CN207565205U - A kind of compasses for teaching - Google Patents
A kind of compasses for teaching Download PDFInfo
- Publication number
- CN207565205U CN207565205U CN201720929200.4U CN201720929200U CN207565205U CN 207565205 U CN207565205 U CN 207565205U CN 201720929200 U CN201720929200 U CN 201720929200U CN 207565205 U CN207565205 U CN 207565205U
- Authority
- CN
- China
- Prior art keywords
- gauge
- fixing sleeve
- chalk
- compasses
- gauge bar
- 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 is related to a kind of compasses for teaching, including two gauge bars, the upper end of two gauge bars passes through stud connection, the lower end of wherein one gauge bar is connected with chalk fixing sleeve, the lower end of another gauge bar is connect by rotating mechanism with magnet piece, sliding detent mechanism is provided in the middle part of two gauge bars, sliding detent mechanism can adjust the angle that two gauge bars open.The beneficial effects of the utility model are：Current blackboard is usually irony or stainless steel, and the lower end for the gauge bar for playing center of circle positioning action is connect by the utility model by rotating mechanism with magnet piece, and magnet piece is fixed with blackboard, very convenient when will not only damage blackboard, but also draw；Chalk fixing sleeve is set, chalk is clamped more firm and easily replaces chalk, it is easy to use；Setting sliding detent mechanism screws positioning bolt during use after by two gauge bars opening special angle, then the angle drawn between two gauge bar of bowlder is not spent, i.e., radius is constant, guarantees smoothly to draw circle.
Description
Technical field
The utility model is related to a kind of mathematical education ancillary equipments, and in particular to a kind of compasses for teaching.
Background technology
In the teaching in junior middle school, senior middle school and College Maths, particularly with regard in geometric teaching process, it is sometimes desirable to teach
Teacher is using compasses in blackboard upper drawing circle.Two gauge bars of compasses for teaching of the prior art are typically that a gauge bar lower end is fixed
Chalk, the lower end of another gauge bar be fabricated to the sharp end similar with conventional compasses or make can sucker shape, shortcoming
It is：If being made sharp end, on the one hand it is difficult to position on blackboard, on the other hand blackboard may be caused forever if positioning by force
Damage long；If being made sucker shape, deficiency is to fix loosely, and blackboard is usually hair side and has some powder capillarys ash, therefore comes round
Excessive gas pressure be adsorbed in it is more difficult fixed in blackboard plane, the center of circle fix loosely instead result in difficulty of drawing a picture；Another rule
The structure that chalk is fixed in bar lower end is also unreasonable, and chalk is fixed loosely；Only top is hinged between two gauge bars, pretends bowlder two
Angle between gauge bar easily changes, and round radius is caused to change, and eventually leading to circle cannot be closed, and draws circle failure.
Utility model content
The utility model provides a kind of compasses for teaching, it is intended to overcome fixed existing for compasses for teaching of the prior art
Loosely, the deficiencies of fragile blackboard.
The technical solution that the utility model solves above-mentioned technical problem is as follows：A kind of compasses for teaching, including two rule
Bar, the upper end of two gauge bars is by stud connection, wherein the lower end of a gauge bar is connected with chalk fixing sleeve, another institute
The lower end for stating gauge bar is connect by rotating mechanism with magnet piece, and sliding detent mechanism, institute are provided in the middle part of two gauge bars
The angle that two gauge bars open can be adjusted by stating sliding detent mechanism.
Based on the above technical solution, the utility model can also do following improvement.
Further, the chalk fixing sleeve cylindrical shape thin for the thick lower end in upper end, the upper end of the chalk fixing sleeve and phase
The lower end of the gauge bar answered is fixedly connected, and the lower end of the chalk fixing sleeve is equipped with the notch upwardly extended along barrel, described
The length of notch in the up-down direction is 10-15mm, and length of the notch in the circumferential direction of the chalk fixing sleeve is 2-
5mm is arranged with clamping ring set on the barrel of the chalk fixing sleeve.It can make chalk fixing sleeve lower compression when being pushed away on clamping collar
Contracting, because of presence jaggy, therefore compression rear lower is radially contracted, so as to clamp chalk；Replace chalk when, it is only necessary under push away institute
Gripping sleeve is stated, then chalk fixing sleeve lower part is sprung back, you can removes chalk.
Further, it is equipped with anti-slip rubber bed course in the barrel of the chalk fixing sleeve.Anti-slip rubber bed course can be tubular
And ripple is set on inner wall, so that it preferably clamps chalk, prevent chalk from coming off.
Further, the rotating mechanism includes pedestal, sphere and shaft, and the bottom wall of the pedestal is fixed with the magnet piece
Connection, the roof of the pedestal are equipped with the card slot being packed into for the sphere, and the sphere can be in the card slot along arbitrary side
To rotation, the lower end of the shaft is fixedly connected with the sphere, the lower end of the upper end of the shaft and the corresponding gauge bar
It is fixedly connected.
Further, the sliding detent mechanism includes sliding sheet, and one end of the sliding sheet is fixed with a gauge bar
Connection, the sliding sheet are equipped with using the center of the hinge shaft as the arc-shaped slot in the center of circle, and screw thread connects on another gauge bar
Be connected to positioning bolt, the positioning bolt pass through the arc-shaped slot and its sliding sheet can be pressed on to corresponding gauge bar when screwing
On.
Further, the chalk fixing sleeve is made of plastics.
Further, the magnet piece is flat round table-like.Magnet is in flat round table-like, i.e., bottom area is larger, therefore its
It is more firm to inhale the fixation on blackboard.
Compared with prior art, the beneficial effects of the utility model are：Current blackboard is usually irony or stainless steel,
The lower end for the gauge bar for playing center of circle positioning action is connect by the utility model by rotating mechanism with magnet piece, and magnet piece is inhaled with blackboard
It closes and fixes, it is very convenient when will not only damage blackboard, but also draw；Set chalk fixing sleeve, to chalk clamping it is more firm and
Chalk is easily replaced, it is easy to use；Setting sliding detent mechanism screws positioning spiral shell during use after by two gauge bars opening special angle
Bolt, the then angle drawn between two gauge bar of bowlder are not spent, i.e., radius is constant, guarantees smoothly to draw circle.
Description of the drawings
Fig. 1 is a kind of structure diagram of compasses for teaching provided by the utility model；
Fig. 2 is a kind of structure diagram of the chalk fixing sleeve of compasses for teaching provided by the utility model.
In attached drawing, parts list represented by the reference numerals are as follows：
1. gauge bar；2. hinge shaft；3. chalk fixing sleeve；4. rotating mechanism；5. magnet piece；6. slide detent mechanism；31. it lacks
Mouthful；32. clamp ring set；33. anti-slip rubber bed course；40. shaft；41. sphere；42. pedestal；61. sliding sheet；62. arc-shaped slot；
63. positioning bolt.
Specific embodiment
The principle and feature of the utility model are described below in conjunction with attached drawing, example is served only for explaining this practicality
It is novel, it is not intended to limit the scope of the utility model.
As shown in Figure 1, the utility model provides a kind of compasses for teaching, including two gauge bars 1, two gauge bars 1 it is upper
End is connected by hinge shaft 2, wherein the lower end of a gauge bar 1 is connected with chalk fixing sleeve 3, under another gauge bar 1
End is connect by rotating mechanism 4 with magnet piece 5, and the middle part of two gauge bars 1 is provided with sliding detent mechanism 6, the sliding
Detent mechanism 6 can adjust the angle that two gauge bars 1 open.
Further, the chalk fixing sleeve 3 is the thin cylindrical shape in the thick lower end in upper end, the upper end of the chalk fixing sleeve 3 with
The lower end of the corresponding gauge bar 1 is fixedly connected, and the lower end of the chalk fixing sleeve 3 is equipped with the notch upwardly extended along barrel
31, the length of the notch 31 in the up-down direction is 10-15mm, and the notch 31 is in the circumferential direction of the chalk fixing sleeve 3
Length for 2-5mm, be arranged on the barrel of the chalk fixing sleeve 3 and clamp ring set 32.
Further, it is equipped with anti-slip rubber bed course 33 in the barrel of the chalk fixing sleeve 3.
Further, the rotating mechanism 4 include pedestal 42, sphere 41 and shaft 40, the bottom wall of the pedestal 42 with it is described
Magnet piece 5 is fixedly connected, and the roof of the pedestal 42 is equipped with the card slot being packed into for the sphere 41, and the sphere 41 can be in institute
It states and is rotated in card slot along any direction, the lower end of the shaft 40 is fixedly connected with the sphere 41, the upper end of the shaft 40
It is fixedly connected with the lower end of the corresponding gauge bar 1.
Further, the sliding detent mechanism 6 includes sliding sheet 61, one end of the sliding sheet 61 and a gauge bar
1 is fixedly connected, and the sliding sheet 61 is equipped with using the center of the hinge shaft 2 as the arc-shaped slot 62 in the center of circle, another rule
It is threaded with positioning bolt 63 on bar 1, the positioning bolt 63 passes through the arc-shaped slot 62 and its compressible institute when screwing
State sliding sheet 61.
Further, the chalk fixing sleeve 3 is made of plastics.The magnet piece 5 is in flat round table-like.
The above is only the preferred embodiment of the present invention, is not intended to limit the utility model, all in this practicality
Within novel spirit and principle, any modification, equivalent replacement, improvement and so on should be included in the guarantor of the utility model
Within the scope of shield.
Claims (7)
1. a kind of compasses for teaching, which is characterized in that including two gauge bars (1), the upper end of two gauge bars (1) passes through hinge shaft (2)
Connection, wherein the lower end of a gauge bar (1) is connected with chalk fixing sleeve (3), the lower end of another gauge bar (1) passes through
Rotating mechanism (4) is connect with magnet piece (5), and sliding detent mechanism (6), the cunning are provided in the middle part of two gauge bars (1)
The angle that two gauge bars (1) are opened can be adjusted by moving detent mechanism (6).
2. a kind of compasses for teaching according to claim 1, which is characterized in that the chalk fixing sleeve (3) is thick for upper end
The thin cylindrical shape in lower end, the upper end of the chalk fixing sleeve (3) is fixedly connected with the lower end of the corresponding gauge bar (1), described
The lower end of chalk fixing sleeve (3) is equipped with the notch (31) upwardly extended along barrel, the length of the notch (31) in the up-down direction
It spends for 10-15mm, width of the notch (31) in the circumferential direction of the chalk fixing sleeve (3) is 2-5mm, and the chalk is fixed
It covers to be arranged on the barrel of (3) and clamps ring set (32).
3. a kind of compasses for teaching according to claim 2, which is characterized in that in the barrel of the chalk fixing sleeve (3)
Equipped with anti-slip rubber bed course (33).
4. a kind of compasses for teaching according to claim 1, which is characterized in that the rotating mechanism (4) is including pedestal
(42), sphere (41) and shaft (40), the bottom wall of the pedestal (42) are fixedly connected with the magnet piece (5), the pedestal
(42) roof is equipped with the card slot being packed into for the sphere (41), and the sphere (41) can be in the card slot along any direction
Rotation, the lower end of the shaft (40) is fixedly connected with the sphere (41), the upper end of the shaft (40) with it is corresponding described in
The lower end of gauge bar (1) is fixedly connected.
5. a kind of compasses for teaching according to claim 1, which is characterized in that the sliding detent mechanism (6) is including cunning
Move piece (61), one end of the sliding sheet (61) is fixedly connected with a gauge bar (1), the sliding sheet (61) equipped with
The center of the hinge shaft (2) is the arc-shaped slot (62) in the center of circle, and positioning bolt is threaded on another gauge bar (1)
(63), the positioning bolt (63) across the arc-shaped slot (62) and its screw when the sliding sheet (61) can be pressed on pair
On the gauge bar (1) answered.
A kind of 6. compasses for teaching according to any one of claims 1 to 5, which is characterized in that the chalk fixing sleeve (3)
It is made of plastics.
7. a kind of compasses for teaching according to any one of claims 1 to 5, which is characterized in that the magnet piece (5) is flat
Flat is round table-like.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720929200.4U CN207565205U (en) | 2017-07-27 | 2017-07-27 | A kind of compasses for teaching |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720929200.4U CN207565205U (en) | 2017-07-27 | 2017-07-27 | A kind of compasses for teaching |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207565205U true CN207565205U (en) | 2018-07-03 |
Family
ID=62696936
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720929200.4U Expired - Fee Related CN207565205U (en) | 2017-07-27 | 2017-07-27 | A kind of compasses for teaching |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207565205U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109017054A (en) * | 2018-07-30 | 2018-12-18 | 广州粤动英投文化影视有限公司 | A kind of cartoon design rotation ruler |
-
2017
- 2017-07-27 CN CN201720929200.4U patent/CN207565205U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109017054A (en) * | 2018-07-30 | 2018-12-18 | 广州粤动英投文化影视有限公司 | A kind of cartoon design rotation ruler |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180703 Termination date: 20190727 |