The present invention discloses a foldable mechanism and an infant carrier thereof. The foldable mechanism includes a first mount, a second mount and a locking member movably disposed between the first mount and the second mount. The first mount is pivotally connected to the second mount. The infant carrier is locked in the folded state when the first mount rotates to a first rotating position relative to the second mount. The infant carrier is locked in the expanded state when the first mount rotates to a second rotating position relative to the second mount. The first mount is locked at the first rotating position or the second rotating position via movement of the locking member, so as to make the foldable mechanism have a simple folding mechanical design and improve folding stability of the foldable mechanism.

A rotation joint structure includes a fixed joint, a movable joint, a first limit member, and a second limit member. The fixed base has a locking groove. The movable joint is pivotally connected with the fixed joint. The movable joint has a first slideway and a second slideway connected to each other. The first limit member is movably mounted in the first slideway. The second limit member is movably mounted in the second slideway. When the second limit member is locked in the locking groove, and the first limit member stops the second limit member, the movable joint is locked and cannot be rotated. Thus, the movable joint is disposed at a two-stage locking state.

A foldable mechanism is applied to locking an infant carrier and includes first and second mounts and a locking member. The second mount is pivoted to the first mount and has first and second mating portions. The infant carrier is locked in the folded state when the first mount rotates to a first rotating position, and is locked in the expanded state when the first mount rotates to a second rotating position. The locking member is movably disposed between the first and second mounts and has a positioning portion and a locking portion. The positioning portion is engaged with the first mating portion to lock the first mount at the first rotating position. The locking portion is engaged with the second mating portion to lock the first mount at the second rotating position. A depth of the first mating portion is shallower than a depth of the second mating portion.

A foldable mechanism is applied to locking an infant carrier and includes first and second mounts and a locking member. The second mount is pivoted to the first mount and has first and second mating portions. The infant carrier is locked in the folded state when the first mount rotates to a first rotating position, and is locked in the expanded state when the first mount rotates to a second rotating position. The locking member is movably disposed between the first and second mounts and has a positioning portion and a locking portion. The positioning portion is engaged with the first mating portion to lock the first mount at the first rotating position. The locking portion is engaged with the second mating portion to lock the first mount at the second rotating position. A depth of the first mating portion is shallower than a depth of the second mating portion.

A rotation joint structure includes a fixed joint, a movable joint, a first limit member, and a second limit member. The fixed base has a locking groove. The movable joint is pivotally connected with the fixed joint. The movable joint has a first slideway and a second slideway connected to each other. The first limit member is movably mounted in the first slideway. The second limit member is movably mounted in the second slideway. When the second limit member is locked in the locking groove, and the first limit member stops the second limit member, the movable joint is locked and cannot be rotated. Thus, the movable joint is disposed at a two-stage locking state.

A chair backrest swing structure includes a chassis connecting seat, a backframe connecting seat and an elastic buffer and reset member. The chassis connecting seat is configured to be cooperatively mounted with a chassis. The backframe connecting seat is configured to be cooperatively mounted with a backframe. The backframe connecting seat is rotatably cooperated with the chassis connecting seat. The elastic buffer and reset member is configured to enable that the backframe connecting seat may implement buffer and reset when swung left and right on the chassis connecting seat.

The present invention discloses a foldable mechanism and an infant carrier thereof. The foldable mechanism includes a first mount, a second mount and a locking member movably disposed between the first mount and the second mount. The first mount is pivotally connected to the second mount. The infant carrier is locked in the folded state when the first mount rotates to a first rotating position relative to the second mount. The infant carrier is locked in the expanded state when the first mount rotates to a second rotating position relative to the second mount. The first mount is locked at the first rotating position or the second rotating position via movement of the locking member, so as to make the foldable mechanism have a simple folding mechanical design and improve folding stability of the foldable mechanism.

A resistive motion support mechanism joined to a mounting surface and to a base shaft for providing resistive support to the mounting surface as the mounting surface undergoes one or both of rotational and tilt movement relative to the base, the motion support mechanism including a support bearing connected to the mounting surface and to the base shaft which permits one or both of tilting and rotational motion of the mounting surface relative to the base; a pivot ball functionally attached to a portion of the base shaft; a resilient ring within a housing circumscribing the base shaft such that the resilient member is compressed between the housing and the base shaft by the relative movement between the base shaft and the mounting surface to provide a resistive force on the base shaft to resist the one or both of rotational and tilt movement; and, various means for varying the resistive force.

An office chair comprises a seat element (3) mounted movably on a fixed support element (1) and a back support element (2). The arrangement simultaneously allows the seat element (3) to move and tilt backwards when the user leans backwards. The seat element (3) carries the chair seating panel (4) in such a way that when the user leans to a side, said chair seating panel (4) tilts to the same side according to the user's movement and independently of the chair's back element (2).

An office chair comprises a seat element (3) mounted movably on a fixed support element (1) and a back support element (2). The arrangement simultaneously allows the seat element (3) to move and tilt backwards when the user leans backwards. The seat element (3) carries the chair seating panel (4) in such a way that when the user leans to a side, said chair seating panel (4) tilts to the same side according to the user's movement and independently of the chair's back element (2).