Loose-leaf notebook

Abstract

A loose-leaf notebook, comprising a page holder and a cover (5), wherein the page holder comprises at least one set of first page grips (3-1) and second page grips (3-2), the first page grips (3-1) and the second page grips (3-2) can be correspondingly closed or separated, the page holder is located on an outer side of the cover (5) and is connected to the cover (5), and the first page grips (3-1) and the second page grips (3-2) extend inside the cover (5) and are configured for securing hole-punched paper. Arranging a page holder of the loose-leaf notebook on the outer side of a cover (5), ensures that the page holder does not sit underneath loose-leaf pages inside the cover (5), thereby preventing hand discomfort when writing, as the loose-leaf pages lay completely flat against the cover (5) when opened, eliminating unevenness and tactile instability, and providing a good experience.

Description

A type of loose-leaf book

[0001] This application claims priority to the patent application filed on October 29, 2024, with China National Intellectual Property Administration, application number 2024226183559, entitled "A Loose-leaf Book". Technical Field

[0002] This application relates to the technical field of stationery, and more specifically to a loose-leaf notebook. Background Technology

[0003] Loose-leaf notebooks are popular because they allow for easy addition and removal of pages. However, most loose-leaf notebooks on the market use a locking mechanism with claws on both sides. When changing the core or adding / removing pages, opening the clamp requires forcefully pressing the locking claws on both sides, which is inconvenient. Furthermore, for ease of writing, loose-leaf notebooks generally have a stiff cover. The clamps on most loose-leaf notebooks are often located inside the cover. When the pages are unfolded, the inside of the pages overlaps the clamp, creating a step-like surface on the paper. This can be uncomfortable to hold and creates a feeling of suspension when writing on the side of the paper, resulting in a poor writing experience.

[0004] Application content

[0005] The technical problem to be solved by this application is to provide a loose-leaf notebook in which the loose-leaf paper inside the cover is flat and does not feel rough when writing.

[0006] The technical solution of this application is to provide a loose-leaf notebook, including a clamp and a cover. The clamp includes at least one set of first claws and second claws. The first claws and second claws can be closed or separated accordingly. The clamp is located on the outside of the cover and connected to the cover. The first claws and second claws extend into the inside of the cover and are used to fix the perforated paper.

[0007] Compared with the prior art, the loose-leaf binder of this application has the following advantages: the binder is set on the outside of the cover and will not be stacked under the loose-leaf paper inside the cover, avoiding discomfort when writing. When the loose-leaf paper is unfolded, it lies directly on the cover, flat and without any feeling of being suspended, resulting in a better user experience.

[0008] Preferably, the clamp includes a bracket, a pull rod, and a first clamping part. A first jaw is disposed on the first clamping part, and a second jaw is disposed on the bracket. The pull rod is slidably connected to both the bracket and the first clamping part. The sliding of the pull rod relative to the bracket drives the first clamping part to slide relative to the bracket, causing the first jaw and the second jaw to close or separate accordingly. With this structure, the closing or separation of the first jaw and the second jaw is achieved by the sliding of the pull rod relative to the bracket, eliminating the need to forcefully press the first jaw and the second jaw to unlock as in existing technologies, making operation simple and labor-saving.

[0009] Preferably, the bracket has two cover connecting parts; the pull rod has an upper and a lower clearance part that respectively avoids the two cover connecting parts; the first clamp has a first upper clearance groove and a first lower clearance groove that respectively avoid the two cover connecting parts; two screws are installed inside the cover, and the two screws pass through the cover and are connected to the two cover connecting parts respectively. With this structure, the connection between the cover and the loose-leaf book holder is simple, easy to assemble, and will not affect the movement of the pull rod and the first clamp, nor will it affect the opening and closing between the first and second jaws.

[0010] Preferably, the top of the bracket is provided with a cover limiting part, and the inner side of the cover limiting part is provided with a hook structure, and the upper end of the cover is limited within the hook structure of the cover limiting part. With this structure, the cover can be limited when connecting the clamp and the cover, which facilitates assembly and makes the clamp and the cover fit together more tightly in terms of structure.

[0011] Preferably, the support has a pull rod slide rail along its length, and the pull rod slidably engages within the pull rod slide rail. The first clamping part has at least one first groove, and the pull rod has a first protrusion that corresponds to and slidably engages with the first groove. The pull rod can slide along the pull rod slide rail, causing the first protrusion to slide within the corresponding first groove, driving the first clamping part to move left or right relative to the support, thereby driving the first and second jaws to close or separate accordingly. This structure simplifies the pull rod-driven first clamping part structure, making the overall structure of the loose-leaf notebook clamp of this application simple, easy to assemble, and convenient to operate.

[0012] Preferably, the lower end of the pull rod is provided with a push-pull part, which is opposite to the lower end of the cover. Pulling the push-pull part away from the lower end of the cover can separate the first claw and the second claw, and pushing the push-pull part towards the lower end of the cover can close the first claw and the second claw accordingly. With this structure, the push-pull part is clearly exposed, which facilitates the operation of opening and closing the first claw and the second claw by pulling the pull rod; when the first claw and the second claw are closed accordingly, it also makes the clamp and the cover fit more tightly in terms of structure.

[0013] Preferably, a limiting flange is provided on the wall of the first slide groove. The first protrusion slides upward along the first slide groove below the limiting flange, which allows the first pawl and the second pawl to close accordingly. When the first pawl and the second pawl are closed, the first protrusion slides above the limiting flange and is limited by the limiting flange. With this structure, when the first pawl and the second pawl are closed, the pull rod cannot slide down freely. The first pawl and the second pawl are locked and will not open on their own. Thus, the first pawl and the second pawl can be locked without the need for a mutual interlocking structure as in the prior art.

[0014] Preferably, the pull rod slides upward along the pull rod track, causing the first and second pawls to close accordingly. The first clamping part is provided with a first upper limit groove with a downward opening. The pull rod is provided with an upwardly protruding first limiting part. When the first and second pawls close accordingly, the first limiting part enters the first upper limit groove from the downward opening and is limited by the first upper limit groove. With this structure, when the first and second pawls close accordingly, the first clamping part cannot move left or right, and the pull rod cannot slide down; that is, the first and second pawls are locked and will not open on their own. Thus, the first and second pawls can be locked without the interlocking structure found in existing technologies.

[0015] Preferably, the first groove includes a first groove segment and a second groove segment connected end to end. The angle between the first groove segment and the length direction of the support is smaller than the angle between the second groove segment and the length direction of the support. When the first and second jaws begin to separate from their corresponding closed states, the first clamp releases its restriction on the pull rod, and the first protrusion slides within the first groove segment. When the first protrusion slides within the second groove segment, the first clamp moves to the left or right relative to the support. With this structure, the first groove segment helps reduce the resistance of the first clamp on the pull rod during the process of releasing its restriction, making the operation of pulling the pull rod easier.

[0016] Preferably, the pull rod is provided with an upwardly protruding second limiting part, and the lower end of the first clamping part is provided with a first lower limiting groove with a downward opening. When the pull rod slides along the pull rod slideway until the first claw and the second claw are closed, the second limiting part enters the first lower limiting groove from the downward opening of the first lower limiting groove, and the second limiting part limits the first lower limiting groove. With this structure, when the first claw and the second claw are closed, the first clamping part cannot move left or right, nor can the first clamping part drive the pull rod in the opposite direction, thus preventing the clamp of the loose-leaf book of this application from opening on its own.

[0017] Preferably, the bracket is provided with a clamping slide, the first clamping part is slidably mounted on the clamping slide, and a second clamping limiting groove is provided on one side of the clamping slide, the opening of the second clamping limiting groove facing the inner side of the clamping slide. A limiting flange protruding outward is provided on one side of the first clamping part. When the first claw and the second claw are closed correspondingly, the limiting flange enters into the second clamping limiting groove and is limited by the second clamping limiting groove. With this structure, excessive movement of the first clamping part is avoided, ensuring that there is no excessive contact after the first claw and the second claw are closed correspondingly.

[0018] Preferably, the bracket has a second tie rod limiting part above the tie rod slide rail. The second tie rod limiting part protrudes inward from the tie rod slide rail and is used to limit the tie rod in the direction perpendicular to the tie rod slide rail. A side clearance groove is provided on the side of the tie rod, which avoids the second tie rod limiting part. With this structure, the second tie rod limiting part can prevent the tie rod located in the tie rod slide rail from detaching from the bracket in the direction perpendicular to the tie rod slide rail; the side clearance groove facilitates the assembly and disassembly of the tie rod in the direction perpendicular to the tie rod slide rail.

[0019] Preferably, a first pull rod limiting part is provided inside the pull rod slide rail. When the pull rod slides upward along the pull rod slide rail until the first and second jaws are closed, the first pull rod limiting part limits the top end of the pull rod. This structure avoids excessive sliding of the pull rod, prevents the pull rod from causing the first clamp to shift along the pull rod slide rail, ensures that the travel distance of the first clamp remains constant, and ensures that the first and second jaws can close smoothly.

[0020] Preferably, the upper and lower parts of the bracket are each provided with a first clamp limiting part, and the inner side of the first clamp limiting part is provided with a hook structure. The upper and lower ends of the first clamp are respectively limited within the hook structure of the corresponding first clamp limiting part. With this structure, the first clamp is prevented from shifting along the length of the bracket, ensuring that the travel of the first clamp remains unchanged, and ensuring that the first jaw and the second jaw can close smoothly. Attached Figure Description

[0021] Figure 1 is an exploded view of Embodiment 1 of the binder for the loose-leaf book of this application.

[0022] Figure 2 is an enlarged view of the structure of region A in Figure 1.

[0023] Figure 3 is an enlarged view of the structure of region B in Figure 1.

[0024] Figure 4 is an enlarged view of the structure of the first groove in Figure 1.

[0025] Figure 5 is an exploded view of Embodiment 2 of the binder for the loose-leaf book of this application.

[0026] Figure 6 is an exploded view of Embodiment 3 of the binder for the loose-leaf book of this application.

[0027] Figure 7 is a schematic diagram of the structure of the loose-leaf book of this application.

[0028] Figure 8 is a schematic diagram of the internal structure of the loose-leaf book of this application.

[0029] As shown in the figure: 1. Bracket; 1-1. Cover limiting part; 1-2. First clamp limiting part; 1-3. First pull rod limiting part; 1-4. Cover connecting part; 1-5. Pull rod slide; 1-6. Clamp slide; 1-7. Second clamp limiting groove; 1-8. Second pull rod limiting part; 2. Pull rod; 2-1. Upper clearance part; 2-2. First limiting part; 2-3. First protrusion; 2-4. Lower clearance part; 2-5. Second limiting part; 2-6. Push-pull part; 2-7. Side clearance groove; 2-8. Second 3. Protruding post; 3. First clamping part; 3-1. First claw; 3-2. First upper clearance groove; 3-3. First upper limit groove; 3-4. First sliding groove; 3-41. Limiting flange; 3-42. First groove segment; 3-43. Second groove segment; 3-5. Limiting flange; 3-6. First lower clearance groove; 3-7. First lower limit groove; 4. Second clamping part; 4-1. Second claw; 4-2. Second upper clearance groove; 4-4. Second sliding groove; 4-6. Second lower clearance groove; 5. Cover; 6. Screw. Detailed Implementation

[0030] To better understand this application, various aspects of this application will be described in more detail with reference to the accompanying drawings. It should be understood that these detailed descriptions are merely illustrative of exemplary embodiments of this application and are not intended to limit the scope of this application in any way. Throughout the specification, the same reference numerals refer to the same elements.

[0031] In the accompanying drawings, the thickness, size, and shape of the objects have been slightly exaggerated for illustrative purposes. The drawings are for illustrative purposes only and are not drawn to scale.

[0032] It should also be understood that the terms "comprising," "having," "including," and "containing," when used in this specification, indicate the presence of the stated features, integrals, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or combinations thereof. Furthermore, when expressions such as "...at least one" appear after a list of listed features, they modify the entire listed feature, not individual elements in the list.

[0033] Example 1:

[0034] As shown in Figure 1, the binder of the loose-leaf book of this application includes a support 1, a pull rod 2, a first clamping part 3, and a second clamping part 4. The second clamping part 4 is fixedly mounted on the support 1. In this embodiment, the second clamping part 4 and the support 1 are an integral structure. The first clamping part 3 is provided with a plurality of semi-circular first claws 3-1, and the second clamping part 4 is provided with a plurality of semi-circular second claws 4-1.

[0035] As shown in Figures 2 and 3, a pull rod slide 1-5 is provided on the support 1 along its length. The pull rod 2 is slidably engaged within the pull rod slide 1-5, meaning the pull rod 2 is slidably connected to the support 1. A first pull rod limiting part 1-3 is provided within the pull rod slide 1-5, allowing the pull rod 2 to slide upwards along the pull rod slide 1-5 until the first pull rod limiting part 1-3 limits the top of the pull rod 2. A second pull rod limiting part 1-8 is provided on the support 1 above the pull rod slide 1-5. The second pull rod limiting part 1-8 protrudes inwards from the pull rod slide 1-5 and is used to limit the pull rod 2 in a direction perpendicular to the pull rod slide 1-5. A side clearance groove 2-7 is provided on the side of the pull rod 2, allowing the second pull rod limiting part 1-8 to be positioned.

[0036] A clamping slide 1-6 is provided on the bracket 1 above the pull rod slide 1-5, and the first clamping part 3 is provided on the clamping slide 1-6, that is, the first clamping part 3 is provided above the pull rod 2. The bracket 1 is provided with a first clamping limiting part 1-2 at both the upper and lower parts, and the first clamping part 3 is locked between the two first clamping limiting parts 1-2 from top to bottom.

[0037] The first clamping part 3 is provided with two first sliding grooves 3-4, and the pull rod 2 is provided with two first protrusions 2-3 that are inserted into and slidably engaged with the first sliding grooves 3-4, that is, the pull rod 2 and the first clamping part 3 are also slidably connected. When the pull rod 2 slides along the pull rod slide 1-5, the first protrusions 2-3 slide in the corresponding first sliding grooves 3-4, driving the first clamping part 3 to move laterally relative to the bracket 1, thereby causing the first claw 3-1 and the second claw 4-1 to close or separate accordingly.

[0038] As shown in Figure 4, a limiting flange 3-41 is provided on the wall of the first slide groove 3-4. When the first claw 3-1 and the second claw 4-1 are closed, the first protrusion 2-3 slides upward along the first slide groove 3-4 to the top of the limiting flange 3-41 and is limited by the limiting flange 3-41. That is, the first clamping part 3 limits the pull rod 2, so that the first claw 3-1 and the second claw 4-1 are closed stably and reliably. At this time, the first pull rod limiting part 1-3 limits the top of the pull rod 2.

[0039] The first slide groove 3-4 has a first groove segment 3-42 and a second groove segment 3-43 below the limiting flange 3-41. The angle between the first groove segment 3-42 and the length direction of the bracket 1 is smaller than the angle between the second groove segment 3-43 and the length direction of the bracket 1. When the first protrusion 2-3 disengages from the limiting flange 3-41, the first clamping part 3 releases the limiting of the pull rod 2, and the first protrusion 2-3 enters the first groove segment 3-42 and can slide along the first groove segment 3-42; when the first protrusion 2-3 enters the second groove segment 3-43 and slides along the second groove segment 3-43, the first clamping part 3 moves laterally in the direction in which the first claw 3-1 and the second claw 4-1 close or separate.

[0040] The first clamping part 3 is provided with a first upper limit groove 3-3, which has a downward opening. The pull rod 2 is provided with an upward protruding first limiting part 2-2. When the pull rod 2 slides upward along the pull rod slide 1-5 until the first claw 3-1 and the second claw 4-1 are closed, the first limiting part 2-2 enters the first upper limit groove 3-3 from the downward opening of the first upper limit groove 3-3 and is limited by the first upper limit groove 3-3, further ensuring that the first claw 3-1 and the second claw 4-1 are closed stably and reliably.

[0041] In addition, the pull rod 2 is provided with an upwardly protruding second limiting part 2-5, and the lower end of the first clamping part 3 is provided with a first lower limiting groove 3-7. The first lower limiting groove 3-7 is provided with a downward opening. When the pull rod 2 slides upward along the pull rod slide 1-5 until the first pawl 3-1 and the second pawl 4-1 are closed, the second limiting part 2-5 enters the first lower limiting groove 3-7 from the downward opening of the first lower limiting groove 3-7. The second limiting part 2-5 limits the first lower limiting groove 3-7 to prevent the first clamping part 3 from pulling the pull rod 2 in the opposite direction.

[0042] A second clamp limiting groove 1-7 is provided on one side of the clamp slide 1-6. The opening of the second clamp limiting groove 1-7 faces the inner side of the clamp slide 1-6. A limiting flange 3-5 protruding outward is provided on one side of the first clamping part 3. When the first pawl 3-1 and the second pawl 4-1 are closed accordingly, the limiting flange 3-5 enters the second clamp limiting groove 1-7 and is limited by the second clamp limiting groove 1-7.

[0043] The loose-leaf book clamp of this application has two cover connecting parts 1-4 on the support 1; the pull rod 2 is provided with an upper avoidance part 2-1 and a lower avoidance part 2-4 that respectively avoid the two cover connecting parts 1-4; and the first clamping part 3 is provided with a first upper avoidance groove 3-2 and a first lower avoidance groove 3-6 that respectively avoid the two cover connecting parts 1-4.

[0044] As shown in Figures 7 and 8, the loose-leaf notebook of this application includes a cover 5. A clamp for the loose-leaf notebook is provided on the outer side of the cover 5. A first claw 3-1 and a second claw 4-1 extend into the cover 5. Two screws 6 are provided inside the cover 5, passing through the cover 5 and correspondingly connecting to two cover connecting parts 1-4. A cover limiting part 1-1 is provided at the upper part of the support 1 to limit the upper end of the cover 5. A push-pull part 2-6 is provided at the lower end of the pull rod 2, which is perpendicular to the cover 5 and limited by the lower end of the cover 5 to the outside of the cover 5. The loose-leaf notebook of this application can contain a loose-leaf core composed of several loose-leaf sheets, which is clamped into a book by the first claw 3-1 and the second claw 4-1.

[0045] The loose-leaf notebook of this application uses a lever that slides relative to the support to open and close the clip, eliminating the need to forcefully press the first and second clips to unlock it, as is the case in existing technologies. This makes the operation simple and effortless. Furthermore, the clip of the loose-leaf notebook is located on the outside of the cover and will not overlap under the loose-leaf paper inside the cover, avoiding discomfort when writing. When the loose-leaf paper is unfolded, it lies directly on the cover, flat and without any feeling of being suspended, resulting in a better user experience.

[0046] Example 2:

[0047] As shown in Figure 5, the difference between the binder of this embodiment and that in Embodiment 1 is that the second clamping part 4 is not an integral structure with the support 1, but is set above the pull rod 2 and slidably connected to the support 1. The second clamping part 4 is provided with two second sliding grooves 4-4. Two first protrusions 2-3, which are correspondingly inserted into and slidably engaged with the first sliding groove 3-4, simultaneously pass through the corresponding second sliding grooves 4-4. The second sliding grooves 4-4 are arranged in opposite directions to the first sliding grooves 3-4. The second clamping part 4 is provided with a second upper clearance groove 4-2 and a second lower clearance groove 4-6 that respectively avoid the two cover connecting parts 1-4.

[0048] When the pull rod 2 slides along the pull rod slide 1-5, the first protrusion 2-3 simultaneously slides in the corresponding first slide groove 3-4 and second slide groove 4-4, driving the first clamping part 3 and the second clamping part 4 to move in opposite directions, that is, the first clamping part 3 and the second clamping part 4 move laterally in opposite directions, thereby causing the first pawl 3-1 and the second pawl 4-1 to close or separate accordingly.

[0049] Example 3:

[0050] As shown in Figure 6, the difference between the binder of this embodiment and that in Embodiment 1 is that the second clamping part 4 is not an integral structure with the support 1, but is set above the pull rod 2 and slidably connected to the support 1. The second clamping part 4 is provided with two second sliding grooves 4-4, and the pull rod 2 is provided with second protrusions 2-8 that are correspondingly inserted into and slidably engaged with the second sliding grooves 4-4. The second sliding grooves 4-4 are offset from the first sliding grooves 3-4 and have opposite structures, and the first clamping part 3 and the second clamping part 4 also avoid each other. The second clamping part 4 is provided with a second upper avoidance groove 4-2 and a second lower avoidance groove 4-6 that respectively avoid the two cover connecting parts 1-4.

[0051] When the pull rod 2 slides along the pull rod slide 1-5, the first protrusion 2-3 slides in the corresponding first slide groove 3-4, and the second protrusion 2-8 slides in the corresponding second slide groove 4-4. The pull rod 2 drives the first clamping part 3 and the second clamping part 4 to move in opposite directions, that is, the first clamping part 3 and the second clamping part 4 move laterally in opposite directions. The second clamping part 4 and the first clamping part 3 move towards each other, causing the first pawl 3-1 and the second pawl 4-1 to close accordingly. The second clamping part 4 and the first clamping part 3 move away from each other, causing the second pawl 4-1 to separate from the first pawl 3-1.

[0052] The above are merely specific embodiments of this application and are not intended to limit the scope of this application. Any modifications or equivalent substitutions made to this application without departing from the spirit and scope thereof shall be covered within the protection scope of the claims of this application.

Claims

1. A loose-leaf notebook, comprising a clamp and a cover (5), wherein the clamp comprises at least one set of first claws (3-1) and second claws (4-1), the first claws (3-1) and the second claws (4-1) being capable of correspondingly closing or separating, characterized in that, The clamp is located on the outside of the cover (5) and connected to the cover (5). The first claw (3-1) and the second claw (4-1) extend into the inside of the cover (5) and are used to fix the punched paper.

2. The loose-leaf notebook according to claim 1, characterized in that, The clamp includes a bracket (1), a pull rod (2), and a first clamping part (3). A first claw (3-1) is disposed on the first clamping part (3), and a second claw (4-1) is disposed on the bracket (1). The pull rod (2) is slidably connected to the bracket (1) and the first clamping part (3) respectively. The sliding of the pull rod (2) relative to the bracket (1) can drive the first clamping part (3) to slide relative to the bracket (1), so that the first claw (3-1) and the second claw (4-1) are closed or separated accordingly.

3. The loose-leaf notebook according to claim 2, characterized in that, The bracket (1) is provided with two cover connecting parts (1-4); the pull rod (2) is provided with an upper avoidance part (2-1) and a lower avoidance part (2-4) that respectively avoid the two cover connecting parts (1-4); the first clamp (3) is provided with a first upper avoidance groove (3-2) and a first lower avoidance groove (3-6) that respectively avoid the two cover connecting parts (1-4); two screws (6) are provided inside the cover (5), and the two screws (6) pass through the cover (5) and are connected to the two cover connecting parts (1-4) respectively.

4. The loose-leaf notebook according to claim 2, characterized in that, The top of the bracket (1) is provided with a cover limiting part (1-1), and the inner side of the cover limiting part (1-1) is provided with a hook structure. The upper end of the cover (5) is limited in the hook structure of the cover limiting part (1-1).

5. The loose-leaf notebook according to claim 2, characterized in that, A pull rod slide (1-5) is provided on the support (1) along the length direction of the support (1). The pull rod (2) is slidably engaged in the pull rod slide (1-5). At least one first groove (3-4) is provided on the first clamp (3). A first protrusion (2-3) is provided on the pull rod (2) and is inserted into and slidably engaged with the first groove (3-4). The pull rod (2) can slide along the pull rod slide (1-5) to make the first protrusion (2-3) slide in the corresponding first groove (3-4), driving the first clamp (3) to move to the left or right relative to the support (1), thereby driving the first claw (3-1) and the second claw (4-1) to close or separate accordingly.

6. The loose-leaf notebook according to claim 5, characterized in that, The lower end of the lever (2) is provided with a push-pull part (2-6). The push-pull part (2-6) is opposite to the lower end of the cover (5). Pulling the push-pull part (2-6) away from the lower end of the cover (5) can separate the first claw (3-1) from the second claw (4-1). Pushing the push-pull part (2-6) towards the lower end of the cover (5) can make the first claw (3-1) and the second claw (4-1) close accordingly.

7. The loose-leaf notebook according to claim 5, characterized in that, The first slide groove (3-4) has a limiting flange (3-41) on its groove wall. The first protrusion (2-3) slides upward along the first slide groove (3-4) below the limiting flange (3-41) so that the first claw (3-1) and the second claw (4-1) can close accordingly. When the first claw (3-1) and the second claw (4-1) are closed accordingly, the first protrusion (2-3) slides to the top of the limiting flange (3-41) and is limited by the limiting flange (3-41).

8. The loose-leaf notebook according to claim 5, characterized in that, The pull rod (2) slides upward along the pull rod slide (1-5) so that the first claw (3-1) and the second claw (4-1) can close accordingly; the first clamping part (3) is provided with a first upper limit groove (3-3), the first upper limit groove (3-3) is provided with a downward opening, and the pull rod (2) is provided with an upward protruding first limiting part (2-2). When the first claw (3-1) and the second claw (4-1) close accordingly, the first limiting part (2-2) enters the first upper limit groove (3-3) from the downward opening of the first upper limit groove (3-3) and is limited by the first upper limit groove (3-3).

9. The loose-leaf notebook according to claim 7 or 8, characterized in that, The first groove (3-4) includes a first groove segment (3-42) and a second groove segment (3-43) connected end to end. The angle between the first groove segment (3-42) and the length direction of the bracket (1) is smaller than the angle between the second groove segment (3-43) and the length direction of the bracket (1). When the first claw (3-1) and the second claw (4-1) start to separate from their corresponding closed states, the first clamp (3) releases the restriction on the pull rod (2), and the first protrusion (2-3) slides in the first groove segment (3-42). When the first protrusion (2-3) slides in the second groove segment (3-43), the first clamp (3) moves to the left or to the right relative to the bracket (1).

10. The loose-leaf notebook according to claim 5, characterized in that, The pull rod (2) is provided with an upwardly protruding second limiting part (2-5), and the lower end of the first clamp (3) is provided with a first lower limiting groove (3-7). The first lower limiting groove (3-7) is provided with a downward opening. When the pull rod (2) slides along the pull rod slide (1-5) until the first claw (3-1) and the second claw (4-1) are closed, the second limiting part (2-5) enters the first lower limiting groove (3-7) from the downward opening of the first lower limiting groove (3-7) and limits the first lower limiting groove (3-7).

11. The loose-leaf notebook according to claim 5, characterized in that, The bracket (1) is provided with a clamp slide (1-6), the first clamp (3) is slidably disposed on the clamp slide (1-6), the clamp slide (1-6) is provided with a second clamp limiting groove (1-7) on one side, the opening of the second clamp limiting groove (1-7) faces the inside of the clamp slide (1-6), and the first clamp (3) is provided with a limiting flange (3-5) protruding outward on one side; when the first claw (3-1) and the second claw (4-1) are closed in correspondence, the limiting flange (3-5) enters the second clamp limiting groove (1-7) and is limited by the second clamp limiting groove (1-7).

12. The loose-leaf notebook according to claim 5, characterized in that, A second pull rod limiting part (1-8) is provided on the bracket (1) above the pull rod slide (1-5). The second pull rod limiting part (1-8) protrudes into the inside of the pull rod slide (1-5) and is used to limit the pull rod (2) in the direction perpendicular to the pull rod slide (1-5). A side clearance groove (2-7) is provided on the side of the pull rod (2) and the side clearance groove (2-7) avoids the second pull rod limiting part (1-8).

13. The loose-leaf notebook according to claim 5, characterized in that, A first pull rod limiting part (1-3) is provided in the pull rod slide (1-5). When the pull rod (2) slides upward along the pull rod slide (1-5) until the first claw (3-1) and the second claw (4-1) are closed, the first pull rod limiting part (1-3) limits the top end of the pull rod (2).

14. The loose-leaf notebook according to claim 5, characterized in that, The bracket (1) is provided with a first clamp limiting part (1-2) at both the upper and lower parts. The inner side of the first clamp limiting part (1-2) is provided with a hook structure. The upper and lower ends of the first clamp (3) are respectively limited in the hook structure of the corresponding first clamp limiting part (1-2).

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