CN103895419B - How than compasses - Google Patents
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- CN103895419B CN103895419B CN201410160146.2A CN201410160146A CN103895419B CN 103895419 B CN103895419 B CN 103895419B CN 201410160146 A CN201410160146 A CN 201410160146A CN 103895419 B CN103895419 B CN 103895419B
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- 230000008878 coupling Effects 0.000 claims abstract description 72
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- 238000005859 coupling reaction Methods 0.000 claims abstract description 72
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 6
- 230000004308 accommodation Effects 0.000 claims description 20
- 230000006835 compression Effects 0.000 claims description 4
- 238000007906 compression Methods 0.000 claims description 4
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 239000003973 paint Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 238000007373 indentation Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000011900 installation process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
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Abstract
The present invention relates to one and compare compasses more.The object of this invention is to provide a kind of can find the mid point of one section of straight line fast and accurately or the center of circle that is diameter with this section of straight line, do not carry out the ratio that is multiplied by or just can complete that corresponding proportion draws fast and accurately divided by the computing of ratio compare compasses more.Technical scheme of the present invention is: arrange multiple surely than hole between the compasses pin of compass leg and pencil-lead, fixed be respectively 2:1,2.5:1,4:1,5:1 than hole to the distance ratio on compass leg two top, fixed than arranging pin slippage slot between hole, the well width of pin slippage slot is less than the fixed diameter than hole, coupling arrangement penetrates corresponding fixed of two compass legs and fetches connection two compass legs than forming hinge in hole, and during work, the semi-round ball planar side of convex coupling and the semi-round ball planar side of recessed coupling are fitted formation one spheroidal.Namely the present invention is suitable for drawing teaching and the drawing of school, is also suitable for enterprises and institutions staff and draws use.
Description
Technical field
The present invention relates to a kind of compasses, particularly one compares compasses more.
Background technology
Draw or drawing course teaching process in, compasses are used to carry out the indispensable instrument drawing circle or circular arc, are usually used in construction with ruler and compasses.But in drawing course, often can run into the problem how existing one section of straight line determines its mid point, in known technology, way has two kinds: 1, first measure this line segment length, after carry out except 2 computings, then with existing line segment one end for benchmark carries out measuring acquisition mid point; The method is wanted to measure size 2 times, the precision measured will depend on the precision of measurer used, and the precision of scale on set square, ruler, T-square etc. conventional in drafting instrument is accurate to millimeter more, measure the error that all can produce less than one 1 millimeters at every turn, in addition, the middle computing also will carried out except 2, in this way precision is not high in institute, and takes energy, time-consuming.2, need to do boost line, compasses pin end is used to overlap line segment one end therewith, to be greater than the length of this line segment half for radius, one section of circular arc is respectively painted on these line segment both sides, and then allow pin end overlap with the line segment other end, respectively paint one section of circular arc with same radius on these line segment both sides, this four arcs forms two intersection points, the intersection point connecting these two intersection points and the middle line segment i.e. mid point of line segment for this reason, the method step is more, and step is more time-consuming, the more accumulated errors therebetween of step are larger, the mid point of this section of straight line is only needed during mapping, and these four sections of auxiliary circular arcs also need erasing after finding mid point, comparatively bother, and it is time-consuming, sometimes also wipe unclean, make whole drawing more dirty and messy, in addition, when drawing the first two circular arc, owing to not knowing with the intersection point of two circular arcs in back where, if the circular arc drawn is short, draw below two circular arcs time likely just can not form two intersection points, also to return to and repaint two circular arcs above, if the length of two circular arc pictures above, to increase the success rate crossing with two circular arc lines below, that is again for erasing work below adds workload, visible the method is time-consuming, effort, precision is not high again, when usage ratio is drawn, need on the basis of dimensioning, carry out the ratio that is multiplied by or the computing divided by ratio, when drawing as used the ratio of 1:2.5, the computing divided by 2.5 will be carried out on the basis of former dimensioning, relatively waste time and energy, sometimes also to carry out the operate approximately rounded up, which in turn reduces the precision of drawing.
In drawing course, often there will be these problems: how the one section of straight line 1, existed, for will draw diameter of a circle, finds the center of circle when not measuring length fast and accurately.2, how known one section of straight line, find mid point fast and accurately when not measuring length.3, when usage ratio is drawn, do not carry out the ratio that is multiplied by or just can complete the drawing of corresponding proportion divided by the computing of ratio fast and accurately.These are all the problems that drawing personnel and drawing educator will solve.
Summary of the invention
The technical problem to be solved in the present invention is: for above-mentioned Problems existing provide a kind of can find the mid point of one section of straight line fast and accurately or the center of circle that is diameter with this section of straight line, do not carry out the ratio that is multiplied by or just can complete that corresponding proportion draws fast and accurately divided by the computing of ratio compare compasses more.
The technical solution adopted in the present invention is: how to comprise two compass legs than compasses, every bar compass leg two ends arrange compasses pin, pencil-lead respectively, arrange multiple surely than hole between the compasses pin of described compass leg and pencil-lead, fixed than arranging pin slippage slot between hole, the well width of pin slippage slot is less than the fixed diameter than hole, coupling arrangement penetrates corresponding fixed of two compass legs and fetches connection two compass legs than forming hinge in hole, and compasses pin and pencil-lead slope inwardly.
Described every bar compass leg arrange 4 fixed than hole, these 4 fixed is respectively 2:1,2.5:1,4:1,5:1 than hole to the distance ratio on compass leg two top.
Described coupling arrangement is made up of convex coupling, spring retainer sheet, spring, recessed coupling, and it is spherical that described convex coupling is set to semicircle, and the semi-round ball planar side centre position of convex coupling arranges shallow slippage slot.
The width of described shallow slippage slot equals the width of compass leg, and the degree of depth of shallow slippage slot equals the thickness of compass leg.
What described shallow slippage slot is arranged with convex coupling semi-round ball central axes is fixed than pin, surely equals the fixed diameter than hole than the diameter of pin, fixed than the length of pin equal two compass legs thickness and.
Described fixed than pin end face being arranged slippage pin, the diameter of slippage pin equals the well width of pin slippage slot, the length of slippage pin be greater than two compass legs thickness and, the end of slippage pin arranges screw thread.
It is spherical that described recessed coupling is set to semicircle, and the semi-round ball planar side centre position of recessed coupling arranges dark slippage slot, and the width of dark slippage slot equals the width of compass leg, and the degree of depth of dark slippage slot equals 3 times of the thickness of compass leg.
The Circularhole diameter of described spring retainer sheet equals the diameter of slippage pin, and the outside diameter of spring retainer sheet is greater than the fixed diameter than hole and is less than the width of dark slippage slot.
Described dark slippage slot is inwardly arranged and the banking stop accommodation hole of recessed coupling semi-round ball central axes, spring accommodation hole, thread connection hole successively, the diameter of banking stop accommodation hole is more than or equal to the outside diameter of spring retainer sheet, the degree of depth of banking stop accommodation hole equals the thickness of spring retainer sheet, the diameter of spring accommodation hole is more than or equal to the large footpath of spring, the degree of depth of spring accommodation hole equals the compression height of spring, and the hole surface in thread connection hole arranges screw thread and equal with the thread size of slippage pin end.
The two sides of described shallow slippage slot are concordant with the two sides of a wherein compass leg, the two sides of dark slippage slot are concordant with the two sides of another compass leg, fixed corresponding the determining than in hole of ratio penetrating the compass leg that two stack than pin, slippage pin penetrates in spring retainer sheet, spring more successively, slippage pin screws in thread connection hole and forms thread connection, and the semi-round ball planar side of convex coupling and the semi-round ball planar side of recessed coupling are fitted formation one spheroidal.
The invention has the beneficial effects as follows: 1, arrange multiple surely than hole between the compasses pin of compass leg of the present invention and pencil-lead, fixed be respectively 2:1 than hole to the distance ratio on compass leg two top, 2.5:1, 4:1, 5:1, fixed than arranging pin slippage slot between hole, the well width of pin slippage slot is less than the fixed diameter than hole, coupling arrangement penetrates corresponding fixed of two compass legs and fetches connection two compass legs than forming hinge in hole, so the ratio that the present invention can carry out commonly using fast and is accurately 1:1, 2:1, 2.5:1, 4:1, 5:1, 1:2, 1:2.5, 1:4, 9 kinds of scale such as 1:5, the mid point of one section of straight line or the center of circle that is diameter with this section of straight line can be found fast and accurately.2, it is spherical that convex coupling of the present invention and recessed coupling are semicircle, during work, the semi-round ball planar side of convex coupling and the semi-round ball planar side of recessed coupling are fitted formation one spheroidal, hand pinches this ball, just there is the focusing surface of exerting oneself downward or upward, also this ball be can rotate and circle or circular arc drawn out to rotate the present invention, and it is large or little regardless of the angle of opening between the present invention two leg, two compass leg intersections are a spheroidal all the time, shape can not change, hand is pinched feel of the present invention and can not to be changed, make draw before and after be consistent, ensure the result of use of the present embodiment.
Accompanying drawing explanation
The schematic perspective view of Fig. 1 to be duty of the present invention be 1:2.5 or 2.5:1.
Fig. 2 is compass leg schematic perspective view of the present invention.
Fig. 3 is coupling arrangement schematic perspective view of the present invention.
Fig. 4 is exploded perspective view of the present invention.
Fig. 5 is convex coupling schematic perspective view of the present invention.
Fig. 6 is recessed coupling schematic perspective view of the present invention.
Fig. 7 is that installation of the present invention or ratio exchange state schematic perspective view.
The schematic perspective view of Fig. 8 to be duty of the present invention be 1:4 or 4:1.
Detailed description of the invention
As shown in Figures 1 to 4, the present embodiment comprises two compass legs 1, every bar compass leg 1 two ends arrange compasses pin 2, pencil-lead 3 respectively, it is multiple fixed than hole 4 to arrange between the compasses pin 2 of compass leg 1 and pencil-lead 3, when carrying out ratio drawing, determine that ratio carries out scale fast and accurately with what realize multiple ratio, determine to arrange pin slippage slot 12 than between hole 4, the well width of pin slippage slot 12 is less than the fixed diameter than hole 4, ensure that the radial position between coupling arrangement 5 and two compass legs 1 is relatively stable, only when needs change ratio, coupling arrangement 5 could carry out slippage to realize the switching of different proportion along pin slippage slot 12, coupling arrangement 5 penetrates the fixed of two compass leg 1 correspondences and fetches connection two compass legs 1 than forming hinge in hole 4, two compass legs 1 are made to intersect in X-shaped and can relatively rotate around point of intersection axis, material is thus formed the compasses of two routine techniques, and these two compasses positions are opposing, and link, wherein the compasses on one side rotate an angle, also an identical angle can be rotated with those compasses of its opposing another side, if opposing two pairs of legs are long the same, so they paint circle or circular arc be equal, the radius of circle or circular arc is equal, two pairs of opposing legs are long different, so they paint circle or circular arc be unequal, the radius of circle or circular arc is unequal, if pair of leg is long, a pair short legs, the long ratio of leg is 1:2, so they paint circle or circular arc is just greatly different, those compasses of long leg paint circle or circular arc radius be exactly that those compasses of short-leg institute paints and justifies or 2 times of radius of circular arc, just can carry out the scale of 1:2 or 2:1, if the long ratio of leg is 1:5 or other ratio, just can carry out the scale of 1:5 or other ratio, compasses pin 2 and pencil-lead 3 slope inwardly, when the opening angle of two compass legs 1 is zero degree, be in the shape of the letter V between compasses pin 2 and pencil-lead 3, but work as the present embodiment in use, article two, there is opening angle between compass leg 1, compasses pin 2 and pencil-lead 3 are with regard to vertical drawing or be similar to vertical drawing, so advantageously in improving the accuracy of drawing.
As shown in Figure 2, the every bar compass leg 1 of the present embodiment arranges 4 to be determined than hole 4, these 4 fixed is respectively 2:1 than hole 4 to the distance ratio on compass leg 1 liang of top, 2.5:1, 4:1, 5:1, when drawing, initial value ratio drawing uses at most, also other scale pattern can be used when needing, according to international standard ISO5455-1979 and standard GB/T/T14690-1993 regulation, magnification ratio should select 2:1, 5:1, 10:1 and more vast scale, reduce in scale should select 1:2, 1:5, 10:1 and smaller scale, also other scale pattern of selection standard regulation is allowed if desired, but the ratio of carrying out ratio drawing conventional in drawing teaching or work is 1:1, 2:1, 2.5:1, 4:1, 5:1, 1:2, 1:2.5, 1:4, 1:5 etc. 9 kinds, and the present embodiment can realize the ratio drawing of above 9 kinds of ratios fast and accurately.
As shown in Figures 3 to 5, the present embodiment coupling arrangement 5 is made up of convex coupling 6, spring retainer sheet 7, spring 8, recessed coupling 9, ensures the connection of two compass legs 1, determines a ratio accurately, and can switch different ratios; It is spherical that described convex coupling 6 is set to semicircle, the semi-round ball planar side centre position of convex coupling 6 arranges shallow slippage slot 10, the width of shallow slippage slot 10 equals the width of compass leg 1, the degree of depth of shallow slippage slot 10 equals the thickness of compass leg 1, compass leg 1 adjacent with shallow slippage slot 10 during work is just stuck in shallow slippage slot 10, compass leg 1 rotates shallow slippage slot 10 and also follows rotation, can ensure that the semi-round ball planar side of convex coupling 6 and the semi-round ball planar side of recessed coupling 9 are fitted formation one spheroidal.
What shallow slippage slot 10 is arranged with convex coupling 6 semi-round ball central axes is fixed than pin 11, determine to equal the fixed diameter than hole 4 than the diameter of pin 11, fixed than the length of pin 11 equal two compass legs 1 thickness and, during work, determine to penetrate the fixed than in hole 4 of two compass legs stacked 1 than pin 11, form the turning cylinder of two compass legs 1, and form a ratio determined.
Determine to arrange slippage pin 13 than on pin 11 end face, the diameter of slippage pin 13 equals the well width of pin slippage slot 12, and the diameter of slippage pin 13 is less than the fixed diameter than hole 4, and slippage pin 13 can be made to slide in pin slippage slot 12, changes scale according to drawing is required; The length of slippage pin 13 be greater than two compass legs 1 thickness and, when changing ratio, the distance that recessed coupling 9 moves two compass leg 1 thickness can be promoted, the fixed disengaging than pin 11 is caused to be determined than hole 4, and the diameter of slippage pin 13 is less than the fixed width equaling pin slippage slot 12 than the diameter in hole 4, such slippage pin 13 just can slippage in pin slippage slot 12, realizes the effect of change ratio; The end of slippage pin 13 arranges screw thread, the hole surface in thread connection hole 17 arranges screw thread and equal with the thread size of slippage pin 13 end, slippage pin 13 screws in thread connection hole 17 and forms thread connection, and it is an organic whole that each parts of the present embodiment are connected.
As shown in Figure 6, it is spherical that the recessed coupling of the present embodiment 9 is set to semicircle, the semi-round ball planar side centre position of recessed coupling 9 arranges dark slippage slot 14, the width of dark slippage slot 14 equals the width of compass leg 1, the degree of depth of dark slippage slot 14 equals 3 times of the thickness of compass leg 1, operationally, the compass leg 1 adjacent with dark slippage slot 14 will be stuck in dark slippage slot 14, when changing ratio or in the installation process of beginning the present embodiment, promote recessed coupling 9 moves two compass leg 1 thickness again distance to convex coupling 6, the fixed disengaging than pin 11 just can be made to determine than hole 4, could change ratio or complete installation.
The Circularhole diameter of spring retainer sheet 7 equals the diameter of slippage pin 13, the outside diameter of spring retainer sheet 7 is greater than the fixed diameter than hole 4 and is less than the width of dark slippage slot 14, such spring retainer sheet 7 just can stop that spring 8 does not move axially to convex coupling 6 side, spring 8 is made to have one to act on the pulling force of convex coupling 6 to recessed coupling 9 direction all the time, fixed remaining on than pin 11 is determined than in hole 4, another effect is in change ratio, be unlikely to spring 8 when carrying out slippage coupling arrangement 5 directly to rub with compass leg 1, the spring wire head friction compass leg 1 being unlikely to spring 8 makes spring 8 or compass leg 1 wear and tear.
Dark slippage slot 14 inwardly arranges the banking stop accommodation hole 15 with recessed coupling 9 semi-round ball central axes successively, spring accommodation hole 16, thread connection hole 17, the diameter of banking stop accommodation hole 15 is more than or equal to the outside diameter of spring retainer sheet 7, the degree of depth of banking stop accommodation hole 15 equals the thickness of spring retainer sheet 7, the diameter of spring accommodation hole 16 is more than or equal to the large footpath of spring 8, the degree of depth of spring accommodation hole 16 equals the compression height of spring 8, when changing ratio or in the installation process of beginning the present embodiment, the distance of two compass leg 1 thickness will be moved by indentation coupling 9, if do not arrange banking stop accommodation hole 15, spring accommodation hole 16, will make the groove depth of dark slippage slot 14 on the basis of 3 times of compass leg 1 thickness, increase the thickness of a spring retainer sheet 7 and the compression height of spring 8 again, the groove of dark slippage slot 14 is so just caused to be attempted too large, thus reduce the thickness at recessed coupling 9 ball top, maybe mechanical requirements can not be met, the breach also making recessed this semi-round ball of coupling 9 cut in addition increases, the ball breach that forms of convex coupling 6 and recessed coupling 9 is too large in use, affect result of use.
When the present embodiment is installed, the fixed of the correspondence of two compass legs 1 is first made to align than hole 4, make thread connection hole 17, spring 8, spring retainer sheet 7, fixed than hole 4, each central axis of slippage pin 13 coincides, by indentation coupling 9, Compress Spring 8, two compass legs 1 are made all to be stuck in dark slippage slot 14, rotating convex coupling 6 makes slippage pin 13 screw in thread connection hole 17, formation one ball until the semi-round ball planar side of convex coupling 6 and the semi-round ball planar side of recessed coupling 9 are fitted, the two sides of shallow slippage slot 10 are concordant with the two sides of a wherein compass leg 1, the two sides of dark slippage slot 14 are concordant with the two sides of another compass leg 1, as shown in Figure 7, unclamp recessed coupling 9, due to the effect of spring 8, determine to remain on the fixed than in hole 4 of two compass legs stacked 1 than pin 11, slippage pin 13 remains on spring retainer sheet 7, in spring 8, namely complete the present embodiment to install.
If known one section of straight line, when not measuring length, the present embodiment is used to find the embodiment of mid point to be fast and accurately: to make surely to remain on the fixed than in hole 4 of the 2:1 of two compass legs 1 than pin 11, if need from other ratio fixed than be transferred to 2:1 hole 4 fixed than in hole 4 time, the distance of two compass leg 1 thickness will be moved by indentation coupling 9, Compress Spring 8, the fixed disengaging than pin 11 determines than hole 4, slippage pin 13 is being determined than in hole 4, unclamp along the fixed of pin slippage slot 12 slippage coupling arrangement 5 to 2:1 than in hole 4, the pin summit of the present embodiment long leg side and pencil-lead summit are placed on the two ends of this section of straight line, namely distance between the pin summit of short-leg side and pencil-lead summit is the half of this section of straight length, the pin summit of short-leg side therewith section straight line one end overlap, the intersection point of the pencil-lead summit of short-leg side section straight line is therewith mid point, namely can this section of straight line be that diameter carries out drafting circle or circular arc.
If existed one section of straight line will be for will draw diameter of a circle, when not measuring length, the present embodiment is used to find the embodiment in the center of circle to be fast and accurately: to make surely to remain on the fixed than in hole 4 of the 2:1 of two compass legs 1 than pin 11, the pin summit of long leg side and pencil-lead summit are placed on the two ends of this section of straight line, namely distance between the pin summit of short-leg side and pencil-lead summit is the radius of this section of straight line, the pencil-lead summit of short-leg side therewith section straight line one end overlap, the position of this section of straight line in place, pin summit of short-leg side is the center of circle, namely can this section of straight line be that diameter carries out drafting circle or circular arc.
Use 1:2, 1:2.5, 1:4, when 1:5 ratio is drawn, when not carrying out the computing except ratio value, the embodiment using the present embodiment to complete corresponding proportion drawing is fast and accurately: make to determine to remain on the corresponding fixed than in hole 4 of two compass legs 1 than pin 11, according to drawings marked size, two tops of long leg side are used to measure length or radius, the semi-round ball planar side of semi-round ball planar side and recessed coupling 9 that hand pinches convex coupling 6 is fitted the ball formed, two tops of short-leg side are used to indicate at the enterprising line length of drawing or draw circle or circular arc, 1:2.5 ratio can be carried out as shown in Figure 1 draw, 1:5 ratio can be carried out as shown in Figure 7 draw.
Use 2:1, 2.5:1, 4:1, when 5:1 ratio is drawn, when not carrying out the computing taking advantage of ratio value, the embodiment using the present embodiment to complete corresponding proportion drawing is fast and accurately: make to determine to remain on the corresponding fixed than in hole 4 of two compass legs 1 than pin 11, according to drawings marked size, two tops of short-leg side are used to measure length or radius, the semi-round ball planar side of semi-round ball planar side and recessed coupling 9 that hand pinches convex coupling 6 is fitted the ball formed, two tops of long leg side are used to indicate at the enterprising line length of drawing or draw circle or circular arc, 2.5:1 ratio can be carried out as shown in Figure 1 draw, 5:1 ratio can be carried out as shown in Figure 7 draw.
When using 1:1 ratio to draw, short-leg side or long leg side can be selected can to draw without the need to regulating ratio according to dimensioning size.
Namely the present invention is suitable for drawing teaching and the drawing of school, is also suitable for enterprises and institutions staff and draws use.
Claims (5)
1. compare compasses one kind more, it comprises two compass legs (1), every bar compass leg (1) two ends arrange compasses pin (2) respectively, pencil-lead (3), it is multiple fixed than hole (4) to arrange between the compasses pin (2) of compass leg (1) and pencil-lead (3), determine to arrange pin slippage slot (12) than between hole (4), the well width of pin slippage slot (12) is less than the fixed diameter than hole (4), fixed middle than hole (4) hinge that formed that coupling arrangement (5) penetrates two compass legs (1) corresponding fetches connection two compass legs (1), compasses pin (2) and pencil-lead (3) slope inwardly, every bar compass leg (1) arranges 4 and determines than hole (4), these 4 fixed is respectively 2:1 than hole (4) to the distance ratio on compass leg (1) two top, 2.5:1, 4:1, 5:1, coupling arrangement (5) is by convex coupling (6), spring retainer sheet (7), spring (8), recessed coupling (9) forms, it is spherical that described convex coupling (6) is set to semicircle, the semi-round ball planar side centre position of convex coupling (6) arranges shallow slippage slot (10), it is characterized in that: the width of described shallow slippage slot (10) equals the width of compass leg (1), the degree of depth of shallow slippage slot (10) equals the thickness of compass leg (1),
Described shallow slippage slot (10) is upper, and to arrange with convex coupling (6) semi-round ball central axes fixed than pin (11), surely equals the fixed diameter than hole (4) than the diameter of pin (11), fixed than the length of pin (11) equal two compass legs (1) thickness and;
Describedly fixed arrange slippage pin (13) than on pin (11) end face, the diameter of slippage pin (13) equals the well width of pin slippage slot (12), the length of slippage pin (13) be greater than two compass legs (1) thickness and, the end of slippage pin (13) arranges screw thread.
2. according to claim 1 many than compasses, it is characterized in that: it is spherical that described recessed coupling (9) is set to semicircle, the semi-round ball planar side centre position of recessed coupling (9) arranges dark slippage slot (14), the width of dark slippage slot (14) equals the width of compass leg (1), and the degree of depth of dark slippage slot (14) equals 3 times of the thickness of compass leg (1).
3. according to claim 1 many than compasses, it is characterized in that: the Circularhole diameter of described spring retainer sheet (7) equals the diameter of slippage pin (13), the outside diameter of spring retainer sheet (7) is greater than the fixed diameter than hole (4) and is less than the width of dark slippage slot (14).
4. according to claim 2 many than compasses, it is characterized in that: described dark slippage slot (14) inwardly arranges the banking stop accommodation hole (15) with recessed coupling (9) semi-round ball central axes successively, spring accommodation hole (16), thread connection hole (17), the diameter of banking stop accommodation hole (15) is more than or equal to the outside diameter of spring retainer sheet (7), the degree of depth of banking stop accommodation hole (15) equals the thickness of spring retainer sheet (7), the diameter of spring accommodation hole (16) is more than or equal to the large footpath of spring (8), the degree of depth of spring accommodation hole (16) equals the compression height of spring (8), the hole surface in thread connection hole (17) arranges screw thread and equal with the thread size of slippage pin (13) end.
5. according to claim 1 or 2 or 3 or 4, compare compasses more, it is characterized in that: the two sides of described shallow slippage slot (10) are concordant with the two sides of a wherein compass leg (1), the two sides of dark slippage slot (14) are concordant with the two sides of another compass leg (1), fixed corresponding the determining than in hole (4) of ratio penetrating two compass legs stacked (1) than pin (11), slippage pin (13) penetrates spring retainer sheet (7) more successively, in spring (8), slippage pin (13) screws in thread connection hole (17) and forms thread connection, the semi-round ball planar side of convex coupling (6) and the semi-round ball planar side of recessed coupling (9) are fitted formation one spheroidal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410160146.2A CN103895419B (en) | 2014-04-22 | 2014-04-22 | How than compasses |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410160146.2A CN103895419B (en) | 2014-04-22 | 2014-04-22 | How than compasses |
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| Publication Number | Publication Date |
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| CN103895419A CN103895419A (en) | 2014-07-02 |
| CN103895419B true CN103895419B (en) | 2015-11-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410160146.2A Expired - Fee Related CN103895419B (en) | 2014-04-22 | 2014-04-22 | How than compasses |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2560697A (en) * | 1946-12-16 | 1951-07-17 | Joy Mfg Co | Proportional divider |
| US2645021A (en) * | 1952-01-04 | 1953-07-14 | Mary T Dierkes | Proportioning divider |
| CN2044936U (en) * | 1989-03-24 | 1989-09-27 | 彭勇敢 | Bisector proportional compasses |
| CN2046080U (en) * | 1989-04-10 | 1989-10-18 | 彭勇敢 | Trigonometric function and optimum seeking point proportional dividers |
| GB2232381A (en) * | 1989-06-09 | 1990-12-12 | F J Regamey | Proportional dividers |
| CN203805576U (en) * | 2014-04-22 | 2014-09-03 | 浙江水利水电学院 | Multi-proportion compasses |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2380455A (en) * | 2001-07-17 | 2003-04-09 | Ronald Goldie | Proportioning device and imaging aid. |
-
2014
- 2014-04-22 CN CN201410160146.2A patent/CN103895419B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2560697A (en) * | 1946-12-16 | 1951-07-17 | Joy Mfg Co | Proportional divider |
| US2645021A (en) * | 1952-01-04 | 1953-07-14 | Mary T Dierkes | Proportioning divider |
| CN2044936U (en) * | 1989-03-24 | 1989-09-27 | 彭勇敢 | Bisector proportional compasses |
| CN2046080U (en) * | 1989-04-10 | 1989-10-18 | 彭勇敢 | Trigonometric function and optimum seeking point proportional dividers |
| GB2232381A (en) * | 1989-06-09 | 1990-12-12 | F J Regamey | Proportional dividers |
| CN203805576U (en) * | 2014-04-22 | 2014-09-03 | 浙江水利水电学院 | Multi-proportion compasses |
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| Publication number | Publication date |
|---|---|
| CN103895419A (en) | 2014-07-02 |
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