Sewing machine right thread hook, thread guide mechanism, sewing machine and right thread hook thread path

Abstract

This invention provides a right thread hook for a sewing machine, a thread guide mechanism, a sewing machine, and a thread trajectory for the right thread hook. It includes a fixed part and a guide part. The guide part is slidably connected to the fixed part, and the thread passes through the guide part. The guide part can slide along the fixed part with the thread, keeping the thread in a low-tension position. In this invention, the guide part is slidably connected to the fixed part, thus ensuring that the thread-carrying range of the thread guide includes the movement range of the large thread clamp surface and the thread take-up lever's thread hole. During sewing, the guide part slides along the fixed part with the thread, keeping the thread in a low-tension position at all times, reducing tension fluctuations, and preventing thread slippage and breakage.

Description

Technical Field

[0001] This invention relates to the field of sewing machine equipment technology, and in particular to a right thread hook for a sewing machine, a thread guide mechanism, a sewing machine, and the thread trajectory of the right thread hook. Background Technology

[0002] Existing sewing machines typically control the tension of the top thread by adjusting the clamping force of the large thread tensioner, and determine the amount of thread to feed by adjusting the left and right position of the right thread hook. In sewing processes involving thicker or denser fabrics, the friction at the needle hole is greater. If the clamping force of the large thread tensioner is insufficient, the top thread will slip during take-up. If the clamping force of the large thread tensioner is set too high, when the take-up mechanism tightens the top thread and needs to pull it out from the large thread tensioner, the internal tension of the top thread stretches to compensate for the required amount of thread. At this time, the more thread guides between the large thread tensioner and the needle, the more complex the thread path, the more bends and turns, and the more times the tension changes. The larger the bend angle, the greater the amplitude of tension changes, leading to problems such as skipped stitches and thread breakage.

[0003] In existing technology, the right thread hook is mainly used to adjust the thread supply before sewing begins, and is already fixed to the sewing machine head at the start of sewing. During sewing, the top thread passes through the following sequence: thread holder - three-eye thread hook - small thread clamp - large thread clamp - slow thread hook - right thread hook - take-up lever - left thread hook - electronic thread clamp - needle bar lower bushing thread hook - needle bar thread hook - needle. The plane containing the top thread segments of "large thread clamp - slow thread hook" and "slow thread hook - right thread hook" is not the same as the plane containing the top thread segments of "slow thread hook - right thread hook" and "right thread hook - take-up lever". The larger the spatial angle between the top thread of "large thread clamp - slow thread hook" and the thread clamping surface of the large thread clamp, the worse the stress on the large thread clamp; the larger the spatial angle between the top thread of "slow thread hook - right thread hook" and the top thread of "right thread hook - take-up lever", the greater the variation in thread tension, making problems such as thread slippage and breakage more likely. Summary of the Invention

[0004] In view of the shortcomings of the prior art described above, the purpose of this invention is to provide a sewing machine right thread hook, a thread guide mechanism, a sewing machine, and a right thread hook surface trajectory, which adjusts the angle between the surface of the thread and the thread clamping surface of the large thread clamp at the "large thread clamp - slow thread hook - right thread hook - thread take-up lever", reduces the spatial bending angle of the surface of the thread, improves the stress condition of the large thread clamp, increases the stability of the surface of the thread, and reduces the variation range of the surface tension.

[0005] To achieve the above and other related objectives, the present invention provides a right thread hook for a sewing machine, comprising a fixing part and a guiding part. The guiding part is slidably connected to the fixing part, the top thread is passed through the guiding part, and the guiding part can slide along the top thread on the fixing part, so that the top thread is in a low tension position.

[0006] Preferably, the side of the fixing part is provided with a sliding groove, and the side of the guide part is provided with a slider, which moves along the extension direction of the sliding groove.

[0007] Preferably, the guide portion has a through hole or through groove, and the through hole or through groove is a wire passage portion; the surface line passes through the through hole or through groove.

[0008] To achieve the above or other objectives, the present invention also discloses a thread guide mechanism, which is installed on the sewing machine head; the thread guide mechanism includes a large thread clamp, a thread take-up lever, a thread easer hook, and the aforementioned right thread hook; the large thread clamp is provided with two opposing thread clamping plates, forming a large thread clamping surface between the two clamping plates, and the thread take-up lever is provided with a thread take-up lever thread pass-through hole; the top thread passes through the thread clamping surface of the large thread clamp, passes through the thread easer hook and the right thread hook, enters the thread take-up lever, and exits through the thread take-up lever thread pass-through hole.

[0009] Preferably, the fixing part has a fixing part connecting groove, and the sewing machine head has a right hook connecting hole. The fixing part connecting groove is aligned with the right hook connecting hole, and fasteners are inserted through both of them.

[0010] Preferably, the extending direction of the fixing part is the same as the radial direction of the clamping piece, and the extending direction of the guiding part is the same as the axial direction of the clamping piece.

[0011] To achieve the above or other objectives, the present invention also discloses a sewing machine including the above-described thread guiding mechanism.

[0012] To achieve the above or other objectives, the present invention also discloses a right-hand hook thread trajectory using the aforementioned sewing machine; the guide portion is provided with a thread guide portion, the thread-carrying range of which includes the movement range of the large thread clamping surface and the thread take-up lever's thread-passing hole; during sewing, when the thread take-up lever keeps the thread taut, the thread is tightly attached to the thread guide portion of the right-hand hook and is in a straight line in real time; the guide portion slides along the thread on the fixed portion, keeping the thread in a low-tension position.

[0013] Preferably, the thread between the large thread clamp and the slow-release hook is the first thread segment, the thread between the slow-release hook and the right thread hook is the second thread segment, and the thread between the right thread hook and the thread pass hole of the take-up lever is the third thread segment; the thread-carrying range of the thread pass includes the movement range of the thread pass hole of the take-up lever, and during sewing, the extension directions of the second and third thread segments are always coincident; the thread-carrying range of the thread pass includes the thread clamping surface of the large thread clamp, and during sewing, the angle between the first thread segment and the thread clamping surface of the large thread clamp changes within a certain range.

[0014] As described above, the sewing machine right thread hook, thread guide mechanism, sewing machine, and right thread hook surface track of the present invention have the following beneficial effects:

[0015] 1. The present invention relates to a sewing machine right thread hook, a thread guide mechanism, a sewing machine, and a right thread hook thread trajectory. The guide part is slidably connected to the fixed part, thereby realizing that the thread carrying range of the thread guide part includes the movement range of the large thread clamping surface and the thread take-up lever thread guide hole. When sewing is performed, the guide part can slide on the fixed part following the thread, so that the thread is always in a low tension position, reducing the range of tension changes and avoiding problems such as thread slippage and thread breakage.

[0016] 2. The sewing machine right thread hook, thread guide mechanism, sewing machine and right thread hook thread trajectory involved in this invention, the guide part can slide on the fixed part following the thread, which can reduce the spatial angle between the first section of thread and the thread clamping surface of the large thread clamp, and between the second section of thread and the third section of thread, improve the stress condition of the large thread clamp, improve the stability of the thread, reduce the tension of the thread, thereby reducing the occurrence of problems such as thread slippage and thread breakage. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the sewing machine head of the sewing machine involved in the present invention;

[0018] Figure 2 This is a schematic diagram of a second connection structure for the right thread hook of a sewing machine according to the present invention.

[0019] Figure 3 This is a schematic diagram of a third connection structure for the right thread hook of a sewing machine according to the present invention.

[0020] Figure 4 This is a schematic diagram of the first connection structure of the right thread hook of the sewing machine involved in the present invention;

[0021] Figure 5 This is a first schematic diagram of the right hook surface trajectory involved in the present invention;

[0022] Figure 6 This is a second schematic diagram of the right hook surface trajectory involved in the present invention;

[0023] Figure 7 This is a third schematic diagram of the right hook surface trajectory involved in the present invention.

[0024] Explanation of reference numerals in the attached figures:

[0025] 1. Sewing machine head; 2. Large thread clamp; 3. Thread catch hook; 4. Right thread hook; 41. Fixing part; 411. Fixing part connecting groove; 42. Guide part; 421. Thread guide part; 422. Bending part; 423. Moving part; 43. Circular part; 5. Thread take-up lever; 61. First section of top thread; 62. Second section of top thread; 63. Third section of top thread; 7. Large thread clamping surface. Detailed Implementation

[0026] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification.

[0027] It should be understood that the structures, proportions, sizes, etc., illustrated in the accompanying drawings of this specification are merely for illustrative purposes to aid those skilled in the art and are not intended to limit the scope of the invention. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of the invention, should still fall within the scope of the technical content disclosed in this invention. Furthermore, the terms such as "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and are not intended to limit the scope of the invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention's implementation.

[0028] This invention provides a right-side thread hook for a sewing machine, which is installed on the sewing machine head 1. For ease of description, the length direction of the sewing machine head 1 is defined as the left-right direction, the width direction as the front-back direction, and the height direction as the up-down direction. Figure 5 As shown, the left and right directions of the paper are the front and back directions, the front and back directions are the left and right directions, and the top and bottom directions are the top and bottom directions.

[0029] like Figures 1-4 As shown, the present invention provides a right thread hook for a sewing machine, including a fixing part 41 and a guide part 42. The guide part 42 is slidably connected to the fixing part 41, the top thread is passed through the guide part 42, and the guide part 42 can slide along the front and back direction on the fixing part 41 following the top thread, so that the top thread is in a low tension position.

[0030] The sewing machine right thread hook of the present invention, when sewing is performed, will cause the top thread to drive the guide part 42 to slide in the front and back direction on the fixed part 41, so that the top thread is always in a low tension position, reducing the range of tension changes and avoiding problems such as thread slippage and thread breakage.

[0031] In this embodiment, the guide portion 42 is slidably disposed on the fixed portion 41, and the specific connection method is as follows:

[0032] First type of connection structure:

[0033] like Figure 4As shown, the guide part 42 is slidably mounted on the fixed part 41. The guide part 42 has a through hole or through groove, which serves as the thread-passing part 421 through which the thread passes. Further, in this connection structure, a sliding groove is formed on the left side of the fixed part 41 along the front-back direction, and a slider is provided on the right side of the guide part 42. The slider moves back and forth in the sliding groove. When the thread swings back and forth under the action of the thread-taking rod 5, the thread will swing back and forth in the through hole or through groove, thereby causing the guide part 42 to slide in the sliding groove. The movement range of the through hole or through groove exceeds the rear boundary of the movement range of the thread-passing hole of the thread-taking rod, and also exceeds the thread-clamping surface 7 of the large thread clamp. In this connection structure, the guide part 42 includes a thread-passing part 421 and a moving part 423.

[0034] In other embodiments, the connection between the guide portion 42 and the fixing portion 41 also includes the following structure:

[0035] The second type of connection structure:

[0036] like Figure 2 As shown, the front end of the guide part 42 is connected to the fixing part 41, and the guide part 42 and the fixing part 41 are connected by a smooth curved surface transition. The rear end of the guide part 42 is provided with an annular part 43, and the annular part 43, the guide part 42, and the fixing part 41 form a closed loop. The right side of the guide part 42 is the thread guide part 421, through which the thread passes and fits against the guide part 42. Compared with the conventional right line hook 4, in this application, the front end of the thread guide part 421 of the guide part 42 remains unchanged, and the rear end of the thread guide part 421 exceeds the rear boundary of the movement range of the thread guide hole of the take-up rod, and also exceeds the thread clamping surface 7 of the large thread clamp.

[0037] The third type of connection structure:

[0038] like Figure 3 As shown, the third connection structure is basically the same as the second connection structure, except that the front end of the guide part 42 in the third connection structure is bent backward to form a bend part 422, which reduces the internal space of the closed loop. Compared with the second connection structure, the wire passage part 421 has a smaller wire-carrying range, which can reduce the random swing amplitude of the surface line on the wire passage part 421 and improve the stability of the surface line.

[0039] To achieve the above-mentioned objectives or other objectives, such as Figure 1 As shown, the present invention also discloses a thread guiding mechanism, which includes a large thread clamp 2, a thread lifting rod 5, a slowing hook 3, and the aforementioned right thread hook 4; the large thread clamp 2 is provided with two opposing thread clamping plates, and a large thread clamping surface 7 is formed between the two thread clamping plates; the thread lifting rod 5 is provided with a thread lifting rod through-hole; the thread passes through the large thread clamping surface 7, passes through the slowing hook 3 and the right thread hook 4, enters the thread lifting rod 5, and exits through the thread lifting rod through-hole of the thread lifting rod 5.

[0040] Preferred, such as Figures 2-4 As shown, the fixing part 41 has a fixing part connecting groove 411, and the sewing machine head 1 has a right thread hook connecting hole. The fixing part connecting groove 411 is aligned with the right thread hook connecting hole, and a fastener passes through both. In this embodiment, the position of the right thread hook 4 can be adjusted through the fixing part connecting groove 411, the right thread hook connecting hole, and the fasteners in both, so that when the top thread passes through the right thread hook 4, it is close to the thread guide part 421 of the right thread hook 4.

[0041] Preferred, such as Figures 1-7 As shown, the extending direction of the fixing part 41 is the same as the radial direction of the clamping piece, and the extending direction of the thread-passing part 421 is the same as the axial direction of the clamping piece. The guide part 42 is slidably connected to the fixing part 41. In this embodiment, the radial direction of the clamping piece is the left-right direction, and the axial direction of the clamping piece is the front-back direction. The thread-taking rod 5 swings back and forth during the lifting and lowering process. The guide part 42 is provided on the left end face of the fixing part 41 and can slide in the front-back direction. When the guide part 42 slides in the front-back direction, it will cover the movement range of the clamping surface 7 of the large clamping device and the thread-passing hole of the thread-taking rod on the thread-taking rod 5.

[0042] To achieve the above or other objectives, the present invention also discloses a sewing machine including the above-described thread guiding mechanism.

[0043] To achieve the above or other objectives, the present invention also discloses a right-hand hook thread trajectory using the aforementioned sewing machine. The guide section 42 is provided with a thread guide section 421, the thread-carrying range of which includes the movement range of the large thread clamping surface 7 and the thread take-up lever's thread pass-through hole. During sewing, when the thread take-up lever 5 keeps the thread taut, the thread is tightly attached to the thread guide section 421 of the right-hand hook 4 and remains in a straight line in real time. The guide section 42 slides along the thread on the fixing section 41, keeping the thread in a low-tension position.

[0044] Preferred, such as Figure 1 , Figures 5-7 As shown, the thread between the large thread clamp 2 and the slow hook 3 is the first thread segment 61. The first thread segment 61 comes out from the thread clamping plate of the large thread clamp 2, passes through the thread take-up spring, and wraps around the slow hook 3. The thread between the slow hook 3 and the right hook 4 is the second thread segment 62. The second thread segment 62 comes out from the slow hook 3 and wraps around the guide part 42 of the right hook 4. The thread between the right hook 4 and the thread take-up rod through the thread hole is the third thread segment 63. The thread-carrying range of the thread-carrying part 421 includes the movement range of the thread take-up rod through the thread hole. During sewing, the extension direction of the second thread segment 62 and the extension direction of the third thread segment 63 are always in a state of coincidence. The thread-carrying range of the thread-carrying part 421 includes the thread clamping surface 7 of the large thread clamp. During sewing, the angle between the first thread segment 61 and the thread clamping surface 7 of the large thread clamp changes within a certain range.

[0045] To better describe the right hook thread trajectory, several right hook thread trajectories during sewing are listed below, based on the different positions of the take-up lever 5 and the thread guide 421 of the right hook 4:

[0046] 1. The thread-passing hole of the thread take-up rod is located on the front side of the thread clamping surface 7 of the large thread clamp;

[0047] 1.1, such as Figure 5 As shown in Figure 1, the thread-passing part 421 of the right hook 4 is located in front of the thread-clamping surface 7 of the large thread clamp. When the top thread passes through the right hook 4 and enters the thread-passing hole of the thread take-up rod, the top thread contacts the rear end of the thread-passing part 421.

[0048] 1.2, such as Figure 5 As shown in Figure 2, the thread-passing part 421 of the right hook 4 includes a large thread clamping surface 7. When the thread passes through the right hook 4 and enters the thread-passing hole of the take-up rod, the thread contacts the middle part of the thread-passing part 421.

[0049] 1.3, such as Figure 5 As shown in Figure 3, the thread-passing part 421 of the right hook 4 includes a large thread clamping surface 7, and the front end of the thread-passing part 421 is flush with the large thread clamping surface 7; when the top thread passes through the right hook 4 and enters the thread-passing hole of the take-up rod, the top thread contacts the front end of the thread-passing part 421.

[0050] 2. The thread-passing hole of the thread-taking rod is located directly above the thread-clamping surface 7 of the large thread clamp;

[0051] 2.1, such as Figure 6 As shown in Figure 1, the thread-passing part 421 of the right hook 4 is located in front of the thread-clamping surface 7 of the large thread clamp. When the top thread passes through the right hook 4 and enters the thread-passing hole of the thread take-up rod, the top thread contacts the rear end of the thread-passing part 421.

[0052] 2.2, such as Figure 6 As shown in Figure 2, the thread-passing part 421 of the right hook 4 includes a large thread clamping surface 7. When the thread passes through the right hook 4 and enters the thread-passing hole of the take-up rod, the thread contacts the middle part of the thread-passing part 421.

[0053] 2.3, such as Figure 6 As shown in Figure 3, the thread-passing part 421 of the right hook 4 is located behind the thread-clamping surface 7 of the large thread clamp. When the top thread passes through the right hook 4 and enters the thread-passing hole of the thread take-up rod, the top thread contacts the front end of the thread-passing part 421.

[0054] 3. The thread-passing hole of the thread-taking rod is located behind the thread-clamping surface 7 of the large thread clamp;

[0055] 3.1, such as Figure 7 As shown in Figure 1, the thread-passing part 421 of the right hook 4 is located in front of the thread-clamping surface 7 of the large thread clamp. When the top thread passes through the right hook 4 and enters the thread-passing hole of the thread take-up rod, the top thread contacts the rear end of the thread-passing part 421.

[0056] 3.2, such as Figure 7 As shown in Figure 2, the thread-passing part 421 of the right hook 4 includes a large thread clamping surface 7, and the rear end of the thread-passing part 421 is flush with the large thread clamping surface 7; when the top thread passes through the right hook 4 and enters the thread-passing hole of the take-up rod, the top thread contacts the rear end of the thread-passing part 421.

[0057] 3.3, such as Figure 7 As shown in Figure 3, the thread-passing part 421 of the right hook 4 includes a large thread clamping surface 7. When the top thread passes through the right hook 4 and enters the thread-passing hole of the take-up rod, the top thread contacts the middle part of the thread-passing part 421.

[0058] From the above nine types of surface trajectories, we can see that:

[0059] When the guide portion 42 of the right hook 4 does not include the large clamping surface 7, when the end (front or rear end) of the guide portion 42 contacts the top thread, as... Figure 5 1. Figure 6 1. Figure 6 3. Figure 7 1; At this time, the spatial angle between the second section 62 and the third section 63 is relatively large, and the tension when the liner is taut is relatively large; the spatial angle between the first section 61 and the clamping surface 7 of the large clamp is relatively large, the force condition of the large clamp 2 is relatively poor, the tension of the liner in the large clamp 2 is relatively unstable, and problems such as liner throwing and liner breakage are prone to occur.

[0060] When the guide portion 42 of the right hook 4 includes the large clamping surface 7 of the line clamp, when the middle part of the guide portion 42 contacts the line, as... Figure 5 2. Figure 6 2. Figure 7 3; At this point, the spatial angle between the second surface line 62 and the third surface line 63 is the smallest, and the tension of the surface line is relatively small.

[0061] When the guide portion 42 of the right line hook 4 includes the large line clamping surface 7, when the end (front or rear end) of the guide portion 42 contacts the top line, as... Figure 5 3. Figure 7 2; At this point, the spatial angle between the first segment 61 and the clamping surface 7 of the large clamp is the smallest, and the force on the large clamp 2 is the best. However, the spatial angle between the second segment 62 and the third segment 63 is relatively small. Figure 6 The situation in .2 is more significant, and the tension of the surface line is greater here.

[0062] Preferred, in Figure 5 2. Figure 6 2. Figure 7 In section .3, the first surface line 61, the second surface line 62, and the third surface line 63 are a straight line without any curves in between. Figure 5 2. Figure 6 2. Figure 7 The situation shown in .3 represents the optimal case for surface tension. Figure 5 1. Figure 6 1. Figure 6 3. Figure 7 In section .1, there are angles between the second segment 62 and the third segment 63, which can easily lead to curved lines or broken lines. Therefore, these issues should be avoided. Figure 5 1. Figure 6 1. Figure 6 3. Figure 7 Case 1.

[0063] However, because the position of the thread take-up lever's thread guide hole constantly changes during the actual thread take-up process of the sewing machine, the thread take-up lever's thread guide hole may include the thread clamping surface 7 of the large thread clamp or be located in front of or behind the thread clamping surface 7. Therefore, the situation where the first section of thread 61 and the thread clamping surface 7 of the large thread clamp are in the same plane during the sewing process is a suboptimal situation. For example... Figure 5 3. Figure 7 2. Compared to Figure 5 2. Figure 6 2. Figure 7 The straight line type shown in Figure 3 also improves the stress situation at the large clamp 2. However, due to the angle between the second section 62 and the third section 63 of the surface line in the figure, the surface line tension is greater than that of the straight line type, making it more suitable for extremely thick materials that are greatly affected by the large clamp 2.

[0064] In this embodiment, in a scenario where the large wire clamp 2 significantly affects extremely thick materials, it is necessary to limit the movement range of the take-up lever 5 to the same side of the wire clamping surface 7 of the large wire clamp, while simultaneously limiting one end of the guide portion 42 of the right hook 4. For example... Figure 5 In section 3, the line take-up lever 5 is set to move in front of the clamping surface 7 of the large clamping device, and the front end of the guide part 42 of the right line hook 4 is flush with the clamping surface 7 of the large clamping device. That is, the line-carrying range of the guide part 42 of the right line hook 4 covers the clamping surface 7 of the large clamping device (the front end or rear end is coplanar with the clamping surface 7 of the large clamping device), but the line-carrying range of the guide part 42 does not include the movement range of the line take-up lever through the line hole.

[0065] Furthermore, the three connection structures between the guide part 42 and the fixing part 41 disclosed in this application ensure that the wire-carrying range of the guide part 42 includes the movement range of the wire-clamping surface 7 of the large wire clamp and the wire-pulling rod through the wire hole on the wire-pulling rod 5. This can effectively reduce the spatial angle between the first section of the wire 61 and the wire-clamping surface 7 of the large wire clamp, and between the second section of the wire 62 and the third section of the wire 63, improve the stress condition of the large wire clamp 2, increase the stability of the wire, reduce the tension of the wire, and thus reduce the occurrence of problems such as wire throwing and wire breakage.

[0066] The present invention relates to a sewing machine right thread hook, a thread guide mechanism, a sewing machine, and a right thread hook thread trajectory. The thread-carrying range of the thread guide 421 in the guide part 42 includes the movement range of the large thread clamping surface 7 and the thread take-up lever thread pass-through hole. When sewing is performed, the guide part 42 can slide on the fixed part 41 following the thread, so that the thread is always in a low-tension position, reducing the tension variation, reducing the spatial angle between the first section of thread 61 and the large thread clamping surface 7, and between the second section of thread 62 and the third section of thread 63, improving the stress condition of the large thread clamp 2, improving the stability of the thread, reducing the thread tension, and reducing the occurrence of problems such as thread slippage and breakage.

[0067] Therefore, this invention effectively overcomes the various shortcomings of the prior art and has high industrial application value.

[0068] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. A right-hand thread hook for a sewing machine, characterized in that: It includes a fixing part (41) and a guiding part (42). The guiding part (42) is slidably connected to the fixing part (41). The top thread passes through the guiding part (42), and the guiding part (42) slides along the front and back direction on the fixing part (41) with the top thread, so that the top thread is in a low tension position. The width direction of the sewing machine head (1) is the front and back direction. The guiding part (42) has a through hole or through groove, which is a thread guide part (421). The top thread passes through the through hole or through groove. The thread carrying range of the thread guide part (421) includes the movement range of the large thread clamping surface (7) and the thread take-up lever through hole.

2. The right-hand thread hook of a sewing machine according to claim 1, characterized in that: The side of the fixing part (41) is provided with a sliding groove, and the side of the guide part (42) is provided with a slider, which moves along the extension direction of the sliding groove.

3. A thread guiding mechanism, installed on the sewing machine head (1); characterized in that: The thread guide mechanism includes a large thread clamp (2), a thread take-up lever (5), a thread hook (3), and a right thread hook (4) of the sewing machine as described in any one of claims 1-2; the large thread clamp (2) is provided with two opposing thread clamping plates, and a large thread clamping surface (7) is formed between the two thread clamping plates; the thread take-up lever (5) is provided with a thread take-up lever thread pass-through hole; The thread passes through the thread clamping surface (7) of the large thread clamp, passes through the slow thread hook (3) and the right thread hook (4) and enters the thread take-up rod (5), and then passes through the thread take-up rod through the thread hole of the thread take-up rod (5).

4. The wire guiding mechanism according to claim 3, characterized in that: The fixing part (41) is provided with a fixing part connecting groove (411), and the sewing machine head (1) is provided with a right hook connecting hole. The fixing part connecting groove (411) is aligned with the right hook connecting hole, and fasteners are inserted through both.

5. The wire guiding mechanism according to claim 3, characterized in that: The extending direction of the fixing part (41) is the same as the radial direction of the clamping piece, and the extending direction of the guiding part (42) is the same as the axial direction of the clamping piece.

6. A sewing machine, characterized in that: Includes the line-passing mechanism as described in claim 3.

7. A right-hand hook surface trajectory, characterized in that: The sewing machine according to claim 6 is used; the guide part (42) is provided with a thread guide part (421), and the thread guide part (421) has a thread holding range including the movement range of the large thread clamping surface (7) and the thread take-up rod thread guide hole; During the sewing process, when the thread take-up lever (5) brings the thread into a taut state, the thread is close to the thread pass-through part (421) of the right thread hook (4) and is in a straight state in real time; the guide part (42) slides on the fixed part (41) following the thread, so that the thread is in a low tension position.

8. The right hook surface trajectory according to claim 7, characterized in that: The surface line between the large wire clamp (2) and the slow hook (3) is the first surface line (61), the surface line between the slow hook (3) and the right hook (4) is the second surface line (62), and the surface line between the right hook (4) and the wire pass hole of the take-up rod is the third surface line (63). The thread-carrying range of the thread guide (421) includes the movement range of the thread take-up lever thread-carrying hole. During the sewing process, the extension direction of the second section thread (62) and the extension direction of the third section thread (63) are in real time overlapping. The thread-carrying range of the thread guide (421) includes the thread clamping surface (7) of the large thread clamp. During the sewing process, the angle between the first section of thread (61) and the thread clamping surface (7) of the large thread clamp changes within a certain range.

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