Abstract: A pivotal rotation angle limiting apparatus includes a supporting seat, a pivot shaft and a linking element. The supporting seat includes a shaft hole, an axially-extended opening connected to the shaft hole and a first connecting portion. The pivot shaft includes a second connecting portion projected from the shaft hole of the supporting seat. The linking element includes a pivot portion and a slide-guided portion, wherein the pivot portion is engaged to the first connecting portion of the supporting seat, the slide-guided portion is engaged to the second connecting portion of the pivot shaft and has a length less than a diameter of the pivot shaft, and the second connecting portion of the pivot shaft is moved along the slide-guided portion and stopped by ends of the slide-guided portion when the pivot shaft is rotated, so that the pivot shaft is limited to pivot within a constant angle.

Abstract: A pivot pin structure includes an assembling section formed on a surface of the pivot pin for assembling with at least one bridge member. The bridge member has a pivot section, which rotatably encloses the assembling section of the pivot pin. On the assembling section are disposed multiple ridge sections and valley sections non-parallel to the axis of the pivot pin. The ridge sections and valley sections are formed in a cross-sectional direction of the pivot pin normal to or approximately normal to the axis of the pivot pin and continuously arranged on the surface thereof. By means of the ridge sections and valley sections of the assembling section, the pivot pin can be assembled with the bridge member in an interference-fit manner to naturally provide a guide and restriction effect and lubricant-reserving effect. Therefore, the bridge member is restricted to only rotate around the pivot pin without axially displacing.

Abstract: A slide cover linking mechanism with both push aid effect and end buffering effect includes: a seat body having a receiving space and at least one first slide guide section, at least one second slide guide section with a middle turning section being disposed in the receiving space; a slide seat slidable along the first slide guide sections and formed with a receiving recess in which a third slide guide section is disposed; at least one first elastic member two ends of which are respectively pivotally connected in the receiving space and with a middle section of the slide seat; and at least one second elastic member two ends of which are respectively connected in the receiving recess and with a slide guide member slidable within the third slide guide section. A movable member movable along the second slide guide section is pivotally connected on the slide guide member.

Abstract: A slide cover stabilization/synchronization mechanism includes a slide seat, a base seat and two elastic abutment assemblies. Two slide guide sections, which can be guide rails, are disposed on two lateral sides of the slide seat in parallel to each other. Two holding sections are disposed on two lateral sides of the base seat for fitting with the slide guide sections. The elastic abutment assemblies are respectively disposed on the each holding section. The elastic abutment assemblies respectively at least partially elastically abut against the slide guide sections directly or indirectly. Accordingly, the base seat can be stably and smoothly slid along the slide guide sections without deflection.

Abstract: A relative displacement device with both slight push force and strong elastic pull force includes two displacement members displaceable relative to each other. The displacement members are respectively formed with two turning displacement paths, which turn from a relative displacement direction in different directions. During displacement travel of the displacement members, the turning displacement paths intersect each other at different points as elastic pull points. Each turning displacement path has two path terminals and a turning point. The displacement reference line of the path terminals of one turning displacement path coincides with the displacement reference line of the turning point of the other turning displacement path. A first end of an elastic member is slidably pivotally positioned at the elastic pull point as an elastic pull end, while a second end of the elastic member is pivotally fixed at a fixed point of one displacement member as a fixed end.