Butterfly buckle type clamping ring and loose-leaf notebook

Abstract

The utility model discloses a butterfly buckle type clamping ring, which belongs to the technical field of stationery and comprises at least one clamping unit, each clamping unit consists of a main body ring and an insertion tongue piece which are mutually inserted, each main body ring comprises a base plate, a clamping plate is arranged on the upper surface of each base plate, and the clamping plates are arranged on the upper surfaces of the base plates. A first flexible joint fork extending upwards is arranged on the side, flush with the clamping plate, of the base plate, a second flexible joint fork extending upwards is arranged on the top face of the clamping plate, the first flexible joint fork and the second flexible joint fork are each provided with a bottom end and a top end which are opposite, the bottom end of the first flexible joint fork is fixedly connected with the base plate, and the top end of the first flexible joint fork is fixedly connected with the clamping plate. The lower end of the second flexible joint fork is fixedly connected with the clamping plate, the top end is a free end, and the free ends of the second flexible joint fork and the clamping plate are detachably connected through an insertion tongue piece. The butterfly buckle type clamping and fixing ring has better bendability and durability, facilitates disassembly and assembly of the loose-leaf notebook, is small in size and convenient to carry, and can ensure that the service life of the loose-leaf notebook is longer.

Description

Technical Field

[0001] The utility model belongs to the technical field of stationery, specifically relates to loose-leaf binding technology, and provides a butterfly buckle type clamping ring and a loose-leaf notebook. Background Art

[0002] A loose-leaf notebook is a commonly used stationery item, which consists of a cover, loose-leaf clips or coils, and paper. It is a notebook in which the paper inside can be freely removed and added. The biggest difference from an ordinary notebook is that the loose-leaf notebook is more flexible in use. The paper can be easily disassembled, replaced, combined, and sorted.

[0003] A loose-leaf clip is a clip used to fix paper, mainly in a circular shape, mostly made of metal or plastic. When disassembling the paper, just gently open the loose-leaf clip. However, it is generally fixed to the cover by two rivets, resulting in very inconvenient assembly and low assembly efficiency. For example, the Chinese invention patent application with the publication number CN111452535A involves a loose-leaf clip. The disadvantages of this loose-leaf clip are that its binding tool is made of plastic and is easily crushed or broken; the structure is relatively complex and is easily damaged if used improperly; the material is relatively hard, which is easy to hurt the hand and has a poor hand feeling. Summary of the Utility Model

[0004] In view of this, the utility model proposes a butterfly buckle type clamping ring and a loose-leaf notebook, aiming to solve the problems of inconvenient use and short service life of the existing loose-leaf clip.

[0005] To achieve the above object, the utility model provides the following technical solutions:

[0006] The utility model provides a butterfly buckle type clamping ring, which includes at least one clamping unit. A single clamping unit is composed of a main body ring and a tongue piece that are inserted into each other. The main body ring includes a base plate. A clamping plate is provided on the upper surface of the base plate. A first flexible engaging fork extending upward is provided on one side of the base plate flush with the clamping plate. A second flexible engaging fork extending upward is provided on the top surface of the clamping plate. Both the first flexible engaging fork and the second flexible engaging fork have their respective opposite bottom ends and top ends. The bottom end of the first flexible engaging fork is fixedly connected to the base plate. The low end of the second flexible engaging fork is fixedly connected to the clamping plate. The top end is a free end, and the free ends of the two are detachably connected through the tongue piece. In this way, due to the simplification of the design structure, users can quickly replace and sort the paper, improving the use efficiency of the loose-leaf notebook; the use of flexible materials and structural design can reduce the damage risk under frequent operations and extend the service life of the loose-leaf clip; at the same time, since the clamping unit can adapt to papers of different thicknesses, users can freely add or remove papers according to needs, improving the flexibility of the loose-leaf notebook; and this design can make the whole loose-leaf notebook lighter and more convenient to carry, meeting the needs of students and working people.

[0007] Preferably, a clamping plate is provided on the substrate near the first flexible joint fork, and the cross-section of the clamping plate is T-shaped or mushroom-shaped. A clamping groove that is symmetric about the left and right and is used to clamp the back cover of the loose-leaf notebook is formed between the clamping plate and the substrate. In this way, due to the design of the clamping groove, the back cover of the loose-leaf notebook will be subjected to more uniform pressure during clamping, reducing deformation or damage caused by use. When the user replaces the paper, the clamping ring can be quickly and easily opened and closed, improving the convenience and efficiency of use. This clamping groove design can also adapt to back covers of different thicknesses and materials, increasing the versatility of the product. The T-shaped or mushroom-shaped design is not only highly functional but also adds an aesthetic appearance to the loose-leaf notebook, attracting the user's attention and being more likely to be popular among young consumers.

[0008] Preferably, the main body ring and the tongue piece are each an integrally formed structure and are made of a soft material, and the tongue piece is made of hard rubber and the main body ring is made of soft silicone. In this way, the integrally formed design simplifies the usage process. The user only needs to easily insert or remove the tongue piece without worrying about the separation or loss of components. Moreover, the hard rubber tongue piece improves wear resistance and can withstand frequent use without being easily damaged, extending the service life of the product. The soft silicone main body ring can fit well with papers and back covers of different thicknesses, ensuring the stability of the papers in the loose-leaf notebook. Soft silicone is more user-friendly in terms of touch, effectively reducing the discomfort of the user during use and enhancing the overall experience.

[0009] Preferably, the lower bottom surface of the substrate is provided with an inclined surface that thins out outward in the thickness direction of the substrate and away from the first flexible joint fork. This gradually changing inclined surface design can make the contact area of the substrate smoother, so that when the substrate contacts a surface such as a tabletop, the loose-leaf notebook can be placed flat better, providing better writing comfort.

[0010] Preferably, both the first flexible joint fork and the second flexible joint fork extend upward in an inwardly curved or inwardly bent shape, and the free ends of the two are in a shape of a circle, a square, or a D shape after being connected by the tongue piece; a first joint is provided at the free end of the first flexible joint fork, and a second joint is provided at the free end of the second flexible joint fork, and the first joint and the second joint are in a convex-concave matching structure. In this way, the inwardly curved design makes the clamping effect better and enhances the clamping stability; due to the convex-concave matching of the joint design, the user can more easily find the appropriate position when inserting and removing the tongue piece, simplifying the operation steps and improving the convenience of use. The various shape options for the free ends enable this design to meet the needs of different users, enhancing the market attractiveness of the loose-leaf notebook. The diverse shape designs not only increase functionality but also enhance the overall aesthetics, making the loose-leaf notebook more visually appealing.

[0011] Preferably, a first slot is provided at the free end of the first flexible engagement fork, and a second slot is provided at the free end of the second flexible engagement fork. The tongue piece has an arcuate butterfly buckle structure and has a first plug and a second plug opposite to the first plug through a necking. The first plug is adapted to the first slot, and the second plug is adapted to the second slot. In this way, the matching design of the slot and the plug can effectively prevent the tongue piece from accidentally falling off during use, increasing the overall safety and reliability. Moreover, due to the optimized structure, the user can insert and pull out the tongue piece more smoothly, reducing the resistance during operation and improving the convenience of use. The arcuate shape and the slot design enhance the aesthetics of the product while maintaining its functionality, enhancing the market competitiveness of the product.

[0012] Preferably, the outer contour of the first plug has a polygon structure similar to an ellipse, and at least one surface in its thickness direction is provided with an inclined surface extending outward and thinning; the outer contour of the second plug has a conical structure similar to a cone, and at least one surface in its thickness direction is provided with an inclined surface extending outward and thinning. In this way, the design of the polygon similar to an ellipse and the conical structure can provide a better positioning effect, ensuring that the plug can be firmly fixed in the slot when inserted and avoiding loosening caused by improper operation. The inclined surface design with thinning makes it easier for the user to insert and remove the plug, reducing the friction and resistance during use and enhancing the overall convenience of use. At the same time, due to the smooth contact between the plug and the slot, the friction and wear during use are reduced, extending the service life of the loose-leaf notebook. The appearance design of the polygon similar to an ellipse and the conical structure adds a modern and aesthetic feeling, helping to attract more users, especially being more popular among young consumers.

[0013] Preferably, two clamping units are arranged side by side to form an integral bendable structure, and the substrates provided on the main rings of the two clamping units are connected together, and a bending groove is provided at the connection, and a reinforcing strip is provided on the bending groove. In this way, the combination of the integral bendable design and the reinforcing strip can effectively improve the compressive resistance and bending resistance of the clamping unit, ensuring the durability during use.

[0014] Preferably, the detachable connection structure is as follows: one end of the tongue piece is fixedly connected to the free end of the first flexible engagement fork by cementing or secondary injection molding, and the other end is movably connected to the free end of the second flexible engagement fork; or, one end of the tongue piece is fixedly connected to the free end of the second flexible engagement fork by cementing or secondary injection molding, and the other end is movably connected to the free end of the first flexible engagement fork; or, both ends of the tongue piece are movably connected to the free ends of the first flexible engagement fork and the second flexible engagement fork respectively. This detachable connection structure design enables the tongue piece to be adjusted according to specific needs during use, providing greater flexibility and adapting to different usage scenarios. At the same time, users can easily disassemble and replace the tongue piece, facilitating maintenance or replacement of damaged parts, and improving the repairability and durability of the product. The combination of fixed connection and movable connection ensures that the tongue piece can maintain stability during use without being too rigid to cause inconvenience in operation.

[0015] The present utility model also provides a loose-leaf notebook, which is composed of a cover, a loose-leaf clip, and paper. The loose-leaf clip is used to clamp the bottom cover, the front cover, and several sheets of paper together. The loose-leaf clip adopts the above-mentioned butterfly buckle type clamping ring. The bottom cover 3 is clamped in the card slot 15 formed between the card board 12 and the substrate 11. Several sheets of paper 4 and the front cover 5 are sequentially penetrated by the second flexible engagement fork 14 and stacked on the card board 12. After the several sheets of paper 4 and the front cover 5 are connected at the free ends of the first flexible engagement fork 13 and the second flexible engagement fork 14, they can transition from the second flexible engagement fork 14 to the first flexible engagement fork 13. This design allows users to add or remove paper at any time according to needs, adapting to different usage scenarios and meeting personalized requirements. Through the innovative design of the butterfly buckle type clamping ring, users can easily disassemble and assemble the paper and the cover, reducing the complexity of operation. The combination of the card slot structure and the flexible engagement fork ensures the stability of the paper and the cover during use, avoiding the situation of sliding or falling off.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] 1. This butterfly buckle type clamping ring provides good elasticity and compressive resistance through silicon / rubber to ensure its stability and durability. It can withstand multiple page turns and openings, is not easily damaged or deformed, thereby extending the service life of the loose-leaf notebook; the smooth and soft silicon / rubber does not hurt the hand, can provide a more comfortable writing experience, and can be written on the back of the loose-leaf notebook, making full use of both sides of the loose-leaf notebook, so that users will not feel discomfort when writing and can write more smoothly; the good bendability and durability provided by silicon / rubber allow the loose-leaf notebook to be rolled up and put into a backpack or pocket, which is convenient to carry and can ensure a long service life of the loose-leaf notebook; the degradability of silicon / rubber is environmentally friendly, can reduce the consumption of resources, and reduce the impact on the environment, meeting the concept of sustainable development.

[0018] 2. This butterfly buckle clamping ring combines with the insertion tongue through a flexible engagement fork to provide a stronger binding force. If it is necessary to remove or change the order of the notes, the insertion tongue can be inserted and pulled out to easily complete page turning and re-binding. It can also be reused after writing the notes and the loose-leaf notebook paper can be replaced. In this way, it not only meets the functions of random disassembly, replacement, and combination of the paper, but also can reliably maintain a closed state, has a long service life, and enables the loose-leaf binder to be reused.

[0019] Other advantages, objectives, and features of the present utility model will be described to some extent in the subsequent description, and to some extent, will be obvious to those skilled in the art based on the study of the following text, or can be learned from the practice of the present utility model. The objectives and other advantages of the present utility model can be achieved and obtained through the following description. Brief Description of the Drawings

[0020] In order to make the objectives, technical solutions, and advantages of the present utility model clearer, the present utility model will be described in detail preferably with reference to the accompanying drawings, where:

[0021] Figure 1 is an unfolded three-dimensional schematic diagram of Structure 1 of the butterfly buckle clamping ring of the present utility model;

[0022] Figure 2 is a folded three-dimensional schematic diagram of Structure 2 of the butterfly buckle clamping ring of the present utility model;

[0023] Figure 3 is Figure 1 a three-dimensional schematic diagram of the insertion tongue in another direction in

[0024] Figure 4 is a reference diagram of the effect of clamping the bottom cover of a loose-leaf notebook with the butterfly buckle clamping ring of the present utility model;

[0025] Figure 5 is Figure 4 a reference diagram of the partial effect after continuing to clamp the paper and the front cover of the loose-leaf notebook on the basis of

[0026] Figure 6 is Figure 5 a reference diagram of the back effect of the loose-leaf notebook after clamping is completed;

[0027] Reference Numerals: 1 - main body ring, 11 - base plate, 111 - bending groove, 12 - clamping plate, 13 - first flexible engagement fork, 131 - first joint, 132 - first slot, 14 - second flexible engagement fork, 141 - second joint, 142 - second slot, 15 - clamping slot, 16 - reinforcing strip; 2 - insertion tongue, 21 - first plug, 22 - second plug, 23 - necking; 3 - bottom cover; 4 - paper; 5 - front cover. Detailed implementation manners

[0028] The present utility model will be further described below in conjunction with specific implementation manners. Among them, the attached drawings are only for illustrative purposes, showing only schematic diagrams, rather than physical diagrams, and should not be construed as a limitation of this patent; in order to better illustrate the embodiments of the present utility model, some components in the attached drawings will be omitted, enlarged or reduced, which does not represent the size of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the attached drawings may be omitted.

[0029] As Figures 1-3 shown, a butterfly buckle type clamping ring mentioned in the present utility model includes at least one clamping unit. A single clamping unit is composed of a main body ring 1 and a tongue piece 2 that are inserted into each other. This design of inserting into each other makes the assembly and disassembly of the clamping unit more convenient. Users can easily replace the paper of the loose-leaf notebook without complicated operations. Specifically, the main body ring 1 includes a base plate 11, which provides a stable foundation and can effectively support the paper of the loose-leaf notebook. A clamping plate 12 is provided on the upper surface of the base plate 11, which can enhance the fixing effect between the clamping unit and the loose-leaf notebook (such as the bottom cover), preventing it from sliding or falling off. On one side of the base plate 11 flush with the clamping plate 12, a first flexible engaging fork 13 extending upward is provided. On the top surface of the clamping plate 12, a second flexible engaging fork 14 extending upward is provided. The design of this flexible engaging fork makes the clamping unit have a certain flexibility during use, can adapt to papers of different thicknesses, and enhances the overall adaptability and flexibility; both the first flexible engaging fork 13 and the second flexible engaging fork 14 have their respective opposite bottom ends and top ends. The bottom end of the first flexible engaging fork 13 is fixedly connected to the base plate 11, and the low end of the second flexible engaging fork 14 is fixedly connected to the clamping plate 12. The top ends are free ends, and the free ends of the two are detachably connected through the tongue piece 2. The setting of this free end enables users to operate conveniently when replacing the paper. Just gently disassemble the tongue piece 2, which reduces the operation difficulty of users during use. By adopting the above scheme, the design concept of this butterfly buckle type clamping ring has great market potential, can effectively solve the deficiencies of existing loose-leaf binders, has better flexibility and durability, is convenient for disassembling and assembling the loose-leaf notebook, is small in volume and convenient to carry, and can ensure a longer service life of the loose-leaf notebook.

[0030] In this embodiment, the base plate 11 is provided with a card plate 12 near the first flexible engagement fork 13. This layout can improve the overall strength and stability while maintaining a compact structure. The cross section of the card plate 12 is T-shaped or mushroom-shaped. This unique shape is not only beautiful, but also can provide a better clamping effect. The T-shaped structure or mushroom-shaped shape can increase the contact surface, enhance the contact stability with the loose-leaf base cover, and reduce the risk of the clamping unit sliding or falling off. A card slot 15 that is bilaterally symmetrical and used to clamp the loose-leaf base cover 3 is formed between the card plate 12 and the base plate 11. This design enables the card slot 15 to accommodate the side of the bottom cover, ensuring that the bottom cover can be firmly clamped during use. This symmetry also simplifies the user's operation during clamping, and it can be easily completed no matter which direction it is inserted from. In general, this preferred design further improves the use performance and user experience of the butterfly buckle clamping ring through reasonable structural and shape optimization, and can provide users with a more stable and convenient loose-leaf book use experience.

[0031] In this embodiment, the main body ring 1 and the tongue piece 2 are each an integrally formed structure, so that the clamping unit reduces the complexity of the assembly process, and adopts a soft material, such as PP or PE plastic material, the tongue piece 2 is hard rubber, and the main body ring 1 is soft silicone. The choice of hard rubber can provide good toughness and wear resistance, so that the tongue piece is not easy to deform during multiple plugging and unplugging processes, and maintains its functionality and stability. Soft silicone has good flexibility and comfort, and can provide better adaptability when clamping paper, reduce damage to paper, and improve the user's feel. In this way, the main body ring of soft silicone is combined with the tongue piece of hard rubber, so that the entire clamping ring can maintain a stable clamping effect when in use, and has a certain flexibility, which enhances the overall user experience, helps to improve the functionality of the butterfly buckle clamping ring, and provides a better solution for loose-leaf books.

[0032] In this embodiment, the bottom surface of the substrate 11 is provided with an inclined surface that is thinned in the thickness direction of the substrate 11 and extends outward away from the first flexible engagement fork 13. This design can minimize the increase in the height of the loose-leaf book when it is placed on the substrate by providing a thinning inclined surface on the away surface of the substrate toward the loose-leaf book, so that the notebook tends to be in a horizontal state, effectively improving the writing experience, so that the user can write more stably and comfortably. At the same time, reducing the padding of the substrate on the loose-leaf book can reduce the shaking and shaking during writing, and improve the precision and accuracy of writing.

[0033] In this embodiment, both the first flexible engaging fork 13 and the second flexible engaging fork 14 extend upward in an inwardly curved or bent manner, such that a natural clamping state is formed when they extend upward. This design can better adapt to the object to be clamped (such as paper), enhancing the clamping effect. And the free ends of both are in one of a quasi-circular, square, or D shape after being connected by the tongue piece 2. This diverse design enables users to select different shapes according to personal preferences or usage requirements, increasing the flexibility and customization of the product; the free end of the first flexible engaging fork 13 is provided with a first joint 131, the free end of the second flexible engaging fork 14 is provided with a second joint 141, and the first joint 131 and the second joint 141 are in a convex-concave mating structure, ensuring a tight connection between the tongue piece 2 and the flexible engaging fork. Such a design can provide better positioning during insertion, prevent loosening or separation during use, and also enhance the overall aesthetics of the clamping unit.

[0034] In this embodiment, the free end of the first flexible engaging fork 13 is provided with a first slot 132, and the free end of the second flexible engaging fork 14 is provided with a second slot 142. This design ensures that the tongue piece 2 can be firmly fixed at the free end of the fork during insertion, increasing the stability of the overall structure. The tongue piece 2 has an arc-shaped butterfly buckle structure, which is not only aesthetically pleasing but also provides better flexibility and adaptability in terms of function. Through the necking 23 having a first plug 21 and a second plug 22 opposite to the first plug 21, the tongue piece 2 can better adapt to the slot during connection. Such a design can ensure the tightness of the connection, reducing the risk of loosening during use. The first plug 21 is adapted to the first slot 132, and the second plug 22 is adapted to the second slot 142, ensuring the accuracy of the tongue piece 2 during insertion and removal and enhancing the convenience of operation. The adoption of the above structure provides a more stable and convenient usage method for the loose-leaf notebook, while also enhancing the aesthetics of the product.

[0035] In this embodiment, the outer contour of the first plug 21 is in a polygon structure similar to an ellipse, and at least one surface in its thickness direction is provided with an inclined surface extending outward and thinning; the outer contour of the second plug 22 is in a conical structure similar to a cone, and at least one surface in its thickness direction is provided with an inclined surface extending outward and thinning. This shape design can provide better insertion and adaptability, reduce friction with the slot, and improve the smoothness during insertion. The shape similar to an ellipse helps to self-align during insertion, reducing the operation difficulty; the inclined surface can make the plug more easily embedded into the slot during insertion, reducing resistance and enhancing the smoothness of the operation.

[0036] In this embodiment, two clamping units are arranged side by side to form an integrated bendable structure, which can effectively improve the overall stability and strength. Moreover, the substrates 11 provided on the main body rings 1 of the two clamping units are connected together, ensuring that there will be no unnecessary displacement or loosening during bending, enhancing the overall structural integrity, and a bending groove 111 is provided at the connection, allowing the clamping units to bend and adjust flexibly when needed, which is more convenient. Reinforcing strips 16 are provided on the bending groove 111 to strengthen the strength and durability of this part. That is, as Figure 2 shown, the two clamping units can be folded in half through the bending groove 111, and the two folded clamping units are symmetrically arranged up and down. In this way, since the integrated bendable structure makes the two clamping units of the clamping ring symmetrically arranged up and down, it is more convenient to carry out integral injection molding, and it is convenient to open the production mold, and it can more efficiently ensure the balance and consistency during the molding process. And in the subsequent packaging and transportation processes, since the bending structure makes the shape of the clamping ring more compact, the packaging volume can be reduced, thereby saving packaging materials and transportation space. This can reduce packaging and transportation costs and improve efficiency. That is, this design can bring multiple advantages in the manufacturing, packaging and transportation processes of the clamping ring, and at the same time improve the overall aesthetics and compactness.

[0037] In this embodiment, the structure of the detachable connection is as follows: one end of the tongue piece 2 is fixedly connected to the free end of the first flexible joint fork 13 by cementing or secondary injection molding, and the other end is movably connected to the free end of the second flexible joint fork 14; this design allows one end of the tongue piece 2 to maintain a fixed connection while the other end can be flexibly connected to the second flexible joint fork 14, providing a certain range of movement. Alternatively, one end of the tongue piece 2 is fixedly connected to the free end of the second flexible joint fork 14 by cementing or secondary injection molding, and the other end is movably connected to the free end of the first flexible joint fork 13; this reverse connection also provides flexibility, and users can choose the most suitable connection method according to their needs. Alternatively, both ends of the tongue piece 2 are movably connected to the free ends of the first flexible joint fork 13 and the second flexible joint fork 14 respectively. This design provides greater flexibility, allowing the tongue piece 2 to move freely between the two connection points and also facilitating the replacement of the tongue piece 2.

[0038] Again, as Figures 4-6As shown, the present utility model also provides a loose-leaf notebook, which is composed of a cover, a loose-leaf clip, and paper 4. The cover includes a bottom cover 3 and a front cover 5, which provide protection and aesthetics and ensure the durability of the loose-leaf notebook during use. The loose-leaf clip adopts the above-mentioned butterfly buckle type clamping ring as the core structural part, which is responsible for fixing the paper 4 and the cover together to ensure the overall stability and ease of use. The bottom cover 3 is clamped in the card slot 15 formed between the card board 12 and the substrate 11 to ensure the fixation of the bottom cover and at the same time facilitate the user to easily disassemble and replace it when needed. A number of papers 4 are stacked on the card board 12 in sequence and are flexibly clamped through the flexible engagement forks, that is, a number of papers 4 and the front cover 5 are sequentially penetrated by the second flexible engagement fork 14 and then stacked on the card board 12, and after the free ends of the first flexible engagement fork 13 and the second flexible engagement fork 14 are connected, a number of papers 4 and the front cover 5 can transition from the second flexible engagement fork 14 to the first flexible engagement fork 13. Such a design ensures the stability of the paper and the cover, and at the same time allows the user to make adjustments according to needs, such as changing the order or configuration of the papers.

[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model and not to limit them. Although the present utility model has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present utility model can be modified or equivalently replaced without departing from the spirit and scope of the present technical solution, and they should all be covered within the scope of the claims of the present utility model.

Claims

1. A butterfly buckle type clamping ring, characterized in that: The invention comprises at least one clamping unit, wherein a single clamping unit is composed of a main body ring (1) and an inserting tongue piece (2) which are plugged into each other, wherein the main body ring (1) comprises a base plate (11), wherein a card plate (12) is provided on the upper surface of the base plate (11), wherein a first flexible engaging fork (13) extending upward is provided on a side of the base plate (11) which is flush with the card plate (12), wherein a second flexible engaging fork (14) extending upward is provided on the top surface of the card plate (12), wherein the first flexible engaging fork (13) and the second flexible engaging fork (14) each have a bottom end and a top end which are opposite to each other, wherein the bottom end of the first flexible engaging fork (13) is fixedly connected to the base plate (11), and the lower end of the second flexible engaging fork (14) is fixedly connected to the card plate (12), wherein the top end is a free end, and the free ends of the two are detachably connected via the inserting tongue piece (2).

2. The butterfly buckle type clamping ring according to claim 1, characterized in that: The base plate (11) is provided with the clamping plate (12) near the first flexible engagement fork (13), and the cross section of the clamping plate (12) is T-shaped or mushroom-shaped, and a clamping groove (15) is formed between the clamping plate (12) and the base plate (11) and is symmetrical with respect to each other and is used to clamp the loose-leaf cover (3).

3. The butterfly buckle type clamping ring according to claim 1, characterized in that: The main body ring (1) and the tongue piece (2) are each an integrally formed structure and are made of a soft material; the tongue piece (2) is hard rubber, and the main body ring (1) is soft silicone.

4. The butterfly buckle type clamping ring according to claim 1, characterized in that: The lower bottom surface of the base plate (11) is provided with a sloped surface which is thinned in the thickness direction of the base plate (11) and extends outwardly away from the first flexible engaging fork (13).

5. The butterfly buckle type clamping ring according to claim 1, characterized in that: The first flexible engagement fork (13) and the second flexible engagement fork (14) are both bent inward or folded inward and extend upward, and the free ends of the two are in a shape of a circle, a square or a D after being connected by the plug tongue (2); the free end of the first flexible engagement fork (13) is provided with a first joint (131), and the free end of the second flexible engagement fork (14) is provided with a second joint (141), and the first joint (131) and the second joint (141) are in a convex-concave matching structure.

6. The butterfly buckle type clamping ring according to claim 1, characterized in that: The free end of the first flexible engagement fork (13) is provided with a first slot (132), the free end of the second flexible engagement fork (14) is provided with a second slot (142), the plug tongue piece (2) is an arched butterfly buckle structure, and has a first plug (21) and a second plug (22) opposite to the first plug (21) through a necking (23), the first plug (21) is adapted to the first slot (132), and the second plug (22) is adapted to the second slot (142).

7. The butterfly buckle type clamping ring according to claim 6, characterized in that: The outer contour of the first plug (21) is an elliptical polygonal structure, and at least one surface in the thickness direction is arranged as an outwardly extending thinning inclined surface; the outer contour of the second plug (22) is a conical structure, and at least one surface in the thickness direction is arranged as an outwardly extending thinning inclined surface.

8. The butterfly buckle type clamping ring according to claim 1, characterized in that: The two clamping units are arranged side by side to form an integrated bendable structure, and the base plates (11) provided on the main body rings (1) of the two clamping units are connected together, and a bending groove (111) is provided at the connection point, and a reinforcement strip (16) is provided on the bending groove (111).

9. The butterfly buckle type clamping ring according to claim 1, characterized in that: The detachably connected structure is as follows: one end of the inserting tongue piece (2) is fixedly connected to the free end of the first flexible engagement fork (13) by bonding or secondary injection molding, and the other end is movably connected to the free end of the second flexible engagement fork (14); or, one end of the inserting tongue piece (2) is fixedly connected to the free end of the second flexible engagement fork (14) by bonding or secondary injection molding, and the other end is movably connected to the free end of the first flexible engagement fork (13); or, both ends of the inserting tongue piece (2) are movably connected to the free ends of the first flexible engagement fork (13) and the second flexible engagement fork (14), respectively.

10. A loose-leaf book, comprising a cover, a loose-leaf folder, and paper (4), characterized in that: The binder is used for clamping a bottom cover (3), a front cover (5) and a plurality of the papers (4) together. The binder adopts a butterfly buckle clamping ring as described in any one of claims 1 to 9. The bottom cover (3) is clamped in a clamping groove (15) formed between the clamping plate (12) and the base plate (11). The plurality of the papers (4) and the front cover (5) are sequentially penetrated by the second flexible engagement fork (14) and then stacked on the clamping plate (12). After the free ends of the first flexible engagement fork (13) and the second flexible engagement fork (14) are connected, the plurality of the papers (4) and the front cover (5) can be transferred from the second flexible engagement fork (14) to the first flexible engagement fork (13).

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