Needle bar frame of high-speed embroidery machine

Abstract

The present invention discloses a needle bar frame of a high-speed embroidery machine, comprising a needle bar frame, a needle bar mounted on the needle bar frame and a presser foot matched therewith, the presser foot comprising a presser foot rod and a presser foot structure connected to the bottom end of the presser foot rod, the presser foot structure is provided with a first thread clamping structure and a second thread clamping structure, the two are used to pass a hook knife, the first thread clamping structure can move relative to the second thread clamping structure and can be reset, the first thread clamping structure is in contact with the second thread clamping structure when in the reset position, the presser foot rod is provided with a matching structure, the needle bar frame is provided with a locking structure for blocking the forward movement of the matching structure, and the needle bar frame is provided with an unlocking mechanism that can make the locking structure and the matching structure relatively displaced, so as to release the blocking effect of the locking structure on the matching structure. The beneficial effect of the present invention is that it has a high functional integration and achieves the technical purpose of stably maintaining the clamping of the upper thread.

Description

Technical Field

[0001] The invention relates to a needle bar frame of a high-speed embroidery machine, which is applied in the technical field of embroidery machines. Background Art

[0002] The presser foot on the embroidery machine is the component that completes the cloth pressing action during the embroidery process of the embroidery machine, and the thread hook plate on the embroidery machine is the component that cooperates with the thread cutting device. That is, when the thread needs to be cut, the embroidery machine stops working, and the thread hook plate moves back and forth under the action of the corresponding driving mechanism, thereby hooking up the surface thread on the fabric that needs to be cut, and then the thread cutting operation is realized under the action of the thread cutting device.

[0003] The prior art CN201620415947.3 discloses a surface thread clamping device and an embroidery machine head. The surface thread clamping device disclosed therein includes a fixed frame and a row of movable rods movably passing through the fixed frame, and a movable block is fixed on the movable rod.

[0004] For example, the prior art CN201921180454.6 discloses a buffered independent presser foot mechanism, in which a reset spring is provided on the presser foot lifting rod, and the reset spring is located between the driving seat and the lower connecting gear, and is used to achieve reset through elastic force after the presser foot lifting rod slides downward.

[0005] Of these two existing technologies, the former is relatively complex in both structure and power composition, has a relatively high failure rate during operation, and occupies a large installation space of the needle bar frame, which is not conducive to the arrangement of other components and is prone to mechanical interference problems. The latter has poor operating stability of the presser foot and is prone to positional deviation problems, which is not conducive to maintaining an efficient and stable state of the needle bar frame. Summary of the invention

[0006] The technical problem to be solved by the present invention is to provide a needle bar frame of a high-speed embroidery machine, which has a high functional integration and achieves the technical purpose of stably maintaining the clamping of the upper thread.

[0007] The present invention is achieved through the following technical solutions.

[0008] A needle bar frame of a high-speed embroidery machine comprises a needle bar frame, a needle bar mounted on the needle bar frame and a presser foot matched therewith, the presser foot comprising a presser foot rod and a presser foot structure connected to the bottom end of the presser foot rod, the presser foot structure is provided with a first thread clamping structure and a second thread clamping structure, a hook knife is passed between the two, the first thread clamping structure is movable relative to the second thread clamping structure and can be reset, the first thread clamping structure is in contact with the second thread clamping structure when in the reset position, the presser foot rod is provided with a matching structure, the needle bar frame is provided with a locking structure for blocking the forward movement of the matching structure, and the needle bar frame is provided with an unlocking mechanism that can cause the locking structure and the matching structure to undergo relative displacement, so as to release the blocking effect of the locking structure on the matching structure.

[0009] The needle bar frame of the present invention has a presser foot that realizes the function of clamping the surface thread through the first thread clamping structure and the second thread clamping structure, thereby avoiding the detachment of the surface thread. The matching structure and the locking structure can ensure that the presser foot can be better maintained in a certain position in a non-working state, thereby avoiding affecting the presser foot in a working state, so that the clamped surface thread maintains its position and will not be captured by other components to destroy the clamping state, thereby ensuring the normal state for subsequent embroidery and improving the embroidery quality. In addition, the first thread clamping structure, the second thread clamping structure, the matching structure, and the locking structure are integrated in the presser foot, thereby improving the functional integration of the needle bar frame.

[0010] As a further improvement of the present invention, the first wire clamping structure is a flat plate-like structure, the second wire clamping structure is a columnar structure, the first wire clamping structure has a middle part in contact with the side of the second wire clamping structure, and side parts connecting the two ends of the middle part, and the two side parts are inclined relative to the middle part in a direction away from the second wire clamping structure.

[0011] As a further improvement of the present invention, the presser foot includes a presser foot rod, a presser foot cover wrapped and fixed at the bottom end of the presser foot rod, a cloth pressing end used for pressing cloth and allowing the embroidery needle of the needle bar to pass through, and a presser foot bracket connecting the two, the presser foot cover has two spaced-apart lugs and a connecting shaft is connected between the two lugs, and one end of the first wire clamping structure is connected to the connecting shaft.

[0012] As a further improvement of the present invention, one end of the first wire clamping structure has a ring fixedly sleeved on the connecting shaft, and the first wire clamping structure is made of elastic material.

[0013] As a further improvement of the present invention, one end of the first wire clamping structure has a ring slidably sleeved on the connecting shaft, the connecting shaft sleeve is provided with a torsion spring, the ring is provided with a notch groove, and the portion of the connecting shaft corresponding to the notch groove is sleeved with a torsion spring, and the two ends of the torsion spring respectively abut against the first wire clamping structure and the pressure foot.

[0014] As a further improvement of the present invention, the locking structure and the matching structure respectively have a first contact surface and a second contact surface that contact each other, and the first contact surface and the second contact surface are arranged to be inclined relative to the axial direction of the presser foot rod.

[0015] As a further improvement of the present invention, the unlocking mechanism includes a guide shaft, an installation base provided with the locking structure, and a first mounting plate fixed to the needle bar frame, one end of the guide shaft is fixed to the first mounting plate, the installation base is slidably sleeved on the guide shaft and moves along its axial direction, or the guide shaft is slidably inserted in the first mounting plate and can move along its axial direction, the installation base is fixed on the guide shaft, and a section of the guide shaft located between the installation base and the first mounting plate is sleeved with a reset spring.

[0016] As a further improvement of the present invention, with the direction of positive movement of the matching structure as a reference, the distal end of the first contact surface is connected to a third contact surface, and the third contact surface is inclined relative to the axial direction of the presser foot rod and the inclination direction is opposite to that of the first contact surface.

[0017] As a further improvement of the present invention, the unlocking mechanism also includes a second mounting plate fixed to the needle bar frame, and the other end of the guide shaft is fixedly or slidably inserted in the second mounting plate.

[0018] Beneficial effects of the present invention:

[0019] 1: The first thread clamping structure and the second thread clamping structure realize the clamping function of the upper thread. The structure is relatively simple and reduces the failure rate. At the same time, the clamping effect of the upper thread is better, and the upper thread will not be separated;

[0020] 2: The first thread clamping structure and the second thread clamping structure are functionally integrated with the presser foot, which can simplify the overall structure of the needle bar frame and save installation space, thereby avoiding mechanical interference with other components;

[0021] 3: The matching structure and locking structure of the presser foot can keep the presser foot in a certain position when not in working state, so as to avoid affecting the presser foot in working state, so that the clamped upper thread can keep its position, and the presser foot will not be caught by other parts of the embroidery machine due to the movement of the presser foot to destroy the clamping state of the upper thread, which can ensure that the clamped upper thread enters the subsequent embroidery process in a normal state, further stabilizing the embroidery quality of the embroidery cloth;

[0022] 4: The functions of upper thread clamping and presser foot position keeping are integrated into the presser foot, and the structural integration with the presser foot itself is high, and the integration stability is also high, which not only makes the whole have a high functional integration, but also improves the stability of the needle bar frame during high-speed operation of the embroidery machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings to help understand the purpose and advantages of the present invention, wherein:

[0024] Figure 1A schematic diagram of a needle bar frame of a high-speed embroidery machine from a frontal perspective;

[0025] Figure 2 A schematic diagram of a needle bar frame of a high-speed embroidery machine from a rearward perspective;

[0026] Figure 3 It is a schematic diagram of the structure of the presser foot, needle bar and hook knife;

[0027] Figure 4 is a schematic diagram of the structure of the presser foot;

[0028] Figure 5 It is a schematic diagram of a state where the hook knife has not passed through the first wire clamping structure and the second wire clamping structure;

[0029] Figure 6 It is a schematic diagram of a state in which a hook knife passes through a first wire clamping structure and a second wire clamping structure;

[0030] Figure 7 is a structural schematic diagram of a first wire clamping structure;

[0031] Figure 8 for Figure 2 A partial enlarged schematic diagram of

[0032] Fig. 9 for Figure 2 A partial schematic diagram from another perspective;

[0033] Fig.10 yes Figure 2 Schematic diagram of the specific structure of the unlocking mechanism;

[0034] Fig.11 yes Figure 2 Specific structural diagram of the matching structure;

[0035] Fig.12 This is a diagram showing the relative positions of the matching structure and the locking structure when the presser foot is in a non-working state;

[0036] Fig.13 This is a diagram showing the relative position relationship between the matching structure and the locking structure when the presser foot is about to leave the locking state;

[0037] Fig.14 This is a diagram showing the relative positions of the matching structure and the locking structure when the presser foot is reset after completing its work. DETAILED DESCRIPTION

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

[0039] The directional terms such as up, down, left, right, front, back, front, back, top, bottom, etc. mentioned or may be mentioned in this specification are defined relative to the structures shown in the drawings. The words "inside" and "outside" refer to the direction toward or away from the geometric center of a specific component, respectively. They are relative concepts, and therefore may change accordingly according to different locations and different usage conditions. Therefore, these or other directional terms should not be interpreted as restrictive terms.

[0040] Reference Figure 1-Figure 14 The present invention, the needle bar frame of the high-speed embroidery machine includes a needle bar frame 6, a needle bar 31 installed on the needle bar frame 6 and a presser foot 2 matched therewith, an embroidery needle 3 is installed on the bottom end of the needle bar 31, and a hook knife 4 is also arranged on the head of the high-speed embroidery machine, and the lower end 41 of the hook knife 4 is set to be hook-shaped, and the hook knife 4 is connected to a driving mechanism 5 for driving it to move back and forth and making its lower end realize the thread hooking operation, and the driving mechanism 5 can be composed of transmission components such as a motor and a cam. The presser foot 2 is provided with a first wire clamping structure 21 and a second wire clamping structure 22. In the present embodiment, the first wire clamping structure 21 is a flat plate-like structure, and the second wire clamping structure 22 is a cylindrical structure, which can be specifically a pin shaft. The second wire clamping structure 22 is fixed to the presser foot 2. The first wire clamping structure 21 can move relative to the second wire clamping structure 22 and can be reset. When the first wire clamping structure 21 is reset, it contacts with the second wire clamping structure 22, i.e., the gap therebetween is closed. When the hook knife 4 moves back and forth, the lower end 41 of the hook knife 4 acts on the first wire clamping structure 21, causing it to move and separate from the second wire clamping structure 22, so that the hook knife 4 passes between the first wire clamping structure 21 and the second wire clamping structure 22.

[0041] Specifically, when hooking the thread, the hook knife 4 is extended out under the drive of the driving mechanism 5, and passes through the first thread clamping structure 21 and the second thread clamping structure 22, and hooks the surface thread. Then, on the return journey, the hook knife 4 retracts from the outer circumferential surfaces of the first thread clamping structure 21 and the second thread clamping structure 22, and the hooked surface thread is clamped between the first thread clamping structure 21 and the second thread clamping structure 22, that is, as the hook knife 4 hooks the thread, the surface thread is clamped at the same time. This is not only convenient to operate and has a simple structure, but also does not require an additional driving mechanism to clamp the surface thread. Moreover, the surface thread clamping structure is integrated on the presser foot 2, and the entire machine head structure becomes compact, occupies little space, and is also easy to install.

[0042] The presser foot 2 includes a presser foot rod 23, a presser foot sleeve 25, a presser foot bracket 28, and a cloth pressing end 29. The lower end of the presser foot rod 23 is fixedly sleeved with a fixing seat 24, and the upper end of the presser foot 2 is correspondingly configured to cover the presser foot sleeve 25 fixed on the outer peripheral surface of the fixing seat 24. The presser foot sleeve 25 has a vertical opening, and two spaced-apart lugs extend from both sides of the opening. A connecting shaft 2-A is installed between the two lugs. The cloth pressing end 29 has a presser foot through hole 291 that allows the embroidery needle 3 to pass through, and is used to press on the embroidery cloth. The presser foot bracket 28 connects the cloth pressing end 29 and the presser foot sleeve 25.

[0043] The first wire clamping structure 21 has two schemes. In the first implementation case, the first wire clamping structure 21 is fixedly connected to the connecting shaft 2-A, and the first wire clamping structure 21 is made of a material with a certain elasticity. When the first wire clamping structure 21 is not subjected to a force (hook knife 4), the first wire clamping structure 21 is in contact with the second wire clamping structure 22, and the force of mutual support between the two should not be too large, and only needs to be sufficient to hook the surface line. When the hook knife 4 passes between the first wire clamping structure 21 and the second wire clamping structure 22, under the thrust of the hook knife 4, the first wire clamping structure 21 is bent and deformed to allow the hook knife 4 to pass through. When the hook knife 4 is retracted, the first wire clamping structure 21 is restored to its original shape and maintains contact with the second wire clamping structure 22 so that the surface line is clamped by the two.

[0044] In the second implementation case, the first clamping structure 21 is hingedly matched with the presser foot 2 through the connecting shaft 2-A. One end of the first clamping structure 21 has a ferrule 211, which is sleeved on the connecting shaft 2-A. The two sides of the opening of the presser foot sleeve 25 correspond to the axial clamping of the presser foot spring ferrule 211. The torsion spring 27 is sleeved on the connecting shaft 2-A. The middle of the ferrule 211 of the first clamping structure 21 is correspondingly provided with a notch groove 212 for accommodating the torsion spring 27. The two ends of the torsion spring 27 extend outward and press against the first clamping structure 21 and the fixed seat 24 respectively. This arrangement is not only easy to install, but also makes the hinged swing of the first clamping structure 21 stable and reliable, and will not shift, thereby effectively ensuring the reliability of the surface thread clamping. In addition, in the first implementation case, a ferrule 211 can also be provided at one end of the first clamping structure 21.

[0045] The upper end portion 211 includes a middle portion 213 and side portions 214 connected to both ends thereof, wherein the middle portion 213 has a certain inclination angle and is arranged to be parallel to the moving direction of the hook knife 4 as the best solution, wherein the middle portion 213 is tangentially pressed against the outer circumferential surface of the second wire clamping structure 22, and the side portions 214 on both sides of the middle portion 213 are inclined relative to the middle portion 213 and are inclined in a direction away from the second wire clamping structure 22. When the hook knife 4 moves back and forth, its lower end 41 passes between the middle portion 213 and the second wire clamping structure 22, which helps the hook knife 4 to be inserted between the first wire clamping structure 21 and the second wire clamping structure 22, and to pass through the first wire clamping structure 21 and the second wire clamping structure 22 smoothly. When the hooked surface wire passes through the surface wire clamping structure, the friction between each other is also small, and the surface wire is not easy to break, which is more helpful for the hook plate to pull the panel through the surface wire clamping structure.

[0046] The presser foot rod 23 is fixedly sleeved with a positioning block 32, and one side of the positioning block 32 is correspondingly formed with a C-shaped positioning portion 33 that is sleeved on the needle rod 31. In this way, the positioning portion 33 can play a positioning and guiding role in the lifting and lowering movement of the needle rod 31, and at the same time, the presser foot rod 23 and the needle rod 31 are effectively combined together to increase the stability of the structure. In addition, the presser foot sleeve 25, the fixed seat 24 and the presser foot rod 23 are riveted together and fixed by a pin shaft 30. This is more convenient to install and more secure and reliable after installation.

[0047] The presser foot rod 23 is provided with a matching structure 7, the needle bar frame 6 is provided with a locking structure 8 and an unlocking mechanism 9, the unlocking mechanism 9 includes a first mounting plate 94 and a second mounting plate 95, the needle bar frame 6 has an intermediate connecting gear 61, the first mounting plate is fixed to the rear side of the intermediate connecting gear 61 by a fastener, the second mounting plate 95 is fixed to the other side opposite to the above-mentioned side by a fastener, and the first mounting plate 94 and the second mounting plate 95 are fixed by a reinforcing plate 96, the unlocking mechanism 9 also includes a guide shaft 91 and a mounting base 92, the two ends of the guide shaft 91 are respectively slidably inserted on the first mounting plate 94 and the second mounting plate 95; the mounting base 92 is sleeved on one end of the guide shaft 91 and fixed by a fastener, and of course it can also be fixed on the guide shaft by welding or integral molding. The guide shaft 91 is located at the mounting base 9 A return spring 93 is sleeved between the first mounting plate 94 and the first mounting plate 94. When the unlocking mechanism 9 takes effect, the spring is compressed. After the unlocking is completed, the spring drives the unlocking mechanism 9 to return to its original position. It should be noted that in this embodiment, the guide shaft 91 is slidably inserted on the first mounting plate 94 and the second mounting plate 95, and the mounting base 92 is fixed on the guide shaft 91. However, the guide shaft 91 can also be fixed at both ends on the first mounting plate 94 and the second mounting plate 95, and the mounting base 92 is slidably sleeved on the guide shaft 91 to enable the mounting base 92 to move.

[0048] The locking structure 8 is arranged on the mounting base 92, and a transmission member 23-A is arranged on the presser foot rod 23 for an external driving source. The matching structure 7 is arranged on the side of the transmission member 23-A, and the matching structure 7 and the locking structure 8 have a second contact surface 71 and a first contact surface 81 that contact each other, and the second contact surface 71 and the second contact surface 81 are arranged to be inclined relative to the axial direction of the presser foot rod 23. The principle of the inclined arrangement is that when the matching structure 7 is subjected to a vertical downward force given by the driving source, the matching structure 7 is subjected to a vertical downward driving force, and the locking structure is The supporting force given is perpendicular to the action surface. At this time, the vertical downward driving force is decomposed into a downward force perpendicular to the action surface, which offsets the supporting force, and a downward force parallel to the action surface, which is used to enable the matching structure 7 to slide down along the action surface. At this time, the locking structure 8 is subjected to the pressure perpendicular to the action surface given by the matching structure, and the vertical upward supporting force given by the guide shaft 91. The vertical pressure is decomposed into a vertical downward force that offsets the supporting force, and a horizontal force, which is used to enable the locking structure 8 to move horizontally to release the locking effect on the matching structure 7.

[0049] Taking the direction of the forward movement of the mating structure as a reference, the distal end of the first contact surface 81 is connected to a third contact surface 82 which is also inclined, and the inclination direction of the third contact surface 82 is opposite to that of the first contact surface 81. The purpose of setting the inclined third contact surface is to enable the presser foot that has completed the work to push the locking structure 8 away again under the drive of the driving source and return to its original position when it is in the non-working state. The principle of its action is the same as that of the first contact surface 81 and the second contact surface 71. The use of such a structure can reduce the number of new disengagement mechanisms, thereby reducing the number of additional motors, which can reduce manufacturing costs while simplifying the structure and reducing equipment space.

[0050] A guide surface is also provided on the mounting base 92, and the guide surface is in contact with the side surface of the matching structure 7 for guiding the slight shaking of the matching structure 7 along the axial direction perpendicular to the presser foot rod 23, so that the presser foot can run more smoothly. Of course, the guide surface may not be provided, and the present embodiment can still achieve its purpose of the invention; the mounting base 92 also has a protrusion 922 on the side facing the second mounting plate 95, and the area of ​​the protrusion 922 is smaller than the area of ​​the side surface of the mounting base 92. The purpose of such a setting is to alleviate the impact force of the unlocking mechanism 9 on the second mounting plate when it is reset after taking effect.

[0051] This is a relative position diagram of the matching structure when the presser foot is in a non-working state. When the presser foot is in a non-working state, the transmission member 23-A is not subjected to the force exerted by the driving source, the matching structure 7 is blocked above by the locking structure 8, and the reset spring is in a normal state. At this time, the presser foot is maintained on the needle rack. Even if a slight vibration of the frame during actual production causes a certain degree of shaking of the moving mechanism forward and backward, it is not enough to allow the matching structure 7 to resist the blocking effect of the locking structure 8. Therefore, it can effectively ensure that the presser foot always remains on the needle bar rack when it is not in a working state, avoiding affecting the working presser foot and effectively improving the quality of embroidery.

[0052] This is a relative position diagram of the matching structure when the presser foot is about to leave the locking state. When the presser foot needs to enter the working state, the embroidery machine applies a force to the transmission member 23-A to drive it to move downward. At this time, the matching structure 7 is subjected to a downward force because the first contact surface 81 and the second contact surface 71 of the matching structure 7 and the locking structure 8 that interact with each other are inclined surfaces. Under the action of the driving force decomposition force, the matching structure 7 applies a downward force on the vertical contact surface to the locking structure 8, and the vertical clamping force is decomposed into a vertical downward force and a horizontal force. After the vertical force is offset by the supporting force given by the guide shaft 91, the entire locking structure is only subjected to the horizontal force, and the mounting base 92 provided with the locking structure 8 is fixed on the unlocking mechanism 9. Therefore, the unlocking mechanism 9 drives the entire mounting base 92 to move horizontally under the drive of the horizontal force, so that the locking structure 8 and the matching structure 7 are relatively displaced, thereby releasing the blocking effect on the matching structure 7. At this time, the reset spring is in a compressed state. When the matching structure 7 is completely separated from the locking structure 8, the matching structure 7 runs to the bottom of the locking structure 8, the reset spring returns to a normal state, and the unlocking mechanism 9 returns to its original position.

[0053] The relative position diagram of the matching structure when the presser foot returns to the non-working state after completing the work. When the presser foot completes the embroidery work, the embroidery machine drives the transmission member 23-A again, so that the matching structure 7 is subjected to a vertical upward force. The third contact surface 82 is set as a long inclined surface. Similar to the presser foot unlocking structure, the matching structure 7 can be reversed to push the locking structure 8 open again and reset to the original position of the non-working state. The unlocking mechanism 9 is reset again under the action of the reset spring to realize its blocking effect, so that the presser foot is kept above the needle bar frame again.

[0054] Finally, it should be noted that the above implementation cases are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned implementation cases, those skilled in the art should understand that they can still modify the technical solutions recorded in the aforementioned implementation cases, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the implementation cases of the present invention.

Claims

1. A needle bar frame of a high-speed embroidery machine, characterized in that: It includes a needle bar frame, a needle bar installed on the needle bar frame and a presser foot matched therewith, the presser foot includes a presser foot rod, a presser foot structure connected to the bottom end of the presser foot rod, a positioning block is fixedly sleeved on the presser foot rod, and a C-shaped positioning portion corresponding to a hoop sleeve on the needle bar is formed on one side of the positioning block, the presser foot structure is provided with a first wire clamping structure and a second wire clamping structure, and a hook knife is passed between the two, the first wire clamping structure can move relative to the second wire clamping structure and can be reset, and the first wire clamping structure is in contact with the second wire clamping structure when it is in the reset position, the presser foot rod is provided with a matching structure, the needle bar frame is provided with a locking structure for blocking the forward movement of the matching structure, and the needle bar frame is provided with an unlocking mechanism that can cause the locking structure and the matching structure to undergo relative displacement to release the locking structure The blocking effect of the matching structure is that the first thread clamping structure is a flat plate structure, and the second thread clamping structure is a columnar structure. The first thread clamping structure has a middle part in contact with the side of the second thread clamping structure and a side part connecting the two ends of the middle part. The two side parts are inclined relative to the middle part in a direction away from the second thread clamping structure. The presser foot includes a presser foot rod, a presser foot cover wrapped and fixed at the bottom end of the presser foot rod, a cloth pressing end for pressing cloth and allowing the embroidery needle of the needle bar to pass through, and a presser foot bracket connecting the presser foot cover and the cloth pressing end. The presser foot cover has two spaced-apart lugs and a connecting shaft is connected between the two lugs. A side part of the first thread clamping structure is connected to the connecting shaft, and the side part of the first thread clamping structure has a ring sleeved on the connecting shaft.

2. The needle bar frame of the high-speed embroidery machine according to claim 1, characterized in that: A side portion of the first wire clamping structure has a ring fixedly sleeved on the connecting shaft, and the first wire clamping structure is made of elastic material.

3. The needle bar frame of the high-speed embroidery machine according to claim 1, characterized in that: One side of the first wire clamping structure has a ring slidably sleeved on the connecting shaft, the connecting shaft sleeve is provided with a torsion spring, the ring is provided with a notch groove, and the portion of the connecting shaft corresponding to the notch groove is sleeved with a torsion spring, and the two ends of the torsion spring respectively abut against the first wire clamping structure and the pressure foot.

4. The needle bar frame of the high-speed embroidery machine according to claim 1, characterized in that: The locking structure and the matching structure respectively have a first contact surface and a second contact surface that contact each other, and the first contact surface and the second contact surface are arranged obliquely relative to the axial direction of the presser foot rod.

5. The needle bar frame of the high-speed embroidery machine according to claim 4, characterized in that: The unlocking mechanism includes a guide shaft, a mounting base provided with the locking structure, and a first mounting plate fixed to the needle bar frame, one end of the guide shaft is fixed to the first mounting plate, the mounting base is slidably sleeved on the guide shaft and moves along its axial direction, or the guide shaft is slidably inserted in the first mounting plate and can move along its axial direction, the mounting base is fixed on the guide shaft, and a section of the guide shaft located between the mounting base and the first mounting plate is sleeved with a return spring.

6. The needle bar frame of the high-speed embroidery machine according to claim 5, characterized in that: With reference to the positive moving direction of the matching structure, the distal end of the first contact surface is connected to a third contact surface, and the third contact surface is inclined relative to the axial direction of the presser foot rod and has an inclination direction opposite to that of the first contact surface.

7. The needle bar frame of the high-speed embroidery machine according to claim 6, characterized in that: The unlocking mechanism also includes a second mounting plate fixed to the needle bar frame, and the other end of the guide shaft is fixedly or slidably inserted in the second mounting plate.

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