Embroidery machine head assembly and embroidery machine

Abstract

Embodiments of the present application disclose an embroidery machine head assembly and an embroidery machine. The embroidery machine head assembly comprises a needle bar assembly including a needle bar and a needle mounted on the lower end of the needle bar; the needle bar is configured to move in the vertical direction to drive the needle to lift and fall; a presser foot assembly including a connecting rod and a presser foot; the connecting rod is sleeved on the needle bar; the lower end of the connecting rod is connected with the presser foot; the presser foot is arranged around the needle and is in a non-closed ring shape or a special-shaped ring shape; the connecting rod is configured to move in the vertical direction along with the needle bar, and when the presser foot contacts a work surface, the needle bar can drive the needle to move relative to the connecting rod; a rotating assembly connected with the connecting rod; the rotating assembly is configured to drive the connecting rod to rotate around the needle bar, so as to drive the presser foot to rotate around the needle. Through the embodiments of the present application, the technical problem of how to consider both stable pressing and displacement prevention and avoid indentation damage of the part not resistant to pressure is solved.

Description

Technical Field

[0001] This application relates to the field of embroidery equipment, and more particularly to an embroidery machine head assembly and an embroidery machine. Background Technology

[0002] Computerized embroidery equipment is widely used in the embroidery processing of fabrics such as clothing, home textiles, bags, and handicrafts. The presser foot, as the core actuator of the embroidery machine head, continuously presses the fabric during the embroidery process to prevent the needle from lifting the fabric, avoiding stitch misalignment, skipped stitches, and pattern deformation. It is a key structure for ensuring embroidery quality. Currently, mainstream embroidery presser feet in the industry adopt a complete circular integrated structure. A typical circular presser foot covers a radius of 3-5mm around the stitch, relying on a spring on the needle bar to provide downward pressure. It synchronously completes the lifting and pressing action with the needle bar, making it suitable for mass production of conventional embroidery on ordinary flat woven and knitted fabrics.

[0003] With the popularization of techniques such as 3D embroidery, raised fabrics, plush fabrics, raised patterns with bubble printing / offset printing, and 3D filled embroidery, the shortcomings of existing full-circle presser feet are becoming increasingly apparent. Full-circle presser feet have a large contact area with the fabric, and during embroidery, the entire circle continuously presses against the raised areas of the fabric. These raised materials are often made of materials that are not pressure-resistant, such as sponge, foam, plush, and soft rubber. Prolonged heavy pressure can easily lead to permanent cosmetic defects such as dents, indentations, deformation, and flattened fibers, significantly reducing the yield rate of finished products. To avoid pressure damage, factories can only modify the embroidery layout, moving the stitch area away from the raised structure of the fabric, greatly reducing the design range of the embroidery pattern, limiting the product's visual appeal, and making it impossible to achieve full coverage embroidery of the raised areas, thus hindering the development of high-end 3D embroidery products. Summary of the Invention

[0004] This application aims to solve at least one of the technical problems existing in the prior art. To this end, this application proposes an embroidery machine head assembly and an embroidery machine, solving the technical problem of how to balance stabilizing the fabric to prevent displacement and avoiding indentation damage to pressure-sensitive areas.

[0005] In a first aspect, this application provides an embroidery machine head assembly, comprising: A needle bar assembly includes a needle bar and a needle mounted at the lower end of the needle bar; the needle bar is configured to move vertically to drive the needle to rise and fall. A presser foot assembly includes a connecting rod and a presser foot; the connecting rod is sleeved on the needle bar; the lower end of the connecting rod is connected to the presser foot; the presser foot is disposed on the outer periphery of the needle and is in the form of a non-closed ring or an irregular ring; the connecting rod is configured to move with the needle bar in the vertical direction, and when the presser foot contacts the working surface, the needle bar can drive the needle to move relative to the connecting rod; A rotating assembly is connected to the connecting rod; the rotating assembly is configured to drive the connecting rod to rotate around the needle bar, thereby causing the presser foot to rotate around the needle.

[0006] In at least some embodiments of this application, The irregularly shaped ring-shaped presser foot has a pressing section and a raised section; the raised section is arranged parallel to the horizontal plane and its height is less than the height of the raised section.

[0007] In at least some embodiments of this application, The pressing section and the protruding section are stepped or the pressing section is inclined relative to the horizontal plane.

[0008] In at least some embodiments of this application, On the vertical projection plane, the area of ​​the pressing section is less than half the total area of ​​the presser foot.

[0009] In at least some embodiments of this application, The presser foot is semi-circular in shape.

[0010] In at least some embodiments of this application, The connecting rod includes a first connecting part, a sleeve part, and a second connecting part connected in sequence; the first connecting part is connected to the rotating assembly; the sleeve part has a through hole for the needle bar to pass through; the second connecting part extends along the axial direction of the needle bar and its lower end is connected to the pressure foot; The distance the needle bar moves relative to the connecting rod is less than the length from the sleeve to the presser foot.

[0011] In at least some embodiments of this application, The needle bar has a protrusion at one end connected to the needle, the protrusion being arranged between the sleeve and the presser foot; the sleeve is configured to prevent the protrusion from passing through the through hole, thereby restricting the vertical movement of the needle in the space between the sleeve and the presser foot.

[0012] In at least some embodiments of this application, The rotating assembly includes a drive component, a gear, and a sliding shaft; the sliding shaft is nested inside the gear and sleeved on the needle bar; a slot is provided on the periphery of the sliding shaft, and the first connecting part passes through the slot; The driving component is connected to the gear via a transmission belt; the driving component is configured to drive the gear to rotate via the transmission belt, thereby causing the first connecting portion in the slot to rotate with the sliding shaft.

[0013] In at least some embodiments of this application, A spring is also fitted on the needle bar, and the spring is arranged between the sliding shaft and the sleeve portion, with one end near the sliding shaft being fixedly connected to the needle bar.

[0014] In a second aspect, this application provides an embroidery machine, including an embroidery machine head assembly as described in any one of the first aspects.

[0015] The above-described technical solutions of this application have at least one or more of the following beneficial effects: In implementing the technical solution of this application, by setting the presser foot to a non-closed ring or irregular ring shape, which only partially contacts the fabric, it can avoid pressure-sensitive protrusions such as sponge, soft rubber, and plush on the fabric, thus avoiding defects such as indentations and fabric sagging during embroidery, and expanding the design space for three-dimensional embroidery. The rotating component independently drives the connecting rod and the presser foot to rotate around the needle bar. The rotation of the presser foot and the vertical lifting and lowering of the needle bar are independent of each other, and will not cause unilateral uneven load friction on the needle bar, effectively reducing needle bar wear, reducing equipment jamming failures, extending the service life of the machine head, and reducing maintenance costs. At the same time, the needle bar can move vertically relative to the connecting rod. With the presser foot design, it can not only stably press the fabric to prevent fabric displacement and skipped stitches, but also avoid the sewing thread dragging up the fabric. The rotating component drives the presser foot to dynamically adjust the pressing position according to the embroidery trajectory, which is suitable for embroidery operations on various concave and convex three-dimensional fabrics.

[0016] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0017] The disclosure of this application will become more readily understood with reference to the accompanying drawings. It will be readily understood by those skilled in the art that these drawings are for illustrative purposes only and are not intended to limit the scope of protection of this application. Furthermore, similar numbers in the drawings are used to denote similar components, wherein: Figure 1 This is a schematic diagram of the structure of an embroidery machine head assembly according to an embodiment of this application; Figure 2 This is a three-dimensional structural schematic diagram of a presser foot according to an embodiment of this application; Figure 3 This is a three-dimensional structural schematic diagram of the presser foot according to another embodiment of this application; Figure 4 This is a top view of the presser foot and needle according to another embodiment of this application; Figure 5 This is a schematic diagram of the structure of an embroidery machine head assembly according to another embodiment of this application; Figure 6 This is a partial structural schematic diagram of a rotating assembly according to an embodiment of this application; Figure 7 This is a schematic diagram of the structure of an embroidery machine head assembly and fabric according to an embodiment of this application. Detailed Implementation

[0018] Some embodiments of this application are described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of this application and are not intended to limit the scope of protection of this application.

[0019] See appendix Figure 1 An embodiment of this application provides an embroidery machine head assembly, comprising: The needle bar assembly includes a needle bar 101 and a needle 102 mounted on the lower end of the needle bar 101; the needle bar 101 is configured to move in a vertical direction to drive the needle 102 to rise and fall. The presser foot assembly includes a connecting rod 200 and a presser foot 300; the connecting rod 200 is sleeved on the needle bar 101; the lower end of the connecting rod 200 is connected to the presser foot 300; the presser foot 300 is disposed on the outer periphery of the needle 102 and is in the form of a non-closed ring or an irregular ring; the connecting rod 200 is configured to move with the needle bar 101 in the vertical direction, and when the presser foot 300 contacts the working surface, the needle bar 101 can drive the needle 102 to move relative to the connecting rod 200; A rotating assembly is connected to a connecting rod 200; the rotating assembly is configured to drive the connecting rod 200 to rotate around the needle bar 101, thereby causing the presser foot 300 to rotate around the needle 102.

[0020] It can be understood that the working surface is the plane formed when the fabric to be embroidered is laid flat on the machine table during embroidery processing, which bears the embroidery processing action. After the presser foot 300 moves down, it directly contacts and presses against this plane, which is the working surface for the needle 102 to pierce and form stitches. The various parts of the embroidery machine head assembly move independently but in coordination: the needle bar 101 performs a vertical lifting action, driving the needle 102 to complete the piercing and embroidery work; the connecting rod 200 is sleeved on the outside of the needle bar 101 and can move up and down synchronously with the needle bar 101. When pressing down, the connecting rod 200 drives the bottom non-closed / irregular ring-shaped presser foot 300 to press against the working surface and tighten the fabric. The needle bar 101 continues to move down and extends the needle 102 to complete the embroidery; when the needle bar 101 moves up, it lifts the connecting rod 200 and the presser foot 300 away from the fabric. The rotating component is only connected to the connecting rod 200 for transmission. It independently drives the connecting rod 200 and the connected presser foot 300 to rotate around the needle bar 101. The rotational motion is not transmitted to the needle bar 101. The lifting and lowering of the needle bar 101 and the rotation of the presser foot 300 are independent of each other and will not cause unilateral friction and wear on the needle bar 101.

[0021] The presser foot 300 adopts a non-closed ring-shaped, irregularly shaped ring structure, unlike traditional fully enclosed circular presser feet, where only a portion of the ring contacts the fabric. Before the embroidery needle moves, the rotating component can drive the connecting rod 200 in advance according to the embroidery pattern trajectory, causing the presser foot 300 to rotate and adjust its angle, ensuring that the presser foot 300 avoids pressure-sensitive protrusions such as fabric sponge, soft rubber, and plush. During the embroidery process, the protruding areas of the fabric are not squeezed by the presser foot; only the flat areas of the fabric contact the pressing section of the presser foot for compression and positioning. This method relies on the partial presser foot to fix the fabric and prevent shifting or skipped stitches, while also preventing the protruding material from being compressed, resulting in dents, flattened fibers, or permanent indentations. There is no need to deliberately avoid protruding areas during layout, achieving full coverage embroidery of three-dimensional protruding fabric. In this application, "non-closed ring-shaped" refers to a ring-shaped structure with one or more openings or notches in the circumferential direction, including but not limited to semi-circular rings, C-shaped rings, U-shaped rings, and arc-shaped rings. Compared to a closed circular presser foot, the non-closed circular presser foot has a smaller contact area with the fabric and has openings or gaps. Driven by the rotating component, the openings or gaps can be aligned with the pressure-sensitive protrusions on the fabric, thus achieving avoidance.

[0022] In summary, in the embodiments of this application, by setting the presser foot 300 as a non-closed ring or an irregularly shaped ring, which only partially contacts the fabric, it can avoid pressure-sensitive protrusions such as sponge, soft rubber, and plush on the fabric, thus avoiding defects such as indentations and fabric sagging during embroidery, and expanding the design space for three-dimensional embroidery. The rotating component independently drives the connecting rod 200 and the presser foot 300 to rotate around the needle bar 101. The rotation of the presser foot 300 and the vertical lifting and lowering of the needle bar 101 are independent of each other, and will not cause unilateral uneven load friction on the needle bar 101, effectively reducing wear on the needle bar 101, reducing equipment jamming failures, extending the service life of the machine head, and reducing maintenance costs. At the same time, the needle bar 101 can move vertically relative to the connecting rod 200. With the design of the presser foot 300, it can not only stably press the fabric to prevent fabric displacement and skipped stitches, but also avoid the sewing thread dragging up the fabric. The rotating component drives the presser foot 300 to dynamically adjust the pressing position according to the embroidery trajectory, adapting to various three-dimensional fabric embroidery operations.

[0023] In one embodiment, such as Figure 2 and Figure 3As shown, the irregularly shaped annular presser foot 300 has a lower pressing section 301 and a raised section 302. The lower pressing section 301 is parallel to the horizontal plane and its height is less than that of the raised section 302. The lower pressing section 301, which is parallel to and adheres to the fabric, stabilizes the fabric and prevents slippage and skipped stitches. The higher raised section 302 forms a stepped drop, serving as a clearance structure. During embroidery, the raised section 302 is aligned with the non-pressure-resistant raised parts of the fabric, such as sponge, plush, or soft rubber. The raised section 302 does not contact the raised fabric; only the lower pressing section 301 presses down on the flat area of ​​the fabric, thus completing the fabric positioning while avoiding indentations, dents, or flattened fibers caused by pressure on the raised material. The positions of the lower pressing section 301 and the raised section 302 can be adjusted by rotating the rotating component according to the actual fabric requirements.

[0024] In one specific implementation, refer to Figure 2 The pressing section 301 and the raised section 302 are stepped. The stepped presser foot 300 has two complete parallel planes, which makes it more stable during operation, distributes the force, and makes the wear of long-term high-speed embroidery more uniform, thus extending the service life of the presser foot and reducing replacement costs.

[0025] In one specific implementation, refer to Figure 3 The raised section 302 is inclined relative to the horizontal plane. As a transitional slope, when the presser foot is rotated to the 300° angle or the machine head moves to feed the fabric, the sponge, plush, and soft rubber protrusions can smoothly slide along the slope without scratching or snagging the plush fabric, thus preventing snagging and damage to the raised layer of the 3D embroidery. Since the height of foam and plush protrusions on the fabric is often uneven, the inclined surface provides a gradual height difference, allowing both low and slightly higher protrusions to be suspended and avoided. When the rotating component drives the presser foot to rotate and avoid the protrusions, the inclined slope occupies less radial space, resulting in less interference with the fabric protrusions and embroidery thread during rotation, thus enhancing the adaptability of dynamic avoidance. Furthermore, the aforementioned stepped, transitional slope design of the irregularly shaped annular presser foot structure prevents the sewing thread from snagging the fabric when the needle rises, further ensuring the appearance quality of the embroidery.

[0026] In one specific implementation, on the vertical projection plane, the area of ​​the pressing section 301 is less than half the total area of ​​the presser foot 300. That is, the angle of the center of the horizontal ring corresponding to the pressing section 301 is less than 180 degrees. This provides stable clamping force by relying on the retained horizontal pressing section 301 to prevent fabric slippage, skipped stitches, and deformation during embroidery, while also allowing most of the presser foot 300 area to serve as clearance space. This allows for a large area to accommodate the raised structures of fabrics such as sponge, plush, and soft rubber, effectively preventing defects such as indentations, dents, and flattened fibers from being pressed on the raised parts. At the same time, the small pressing area allows for small rotations to complete clearance during rotation and adjustment, resulting in faster dynamic adjustment response and higher processing smoothness under high-speed needlework conditions.

[0027] In one embodiment, reference Figure 1and Figure 4 The presser foot 300 is semi-circular, meaning that the pressing area occupies exactly half of the entire structure when projected vertically. This design allows for stable pressing of the fabric with a complete, flat contact surface, effectively preventing fabric slippage, skipped stitches, and stitch twisting during embroidery. It also naturally reserves the other half of the ring as a buffer area. When rotated with the rotating component, this buffer area can be aligned with the non-pressure-resistant protruding parts of the fabric, such as sponge, plush, and soft rubber, preventing indentations, dents, and flattened fibers from being pressed. At the same time, the semi-circular structure is dimensionally regular, easy to process and form, and has a clear logic for angle switching during rotation adjustment, providing more balanced fabric support compared to narrow, localized presser feet.

[0028] In one embodiment, reference Figure 5 The connecting rod 200 includes a first connecting part 201, a sleeve part 202, and a second connecting part 203 connected in sequence. The first connecting part 201 is connected to a rotating assembly, which drives the connecting rod 200 to rotate around the needle bar 101. The sleeve part 202 has a through hole through which the needle bar 101 passes. The second connecting part 203 extends along the axial direction of the needle bar 101 and its lower end is connected to a pressure foot 300. Therefore, the connecting rod 200 and the pressure foot 300 will rotate circumferentially synchronously with the rotating assembly, and the needle bar 101 can slide independently vertically within the through hole of the sleeve part. The moving distance of the needle bar 101 relative to the connecting rod 200 is less than the length from the sleeve part 202 to the pressure foot 300, that is, the range of motion of the needle 102 is between the sleeve part 202 and the pressure foot 303, preventing it from coming off.

[0029] In one specific embodiment, the end of the needle bar 101 connected to the needle 102 has a protrusion 103, which is arranged between the sleeve portion 202 and the presser foot 300. The sleeve portion 202 is configured to prevent the protrusion 103 from passing through the through hole, thereby restricting the vertical movement of the needle 102 in the space between the sleeve portion 202 and the presser foot 300. That is, the protrusion 103 is limited between the sleeve portion 202 and the presser foot 300, and the through hole of the sleeve portion 202 can prevent the protrusion 103 from passing upward, thereby limiting the needle bar to move up and down only within the interval between the sleeve portion 202 and the presser foot 300.

[0030] During the embroidery pressing stage: the needle bar 101 moves downward, the lower end protrusion 103 moves downward, and at the same time drives the connecting rod 200 and the presser foot 300 to move down synchronously to press the fabric of the working surface; the needle bar 101 continues to move down, the protrusion 103 and the sleeve part 202 generate relative displacement, and the needle 102 extends out of the presser foot 300 to pierce the fabric to complete the embroidery. Embroidery lifting stage: The needle bar 101 retracts upward, driving the connecting rod 200 and presser foot 300 to lift and detach from the fabric simultaneously. The protrusion 103 pushes the sleeve part 202 upward and is limited by the sleeve part 202 to prevent it from coming off.

[0031] In one embodiment, reference Figure 6The rotating assembly includes a drive component, a gear 400, and a sliding shaft 500; the sliding shaft 500 is nested inside the gear 400 and sleeved on the needle bar 101; a slot 501 is provided on the periphery of the sliding shaft 500, and a first connecting part 201 is provided through the slot 501; the drive component is connected to the gear 400 via a transmission belt; the drive component is configured to drive the gear 400 to rotate via the transmission belt, so as to drive the first connecting part 201 in the slot 501 to rotate with the sliding shaft.

[0032] Specifically, the sliding shaft 500 is hollow inside and directly sleeved on the outside of the needle bar 101. The sliding shaft 500 is externally interference-fitted and fixed inside the gear 400. When the gear 400 rotates, it can synchronously drive the sliding shaft 500 to rotate as a whole. The sliding shaft 500 itself only rotates circumferentially and has no vertical displacement, and will not rise or fall with the needle bar 101. A through slot 501 is opened on the side wall of the sliding shaft 500, and the first connecting part 201 of the connecting rod 200 passes laterally into the slot 501, forming a circumferential transmission and limiting fit.

[0033] The driving component can be an independent rotary motor. Its output end is driven by meshing with the outer ring of the gear 400 through a transmission belt. The output torque of the driving component is transmitted to the gear 400 through the transmission belt. The gear 400 drives the embedded sliding shaft 500 to rotate synchronously in the circumferential direction. The slot 501 of the sliding shaft 500 engages with the first connecting part 201, thereby driving the entire connecting rod 200 and the bottom presser foot 300 to rotate synchronously around the needle rod 101. When the presser foot 300 needs to be adjusted to avoid fabric protrusions during embroidery, the drive unit starts and outputs rotational power. The power is transmitted through the transmission belt to the outer ring of the gear 400, causing the gear 400 and the embedded sliding shaft 500 to rotate synchronously. The side wall of the slot 501 of the sliding shaft 500 abuts against the first connecting part 201 of the connecting rod 200 inserted therein. The limiting structure of the slot 501 drives the connecting rod 200 to rotate around the needle bar 101. The lower end of the connecting rod 101 is connected to the presser foot 300, and the circumferential angle adjustment is completed synchronously. The pressing section 301 and the protruding section 302 of the presser foot 300 are aligned with the flat area and the protruding area of ​​the fabric, respectively. After the angle adjustment is completed, the drive unit stops and locks the gear 400, and the presser foot 300 maintains the current angle to press the fabric stably. The needle bar 101 moves up and down synchronously and independently, driving the needle to pierce the fabric to complete the embroidery. The movements of the two do not interfere with each other.

[0034] The rotating assembly transmits power through a drive unit, transmission belt, gear 400, and sliding shaft 500. The rotational torque is applied only to the sliding shaft 500, connecting rod 200, and presser foot 300. The needle bar 101 moves vertically independently without bearing torsional force, effectively preventing uneven wear and jamming noises on one side of the needle bar 101 and extending the service life of the parts. The gear 400 transmission, combined with the slot 501 hard limit transmission, has a small clearance. The presser foot 300's rotation angle is precisely adjustable, allowing for slight adjustments to follow the embroidery trajectory and precisely avoid protrusions in fabrics such as sponge and plush to prevent indentations. The sliding shaft 500, gear 400, and connecting rod 200 are assembled in layers and can be disassembled and replaced individually, making equipment maintenance convenient.

[0035] In one specific embodiment, a spring is also fitted onto the needle bar 101. The spring is arranged between the slide shaft 500 and the sleeve portion 202, with one end near the slide shaft 500 fixedly connected to the needle bar 101. By placing the spring between the slide shaft 500 and the sleeve portion 202 of the connecting rod 200, and with the upper end of the spring fixedly connected to the needle bar 101, when the needle bar 101 moves downward, the spring pushes down against the connecting rod 200, causing the presser foot 300 to press against the fabric. When the needle bar 101 moves upward, the spring is simultaneously pulled to lift the presser foot 300. The lifting and lowering force of the presser foot 300 is achieved by the spring arranged in the middle. Compared to the traditional structure where the spring is located at the top of the machine head, the force does not compress the side wall of the needle bar 101 at a single point, significantly reducing the wear and tear caused by the long-term lifting and lowering sliding of the needle bar 101. It extends the service life of the needle bar; at the same time, the spring is located in the interlayer space below the slide shaft 500 and above the sleeve part 202, which is compact and does not occupy the upper space of the machine head. The slide shaft 500 only rotates without vertical displacement, so it will not rub against or interfere with the spring. When rotating to adjust the angle of the presser foot, the transmission is smooth and there is no jamming. The spring acts directly on the middle of the connecting rod 200, and the downward pressure is even and stable. The presser foot 300 presses the fabric evenly, which can not only reliably fix the fabric to prevent slippage and skipped stitches, but also cooperate with the local irregular presser foot to avoid the fabric protrusion, thus improving the overall stability of high-speed embroidery.

[0036] Based on the above implementation methods, referring to Figures 1-7 An optional working process of the embroidery machine head assembly in this application embodiment: Before the embroidery operation starts, the drive unit outputs corresponding corner signals according to the embroidery pattern trajectory and the distribution of the raised areas 600 on the fabric. The drive unit drives the gear 400 and the embedded sliding shaft 500 to rotate synchronously via the transmission belt. The slot 501 on the sliding shaft 500 engages with the first connecting part 201 of the connecting rod 200, driving the entire connecting rod 200 and the bottom semi-circular or irregularly shaped presser foot 300 to rotate circumferentially around the needle rod 101, aligning the large area of ​​the presser foot 300 with the raised area 600 on the fabric and the lower pressing section 301 with the flat area of ​​the fabric, thus completing the angle locking. During the embroidery pressing stage, the needle bar 101 moves downward vertically, and slides relative to the sliding shaft 500 and the sleeve 202 of the connecting rod 200. The spring fixed to the side of the sliding shaft 500 on the needle bar 101 presses down against the sleeve 202 of the connecting rod 200, causing the connecting rod 200 and the presser foot 300 to move down synchronously to fit the fabric of the work surface. The protrusion 103 at the lower end of the needle bar 101 abuts against the lower side of the sleeve 202, limiting the maximum downward distance of the needle bar 101 relative to the connecting rod 200. The pressing section of the presser foot 300 presses the fabric flat to prevent the fabric from slipping or skipping stitches. The raised area 600 of the fabric corresponds to the raised section of the presser foot 300 to avoid being squeezed throughout the process, avoiding defects such as indentations, dents, and pile. The needle bar 101 continues to extend downward, and the needle 102 pierces the fabric to complete the embroidery. During the embroidery lifting stage, the needle bar 101 retracts upwards, and the needle bar 101 simultaneously pulls the spring upwards to push the sleeve part 202. The protrusion 103 presses against the lower edge of the sleeve part 202, driving the connecting rod 200 and the presser foot 300 to lift away from the fabric simultaneously. The needle 102 retracts simultaneously, completing a single puncture cycle. If the next section of the thread passes through a new fabric protrusion, the drive component can drive the gear 400 and the sliding shaft 500 to rotate again during the needle bar lifting interval, adjusting the angle of the presser foot 300 in real time to continuously avoid the protruding area 600. In the entire mechanism, the sliding shaft 500 only rotates circumferentially without vertical displacement. The rotational driving force is only transmitted to the connecting rod 200 and the presser foot 300. The needle bar 101 only moves vertically independently without bearing torsional force, and the two movements are completely decoupled. The spring is arranged between the sliding shaft 500 and the sleeve part 202. The downward pressure is evenly distributed without single-point uneven load and wear on the needle bar 101. The stepped or inclined protruding section 302 can smoothly avoid irregular protruding areas 600 or semi-circular presser foot 300. The pressure section 301, which has less than half of the projected area, balances the stability of the pressing cloth and the avoidance space. The whole process achieves the effects of stable pressing of high-speed embroidery, dynamic avoidance of pressure-sensitive protruding fabric, and reduction of wear on machine head parts.

[0037] Furthermore, this application provides an embroidery machine, including the embroidery machine head assembly as described above.

[0038] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," 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 this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0039] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0040] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., 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, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0041] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. An embroidery machine head assembly, characterized in that, include: A needle bar assembly includes a needle bar and a needle mounted at the lower end of the needle bar; the needle bar is configured to move vertically to drive the needle to rise and fall. A presser foot assembly includes a connecting rod and a presser foot; the connecting rod is sleeved on the needle bar; the lower end of the connecting rod is connected to the presser foot; the presser foot is disposed on the outer periphery of the needle and is in the form of a non-closed ring or an irregular ring; the connecting rod is configured to move with the needle bar in the vertical direction, and when the presser foot contacts the working surface, the needle bar can drive the needle to move relative to the connecting rod; A rotating assembly is connected to the connecting rod; the rotating assembly is configured to drive the connecting rod to rotate around the needle bar, thereby causing the presser foot to rotate around the needle.

2. The embroidery machine head assembly according to claim 1, characterized in that, The irregularly shaped ring-shaped presser foot has a pressing section and a raised section; the pressing section is arranged parallel to the horizontal plane and its height is less than the height of the raised section.

3. The embroidery machine head assembly according to claim 2, characterized in that, The pressing section and the protruding section are stepped or the protruding section is inclined relative to the horizontal plane.

4. The embroidery machine head assembly according to claim 2 or 3, characterized in that, On the vertical projection plane, the area of ​​the pressing section is less than half the total area of ​​the presser foot.

5. The embroidery machine head assembly according to claim 1, characterized in that, The presser foot is semi-circular in shape.

6. The embroidery machine head assembly according to claim 1, characterized in that, The connecting rod includes a first connecting part, a sleeve part, and a second connecting part connected in sequence; the first connecting part is connected to the rotating assembly; the sleeve part has a through hole for the needle bar to pass through; the second connecting part extends along the axial direction of the needle bar and its lower end is connected to the pressure foot; The distance the needle bar moves relative to the connecting rod is less than the length from the sleeve to the presser foot.

7. The embroidery machine head assembly according to claim 6, characterized in that, The needle bar has a protrusion at one end connected to the needle, the protrusion being arranged between the sleeve and the presser foot; the sleeve is configured to prevent the protrusion from passing through the through hole, thereby restricting the vertical movement of the needle in the space between the sleeve and the presser foot.

8. The embroidery machine head assembly according to claim 6, characterized in that, The rotating assembly includes a drive component, a gear, and a sliding shaft; the sliding shaft is nested inside the gear and sleeved on the needle bar; a slot is provided on the periphery of the sliding shaft, and the first connecting part passes through the slot; The driving component is connected to the gear via a transmission belt; the driving component is configured to drive the gear to rotate via the transmission belt, thereby causing the first connecting portion in the slot to rotate with the sliding shaft.

9. The embroidery machine head assembly according to claim 8, characterized in that, A spring is also fitted on the needle bar, and the spring is arranged between the sliding shaft and the sleeve portion, with one end near the sliding shaft being fixedly connected to the needle bar.

10. An embroidery machine, characterized in that, Includes the embroidery machine head assembly as described in any one of claims 1-9.

Images