A thread changing mechanism for an embroidery machine

Abstract

This invention relates to the field of embroidery machine technology and provides an embroidery machine thread changing mechanism. The mechanism is mounted on the embroidery machine body and includes a base frame and a thread box. The base frame is aligned with the needle arrangement of the embroidery machine and can be moved directly below the needles for thread changing. The base frame has a sliding base with adjustable position. The thread box is mounted on the sliding base via a mounting component. The thread box contains a rotatable thread spool with a traction thread wound on it. The thread box has a thread passage hole, and the movable end of the traction thread passes through the hole and is connected to a connecting tube for inserting embroidery thread. The connecting tube is secured with a tie to connect the embroidery thread to the traction thread. Thread changing is achieved by alternating traction between the traction thread and the old and new threads, eliminating the need to cut the thread, avoiding thread waste, and ensuring a secure and stable connection between the traction thread and the embroidery thread, thus guaranteeing a high success rate for thread changing.

Description

Technical Field

[0001] This invention relates to the field of embroidery machine technology, specifically to an embroidery machine thread changing mechanism. Background Technology

[0002] With the rapid development of the textile industry and technological progress, embroidery technology has transformed from traditional hand embroidery to large-scale, highly efficient, automated production using computerized embroidery machines. In the process of using embroidery machines, thread changing remains a crucial step that directly impacts production efficiency.

[0003] Currently, the thread changing operation on embroidery machines still uses the traditional method: first, the new thread is knotted with the old thread, then the old thread is cut, and then the new thread is guided along the corresponding path by pulling the old thread from the needle side. Once the new thread is pulled to the needle, the knot between the new and old threads is cut, thus completing the entire thread changing process. Because it is necessary to cut the new and old threads, it results in thread waste. In addition, the knotting operation of the new and old threads requires a high level of skill. If the knot is not secure, the new and old threads will separate during the pulling and guiding process, resulting in thread changing failure.

[0004] Therefore, the present invention proposes a thread-changing mechanism for an embroidery machine to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to provide a thread-changing mechanism for an embroidery machine to solve the above-mentioned problems.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] An embroidery machine thread changing mechanism is provided on the embroidery machine body. The thread changing mechanism includes a base frame and a thread box. The base frame is aligned with the needle arrangement of the embroidery machine and can be moved directly below the needle for thread changing. The base frame has a slide seat that can be slidably adjusted. The thread box is mounted on the slide seat via a mounting component. The thread box contains a rotatable thread spool with a traction thread wound on it. The thread box has a thread passage hole. The movable end of the traction thread passes through the thread passage hole and is provided with a connecting tube for inserting embroidery thread. The connecting tube is provided with a tie that can tighten the connecting tube to connect the embroidery thread with the traction thread.

[0008] In one alternative: the mounting component is provided with a drive component for driving the reel to rotate.

[0009] In one alternative embodiment: the thread changing mechanism further includes two arc-shaped support members connected to the embroidery machine body. Each of the two support members is provided with a through groove. The base frame is located between the two support members, and both ends of the base frame are provided with columns that are adapted to the through grooves and pass through the through grooves. A pressure sleeve is fitted on the rod section of the column that passes through the through groove, and a limiting block is provided at the end of the column away from the base frame. A compression spring is fitted on the rod section of the column located between the limiting block and the pressure sleeve. An anti-slip pad is provided on the side of the pressure sleeve that abuts against the support member.

[0010] In one alternative: the base frame is provided with a magnetic inner frame, and the slide is made of ferrous material and can be slidably locked in the magnetic inner frame.

[0011] In one alternative: the binding wire is looped around the connecting tubing, and a tensioning element is provided on one side of the slide. The tensioning element has two thread holes, and the two ends of the binding wire pass through the two thread holes respectively. Adhesive dots that closely abut against the binding wire are distributed on the inner walls of the two thread holes.

[0012] Both ends of the binding thread are equipped with limiting knots.

[0013] In one alternative: the connecting tubing is provided with a lug, and the binding wire passes through the lug.

[0014] In one alternative: the inner wall of the connecting tube is evenly distributed with anti-loosening protrusions to prevent the embroidery thread from falling off.

[0015] Compared with the prior art, the beneficial effects of the embodiments of the present invention are as follows:

[0016] When changing the thread, first move the base frame directly below the needle and adjust the slide position so that the thread box is below the needle to be replaced. Then, insert the end of the old thread into the connecting tube and tie it tightly, connecting the old thread to the traction line. Next, pull the old thread from the spool holder to bring the connecting tube to the spool holder. During this process, the spool rotates to release the traction line. Then, loosen the tie to allow the old thread to detach from the connecting tube. Next, insert the end of the new thread into the connecting tube and tie it tightly. At this point, the new thread is connected to the traction line. By rotating the spool to wind up the traction line, pull the new thread to the needle. Finally, loosen the tie to allow the new thread to detach from the connecting tube. Thread the new thread through the eye of the corresponding needle. This completes the thread change without cutting the embroidery thread, avoiding waste. The connection between the traction line and the embroidery thread is firm and stable, ensuring a high success rate for thread changing.

[0017] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0018] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. Furthermore, these drawings and textual descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concepts of this application to those skilled in the art through reference to specific embodiments.

[0019] Figure 1 This is a schematic diagram of the structure of the present invention.

[0020] Figure 2 for Figure 1 Enlarged view of point A in the middle.

[0021] Figure 3 This is a front view of the connecting tubing and the binding wire in this invention.

[0022] Figure 4 for Figure 1 Enlarged view of section B in the middle.

[0023] Figure 5 This is a three-dimensional schematic diagram of the carrier component in this invention.

[0024] Figure 6 This is a schematic diagram showing the arrangement of the base frame, slide block, and magnetic inner frame in this invention.

[0025] Figure 7 This is a schematic diagram showing the arrangement of the connecting tubing, binding wire, and tensioning components in this invention.

[0026] Figure 8 This is a front view of the tensioning component in this invention.

[0027] Figure label annotations: 1-Base frame, 2-Bearing component, 3-Wire box, 4-Wire reel, 5-Traction wire, 6-Drive component, 7-Slide seat, 8-Mounting component, 9-Through groove, 10-Column, 11-Limiting block, 12-Pressure sleeve, 13-Anti-slip pad, 14-Compression spring, 15-Magnetic inner frame, 16-Wire hole, 17-Connecting hose, 18-Wire tie, 19-Tightening component, 20-Leg, 21-Limiting knot, 22-Anti-detachment protrusion, 23-Wire hole, 24-Glue dot. Detailed Implementation

[0028] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0029] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0030] Please see Figures 1-3 An embroidery machine thread changing mechanism is provided on the embroidery machine body. The thread changing mechanism includes a base frame 1 and a thread box 3. The base frame 1 is aligned with the needle arrangement of the embroidery machine and can be moved directly below the needle for thread changing. The base frame 1 has a slide seat 7 that can be slidably adjusted. The thread box 3 is mounted on the slide seat 7 via a mounting member 8. The thread box 3 has a rotatable thread spool 4 with a traction thread 5 wound on it. The thread box 3 has a thread hole 16, and the movable end of the traction thread 5 passes through the thread hole 16 and is provided with a connecting tube 17 for inserting embroidery thread. The connecting tube 17 has a tie 18 that can tighten the connecting tube 17 to connect the embroidery thread with the traction thread 5.

[0031] When a new thread needs to be replaced, first move the base frame 1 directly below the needle and adjust the position of the slide block 7 so that the thread box 3 is below the needle to be replaced. Then, insert the end of the old thread into the connecting tube 17 and tighten the binding wire 18 to connect the old thread to the traction wire 5. Next, pull the old thread from the spool bracket to bring the connecting tube 17 to the spool bracket. During this process, the thread reel 4 rotates to release the traction wire 5. Then, loosen the binding wire 18 to detach the old thread from the connecting tube 17. Finally, insert the end of the new thread into the connecting tube 17 and tighten the binding wire. 18. At this point, the new thread is connected to the traction thread 5. By rotating the thread reel 4 to wind up the traction thread 5, the new thread is pulled to the needle tip. Finally, the binding thread 18 is released to allow the new thread to detach from the connecting tube 17. The new thread is then passed through the eye of the corresponding embroidery needle. This completes the thread change without cutting the embroidery thread, thus avoiding thread waste. Furthermore, the traction thread 5 is firmly and stably connected to the embroidery thread, ensuring a high success rate for the thread change operation. It should be noted that the connecting tube 17 is a soft tube that can adaptably deform during the thread guiding process to smoothly pass through the embroidery thread path.

[0032] Furthermore, the mounting component 8 is provided with a driving component 6 for driving the spool 4 to rotate (the driving component 6 is a rotating device such as a motor or a geared motor in the prior art, which will not be described in detail here). The spool 4 is driven to rotate by the driving component 6 to release / rewind the traction line 5.

[0033] Furthermore, the diameter of the wire passage hole 16 is smaller than the outer diameter of the connecting tube 17 to prevent the connecting tube 17 from entering the junction box 3.

[0034] Please see Figure 1 , Figures 4-6 In one embodiment of the present invention, the thread changing mechanism further includes two arc-shaped support members 2 connected to the embroidery machine body. Each of the two support members 2 is provided with a through groove 9. The base frame 1 is located between the two support members 2, and both ends of the base frame 1 are provided with columns 10 that are adapted to and pass through the through groove 9. A pressure sleeve 12 is sleeved on the rod segment of the column 10 that passes through the through groove 9, and a limiting block 11 is provided at the end of the column 10 away from the base frame 1. A compression spring 14 is sleeved on the rod segment of the column 10 located between the limiting block 11 and the pressure sleeve 12. An anti-slip pad 13 is provided on the side of the pressure sleeve 12 that abuts against the support member 2.

[0035] The base frame 1 is provided with a magnetic inner frame 15, and the slide block 7 is made of iron material and can be slidably locked in the magnetic inner frame 15.

[0036] In this embodiment, the two support members 2 are located at the rear of the embroidery machine head. Normally, the base frame 1 is located at the rear of the embroidery machine head and will not affect the normal embroidery operation. When changing threads, the operator holds the two pressure sleeves 12 with both hands and moves them away from the base frame 1 so that the two pressure sleeves 12 are no longer tightly pressed against the support members 2. Maintaining this state, the base frame 1 is moved down along the through groove 9 into place, that is, the base frame 1 is moved to the position directly below the needle part. At this time, the two pressure sleeves 12 are released, and the two pressure sleeves 12 return to being tightly pressed against the support members 2 under the action of the compression spring 14, thereby positioning the base frame 1. After adjusting the position of the thread box 3 by moving the slide 7, the slide 7 is positioned by the magnetic attraction of the magnetic inner frame 15 (the magnetic inner frame 15 attracts the slide 7 with a force that meets the positioning force of the slide 7 during thread changing operation, and the slide 7 can be moved). It is simple and convenient.

[0037] Please see Figure 3 , Figure 7 and Figure 8 In one embodiment of the present invention, the binding wire 18 is looped on the connecting tubing 17, and a tensioning member 19 is provided on one side of the slide block 7. The tensioning member 19 is provided with two threading holes 23. The two ends of the binding wire 18 pass through the two threading holes 23 respectively. Adhesive dots 24 that closely abut against the binding wire 18 are distributed on the inner wall of the two threading holes 23.

[0038] Both ends of the binding wire 18 are provided with limiting knots 21.

[0039] In this embodiment, the binding thread 18 is fixed by the friction generated by the tight contact between the glue point 24 and the binding thread 18 (it should be noted that this friction is sufficient to tighten the connecting tube 17, and the operator can overcome this friction by manually pulling the binding thread 18 or the tensioning element 19). When it is necessary to tighten the connecting tube 17, the operator pinches the end of the binding thread 18 with one hand and pinches the tensioning element 19 with the other hand and pulls it towards the connecting tube 17 to tighten the connecting tube 17, thereby connecting the embroidery thread with the traction thread 5. When it is necessary to loosen the connecting tube 17, the operator pinches the part of the binding thread 18 that is looped on the connecting tube 17 with one hand and pinches the tensioning element 19 with the other hand and pulls it away from the connecting tube 17 to loosen the connecting tube 17, so that the connecting tube 17 is separated from the embroidery thread.

[0040] The purpose of setting the limit knot 21 is to prevent the tensioning element 19 from being pulled off, while allowing the operator to pinch the end of the wire 18 tightly.

[0041] Furthermore, in this embodiment, the connecting tubing 17 is provided with a lug 20, and the binding wire 18 passes through the lug 20. The lug 20 connects the binding wire 18 to the connecting tubing 17, preventing the binding wire 18 from detaching from the connecting tubing 17 and being lost.

[0042] Furthermore, in this embodiment, the inner wall of the connecting tube 17 is evenly distributed with anti-loosening protrusions 22 to prevent the embroidery thread from falling off. When the binding thread 18 is tightened, the anti-loosening protrusions 22 are in close contact with the end of the inserted embroidery thread, which further fixes the embroidery thread.

[0043] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A thread-changing mechanism for an embroidery machine, characterized in that, The thread changing mechanism is mounted on the body of the embroidery machine and includes a base frame (1) and a thread box (3). The base frame (1) is aligned with the needle arrangement of the embroidery machine and can be moved directly below the needle for thread changing. The base frame (1) has a sliding seat (7) that can be adjusted in position. The thread box (3) is mounted on the sliding seat (7) via a mounting piece (8). The thread box (3) has a rotatable thread spool (4) with a traction thread (5) wound on it. The thread box (3) has a thread hole (16) with the movable end of the traction thread (5) passing through the thread hole (16) and a connecting tube (17) for inserting the embroidery thread. The connecting tube (17) has a binding thread (18) that can tighten the connecting tube (17) to connect the embroidery thread to the traction thread (5).

2. The embroidery machine thread changing mechanism according to claim 1, characterized in that, The mounting component (8) is provided with a drive component (6) for driving the spool (4) to rotate.

3. The embroidery machine thread changing mechanism according to claim 1, characterized in that, The thread changing mechanism also includes two arc-shaped support members (2) connected to the embroidery machine body. Each of the two support members (2) is provided with a through groove (9). The base frame (1) is located between the two support members (2), and both ends of the base frame (1) are provided with columns (10) that are adapted to the through groove (9) and pass through the through groove (9). A pressure sleeve (12) is provided on the rod section of the column (10) that passes through the through groove (9), and a limiting block (11) is provided at the end of the column (10) away from the base frame (1). A compression spring (14) is provided on the rod section of the column (10) located between the limiting block (11) and the pressure sleeve (12). An anti-slip pad (13) is provided on the side of the pressure sleeve (12) that abuts against the support member (2).

4. The embroidery machine thread changing mechanism according to claim 1, characterized in that, The base frame (1) is provided with a magnetic inner frame (15), and the slide (7) is made of iron material and can be slidably locked in the magnetic inner frame (15).

5. The embroidery machine thread changing mechanism according to claim 1, characterized in that, The binding wire (18) is looped around the connecting tube (17), and a tensioning element (19) is provided on one side of the slide (7). The tensioning element (19) has two thread holes (23). The two ends of the binding wire (18) pass through the two thread holes (23) respectively. The inner walls of the two thread holes (23) are distributed with adhesive dots (24) that closely abut against the binding wire (18). Both ends of the binding wire (18) are provided with limiting knots (21).

6. The embroidery machine thread changing mechanism according to claim 5, characterized in that, The connecting tubing (17) is provided with a lug (20), and the binding wire (18) passes through the lug (20).

7. The embroidery machine thread changing mechanism according to claim 1, characterized in that, The inner wall of the connecting tube (17) is evenly distributed with anti-loosening protrusions (22) to prevent the embroidery thread from falling off.

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