Abstract:
The present invention is related to a keyless pointer input device, especially to a pointer input device including a control circuit, an optical sensor for detecting the movement of the pointer device and generating respective displacement, a ball shaft type key control element, a bottom plate, and an upper cover casing capable of being moved slightly. Then main parts can be assembled to the upper cover casing. The keyless pointer input device of the present invention is keyless on the appearance of the device. Therefore, the keyless pointer input device can be integral formed with a seat. The ball shaft type key control element is used to cause key signals to be generated by moving the upper cover casing.

Description:
BACKGROUND OF THE INVENTION  
         [0001]    1. Field of the Invention  
           [0002]    The present invention is related to a keyless pointer input device, especially to a pointer input device including a control circuit, an optical sensor for detecting the movement of the pointer device and generating respective displacement, a ball shaft type key control element, a bottom plate, and an upper cover casing capable of being moved slightly. Then main parts can be assembled to the upper cover casing. The keyless pointer input device of the present invention is keyless on the appearance of the device. Therefore, the keyless pointer input device can be integral formed with a seat. The ball shaft type key control element is used to generate key signals by moving the upper cover casing.  
           [0003]    2. Description of the Related Art  
           [0004]    In current computer age, computers have become a popular device and have been widely used. Moreover, the graphic user interface (GUI) is a necessary device for controlling the movement of icons so as to control the operations of a computer. Thus, currently, some application programs, Internet, visual realities, etc. adapts GUI as an unique standard. Furthermore, trace balls, mice, and other pointer devices become necessary devices for operation the interface.  
           [0005]    Referring to FIG. 1, a prior art pointer input device, for example, a mouse is illustrated. The appearances of conventional pointer devices are similar and dull. Keys are disposed at proper positions for being pressed by fingers directly. However, this will induce some injury to fingers. Furthermore, it is possible the muscles of finger will irritate and inflate so as to press the nerve tunnel, such as carpal tunnel. This is a general disease in the computer age.  
           [0006]    Accordingly, the primary object of the present invention is to provide a keyless pointer input device, wherein no key is formed on the appearance of a pointer input device. The switching of the key is unnecessary to be operated by fingers. Therefore, the keyless pointer input device has a compact size and can be designed as a decoration with a desired shape, as illustrated in FIG. 2.  
           [0007]    Other than improving the defects in the portion pointer device, by the present invention, the outlook of the pointer device becomes interest. By matching of various parts, a keyless pointer input device is formed. Furthermore, the present invention has a compact volume and no key presents on the outlook. The present invention may be matched with a decoration so as to present various interesting outlooks. The dull outlook in the conventional mouse is improved.  
           [0008]    The various objects and advantages of the present invention will be more readily understood from the following detailed description when read in conjunction with the appended drawing.  
       
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS  
       [0009]    [0009]FIG. 1 is a perspective view of a conventional pointer input mouse.  
         [0010]    [0010]FIG. 2 is a perspective view showing that the keyless pointer input device of the present invention is applied to a decoration.  
         [0011]    [0011]FIG. 3 is an assembled structural view of the keyless pointer input device of the present invention.  
         [0012]    [0012]FIG. 4 is a partial cross section view of the keyless pointer input device of the present invention.  
         [0013]    [0013]FIG. 5 is a perspective view of the ball shaft type key control element.  
         [0014]    [0014]FIG. 6 is a cross section view of the keyless pointer input device of the present invention.  
         [0015]    [0015]FIGS. 7A, 7B and  7 C are schematic views showing the swinging position of the present invention.  
         [0016]    [0016]FIG. 8 is a schematic view showing that the ball shaft arm of the present invention cause a right shift key to move.  
         [0017]    [0017]FIG. 9 is a schematic view showing that the ball shaft arm of the present invention moves a left shift key.  
         [0018]    [0018]FIG. 10 shows another the present invention of the ball shaft type key control element of the present invention.  
         [0019]    [0019]FIG. 11 is a cross section view of the ball shaft type key control element of the present invention.  
         [0020]    [0020]FIGS. 12A, 12B,  12 C and  12 D are schematic view showing various swinging conditions of the ball shaft arm of the present invention.  
     
    
     DETAILED DESCRIPTION OF THE INVENTION  
       [0021]    In order that those skilled in the art can further understand the present invention, a description will be described in the following in details. However, these descriptions and the appended drawings are only used to cause those skilled in the art to understand the objects, features, and characteristics of the present invention, but not to be used to confine the scope and spirit of the present invention defined in the appended claims.  
         [0022]    Referring to FIGS. 3 and 4, an assembled structure view and partial schematic view of the keyless pointer input device of the present invention are illustrated. The keyless pointer input device of the present invention many includes a bottom plate  3  and an upper cover casing  2 . Other parts of the keyless pointer input device is included in the casing  2 , which mainly includes a main control circuit  5  for processing pointer signal. It is connected to a host through a signal transmission line  4 . An optical sensor  8  is used to detect the movement of the pointer device. Therefore, a corresponding cursor displacement signal is provided to the control circuit  5 . A ball shaft type key control element is installed at a proper position of the bottom plate  3  for switching the key.  
         [0023]    The perspective view of the structure of the ball shaft type key control element is illustrated in FIG. 5, and the cross section view thereof is illustrated in FIG. 6. The ball shaft type key control element includes a ball shaft seat  10  in which a ball shaft  17  is installed. The ball shaft  7  may be engaged to the seat  10  and may rotate freely around the ball shaft center. A projected ball shaft arm  16  is installed on the ball shaft  17 . The ball shaft  17  and the ball shaft arm  16  may move within a range confined by a notch  21  in the ball shaft seat  10 . The lower side of the ball shaft seat  10  is installed with a fixing rib  20 . Thereby, it can be steadily placed on the bottom plate  3 .  
         [0024]    A proper restoring arm  12  is installed on the ball shaft arm  16 . The lower front end has a round protrusion which is capable of being coupled to a restoring spring fixing post  18 . The restoring spring  7  encloses the post. Thereby, the restoring spring  7  is fixed thereon. Through the elastic force of the restoring spring  7 , the ball shaft arm  16  shifted due to a pressed key is pushed back to a predetermined position. As shown in the FIGS. 3 and 4.  
         [0025]    The restoring arms  12  are installed with touching plates  13 - 1 ,  13 ,  2  at positions with respect to the ball shaft arm  16  for pressing and releasing key switches  6 - 1  and  6 - 2 . The top of the ball shaft arm  16  has an upper cover fixing piece  11 . The four corners thereof are formed with screw holes  19 ′. Thereby, the upper cover casing  2  can be screwed by screws  19 . The upper cover casing  2  covers on the bottom plate  3 . The upper cover casing  2  has a rib  15 . Upper cover positioning plate  14  is extended from the rib  15 . A positioning hook  9  is formed with a notch for being buckled with the upper cover positioning plate  14 . Thus, the upper cover casing  2  is positioned. Therefore, the upper cover casing  2  movably covers the bottom plate  3 .  
         [0026]    The upper cover casing  2  covers the bottom plate  3  by fixing to the upper cover fixing piece  11 . Therefore, the upper cover casing  2  may shift and swing around the ball shaft center so as to touch the key switches  6 - 1 ,  6 - 2  through the touching plate  13 - 1 , and touching plate  13 - 2  to generate key signals.  
         [0027]    Further, referring to FIGS. 7A to  7 C, the schematic view showing various movement of the of the ball shaft arm of the present invention. A notch  21  for confining swinging is formed on the ball shaft seat  10 . Thereby, the ball shaft arm  16  is confined in the notch for swinging within a proper direction. The swinging confining notch  21  is formed so as to confine a key to swing within a proper angle. Thereby, the ball shaft arm  16  is confined within the left and right sides  16 -L and  16 -R, as illustrated in FIGS. 7B and 7C. Thereby, the key switch at any position can be touched. When no key is operated, the ball shaft arm  16  is positioned at a middle position, as shown in the FIG. 7A.  
         [0028]    Referring to FIGS. 8 and 9, the schematic views of the right shift key and left shift key of the ball shaft type key control element of the present invention are illustrated. The upper cover casing  2  can be shifted with a proper angle according to the practical requirement. Thereby, the ball shaft arm  16  swings in the confinement of the notch  21  installed on the ball shaft seat  10 . Thereby, the touching plate  13 - 1  and touching plate  13 - 2  touch the key switches  6 - 1 ,  6 - 2  so as to generate the requirement signal of the pointer.  
         [0029]    Referring to FIGS. 10 and 11, another embodiment of the ball shaft type key control element of the present invention are illustrated. A ball shaft  103  is properly engaged in the ball shaft seat  101 . The ball shaft  103  may rotate freely around the axial center of the ball shaft  103 . A notch is formed on the ball shaft seat  101 . The round notch of the ball shaft  103  is extended with the post-like ball shaft arm  102  so that the movement of the ball shaft  103  is confined in the ball shaft seat  101  due to the ball shaft arm  102 . An elastic bearing seat  105  is installed at a proper position of the ball shaft arm  102 . Thereby, the ball shaft arm  102  passes through the swing-confining frame  107  in the elastic bearing seat  105 . The elastic bearing seat  105  is fixed to the post  104  so that the ball shaft arm  102  is confined to move only within the swing-confining frame  107 .  
         [0030]    The elastic bearing seat  105  has a restoring elastic piece  106  for restoring the ball shaft arm  102  to a predetermined position. The restoring elastic piece  106  have a plurality of elastic claws. The claws are installed at positions of maximum swinging within the swing-confining frame  107  and are against the ball shaft arm  102  so that as the ball shaft arm  102  swings around the ball shaft  103 , it may restores to the middle position due to the restoring elastic piece  106 .  
         [0031]    With reference to FIGS. 12A, 12B,  12 C and  12 D, the movement of the ball shaft arm of the present invention is illustrated. A swing-confining frame  107  with a proper angle is installed on the elastic bearing seat  105  so that the ball shaft arm  102  is confined to swing upwards to a proper angle  102 -U by the confinement of the swing-confining frame  107 , or to swing leftwards to a proper angle  102 -L, or to swing rightwards to a proper angle  102 -R. When the ball shaft arm  102  is not shifted by outer force, the ball shaft arm  102  will restore to the initial middle position due to the restoring force of the restoring elastic piece  106 .  
         [0032]    The key switches  6  and touching plates  13  are installed at proper positions with respect to the shift of the ball shaft arm  102 . Thereby, the object of pressing key switches can be achieved by controlling the movement of the ball shaft arm  102 .  
         [0033]    Since the upper cover casing  2  is fixed to one end of the ball shaft arm  102 . In application, the upper cover casing  2  may be properly matched to the decoration  1  so as to form a complete pointer input device, as shown in the FIG. 2.  
         [0034]    In the embodiment, different key operation may be generated based on the design angle for the decoration  1  or upper cover casing  2 . The designed swinging angle and the way for touching the keys may avoid the mistake during the movement of the pointer device.  
         [0035]    Thereby, from above description, by matching of various parts, a keyless pointer input device is formed. Furthermore, the present invention has a compact volume and no key presents on the outlook. The present invention may be matched with a decoration so as to present various interesting outlooks. The dull outlook in the conventional mouse is improved.  
         [0036]    Although the present invention has been described with reference to the preferred embodiments, it will be understood that the invention is not limited to the details described 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.