Leveled touchsurface with planar translational responsiveness to vertical travel

• US 8,847,890 B2
• Filed: 08/04/2011
• Issued: 09/30/2014
• Est. Priority Date: 01/04/2011
• Status: Active Grant

• Current Assignee: Synaptics Incorporated
• Original Assignee: Synaptics Incorporated
• Inventors: Peterson, Cody G., Krumpelman, Douglas M., Levin, Michael D.
• Primary Examiner(s): Bolotin, Dmitriy
• Application Number:
  US13/198,610
• Publication Number:
  US 20120268384A1
• Time in Patent Office: 1,153 Days
• Field of Search: 345156-184, 200/5.A, 200341-345, 335/202, 335205-207, 341/22, 341/27, 341/32, 341/34, 400450-496
• US Class Current: 345/168
• CPC Class Codes: H01H 13/85 characterised by tactile feedback features
• CPC Class Codes: H01H 2215/042 Permanent magnets
• CPC Class Codes: H01H 2221/04 magnetic
• CPC Class Codes: H01H 2221/058 to avoid tilting or skewing of contact area or actuator
• CPC Class Codes: H01H 2227/036 Minimise height

Abstract

Described herein are techniques related to a leveled touchsurface with planar translational responsiveness to vertical travel. Examples of a touchsurface include a key of a keyboard, touchpad of a laptop, or a touchscreen of a smartphone or tablet computer. With the techniques described herein, the touchsurface is constrained to remain in a level orientation while a user presses the touchsurface like a button or key. Also, with the techniques described herein, a planar-translation-effecting mechanism imparts a planar translation to the touchsurface while it travels vertically (e.g., downward) as the user presses the touchsurface. This Abstract is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims.

Claims

1. A keyboard comprising:

a plurality of keycaps;

a keyguide configured to guide keycap motion, the keyguide comprising;

a plurality of combined leveling and planar-translation-effecting (CLPTE) mechanisms, each CLPTE mechanism of the plurality of CLPTE mechanisms associated with a keycap of the plurality of keycaps, each CLPTE mechanism configured to define a planar translation component of an associated path travelled by the associated keycap in response to press input applied to the associated keycap by a user, and each CLPTE mechanism further configured to keep the associated keycap substantially level as the associated keycap travels along the associated path;

a plurality of ready/return mechanisms, each ready/return mechanism of the plurality of ready/return mechanisms corresponding with a keycap of the plurality of keycaps, each ready/return mechanism comprising a first component attached to the corresponding keycap and a second component attached to the keyguide proximate to the CLPTE mechanism associated with the corresponding keycap, wherein the first component and the second component of each ready/return mechanism utilize non-contact forces to maintain the corresponding keycap in an unpressed position when not pressed and to return the corresponding keycap to the unpressed position in response to a release of the press input; and

a key-retraction system configured to retract the plurality of keycaps into a corresponding plurality of keyholes.

2. The keyboard of claim 1, wherein the first and second components of each ready/return mechanism is configured to utilize non-contact forces by utilizing magnetic forces.

3. The keyboard of claim 1, wherein each CLPTE mechanism of the plurality of CLPTE mechanisms comprises multiple inclined surfaces configured to contact multiple inclined features on the associated keycap and form multiple slidable interfaces between the keyguide and the associated keycap.

4. The keyboard of claim 1, wherein each CLPTE mechanism of the plurality of CLPTE mechanisms comprises multiple linkages configured to be rotatably attached to multiple attachment locations on the associated keycap and form multiple rotatable interfaces between the keyguide and the associated keycap.

5. The keyboard of claim 1, wherein a first keycap of the plurality of keycaps has an associated path that differs from the associated path of a second keycap of the plurality of keycaps.

6. The keyboard of claim 5, wherein the associated path of the first keycap differs from the associated path of the second keycap in an amount of planar translation.

7. The keyboard of claim 5, further comprising a base, wherein the associated path of the first keycap differs from the associated path of the second keycap in a path angle relative to the base.

8. The keyboard of claim 1, further comprising a base, wherein a first keycap of the plurality of keycaps has an associate path with an amount of planar translation equivalent to that of a linear path forming an angle with the base no less than thirty-five degrees and no more than sixty-five degrees.

9. The keyboard of claim 8, wherein the associated path of the first keycap is linear.

10. The keyboard of claim 1, wherein the keyboard is part of a human-machine interaction (HMI) device with a lid opposite the keyboard, and wherein the key-retraction system is configured to retract the plurality of keycaps in response to a closure of the lid.

11. A key assembly comprising

a keycap;

a combined leveling and planar-translation-effecting (CLPTE) mechanism operatively coupled to the keycap, wherein the CLPTE mechanism defines a planar translation component of a path travelled by the keycap in response to a press applied to the keycap by a user, and wherein the CLPTE mechanism is configured to keep the keycap substantially level as the keycap travels along the path in response to the press;

a ready/return mechanism operatively associated with the keycap, the ready/return mechanism configured to maintain the keycap in an unpressed position and to return the keycap to the unpressed position in response to a release of the press, wherein the ready/return mechanism does not comprise an elastomer; and

a key-retraction system configured to retract the keycap into a keyhole.

12. The key assembly of claim 11, wherein the ready/return mechanism comprises magnetic material.

13. The key assembly of claim 11, wherein the keycap is coupled to the CLPTE mechanism at multiple coupling interfaces having relative translational degrees of freedom.

14. The key assembly of claim 11, wherein the CLPTE mechanism comprises a plurality of ramps disposed proximate to a perimeter of the keycap, and wherein the plurality of ramps comprise the multiple coupling interfaces having relative translational degrees of freedom.

15. The key assembly of claim 11, wherein the keycap is coupled to the CLPTE mechanism at multiple coupling interfaces having relative rotational degrees of freedom.

16. The keyboard of claim 11, further comprising a base, wherein the keycap has an associate path with an amount of planar translation equivalent to that of a linear path forming an angle with the base no less than thirty-five degrees and no more than sixty-five degrees.

17. A key assembly comprising

a keycap having an exterior face configured to be pressed by a user and an interior face comprising a first plurality of ramp features;

a key guide comprising a second plurality of ramp features configured to contact the first plurality of ramp features, such that the first plurality of ramp features and the second plurality of ramp features together define a planar translation component of a path travelled by the keycap in response to a press applied to the keycap by a user;

a tactile feedback mechanism operatively associated with the keycap, the tactile feedback mechanism configured to provide a resisting force in response to the press; and

a key-retraction system configured to retract the keycap into a keyhole.

18. The key assembly of claim 17, wherein the tactile feedback mechanism is further configured to provide a return force to the keycap to return the keycap to the unpressed position in response to a release of the press.

19. The key assembly of claim 18, wherein the tactile feedback mechanism comprises magnetic material, and the resisting and return forces are based on magnetic forces.

20. The key assembly of claim 18, wherein the tactile feedback mechanism comprises an elastomeric protrusion configured to buckle as the keycap moves along the path in response to the press.

21. The key assembly of claim 18, wherein the first and second pluralities of ramp features are configured to keep the keycap substantially level as the keycap travels along the path in response to the press.

22. The keyboard of claim 17, further comprising a base, wherein the keycap has an associate path with an amount of planar translation equivalent to that of a linear path forming an angle with the base no less than thirty-five degrees and no more than sixty-five degrees.