DE2052433A1 - Push button operated overcurrent switch - Google Patents

Description

CG. 4ο. Ίο

copy

Dr. E. Vetζel 8500 Nuremberg October 23, 1970

Dipl.-Ing. E. Tergau Hefnersplatz 3

Patent attorneys Our mark

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Ellenberger ? Z Poensgen G-.mbH, Altdorf near Ilürnberg Push-button operated overcurrent switch.

The invention relates to a push button operated Over-current toraso holder with thermal release, pre-release, Howent off and momentary on, with a narrow housing and a contact bridge designed as a y-arm lever, the switch rod that is rigidly connected to the pushbutton or formed in one piece with it an axis perpendicular to the broad sides of the G-housing pivotable and displaceable in the switching direction under the action of a spring causing the release and when switching off through a housing stop into a Inclined position and when switched on by a driver of the handrail taken along at a stop and to snap into place behind a retaining lug of the bimetal strip of the thermal Triggering is brought.

üü int an over-atomic switch of this type known (German PabontfjcVirift 1 1>! 1-il "^;)>the" small, in- '.-. 'ji.or ./c'.fjc;:. it gox'ingevi iiPtori.'lonX' \. ^; rTicl and cheap hcr-:; ί.Γ.11ϊκ · .-. int hat! Ini '· hoh ^ r LoI, -. .ir.'dcuer nnverl ^ -Daig is working.

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Its housing has the following dimensions: thickness 11 mm, width 19 mm, length 42 mm.

The invention is based on the object of making this known overcurrent switch even smaller, and in particular to train flatter and to simplify its manufacture and assembly and cheaper, so that he in particular used in printed circuit boards and can be easily attached. This object is achieved according to the invention φ solved that the contact bridge is designed as a flat metal plate and is provided in the area of its pivot axis with a vertically protruding hollow rivet into which a right-angled Bend of a leg of the release causing torsion spring engages, which is with her the other leg is supported in the housing, and that the tubular rivet is guided displaceably and rotatably in a groove of the shift rod extending in the shifting direction.

_fc Since the contact bridge is constructed as a flat metal plate at erfindungsgemäßeη overcurrent switch, the overcurrent switch can be very made narrow in the direction of the pivot axis of the contact bridge. The pivot axis of the contact bridge is formed by the hollow rivet. In a space-saving manner, the hollow rivet takes on a right-angled bend of a leg of a torsion spring. Since the torsion spring can be made very space-saving, a small housing thickness is achieved with the overcurrent switch according to the invention, the

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e.g. 6 mm, with the housing 15 mm wide and 26 mm is long. Characterized. That, furthermore, the hollow rivet for the pivotable and displaceable mounting of the contact bridge in a groove the switching rod is guided, there is an extremely simple production and assembly of the overcurrent switch according to the invention.

Production is further simplified in that the hollow rivet is made in one piece as a passage with the contact bridge is trained. As a result of this training, the fastening of the hollow rivet in the contact bridge is omitted.

In a further embodiment of the invention, the groove has a stop for the at its end facing away from the push button Hollow rivet. At this stop, the switch rod is held in the on position with the push button.

As with known overcurrent switches, this can also be Housing of the overcurrent switch according to the invention from a cup-shaped housing part in which the switch parts are arranged are, and consist of a plate-shaped cover. According to a further feature of the invention, the shift rod has a extending in the switching direction, protruding web which engages in a corresponding groove of the cup-shaped housing part, against the upper boundary wall of the web in the switch-off position of the push button by a switch-off spring is pressed, which is on the one hand at the lower end

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the shift rod and on the other hand in the cup-shaped housing part supports. As a result of this training, a simple guide of the shift rod with the push button in the cup-shaped Housing part reached and the push button held in its off position. The push button has an inclined surface against which the contact bridge is pressed by the torsion spring when it is released. As a result of this Training, the contact bridge is already in the correct switch-off position after the trip-free, so that when releasing the push button after the release, the push button with the contact bridge under the action of the opening spring reaches the final switch-off position without any additional rotation.

To form a mating contact for the one fixed contact, the contact bridge has a right-angled bend, which cooperates with a fixed contact piece and whose free end is bent at right angles and the stop for forms the driver of the shift rod.

The bimetallic strip is used to enable the thin case arranged with its broad sides parallel to the broad sides of the housing and at its free end with the provided as a contact piece angularly designed retaining lug with an approximately semicircular projection of the Contact bridge cooperates.

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Just like known overcurrent switches, the one according to the invention is also Overcurrent switch provided with at least two terminal lugs, which are pin-shaped for connection to printed circuits are formed and directed perpendicular to the cover. These pin-shaped connection lugs fit exactly into the holes in the grid dimension of the printed circuit. In order to ensure a proper mechanical attachment of the invention Overcurrent switch on the printed circuit board is on the lid near the push button a metal plate is attached, the two of the pin-shaped terminal lugs modeled, protruding vertically from the cover Has pins that also engage in corresponding holes in the printed circuit board. To when soldering the pin-shaped terminal lugs in the circuit board a certain distance between the circuit board and the invention To achieve overcurrent switches, the pin-shaped terminal lugs or the two protruding Have pins shoulders with which the overcurrent switch is supported on the circuit board.

To a simple attachment of the overcurrent switch according to the invention To achieve this, the cup-shaped housing part can have recesses on the outside of the edges of its broad side, snap into the corresponding elastic projections of fastening means.

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For fastening the overcurrent switch according to the invention The plate-shaped cover can also have fastening flanges.

Embodiments of the invention are shown in the figures. Show it:
1 shows a front view of an overcurrent switch according to the invention without a cover,

Hg.2 a section along the line II-II of FIG. 1, FIG. 3 a section along the line HI-III. of Fig.1, Fig.4 the same front view as Fig.1, with the overcurrent switch is in its off position,

Fig.5 is the same front view as Fig.1, with the The overcurrent switch is in its off position when the pushbutton is pressed in (trip-free), 6 is a perspective view of an overcurrent switch

according to the invention for printed circuits, Fig.7 is a perspective view of a further overcurrent switch according to the invention,

Fig. 8 is a front view of a closed overcurrent switch according to the invention and FIG. 9 shows a section along the line IX-IX of FIG.

The overcurrent switch shown in FIGS a housing made of insulating material, which consists of a cup-shaped Housing part 1 and a plate-shaped cover 2 consists.

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The housing part 1 and the cover 2 can be aligned with one another Have bores 3, engage in the hollow rivets, the permanent connection of the cover 2 to the housing part 1 serve. Instead of the bores 3 in the housing part 1 Molded pins can be provided in the housing part 1 which engage in corresponding bores in the cover 2. In this case, the cover 2 can be attached to the housing part 1 by means of a suitable adhesive. For the electric The overcurrent switch has connection lugs 4, 5 and 6 which are inserted into corresponding recesses in the housing ™ partly 1 are inserted and held by the cover 2 in their position. The terminal lug 4 is also means a hollow rivet 7 is rigidly attached in the housing part 1.

The connection lug 5 has a fixed contact piece 8, on which a bend 9 of a contact bridge 10, serving as a mating contact, rests in the switched-on position of the overcurrent switch according to FIG. The lower end 11 of the bend 9 is bent at right angles. The contact bridge 10 is M from a flat metal plate having an approximately semi-circular projection 12 which rests against a holding nose. 13 The retaining lug 13 is designed as an angle and is welded to the free end of a metal strip 14. The bimetal strip 14 has a bend 15 with which it is welded to a pear-shaped support 16. The bimetallic carrier 16 has a bent part 17 »into which an adjusting screw 18 is screwed, which on the

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Bimetal strip 14 acts. With the help of this adjusting screw 18, the tripping current of the overcurrent switch can be set precisely. The connection lug 4 is formed in one piece with the bimetal support 16. The connection flag 4 is only used when the bimetal strip 14 is to be heated directly. There is only indirect heating in embossing, then the terminal lug 4 can be omitted. the Terminal lug 4 is cut off at dividing line 19 in this case. The bimetallic strip is used for indirect heating 14 has a heating coil 20, the upper end of which according to FIG. 1 with the bimetallic strip 14 and the lower one End is electrically connected to the terminal lug 6.

As can be clearly seen in particular from FIG. 2, the contact bridge is 10 is provided with a tubular rivet 21 in the area of its pivot axis. A right-angled rivet engages in the hollow rivet 21 Bend 22 of a leg 23 of a torsion spring 24 one, which is with its other leg 25 on a projection 26 of the housing part 1 is supported.

The hollow rivet 21 engages in a groove 27 of a shift rod 28 a, which is made in one piece with a push button 29 from insulating material. With the hollow rivet 21 is the contact bridge 10 pivotally mounted in the groove 27 and displaceable in the switching direction. The shift rod 28 has on its rear side an integrally formed web 30 which is inserted into a corresponding Groove 31 of the housing part 1 engages, whereby the switching

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rod 28 and the push button 29 are properly guided in the housing part 1. In the off position of the push button 29 the upper end of the web 30 rests against the upper boundary wall of the groove 31. The lower boundary wall of the groove 27 is used as a stop 33 'in the switched-on position according to FIG this stop 33 rests against the hollow rivet 21 of the contact bridge 10 under the action of an opening spring 34, which is connected with one end is supported on the lower end of the switching rod 28 and with the other end on a wall 35 of the housing part 1. To hold this compression spring 34 · the lower end of the Shift rod 28 is provided with a truncated conical pin 36. The shift rod 28 also has an integrally formed driver 37, which is connected to the bent end 11 of the contact bridge 10 can work together.

At higher currents, the contact point between the retaining lug 13 and the projection 12 of the contact bridge 10 can through

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The mode of operation of the overcurrent switch described is the following:

If an overcurrent occurs in the switch-on position according to FIG on, then the bimetal strip 14 · either directly or indirectly by means of the heating coil 20 is heated so that it bends counterclockwise according to FIG. 3 and its retaining lug 13 moves in the direction of arrow 38.

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After the retaining lug 13 has moved out of the area of the projection 12 of the contact bridge 10, are not at locked push button 29, both the torsion spring 24 and ■ also the switch-off spring 34 are effective. The torsion spring 24 moves the contact bridge 10 upwards according to FIG. When striking the contact bridge 10 on a projection 39 of the housing part 1, the contact bridge 10 is counterclockwise pivoted and reaches the position shown in Figure 4 at the end of their movement. Arrived at the same time also the switch rod 28 with the push button 29 under the action of the switch-off spring 34 into the switch-off position shown in FIG.

If the push button 29 is held in the depressed position in FIG nevertheless a release (free release) under the action of the torsion spring 24, the contact bridge 10 at a Inclined surface 40 of the push button 29 applies.

The torsion spring 24 causes not only a momentary switch-off, but also a momentary switch-on. Is in the off position 4 the push button 29 is pressed into the housing, then the driver 37 detects the contact bridge 10 at its bent end 11 and takes this contact bridge 10 with it into its switched-on position, to be precise the effect of the torsion spring 24. As soon as the projection 12 of the contact bridge 10 engages below the retaining lug 13

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the push button 29 can be released. Here, on the one hand, the switching rod is tintered by the switch-off spring 28 moved upwards with the push button 29 and on the other hand the contact bridge 10 under the action of the torsion spring 24-im Clockwise according to FIG. 1 around the projection 12 as the fulcrum panned. As soon as the bent end 11 of the contact bridge 10 leaves the driver 37, the contact bridge 10 becomes swiveled jerkily clockwise by the torsion spring 24, whereby the bend 9 of the contact bridge 10, acting as a counter-contact, abruptly abuts the fixed contact piece 8 got. This abrupt activation is the aforementioned ™

Momentary activation.

In the case of the overcurrent switch according to FIG. 6, the connection lugs 5 ', 6' are designed in the form of pins. The pins 5 ", 6" of the terminal lugs 5'i 6 'fit into the holes in the grid dimension of a printed circuit. On the lid 2 of the overcurrent circuit breaker, a metal plate 4-1 is additionally riveted, the two integral therewith formed pins 4-2 and having 4-3, which also fit in the pitch of the gedruck- λ th circuit and provide an anti-rotational fixing this overcurrent switch . Since the pins 5 ", 6", 4-2, 4-3 have shoulders 44- which are supported in the inserted state of these pins on the circuit board of the printed circuit, there is a very specific distance between the overcurrent switch and the circuit board.

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At the overcurrent switch after. 7 '(scale 2: 1), the cover 2 ^{1 has} two fastening flanges 45 with bores through which the fastening screws reach.

At the overcurrent switch according to li'ig. 8 and 9 shows that Housing part 1 'recesses 47, 48 and 49, into the elastic projections 50 made of, for example, plastic Fastening means 51 snap into place when the circuit breaker is inserted into the fastening means 51.

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Claims (10)

Claims; 1. Push-button-operated overcurrent switch with thermal release, trip-free, momentary and momentary switch-on, with a narrow housing and a contact bridge designed as an angle lever, which are mounted on a switching rod that is rigidly connected to the pushbutton or formed in one piece with it, around an axis perpendicular to the broad sides of the housing pivoted and displaceably mounted in the switching direction under the action of a spring causing the release and when switched off by a housing stop in an inclined position and when switched on by a driver of the switching rod at a stop and brought to engage behind a retaining lug of the bimetallic strip of the thermal release, thereby characterized in that the contact bridge (10) is designed as a flat metal plate and is provided in the area of its pivot axis with a vertically protruding hollow rivet (21) into which a right-angled bend (22) of a leg (23) % e iner the release causing torsion spring (24) engages, which is supported with its other leg (25) in the housing, and that the hollow rivet (21) is displaceably and rotatably guided in a groove (27) running in the switching direction of the switching rod (28). 2. Overcurrent switch according to claim 1, characterized in that that the hollow rivet (21) in one piece as a passage with the nL _; v; '~ le not Eontaktbrücke (10) is formed. 3. Overcurrent switch according to claim 1, characterized gekennzeich-.net, that the groove (27) at its end facing away from the push button (29) has a stop (33) for the hollow rivet (21) having. 4. Overcurrent switch according to claim 1, the housing of which a cup-shaped housing part in which the switch parts are arranged, and a plate-shaped cover, characterized in that the switching rod (28) has an in Has protruding web (30) running in the direction of switching, which engages in a corresponding groove (31) of the cup-shaped housing part (1), against its upper boundary wall (32) the web (30) in the switched-off position of the push button (29) is pressed by a switch-off spring (34), which on the one hand at the lower end of the switching rod (28) and on the other hand in the cup-shaped housing part (1). 5 overcurrent switch according to claim 1, characterized in that that the push button (29) has an inclined surface (40) against which the contact bridge (10) when released the torsion spring (24) is pressed. 6. Overcurrent switch according to claim 1, characterized in that the contact bridge (10) has a right-angled bend (9) which together with a fixed contact ^{piece (8) 1} Vom Dcvitr-Chrn Patent Office 209823 / OU7 ni .:, c; don't be works and the free end (11) is bent at right angles and the stop for the driver (37) of the shift rod (28) forms. 7. Overflow switch according to claim 1, characterized in that that the bimetallic strip (14) is arranged with its broad sides parallel to the broad sides of the housing and on its free end with that as KonboJ; tntü.clr. :; angular formed retaining lug (13) is provided with an approximately semicircular projection (12) of the contact bridge (10) texted together. ™ 8. Overcurrent switch according to one of the preceding claims with at least two connection lugs, characterized in that the connection lugs (5 '»6') for connection to printed Circuits are pin-shaped and directed perpendicularly from the cover (2) and that on the cover (2) in height the push button (29) a metal plate (41) is attached, which simulates two of the pin-shaped terminal lugs (5 '»6'), Pins (42, 43) | protruding vertically from the cover (2) having. 9. Overcurrent switch according to claim 4, characterized in that that the cup-shaped housing part (1) has recesses (47, 48, 49) on the outside at the edges of its broad side, into which corresponding elastic projections (50) of fastening means (51) snap. From the DeutnchTs Pr'entamt ear. · ^; '-rig et -.- :. . ·.;: -. ;. »R, ter- 209823 / 0H7 not Qeelonst Bind. _BATH 10. Overcurrent switch according to claim 4 ·, characterized that the plate-shaped cover (2) has fastening flanges. Vom Doutochon Patantafflt ohr- :: · > ■■■ ■ · ■■■ ·· ^ ¹ ^ ¹⁹ _C {. · .'.-. · ■::,. ■. ·., "^; J niter * 209823 / 0U7 ■; .-. ■ ·: .- ·;.: ^ Ο not tiind.