Snap-action drive and switching device having a snap-action drive
A snap-action drive for a switching device has an energy store, a swinging movable part and a securing device for the movable part. The securing device secures a position of the swinging movable part by a force effect, wherein a reversal of direction of the movable part takes place counter to the force effect.
1. A snap-action drive for a switching device, the snap-action drive comprising:
an energy store;
a gear mechanism having a swinging movable part, wherein said swinging movable part acting as a lag element in said gear mechanism; and
a securing device for said swinging movable part, a reversal of direction of said swinging movable part takes place counter to a force effect of said securing device.
2. The snap-action drive according to claim 1 , wherein said swinging movable part and said securing device form a bistable system.
3. The snap-action drive according to claim 1 , wherein said swinging movable part assumes an unstable state when said energy store is charged.
4. The snap-action drive according to claim 1 , wherein said gear mechanism has a slotted link, by means of said slotted link at least one of charging or discharging of said energy store is controlled.
5. The snap-action drive according to claim 4 , wherein said slotted link has at least one end stop for bounding a movement which can be output by said gear mechanism.
6. The snap-action drive according to claim 1 , wherein said swinging movable part is mounted in a rotationally movable fashion.
7. The snap-action drive according to claim 1 , further comprising a storage charging mechanism having a two-armed storage-charging lever which is rotatably mounted.
8. The snap-action drive according to claim 7 , wherein rotational axes of said swinging movable part and said two-armed storage-charging lever are oriented coaxially.
9. A snap-action drive for a switching device, the snap-action drive comprising:
an energy store;
a gear mechanism having a swinging movable part;
a securing device for said swinging movable part, a reversal of direction of said swinging movable part takes place counter to a force effect of said securing device, wherein said securing device has a dead-center spring; and
said swinging movable part and said securing device forming a bistable system.
10. The snap-action drive according to claim 9 , wherein said energy store has a dead-center spring.
11. The snap-action drive according to claim 10 , wherein a dead center of said dead-center spring of said securing device and of said energy store apply force effects to said swinging movable part in opposing directions.
12. The snap-action drive according to claim 10 , wherein traversing of a dead center of said dead-center spring of said energy store, causes a stable state of said bistable system to change.
13. The snap-action drive according to claim 10 , wherein a dead center of said dead-center spring of said securing device and of said energy store are traversed in chronological succession.
14. The snap-action drive according to claim 9 , wherein said swinging movable part is driven by outputting of energy from said energy store of the snap-action drive.
15. A switching device, comprising:
a snap-action drive containing an energy store, a gear mechanism having a swinging movable part where said swinging movable part acts as a lag element in said gear mechanism, and a securing device for said swinging movable part, a reversal of direction of said swinging movable part taking place counter to a force effect of said securing device; and
switching contact pieces which can move relative to one another and whose relative movement can be brought about by said snap-action drive.