SK4792000A3 - Electric switch for devices - Google Patents

Abstract

A switch for devices, which can be arranged with a fuse with a fuse-link or without a fuse, basically consists of a housing (1) having two equal halves (2), whereat both housings differ in that the housing with a fuse is extended for the width of a bed (3) for a fuse-link (4). In both halves (2) of the housing (1) there are beds (6, 7, 8) in the shape of ribs for fixed contacts (9, 10) and a contact (11) of the fuse-link (4). A moving contact (12) is guided in rib guides (13), supported by a spring (14) and directly controlled by a rod (15). On its opposite side the rod (15) reaches into a break handle (17), with which the switch is manually broken. The handle (17) has bearings on an axle (18) lying in both halves (2) of the housing (1). The rod (15) is near the handle (17) guided in each half (2) of the housing (1) by an arch-shaped rib (21), the centre of which lies in the centre of the axle (18). In both halves (2) of the housing (1) there are arch-shaped wings (26) near the axle (18) with the centre of their arch lying concentrically to the axle (18) or to the rib (21), which are arranged with an indentation (27) as a bed of the rod (15) with the contacts open. An arch (19) is eccentrically positioned with respect to the axle (18) or to the wing (26) so that in the position of the handle (17) with the electric contacts open, one end of the arch (19) lies near the limit fence (20) between the indentation (27) and the axle (18) and the opposite end of the arch (19) lies near the limit fence (20') on the imaginary arch-shaped extension of the wing (26) via the indentation (27). In the most open position of the handle (17), the rod (15) perfectly fits into the indentation (27) and the handle (17) is free of the force of the spring (14) exerted via the rod (15).

Description

Technical field

The object of the invention is an electrical switch for a device, in particular a switch intended to be placed in a rail, wherein the switch can be in the same housing with a fuse, preferably with a fuse with a fuse-link.

BACKGROUND OF THE INVENTION

The technical problem solved by the present invention is to provide an electrical switch with the fewest possible number of simple components that will allow for simple and quick assembly while meeting all required standards and quality requirements. Furthermore, the product should also be cost effective and competitive.

Similar switch to German Patent Application DE 2618360 (Lindner

GmbH), whose housing comprises a fuse with a fuse-link, comprises a fuse actuator with an eccentrically arranged lever that temporarily moves the movable contact away from the fixed contact when the actuator is in the on or off position. When the fuse-link is removed, the movable contacts are moved apart by a special spring, and at the same time the fork is displaced, one free end of which prevents the fuse actuator from turning in the absence of the fuse-link in the housing. In order to ensure a balanced position of the contacts, both in the open and in the buckled state, a control device and a three-member lever are used, the latter being provided with a movable contact supported by three springs. One fixed contact is also supported by a special spring and includes a fork that prevents the actuator from closing when the fuse insert is not in place.

Said switch complies with all regulations, but is expensive because it contains elements that are very complicated to manufacture due to the required tools required. A large number of components make the switch time-consuming to install, making the product even more expensive.

In another similar switch according to German Gebrauchsmuster DE-U-86 11 082 (Lindner GmbH), the number of components of the electrical switchgear is reduced in comparison with said DE 26 18 360 patent. It comprises only a holder, a lever and an electric movable contact, wherein the upper end of the lever remains in the two-position bearing in the holder only by the force of the spring pushing said movable contact towards the holder. To ensure a secure contact position of the switch in the disconnected position, the tip remains on the lever in the convex portion of the fuse housing that is part of the electrical switch housing.

This embodiment of the electrical switch for the device contains fewer parts than the previous switch, but the rest of the assembly (the lever tip and the convex portion of the fuse holder) require a greater amount of material, which can cause problems in cooling the case housed in the insert.

SUMMARY OF THE INVENTION

The solution to the technical problem lies in the concept of a switch assembly that will perform all functions with fewer, simpler parts that are cheap to manufacture and allow for faster and easier assembly. However, the new concept must comply with all regulations and standards.

The novelty and characteristic of said switch is that the fuse lever comprises an eccentric wing in which only one rod is recessed and which, at its opposite end, lies directly in the movable contact. The lever also comprises a material-lockable spring ensuring the closed position of the lever when the contacts are closed, while providing the play of the rod and lever in this position, so that the corresponding pressure of the closed contacts is ensured, the pressure being determined by the spring below the movable contact. The eccentric wing in the housing also regulates and positions the rod during its movement and keeps it in both extreme positions. Only one spring acting directly on the movable contact provides a force to maintain the position of the movable contact in both extreme positions, and the pressure pushes both movable contacts to both fixed contacts.

The switching part of the switch according to the invention comprises only a lever, a rod, contacts and a spring, as well as shaped wings and wires located directly in the housing, and a spring in the lever.

Such a structure, based on the simple shape of the individual parts, requires a simple tool for thermoplastic casting of the housing, lever and rod. The contacts are also designed in a known manner that does not require any special manufacturing technology. The result is a quick and easy assembly with simple insertion of all elements into one half of the housing, and then this part is closed by the other half. All elements are always connected to each other.

BRIEF DESCRIPTION OF THE DRAWINGS

The characteristics of the invention are further described in more detail by means of two embodiments and figures, in which: FIG. 1 is a switch for a device comprising a fuse having a fuse in a state with contacts in cross-section along the connecting surface of the two housing halves; Fig. 2 shows the same switch in a state with the lever open, the contact open and the fuse cartridge removed; and FIG. 3 shows the same switch in the lever closing or switching state.

DETAILED DESCRIPTION OF THE INVENTION

A switch for a device that can be arranged or with a fuse with or without a fuse generally consists of a housing 1 comprising two identical halves 2, the housings differing in that the housing with the fuse is wider by the fitting size 3 of the fusible element. however, the arrangement of the bearing 3 of the fuser insert 4 is not the subject of the present invention, nor does it have the same

the invention has no influence. As for the outer shape and size of the housing 1, it is made in accordance with standards, and the housing is preferably arranged for placement in a bar, not shown in the figures, by a groove 5 at the rear thereof.

The housing halves 2 comprise ribs 6, 7, 8 in the form of ribs for the fixed contacts 9, 11) and the contact H of the fuser 4. The movable contact 12 is guided in the rib conductors 13 and is supported by a spring 14. 15, which is actuated in its axial direction in the rib conductors 16 lying on the housing halves 1 in the region of the movable contact 12. On its opposite side, the rod 15 passes into the movable lever 17, which is used for manually opening the switch. The lever 17 comprises

In relation to the axis 18, the lever comprises an eccentric circular arc 19 forming an angle of approximately 45 ° and limited on both sides by limiting edges 20 and 201. The rod 15 in the vicinity of the lever 17 is furthermore extending in both housing halves 2 and the circularly shaped ribs 21 whose center lies in the center of the axis 18. All the ribs 21 are disposed so as to extend into a circularly shaped groove 22 formed on the lever 17. External circularly shaped segment 23 of the lever 17 near the groove 22 acts as a spring and is provided at its free end with a small protrusion 24. The protrusion 24 contacts a similar protrusion 25 on the housing 1 when the lever Π is in the closed position, i.e. with the contacts on. In the two halves 2 of the housing 1 there are circularly shaped wings 26 formed near the axis 18 and the center of said arcs lies coaxial with the axis 18 and the rib 21. In the region of the rod 15 with the electrical contacts open, the wing 26 is arranged with a notch 27 as a bearing The notch 27 lies in the direction of the imaginary extension of the rib conductor 16 of the rod 15 and is closed by a limiting edge 28.

The arc 19 is eccentric with respect to the axis 18 and the wing 26 such that in the position of the lever 17 with the electrical contacts open, one end of the arc 19 lies near the limiting edge 20 between the notch 27 and the axis 18 and the opposite end of the arc 19 near t

The limiting edge 20 'lies on the imaginary arc extension of the wing 26 by the notch 27. Thus, in the most open position of the lever 17, the rod 15 fits into the notch 27 and the lever 17 is depressurized by the spring 14 through the rod 15.

The lever 17 and the housing 1 have holes 28 for attaching elements not shown in the figures.

The switch is opened by rotating the lever 17 from its end position when it is inside the housing halves 2 (FIG. 1), whereby a seal not shown in the figures can be broken. During rotation of the lever 17, the projection 24 of the lever 17 first contacts the projection 25 of the housing 1, which makes it possible to sense that the lever 17 is in the working field. Then the restraining edge 20 abuts against the bar 15, guided by the rib 21 and the circular arc 19 of the lever Γ7. During further rotation of the lever 17, the movable contact 12 temporarily moves away from the fixed contacts 9, 10 and interrupts the circuit. By rotating the lever 17 to the open position, the rod 15 moves along the aileron 26 until it is pressed into the notch 27 near the aileron 26. Due to the arc position c / PC / B between the notch 27 and the axis 18 the rod slides from the aileron 26 into the notch where it remains due to the force of the spring 14.

With the contacts in the off position, the spring 14 no longer acts on the lever 1Ί or on the axis 18 through the rod 15 (Fig. 3). The released lever 17 with the contacts off can be freely rotated by an angle given by the width of the notch 26.

In the off position, the lever 17 releases the fuse housing 3 so that it can be removed without any tool to replace the fuse. A spring tooth 29 located on the side of the lever 17 is located in the housing 3 of the fuse 4, which, when the bearing 3 is removed from the housing, abuts the tooth on the lever 17 and prevents direct removal of the bearing 3 from the housing 1. bushing only by bending the spring tooth 29 with a small screwdriver or similar tool.

When switching on the switch (Fig. 3), the lever 17 is rotated in the opposite direction. After the lever 17 is freely rotated so that the limiting edge 20 'contacts the top of the bar 15, the eccentric arch 19 of the bar 15 rises from the notch 27. If the lever 17 is further rotated, the arc 19 near the limiting edge 20' of the lever 17 moves the bar 15 so that it moves along the wing 26. In an unbalanced position on the arc 19 it temporarily travels along the lane 15 due to the action of the spring 14 from the position on the arc 19 in the limiting edge 20 'to the position on the arc 19 near the opposite limiting edge 20. 9, 10 via the contact 12. With the movable contact 12 located on the fixed contacts 9, 10, and the spring 14 acting, the rod 15 and the lever 17 relieve the force of the spring 14, which ensures a long service life and hence the required minimum number of switches.

With the knowledge of the described embodiments, one skilled in the art can suggest another embodiment without departing from the spirit of the invention as defined in the appended claims.

¾ / 97-9 -2oo ° - <£ -

Claims (3)

MODIFIED PATENT CLAIMS I A switch for a device comprising fixed contacts (9, 10), a movable contact (12) and a contact (11) for a fuser (4); a housing (1) having two halves (2) comprising first rib conductors (13) for guiding the movable contact (12), a rib-like bearing (6,7,8) for fixed contacts (9, 10) and preferably for contact (11) ) for the fuser (4); a spring (14) supporting the movable contact (12); a lever (17) for manually switching the switch on and off, the lever comprising bearings on an axis (18) lying in both housing halves and a circular arc (19) limited on both sides by a first (20) and a second (20 ') limiting edge; a rod (15) for directly controlling the movable contact, one end of the rod being guided in the second rib conductors (16) located in the housing halves (2) in the region of the movable contact and the other end extending into the groove defined by the circular arc (19) and a second limiting edge (20, 20 '); characterized in that, in the vicinity of the axis (18), the two housing halves have circularly shaped wings (26) disposed with the center of their arc lying coaxial with the axis (18), the wings (26) in the area of contact with the rod (15), the levers (17) with the contacts open, have at one end a notch (27) which lies in the direction of the imaginary extension of the second fin conductors (16) and is closed by a third limiting edge (28); and the arc (19) is positioned eccentric with respect to the axis (18) so that, in the position of the lever (17) with the contacts open, the end of the arc lying near the first limiting edge (20) is located between the slot (27) and the axis (18); the end of the arc lying near the second limiting edge (20) lies on an imaginary circular shaped wing extension (26) behind the notch (27). Switch for the device according to claim 1, characterized in that the circular arc (19) forms an angle of approximately 45 °. The switch for the device according to claims 1 and 2, characterized in that the rod (15) in the vicinity of the lever (17) is guided in both halves (2) of the housing (1) by a circular rib (21) whose center lies in the center an axle (18), each rib positioned in such a way as to extend into a circularly shaped groove (22) located in the lever (17), wherein an external, circularly shaped segment (23) of the lever (17) near the groove (22) acts as a spring and comprises a small protrusion (24) contacting a similar protrusion (25) on the housing (1) when the lever (17) is in its closed position, i.e. with electrical contact on.