Collapsible lockable support frame assembly and locking mechanism used therein

A collapsible lockable support frame assembly pivotally connected to a stand with at least one pivot shaft and biasable relative to said stand between a non-operative horizontal position and an operative vertical position, comprising:

• a support frame, said support frame comprising two sliding rails arranged in parallel at two opposite lateral sides thereof;
• a slide holder coupled to and movable along said sliding rails of said support frame, said slide holder comprising a positioning rod and a stop edge disposed at a back side thereof;
• and
• a locking mechanism, said locking mechanism comprising a casing affixed to said support frame, an upper stop member and a lower stop member, said upper stop member having pivot connection means disposed at a top side thereof and pivotally swingingly connected to said casing, said lower stop member having pivot connection means disposed at a top side thereof and pivotally connected to said casing below an elevation of said upper stop member;
• wherein when said support frame is rotated from said operative vertical position to said non-operative horizontal position, said upper stop member and said lower stop member are forced by gravity thereof to turn out of said casing so that said upper stop member stops said positioning rod to lock said slide holder and said stop edge is stopped against said lower stop member to prohibit said slide holder from an inward displacement.

A collapsible lockable support frame assembly pivotally connected to a stand with at least one pivot shaft and biasable relative to said stand between a non-operative horizontal position and an operative vertical position, comprising:

• a support frame, said support frame comprising two sliding rails arranged in parallel at two opposite lateral sides thereof;
• a slide holder coupled to and movable along said sliding rails of said support frame, said slide holder comprising a stop edge disposed at a back side thereof;
• and
• a locking mechanism, said locking mechanism comprising a casing affixed to said support frame, an upper stop member and a lower stop member, said upper stop member having pivot connection means disposed at a top side thereof and pivotally swingingly connected to said casing, said lower stop member having pivot connection means disposed at a top side thereof and pivotally connected to said casing below an elevation of said upper stop member;
• wherein when said support frame is rotated from said operative vertical position to said non-operative horizontal position, said upper stop member and said lower stop member are forced by gravity thereof to turn out of said casing so that said stop edge stops said lower stop member to prohibit said slide holder from an inward displacement.

A locking mechanism for a flat panel display system, comprising:

• a casing located in a flat panel display system;
• an upper stop member, said upper stop member having pivot connection means disposed at a top side thereof and pivotally swingingly connected to said casing;
• and
• a lower stop member, said lower stop member having pivot connection means disposed at a top side thereof and pivotally connected to said casing below an elevation of said upper stop member;
• wherein when said casing is rotated, said upper stop member and said lower stop member are forced by gravity thereof to turn out of said casing to provide a position limit effect;
• wherein said casing has a top block located on a top side thereof and adapted to stop said upper stop member when said upper stop member is turned out of said casing.