Abstract: A hinge assembly includes a cam (13), a follower (14), a first spring (12), a control member (17) and a second spring (16). The cam has a first cam surface (135) and a second cam surface (136). The follower has a third cam surface (141) engaging with the first cam surface. The first spring provides an elastic force causing the cam surface of the cam and the third cam surface of the follower to resist each other. The control member has a fourth cam surface engaging with the second cam surface of the cam. The second spring is positioned between the control member and the follower. The control member is movable to push the cam to rotate to realize the first cam surface of the cam to rotate relative to the third cam surface of the follower.

Abstract: A battery cover mechanism used in a portable electronic device includes a housing, a cover and an operating unit. The housing defines a receiving groove therein for receiving a battery. The cover is assembled on the housing to cover the receiving groove. The operating unit is mounted on the cover and includes a movable operating member and at least one movable retaining member driven by the operating member. The operating member is moved to fix one portion of the cover on the housing and the retaining member is driven to move perpendicularly to the movement of the operating member to fix another portion of the cover on the housing.

Abstract: A cover latch for a portable electronic device includes a housing member forming two latching protrusions, a cover member, a mounting panel secured to the cover member, two latching members pivotally positioned on the mounting panel, and a contact member slidably positioned on the mounting panel. Each of the latching members includes a latching portion for interlocking with one of the latching protrusions. The contact member slides relative to the mounting panel to pivot the latching members to release the interlocking of the latching portions and the latching protrusions.

Abstract: A battery cover mechanism used in a portable electronic device includes a housing defining a receiving groove therein for receiving a battery, an elastic member mounted on the housing and a cover corresponding to the housing. The elastic member is releasably held by the cover such that the cover can be mounted on the housing for covering the receiving groove, and the cover can be detached from the housing when the elastic member is released from the cover.

Abstract: A battery cover mechanism used in a portable electronic device includes a housing, a cover and an operating member. The housing defines a receiving groove therein for receiving a battery. The cover corresponds to the housing and is movably mounted on the housing. The operating member is movably mounted on the housing. The operating member is held on the housing to hold the cover such that the cover is closed to cover the receiving groove, and the operating member is moved to drive the cover to move such that the cover is opened.

Abstract: A latch mechanism used in a portable electronic device includes a housing member, a cover member, and a latching assembly. The cover member forms a claw, and the housing member defines a positioning hole. The latching assembly can be slidably mounted in the housing member and slides between a latched position and a released position. In the latched position, the cover member latches to the housing member. The latched position is maintained by entry of the claw into the positioning hole. In the released position, the cover member releases from the housing member, and the claw is released out of the positioning hole. During the sliding process, the latching assembly abuts and directly raises the cover member relative to the housing member from the latched position to the released position.

Abstract: A slide mechanism used in a mobile device includes a main plate, a slide plate, at least one undeformable slider, and at least one guide. The slide plate is installed on the main plate and slidable relative to the main plate. The slider is securely attached to the slide plate, and the guide is securely attached to the main plate, deformably moving the slider along. When the slide plate slides along the main plate, the slider compresses the guide, thereby generating deformation of the guide and sliding the slide plate along the main plate.