NO873944L - ELECTRICAL CONTACT DEVICE WITH CONTACT PROTECTION. - Google Patents

Description

The invention relates to an electrical contact device with contact protection, in particular for the power supply of mobile telecommunications devices.

In the case of rechargeable power supplies for electrical devices, especially as for example microphones for radio telephones, the connection to the charging device must be covered and protected. The purpose of the invention is to provide a locking device which automatically opens when the microphone is placed on the charger.

According to the invention, this purpose is achieved by the device's one contact pin being fixed in the interior of the device housing behind spring-loaded closing pieces, which, when a protruding counter contact piece is plugged into the power supply device, are first opened automatically and during the further course of the connection, access opens for the subsequent contact course.

Further advantageous embodiments of the invention are shown

in the sub-requirements. In what follows, the invention will be explained in more detail in connection with the examples shown in the drawing. Fig. 1 shows a design example with spring-loaded flaps before the coupling.

Fig. la shows the same after the connection.

Likewise, in the following figures, each figure marked with "a" denotes the contacted state. Fig. 2 shows a design example with displaceable flaps as a cover. Fig. 3 and 4 show flap-shaped covers made of elastic material. Fig. 5 shows an embodiment where an auxiliary pin first opens the flap

fin.

In each of the figures, only partial sections of the two housings for the radio-telephone device 2 and the charging device 5 are shown, as these show the most important individual features for the contacting or coupling.

By fig. 1, a power supply device or a charging device 5 is shown at the top, as this has a protruding, insulated contact plug 4. As usual, this plug can be designed coaxially or also multi-pole. The counterpart on the microphone 2 shows a plug 1 which is hidden and placed behind the flaps 3. This is designed as a male plug. The cover is provided by the flaps 3, which can also be designed as several partial flaps or flaps around the opening for the plug 4. The flaps are hinged to the edge and pre-tensioned by springs so that in the resting state they cover the opening in the wall of the handset 2. Fig. 2 shows a design example where the cover flaps are designed as sliding parts 7. These flaps are wedge-shaped beveled against the connection direction for the plug 4 at the charger and are biased against each other with springs 8 in the housing for the microphone. Appropriately, one flap is provided with a groove against the outer wall of the house to achieve good sealing, as the wedge of the other flap engages with the groove. If the microphone is placed on the charger, the plug 4 presses the tabs 7, 7a against each other, so that the connection path is exposed. Fig. 3 shows an embodiment where the tabs 8 are made of elastically springy elements, e.g. of silicone material. Appropriately, the entire closing part, which consists of several segment-shaped divided tabs, is designed as plugs which can easily be pressed into the corresponding opening on the microphone and held in this opening by means of flange-shaped devices. In the outline A

on fig. 3b shows four circle segments in the closed state. However, another division may also occur.

Fig. 4 shows an embodiment which is particularly suitable for multi-pole plugs. There, the elastic tabs 9 are designed as

Claims (6)

squares. They depend on the allowed width for the plug device, possibly spring-loaded in several places. Finally, fig. 5 a design example where hinge-shaped and spring-loaded flaps with two internal flaps 10 are stored as a flap door. In this design example, the plug itself does not provide the opening, but on the other hand, for the protection of this plug, on the design example shown, two pins 11 arranged on the side are placed which protrude above the plug 4, and which, as they move in front of this, first hit the flaps 10 on the locking device and thereby open the actual flaps. This design constitutes yet another special type of contact protection. PATENT REQUIREMENTS: 1. Electrical contact device with contact protection, especially for the power supply to mobile telecommunications devices, characterized in that the individual contact pin (1) on the device (2) is fixed in the interior of its housing behind spring-loaded closing parts (3), as when connecting a protruding counter-contact piece (4) on the charging device (5) immediately opens automatically and in the further course of the coupling frees access for the subsequent contact course. 2. Contact device according to claim 1, characterized in that the closing parts are designed as hinged flaps, which are held closed by springs (6) in their resting state. 3. Contact device according to claim 1, characterized in that the closing parts are designed as spring-loaded, wedge-shaped elements (7) displaceably stored laterally in the housing (fig. 2). 4. Contact device according to claim 2, characterized in that the flaps are designed as elastically springy flaps (8) which form circular sectors (fig. 3). 5. Contact device according to claim 2, characterized in that the flaps are divided into several elastically springing tabs (9), depending on the type of springing. 6. Contact device according to claim 2, characterized in that contactless pins (10) are arranged around the protruding contact piece (4) on the charger with a greater height than the contact pin (4) and that the flaps and the hinge are provided with another flap (10), so that the flaps first open and frees the way for the contacts by prior contact of the contactless pins (11) against the second flap (10).