FI64478C - MED ETT KOPPLINGSORGAN FOERSEDD SAEKRINGSSOCKEL FOER SMAELTSAEKRINGAR - Google Patents

Description

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Federal Republic of Germany-Förbundsrepubliken Tyskland (DE) P 2618360.8 (71) Lindner (knbH, Lichtenhaidestrasse 15, 86 Bamberg, Federal Republic of Germany-Förbundsrepubliken iyskland (DE) (72) Hans-Joachim Lindner, Bamberg, Federal Federal Republic of Germany ) (7 * 0 Oy Kolaten Ab (5 * 0 Fuse holder with switch for oulaks -

Med ett kopplingsorgan försedd säkringssockel för smältsäkringar

The invention relates to a fuse box for fuses with end contact shields, the upper end contact dome of which is held in the receiving device and which can be brought into contact position by screwing the receiving device to the threaded sleeve connected to the power supply. connected bottom contact.

Such fuseholders use a switch before replacing a defective fuse to ensure that there is no dangerous voltage at the contacts when replacing. Disconnection also occurs if minor repairs are made to the electrical installation, in which case, in order to increase safety, in most cases the undamaged fuse is screwed back somewhat by its receiver or taken out completely.

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Since the manual operating handle of this switch has a shoulder covering the fuse receiving device in the engaged position, the switch must be moved to its open position to take out the fuse. Thus, it is necessary to perform the disconnection first in order for the exchange to be performed. However, this is not the case when replacing the fuse. In addition, since fuses are mainly replaced by lay people, there is an additional risk that the fuse will only be placed so far that the contact just takes place. After the connection, due to the lack of contact between the fuse and the ground contact, the screw-core of the receiving device can cause heating, oxidation, increase of the cross-resistance and similar phenomena, which affect the operation of the fuse box and in extreme cases lead to destruction. When the fuse is partially off, eg only disconnected, the switch can be reconnected incorrectly, eg by an outsider, so that the electrical device that was originally disconnected, eg for repair, is energized again (DE 23 23 595).

In addition, switchable fuse housings are known in which a cylindrical fuse is inserted into a pivotable inner part having receiving switches by means of a holder with an operating handle, whereby the end position of the pivoting area forms a fixed, disconnecting position. To insert and replace the fuse, place the inner part in such a position that the contact opens. This non-contact position ends again when the inner part is brought to the opposite position. The turning movement in these devices is independent of the contact pressure of the receiving switches. Also, when the contact force of the tongue-shaped receiving switches decreases, e.g. due to fatigue or distortion of the material, the coupling is not inhibited (FR patent publication 21 91 234).

In addition, a switchable fuse box is known in which the reconnection movement of the operating handle is prevented after an overcurrent discharge of the fuse formed therein as a force sensor or in the absence of a fuse.

However, such a blockage does not occur if there is not sufficient contact pressure between the fuse and its switches and thus there is the above-mentioned hazards of overheating (FR application 22 44 253).

The object of the invention is to provide a fuse housing with the features according to the type definition of claim 1 with greater operational reliability, so that reconnection of the switch in the disengaged position is possible only if the contact pressure in the fuse housing is sufficient.

64478 This object is solved by the features of claim 1.

According to another feature of the invention, the closing device acts together with the membrane which gives an acoustic signal.

By means of the invention, it is ensured by simple means that only by means of the complete screwing of the receiving device and thus by means of a contact pressure sufficient for safe use between the fuse and its mating contacts, the effect of the blocking device is canceled. The interaction of the blocking device with the membrane produces an acoustic signal, by means of which the user is informed when the effect of the blocking device is canceled and when the necessary contact pressure is reached when adjusting the fuse, so that the switch can be operated according to the desired operating mode.

An embodiment of the invention is shown in the drawing and will be explained in more detail below.

Figure 1 shows a section of a fuse box with a switch with the fuse fitted in the switching position.

Fig. 2 shows a section of the safety housing with a switch according to Fig. 1, but without a fuse and the retaining device in the disengaged position.

The fuse box consists of two identical housing halves 1, in which case the front housing halves are not shown, which halves are connected to each other by rivets 2. To connect the input and output cable, the ground contact 4 and the threaded sleeve 5 have clamps 3,3 ', respectively. The current supply via the mains contact 4 can be switched off by a switch 6, e.g. to replace a faulty fuse. When the retaining device 7 of the fuse 8 is unscrewed, the bottom contact 4 moves upwards to the abutment surface 10 under the action of the pressure spring 9. Thus, the bracket 11 mounted on the bottom contact 4 pivots outwards so far that the end 13 acting to lock the coupling flap 12 will be inside the pivot radius of the locking cam 14 located on the coupling flap 12. Switch 6 can thus no longer be switched on. Only by screwing in the retaining device 7 with the fuse 8, whereby the fuse 8 is held in the retaining device 7 by the retaining spring 18, is the bottom contact 4 pressed down by the lower contact dome 15 of the fuse 8 so that the bracket 11 moves inwards and its end 13 is again outside the pivot area 14. Switch 6 can now be connected. Fuse box regular

Claims (2)

Sufficient contact medium between the end contact domes 13, 16 and their contact response surfaces is very important for use. In order for the user to be able to detect that this operating state has been achieved, an acoustic signal is generated by means of the membrane 17, which is affected by the handle end 13. This signal can be heard both when the fuse 8 is unscrewed and when it is screwed in and serves as an indication that the switch can be used. A fuse box for fuses (8) with end contact covers (15, 16), the upper end contact dome (16) of which is held in a receiving device and which can be brought into contact position by screwing the receiving device (7) into a threaded sleeve (5) connected to the power supply. a switch (6) preventing access to the fuse housing and having a ground contact (4) connected to the power supply, in contact with the lower terminal contact dome (15), characterized in that the base contact (4) is movably mounted, has a spring pressure (compression spring) applied against the lower terminal contact dome 9) and is connected to a bracket (11), the free end (13) of which, with the switch (6) in the open position and the base contact displaced by its spring pressure, engages behind the locking cam (14) of the clutch lever (12) so that the switch (6) ) is prevented from closing when the fuse (8) is off or when it is not fully in place ru uvattuna. Fuse box according to Claim 1, characterized in that the blocking device (11) cooperates with a membrane (17) which emits an acoustic signal.