Contact unit for electromagnetic relays
AssigneeMatsushita Electric Works, Ltd.
InventorJohannes Oberndorfer
Life of this patent
Estimating the term…
Abstract
For increasing the reliability of contact closure in safety relays, a contact spring (10) is provided with two contact pieces (15, 16) which are disposed at the free end of the contact spring (10), spaced transversely of the longitudinal axis thereof and cooperate with contact pieces (17, 18) disposed on a common fixed contact. The contact spring (10) has a zone (19) in which it is not only flexible but also sufficiently torsional about its longitudinal axis in order to ensure the closure of both contact couples. Disposing the free end of the contact spring (10) carrying the contact pieces (15, 16) at an angle with respect to the fixed contact (12) achieves smooth and low-bounce contact closure and at the same time provides the function of a pre-contact and a main contact.
Claims15
A contact unit for electromagnetic relays, the contact unit including a fixed contact providing two contact locations and a contact spring having a longitudinal axis, a fixed end and a free end, and providing two contact locations disposed at an undivided portion of said free end, spaced in a direction transverse of said longitudinal axis and cooperating with the contact locations of said fixed contact, a zone of said contact spring between said fixed end and said contact locations providing increased torsional flexiblity about said longitudinal axis.
Dependencies are inferred from the claim text.