s hand, and thus the fixing portion  501  for rotating the extending portion  502  can be omitted. 
     It will be understood that the above particular embodiments are shown and described by way of illustration only. The principles and the features of the present disclosure may be employed in various and numerous embodiments thereof without departing from the scope of the disclosure as claimed. The above-described embodiments illustrate the scope of the disclosure but do not restrict the scope of the disclosure.