Automatic thread pressing device for embroidery machine and embroidery machine

Abstract

The utility model discloses an automatic thread pressing device for an embroidery machine and the embroidery machine, and aims to provide the automatic thread pressing device for the embroidery machine and the embroidery machine, which can automatically adjust the pressing force of embroidery threads according to requirements, effectively improve the adjustment accuracy and consistency of the tightness of the embroidery threads, improve the quality of embroidery products and reduce the labor cost. The thread adjusting device comprises a thread adjusting unit, the thread adjusting unit comprises a fixed thread pressing surface and a thread adjusting device, the thread adjusting device comprises two thread adjusting assemblies which are distributed up and down, and each thread adjusting assembly comprises a movable movable thread pressing sheet and an elastic element which drives the movable thread pressing sheet to be separated from the fixed thread pressing surface; the automatic driving device is used for driving the movable thread pressing sheet of the thread adjusting device to move towards the fixed thread pressing surface, so that the embroidery thread of the embroidery machine is tightly pressed between the movable thread pressing sheet and the fixed thread pressing surface.

Description

Technical Field

[0001] The utility model relates to the field of embroidery machines, in particular to an automatic thread pressing device for embroidery machines and the embroidery machine. Background Art

[0002] With the development of embroidery machines, the number of heads has continued to increase. Currently, multi-station embroidery machines feature dozens or even hundreds of heads, arranged in a row. Each head includes a needle bar holder, which holds a row of needles. The thread threading the needles in an embroidery machine must maintain the appropriate tension—neither too tight nor too loose. If the thread is too tight, it will pull the fabric loose during the embroidery process, even creating holes and affecting the quality of the embroidery. If the thread is too loose, the embroidery pattern will become loose, seriously reducing the quality of the embroidery.

[0003] In order to solve the above problems, the current embroidery machine uses a thread presser on the needle bar frame. Each embroidery needle corresponds to a thread presser. The thread presser includes a thread presser knob. The embroidery thread corresponding to the embroidery needle first passes through the corresponding thread presser and then passes through the corresponding embroidery needle. The current thread presser is adjusted by the operator manually rotating the thread presser knob to adjust the pressing force of the thread presser on the embroidery thread, thereby adjusting the tightness of the embroidery thread. The current embroidery machine uses a manual thread presser to manually adjust the tightness of the embroidery thread. Although it can solve the problem of embroidery thread tightness to a certain extent, it has the following shortcomings:

[0004] The tightness of the embroidery thread depends on manual adjustment by the operator, but manual adjustment has the problems of low adjustment efficiency, poor consistency of the embroidery thread tightness adjustment, and the inability to guarantee the quality of the embroidery product; there is also the problem of high labor costs.

[0005] On the other hand, the use of a thread crimper to manually adjust the tightness of the embroidery thread is suitable for use in traditional embroidery machines with fewer heads (3-6 heads). Traditional embroidery machines have fewer heads and fewer thread crimpers, and operators can manually adjust the tightness of the embroidery thread to adapt to the production rhythm. However, with the development of embroidery machines, there are dozens or even hundreds of heads in multi-station embroidery machines, and hundreds or even thousands of embroidery needles (the number of thread crimpers is the same as that of embroidery needles). In this case, manually adjusting the tightness of the embroidery thread is simply unable to adapt to the production rhythm. Therefore, the current method of manually adjusting the tightness of the embroidery thread with a thread crimper is becoming increasingly unable to meet the usage needs of current multi-station embroidery machines. Utility Model Content

[0006] The purpose of the utility model is to provide an automatic thread pressing device for an embroidery machine and an embroidery machine that can automatically adjust the pressing force of the embroidery thread according to needs, effectively improving the accuracy and consistency of the adjustment of the tightness of the embroidery thread, thereby improving the quality of embroidery products and reducing labor costs.

[0007] The technical solution of the utility model is:

[0008] An automatic thread pressing device for an embroidery machine, comprising:

[0009] The wire adjustment unit includes a constant pressure wire surface and a wire adjustment device. The wire adjustment device includes two wire adjustment components distributed in an upper and lower manner. The wire adjustment component includes a movable dynamic wire pressure piece and an elastic element that drives the dynamic wire pressure piece to separate from the constant pressure wire surface.

[0010] The automatic driving device drives the dynamic thread pressing piece of the thread adjusting device to move toward the fixed thread pressing surface, so that the embroidery thread of the embroidery machine is pressed tightly between the dynamic thread pressing piece and the fixed thread pressing surface. The specific working of the automatic thread pressing device for embroidery machines of this scheme is as follows:

[0011] The automatic drive device drives the dynamic thread pressure piece of the thread adjustment device toward the fixed thread pressure surface, thereby pressing the embroidery machine's thread tightly between the dynamic thread pressure piece and the fixed thread pressure surface. The automatic drive device automatically drives the dynamic thread pressure piece and accurately controls the pressing force between the fixed thread pressure surface and the dynamic thread pressure piece, thereby effectively improving the accuracy and consistency of thread tension adjustment, thereby enhancing the quality of embroidery products. Furthermore, since manual thread tension adjustment is unnecessary, the system is well suited to the needs and production schedules of current multi-station embroidery machines and reduces labor costs.

[0012] Preferably, the automatic drive device comprises:

[0013] Two swing arms, one end of the two swing arms is fixed on the same rotating part, one swing arm corresponds to a line adjusting component in the line adjusting device, and the other swing arm corresponds to another line adjusting component in the line adjusting device;

[0014] The wire pressing motor drives the rotating part to rotate. When the wire pressing motor drives the rotating part to rotate, one of the swing arms pushes the dynamic wire pressing piece of the corresponding wire adjusting component to move toward the fixed wire pressure surface; the other swing arm rotates in the direction away from the fixed wire pressure surface of the corresponding wire adjusting component. If one of the two wire adjusting components of the wire adjusting device works, the other wire adjusting component does not work (there is no such thing as two wire adjusting components of the wire adjusting device working at the same time. The working of the wire adjusting component means that the swing arm pushes the dynamic wire pressing piece of the corresponding wire adjusting component to move toward the fixed wire pressure surface and presses against the fixed wire pressure surface. The non-working of the wire adjusting component means that there is a gap between the dynamic wire pressing piece and the fixed wire pressure surface). Based on this, the following working mode control can be conveniently implemented in actual work: if the upper wire adjusting component of the wire adjusting device works, the lower wire adjusting component does not work; if the lower wire adjusting component of the wire adjusting device works, the upper wire adjusting component does not work, so as to meet actual work needs. In addition, the automatic drive device of this scheme only needs one wire pressing motor to realize the above-mentioned working mode control, which can reduce costs and simplify the control program.

[0015] Preferably, the automatic drive device comprises:

[0016] Two swing arms, each having a rotating portion fixed at one end thereof, wherein one swing arm corresponds to a line-adjusting assembly in the line-adjusting device, and the other swing arm corresponds to another line-adjusting assembly in the line-adjusting device;

[0017] Two wire pressing motors correspond to the swing arms one by one. The wire pressing motors drive the corresponding swing arms to rotate through the rotating parts, thereby pushing the dynamic wire pressing pieces of the corresponding wire adjusting components to move toward the fixed wire pressing surface. In this way, the specific working mode can be selected according to actual needs. For example, in one working mode, the upper wire adjusting component of the wire adjusting device is working while the lower wire adjusting component is not working; or when the lower wire adjusting component of the wire adjusting device is working, the upper wire adjusting component is not working, so as to meet actual working needs; in another working mode, the two wire adjusting components of the wire adjusting device are working simultaneously to meet actual working needs.

[0018] Preferably, the swing arm includes a swing arm spring, a limiter, and a fixed arm and a rotating arm that are hingedly connected. One end of the fixed arm is fixedly connected to the rotating part, and the limiter is arranged on the fixed arm or the rotating arm. The rotating arm is pressed against the limiter under the action of the swing arm spring, and the swing arm pushes the dynamic pressure wire sheet of the corresponding line adjustment assembly to move toward the fixed pressure line surface through the rotating arm. In this way, after the swing arm pushes the dynamic pressure wire sheet of the corresponding line adjustment assembly to press against the fixed pressure line surface, the pressure wire motor can continue to drive the fixed arm to rotate, which plays a buffering role. At the same time, it can also increase the force of the swing arm spring acting on the dynamic pressure wire sheet through the rotating arm to increase the clamping force between the fixed pressure line surface and the dynamic pressure wire sheet, so as to achieve accurate adjustment of the clamping force between the pressure line surface and the dynamic pressure wire sheet by controlling the rotation angle of the fixed arm.

[0019] Preferably, the end of the swing arm is provided with a roller. In this way, the swing arm pushes the dynamic wire pressing piece of the corresponding wire adjustment assembly to move through the roller, thereby reducing friction.

[0020] Preferably, the automatic drive device includes two drive actuators, one of which corresponds to a line adjusting component in the line adjusting device, and the other corresponds to another line adjusting component in the line adjusting device; the drive actuators are electric cylinders or electric push rods or push-pull electromagnets or air cylinders. The drive actuators can independently drive the dynamic pressure piece of the line adjusting component to move toward the fixed pressure line surface. In this way, a specific working mode can be selected according to actual needs. For example, in one working mode, the upper line adjusting component of the line adjusting device works, and the lower line adjusting component does not work; the lower line adjusting component of the line adjusting device works, and the upper line adjusting component does not work, so as to meet actual working needs; in another working mode, the two line adjusting components of the line adjusting device work simultaneously to meet actual working needs.

[0021] Preferably, the wire adjustment assembly further comprises a guide member having a guide hole and a guide rod slidably disposed within the guide hole. The dynamic wire pressure piece is disposed on one end of the guide rod facing the constant wire pressure surface. The other end of the guide rod is provided with an end plate, and the elastic element is disposed between the guide hole and the end plate. This ensures that the dynamic wire pressure piece can slide stably along the guide hole, and the elastic element allows the dynamic wire pressure piece to separate from the constant wire pressure surface under the action of the elastic element.

[0022] Preferably, the thread adjusting unit also includes a thread adjusting rack, the constant pressure line surface is arranged on the thread adjusting rack, and an embroidery thread guide structure is provided on the thread adjusting rack, the embroidery thread of the embroidery machine is guided through the embroidery thread guide structure, and the embroidery threads passing through the embroidery thread guide structure on the thread adjusting rack are distributed in sequence along the moving direction of the needle bar rack, and the embroidery threads and the dynamic pressure line plate are located on the same side of the constant pressure line surface; the thread adjusting rack moves synchronously with the needle bar rack of the embroidery machine, so that the thread adjusting device corresponds to each embroidery thread in sequence, and the automatic driving device drives the dynamic pressure line plate of the thread adjusting device to move toward the constant pressure line surface, so that the corresponding embroidery thread is pressed tightly between the dynamic pressure line plate and the constant pressure line surface. At present, a row of embroidery needles are generally arranged on the needle bar frame of the existing embroidery machine. The embroidery machine drives the needle bar frame to move horizontally through the color changing system of the embroidery machine to realize the operation of different embroidery needles on the needle bar frame (different embroidery needles correspond to embroidery threads of different colors); the thread adjusting frame of this scheme moves synchronously with the needle bar frame, thereby driving the embroidery thread guide structure on the thread adjusting frame and the corresponding embroidery thread to move synchronously with the needle bar frame, so that the thread adjusting device corresponds to each embroidery thread in turn; then, the automatic driving device drives the dynamic thread pressure piece of the thread adjusting device to move toward the fixed pressure line surface, so that the corresponding embroidery thread is pressed between the dynamic thread pressure piece and the fixed pressure line surface. Based on this, each thread adjusting unit only needs one thread adjusting device and one automatic driving device to automatically adjust the pressing force of each embroidery thread. There is no need for each embroidery thread to correspond to a thread adjusting device and an automatic driving device, which can effectively reduce the number of thread adjusting devices and automatic driving devices, thereby reducing the production cost.

[0023] Preferably, the thread adjusting unit also includes a thread adjusting rack, the constant pressure line surface is arranged on the thread adjusting rack, and an embroidery thread guide structure is provided on the thread adjusting rack, the embroidery thread of the embroidery machine is guided through the embroidery thread guide structure, and the embroidery threads passing through the embroidery thread guide structure on the thread adjusting rack are distributed in sequence along the moving direction of the needle bar rack, and the embroidery threads and the dynamic pressure line plate are located on the same side of the constant pressure line surface; the thread adjusting device and the automatic driving device move synchronously with the needle bar rack of the embroidery machine, so that the thread adjusting device corresponds to each embroidery thread in sequence, and the automatic driving device drives the dynamic pressure line plate of the thread adjusting device to move toward the constant pressure line surface, so that the corresponding embroidery thread is pressed tightly between the dynamic pressure line plate and the constant pressure line surface. At present, a row of embroidery needles are generally arranged on the needle bar frame of the existing embroidery machine. The embroidery machine drives the needle bar frame to move horizontally through the embroidery machine color changing system to realize the operation of different embroidery needles on the needle bar frame (different embroidery needles correspond to embroidery threads of different colors); this solution synchronizes the movement of the thread adjusting device and the automatic driving device with the needle bar frame of the embroidery machine, so that the thread adjusting device corresponds to each embroidery thread in turn; then, the automatic driving device drives the dynamic thread pressure piece of the thread adjusting device to move toward the fixed pressure line surface, so that the corresponding embroidery thread is pressed between the dynamic thread pressure piece and the fixed pressure line surface. Based on this, each thread adjusting unit only needs one thread adjusting device and one automatic driving device to automatically adjust the pressing force of each embroidery thread. There is no need for each embroidery thread to correspond to a thread adjusting device and an automatic driving device, which can effectively reduce the number of thread adjusting devices and automatic driving devices, thereby reducing the production cost.

[0024] Preferably, the same thread adjusting unit has multiple thread adjusting devices, and the thread adjusting devices are distributed side by side along the moving direction of the needle bar frame of the embroidery machine; the automatic driving device corresponds to the thread adjusting device one by one.

[0025] Preferably, the electronic thread take-up spring for tightening the embroidery thread includes a thread take-up hook and a thread take-up motor that drives the thread take-up hook to rotate. The thread take-up hook is located between the two thread adjustment components of the thread adjustment device. This solution uses an electronic thread take-up spring to replace the mechanical thread take-up spring in a traditional embroidery machine. The thread take-up motor can drive the thread take-up hook to rotate to different angles to adjust the tightening force of the thread take-up hook on the embroidery thread. Based on this, the electronic thread take-up spring can adjust the tightening force of the electronic thread take-up spring according to the needs of different embroidery threads to adapt to the needs of different embroidery threads.

[0026] An embroidery machine comprises an automatic thread pressing device for the embroidery machine.

[0027] The beneficial effects of the utility model are that the pressing force of the embroidery thread can be automatically adjusted according to needs, and the accuracy and consistency of adjusting the tightness of the embroidery thread are effectively improved, thereby improving the quality of embroidery products and reducing labor costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 The utility model is a structural diagram of an automatic thread pressing device for an embroidery machine in one embodiment.

[0029] Figure 2 This is a structural schematic diagram of a second embodiment of an automatic thread pressing device for an embroidery machine of the present utility model.

[0030] Figure 3 This is a structural schematic diagram of a third embodiment of an automatic thread pressing device for an embroidery machine of the present utility model.

[0031] Figure 4 The utility model is a partial side view of an automatic thread pressing device for an embroidery machine applied to an embroidery machine.

[0032] Figure 5 The utility model is a three-dimensional partial structural diagram of an automatic thread pressing device for an embroidery machine applied on an embroidery machine.

[0033] In the picture:

[0034] Wire adjustment rack 1;

[0035] Constant pressure line surface 2, constant pressure line sheet 2.1;

[0036] Wire adjustment assembly 3, dynamic wire pressure piece 3.1, elastic element 3.2, guide member 3.3, guide rod 3.4, end plate 3.5;

[0037] Automatic drive device 4, wire pressing motor 4.0, swing arm 4.1, rotating part 4.2, fixed arm 4.3, rotating arm 4.4, swing arm spring 4.5, roller 4.6, driving actuator 4.7;

[0038] Electronic thread take-up spring 5, thread take-up hook 5.1, thread take-up motor 5.2;

[0039] Embroidery thread 6;

[0040] Needle bar frame 7;

[0041] Translation actuator 8. DETAILED DESCRIPTION

[0042] Specific embodiment 1, as Figure 1 、 Figure 2 、 Figure 4 As shown, an automatic thread pressing device for an embroidery machine includes a thread adjusting unit and an automatic driving device 4.

[0043] The wire adjustment unit includes a constant-pressure wire surface 2 and a wire adjustment device. The wire adjustment device includes two wire adjustment assemblies 3, one above the other. The wire adjustment assemblies 3 include a dynamic wire pressure piece 3.1 and an elastic element 3.2. The elastic element 3.2 provides elastic force, driving the dynamic wire pressure piece 3.1 to separate from the constant-pressure wire surface 2.

[0044] The automatic driving device 4 drives the dynamic thread pressure piece 3.1 of the thread adjusting device to move toward the constant pressure line surface 2, so that the embroidery thread 6 of the embroidery machine is pressed tightly between the dynamic thread pressure piece 3.1 and the constant pressure line surface 2.

[0045] The specific operation of the automatic thread pressing device for an embroidery machine in this embodiment is as follows:

[0046] The automatic drive device 4 drives the dynamic thread pressure piece 3.1 of the thread adjustment device toward the constant thread pressure surface 2, thereby pressing the embroidery machine's embroidery thread 6 between the dynamic thread pressure piece 3.1 and the constant thread pressure surface 2. The automatic drive device 4 automatically drives the dynamic thread pressure piece 3.1 and accurately controls the pressing force between the constant thread pressure surface 2 and the dynamic thread pressure piece 3.1. This effectively improves the accuracy and consistency of adjusting the tension of the embroidery thread 6, thereby enhancing the quality of the embroidery product. Furthermore, the system eliminates the need for manual adjustment of the tension of the embroidery thread 6, effectively adapting to the needs and production schedule of current multi-station embroidery machines while reducing labor costs.

[0047] Specifically, such as Figure 1 As shown, the line adjustment unit also includes a line adjustment frame 1. A constant pressure line surface 2 is provided on the line adjustment frame 1. In this embodiment, a constant pressure line piece 2.1 is provided on the line adjustment frame 1. The constant pressure line piece 2.1 and the line adjustment frame 1 are an integrally formed structure, or the constant pressure line piece 2.1 and the line adjustment frame 1 are made separately, and the constant pressure line piece 2.1 is fixed to the line adjustment frame 1 by bolts, rivets, welding, etc. The side surface of the constant pressure line piece 2.1 facing the dynamic pressure line piece 3.1 constitutes the constant pressure line surface 2. In this embodiment, two upper and lower constant pressure line pieces 2.1 are provided on the line adjustment frame 1, wherein the dynamic pressure line piece 3.1 of the upper line adjustment assembly 3 cooperates with the constant pressure line surface 2 of the constant pressure line piece 2.1 located at the upper part, and the dynamic pressure line piece 3.1 of the lower line adjustment assembly 3 cooperates with the constant pressure line surface 2 of the constant pressure line piece 2.1 located at the lower part.

[0048] The line adjustment assembly 3 also includes a guide member 3.3 provided with a guide hole and a guide rod 3.4 slidably arranged in the guide hole. The guide member 3.3, the guide rod 3.4 and the dynamic pressure line piece 3.1 are all located on the same side of the constant pressure line surface 2. In this embodiment, the guide member 3.3 is a guide sleeve. The axis of the guide rod is perpendicular to the constant pressure line surface 2. The dynamic pressure line piece 3.1 is arranged on one end of the guide rod 3.4 facing the constant pressure line surface 2, and the other end of the guide rod 3.4 is provided with an end plate 3.5. The elastic element 3.2 is arranged between the guide hole and the end plate 3.5. The elastic element 3.2 is a spring or an elastic sheet. In this embodiment, the elastic element 3.2 is a spring.

[0049] The automatic driving device 4 drives the dynamic pressure piece 3.1 of the thread adjusting device to move toward the constant pressure line surface 2, so that the embroidery thread 6 of the embroidery machine is pressed tightly between the dynamic pressure piece 3.1 and the constant pressure line surface 2. Specifically,

[0050] In one embodiment, Figure 1 As shown, the automatic drive device 4 includes a wire pressing motor 4.0 and two swing arms 4.1. One end of the two swing arms 4.1 is fixed on the same rotating part 4.2, one swing arm 4.1 corresponds to a wire adjusting component 3 in the same wire adjusting device, and the other swing arm 4.1 corresponds to another wire adjusting component 3 in the same wire adjusting device. In this embodiment, the rotating part 4.2 is a rotating sleeve, and the output shaft of the wire pressing motor 4.0 is connected to the rotating sleeve. Of course, the rotating part 4.2 can also be a rotating shaft or a rotating block. The wire pressing motor 4.0 drives the rotating part 4.2 to rotate, thereby driving the two swing arms 4.1 to rotate. The ends of the swing arms 4.1 are close to or against the end plate.

[0051] When the wire pressing motor 4.0 drives the rotating part 4.2 to rotate, one of the swing arms 4.1 pushes the dynamic wire pressure piece 3.1 of the corresponding wire adjusting assembly 3 to move toward the constant pressure wire surface 2; then the other swing arm 4.1 rotates in the direction of the constant pressure wire surface 2 away from the corresponding wire adjusting assembly 3. In this embodiment, when the wire pressing motor 4.0 drives the rotating part 4.2 to rotate, the specific process of one of the swing arms 4.1 pushing the dynamic wire pressure piece 3.1 of the corresponding wire adjusting assembly 3 to move toward the constant pressure wire surface 2 is as follows: the swing arm 4.1 rests on the end plate, pushing the end plate, the guide rod 3.4 and the dynamic wire pressure piece 3.1 to move along the guide hole toward the constant pressure wire surface 2. In this embodiment, if one of the two wire adjusting assemblies 3 of the same wire adjusting device works, the other wire adjusting assembly 3 does not work (there are no two wire adjusting assemblies 3 of the same wire adjusting device working at the same time). The working of the line adjusting component 3 means that the swing arm 4.1 pushes the dynamic line pressure piece 3.1 of the corresponding line adjusting component 3 toward the constant pressure line surface 2 and presses against the constant pressure line surface 2. The non-working of the line adjusting component 3 means that there is a gap between the dynamic line pressure piece 3.1 and the constant pressure line surface 2. Based on this, the following working mode control can be conveniently implemented in actual work: when the upper line adjusting component 3 of the same line adjusting device works, the lower line adjusting component 3 does not work; when the lower line adjusting component 3 of the same line adjusting device works, the upper line adjusting component 3 does not work, so as to meet actual work needs. In addition, the automatic drive device 4 of this solution only needs one line pressing motor 4.0 to realize the above-mentioned working mode control, which can reduce costs and simplify the control program.

[0052] In another embodiment, Figure 2As shown, the automatic drive device 4 includes two swing arms 4.1 and two wire pressing motors 4.0. A rotating part 4.2 is fixed to one end of each of the two swing arms 4.1, wherein one swing arm 4.1 corresponds to a wire adjusting assembly 3 in the same wire adjusting device, and the other swing arm 4.1 corresponds to another wire adjusting assembly 3 in the same wire adjusting device. The wire pressing motor 4.0 corresponds one-to-one with the swing arm 4.1, and the wire pressing motor 4.0 drives the corresponding swing arm 4.1 to rotate through the rotating part 4.2, thereby pushing the dynamic wire pressing piece 3.1 of the corresponding wire adjusting assembly 3 to move toward the fixed wire pressing surface 2. In this embodiment, the rotating part 4.2 is a rotating sleeve, and the output shaft of the wire pressing motor 4.0 is connected to the rotating sleeve. Of course, the rotating part 4.2 can also be a rotating shaft or a rotating block, etc. The end of the swing arm 4.1 is close to or against the end plate of the corresponding wire adjusting assembly 3. The wire pressing motor 4.0 drives the rotating part 4.2 to rotate, which in turn drives the corresponding swing arm 4.1 to rotate. The swing arm 4.1 rests on the corresponding end plate, pushing the corresponding end plate, the guide rod 3.4 and the dynamic wire pressing piece 3.1 to move along the guide hole toward the fixed wire pressing surface 2. In this way, a specific working mode can be selected according to actual needs. For example, in one working mode, the upper wire adjusting component 3 of the same wire adjusting device is working, while the lower wire adjusting component 3 is not working; in another working mode, the two wire adjusting components 3 of the same wire adjusting device are working at the same time to meet actual work needs.

[0053] Further, such as Figure 1 、 Figure 2 As shown, the end of the swing arm 4.1 is provided with a roller 4.6. In this way, the swing arm 4.1 is pressed against the end plate through the roller 4.6 to push the end plate, the guide rod 3.4 and the dynamic pressure line piece 3.1 along the guide hole toward the fixed pressure line surface 2, thereby reducing friction.

[0054] In this embodiment, the specific structure of the swing arm 4.1 is as follows:

[0055] In one embodiment, Figure 1 、 Figure 2As shown, the swing arm 4.1 includes a swing arm spring 4.5, a stopper, and a hinged fixed arm 4.3 and a pivoting arm 4.4. The fixed arm 4.3 is fixedly connected to the pivoting portion 4.2 along one end of the fixed arm 4.3. The stopper is provided on either the fixed arm 4.3 or the pivoting arm 4.4. The pivoting arm 4.4 abuts against the stopper under the action of the swing arm spring 4.5. The swing arm 4.1, through the pivoting arm 4.4, pushes the dynamic pressure piece 3.1 of the corresponding wire adjustment assembly 3 toward the fixed pressure line surface 2. In this embodiment, the swing arm spring 4.5 is a torsion spring, and the fixed arm 4.3 extends along the rotation axis of the pivoting portion 4.2. In this way, after the swing arm 4.1 pushes the dynamic thread pressure piece 3.1 of the corresponding thread adjusting assembly 3 to press against the fixed thread pressure surface 2, so that the embroidery thread 6 of the embroidery machine is pressed between the dynamic thread pressure piece 3.1 and the fixed thread pressure surface 2, the thread pressure motor 4.0 can continue to drive the fixed arm 4.3 to rotate, which on the one hand plays a buffering role; on the other hand, it can also increase the force of the swing arm spring 4.5 acting on the dynamic thread pressure piece 3.1 through the rotating arm 4.4 to increase the pressing force between the fixed thread pressure surface 2 and the dynamic thread pressure piece 3.1, so as to realize the accurate adjustment of the pressing force between the fixed thread pressure surface 2 and the dynamic thread pressure piece 3.1 by controlling the rotation angle of the fixed arm 4.3.

[0056] In another embodiment, the swing arm 4.1 is an integrated swing arm 4.1 (i.e., the swing arm 4.1 is a single, integral swing arm 4.1, not shown in the figure), and the swing arm 4.1 extends along the rotation axis of the rotating portion 4.2. This facilitates the actual processing and manufacturing of the swing arm 4.1. After the swing arm 4.1 pushes the dynamic pressure line piece 3.1 of the corresponding line adjustment assembly 3 against the fixed pressure line surface 2, the pressing force between the fixed pressure line surface 2 and the dynamic pressure line piece 3.1 is accurately adjusted by adjusting the force applied by the automatic drive device 4 to the swing arm 4.1.

[0057] Specific embodiment 2: The rest of the structure of this embodiment refers to specific embodiment 1, except that:

[0058] In this embodiment, Figure 3As shown, the automatic drive device 4 includes two drive actuators 4.7. One drive actuator 4.7 corresponds to one thread adjustment assembly 3 in the same thread adjustment device, and the other drive actuator 4.7 corresponds to another thread adjustment assembly 3 in the same thread adjustment device. The drive actuator 4.7 is an electric cylinder, electric push rod, push-pull electromagnet, or pneumatic cylinder. The piston rod or push rod of the electric cylinder, electric push rod, push-pull electromagnet, or pneumatic cylinder constituting the drive actuator 4.7 faces the end plate of the corresponding thread adjustment assembly 3. The drive actuator 4.7 pushes the end plate of the corresponding thread adjustment assembly 3, causing the end plate, guide rod 3.4, and dynamic thread pressure plate 3.1 to move along the guide hole toward the constant thread pressure surface 2 until the dynamic thread pressure plate 3.1 contacts the constant thread pressure surface 2, thereby pressing the embroidery machine thread 6 between the dynamic thread pressure plate 3.1 and the constant thread pressure surface 2. After the dynamic pressure line piece 3.1 is pressed against the constant pressure line surface 2, the pressing force between the constant pressure line surface 2 and the dynamic pressure line piece 3.1 is accurately adjusted by adjusting the thrust of the driving actuator 4.7 acting on the end plate.

[0059] In this embodiment, the driving actuator 4.7 can independently drive the dynamic pressure piece 3.1 of the line adjusting assembly 3 to move toward the constant pressure line surface 2. In this way, the specific working mode can be selected according to actual needs. For example, in one working mode, the upper line adjusting assembly 3 of the same line adjusting device works, and the lower line adjusting assembly 3 does not work; the lower line adjusting assembly 3 of the same line adjusting device works, and the upper line adjusting assembly 3 does not work, so as to adapt to actual working needs; in another working mode, the two line adjusting assemblies 3 of the same line adjusting device work at the same time to adapt to actual working needs.

[0060] Specific embodiment 3: The rest of the structure of this embodiment refers to specific embodiment 1 or specific embodiment 2, except that:

[0061] like Figure 1-Figure 5 As shown, the embroidery machine comprises a frame and a plurality of machine heads. Each machine head comprises a needle bar frame 7.

[0062] The thread adjusting unit corresponds to the head of the embroidery machine one to one. Of course, it should be noted that in actual application, the thread adjusting unit of this embodiment can also be applied to a part of the heads of the embroidery machine.

[0063] The thread adjustment stand 1 is provided with an embroidery thread guide structure. The embroidery thread 6 of the embroidery machine is guided through the embroidery thread guide structure. The embroidery threads 6 passing through the embroidery thread guide structure on the thread adjustment stand 1 are distributed in sequence along the moving direction of the needle bar stand 7, and the embroidery threads 6 and the dynamic pressure thread plate 3.1 are located on the same side of the constant pressure thread surface 2. The constant pressure thread surface 2 is parallel to the moving direction of the needle bar stand 7. The embroidery thread guide structure includes a plurality of wire structures distributed in sequence along the moving direction of the needle bar stand 7 of the embroidery machine. The wire structure includes a plurality of wire holes distributed in sequence from top to bottom, at least one of which is located above the dynamic pressure thread plate 3.1 of the upper thread adjustment component 3, and at least one wire hole is located below the dynamic pressure thread plate 3.1 of the lower thread adjustment component 3. Each wire structure corresponds to an embroidery thread 6, and the embroidery thread 6 passes through the wire holes of the corresponding wire structure from top to bottom.

[0064] In this embodiment, the embroidery thread 6 on the thread adjusting frame 1 of the thread adjusting unit corresponds one to one with the embroidery needle on the needle bar frame 7 of the corresponding machine head. The conductive wire structure on the thread adjusting frame 1 corresponds one to one with the embroidery thread 6.

[0065] In this embodiment, the thread adjusting device and automatic drive device 4 of the same thread adjusting unit are both integrated. The thread adjusting device is directly or indirectly mounted on the embroidery machine frame (i.e., the guide member 3.3 is directly or indirectly fixed to the embroidery machine frame), and the automatic drive device 4 is directly or indirectly mounted on the embroidery machine frame. The thread adjusting device and automatic drive device 4 maintain a constant position in the direction of movement of the needle bar frame 7.

[0066] The thread adjusting frame 1 and the needle bar frame 7 of the embroidery machine move synchronously, so that the thread adjusting device corresponds to each embroidery thread 6 on the thread adjusting frame 1 in turn, and the automatic driving device 4 drives the dynamic thread pressure piece 3.1 of the thread adjusting device to move toward the fixed pressure line surface 2, so that the corresponding embroidery thread 6 is pressed tightly between the dynamic thread pressure piece 3.1 and the fixed pressure line surface 2. In this embodiment,

[0067] Currently, a row of embroidery needles are generally arranged on the needle bar frame 7 of existing embroidery machines. The embroidery machine drives the needle bar frame 7 to move horizontally through the embroidery machine color change system to enable different embroidery needles on the needle bar frame 7 to work (different embroidery needles correspond to different colored embroidery threads 6); the thread adjustment frame 1 of this embodiment moves synchronously with the needle bar frame 7, so that the thread adjustment device corresponds to each embroidery thread 6 on the thread adjustment frame 1 in turn, and the automatic drive device 4 drives the dynamic thread pressure piece 3.1 of the thread adjustment device to move toward the fixed pressure surface 2, so that the corresponding embroidery thread 6 is pressed between the dynamic thread pressure piece 3.1 and the fixed pressure surface 2. Based on this, each thread adjustment unit only needs one thread adjustment device and one automatic drive device 4 to automatically adjust the pressing force of each embroidery thread 6. There is no need for each embroidery thread 6 to correspond to a thread adjustment device and an automatic drive device 4. The number of thread adjustment devices and automatic drive devices 4 can be effectively reduced, thereby reducing production costs.

[0068] The specific operation of the automatic thread pressing device for an embroidery machine of this embodiment is as follows. The following description takes the working process of a certain embroidery needle of the embroidery machine head as an example.

[0069] When the needle bar frame 7 is translated to place the embroidery needle in the working position, the thread adjusting frame 1 and the needle bar frame 7 move synchronously to move the embroidery thread 6 corresponding to the embroidery needle to the thread adjusting device;

[0070] Then, the automatic drive device 4 drives the dynamic pressure piece 3.1 of the thread adjusting device to move toward the constant pressure line surface 2, so that the corresponding embroidery thread 6 is pressed between the dynamic pressure piece 3.1 and the constant pressure line surface 2, thereby accurately controlling the tightness of the corresponding embroidery thread 6.

[0071] When the embroidery needle stops working, the automatic driving device 4 is reset, and the corresponding dynamic pressure piece 3.1 is separated from the constant pressure surface 2, returning to the initial state.

[0072] The specific method of synchronous movement of the thread adjusting stand 1 and the needle bar stand 7 of the embroidery machine is as follows:

[0073] In one embodiment, Figure 1 、 Figure 5 As shown, the embroidery machine frame is provided with a translation track that is parallel to the movement direction of the needle bar frame 7. The thread adjustment frame 1 translates along the translation track. The thread adjustment frame 1 is driven by a translation actuator 8. The translation actuator 8 is mounted on the embroidery machine frame. The translation actuator 8 is an electric cylinder, an electric push rod, or a linear module. Of course, it should be noted that the translation actuator can also be other commercially available translation actuators. The thread adjustment frames 1 of multiple thread adjustment units can share the same translation actuator, or each can use an independent translation actuator.

[0074] In another embodiment, the thread adjusting frame 1 is directly fixed to the corresponding needle bar frame 7. For example, the thread adjusting frame 1 is fixed to the needle bar frame 7 by bolts, rivets, or welding. In this way, the thread adjusting frame 1 can move synchronously with the needle bar frame 7, and no additional power mechanism is required to drive the thread adjusting frame 1 to move synchronously with the needle bar frame 7, which can further reduce production costs.

[0075] Specific embodiment 4: The rest of the structure of this embodiment refers to specific embodiment 1 or specific embodiment 2, the difference is that:

[0076] The embroidery machine comprises a frame and a plurality of machine heads. Each machine head comprises a needle bar frame 7.

[0077] The thread adjusting unit corresponds to the head of the embroidery machine one to one. Of course, it should be noted that in actual application, the thread adjusting unit of this embodiment can also be applied to a part of the heads of the embroidery machine.

[0078] The thread adjustment stand 1 is provided with an embroidery thread guide structure. The embroidery thread 6 of the embroidery machine is guided through the embroidery thread guide structure. The embroidery threads 6 passing through the embroidery thread guide structure on the thread adjustment stand 1 are distributed in sequence along the moving direction of the needle bar stand 7, and the embroidery threads 6 and the dynamic pressure thread plate 3.1 are located on the same side of the constant pressure thread surface 2. The constant pressure thread surface 2 is parallel to the moving direction of the needle bar stand 7. The embroidery thread guide structure includes a plurality of wire structures distributed in sequence along the moving direction of the needle bar stand 7 of the embroidery machine. The wire structure includes a plurality of wire holes distributed in sequence from top to bottom, at least one of which is located above the dynamic pressure thread plate 3.1 of the upper thread adjustment component 3, and at least one wire hole is located below the dynamic pressure thread plate 3.1 of the lower thread adjustment component 3. Each wire structure corresponds to an embroidery thread 6, and the embroidery thread 6 passes through the wire holes of the corresponding wire structure from top to bottom.

[0079] In this embodiment, the embroidery thread 6 on the thread adjustment frame 1 of the thread adjustment unit corresponds one-to-one with the embroidery needle on the needle bar frame 7 of the corresponding machine head. The conductive wire structure on the thread adjustment frame 1 corresponds one-to-one with the embroidery thread 6. The thread adjustment frame 1 is directly or indirectly fixed to the frame of the embroidery machine. The position of the thread adjustment frame 1 in the direction of movement of the needle bar frame 7 remains unchanged.

[0080] The thread adjusting device and the automatic drive device 4 move synchronously with the needle bar frame 7 of the embroidery machine so that the thread adjusting device corresponds to each embroidery thread 6 in sequence. The automatic drive device 4 drives the dynamic thread pressure piece 3.1 of the thread adjusting device to move toward the constant pressure surface 2 so that the corresponding embroidery thread 6 is pressed tightly between the dynamic thread pressure piece 3.1 and the constant pressure surface 2. In this embodiment, the thread adjusting device and the automatic drive device 4 of the same thread adjusting unit are both one.

[0081] At present, a row of embroidery needles are generally arranged on the needle bar frame 7 of the existing embroidery machine. The embroidery machine drives the needle bar frame 7 to move horizontally through the embroidery machine color changing system to realize the operation of different embroidery needles on the needle bar frame 7 (different embroidery needles correspond to embroidery threads 6 of different colors); in this embodiment, the thread adjusting device and the automatic driving device 4 are moved synchronously with the needle bar frame 7 of the embroidery machine, so that the thread adjusting device corresponds to each embroidery thread 6 in turn; then, the automatic driving device 4 drives the dynamic thread pressure piece 3.1 of the thread adjusting device to move toward the fixed pressure line surface 2, so that the corresponding embroidery thread 6 is pressed between the dynamic thread pressure piece 3.1 and the fixed pressure line surface 2. Based on this, each thread adjusting unit only needs one thread adjusting device and one automatic driving device 4 to automatically adjust the pressing force of each embroidery thread 6. There is no need for each embroidery thread 6 to correspond to a thread adjusting device and an automatic driving device 4, which can effectively reduce the number of thread adjusting devices and automatic driving devices 4, thereby reducing the production cost.

[0082] The specific operation of the automatic thread pressing device for an embroidery machine of this embodiment is as follows. The following description takes the working process of a certain embroidery needle of the embroidery machine head as an example.

[0083] When the needle bar frame 7 is translated to place the embroidery needle in the working position, the thread adjusting device and the automatic driving device 4 move synchronously with the needle bar frame 7 to move the thread adjusting device and the automatic driving device 4 to the embroidery line 6 corresponding to the embroidery needle;

[0084] Then, the automatic drive device 4 drives the dynamic pressure piece 3.1 of the thread adjusting device to move toward the constant pressure line surface 2, so that the corresponding embroidery thread 6 is pressed between the dynamic pressure piece 3.1 and the constant pressure line surface 2, thereby accurately controlling the tightness of the corresponding embroidery thread 6.

[0085] When the embroidery needle stops working, the automatic driving device 4 is reset, and the corresponding dynamic pressure piece 3.1 is separated from the constant pressure surface 2, returning to the initial state.

[0086] The specific method of synchronous movement of the thread adjusting device and the automatic driving device 4 and the needle bar frame 7 of the embroidery machine is as follows:

[0087] The embroidery machine frame is equipped with a translation track, on which a translation bracket is mounted. The translation track is parallel to the movement direction of the needle bar frame 7. The thread adjustment device and automatic drive device 4 are both mounted on the translation bracket. The translation bracket is driven by a translation actuator. The translation actuator is mounted on the embroidery machine frame. The translation actuator is an electric cylinder, electric push rod, or linear module. Of course, it should be noted that the translation actuator can also be other commercially available translation actuators.

[0088] Specific embodiment 5: The rest of the structure of this embodiment refers to specific embodiment 1 or specific embodiment 2, except that:

[0089] The embroidery machine comprises a frame and a plurality of machine heads. Each machine head comprises a needle bar frame 7.

[0090] The thread adjusting unit corresponds to the head of the embroidery machine one to one. Of course, it should be noted that in actual application, the thread adjusting unit of this embodiment can also be applied to a part of the heads of the embroidery machine.

[0091] The same thread adjusting unit comprises multiple thread adjusting devices. Each thread adjusting device is arranged side by side along the direction of movement of the needle bar frame 7 of the embroidery machine. An automatic drive device 4 corresponds to each thread adjusting device. The automatic drive device 4 drives the dynamic thread pressure piece 3.1 of the corresponding thread adjusting device toward the constant thread pressure surface 2, so that the corresponding dynamic thread pressure piece 3.1 presses against the constant thread pressure surface 2.

[0092] In this embodiment, the thread adjusting device of the same thread adjusting unit corresponds to the embroidery needle on the needle bar frame 7 of the corresponding machine head. The embroidery thread 6 on the embroidery needle passes between the dynamic thread pressure piece 3.1 and the fixed thread pressure surface 2 of the two thread adjusting components 3 of the corresponding thread adjusting device.

[0093] In this embodiment, the thread adjusting stand 1 can move synchronously with the needle bar stand 7 of the embroidery machine, and can also be fixedly arranged on the frame of the embroidery machine.

[0094] Specific embodiment 6: The rest of the structure of this embodiment refers to any one of the specific embodiments from specific embodiment 1 to specific embodiment 5, except that:

[0095] like Figure 1-Figure 3 As shown, an automatic thread pressing device for an embroidery machine also includes an electronic thread take-up spring 5 for tightening the embroidery thread 6. The electronic thread take-up spring 5 includes a thread take-up hook 5.1 and a thread take-up motor 5.2 that drives the thread take-up hook 5.1 to rotate. The thread take-up hook 5.1 is located between the two thread adjusting components 3 of the thread adjusting device. This embodiment uses an electronic thread take-up spring 5 to replace the mechanical thread take-up spring in a traditional embroidery machine. The thread take-up motor 5.2 can drive the thread take-up hook 5.1 to rotate to different angles to adjust the tightening force of the thread take-up hook 5.1 on the embroidery thread 6. Based on this, the electronic thread take-up spring 5 can adjust the tightening force of the electronic thread take-up spring 5 according to the needs of different embroidery threads 6 to adapt to the needs of different embroidery threads 6.

[0096] In one embodiment, the thread adjustment stand 1 moves synchronously with the needle bar frame 7 of the embroidery machine. For detailed structure, see Specific Example 3. In this embodiment, the electronic thread take-up spring 5 corresponds to the thread adjustment unit, and the electronic thread take-up spring 5 has a single thread take-up hook 5.1. The electronic thread take-up spring 5 is mounted on the embroidery machine frame. When the needle bar frame 7 translates, placing the embroidery needle in the working position, the thread take-up motor 5.2 drives the thread take-up hook 5.1 to rotate, tightening the corresponding embroidery thread 6.

[0097] When the embroidery needle stops working, the thread take-up motor 5.2 drives the thread take-up hook 5.1 to rotate, separating the thread take-up hook 5.1 from the embroidery thread 6 and the thread adjustment frame 1, without affecting the synchronous movement of the thread adjustment frame 1 and the needle bar frame 7 of the embroidery machine. In this way, only one electronic thread take-up spring 5 is needed to automatically adjust the pressing force of each embroidery thread 6 on the same needle bar frame 7. There is no need to correspond to a corresponding electronic thread take-up spring 5 for each embroidery thread 6, which can effectively reduce the number of electronic thread take-up springs 5, thereby reducing production costs.

[0098] In another embodiment, the electronic thread take-up spring 5 corresponds one-to-one with each thread adjustment unit, and the thread take-up lever of the same electronic thread take-up spring 5 corresponds one-to-one with each embroidery thread 6 on the corresponding needle bar frame 7. The electronic thread take-up spring 5 is mounted on the thread adjustment frame 1. Within the same thread adjustment unit, each thread take-up lever shares a common thread take-up motor 5.2. Specifically, a thread take-up shaft is rotatably mounted on the thread adjustment frame 1, and one end of each thread take-up lever is fixed to the shaft. The thread take-up motor 5.2 drives the shaft to rotate, thereby driving the synchronous rotation of each thread take-up lever within the same thread adjustment unit.

[0099] In the third embodiment, the thread take-up lever of the electronic thread take-up spring 5 corresponds to the thread take-up motor 5.2 in a one-to-one manner, and the thread take-up motor 5.2 drives the corresponding thread take-up lever to rotate. The electronic thread take-up spring 5 corresponds to the embroidery thread 6 in a one-to-one manner.

[0100] Specific embodiment 7, an embroidery machine, including an automatic thread pressing device for the embroidery machine. The specific structure of the automatic thread pressing device for the embroidery machine can be referred to any one of specific embodiments 1 to 6.

[0101] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any way. Any simple modification, change and equivalent transformation of the above embodiment based on the technical essence of the present invention shall still fall within the scope of protection of the technical solution of the present invention.

Claims

1. An automatic thread pressing device for an embroidery machine, characterized in that: include: The wire adjustment unit includes a constant pressure wire surface and a wire adjustment device. The wire adjustment device includes two wire adjustment components distributed in an upper and lower manner. The wire adjustment component includes a movable dynamic wire pressure piece and an elastic element that drives the dynamic wire pressure piece to separate from the constant pressure wire surface. The automatic driving device drives the dynamic thread pressure piece of the thread adjusting device to move toward the fixed pressure line surface, so that the embroidery thread of the embroidery machine is pressed tightly between the dynamic thread pressure piece and the fixed pressure line surface.

2. The automatic thread pressing device for an embroidery machine according to claim 1, characterized in that: The automatic driving device comprises: Two swing arms, one end of the two swing arms is fixed on the same rotating part, one swing arm corresponds to a line adjusting component in the line adjusting device, and the other swing arm corresponds to another line adjusting component in the line adjusting device; The wire pressing motor drives the rotating part to rotate. When the wire pressing motor drives the rotating part to rotate, one of the swing arms pushes the dynamic wire pressing piece of the corresponding wire adjusting component to move toward the fixed wire pressing surface; then the other swing arm rotates away from the fixed wire pressing surface of the corresponding wire adjusting component.

3. The automatic thread pressing device for an embroidery machine according to claim 1, characterized in that: The automatic driving device comprises: Two swing arms, each having a rotating portion fixed at one end thereof, wherein one swing arm corresponds to a line-adjusting assembly in the line-adjusting device, and the other swing arm corresponds to another line-adjusting assembly in the line-adjusting device; The two wire pressing motors correspond to the swing arms one by one. The wire pressing motors drive the corresponding swing arms to rotate through the rotating parts, thereby pushing the dynamic wire pressing pieces of the corresponding wire adjusting components to move toward the fixed wire pressing surface.

4. The automatic thread pressing device for an embroidery machine according to claim 2 or 3, characterized in that: The swing arm includes a swing arm spring, a limit piece, and a fixed arm and a rotating arm that are hingedly connected. One end of the fixed arm is fixedly connected to the rotating part. The limit piece is arranged on the fixed arm or the rotating arm. The rotating arm is pressed against the limit piece under the action of the swing arm spring. The swing arm pushes the dynamic pressure piece of the corresponding line adjusting assembly toward the fixed pressure line surface through the rotating arm.

5. The automatic thread pressing device for an embroidery machine according to claim 2 or 3, characterized in that: The end of the swing arm is provided with a roller.

6. The automatic thread pressing device for an embroidery machine according to claim 1, characterized in that: The automatic drive device includes two drive actuators, one of which corresponds to a line-adjusting component in the line-adjusting device, and the other corresponds to another line-adjusting component in the line-adjusting device; the drive actuators are electric cylinders or electric push rods or push-pull electromagnets or cylinders.

7. An automatic thread pressing device for an embroidery machine according to claim 1, 2, 3 or 6, characterized in that: The line adjusting assembly also includes a guide member provided with a guide hole and a guide rod slidably arranged in the guide hole, a dynamic pressure line piece is arranged on one end of the guide rod facing the fixed pressure line surface, an end plate is provided at the other end of the guide rod, and an elastic element is arranged between the guide hole and the end plate.

8. The automatic thread pressing device for an embroidery machine according to claim 1, 2, 3 or 6, characterized in that: The thread adjusting unit also includes a thread adjusting frame, a constant pressure line surface is arranged on the thread adjusting frame, an embroidery thread guide structure is provided on the thread adjusting frame, the embroidery thread of the embroidery machine is guided by the embroidery thread guide structure, and the embroidery threads passing through the embroidery thread guide structure on the thread adjusting frame are distributed in sequence along the moving direction of the needle bar frame, and the embroidery threads and the dynamic pressure line plate are located on the same side of the constant pressure line surface; The thread adjusting rack moves synchronously with the needle bar rack of the embroidery machine so that the thread adjusting device corresponds to each embroidery thread in turn, and the automatic driving device drives the dynamic thread pressure piece of the thread adjusting device to move toward the fixed pressure line surface so that the corresponding embroidery thread is pressed between the dynamic thread pressure piece and the fixed pressure line surface.

9. An automatic thread pressing device for an embroidery machine according to claim 1, 2, 3 or 6, characterized in that: The thread adjusting unit also includes a thread adjusting frame, a constant pressure line surface is arranged on the thread adjusting frame, an embroidery thread guide structure is provided on the thread adjusting frame, the embroidery thread of the embroidery machine is guided by the embroidery thread guide structure, and the embroidery threads passing through the embroidery thread guide structure on the thread adjusting frame are distributed in sequence along the moving direction of the needle bar frame, and the embroidery threads and the dynamic pressure line plate are located on the same side of the constant pressure line surface; The thread adjusting device and the automatic driving device move synchronously with the needle bar frame of the embroidery machine so that the thread adjusting device corresponds to each embroidery thread in turn, and the automatic driving device drives the dynamic thread pressure piece of the thread adjusting device to move toward the fixed pressure line surface so that the corresponding embroidery thread is pressed between the dynamic thread pressure piece and the fixed pressure line surface.

10. The automatic thread pressing device for an embroidery machine according to claim 1, 2, 3 or 6, characterized in that: The same thread adjusting unit has multiple thread adjusting devices, and each thread adjusting device is distributed side by side along the moving direction of the needle bar frame of the embroidery machine; the automatic driving device corresponds to the thread adjusting device one by one.

11. The automatic thread pressing device for an embroidery machine according to claim 1, 2, 3 or 6, characterized in that: It also includes an electronic thread take-up spring for tightening the embroidery thread, which includes a thread take-up hook and a thread take-up motor for driving the thread take-up hook to rotate, and the thread take-up hook is located between the two thread adjusting components of the thread adjusting device.

12. An embroidery machine, characterized in that: The invention comprises an automatic thread pressing device for an embroidery machine according to any one of claims 1 to 11.

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