DE3401518A1 - Portable radiotelephone - Google Patents

Abstract

The invention relates to a portable radiotelephone designed as a handset with integrated operating elements, characterised in that it comprises three parts which are roughly identical in size and are interconnected by means of two hinges so that they can fold together, thus rendering it very small so that it can be carried, for example, in a jacket pocket. <IMAGE>

Description

Portable radiotelephone

The invention relates to a portable radio telephone according to the preamble of claim 1.

Such a radio telephone is in the idea, the magazine for engineers, Issue 12, December 1983, on page 50 as a briefcase phone. The device shown there has the shape of a larger handset in which Control elements are integrated in the middle piece on the inside.

Such a portable radio telephone will be used in a future one cellular radio telephone system anywhere in the world for self-dialing long-distance traffic be reachable, the connection from the portable radio telephone via a local Transmitting / receiving station runs to a transition center, where the connection to the public telephone network is established.

Such a known briefcase phone is heavy in weight and requires a large volume.

The present invention was therefore based on the object of a radio telephone of the above type, which has a lower weight, is of small volume, so that it can be worn, for example, in the shirt pocket, and that at the same time it has the familiar shape of a handset during operation.

The solution takes place with the features specified in claim 1.

The subclaims form optimal configurations of the invention.

The radio telephone according to the invention has the advantage of being light in weight and the small volume, so that it can, for example, in the shirt pocket or can be carried in a skirt pocket. When you receive a call, the folded, cellphone about the size of a cigarette box taken out and unfolded, so that it takes on the form of a handset that is ergonomic to the body. When the hinges resting are formed, the unfolded shape is also quite stable. The breakdown The portable radiotelephone is divided into three parts that are joined by two hinges are connected, is optimal in that in the upper part of the listener with hearing amplifier, in the middle part the control keyboard, for example with transmitter and receiver and in the lower part the microphone and microphone amplifier can be added. the electrical coupling of the three parts takes place optimally via ribbon cable or via Pressure contacts that are pressed against each other when opening, for example in the form of resilient plugs and sockets. In the unfolded form is also the Send / resp.

Receiving antenna optimally unfolded so that enough energy is emitted can be. In a further embodiment, the Hook contact of the handset actuated, so that the radio telephone is considered removed. Conversely, the fork contact is correspondingly separated when it is folded up, as a result of which the phone is deemed to have been hung up. Through large-scale integration of the relevant Circuits, for example for parts of the transmitter and the receiver, the complete Hearing amplifier and microphone amplifier, etc., the portable radio telephone can be a whole be kept very small, so that if the individual parts are kept flat, when folded, it only takes up the size of a pack of cigarettes.

The invention is described with reference to the figures.

Figure 1 shows an embodiment of the invention in the unfolded Shape, as well as FIG. 2. Finally, FIG. 3 shows an exemplary embodiment folded up.

In Figure 1, the portable radio telephone is shown in perspective, The perforations for microphone and receiver can be seen in the lower and upper parts are. The middle part is used for manual holding and contains a row of operating keys from here e.g. 6 times 2 buttons.

Figure 2 shows the unfolded phone from the side, dashed lines the transceiver antenna A, the microphone M, the keyboard T and the receiver H can be seen are. It is also used as an electrical connection between the upper and middle part a ribbon cable BK drawn as a tight loop.

Figure 3 shows the folded phone also from the Side, in turn the antenna A, the microphone M, the keyboard T and the handset H are shown in dashed lines. Furthermore, here are the two hinges S, which connect the three parts, drawn. Between the middle and lower part the electrical connection is made by means of pressure contacts, with the middle part Resilient sockets B and resilient plugs St are attached to the lower part.

Of course, the foldable phone is also for the Suitable for use as a "cordless phone".

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Claims (7)

Claims i. Portable radio telephone designed as a handset, with integrated controls, characterized in that it consists of three approximately equal parts, which are connected to each other by means of two hinges are that they are collapsible. 2. Radiotelephone according to claim 1, characterized in that the hinges are latching. 3. Radio telephone according to one of the preceding claims, characterized in that that the middle part a control keyboard and the two outer parts a microphone or have a handset and that the electrical connections between the parts via ribbon cable or via pressure contacts that are actuated when opening. 4. Radio telephone according to one of the preceding claims, characterized in that that a transmitting / receiving antenna is provided which extends over all three parts. 5. Radio telephone according to one of the preceding claims, characterized in that that when folding a hinge a fork contact is actuated, such that the Telephone in the folded state as on-hook and in the unfolded state is considered accepted. 6. Radio telephone according to one of the preceding claims, characterized in that that most of the electrical circuit arrangements, especially for transmitters, Receiver, hearing and microphone amplifier, etc., is integrated on a large scale. 7. Radiotelephone according to claim 6, characterized in that the parts are kept flat, so that the radio telephone in folded form only about the size of a pack of cigarettes.