Abstract There is provided a method of producing a contact switching device comprising a step of pressing an electrically conductive metal sheet to form a lead frame having at least one relatively resilient contact member extending from one of the terminal portions and a stationary contact member extending from the other terminal portion, the relatively resilient contact member and the stationary contact member being disposed in mutually opposed and spaced apart relation, a step of bending external rim portions of the lead frame while the relatively resilient contact member is biased in such a manner that the opposed relatively resilient contact member and stationary contact member are brought together into partially overlapping relation, a molding step for forming an insulating base at base portions of the two terminal members, and a terminal-forming step of cutting the lead frame to leave the two terminal portions. The contact switching device as produced in the above manner, which has several advantages, is also described.
A method of producing a contact switching device comprising: a step of pressing an electrically conductive metal sheet to form a lead frame having at least one relatively resilient contact member extending from one of terminal portions and a stationary contact member extending from the other terminal portion, said relatively resilient contact member and said stationary contact member being disposed in mutually opposed and spaced apart relation, a step of bending external rim portions of said lead frame while said relatively resilient contact member is biased in such a manner that the opposed relatively resilient contact member and stationary contact member are brought together into partially overlapping relation, a molding step for forming an insulating base at base portions of said two terminal members, and a terminal-forming step of cutting said lead frame to leave two terminal portions.
Claim 2
Independent Claim
138 words
A method of producing a contact switching device comprising: a step of pressing an electrically conductive metal sheet to form a lead frame having at least one relatively resilient contact member extending from one of terminal portions and a stationary contact member extending from the other terminal portion, said relatively resilient contact member and said stationary contact member being disposed in mutually opposed and spaced apart relation, a step of bending external rim portions of said lead frame while said relatively resilient contact member is biased in such a manner that the opposed relatively resilient contact member and stationary contact member are brought together into partially overlapping relation, a molding step for forming an insulating base at base portions of said two terminal members, and a terminal-forming step of cutting said lead frame to leave two terminal portions.
Claim 3
Dependent Claim
47 words
A method of producing a contact switching device according to claim 1, further comprising a step of forming a contact point each at a free end of said relatively resilient contact member and at a free end of the corresponding stationary contact member in said overlapping position.
Claim 4
Dependent Claim
30 words
A method of producing a contact switching device according to claim 1, wherein said bending step is a single press operation involving the use of a die and a punch.
Claim 5
Dependent Claim
39 words
A method of producing a contact switching device according to claim 1, further comprising a step of assembling a contact drive element comprising an electromagnet for depressing said relatively resilient contact member from the top of the molded base.