Miniature dual in-line package electrical switch

• US 4,975,548 A
• Filed: 12/15/1989
• Issued: 12/04/1990
• Est. Priority Date: 12/15/1989
• Status: Expired due to Fees

• Current Assignee: Augat, Inc. (TE Connectivity Ltd. (United Kingdom))
• Original Assignee: Alco Electronic Products Incorporated
• Inventors: Brouilette, Peter, Ciufetti, Salvatore D.
• Primary Examiner(s): SCOTT, JAMES R
• Application Number:
  US07/451,371
• Time in Patent Office: 354 Days
• Field of Search: 200/5 R, 200/5 A, 200/6 R, 200/6 B, 200/6 BA, 200/6 BB, 200/6 C, 200/11 R, 200/553, 200/558, 200/559, 200/569, 200/339, 200/302.1, 200/302.3, 200/303
• US Class Current: 200/5.00R
• CPC Class Codes: H01H 23/006 adapted for connection with printed circuit boards
• CPC Class Codes: H01H 23/168 using cams

Abstract

An electrical switching device of the dual in-line package type. A multiple-pole switching device contains a plurality of independent switching elements aligned on individual pole planes. Each switching element includes first and second terminals and stationary contacts centered on the pole plane. A movable contact engages a first stationary contact and is held in position by a boss on a cover actuator. An actuator, captured in the cover-actuator, includes a cam that engages an intermediate portion of the movable contact to move the second end of the movable contact into engagement with the second stationary contact to complete an electrical circuit. The cam and movable contact are configured to produce a detent action as the actuator moves between open and closed positions.

Claims

1. An electrical switch comprising:

A. insulating base unit means including first and second conductive terminal means and insulating wall means defining a cavity therein about said terminal means, each said first and second conductive terminal means comprising an external terminal section and an internal stationary contact section, said first and second conductive terminal means lying in a pole plane with said contact sections being spaced from each other,

B. movable contact means disposed in said cavity and in said pole plane, said movable contact means having a first end portion, a first intermediate portion for engaging said first stationary contact section, a second intermediate portion adjacent said first intermediate portion for forming a cam follower and a second end portion, and

C. cover means for closing said base unit means and including support means with capture means for engaging said first end portion of said movable contact means thereby to maintain the said first intermediate portion in engagement with said first stationary contact section, said cover means additionally including actuator means capatured by said support means and rotatable therein between first and second positions, said actuator means including a depending cam means for engaging said cam follower whereby said second end portion of said movable contact is, respectively, spaced from said second contact portion in a first position of said actuator means and forced into contact with said second contact portion in a second position of said actuator means.

2. An electrical switch as recited in claim 1 wherein said movable contact means includes a central slot at least coextensive with said first intermediate portion.

3. An electrical switch as recited in claim 1 wherein said second end portion of said movable contact means is bifurcated.

4. An electrical switch as recited in claim 1 wherein said movable contact means includes a radiused portion between said first and second intermediate portions, said radiused portion providing a detent action when said cam passes over said radiused portion.

5. An electrical switch as recited in claim 1 wherein said insulating base unit means includes slots formed on the sides of the cavity and said movable contact means includes transversely extending ears at said first intermediate portion for engaging said slots thereby to position said movable contact means in said insulating base unit cavity.

6. An electrical switch as recited in claim 1 wherein said actuator means includes a bearing surface formed therein and said cover means includes journal means for engaging said bearing surface, said actuator means rotating about said journal means.

7. An electrical switch as recited in claim 6 wherein said actuator means includes first and second spaced stop means and wherein said cover means includes first and second spaced stop means, said first stop means on said actuator means and cover means limiting the rotation of said actuator means within said cover means in one direction and said second stop means on said actuator means and said cover means limiting the rotation of said actuator means in the opposite direction.

8. A multiple pole switching device of the dual inline package type comprising:

A. an insulating base means for having a plurality of side and parallel intermediate walls and end walls and a transverse base section for defining a plurality of independent cavities in said base unit, said base means additionally comprising first and second conductive terminal means each comprising an external terminal section and an internal stationary contact section, said first and second conductive terminal means lying in a pole plane in each of said cavities with said contact sections being spaced from each other and being supported by said base means,

B. a plurality of movable contact means, each said movable contact means being disposed in one of said cavities and in a corresponding pole plane, each said movable contact means having a first end portion, a first intermediate portion for engaging a first stationary contact section, a second intermediate portion adjacent said first intermediate portion for forming a cam follower and a second end portion, and

C. cover means for closing said base means and including support means with capture means for each said pole for engaging the first end portions of said movable contact means thereby to maintain said first intermediate portion of each contact means in engagement with the corresponding first stationary contact sections, said cover means additionally including a plurality of spaced actuator means independently captured by said support means and independently rotatable therein between first and second positions, each said actuator means including a depending cam means for engaging a cam follower on a corresponding one of said movable contact means whereby the second end portion of a said movable contact means is spaced from a corresponding one of said second contact portions in a first position of said actuator means and is forced into contact with the second contact portion in a second position of said actuator means.

9. An electrical switch as recited in claim 8 wherein each said movable contact means includes a central slot at least coextensive with said first intermediate portion.

10. An electrical switch as recited in claim 8 wherein the second end portion of each said movable contact means is bifuracted.

11. An electrical switch as recited in claim 8 wherein each said movable contact means includes a radiused portion between said first and second intermediate portions, said radiused portion providing a detent action when said cam on a corresponding one of said actuator means passes over said radiused portion.

12. An electrical switch as recited in claim 8 wherein said insulating base means includes slots formed in said end and intermediate walls on the sides of each of said cavities and each of said movable contact means includes transversely extending ears at said first intermediate portion for engaging a corresponding set of slots in a cavity thereby to position said movable contact means in said insulating base unit cavity.

13. An electrical switch as recited in claim 8 wherein each said actuator means includes a bearing surface formed therein and said cover means includes journal means formed at each pole plane for engaging said bearing surfaces, each said actuator means rotating about said journal means.

14. An electrical switch as recited in claim 13 wherein each said actuator means includes first and second stop means and wherein said cover means includes first and second stop means located in each pole plane, said first stop means on said cover means and corresponding actuator means in a pole plane limiting the rotation of said actuator means within said cover means in one direction and said second stop means on said cover means and corresponding actuator in a pole plane limiting the rotation of said actuator means with said cover means in the opposite direction.

15. An electrical switch as recited in claim 8 wherein said intermediate walls have a thickness that is at least twice the thickness of said end walls whereby said switching means can be severed between said pole planes by cutting through said intermediate walls.

16. An electrical switch as recited in claim 8 wherein said cover actuator means includes means for connecting to said intermediate walls whereby said base means and cover means define enclosed cavities for each adjacent pole.

17. An electrical switch as recited in claim 8 wherein said actuator means in U-shaped and has a push button surface and said cover means has enclosed openings for receiving said push button surfaces, said push button surfaces being surrounded by said cover means.

18. An electrical switch as recited in claim 8 wherein said actuator means have a generally U-shaped portion with a firs push button surface coextensive with an arm of said U-shaped portion extending through said cover means, said cover means having an aperture surrounding said first push button surface and the other arm of said actuator means terminating in an elongated member extending oppositely from said first arm member and terminating at the edge of said cover means, said cover means having an open-ended aperture formed therein to receive said elongated member.