Ruggedized, water sealed, security-enhanced touchpad assembly

• US 6,784,875 B2
• Filed: 01/11/2002
• Issued: 08/31/2004
• Est. Priority Date: 01/11/2002
• Status: Expired due to Fees

• Current Assignee: Symbol Technologies, Inc. (Zebra Technologies Corporation)
• Original Assignee: Symbol Technologies, Inc. (Zebra Technologies Corporation)
• Inventors: Yuen, Siltex Peter
• Primary Examiner(s): Shankar, Vijay
• Assistant Examiner(s): Patel, Nitin
• Application Number:
  US10/044,095
• Publication Number:
  US 20030132917A1
• Time in Patent Office: 963 Days
• Field of Search: 345/173, 345/174, 345/175, 345/176, 345/177, 345/178, 178/18-1-, 178/18.03, 178/18.04, 178/18.05, 178/18.06, 178/18.07, 178/18.08, 178/18.09, 178/18.1, 178/18.11, 178/19.01
• US Class Current: 345/173
• CPC Class Codes: G06F 3/03547 Touch pads, in which fingers can move on a surface

Abstract

A touchpad assembly is ruggedizing and sealed against moisture. The assembly includes a touchpad that receives a user-generated data signal that is cable-coupled to a printed circuit board assembly (PCBA), which components are disposed upon a support lens. A shield over-covers the touchpad assembly but has an through-opening providing user-access to the touchpad. An anti-theft mechanism secures the shield to the PCBA, and a security chamber space is sealingly defined between the shield, PCBA, and the support lens. The security chamber space is secured with injected resin, into which the anti-theft latch is thereby molded. A cable opening in the support lens is water sealed using double-sided adhesive tape or the like.

Claims

1. An apparatus for ruggedizing and securing a touchpad assembly comprising:

a touchpad having spaced-apart first and second surfaces, to receive a data signal from a user and to couple said signal to a cable;

a printed circuit board assembly (PCBA) having spaced-apart first and second surfaces, said PCBA coupled to said cable to receive said data signal from said touchpad;

a support having a first surface upon which said touchpad and said PCBA are disposed;

a shield having spaced-apart first and second surfaces, said shield over-covering said touchpad, said cable, and said PCBA, and defining a through opening in said first surface overlying and permitting access to said touchpad;

an anti-theft latch securing said shield to said PCBA to enhance at least one of water-proofing and theft-vulnerability of said apparatus, wherein said anti-theft latch comprises a spring.

3. The apparatus of claim 1, wherein said spring comprises an upper portion, a central portion, and a lower portion, such that said upper portion is coupled to said second surface of said shield, said lower portion is coupled to said first surface of said PCBA, and said central portion extends from said upper portion and angles downward toward said lower portion.

5. The apparatus of claim 1, wherein said seal includes at least one chamber seals to seal and define a security chamber space between portions of said shield, said PCBA, and said support lens.

9. The apparatus of claim 5, wherein said chamber seals comprise a plurality of second chamber seals that lie between said second surface of said PCBA and said first surface of said support.

10. The apparatus of claim 9, wherein said second chamber seals comprise a double-sided adhesive material.

11. The apparatus of claim 10, wherein said adhesive material comprises a gasket.

12. The apparatus of claim 1, wherein said means for securing includes an anti-theft latch.

20. The apparatus of claim 1, further including a shock isolation mounting for said shield, disposed between said second surface of said shield and said first surface of the touchpad;

wherein said shock isolation mounting helps retain said touchpad to said support.

21. The apparatus of claim 1, wherein said support includes optical quality transparent material.

23. The apparatus of claim 1 wherein said shield comprises a metallic material.

24. The apparatus of claim 1, wherein said cable is a flex cable.

35. An apparatus according to claim 1, wherein the support comprises a lens.

2. An apparatus for ruggedizing and securing a touchpad assembly comprising:

a touchpad having spaced-apart first and second surfaces, to receive a data signal from a user and to couple said signal to a cable;

a printed circuit board assembly (PCBA) having spaced-apart first and second surfaces, said PCBA coupled to said cable to receive said data signal from said touchpad;

a support having a first surface upon which said touchpad and said PCBA are disposed;

a shield having spaced-apart first and second surfaces, said shield over-covering said touchpad, said cable, and said PCBA, and defining a through opening in said first surface overlying and permitting access to said touchpad;

an anti-theft latch securing said shield to said PCBA to enhance at least one of water-proofing and theft-vulnerability of said apparatus, wherein said anti-theft latch includes a metallic material.

4. An apparatus for ruggedizing and securing a touchpad assembly comprising:

a touchpad having spaced-apart first and second surfaces, to receive a data signal from a user and to couple said signal to a cable;

a printed circuit board assembly (PCBA) having spaced-apart first and second surfaces, said PCBA coupled to said cable to receive said data signal from said touchpad;

a support having a first surface upon which said touchpad and said PCBA are disposed;

a shield having spaced-apart first and second surfaces, said shield over-covering at least a portion of said touchpad, said cable, and said PCBA, and defining a through opening in said first surface overlying and permitting access to said touchpad; and

a seal coupling said shield to said support and said cable to enhance at least one of water-proofing and theft-vulnerability of said apparatus.

6. The apparatus of claim 4, wherein said chamber seals include a plurality of first chamber seals disposed between the second surface of said shield and the first surface of said support, around a perimeter of said PCBA.

7. The apparatus of claim 6, wherein said first chamber seals comprise adhesive material.

8. The apparatus of claim 7, wherein said adhesive material comprises a gasket.

13. An apparatus for ruggedizing and securing a touchpad assembly comprising:

a touchpad having spaced-apart first and second surfaces, to receive a data signal from a user and to couple said signal to a cable;

a printed circuit board assembly (PCBA) having spaced-apart first and second surfaces, said PCBA coupled to said cable to receive said data signal from said touchpad;

a support having a first surface upon which said touchpad and said PCBA are disposed;

a shield having spaced-apart first and second surfaces, said shield over-covering said touchpad, said cable, and said PCBA, and defining a through opening in said first surface overlying and permitting access to said touchpad;

an anti-theft latch securing said shield to said PCBA to enhance at least one of water-proofing and theft-vulnerability of said apparatus, wherein said shield defines at least one injection port through which encapsulation resin is injectable into said security chamber space; and

wherein said anti-theft latch is molded into said encapsulation resin such that upon setting and curing of said resin, said PCBA is not readily disassembled from said apparatus.

14. The apparatus of claim 13, wherein a set mount of said encapsulation resin is injected into said security chamber space.

15. An apparatus for ruggedizing and securing a touchpad assembly comprising:

a touchpad having spaced-apart first and second surfaces, to receive a data signal from a user and to couple said signal to a cable;

a printed circuit board assembly (PCBA) having spaced-apart first and second surfaces, said PCBA coupled to said cable to receive said data signal from said touchpad;

a support having a first surface upon which said touchpad and said PCBA are disposed;

a shield having spaced-apart first and second surfaces, said shield over-covering said touchpad, said cable, and said PCBA, and defining a through opening in said first surface overlying and permitting access to said touchpad;

an anti-theft latch securing said shield to said PCBA to enhance at least one of water-proofing and theft-vulnerability of said apparatus, wherein a portion of said anti-theft latch is welded to said second surface of said shield.

16. An apparatus for ruggedizing and securing a touchpad assembly comprising:

a touchpad having spaced-apart first and second surfaces, to receive a data signal from a user and to couple said signal to a cable;

a printed circuit board assembly (PCBA) having spaced-apart first and second surfaces, said PCBA coupled to said cable to receive said data signal from said touchpad;

a support having a first surface upon which said touchpad and said PCBA are disposed;

a shield having spaced-apart first and second surfaces, said shield over-covering said touchpad;

said cable, and said PCBA, and defining a through opening in said first surface overlying and permitting access to said touchpad;

an anti-theft latch securing said shield to said PCBA to enhance at least one of water-proofing and theft-vulnerability of said apparatus, wherein said anti-theft latch is electrically coupled to said PCBA.

17. An apparatus for ruggedizing and securing a touchpad assembly comprising:

a touchpad having spaced-apart first and second surfaces, to receive a data signal from a user and to couple said signal to a cable;

a printed circuit board assembly (PCBA) having spaced-apart first and second surfaces, said PCBA coupled to said cable to receive said data signal from said touchpad;

a support having a first surface upon which said touchpad and said PCBA are disposed;

a shield having spaced-apart first and second surfaces, said shield over-covering said touchpad, said cable, and said PCBA, and defining a through opening in said first surface overlying and permitting access to said touchpad;

an anti-theft latch securing said shield to said PCBA to enhance at least one of water-proofing and theft-vulnerability of said apparatus, wherein said anti-theft latch is electrically coupled to said PCBA with electrically conductive double-sided adhesive material.

18. The apparatus of claim 17, wherein said adhesive material comprises a gasket.

19. The apparatus of claim 18, wherein said anti-theft latch is electrically coupled to a ground pad on said first surface of said PCBA.

22. An apparatus for ruggedizing and securing a touchpad assembly comprising:

a touchpad having spaced-apart first and second surfaces, to receive a data signal from a user and to couple said signal to a cable;

a printed circuit board assembly (PCBA) having spaced-apart first and second surfaces, said PCBA coupled to said cable to receive said data signal from said touchpad;

a support including at least one of polycarbonate and glass, the support having a first surface upon which said touchpad and said PCBA are disposed;

a shield having spaced-apart first and second surfaces, said shield over-covering said touchpad, said cable, and said PCBA, and defining a through opening in said first surface overlying and permitting access to said touchpad; and

means for securing said shield to said PCBA to enhance at least one of water-proofing and theft-vulnerability of said apparatus.

25. A method of ruggedizing and securing a touchpad assembly, the method comprising the following steps:

supporting a touchpad and a printed circuit board assembly (PCBA) with a lens, such that the touchpad and PCBA lie on a first surface of the lens;

coupling a cable between the touchpad and the PCBA;

providing a shield having spaced-apart first and second surfaces to cover said touchpad, cable, and PCBA, said shield defining an opening sized to permit accessing said touchpad; and

coupling a seal between said shield and said lens, the seal in contact with said cable, to enhance at least one of water-proofing and theft-vulnerability of the assembly.

26. The method of claim 25, wherein said shield is mounted to said lens.

27. The method of claim 25, further including defining a sealed security chamber space between portions of said shield, said PCBA, and said lens, and at least partially sealing said space with said seal.

28. The method of claim 27, further including sealing a second surface of said shield and a first surface of said lens around a perimeter of said PCBA, at least in part using said seal.

29. The method of claim 27, further including sealing a second surface of the PCBA and a first surface of the lens using at least one second chamber seal disposed between said second surface of said PCBA and said first surface of said lens.

34. The method of claim 25, further including providing a shock isolation mount to retain said touchpad to said lens, said mount being disposed between a second surface of said shield and a first surface of said touchpad.

30. A method of ruggedizing and securing a touchpad assembly, the method comprising:

supporting a touchpad and a printed circuit board assembly (PCBA) with a lens, such that the touchpad and PCBA lie on a first surface of the lens;

coupling a cable between the touchpad and the PCBA;

providing a shield having spaced-apart first and second surfaces to cover said touchpad, cable, and PCBA, said shield defining an opening sized to permit accessing said touchpad;

providing at least one of a water-proofing enhancement mechanism and an anti-theft mechanism, to secure said shield to said PCBA; and

injecting encapsulation resin through an injection port, defined in said shield, into a security chamber space, such that said anti-theft latch is molded into said encapsulation resin and such that upon setting and curing of said resin, said PCBA cannot readily be disassembled.

31. A method of ruggedizing and securing a touchpad assembly, the method comprising the following steps:

supporting a touchpad and a printed circuit board assembly (PCBA) with a lens, such that the touchpad and PCBA lie on a first surface of the lens;

coupling a cable between the touchpad and the PCBA;

providing a shield having spaced-apart first and second surfaces to cover said touchpad, cable, and PCBA, said shield defining an opening sized to permit accessing said touchpad;

providing at least one of a water-proofing enhancement mechanism and an anti-theft mechanism, to secure said shield to said PCBA; and

welding a metallic spring to said shield and to said latch.

32. A method of ruggedizing and securing a touchpad assembly, the method comprising the following steps:

supporting a touchpad and a printed circuit board assembly (PCBA) with a lens, such that the touchpad and PCBA lie on a first surface of the lens;

coupling a cable between the touchpad and the PCBA;

providing a shield having spaced-apart first and second surfaces to cover said touchpad, cable, and PCBA, said shield defining an opening sized to permit accessing said touchpad;

providing at least one of a water-proofing enhancement mechanism and an anti-theft mechanism, to secure said shield to said PCBA; and

electrically coupling said anti-theft latch to said PCBA.

33. The method of claim 32, wherein the step of securing further comprises electrically coupling the anti-theft latch to the PCBA by contact with a ground pad on the first surface of the PCBA.