Superior usability is provided and the degree of freedom in terms of use is enhanced. A plurality of link members A1 and A2 include at least one of linear edges A12 and A22 at the peripheral edge of a facing surface A10 or A20 that faces in a folded state. At least one of the adjacent link members A1 and A2 is a magnet, and the other is a material attracted by the magnet. A link body A is formed of the link members A1 and A2 that are linked by the attracting force due to the magnetic force of the link members A1 and A2, of which the linear edges A12 and A22 are aligned.

The present invention relates to a metal-sheet board or blackboard with magnetic features having two or three movements, which plots and represents reality in four dimensions (horizontal, vertical, depth and time) and which describes reality objectively, in which a T-shaped ruler is moved on a rail along the horizontal or X axis by a digital stepper motor controlled by a driver and software on the computer (horizontal movement). Furthermore, a tool truck surrounding the T-shaped ruler moves along the entire length (vertical movement) or Y axis thereof, actuated by a digital stepper motor controlled by a driver, which is in turn controlled by software on the computer, with these two movements controlled by mathematical speed and acceleration functions.

A magnetic display unit includes: a display layer; a magnetic layer located behind the display layer; and a quick-release mechanism including an activator, wherein the quick-release mechanism is adapted to increase the distance between the magnetic layer and the display layer such that, when activated by the activator, the quick-release mechanism causes any magnets located along the display layer to be released from the display layer.

Superior usability is provided and the degree of freedom in terms of use is enhanced.

A plurality of link members A1 and A2 include at least one of linear edges A12 and A22 at the peripheral edge of a facing surface A10 or A20 that faces in a folded state. At least one of the adjacent link members A1 and A2 is a magnet, and the other is a material attracted by the magnet. A link body A is formed of the link members A1 and A2 that are linked by the attracting force due to the magnetic force of the link members A1 and A2, of which the linear edges A12 and A22 are aligned.

Superior usability is provided and the degree of freedom in terms of use is enhanced.

A plurality of link members A1 and A2 include at least one of linear edges A12 and A22 at the peripheral edge of a facing surface A10 or A20 that faces in a folded state. At least one of the adjacent link members A1 and A2 is a magnet, and the other is a material attracted by the magnet. A link body A is formed of the link members A1 and A2 that are linked by the attracting force due to the magnetic force of the link members A1 and A2, of which the linear edges A12 and A22 are aligned.

A cylindrical winding tool 3 has three elongated members 5 obtained by splitting a cylindrical member in its axial direction into multiple pieces. The elongated members are interconnected in a hinged state in a circumferential direction by the magnet sheet. When the elongated members 5 are to be used, the elongated members 5 are placed in a spread state and arranged on the magnetically-attached object 4. When the elongated members 5 are not used, the elongated members 5 are gathered together in the circumferential direction, abutment sections 5b of the end faces of the adjacent elongated members are brought into abutment on each other and thus the cylindrical winding tool 3 having a required diameter can be formed.

A cylindrical winding tool 3 has three elongated members 5 obtained by splitting a cylindrical member in its axial direction into multiple pieces. The elongated members are interconnected in a hinged state in a circumferential direction by the magnet sheet. When the elongated members 5 are to be used, the elongated members 5 are placed in a spread state and arranged on the magnetically-attached object 4. When the elongated members 5 are not used, the elongated members 5 are gathered together in the circumferential direction, abutment sections 5b of the end faces of the adjacent elongated members are brought into abutment on each other and thus the cylindrical winding tool 3 having a required diameter can be formed.

Disclosed are a method and/or a system of a flippable board. In one aspect, the flippable board includes a track capable of attaching to a surface, a first hinge component and a second hinge component attached to the track, and a frame attached to the first and second hinge components along a first vertical end of the frame. The first and second hinge components allow the frame to rotate between an open position and a closed position. The flippable board further includes an adjustable left magnet and adjustable right magnet attached to the first and/or second hinge component, and at least one metal sleeve attached to a second vertical end of the frame capable of connecting to the left magnet and/or right magnet of a secondary flippable board and/or an adjustable surface magnet in order to secure the flippable board in the open and/or closed position.

Disclosed are a method and/or a system of a flippable board. In one aspect, the flippable board includes a track capable of attaching to a surface, a first hinge component and a second hinge component attached to the track, and a frame attached to the first and second hinge components along a first vertical end of the frame. The first and second hinge components allow the frame to rotate between an open position and a closed position. The flippable board further includes an adjustable left magnet and adjustable right magnet attached to the first and/or second hinge component, and at least one metal sleeve attached to a second vertical end of the frame capable of connecting to the left magnet and/or right magnet of a secondary flippable board and/or an adjustable surface magnet in order to secure the flippable board in the open and/or closed position.