Patent ID: 8744535

Claim:
A mobile device comprising: a navigation tool that receives optical input, the navigation tool having a top portion, a bottom portion, and a flexible circuit, the flexible circuit having a first end proximate to the top portion and a second end that extends in a lateral direction away from the top portion; a navigation tool holder comprising: a bottom holder including a lower clamp portion and a switch adapted for engagement by the navigation tool; a top holder configured to matingly engage the bottom holder to secure the navigation tool in x-,y-, and z-directions, the top holder including an upper clamp portion that matingly engages the lower clamp portion to define a slot that receives the flexible circuit therebetween, such that the flexible circuit is frictionally engaged at the slot by the upper clamp portion and the lower clamp portion, the flexible circuit extending outside the navigational tool holder at a location of engagement by the upper clamp portion and the lower clamp portion, the location of engagement defining a bending point for the flexible circuit when the navigation tool is vertically displaced within the navigation tool holder to engage the switch with the bottom portion, the top holder further including an aperture positioned to receive the top portion of the navigation tool therethrough; and a spacer provided at the aperture, the spacer being configured to constrain the vertically displaced navigation tool.