We Claim:
1. A contactor electromagnetic system, comprising a base (5) and a coil (3)
provided in the base (5), a magnet yoke (2), an armature (1) and an elastic
cushioning piece located between the coil (3) and the base (5); when the coil
(3) is energized, the magnet yoke (2) and the armature (1) are combined
integrally under the action of electromagnetic attraction so as to impact the
base (5) along the axial direction of the coil (3); the elastic cushioning piece
cushions vibration generated after the magnet yoke (2) and the armature (1)
impact the base (5),
wherein an installation hole (21) penetrating through two side walls of the magnet yoke (2) is shaped on the magnet yoke (2) and the installation hole (21) extends in a direction perpendicular to the axial direction of the coil (3); the elastic cushioning piece is a leaf spring (4) and the middle part of the leaf spring (4) is an arc inserted into the installation hole (21) and protruding towards an impacted part of the base (5); the arc is compressed and deformed by the wall of the installation hole (21) when the magnet yoke (2) and the armature (1) impact the base (5) and rebound in an opposite direction.
2. The contactor electromagnetic system according to claim 1, wherein
the arc top of the arc-shaped middle part of the leaf spring (4) inserted in the
installation hole (21) is pressed on the wall of the installation hole (21) or has a
compensation gap reserved with the wall of the installation hole (21) before the
magnet yoke (2) and the armature (1) are pulled in.
3. The contactor electromagnetic system according to claim 2, wherein
the arc is a circular arc protruding towards the impacted part of the base (5).
4. The contactor electromagnetic system according to any one of claims 1
to 3, wherein a section of the installation hole (21) along an extension direction
thereof is square, and the arc top of the arc is pressed on a planar side wall of
the installation hole (21) along the axial direction of the coil (3).
5. The contactor electromagnetic system according to claim 4, wherein
the middle part of the leaf spring (4) is in clearance fit with the installation hole

(21) in a vertical direction of a coordinate plane formed by the extension direction of the installation hole (21) and the axial direction of the coil (3).
6. The contactor electromagnetic system according to any one of claims 1
to 5, wherein two ends of the leaf spring (4) are bent towards an impacted side
wall of the base (5) so as to form two bent bumps (41) facing the coil (3) on the
junction with the middle part; the two bent bumps (41) are pressed on an end
of the coil (3) directly facing the impacted side wall of the base (5); the two bent
bumps (41) slide back and forth along the surface of the end of the coil (3)
during the process that the armature (1) and the magnet yoke (2) impact the
base (5) and then vibrate to compress and deform the leaf spring (4) and the
leaf spring (4) rebounds.
7. The contactor electromagnetic system according to claim 6, wherein
the surface of the end of the coil (3) is a flat surface.
8. The contactor electromagnetic system according to any one of claims 1
to 7, wherein a normal direction of the leaf spring (4) at the arc top is
overlapped with the axial direction of the coil (3) and the direction of an
electromagnetic force generated by the armature (1) and the magnet yoke (2).
9. The contactor electromagnetic system according to claim 8, wherein
the two ends of the leaf spring (4) respectively extend towards two sides to
contact two side walls of the base (5) when being compressed by a side wall of
the installation hole (21) of the magnet yoke (2) to deform maximally.
10. The contactor electromagnetic system according to any one of claims
1 to 9, wherein the magnet yoke (2) includes a horizontal part (22) and three
parallel vertical parts (23) vertically connected to the horizontal part (22); the
vertical part (23) located in the middle extends into the coil (3) and the
horizontal part (22) directly faces the impacted side wall of the base (5).
11. The contactor electromagnetic system according to claim 10, wherein
the installation hole (21) is shaped at the position of the horizontal part (22)
directly facing the vertical part (23) extending into the coil (3).
12. The contactor electromagnetic system according to claim 10, wherein

the installation hole (21) is respectively shaped on the horizontal part (22) between two adjacent vertical parts (23); and the two installation holes (21) have the same size and are provided symmetrically along the axial direction of the coil (3).
13. The contactor electromagnetic system according to any one of claims
1 to 5, wherein the two ends of the leaf spring (4) are fixedly provided opposite
to the base (5).
14. The contactor electromagnetic system according to any one of claims
1 to 13, wherein at least one elastic bump (6) is provided on the impacted side
wall of the base (5).
15. The contactor electromagnetic system according to claim 14, wherein
there are two elastic bumps (6).
16. The contactor electromagnetic system according to claim 15, wherein
the two elastic bumps (6) are respectively provided between the horizontal part
between the two adjacent vertical parts of the magnet yoke (2) and the
impacted side wall of the base (5) and the two elastic bumps (6) are provided
symmetrically along the axial direction of the coil (3).
17. The contactor electromagnetic system according to claim 16, wherein
the elastic bumps (6) are made of a plastic material.