A thread feeding device for a sewing machine

Abstract

The utility model relates to sewing machine technical field discloses a thread unwinding device for sewing machine, including mounting panel, the first threaded rod that has the screw engagement in mounting panel, the bottom fixed mounting of first threaded rod has first knob, this thread unwinding device for sewing machine, rotates first knob to make first threaded rod drive fixed plate to move upwards to make fixed plate and mounting panel cooperation to install thread unwinding device, the friction layer that is provided on fixed plate simultaneously, therefore this can better increase the friction between fixed plate and sewing machine desktop, after rotating third knob to make bidirectional threaded rod rotate, when bidirectional threaded rod rotates can drive moving block to adjust distance in the sliding slot to make the tension of guide coil to sewing thread unwinding to adjust to can better prevent thread unwinding device sewing thread tight or too loose when unwinding appears the situation, and influence the sewing effect of sewing machine.

Description

Technical Field

[0001] This utility model relates to the field of sewing machine technology, specifically to a thread feeding device for sewing machines. Background Technology

[0002] A sewing machine is a machine that uses one or more sewing threads to form one or more stitches on a fabric, allowing one or more layers of fabric to interweave or sew together. Sewing machines can sew fabrics such as cotton, linen, silk, wool, and synthetic fibers, as well as products made of leather, plastic, and paper. The stitches produced are neat, beautiful, flat, and strong. Sewing machines are fast and easy to use.

[0003] Traditional thread feeders for sewing machines are cumbersome to install and maintain. They also make it difficult to adjust the tension of the sewing thread, which can affect the sewing quality. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a thread feeding device for sewing machines, which solves the problems mentioned in the background art, such as the cumbersome installation and maintenance of traditional thread feeding devices. Furthermore, traditional thread feeding devices do not facilitate the adjustment of thread tension during thread feeding, which may affect the sewing effect of the subsequent sewing.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a thread feeding device for a sewing machine, comprising a mounting plate, a first threaded rod threadedly engaged within the mounting plate, a first knob fixedly mounted at the bottom of the first threaded rod, a fixing plate fixedly mounted at the top of the first threaded rod, a friction layer provided at the top of the fixing plate, a second threaded rod rotatably mounted at the top of the mounting plate, two stabilizing rods fixedly mounted on the mounting plate, a movable plate slidably mounted on the first threaded rod, a groove formed on the movable plate, a bidirectional threaded rod rotatably mounted within the groove, and a third knob fixedly mounted on the outer end surface of the bidirectional threaded rod.

[0006] Using the above technical solution, rotating the first knob causes the first threaded rod to move the fixed plate upward, thereby allowing the fixed plate and the mounting plate to cooperate and install the thread feeding device. The fixed plate has a friction layer, which effectively increases the friction between the fixed plate and the sewing machine table. Then, rotating the third knob causes the bidirectional threaded rod to rotate. When the bidirectional threaded rod rotates, it drives the moving block to adjust the distance within the groove, allowing the guide coil to adjust the tension of the sewing thread during feeding. This effectively prevents the sewing thread from becoming too tight or too loose during feeding, thus affecting the sewing effect of the sewing machine.

[0007] Preferably, two opposing movable blocks are slidably installed in the groove, and each of the two movable blocks has a bidirectional threaded rod in threaded engagement, and a conductor coil is fixedly installed at the top of each movable block.

[0008] Using the above technical solution, the bidirectional threaded rod is engaged with two moving blocks in the slide groove. Therefore, when the bidirectional threaded rod rotates, it can drive the moving blocks to adjust the distance in the slide groove, thereby allowing the guide coil to adjust the tension of the sewing thread during feeding.

[0009] Preferably, the movable plate has three connection holes. A second threaded rod is threadedly engaged in the connection hole at the middle position of the movable plate. A fourth knob is fixedly installed at the top end of the second threaded rod. Stabilizing rods pass through the connection holes at both ends of the movable plate.

[0010] Using the above technical solution, rotating the fourth knob causes the second threaded rod installed at its bottom to rotate. When the second threaded rod rotates, it can adjust the height of the moving plate, so that the sewing machine can adjust the height of the thread feed when feeding the thread. Then, the stabilizing rod installed inside the moving plate can keep the moving plate stable when moving.

[0011] Preferably, the movable plate has two connecting seats that are rotatably mounted, and each of the two connecting seats has a support rod fixedly mounted on its top end.

[0012] By adopting the above technical solution, the connecting seat installed on the movable plate can effectively drive the support rod to rotate, thereby causing the support rod to drive the pay-off reel to rotate, thus enabling the pay-off reel to pay off the line better.

[0013] Preferably, two opposing springs are fixedly installed inside the support rod, and a limiting block is fixedly installed at the outer end of each spring, with the outer end surface of the limiting block being arc-shaped.

[0014] Using the above technical solution, after the wire feeding reel is installed on the connecting seat, the spring will drive the limiting block to restrict the wire feeding reel, so that the wire feeding reel can wrap around the column on the support rod when feeding the wire.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] 1. The sewing machine uses a thread feeding device. By rotating the first knob, the first threaded rod moves the fixed plate upward, allowing the fixed plate to engage with the mounting plate to install the thread feeding device. The fixed plate has a friction layer, which effectively increases the friction between the fixed plate and the sewing machine table. Then, by rotating the third knob, the double-threaded rod rotates. When the double-threaded rod rotates, it moves the moving block within the groove to adjust the distance, thereby adjusting the tension of the thread during thread feeding. This effectively prevents the thread from becoming too tight or too loose during feeding, which would affect the sewing effect of the machine.

[0017] 2. The sewing machine uses a thread feeding device. By rotating the fourth knob, the second threaded rod installed at its bottom rotates. When the second threaded rod rotates, it can adjust the height of the moving plate, allowing the sewing machine to adjust the thread feeding height during thread feeding. The stabilizing rod installed inside the moving plate ensures the stability of the moving plate during movement. The connecting seat installed on the moving plate can effectively drive the support rod to rotate, which in turn drives the thread feeding reel to rotate, allowing the thread feeding reel to feed thread more efficiently. After the thread feeding reel is installed on the connecting seat, the spring will drive the limiting block to restrain the thread feeding reel, causing the thread feeding reel to wrap around the support rod during thread feeding. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the thread feeding device for a sewing machine according to this utility model;

[0019] Figure 2 This is a top view of the thread feeding device for a sewing machine according to this utility model;

[0020] Figure 3 This is a schematic diagram of the movable plate and related structures of this utility model;

[0021] Figure 4 This is a schematic diagram of the internal structure of the support rod of this utility model.

[0022] In the diagram: 1. Mounting plate; 2. First threaded rod; 3. First knob; 4. Fixing plate; 5. Second threaded rod; 6. Stabilizing rod; 7. Moving plate; 8. Slide groove; 9. Bidirectional threaded rod; 10. Third knob; 11. Moving block; 12. Conductor coil; 13. Connecting hole; 14. Fourth knob; 15. Connecting seat; 16. Support rod; 17. Spring; 18. Limiting block. Detailed Implementation

[0023] 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.

[0024] Example 1:

[0025] Referring to Figures 1-4, a thread feeding device for a sewing machine includes a first threaded rod 2 threadedly engaged within a mounting plate 1. A first knob 3 is fixedly mounted at the bottom of the first threaded rod 2. A fixing plate 4 is fixedly mounted at the top of the first threaded rod 2, and a friction layer is provided at the top of the fixing plate 4. A second threaded rod 5 is rotatably mounted at the top of the mounting plate 1. Two stabilizing rods 6 are fixedly mounted on the mounting plate 1. A movable plate 7 is slidably mounted on the first threaded rod 2. A groove 8 is formed on the movable plate 7. A bidirectional threaded rod 9 is rotatably mounted within the groove 8. A third knob 10 is fixedly mounted on the outer end surface of the bidirectional threaded rod 9. Two opposing movable blocks 11 are slidably mounted within the groove 8. Both movable blocks 11 have bidirectional threaded rods 9 threadedly engaged within them. A guide coil 12 is fixedly mounted at the top of each movable block 11.

[0026] Working principle: When the thread feeder needs to be installed, the operator places the mounting plate 1 onto the edge of the sewing machine table. Then, the operator rotates the first knob 3, causing the first threaded rod 2 to rotate. As the first threaded rod 2 rotates, it moves the fixing plate 4 upwards, allowing the fixing plate 4 to engage with the mounting plate 1 to install the thread feeder. The fixing plate 4 has a friction layer, which effectively increases the friction between the fixing plate 4 and the sewing machine table, ensuring a stable installation of the thread feeder. When maintenance is required... Disassembly is relatively simple. When it is necessary to adjust the tension of the sewing thread during feeding, the operator rotates the third knob 10, which in turn drives the bidirectional threaded rod 9 to rotate. Since the bidirectional threaded rod 9 is engaged with two moving blocks 11 in the slide groove 8, when the bidirectional threaded rod 9 rotates, it can drive the moving blocks 11 to adjust the distance in the slide groove 8. This allows the guide coil 12 to adjust the tension of the sewing thread during feeding, thus effectively preventing the sewing thread from becoming too tight or too loose during feeding, which would affect the sewing effect of the sewing machine.

[0027] Example 2:

[0028] Referring to Figures 1-4, a thread feeding device for a sewing machine is described. The movable plate 7 has three connecting holes 13. A second threaded rod 5 is threadedly engaged within the connecting hole 13 at the center of the movable plate 7. A fourth knob 14 is fixedly installed at the top of the second threaded rod 5. Stabilizing rods 6 penetrate through the connecting holes 13 at both sides of the movable plate 7. Two connecting seats 15 are rotatably mounted on the movable plate 7. A support rod 16 is fixedly installed at the top of each of the two connecting seats 15. Two opposing springs 17 are fixedly installed inside the support rods 16. A limiting block 18 is fixedly installed at the outer end of each spring 17, and the outer surface of the limiting block 18 is arc-shaped.

[0029] Working principle: When the height of the thread feed needs to be adjusted, the operator rotates the fourth knob 14, which in turn rotates the second threaded rod 5 installed at its bottom. When the second threaded rod 5 rotates, it can adjust the height of the moving plate 7, thus allowing the sewing machine to adjust the thread feed height during thread feeding. The stabilizing rod 6 installed inside the moving plate 7 ensures that the moving plate 7 remains stable during movement. The connecting seat 15 installed on the moving plate 7 can effectively drive the support rod 16 to rotate, which in turn drives the thread feed reel to rotate, allowing the thread feed reel to feed thread more effectively. After the thread feed reel is installed on the connecting seat 15, the spring 17 will drive the limiting block 18 to restrict the thread feed reel, so that the thread feed reel can wrap around the support rod 16 during thread feeding.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A thread feeding device for a sewing machine, comprising a mounting plate (1), characterized in that: The mounting plate (1) has a first threaded rod (2) threaded in the center. A first knob (3) is fixedly installed at the bottom of the first threaded rod (2). A fixing plate (4) is fixedly installed at the top of the first threaded rod (2). A friction layer is provided at the top of the fixing plate (4). A second threaded rod (5) is rotatably installed at the top of the mounting plate (1). Two stabilizing rods (6) are fixedly installed on the mounting plate (1). A moving plate (7) is slidably installed on the first threaded rod (2). A sliding groove (8) is opened on the moving plate (7). A bidirectional threaded rod (9) is rotatably installed in the sliding groove (8). A third knob (10) is fixedly installed on the outer end surface of the bidirectional threaded rod (9).

2. The thread feeding device for a sewing machine according to claim 1, characterized in that: Two opposing movable blocks (11) are slidably installed in the groove (8). Both movable blocks (11) have bidirectional threaded rods (9) threaded into each other. A conductor coil (12) is fixedly installed at the top of each movable block (11).

3. The thread feeding device for a sewing machine according to claim 1, characterized in that: The movable plate (7) has three connecting holes (13). A second threaded rod (5) is threaded in the connecting hole (13) in the middle position of the movable plate (7). A fourth knob (14) is fixedly installed at the top of the second threaded rod (5). A stabilizing rod (6) passes through the connecting holes (13) on both sides of the movable plate (7).

4. The thread feeding device for a sewing machine according to claim 1, characterized in that: The movable plate (7) has two connecting seats (15) that are rotatably mounted on it, and a support rod (16) is fixedly mounted on the top of each of the two connecting seats (15).

5. A thread feeding device for a sewing machine according to claim 4, characterized in that: The support rod (16) has two opposing springs (17) fixedly installed inside. The outer end of the springs (17) is fixedly installed with a limiting block (18), and the outer end surface of the limiting block (18) is arc-shaped.

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