An embroidery machine automatic color changing thread tension regulating device and embroidery machine

Abstract

The utility model discloses an embroidery machine automatic colour changing embroidery thread tension regulation and control equipment and embroidery machine, which aims at providing an embroidery machine automatic colour changing embroidery thread tension regulation and control equipment and embroidery machine, which can automatically adjust embroidery thread tension according to actual needs during the working process of the embroidery machine, effectively improves the adjustment accuracy and consistency of each embroidery thread tension, thereby improving embroidery quality and reducing labor cost. It includes: translation support, electronic thread lifting mechanism, which is equipped on the translation support, includes thread lifting cross bar and the thread lifting motor of driving thread lifting cross bar swing, is equipped with a plurality of side -by -side distribution's thread lifting hook on thread lifting cross bar, press line unit, which is equipped on the translation support, includes fixed pressure line surface and a plurality of side -by -side distribution's dynamic pressure line piece, fixedly arranged electromagnet, translation support and needle bar holder of embroidery machine synchronous movement, to make electromagnet correspond with each dynamic pressure line piece in pressure line unit in turn, when electromagnet is electrified, corresponding dynamic pressure line piece is adsorbed on fixed pressure line surface under the magnetic attraction of electromagnet.

Description

Technical Field

[0001] This utility model relates to the field of embroidery machine technology, specifically to an automatic color-changing embroidery thread tension control device and an embroidery machine. Background Technology

[0002] The embroidery thread in the embroidery machine needs to maintain the appropriate tension. The tension should not be too high or too low. If the tension of the embroidery thread is too high, the fabric will be pulled loose by the embroidery thread during the embroidery process, and holes may even appear under the pull of the embroidery thread, affecting the quality of the embroidery. If the tension of the embroidery thread is too low, the embroidery thread of the embroidery pattern will be loose, reducing the quality of the embroidery.

[0003] Current embroidery machines use thread pressers to adjust the tension of the embroidery thread. Each thread corresponds to one thread presser, which includes a pressing knob. The embroidery thread passes through the corresponding presser. The operator manually rotates the pressing knob to adjust the pressure on the embroidery thread, thereby adjusting the thread tension. For example, Chinese Patent Publication No. CN201092608Y, entitled "Thread Presser Device for Sewing Machine and Embroidery Machine," uses a manual thread presser to manually adjust the thread tension.

[0004] Current embroidery machines use manual thread tensioners to manually adjust the thread tension, which can solve the problem of thread tightness to some extent; however, it has the following shortcomings. The tension of the embroidery thread depends on manual adjustment by the operator. However, manual adjustment has problems such as low adjustment efficiency, poor consistency in the tension of the embroidery thread, and inability to guarantee the quality of the embroidery. At the same time, there is also the problem of high labor costs.

[0005] On the other hand, with the development of embroidery machines, the number of machine heads on these machines has been continuously increasing. Current multi-station embroidery machines often have dozens or even hundreds of machine heads, arranged in a row. Each machine head includes a needle bar frame with a row of needles. Manually adjusting the thread tension using a thread presser is not only labor-intensive but also difficult to adapt to the production rhythm. Therefore, this method of manually adjusting the thread tension using a thread presser is increasingly unable to meet the needs of modern multi-station embroidery machines. Utility Model Content

[0006] The purpose of this invention is to provide an automatic color-changing embroidery thread tension control device and embroidery machine that can automatically adjust the tension of the embroidery thread according to actual needs during the operation of the embroidery machine, effectively improving the accuracy and consistency of the adjustment of the tension of each embroidery thread, thereby improving the quality of the embroidery and reducing labor costs.

[0007] The technical solution of this utility model is: An automatic color-changing embroidery thread tension control device for embroidery machines includes: Translation support; An electronic thread-picking mechanism is mounted on a translational support and includes a thread-picking crossbar and a thread-picking motor that drives the thread-picking crossbar to swing. The thread-picking crossbar is equipped with several thread-picking hooks arranged side by side. The pressure line unit, located on the translation support, includes a fixed pressure line surface and several moving pressure line pieces arranged side by side; A fixed electromagnet; The translation bracket moves synchronously with the needle bar frame of the embroidery machine, so that the electromagnets sequentially correspond to each moving pressure plate in the pressure unit; when the electromagnets are energized, the corresponding moving pressure plates are attracted to the fixed pressure surface under the magnetic attraction of the electromagnets. The specific operation of an automatic color-changing embroidery thread tension control device for an embroidery machine according to this solution is as follows (the following description uses the working process of a certain embroidery needle at the head of the embroidery machine as an example). When the needle bar frame moves horizontally to place the embroidery needle in the working position, the horizontal support moves synchronously with the needle bar frame, causing the moving pressure plate corresponding to the embroidery needle to move to the electromagnet, aligning the moving pressure plate with the electromagnet, and the embroidery thread passes between the corresponding moving pressure plate and the fixed pressure surface. Next, the electromagnet is energized, causing the corresponding moving pressure plate to be attracted to the stationary pressure plate under the electromagnet's magnetic attraction, thus providing the set clamping force to the embroidery thread. Simultaneously, the magnetic force exerted by the electromagnet on the moving pressure plate can be adjusted by regulating the current, thereby adjusting the clamping force between the stationary and moving pressure plates to achieve automatic adjustment of the embroidery thread tension. Therefore, this automatic color-changing embroidery thread tension control device for embroidery machines can automatically adjust the embroidery thread tension according to actual needs during machine operation, effectively improving the accuracy and consistency of tension adjustment for each thread, thereby improving the quality of the embroidery. Furthermore, it eliminates the need for manual adjustment of thread tension, thus well adapting to the needs and production rhythm of current multi-station embroidery machines and reducing labor costs.

[0008] On the other hand, existing embroidery machines typically have a row of needles arranged on the needle bar frame. The embroidery machine uses a color-changing system to drive the needle bar frame to move horizontally, allowing different needles on the needle bar frame to work (different needles correspond to different colored embroidery threads). The automatic color-changing embroidery thread tension control device in this solution moves synchronously with the needle bar frame of the embroidery machine via a translation bracket, so that the electromagnets sequentially correspond to each moving pressure plate in the pressure plate unit. Based on this, only one electromagnet is needed for each pressure plate unit, eliminating the need for a separate electromagnet for each moving pressure plate. This effectively reduces the number of electromagnets, simplifying the structure and lowering manufacturing costs.

[0009] Furthermore, the electronic thread-picking mechanism in this solution can also pick up the thread by driving the thread-picking crossbar and each thread-picking hook to rotate at different angles via a thread-picking motor. Simultaneously, using the same thread-picking motor to drive all the thread-picking hooks on the crossbar to rotate synchronously can effectively reduce the number of thread-picking motors and simplify the control program, thereby reducing costs.

[0010] Preferably, one pressing unit corresponds to one electromagnet, the moving pressing plate in the same pressing unit corresponds one-to-one with the embroidery thread, the embroidery thread passes between the corresponding moving pressing plate and the fixed pressing surface, the thread take-up hook corresponds one-to-one with the embroidery thread, and the embroidery thread goes around the corresponding thread take-up hook.

[0011] Preferably, the translation bracket is fixed to the needle bar frame, so that the pressing unit and electronic thread take-up mechanism mounted on the translation bracket move synchronously with the needle bar frame; the electromagnet is fixedly mounted on the frame of the embroidery machine. In this way, the translation bracket can move synchronously with the needle bar frame, so that the electromagnet sequentially corresponds to each moving pressing piece in the pressing unit; and no additional power mechanism is needed to drive the translation bracket to move synchronously with the needle bar frame, which can further reduce manufacturing costs; at the same time, it also facilitates actual production.

[0012] Preferably, the thread take-up hook includes a thread take-up ring through which the embroidery thread passes. This ensures that the embroidery thread will not come off the thread take-up hook.

[0013] Preferably, the pressing unit further includes a fixed pressing plate fixedly mounted on a translational bracket. One side of the fixed pressing plate facing the moving pressing plate forms the fixed pressing surface. The moving pressing plate and the electromagnet are distributed on opposite sides of the fixed pressing plate, with the electromagnet close to or against the fixed pressing plate. This facilitates the arrangement of the moving pressing plate and the electromagnet, and is convenient for actual production.

[0014] Preferably, the crimping unit also includes a crimping frame, which is mounted on a sliding support, and each movable crimping piece of the crimping unit is movably mounted on the crimping frame. This facilitates the installation and fabrication of each movable crimping piece of the crimping unit.

[0015] Preferably, the crimping unit also includes several guide rods arranged side by side. The guide rods are slidably mounted on the crimping frame, and each guide rod corresponds to a movable crimping piece, with the movable crimping piece located at the end of the corresponding guide rod. This ensures that the movable crimping piece can move smoothly.

[0016] Preferably, the wire pressing bracket is magnetically attached to the translation bracket, or it is secured to the translation bracket with bolts or clips. This facilitates the installation and replacement of the wire pressing bracket and the moving wire pressing piece.

[0017] Preferably, the pressing unit also includes several elastic elements, each corresponding to a movable pressing piece. The movable pressing piece is pre-pressed onto the fixed pressing surface under the action of the corresponding elastic element. In practical applications, if the movable pressing piece is far from the fixed pressing surface (e.g., 3-5 mm) when the electromagnet is de-energized, it may fail to be magnetically attracted to the fixed pressing surface when the electromagnet is energized, causing the tension adjustment unit to malfunction. To solve this problem, this solution uses elastic elements to pre-press the movable pressing piece onto the fixed pressing surface. Thus, when the electromagnet is energized, the corresponding movable pressing piece is attracted to the fixed pressing surface by the electromagnet's magnetic attraction. This effectively solves the problem that when the electromagnet is de-energized, the movable pressing piece is far from the fixed pressing surface, preventing it from being magnetically attracted to the fixed pressing surface when the electromagnet is energized, thus causing the tension adjustment unit to malfunction.

[0018] Preferably, there are two pressing units, with one pressing unit located above the other, and the same embroidery thread passes through both pressing units sequentially. Each electromagnet corresponds to one pressing unit, and the thread take-up bar and hook are located between the two pressing units. In actual operation, different working modes can be selected as needed, such as the upper pressing unit or the lower pressing unit, to adjust the tension of the embroidery thread.

[0019] The beneficial effects of this utility model are: The magnetic force exerted by the electromagnet on the moving pressure plate can be adjusted by regulating the current, thereby regulating the clamping force between the fixed pressure plate and the moving pressure plate, thus achieving automatic adjustment of the embroidery thread tension. Therefore, it can automatically adjust the embroidery thread tension according to actual needs, effectively improving the accuracy and consistency of tension adjustment for each thread, thereby improving the quality of the embroidery. At the same time, it eliminates the need for manual adjustment of the embroidery thread tension, thus adapting well to the needs and production rhythm of current multi-station embroidery machines and reducing labor costs.

[0020] Each pressing unit only needs one electromagnet, eliminating the need for a separate electromagnet for each moving pressing piece. This effectively reduces the number of electromagnets, simplifying the structure and lowering manufacturing costs.

[0021] The electronic thread-lifting mechanism can also lift threads by driving the thread-lifting crossbar and each thread-lifting hook to rotate at different angles using a thread-lifting motor. Furthermore, using the same thread-lifting motor to drive all the thread-lifting hooks on the crossbar to rotate synchronously can effectively reduce the number of thread-lifting motors and simplify their control program, thereby reducing costs. Attached Figure Description

[0022] Figure 1 This is a frontal view of a structural schematic diagram of an automatic color-changing embroidery thread tension control device for an embroidery machine, according to this utility model.

[0023] Figure 2 This is a schematic diagram of the structure of an automatic color-changing embroidery thread tension control device for an embroidery machine, based on the present invention, from the perspective of the quilt cover.

[0024] Figure 3 This is a partial cross-sectional structural diagram of an automatic color-changing embroidery thread tension control device for an embroidery machine according to this utility model.

[0025] Figure 4 yes Figure 3 A magnified view of a portion of point A in the middle.

[0026] In the picture: Translation bracket 1; 2. Pressing unit, 2.1. Fixed pressing piece, 2.2. Moving pressing piece, 2.3. Pressing frame, 2.4. Elastic element, 2.5. Guide rod; Electromagnet 3; Needle bar holder 4; Rack 5; Embroidery thread 6; Electronic thread-picking mechanism 7, thread-picking motor 7.1, thread-picking crossbar 7.2, thread-picking hook 7.3; Mounting bracket 8. Detailed Implementation

[0027] Specific Implementation Example 1, such as Figure 1 , Figure 2 , Figure 3 As shown, an automatic color-changing embroidery thread tension control device for an embroidery machine includes a translation bracket 1, a thread pressing unit 2, an electromagnet 3, and an electronic thread take-up mechanism 7. The electromagnet 3 is fixedly installed.

[0028] The crimping unit 2 is mounted on the translation bracket 1. The crimping unit 2 includes a fixed crimping surface mounted on the translation bracket 1 and several movable crimping pieces 2.2 arranged side by side. In this embodiment, the movable crimping pieces 2.2 of the crimping unit 2 are distributed equidistantly along the moving direction of the needle bar frame 4.

[0029] The translation bracket 1 moves synchronously with the needle bar frame 4 of the embroidery machine, so that the electromagnet 3 corresponds sequentially to each of the moving pressure plates 2.2 in the pressure unit 2. When the electromagnet 3 is energized, the corresponding moving pressure plate 2.2 is attracted to the fixed pressure surface under the magnetic attraction of the electromagnet 3. The stronger the magnetic attraction of the electromagnet 3, the greater the clamping force between the moving pressure plate 2.2 and the fixed pressure surface. The embroidery thread 6 of the embroidery machine passes between the moving pressure plate 2.2 and the fixed pressure surface, and the embroidery thread is pressed between the moving pressure plate 2.2 and the fixed pressure surface.

[0030] An electronic thread take-up mechanism 7 is mounted on a translation support 1. The electronic thread take-up mechanism 7 includes a thread take-up crossbar 7.2 and a thread take-up motor 7.1. The thread take-up crossbar 7.2 has several thread take-up hooks 7.3 arranged side-by-side. In this embodiment, the thread take-up crossbar 7.2 is parallel to the moving direction of the needle bar frame 4. Each thread take-up hook 7.3 is distributed sequentially along the thread take-up crossbar 7.2. The thread take-up motor 7.1 is fixedly mounted on the translation support 1. The thread take-up motor 7.1 drives the thread take-up crossbar 7.2 to swing up and down. The embroidery thread 6 passes around the corresponding thread take-up hook 7.3.

[0031] The specific operation of the automatic color-changing embroidery thread tension control device for an embroidery machine in this embodiment is as follows (the working process of a certain embroidery needle at the head of the embroidery machine is described below as an example). When the needle bar frame 4 is translated to place the embroidery needle in the working position, the translation bracket 1 moves synchronously with the needle bar frame 4, so that the moving pressure plate 2.2 corresponding to the embroidery needle moves to the electromagnet 3, so that the moving pressure plate 2.2 is aligned with the electromagnet 3, and the embroidery thread passes between the corresponding moving pressure plate 2.2 and the fixed pressure surface. Next, the electromagnet 3 is energized, causing the corresponding moving pressure plate 2.2 to be attracted to the fixed pressure plate surface under the magnetic attraction of the electromagnet 3, thereby providing the set clamping force to the embroidery thread. Simultaneously, the magnetic attraction force exerted by the electromagnet 3 on the moving pressure plate 2.2 can be adjusted by regulating the current, thus adjusting the clamping force between the fixed pressure plate surface and the moving pressure plate 2.2, achieving automatic adjustment of the embroidery thread tension. Therefore, the automatic color-changing embroidery thread tension control device of this embodiment can automatically adjust the embroidery thread tension according to actual needs during the operation of the embroidery machine, effectively improving the accuracy and consistency of tension adjustment for each embroidery thread, thereby improving the quality of the embroidery. Furthermore, it eliminates the need for manual adjustment of the embroidery thread tension, thus well adapting to the usage requirements and production rhythm of current multi-station embroidery machines, and reducing labor costs.

[0032] On the other hand, currently existing embroidery machines typically have a row of embroidery needles arranged on the needle bar frame 4. The embroidery machine drives the needle bar frame 4 to move horizontally through the embroidery machine color-changing system, so that different embroidery needles on the needle bar frame 4 can work (different embroidery needles correspond to different colored embroidery threads). In this embodiment, the automatic color-changing embroidery thread tension control device moves synchronously with the needle bar frame 4 of the embroidery machine through the translation bracket 1, so that the electromagnet 3 corresponds to each moving pressing piece 2.2 in the pressing unit 2 in sequence. Based on this, each pressing unit 2 only needs one electromagnet 3, and it is not necessary for each moving pressing piece 2.2 to correspond to an electromagnet 3, which can effectively reduce the number of electromagnets 3, thereby simplifying the structure and reducing the manufacturing cost.

[0033] Furthermore, the electronic thread-picking mechanism in this solution can also pick up the thread by driving the thread-picking crossbar and each thread-picking hook to rotate at different angles via a thread-picking motor. Simultaneously, using the same thread-picking motor to drive all the thread-picking hooks on the crossbar to rotate synchronously can effectively reduce the number of thread-picking motors and simplify the control program, thereby reducing costs.

[0034] Specific embodiment two, such as Figures 1-4 As shown, an automatic color-changing embroidery thread tension control device for an embroidery machine includes a translation bracket 1, a thread pressing unit 2, an electromagnet 3, and an electronic thread take-up mechanism 7. The electromagnet 3 is fixedly installed.

[0035] The pressure unit 2 is mounted on the translation bracket 1. There may be one or two pressure units 2. In this embodiment, there are two pressure units 2, with one pressure unit 2 located above the other (i.e., the two pressure units 2 are distributed vertically). Each pressure unit 2 corresponds to one electromagnet 3. There is a one-to-one correspondence between the electromagnet 3 and the pressure unit 2.

[0036] In this embodiment, two electromagnets 3 corresponding to the pressing unit 2 are fixedly installed on the frame 5 of the embroidery machine. The two electromagnets 3 corresponding to the pressing unit 2 are also arranged vertically. The electromagnets 3 are fixedly installed on the frame 5 by mounting brackets 8, which are secured to the mounting brackets 8 by bolts, clips, clamps, welding, or other methods. The mounting brackets 8 are installed on the frame 5 by bolts, welding, riveting, or other methods.

[0037] The crimping unit 2 includes a fixed crimping surface mounted on the translation bracket 1 and several moving crimping pieces 2.2 arranged side by side. In this embodiment, the moving crimping pieces 2.2 of the crimping unit 2 are distributed equidistantly along the moving direction of the needle bar frame 4. The fixed crimping surface is parallel to the moving direction of the needle bar frame 4.

[0038] The translation bracket 1 moves synchronously with the needle bar frame 4 of the embroidery machine, so that the electromagnet 3 corresponds sequentially to each of the moving pressure plates 2.2 in the pressure unit 2. When the electromagnet 3 is energized, the corresponding moving pressure plate 2.2 is attracted to the fixed pressure surface under the magnetic attraction of the electromagnet 3. The stronger the magnetic attraction of the electromagnet 3, the greater the clamping force between the moving pressure plate 2.2 and the fixed pressure surface.

[0039] An electronic thread take-up mechanism 7 is mounted on a translation support 1. The electronic thread take-up mechanism 7 includes a thread take-up crossbar 7.2 and a thread take-up motor 7.1. The thread take-up crossbar 7.2 has several thread take-up hooks 7.3 arranged side-by-side. In this embodiment, the thread take-up crossbar 7.2 is parallel to the moving direction of the needle bar frame 4. Each thread take-up hook 7.3 is distributed sequentially along the thread take-up crossbar 7.2. The thread take-up crossbar 7.2 and the thread take-up hooks 7.3 are located between two pressing units 2. The thread take-up motor 7.1 is fixedly mounted on the translation support 1. The thread take-up motor 7.1 drives the thread take-up crossbar 7.2 to swing up and down. The embroidery thread 6 passes around the corresponding thread take-up hook 7.3.

[0040] An automatic color-changing embroidery thread tension control device is applied to the head of the embroidery machine, with each device corresponding to one head. In this embodiment, the automatic color-changing embroidery thread tension control device corresponds one-to-one with the head of the embroidery machine. It should be noted that in practical applications, the automatic color-changing embroidery thread tension control device of this embodiment can also be applied to only a portion of the head of the embroidery machine.

[0041] In this embodiment, the movable pressing plate 2.2 in the same pressing unit 2 corresponds one-to-one with the embroidery thread 6, that is, the movable pressing plate 2.2 in the same pressing unit 2 corresponds one-to-one with the embroidery thread 6 in the corresponding machine head. The embroidery thread 6 passes between the corresponding movable pressing plate 2.2 and the fixed pressing surface. The same embroidery thread 6 passes through two pressing units 2 in sequence. Specifically, the same embroidery thread 6 passes between the corresponding movable pressing plate 2.2 and the fixed pressing surface in the upper and lower pressing units 2 in sequence. The thread take-up hook 7.3 corresponds one-to-one with the embroidery thread. The embroidery thread 6 goes around the corresponding thread take-up hook 7.3.

[0042] The specific operation of the automatic color-changing embroidery thread tension control device for an embroidery machine in this embodiment is as follows (the working process of a certain embroidery needle at the head of the embroidery machine is described below as an example). When the needle bar frame 4 is translated to place the embroidery needle in the working position, the translation bracket 1 moves synchronously with the needle bar frame 4, so that the moving pressure plate 2.2 corresponding to the embroidery needle moves to the electromagnet 3, so that the moving pressure plate 2.2 is aligned with the electromagnet 3, and the embroidery thread passes between the corresponding moving pressure plate 2.2 and the fixed pressure surface. Next, the electromagnet 3 is energized, causing the corresponding moving pressure plate 2.2 to be attracted to the fixed pressure plate surface under the magnetic attraction of the electromagnet 3, thereby providing the set clamping force to the embroidery thread. Simultaneously, the magnetic attraction force exerted by the electromagnet 3 on the moving pressure plate 2.2 can be adjusted by regulating the current, thus adjusting the clamping force between the fixed pressure plate surface and the moving pressure plate 2.2, achieving automatic adjustment of the embroidery thread tension. Therefore, the automatic color-changing embroidery thread tension control device of this embodiment can automatically adjust the embroidery thread tension according to actual needs during the operation of the embroidery machine, effectively improving the accuracy and consistency of tension adjustment for each embroidery thread, thereby improving the quality of the embroidery. Furthermore, it eliminates the need for manual adjustment of the embroidery thread tension, thus well adapting to the usage requirements and production rhythm of current multi-station embroidery machines, and reducing labor costs.

[0043] In practical work, different working modes can be selected as needed. For example, the electromagnet 3 corresponding to the upper pressing unit 2 is energized (the electromagnet 3 corresponding to the lower pressing unit 2 is de-energized) to adjust the tightness of the embroidery thread; or the electromagnet 3 corresponding to the lower pressing unit 2 is energized (the electromagnet 3 corresponding to the upper pressing unit 2 is de-energized) to adjust the tightness of the embroidery thread.

[0044] On the other hand, currently existing embroidery machines typically have a row of embroidery needles arranged on the needle bar frame 4. The embroidery machine drives the needle bar frame 4 to move horizontally through the embroidery machine color-changing system, so that different embroidery needles on the needle bar frame 4 can work (different embroidery needles correspond to different colored embroidery threads). In this embodiment, the automatic color-changing embroidery thread tension control device moves synchronously with the needle bar frame 4 of the embroidery machine through the translation bracket 1, so that the electromagnet 3 corresponds to each moving pressing piece 2.2 in the pressing unit 2 in sequence. Based on this, each pressing unit 2 only needs one electromagnet 3, and it is not necessary for each moving pressing piece 2.2 to correspond to an electromagnet 3, which can effectively reduce the number of electromagnets 3, thereby simplifying the structure and reducing the manufacturing cost.

[0045] Furthermore, the electronic thread-picking mechanism in this solution can also pick up the thread by driving the thread-picking crossbar and each thread-picking hook to rotate at different angles via a thread-picking motor. Simultaneously, using the same thread-picking motor to drive all the thread-picking hooks on the crossbar to rotate synchronously can effectively reduce the number of thread-picking motors and simplify the control program, thereby reducing costs.

[0046] In this embodiment, the synchronous movement of the translation bracket 1 and the needle bar frame 4 of the embroidery machine can be achieved in the following way. In one implementation, such as Figure 1 , Figure 2 As shown, the translation bracket 1 is fixed to the needle bar frame 4 so that the thread pressing unit and electronic thread take-up mechanism provided on the translation bracket can move synchronously with the needle bar frame. For example, the translation bracket 1 is fixed to the needle bar frame 4 by bolts, riveting, or welding. In this way, the translation bracket 1 can move synchronously with the needle bar frame 4 so that the electromagnet 3 corresponds sequentially with each moving thread pressing piece 2.2 in the thread pressing unit 2; and there is no need to arrange an additional power mechanism to drive the translation bracket 1 to move synchronously with the needle bar frame 4, which can further reduce manufacturing costs; at the same time, it is also convenient for actual production.

[0047] In another embodiment, the translation bracket 1 is slidably mounted on the frame 5, and the sliding direction of the translation bracket 1 is parallel to the moving direction of the needle bar frame 4. The translation bracket 1 is driven to move synchronously with the needle bar frame 4 by an existing translation drive mechanism (such as a linear module, etc.) (not shown in the figure).

[0048] Furthermore, such as Figure 3 , Figure 4As shown, the pressing unit 2 also includes a fixed pressing plate 2.1 fixedly mounted on the translation bracket 1. The thickness of the fixed pressing plate 2.1 is 0.1-2 mm, for example, 0.2 mm, 0.3 mm, or 0.5 mm. The fixed pressing plate 2.1 is parallel to the moving direction of the needle bar holder 4. The side of the fixed pressing plate 2.1 facing the moving pressing plate 2.2 constitutes the fixed pressing surface. The moving pressing plate 2.2 and the electromagnet 3 are distributed on opposite sides of the fixed pressing plate 2.1, with the electromagnet 3 close to or against the fixed pressing plate 2.1. This facilitates the arrangement of the moving pressing plate 2.2 and the electromagnet 3, and facilitates actual production.

[0049] Furthermore, such as Figure 3 , Figure 4 As shown, the pressure unit 2 also includes several elastic elements 2.4. The elastic elements 2.4 are springs or elastic sheets. In this embodiment, the elastic element 2.4 is a spring. Each elastic element 2.4 corresponds to a movable pressure sheet 2.2, and the movable pressure sheet 2.2 is pre-pressed onto the fixed pressure surface under the action of the corresponding elastic element 2.4. In practical applications, when the electromagnet 3 is de-energized, if the movable pressure sheet 2.2 is far from the fixed pressure surface (e.g., 3-5 mm), it may prevent the movable pressure sheet 2.2 from being magnetically attracted to the fixed pressure surface when the electromagnet 3 is energized, causing the tension adjustment unit to fail. To address this issue, this embodiment uses an elastic element 2.4 to pre-press the dynamic pressure piece 2.2 onto the constant pressure surface. Thus, when the electromagnet 3 is energized, the corresponding dynamic pressure piece 2.2 is attracted to the constant pressure surface by the magnetic attraction of the electromagnet 3. This effectively solves the problem that when the electromagnet 3 is de-energized, the dynamic pressure piece 2.2 is too far from the constant pressure surface, preventing it from being attracted by the magnetic force when the electromagnet 3 is energized, thus causing the tension adjustment unit to malfunction.

[0050] Furthermore, such as Figure 3 , Figure 4 As shown, the crimping unit 2 also includes a crimping frame 2.3. The crimping frame 2.3 is mounted on the translation bracket 1. Each movable crimping piece 2.2 of the crimping unit 2 is movably mounted on the crimping frame 2.3. This facilitates the installation and fabrication of each movable crimping piece 2.2 of the crimping unit 2.

[0051] In one implementation, such as Figure 3 , Figure 4As shown, the crimping unit 2 also includes several guide rods 2.5 arranged side by side. The guide rods 2.5 are slidably mounted on the crimping frame 2.3. The sliding direction of the guide rods 2.5 is perpendicular to the fixed crimping surface. Each guide rod 2.5 corresponds to a movable crimping piece 2.2, which is located at the end of the corresponding guide rod 2.5. The movable crimping piece 2.2 and the fixed crimping surface are located on the same side of the crimping frame 2.3. A limiting member is provided on the guide rod 2.5, and the limiting member and the movable crimping piece 2.2 are located on opposite sides of the crimping frame 2.3. In this embodiment, the limiting member is composed of a retaining ring, which is engaged in the annular groove of the guide rod 2.5. Alternatively, the limiting member can be a limiting block. In this embodiment, the elastic element 2.4 is located between the crimping frame 2.3 and the movable crimping piece 2.2. For example, the elastic element 2.4 is a spring, which is sleeved on the guide rod 2.5 and located between the crimping frame 2.3 and the movable crimping piece 2.2. The dynamic pressure line piece 2.2 is pre-pressed onto the constant pressure line surface under the action of the corresponding elastic element 2.4.

[0052] In another embodiment, the elastic element 2.4 is a spring, one end of which is connected to the pressure frame 2.3, and the other end of which is connected to the movable pressure piece 2.2 (not shown in the figure). The movable pressure piece 2.2 and the fixed pressure surface are located on the same side of the pressure frame 2.3. The movable pressure piece 2.2 is pre-pressed onto the fixed pressure surface under the action of the corresponding elastic element 2.4.

[0053] Furthermore, the wire clamp 2.3 is fixed to the translation bracket 1 in the following manner: In one embodiment, the wire pressing frame 2.3 is magnetically attached to the translation bracket 1, and the wire pressing frame 2.3 and the translation bracket 1 are positioned by a positioning structure. This facilitates the installation and replacement of the wire pressing frame 2.3 and the movable wire pressing piece 2.2.

[0054] In one example, the positioning structure includes a positioning groove disposed on the translation bracket 1, and the wire pressing frame 2.3 is positioned within the positioning groove. The positioning groove contains the magnetic suction element, and the wire pressing frame 2.3 also contains a magnetic suction element.

[0055] In another example, the positioning structure includes a positioning hole and a positioning pin, one of which is disposed on the translation bracket 1 and the other on the wire pressing bracket 2.3. The wire pressing bracket 2.3 is provided with a magnetic attraction element, and the translation bracket 1 is also provided with a magnetic attraction element.

[0056] In another embodiment, the wire pressing bracket 2.3 is fixed to the translation bracket 1 by bolts or clips. This facilitates the installation and replacement of the wire pressing bracket 2.3 and the movable wire pressing piece 2.2.

[0057] In this embodiment, the wire crimping bracket 2.3 is also provided with a grip to facilitate the installation and replacement of the wire crimping bracket 2.3.

[0058] Furthermore, such as Figure 3As shown, the thread take-up hook 7.3 includes a thread take-up loop. The embroidery thread passes through the thread take-up loop corresponding to the thread take-up hook. This ensures that the embroidery thread will not come off the thread take-up hook. It should be noted that the thread take-up loop can also be made of a hook with its opening facing downwards, through which the embroidery thread passes.

[0059] In a third specific embodiment, an embroidery machine includes an automatic color-changing embroidery thread tension control device. The specific structure of this device is described in either the first or second specific embodiment.

[0060] The above description is merely a preferred embodiment of the present utility model and does not constitute any limitation on the present utility model. Any simple modifications, alterations, or equivalent transformations made to the above embodiments based on the technical essence of the present utility model shall still fall within the protection scope of the present utility model.

Claims

1. An automatic color-changing embroidery thread tension control device for embroidery machines, characterized in that, include: Translation support; An electronic thread-picking mechanism is mounted on a translational support and includes a thread-picking crossbar and a thread-picking motor that drives the thread-picking crossbar to swing. The thread-picking crossbar is equipped with several thread-picking hooks arranged side by side. The pressure line unit, located on the translation support, includes a fixed pressure line surface and several moving pressure line pieces arranged side by side; A fixed electromagnet; The translation bracket moves synchronously with the needle bar frame of the embroidery machine so that the electromagnet corresponds to each moving pressing piece in the pressing unit in sequence; when the electromagnet is energized, the corresponding moving pressing piece is attracted to the fixed pressing surface under the magnetic attraction of the electromagnet.

2. The automatic color-changing embroidery thread tension control device for an embroidery machine according to claim 1, characterized in that, One pressing unit corresponds to one electromagnet. The moving pressing plate in the same pressing unit corresponds to the embroidery thread. The embroidery thread passes between the corresponding moving pressing plate and the fixed pressing surface. The thread take-up hook corresponds to the embroidery thread. The embroidery thread goes around the corresponding thread take-up hook.

3. The automatic color-changing embroidery thread tension control device for an embroidery machine according to claim 1, characterized in that, The translation bracket is fixed on the needle bar frame so that the pressing unit and electronic thread take-up mechanism on the translation bracket move synchronously with the needle bar frame; the electromagnet is fixedly installed on the frame of the embroidery machine.

4. An automatic color-changing embroidery thread tension control device for an embroidery machine according to claim 1, 2, or 3, characterized in that, The thread-taking hook includes a thread-taking ring through which the embroidery thread passes.

5. An automatic color-changing embroidery thread tension control device for an embroidery machine according to claim 1, 2, or 3, characterized in that, The pressure unit also includes a fixed pressure plate fixedly mounted on a translation bracket. The side of the fixed pressure plate facing the moving pressure plate forms the fixed pressure surface. The moving pressure plate and the electromagnet are distributed on opposite sides of the fixed pressure plate, and the electromagnet is close to or against the fixed pressure plate.

6. An automatic color-changing embroidery thread tension control device for an embroidery machine according to claim 1, 2, or 3, characterized in that, The wire pressing unit also includes a wire pressing frame, which is mounted on a translational support, and each movable wire pressing piece of the wire pressing unit is movably mounted on the wire pressing frame.

7. The automatic color-changing embroidery thread tension control device for an embroidery machine according to claim 6, characterized in that, The pressing unit also includes several guide rods arranged side by side. The guide rods are slidably mounted on the pressing frame. Each guide rod corresponds to a movable pressing piece, and the movable pressing piece is located at the end of the corresponding guide rod.

8. The automatic color-changing embroidery thread tension control device for an embroidery machine according to claim 6, characterized in that, The wire pressing frame is fixed to the translation bracket by magnetic attraction, or the wire pressing frame is fixed to the translation bracket by bolts or clips.

9. An automatic color-changing embroidery thread tension control device for an embroidery machine according to claim 1, 2, or 3, characterized in that, The pressure line unit also includes several elastic elements, each corresponding to a movable pressure line piece. The movable pressure line piece is pre-pressed onto the fixed pressure line surface under the action of the corresponding elastic element.

10. An automatic color-changing embroidery thread tension control device for an embroidery machine according to claim 1, 2, or 3, characterized in that, There are two pressing units, one of which is located above the other, and the same embroidery thread passes through the two pressing units in sequence; the electromagnet corresponds to each pressing unit; the thread take-up bar and thread take-up hook are located between the two pressing units.

11. An embroidery machine, characterized in that, The invention includes an automatic color-changing embroidery thread tension control device for an embroidery machine as described in any one of claims 1-10.

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