Abstract:
A portable communication device for multimedia applications including upper and lower parts connected by a joint element for moving the parts relative to each other between closed and various open positions. The upper part includes a display which is on the outside of the closed device. The joint element enables pivoting the upper part along a horizontal axis disposed below the plane of the display in a position that is shifted parallel outward or inward relative to the upper part as well as rotational motion of the parts relative to each other about a rotational axis which is tilted relative to the plane of the display, the motion being made when the rotational axis comes to a position perpendicular to the horizontal axis as a result of the pivoting motion. Optimum display and keypad size for PC use, slimmer design, and additional space for multimedia components are attained.

Description:
BACKGROUND OF THE INVENTION 
     The invention relates to a portable communication device for multimedia applications such as smart phones, cell phones, cell phone PCs or the like. 
     It is known that the housing of a laptop or a notebook consists of two housing parts that are connected together by way of a hinge, such that the two housing parts can be folded closed onto one another and open away from one another, wherein one housing part contains a display or a display unit and the other housing part contains a keypad or an input unit. When the housing is folded open, the two housing parts assume a tilted position relative to one another, and, in fact, when the housing part containing the keypad is lying on a horizontal base, the display is in a position that allows an observer to recognize on the display the characters or commands entered through the keypad. 
     Touch screen technology has led to relatively large displays for communications equipment since all the functions of a standard PC, and not just all the functions of a mobile telephone, are to be executable. On the other hand, the mobile communications equipment worn on the body or in the clothing must be light and small. Moreover, the visual display and the control elements, such as the display and the keys, must be ergonomically designed so that the devices are comfortable to use and so that there are no limitations compared to normal use of notebooks or PC&#39;s. 
     If the desire is to have a cell phone with functions and applications that are common to a standard PC, one would, on one hand, need as much surface area as possible for text input using fingers, and on the other hand, one would need a large display to show the contents of applications. This has led to communications devices such as multimedia cell phones comprising at least two parts, namely a cell phone with touch screen technology and a mini PC with a full QWERTZ-PC keypad (EP 1 887 761 A2, EP 1 862880 A1, EP 1 161 062 A1, DE 196 03 483 C2, EP 932 861 B1, DE 20 2008 017 733 U1). In this case, the cell phone and the mini PC share the display, such that the two parts can either be shifted linearly over one another (EP 1 887 761 A2), can be rotated out to the side about a perpendicular axis (EP 2 234 377 A2), or can be folded open and rotated in the folded-open state by 180° (EP 1 450 545 B1, WO 2006/046084 A1, JP 2001 298 513 A1, DE 103 47 999 B4). 
     The disadvantage of all of these known technical solutions is that the pivot axis for opening the communications device and the rotational axis for rotating the display are disposed above the lower part, resulting in a loss of valuable space for the display. Moreover, the installation of components, such as loudspeakers, microphones or the like, leads to limitation of the available area for the display, which is already small. This makes the known communications devices unwieldy and thick, and makes the operation thereof, particularly in the handling of the mini PC, fragile and laborious. 
     Another disadvantage is that the display is often times not optimally positioned relative to the user when it is opened up, or else the keypads used are not suitable or are poorly suitable for PC use, which quickly leads to fatigue during extended work. 
     Considering this prior art, the object of the invention is to provide a portable communications device, the display and keypad areas of which achieve an optimum size for a PC-type display and for use, and the thickness and weight of which are significantly reduced, while at the same time the handling of the PC part is improved, the range of multimedia applications is expanded, and the safety of the device against impact and blows is increased. 
     This object is achieved by a communications device of the class identified above comprising: a shell-shaped upper part with a frame, the part being provided for holding components of the communication device; the outside of the communication device being designed as a display; a lower part for holding an electronic module, said lower part being made up of at least a keypad, a frame section and a bottom shell; and a joint element for connecting the upper part and the frame section of the lower part, at a longitudinal side of said upper part and said frame section, said joint element permitting a pivoting of the upper part about a horizontal axis from the closed position of said upper part, at which the inside thereof lies on the keypad of the lower part to an open position back to a closed position, and permitting a pivoting of the upper part in the open position about a rotational axis within an angular range of at least 180°, so that in the open position the display faces the keypad or in the closed position is located outside again. 
     The solution according to the invention starts with the realization of pivoting the upper part along a horizontal axis disposed below the plane of the display in a position that is shifted parallel outward or inward relative to the upper part, and of making the rotational motion about a rotational axis that is tilted or bent relative to the plane of the display, the motion being made when the rotational axis comes to a position perpendicular to the horizontal axis as a result of the pivoting motion. This makes it possible to achieve an optimum display and keypad size for PC use and to achieve a lower design height of the communication device, while at the same time creating space for further multimedia components such as DVBT-TV, Internet radio, USB connections, and/or camera applications and game control buttons. 
     The invention is characterized in that the joint element is pivotably disposed in bearings disposed at a bottom side of the frame section, wherein the horizontal axis of the joint element lies in a position along the periphery of the lower part, the position being shifted parallel outward or inward relative to the frame of the upper part, and in that a pivot pin is provided that is disposed at the frame and protrudes in the direction of the lower part, and is tilted 90° relative to the display. 
     In a preferred embodiment variant of the communication device according to the invention, the frame of the upper part comprises an incline designed from inside to outside, at least near the joint element, wherein a pivot pin is placed without play and rotatably disposed in a pin seat provided in the joint element, and wherein protrusions are provided at the joint element, stops being provided for the protrusions at the recess of the frame section of the lower part, the stops limiting the pivoting motion to a first open position where the frame of the upper part can rotate about the pivot pin until another protrusion provided at the joint element engages in one of the respective depressions provided in the incline for purposes of limiting the rotational motion, wherein after the completion of the rotational motion the display comes to lie in a second open position in which the keypad and the display assume a working position relative to one another. 
     The pivot pin can be solid or hollow, without leaving the spirit of the invention. 
     In a preferred embodiment of the communications device according to the invention, the tilt angle of the pivot pin relative to the plane of the display is up to 90°, preferably 45°. This means that the upper part reaches the first open position at opening angles of preferably between 45° to 65° in interplay with the protrusions and stops present at the joint element, wherein the incline is adjusted to the tilt of the pivot pin. 
     After reaching the first open position, the tilted rotational axis of the pivot pin comes to a position that is perpendicular to the pivot axis, such that it is possible to rotate or turn the upper part comprising the display by 180°. The upper part and the display then assume a second open position at which the opening angle is between preferably 135° and 180°. 
     A particular advantage is that the frame of the upper part comprises a peripheral edge that, in turn, encloses the outside of a peripheral protrusion formed on the frame section of the lower part, such that the communication device is enclosed in a form-fitted manner for the protection thereof in the closed position. This makes the communication device less sensitive to impacts or blows since the forces are introduced to a closed frame and can thus distribute without affecting the sensitive display. 
     According to another preferred embodiment of the communication device according to the invention, the joint element is designed eccentrically and comprises cogged ends, wherein the joint element comprises at least a main body and a bearing part. These are fastened together by way of screw connections and form a holding space for a permanent magnet, an entry space for a flexible cable, and the pin seat with an annular chamber, which communicates with the entry space, the annular chamber allowing the routing of the flexible cable, wherein cylindrical shaft ends for rotatably holding bearings designed at the bottom side of the frame section are formed at the cogged ends of the joint element in alignment with the pivot axis. 
     Suitable metals for the joint element include light metal alloys such as Al—Mg alloys or even steel, so that sufficient strength is achieved in the smallest possible space. 
     In another preferred embodiment of the communication device according to the invention, the flexible cable electrically connects the electronic equipment in the lower part with the electronic equipment in the upper part by way of the entry space in the joint element, through the annular chamber and the pivot pin seat, in a plurality of spiral windings of the pivot pin, such that data can be exchanged between the electronic equipment. 
     Another advantage for a compact but thin design of the communication device according to the invention is that the protrusion for limiting the rotational motion from the first open position to the second open position is disposed at a cogged end of the joint element directly next to the holding space for the permanent magnet approximately perpendicular above the shaft end, wherein each of the protrusions for limiting the pivoting motion to the first open position is disposed parallel in alignment to the pivot axis at the side of the cogged ends of the joint element facing away from the shaft. 
     Moreover, the bearing part that is inserted into the main body of the joint element has a guide notch, which aligns with the protrusions and/or the pivot axis of the joint element, and which holds a multiply bent spring clamp, which can exert a spring force on the frame of the upper part as soon as the spring ends of the spring clamp are supported by tension at the contact points thereof at the brackets, whereupon the upper part and the display thereof can be brought to a third open position, the opening angle of the third open position preferably being up to 30°. 
     Furthermore, it is particularly advantageous that a holding space for a permanent magnet is disposed in the incline of the frame associated with the joint element, and the holding space, when in the second open position, is disposed such that the permanent magnets in the joint element and in the incline lie along a common vertical axis relative to one another, such that the magnets each fix the rotational motion with the N-S alignments thereof being lined up together. 
     Another preferred embodiment variant of the communication device according to the invention provides that the pivot pin is in operative connection with a compression spring fixed at one end in a blind hole of the pivot pin and at the other end at the main body in such a way that the restoring force of the spring supports or automatically executes the rotational motion to the second open position after the first open position has been reached. 
     In another preferred embodiment of the communication device according to the invention, the bearings for holding the shaft ends are disposed opposite one another in alignment with the horizontal axis of the joint element at the recess and are formed from a bearing half-shell formed in the bottom side of the frame section and from a bracket, each formed bearing half-shell of said bearings comprising a rear stop which prevents an axial shifting of the shaft ends. Another bearing half-shell is formed in the bracket, wherein the bracket is fastened to the bearing half-shell formed in the bottom side of the frame section by way of screws such that the bearing half-shells lie one atop the other and form the bearing. For a low friction, low wear bearing, the bearing half-shells are made of plastic. 
     In a preferred further embodiment of the communication device according to the invention, the frames of the upper part and the pivot pin are made of metal or plastic, and the frame section and the bottom shell of the lower part are made of plastic, wherein the pivot pin is either substance-bonded or form-fitted to the frame of the upper part. For the case in which the frame is made of plastic, the pivot pin can be made cheaply in an injection molding process. 
     As another advantage for a space-saving design of the communication device according to the invention, the components of the communication device, such as a loudspeaker, microphone and/or camera, are disposed in the lower part, wherein the loudspeaker is disposed in a depression formed in the bottom side of the frame section of the lower part, and the sound direction of the loudspeaker faces the display, wherein a first sound outlet opening, which is disposed at the outer back side edge of the frame section in the direction of the display, and a second sound outlet opening cut out at the upper edge of the base part are provided for the loudspeaker. 
     In another advantageous embodiment of the communication device according to the invention, a loudspeaker for listening and another loudspeaker for ringing are provided, wherein the loudspeaker for listening is connected to the sound outlet opening through a closed channel, and the loudspeaker for ringing is connected to a different sound outlet opening. 
     It is further advantageous that at least two microphones can be provided for suppressing secondary noises when making voice recordings. 
     A special embodiment of the communications device according to the invention provides, as a camera, a camera module, which comprises a digital camera with a flash device, and which is optionally removable from the bottom shell of the lower part. 
     It is also advantageous that the keypad lie on the frame section of the lower part and can be replaced from the outside, the keypad being designed as a mechanical keypad with a touchscreen function, wherein the keys of the keypad are arranged in a matrix of 5×11 fields, the cursor key takes up four fields and the space key takes up two fields so that a total of 51 keys are available, and the ESC, Tab, small type/capitals switch and CTRL keys are arranged vertically in the first column of the matrix, wherein these keys are available directly and with full value. 
     In another embodiment variant of the communications device according to the invention, the upper part comprises a switch button for multimedia applications (cell phone, smart phone) above the lower end thereof, and a switch button for the electronic module. At a longitudinal side of the frame opposite the joint element, two multimedia buttons are provided on the display, the functions of which can be shown on the display depending on the need and on the application. On both longitudinal sides, the frame section and the bottom shell have recesses for holding buttons, such as gaming buttons, push-to-talk buttons or the like. 
     Other advantages and details are found in the following description, with reference to the attached drawings. 
     EXEMPLARY EMBODIMENT 
     The invention is explained in further detail below with the aid of an exemplary embodiment. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1 , a perspective representation of the communication device according to the invention in the folded open state for PC application; 
         FIG. 2 , a frontal view of the communication device according to the invention in the folded closed state for cell phone and camera application; 
         FIG. 3 , a top view of the upper part without the display; 
         FIG. 4 , a section along line G-G in  FIG. 3 ; 
         FIG. 5 , an exploded representation of the lower part; 
         FIG. 6 , a top view of the frame section of the lower part; 
         FIG. 7 , a view of the back side of the frame section; 
         FIG. 8 , a front view of the joint element; 
         FIG. 9 , a perspective front view of the joint element; 
         FIGS. 10 a  and 10 b   , views of the bearing part; 
         FIG. 11 , a section of the pivot pin placed in the bearing seat of the joint element; 
         FIGS. 12 a  to 12 c   , the back side of the upper part; 
         FIG. 12 d    shows brackets for attachment to the joint element; 
         FIG. 13 , a partial section along line A-A in  FIG. 2 , wherein the upper part and the lower part are in the closed position; 
         FIG. 14 , a partial view along line A-A in  FIG. 2 , wherein the upper part and display are tilted about the horizontal pivot axis to the first open position, and the tilt angle of the pivot pin aligns with the vertical rotational axis so that 180° rotation is possible; 
         FIG. 15 , a partial section along line A-A in  FIG. 2 , wherein the upper part and the display are rotated about the rotational axis by 180°, and the second open position has been reached; 
         FIG. 16 , a partial section along line A-A in  FIG. 2 , wherein the upper part featuring the display is tilted from the second open position to the third open position; 
         FIG. 17 , a perspective representation of the communication device according to the invention according to  FIG. 6 ; 
         FIG. 18 , a perspective representation of the flexible cable connection between the upper and the lower part; 
         FIG. 19 , a partial section along line E-E in  FIG. 2 ; 
         FIG. 20 , a partial section along line F-F in  FIG. 2 ; 
         FIG. 21 , a top view of the keypad in a 5×11 matrix; 
         FIG. 22 , a view of the back side of the communications device according to the invention having a camera; 
         FIG. 23 , a sectional representation of the touch pen chamber with attached internal antenna; and 
         FIG. 24 , a representation of the touch pen as a telescopic antenna. 
     
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
       FIGS. 1 and 2  show an example of a communication device according to the invention that substantially comprises a shell-shaped upper part  1  that holds a cell phone  2  with a full display  3 , a lower part  6  that holds an electronic module  4  (see  FIG. 7 ) with a keypad  5 , and a joint element  7  that connects the upper part  1  and the lower part  6 , said joint element being fastened to a longitudinal side L of the upper and the lower part  1  and  6 . The upper and lower parts  1  and  6  are designed to be folded together toward one another and opened apart away from one another by way of a horizontal pivot axis Y-Y that extends through the joint element  7 , the parts also able to rotate about a vertical rotational axis X-X. 
     The upper part  1  has a frame  8  that is formed as a peripheral edge  9  that is rounded upward. Placed in the frame  8  is a base  10  that is held thereon in a form-fitted manner, such that the edge  9  and frame form a depression  11  for the purpose of holding the display  3 . 
     Above the lower end STU of the upper part  1  are switch buttons  12  and  13 , which are for operating a multimedia application, such as a cell phone or smart phone, and the electronic module  4 . 
     The frame  8  and the base  10  form an edge  14  at the bottom side US of the upper part  1 , the edge protruding peripherally downward and being interrupted by an outwardly-extending incline  15  at the longitudinal side LS associated with the joint element  7 . 
     A pivot pin  16  extends from the incline  15  in the center of the longitudinal side L in the direction of the lower part  6 . The tilt angle α and that of the pivot pin  16  relative to vertical can be up to 90°, preferably 45° (see  FIGS. 3 and 4 ). The tilt angle of the incline  15  is matched to the tilt angle of the pivot pin  16 . 
     The upper part  1  with pivot pin  16  is preferred to be made of metal, for example a light metal alloy such as AlMg, or is made of steel. However, it can also be made of impact-resistant plastic. 
     In the case where the pivot pin  16  is made of metal, it is connected to the frame  8  in form-fitted fashion. If the upper part  1  and the pivot pin  16  are made of plastic, the frame  8  and the pivot pin  16  can be bonded into one material piece through a molding-on process. 
     The lower part  6  substantially comprises the electronic module  4 , the keypad  5 , a frame section  17 , a bottom shell  18  and a cover, which is not shown. The frame section  17  and the bottom shell  18  are made of plastic and are held together by way of screwed connections (see  FIG. 5 ). 
     The frame section  17 , as shown in  FIG. 6 , has a peripheral protrusion  19  on the upper surface OSR thereof; the protrusion bordering a support surface  20  for receiving the keypad  5 . 
     A recess  21  is made in the frame section  17  and the bottom shell  18  on the longitudinal side L associated with the joint element  7 , the size of said recess being tailored to the dimensions of the joint element  7 . 
     The width and length of the peripheral protrusion  19  is matched with the partially bordering edge  14  on the upper part  1 , such that the edge  14  can encompass the protrusion  19  in the closed position, so that the keypad  5  with the electronic module  4  is protected against impacts and blows. The longitudinal side L of the frame section  17  has an incline AS that corresponds with the angular position of the incline  15  of the frame  8 . 
     As illustrated in  FIG. 7 , on the bottom side USR of the frame section  17 , the recess  21  is bordered by a raised bordering and reinforcing wall  22 , wherein stops  23  with films for damping the impact energy during blows are disposed at the wall area associated with the longitudinal side LSA of the recess  21 , each of said stops being in vertical alignment with the lateral side QS of recess  21 . Directly at the periphery of the frame section  17  are two bearing half-shells  24 ,  25  of a bearing on each lateral side QS of the recess  21 , the half-shells facing one another in alignment with the pivot axis Y-Y and formed into the bottom side USR of the frame section  17 . Each of the bearing half-shells  24  and  25  is provided with a stop  26 . It is helpful for these stops  26  to be made of metal and be screwed into the bottom side USR of the frame section  17  (see  FIG. 4 ). The frame section  17 , moreover, has a collar B running along the outer periphery thereof, the collar being matched with the collar BS protruding up from the bottom shell  18 . 
       FIGS. 8 through 10   a  and  10   b  show the joint element  7 , which is designed eccentrically, and which comprises a main body  27  and a bearing part  28 . 
     The main body  27  is able to rotate about an off-centered longitudinal axis by way of shaft ends  29  and  30 , which are formed at the cogged ends  31  and  32  of the main body  27 . 
     The cogged ends  31  and  32  have protrusions  33  and  34 , which face stops  23 , which are at the recess  21  on frame section  17  of the lower part  6 , in the direction of the joint element  7 , which is installed on the frame  8  of the upper part  1 . 
     The bearing part  28  has an incorporated guide notch  35 , which is aligned with the protrusions  33  and  34  parallel to recess  21 , the notch serving to hold and act as a counterbearing to a spring clamp  36  (see  FIG. 10 ), the function of which will be detailed in section (0059). 
     The bearing part  28  and the main body  27  are fastened together through screwed connections  37 , and form a holding space  38  for a permanent magnet  39 , an entry space  40  for a flexible cable  41 , and a pin seat  42  for the pivot pin  16 , wherein an annular chamber  43  is formed in the pin seat  42 , the chamber being connected to the entry space  40  so that the flexible cable  41  can be led through (see  FIG. 8 through 10 ). 
     The main body  27  and the bearing part  28  are matched such that the pin seat  42  is divided into two equally sized halves, so that when the bearing part  28  is placed into the main body  27 , the pin seat  42  forms. 
     The pivot pin  16  (see  FIG. 11 ) has a collar  44  formed at the base thereof for secure guiding into the pin seat  42 , the diameter of the collar being matched to the entry-side diameter in the pin seat  42 . At the head, the pivot pin  16  has a peripheral groove  45  into which a half-washer  46  formed in the main body  27  and the bearing part  28  can engage, such that the pivot pin  16  is secured against vertical forces in the installed state. 
     This comes with the extraordinary advantage that during installation, the main body  27  is easily mounted on the pivot pin  16 , and, after placing and fastening the bearing part  28  on the main body  27 , the pivot pin  16  is safely seated in the pin seat  42  in a form-fitted manner without play. 
     There is a blind hole  47  located on the back end of the pivot pin  16  into which is placed a compression spring  48 , one end of which dampens the rotational motion of the pivot pin. The other end of the compression spring  48  sits fixed against the main body  27 . 
     The main body  27  and bearing part  28  are made of metal, preferably a light metal alloy such as AlMg. 
       FIGS. 12 a  to 12 c    show the back side of the upper part  1  in top views and a side view. The pivot axis Y-Y of the joint element  7  runs in a plane which is shifted outward parallel relative to the upper part  1  (display  3 ) and substantially below the upper part  1 , the plane positioned at the bottom side USR of the frame section  17 , coinciding with or coming to cover the bearing half-shells  24  and  25  of two bearings  49  and  50  for holding shaft ends  29  and  30  of the joint element  7 , said half-shells being formed in the bottom side USR. 
     The shaft ends  29  and  30 , which lie in the bearing half-shells  24  and  25 , are secured by way of brackets  51  and  52 . Corresponding bearing half-shells  53  and  54  are formed in the brackets  51  and  52 , the dimensions of said half-shells corresponding with bearing half-shells  24  and  25 . Brackets  51  and  52  are fastened to the bottom side USR of frame section  17  using screws  78  (see  FIG. 12 d   ). 
     Stops  26 , previously described herein, prevent horizontal shifting of the shaft ends  29  and  30 . 
     Brackets  51  and  52  are made of plastics and thereby provide for a low-wear and low-friction mounting of the shaft ends  29  and  30  in bearings  49  and  50 . 
     The functioning of the opening and closing processes will now be described with reference to  FIGS. 13 to 19 . 
       FIG. 13  shows the communication device according to the invention in the closed position. The upper part  1  and the display  3  located on the outside thereof lie on top of and cover keypad  5 . The pivot pin  16  is located in the pin seat  42  in the joint element  7  and has a tilted position relative to the upper part  1  and the display  3 , wherein the pivot axis X-X of the pivot pin  14  is deflected from the tilt axis Z-Z thereof. This makes rotation of the pivot pin  16  about rotational axis X-X in the closed position impossible. The tilt angle α of the pivot pin  16  can assume values of up to 90°. 
     In  FIG. 14 , the upper part  1  has reached the first open position relative to the lower part  6  after the tilt axis Z-Z has been brought in alignment with the perpendicular rotational axis X-X by pivoting about pivot axis Y-Y by an angle β of about 65° to 45°. Protrusions  33  and  34  reach stops  23  at recess  21  at frame section  17  of lower part  6  (see  FIG. 4  as well). The upper part  1  and the display  3  thereof are now ready for a rotation of 180° about rotational axis X-X so that display  3  comes to a tilt angle γ of 135° to 180°, relative to keypad  5 . This position corresponds to the second open position and is shown in  FIG. 15 . 
     To limit the rotation or turn of the upper part  1  and the display  3  about rotational axis X-X to 180°, the main body  27  is provided with a protrusion  55  that is located right next to holding space  38  for permanent magnet  39  and that is approximately perpendicular above rotational axis Y-Y near the cogged end  31  of joint element  7 . Two depressions  56  are associated with this protrusion  55  in incline  15 , the depressions providing a stop after a rotation of 180°, respectively, has been made. Moreover, a permanent magnet  57  is placed into the incline  15  right next to one of the depressions  55  in a seat  77 , the magnet cooperating with permanent magnet  39  of joint element  7  in such a way that the permanent magnets  39  and  57  lie along a common axis, wherein each of the magnets exerts a fixing force onto the rotational motion in the N-S direction thereof toward the other magnet, respectively (see  FIG. 4  as well). 
     To describe the third open position, reference is made to  FIGS. 16 and 17 , in which joint element  7  is shown in exploded representation and spring clamp  36  is also shown. 
     Spring clamp  36  lies in the middle of the guide groove  35  of bearing part  28  and is supported in the groove  35  near the point of maximum extension of the clamp. The ends  58  and  59  of spring clamp  36  lie directly against the stops  23  and are held in position by brackets  51  and  52  (see  FIG. 17 ), such that spring clamp  36  can exert a spring force on joint element  7  and upper part  1 , the force helping the user bring the joint element  7  and the upper part  1 , including display  3 , from the second open position to an angle δ of up to 30°, which is optimum for the user, whereby the upper part can be tilted toward the user about pivot axis Y-Y until rotational axis X-X reaches folding axis V-V. 
     This is illustrated by  FIG. 16  in connection with  FIG. 17 . 
     To close the upper part  1  and display  3 , which are in the working position in the third open position, upper part  1  is pushed back to the second open position by the user through a pivot motion about pivot axis Y-Y against the pressure force that is applied by spring clamp  36 . The upper part then reaches the angular position for making the rotational motion about rotational axis X-X; in other words, tilt angle γ of pivot pin  16  and rotational axis X-X coincide and are positioned perpendicular on pivot axis Y-Y. 
     The user effects the rotational motion of upper part  1  by 180°, wherein display  3 , in turn, becomes the outside of upper part  1  and thereby reaches the first open position in which upper part  1  can be closed to its closed position. 
     Shown in  FIG. 18  in connection with  FIGS. 8 and 9  is the electrical connection between the electronic components in upper part  1  and lower part  6 . The flexible cable  41  runs from the keypad  5  in the lower part  6  to the entry space  40  of joint element  7 , from there through the annular chamber  43  and the pin seat  42  in a plurality of loops around the pivot pin  16  to the electronic equipment in upper part  1 . The plurality of loops guarantee that the flexible cable  41  is mechanically stressed only to a minimal extent. 
     To make the available area for display  3  optimally useful, the components of the communication device, such as the loudspeakers  60  and  61 , microphones (not shown) and/or a camera  62  (see  FIG. 22  as well), are kept inside the bottom shell  18  in bottom part  6 . 
     As shown in  FIG. 19 , loudspeaker  60  is disposed in a depression  63  formed in the bottom side USR of frame section  17  and the sound direction is directed toward display  3 , wherein a first sound outlet opening  64 , which is situated in the direction of display  5  and located at the outer back edge of frame section  17 , and a second sound outlet opening  65 , which is cut out at the upper edge of bottom shell  18 , are associated with loudspeaker  60 . 
     An alternative to this is shown in  FIG. 20 , in which one loudspeaker  60  for listening and a second loudspeaker  61  for ringing are provided. For this purpose, loudspeaker  60  for listening is connected to sound outlet opening  64   a  by way of a closed channel  66 , and loudspeaker  61  for ringing is connected to sound outlet opening  65   b.    
     Shown in  FIG. 21  is an example of an embodiment of keypad  5 . Keypad  5  can be exchanged such that the communication device according to the invention can be equipped with a corresponding keypad  5  for any language in the world, whereby typing proficiency, which had been learned for a particular language, remains the same. 
     The keys in keypad  5  are arranged in a matrix of 5×11 fields, wherein the cursor key  67  takes up four fields and the space key  68  takes up two fields, so that a total of 51 keys are available. In the first column of the matrix, the ESC, the tab, small type/capitals switch and CTRL keys are arranged vertically. Keypad  5 , then, has the dimensions of 50 mm×121 mm. 
     Camera  62  is kept in the bottom shell  18  of lower part  6 , the camera consisting of a digital camera  69  and a flash device  70 . This camera  62  is designed such that it can be removed from bottom shell  18  (see  FIG. 22 ). 
     Moreover, display  3  comprises two multimedia buttons  71 ,  72  at a longitudinal side L opposite joint element  7 , and the function of the buttons that can be shown on display  3  depends on the need and the application. Recesses  73  are made in the longitudinal sides L of frame section  17  and bottom shell  18  in order to hold other buttons, such as buttons for games (see  FIG. 5, 17  also). 
     To provide better informational capacity of the communication device according to the invention, a touch pen chamber  74  for holding a touch pen  75  is located in bottom shell  18 , wherein the touch pen chamber  74  is provided with an attached or vapor-deposited internal antenna  76  for receiving radio and/or DVBT television by way of a TV receiver part kept in the bottom shell (see  FIG. 23 ). 
     Alternatively, the touch pen  75  can also be designed as an antenna, wherein the latter can be designed to be telescopic (see  FIG. 24 ). 
     The advantages of the communication device according to the invention are that: 
     because by moving the horizontal pivot axis in a position, which is shifted parallel outward or inward relative to the upper part and which is below the plane of the display, and because the inclined position of the pivot pin, the display area of the display and the keypad area are enlarged, a smaller design height can be achieved for the upper and the lower parts; 
     the visual angle can be optimized relative to the display without the need for adjustment; 
     a compact design is possible in which the components, such as loudspeakers, camera, microphones, or receiver part for radio and television, are kept in the base part, which saves space; and 
     optimum protection of the communication device against impact and blows can be guaranteed by way of form-fitted overlapping of the lower part by the upper part.