CN103895420A - Multiple proportion compasses - Google Patents
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- CN103895420A CN103895420A CN201410159964.0A CN201410159964A CN103895420A CN 103895420 A CN103895420 A CN 103895420A CN 201410159964 A CN201410159964 A CN 201410159964A CN 103895420 A CN103895420 A CN 103895420A
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Abstract
The invention relates to a pair of multiple proportion compasses and aims to provide a pair of multiple proportion compasses which can be used for fast and accurately finding the midpoint of a segment of straight line and the center of a circle with the segment of straight line as the diameter and fast and accurately completing drawing according to the proportion of 2:1 or 1:2 without performing the operation of being multiplied by two or divided by two, and thick and thin pencils leads can be exchanged fast and accurately. According to the technical scheme, a convex connecting compasses leg and a concave connecting compasses leg intersect with each other in an X shape and can rotate relative to each other around the axis at the point of intersection, the proportion of the distances from the axis to the two ends of the convex connecting compasses leg and the proportion of the distances from the axis to the two ends of the concave connecting compasses leg are respectively 1:2, a thick and thin pencil lead exchange device is arranged, and the plane of a half ball of a convex connector and the plane of a half ball of a concave connector are bonded to form a complete ball. The pair of multiple proportion compasses is not only suitable for drawing teaching and drawing in school but also suitable for drawing use by workers in enterprises and public institutions.
Description
Technical field
The present invention relates to a kind of compasses, particularly a kind of multiple proportions compasses.
Background technology
In the teaching process of drawing or drawing course, compasses are the indispensable instruments for carrying out draw circles or circular arc, are usually used in construction with ruler and compasses.But in drawing course, often can run into the problem of existing one section of its mid point of straight line how to confirm, in known technology, way has two kinds: 1, first measure this line segment length, after remove 2 computings, then measure acquisition mid point to have line segment one end as benchmark; The method is wanted to measure size 2 times, the precision measuring will depend on the precision of measurer used, and in drafting instrument, the precision of the scale on conventional set square, ruler, T-square etc. is accurate to millimeter more, measure at every turn and all can produce one 1 millimeters of following errors, in addition, 2 computing also will be removed in centre, and in this way precision is not high in institute, and takes energy, time-consuming.2, need to do boost line, use compasses pin end to overlap line segment one end therewith, take the length that is greater than this line segment half as radius, respectively paint one section of circular arc 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 i.e. mid point of line segment for this reason of the intersection point that connects these two intersection points and middle line segment, the method step is more, and step is more time-consuming, the more accumulated errors therebetween of step are just larger, when mapping, only need the mid point of this section of straight line, and these four sections of auxiliary circular arcs also need to wipe finding after mid point, comparatively trouble, and time-consuming, sometimes also wipe unclean, make whole drawing more dirty and messy, in addition, while painting the first two circular arc, owing to where not knowing with the intersection point of two circular arcs in back, if the circular arc of drawing is short, likely just can not form two intersection points below when two circular arcs drawing, also to return to and repaint two circular arcs above, if two length that circular arc is drawn above, to increase the success rate crossing with two circular arc lines below, that is again for the work of wiping has below increased workload, visible the method is time-consuming, effort, precision is not high again.
In addition in drawing course, often need to draw circle or the circular arc of heavy line, the circle of fine line or dotted line or dotted line or circular arc, and the pencil-lead that the circle of drafting solid line or circular arc are requirement compasses is selected soft and thick, and the pencil-lead that the circle of drafting fine line or dotted line or dotted line or circular arc are requirement compasses is selected hard and thin, how the thick or thin pencil-lead of speed and convenience conversion just becomes a problem anxious to be resolved, the patent No. is 200420015756.5 utility model patent: Twin core pencil compasses, it is characterized in that being fixed with double end lead for retractable pencil pin by nut on the main pin of compasses, two ends at double end lead for retractable pencil pin is fixed with thickness lead for retractable pencil by cap bag, this technology can realize by rotating double end lead for retractable pencil pin circle or the circular arc of two kinds of lines of picture thickness, but to first unscrew nut when conversion double end lead for retractable pencil pin, rotate again double end lead for retractable pencil pin to correct position, tightening nuts again, just can complete the conversion of thickness lead for retractable pencil, still more time-consuming, effort, and double end lead for retractable pencil pin is difficult to turn to correct position, even if this structure turns to correct position, in drawing course, double end lead for retractable pencil also rotates than being easier to, affect the drafting accuracy of compasses.
In drawing course, also often there will be these problems: how the one section of straight line 1, having existed, for will draw diameter of a circle, finds fast and accurately the center of circle in the situation that not measuring length.2, how known one section of straight line, find fast and accurately mid point in the situation that not measuring length.3,, while using 2:1 or 1:2 ratio to draw, do not take advantage of 2 or just can complete fast and accurately the drawing of 2:1 or 1:2 ratio except 2 computing.How 4 can exchange thickness pencil-lead 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: provide a kind of for the problem of above-mentioned existence and can find fast and accurately the mid point of one section of straight line or the center of circle take this section of straight line as diameter, do not take advantage of 2 or except 2 computing just can complete fast and accurately 2:1 or 1:2 ratio drawing, can exchange fast and accurately the multiple proportions compasses of thickness pencil-lead.
The technical solution adopted in the present invention is: multiple proportions compasses comprise protruding connection compass leg, and to be X-shaped crossing and can be around intersection point place axis recessed connection compass leg composition in relative rotation with protruding connection compass leg, described protruding connection compass leg is separated protruding connection long leg and protruding connection short-leg by the spherical protruding coupling of semicircle, the central axis of the semi-round ball of protruding coupling is 1:2 apart from the distance ratio at protruding connection compass leg two ends, described recessed connection compass leg is separated recessed connection long leg and protruding connection short-leg by the spherical recessed coupling of semicircle, the central axis of the semi-round ball of recessed coupling is 1:2 apart from the distance ratio at recessed connection compass leg two ends.
Semi-round ball plane one side of described protruding coupling arranges columnar turning cylinder, and the end of turning cylinder arranges single spin canting projection, and the oblique grooving with turning cylinder dead in line is set in turning cylinder and single spin canting projection.
According to the multiple proportions compasses shown in claim 2, it is characterized in that: described grooving is 30 ~ 60 degree with the protruding angle that connects long leg or protruding connection short-leg.
The front and back of the plane of the semi-round ball of described protruding coupling and protruding connection long leg and protruding connection short-leg is parallel and be positioned at the centre position of front and back, and the left side of protruding connection long leg and the protruding right side that connects short-leg are positioned at the same plane through the central axis of the semi-round ball of protruding coupling.
The front and back of the plane of the semi-round ball of described recessed coupling and recessed connection long leg and recessed connection short-leg is parallel and be positioned at the centre position of front and back, and the left side of recessed connection long leg and the recessed right side that connects short-leg are positioned at the same plane through the central axis of the semi-round ball of recessed coupling.
The semi-round ball plane one side setting of described recessed coupling and the circular hole of turning cylinder same diameter and length, the end of circular hole arranges the single spin canting groove identical with shape with single spin canting bump sizes, turning cylinder and single spin canting projection penetrate in circular hole and single spin canting groove and form and be hinged, and the semi-round ball plane laminating of the plane of the semi-round ball of protruding coupling and recessed coupling forms a ball.
The end of described protruding connection long leg and protruding connection short-leg arranges thickness pencil-lead conversion equipment, the end of protruding connection short-leg and recessed connection long leg arranges compasses pin, and compasses pin top overlaps with the protruding median surface connecting between short-leg and medial surface and the front-back of recessed connection long leg.
Described thickness pencil-lead conversion equipment comprises two pen core sleeves, spring, acorn nut, and the vertical orientation that described two ends are socketed respectively two pen core sleeves of lead bullion pen core and thin pencil-lead arranges turning cylinder, and turning cylinder end arranges screw thread.
Described protruding connection long leg and the setting of protruding connection short-leg end can embed the groove of two pen core sleeves, turning cylinder penetrates protruding connection long leg or protruding connection short-leg, make two pen core sleeves embed groove, turning cylinder is again through spring, all screw threads of acorn nut and turning cylinder end thread screw completely to revolve motionless till.
The invention has the beneficial effects as follows: 1, it is crossing and can relatively rotate around intersection point place axis that protruding connection compass leg of the present invention and recessed connection compass leg are X-shaped, axis is 1:2 apart from the distance ratio at protruding connection compass leg two ends and recessed connection compass leg two ends, the compasses of two routine techniques are so just formed, and these two compasses positions are opposing, and interlock, wherein the compasses on one side rotate an angle, also can rotate an identical angle with those compasses of its opposing another side, but they paint circle or circular arc is just different large, it is exactly that compasses of short-leg are painted and justified or 2 times of the radius of circular arc that those compasses of long leg are painted circle or the radius of circular arc, the present invention can find the mid point of one section of straight line or the center of circle take this section of straight line as diameter fast and accurately, do not take advantage of 2 or just can complete fast and accurately the drawing of 2:1 or 1:2 ratio except 2 computing.2, the present invention is provided with thickness pencil-lead conversion equipment, if need lead bullion pen core to convert thin pencil-lead to, only need press acorn nut, acorn nut is with regard to Compress Spring, two pen core sleeves are moved, depart from groove, clockwise rotate acorn nut and then drive two pen core sleeves to rotate, two pen core sleeves turn to thin pencil-lead and unclamp acorn nut outside time, two pen core sleeves are just because the effect of spring is returned again and remained in groove, whole process can complete for pressing, rotate, loosing one's grip, and has exchanged fast and accurately thickness pencil-lead.3, it is spherical that protruding coupling of the present invention and recessed coupling are all semicircle, when the present invention works, the plane of the plane of the semi-round ball of protruding coupling and the semi-round ball of recessed coupling is pasted and is combined into complete ball, hand is being pinched this ball, just there is the focusing surface of exerting oneself downward or upward, also can rotate this ball rotate the present invention draw out circle or circular arc, and no matter the angle of opening between the present invention's two legs is large or little, X-shaped intersection is a spheroidal all the time, shape can not change, hand is being pinched feel of the present invention and can not changed, draw front and back are consistent, guarantee the result of use of the present embodiment.
Accompanying drawing explanation
Fig. 1 is schematic perspective view of the present invention.
Fig. 2 is the schematic perspective view of protruding connection compass leg of the present invention.
Fig. 3 is the orthographic projection view of protruding connection compass leg of the present invention.
Fig. 4 is the schematic perspective view of recessed connection compass leg of the present invention.
Fig. 5 is the protruding connection compass leg schematic perspective view that removes thickness pencil-lead conversion equipment of the present invention.
Fig. 6 is the schematic perspective view of of the present invention pair of pen core sleeve.
Fig. 7 is the explosive view of thickness pencil-lead conversion equipment of the present invention.
The specific embodiment
As shown in Figure 1, the present embodiment comprises protruding connection compass leg 1, and with protruding connection compass leg 1 be X-shaped crossing and can around intersection point place axis in relative rotation recessed connection compass leg 2 form, the compasses of two routine techniques are so just formed, and these two compasses positions are opposing, and interlock, wherein the compasses on one side rotate an angle, and those compasses of its opposing another side also can rotate an identical angle, described protruding connection compass leg 1 is separated protruding connection long leg 5 and protruding connection short-leg 6 by the spherical protruding coupling 3 of semicircle, the central axis of the semi-round ball of protruding coupling 3 is 1:2 apart from the distance ratio at protruding connection compass leg 1 two ends, described recessed connection compass leg 2 is separated recessed connection long leg 7 and protruding connection short-leg 8 by the spherical recessed coupling 4 of semicircle, the central axis of the semi-round ball of recessed coupling 4 is 1:2 apart from the distance ratio at recessed connection compass leg 2 two ends, the angle that position two compasses on both sides opposing and interlock open is identical, if leg is long the same, so they paint circle or circular arc equate, the radius of circle or circular arc equates, if the long ratio of leg is 1:2, they paint circle or circular arc is just different large so, it is exactly that compasses of short-leg are painted and justified or 2 times of the radius of circular arc that those compasses of long leg are painted circle or the radius of circular arc.
As shown in Figures 2 to 4, semi-round ball plane one side of protruding coupling 3 arranges columnar turning cylinder 9, the end of turning cylinder 9 arranges single spin canting projection 10, the semi-round ball plane one side setting of recessed coupling 4 and the circular hole 12 of turning cylinder 9 same diameter and length, the end of circular hole 12 arranges the single spin canting groove 13 identical with single spin canting projection 10 size and dimensions, turning cylinder 9 and single spin canting projection 10 penetrate in circular hole 12 and single spin canting groove 13 and form and be hinged, realizing protruding connection compass leg 1 and recessed connection compass leg 2 is the crossing and moving axis 9 that can rotate of X-shaped and relatively rotates, and can not there is axial displacement or separate in protruding connection compass leg 1 in the time rotating with recessed connection compass leg 2, can not there is skew radially, so require the semi-round ball plane one side setting of recessed coupling 4 and the circular hole 12 of turning cylinder 9 same diameter and length, the end of circular hole 12 arranges the single spin canting groove 13 identical with single spin canting projection 10 size and dimensions, and the external diameter of single spin canting projection 10 is greater than the diameter of circular hole 12, if single spin canting projection 10 will enter single spin canting groove 13 through circular hole 12, must there is strain in so single spin canting projection 10, and turning cylinder 9 and single spin canting projection 10 are set to cylindrical shape, oblique grooving 11 with turning cylinder 9 deads in line is set in turning cylinder 9 and single spin canting projection 10, this just for this reason strain reserved the space of distortion, make single spin canting projection 10 that the diameter that strain equals circular hole 12 can inwardly occur and enter single spin canting groove 13 through circular hole 12, single spin canting projection 10 enters single spin canting groove 13 and restores, because single spin canting projection 10 is single spin canting with single spin canting groove 13, when single spin canting projection 10 enters circular hole 12, this spin canting can play the single spin canting projection 10 of guiding strain inwardly occurs, when single spin canting projection 10 enters after single spin canting groove 13 recoveries, because another side does not have spin canting, even have between protruding connection compass leg 1 and recessed connection compass leg 2, the interactional axial force axially separating is existed, because the diameter of projection 10 is greater than the diameter of circular hole 12, can not there is strain in single spin canting projection 10, so protruding connection compass leg 1 can keep stable with the recessed compass leg 2 of connecting between axially.
As shown in Figure 3, oblique grooving 11 with turning cylinder 9 deads in line is set in turning cylinder 9 and single spin canting projection 10, grooving 11 is 30 ~ 60 degree with the protruding angle that connects long leg 5 or protruding connection short-leg 6, in the time of draw circles or circular arc, the downward active force of hand-held protruding coupling 3 and recessed coupling 4 can act on the cylinder of turning cylinder 9 rather than act between grooving 11, can there is not skew radially, can make like this compasses keep higher stability, higher precision.
As shown in Figure 3 to Figure 4, the front and back of the plane of the semi-round ball of protruding coupling 3 and protruding connection long leg 5 and protruding connection short-leg 6 is parallel and be positioned at the centre position of front and back, the left side of protruding connection long leg 5 and the protruding right side that connects short-leg 6 are positioned at the same plane through the central axis of the semi-round ball of protruding coupling 3, the front and back of the plane of the semi-round ball of recessed coupling 4 and recessed connection long leg 7 and recessed connection short-leg 8 is parallel and be positioned at the centre position of front and back, the left side of recessed connection long leg 7 and the recessed right side that connects short-leg 8 are positioned at the same plane through the central axis of the semi-round ball of recessed coupling 4, compasses pin 15 tops overlap with the protruding median surface connecting between short-leg 6 and medial surface and the front-back of recessed connection long leg 7, thereby guarantee pencil-lead summit and compasses pin 15 summits at protruding connection compass leg 1 two ends, the pencil-lead summit at recessed connection compass leg 2 two ends and compasses pin 15 summits, these 5, the centre of sphere of the complete ball of the semi-round ball composition of the semi-round ball of protruding coupling 3 and recessed coupling 4 is positioned at same plane, at protruding connection compass leg 1 with recessed when connecting compass leg 2 and rotating, two ends can remain circle or the arc radius relation of 1:2.
The end of protruding connection long leg 5 and protruding connection short-leg 8 arranges thickness pencil-lead conversion equipment 14, the end of protruding connection short-leg 6 and recessed connection long leg 7 arranges compasses pin 15, make compasses pin 15 be positioned at the same side of the present embodiment, if long leg end compasses right side is compasses pin 15 in use, when rotation comes to use short-leg to draw roundlet or small arc-shaped, still for right side is that compasses pin 15 is more handy like this, efficiency is higher.
Thickness pencil-lead conversion equipment 14 comprises two pen core sleeves 16, spring 17, acorn nut 18 as shown in Figures 5 to 7, the vertical orientation that described two ends are socketed respectively two pen core sleeves 16 of lead bullion pen core 19 and thin pencil-lead 20 arranges turning cylinder 21, turning cylinder 21 ends arrange screw thread, protruding connection long leg 5 and the 8 end settings of protruding connection short-leg can embed the groove 22 of two pen core sleeves 16, in the time of conversion thickness pencil-lead conversion equipment 14, can make 14 screens fast and accurately of thickness pencil-lead conversion equipment, guarantee the precision of drawing, improved service efficiency; Turning cylinder 21 penetrates protruding connection long leg 5 or protruding connection short-leg 8, make two pen core sleeves 16 embed groove 22, turning cylinder 21 is again through spring 17, all screw threads of acorn nut 18 and turning cylinder 21 end thread screw completely, because 18 1 opening one face closures of acorn nut, if all screw threads of acorn nut 18 and turning cylinder 21 end thread screw completely to revolve motionless till, so.Turning cylinder 21 revolves extremely completely with acorn nut 18, and acorn nut 18 clockwise rotates, and between turning cylinder 21 and acorn nut 18, can not relatively rotate again, and turning cylinder 21 must be along with rotating together, and then 14 rotations together of drive thickness pencil-lead conversion equipment, when the present embodiment need to be drawn the circle of heavy line or circular arc, the lead bullion pen core 19 of thickness pencil-lead conversion equipment 14 is outside, thin pencil-lead 20 is interior, if when the circle of drafting fine line or dotted line or dotted line or circular arc, use thin pencil-lead, make thin pencil-lead 20 outside, lead bullion pen core 19 is interior, will change two pen core sleeves 16, now, press acorn nut 18, acorn nut 18 is with regard to Compress Spring 17, two pen core sleeves 16 are moved, depart from groove 22, clockwise rotate acorn nut 18 and then drive two pen core sleeves 16 to rotate, two pen core sleeves 16 turn to thin pencil-lead 20 and unclamp acorn nut 18 outside time, two pen core sleeves 16 are just because the effect of spring 17 is returned again and remained in groove 22.
There is a vertical turning handle rotating shaft upper end of the compass leg intersection of conventional art compasses, hand is being pinched turning handle and is being rotated turning handle and come draw circles or circular arc, and the present embodiment be X-shaped intersect, just there is no the completely turning handle of technology compasses, and that the protruding coupling 3 of the present embodiment and recessed coupling 4 are all semicircle is spherical, when the present embodiment work, the plane of the semi-round ball of the plane of the semi-round ball of protruding coupling 3 and recessed coupling 4 is pasted and is combined into complete ball, hand is being pinched this ball, just there is the focusing surface of exerting oneself downward or upward, also can rotate this ball rotate the present embodiment draw out circle or circular arc, and no matter the angle of opening between the present embodiment two legs is large or little, X-shaped intersection is a spheroidal all the time, shape can not change, hand is being pinched the present embodiment feel and can not changed, draw front and back are consistent, guarantee the result of use of the present embodiment.
If the one section of straight line having existed will be for will draw diameter of a circle, in the situation that not measuring length, find fast and accurately the embodiment in the center of circle to be with the present embodiment: to use the present embodiment, the pin summit of recessed connection long leg 7 and protruding connection long leg 5 ends and pencil-lead summit are placed on to the two ends of this section of straight line, distance between pin summit and the pencil-lead summit of protruding connection short-leg 6 and recessed connection short-leg 8 ends is the radius of this section of straight line, the pencil-lead summit of recessed connection short-leg 8 ends is overlapped one end of section straight line therewith, the position of this section of straight line in place, pin summit of protruding connection short-leg 6 ends is the center of circle, can this section of straight line be that diameter carries out draw circles or circular arc.
If known one section of straight line, in the situation that not measuring length, find fast and accurately the embodiment of mid point to be with the present embodiment: to use the present embodiment, the pin summit of recessed connection long leg 7 and protruding connection long leg 5 ends and pencil-lead summit are placed on to the two ends of this section of straight line, distance between pin summit and the pencil-lead summit of protruding connection short-leg 6 and recessed connection short-leg 8 ends is the half of this section of straight length, the pin summit of protruding connection short-leg 6 ends is overlapped one end of section straight line therewith, the pencil-lead summit of the recessed connection short-leg 8 ends therewith intersection point of section straight line is mid point, can this section of straight line be that diameter carries out draw circles or circular arc.
While using 2:1 ratio to draw, do not take advantage of in 2 the situation of computing, the embodiment that uses the present embodiment to complete fast and accurately the drawing of 2:1 ratio is: according to drawings marked size, measure length or radius with the top of protruding connection short-leg 6 and recessed connection short-leg 8, hand pinches the plane of semi-round ball of protruding coupling 3 and the plane of the semi-round ball of recessed coupling 4 is pasted the complete ball being combined into, and uses the top of recessed connection long leg 7 and protruding connection long leg 5 at the enterprising line length sign of drawing or draw circles or circular arc.
While using 1:2 ratio to draw, do not remove in 2 the situation of computing, the embodiment that uses the present embodiment to complete fast and accurately the drawing of 1:2 ratio is: according to drawings marked size, measure length or radius with the top of recessed connection long leg 7 and protruding connection long leg 5, hand pinches the plane of semi-round ball of protruding coupling 3 and the plane of the semi-round ball of recessed coupling 4 is pasted the complete ball being combined into, and uses the top of protruding connection short-leg 6 and recessed connection short-leg 8 at the enterprising line length sign of drawing or draw circles or circular arc.
The present invention is suitable for drawing teaching and the drawing of school, is also suitable for the staff of the enterprises and institutions use of drawing.
Claims (9)
1. multiple proportions compasses, it is characterized in that: these multiple proportions compasses comprise protruding connection compass leg (1), and to be X-shaped crossing and can be around intersection point place axis recessed connection compass leg (2) composition in relative rotation with protruding connection compass leg (1), described protruding connection compass leg (1) is separated protruding connection long leg (5) and protruding connection short-leg (6) by the spherical protruding coupling (3) of semicircle, the central axis of the semi-round ball of protruding coupling (3) is 1:2 apart from the distance ratio at protruding connection compass leg (1) two ends, described recessed connection compass leg (2) is separated recessed connection long leg (7) and protruding connection short-leg (8) by the spherical recessed coupling (4) of semicircle, the central axis of the semi-round ball of recessed coupling (4) is 1:2 apart from the distance ratio at recessed connection compass leg (2) two ends.
2. according to the multiple proportions compasses shown in claim 1, it is characterized in that: semi-round ball plane one side of described protruding coupling (3) arranges columnar turning cylinder (9), the end of turning cylinder (9) arranges single spin canting projection (10), the oblique grooving (11) of the upper setting of turning cylinder (9) and single spin canting projection (10) and turning cylinder (9) dead in line.
3. according to the multiple proportions compasses shown in claim 2, it is characterized in that: described grooving (11) is 30 ~ 60 degree with the protruding angle that connects long leg (5) or protruding connection short-leg (6).
4. according to the multiple proportions compasses shown in claim 1 or 2, it is characterized in that: the front and back of the plane of the semi-round ball of described protruding coupling (3) and protruding connection long leg (5) and protruding connection short-leg (6) is parallel and be positioned at the centre position of front and back, the left side of protruding connection long leg (5) and the protruding right side that connects short-leg (6) are positioned at the same plane through the central axis of the semi-round ball of protruding coupling (3).
5. according to the multiple proportions compasses shown in claim 1, it is characterized in that: the front and back of the plane of the semi-round ball of described recessed coupling (4) and recessed connection long leg (7) and recessed connection short-leg (8) is parallel and be positioned at the centre position of front and back, the left side of recessed connection long leg (7) and the recessed right side that connects short-leg (8) are positioned at the same plane through the central axis of the semi-round ball of recessed coupling (4).
6. according to the multiple proportions compasses shown in claim 1 or 5, it is characterized in that: the semi-round ball plane one side setting of described recessed coupling (4) and the circular hole (12) of turning cylinder (9) same diameter and length, the end of circular hole (12) arranges the single spin canting groove (13) identical with single spin canting projection (10) size and dimension, turning cylinder (9) and single spin canting projection (10) penetrate in circular hole (12) and single spin canting groove (13) and form and be hinged, the semi-round ball plane laminating of the plane of the semi-round ball of protruding coupling (3) and recessed coupling (4) forms a ball.
7. according to the multiple proportions compasses shown in claim 1, it is characterized in that: the end of described protruding connection long leg (5) and protruding connection short-leg (8) arranges thickness pencil-lead conversion equipment (14), the end of protruding connection short-leg (6) and recessed connection long leg (7) arranges compasses pin (15), and compasses pin (15) top overlaps with the protruding median surface connecting between short-leg (6) and medial surface and the front-back of recessed connection long leg (7).
8. according to the multiple proportions compasses shown in claim 6, it is characterized in that: described thickness pencil-lead conversion equipment (14) comprises two pen core sleeves (16), spring (17), acorn nut (18), the vertical orientation that described two ends are socketed respectively two pen core sleeves (16) of lead bullion pen core (19) and thin pencil-lead (20) arranges turning cylinder (21), and turning cylinder (21) end arranges screw thread.
9. according to the multiple proportions compasses shown in claim 6 or 7, it is characterized in that: described protruding connection long leg (5) and protruding connection short-leg (8) end setting can embed the groove (22) of two pen core sleeves (16), turning cylinder (21) penetrates protruding connection long leg (5) or protruding connection short-leg (8), make two pen core sleeves (16) embed groove (22), turning cylinder (21) is again through spring (17), all screw threads of acorn nut (18) and turning cylinder (21) end thread screw completely to revolve motionless till.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410159964.0A CN103895420B (en) | 2014-04-22 | 2014-04-22 | Multiple proportions compasses |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410159964.0A CN103895420B (en) | 2014-04-22 | 2014-04-22 | Multiple proportions compasses |
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| CN103895420A true CN103895420A (en) | 2014-07-02 |
| CN103895420B CN103895420B (en) | 2015-11-18 |
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| CN201410159964.0A Expired - Fee Related CN103895420B (en) | 2014-04-22 | 2014-04-22 | Multiple proportions compasses |
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| GB1039636A (en) * | 1964-08-11 | 1966-08-17 | Maurice Kidjel | Proportional calipers |
| JPH075792U (en) * | 1993-06-29 | 1995-01-27 | 博 西田 | Proportional compass |
| CN2673667Y (en) * | 2004-02-13 | 2005-01-26 | 周勇 | Twin core pencil compasses |
| CN203792970U (en) * | 2014-04-22 | 2014-08-27 | 浙江水利水电学院 | Multiple proportional compasses |
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2014
- 2014-04-22 CN CN201410159964.0A patent/CN103895420B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE202134C (en) * | ||||
| US2560697A (en) * | 1946-12-16 | 1951-07-17 | Joy Mfg Co | Proportional divider |
| US2770884A (en) * | 1953-08-03 | 1956-11-20 | Joseph F Eckert | Measuring instrument |
| GB1039636A (en) * | 1964-08-11 | 1966-08-17 | Maurice Kidjel | Proportional calipers |
| JPH075792U (en) * | 1993-06-29 | 1995-01-27 | 博 西田 | Proportional compass |
| CN2673667Y (en) * | 2004-02-13 | 2005-01-26 | 周勇 | Twin core pencil compasses |
| CN203792970U (en) * | 2014-04-22 | 2014-08-27 | 浙江水利水电学院 | Multiple proportional compasses |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103895420B (en) | 2015-11-18 |
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