An embroidery thread guide and embroidery needle protection device for an independent presser foot embroidery machine head

Abstract

The present invention discloses an embroidery thread guide and embroidery needle protection device for an independent presser foot embroidery machine head, comprising a guide protection plate and at least one connecting mechanism, wherein the connecting mechanism is fixedly connected to the guide protection plate, and the connecting mechanism is directly or indirectly connected to a needle bar frame. During embroidery, the guide protection plate is located above the highest point of the stroke of the presser foot cloth pressing end, and below the lowest point of the stroke of the needle bar bottom end, and the guide protection plate is provided with a needle hole directly below each embroidery needle. The beneficial effect of the present invention is that it solves the technical problem of oblique tensioning of the embroidery thread on the embroidery needle when the embroidery thread is stopped, so that the force applied to the embroidery needle in the working state or the stopped state is in the vertical direction, which plays a protective role in preventing the embroidery needle from being deformed and the embroidery thread from being pulled and broken.

Description

Technical Field

[0001] The invention relates to an embroidery thread guiding and embroidery needle protecting device for an independent presser foot embroidery machine head, and is mainly used in the technical field of embroidery machines. Background Art

[0002] In the prior art of embroidery machines, the presser foot of some embroidery machines is linked to the needle bar, and the presser foot is mounted on the needle bar through a presser foot spring, that is, the operation of the needle bar drives the presser foot to operate. This non-independent presser foot has the following problems: the main shaft load of the embroidery machine is relatively large, thereby affecting the accuracy of the main shaft transmission; the presser foot has a large range of motion, thereby causing greater vibration and noise in the machine.

[0003] The presser foot of some embroidery machines is an independent presser foot, that is, the spatial position and drive of the presser foot and the needle bar are independent of each other, which can solve the above defects: the needle bar needs to cooperate with the rotary shuttle to perform embroidery, which requires higher precision, while the presser foot only needs to press the fabric when the needle penetrates and leaves the fabric, so its precision requirement is relatively low. Therefore, after the spindle is freed from the drive of the presser foot, the accuracy of the needle bar when running at high speed can be improved; since the function of the presser foot is to press the fabric, theoretically the smaller the stroke, the better, because the smaller the stroke, the smaller the inertia generated by the presser foot, thereby increasing the running speed of the needle bar and realizing ultra-high-speed needle bar embroidery. This technical goal can be achieved by the independent drive of the presser foot. Through the design of an independent presser foot, the stroke of the presser foot can be set to less than 10mm.

[0004] refer to Figure 1 In the prior art, the structure of the presser foot A is currently mostly provided with a single hole a for the embroidery thread to pass through. The presser foot A of this structure is suitable for single-color embroidery thread (embroidery with only one embroidery thread), but it is defective in processing multi-color embroidery thread (embroidery with multiple embroidery threads): Figure 1 As described above, when three different colors of embroidery threads, namely, embroidery thread B-1, embroidery thread B-2, and embroidery thread B-3, are used for embroidery, since these three embroidery threads all pass through the single hole a of the presser foot A, the different embroidery threads will be entangled with each other. This phenomenon will cause the embroidery threads of multiple colors to be entangled with each other and embroidered on the fabric together, and the effect of embroidering multiple colors separately and alternately cannot be achieved. When changing colors (changing embroidery threads), if Figure 1 In the figure, embroidery thread B-1 and embroidery needle C-1 are in working state, embroidery thread B-2, embroidery needle C-2, embroidery thread B-3, and embroidery needle C-3 are in stopping state. At this time, embroidery thread B-1 is in vertical tension state, and embroidery thread B-2 and embroidery thread B-3 are in oblique tension state. In this state, embroidery thread B-2 and embroidery thread B-3 will produce oblique tension force on embroidery needle C-2 and embroidery needle C-3, which may easily cause the embroidery needle to bend and deform, and the embroidery thread may also be easily broken or fluffed. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide an embroidery thread guiding and embroidery needle protecting device for the head of an independent presser foot embroidery machine, which solves the technical problem that the stopped embroidery thread produces oblique tension on the embroidery needle, so that the embroidery needle is subjected to a vertical force regardless of whether it is in a working state or a stopped state, thereby playing a protective role in preventing the embroidery needle from being deformed and the embroidery thread from being pulled or broken.

[0006] The present invention is achieved through the following technical solutions.

[0007] An embroidery thread guiding and needle protecting device for an independent presser foot embroidery machine head comprises a guiding and protecting plate and at least one connecting mechanism, wherein the connecting mechanism is fixedly connected to the guiding and protecting plate, and the connecting mechanism is directly or indirectly connected to a needle bar frame. During embroidery, the guiding and protecting plate is located above the highest point of the movement of the presser foot cloth pressing end and below the lowest point of the movement of the needle bar bottom end. The guiding and protecting plate is provided with a needle hole directly below each embroidery needle.

[0008] By setting the guide protection plate and the needle hole, firstly, it has a limiting effect on the stopped embroidery thread. The part of the stopped embroidery thread between the embroidery needle and the guide protection plate is in a vertical state, and the part between the guide protection plate and the fabric is in an oblique state, that is, the direction of the tensioning force of the stopped embroidery thread acting on the stopped embroidery needle is vertically downward; secondly, the position setting of the guide protection plate will not interfere with the needle bar and the presser foot, and will not interfere with embroidery.

[0009] Furthermore, the connecting mechanism has a lifting structure, which can drive the guiding protective plate to lift upward when the guiding protective plate is subjected to an upward force.

[0010] After completing the embroidery, the presser foot needs to be lifted, and then pressed down after changing the cloth. The lifting structure can lift the guide protection plate when the presser foot is lifted, which will not affect the cloth change.

[0011] Furthermore, the connecting mechanism includes a first connecting member and a second connecting member, the first connecting member is slidably connected or slidably connected to the second connecting member, and the sliding direction is a vertical direction, the first connecting member is connected to the needle bar frame, and the second connecting member is connected to the guide protection plate.

[0012] The first connecting member and the second connecting member are slidably connected to achieve the function of the guide protection plate being able to be raised and lowered in a telescopic manner of the connecting mechanism.

[0013] Furthermore, the connecting mechanism also includes a connecting component, which is configured as a connecting seat, the connecting seat is fixed to the needle bar frame, and the first connecting member is fixed to the connecting seat.

[0014] The connecting seat is fixed to the needle bar frame, that is, the connecting mechanism is directly connected to the needle bar frame.

[0015] Furthermore, the connecting mechanism also includes a connecting component, which is configured as a connecting seat, the connecting seat is fixed to the lower thread pass, the lower thread pass is fixed to the needle bar rack, the lower thread pass has a plurality of through holes for allowing embroidery thread to pass through, and the first connecting member is fixed to the connecting seat.

[0016] The connecting seat is connected to the lower thread passing device, so that the connecting mechanism is indirectly connected to the needle bar frame, and the through hole provided in the lower thread passing device allows the embroidery thread to pass through, thereby preventing the embroidery thread from floating and improving the stability of the embroidery thread.

[0017] Furthermore, the connecting mechanism is equipped with a return spring for returning the guide protection plate to its original position after being lifted.

[0018] The restoring spring is provided as a reset component of the connecting mechanism after lifting, which, on the one hand, enables the connecting mechanism and the guide protection plate to be quickly reset, and on the other hand, the structure is simple and can save the installation space of the embroidery machine.

[0019] Furthermore, the needle bar frame is equipped with a lifting cylinder, and the piston rod of the lifting cylinder is connected to the guide protection plate.

[0020] The lifting cylinder is provided as a power component for lifting and pressing down the connecting mechanism, which can facilitate the operation of the presser foot and the efficiency of cloth changing.

[0021] Furthermore, the connecting mechanism includes a connecting member and a sleeve, the top and bottom ends of the connecting member are respectively connected to the sleeve and the guide protection plate, and the sleeve is slidably mounted on the needle rod.

[0022] The sliding sleeve of the kit is arranged on the needle bar, that is, the connecting mechanism is indirectly connected to the needle bar frame.

[0023] Furthermore, the needle bar sleeve is provided with a restoring spring, the top end of the restoring spring is connected to the lower dead point of the needle bar, and the bottom end of the restoring spring is connected to the sleeve, so as to reset the guide guard plate after lifting.

[0024] Furthermore, the needle bar frame is installed with a lifting cylinder, and the piston rod of the lifting cylinder is connected to the guide protection plate or the connecting mechanism.

[0025] Furthermore, the cloth pressing end of the presser foot is an open structure.

[0026] Compared with a single hole, an open structure can prevent multiple embroidery threads from being entangled with each other. On the one hand, it can prevent the embroidery threads from being broken or fluffed, and on the other hand, it improves the quality of the embroidery.

[0027] Beneficial effects of the present invention:

[0028] The installation plate and the needle hole are provided, so that the tensioning force of the stopped embroidery thread on the embroidery needle is in the vertical direction rather than the oblique direction, which not only avoids the bending and deformation of the embroidery needle, but also avoids the breaking of the embroidery thread. The positioning of the guide protection plate will not interfere with the needle bar and the presser foot. The lifting function and the reset function of the connecting mechanism are convenient for lifting the presser foot and replacing the cloth. The whole device structure is cleverly designed and has a better use effect. It not only protects the embroidery needle and cloth, but also improves the quality of the embroidery product. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a structural schematic diagram of an embroidery needle, a presser foot, and an embroidery thread in the prior art;

[0030] Figure 2 It is a structural diagram of implementation case 1;

[0031] Figure 3 This is a schematic diagram of the structure of the embroidery needle, presser foot, and embroidery thread of implementation case 1;

[0032] Figure 4 It is a structural diagram of implementation case 2;

[0033] Figure 5 It is a structural diagram of implementation case 3;

[0034] Figure 6 It is a structural diagram of implementation case 4;

[0035] Figure 7 It is a structural diagram of implementation case 5;

[0036] Figure 8 It is a structural diagram of implementation case 6;

[0037] Fig. 9 This is a structural diagram of implementation case 7. DETAILED DESCRIPTION

[0038] The present invention is further described in detail below based on the accompanying drawings and embodiments.

[0039] Implementation Case 1:

[0040] Reference Figure 2-Figure 3, an embroidery thread guiding and embroidery needle protecting device for an independent presser foot embroidery machine head, comprising a guiding and protecting plate 1, two connecting mechanisms, and a lifting cylinder 31. The guiding and protecting plate 1 is horizontally arranged, and the direction of the guiding and protecting plate 1 is arranged along the arrangement direction of the needle bars 102. The guiding and protecting plate 1 has a plurality of needle holes 1-A, and the number of the needle holes 1-A matches the number of the needle bars 102, and the position of the needle holes 1-A is located directly below the embroidery needle 101 of the needle bar 102. During embroidery, the horizontal height of the guide protection plate 1 is above the highest point of the movement of the cloth pressing end 104-A of the presser foot 104, and below the lowest point of the movement of the bottom end of the needle bar 102, that is, during the embroidery process, the bottom surface of the guide protection plate 1 will not contact the cloth pressing end 104-A of the presser foot 104, and the top surface will not contact the bottom end of the needle bar 102, and the embroidery needle 101 passes through the guide protection plate 1 through the needle hole 1-A, and passes downward through the cloth pressing end 104-A of the presser foot 104, the cloth and the needle hole 105 in turn, and the cloth pressing end 104-A of the presser foot 104 is an open structure.

[0041] The two connecting mechanisms are arranged at the left and right ends of the guide and protection plate 1, and include a first connecting member 21 and a second connecting member 22. The first connecting member 21 and the second connecting member 22 are both arranged vertically. The first connecting member 21 is slidably mounted on the second connecting member 22. Connecting seats 23 are fixedly arranged at the left and right ends of the bottom of the needle bar frame 103, respectively. The top ends of the two first connecting members 21 are fixedly connected to the two connecting seats 23, respectively, that is, the connection between the mechanism and the needle bar frame 103 is a direct connection, and the bottom ends of the two second connecting members 22 are fixedly connected to the left and right ends of the guide and protection plate 1, respectively. The second connecting member 22 can slide upward along the first connecting member 21, that is, it constitutes the lifting structure of the connecting mechanism. The lifting cylinder 31 is installed on the needle bar frame 103, and the piston rod 32 of the lifting cylinder 31 is arranged vertically, with the top end assembled on the output end of the lifting cylinder 31 and the bottom end connected to the guide and protection plate 1. As for the structural relationship between the first connecting member 21 and the second connecting member 22, it can also be set that the second connecting member 22 is slidably mounted on the first connecting member 21, and the effect is similar to the method provided in this embodiment. Compared with this structural setting, in this embodiment, the diameter of the first connecting member 21 is larger than that of the second connecting member 22, and the first connecting member 21 with a large diameter is directly connected to the connecting seat 23. The overall structure after the fixed connection is more stable. In this embodiment, the first connecting member 21 and the second connecting member 22 are both cylindrical structures, and can also be set as prismatic structures. As for the connecting mechanism, it can also be set as a sliding connection method of a slide rail slider, and the sliding direction is the vertical direction. In short, it is only necessary to set the connecting mechanism to a telescopic sliding structure.

[0042] When replacing the embroidery needle 101 (embroidery thread) for multi-color embroidery, the stopped embroidery needle 101-A deviates from the needle hole 105, and since the guide protection plate 1 and the needle bar frame 103 move left and right synchronously, the replaced embroidery thread 106-A is constrained by the needle hole 1-A of the guide protection plate 1, so that the part of the replaced embroidery thread 106-A located between the guide protection plate 1 and the stopped embroidery needle 101-A is still in a vertical tensioned state, and the part of the replaced embroidery thread 106-A located between the guide protection plate 1 and the cloth pressing end 104-A of the presser foot 104 is in an oblique tensioned state. Therefore, the tensioning force of the replaced embroidery thread 106-A acting on the embroidery needle 101-A is in a vertical direction, the working embroidery thread 106 is in a vertical state, and the tensioning force on the working embroidery needle 106 is also in a vertical direction. This arrangement can avoid the problem in the prior art that the embroidery needle is completely deformed due to the oblique tensioning force of the replaced embroidery thread on the embroidery needle.

[0043] When the fabric needs to be replaced after embroidery is completed, the presser foot 104 needs to be lifted up for replacement. The lifting cylinder 31 is driven first. Since the second connecting member 22 can slide upward along the first connecting member 21, the guide protective plate 1 can be driven to lift up. At this time, the presser foot 104 is lifted up again. After replacing the fabric, the lifting cylinder 31 is driven to reset the guide protective plate 1. At this time, the presser foot 104 is pressed down again. This lifting method of the guide protective plate 1 is active lifting.

[0044] Implementation Case 2:

[0045] Reference Figure 4 , an embroidery thread guiding and embroidery needle protecting device for an independent presser foot embroidery machine head, comprising a guiding and protecting plate 1, two connecting mechanisms, and a restoring spring 3. The guiding and protecting plate 1 is horizontally arranged, and the direction of the guiding and protecting plate 1 is arranged along the arrangement direction of the needle bars 102. The guiding and protecting plate 1 has a plurality of needle holes 1-A, and the number of the needle holes 1-A matches the number of the needle bars 102, and the position of the needle holes 1-A is located directly below the embroidery needle 101 of the needle bar 102. During embroidery, the horizontal height of the guide protection plate 1 is above the highest point of the movement of the cloth pressing end 104-A of the presser foot 104, and below the lowest point of the movement of the bottom end of the needle bar 102, that is, during the embroidery process, the bottom surface of the guide protection plate 1 will not contact the cloth pressing end 104-A of the presser foot 104, and the top surface will not contact the bottom end of the needle bar 102, and the embroidery needle 101 passes through the guide protection plate 1 through the needle hole 1-A, and passes downward through the cloth pressing end 104-A of the presser foot 104, the cloth and the needle hole in turn, and the cloth pressing end 104-A of the presser foot 104 is an open structure.

[0046] The two connecting mechanisms are arranged at the left and right ends of the guide and protection plate 1, and include a first connecting member 21 and a second connecting member 22. The first connecting member 21 and the second connecting member 22 are both arranged vertically, and the first connecting member 21 is slidably sleeved on the second connecting member 22. Connecting seats 23 are respectively fixedly arranged at the left and right ends of the bottom of the needle bar frame 103, and the top ends of the two first connecting members 21 are respectively fixedly connected to the two connecting seats 23, that is, the connection mode between the connecting mechanism and the needle bar frame 103 is direct connection, and the bottom ends of the two second connecting members 22 are respectively fixedly connected to the left and right ends of the guide and protection plate 1. The second connecting member 22 can slide upward along the first connecting member 21, that is, it constitutes the lifting structure of the connecting mechanism. The return spring 3 is assembled in the connection mechanism. In this embodiment, the connection method is that the return spring 3 is sleeved outside the first connection member 21 and the second connection member 22. The bottom end of the return spring 3 is connected to the guide protection plate 1, and the top end of the return spring 3 is connected to the bottom of the connection seat 23. The top end of the return spring 3 can also be connected to the first connection member 21. As for the structural relationship between the first connection member 21 and the second connection member 22, it can also be set that the second connection member 22 is slidably sleeved on the first connection member 21, and the effect is similar to the method provided in this embodiment. Compared with this structural setting, in this embodiment, the diameter of the first connection member 21 is larger than that of the second connection member 22, and the large-diameter first connection member 21 is a component directly connected to the connection seat 23, and the overall structure after fixed connection is more stable. In this embodiment, the first connection member 21 and the second connection member 22 are both cylindrical structures, and can also be set as prismatic structures. For the connecting mechanism, it can also be set as a sliding connection method of the slide rail slider, and the sliding direction is the vertical direction. In this way, the slider can be connected to the guide protective plate, and the return spring connects the slider and the guide rail or the connecting seat. In short, it is only necessary to set the connecting mechanism as a retractable sliding structure and set a return spring to reset the guide protective plate.

[0047] When the fabric needs to be replaced after embroidery is completed, the presser foot 104 needs to be lifted up for replacement. When the presser foot 104 is lifted up, the presser foot 104 applies a vertical upward force to the guide protective plate 1. Since the second connecting member 22 can slide upward along the first connecting member 21, the presser foot 104 can drive the guide protective plate 1 to be lifted up. At this time, the restoring spring 3 is in a compressed state. After replacing the fabric, the presser foot 104 is pressed down, and the guide protective plate 1 can be quickly reset due to the elastic force of the restoring spring 3. This lifting mode of the guide protective plate 1 is passive lifting.

[0048] Implementation Case 3:

[0049] Reference Figure 5, an embroidery thread guiding and embroidery needle protecting device for an independent presser foot embroidery machine head, comprising a guiding and protecting plate 1, two connecting mechanisms, and a lifting cylinder 31. The guiding and protecting plate 1 is horizontally arranged, and the direction of the guiding and protecting plate 1 is arranged along the arrangement direction of the needle bars 102. The guiding and protecting plate 1 has a plurality of needle holes 1-A, and the number of the needle holes 1-A matches the number of the needle bars 102, and the position of the needle holes 1-A is located directly below the embroidery needle 101 of the needle bar 102. During embroidery, the horizontal height of the guide protection plate 1 is above the highest point of the movement of the cloth pressing end 104-A of the presser foot 104, and below the lowest point of the movement of the bottom end of the needle bar 102, that is, during the embroidery process, the bottom surface of the guide protection plate 1 will not contact the cloth pressing end 104-A of the presser foot 104, and the top surface will not contact the bottom end of the needle bar 102, and the embroidery needle 101 passes through the guide protection plate 1 through the needle hole 1-A, and passes downward through the cloth pressing end 104-A of the presser foot 104, the cloth and the needle hole in turn, and the cloth pressing end 104-A of the presser foot 104 is an open structure.

[0050] The two connecting mechanisms are arranged at the left and right ends of the guide and protection plate 1, and include a first connecting member 21 and a second connecting member 22. The first connecting member 21 and the second connecting member 22 are both arranged vertically. The first connecting member 21 is slidably sleeved on the second connecting member 22. A lower thread 24 arranged along the arrangement direction of the needle bars 102 is arranged at the bottom of the needle bar frame 103. A connecting seat 23 is fixed at the top of the two first connecting members 21, and a lower thread 24 is fixed at the bottom of the needle bar frame 103. The two connecting seats 23 are respectively fixedly connected to the two ends of the lower thread 24, that is, the connection between the connecting mechanism and the needle bar frame 103 is indirect connection. The lower thread 24 has a plurality of through holes 24-A for embroidery thread to pass through. The bottom ends of the two second connecting members 22 are respectively fixedly connected to the left and right ends of the guide and protection plate 1. The second connecting member 22 can slide upward along the first connecting member 21, that is, it constitutes the lifting structure of the connecting mechanism. The lifting cylinder 31 is installed on the needle bar frame 103, and the piston rod 32 of the lifting cylinder 31 is vertically arranged, the top end is assembled on the output end of the lifting cylinder 31, and the bottom end is connected to the guide protection plate 1. As for the structural relationship between the first connecting member 21 and the second connecting member 22, it can also be set that the second connecting member 22 is slidably sleeved on the first connecting member 21, and the effect is similar to the method provided in this embodiment. Compared with this structural setting, in this embodiment, the diameter of the first connecting member 21 is larger than that of the second connecting member 22, and the large-diameter first connecting member 21 is a component directly connected to the lower wire 24, and the overall structure after fixed connection is more stable. In this embodiment, the first connecting member 21 and the second connecting member 22 are both cylindrical structures, and can also be set as prismatic structures.

[0051] When the fabric needs to be replaced after embroidery is completed, the presser foot 104 needs to be lifted up for replacement. The lifting cylinder 31 is driven first. Since the second connecting member 22 can slide upward along the first connecting member 21, the guide protective plate 1 can be driven to lift up. At this time, the presser foot 104 is lifted up again. After replacing the fabric, the lifting cylinder 31 is driven to reset the guide protective plate 1. At this time, the presser foot 104 is pressed down again. This lifting method of the guide protective plate 1 is active lifting.

[0052] Implementation Case 4:

[0053] Reference Figure 6 , an embroidery thread guiding and embroidery needle protecting device for an independent presser foot embroidery machine head, comprising a guiding and protecting plate 1, two connecting mechanisms, and two restoring springs 3. The guiding and protecting plate 1 is horizontally arranged, and the direction of the guiding and protecting plate 1 is arranged along the arrangement direction of the needle bars 102. The guiding and protecting plate 1 has a plurality of needle holes 1-A, and the number of the needle holes 1-A matches the number of the needle bars 102, and the position of the needle holes 1-A is located directly below the embroidery needle 101 of the needle bar 102. During embroidery, the horizontal height of the guide protection plate 1 is above the highest point of the movement of the cloth pressing end 104-A of the presser foot 104, and below the lowest point of the movement of the bottom end of the needle bar 102, that is, during the embroidery process, the bottom surface of the guide protection plate 1 will not contact the cloth pressing end 104-A of the presser foot 104, and the top surface will not contact the bottom end of the needle bar 102, and the embroidery needle 101 passes through the guide protection plate 1 through the needle hole 1-A, and passes downward through the cloth pressing end 104-A of the presser foot 104, the cloth and the needle hole in turn, and the cloth pressing end 104-A of the presser foot 104 is an open structure.

[0054] The two connecting mechanisms are arranged at the left and right ends of the guide and protection plate 1, and include a first connecting member 21 and a second connecting member 22. The first connecting member 21 and the second connecting member 22 are both arranged vertically. The first connecting member 21 is slidably sleeved on the second connecting member 22. A lower thread 24 arranged along the arrangement direction of the needle bars 102 is arranged at the bottom of the needle bar frame 103. The top ends of the two first connecting members 21 are respectively fixedly connected to the two ends of the lower thread 24, that is, the connection mode between the connecting mechanism and the needle bar frame 103 is direct connection. The lower thread 24 has a plurality of through holes 24-A for allowing the embroidery thread to pass through. The bottom ends of the two second connecting members 22 are respectively fixedly connected to the left and right ends of the guide and protection plate 1. The second connecting member 22 can slide upward along the first connecting member 21, that is, it constitutes the lifting structure of the connecting mechanism. The recovery spring 3 is sleeved outside the first connecting member 21 and the second connecting member 22. The top end of the recovery spring 3 is connected to the bottom of the lower thread 24, and the bottom end of the recovery spring 3 is connected to the guide and protection plate 1. As for the structural relationship between the first connecting member 21 and the second connecting member 22, it can also be set that the second connecting member 22 is slidably mounted on the first connecting member 21, and the effect is similar to the method provided in this embodiment. Compared with this structural setting, in this embodiment, the diameter of the first connecting member 21 is larger than that of the second connecting member 22, and the first connecting member 21 with a large diameter is directly connected to the lower wire 24, and the overall structure after fixed connection is more stable. In this embodiment, the first connecting member 21 and the second connecting member 22 are both cylindrical structures, and can also be set as prismatic structures.

[0055] When the fabric needs to be replaced after embroidery is completed, the presser foot 104 needs to be lifted up for replacement. When the presser foot 104 is lifted up, the presser foot 104 applies a vertical upward force to the guide protective plate 1. Since the second connecting member 22 can slide upward along the first connecting member 21, the presser foot 104 can drive the guide protective plate 1 to be lifted up. At this time, the restoring spring 3 is in a compressed state. After replacing the fabric, the presser foot 104 is pressed down, and the guide protective plate 1 can be quickly reset due to the elastic force of the restoring spring 3. This lifting mode of the guide protective plate 1 is passive lifting.

[0056] Implementation Case 5:

[0057] Reference Figure 7, an embroidery thread guiding and embroidery needle protecting device for an independent presser foot embroidery machine head, comprising a guiding and protecting plate 1, two connecting mechanisms, and a lifting cylinder 31. The guiding and protecting plate 1 is horizontally arranged, and the direction of the guiding and protecting plate 1 is arranged along the arrangement direction of the needle bars 102. The guiding and protecting plate 1 has a plurality of needle holes 1-A, and the number of the needle holes 1-A matches the number of the needle bars 102, and the position of the needle holes 1-A is located directly below the embroidery needle 101 of the needle bar 102. During embroidery, the horizontal height of the guide protection plate 1 is above the highest point of the movement of the cloth pressing end 104-A of the presser foot 104, and below the lowest point of the movement of the bottom end of the needle bar 102, that is, during the embroidery process, the bottom surface of the guide protection plate 1 will not contact the cloth pressing end 104-A of the presser foot 104, and the top surface will not contact the bottom end of the needle bar 102, and the embroidery needle 101 passes through the guide protection plate 1 through the needle hole 1-A, and passes downward through the cloth pressing end 104-A of the presser foot 104, the cloth and the needle hole in turn, and the cloth pressing end 104-A of the presser foot 104 is an open structure.

[0058] The two connecting mechanisms are arranged at the left and right ends of the guide and protection plate 1, and include a connecting member 21 and a set 22. The top ends of the two connecting members 21 are respectively fixed with the two sets 22, and the bottom ends of the two connecting members 21 are fixedly connected with the left and right ends of the guide and protection plate 1. The two sets 22 are slidably sleeved on the two needle bars 102, and the needle bars 102 are installed on the needle bar frame 103, so the connecting mechanism is indirectly connected to the needle bar frame 103. A mounting plate 23 is arranged horizontally and along the arrangement direction of the needle bars 102, and the two sets 22 are respectively fixed at the two ends of the mounting plate 23. The lifting cylinder 31 is installed on the needle bar frame 103, and the piston rod 32 of the lifting cylinder 31 is arranged vertically, with the top end assembled on the output end of the lifting cylinder 31 and the bottom end connected to the mounting plate 23.

[0059] When the fabric needs to be replaced after embroidery is completed, the presser foot 104 needs to be lifted for replacement. The lifting cylinder 31 is driven first. Since the kit 22 is slidably mounted on the needle rod 102, the guide protection plate 1 can be driven to lift upward. At this time, the presser foot 104 is lifted again. After replacing the fabric, the lifting cylinder 31 is driven to reset the guide protection plate 1. At this time, the presser foot 104 is pressed down again. This lifting method of the guide protection plate 1 is active lifting.

[0060] Implementation Case 6:

[0061] Reference Figure 8, an embroidery thread guiding and embroidery needle protecting device for an independent presser foot embroidery machine head, comprising a guiding and protecting plate 1, two connecting mechanisms, and two restoring springs 3. The guiding and protecting plate 1 is horizontally arranged, and the direction of the guiding and protecting plate 1 is arranged along the arrangement direction of the needle bars 102. The guiding and protecting plate 1 has a plurality of needle holes 1-A, and the number of the needle holes 1-A matches the number of the needle bars 102, and the position of the needle holes 1-A is located directly below the embroidery needle 101 of the needle bar 102. During embroidery, the horizontal height of the guide protection plate 1 is above the highest point of the movement of the cloth pressing end 104-A of the presser foot 104, and below the lowest point of the movement of the bottom end of the needle bar 102, that is, during the embroidery process, the bottom surface of the guide protection plate 1 will not contact the cloth pressing end 104-A of the presser foot 104, and the top surface will not contact the bottom end of the needle bar 102, and the embroidery needle 101 passes through the guide protection plate 1 through the needle hole 1-A, and passes downward through the cloth pressing end 104-A of the presser foot 104, the cloth and the needle hole in turn, and the cloth pressing end 104-A of the presser foot 104 is an open structure.

[0062] The two connecting mechanisms are arranged at the left and right ends of the guide guard plate 1, and include a connecting member 21 and a sleeve 22. The top ends of the two connecting members 21 are respectively fixed to the two sleeves 22, and the bottom ends of the two connecting members 21 are fixedly connected to the left and right ends of the guide guard plate 1. The two sleeves 22 are slidably sleeved on the two needle bars 102, and the needle bars 102 are installed on the needle bar frame 103, so the connecting mechanism is indirectly connected to the needle bar frame 103. The two restoring springs 3 are respectively sleeved on the two needle bars 102 with the sleeves 22, the top ends of the restoring springs 3 are connected to the middle of the needle bars 102, and the bottom ends of the restoring springs 3 are connected to the sleeves 22.

[0063] When the fabric needs to be replaced after embroidery is completed, the presser foot 104 needs to be lifted up for replacement. When the presser foot 104 is lifted up, the presser foot 104 applies a vertical upward force to the guide protective plate 1. Since the kit 22 can slide upward along the needle rod 102, the presser foot 104 can drive the guide protective plate 1 to be lifted up. At this time, the restoring spring 3 is in a compressed state. After replacing the fabric, the presser foot 104 is pressed down, and the guide protective plate 1 can be quickly reset due to the elastic force of the restoring spring 3. This lifting mode of the guide protective plate 1 is passive lifting.

[0064] Implementation Case 7:

[0065] Reference Fig. 9, an embroidery thread guiding and embroidery needle protecting device for an independent presser foot embroidery machine head, comprising a guiding and protecting plate 1, two connecting mechanisms, and a lifting cylinder 31. The guiding and protecting plate 1 is horizontally arranged, and the direction of the guiding and protecting plate 1 is arranged along the arrangement direction of the needle bars 102. The guiding and protecting plate 1 has a plurality of needle holes 1-A, and the number of the needle holes 1-A matches the number of the needle bars 102, and the position of the needle holes 1-A is located directly below the embroidery needle 101 of the needle bar 102. During embroidery, the horizontal height of the guide protection plate 1 is above the highest point of the movement of the cloth pressing end 104-A of the presser foot 104, and below the lowest point of the movement of the bottom end of the needle bar 102, that is, during the embroidery process, the bottom surface of the guide protection plate 1 will not contact the cloth pressing end 104-A of the presser foot 104, and the top surface will not contact the bottom end of the needle bar 102, and the embroidery needle 101 passes through the guide protection plate 1 through the needle hole 1-A, and passes downward through the cloth pressing end 104-A of the presser foot 104, the cloth and the needle hole in turn, and the cloth pressing end 104-A of the presser foot 104 is an open structure.

[0066] The two connecting mechanisms are arranged at the left and right ends of the guide protection plate 1, and include a connecting member 21 and a set 22. The top ends of the two connecting members 21 are respectively fixed with the two sets 22, and the bottom ends of the two connecting members 21 are fixedly connected with the left and right ends of the guide protection plate 1. The two sets 22 are slidably sleeved on the two needle bars 102, and the needle bars 102 are installed on the needle bar frame 103, so the connecting mechanism is indirectly connected to the needle bar frame 103. The lifting cylinder 31 is installed on the needle bar frame 103, and the piston rod 32 of the lifting cylinder 31 is vertically arranged, with the top end assembled on the output end of the lifting cylinder 31 and the bottom end connected to the guide protection plate 1.

[0067] When the fabric needs to be replaced after embroidery is completed, the presser foot 104 needs to be lifted for replacement. The lifting cylinder 31 is driven first. Since the kit 22 is slidably mounted on the needle rod 102, the guide protection plate 1 can be driven to lift upward. At this time, the presser foot 104 is lifted again. After replacing the fabric, the lifting cylinder 31 is driven to reset the guide protection plate 1. At this time, the presser foot 104 is pressed down again. This lifting method of the guide protection plate 1 is active lifting.

[0068] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with the technology in this field to understand the content of the present invention and implement it, and they cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. An embroidery thread guide and embroidery needle protection device for an independent presser foot embroidery machine head, characterized in that: It includes a guide protection plate and at least one connecting mechanism, which is fixedly connected to the guide protection plate. The connecting mechanism is directly or indirectly connected to the needle bar frame. During embroidery, the guide protection plate is located above the highest point of the movement of the cloth pressing end of the presser foot and below the lowest point of the movement of the bottom end of the needle bar. The guide protection plate is provided with a needle hole directly below each embroidery needle, so that the part of the stopped embroidery thread between the embroidery needle and the guide protection plate is in a vertical state; the cloth pressing end of the presser foot is an open structure.

2. The embroidery thread guide and embroidery needle protection device for the head of an independent presser foot embroidery machine according to claim 1, characterized in that: The connecting mechanism has a lifting structure, which can drive the guiding protection plate to lift upward when the guiding protection plate is subjected to an upward force.

3. The embroidery thread guide and embroidery needle protection device for the head of an independent presser foot embroidery machine according to claim 2, characterized in that: The connecting mechanism includes a first connecting member and a second connecting member. The first connecting member is slidably connected or slidably connected to the second connecting member, and the sliding direction is a vertical direction. The first connecting member is connected to the needle bar frame, and the second connecting member is connected to the guide protection plate.

4. The embroidery thread guide and embroidery needle protection device for an independent presser foot embroidery machine head according to claim 3, characterized in that: The connecting mechanism also includes a connecting component, which is configured as a connecting seat, the connecting seat is fixed to the needle bar frame, and the first connecting member is fixed to the connecting seat.

5. The embroidery thread guide and embroidery needle protection device for the head of an independent presser foot embroidery machine according to claim 3, characterized in that: The connecting mechanism also includes a connecting component, which is configured as a connecting seat, which is fixed on a lower thread passing line, which is fixed to a needle bar frame, and the lower thread passing line has a plurality of through holes for allowing embroidery thread to pass through, and the first connecting member is fixed on the connecting seat.

6. The embroidery thread guide and embroidery needle protection device for the head of an independent presser foot embroidery machine according to claim 4 or 5, characterized in that: The connecting mechanism is equipped with a return spring for returning the guide guard plate to its original position after being lifted.

7. The embroidery thread guide and embroidery needle protection device for an independent presser foot embroidery machine head according to claim 4 or 5, characterized in that: The needle bar frame is equipped with a lifting cylinder, and the piston rod of the lifting cylinder is connected to the guide protection plate.

8. The embroidery thread guide and embroidery needle protection device for an independent presser foot embroidery machine head according to claim 2, characterized in that: The connecting mechanism comprises a connecting piece and a sleeve. The top and bottom ends of the connecting piece are respectively connected to the sleeve and the guide protection plate. The sleeve is slidably sleeved on the needle rod.

9. The embroidery thread guide and embroidery needle protection device for the head of an independent presser foot embroidery machine according to claim 8, characterized in that: The needle bar sleeve is provided with a restoring spring, the top end of which is connected to the lower dead point of the needle bar, and the bottom end of which is connected to the sleeve, so as to reset the guide guard plate after it is lifted.

10. The embroidery thread guide and embroidery needle protection device for the head of an independent presser foot embroidery machine according to claim 8, characterized in that: The needle bar frame is equipped with a lifting cylinder, and the piston rod of the lifting cylinder is connected to the guide protection plate or the connecting mechanism.

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