ELECTRIC SWITCH FOR DEVICES

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: ELECTRIC SWITCH FOR DEVICES The subject of the invention is an electric switch for devices, especially a switch to be built on a lath, whereat the switch can be implemented in the same housing with a fuse, preferably a fuse with a fuse-link The technical problem solved by this invention is how to conceive an electric switch with the smallest possible number of simple component parts, which would make possible a simple and quick mounting and at the same time comply with all required standards and quality Furthermore, the product should also be price-effective and competitive A similar switch according to the German patent DE 26 18 360 (Lmdnei GmbH), the housing of which contains a fuse with a fuse-link, contains a break handle with an eccentrically arranged lever which momentarily shifts a moving contact from fixed contacts when the handle is in switch-on or in switch-off position With the fuse-link lemoved, the fixed contacts shift apart by means of a special spring, simultaneously a folk shifts, one free end of which prevents the turning of the break handle with which a contact would be closed in absence of a fuse-link in its bed To assme a balanced position of contacts in both open and closed states, a handle assembly and a three-membei lever are used, on the latter there is a moving contact supported by three sprmgs One fixed contact is also supported by a special spimg and contains a fork which prevents the handle from closing when a fuse-link is not it its place Said switch complies with all regulations but it is expensive because it contains elements the production of which is very complicated due to demandmg tools needed A great number of component parts call foi a time-consummg mounting of the switch, which also lenders the product even more expensive The solution to the technical problem lies in a concept of a switch assembly which would perform all operations with a smaller number of simpler component parts that will be cheap to produce and will make possible a quicker and simpler mountmg The new concept must, however, comply with all regulations and standards A novelty and characteristic of the said switch is m that its break handle contains an eccentric wmg, into which only one rod is put and which lies with its opposite end directly in a movmg contact The handle also contams a material-locking spring assming the closed position of the handle when the contacts are closed and at the same time provides for the clearance of the iod and the handle in this position so that an appropriate pressure of the closed contacts is assured, the pressure bemg determined by the spring under the movmg contact The eccentric wmg m the housing also regulates and positions the rod during its movement and holds it in both extreme positions Only one sprmg operating directly on the moving contact assures the force to preserve the position of the movmg contact m both extreme positions and the pressure pushes both movmg contacts to both fixed contacts The switch part of the switch accordmg to the invention comprises only a handle, a rod, contacts and a sprmg as well as shaped wings and guides positioned directly m the housing and a sprmg in the handle Such structure based on a simple shape of individual parts requires a simple tool for thermoplastic casting of the housing, the handle and the rod The contacts are also designed in a known way, which does not lequire any special manufacturing technology The result is a quick and simple assembling with simple insertion of all elements into one half of the housing and then this part is closed with another half All elements are mutually permanently connected The characteristics of the invention are explained in moie detail in the continuation by means of two embodiments and diawings Figures show Fig 1 a switch for the device with a fuse with a fuse-link in the state of closed contact in cross-section along the connection surface of both halves of the housing, Fig 2 the same in the state of an open handle, open contact and removed bed of the fuse-link, Fig 3 the same m the state of closmg the handle or switch-on, Fig 4 a switch for devices (without a fuse) m the state of closed contact and m cross-section along the connection surface of both halves of the housmg The switch for devices, which can be arranged with a fuse with a fuse-link or without a fuse, basically consists of a housmg 1 having two equal halves 2, whereat the housings differ in that the housing with the fuse is extended for the width of a bed 3 for a fuse-link 4 However, the arrangement of the bed 3 for the fuse-link 4 is neither an object of this invention nor has any influence on it As far as the outer shape and measures of the housmg 1 are concerned, it is executed in compliance with standards and is preferably arranged to be placed on a lath which is not shown on diawings, by means of a groove 5 at its rear side The halves 2 of the housmg 1 have beds 6, 7, 8 in the shape of nbs for fixed contacts 9, 10 and a contact 1 1 of the fuse-link 4 A moving contact 12 is controlled in rib guides 13 and supported by a spring 14 The movmg contact 12 is directly controlled by a rod 15, which is controlled in its axial direction in rib guides 16 lying on the halves of the housing 1 in the area of the moving contact 12 On its opposite side the rod 15 leaches into a break handle 17, which is used to manually bieak the switch The handle 17 has a bearing on an axle 18 lying in both halves 2 in the housing 1 In lelation to the axle 18, the handle has an eccentric circle arch 19 forming an angle of approximately 45° and is limited by limit fences 20 and 20' on both sides The rod 15 near the handle 17 is additionally guided in each half 2 of the housing 1 with an aich-shaped rib 21, the centre of which lies in the centre of the axle 18 Each nb 21 lies so as to reach into an arch-shaped slot 22 arranged on the handle 17 An external aich-shaped segment 23 of the handle 17 near the slot 22 acts as a sprmg and is executed with a small projection 24 at its free end The projection 24 leans against a similar projection 25 on the housmg 1 , when the handle 17 lies in the closed position, l e with the contact closed In both halves 2 of the housing 1 there are two aich-shaped wings 26 arranged near the axle 18, and the centre of the said aiches lies concentrically to the axle 18 and the rib 21 In the area of the position of the rod 15 with the electric contacts open, the wing 26 is arranged with a step indentation 27 as a bed of the rod 15 The indentation 27 lies m direction of an imaginary extension of rib guides 16 of the rod 15 and is closed by a limit fence 28 The arch 19 is eccentrically positioned with respect to the axle 18 and to the wmg 26 in such a way 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, the opposite end of the arch 19 near the limit fence 20' lies on the imaginary arch extension of the wing 26 via the indentation 27 Thus at the most open position of the handle 17 the rod 15 fits into the indentation 27 and the handle 17 is ieleased off the pressure of the spring 14 via the lod 15 The handle 17 and the housing 1 have holes 28 foi fastenmg elements which are not shown in the drawings The switch is opened by turning the handle 17 fiom its final position when it lies inside the hah es 2 of the housmg 1 (Fig 1), whereby a seal, which is not shown in the drawings, can be broken When rotating the handle 17, the projection 24 of the handle 17 fust overcomes the projection 25 on the housing 1, which gives the feeling that the handle 17 is in the working field Then the limit fence 20 leans against the rod 15 guided by the rib 21 and the circle aich 19 of the handle 17 When lotating the handle 17 further, the moving contact 12 tempoianly moves away fiom the fixed contacts 9, 10 and bieaks the circuit By turning the handle 17 toward its open position, the rod 15 moves along the wing 26 until it is pushed to the indentation 27 neai the wmg 26 Due to the position of the arch 19 between the indentation 27 and the axle 18, the rod slips off the wmg 26 into the indentation in which it remains due to the force of the spring 14 With the contacts in switched-off position the spπng 14 does not any longei act on the handle 17 or the axle 18 via the iod 15 (Fig 3) The released handle 17, with the contacts switched off, can be freely turned for an angle determined by the width of the indentation 26 In its switch-off position the handle 17 releases the bed 3 of the fuse 4, so that it can be removed without any tool m order to replace the fuse In the bed 3 of the fuse 4 there is a sprmg tooth 29 arranged on the side of the handle 17 which, when the bed 3 is removed from the housmg, leans against the tooth of the handle 17 and prevents a direct removal of the bed 3 from the housing 1 Only by bending the spring tooth 29 by means of a small screw-driver or a similar tool, the bed 3 can be entirely taken out of the housmg 1 When switching on the switch (Fig 3), the handle 17 is turned in the opposite direction When the handle 17 has been turned freely, so that the limit fence 20' leans against the top of the rod 15, the eccentric arch 19 lifts the rod 15 from the indentation 27 If the handle 17 is further turned, the arch 19 neai the limit fence 20' of the handle 17 moves the rod 15 so that the latter travels along the wmg 26 In its unbalanced position on the arch 19 it temporarily trips over the bar 15 due to the opeiation of the spring 14 from position on the arch 19 at the limit fence 20' into the position on the arch 19 near the opposite limit fence 20 and momentarily closes the electric contacts 9, 10 via the contact 12 With the movmg contact 12 positioned on fixed contacts 9, 10 and with the spring 14 operating, the rod 15 and the handle 17 get rid of the force of the spring 14 which assures a long life and thus the required minimum number of switch-ons and switch-offs of the switch Knowing the described embodiments, a peison skilled in the ait can design ofhei embodiments without cncumventmg the essence of the invention defined in the attached patent claims

Claims: Claims 1 A switch for devices consistmg of a housmg (1) contaimng a bed (3) for a fuse- link (4), whereat two halves (2) of the housmg (1) contain beds (6, 7, 8) in the shape of ribs for fixed contacts (9, 10) and a contact (1 1) of the fuse-link (4) and a moving contact (12) is guided m rib guides (13) and supported by a sprmg (14), whereas for the manual switch-on and switch-off of the switch a handle ( 17) is foreseen, characterized in that the movmg contact (12) is directly controlled by a rod (15) which is guided in its axial direction in rib guides ( 16) lying on the halves (2) of the housing (1) in the area of the moving contact ( 12) and on its opposite side reaches into the break handle (17), whereat the handle (17) has bearings on an axle ( 18) lying m both halves (2) of the housing ( 1) 2 The switch for devices accoidmg to claim 1 characterized in that the handle (17) has, with respect to the axle (18), an eccentric circle arch ( 19) which forms an angle of approximately 45° and is limited at both ends by limit fences (20 and 20') 3 The switch foi devices according to clanns 1 and 2 characterized in that the rod ( 15) near the handle ( 17) is guided in each half (2) of the housing ( 1) by an arch- shaped rib (21), the centre of which lies in the centie of the axle (18), whereat each rib (21) lies in such a way that it reaches into an arch-shaped slot (22) arranged in the handle ( 17), whereby an external arch-shaped segment (23) of the handle (17) near the slot (22) is executed as a sprmg and contains a small projection (24) leaning against a similar projection (25) on the housing ( 1) when the handle ( 17) lies in its closed position, I e with the electric contact closed 4 The switch for devices according to claims 1 to 3 characterized in that in both halves (2) of the housing (1) near the axle (18) aich-shaped wmgs (26) are positioned with the centre of their arch lying concentrically to the axle (18) or the nb (21), whereat the wing (26) in the contact area with the rod (15), with the electric contacts open, is arranged with an indentation (27), which lies in the duection of an imaginary extension of the nb guides ( 16) of the iod (15) and is closed by a limit fence (28) The switch for devices according to claims 1 to 4, characterized in that the arch (19) is eccentrically positioned with respect to the axle (18) or the wing (26) so that one end of the arch (19) lies near the limit fence (20) between the indentation (27) and the axle (18) in the position of the handle (17) with open electric contacts, the opposite end of the arch ( 19) lies neai the limit fence (20') on the imaginary arch-shaped extension of the wmg (26) via the indentation (27)

Inventors: SEMROV ANTON, SEMROV, ANTON
Applicants: ETI ELEKTROELEMENT DD, SEMROV ANTON, ETI ELEKTROELEMENT D.D., SEMROV, ANTON
Application year: 1998
Main classification: H01H9
IPC codes: H01H9, H01H21, H01H71