Improved feeding mechanism of button sewing machine

Abstract

The utility model discloses an improved button sewing machine feeding mechanism which comprises a feeding rod, a clamping rod and a driving structure, the feeding rod and the clamping rod are in elastic sliding connection through a spring structure, a clamping groove is formed between the clamping rod and the feeding rod through a clamping part, and the driving structure is installed at the rear end of the feeding rod. The feeding mechanism comprises a driving rod which is movably arranged on a feeding rod in a penetrating mode and used for driving a clamping part to move, in the feeding process, the clamping part and the feeding rod firmly clamp a button in a clamping groove under the acting force of a spring structure, then the feeding rod drives the button to move to a discharging position, the driving rod moves to stretch out of the front end of the feeding rod to eject the clamping part open, and the button is clamped through the clamping part. According to the button feeding device, the clamping grooves are opened, so that the buttons naturally fall off from the opened clamping grooves, the situation that the buttons shake and incline in the feeding process is avoided, clamping and feeding of the buttons of different sizes are met through the design, the application range is wider, the feeding precision and reliability are improved, and the working efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of button sewing machines, in particular to an improved feeding mechanism of a button sewing machine. Background Art

[0002] In the production process of clothing, since multiple buttons need to be assembled on the clothes, a button sewing machine is usually used for automatic button sewing. The existing button sewing machine includes a button feeding mechanism for conveying the buttons to the corresponding processing mold to realize the automatic button feeding process. The existing Chinese patent document CN219568238U discloses a button feeding mechanism of an automatic button sewing machine, including a push rod, a material stop hook, a first limiting part and a second limiting part. The material stop hook can be relatively slidably arranged at the feeding end of the push rod, one end of the material stop hook is connected to the front end of the push rod to form a clamping part, the first limiting part is arranged as a baffle, one end of the baffle is abutted against the end of the material stop hook, so that the clamping part formed by the material stop hook and the end of the push rod remains open, and the second limiting part is arranged as an adjusting piece with a bent sheet metal body, the adjusting piece includes an adjusting connection part and a limiting bent edge part, the adjusting piece is limited by abutting against the material stop hook by the limiting bent edge part, and the opening size of the clamping part is adjusted, so that the button is limited in the clamping groove formed by the clamping part, and can fall naturally when pushed to the mold. It can be seen that the button has a certain degree of freedom in the clamping part and is not firmly clamped, so the button can fall freely from the clamping part. In practice, due to the different types and shapes of buttons, especially some small buttons with high precision requirements, its size is smaller than the minimum spacing of the clamping part. Although the small button can be pushed to move by the clamping part, it is easy to cause the button to shake and tilt, and there is an error in the falling position, which results in the small button not being able to fall accurately into the receiving port of the mold below, affecting the feeding accuracy and reliability. Utility Model Content

[0003] Therefore, the purpose of the utility model is to overcome the problem that the button feeding mechanism in the prior art can push the button to move through the clamping part, but it is easy to cause the button to shake and tilt, and there is an error in the falling position, which affects the accuracy and reliability of feeding.

[0004] In order to solve the above technical problems, the utility model provides an improved feeding mechanism of a button sewing machine, comprising:

[0005] A feeding rod is reciprocatingly arranged on the feeding bottom plate;

[0006] A clamping rod is slidably connected to the feeding rod, the clamping rod is provided with a clamping portion opposite to the front end of the feeding rod, a clamping groove for clamping the button is formed between the clamping portion and the feeding rod, a spring structure is provided between the feeding rod and the clamping rod, and the clamping portion and the feeding rod close the clamping groove under the elastic force applied by the spring structure to clamp the button;

[0007] The driving structure is installed at the rear end of the feeding rod, and includes a driving rod that moves and penetrates the feeding rod, and the clamping part is located on the moving path of the driving rod; when the feeding rod drives the clamping groove to reach the blanking position, the driving rod extends out of the front end of the feeding rod under the drive of the driving structure to push open the clamping part, thereby opening the clamping groove to allow the button to fall freely.

[0008] As a preferred solution, the moving direction of the driving rod is consistent with the moving direction of the feeding rod, and the feeding rod includes a through hole structure extending along its moving direction, the through hole structure penetrates to the front and rear ends of the feeding rod, and the driving rod is inserted into the through hole structure.

[0009] As a preferred solution, a transmission bracket is installed at the rear end of the feeding rod, and the transmission bracket is provided with a mounting block that fixes and presses the rear end of the feeding rod. The driving structure is a first cylinder fixed to the transmission bracket, and the driving rod is a cylinder push rod arranged on the first cylinder, and one end of the first cylinder is opposite to the rear end of the feeding rod; it also includes a second cylinder that drives the feeding rod to move back and forth, and the cylinder push rod of the second cylinder is connected to the transmission bracket.

[0010] As a preferred solution, the driving rod includes a push rod body driven by the first cylinder, and an extension rod portion detachably connected to the push rod body, and the extension rod portion passes through a through hole structure and cooperates with the clamping portion.

[0011] As a preferred solution, the driving structure is provided with a stroke adjustment structure for adjusting the moving distance of the driving rod.

[0012] As a preferred embodiment, a guide cavity is provided through the first cylinder for the driving rod to move back and forth, and the stroke adjustment structure includes: an adjusting rod which is linked to the driving rod and is arranged in the guide cavity, and an adjusting knob is arranged on the end of the adjusting rod extending out of the guide cavity, and the adjusting knob is threadedly connected to the adjusting rod and is arranged opposite to the other end of the first cylinder.

[0013] As a preferred embodiment, the front end of the feeding rod is provided with a first end face and a second end face which are distributed in a stepped manner, and the clamping portion is provided with a first mating surface and a second mating surface which are respectively opposite to the first end face and the second end face on the side facing the feeding rod, and the clamping groove is composed of two arc grooves which are relatively arranged on the first end face and the first mating surface.

[0014] As a preferred solution, one end of the through hole structure passes through the second end surface, and the driving rod extends out of the through hole structure and pushes against the second matching surface.

[0015] As a preferred embodiment, the clamping rod includes a main rod portion slidably connected to the side of the feeding rod, the main rod portion is connected to the clamping portion to form an L-shaped structure, the main rod portion includes a guide hole extending along its length direction, at least one guide member connected to the feeding rod is passed through the guide hole, and when the clamping rod and the feeding rod slide relative to each other, the guide member is driven to move in the guide hole.

[0016] As a preferred solution, a first positioning piece passing through the guide hole is fixedly provided on the side wall of the feeding rod, and a second positioning piece opposite to the first positioning piece is provided on the clamping rod. The two ends of the spring structure are respectively connected to the first positioning piece and the second positioning piece. The spring structure applies an elastic force to the clamping rod to drive the clamping part to move closer to the front end of the feeding rod.

[0017] Compared with the prior art, the technical solution of the utility model has the following advantages:

[0018] 1. In the improved feeding mechanism of the button sewing machine provided by the utility model, after the button is put into the clamping groove, during the feeding process, the clamping part and the feeding rod firmly clamp the button in the clamping groove under the action of the spring structure, and then the feeding rod drives the button to move to the blanking position, and a buckle mold is provided below the clamping groove according to the blanking position. At this time, the button is firmly clamped by the clamping groove and cannot fall naturally. Therefore, the front end of the feeding rod is extended by the driving rod to push the clamping part open, so that the clamping part overcomes the action of the spring and moves to the side away from the feeding rod and opens the clamping Groove, so that the buttons can fall naturally from the opened clamping groove. The feeding device of the button sewing machine designed in this way adopts a combination of closing and clamping to transfer the buttons, and then opening the clamping groove to drop the materials to complete the feeding process, thereby avoiding the shaking and tilting of the buttons during the feeding process, thereby ensuring that the buttons can accurately fall into the receiving port of the mold below, improving the accuracy and reliability of feeding, and having good feeding stability. It can realize clamping and feeding for buttons of different sizes, has a wider range of applications, can be well applied to button sewing machine equipment, and improves work efficiency.

[0019] 2. In the improved feeding mechanism of the button sewing machine provided by the utility model, a through-hole structure penetrating the front and rear ends of the feeding rod is provided, so that the driving rod passes through the through-hole structure just corresponding to the position of the clamping part, ensuring that the driving rod pushes the clamping part to move under the drive of the first cylinder, that is, to push the relative position between the clamping rod and the feeding rod to move, thereby achieving the purpose of opening the clamping groove; and when the driving rod is reset, the clamping part and the feeding rod are realigned together under the action of the spring force, thereby achieving the purpose of closing the clamping groove. This structural setting uses the through-hole structure to guide the movement of the driving rod, and can well combine the driving rod and the feeding rod for use, with a compact structure, which improves the accuracy and stability of the coordination between the driving rod and the clamping part.

[0020] 3. In the improved feeding mechanism of the button sewing machine provided by the utility model, the driving rod includes a push rod body driven by the first cylinder, and an extension rod portion detachably connected to the push rod body. The push rod body and the extension rod portion are preferably fixedly connected by a threaded connection. Since the setting distance of the driving rod is relatively long, the driving rod is detachably connected in a split manner. This design allows the extension rod portion of the corresponding length to be selected according to different connection distances, so that after the length of the driving rod is lengthened, the trigger distance requirement between the driving rod and the clamping portion can be met. The utility model has good practicality, is relatively easy to install, and is also convenient for replacement and maintenance.

[0021] 4. In the improved button sewing machine feeding mechanism provided by the utility model, the first cylinder with adjustable movement stroke is provided according to the driving structure. The first cylinder includes an adjusting rod linked to the driving rod, and an adjusting knob movably provided on the adjusting rod. With this structural arrangement, the adjusting knob is moved on the adjusting rod by a threaded connection. The distance between the adjusting knob and the first cylinder is changed to adjust the movement stroke of the driving rod. Since the driving rod is used to push the clamping part to move to open the clamping groove, the adjustment of the travel distance of the driving rod is directly related to the opening distance between the clamping part and the feeding rod. The adjustment operation is convenient to meet the feeding requirements of buttons of different sizes. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 It is a three-dimensional structural schematic diagram of the feeding mechanism of the improved button sewing machine of the utility model;

[0024] Figure 2 It is a schematic diagram of the planar structure of the feeding mechanism of the improved button sewing machine of the utility model;

[0025] Figure 3 for Figure 2 A cross-sectional top view along AA is shown;

[0026] Figure 4 It is a partial enlarged structural schematic diagram of the feeding mechanism of the improved button sewing machine of the utility model;

[0027] Explanation of the accompanying drawings: 1. Feeding rod; 11. Through hole structure; 12. First end face; 13. Second end face; 2. Clamping rod; 21. Clamping part; 22. Main rod part; 23. First mating surface; 24. Second mating surface; 25. Guide hole; 26. Guide member; 3. Spring structure; 31. First positioning member; 32. Second positioning member; 4. Clamping groove; 5. Driving structure; 6. Driving rod; 7. Adjusting rod; 8. Adjusting knob; 9. Transmission bracket; 91. Installing block. DETAILED DESCRIPTION

[0028] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] In the description of the present invention, it should be noted that the terms "first", "second" and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0030] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0032] Example 1

[0033] The present embodiment is described in detail below with reference to the accompanying drawings:

[0034] This embodiment provides Figure 1-4The improved feeding mechanism of the button sewing machine shown in the figure comprises a feeding rod 1, a clamping rod 2 and a driving structure 5, wherein the feeding rod 1 is reciprocatingly arranged on the feeding bottom plate; the clamping rod 2 is slidably connected to the feeding rod 1, the clamping rod 2 is provided with a clamping portion 21 opposite to the front end of the feeding rod 1, a clamping groove 4 for clamping buttons is formed between the clamping portion 21 and the feeding rod 1, a spring structure 3 is provided between the feeding rod 1 and the clamping rod 2, the clamping portion 21 and the feeding rod 1 close the clamping groove 4 under the elastic force applied by the spring structure 3 to clamp the button, and the driving structure 5 is installed in the The rear end of the feeding rod 1 includes a driving rod 6 that is movable and penetrates the feeding rod 1, and the clamping portion 21 is located on the moving path of the driving rod 6; the feeding rod 1 will reach the loading position and the blanking position respectively during the reciprocating movement, and the feeding rod 1 drives the clamping groove to move to the loading position for realizing the loading of buttons, and drives the clamping groove to move to the blanking position for realizing the blanking of buttons. Specifically, when the feeding rod 1 drives the clamping groove 4 to reach the blanking position, the driving rod 6 extends out of the front end of the feeding rod 1 under the drive of the driving structure 5 to push open the clamping portion 21, thereby opening the clamping groove 4 to allow the buttons to fall freely.

[0035] The above implementation is the core technical solution of this embodiment. After the button is put into the clamping groove 4, during the feeding process, the clamping part 21 and the feeding rod 1 firmly clamp the button in the clamping groove under the action of the spring structure 3, and then the feeding rod 1 drives the button to move to the blanking position. According to the blanking position, it is located outside the feeding bottom plate and is provided with a lower button mold located below the clamping groove 4. At this time, the button is firmly clamped by the clamping groove 4 and cannot fall naturally. Therefore, the front end of the feeding rod 1 is extended by the driving rod 6 to push the clamping part 21 open, so that the clamping part 21 overcomes the action of the spring and moves to the side away from the feeding rod 1 and opens the clamping. Slot 4, so that the buttons can fall naturally from the opened clamping slot 4. The feeding device of the button sewing machine designed in this way adopts a combination of closing and clamping to transfer the buttons, and then opening the clamping slot 4 to drop the materials to complete the feeding process. This can meet the feeding requirements of small buttons with high precision requirements, avoid the shaking and tilting of the buttons during the feeding process, thereby ensuring that the buttons can accurately fall into the receiving port of the mold below, thereby improving the accuracy and reliability of feeding, having good feeding stability, and being able to realize clamping and feeding for buttons of different sizes. It has a wider range of applications and can be better applied to button sewing machine equipment to improve work efficiency.

[0036] Combine the following Figure 1-3 The specific setting method of the driving structure is described in detail:

[0037] The moving direction of the driving rod 6 is consistent with the moving direction of the feeding rod 1. The feeding rod 1 includes a through-hole structure 11 extending along its moving direction. The through-hole structure 11 penetrates the front and rear ends of the feeding rod 1. The driving rod 6 is penetrated in the through-hole structure 11. A transmission bracket 9 is installed at the rear end of the feeding rod 1. Specifically, a mounting block 91 is provided on the transmission bracket 9 to fix and press the rear end of the feeding rod 1. The mounting block 91 is fixed to the transmission bracket 9 by bolts. The driving structure 5 is a first cylinder fixed to the transmission bracket 9. The driving rod 6 is a cylinder push rod arranged in the first cylinder. One end of the first cylinder is connected to the feeding rod 1. The rear ends are relative, so that the driving rod 6 passes through the through-hole structure 11 and corresponds to the position of the clamping part 21, ensuring that the driving rod 6 pushes the clamping part 21 to move under the drive of the first cylinder, that is, to push the relative position movement between the clamping rod 2 and the feeding rod 1, thereby achieving the purpose of opening the clamping groove 4; and when the driving rod is reset, the clamping part 21 and the feeding rod 1 are realigned together under the action of the spring force, thereby achieving the purpose of closing the clamping groove. This structural setting guides the movement of the driving rod 6 through the through-hole structure 11, and can well combine the driving rod 6 and the feeding rod 1 for use, with a compact structure, which improves the accuracy and stability of the coordination between the driving rod and the clamping part.

[0038] It is further preferred that the feeding device of the button sewing machine further includes a second cylinder (not shown in the drawings) for driving the feeding rod 1 to reciprocate, and the second cylinder is connected to the transmission bracket 9 through its push rod, thereby driving the feeding rod 1 to reciprocate linearly. Since the first cylinder is installed at the rear end of the feeding rod 1 and is far away from the clamping part 21, it is necessary to make the length of the driving rod 6 longer, and the length of the cylinder push rod is generally not long enough, so the driving rod 6 is lengthened by a detachable connection. Specifically, the driving rod 6 includes a push rod body driven by the first cylinder, and an extension rod portion detachably connected to the push rod body. The push rod body and the extension rod portion are preferably fixedly connected by a threaded connection. The extension rod portion passes through the through-hole structure 11 and cooperates with the clamping part 21. In this design, the extension rod portion of the corresponding length can be selected according to different connection distances, so that after the length of the driving rod 6 is lengthened, the trigger distance requirement between the driving rod 6 and the clamping part 21 can be met, which has good practicality, is relatively convenient to install, and is also convenient for replacement and maintenance.

[0039] like Figure 4As shown, the front end of the feeding rod 1 is provided with a first end face 12 and a second end face 13 which are distributed in a stepped manner, and the clamping portion 21 is provided with a first mating surface 23 and a second mating surface 24 which are respectively opposite to the first end face 12 and the second end face 13 on the side facing the feeding rod 1, and the clamping groove 4 is composed of two arc grooves which are relatively arranged on the first end face 12 and the first mating surface 23, wherein one end of the through hole structure 11 passes through the second end face 13, and the driving rod 6 is pushed against the second mating surface 24 after extending out of the through hole structure 11, so that the clamping portion 21 moves away from one end of the feeding rod 1 under the push of the driving rod 6, thereby achieving the purpose of opening the clamping groove 4, and such a reasonable design ensures that the staggered positions of the clamping grooves of the driving rod 6 will not interfere with each other.

[0040] In this embodiment, the feeding rod 1 will drive the clamping slot 4 to move back to the loading position after completing the feeding, and then put the next button into the clamping slot 4 for feeding, and repeat this reciprocating operation. At this time, the clamping slot needs to be opened again at the loading position to wait for discharge. For this reason, the feeding device of this button sewing machine can adopt the following discharge methods: the first method is that the driving structure 5 of the first cylinder is started again when the feeding rod moves to the loading position, and the clamping part 21 is pushed open by the driving rod 6, thereby opening the clamping slot 4 to complete the button loading process, and then the driving rod 6 is reset, and the clamping part 21 and the feeding rod 1 clamp the button and move it to the blanking position under the action of the spring; the second method is to adopt the existing driving method of limiting the clamping rod, that is, to set a limit block on the moving path of the clamping rod, and the limit block is arranged opposite to the rear end of the clamping rod 2. When the feeding rod 1 moves to the upward feeding position, it drives the rear end of the clamping rod 2 to abut against the limit block. Since the clamping rod 2 and the feeding rod 1 are elastically slidably connected, the clamping rod 2 will move relative to the feeding rod 1 when it is blocked, thereby opening the clamping groove 4 to complete the loading process of the button.

[0041] like Figure 1-3As shown, the driving structure is provided with a stroke adjustment structure for adjusting the moving stroke of the driving rod 6, and a guide cavity for the driving rod 6 to reciprocate is penetrated on the first cylinder, and the guide cavity penetrates to both ends of the first cylinder. As a specific structural setting, the stroke adjustment structure includes: an adjustment rod 7 arranged in the guide cavity in linkage with the driving rod 6, and an adjustment knob 8 is arranged on one end of the adjustment rod 7 extending out of the guide cavity, and the adjustment knob 8 is threadedly connected to the adjustment rod 7 and arranged opposite to the other end of the first cylinder. The first cylinder of this structural design is a moving cylinder. The stroke-adjustable cylinder structure has the advantage that the adjusting knob 8 can be moved on the adjusting rod 7 by means of a thread, and the distance between the adjusting knob 8 and the first cylinder can be changed to adjust the movement stroke of the driving rod 6. The driving rod 6 is used to push the clamping part 21 to move to open the clamping slot 4. Therefore, the adjustment of the stroke distance of the driving rod 6 is directly related to the opening distance between the clamping part 21 and the feeding rod 1, that is, to adjust the spacing size when the clamping slot is opened, which can adapt to the requirements of releasing buttons of different sizes, and the adjustment operation is convenient to meet the feeding requirements of buttons of different sizes.

[0042] As a preferred embodiment, combined with Figure 2-4 As shown, a first positioning member 31 passing through the guide hole 25 is fixedly provided on the side wall of the feeding rod 1, and a second positioning member 32 opposite to the first positioning member 31 is provided on the clamping rod 2. The two ends of the spring structure 3 are respectively connected to the first positioning member 31 and the second positioning member 32. The spring structure 3 applies an elastic force to the clamping rod 2 to drive the clamping part 21 to move closer to the front end of the feeding rod 1. This arrangement realizes the elastic connection between the clamping rod 2 and the feeding rod 1. It is further preferred that the clamping rod 2 includes a main rod portion 22 slidably connected to the side of the feeding rod 1, the main rod portion 22 is connected to the clamping portion 21 to form an L-shaped structure, the main rod portion 22 includes a guide hole 25 extending along its length direction, at least one guide member 26 connected to the feeding rod 1 is penetrated through the guide hole 25, when the clamping rod 2 and the feeding rod 1 slide relative to each other, the guide member 26 is driven to move in the guide hole 25, the guide member 26 is a fixing screw, and the moving direction of the clamping rod 2 is limited by the cooperation of the guide member 26 and the guide hole 25, so that the clamping rod 2 and the feeding rod 1 move in the same direction to prevent the clamping rod 2 from being displaced during the movement, and the installation is stable and reliable.

[0043] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention of the utility model.

Claims

1. An improved feeding mechanism for a button sewing machine, characterized in that: include A feeding rod (1) is reciprocatingly arranged on the feeding bottom plate; A clamping rod (2) is slidably connected to the feeding rod (1), the clamping rod (2) is provided with a clamping portion (21) opposite to the front end of the feeding rod (1), a clamping groove (4) for clamping a button is formed between the clamping portion (21) and the feeding rod (1), a spring structure (3) is provided between the feeding rod (1) and the clamping rod (2), and the clamping portion (21) and the feeding rod (1) close the clamping groove (4) under the action of the elastic force applied by the spring structure (3) to clamp the button; The driving structure (5) is installed at the rear end of the feeding rod, and comprises a driving rod (6) which is movably arranged through the feeding rod (1), and the clamping portion (21) is located on the moving path of the driving rod (6); when the feeding rod (1) drives the clamping groove (4) to reach the blanking position, the driving rod (6) extends out of the front end of the feeding rod (1) under the drive of the driving structure (5) to push open the clamping portion (21), thereby opening the clamping groove and allowing the button to fall freely.

2. The improved feeding mechanism of the button sewing machine according to claim 1, characterized in that: The moving direction of the driving rod (6) is consistent with the moving direction of the feeding rod (1); the feeding rod (1) comprises a through hole structure (11) extending along its moving direction; the through hole structure (11) penetrates the front and rear ends of the feeding rod (1); and the driving rod (6) is inserted into the through hole structure (11).

3. The improved feeding mechanism of the button sewing machine according to claim 1 or 2, characterized in that: A transmission bracket (9) is installed at the rear end of the feeding rod (1), and the transmission bracket (9) is provided with a mounting pressure block (91) fixedly pressing against the rear end of the feeding rod (1). The driving structure (5) is a first cylinder fixed to the transmission bracket (9), and the driving rod (6) is a cylinder push rod arranged in the first cylinder, and one end of the first cylinder is opposite to the rear end of the feeding rod (1).

4. The improved feeding mechanism of the button sewing machine according to claim 3 is characterized in that: The driving rod (6) comprises a push rod body driven by a driving structure, and an extension rod portion detachably connected to the push rod body, wherein the extension rod portion passes through a through hole structure (11) and cooperates with the clamping portion (21).

5. The improved feeding mechanism of the button sewing machine according to claim 3 is characterized in that: The driving structure is provided with a stroke adjustment structure for adjusting the moving distance of the driving rod (6).

6. The improved feeding mechanism of the button sewing machine according to claim 5, characterized in that: The first cylinder is provided with a guide cavity through which a driving rod (6) can move back and forth. The stroke adjustment structure comprises: an adjustment rod (7) arranged in the guide cavity in linkage with the driving rod (6), and an adjustment knob (8) arranged at one end of the adjustment rod (7) extending out of the guide cavity. The adjustment knob (8) is threadedly connected to the adjustment rod (7) and arranged opposite to the other end of the first cylinder.

7. The improved feeding mechanism of the button sewing machine according to claim 2, characterized in that: The front end of the feeding rod (1) is provided with a first end face (12) and a second end face (13) which are distributed in a stepped manner, and the clamping portion (21) is provided with a first mating face (23) and a second mating face (24) which are respectively opposite to the first end face (12) and the second end face (13) on one side facing the feeding rod (1), and the clamping groove is composed of two arc grooves which are arranged on the first end face (12) and the first mating face (23) in a relative manner.

8. The improved feeding mechanism of the button sewing machine according to claim 7, characterized in that: One end of the through hole structure (11) passes through the second end surface (13), and the driving rod (6) extends out of the through hole structure (11) and pushes against the second matching surface (24).

9. The improved feeding mechanism of the button sewing machine according to claim 7 or 8, characterized in that: The clamping rod (2) comprises a main rod portion (22) slidably connected to the side of the feeding rod (1); the main rod portion (22) is connected to the clamping portion (21) to form an L-shaped structure; the main rod portion (22) comprises a guide hole (25) extending along its length direction; at least one guide member (26) connected to the feeding rod (1) is passed through the guide hole (25); when the clamping rod (2) and the feeding rod (1) slide relative to each other, the guide member (26) is driven to move in the guide hole (25).

10. The improved feeding mechanism of the button sewing machine according to claim 9, characterized in that: A first positioning member (31) passing through the guide hole (25) is fixedly arranged on the side wall of the feeding rod (1), and a second positioning member (32) opposite to the first positioning member (31) is arranged on the clamping rod (2). The two ends of the spring structure (3) are respectively connected to the first positioning member (31) and the second positioning member (32). The spring structure (3) applies an elastic force to the clamping rod (2) to drive the clamping portion (21) to move closer to the front end of the feeding rod (1).

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