Lower rivet head structure of binding machine

Abstract

The lower rivet head structure of the binding machine comprises a lower rivet head, a rotating supporting seat, a rotating mechanism and a lifting mechanism, a first guiding matching part enters a first guiding groove through a first opening to form circumferential positioning matching and vertical guiding matching, a circumferential positioning side wall conducts circumferential positioning on the first guiding matching part, and after circumferential positioning, the lower rivet head is driven by the rotating supporting seat to rotate. When the rotary supporting seat drives the first guide matching part to vertically ascend and descend, the two side walls limit circumferential rotation of the first guide matching part so as to form circumferential positioning matching, and meanwhile the two side walls guide the first guide matching part to vertically ascend and descend so as to form vertical guide matching. And the first detection part and the first position detection sensor are matched to form a first position detection signal, so that the precision of the lower riveting head structure is guaranteed, and the running and riveting stability of the lower riveting head is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of binding machines, in particular to a lower rivet head structure of a binding machine. Background Art

[0002] The main function of a binding machine is to punch holes in the documents that need to be bound, and then use riveted tubes to achieve binding. Since it is used more frequently by financial personnel, for example, financial documents need to be bound, the binding machine can also be called a financial binding machine. However, it is not limited to use by financial personnel, and can also be used in other scenarios where binding is required.

[0003] As can be seen from the above, binding machines use riveted tubes to achieve binding. Therefore, binding machines are usually equipped with a lower rivet head structure, which is equipped with a lower rivet head. This lower rivet head plays the role of supporting and shaping the lower end of the riveted tube. Therefore, how to ensure the operation of the lower rivet head and the stability of riveting during repeated use is of great significance. Although corresponding technical means can be used to improve accuracy, such as installing sensors, due to the existence of paper scraps and waste tubes in the working environment that affect the operation of sensors, how to improve accuracy remains to be studied. Utility Model Content

[0004] The technical problem to be solved by the utility model is to overcome the defects of the prior art and propose a lower rivet head structure of a binding machine, which is conducive to ensuring the accuracy of the lower rivet head structure, thereby ensuring the operation of the lower rivet head and the stability of riveting.

[0005] Compared with the existing technology, the utility model proposes a lower rivet head structure of a binding machine, including a lower rivet head, a rotating support seat, a rotating mechanism and a lifting mechanism. The rotating mechanism is connected to the rotating support seat, and the rotating mechanism is used to drive the rotating support seat to rotate. The lifting mechanism is connected to the rotating support seat, and the lifting mechanism is used to drive the rotating support seat to move vertically up and down.

[0006] The lower rivet head is arranged on a rotating support seat, and the rotating support seat rotates to drive the lower rivet head to switch between a first position and a second position arranged circumferentially along the working hole of the binding machine. The first position is set as the working position of the lower rivet head, and the second position is set as the avoidance position of the lower rivet head. It also includes a first guide portion, which is provided with a vertically arranged first guide groove, and a first opening is provided on the side of the first guide groove. The rotating support seat is provided with a first guide matching portion, and the first guide matching portion rotates synchronously when the lower rivet head rotates, and when the lower rivet head rotates to the first position, the first guide matching portion enters the first guide groove through the first opening to form a circumferential positioning match and a vertical guiding match.

[0007] The first guide groove includes two side walls that are relatively parallel and vertically arranged. A first opening is set on one of the two side walls, and the other side wall of the two side walls serves as a circumferential positioning side wall of the first guide matching part. When the first guide matching part rotates into place synchronously with the lower rivet head, the circumferential positioning side wall circumferentially positions the first guide matching part. After circumferential positioning, when the rotating support seat drives the first guide matching part to move vertically up and down, the two side walls limit the circumferential rotation of the first guide matching part to form a circumferential positioning fit, and at the same time guide the first guide matching part to move vertically up and down to form a vertical guide fit.

[0008] It also includes a first position detection sensor, and the rotating support seat is also provided with a first detection part. The first detection part rotates synchronously when the lower rivet head rotates, and when the lower rivet head rotates to the first position, the first detection part cooperates with the first position detection sensor to form a first position detection signal.

[0009] In some embodiments, the first guide portion is provided with a first position detection sensor on one side of the other side wall, and the first position detection sensor is provided opposite the first opening, and the rotating support seat is provided with a first detection portion on one side of the first guide matching portion.

[0010] In some embodiments, the first detection part is configured as a plug-in fitting part, and the first position detection sensor is provided with a plug-in fitting groove. The first detection part rotates synchronously when the lower rivet head rotates, and when the lower rivet head rotates to the first position, the first detection part plugs in and fits with the first position detection sensor to form a first position detection signal.

[0011] In some embodiments, a guard portion is provided on the upper side of the plug-fitting slot, and the guard portion is used to prevent things from falling into the plug-fitting slot.

[0012] In some embodiments, the top of the protective portion is configured as an inclined surface.

[0013] In some embodiments, a base is further included, a first guide portion is provided on the base, a collection trough is provided on an attachment of the base located on the first guide portion, and a slope is provided toward the collection trough, and the slope is also used to guide things to the collection trough.

[0014] In some embodiments, a vertical adjustment structure is provided between the first guide portion and the first position detection sensor.

[0015] In some embodiments, the vertical adjustment structure includes a plurality of adjustment holes arranged in sequence along the vertical direction, and the vertical position of the first position detection sensor relative to the first guide portion is adjusted by being fixed in different adjustment holes.

[0016] In some embodiments, the rotating mechanism includes a support rod, a rotating support arm and a first driving structure. The rotating support arm and the rotating support seat are rotatably connected to the support rod in sequence from bottom to top vertically, and the rotating support arm is also connected to the rotating support seat. The first driving structure is used to drive the rotating support arm to rotate around the support rod, and the rotation of the support arm is used to drive the rotating support seat to rotate around the support rod.

[0017] In some embodiments, the lifting mechanism includes a screw, and the rotating support seat is provided with a transmission nut connected to the screw helically. The lower end of the screw is rotatably connected to the rotating support arm. The rotating support arm is also connected to the rotating support seat, which means that the rotating support arm is indirectly connected to the rotating support seat through the screw, and the screw and the support rod are arranged vertically parallel to each other. The rotating support seat is equipped with a second drive structure, which is connected to the transmission nut. The second drive structure is used to drive the transmission nut to rotate, and the rotation of the transmission nut is used to drive the rotating support seat to rise and fall vertically relative to the screw and the support rod.

[0018] In some embodiments, the second drive structure includes an electric motor, a worm gear, a first gear and a second gear. The electric motor is provided with a worm portion of a worm gear, the first gear is provided with a worm wheel portion of a worm gear, the first gear is connected to a transmission nut, and the first gear is also meshed with the second gear, and the second gear is connected to a drilling head. The drilling head is provided on a rotating support seat. When the electric motor rotates, it will simultaneously drive the transmission nut and the second gear to rotate so that the drilling head can be raised and lowered while rotating.

[0019] In some embodiments, the drilling head and the lower rivet head provided on the rotating support seat are arranged in sequence along the circumference of the working hole. When the lower rivet head rotates to the second position, the drilling head is located directly below the working hole.

[0020] In some embodiments, a second guide portion is also included, which is provided with a second guide groove arranged vertically, a second opening is provided on the side of the second guide groove, and the rotating support seat is provided with a second guide matching portion. The second guide matching portion rotates synchronously when the rotating support seat rotates, and when the lower rivet head reaches the second position, the second guide matching portion enters the second guide groove through the second opening to form a circumferential positioning fit and a vertical guiding fit.

[0021] The second guide groove includes two relatively parallel and vertically arranged side walls, a second opening is provided on one of the two side walls, and the other side wall of the two side walls serves as a circumferential positioning side wall of the second guide fitting part. When the rivet head is lowered to the second position, the circumferential positioning side wall circumferentially positions the second guide fitting part. After circumferential positioning, when the rotating support seat drives the second guide fitting part to move vertically up and down, the two side walls limit the circumferential rotation of the second guide fitting part to form a circumferential positioning fit, and at the same time guide the second guide fitting part to move vertically up and down to form a vertical guide fit.

[0022] It also includes a second position detection sensor, and the rotating support seat is also provided with a second detection part. The second detection part rotates synchronously when the rotating support seat rotates, and when the drilling head reaches the second position, the second detection part cooperates with the second position detection sensor to form a second position detection signal.

[0023] In some embodiments, the second guide fitting portion is configured as a second rolling portion.

[0024] In some embodiments, the first guide fitting portion is configured as a first rolling portion.

[0025] After adopting the above structure, compared with the prior art, the utility model has the following advantages: in the technical solution disclosed in the present invention, when in the first position, the first guide matching part enters the first guide groove through the first opening to form circumferential positioning matching and vertical guiding matching. Specifically, the first guide groove is provided with two relatively parallel and vertically arranged side walls, and a first opening is provided on one of the side walls of the two side walls. The other side wall of the two side walls serves as the circumferential positioning side wall of the first guide matching part. When the first guide matching part rotates into place synchronously when the lower rivet head rotates, the circumferential positioning side wall circumferentially positions the first guide matching part. After circumferential positioning, when the rotating support seat drives the first guide matching part to move vertically up and down, the two side walls limit the circumferential rotation of the first guide matching part. The first guide fitting part is guided to move vertically up and down to form a vertical guide fit. Therefore, when the lower rivet head is working, the circumferential deviation of the rotating support seat is well suppressed due to the action of the rotating support seat on the first guide fitting part. Therefore, the circumferential deviation of the lower rivet head is well suppressed. During repeated use, the vertical direction has higher precision. At the same time, with the help of the first position detection signal formed by the first position detection sensor, the rotating support seat has higher rotational position accuracy. Combined with the circumferential positioning of the first guide fitting part by the circumferential positioning side wall, the first guide fitting part can be more accurately fitted into the first guide groove, so that the entire lower rivet head structure can obtain higher reliability during repeated use.

[0026] The first position detection signal can be used to control the rotating mechanism to stop rotating in time when it is in the first position, so as to avoid damage to the mechanism caused by continuous rotation and wear of the first guide matching portion and the circumferential positioning side wall. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a three-dimensional schematic diagram of the lower rivet head structure of a binding machine from an oblique angle on the left side.

[0028] Figure 2 This is a three-dimensional schematic diagram of the lower rivet head structure of a binding machine from the front side perspective.

[0029] Figure 3The figure is a three-dimensional schematic diagram of the lower rivet head structure of a binding machine with the workbench removed and viewed from an oblique angle on the left side.

[0030] Figure 4 The present invention is a three-dimensional schematic diagram of the lower rivet head structure of a binding machine after removing the workbench and viewed from an oblique rear side.

[0031] Figure 5 It is a three-dimensional schematic diagram mainly showing a second driving structure.

[0032] Figure 6 It is a three-dimensional schematic diagram mainly showing a plug-in combination to form a first position detection signal.

[0033] Figure 7 A is an enlarged schematic diagram.

[0034] Figure 8 It is a three-dimensional schematic diagram of the first guide portion from a front perspective.

[0035] Figure 9 It is a three-dimensional schematic diagram of the first guide portion from a rear perspective.

[0036] Figure 10 It is a three-dimensional schematic diagram of the first guide portion after the first position detection sensor is removed and from a rear side perspective.

[0037] Figure 11 It is a stereoscopic schematic diagram of the first guide portion after the first position detection sensor is removed and from a front perspective.

[0038] Explanation of the accompanying drawings: 1-workbench, 2-working hole, 3-base, 4-collecting groove, 5-lower rivet head, 6-rotating support seat, 7-first guide part, 8-first guide groove, 9-first opening, 10-first guide matching part, 11-entry side wall, 12-positioning side wall, 13-first position detection sensor, 14-first detection part, 15-plug-in matching part, 16-plug-in matching groove, 17-protective part, 18-inclined surface, 19-adjusting hole, 20-support rod, 21-rotating support arm, 22-first driving structure, 23-screw, 24-drive nut, 25-electric motor, 26-first gear, 27-second gear, 28-worm part, 29-worm wheel part, 30-drilling head, 31-second guide part, 32-second guide groove, 33-second opening, 34-second guide matching part, 35-second position detection sensor, 36-second detection part. DETAILED DESCRIPTION

[0039] The following description is intended to disclose the present invention and enable those skilled in the art to implement the present invention. The embodiments described below are provided for illustrative purposes only, and those skilled in the art will readily appreciate other obvious variations. The basic principles of the present invention as defined in the following description may be applied to other embodiments, variations, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the present invention.

[0040] Those skilled in the art should understand that, in the disclosure of the present invention, the terms "longitudinal", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicating the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the above terms cannot be understood as limiting the present invention.

[0041] like Figures 1 to 11 As shown, a lower rivet head structure of a binding machine is disclosed, which includes a workbench 1 and a base 3, and other structures of the lower rivet head structure are arranged between the workbench 1 and the base 3.

[0042] The lower rivet head structure also includes a lower rivet head 5, a rotating support seat 6, a rotating mechanism and a lifting mechanism. The rotating mechanism is connected to the rotating support seat 6, and the rotating mechanism is used to drive the rotating support seat 6 to rotate. The lifting mechanism is connected to the rotating support seat 6, and the lifting mechanism is used to drive the rotating support seat 6 to move vertically up and down.

[0043] The lower rivet head 5 is arranged on a rotating support seat 6, and the rotating support seat 6 rotates to drive the lower rivet head 5 to switch between a first position and a second position arranged circumferentially along the working hole 2 of the binding machine. The first position is set as the working position of the lower rivet head 5, and the second position is set as the avoidance position of the lower rivet head 5. It also includes a first guide portion 7, and the first guide portion 7 is provided with a vertically arranged first guide groove 8. The side of the first guide groove 8 is provided with a first opening 9. The rotating support seat 6 is provided with a first guide matching portion 10. The first guide matching portion 10 rotates synchronously when the lower rivet head 5 rotates, and when the lower rivet head 5 rotates to the first position, the first guide matching portion 10 enters the first guide groove 8 through the first opening 9 to form a circumferential positioning fit and a vertical guiding fit.

[0044] The first guide groove 8 is provided with two relatively parallel and vertically arranged side walls, one of which is provided with a first opening 9, and the other side wall of the two side walls serves as a circumferential positioning side wall of the first guide fitting portion 10. When the first guide fitting portion 10 is synchronously rotated into position when the lower rivet head 5 rotates, the circumferential positioning side wall circumferentially positions the first guide fitting portion 10. After circumferential positioning, when the rotating support seat 6 drives the first guide fitting portion 10 to move vertically up and down, the two side walls restrict the circumferential rotation of the first guide fitting portion 10 to form a circumferential positioning fit, and at the same time guide the first guide fitting portion 10 to move vertically up and down to form a vertical guide fit. One of the two side walls can be recorded as the entry side wall 11, and the other side wall can be recorded as the positioning side wall 12.

[0045] It also includes a first position detection sensor 13, and the rotating support seat 6 is also provided with a first detection part 14. The first detection part 14 rotates synchronously when the lower rivet head 5 rotates, and when the lower rivet head 5 rotates to the first position, the first detection part 14 cooperates with the first position detection sensor 13 to form a first position detection signal.

[0046] In some embodiments, as Figure 1 、 3 As shown, at this time, the drilling head 30 and the lower rivet head 5 of the binding machine arranged on the rotating support seat 6 are arranged in sequence along the circumference of the working hole 2. When the lower rivet head 5 rotates to the second position, the drilling head 30 is located directly below the working hole 2, that is, the second position is also set as the working position of the drilling head 30.

[0047] like Figure 1 The figure shows the second position, in which the drilling head 30 is directly below the working hole 2, while the lower rivet head 5 is in a retracted position. In this example, the drilling head 30 and the lower rivet head 5 are arranged at a substantially right angle to each other. In other words, the rotating support 6 rotates back and forth at a right angle to switch between the first and second positions.

[0048] In some embodiments, as Figure 1 、 3 4, it also includes a second guide portion 31, the second guide portion 31 is provided with a second guide groove 32 arranged vertically, and a second opening 33 is provided on the side of the second guide groove 32, and the rotating support seat 6 is provided with a second guide matching portion 34. The second guide matching portion 34 rotates synchronously when the rotating support seat 6 rotates, and when the lower rivet head 5 reaches the second position, the second guide matching portion 34 enters the second guide groove 32 through the second opening 33 to form a circumferential positioning fit and a vertical guiding fit.

[0049] The second guide groove 32 is provided with two relatively parallel and vertically arranged side walls, and a second opening 33 is provided on one of the two side walls. The other side wall of the two side walls serves as a circumferential positioning side wall of the second guide fitting part 34. When the lower rivet head 5 reaches the second position, the circumferential positioning side wall circumferentially positions the second guide fitting part 34. After circumferential positioning, when the rotating support seat 6 drives the second guide fitting part 34 to move vertically up and down, the two side walls limit the circumferential rotation of the second guide fitting part 34 to form a circumferential positioning fit, and at the same time guide the second guide fitting part 34 to move vertically up and down to form a vertical guide fit.

[0050] It also includes a second position detection sensor 35, and the rotating support seat 6 is also provided with a second detection part 36. The second detection part 36 rotates synchronously when the rotating support seat 6 rotates, and when the drilling head 30 reaches the second position, the second detection part 36 cooperates with the second position detection sensor 35 to form a second position detection signal.

[0051] In some embodiments, as Figure 1 、 3 As shown in Figures 4 and 5, the first guide portion 7, the second guide portion 31 and the related circumferential positioning matching structure and the vertical guide matching structure are the same, and the first position detection sensor 13, the second position detection sensor 35 and the related matching detection structure are also the same.

[0052] The first position detection sensor 13 and the second position detection sensor 35 are, for example, photoelectric sensors, but can of course also be other position detection sensors. All kinds of position detection sensors applicable to the present disclosure can be applied to the present disclosure.

[0053] For better guidance, the first guide matching portion 10 is configured as a first rolling portion, and the second guide matching portion 34 is configured as a second rolling portion. Both the first rolling portion and the second rolling portion may be bearings.

[0054] In some embodiments, as Figure 2 、 4 As shown, the first guide portion 7 is provided with a first position detection sensor 13 on one side of the other side wall, and the first position detection sensor 13 is provided opposite to the first opening 9, and the rotation support seat 6 is provided with a first detection portion 14 on one side of the first guide matching portion 10. In this way, the structure is compact.

[0055] In some embodiments, as Figure 6 、 7As shown, the first detection portion 14 is configured as a plug-in mating portion 15, and the first position detection sensor 13 is provided with a plug-in mating slot 16. The first detection portion 14 rotates synchronously with the lower rivet head 5. When the lower rivet head 5 rotates to the first position, the first detection portion 14 plugs and mates with the first position detection sensor 13 to generate a first position detection signal. In this way, detection is reliable.

[0056] Further, such as Figure 7 、 8 As shown, a protective portion 17 is provided on the upper side of the plug-in fitting groove 16 to prevent objects from falling into the plug-in fitting groove 16. Objects such as paper scraps and waste pipes, paper scraps refer to paper scraps generated by the drilling bit during drilling, and waste pipes refer to discarded riveted pipes. In this way, the above technical solution can further improve reliability.

[0057] Further, such as Figure 8 、 11 As shown, the top of the protection portion 17 is set as an inclined surface 18. In this way, it is not easy to pile up, and the above technical solution can further improve reliability.

[0058] In some embodiments, as Figure 2 、 6 As shown, a first guide portion 7 is provided on the base (3), a collection tank 4 is provided on the base (3) adjacent to the first guide portion 7, and an inclined surface 18 is provided facing the collection tank 4. The inclined surface 18 is also used to guide things to the collection tank 4. In this way, the above technical solution can improve the cleanliness and reduce the cleaning burden of the user.

[0059] In some embodiments, as Figure 9 、 10 As shown, a vertical adjustment structure is provided between the first guide portion 7 and the first position detection sensor 13. In this way, adjustment can be performed as needed.

[0060] Furthermore, the vertical adjustment structure includes a plurality of adjustment holes 19 arranged in sequence along the vertical direction, and the vertical position of the first position detection sensor 13 relative to the first guide portion 7 can be adjusted by fixing it in different adjustment holes 19. In this way, the structure is simple and the adjustment is convenient.

[0061] In some embodiments, as Figure 3 、 4 As shown in Figure 5, the rotating mechanism includes a support rod 20, a rotating support arm 21 and a first driving structure 22. The rotating support arm 21 and the rotating support seat 6 are rotatably connected to the support rod 20 in sequence from bottom to top vertically, and the rotating support arm 21 is also connected to the rotating support seat 6. The first driving structure 22 is used to drive the rotating support arm 21 to rotate around the support rod 20, and the rotation of the support arm is used to drive the rotating support seat 6 to rotate around the support rod 20.

[0062] Of course, the rotating mechanism may also be other mechanisms, and any rotating mechanism applicable to the present disclosure may be applied to the present disclosure.

[0063] In this example, the first drive structure 22 adopts an electrically driven gear transmission structure. Specifically, the rotating support arm 21 is provided with a passive large gear and an active small gear is provided on the electrically driven side. The rotation of the small gear drives the large gear, and the rotation of the large gear drives the rotating support arm 21. This structure is simple and reliable.

[0064] In some embodiments, as Figure 3 、 4 As shown in Figures 5 and 6, the lifting mechanism includes a screw rod 23, a drive nut 24 helically connected to the screw rod 23, and a lower end of the screw rod 23 rotatably connected to the rotating support arm 21. The fact that the rotating support arm 21 is also connected to the rotating support base 6 means that the rotating support arm 21 is indirectly connected to the rotating support base 6 via the screw rod 23. The screw rod 23 and the support rod 20 are vertically arranged parallel to each other. The rotating support base 6 is equipped with a second drive structure connected to the drive nut 24. The second drive structure is used to drive the drive nut 24 to rotate. The rotation of the drive nut 24 is used to drive the rotating support base 6 to rise and fall vertically relative to the screw rod 23 and the support rod 20. This results in a compact structure and a small size.

[0065] Of course, the lifting mechanism may also be other mechanisms, and any lifting mechanism applicable to the present disclosure may be applied to the present disclosure.

[0066] Further, such as Figure 5 As shown, the second driving structure includes an electric motor 25, a worm gear, a first gear 26 and a second gear 27. The electric motor 25 is provided with a worm portion 28 of a worm gear, and the first gear 26 is provided with a worm wheel portion 29 of a worm gear. The first gear 26 is connected to the transmission nut 24, and the first gear 26 is also meshed with the second gear 27, and the second gear 27 is connected to the drilling head 30 of the binding machine. The drilling head 30 is set on the rotating support seat 6. When the electric motor 25 rotates, it will simultaneously drive the transmission nut 24 and the second gear 27 to rotate, so that the drilling head 30 rotates and rises and falls at the same time.

[0067] In order to further simplify the structure and reduce the volume, the first gear 26 is integrally provided with the transmission nut 24 . Specifically, an internal thread is formed on the inner side of the first gear 26 , and the internal thread is threadedly connected to the screw rod 23 .

[0068] When understanding the present disclosure, if necessary, the above structure can refer to other embodiments / appendices. Figure 1 And understand, no further elaboration here.

[0069] The above description is merely an illustrative embodiment of the present invention, and therefore any equivalent changes or modifications made according to the structure, features and principles described in the scope of protection of the present invention are included in the scope of protection of the present invention.

Claims

1. A lower rivet head structure of a binding machine, comprising a lower rivet head (5), characterized in that: It also includes a rotating support base (6), a rotating mechanism and a lifting mechanism, wherein the rotating mechanism is connected to the rotating support base (6) and is used to drive the rotating support base (6) to rotate, and the lifting mechanism is connected to the rotating support base (6) and is used to drive the rotating support base (6) to move vertically up and down; The lower rivet head (5) is arranged on a rotating support seat (6), and the rotating support seat (6) rotates to drive the lower rivet head (5) to switch between a first position and a second position arranged along the circumference of the working hole (2) of the binding machine, the first position being set as the working position of the lower rivet head (5), and the second position being set as the avoidance position of the lower rivet head (5). The lower rivet head (5) also includes a first guide portion (7), the first guide portion (7) being provided with a first guide groove (8) arranged vertically, and a first opening (9) being provided on the side of the first guide groove (8). The rotating support seat (6) is provided with a first guide matching portion (10), and the first guide matching portion (10) is synchronously rotated when the lower rivet head (5) rotates, and when the lower rivet head (5) rotates to the first position, the first guide matching portion (10) enters the first guide groove (8) through the first opening (9) to form a circumferential positioning match and a vertical guiding match. The first guide groove (8) includes two relatively parallel and vertically arranged side walls, one of which is provided with a first opening (9), and the other side wall of the two side walls serves as a circumferential positioning side wall of the first guide fitting part (10). When the first guide fitting part (10) is synchronously rotated into position when the lower rivet head (5) rotates, the circumferential positioning side wall circumferentially positions the first guide fitting part (10). After circumferential positioning, when the rotating support seat (6) drives the first guide fitting part (10) to move vertically up and down, the two side walls restrict the circumferential rotation of the first guide fitting part (10) to form a circumferential positioning fit, and at the same time guide the first guide fitting part (10) to move vertically up and down to form a vertical guide fit. The invention also includes a first position detection sensor (13). The rotating support seat (6) is also provided with a first detection portion (14). The first detection portion (14) rotates synchronously with the lower rivet head (5) when the lower rivet head (5) rotates. When the lower rivet head (5) rotates to the first position, the first detection portion (14) cooperates with the first position detection sensor (13) to form a first position detection signal.

2. The lower rivet head structure of the binding machine according to claim 1, characterized in that: The first guide portion (7) is provided with a first position detection sensor (13) on one side of the other side wall, and the first position detection sensor (13) is provided opposite to the first opening (9). The rotating support seat (6) is provided with a first detection portion (14) on one side of the first guide matching portion (10).

3. The lower rivet head structure of the binding machine according to claim 1 or 2, characterized in that: The first detection portion (14) is configured as a plug-in fitting portion (15), and the first position detection sensor (13) is provided with a plug-in fitting groove (16). The first detection portion (14) rotates synchronously with the lower rivet head (5) when the lower rivet head (5) rotates, and when the lower rivet head (5) rotates to a first position, the first detection portion (14) plugs in and fits with the first position detection sensor (13) to generate a first position detection signal.

4. The lower rivet head structure of the binding machine according to claim 3, characterized in that: A protection portion (17) is provided on the upper side of the plug-in fitting groove (16), and the protection portion (17) is used to prevent things from falling into the plug-in fitting groove (16).

5. The lower rivet head structure of the binding machine according to claim 4, characterized in that: The top of the protection part (17) is arranged as an inclined surface (18).

6. The lower rivet head structure of the binding machine according to claim 5, characterized in that: The invention also includes a base (3), a first guide portion (7) is provided on the base (3), a collection trough (4) is provided at an attachment of the base (3) located at the first guide portion (7), and a slope (18) is provided toward the collection trough (4), and the slope (18) is also used to guide things toward the collection trough (4).

7. The lower rivet head structure of the binding machine according to claim 2, characterized in that: A vertical adjustment structure is provided between the first guide portion (7) and the first position detection sensor (13).

8. The lower rivet head structure of the binding machine according to claim 7, characterized in that: The vertical adjustment structure comprises a plurality of adjustment holes (19) arranged in sequence along the vertical direction, and the vertical position of the first position detection sensor (13) relative to the first guide portion (7) is adjusted by being fixed in different adjustment holes (19).

9. The lower rivet head structure of the binding machine according to claim 1, characterized in that: The rotating mechanism comprises a support rod (20), a rotating support arm (21) and a first driving structure (22). The rotating support arm (21) and the rotating support seat (6) are rotatably connected to the support rod (20) in sequence from bottom to top vertically, and the rotating support arm (21) is also connected to the rotating support seat (6). The first driving structure (22) is used to drive the rotating support arm (21) to rotate around the support rod (20). The rotation of the support arm is used to drive the rotating support seat (6) to rotate around the support rod (20).

10. The lower rivet head structure of the binding machine according to claim 9, characterized in that: The lifting mechanism includes a screw rod (23), a rotating support seat (6) is provided with a transmission nut (24) connected to the screw rod (23) in a spiral transmission manner, the lower end of the screw rod (23) is rotatably connected to the rotating support arm (21), and the rotating support arm (21) is also connected to the rotating support seat (6), which means that the rotating support arm (21) is indirectly connected to the rotating support seat (6) through the screw rod (23), the screw rod (23) and the support rod (20) are arranged parallel to each other in the vertical direction, and the rotating support seat (6) is equipped with a second driving structure, which is connected to the transmission nut (24). The second driving structure is used to drive the transmission nut (24) to rotate, and the rotation of the transmission nut (24) is used to drive the rotating support seat (6) to vertically lift relative to the screw rod (23) and the support rod (20).

11. The lower rivet head structure of the binding machine according to claim 10, characterized in that: The second driving structure comprises an electric motor (25), a worm gear, a first gear (26) and a second gear (27). The electric motor (25) is provided with a worm portion (28) of the worm gear, the first gear (26) is provided with a worm portion (29) of the worm gear, the first gear (26) is connected to a transmission nut (24), the first gear (26) is also meshed with a second gear (27), and the second gear (27) is connected to a drilling head (30) of the binding machine. The drilling head (30) is arranged on a rotating support seat (6). When the electric motor (25) rotates, it will simultaneously drive the transmission nut (24) and the second gear (27) to rotate, so that the drilling head (30) rotates and is also lifted and lowered.

12. The lower rivet head structure of the binding machine according to claim 1, 2 or 11, characterized in that: The drilling head (30) and the lower rivet head (5) arranged on the rotating support seat (6) are sequentially arranged along the circumference of the working hole (2); when the lower rivet head (5) rotates to the second position, the drilling head (30) is located directly below the working hole (2).

13. The lower rivet head structure of the binding machine according to claim 12, characterized in that: The second guide portion (31) is provided with a second guide groove (32) arranged vertically, and a second opening (33) is provided on the side of the second guide groove (32). The rotating support seat (6) is provided with a second guide matching portion (34). The second guide matching portion (34) rotates synchronously with the rotating support seat (6). When the drilling head (30) reaches the second position, the second guide matching portion (34) enters the second guide groove (32) through the second opening (33) to form a circumferential positioning match and a vertical guiding match. The second guide groove (32) includes two relatively parallel and vertically arranged side walls, one of which is provided with a second opening (33), and the other side wall of the two side walls serves as a circumferential positioning side wall of the second guide fitting portion (34). When the lower rivet head (5) is at the second position, the circumferential positioning side wall circumferentially positions the second guide fitting portion (34). After the circumferential positioning, when the rotating support seat (6) drives the second guide fitting portion (34) to move vertically up and down, the two side walls restrict the circumferential rotation of the second guide fitting portion (34) to form a circumferential positioning fit, and at the same time guide the second guide fitting portion (34) to move vertically up and down to form a vertical guide fit. The invention also includes a second position detection sensor (35), and the rotating support seat (6) is also provided with a second detection part (36). The second detection part (36) rotates synchronously with the rotating support seat (6), and when the lower rivet head (5) reaches the second position, the second detection part (36) cooperates with the second position detection sensor (35) to form a second position detection signal.

14. The lower rivet head structure of the binding machine according to claim 13, characterized in that: The second guide matching portion (34) is configured as a second rolling portion.

15. The lower rivet head structure of the binding machine according to claim 1 or 2, characterized in that: The first guide matching portion (10) is configured as a first rolling portion.

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