A notebook with opening and closing angle limiting and fixing function

Abstract

The utility model relates to stationery field discloses a notebook of opening and closing angle limiting and fixed. It includes book seal shell, writing page and opening and closing limiting assembly, and book seal shell includes cover and seal bottom, and cover is connected with seal bottom, and the cover can rotate relative to seal bottom and realize opening and closing, and writing page is bound on seal bottom, and opening and closing limiting assembly includes support rod, and one side of support rod is connected with the cover or seal bottom hinged, and the other side is detachably connected with seal bottom or cover to limit closing of the cover. The utility model discloses that the support rod can be connected with the cover, and the opening and closing angle of the cover is limited, which is beneficial to writing or drawing in the emergency without a table, the tensioning rope can share a part of tension, and the stability of the opening angle limiting of the cover is improved, and the convenience of finding the corresponding notebook is improved.

Description

Technical Field

[0001] This utility model relates to the field of stationery technology, and more specifically, to a notebook with a limited and fixed opening and closing angle. Background Technology

[0002] Notebooks are primarily used for writing, taking notes, sketching, and other creative tasks. Existing notebooks consist of a cover and writing pages, with multiple writing pages stacked and bound together. The cover includes a front cover and a back cover, with the writing pages connected and bound to the back cover. The front and back covers are integrally formed, and the front cover can be unfolded or folded relative to the back cover to open or close the notebook. Current front and back covers are constructed from a combination of rigid materials (such as cardboard or composite cardboard) and decorative materials (such as felt, leather, or decorative paper). In this design, because the front and back covers are integrally formed and the notebook is normally closed, the front cover, once opened, cannot be folded back to the back cover and tends to close. When used on a table, the user needs to press the front cover down with their left hand or arm for a period of time to allow it to hold its shape and lose its tendency to close.

[0003] However, when there is no table (for example, when you need to take notes while visiting a factory with your supervisor, or when you need to sketch a beautiful view outdoors), you need to support the notebook with your left forearm and hold the pen with your right hand, which makes it difficult to press down on the cover and limit the movement, thus affecting writing or drawing. Utility Model Content

[0004] To address at least one of the aforementioned problems, this utility model provides a notebook with a limited and fixed opening / closing angle, comprising a book cover, writing pages, and an opening / closing limiting component. The book cover includes a front cover and a back cover, the front cover being connected to the back cover, and the front cover being able to rotate relative to the back cover to open and close. The writing pages are bound to the back cover. The opening / closing limiting component includes a support rod, one side of which is hinged to the front cover or the back cover, and the other side is detachably connected to the back cover or the front cover, to limit the closing of the front cover.

[0005] Optionally, the book cover further includes a rotating part, which is composed of multiple arc-shaped segments connected in sequence, and the front cover and the back cover are respectively connected to both sides of the rotating part.

[0006] Optionally, the writing page and the back cover are spaced apart on the upper and lower sides, the support rod is located above the writing page and is hinged to the back cover; a first magnetic block is fixedly installed on the inner side of the cover, and a metal sheet is fixedly provided on the side of the support rod connected to the cover, and the first magnetic block can attract the metal sheet; when the first magnetic block attracts the metal sheet, the angle between the cover and the back cover is obtuse.

[0007] Optionally, a second magnetic block is fixedly provided on the inner side of the bottom cover, and a third magnetic block is fixedly provided on the support rod. When the support rod does not support the cover, the second magnetic block and the third magnetic block attract each other.

[0008] Optionally, the opening and closing limiting component further includes a tension rope, one end of which is fixedly connected to the cover or the back cover, and the other end is detachably connected to the back cover or the cover, so as to limit the opening of the cover to a certain angle.

[0009] Optionally, multiple writing pages are stacked together and bound together by a spiral coil, with each writing page having a binding hole fitted onto the spiral coil.

[0010] Optionally, one end of the spiral coil is bent and protrudes to form a cantilever column, the support rod is rotatably sleeved on the cantilever column, and the end of the cantilever column away from the spiral coil is bent to form a blocking column, the blocking column being used to prevent the support rod from falling off the cantilever column. One end of the tension rope is fixedly connected to the cover, and the other end is sleeved on the cantilever column.

[0011] Optionally, the writing page is provided with an easy-tear line, which is spaced apart from the binding hole.

[0012] Optionally, the notebook with limited and fixed opening angle also includes label paper, which is fixedly connected to the writing page on the side away from the spiral coil and is suspended. Multiple labels are provided, and the multiple labels are arranged at intervals along the vertical and thickness directions. Multiple writing pages are provided between two adjacent labels.

[0013] Optionally, the spiral coil has a notch for inserting the writing page, and a pressure plate is glued to the inside of the bottom cover. The pressure plate is a rigid plate with an insertion hole. One end of the spiral coil at the notch is inserted into the insertion hole, and the pressure plate is adapted to press and fix the spiral coil to the bottom cover.

[0014] Compared with the prior art, the beneficial technical effects of this utility model are as follows:

[0015] 1. After the cover is opened, the support rod can connect with the cover to limit the opening and closing of the cover. In emergency situations where there is no table, users do not need to additionally limit the cover, which is more conducive to writing or drawing.

[0016] 2. After the support rod is attracted to the first magnetic block on the cover, it can provide both support and tension, thereby limiting the opening and closing angle of the cover. During operation, simply rotate the support rod to attract it to the first magnetic block. The operation is simple and convenient. When not in use, the support rod will be attracted to the bottom cover by the second and third magnetic blocks, so it will not protrude from the bottom cover due to shaking and affect carrying.

[0017] 3. The tension rope serves as a reinforcement. After the support rod supports the cover, the tension rope can be fitted onto the cantilever column to limit the opening of the cover. The tension rope can share some of the tension and improve the stability of limiting the opening angle of the cover.

[0018] 4. Because the writing pages are bound with a spiral coil, each writing page can be completely flipped 360 degrees and easily laid flat on the table. However, the outer diameter of the spiral coil is greater than the thickness of multiple writing pages stacked together. The cover, back cover and rotating part wrap the entire spiral coil and writing pages, making the notebook look neater and enhancing its aesthetics.

[0019] 5. Users can mark the contents of the multiple pages in front of the label on the label. When searching, users can find the information intuitively through the label. In addition, when flipping through the pages, users can simply pinch the label to flip over all the pages in front of it, which improves the convenience of finding the corresponding notes. Attached Figure Description

[0020] Figure 1 The structure of the notebook in the open state in this embodiment of the utility model Figure 1 ;

[0021] Figure 2 The structure of the notebook in the open state in this embodiment of the utility model Figure 2 ;

[0022] Figure 3 This is a structural diagram of the spiral coil in an embodiment of the present invention;

[0023] Figure 4 This is a partial enlarged view of an embodiment of the present utility model;

[0024] Figure 5 This is a structural diagram of the spiral coil and pressure plate in an embodiment of this utility model;

[0025] Figure 6 for Figure 1 Enlarged view of section A;

[0026] Figure 7 for Figure 5 Enlarged view of section B in the middle.

[0027] Explanation of reference numerals in the attached drawings: 1. Book cover; 11. Front cover; 12. Back cover; 13. Rotating part; 14. Pressure plate; 141. Insertion hole; 15. First magnetic block; 16. Second magnetic block; 2. Writing page; 21. Binding hole; 22. Tear line; 23. Label paper; 3. Opening and closing limit assembly; 31. Support rod; 32. Tensioning rope; 33. Metal sheet; 34. Third magnetic block; 4. Spiral coil; 41. Notch; 42. Cantilever column; 43. Blocking column. Detailed Implementation

[0028] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the following description is provided in conjunction with the appendix. Figure 1-7 This application will be described in further detail.

[0029] The accompanying drawings of this utility model embodiment provide a coordinate system XY, where the positive direction of the X-axis represents the right, the negative direction of the X-axis represents the left, the positive direction of the Y-axis represents the top, and the negative direction of the Y-axis represents the bottom.

[0030] This utility model embodiment provides a notebook with limited and fixed opening and closing angles, referring to... Figure 1 and Figure 2 The notebook with limited and fixed opening angle includes a book cover 1, writing pages 2, and an opening and closing limiting component 3. The book cover 1 includes a front cover 11, a back cover 12, and a rotating part 13. The front cover 11 and back cover 12 are respectively connected to both sides of the rotating part 13. The front cover 11 can be opened and closed by rotating relative to the back cover 12 through the rotating part 13. The writing pages 2 are bound to the back cover 12 for the user to write or draw sketches. The opening and closing limiting component 3 can limit the opening angle of the front cover 11 after it has opened to a certain angle, making it difficult for the front cover 11 to continue opening or closing. This is convenient in emergency situations where there is no table, eliminating the need to use fingers to limit the opening angle of the front cover 11, and allowing the user to support the notebook with their left forearm while holding a pen in their right hand for writing or drawing. When writing normally on a table, the opening and closing limiting component 3 does not limit the opening angle of the front cover 11.

[0031] Reference Figure 1 and Figure 2 The cover 11, back cover 12, and rotating part 13 are integrally formed and are all made of rigid cardboard. The cover 11 and back cover 12 are respectively connected to the left and right sides of the rotating part 13. The rotating part 13 is composed of multiple arc-shaped segments connected in sequence. That is, the rotating part 13 is bent into multiple segments, which facilitates the accommodation of thicker writing pages 2 and ensures that the cover 11 can rotate relative to the back cover 12.

[0032] The top and bottom sides of the writing page 2 are spaced apart from the top and bottom sides of the back cover 12 and the front cover 11. Thus, when the front cover 11 is closed, the top and bottom sides of the front cover 11 and the back cover 12 protrude from the writing page 2 to form a cavity, which makes it easier for the user to open the front cover 11 or the back cover 12 when using it.

[0033] Reference Figures 1 to 3 Multiple pages 2 are stacked together and bound together by a spiral coil 4 (an existing binding method, the specific structure of which will not be described in detail). This allows each page 2 to be fully rotated 360 degrees, easily laid flat on the table, improving writing comfort. The spiral coil 4 is made of a metal material with a certain degree of hardness and is not easily deformed, so it is not easily deformed when compressed, thus not affecting the rotation of the pages 2. The multi-segmented arc of the rotating part 13 makes the curvature of the rotating part 13 larger, which can easily accommodate the spiral coil 4.

[0034] Reference Figures 2 to 4 The spiral coil 4 is located on the side of the writing page 2 near the rotating part 13. The spiral coil 4 is located away from the rotating part 13 and near the bottom cover 12, and has multiple notches 41 spaced apart in the vertical direction. Each writing page 2 has multiple binding holes 21 spaced apart in the vertical direction on the side near the spiral coil 4. The corresponding binding holes 21 are fitted onto the spiral coil 4 from the corresponding notches 41, so that the writing page 2 can rotate relative to the spiral coil 4 and multiple writing pages 2 can be bound together.

[0035] Each page 2 has an easy-tear line 22 near the binding hole 21, located on the side of the binding hole 21 away from the rotating part 13. When the notes recorded on the page 2 need to be torn off and handed over to someone else, the page 2 is torn off cleanly through the easy-tear line 22. If the easy-tear line 22 is not provided, the page 2 will be removed from the binding hole 21 after being torn off, resulting in an uneven and rough tear.

[0036] Reference Figure 1 and Figure 2 The notebook, which limits and fixes the opening angle, also includes multiple label sheets 23. The number of label sheets 23 is less than the number of writing pages 2. The label sheets 23 are located on the side of the writing page 2 away from the spiral coil 4 and are suspended. The multiple label sheets 23 are arranged at intervals along the vertical and thickness directions of the writing page 2, so that there are multiple writing pages 2 between two adjacent label sheets 23. The vertical and horizontal arrangement of the multiple label sheets 23 makes it easy for the user to see the content recorded on each label sheet 23. The user can mark the content recorded on the multiple writing pages 2 in front of the label sheet 23. When searching, the user can find it intuitively through the label sheet 23. In addition, when flipping through, the user can directly pinch the label sheet 23 to flip over all the writing pages 2 in front of the label sheet 23, which improves the convenience of finding the corresponding notes.

[0037] The writing page 2 and the label 23 are spaced apart from the side of the back cover 12 away from the rotating part 13, and the label 23 does not protrude from the back cover 12 and the front cover 11. When the front cover 11 is closed, the label 23 is not easily exposed to the outside and thus not torn during carrying.

[0038] Reference Figures 2 to 7 A pressure plate 14 is glued to the inside of the back cover 12 (the side closest to the writing page 2) with strong adhesive. The pressure plate 14 is also made of rigid cardboard. The writing page 2 is located on the side of the pressure plate 14 away from the back cover 12. Since the writing page 2 is spaced apart from the back cover 12 in the vertical direction and on the side closest to the back cover 12 away from the rotating part 13, the pressure plate 14 is also spaced apart from the top and bottom sides of the back cover 12 and on the side away from the rotating part 13. Multiple insertion holes 141 are spaced apart in the vertical direction on the side of the pressure plate 14 near the rotating part 13. One end of the spiral coil 4 at the notch 41 is inserted into the corresponding insertion hole 141, so that the spiral coil 4 can be pressed and fixed to the back cover 12 by the pressure plate 14. It is worth noting that after the spiral coil 4 is pressed onto the back cover 12 by the pressure plate 14, the notch 41 on the spiral coil 4 is partially blocked by the pressure plate 14, thus making it difficult for the writing page 2 to fall off from the notch 41 of the spiral coil 4.

[0039] Reference Figures 2 to 7 The opening and closing limiting component 3 includes a support rod 31 and a tension rope 32. The support rod 31 is a high-strength plastic part. Since the cover 11, back cover 12, and rotating part 13 are all made of rigid cardboard, and the cover 11 is normally closed, if the cover 11 is not limited after being opened, the cover 11 will tend to close. However, one side of the support rod 31 is rotatably connected to the spiral coil 4, and the other side is detachably connected to the cover 11, thereby fixing and limiting the opening and closing angle of the cover 11 after it is opened to a certain angle. In another embodiment, the support rod 31 can be hinged to the back cover 12; in yet another embodiment, one side of the support rod 31 can be hinged to the inside of the cover 11, and the other side is detachably connected to the back cover 12. One end of the tension rope 32 is fixedly connected to the cover 11, and the other end is detachably sleeved on the threaded coil. The tension rope 32 serves as a reinforcement. After the support rod 31 supports the cover 11, the tension rope 32 can be sleeved on the cantilever column 42 to limit the opening of the cover 11. The tension rope 32 can share some of the tension, improving the stability of limiting the opening angle of the cover 11. In another embodiment, a component for sleeved tension rope 32 can also be fixedly provided on the bottom cover 12; in yet another embodiment, one end of the tension rope 32 is fixed to the inside of the bottom cover 12, and a component for sleeved connection of tension rope 32 is fixedly provided on the inside of the cover 11.

[0040] Since the top and bottom sides of the writing page 2 are spaced apart from the top and bottom sides of the back cover 12, the support rod 31 is located above the writing page 2 and does not protrude from the back cover 12. Since the multiple writing pages 2 have a certain thickness, the cover 11 will not interfere with the cover 11 after it is closed.

[0041] Reference Figures 2 to 7 A cantilever column 42 protrudes from the upper part of the spiral coil 4. The cantilever column 42 does not protrude from the bottom cover 12. The support rod 31 is sleeved on the cantilever column 42 and can rotate relative to the cantilever column 42 to limit the opening of the cover 11. A blocking column 43 is bent at the end of the cantilever column 42 away from the spiral coil 4. The blocking column 43 can prevent the support rod 31 from moving away from the spiral coil 4, making it difficult for the support rod 31 to fall off the cantilever column 42.

[0042] A first groove is formed on the inner side of the cover 11, and a first magnetic block 15 is placed in the first groove. The first magnetic block 15 is first fixed in the first groove with hot melt adhesive. After the hot melt adhesive is fixed, strong glue is applied to increase the fixing strength between the first magnetic block 15 and the cover 11. After the first magnetic block 15 is installed, a layer of white paper is glued to the inner side of the cover 11 to improve neatness and aesthetics. The side of the support rod 31 away from the cantilever column 42 has an inclined surface that fits against the cover 11. A placement groove is formed on the inclined surface, and a metal sheet 33 is placed in the placement groove. After the metal sheet 33 is placed in the placement groove, molten plastic glue is injected around the placement groove. After the plastic glue solidifies, it will fix the metal sheet 33 and the support rod 31 together. The first magnetic block 15 can attract the metal sheet 33. When the first magnetic block 15 attracts the metal sheet 33, the angle between the cover 11 and the back cover 12 is obtuse; in this embodiment, it is preferably an obtuse angle of 138 degrees. After the first magnetic block 15 and the metal sheet 33 are attracted, the support rod 31 not only provides a supporting force, but the magnetic connection also plays a role in pulling force, thereby limiting the opening and closing angle of the cover 11.

[0043] In another embodiment, a dovetail block can be fixedly installed inside the cover 11. The dovetail groove is opened by the movement of the support rod 31 away from the cantilever column 42. The dovetail block can be inserted into the dovetail groove, thereby limiting the opening and closing angle of the cover 11.

[0044] Reference Figures 2 to 7A second groove is provided on the inner side of the back cover 12, located above the writing page 2. A second magnet 16 is placed in the second groove. The second magnet 16 is fixed in the same way as the first magnet 15, which will not be elaborated further. After the second magnet 16 is fixed, a layer of white paper is also glued inside the back cover 12. A mounting groove is provided on the side of the support rod 31 near the back cover 12. A third magnet 34 is placed in the mounting groove. The third magnet 34 is fixed in the same way as the metal piece 33, and the second magnet 16 and the third magnet 34 attract each other. When not in use, the support rod 31 is attracted to the back cover 12 by the second magnet 16 and the third magnet 34, so that it will not protrude from the back cover 12 due to shaking and affect carrying.

[0045] A countersunk hole is provided on the outer side of the cover 11. The tension rope 32 passes through the countersunk hole, and a knot is tied to the end of the tension rope 32. The knot is located inside the large hole of the countersunk hole and is fixed to the cover 11 with hot melt adhesive. A patterned sticker is glued to the outer side of the cover 11 to cover the countersunk hole. The other end of the tension rope 32 has a collar, which can be fitted onto the cantilever column 42 to apply a pulling force to the opening of the cover 11, thereby limiting the opening angle of the cover 11. When the support rod 31 supports the cover 11, the tension rope 32 is in a taut state. It is worth noting that when the support rod 31 supports the cover 11 and the tension rope 32 is fitted onto the cantilever column 42, the strength of the cantilever column 42 is greater than the tension of the tension rope 32 and the pressure of the support rod 31. Therefore, the cantilever column 42 will not deform or bend, thus providing stable support.

[0046] The implementation principle of a notebook with limited and fixed opening angle according to an embodiment of this application is as follows: In an emergency where there is no table, the user flips the cover 11 open so that it forms an obtuse angle, then moves it to the support rod 31, causing the first magnet 15 and the metal plate 33 to attract each other, thus limiting the opening angle of the cover 11. If a large number of writing pages 2 also need to be flipped to the inside of the cover 11 after it is opened, the tension rope 32 is fitted onto the suspension column 42, making it difficult for the cover 11 to overcome the magnetic attraction due to its weight and continue to unfold. At this time, the user can support the notebook with their left forearm and write or draw with their right hand. Since the cover 11 is fixed at an obtuse angle when opened, the writing pages 2 that are flipped to fit against the inside of the cover 11 will not flip onto the back cover 12 and affect writing.

[0047] With a table, the support rod 31 is stably attached to the inside of the bottom cover 12 by the second magnet 16 and the third magnet 34, and the tension rope 32 does not need to be sleeved on the cantilever column 42, thus enabling normal writing.

[0048] Similarly, the components included in the "components," "mechanisms," and "devices" of this disclosure can also be flexibly combined. They can be modularly produced according to actual needs and assembled as an independent module; or they can be assembled separately to form a module in this device. The division of the above-mentioned components in this disclosure is only one embodiment for ease of reading and is not intended to limit the scope of protection of this disclosure. Any technical solution that includes the above-mentioned components and has the same function should be understood as an equivalent technical solution of this disclosure.

[0049] In the description of this disclosure, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this disclosure.

[0050] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include at least one of that feature. In the description of this disclosure, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0051] In this disclosure, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this disclosure according to the specific circumstances.

[0052] In this disclosure, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0053] It should be noted that when a component is referred to as "fixed to," "set on," "fixed to," or "mounted on" another component, it can be directly on the other component or there may be an intervening component. When a component is considered to be "connected to another component," it can be directly connected to the other component or there may be an intervening component. Furthermore, when a component is considered to be "fixedly connected" to another component, the connection can be detachable or non-detachable, such as through socketing, snap-fitting, integral molding, welding, etc., which are achievable in conventional technologies and will not be elaborated upon here.

[0054] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0055] The above embodiments are merely illustrative of several implementation methods of this disclosure, and their descriptions are relatively specific and detailed. However, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the inventive concept of this disclosure, and these modifications and improvements all fall within the protection scope of this disclosure.

Claims

1. A notebook computer with a limited and fixed opening / closing angle, characterized in that: The book includes a book cover (1), writing pages (2), and an opening and closing limiting component (3). The book cover (1) includes a front cover (11) and a back cover (12). The front cover (11) is connected to the back cover (12), and the front cover (11) can rotate relative to the back cover (12) to open and close. The writing pages (2) are bound to the back cover (12). The opening and closing limiting component (3) includes a support rod (31). One side of the support rod (31) is hinged to the front cover (11) or the back cover (12), and the other side is detachably connected to the back cover (12) or the front cover (11) to limit the closing of the front cover (11).

2. The notebook computer with limited and fixed opening and closing angle according to claim 1, characterized in that: The book cover (1) also includes a rotating part (13), which is composed of multiple arc-shaped segments connected in sequence. The front cover (11) and the back cover (12) are respectively connected to the two sides of the rotating part (13).

3. The notebook computer with limited and fixed opening and closing angle according to claim 1, characterized in that: The writing page (2) and the back cover (12) are spaced apart on the upper and lower sides. The support rod (31) is located above the writing page (2) and is hinged to the back cover (12). A first magnetic block (15) is fixedly installed on the inner side of the cover (11). A metal sheet (33) is fixedly provided on the side of the support rod (31) connected to the cover (11). The first magnetic block (15) can attract the metal sheet (33). When the first magnetic block (15) attracts the metal sheet (33), the cover (11) and the back cover (12) are at an obtuse angle.

4. The notebook computer with limited and fixed opening / closing angle according to claim 3, characterized in that: A second magnetic block (16) is fixedly provided on the inner side of the bottom cover (12), and a third magnetic block (34) is fixedly provided on the support rod (31). When the support rod (31) does not support the cover (11), the second magnetic block (16) and the third magnetic block (34) attract each other.

5. The notebook computer with opening and closing angle limiting and fixing according to any one of claims 1-4, characterized in that: The opening and closing limiting component (3) also includes a tension rope (32), one end of which is fixedly connected to the cover (11) or the back cover (12), and the other end is detachably connected to the back cover (12) or the cover (11) to limit the opening of the cover (11) after it is opened to a certain angle.

6. The notebook computer with opening and closing angle limiting and fixing according to claim 5, characterized in that: The writing pages (2) are stacked in multiple layers and bound together by a spiral coil (4). Each writing page (2) has a binding hole (21) fitted onto the spiral coil (4).

7. The notebook computer with opening and closing angle limiting and fixing according to claim 6, characterized in that: One end of the spiral coil (4) is bent and protrudes to form a cantilever column (42). The support rod (31) is rotatably sleeved on the cantilever column (42). The end of the cantilever column (42) away from the spiral coil (4) is bent to form a blocking column (43). The blocking column (43) is used to prevent the support rod (31) from falling off the cantilever column (42). One end of the tension rope (32) is fixedly connected to the cover (11), and the other end is sleeved on the cantilever column (42).

8. The notebook computer with limited and fixed opening and closing angle according to claim 6, characterized in that: The writing page (2) is provided with an easy-tear line (22), which is spaced apart from the binding hole (21).

9. The notebook computer with limited and fixed opening and closing angle according to claim 6, characterized in that: It also includes label paper (23), which is fixedly connected to the writing page (2) on the side away from the spiral coil (4) and is suspended. There are multiple labels (23), which are arranged at intervals along the vertical and thickness directions. There are multiple writing pages (2) between two adjacent labels (23).

10. The notebook computer with opening and closing angle limiting and fixing according to claim 6, characterized in that: The spiral coil (4) has a notch (41) for inserting the writing page (2). A pressure plate (14) is glued to the inside of the bottom cover (12). The pressure plate (14) is a rigid plate. An insertion hole (141) is opened on the pressure plate (14). One end of the spiral coil (4) at the notch (41) is inserted into the insertion hole (141). The pressure plate (14) is suitable for pressing and fixing the spiral coil (4) onto the bottom cover (12).

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