A thread guide for a sewing machine

Abstract

This utility model relates to the field of sewing machines and discloses a needle and thread guide device for a sewing machine, including a mounting base. The sewing machine is fixedly mounted on the upper surface of the mounting base, and a fixing plate and fixing rings are fixedly mounted on the sewing machine. Multiple fixing rings are equidistantly fixed to the fixing plate. Each fixing ring has a through groove on its outer wall, and two connecting blocks and a blocking device are symmetrically arranged on the inner side wall of each through groove, fixedly installed between every two connecting blocks. In this utility model, a handle flexibly controls the clamping force of the fixing plate on the thread spool. Pushing the handle helps stabilize the thread spool, while pulling the handle facilitates quick thread spool replacement, balancing sewing quality and efficiency. The blocking blocks, in conjunction with a torsion spring, achieve unidirectional guidance, flexibly rotating to guide the thread during threading, and quickly resetting to close the through groove after threading, improving manual threading efficiency and ensuring stable sewing operations.

Description

Technical Field

[0001] This utility model relates to the field of sewing machine technology, and in particular to a needle and thread guide device for a sewing machine. Background Technology

[0002] Since its invention in the late 18th century, the sewing machine has evolved from manual operation to electric and automated operation, and is widely used in clothing manufacturing, home textiles, and industrial fabric processing. Early sewing machines were primarily mechanically driven, relying on manual operation, resulting in low efficiency and limited functionality. With the Industrial Revolution and the upgrading of the textile industry, electric and electronically controlled sewing machines gradually became widespread, achieving improvements in sewing speed and stitch diversity.

[0003] Existing devices have a simple thread spool fixing structure, which is prone to shaking and loosening during high-speed sewing, resulting in unstable needle and thread tension and causing problems such as thread breakage and skipped stitches. On the other hand, the needle and thread guiding mechanism lacks adaptive adjustment capability, making it difficult to handle needles and threads of different materials and thicknesses. Moreover, the threading process is cumbersome and the manual operation is inefficient. Therefore, a needle and thread guide device for sewing machines is proposed to solve the above problems. Utility Model Content

[0004] In order to overcome the above-mentioned defects of the prior art, the present invention provides a needle and thread guide device for a sewing machine.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A needle and thread guide device for a sewing machine includes a mounting base, characterized in that: a sewing machine is fixedly mounted on the upper end face of the mounting base, and a fixing plate is fixedly mounted on the sewing machine; The fixing rings are provided in multiple ways. The multiple fixing rings are fixedly installed on the fixing plate at equal intervals. Each fixing ring has a through groove on its outer wall and two connecting blocks are symmetrically provided on the inner side wall of each through groove. A blocking device is fixedly installed between every two connecting blocks; There are two fixing rods, which are respectively fixedly installed on the upper surface of the mounting base. The top ends of the two fixing rods are jointly fixedly installed on the mounting plate. The upper surface of the mounting plate is symmetrically opened with two first mounting grooves, and each first mounting groove is provided with a limiting device. The upper surface of the mounting plate is opened with a second mounting groove, and the second mounting groove is provided with a fixing device. As a further description of the above technical solution: Each of the blocking devices includes a fixed shaft, which is rotatably mounted between two corresponding connecting blocks. Two mounting blocks are symmetrically fixedly mounted on the outer wall of the fixed shaft. A blocking block is fixedly connected to one side of both mounting blocks. A torsion spring is fixedly connected to one side of each mounting block, and the ends of the two torsion springs away from the mounting blocks are respectively fixedly connected to one side of the two connecting blocks. As a further description of the above technical solution: Each of the limiting devices includes a first spring, and the first spring is fixedly connected to the inner side wall of the first mounting groove. One end of the first spring is fixedly connected to a fixing block, and the fixing block is slidably connected in the first mounting groove. A fixing clamp is fixedly installed on the upper end face of the fixing block, and a top block is fixedly installed on one side of the fixing clamp. As a further description of the above technical solution: The fixing device includes a second spring, which is fixedly connected to the inner side wall of the second mounting groove. One end of the second spring is fixedly connected to a push plate, and a guide block is fixedly installed on the upper end face of the push plate. As a further description of the above technical solution: A handle is fixedly installed at the end of the push plate away from the second spring; As a further description of the above technical solution: One end of each of the top blocks is rounded.

[0006] This utility model has the following beneficial effects: 1. In this utility model, by setting up a fixing device, a limiting device, etc., the operator can use the handle to control the clamping force of the fixing plate 8 pairs of thread spools through the cooperation of the fixing device and the limiting device. When the handle is pushed forward, the spring assists in increasing the clamping force to ensure that the thread spools are stable and do not shake during the sewing process. When changing the thread spools, the clamping plate can be quickly released by pulling the handle, which simplifies the operation process, ensures sewing quality and improves work efficiency.

[0007] 2. In this utility model, by setting up a blocking device, a fixing ring, a through groove, etc., when the knitting thread passes through the through groove, the blocking block can rotate flexibly to guide the thread through; after the thread passes through, the torsion spring quickly resets and drives the blocking block to close the through groove, which can quickly thread the wire into the fixing ring, effectively improving the efficiency of manually threading the knitting thread. Attached Figure Description

[0008] Figure 1 This is a three-dimensional schematic diagram of a needle and thread guide device for a sewing machine according to the present invention. Figure 2 This is a schematic diagram of the structure of the mounting plate for the needle and thread guide device of a sewing machine according to the present invention. Figure 3This is a schematic diagram of the first mounting groove of a needle and thread guide device for a sewing machine according to the present invention. Figure 4 This is a schematic diagram of the blocking device of a sewing machine needle and thread guide device proposed in this utility model.

[0009] Legend: 1. Mounting base; 2. Sewing machine; 3. Fixing plate; 4. Fixing rod; 5. Mounting plate; 6. First mounting slot; 7. First spring; 8. Fixing clamp; 9. Fixing block; 10. Second mounting slot; 11. Second spring; 12. Push plate; 13. Handle; 14. Fixing ring; 15. Connecting block; 16. Fixing shaft; 17. Torsion spring; 18. Mounting block; 19. Guide block; 20. Blocking block. Detailed Implementation

[0010] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0011] Reference Figures 1-4This utility model provides an embodiment of a needle and thread guide device for a sewing machine, comprising a mounting base 1, characterized in that: a sewing machine 2 is fixedly mounted on the upper end face of the mounting base 1, a fixing plate 3 is fixedly mounted on the sewing machine 2, a fixing ring 14 is provided, multiple fixing rings 14 are provided, and multiple fixing rings 14 are fixedly mounted on the fixing plate 3 at equal intervals, each fixing ring 14 has a through groove on its outer wall, and two connecting blocks 15 are symmetrically provided on the inner side wall of each through groove, a blocking device is fixedly installed between every two connecting blocks 15, and two fixing rods 4 are provided, the two fixing rods 4 being fixed respectively. Mounting plate 5 is fixedly mounted on the upper surface of mounting base 1, with the top ends of two fixing rods 4 together. Two first mounting grooves 6 are symmetrically formed on the upper surface of mounting plate 5, each containing a limiting device. A second mounting groove 10 is formed on the upper surface of mounting plate 5, containing a fixing device. Each blocking device includes a fixing shaft 16, which is rotatably mounted between two corresponding connecting blocks 15. Two mounting blocks 18 are symmetrically fixedly mounted on the outer wall of the fixing shaft 16. A blocking block 20 is fixedly connected to one side of each mounting block 18. Each mounting block 18 has a torsion spring 17 fixedly connected to one side, and the ends of the two torsion springs 17 away from the mounting block 18 are respectively fixedly connected to one side of the two connecting blocks 15. When the needle thread passes through the through groove, the blocking block 20 rotates around the fixed shaft 16 under the pushing force of the needle thread, forming a passage to allow the needle thread to pass smoothly. Each limiting device includes a first spring 7, and the first spring 7 is fixedly connected to the inner side wall of the first mounting groove 6. One end of the first spring 7 is fixedly connected to a fixing block 9, and the fixing block 9 is slidably connected in the first mounting groove 6. A fixing clamp 8 is fixedly installed on the upper end face of the fixing block 9. A top block is fixedly installed on the side. The fixing device includes a second spring 11, which is fixedly connected to the inner wall of the second mounting groove 10. One end of the second spring 11 is fixedly connected to a push plate 12, and a guide block 19 is fixedly installed on the upper end face of the push plate 12. Under normal conditions, the second spring 11 pulls the push plate 12, causing the guide block 19 at the upper end of the push plate to press against the top block, maintaining the clamping state of the fixed clamping plate 8 on the coil and ensuring that the coil is stable and does not loosen. A handle 13 is fixedly installed on the end of the push plate 12 away from the second spring 11. The handle 13 at the end of the plate 12 provides the operator with a convenient manual control method. By pushing and pulling the handle 13, the pressure of the guide block 19 on the top block can be easily adjusted. One end of each top block is rounded, and the rounded corner design facilitates the passage of the guide block 19 through the top block.

[0012] Working principle: In use, the operator places the spool between the two fixed clamps 8 and secures it by operating the fixing device. When the handle 13 is pushed forward, the push plate 12 moves forward with the assistance of the second spring 11. The guide block 19 at the upper end of the push plate 12 pushes the top block on the fixed clamp 8. The top block drives the fixed clamp 8 to move towards the inner wall of the spool and press against it tightly. At the same time, the fixed clamp 8 drives the fixing block 9 to compress the first spring 7. Under normal conditions, the second spring 11 pulls the push plate 12, causing the guide block 19 to continuously press against the top block, maintaining the clamping state of the fixed clamping plate 8 on the wire reel, further ensuring the stability of the wire reel and preventing poor wire output due to loosening. If the reel needs to be replaced, pull the handle 13 to move the push plate 12 backward, and the guide block 19 will move away from the top block. At this time, the first spring 7, which has lost the external force, will reset and push the fixing block 9 to move the fixing clamp 8 away from the inner wall of the reel, so that the reel can be easily removed and the replacement operation can be completed conveniently and quickly. During the thread guiding operation, the knitting thread is passed through the slot of the fixing ring 14. When the thread contacts the blocking block 20 and a pushing force is applied, the blocking block 20 drives the connecting block 15 and the fixing shaft 16 to rotate. At the same time, the torsion spring 17 is torsionally deformed. As the knitting thread smoothly passes through the blocking block 20 and enters the interior of the fixing ring 14, the external force disappears, and the torsion spring 17 returns to its original position due to its elasticity. Simultaneously, it drives the fixing shaft 16 and the mounting block 18 to return to their original positions. The blocking block 20 follows the mounting block 18 back to its initial position, blocking and closing the slot. This design achieves unidirectional needle and thread passage, ensuring that the knitting thread passes through quickly and smoothly, while preventing the thread from retreating backward or becoming loose and tangled during sewing, ensuring stable sewing operations.

[0013] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A thread guide device for a sewing machine comprising a mounting base (1), characterized in that: A sewing machine (2) is fixedly installed on the upper surface of the mounting base (1), and a fixing plate (3) is fixedly installed on the sewing machine (2). A fixing ring (14) is provided in multiple ways. The multiple fixing rings (14) are fixedly installed on the fixing plate (3) at equal intervals. Each fixing ring (14) has a through groove on its outer wall and two connecting blocks (15) are symmetrically provided on the inner side wall of each through groove. A blocking device is fixedly installed between every two connecting blocks (15); There are two fixing rods (4). The two fixing rods (4) are respectively fixedly installed on the upper surface of the mounting base (1). The top ends of the two fixing rods (4) are jointly fixedly installed with a mounting plate (5). The upper surface of the mounting plate (5) is symmetrically opened with two first mounting grooves (6). Each first mounting groove (6) is provided with a limiting device. The upper surface of the mounting plate (5) is opened with a second mounting groove (10). The second mounting groove (10) is provided with a fixing device.

2. A thread guide for a sewing machine as claimed in claim 1, wherein: Each of the blocking devices includes a fixed shaft (16), which is rotatably mounted between two corresponding connecting blocks (15). Two mounting blocks (18) are symmetrically fixed on the outer wall of the fixed shaft (16). A blocking block (20) is fixedly connected to one side of the two mounting blocks (18). A torsion spring (17) is fixedly connected to one side of each mounting block (18), and the ends of the two torsion springs (17) away from the mounting blocks (18) are fixedly connected to one side of the two connecting blocks (15).

3. The thread guide of claim 1 wherein: Each of the limiting devices includes a first spring (7), and the first spring (7) is fixedly connected to the inner side wall of the first mounting groove (6). One end of the first spring (7) is fixedly connected to a fixing block (9), and the fixing block (9) is slidably connected in the first mounting groove (6). A fixing clamp (8) is fixedly installed on the upper end face of the fixing block (9), and a top block is fixedly installed on one side of the fixing clamp (8).

4. The thread guide of claim 1 wherein: The fixing device includes a second spring (11), and the second spring (11) is fixedly connected to the inner wall of the second mounting groove (10). One end of the second spring (11) is fixedly connected to a push plate (12), and a guide block (19) is fixedly installed on the upper end surface of the push plate (12).

5. A thread guide for a sewing machine according to claim 4, wherein: A handle (13) is fixedly installed at the end of the push plate (12) away from the second spring (11).

6. The thread guide of claim 3 wherein: One end of each of the top blocks is rounded.

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