Method and apparatus pertaining to keypad frets

• US 9,082,567 B2
• Filed: 11/09/2012
• Issued: 07/14/2015
• Est. Priority Date: 11/09/2012
• Status: Active Grant

• Current Assignee: Malikie Innovations Limited (Key Patent Innovations Limited)
• Original Assignee: Blackberry Limited
• Inventors: Chen, Chao, Li, Xiaofeng, Huang, Li
• Primary Examiner(s): Luebke, Renee
• Assistant Examiner(s): SAEED, AHMED M
• Application Number:
  US13/673,245
• Publication Number:
  US 20140131181A1
• Time in Patent Office: 977 Days
• Field of Search: 200/345, 200/314, 200/341, 200/310, 200/311, 200/5.A
• US Class Current: 1/1
• CPC Class Codes: H01H 13/88 Processes specially adapted for manufacture of rectilinearly movable switches having a plurality of operating members associated with different sets of contacts, e.g. keyboards
• CPC Class Codes: H01H 2223/008 metallic
• CPC Class Codes: H01H 2229/02 Laser
• CPC Class Codes: Y10T 29/49105 Switch making

Abstract

A keypad comprises a keypad frame and a metal spacer disposed on a backside thereof. At least one metal fret having a plurality of metal standoffs is disposed amongst the corresponding keycaps. These metal standoffs connect to the metal spacer (for example, via laser welding). The keypad frame can include a plurality of registration components and the metal spacer can include corresponding registration component-receiving openings disposed therein.

Claims

1. An apparatus comprising:

a keypad frame;

a metal spacer disposed on a backside of the keypad frame;

at least one metal fret disposed amongst keycaps on a frontside of the keypad frame, wherein the metal fret is directly affixed to the metal spacer.

2. The apparatus of claim 1 wherein the metal spacer comprises a grid-based spacer.

3. The apparatus of claim 1 wherein the metal spacer comprises a stainless steel spacer.

4. The apparatus of claim 1 wherein the keypad frame includes a plurality of registration components and wherein the metal spacer includes corresponding registration component-receiving openings disposed therein.

5. The apparatus of claim 1 wherein the metal fret affixes to the metal spacer via a plurality of metal standoffs.

6. The apparatus of claim 5 wherein a laser weld directly affixes the metal standoffs to the metal spacer.

7. The apparatus of claim 5 wherein the metal fret further comprises at least one registration component that is configured to conformably register with a registration component-receiving opening in the keypad frame.

8. The apparatus of claim 1 wherein the at least one metal fret comprises a plurality of metal frets that are disposed amongst the keycaps on the frontside of the keypad frame, wherein the plurality of metal frets are all directly affixed to the metal spacer.

9. The apparatus of claim 8 wherein the plurality of metal frets are disposed substantially parallel to one another.

10. The apparatus of claim 8 further comprising at least one additional metal fret that is disposed along a periphery of the keycaps on the frontside of the keypad frame, wherein the at least one additional metal fret is directly affixed to the metal spacer.

11. A method comprising:

disposing at least one metal fret amongst a plurality of keycaps on a frontside of a keypad frame;

disposing a metal spacer on a backside of the keypad frame;

directly affixing the at least one metal fret to the metal spacer.

12. The method of claim 11 wherein directly affixing the at least one metal fret to the metal spacer comprises laser welding the at least one metal fret to the metal spacer.

13. The method of claim 11 wherein disposing at least one metal fret amongst the plurality of keycaps comprises disposing a plurality of the metal frets amongst the plurality of keycaps to thereby delineate corresponding rows of keycaps.

14. The method of claim 11 wherein disposing at least one metal fret amongst a plurality of keycaps on a frontside of a keypad frame comprises registering at least one registration component on the metal fret with a corresponding registration component-receiving opening formed in the keypad frame.

15. The method of claim 11 wherein disposing the metal spacer on the backside of the keypad frame comprises registering a plurality of registration components on the keypad frame with corresponding registration component-receiving openings formed in the metal spacer.