A needle holder adjustment device for a bag sewing machine

Abstract

This utility model provides a needle holder adjustment device for a bag sewing machine, relating to the field of bag sewing machine technology. It includes a bag sewing machine body, with a needle holder compartment on one side of the body. Feeding teeth are movably connected to the inner wall of the needle holder compartment, and a support plate is fixedly connected to the bottom of the feeding teeth. A fixing plate is engaged with the outer surface of the support plate. This utility model, by setting a first movable groove, ensures sufficient space for the support rod to rotate without obstruction. By setting a limiting rod, the top support groove of the support rod is locked in this position, preventing it from disengaging from the circular groove due to rotation. The engagement connection between the circular groove and the top of the support rod allows for smoother rotation. With these features, adjustment is easier and less strenuous than loosening particularly tight bolts.

Description

Technical Field

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

[0002] A bag sewing machine is a device designed for sewing the openings of plastic woven bags, paper bags, paper-plastic composite bags, aluminum-coated paper bags, etc. Based on usage, they are categorized into tabletop bag sewing machines, handheld bag sewing machines, and vertical bag sewing machines. Handheld bag sewing machines complete the sewing process through the mechanical cooperation between the needle and needle holder. However, when adjusting the feed teeth of existing handheld bag sewing machines, it is necessary to loosen the fastening screws and manually push the connection at the lower end of the feed teeth to adjust the height. This operation is relatively laborious, and the adjustment force is not easy to control. Summary of the Invention

[0003] The purpose of this invention is to address the shortcomings of existing technologies, such as the laborious operation process and the difficulty in controlling the adjustment force, and to provide a needle holder adjustment device for a sewing machine.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a needle holder adjustment device for a bag sewing machine, comprising a bag sewing machine body, a needle holder compartment provided on one side of the bag sewing machine body, a feeding tooth movably connected to the inner wall of the needle holder compartment, a support plate fixedly connected to the bottom of the feeding tooth, a fixing plate engaged with the outer surface of the support plate, a driven rod fixedly connected to one side of the fixing plate, a first movable groove opened on one side of the support plate, a limit rod fixedly connected to the inner wall of the first movable groove, a circular groove opened on one side of the limit rod, a baffle fixedly connected to the inner wall of the fixing plate, a support shaft fixedly connected to the top of the driven rod, a rotating column rotatably connected to the inner wall of the support shaft, and a rotating plate fixedly connected to the top of the rotating column.

[0005] In a preferred embodiment, a movable groove is provided on one side of the fixed plate, a locking groove is provided on one side of the movable groove, and limiting grooves are provided on both sides of the rotating plate. A limiting plate is engaged with the inner wall of the limiting groove, a support base is fixedly connected to the top of the limiting plate, a sliding groove is provided through the outer surface of the support base, a support frame is fixedly connected to the inner wall of the sliding groove, a locking block is movably connected to the inner wall of the sliding groove, a connecting rod is fixedly connected to one side of the locking block, a spring is movably connected to the outer surface of the connecting rod, and a handle is fixedly connected to the top of the connecting rod.

[0006] In a preferred embodiment, the two ends of the spring are fixedly connected to the outer surfaces of the locking block and the support frame, respectively, and the inner wall of the locking groove is engaged with the outer surface of the locking block.

[0007] In a preferred embodiment, the top of the driven rod is rotatably connected to a linkage rod, and the top of the linkage rod is rotatably connected to a drive shaft.

[0008] In a preferred embodiment, the inner wall of the circular groove is engaged and movably connected to the top of the support rod, and the bottom of the baffle is engaged and connected to the outer surface of the support plate.

[0009] In a preferred embodiment, a second movable groove is provided on one side of the support shaft, and the second movable groove is formed on the outer surface of the fixed plate.

[0010] In a preferred embodiment, a support rod is fixedly connected to the outer surface of the rotating plate, and a support groove is provided at the top of the support rod.

[0011] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0012] This invention provides sufficient space for the support rod to rotate without obstruction by setting a first movable groove. A limiting rod ensures the top support groove of the support rod is engaged here, preventing it from disengaging from the circular groove during rotation. The engagement between the circular groove and the top of the support rod allows for smoother rotation. To facilitate rotation and simultaneously move the support plate and its upper part up and down, a rotating plate is fixedly connected to the upper end of the rotating column. Since the height adjustment distance of the feeding teeth is small, the length of the support groove ensures continuous contact with the circular groove throughout the rotation process. These features eliminate the need to loosen particularly tight bolts for adjustment, making adjustment more effortless and convenient. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of a needle holder adjustment device for a sewing machine provided by this utility model.

[0014] Figure 2 This utility model provides a schematic diagram of the internal structure of the needle holder chamber of a sewing machine needle holder adjustment device.

[0015] Figure 3 This is a schematic diagram of the support plate portion of a needle holder adjustment device for a sewing machine provided by this utility model.

[0016] Figure 4 This is a schematic diagram of the fixed plate portion of a needle holder adjustment device for a sewing machine provided by this utility model.

[0017] Figure 5 This is a schematic diagram of the support rod portion of a needle holder adjustment device for a sewing machine provided by this utility model.

[0018] Legend:

[0019] 1. Sewing machine body; 2. Needle holder; 3. Feed teeth; 4. Support plate; 5. Fixing plate; 6. Driven rod; 7. Linkage rod; 8. Drive shaft; 9. First movable groove; 10. Limiting rod; 11. Circular groove; 12. Baffle; 13. Moving groove; 14. Support shaft; 15. Slot; 16. Second movable groove; 17. Rotating column; 18. Limiting groove; 19. Support rod; 20. Support groove; 21. Limiting plate; 22. Support base; 23. Slide groove; 24. Support frame; 25. Locking block; 26. Connecting rod; 27. Spring; 28. Handle. Detailed Implementation

[0020] 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. Example 1

[0021] like Figures 1-5 As shown, this utility model provides a technical solution: a needle holder adjustment device for a bag sewing machine, including a bag sewing machine body 1, a needle holder chamber 2 provided on one side of the bag sewing machine body 1, a feeding tooth 3 movably connected to the inner wall of the needle holder chamber 2, a support plate 4 fixedly connected to the bottom of the feeding tooth 3, a fixing plate 5 engaged with the outer surface of the support plate 4, a driven rod 6 fixedly connected to one side of the fixing plate 5, a linkage rod 7 rotatably connected to the top of the driven rod 6, a drive shaft 8 rotatably connected to the top of the linkage rod 7, a first movable groove 9 opened on one side of the support plate 4, a limit rod 10 fixedly connected to the inner wall of the first movable groove 9, and the limit rod... A circular groove 11 is provided on one side of the 10. The inner wall of the circular groove 11 is engaged and movably connected to the top of the support rod 19. The bottom of the baffle 12 is engaged and connected to the outer surface of the support plate 4. The baffle 12 is fixedly connected to the inner wall of the fixed plate 5. The support shaft 14 is fixedly connected to the top of the driven rod 6. A second movable groove 16 is provided on one side of the support shaft 14. The second movable groove 16 is opened on the outer surface of the fixed plate 5. A rotating column 17 is rotatably connected to the inner wall of the support shaft 14. A rotating plate is fixedly connected to the top of the rotating column 17. The support rod 19 is fixedly connected to the outer surface of the rotating plate. A support groove 20 is provided at the top of the support rod 19.

[0022] In this embodiment, the first movable groove 9 provides sufficient space for the support rod 19 to rotate without obstruction. A limiting rod 10 secures the top support groove 20 of the support rod 19, preventing it from disengaging from the circular groove 11 during rotation. The circular groove 11 and the top of the support rod 19 are engaged, allowing for smoother rotation. A baffle 12 secures the support plate 4 within the inner wall of the fixed plate 5. A support shaft 14 is used to fix and support the rotating column 17 for rotation. The structure drives the rotation and simultaneously moves the support plate 4 and its upper part up and down. The rotating plate is fixedly connected to the upper end of the rotating column 17. At one end of the rotating plate, a support rod 19 is set to rotate inside the first movable groove 9 and the second movable groove 16. The other end is set with a rotating handle. When the handle is rotated, the top end of the support rod 19 is restricted to move in the circular groove 11 by the aforementioned limiting rod 10, so that the support plate 4 is pushed by the support rod 19. Since the height adjustment distance of the feeding tooth 3 is small, the length of the support groove 20 can contact the circular groove 11 throughout the rotation process. Example 2

[0023] like Figures 4-5 As shown, a movable groove 13 is provided on one side of the fixed plate 5, and a slot 15 is provided on one side of the movable groove 13. Limiting grooves 18 are provided on both sides of the rotating plate. A limiting plate 21 is engaged with the inner wall of the limiting groove 18. A support base 22 is fixedly connected to the top of the limiting plate 21. A sliding groove 23 is provided through the outer surface of the support base 22. A support frame 24 is fixedly connected to the inner wall of the sliding groove 23. A locking block 25 is movably connected to the inner wall of the sliding groove 23. A connecting rod 26 is fixedly connected to one side of the locking block 25. A spring 27 is movably connected to the outer surface of the connecting rod 26. A handle 28 is fixedly connected to the top of the connecting rod 26. The two ends of the spring 27 are fixedly connected to the outer surfaces of the locking block 25 and the support frame 24, respectively. The inner wall of the slot 15 is engaged with the outer surface of the locking block 25.

[0024] In this embodiment, after the rotating column 17 is rotated to a suitable position, a limiting groove 18 and a moving groove 13 are set to fix the height of the support plate 4 for installing the limiting plate 21. Through the sliding groove 23, the support frame 24 and the spring 27, the locking block 25 can be moved back and forth by pulling the handle 28 to fix the limiting plate 21.

[0025] Working principle:

[0026] like Figures 1-5As shown, when the height of the feeding tooth 3 needs to be adjusted, pull the handle 28 to disengage the locking block 25 from the slot 15. At the same time, the spring 27 retracts inside the support frame 24, and the connecting rod 26 extends out of the slide groove 23. Then lift the limiting plate 21 to disengage from the limiting groove 18. Then, hold the handle and rotate the rotating plate and the support rod 19 to rotate in the center of the support shaft 14. The support groove 20 opened at the top of the support rod 19 is locked on the outer surface of the limiting rod 10. At the same time, move the support plate 4 slightly upward or slightly downward. After adjustment, lock the limiting plate 21 inside the limiting groove 18.

[0027] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A needle holder adjusting device for a bag sewing machine, comprising a bag sewing machine body (1), characterized in that: The sewing machine body (1) has a needle holder (2) on one side. The inner wall of the needle holder (2) is movably connected to a feeding tooth (3). The bottom of the feeding tooth (3) is fixedly connected to a support plate (4). The outer surface of the support plate (4) is engaged with a fixing plate (5). A driven rod (6) is fixedly connected to one side of the fixing plate (5). A first movable groove (9) is opened on one side of the support plate (4). A limit rod (10) is fixedly connected to the inner wall of the first movable groove (9). A circular groove (11) is opened on one side of the limit rod (10). A baffle (12) is fixedly connected to the inner wall of the fixing plate (5). A support shaft (14) is fixedly connected to the top of the driven rod (6). A rotating column (17) is rotatably connected to the inner wall of the support shaft (14). A rotating plate is fixedly connected to the top of the rotating column (17).

2. The needle holder adjustment device for a sewing machine according to claim 1, characterized in that: A movable groove (13) is provided on one side of the fixed plate (5), and a slot (15) is provided on one side of the movable groove (13). Limiting grooves (18) are provided on both sides of the rotating plate. A limiting plate (21) is engaged with the inner wall of the limiting groove (18). A support base (22) is fixedly connected to the top of the limiting plate (21). A sliding groove (23) is provided through the outer surface of the support base (22). A support frame (24) is fixedly connected to the inner wall of the sliding groove (23). A locking block (25) is movably connected to the inner wall of the sliding groove (23). A connecting rod (26) is fixedly connected to one side of the locking block (25). A spring (27) is movably connected to the outer surface of the connecting rod (26). A handle (28) is fixedly connected to the top of the connecting rod (26).

3. A needle holder adjustment device for a bag sewing machine according to claim 2, characterized in that: The two ends of the spring (27) are fixedly connected to the outer surfaces of the card block (25) and the support frame (24) respectively, and the inner wall of the card slot (15) is engaged with the outer surface of the card block (25).

4. A needle holder adjustment device for a bag sewing machine according to claim 1, characterized in that: The top of the driven rod (6) is rotatably connected to a linkage rod (7), and the top of the linkage rod (7) is rotatably connected to a drive shaft (8).

5. A needle holder adjustment device for a bag sewing machine according to claim 1, characterized in that: The inner wall of the circular groove (11) is engaged and movably connected to the top of the support rod (19), and the bottom of the baffle (12) is engaged and connected to the outer surface of the support plate (4).

6. A needle holder adjustment device for a bag sewing machine according to claim 1, characterized in that: A second movable groove (16) is provided on one side of the support shaft (14), and the second movable groove (16) is provided on the outer surface of the fixing plate (5).

7. A needle holder adjustment device for a bag sewing machine according to claim 1, characterized in that: A support rod (19) is fixedly connected to the outer surface of the rotating plate, and a support groove (20) is provided on the top of the support rod (19).

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