FI72408C - SAEKRINGSSOCKEL. - Google Patents

Description

72408

This invention relates to a diazed or Neozed type safety fuse, in particular to the attachment of a spiral bridge and a base rail to an insulating body, which may be ceramic, glass, plastic or other insulation.

5 In current fuseholders, the threaded bridge (including the thread to the fuse cover and the cable connector) is generally attached to the insulating body with two screws through the insulating part.

In one solution, the screws have been replaced with pipe rivets or stamped pieces of plate.

10 The known construction is furthermore a screwless fastening, in which the projections of the helical bridge are first pressed into recesses in the upper surface of the insulating body, to the lateral extensions of which the projections of the helical bridge are locked by rotational movement.

15 The disadvantages of screw fastening are small threaded threads, which require their own work, as well as an expensive automatic screwdriver, which is also very susceptible to interference, and loosening of the screws due to vibration, which causes the joint to be destroyed.

20 The disadvantage of a helical bridge construction which locks in the insulating frame by rotational movement is the difficulty of making angular recesses in the insulating frame in the tools, and the fact that the helical bridge must also be locked against rotation separately.

Bottom rail means 25 rails made of a conductive material to which a bottom contact is attached or which conducts current to the lower end of a fuse (Neozed).

A base rail is required for both single and row fuses, where the same rail conducts current to several fuseholders. The base rails are most often fastened to the insulating frame with one or more screws 30, but also with interlocking pins 2 72408 through openings made in the side walls of the insulating frame, whereby end locking takes place by forming an end barrier in one way or another.

It is also known to a rider's fuse, in which the fuse box 5 is pressed from the front onto the base rail with screws, by pushing a transverse beam under the bottom rail from the side, or by pressing the fuse box on the rail at its narrow the available languages.

The disadvantages of screw fastening are the same as for a threaded bridge. The transverse beam requires a long movement, so it is difficult to remove from the front if necessary, which is now a requirement, as it must be possible to replace a damaged fuse box with a new one at the installation site without dismantling the wiring.

A fuse box that locks with a branch movement is difficult to use because the base rail connectors placed between the fuse boxes prevent the branch.

With the fuse box according to the invention, the above-mentioned disadvantages have been eliminated, at the same time the number of parts and the use of material, as well as the necessary installation equipment costs have been minimized. To achieve this, the device according to the invention is characterized by what is stated in the characterizing part of claim 25.

The invention is described below with reference to the accompanying drawing, and the invention is implemented in accordance with the claims.

The invention may be practiced otherwise than as shown in the drawing, provided that the conditions of the claims are met.

3 72408

Figure 1 shows a fuse housing according to the invention from the side, seen from the direction of the threaded bridge connector.

Fig. 2 shows the fuse box from the side, perpendicular to the projection of the figure, while Fig. 3 shows the fuse box 5 in the axial direction of the helical bridge, seen from the front.

Figure 4 shows the individual fuse box viewed from the side perpendicular to the direction of the base rail, so that the locking of the base rail in place is illustrated.

Figures 5 and 6 further show preferred embodiments of the helical bridge attachment 10.

. 1 13

In Fig. 1, part 1 is an insulating body to which the thread-1-2 and the base rail 5 are attached without screws.

The part 3 is a protrusion of the threaded bridge to which the conductor connector is attached. * The protrusion or protrusions 4 of the part 3 partially lock the threaded bridge 15 into the recess 9 made in the insulating body 1 by means of the protrusion 7.

Fig. 2 shows the same parts as Fig. 1, but in addition 6, which is a bent protrusion of threaded bridge material with locking tabs 4 which, as described above, lock into the recess or recesses 8 formed in the insulating part 1 when the threaded bridge 2 is mounted from the side (right) to the frame. 1.

The detachment of the threaded bridge 2 to the side can be prevented either by the front edge 27 of the insulating body 1, Fig. 3, rising above the lower surface of the flange part 25 of the threaded bridge 25, Fig. 6, as a barrier. 4, or that the helical bridge is provided with a notch or protrusion preventing a branch, which rests on a corresponding shape of the insulating body 1, according to claim 2.

On the bottom side of the fuse box there is a recess 12, on both sides of which there are thresholds 13 made with interleaved pins, the distance between which is shorter than the width of the base rail 5.

4 72408

The base rail 5 is pressed in a slightly oblique position into the recess 12, whereby its right edge presses into the recess 10 which is so deep to the side (right) that the left edge of the base rail 5 reaches the top of the left sill 13. By moving the base rail 5 to the left over the threshold 13, a spring or the like 11 on the right prevents the rail 5 from moving to the right into the recess 10, whereby the base rail 5 remains firmly on both thresholds 13.

Fig. 3 shows the front of the fuse box in the direction aks0 of the spiral bridge 2. The thresholds 13 supporting the base rail 5 are shown in broken lines behind the rail 5.

The spring or the like 11 locking the lateral movement of the base rail 5 may be located elsewhere than in the center line, and there may be several of them.

By making one or more recesses, projections or the like 14 on the edge or edges of the base rail 5, which fit the corresponding shape in the insulating body 1, the end movement of the base rail 5 can be locked, as in patent application 5.

Fig. 4 shows the attachment of the base rail 18 of an individual housing to the insulating body 1, in which an opening 8 is most preferably formed in the side wall by interlocking plugs for mounting the base rail 18 in place, e.g. through the central opening 17 of the fuse box. One or more tongues 16 are formed from the base rail material, which, when pressed into the groove or grooves 15, lock the base rail 18 in the insulating body 1.

The tongue or tongues 16 can also be formed in the opposite direction, whereby the base rail 18 is pressed into place from the outside from the left, and locked by pressing the tongue 30 16 into the recess 15, which is now made on the opening 8 side.

The end movement of the base rail 18 can also be limited by projections formed by the insulating body 1 or the like 19 and / or 20.

72408 5

The base rail 18 can be, for example, bent or box-shaped in cross-section, and locking to the insulating body 1 can take place by lateral or inwardly pivoting projections, or if the insulating body 1 is e.g. plastic: by heat, ultrasound or mechanically molding.

According to a particular development, the helical bridge 2 and the base rail 5 or 18 are placed in a mold into which the material forming the insulating body 1 is cast or injected, whereby the metal parts of the above-mentioned shapes are locked in place.

Figure 5 shows specific developmental forms of the fastening of the helical bridge 2.

The position of the locking lug or projection on the circumference of the helical bridge may vary, and there may be one or more projections. 15 For example, it is not necessary to use the connecting projection 3 of the spiral bridge at all for fastening, which can be treated with other projections.

The shape of the protrusions can vary greatly:

The locking in the insulating body 1 can take place by means of one or more tongues, openings, bent projections or hooks or the like.

The locking can take place in the direction of the center of the fuse box, outwards, sideways or diagonally.

Locking can also take place by turning the protrusion Fig. 5, 22. Locking can also take place as shown in Fig. 6, if the edge 25 of the helical bridge 2 is pushed below the protrusion 26 formed in the insulating body 1, the second locking point being as mentioned above.

According to claim 3, the tongue or tabs corresponding to the flange projection 25, Fig. 6 of the helical bridge 2 are formed of the material of the threaded part of the helical bridge 2.

Claims (5)

72408 A single or row fuse of the Diazed or Neozed type, in which the threaded bridge (2) and the base rail (5, 18) are attached to the insulating body (1) without screws. To attach the threaded bridge (2) to the insulating body (1) in the threaded ring, one or more protrusions (3, 6) facing the base rail (5) are formed, and the base rail (5) is attached to the insulating body (1) on both sides of the frame (5). 1) supported by tongues (13), characterized in that the connector part above is moved from the side of the insulating body (1) above the body (1) to its final position without the need to thread the fuse from the threaded bridge (2), whereby the shapes (4) in the projections (3, 6) , 21 ... 24) lock the threaded bridge (2) to the respective shapes of the insulating body (1) in the axial direction of the housing without having to bend in any way, and that the T-shaped groove formed for mounting the base rail (5) on the insulating body (1) expands to one side the narrow edge of the base rail (5) above laterally fits so far that the narrow edge opposite the rail can pass the rail of the insulating body (1) in question. a protrusion (13, Fig. 2) for supporting the edge, after which the rail (5), moved laterally away from the opening (10), rests on both edges of the projections (13) of the body (1), and to prevent the rail (5) from sliding sideways into the opening or the like (10) is one or more spring-like or similarly operating parts (11) extending laterally towards the narrow edge of the rail (5), which can be pressed or lifted in front of the edge of the rail (5) to install the rail (5) or the angle of the rail (5) its up or down, from which it returns to the locking position when the rail (5) has been moved from the opening (10) to its final position. Fuse holder according to Claim 1, characterized in that the locking of the helical bridge (2, Fig. 6) to the insulating body (1) takes place partially or completely at the edge of the flange part of the helical bridge (2) or its extension (25) and the front edge of the insulating body (1). 26) by means of. Fuse box according to Claim 1, characterized in that the tongue or tongues corresponding to the flange projection (25, Fig. 6) of the threaded bridge (2) are formed from the material of the threaded part of the threaded bridge (2). Fuse box according to one of the preceding claims, characterized in that the branch of the helical bridge (2) is delimited by the projection or projections (27, Fig. 3) of the leading edge of the insulating part (1), or of the helical bridge (2) protrusion 35 or the like. 1). 72408 Fuse holder according to one of the preceding claims, characterized in that one or more recesses, tongues or the like (14, Fig. 3) are provided for locking the row fuse-base rail (5, Fig. 3) at their ends, which lock into the corresponding shape of the insulating body (1) without different 5 additional locking parts. 7 9 4 0 8 Patentkrav f £ - Ό