Thread trimming mechanism of sewing machine and sewing machine

Abstract

The present invention relates to a thread trimming mechanism of a sewing machine, wherein a cloth passes through at least one side of the thread trimming mechanism, and a side of the cloth with thread ends facing the thread trimming mechanism, and the thread trimming mechanism comprises: an absorbing member, the opening of which faces the cloth and generates suction, the thread ends of the cloth penetrate into the opening under the action of the suction, and the thread ends extend linearly under the action of the suction; and a cutter head assembly, which cuts off the thread ends extending linearly. The suction is generated by the absorbing member, the thread ends on the cloth are sucked into the opening, and the thread ends are cut off by the cutter head assembly, and the cut thread ends are absorbed and collected under the action of the suction, so that the thread ends are trimmed and collected directly during the sewing process of the sewing machine.

Description

Technical Field

[0001] The present invention relates to the technical field of sewing machines, and in particular to a thread trimming head mechanism of a sewing machine and a sewing machine comprising the thread trimming head mechanism. Background Art

[0002] In the process of clothing production, a lot of thread ends will be left after the sewing machine sews the fabric. In order to avoid the thread ends affecting the wearing of the clothing and improve the aesthetics of the clothing, the thread ends on the clothing fabric need to be manually cut off after sewing. However, trimming the thread ends after sewing not only adds a process, but also the efficiency and quality of manual trimming are difficult to guarantee. Therefore, it is necessary to provide a thread end trimming mechanism for a sewing machine to directly trim the thread ends during the sewing process of the fabric. Summary of the invention

[0003] The object of the present invention is to provide a thread trimming head mechanism of a sewing machine, so as to directly trim off thread ends during the sewing process of fabric. According to one aspect of the present invention, a thread trimming head mechanism of a sewing machine is provided, fabric passes through at least one side of the thread trimming head mechanism, and a side of the fabric with thread ends is facing the thread trimming head mechanism, and the thread trimming head mechanism comprises:

[0004] The absorbing member has an opening facing the cloth and generates suction, and the thread ends of the cloth penetrate into the opening under the action of the suction, and the thread ends extend linearly under the action of the suction; the cutter head assembly cuts the thread ends extending linearly.

[0005] More preferably, the receiving member comprises:

[0006] The suction channel is connected to the air compressor to introduce compressed air to generate the suction force, and the opening is formed at one end of the suction channel close to the cloth.

[0007] More preferably, at least a portion of the thread head is located in the absorption channel after probing into the opening, and extends linearly in the absorption channel;

[0008] The cutter head assembly cuts off a portion of the thread ends located in the absorbing channel, or the cutter head assembly cuts off another portion of the thread ends that have not penetrated into the opening.

[0009] More preferably, the absorbing member further comprises:

[0010] An adjusting member is provided at one end of the absorbing channel close to the cloth and abuts against the cloth;

[0011] The direction of the suction force is recorded as a first direction. When viewed along the first direction, the adjusting member covers a portion of the opening, and the degree to which the adjusting member covers the opening is adjustable.

[0012] More preferably, the absorbing member further comprises:

[0013] A connecting portion, located at one end of the absorbing channel close to the cloth, and having a middle portion penetrating through to form the opening;

[0014] The adjusting member is detachably arranged at one end of the connecting portion close to the fabric, and a side of the adjusting member facing away from the fabric is recessed to form a plug-in slot, and a side of the connecting portion close to the fabric is extended to form a convex portion, and when the adjusting member is connected to the connecting portion, the convex portion is inserted into the plug-in slot;

[0015] The depth of the protrusion inserted into the insertion slot is adjustable. When viewed along the first direction, the depth of the protrusion inserted into the insertion slot is negatively correlated with the extent to which the adjusting member covers the opening.

[0016] More preferably, the thread trimming head mechanism further comprises:

[0017] A base, the cutter head assembly is arranged in the base, and the absorbing member is connected to the base; the base comprises:

[0018] A first mounting portion, wherein the cutter head assembly is fixed in the first mounting portion;

[0019] A second mounting portion, the connecting portion of the absorbing member extends into the second mounting portion and is connected to the second mounting portion, the second mounting portion is formed with an adjustment hole, the connecting portion cooperates with the adjustment hole for installation or disassembly, the direction in which the protrusion is inserted into the plug-in slot is recorded as the second direction, and the adjustment hole allows the connecting portion to slide along the second direction.

[0020] More preferably, the cutter head assembly comprises:

[0021] a shearing blade, wherein when viewed along the first direction, the shearing blade covers at least a portion of the opening, and a gap exists between the shearing blade and the adjusting member, and the gap is located within the opening;

[0022] The motor is connected to the shearing blade to drive the shearing blade to cut the thread ends linearly extending in the absorbing channel.

[0023] More preferably, the cutter head assembly further comprises:

[0024] An oil inlet pipe, for introducing lubricating oil and compressed air to spray on the shearing cutter head;

[0025] An oil inlet hole is formed on the first mounting portion, one end of the oil inlet hole is connected to the oil inlet pipe, and the other end is connected to the shearing cutter head.

[0026] More preferably, the absorbing member further comprises:

[0027] an air compressor connected to the suction channel and inputting compressed air into the suction channel to form negative pressure and generate suction;

[0028] The absorption box is connected to the absorption channel. The compressed air input by the air compressor enters the absorption box after passing through the absorption channel. The thread ends cut by the cutter head assembly enter the absorption box along the absorption channel.

[0029] A sewing machine comprises the thread trimming head mechanism of the sewing machine.

[0030] The present invention has the following beneficial effects:

[0031] Suction is generated by the absorbing member to suck the thread ends on the fabric into the opening, and the thread ends are cut off by the cutter head assembly. The cut thread ends are absorbed and collected under the action of suction, thereby directly completing the trimming and collection of the thread ends during the sewing process of the sewing machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0033] Figure 1 It is a schematic diagram of the three-dimensional structure of a sewing machine according to one embodiment of the present invention;

[0034] Figure 2 A schematic diagram of a three-dimensional structure of a thread trimming head mechanism according to an embodiment of the present invention;

[0035] Figure 3 Another three-dimensional structural schematic diagram of the thread trimming head mechanism according to one embodiment of the present invention;

[0036] Figure 4 Based on Figure 3 Schematic diagram of the explosion decomposition structure;

[0037] Figure 5 A side view of a thread trimming head mechanism according to an embodiment of the present invention;

[0038] Figure 6 for Figure 5 Schematic diagram of the local cross-section structure at AA in the middle;

[0039] Figure 7 It is a front view of a thread trimming head mechanism according to one embodiment of the present invention;

[0040] Figure 8 for Figure 7 Schematic diagram of the cross-sectional structure at BB in the middle;

[0041] Fig. 9 It is a schematic diagram of the three-dimensional structure of the adjusting member according to one embodiment of the present invention;

[0042] Fig.10 It is a schematic diagram of the three-dimensional structure of the absorption channel according to one embodiment of the present invention;

[0043] Fig.11 This is a schematic diagram of the installation structure of the adjusting member according to one embodiment of the present invention;

[0044] Fig.12 It is a schematic diagram of the three-dimensional structure of a base according to one embodiment of the present invention;

[0045] Fig.13 This is a schematic diagram of the compressed air circulation principle according to one embodiment of the present invention;

[0046] Fig.14 This is a schematic diagram of the principle of the cutter head assembly cutting the thread head according to one embodiment of the present invention;

[0047] Fig.15 A block diagram of the connection of the absorption channel according to one embodiment of the present invention;

[0048] Fig.16 A block diagram of the connection of the oil inlet pipe according to one embodiment of the present invention;

[0049] Explanation of the accompanying drawings: 100, thread trimming mechanism; 200, cloth; 300, thread; 10, absorption member; 11, opening; 20, cutter head assembly; 12, absorption channel; 400, air compressor; 13, adjustment member; F1, first direction; F2, second direction; 14, connecting part; 131, plug-in slot; 141, raised part; 30, base; 31, first mounting part; 32, second mounting part; 321, adjustment hole; 21, shearing cutter head; 40, gap; 22, motor; 23, oil inlet pipe; 311, oil inlet hole; 500, absorption box; 600, oil tank; 700, sewing machine; 710, guide wheel. DETAILED DESCRIPTION

[0050] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0051] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0052] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which the present invention belongs. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0053] Please refer to Figure 1-Figure 16 , one embodiment of the present invention provides a thread trimming head mechanism 100 of a sewing machine 700 .

[0054] The sewing machine 700 is used for sewing fabric 200, which refers to a simple block of fabric 200, or other fabric products such as clothing, scarves, socks, etc. made of fabric 200, hereinafter referred to as fabric 200. In this embodiment, the sewing machine 700 is an automated intelligent sewing machine 700. It can be understood that the thread trimming mechanism 100 of this embodiment can also be applied to a traditional manual sewing machine 700, which is mainly used to trim the thread ends 300 of the passing fabric 200. It should be noted that the thread trimming mechanism 100 of this embodiment is arranged on the sewing machine 700, and the thread ends 300 are trimmed while the sewing machine 700 is sewing the fabric 200, which should be distinguished from other equipment that trims the thread ends 300 as a separate process after sewing the fabric 200, especially from non-automated equipment that trims the thread ends 300 by manual hand-held method after sewing the fabric 200.

[0055] The thread trimming mechanism 100 is arranged on the sewing machine 700. In this embodiment, the sewing machine 700 is an automatic intelligent sewing machine 700. The cloth 200 is driven by the sewing machine 700 to pass through at least one side of the thread trimming mechanism 100. It is understandable that a similar effect can be achieved by manually moving the cloth 200. In this embodiment, the cloth 200 is driven by the guide wheel 710 rotating on the sewing machine 700 to pass through at least one side of the thread trimming mechanism 100. The at least one side means that the cloth 200 can pass through one side of the thread trimming mechanism 100, so that it is trimmed once by the thread trimming mechanism 100, or it can pass through more than one side of the thread trimming mechanism 100, so that it is trimmed once or more than once by the thread trimming mechanism 100. In this embodiment, only the cloth 200 passing above the thread trimming mechanism 100 and trimming the thread 300 once is taken as an example.

[0056] Specifically, the cloth 200 passes through at least one side of the thread trimming head mechanism 100 , and the side of the cloth 200 with the thread ends 300 faces the thread trimming head mechanism 100 , so that the thread trimming head mechanism 100 can trim the thread ends 300 .

[0057] In this embodiment, the thread trimming head mechanism 100 includes: an absorbing member 10 and a cutter head assembly 20 .

[0058] The opening 11 of the absorbing member 10 faces the cloth 200 and generates suction, so that the thread ends 300 on the cloth 200 penetrate into the opening 11 under the action of the suction, and due to the action of the suction, the thread ends 300 extend linearly under the action of the suction. The linear extension should be understood as the thread ends 300 extending the length direction of the thread ends 300 themselves under the action of the suction, so as to facilitate the cutting head assembly 20 to trim the thread ends 300. It should be noted that the direction of the suction will change with the change of the direction of the airflow, especially after the thread ends 300 enter the opening 11 of the absorbing member 10, they may touch the rigid structure of the absorbing member 10, thereby bending, etc., but it does not contradict the tension of the thread ends 300 along their own length direction. Therefore, linearity cannot be simply understood as a straight line, but should be understood as the tension state of the thread ends 300 under the action of the suction that is easy to be cut by the cutting head assembly 20.

[0059] The cutter head assembly 20 is used to cut the linearly extending thread 300. The cutter head assembly 20 may be a common shearing cutter head in the art that performs relative cutting action by two blades, or a common rotary cutter head in the art that twists the thread 300 by rotating a single blade, or other customized cutter heads that can cut or sever the thread 300.

[0060] In this embodiment, suction is generated by the absorbing member 10 to suck the thread ends 300 on the cloth 200 into the opening 11, and the thread ends 300 are cut off by the cutter head assembly 20. The cut thread ends 300 are absorbed and collected under the action of the suction force, thereby directly completing the trimming and collection of the thread ends 300 during the sewing process of the sewing machine 700.

[0061] In one embodiment, the absorbing member 10 includes an absorbing channel 12 .

[0062] Among them, the opening 11 is formed at one end of the absorption channel 12 close to the cloth 200, and the absorption channel 12 is connected to the air compressor 400 to introduce compressed air to generate suction. After the compressed air enters the absorption channel 12, a low-pressure area will be generated at the entrance, thereby sucking the material at the entrance and spraying it out from the outlet. It should be noted that the entrance and the outlet are relative, and the two are determined by the flow direction of the compressed air. In this embodiment, an opening 11 is formed at one end of the absorption channel 12, and the opening 11 faces the cloth 200. The other end is connected to the absorption box 500 for collecting the cut thread ends 300. The compressed air is introduced from the middle of the absorption channel 12, and the flow direction of the compressed air is configured to make the compressed air flow to the other end of the absorption channel 12, that is, to the absorption box 500, so that the end of the absorption channel 12 close to the cloth 200 becomes a low-pressure area, that is, the entrance, and the end of the absorption channel 12 connected to the absorption box 500 becomes the outlet. Based on this, the opening 11 of the suction channel 12 becomes a low-pressure area relative to the atmospheric pressure, so that the thread head 300 passing through the thread trimming head mechanism 100 is sucked into the opening 11 under the action of the air pressure, that is, under the action of suction, and extends linearly under the action of suction, thereby facilitating the cutter head assembly 20 to cut the thread head 300.

[0063] Specifically, at least a portion of the thread end 300 is located in the absorption channel 12 after probing into the opening 11, and extends linearly in the absorption channel 12. The cutter head assembly 20 cuts off a portion of the thread end 300 located in the absorption channel 12, or the cutter head assembly 20 cuts off another portion of the thread end 300 that has not protruded into the opening 11.

[0064] In one embodiment, the cutter head assembly 20 can be configured to cut off the thread ends 300 located in the receiving channel 12, or can be configured to cut off another part of the thread ends 300 that have not entered the opening 11. The difference between the two is that the length of the thread ends 300 remaining after cutting is different. It should be noted that in this embodiment, since only the cloth 200 passes over the thread trimming head mechanism 100 and the thread ends 300 are trimmed once, the cutter head assembly 20 is configured to cut off another part of the thread ends 300 that have not entered the opening 11, so that the thread ends 300 remaining on the cloth 200 are shorter. However, when the cloth 200 passes through more than one side of the thread trimming head mechanism 100 and is trimmed more than once by the thread trimming head mechanism 100, a scheme of multiple trimming in stages can also be adopted, that is, first cutting off a part of the thread ends 300 located in the receiving channel 12, and then cutting off another part of the thread ends 300 that have not entered the opening 11, so as to improve the efficiency and quality of trimming through multiple staged trimming.

[0065] In one embodiment, in order to facilitate controlling the length of the residual thread ends 300 on the cloth 200 , the absorbing member 10 further includes an adjusting member 13 .

[0066] The adjusting member 13 is detachably arranged at one end of the absorbing channel 12 close to the cloth 200 and abuts against the cloth 200. In this embodiment, the cloth 200 passes over the thread trimming head mechanism 100, the cutter head assembly 20 cuts off the thread ends 300 in the horizontal direction, the adjusting member 13 abuts against the cloth 200, and supports the cloth 200. The thread ends 300 hang down from one end of the cloth 200 close to the adjusting member 13. By adjusting the height of the adjusting member 13, the height of the thread ends 300 relative to the cutter head assembly 20 is controlled, so as to achieve the purpose of controlling the length of the thread ends 300 remaining on the cloth 200.

[0067] Specifically, the direction of the suction force is recorded as the first direction, and when observed along the first direction F1, the adjusting member 13 covers a portion of the opening 11. The size of the opening 11 can be adjusted by adjusting the position of the adjusting member 13 relative to the opening 11, for example, the adjusting member 13 is detachably and movably arranged on the receiving channel 12, and the position of the adjusting member 13 relative to the opening 11 is adjusted by moving the adjusting member 13, so as to change the size of the opening 11; or the adjusting member 13 is detachably and slidably arranged on the receiving channel 12, and the position of the adjusting member 13 relative to the opening 11 is adjusted by sliding the adjusting member 13, so as to change the size of the opening 11; or the adjusting member 13 is detachably and rotatably arranged on the receiving channel 12, and the position of the adjusting member 13 relative to the opening 11 is adjusted by rotating the adjusting member 13, so as to change the size of the opening 11. In this embodiment, the size of the opening 11 is adjusted by disassembling the adjusting member 13, reconfiguring the extent to which the adjusting member 13 covers the opening 11, and then installing and fixing it. The larger the opening 11, the easier it is for the thread 300 to enter the first channel, so that the cutter head assembly 20 can cut the thread 300. In this embodiment, the process of adjusting the size of the opening 11 is also the process of adjusting the height of the adjusting member 13, thereby achieving the purpose of controlling the length of the residual thread 300 on the cloth 200. It should be noted that the size of the opening 11 will also affect the size of the suction force. The larger the opening 11, the smaller the suction force under the same conditions. Therefore, in the actual operation process, the size of the opening 11 is first adjusted to control the length of the residual thread 300 on the cloth 200 and obtain an ideal yield rate, and then the appropriate suction force is adjusted through the air compressor 400 to meet the suction force requirements.

[0068] Specifically, the absorbing member 10 further includes a connecting portion 14 .

[0069] The connecting portion 14 is located at one end of the absorbing channel 12 close to the fabric 200, and the middle part penetrates to form an opening 11. The adjusting member 13 is arranged at one end of the connecting portion 14 close to the fabric 200, and the side of the adjusting member 13 facing away from the fabric 200 is recessed to form a plug-in slot 131, and the side of the connecting portion 14 close to the fabric 200 extends to form a protrusion 141. When the adjusting member 13 is connected to the connecting portion 14, the protrusion 141 is inserted into the plug-in slot 131. The depth of the protrusion 141 inserted into the plug-in slot 131 is adjustable. When observed along the first direction F1, the depth of the protrusion 141 inserted into the plug-in slot 131 is negatively correlated with the degree to which the adjusting member 13 covers the opening 11. The negative correlation should be understood as follows: as the protrusion 141 is inserted deeper into the plug-in slot 131, the degree to which the adjusting member 13 covers the opening 11 is smaller, thereby making the size of the opening 11 larger. It should be noted that the size of the opening 11 here should be understood as the size of the opening 11 through which the thread head 300 can pass to enter the absorbing channel 12, which is different from the size of the opening 11 formed based on the structure of the absorbing channel 12. In order to facilitate the understanding of those skilled in the art, the concept of the gap 40 will be introduced below.

[0070] Specifically, the thread trimming head mechanism 100 further includes: a base 30 , a first mounting portion 31 , and a second mounting portion 32 .

[0071] Among them, the cutter head assembly 20 is arranged in the base 30, and the absorbing member 10 is connected to the base 30; the base 30 includes: a first mounting portion 31 and a second mounting portion 32, the cutter head assembly 20 is fixed in the first mounting portion 31, the connecting portion 14 of the absorbing member 10 extends into the second mounting portion 32 and is connected to the second mounting portion 32, the second mounting portion 32 is formed with an adjustment hole 321, the connecting portion 14 cooperates with the adjustment hole 321 to achieve installation or disassembly, in this embodiment, the bolt is passed through the connecting portion 14 and the adjustment hole 321, and is tightened by a nut, thereby achieving assembly of the connecting portion 14 and the adjustment hole 321. The direction in which the protrusion 141 is inserted into the insertion groove 131 is recorded as the second direction F2, and the adjustment hole 321 allows the connection part 14 to slide along the second direction F2, which is equivalent to configuring the adjustment hole 321 as an oblong hole, wherein an oblong refers to a closed figure formed by dividing a circle into two semicircular arcs through the center of the circle and translating in opposite directions to each other, and connecting the endpoints of the two semicircular arcs with two equal-length parallel lines. The position of the connection part 14 relative to the adjustment hole 321 is adjusted by disassembling and installing, thereby adjusting the height of the adjustment member 13.

[0072] In one embodiment, the cutter head assembly 20 includes: a shearing cutter head 21 , a motor 22 , and an oil inlet pipe 23 .

[0073] Among them, when observed along the first direction F1, the shearing blade 21 covers at least a portion of the opening 11, and there is a gap 40 between the shearing blade 21 and the adjusting member 13, and the gap 40 is located in the opening 11. By adjusting the position of the adjusting member 13 relative to the shearing blade 21, the degree to which the adjusting member 13 covers the opening 11 is adjusted, that is, the size of the gap 40 is adjusted. In this embodiment, by adjusting the height of the adjusting member 13, the size of the gap 40 is adjusted, so as to control the length of the residual thread 300 on the cloth 200.

[0074] Specifically, the motor 22 is connected to the shearing head 21 to drive the shearing head 21 to cut the thread 300 extending linearly in the absorption channel 12. One end of the oil inlet pipe 23 is connected to the base 30, and the other end is connected to the oil tank 600 and the air compressor 400. An oil inlet hole 311 is also formed on the first mounting portion 31. One end of the oil inlet hole 311 is connected to the oil inlet pipe 23, and the other end is connected to the shearing head 21. Lubricating oil and compressed air are introduced through the oil inlet pipe 23 to be sprayed on the shearing head 21, thereby achieving the purpose of lubricating the shearing head 21 and extending the life of the shearing head 21.

[0075] Specifically, the absorbing member 10 further includes: an air compressor 400 and a absorbing box 500 .

[0076] The air compressor 400 is connected to the suction channel 12, and inputs compressed air into the suction channel 12 to form negative pressure and generate suction. The suction box 500 is connected to the suction channel 12, and the compressed air input by the air compressor 400 enters the suction box 500 after passing through the suction channel 12, and the thread ends 300 cut by the cutter head assembly 20 enter the suction box 500 along the suction channel 12.

[0077] An embodiment of the present invention provides a sewing machine 700 , including the thread trimming head mechanism 100 of the sewing machine 700 described above.

[0078] Thereby, suction is generated by the absorbing member 10 to suck the thread ends 300 on the cloth 200 into the opening 11, and the thread ends 300 are cut off by the cutter head assembly 20. The cut thread ends 300 are absorbed and collected under the action of suction, thereby directly completing the trimming and collection of the thread ends 300 during the sewing process of the sewing machine 700.

[0079] The above-mentioned embodiments only express several embodiments of the present invention, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent application. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be based on the attached claims.

Claims

1. A thread trimming mechanism for a sewing machine, characterized in that: The cloth passes through at least one side of the thread trimming head mechanism, and the side of the cloth with thread ends is facing the thread trimming head mechanism, and the thread trimming head mechanism includes: An absorbing member, the opening of which faces the cloth and generates suction, so that the thread ends of the cloth penetrate into the opening under the action of the suction, and the thread ends extend linearly under the action of the suction; The cutter head assembly is used to cut the linearly extending thread head; wherein the absorbing member comprises: A suction channel connected to an air compressor to introduce compressed air to generate the suction force, wherein the opening is formed at one end of the suction channel close to the cloth; An adjusting member is provided at one end of the absorbing channel close to the cloth and abuts against the cloth; A connecting portion, located at one end of the absorbing channel close to the cloth, and having a middle portion penetrating through to form the opening; The adjusting member is detachably arranged at one end of the connecting portion close to the cloth, and a side of the adjusting member facing away from the cloth is recessed to form an insertion groove, and a side of the connecting portion close to the cloth is extended to form a protrusion, and when the adjusting member is connected to the connecting portion, the protrusion is inserted into the insertion groove; the depth of the protrusion inserted into the insertion groove is adjustable, the direction of the suction force is recorded as a first direction, and when observed along the first direction, the depth of the protrusion inserted into the insertion groove is negatively correlated with the degree to which the adjusting member covers the opening.

2. The thread trimming head mechanism of a sewing machine according to claim 1, characterized in that: After at least a portion of the thread head penetrates into the opening, it is located in the absorption channel and extends linearly in the absorption channel; The cutter head assembly cuts off a portion of the thread ends located in the absorbing channel, or the cutter head assembly cuts off another portion of the thread ends that have not penetrated into the opening.

3. The thread trimming mechanism of a sewing machine according to claim 2, characterized in that: When viewed along the first direction, the adjusting member covers a portion of the opening, and the extent to which the adjusting member covers the opening is adjustable.

4. The thread trimming mechanism of a sewing machine according to claim 3, characterized in that: The thread trimming head mechanism also includes: A base, the cutter head assembly is arranged in the base, and the absorbing member is connected to the base; the base comprises: A first mounting portion, wherein the cutter head assembly is fixed in the first mounting portion; A second mounting portion, the connecting portion of the absorbing member extends into the second mounting portion and is connected to the second mounting portion, the second mounting portion is formed with an adjustment hole, the connecting portion cooperates with the adjustment hole for installation or disassembly, the direction in which the protrusion is inserted into the plug-in slot is recorded as the second direction, and the adjustment hole allows the connecting portion to slide along the second direction.

5. The thread trimming mechanism of a sewing machine according to claim 4, characterized in that: The cutter head assembly comprises: a shearing blade, wherein when viewed along the first direction, the shearing blade covers at least a portion of the opening, and a gap exists between the shearing blade and the adjusting member, and the gap is located within the opening; The motor is connected to the shearing blade to drive the shearing blade to cut the thread ends linearly extending in the absorbing channel.

6. The thread trimming mechanism of a sewing machine according to claim 5, characterized in that: The cutter head assembly also includes: An oil inlet pipe, for introducing lubricating oil and compressed air to spray on the shearing cutter head; An oil inlet hole is formed on the first mounting portion, one end of the oil inlet hole is connected to the oil inlet pipe, and the other end is connected to the shearing cutter head.

7. The thread trimming mechanism of a sewing machine according to claim 2, characterized in that: The receiving member further comprises: An air compressor is connected to the suction channel and inputs compressed air into the suction channel to form a negative pressure and generate suction; The absorption box is connected to the absorption channel. The compressed air input by the air compressor enters the absorption box after passing through the absorption channel. The thread ends cut by the cutter head assembly enter the absorption box along the absorption channel.

8. A sewing machine, characterized in that: A thread trimming head mechanism for a sewing machine comprising any one of claims 1-7.

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