Electromagnetic relay

Details Electromagnetic relay Electromagnetic relay

1996-12-24

1999-01-19

Donovan, Lincoln

Electricity: magnetically operated switches, magnets, and electr

Electromagnetically actuated switches

Polarity-responsive

335281, H01H 5122

Patent

active

058617850

ABSTRACT:
An electromagnetic relay, having a core 3 fixed by press-fitting in a yoke 4, which is facilitated in attaching operation and eliminated of the possibility, during press-fitting, of being placed in poor contact by metal chips produced by cutting away the yoke 4 by the core 3. The core 3 is provided with a smaller diameter portion 3c at an end portion and is inserted into a center of a bobbin 1 having a coil 2 wound therearound. A cutout 5 is formed in the yoke 4 so as to receive by press-fitting the smaller diameter portion 3c of the core 3. First slant surfaces 6 are formed in the edge of an opening of the cutout 5 such that the wall thickness becomes thinner toward the opening. Second slant surfaces 7 are provided in the form of curved surfaces at the terminal ends of the first slant surfaces in a manner smoothly continuing to a general surface of the yoke 4 and also to the first slant surfaces 6. The terminal ends of the second slant surfaces 7 are positioned on a diametrical center line of the core 3 when the core 3 is attached to the yoke 4.

REFERENCES:
patent: 3896405 (1975-07-01), Pauli
patent: 4365223 (1982-12-01), Fechant et al.
patent: 4443775 (1984-04-01), Fujitani et al.
patent: 4596972 (1986-06-01), Knight et al.

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