CN204526544U - A kind of compasses for teaching - Google Patents
A kind of compasses for teaching Download PDFInfo
- Publication number
- CN204526544U CN204526544U CN201420783966.2U CN201420783966U CN204526544U CN 204526544 U CN204526544 U CN 204526544U CN 201420783966 U CN201420783966 U CN 201420783966U CN 204526544 U CN204526544 U CN 204526544U
- Authority
- CN
- China
- Prior art keywords
- upper bush
- cross bar
- spring
- support
- compasses
- 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
Abstract
The utility model relates to a kind of compasses for teaching, comprise column, cross bar and chalk clamp, described column comprises upper bush, spring and support, fixture is provided with in described upper bush, the bottom of upper bush inner chamber is located at by spring, and spring upper end is fixed on fixture, the upper end of described support penetrates the inner chamber of upper bush from the bottom of upper bush, and be connected and fixed with the bottom of spring, the lower end of described support is in upper bush lumen outer, described cross bar is vertically mounted on the outer wall of upper bush, described chalk clamp comprises body, clamping device and push against bolt, body is provided with the perforation matched with cross bar, body is slidably mounted on cross bar by perforation, described clamping device is arranged on the bottom of body, the described bolt that pushes against is arranged on body by screwed hole, and push against bolt one end and be in external, the other end is pushed against on the outer surface of cross bar.The utility model is convenient to use, and when drawing circle or drawing arc, line accurately, and not easily makes chalk rupture.
Description
Technical field
The utility model relates to instruction and office articles for use field, particularly relates to a kind of compasses for teaching.
Background technology
Compasses, in mathematics and drawing, are used to the instrument drawing circle or string, are usually used in construction with ruler and compasses.
In prior art, teaching compasses, due to be adopt chalk as scoring tool, at blackboard upper drawing circle or picture camber line, when the circumference drawn is excessive, chalk can along with the processes shrink of line, thus make picture circle irregular, cause picture justify unsuccessfully, docking particularly at picture camber line and camber line, when camber line is long, when center of circle rate is fixed, be easy to cause not docking between camber line, thus cause line inaccurate, and when picture circle, be easy to chalk is ruptured, bother very much.
Utility model content
In view of this, be necessary to provide a kind of line accurately, and not easily make chalk rupture compasses for teaching.
The utility model realizes like this, a kind of compasses for teaching, comprise column, cross bar and chalk clamp, described column comprises upper bush, spring and support, fixture is provided with in described upper bush, the bottom of upper bush inner chamber is located at by spring, and spring upper end is fixed on fixture, the upper end of described support penetrates the inner chamber of upper bush from the bottom of upper bush, and be connected and fixed with the bottom of spring, the lower end of described support is in upper bush lumen outer, described cross bar is vertically mounted on the outer wall of upper bush, described chalk clamp comprises body, clamping device and push against bolt, body is provided with the perforation matched with cross bar, body is slidably mounted on cross bar by perforation, described clamping device is arranged on the bottom of body, the described bolt that pushes against is arranged on body by screwed hole, and push against bolt one end and be in external, the other end is pushed against on the outer surface of cross bar.
Further, the top of described upper bush is provided with hand rod.
Further, the lower end of described support is provided with sucker, is provided with rotating shaft between described sucker and support, and described sucker is arranged on the bottom of support by described axis of rotation.
Further, described cross bar is provided with graduated scale.
The advantage of a kind of compasses for teaching that the utility model provides is: the utility model is simply rational in infrastructure, by arranging the cross bar perpendicular to upper bush, and chalk clamp is set on cross bar, and spring is set in upper bush, and support is fixed on the fixture in upper bush by spring, in use, directly chalk is fixed in chalk clamp, chalk clamp is moved on to the relevant position on cross bar, the i.e. radius of circle or arc, at picture bowlder, directly pin upper bush, when chalk is in picture circle process, slowly shorten, cross bar can along with the shortening of chalk be slowly to blackboard panel displacement, due to the effect of spring, can regulate and control chalk is quickly and easily fitted on blackboard panel, and the pliability of spring, effectively can alleviate the dynamics of pressing, effectively prevent pressure excessive, cause in picture circle process, the phenomenon of chalk fracture occurs, practical reliable, moment can make the distance of chalk consistent with the distance in the center of circle, can not change because of the shortening of chalk, make picture circle accurately.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of compasses for teaching of the utility model.
Detailed description of the invention
In order to make the purpose of this utility model, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the utility model, and be not used in restriction the utility model.
Refer to Fig. 1, Fig. 1 is the structural representation of a kind of compasses for teaching of the utility model.
Described a kind of compasses for teaching, comprise column 10, cross bar 20 and chalk clamp 30, described column 10 comprises upper bush 11, spring 12 and support 13, fixture 111 is provided with in described upper bush 11, the bottom of upper bush 11 inner chamber is located at by spring 12, and spring 12 upper end is fixed on fixture 111, the upper end of described support 13 penetrates the inner chamber of upper bush 11 from the bottom of upper bush 11, and be connected and fixed with the bottom of spring 12, the lower end of described support 13 is in upper bush 11 lumen outer, described cross bar 20 is vertically mounted on the outer wall of upper bush 11, described chalk clamp 30 comprises body 31, clamping device 32 and push against bolt 33, body 31 is provided with the perforation 311 matched with cross bar 20, body 31 is slidably mounted on cross bar 20 by perforation 311, described clamping device 32 is arranged on the bottom of body 31, the described bolt 33 that pushes against is arranged on body 31 by screwed hole, and push against bolt 33 one end and be in outside body 31, the other end is pushed against on the outer surface of cross bar 20.
The top of described upper bush 11 is provided with hand rod 112, is convenient to picture bowlder, and user's hand grips.
The lower end of described support 13 is provided with sucker 131, rotating shaft 132 is provided with between described sucker 131 and support 13, described sucker 131 is rotatably installed in the bottom of support 13 by described rotating shaft 132, by sucker 131, being convenient to make support 13 to be fixed on circle centre position on blackboard, by arranging rotating shaft 132, being convenient at picture bowlder, compasses rotate, and sucker 131 can not be made to depart from blackboard panel.
Described cross bar 20 is provided with graduated scale 21, when being convenient to regulate picture circle or draw arc, determines radius of circle or arc radius.
The utility model is simply rational in infrastructure, by arranging the cross bar 20 perpendicular to upper bush 11, and chalk clamp 30 is set on cross bar 20, and spring 12 is set in upper bush 11, and support 13 is fixed on the fixture 111 in upper bush 11 by spring 12, in use, directly chalk is fixed in chalk clamp 30, chalk clamp 30 is moved on to the relevant position on cross bar 20, the i.e. radius of circle or arc, at picture bowlder, directly pin upper bush 11, when chalk is in picture circle process, slowly shorten, cross bar 20 can along with the shortening of chalk be slowly to blackboard panel displacement, due to the effect of spring 12, can regulate and control chalk is quickly and easily fitted on blackboard panel, and the pliability of spring 12, effectively can alleviate the dynamics of pressing, effectively prevent pressure excessive, cause in picture circle process, the phenomenon of chalk fracture occurs, practical reliable, moment can make the distance of chalk consistent with the distance in the center of circle, can not change because of the shortening of chalk, make picture circle accurately.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all do within spirit of the present utility model and principle any amendment, equivalent to replace and improvement etc., all should be included within protection domain of the present utility model.
Claims (4)
1. a compasses for teaching, it is characterized in that, comprise column (10), cross bar (20) and chalk clamp (30), described column (10) comprises upper bush (11), spring (12) and support (13), fixture (111) is provided with in described upper bush (11), the bottom of upper bush (11) inner chamber is located at by spring (12), and spring (12) upper end is fixed on fixture (111), the upper end of described support (13) penetrates the inner chamber of upper bush (11) from the bottom of upper bush (11), and be connected and fixed with the bottom of spring (12), the lower end of described support (13) is in upper bush (11) lumen outer, described cross bar (20) is vertically mounted on the outer wall of upper bush (11), described chalk clamp (30) comprises body (31), clamping device (32) and push against bolt (33), body (31) is provided with the perforation (311) matched with cross bar (20), body (31) is slidably mounted on cross bar (20) by perforation (311), described clamping device (32) is arranged on the bottom of body (31), the described bolt (33) that pushes against is arranged on body (31) by screwed hole, and push against bolt (33) one end and be in body (31) outward, the other end is pushed against on the outer surface of cross bar (20).
2. a kind of compasses for teaching according to claim 1, is characterized in that, the top of described upper bush (11) is provided with hand rod (112).
3. a kind of compasses for teaching according to claim 1, it is characterized in that, the lower end of described support (13) is provided with sucker (131), be provided with rotating shaft (132) between described sucker (131) and support (13), described sucker (131) is rotatably installed in the bottom of support (13) by described rotating shaft (132).
4. a kind of compasses for teaching according to claim 1, is characterized in that, described cross bar (20) is provided with graduated scale (21).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420783966.2U CN204526544U (en) | 2014-12-11 | 2014-12-11 | A kind of compasses for teaching |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420783966.2U CN204526544U (en) | 2014-12-11 | 2014-12-11 | A kind of compasses for teaching |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204526544U true CN204526544U (en) | 2015-08-05 |
Family
ID=53740589
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420783966.2U Expired - Fee Related CN204526544U (en) | 2014-12-11 | 2014-12-11 | A kind of compasses for teaching |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204526544U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107150533A (en) * | 2017-05-17 | 2017-09-12 | 曹祎 | A kind of ordered series of numbers helix drawing instrument |
| CN108995449A (en) * | 2018-08-03 | 2018-12-14 | 王建国 | Multifunctional compass is used in a kind of teaching |
-
2014
- 2014-12-11 CN CN201420783966.2U patent/CN204526544U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107150533A (en) * | 2017-05-17 | 2017-09-12 | 曹祎 | A kind of ordered series of numbers helix drawing instrument |
| CN108995449A (en) * | 2018-08-03 | 2018-12-14 | 王建国 | Multifunctional compass is used in a kind of teaching |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| 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: 20150805 Termination date: 20171211 |