CN203739490U - Multifunctional compasses - Google Patents
Multifunctional compasses Download PDFInfo
- Publication number
- CN203739490U CN203739490U CN201320863436.4U CN201320863436U CN203739490U CN 203739490 U CN203739490 U CN 203739490U CN 201320863436 U CN201320863436 U CN 201320863436U CN 203739490 U CN203739490 U CN 203739490U
- Authority
- CN
- China
- Prior art keywords
- chi
- groove
- compass
- spacing draw
- shelf
- 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 pair of multifunctional compasses. The pair of multifunctional compasses comprises a protractor and a compasses frame. The protractor is fixed to the upper portion of the compasses frame. A left arm of the compasses frame is provided with a long ruler and a short ruler, wherein the length of the long ruler is L2, the length of the short ruler is L3, the lower end of the long ruler and the lower end of the short ruler are hinged to the lower portion of the left arm of the compasses frame, and the distance between the hinge point and the upper end of the left arm is L1. A first limiting clamping groove and a second limiting clamping groove are formed in the inner side of the right arm of the compasses frame. The distance between the first limiting clamping groove and the upper end of the right arm of the compasses frame is L1, and the distance between the second limiting clamping groove and the upper end of the right arm of the compasses frame is L4, wherein L1<2>+L3<2>=L4<2>, L3=1/2L4 and L2= L1. The outer end of the long ruler extends into the second limiting clamping groove or the outer end of the short ruler extends into the first limiting clamping groove. By the adoption of the pair of multifunctional compasses, the functions of a protractor, a pair of compasses and a set square are integrated, the structure is simple, operation is convenient, and management is easy.
Description
Technical field
The utility model belongs to study article technical field, specifically, relates to a kind of multifunctional compass.
Background technology
At present, teacher is in teaching process, usually can use set square, compasses and protractor, particularly math teacher, and these teaching equipments need unified management, not so easily lose, sometimes need to be used in conjunction with set square, compasses and protractor and just can draw the thing of wanting, and lose arbitrary the teaching that all can affect teacher; Use student ruler, compasses and protractor etc. time also there will be same situation, therefore, no matter be teacher or student, all need in a kind of energy and the apparatus of compasses, protractor and set square, to use and manage.
Utility model content
For solving above technical problem, the purpose of this utility model is to provide a kind of multifunctional compass that integrates compasses, protractor and set square.
The utility model object is achieved in that a kind of multifunctional compass, and its key is: comprise protractor and compass shelf, described protractor is fixed on the top of described compass shelf; The left arm of described compass shelf is provided with long chi and short chi, and the length of described long chi and short chi is respectively L2 and L3, the left arm lower hinge of the lower end of this long chi and short chi and described compass shelf, and the distance of this pin joint and described left arm upper end is L1; The right wall inner side of described compass shelf is provided with the first spacing draw-in groove and the second spacing draw-in groove, and the distance of described the first spacing draw-in groove and described compass shelf right arm upper end equals described L1, and the distance of described the second spacing draw-in groove and described compass shelf You Bi upper end is L4; Described L1, L2, L3 and L4 meet length requirement: L1
2+ L3
2=L4
2;
the outer end of described long chi is stretched in described the second spacing draw-in groove, or the outer end of described short chi is stretched in described the first spacing draw-in groove.
Adopt said structure, the outer end of long chi is stretched in described the second spacing draw-in groove, due to
the left arm and the right wall composition isosceles right triangle that make long chi and compass shelf, wherein Minimum Internal Angle is 45 degree, in the first spacing draw-in groove is stretched in the outer end of short chi time, due to L1
2+ L3
2=L4
2,
the left arm and the right wall composition right angled triangle that make short chi and compass shelf, wherein Minimum Internal Angle is 30 degree, and the protractor on compass shelf top can measure angle, compass shelf can be drawn circle.
Above-mentioned long chi comprises main scale and secondary chi, and one end of described main scale and the left arm of described compass shelf are hinged, and the other end and described secondary chi are hinged, and the free end of this pair chi stretches in described the second spacing draw-in groove.
Adopt said structure, long chi can shorten from middle part folding, is convenient to the placement of apparatus.
The right outside side of above-mentioned main scale hinge segment is provided with catch, and after main scale and secondary chi trail, described catch blocks described secondary chi, and described main scale and secondary chi are arranged on same straight line, and the free end of this pair chi stretches in described the second spacing draw-in groove.
Adopt said structure, the arranging of catch ensured the stability after long chi extends.
The left arm inner side of above-mentioned compass shelf is provided with stopper slot, and the lower end of described main scale and short chi and the lower end of described stopper slot are hinged, and after described secondary chi is regained and closed up with described main scale, described long chi and short chi can be taken in described stopper slot.
Adopt said structure, after long chi folding, long chi and short chi are taken in stopper slot in the lump, are convenient to the placement of compasses.
The angle of the right wall of above-mentioned the first spacing draw-in groove and the second spacing draw-in groove and described compass shelf is respectively 45 ° and 60 °, and this angle is all towards described compass shelf bottom.
Adopt said structure, the angle of the first spacing draw-in groove and the second spacing draw-in groove, forming right angled triangle, is convenient to stretching into of long chi and short chi outer end.
Beneficial effect: a kind of multifunctional compass of the utility model, the effect of protractor, compasses and set square is integrated in one, simple in structure, easy to operate, management is easily.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model;
Fig. 2 is that the structural representation after the first spacing draw-in groove is stretched in the outer end of the short-and-medium chi of Fig. 1;
Fig. 3 is that the structural representation after the second spacing draw-in groove is stretched in the outer end of long chi in Fig. 1.
Detailed description of the invention
Below in conjunction with embodiment and accompanying drawing, the utility model is described in further detail.
As shown in Figure 1: a kind of multifunctional compass, by comprising that protractor 1 and compass shelf 2 form, described protractor 1 is fixed on the top of described compass shelf 2; The left arm of described compass shelf 2 is provided with long chi 3 and short chi 4, and the length of described long chi 3 and short chi 4 is respectively L2 and L3, this long chi 3 and the lower end of short chi 4 and the left arm lower hinge of described compass shelf 2, and the distance of this pin joint and described left arm upper end is L1; The right wall inner side of described compass shelf 2 is provided with the first spacing draw-in groove 5 and the second spacing draw-in groove 6, and described the first spacing draw-in groove 5 and the second spacing draw-in groove 6 are respectively 45 ° and 60 ° with the angle of the right wall of described compass shelf 2, and this angle is all towards described compass shelf 2 bottoms; Described the first spacing draw-in groove 5 equals described L1 with the distance of described compass shelf 2 right arm upper ends, and described the second spacing draw-in groove 6 is L4 with the distance of described compass shelf 2 You Bi upper ends; Described L1, L2, L3 and L4 meet length requirement: L1
2+ L3
2=L4
2;
Described long chi 3 is made up of main scale 3a and secondary chi 3b, and the left arm of one end of described main scale 3a and described compass shelf 2 is hinged, and the other end and described secondary chi 3b are hinged, and the free end of this pair chi 3b stretches in described the second spacing draw-in groove 6; The right outside side of described main scale 3a hinge segment is provided with catch 7, after main scale 3a and secondary chi 3b trail, described catch 7 blocks described secondary chi 3b, and described main scale 3a and secondary chi 3b are arranged on same straight line, and the free end of this pair chi 3b stretches in described the second spacing draw-in groove 6; The left arm inner side of described compass shelf 2 is provided with stopper slot 8, and the lower end of described main scale 3a and short chi 4 and the lower end of described stopper slot 8 are hinged, and after described secondary chi 3b regains and closes up with described main scale 3a, described long chi 3 and short chi 4 can be taken in described stopper slot 8.
As shown in Figure 2, in the first spacing draw-in groove is stretched in the outer end of short chi time, due to L1
2+ L3
2=L4
2,
the left arm and the right wall composition right angled triangle set square that make short chi and compass shelf, wherein Minimum Internal Angle is 30 degree.
As shown in Figure 3, in described the second spacing draw-in groove is stretched in the outer end of long chi time, due to
make the left arm of long chi and compass shelf and the set square of right wall composition isosceles right triangle, wherein Minimum Internal Angle is 45 degree.
Claims (5)
1. a multifunctional compass, is characterized in that: comprise protractor (1) and compass shelf (2), described protractor (1) is fixed on the top of described compass shelf (2); The left arm of described compass shelf (2) is provided with long chi (3) and short chi (4), the length of described long chi (3) and short chi (4) is respectively L2 and L3, the left arm lower hinge of the lower end of this long chi (3) and short chi (4) and described compass shelf (2), the distance of this pin joint and described left arm upper end is L1; The right wall inner side of described compass shelf (2) is provided with the first spacing draw-in groove (5) and the second spacing draw-in groove (6), described the first spacing draw-in groove (5) equals described L1 with the distance of described compass shelf (2) right arm upper end, and described the second spacing draw-in groove (6) is L4 with the distance of described compass shelf (2) You Bi upper end; Described L1, L2, L3 and L4 meet length requirement: L1
2+ L3
2=L4
2;
the outer end of described long chi (3) is stretched in described the second spacing draw-in groove (6), or the outer end of described short chi (4) is stretched in described the first spacing draw-in groove (5).
2. multifunctional compass according to claim 1, it is characterized in that: described long chi (3) comprises main scale (3a) and secondary chi (3b), the left arm of one end of described main scale (3a) and described compass shelf (2) is hinged, the other end and described secondary chi (3b) are hinged, and the free end of this pair chi (3b) stretches in described the second spacing draw-in groove (6).
3. multifunctional compass according to claim 2, it is characterized in that: the right outside side of described main scale (3a) hinge segment is provided with catch (7), after main scale (3a) and secondary chi (3b) trail, described catch (7) blocks described secondary chi (3b), described main scale (3a) and secondary chi (3b) are arranged on same straight line, and the free end of this pair chi (3b) stretches in described the second spacing draw-in groove (6).
4. according to the multifunctional compass described in claim 2 or 3, it is characterized in that: the left arm inner side of described compass shelf (2) is provided with stopper slot (8), the lower end of the lower end of described main scale (3a) and short chi (4) and described stopper slot (8) is hinged, after described secondary chi (3b) is regained and closed up with described main scale (3a), described long chi (3) and short chi (4) can be taken in described stopper slot (8).
5. multifunctional compass according to claim 4, it is characterized in that: described the first spacing draw-in groove (5) and the second spacing draw-in groove (6) are respectively 45 ° and 60 ° with the angle of the right wall of described compass shelf (2), this angle is all towards described compass shelf (2) bottom.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320863436.4U CN203739490U (en) | 2013-12-25 | 2013-12-25 | Multifunctional compasses |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320863436.4U CN203739490U (en) | 2013-12-25 | 2013-12-25 | Multifunctional compasses |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203739490U true CN203739490U (en) | 2014-07-30 |
Family
ID=51339346
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320863436.4U Expired - Fee Related CN203739490U (en) | 2013-12-25 | 2013-12-25 | Multifunctional compasses |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203739490U (en) |
-
2013
- 2013-12-25 CN CN201320863436.4U patent/CN203739490U/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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140730 Termination date: 20141225 |
|
| EXPY | Termination of patent right or utility model |