CN112634730A - Travel agency operation simulation teaching sand table combined with AR interactive display - Google Patents
Travel agency operation simulation teaching sand table combined with AR interactive display Download PDFInfo
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- CN112634730A CN112634730A CN202011541699.4A CN202011541699A CN112634730A CN 112634730 A CN112634730 A CN 112634730A CN 202011541699 A CN202011541699 A CN 202011541699A CN 112634730 A CN112634730 A CN 112634730A
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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
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Abstract
The invention discloses an AR interaction display combined travel agency operation simulation teaching sand table which comprises a sand table body and a protective top plate, wherein a bottom frame is fixedly installed at the bottom end of the sand table body, universal wheels are fixedly installed at four corners of the bottom end of the bottom frame, a driving assembly is arranged at the bottom of the bottom frame, lifting mechanisms are arranged on two sides of the sand table body in a sliding mode, the top ends of the lifting mechanisms are fixedly installed on two sides of the bottom end of the protective top plate correspondingly, and stabilizing assemblies are fixedly installed at the lower ends of two sides of the bottom frame; according to the sand table, the lifting mechanism is arranged to drive the protective top plate to move up and down, and when the protective top plate moves down and contacts with the top end of the sand table body, the protective top plate protects components in the sand table body, so that the components are prevented from being damaged when the sand table body is not used, and the using effect of the whole sand table is improved.
Description
Technical Field
The invention relates to the technical field of teaching sand tables, in particular to a travel agency operation simulation teaching sand table combined with AR interactive display.
Background
The travel agency operation simulation teaching sand table simulates the travel agency operation business, so that students can understand scientific management rules and improve management planning capacity in a series of activities such as travel market analysis, strategy making, marketing, business development, metering and dispatching management, purchasing management, human resource management, financial settlement and the like; meanwhile, the travel agency operation simulation teaching sand table can help students who participate in training to deeply understand the strategy management, the overall operation, the team construction and the communication management of the travel agency, and can effectively improve the capacity of business plans and business decisions of managers of the travel agency, wherein most of the existing travel agency operation simulation teaching sand tables are liquid crystal display and touch control, and an AR interaction technology is added to the existing travel agency operation simulation teaching sand table in order to enable the students to better understand the strategy management, the overall operation, the team construction and the communication management of the travel agency;
however, the existing travel agency operation simulation teaching sand table combined with AR interactive display lacks a protection piece on the top of the sand table, when the sand table is not used for placing, parts in the sand table are easily damaged, the whole sand table is inconvenient to move and fix, the flexibility is low, the using effect of the sand table is reduced, and therefore a novel travel agency operation simulation teaching sand table combined with AR interactive display is provided for solving the problems.
Disclosure of Invention
The invention aims to provide a travel agency operation simulation teaching sand table combined with AR interactive display, so as to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a travel agency operation simulation teaching sand table combined with AR interactive display comprises a sand table body and a protective top table, wherein a bottom frame is fixedly mounted at the bottom end of the sand table body, universal wheels are fixedly mounted at four corners of the bottom end of the bottom frame, a driving assembly is arranged at the bottom of the bottom frame, lifting mechanisms are slidably arranged on two sides of the sand table body, the top ends of the lifting mechanisms are fixedly mounted on two sides of the bottom end of the protective top table correspondingly, and stabilizing assemblies are fixedly mounted at the lower ends of two sides of the bottom frame;
the lifting mechanism comprises a mechanism outer cylinder, mechanism clamping protrusions which are symmetrically distributed are fixedly arranged on the outer surface of the mechanism outer cylinder, limiting through grooves matched with the mechanism outer cylinder and the mechanism clamping protrusions are formed in the two sides of the sand table body, the mechanism outer cylinder and the mechanism clamping protrusions are inserted into the limiting through grooves in a sliding mode, a lifting screw groove is formed in the middle of the bottom end of the mechanism outer cylinder, a lifting screw rod is arranged in the lifting screw groove in a clamping mode through threads, the bottom of the lifting screw rod extends out of the bottom end of the mechanism outer cylinder and is rotatably sleeved with a connecting seat, one side of the connecting seat and one side of a bottom frame are fixedly installed, and the lifting mechanism corresponds to the top end of the mechanism outer cylinder and is fixedly installed on;
the firm subassembly is including blocking slide and subassembly urceolus, flexible thread groove has been seted up at the top middle part of subassembly urceolus, thread clamp is equipped with flexible screw rod in the flexible thread groove, the external fixed surface of subassembly urceolus is equipped with the subassembly card that is the symmetric distribution protrudingly, card slide top one side is seted up and is slided the groove with the protruding card that uses of subassembly urceolus, subassembly card, and the protruding slip of subassembly urceolus and subassembly card is pegged graft in the groove is slided to the card, the firm subassembly corresponds the both sides lower extreme fixed mounting with the underframe through one side of blocking the slide, the bottom fixed mounting of subassembly urceolus has the slipmat.
As a preferred technical scheme of the present invention, an operation cavity matched with a driving assembly is formed at the bottom of the bottom frame, the driving assembly includes a main rod and two auxiliary rods, the two auxiliary rods are symmetrically distributed, the two auxiliary rods and the main rod are vertically distributed, the main rod is rotatably inserted into the middle of one side of the bottom frame, the two auxiliary rods are respectively rotatably inserted into the middle of two sides of the adjacent bottom frame of the main rod, opposite sides of the two auxiliary rods extend into the operation cavity and are fixedly provided with driven gears, one end of the main rod extends into the operation cavity and is fixedly provided with side gears, the side gears are meshed with the two driven gears, one side of the two auxiliary rods, which is deviated from the main rod, respectively penetrates through two sides of the bottom frame and is fixedly provided with driving umbrella teeth, and one side of the top ends of the driving umbrella teeth are vertically meshed with the driven umbrella teeth.
As a preferable technical solution of the present invention, one side of the main rod, which is far away from the side gear, passes through one side of the bottom frame and is fixedly provided with a rotating wheel.
As a preferable technical scheme of the invention, the bottom end of the lifting screw is fixedly connected with the middle part of the top end of the corresponding driven bevel gear.
As a preferable technical scheme of the invention, the top end of the telescopic screw rod is fixedly connected with the middle part of the bottom end of the corresponding driven bevel gear.
As a preferable technical scheme of the invention, the protective top plate and the sand table body have the same size.
As a preferred technical scheme of the invention, symmetrically distributed illuminating lamps are fixedly arranged on the upper surface of the inner wall of the protective top plate.
As a preferable technical scheme of the invention, the upper part of the bottom frame is provided with a storage groove, and a plurality of groups of partition plates are vertically arranged in the storage groove.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the sand table, the lifting mechanism is arranged to drive the protective top plate to move up and down, when the protective top plate moves down and contacts with the top end of the sand table body, the protective top plate protects the parts in the sand table body, the parts are prevented from being damaged when the sand table body is not used, and therefore the using effect of the whole sand table is improved.
2. Through setting up firm subassembly, move down and when ground contact when the slipmat, through the frictional force between slipmat and the ground, can carry out the rigidity to whole teaching sand table, prevent that the sand table from carrying out the position when using and removing to whole teaching sand table stability when using has been improved.
3. Through setting up drive assembly, can drive the lifting screw that both sides correspond and flexible screw rod in step and carry out synchronous rotation to the mechanism urceolus and the slipmat that realize both sides correspond move up and down in step, have promoted the result of use of whole teaching sand table.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view showing a connection of a part of the structure of the present invention;
FIG. 3 is an enlarged view taken at A of FIG. 2 in accordance with the present invention;
FIG. 4 is an enlarged view taken at B of FIG. 2 in accordance with the present invention;
FIG. 5 is a schematic connection diagram of a part of the structure of the present invention.
In the figure: 1. a sand table body; 2. a bottom frame; 3. a universal wheel; 4. a drive assembly; 5. a lifting mechanism; 6. an illuminating lamp; 7. a protective top plate; 8. a stabilizing assembly; 9. a partition plate; 101. limiting and penetrating the groove; 201. a storage tank; 202. a working chamber; 41. a main rod; 42. an auxiliary rod; 43. a side gear; 44. a driven gear; 45. the bevel gear is driven; 46. driven bevel gears; 47. a rotating wheel; 51. a mechanism outer cylinder; 511. the mechanism is clamped and protruded; 512. a lifting screw groove; 52. a lifting screw; 53. a connecting seat; 81. a card slide; 811. the card slides through the slot; 82. an outer component barrel; 821. the component is clamped and protruded; 822. a telescopic screw groove; 83. a telescopic screw; 84. a non-slip mat.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-5, the present invention provides a technical solution: a travel agency operation simulation teaching sand table combined with AR interactive display comprises a sand table body 1 and a protective top plate 7, wherein AR technology is arranged on the sand table body 1, a bottom frame 2 is fixedly arranged at the bottom end of the sand table body 1, universal wheels 3 are fixedly arranged at four corners of the bottom end of the bottom frame 2, the whole teaching sand table can be conveniently moved by using the universal wheels 3, the whole teaching sand table can be conveniently used, a driving assembly 4 is arranged at the bottom of the bottom frame 2, lifting mechanisms 5 are slidably arranged on two sides of the sand table body 1, the top ends of the lifting mechanisms 5 correspond to and are fixedly arranged on two sides of the bottom end of the protective top plate 7, and stabilizing assemblies 8 are fixedly arranged at the lower ends of two sides of the bottom frame 2; the protective top plate 7 and the sand table body 1 are the same in size, when the protective top plate 7 moves downwards and contacts with the top end of the sand table body 1, components in the sand table body 1 can be effectively protected, and the components are prevented from being damaged when the sand table body 1 is not used; symmetrically distributed illuminating lamps 6 are fixedly arranged on the upper surface of the inner wall of the protective top plate 7 to illuminate the sand table body 1, so that the teaching effect of the teaching sand table is improved; storage tank 201 has been seted up on the upper portion of underframe 2, and the perpendicular installation has multiunit spacer plate 9 to separate storage tank 201 through multiunit spacer plate 9 in storage tank 201, makes things convenient for categorised different debris of placing.
The lifting mechanism 5 comprises a mechanism outer cylinder 51, mechanism clamping protrusions 511 which are symmetrically distributed are fixedly arranged on the outer surface of the mechanism outer cylinder 51, limiting through grooves 101 matched with the mechanism outer cylinder 51 and the mechanism clamping protrusions 511 are formed in two sides of the sand table body 1, the mechanism outer cylinder 51 and the mechanism clamping protrusions 511 are inserted in the limiting through grooves 101 in a sliding mode, the mechanism outer cylinder 51 and the mechanism clamping protrusions 511 can move up and down in the limiting through grooves 101, a lifting screw groove 512 is formed in the middle of the bottom end of the mechanism outer cylinder 51, a lifting screw rod 52 is arranged in the lifting screw groove 512 in a threaded clamping mode, the bottom of the lifting screw rod 52 extends out of the bottom end of the mechanism outer cylinder 51 and is rotatably sleeved with a connecting seat 53, one side of the connecting seat 53 and one side of the bottom frame 2 are fixedly installed, the lifting mechanism 5 is fixedly installed corresponding to two sides of the bottom end of the protective top plate 7 through the, the mechanism outer cylinder 51 and the mechanism clamping protrusions 511 on the two sides can be synchronously driven to move up and down in the limiting penetrating groove 101, so that the protective top disc 7 is driven to move up and down.
The stabilizing component 8 comprises a clamping slide seat 81 and a component outer cylinder 82, a telescopic screw groove 822 is formed in the middle of the top end of the component outer cylinder 82, a telescopic screw 83 is arranged in the telescopic screw groove 822 in a threaded clamping manner, component clamping protrusions 821 which are symmetrically distributed are fixedly arranged on the outer surface of the component outer cylinder 82, a clamping sliding groove 811 which is matched with the component outer cylinder 82 and the component clamping protrusions 821 for use is formed in one side of the top end of the clamping slide seat 81, the component outer cylinder 82 and the component clamping protrusions 821 are inserted into the clamping sliding groove 811 in a sliding manner, the component outer cylinder 82 and the component clamping protrusions 821 can move up and down in the clamping sliding groove 811, the stabilizing component 8 is correspondingly and fixedly installed at the lower ends of two sides of the bottom frame 2 through one side of the clamping slide seat 81, an anti-skid pad 84 is fixedly installed at the bottom end of the component outer cylinder 82, the component outer cylinder 82 and the component clamping protrusions 821 on two sides can, thereby drive slipmat 84 and reciprocate, when slipmat 84 moved down and contact with the ground, through the frictional force between slipmat 84 and the ground, can carry out the rigidity to whole teaching sand table, prevent that the sand table from carrying out the position when using and removing to the stability when having improved whole teaching sand table and using.
An operation cavity 202 matched with the driving component 4 for use is formed in the bottom of the bottom frame 2, the driving component 4 comprises a main rod 41 and auxiliary rods 42, the auxiliary rods 42 are symmetrically distributed in two groups, the two groups of auxiliary rods 42 and the main rod 41 are in a vertical distribution structure, the main rod 41 is rotatably inserted in the middle of one side of the bottom frame 2, the two groups of auxiliary rods 42 are rotatably inserted in the middle of two sides of the bottom frame 2 adjacent to the main rod 41 respectively, opposite sides of the two groups of auxiliary rods 42 extend into the operation cavity 202 and are fixedly provided with driven gears 44, one end of the main rod 41 extends into the operation cavity 202 and is fixedly provided with side gears 43, the side gears 43 are meshed with the two groups of driven gears 44, one sides of the two groups of auxiliary rods 42, which are deviated from each other, penetrate through two sides of the bottom frame 2 and are fixedly provided with driving bevel gears 45, and one side; one side of the main rod 41 far away from the side gear 43 passes through one side of the bottom frame 2 and is fixedly provided with a rotating wheel 47; the main rod 41 is driven to rotate clockwise and anticlockwise through manually rotating the rotating wheel 47 clockwise and anticlockwise, so that the auxiliary rods 42 on the two sides are driven to rotate synchronously, and the driven bevel gears 46 on the two sides are driven to rotate synchronously clockwise and anticlockwise.
The bottom end of the lifting screw 52 is fixedly connected with the middle part of the top end of the corresponding driven bevel gear 46; the top of flexible screw 83 and the bottom middle part fixed connection of the driven bevel gear 46 that corresponds carry out synchronous clockwise or anticlockwise rotation through the driven bevel gear 46 of both sides, can drive the corresponding lifting screw 52 of both sides and flexible screw 83 in step and rotate to realize that the mechanism urceolus 51 and the slipmat 84 that both sides correspond move up and down in step, promoted the result of use of whole teaching sand table.
The working principle is as follows: the invention relates to a travel agency operation simulation teaching sand table combined with AR interactive display, when the teaching sand table needs to be used, the whole teaching sand table is moved to a proper teaching position by using a universal wheel 3, then a main rod 41 is driven to rotate by manually rotating a rotating wheel 47, further auxiliary rods 42 on two sides are synchronously driven to rotate, so that driven umbrella teeth 46 on two sides are driven to synchronously rotate, corresponding lifting screw rods 52 and telescopic screw rods 83 on two sides can be synchronously driven to synchronously rotate when the driven umbrella teeth 46 on two sides synchronously rotate, mechanism outer cylinders 51 and mechanism clamping protrusions 511 on two sides can be synchronously driven to move upwards in a limiting through groove 101 by rotating the lifting screw rods 52 on two sides, so that a protective top plate 7 is driven to move upwards, parts in a sand table body 1 are displayed for use, and the telescopic screw rods 83 on two sides rotate, can move down in the groove 811 is worn in the card to the subassembly urceolus 82 and the subassembly card of both sides in step, thereby drive slipmat 84 and move down, move down and when ground contact when slipmat 84, through the frictional force between slipmat 84 and the ground, can carry out the rigidity to whole teaching sand table, prevent that the sand table from carrying out the position when using and removing, thereby the stability when having improved whole teaching sand table uses, after finishing using, reverse direction rotation runner 47, hold-in range moves protection top dish 7 and moves down and slipmat 84 shifts up and break away from ground, through using universal wheel 3, carry out the position to whole teaching sand table and remove, make things convenient for the position removal of whole teaching sand table, thereby convenient the accomodating is placed.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. The utility model provides a travel agency operation simulation teaching sand table that combines AR interactive exhibition, includes sand table body (1) and protection top dish (7), its characterized in that: a bottom frame (2) is fixedly installed at the bottom end of the sand table body (1), universal wheels (3) are fixedly installed at four corners of the bottom end of the bottom frame (2), a driving assembly (4) is arranged at the bottom of the bottom frame (2), lifting mechanisms (5) are slidably arranged on two sides of the sand table body (1), the top ends of the lifting mechanisms (5) correspond to two sides of the bottom end of the protective top plate (7) and are fixedly installed, and stabilizing assemblies (8) are fixedly installed at the lower ends of two sides of the bottom frame (2);
the lifting mechanism (5) comprises a mechanism outer cylinder (51), mechanism clamping protrusions (511) which are symmetrically distributed are fixedly arranged on the outer surface of the mechanism outer cylinder (51), two sides of the sand table body (1) are provided with a limiting through groove (101) which is matched with the mechanism outer cylinder (51) and the mechanism clamping protrusion (511) for use, and the mechanism outer cylinder (51) and the mechanism clamping protrusion (511) are inserted in the limiting through groove (101) in a sliding way, the middle part of the bottom end of the outer cylinder (51) of the mechanism is provided with a lifting screw groove (512), a lifting screw rod (52) is clamped in the lifting screw groove (512) through threads, the bottom of the lifting screw rod (52) extends out of the bottom end of the mechanism outer cylinder (51) and is rotatably sleeved with a connecting seat (53), one side of the connecting seat (53) and one side of the bottom frame (2) are fixedly arranged, the lifting mechanism (5) is fixedly installed at two sides of the bottom end of the protective top disc (7) through the top end of the mechanism outer cylinder (51) correspondingly;
firm subassembly (8) are including blocking slide (81) and subassembly urceolus (82), flexible thread groove (822) have been seted up at the top middle part of subassembly urceolus (82), the screw clamp is equipped with flexible screw rod (83) in flexible thread groove (822), the external fixed surface of subassembly urceolus (82) is equipped with subassembly card protruding (821) that are symmetric distribution, block slide (81) top one side seted up with subassembly urceolus (82), the protruding (821) cooperation of subassembly card is used card slide groove (811), and subassembly urceolus (82) and the protruding (821) of subassembly card slide and peg graft in card slide groove (811), firm subassembly (8) correspond and the both sides lower extreme fixed mounting of underframe (2) through one side of blocking slide (81), the bottom fixed mounting of subassembly urceolus (82) has slipmat (84).
2. The AR interactive presentation combined travel agency operation simulation teaching sand table as claimed in claim 1, wherein: the bottom of underframe (2) is seted up and is used with drive assembly (4) cooperation operation chamber (202), drive assembly (4) include mobile jib (41) and assist pole (42), assist pole (42) to be equipped with two sets of that are the symmetric distribution, two sets of assist pole (42) and mobile jib (41) are perpendicular distribution structure, mobile jib (41) rotate and peg graft in one side middle part of underframe (2), two sets of assist pole (42) rotate respectively and insert the both sides middle part of establishing in the adjacent underframe (2) of mobile jib (41), two sets of assist pole (42) relative side extend into operation chamber (202) and fixed mounting has driven gear (44), the one end of mobile jib (41) extends into operation chamber (202) and fixed mounting has side gear (43), side gear (43) and two sets of driven gear (44) meshing connection, two sets of one side that assist pole (42) to deviate from passes the both sides of underframe (2) respectively and fixed mounting has drive bevel gear (45), one side of the top end of the driving bevel gear (45) is vertically meshed with a driven bevel gear (46).
3. The AR interactive presentation combined travel agency operation simulation teaching sand table as claimed in claim 2, wherein: one side of the main rod (41) far away from the side gear (43) penetrates through one side of the bottom frame (2) and is fixedly provided with a rotating wheel (47).
4. The AR interactive presentation combined travel agency operation simulation teaching sand table as claimed in claim 1, wherein: the bottom end of the lifting screw rod (52) is fixedly connected with the middle part of the top end of the corresponding driven bevel gear (46).
5. The AR interactive presentation combined travel agency operation simulation teaching sand table as claimed in claim 1, wherein: the top end of the telescopic screw rod (83) is fixedly connected with the middle part of the bottom end of the corresponding driven bevel gear (46).
6. The AR interactive presentation combined travel agency operation simulation teaching sand table as claimed in claim 1, wherein: the protective top plate (7) and the sand table body (1) are the same in size.
7. The AR interactive presentation combined travel agency operation simulation teaching sand table as claimed in claim 1, wherein: the upper surface of the inner wall of the protective top plate (7) is fixedly provided with symmetrically distributed illuminating lamps (6).
8. The AR interactive presentation combined travel agency operation simulation teaching sand table as claimed in claim 1, wherein: a storage groove (201) is formed in the upper portion of the bottom frame (2), and a plurality of groups of partition plates (9) are vertically installed in the storage groove (201).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011541699.4A CN112634730A (en) | 2020-12-23 | 2020-12-23 | Travel agency operation simulation teaching sand table combined with AR interactive display |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011541699.4A CN112634730A (en) | 2020-12-23 | 2020-12-23 | Travel agency operation simulation teaching sand table combined with AR interactive display |
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| Publication Number | Publication Date |
|---|---|
| CN112634730A true CN112634730A (en) | 2021-04-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011541699.4A Pending CN112634730A (en) | 2020-12-23 | 2020-12-23 | Travel agency operation simulation teaching sand table combined with AR interactive display |
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| CN (1) | CN112634730A (en) |
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| CN209765806U (en) * | 2019-01-29 | 2019-12-10 | 南阳职业学院 | Novel sand table is used in tourism management teaching |
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| CN210836798U (en) * | 2019-09-29 | 2020-06-23 | 中科星图(深圳)数字技术产业研发中心有限公司 | Adjustable AR sand table |
| CN210925178U (en) * | 2019-11-01 | 2020-07-03 | 天津岩瑞科技有限公司 | Improved movable sand table frame |
| CN111599222A (en) * | 2020-06-11 | 2020-08-28 | 浙江商汤科技开发有限公司 | Sand table display method and device |
| CN211673426U (en) * | 2020-01-15 | 2020-10-16 | 何旭峰 | Sand table for residential area environment design |
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2020
- 2020-12-23 CN CN202011541699.4A patent/CN112634730A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205302807U (en) * | 2015-12-11 | 2016-06-08 | 章兰 | Remove sand table |
| CN209487016U (en) * | 2018-12-27 | 2019-10-11 | 榆林学院 | A kind of mobile sand table of Destination Management teaching |
| CN209765806U (en) * | 2019-01-29 | 2019-12-10 | 南阳职业学院 | Novel sand table is used in tourism management teaching |
| CN210836798U (en) * | 2019-09-29 | 2020-06-23 | 中科星图(深圳)数字技术产业研发中心有限公司 | Adjustable AR sand table |
| CN210925178U (en) * | 2019-11-01 | 2020-07-03 | 天津岩瑞科技有限公司 | Improved movable sand table frame |
| CN211673426U (en) * | 2020-01-15 | 2020-10-16 | 何旭峰 | Sand table for residential area environment design |
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Application publication date: 20210409 |
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