A rope embroidery presser foot mechanism

Abstract

This utility model relates to a rope embroidery presser foot mechanism, belonging to the technical field of rope embroidery machines. It includes a presser foot mechanism with a needle reciprocating drive shaft at its upper end and a presser foot reciprocating drive rod on its side. A connecting drive plate II is provided between the presser foot reciprocating drive rod and the presser foot mechanism, and a presser foot connecting block is provided between the connecting drive plate II and the presser foot mechanism. The presser foot mechanism includes a connecting shaft that is inserted and fixedly connected to the needle reciprocating drive shaft. A presser foot guide block is provided on the connecting shaft and slidably sleeved with it. An embroidery needle is provided at the lower end of the connecting shaft. A rope embroidery presser foot is provided between the periphery of the embroidery needle and the presser foot guide block, and is connected and fixedly fixed to the presser foot guide block with a screw. By combining active drive and spring floating, the limitations of traditional presser feet in handling thick rope threads are solved. Precise and active control of the presser foot movement is achieved, thereby significantly improving the quality and production efficiency of rope embroidery products.

Description

Technical Field

[0001] This utility model relates to the field of rope embroidery machine technology, specifically to a rope embroidery presser foot mechanism. Background Technology

[0002] With the increasing market demand for personalized, three-dimensional, and diversified embroidery, rope embroidery (also known as cord embroidery or thick thread embroidery) has emerged. It uses thicker cotton rope, ribbon, wool thread, etc. as embroidery thread to create patterns with a three-dimensional feel and rich texture.

[0003] However, when embroidery machines attempt to perform rope embroidery, the limitations of traditional presser foot mechanisms become apparent, leading to serious technical bottlenecks: (1) Insufficient space, resulting in missing or broken lines: The diameter of the cord is much larger than that of ordinary embroidery thread. When the needle is lifted, the traditional presser foot can only lift to a very limited height, and this narrow space is insufficient to accommodate the thick cord.

[0004] As a result, during the upward retraction of the embroidery needle, the needle tip can easily snag on the thread that has not yet fully settled, causing the thread to be pulled, deformed, or even broken, resulting in production interruptions and defective products.

[0005] (1) The fabric is not pressed firmly and wrinkles: The rope is relatively stiff and thick, and when it is pulled into the fabric, it will exert a strong pushing force on the fabric.

[0006] The pressure of a traditional presser foot is fixed and limited. Faced with such a strong pushing force, it cannot effectively press down the fabric, causing the fabric around the embroidery needle to wrinkle and bulge severely.

[0007] This directly leads to inconsistent stitch lengths, distorted patterns, and extremely poor embroidery quality.

[0008] (3) Uneven stitches and rough finish: Due to the aforementioned issues with outlining and fabric wrinkling, the resulting rope embroidery stitches will be uneven in tightness and disordered, failing to create a smooth, full, and aesthetically pleasing three-dimensional effect. They will appear very rough and lose the artistic value that rope embroidery should possess.

[0009] (4) Damage to the mechanism: Abnormal friction and snagging between thick rope and high-speed moving parts such as presser feet and embroidery needles can accelerate the wear of these precision parts and even cause them to deform or be damaged. Summary of the Invention

[0010] This invention addresses the shortcomings of existing technologies by providing a rope embroidery presser foot mechanism. Through a combination of active drive and spring floating, it overcomes the limitations of traditional presser feet when handling thick ropes. This achieves precise and active control of the presser foot's movement, significantly improving the quality and production efficiency of rope embroidery products.

[0011] The above-mentioned technical problems of this utility model are mainly solved by the following technical solutions: A rope embroidery presser foot mechanism includes a presser foot mechanism, an embroidery needle reciprocating drive shaft at the upper end of the presser foot mechanism, a presser foot reciprocating drive rod on the side of the presser foot mechanism, a connecting drive plate II between the presser foot reciprocating drive rod and the presser foot mechanism, and a presser foot connecting block between the connecting drive plate II and the presser foot mechanism. The presser foot mechanism includes a connecting shaft that is inserted and fixedly connected to the embroidery needle reciprocating drive shaft, a presser foot guide block that is slidably sleeved on the connecting shaft, an embroidery needle at the lower end of the connecting shaft, and a rope embroidery presser foot that is inserted and fixedly connected to the presser foot guide block by a screw between the periphery of the embroidery needle and the presser foot guide block.

[0012] Preferably, the lower part of the connecting drive plate II has an oblong groove in the middle, and the oblong groove is provided with a connecting bolt that is threadedly fixed to the pressure foot connecting block. The lower rear end of the connecting drive plate II is provided with a fixing bolt II, and the lower front end of the connecting drive plate II is provided with a reset lever.

[0013] Preferably, the upper end of the reciprocating drive rod of the presser foot is provided with a connecting drive plate I, the connecting drive plate I has an "L"-shaped structure, a pull rod is provided between the other end of the connecting drive plate I and the upper end of the connecting drive plate II, and a fixing bolt I is provided in the middle of the connecting drive plate I.

[0014] Preferably, a spring is provided between the reciprocating drive shaft of the embroidery needle and the guide block of the presser foot, which is sleeved with the connecting shaft. A spring seat is provided between the spring and the reciprocating drive shaft of the embroidery needle, which is threadedly sleeved with the reciprocating drive shaft of the embroidery needle and inserted through the connecting shaft.

[0015] Preferably, the upper end of the connecting shaft is provided with a limiting hole for pin-pin engagement with the reciprocating drive shaft of the embroidery needle.

[0016] Preferably, an embroidery needle assembly joint is provided between the embroidery needle and the connecting shaft.

[0017] This invention can achieve the following effects: This invention provides a presser foot mechanism for rope embroidery. Compared with existing technologies, it overcomes the limitations of traditional presser feet when handling thick rope threads through a combination of active drive and spring floating. It achieves precise and active control of the presser foot's movement, thereby significantly improving the quality and production efficiency of rope embroidery products.

[0018] Independent drive and precise control of the presser foot: The biggest innovation lies in the fact that the movement of the presser foot no longer relies entirely on the passive return of the spring, but is actively controlled by an independent drive rod-linkage mechanism. This allows the lifting height and timing of the presser foot to be precisely set, perfectly matching the special requirements of rope embroidery.

[0019] Floating pressure design: The presence of springs ensures that the presser foot always applies appropriate and flexible pressure to the fabric, which can both compress the fabric and prevent damage to the fabric or affect the thread feeding due to excessive pressure.

[0020] The ingenious application of the oval groove: The oval groove on the connecting drive plate II provides a certain "tolerance" to absorb and compensate for minor errors or asynchrony in mechanical transmission, ensuring smoothness and reliability of movement and preventing the mechanism from jamming.

[0021] Modular and adjustable: The spring seat is adjustable to accommodate fabrics of different thicknesses and materials. All components are connected by bolts and pins for easy installation, disassembly, and maintenance. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of this utility model.

[0023] Figure 2 This is a schematic diagram of the presser foot mechanism in this utility model.

[0024] Figure 3 This is a structural cross-sectional view of the presser foot mechanism in this utility model.

[0025] In the diagram: 1. Presser foot reciprocating drive rod; 2. Connecting drive plate I; 3. Fixing bolt I; 4. Pull rod; 5. Embroidery needle reciprocating drive shaft; 6. Spring seat; 7. Spring; 8. Connecting drive plate II; 9. Reset lever; 10. Presser foot connecting block; 11. Presser foot mechanism; 12. Connecting bolt; 13. Oval groove; 14. Fixing bolt II; 15. Connecting shaft; 16. Limiting hole; 17. Presser foot guide block; 18. Cord embroidery presser foot; 19. Embroidery needle assembly joint; 20. Embroidery needle. Detailed Implementation

[0026] The technical solution of this utility model will be further described in detail below through embodiments and in conjunction with the accompanying drawings.

[0027] Example: Figure 1 , Figure 2 and Figure 3As shown, a rope embroidery presser foot mechanism includes a presser foot mechanism 11. A needle reciprocating drive shaft 5 is located inside the upper end of the presser foot mechanism 11. A presser foot reciprocating drive rod 1 is located on the side of the presser foot mechanism 11. A connecting drive plate II 8 is located between the presser foot reciprocating drive rod 1 and the presser foot mechanism 11. A connecting drive plate I 2 is located at the upper end of the presser foot reciprocating drive rod 1. The connecting drive plate I 2 has an "L"-shaped structure. A pull rod 4 is located between the other end of the connecting drive plate I 2 and the upper end of the connecting drive plate II 8. A fixing bolt I 3 is located in the middle of the connecting drive plate I 2. A presser foot connecting block 10 is located between the connecting drive plate II 8 and the presser foot mechanism 11. A circular groove 13 is located in the middle of the lower part of the connecting drive plate II 8. A connecting bolt 12, which is threadedly connected and fixed to the presser foot connecting block 10, is located on the circular groove 13. A fixing bolt II 14 is located at the rear end of the lower part of the connecting drive plate II 8. A reset lever 9 is located at the front end of the lower part of the connecting drive plate II 8.

[0028] The presser foot mechanism 11 includes a connecting shaft 15 that is inserted and fixedly connected to the reciprocating drive shaft 5 of the embroidery needle. The upper end of the connecting shaft 15 has a limiting hole 16 for pin insertion into the reciprocating drive shaft 5. A presser foot guide block 17 is provided on the connecting shaft 15 and slidably sleeved with it. An embroidery needle 20 is provided at the lower end of the connecting shaft 15, and an embroidery needle assembly joint 19 is provided between the embroidery needle 20 and the connecting shaft 15. A rope embroidery presser foot 18 is provided around the embroidery needle 20 and between it and the presser foot guide block 17, and is screwed and fixed to the presser foot guide block 17. A spring 7 is provided between the reciprocating drive shaft 5 of the embroidery needle and the presser foot guide block 17 and sleeved with the connecting shaft 15. A spring seat 6 is provided between the spring 7 and the reciprocating drive shaft 5, threadedly sleeved with the reciprocating drive shaft 5 and penetratingly inserted into the connecting shaft 15.

[0029] Overall workflow: Initial state: Spring 7 applies downward pressure, causing the embroidery presser foot 18 to press lightly onto the fabric.

[0030] Needle insertion: The reciprocating drive shaft 5 of the embroidery needle drives the connecting shaft 15 and the embroidery needle 20 to move downwards. At the same time, the reciprocating drive rod 1 of the presser foot also pushes the presser foot guide block 17 and the cord embroidery presser foot 18 downwards through a complete linkage mechanism (connecting drive plate I 2 -> pull rod 4 -> connecting drive plate II 8 -> presser foot connecting block 10). At this time, the presser foot firmly presses down on the fabric, providing a stable environment for the embroidery needle to pierce and preventing thick thread from being brought in and causing the fabric to bulge.

[0031] Needle lifting: The needle 20 is lifted upwards. At the same time, the presser foot reciprocating drive rod 1 drives the linkage mechanism, lifting the cord embroidery presser foot 18 upwards a certain distance. This lifting action leaves enough space for the thick cord, preventing the needle from snagging or rubbing against the thread when retracting, and also facilitates the formation of full and even stitches.

[0032] The auxiliary role of the spring: Throughout the process, spring 7 always applies downward pressure. When the drive system pushes the presser foot down, the spring force works together to increase the clamping force; when the drive system pulls the presser foot up, the spring is compressed, storing energy to prepare for the next downward press and ensuring that the presser foot does not accidentally detach from the fabric.

[0033] Repeated cycle: The above process is repeated at high speed to achieve continuous, high-quality rope embroidery.

[0034] In summary, this rope embroidery presser foot mechanism, through a combination of active drive and spring floating, overcomes the limitations of traditional presser feet when handling thick rope threads. It achieves precise and active control of the presser foot's movement, thereby significantly improving the quality and production efficiency of rope embroidery products.

[0035] Dual power sources: The movement of the embroidery needle is driven by the main shaft, and the movement of the presser foot is driven by an independent drive rod, with the two working together.

[0036] Spring-floating: Provides flexible compressive force to protect the fabric.

[0037] Oval groove tolerance: greatly improves the reliability and smoothness of the mechanism, and is a mature technique in mechanical design.

[0038] Adjustable pressure: The spring seat 6 can be easily adapted to different working conditions.

[0039] It will be apparent to those skilled in the art that this invention is not limited to the details of the above exemplary embodiments, and that it can be implemented in other specific forms without departing from the essential characteristics of the invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0040] In summary, the above description is only a specific embodiment of the present utility model, but the structural features of the present utility model are not limited thereto. Any changes or modifications made by those skilled in the art within the scope of the present utility model are covered by the patent scope of the present utility model.

Claims

1. A corded presser foot mechanism characterized by: The device includes a presser foot mechanism (11), with a needle reciprocating drive shaft (5) inside the upper end of the presser foot mechanism (11), a presser foot reciprocating drive rod (1) on the side of the presser foot mechanism (11), a connecting drive plate II (8) between the presser foot reciprocating drive rod (1) and the presser foot mechanism (11), and a presser foot connecting block (10) between the connecting drive plate II (8) and the presser foot mechanism (11); the presser foot mechanism (11) includes a connecting shaft (15) that is inserted and fixed to the needle reciprocating drive shaft (5), a presser foot guide block (17) that is slidably sleeved on the connecting shaft (15), a needle (20) at the lower end of the connecting shaft (15), and a rope embroidery presser foot (18) that is inserted and fixed to the presser foot guide block (17) between the outer periphery of the needle (20) and the presser foot guide block (17).

2. A thread chain presser mechanism according to claim 1, wherein: The lower middle part of the connecting drive plate II (8) is provided with an oval groove (13), and the oval groove (13) is provided with a connecting bolt (12) that is threadedly fixed to the pressure foot connecting block (10). The lower rear end of the connecting drive plate II (8) is provided with a fixing bolt II (14), and the lower front end of the connecting drive plate II (8) is provided with a reset lever (9).

3. The rope embroidery presser foot mechanism according to claim 1, characterized in that: The upper end of the reciprocating drive rod (1) of the presser foot is provided with a connecting drive plate I (2), the connecting drive plate I (2) is in the shape of an "L" and a pull rod (4) is provided between the other end of the connecting drive plate I (2) and the upper end of the connecting drive plate II (8). The middle part of the connecting drive plate I (2) is provided with a fixing bolt I (3).

4. The rope embroidery presser foot mechanism according to claim 1, characterized in that: A spring (7) is provided between the reciprocating drive shaft (5) of the embroidery needle and the guide block (17) of the presser foot, and is sleeved with the connecting shaft (15). A spring seat (6) is provided between the spring (7) and the reciprocating drive shaft (5), and is threadedly sleeved with the reciprocating drive shaft (5) and inserted through the connecting shaft (15).

5. A thread chain presser mechanism according to claim 1, wherein: The upper end of the connecting shaft (15) is provided with a limiting hole (16) that is pin-connected to the reciprocating drive shaft (5) of the embroidery needle.

6. The cord embroidery presser foot mechanism according to claim 1, characterized in that: The embroidery needle (20) and the connecting shaft (15) are provided with an embroidery needle assembly joint (19).

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