CN204845253U - Blank that width can roll and prolong - Google Patents

Abstract

The utility model provides a blank that width can roll and prolong, includes support, roller bearing, bottom plate and sheet metal. The bottom plate, fixed mounting is on the support, the roller bearing, be equipped with 2, install respectively on support both sides about, the sheet metal, supply to write the use, install on the roller bearing on support both sides at its both ends, and there is the part on the both sides of sheet metal around on the roller bearing. The utility model discloses under the same circumstances of whole occupation space, increased and to have write the area.

Description

A kind of width can roll extend blank

Technical field

The utility model belongs to teaching aid, particularly a kind of blank.

Background technology

Blank is normally movable, and namely blank is rack-mount, and support is movable, very easy to use.But traditional blank rectangular flat plate that to be employing one piece fixing, area is also large not, can not write too many word thereon, so after writing full blank, have to, first wiping of having finished writing, again write new content above.But the content write many times, can not be wiped, because content write above also needs to use.The method of head it off be the area expanding blank, but blank is too large, just seems very heavy, uses just inconvenient.

Summary of the invention

In order to solve the problem existing for above-mentioned conventional white board, the utility model provide a kind of width can roll extend blank, when entirety takes up room identical, expand blank width, adding can write area.

The utility model solves the technical scheme that its technical problem adopts:

Width can roll extend a blank, comprise support, roller bearing, base plate and thin plate.Described base plate, is fixedly mounted on support; Described roller bearing, is provided with 2, is arranged on the right and left of support respectively, described thin plate, and be for writing, its two ends are arranged on the roller bearing on support both sides, and there is part on the both sides of thin plate around on roller bearing.

For the ease of writing, described base plate has magnetic, described thin plate, and main employing metal iron plate, makes thin plate can be close on base plate.

Further, described roller bearing, its upper and lower two ends are all provided with baffle plate.

Further, conveniently left and right promotes thin plate, thin plate be provided with row's square hole below, and be provided with 1 push pedal, push pedal is provided with 2 projections corresponding with square hole.The projection of push pedal is stuck in the square hole of thin plate, promotes push pedal and thin plate can be made to move left and right.

The beneficial effects of the utility model are mainly manifested in: when entirety takes up room identical, and adding can write area.

Accompanying drawing explanation

Fig. 1 is the surface structure schematic diagram of a kind of embodiment of the present utility model.

Fig. 2 is the structural representation seen after Fig. 1 opens thin plate.

Fig. 3 is the section structure schematic diagram that Fig. 1 laterally cuts open along dotted line A.

Fig. 4 is the structural representation of the push pedal (after amplifying) in Fig. 1.

Detailed description of the invention

Below in conjunction with accompanying drawing, embodiment of the present utility model is further described.

A kind of embodiment of the present utility model, is shown in shown in Fig. 1 ~ 4.

Width can roll extend a blank, comprise support 1, roller bearing 2, base plate 3 and thin plate 4.Described base plate 3, has certain magnetic.On support 1, be provided with 2 endways mounting rods 5, by mounted thereto for base plate 3.Described roller bearing 2, is provided with 2, is arranged on the right and left of support 1 respectively, and the two ends up and down of roller bearing 2 are all provided with baffle plate 6.Described thin plate 4, adopt metal iron plate, one side toward the outer side scribbles white paint, as writing surface; The two ends, left and right of thin plate 4 are arranged on the roller bearing 2 of support 1 the right and left respectively, and there is part on the both sides of thin plate 4 around on roller bearing 2.

Further, thin plate be provided with row's square hole 7 below, and be provided with a push pedal 8, push pedal 8 is provided with 2 projections 9 corresponding with square hole 7.The projection 9 of push pedal is stuck in the square hole 7 of thin plate, promotes push pedal 8 and thin plate 4 can be made to move left and right.

The utility model is not limited to embodiment above, and to one skilled in the art, under the prerequisite not departing from the utility model general principle, some changes made, all should be considered as belonging to protection domain of the present utility model.

Claims (2)

1. width can roll extend a blank, comprise support, roller bearing, base plate and thin plate; It is characterized in that: described base plate, be fixedly mounted on support; Described roller bearing, is provided with 2, is arranged on the right and left of support respectively; Described thin plate, be for writing, its two ends are arranged on the roller bearing on support both sides, and there is part on the both sides of thin plate around on roller bearing;

Described base plate has magnetic, described thin plate, main employing metal iron plate;

Described thin plate, it is provided with row's square hole below, and is provided with 1 push pedal, and push pedal is provided with 2 projections corresponding with square hole.

2. a kind of width according to claim 1 can roll extend blank, it is characterized in that: described roller bearing, its upper and lower two ends are all provided with baffle plate.