Abstract:
An electrical device including a top module having a panel for displaying an image, a bottom module having a plurality of buttons for controlling the operation of the electrical device, a base affixed on the bottom module, a pivot formed on the base having a buckle for buckling the top module which is capable of rotating around the buckle, a stop block for stopping the top module, and a track surrounding the base for allowing the stop block to move along the track.

Description:
BACKGROUND OF INVENTION 
   1. Field of the Invention 
   The present invention relates to an electrical device, and more specifically, to an electrical device that forms a specific angle between a top module and a bottom module as the top module is unfolded. 
   2. Description of the Prior Art 
   With the popularization of convenient mobile phone devices for routine communication among people in the modern information society, people are able to exchange information, sharing experiences and communicating with each other anywhere and anytime. Conventional mobile phones have integrated more and more functions, such as listening to broadcasts, playing games, taking photos, and receiving electronic mail and SMS messages. In other words, mobile phones are not just communication tools but also portable electronic devices with multiple functions. 
   Please refer to  FIG. 1 , which is a diagram of the mobile phone  10  according to prior art. The mobile phone  10  contains a top module  12  having a display panel  11  for displaying images, a bottom module  14  having a plurality of buttons  18  for controlling the operation of the mobile phone  16 , and a connection device  16  for rotatably unfolding the top module  12  and the bottom module  14  by the angle of 180 degrees between the top module  12  and the bottom module  14  as shown in  FIG. 1 . Because the aspect ratio of length to width for images displayed by the display panel  11  in the condition which  FIG. 1  illustrates is 16:9 (or 4:3), that is, the width is narrower, it is desirable to be able to rotate the mobile phone  10  to another orientation so that the aspect ratio of length to width for images displayed by the display panel  11  is 9:16 (or 3:4). It is more suitable for a user to read text, for example electronic mail, in such a display image ratio. It is not ergonomically suitable for a mobile phone to have an included angle of 180 degrees between the top module  12  and the bottom module  14 . For that reason, it is desirable to improve the mobile phone. 
   SUMMARY OF INVENTION 
   It is therefore a primary objective of the claimed invention to provide an electrical device that not only allows the top module to rotate relative to the bottom module around two different axes, but also to set the included angle between the top module and the bottom module to be around 160 degrees to suit the ergonomics of a mobile phone when the top module has been opened. 
   According to the claimed invention, an electrical device comprises a top module having a panel for displaying an image, a bottom module having a plurality of buttons for controlling the operation of the electrical device, a base affixed on the bottom module, a pivot formed on the base having a buckle for buckling the top module which is capable of rotating around the buckle, a stop block for stopping the top module, and a track surrounding the base for allowing the stop block to move along the track. 
   These and other objectives of the present invention will no doubt become obvious to those of ordinary skill in the art after reading the following detailed description of the preferred embodiment that is illustrated in the various figures and drawings. 

   
     BRIEF DESCRIPTION OF DRAWINGS 
       FIG. 1  is a diagram of a mobile phone according to the prior art. 
       FIG. 2  shows a mobile phone according to the present invention. 
       FIG. 3  is a diagram showing the top module of the mobile phone rotated 90 degrees around the axis indicated by the arrow B. 
       FIG. 4  is a structural diagram of the connection device depicted in  FIG. 2 . 
       FIG. 5  is a diagram showing the connection device in  FIG. 4  after moving along the track. 
       FIG. 6  and  FIG. 7  are diagrams showing the top module and the bottom module in relation with the connection device. 
   

   DETAILED DESCRIPTION 
   Please refer to  FIG. 2  and  FIG. 3 .  FIG. 2  shows a mobile phone  50  according to the present invention.  FIG. 3  is a diagram showing the top module  52  of the mobile phone  50  after being rotated 90 degrees around the axis indicated by the arrow B shown in  FIG. 2 . The mobile phone  50  contains a top module  52  having a panel  42  for displaying an image, a bottom module  54  having a plurality of buttons  44  for controlling the operation of the mobile phone  50 , and a connection device  56  for coupling the top module  52  to the bottom module  54 . The included angle between the top module  52  and the bottom module  54  will be 160 degrees after the top module  52  rotates along the arrow A shown in  FIG. 2 . Then, the top module  52  can be rotated 90 degrees around the axis indicated by arrow B to the position shown in  FIG. 3 . As shown in  FIG. 3 , the mobile phone  50  further comprises a pivot protection cover  180  for enclosing the components in the connection device  56  to protect the components from dirt or outside damage and for aesthetic reasons. For simplicity and clarity, the pivot protection cover  180  is only shown in  FIG. 4 . 
   Please refer to  FIGS. 4–7 .  FIG. 4  is a structural diagram of the connection device  56  depicted in  FIG. 2 .  FIG. 5  is a diagram showing the connection device  56  in  FIG. 4  after moving along the track  66 .  FIG. 6  and  FIG. 7  are diagrams showing the top module  52  and the bottom module  54  in relation with the connection device  56 . The connection device  56  contains a base  60  fixed to the bottom module  54 . The base  60  includes a pivot  62  with a first buckle  80  and second buckle  82  both for coupling the top module  52  to the pivot  62 . The top module  52  is able to rotate around the first axis  201  in the direction of arrow A. The pivot  62  includes a track  66  with one end substantially against the base and the other end rising to a height above the base of d. A stop block  68  is shidably installed on the track  66 . One end of a flexible component  70  (e.g., a spring) is connected to the stop block  68 , and the other end of the flexible component  70  is affixed to the rotation member  84  or to the pivot protection cover  180  (illustrated in  FIG. 3 ). One side of the top module  52  is engaged in groove  72  on the stop block  68  while the top module  52  rotates in the direction of arrow A in  FIG. 2 , that is, the included angle between the top module  52  and the bottom module  54  will be 160 degrees (as shown in  FIG. 6 ). As the top module  52  rotates around the second axis  202  in the direction of arrow B, it also rotates the rotation member  84  around the second axis  202  in the dircetion of arrow B, and the stop block  68  connected to the track  66  will slide along the path of the track  66  to the position shown in  FIG. 5  due to the force exerted by the flexible component  70  connected to the rotation member  84 . For clarity, there is no illustration of the flexible component  70  in  FIG. 5 . Because there is a height difference d between the stop block  68  in its position as shown in  FIG. 5  and the stop block  68  in its position as shown in  FIG. 4 , the stop block  68  in  FIG. 5  no longer props up one side of the top module  52 , and therefore, the included angle between the top module  52  and the bottom module  54  is able to be adjusted to 180 degrees (as shown in  FIG. 7 ). 
   Please refer to  FIG. 4  with reference to  FIG. 5 . To return the top module  52  from the condition shown in  FIG. 7  back to the unfolded condition shown in  FIG. 3 , the rotation member  84  will be rotated in the direction opposite arrow B, and the stop block  68  will rotate with the rotation member  84  in the same direction. At the same time, the included angle between the top module  52  and the bottom module  54 , which is 180 degrees, will adjust to 160 degrees as shown in  FIG. 2 . 
   Although this embodiment of the present invention uses mobile phones for the purpose of illustration, the connection device  56  of the present invention is also applicable to other electronic devices such as a notebook computer. 
   Compared to the prior art, the connection device  56  of the present invention sets the included angle between the top module  52  and the bottom module  54  to be 160 degrees when the top module  52  is fully lifted, which is desirable for ergonomic reasons, rather than 180 degrees. In addition, the fully lifted top module can still be rotated to make the included angle between the top module  52  and the bottom module  54  become 180 degrees. In doing so, the user can adjust the included angle between the top module  52  and the bottom module  54  to be 160 degrees for ergonomic reasons when conversing using the mobile phone  50  of the present invention. If the user wishes to take a photo with the mobile phone  50 , the user can adjust the included angle between the top module  52  and the bottom module  54  to be 180 degrees, which conforms to the ergonomics to take a photo more naturally. 
   Those skilled in the art will readily observe that numerous modifications and alterations of the device may be made while retaining the teachings of the invention. Accordingly, the above disclosure should be construed as limited only by the metes and bounds of the appended claims.