Loose-leaf clamp and loose-leaf notebook

Abstract

The utility model relates to a loose-leaf clamp and a loose-leaf notebook, the loose-leaf clamp comprises a first base part and a second base part, a first semi-ring is arranged on the first base part, a second semi-ring is arranged on the second base part, and the first base part is hinged to the second base part; a first buckling part is arranged at the end of the first semi-ring, a second buckling part is arranged at the end of the second semi-ring, the first buckling part and the second buckling part are correspondingly connected in a buckled mode to lock the first semi-ring and the second semi-ring, a first sliding fit face is arranged on the side of the first buckling part, and a second sliding fit face is arranged on the side of the second buckling part. When the first buckling part and the second buckling part move reversely in the direction perpendicular to the plane where the first semi-ring and the second semi-ring are located, the first sliding fit face can be in sliding fit with the second sliding fit face to unlock the first semi-ring and the second semi-ring. According to the loose-leaf binder, the clamping jaws on the two sides of the loose-leaf binder can be separated through one-hand operation, and use convenience is greatly improved.

Description

Technical Field

[0001] This utility model relates to the technical field of stationery, and more specifically to a loose-leaf binder and a loose-leaf notebook. Background Technology

[0002] Loose-leaf notebooks allow for easy addition or deletion of pages, and the entire page can be laid flat without folding or pressing the inside, making them very popular. However, the binders used in most loose-leaf notebooks on the market require applying pressure to the side clips circumferentially before opening, then changing the direction of force to separate the clips axially or radially. This makes them difficult to operate with one hand. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a binder that allows the grippers on both sides of the binder to be separated by one hand, which greatly improves the convenience of use.

[0004] The technical solution of this utility model is to provide a loose-leaf binder, including a first base and a second base. At least one first half-ring is provided on the first base, and at least one second half-ring is provided on the second base. The first and second bases are hinged so that the first and second half-rings can open and close in a one-to-one correspondence. At least one first half-ring has a first fastening part at its end, and at least one second half-ring has a second fastening part at its end. The first and second fastening parts are correspondingly snapped together to lock the first and second half-rings. The side of the first fastening part has a first sliding engagement surface, and the side of the second fastening part has a second sliding engagement surface. In a direction perpendicular to the plane containing the first and second half-rings, the first and second sliding engagement surfaces mutually limit each other. When the first and second fastening parts move in opposite directions perpendicular to the plane containing the first and second half-rings, the first sliding engagement surface can slide and engage with the second sliding engagement surface to release the locking of the first and second half-rings.

[0005] Compared with the prior art, the binder of this utility model has the following advantages:

[0006] The loose-leaf clip of this utility model can be opened with one hand, which is convenient to operate. When it is necessary to open the loose-leaf clip of this utility model, you only need to pinch the locked first half ring and second half ring with one hand, so that the first fastening part moves in the opposite direction to the second fastening part in a direction perpendicular to the plane where the first half ring and second half ring are located, and the locking of the first half ring and second half ring can be released.

[0007] Preferably, the first engaging portion includes a first protrusion, and both the left and right sides of the first protrusion are provided with a first sliding engagement surface, i.e., a first unlocking guide slope; the second engaging portion includes a second recess, and both the inner left and inner right sides of the second recess are provided with a second sliding engagement surface, i.e., a second unlocking engagement slope; the first protrusion and the second recess engage in a concave-convex fit, and the first unlocking guide slope and the second unlocking engagement slope are correspondingly slidably engaged. With this structure, the concave-convex fit between the first protrusion and the second recess ensures a stable, reliable, and secure snap-fit ​​connection between the first and second engaging portions; while the corresponding sliding engagement of the first unlocking guide slope and the second unlocking engagement slope facilitates the sliding unlocking of the first engaging portion relative to the second engaging portion in a direction perpendicular to the plane containing the first and second half-rings, resulting in a smooth and unobstructed unlocking operation; and in the direction perpendicular to the plane containing the first and second half-rings, whether the first engaging portion slides upwards or downwards relative to the second engaging portion, it can smoothly release the lock on the first and second half-rings, allowing for one-handed bidirectional unlocking.

[0008] Preferably, the first engaging portion includes a first recess, and both the inner left and inner right sides of the first recess are provided with first unlocking engagement slopes; the second engaging portion includes a second protrusion, and both the left and right sides of the second protrusion are provided with second unlocking guide slopes; the first recess and the second protrusion engage in a concave-convex fit, and the second unlocking guide slopes slide in a corresponding fit with the first unlocking engagement slopes. With this structure, the concave-convex fit between the first recess and the second protrusion further strengthens the snap-fit ​​connection between the first and second engaging portions; while the sliding fit between the second unlocking guide slopes and the first unlocking engagement slopes also facilitates the sliding unlocking of the first engaging portion relative to the second engaging portion in a direction perpendicular to the plane containing the first and second half-rings, making the unlocking operation smooth and unobstructed, and not hindering one-handed two-way unlocking.

[0009] Preferably, the rear side of the first protrusion is a first engaging surface, and the rear side of the second protrusion is provided with a second engaging surface. The first protrusion and the second protrusion are snapped together, and the first engaging surface and the second engaging surface abut and slide together. This structure ensures a stable and reliable snap-fit ​​connection between the first and second engaging parts, while avoiding increased contact between them in the direction perpendicular to the plane containing the first and second half-rings, thus ensuring a smooth and unobstructed unlocking operation.

[0010] Preferably, the front side of the first protrusion is provided with a first engaging guide slope, and the front side of the second protrusion is provided with a second engaging guide slope. The first engaging guide slope and the second engaging guide slope can slide to engage and connect the first protrusion and the second protrusion. The inner rear side of the first concave portion is provided with a first engaging engagement slope, and the inner rear side of the second concave portion is provided with a second engaging engagement slope. When the first protrusion and the second protrusion are engaged, the first engaging guide slope and the second engaging engagement slope slide to engage, and the second engaging guide slope and the first engaging engagement slope slide to engage. With this structure, when the first and second engaging parts are connected, the sliding engagement of the first and second engaging guide slopes reduces the contact between them, making the locking operation smooth and unobstructed. When the first and second protrusions are connected, the sliding engagement of the first and second engaging slopes and the second engaging guide slopes increases the fit between the first and second concave parts and the first and second concave parts, making the connection between the first and second protrusions stable and reliable. Furthermore, when unlocking the first engaging part relative to the second engaging part, there is no increase in contact between them in the direction perpendicular to the plane containing the first and second half-rings, making the unlocking operation smooth and unobstructed.

[0011] Preferably, a plurality of first half-rings are provided on the first base, and a plurality of second half-rings are provided on the second base. The first half-rings with first engaging portions are located in the middle of the first base, and correspondingly, the second half-rings with second engaging portions are located in the middle of the second base. This structure minimizes the number of first and second engaging portions, saving costs while ensuring reliable locking between the first and second half-rings and facilitating unlocking.

[0012] Preferably, a plurality of first half-rings are provided on the first base, and a plurality of second half-rings are provided on the second base. Two first half-rings are provided with first engaging portions, located at the beginning and end of the first base, respectively. Correspondingly, two second half-rings are provided with second engaging portions, located at the beginning and end of the second base, respectively. This structure, using a smaller number of first and second engaging portions, greatly ensures the locking reliability of the first and second half-rings.

[0013] Preferably, a plurality of first half-rings are provided on the first base, and a plurality of second half-rings are provided on the second base. At least one first half-ring has an insertion hole at its end, and at least one second half-ring has an insertion post at its end. When the first and second half-rings are locked, the insertion post is inserted into the corresponding insertion hole. This structure, by providing insertion holes on the first half-rings without first engaging parts and insertion posts on the second half-rings without second engaging parts, improves the accuracy of the one-to-one closure of the first and second half-rings and ensures that the first half-rings with first engaging parts and the second half-rings with second engaging parts can be successfully locked each time.

[0014] Preferably, the first base has at least one arc-shaped groove, the outer edge of which is configured as an arc-shaped snap-fit ​​connector. The second base has a rotating shaft and at least one snap-fit ​​hole, with the arc-shaped snap-fit ​​connector correspondingly inserted into the snap-fit ​​hole, and the rotating shaft rotatably snapped into the arc-shaped groove. This structure facilitates a reliable hinge connection between the first and second bases and also allows for separate processing and manufacturing of the first and second bases, saving costs.

[0015] This utility model also provides a loose-leaf notebook, which allows the claws on both sides of the loose-leaf clip to separate with one hand, greatly improving the convenience of adding or removing loose-leaf paper.

[0016] The technical solution of this utility model is to provide a loose-leaf notebook, which includes a plurality of loose-leaf sheets and a loose-leaf clip as described above, wherein the loose-leaf sheets are held into a book by at least one of the loose-leaf clips.

[0017] Compared with the prior art, the loose-leaf notebook of this utility model has the following advantages:

[0018] This utility model's loose-leaf clip can be opened with one hand, making it convenient to add or remove loose-leaf sheets. When it is necessary to add or remove loose-leaf sheets, simply pinch the locked first half ring and second half ring with one hand, and slide the first locking part axially relative to the second locking part to release the lock on the first half ring and second half ring, thus opening the loose-leaf clip of this utility model. Moreover, whether the first locking part slides axially upward or downward relative to the second locking part, it can smoothly release the lock on the first half ring and second half ring, that is, it can be unlocked by one hand in both directions. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the closed state of the hinge clamp of this utility model.

[0020] Figure 2 for Figure 1 The left view.

[0021] Figure 3 This is an exploded view of the hinge holder of this utility model.

[0022] Figure 4 for Figure 3 Front view.

[0023] Figure 5 This is a schematic diagram of the structure of the first engaging part of the hinge clamp of this utility model.

[0024] Figure 6 This is a schematic diagram of the second fastening part of the hinge clamp of this utility model.

[0025] As shown in the figure: 1. First base, 1-1. Arc-shaped groove, 1-2. Arc-shaped connector, 2. Second base, 2-1. Rotating shaft, 2-2. Snap-fit ​​hole, 3. First half-ring, 3-1. Insertion hole, 4. Second half-ring, 4-1. Insertion post, 5. First fastening part, 5-1. First protrusion, 5-2. First concave part, 5-3. First fastening guide slope, 5-4. First fastening mating slope, 5-5. First unlocking guide slope, 5-6. First unlocking mating slope, 5-7. First fastening surface, 6. Second fastening part, 6-1. Second protrusion, 6-2. Second concave part, 6-3. Second fastening guide slope, 6-4. Second fastening mating slope, 6-5. Second unlocking guide slope, 6-6. Second unlocking mating slope, 6-7. Second fastening surface. Detailed Implementation

[0026] 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.

[0027] 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.

[0028] 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.

[0029] In this utility model, the side of the first protrusion 5-1 opposite to the end of the first semi-ring 3 is designated as the front side, and the side of the first protrusion 5-1 away from the end of the first semi-ring 3 is designated as the rear side. The two sides of the first protrusion 5-1 opposite to the first semi-ring 3 are the left side and the right side, respectively. The inner wall of the end of the first recess 5-2 away from the first semi-ring 3 is designated as the inner rear side, and the side walls of the first recess 5-2 on both sides of its inner rear side are the inner left side and the inner right side, respectively.

[0030] Similarly, the side of the second protrusion 6-1 opposite to the end of the second semi-ring 4 is designated as the front side, and the side of the second protrusion 6-1 away from the end of the second semi-ring 4 is designated as the rear side. The two sides of the second protrusion 6-1 opposite to the second semi-ring 4 are the left side and the right side, respectively. The inner wall of the end of the second recess 6-2 away from the second semi-ring 4 is designated as its inner rear side, and the side walls of the second recess 6-2 on both sides of its inner rear side are its inner left side and inner right side, respectively.

[0031] In this invention, the direction perpendicular to the plane containing the first half-ring 3 and the second half-ring 4 is also designated as the axial direction of the hinge clamp of this invention. Example 1

[0032] like Figure 1 and Figure 2 As shown in the figure, the hinge holder of this embodiment includes a first base 1 and a second base 2. A plurality of first half rings 3 are provided on the first base 1, and a plurality of second half rings 4 are provided on the second base 2. The first half rings 3 and the second half rings 4 are closed to form a ring in a one-to-one correspondence.

[0033] like Figure 3 and Figure 4 As shown, the first base 1 is provided with several arc-shaped slots 1-1, and the outer edge of the arc-shaped slots 1-1 is provided with arc-shaped connectors 1-2. The second base 2 is provided with a rotating shaft 2-1 and several locking holes 2-2. The arc-shaped connectors 1-2 are inserted into the locking holes 2-2 respectively, and the rotating shaft 2-1 can be rotatably locked into the arc-shaped slots 1-1. In this way, the first base 1 and the second base 2 are hinged, so that the first half ring 3 and the second half ring 4 can be opened and closed in a one-to-one correspondence.

[0034] like Figure 3As shown, the ends of the first half-rings 3 at both ends of the first base 1 are provided with first fastening parts 5, which are located on the inner sidewalls of the first half-rings 3. The ends of the second half-rings 4 at both ends of the second base 2 are provided with second fastening parts 6, which are located on the outer sidewalls of the second half-rings 4. The first fastening parts 5 and the second fastening parts 6 can be stacked vertically to achieve a snap-fit ​​connection, thereby locking the first half-rings 3 and the second half-rings 4. The ends of the other first half-rings 3 located in the middle of the first base 1 are provided with insertion holes 3-1, and the ends of the other second half-rings 4 located in the middle of the second base 2 are provided with insertion posts 4-1. When the first half-rings 3 and the second half-rings 4 are locked, the insertion posts 4-1 are inserted into the insertion holes 3-1 one by one.

[0035] like Figure 5 As shown, the first engaging portion 5 includes a first protrusion 5-1 and a first recess 5-2; the front side of the first protrusion 5-1 is provided with a first engaging guide slope 5-3, the rear side of the first protrusion 5-1 is provided with a first engaging surface 5-7, and the left and right sides of the first protrusion 5-1 are both provided with first unlocking guide slopes 5-5; the inner rear side of the first recess 5-2 is provided with a first engaging mating slope 5-4, and the inner left and inner right sides of the first recess 5-2 are both provided with first unlocking mating slopes 5-6. In this embodiment, the first unlocking guide slope 5-5 and the first unlocking mating slope 5-6 can both be summarized as first sliding mating surfaces.

[0036] like Figure 6 As shown, the second engaging portion 6 includes a second protrusion 6-1 and a second recess 6-2. The front side of the second protrusion 6-1 is provided with a second engaging guide slope 6-3, the rear side of the second protrusion 6-1 is provided with a second engaging surface 6-7, and both the left and right sides of the second protrusion 6-1 are provided with second unlocking guide slopes 6-5. The inner rear side of the second recess 6-2 is provided with a second engaging mating slope 6-4, and both the inner left and inner right sides of the second recess 6-2 are provided with second unlocking mating slopes 6-6. In this embodiment, both the second unlocking guide slope 6-5 and the second unlocking mating slope 6-6 can be considered as second sliding mating surfaces.

[0037] When it is necessary to lock the first half ring 3 and the second half ring 4, the first half ring 3 and the second half ring 4 are rotated towards each other. The first snap-fit ​​guide slope 5-3 and the second snap-fit ​​guide slope 6-3 can slide to engage so that the first concave part 5-2 and the second convex part 6-1 are engaged in a concave-convex fit, and the second concave part 6-2 and the first convex part 5-1 are engaged in a concave-convex fit. At this time, the first snap-fit ​​surface 5-7 and the second snap-fit ​​surface 6-7 abut against each other, and the first convex part 5-1 and the second convex part 6-1 are snapped together.

[0038] In this invention, the first engaging surface 5-7 and the second engaging surface 6-7 can slide together, and the first engaging guide slope 5-3 and the second engaging engagement slope 6-4 can slide together, improving the fit between the second concave part 6-2 and the first convex part 5-1. The second engaging guide slope 6-3 and the first engaging engagement slope 5-4 can also slide together, improving the fit between the first concave part 5-2 and the second convex part 6-1, so that the first half-ring 3 and the second half-ring 4 can be reliably locked.

[0039] Simultaneously, the first unlocking guide slope 5-5 and the second unlocking engagement slope 6-6 are in corresponding sliding engagement, and the second unlocking guide slope 6-5 and the first unlocking engagement slope 5-6 are also in corresponding sliding engagement. When it is necessary to unlock the first half-ring 3 and the second half-ring 4, one hand pinches the first engaging part 5 and the second engaging part 6 and slides them axially relative to each other. Even if the first engaging part 5 and the second engaging part 6 slide relative to each other in a direction perpendicular to the plane containing the first half-ring 3 and the second half-ring 4, the first protrusion 5-1 will slide axially out of the second recess 6-2, and simultaneously the second protrusion 6-1 will slide axially out of the first recess 5-2, thus releasing the lock between the first half-ring 3 and the second half-ring 4. The first engaging part 5 can slide axially downwards or upwards relative to the second engaging part 6, both of which can unlock the first engaging part 5 and the second engaging part 6, separating the first half-ring 3 and the second half-ring 4.

[0040] In other embodiments, a first unlocking guide slope 5-5 and a first unlocking engagement slope 5-6 may be provided only on one side of the first fastening part 5, while a second unlocking guide slope 6-5 and a second unlocking engagement slope 6-6 may be provided on one side of the second fastening part 6. In this way, the first fastening part 5 can only slide relative to the second fastening part 6 in one direction to unlock the first fastening part 5 and the second fastening part 6, so that the first half ring 3 and the second half ring 4 are separated.

[0041] This utility model of loose-leaf notebook uses the loose-leaf clips of this utility model to hold several loose-leaf sheets together to form a book. The number of loose-leaf clips can be selected according to the length of the binding side of the loose-leaf sheets. Example 2

[0042] The difference between the hinge clamp in this embodiment and that in embodiment 1 is that there is only one first half-ring 3 with the first fastening part 5, and it is located in the middle of the first base 1. Correspondingly, there is only one second half-ring 4 with the second fastening part 6, and it is located in the middle of the second base 2. Example 3

[0043] The difference between the loose-leaf clamp in this embodiment and that in embodiment 1 is that the first fastening part 5 only includes a first protrusion 5-1, and the left and right sides of the first protrusion (5-1) are provided with a first sliding mating surface, which is a curved surface; the second fastening part 6 only includes a second recess 6-2, and the inner left and inner right sides of the second recess 6-2 are provided with a second sliding mating surface, which is also a curved surface; the first sliding mating surface and the second sliding mating surface can slide together to allow the first protrusion 5-1 to slide out of the second recess 6-2. Example 4

[0044] The difference between the loose-leaf clamp in this embodiment and that in embodiment 1 is that the ends of the other first half-rings 3 without the first fastening part 5 and the ends of the other second half-rings 4 without the second fastening part 6 are not provided with a plug-in engagement structure. When the first half-rings 3 and the second half-rings 4 are locked, the ends of the first half-rings 3 without the first fastening part 5 and the ends of the second half-rings 4 without the second fastening part 6 are opposite to or connected to each other, which does not affect the effect of the loose-leaf clamp of this utility model in holding several loose-leaf papers.

[0045] The above are merely specific embodiments of this utility model and are not intended to limit the scope of implementation of this utility model. Any modifications or equivalent substitutions to this utility model without departing from its spirit and scope should be covered within the protection scope of the claims of this utility model.

Claims

1. A hinged binder, comprising a first base (1) and a second base (2), wherein at least one first half-ring (3) is disposed on the first base (1), and at least one second half-ring (4) is disposed on the second base (2), wherein the first base (1) and the second base (2) are hinged such that the first half-ring (3) and the second half-ring (4) can open and close in a one-to-one correspondence; characterized in that, At least one first half-ring (3) has a first fastening part (5) at its end, and at least one second half-ring (4) has a second fastening part (6) at its end. The first fastening part (5) can be engaged with the second fastening part (6) to lock the first half-ring (3) and the second half-ring (4). The side of the first fastening part (5) has a first sliding mating surface, and the side of the second fastening part (6) has a second sliding mating surface. In a direction perpendicular to the plane where the first half-ring (3) and the second half-ring (4) are located, the first sliding mating surface and the second sliding mating surface limit each other. When the first fastening part (5) and the second fastening part (6) move in opposite directions in a direction perpendicular to the plane where the first half-ring (3) and the second half-ring (4) are located, the first sliding mating surface can slide and engage with the second sliding mating surface to release the lock of the first half-ring (3) and the second half-ring (4).

2. The loose-leaf binder according to claim 1, characterized in that, The first engaging part (5) includes a first protrusion (5-1), and the left and right sides of the first protrusion (5-1) are provided with a first sliding mating surface, namely a first unlocking guide slope (5-5); the second engaging part (6) includes a second recess (6-2), and the inner left and inner right sides of the second recess (6-2) are provided with a second sliding mating surface, namely a second unlocking mating slope (6-6); the first protrusion (5-1) and the second recess (6-2) are in concave-convex mating, and the first unlocking guide slope (5-5) and the second unlocking mating slope (6-6) are in corresponding sliding mating.

3. The loose-leaf binder according to claim 2, characterized in that, The first engaging part (5) includes a first recess (5-2), and the inner left side and inner right side of the first recess (5-2) are provided with a first unlocking engagement slope (5-6); the second engaging part (6) includes a second protrusion (6-1), and the left side and right side of the second protrusion (6-1) are provided with a second unlocking guide slope (6-5); the first recess (5-2) and the second protrusion (6-1) are in concave-convex engagement, and the second unlocking guide slope (6-5) and the first unlocking engagement slope (5-6) are in corresponding sliding engagement.

4. The loose-leaf binder according to claim 3, characterized in that, The rear side of the first protrusion (5-1) is the first fastening surface (5-7), and the rear side of the second protrusion (6-1) is provided with the second fastening surface (6-7). The first protrusion (5-1) and the second protrusion (6-1) are snapped together, and the first fastening surface (5-7) and the second fastening surface (6-7) abut and slide together.

5. The loose-leaf binder according to claim 4, characterized in that, The front side of the first protrusion (5-1) is provided with a first snap-fit ​​guide slope (5-3), and the front side of the second protrusion (6-1) is provided with a second snap-fit ​​guide slope (6-3). The first snap-fit ​​guide slope (5-3) and the second snap-fit ​​guide slope (6-3) can slide to engage so that the first protrusion (5-1) and the second protrusion (6-1) are snapped together. The inner rear side of the first recess (5-2) is provided with a first snap-fit ​​slope (5-4), and the inner rear side of the second recess (6-2) is provided with a second snap-fit ​​slope (6-4). When the first protrusion (5-1) and the second protrusion (6-1) are snapped together, the first snap-fit ​​guide slope (5-3) and the second snap-fit ​​slope (6-4) slide to engage, and the second snap-fit ​​guide slope (6-3) and the first snap-fit ​​slope (5-4) slide to engage.

6. The loose-leaf binder according to any one of claims 1 to 5, characterized in that, The first base (1) is provided with a plurality of first half rings (3), and the second base (2) is provided with a plurality of second half rings (4). The first half rings (3) provided with first fastening parts (5) are located in the middle of the first base (1), and correspondingly, the second half rings (4) provided with second fastening parts (6) are located in the middle of the second base (2).

7. The loose-leaf binder according to any one of claims 1 to 5, characterized in that, The first base (1) is provided with a number of first half rings (3), and the second base (2) is provided with a number of second half rings (4). There are two first half rings (3) with first fastening parts (5) respectively located at the head and tail of the first base (1). Correspondingly, there are two second half rings (4) with second fastening parts (6) respectively located at the head and tail of the second base (2).

8. The loose-leaf binder according to any one of claims 1 to 5, characterized in that, The first base (1) is provided with a plurality of first half rings (3), and the second base (2) is provided with a plurality of second half rings (4). At least one first half ring (3) has a plug hole (3-1) at its end, and at least one second half ring (4) has a plug post (4-1) at its end. When the first half ring (3) and the second half ring (4) are locked, the plug post (4-1) is inserted into the plug hole (3-1).

9. The loose-leaf binder according to any one of claims 1 to 5, characterized in that, The first base (1) is provided with at least one arc-shaped slot (1-1), and the outer edge of the arc-shaped slot (1-1) is provided with an arc-shaped connector (1-2). The second base (2) is provided with a rotating shaft (2-1) and at least one snap-fit ​​hole (2-2). The arc-shaped connector (1-2) is inserted into the snap-fit ​​hole (2-2), and the rotating shaft (2-1) is rotatably snapped into the arc-shaped slot (1-1).

10. A loose-leaf notebook, characterized in that, It includes a plurality of loose-leaf sheets and a loose-leaf clamp as described in any one of claims 1 to 9, wherein the loose-leaf sheets are held into a book by at least one of the loose-leaf clamps.

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