CN201342876Y - Compass ruler for blackboard - Google Patents

Compass ruler for blackboard Download PDF

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Publication number
CN201342876Y
CN201342876Y CNU2009200102052U CN200920010205U CN201342876Y CN 201342876 Y CN201342876 Y CN 201342876Y CN U2009200102052 U CNU2009200102052 U CN U2009200102052U CN 200920010205 U CN200920010205 U CN 200920010205U CN 201342876 Y CN201342876 Y CN 201342876Y
Authority
CN
China
Prior art keywords
ruler
blackboard
square
flat ruler
flat
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
Application number
CNU2009200102052U
Other languages
Chinese (zh)
Inventor
赵展跃
Original Assignee
赵展跃
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 赵展跃 filed Critical 赵展跃
Priority to CNU2009200102052U priority Critical patent/CN201342876Y/en
Application granted granted Critical
Publication of CN201342876Y publication Critical patent/CN201342876Y/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

The utility model relates to a compass ruler for blackboard, which comprises a flat ruler and a set square, wherein an upper surface shaft on one end of the flat ruler is connected with one corner of the set square, a lower surface shaft is connected with a suction cup, and a through hole is arranged on one end of the flat ruler far away from the suction cup. The flat ruler and the set square can be used in necessary conditions, when circles are drawn, one end of the flat ruler can be absorbed on the surface of the blackboard through the suction cup, chalks can be inserted in the through hole on the other end of the flat ruler, then, the flat ruler can be rotated, and a circle can be drawn on the blackboard. The compass ruler for blackboard has the advantages that the structure is simple, the use is convenient, the conformation is rational, the transportation is convenient and the like, and greater convenience is brought for teachers to use.

Description

Blackboard compasses chi
Technical field
The utility model relates to a kind of teaching aid, especially a kind of blackboard compasses chi.
Background technology
Class hour on the instructors,, all be to use some teaching aids in order to tell about the content of course more intuitively, when especially carrying out several teaching or mathematical education, usually to use ruler, set square and compasses, and at present, these teaching aids use, carry and deposit all inconvenience for independently individual.
Summary of the invention
The purpose of this utility model has overcome above-mentioned said deficiency, and a kind of blackboard compasses chi is provided, and being used to solve existing ruler, set square and compasses teaching aid is independent individual, uses, deposits and carry the problem of inconvenience.
For achieving the above object, the utility model blackboard compasses chi comprises ruler and set square, connects a jiao of set square at an end upper surface axle of ruler, connects sucker at its following table over glaze, and is provided with open-work at ruler away from an end of sucker.
After adopting said structure, ruler and set square can use when needed; Draw bowlder, an end of ruler can be utilized sucker to be adsorbed on the surface of blackboard, chalk is inserted in the open-work of the ruler other end, rotate ruler then, circle can draw on blackboard.
The utility model has the advantages that: simple in structure, easy to use, structure is reasonable, easy to carry, brings greater convenience for the use of instructors.
Description of drawings
Fig. 1 is the overall structure schematic diagram of the utility model blackboard with the compasses chi.
The specific embodiment
As shown in Figure 1, the utility model blackboard compasses chi comprises ruler 1 and set square 2, connects a jiao of set square 2 at an end upper surface axle of ruler 1, connects sucker 3 at its following table over glaze, and is provided with open-work 4 at ruler 1 away from an end of sucker 3.

Claims (1)

1, a kind of blackboard compasses chi, comprise ruler (1) and set square (2), it is characterized in that: connect a jiao of set square (2) at an end upper surface axle of ruler (1), connect sucker (3), and be provided with open-work (4) away from an end of sucker (3) at ruler (1) at its following table over glaze.
CNU2009200102052U 2009-01-19 2009-01-19 Compass ruler for blackboard Expired - Fee Related CN201342876Y (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CNU2009200102052U CN201342876Y (en) 2009-01-19 2009-01-19 Compass ruler for blackboard

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CNU2009200102052U CN201342876Y (en) 2009-01-19 2009-01-19 Compass ruler for blackboard

Publications (1)

Publication Number Publication Date
CN201342876Y true CN201342876Y (en) 2009-11-11

Family

ID=41274460

Family Applications (1)

Application Number Title Priority Date Filing Date
CNU2009200102052U Expired - Fee Related CN201342876Y (en) 2009-01-19 2009-01-19 Compass ruler for blackboard

Country Status (1)

Country Link
CN (1) CN201342876Y (en)

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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: 20091111

Termination date: 20110119