CN206231115U - A kind of mathematics teaching in junior middle school drawing compass - Google Patents
A kind of mathematics teaching in junior middle school drawing compass Download PDFInfo
- Publication number
- CN206231115U CN206231115U CN201621071373.9U CN201621071373U CN206231115U CN 206231115 U CN206231115 U CN 206231115U CN 201621071373 U CN201621071373 U CN 201621071373U CN 206231115 U CN206231115 U CN 206231115U
- Authority
- CN
- China
- Prior art keywords
- teeth groove
- gear
- beam barrel
- movable supporting
- fixedly connected
- 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 discloses a kind of mathematics teaching in junior middle school drawing compass, including fixed block, the side of the fixed block is fixedly connected with sucker, the side middle part of the fixed block is provided with circular groove, the inside clamping of the circular groove rotates disk, the side middle part for rotating disk is fixedly connected fixing leg, the right-hand member axle connection movable supporting leg of the fixing leg, the upper shaft connection first gear of the movable supporting leg, the right-hand member axle connection beam barrel of the fixing leg, the outer middle side part of the beam barrel is fixedly connected second gear, the second gear engages first gear, the side surface circumference of the beam barrel is provided with the first teeth groove.The mathematics teaching in junior middle school drawing compass can protect blackboard; reduce frictional resistance when rotating; and also the distance between movable supporting leg and fixing leg can be fixed; preventing from being shifted in picture bowlder movable supporting leg causes the circle for drawing irregular; simple structure; it is easy to use, improve the quality of teaching.
Description
Technical field
The utility model is related to teaching aid technical field, specially a kind of mathematics teaching in junior middle school drawing compass.
Background technology
Compasses are the instruments for drawing circle or string in mathematics and drawing, are usually used in construction with ruler and compasses.Being made for compasses is logical
It is often metal, including two parts connection is by a hinge, wherein can adjust.It is characterized in that：The one side of handwriting is pasted and is connected to
The one side of hinged joint, the another side of hinged joint is pasted and is connected in the middle of one end of lattice chi, and the crack upper end both sides insertion of handwriting is connected to
The two ends of rotating shaft, the axis body of rotating shaft wears the upper end for being connected to compasses supporting leg.At present, the compasses for being used class hour in junior middle school teachers
Typically use compasses point and be fixed on blackboard surface, but damage is so not only easily caused to blackboard surface, and frictional force
The larger circle for drawing is irregular, and the efficiency for drawing circle is low, is not suitable for upper teaching.
The content of the invention
The purpose of this utility model is to provide a kind of mathematics teaching in junior middle school drawing compass, to solve above-mentioned background technology
The problem of middle proposition.
To achieve the above object, the utility model provides following technical scheme：A kind of mathematics teaching in junior middle school drawing compass,
Including fixed block, the side of the fixed block is fixedly connected with sucker, and the side middle part of the fixed block is provided with circular groove, institute
The inside clamping for stating circular groove rotates disk, and the side middle part of the rotation disk is fixedly connected fixing leg, the fixation
The right-hand member axle connection movable supporting leg of leg, the left end of the movable supporting leg is provided with pen container, and the surface of the pen container is connected by screw thread
Connecting bolt, the upper shaft connection first gear of the movable supporting leg, the front right-hand member of the fixing leg is provided with the 3rd teeth groove, institute
The right-hand member axle connection beam barrel of fixing leg is stated, the outer middle side part of the beam barrel is fixedly connected second gear, and the second gear is nibbled
First gear is closed, one end circumference of the beam barrel is provided with the first teeth groove, and the internal slide of the beam barrel is socketed with fixed mechanism.
Preferably, the side surface circumference for rotating disk is provided with ball.
Preferably, the fixed mechanism includes nut, threaded rod and fixed disc, and one end of threaded rod is fixedly connected fixation
Disk, the other end of threaded rod is connected through a screw thread nut, and the side of fixed disc is provided with the second teeth groove, first teeth groove and
3rd teeth groove engages the second teeth groove.
Preferably, the beam barrel is located at the middle part of the 3rd teeth groove.
Compared with prior art, the beneficial effects of the utility model are：Mathematics teaching in junior middle school drawing compass is by inhaling
Compasses are fixed on disk the surface of blackboard, and blackboard surface will not be caused damage；Can be dropped by the ball for rotating disc surfaces
Frictional resistance during low rotation, reduces the use difficulty of compasses, improves the efficiency of picture circle；Picture circle is adjusted by swinging movable supporting leg
Radius, after the completion of regulation, then adjusting nut makes the second teeth groove engage the first teeth groove and the 3rd teeth groove to fix movable supporting leg
The distance between with fixing leg, prevent from causing the circle for drawing irregular drawing bowlder movable supporting leg and shift, simple structure,
It is easy to use, improve the quality of teaching.
Brief description of the drawings
Fig. 1 is overall structure front view of the present utility model；
Fig. 2 is overall structure top view of the present utility model；
Fig. 3 is the enlarged drawing at a in Fig. 1 of the present utility model.
In figure：1 fixed block, 2 suckers, 3 circular grooves, 4 rotate disk, 5 fixing legs, 6 movable supporting legs, 7 pen containers, 8 spiral shells
Circle is fixed in bolt, 9 first gears, 10 beam barrels, 11 second gears, 12 first teeth groove, 13 fixed mechanisms, 14 nuts, 15 threaded rods, 16
Disk, 17 second teeth groove, 18 the 3rd teeth groove.
Specific embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is carried out
Clearly and completely describe, it is clear that described embodiment is only a part of embodiment of the utility model, rather than whole
Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not under the premise of creative work is made
The every other embodiment for being obtained, belongs to the scope of the utility model protection.
Fig. 1-3 are referred to, the utility model provides a kind of technical scheme：A kind of mathematics teaching in junior middle school drawing compass, bag
Fixed block 1 is included, the side of fixed block 1 is fixedly connected with sucker 2, compasses are fixed on the surface of blackboard by sucker 2, prevents black
Plate suffers damage, and the side middle part of fixed block 1 is provided with circular groove 3, and the inside clamping of circular groove 3 rotates disk 4, slewing circle
The side surface circumference of disk 4 is provided with ball, and ball can reduce the frictional resistance being subject to when compasses are rotated, rotate the side of disk 4
Middle part is fixedly connected fixing leg 5, and the right-hand member axle connection movable supporting leg 6 of fixing leg 5, the left end of movable supporting leg 6 is provided with pen container
7, the surface of pen container 7 is connected through a screw thread bolt 8, and pen container 7 is loosened by regulating bolt 8, passes through to twist again after being then placed in chalk
Tight bolt 8 clamps chalk, prevents chalk when in use from coming off, the upper shaft connection first gear 9 of movable supporting leg 6, fixing leg 5
Front right-hand member be provided with the 3rd teeth groove 18, the right-hand member axle connection beam barrel 10 of fixing leg 5, beam barrel 10 is located in the 3rd teeth groove 18
Portion, the outer middle side part of beam barrel 10 is fixedly connected second gear 11, the engagement first gear 9 of second gear 11, one end circle of beam barrel 10
It is provided with the first teeth groove 12 week, the internal slide of beam barrel 10 is socketed with fixed mechanism 13, and fixed mechanism 13 includes nut 14, screw thread
Bar 15 and fixed disc 16, one end of threaded rod 15 are fixedly connected fixed disc 16, and the other end of threaded rod 15 is connected by screw thread
Connected nut 14, the side of fixed disc 16 is provided with the second teeth groove 17, and the first teeth groove 12 and the 3rd teeth groove 18 engage the second teeth groove
17。
The utility model is in the specific implementation：Compasses are fixed on the surface of blackboard by sucker 2, adjusting nut 14 makes
Two teeth groove 17 departs from the first teeth groove 12, swings the size that movable supporting leg 6 adjusts radius, and nut 14 makes the second tooth again after the completion of regulation
Groove 17 engages the first teeth groove 12 and the 3rd teeth groove 18 fixes the distance between movable supporting leg 6 and fixing leg 5, prevents from drawing bowlder
Movable supporting leg 6 shifts, and when rotating compasses, by rotating disk 4 and ball reduction frictional resistance, improves the efficiency of picture circle.
While there has been shown and described that embodiment of the present utility model, for the ordinary skill in the art,
It is appreciated that these embodiments can be carried out various changes in the case where principle of the present utility model and spirit is not departed from, repaiies
Change, replace and modification, scope of the present utility model is defined by the appended claims and the equivalents thereof.
Claims (4)
1. a kind of mathematics teaching in junior middle school drawing compass, including fixed block（1）, it is characterised in that：The fixed block（1）Side
It is fixedly connected with sucker（2）, the fixed block（1）Side middle part be provided with circular groove（3）, the circular groove（3）It is interior
Portion's clamping rotates disk（4）, the rotation disk（4）Side middle part be fixedly connected fixing leg（5）, the fixing leg
（5）Right-hand member axle connection movable supporting leg（6）, the movable supporting leg（6）Left end be provided with pen container（7）, the pen container（7）Surface
It is connected through a screw thread bolt（8）, the movable supporting leg（6）Upper shaft connection first gear（9）, the fixing leg（5）'s
Front right-hand member is provided with the 3rd teeth groove（18）, the fixing leg（5）Right-hand member axle connection beam barrel（10）, the beam barrel（10）It is outer
Middle side part is fixedly connected second gear（11）, the second gear（11）Engagement first gear（9）, the beam barrel（10）One end
Circumference is provided with the first teeth groove（12）, the beam barrel（10）Internal slide be socketed with fixed mechanism（13）.
2. a kind of mathematics teaching in junior middle school drawing compass according to claim 1, it is characterised in that：The rotation disk
（4）Side surface circumference be provided with ball.
3. a kind of mathematics teaching in junior middle school drawing compass according to claim 1, it is characterised in that：The fixed mechanism
（13）Including nut（14）, threaded rod（15）And fixed disc（16）, threaded rod（15）One end be fixedly connected fixed disc
（16）, threaded rod（15）The other end be connected through a screw thread nut（14）, fixed disc（16）Side be provided with the second teeth groove
（17）, first teeth groove（12）With the 3rd teeth groove（18）Engage the second teeth groove（17）.
4. a kind of mathematics teaching in junior middle school drawing compass according to claim 1, it is characterised in that：The beam barrel（10）Position
In the 3rd teeth groove（18）Middle part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621071373.9U CN206231115U (en) | 2016-09-22 | 2016-09-22 | A kind of mathematics teaching in junior middle school drawing compass |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621071373.9U CN206231115U (en) | 2016-09-22 | 2016-09-22 | A kind of mathematics teaching in junior middle school drawing compass |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206231115U true CN206231115U (en) | 2017-06-09 |
Family
ID=58983754
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621071373.9U Expired - Fee Related CN206231115U (en) | 2016-09-22 | 2016-09-22 | A kind of mathematics teaching in junior middle school drawing compass |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206231115U (en) |
-
2016
- 2016-09-22 CN CN201621071373.9U patent/CN206231115U/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: 20170609 Termination date: 20170922 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |