Quick thread changing mechanism of sewing machine

Abstract

The utility model relates to the technical field of sewing machinery, and discloses a quick thread changing mechanism of a sewing machine, which comprises a sewing machine, the sewing machine is composed of a table top, a machine head and a rack, the table top is used as an installation carrier of a storage assembly, and the machine head is used as an installation carrier of a bobbin, a thread changing assembly and a thread arranging assembly; and the line changing assembly is used for conducting line changing operation on the line barrel. By arranging the wire changing assembly, wire changing operation can be conveniently carried out on the bobbin in advance, the phenomenon of wire breakage or equipment shutdown caused by complete use of the bobbin is avoided, the wire changing operation is converted from passive interruption post-processing to active early warning post-preparation, the efficiency of wire changing of the bobbin is improved, quick wire changing operation on the bobbin is further achieved, the shutdown time is shortened, and the production efficiency is improved. And the production efficiency is improved, the practicability of the equipment is further improved, and actual application and operation are facilitated.

Description

Technical Field

[0001] This utility model relates to the field of sewing machinery technology, and more specifically to a quick thread changing mechanism for a sewing machine. Background Technology

[0002] A sewing machine is a machine that uses one or more sewing threads to create one or more stitches on fabric, so that one or more layers of fabric are interwoven or sewn together.

[0003] The shortcomings of existing technology are as follows: In existing equipment, the spool is placed on the thread dropper during operation. When the sewing machine is working, the thread on the spool is pulled. As the amount of thread remaining on the spool gradually decreases, due to the low weight of the spool, it will fall off the thread dropper. The operator needs to place the spool back on the thread dropper. During this process, the sewing machine stops working, reducing work efficiency and further reducing the practicality of the equipment, which is not conducive to actual application and operation. Utility Model Content

[0004] In order to overcome the above-mentioned defects of the prior art, the present invention provides a quick thread changing mechanism for sewing machines to solve the problems existing in the background art.

[0005] This utility model provides the following technical solution: a quick thread changing mechanism for a sewing machine, comprising:

[0006] A sewing machine comprising a table, a sewing head, and a frame, wherein the table serves as a mounting carrier for storage components, and the sewing head serves as a mounting carrier for a thread spool, a thread changing component, and a thread organizing component;

[0007] A wire changing assembly is used to change the wire in a wire spool.

[0008] The switching assembly includes:

[0009] A cylinder, mounted on top of the machine head;

[0010] A circular plate, which is slidably fitted with a cylindrical plate;

[0011] The first preload springs are all installed between the inner wall of the circular plate and the cylinder;

[0012] A wire-dropping shaft, which is rotatably engaged with a circular plate;

[0013] An L-shaped plate rotates on top of the machine head, and the L-shaped plate is located on one side of the cylinder;

[0014] A threaded rod, which engages with an L-shaped plate via a threaded connection;

[0015] A pressure plate, which is rotatably engaged with a threaded rod, and the circular groove on the pressure plate is fitted onto the drop shaft;

[0016] The gravity sensors are all installed at the bottom of the pressure plate, and the two gravity sensors abut against the top of the bobbin.

[0017] Preferably, the line-changing assembly further includes:

[0018] The limiting grooves are all opened on both sides of the inner wall of the cylinder;

[0019] The limiting block is slidably engaged with the limiting groove, and the two limiting blocks are fixedly connected to both sides of the circular plate.

[0020] Preferably, it further includes a friction-reducing component disposed on the line-changing assembly, the friction-reducing component comprising:

[0021] An annular groove is formed at the bottom of the limiting block, and the annular groove is located between the two gravity sensors;

[0022] An annular block, which is slidably fitted with an annular groove;

[0023] An annular plate is installed at the bottom of the annular block, and the annular plate is in contact with the top of the spool.

[0024] Preferably, the cable management assembly includes:

[0025] A U-shaped frame is installed on top of the machine head, and the U-shaped frame is located on the side of the cylinder away from the L-shaped plate;

[0026] The sliding rod is installed between the inner sides of the U-shaped frame;

[0027] A slider, wherein the slider is slidably engaged with a slide rod, and one side of the slider is slidably engaged with the inner side of the U-shaped frame;

[0028] A wire loop is installed on the side of the slider away from the U-shaped frame;

[0029] The second preload spring is sleeved on the slide rod, and the second preload spring is located between the slider and the inner side of the U-shaped frame.

[0030] Preferably, the storage component includes:

[0031] Storage box;

[0032] The slides are all located at the bottom of the countertop;

[0033] The slide rails are all installed on the top of the storage box, and the slide rails and the slide grooves cooperate with each other.

[0034] Preferably, an alarm is provided on the top of the L-shaped plate, and the gravity sensor is electrically connected to the alarm.

[0035] The beneficial effects of this utility model are:

[0036] 1. In this utility model, by setting up a line-changing component, it is convenient to perform line-changing operations on the spool in advance, avoiding the phenomenon of line breakage or equipment shutdown caused by the spool being completely used up. This transforms the line-changing operation from passive post-interruption processing to active pre-warning preparation, improving the efficiency of spool line changing, further realizing rapid spool line changing operations, shortening downtime, improving production efficiency, and further enhancing the practicality of the equipment, which is beneficial to practical application and operation.

[0037] 2. In this utility model, by setting a friction-reducing component, the friction between the spool and the pressure plate can be reduced, thereby increasing the rotational speed of the spool; by setting a wire-sorting component, the wire on the spool can be sorted automatically to prevent tangling. Attached Figure Description

[0038] Figure 1 This is a schematic diagram of the sewing machine structure of this utility model.

[0039] Figure 2 This is a schematic diagram of the wire changing assembly, wire management assembly, and friction reduction assembly on the head of this utility model.

[0040] Figure 3 For the present utility model Figure 2 Enlarged view of point A in the middle.

[0041] Figure 4 For the present utility model Figure 1 Enlarged view of point B in the middle.

[0042] Explanation of reference numerals in the attached figures:

[0043] 1. Sewing machine; 11. Tabletop; 12. Machine head; 13. Machine frame; 2. Thread spool; 3. Thread changing assembly; 31. Cylinder; 32. Circular plate; 33. First pre-tension spring; 34. Thread dropper; 35. L-shaped plate; 36. Threaded rod; 37. Pressure plate; 38. Gravity sensor; 39. Limiting groove; 310. Limiting block; 4. Thread management assembly; 41. U-shaped frame; 42. Sliding rod; 43. Sliding block; 44. Second pre-tension spring; 45. Thread loop; 5. Friction reduction assembly; 51. Annular groove; 52. Annular block; 53. Annular plate; 6. Storage assembly; 61. Storage box; 62. Slide groove; 63. Slide rail. Detailed Implementation

[0044] The following will be combined with the appendix Figures 1 to 4 The technical solutions in the embodiments of this utility model are clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0045] Please see Figure 1-3 This utility model embodiment provides a quick thread changing mechanism for a sewing machine, comprising:

[0046] Sewing machine 1 consists of a table 11, a sewing head 12 and a frame 13. The table 11 is used as a mounting carrier for the storage component 6, and the sewing head 12 is used as a mounting carrier for the thread spool 2, the thread changing component 3 and the thread organizing component 4.

[0047] The wire changing component 3 is used to change the wire in the wire spool 2;

[0048] The line replacement assembly 3 includes:

[0049] Cylinder 31 is installed on top of machine head 12;

[0050] Circular plate 32, which is in sliding fit with cylinder 31;

[0051] The first preload springs 33 are all installed between the inner walls of the circular plate 32 and the cylinder 31;

[0052] The wire-dropping shaft 34 is rotatably engaged with the circular plate 32.

[0053] L-shaped plate 35 rotates on the top of machine head 12, and L-shaped plate 35 is located on one side of cylinder 31;

[0054] Threaded rod 36, threaded rod 36 and L-shaped plate 35 are threaded together;

[0055] Pressure plate 37, pressure plate 37 is rotatably engaged with threaded rod 36, and the circular groove opened in pressure plate 37 is sleeved on the drop shaft 34;

[0056] Gravity sensors 38 are installed at the bottom of pressure plate 37, and the two gravity sensors 38 abut against the top of spool 2;

[0057] The limiting grooves 39 are all opened on both sides of the inner wall of the cylinder 31;

[0058] Limiting block 310 slides with limiting groove 39, and the two limiting blocks 310 are fixedly connected to both sides of circular plate 32.

[0059] In practical application, after the thread spool 2 is fitted onto the thread dropper shaft 34, the L-shaped plate 35 is manually rotated, and then the threaded rod 36 is turned to drive the pressure plate 37 to move downward along the axial direction of the thread dropper shaft 34. This causes the circular groove at the bottom of the pressure plate 37 to fit onto the thread dropper shaft 34. The pressure plate 37 continues to move downward, causing the two gravity sensors 38 at the bottom of the pressure plate 37 to contact the top of the thread spool 2. The pressure value of the gravity sensors 38 shows a linear upward trend, which also causes the circular plate 32 to slide downward inside the cylinder 31. Simultaneously, it causes the two limiting blocks 310 to slide down synchronously in the limiting groove 39, causing the two first pre-tension springs 33 to undergo elastic deformation. When the sewing machine 1 is started, as the amount of thread on the thread spool 2 decreases, the weight of the thread spool 2 decreases, and the pressure value of the gravity sensors 38 shows a linear downward trend. The gravity sensors 38 collect pressure data in real time and transmit it to the external controller. When the pressure value drops to a preset threshold, such as five percent of the initial value, the controller triggers the alarm on the L-shaped plate 35. The alarm signal reminds the staff to prepare to change the thread 10 seconds in advance.

[0060] This embodiment, by setting up the line-changing component 3, facilitates the advance line-changing operation of the reel 2, avoiding the phenomenon of line breakage or equipment shutdown caused by the reel 2 being completely used up. It transforms the line-changing operation from passive post-interruption processing to proactive pre-warning preparation, improving the efficiency of line-changing of the reel 2, further realizing rapid line-changing operation of the reel 2, shortening downtime, accelerating production efficiency, and further improving the practicality of the equipment, which is beneficial to practical application and operation.

[0061] Please see Figure 2-3 In a preferred embodiment of this utility model, a friction-reducing component 5 is further provided on the line-changing assembly 3. The friction-reducing component 5 includes:

[0062] An annular groove 51 is formed at the bottom of the limiting block 310, and the annular groove 51 is located between the two gravity sensors 38.

[0063] Annular block 52, which is in sliding fit with annular groove 51;

[0064] An annular plate 53 is installed at the bottom of the annular block 52, and the annular plate 53 is in contact with the top of the spool 2.

[0065] In practical application, when the sewing machine 1 is driven, the thread spool 2 rotates on the thread drop shaft 34, thereby driving the annular plate 53 to rotate, which in turn drives the annular block 52 on the annular plate 53 to slide in the annular groove 51.

[0066] In this embodiment, by setting the friction-reducing component 5, the friction between the spool 2 and the pressure plate 37 can be reduced, thereby increasing the rotational speed of the spool 2.

[0067] Please see Figure 2In a preferred embodiment of this utility model, the cable management component 4 includes:

[0068] U-shaped frame 41 is installed on the top of machine head 12, and U-shaped frame 41 is located on the side of cylinder 31 away from L-shaped plate 35;

[0069] The slide bar 42 is installed between the inner sides of the U-shaped frame 41;

[0070] Slider 43 is in sliding engagement with slider 42, and one side of slider 43 is in sliding engagement with the inner side of U-shaped frame 41.

[0071] The wire loop 45 is installed on the side of the slider 43 away from the U-shaped frame 41;

[0072] The second preload spring 44 is sleeved on the slide rod 42, and the second preload spring 44 is located between the inner side of the slider 43 and the U-shaped frame 41.

[0073] In practical application, when the line on the spool 2 is continuously pulled up and down, and with the help of two second pre-tension springs 44, the line ring 45 on the slider 43 slides up and down in the slide rod 42 inside the U-shaped frame 41.

[0074] This embodiment uses a cable management component 4 to facilitate the autonomous cable management of the cable on the cable spool 2, preventing tangling.

[0075] Please see Figure 1 and 4 In a preferred embodiment of this utility model, the storage component 6 includes:

[0076] Storage box 61;

[0077] The slides 62 are all located at the bottom of the tabletop 11;

[0078] The slide rails 63 are all installed on the top of the storage box 61, and the slide rails 63 and the slide grooves 62 cooperate with each other.

[0079] In practical application, the storage box 61 is manually pulled, causing the two slide rails 63 on the storage box 61 to slide on the two slide grooves 62 at the bottom of the sewing machine 1.

[0080] This embodiment provides a storage component 6 to facilitate the storage and organization of spare parts or multiple spools of thread 2 on the sewing machine 1.

[0081] Please see Figure 1-4 In a preferred embodiment of this utility model, an alarm is provided on the top of the L-shaped plate 35, and the gravity sensor 38 is electrically connected to the alarm.

[0082] In this embodiment, an alarm is set up to remind staff to replace the reel 2.

[0083] Based on the explanations and teachings in the foregoing specification, those skilled in the art can make changes and modifications to the above embodiments. Therefore, this utility model is not limited to the specific embodiments disclosed and described above, and any modifications and alterations to this utility model should also fall within the protection scope of the claims of this utility model. Furthermore, although some specific terms are used in this specification, these terms are only for convenience of explanation and do not constitute any limitation on this utility model.

Claims

1. A quick thread-changing mechanism for a sewing machine, characterized in that: include: A sewing machine (1) is composed of a table (11), a head (12) and a frame (13). The table (11) is used as a mounting carrier for the storage component (6), and the head (12) is used as a mounting carrier for the thread spool (2), the thread changing component (3) and the thread organizing component (4). The wire changing assembly (3) is used to perform wire changing operations on the wire spool (2); The line-changing assembly (3) includes: A cylinder (31) is installed on top of the machine head (12); A circular plate (32) is slidably fitted with a cylinder (31); The first preload spring (33) is installed between the inner wall of the circular plate (32) and the cylinder (31); A wire-dropping shaft (34) is rotatably engaged with a circular plate (32); L-shaped plate (35) rotates on top of the machine head (12) and the L-shaped plate (35) is located on one side of the cylinder (31); A threaded rod (36) is threadedly engaged with an L-shaped plate (35); Pressure plate (37), the pressure plate (37) is rotatably engaged with threaded rod (36), and the circular groove opened in the pressure plate (37) is sleeved on the drop shaft (34); Gravity sensors (38) are installed at the bottom of the pressure plate (37), and the two gravity sensors (38) abut against the top of the bobbin (2).

2. The quick thread changing mechanism for a sewing machine according to claim 1, characterized in that: The line-changing assembly (3) also includes: The limiting grooves (39) are all opened on both sides of the inner wall of the cylinder (31); Limiting block (310), the limiting block (310) slides in conjunction with the limiting groove (39), and the two limiting blocks (310) are fixedly connected to both sides of the circular plate (32).

3. The quick thread changing mechanism for a sewing machine according to claim 1, characterized in that: It also includes a friction-reducing component (5) disposed on the line-changing assembly (3), the friction-reducing component (5) comprising: An annular groove (51) is formed at the bottom of the limiting block (310), and the annular groove (51) is located between the two gravity sensors (38); An annular block (52) is slidably fitted with an annular groove (51); An annular plate (53) is installed at the bottom of the annular block (52), and the annular plate (53) is in contact with the top of the spool (2).

4. The quick thread changing mechanism for a sewing machine according to claim 1, characterized in that: The cable management component (4) includes: A U-shaped frame (41) is installed on top of the machine head (12), and the U-shaped frame (41) is located on the side of the cylinder (31) away from the L-shaped plate (35); The slide bar (42) is installed between the inner sides of the U-shaped frame (41); The slider (43) is slidably engaged with the slide rod (42), and one side of the slider (43) is slidably engaged with the inner side of the U-shaped frame (41); A wire loop (45) is installed on the side of the slider (43) away from the U-shaped frame (41); The second preload spring (44) is sleeved on the slide rod (42), and the second preload spring (44) is located between the slider (43) and the inner side of the U-shaped frame (41).

5. A quick thread-changing mechanism for a sewing machine according to claim 1, characterized in that: The storage component (6) includes: Storage box (61); The slides (62) are all located at the bottom of the tabletop (11); The slide rails (63) are all installed on the top of the storage box (61), and the slide rails (63) and the slide grooves (62) cooperate with each other.

6. A quick thread changing mechanism for a sewing machine according to claim 1, characterized in that: An alarm is provided on the top of the L-shaped plate (35), and the gravity sensor (38) is electrically connected to the alarm.

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