CN108454282A - It is a kind of to draw round mathematics set square - Google Patents

Abstract

Round set square can be drawn the invention discloses a kind of,Including set square ontology,The long side center of set square ontology is equipped with empty slot,Clockwork spring is provided in empty slot,Clockwork spring one end is connect by fixing bolt with set square,The clockwork spring other end connects draught line,Empty slot top is equipped with capping,Capping central part is equipped with towing pad,Draught line is drawn from towing pad,Chalk device is put in the connection of the draught line other end,The long side both sides of set square ontology are equipped with half round bar,The central point of half round bar is overlapped with towing pad,Half round bar bottom edge is connect with the long side steel disc of set square ontology,The upper end of the half round bar of both sides is connected by coupling bar,The present invention solves the problems, such as that traditional compasses are difficult to circle of painting on three-dimensional surface,Movable draught line can draw the circle for locating various diameters,Solve the problems, such as that half slot can only draw fixed circle in traditional triangle ruler,Compared to traditional triangle ruler,The present invention is more practical,It is convenient.

Description

It is a kind of to draw round mathematics set square

Technical field

The present invention relates to math teaching aid fields, and in particular to a kind of to draw round mathematics set square.

Background technology

It needs to use many classroom instruction tools in teaching, the most common mathematical tool of set square is mainly used for making Geometrical pattern measures length and angle, during carrying out several teaching, it is often necessary to draw circle, and make on stereo black board Draw circle with a compass it is very inconvenient, and due to blackboard be hard, compasses supporting leg be easy slip so that the circle of picture is lack of standardization.It is existing Set square in set and be used for picture there are one half slot and justify, but fix when due to half slot so that used when imparting knowledge to students it is seldom, So many teachers are arbitrarily to draw circle using hand in field research, certain influence is brought to teaching.

Invention content

Round set square, including set square ontology, set square sheet can be drawn the main purpose of the present invention is to provide a kind of The centrally disposed empty slot of internal long side controls the flexible of draught line by the clockwork spring in empty slot, and draught line is another The chalk device at end, which can be used for realizing on blackboard, to be write, and is controlled in the scale that the central point both sides of set square long side are equipped with After determining radius, round radius is controlled using slide plate fixed traction line for round radius, to draw required circle, is had Effect solves the problems in background technology

To achieve the above object, the technical solution that the present invention takes is：

A kind of to draw round set square, including set square ontology, the long side center of the set square ontology is equipped with empty slot, Clockwork spring is provided in empty slot, clockwork spring one end is connect by fixing bolt with set square, and the connection of the clockwork spring other end is led Lead, empty slot top are equipped with capping, and capping central part is equipped with towing pad, and draught line is drawn from towing pad, and the draught line other end connects It connects and puts chalk device, the long side both sides of set square ontology are equipped with half round bar, and the central point of half round bar is overlapped with towing pad, half round bar Bottom edge is connect with the long side steel disc of set square ontology, and steel disc is connect with half round bar and set square ontology steel nail, the half round bar of both sides Upper end connected by coupling bar, be hollow between two half round bars.

Preferably, putting chalk device includes：Ledge for chalk on blackboard, chalk fixing bolt and supporting rod, ledge for chalk on blackboard are cylindrical groove, chalk The top of slot is equipped with bolt hole, and chalk fixing bolt and bolt hole are corresponding.

Preferably, supporting rod is fixed on ledge for chalk on blackboard bottom end, and supporting rod connects draught line, when clockwork spring is shunk, support Bar blocks two semi-circular plates so that ledge for chalk on blackboard is not fallen into inside semicircle device.

Preferably, it is equipped with scale on the inside of the long side of set square ontology, scale is stamped successively from half round bar central point to both sides.

Preferably, snap-gauge is equipped at towing pad, the snap-gauge is connect with capping by sliding slot, and snap-gauge is used for fixed traction Line so that when draught line moves required length to, do not extending, the inside of capping is equipped with the sliding slot of indent in the both sides of snap-gauge, The vertical bar that snap-gauge both sides are equipped with evagination is corresponding with sliding slot.

Preferably, two semicircle rooved faces are carved with angle line, angle number are carved on each angle line side, in order to use Convenient to carve two angle numbers, two angle numbers gradually increase in a reverse direction.

Preferably, set square body surface is equipped with anti-slip sucking disc, is preventing set square from sliding using process.

The operation principle of the present invention：It is a kind of to draw round set square, including set square ontology, the surface of triangular body The anti-slip sucking disc of setting can when using set square, to be fixed on blackboard and do not occur sliding, long in set square ontology The centrally disposed empty slot in side controls the flexible of draught line, the powder of the draught line other end by the clockwork spring in empty slot Pen device, which can be used for realizing on blackboard, to be write, and two half round bars are fixed by steel disc and set square long side, steel disc and semicircle Item and set square long side are fixed by steel nail so that half round bar is stablized, and the central point and towing pad of half round bar overlap so that The center of circle is fixed, and is measured round radius in the scale that the central point both sides of set square long side are equipped with, after determining radius, is used slide plate Fixed traction line is to control round radius, to draw required circle.

The beneficial effect comprise that：

1, solve the problems, such as that traditional compasses are difficult to circle of painting on three-dimensional surface.

2, movable draught line can draw the circle for locating various diameters, and fixation can only be drawn by solving half slot in traditional triangle ruler Round problem, compares traditional triangle ruler, and the present invention is more practical.

Description of the drawings

Fig. 1 is the overall structure diagram of the present invention.

Fig. 2 is the chalk device sectional view of the present invention.

Fig. 3 is the empty slot plan view of the present invention.

Fig. 4 is the empty slot sectional view of the present invention.

Fig. 5 is the connection diagram of the capping and snap-gauge of the present invention.

In figure：1, set square ontology；2, steel disc；3, steel nail；4, half round bar；5, clockwork spring；6, fixing bolt；7, anti-skidding suction Disk；8, chalk device；81, ledge for chalk on blackboard；82, chalk fixing bolt；83, supporting rod；84, chalk；9, draught line；10, coupling bar； 11, capping；12, snap-gauge；13, empty slot；14, towing pad.

Specific implementation mode

To make the technical means, the creative features, the aims and the efficiencies achieved by the present invention be easy to understand, with reference to Specific implementation mode, the present invention is further explained.

As shown in Figs. 1-5, a kind of to draw round set square, including set square ontology 1, the long side of the set square ontology Center is equipped with empty slot 13, is provided with clockwork spring 5 in empty slot, clockwork spring one end is connect by fixing bolt 6 with set square, clockwork spring The spring other end connects draught line 9, and empty slot top is equipped with capping 11, capping and empty slot hinge connection, and capping central part is equipped with and leads Pilot hole 14, draught line are drawn from towing pad, and the draught line other end connects chalk device 8, and the long side both sides of set square ontology are equipped with The central point of half round bar 4, half round bar is overlapped with towing pad, and half round bar bottom edge is connect with the long side of set square ontology by steel disc 2, Steel disc is connect with half round bar and set square ontology steel nail 3, and the upper end of the half round bar of both sides is connected by coupling bar 10, two semicircles It is hollow between item.

In the present embodiment, putting chalk device includes：Ledge for chalk on blackboard 81, chalk fixing bolt 82 and supporting rod 83, ledge for chalk on blackboard are circle Cylindrical groove, the top of ledge for chalk on blackboard are equipped with bolt hole, and chalk fixing bolt and bolt hole are corresponding, by rotate chalk fixing bolt come, Chalk 84 is squeezed by fixing bolt, to achieve the purpose that fixed chalk.

In the present embodiment, supporting rod is fixed on ledge for chalk on blackboard bottom end, and supporting rod connects draught line, when clockwork spring is shunk, Supporting rod blocks two half round bars so that ledge for chalk on blackboard is not fallen into inside semicircle device, and two half round bars are fixed by coupling bar, made It is formed between two half round bars hollow.

In the present embodiment, be equipped with scale on the inside of the long side of set square ontology, scale from half round bar central point to both sides successively Stamp is carved from central point to both sides, is drawing bowlder, and the radius of circle is determined by the number on scale.

In the present embodiment, snap-gauge 12 is equipped at towing pad, the snap-gauge is connect with capping by sliding slot, and snap-gauge is used for fixing Draught line so that when draught line moves required length to, do not extending, the inside of capping is equipped with the cunning of indent in the both sides of snap-gauge Slot, the vertical bar that snap-gauge both sides are equipped with evagination are corresponding with sliding slot.

In the present embodiment, two semicircle rooved faces are carved with angle line, and angle number is carved on each angle line side, in order to Easy to use to carve two angle numbers, two angle numbers gradually increase in a reverse direction, are drawing bowlder, are passing through angle line and angle The number of degrees determine round angle.

In the present embodiment, set square body surface is equipped with anti-slip sucking disc 7, is preventing set square from sliding using process.

When it is implemented, a kind of can draw round set square, including set square ontology, the surface setting of triangular body Anti-slip sucking disc can when using set square, to be fixed on blackboard and do not occur sliding, long side center in set square ontology Empty slot is set, the flexible of draught line, the chalk device of the draught line other end are controlled by the clockwork spring in empty slot It can be used for realizing on blackboard and write, two half round bars are fixed by steel disc and set square long side, steel disc and half round bar and three Angle square long side is fixed by steel nail so that half round bar is stablized, and the central point and towing pad of half round bar overlap so that the center of circle is solid It is fixed, round radius is measured in the scale that the central point both sides of set square long side are equipped with, after determining radius, is led using slide plate fixation Lead is to control round radius, to draw required circle.

Above certain exemplary embodiments that the present invention is only described by way of explanation, undoubtedly, for ability The those of ordinary skill in domain without departing from the spirit and scope of the present invention can be with a variety of different modes to institute The embodiment of description is modified.Therefore, above-mentioned attached drawing and description are regarded as illustrative in nature, and should not be construed as to the present invention The limitation of claims.

Claims (7)

1. a kind of can draw round set square, including set square ontology, the long side center of the set square ontology is equipped with empty slot, institute It states and is provided with clockwork spring in empty slot, described clockwork spring one end is connect by fixing bolt with set square, and the clockwork spring is another One end connects draught line, and the empty slot top is equipped with capping, and the capping central part is equipped with towing pad, and the draught line is from described Towing pad is drawn, and chalk device is put in the draught line other end connection, and the long side both sides of the set square ontology are equipped with half round bar, The central point of the half round bar is overlapped with towing pad, and the half round bar bottom edge is connect with the long side steel disc of set square ontology, described Steel disc is connect with half round bar and set square ontology steel nail, and the upper end of the half round bar of both sides is connected by coupling bar, two described half It is hollow between round bar.

2. a kind of round set square can be drawn according to claim 1, it is characterised in that：The chalk device of putting includes： Ledge for chalk on blackboard, chalk fixing bolt and supporting rod, the ledge for chalk on blackboard are cylindrical groove, and the top of the ledge for chalk on blackboard is equipped with bolt hole, institute It states chalk fixing bolt and bolt hole is corresponding.

3. a kind of round set square can be drawn according to claim 2, it is characterised in that：The supporting rod upper surface connection In ledge for chalk on blackboard bottom end, the supporting rod lower surface connects draught line.

4. a kind of round set square can be drawn according to claim 1, it is characterised in that：The long side of the set square ontology Inside is equipped with scale, and scale is stamped successively from half round bar central point to both sides.

5. a kind of round set square can be drawn according to claim 1, it is characterised in that：Card is equipped at the towing pad Plate, the snap-gauge are connect with capping by sliding slot.

6. a kind of round set square can be drawn according to claim 1, it is characterised in that：Two semicircle rooved faces are carved Angled line.

7. a kind of round set square can be drawn according to claim 1, it is characterised in that：The set square body surface Equipped with anti-slip sucking disc.