CN114571900A - Deformable multifunctional teaching aid - Google Patents

Deformable multifunctional teaching aid Download PDF

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Publication number
CN114571900A
CN114571900A CN202210351002.XA CN202210351002A CN114571900A CN 114571900 A CN114571900 A CN 114571900A CN 202210351002 A CN202210351002 A CN 202210351002A CN 114571900 A CN114571900 A CN 114571900A
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CN
China
Prior art keywords
rod
shaped
connecting block
teaching
block
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Granted
Application number
CN202210351002.XA
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Chinese (zh)
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CN114571900B (en
Inventor
金志利
王新庄
王庆华
张艳林
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Henan Vocational College of Nursing
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Henan Vocational College of Nursing
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Priority to CN202210351002.XA priority Critical patent/CN114571900B/en
Publication of CN114571900A publication Critical patent/CN114571900A/en
Application granted granted Critical
Publication of CN114571900B publication Critical patent/CN114571900B/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B43WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43LARTICLES FOR WRITING OR DRAWING UPON; WRITING OR DRAWING AIDS; ACCESSORIES FOR WRITING OR DRAWING
    • B43L13/00Drawing instruments, or writing or drawing appliances or accessories not otherwise provided for
    • B43L13/001Mathematical drawing instruments
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B43WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43LARTICLES FOR WRITING OR DRAWING UPON; WRITING OR DRAWING AIDS; ACCESSORIES FOR WRITING OR DRAWING
    • B43L9/00Circular curve-drawing or like instruments
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09BEDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
    • G09B17/00Teaching reading
    • G09B17/02Line indicators or other guides or masks

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  • 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)
  • Pivots And Pivotal Connections (AREA)

Abstract

The invention belongs to the technical field of teaching aids, and particularly relates to a deformable multifunctional teaching aid which comprises a connecting block, wherein a U-shaped groove for resetting a teaching rod is formed in the upper end of the connecting block, a T-shaped rod for transmission is arranged at the outer end of the connecting block, an arc-shaped block for rotation adjustment of the teaching rod is arranged at the other end of the connecting block, the telescopic rod is sleeved in the teaching rod and is sleeved with a limiting rod, so that the telescopic rod slides in the teaching rod through the telescopic rod, the using length of the teaching rod is adjusted, meanwhile, L-shaped grooves which are uniformly distributed are formed in the outer end of the teaching rod, and a limiting block at the bottom end of the telescopic rod is limited through the structural arrangement of the L-shaped grooves, so that the telescopic length of the telescopic rod is limited, the T-shaped rod is connected through internal clamping, the connecting block and a circular plate are conveniently limited and fixed, and the connecting block, the circular plate and the circular plate are convenient to use, The combination and the dismantlement effect of teaching pole, and then realize the measuring action of arc angle through the circular slab to the result of use of device of being convenient for.

Description

Deformable multifunctional teaching aid
Technical Field
The invention belongs to the technical field of teaching aids, and particularly relates to a deformable multifunctional teaching aid.
Background
The teaching aid is a material object for propagating science and technology and educating people, and is an indispensable device in teenager science and technology activities.
Its structure of original deformable teaching aid is too simple, and the function singleness often needs multiple teaching aid cooperation to use at the in-process that uses, not only inconvenient carrying uses the step loaded down with trivial details moreover, leads to influencing the demonstration effect.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a deformable multifunctional teaching aid which has the characteristics of simple structure, compact connection, convenience in adjustment and diversified functions.
In order to achieve the purpose, the invention provides the following technical scheme: a deformable multifunctional teaching aid comprises a connecting block, wherein a U-shaped groove for resetting a teaching rod is arranged at the upper end of the connecting block, a T-shaped rod for transmission is arranged at the outer end of the connecting block, an arc-shaped block for regulating the rotation of the teaching rod is arranged at the other end of the connecting block, angle scales are arranged at the outer end of the arc-shaped block, and is internally provided with a T-shaped sliding chute for limiting sliding of the T-shaped sliding block, the lower end of the connecting block is connected with the circular plate through the transmission of the T-shaped rod, arc-shaped grooves are uniformly distributed at the joint of the circular plate and the connecting block, the outer end of the circular plate is circular, and is provided with an angle dial disc controlled by an angle, the connecting block is connected with a teaching rod through a U-shaped groove, the teaching rod is internally provided with a hollow-out shape, and is sleeved and connected with a telescopic rod, the inside of the telescopic rod is hollowed out and is sleeved and connected with the limiting rod, the bottom end of the telescopic rod is provided with a limiting block which is connected with the L-shaped groove in a limiting sleeved mode, and the limiting block is arranged in an L shape.
According to the preferable technical scheme of the deformable multifunctional teaching aid, a limiting rod used for limiting sliding of the telescopic rod is fixedly connected in the teaching rod, a connecting spring used for resetting the telescopic rod is connected to the outer end of the limiting rod in a sleeved mode, an L-shaped groove used for limiting the telescopic rod is formed in the upper end of the teaching rod, the L-shaped groove is arranged in an L shape and is stacked and distributed, and a rectangular light groove is formed in the middle of the connection portion of the L-shaped groove and the rectangular light groove.
As a preferable technical scheme of the deformable multifunctional teaching aid, the lower end of the T-shaped rod is connected with the transmission rod through the rotating shaft, the middle of the transmission rod is connected with the connecting block through the rotating shaft, the other end of the transmission rod is fixedly connected with the V-shaped rod, and the other end of the V-shaped rod is inserted into the arc-shaped groove in the position of the circular plate in a limiting mode.
According to the preferable technical scheme of the deformable multifunctional teaching aid, the first reset spring for resetting is arranged at the bottom of the T-shaped rod, the two sides of the T-shaped rod are respectively provided with a lug for limiting and sliding the T-shaped rod, the other end of the lug of the T-shaped rod is connected to the connecting rod in a sleeved mode, and the second reset spring for resetting the T-shaped rod is further connected to the connecting rod in a sleeved mode.
According to the preferable technical scheme of the deformable multifunctional teaching aid, a damping rotating shaft used for limiting rotation of the teaching rod is arranged in a U-shaped groove of the connecting block, the teaching rod is connected in a sleeved mode in the middle of the damping rotating shaft, a T-shaped sliding block used for limiting sliding is arranged at the outer end of the connecting position of the teaching rod and the damping rotating shaft, the other end of the T-shaped sliding block is connected in a T-shaped sliding groove of the arc-shaped block in a limiting mode, the outer end of the T-shaped sliding block is connected with the positioning rod, and the outer end of the positioning rod is distributed in a triangular shape.
According to the preferable technical scheme of the deformable multifunctional teaching aid, one end of the connecting block is provided with a supporting frame for achieving an original point effect, the other end of the connecting block is provided with a circular hole for positioning and placing a chalk, the lower end of the supporting frame is distributed in a pointed angle shape, and a rubber pad is further connected to the circular hole of the connecting block in a sleeved mode.
According to the preferable technical scheme of the deformable multifunctional teaching aid, a rotating shaft used for connecting the connecting blocks is arranged at the circle center of the circular plate, a sliding groove used for limiting rotation of the connecting blocks is arranged at the outer end of the circular plate, an arc-shaped sliding block is arranged at the joint of the sliding groove and the connecting blocks, and screws used for locking are arranged at two ends of the arc-shaped sliding block.
Compared with the prior art, the invention has the beneficial effects that:
through the arrangement of the teaching rod and the telescopic rod, the telescopic rod is sleeved in the teaching rod, and the limiting rod is connected with the telescopic rod in a sleeved mode, so that the telescopic rod slides in the teaching rod, the use length of the teaching rod is adjusted, meanwhile, the outer end of the teaching rod is provided with L-shaped grooves which are uniformly distributed, and through the structural arrangement of the L-shaped grooves, the limiting block at the bottom end of the telescopic rod is limited, and the telescopic length of the telescopic rod is limited;
through the arrangement of the T-shaped rod, the T-shaped rod is connected through internal clamping, so that the connecting block and the circular plate are convenient to limit and fix, the connecting block, the circular plate and the teaching rod are convenient to combine and disassemble, the circular plate is convenient to measure the arc angle, and the using effect of the device is convenient;
through the arrangement of the arc-shaped block, one end of the arc-shaped block is provided with a sliding groove for limiting and sliding the T-shaped sliding block, and the teaching rod can conveniently rotate under the action of the damping rotating shaft, so that the angle between the teaching rod and the connecting block can be adjusted, and the device has a good accommodating effect;
through the support frame setting, the support frame plays the original point supporting role to through the round hole setting of connecting block other end rubber pad department, drawing arc angle that can be fine.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is an enlarged partial view of portion A of FIG. 1;
FIG. 3 is a schematic side view of the present invention;
FIG. 4 is a side view partially in section of the connecting block according to the present invention;
FIG. 5 is an enlarged partial view of portion B of FIG. 4 according to the present invention;
FIG. 6 is a schematic view of a top view of a partially cut-away structure of an arc-shaped block of the present invention;
in the figure: 1. connecting blocks; 2. a circular plate; 3. a teaching rod; 4. a telescopic rod; 5. a rubber pad; 6. an L-shaped slot; 7. a support frame; 8. an arc-shaped sliding block; 9. a sliding groove; 10. a T-shaped rod; 11. an arc-shaped block; 12. positioning a rod; 13. a limiting block; 14. a damping rotating shaft; 15. a limiting rod; 16. a connecting spring; 17. a first return spring; 18. a transmission rod; 19. a V-shaped rod; 20. a connecting rod; 21. a second return spring; 22. t-shaped sliding blocks.
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.
Examples
Referring to fig. 1-6, the present invention provides the following technical solutions: a deformable multifunctional teaching aid comprises a connecting block 1, wherein the upper end of the connecting block 1 is provided with a U-shaped groove for resetting a teaching rod 3, the outer end of the connecting block is provided with a T-shaped rod 10 for transmission, the other end of the connecting block is provided with an arc-shaped block 11 for rotation adjustment of the teaching rod 3, the outer end of the arc-shaped block 11 is provided with angle scales and is internally provided with a T-shaped sliding groove for limiting and sliding of a T-shaped sliding block 22, the lower end of the connecting block 1 is connected with a circular plate 2 through the transmission of the T-shaped rod 10, the joint of the circular plate 2 and the connecting block 1 is provided with evenly distributed arc-shaped grooves, the outer end of the circular plate is provided with a circular shape and an angle dial for angle control, the connecting block 1 is connected with the teaching rod 3 through the U-shaped groove, the teaching rod 3 is internally provided with a hollowed-out shape and is connected with a telescopic rod 4 in a sleeved mode, the telescopic rod 4 is internally provided with a hollowed-out shape and is connected at a limiting rod 15, the bottom end of the telescopic rod 4 is provided with a limiting block 13 in a sleeved mode connected with an L-shaped groove 6, the stopper 13 is L-shaped.
It is specific, fixedly connected with is used for the spacing gliding gag lever post 15 of telescopic link 4 in the teaching rod 3, and 15 outer ends registrates of gag lever post are connected with the coupling spring 16 that is used for telescopic link 4 to reset, 3 upper ends of teaching rod are equipped with and are used for the spacing L shape groove 6 of telescopic link 4, L shape groove 6 is the setting of L shape, and be and pile up the distribution, the middle department that L shape groove 6 both connect is established to the rectangle light groove, structure setting through L shape groove 6 in this embodiment, thereby make the stopper 13 of telescopic link 4 bottom carry on spacingly, thereby carry on spacingly to the flexible length of telescopic link 4, thereby control the flexible length of telescopic link 4.
Specifically, the lower end of the T-shaped rod 10 is connected with the transmission rod 18 through a rotating shaft, the middle of the transmission rod 18 is connected with the connecting block 1 through a rotating shaft, the other end of the transmission rod is fixedly connected with the V-shaped rod 19, the other end of the V-shaped rod 19 is limited to be inserted into the arc-shaped groove formed in the circular plate 2, the V-shaped rod 19 is inserted into the arc-shaped groove formed in the circular plate 2 through transmission of the T-shaped rod 10 in the embodiment, and the V-shaped rod 19 is limited and fixed in the circular plate 2 through the arc-shaped groove and the sliding groove of the transmission rod 18, so that the V-shaped rod 19 is limited and fixed in the circular plate 2, and the connecting block 1 and the circular plate 2 are limited and fixed.
Specifically, the bottom of the T-shaped rod 10 is set as a first return spring 17 for resetting, two sides are provided with convex blocks for limiting and sliding the T-shaped rod 10, the other end of the convex block of the T-shaped rod 10 is sleeved and connected at the position of the connecting rod 20, the position of the connecting rod 20 is further sleeved and connected with a second return spring 21 for resetting the T-shaped rod 10, the elastic capacity of the first return spring 17 and the second return spring 21 is utilized in the embodiment, the resetting effect on the T-shaped rod 10 is achieved, and meanwhile, through elastic force, a certain locking effect is achieved on the T-shaped rod 10.
Specifically, 1U-shaped inslot of connecting block is equipped with and is used for teaching pole 3 spacing pivoted damping pivot 14, department's registrate is connected with teaching pole 3 in the middle of the damping pivot 14, teaching pole 3 is equipped with the outer end with the 14 junctions of damping pivot and is used for spacing gliding T shape sliding block 22, the spacing T shape spout of connecting in arc piece 11 department of T shape sliding block 22 other end, and the outer end is connected with locating lever 12, locating lever 12 outer end is triangle-shaped and distributes, locating lever 12 passes through triangle-shaped setting in this embodiment, improvement that can be fine is to the reading of teaching pole 3 turned angle numerical value.
Specifically, 1 one end of connecting block is equipped with support frame 7 that is used for the initial point effect, and the other end is equipped with the circular port that is used for the chalk location to place, and 7 lower extremes of support frame are the distribution of closed angle form, and 1 circular port department of connecting block still the registrate is connected with rubber pad 5, increases the frictional force in chalk and 1 front end circular port of connecting block through rubber pad 5 in this embodiment, and then improves the stability of chalk.
Specifically, 2 centre of a circle departments of circular slab are equipped with the pivot that is used for connecting block 1 to connect, and outer end department is equipped with the spacing pivoted sliding tray 9 that is used for connecting block 1, and sliding tray 9 is equipped with arc sliding block 8 with 1 junction of connecting block, and 8 both ends of arc sliding block all are equipped with the screw that is used for locking, and the pivot of connecting block 1 and 2 junctions of circular slab is the same with damping pivot 14 in this embodiment, all establishes to the T shape through arc sliding block 8 and sliding tray 9, and is the symmetric distribution.
The working principle and the using process of the invention are as follows: according to the invention, the T-shaped rod 10 is extruded downwards, the T-shaped rod 10 drives the transmission rod 18 to slide downwards through the rotating shaft, at the moment, the transmission rod 18 is in a rotating state through the rotating shaft in the middle, so that the V-shaped rod 19 at the other end is driven to rotate, the circular plate 2 and the connecting block 1 are positioned and adapted, after the T-shaped rod 10 is released after the positioning is carried out, at the moment, the T-shaped rod 10 is reset through the elastic action of the first reset spring 17 and the second reset spring 21, and meanwhile, the other end of the V-shaped rod 19 is clamped in the arc-shaped groove in the circular plate 2; according to the requirement, the limiting block 13 is rotated, the telescopic rod 4 is stretched to a proper length, after the telescopic rod 4 is in place, the telescopic rod 4 is rotated to be clamped into the L-shaped groove 6, at the moment, the telescopic rod 4 is reset outwards under the elastic action of the connecting spring 16, and the limiting block 13 is in limiting clamping with the L-shaped groove 6; when the use angle of teaching rod 3 is adjusted to needs, will teach rod 3 and rotate through damping pivot 14, teach rod 3 and slide in the spout of arc 11 departments through the T shape sliding block 22 of bottom this moment, meanwhile, through the triangle-shaped lug of the locating lever 12 department that the T shape sliding block 22 other end is connected, observe the angle of opening and shutting between teaching rod 3 and connecting block 1, will teach rod 3 and adjust to suitable angle can.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (7)

1. A multi-functional teaching aid of flexible which characterized in that: comprises a connecting block (1), the upper end of the connecting block (1) is provided with a U-shaped groove for resetting a teaching rod (3), the outer end of the connecting block is provided with a T-shaped rod (10) for transmission, the other end of the connecting block is provided with a rotating adjusting arc-shaped block (11) for the teaching rod (3), the outer end of the arc-shaped block (11) is provided with angle scales, the T-shaped sliding groove for limiting and sliding of a T-shaped sliding block (22) is arranged in the arc-shaped groove, the lower end of the connecting block (1) is connected with a circular plate (2) through the transmission of the T-shaped rod (10), the joint of the circular plate (2) and the connecting block (1) is provided with the arc-shaped groove which is uniformly distributed, the outer end is externally provided with a circular shape and is provided with an angle dial for angle control, the connecting block (1) is connected with the teaching rod (3) through the U-shaped groove, the teaching rod (3) is internally provided with a hollowed shape and is sleeved with a telescopic rod (4), the telescopic rod (4) is internally provided with a hollowed shape, the telescopic rod is sleeved and connected with the limiting rod (15), the bottom end of the telescopic rod (4) is provided with a limiting block (13) which is in limiting sleeved connection with the L-shaped groove (6), and the limiting block (13) is arranged in an L shape.
2. A deformable multi-functional teaching aid according to claim 1, characterized in that: teaching pole (3) interior fixedly connected with is used for spacing gliding gag lever post (15) of telescopic link (4), and gag lever post (15) outer end registrates and is connected with connecting spring (16) that are used for telescopic link (4) to reset, teaching pole (3) upper end is equipped with and is used for the spacing L shape groove (6) of telescopic link (4), L shape groove (6) are the setting of L shape, and are the distribution of piling up, the middle department that L shape groove (6) both are connected establishes to the rectangle light groove.
3. A deformable multi-functional teaching aid according to claim 1, characterized in that: the lower end of the T-shaped rod (10) is connected with a transmission rod (18) through a rotating shaft, the middle of the transmission rod (18) is connected with a connecting block (1) through the rotating shaft, the other end of the transmission rod is fixedly connected with a V-shaped rod (19), and the other end of the V-shaped rod (19) is limited and inserted into an arc-shaped groove in the position of the circular plate (2).
4. A deformable multi-functional teaching aid according to claim 1, characterized in that: the T-shaped rod (10) is provided with a first reset spring (17) at the bottom for resetting, two sides of the T-shaped rod are provided with lugs for limiting and sliding the T-shaped rod (10), the other end of the lug of the T-shaped rod (10) is connected to a connecting rod (20) in a sleeved mode, and the connecting rod (20) is further connected with a second reset spring (21) for resetting the T-shaped rod (10) in a sleeved mode.
5. A deformable multi-functional teaching aid according to claim 1, characterized in that: connecting block (1) U-shaped inslot is equipped with and is used for teaching pole (3) spacing pivoted damping pivot (14), department's registrate is connected with teaching pole (3) in the middle of damping pivot (14), teaching pole (3) are equipped with the outer end of damping pivot (14) junction and are used for spacing gliding T shape sliding block (22), the spacing connection of T shape sliding block (22) other end is in the T shape spout of arc piece (11) department, and the outer end is connected with locating lever (12), locating lever (12) outer end is three horn shapes and distributes.
6. A deformable multi-functional teaching aid according to claim 1, characterized in that: connecting block (1) one end is equipped with support frame (7) that are used for the initial point effect, and the other end is equipped with the circular port that is used for the chalk location to place, support frame (7) lower extreme is the distribution of closed angle form, connecting block (1) circular port department still registrates and is connected with rubber pad (5).
7. A deformable multi-functional teaching aid according to claim 1, characterized in that: circular plate (2) centre of a circle department is equipped with the pivot that is used for connecting block (1) to connect, and outer end department is equipped with and is used for spacing pivoted sliding tray (9) of connecting block (1), sliding tray (9) are equipped with arc sliding block (8) with connecting block (1) junction, arc sliding block (8) both ends all are equipped with the screw that is used for locking.
CN202210351002.XA 2022-04-02 2022-04-02 Deformable multifunctional teaching aid Active CN114571900B (en)

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Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
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CN114571900A true CN114571900A (en) 2022-06-03
CN114571900B CN114571900B (en) 2024-03-19

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Publication number Priority date Publication date Assignee Title
CN201913963U (en) * 2010-11-30 2011-08-03 吴秀芳 Angular measurement plate
CN105904888A (en) * 2016-06-23 2016-08-31 冯云 multifunctional teaching ruler
CN206672429U (en) * 2017-02-27 2017-11-24 孙杰利 Multifunctional pointer
CN208290799U (en) * 2017-12-21 2018-12-28 周广猛 A kind of multipurpose mathematics teaching aid
CN208698282U (en) * 2018-01-21 2019-04-05 新昌县科畅科技咨询有限公司 A kind of Multifunctional teaching aid bar applied to mathematical education
CN210062511U (en) * 2019-06-13 2020-02-14 杨旭 High school mathematics teaching is with combination chi
CN111409382A (en) * 2020-04-07 2020-07-14 周子轩 Can accomodate teaching aid chi of teaching aid stick
CN211280429U (en) * 2019-12-30 2020-08-18 绍兴市技工学校 Multi-functional teaching aid for mathematical education
CN211857835U (en) * 2020-02-04 2020-11-03 睢宁宝源新能源发电有限公司 Teaching stick is used in teaching of convenient regulation length
CN211918213U (en) * 2020-03-31 2020-11-13 盐城工业职业技术学院 Multifunctional math teaching ruler
CN213525411U (en) * 2020-10-13 2021-06-25 云南省第二人民医院 Foreign matter pincers for gastroenterology
CN113085419A (en) * 2021-05-20 2021-07-09 重庆工程职业技术学院 Teaching is with supplementary drawing device
CN113199427A (en) * 2021-06-09 2021-08-03 杭州祥龙钻探设备科技股份有限公司 Assembly fixture of all-hydraulic drill chuck slips
CN214752395U (en) * 2021-04-08 2021-11-16 重庆电子工程职业学院 Teaching aid for ideological and political theory teaching of colleges and universities
CN215153461U (en) * 2020-12-30 2021-12-14 徐媛 Multifunctional mathematical drawing tool

Patent Citations (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201913963U (en) * 2010-11-30 2011-08-03 吴秀芳 Angular measurement plate
CN105904888A (en) * 2016-06-23 2016-08-31 冯云 multifunctional teaching ruler
CN206672429U (en) * 2017-02-27 2017-11-24 孙杰利 Multifunctional pointer
CN208290799U (en) * 2017-12-21 2018-12-28 周广猛 A kind of multipurpose mathematics teaching aid
CN208698282U (en) * 2018-01-21 2019-04-05 新昌县科畅科技咨询有限公司 A kind of Multifunctional teaching aid bar applied to mathematical education
CN210062511U (en) * 2019-06-13 2020-02-14 杨旭 High school mathematics teaching is with combination chi
CN211280429U (en) * 2019-12-30 2020-08-18 绍兴市技工学校 Multi-functional teaching aid for mathematical education
CN211857835U (en) * 2020-02-04 2020-11-03 睢宁宝源新能源发电有限公司 Teaching stick is used in teaching of convenient regulation length
CN211918213U (en) * 2020-03-31 2020-11-13 盐城工业职业技术学院 Multifunctional math teaching ruler
CN111409382A (en) * 2020-04-07 2020-07-14 周子轩 Can accomodate teaching aid chi of teaching aid stick
CN213525411U (en) * 2020-10-13 2021-06-25 云南省第二人民医院 Foreign matter pincers for gastroenterology
CN215153461U (en) * 2020-12-30 2021-12-14 徐媛 Multifunctional mathematical drawing tool
CN214752395U (en) * 2021-04-08 2021-11-16 重庆电子工程职业学院 Teaching aid for ideological and political theory teaching of colleges and universities
CN113085419A (en) * 2021-05-20 2021-07-09 重庆工程职业技术学院 Teaching is with supplementary drawing device
CN113199427A (en) * 2021-06-09 2021-08-03 杭州祥龙钻探设备科技股份有限公司 Assembly fixture of all-hydraulic drill chuck slips

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