CN204160961U - A kind of 2 fixed compasses used on blackboards - Google Patents
A kind of 2 fixed compasses used on blackboards Download PDFInfo
- Publication number
- CN204160961U CN204160961U CN201420571834.3U CN201420571834U CN204160961U CN 204160961 U CN204160961 U CN 204160961U CN 201420571834 U CN201420571834 U CN 201420571834U CN 204160961 U CN204160961 U CN 204160961U
- Authority
- CN
- China
- Prior art keywords
- rotating shaft
- turning arm
- crossbeam
- supporting leg
- blackboards
- 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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- Drawing Aids And Blackboards (AREA)
Abstract
The utility model object provides a kind of 2 fixed compasses used on blackboards for prior art Problems existing.The utility model comprises crossbeam, turning arm, and described crossbeam one end is provided with the first supporting leg, and the crossbeam other end is provided with rotating shaft; Described rotating shaft is through crossbeam, and rotating shaft upper end is provided with rotary handle, and rotating shaft lower end is provided with the second supporting leg, and rotating shaft can rotate relative to the second supporting leg; Described turning arm is arranged on the axle body of rotating shaft, and turning arm is circumferential relative to rotating shaft fixing.The utility model solves compasses problem not easily fixing on blackboard, has advantages such as drawing precisely, stable operation, use are simple simultaneously.
Description
Technical field
The utility model relates to a kind of teaching aid, is specifically related to a kind of 2 fixed compasses used on blackboards.
Background technology
Tradition compasses are made up of two adjustable compasses supporting legs, and when blackboard is mapped, because blackboard vertically places, traditional compasses are not easily fixed; In mapping process, due to the instability of fulcrum, often there is skidding in compasses, for user brings inconvenience.
Utility model content
The utility model object provides a kind of 2 fixed compasses used on blackboards for prior art Problems existing.
A kind of 2 fixed compasses used on blackboards, it is characterized in that: comprise crossbeam, turning arm, described crossbeam one end is provided with the first supporting leg, and the crossbeam other end is provided with rotating shaft; Described rotating shaft is through crossbeam, and rotating shaft upper end is provided with rotary handle, and rotating shaft lower end is provided with the second supporting leg, and rotating shaft can rotate relative to the second supporting leg; Described turning arm is arranged on the axle body of rotating shaft, and turning arm is circumferential relative to rotating shaft fixing;
Described turning arm is provided with slide block, and described slide block is provided with trip bolt, and slider bottom is provided with chalk sleeve, and described turning arm is provided with scale;
The termination of described turning arm is provided with limiting plate, and anti-limited slip block departs from turning arm;
The termination of described first supporting leg and the second supporting leg is provided with sucker, promote further compasses when mapping stability;
Described crossbeam is provided with handle, handled easily.
The utility model has following beneficial effect:
The utility model adopts 2 supporting constructions to be fixed on blackboard by compasses, to be moved in a circle conglobate drafting by rotary handle driven rotary arm, can the position of adjusting slider as required during drawing, the utility model solves compasses problem not easily fixing on blackboard, has advantages such as drawing precisely, stable operation, use are simple simultaneously.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Detailed description of the invention
A kind of 2 fixed compasses used on blackboards as described in Figure 1, comprise crossbeam 1, turning arm 2, described crossbeam 1 one end is provided with the first supporting leg 3, and crossbeam 1 other end is provided with rotating shaft 4; Described rotating shaft 4 is through crossbeam 1, and rotating shaft 1 upper end is provided with rotary handle 5, and rotating shaft 1 lower end is provided with the second supporting leg 6, and rotating shaft 1 can rotate relative to the second supporting leg 6; Described turning arm 2 is arranged on the axle body of rotating shaft 1, and turning arm 2 is circumferential relative to rotating shaft 1 fixing; Described turning arm 2 is provided with slide block 7, described slide block 7 is provided with trip bolt 8, is provided with chalk sleeve 9 bottom slide block 7, described turning arm 2 is provided with scale, and the termination of described turning arm 2 is provided with limiting plate 12; The termination of described first supporting leg 3 and the second supporting leg 6 is provided with sucker 10; Described crossbeam 1 is provided with handle 11.
Before using, chalk is loaded in chalk sleeve 9, as required the position of adjusting slider 7 on turning arm 2, and tighten the trip bolt 8 on slide block 7; During use, one holds handle 11, is pressed on blackboard by 2 fixed compasses used on blackboards, and ensures that the sucker 10 of the first supporting leg 3 and the second supporting leg 6 is adsorbed on blackboard panel, and another hand rotates rotary handle 5 driven rotary arm 2 and rotates, and completes mapping.
Claims (5)
1. 2 fixed compasses used on blackboards, is characterized in that: comprise crossbeam (1), turning arm (2), described crossbeam (1) one end is provided with the first supporting leg (3), and crossbeam (1) other end is provided with rotating shaft (4); Described rotating shaft (4) is through crossbeam (1), and rotating shaft (1) upper end is provided with rotary handle (5), and rotating shaft (1) lower end is provided with the second supporting leg (6), and rotating shaft (1) can rotate relative to the second supporting leg (6); Described turning arm (2) is arranged on the axle body of rotating shaft (1), and turning arm (2) is circumferential relative to rotating shaft (1) fixing.
2. a kind of 2 fixed compasses used on blackboards as claimed in claim 1, it is characterized in that: described turning arm (2) is provided with slide block (7), described slide block (7) is provided with trip bolt (8), slide block (7) bottom is provided with chalk sleeve (9), and described turning arm (2) is provided with scale.
3. a kind of 2 fixed compasses used on blackboards as claimed in claim 2, is characterized in that: the termination of described turning arm (2) is provided with limiting plate (12).
4. a kind of 2 fixed compasses used on blackboards as claimed in claim 1, is characterized in that: the termination of described first supporting leg (3) and the second supporting leg (6) is provided with sucker (10).
5. a kind of 2 fixed compasses used on blackboards as claimed in claim 1, is characterized in that: described crossbeam (1) is provided with handle (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420571834.3U CN204160961U (en) | 2014-09-30 | 2014-09-30 | A kind of 2 fixed compasses used on blackboards |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420571834.3U CN204160961U (en) | 2014-09-30 | 2014-09-30 | A kind of 2 fixed compasses used on blackboards |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204160961U true CN204160961U (en) | 2015-02-18 |
Family
ID=52534682
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420571834.3U Expired - Fee Related CN204160961U (en) | 2014-09-30 | 2014-09-30 | A kind of 2 fixed compasses used on blackboards |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204160961U (en) |
-
2014
- 2014-09-30 CN CN201420571834.3U patent/CN204160961U/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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150218 Termination date: 20160930 |