Paper pressing mechanism of binding machine and binding machine

Abstract

The paper pressing mechanism comprises a paper pressing table, a screw rod and a lifting nut, the lifting nut is installed on the paper pressing table, the screw rod is connected with the lifting nut in a sleeved mode so as to drive the lifting nut to drive the paper pressing table to ascend and descend, the paper pressing table is provided with an installation groove matched with the lifting nut, and the installation groove is matched with the lifting nut. The lifting nut is embedded in the mounting groove, one end of the lifting nut is provided with a first connecting base matched with the mounting groove, the first connecting base abuts against the mounting groove so that the lifting nut can be limited to the paper pressing table, and a bearing structure matched with the lifting nut is arranged in the mounting groove. The mounting groove abuts against the lifting nut through the bearing structure to offset axial force borne by the lifting nut, the bearing structure is additionally arranged in the mounting groove to eliminate the axial force borne by the lifting nut, the structural strength of the lifting nut is improved, and the service life of the lifting nut is prolonged.

Description

Technical Field

[0001] This application relates to the field of binding machine technology, and more specifically to a paper pressing mechanism and a binding machine. Background Technology

[0002] As an important component of office automation equipment, binding machines primarily function to bind materials such as paper, plastic, and leather together using staples or hot melt adhesive. They are widely used in printing plants, corporate finance offices, and archives management. During the binding process, the paper press, a key component of the binding machine, is mainly used to press the paper firmly to ensure accurate positioning and binding quality. The paper press is usually connected to a lifting mechanism, which raises and lowers the paper press to loosen or tighten the bound materials, preventing relative slippage and improving binding efficiency. For example, utility model patent CN210706559U discloses a paper-pressing platform locking mechanism for a document binding machine. It includes a locking motor assembly that drives the paper-pressing platform to rise and fall, and a screw-nut mechanism that is hygienically connected to the locking motor assembly. The screw-nut mechanism includes a screw and a nut sleeved on the screw, with the screw connecting the paper-pressing platform and the worktable. In this technical solution, the paper-pressing platform is raised and lowered through the locking motor assembly and the screw-nut mechanism. Specifically, the lifting nut is fixed to the paper-pressing platform, and the locking motor and turbine are mounted on the worktable. The locking motor drives the turbine, thereby driving the screw to rotate and raising and lowering the paper-pressing platform. Currently, lifting nuts are often fixed to the paper-pressing platform by adding a connecting plane, increasing the cross-sectional area of ​​the connecting part. However, when the binding machine is working, the lifting nut is raised and lowered through the screw, and the lifting nut needs to withstand the axial force from the screw. The connecting plane will be subjected to a sudden high axial force impact and break directly. Therefore, there is still a need for a paper-pressing mechanism that can effectively eliminate the axial force on the lifting nut. Summary of the Invention

[0003] The technical problem to be solved by this application is to provide a paper pressing mechanism for a binding machine and a binding machine. The paper pressing mechanism uses a mounting groove to embed a lifting nut. By adding a supporting structure in the mounting groove to further abut against the lifting nut, the axial force on the lifting nut is eliminated, the structural strength of the lifting nut is improved, and the service life of the lifting nut is extended.

[0004] This application provides a paper pressing mechanism for a binding machine, including a paper pressing table, a screw, and a lifting nut. The lifting nut is installed on the paper pressing table. The screw is sleeved with the lifting nut to drive the lifting nut to move the paper pressing table up and down. The paper pressing table is provided with a mounting groove adapted to the lifting nut. The lifting nut is embedded in the mounting groove. One end of the lifting nut is provided with a first connecting seat adapted to the mounting groove. The first connecting seat abuts against the mounting groove to limit the lifting nut to the paper pressing table. The mounting groove is provided with a receiving structure adapted to the lifting nut. The mounting groove abuts against the lifting nut through the receiving structure to offset the axial force on the lifting nut.

[0005] In this technical solution, a screw and a lifting nut are connected. During rotation, the screw causes the lifting nut to rise and fall. The lifting nut is installed on a paper pressing table, and it drives the table to rise and fall synchronously. The table's movement loosens or tightens the bound items, preventing relative slippage and improving binding efficiency. An installation groove on the paper pressing table accommodates the lifting nut, and the nut abuts against the groove via a first connecting seat, ensuring its precise positioning. This makes the installation simple, stable, and reliable. A support structure is added within the installation groove to abut the lifting nut. This structure effectively disperses and counteracts the axial force on the nut, improving its structural strength and reducing damage caused by excessive axial force. The support structure also helps absorb and reduce impacts and vibrations during lifting, protecting the nut and enhancing its durability in repeated lifting actions, thus extending its service life.

[0006] As an improvement, the top of the mounting groove is provided with a first recess that mates with the first connecting seat, and the first connecting seat is installed in the first recess. In this technical solution, by setting the first recess for embedding the first connecting seat, a tight fit can be formed between the two, thereby achieving a more stable connection, enhancing the connection stability between the lifting nut and the paper pressing table, and reducing the risk of loosening or falling off due to external forces. The first recess provides a clear positioning space for the first connecting seat, making the position of the lifting nut on the paper pressing table more fixed and preventing it from shifting during operation. By embedding the first connecting seat into the first recess, the axial force borne by the lifting nut can be better distributed, reducing stress concentration at the connection point, thereby improving the overall structural strength.

[0007] As an improvement, the first connecting seat and the first recess are connected by fasteners. In this technical solution, by using fasteners to connect the first connecting seat and the first recess, the fixation between the two components is ensured, making the connection between the first connecting seat and the first recess more reliable. The fasteners include, but are not limited to, bolts, screws, or pins. The pre-tightening force ensures that the connecting parts will not move or loosen during the operation of the binding machine, and also improves the connection rigidity between the first connecting seat and the first recess. The connection is not easy to loosen due to long-term vibration and repeated binding operations, thereby improving the installation stability of the lifting nut.

[0008] As an improvement, this application can provide several specific support structures. One such structure is a step installed in the mounting groove, which abuts against the other end of the lifting nut. In this technical solution, a step adapted to the other end of the lifting nut is provided in the mounting groove. This other end refers to the end of the lifting nut without the first connecting seat. The step is configured as a support structure, and the mounting groove abuts against the other end of the lifting nut through the step. Through the design of abutting against the other end, the step provides stable support for the lifting nut, effectively dispersing and offsetting the axial force on the lifting nut during lifting, reducing the risk of damage caused by instantaneous high axial force.

[0009] As an improvement, this application can provide several specific receiving structures. One such structure is a conical inner wall within the mounting groove, with the lifting nut having a conical outer wall adapted to the receiving structure. The conical outer wall of the lifting nut abuts against the conical inner wall of the mounting groove. In this technical solution, a conical outer wall is provided on the lifting nut, and a conical inner wall is provided within the mounting groove. This conical inner wall is configured as a receiving structure. The abutment between the conical outer wall and the conical inner wall of the mounting groove disperses axial force at multiple points, reducing pressure at a single contact point. This provides better force transmission and dispersion under axial force, ensuring a tight fit between the two, forming a stable structure, and improving the structural strength of the connection between the lifting nut and the mounting groove.

[0010] As an improvement, this application can provide several specific support structures, the third of which is: a second connecting seat is provided at the other end of the lifting nut, and the support structure is a second recessed groove set in the mounting groove, with the second connecting seat installed in the second recessed groove. In this technical solution, a second connecting seat is provided at the other end of the lifting nut, and a second recessed groove is provided in the mounting groove. The second recessed groove is configured as a support structure. The cooperation between the second connecting seat and the second recessed groove enhances the connection stability between the lifting nut and the mounting groove, reduces the risk of loosening due to vibration or impact, and the axial force on the lifting nut can be better dispersed and offset by the fixation of the second connecting seat and the second recessed groove, thereby improving the strength of the entire structure.

[0011] As an improvement, the second connecting seat and the second recess are connected by fasteners. In this technical solution, by using fasteners to connect the second connecting seat and the second recess, the fixation between the two components is ensured, making the connection between the second connecting seat and the second recess more reliable. The fasteners include, but are not limited to, bolts, screws, or pins. The pre-tightening force ensures that the connecting parts will not move or loosen during the operation of the binding machine, and also improves the connection rigidity between the second connecting seat and the second recess. The connection is not easy to loosen due to long-term vibration and repeated binding operations, thereby improving the installation stability of the lifting nut.

[0012] As an improvement, this application can provide several specific receiving structures, the fourth of which is: the receiving structure is a threaded inner wall set in the mounting groove, and the lifting nut is provided with a threaded outer wall adapted to the receiving structure, and the threaded outer wall of the lifting nut and the threaded inner wall of the mounting groove are spirally abutted. In this technical solution, by setting a threaded outer wall on the lifting nut and a threaded inner wall in the mounting groove, the threaded inner wall is configured as a receiving structure, and the threaded outer wall of the lifting nut and the threaded inner wall of the mounting groove abut each other in a spiral manner, ensuring that the two can achieve a spiral tight fit. This design can provide continuous support and locking when the lifting nut is raised and lowered, and the threaded connection provides strong connection rigidity, which can effectively withstand the axial force generated by the lifting nut during the raising and lowering process.

[0013] As an improvement, the screw is provided with an external thread, and the lifting nut is provided with an internal thread adapted to the external thread, wherein the pitch of the internal thread is greater than the pitch of the outer wall of the thread. In this technical solution, the internal thread of the lifting nut is adapted to the external thread of the screw to ensure that the two can mesh correctly and realize the lifting function. Since the pitch of the internal thread of the lifting nut is greater than the pitch of the external thread of the screw, this thread fit can generate greater friction between the lifting nut and the mounting groove, which helps the lifting nut move stably on the screw and prevents the lifting nut from dislodging from the mounting groove when moving on the screw. The design is ingenious and the use is more reliable.

[0014] This application also provides a binding machine, including the paper pressing mechanism of any of the aforementioned binding machines. In this technical solution, a drive device drives a screw to rotate. During rotation, the screw drives a lifting nut to raise and lower the paper pressing table, thereby loosening or tightening the bound materials, preventing relative slippage, and improving binding efficiency. The paper pressing table is fitted with the lifting nut through a mounting groove. By adding a support structure in the mounting groove to further abut against the lifting nut, the axial force on the lifting nut is eliminated. The support structure can more effectively disperse and offset the axial force on the lifting nut, improving the structural strength of the lifting nut and extending its service life. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the paper pressing mechanism of a binding machine according to this application.

[0016] Figure 2 This is an exploded structural diagram of the paper pressing table and lifting nut in this application.

[0017] Figure 3 This is a cross-sectional view of the paper pressing table in Embodiment 2 of this application.

[0018] Figure 4 This is a cross-sectional view of the paper pressing table and lifting nut in Embodiment 2 of this application.

[0019] Figure 5 This is a cross-sectional view of the paper pressing table and lifting nut in Embodiment 3 of this application.

[0020] Figure 6 This is a three-dimensional structural diagram of the lifting nut in Embodiment 3 of this application.

[0021] Figure 7 This is a cross-sectional view of the paper pressing table and lifting nut in Embodiment 4 of this application.

[0022] Figure 8 This is an exploded structural diagram of the paper pressing table and lifting nut in Embodiment 4 of this application.

[0023] Figure 9 This is an exploded cross-sectional view of the paper pressing table and the lifting nut in Embodiment 5 of this application.

[0024] The figure shows: 1. Paper pressing table; 11. Mounting groove; 111. Receiving structure; 12. First sinker; 2. Screw; 21. External thread; 3. Lifting nut; 31. First connecting seat; 32. Conical outer wall; 33. Second connecting seat; 34. Threaded outer wall; 35. Internal thread; 4. Fastener. Detailed Implementation

[0025] 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.

[0026] 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.

[0027] It should also be understood that the terms "comprising," "including," "having," "containing," and "including," 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. The terms "first," "second," etc., are primarily used to distinguish different devices, elements, or components (the specific types and constructions may be the same or different), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, elements, or components. Unless otherwise stated, "a plurality of" means two or more.

[0028] Furthermore, it should be noted that the terms "installation," "setting," "equipped with," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, elements, or components; they can refer to a direct installation on another component or the possible presence of another intermediate component. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the specification of this invention is for the purpose of describing particular embodiments only and is not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0029] Example 1

[0030] like Figures 1 to 9As shown, this application discloses a paper-pressing mechanism for a binding machine, including a paper-pressing table 1, a screw 2, and a lifting nut 3. The lifting nut 3 is installed on the paper-pressing table 1. The screw 2 is sleeved with the lifting nut 3 to drive the lifting nut 3 to move the paper-pressing table 1 up and down. Through the sleeved connection between the screw 2 and the lifting nut 3, the screw 2 can cause the lifting nut 3 to move up and down during rotation. The lifting nut 3 is installed on the paper-pressing table 1, and the lifting nut 3 can drive the paper-pressing table 1 to move up and down synchronously. The paper-pressing table 1 loosens or presses the bound materials by moving up and down, preventing relative slippage of the bound materials and improving binding efficiency. The paper pressing table 1 is provided with an installation groove 11 that is adapted to the lifting nut 3. The lifting nut 3 is embedded in the installation groove 11. One end of the lifting nut 3 is provided with a first connecting seat 31 that is adapted to the installation groove 11. The first connecting seat 31 abuts against the installation groove 11 so that the lifting nut 3 is limited to the paper pressing table 1. By providing an installation groove 11 on the paper pressing table 1 to embed the lifting nut 3, and by having the lifting nut 3 abut against the installation groove 11 through the first connecting seat 31, the positioning and installation of the lifting nut 3 on the paper pressing table 1 is ensured, making the installation of the lifting nut 3 simple, stable and reliable.

[0031] The mounting groove 11 is provided with a receiving structure 111 adapted to the lifting nut 3. The mounting groove 11 abuts against the lifting nut 3 through the receiving structure 111 to offset the axial force on the lifting nut 3. By adding a receiving structure 111 that can abut against the lifting nut 3 in the mounting groove 11, the receiving structure 111 can more effectively disperse and offset the axial force on the lifting nut 3, thereby improving the structural strength of the lifting nut 3 and reducing damage caused by excessive axial force. The design of the receiving structure 111 helps to absorb and reduce the impact and vibration of the lifting nut 3 during the lifting process, thereby protecting the lifting nut 3 and enhancing the durability of the lifting nut 3 in repeated lifting actions, thus extending the service life of the lifting nut 3.

[0032] More specifically, such as Figure 1 and Figure 2 As shown, the top of the mounting groove 11 is provided with a first recess 12 that is adapted to the first connecting seat 31. The first connecting seat 31 is installed in the first recess 12. By setting the first recess 12 for embedding the first connecting seat 31, a tight fit can be formed between the two, thereby achieving a more stable connection, enhancing the connection stability between the lifting nut 3 and the paper pressing table 1, and reducing the risk of loosening or falling off due to external forces. The first recess 12 provides a clear positioning space for the first connecting seat 31, making the position of the lifting nut 3 on the paper pressing table 1 more fixed and preventing it from shifting during operation. By embedding the first connecting seat 31 into the first recess 12, the axial force borne by the lifting nut 3 can be better dispersed, reducing stress concentration at the connection and thus improving the strength of the overall structure.

[0033] More specifically, such as Figure 1 and Figure 2 As shown, the first connecting seat 31 and the first recess 12 are connected by fasteners 4. By using fasteners 4 to connect the first connecting seat 31 and the first recess 12, the fixation between the two components is ensured, making the connection between the first connecting seat 31 and the first recess 12 more reliable. Fasteners 4 include, but are not limited to, bolts, screws, or pins. The pre-tightening force ensures that the connecting parts will not move relative to each other or loosen during the operation of the binding machine. It also improves the rigidity of the connection between the first connecting seat 31 and the first recess 12, and the connection is not easy to loosen due to long-term vibration and repeated binding operations, thereby improving the installation stability of the lifting nut 3.

[0034] Example 2

[0035] like Figure 3 and Figure 4 As shown, this embodiment provides a paper pressing mechanism for a binding machine based on Embodiment 1. Its structure is the same as that of Embodiment 1. The receiving structure 111 is a step set in the mounting groove 11. The step abuts against the other end of the lifting nut 3. The other end refers to the end of the lifting nut 3 without the first connecting seat 31. The step is configured as the receiving structure 111. The mounting groove 11 abuts against the other end of the lifting nut 3 through the step. Through the design of abutting against the other end, the step provides a stable support force for the lifting nut 3, which can effectively disperse and offset the axial force on the lifting nut 3 during the lifting process, and reduce the risk of damage caused by instantaneous high axial force.

[0036] Example 3

[0037] like Figure 5 and Figure 6 As shown, this embodiment provides a paper pressing mechanism for a binding machine based on Embodiment 1. Its structure is the same as that of Embodiment 1. The receiving structure 111 is a conical inner wall set in the mounting groove 11. The lifting nut 3 is provided with a conical outer wall 32 adapted to the receiving structure 111. The conical outer wall 32 of the lifting nut 3 abuts against the conical inner wall of the mounting groove 11. The conical outer wall 32 is provided on the lifting nut 3, and the conical inner wall is provided in the mounting groove 11. The conical inner wall is configured as the receiving structure 111. The conical outer wall 32 of the lifting nut 3 abuts against the conical inner wall of the mounting groove 11. The abutment of the conical inner and outer walls can disperse the axial force at multiple points, reduce the pressure at a single contact point, and provide better force transmission and dispersion effect under the action of axial force, ensuring that the two can fit tightly together to form a stable structure and improve the structural strength of the connection between the lifting nut 3 and the mounting groove 11.

[0038] Example 4

[0039] like Figure 7 and Figure 8 As shown, this embodiment provides a paper pressing mechanism for a binding machine based on Embodiment 1. Its structure is the same as that of Embodiment 1. In this embodiment, a second connecting seat 33 is provided at the other end of the lifting nut 3. The receiving structure 111 is a second recessed groove provided in the mounting groove 11. The second connecting seat 33 is installed in the second recessed groove. The second connecting seat 33 is provided at the other end of the lifting nut 3, and a second recessed groove is provided in the mounting groove 11. The second recessed groove is configured as a receiving structure 111. The cooperation between the second connecting seat 33 and the second recessed groove enhances the connection stability between the lifting nut 3 and the mounting groove 11, reduces the risk of loosening caused by vibration or impact, and the axial force on the lifting nut 3 can be better dispersed and offset by fixing the second connecting seat 33 and the second recessed groove, thereby improving the strength of the entire structure.

[0040] More specifically, such as Figure 7 and Figure 8 As shown, the second connecting seat 33 and the second recess are connected by fasteners 4. By using fasteners 4 to connect the second connecting seat 33 and the second recess, the fixation between the two components is ensured, making the connection between the second connecting seat 33 and the second recess more reliable. Fasteners 4 include, but are not limited to, bolts, screws, or pins. The pre-tightening force ensures that the connecting parts will not move or loosen during the operation of the binding machine, and also improves the connection rigidity between the second connecting seat 33 and the second recess. The connection is not easy to loosen due to long-term vibration and repeated binding operations, thereby improving the installation stability of the lifting nut 3.

[0041] Example 5

[0042] like Figure 9 As shown, this embodiment provides a paper pressing mechanism for a binding machine based on Embodiment 1, with the same structure as Embodiment 1. The receiving structure 111 is a threaded inner wall disposed within the mounting groove 11. The lifting nut 3 is provided with a threaded outer wall 34 adapted to the receiving structure 111. The threaded outer wall 34 of the lifting nut 3 spirally abuts against the threaded inner wall of the mounting groove 11. By providing a threaded outer wall 34 on the lifting nut 3 and a threaded inner wall within the mounting groove 11, this threaded inner wall is configured as the receiving structure 111. The threaded outer wall 34 of the lifting nut 3 and the threaded inner wall of the mounting groove 11 abut against each other in a spiral manner, ensuring a tight spiral fit between the two. This design provides continuous support and locking during the lifting of the lifting nut 3. The threaded connection provides strong connection rigidity, effectively withstanding the axial force generated by the lifting nut 3 during lifting.

[0043] More specifically, such as Figure 9As shown, the screw 2 is provided with an external thread 21, and the lifting nut 3 is provided with an internal thread 35 that matches the external thread 21. The pitch of the internal thread 35 is greater than the pitch of the thread outer wall 34. The internal thread 35 of the lifting nut 3 is matched with the external thread 21 of the screw 2 to ensure that the two can mesh correctly and realize the lifting function. Since the pitch of the internal thread 35 of the lifting nut 3 is greater than the pitch of the external thread 21 of the screw 2, this thread fit can generate greater friction between the lifting nut 3 and the mounting groove 11, which helps the lifting nut 3 to move stably on the screw 2 and prevents the lifting nut 3 from dislodging from the mounting groove 11 when moving on the screw 2. The design is ingenious and the use is more reliable.

[0044] Example 6

[0045] like Figures 1 to 9 As shown, this embodiment provides a paper pressing mechanism for a binding machine based on embodiments one to five. Its structure is the same as the referenced embodiments. The paper pressing mechanism drives the screw 2 to rotate through a driving device. During the rotation, the screw 2 can drive the lifting nut 3 to lift the paper pressing table 1, thereby loosening or tightening the bound items, preventing relative slippage of the bound items, and improving binding efficiency. The paper pressing table 1 is fitted with the lifting nut 3 through the mounting groove 11. By adding a supporting structure 111 in the mounting groove 11 to further abut against the lifting nut 3, the axial force on the lifting nut 3 is eliminated. The supporting structure 111 can more effectively disperse and offset the axial force on the lifting nut 3, improve the structural strength of the lifting nut 3, and extend the service life of the lifting nut 3.

[0046] This application is not limited to the above-described preferred embodiments. Anyone can derive other products in various forms under the guidance of this application. However, regardless of any changes made to their shape or structure, any technical solution that is the same as or similar to that of this application falls within the protection scope of this application.

Claims

1. A paper pressing mechanism for a binding machine, comprising a paper pressing table (1), a screw (2), and a lifting nut (3), wherein the lifting nut (3) is mounted on the paper pressing table (1), and the screw (2) is sleeved with the lifting nut (3) to drive the lifting nut (3) to move the paper pressing table (1) up and down, characterized in that, The paper pressing table (1) is provided with an installation groove (11) adapted to the lifting nut (3). The lifting nut (3) is embedded in the installation groove (11). One end of the lifting nut (3) is provided with a first connecting seat (31) adapted to the installation groove (11). The first connecting seat (31) abuts against the installation groove (11) to limit the lifting nut (3) to be located on the paper pressing table (1). The installation groove (11) is provided with a receiving structure (111) adapted to the lifting nut (3). The installation groove (11) abuts against the lifting nut (3) through the receiving structure (111) to offset the axial force on the lifting nut (3).

2. The paper pressing mechanism of a binding machine according to claim 1, characterized in that, The top of the mounting groove (11) is provided with a first recess (12) that is adapted to the first connecting seat (31), and the first connecting seat (31) is installed in the first recess (12).

3. The paper pressing mechanism of a binding machine according to claim 2, characterized in that, The first connecting seat (31) and the first sink (12) are connected by fasteners (4).

4. The paper pressing mechanism of a binding machine according to claim 1 or 2, characterized in that, The receiving structure (111) is a step set in the mounting groove (11), which abuts against the other end of the lifting nut (3).

5. The paper pressing mechanism of a binding machine according to claim 1 or 2, characterized in that, The receiving structure (111) is a conical inner wall set in the mounting groove (11), and the lifting nut (3) is provided with a conical outer wall (32) adapted to the receiving structure (111). The conical outer wall (32) of the lifting nut (3) abuts against the conical inner wall of the mounting groove (11).

6. The paper pressing mechanism of a binding machine according to claim 1 or 2, characterized in that, The other end of the lifting nut (3) is provided with a second connecting seat (33), the receiving structure (111) is a second sink groove provided in the mounting groove (11), and the second connecting seat (33) is installed in the second sink groove.

7. The paper pressing mechanism of a binding machine according to claim 6, characterized in that, The second connecting seat (33) is connected to the second sink by fasteners (4).

8. The paper pressing mechanism of a binding machine according to claim 1 or 2, characterized in that, The receiving structure (111) is a threaded inner wall set in the mounting groove (11), and the lifting nut (3) is provided with a threaded outer wall (34) adapted to the receiving structure (111). The threaded outer wall (34) of the lifting nut (3) is spirally abutted against the threaded inner wall of the mounting groove (11).

9. The paper pressing mechanism of a binding machine according to claim 8, characterized in that, The screw (2) is provided with an external thread (21), and the lifting nut (3) is provided with an internal thread (35) that is compatible with the external thread (21). The pitch of the internal thread (35) is greater than the pitch of the outer wall of the thread (34).

10. A binding machine, characterized in that, Includes the paper pressing mechanism of a binding machine as described in any one of claims 1-9.

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