DE2043042C3 - Magnetic field operated bistable electrical switch - Google Patents

Description

5. Switch according to claim 4, characterized in that the two poles approaching each other are so marked shows that the Shah's permanent magnet (16) increases in size, the smaller the distance between them. Here Shifting into the open position of the switch 40 results in the same risk as explained above as in ters associated position against the leaf spring (12) of the first-described known embodiment beats. on.

(1. Switch according to claim 4 or 5. thereby The invention has the object of providing a

characterized in that the soft iron armature (13) bistable electrical switch of the initially described

is formed by an angle, one of which is ^{indicated by 45 Ixtien A r} t, at which on the one hand a slight

Leg with its free end d ^ n air gap adjustability of the switching permanent magnet safe-

(26) forms and whose other leg is placed on the. on the other hand, however, in the contact system

Blue spring (12) is attached and moving forces can occur.

borrowed contact (14). According to the invention, this object is thereby achieved. Switch according to one of Claims 1 to 50, solves the problem that the soft iron poles are attached to fixed pole pieces characterized in that the pivoting movement is formed, each with one pole of the switching permanent magnet The switching permanent magnet (16) is assigned by one and on the same side from the central stop (25) is limited. level are offset that the movable contact \ on

is loaded by an opening spring and that the soft

55 cisenanker with one pole piece an air gap

variable size, via the position of the switching device assigned to the closed position

The invention • b '.' / I '.' Ht "- I au! One, magnetic field - Πη.ιι ^ Γρι-igneten an essential part of the soft-

actuate bistable electrical switch with permanent iron pole absorbed magnetic flux goes,

magnet, which can be pivoted about a central axis 60 In this design, the fixed

uikI created by two soft iron poles offset from the central plane, defined relationships,

iron poles in one of the stable positions that allow the permanent switching magnets with low

hold is. whereby a permanent adjustment device can be used to adjust any lowering forces from the outside. The closing force

right to the switching permanent magnet on one of which in the contact system depends on the air gap between

PoI can be passed and the movable contact with the soft iron armature and one pole piece

is connected to a soft iron anchor. away. Since this air gap can become zero, result

Such bistable electrical switches have to deal with the ma-

The advantage that the switching mechanism is fully integrated into very high closing forces. The power of

The opening spring can be freely selected over a wide range. If they only serve to keep it open it can be depicted very weakly, if it should support opening or serve as a closing spring for a counter contact, it can be made stronger within the range predetermined by the magnetic closing force.

Appropriately, the pole pieces have pronounced poles and one slightly above the center plane

a rod 3 connected to a float 4 and is through the level of a liquid 5 in the direction the arrows 6 moves up and down

The working system is of a ceramic sock 7 and a glass envelope 8 included. On the socket 7 sits a carrier 9 for a fixed contact 10 and a Support frame 11 on which a bronze spring 12 the is biased in the opening direction, an angular Soft iron anchor 13 with a movable

D Ttll IJ points

a white iron pole piece 22 with a pronounced pole 23. The two poles 20 and 23 are offset from the center plane 24 on the same side. Uie pole shoes extend from the pole to a little over this central plane 24. A web 25 on the support frame I

ShlDneten according to>

occupies

protruding appendix. In this way a large 10 contact 14 is attached. The support frame 11 has Part of the magnetic flux also has a bracket 15 via the pole piece. in which a bcnaitleitung. Permanent magnet 16 pivotable about its central axis 17

It is particularly useful if the air gap is supported. At a further bracket 18 is a one ausanker from between the one pole piece and the soft-soft iron pole piece 19 of existing rnit mounted on the opposite side of the pole ₅ i embossed Pol 20th A third bracket-l carries the median plane. In this way, regardless of a soft iron pole piece 22 ™ ^ ^Μη ^ \ ³ ^ § ^^ all other structural conditions ensured that the magnetic flux is partly on
Soft iron anchor, partly flowing over the pole piece.

This not only eliminates the magnetic attraction ao _U i ^. »» ... ^. ^ · - - - - - - ,,

force between the two parts, but it serves as a stop for the switching permanent magnet

a repulsive force arises, which forces the opening in both of its switching positions. Dei lulM.nj.ii;

strength reinforced. and the armature 13 form on the pole 20 opposite

In a particularly simple execution, ngsform overlying side of the central plane a paral el / u

the opening spring is an air gap 26 running around the movable contact 25 of this center plane, which is shown in FIG

supporting leaf spring, so that contact carrier and con Fi g. 2 equals zero in and in F 1 g. 3 its Cirobi value

Laktfeder be formed by a component.

It is very beneficial here if the switching duration

maenet when shifting to the opening control "". »^, ..-. - -.

the "switch assigned position against the sheet 30 illustrated position. Most of the \ on uei spring strikes. In this way, the south pole S results in the face of outgoing Magnethnien co-Uaktsystem another opening force. In an extreme case, this can impact force Opening force

the spring and the repulsive force between anchor ou., ^^ ..., .....-. »- · - .

and pole piece be effective so that even distorted end face of the north pole N can be opened if welded contacts are distorted as a result. between PoKhuh 19 and anchor 13 there is a strong

For the structural design, it is recommended that the contacts 10. 14 trot / der Otsich, that the soft iron anchor by an angle clamping force you spring 12 keeps closed. So that «Is educated. one leg of which with its free remaining components does not end the magnetic system forms the air gap and its other lines 40 flow, the contacts 10, 14 can be made of silver Kel is attached to the leaf spring and the moving of the! rager 9 and the support frame 11 made of brass unu

the spring 12 made of bronze.

If the permanent setting magnet 2 is now moved upwards,

so the south pole S of the permanent switching magnet 16 is attracted. He snaps into the position of FIG. 3 around and will be there, even when moving forward

In Fig. 2, i.e. in the closed position of the contacts 10. 14, if the permanent switching magnet 16 has reached

collects :: m pole 20 and is guided over the air gap 26 to the armature 13. The magnetic lines kick out of the anchor and run through the air to the

borrowed contact. A fastener is then sufficient to attach contacts and angles to the leaf spring. In addition, the contact is through the Wave your hand! reinforced.

To achieve particularly precise work, the pivoting movement of the switching permanent magnet can be limited by a stop. So surrender precisely defined stable positions and therefore also precisely defined forces in the switch.

The invention is described below with reference to an exemplary embodiment shown in the drawing explained in more detail. It shows

Fig. 1 is a schematic representation of the inven- ._, -

The switch according to the invention in connection with a 55 runs over the anchor 13. As a result, does not stop Swimmer, only the attraction between the two soft

Fig. 2 shows a horizontal longitudinal section through the cise parts, but there is even a switch with closed contacts and

1 1 g. 3 shows the representation of FIG. 2 with open contacts.

The switch consists of a work system 1 and a permanent magnet 2. The latter is over

of the magnet 2. held firmly because the salient pole 23 in connection with the magnetic forces holds the magnet 16 in the illustrated position. During the opening movement, the first change magnetic conditions at the air gap 26. because part of the magnetic flux coming from the end face of the south pole 5 of the switching permanent magnet goes out via the pole piece 19, but the other part

MJungskraft. The preloaded spring 12 gives one further drive in Öiinungsrichtung. In the end Iritft also still the magnet 16 with its south pole lying the spring 12 so that even with welded Contact is opened.

1 sheet of drawings

Claims (4)

»Arrange in an encapsulated manner and, with the help of the permanent patent claim: magnets can be operated from the outside, ie without a mechanical connection. 1. Bistable electrical switch with permanent switch of this type (Swiss magnet, which can be swiveled about a central axis and two soft iron poles assigned by two permanent magnets located in the center plane, the put soft iron poles in one of the stable ones attached to a swiveling soft iron anchor Positions is held, with a Steii are permanent. The soft iron anchor is around a Syrnmetnemagnet about perpendicular to the switching permanent magnet axis pivotable and carries the moving contact, one pole of which can be guided past and the moving permanent magnet is in such a way on one pole Removable contact with a soft iron armature of the switching permanent magnet that he is connected, thereby marked simultaneously on both poles of the switching permanent magnet net that the soft iron poles (20, 23) acts on solid. Pole shoes (19, 22) each formed with one pole. However, difficulties arise here. WnI (S, N) of the switching duration (16) assigned 15 a sufficiently strong contact pressure must be and on the same side from the Mirtel plane, place the soft iron pole close to the pole of the switching (24) \ are replaced so that the moving contact allows permanent magnets to swivel towards them. (14) is loaded by an opening spring (12) and then there is the danger that the Stefl that the soft iron armature (13) with one magnet can no longer exert enough force to Pole shoe (19) an air gap (26) variable 20 the switching permanent magnet in the other stable position GmLk 'is used to switch to the closed position. Conversely, if you choose one assigned position of the switching permanent magnet Distance between the soft iron pole and the pole of the scarf; an essential part of the soft iron pole on permanent magnets, that this through the Stell-Dauei taken magnetic flux goes. magnets can be used under all circumstances 2. Switch according to claim 1, characterized in that it can be the forces occurring in the contact system draws that the pole pieces (19, 22) are markedly limited. Pole (20. 23) and a something about the middle level (24) have protruding appendage. th switch is on the swiveling permanent switch 3. Switch according to claim 1 or 2. characterized by the magnet of a contact that is identified by the ScIuI; that the air gap (26) between 30 permanent magnets connected with a flexible lead a pole piece (19) and the soft iron end, and the mating contact on a leaf spring anchor (13) attached to the opposite pole (20). Furthermore, the one pole of the switching duration the side of the central plane (24). "Magnets also two from a central plane wi- 4. Switch according to one of claims 1 to 3, assigned soft pins, which, however, are fixed characterized in that the opening spring 35 are attached. With a swivel movement de-. (12) a switching permanent magnet carrying the movable contact (14) approaches this one pole Leaf spring is. each to one of the soft iron poles, so that the