CN209580949U

CN209580949U - A kind of multifunctional drawing ruler

Info

Publication number: CN209580949U
Application number: CN201920194738.4U
Authority: CN
Inventors: 孟垂昊
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-02-14
Filing date: 2019-02-14
Publication date: 2019-11-05
Anticipated expiration: 2029-02-14

Abstract

The utility model relates to teaching aid technical fields, especially a kind of multifunctional drawing ruler, including ruler, U-shaped block, connecting rope and chalk barrel, the ruler left and right ends are plugged with sliding ruler, it slides and is equipped with through slot on the outside of ruler, inside is connected with extension rod, the nearly gear side of extension rod is connected with the rack gear being meshed with gear, the U-shaped block lower inside surface, which is connected with, mutually fits matched fixed teeth with the gear, inserted block is plugged in the through slot, the connecting rope is fixed between two inserted blocks, the chalk barrel lower part is connected with fixed spacing collar, top is equipped with screw thread and external screw-thread is socketed with fastening nut, the ruler lower end surface is connected with angle square.The structure design of the utility model is reasonable, can meet the measurement and drafting of Common graphical in mathematical education, vdiverse in function, and it is convenient to operate, and can rely on U-shaped block locking device, while sliding ruler and can pack up inwardly, to reduce space hold.

Description

A kind of multifunctional drawing ruler

Technical field

The utility model relates to teaching aid technical field, especially a kind of multifunctional drawing ruler.

Background technique

At present in the teaching process of mathematics geometry, teacher needs to use a variety of drawing tools, such as ruler, compasses, triangle Ruler, bevel protractor and oval scale etc., especially current senior middle school's teaching analytical geometry are frequently necessary to use round and ellipse, but two in the process Person purely relies on Freehandhand-drawing very difficult, and the two method for drafting is not also identical.

To save instructional blocks of time, drawing efficiency and drawing accuracy of the teacher during senior middle school's geometry teaching, In are improved Notification number is to disclose a kind of mathematic(al) construction tool in the Chinese utility model patent of CN207942849U, achievable circular arc and Circle, two intersecting straight lines with special angle and elliptical drafting, it is vdiverse in function.But not only volume is larger for the device, no Convenient for storage, and in the utility model, the distance to determine transverse is slided along the chute by sliding block, since sliding block lacks Weary fixed device, and whole need to keep tensing connecting rope when drawing oval, thus be easy so that sliding block sliding, makes drawing result It is not accurate enough.

Summary of the invention

The purpose of this utility model is to overcome above-mentioned technical disadvantages to provide a kind of multifunctional drawing ruler, can meet mathematics The measurement and drafting of Common graphical, vdiverse in function in teaching, and it is convenient to operate, and can rely on U-shaped block locking device, while sliding ruler It can pack up inwardly, to reduce space hold.

The utility model solves the technical solution that technical problem uses are as follows: a kind of multifunctional drawing ruler, including ruler, U-shaped Block, connecting rope and chalk barrel, the ruler inner hollow, left and right ends are plugged with sliding ruler, wherein left slide ruler left part And right side sliding ruler right part is equipped with through slot, left slide ruler upper right side and right side sliding ruler left upper end are connected with extension rod, left Slideslip ruler bottom righthand side and right side sliding ruler lower-left end are equipped with to be adapted to and the extension rod slot of grafting with extension rod, in the ruler Bottom surface center is connected with connecting shaft, is socketed with gear in connecting shaft, and the nearly gear side of the extension rod is connected with to be meshed with gear Rack gear, since two extension rod upper racks are engaged with gear, thus two sliding rulers can be synchronized and outwardly or inwardly be moved, described straight Ruler top is set at left and right sides of the gear there are two jack, and centre is equipped with slot, the U-shaped block lower inside surface be connected with it is described Gear mutually fits matched fixed teeth, and U-shaped block lower part is inserted into along two jacks, makes the fixed teeth of U-shaped block lower inside surface It is engaged with gear, then lockable gear no longer rotates it, and then can fix the position of two sliding rulers, grafting in the through slot There is inserted block, the connecting rope is fixed between two inserted blocks, and the chalk barrel lower part is connected with fixed spacing collar, and top is equipped with spiral shell Line and external screw-thread are socketed with fastening nut, and for inserting chalk in chalk barrel, connecting rope is connected in fixed spacing collar and tight Gu between the annular groove that nut is formed, connecting rope is tensed in side and connecting rope is maintained to tense on blackboard with chalk, Ji Kehui Produce half of elliptical orbit, in kind draw other half of elliptical orbit, elliptical drafting can be completed, by two inserted blocks from It extracts, one of inserted block is inserted into slot, while screwing fastening nut in through slot, utilize fastening nut and fixed limit Circle clamps connecting rope and chalk barrel is fixed with connecting rope position, can carry out drawing for circular arc and circle by the center of circle of slot at this time System, the ruler lower end surface is connected with angle square, and with the measurement and drafting for angle, the center of circle is equipped in the middle part of angle square and ruler junction Hole, with for determining the vertex at angle, angle square is equipped with fan-shaped peep hole, in order to observe, the ruler upper end is equipped with first Graduation mark, and using intermediate middle as zero point, the sliding ruler is equipped with the second graduation mark, and to be corresponding to the through slot center of circle Zero point extends to ruler, and the first graduation mark adds the value that the second graduation mark is shown, the value of a, the angle square as in ellipse formula It is equipped with angle line, for determining angle.

Further, it is connected with sucker on the ruler bottom face, in order to which device to be adsorbed on blackboard, so that drawing It is more convenient.

Further, it is connected with lanyard on the U-shaped block, the lanyard other end is fixed on ruler, to prevent U-shaped block from being pulled out Lose after out.

Further, one layer of rubber layer is connected with outside the inserted block, so that inserted block insertion through slot or slot Nei Shimo It is bigger to wipe power, so that inserted block will not fall off.

Further, the inserted block top is connected with handle, in order to extract inserted block out of through slot or slot.

Beneficial effect possessed by the utility model is: the structure design of the utility model is reasonable, can be used for straight line, line segment, Round and elliptical drafting, also can be used for the measurement and drafting at angle, and can rely on U-shaped block locking device, when preventing ellipse drawing because It pulls connecting rope and two sliding rulers is caused to slide；Sliding ruler can be packed up inwardly, to reduce space hold.

Detailed description of the invention

Attached drawing 1 is the schematic view of the front view of the utility model.

Attached drawing 2 is the structural schematic diagram of gear described in the utility model and U-shaped block.

Attached drawing 3 is the structural schematic diagram of through slot described in the utility model and inserted block.

Attached drawing 4 is the structural schematic diagram of chalk barrel described in the utility model.

Attached drawing 5 is the structural schematic diagram of U-shaped block described in the utility model.

Specific embodiment

1 ~ 5 pair of the utility model is described below with reference to the accompanying drawing.

As shown in Fig. 1 ~ 5, the utility model includes ruler 1, U-shaped block 8, connecting rope 10 and chalk barrel 11, in the ruler 1 Portion is hollow, and left and right ends are plugged with sliding ruler 2, and wherein 2 left part of left slide ruler and right side sliding 2 right part of ruler are equipped with through slot 3, 2 upper right side of left slide ruler and right side sliding 2 left upper end of ruler are connected with extension rod 4, and 2 bottom righthand side of left slide ruler and right side are sliding Dynamic 2 lower-left end of ruler is equipped with the extension rod slot 2-1 that simultaneously grafting is adapted to extension rod 4, and the 1 inner bottom surface center of ruler is connected with company Spindle 5 is socketed with gear 6 in connecting shaft 5, and nearly 6 side of gear of the extension rod 4 is connected with the rack gear 4-1 being meshed with gear 6, Since two extension rods, 4 upper rack 4-1 is engaged with gear 6, thus two sliding rulers 2 can be synchronized and outwardly or inwardly be moved, described straight 1 top of ruler is set at left and right sides of gear 6 there are two jack 1-1, and centre is equipped with slot 7, and 8 lower inside surface of U-shaped block is affixed Have and fit matched fixed teeth 8-1 with 6 phase of gear, 8 lower part of U-shaped block is inserted into along two jack 1-1, makes 8 lower part of U-shaped block The fixed teeth 8-1 of medial surface is engaged with gear 6, then lockable gear 6 no longer rotates it, and then can fix two sliding rulers 2 position is plugged with inserted block 9 in the through slot 3, and the connecting rope 10 is fixed between two inserted blocks 9, under the chalk barrel 11 Portion is connected with fixed spacing collar 11-1, and top is equipped with screw thread 11-2 and external screw-thread is socketed with fastening nut 12, in chalk barrel 11 Can be used for inserting chalk, 1 lower end surface of ruler is connected with angle square 13, with the measurement and drafting for angle, angle square 13 and ruler 1 Circle center hole 14 is equipped in the middle part of junction, with for determining the vertex at angle, angle square 13 is equipped with fan-shaped peep hole 13-1, in order to Observation, 1 upper end of ruler are equipped with the first graduation mark 15, and using intermediate middle as zero point, the sliding ruler 2 is equipped with second Graduation mark 16, and with corresponding to 3 center of circle of through slot be zero point to ruler 1 extend, the angle square 13 be equipped with angle line 17, with In determining angle.

In the present embodiment, it is connected with sucker 18 on 1 bottom face of ruler, in order to which device is adsorbed on blackboard, So that drawing more convenient.

In the present embodiment, lanyard 19 is connected on the U-shaped block 8,19 other end of lanyard is fixed on ruler 1, to prevent Only U-shaped block 8 is lost after being pulled out.

In the present embodiment, it is connected with one layer of rubber layer 20 outside the inserted block 9, so that inserted block 9 is inserted into through slot 3 or inserts Frictional force is bigger when in slot 7, so that inserted block 9 will not fall off.

In the present embodiment, 9 top of inserted block is connected with handle 21, in order to by inserted block 9 out of through slot 3 or slot 7 It extracts.

When using the utility model, the drafting of straight line can be carried out using ruler 1, it can by the first graduation mark 15 on ruler 1 Carry out the measurement and drafting of line segment；Two inserted blocks 9 are inserted into through slot 3, insert chalk in chalk barrel 11, connecting rope 10 is blocked It is connected between the annular groove that fixed spacing collar 11-1 and fastening nut 12 are formed, tenses connecting rope 10 and with chalk black in side It maintains connecting rope 10 to tense on plate, half of elliptical orbit can be drawn out, in kind draw other half of elliptical orbit, i.e., Achievable elliptical drafting, the first graduation mark 15 adds the value of the second graduation mark 16 display, a as in ellipse formula at this time Value adjusts two sliding rulers 2, can draw out different size of ellipse, 8 lower part of U-shaped block is inserted into along two jack 1-1, makes U-shaped The fixed teeth 8-1 of 8 lower inside surface of block is engaged with gear 6, then lockable gear 6 no longer rotates it, and then can be fixed The position of two sliding rulers 2 prevents from causing two sliding rulers 2 to slide because pullling connecting rope 10 when ellipse drawing；By two inserted blocks 9 from logical It extracts, one of inserted block 9 is inserted into slot 7, while screwing fastening nut 12 in slot 3, using fastening nut 12 and admittedly Fixing limit circle 11-1 clamps connecting rope 10 and chalk barrel 11 is fixed with 10 position of connecting rope, at this time with slot 7 for the center of circle Carry out the drafting of circular arc and circle；The vertex at angle is directed at circle center hole 14, can be used for measuring the angle at angle；One is drawn with ruler 1 Ray is directed at ray starting point with circle center hole 14, a bit of straight line where angular referenced line 17 determines the another a line at angle, then benefit Ray starting point and the point are connected with ruler 1, the drafting at the angle of special angle can be completed；The utility model is vdiverse in function, operation It is convenient, and sliding ruler 2 can be packed up inwardly, to reduce space hold.

Claims

1. a kind of multifunctional drawing ruler, including ruler, U-shaped block, connecting rope and chalk barrel, it is characterised in that: inside the ruler Hollow, left and right ends are plugged with sliding ruler, and wherein left slide ruler left part and right side sliding ruler right part are equipped with through slot, and left side is sliding Dynamic ruler upper right side and right side sliding ruler left upper end are connected with extension rod, and ruler lower-left end is slided on left slide ruler bottom righthand side and right side It is equipped with the extension rod slot that simultaneously grafting is adapted to extension rod, ruler inner bottom surface center is connected with connecting shaft, covers in connecting shaft It is connected to gear, the nearly gear side of the extension rod is connected with the rack gear being meshed with gear, and the ruler top is in gear or so two Side is set there are two jack, and centre is equipped with slot, and the U-shaped block lower inside surface, which is connected with, mutually fits matched fixation with the gear Teeth are plugged with inserted block in the through slot, and the connecting rope is fixed between two inserted blocks, and the chalk barrel lower part is connected with Fixing limit circle, top are equipped with screw thread and external screw-thread and are socketed with fastening nut, and the ruler lower end surface is connected with angle square, angle square and Circle center hole is equipped in the middle part of ruler junction, angle square is equipped with fan-shaped peep hole, and the ruler upper end is equipped with the first graduation mark, and Using intermediate middle as zero point, the sliding ruler is equipped with the second graduation mark, and to be zero point corresponding to the through slot center of circle to straight Ruler extends, and the angle square is equipped with angle line.

2. a kind of multifunctional drawing ruler according to claim 1, it is characterised in that: be connected with suction on the ruler bottom face Disk.

3. a kind of multifunctional drawing ruler according to claim 1, it is characterised in that: be connected with lanyard on the U-shaped block, hang The rope other end is fixed on ruler.

4. a kind of multifunctional drawing ruler according to claim 1, it is characterised in that: be connected with one layer of rubber outside the inserted block Glue-line.

5. a kind of multifunctional drawing ruler according to claim 1, it is characterised in that: the inserted block top is connected with handle.