CN215153454U - Drawing instrument for teaching - Google Patents
Drawing instrument for teaching Download PDFInfo
- Publication number
- CN215153454U CN215153454U CN202120498615.7U CN202120498615U CN215153454U CN 215153454 U CN215153454 U CN 215153454U CN 202120498615 U CN202120498615 U CN 202120498615U CN 215153454 U CN215153454 U CN 215153454U
- Authority
- CN
- China
- Prior art keywords
- ruler
- positioning
- limiting groove
- fan
- shaped base
- 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.)
- Expired - Fee Related
Links
- 230000000149 penetrating effect Effects 0.000 claims abstract 2
- 239000011324 bead Substances 0.000 claims description 4
- 230000004075 alteration Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Landscapes
- Drawing Aids And Blackboards (AREA)
Abstract
The utility model discloses a drawing instrument for teaching, which comprises a fan-shaped base, wherein the edge of the fan-shaped base is provided with angle scales, a positioning ruler is extended from one side edge of the fan-shaped base, the center of the positioning ruler is provided with a limiting groove A along the length direction, the central line of the limiting groove A is aligned with the zero scale mark of the angle scales, the circle center of the fan-shaped base is provided with a rotating shaft, a ruler is arranged on the rotating shaft in a penetrating way, and the top end of the rotating shaft is fixed with a handle; the ruler is characterized in that a limiting groove B is formed in the center of the ruler along the length direction of the ruler, length scales are formed in one side of the upper surface of the ruler, a positioning device capable of sliding along the ruler is mounted on the ruler, a clamping hole with the diameter being the same as the width of the limiting groove B is vertically formed in the positioning device, and the clamping hole is located right above the limiting groove B. The utility model discloses simple structure, integrated multiple drawing function can realize that the fixed length is drawn circle or circular arc, straight line, angle etc. adopt spacing groove A and spacing groove B's axis to fix a position, and the line of drawing is more straight.
Description
Technical Field
The utility model relates to a teaching instrument technical field, in particular to drawing instrument is used in teaching.
Background
When teaching such as mathematics or physics is carried out, drawing instruments are often needed to be used, the functions of the existing drawing instruments are single, multiple drawing instruments are often needed to be used simultaneously in actual use, and when particularly drawing an arc or a circle, the radian and the diameter of the arc cannot be determined by the existing compasses, and accurate drawing cannot be realized.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to provide a drawing instrument is used in teaching to solve the technical problem in the above-mentioned background art.
The technical scheme of the utility model is that:
a drawing instrument for teaching comprises a fan-shaped base, wherein angle scales are arranged on the edge of the fan-shaped base, a positioning ruler extends out of one side edge of the fan-shaped base, a limiting groove A is formed in the center of the positioning ruler along the length direction of the positioning ruler, the center line of the limiting groove A is aligned with a zero scale mark of the angle scales, a rotating shaft is arranged in the center of the fan-shaped base, a straight ruler penetrates through the rotating shaft, and a handle is fixed at the top end of the rotating shaft; the ruler is characterized in that a limiting groove B is formed in the center of the ruler along the length direction of the ruler, length scales are formed in one side of the upper surface of the ruler, a positioning device capable of sliding along the ruler is mounted on the ruler, a clamping hole with the diameter being the same as the width of the limiting groove B is vertically formed in the positioning device, and the clamping hole is located right above the limiting groove B.
Furthermore, the initial position of the limiting groove B is larger than the length of the positioning ruler.
Furthermore, the positioning device adopts a slide block, two side surfaces of the ruler are provided with guide rails, the slide block slides along the guide rails, and the clamping hole is positioned in the center of the slide block.
Furthermore, a fastening bolt is arranged on one side of the sliding block.
Furthermore, an observation port is reserved on one side, located on the length scale, of the sliding block, and a sight bead is arranged in the observation port.
Furthermore, a positioning bolt is arranged on the ruler close to the root of the ruler, and a positioning hole corresponding to the positioning bolt is formed in the fan-shaped base.
The utility model discloses an useful part lies in:
the utility model discloses simple structure, integrated multiple drawing function can realize fixed length drawing circle or circular arc, not only can confirm the diameter of circular arc, and the angle of circular arc can be confirmed fast, but also can regard as the ruler to use, can also draw the angle etc. adopt spacing groove A and spacing groove B's axis to fix a position, to the chalk fix a position more accuracy, the line of drawing simultaneously is also straighter, positioner can fix a position the chalk in a certain scale position of ruler, be convenient for draw circular arc or circle.
Drawings
FIG. 1 is a schematic perspective view of the present invention;
fig. 2 is an enlarged schematic view of a portion a in fig. 1.
In the figure: 1-fan-shaped base, 11-angle scale, 12-rotating shaft, 13-handle, 2-positioning ruler, 21-limiting groove A, 3-straight ruler, 31-length scale, 32-limiting groove B, 33-guide rail, 4-positioning bolt, 41-positioning hole, 5-sliding block, 51-clamping hole, 52-observation hole, 53-sight bead and 54-fastening bolt.
Detailed Description
The following describes the present invention with reference to the accompanying drawings. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. In addition, the technical features related to the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
As shown in fig. 1-2:
a drawing instrument for teaching comprises a fan-shaped base 1, wherein angle scales 11 are arranged on the edge of the fan-shaped base 1, a positioning ruler 2 extends out of one side edge of the fan-shaped base 1, a limiting groove A21 is arranged in the center of the positioning ruler 2 along the length direction of the positioning ruler, the central line of the limiting groove A21 is aligned with the zero scale line of the angle scales 11 (recommended to be 90-145 degrees, so that arcs or angles of all radians can be drawn), a rotating shaft 12 is arranged at the center of the fan-shaped base 1, a straight ruler 3 penetrates through the rotating shaft 12, and a handle 13 is fixed at the top end of the rotating shaft 12; the center of the ruler 3 is provided with a limiting groove B32 along the length direction, one side of the upper surface of the ruler 3 is provided with length scales 31, the ruler 3 is provided with a positioning device capable of sliding along the ruler, the positioning device is vertically provided with a clamping hole 51 with the diameter being the same as the width of the limiting groove B32, and the clamping hole 51 is positioned right above the limiting groove B32.
Specifically, because the straight edge 3 rotates over the positioning rule 2 during rotation, the radius of the drawn circle or arc needs to be larger than that of the positioning rule 2, and the initial position of the limiting groove B32 is larger than the length of the positioning rule 2.
Specifically, the positioning device adopts a slide block 5, two side surfaces of the ruler 3 are provided with guide rails 33, the slide block 5 slides along the guide rails 33, and the clamping hole 51 is positioned in the center of the slide block 5.
Specifically, a fastening bolt 54 is provided at one side of the slider 5 to fix the slider 5 at a desired scale position.
Specifically, a viewing port 52 is reserved on one side of the length scale 31 of the slide block 5, and a sight bead 53 is arranged in the viewing port 52, so that the scale is convenient to observe and position.
Specifically, the ruler 3 is provided with the positioning bolt 4 near the root thereof, the fan-shaped base 1 is provided with the positioning hole 41 corresponding to the positioning bolt 4, and when the ruler 3 is only needed to be used, the positioning bolt 4 can be screwed into the positioning hole 41, so that the ruler 3 is prevented from rotating.
The utility model discloses simple structure, integrated multiple drawing function can realize fixed length drawing circle or circular arc, not only can confirm the diameter of circular arc, and the angle of circular arc can be confirmed fast, and can also regard as ruler 3 to use, can also draw the angle etc. adopt spacing groove A21 and spacing groove B32's axis to fix a position, to the chalk fix a position more accuracy, the line of drawing simultaneously is also more straight, positioner can fix a position the chalk in a certain scale position of ruler 3, be convenient for draw circular arc or circle.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. It will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made in the embodiments without departing from the principles and spirit of the invention, and the scope of the invention is to be accorded the full scope of the claims.
Claims (6)
1. A drawing instrument for teaching, which is characterized in that: the angle scale is arranged on the edge of the fan-shaped base, a positioning ruler extends out of one side edge of the fan-shaped base, a limiting groove A is formed in the center of the positioning ruler along the length direction of the positioning ruler, the center line of the limiting groove A is aligned with the zero scale mark of the angle scale, a rotating shaft is arranged in the center of the fan-shaped base, a ruler is arranged on the rotating shaft in a penetrating mode, and a handle is fixed to the top end of the rotating shaft; the ruler is characterized in that a limiting groove B is formed in the center of the ruler along the length direction of the ruler, length scales are formed in one side of the upper surface of the ruler, a positioning device capable of sliding along the ruler is mounted on the ruler, a clamping hole with the diameter being the same as the width of the limiting groove B is vertically formed in the positioning device, and the clamping hole is located right above the limiting groove B.
2. A teaching drawing instrument as claimed in claim 1, wherein: the initial position of the limit groove B is larger than the length of the positioning ruler.
3. A teaching drawing instrument as claimed in claim 1, wherein: the positioning device adopts a slide block, two side surfaces of the ruler are provided with guide rails, the slide block slides along the guide rails, and the clamping hole is positioned in the center of the slide block.
4. A teaching drawing instrument as claimed in claim 3, wherein: and a fastening bolt is arranged on one side of the sliding block.
5. A teaching drawing instrument as claimed in claim 3, wherein: an observation port is reserved on one side, located on the length scale, of the sliding block, and a sight bead is arranged in the observation port.
6. A teaching drawing instrument as claimed in any one of claims 1 to 5, wherein: the ruler is provided with a positioning bolt close to the root of the ruler, and the fan-shaped base is provided with a positioning hole corresponding to the positioning bolt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120498615.7U CN215153454U (en) | 2021-03-09 | 2021-03-09 | Drawing instrument for teaching |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120498615.7U CN215153454U (en) | 2021-03-09 | 2021-03-09 | Drawing instrument for teaching |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215153454U true CN215153454U (en) | 2021-12-14 |
Family
ID=79414558
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120498615.7U Expired - Fee Related CN215153454U (en) | 2021-03-09 | 2021-03-09 | Drawing instrument for teaching |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215153454U (en) |
-
2021
- 2021-03-09 CN CN202120498615.7U patent/CN215153454U/en not_active Expired - Fee Related
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9599447B2 (en) | Large T-square protractor for use in construction | |
| US10335941B2 (en) | Marking template tool | |
| CN110001244B (en) | Multifunctional measuring line drawing ruler | |
| US20160023502A1 (en) | System and a method for drawing arcs and circle | |
| CN215153454U (en) | Drawing instrument for teaching | |
| US6405443B1 (en) | Geometric construction device | |
| US4843719A (en) | Pair of measuring compasses | |
| GB2097943A (en) | Marking-out tool | |
| US4462168A (en) | Variable angle straight edge | |
| CN202463351U (en) | Multi-angle perspectograph | |
| CN211106598U (en) | Multifunctional mathematical teaching aid for teaching | |
| US3781995A (en) | Compasses | |
| KR200450940Y1 (en) | A multifunctional protractor with functions of ruler, compasses and protractor | |
| US4355471A (en) | Squareangle | |
| US20070119064A1 (en) | Universal Measuring Apparatus and Associated Methods | |
| US4734992A (en) | Drawing instrument | |
| CN105538969A (en) | Graduation ruler with compasses and protractor | |
| CN105150725A (en) | Multifunctional teaching aid for math class | |
| JPH09207496A (en) | Multifunctional ruler | |
| CN217259335U (en) | Compasses with graduation function | |
| CN219154099U (en) | Multifunctional stationery | |
| CN217835203U (en) | Multifunctional ruler | |
| RU155986U1 (en) | DRAWING AND MEASURING TOOL | |
| CN213984812U (en) | Protractor for students | |
| CN221417810U (en) | Drawing device for mathematical education |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20211214 |