HUT53980A - Fuse patron for electrical apparatuses - Google Patents

Description

FIELD OF THE INVENTION The present invention relates to a fuse for electrical devices.

69700-1553 / S0V • ·

- 2 It is known to provide fuses of various current ratings, which have a socket with a hole for fusing a fuse screw. Usually, a brass contact screw is inserted into the bore of the socket from the outside, which is fixed with a binder in the socket.

The precise positioning of the contact screw and the application of the binder to the respective surfaces of the contact screw and socket require very fine, precise work that would be difficult to automate. Particular care should be taken to ensure that the binder does not run on the contact surface of the contact screw or on the socket.

After applying the binder and inserting the contact screw, the fuse must be dried to speed up the bonding.

Thus, the installation of the above fuse is a very labor-intensive and relatively time-consuming operation which cannot be automated efficiently.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a design for a fuse insert that overcomes the above deficiencies.

Thus, the problem to be solved is to achieve a connection between the socket and the contact screw without the use of a drying binder.

SUMMARY OF THE INVENTION The object of the present invention has been achieved by gradually increasing the internal diameter of the bore from the inside edges of the bore to the inwardly opening opening of the bore, the contact head has towards the inside of slot facing end flared flange and the contact screw contact head circular biztositógyürü is fitted on which abuts the bore diameter portion and a widened edge of the contact head is gradually increasing, and dp <d _g <d _Q <. dp + s, where d _{Q is} the inside diameter of the socket hole, dp is the diameter of the contact screw contact head, d _{g is} the diameter of the expanding flange of the contact head and s is the diameter of the circular cross-section of the securing ring.

The fuse of the present invention eliminates the use of a binder so that the fuse can be produced in less time and labor and automated assembly.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a longitudinal sectional view of an exemplary embodiment of a fuse insert according to the invention, and Fig. 2 is an enlarged detail of Fig. 1.

As can be seen from the drawing, the fuse insert according to the invention has a cylindrical socket 1 with a hole 3 at the bottom. A screw 2 is provided in the bore 3 having a contact head 7 with a flange extending at the top.

The hole 3 receiving the contact head 7 has a section 4 of increasing diameter starting from the top edges 6, which extends above / dl to the upward opening of the hole 3. As shown in Fig. 2, the increasing diameter section 4 of the bore 3 is arcuate in longitudinal section.

Between the widening upper flange 7 of the contact screw 2 and the flange 6 of the bore 3, a circular cross-section retaining ring 5 is inserted. The safety rings 5 have a circular cross-section s diameter. As shown in Figure 2, the seven contact head dr d _p smaller diameter than the head 7 contacts the upper flared rim diameter d _g which is in turn smaller than the inner bore diameter d _Q. However, the sum of the diameter d _{p of the} contact head 7 and the circumference s of the securing ring 5 is greater than the inside diameter d _{Q of} the hole 3:

s greater than the sum of the diameters.

In the exemplary embodiment, the contact screw 2 is preferably configured to have a larger diameter flange below the contact head 7, which externally abuts the edge of the downwardly opening of the bore.

Claims (1)

I. Circuit-breaker for electrical appliances having a contact screw and a socket with a contact screw receiving bore, characterized in that the internal diameter (d _Q ) of the bore (3) of the contact screw (2) starting from the inner edges (6) of the bore Longitudinally extending longitudinally in the arcuate section (4) to the opening (3), the part (7) of the contact screw (2) has a smaller diameter (d _p ) than the inside diameter (d) of the bore (3) end facing has a widened rim and is fitted over (7) of circular cross-section retaining ring (5) of the contact bolt (2) in contact with the head of which (4) and (7) at the edge widening of the contact head bears against the bore (3) of the section of increasing diameter, and ^d p ^{< d} s < ^d o ^<d p ^{+ s} ' where d _{s is} the diameter of the expanding flange of the contact head (7) and the diameter of the circular cross-section of the securing ring (5) Rojek.