CN110570713B - Three-view simulation device - Google Patents
Three-view simulation device Download PDFInfo
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- CN110570713B CN110570713B CN201910865079.7A CN201910865079A CN110570713B CN 110570713 B CN110570713 B CN 110570713B CN 201910865079 A CN201910865079 A CN 201910865079A CN 110570713 B CN110570713 B CN 110570713B
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- 238000004088 simulation Methods 0.000 title claims abstract description 97
- 238000005286 illumination Methods 0.000 claims abstract description 61
- 239000000758 substrate Substances 0.000 claims abstract description 59
- 238000003780 insertion Methods 0.000 claims description 6
- 230000037431 insertion Effects 0.000 claims description 6
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 5
- 230000001678 irradiating effect Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
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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
- G09B23/00—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes
- G09B23/02—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for mathematics
- G09B23/04—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for mathematics for geometry, trigonometry, projection or perspective
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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
- G09B9/00—Simulators for teaching or training purposes
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- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Computational Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Mathematical Analysis (AREA)
- Mathematical Optimization (AREA)
- Pure & Applied Mathematics (AREA)
- Business, Economics & Management (AREA)
- Mathematical Physics (AREA)
- Educational Administration (AREA)
- Educational Technology (AREA)
- Algebra (AREA)
- Geometry (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
Abstract
The invention provides a three-view simulation device, which belongs to the technical field of teaching auxiliary devices and comprises a rectangular substrate, a first projection plate, a second projection plate, a first illumination plate, a second illumination plate, a simulation column and a simulation ball. The three-view three-dimensional structure comprises connection points of a plurality of simulation columns and a rectangular substrate, a plurality of projection points projected on a first projection plate through a first illumination plate, and a plurality of projection points projected on a second projection plate through a second illumination plate, wherein the connection points are respectively used for forming three-view nodes of the three-dimensional structure. The three-view simulation device provided by the invention forms three-view shapes with different structures through nodes at different positions, and can be used for directly observing three views of a three-dimensional graph during teaching, so that students can conveniently and visually know the three views.
Description
Technical Field
The invention belongs to the technical field of teaching auxiliary devices, and particularly relates to a three-view simulation device.
Background
In the traditional teaching, the difficulty of learning the solid geometry is high for students who just touch, especially for understanding three views, the students often have difficulty in imagining the shapes of all the views, and for complex solid figures, the understanding is more difficult.
Disclosure of Invention
The invention aims to provide a three-view simulation device, which aims to solve the problem that students have difficulty in understanding three views of a three-dimensional graph.
In order to achieve the purpose, the invention adopts the technical scheme that: there is provided a three-view simulation apparatus including:
a rectangular substrate;
the first projection plate is vertically arranged on the upper end face of the rectangular substrate;
the second projection plate is vertically arranged on the upper end face of the rectangular substrate and is vertically arranged with the first projection plate;
the first illumination plate is vertically arranged on the rectangular substrate and is parallel to the first projection plate, and a first parallel light source is arranged on the end face, close to the first projection plate, of the first illumination plate;
the second illumination plate is vertically arranged on the rectangular substrate and is parallel to the second projection plate, and a second parallel light source is arranged on the end face, close to the second projection plate, of the second illumination plate;
the simulation columns are respectively vertically arranged on the upper end surface of the rectangular substrate and are positioned in a space surrounded by the first projection plate, the second projection plate, the first illumination plate and the second illumination plate; the upper end of the simulation column is provided with a simulation ball, and a plurality of simulation balls are used for forming nodes of a three-dimensional structure;
the connection points of the simulation columns and the rectangular substrate, the projection points projected on the first projection plate through the first illumination plate, and the projection points projected on the second projection plate through the second illumination plate are respectively used for forming three-view nodes of the three-dimensional structure.
As another embodiment of the present application, the three-view simulation apparatus further includes:
and the supporting rods are respectively supported between any two simulation balls and are used for constructing the three-dimensional structure.
As another embodiment of the present application, the support rod includes:
a sleeve;
and the two elastic supporting rods are respectively arranged at two ends of the sleeve in a penetrating way and are used for abutting against the end surface of the simulation ball.
As another embodiment of the present application, a grid line is disposed on the upper end surface of the rectangular substrate, and the lower ends of the plurality of simulation columns are disposed at the intersection of the grid line, respectively.
As another embodiment of the application, a plurality of jacks are arranged on the upper end face of the rectangular substrate, the jacks are located at the intersection points of the grid lines, and the simulation columns are inserted into the rectangular substrate through the jacks.
As another embodiment of the present application, the simulation column includes:
the base column is vertically arranged on the rectangular substrate;
the telescopic link slides and wears to locate on the foundation post for drive is located the telescopic link upper end the analog column lift adjustment.
As another embodiment of the application, the side wall of the telescopic rod is provided with scale marks along the length direction.
As another embodiment of this application, the lower extreme of first illumination board is equipped with first picture peg perpendicularly, the rectangular substrate is close to first slot has been seted up on the lateral wall of first illumination board, first illumination board passes through first picture peg with the grafting cooperation of first slot is located one side of rectangular substrate.
As another embodiment of this application, the lower extreme of second illumination board is equipped with the second picture peg perpendicularly, the rectangular substrate is close to the second slot has been seted up on the lateral wall of second illumination board, the second illumination board passes through the second picture peg with the grafting cooperation of second slot is located one side of rectangular substrate.
The three-view simulation device provided by the invention has the beneficial effects that: compared with the prior art, the three-view simulation device has the advantages that a plurality of simulation columns with different lengths are selected to be vertically arranged on the upper end face of the rectangular substrate, so that a plurality of simulation balls form nodes with different structures, and the nodes of the structure in the first view direction are constructed through a plurality of connection points of the simulation columns and the rectangular substrate; a plurality of projection points are formed on the first projection plate by irradiating a plurality of simulated balls through a first parallel light source on the first illumination plate, so that a node in a second view direction is constructed; and a plurality of projection points are formed on the second projection plate by irradiating the plurality of simulated balls through a second parallel light source on the second illumination plate, so that nodes in a third view direction are constructed, and three-view shapes with different structures are formed through the nodes on the view. The device is applied during teaching, can directly observe three views of three-dimensional figures, and is convenient for students to visually know.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed for the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a three-view simulation apparatus according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a first lighting board and a rectangular substrate of a three-view simulation apparatus according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a simulation column and a rectangular substrate of a three-view simulation apparatus according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a support rod of a three-view simulation apparatus according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a three-view simulation apparatus according to another embodiment of the present invention.
In the figure: 1. a rectangular substrate; 11. a jack; 12. a first slot; 13. a second slot; 2. a first projection plate; 3. a second projection plate; 4. a first illumination plate; 41. a first board insert; 5. a second illumination panel; 51. a second board plug; 6. a simulation column; 601. a foundation column; 602. a telescopic rod; 61. scale lines; 7. simulating a ball; 8. a support bar; 801. a sleeve; 802. an elastic strut; 803. an abutting portion; 9. and (4) end covers.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1 and 2, a three-view simulation apparatus according to the present invention will now be described. The three-view simulation device comprises a rectangular substrate 1, a first projection plate 2, a second projection plate 3, a first illumination plate 4, a second illumination plate 5, a simulation column 6 and a simulation ball 7.
The first projection plate 2 is vertically arranged on the upper end surface of the rectangular substrate 1; the second projection plate 3 is vertically arranged on the upper end surface of the rectangular substrate 1 and is vertically arranged with the first projection plate 2; the first lighting board 4 is vertically arranged on the rectangular substrate 1 and is parallel to the first projection board 2, and a first parallel light source is arranged on the end face, close to the first projection board 2, of the first lighting board 4; the second lighting plate 5 is vertically arranged on the rectangular substrate 1 and is parallel to the second projection plate 3, and a second parallel light source is arranged on the end face, close to the second projection plate 3, of the second lighting plate 5; the simulation columns 6 are respectively vertically arranged on the upper end surface of the rectangular substrate 1 and are positioned in a space enclosed by the first projection plate 2, the second projection plate 3, the first illumination plate 4 and the second illumination plate 5; the upper end of the simulation column 6 is provided with a simulation ball 7, and the simulation balls 7 are used for forming nodes of a three-dimensional structure; the connection points of the simulation columns 6 and the rectangular substrate 1, the projection points projected on the first projection plate 2 through the first illumination plate 4, and the projection points projected on the second projection plate 3 through the second illumination plate 5 are respectively used for forming three-view nodes of a three-dimensional structure.
The rectangular substrate 1, the first projection plate 2 and the second projection plate 3 are integrally formed, and the three plates are perpendicular to each other. The first parallel light source and the second parallel light source can be BT-TCL series telecentric parallel light sources, and are turned on and off by control switches arranged on the back surfaces of the first illumination plate 4 and the second illumination plate 5. The end faces of the first projection plate 2 and the second projection plate 3 opposite to the first illumination plate 4 and the second illumination plate 5 are respectively divided into a plurality of grids, and the grids can facilitate observation of the positions of projection points. The number of the simulation columns 6 is not less than three, and when three simulation columns 6 are adopted, the simulated space structure is positioned on the same plane and is a two-dimensional structure; when more than three simulation columns 6 are adopted, the simulated spatial structure is a three-dimensional structure.
Compared with the prior art, the three-view simulation device provided by the invention has the advantages that a plurality of simulation columns 6 with different lengths are vertically arranged on the upper end surface of the rectangular substrate 1, so that a plurality of simulation balls 7 form nodes with different structures, and the nodes of the structures in the first view direction are constructed through a plurality of connection points of the simulation columns 6 and the rectangular substrate 1; a plurality of projection points are formed on the first projection plate 2 by a plurality of simulated balls 7 illuminated by a first parallel light source on the first illumination plate 4, so that nodes in a second view direction are constructed; a plurality of projection points are formed on the second projection plate 3 by a plurality of simulated balls 7 illuminated by a second parallel light source on the second illumination plate 5, so that nodes in a third view direction are constructed, and three-view shapes with different structures are formed by the nodes on the view. The device is applied during teaching, can directly observe three views of three-dimensional figures, and is convenient for students to visually know.
As an embodiment of the three-view simulation apparatus provided in the present invention, please refer to fig. 1, the three-view simulation apparatus further includes a plurality of support rods 8. The plurality of support rods 8 are respectively supported between any two simulation balls 7, and the plurality of support rods 8 are used for constructing a three-dimensional structure. In this embodiment, a plurality of bracing pieces 8 are used for supporting two arbitrary simulation balls 7, and a plurality of simulation balls 7 pass through the bracing piece 8 and connect the back, form the spatial structure figure, and is more directly perceived, and the student of being convenient for knows the concrete shape of this structure.
Referring to fig. 4, the supporting rod 8 includes a sleeve 801 and an elastic supporting rod 802 as an embodiment of the three-view simulation apparatus according to the present invention. And the two elastic supporting rods 802 are respectively arranged at two ends of the sleeve 801 in a penetrating manner and used for abutting against the end face of the simulation ball 7. In this embodiment, sleeve 801 middle part is equipped with the baffle, and the both sides of baffle are equipped with the spring respectively, and inside sleeve 801 was worn to locate to the spring, and was located the both sides of baffle, and the one end welding of spring or joint are fixed in one side of baffle, and on the other end welded fastening was in elastic support rod 802, the top of two simulation balls 7 of spring compression in order to adapt to different distances leaned on. Elastic support rod 802 is used for supporting one end welding abutting part 803 of simulation ball 7, and abutting part 803 is the arc, and the radian of this arc is the same with the surperficial radian of simulation ball 7, can realize that elastic support rod 802 leans on with the top of two simulation balls 7 different angles, guarantees elastic support rod 802 and simulation ball 7's stability.
Referring to fig. 1, as a specific embodiment of the three-view simulation apparatus provided by the present invention, grid lines are disposed on an upper end surface of a rectangular substrate 1, and lower ends of a plurality of simulation columns 6 are respectively disposed at intersections of the grid lines. In this embodiment, the grid lines are formed by a plurality of mutually perpendicular transverse lines and longitudinal lines, and are used for marking the positions of the intersection points, so that the positions of the simulation columns 6 can be directly determined, and the operation is convenient.
Referring to fig. 1 and 3, as a specific embodiment of the three-view simulation apparatus provided by the present invention, a plurality of insertion holes 11 are disposed on an upper end surface of a rectangular substrate 1, the insertion holes 11 are located at intersections of grid lines, and a simulation column 6 is inserted into the rectangular substrate 1 through the insertion holes 11. In this embodiment, jack 11 is located the nodical department of gridlines, and the lower extreme of simulation post 6 is equipped with the grafting piece, and the grafting piece is pegged graft in jack 11, can conveniently confirm the position of simulation post 6, and can guarantee the stability of simulation post 6. In addition, the jack 11 can be a threaded hole, the inserting block positioned at the lower end of the simulation column 6 is provided with an external thread, and the simulation column 6 can be installed in the jack 11 through the threads, so that the stability of the simulation column 6 can be further improved.
Referring to fig. 3, a simulation column 6 includes a base column 601 and a telescopic rod 602. The base column 601 is vertically arranged on the rectangular substrate 1; the telescopic rod 602 is slidably inserted into the base column 601 for driving the simulation column 6 at the upper end of the telescopic rod 602 to lift and adjust. In this embodiment, the base column 601 is a sleeve 801 structure, the telescopic rod 602 penetrates through the base column 601 from top to bottom, the simulation ball 7 is installed at the upper end of the telescopic rod 602, the telescopic rod 602 and the base column 601 can be in damping fit to realize relative sliding and fixing, the telescopic rod 602 can also be in lifting relative to the base column 601 for thread fit, meanwhile, a positioning pin can also transversely penetrate through the base column 601, and the telescopic rod 602 can slide and be fixed relative to the base column 601 through the pressure of the positioning pin and the side wall of the telescopic rod 602.
Referring to fig. 3, as a specific embodiment of the three-view simulator provided in the present invention, the side wall of the telescopic rod 602 is provided with scale marks 61 along the length direction thereof. In this embodiment, the length of the base column 601 of each simulation column 6 is the same, the length of the whole simulation column 6 is adjusted by adjusting the length of the telescopic rod 602 extending out of the base column 601, and the scale mark 61 facilitates the operator to observe the length of the telescopic rod 602 extending out of the base column 601.
As an embodiment of the three-view simulation apparatus provided by the present invention, please refer to fig. 1 to 3, a first inserting plate 41 is vertically disposed at a lower end of the first illumination plate 4, a first slot 12 is disposed on a side wall of the rectangular substrate 1 close to the first illumination plate 4, and the first illumination plate 4 is disposed at one side of the rectangular substrate 1 through the insertion and connection of the first inserting plate 41 and the first slot 12. In this embodiment, the first inserting plate 41 is inserted into the first slot 12 and can slide along the length direction of the first slot 12, so as to drive the first illuminating plate 4 to slide, and adjust the distance between the first illuminating plate 4 and the simulation column 6, thereby adjusting the definition of the projection point projected on the first projection plate 2.
As a specific embodiment of the three-view simulation apparatus provided by the present invention, please refer to fig. 1 to 3, a second inserting plate 51 is vertically disposed at a lower end of the second lighting board 5, a second slot 13 is disposed on a side wall of the rectangular substrate 1 close to the second lighting board 5, and the second lighting board 5 is disposed at one side of the rectangular substrate 1 through the inserting and fitting of the second inserting plate 51 and the second slot 13. In this embodiment, the second inserting plate 51 is inserted into the second slot 13 and can slide along the length direction of the second slot 13, so as to drive the second illuminating plate 5 to slide, adjust the distance between the second illuminating plate 5 and the simulation column 6, and adjust the definition of the projection point projected on the second projection plate 3.
Referring to fig. 3 and 5, as a specific embodiment of the three-view simulation apparatus provided by the present invention, the first slot 12 is located above the second slot 13 and is partitioned by a transverse partition in the rectangular substrate 1, so that the first illumination plate 4 and the second illumination plate 5 do not interfere with each other when sliding relatively. First illumination board 4 and second illumination board 5 insert respectively through first picture peg 41 and second picture peg 51 in the rectangular substrate 1, form upper end open-ended box structure, can reduce the space of placing of this device, simultaneously can be at the upper portion opening part lock end cover 9 of this box structure, the lower extreme of end cover 9 is equipped with a plurality of locating pins, respectively with first projection board 2, second projection board 3, the spliced eye grafting cooperation that corresponds on first illumination board 4 and the second illumination board 5, make this device form an enclosure space, simulation post 6 and bracing piece 8 can be placed in this enclosure space, convenient storage.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (7)
1. A three-view simulation apparatus, comprising:
a rectangular substrate;
the first projection plate is vertically arranged on the upper end face of the rectangular substrate;
the second projection plate is vertically arranged on the upper end face of the rectangular substrate and is vertically arranged with the first projection plate;
the first illumination plate is vertically arranged on the rectangular substrate and is parallel to the first projection plate, and a first parallel light source is arranged on the end face, close to the first projection plate, of the first illumination plate;
the second illumination plate is vertically arranged on the rectangular substrate and is parallel to the second projection plate, and a second parallel light source is arranged on the end face, close to the second projection plate, of the second illumination plate;
the simulation columns are respectively vertically arranged on the upper end surface of the rectangular substrate and are positioned in a space surrounded by the first projection plate, the second projection plate, the first illumination plate and the second illumination plate; the upper end of the simulation column is provided with a simulation ball, and a plurality of simulation balls are used for forming nodes of a three-dimensional structure;
the connection points of the simulation columns and the rectangular substrate, the projection points projected on the first projection plate through the first illumination plate, and the projection points projected on the second projection plate through the second illumination plate are respectively used for forming three-view nodes of the three-dimensional structure;
a first plug board is vertically arranged at the lower end of the first illumination board, a first slot is formed in the side wall, close to the first illumination board, of the rectangular substrate, and the first illumination board is arranged on one side of the rectangular substrate in a plug-in matching mode through the first plug board and the first slot;
a second plug board is vertically arranged at the lower end of the second illumination board, a second slot is formed in the side wall, close to the second illumination board, of the rectangular substrate, and the second illumination board is arranged on one side of the rectangular substrate in a plug-in matching mode through the second plug board and the second slot;
first slot is located the top of second slot, separate through horizontal baffle in the rectangular substrate and form, first illumination board and second illumination board insert the rectangular substrate respectively through first picture peg and second picture peg in, form upper end open-ended box structure, at the upper portion opening part lock end cover of this box structure, the lower extreme of end cover is equipped with a plurality of locating pins, respectively with first projection board, the second projection board, the spliced eye grafting cooperation that corresponds on first illumination board and the second illumination board, make this device form an enclosure space.
2. The tri-view simulation apparatus of claim 1, further comprising:
and the supporting rods are respectively supported between any two simulation balls and are used for constructing the three-dimensional structure.
3. The tri-view simulation apparatus of claim 2, wherein the support bar comprises:
a sleeve;
and the two elastic supporting rods are respectively arranged at two ends of the sleeve in a penetrating way and are used for abutting against the end surface of the simulation ball.
4. The device according to claim 1, wherein the rectangular substrate has a grid line on an upper surface thereof, and the simulation pillars have lower ends respectively disposed at intersections of the grid line.
5. The device of claim 4, wherein the rectangular substrate has a plurality of insertion holes at the intersections of the grid lines, and the simulation posts are inserted into the rectangular substrate through the insertion holes.
6. The tri-view simulation apparatus of claim 1, wherein the simulation column comprises:
the base column is vertically arranged on the rectangular substrate;
the telescopic link slides and wears to locate on the foundation post for drive is located the telescopic link upper end the analog column lift adjustment.
7. A device according to claim 6, wherein the side walls of the telescopic rod are provided with graduations along their length.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910865079.7A CN110570713B (en) | 2019-09-09 | 2019-09-09 | Three-view simulation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910865079.7A CN110570713B (en) | 2019-09-09 | 2019-09-09 | Three-view simulation device |
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| Publication Number | Publication Date |
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| CN110570713A CN110570713A (en) | 2019-12-13 |
| CN110570713B true CN110570713B (en) | 2021-07-30 |
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| CN201910865079.7A Expired - Fee Related CN110570713B (en) | 2019-09-09 | 2019-09-09 | Three-view simulation device |
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| CN2921994Y (en) * | 2006-07-04 | 2007-07-11 | 张占伟 | Projection eductional demostration board |
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| CN201757946U (en) * | 2010-08-04 | 2011-03-09 | 鹿宝云 | Multifunctional three-view projector |
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| CN205722576U (en) * | 2016-03-10 | 2016-11-23 | 云南经济管理学院 | Multi-use architecture Orthographic view projection model |
| CN206194255U (en) * | 2016-10-26 | 2017-05-24 | 陕西工业职业技术学院 | Truss connection structure presentation device |
| CN209133025U (en) * | 2018-09-17 | 2019-07-19 | 郭冠麟 | A kind of Orthographic view projection model with magnetic telescopic rod |
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2019
- 2019-09-09 CN CN201910865079.7A patent/CN110570713B/en not_active Expired - Fee Related
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2921994Y (en) * | 2006-07-04 | 2007-07-11 | 张占伟 | Projection eductional demostration board |
| CN201397597Y (en) * | 2009-03-20 | 2010-02-03 | 兰州理工大学 | Three-view mathmatics teaching aid for middle and primary schools |
| CN201757946U (en) * | 2010-08-04 | 2011-03-09 | 鹿宝云 | Multifunctional three-view projector |
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| CN204740779U (en) * | 2015-06-26 | 2015-11-04 | 涿州金诺士教仪设备有限公司 | How much company side's experimental boxs |
| CN205281825U (en) * | 2015-12-04 | 2016-06-01 | 潍坊工商职业学院 | Mechanical drawing three views is teaching aid for projection |
| CN205722576U (en) * | 2016-03-10 | 2016-11-23 | 云南经济管理学院 | Multi-use architecture Orthographic view projection model |
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| CN209133025U (en) * | 2018-09-17 | 2019-07-19 | 郭冠麟 | A kind of Orthographic view projection model with magnetic telescopic rod |
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