Reinforced key assembly
AssigneeApple Inc.
InventorsAlex J. Lehmann, Kenneth M. Silz, Paul X. Wang, Qiliang Xu, Zheng Gao
Life of this patent
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Abstract
Embodiments are directed to a dome switch and methods related to the use thereto. In one aspect, an embodiment includes a key cap. The embodiment may further include a domed structure having upper and lower portions. The domed structure may be configured to deform in response to an input force received at the upper portion by the key cap. The embodiment may further include a collar affixed to the lower portion and extending toward the key cap. The collar may resist deformation of the domed surface.
Claims24
A dome switch, comprising:
- a base;
- a dome disposed over the base and having a substantially circular perimeter;
- a collar surrounding the dome and connected along the substantially circular perimeter and having a raised portion extending from the base;
- a key cap positioned above the dome;
- and
- a sensing structure configured to detect a collapse of the dome caused by a depression of the key cap, wherein
- the raised portion limits a downward motion of the key cap when the dome is collapsed.
A method of operating a dome switch, comprising:
- receiving a first displacement at a key cap positioned above a dome, thereby buckling the dome;
- detecting a contact between an inner portion of the dome and a base portion disposed below the dome caused by the first displacement of the key cap;
- generating a first user input signal in response to detecting the contact;
- receiving a second displacement at the key cap that is greater than the first displacement;
- detecting the second displacement of the key cap;
- resisting the second displacement using a raised portion of a collar that is connected to a substantially circular perimeter of the dome;
- and
- generating a second user input signal in response to detecting the second displacement.
A dome switch, comprising:
- a base;
- a key cap positioned above the base;
- a dome having:
- an upper portion positioned below the key cap;
- and
- a lower portion positioned on the base and defining a substantially circular perimeter;
- a collar positioned about the substantially circular perimeter and having a raised portion that extends toward an underside of the key cap;
- and
- a sensing element disposed on the base and configured to detect contact of the upper portion with the base, wherein
- the raised portion limits a downward motion of the key cap.
Dependencies are inferred from the claim text.