CN209534571U - A kind of mathematical teaching aid - Google Patents
A kind of mathematical teaching aid Download PDFInfo
- Publication number
- CN209534571U CN209534571U CN201821748428.4U CN201821748428U CN209534571U CN 209534571 U CN209534571 U CN 209534571U CN 201821748428 U CN201821748428 U CN 201821748428U CN 209534571 U CN209534571 U CN 209534571U
- Authority
- CN
- China
- Prior art keywords
- strut
- brace
- connecting rod
- hinged
- teaching aid
- 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
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Abstract
The utility model relates to a kind of mathematical teaching aid, including the first strut and the second strut, the end of first strut and the second strut is hinged；The first strut tail end is provided with axis, and the axis and the first strut are rotatablely connected, and shaft end portion is provided with sucker；First strut opens up fluted with the second strut outer end face；The both ends of first strut groove have been respectively articulated with the first brace and second connecting rod；Second connecting rod end is hinged with first connecting rod, and the both ends of the second strut groove have been respectively articulated with fourth link and the second brace；Fourth link one end is hinged with third connecting rod, and third connecting rod and the second brace are hinged；Third strut is sheathed with inside second strut；Third strut is internally provided with the cavity of bottom opening, and the cavity bottom is provided with stepped chalk locking cap, and the third strut is threadedly coupled with chalk locking cap.It is the utility model is designed reasonably, easy to carry and be convenient for changing compasses chalk.
Description
Technical field
The utility model relates to teaching aid technical fields, more particularly to a kind of mathematical teaching aid.
Background technique
In teaching process, a large amount of teaching aid aided educations are commonly used in teacher, and student is facilitated to understand knowledge point, more intuitive
Make student memory knowledge point；Especially during mathematical education, make commonly using teaching aids such as set square, protractor, compasses
Figure, a class teacher needs to carry many teaching aid mapping aided educations sometimes, but existing teaching aid is mostly single independent, compares
Dispersion, teacher is inconvenient to carry, while while mapping replaces teaching aid waste instructional blocks of time back and forth, increases the workload of teacher,
When using compasses construction, the chalk of compasses bottom easily fractures, while needing to constantly change the chalk of compasses bottom, influences to impart knowledge to students
Quality.
Utility model content
The purpose of the utility model is to overcome the deficiencies in the prior art, and it is integrated to provide the easy to carry of one kind, teaching aid
With the mathematical teaching aid for being convenient for changing compasses chalk.
To achieve the goals above, the technical solution of the utility model is:
A kind of mathematical teaching aid, including the first strut and the second strut, the end of first strut and the second strut
Portion hingedly constitutes compasses；The first strut tail end is provided with axis, and the axis and the first strut are rotatablely connected, and shaft end portion is provided with
Sucker；First strut opens up fluted with the second strut outer end face；
The both ends of first strut groove have been respectively articulated with the first brace and second connecting rod；Second connecting rod end is hinged with first
Connecting rod, the first connecting rod and the first brace are hinged；First brace, second connecting rod, first connecting rod and the first strut are connected with each other
Constitute the first right angle triangle；
The both ends of second strut groove have been respectively articulated with fourth link and the second brace；Fourth link one end is hinged with third
Connecting rod, third connecting rod and the second brace are hinged；Second brace, third connecting rod, fourth link and the second strut are interconnected to constitute
Second right angle triangle；Third strut is sheathed with inside second strut；Third strut is internally provided with the cavity of bottom opening, institute
It states cavity bottom and is provided with stepped chalk locking cap, third strut is threadedly coupled with chalk locking cap.
Further, the bottom of the first strut groove is hinged with the first fixed link, and first brace and first are consolidated
Fixed pole is slidably connected；The bottom of second strut groove is hinged with the second fixed link, and second fixed link and the second brace slide
Connection.
Further, second strut upper surface offers rectangular opening, and shifting block is provided in rectangular opening, and the shifting block is worn
Rectangular opening is crossed to fix with third strut ends.
Further, push rod is provided in the cavity of the third strut, push rod outer wall is sheathed with spring, and push rod side is set
It is equipped with chalk holder, chalk holder interior diameter is greater than the diameter of push rod；Third strut upper surface offers card slot, is provided with card in card slot
Block, fixture block pass through card slot and are fixed on push rod end.
Further, first strut and the second strut hinged place are rotatably connected to protractor.
Further, first brace and the first strut are in angle, and the angle is α, and the range of α is 0 °~30 °；The
Two braces and fourth link are in angle, and the angle is β, and the range of β is 0 °~45 °.
Further, the surface of first strut, the second strut, third strut, the first brace and the second brace is all provided with
It is equipped with scale.
Further, outer cover is hinged on the outer wall of the third strut internal cavity, the length of outer cover is greater than chalk holder
Length.
Further, the chalk locking cap is internally provided with the protective case being stepped, and protective case is rubber material system
At tube body.
The utility model has the following beneficial effects:
A kind of mathematical teaching aid passes through the combination of the components such as the first strut, the second strut, protractor and first connecting rod
30 ° of angle right angled triangle teaching aids, isosceles right triangle teaching aid, protractor and compasses can be combined and are convenient for carrying, kept away simultaneously
Exempt to replace teaching aid back and forth in teaching drawing course, saves instructional blocks of time；By the movement for stirring drive third strut of shifting block, increase
The length for adding the second strut facilitates and draws long line pattern；First strut, the first brace, first connecting rod and second connecting rod difference
Hingedly, the first brace, first connecting rod and second connecting rod is facilitated to be contracted in the groove of the first strut；Second strut, the second brace,
Third connecting rod and fourth link are respectively articulated with, and the second brace, third connecting rod and fourth link is facilitated to be contracted to the recessed of the second strut
In slot；Protractor can rotate to either direction, be convenient for measuring angle；Pass through making for push rod, spring, chalk holder and chalk locking cap
With the replacement for facilitating chalk；The length of chalk is used by the adjusting easy to use of fixture block, card slot；It is provided in chalk locking cap
The protective case being stepped made of rubber material prevents chalk from fractureing while facilitating fixed chalk.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of mathematical teaching aid of the utility model.
Fig. 2 is a kind of expansion shape structural schematic diagram of mathematical teaching aid of the utility model.
Fig. 3 be in a kind of Fig. 2 of mathematical teaching aid of the utility model A to cross-sectional view.
Fig. 4 is the enlarged structure schematic diagram in a kind of Fig. 3 of mathematical teaching aid of the utility model at B.
Numbering in the drawing are as follows: 1 is protractor, and 2 be the first strut, and 3 be the second strut, and 4 be third strut, and 5 be axis, and 6 are
Sucker, 7 be chalk locking cap, and 8 be rectangular opening, and 9 be shifting block, and 10 be the first brace, and 11 be first connecting rod, and 12 be second connecting rod,
13 be the second brace, and 14 be third connecting rod, and 15 be fourth link, and 16 be protective case, and 17 be fixture block, and 18 be card slot, and 19 be first
Fixed link, 20 be the second fixed link, and 21 be push rod, and 22 be spring, and 23 be chalk holder.
Specific embodiment
The present invention will be further described below with reference to the accompanying drawings and specific embodiments:
As shown in Figure 1 to 4, a kind of mathematical teaching aid, including the first strut 2 and the second strut 3, described first
The end of bar 2 and the second strut 3 hingedly constitutes compasses；First strut, 2 tail end is provided with axis 5, the axis 5 and the first strut
2 rotation connections, 5 end of axis is provided with sucker 6；First strut 2 opens up fluted with 3 outer end face of the second strut；
The both ends of first strut, 2 groove have been respectively articulated with the first brace 10 and second connecting rod 12；12 end of second connecting rod hinge
It is connected to first connecting rod 11, the first connecting rod 11 and the first brace 10 are hinged；First brace 10, second connecting rod 12, first connecting rod
11 and first strut 2 be interconnected to constitute the first right angle triangle；
The both ends of second strut, 3 groove have been respectively articulated with fourth link 15 and the second brace 13；15 one end of fourth link hinge
It is connected to third connecting rod 14, third connecting rod 14 and the second brace 13 are hinged；Second brace 13, third connecting rod 14, fourth link 15 with
Second strut 3 is interconnected to constitute the second right angle triangle；Third strut 4 is sheathed with inside second strut 3；In third strut 4
Portion is provided with the cavity of bottom opening, and the cavity bottom is provided with stepped chalk locking cap 7.
The bottom of first strut, 2 groove is hinged with the first fixed link 19, first brace 10 and the first fixed link
19 are slidably connected；The bottom of second strut, 3 groove is hinged with the second fixed link 20, second fixed link 20 and the second brace 13
It is slidably connected.Second strut, 3 upper surface offers rectangular opening 8, and shifting block 9 is provided in rectangular opening 8, and the shifting block 9 passes through
Rectangular opening 8 is fixed with 4 end of third strut.Push rod 21 is provided in the cavity of the third strut 4,21 outer wall of push rod is sheathed with
Spring 22,21 side of push rod are provided with chalk holder 23, and 23 interior diameter of chalk holder is greater than the diameter of push rod 21；4 upper end of third strut
Face offers card slot 18, and fixture block 17 is provided in card slot 18, and fixture block 17 passes through card slot 18 and is fixed on 21 end of push rod.
First strut 2 and 3 hinged place of the second strut are rotatably connected to protractor 1.First brace 10 and first
Strut 2 is in angle, and the angle is α, and the range of α is 0 °~30 °；Second brace 13 is in angle, the folder with fourth link 15
Angle is β, and the range of β is 0 °~45 °.First strut 2, the second strut 3, third strut 4, the first brace 10 and the second brace
13 surface is provided with scale.It is hinged with outer cover 24 on the outer wall of 4 internal cavity of third strut, the length of outer cover 24 is greater than
The length of chalk holder 23.The third strut 4 is threadedly coupled with chalk locking cap 7, and chalk locking cap 7 is internally provided in ladder
The protective case 16 of shape, protective case 16 are tube body made of rubber material.
First strut 2 and 3 upper surface of the second strut are provided with scale, can be drawn by the first strut 2 and the second strut 3
Line pattern, when needing to draw longer line pattern, stirring shifting block 9 keeps the drafting of 4 conveniently moving of third strut longer straight
Line graph.
When needing to map using the first right angle triangle, the first right angle triangle is 30 ° of angle right angle triangles, the first brace
10 ends are provided with 60 ° of angles, and mobile first brace 10 makes 30 ° of the angle α, the first strut 2, the first brace 10,11 and of first connecting rod
The right angled triangle that second connecting rod 12 is constituted, the first fixed link 19 support the first strut 2 and the first brace 10, and hand helps first
Fixed link 19 is drawn；When without using when, the first brace 10 is mobile to drive first connecting rod 11 and second connecting rod 12 to rotate, and first tiltedly
Bar 10, first connecting rod 11 and second connecting rod 12 are moved in the groove of the first strut 2.
When needing using the second right angle triangle, the second right angle triangle is equilateral right angle triangle, 13 end of the second brace
Portion is provided with 45° angle, and mobile second brace 13 makes 45 ° of the angle β, the second strut 3, the second brace 13, third connecting rod 14 and the 4th
Connecting rod 15 constitutes equilateral right angled triangle, and the second fixed link 20 supports the second strut 2 and the second brace 13, and hand helps second to consolidate
Fixed pole 20 is drawn；When without using when, the second brace 13 is mobile to drive third connecting rod 14 and fourth link 15 to rotate, the second brace
13, third connecting rod 14 and fourth link 15 are moved in the groove of the second strut 3.
Protractor 1 is set to 3 hinged place of the first strut 2 and the second strut, and protractor 1 can rotate to either direction, convenient
Measurement angle.
When needing using compasses graphing, on the fixed blackboard of the sucker 6 of 2 bottom of the first strut, the second strut 3 of rotation is drawn
Shape of charting opens the outer cover 24 for being articulated with 3 inner face of the second strut when needing replacing chalk, chalk holder 23 is taken out, in chalk
Chalk is placed in pipe 23, chalk holder 23 is placed in the cavity of the second strut 3, drives push rod 21 to move by mobile fixture block 17
Dynamic, push rod 21 pushes the chalk in chalk holder 23 to pass through outside protective case 16 and chalk locking cap 7 to chalk locking cap 7, passes through
Fixture block 17 and push rod 21 facilitate the length for adjusting and using chalk, and protective case 16 is the tube body being stepped made of rubber material,
Prevent chalk from fractureing while facilitating fixed chalk.
The embodiment of the above, the only preferred embodiment of the utility model not limit the utility model
Practical range, therefore all equivalent change or modifications done according to structure, feature and principle described in the utility model patent range,
It should be included in present utility model application the scope of the patents.
Claims (7)
1. a kind of mathematical teaching aid, which is characterized in that including the first strut (2) and the second strut (3), first strut
(2) compasses are hingedly constituted with the end of the second strut (3)；First strut (2) tail end is provided with axis (5), the axis (5) with
First strut (2) rotation connection, axis (5) end is provided with sucker (6)；First strut (2) is opened with the second strut (3) outer end face
Equipped with groove；
The both ends of the first strut (2) groove have been respectively articulated with the first brace (10) and second connecting rod (12)；Second connecting rod (12) end
Portion is hinged with first connecting rod (11), and the first connecting rod (11) and the first brace (10) are hinged；First brace (10), second connecting rod
(12), first connecting rod (11) and the first strut (2) are interconnected to constitute the first right angle triangle；
The both ends of the second strut (3) groove have been respectively articulated with fourth link (15) and the second brace (13)；Fourth link (15) one
End is hinged with third connecting rod (14), and third connecting rod (14) and the second brace (13) are hinged；Second brace (13), third connecting rod
(14), fourth link (15) and the second strut (3) are interconnected to constitute the second right angle triangle；
Second strut (3) upper surface offers rectangular opening (8), is provided with shifting block (9) in rectangular opening (8), the shifting block (9)
It is fixed across rectangular opening (8) and third strut (4) end；
Third strut (4) are sheathed with inside second strut (3)；Third strut (4) is internally provided with the cavity of bottom opening, described
It is provided in the cavity of third strut (4) push rod (21), push rod (21) outer wall is sheathed with spring (22), the setting of push rod (21) side
Have chalk holder (23), chalk holder (23) interior diameter is greater than the diameter of push rod (21)；Third strut (4) upper surface offers card slot
(18), it is provided with fixture block (17) in card slot (18), fixture block (17) passes through card slot (18) and is fixed on push rod (21) end；
The cavity bottom is provided with stepped chalk locking cap (7), third strut (4) and chalk locking cap (7) screw thread
Connection.
2. a kind of mathematical teaching aid according to claim 1, which is characterized in that the bottom of the first strut (2) groove
Portion is hinged with the first fixed link (19), and first brace (10) is slidably connected with the first fixed link (19)；Second strut (3) is recessed
The bottom of slot is hinged with the second fixed link (20), and second fixed link (20) is slidably connected with the second brace (13).
3. a kind of mathematical teaching aid according to claim 1, which is characterized in that first strut (2) and second
Bar (3) hinged place is rotatably connected to protractor (1).
4. a kind of mathematical teaching aid according to claim 1, which is characterized in that first brace (10) and first
Bar (2) is in angle, and the angle is α, and the range of α is 0 °~30 °；Second brace (13) and fourth link (15) are in angle, institute
Stating angle is β, and the range of β is 0 °~45 °.
5. a kind of mathematical teaching aid according to claim 1, which is characterized in that first strut (2), the second strut
(3), the surface of third strut (4), the first brace (10) and the second brace (13) is provided with scale.
6. a kind of mathematical teaching aid according to claim 1, which is characterized in that third strut (4) internal cavity
It is hinged on outer wall outer cover (24), the length of outer cover (24) is greater than the length of chalk holder (23).
7. a kind of mathematical teaching aid according to claim 1, which is characterized in that set inside the chalk locking cap (7)
It is equipped with the protective case (16) being stepped, protective case (16) is tube body made of rubber material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821748428.4U CN209534571U (en) | 2018-10-26 | 2018-10-26 | A kind of mathematical teaching aid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821748428.4U CN209534571U (en) | 2018-10-26 | 2018-10-26 | A kind of mathematical teaching aid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209534571U true CN209534571U (en) | 2019-10-25 |
Family
ID=68247517
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821748428.4U Expired - Fee Related CN209534571U (en) | 2018-10-26 | 2018-10-26 | A kind of mathematical teaching aid |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209534571U (en) |
-
2018
- 2018-10-26 CN CN201821748428.4U patent/CN209534571U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20191025 Termination date: 20201026 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |