CN109903639B - Teaching pole that high school chemistry teaching was used - Google Patents
Teaching pole that high school chemistry teaching was used Download PDFInfo
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- CN109903639B CN109903639B CN201910304713.XA CN201910304713A CN109903639B CN 109903639 B CN109903639 B CN 109903639B CN 201910304713 A CN201910304713 A CN 201910304713A CN 109903639 B CN109903639 B CN 109903639B
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Abstract
The invention discloses a teaching rod for high school chemistry teaching, which comprises: the body of rod, the groove has been seted up to the one end of the body of rod and has been accomodate, it has the bracing piece to accomodate inslot slidable mounting, the one end of bracing piece extends to the outside and the fixed mounting who accomodates the groove and has the rubber sleeve, the outside of rubber sleeve is around being equipped with the wire drawing, the outside top fixed mounting of rubber sleeve has the locating lever, first hole has been seted up at the top of locating lever, the both ends of wire drawing run through first hole and extend to the same traction wire of top and fixedly connected with of locating lever, the bracing piece is located the one end of accomodating the groove and sets up flutedly. According to the chalk clamp, the length of the supporting rod can be adjusted by moving the position of the sliding rod, the rubber sleeve can be tightened, the length of the teaching rod can be adjusted conveniently, a chalk can be clamped stably in the rubber sleeve, a teacher can conveniently indicate contents on a blackboard, writing at a high place is facilitated, and the chalk clamp is convenient for the teacher to use.
Description
Technical Field
The invention relates to the technical field of teaching tools, in particular to a teaching rod for high school chemistry teaching.
Background
The teaching rod is a common tool for teaching, and teachers frequently use the teaching rod to point a blackboard during teaching, explain teaching knowledge and communicate interactively. The teaching rod is one of the necessary tools for teachers to give lessons, but the existing teaching rod has single function and is difficult to bring more help to teachers to give lessons. Through search, patent document No. 201410735462.8 discloses a teaching pointer for teaching, comprising: one end of the rod body is provided with an open slot; one end of the club head is pointed, and the other end of the club head is V-shaped; the middle part of the rod head is hinged in the open slot of the rod body through a screw rod, and a locking nut is arranged on the screw rod; one end of the handle is fixedly connected with the other end of the rod body, and the other end of the handle is provided with a protective plate; the area of the radial section of the guard plate is larger than that of the radial section of the handle. The pointed end of the rod head of the teaching rod can be used for indicating blackboard contents, and the V-shaped end of the rod head can be used for supporting the ground, so that a teacher can use the teaching rod as a crutch, the teacher can rest in the course of lessons, and the work fatigue is reduced.
However, the length of the existing teaching rod is mostly unadjustable, and the chalk is inconvenient to fix on the teaching rod, so that the teaching staff is inconvenient to write teaching contents at a high place and is not beneficial to the use of the teaching staff.
Disclosure of Invention
Aiming at the problems, the invention provides a teaching rod for high school chemistry teaching, which can effectively solve the problem that the length of a common teaching rod in the background technology is inconvenient to adjust, can adjust the overall length of the teaching rod, can fix chalks on the teaching rod, and is convenient to write at a high place.
In order to achieve the purpose, the invention provides the following technical scheme:
a teaching pole of high school chemistry teaching usefulness, this teaching pole includes: the wire drawing device comprises a rod body, wherein one end of the rod body is provided with a containing groove, a supporting rod is arranged in the containing groove in a sliding mode, one end of the supporting rod extends to the outer side of the containing groove and is fixedly provided with a rubber sleeve, a drawn wire is wound on the outer side of the rubber sleeve, a positioning rod is fixedly arranged at the top of the outer side of the rubber sleeve, a first hole is formed in the top of the positioning rod, two ends of the drawn wire penetrate through the first hole, extend to the upper side of the positioning rod and are fixedly connected with the same drawing wire, one end of the supporting rod, which is located in the containing groove, is provided with a groove, two limiting rods are fixedly arranged;
set up the second hole on the top inner wall of recess, the one end that the wire drawing was kept away from to the traction wire run through the second hole extend to the recess in and with the top fixed connection of slide bar, set up threaded hole on the top inner wall of recess, screw hole internal thread installs the lead screw, the bottom of lead screw extends to in the recess and rotates with the top of slide bar to be connected, the top of lead screw extends to the top and the fixed mounting of bracing piece has the knob, the bottom welding of slide bar has the spring, and the bottom of spring welds with the bottom inner wall of recess mutually, the knob is located one side that the rubber sleeve was kept away from in the second hole, and the knob is located the outside of the body of rod, the bottom fixed mounting of slide bar has the locating lever, set up a plurality of constant head tanks with locating lever looks adaptation on the bottom inner wall in accom.
According to a preferable technical scheme of the invention, chalk is movably arranged in the rubber sleeve, and one end of the chalk extends to the outer side of the rubber sleeve.
As a preferable technical scheme, two rectangular holes which are symmetrically arranged are formed in the outer side of the rubber sleeve, and an opening is formed in one side, far away from the rod body, of each rectangular hole.
As a preferable technical scheme, the bottom of the outer side of the rubber sleeve is fixedly provided with an arc-shaped positioning plate, and the outer side of the wire drawing is movably connected with the inner side of the arc-shaped positioning plate.
As a preferable technical scheme of the invention, the same positioning shaft is rotatably arranged on the inner walls of the two sides of the first hole, and the outer side of the positioning shaft is movably contacted with the outer side of the wire drawing.
In a preferred aspect of the present invention, the same reel is rotatably mounted on both inner walls of the second hole, and the traction wire is wound around the reel.
As a preferable technical scheme, the other end of the rod body is fixedly provided with a guard plate, the top of the guard plate extends to the upper part of the rod body, and the bottom of the guard plate extends to the lower part of the rod body.
As a preferable technical scheme, the inner wall of the bottom of the groove is provided with a positioning hole matched with the positioning rod, and the bottom end of the positioning rod extends into the positioning hole and is in sliding connection with the positioning hole.
Compared with the prior art, the invention has the beneficial effects that:
the teaching rod for high school chemistry teaching is characterized in that a rod body, a containing groove, a supporting rod, a rubber sleeve, chalk, a wiredrawing rod, a positioning rod, a first hole, a traction wire, a groove, a limiting rod, a sliding rod, a second hole, a threaded hole, a screw rod and a knob are matched, the supporting rod is moved to slide in the containing groove, the extending length of the supporting rod is adjusted, when the extending length of the supporting rod is proper, the position of the supporting rod is finely adjusted, the positioning rod is positioned right above one positioning groove in a plurality of positioning grooves, the supporting rod is kept to be fixed, the chalk is inserted into the rubber sleeve, the knob is rotated to drive the screw rod to rotate in the threaded hole, and the screw rod is in threaded connection with the threaded hole and can drive the sliding rod;
through the locating lever, the constant head tank, the locating hole, a spring, the reel, the rectangular hole, the arc locating plate, location axle and backplate cooperate, the slide bar drives the reel through the traction wire and rotates when moving down, the traction wire drives the both ends of wire drawing and moves to the direction that is close to the body of rod, the wire drawing can take in the rubber sleeve this moment, can be with the firm centre gripping of chalk in the rubber sleeve, the slide bar extrudees the spring and drives the locating lever to block downwards in the corresponding constant head tank simultaneously, the position of fixed support bar, the extension length of fixed support bar, the regulation and the fixed operation to whole teaching rod length have been realized, when using this teaching rod, the educational affiliator educational staff, can instruct the content on the blackboard through the chalk, can utilize the chalk to;
according to the chalk clamp, the length of the supporting rod can be adjusted by moving the position of the sliding rod, the rubber sleeve can be tightened, the length of the teaching rod can be adjusted conveniently, a chalk can be clamped stably in the rubber sleeve, a teacher can conveniently indicate contents on a blackboard, writing at a high place is facilitated, and the chalk clamp is convenient for the teacher to use.
Drawings
FIG. 1 is a schematic structural diagram of a teaching rod for high school chemistry teaching according to the present invention;
FIG. 2 is a schematic structural diagram of part A of a teaching rod for high school chemistry teaching according to the present invention;
FIG. 3 is a schematic structural diagram of a part B of a teaching rod for high school chemistry teaching according to the present invention;
FIG. 4 is a schematic structural diagram of a portion C of a teaching rod for high school chemistry teaching according to the present invention;
fig. 5 is a schematic structural diagram of a part D of a teaching rod for high school chemistry teaching according to the present invention.
In the figure: 1-rod body, 2-accommodating groove, 3-supporting rod, 4-rubber sleeve, 5-chalk, 6-wire drawing, 7-positioning rod, 8-first hole, 9-traction wire, 10-groove, 11-limiting rod, 12-sliding rod, 13-second hole, 14-threaded hole, 15-screw rod, 16-knob, 17-positioning rod, 18-positioning groove, 19-positioning hole, 20-spring, 21-reel, 22-rectangular hole, 23-arc positioning plate, 24-positioning shaft and 25-guard plate.
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.
Example (b):
referring to fig. 1-5, the present invention provides a technical solution:
a teaching pole of high school chemistry teaching usefulness, this teaching pole includes: the novel telescopic rod comprises a rod body 1, wherein one end of the rod body 1 is provided with a containing groove 2, a supporting rod 3 is slidably mounted in the containing groove 2, one end of the supporting rod 3 extends to the outer side of the containing groove 2 and is fixedly provided with a rubber sleeve 4, the outer side of the rubber sleeve 4 is wound with a drawn wire 6, the top of the outer side of the rubber sleeve 4 is fixedly provided with a positioning rod 7, the top of the positioning rod 7 is provided with a first hole 8, two ends of the drawn wire 6 penetrate through the first hole 8 and extend to the upper part of the positioning rod 7 and are fixedly connected with the same drawing wire 9, one end of the supporting rod 3, which is positioned in the containing groove 2, is provided with a groove 10, the inner wall of the bottom of; a second hole 13 is formed in the inner wall of the top of the groove 10, one end of the traction wire 9, which is far away from the wire drawing 6, penetrates through the second hole 13, extends into the groove 10 and is fixedly connected with the top of the slide bar 12, a threaded hole 14 is formed in the inner wall of the top of the groove 10, a lead screw 15 is installed in the threaded hole 14 in a threaded manner, the bottom end of the lead screw 15 extends into the groove 10 and is rotatably connected with the top of the slide bar 12, the top end of the lead screw 15 extends above the support rod 3 and is fixedly provided with a knob 16, the bottom of the slide bar 12 is welded with a spring 20, the bottom end of the spring 20 is welded with the inner wall of the bottom of the groove 10, the knob 16 is positioned at one side of the second hole 13, which is far away from the rubber sleeve 4, the knob 16 is positioned at the outer side of the rod body 1, a positioning rod 17 is fixedly installed at the bottom, under the cooperation of a rod body 1, an accommodating groove 2, a support rod 3, a rubber sleeve 4, chalk 5, a drawing wire 6, a positioning rod 7, a first hole 8, a traction wire 9, a groove 10, a limiting rod 11, a slide rod 12, a second hole 13, a threaded hole 14, a screw rod 15 and a knob 16, the support rod 3 is moved to enable the support rod 3 to slide in the accommodating groove 2, the extension length of the support rod 3 is adjusted, when the extension length of the support rod 3 is proper, the position of the support rod 3 is finely adjusted to enable the positioning rod 17 to be positioned right above one positioning groove 18 of a plurality of positioning grooves 18, the support rod 3 is kept still, the chalk 5 is inserted into the rubber sleeve 4, the knob 16 is rotated, the knob 16 drives the screw rod 15 to rotate in the threaded hole 14, and due to the fact that the screw rod 15 is in threaded connection with the threaded; under the matching of a positioning rod 17, a positioning groove 18, a positioning hole 19, a spring 20, a reel 21, a rectangular hole 22, an arc-shaped positioning plate 23, a positioning shaft 24 and a protection plate 25, when a sliding rod 12 moves downwards, the reel 21 is driven to rotate through a traction wire 9, the traction wire 9 drives two ends of a wire drawing 6 to move towards the direction close to a rod body 1, at the moment, the wire drawing 6 can retract a rubber sleeve 4, a chalk 5 can be stably clamped in the rubber sleeve 4, meanwhile, the sliding rod 12 extrudes the spring 20 and drives the positioning rod 17 to be downwards clamped into the corresponding positioning groove 18, the position of a supporting rod 3 is fixed, the extending length of the supporting rod 3 is fixed, the length of the whole teaching rod is adjusted and fixed, when a teacher uses the teaching rod, the content on a blackboard can be indicated through the chalk 5, and the chalk 5 can be used for; according to the invention, by moving the position of the sliding rod 12, the length of the supporting rod 3 can be adjusted, the rubber sleeve 4 can be tightened, the length of the teaching rod can be conveniently adjusted, a chalk 5 can be stably clamped in the rubber sleeve 4, a teacher can conveniently indicate the content on the blackboard, writing at a high place is facilitated, and the teaching worker can conveniently use the blackboard.
The working principle of the invention is as follows: when in actual manufacturing, the outside of the supporting rod 3 can be provided with scale marks, so that the precision value of the scale marks is the same as the distance between the central axes of the adjacent two positioning grooves 18, when in use, the supporting rod 3 is firstly moved, the supporting rod 3 slides in the accommodating groove 2 to adjust the extending length of the supporting rod 3, when the extending length of the supporting rod 3 is proper, the position of the supporting rod 3 is finely adjusted, so that the positioning rod 17 is positioned right above one positioning groove 18 of the plurality of positioning grooves 18, the supporting rod 3 is kept still at the moment, the chalk 5 is inserted into the rubber sleeve 4, the knob 16 is rotated at the moment, the knob 16 drives the screw rod 15 to rotate in the threaded hole 14, as the screw rod 15 is in threaded connection with the threaded hole 14, the screw rod 14 drives the slide rod 12 to move downwards, the slide rod 12 slides downwards at the outside of the two limiting rods 11, the both ends that the haulage wire 9 drove wire drawing 6 are to the direction removal that is close to the body of rod 1, wire drawing 6 can be with rubber sleeve 4 retraction this moment, thereby can be with the firm centre gripping of chalk 5 in rubber sleeve 4, and simultaneously, slide bar 12 extrusion spring 20 drives locating lever 17 and moves down, can go into locating lever 17 card in the constant head tank 18 that corresponds, the position of fixed stay pole 3, and then the extension length of fixed bracing piece 3, realized regulation and fixed operation to whole teaching rod length, the educational administration staff is when using this teaching rod, can instruct the content on the blackboard through chalk 5, make things convenient for the short and small teacher to use of height, and can utilize chalk 5 to write at the eminence at the in-process of instructing, make things convenient for the educational administration staff to use.
In the embodiment, a chalk 5 is movably installed in the rubber sleeve 4, one end of the chalk 5 extends to the outer side of the rubber sleeve 4, two symmetrically arranged rectangular holes 22 are formed in the outer side of the rubber sleeve 4, one side of each rectangular hole 22, which is far away from the rod body 1, is provided with an opening, an arc-shaped positioning plate 23 is fixedly installed at the bottom of the outer side of the rubber sleeve 4, the outer side of the wire drawing 6 is movably connected with the inner side of the arc-shaped positioning plate 23, the same positioning shaft 24 is rotatably installed on the inner walls of two sides of the first hole 8, the outer side of the positioning shaft 24 is movably contacted with the outer side of the wire drawing 6, the same winding wheel 21 is rotatably installed on the inner walls of two sides of the second hole 13, the traction wire 9 is wound on the winding wheel 21, a guard plate 25 is fixedly installed at the other end of the rod body 1, the top of the guard plate 25 extends to the upper side, the bottom end of the positioning rod 17 extends into the positioning hole 19 and is in sliding connection with the positioning hole 19, the support rod 3 is moved under the matching of the rod body 1, the accommodating groove 2, the support rod 3, the rubber sleeve 4, the chalk 5, the drawn wire 6, the positioning rod 7, the first hole 8, the traction wire 9, the groove 10, the limiting rod 11, the slide rod 12, the second hole 13, the threaded hole 14, the lead screw 15 and the knob 16, so that the support rod 3 slides in the accommodating groove 2, the extension length of the support rod 3 is adjusted, and when the extension length of the support rod 3 is proper, finely adjusting the position of the supporting rod 3 to ensure that the positioning rod 17 is positioned right above one positioning groove 18 of the plurality of positioning grooves 18, keeping the supporting rod 3 still, inserting the chalk 5 into the rubber sleeve 4, rotating the knob 16, driving the screw rod 15 to rotate in the threaded hole 14 by the knob 16, the screw rod 15 is in threaded connection with the threaded hole 14, so that the screw rod 14 can drive the sliding rod 12 to move downwards when rotating; under the matching of a positioning rod 17, a positioning groove 18, a positioning hole 19, a spring 20, a reel 21, a rectangular hole 22, an arc-shaped positioning plate 23, a positioning shaft 24 and a protection plate 25, when a sliding rod 12 moves downwards, the reel 21 is driven to rotate through a traction wire 9, the traction wire 9 drives two ends of a wire drawing 6 to move towards the direction close to a rod body 1, at the moment, the wire drawing 6 can retract a rubber sleeve 4, a chalk 5 can be stably clamped in the rubber sleeve 4, meanwhile, the sliding rod 12 extrudes the spring 20 and drives the positioning rod 17 to be downwards clamped into the corresponding positioning groove 18, the position of a supporting rod 3 is fixed, the extending length of the supporting rod 3 is fixed, the length of the whole teaching rod is adjusted and fixed, when a teacher uses the teaching rod, the content on a blackboard can be indicated through the chalk 5, and the chalk 5 can be used for; according to the invention, by moving the position of the sliding rod 12, the length of the supporting rod 3 can be adjusted, the rubber sleeve 4 can be tightened, the length of the teaching rod can be conveniently adjusted, a chalk 5 can be stably clamped in the rubber sleeve 4, a teacher can conveniently indicate the content on the blackboard, writing at a high place is facilitated, and the teaching worker can conveniently use the blackboard.
The working principle of the invention is as follows: when in actual manufacturing, the outside of the supporting rod 3 can be provided with scale marks, so that the precision value of the scale marks is the same as the distance between the central axes of the adjacent two positioning grooves 18, when in use, the supporting rod 3 is firstly moved, the supporting rod 3 slides in the accommodating groove 2 to adjust the extending length of the supporting rod 3, when the extending length of the supporting rod 3 is proper, the position of the supporting rod 3 is finely adjusted, so that the positioning rod 17 is positioned right above one positioning groove 18 of the plurality of positioning grooves 18, the supporting rod 3 is kept still at the moment, the chalk 5 is inserted into the rubber sleeve 4, the knob 16 is rotated at the moment, the knob 16 drives the screw rod 15 to rotate in the threaded hole 14, as the screw rod 15 is in threaded connection with the threaded hole 14, the screw rod 14 drives the slide rod 12 to move downwards, the slide rod 12 slides downwards at the outside of the two limiting rods 11, the both ends that the haulage wire 9 drove wire drawing 6 are to the direction removal that is close to the body of rod 1, wire drawing 6 can be with rubber sleeve 4 retraction this moment, thereby can be with the firm centre gripping of chalk 5 in rubber sleeve 4, and simultaneously, slide bar 12 extrusion spring 20 drives locating lever 17 and moves down, can go into locating lever 17 card in the constant head tank 18 that corresponds, the position of fixed stay pole 3, and then the extension length of fixed bracing piece 3, realized regulation and fixed operation to whole teaching rod length, the educational administration staff is when using this teaching rod, can instruct the content on the blackboard through chalk 5, make things convenient for the short and small teacher to use of height, and can utilize chalk 5 to write at the eminence at the in-process of instructing, make things convenient for the educational administration staff to use.
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 (4)
1. A teaching pole of high school chemistry teaching usefulness, this teaching pole includes: the device comprises a rod body (1), wherein one end of the rod body (1) is provided with a receiving groove (2), and a supporting rod (3) is arranged in the receiving groove (2) in a sliding mode; the method is characterized in that: one end of the supporting rod (3) extends to the outer side of the accommodating groove (2) and is fixedly provided with a rubber sleeve (4), the outer side of the rubber sleeve (4) is wound with a drawn wire (6), the top of the outer side of the rubber sleeve (4) is fixedly provided with a positioning rod (7), the top of the positioning rod (7) is provided with a first hole (8), the two ends of the drawn wire (6) penetrate through the first hole (8) and extend to the upper part of the positioning rod (7) and are fixedly connected with the same drawing wire (9), one end of the supporting rod (3) located in the accommodating groove (2) is provided with a groove (10), the inner wall of the bottom of the groove (10) is fixedly provided with two limiting rods (11), and the two limiting rods (11) are slidably sleeved with the same;
the top inner wall of the groove (10) is provided with a second hole (13), one end of the traction wire (9) far away from the wire drawing (6) penetrates through the second hole (13) and extends into the groove (10) and is fixedly connected with the top of the sliding rod (12), the top inner wall of the groove (10) is provided with a threaded hole (14), a screw rod (15) is installed in the threaded hole (14), the bottom end of the screw rod (15) extends into the groove (10) and is rotatably connected with the top of the sliding rod (12), the top end of the screw rod (15) extends to the upper side of the supporting rod (3) and is fixedly provided with a knob (16), the bottom of the sliding rod (12) is welded with a spring (20), the bottom end of the spring (20) is welded with the bottom inner wall of the groove (10), the knob (16) is positioned on one side of the second hole (13) far away from the rubber sleeve (4), and the knob (16) is, a positioning rod (17) is fixedly mounted at the bottom of the sliding rod (12), a plurality of positioning grooves (18) matched with the positioning rod (17) are formed in the inner wall of the bottom of the accommodating groove (2), and the two limiting rods (11) are both positioned between the positioning rod (17) and the rubber sleeve (4);
a chalk (5) is movably arranged in the rubber sleeve (4), and one end of the chalk (5) extends to the outer side of the rubber sleeve (4);
the inner walls of the two sides of the second hole (13) are rotatably provided with the same reel (21), and the traction wire (9) is wound on the reel (21);
a protective plate (25) is fixedly mounted at the other end of the rod body (1), the top of the protective plate (25) extends to the upper part of the rod body (1), and the bottom of the protective plate (25) extends to the lower part of the rod body (1);
the inner wall of the bottom of the groove (10) is provided with a positioning hole (19) matched with the positioning rod (17), and the bottom end of the positioning rod (17) extends into the positioning hole (19) and is in sliding connection with the positioning hole (19).
2. The teaching pole for high school chemistry teaching according to claim 1, wherein: two rectangular holes (22) symmetrically arranged are formed in the outer side of the rubber sleeve (4), and an opening is formed in one side, away from the rod body (1), of each rectangular hole (22).
3. The teaching pole for high school chemistry teaching according to claim 1, wherein: the outer side bottom of the rubber sleeve (4) is fixedly provided with an arc-shaped positioning plate (23), and the outer side of the wire drawing (6) is movably connected with the inner side of the arc-shaped positioning plate (23).
4. The teaching pole for high school chemistry teaching according to claim 1, wherein: the inner walls of the two sides of the first hole (8) are rotatably provided with the same positioning shaft (24), and the outer side of the positioning shaft (24) is movably contacted with the outer side of the wire drawing (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910304713.XA CN109903639B (en) | 2019-04-16 | 2019-04-16 | Teaching pole that high school chemistry teaching was used |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910304713.XA CN109903639B (en) | 2019-04-16 | 2019-04-16 | Teaching pole that high school chemistry teaching was used |
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| Publication Number | Publication Date |
|---|---|
| CN109903639A CN109903639A (en) | 2019-06-18 |
| CN109903639B true CN109903639B (en) | 2020-10-30 |
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| CN201910304713.XA Active CN109903639B (en) | 2019-04-16 | 2019-04-16 | Teaching pole that high school chemistry teaching was used |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111489613B (en) * | 2020-04-24 | 2022-01-28 | 河南工学院 | Education and teaching prevents thoughtlessly using individual teaching device of teacher |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103600598B (en) * | 2013-11-26 | 2015-10-28 | 河海大学常州校区 | A kind of multi-function chalk casing |
| CN205508196U (en) * | 2015-12-04 | 2016-08-24 | 哈尔滨华德学院 | Dual -purpose teacher's pointer |
| CN206067295U (en) * | 2016-07-06 | 2017-04-05 | 李小英 | A kind of multi-function chalk casing |
| CN108016162A (en) * | 2016-11-03 | 2018-05-11 | 中国石油广安希望学校 | Chalk clip for teaching |
| CN108859518B (en) * | 2018-06-15 | 2020-11-06 | 闫志忠 | Drawing auxiliary mechanism for mathematical education |
| CN108847087B (en) * | 2018-07-23 | 2020-06-02 | 山东理工职业学院 | A multi-functional teaching pole for university's teaching |
| CN109263361A (en) * | 2018-10-08 | 2019-01-25 | 凡得雨 | A kind of multifunctional pen for white board |
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