Cloth pressing mechanism of sewing machine and sewing machine

Abstract

The invention relates to the technical field of sewing machines, and discloses a sewing machine cloth pressing mechanism and a sewing machine, the sewing machine cloth pressing mechanism comprises a presser foot rod and a needle rod, the lower end part of the presser foot rod is provided with a presser foot, and the presser foot rod is provided with an adjusting assembly for adjusting the pressure and the lifting height of the presser foot; the adjusting assembly comprises an adjusting box, an adjusting rod is arranged at the upper end of the presser foot rod in an inserted mode, the adjusting assembly further comprises an adjusting block arranged on the presser foot rod and the needle rod in a sleeving mode, a first adjusting piece is arranged in the adjusting box, and a second adjusting piece is further arranged in the adjusting box; the adjusting box is provided with a driving piece penetrating through the adjusting box to extend out, a clutch piece is arranged in the adjusting box, and the driving piece is switched through the clutch piece to achieve independent work of the first adjusting piece or the second adjusting piece. Through switching of the clutch piece, the driving piece can independently drive the first adjusting piece and the second adjusting piece to work, so that when the pressure or the lifting height of the presser foot is adjusted, the end cover does not need to be disassembled, and actual use is facilitated.

Description

Technical Field

[0001] The present invention relates to the technical field of sewing machines, in particular to a cloth pressing mechanism of a sewing machine and a sewing machine. Background Art

[0002] A sewing machine uses one or more sewing threads to create one or more stitches on fabric, interweaving or sewing one or more layers of fabric. A sewing machine primarily consists of a machine head, a base, a transmission, and accessories. The machine head is the primary component, including the cloth-pressing mechanism. Currently, the cloth-pressing mechanism in commercial sewing machines is typically a presser foot mechanism, consisting of a presser foot bar and a presser foot mounted at the lower end of the bar. The presser foot cooperates with the machine's feed dog to move the fabric backward during sewing.

[0003] When adjusting the lifting height and pressure of the presser foot of an existing sewing machine, the end cover on the machine head needs to be removed to expose the presser foot mechanism inside the machine head. At this time, the operator has to use tools to adjust the presser foot rod, which is a cumbersome operation and requires repeated debugging, which is time-consuming and labor-intensive, affecting the normal operation of the sewing machine. Summary of the Invention

[0004] The object of the present invention is to provide a cloth pressing mechanism for a sewing machine and a sewing machine, so as to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions: A cloth pressing mechanism of a sewing machine comprises a presser foot rod and a needle bar arranged in parallel in a machine head, a detachable presser foot is provided at the lower end of the presser foot rod, and an adjustment component for adjusting the pressure and lifting height of the presser foot is provided on the presser foot rod; The adjustment assembly includes an adjustment box, an adjustment rod that passes through the adjustment box is inserted at the upper end of the presser foot rod, and the adjustment assembly also includes an adjustment block that is sleeved on the presser foot rod and the needle bar. A first adjustment member for driving the presser foot rod and the adjustment block to rise and fall as a whole is provided in the adjustment box, and a second adjustment member for driving the adjustment block to rise and fall along the presser foot rod is also provided in the adjustment box. The regulating box is provided with a driving member extending through the regulating box, and a clutch member is provided in the regulating box. The driving member is switched by the clutch member to realize the independent operation of the first regulating member or the second regulating member.

[0006] Furthermore, the first adjusting member includes a retaining ring provided outside the adjusting rod, and the outer sleeve of the adjusting rod located below the retaining ring is provided with a first spring abutting against the presser foot rod; The clutch part includes an upper rotating cylinder and a lower rotating cylinder rotatably arranged in the adjustment box. The adjusting rod thread passes through the upper rotating cylinder and the lower rotating cylinder. A connecting part connected to the adjusting rod thread is provided in the lower rotating cylinder. The rotation of the lower rotating cylinder is used to drive the adjusting rod to rise and fall.

[0007] Furthermore, the driving member includes a driving ring which is sleeved outside the adjusting rod and is located on the upper rotating cylinder and the lower rotating cylinder. The driving ring is provided with a twisting column which extends through the adjusting box. Active ratchets are provided on the upper and lower sides of the driving ring. The upper end portion of the lower rotating cylinder is provided with a lower driven ratchet which matches the corresponding driving ratchet.

[0008] Furthermore, the second adjusting member includes a sleeve rod rotatably mounted on the adjusting block and sleeved outside the adjusting rod, the lower end of the sleeve rod is threadedly connected to the outer wall of the presser foot rod, and the upper end of the sleeve rod is provided with a gear column; A gear is provided on the outer wall of the upper rotating cylinder, and a rotating shaft is provided in the adjusting box, which is located on both sides of the upper rotating cylinder and the lower end of which extends out of the adjusting box. A first driven gear meshing with the gear is provided on the rotating shaft, and a second driven gear meshing with the gear column is provided at the lower end of the rotating shaft.

[0009] Furthermore, an upper driven ratchet that matches the corresponding active ratchet is provided on the lower side wall of the upper rotating cylinder.

[0010] Furthermore, a mounting groove is provided at the lower end of the presser foot rod, and the presser foot is mounted in the mounting groove by means of screws.

[0011] Furthermore, the presser foot includes a presser foot handle and a presser foot plate. A hinge groove is provided on the presser foot plate. The lower end of the presser foot handle extends into the hinge groove. A hinge shaft passing through the presser foot handle is provided in the hinge groove. The presser foot handle is provided with an adjustment component for adjusting the inclination angle of the presser foot plate.

[0012] Furthermore, a mounting cavity with an open lower end is provided in the presser foot handle, and the adjustment assembly includes a sliding block arranged in the mounting cavity through a second spring, and a hinge portion is formed at the lower end of the sliding block, and a hinge rod is provided on the hinge portion with one end hingedly connected to the hinge portion, and the other end of the hinge rod is hingedly connected to the hinge groove, and an adjusting part is provided on the presser foot handle for driving the sliding block to rise and fall.

[0013] Furthermore, a groove is provided on one side surface of the sliding block, and a side wall of the groove forms a guide surface; the adjusting part includes a screwing pin threadedly connected to the presser foot handle, one end of the screwing pin extends into the groove and cooperates with the guide surface, and the screwing pin extends into the groove to squeeze the guide surface to move the sliding block upward.

[0014] The present invention also provides a sewing machine, comprising a machine body, a machine base and a machine head arranged on the machine base. The machine base and the machine head can be flipped and arranged on the upper side of the machine body. A cloth pressing mechanism is provided in the machine head, and the cloth pressing mechanism adopts the above-mentioned cloth pressing mechanism.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention, through the arrangement of the clutch and the driving member, enables the driving member to independently drive the first adjusting member and the second adjusting member to work by switching the clutch, so that when adjusting the pressure or lifting height of the presser foot, there is no need to disassemble the end cover, which is convenient for actual use.

[0016] 2. The present invention can adjust the inclination of the presser foot by rotating the screw to extend the screw into or out of the groove so as to keep it level. This adjustment operation is simple and convenient, and is beneficial to practical use. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The figure is a structural schematic diagram of a cloth pressing mechanism of a sewing machine in the present invention.

[0018] Figure 2 This is one of the cross-sectional schematic diagrams of the cloth pressing mechanism in the present invention.

[0019] Figure 3 This is the second structural diagram of the cloth pressing mechanism in the present invention.

[0020] Figure 4 It is a structural schematic diagram of the cloth pressing mechanism in the present invention.

[0021] Figure 5 It is a schematic diagram of the half-section matching structure between the clutch member and the driving member in the present invention.

[0022] Figure 6 It is a partial structural diagram of the adjustment component in the present invention.

[0023] Figure 7 This is a schematic diagram of the half-section structure of the first adjusting member on the presser foot rod in the present invention.

[0024] Figure 8 for Figure 2 Enlarged schematic diagram of part A.

[0025] Figure 9 It is a structural schematic diagram of the presser foot in the present invention.

[0026] Figure 10 It is a partial structural diagram of the sewing machine in the present invention.

[0027] The meaning of each number in the figure is: 10. Machine base; 20. Machine head; 21. End cover; 30. Needle plate; 100, presser foot; 110, presser foot rod; 120, needle bar; 121, clamping block; 130, adjustment box; 140, adjustment block; 150, sleeve rod; 151, gear column; 200, adjustment rod; 201, retaining ring; 202, plug hole; 210, first spring; 220, upper rotating cylinder; 230, lower rotating cylinder; 240, drive ring; 241, twisting column; 310, rotating shaft; 311, first driven gear; 312, second driven gear; 511, active ratchet; 521, lower driven ratchet; 522, connecting portion; 523, assembly groove; 531, gear; 532, upper driven ratchet; 540, third spring; 711, mounting groove; 810, presser foot handle; 811, mounting cavity; 820, presser foot plate; 821, hinge slot; 830, second spring; 840, sliding block; 850, hinge rod; 901, threaded barrel; 911, groove; 912, guide surface; 920, screwing nail. DETAILED DESCRIPTION

[0028] In order to further understand the content of the present invention, the present invention is described in detail with reference to the accompanying drawings and embodiments. It should be understood that the embodiments are merely for explaining the present invention and are not intended to limit the present invention.

[0029] The following is combined with Figures 1-10 This embodiment is described in further detail.

[0030] like Figure 1 As shown, a cloth pressing mechanism of a sewing machine in this embodiment includes a presser foot rod 110 and a needle bar 120 arranged in parallel in the machine head 20, a detachable presser foot 100 is provided at the lower end of the presser foot rod 110, and an adjustment component for adjusting the pressure and lifting height of the presser foot 100 is provided on the presser foot rod 110; The adjustment assembly includes an adjustment box 130, an adjustment rod 200 that is inserted into the upper end of the presser foot rod 110 and passes through the adjustment box 130, and the adjustment assembly also includes an adjustment block 140 that is sleeved on the presser foot rod 110 and the needle bar 120. A first adjustment member for driving the presser foot rod 110 and the adjustment block 140 to rise and fall as a whole is provided in the adjustment box 130, and a second adjustment member for driving the adjustment block 140 to rise and fall along the presser foot rod 110 is also provided in the adjustment box 130. The regulating box 130 is provided with a driving member extending therethrough. A clutch member is provided inside the regulating box 130 . The driving member is switched by the clutch member to enable the first regulating member or the second regulating member to work alone.

[0031] In actual use, this embodiment is combined with Figure 10 As shown, the cloth pressing mechanism is installed in the head 20 of the sewing machine, and the presser foot 100 on it cooperates with the needle plate 30 on the sewing machine base 10; Specifically, the presser foot bar 110 and the needle bar 120 are arranged at one end of the machine head 20, and the lower ends of both extend through the machine head 20, wherein the presser foot bar 110 is provided with a presser foot 100 at the lower end, and the needle bar 120 is provided with a needle at the lower end. In actual use, a driving structure for driving the needle bar 120 to reciprocate and rise is provided in the sewing machine, and at the same time, a switching structure for driving the presser foot bar 110 to be in an upward or downward state is provided in the machine head 20. The switching structure is an existing structure, which is 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; Specifically, a clamping block 121 is provided on the outer wall of the needle bar 120 and is located below the adjustment block 140. 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; When this embodiment is actually used, the needle rod 120 and the presser foot rod 110 are synchronously lowered to the lowest point. At this time, the adjustment block 140 is raised and lowered along the presser foot rod 110 to adjust the distance between it and the clamping block 121. When the presser foot rod 110 moves to the highest point, the distance between the presser foot 100 and the needle plate 30 can be adjusted, thereby adjusting the lifting height of the presser foot 100. It should be noted that when performing this adjustment on the existing sewing machine, the end cover 21 needs to be removed for operation.

[0032] In this embodiment, the driving member and the first adjusting member are arranged so that the driving member drives the first adjusting member to work, thereby realizing the lifting and lowering adjustment of the presser foot rod 110 and the adjusting block 140 as a whole, so as to adjust the pressure of the presser foot 100; specifically, when the presser foot 100 descends onto the needle plate 30, at this time, by adjusting the pressure of the presser foot 100, it is convenient for the presser foot 100 to press fabrics of different thicknesses, so that the fabrics pass through the presser foot 100; Among them, by setting the driving member and the second adjusting member, the driving member can enable the second adjusting member to work, and the adjusting block 140 can be lifted and lowered along the presser foot rod 110, thereby better adjusting the lifting height of the presser foot 100.

[0033] In this embodiment, by setting the clutch, in actual use, by switching the clutch, the driving member can drive the first adjusting member or the second adjusting member to work alone, so that when adjusting the pressure or lifting height of the presser foot 100, there is no need to disassemble the end cover 21, which is convenient for actual use.

[0034] Combine Figure 2-Figure 4As shown, in this embodiment, the first adjusting member includes a retaining ring 201 provided on the outside of the adjusting rod 200, and the outer cover of the adjusting rod 200 located below the retaining ring 201 is provided with a first spring 210 abutting against the presser foot rod 110. Specifically, the upper end of the presser foot rod 110 is provided with an inserting hole 202, and the lower end of the adjusting rod 200 extends into the inserting hole 202; The clutch member includes an upper rotating cylinder 220 and a lower rotating cylinder 230 rotatably arranged in the adjustment box 130. The adjustment rod 200 is threadedly arranged through the upper rotating cylinder 220 and the lower rotating cylinder 230. Specifically, the upper rotating cylinder 220 and the lower rotating cylinder 230 are rotatably mounted on the upper and lower side walls of the adjustment box 130 through bearings. Figure 5 As shown, a connecting portion 522 threadedly connected to the adjusting rod 200 is provided in the lower rotating cylinder 230 , and the lower rotating cylinder 230 rotates to drive the adjusting rod 200 to move up and down.

[0035] In this embodiment, by setting the first spring 210, in actual use, the upper end of the first spring 210 abuts the retaining ring 201, and the lower end abuts the upper end of the presser foot rod 110, so that the lower end portion of the adjusting rod 200 is extended into the insertion hole 202. In actual use, when the presser foot rod 110 is lowered and the presser foot 100 is driven 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. It should be noted that, in the present embodiment, a slide groove is provided on the side wall of the presser foot rod 110 along its axial direction, a mounting seat for the presser foot rod 110 to pass through is provided in the machine head 20, and a slider sliding in the slide groove is provided in the mounting seat, thereby restricting the presser foot rod 110 and preventing it from rotating in a circular direction; wherein, a recessed groove is provided on the outer wall of the adjusting rod 200 along its axial direction, and a protrusion sliding in the recessed groove is provided on the inner wall of the plug-in hole 202 along its axial direction, thereby forming a keyway fit between the two, so that the adjusting rod 200 is restricted and cannot rotate in a circular direction. At this time, since the connecting portion 522 is threadedly connected 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.

[0036] In this embodiment, the driving member includes a driving ring 240 that is sleeved on the outside of the adjustment rod 200 and located on the upper rotating cylinder 220 and the lower rotating cylinder 230. The driving ring 240 is provided with a twisting column 241 that extends through the adjustment box 130. Active ratchet teeth 511 are provided on the upper and lower sides of the driving ring 240. The upper end portion of the lower rotating cylinder 230 is provided with a lower driven ratchet 521 that cooperates with the corresponding active ratchet 511 .

[0037] When this embodiment is actually used, the driving ring 240 can be driven to rise and fall along the adjusting rod 200 by pulling the twisting column 241. Therefore, when the operator moves the twisting column 241 downward to drive the driving ring 240 downward, the active ratchet 511 at its lower end is engaged with the lower driven ratchet 521 to achieve cooperation between the two. At this time, by rotating the twisting column 241, the lower rotating cylinder 230 can be driven to rotate to adjust the pressure of the presser foot 100. The operation is simple and convenient.

[0038] In this embodiment, the second adjusting member includes a sleeve rod 150 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 via a bearing, wherein the lower end of the sleeve rod 150 is threadedly connected to the outer wall of the presser foot rod 110, and a gear column 151 is fixed to the upper end of the sleeve rod 150; A gear 531 is fixed on the outer wall of the upper rotating cylinder 220, and a rotating shaft 310 is provided in the adjusting box 130, which is located on both sides of the upper rotating cylinder 220 and the lower end of which extends out of the adjusting box 130. Specifically, the rotating shaft 310 is rotatably installed in the adjusting box 130 through a bearing, and 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 column 151.

[0039] Through the above-mentioned structure, this embodiment enables that when the upper rotating cylinder 220 rotates, the gear 531 and the first driven gear 311 cooperate to drive the rotating shaft 310 to rotate, and the second driven gear 312 and the gear column 151 are set to drive the sleeve rod 150 to rotate. At this time, under the action of the switching structure, the presser foot rod 110 is in a state of being lowered to the lowest end. At this time, due to the threaded connection between the sleeve rod 150 and the presser foot rod 110, the sleeve rod 150 can be rotated to drive it and the adjustment 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.

[0040] It should be noted that, in this embodiment, the adjustment box 130 is detachably mounted in the machine head 20 by screws. At this time, the upper end of the screw column 241 extends through the adjustment box 130 and the machine head 20 to facilitate the operator to perform lifting and rotating operations.

[0041] In this embodiment, in order to realize the rotation of the upper rotating cylinder 220, an upper driven ratchet 532 that cooperates with the corresponding active ratchet 511 is provided on the lower side wall of the upper rotating cylinder 220. Therefore, during actual operation, the operator lifts up the twisting column 241 so that the active ratchet 511 at its upper end is stuck 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 twisting column 241, which is simple and convenient to operate.

[0042] Specifically, in order to ensure that when not in use, the driving ring 240 does not move downward due to its own weight, so that the active ratchet 511 is stuck in the lower driven ratchet 521, causing the twisting column 241 to rotate incorrectly, that is, the pressure of the presser foot 100 is adjusted, affecting its use, in this embodiment, an assembly groove 523 is opened in the lower rotating cylinder 230, and a third spring 540 for pushing the driving ring 240 to move upward is installed in the assembly groove 523. The third spring 540 pushes the driving ring 240 to move upward to prevent the active ratchet 511 from being stuck in the lower driven ratchet 521.

[0043] Combine 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, a mounting groove 711 is provided at the lower end of the presser foot rod 110, and the presser foot 100 is installed in the mounting groove 711 by screws.

[0044] Combine 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. A hinge groove 821 is provided on the presser foot plate 820. The lower end of the presser foot handle 810 extends into the hinge groove 821. A hinge shaft passing through the presser foot handle 810 is provided in the hinge groove 821. The presser foot handle 810 is provided with an adjustment component for adjusting the inclination angle of the presser foot plate 820.

[0045] In this embodiment, the presser foot handle 810 is installed in the installation groove 711 to realize the installation of the presser foot 100 at the lower end of the presser foot rod 110, wherein the hinge shaft passes through the lower end of the presser foot handle 810, and the presser foot plate 820 can be hingedly installed at the lower end of the presser foot handle 810. In actual use, the presser foot plate 820 needs to be horizontally installed at the lower end of the presser foot handle 810, so that when the presser foot 100 is lowered onto the needle plate 30, the presser foot plate 820 is in a horizontal position, so that the cloth can pass between the presser foot plate 820 and the needle plate 30; Among them, by adjusting the setting of the component, it is possible to adjust the inclination angle of the presser foot 820, so that the presser foot 820 can be kept horizontal better, which is beneficial for actual use.

[0046] In this embodiment, a mounting cavity 811 with an opening at the lower end is provided in the presser foot handle 810, and the adjustment assembly includes a sliding block 840 arranged in the mounting cavity 811 through a second spring 830, and the lower end of the sliding block 840 forms a hinge portion, and the hinge portion is provided with a hinge rod 850 with one end hingedly connected to the hinge portion, and the other end of the hinge rod 850 is hingedly connected to the hinge groove 821. Specifically, a hinge shaft passing through one end of the hinge rod 850 is provided on the hinge portion, and a hinge shaft passing through the other end of the hinge rod 850 is also provided in the hinge groove 821, thereby realizing the hinged connection between the two ends of the hinge rod 850 in the sliding block 840 and the hinge groove 821, and the presser foot handle 810 is provided with an adjusting member for driving the sliding block 840 to rise and fall.

[0047] In this embodiment, a groove 911 is provided on one side surface of the sliding block 840, and a side wall of the groove 911 forms a guide surface 912; the adjusting member includes a screwing pin 920 threadedly connected to the presser foot handle 810, one end of the screwing pin 920 extends into the groove 911 and cooperates with the guide surface 912, and the screwing pin 920 extends into the groove 911 to squeeze the guide surface 912 to move the sliding block 840 upward.

[0048] The second spring 830 is pressed against the guide plate 840, and the second spring 830 is pressed against the guide plate 840, so that the second spring 830 is pressed against the guide plate 840, so that the second spring 830 is pressed against the guide plate 840, so that the second spring 830 is pressed against the guide plate 840, so that the second spring 830 is pressed against the guide plate 840, so that the second spring 830 is pressed against the guide plate 840, so that the second spring 830 is pressed against the guide plate 840, so that the second spring 830 is pressed against the guide plate 840, so that the second spring 830 is pressed against the guide plate 840, so that the second spring 830 is pressed against the guide plate 840, so that the second spring 830 is pressed against the guide plate 840, Among them, in order to better achieve the threaded cooperation between the turning pin 920 and the presser foot handle 810, the side wall of the presser foot handle 810 protrudes outward to form a threaded barrel 901 to increase the threaded connection distance between it and the turning pin 920, so that the threaded connection of the turning pin 920 on the presser foot handle 810 is more stable.

[0049] 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 head 20 arranged on the machine base 10, the machine base 10 and the head 20 can be flipped and arranged on the upper side of the machine body, and the above-mentioned cloth pressing mechanism is provided in the head 20.

[0050] When the pressure of the presser foot 100 needs to be adjusted, the presser foot rod 110 and the needle rod 120 are first lowered to the lowest point, and then the screwing column 241 is pressed downward so that the corresponding active ratchet 511 thereon is engaged with the lower driven ratchet 521, and then the pressure of the presser foot 100 can be adjusted by rotating the screwing column 241; when the lifting height of the presser foot 100 needs to be adjusted, the presser foot rod 110 and the needle rod 120 are first lowered to the lowest point, and then the screwing column 241 is lifted and moved upward so that the corresponding active ratchet 511 thereon is engaged with the upper driven ratchet 532, and then the lifting height of the presser foot 100 can be adjusted by rotating the screwing column 241; compared with the existing sewing machine, the sewing machine in this embodiment does not need to remove the end cover 21 when adjusting the lifting height of the presser foot 100, which is convenient for the actual use of the sewing machine.

[0051] In short, the above description is only a preferred embodiment of the present invention, and all equivalent changes and modifications made according to the scope of the patent application of the present invention should fall within the scope of the patent of the present invention.

Claims

1. A cloth pressing mechanism for a sewing machine, comprising a presser foot rod (110) and a needle bar (120) arranged in parallel in a machine head (20), wherein a detachable presser foot (100) is provided at the lower end of the presser foot rod (110), characterized in that: The presser foot rod (110) is provided with an adjustment component for adjusting the pressure and lifting height of the presser foot (100); The adjusting assembly comprises an adjusting box (130), an adjusting rod (200) which is arranged to penetrate the adjusting box (130) and is inserted at the upper end of the presser foot rod (110), and the adjusting assembly further comprises an adjusting block (140) which is sleeved on the presser foot rod (110) and the needle rod (120), a first adjusting member for driving the presser foot rod (110) and the adjusting block (140) to rise and fall as a whole is arranged in the adjusting box (130), and a second adjusting member for driving the adjusting block (140) to rise and fall along the presser foot rod (110) is also arranged in the adjusting box (130); The regulating box (130) is provided with a driving member extending therethrough, and a clutch member is provided in the regulating box (130). The driving member is switched by the clutch member to enable the first regulating member or the second regulating member to work independently.

2. The cloth pressing mechanism for a sewing machine according to claim 1, characterized in that: The first adjusting member comprises a retaining ring (201) provided outside the adjusting rod (200); the outer cover of the adjusting rod (200) located below the retaining ring (201) is provided with a first spring (210) abutting against the presser foot rod (110); The clutch member comprises an upper rotating cylinder (220) and a lower rotating cylinder (230) rotatably arranged in the adjustment box (130); the adjustment rod (200) is threadedly penetrated through the upper rotating cylinder (220) and the lower rotating cylinder (230); a connecting portion (522) threadedly connected to the adjustment rod (200) is provided in the lower rotating cylinder (230); and the lower rotating cylinder (230) is rotated to drive the adjustment rod (200) to rise and fall.

3. The cloth pressing mechanism for a sewing machine according to claim 2, characterized in that: The driving member includes a driving ring (240) which is sleeved outside the adjusting rod (200) and is located on the upper rotating cylinder (220) and the lower rotating cylinder (230); the driving ring (240) is provided with a twisting column (241) which extends through the adjusting box (130); and active ratchets (511) are provided on the upper and lower sides of the driving ring (240); The upper end portion of the lower rotating cylinder (230) is provided with a lower driven ratchet (521) that matches the corresponding active ratchet (511).

4. The cloth pressing mechanism for a sewing machine according to claim 2, characterized in that: The second adjusting member comprises a sleeve rod (150) rotatably mounted on the adjusting block (140) and sleeved outside the adjusting rod (200), the lower end of the sleeve rod (150) being threadedly connected to the outer wall of the presser foot rod (110), and the upper end of the sleeve rod (150) being provided with a gear column (151); A gear (531) is provided on the outer wall of the upper rotating cylinder (220), and a rotating shaft (310) is provided in the regulating box (130), which is located on both sides of the upper rotating cylinder (220) and has a lower end extending outside the regulating box (130). The rotating shaft (310) is provided with a first driven gear (311) meshing with the gear (531), and the lower end of the rotating shaft (310) is provided with a second driven gear (312) meshing with the gear column (151).

5. The cloth pressing mechanism for a sewing machine according to claim 4, characterized in that: An upper driven ratchet (532) that matches the corresponding active ratchet (511) is provided on the lower side wall of the upper rotating cylinder (220).

6. The cloth pressing mechanism for a sewing machine 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 mounted in the mounting groove (711) by means of screws.

7. The cloth pressing mechanism for a sewing machine according to claim 6, characterized in that: The presser foot (100) comprises a presser foot handle (810) and a presser foot plate (820), wherein a hinge groove (821) is provided on the presser foot plate (820), the lower end of the presser foot handle (810) extends into the hinge groove (821), a hinge shaft passing through the presser foot handle (810) is provided in the hinge groove (821), and an adjustment component for adjusting the inclination angle of the presser foot plate (820) is provided on the presser foot handle (810).

8. The cloth pressing mechanism for a sewing machine according to claim 7, characterized in that: The presser foot handle (810) is provided with a mounting cavity (811) with an opening at the lower end. The adjustment assembly includes a sliding block (840) arranged 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 is provided with a hinge rod (850) having one end hingedly connected to the hinge portion. The other end of the hinge rod (850) is hingedly connected to the hinge groove (821). The presser foot handle (810) is provided with an adjustment member for driving the sliding block (840) to rise and fall.

9. The cloth pressing mechanism for a sewing machine according to claim 8, characterized in that: A groove (911) is provided on one side surface of the sliding block (840), and a side wall of the groove (911) forms a guide surface (912); the adjusting member includes a screwing pin (920) threadedly connected to the presser foot handle (810), one end of the screwing pin (920) extends into the groove (911) and cooperates with the guide surface (912), and the screwing pin (920) extends into the groove (911) to squeeze the guide surface (912) so that the sliding block (840) moves upward.

10. A sewing machine comprising a machine body, a machine base (10) and a machine head (20) arranged on the machine base (10), wherein the machine base (10) and the machine head (20) can be turned over and arranged on the upper side of the machine body, characterized in that: A cloth pressing mechanism is provided in the machine head (20), and the cloth pressing mechanism adopts the cloth pressing mechanism as claimed in any one of claims 1 to 9.

Images