A presser foot mechanism for a sewing machine and a sewing machine

Abstract

The present application relates to sewing machine technical field, disclose a kind of sewing machine presser mechanism and sewing machine, including presser bar and needle bar, the lower end of presser bar is equipped with presser foot, presser bar is equipped with the adjusting assembly for adjusting the pressure and lifting height of presser foot;Adjusting assembly includes adjusting box, the upper end of presser bar is inserted and is equipped with adjusting rod, adjusting assembly further includes the adjusting block of being sleeved on presser bar and needle bar, first adjusting piece is provided in adjusting box, second adjusting piece is further provided in adjusting box;Adjusting box is equipped with the driving member that it extends, clutch member is provided in adjusting box, driving member is switched by clutch member to realize first adjusting piece or second adjusting piece alone work.By switching of clutch member, driving member can independently drive first adjusting piece and second adjusting piece work, so that when the pressure or lifting height of presser foot is adjusted, the disassembly operation of end cover is not needed, so as to facilitate actual use.

Description

Technical Field

[0001] This invention relates to the field of sewing machine technology, and more specifically, to a sewing machine pressing mechanism and 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, allowing one or more layers of fabric to interweave or sew together. A sewing machine mainly consists of four parts: the machine head, the base, the transmission, and accessories. The machine head is the main part of the sewing machine, and it includes the presser foot mechanism. Currently, the presser foot mechanism in sewing machines on the market is usually a presser foot mechanism. The presser foot mechanism mainly consists of a presser foot bar and a presser foot installed at the lower end of the presser foot bar. The presser foot cooperates with the feed dog in the sewing machine to move the fabric backward during the sewing process.

[0003] In existing sewing machines, adjusting the presser foot's lifting height and pressure requires removing the end cap on the machine head to expose the presser foot mechanism inside. At this point, the operator then needs to adjust the presser foot lever using tools, which is cumbersome and requires repeated adjustments, wasting time and effort and affecting the normal operation of the sewing machine. Summary of the Invention

[0004] The purpose of this invention is to provide a sewing machine pressing mechanism and a sewing machine to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A sewing machine pressing mechanism includes a presser foot bar and a needle bar arranged side by side in the machine head. The lower end of the presser foot bar is provided with a detachable presser foot, and the presser foot bar is provided with an adjustment component for adjusting the presser foot pressure and lifting height.

[0007] The adjustment assembly includes an adjustment box, and an adjustment rod that passes through the adjustment box is inserted into the upper end of the presser foot rod. The adjustment assembly also includes an adjustment block sleeved on the presser foot rod and the needle rod. The adjustment box is provided with a first adjustment component for driving the presser foot rod and the adjustment block to rise and fall as a whole. The adjustment box is also provided with a second adjustment component for driving the adjustment block to rise and fall along the presser foot rod.

[0008] The regulating box is equipped with a drive component that extends through it, and a clutch component is installed inside the regulating box. The drive component is switched by the clutch component to enable the first regulating component or the second regulating component to work independently.

[0009] Furthermore, the first adjusting member includes a retaining ring disposed outside the adjusting rod, and the adjusting rod located below the retaining ring is fitted with a first spring that abuts against the presser foot rod;

[0010] The clutch includes an upper rotating cylinder and a lower rotating cylinder that are rotatably disposed in the adjustment box. The adjustment rod is threaded through the upper rotating cylinder and the lower rotating cylinder. The lower rotating cylinder has a connecting part that is threadedly connected to the adjustment rod. The rotation of the lower rotating cylinder is used to drive the adjustment rod to rise and fall.

[0011] Furthermore, the driving component includes a driving ring sleeved around the adjusting rod and located on the upper and lower rotating cylinders. The driving ring is provided with a turning column extending through the adjusting box, and active ratchet teeth are provided on the upper and lower sides of the driving ring.

[0012] The upper end of the lower rotating cylinder is provided with a lower driven ratchet that cooperates with the corresponding driving ratchet.

[0013] Furthermore, the second adjusting component includes a sleeve rod rotatably mounted on the adjusting block and sleeved outside the adjusting rod, the lower end of the sleeve rod being threaded to the outer wall of the presser foot rod, and the upper end of the sleeve rod being provided with a gear post;

[0014] Gears are provided on the outer side wall of the upper rotating cylinder. The regulating box contains rotating shafts located on both sides of the upper rotating cylinder with their lower ends extending out of the regulating box. A first driven gear meshing with the gears is provided on the rotating shafts, and a second driven gear meshing with the gear post is provided at the lower end of the rotating shafts.

[0015] Furthermore, the lower side wall of the upper rotating cylinder is provided with an upper driven ratchet that cooperates with the corresponding active ratchet.

[0016] Furthermore, the lower end of the presser foot rod is provided with a mounting groove, and the presser foot is installed in the mounting groove by screws.

[0017] Furthermore, the presser foot includes a presser foot handle and a presser foot plate. The presser foot plate has a hinge groove, the lower end of the presser foot handle extends into the hinge groove, the hinge groove has a hinge shaft that passes through the presser foot handle, and the presser foot handle has an adjustment component for adjusting the tilt angle of the presser foot plate.

[0018] Furthermore, the presser foot handle has a mounting cavity with an opening at the lower end. The adjustment assembly includes a sliding block that is located in the mounting cavity via a second spring. The lower end of the sliding block forms a hinge portion. The hinge portion has a hinge rod with one end hinged to the hinge portion and the other end hinged to the hinge groove. The presser foot handle has an adjustment component for driving the sliding block to rise and fall.

[0019] Furthermore, a groove is provided on one side of the sliding block, and one side wall of the groove forms a guide surface; the adjusting component includes a screw threaded to the pressure foot handle, one end of the screw extending into the groove and cooperating with the guide surface, the screw extending into the groove is used to press the guide surface to make the sliding block move upward.

[0020] The present invention also provides a sewing machine, including a machine body, a machine base, and a sewing head disposed on the machine base. The machine base and the sewing head are rotatably disposed on the upper side of the machine body. The sewing head is provided with a fabric pressing mechanism, which adopts the above-mentioned fabric pressing mechanism.

[0021] Compared with the prior art, the beneficial effects of the present invention are:

[0022] 1. The present invention, through the setting of clutch and drive, enables the drive to independently drive the first and second adjustment components by switching the clutch, thereby eliminating the need to disassemble the end cap when adjusting the pressure of the presser foot or the lifting height, thus facilitating practical use.

[0023] 2. In this invention, the tilt angle of the pressure foot plate can be adjusted by rotating and twisting the screw to insert or extend it into the groove so that it can be kept horizontal. This adjustment operation is simple and convenient and is beneficial to practical use. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the fabric pressing mechanism of a sewing machine according to the present invention.

[0025] Figure 2 This is one of the cross-sectional schematic diagrams of the pressure cloth mechanism in this invention.

[0026] Figure 3 This is the second schematic diagram of the fabric pressing mechanism in this invention.

[0027] Figure 4 This is a schematic diagram of the pressure cloth mechanism in this invention.

[0028] Figure 5 This is a schematic diagram of the semi-sectional fit structure between the clutch and the drive component in this invention.

[0029] Figure 6 This is a partial structural diagram of the adjustment component in this invention.

[0030] Figure 7 This is a half-sectional view of the first adjusting member on the presser foot rod in this invention.

[0031] Figure 8 for Figure 2 An enlarged schematic diagram of part A in the middle.

[0032] Figure 9 This is a schematic diagram of the presser foot in this invention.

[0033] Figure 10 This is a partial structural diagram of the sewing machine in this invention.

[0034] The meanings of the labels in the diagram are as follows:

[0035] 10. Machine base; 20. Machine head; 21. End cap; 30. Needle plate;

[0036] 100. Presser foot; 110. Presser foot lever; 120. Needle bar; 121. Clamping block; 130. Adjustment box; 140. Adjustment block; 150. Sleeve rod; 151. Gear column;

[0037] 200. Adjusting rod; 201. Retaining ring; 202. Insertion hole; 210. First spring; 220. Upper rotating cylinder; 230. Lower rotating cylinder; 240. Drive ring; 241. Turning column;

[0038] 310. Rotating shaft; 311. First driven gear; 312. Second driven gear;

[0039] 511. Driving ratchet; 521. Lower driven ratchet; 522. Connecting part; 523. Assembly slot; 531. Gear; 532. Upper driven ratchet; 540. Third spring; 711. Mounting slot;

[0040] 810, Presser foot handle; 811, Mounting cavity; 820, Presser foot plate; 821, Hinge groove; 830, Second spring; 840, Sliding block; 850, Hinge rod;

[0041] 901, threaded cylinder; 911, groove; 912, guide surface; 920, screw. Detailed Implementation

[0042] To further understand the content of this invention, a detailed description of the invention will be provided in conjunction with the accompanying drawings and embodiments. It should be understood that the embodiments are merely illustrative and not limiting of the invention.

[0043] The following is in conjunction with the appendix Figures 1-10 This embodiment will be described in further detail.

[0044] like Figure 1 As shown, a sewing machine pressing mechanism in this embodiment includes a presser foot bar 110 and a needle bar 120 arranged side by side in the machine head 20. The lower end of the presser foot bar 110 is provided with a detachable presser foot 100. The presser foot bar 110 is provided with an adjustment component for adjusting the pressure and lifting height of the presser foot 100.

[0045] The adjustment assembly includes an adjustment box 130. An adjustment rod 200 is inserted into the upper end of the presser foot rod 110 and passes through the adjustment box 130. The adjustment assembly also includes an adjustment block 140 sleeved on the presser foot rod 110 and the needle rod 120. The adjustment box 130 is provided with a first adjustment component for driving the presser foot rod 110 and the adjustment block 140 to rise and fall as a whole. The adjustment box 130 is also provided with a second adjustment component for driving the adjustment block 140 to rise and fall along the presser foot rod 110.

[0046] The regulating box 130 is provided with a drive component that extends through it, and the regulating box 130 is provided with a clutch component. The drive component is switched by the clutch component to enable the first regulating component or the second regulating component to work independently.

[0047] In practical use, this embodiment is combined with Figure 10 As shown, the presser foot 100 on the presser foot 100 is installed inside the head 20 of the sewing machine and engages with the needle plate 30 on the base 10 of the sewing machine.

[0048] Specifically, the presser foot lever 110 and the needle bar 120 are located at one end of the sewing machine head 20, and the lower ends of both extend through the sewing machine head 20. The lower end of the presser foot lever 110 is provided with a presser foot 100, and the lower end of the needle bar 120 is provided with a needle. In actual use, the sewing machine is provided with a drive structure for driving the needle bar 120 to move up and down. At the same time, the sewing machine head 20 is provided with a switching structure for driving the presser foot lever 110 to be in an upward or downward state. The switching structure is an existing structure used to move the presser foot 100 upward away from the needle plate 30 or to move the presser foot 100 downward close to the needle plate 30.

[0049] Specifically, a clamping block 121 located below the adjusting block 140 is provided on the outer wall of the needle bar 120. In order to adjust and maintain the presser foot bar 110 and the needle bar 120, a detachable end cap 21 is provided at one end of the machine head 20 by screws.

[0050] In actual use, the needle bar 120 and presser foot bar 110 are lowered synchronously to the lowest point. At this time, the adjusting block 140 is raised and lowered along the presser foot bar 110 to adjust the distance between it and the clamping block 121. This allows the distance between the presser foot 100 and the needle plate 30 when the presser foot bar 110 is raised to the highest point to adjust the lifting height of the presser foot 100. It should be noted that existing sewing machines require the end cap 21 to be removed for this type of adjustment.

[0051] In this embodiment, by setting up a driving component and a first adjusting component, the driving component drives the first adjusting component to work, thereby realizing the overall lifting and lowering adjustment of the presser foot rod 110 and the adjusting block 140 to adjust the pressure of the presser foot 100. Specifically, when the presser foot 100 descends onto the needle plate 30, the pressure of the presser foot 100 is adjusted to facilitate the presser foot 100 to press fabrics of different thicknesses so that the fabric can pass through the presser foot 100.

[0052] The driving component and the second adjusting component are designed so that the second adjusting component can work through the driving component, thereby enabling the adjusting block 140 to rise and fall along the presser foot rod 110, thus better adjusting the lifting height of the presser foot 100.

[0053] In this embodiment, by setting the clutch, the drive unit can drive the first adjustment component or the second adjustment component to work independently by switching the clutch during actual use. This eliminates the need to disassemble the end cover 21 when adjusting the pressure or lifting height of the presser foot 100, thus facilitating actual use.

[0054] Combination Figures 2-4 As shown, in this embodiment, the first adjusting member includes a retaining ring 201 disposed outside the adjusting rod 200. The adjusting rod 200 located below the retaining ring 201 is fitted with a first spring 210 that abuts against the presser foot rod 110. Specifically, the upper end of the presser foot rod 110 is provided with a insertion hole 202, and the lower end of the adjusting rod 200 extends into the insertion hole 202.

[0055] The clutch assembly includes an upper rotating cylinder 220 and a lower rotating cylinder 230 rotatably disposed within an adjusting housing 130. An adjusting rod 200 is threaded through the upper rotating cylinder 220 and the lower rotating cylinder 230. Specifically, both the upper rotating cylinder 220 and the lower rotating cylinder 230 are rotatably mounted on the upper and lower side walls of the adjusting housing 130 via bearings. Figure 5 As shown, the lower rotating cylinder 230 is provided with a connecting part 522 that is threadedly connected to the adjusting rod 200. The rotation of the lower rotating cylinder 230 is used to drive the adjusting rod 200 to rise and fall.

[0056] In this embodiment, the first spring 210 is configured such that, in actual use, the upper end of the first spring 210 abuts against the retaining ring 201, and the lower end abuts against the upper end of the presser foot rod 110, so that the lower end of the adjusting rod 200 extends into the insertion hole 202. In actual use, when the presser foot rod 110 descends and drives the presser foot 100 to descend close to the needle plate 30, the position of the retaining ring 201 can be adjusted by raising and lowering the adjusting rod 200 along the insertion hole 202, thereby adjusting the compression degree of the first spring 210, and finally adjusting the pressure of the presser foot 100.

[0057] It should be noted that in this embodiment, a groove is provided on the side wall of the presser foot rod 110 along its axial direction, and a mounting seat for the presser foot rod 110 to pass through is provided in the machine head 20. A slider is provided in the mounting seat and slides in the groove, thereby restricting the presser foot rod 110 and preventing it from rotating circumferentially. The outer wall of the adjusting rod 200 is provided with a recessed groove along its axial direction, and the inner wall of the insertion hole 202 is provided with a protrusion that slides in the recessed groove along its axial direction, thereby forming a keyway fit between the two, which restricts the adjusting rod 200 and prevents it from rotating circumferentially. At this time, since the connecting part 522 is threaded to the outside of the adjusting rod 200, the lower rotating cylinder 230 rotates to drive the adjusting rod 200 to rise and fall, so as to adjust the pressure of the presser foot 100.

[0058] In this embodiment, the driving component includes a driving ring 240 that is sleeved on the adjusting rod 200 and located between the upper rotating cylinder 220 and the lower rotating cylinder 230. The driving ring 240 is provided with a twisting post 241 that extends through the adjusting box 130. The upper and lower sides of the driving ring 240 are provided with active ratchet teeth 511.

[0059] The upper end of the lower rotating cylinder 230 is provided with a lower driven ratchet 521 that cooperates with the corresponding active ratchet 511.

[0060] In actual use, by pulling and twisting the column 241, the drive ring 240 can be driven to rise and fall along the adjusting rod 200. Therefore, when the operator moves the column 241 down, the drive ring 240 moves down, so that the active ratchet 511 at its lower end engages with the driven ratchet 521 to achieve the cooperation between the two. At this time, by rotating the column 241, the lower rotating cylinder 230 can be rotated to adjust the pressure of the pressure foot 100. The operation is simple and convenient.

[0061] In this embodiment, the second adjusting member includes a sleeve rod 150 that is rotatably mounted on the adjusting block 140 and sleeved outside the adjusting rod 200. Specifically, the lower end of the sleeve rod 150 is rotatably mounted on the adjusting block 140 through a bearing. The lower end of the sleeve rod 150 is threaded to the outer wall of the presser foot rod 110, and a gear column 151 is fixedly provided at the upper end of the sleeve rod 150.

[0062] A gear 531 is fixedly installed on the outer wall of the upper rotating cylinder 220. The adjusting box 130 is provided with a rotating shaft 310 located on both sides of the upper rotating cylinder 220 and extending out of the adjusting box 130 at its lower end. Specifically, the rotating shaft 310 is rotatably installed in the adjusting box 130 through bearings. The upper end of the rotating shaft 310 is provided with a first driven gear 311 that meshes with the gear 531, and the lower end of the rotating shaft 310 is provided with a second driven gear 312 that meshes with the gear post 151.

[0063] In this embodiment, through the above-described structure, when the upper rotating cylinder 220 rotates, the gear 531 and the first driven gear 311 work together to drive the rotating shaft 310 to rotate. Through the setting of the second driven gear 312 and the gear column 151, the sleeve rod 150 is driven to rotate. At this time, under the action of the switching structure, the presser foot rod 110 is in the lowest position. At this time, due to the threaded connection between the sleeve rod 150 and the presser foot rod 110, the rotation of the sleeve rod 150 can drive it and the adjusting block 140 to rise and fall along the presser foot rod 110, thereby realizing the adjustment of the lifting height of the presser foot 100.

[0064] It should be noted that in this embodiment, the adjustment box 130 is detachably installed inside the machine head 20 by screws. At this time, the upper end of the turning column 241 extends through the adjustment box 130 and the machine head 20 to allow the operator to perform lifting and rotation operations.

[0065] In this embodiment, in order to realize the rotation of the upper rotating cylinder 220, the lower side wall of the upper rotating cylinder 220 is provided with an upper driven ratchet 532 that cooperates with the corresponding active ratchet 511. Thus, in actual operation, the operator lifts the screwing column 241 so that the active ratchet 511 at its upper end is engaged in the upper driven ratchet 532 to realize the cooperation between the two. At this time, the rotation of the upper rotating cylinder 220 can be realized by rotating the screwing column 241, which is simple and convenient to operate.

[0066] Specifically, to prevent the drive ring 240 from shifting downwards due to its own weight when not in use, which could cause the active ratchet 511 to get stuck in the lower driven ratchet 521 and lead to the mis-rotation of the turning column 241, thus affecting the pressure adjustment of the pressure foot 100 and its use, in this embodiment, an assembly groove 523 is provided in the lower rotating cylinder 230. A third spring 540 is installed in the assembly groove 523 to push the drive ring 240 upwards. The third spring 540 pushes the drive ring 240 upwards to prevent the active ratchet 511 from getting stuck in the lower driven ratchet 521.

[0067] Combination Figure 7 As shown in this embodiment, in order to achieve detachable installation of the presser foot 100 at the lower end of the presser foot rod 110, the lower end of the presser foot rod 110 is provided with a mounting groove 711, and the presser foot 100 is installed in the mounting groove 711 by screws.

[0068] Combination Figure 8 and Figure 9 As shown, in this embodiment, the presser foot 100 includes a presser foot handle 810 and a presser foot plate 820. The presser foot plate 820 is provided with a hinge groove 821. The lower end of the presser foot handle 810 extends into the hinge groove 821. A hinge shaft that passes through the presser foot handle 810 is provided in the hinge groove 821. An adjustment component for adjusting the tilt angle of the presser foot plate 820 is provided on the presser foot handle 810.

[0069] In this embodiment, the presser foot 100 is installed at the lower end of the presser foot rod 110 by installing the presser foot handle 810 in the mounting groove 711. The presser foot plate 820 is hinged at the lower end of the presser foot handle 810 by passing through the hinge shaft through the lower end of the presser foot handle 810. In actual use, the presser foot plate 820 needs to be installed horizontally at the lower end of the presser foot handle 810 so that when the presser foot 100 descends onto the needle plate 30, the presser foot plate 820 is horizontal so that the fabric can pass between the presser foot plate 820 and the needle plate 30.

[0070] By adjusting the settings of the components, the tilt angle of the presser foot 820 can be adjusted, thereby better keeping the presser foot 820 horizontal, which is beneficial for actual use.

[0071] In this embodiment, the presser foot handle 810 has a mounting cavity 811 with an opening at the lower end. The adjustment assembly includes a sliding block 840 located in the mounting cavity 811 via a second spring 830. The lower end of the sliding block 840 forms a hinge portion. The hinge portion has a hinge rod 850 with one end hinged to the hinge portion and the other end hinged to the hinge groove 821. Specifically, the hinge portion has a hinge shaft passing through one end of the hinge rod 850, and the hinge groove 821 also has a hinge shaft passing through the other end of the hinge rod 850. In this way, the two ends of the hinge rod 850 are hingedly connected in the sliding block 840 and the hinge groove 821. The presser foot handle 810 is provided with an adjustment component for driving the sliding block 840 to rise and fall.

[0072] In this embodiment, a groove 911 is provided on one side of the sliding block 840, and a guide surface 912 is formed on one side wall of the groove 911. The adjusting component includes a screw 920 threadedly connected to the presser foot handle 810. One end of the screw 920 extends into the groove 911 and cooperates with the guide surface 912. The screw 920 extends into the groove 911 to press the guide surface 912 so that the sliding block 840 moves upward.

[0073] In practical use, the end of the screw 920 extending into the groove 911 forms a guide platform that mates with the guide surface 912. In conjunction with the second spring 830, rotating the screw 920 moves it into the groove 911, causing the guide platform to press against the guide surface 912, thus moving the sliding block 840 upwards. At this time, the second spring 830 is compressed, causing the hinge rod 850 to pull the pressure foot plate 820 to rotate downwards around the hinge axis. Rotating the screw 920 moves it out of the groove 911, causing the second spring 830 to reset, pushing the sliding block 840 downwards. This causes the hinge rod 850 to pull the pressure foot plate 820 to rotate upwards around the hinge axis. Therefore, by rotating the screw 920, the tilt angle of the pressure foot plate 820 can be adjusted optimally to maintain its horizontal position, making operation simple and convenient.

[0074] In order to better achieve the threaded engagement between the screw 920 and the presser foot handle 810, a threaded cylinder 901 is formed by protruding outward on the side wall of the presser foot handle 810 to increase the threaded connection distance between it and the screw 920, so that the threaded connection of the screw 920 on the presser foot handle 810 is more stable.

[0075] like Figure 10 As shown, the present invention also provides a sewing machine, including a machine body (not shown in the figure), a machine base 10 and a sewing head 20 disposed on the machine base 10. The machine base 10 and the sewing head 20 are rotatably disposed on the upper side of the machine body, and the sewing head 20 is provided with the above-mentioned fabric pressing mechanism.

[0076] In this embodiment, when the pressure of the presser foot 100 needs to be adjusted, the presser foot lever 110 and needle bar 120 are first lowered to their lowest points. Then, the rotating pin 241 is pressed down, causing the corresponding active ratchet 511 to engage with the lower driven ratchet 521. The pressure of the presser foot 100 can then be adjusted by rotating the rotating pin 241. When the lifting height of the presser foot 100 needs to be adjusted, the presser foot lever 110 and needle bar 120 are first lowered to their lowest points. Then, the rotating pin 241 is lifted up, causing the corresponding active ratchet 511 to engage with the upper driven ratchet 532. The lifting height of the presser foot 100 can then be adjusted by rotating the rotating pin 241. Compared to existing sewing machines, the sewing machine in this embodiment does not require disassembling the end cap 21 when adjusting the lifting height of the presser foot 100, making it easier to use.

[0077] In summary, the above description is only a preferred embodiment of the present invention. All equivalent changes and modifications made within the scope of the claims of the present invention should be covered by the present invention.

Claims

1. A fabric pressing mechanism for a sewing machine, comprising a presser foot bar (110) and a needle bar (120) arranged side-by-side within a machine head (20), wherein a detachable presser foot (100) is provided at the lower end of the presser foot bar (110), characterized in that: The presser foot lever (110) is provided with an adjustment component for adjusting the pressure and lifting height of the presser foot (100); The adjustment assembly includes an adjustment box (130), and an adjustment rod (200) is inserted into the upper end of the presser foot rod (110) and passes through the adjustment box (130). The adjustment assembly also includes an adjustment block (140) sleeved on the presser foot rod (110) and the needle rod (120). The adjustment box (130) is provided with a first adjustment component for driving the presser foot rod (110) and the adjustment block (140) to rise and fall as a whole. The adjustment box (130) is also provided with a second adjustment component for driving the adjustment block (140) to rise and fall along the presser foot rod (110). The adjustment box (130) is provided with a drive component extending through it, and the adjustment box (130) is provided with a clutch component. The drive component is switched by the clutch component to realize the independent operation of the first adjustment component or the second adjustment component. The first adjustment component includes a retaining ring (201) located outside the adjustment rod (200), and the adjustment rod (200) located below the retaining ring (201) is provided with a first spring (210) that abuts against the pressure foot rod (110). The clutch includes an upper rotating cylinder (220) and a lower rotating cylinder (230) rotatably disposed within an adjusting box (130). An adjusting rod (200) is threaded through the upper rotating cylinder (220) and the lower rotating cylinder (230). The lower rotating cylinder (230) has a connecting part (522) threadedly connected to the adjusting rod (200). The rotation of the lower rotating cylinder (230) is used to drive the adjusting rod (200) to rise and fall. The driving component includes a driving ring (240) sleeved outside the adjusting rod (200) and located between the upper rotating cylinder (220) and the lower rotating cylinder (230). The driving ring (240) has a turning pin (241) extending through the adjusting box (130). The upper and lower sides of the driving ring (240) are provided with active ratchet teeth (511). The upper end of the lower rotating cylinder (230) is provided with a lower driven ratchet (521) that cooperates with the corresponding active ratchet (511); the second adjusting member includes a sleeve rod (150) that is rotatably mounted on the adjusting block (140) and sleeved outside the adjusting rod (200). The lower end of the sleeve rod (150) is threaded to the outer wall of the presser foot rod (110), and the upper end of the sleeve rod (150) is provided with a gear column (151). A gear (531) is provided on the outer wall of the upper rotating cylinder (220). The regulating box (130) is provided with a rotating shaft (310) located on both sides of the upper rotating cylinder (220) and extending out of the regulating box (130) at its lower end. A first driven gear (311) meshing with the gear (531) is provided on the rotating shaft (310). A second driven gear (312) meshing with the gear column (151) is provided at the lower end of the rotating shaft (310). An upper driven ratchet (532) that meshes with the corresponding active ratchet (511) is provided on the lower side wall of the upper rotating cylinder (220).

2. The sewing machine pressing mechanism according to claim 1, characterized in that: The lower end of the presser foot rod (110) is provided with a mounting groove (711), and the presser foot (100) is installed in the mounting groove (711) by screws.

3. The sewing machine pressing mechanism according to claim 2, characterized in that: The presser foot (100) includes a presser foot handle (810) and a presser foot plate (820). The presser foot plate (820) has a hinge groove (821). The lower end of the presser foot handle (810) extends into the hinge groove (821). The hinge groove (821) has a hinge shaft that passes through the presser foot handle (810). The presser foot handle (810) has an adjustment component for adjusting the tilt angle of the presser foot plate (820).

4. The sewing machine pressing mechanism according to claim 3, characterized in that: The presser foot handle (810) has a mounting cavity (811) with an opening at the lower end. The adjustment assembly includes a sliding block (840) located in the mounting cavity (811) via a second spring (830). The lower end of the sliding block (840) forms a hinge portion. The hinge portion has a hinge rod (850) with one end hinged to the hinge portion. The other end of the hinge rod (850) is hinged to the hinge groove (821). The presser foot handle (810) has an adjustment component for driving the sliding block (840) to rise and fall.

5. The sewing machine pressing mechanism according to claim 4, characterized in that: A groove (911) is provided on one side of the sliding block (840), and one side wall of the groove (911) forms a guide surface (912); the adjusting component includes a screw (920) threaded onto the presser foot handle (810), one end of the screw (920) extends into the groove (911) and engages with the guide surface (912), and the screw (920) extends into the groove (911) to press the guide surface (912) so that the sliding block (840) moves upward.

6. A sewing machine, comprising a machine body, a base (10), and a sewing head (20) disposed on the base (10), wherein the base (10) and the sewing head (20) are rotatably disposed on the upper side of the machine body, characterized in that: The machine head (20) is equipped with a fabric pressing mechanism, which adopts the fabric pressing mechanism as described in any one of claims 1-5.

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