Patent ID: 6875039

Claim:
A coupling structure on an accessory device coupleable to another coupling structure of a mobile device, the coupling structure for the accessory device comprising: an insulative body including a platform having a length and a width, and a back edge and a front edge, wherein with reference to the mobile device being coupled to the accessory device, the front edge is proximate to a front panel of the mobile device where a display of the mobile device is provided; a first latch member extending from the insulative body to engage a first aperture of the coupling structure on the mobile device; a second latch member extending from the insulative body to engage a second aperture of the coupling structure on the mobile device; a plurality of contact elements extending from the insulative body to mate with corresponding contacts on the coupling structure of the mobile device; wherein the first latch member extends from the insulative body at a first position that is spaced a first distance from the front edge of the insulative body, the second latch member extends from the insulative body at a second position that is spaced the first distance from the front edge of the insulative body, wherein the first latch member is configured to bend and bias by making contact with the coupling structure of the mobile device in order to engage the first aperture and create a first contact force, and the second latch member is configured to bend and bias by making contact with the coupling structure of the mobile device in order to engage the second aperture and create a second contact force, and wherein the plurality of contacts extend from the insulative body at a third position that is spaced a second distance from the front edge of the insulative body, the plurality of contacts being positioned to engage the corresponding contacts on the coupling structure of the mobile device and create a set of third contact forces corresponding to each of the plurality of contacts mating with one of the corresponding contacts on the coupling structure; and wherein the improvement comprises: the first pair of forces are each directed in a lengthwise direction of the first latch member and the second latch member respectively when the first latch member and the second latch member are being made to bend and bias by making contact with the surface of the second coupling structure; and the second distance being less than the first distance, so that the first contact force and the second contact force are offset from the third set of contact forces with respect to the front edge of the insulative body, so that a moment is created by the first contact force, the second contact force, and the set of third contact forces, wherein the moment is in a direction of maintaining the coupling structure of the accessory device coupled to the coupling structure of the mobile device when the accessory device and the mobile device are coupled to one another.