Abstract:
A wireless dialing apparatus for mobile phones mainly includes a dialing device anchored on the rim of a car steering wheel by means of a pliable strap and a receiver located in a handfree handset or in a car stereo device to enable the car driver to dial phone numbers conveniently and safely without holding the handset.

Description:
BACKGROUND OF THE INVENTION  
         [0001]    1. Field of the Invention  
           [0002]    The invention relates to a wireless dialing apparatus for mobile phones and particularly a wireless dialing apparatus for car drivers to use without jeopardizing driving safety.  
           [0003]    2. Description of the Prior Art  
           [0004]    With increasing popularity of mobile phones, many peripheral devices of mobile phones have been developed and introduced in the market place. In addition, many laws and regulations have been made and announced that car drivers can use the mobile phones in the car during driving only through handfree handsets. In order to comply with such regulations and to take into account of safety, many peripheral devices for mobile phones also have been developed. Handfree handset is one of the typical examples. However the general handfree handsets provide only simple handfree conversation function, does not offer handfree dialing services. To remedy such a shortcoming, some producers have made improvements as shown in FIG. 1.  
           [0005]    It mainly couples an infrared light dialing device  52  on the steering wheel  51  and provides a handfree handset  53  equipped with an infrared light receiver  531 . However, the infrared light has a small emission angle, and the distance between the infrared light dialing device  52  and the infrared light receiver  531  is short in the car. In the event that the infrared light of the infrared light dialing device  52  does not directly project on the infrared light receiver  531 , the infrared light dialing device  52  cannot function. Moreover, the steering wheel  51  of the car is constantly turned during driving without being set at a stationary position. As a result, the infrared light dialing device  52  often does not directly project on the infrared light receiver  531 .  
           [0006]    Moreover, conventional infrared light dialing devices have very strict emission and receiving positions due to the constraint of the small emission angle. Hence their practical value is greatly reduced. How to overcome the dead angle of the infrared light is an important issue remains to be resolved.  
         SUMMARY OF THE INVENTION  
         [0007]    The primary object of the invention is to provide a wireless dialing apparatus for mobile phones that employs reflection of the infrared light to overcome the restrictions of the positions of the infrared light emission and receiving end, and to effectively resolve the dead angle problem.  
           [0008]    To attain the foregoing object, the invention mainly includes a dialing device and a receiver coupled with a handfree handset or installed in the car stereo device. The dialing device first projects infrared light towards the body of the driver, and the infrared light reflects from the body of the driver and projects onto the receiver. Thus it effectively overcomes the inaccurate projection problem between the infrared light emitter and the receiver.  
           [0009]    The foregoing, as well as additional objects, features and advantages of the invention will be more readily apparent from the following detailed description, which proceeds with reference to the accompanying drawings. 
       
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS  
       [0010]    FIG. 1  is a schematic view of a conventional infrared light handfree handset.  
         [0011]    FIG. 2  is an exploded view of a first embodiment of the invention.  
         [0012]    FIG. 3  is a perspective view of the first embodiment the invention.  
         [0013]    FIG. 4  is a sectional view of the first embodiment of the invention.  
         [0014]    FIG. 5  is a schematic view of the first embodiment of the invention in use.  
         [0015]    FIG. 6  is another schematic view of the first embodiment of the invention in use.  
         [0016]    FIG. 7  is yet another schematic view of the first embodiment of the invention in use.  
         [0017]    [0017]FIG. 8 is a circuit diagram of the invention.  
         [0018]    [0018]FIG. 9 is a perspective view of a second embodiment of the invention.  
         [0019]    [0019]FIG. 10 is a schematic view of a third embodiment of the invention. 
     
    
     DESCRIPTION OF THE PREFERRED EMBODIMENTS  
       [0020]    Refer to FIGS. 2 through 6 for a first embodiment of the invention. The wireless dialing apparatus of the invention mainly includes a dialing device  1  and a receiver  2  coupled with a handfree handset H or the car stereo device R.  
         [0021]    The dialing device  1  has an arched groove  11  to rest on the rim  31  of the car steering wheel  3 , and may be fastened to the rim  31  of the steering wheel  3  by means of a pliable strap  12  which has a hook  121  located on one end thereof to engage with a slot  112  located on the upper rim of the arched groove  11 . The other end of the strap  12  is fastened to the lower rim of the arched groove  11  by means of fasteners  122 . Thus the dialing device  1  may be securely mounted on the car steering wheel  3 . On the arched groove  11 , there is a soft pad  111 . The front side of the dialing device  1  that faces the driver has fast dialing buttons  131 ,  132  and  133 , and infrared light emitters  141  and  142 . The dialing device  1  is controlled by a main control IC S (as shown in FIG. 8) to receive or output commands to function. The dialing device  1  further has a battery chamber  15  and a lid  16  for covering.  
         [0022]    The receiver  2  can receive the infrared light signals emitted from the dialing device  1  and reflected from the driver. The receiver  2  may be included in the handfree handset H or in the car stereo device R.  
         [0023]    As shown in FIGS. 3 through 6, the apparatus of the invention set forth above may be coupled with a mobile phone P when in use. The dialing device  1  may be anchored on the rim  31  of the steering wheel  3  by means of the strap  12  with the hook  121  located on one end of the strap  12  latching on the slot  112  formed on the upper rim of the arched groove  11  of the dialing device  1 . The fast dialing buttons  131 ,  132  and  133 , and the infrared light emitters  141  and  142  face the driver.  
         [0024]    Refer to FIG. 8 for the circuit diagram of the invention. When in use, the driver pushes the fast dialing buttons  131  and  133  to search the required phone number. Once getting the number, the driver pushes another fast dialing button  133  to make confirmation. The dialing device  1  then emits the dialed data through infrared light by means of the infrared light emitters  141  and  142  towards the driver (as shown in FIGS. 5, 6 and  7 ). The infrared light is reflected from the body of the driver to the receiver  2  to accomplish the dialing function.  
         [0025]    Refer to FIG. 9 for a second embodiment of the invention. In order to facilitate dialing operation for the users, the dialing device  1  may have at least one function key  17  located on a lower side thereof for presetting desired functions or enabling users to set the functions desired.  
         [0026]    Refer to FIG. 10 for a third embodiment of the invention. The dialing device  1  may also include a number keypad  18  to allow users to directly enter phone numbers. The number keypad  18  may include numerals  0 - 9  and notations * and # and the like.  
         [0027]    By means of the construction set forth above, the invention can effectively resolve the problems of angle restriction related to infrared light emission and receiving, and the dead angle that occur to the conventional infrared light dialing apparatus.  
         [0028]    While the preferred embodiments of the invention have been set forth for the purpose of disclosure, modifications of the disclosed embodiments of the invention as well as other embodiment thereof may occur to those skilled in the art. Accordingly, the appended claims are intended to cover all embodiments which do not depart from the spirit and scope of the invention.