CN107471867A - A kind of contraction type teaching drawing ruler - Google Patents
A kind of contraction type teaching drawing ruler Download PDFInfo
- Publication number
- CN107471867A CN107471867A CN201710762047.5A CN201710762047A CN107471867A CN 107471867 A CN107471867 A CN 107471867A CN 201710762047 A CN201710762047 A CN 201710762047A CN 107471867 A CN107471867 A CN 107471867A
- Authority
- CN
- China
- Prior art keywords
- arc
- ruler
- big
- rotating bar
- largest
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
- B43L—ARTICLES FOR WRITING OR DRAWING UPON; WRITING OR DRAWING AIDS; ACCESSORIES FOR WRITING OR DRAWING
- B43L9/00—Circular curve-drawing or like instruments
Landscapes
- Drawing Aids And Blackboards (AREA)
Abstract
The invention discloses a kind of contraction type teaching drawing ruler, including small arc, the first big arc and rotating bar, the top side of the rotating bar is provided with the first big arc, the side of the first big arc is provided with the neck for being snapped connection with second largest arc side, the bottom of the first big arc is provided with small arc in the rotating bar, the bottom of the rotating bar is rotatablely connected by rotary shaft and the first ruler.In the present invention, the back of first big arc is slidably connected by sliding block and the arc groove on second largest arc, and first the back of ruler be connected by sliding block with the slide on the second ruler, therefore when not in use, first big arc and the first ruler can be contracted to the top of second largest arc and the second ruler, so as to save the space-consuming of drawing ruler, offered convenience to teacher.
Description
Technical field
The present invention relates to teaching equipment technical field, more particularly to a kind of contraction type teaching drawing ruler.
Background technology
Ruler does not claim chi, is for setting-out section (especially straight), measures the instrument of length.Generally there is scale to measure on chi
Spend length.Some rulers, special shape such as letter or circular hole are left in centre, facilitates user to draw, " snake son chi " is special
For the chi of trace.Set square is the chi of right angled triangle or isosceles triangle, is conveniently drawn parallel lines or vertical line.Calculate
Chi：A kind of calculating instrument.Tape：It is commonly used to measure human body parts.Measuring tape：For measuring building, furniture etc..Slide measure：
For measuring more smart small thing.In construction with ruler and compasses, chi is considered as drawing the instrument of the straight line of infinite length.
But existing drawing ruler still has several drawbacks part, for example present Faculty and Students are on blackboard or textbook
Upper drawing circle or picture arc are still a big problem, and teacher draws good pleasing, while can attract the sight of student, improves classroom
Efficiency, student draw it is good, it is possible to increase the interest of the study of itself, the area occupied that also exactly existing drawing ruler has compared with
Greatly, it is placed on lectern and takes lectern too large space, causing the thing of teachers can nowhere puts.
The content of the invention
The invention aims to solve shortcoming present in prior art, and a kind of contraction type teaching picture proposed
Figure chi.
To achieve these goals, present invention employs following technical scheme：A kind of contraction type teaching drawing ruler, including
Small arc, the first big arc and rotating bar, the top side of the rotating bar is provided with the first big arc, and first is big
The back of arc is slidably connected by sliding block and the arc groove on second largest arc, the side of the first big arc
The neck for being snapped connection with second largest arc side is provided with, the bottom of the first big arc is located in the rotating bar
Small arc is provided with, the bottom of the rotating bar is rotatablely connected by rotary shaft and the first ruler, and the back of the first ruler
It is connected by sliding block with the slide on the second ruler, the back of the rotary shaft is provided with the extension for fixing drawing ruler
Detain, the circular hole for aiding in picture to justify is offered on the appearance wall of the rotating bar, and positioned at circular hole on the appearance wall of rotating bar
Both sides are provided with scale.
As further describing for above-mentioned technical proposal：
The circular hole is provided with multiple altogether, and spacing is equal between any two for multiple circular holes.
As further describing for above-mentioned technical proposal：
The angle of the first big arc is consistent with the angle of second largest arc.
As further describing for above-mentioned technical proposal：
The diameter of the small arc is smaller 10cm than the diameter of the first big arc.
As further describing for above-mentioned technical proposal：
The first big arc is consistent with the structure of second largest arc, and the first big arc and second largest arc
Vertical center line on rotary shaft is symmetrical.
As further describing for above-mentioned technical proposal：
Scale is provided with first ruler and the second ruler.
In the present invention, first, the back of the first big arc is slided by the arc groove on sliding block and second largest arc
Dynamic connection, and the back of the first ruler is connected by sliding block with the slide on the second ruler, therefore when not in use, can be with
First big arc and the first ruler are contracted to the top of second largest arc and the second ruler, so as to save accounting for for drawing ruler
With space, offered convenience to teacher, secondly, the bottom of rotating bar is rotatablely connected by rotary shaft and the first ruler, and rotating bar
On equidistantly offer multiple circular holes, and the side of circular hole is correspondingly arranged on scale, therefore pen is placed in circular hole by user, Ran Houxuan
Lever of walking around can draw a circle or circular arc, such mode cause the circle drawn faster, save the time in classroom, improve
Attend class efficiency.
Brief description of the drawings
Fig. 1 is a kind of structural representation of contraction type teaching drawing ruler proposed by the present invention；
Fig. 2 is structural representation when the first big arc of the present invention rotates；
Fig. 3 is internal structure schematic diagram when buckle of the present invention is connected with neck；
Fig. 4 is the structural representation of rotating bar of the present invention.
Marginal data：
The small arcs of 1-, the first big arcs of 2-, the second largest arcs of 21-, the rulers of 3- first, the rulers of 31- second, 4- are hung
Button, 5- rotating bars, 6- rotary shafts, 7- arc grooves, 8- buckles, 9- necks, 10- scales, 11- circular holes.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.
Reference picture 1-4, a kind of contraction type teaching drawing ruler, including small arc 1, the first big arc 2 and rotating bar
5, the top side of rotating bar 5 is provided with the first big arc 2, and the back of the first big arc 2 by sliding block with it is second largest
Arc groove 7 on arc 21 is slidably connected, and the side of the first big arc 2, which is provided with, to be used for and second largest arc 21 1
The neck 9 that side buckle 8 connects, the bottom in rotating bar 5 positioned at the first big arc 2 are provided with small arc 1, rotating bar 5
Bottom is rotatablely connected by rotary shaft 6 and the first ruler 3, and the back of the first ruler 3 passes through on sliding block and the second ruler 31
Slide connects, and the back of rotary shaft 6 is provided with buckles 4 for fix drawing ruler, is offered on the appearance wall of rotating bar 5
For the circular hole 11 for aiding in picture to justify, and the both sides on the appearance wall of rotating bar 5 positioned at circular hole 11 are provided with scale 10.
Circular hole 11 is provided with multiple altogether, and spacing is equal between any two for multiple circular holes 11, the angle of the first big arc 2 with
The angle of second largest arc 21 is consistent, it is characterised in that the diameter of small arc 1 is smaller than the diameter of the first big arc 2
10cm, the first big arc 2 is consistent with the structure of second largest arc 21, and the first big arc 2 and second largest arc 21
Vertical center line on rotary shaft 6 is symmetrical, and scale 10 is provided with the first ruler 3 and the second ruler 31.
The behind of rotary shaft 6, which is provided with, buckles 4, when not in use, the first big ruler 3 of arc 2 and first is shunk, so
Afterwards by buckling 4 wall hangings on the wall, can saving space, the teacher offers convenience simultaneously.
Operation principle：In use, working as user needs picture bowlder, pen is placed into corresponding circular hole 11 as needed, so
Rotary motion bar can draw corresponding circle in 5 one weeks afterwards, when needing picture arc or needing angulation, slide the first big arc
Plate 2, then slided on arc groove 7 of the sliding block of the first big behind of arc 2 on second largest arc 21, then pass through buckle
8 and neck 9 be fixed, then user's rotary motion bar 5 as needed draws required arc, or by its
Use as protractor and also may be used.
The foregoing is only a preferred embodiment of the present invention, but protection scope of the present invention be not limited thereto,
Any one skilled in the art the invention discloses technical scope in, technique according to the invention scheme and its
Inventive concept is subject to equivalent substitution or change, should all be included within the scope of the present invention.
Claims (6)
1. a kind of contraction type teaching drawing ruler, including small arc (1), the first big arc (2) and rotating bar (5), it is special
Sign is that the top side of the rotating bar (5) is provided with the first big arc (2), and the back of the first big arc (2) leads to
Cross sliding block to be slidably connected with the arc groove (7) on second largest arc (21), the side of the first big arc (2) is set
There is the neck (9) for being connected with second largest arc (21) side buckle (8), be located at the first big arc on the rotating bar (5)
The bottom of shape plate (2) is provided with small arc (1), and the bottom of the rotating bar (5) passes through rotary shaft (6) and the first ruler (3)
Rotation connection, and the back of the first ruler (3) is connected by sliding block with the slide on the second ruler (31), the rotary shaft
(6) back is provided with for fixing buckling (4) for drawing ruler, is offered on the appearance wall of the rotating bar (5) for aiding in
The circular hole (11) of circle is drawn, and the both sides on the appearance wall of rotating bar (5) positioned at circular hole (11) are provided with scale (10).
2. a kind of contraction type teaching drawing ruler according to claim 1, it is characterised in that the circular hole (11) is set altogether
Have multiple, and spacing is equal between any two for multiple circular holes (11).
A kind of 3. contraction type teaching drawing ruler according to claim 1, it is characterised in that the first big arc
(2) angle is consistent with the angle of second largest arc (21).
4. a kind of contraction type teaching drawing ruler according to claim 1, it is characterised in that the small arc (1)
Diameter is smaller 10cm than the diameter of the first big arc (2).
A kind of 5. contraction type teaching drawing ruler according to claim 1, it is characterised in that the first big arc
(2) it is consistent with the structure of second largest arc (21), and the first big arc (2) and second largest arc (21) are on rotary shaft
(6) vertical center line is symmetrical.
A kind of 6. contraction type teaching drawing ruler according to claim 1, it is characterised in that first ruler (3) with
Scale (10) is provided with second ruler (31).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710762047.5A CN107471867A (en) | 2017-08-30 | 2017-08-30 | A kind of contraction type teaching drawing ruler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710762047.5A CN107471867A (en) | 2017-08-30 | 2017-08-30 | A kind of contraction type teaching drawing ruler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107471867A true CN107471867A (en) | 2017-12-15 |
Family
ID=60603191
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710762047.5A Withdrawn CN107471867A (en) | 2017-08-30 | 2017-08-30 | A kind of contraction type teaching drawing ruler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107471867A (en) |
-
2017
- 2017-08-30 CN CN201710762047.5A patent/CN107471867A/en not_active Withdrawn
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20171215 |
|
| WW01 | Invention patent application withdrawn after publication |