Height adjustment mechanism and embroidery machine

Abstract

The application discloses a height adjusting mechanism and an embroidery machine. The height adjusting mechanism comprises a machine head component and a driving assembly. The machine head component comprises a needle bar assembly and a needle nozzle mechanism. The needle bar assembly comprises a needle bar and a needle mounted at the lower end of the needle bar. The needle nozzle mechanism comprises a needle nozzle bar and a needle nozzle mounted at the lower end of the needle nozzle bar. The driving assembly is used to lift the needle bar assembly and the needle nozzle mechanism during a non-embroidery period. The driving assembly comprises a first driving mechanism and a second driving mechanism. The first driving mechanism is connected with the needle nozzle bar and can drive the needle nozzle bar to lift. The second driving mechanism is connected with the needle bar and can drive the needle bar to lift. The embroidery machine comprises the height adjusting mechanism and a frame. The frame is used to fix a fabric. When the first driving mechanism and the second driving mechanism drive the needle nozzle and the needle to lift respectively, the needle and the needle nozzle are lifted and move away from a working surface upward, so that the space above the working surface is increased, the fabric is operated, and the taking and placing operation of the fabric is more convenient.

Description

Technical Field

[0001] This invention relates to the field of embroidery machine technology, and more particularly to a height adjustment mechanism and an embroidery machine. Background Technology

[0002] The machine head in an embroidery machine sewn embroidery thread onto the fabric through reciprocating motion, forming an embroidery pattern on the fabric surface. After completing an embroidery piece, the fabric needs to be removed and replaced with a new fabric to be embroidered. The fabric is usually located below the machine head, but the space below the machine head is small, which is not conducive to taking the fabric in and out. Summary of the Invention

[0003] This invention aims to at least solve one of the technical problems existing in the prior art. To this end, this invention proposes a height adjustment mechanism that can raise the machine head during non-embroidery periods, making it more convenient to load and unload fabric.

[0004] The present invention also proposes an embroidery machine having the above-mentioned height adjustment mechanism.

[0005] According to a first aspect of the present invention, a height adjustment mechanism includes a head assembly and a drive assembly. The head assembly includes a needle bar assembly and a needle tip mechanism. The needle bar assembly includes a needle bar and a needle mounted on the lower end of the needle bar. The needle tip mechanism includes a needle tip rod and a needle tip mounted on the lower end of the needle tip rod. The drive assembly is used to lift the needle bar assembly and the needle tip mechanism during non-embroidery periods. The drive assembly includes a first drive mechanism and a second drive mechanism. The first drive mechanism is connected to the needle tip rod and is capable of driving the needle tip rod to rise and fall. The second drive mechanism is connected to the needle bar and is capable of driving the needle bar to rise and fall.

[0006] The height adjustment mechanism according to embodiments of the present invention has at least the following beneficial effects: During non-embroidery periods, when the first drive mechanism and the second drive mechanism drive the needle tip and the needle to rise respectively, the needle and the needle tip are lifted and moved upward away from the working surface, increasing the space above the working surface to facilitate the corresponding operations on the fabric and making the picking and putting of the fabric more convenient. In addition, in the case of a composite drive assembly that links the needle bar assembly and the needle tip mechanism, after the fabric operation is completed, the first drive mechanism and the second drive mechanism respectively drive the needle tip and the needle to descend, so that the needle tip and the needle bar descend to the initial embroidery position. This allows the composite drive assembly to drive the needle tip mechanism and the needle bar assembly to move up and down again during the embroidery period. The transition between the machine head and the drive assembly during the embroidery period and the non-embroidery period is smooth, enabling automated embroidery.

[0007] According to some embodiments of the present invention, the driving assembly includes a first driver, and both the first driving mechanism and the second driving mechanism are connected to the first driver. The first driver drives the needle bar and the needle tip bar to move up and down through the first driving mechanism and the second driving mechanism. Alternatively, the drive assembly includes a first driver and a second driver, the first driver being connected to the first drive mechanism and the second driver being connected to the second drive mechanism, the first driver and the second driver being able to drive the needle bar and the needle tip bar to rise and fall respectively through the first drive mechanism and the second drive mechanism.

[0008] According to some embodiments of the present invention, the driving assembly includes a first driver, the first driving mechanism includes a first actuator, the first driver is connected to the first actuator and is used to drive the first actuator to rotate or lift, the needle tip mechanism includes a needle tip support, the needle tip support is connected to the needle tip rod, the first actuator is connected to the needle tip support, and the first actuator is capable of lifting the needle tip.

[0009] According to some embodiments of the present invention, the first drive mechanism further includes a drive gear, the first driver drives the drive gear to rotate, the needle holder is configured with a needle holder engagement portion that engages with the first actuator, the first actuator is an extension portion configured on the side of the drive gear, and the first actuator is capable of lifting the needle holder engagement portion upward.

[0010] According to some embodiments of the present invention, the needle tip mechanism further includes a first elastic element, the head component further includes a head support, the needle bar and the needle tip bar are both vertically movably connected to the head support, the head support is in a fixed state, and the first elastic element acts on the needle tip support and the head support to reset the needle tip towards the working surface.

[0011] According to some embodiments of the present invention, the needle bar assembly further includes a sleeve, and the drive assembly further includes a locking mechanism, wherein a portion of the needle bar is inserted into the interior of the sleeve and threadedly connected to the sleeve, and the locking mechanism is used to lock or unlock the relative rotation of the needle bar and the sleeve; The second drive mechanism includes a central shaft connected to the sleeve and capable of driving the sleeve to rotate, and the needle can change its height in response to the rotation of the sleeve.

[0012] According to some embodiments of the present invention, the locking mechanism includes a locking member, a locking block, and a spring. The locking member has an axial channel, a radially extending groove, a first locking groove formed on the outer wall at one end of the groove, and a slot formed at the other end of the groove. A second locking groove is formed on the outer side of the upper end of the sleeve. The locking block is assembled in the groove and has a protrusion that cooperates with the second locking groove. The pin bar and the locking block are vertically movably adapted to each other. The spring is assembled in the slot and elastically acts on the locking block to move towards the first locking groove and cooperate with the second locking groove. In response to the insertion of the first locking groove into the unlocking object pushing the locking block to disengage the tab from the second locking groove, the needle can change its height in response to the rotation of the sleeve.

[0013] According to some embodiments of the present invention, the locking block is configured with an anti-rotation limiting hole, the upper part of the needle bar is configured to be adapted to the anti-rotation limiting hole in a manner that allows only axial movement, and the upper end of the needle bar passes through the anti-rotation limiting hole and is restricted from disengaging from the anti-rotation limiting hole by an end plate.

[0014] According to some embodiments of the present invention, the needle bar assembly further includes a height adjusting gear that is non-rotatably mounted on the bar sleeve, and a transmission gear is provided at the end of the central shaft, the height adjusting gear being coupled to the transmission gear.

[0015] According to some embodiments of the present invention, the drive assembly includes a first driver and a locking mechanism. The locking mechanism includes a movable locking member, and both the movable locking member and the first drive mechanism are connected to the first driver. In response to the drive of the first driver, the first drive mechanism drives the needle rod to rise and fall, and the movable locking member inserts into the first locking groove and pushes the locking block to disengage it from the second locking groove. In response to the central shaft driving the rod sleeve to rotate, the height of the needle is adjusted.

[0016] According to some embodiments of the present invention, the locking mechanism further includes a locking gear and a first cam pin mechanism disposed between the locking gear and the movable locking member, wherein the first driver drives the locking gear to rotate, thereby driving the movable locking member to move via the first cam pin mechanism.

[0017] According to some embodiments of the present invention, the first cam pin mechanism includes a first eccentric profile formed on the locking gear and a first pin protrusion formed on the movable locking member.

[0018] According to some embodiments of the present invention, the height adjustment mechanism further includes a drive back plate, the movable locking member, the locking gear and the first driver are mounted on the drive back plate, the movable locking member and the drive back plate are movably connected by one or more linear guide rail structures, the movable locking member and the drive back plate are connected by the locking elastic member, and the locking elastic member provides a force to the movable locking member away from the first locking groove.

[0019] According to some embodiments of the present invention, the head assembly further includes a presser foot mechanism, the presser foot mechanism includes a presser foot, and the drive assembly includes a third drive mechanism connected to the presser foot and used to drive the presser foot to rise and fall.

[0020] According to some embodiments of the present invention, the driving assembly includes a first driver, and the first driving mechanism, the second driving mechanism and the third driving mechanism are all connected to the first driver. The first driver drives the needle bar, the needle tip bar and the presser foot to rise and fall through the first driving mechanism, the second driving mechanism and the third driving mechanism. Alternatively, the drive assembly includes a first driver, a second driver, and a third driver. The first driver is connected to the first drive mechanism, the second driver is connected to the second drive mechanism, and the third driver is connected to the third drive mechanism. The first driver, the second driver, and the third driver drive the needle bar, the needle tip bar, and the presser foot to rise and fall through the first drive mechanism, the second drive mechanism, and the second drive mechanism, respectively. Alternatively, the drive assembly includes a first driver and a second driver, with the first drive mechanism and the third drive mechanism both connected to the first driver, and the second drive mechanism connected to the second driver. The first driver and the second driver can drive the needle bar, the needle tip bar, and the presser foot to rise and fall through the first drive mechanism, the second drive mechanism, and the second drive mechanism.

[0021] According to some embodiments of the present invention, the drive assembly further includes a first driver and a drive gear, the drive gear having a first actuation part; the needle tip mechanism includes a needle tip support, the needle tip support being connected to the needle tip rod, the needle tip support having a needle tip support engagement part engaging with the first actuation part, the first actuation part being capable of lifting the needle tip support engagement part upward; The first driver drives the drive gear to rotate, thereby driving the pressure foot to lift via the second cam pin mechanism, and lifting the needle tip via the first actuator.

[0022] According to some embodiments of the present invention, the presser foot mechanism includes a presser foot drive plate, which is vertically and movably mounted on a machine head bracket or frame. The presser foot drive plate is equipped with a first drive arm for connecting the presser foot. A second cam pin mechanism is located between the drive gear and the presser foot drive plate.

[0023] According to some embodiments of the present invention, the second cam pin mechanism includes a second eccentric profile formed on the drive gear and a second pin protrusion formed on the pressure foot drive plate.

[0024] According to some embodiments of the present invention, the presser foot mechanism further includes a presser foot bracket and a second elastic element. The presser foot bracket is in a fixed state, and the presser foot is vertically and movably mounted on the presser foot bracket. The second elastic element acts on the presser foot and the presser foot bracket to reset the presser foot toward the working surface.

[0025] An embroidery machine according to a second aspect embodiment of the present invention includes a height adjustment mechanism as described in the first aspect embodiment; it also includes a frame and an embroidery frame, the frame including a base extending along a first direction, a column extending upward from the first end of the base, and a machine arm extending along the first direction from the upper end of the column; the height adjustment mechanism is mounted on the machine arm and located above the base; the embroidery frame is detachably mounted on the frame, the embroidery frame is located on the upper side of the base, and the embroidery frame is used to fix the fabric to be embroidered.

[0026] The embroidery machine according to embodiments of the present invention has at least the following beneficial effects: This application incorporates a height adjustment mechanism that allows the needle bar assembly and needle tip mechanism to be raised during non-embroidery periods, providing ample operating space for the assembly and disassembly of the embroidery frame and facilitating fabric replacement.

[0027] Additional aspects and advantages of the invention 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 the invention. Attached Figure Description

[0028] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein: Figure 1 This is a schematic diagram of one embodiment of the height adjustment mechanism of the present invention; Figure 2 This is a schematic diagram illustrating the cooperation between the height adjustment mechanism and the composite drive component of one embodiment of the present invention; Figure 3 This is a schematic diagram of the height adjustment mechanism from another direction; Figure 4 A schematic diagram of one embodiment of the driving component; Figure 5An exploded view of one embodiment of the locking mechanism; Figure 6 for Figure 1 Enlarged view of point A in the middle; Figure 7 An exploded view of one embodiment of the driving component; Figure 8 A schematic diagram of one embodiment of the locking gear; Figure 9 A schematic diagram of one embodiment of a drive gear; Figure 10 This is a schematic diagram of one embodiment of the embroidery machine of the present invention.

[0029] Figure label: Head unit 10, head support 11; Drive assembly 20, first driver 21, second driver 22, first actuator 201, drive gear 202, second eccentric profile 203; Needle bar assembly 100, needle bar 110, needle 120, bar sleeve 130, second locking groove 131, height adjustment gear 140; Needle tip mechanism 200, needle tip rod 210, needle tip 220, needle tip support 230, needle tip support joint 231, composite drive unit 232, first elastic element 240; Composite drive component 300; Locking mechanism 400, locking element 410, axial channel 411, radially extending slide 412, first locking groove 413, slot 414, locking block 420, protrusion 421, anti-rotation limiting hole 422, spring 430, end plate 440. Central shaft 30, transmission gear 31; Locking mechanism 500, movable locking part 510, first pin protrusion 511, second mounting protrusion 512, first guide groove 513, second guide groove 514, first locking piece 515, second locking piece 516, locking gear 520, first eccentric profile 521, locking elastic part 530, main gear 540. Drive backplate 40, first mounting protrusion 41, first pin 42, second pin 43; Presser foot mechanism 600, presser foot 610, presser foot drive plate 620, second pin protrusion 621, plate body 622, first drive arm 623, second drive arm 624, presser foot bracket 630, second elastic element 640. Frame 50, base 51, column 52, arm 53; Embroidery frame 60. Detailed Implementation

[0030] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0031] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, 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. Therefore, they should not be construed as limiting this invention.

[0032] In the description of this invention, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0033] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0034] In the description of this invention, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the invention. 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.

[0035] The embroidery machine head uses reciprocating motion to sew embroidery thread onto the fabric, forming an embroidery pattern on the fabric surface. For example, the machine head is equipped with a needle module, and the needle can thread or hook the embroidery thread. As the needle moves up and down, it pierces the fabric to be embroidered, forming an embroidery pattern on the fabric. When the current embroidery task needs to be completed and the embroidery direction needs to be changed, or when the current embroidery needs to be completed and a new fabric to be embroidered needs to be replaced, the fabric is located below the machine head, the working space is small, the operation is restricted, and it is not conducive to picking up and putting down the fabric.

[0036] Based on the above, an embodiment of this application provides a height adjustment mechanism, referring to... Figure 1 The height adjustment mechanism includes a head assembly 10 and a drive assembly 20. The head assembly 10 includes a needle bar assembly 100 and a needle tip mechanism 200. The needle bar assembly 100 includes a needle bar 110 and a needle 120 mounted on the lower end of the needle bar 110. For example, the needle 120 is provided with a hook for holding embroidery thread or a needle hole for passing embroidery thread, so that the needle 120 can carry embroidery thread to embroider on the fabric. The needle tip mechanism 200 includes a needle tip bar 210 and a needle tip 220 mounted on the lower end of the needle tip bar 210. The needle tip 220 can be provided with a needle tip channel for the needle 120 to pass through. The needle tip 220 can hold the fabric and guide the needle 120 to embroider through the needle tip channel.

[0037] The drive assembly 20 is used to lift the needle bar assembly 100 and the needle tip mechanism 200 during non-embroidery periods. The embroidery period refers to the process by which the machine head assembly 10 embroiders the fabric through reciprocating motion, such as the process by which the needle 120 and the needle tip bar 210 embroider the embroidery thread onto the fabric during the up-and-down reciprocating movement. The non-embroidery period refers to the process by which the machine head assembly 10 stops reciprocating motion to stop the embroidery action on the fabric, such as the period when the needle 120 and the needle tip bar 210 stop reciprocating up-and-down movement.

[0038] For example, in combination Figure 2 The machine head assembly 10 also includes a composite drive assembly 300. The needle bar 110 and needle tip bar 210 are both connected to the composite drive assembly 300. The composite drive assembly 300 drives the needle tip bar 210 and needle bar 110 to move up and down reciprocally during the embroidery period, causing the needle tip mechanism 200 and needle bar assembly 100 to embroider onto the fabric. Using the plane containing the upper surface of the fabric as the working surface, during the embroidery period, when the needle tip 220 descends, it can press against the upper surface of the fabric. When the needle 120 descends, it can pierce the fabric and guide the embroidery thread below the working surface. When the needle tip 220 rises, it releases the pressure on the fabric, allowing the fabric to move or turn. When the needle 120 rises, it can detach from the fabric and guide the embroidery thread above the working surface. Through the up-and-down reciprocating movement of the needle tip 220 and needle 120, embroidery is continuously performed on the fabric. During non-embroidery periods, both the needle tip 220 and needle bar 110 stop moving up and down, and the embroidery action is interrupted.

[0039] The drive assembly 20 includes a first drive mechanism and a second drive mechanism. The first drive mechanism is connected to the needle rod 210 and is used to drive the needle rod 210 to rise and fall, so that the needle 220 can rise and fall synchronously with the needle rod 210. The second drive mechanism is connected to the needle bar 110 and is used to drive the needle bar 110 to rise and fall, so that the needle 120 can rise and fall synchronously with the needle bar 110. During non-embroidery periods, when the first and second drive mechanisms drive the needle tip 220 and the needle 120 to rise, the needle 120 and the needle tip 220 are lifted and moved upward away from the work surface, increasing the space above the work surface to facilitate corresponding operations on the fabric, such as changing the fabric or changing the fabric direction. After the fabric operation is completed, the first and second drive mechanisms drive the needle tip 220 and the needle 120 to fall, so that the needle tip 220 and the needle bar 110 fall to the initial embroidery position, allowing the composite drive assembly 300 to drive the needle tip mechanism 200 and the needle bar assembly 100 to move up and down again during the embroidery period. The transition between the machine head assembly 10 and the drive assembly 20 during the embroidery period is smooth, enabling automated embroidery.

[0040] Understandably, by raising the needle bar assembly 100 and the needle tip mechanism 200 during non-embroidery periods, the working space under the machine head assembly 10 can be increased, making the handling of fabric more convenient. Furthermore, the monotonous form of conventional embroidery patterns limits their diversity and modification, hindering the improvement of embroidery quality. In this application, the needle bar 110 and needle tip bar 210 are raised and lowered by the first and second driving mechanisms, allowing the height of the needle 120 to be changed during non-embroidery periods. This coordinates the embroidery height of the needle 120 with the height of the needle tip 220, enabling the needle 120 to embroider at different heights during different embroidery periods. This adjusts the stitch height on the embroidery, creating a layered and varied stitch pattern that enhances the quality of the embroidery. For example, if the non-embroidery period is set between adjacent first and second embroidery periods, changing the height of the needle 120 during this period allows the embroidery height of the needle 120 in the first embroidery period to be higher or lower than that in the second embroidery period, resulting in a varied stitch pattern in different areas of the fabric.

[0041] The first drive mechanism and the second drive mechanism can be driven by the same power source or by different power sources respectively. For example, the drive assembly 20 includes a first driver 21, and both the first drive mechanism and the second drive mechanism are connected to the first driver 21. The first driver 21 drives the needle bar 110 and the needle tip rod 210 to rise and fall through the first drive mechanism and the second drive mechanism. The first drive mechanism and the second drive mechanism are both driven by the first driver 21 and synchronously drive the needle bar 110 and the needle tip 220 to rise and fall, so that the needle bar 110 and the needle tip 220 are lifted. The first driver 21 is not limited to being configured as a power element such as a motor or servo motor that can output linear or rotary power.

[0042] Alternatively, in another embodiment, the drive assembly 20 includes a first driver 21 and a second driver 22. The first driver 21 is connected to a first drive mechanism, and the second driver 22 is connected to a second drive mechanism. The first driver 21 and the second driver 22 can drive the needle rod 110 and the needle tip rod 210 to rise and fall respectively through the first drive mechanism and the second drive mechanism. That is, while the first driver 21 drives the needle tip rod 210 to rise and fall through the first drive mechanism, the second driver 22 drives the needle rod 110 to rise and fall through the second drive mechanism, so that the needle rod 110 and the needle tip rod 210 are raised or pushed down. Similarly, the first driver 21 and the second driver 22 are not limited to being configured as power components such as motors or servos capable of outputting linear or rotary power.

[0043] In one feasible embodiment, the drive assembly 20 includes a first driver 21, which is configured as a linear motor. The needle bar 110 and the needle tip bar 210 are mounted on the same base. The first drive mechanism and the second drive mechanism include the base. The first driver 21 is connected to the base and drives the needle bar assembly 100 and the needle tip mechanism 200 to rise and fall by driving the base to rise and fall. Alternatively, in another embodiment, the drive assembly 20 includes a first driver 21 and a second driver 22, which are configured as linear motors. The first drive mechanism includes a first base, the needle tip bar 210 is mounted on the first base, the first driver 21 is connected to the first base, and drives the needle tip mechanism 200 to rise and fall through the first base. The second drive mechanism includes a second base, the needle bar 110 is mounted on the second base, the second driver 22 is connected to the second base, and drives the needle bar 110 to rise and fall through the second base. Of course, in other embodiments, the first driver 21 or the second driver 22 may also be configured as a rotary motor. The first driving mechanism and the second driving mechanism include a cam mechanism, a gear and rack mechanism or a synchronous belt mechanism, etc. The first driver 21 and the second driver 22 respectively convert the rotational power into linear power through the first driving mechanism and the second driving mechanism, and drive the needle bar assembly 100 or the needle tip mechanism 200 to rise and fall.

[0044] Combination Figure 1 , Figure 3 and Figure 4The drive assembly 20 includes a first driver 21, and the first drive mechanism includes a first actuator 201. The first driver 21 is connected to the first actuator 201 and is used to drive the first actuator 201 to rotate or lift. The needle tip mechanism 200 includes a needle tip support 230, which is connected to the needle tip rod 210. The first actuator 201 is connected to the needle tip support 230. When the first actuator 201 is driven by the first driver 21 to move, it lifts the needle tip 220 through the needle tip support 230. The connection between the first actuator 201 and the needle holder 230 is not limited to the following: the first actuator 201 abuts against the bottom of the needle holder 230, or the first actuator 201 and the needle holder 230 are rotatably connected, and their rotation axes are perpendicular to the lifting direction of the needle 220, etc.; the first driver 21 can be directly connected to the first actuator 201 and drive the first actuator 201 to move, or the first driver 21 can be indirectly connected to the first actuator 201 through other transmission mechanisms, which are not limited to gear transmission mechanisms, belt transmission mechanisms, etc.

[0045] Furthermore, the first drive mechanism also includes a drive gear 202, and the first driver 21 is configured as a rotary motor. The first driver 21 is used to drive the drive gear 202 to rotate. The needle holder 230 is constructed with a needle holder engagement portion 231 that engages with the first actuator 201. The engagement between the first actuator 201 and the needle holder engagement portion 231 is not limited to abutting or other methods. For example, the first actuator 201 abuts against the bottom of the needle holder engagement portion 231. The first actuator 201 is an extension constructed on the side of the drive gear 202. That is, the first actuator 201 protrudes along the radial direction of the drive gear 202 relative to the circumference of the drive gear 202. When the drive gear 202 rotates, the first actuator 201 can push the needle holder engagement portion 231 upward.

[0046] Understandably, the rotation axis of the drive gear 202 can be parallel to the horizontal direction. When the first driver 21 drives the drive gear 202 to rotate, the first actuator 201 moves up and down on the side of the drive gear 202. When the first actuator 201 lifts the needle holder engagement 231 upward, the needle holder 230 is lifted, and the needle rod 210 simultaneously drives the needle 220 to rise. Thus, by integrating the first actuator 201 into the side of the drive gear 202, the lifting of the needle mechanism 200 can be achieved simply by using the first driver 21 to drive the drive gear 202 to rotate. The first drive mechanism has a compact structure and high transmission efficiency.

[0047] Furthermore, the needle tip holder 230 also includes a composite drive unit 232, which is located at both ends of the needle tip holder 230, along with the needle tip holder engagement part 231. The needle tip holder engagement part 231 is used to link with the first actuator 201, and the composite drive unit 232 is used to link with the composite drive assembly 300. During the embroidery period, the composite drive assembly 300 causes the needle tip 220 to reciprocate by linking with the composite drive unit 232. During the non-embroidery period, the first actuator 201 of the drive gear 202 lifts the needle tip holder engagement part 231, thereby raising the needle tip 220.

[0048] In one embodiment, reference is made to Figure 2 and Figure 3 The needle tip mechanism 200 also includes a first elastic element 240, and the head assembly 10 also includes a head support 11. The needle bar 110 and the needle tip bar 210 are both vertically movably connected to the head support 11. The head support 11 is in a fixed state. The first elastic element 240 acts on the needle tip support 230 and the head support 11, causing the needle tip 220 to return to the working surface. Specifically, the lower end of the first elastic element 240 is connected to the needle tip support 230, and the upper end of the first elastic element 240 is connected to the head support 11. When the needle tip support 230 is lifted by the first actuator 201 during non-embroidery periods, the needle tip 220 moves upward and away from the working surface. At the same time, the first elastic element 240 is compressed. After the first actuator 201 removes its lifting action on the needle tip support 230, the first elastic element 240 releases its elastic force, pushing the needle tip support 230 downward, causing the needle tip 220 to return to the working surface.

[0049] In one embodiment, reference is made to Figure 1 and Figure 3The needle bar assembly 100 also includes a sleeve 130, with a portion of the needle bar 110 inserted into the sleeve 130 and threadedly connected to it. The drive assembly 20 also includes a locking mechanism 400, which is used to lock or unlock the relative rotation of the needle bar 110 and the sleeve 130. When the relative rotation of the needle bar 110 and the sleeve 130 is locked, they can only rotate synchronously because they are threadedly connected. When the relative rotation of the needle bar 110 and the sleeve 130 is unlocked, the needle bar 110 and the sleeve 130 can rotate relative to each other, and the needle bar 110 can move vertically relative to the sleeve 130. Furthermore, the drive assembly 20 also includes a second driver 22, which drives the sleeve 130 to rotate. The second driver 22 works in conjunction with the locking mechanism 400. When the locking mechanism 400 locks the relative rotation of the needle bar 110 and the sleeve 130, the second driver 22 drives the sleeve 130 and the needle bar 110 to rotate synchronously, causing the needle 120 to rotate and change the orientation of the needle hook of the needle 120. When the locking mechanism 400 unlocks the relative rotation of the needle bar 110 and the sleeve 130, the second driver 22 drives the needle bar 110 to move up and down relative to the sleeve 130, so that the needle 120 rises and falls.

[0050] It should be understood that during the embroidery period, the fabric needs to change its movement direction in real time according to the embroidery pattern. The orientation of the needle 120 hook is at a preset angle with the movement direction of the fabric to form a continuous stitch on the fabric. In this embodiment, by setting the second driver 22 to drive the needle 120 to move, the needle 120 is lifted during non-embroidery periods, thereby avoiding the operating space of the fabric and facilitating the picking and putting away of the fabric. At the same time, by setting the second driver 22 to drive the needle 120 to rotate during the embroidery period, the orientation of the needle 120 hook is changed so that the orientation of the needle 120 hook matches the movement direction of the fabric.

[0051] Specifically, the second drive mechanism includes a central shaft 30, a second driver 22 connected to one end of the central shaft 30 and driving the central shaft 30 to rotate, and the other end of the central shaft 30 connected to a lever sleeve 130 and capable of driving the lever sleeve 130 to rotate; when the second driver 22 drives the central shaft 30 to rotate, the needle 120 can change its height or change its hook orientation in response to the rotation of the lever sleeve 130. For example Figure 10 In the middle, the second driver 22 is connected to the central shaft 30 through a belt drive mechanism and drives the central shaft 30 to rotate.

[0052] Understandably, the rotation direction of the central shaft 30 can be parallel to the rotation direction of the sleeve 130, or the rotation direction of the central shaft 30 can be perpendicular to the rotation direction of the sleeve 130. The central shaft 30 and the sleeve 130 can be directly connected, or the central shaft 30 and the sleeve 130 can be connected through a gear transmission mechanism or a belt transmission mechanism. Figure 2In the illustrated embodiment, the rotation direction of the central shaft 30 is perpendicular to the rotation direction of the sleeve 130. The needle bar assembly 100 also includes a height adjustment gear 140 that is non-rotatably mounted on the sleeve 130. The height adjustment gear 140 surrounds the periphery of the sleeve 130. The end of the central shaft 30 is provided with a transmission gear 31. The height adjustment gear 140 is coupled to the transmission gear 31, that is, the height adjustment gear 140 meshes with the transmission gear 31. The height adjustment gear 140 and the transmission gear 31 can be configured as bevel gears. When the second driver 22 drives the central shaft 30 to rotate, the transmission gear 31 drives the height adjustment gear 140 to rotate, thereby driving the sleeve 130 to rotate.

[0053] In one embodiment, the locking mechanism 400 locks the relative rotation of the needle bar 110 and the sleeve 130 in the following manner: both the needle bar 110 and the sleeve 130 have radially connected positioning holes. The locking mechanism 400 includes a positioning pin. In the locked state, the positioning pin is inserted into the positioning holes of the needle bar 110 and the sleeve 130, thereby restricting the relative rotation of the needle bar 110 and the sleeve 130. The needle bar 110 and the sleeve 130 can only rotate synchronously. In the unlocked state, the positioning pin is withdrawn from the positioning holes of the needle bar 110 and the sleeve 130, thereby releasing the restriction on the relative rotation of the needle bar 110 and the sleeve 130. The needle bar 110 and the sleeve 130 then rotate relative to each other, and the needle bar 110 moves up and down relative to the sleeve 130.

[0054] Or, such as Figure 5 and Figure 6In the illustrated embodiment, the locking mechanism 400 includes a locking member 410, a locking block 420, and a spring piece 430. The locking member 410 has an axial channel 411, a radially extending groove 412, a first locking groove 413 corresponding to one end of the groove 412 constructed on the outer wall, and a slot 414 corresponding to the other end of the groove 412. The groove 412 is located at the circumferential end of the locking member 410 and extends radially along the locking member 410, with its two ends communicating with the first locking groove 413 and the slot 414, respectively. The axial channel 411 penetrates the locking member 410 vertically, and its upper end communicates with the groove 412. A second locking groove 131 is constructed on the outer side of the upper end of the sleeve 130. The first locking groove 413 and the second locking groove 131 are positioned... The locking block 420 is installed in the groove 412, and the upper end of the sleeve 130 passes through the axial channel 411. The upper end of the needle bar 110 passes through the inside of the locking block 420 and extends upward. The needle bar 110 and the locking block 420 are vertically movably adapted to each other, that is, the needle bar 110 can only move vertically relative to the locking block 420. The locking block 420 is constructed with a protrusion 421 that cooperates with the second locking groove 131. That is, when the protrusion 421 moves radially along the sleeve 130, the protrusion 421 can enter and exit the second locking groove 131. The spring piece 430 is installed in the slot 414 and acts elastically on the locking block 420. The spring piece 430 gives the buckle an elastic force to move toward the first locking groove 413, so that the protrusion 421 has a tendency to move toward the second locking groove 131.

[0055] Understandably, when the tab 421 is located in the second locking groove 131, the portion of the locking block 420 located in the slide groove 412 restricts the rotation of the needle rod 110, and the tab 421 restricts the rotation of the sleeve 130. The relative rotation of the needle rod 110 and the sleeve 130 is in a locked state. When the locking block 420 moves along the slide groove 412 and causes the tab 421 to exit from the second locking groove 131, the tab 421 no longer restricts the rotation of the sleeve 130 relative to the needle rod 110, and the restriction on the relative rotation of the needle rod 110 and the sleeve 130 is released.

[0056] Specifically, in response to the insertion of the unlocking object into the first locking groove 413, the unlocking object pushes the locking block 420 to move within the slide groove 412, and the latch moves toward the second locking groove 131, causing the protrusion 421 to exit from the second locking groove 131. The restriction on the relative rotation of the needle bar 110 and the sleeve 130 is released. Since the needle bar 110 and the sleeve 130 are threadedly engaged, when the sleeve 130 is driven by the central shaft 30 to rotate, the needle bar 110 moves relative to the sleeve 130 to change the height of the needle 120. For example, when the central shaft 30 rotates in the forward direction, the needle bar 110 moves upward, and when the central shaft 30 rotates in the reverse direction, the needle bar 110 moves downward.

[0057] When the unlocking object is removed from the first locking groove 413, the protrusion 421 is pushed by the elastic force of the spring 430, causing the locking block 420 to move along the slide groove 412. The protrusion 421 is inserted into the second locking groove 131 again. The relative rotation of the needle bar 110 and the sleeve 130 is in a locked state. When the sleeve 130 is driven by the central shaft 30 to rotate, the needle bar 110 rotates synchronously with the sleeve 130 to change the orientation of the needle hook of the needle 120.

[0058] In some embodiments, the locking block 420 is configured with an anti-rotation limiting hole 422. The upper part of the needle bar 110 is configured to be adapted to the anti-rotation limiting hole 422 in a manner that allows only axial movement. The upper end of the needle bar 110 extends out of the anti-rotation limiting hole 422 and is restricted from disengaging from the anti-rotation limiting hole 422 by an end plate 440. The end plate 440 is fixed to the top of the locking member 410 and restricts the locking block 420 between the end plate 440 and the locking member 410. Exemplarily, the upper part of the needle bar 110 has a rectangular cross-section. The anti-rotation limiting hole 422 extends in the same direction as the slide groove 412. The two opposing inner walls of the anti-rotation limiting hole 422 engage with the two sides of the upper part of the needle bar 110 to restrict the rotation of the needle bar 110 about the axial direction and allow it to move only vertically.

[0059] Specifically, the upper circumferential structure of the needle bar 110 has two opposing planes, and the anti-rotation limiting hole 422 is a hole structure including at least one pair of planes. The upper part of the needle bar 110 is configured to be adapted to the anti-rotation limiting hole 422 in a way that allows only axial movement, preventing the needle bar 110 from rotating when adjusting the height of the needle 120 by rotating the sleeve 130 in either the forward or reverse direction.

[0060] In one embodiment, the unlocking object is configured as a movable locking member 510. Specifically, the drive assembly 20 includes a locking mechanism 500, which includes a movable locking member 510. The movable locking member 510 can be inserted into or withdrawn from the first locking groove 413 to switch the locking or unlocking state of the needle bar 110 and the sleeve 130 rotating relative to each other.

[0061] Furthermore, the movable locking member 510 and the first drive mechanism can be driven by the same power source. For example, the drive assembly 20 includes a first driver 21. The movable locking member 510 and the first drive mechanism are both connected to the first driver 21. In response to the drive of the first driver 21, the first drive mechanism drives the needle tip bar 210 to rise and fall during non-embroidery periods to raise the needle tip 220. The first driver 21 drives the movable locking member 510 to insert into the first locking groove 413 and pushes the locking block 420 to disengage it from the first locking groove 413, so that the relative rotation between the needle bar 110 and the sleeve 130 is unlocked. Then, the central shaft 30 is driven by the second driver 22 to rotate, and the sleeve 130 is driven by the central shaft 30 to rotate, so that the needle bar 110 moves up and down to raise the needle bar 110.

[0062] In the case where both the movable locking member 510 and the first driving mechanism are driven by the first driver 21, the first driver 21 can be configured as a rotary motor. The first driving mechanism includes a driving gear 202, and the locking mechanism 500 includes a transmission rack. The movable locking member 510 is connected to the transmission rack, and the transmission rack meshes with the driving gear 202. Thus, the driving gear 202 is driven by the first driver 21 to rotate, thereby causing the first actuator 201 to lift the needle holder engagement portion 231 to raise the needle 220. The transmission rack is driven by the driving gear 202 to move, and the movable locking member 510 follows the movement of the transmission rack to insert into or exit the first locking groove 413.

[0063] Alternatively, in another embodiment, the first driver 21 may be configured as a rotary motor, and the first driving mechanism includes a driving gear 202. The movable locking member 510 is connected to the first driver 21 through a crank-slider mechanism. For example, the locking mechanism 500 includes a drive shaft, a crank, and a slider. One end of the drive shaft is connected to the first driver 21 and is driven by the first driver 21 to rotate. The crank is connected to the circumferential side of the drive shaft, and the driving gear 202 is connected to the end of the drive shaft. The crank and the driving gear 202 rotate synchronously with the rotation of the drive shaft. When the driving gear 202 rotates, the needle nozzle 220 is lifted by the first actuator 201 lifting the needle nozzle support engagement 231. The slider is connected to the movable locking member 510, and the crank is rotatably connected to the slider. When the crank rotates, it drives the slider to move. The movable locking member 510 moves synchronously with the slider and inserts into or exits the first locking groove 413.

[0064] like Figure 4 In the illustrated embodiment, the locking mechanism 500 further includes a locking gear 520 and a first cam pin mechanism configured between the locking gear 520 and the movable locking member 510. The first driver 21 drives the locking gear 520 to rotate, thereby driving the movable locking member 510 to move via the first cam pin mechanism. The first driver 21 drives the locking gear 520 to rotate, thereby driving the movable locking member 510 to move via the first cam pin mechanism. In response to the drive of the first driver 21, the movable locking member 510 inserts into the first locking groove 413 and pushes the locking block 420 to disengage from the first locking groove 413. In response to the central shaft 30 driving the sleeve 130 to rotate in the forward or reverse direction, the height of the needle 120 is adjusted.

[0065] Specifically, the movable locking member 510 and the locking gear 520 are arranged along the axial direction of the locking gear 520, and the first cam pin mechanism is located between the movable locking member 510 and the locking gear 520. For example, in one embodiment, the first cam pin mechanism includes an eccentric protrusion disposed on the side of the locking gear 520 facing the movable locking member 510. The eccentric protrusion is eccentrically disposed relative to the rotation axis of the locking gear 520. The movable locking member 510 is provided with a contour groove that slides with the eccentric protrusion. The eccentric protrusion is slidably disposed in the contour groove. When the locking gear 520 is driven to rotate by the first driver 21, the eccentric protrusion moves with the rotation of the locking gear 520. While moving along the contour groove, the eccentric protrusion abuts against the groove wall of the contour groove and pushes the movable locking member 510 to move, so that the movable locking member 510 inserts into or exits the first locking groove 413.

[0066] Alternatively, in another embodiment, such as Figure 7 and Figure 8 As shown, the first cam pin mechanism includes a first eccentric profile 521 constructed on the locking gear 520 and a first pin protrusion 511 constructed on the movable locking member 510. The first eccentric profile 521 and the first pin protrusion 511 abut against each other. The first eccentric profile 521 moves with the rotation of the locking gear 520 and pushes the first pin protrusion 511 to move, so that the movable locking member 510 moves to insert or withdraw from the first locking groove 413.

[0067] In one embodiment, the height adjustment mechanism further includes a drive back plate 40. A movable locking member 510, a locking gear 520, and a first driver 21 are mounted on the drive back plate 40. The movable locking member 510 and the drive back plate 40 are movably connected by one or more linear guide rail structures. The linear guide rail structures provide guidance for the movement of the movable locking member 510 relative to the drive back plate 40, ensuring precise engagement between the movable locking member 510 and the first locking groove 413. A locking elastic member 530 is connected between the movable locking member 510 and the drive back plate 40. The locking elastic member 530 provides a force to the movable locking member 510 away from the first locking groove 413 to reset the movable locking member 510 to the height adjustment state. For example, the two ends of the locking elastic member 530 are respectively connected to a first mounting protrusion 41 of the drive back plate 40 and a second mounting protrusion 512 of the movable locking member 510.

[0068] In some embodiments, one or more linear guide structures include at least one guide groove formed in the movable locking member 510, and at least one pin disposed on the drive back plate 40, the pin being slidably connected within the guide groove to guide the movement of the movable locking member 510 relative to the drive back plate 40. Exemplarily, the movable locking member 510 extends along its movement direction and includes a first guide groove 513 and a second guide groove 514 arranged along its movement direction, and a first pin 42 and a second pin 43 disposed on the drive back plate 40, the first pin 42 being slidably connected within the first guide groove 513, and the second pin 43 being slidably connected within the second guide groove 514.

[0069] Furthermore, the locking gear 520 is mounted on the second pin 43, that is, one end of the second pin 43 is connected to the first driver 21. The first driver 21 drives the locking gear 520 to rotate through the second pin 43, and at the same time guides the movement of the movable locking member 510 by the sliding engagement between the second pin 43 and the second guide groove 514.

[0070] like Figure 5 and Figure 7 In the illustrated embodiment, the movable locking member 510 includes a first locking piece 515 and a second locking piece 516 arranged along the axial direction of the locking gear 520. The first locking piece 515 is located between the second locking piece 516 and the drive back plate 40. The first locking piece 515 and the second locking piece 516 are integrally connected and bent towards each other. The first locking piece 515 is movably connected to the drive back plate 40. For example, the first locking piece 515 is provided with a guide groove, which is used to cooperate with the pin on the drive back plate 40 to guide the movement of the first locking piece 515. The second locking piece 516 can move along with the first locking piece 515. The second locking piece 516 is located on the side of the locking member where the first locking groove 413 is provided. The side of the second locking piece 516 facing the first locking groove 413 can be inserted into or withdrawn from the first locking groove 413. By setting the movable locking member 510, which includes a first locking piece 515 and a second locking piece 516, and setting the movable locking member 510 on the side of the drive back plate 40 facing the head component 10, the movable locking member 510 can slide and engage with the drive back plate 40 from different sides, and can be inserted into and withdrawn from the first locking groove 413. This makes full use of the space between the head component 10 and the drive back plate 40, as well as the space on different sides of the head component 10, making the structural design of the height adjustment mechanism more compact and the driving efficiency higher.

[0071] In one embodiment of this application, such as Figure 2As shown, the machine head assembly 10 also includes a presser foot mechanism 600, which includes a presser foot 610. The presser foot 610 is used to reciprocate synchronously with the needle tip mechanism 200 and the needle bar assembly 100 during the embroidery period, and to organize the loops on the fabric to improve the embroidery quality. Taking the plane where the upper surface of the fabric is located as the working surface, during the embroidery period, when the presser foot 610 descends, it can organize the loops of the stitches based on the upper surface of the fabric. When the presser foot 610 rises, the fabric can be moved or turned. Furthermore, the machine head assembly 10 may include a composite drive assembly 300. The needle bar 110, the needle tip bar 210, and the presser foot 610 are all connected to the composite drive assembly 300. During the embroidery period, the composite drive assembly 300 synchronously drives the needle bar assembly 100, the needle tip mechanism 200, and the presser foot mechanism 600 to reciprocate, so as to embroider the fabric.

[0072] The drive assembly 20 also includes a third drive mechanism connected to the presser foot 610, which drives the presser foot 610 to rise and fall during non-embroidery periods. Thus, during non-embroidery periods, the needle 120, needle tip 220, and presser foot 610 are all raised and moved away from the work surface, increasing the space above the work surface to facilitate the corresponding operations on the fabric. After the fabric operation is completed, the needle 120, needle tip 220, and presser foot 610 are lowered to the initial embroidery position, allowing the composite drive assembly 300 to drive the needle tip mechanism 200, needle bar assembly 100, and presser foot mechanism 600 to move up and down again during embroidery periods.

[0073] It should be noted that the first drive mechanism, the second drive mechanism, and the third drive mechanism can be driven by the same power source, or they can be driven by independent power sources respectively. For example, in one embodiment, the drive assembly 20 includes a first driver 21, and the first drive mechanism, the second drive mechanism, and the third drive mechanism are all connected to the first driver 21. The first driver 21 drives the needle bar 110, the needle tip bar 210, and the presser foot 610 to rise and fall through the first drive mechanism, the second drive mechanism, and the third drive mechanism; that is, the lifting of the needle 120, the needle tip 220, and the presser foot 610 are all driven by the same power source.

[0074] Alternatively, in another embodiment, the drive assembly 20 includes a first driver 21, a second driver 22, and a third driver. The first driver 21 is connected to a first drive mechanism, the second driver 22 is connected to a second drive mechanism, and the third driver is connected to a third drive mechanism. The first driver 21, the second driver 22, and the third driver drive the needle bar 110, the needle tip bar 210, and the presser foot 610 to rise and fall through the first drive mechanism, the second drive mechanism, and the third drive mechanism, respectively. That is, the lifting of the needle 120, the needle tip 220, and the presser foot 610 is equipped with an independent power source.

[0075] Alternatively, in another embodiment, the drive assembly 20 includes a first driver 21 and a second driver 22. The first drive mechanism and the third drive mechanism are both connected to the first driver 21, and the second drive mechanism is connected to the second driver 22. The first driver 21 and the second driver 22 can drive the needle bar 110, the needle tip bar 210 and the presser foot 610 to rise and fall through the first drive mechanism, the second drive mechanism and the third drive mechanism; that is, the lifting of the needle tip 220 and the presser foot 610 is driven by the same power source, and the lifting of the needle 120 is driven by a separate power source.

[0076] It should be noted that the lifting of the needle 120, needle tip 220, and presser foot 610 can be performed synchronously or sequentially. For example, the first drive mechanism, the second drive mechanism, and the third drive mechanism can be driven by the same power source, so that the needle 120, needle tip 220, and presser foot 610 are lifted synchronously; or, the first drive mechanism, the second drive mechanism, and the third drive mechanism can be driven by independent power sources, so that the needle 120, needle tip 220, and presser foot 610 are lifted sequentially in a preset order; the first drive mechanism and the third drive mechanism can be driven by the same power source, while the second drive mechanism can be driven by an independent power source, so that the needle tip 220 and presser foot 610 are lifted synchronously, and the needle 120 is lifted individually.

[0077] Furthermore, in the case where the needle tip 220 and presser foot 610 rise simultaneously, while the needle 120 rises independently, the needle 120 can be raised above the needle tip 220 and presser foot 610, making it higher than the needle tip 220 and presser foot 610, to facilitate needle 120 replacement during non-embroidery periods. Of course, needle 120 replacement can also be set during the stage where the needle 120 is raised upwards while the needle tip 220 and presser foot 610 are paused; or, during the stage where the needle 120 is raised to its highest point while the needle tip 220 and presser foot 610 are at their lowest point.

[0078] like Figure 7 and Figure 9In the illustrated embodiment, the drive assembly 20 includes a first driver 21 and a drive gear 202, the third drive mechanism includes a second cam pin mechanism, the drive gear 202 is configured with a first actuator 201, and the drive gear 202 is connected to the presser foot 610 through the second cam pin mechanism; the needle tip mechanism 200 includes a needle tip support 230, the needle tip support 230 is connected to the needle tip rod 210, the needle tip support 230 is configured with a needle tip support engagement portion 231 that engages with the first actuator 201, and the first actuator 201 can lift the needle tip support engagement portion 231 upward. Therefore, when the first driver 21 drives the drive gear 202 to rotate, the drive gear 202 drives the second cam pin mechanism to move, so that the presser foot 610 is lifted, and the needle tip support engagement part 231 is lifted by the first actuator 201, so that the needle tip 220 is lifted. The lifting of the needle tip 220 and the needle 120 are both achieved by the first driver 21 driving the drive gear 202, which improves the structural integration and motion efficiency of the height adjustment mechanism.

[0079] For example, in one embodiment, the presser foot mechanism 600 includes a presser foot drive plate 620, which is vertically movably mounted on the frame 50 or the head bracket 11. One end of the presser foot drive plate 620 is connected to the presser foot 610. The second cam pin mechanism includes an eccentric protrusion disposed on the side of the drive gear 202 facing the movable locking member 510. The eccentric protrusion is eccentrically disposed relative to the rotation axis of the drive gear 202. The presser foot drive plate 620 is provided with a contour groove that slides with the eccentric protrusion. The eccentric protrusion is slidably disposed in the contour groove. When the drive gear 202 is driven to rotate by the first driver 21, the eccentric protrusion moves with the rotation of the drive gear 202. While the eccentric protrusion moves along the contour groove, it abuts against the groove wall of the contour groove and pushes the presser foot drive plate 620 to move, so that the presser foot 610 is lifted.

[0080] Alternatively, in another embodiment, the height adjustment mechanism further includes a drive back plate 40, and the second cam pin mechanism includes a second eccentric profile 203 constructed on the drive gear 202 and a second pin protrusion 621 constructed on the pressure foot drive plate 620. The second eccentric profile 203 is located on one side of the drive gear 202 axially, for example, the second eccentric profile 203 is located between the drive gear 202 and the drive back plate 40, and protrudes toward the drive back plate 40 relative to the end face of the drive gear 202. The second pin protrusion 621 abuts against the second eccentric profile 203, and the second eccentric profile 203 moves with the rotation of the drive gear 202 and pushes the second pin protrusion 621 up and down to lift the pressure foot 610.

[0081] Specifically, in one embodiment, the presser foot drive plate 620 includes a plate body 622, a first drive arm 623, and a second drive arm 624. The plate body 622 is vertically slidably connected to the drive back plate 40. A second cam pin mechanism is located between the drive gear 202 and the plate body 622. Both the first drive arm 623 and the second drive arm 624 are connected to the plate body 622, with the second drive arm 624 located above the first drive arm 623. The first drive arm 623 is used to connect to the presser foot 610, and the second drive arm 624 is used to connect to the composite drive assembly 300. Thus, during the embroidery period, the composite drive assembly 300, in conjunction with the second drive arm 624, causes the presser foot mechanism 600 to reciprocate. During non-embroidery periods, the drive gear 202, in conjunction with the plate body 622, causes the presser foot mechanism 600 to be lifted.

[0082] The presser foot mechanism 600 also includes a presser foot bracket 630 and a second elastic element 640. The presser foot bracket 630 is fixed, and the presser foot 610 is vertically and movably mounted on the presser foot bracket 630. The second elastic element 640 acts on the presser foot 610 and the presser foot bracket 630 to return the presser foot 610 to the working surface. Specifically, the upper end of the second elastic element 640 is connected to the presser foot bracket 630, and the lower end is connected to the presser foot 610. When the presser foot 610 is raised during non-embroidery periods, the presser foot 610 moves relative to the presser foot bracket 630 and moves upward away from the working surface. The second elastic element is compressed and contracts. After the fabric is changed, the second drive arm 624 removes the upward lifting force on the presser foot 610, and the second elastic element releases its elastic force, causing the presser foot 610 to move downward and return to the working surface.

[0083] Furthermore, such as Figure 7 As shown, the locking mechanism 500 also includes a main gear 540, a locking gear 520, and a drive gear 202, all of which mesh with the main gear 540. The main gear 540, the locking gear 520, and the drive gear 202 are located on the same side of the drive back plate 40. The first driver 21 is located on the opposite side of the drive back plate 40. The first driver 21 is connected to the main gear 540 and directly drives the main gear 540 to rotate, so that the drive gear 202 and the locking gear 520 rotate synchronously. In this way, the drive gear 202 and the locking gear 520 are driven simultaneously by the same power source, so that the locking and unlocking actions of the movable locking member 510 on the relative rotation of the needle bar 110 and the sleeve 130 are coordinated with the lifting of the needle nozzle 220 and the pressure foot 610.

[0084] Understandably, by adjusting the transmission ratio between the main gear 540 and the locking gear 520, and the transmission ratio between the main gear 540 and the drive gear 202, the timing of the movement of the movable locking member 510, the presser foot drive plate 620, and the first actuator 201 can be controlled, so that the lifting of the needle 120, the needle tip 220, and the presser foot 610 is synchronized.

[0085] In one specific embodiment, the head assembly 10 includes a first driver 21 and a second driver 22. The first driver 21 is connected to the main gear 540, and both the locking gear 520 and the driving gear 202 mesh with the main gear 540. The first driver 21 drives the main gear 540, which in turn causes the locking gear 520 and the driving gear 202 to rotate synchronously. The second driver 22 is connected to one end of the central shaft 30, and the other end of the central shaft 30 is connected to the rod sleeve 130. The second driver 22 drives the rod sleeve 130 to rotate through the central shaft 30. The needle bar assembly 100, the needle tip mechanism 200, and the presser foot mechanism 600 are all vertically movably connected to the head support 11. The needle bar assembly 100, the needle tip mechanism 200, and the presser foot mechanism 600 are all connected to the composite drive assembly 300.

[0086] During the embroidery period, the composite drive assembly 300 drives the needle bar assembly 100, the needle tip mechanism 200, and the presser foot mechanism 600 to reciprocate periodically to embroider the fabric. During the non-embroidery period, the first driver 21 drives the main gear 540, and the second driver 22 drives the central shaft 30. The main gear 540 rotates under the drive of the first driver 21, causing the locking gear 520 to rotate synchronously with the drive gear 202. When the locking gear 520 rotates, it drives the movable locking member 510 to move through the first cam pin mechanism. The movable locking member 510 moves into the first locking groove 413 and pushes the locking member to move, causing the protrusion 421 to exit the second locking groove 131. The relative rotation between the needle bar 110 and the sleeve 130 is unlocked. At this time, the sleeve 130 can be driven by the central shaft 30 to rotate, and at the same time, the needle bar 110 moves up and down, so that the needle bar 110 is lifted. After the locking gear 520 stops driving the movable locking member 510, during the embroidery period, the movable locking member 510 is subjected to the elastic force of the locking elastic member 530 and exits the first locking groove 413. The protrusion 421 returns to the second locking groove 131. The relative rotation between the needle bar 110 and the sleeve 130 is a locking action. At this time, the sleeve 130 is driven by the central shaft 30 and rotates synchronously with the needle bar 110 to adjust the orientation of the needle hook of the machine needle 120.

[0087] Simultaneously, the drive gear 202 drives the presser foot drive plate 620 to move relative to the drive back plate 40 via the second cam pin mechanism, causing the presser foot 610 to be lifted. The drive gear 202 also lifts the needle tip 220 by pushing the needle tip support engagement portion 231 via the first actuator 201. Thus, the first driver 21 and the second driver 22 operate simultaneously, coordinating with the locking gear 520 and locking mechanism 500, and the linkage between the presser foot drive plate 620, the needle tip support engagement portion 231, and the drive gear 202, achieving the lifting of the needle 120, the needle tip 220, and the presser foot 610 during non-embroidery periods. After the drive gear 202 removes its drive on the needle tip support engagement portion 231 and the presser foot drive plate 620, the needle tip support engagement portion 231 is subjected to the elastic force of the first elastic element, causing the needle tip 220 to return to the working surface, and the presser foot 610 is subjected to the elastic force of the second elastic element, returning to the working surface.

[0088] An embroidery machine is also provided in the embodiments of this application, see reference. Figure 10 The embroidery machine includes the height adjustment mechanism described above, as well as a frame 50 and an embroidery frame 60. The frame 50 includes a base 51 extending along a first direction, a column 52 extending upward from the head end of the base 51, and a machine arm 53 extending along the first direction from the upper end of the column 52. The height adjustment mechanism is installed on the machine arm 53 and is located above the base 51. The embroidery frame 60 is detachably installed on the frame 50 and is located on the upper side of the base 51. The embroidery frame 60 is used to fix the fabric to be embroidered.

[0089] The embroidery frame 60 is used to fix the fabric and other items to be embroidered. During the embroidery period, the embroidery frame 60 is mounted on the frame 50, and the fabric is embroidered in a flat state to ensure the embroidery quality. When it is necessary to change the fabric, the embroidery frame 60 needs to be removed from the frame 50. Since the embroidery frame 60 is usually located below the needle 120, but the space under the needle 120 is small, it is not conducive to the removal and installation of the embroidery frame 60. In this application, by setting a height adjustment mechanism, the needle bar assembly 100, the needle tip mechanism 200 and the presser foot mechanism 600 can be raised during non-embroidery periods, providing sufficient operating space for the removal and installation of the embroidery frame 60.

[0090] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments, and various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention. Furthermore, the embodiments of the present invention and the features thereof can be combined with each other unless otherwise specified.

Claims

1. A height adjustment mechanism, characterized in that, include: The head assembly includes a needle bar assembly and a needle tip mechanism. The needle bar assembly includes a needle bar and a needle mounted on the lower end of the needle bar. The needle tip mechanism includes a needle tip rod and a needle tip mounted on the lower end of the needle tip rod. A drive assembly for lifting the needle bar assembly and the needle tip mechanism during non-embroidery periods. The drive assembly includes a first drive mechanism and a second drive mechanism. The first drive mechanism is connected to the needle tip bar and is capable of driving the needle tip bar to rise and fall. The second drive mechanism is connected to the needle bar and is capable of driving the needle bar to rise and fall.

2. The height adjustment mechanism according to claim 1, characterized in that, The drive assembly includes a first driver, and both the first drive mechanism and the second drive mechanism are connected to the first driver. The first driver drives the needle bar and the needle tip bar to rise and fall through the first drive mechanism and the second drive mechanism. Alternatively, the drive assembly includes a first driver and a second driver, the first driver being connected to the first drive mechanism and the second driver being connected to the second drive mechanism, the first driver and the second driver being able to drive the needle bar and the needle tip bar to rise and fall respectively through the first drive mechanism and the second drive mechanism.

3. The height adjustment mechanism according to claim 1, characterized in that, The drive assembly includes a first driver, the first drive mechanism includes a first actuator, the first driver is connected to the first actuator and is used to drive the first actuator to rotate or lift, the needle tip mechanism includes a needle tip support, the needle tip support is connected to the needle tip rod, the first actuator is connected to the needle tip support, and the first actuator is capable of lifting the needle tip.

4. The height adjustment mechanism according to claim 3, characterized in that, The first drive mechanism further includes a drive gear, the first driver drives the drive gear to rotate, the needle holder is configured with a needle holder engagement portion that engages with the first actuator, the first actuator is an extension portion configured on the side of the drive gear, and the first actuator is capable of pushing the needle holder engagement portion upward.

5. The height adjustment mechanism according to claim 3, characterized in that, The needle tip mechanism further includes a first elastic element, and the head component further includes a head support. The needle bar and the needle tip bar are both vertically movably connected to the head support. The head support is in a fixed state. The first elastic element acts on the needle tip support and the head support to reset the needle tip towards the working surface.

6. The height adjustment mechanism according to claim 1, characterized in that, The needle bar assembly further includes a sleeve, and the drive assembly further includes a locking mechanism. A portion of the needle bar is inserted into the inside of the sleeve and threadedly connected to the sleeve. The locking mechanism is used to lock or unlock the relative rotation of the needle bar and the sleeve. The second drive mechanism includes a central shaft connected to the sleeve and capable of driving the sleeve to rotate, and the needle can change its height in response to the rotation of the sleeve.

7. The height adjustment mechanism according to claim 6, characterized in that, The locking mechanism includes a locking element, a locking block, and a spring. The locking element has an axial channel, a radially extending groove, a first locking groove formed on the outer wall at one end of the groove, and a slot formed at the other end of the groove. A second locking groove is formed on the outer side of the upper end of the sleeve. The locking block is assembled in the groove and has a protrusion that cooperates with the second locking groove. The pin bar and the locking block are vertically movably adapted to each other. The spring is assembled in the slot and elastically acts on the locking block to move towards the first locking groove and cooperate with the second locking groove. In response to the insertion of the first locking groove into the unlocking object pushing the locking block to disengage the tab from the second locking groove, the needle can change its height in response to the rotation of the sleeve.

8. The height adjustment mechanism according to claim 7, characterized in that, The locking block has an anti-rotation limiting hole, and the upper part of the needle bar is configured to be adapted to the anti-rotation limiting hole only in an axial direction. The upper end of the needle bar passes through the anti-rotation limiting hole and is restricted from leaving the anti-rotation limiting hole by an end plate.

9. The height adjustment mechanism according to claim 6, characterized in that, The needle bar assembly also includes a height adjustment gear that is non-rotatably mounted on the bar sleeve, and a transmission gear is provided at the end of the central shaft, with the height adjustment gear coupled to the transmission gear.

10. The height adjustment mechanism according to claim 7, characterized in that, The drive assembly includes a first driver and a locking mechanism. The locking mechanism includes a movable locking member. Both the movable locking member and the first drive mechanism are connected to the first driver. In response to the drive of the first driver, the first drive mechanism drives the needle rod to rise and fall, and the movable locking member inserts into the first locking groove and pushes the locking block to disengage it from the second locking groove. In response to the central shaft driving the rod sleeve to rotate, the height of the needle is adjusted.

11. The height adjustment mechanism according to claim 10, characterized in that, The locking mechanism further includes a locking gear and a first cam pin mechanism disposed between the locking gear and the movable locking member. The first driver drives the locking gear to rotate, thereby driving the movable locking member to move through the first cam pin mechanism.

12. The height adjustment mechanism according to claim 11, characterized in that, The first cam pin mechanism includes a first eccentric profile formed on the locking gear and a first pin protrusion formed on the movable locking member.

13. The height adjustment mechanism according to claim 11, characterized in that, The height adjustment mechanism further includes a drive back plate. The movable locking member, the locking gear, and the first driver are mounted on the drive back plate. The movable locking member and the drive back plate are movably connected by one or more linear guide rail structures. The movable locking member and the drive back plate are connected by a locking elastic member. The locking elastic member provides a force to the movable locking member away from the first locking groove.

14. The height adjustment mechanism according to any one of claims 1 to 13, characterized in that, The machine head component also includes a presser foot mechanism, which includes a presser foot. The drive assembly includes a third drive mechanism, which is connected to the presser foot and is used to drive the presser foot to rise and fall.

15. The height adjustment mechanism according to claim 14, characterized in that, The drive assembly includes a first driver, and the first drive mechanism, the second drive mechanism, and the third drive mechanism are all connected to the first driver. The first driver drives the needle bar, the needle tip bar, and the presser foot to rise and fall through the first drive mechanism, the second drive mechanism, and the third drive mechanism. Alternatively, the drive assembly includes a first driver, a second driver, and a third driver. The first driver is connected to the first drive mechanism, the second driver is connected to the second drive mechanism, and the third driver is connected to the third drive mechanism. The first driver, the second driver, and the third driver drive the needle bar, the needle tip bar, and the presser foot to rise and fall through the first drive mechanism, the second drive mechanism, and the second drive mechanism, respectively. Alternatively, the drive assembly includes a first driver and a second driver, with the first drive mechanism and the third drive mechanism both connected to the first driver, and the second drive mechanism connected to the second driver. The first driver and the second driver can drive the needle bar, the needle tip bar, and the presser foot to rise and fall through the first drive mechanism, the second drive mechanism, and the second drive mechanism.

16. The height adjustment mechanism according to claim 14, characterized in that, The drive assembly further includes a first driver and a drive gear, the drive gear having a first actuation part; the needle tip mechanism includes a needle tip support, the needle tip support being connected to the needle tip rod, the needle tip support having a needle tip support engagement part engaging with the first actuation part, the first actuation part being able to push the needle tip support engagement part upward. The first driver drives the drive gear to rotate, thereby driving the pressure foot to lift via the second cam pin mechanism, and lifting the needle tip via the first actuator.

17. The height adjustment mechanism according to claim 16, characterized in that, The presser foot mechanism includes a presser foot drive plate, which is vertically and movably mounted on the head bracket or frame. The presser foot drive plate is equipped with a first drive arm, which is used to connect the presser foot. The second cam pin mechanism is located between the drive gear and the presser foot drive plate.

18. The height adjustment mechanism according to claim 17, characterized in that, The second cam pin mechanism includes a second eccentric profile formed on the drive gear and a second pin protrusion formed on the pressure foot drive plate.

19. The height adjustment mechanism according to claim 14, characterized in that, The presser foot mechanism further includes a presser foot bracket and a second elastic element. The presser foot bracket is fixed, and the presser foot is vertically and movably mounted on the presser foot bracket. The second elastic element acts on the presser foot and the presser foot bracket to reset the presser foot toward the working surface.

20. An embroidery machine, characterized in that, Includes the height adjustment mechanism according to any one of claims 1 to 19; further includes: The frame includes a base extending along a first direction, a column extending upward from the front end of the base, and a machine arm extending along the first direction from the upper end of the column; the height adjustment mechanism is mounted on the machine arm and located above the base. An embroidery frame is detachably mounted on the machine frame. The embroidery frame is located on the upper side of the machine base and is used to fix the fabric to be embroidered.

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