CN109979253A - A kind of linear projection's demonstrator - Google Patents
A kind of linear projection's demonstrator Download PDFInfo
- Publication number
- CN109979253A CN109979253A CN201910255633.XA CN201910255633A CN109979253A CN 109979253 A CN109979253 A CN 109979253A CN 201910255633 A CN201910255633 A CN 201910255633A CN 109979253 A CN109979253 A CN 109979253A
- Authority
- CN
- China
- Prior art keywords
- semicircular ring
- frame
- positive
- horizontal plane
- space line
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000000463 material Substances 0.000 claims abstract description 8
- 239000002184 metal Substances 0.000 claims abstract description 5
- 229920005439 Perspex® Polymers 0.000 claims description 4
- 239000004926 polymethyl methacrylate Substances 0.000 claims description 4
- 238000009434 installation Methods 0.000 claims description 3
- 238000003032 molecular docking Methods 0.000 claims description 2
- 239000002023 wood Substances 0.000 abstract 2
- 238000000034 method Methods 0.000 description 4
- 241001633942 Dais Species 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000011521 glass Substances 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- 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
- G09B5/00—Electrically-operated educational appliances
- G09B5/02—Electrically-operated educational appliances with visual presentation of the material to be studied, e.g. using film strip
Landscapes
- Engineering & Computer Science (AREA)
- Business, Economics & Management (AREA)
- Physics & Mathematics (AREA)
- Educational Administration (AREA)
- Educational Technology (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Instructional Devices (AREA)
Abstract
The invention discloses a kind of linear projection's demonstrators, including positive (1), horizontal plane (2), lower fulcrum bar (3), upper rack posts (4), semicircular ring (5), space line (6), lock (7), handle (8), frame (9)；Positive (1) is that rectangular flat plate is made with wood materials, the surface painted white of positive (1), alphabetical V is indicated above, rectangular flat plate is made with wood materials in horizontal plane (2), the side of horizontal plane (2) is connect with the bottom of frame (9), semicircular ring (5) is made of thin metal rod, two endpoints of semicircular ring with it is hinged at the upper end-face edge of positive (1), semicircular ring (5) can rotate on positive (1)；Frame (9) lower end middle hinge-connection space line (6), the upper end cap of space line (6) is on semicircular ring (5), cooperate projection source, the projection property of presentation space straight line solves and lacks demonstration instrument in teaching to teaching bring difficulty.
Description
Technical field
The present invention relates to a kind of teaching demonstration device more particularly to a kind of linear projection's demonstrators.
Background technique
In resonable engineering and polytechnic universities, " Descriptive Geometry & Mechanical Graphing " are all the Mechanical Fundamentals classes that must be opened, and in teaching, are being talked about
When the projection of space line, straight line is different to the various relative positions on perspective plane, and the projection of straight line has different projection properties,
Such as the projection property of perspective plane parallel lines are as follows: very long, it and the axis of projection of projection reflection straight line on parallel perspective plane
Angle, reflect straight line to the actual size at other two perspective plane inclination angle respectively.Freshman due to spatial imagination not yet
It is developed, in three perspective plane systems, can not imagine why only have projection line parallel lines that straight line could be reflected to other two
Why not the actual size at a perspective plane inclination angle, common place planc can reflect straight line to the true of other two perspective plane inclination angle
Real size, teacher is also difficult to demonstrate by explanation of drawing, or even has many students until graduation, also therein without grasping
Geometrical principle seriously affects teaching efficiency.
Summary of the invention
The purpose of the present invention is overcoming the shortcoming in background technique, it is simple to provide a kind of structure, easy to operate, can be direct
Linear projection's demonstrator of presentation space linear projection characteristic.
The purpose of the present invention is what is be achieved through the following technical solutions:
Linear projection's demonstrator of the invention, as shown in Figure 1, including front 1, horizontal plane 2, lower fulcrum bar 3, upper rack posts 4, half
Annulus 5, space line 6, lock 7, handle 8, frame 9, bulb 10, thin bar 11, projector 12.
The front 1 is that rectangular flat plate is made with clear perspex material, indicates alphabetical V on front 1, just
The periphery in face 1 surrounds rectangular border 9 with transparent organic glass material, and front 1 forms rectangular slot with frame 9, and the depth of slot is
1-2 centimetres, positive 1 bottom edge draws a horizontal line, and marking-up mother O, left side marking-up mother X on the right side of horizontal line form OX axis.
Rectangular flat plate is made with transparent plane glass material in the horizontal plane 2, the side of horizontal plane 2 with frame 9
Bottom connection, horizontal plane 2 can be rotated around the bottom of frame 9, and alphabetical H is indicated on horizontal plane 2.
The semicircular ring 5 is made of thin metal rod, two endpoints of semicircular ring 5 with it is hinged at the upper end-face edge in front 1,
Semicircular ring 5 can rotate upwardly and downwardly in the plane in front 1.
The upper end of the 9 lower end middle hinge-connection space line 6 of frame, space line 6 is semicircular ring hook, is covered
In semicircular ring 5, space line 6 is indicated with BA, lower end B point be located at 9 lower end middle hinge of frame connect place position it is constant, upper end A point
It can slide in semicircular ring 5 and be rotated along semicircular ring 5.It is empty when at the right end that the end A of space line 6 is located at semicircular ring 5
Between straight line BA be parallel to plane 1, and straight line BA is drawn in plane 1 at this position, and mark the angle of straight line BA and OX axis
The actual size of α, α, that is, representation space straight line 6 and 2 inclination angle of horizontal plane
The lower end frame of the frame 9 is two parts composition, hollow ball-shape is made at intermediate docking, and be embedded in bulb 10,
10 upper end of bulb has thin quarter butt 11, and bulb 10 can be freely rotated in hollow sphere；Space line 6 of light-weight metal by being made
Rod piece, be formed with circular hole at the axle center of lower end, circular hole is sleeved in the thin bar 11 of bulb 10, and can be slided up and down along thin bar.
The space line 6 can also be taken off from semicircular ring 5 and hinge point and freely place.
Lower fulcrum bar 3 and upper rack posts 4 are hinged in the left frame of the frame 9, in projector presentation by front 1
And horizontal plane 2 is fixed；
9 upper outside of the frame installation lock 7 and handle 8.
The projector 12 selects Toshiba TLP-T61M projector, using computer common in teaching and office and throws
Shadow instrument system can be delivered directly as projection source, Toshiba's TLP-T61M projector its main feature is that ultra high-definition with daytime, best projection away from
From about 4.5 meters.
When lecture experiment, projector 12 is placed in the side at dais 13, is placed in the other side apart from about 2 meters of projector straight
Line projection's instrument ontology 14 places screen 15 behind linear projection's instrument ontology 14 at 2.5 meters, and makes front 1 and screen 15
Plane it is parallel.
As seen from the above technical solution provided by the invention, the beneficial effect of linear projection's demonstrator of the present invention
Fruit is to provide a kind of new teaching instrument, can direct clearly presentation space linear projection characteristic, compensate in this teaching
Hold the blank of not instruments used for education, teaching efficiency significantly improves, and structure is simple, low manufacture cost, easy to use.
Detailed description of the invention
Fig. 1 is a kind of linear projection's demonstrator structure schematic diagram of the present invention.
Fig. 2 is a kind of linear projection's demonstrator space line of the present invention and frame connection relationship diagram.
Fig. 3 is a kind of linear projection's demonstrator practical application arrangement schematic diagram of the present invention.
Fig. 4 is a kind of perspective view of linear projection's demonstrator of the present invention on the screen.
In figure: 1, positive, 2, horizontal plane, 3, lower fulcrum bar, 4, upper rack posts, 5, semicircular ring, 6, space line, 7, lock, 8,
Handle, 9, frame, 10, bulb, 11, thin bar, 12, projector, 13, dais, 14, linear projection's instrument ontology, 15, screen.
Specific embodiment
With reference to the attached drawing in the embodiment of the present invention, technical solution in the embodiment of the present invention carries out clear, complete
Ground description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Based on this
The embodiment of invention, every other implementation obtained by those of ordinary skill in the art without making creative efforts
Example, belongs to protection scope of the present invention.
The embodiment of the present invention is described in further detail below in conjunction with attached drawing.
In use, first opening horizontal plane 2, horizontal plane 2 is propped up into fixation with lower fulcrum bar 3, horizontal plane 2 and front 1 are hung down
Directly, semicircular ring 5 is propped up with upper rack posts 4, the plane of semicircular ring 5 is also vertical with front 1, i.e., the plane of semicircular ring 5 is in level
Position.Projector 12 is placed in the side at dais 13, places linear projection's instrument ontology in the other side apart from about 2 meters of projector
14, screen 15 is placed behind linear projection's instrument ontology 14 at 2.5 meters, is paid attention to so that positive 1 is parallel with the plane of screen 15.
Projector connects computer, opens power supply and adjusts projector outgoing beam, so that the light beam position that projector projects
In the centre of screen 15；Then a blank page in Microsoft PowerPoint is opened, there will be beam of white light to pass through straight
Line projection's instrument ontology 14 projects on screen 15, linear projection's instrument ontology 14 is adjusted at a distance from screen 15, so that linear projection
The frame 9 of instrument ontology 14 is amplified to except screen 15, and every content on front 1 is only seen on screen 15.In short transverse
On, the center of 12 projecting beam of projector and semicircular ring 5 is contour, then semicircular ring 5 projects on screen 15 as straight line.
The presentation process of linear projection's instrument is as follows:
(1) at the left end that the end A of straight line is located at semicircular ring 5 when, space line 6 is parallel to front 1, as perspective plane
Parallel lines, then space line 6 reflects the very long of space line 6, the angle of front projection and axis of projection OX in positive projection BA
Reflect space line to the actual size α at 2 inclination angle of horizontal plane, it can be seen that the actual size of α on screen 15.
(2) end A of space line 6 along 5 forward slip of semicircular ring to the position of A ' when, space line 6 is general position
Straight line, space line 6 and horizontal plane H angle α are constant at this time, but its front projection BA ' does not reflect the very long of space line, front
The angle α of projection BA ' and OX axis ' space line 6 cannot be reflected to the actual size of horizontal plane H angle；It can be with from screen 15
See that α ' is greater than α, and as the end A of space line 6 is along 5 forward slip of semicircular ring, α ' can increase to 90 degree.
It can clearly obtain herein, in three perspective plane systems, only projection line parallel lines are on the perspective plane that reaction is really grown
On projection, could reflect space line to the actual size at other two perspective plane inclination angle, common place planc is cannot be anti-
Straight line is reflected to the actual size at other two perspective plane inclination angle.
(3) space line 6 is taken off from projection demonstrator, makes it perpendicular to front 1, it is vertical that perspective plane can be obtained
The projection accumulation of line is a bit.
In the above presentation process, when illustrating space line and being in three kinds of different locations to perspective plane, the throwing of space line
Shadow characteristic solves and lacks demonstration instrument in teaching to teaching bring difficulty.Student is apparent that in linear projection's instrument
Situation of change of the space line 6 relative to the position in front 1, while it can be clearly seen that the throwing of space line 6 on the screen
Shadow and its situation of change of projection and OX axle clamp angle,
Linear projection's demonstrator is removed from front 1 and 2 fixed point of horizontal plane after use, by lower fulcrum bar 3, upper rack posts 4
Come, and be put into frame 9, semicircular ring 5 is also put down and hung on front 1 at this time, and horizontal plane 2 is flipped up and is lockked with lock 7, is led to
Crossing handle can easily carry.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
In the technical scope disclosed by the present invention, any changes or substitutions that can be easily thought of by anyone skilled in the art,
It should be covered by the protection scope of the present invention.Therefore, protection scope of the present invention should be with the protection model of claims
Subject to enclosing.
Claims (6)
1. a kind of linear projection's demonstrator, which is characterized in that including positive (1), horizontal plane (2), lower fulcrum bar (3), upper rack posts
(4), semicircular ring (5), space line (6), lock (7), handle (8), frame (9)；
The front (1) is that rectangular flat plate is made with clear perspex material, and alphabetical V, positive (1) are indicated above
Periphery surrounded rectangular border (9) with clear perspex material, positive (1) and frame (9) forms rectangle trogue, slot
Depth be 1-2 centimetres, positive (1) bottom edge draws a horizontal line, and marking-up mother O, left side marking-up mother X on the right side of horizontal line are formed
OX axis；
Rectangular flat plate, the side of horizontal plane (2) and and frame is made with clear perspex material in the horizontal plane (2)
(9) bottom connection, horizontal plane (2) can be rotated around the bottom of frame (9), and horizontal plane indicates alphabetical H on (2)；
The semicircular ring (5) is made of thin metal rod, two endpoints of semicircular ring with it is hinged at the upper end-face edge of positive (1),
Semicircular ring (5) can be rotated upwardly and downwardly in the junction of positive (1)；
Described frame (9) the lower end middle hinge-connection space line (6), the upper end of space line (6) are semicircular ring hook, set
On semicircular ring (5), space line (6) is indicated with AB, B point be located at frame (9) lower end middle hinge connect place position it is constant, A point
It can slide on semicircular ring (5) and be rotated along semicircular ring (5)；When the end A of space line (6) is located at the most right of semicircular ring (5)
When at end, space line AB is parallel to positive (1), and draws straight line AB on positive (1) at this position, and mark straight line AB
With the angle α of OX axis '.
2. a kind of linear projection's demonstrator according to claim 1, which is characterized in that frame (9) lower end frame is
Two parts form, and hollow ball-shape are made at intermediate docking, and be embedded in bulb (10), and bulb (10) upper end has thin bar (11), ball
Head (10) can be freely rotated in hollow sphere.
3. a kind of linear projection's demonstrator according to claim 1, which is characterized in that the space line (6) is to use
Rod piece made of light-weight metal, lower end axle center are formed with circular hole, and circular hole is sleeved in the small thin bar (11) on bulb (10), and can
To be slided up and down along thin bar.
4. a kind of linear projection's demonstrator according to claim 1, which is characterized in that the space line (6) also may be used
To be taken off and hand-held from semicircular ring (5) and hinge point.
5. a kind of linear projection's demonstrator according to claim 1, which is characterized in that the frame (9)
Lower fulcrum bar (3) and upper rack posts (4) are hinged inside left side, it can be vertically fixed by positive (1) and horizontal plane (2).
6. a kind of linear projection's demonstrator according to claim 1, which is characterized in that on the frame (9)
Installation installation lock (7) and handle (8) on the outside of portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910255633.XA CN109979253A (en) | 2019-03-22 | 2019-03-22 | A kind of linear projection's demonstrator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910255633.XA CN109979253A (en) | 2019-03-22 | 2019-03-22 | A kind of linear projection's demonstrator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109979253A true CN109979253A (en) | 2019-07-05 |
Family
ID=67082039
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910255633.XA Pending CN109979253A (en) | 2019-03-22 | 2019-03-22 | A kind of linear projection's demonstrator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109979253A (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2083776U (en) * | 1990-12-06 | 1991-08-28 | 马力 | Geometry theorem composite teaching-aid box |
| CN2651872Y (en) * | 2003-08-15 | 2004-10-27 | 南京师范大学 | Light reflective demonstrating device |
| CN104670303A (en) * | 2013-11-29 | 2015-06-03 | 刘海鹏 | Multi-wheel vehicle mechanical universal steering control mechanism and boosting mode and auxiliary method thereof |
| CN204884314U (en) * | 2015-07-09 | 2015-12-16 | 黎国之 | Card formula solid geometry teaching aid |
| CN105607633A (en) * | 2015-12-18 | 2016-05-25 | 中国印钞造币总公司 | Autonomous path searching method and system for mobile scanning vehicle in piling region environment |
| CN105931534A (en) * | 2016-06-16 | 2016-09-07 | 沈阳工业大学 | Flexible traction line tube stretching-type linkage linear three-face projection demonstration board |
| CN106781968A (en) * | 2016-12-11 | 2017-05-31 | 沈阳工业大学 | The straight line three-plane projection demonstration board of carrying space model scale positioning |
| CN107079140A (en) * | 2014-07-15 | 2017-08-18 | 挪佛麦迪哥股份公司 | Method for three-dimensional scenic to be presented on automatic stereo monitor |
| US20180201050A1 (en) * | 2018-02-06 | 2018-07-19 | Ronald Harvey Rosenfield | Angle trisector, as validated to perform accurately over a wide range of device settings by a novel geometric forming process; also capable of portraying finite lengths that only could be approximated by means of otherwise applying a compass and straightedge to a given length of unity; that furthermore functions as a level whose inherent geometry could be adapted for many other uses such as being incorporated into the design of a hydraulic car lift |
| CN209962433U (en) * | 2019-03-22 | 2020-01-17 | 湖州师范学院 | Linear projection demonstration instrument |
-
2019
- 2019-03-22 CN CN201910255633.XA patent/CN109979253A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2083776U (en) * | 1990-12-06 | 1991-08-28 | 马力 | Geometry theorem composite teaching-aid box |
| CN2651872Y (en) * | 2003-08-15 | 2004-10-27 | 南京师范大学 | Light reflective demonstrating device |
| CN104670303A (en) * | 2013-11-29 | 2015-06-03 | 刘海鹏 | Multi-wheel vehicle mechanical universal steering control mechanism and boosting mode and auxiliary method thereof |
| CN107079140A (en) * | 2014-07-15 | 2017-08-18 | 挪佛麦迪哥股份公司 | Method for three-dimensional scenic to be presented on automatic stereo monitor |
| CN204884314U (en) * | 2015-07-09 | 2015-12-16 | 黎国之 | Card formula solid geometry teaching aid |
| CN105607633A (en) * | 2015-12-18 | 2016-05-25 | 中国印钞造币总公司 | Autonomous path searching method and system for mobile scanning vehicle in piling region environment |
| CN105931534A (en) * | 2016-06-16 | 2016-09-07 | 沈阳工业大学 | Flexible traction line tube stretching-type linkage linear three-face projection demonstration board |
| CN106781968A (en) * | 2016-12-11 | 2017-05-31 | 沈阳工业大学 | The straight line three-plane projection demonstration board of carrying space model scale positioning |
| US20180201050A1 (en) * | 2018-02-06 | 2018-07-19 | Ronald Harvey Rosenfield | Angle trisector, as validated to perform accurately over a wide range of device settings by a novel geometric forming process; also capable of portraying finite lengths that only could be approximated by means of otherwise applying a compass and straightedge to a given length of unity; that furthermore functions as a level whose inherent geometry could be adapted for many other uses such as being incorporated into the design of a hydraulic car lift |
| CN209962433U (en) * | 2019-03-22 | 2020-01-17 | 湖州师范学院 | Linear projection demonstration instrument |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN205125463U (en) | Novel electronic commerce teaching platform | |
| CN206826258U (en) | A kind of bilateral English teaching learning board | |
| CN209607211U (en) | A kind of primary school teacher's rotating disc type Teaching aid for learning characters | |
| CN103544873A (en) | Optical fiber communication principle demonstration instrument | |
| CN109979253A (en) | A kind of linear projection's demonstrator | |
| CN206480238U (en) | A kind of Teaching of Economics showing stand | |
| CN209962433U (en) | Linear projection demonstration instrument | |
| CN210535070U (en) | Ideological and political theory teaching is with annular display device | |
| CN204599778U (en) | There is the copyboard of grid location function | |
| CN207765035U (en) | The refraction apparatus for demonstrating of magnetic-type light | |
| CN106710373A (en) | Display stand for two-side teaching | |
| CN110047354A (en) | A kind of linear projection's demenstration method | |
| CN106530844A (en) | Chinese language and literature teaching board | |
| CN203692860U (en) | Multimedia teaching desk with lecture reflection prompting device | |
| CN212889604U (en) | Portable teaching board for education and teaching | |
| CN203986825U (en) | A kind of electronic desk | |
| CN205943143U (en) | Novel interactive teaching system | |
| CN106652667A (en) | Teaching display platform | |
| CN208861487U (en) | One kind is for interaction device during college English Teaching | |
| CN209118594U (en) | A kind of multifunctional optical experimental demonstration device | |
| CN208045040U (en) | A kind of ideological and political education multi-angle publicity board | |
| CN207637320U (en) | A kind of teaching of Chinese apparatus for demonstrating | |
| CN206236320U (en) | A kind of Portable English word learning device | |
| CN211928772U (en) | Teaching aid for point-line-surface three-view projection demonstration | |
| CN1716340A (en) | Double sine line bar rod full function triangular function and plane geometry demonstrator |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |