Exercise book with myopia prevention and sitting posture correction assisting functions

Abstract

The exercise book with the myopia prevention and sitting posture correction assisting functions comprises a shell, the shell is divided into an upper shell body and a lower shell body, a plurality of pieces of writing paper are arranged between the upper shell body and the lower shell body, a distance measuring mechanism is arranged on the surface of the upper shell body, and the distance measuring mechanism is perpendicular to the lower edge line of the upper shell body. According to the exercise book with the myopia prevention and sitting posture correction assisting functions, by arranging an inclined strip, a winding mechanism and a distance measuring mechanism, after the exercise book is placed neatly, a distance measuring clamping strip is pulled, the distance between the exercise book and the body is measured, then the distance between the exercise book and the body is adjusted, the distance measuring clamping strip is loosened after adjustment is completed, a clockwork spring drives a winding wheel to rotate, and then the exercise book is fixed. The winding wheel winds the connecting rope, and the connecting rope pulls the connecting block and the distance measuring clamping strip to return to the original position.

Description

Technical Field

[0001] The utility model relates to the technical field of exercise books, in particular to an exercise book with the functions of preventing myopia and assisting in correcting sitting posture. Background Art

[0002] A workbook refers to a notebook used by students or other learners to do homework and an exercise book that usually serves as an auxiliary teaching material.

[0003] After searching, the existing patent (publication number: CN210970409U) discloses a new type of eye protection exercise book, including a hard cover page and an inner page, the inner page is located inside the hard cover page, the hard cover page and the left side of the inner page are bonded by an adhesive layer, the front and rear side walls of the hard cover page are longitudinally provided with folds on the side close to the adhesive layer, and the inner page adopts inner page paper made of eye protection material. The inner page paper made of eye protection material can initially protect the eyes; warning strips are set on each inner page, so that students can be reminded in real time, and the prompt content is more eye-catching than the directly printed prompt content, which improves students' attention to it; through the setting of the prompt label box, every time the student uses it, he will get a reminder from the hard cover page immediately. Through the reminder effect in multiple places, students can quickly form good habits under the effect of warnings.

[0004] It can provide real-time prompts to students by setting warning strips on an inner page, and the prompt content is more eye-catching than the directly printed prompt content, so that students can quickly form good habits under the effect of the warning. However, it has its shortcomings. Students have no reference objects to maintain good habits, and their self-exploring learning posture is not very formal. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides an exercise book with the functions of preventing myopia and assisting in correcting sitting posture. By arranging a distance measuring mechanism, the sitting posture of students can be effectively corrected.

[0006] To achieve the above objectives, the utility model is implemented through the following technical solutions: a workbook with anti-myopia and auxiliary sitting posture correction functions, including a shell, the shell is divided into an upper shell and a lower shell, a plurality of writing papers are arranged between the upper shell and the lower shell, and a distance measuring mechanism is provided on the surface of the upper shell, and the distance measuring mechanism is arranged perpendicular to the lower edge line of the upper shell.

[0007] The utility model is also characterized in that:

[0008] The distance measuring mechanism includes a connecting block, a distance measuring card strip and a fixed shell. The fixed shell is fixed on the upper shell body. The connecting block is arranged in the fixed shell and is slidably connected with the fixed shell. A rotating rod is arranged in the connecting block. The distance measuring card strip and a connecting rope are respectively arranged at both ends of the rotating rod. A scale is arranged on the distance measuring card strip.

[0009] A slot is provided on the connecting block, and clamping holes are provided at both ends of the slot. Two storage tubes are also provided on the connecting block, and the two storage tubes are respectively embedded in both sides of the slot. A spring is provided in each storage tube, one end of the spring is fixed in the storage tube, and the other end passes through the storage tube and is provided with a clamping block. Each clamping block is respectively clamped into the clamping hole corresponding to it, and the bottom of the ranging card strip is fixed on the clamping block, and the ranging card strip moves as the connecting block slides in the fixed shell.

[0010] A speed limiting mechanism and a winding mechanism are also provided on the upper shell body. The speed limiting mechanism includes a fixed cylinder, which is arranged at the upper end of the upper shell body and is connected to the distance measuring mechanism. Two iron rings are arranged inside the fixed cylinder. The inner side walls of the two iron rings are rotatably connected with magnetic rings. A round rod is arranged in each magnetic ring. A rotating wheel is sleeved on each round rod. The connecting rope passes through the distance measuring mechanism and enters the speed limiting mechanism and is arranged between the two round rods.

[0011] The winding mechanism includes a cylinder, which is arranged at the upper end of the upper shell body. A fixed block is arranged inside the cylinder. A spring and a winding wheel are arranged from the inside to the outside along the circumference of the fixed block. One end of the spring is fixed to the outer wall of the fixed block, and the other end of the spring is connected to the winding wheel. The connecting rope passes through the speed limiting mechanism and is fixed on the outer wall of the winding wheel.

[0012] An umbrella-shaped groove is provided on the writing paper, a plurality of inclined strips are fixed inside the umbrella-shaped groove, and patterns are drawn on the upper inclined surfaces of the inclined strips.

[0013] The writing paper and the inclined strips are both yellow in color, which can reflect light with a wavelength of 460 to 510 nm and show a brightness of 54% to 58%. The surface of the writing paper is printed with writing separators, which are cyan, green or black.

[0014] A housing cover is also provided outside the upper housing to protect the distance measuring mechanism, the speed limiting mechanism and the winding mechanism.

[0015] Beneficial effects:

[0016] The utility model provides an exercise book with the functions of preventing myopia and assisting in correcting sitting posture. Compared with the prior art, it has the following beneficial effects:

[0017] (1) A workbook with the function of preventing myopia and assisting in correcting sitting posture is provided with a tilting bar, a winding mechanism and a distance measuring mechanism. After the workbook is neatly placed, the distance measuring card strip is pulled to measure the distance between the workbook and the body, and then the distance between the workbook and the body is adjusted. After the adjustment is completed, the distance measuring card strip is released, and the winding spring drives the winding wheel to rotate, and the winding wheel winds up the connecting rope. The connecting rope pulls the connecting block and the distance measuring card strip back to their original positions, and then the shell is opened, and the eyes look at the tilting bar and the pattern on the tilting bar. If the pattern cannot be seen, the angle of the head is adjusted so that the pattern can be seen. This can assist in sitting posture and keep the head away from the workbook to protect the eyes. The color of the writing paper and the tilting bar is yellow, and the writing separation strip is cyan. This has less stimulation to the eyes and helps protect eyesight.

[0018] (2) This exercise book with the functions of preventing myopia and assisting in correcting sitting posture has a speed limiting mechanism. The winding wheel is driven by a spring to rotate. The winding wheel reels in a connecting rope. The connecting rope moves to rotate the two rotating wheels. The rotating wheels drive the round rod and the magnetic ring to rotate. The magnetic ring and the iron ring attract each other, thereby increasing the difficulty of the round rod and the rotating wheel, slowing down the rotation speed of the rotating wheel. The rotating wheel slows down the movement of the connecting rope through friction, thereby preventing the distance measuring card strip from moving too fast and causing injury. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the structure of an exercise book with the function of preventing myopia and assisting in correcting sitting posture. Figure 1 ;

[0020] Figure 2 This is a schematic diagram of the structure of an exercise book with the function of preventing myopia and assisting in correcting sitting posture. Figure 2 ;

[0021] Figure 3 This is a side view structural diagram of an exercise book with the functions of preventing myopia and assisting in correcting sitting posture according to the utility model;

[0022] Figure 4 This is a schematic cross-sectional view of the utility model of an exercise book with the functions of preventing myopia and assisting in correcting sitting posture;

[0023] Figure 5 This is a schematic cross-sectional view of the utility model of an exercise book with the functions of preventing myopia and assisting in correcting sitting posture;

[0024] Figure 6 This is a schematic cross-sectional structure diagram of an exercise book with the functions of preventing myopia and assisting in correcting sitting posture according to the utility model;

[0025] Figure 7 This is a schematic diagram of the structure of the groove and the tilting strip in the exercise book with the functions of preventing myopia and assisting in correcting sitting posture according to the utility model;

[0026] Figure 8 This is a structural schematic diagram of a distance measuring card strip in an exercise book with the functions of preventing myopia and assisting in correcting sitting posture according to the utility model;

[0027] Fig. 9 The utility model is a work with the function of preventing myopia and assisting in correcting sitting posture. The schematic diagram of the distance measuring mechanism structure in the embodiment 1;

[0028] In the figure: 1. speed limiting mechanism; 2. winding mechanism; 3. distance measuring mechanism; 4. shell; 4-1. upper shell; 4-2. lower shell; 5. writing paper; 6. tilting strip; 7. cylinder; 8. connecting rope; 9. fixing block; 10. spring; 11. winding wheel; 12. fixing cylinder; 13. rotating wheel; 14. magnetic ring; 15. iron ring; 16. round rod; 17. clamping hole; 18. spring; 19. distance measuring clamping strip; 20. slot; 21. shell cover; 22. rotating rod; 23. umbrella-shaped groove; 24. storage cylinder; 25. clamping block; 26. connecting block; 27. fixing shell; 28. scale. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] Example 1

[0031] A workbook with the functions of preventing myopia and assisting in correcting sitting posture, the specific structure is as follows Figure 1 and Figure 2 As shown, it includes a shell 4, which is divided into an upper shell 4-1 and a lower shell 4-2. A plurality of writing papers 5 are arranged between the upper shell 4-1 and the lower shell 4-2. A distance measuring mechanism 3 is arranged on the surface of the upper shell 4-1, and the distance measuring mechanism 3 is arranged perpendicular to the lower edge of the upper shell 4-1.

[0032] like Figure 8 and Fig. 9 As shown, the distance measuring mechanism 3 includes a connecting block 26, a distance measuring card strip 19 and a fixed shell 27. The fixed shell 27 is fixed on the upper shell 4-1. The connecting block 26 is arranged in the fixed shell 27 and is slidably connected to the fixed shell 27. A rotating rod 22 is arranged in the connecting block 26. The distance measuring card strip 19 and the connecting rope 8 are respectively arranged at both ends of the rotating rod 22. A scale 28 is arranged on the distance measuring card strip 19.

[0033] Example 2

[0034] A workbook with the functions of preventing myopia and assisting in correcting sitting posture, the specific structure is as follows Figure 1 and Figure 2 As shown, it includes a shell 4, which is divided into an upper shell 4-1 and a lower shell 4-2. A plurality of writing papers 5 are arranged between the upper shell 4-1 and the lower shell 4-2. A distance measuring mechanism 3 is arranged on the surface of the upper shell 4-1, and the distance measuring mechanism 3 is arranged perpendicular to the lower edge of the upper shell 4-1.

[0035] like Figure 8 and Fig. 9 As shown, the distance measuring mechanism 3 includes a connecting block 26, a distance measuring card strip 19 and a fixed shell 27. The fixed shell 27 is fixed on the upper shell 4-1. The connecting block 26 is arranged in the fixed shell 27 and is slidably connected to the fixed shell 27. A rotating rod 22 is arranged in the connecting block 26. The distance measuring card strip 19 and the connecting rope 8 are respectively arranged at both ends of the rotating rod 22. A scale 28 is arranged on the distance measuring card strip 19.

[0036] like Figure 3 and Figure 7 As shown, an umbrella-shaped groove 23 is provided on the writing paper 5, and a plurality of inclined bars 6 are fixed inside the umbrella-shaped groove 23, and a pattern is drawn on the upper inclined surface of the inclined bars 6. The color of the writing paper 5 and the inclined bars 6 is both yellow that can reflect light with a wavelength of 460 to 510 nm and show a brightness of 54% to 58%. The surface of the writing paper 5 is printed with writing separators, and the color of the writing separators is cyan, green or black.

[0037] Example 3

[0038] A workbook with the functions of preventing myopia and assisting in correcting sitting posture, the specific structure is as follows Figure 1 and Figure 2 As shown, it includes a shell 4, which is divided into an upper shell 4-1 and a lower shell 4-2. A plurality of writing papers 5 are arranged between the upper shell 4-1 and the lower shell 4-2. A distance measuring mechanism 3 is arranged on the surface of the upper shell 4-1, and the distance measuring mechanism 3 is arranged perpendicular to the lower edge of the upper shell 4-1.

[0039] like Figure 6 As shown, the distance measuring mechanism 3 includes a connecting block 26, a distance measuring card strip 19 and a fixed shell 27. The fixed shell 27 is fixed on the upper shell 4-1. The connecting block 26 is arranged in the fixed shell 27 and is slidably connected to the fixed shell 27. A rotating rod 22 is arranged in the connecting block 26. The distance measuring card strip 19 and the connecting rope 8 are respectively arranged at both ends of the rotating rod 22. A scale 28 is arranged on the distance measuring card strip 19.

[0040] A slot 20 is provided on the connecting block 26, and clamping holes 17 are respectively provided at both ends of the slot 20. Two storage tubes 24 are also provided on the connecting block 26. The two storage tubes 24 are respectively embedded in both sides of the slot 20. A spring 18 is provided in each of the storage tubes 24. One end of the spring 18 is fixed in the storage tube 24, and the other end passes through the storage tube 24 and is provided with a clamping block 25. Each clamping block 25 is respectively clamped into the clamping hole 17 corresponding thereto. The bottom of the ranging card strip 19 is fixed on the clamping block 25, and the ranging card strip 19 moves as the connecting block 26 slides in the fixed shell 27.

[0041] like Figure 3 and Figure 7 As shown, an umbrella-shaped groove 23 is provided on the writing paper 5, and a plurality of inclined bars 6 are fixed inside the umbrella-shaped groove 23, and a pattern is drawn on the upper inclined surface of the inclined bars 6. The color of the writing paper 5 and the inclined bars 6 is both yellow that can reflect light with a wavelength of 460 to 510 nm and show a brightness of 54% to 58%. The surface of the writing paper 5 is printed with writing separators, and the color of the writing separators is cyan, green or black.

[0042] Example 4

[0043] A workbook with the functions of preventing myopia and assisting in correcting sitting posture, the specific structure is as follows Figure 1 and Figure 2 As shown, it includes a shell 4, which is divided into an upper shell 4-1 and a lower shell 4-2. A plurality of writing papers 5 are arranged between the upper shell 4-1 and the lower shell 4-2. A distance measuring mechanism 3 is arranged on the surface of the upper shell 4-1, and the distance measuring mechanism 3 is arranged perpendicular to the lower edge of the upper shell 4-1.

[0044] like Figure 6 As shown, the distance measuring mechanism 3 includes a connecting block 26, a distance measuring card strip 19 and a fixed shell 27. The fixed shell 27 is fixed on the upper shell 4-1. The connecting block 26 is arranged in the fixed shell 27 and is slidably connected to the fixed shell 27. A rotating rod 22 is arranged in the connecting block 26. The distance measuring card strip 19 and the connecting rope 8 are respectively arranged at both ends of the rotating rod 22. A scale 28 is arranged on the distance measuring card strip 19.

[0045] A slot 20 is provided on the connecting block 26, and clamping holes 17 are respectively provided at both ends of the slot 20. Two storage tubes 24 are also provided on the connecting block 26. The two storage tubes 24 are respectively embedded in both sides of the slot 20. A spring 18 is provided in each of the storage tubes 24. One end of the spring 18 is fixed in the storage tube 24, and the other end passes through the storage tube 24 and is provided with a clamping block 25. Each clamping block 25 is respectively clamped into the clamping hole 17 corresponding thereto. The bottom of the ranging card strip 19 is fixed on the clamping block 25, and the ranging card strip 19 moves as the connecting block 26 slides in the fixed shell 27.

[0046] like Figure 5As shown, a speed limiting mechanism 1 and a winding mechanism 2 are also provided on the upper shell 4-1. The speed limiting mechanism 1 includes a fixed cylinder 12, which is arranged at the upper end of the upper shell 4-1 and is connected to the distance measuring mechanism 3. Two iron rings 15 are arranged inside the fixed cylinder 12. The inner side walls of the two iron rings 15 are rotatably connected with magnetic rings 14. A round rod 16 is arranged in each magnetic ring 14, and a rotating wheel 13 is sleeved on each round rod 16. The connecting rope 8 passes through the distance measuring mechanism 3 and enters the speed limiting mechanism 1 and is arranged between the two round rods 16.

[0047] like Figure 4 As shown, the winding mechanism 2 includes a cylinder 7, which is arranged at the upper end of the upper shell 4-1. A fixed block 9 is arranged in the cylinder 7. A spring 10 and a winding wheel 11 are arranged along the circumference of the fixed block 9 from the inside to the outside. One end of the spring 10 is fixed to the outer wall of the fixed block 9, and the other end of the spring 10 is connected to the winding wheel 11. The connecting rope 8 passes through the speed limiting mechanism 1 and is fixed on the outer wall of the winding wheel 11.

[0048] Example 5

[0049] A workbook with the functions of preventing myopia and assisting in correcting sitting posture, the specific structure is as follows Figure 1 and Figure 2 As shown, it includes a shell 4, which is divided into an upper shell 4-1 and a lower shell 4-2. A plurality of writing papers 5 are arranged between the upper shell 4-1 and the lower shell 4-2. A distance measuring mechanism 3 is arranged on the surface of the upper shell 4-1, and the distance measuring mechanism 3 is arranged perpendicular to the lower edge of the upper shell 4-1.

[0050] like Figure 6 As shown, the distance measuring mechanism 3 includes a connecting block 26, a distance measuring card strip 19 and a fixed shell 27. The fixed shell 27 is fixed on the upper shell 4-1. The connecting block 26 is arranged in the fixed shell 27 and is slidably connected to the fixed shell 27. A rotating rod 22 is arranged in the connecting block 26. The distance measuring card strip 19 and the connecting rope 8 are respectively arranged at both ends of the rotating rod 22. A scale 28 is arranged on the distance measuring card strip 19.

[0051] like Figure 5 As shown, a speed limiting mechanism 1 and a winding mechanism 2 are also provided on the upper shell 4-1. The speed limiting mechanism 1 includes a fixed cylinder 12, which is arranged at the upper end of the upper shell 4-1 and is connected to the distance measuring mechanism 3. Two iron rings 15 are arranged inside the fixed cylinder 12. The inner side walls of the two iron rings 15 are rotatably connected with magnetic rings 14. A round rod 16 is arranged in each magnetic ring 14, and a rotating wheel 13 is sleeved on each round rod 16. The connecting rope 8 passes through the distance measuring mechanism 3 and enters the speed limiting mechanism 1 and is arranged between the two round rods 16.

[0052] like Figure 4As shown, the winding mechanism 2 includes a cylinder 7, which is arranged at the upper end of the upper shell 4-1. A fixed block 9 is arranged in the cylinder 7. A spring 10 and a winding wheel 11 are arranged along the circumference of the fixed block 9 from the inside to the outside. One end of the spring 10 is fixed to the outer wall of the fixed block 9, and the other end of the spring 10 is connected to the winding wheel 11. The connecting rope 8 passes through the speed limiting mechanism 1 and is fixed on the outer wall of the winding wheel 11.

[0053] Here’s how this application works:

[0054] When working, after placing the exercise books neatly, pull the distance measuring card strip 19 to measure the distance between the exercise books and the body, and then adjust the distance between the exercise books and the body. After the adjustment, release the distance measuring card strip 19, the winding spring 10 drives the winding wheel 11 to rotate, the winding wheel 11 winds up the connecting rope 8, and the connecting rope 8 pulls the connecting block 26 and the distance measuring card strip 19 back to the original position, and then open the shell 4, look at the tilting bar 6 with your eyes, and watch the pattern of the tilting bar 6. If you can't see the pattern, adjust the angle of your head so that you can see the pattern. This can assist with sitting posture and keep the head away from the exercise books. To protect the eyes, the colors of the writing paper 5 and the inclined strip 6 are yellow, and the writing separator strip is cyan, which has less stimulation to the eyes and is helpful to protect eyesight; the clockwork spring 10 rotates the winding wheel 11, and the winding wheel 11 winds up the connecting rope 8. The connecting rope 8 moves to rotate the two rotating wheels 13, and the rotating wheel 13 rotates with the round rod 16 and the magnetic ring 14. The magnetic ring 14 and the iron ring 15 attract each other, which increases the difficulty of the round rod 16 and the rotating wheel 13, and slows down the rotation speed of the rotating wheel 13. The rotating wheel 13 slows down the movement of the connecting rope 8 through friction, which prevents the ranging card strip 19 from moving too fast and causing injury.

[0055] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0056] 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", "comprises" or any other variations 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. In the absence of further restrictions.

[0057] 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 workbook with the functions of preventing myopia and assisting in correcting sitting posture, characterized in that: The invention comprises a shell (4), wherein the shell (4) is divided into an upper shell (4-1) and a lower shell (4-2), a plurality of writing papers (5) are arranged between the upper shell (4-1) and the lower shell (4-2), and a distance measuring mechanism (3) is arranged on the surface of the upper shell (4-1), wherein the distance measuring mechanism (3) is arranged perpendicular to the lower edge of the upper shell (4-1).

2. The exercise book with the function of preventing myopia and assisting in correcting sitting posture according to claim 1, characterized in that: The distance measuring mechanism (3) comprises a connecting block (26), a distance measuring card strip (19) and a fixed shell (27); the fixed shell (27) is fixed to the upper shell (4-1); the connecting block (26) is arranged in the fixed shell (27) and is slidably connected to the fixed shell (27); a rotating rod (22) is arranged in the connecting block (26); the distance measuring card strip (19) and a connecting rope (8) are respectively arranged at two ends of the rotating rod (22); and a scale (28) is arranged on the distance measuring card strip (19).

3. The exercise book with the function of preventing myopia and assisting in correcting sitting posture according to claim 2, characterized in that: The connecting block (26) is provided with a slot (20), and both ends of the slot (20) are provided with locking holes (17). The connecting block (26) is also provided with two storage tubes (24), and the two storage tubes (24) are respectively embedded in both sides of the slot (20). A spring (18) is provided in each of the storage tubes (24), and one end of the spring (18) is fixed in the storage tube (24), and the other end of the spring (18) passes through the storage tube (24) and is provided with a locking block (25). Each of the locking blocks (25) is respectively locked in a corresponding locking hole (17). The bottom of the distance measuring card strip (19) is fixed on the card strip (25), and the distance measuring card strip (19) moves as the connecting block (26) slides in the fixed shell (27).

4. The exercise book with the function of preventing myopia and assisting in correcting sitting posture according to claim 3, characterized in that: The upper shell (4-1) is also provided with a speed limiting mechanism (1) and a winding mechanism (2). The speed limiting mechanism (1) comprises a fixed cylinder (12). The fixed cylinder (12) is arranged at the upper end of the upper shell (4-1) and is connected to the distance measuring mechanism (3). Two iron rings (15) are arranged inside the fixed cylinder (12). The inner side walls of the two iron rings (15) are rotatably connected to magnetic rings (14). A round rod (16) is arranged in each of the magnetic rings (14). A rotating wheel (13) is sleeved on each of the round rods (16). The connecting rope (8) passes through the distance measuring mechanism (3) and enters the speed limiting mechanism (1) and is arranged between the two round rods (16).

5. The exercise book with the function of preventing myopia and assisting in correcting sitting posture according to claim 4, characterized in that: The winding mechanism (2) comprises a cylinder (7), the cylinder (7) being arranged at the upper end of the upper shell (4-1), a fixed block (9) being arranged inside the cylinder (7), a spring (10) and a winding wheel (11) being arranged along the circumference of the fixed block (9) from the inside to the outside, one end of the spring (10) being fixed to the outer wall of the fixed block (9), the other end of the spring (10) being connected to the winding wheel (11), and the connecting rope (8) passing through the speed limiting mechanism (1) and being fixed to the outer wall of the winding wheel (11).

6. The exercise book with the function of preventing myopia and assisting in correcting sitting posture according to claim 2, characterized in that: The writing paper (5) is provided with an umbrella-shaped groove (23), a plurality of inclined strips (6) are fixed inside the umbrella-shaped groove (23), and a pattern is drawn on the upper inclined surface of the inclined strips (6).

7. The exercise book with the function of preventing myopia and assisting in correcting sitting posture according to claim 6, characterized in that: The colors of the writing paper (5) and the inclined strip (6) are both capable of reflecting light with a wavelength of 460 to 510 nm and showing a yellow color with a brightness of 54% to 58%. The surface of the writing paper (5) is printed with a writing separator strip, and the color of the writing separator strip is cyan, green or black.

8. The exercise book with the function of preventing myopia and assisting in correcting sitting posture according to claim 1, characterized in that: A housing sleeve (21) is also provided outside the upper housing (4-1) for protecting the distance measuring mechanism (3), the speed limiting mechanism (1) and the winding mechanism (2).

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