A balance system used with a door of a cupboard comprises a transmission shaft, a first pulley on the transmission shaft, and a balance component. The first pulley is connected to a door belt, one end of the door belt is secured to the first pulley, and the other end of the belt is connected to the door. The balance component comprises a balancing member, a balancing belt and a second pulley on the transmission shaft. One end of the balancing belt is connected to the second pulley, and the other end of the balancing belt is connected to the balancing member, such that the balancing member is hung on the second pulley. The first pulley and the second pulley rotate synchronously, and the door belt and the balancing belt are wound oppositely. With the balance system, a small driving force can open/close the door.

A balance system used with a door of a cupboard comprises a transmission shaft, a first pulley on the transmission shaft, and a balance component. The first pulley is connected to a door belt, one end of the door belt is secured to the first pulley, and the other end of the belt is connected to the door. The balance component comprises a balancing member, a balancing belt and a second pulley on the transmission shaft. One end of the balancing belt is connected to the second pulley, and the other end of the balancing belt is connected to the balancing member, such that the balancing member is hung on the second pulley. The first pulley and the second pulley rotate synchronously, and the door belt and the balancing belt are wound oppositely. With the balance system, a small driving force can open/close the door.

An access panel for a horizontal opening, the access panel (11) comprises a parallel array (12) of members (14, 15, 16) and a lateral extent (W) of the array (12) corresponding to a lateral extend (D) of the opening between first (17) and second (18) end members of the array (12) defining a length (L) of the panel (12). At least two pantograph units (20, 21) extend between the first (17) and second (18) end members and each member (14-16, etc.) in the parallel array (12) is pivotably linked to each pantograph unit. The members (14, 15, 16 etc) and units (20, 21) permit the panel (11) to function as a planar structure and enable the length (L) of the panel (11) to be varied between a minimum length (L1) and a maximum length (L2) and an intermediate configuration having a length between the minimum and maximum lengths (L1, L2).

A security window applied to a single window is applied to a previously installed single window so as to block an open space of the window and prevent entry by strangers and a person inside from having a falling accident. The security window can be separated from within a room as necessary, and thus movement of an object or emergency escape is facilitated. Meanwhile, the security window cannot be separated from outside the room, and thus intrusion by persons with malicious intent can be prevented from the onset.

A burglar trapping system includes a grill assembly having a collapsible grill door adapted to be operated in a collapsed condition and an expanded condition and a motor adapted to operate the collapsible grill door. A sensing module is configured to detect a pressure applied on an object and a communication unit is configured to receive the detected pressure from the plurality of sensors and/or a triggering input from a remote electronic device and generate an input based on one of the detected pressure and the triggering input. A control unit in communication with the communication unit is configured to receive the input from the communication unit and operate the motor to move the collapsible grill door in the expanded condition.

A modular livestock fencing system includes a plurality of collapsible modular fence units configured to house and control egress for livestock. Each collapsible modular fence includes two posts perpendicular to the ground and a plurality of rotatably supporting members connecting the two posts such that each rotatable supporting member can be rotated in a scissor motion to bring the two posts toward one another into a fully collapsed position where the posts are substantially in contact with one another or an expanded configuration where the posts are displaced from one another in a fully extended position. The system may include a locking mechanism which locks the supporting members at the fully extended position. The system includes a plurality of connection elements located on the two posts that are configured to connect one modular fence unit with one or more additional modular fence units.

A cover for covering an opening defined in a surface, the opening defined between a first edge and a second edge, and defining an opening width therebetween, shorter than a length of the opening, the cover having a cover width and configured to be supported, in use, at the first edge and the second edge of the opening when the cover width is parallel to the opening width, wherein the cover width is adjustable from a first cover width to a second cover width, and wherein the cover is configured to maintain the cover width at the second cover width, in use.