Thread trimming sensing mechanism and overlock machine

Abstract

The application relates to the sewing technical field, in particular to a thread cutting induction mechanism and an overlock machine. The thread cutting induction mechanism comprises a fixed cutter assembly, an inductor and a connecting piece. The fixed cutter assembly comprises a fixed cutter. A groove is formed in a side wall on one side of the fixed cutter assembly in the length direction of the fixed cutter assembly. The inductor comprises a first shell and a first induction element. The first shell is formed with a first induction part. The first induction element is installed in the first induction part. The first induction part is inserted into and installed in the groove. The connecting piece is sequentially arranged through the fixed cutter assembly and the first shell in the height direction of the fixed cutter assembly, so as to fixedly connect the fixed cutter assembly and the first shell. When the connecting piece releases the connection between the fixed cutter assembly and the first shell, the inductor can move in the length direction of the fixed cutter assembly and away from the groove. The thread cutting induction mechanism and the overlock machine provided by the application solve the problem that the inductor for identifying special-shaped cloth is inconvenient to disassemble in the related art.

Description

Technical Field

[0001] This application relates to the field of sewing technology, and in particular to a thread-cutting sensing mechanism and an overlock sewing machine. Background Technology

[0002] Currently, overlock sewing machines with automatic thread trimming functions use sensors on the sewing table to identify the fabric's position and execute the thread trimming logic based on the fabric passing through and leaving the sensors. However, the sensors in existing structures cannot recognize some narrow or sharp-angled fabrics, which may result in the fabric being damaged during trimming.

[0003] To overcome this problem and improve the recognition of irregularly shaped fabrics, the relevant technology adopts the method of adding a sensor to the fixed blade area. However, during assembly, the sensor can only be installed from below the fixed blade. If the sensor fails, the entire blade holder structure must be removed to replace the sensor from below, which is complicated. Utility Model Content

[0004] Therefore, it is necessary to provide a thread-cutting sensing mechanism and an overlock sewing machine to solve the problem of inconvenient disassembly and assembly of sensors used to identify irregularly shaped fabrics in related technologies.

[0005] This application provides a thread-cutting sensing mechanism, which includes a fixed blade assembly and a movable blade assembly. The movable blade assembly is movably mounted on the fixed blade assembly. The fixed blade assembly includes a fixed blade, and the movable blade assembly includes a movable blade. The movable blade can engage with the fixed blade to cut thread ends on the fabric. A groove is formed in the sidewall of the fixed blade assembly along its length direction, and the groove extends to both ends of the fixed blade along its height direction. The thread-cutting sensing mechanism also includes a sensor and a connector. The sensor is located below the fixed blade assembly and includes a first housing and a first sensing element. The first housing forms a first sensing part, and the first sensing element is installed in the first sensing part, which is inserted into and installed in the groove. The connector passes through the fixed blade assembly and the first housing sequentially along the height direction of the fixed blade assembly to fix the fixed blade assembly and the first housing. When the connector disconnects the fixed blade assembly and the first housing, the sensor can move away from the groove along the length direction of the fixed blade assembly.

[0006] In one embodiment, one side of the first sensing part along the length direction of the fixed blade assembly is flush with the plane where the groove opening is located; and / or, the upper surface of the first sensing part is flush with the upper surface of the fixed blade.

[0007] In one embodiment, the first housing further includes a second sensing portion disposed on one side of the fixed blade along the width direction of the fixed blade assembly, and the wire cutting sensing mechanism further includes a second sensing element mounted on the second sensing portion.

[0008] In one embodiment, the fixed blade assembly further includes a blade assembly fixing seat and a sewing material baffle, the sewing material baffle being mounted on the blade assembly fixing seat; the first housing extends to the lower part of the sewing material baffle, and the first housing has a first connecting hole, the sewing material baffle has a second connecting hole, and the connector includes a first fastener, the first fastener passing through and connecting the first connecting hole and the second connecting hole.

[0009] In one embodiment, the first housing has a first mounting hole, the fixed blade has a second mounting hole, and the connector further includes a second fastener, which passes through and connects the first mounting hole and the second mounting hole.

[0010] In one embodiment, the fixed blade assembly further includes a blade assembly fixing seat, which includes a first fixing plate and a second fixing plate. The fixed blade is mounted above the first fixing plate, and the second fixing plate is connected to the first fixing plate and is set at an angle to the first fixing plate. The first fixing plate has a notch recessed on one side wall along the length direction of the fixed blade assembly. The notch corresponds to the groove and extends along the width direction of the fixed blade assembly. At least a portion of the first housing is installed in the notch.

[0011] In one embodiment, the wire-cutting sensing mechanism further includes a pressure foot safety switch, which includes a second housing and a switch body. The second housing is connected to the fixed blade assembly, and the switch body is installed inside the second housing.

[0012] In one embodiment, the wire-cutting sensing mechanism further includes a third sensing element, the second housing having a third sensing portion, and the third sensing element being mounted on the third sensing portion; wherein the third sensing element is correspondingly disposed and sensingly engaged with the first sensing element.

[0013] In one embodiment, a portion of the second housing is inclined upward to form the third sensing portion; or, a portion of the second housing extends directly above the first sensing portion to form the third sensing portion.

[0014] This application also provides an overlock sewing machine, which includes a machine body and a thread-cutting sensing mechanism as described in any of the above embodiments, wherein the thread-cutting sensing mechanism is installed on the machine body.

[0015] Compared with existing technologies, the thread-cutting sensing mechanism and overlock sewing machine provided in this application, by creating a groove on the fixed blade and placing the first sensing part, on which the first sensing element is installed, within the groove, can both detect the fabric at that location through the first sensing element and facilitate the disassembly of the sensor. For example, after the connector disconnects the first housing from the fixed blade assembly, only a force along the length direction of the fixed blade assembly needs to be applied to the first sensing part, allowing it to move out of the groove and detach from the groove opening without being blocked by the fixed blade or other structures. Therefore, there is no need to remove the fixed blade or other components during disassembly, simplifying the operation and greatly improving the disassembly efficiency of the sensor. Furthermore, the connector connects the fixed blade assembly and the first housing along the height direction of the fixed blade assembly, which also reduces the difficulty of assembling and disassembling the connector, thereby further improving the disassembly efficiency of the sensor. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 A schematic diagram of the structure of an overlock sewing machine according to an embodiment of this application;

[0018] Figure 2 A schematic diagram of the structure of a wire-cutting sensing mechanism according to an embodiment of this application;

[0019] Figure 3 for Figure 2 An exploded view of the wire-cutting induction mechanism shown;

[0020] Figure 4 This is a schematic diagram of the structure of a wire-cutting sensing mechanism according to another embodiment of this application;

[0021] Figure 5 A schematic diagram of the wire-cutting sensing mechanism according to yet another embodiment provided in this application;

[0022] Figure 6 A schematic diagram of the structure of a sensor according to an embodiment of this application.

[0023] The symbols in the diagram represent the following meanings:

[0024] 100. Thread cutting sensor mechanism; 10. Fixed knife assembly; 11. Fixed knife; 111. Groove; 112. Second mounting hole; 12. Knife assembly fixing seat; 121. First fixing plate; 1211. Notch; 122. Second fixing plate; 13. Fabric baffle; 131. Second connecting hole; 14. Moving knife baffle; 20. Movable knife assembly; 21. Movable knife; 22. Rotating shaft; 30. Sensor; 31. First housing; 311. First sensing part; 312. Second sensing part; 313. First connecting hole; 314. First wiring groove; 315. Second wiring groove; 40. Presser foot safety switch; 41. Second housing; 411. Third sensing part; 200. Overlock sewing machine; 210. Machine body; 220. Needle plate; 230. Head light. Detailed Implementation

[0025] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0026] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or there may be an intermediate component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intermediate component present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application's specification are for illustrative purposes only and do not represent the only possible implementation.

[0027] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0028] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature and the second feature are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0029] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used in this application includes any and all combinations of one or more of the associated listed items.

[0030] Currently, overlock sewing machines with automatic thread trimming functions use sensors on the sewing table to identify the fabric's position and execute the thread trimming logic based on the fabric passing through and leaving the sensors. However, the sensors in existing structures cannot recognize some narrow or sharp-angled fabrics, which may result in the fabric being damaged during trimming.

[0031] To overcome this problem and improve the recognition of irregularly shaped fabrics, the relevant technology adopts the method of adding a sensor to the fixed blade area. However, during assembly, the sensor can only be installed from below the fixed blade. If the sensor fails, the entire blade holder structure must be removed to replace the sensor from below, which is complicated.

[0032] Please see Figures 1-6 To address the problem of inconvenient disassembly and assembly of the sensor 30 used for identifying irregularly shaped fabrics in related technologies, this application provides a thread-cutting sensing mechanism 100. The thread-cutting sensing mechanism 100 includes a fixed blade assembly 10 and a movable blade assembly 20, with the movable blade assembly 20 movably mounted on the fixed blade assembly 10. The fixed blade assembly 10 includes a blade assembly fixing seat 12, a fabric baffle 13, and a fixed blade 11, both of which are mounted on the blade assembly fixing seat 12. The movable blade assembly 20 includes a rotating shaft 22 and a movable blade 21. The rotating shaft 22 is rotatably connected to the blade assembly fixing seat 12, and the movable blade 21 is fixedly mounted on one end of the rotating shaft 22. The movable blade 21 can engage with the fixed blade 11 to cut the thread ends on the fabric.

[0033] Specifically, the knife assembly fixing base 12 includes a first fixing plate 121 and a second fixing plate 122. The fixing knife 11 is mounted above the first fixing plate 121, and the second fixing plate 122 is connected to the first fixing plate 121 and is set at an angle to the first fixing plate 121. A sewing baffle 13 is connected to the second fixing plate 122 and extends to the position of the first fixing plate 121, abutting against the first fixing plate 121. The side of the first fixing plate 121 away from the sewing baffle 13 is used to mount the needle plate 220. Typically, the upper surfaces of the sewing baffle 13 and the needle plate 220 are flush with the upper surface of the fixing knife 11, thereby facilitating fabric movement and preventing defects such as twisting during fabric movement. It should be noted that the upper surface here refers to the surface of the fixing knife 11 in contact with the fabric along the height direction of the fixing knife assembly 10, and the upper and lower parts of this application are defined based on this. The length direction of the fixing knife assembly 10 is the direction of fabric movement.

[0034] Since the movable blade 21 and the fixed blade 11 work together to cut the thread in an area that the fabric must pass through during movement, a sensor 30 is provided in this area of ​​the thread-cutting sensing mechanism 100 to better detect the area. Simultaneously, to facilitate the installation of the sensor 30, a groove 111 is recessed into one side wall of the fixed blade assembly 10 along its length. The groove 111 extends along the height of the fixed blade assembly 10 to both ends of the fixed blade 11. The sensor 30 is located below the fixed blade assembly 10 and includes a first housing 31 and a first sensing element (not shown). The first housing 31 forms a first sensing portion 311, and the first sensing element is installed in the first sensing portion 311, which is inserted into and installed within the groove 111. The thread-cutting sensing mechanism 100 also includes a connector (not shown), which passes sequentially through the fixed blade assembly 10 and the first housing 31 along the height of the fixed blade assembly 10 to securely connect the fixed blade assembly 10 and the first housing 31. When the connector disconnects the fixed blade assembly 10 from the first housing 31, the sensor 30 can move along the length of the fixed blade assembly 10 in a direction away from the groove 111.

[0035] Understandably, this application, by creating a groove 111 on the fixed blade 11 and placing the first sensing part 311, which houses the first sensing element, within the groove 111, achieves fabric detection at that location through the first sensing element and facilitates the disassembly of the sensor 30. For example, after the connector disconnects the first housing 31 from the fixed blade assembly 10, only a force needs to be applied to the first sensing part 311 along the length of the fixed blade assembly 10. The first sensing part 311 can then move out of the groove 111 and detach from the opening of the groove 111 without being blocked by the fixed blade 11 or other structures. Therefore, the fixed blade 11 or other structures do not need to be removed during disassembly, simplifying the operation and greatly improving the disassembly efficiency of the sensor 30. Furthermore, the connector connects the fixed blade assembly 10 and the first housing 31 along the height direction of the fixed blade assembly 10, which also reduces the difficulty of assembling and disassembling the connector, thereby further improving the disassembly efficiency of the sensor 30.

[0036] It should be noted that in the related structure, the sensor 30 requires the removal of the fixed blade 11 during disassembly. The fixed blade 11 is connected to the moving blade baffle 14, and the screws connecting the two are close to the inner side of the overlock sewing machine 200, causing considerable interference between the parts and making disassembly difficult. In contrast, this application only requires the removal of the needle plate 220, which is closer to the outer side of the overlock sewing machine 200. This makes disassembly much simpler than that of the fixed blade 11 and other structures, thus effectively improving disassembly efficiency.

[0037] In one embodiment, the upper surface of the first sensing part 311 is flush with the upper surface of the fixed blade 11. This reduces the influence of the fabric on the first sensing part 311 and prevents the fabric from being obstructed by unevenness on the surface of the fixed blade 11, thus avoiding fabric twisting and ensuring the processing quality of the fabric.

[0038] Furthermore, in one embodiment, one side of the first sensing part 311 along the length direction of the fixed knife assembly 10 is flush with the plane where the groove 111 is located. This facilitates the installation of the needle plate 220, reduces the gap between the needle plate 220 and the fixed knife 11, and ensures that there are no gaps or other defects on the upper surface of the fixed knife 11, thereby facilitating the movement of the fabric.

[0039] In one embodiment, such as Figure 2 and Figure 3 As shown, the first housing 31 also forms a second sensing part 312, which is disposed on one side of the fixed blade 11 along the width direction of the fixed blade assembly 10. The thread cutting sensing mechanism 100 also includes a second sensing element (not shown), which is mounted on the second sensing part 312. The function of the second sensing element is similar to that of the original sensing element used to detect fabric movement. That is, this application integrates the second sensing element and the first sensing element into one housing, resulting in fewer parts and simpler assembly.

[0040] Furthermore, such as Figure 3 As shown, the first housing 31 extends below the fabric baffle 13, and a first connecting hole 313 is provided on the first housing 31. A second connecting hole 131 is provided on the fabric baffle 13. The connector includes a first fastener, which passes through and connects the first connecting hole 313 and the second connecting hole 131. This facilitates the installation of the sensor 30.

[0041] To further improve the reliability of the connection between the sensor 30 and the fixed blade assembly 10, in one embodiment, a first mounting hole (not shown) is provided on the first housing 31, a second mounting hole 112 is provided on the fixed blade 11, and the connector also includes a second fastener, which passes through and connects the first mounting hole and the second mounting hole 112.

[0042] Since two second sensing elements are integrated on the first housing 31 in this embodiment, such as Figure 6 As shown, the first housing 31 has a first wiring groove 314 and a second wiring groove 315. One end of the first wiring groove 314 is connected to the first sensing unit 311, and the other end has an opening formed at the side wall of the first housing 31 to facilitate the wiring arrangement of the first sensing element. One end of the second wiring groove 315 is connected to the second sensing unit 312, and the other end has an opening formed at the end of the first housing 31 to facilitate the wiring arrangement of the second sensing element. This helps to reduce interference between the two wiring harnesses.

[0043] In another embodiment, such as Figure 4 As shown, the first sensing element may not be integrated with the second sensing element on the same housing; that is, the housing corresponding to the second sensing element can adopt a traditional installation method. In this case, to facilitate the installation of the first sensing element, the first housing 31 can be directly installed on the fixing blade 11. For example, the first housing 31 has a first mounting hole (not shown in the figure), and the fixing blade 11 has a second mounting hole 112. The connector also includes a second fastener, which passes through and connects the first mounting hole and the second mounting hole 112.

[0044] In one embodiment, such as Figures 2-5 As shown, a notch 1211 is recessed on one side wall of the first fixing plate 121 along the length direction of the fixing blade assembly 10. The notch 1211 corresponds to the groove 111, and the notch 1211 extends along the width direction of the fixing blade assembly 10. At least part of the first housing 31 is installed in the notch 1211. By creating the notch 1211 on the first fixing plate 121 to accommodate the first housing 31, the overall structure is more compact, and the space utilization of the wire cutting sensing mechanism 100 can be improved.

[0045] In one embodiment, such as Figures 2-5As shown, the wire-cutting sensing mechanism 100 also includes a pressure foot safety switch 40. The pressure foot safety switch 40 includes a second housing 41 and a switch body (not shown). The second housing 41 is connected to the fixed blade assembly 10, and the switch body is installed inside the second housing 41. The pressure foot safety switch 40 can improve the safety and reliability of the pressure foot operation.

[0046] Specifically, the second housing 41 of the presser foot safety switch 40 can be connected to the second fixing plate 122 by screws or the like, and the presser foot safety switch 40 and the sensor 30 are spaced apart in the height direction of the fixed knife assembly 10.

[0047] Furthermore, in one embodiment, the thread-cutting sensing mechanism 100 further includes a third sensing element (not shown), and the second housing 41 forms a third sensing part 411, on which the third sensing element is mounted. The third sensing element is correspondingly disposed and in responsive engagement with the first sensing element. That is, this application integrates the third sensing element into the presser foot safety switch 40, thereby eliminating the need for a corresponding housing, saving space and further reducing costs. Moreover, the first and third sensing elements can form a photosensitive relationship, increasing the sensing area for the fabric and thus enabling better identification of irregularly shaped fabrics.

[0048] For example, the first sensing element can be a receiving sensing element, and the third sensing element can be a transmitting sensing element, which can be reasonably set according to actual needs.

[0049] Specifically, in one embodiment, such as Figures 2-4 As shown, a portion of the second housing 41 is inclined upwards to form a third sensing element 411. In this way, the first sensing element and the third sensing element can be inclined to face each other, which is beneficial for better identification of irregularly shaped fabrics.

[0050] In another embodiment, such as Figure 5 As shown, a portion of the second housing 41 extends directly above the first sensing part 311 to form the third sensing part 411. In this way, the first sensing element and the third sensing element can be perpendicularly opposed, which is also beneficial for better identification of irregularly shaped fabrics.

[0051] This application also provides an overlock sewing machine 200, which includes a machine body 210 and a thread-cutting sensing mechanism 100 of any of the above embodiments, the thread-cutting sensing mechanism 100 being mounted on the machine body 210. A headlamp 230 is mounted on the machine body 210, and a sensing element is mounted on the headlamp 230 to form a photoelectric relationship with other sensing elements (e.g., a second sensing element).

[0052] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0053] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the scope of protection of this application. Therefore, the patent protection scope of this application should be determined by the appended claims.

Claims

1. A thread-cutting sensing mechanism, comprising a fixed blade assembly (10) and a movable blade assembly (20), wherein the movable blade assembly (20) is movably mounted on the fixed blade assembly (10), the fixed blade assembly (10) includes a fixed blade (11), and the movable blade assembly (20) includes a movable blade (21), wherein the movable blade (21) is capable of engaging with the fixed blade (11) to cut thread ends on fabric; Its features are, The fixing blade (11) has a groove (111) recessed on one side wall along the length direction of the fixing blade assembly (10), and the groove (111) extends to both ends of the fixing blade (11) along the height direction of the fixing blade assembly (10). The wire-cutting sensing mechanism further includes a sensor (30) and a connector. The sensor (30) is located below the fixed blade assembly (10). The sensor (30) includes a first housing (31) and a first sensing element. The first housing (31) has a first sensing part (311). The first sensing element is installed in the first sensing part (311), and the first sensing part (311) is inserted into and installed in the groove (111). The connector passes through the fixed blade assembly (10) and the first housing (31) sequentially along the height direction of the fixed blade assembly (10) to fix the fixed blade assembly (10) and the first housing (31). When the connector disconnects the fixed blade assembly (10) from the first housing (31), the sensor (30) can move along the length of the fixed blade assembly (10) away from the groove (111).

2. The wire-cutting sensing mechanism according to claim 1, characterized in that, One side of the first sensing part (311) along the length direction of the fixed blade assembly (10) is flush with the plane where the groove (111) is located; And / or, the upper surface of the first sensing part (311) is flush with the upper surface of the fixed blade (11).

3. The wire-cutting sensing mechanism according to claim 1, characterized in that, The first housing (31) also has a second sensing part (312), which is located on one side of the fixed blade (11) along the width direction of the fixed blade assembly (10). The wire cutting sensing mechanism also includes a second sensing element, which is mounted on the second sensing part (312).

4. The wire-cutting sensing mechanism according to claim 3, characterized in that, The fixed blade assembly (10) further includes a blade assembly fixing seat (12) and a sewing material baffle (13), the sewing material baffle (13) being installed on the blade assembly fixing seat (12); The first housing (31) extends below the sewing baffle (13), and the first housing (31) is provided with a first connecting hole (313), and the sewing baffle (13) is provided with a second connecting hole (131). The connector includes a first fastener, which passes through and connects the first connecting hole (313) and the second connecting hole (131).

5. The wire-cutting sensing mechanism according to any one of claims 1-4, characterized in that, The first housing (31) has a first mounting hole, the fixed blade (11) has a second mounting hole (112), and the connector also includes a second fastener, which passes through and connects the first mounting hole and the second mounting hole (112).

6. The wire-cutting sensing mechanism according to claim 1 or 3, characterized in that, The fixed blade assembly (10) further includes a blade assembly fixing seat (12), which includes a first fixing plate (121) and a second fixing plate (122). The fixed blade (11) is installed above the first fixing plate (121), and the second fixing plate (122) is connected to the first fixing plate (121) and is set at an angle to the first fixing plate (121). The first fixing plate (121) has a notch (1211) recessed on one side wall along the length direction of the fixing blade assembly (10). The notch (1211) is correspondingly provided with the groove (111), and the notch (1211) extends along the width direction of the fixing blade assembly (10). At least part of the first housing (31) is installed in the notch (1211).

7. The wire-cutting sensing mechanism according to claim 1, characterized in that, The wire-cutting sensing mechanism also includes a pressure foot safety switch (40), which includes a second housing (41) and a switch body. The second housing (41) is connected to the fixed blade assembly (10), and the switch body is installed inside the second housing (41).

8. The wire-cutting sensing mechanism according to claim 7, characterized in that, The wire-cutting sensing mechanism further includes a third sensing element, and the second housing (41) has a third sensing part (411) formed thereon, and the third sensing element is mounted on the third sensing part (411). The third sensing element is configured and cooperates with the first sensing element.

9. The wire-cutting sensing mechanism according to claim 8, characterized in that, The second housing (41) is partially inclined upward to form the third sensing part (411). Alternatively, a portion of the second housing (41) extends directly above the first sensing portion (311) to form the third sensing portion (411).

10. An overlock sewing machine, characterized in that, It includes a body (210) and a wire-cutting sensing mechanism as described in any one of claims 1-9, the wire-cutting sensing mechanism being mounted on the body (210).

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