Sewing machine adjustment mechanism and method of using same

Abstract

The application discloses a sewing machine adjusting mechanism and a use method thereof, which comprise a base, a sewing machine body, a needle bar, a fine adjustment mechanism, a positioning mechanism and a pressing mechanism, the fine adjustment mechanism is used for forming an adjusting structure at the bottom of the needle bar and adjusting the position of a needle head, the positioning mechanism is used for forming a limiting structure on the fine adjustment mechanism and fixing the fine adjustment mechanism, and the pressing mechanism is used for forming a pressing structure on the positioning mechanism. By rotating the mounting pipe, the fixed block is driven to rotate together. With the rotation of the fixed block, the fixed block is pressed against the inner wall of the mounting groove, so that the fixed block slides along the inner wall of the mounting groove. By pressing the mounting groove with the fixed block, the movable seat slides at the bottom of the needle bar. The movable seat drives the needle head to move in the vertical direction, the position of the movable seat and the needle head in the vertical direction is adjusted, the distance between the needle head and the fabric is adjusted conveniently, and different thicknesses of the fabric are processed conveniently.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of sewing machines, in particular to a sewing machine adjusting mechanism and a method thereof. BACKGROUND

[0002] A sewing machine is a common fabric processing equipment, which can form one or more stitches on the fabric by one or more sewing threads, so as to interweave and sew one or more layers of fabric together. The sewing machine can sew cotton, hemp, silk, wool, synthetic fiber, leather, plastic and paper products, and the formed stitches are neat, beautiful, flat and firm, and the sewing speed is fast and the use is simple.

[0003] When the common sewing machine is used, multiple layers of fabric are stacked under the needle, the needle drives the sewing thread to move vertically and reciprocally between the fabrics, and the fabric is uniformly pulled, so that the sewing thread forms a sewing stitch on the fabric. However, when sewing fabrics of different thicknesses and different numbers of layers, the thickness of the sewing position of the fabric is different, and the height of the needle bar is usually adjusted directly by the adjusting device on one side of the sewing machine. The adjustment range of the needle bar adjustment mode is large, and it is not convenient to accurately adjust the distance between the needle and the fabric, which affects the sewing effect of the needle on the fabric. SUMMARY

[0004] The purpose of the present application is to provide a sewing machine adjusting mechanism and a method thereof to solve the problems raised in the background art.

[0005] To achieve the above purpose, the present application provides the following technical scheme: a sewing machine adjusting mechanism, comprising a base;

[0006] A sewing machine body, the lower surface of the sewing machine body is fixedly connected with the upper surface of the base;

[0007] A needle bar, the needle bar is slidably connected with the bottom of one side of the sewing machine body, and the needle bar is used to drive the needle to move in the vertical direction;

[0008] Further comprising a fine adjustment mechanism, the fine adjustment mechanism is arranged at the bottom of the needle bar, and the fine adjustment mechanism is used to form an adjustment structure at the bottom of the needle bar and adjust the position of the needle;

[0009] A positioning mechanism, the positioning mechanism is arranged at the top of the fine adjustment mechanism, and the positioning mechanism is used to form a limiting structure on the fine adjustment mechanism and fix the fine adjustment mechanism;

[0010] An extrusion mechanism, the extrusion mechanism is arranged on the positioning mechanism, and the extrusion mechanism is used to form a pressing structure on the positioning mechanism.

[0011] Preferably, the fine adjustment mechanism comprises:

[0012] A movable seat, the top of which is slidably inserted into the bottom of the needle bar, the movable seat being used to install and drive the needle to move;

[0013] A fixed seat, the top end of which is fixedly connected to the bottom end of the needle bar, and the inner cavity of the fixed seat is slidably inserted into the top of the movable seat;

[0014] The mounting tube is located below the fixed base, and the inner cavity of the mounting tube is slidably inserted into the movable base.

[0015] A limiting ring is fixedly inserted into the top of the mounting tube, and the limiting ring is rotatably inserted into the inner cavity of the fixed seat.

[0016] Preferably, the fine-tuning mechanism includes:

[0017] The mounting groove is located on the top of the outer wall of the movable seat and is spirally arranged around the movable seat.

[0018] A fixing block is fixedly connected to one side of the top of the inner wall of the mounting tube, and the fixing block is slidably inserted into the inner cavity of the mounting groove;

[0019] The locking block is fixedly connected to both sides of the top of the movable seat;

[0020] The slots are located on both sides of the inner wall of the needle bar, and the inner cavity of the slots is slidably inserted into the card block.

[0021] Preferably, the positioning mechanism includes:

[0022] A retaining ring is fixedly connected to the top of the mounting tube and is located below the fixing seat.

[0023] The locking teeth are arranged in a ring array on the outside of the fixing ring;

[0024] A movable rod is located on one side of the fixed ring and is inclined.

[0025] The positioning block is fixedly connected to the bottom of the movable rod, and the positioning block is slidably interlocked with the adjacent locking teeth.

[0026] Preferably, the positioning mechanism includes:

[0027] Mounting block, one end of which is fixedly connected to one side of the bottom of the needle bar, the mounting block is used to mount the movable rod;

[0028] A connecting shaft, the two ends of which are rotatably inserted into one end of the mounting block, and the connecting shaft is fixedly inserted into the movable rod;

[0029] A fixing rod, the two ends of which are fixedly connected to the inner sidewall of the mounting block;

[0030] A torsion spring is movably connected to a fixed rod, and the torsion spring is located on one side of the movable rod.

[0031] Preferably, the extrusion mechanism includes:

[0032] Movable ring one, which is slidably inserted into the bottom of the needle bar, and is located on one side of the top of the movable bar;

[0033] A connecting block is fixedly connected to one side of the outer wall of the movable ring, and the inner cavity of the connecting block is slidably inserted into the movable rod.

[0034] The protrusion is fixedly connected to one side of the inner wall of the connecting block, and the outer wall of the protrusion is in contact with the outer wall of the movable rod.

[0035] Preferably, the extrusion mechanism includes:

[0036] A connecting rod, the top end of which is fixedly connected to the outer wall of the movable ring, and the connecting rod is arranged in an L-shape;

[0037] The second movable ring is slidably inserted into the mounting tube, and the outer wall of the second movable ring is fixedly connected to the bottom end of the connecting rod.

[0038] Preferably, one end of the torsion spring is in contact with the outer wall of the needle bar, and the other end of the torsion spring is in contact with the outer wall of the movable rod. The torsion spring is used to support and compress the movable rod.

[0039] Preferably, the top of the movable seat is cylindrical, and a sliding groove is provided in the middle of the bottom end of the needle bar. The inner cavity of the sliding groove is slidably inserted and connected to the top of the movable seat.

[0040] The present invention also provides a method for using a sewing machine adjustment mechanism, including the following specific steps:

[0041] Step 1: First, by pushing the second movable ring upward along the mounting tube, the connecting rod and the first movable ring move upward together. The connecting block moves with the first movable ring, causing the connecting block to slide along the top of the movable rod. The protrusion presses against the movable rod, causing the movable rod to rotate around the connecting shaft.

[0042] Step 2: Then, by rotating the movable rod around the connecting shaft, the bottom of the movable rod drives the positioning block to rotate together, causing the positioning block to separate from the locking teeth, releasing the limiting fixation of the installation tube. As the movable rod rotates, the top of the movable rod compresses and deforms the torsion spring. Using the elasticity of the compression spring, the movable rod is pushed to rotate, causing the bottom of the movable rod to drive the positioning block to slide between two adjacent locking teeth, limiting the installation tube and ensuring the stability of the installation tube and the movable seat.

[0043] Step 3: Next, by rotating the mounting tube, the limiting ring rotates within the inner cavity of the fixed seat, causing the mounting tube to rotate around the movable seat. The mounting tube drives the fixed block to rotate together. As the fixed block rotates, it presses against the inner wall of the mounting groove, causing the fixed block to slide along the inner wall of the mounting groove. By using the pressure of the fixed block on the mounting groove, the movable seat moves vertically, causing the locking block to slide vertically along the inner cavity of the locking groove, thus adjusting the vertical position of the movable seat and the needle.

[0044] The technical effects and advantages of this invention are as follows:

[0045] (1) The present invention utilizes the combination of mounting tube, movable seat, fixed block and mounting groove. By rotating the mounting tube, the fixed block is driven to rotate together. As the fixed block rotates, the fixed block is pressed against the inner wall of the mounting groove, causing the fixed block to slide along the inner wall of the mounting groove. By using the fixed block to press against the mounting groove, the movable seat slides at the bottom of the needle bar. The movable seat drives the needle to move in the vertical direction. The vertical position of the movable seat and the needle is adjusted, which makes it convenient to accurately adjust the distance between the needle and the fabric, and facilitates the processing of fabrics of different thicknesses.

[0046] (2) The present invention utilizes a combination of a movable rod, a positioning block, a locking tooth, and a torsion spring. By rotating the movable rod around the connecting shaft, the bottom of the movable rod drives the positioning block to rotate together, causing the positioning block to separate from the locking tooth, thus releasing the limiting fixation of the mounting tube. As the movable rod rotates, the top of the movable rod compresses and deforms the torsion spring. Utilizing the elasticity of the torsion spring, the movable rod is pushed to rotate, causing the bottom of the movable rod to drive the positioning block to slide between two adjacent locking teeth, thus limiting the mounting tube and ensuring the stability of the mounting tube and the movable seat.

[0047] (3) The present invention utilizes the combination of an installation tube, a movable ring one, a movable ring two, a connecting block and a protrusion. By pushing the movable ring two upward along the installation tube, the connecting rod and the movable ring one move upward together. The connecting block moves with the movable ring one, causing the connecting block to slide along the top of the movable rod. The protrusion presses against the movable rod, causing the movable rod to rotate around the connecting shaft, which causes the positioning block to separate from the locking teeth, making it convenient for the installation tube to rotate. Attached Figure Description

[0048] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0049] Figure 2 This is a schematic diagram of the front structure of the sewing machine body of the present invention.

[0050] Figure 3 This is a schematic diagram of the front structure of the needle shaft of the present invention.

[0051] Figure 4 This is a front cross-sectional view of the movable seat of the present invention.

[0052] Figure 5 This is a schematic diagram of the front structure of the movable seat of the present invention.

[0053] Figure 6 For the present invention Figure 4 A magnified structural diagram at point A.

[0054] Figure 7 This is a top-view cross-sectional structural diagram of the movable seat of the present invention.

[0055] In the diagram: 1. Base; 2. Sewing machine body; 3. Needle bar; 4. Fine-tuning mechanism; 41. Movable seat; 42. Fixed seat; 43. Mounting tube; 44. Limiting ring; 45. Mounting groove; 46. Fixing block; 47. Locking block; 48. Locking groove; 5. Positioning mechanism; 51. Fixing ring; 52. Locking tooth; 53. Movable rod; 54. Positioning block; 55. Mounting block; 56. Connecting shaft; 57. Fixing rod; 58. Torsion spring; 6. Compression mechanism; 61. Movable ring one; 62. Connecting block; 63. Protrusion; 64. Connecting rod; 65. Movable ring two. Detailed Implementation

[0056] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0057] This invention provides, for example Figures 1-7The sewing machine adjustment mechanism shown includes a base 1, a sewing machine body 2, a needle bar 3, a fine-tuning mechanism 4, a positioning mechanism 5, and a pressing mechanism 6. The lower surface of the sewing machine body 2 is fixedly connected to the upper surface of the base 1. The sewing machine body 2 is used to drive the needle bar 3 to move vertically. The needle bar 3 is slidably inserted into the bottom of one side of the sewing machine body 2. The needle bar 3 is used to drive the needle tip to move vertically. The needle bar 3 is used to mount the fine-tuning mechanism 4, the positioning mechanism 5, and the pressing mechanism 6, and to drive them to move vertically. The fine-tuning mechanism 4 is located at the bottom of the needle bar 3. The fine-tuning mechanism 4 is used to adjust the needle tip vertically. The bottom of rod 3 forms an adjustment structure and adjusts the position of the needle. The height of the needle is adjusted by the fine-tuning mechanism 4, which facilitates sewing of fabrics of different thicknesses. The positioning mechanism 5 is set on the top of the fine-tuning mechanism 4. The positioning mechanism 5 is used to form a limiting structure on the fine-tuning mechanism 4 and fix the fine-tuning mechanism 4. The positioning mechanism 5 is used to ensure the stability of the fine-tuning mechanism 4. The squeezing mechanism 6 is set on the positioning mechanism 5. The squeezing mechanism 6 is used to form a pressing structure on the positioning mechanism 5. The squeezing mechanism 6 is used to release the positioning mechanism 5 from the limiting of the fine-tuning mechanism 4, which facilitates the movement of the fine-tuning mechanism 4.

[0058] The fine-tuning mechanism 4 includes a movable seat 41, a fixed seat 42, a mounting tube 43, a limiting ring 44, a mounting groove 45, a fixing block 46, a locking block 47, and a locking groove 48. The top of the movable seat 41 is slidably inserted into the bottom of the needle bar 3. The movable seat 41 is used to install and drive the needle to move. The needle is connected to the needle bar 3 through the movable seat 41, driving the needle to move in the vertical direction. The top of the fixed seat 42 is fixedly connected to the bottom of the needle bar 3. The inner cavity of the fixed seat 42 is connected to the movable seat 46. The top of the movable seat 41 is slidably inserted and connected. The fixed seat 42 is used to connect the mounting tube 43 to ensure the stable rotation of the mounting tube 43. The mounting tube 43 is located below the fixed seat 42. The inner cavity of the mounting tube 43 is slidably inserted and connected to the movable seat 41. The mounting tube 43 is cylindrical. The limiting ring 44 is fixedly inserted and connected to the top of the mounting tube 43. The limiting ring 44 is rotatably inserted and connected to the inner cavity of the fixed seat 42. The top of the mounting tube 43 is rotatably connected to the fixed seat 42 through the limiting ring 44. The mounting groove 45 is located on the top of the outer wall of the movable seat 41. The mounting groove 45 is spirally arranged on the movable seat 41 and is used to install the fixing block 46. The mounting groove 45 is spirally arranged on the outer wall of the top of the movable seat 41. The fixing block 46 is fixedly connected to one side of the top of the inner wall of the mounting tube 43. The fixing block 46 is slidably inserted into the inner cavity of the mounting groove 45. The fixing block 46 rotates with the mounting tube 43 and slides along the inner cavity of the mounting groove 45, pressing against the inner wall of the mounting groove 45, so that the movable seat 41 moves in the vertical direction. The locking block 47 is fixedly connected to both sides of the top of the movable seat 41 and moves with the movable seat 41. The locking groove 48 is located on both sides of the inner wall of the needle bar 3 and is used to install the locking block 47. The inner cavity of the locking groove 48 is slidably inserted into the locking block 47. As the movable seat 41 moves, the locking block 47 slides along the locking groove 48, ensuring that the movable seat 41 moves stably in the vertical direction and preventing it from rotating.

[0059] The positioning mechanism 5 includes a fixed ring 51, locking teeth 52, a movable rod 53, a positioning block 54, a mounting block 55, a connecting shaft 56, a fixed rod 57, and a torsion spring 58. The fixed ring 51 is fixedly connected to the top of the mounting tube 43 and rotates together with the mounting tube 43. The fixed ring 51 is located below the fixed seat 42. The locking teeth 52 are arranged in a circular array on the outside of the fixed ring 51, with multiple locking teeth 52 equidistantly spaced on the fixed ring 51. The movable rod 53 is located on one side of the fixed ring 51 and is inclined. The movable rod 53 is used to fix the positioning block 54 and drive the positioning block 54 to rotate. The positioning block 54 is fixedly connected to the bottom of the movable rod 53. The positioning block 54 is slidably inserted between adjacent locking teeth 52. By sliding the positioning block 54 between two adjacent locking teeth 52, the fixed ring 51 and the mounting tube 43 are limited. To prevent it from rotating, one end of the mounting block 55 is fixedly connected to one side of the bottom of the needle bar 3. The mounting block 55 is used to install the movable rod 53, which is located between the two mounting blocks 55. The two ends of the connecting shaft 56 are respectively rotatably connected to one end of the mounting block 55. The connecting shaft 56 is fixedly connected to the movable rod 53. The movable rod 53 is rotatably connected to the two mounting blocks 55 through the connecting shaft 56. The two ends of the fixed rod 57 are respectively fixedly connected to the inner side wall of the mounting block 55. The fixed rod 57 is located between the two mounting blocks 55 and is used to install the torsion spring 58. The torsion spring 58 is movably sleeved with the fixed rod 57. The torsion spring 58 is located on one side of the movable rod 53. When the movable rod 53 rotates around the connecting shaft 56, one end of the movable rod 53 compresses and deforms the torsion spring 58, and the elasticity of the torsion spring 58 is used to push the movable rod 53 and the positioning block 54 to rotate.

[0060] The extrusion mechanism 6 includes a first movable ring 61, a connecting block 62, a protrusion 63, a connecting rod 64, and a second movable ring 65. The first movable ring 61 is slidably inserted into the bottom of the needle bar 3. The first movable ring 61 is located on one side of the top of the movable rod 53 and slides vertically at the bottom of the needle bar 3. The inner wall of the first movable ring 61 is in contact with the outer wall of the needle bar 3. The connecting block 62 is fixedly connected to one side of the outer wall of the first movable ring 61 and moves with the first movable ring 61. The inner cavity of the connecting block 62 is slidably inserted into the movable rod 53. The protrusion 63 is fixedly connected to one side of the inner wall of the connecting block 62, and the outer wall of the protrusion 63 is in contact with the outer wall of the movable rod 53. The protrusion 63 is used to extrude the top of the movable rod 53. The first movable ring 61 drives the connecting block 62 to move upward, and the connecting block 62 drives the protrusion 64 to extrude the first movable ring 53. The rod 53 is pressed, causing the movable rod 53 to rotate around the connecting shaft 56. The top end of the connecting rod 64 is fixedly connected to the outer wall of the movable ring 61. The connecting rod 64 is L-shaped and is used to fix the movable ring 65 and the movable ring 61. The movable ring 65 is slidably inserted into the mounting tube 43. The outer wall of the movable ring 65 is fixedly connected to the bottom end of the connecting rod 64. By moving the movable ring 65 along the mounting tube 43, the movable ring 61 is moved vertically. One end of the torsion spring 58 is in contact with the outer wall of the needle bar 3, and the other end of the torsion spring 58 is in contact with the outer wall of the movable rod 53. The torsion spring 58 is used to support and press the movable rod 53. The top of the movable seat 41 is cylindrical. A sliding groove is opened in the middle of the bottom end of the needle bar 3. The inner cavity of the sliding groove is slidably inserted into the top of the movable seat 41.

[0061] How to use this invention:

[0062] First, by pushing the second movable ring 65 upward along the mounting tube 43, the connecting rod 64 and the first movable ring 61 move upward together. The connecting block 62 moves with the first movable ring 61, causing the connecting block 62 to slide along the top of the movable rod 53. The protrusion 63 presses against the movable rod 53, causing the movable rod 53 to rotate around the connecting shaft 56.

[0063] Then, by rotating the movable rod 53 around the connecting shaft 56, the bottom of the movable rod 53 drives the positioning block 54 to rotate together, so that the positioning block 54 separates from the locking teeth 52, releasing the limiting fixation of the mounting tube 43. As the movable rod 53 rotates, the top of the movable rod 53 compresses and deforms the torsion spring 58. Using the elastic action of the torsion spring 58, the movable rod 53 is pushed to rotate, so that the bottom of the movable rod 53 drives the positioning block 54 to slide between two adjacent locking teeth 52, limiting the mounting tube 43 and ensuring the stability of the mounting tube 43 and the movable seat 41.

[0064] Next, by rotating the mounting tube 43, the limiting ring 44 is driven to rotate in the inner cavity of the fixed seat 42, so that the mounting tube 43 rotates around the movable seat 41. The mounting tube 43 drives the fixed block 46 to rotate together. As the fixed block 46 rotates, the fixed block 46 presses against the inner wall of the mounting groove 45, so that the fixed block 46 slides along the inner wall of the mounting groove 45. By using the pressing of the fixed block 46 against the mounting groove 45, the movable seat 41 moves in the vertical direction, driving the locking block 47 to slide vertically along the inner cavity of the locking groove 48, thereby adjusting the vertical position of the movable seat 41 and the needle.

[0065] Finally, it should be noted that the above description 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 foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A sewing machine adjusting mechanism, comprising: a base (1); a sewing machine body (2), the lower surface of which is fixedly connected with the upper surface of the base (1); a needle bar (3), which is slidingly and penetratingly connected with the bottom of one side of the sewing machine body (2), and is used to drive the needle to move in the vertical direction; characterized in that it further comprises a fine adjustment mechanism (4), which is arranged at the bottom of the needle bar (3), is used to form an adjusting structure at the bottom of the needle bar (3) and adjust the position of the needle, and comprises a movable seat (41), the top of which is slidingly and penetratingly connected with the bottom of the needle bar (3), and is used to install and drive the needle to move; a fixed seat (42), the top end of which is fixedly connected with the bottom end of the needle bar (3), and the inner cavity of which is slidingly and penetratingly connected with the top of the movable seat (41); an installation tube (43), which is arranged below the fixed seat (42), and the inner cavity of which is slidingly and penetratingly connected with the movable seat (41); a limiting ring (44), which is fixedly and penetratingly connected with the top of the installation tube (43), and is rotationally and penetratingly connected with the inner cavity of the fixed seat (42); an installation groove (45), which is arranged at the top of the outer wall of the movable seat (41), and is arranged in a spiral around the movable seat (41); a fixed block (46), which is fixedly connected with one side of the top of the inner wall of the installation tube (43), and is slidingly and penetratingly connected with the inner cavity of the installation groove (45); a clamping block (47), which is fixedly connected with both sides of the top of the movable seat (41); a clamping groove (48), which is arranged at both sides of the inner wall of the needle bar (3), and the inner cavity of which is slidingly and penetratingly connected with the clamping block (47); a positioning mechanism (5), which is arranged at the top of the fine adjustment mechanism (4), is used to form a limiting structure on the fine adjustment mechanism (4) and fix the fine adjustment mechanism (4), and comprises a fixed ring (51), which is fixedly connected with the top of the installation tube (43), and is arranged below the fixed seat (42); a clamping tooth (52), which is arranged in an annular array on the outside of the fixed ring (51); a movable rod (53), which is arranged at one side of the fixed ring (51), and is arranged in an inclined manner; a positioning block (54), which is fixedly connected with the bottom of the movable rod (53), and is slidingly and penetratingly connected between adjacent clamping teeth (52); an installation block (55), one end of which is fixedly connected with one side of the bottom of the needle bar (3), and which is used to install the movable rod (53). A connecting shaft (56) is rotatably connected with the mounting block (55), and the connecting shaft (56) is fixedly connected with the movable rod (53); A fixed rod (57) is fixedly connected with the wall of the mounting block (55); A torsion spring (58) is movably sleeved with the fixed rod (57), and the torsion spring (58) is arranged on one side of the movable rod (53); An extrusion mechanism (6) is arranged on the positioning mechanism (5), and the extrusion mechanism (6) is used for forming a pressing structure on the positioning mechanism (5); the extrusion mechanism (6) comprises a movable ring one (61), the movable ring one (61) is slidably connected with the bottom of the needle rod (3), and the movable ring one (61) is arranged on one side of the top of the movable rod (53); A connecting block (62) is fixedly connected with one side of the outer wall of the movable ring one (61), and the inner cavity of the connecting block (62) is slidably connected with the movable rod (53); A protruding block (63) is fixedly connected with one side of the inner wall of the connecting block (62), and the outer wall of the protruding block (63) is in close contact with the outer wall of the movable rod (53); A connecting rod (64) is fixedly connected with the outer wall of the movable ring one (61) at the top end, and the connecting rod (64) is arranged in an L shape; A movable ring two (65) is slidably connected with the mounting pipe (43), and the outer wall of the movable ring two (65) is fixedly connected with the bottom end of the connecting rod (64); By pushing the movable ring two (65) upwards along the mounting pipe (43), the movable ring one (61) is driven to move upwards, the protruding block (63) on the connecting block (62) extrudes and rotates the movable rod (53), the positioning block (54) is separated from the toothed clamping (52), the limiting and fixing of the mounting pipe (43) is released, the mounting pipe (43) is rotated again, the limiting ring (44) is driven to rotate in the inner cavity of the fixed seat (42), the mounting pipe (43) rotates around the movable seat (41), the mounting pipe (43) drives the fixed block (46) to rotate together, the fixed block (46) extrudes the inner wall of the mounting groove (45), the fixed block (46) slides along the inner wall of the mounting groove (45), and the movable seat (41) moves in the vertical direction, so that the height of the movable seat (41) and the needle is adjusted.

2. A sewing machine adjustment mechanism according to claim 1, wherein One end of the torsion spring (58) is in close contact with the outer wall of the needle rod (3), the other end of the torsion spring (58) is in close contact with the outer wall of the movable rod (53), and the torsion spring (58) is used for supporting and extruding the movable rod (53).

3. A sewing machine adjustment mechanism according to claim 2, wherein The top of the movable seat (41) is arranged in a cylindrical shape, a sliding groove is formed in the middle of the bottom end of the needle rod (3), and the inner cavity of the sliding groove is slidably connected with the top of the movable seat (41).

Images