阅读说明：本技术 一种精密长杆圆规 (A kind of precision stock compasses ) 是由 关高文 翟梓曦 于 2019-06-28 设计创作，主要内容包括：本发明公开了一种精密长杆圆规,包括长尺、第一活动滑块及第二活动滑块,所述长尺上设有刻度线,所述第一活动滑块及第二活动滑块均设置成相对长尺滑动；所述第一活动滑块上设有第一锁紧装置,所述第一锁紧装置锁紧时,第一活动滑块相对长尺固定；所述第二活动滑块上设有第二锁紧装置,所述第二锁紧装置锁紧时,第二活动滑块相对长尺固定；所述第一活动滑块上设有定心针,所述第二活动滑块上设有绘图工具,所述定心针及绘图工具均与刻度线平行。本发明精密长杆圆规的定心针与绘图工具之间的距离等于刻度线上标示的距离、且距离可以大于1m,各个组件之间配合灵活、安装方便,适用场合广泛。(The invention discloses a kind of accurate stock compasses, including long ruler, the first movable slider and the second movable slider, the long ruler is equipped with graduation mark, and first movable slider and the second movable slider, which are all provided with, is set to relatively long ruler sliding；First movable slider is equipped with the first locking device, and when first locking device is locked, the relatively long ruler of the first movable slider is fixed；Second movable slider is equipped with the second locking device, and when second locking device is locked, the relatively long ruler of the second movable slider is fixed；First movable slider is equipped with centering pin, and second movable slider is equipped with drawing tool, and the centering pin and drawing tool are parallel with graduation mark.The distance between centering pin and drawing tool of precision stock compasses of the invention are equal on graduation mark indicate at a distance from and distance can cooperate flexible, easy for installation between various components greater than 1m, applicable situation is extensive.)

1. a kind of precision stock compasses, which is characterized in that including long ruler, the first movable slider and the second movable slider, the length Ruler is equipped with graduation mark, and first movable slider and the second movable slider, which are all provided with, is set to relatively long ruler sliding；

First movable slider is equipped with the first locking device, when first locking device is locked, the first movable slider phase Long ruler is fixed；Second movable slider is equipped with the second locking device, when second locking device is locked, the second activity The relatively long ruler of sliding block is fixed；

First movable slider be equipped with centering pin, second movable slider be equipped with drawing tool, the centering pin and Drawing tool is parallel with graduation mark.

2. precision stock compasses according to claim 1, which is characterized in that first movable slider includes the first socket Groove, two ends of first socket groove are equipped with first armful of pincers, and second movable slider includes the second socket groove, Two ends of second socket groove are equipped with second armful of pincers；

First socket groove and the second socket groove cover spreading ruler, and first armful of pincers and second armful of pincers are equipped with long ruler The one side of graduation mark abuts.

3. precision stock compasses according to claim 2, which is characterized in that first movable slider, which is equipped with, mutually to hang down Straight first through hole and first positioning hole, and first positioning hole extends to first through hole；

When assembling, centering pin passes through first through hole, and the first positioning screw passes through first positioning hole and abuts centering pin.

4. precision stock compasses according to claim 2, which is characterized in that second movable slider, which is equipped with, mutually to hang down The second straight through-hole and second location hole, and second location hole extends to the second through-hole；

When assembling, drawing tool passes through the second through-hole, and the second positioning screw passes through second location hole and abuts drawing tool.

5. precision stock compasses according to claim 2, which is characterized in that first locking device includes the first locking Screw and the first locking hole on the first movable slider, second locking device include the second lock-screw and are set to the The second locking hole on two movable sliders；

When assembling, the first lock-screw passes through the first locking hole and abuts long ruler, and the second lock-screw passes through the second locking hole simultaneously Abut long ruler.

6. precision stock compasses according to claim 2, which is characterized in that further include the first transparent panel for covering graduation mark And second transparent panel, it is equipped with the first clamping groove between two ends of first socket groove and first armful of pincers, described second The second clamping groove is equipped between two ends of socket groove and second armful of pincers；

When assembling, first transparent panel is embedded in the first clamping groove, and second transparent panel is embedded in the second clamping groove, and first is transparent Plate and the first socket groove surround long ruler, and the second transparent panel and the second socket groove surround long ruler.

7. precision stock compasses according to claim 6, which is characterized in that be equipped with a pair at the top of first movable slider First balance hole, first balance hole extend to the first transparent panel, and it is flat to be equipped with a pair second at the top of second movable slider Weighing apparatus hole, second balance hole extend to the second transparent panel；

When assembling, a pair of of mass screw is each passed through a pair of first balance hole to abut the first transparent panel, another pair mass screw A pair of second balance hole is each passed through to abut the second transparent panel.

8. precision stock compasses according to claim 7, which is characterized in that on first transparent panel and the second transparent panel Label has filament, and the positioning filament is parallel with graduation mark, and positions filament and centering pin on the first transparent panel Central axes are concordant, and the positioning filament on the second transparent panel is concordant with the central axes of drawing tool.

9. precision stock compasses according to claim 2, which is characterized in that the long ruler includes stock and graduated scale, institute It states graduated scale to be arranged along stock long axis direction, and the graduated scale is bonded with stock.

10. precision stock compasses according to claim 9, which is characterized in that the stock is rectangular tube, the rectangular tube Both ends are equipped with ruler end plug, and the ruler end plug includes obturating plug and the chock plug on obturating plug；

The chock plug is inserted into rectangular tube, and on the cross section of rectangular tube, the obturating plug is extended to outside the cross section of rectangular tube.

Technical field

The present invention relates to educational aid field more particularly to a kind of accurate stock compasses.

Background technique

Mathematics plays irreplaceable role in development of human history and social life, in the course of contemporary student, Mathematics is also required course, along with economy continue to develop, people's living standard be continuously improved, people for educational undertaking increasingly To value, the demand of facility for study constantly increases, for taking high school mathematics student Geometric figure drawing plate, current high school mathematics student It is different with Geometric figure drawing plate pattern, wherein just including being usually used in the compasses of picture circle and production mark line, but there is also many problems It influences to use.

Currently, compasses on the market have teaching or learning tool compasses, arc radius can be drawn and be no more than 50 centimetres, size model It encloses small.Another compasses tool is used in carpenter, glass, building trade, draws arc radius often beyond 1 meter, but there are scales Positioning is not accurate, is easy to produce variation, draws the problems such as circular arc numerical value is inaccurate, and adjustment numerical value is cumbersome, not flexible.

Summary of the invention

For overcome the deficiencies in the prior art, the accurate stock compasses novel the purpose of the present invention is to provide one kind, with Overcome the radius that round or circular arc are drawn existing for existing compasses is too short, scale positioning not precisely, be easy to produce variations, drafting circular arc The problems such as numerical value is inaccurate, adjustment numerical value is cumbersome, not flexible.

The purpose of the present invention adopts the following technical scheme that realization:

A kind of precision stock compasses, including long ruler, the first movable slider and the second movable slider, the long ruler, which is equipped with, to be carved Line is spent, first movable slider and the second movable slider, which are all provided with, is set to relatively long ruler sliding；

First movable slider is equipped with the first locking device, and when first locking device is locked, the first activity is sliding The relatively long ruler of block is fixed；Second movable slider is equipped with the second locking device, when second locking device is locked, second The relatively long ruler of movable slider is fixed；

First movable slider is equipped with centering pin, and second movable slider is equipped with drawing tool, the centering Needle and drawing tool are parallel with graduation mark.

Further, first movable slider includes the first socket groove, and two ends of first socket groove are equal It is clamped equipped with first armful, second movable slider includes the second socket groove, and two ends of second socket groove are equipped with Second armful of pincers；

First socket groove and the second socket groove cover spreading ruler, and first armful of pincers and second armful of pincers and long ruler One side equipped with graduation mark abuts.

Further, first movable slider is equipped with orthogonal first through hole and first positioning hole, and first Location hole extends to first through hole；

When assembling, centering pin passes through first through hole, and the first positioning screw passes through first positioning hole and abuts centering pin.

Further, second movable slider is equipped with orthogonal second through-hole and second location hole, and second Location hole extends to the second through-hole；

When assembling, drawing tool passes through the second through-hole, and the second positioning screw passes through second location hole and abuts drawing tool.

Further, first locking device includes the first lock-screw and the first lock on the first movable slider Tieholen, second locking device include the second lock-screw and the second locking hole on the second movable slider；

When assembling, the first lock-screw passes through the first locking hole and abuts long ruler, and the second lock-screw passes through the second locking Hole simultaneously abuts long ruler.

It further, further include the first transparent panel and the second transparent panel for covering graduation mark, first socket groove The first clamping groove is equipped between two ends and first armful of pincers, between two ends of second socket groove and second armful of pincers Equipped with the second clamping groove；

When assembling, the first clamping groove of the first transparent panel insertion, the second clamping groove of the second transparent panel insertion, first Transparent panel and the first socket groove surround long ruler, and the second transparent panel and the second socket groove surround long ruler.

Further, a pair of first balance hole is equipped at the top of first movable slider, first balance hole extends to First transparent panel, the second movable slider top are equipped with a pair of second balance hole, and second balance hole extends to second thoroughly Isotropic disk；

When assembling, a pair of of mass screw is each passed through a pair of first balance hole to abut the first transparent panel, another pair balance Screw is each passed through a pair of second balance hole to abut the second transparent panel.

Further, label has a filament on first transparent panel and the second transparent panel, the positioning filament and Graduation mark is parallel, and the positioning filament on the first transparent panel is concordant with the central axes of centering pin, and the positioning on the second transparent panel is thin Line is concordant with the central axes of drawing tool.

Further, the long ruler includes stock and graduated scale, and the graduated scale is arranged along stock long axis direction, and described Graduated scale is bonded with stock.

Further, the stock is rectangular tube, and the rectangular tube both ends are equipped with ruler end plug, and the ruler end plug includes plug Seat and the chock plug on obturating plug；

The chock plug is inserted into rectangular tube, and on the cross section of rectangular tube, the obturating plug is extended to outside the cross section of rectangular tube.

Compared with prior art, the beneficial effects of the present invention are:

Precision stock compasses of the invention include long ruler, the first movable slider and the second movable slider, and long ruler is equipped with scale Line, and the first movable slider and the second movable slider are all provided with and are set to relatively long ruler sliding, from there through the graduation mark essence on long ruler Really measurement the distance between the first movable slider and the second movable slider.First movable slider is equipped with the first locking device, the When one locking device is locked, the relatively long ruler of the first movable slider is fixed, from there through the first locking device by the first movable slider It is fixed on long ruler.Second movable slider is equipped with the second locking device, when the second locking device is locked, the second movable slider phase Long ruler is fixed, the second movable slider is fixed on long ruler from there through the second locking device.First movable slider is equipped with Centering pin, the second movable slider are equipped with drawing tool, and centering pin and drawing tool are parallel with graduation mark.When movable by first It is living by first by the first locking device and the second locking device after the distance between sliding block and the second movable slider are set Movable slider and the second movable slider fix, and prevent the loosening of centering pin and drawing tool, in addition, centering pin and drawing tool are flat Row setting, it is ensured that the distance between centering pin and drawing tool on graduation mark exactly equal at a distance from indicating and distance can be big In 1m, in addition, cooperating flexible, easy for installation between various components, applicable situation is extensive.

Detailed description of the invention

Fig. 1 is the structural schematic diagram of one embodiment of the present invention precision stock compasses；

Fig. 2 is the partial enlarged view of precision stock compasses shown in Fig. 1；

Fig. 3 is the partial enlarged view of precision stock compasses shown in Fig. 1；

Fig. 4 is the structural schematic diagram of the first movable slider；

Fig. 5 is the structural schematic diagram of the second movable slider；

Fig. 6 is the explosive view of the first movable slider；

Fig. 7 is the structural schematic diagram of ruler end plug.

In figure: 1, long ruler；11, stock；12, graduated scale；2, the first movable slider；21, the first locking device；211, first Lock-screw；212, the first locking hole；22, centering pin；23, the first socket groove；24, first armful of pincers；25, first through hole；26, First positioning hole；27, the first clamping groove；28, the first balance hole；3, the second movable slider；31, the second locking device；32, it draws Tool；33, the second socket groove；34, second armful of pincers；4, the first positioning screw；5, the first transparent panel；61, obturating plug；62, chock plug.

Specific embodiment

In the following, being described further in conjunction with attached drawing and specific embodiment to the present invention, it should be noted that not Under the premise of conflicting, new implementation can be formed between various embodiments described below or between each technical characteristic in any combination Example.