Apple is working on a hinge mechanism for the iPad Keyboard box, which can be folded more smoothly than standard components, and a new way to provide adjustable tactile key feedback. Apple’s patent for an accessory device called & quot; portable electronic device & quot; describes in detail a tablet computer keyboard box and provides a new way to adjust the viewing position. Although traditional hinges rely on engagement between the shaft and the clamp, the patent outlines a way for different components to mimic the function of a traditional hinge assembly. < / P > < p > for example, a new hinge assembly can use two hinge assemblies, which are connected by joints and are generally flat. This is in contrast to traditional hinges, which are usually circular and friction based. Apple said in the patent: & quot; when transitioning from storage configuration to deployment configuration, the first hinge component rotates around the pivot point, but remains flat overall. However, rotation of the first hinge assembly causes the second hinge assembly to move out of the flat configuration and lift the second hinge assembly into the support configuration of the panel. “< / P > < p > Apple believes that this type of hinge component has advantages over traditional hinge components. First, flat hinges are less dependent on the size of the components themselves, which means that keyboard devices can be made thinner and smoother. The patent also states that the flat hinge assembly can be better hidden when folded. Interestingly, the patent image also shows the space for an extra input device & quot; that can add a touch pad or a row of dynamic input keys to the standard QWERTY keyboard layout. < / P > < p > in a separate patent called & quot; adjustable feedback keyboard & quot;, apple explored how to add user input response elements to the keyboard. The patent outlines various internal components that provide variable tactile or acoustic feedback when a user presses a key. But the patent does not just provide a single type of key feedback, but details several interesting ways to adjust tactile input. < / P > < p > wherein, the patent states that the user can adjust the volume and tactile feedback of the keyboard. Typists who prefer a louder, more click experience can choose, while users who prefer to type more quietly can adjust their feedback accordingly. The patent also states that the key can use tactile feedback, such as & quot; texture & quot; feel or feedback bulge, to provide homing function. This will be similar to the little bumps that usually exist on F and j keyboards. < / P > < p > the rest of the patent details a system that can detect the user’s input force, perhaps eliminating erroneous inputs or duplicate keystrokes. Although not strictly an iPad related patent, these methods may be particularly useful for tablet keyboard cases due to the lack of satisfactory tactile feedback. Spontaneous combustion at a Guangzhou Motor vehicle intersection and other traffic lights in Shenzhen