Trimming induction mechanism and overedger

Abstract

The utility model relates to the technical field of sewing, in particular to a thread trimming induction mechanism and an overedger. The thread trimming sensing mechanism comprises a cutter set fixing seat, a fixing cutter and a first sensor, the cutter set fixing seat comprises a first fixing plate, and a first mounting hole is formed in the first fixing plate in a penetrating mode. The fixed cutter is mounted on one side face of the first fixed plate, a second mounting hole is formed in the fixed cutter in a penetrating mode, and the first mounting hole and the second mounting hole are coaxially formed. The first sensor is installed on the side face, away from the fixed cutter, of the first fixing plate and comprises a sensing head arranged at one end of the first sensor, the sensing head is inserted and installed in the first installation hole and the second installation hole, and at least part of the end, away from the sensing head, of the first sensor penetrates through the first fixing plate and is connected with the fixed cutter. According to the thread trimming induction mechanism and the overedger, the problem that an existing overedger is difficult to detect irregular-shaped cloth, so that the cloth is easily cut off by a thread trimmer is solved.

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 identify the position of the fabric using sensors on the sewing table. They determine the presence of fabric by the fabric passing by or leaving the sensor, and then control the thread trimming accordingly.

[0003] In related technologies, sensors are usually arranged linearly on a table. However, since there is still a distance between the area where the fabric must pass through and the area where the sensor is arranged, the sensor cannot effectively detect the area that the fabric must pass through. Therefore, if the fabric is irregularly shaped, such as a triangle, the existing sensor cannot recognize it, which will cause the thread cutter to damage the fabric and make it unusable. Utility Model Content

[0004] Therefore, it is necessary to provide a thread-cutting sensing mechanism and an overlock sewing machine to solve the problem that existing overlock sewing machines have difficulty detecting irregularly shaped fabrics, which can easily lead to the thread cutter damaging the fabric.

[0005] This application provides a wire-cutting sensing mechanism, which includes a blade assembly fixing base, a fixed blade, and a first sensor. The blade assembly fixing base includes a first fixing plate, and the first fixing plate has a through-hole. The fixed blade is mounted on one side of the first fixing plate, and the fixed blade has a through-hole, the first mounting hole and the second mounting hole being coaxially arranged. The first sensor is mounted on the side of the first fixing plate away from the fixed blade. The first sensor includes a sensing head disposed at one end of the first sensor. The sensing head is inserted into and mounted in the first mounting hole and the second mounting hole. The end of the first sensor away from the sensing head at least partially passes through the first fixing plate and is connected to the fixed blade.

[0006] In one embodiment, the end face of the sensing head is flush with the surface of the fixed blade that is opposite to the first fixed plate.

[0007] In one embodiment, the first sensor further includes a main body and a connecting part, the sensing head and the connecting part are respectively connected to the main body, and the connecting part passes through the first fixing plate and abuts against the fixing blade; wherein, the connecting part has a first connecting hole, the fixing blade has a second connecting hole, and the wire cutting sensing mechanism further includes a connector, the connector passes through and is connected to the first connecting hole and the second connecting hole.

[0008] In one embodiment, the first fixing plate has a mounting groove that communicates with the first mounting hole, wherein at least a portion of the main body is accommodated within the mounting groove.

[0009] In one embodiment, the first fixing plate is further provided with a wiring groove, one end of which is connected to the mounting groove, and the other end is provided through the side wall of the first fixing plate.

[0010] In one embodiment, the first fixing plate is provided with a first positioning hole, the fixing blade is provided with a second positioning hole, and the wire cutting sensing mechanism further includes a positioning member, which is inserted into and installed in the first positioning hole and the second positioning hole; and / or, the first fixing plate is provided with a first fixing hole, the fixing blade is provided with a second fixing hole, and the wire cutting sensing mechanism further includes a fixing member, which is inserted into and installed in the first fixing hole and the second fixing hole.

[0011] In one embodiment, the fixing blade, the first fixing plate, and the first sensor are all arranged in an L-shape.

[0012] In one embodiment, the blade assembly mounting base further includes a second mounting plate and a support bracket, the second mounting plate being connected to the first mounting plate, and the support bracket being connected to the side of the second mounting plate away from the first mounting plate; the wire cutting sensing mechanism further includes a second sensor, the second sensor being mounted on the support bracket, and the second sensor and the first sensor being correspondingly arranged.

[0013] In one embodiment, the wire-cutting sensing mechanism further includes a headlight and a second sensor, the second sensor being mounted on the headlight, and the second sensor and the first sensor being configured correspondingly.

[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 setting the sensing head of the first sensor on the fixed blade, allow the first sensor to cooperate with existing sensors when the fabric passes through the fixed blade, thereby effectively identifying irregular fabrics such as triangles. This significantly reduces the number of times the fabric is cut when sewing irregular fabrics due to sensor layout issues failing to effectively identify the fabric shape, thus lowering the fabric scrap rate. Simultaneously, the end of the first sensor furthest from the sensing head is connected to the fixed blade, and with the limiting installation between the sensing head and the first and second mounting holes, the installation strength of the first sensor is effectively guaranteed, reducing the probability of the first sensor and sensing head shaking, thereby ensuring that the sensing head can effectively detect the fabric. 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 An exploded view of a wire-cutting sensing mechanism according to an embodiment provided in this application;

[0020] Figure 4 A schematic diagram of the structure of the fixing blade according to an embodiment of this application;

[0021] Figure 5 A schematic diagram of the structure of a tool assembly fixing seat according to an embodiment of this application;

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

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

[0024] 100. Thread cutting sensing mechanism; 10. Knife assembly fixing seat; 11. First fixing plate; 111. First mounting hole; 112. Mounting groove; 113. Wiring groove; 114. First positioning hole; 115. First fixing hole; 12. Second fixing plate; 13. Support bracket; 20. Fixed knife; 21. Second mounting hole; 22. Second connecting hole; 23. Second positioning hole; 24. Second fixing hole; 30. Movable knife; 40. Baffle; 50. First sensor; 51. Sensing head; 52. Main body; 53. Connecting part; 531. First connecting hole; 60. Second sensor; 70. Head light; 71. Mounting point; 200. Overlock sewing machine; 210. Machine body. 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 identify the position of the fabric using sensors on the sewing table. They determine the presence of fabric by the fabric passing by or leaving the sensor, and then control the thread trimming accordingly.

[0031] In related technologies, sensors are usually arranged linearly on a table. However, since there is still a distance between the area where the fabric must pass through and the area where the sensor is arranged, the sensor cannot effectively detect the area that the fabric must pass through. Therefore, if the fabric is irregularly shaped, such as a triangle, the existing sensor cannot recognize it, which will cause the thread cutter to damage the fabric and make it unusable.

[0032] Please see Figures 1-6 To address the problem that existing overlock sewing machines struggle to detect irregularly shaped fabrics, which can easily lead to the thread cutter damaging the fabric, this application provides a thread-cutting sensing mechanism 100. This mechanism 100 includes a blade assembly fixing base 10, a baffle 40, a movable blade 30, and a fixed blade 20. The fixed blade 20 is fixedly mounted on the blade assembly fixing base 10, and the movable blade 30 is movably mounted on the blade assembly fixing base 10. The movable blade 30 and the fixed blade 20 cooperate to cut the thread. The baffle 40 is connected to the blade assembly fixing base 10, and its surface is flush with the surface of the fixed blade 20 to facilitate fabric movement.

[0033] Specifically, the knife assembly mounting base 10 includes a first fixing plate 11 and a second fixing plate 12. The second fixing plate 12 is connected to the first fixing plate 11, and the second fixing plate 12 and the first fixing plate 11 are arranged at an angle. A fixed knife 20 is mounted on one side of the first fixing plate 11, and a movable knife 30 is mounted on the second fixing plate 12 and can rotate relative to the second fixing plate 12. When the fabric is sewn and thread cutting is required, the movable knife 30 will rotate towards the fixed knife 20 to engage and cut the thread.

[0034] Since the movable blade 30 and the fixed blade 20 are positioned in the area that the fabric must pass through during movement, in order to better detect this area, in one embodiment, as follows: Figure 2 and Figure 3 As shown, the wire-cutting sensing mechanism 100 also includes a first sensor 50, which is mounted on the side of the first fixing plate 11 away from the fixing blade 20. The first sensor 50 includes a sensing head 51 disposed at one end of the first sensor 50. The first fixing plate 11 has a through-hole 111, and the fixing blade 20 has a through-hole 21. The first mounting hole 111 and the second mounting hole 21 are coaxially arranged, and the sensing head 51 is inserted into and mounted in the first mounting hole 111 and the second mounting hole 21. Furthermore, the end of the first sensor 50 away from the sensing head 51 at least partially passes through the first fixing plate 11 and is connected to the fixing blade 20.

[0035] Understandably, by setting the sensing head 51 of the first sensor 50 on the fixed blade 20, when the fabric passes through the fixed blade 20, the first sensor 50 can cooperate with the existing sensors to effectively identify irregular fabrics such as triangles. This greatly reduces the number of times the fabric is cut when sewing irregular fabrics due to sensor layout issues failing to effectively identify the fabric shape, thus reducing the fabric scrap rate. Simultaneously, the end of the first sensor 50 furthest from the sensing head 51, connected to the fixed blade 20 and with the limiting installation between the sensing head 51 and the first mounting hole 111 and the second mounting hole 21, effectively ensures the installation strength of the first sensor 50, reducing the probability of the first sensor 50 and sensing head 51 shaking, thereby ensuring that the sensing head 51 can effectively detect the fabric.

[0036] In one embodiment, such as Figure 2 As shown, the end face of the sensing head 51 is flush with the surface of the fixed blade 20 that is away from the first fixed plate 11. This prevents the fabric from scratching the surface of the sensing head 51 after passing through the fixed blade 20 multiple times, thus preventing the sensing head 51 from malfunctioning. It also ensures that the surface of the fixed blade 20 is not uneven and will not obstruct the fabric from passing through, thus preventing the fabric from twisting and ensuring the quality of fabric processing.

[0037] To enhance the connection strength between the first sensor 50 and the fixed blade 20, in one embodiment, such as Figure 3 and Figure 4 As shown, the first sensor 50 also includes a main body 52 and a connecting part 53. The sensing head 51 and the connecting part 53 are respectively connected to the main body 52, and the connecting part 53 passes through the first fixing plate 11 and abuts against the fixing blade 20. The connecting part 53 has a first connecting hole 531, and the fixing blade 20 has a second connecting hole 22. The wire-cutting sensing mechanism 100 also includes a connector (not shown), which passes through and connects to the first connecting hole 531 and the second connecting hole 22. This allows for a reliable connection between the first sensor 50 and the fixing blade 20. Here, the connector can be a screw or bolt, etc., making the connection simple.

[0038] Specifically, the sensing head 51 and the connecting part 53 can be connected to opposite ends of the main body 52, with the sensing head 51 protruding and connected to the surface of the main body 52, and the connecting part 53 connected to the side of the main body 52. ​​In this way, the installation and fit between the first sensor 50 and the first fixing plate 11 and the fixing blade 20 is more stable.

[0039] In one embodiment, such as Figure 2 and Figure 5 As shown, a mounting groove 112 is provided on the first fixing plate 11, which communicates with the first mounting hole 111. At least a portion of the main body 52 is accommodated within the mounting groove 112. Thus, when the first sensor 50 is mounted on the first fixing plate 11, it can be limited by the mounting groove 112, and the size of the first sensor 50 protruding from the first fixing plate 11 is reduced. This reduces the likelihood of the first sensor 50 colliding with other structures and causing damage to the connection between the sensing head 51 and the main body 52, resulting in higher safety. Furthermore, the entire wire-cutting sensing mechanism 100 has a more compact structure, thereby significantly reducing costs.

[0040] Furthermore, in one embodiment, as Figure 5 As shown, a wiring groove 113 is also provided on the first fixing plate 11. One end of the wiring groove 113 is connected to the mounting groove 112, and the other end is disposed through the side wall of the first fixing plate 11. It is easy to understand that the wiring groove 113 facilitates the wiring arrangement of the first sensor 50, which not only facilitates the transmission of sensing signals, but also effectively improves the aesthetics of the wiring of the entire device, while reducing the probability of the wiring harness being damaged by contact with other structures.

[0041] In one embodiment, such as Figures 3-5As shown, the first fixing plate 11 has a first positioning hole 114, the fixing blade 20 has a second positioning hole 23, and the wire cutting sensing mechanism 100 also includes a positioning element (not shown), which is inserted into and installed in the first positioning hole 114 and the second positioning hole 23. It can be understood that this arrangement facilitates the determination of the position of the fixing blade 20 relative to the first fixing plate 11, thereby improving the reliability of the connection between the two.

[0042] Here, the positioning element can be set as a positioning pin or other structure. In other embodiments, the positioning element can also be connected to one of the fixing blade 20 and the first fixing plate 11 and cooperate with the positioning hole on the other to achieve positioning connection. The specific configuration can be reasonably set according to the actual situation.

[0043] Furthermore, in one embodiment, the first fixing plate 11 is provided with a first fixing hole 115, the fixing blade 20 is provided with a second fixing hole 24, and the wire cutting sensing mechanism 100 further includes a fixing member (not shown), which is inserted into and installed in the first fixing hole 115 and the second fixing hole 24. In this way, a reliable connection between the first fixing plate 11 and the fixing blade 20 can be achieved.

[0044] Here, the positioning element can also be connected using screws or bolts.

[0045] Specifically, in this embodiment, there are two first fixing holes 115 and two fixing holes 24 to further enhance the connection strength of the fixing blade 20 on the first fixing plate 11. The second connecting hole 22 that connects the first sensor 50 and the fixing blade 20 can be set between the two second fixing holes 24. In this way, the connecting part 53 on the first sensor 50 can pass through the part between the two first fixing holes 115 on the first fixing plate 11, thereby realizing the limiting of the connecting part 53 on the first sensor 50 by the first fixing plate 11, and the overall connection is more stable.

[0046] In one embodiment, the fixing blade 20, the first fixing plate 11, and the first sensor 50 are all arranged in an L-shape, which facilitates the opening of various holes and can effectively ensure the reliability of the connection between them.

[0047] In one embodiment, such as Figures 1-3 As shown, the thread-cutting sensing mechanism 100 also includes a second sensor 60, which is correspondingly arranged with the first sensor 50. That is, in this embodiment, the first sensor 50 and the second sensor 60 mutually sense and transmit signals, which is beneficial to further improve the detection effect on irregular fabrics. Here, the second sensor 60 and the first sensor 50 can be spaced apart in the height direction of the sensing head 51.

[0048] For example, in this embodiment, the first sensor 50 can be configured as a sensor transmitter and the second sensor 60 can be configured as a sensor receiver. The second sensor 60 is located on the opposite side of the first sensor 50 in the area that the fabric must pass through, so that the first sensor 50 and the second sensor 60 can form a photoelectric relationship.

[0049] To achieve the installation of the second sensor 60, in one embodiment, such as Figure 2 and Figure 3 As shown, the knife assembly mounting base 10 also includes a support bracket 13, which is connected to the side of the second fixing plate 12 away from the first fixing plate 11, and the second sensor 60 is mounted on the support bracket 13. In this way, the installation of the second sensor 60 is simple, and it is more stable during operation. This avoids significant shaking of the second sensor 60 caused by the high-speed movement of the needle during sewing in the overlock sewing machine 200, ensuring the reliability of the sensing cooperation between the second sensor 60 and the first sensor 50.

[0050] In another embodiment, such as Figure 1 and Figure 6 As shown, the wire-cutting sensing mechanism 100 also includes a headlight 70 and a second sensor 60, which is mounted on the headlight 70. Thus, the installation of the second sensor 60 can also be achieved.

[0051] Specifically, the headlight 70 is mounted on the body 210 of the overlock sewing machine 200, and a mounting plate can extend from the headlight 70. The second sensor 60 can be fixed to the mounting point 71 of the headlight 70 by means of screws or the like.

[0052] 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.

[0053] 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.

[0054] 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 wire-cutting sensing mechanism, characterized in that, include: The tool assembly fixing base (10) includes a first fixing plate (11) and a first mounting hole (111) is provided through the first fixing plate (11). A fixing blade (20) is installed on one side of the first fixing plate (11), and a second mounting hole (21) is provided on the fixing blade (20) through the first mounting hole (111) and the second mounting hole (21) are coaxially arranged. A first sensor (50) is mounted on one side of the first fixing plate (11) away from the fixing blade (20). The first sensor (50) includes a sensing head (51) disposed at one end of the first sensor (50). The sensing head (51) is inserted into and installed in the first mounting hole (111) and the second mounting hole (21). The end of the first sensor (50) away from the sensing head (51) at least partially passes through the first fixing plate (11) and is connected to the fixing blade (20).

2. The wire-cutting sensing mechanism according to claim 1, characterized in that, The end face of the sensing head (51) is flush with the surface of the fixed blade (20) that is away from the first fixed plate (11).

3. The wire-cutting sensing mechanism according to claim 1, characterized in that, The first sensor (50) further includes a main body (52) and a connecting part (53). The sensing head (51) and the connecting part (53) are respectively connected to the opposite ends of the main body (52). The connecting part (53) passes through the first fixing plate (11) and abuts against the fixing blade (20). The connecting part (53) has a first connecting hole (531), the fixing knife (20) has a second connecting hole (22), and the wire cutting sensing mechanism also includes a connector, which passes through and connects to the first connecting hole (531) and the second connecting hole (22).

4. The wire-cutting sensing mechanism according to claim 3, characterized in that, The first fixing plate (11) has an installation groove (112) which is connected to the first mounting hole (111). At least a portion of the main body (52) is accommodated in the installation groove (112).

5. The wire-cutting sensing mechanism according to claim 4, characterized in that, The first fixing plate (11) is also provided with a wiring groove (113), one end of which is connected to the mounting groove (112), and the other end is provided through the side wall of the first fixing plate (11).

6. The wire-cutting sensing mechanism according to claim 1, characterized in that, The first fixing plate (11) is provided with a first positioning hole (114), the fixing blade (20) is provided with a second positioning hole (23), and the wire cutting sensing mechanism also includes a positioning member, which is inserted into and installed in the first positioning hole (114) and the second positioning hole (23); And / or, the first fixing plate (11) is provided with a first fixing hole (115), the fixing knife (20) is provided with a second fixing hole (24), and the wire cutting sensing mechanism further includes a fixing member, which is inserted into and installed in the first fixing hole (115) and the second fixing hole (24).

7. The wire-cutting sensing mechanism according to claim 1, characterized in that, The fixed blade (20), the first fixed plate (11), and the first sensor (50) are all arranged in an L-shape.

8. The wire-cutting sensing mechanism according to any one of claims 1-7, characterized in that, The blade assembly fixing seat (10) further includes a second fixing plate (12) and a support bracket (13). The second fixing plate (12) is connected to the first fixing plate (11), and the support bracket (13) is connected to the side of the second fixing plate (12) away from the first fixing plate (11). The wire-cutting sensing mechanism further includes a second sensor (60), which is mounted on the support bracket (13), and the second sensor (60) and the first sensor (50) are correspondingly arranged.

9. The wire-cutting sensing mechanism according to any one of claims 1-7, characterized in that, The wire-cutting sensing mechanism also includes a headlight (70) and a second sensor (60), the second sensor (60) being mounted on the headlight (70), and the second sensor (60) and the first sensor (50) being configured correspondingly.

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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