CN105825765A - Flexibly drawn straight line three-side projection demonstration board - Google Patents
Flexibly drawn straight line three-side projection demonstration board Download PDFInfo
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- CN105825765A CN105825765A CN201610399321.2A CN201610399321A CN105825765A CN 105825765 A CN105825765 A CN 105825765A CN 201610399321 A CN201610399321 A CN 201610399321A CN 105825765 A CN105825765 A CN 105825765A
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B25/00—Models for purposes not provided for in G09B23/00, e.g. full-sized devices for demonstration purposes
- G09B25/02—Models for purposes not provided for in G09B23/00, e.g. full-sized devices for demonstration purposes of industrial processes; of machinery
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Abstract
The invention provides a flexibly drawn straight line three-side projection demonstration board which is composed of a projection board body, a projection connection line mechanism and a straight line projection mechanism; by means of the projection connection line mechanism driven by a flexible rope, it is guaranteed that the connection line of a front projection and a horizontal projection of straight line movable points is perpendicular to the X axis, and it is guaranteed that the front projection and the side projection of the straight line movable points are perpendicular to the Z axis; the stretching and contracting straight line projection mechanism is adopted, the projection length of the straight line can be changed, and various position situations of the spatial straight line are met; with scales and numerical values arranged on a translation frame as reference, the distance between the horizontal projection of the movable points and the X axis is equal to the distance between the side projection and Z axis; when the flexibly drawn straight line three-side projection demonstration board is utilized, three projection caps of the movable points are screwed loosely with hands, and the projection caps are screwed tightly after the three projections of the movable points are moved to the designated positions. A dynamic changeable object teaching aid replaces seven unchanged teaching aids, and the dynamic demonstration effect is remarkably improved.
Description
Technical field
The present invention relates to used by a kind of demonstration teaching aid, especially Engineering Drawing CourseThe straight line three-plane projection demonstration board of flexible drawing。
Background technology
In Engineering Drawing Course, represent that the locus of straight line is determined by the projection on three perspective planes, the i.e. front projection of straight line, floor projection and side projection, straight line is represented by the straightway comprising two end points, require to must assure that the front projection of same end points and the line vertical X axis of floor projection, the line vertical Z axle of front projection and side projection, the distance of floor projection to X-axis is equal to the distance of side projection to Z axis.Space line has seven kinds of situations relative to the position on perspective plane, it is frontal line, horizontal line, profile line, vertical frontal line, plumb line, vertical profile line and parallax respectively, in Engineering Drawing Course is imparted knowledge to students, need to demonstrate this seven kinds of straight lines respectively by front projection, floor projection and side projection.At present, demonstrating these seven kinds of straight lines is to use seven mock-up teaching aids or draw its three-plane projection drawing on blackboard.If using mock-up teaching aid, each teaching aid is all changeless, and its shortcoming is bulky, carrying, carrying, moves and hang inconvenience, drawing its three-plane projection drawing if used on blackboard, need the more time, take bigger blackboard space, and dynamic demonstration effect is bad.Affect quality of instruction.
Summary of the invention
In order to solve the problems referred to above, the present invention provides the straight line three-plane projection demonstration board of a kind of flexible drawing, the straight line three-plane projection demonstration board of this flexible drawing uses an end points of straight line to fix, the form that another end points is movable, use projection join line mechanism that flexible drawing drives and the mechanism of linear projection can not only the convenient, flexible position quickly showing 7 kinds of straight lines, but also can guarantee that the front projection of straight line end points and the line vertical X axis of floor projection, the front projection of straight line end points and the line vertical Z axle of side projection.To solve above-mentioned problem of the prior art.
The technical solution adopted for the present invention to solve the technical problems is: the straight line three-plane projection demonstration board of flexible drawing includes projection plate, projection join line mechanism, mechanism of linear projection.
Projection plate is provided with X-axis, YH axle, Yw axle and Z axis, and X-axis, YH axle, Yw axle and Z axis are divided into frontal plane of projection, horizontal plane, lateral projection face and YHYw face projection plate.YHYw face is provided with angle separated time.If the end points of straightway is fixed point and dynamic point.Fixed point is motionless point, and the frontal plane of projection of fixed point, floor projection and side projection are located at the centre on respective perspective plane, and the frontal plane of projection of fixed point, floor projection and side projection are respectively equipped with fixed point groove, and fixed point groove is ladder circular hole.The frontal plane of projection of fixed point and the line vertical X axis of floor projection, be set to left fixed point projection join line；The frontal plane of projection of fixed point and the line vertical Z axle of side projection, be set to upper fixed point projection join line；The floor projection of fixed point is to the distance of X-axis equal to the side projection pinpointed to the distance of Z axis, and the line of the floor projection of fixed point to angle separated time is set to lower fixed point projection join line, and the line of the side projection of fixed point to angle separated time slideway is set to right fixed point projection join line.The truncation surface of X-axis, YH axle, Yw axle, Z axis, left fixed point projection join line, right fixed point projection join line, upper fixed point projection join line, lower fixed point projection join line and angle separated time is rectangular channel.
Projection join line mechanism includes pan carriage, change gear, change gear axle, pulley, pulley spindle, flexible strand, rope support and rope support screw.Pan carriage has two, is upper pan carriage and left frame respectively.The lower semisection of half section of the right side of upper pan carriage and left frame is provided with scale and numerical value, with this with reference to side projection and the position of side projection.Pan carriage is c-type strip structure, and pan carriage two ends are hooked on projection plate.Pan carriage is provided with bar shaped locating slot, and locating slot has chute, and chute is narrower than locating slot.Left frame upper end is provided with change gear axle, and change gear axle is cased with change gear, and change gear rides over projection plate upper end.After projection plate, all pan carriage are respectively arranged at two ends with pulley spindle, pulley it is cased with on pulley spindle, pulley is provided with two slideways, each slideway is respectively wound with a flexible strand, flexible strand has four, and each pulley is wound with two flexible strand, and the two ends of every flexible strand are separately fixed on the rope support of projection plate two sides.Rope support has eight, and rope support is fixed on the angle of four sides of projection plate by rope support screw symmetry.Every flexible strand walks around pulley rear steering another pulley to same pan carriage, turns again to be connected with rope support, becomes the Z-shaped shape of Z or anti-；Fixing and the trend of another flexible strand corresponding thereto is symmetrical with previous bar flexible strand, and two flexible strand are contrary with the winding direction of same pulley；To guarantee that pan carriage can translational motion on projection plate.
nullMechanism of linear projection includes fixed point、Dynamic point and projection join line，Fixed point includes pinpointing front projection、Point level projection and fixed point side projection，Each projection is by pinpointing bearing、Fixed point cap、Fixed point axle、Fixed point wind spring and linear projection's composition，In fixed point groove on perspective plane, fixed point bearing is installed，It is cased with pinpointing cap outside the inner ring of fixed point bearing，Fixed point cap is provided with fixed point opening，Fixed point cap divides fixed point front projection cap、Point level projection hat and fixed point side projection cap，Fixed point bearing inner race is installed with fixed point axle，On fixed point axle, fixed point wind spring is installed，The inner of fixed point wind spring is connected with fixed point axle，The outer end of fixed point wind spring is connected with linear projection，Linear projection is flexible thin strip，It is divided into straight line front projection、Straight horizontal projection and straight line side projection，Linear projection is wrapped on fixed point wind spring，Linear projection is reached on projection plate by fixed point opening，It is connected with dynamic.Linear projection is the most exceptionally straight on projection plate under the pulling of fixed point wind spring, and length is variable.Dynamic point includes the front projection of dynamic point, dynamic some floor projection and a dynamic some side projection, each projection by slide block, projection fixture block, sell, a dynamic some shell, a dynamic some wind spring, dynamic spot projection line and a dynamic some cap form.Slide block is the assembly of cuboid and cylinder, cylindrical hole is had in the cylinder of slide block, two projection fixture blocks it are provided with in through hole, projection fixture block is half stepped cylindrical shape, linear projection is clamped in contact surface between two projection fixture blocks, two projection fixture blocks are connected into stepped cylindrical by pin, and projection fixture block can rotate in the cylindrical hole of slide block；The cuboid of slide block puts into the locating slot of pan carriage, and slide block can slide in locating slot；The chute of pan carriage put into by cylinder on slide block.The cylindrical outer side of the slide block of front projection connects the inner having two dynamic some wind springs arranged side by side, two dynamic some wind spring outer ends of dynamic some front projection connect left dynamic spot projection line and upper dynamic spot projection line respectively, the cylindrical outer side of the slide block of dynamic some floor projection and side projection connects the inner having a dynamic some wind spring, connect the dynamic spot projection line in a left side outside dynamic some wind spring of floor projection, outside the wind spring of side projection, connect upper dynamic spot projection line.The truncation surface of dynamic some wind spring is circular.The outside of three projections of dynamic point is cased with dynamic some shell, and dynamic some shell is provided with circular hole, and dynamic spot projection line is by circular hole to another dynamic spot projection, and dynamic spot projection line is under the pulling of dynamic some wind spring, the most exceptionally straight on projection plate, and length is variable.Dynamic some cap is divided into dynamic some front projection cap, dynamic some floor projection cap and dynamic some side projection cap, and dynamic some cap is tightened on the screw of slide block cylinder by screw thread, is fixed by dynamic spot projection locked on movable stand.
Perspective plane uses white, projection join line and font to use black, and pan carriage uses transparent material, dynamic point and fixed point to use redness, and linear projection uses eye-catching color.
The invention has the beneficial effects as follows: the projection join line mechanism using soft type rope to drive, making straight line move front projection a little and floor projection line ensures vertical X axis, straight line moves front projection a little and side projection ensures vertical Z axle；Use mechanism of telescopic linear projection, make the projected length alterable of straight line, meet the situation of the various positions of space line.The present invention object visual of one dynamically changeable instead of 7 constant teaching aids, and dynamic demonstration effect is obviously improved.
Accompanying drawing explanation
The present invention is further described with embodiment below in conjunction with the accompanying drawings.
Fig. 1 is to express integrally-built above axonometric chart.
Fig. 2 is to express integrally-built rear isometric view.
Fig. 3 is front view.
Fig. 4 is the left view on Fig. 3 along AA cutting.
Fig. 5 is the rearview on Fig. 4 along BB cutting.
Fig. 6 is the partial enlarged drawing that Fig. 5 moves a little.
Fig. 7 is the rearview on Fig. 4 along CC cutting.
Fig. 8 is the oblique sectional view on Fig. 3 along DD cutting.
Fig. 9 is the partial sectional view on Fig. 8 along EE cutting.
Figure 10 is the embodiment of horizontal line projection.
Figure 11 is the embodiment of frontal line projection.
Figure 12 is the embodiment of profile line projection.
Figure 13 is the embodiment of plumb line projection.
Figure 14 is the embodiment of vertical frontal line projection.
Figure 15 is the embodiment of vertical profile line projection.
null1. projection plate in figure，2. go up pan carriage，3. left dynamic spot projection line，4. change gear axle，5. left frame，6. dynamic some front projection cap，7. straight line front projection，8. fixed point front projection cap，9. on, pinpoint projection join line，10.Z axle，Dynamic spot projection line on 11.，12. chutes，13. right fixed point projection join line，14. fixed point side projection caps，15. straight line side projections，16. scales，17. dynamic some side projection caps，18.Yw axle,19. rope supports,20. rope support screws，21. jiaos of separated times，22.YH axle，23. times fixed point projection join line，24.X axle，25. left fixed point projection join line，26. point level projection hats，27. straight horizontal projections，28. dynamic some floor projection caps，29. pulley spindles，30. pulleys，31. dynamic some wind springs，32. projection fixture blocks，33. flexible strand，34. change gears，35. dynamic some shells，36. slide blocks，37. locating slots，38. pins，39. fixed point grooves，40. fixed point axles，41. fixed point wind springs，42. fixed point bearings，43. fixed point openings.
Detailed description of the invention
Fig. 1 to Fig. 5 and Fig. 7, represents the unitary construction composition of the present invention and the connection of parts and position relationship, is also the embodiment of parallax.
Fig. 6 represents dynamic some contexture and the connection of parts and position relationship.
Fig. 8 represents mechanism of linear projection contexture and the connection of parts and position relationship.
Fig. 9 represents place construction composition and the connection of parts and position relationship.
In Fig. 1 to Fig. 9, the straight line three-plane projection demonstration board of flexible drawing includes projection plate 1, projection join line mechanism, mechanism of linear projection.
The straight line three-plane projection demonstration board of flexible drawing includes projection plate 1, projection join line mechanism, mechanism of linear projection.
Projection plate 1 is provided with X-axis 24, YH axle 22, Yw axle 18 and Z axis 10, and X-axis 24, YH axle 22, Yw axle 18 and 10 projection plates 1 of Z axis are divided into frontal plane of projection, horizontal plane, lateral projection face and YHYw face.YHYw face is provided with angle separated time 21.If the end points of straightway is fixed point and dynamic point.Fixed point is motionless point, and the frontal plane of projection of fixed point, floor projection and side projection are located at the centre on respective perspective plane, and the frontal plane of projection of fixed point, floor projection and side projection are respectively equipped with fixed point groove 39, and fixed point groove 39 is ladder circular hole.The frontal plane of projection of fixed point and the line vertical X axis 24 of floor projection, be set to left fixed point projection join line 25；The frontal plane of projection of fixed point and the line vertical Z axle 10 of side projection, be set to upper fixed point projection join line 9；The floor projection of fixed point is to the distance of X-axis 24 equal to the side projection pinpointed to the distance of Z axis 10, and the line of the floor projection of fixed point to angle separated time 21 is set to lower fixed point projection join line 23, and the line of the side projection of fixed point to angle separated time 21 is set to right fixed point projection join line 13.The truncation surface of X-axis 24, YH axle 22, Yw axle 18, Z axis 10, left fixed point projection join line 25, right fixed point projection join line 13, upper fixed point projection join line 9, lower fixed point projection join line 23 and angle separated time 21 is rectangular channel.
Projection join line mechanism includes pan carriage, change gear 34, change gear axle 4, pulley 30, pulley spindle 29, flexible strand 33, rope support 19 and rope support screw 20.Pan carriage has two, is upper pan carriage 2 and left frame 5 respectively.The lower semisection of half section of the right side of upper pan carriage 2 and left frame 5 is provided with scale 16 and numerical value, with this with reference to side projection and the position of side projection.Pan carriage is c-type strip structure, and pan carriage two ends are hooked on projection plate 1.Pan carriage is provided with bar shaped locating slot 37, and locating slot 37 has chute 12, and chute 12 is narrower than locating slot 37.Left frame 5 upper end is provided with change gear axle 4, and change gear axle 4 is cased with change gear 34, and change gear 34 rides over projection plate 1 upper end.After projection plate 1, all pan carriage are respectively arranged at two ends with pulley spindle 29, pulley 30 it is cased with on pulley spindle 29, pulley 30 is provided with two slideways, each slideway is respectively wound with a flexible strand 33, flexible strand 33 has four, and each pulley 30 is wound with two flexible strand 33, and the two ends of every flexible strand 33 are separately fixed on the rope support 19 of projection plate 1 two sides.Rope support 19 has eight, and rope support 19 is fixed on the angle of 1 four sides of projection plate by rope support screw 20 symmetry.Every flexible strand 33 walks around pulley 30 rear steering another pulley 30 to same pan carriage, turns again to be connected with rope support 19, becomes the Z-shaped shape of Z or anti-；Fixing and the trend of another flexible strand 33 corresponding thereto is symmetrical with previous bar flexible strand 33, and two flexible strand 33 are contrary with the winding direction of same pulley 30；To guarantee that pan carriage can translational motion on projection plate 1.
nullMechanism of linear projection includes fixed point、Dynamic point and projection join line，Fixed point includes pinpointing front projection、Point level projection and fixed point side projection，Each projection is by pinpointing bearing 42、Fixed point cap、Fixed point axle 40、Fixed point wind spring 41 and linear projection's composition，Fixed point bearing 42 is installed in the fixed point groove 39 on perspective plane，It is cased with pinpointing cap outside the inner ring of fixed point bearing 42，Fixed point cap is provided with fixed point opening 43，Fixed point cap divides fixed point front projection cap 8、Point level projection hat 26 and fixed point side projection cap 14，Fixed point bearing 42 inner ring is installed with fixed point axle 40，Fixed point wind spring 41 is installed on fixed point axle 40，The inner of fixed point wind spring 41 is connected with fixed point axle 40，The outer end of fixed point wind spring 41 is connected with linear projection，Linear projection is flexible thin strip，It is divided into straight line front projection 7、Straight horizontal projection 27 and straight line side projection 15，Linear projection is wrapped on fixed point wind spring 41，Linear projection is reached on projection plate 1 by fixed point opening 43，It is connected with dynamic.Linear projection is the most exceptionally straight on projection plate 1 under the pulling of fixed point wind spring 41, and length is variable.Dynamic point includes the front projection of dynamic point, dynamic some floor projection and dynamic some side projection, and each projection is made up of slide block 36, projection fixture block 32, pin 38, dynamic some shell 35, dynamic some wind spring 31, dynamic spot projection line and dynamic some cap.Slide block 36 is the assembly of cuboid and cylinder, cylindrical hole is had in the cylinder of slide block 36, two projection fixture blocks 32 it are provided with in through hole, projection fixture block 32 is half stepped cylindrical shape, linear projection is clamped in contact surface between two projection fixture blocks 32, two projection fixture blocks 32 are connected into stepped cylindrical by pin 38, and projection fixture block 32 can rotate in the cylindrical hole of slide block 36；The cuboid of slide block 36 puts into the locating slot 37 of pan carriage, and slide block 36 can slide in locating slot 37；The chute 12 of pan carriage put into by cylinder on slide block 36.The cylindrical outer side of the slide block 36 of front projection connects the inner having two dynamic some wind springs 31 arranged side by side, two dynamic some wind spring 31 outer ends of dynamic some front projection connect left dynamic spot projection line 3 and upper dynamic spot projection line 11 respectively, the cylindrical outer side of the slide block 36 of dynamic some floor projection and side projection connects the inner having a dynamic some wind spring 31, connect the dynamic spot projection line 3 in a left side outside dynamic some wind spring 31 of floor projection, outside the wind spring of side projection, connect upper dynamic spot projection line 11.The truncation surface of dynamic some wind spring 31 is circular.The outside of three projections of dynamic point is cased with dynamic some shell 35, and dynamic some shell 35 is provided with circular hole, and dynamic spot projection line is by circular hole to another dynamic spot projection, and dynamic spot projection line is under the pulling of dynamic some wind spring 31, the most exceptionally straight on projection plate 1, and length is variable.Dynamic some cap is divided into dynamic some front projection cap 6, dynamic some floor projection cap 28 and dynamic some side projection cap 17, and dynamic some cap is tightened on the screw of slide block 36 cylinder by screw thread, is fixed by dynamic spot projection locked on movable stand.
Perspective plane uses white, projection join line and font to use black, and pan carriage uses transparent material, dynamic point and fixed point to use redness, and linear projection uses eye-catching color.
During the demonstration present invention, with hand-screw aeration orifice front projection cap 6, dynamic some floor projection cap 28 and dynamic some side projection cap 17, the front projection of mobile dynamic point postpones to specific bit and screws dynamic some front projection cap 6, to lock the position of straight line front projection 7；Mobile dynamic some floor projection postpones to specific bit and screws dynamic some floor projection cap 28, the position of locking straight horizontal projection 27 again；Read dynamic some floor projection scale value on left frame 5, the corresponding scale value position of mobile dynamic some side projection to upper pan carriage 2 again, then screw dynamic some side projection cap 17.When dynamic spot projection overlaps with fixed point projection, fixed point projection hat can be extracted, to avoid fixed point and the interference of dynamic point.The various positions that can demonstrate straight line are operated with this.
Figure 10 is the embodiment of horizontal line projection.
Figure 11 is the embodiment of frontal line projection.
Figure 12 is the embodiment of profile line projection.
Figure 13 is the embodiment of plumb line projection.
Figure 14 is the embodiment of vertical frontal line projection.
Figure 15 is the embodiment of vertical profile line projection.
Claims (1)
1. the straight line three-plane projection demonstration board of a flexible drawing, including projection plate, projection join line mechanism, mechanism of linear projection, it is characterized in that: projection plate is provided with X-axis, YH axle, Yw axle and Z axis, X-axis, YH axle, Yw axle and Z axis are divided into frontal plane of projection, horizontal plane, lateral projection face and YHYw face projection plate；YHYw face is provided with angle separated time；If the end points of straightway is fixed point and dynamic point；Fixed point is motionless point, and the frontal plane of projection of fixed point, floor projection and side projection are located at the centre on respective perspective plane, and the frontal plane of projection of fixed point, floor projection and side projection are respectively equipped with fixed point groove, and fixed point groove is ladder circular hole；The frontal plane of projection of fixed point and the line vertical X axis of floor projection, be set to left fixed point projection join line；The frontal plane of projection of fixed point and the line vertical Z axle of side projection, be set to upper fixed point projection join line；The floor projection of fixed point is to the distance of X-axis equal to the side projection pinpointed to the distance of Z axis, and the line of the floor projection of fixed point to angle separated time is set to lower fixed point projection join line, and the line of the side projection of fixed point to angle separated time slideway is set to right fixed point projection join line；The truncation surface of X-axis, YH axle, Yw axle, Z axis, left fixed point projection join line, right fixed point projection join line, upper fixed point projection join line, lower fixed point projection join line and angle separated time is rectangular channel；Projection join line mechanism includes pan carriage, change gear, change gear axle, pulley, pulley spindle, flexible strand, rope support and rope support screw；Pan carriage has two, is upper pan carriage and left frame respectively；The lower semisection of half section of the right side of upper pan carriage and left frame is provided with scale and numerical value, with the projection of this reference level and the position of side projection；Pan carriage is c-type strip structure, and pan carriage two ends are hooked on projection plate；Pan carriage is provided with bar shaped locating slot, and locating slot has chute, and chute is narrower than locating slot；Left frame upper end is provided with change gear axle, and change gear axle is cased with change gear, and change gear rides over projection plate upper end；After projection plate, all pan carriage are respectively arranged at two ends with pulley spindle, pulley it is cased with on pulley spindle, pulley is provided with two slideways, each slideway is respectively wound with a flexible strand, flexible strand has four, and each pulley is wound with two flexible strand, and the two ends of every flexible strand are separately fixed on the rope support of projection plate two sides；Rope support has eight, and rope support is fixed on the angle of four sides of projection plate by rope support screw symmetry；Every flexible strand walks around pulley rear steering another pulley to same pan carriage, turns again to be connected with rope support, becomes the Z-shaped shape of Z or anti-；Fixing and the trend of another flexible strand corresponding thereto is symmetrical with previous bar flexible strand, and two flexible strand are contrary with the winding direction of same pulley；To guarantee that pan carriage can translational motion on projection plate；nullMechanism of linear projection includes fixed point、Dynamic point and projection join line，Fixed point includes pinpointing front projection、Point level projection and fixed point side projection，Each projection is by pinpointing bearing、Fixed point cap、Fixed point axle、Fixed point wind spring and linear projection's composition，In fixed point groove on perspective plane, fixed point bearing is installed，It is cased with pinpointing cap outside the inner ring of fixed point bearing，Fixed point cap is provided with fixed point opening，Fixed point cap divides fixed point front projection cap、Point level projection hat and fixed point side projection cap，Fixed point bearing inner race is installed with fixed point axle，On fixed point axle, fixed point wind spring is installed，The inner of fixed point wind spring is connected with fixed point axle，The outer end of fixed point wind spring is connected with linear projection，Linear projection is flexible thin strip，It is divided into straight line front projection、Straight horizontal projection and straight line side projection，Linear projection is wrapped on fixed point wind spring，Linear projection is reached on projection plate by fixed point opening，It is connected with dynamic；Linear projection is the most exceptionally straight on projection plate under the pulling of fixed point wind spring, and length is variable；Dynamic point includes the front projection of dynamic point, dynamic some floor projection and a dynamic some side projection, each projection by slide block, projection fixture block, sell, a dynamic some shell, a dynamic some wind spring, dynamic spot projection line and a dynamic some cap form；Slide block is the assembly of cuboid and cylinder, cylindrical hole is had in the cylinder of slide block, two projection fixture blocks it are provided with in through hole, projection fixture block is half stepped cylindrical shape, linear projection is clamped in contact surface between two projection fixture blocks, two projection fixture blocks are connected into stepped cylindrical by pin, and projection fixture block can rotate in the cylindrical hole of slide block；The cuboid of slide block puts into the locating slot of pan carriage, and slide block can slide in locating slot；The chute of pan carriage put into by cylinder on slide block；The cylindrical outer side of the slide block of front projection connects the inner having two dynamic some wind springs arranged side by side, two dynamic some wind spring outer ends of dynamic some front projection connect left dynamic spot projection line and upper dynamic spot projection line respectively, the cylindrical outer side of the slide block of dynamic some floor projection and side projection connects the inner having a dynamic some wind spring, connect the dynamic spot projection line in a left side outside dynamic some wind spring of floor projection, outside the wind spring of side projection, connect upper dynamic spot projection line；The truncation surface of dynamic some wind spring is circular；The outside of three projections of dynamic point is cased with dynamic some shell, and dynamic some shell is provided with circular hole, and dynamic spot projection line is by circular hole to another dynamic spot projection, and dynamic spot projection line is under the pulling of dynamic some wind spring, the most exceptionally straight on projection plate, and length is variable；Dynamic some cap is divided into dynamic some front projection cap, dynamic some floor projection cap and dynamic some side projection cap, and dynamic some cap is tightened on the screw of slide block cylinder by screw thread, is fixed by dynamic spot projection locked on movable stand；Perspective plane uses white, projection join line and font to use black, and pan carriage uses transparent material, dynamic point and fixed point to use redness, and linear projection uses eye-catching color.
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| CN201610399321.2A CN105825765B (en) | 2016-06-08 | 2016-06-08 | The straight line three-plane projection demonstration board of flexible drawing |
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| CN201610399321.2A CN105825765B (en) | 2016-06-08 | 2016-06-08 | The straight line three-plane projection demonstration board of flexible drawing |
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