Root combination teaching aid

Abstract

The invention relates to the technical field of English teaching, and particularly discloses a word root combined teaching aid, which comprises a supporting turnover mechanism, a movable plate trailer, a teaching mechanism and a teaching mechanism, the word grouping mechanisms are arranged in the supporting turnover mechanism, and the number of the word grouping mechanisms is four, and the word grouping mechanisms are used for placing word roots; and the display playing mechanism is arranged on one side of the word combination mechanism, and the display playing mechanism is used for playing teaching words, displaying correctness of word combination and playing music after successful combination. And turning work can be performed after a user completes word combination successfully, so that the next word combination teaching can be performed in time.

Description

Technical Field

[0001] The invention relates to the technical field of English teaching, in particular to a root combination teaching aid. Background Art

[0002] In English teaching, roots are needed to facilitate the teaching of English words. Multiple English letters are combined into English words through word formation rules for arrangement and combination. However, the existing root teaching aids only have the function of word formation when used, and most of the users who use roots to learn English are young. The whole use process is too boring and tedious. The repetitive action is to find the correct root to form words, which makes it difficult to achieve the effect of teaching in an entertaining way. Moreover, users cannot confirm the correctness of the words after forming them, which results in the need to see the correct answer before distinguishing, thereby reducing the significance of teaching. For this reason, we propose a root combination teaching aid. Summary of the invention

[0003] The purpose of the present invention is to provide a root combination teaching aid to solve the problem raised in the above background technology. However, the existing root teaching aids only have the function of word combination when used, and most of the users who use roots to learn English are young. The whole use process is too boring and tedious. The action that is repeated all the time is to find the correct root to combine words, which makes it difficult to achieve the effect of teaching while entertaining. Moreover, when combining words, users cannot confirm the correctness of the combined words, which results in the need to see the correct answer before making a distinction, thereby reducing the teaching significance.

[0004] To achieve the above object, the present invention provides the following technical solution: a root combination teaching aid, comprising:

[0005] A supporting flipping mechanism, which is arranged on the top of the mobile cart and is used to install the teaching mechanism;

[0006] A word-forming mechanism, which is arranged inside the supporting flipping mechanism, and there are four word-forming mechanisms, which are used to place word roots;

[0007] A display and playback mechanism is arranged on one side of the word formation mechanism, and is used to play the teaching words and display the correctness of the word formation and play music after the formation is successful;

[0008] A prompting mechanism is arranged on one side of the word forming mechanism, and is used to prompt when the user fails to form a word with a single letter root three times;

[0009] The magnetic recognition mechanism is arranged inside the supporting flip mechanism, and the magnetic recognition mechanism is used to identify the magnet level strength.

[0010] The supporting turning mechanism comprises two supporting plates fixedly connected to the top of the moving pallet truck, and the inside of the two supporting plates is rotatably connected with a turning cylinder.

[0011] Among them, the word-forming mechanism includes four placement fixing plates which are equidistantly fixedly connected to the inside of the support plate, four placement grooves are opened inside the four placement fixing plates, a first magnet is fixedly connected to the inner wall of the placement groove, a first slide groove is opened inside the placement fixing plate and inside the first magnet, a first spring is fixedly connected to one side of the inner wall of the first slide groove, an elliptical block is fixedly connected to one side of the first spring, and a touch counter is fixedly connected to one side of the inner wall of the first slide groove and inside the first spring.

[0012] The display and playback mechanism comprises a playback display fixedly connected to one side of the fixed plate, and a plurality of traffic lights are fixedly connected to the playback display at equal distances to one side away from the fixed plate.

[0013] Among them, the prompt mechanism includes a fixed plate fixedly connected to one side of the placement fixing plate, a flip prompt display is rotatably connected to the inside of the fixed plate and located on one side of the placement groove, a gear is fixedly connected to one side of the flip prompt display and located in the fixed plate, one side of the gear is meshingly connected with a rack, a second limit slider is fixedly connected to the side of the rack away from the gear, a limit slot matching the second limit slider is provided inside the fixed plate, a fourth spring is fixedly connected to one side of the second limit slider, and the fourth spring is fixedly connected to the fixed plate on the side away from the second limit slider, a second magnet is fixedly connected to one side of the second limit slider, and an electromagnet is fixedly connected to one side of the inner wall of the limit slot.

[0014] The magnetic identification mechanism comprises a magnetic detector fixedly connected to the inside of the flip cylinder, a probe is arranged on one side of the magnetic detector, and an external magnetic-insulating sleeve is arranged outside the probe and inside the flip cylinder.

[0015] Among them, it also includes a fixed-distance flipping mechanism, which is arranged on one side of the supporting flipping mechanism and is used for fixed-distance flipping work. The fixed-distance flipping mechanism includes a first motor fixedly connected to one side of the supporting plate, the output end of the first motor is fixedly connected to a first turntable, the outer side of the first turntable is fixedly connected to four fixed-distance blocks, a second turntable is fixedly connected to one side of the flipping cylinder, and the interior of the second turntable is provided with a fixed-distance groove that matches the fixed-distance block.

[0016] Among them, it also includes a separation mechanism, which is arranged inside the supporting flipping mechanism. The separation mechanism is used to push out the root word to facilitate subsequent word formation teaching. The separation mechanism includes two second springs fixedly connected to the inner side of the support plate, one side of the two second springs is fixedly connected to a driving plate, one side of the driving plate and located in the placement groove is fixedly connected to two separation rods, one side of the driving plate is fixedly connected to a trapezoidal block, the inside of the flip cylinder and located on one side of the driving plate are fixedly connected to two limit rods, the two limit rods are slidably connected to a first limit slider, the outside of the limit rod and located on one side of the first limit slider is sleeved with a third spring, an elliptical rod plate is fixedly connected between the two first limit sliders, the inside of the elliptical rod plate is rotatably connected to a roller, and one side of the two support plates is fixedly connected to a triangular block.

[0017] The magnetic poles of the electromagnet facing the second magnet are opposite.

[0018] Wherein, a storage box is arranged on the top of the mobile cart and directly below the word forming mechanism.

[0019] The present invention has at least the following beneficial effects:

[0020] By providing a supporting flipping mechanism, the user can turn over the surface after successfully forming a word, so that the next level of word formation teaching can be carried out in time. The display and playback mechanism can be used to cooperate with the controller to control the display of word translation, and play celebration music after the successful completion of word formation. At the same time, the music for passing the level can be played when the word formation is being carried out, which helps to attract the user's attention and create an atmosphere. At the same time, the display and playback mechanism cooperates with the magnetic recognition mechanism to form word letters, and the correctness of the letters is identified when the user places the word root, so that no additional personnel is required to check the recognition accuracy. The word formation mechanism and the prompt mechanism can be used to place the word root. At the same time, the prompt mechanism can be used to prompt the user when the correct word root cannot be placed for three times. The word formation mechanism, the prompt mechanism, the display and playback mechanism and the magnetic recognition mechanism are electrically connected in a system, and controlled by a programming operation controller, so as to achieve a level-breaking educational and entertaining effect. The correctness of the word formation can be identified by the size of the magnetic force, so that the identification can be completed in the first time, and the teaching effect is guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 It is a schematic diagram of the overall structure of the present invention from a side view;

[0023] Figure 3 This is a schematic diagram of the internal structure of the turning cylinder of the present invention;

[0024] Figure 4It is a structural schematic diagram of the word-forming mechanism of the present invention;

[0025] Figure 5 For the present invention Figure 4 The enlarged structural diagram at A in the middle;

[0026] Figure 6 It is a front view structural schematic diagram of the separation mechanism of the present invention;

[0027] Figure 7 It is a rear view structural schematic diagram of the separation mechanism of the present invention;

[0028] Figure 8 It is a schematic diagram of the internal structure of the prompting mechanism of the present invention;

[0029] Fig. 9 For the present invention Figure 8 The enlarged structural diagram at B in the middle;

[0030] Fig.10 It is a structural schematic diagram of the display and playback mechanism of the present invention;

[0031] Fig.11 It is a structural schematic diagram of the magnetic recognition mechanism of the present invention;

[0032] Fig.12 This is a schematic diagram of the structure of the flip prompt display and gears of the present invention;

[0033] Fig.13 It is a structural schematic diagram of the fixed-distance flipping mechanism of the present invention;

[0034] Fig.14 It is a structural schematic diagram of the triangular block of the present invention.

[0035] In the figure: 1, moving cart; 2, fixed distance turning mechanism; 21, first motor; 22, first turntable; 23, second turntable; 24, fixed distance block; 25, fixed distance slot; 3, supporting turning mechanism; 31, supporting plate; 32, turning cylinder; 4, word forming mechanism; 41, placing fixing plate; 42, placing slot; 43, first magnet; 44, first slide slot; 45, first spring; 46, elliptical block; 47, touch counter; 5, separation mechanism; 51, second spring; 52, driving plate; 53, separation rod; 54, limit rod; 55 , the first limit slider; 56, the third spring; 57, the elliptical rod plate; 58, the roller; 59, the trapezoidal block; 590, the triangular block; 6, the display and playback mechanism; 61, the playback display; 62, the traffic light; 7, the prompt mechanism; 71, the fixed plate; 72, the flip prompt display; 73, the gear; 74, the limit slide; 75, the second limit slider; 76, the rack; 77, the fourth spring; 78, the electromagnet; 79, the second magnet; 8, the magnetic recognition mechanism; 81, the magnetic detector; 82, the external magnetic-insulating sleeve; 83, the probe. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] Embodiment 1

[0038] See also Figures 1 to 14 The present invention provides a technical solution: a root combination teaching aid, comprising:

[0039] A supporting flipping mechanism 3, which is arranged on the top of the mobile cart 1 and is used to install the teaching mechanism;

[0040] The word-forming mechanism 4 is arranged inside the supporting flipping mechanism 3, and there are four word-forming mechanisms 4, which are used to place word roots;

[0041] A display and playback mechanism 6 is arranged on one side of the word formation mechanism 4, and is used to play the teaching words and display the correctness of the word formation and play music after the formation is successful;

[0042] The prompting mechanism 7 is arranged on one side of the word forming mechanism 4, and is used to prompt the user when the user fails to form a word with a single letter root three times;

[0043] A magnetic identification mechanism 8, which is disposed inside the supporting flip mechanism 3 and is used to identify the magnet level strength;

[0044] The above-mentioned supporting flipping mechanism 3 is provided, so that the user can turn over the surface after the word formation is successfully completed, and the next level of word formation teaching can be carried out in time. The display and playback mechanism 6 can be used to cooperate with the controller to control the display of word translation, and the celebration music can be played after the word formation is successfully completed. At the same time, the music for passing the level can be played when the word formation is being carried out, which helps to attract the user's attention and create an atmosphere. At the same time, the display and playback mechanism 6 cooperates with the magnetic recognition mechanism 8 to form word letters, and the correctness of the letters is identified when the user places the root word, and no additional personnel are required to check the recognition accuracy. The word formation mechanism 4 and the prompt mechanism 7 can be used to place the root word. At the same time, the prompt mechanism 7 can be used to prompt the user when the correct root word cannot be placed three times. The word formation mechanism 4, the prompt mechanism 7, the display and playback mechanism 6 and the magnetic recognition mechanism 8 are electrically connected to the system, and the controller is controlled by programming operation, so as to achieve the effect of teaching through entertainment. The correctness of the word formation can be identified by the size of the magnetic force, so that the identification can be completed in the first time, and the teaching effect is guaranteed.

[0045] When in use, the 26 English letters of the root are sequentially enhanced in magnetic strength, and multiple groups of 26 English letters can be used for matching when repeated letters appear in four words, and then the translated words are displayed through the display and playback mechanism 6, and the magnetic roots corresponding to the four letters of the word are placed through the word formation mechanism 4. The magnetic root can be identified by the magnetic recognition mechanism 8. If the letter is wrong, the display and playback mechanism 6 will display green light, and the error will display red light. When the error reaches three times, the correct letter will be displayed through the prompt mechanism 7. After the word formation is successful, the display and playback mechanism 6 will play celebration music, and then the next level of word formation will be carried out;

[0046] The supporting flipping mechanism 3 includes two supporting plates 31 fixedly connected to the top of the mobile cart 1, and the inside of the two supporting plates 31 is rotatably connected to a flipping cylinder 32. When in use, the supporting plates 31 can be used to support the flipping cylinder 32, and the flipping work can be performed through the flipping cylinder 32;

[0047] The word forming mechanism 4 includes four placement fixing plates 41 fixedly connected to the inside of the support plate 31 at equal distances, four placement slots 42 are provided inside the four placement fixing plates 41, a first magnet 43 is fixedly connected to the inner wall of the placement slot 42, a first slide slot 44 is provided inside the placement fixing plates 41 and inside the first magnet 43, a first spring 45 is fixedly connected to one side of the inner wall of the first slide slot 44, an elliptical block 46 is fixedly connected to one side of the first spring 45, and a touch counter 47 is fixedly connected to one side of the inner wall of the first slide slot 44 and inside the first spring 45;

[0048] When in use, the magnetic root is placed in the placement slot 42 and adsorbed by the first magnet 43. When the magnetic root is placed on one side of the first magnet 43, it touches the elliptical block 46, so that the elliptical block 46 slides in the first slide slot 44 to compress the first spring 45, and then the moving elliptical block 46 touches the touch counter 47. The touch counter 47 is controlled by the controller to set the number of touches to three times, and the information is fed back to the controller after the touch counter 47 is touched three times.

[0049] The display and playback mechanism 6 includes a playback display 61 fixedly connected to one side of the placement fixing plate 41, and a plurality of traffic lights 62 are fixedly connected to the playback display 61 at equal distances from the side of the placement fixing plate 41. When in use, the playback display 61 is controlled by a controller to display the translation, and when an error occurs in placing the magnetic root, information is fed back to the controller, and the controller controls the traffic light 62 to display a red light, and when the magnetic root is placed correctly, the traffic light 62 displays a green light;

[0050] The prompt mechanism 7 includes a fixed plate 71 fixedly connected to one side of the placement fixing plate 41, a flip prompt display 72 is rotatably connected inside the fixed plate 71 and located on one side of the placement groove 42, a gear 73 is fixedly connected to one side of the flip prompt display 72 and located inside the fixed plate 71, a rack 76 is meshedly connected to one side of the gear 73, a second limiting slider 75 is fixedly connected to the side of the rack 76 away from the gear 73, a limiting slide groove 74 matching the second limiting slider 75 is provided inside the fixed plate 71, a fourth spring 77 is fixedly connected to one side of the second limiting slider 75, and the fourth spring 77 is fixedly connected to the fixed plate 71 on one side away from the second limiting slider 75, a second magnet 79 is fixedly connected to one side of the second limiting slider 75, and an electromagnet 78 is fixedly connected to one side of the inner wall of the limiting slide groove 74;

[0051] When in use, when the word formation is wrong three times, the electromagnet 78 at the required letter position is energized, and the controller controls the electromagnet 78 to be energized to attract the second magnet 79, so that the second magnet 79 drives the second limit slider 75 to slide in the limit slide groove 74 to compress the fourth spring 77, and when the second limit slider 75 moves, it drives the rack 76 to move, so that the rack 76 drives the gear 73 to flip, and the maximum movement distance of the rack 76 is equal to half the circumference of the gear 73, so that the flip prompt display 72 can be flipped, and the controller controls the flip prompt display 72 to cooperate with the display and playback mechanism 6 to display the correct letter;

[0052] The magnetic recognition mechanism 8 includes a magnetic detector 81 fixedly connected to the inside of the flip cylinder 32, a probe 83 is provided on one side of the magnetic detector 81, and an external magnetic-proof sleeve 82 is provided on the outside of the probe 83 and located in the flip cylinder 32. When in use, the external magnetic-proof sleeve 82 is provided on the outside of the probe 83 to prevent the probe 83 from being infected by external magnetic force. The probe 83 is connected to the magnetic detector 81 to identify the level of the root and thus identify the correctness of the correct root letter.

[0053] The fixed-distance flipping mechanism 2 is also included. The fixed-distance flipping mechanism 2 is provided on one side of the supporting flipping mechanism 3 and is used for fixed-distance flipping. The fixed-distance flipping mechanism 2 includes a first motor 21 fixedly connected to one side of the supporting plate 31, a first rotating disk 22 is fixedly connected to the output end of the first motor 21, four fixed-distance blocks 24 are fixedly connected to the outer side of the first rotating disk 22, a second rotating disk 23 is fixedly connected to one side of the flipping cylinder 32, and a fixed-distance groove 25 matching the fixed-distance block 24 is opened inside the second rotating disk 23;

[0054] When in use, the operation controller controls the first motor 21 to rotate the first rotating disk 22, so that the first rotating disk 22 cooperates with the spacing groove 25 in the second rotating disk 23 through the spacing block 24 on the outside, thereby driving the turning cylinder 32 to rotate at a quarter of a circle at a fixed distance;

[0055] The separating mechanism 5 is also included, and the separating mechanism 5 is arranged inside the supporting flipping mechanism 3. The separating mechanism 5 is used to push out the root word, so as to facilitate the subsequent word formation teaching. The separating mechanism 5 includes two second springs 51 fixedly connected to the inner side of the supporting plate 31, one side of the two second springs 51 is fixedly connected to a driving plate 52, one side of the driving plate 52 and located in the placement groove 42 is fixedly connected with two separating rods 53, one side of the driving plate 52 is fixedly connected with a trapezoidal block 59, the inside of the flipping cylinder 32 and located on one side of the driving plate 52 are fixedly connected with two limiting rods 54, the two limiting rods 54 are slidably connected with a first limiting slider 55, the outer side of the limiting rod 54 and located on one side of the first limiting slider 55 are sleeved with a third spring 56, an elliptical rod plate 57 is fixedly connected between the two first limiting sliders 55, and a roller 58 is rotatably connected inside the elliptical rod plate 57, and a triangular block 590 is fixedly connected to one side of the two supporting plates 31;

[0056] During use, when the second limit slider 75 touches the triangular block 590, it will push the elliptical rod plate 57 to drive the two first limit sliders 55 to move on the outside of the limit rod 54, so that the moving first limit slider 55 compresses the third spring 56, and when the elliptical rod plate 57 drives the internal roller 58 to roll on the outside of the trapezoidal block 59, it will push the driving plate 52 to move, so that the moving driving plate 52 compresses the second spring 51, and when the driving plate 52 moves, the magnetic stem can be pushed out through the separation rod 53, so that the pushed out magnetic stem falls into the storage box.

[0057] Embodiment 2

[0058] like Figure 1-9 In the second embodiment, other structures remain unchanged, and the difference from the first embodiment is

[0059] The magnetic poles of the electromagnet 78 and the second magnet 79 facing each other are opposite, which can ensure that the second magnet 79 is attracted and approached immediately when the electromagnet 78 is energized, thereby completing the flipping operation;

[0060] A storage box is provided on the top of the mobile cart 1 and directly below the word forming mechanism 4. The storage box can be used to store word roots, thereby facilitating the user to find the desired word roots and collect the used word roots.

[0061] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0062] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A root combination teaching aid, characterized in that: include: A supporting and flipping mechanism (3), wherein the supporting and flipping mechanism (3) is arranged on the top of the mobile cart (1), and the supporting and flipping mechanism (3) is used to install the teaching mechanism; A word-forming mechanism (4), wherein the word-forming mechanism (4) is arranged inside the supporting flipping mechanism (3), and the number of the word-forming mechanisms (4) is four and is used for placing word roots; A display and playback mechanism (6), the display and playback mechanism (6) is arranged on one side of the word formation mechanism (4), and the display and playback mechanism (6) is used to play the teaching words and display the correctness of the word formation and play music after the formation is successful; A prompting mechanism (7), the prompting mechanism (7) being arranged on one side of the word forming mechanism (4), and the prompting mechanism (7) being used to prompt a user when the user fails to form a word with a single letter root three times; A magnetic recognition mechanism (8) is arranged inside the supporting flip mechanism (3), and the magnetic recognition mechanism (8) is used to identify the level strength of the magnet.

2. The root combination teaching aid according to claim 1, characterized in that: The supporting and turning mechanism (3) comprises two supporting plates (31) fixedly connected to the top of the moving pallet truck (1), and a turning cylinder (32) is rotatably connected inside the two supporting plates (31).

3. The root combination teaching aid according to claim 2, characterized in that: The word-forming mechanism (4) comprises four placement fixing plates (41) fixedly connected to the inside of the support plate (31) at equal distances, four placement slots (42) are provided inside the four placement fixing plates (41), the inner walls of the placement slots (42) are fixedly connected to first magnets (43), a first slide slot (44) is provided inside the placement fixing plates (41) and inside the first magnets (43), a first spring (45) is fixedly connected to one side of the inner wall of the first slide slot (44), an elliptical block (46) is fixedly connected to one side of the first spring (45), and a touch counter (47) is fixedly connected to one side of the inner wall of the first slide slot (44) and inside the first spring (45).

4. The root combination teaching aid according to claim 3, characterized in that: The display and playback mechanism (6) comprises a playback display (61) fixedly connected to one side of the placement fixing plate (41), and a plurality of traffic lights (62) are fixedly connected to the side of the playback display (61) away from the placement fixing plate (41) at equal distances.

5. The root combination teaching aid according to claim 3, characterized in that: The prompt mechanism (7) comprises a fixed plate (71) fixedly connected to one side of the placement fixing plate (41); a flip prompt display (72) is rotatably connected inside the fixed plate (71) and located on one side of the placement groove (42); a gear (73) is fixedly connected to one side of the flip prompt display (72) and located inside the fixed plate (71); a rack (76) is meshedly connected to one side of the gear (73); and a second limiter is fixedly connected to the side of the rack (76) away from the gear (73). A slider (75), a limiting slide groove (74) matching with the second limiting slider (75) is provided inside the fixed plate (71), a fourth spring (77) is fixedly connected to one side of the second limiting slider (75), and the fourth spring (77) is fixedly connected to the fixing plate (71) on the side away from the second limiting slider (75), a second magnet (79) is fixedly connected to one side of the second limiting slider (75), and an electromagnet (78) is fixedly connected to one side of the inner wall of the limiting slide groove (74).

6. The root combination teaching aid according to claim 2, characterized in that: The magnetic identification mechanism (8) comprises a magnetic detector (81) fixedly connected to the inside of the turning cylinder (32), a probe (83) is arranged on one side of the magnetic detector (81), and an external magnetic-insulating sleeve (82) is arranged outside the probe (83) and inside the turning cylinder (32).

7. The root combination teaching aid according to claim 2, characterized in that: The invention also comprises a fixed-distance flipping mechanism (2), the fixed-distance flipping mechanism (2) being arranged on one side of the supporting flipping mechanism (3), and the fixed-distance flipping mechanism (2) being used for fixed-distance flipping work, the fixed-distance flipping mechanism (2) comprising a first motor (21) fixedly connected to one side of a supporting plate (31), the output end of the first motor (21) being fixedly connected to a first rotating disk (22), the outer side of the first rotating disk (22) being fixedly connected to four fixed-distance blocks (24), the one side of the flipping cylinder (32) being fixedly connected to a second rotating disk (23), the interior of the second rotating disk (23) being provided with a fixed-distance groove (25) matching with the fixed-distance block (24).

8. The root combination teaching aid according to claim 3, characterized in that: The invention also comprises a separation mechanism (5), wherein the separation mechanism (5) is arranged inside the supporting and flipping mechanism (3), and the separation mechanism (5) is used to push out the root word to facilitate the subsequent word formation teaching, and the separation mechanism (5) comprises two second springs (51) fixedly connected to the inner side of the supporting plate (31), one side of the two second springs (51) is fixedly connected to a driving plate (52), one side of the driving plate (52) is fixedly connected to two separation rods (53) located in the placement groove (42), and one side of the driving plate (52) is fixedly connected to a trapezoidal block (59). ), two limit rods (54) are fixedly connected inside the flip cylinder (32) and located on one side of the driving plate (52), the two limit rods (54) are slidably connected with a first limit slider (55), a third spring (56) is sleeved on the outside of the limit rod (54) and located on one side of the first limit slider (55), an elliptical rod plate (57) is fixedly connected between the two first limit sliders (55), a roller (58) is rotatably connected inside the elliptical rod plate (57), and a triangular block (590) is fixedly connected to one side of the two support plates (31).

9. The root combination teaching aid according to claim 5, characterized in that: The electromagnet (78) and the second magnet (79) have opposite magnetic poles on a surface facing each other.

10. The root combination teaching aid according to claim 1, characterized in that: A storage box is provided on the top of the mobile cart (1) and directly below the word-forming mechanism (4).

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