CN2744528Y - Magnetic blackboard - Google Patents

Abstract

The utility model belongs to the teaching tools, mainly relating to a magnetic blackboard. The magnetic blackboard is characterized in that an electromagnetic coil and a reverse T-shaped support are arranged on the back of a writing board. A strip-shaped permanent magnet is arranged on the vertical beam of the support. The upper end of the vertical beam is provided with a guide positioning wheel which is arranged in a guiding slot on the upper frame of the side frame, and both ends of a horizontal beam are provided with a supporting roller which is arranged at the bottom of a guiding slot on the lower frame of the side frame. A handle is arranged at the lower side of the reverse T-shaped support, and a groove is arranged on the side frame corresponding to the position of the handle. The magnetic blackboard has the advantages of simple structure, good using effect and convenient handwriting mark elimination.

Description

Magnet board

Technical field: the utility model belongs to educational aid, is specifically related to a kind of magnet board.

Background technology: existing blackboard is to write on plate body with chalk, its shortcoming is that Faculty and Students easily suck a large amount of chalk dusts when wiping writing, unhygienic, influence healthy, and the magnet board that occurs on the market, because of there not being special equipment for erasing hand-writings, mostly its writing is to lean on the magnet on special-purpose magnetic pen one end to remove, it is time-consuming to exist writing to remove, inefficient shortcoming.

Summary of the invention: goal of the invention of the present utility model provides a kind of simple in structure, and result of use is good, eliminates writing magnet board easily.

The technical solution of the utility model is: a kind of magnet board, be placed with the spherical magnetic-particle of black and white in the cellular aperture that gathers in transparent wordpad, establish frame on around the clipboard, it is characterized in that: be provided with solenoid and inverse-T-shaped support at the back side of clipboard; Establish the strip-shaped permanent-magnet body on the support vertical beam, the vertical beam upper end is established guide-localization and is taken turns the gathering sill that is positioned on the frame upper ledge, establish on the crossbeam two ends on the bottom land that support roller is positioned at the gathering sill on the frame lower frame, establish handle, establish groove on the frame corresponding with handle position at inverse-T-shaped support downside.

Owing to adopt technique scheme, the back side of clipboard is provided with solenoid, when connecting power supply, solenoid produces magnetic field, because like pole repels each other, opposite pole is inhaled mutually, solenoid is eliminated the writing on the clipboard under magneticaction, thereby having simple in structurely, result of use is good, eliminates writing advantage easily.

Description of drawings: come the technical solution of the utility model is described further below in conjunction with the drawings and specific embodiments.Fig. 1 is a structural representation of the present utility model, and Fig. 2 is the A-A cutaway view of Fig. 1, and Fig. 3 is the rearview of Fig. 1.

The specific embodiment: with reference to figure 1--Fig. 3.A kind of magnet board is placed with the spherical magnetic-particle of black and white in the cellular aperture that gathers in transparent wordpad 5, clipboard 5 is established frame 2 all around, is provided with solenoid 7 and inverse-T-shaped support 6 at the back side of clipboard 5; Establish strip-shaped permanent-magnet body 4 on support 6 vertical beams, guide-localization wheel 3 gathering sills 1 that are positioned on frame 2 upper ledges are established in the vertical beam upper end, establish on the crossbeam two ends on the bottom land that support roller 8 is positioned at the gathering sill 9 on frame 2 lower frames, establish handle 10 at inverse-T-shaped support 6 downsides, establish groove on the frame 2 corresponding with handle 10 positions.During use, directly on clipboard, write with supporting with it magnetic pen; When eliminating writing, can connect the power switch solenoid and produce magnetic field with the writing full scale clearance, the strip-shaped permanent-magnet body on the also removable handle drive support moves at the clipboard back side to be removed.

Claims (1)

1, a kind of magnet board, be placed with the spherical magnetic-particle of black and white in the cellular aperture that gathers in transparent wordpad (5), clipboard (5) is established frame (2) all around, it is characterized in that: be provided with solenoid (7) and inverse-T-shaped support (6) at the back side of clipboard (5); Establish strip-shaped permanent-magnet body (4) on support (6) vertical beam, vertical beam upper end is established guide-localization wheel (3) and is positioned at gathering sill (1) on frame (2) upper ledge, establish on the crossbeam two ends on the bottom land that support roller (8) is positioned at the gathering sill (9) on frame (2) lower frame, establish handle (10) at inverse-T-shaped support (6) downside, establish groove on the frame (2) corresponding with handle (10) position.

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