Thread clamping adjuster capable of visually adjusting thread tension and sewing machine

Abstract

The utility model provides a thread clamping adjuster capable of visually adjusting thread tension and a sewing machine, and belongs to the technical field of sewing equipment. The thread clamping adjuster comprises a thread clamping screw, a thread clamping piece, a pressure adjusting stop cover, a thread clamping spring and an adjusting knob, one end of the thread clamping screw sequentially penetrates through the thread clamping piece, the pressure adjusting stop cover and the thread clamping spring and is in threaded connection with the adjusting knob, the thread clamping spring is located between the pressure adjusting stop cover and the adjusting knob, the pressure adjusting stop cover is provided with a protruding edge, and a first notch is formed in the protruding edge. Scale marks are arranged on the edge of the first notch, and a scale ring opposite to the scale marks is arranged at the inner end of the adjusting knob. According to the thread clamping regulator, the thread tension is regulated by adopting a mechanical structure, the visual regulation of the thread tension is realized under the condition of lower cost, the regulation is convenient, and the working efficiency is high.

Description

Technical Field

[0001] This utility model belongs to the field of sewing equipment technology, and relates to a thread tension adjuster and sewing machine with visual adjustment of thread tension. Background Technology

[0002] Sewing machines typically control thread tension by adjusting the clamping force of the thread tensioner. Different thread tensions need to be set for different sewing conditions. For example, thin materials such as mesh and skin garments require a lower thread tension, while thicker materials such as multi-layered denim require a higher thread tension. However, operators often lack a standard reference when adjusting the thread tensioner and rely on repeated sewing trials to determine if the adjustment is correct, resulting in low efficiency.

[0003] To address the aforementioned technical issues, patent document CN104928856B proposes an intelligent template sewing machine with automatic thread tension adjustment. This sewing machine is equipped with an electromagnetic tension adjuster and a thread tension sensor on the machine head. The control unit reads the current thread speed, and the tablet computer makes terminal judgments. The predicted tension value and the actual tension value are compared in real time to adjust the current of the electromagnetic coil, thereby achieving intelligent and automatic control of the thread tension.

[0004] The aforementioned intelligent template sewing machine can adjust thread tension relatively efficiently, but its drawback is its high cost. Summary of the Invention

[0005] This invention addresses the aforementioned problems in the prior art by providing a wire tension visual adjustment device. The technical problem this invention aims to solve is: how to efficiently adjust wire tension.

[0006] The objective of this utility model can be achieved through the following technical solutions:

[0007] A wire tension visual adjustment device includes a wire tension screw, two opposing wire tension plates, a pressure adjustment stop cover, a wire tension spring, and an adjustment knob. One end of the wire tension screw passes sequentially through the wire tension plates, the pressure adjustment stop cover, and the wire tension spring and is threadedly connected to the adjustment knob. The wire tension spring is located between the pressure adjustment stop cover and the adjustment knob. The pressure adjustment stop cover has a raised edge with a notch, and the edge of the notch has a scale line. The inner end of the adjustment knob is provided with a scale ring that aligns with the scale line.

[0008] Its working principle is as follows: The thread clamping screw is fixed on the sewing machine housing. Under the elastic force of the thread clamping spring, the two opposing thread clamping plates are pressed between the housing and the pressure adjusting stop cover. The thread is clamped by the two thread clamping plates. When adjusting, the operator only needs to turn the adjusting knob. The adjusting knob moves axially on the thread clamping screw at the same time. The compression of the thread clamping spring between the pressure adjusting stop cover and the adjusting knob changes. The mark ring on the adjusting knob corresponds to different positions of the scale line on the pressure adjusting stop cover, thereby determining the compression of the thread clamping spring and realizing the visual adjustment of the thread tension.

[0009] This wire tension adjuster uses a mechanical structure to adjust wire tension, enabling visual adjustment of wire tension at a low cost. It is convenient to adjust and highly efficient.

[0010] In the above-mentioned wire tension visual adjustment wire clamp adjuster, the wire clamp adjuster further includes an adjuster base, one end of the wire clamp screw is fixed on the adjuster base, the wire clamp spring is in a compressed state and the two wire clamping plates are pressed between the adjuster base and the pressure adjustment stop cover.

[0011] The adjuster base is fixed to the sewing machine housing (the thread clamping screw is fixed to the sewing machine housing via the adjuster base). Under the elastic force of the thread clamping spring, two opposing thread clamping plates are pressed between the adjuster base and the pressure adjustment stop cover. The thread is clamped by the two thread clamping plates. During adjustment, the operator only needs to turn the adjusting knob. The adjusting knob moves axially on the thread clamping screw at the same time, and the compression of the thread clamping spring between the pressure adjustment stop cover and the adjusting knob changes. The mark ring on the adjusting knob corresponds to different positions of the scale line on the pressure adjustment stop cover, thereby determining the compression of the thread clamping spring and realizing the visual adjustment of the thread tension.

[0012] In the above-mentioned wire tension visual adjustment device, one end of the wire clamping screw is provided with a second notch, the pressure adjustment stop cover includes a squeezing part, the squeezing part is provided with a first through hole, a first limit strip is provided in the first through hole, the wire clamping screw passes through the first through hole, and the first limit strip is located at the second notch.

[0013] The limiting strip is located at the notch of the clamping screw, and this structure can effectively limit the rotation of the pressure regulating stop cover.

[0014] In the above-mentioned wire tension visual adjustment wire clamping regulator, a through hole two is provided in the middle of the wire clamping screw, and a wire loosening nail is inserted in the through hole two. One end of the wire loosening nail abuts against the limiting strip one, and the other end of the wire loosening nail extends out from the base of the regulator.

[0015] When the wire clamp adjuster is in the clamped state, the wire release pin is in the relaxed state. The adjusting knob presses the wire clamp spring against the pressure adjusting stop cover, and the pressure adjusting stop cover presses against the wire clamp plate, allowing the wire to pass between the two wire clamp plates.

[0016] When the wire clamp adjuster is in the loose state, the wire loosening pin is under force. The wire loosening pin passes through the through hole of the wire clamp screw and presses on the limit strip of the pressure adjustment stop cover. The wire loosening pin pushes the pressure adjustment stop cover, causing the pressure adjustment stop cover to press the wire clamp spring against the adjustment knob, and the two wire clamping plates are released.

[0017] In the above-mentioned wire tension visual adjustment device, a limiting strip two is provided on one end of the wire clamping spring, and the limiting strip two is located at the notch two.

[0018] The second limiting strip is located at the second notch of the wire clamping screw, and this structure can effectively limit the rotation of the wire clamping spring.

[0019] In the above-mentioned wire tension visual adjustment device, the protruding edge is located on the edge of the extrusion part, and the extrusion part and the protruding edge are integrally formed.

[0020] The pressure regulating stop cover, composed of an integrated extrusion section and a raised edge, has higher strength and is less prone to damage during use.

[0021] In the above-mentioned wire tension visual adjustment device, the extrusion part and the limiting strip are made of hard metal material, and the convex edge is made of plastic material.

[0022] The pressing part of the pressure regulating stop cover and the limiting strip are made of hard metal, which makes the structure stronger and prevents the limiting strip from being damaged when the loose pin presses on the limiting strip for a long time or when the loose pin impacts the limiting strip.

[0023] The raised edge of the pressure regulating stop cover is made of plastic and is connected to the extrusion part by injection molding. This structure reduces manufacturing costs and process difficulty.

[0024] In the above-mentioned wire tension visual adjustment device, a compression gear is sleeved on the wire clamping screw, and a drive tooth is provided on the adjustment knob. The drive tooth can mesh with the teeth on one side of the compression gear, and the other side of the compression gear can abut against the wire clamping spring.

[0025] The wire clamping screw passes through the compression gear and is threaded into the adjustment knob. This structure allows for better compression of the wire clamping spring through the compression gear.

[0026] This utility model also provides a sewing machine, which includes any of the above-mentioned thread tension adjusters.

[0027] Compared with the prior art, the advantages of this utility model are as follows:

[0028] 1. This wire tension adjuster uses a mechanical structure to adjust the wire tension, achieving visual adjustment of the wire tension at a low cost. It is convenient to adjust and has high work efficiency.

[0029] 2. The pressing part and the raised edge of the pressure regulating stop cover are integrated into one piece, which makes the structure stronger and less prone to damage during use. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the wire clamp adjuster;

[0031] Figure 2 This is a cross-sectional view of the wire clamp adjuster;

[0032] Figure 3 This is a schematic diagram of the adjustment knob;

[0033] Figure 4 This is a schematic diagram of the wire clamp screw;

[0034] Figure 5 This is a schematic diagram of the pressure regulating stop cover;

[0035] Figure 6 This is a schematic diagram of the wire clamp spring.

[0036] In the diagram: 1. Adjuster base, 2. Wire clamping screw, 3. Wire clamping plate, 4. Pressure regulating stop cover, 5. Wire clamping spring, 6. Adjustment knob, 7. Raised edge, 8. Notch 1, 9. Scale line, 10. Marking ring, 11. Notch 2, 12. Extrusion part, 13. Through hole 1, 14. Limiting strip 1, 15. Through hole 2, 16. Wire loosening pin, 17. Limiting strip 2, 18. Extrusion gear. Detailed Implementation

[0037] The following are specific embodiments of the present invention, and the technical solution of the present invention will be further described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0038] like Figure 1-3 As shown, this wire clamping adjuster includes an adjuster base 1, a wire clamping screw 2, two opposing wire clamping plates 3, a pressure regulating stop cover 4, a wire clamping spring 5, and an adjusting knob 6. One end of the wire clamping screw 2 is fixed to the adjuster base 1, and the other end of the wire clamping screw 2 passes through the wire clamping plate 3, the pressure regulating stop cover 4, and the wire clamping spring 5 in sequence and is threadedly connected to the adjusting knob 6. The wire clamping spring 5 is located between the pressure regulating stop cover 4 and the adjusting knob 6. The wire clamping spring 5 is in a compressed state and presses the two wire clamping plates 3 between the adjuster base 1 and the pressure regulating stop cover 4. The pressure regulating stop cover 4 has a raised edge 7, and a notch 8 on the raised edge 7. A scale line 9 is provided at the edge of the notch 8. A scale ring 10 that can be aligned with the scale line 9 is provided at the inner end of the adjusting knob 6.

[0039] The adjuster base 1 is fixed to the sewing machine housing. Under the elastic force of the wire clamping spring 5, the two opposing wire clamping plates 3 are pressed between the adjuster base 1 and the pressure adjustment stop cover 4. The thread is clamped by the two wire clamping plates 3. During adjustment, the operator only needs to turn the adjustment knob 6. The adjustment knob 6 moves axially on the wire clamping screw 2 at the same time. The compression of the wire clamping spring 5 between the pressure adjustment stop cover 4 and the adjustment knob 6 changes. The mark ring 10 on the adjustment knob 6 corresponds to different positions of the scale line 9 on the pressure adjustment stop cover 4, thereby determining the compression of the wire clamping spring 5 and realizing the visual adjustment of the thread tension.

[0040] In another embodiment, the thread tension adjuster may not include the adjuster base 1, and the thread tension screw 2 may be directly fixed to the sewing machine housing.

[0041] like Figure 4 and 5 As shown, in this embodiment, one end of the wire clamping screw 2 is provided with a notch 2 11, the pressure regulating stop cover 4 includes a pressing part 12, the pressing part 12 is provided with a through hole 13, a limit strip 14 is provided in the through hole 13, the wire clamping screw 2 passes through the through hole 13, and the limit strip 14 is located at the notch 2 11.

[0042] The limiting strip 14 is located at the notch 11 of the clamping screw 2. This structure can effectively limit the rotation of the pressure regulating stop cover 4.

[0043] like Figure 2 and 4 As shown, in this embodiment, the wire clamping screw 2 has a through hole 15 in the middle, and a wire loosening nail 16 is inserted through the through hole 15. One end of the wire loosening nail 16 abuts against the limiting strip 14, and the other end of the wire loosening nail 16 extends out from the adjuster base 1.

[0044] When the wire clamping adjuster is in the clamping state, the wire loosening pin 16 is in the loosening state. The adjusting knob 6 presses the wire clamping spring 5 against the pressure adjusting stop cover 4. The pressure adjusting stop cover 4 presses against the wire clamping plate 3, and the wire passes between the two wire clamping plates 3.

[0045] When the wire clamp adjuster is in the loose state, the wire loosening pin 16 is under force. The wire loosening pin 16 passes through the through hole 15 of the wire clamp screw 2 and presses on the limit strip 14 of the pressure regulating stop cover 4. The wire loosening pin 16 pushes the pressure regulating stop cover 4, causing the pressure regulating stop cover 4 to press the wire clamp spring 5 towards the adjusting knob 6, and the two wire clamping plates 3 are loosened.

[0046] like Figure 6 As shown, in this embodiment, a limiting strip 2 17 is provided on one end of the clamping spring 5, and the limiting strip 2 17 is located at the notch 2 11.

[0047] The limiting strip 17 is located at the notch 11 of the wire clamping screw 2, and this structure can effectively limit the rotation of the wire clamping spring 5.

[0048] As one embodiment, the protruding edge 7 is located on the edge of the extrusion part 12, and the extrusion part 12 and the protruding edge 7 are integrally formed.

[0049] The pressure regulating stop cover 4, which consists of the integrated extrusion part 12 and the raised edge 7, has higher strength and is less prone to damage during use.

[0050] In another embodiment, the extrusion part 12 and the limiting strip 14 are made of hard metal material, and the protruding edge 7 is made of plastic material.

[0051] The pressing part 12 and the limiting strip 14 of the pressure regulating stop cover 4 are made of hard metal, which makes the structure stronger and prevents the limiting strip 14 from being damaged when the loosening nail 16 presses the limiting strip 14 for a long time or when the loosening nail 16 impacts the limiting strip 14.

[0052] The raised edge 7 of the pressure regulating stop cover 4 is made of plastic. The raised edge 7 is connected to the extrusion part 12 by injection molding. This structure reduces manufacturing costs and process difficulty.

[0053] like Figure 2 As shown, in this embodiment, a pressing gear 18 is sleeved on the wire clamping screw 2, and a driving tooth is provided on the adjusting knob 6. The driving tooth can mesh with the teeth on one side of the pressing gear 18, and the other side of the pressing gear 18 can abut against the wire clamping spring 5.

[0054] The wire clamping screw 2 passes through the compression gear 18 and is threaded to the adjustment knob 6. This structure allows for better compression of the wire clamping spring 5 through the compression gear 18.

[0055] This utility model also provides a sewing machine, which includes any of the above-mentioned thread tension adjusters.

[0056] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A wire tension visual adjustment device, comprising a wire tension screw (2), two opposing wire tension plates (3), a pressure adjustment stop cover (4), a wire tension spring (5), and an adjustment knob (6), wherein one end of the wire tension screw (2) passes sequentially through the wire tension plates (3), the pressure adjustment stop cover (4), and the wire tension spring (5) and is threadedly connected to the adjustment knob (6), and the wire tension spring (5) is located between the pressure adjustment stop cover (4) and the adjustment knob (6), characterized in that, The pressure regulating stop cover (4) has a raised edge (7), a notch (8) on the raised edge (7), a scale line (9) at the edge of the notch (8), and a scale ring (10) that can be opposite to the scale line (9) is provided at the inner end of the adjusting knob (6).

2. The wire tension visual adjustment device according to claim 1, characterized in that, The wire clamping adjuster also includes an adjuster base (1), one end of the wire clamping screw (2) is fixed on the adjuster base (1), and the wire clamping spring (5) is in a compressed state and presses the two wire clamping plates (3) between the adjuster base (1) and the pressure regulating stop cover (4).

3. A wire tension visual adjustment device according to claim 1 or 2, characterized in that, One end of the wire clamping screw (2) has a notch two (11). The pressure regulating stop cover (4) includes a pressing part (12). The pressing part (12) has a through hole one (13). A limit strip one (14) is provided in the through hole one (13). The wire clamping screw (2) passes through the through hole one (13). The limit strip one (14) is located at the notch two (11).

4. A wire tension visual adjustment device according to claim 3, characterized in that, The wire clamping screw (2) has a through hole two (15) in the middle, and a wire loosening nail (16) is inserted in the through hole two (15). One end of the wire loosening nail (16) abuts against the limiting strip one (14), and the other end of the wire loosening nail (16) extends out from the adjuster base (1).

5. A wire tension visual adjustment device according to claim 3, characterized in that, A limiting strip (17) is provided on one end of the clamping spring (5), and the limiting strip (17) is located at the notch (11).

6. A wire tension visual adjustment device according to claim 3, characterized in that, The protruding edge (7) is located on the edge of the extrusion part (12), and the extrusion part (12) and the protruding edge (7) are integrally formed.

7. A wire tension visual adjustment device according to claim 3, characterized in that, The extrusion part (12) and the limiting strip (14) are made of hard metal material, and the protruding edge (7) is made of plastic material.

8. A wire tension visual adjustment device according to claim 1 or 2, characterized in that, The clamping screw (2) is fitted with a pressing gear (18), and the adjusting knob (6) has a driving tooth. The driving tooth can mesh with the teeth on one side of the pressing gear (18), and the other side of the pressing gear (18) can abut against the clamping spring (5).

9. A sewing machine, characterized in that, The sewing machine includes a thread tension adjuster as described in any one of claims 1-8.

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