CN217671911U - Teaching ruler - Google Patents
Teaching ruler Download PDFInfo
- Publication number
- CN217671911U CN217671911U CN202221975844.4U CN202221975844U CN217671911U CN 217671911 U CN217671911 U CN 217671911U CN 202221975844 U CN202221975844 U CN 202221975844U CN 217671911 U CN217671911 U CN 217671911U
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- teaching ruler
- digital display
- magnet
- hole
- cylindrical pin
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Abstract
The utility model relates to the technical field of teaching aids, the existing teaching ruler has the defect of difficult operation when drawing circular arcs, the utility model provides a teaching ruler, which comprises a body and a digital display angle gauge detachably connected with the body; one end of the body is provided with a positioning piece which is used as a circle center on a blackboard when an arc is drawn, and the body is provided with a plurality of second through holes through which chalk can pass to draw; the through holes are linearly arranged along the length direction of the body; various arcs can be drawn conveniently.
Description
Technical Field
The utility model relates to a teaching aid technical field, concretely relates to teaching ruler.
Background
The existing teaching ruler can only draw a straight line on a blackboard, if a circle or an arc is to be drawn, the compasses are needed to be used, when the compasses are used for drawing a circle on the blackboard, the compasses are erected on the surface of the blackboard, the operation is very inconvenient, and especially when the drawn circle is located at a high position, the operation of lifting an arm is not easy.
Therefore, teachers design that a string and chalk are used for drawing circles instead of compasses. However, the arc with a fixed angle cannot be drawn in this way, and after the arc is drawn, the arc with a required angle can be cut off by means of a digital display angle meter. Therefore, the operation steps are relatively complicated and inconvenient, and a teaching ruler capable of drawing various arcs conveniently is needed.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that overcome above-mentioned current teaching ruler and have the difficult defect of operation when drawing the circular arc, the utility model provides a teaching ruler can conveniently draw various circular arcs.
In order to achieve the above object, the utility model discloses a following technical scheme can realize: a teaching ruler comprises a body and a digital display angle gauge detachably connected with the body; one end of the body is provided with a positioning piece which is used as a circle center on a blackboard when an arc is drawn, and the body is provided with a plurality of second through holes through which chalk can pass to draw; the plurality of through holes are linearly arranged along the length direction of the body.
The utility model discloses further preferred scheme does: one end of the body is provided with a first through hole, the positioning piece is a cylindrical pin, and the cylindrical pin is rotatably arranged in the first through hole.
The utility model discloses further preferred scheme does: the cylindrical pin is a permanent magnet and is attached to the surface of the blackboard when the cylindrical pin is close to the blackboard.
The utility model discloses further preferred scheme does: one end of the cylindrical pin is provided with a pressing cap for facilitating operation of a user.
The utility model discloses further preferred scheme does: and a gasket is arranged at the other end of the cylindrical pin and is fixedly connected with the end part of the cylindrical pin so as to prevent the cylindrical pin from being separated from the first through hole.
The utility model discloses further preferred scheme does: the body with digital display angle appearance go up the branch and be equipped with a pair of magnetism and inhale the piece, both inhale fixedly through magnetism.
The utility model discloses further preferred scheme does: the magnetic attraction piece comprises a first magnet and a second magnet, the first magnet is embedded in the fixing hole of the body, and the second magnet is arranged on the back face of the digital display angle gauge.
The utility model discloses further preferred scheme does: the back of the digital display angle gauge is provided with a positioning groove used for being matched with the first magnet to limit the digital display angle gauge to swing.
The utility model discloses further preferred scheme does: a cylindrical sleeve is arranged in the second through hole and rotatably sleeved in the second through hole; and two ends of the cylindrical sleeve are provided with outward flanges for axial limiting.
The utility model discloses further preferred scheme does: the cylindrical pin is arranged in a hollow mode and is used for enabling chalk to penetrate through conveniently.
To sum up, the utility model discloses following beneficial effect has: set up the setting element on the teaching ruler body and can supply the chalk to pass the through-hole of setting-out to and demountable installation's digital display angular instrument, can draw the circular arc of random angle, and draw process easy operation, it is very convenient.
Drawings
Fig. 1 is an exploded view of the teaching ruler of the present embodiment.
Fig. 2 is a top view of the teaching ruler of the present embodiment.
Fig. 3 isbase:Sub>A sectional view taken alongbase:Sub>A-base:Sub>A in fig. 2.
Fig. 4 is a cross-sectional view of the teaching ruler along its length, the cross-section being through a second through hole, in another embodiment.
Wherein: 100. a body; 110. a positioning member; 120. a first through hole; 130. a second through hole; 140. a first magnet; 150. a fixing hole; 160. a cylindrical sleeve; 200. a digital display angle gauge; 210. and (6) positioning a groove.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications without inventive contribution to the present embodiment as required after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.
As shown in fig. 1 to 3, the present embodiment shows a teaching ruler, which includes a body 100 and a digital display goniometer 200 detachably connected to the body 100. The body 100 is illustrated as a ruler, but a set square can be used as an alternative, and the digital display angle gauge 200 can be disposed on a right-angle side of the set square.
The digital display angle gauge 200 of the present embodiment is an existing product, and includes two level tubes perpendicular to each other, which can be used for measuring a horizontal plane. A digital display screen is arranged between the two leveling tubes, and the digital display screen can be used for displaying the current angle or measuring the angle between two straight lines by operating a button, the measuring function of the digital display angle gauge is not improved in the embodiment, and the improvement is only in the fixing mode between the shell of the digital display angle gauge 200 and the body 100. Through set up a pair of magnetism between body 100 with digital display angle appearance 200 and inhale the piece, let both inhale fixedly through magnetism, convenient dismantlement installation.
In this embodiment, one end of the body 100 is provided with a positioning element 110 used as a circle center on a blackboard when drawing an arc, and the body 100 is provided with a plurality of second through holes 130 through which a chalk can pass to draw. The plurality of through holes are linearly arranged along a length direction of the body 100.
When the teaching ruler is used for drawing a circular arc with a fixed angle, the body 100 can be placed on the surface of a blackboard, the digital display angle gauge 200 is started to obtain the angle of the current body 100, then the fixing piece at one end of the body 100 is pressed by a hand to be fixed on the surface of the blackboard, and then chalk is placed in one of the second through holes 130 in the body 100 to slowly rotate the body 100. When the main body 100 rotates around the fixing member, the path of the chalk on the blackboard draws an arc. In the drawing process, the eyes see the angle displayed on the digital goniometer 200, and when the angle changes to a preset target value along with the rotation, the rotation of the body 100 is stopped, and a desired arc can be obtained. Wherein the size of the drawn arc is determined by selecting an appropriate second through hole 130.
Specifically, a first through hole 120 is formed at one end of the body 100, and the positioning element 110 is a cylindrical pin rotatably disposed in the first through hole 120.
In order to fix the positioning member 110 on the blackboard, the cylindrical pin is a permanent magnet in this embodiment, and is attached to the surface of the blackboard when the blackboard is closed. Furthermore, one end of the cylindrical pin is provided with a pressing cap, and the surface of the pressing cap is a concave arc surface so as to facilitate the operation of a user. In addition, a gasket is disposed at the other end of the cylindrical pin, and the gasket is fixedly connected to the end of the cylindrical pin to prevent the cylindrical pin from being separated from the first through hole 120.
It should be noted that in another embodiment, the cylindrical pin may be hollow to facilitate the passage of chalk, and accordingly, a pressing cap is not required, and will not be described in detail herein.
In this embodiment, the magnetic member between the main body 100 and the digital display angle gauge 200 includes a first magnet 140 and a second magnet, the first magnet 140 is embedded in the fixing hole 150 of the main body 100, and the second magnet is disposed on the back of the digital display angle gauge 200. Preferably, the housing of the digital display angle gauge 200 is made of a magnetic conductive material, and when the housing is close to the first magnet 140, the housing is magnetized to form a second magnet (or a permanent magnet is arranged on the back of the housing to serve as the second magnet, or the permanent magnet is arranged on the back of the housing).
In order to prevent the digital display angle gauge 200 from being freely moved after being fixed to the first magnet 140 by adsorption to affect the measurement of the angle. In this embodiment, the back of the digital display angle gauge 200 is provided with a positioning groove 210, the positioning groove 210 has a certain depth, when the digital display angle gauge 200 is attached to the surface of the main body 100, the second magnet protrudes out of the surface of the main body 100 and extends into the positioning groove 210, and the second magnet abuts against the peripheral wall of the positioning groove 210 to cooperate with the first magnet 140 to limit the swing of the digital display angle gauge 200.
In another embodiment, as shown in fig. 4, a cylindrical sleeve 160 may be further disposed in the second through hole 130, and the cylindrical sleeve 160 is rotatably disposed in the second through hole 130. Two ends of the cylindrical sleeve 160 are provided with outward flanges for axial limiting. With the arrangement, all the cylindrical sleeves 160 can function as the positioning part 110, and any one of the cylindrical sleeves 160 can be used as the positioning part 110 when drawing an arc, so that the operation diversity is increased.
Claims (10)
1. A teaching ruler is characterized by comprising a body and a digital display angle gauge detachably connected with the body; one end of the body is provided with a positioning piece which is used as a circle center on a blackboard when an arc is drawn, and the body is provided with a plurality of second through holes through which chalk can pass to draw; the plurality of through holes are linearly arranged along the length direction of the body.
2. The teaching ruler of claim 1, wherein a first through hole is formed at one end of the body, the positioning member is a cylindrical pin, and the cylindrical pin is rotatably disposed in the first through hole.
3. A teaching ruler according to claim 2 wherein the pin is a permanent magnet adapted to adhere to the surface of the blackboard when placed adjacent the blackboard.
4. A teaching ruler as claimed in claim 3 wherein one end of the cylindrical pin is provided with a press cap for convenient operation by a user.
5. A teaching ruler according to claim 4 wherein the other end of the cylindrical pin is provided with a spacer fixedly connected to the end of the cylindrical pin for preventing the cylindrical pin from being disengaged from the first through hole.
6. The teaching ruler of claim 1, wherein the body and the digital display angle gauge are respectively provided with a pair of magnetic attraction pieces, and the body and the digital display angle gauge are fixed by the magnetic attraction pieces in an attracting manner.
7. The teaching ruler of claim 6, wherein the magnetic member comprises a first magnet and a second magnet, the first magnet is embedded in the fixing hole of the body, and the second magnet is arranged on the back of the digital display goniometer.
8. The teaching ruler of claim 7, wherein the back of the digital display angle gauge is provided with a positioning groove for matching with the first magnet to limit the swing of the digital display angle gauge.
9. The teaching ruler of claim 1, wherein a cylindrical sleeve is arranged in the second through hole and rotatably arranged in the second through hole; and two ends of the cylindrical sleeve are respectively provided with an outward flange for axial limiting.
10. A teaching ruler according to claim 2 wherein the cylindrical pin is hollow to facilitate passage of chalk therethrough.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221975844.4U CN217671911U (en) | 2022-07-28 | 2022-07-28 | Teaching ruler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221975844.4U CN217671911U (en) | 2022-07-28 | 2022-07-28 | Teaching ruler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217671911U true CN217671911U (en) | 2022-10-28 |
Family
ID=83718888
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221975844.4U Active CN217671911U (en) | 2022-07-28 | 2022-07-28 | Teaching ruler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217671911U (en) |
-
2022
- 2022-07-28 CN CN202221975844.4U patent/CN217671911U/en active Active
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