CN206340181U - The expansible multi-media whiteboard of plate face used in teaching - Google Patents

Abstract

The board used in teaching is an expandable multimedia electronic whiteboard. Traditional multimedia electronic whiteboards are slightly longer than tall and nearly square screen panels, while flat and long rectangular screen panels take up a lot of space and are inconvenient for storage and transportation. The utility model consists of a square electronic whiteboard main board (1), the electronic whiteboard main board is installed on a support (2), and a multimedia projector (3) is installed on the support, and the surface of the electronic whiteboard main board is covered There are also square expansion boards, the expansion boards include four square small boards (4), and two square small boards form a group; the square small boards include two triangular boards (5), and the two The triangular boards are connected together through hinges at the right-angled sides, and the apex of one of the triangular boards is connected with the apex of the main board of the electronic whiteboard through a limit ball hinge. The utility model is applied to an expandable multimedia electronic whiteboard used in teaching.

Description

Expandable multimedia electronic whiteboard used in teaching

Technical field:

The utility model relates to an expandable multimedia electronic whiteboard used in teaching.

Background technique:

In the physics teaching of universities, it is necessary to display vivid dynamic pictures of models through multimedia electronic whiteboards. The playback ratio of these pictures is best if you choose a flat, long and wide-ratio display screen, and it is also most suitable for the viewing characteristics of the human eye. However, traditional multimedia electronic whiteboards are slightly longer than tall and nearly square screen panels, while flat and long rectangular screen panels take up a lot of space and are inconvenient for storage and transportation.

Utility model content:

The purpose of the utility model is to provide an expandable multimedia electronic whiteboard used in teaching.

Above-mentioned purpose realizes by following technical scheme:

An expandable multimedia electronic whiteboard used in teaching, which consists of: a square electronic whiteboard mainboard, the electronic whiteboard mainboard is installed on a bracket, a multimedia projector is installed on the bracket, and the electronic whiteboard The surface of the main board of the whiteboard is covered with an expansion board that is also square, and the expansion board includes four small square boards, and two small square boards form a group;

The square small board includes two triangular boards, and the two triangular boards are connected together by hinges at right-angled sides, and the apex of one of the triangular boards is connected with the apex of the main board of the electronic whiteboard by a limit ball hinge , the apex of the other triangular plate is connected with the triangular plate apex ball hinge of the same group of small square plates; the limit ball hinge limits the rotation of the triangular plate around the axis perpendicular to the main board of the electronic whiteboard, and at the same time restricts the plane where the triangular plate and the main board of the electronic whiteboard are located to form a the angle of inclination does not exceed 10 degrees;

The bracket has two extension struts, and the end points of the extension struts have magnets. After the expansion plate is unfolded, the magnets of the extension struts are adsorbed and fixedly connected to the hinge points of the triangular plate.

The board used in the teaching is an expandable multimedia electronic whiteboard, and universal wheels are installed at the lower end of the support.

The beneficial effects of the utility model:

The utility model provides a brand-new expansion mode of the electronic whiteboard, only using ball hinges and hinges, cleverly using the geometric characteristics of the board, and realizing the expansion of the lateral expansion board similar to the slideway without the slideway. The unfolded electronic whiteboard is square, and the whiteboard bracket can be folded and shrunk, and can be stored and transported in a suitcase or other box. The aspect ratio of the unfolded electronic whiteboard is very suitable for the display of wide-screen pictures. In physics teaching, multiple continuous horizontal pictures can be displayed, which greatly facilitates people's observation habits (usually tilted viewing is the most prone to fatigue). The width and height of the utility model can reach 2, and even the main board of the electronic whiteboard can be adjusted to be a rectangular board, thereby increasing the aspect ratio to more than 2.

The unfolding principle of the present utility model is as follows: when unfolding, the square platelets are respectively deployed sideways with the same principle, and the square platelets on the right side are taken as an example for illustration. The two square small boards of the square small board group on the right are arranged up and down, and each apex is connected to the apex of the main board of the electronic whiteboard through a limit ball hinge. The small square board is composed of two triangular boards, and the two triangular boards are connected by a hinge at the diagonal, so that the triangular board can rotate around the diagonal (obviously, the triangular board cannot hit the main board of the electronic whiteboard to rotate). The upper and lower square plates are connected by ball hinges at the vertices, so that the two diagonal vertices of the square plates are finally connected by ball hinges, but one is to limit the connection, so that the square plate and The electronic whiteboard main board can only form a slight tilt angle. When it is necessary to unfold the small square board group on the right side, hold the ball hinge and pull the ball hinge in a direction perpendicular to the main board of the electronic whiteboard (obviously, you cannot push the ball hinge in a direction perpendicular to the main board of the electronic whiteboard to hit the main board of the electronic whiteboard ), the triangular plate of the small square plate is lifted, and the other triangular plate is lifted slightly through the hinge. At this time, the holding ball hinge is pulled to the right along a horizontal line, and the triangular plate can rotate around the limit ball hinge. The rotation will not Obstructed by other triangular plates, pull the ball hinge to the right along a horizontal line until the small square plate group on the right is completely unfolded, forming an extended rectangular plate surface, and the ball hinge is absorbed and fixed by the magnet of the extension rod. The technical solution of the present application cleverly utilizes the limit ball hinge and the hinge, and when the square plate rotates, it does not strictly rotate in the plane, but rotates three-dimensionally. The extension rod is hinged on the bracket. When the two sets of small square plates of the expansion board are unfolded in place, rotate the extension rod to the position of the ball hinge at the apex of the triangular plate, and the ball hinge is attracted by the magnet, thereby fixing the expansion board to form a width Double the electronic whiteboard.

Description of drawings:

Accompanying drawing 1 is the structural representation of the utility model.

Accompanying drawing 2 is the back view of the utility model.

Accompanying drawing 3 is the structure schematic diagram when the main board of the electronic whiteboard of the present invention is not unfolded.

detailed description:

Example 1:

An expandable multimedia electronic whiteboard used in teaching, which consists of: a square electronic whiteboard main board 1, the electronic whiteboard main board is installed on a bracket 2, and a multimedia projector 3 is installed on the bracket. The surface of the main board of the electronic whiteboard is covered with an expansion board that is also a square, and the expansion board includes four small square boards 4, and two small square boards form a group;

The square small plate includes two triangular plates 5, and the two triangular plates are connected together by hinges at right angles, and the apex of one of the triangular plates is connected with the apex of the main board of the electronic whiteboard through a limit ball hinge connection, the apex of another triangular plate is connected with the ball hinge at the vertices of the triangular plate of the same group of square small plates; The angle of inclination formed does not exceed 10 degrees;

The bracket has two extension struts 6, and the end points of the extension struts have magnets 7. After the expansion board is unfolded, the magnets of the extension struts are adsorbed and fixedly connected with the hinge points of the triangular plate.

Example 2:

According to the board surface expandable multimedia electronic whiteboard used in the teaching described in Embodiment 1, universal wheels are installed at the lower end of the support.

Claims (2)

1. A board surface expandable multimedia electronic whiteboard used in teaching, which consists of: a square electronic whiteboard main board, characterized in that: the electronic whiteboard main board is installed on a support, and a multimedia projection is installed on the support instrument, the surface of the main board of the electronic whiteboard is covered with an expansion board that is also a square, and the expansion board includes four small square boards, and two small square boards form a group; The square small board includes two triangular boards, and the two triangular boards are connected together by hinges at right-angled sides, and the apex of one of the triangular boards is connected with the apex of the main board of the electronic whiteboard by a limit ball hinge , the apex of the other triangular plate is connected with the triangular plate apex ball hinge of the same group of small square plates; the limit ball hinge limits the rotation of the triangular plate around the axis perpendicular to the main board of the electronic whiteboard, and at the same time restricts the plane where the triangular plate and the main board of the electronic whiteboard are located to form a the angle of inclination does not exceed 10 degrees; The bracket has two extension struts, and the end points of the extension struts have magnets. After the expansion plate is unfolded, the magnets of the extension struts are adsorbed and fixedly connected to the hinge points of the triangular plate. 2. The multimedia electronic whiteboard with expandable board surface used in teaching according to claim 1, characterized in that: universal wheels are installed at the lower end of the support.