CN201913956U - Blackboard writing tool for teachers - Google Patents
Blackboard writing tool for teachers Download PDFInfo
- Publication number
- CN201913956U CN201913956U CN2011200035888U CN201120003588U CN201913956U CN 201913956 U CN201913956 U CN 201913956U CN 2011200035888 U CN2011200035888 U CN 2011200035888U CN 201120003588 U CN201120003588 U CN 201120003588U CN 201913956 U CN201913956 U CN 201913956U
- Authority
- CN
- China
- Prior art keywords
- ruler
- straight plate
- teachers
- locking bolt
- ring set
- 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
Landscapes
- Drawing Aids And Blackboards (AREA)
Abstract
The utility model discloses a blackboard writing tool for teachers, which comprises a ruler with scales. A positioning bar is arranged on the position of mark '0', one end of the positioning bar is conical, and an angle index disk is installed on the positioning bar. The ruler is provided with a tracking slot parallel with the scales of the ruler. A moving loop cover is disposed inside the tracking slot and is provided with a locking bolt. The locking bolt is arranged on one side of the ruler, and the moving loop cover is arranged on the other side of the ruler. Writing chalk is mounted in the moving loop cover. The blackboard writing tool for teachers has the advantages of solving defects existing in public technique, collecting functions of rulers, compasses and set squares in order to draw lines, circles and fixed included angles, being capable of drawing a circle of a preset radius due to a length control device, ensuring drawing effects because of the locking bolt and a position for fastening positioning writing chalk, being convenient to use, especially for teaching use, reducing producing costs and being carried easily.
Description
Technical field
The utility model relates to the teaching aid field, specifically is a kind of teacher's writing on the blackboard apparatus.
Background technology
At present, in teaching field, when serving as a teacher on blackboard graphing; usually can use ruler, compasses, set square etc., wherein utilize ruler to draw straight line, it is circular to utilize compasses to draw; utilize set square to draw the line of certain angle, and the three can't substitute mutually.This will teacher of the seeking advice in teaching, must carry many cover teaching aids, carry inconvenience.Simultaneously, existing compasses for teaching can't sizing be drawn circle, must be earlier draws behind the length straight line of required radius of circle with straight plate, chooses radius with compasses according to this straightway again and carries out that picture is round to be operated, and is very loaded down with trivial details, wasted instructional blocks of time.
The utility model content
The purpose of this utility model is to provide a kind of teacher's writing on the blackboard apparatus, and it is integrated in one with ruler function, compasses function, set square, can realize straight line, circle and decide the drafting of angle angle, be provided with length control device, can draw and specify the circle of radius, easy to use, be easy to teaching and use.
The utility model for achieving the above object, be achieved through the following technical solutions: a kind of teacher's writing on the blackboard apparatus, comprise straight plate, straight plate is provided with the length scale, backstay is installed at " 0 " scale place, backstay one end is a cone tip shape, setting angle dial on the backstay, on straight plate, offer rail groove, rail groove is parallel with the scale face of straight plate, and mobile ring set is installed in the rail groove, and shift(ing) ring puts the installation clamping screw, clamping screw and mobile ring set lay respectively at straight plate both sides, and lettering pen is installed in the mobile ring set.
Advantage of the present utility model is: can solve the deficiency that exists in the known technology; Ruler function, compasses function, set square are integrated in one, can realize straight line, circle and decide the drafting of angle angle; Be provided with length control device, can draw and specify the circle of radius size; Be provided with clamping screw, lettering pen position, location that can be fastening guarantees drawing effect; Easy to use, be easy to teaching and use; Low cost of manufacture is easy to carry about with one etc.
Description of drawings
Accompanying drawing 1 is a structural representation of the present utility model.
Label shown in the accompanying drawing: 1, backstay; 2, length scale; 3, straight plate; 4, rail groove; 5, lettering pen; 6, mobile ring set; 7, angle dial.
The specific embodiment
Below in conjunction with specific embodiment, further set forth the utility model.Should be understood that these embodiment only to be used to the utility model is described and be not used in the restriction scope of the present utility model.Should be understood that in addition those skilled in the art can make various changes or modifications the utility model after the content of having read the utility model instruction, these equivalent form of values fall within the application's appended claims institute restricted portion equally.
A kind of teacher's writing on the blackboard apparatus described in the utility model, agent structure comprises straight plate 3, and described straight plate 3 is used ruler for teaching, and its length overall is at 75cm-100cm.On straight plate 3, be provided with length scale 2, backstay 1 is installed at " 0 " scale place.Backstay 1 can use as the center of circle, backstay 1 general bolt, screw or the tapered rod of adopting, and preferred tapered rod, its tip and clamping screw are positioned at the same side of straight plate 3, and the tapered rod location is more accurate.Setting angle dial 7 on backstay 1, angle dial 7 keeps motionless with backstay 1, can measure the anglec of rotation of straight plate 3, thereby draws two lines or the circular arc of different angles.Offer rail groove 4 on straight plate 3, described rail groove 4 is parallel with the scale face of straight plate 3.Mobile ring set 6 is installed in the rail groove 4, on the mobile ring set 6 clamping screw is installed, clamping screw and mobile ring set 6 lay respectively at straight plate 3 both sides, utilize clamping screw and mobile ring set 6 to cooperate, can make mobile ring set 6 along rail groove 4 translations, when lettering pen arrives predetermined graduated, tighten clamping screw, fix.In the mobile ring set 6 lettering pen 5 is installed.
Claims (1)
1. teacher's writing on the blackboard apparatus, it is characterized in that: comprise straight plate (3), straight plate (3) is provided with length scale (2), backstay (1) is installed at " 0 " scale place, backstay (1) one end is a cone tip shape, backstay (1) is gone up setting angle dial (7), on straight plate (3), offer rail groove (4), rail groove (4) is parallel with the scale face of straight plate (3), mobile ring set (6) is installed in the rail groove (4), mobile ring set (6) is gone up clamping screw is installed, and clamping screw and mobile ring set (6) lay respectively at straight plate (3) both sides, and lettering pen (5) is installed in the mobile ring set (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200035888U CN201913956U (en) | 2011-01-07 | 2011-01-07 | Blackboard writing tool for teachers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200035888U CN201913956U (en) | 2011-01-07 | 2011-01-07 | Blackboard writing tool for teachers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201913956U true CN201913956U (en) | 2011-08-03 |
Family
ID=44413770
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200035888U Expired - Fee Related CN201913956U (en) | 2011-01-07 | 2011-01-07 | Blackboard writing tool for teachers |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201913956U (en) |
-
2011
- 2011-01-07 CN CN2011200035888U patent/CN201913956U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110803 Termination date: 20120107 |
|
| DD01 | Delivery of document by public notice |
Addressee: Wu Shaodong Document name: Notification of Termination of Patent Right |