Abstract:
A communication device ( 1 ) comprising a first part ( 2 ); a second part ( 3 ); coupling means ( 4 ) for coupling the first ( 2 ) and the second part ( 3 ) and allowing a mutual movement about a hinged joint (AA); and a connection point ( 5 ) for an insertable plug. Said point of connection ( 5 ) is arranged to said coupling means ( 4 ) and it substantially coincides with the hinged joint (AA) of the device ( 1 ). Consequently, the external connection will not interfere with the pivoting movement nor will it complicate handling and holding of the device.

Description:
FIELD OF THE INVENTION 
     The present invention relates to telecommunications and especially to a communication device that comprises a first part, a second part, coupling means for coupling the first and the second part while allowing a mutual movement about a hinged joint, and a connection point for an insertable plug. 
     BACKGROUND OF THE INVENTION 
     The trend in telecommunications is towards a collaboration of different media types, e.g. voice, data and video. In consequence, the use and configuration of communication devices is diversifying, and especially a need for a sizeable display increases. A screen is typically a sensitive element and it is therefore preferably arranged on a surface of the device that can be covered when the display is not accessed, e.g. when the device is in a pocket. Even without any sensitive components in the inner surface, a structure with some kind of moving housing is often preferred since it allows smaller design and protects privacy of a discussion when opened. In such solutions, some type of hinging that allows the two parts to be pivoted into open and closed positions is used. 
     The housing of a communication device generally comprises one or more connection points for external releasable connectors, generally in the bottom of the device. For instance, the battery of the device is typically loaded using a charger that is connected to the device by a cable plugged into a connection point. Sometimes the device is also connectable to an external device, e.g. an additional user interface or a computer by a releasable cable. 
     In prior art, connectors for plugs are typically placed inside a hole in the bottom end, top end or in the sides of the device. When the device comprises a two-part structure where the parts are pivotable in relation to each other, a plug in the bottom end and in the lower part of the sides interferes with the pivoting movement. Whenever a moving housing is used, the connector must be placed not to obstruct the movement, or it must be assumed that the plug is always pulled out if it is in the way. Especially in solutions where a relatively large pivoting movement (e.g. with an opening angle of over 180 degrees between the parts) is necessary, placing the connectors in the bottom end or in the sides of the device is impractical or even impossible. Having connectors in the top end of the device is equally impractical since mobile devices are typically very small and light and a cable hanging and twisting in the top end greatly inconveniences the handling and holding of the device. 
     SUMMARY OF THE INVENTION 
     Now a communication device has been invented where the above noted problem of placing the connectors in a device with a moving housing is obviated or at least mitigated. According to the first aspect of the invention the communication device comprises a first part; a second part; coupling means for coupling the first and the second part and allowing a mutual movement about a hinged joint; a connection point for an insertable plug; and is characterised in that said connection point is arranged into said coupling means and the connection point substantially coincides with the hinged joint of the device. 
     In the invented device the connection point is arranged to the axis around which the pivoting movement occurs. The connector is placed at the hinged joint or to the hinged joint. With such an arrangement the connection will not interfere with the pivoting movement nor will it complicate handling and holding of the device. The space needed for connectors and the hinge mechanism inside the device is decreased. Furthermore, the invented solution facilitates an arrangement where separate connectors are placed in the hinged joint and under it. With such an arrangement the different parts in a two-part structure can have independent inputs and outputs through one point of connection. In general, enhanced freedom of design is accomplished. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     For a better understanding of the present invention and in order to show how the same may be carried into effect reference will now be made, by way of example, to the accompanying drawings, in which: 
     FIG. 1 illustrates an embodiment of a mobile communication device according to the invention; 
     FIG. 2 illustrates a more detailed structure of the embodiment of the nvention; 
     FIG. 3 illustrates a second embodiment of the invented solution; 
     FIG. 4 illustrates a third embodiment of the invention; and 
     FIG. 5 illustrates a fourth embodiment of the invention. 
    
    
     DETAILED DESCRIPTION 
     FIG. 1 illustrates an embodiment of a communication device  1  according to the invention. The communication device divides into two structural parts. In the embodiment shown here the first part comprises a main body  2 , which houses most of the electronic circuitry for controlling the device  1  together with a power supply battery. The second part comprises a lid or a flap  3  pivotably coupled to a lower edge region of the body  2 . Means for coupling comprise a hinge  4  arranged so that the lid  3  can be rotated about a hinge axis AA which is preferably perpendicular to the longitudinal axes BB of the lid  3  and CC of the body  2 . 
     As shown in FIG. 1 the hinge  4  comprises an opening dimensioned to enable a plug  6  to be pushed inside the device. The opening is preferably arranged to fasten the plug  6  to its position as long as it is inside the device, and to release the plug  6  when it is pulled out. In FIG. 1 the plug  6  is connected to a cable  7  and provided with a gripping surface  8  to facilitate the plugging. As for the cable, alternative means of connection are possible, for example an external connection unit for using unlicensed low power radio (LPRF) or infrared (IR) frequencies requiring usage of external connection unit plugged into the device. 
     In FIG. 2 a more detailed structure of the invented solution is presented. Through the opening  5  in the hinge  4  the plug  6  extends to a connecting element  9  in the main body  2 . The connecting element  9  is wired with lines  10  to the functional elements E 1 , E 2  in the main body  2  of the device  1 . The connecting element  9  is preferably a solid structure, made of metal or other electrically conductive material, dimensioned to get into contact with the plug  6  when it is plugged into the device. Furthermore, the connecting element  9  preferably allows the plug  6  to be turning with the movement of the moving housing without losing the contact. An example of such structures is a plug  6  with a cylindrical shape and as a connecting element  9  a terminal lug with a cylindrical hole matching with the dimension of the plug  6 . The lug  9  comprises one or more drag surfaces  11  connected to separate lines  10  for supplying one or more separate connections to the device. 
     In FIG. 3 another embodiment of the invented solution is presented. In some devices both of the two parts comprise one or more functional elements of the device. In this embodiment the main body  2  comprises the first connecting element  9  wired with the first lines  10  to the elements E 1 -E 2  in the main body  2  of the device  1 . Furthermore, the lid  3  comprises a second connecting element  12  wired with second lines  13  to the elements E 3 -E 4  in the lid  3 . The lug  9  preferably comprises a first set of drag surfaces  14 , comprising one or more of said drag surfaces, and connected by separate lines  10  to the functional elements E 1 -E 2 , for providing one or more separate connections to the main body  2 , and a second set of drag surfaces  15 , comprising one or more of said drag surfaces, and connected by separate lines  13  to the functional elements E 3 -E 4 , for providing one or more separate connections to the lid  3 . With such an arrangement one point of connection can be used to deliver signals to and from the different parts of the device, here the main body  2  and the lid  3 . 
     In FIG. 4 another embodiment of the invented solution is presented. In this embodiment the hinge  4  acts as a connecting element that extends through the lid  3  to the main body  2 , and is wired with lines  10  to the element E 1  in the main body. When the plug  6  is pushed into the opening, it gets into contact with the hinge and is thus connected with the element E 1 . The presented embodiment allows use of a shorter plug and enhances robustness of the invented structure. 
     The elements E 1 -E 4  shown in FIG. 2 and 3 illustrate different functional elements of the device accessible through a connection point as shown described here. Such an element can be a battery of the device that is connected to an external charger. Such elements can also comprise input and output elements for different user interfaces e.g. a display, a loudspeaker, a keyboard, or a microphone; data input and output elements, control elements etc. 
     For example, in the embodiment shown in FIG. 2 the element E 1  is the battery of the device and the element E 2  is the keyboard driver of the device. Using only one plug the device is thus charged and an external keyboard is connected to the device. 
     In FIG. 5 an embodiment with two points of connection arranged in opposite sides of the device is presented. The hinge that couples the first part and the second part comprises a first end  16  and a second end  17  in the opposite sides of the device along the hinged joint AA. The first end and the second end both comprise an opening for connecting an insertable plug and a connecting element for providing a connection to at least one functional element as described earlier. Depending on the application, the connecting elements can be in the first part or in the second part on in both of them. The presented embodiment facilitates a number of simultaneous connections without complicating the handling and holding of the device. For example the presented arrangement allows charging of the battery through a connection in the other side of the device and signalling using a serial cable through a connection in the opposite side of the device. 
     Although the invention has been shown and described in terms of preferred embodiments, those persons of ordinary skill in the art will recognise modifications to the preferred embodiment may be made without departure from the scope of the invention as claimed below.