Tension adjusting assembly for lockstitch sewing machine

Abstract

The utility model relates to the technical field of lockstitch sewing machines, and discloses a tension adjusting assembly for a lockstitch sewing machine, which comprises an operating table, a sewing machine body is fixedly connected to the top of the operating table, a fixing plate is fixedly connected to the top end of the sewing machine body, and an adjusting plate is slidably connected to the top of the operating table. An adjusting block is fixedly connected to the top of the adjusting plate, a control plate is slidably connected to the interior of the adjusting block, an adjusting groove is formed in the front end of the control plate, and a pressing plate is fixedly connected to one side of the control plate. According to the tension adjusting assembly for the lockstitch sewing machine, a worker pushes a control block towards the outside of an adjusting groove, the control block drives an inserting block to relieve limiting between the inserting block and an inserting groove and moves a control plate downwards, the control plate drives an adjusting plate to press cloth needing to be operated, and the worker moves the position of the adjusting plate so that the cloth can be tensioned and unfolded; and the control panel is fixed, so that the effect of adjusting the tension is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of lockstitch sewing machines, in particular to a tension adjustment component for lockstitch sewing machines. Background Art

[0002] A flat-bottom sewing machine is a machine that uses a sewing thread to form a seam on the material to interweave or sew one or more layers of material together. It is usually used for thin materials and thick materials. The flat-bottom sewing machine can sew cotton, linen, silk, wool, artificial fiber and other fabrics and leather, plastic, paper and other products. Thin materials are generally used for knitwear, underwear, shirts, uniforms, etc. Thick materials are generally used for various sportswear, jeans, fashion, coats, shoes and hats, leather, bags, etc. The flat-bottom sewing machine is the most basic type of sewing equipment. It is the simplest seam in sewing. The seams it sews are neat, beautiful, uniform, flat and firm, with fast sewing speed, easy operation and simple to understand.

[0003] A Chinese patent discloses a flat-bed sewing machine (authorization announcement number CN201873846U). This patented technology not only avoids the damage of sewing thread to the hands, but also overcomes the disadvantage of uneven lengths of residual thread ends, thereby improving productivity and saving sewing thread.

[0004] In view of the above-mentioned and existing related technologies, the inventors believe that the following defects often exist: the existing tension adjustment components usually do not have sufficient flexibility and adaptability, and it is difficult to cope with the different tension requirements of fabrics of different materials, thicknesses and elasticity. During the sewing process, if the tension of the fabric cannot be accurately adjusted, it often leads to uneven stitches, wrinkled fabrics or broken stitches, which seriously affect the sewing quality and efficiency. Utility Model Content

[0005] The technical problem to be solved by the present invention is that the existing technology has the disadvantage of being unable to adjust the tension. For this reason, we propose a tension adjustment component for a lockstitch sewing machine.

[0006] In order to achieve the above-mentioned purpose, the present application adopts the following technical solution: a tension adjustment assembly for a flat sewing machine, comprising an operating table, the top of the operating table is fixedly connected to a sewing machine body, the top of the sewing machine body is fixedly connected to a fixed plate, the top of the operating table is slidably connected to an adjustment plate, the top of the adjustment plate is fixedly connected to an adjustment block, the inside of the adjustment block is slidably connected to a control plate, the front end of the control plate is provided with an adjustment slot, one side of the control plate is fixedly connected to a pressure plate, the inside of the adjustment slot is slidably connected to a control block, one side of the inside of the adjustment block is provided with a straight slot, the inside of the adjustment slot close to the straight slot is fixedly connected to a through slot, the side of the control block close to the through slot is fixedly connected to an insertion block, and the inside of the straight slot is provided with a slot.

[0007] Preferably, a force storage spring is fixedly connected to the top of the control plate, and the top of the force storage spring is fixedly connected to the top of the inside of the adjustment block.

[0008] Preferably, both ends of the adjusting groove are provided with sliding grooves, both ends of the control block are fixedly connected with sliders, and the surfaces of the sliders are slidably connected to the inside of the sliding grooves.

[0009] Preferably, a guide groove is provided inside the fixing plate, and guide blocks are fixedly connected to both ends of the adjustment plate, and the surface of the guide block is slidably connected to the inside of the guide groove.

[0010] Preferably, the size of the insert block is adapted to the size of the slot, and the surface of the insert block is slidably connected to the interior of the slot.

[0011] Preferably, a fixing groove is provided at the front end of the adjustment plate, a plug-in block is slidably connected inside the fixing groove, a return spring is fixedly connected to the rear end of the fixing groove, the front end of the return spring is fixedly connected to the rear end of the plug-in block, and a plurality of plug-in grooves are provided at the front end of the fixing plate.

[0012] Preferably, limiting grooves are provided on both sides of the interior of the fixing groove, limiting blocks are fixedly connected to both sides of the insertion block, and the surfaces of the limiting blocks are slidably connected to the interior of the limiting grooves.

[0013] The technical effects and advantages of this utility model are:

[0014] In the utility model, the staff pushes the control block toward the outside of the adjusting slot, and the control block drives the insert block to release the limit between the insert block and the slot, and moves the control plate downward. The control plate drives the adjusting plate to press the cloth that needs to be operated. The staff moves the position of the adjusting plate to stretch the cloth and fix the control plate. Through this setting, the tension can be adjusted. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0016] Figure 2 It is a partial cross-sectional structural schematic diagram of the utility model;

[0017] Figure 3 This is a schematic diagram of a partial cross-sectional structure of the regulating block of the present utility model;

[0018] Figure 4 This is a partial cross-sectional structural diagram of the fixing plate of the present invention;

[0019] Figure 5 This is a schematic diagram of the internal structure of the fixing groove of the present utility model.

[0020] Legend: 1. Operating table; 2. Sewing machine body; 3. Fixed plate; 4. Adjusting plate; 5. Adjusting block; 6. Adjusting slot; 7. Control block; 8. Storage spring; 9. Through slot; 10. Insertion block; 11. Straight slot; 12. Slot; 13. Control plate; 14. Slide; 15. Slider; 16. Guide slot; 17. Guide block; 18. Fixed slot; 19. Insertion block; 20. Insertion slot; 21. Return spring; 22. Limiting slot; 23. Limiting block; 24. Pressing plate. DETAILED DESCRIPTION

[0021] The present invention will now be described in further detail with reference to the accompanying drawings and preferred embodiments. These drawings are simplified schematic diagrams that only illustrate the basic structure of the present invention in a schematic manner, and therefore only show components related to the present invention.

[0022] Reference Figure 1 - Figure 5 As shown, the utility model provides a technical solution: a tension adjustment component for a lockstitch sewing machine, comprising an operating table 1, the top of the operating table 1 is fixedly connected to a sewing machine body 2, the top of the sewing machine body 2 is fixedly connected to a fixed plate 3, the top of the operating table 1 is slidably connected to an adjustment plate 4, the top of the adjustment plate 4 is fixedly connected to an adjustment block 5, the interior of the adjustment block 5 is slidably connected to a control plate 13, the front end of the control plate 13 is provided with an adjustment slot 6, one side of the control plate 13 is fixedly connected to a pressing plate 24, the interior of the adjustment slot 6 is slidably connected to a control block 7, one side of the interior of the adjustment block 5 is provided with a straight slot 11, and the adjustment A through slot 9 is fixedly connected to one side of the slot 6 near the straight slot 11, and an insert block 10 is fixedly connected to one side of the control block 7 near the through slot 9. A slot 12 is provided inside the straight slot 11. The staff pushes the control block 7 toward the outside of the adjustment slot 6. The control block 7 drives the insert block 10 to release the limit between it and the slot 12, and moves the control plate 13 downward. The control plate 13 drives the adjustment plate 4 to press the fabric that needs to be operated. The staff moves the position of the adjustment plate 4 to stretch the fabric and fix the control plate 13. Through this setting, the tension can be adjusted.

[0023] Reference Figure 2 and Figure 3 As shown, in this embodiment: the top of the control plate 13 is fixedly connected to the force storage spring 8, and the top of the force storage spring 8 is fixedly connected to the top of the inside of the adjustment block 5. When the staff moves the control plate 13 upward, the control plate 13 squeezes the force storage spring 8 to compress and store force. When the staff releases the limit of the control plate 13, the control plate 13 is quickly moved downward under the action of the rebound force of the force storage spring 8, and drives the pressure plate 24 to press the fabric.

[0024] Reference Figure 2As shown, in this embodiment: both ends of the adjustment groove 6 are provided with a slide groove 14, and both ends of the control block 7 are fixedly connected with a slider 15, and the surface of the slider 15 is slidably connected to the inside of the slide groove 14. When the staff moves the control block 7, the control block 7 drives the slider 15 to slide inside the slide groove 14. Through the above arrangement, precise control of the position of the control block 7 is achieved to reduce wear and energy loss during the sliding process, prevent external dust and impurities from entering, ensure the cleanliness and lubrication of the internal mechanical structure, and extend the service life of the equipment.

[0025] Reference Figure 4 As shown, in this embodiment: a guide groove 16 is opened inside the fixed plate 3, and guide blocks 17 are fixedly connected to both ends of the adjustment plate 4. The surface of the guide block 17 is slidably connected to the inside of the guide groove 16. When the staff moves the adjustment plate 4, the adjustment plate 4 drives the guide block 17 to slide inside the guide groove 16. Through the above arrangement, the sliding fit design between the guide block 17 and the guide groove 16 ensures the smoothness of the movement, reduces friction, ensures the accuracy of its movement trajectory, and avoids equipment damage caused by offset.

[0026] Reference Figure 2 As shown, in this embodiment: the size of the plug block 10 is adapted to the size of the slot 12, and the surface of the plug block 10 is slidably connected to the interior of the slot 12. By setting the size of the plug block 10 to be adapted to the size of the slot 12, the smooth movement of the component plug block 10 in the component slot 12 is ensured, thereby improving the operating efficiency of the entire device. In addition, this design allows the component plug block 10 to remain stable when subjected to external forces, reducing wear and tear and extending the service life of the equipment.

[0027] Reference Figure 5 As shown, in this embodiment: a fixing groove 18 is provided at the front end of the adjusting plate 4, and an insertion block 19 is slidably connected inside the fixing groove 18, and a return spring 21 is fixedly connected to the rear end of the fixing groove 18, and the front end of the return spring 21 is fixedly connected to the rear end of the insertion block 19. A plurality of insertion grooves 20 are provided at the front end of the fixing plate 3, and the staff pushes the insertion block 19 into the inside of the fixing groove 18, and the insertion block 19 squeezes the return spring 21 to compress and accumulate force, and at the same time releases the limit between the insertion block 19 and the insertion groove 20, so that the staff can adjust the position of the adjusting plate 4 according to the fabric and fix it during operation.

[0028] Reference Figure 5As shown, in this embodiment: limiting grooves 22 are opened on both sides of the interior of the fixed groove 18, and limiting blocks 23 are fixedly connected on both sides of the insertion block 19. The surface of the limiting block 23 is slidably connected to the interior of the limiting groove 22. When the staff moves the insertion block 19, the insertion block 19 drives the limiting block 23 to slide inside the limiting groove 22. Through the above arrangement, precise control of the position of the insertion block 19 is achieved. In addition, the sliding friction of the limiting block 23 is small, which ensures the smooth movement of the insertion block 19, reduces the resistance during operation, and can limit the moving range of the insertion block 19 to prevent it from exceeding the predetermined working area.

[0029] Working principle:

[0030] Step 1: Release the limit and make preliminary adjustments

[0031] In this step, the staff first pushes the control block 7 to the outside of the adjustment slot 6. This action is the key first step because it triggers the start of the entire adjustment mechanism. When the control block 7 is pushed, it will link the plug block 10 below it to pull it out from the slot 12 originally inserted, thereby releasing the limit relationship between the plug block 10 and the slot 12. This limit-releasing operation is the prerequisite for the subsequent free adjustment of the fabric tension. At the same time, as the control block 7 is pushed, the control plate 13 begins to move downward. The downward movement of the control plate 13 is the direct start of adjusting the fabric tension, preparing for the subsequent pressing operation.

[0032] Step 2: Press the fabric and adjust the position

[0033] As the control plate 13 continues to move downward, it further drives the adjustment plate 4 to press the cloth that needs to be worked on. This pressing action ensures that the cloth can maintain a stable position during the subsequent tension adjustment process to prevent the cloth from sliding or shifting due to tension changes. Once the cloth is effectively pressed, the staff can move the position of the adjustment plate 4 manually or through other auxiliary tools according to actual needs. This position adjustment is to accurately stretch and tighten the cloth to meet specific process requirements. The movement of the adjustment plate 4 will accordingly change the tension on the cloth, which is a key step in achieving tension adjustment.

[0034] Step 3: Fix the control board 13 and complete the tension adjustment

[0035] After completing the stretching and tensioning of the fabric, the staff needs to fix the current state to ensure the durability and stability of the tension adjustment. This step usually involves fixing the control board 13. The staff fixes the control board 13 in the current position, thereby indirectly fixing the tension on the adjustment board 4 and the fabric. This fixing operation not only ensures the stability of the current tension state, but also provides reliable protection for subsequent processing operations. At this point, the entire tension adjustment process is completed, the fabric is stably stretched and tensioned, and is ready for the next step of processing.

[0036] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A tension adjustment assembly for a lockstitch sewing machine, comprising an operating table (1), characterized in that: The top of the operating table (1) is fixedly connected to the sewing machine body (2), the top of the sewing machine body (2) is fixedly connected to the fixing plate (3), the top of the operating table (1) is slidably connected to the adjusting plate (4), the top of the adjusting plate (4) is fixedly connected to the adjusting block (5), the inside of the adjusting block (5) is slidably connected to the control plate (13), the front end of the control plate (13) is provided with an adjusting slot (6), one side of the control plate (13) is fixedly connected to a pressing plate (24), the inside of the adjusting slot (6) is slidably connected to the control block (7), one side of the inside of the adjusting block (5) is provided with a straight slot (11), the inside of the adjusting slot (6) is fixedly connected to a through slot (9), the side of the control block (7) close to the through slot (9) is fixedly connected to an inserting block (10), and the inside of the straight slot (11) is provided with a slot (12).

2. The tension adjustment assembly for a lockstitch sewing machine according to claim 1, characterized in that: The top end of the control plate (13) is fixedly connected to a force storage spring (8), and the top end of the force storage spring (8) is fixedly connected to the top end inside the adjustment block (5).

3. The tension adjustment assembly for a lockstitch sewing machine according to claim 1, characterized in that: Both ends of the regulating groove (6) are provided with sliding grooves (14), and both ends of the control block (7) are fixedly connected with sliders (15), and the surface of the slider (15) is slidably connected with the inside of the sliding groove (14).

4. The tension adjustment assembly for a lockstitch sewing machine according to claim 1, characterized in that: A guide groove (16) is provided inside the fixed plate (3), and guide blocks (17) are fixedly connected to both ends of the adjustment plate (4), and the surface of the guide block (17) is slidably connected to the inside of the guide groove (16).

5. The tension adjustment assembly for a lockstitch sewing machine according to claim 1, characterized in that: The size of the insert block (10) is adapted to the size of the slot (12), and the surface of the insert block (10) is slidably connected to the interior of the slot (12).

6. The tension adjustment assembly for a lockstitch sewing machine according to claim 1, characterized in that: The front end of the adjustment plate (4) is provided with a fixing groove (18), the interior of the fixing groove (18) is slidably connected to an insertion block (19), the rear end of the interior of the fixing groove (18) is fixedly connected to a return spring (21), the front end of the return spring (21) is fixedly connected to the rear end of the insertion block (19), and the front end of the fixing plate (3) is provided with a plurality of insertion grooves (20).

7. The tension adjustment assembly for a lockstitch sewing machine according to claim 6, characterized in that: Limiting grooves (22) are provided on both sides of the interior of the fixing groove (18), and limiting blocks (23) are fixedly connected to both sides of the insertion block (19), and the surface of the limiting block (23) is slidably connected to the interior of the limiting groove (22).

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