Abstract:
A support mechanism is disclosed notably for a portable telephone, which is formed by transport means and positioning means for transporting the receiver clipped onto a piece of garment or a belt and for putting the receiver in an upright position on a piece of furniture. According to the invention, the transport and positioning means include a clip intended to be affixed by a first fixed end at the top of the back face of the receiver and including a tilting member which pivots around a shaft arranged at the second elastically movable end of the clip.

Description:
FIELD OF THE INVENTION 
     The present invention relates to a support mechanism for a portable radio communication receiver, notably a portable telephone, formed by transport and positioning means for transporting said receiver clipped onto a piece of garment or a belt and for putting the receiver in upright position on a piece of furniture. 
     The invention likewise relates to a radio communication receiver including a support mechanism. 
     The invention is applied, inter alia, to cellular telephones. 
     So far, cellular telephones and other cordless telephones also called mobiles or portable telephones and called device or receiver in the following text have come to a sufficiently small size to be transported by a user, clipped onto a belt or even a piece of garment, or in a pocket. For such a way of transport, however, one has to take care that the device does not come loose too easily. For this purpose, there is generally provided a retaining clip mostly arranged on the back of the device, while this clip is intended to fasten the device to the belt or to the pocket containing it. 
     Another support function of the device consists of putting it on a table in an ergonomic manner, that is to say, in a more or less inclined position rather than horizontal position. In this manner, the display of the device can be read better and it is easier to fetch when one wishes to handle it. 
     Moreover, such a position is advantageous for good transmitting/receiving conditions of the antenna. 
     The invention is put in a context where one wishes to provide the two cited support functions, against a user and on a table. 
     BACKGROUND OF THE INVENTION 
     In the known devices which comprise a mechanism with the two support functions, these two functions are most often differentiated, the mechanism comprising two elements which are clearly separated and the two of them slewed substantially at the same location situated on the upper back part of the device. With regard hereto may be cited U.S. Pat. No. 5,590,860 whose relatively complex mechanism comprises four elements among which the two clearly separated elements cited above referenced  20  and  30  and which substantially have the same length. The element  30  may occupy various angular positions relative to clip  20  which permits of placing the device to which the support mechanism is fixed on a plane in various inclinations of the order of 30 to 40 degrees. This mechanism is complex and thus costly and fragile. The inclinations it provides are closer to the horizontal than to the vertical. 
     It is an object of the invention to provide a support mechanism which is both simple and robust. 
     Another object of the invention is to provide a support mechanism which permits of positioning a portable radio communication receiver on a table in a position that is close to the vertical. 
     SUMMARY OF THE INVENTION 
     For this purpose, the support mechanism described in the opening paragraph is characterized in that said transport and positioning means comprise a clip intended to be fastened by a first fixed end at the top of the back face of said receiver and a tilting member which pivots around a shaft arranged at the second elastically movable end of said clip. 
     The clip of conventional structure like that of the cap of a fountain pen, for example, is suitable for withstanding shocks. 
     An advantageous embodiment of the invention consists of the tilting member which has two end positions, one folded end position in which it is closed in by said clip in view of transport, and a completely unfolded position in which it may serve as a support member on a horizontal plane for the receiver in a position of the receiver close to the vertical. 
     Other relative turning positions between the clip and the tilting member permit of obtaining more inclined and more stable positions of the receiver. 
     Preferably, the relative positioning means of the clip and the member are formed by ridges which co-operate with recesses of complementary form, the ridges and the recesses being provided on and in side faces of the clip and of the opposite member in the proximity of the shaft. 
     According to a preferred embodiment of the invention, the clip is in the form of a fork having two prongs and the tilting member occupies the space situated between the prongs in its folded position in which it is closed in by the clip. 
     Preferably, the clip and the member are made of polyamide such as nylon or rilsan or made of polypropylene and manufactured by hot injection molding. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     These and other aspects of the invention will be apparent from and elucidated with reference to the embodiments described hereinafter. 
     In the drawings: 
     FIGS. 1A and 1B represent in A seen from the back and in B seen from the side a telecommunication receiver including a support mechanism according to the invention, 
     FIG. 2 represents in a perspective view the support mechanism according to the invention in an exploded view, 
     FIGS. 3A and 3B show in a sketch two parts of the mechanism of FIG. 2 where positioning means are provided relating to the clip and to the supporting member, 
     FIG. 4 represents in a perspective cut-away view an embodiment of the invention for fixing the clip to a belt, 
     FIG. 5 represents in a perspective cut-away view an improvement of the clip according to the invention. 
    
    
     DESCRIPTION OF PREFERRED EMBODIMENTS 
     The radio communication receiver represented in FIGS. 1A and 1B which is a portable telephone here denoted device in the following text comprises a main body  1  with an antenna  2  for receiving (or transmitting) radio waves from (to) a transmitter which is not shown. The device also includes a support mechanism  3  which is formed by a clip  4  and a tilting member  5 . The clip  4  is of a known type similar to that of a cap of a fountain pen except for the fact that its width in proportion to that of the device is larger. The clip  4  made of an elastic material is fixed by its upper end  6  to the top of the back face of the receiver. The clip may be fixed for example by means of a screw, or by a possible insertion into a casing of the body  1  provided for this purpose. 
     The second end  7  of the clip  4  which presses against the body  1  in a state of rest is elastically movable and comprises a shaft  8  which passes through one end of the tilting member  5 . The tilting member  5  may pivot around the shaft  8  between a folded position represented in FIG. 1A wherein it coincides with the clip  4  and a completely unfolded position such as represented in dotted lines in FIG.  1 B. The added lengths of the clip  4  and of the member  5  are such that the device is in upright position, FIG. 1B, on a horizontal plane  9  in a direction close to the vertical, there being provided that the device is supported by a lower stop and the second end  18  of the member  5 , while these two segments form a trapezium (not shown) inside which the vertical projection of the center of gravity of the device is found. It will be noted that in this substantially vertical position the device is easy to fetch in the present state and then put it back in the same position on a table. 
     For that matter, it will be noted that because the battery of the device is placed in the lower part, the center of gravity of the device is advantageously situated lower than the shaft  8 . 
     In FIG. 1B are also represented in broken lines other rotational positions of the member  5  around the shaft  8  which make it possible to obtain, for example, inclinations of 75, 52, 41°. 
     In the position of FIG. 1A, the receiver may be clipped in known fashion to a coat pocket or shirt pocket or also to a belt or a swimsuit. 
     A support mechanism for a receiver as shown in FIGS. 1A and 1B is represented in FIG.  2 . 
     The actual clip  4  is formed by a fork having two prongs between which there is a space in the form of an interstice  11  which ends at its upper part in a bell-shaped portion  12 . The tilting member in the form of a tab  5  is designed to fill the space  11  in folded position, except for the bell-shaped portion  12 . 
     Preferably, the clip and the tilting member are made of a thermoplastic resin, of polyamide such as nylon or rilsan or polypropylene which gives them a slight elasticity and a large robustness with their thickness of the order of 2 to 3 mm. Clip and tilting member may be obtained by hot injection molding. 
     The shaft  8  which is coupled to the parts  4  and  5  is preferably made of metal; of steel, for example. At one end it may have a head  13 . For mounting the mechanism, the shaft  8  is driven with a slight force through the free end of the first prong of the clip  4  then through one end of the tilting member  5  and through the end of the other prong of the clip  4  until the head  13  is in contact with the first prong and the other end  14  ends up on the outside of the second prong. The mounting is completed by riveting the end  14  of the shaft, which creates a slight flare of the end  14 . This ensures a slight allowance between the parts  4  and  5  and thwarts the shaft  8  to leave its housing. 
     For obtaining the various positions of the support member represented in FIGS. 1A and 1B, there may be provided that the allowance between the parts  8  and  4 ,  5  on the one hand and the allowance between the parts  4  and  5  on the other is sufficiently small to maintain the device in stable manner with the inclinations that correspond to these positions, the mutual frictional forces between the elements  8 ,  4  and  5  being clearly higher than the weight of the device. However, to mitigate a possible reduction of the frictional forces with time and use, the embodiment of FIGS. 3A and 3B is preferred which represents enlargements of the parts referenced a and b in FIG.  2 . 
     In FIG. 3A the side face  15  of one prong of the clip  4  has surface irregularities  16  which are either recesses or ridges respectively, regularly arranged in a circle around the hole for the shaft  8 . In a manner not shown the member  5  has opposite complementary surface irregularities on its side face after being mounted, that is to say, ridges or recesses which correspond, for example, to 30 degrees of rotation from each other ( 12  surface irregularities around the shaft) for providing as many stable positions for the device. 
     This arrangement may be provided on one side of the tilting member and the prong or, preferably, on two sides. 
     In FIG. 3B is shown a similar arrangement to that of FIG. 3A to ensure a slight locking of the member against the clip in folded position of the member, while this locking may already have been ensured by the device shown in FIG.  3 A. The side face  15  has on or in its upper part a ridge or a recess  17  intended to cooperate with a complementary recess or ridge of the member  5  situated opposite thereto, when the latter fills the space formed by the opening  11 . In the latter position, the movable end of the tilting member referenced  18  in the FIGS. 1A-1B fits in the bell-shaped opening  12  while leaving a small recess. This recess is used for putting a finger or a nail in to catch the end  18  of the member  5  so as to make it pivot around the shaft  8  and place it in one of the positions represented notably in FIG.  1 B. 
     While examining the FIGS. 2 and 3B, it may be noted that the recessed part  12  reveals a substantially circular form. This form may be benefitted from to form a button hole  19  which is represented in FIG.  4 . In this Figure is shown in a broken line the end  18  of the member  5  accommodated in the opening  11  and which has a slightly concave form to fill up the circular form of the recessed part  12 . A button  21  which may be fixed by any known means to a belt (not shown) is provided to be sunken into the recessed part  12  after which the support  22  of the button  21  engages with an extended recess referenced  23  at the top of the opening  11  beyond recessed part  12  so as to catch the button  21  between the clip and the body  1  of the device. 
     It will be noted that the recessed part  12  and the button hole  19  could be separate, the button hole then being placed highest in the clip near the end  6  at which the clip is fastened to the body  1  of the device. 
     Openings such as  12  or  19  locally diminish the width of the prongs of the clip  4  which may render the clip more fragile and at any rate too elastic at this spot. For compensating this fragility, the prongs of the clip may locally be thickened at the spot of the functional recess(es) of the clip  4 , as shown in FIG. 5 where a reinforcement  25  may be noted at the level of the flare  12  of the opening  11 . 
     The invention is not restricted to the example described above. The clip could notably comprise only a single branch in which case the support member would be put beside it in folded position and the recessed part  12  would no longer be necessary.