| 摘要 |
A collapsible key structure for a depression key structure includes a pair of scissors type linkage for supporting the depression key structure. At least one scissors type linkage has a first lever pivotally engaged with a second lever. The first lever has a top end pivotally engaged with depression key structure and a bottom end rotatably and slidably engaged with a base plate. The second lever has a top end rotatably and slidably engaged with the depression key structure and a bottom end forming a rotatable-and-slidable constraint means with the base plate. The rotatable-and-slidable constraint means includes a bordering rail mounted on the base plate, in which the bordering rail has a first and a second sliding surfaces for a first and a second engaging pins at a bottom end of the second lever to slide along, respectively. By providing the present invention, the depression key structure may be moved steadily up or down without drifting sideward. Also, assembly and disassembly of the collapsible key structure can be performed simpler and without much deforming the first and the second levers.
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