The presser foot mechanism of a sewing machine and the sewing machine

Abstract

This application discloses a presser foot mechanism for a sewing machine and a sewing machine. The presser foot mechanism includes a presser foot with a connecting part and a pressing part. The pressing part has a through hole in its body in a first direction perpendicular to the sewing machine table. The needle of the sewing machine is coaxial with the through hole and can reciprocate along the first direction. When the needle moves, the presser foot and the needle move synchronously, and when the needle moves towards the sewing machine table along the first direction, the pressing part reaches the sewing machine table before the end of the needle. This disclosure can effectively adjust the synchronous speed of the presser foot, preventing skipped stitches and fabric spillage during high-speed sewing.

Description

Technical Field

[0001] This application relates to the field of sewing machine technology, and more particularly to a presser foot mechanism for a sewing machine and a sewing machine. Background Technology

[0002] In the textile industry, including garment processing and home textile production, sewing machines are core sewing equipment, and the performance of their presser foot mechanism directly affects sewing accuracy, fabric stability, and processing efficiency. As a key component of the sewing machine, the presser foot's main function is to tightly press the fabric together during the sewing process, preventing the fabric from shifting, wrinkling, or slipping when the needle pierces and the stitches are formed, thus ensuring even and continuous stitches.

[0003] Traditional sewing machine presser foot mechanisms typically employ mechanical linkages to achieve lifting and lowering movements, relying on simple cam or linkage transmission structures for coordination between the presser foot and needle. However, current technology suffers from insufficient synchronization precision between the presser foot and needle, often resulting in the presser foot lagging behind the needle's descent or rising prematurely. When the needle pierces the fabric, if the presser foot fails to compress the fabric promptly, localized displacement of the fabric under impact can lead to quality issues such as skipped stitches, broken threads, and skewed stitches. These defects are particularly pronounced when sewing thin or elastic fabrics. Utility Model Content

[0004] The purpose of this utility model embodiment is to provide a presser foot mechanism for a sewing machine and a sewing machine that can solve the above-mentioned problems existing in the prior art.

[0005] To achieve the above objectives, this application adopts the following technical solution: On the one hand, a presser foot mechanism for a sewing machine is provided, comprising: The presser foot includes a connecting part and a pressing part. The pressing part has a through hole in its body in a first direction perpendicular to the sewing machine table. The needle of the sewing machine is coaxial with the through hole and can reciprocate along the first direction. Specifically, when the needle moves, the presser foot and the needle move synchronously, and when the needle moves toward the sewing machine table along the first direction, the pressing part reaches the sewing machine table before the end of the needle.

[0006] Preferably, the sewing machine is provided with a housing, the housing including a first connecting end connected to the sewing machine table and a second connecting end suspended in the air; The second connecting end is slidably connected to a first connecting rod and a second connecting rod along the first direction; and The presser foot is connected to the first connecting rod, and the needle is connected to the second connecting rod.

[0007] Preferably, it further includes a transmission mechanism for connecting the presser foot and the main power shaft of the sewing machine, the main power shaft being used to drive the needle to reciprocate, the transmission mechanism comprising: An L-shaped connecting block has a first connecting rod hinged at one end and a second connecting rod hinged at the other end, and the middle part of the L-shaped connecting block is hinged to an adjusting rod. The third link has one end hinged to the second link and the other end fixedly connected to a drive shaft; The drive shaft is connected to the active force shaft, and the drive shaft can oscillate back and forth between a first position and a second position as the active force shaft rotates.

[0008] Preferably, a sliding groove is formed inside the housing along the first direction, and a slider is slidably connected in the sliding groove; The slider is fixedly connected to the first connecting rod, and the first connecting rod is hinged to the slider.

[0009] Preferably, it further includes an adjustment mechanism connected to the transmission mechanism via the adjustment rod, the adjustment mechanism comprising: An adjustment motor is located on the outside of the housing, and an adjustment wheel is fixedly connected to the main shaft of the adjustment motor. An arc-shaped adjustment surface is provided on the adjustment wheel, and the adjustment surface is eccentrically set with respect to the axis of the main shaft. A rotating wheel is rotatably connected to the other end of the adjusting rod, and the rotating wheel is connected to the adjusting surface; The adjusting rod is rotatably connected to a fixed shaft in the middle, and the fixed shaft and the housing are relatively fixed to each other.

[0010] Preferably, it also includes a first connecting frame, which is fixedly connected to the housing; The first connecting frame is provided with a first connecting panel, and a first connecting hole and a second connecting hole are provided on the first connecting panel; The drive shaft is rotatably connected to the first connecting hole; and The regulating motor is fixedly connected to the first connecting panel, and the main shaft of the regulating motor is rotatably disposed in the second connecting hole.

[0011] Preferably, the fixed shaft is fixedly connected to the first connecting panel.

[0012] Preferably, an elastic member is connected between the adjusting rod and the housing, and the elastic member applies a first driving force to the adjusting rod in the first direction.

[0013] Preferably, an eccentric wheel is connected to the main drive shaft, and a fourth connecting rod is rotatably sleeved around the eccentric wheel; The other end of the fourth link is hinged to a fifth link, and the fifth link is fixedly connected to the drive shaft.

[0014] On the other hand, this disclosure also provides a sewing machine that includes a presser foot mechanism as described in any of the above sewing machines.

[0015] The beneficial effects of this application are as follows: 1. By constructing a synchronous motion logic of "presser foot pre-pressing – needle precise puncture," the core pain points of traditional mechanisms are solved. The design of the presser foot pressing part arriving at the table before the needle can firmly fix the fabric in advance during sewing, completely avoiding problems such as skipped stitches, broken threads, and crooked stitches caused by fabric displacement. Especially for lightweight fabrics, elastic fabrics, and other easily slipping materials, it can significantly reduce the risk of wrinkling, ensure even and continuous stitches, and greatly improve the stability and consistency of sewing quality, providing a core guarantee for high-quality sewing.

[0016] 2. By sharing the main drive shaft and the double crank connecting rod mechanism, the same source of power drive is achieved, avoiding synchronization deviation of multiple power sources; the sliding structure of the second connection end provides rigid guidance for the first and second connecting rods, and combined with the cooperation of the housing slide groove and the slider, it limits the lateral offset of the presser foot and the needle, ensuring accurate motion trajectory; the hinged cooperation between the L-shaped connecting block and the adjusting rod provides a stable motion transmission path for the transmission system, reduces phase deviation caused by component wear, and ensures long-term operational stability.

[0017] 3. By adjusting the eccentric adjustment wheel driven by the motor, the minimum height of the presser foot from the table can be precisely adjusted to meet the pressing needs of fabrics of different thicknesses, such as thin yarns, thick leathers, and multi-layered fabrics, avoiding fabric damage or instability caused by a fixed height. The swing characteristic of the adjustment rod with a fixed axis as the fulcrum, combined with the pre-tightening force of the elastic component, can dynamically fine-tune the time interval of the presser foot's pre-pressing, adapting to different sewing speeds and fabric characteristics, significantly expanding the application scenarios of the equipment. Attached Figure Description

[0018] The present application will now be described in further detail with reference to the accompanying drawings and embodiments.

[0019] Figure 1 This is a schematic diagram of the structure of a sewing machine according to an embodiment of this application; Figure 2 This is a schematic diagram of the structure behind the concealed housing of a sewing machine according to an embodiment of this application; Figure 3 This is a partial structural diagram of a sewing machine according to an embodiment of this application; Figure 4 for Figure 3 A schematic diagram of the structure viewed from the center; Figure 5This is a partial structural diagram of the internal structure of the sewing machine casing according to an embodiment of this application; Figure 6 This is a schematic diagram of the drive shaft, main power shaft, and part of the structure of a sewing machine according to an embodiment of this application; Figure 7 for Figure 6 A structural diagram from another perspective; Figure 8 This is a schematic diagram of the adjustment mechanism and the transmission connection structure between the drive shaft and the first connecting shaft of the sewing machine according to an embodiment of this application; Figure 9 This is a schematic diagram of the transmission connection between the main power shaft and the drive shaft of a sewing machine according to an embodiment of this application.

[0020] In the picture: 10. First direction; 111. Sewing machine table; 120. Housing; 1201. Slide groove; 121. First connecting end; 122. Second connecting end; 130. First connecting rod; 131. Slider; 140. Second connecting rod; 150. First connecting bracket; 1501. First connecting panel; 1502. First connecting hole; 1503. Second connecting hole; 210. Needle; 221. Drive motor; 222. Main drive shaft; 230. Drive shaft; 231. Second crank-connecting rod mechanism; 2311. Eccentric wheel; 2312. Fourth connecting rod; 2313. Fifth connecting rod; 240. L-shaped connecting block; 251. First link; 252. Second link; 253. Third link; 300, Presser foot; 310, Connecting part; 320, Crimping part; 321, Through hole; 400. Adjusting motor; 410. Adjusting rod; 411. Rotating wheel; 412. Adjusting wheel; 500. Elastic components. Detailed Implementation

[0021] To make the technical problems solved by this application, the technical solutions adopted, and the technical effects achieved clearer, the technical solutions of the embodiments of this application are further described in detail below. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0022] In the description of this application, unless otherwise expressly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0023] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0024] Please see Figures 1 to 9 This disclosure provides a sewing machine including a presser foot mechanism. The presser foot mechanism provided by this disclosure can adjust the synchronous speed of the presser foot 300, so that high-speed sewing does not skip stitches or rush the fabric.

[0025] Specifically, the presser foot mechanism of the sewing machine provided in this disclosure includes a presser foot 300, which is provided with a connecting part 310 and a pressing part 320. The pressing part 320 has a through hole 321 extending through its body in a first direction 10 perpendicular to the sewing machine table 111. The sewing machine needle 210 is coaxial with the through hole 321, and the needle 210 can reciprocate along the first direction 10. When the needle 210 moves, the presser foot 300 and the needle 210 move synchronously, and when the needle 210 moves towards the sewing machine table 111 along the first direction 10, the pressing part 320 reaches the sewing machine table 111 before the end of the needle 210. Therefore, when the sewing machine is working, the fabric is pressed onto the sewing machine table 111 in advance by the pressing part 320 of the presser foot 300, and then the needle 210 performs the needle insertion action, which effectively ensures that the fabric is in a stable state when the needle 210 inserts the needle.

[0026] Understandably, by setting a precise synchronous movement mechanism between the presser foot 300 and the needle 210, the pressing part 320 is ensured to arrive at the sewing machine table 111 before the end of the needle 210, realizing the "press before sewing" action logic. Before the needle 210 pierces the fabric, the pressing part 320 firmly fixes the fabric to the table in advance, fundamentally avoiding the fabric displacement problem caused by the lag of the presser foot 300 in traditional mechanisms. This effectively solves common sewing defects such as skipped stitches, broken threads, and skewed stitches. Especially when sewing thin or elastic fabrics, it can significantly reduce the risk of fabric wrinkling and slippage, ensure uniform and continuous stitches, and greatly improve the stability of sewing quality.

[0027] Furthermore, the sewing machine provided in this disclosure also includes a housing 120, which is connected to the sewing machine table 111. The housing 120 includes a first connecting end 121 connected to the sewing machine table 111 and a second connecting end 122 suspended in the air. The needle 210 and the presser foot 300 are both located at the second connecting end 122, allowing fabric to pass through the suspended area between the second connecting end 122 and the sewing machine table 111.

[0028] Understandably, the suspended area formed between the second connecting end 122 of the housing 120 and the sewing machine table 111 provides ample space for the fabric to pass through, effectively avoiding the problem of fabric transport obstruction caused by parts blocking the fabric in traditional mechanisms.

[0029] In one embodiment, a first connecting rod 130 and a second connecting rod 140 are slidably connected to a second connecting end 122 along a first direction 10. The connecting portion 310 of the presser foot 300 is connected to the first connecting rod 130, and the needle 210 is connected to the second connecting rod 140. Therefore, by sliding the first connecting rod 130 and the second connecting rod 140, the needle 210 and the presser foot 300 can reciprocate along the first direction 10. The second connecting end 122, through a sliding structure, connects the first connecting rod 130 and the second connecting rod 140, providing precise guiding constraints for the reciprocating motion of the presser foot 300 and the needle 210. The sliding connection design along the first direction 10 effectively reduces lateral sway and offset during movement, ensuring that the presser foot 300 and the needle 210 always run stably along a preset trajectory during lifting and lowering, improving the straightness and repeatability of their movements, and providing a structural basis for the "presser foot first, then sew" sequence logic.

[0030] It is important to note that the presser foot 300 and the needle 210 are connected in a follower configuration, and they share a common power source. This effectively reduces the number of power sources and transmission components, lowering manufacturing costs and assembly complexity. Furthermore, sharing a power source avoids motion lag or misalignment issues caused by differences in synchronization between multiple power sources.

[0031] Specifically, a drive motor 221 is installed inside the housing 120, and a drive shaft 222 is fixedly connected to the main shaft of the drive motor 221. A drive shaft 230, parallel to the drive shaft 222, is installed outside the housing 120 and connected to the first connecting rod 130. The drive shaft 222 is driven by a second connecting rod 140, and there is a transmission connection between the drive shaft 230 and the drive shaft 222. Therefore, when the drive motor 221 drives the drive shaft 222 to rotate, it can synchronously drive the drive shaft 230 to rotate, thereby achieving synchronous driving of the presser foot 300 and the needle 210.

[0032] The sewing machine provided in this disclosure also includes a transmission mechanism for connecting the presser foot 300 and the main power shaft 222 of the sewing machine.

[0033] Specifically, a first crank-connecting rod mechanism is provided between the main power shaft 222 and the second connecting rod 140, and a second crank-connecting rod mechanism 231 is provided between the main power shaft 222 and the drive shaft 230. Therefore, when the main power shaft 222 rotates, it can synchronously drive the second connecting rod 140 and the drive shaft 230 to move. By setting the first crank-connecting rod mechanism and the second crank-connecting rod mechanism 231, the main power shaft 222 can synchronously drive the second connecting rod 140 and the drive shaft 230 to move, realizing the same power control for the presser foot 300 and the needle 210.

[0034] Furthermore, the transmission mechanism includes an L-shaped connecting block 240, a first connecting rod 251, a second connecting rod 252, and a third connecting rod 253.

[0035] One end of the L-shaped connecting block 240 is hinged to the first connecting rod 251, and the other end is hinged to the second connecting rod 252. The middle portion of the L-shaped connecting block 240 is hinged to an adjusting rod 410. A fixed shaft is fixedly connected to the middle portion of the adjusting rod 410, and this fixed shaft is relatively fixed relative to the housing 120. Therefore, the first mounting end on one side of the adjusting rod 410 and the second mounting end on the other side can swing between a first adjusting position and a second adjusting position. One end of the third connecting rod 253 is hinged to the second connecting rod 252, and the other end is fixedly connected to the drive shaft 230. The drive shaft 230 is drively connected to the main force shaft 222, and the drive shaft 230 can reciprocate between the first and second positions as the main force shaft 222 rotates.

[0036] Therefore, the hinged structure between the L-shaped connecting block 240 and the adjusting rod 410 provides the transmission system with a certain margin for motion adjustment. The swing characteristic of the adjusting rod 410 with a fixed axis as the fulcrum can be used to fine-tune the movement phase of the presser foot 300 through a subsequent adjustment mechanism, so that the time interval for the presser foot 300 to press in advance can be dynamically adapted according to parameters such as fabric type and sewing speed.

[0037] Specifically, the second crank-connecting rod mechanism 231 includes an eccentric wheel 2311 connected to the drive shaft 222, a fourth connecting rod 2312 rotatably sleeved around the eccentric wheel 2311, and a fifth connecting rod 2313 hinged to the other end of the fourth connecting rod 2312. The fifth connecting rod 2313 is fixedly connected to the drive shaft 230.

[0038] Understandably, the rotatable connection between the eccentric wheel 2311 and the fourth connecting rod 2312 in the second crank-connecting rod mechanism 231, combined with the articulated transmission of the multi-link, achieves an efficient conversion from the rotational motion of the main power shaft 222 to the reciprocating oscillation of the drive shaft 230. This transmission method reduces energy loss during power transmission, allowing the driving force to act more directly on the moving components of the presser foot 300 and the needle 210.

[0039] Therefore, when the main drive shaft 222 rotates, the second crank-connecting rod mechanism 231 drives the drive shaft 230 and the third connecting rod 253 to swing, thereby causing the third connecting rod 253 to drive the L-shaped connecting block 240 to swing through the second connecting rod 252.

[0040] Furthermore, a groove 1201 is formed within the housing 120 along the first direction 10, and a slider 131 is slidably connected within the groove 1201. The slider 131 is fixedly connected to the first connecting rod 130, and the first connecting rod 251 is hinged to the slider 131. By providing the groove 1201 along the first direction 10, the slider 131 connected to the first connecting rod 130 is slidably positioned within the groove 1201, effectively improving the stability of the first connecting rod 130 during sliding. Simultaneously, the sliding fit structure between the groove 1201 and the slider 131 within the housing 120 along the first direction 10 provides rigid guiding constraints for the lifting and lowering movement of the first connecting rod 130. The fixed connection between the slider 131 and the first connecting rod 130 effectively limits the lateral offset or wobbling of the pressure foot 300 during movement, ensuring that the pressing part 320 always moves precisely in a direction perpendicular to the table surface.

[0041] In one embodiment, the sewing machine provided in this disclosure further includes an adjustment mechanism, which allows adjustment of the specific position of the adjustment rod 410 between a first adjustment position and a second adjustment position. Since the L-shaped connecting block 240 is connected to the adjustment rod 410, when the adjustment mechanism drives the adjustment rod 410 to adjust its position, the rotation center of the L-shaped connecting block 240 is shifted. When the rotation center of the L-shaped connecting block 240 shifts, the position of the first connecting rod 130 in the first direction 10 is simultaneously changed. Therefore, the actual height of the L-shaped connecting block 240 can be adjusted according to actual needs, thereby adjusting the minimum distance between the presser foot 300 and the sewing machine table 111.

[0042] Furthermore, the adjustment mechanism includes an adjustment motor 400, which is located on the outside of the housing 120. An adjustment wheel 412 is fixedly connected to the main shaft of the adjustment motor 400. The adjustment wheel 412 has an arc-shaped adjustment surface, which is eccentrically positioned relative to the axis of the main shaft. A rotating wheel 411 is rotatably connected to the other end of the adjustment rod 410, and the rotating wheel 411 is connected to the adjustment surface. A fixed shaft is rotatably connected to the middle of the adjustment rod 410, and the fixed shaft and the housing 120 are relatively fixed to each other.

[0043] Specifically, the adjustment mechanism drives the eccentrically positioned adjustment wheel 412 to rotate via the adjustment motor 400. The arc-shaped adjustment surface of the adjustment wheel 412, in conjunction with the rotating wheel 411 on the adjustment rod 410, causes the adjustment rod 410 to swing around a fixed axis, thereby changing the rotation center position of the L-shaped connecting block 240 and ultimately adjusting the position of the first connecting rod 130 in the first direction 10. This design precisely controls the minimum distance between the presser foot 300 and the sewing machine table 111, allowing for flexible adjustment of the initial height of the presser foot 300 according to different fabric thicknesses. This avoids problems such as excessively tight pressing damaging the fabric or excessively loose pressing leading to instability due to a fixed height, significantly improving the equipment's adaptability to diverse sewing scenarios.

[0044] Furthermore, a first connecting bracket 150 is also connected to the housing 120, and is fixedly connected to the housing 120. The first connecting bracket 150 is provided with a first connecting panel 1501, which has a first connecting hole 1502 and a second connecting hole 1503. The drive shaft 230 is rotatably connected to the first connecting hole 1502; the adjusting motor 400 is fixedly connected to the first connecting panel 1501, and the main shaft of the adjusting motor 400 is rotatably disposed within the second connecting hole 1503. Simultaneously, a fixed shaft is fixedly connected to the first connecting panel 1501. The integrated design of the first connecting bracket 150 and the first connecting panel 1501 integrates the core components such as the drive shaft 230, the adjusting motor 400, and the fixed shaft onto the same panel, achieving a compact layout of the adjusting mechanism and transmission system, effectively saving installation space inside the housing 120.

[0045] In one embodiment, an elastic member 500 is connected between the adjusting rod 410 and the housing 120. The elastic member 500 applies a first driving force to the adjusting rod 410 in a first direction 10. The first driving force acts on the adjusting rod 410, keeping the adjusting rod 410 in a stable state.

[0046] The elastic component 500, which connects the adjusting rod 410 to the housing 120, applies a continuous first driving force in the first direction 10, ensuring that the adjusting rod 410 remains in close contact with the adjusting surface of the adjusting wheel 412, thus eliminating adjustment lag or wobbling problems that may be caused by transmission backlash. This preload design ensures that power is accurately transmitted to the adjusting rod 410 when the adjusting wheel 412 rotates, making the height adjustment process of the presser foot 300 smoother and more stable. In addition, the elastic component 500 can also buffer vibration and impact during the sewing process, reduce wear and tear on the adjusting components, extend the service life of the mechanism, and ensure consistent adjustment accuracy after long-term use.

[0047] In summary, this disclosure provides a presser foot mechanism and a sewing machine, which solves the core pain points of traditional mechanisms by constructing a synchronous motion logic of "presser foot 300 pre-pressing – needle 210 precise piercing". The design of the presser foot 300's pressing part 320 arriving at the worktable before the needle 210 can firmly fix the fabric in advance during sewing, completely avoiding problems such as skipped stitches, broken threads, and skewed stitches caused by fabric displacement. Especially for lightweight fabrics, elastic fabrics, and other easily slipping materials, it can significantly reduce the risk of wrinkling, ensure even and continuous stitches, and greatly improve the stability and consistency of sewing quality, providing a core guarantee for high-quality sewing.

[0048] The system achieves homogeneous power drive by sharing the main drive shaft 222 and the double crank connecting rod mechanism, avoiding synchronization deviations from multiple power sources. The sliding structure of the second connecting end 122 provides rigid guidance for the first and second connecting rods 140. Combined with the cooperation of the housing 120 slide groove 1201 and the slider 131, it limits the lateral offset of the presser foot 300 and the needle 210, ensuring accurate motion trajectory. The hinged cooperation between the L-shaped connecting block 240 and the adjusting rod 410 provides a stable motion transmission path for the transmission system, reduces phase deviations caused by component wear, and ensures long-term operational stability.

[0049] By adjusting the eccentric adjusting wheel 412 driven by the motor 400, the minimum height of the presser foot 300 from the table can be precisely adjusted to meet the pressing needs of fabrics of different thicknesses, such as thin yarn, thick leather, and multi-layered fabrics, avoiding fabric damage or instability caused by a fixed height. The swing characteristic of the adjusting rod 410 with the fixed axis as the fulcrum, combined with the pre-tightening force of the elastic component 500, can dynamically fine-tune the time interval of the presser foot 300's pre-pressing, adapting to different sewing speeds and fabric characteristics, and significantly expanding the application scenarios of the equipment.

[0050] In the description herein, it should be understood that the terms "upper," "lower," "left," "right," and other orientations or positional relationships are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used merely for descriptive distinction and have no special meaning.

[0051] In the description of this specification, references to terms such as "an embodiment," "example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0052] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style of the specification is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0053] The technical principles of this application have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of this application and should not be construed as limiting the scope of protection of this application in any way. Based on this explanation, those skilled in the art can readily conceive of other specific embodiments of this application without inventive effort, and these embodiments will all fall within the scope of protection of this application.

Claims

1. The presser foot mechanism of a sewing machine, characterized in that, include: The presser foot (300) includes a connecting part (310) and a pressing part (320). The pressing part (320) has a through hole (321) in a first direction (10) perpendicular to the sewing machine table (111) and passes through its body. The needle (210) of the sewing machine is coaxial with the through hole (321) and the needle (210) can reciprocate along the first direction (10). When the needle (210) moves, the presser foot (300) and the needle (210) move synchronously, and when the needle (210) moves toward the sewing machine table (111) along the first direction (10), the pressing part (320) reaches the sewing machine table (111) before the end of the needle (210).

2. The presser foot mechanism of the sewing machine according to claim 1, characterized in that, The sewing machine is provided with a housing (111), the housing (111) includes a first connecting end (121) connected to the sewing machine table (111) and a second connecting end (122) suspended in the air. The second connecting end (122) is slidably connected to a first connecting rod (130) and a second connecting rod (140) along the first direction (10); and The connecting part (310) of the presser foot (300) is connected to the first connecting rod (130), and the needle (210) is connected to the second connecting rod (140).

3. The presser foot mechanism of the sewing machine according to claim 2, characterized in that, It also includes a transmission mechanism for connecting the presser foot (300) and the main power shaft (222) of the sewing machine, the main power shaft (222) for driving the needle (210) to reciprocate, the transmission mechanism comprising: The L-shaped connecting block (240) has a first connecting rod (251) hinged at one end and a second connecting rod (252) hinged at the other end, and the middle part of the L-shaped connecting block (240) is hinged to an adjusting rod (410). The third link (253) has one end hinged to the second link (252) and the other end fixedly connected to the drive shaft (230). The drive shaft (230) is connected to the active force shaft (222), and the drive shaft (230) can swing back and forth between the first position and the second position as the active force shaft (222) rotates.

4. The presser foot mechanism of the sewing machine according to claim 3, characterized in that, The housing (111) has a sliding groove (1201) along the first direction (10) and a slider (131) is slidably connected in the sliding groove (1201). The slider (131) is fixedly connected to the first connecting rod (130), and the first connecting rod (251) is hinged to the slider (131).

5. The presser foot mechanism of the sewing machine according to claim 4, characterized in that, It also includes an adjustment mechanism, which is connected to the transmission mechanism via the adjustment rod (410), the adjustment mechanism comprising: An adjustment motor (400) is located on the outside of the housing (111), and an adjustment wheel (412) is fixedly connected to the main shaft of the adjustment motor (400). An arc-shaped adjustment surface is provided on the adjustment wheel (412), and the adjustment surface is eccentrically set with respect to the axis of the main shaft. A rotating wheel (411) is rotatably connected to the other end of the adjusting rod (410), and the rotating wheel (411) is connected to the adjusting surface; The adjusting rod (410) is rotatably connected to a fixed shaft in the middle, and the fixed shaft and the housing (111) are relatively fixed together.

6. The presser foot mechanism of the sewing machine according to claim 5, characterized in that, It also includes a first connecting frame (150), which is fixedly connected to the housing (111). The first connecting frame (150) is provided with a first connecting panel (1501), and a first connecting hole (1502) and a second connecting hole (1503) are provided on the first connecting panel (1501). The drive shaft (230) is rotatably connected to the first connecting hole (1502); and The regulating motor (400) is fixedly connected to the first connecting panel (1501), and the main shaft of the regulating motor (400) is rotatably disposed in the second connecting hole (1503).

7. The presser foot mechanism of the sewing machine according to claim 6, characterized in that, The fixed shaft is fixedly connected to the first connecting panel (1501).

8. The presser foot mechanism of the sewing machine according to claim 3, characterized in that, An elastic member (500) is connected between the adjusting rod (410) and the housing (111), and the elastic member (500) applies a first driving force to the adjusting rod (410) in the first direction (10).

9. The presser foot mechanism of the sewing machine according to claim 3, characterized in that, An eccentric wheel (2311) is connected to the drive shaft (222), and a fourth connecting rod (2312) is rotatably sleeved around the eccentric wheel (2311). The other end of the fourth link (2312) is hinged to a fifth link (2313), and the fifth link (2313) is fixedly connected to the drive shaft (230).

10. A sewing machine, characterized in that, Includes the presser foot mechanism of a sewing machine as described in any one of claims 1 to 9 above.

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