Abstract:
An adapter that electrically couples a portable touchpad keyboard to a portable electronic appliance, wherein the adapter couples a proprietary connector of a portable electronic appliance to an interface of the portable touchpad keyboard through a modified pin connector assembly, and wherein the portable touchpad keyboard also includes a physical support assembly on a bottom portion thereof, wherein the support assembly is unfolded and extended partway therefrom to thereby provide a physical support area on which to rest the portable electronic appliance, wherein the support assembly is unfolded in order to extend the support assembly far enough away from the portable touchpad keyboard to thereby support portable electronic appliances whose physical dimensions are relatively long when compared to a width of the portable touchpad keyboard.

Description:
CROSS REFERENCE TO RELATED APPLICATIONS  
       [0001]    This document claims priority to U.S. Provisional Patent Application Serial No. 60/259,756, and entitled CONNECTOR AND SUPPORT SYSTEM FOR A TOUCHPAD KEYBOARD FOR USE WITH PORTABLE ELECTRONIC APPLIANCES. 
     
    
     
       BACKGROUND  
         [0002]    1. The Field of the Invention  
           [0003]    This invention relates generally to a system for coupling a touchpad-based keyboard to a portable electronic appliance, wherein the system includes providing physical support for the portable electronic appliance when coupled to the touchpad keyboard, and interchangeable connectors that enable a plurality of different portable electronic appliances to be coupled to the same touchpad keyboard.  
           [0004]    2. Background of the Invention  
           [0005]    The prior art of portable keyboards that can be coupled to portable electronic appliances includes mechanical keyboards. These mechanical keyboards apparently are of two different designs. The first design is generally smaller than a normal desktop-type keyboard, but is considered to be portable, or to at least be capable of being connected to a portable electronic appliance. The keys are discrete but small mechanical buttons, and so the design of the keyboard is simply smaller than a standard keyboard. It should be mentioned that the portable electronic devices include personal digital assistants (PDAs).  
           [0006]    The next type of portable keyboard design is more mechanically complex than a miniaturized keyboard described above because it is designed to be more portable. The complexity comes from the desire to enable the keyboard to collapse so that it can be carried more easily. A collapsing keyboard is one that can be folded to a relatively compact shape. For example, a collapsible keyboard of the prior art will fold to make four different sections. The sections are relatively thin, but when stacked on top of each other in a folded position, the thickness is often greater than the thickness of even the largest PDA.  
           [0007]    The collapsible keyboards are also mechanical in nature. That is, the buttons are mechanical, but generally larger than the keys found in a non-collapsible keyboard. This is because the ability to fold enables the keyboard to assume larger dimensions when unfolded into a usable position than the non-collapsible keyboards.  
           [0008]    It has been observed that despite the proliferation of portable electronic devices, there are generally no standard interfaces to them. Furthermore, the interfaces, even along a product line of a single company continue to evolve. Thus, a portable keyboard must be designed specifically for each type of portable electronic device. This can become expensive for a purchaser and the manufacturer. This also reduces the ability of the manufacturer to respond to market demands because an entire keyboard must be manufactured, instead of taking an existing keyboard and providing an adapter that is specific to the portable electronic device.  
           [0009]    Thus, it would be an advantage over the prior art to provide a single portable keyboard that was adaptable for use with a plurality of different portable electronic devices by providing an adapter.  
           [0010]    It is also the case that the prior art portable mechanical keyboards are relatively large when compared to the size of the portable electronic device to which they are coupled.  
           [0011]    Accordingly, it would be another advantage to provide a smaller portable keyboard that can be used with the plurality of different portable electronic devices, through the use of the adapter.  
           [0012]    It is also noted that the portable mechanical keyboards of the prior art are generally more susceptible to breaking than a standard desktop keyboard. This is probably a function of the environment in which the keyboards operate. In other words, a portable device is going to be knocked around and receive rougher treatment than a stationary keyboard.  
           [0013]    Accordingly, it would be another advantage to provide a keyboard input device for use with the adapters that is not as susceptible to damage as are the portable keyboards that have mechanical keys.  
         SUMMARY OF THE INVENTION  
         [0014]    It is an object of the present invention to provide a connector and physical support system that enables a portable touchpad keyboard to be used with a plurality of different portable electronic appliances.  
           [0015]    It is another object to provide a connector and support system that enables the portable touchpad keyboard to be used with the plurality of different portable electronic appliances by using an appropriate adapter selected from a plurality of adapters.  
           [0016]    It is another object to provide a connector and physical support system that lowers costs for using a portable touchpad keyboard with a plurality of different portable electronic appliances by providing a portable touchpad keyboard that can be used with all of the portable electronic appliances.  
           [0017]    It is another object to provide a connector and physical support system that provides a modified pin connector in the adapter that couples the portable touchpad keyboard to the portable electronic appliance.  
           [0018]    In a preferred embodiment, the present invention is an adapter that electrically couples a portable touchpad keyboard to a portable electronic appliance, wherein the adapter couples a proprietary connector of a portable electronic appliance to an interface of the portable touchpad keyboard through a modified pin connector assembly, and wherein the portable touchpad keyboard also includes a physical support assembly on a bottom portion thereof, wherein the support assembly is unfolded and extended partway therefrom to thereby provide a physical support area on which to rest the portable electronic appliance, wherein the support assembly is unfolded in order to extend the support assembly far enough away from the portable touchpad keyboard to thereby support portable electronic appliances whose physical dimensions are relatively long when compared to a width of the portable touchpad keyboard.  
           [0019]    In a first aspect of the invention, the modified pin connection is comprised of a saddle mount connector for coupling an adapter to an electronic circuit board of the portable touchpad keyboard.  
           [0020]    In a second aspect of the invention, the saddle mount connector includes a tuning fork pin which couples the adapter to the PC board at a right angle.  
           [0021]    In a third aspect of the invention, the support assembly pivots outward away from the underside of the portable touchpad keyboard to thereby extend itself beneath the portable electronic appliance, and thereby form a triangular support system.  
           [0022]    These and other objects, features, advantages and alternative aspects of the present invention will become apparent to those skilled in the art from a consideration of the following detailed description taken in combination with the accompanying drawings. 
       
    
    
     DESCRIPTION OF THE DRAWINGS  
       [0023]    [0023]FIG. 1 is a perspective view of a physical support assembly and a portable touchpad keyboard.  
         [0024]    [0024]FIG. 2 is a perspective view of the physical support assembly and the portable touchpad keyboard of FIG. 1 as seen from below, and a portable electronic appliance.  
         [0025]    [0025]FIG. 3 is a perspective view of the physical support structure.  
         [0026]    [0026]FIG. 4 is a perspective view of the physical support assembly, the portable touchpad keyboard, and the portable electronic appliance, with the physical support assembly folded away.  
         [0027]    [0027]FIG. 5 is a different perspective view of the physical support assembly and the portable touchpad keyboard.  
         [0028]    [0028]FIG. 6 is a profile view of the physical support assembly, the portable touchpad keyboard, and the portable electronic appliance.  
         [0029]    [0029]FIG. 7 is a perspective view of the adapter.  
         [0030]    [0030]FIG. 8 is a different perspective view of the adapter.  
         [0031]    [0031]FIG. 9 is a perspective view of the adapter coupled to the portable touchpad keyboard.  
         [0032]    [0032]FIG. 10 is a perspective view of the portable touchpad keyboard shown in FIG. 9 with the adapter removed.  
         [0033]    [0033]FIG. 11 is a profile view of an adapter that is about to be coupled to an electrical connector housing that is disposed in the portable touchpad keyboard. 
     
    
     DETAILED DESCRIPTION  
       [0034]    Reference will now be made to the drawings in which the various elements of the present invention will be given numerical designations and in which the invention will be discussed so as to enable one skilled in the art to make and use the invention. It is to be understood that the following description is only exemplary of the principles of the present invention, and should not be viewed as narrowing the claims which follow.  
         [0035]    The presently preferred embodiment of the invention is an adapter that is coupled between a portable touchpad keyboard and a portable electronic appliance such as a personal digital assistant or mobile telephone. The specific portable electronic appliance being used is not an aspect of the invention. It is only relevant in the sense that the device being coupled to the portable touchpad keyboard is generally going to be portable to take advantage of the relatively small size of the keyboard. For example, it is envisioned that the present invention will be used with a PDA in a meeting or while traveling, to enable a user to couple the portable touchpad keyboard to the PDA and thereby more conveniently and rapidly enter information.  
         [0036]    The present invention is really two items that enable the portable touchpad keyboard to be usable with a plurality of different portable electronic appliances. The first item is the adapter that includes a modified pin connection assembly. The second item is a physical support assembly that enables the portable touchpad keyboard to be disposed at a convenient angle when resting on a flat surface so that a display screen in the portable electronic appliance is easily viewable while using the portable touchpad keyboard. The flat surface could be a desktop, counter top, or even a book placed on a user&#39;s lap.  
         [0037]    The first item is related to the second item in that the adapter is designed having an angle. The angle is such that the portable electronic appliance is tilted at an angle that is convenient for viewing the display screen. But the combination of the portable touchpad keyboard and most portable electronic appliances is such that the combination will fall over, putting the keyboard in an unusable position. Accordingly, the physical support assembly provides the support that is required to hold up the portable electronic appliance while the portable touchpad keyboard is being used. With this explanation, it is now possible to illustrate the components of the invention.  
         [0038]    [0038]FIG. 1 is a perspective view of a portion of the physical support assembly  10 , a portion of an adapter  12 , and a portable touchpad keyboard  14 . The visible portion of the physical support assembly  10  includes a first support leg assembly  16 , and a second support leg assembly  18 .  
         [0039]    Is a perspective view of a back side of the portable touchpad keyboard  14 , the physical support assembly  10 , and of a portable electronic appliance  20  shown in a position where it is coupled to the adapter  12 . This view illustrates some important detail regarding the physical support assembly  10 . Specifically, grooves or channels  22  are shown embedded into a back side  24  of the portable touchpad keyboard  14 . These channels  22  correspond to the shape of the physical support assembly  10  when it is folded up and not in use. The physical support assembly  10  essentially snaps into place in the channels  22 . A friction snap is preferably disposed at a pivot axis  24 . The pivot axis  24  swings back toward the portable touchpad keyboard  14  and engages a corresponding friction point  26 .  
         [0040]    This figure also shows that the first support leg assembly  16  is essentially parallel to the back side  30  of the portable electronic appliance  20 . The first support leg assembly is generally going to be flush against the back side  30 , but this is not required. It is simply preferable to have the first support leg assembly  16  make as much contact as possible to increase stability of the combination.  
         [0041]    The physical support assembly  10  is obviously shown in a folded out position. In order to minimize the amount of space that it occupies, the first support leg assembly  16  has a channel  32  along each side. The channel  32  enables the second support leg assembly  18  to lay inside the first support leg assembly when folded. When unfolded along pivot axis  24 , the first and second support leg assemblies  16 ,  18  make a triangular shape relative to a flat resting surface as shown in FIG. 1.  
         [0042]    [0042]FIG. 2 also shows that a third support leg assembly  28  is coupled to the first support leg assembly  16  at pivot points  34 . The third support leg assembly  28  is pivotally engaged to the back side  24  of the portable touchpad keyboard  14  along pivot axis  36 .  
         [0043]    It should be possible to understand that the first function of the third leg support assembly  28  is to simply extend the physical support assembly  10  away from the portable touchpad keyboard  14  so as not to interfere with the adapter  12  when unfolded.  
         [0044]    The second function of the third support leg assembly  28  is to extend the physical support assembly  10  far enough under the portable electronic appliance  20  to enable the combination to balance correctly, and remain upright. One reason is that the portable touchpad keyboard  14  is relatively light, and therefore will not likely anchor the combination by its own weight.  
         [0045]    It is useful to remember the reason for providing the physical support assembly  10  in the first place. By disposing the physical support assembly  10  underneath the portable touchpad keyboard  14 , it can be kept out of the way if it is not being used. In other words, it is possible to use the portable touchpad keyboard  14  in combination with the portable electronic appliance  20  without setting them down on a surface. The portable touchpad keyboard  14  is very light. It is also usable by just holding and supporting the portable electronic appliance  20  in a user&#39;s single hand. One hand holds the combination, and the other hand enters data by tapping keys on the portable touchpad keyboard  14 .  
         [0046]    [0046]FIG. 3 is a perspective view of the physical support assembly  10  without being attached to the portable touchpad keyboard  14 . This view show the three separate leg assemblies,  16 ,  18  and  28  more clearly. The first support leg assembly  16  is presently made of plastic, and so that the channel  32  can easily be formed on the side that is opposite to this view. The second support leg assembly  18  is a thin piece of metal that is bent to form its present shape, wherein the ends are disposed into the pivoting axis  24 . The second support leg assembly  18  is slightly smaller than the channel  32  so that it fits in easily. Finally, the third support leg assembly  28  is also a thin piece of metal that has been bent to its present shape, wherein the ends are disposed into the pivoting axis  36 . Note that the third support leg assembly  28  does not fold over so as to fit within the channel  32  on the opposite side of the first support leg assembly  16 . It is always extended away from the first support leg assembly  16 .  
         [0047]    It should be stated that the materials used in the support leg assemblies  16 ,  18 ,  28  can be modified as long as the function performed by the substitute materials is the same.  
         [0048]    [0048]FIG. 4 is a perspective view similar to that of FIG. 2, with a change being that the physical support assembly  10  has now been folded up against the back side of the portable touchpad keyboard  14 .  
         [0049]    [0049]FIG. 5 is provided as a different perspective view of the physical support assembly  10 , the adapter  12 , and the portable touchpad keyboard  14  shown in FIG. 1.  
         [0050]    [0050]FIG. 6 is a profile view of the physical support assembly  10 , the adapter  12 , the portable touchpad keyboard  14 , and the portable electronic appliance  20 . It should be noted that this view shows that the portable electronic appliance  20  is relatively close to the portable touchpad keyboard  14 . In practice, the third support leg assembly  28  is longer than shown here in order to provide sufficient room for the elements to be combined.  
         [0051]    However, it is also envisioned that in an alternative embodiment, the third support leg assembly  28  is designed to slide along the back side of the portable touchpad keyboard  14 . By sliding, it would be possible to move the physical support assembly  10  further away from the portable touchpad keyboard  14 , and thereby support a longer portable electronic device  20  having a center of gravity that is disposed further up its body.  
         [0052]    [0052]FIG. 7 is a perspective view of the adapter  12  show shows a top and one side thereof. The adapter  12  is made to form an angle that tilts the portable touchpad keyboard  14  towards the portable electronic appliance  20 . In other words, the angle is going to be less than 180 degrees between the portable touchpad keyboard  14  and the portable electronic appliance  20 . This angle enables the combination of the portable touchpad keyboard  14  and the portable electronic appliance  20  to be used in a more convenient manner when a display screen in the portable electronic appliance  20  is tilted towards a user.  
         [0053]    The preferred angle of the adapter  12  is approximately 150 degrees between a first plane formed by a face of the portable touchpad keyboard  14  and a second place formed by a face of the portable electronic appliance  20 . However, the angle formed by the adapter  12  can be modified, and a useful range of operation should be considered to be anything between 90 degrees and 180 degrees as defined above.  
         [0054]    The adapter  12  shown in FIG. 7 includes a portion  40  that slides into a body of the portable touchpad keyboard  14 . Of this portion  40 , electrical contacts  42  are disposed on a printed circuit board  44 . These electrical contacts  42  are in electrical communication with the electrical contacts  46  shown on the opposite end of the adapter  12 . Only enough of these electrical contacts  46  are provided as are used by the portable electronic appliance  20 . This reduces the cost of the adapter  12 . The body of the adapter  12  is molded plastic as is known to those skilled in the art.  
         [0055]    [0055]FIG. 8 is provided as a perspective view of a bottom and side of the adapter  12  shown in FIG. 7. A feature not shown elsewhere is the tab  48  that helps to keep the adapter  12  coupled to the portable touchpad keyboard  14 .  
         [0056]    [0056]FIG. 9 is provided as a perspective view of the adapter  12  coupled to the portable touchpad keyboard  12 .  
         [0057]    [0057]FIG. 10 is a perspective view of the portable touchpad keyboard  14  as seen with the adapter  12  removed therefrom.  
         [0058]    [0058]FIG. 11 is a cut-away profile view of the adapter  12  and an electrical connector housing  50 . This electrical connector housing  50  is disposed within the portable touchpad keyboard  12 , and mates with the electrical contacts  42  of FIGS. 7 and 8. Inside the electrical connector housing  50  are disposed a plurality of electrical connectors  52  in parallel. These electrical connectors  52  are often referred to in the industry as tuning forks because of their shape. One of the tuning forks  52  is shown here in profile. The tuning forks  52  may have a slight inward inclination at the ends of the forks  54  in order to make a good electrical contact. When the tuning forks  52  are disposed in parallel inside the electrical connector housing  50 , it forms what is called a saddle mount.  
         [0059]    When the adapter  12  and the electrical connector housing  50  were developed, industry standard tuning forks  52  were used in the design. The stresses placed on the adapter  12  and the portable touchpad keyboard  14  are often such that the strain is delivered to the electrical connector housing  50 . The tuning forks would bend. Thicker tuning forks  52  were critical to successful operation of the combination.  
         [0060]    It is to be understood that the above-described arrangements are only illustrative of the application of the principles of the present invention. Numerous modifications and alternative arrangements may be devised by those skilled in the art without departing from the spirit and scope of the present invention. The appended claims are intended to cover such modifications and arrangements.