CN2034129U

CN2034129U - Multifunction blackboard plotting device

Info

Publication number: CN2034129U
Application number: CN 88213543
Authority: CN
Inventors: 富英显
Original assignee: Individual
Current assignee: Individual
Priority date: 1988-08-22
Filing date: 1988-08-22
Publication date: 1989-03-15

Abstract

The utility model discloses a blackboard line tool. The blackboard line tool can simultaneously draw out five lines of staffs, four lines lattices of the handwriting of foreign languages and 'tian' word squares. The utility model is characterized in comprising chalk jacket tubes, springs, a short arm lever, a long arm lever and a rotating shaft. Five chalk jacket tubes are arranged in a casing. The springs are arranged in the chalk jacket tubes. The blackboard line tool can clamp the chalk by a generic key pressing plate and a separate key button outside of the casing driving the lever long arm and the lever short arm, can automatically replenish the chalk when the chalk breaks for completing line drawing with time-saving, and enhances the accuracy of the line drawing.

Description

Multifunction blackboard plotting device

The utility model is a teaching blackboard line tool.

Traditional blackboard setting-out all is with ruler and chalk, the distance between centers of tracks inequality of drawing, and the time is long.

The purpose of this utility model provides a kind of, the four line lattice and the field word grid of five lines of the staff that can draw simultaneously on blackboard, four line lattice of Chinese phonetic alphabet handwritten form, foreign language handwritten form.

The utility model mainly is made up of housing (1), generic key pressing board (2), clamping chalk elasticity steel wire (3), chalk sleeve pipe (4), branch key knob steel wire (5), branch key knob (6).

Its special character is: there are five chalk sleeve pipes (4) housing (1) lining, chalk sleeve pipe (4) is fixed on the base (11), generic key pressing board (2) is arranged above the housing (1), there are five branch key knobs (6) at the back side of housing (1), and lever long-armed (9) and lever short arm (14) and lever shaft (8) are welded into one.

Most preferred embodiment is as depicted in figs. 1 and 2: shell (1) is to make flat cuboid with metal sheet, the hole, garden of five same specifications is arranged at the top, have a square opening in the middle of positive, generic key pressing board (2) is installed, upper rear portion has five slots that same specification is less, and five branch key knobs (6) are installed.

Chalk sleeve pipe (4) is to make with metal sheet, and the Lower Half of the inside is equipped with spring (10), is welded on the base (11) together with chalk sleeve pipe (4); Chalk sleeve pipe (4) has five, equidistantly is welded on the base (11), is contained in the inside of housing (1), and fixing, but sub-fraction is arranged at the top of chalk sleeve pipe (4), stretches out outside the housing from the hole, five gardens of housing (1).Ten lever short arms (14) are to make circle with the steel material with lever long-armed (9), are welded in respectively on the lever shaft (8) to make it to become one.Totally three of rotating shaft fixed covers (7) are enclosed within the outside of lever shaft (8), then rotating shaft fixed cover (7) is welded in respectively chalk sleeve pipe (4) above.

Elasticity steel wire upper support bar (13) is welded in the back side first half of chalk sleeve pipe (14), and elasticity steel wire lower support bar (12) is welded in the Lower Half at chalk sleeve pipe (4) back side.

A flat groove of rectangle is respectively arranged at the positive top of five chalk sleeve pipes (4), and clamping chalk elasticity steel wire (3) is pressed in the flat groove of chalk pipe box (4), and the outer two ends of flat groove steel wire is fixed on the steel wire lower support bar (12) by steel wire upper support bar (13).

Five branch key knob steel wires (5) are made U-shaped, are enclosed within the back side of five chalk sleeve pipes (4) respectively; The two ends of steel wire are enclosed within on the clamping chalk elasticity steel wire (3).

Above-mentioned each part all is contained in the inside of housing (1), then following three side sealing about housing (1) is closed.

Dress is during chalk, respectively by each minute key knob (6), by chalk is put into chalk sleeve pipe (4) the inside, the back steel wire of loosing one's grip is clamped chalk automatically, or presses generic key pressing board (2) chalk of packing into simultaneously, or together takes out chalk.

During use hand press scriber generic key pressing board (2) can setting-out on blackboard, a chalk break during as setting-out, the chalk of chalk sleeve pipe (4) lining can eject additional automatically, makes lines uninterrupted, assurance setting-out quality.

Multi-functional setting-out device can draw simultaneously as required five lines, four lines, three lines and field word grid are saved the setting-out time, improve the quality of teaching, and be the best setting-out teaching aid of each school.

Description of drawings

Fig. 1

1, housing; 2, generic key knob; 3, clamping chalk elasticity steel wire; 4, chalk sleeve pipe; 5, divide key knob wire; 6, divide the key knob.

Fig. 2

7, rotating shaft fixed cover; 8, lever shaft; 9, lever is long-armed; 10, spring; 11, base; 12, steel wire lower support bar; 13, steel wire upper support bar; 14, lever short arm.

Claims

1, a kind of multi-functional blackboard scriber mainly is made up of housing (1), generic key pressing board (2), clamping chalk elasticity steel wire (3), chalk sleeve pipe (4), branch key knob steel wire (5), branch key knob (6).It is characterized in that there are five chalk sleeve pipes (4) housing (1) lining, chalk sleeve pipe (4) is fixed on the base (11), there is generic key pressing board (2) at the back side of housing (1), there are five branch key knobs (6) at the back side of housing (1), and lever long-armed (9) and lever short arm (14) and lever shaft (8) are welded into one.

2, according to claim 1, the multi-functional blackboard scriber is characterized in that housing (1) is the flat cuboid of being made by metal sheet, and the hole, garden of five same specifications is arranged at the top.

3, according to claim 1, the multi-functional blackboard scriber is characterized in that the inside Lower Half of chalk sleeve pipe (4) is equipped with spring (10), and is welded on the base (11) together with chalk sleeve pipe (4).

4, according to claim 1, the multi-functional blackboard scriber is characterized in that lever long-armed (9) lever short arms (14) and lever shaft are to make circular shaft shape with the steel material.