Thread trimming mechanism and sewing machine with bird nest prevention function

Abstract

The present application provides a thread trimming mechanism and a sewing machine with an anti-bird nest function, which relates to the field of sewing device equipment. The thread trimming mechanism includes a fixed knife, a movable knife and a transmission assembly; the movable knife includes a fixed part and a wire dividing plate, the wire dividing plate is arc-shaped, and has a wire accommodating groove and a through hole, the first end of the wire accommodating groove extends to the edge of the wire dividing plate, and the second end is connected to the through hole; the edge of the wire dividing plate has a first notch and a second notch, the first notch is connected to the first end of the wire accommodating groove, the second notch is connected to the edge of the first notch, the second notch and the wire accommodating groove do not overlap each other in the length direction of the wire accommodating groove, wherein the second notch and the edge of the first notch are connected by an arc; the transmission assembly is constructed to drive the movable knife to reciprocate relative to the fixed knife, so that the movable knife and the fixed knife cooperate to cut the suture. The present application provides a thread trimming mechanism and a sewing machine with an anti-bird nest function, which can prevent the needle from being damaged by the movable knife at a faster thread trimming speed, thereby affecting the machine performance.

Description

Technical Field

[0001] The present application relates to the technical field of sewing devices and equipment, and in particular to a thread trimming mechanism and a sewing machine with an anti-bird nest function. Background Art

[0002] The movable knife is an important component of a semi-automatic sewing machine, which is used to cut the thread together with the fixed knife. The existing cutter can only cut the stitches after the sewing process is completed. When sewing for the second time, the needle will have a needle thread.

[0003] At present, fixed knives are respectively arranged on both sides of the existing sewing machine knife structure. When sewing starts, the sewing machine knife structure moves to the left under the drive of the driving device, the thread pressing plate clamps the needle thread end, the sewing machine knife structure continues to move to the left, the fixed knife cooperates with the blade to cut off the needle thread end to prevent the generation of excess thread ends or bird's nest-shaped thread ends. When sewing is finished, the sewing machine knife structure moves to the right under the drive of the driving device, the fixed knife cooperates with the blade to cut off the sewing thread end.

[0004] However, the dividing arc plate of this sewing equipment is not provided with a needle avoidance groove, and at a faster thread cutting speed, the needle is easily caused to collide with the moving knife when it descends or rises. Utility Model Content

[0005] The present application provides a thread trimming mechanism and a sewing machine with an anti-bird's nest function, which can prevent the needle from being damaged by the passive knife at a faster thread trimming speed, thereby affecting the machine performance.

[0006] In the first aspect, the present application provides a wire cutting mechanism with an anti-bird nest function, comprising a fixed knife, a movable knife and a transmission assembly; the movable knife is movably arranged relative to the fixed knife, the movable knife comprises a fixed part and a wire dividing plate, the wire dividing plate is arc-shaped, and has a wire accommodating groove and a through hole, the first end of the wire accommodating groove extends to the edge of the wire dividing plate, the second end is connected to the through hole, and part of the hole wall of the through hole forms a cutting edge for cutting the suture; the edge of the wire dividing plate has a first notch and a second notch, the first notch is connected to the first end of the wire accommodating groove, the second notch is connected to the edge of the first notch, and the second notch and the wire accommodating groove do not overlap each other in the length direction of the wire accommodating groove, wherein the second notch and the edge of the first notch are connected by an arc; the transmission assembly is constructed to drive the movable knife to reciprocate relative to the fixed knife, so that the cutting edge of the movable knife and the fixed knife cooperate to cut the suture.

[0007] As for the wire cutting mechanism with anti-bird nest function as mentioned above, optionally, the first notch extends to the edge of the wire distribution plate along the extension direction of the wire accommodating groove.

[0008] As in the above-mentioned wire trimming mechanism with anti-bird nest function, optionally, the second notch is at least connected to one side edge of the first notch close to the wire accommodating groove.

[0009] As in the above-mentioned thread trimming mechanism with anti-bird nest function, optionally, the second notch is an arc-shaped notch.

[0010] As for the above-mentioned wire trimming mechanism with anti-bird nest function, optionally, the ratio of the dimension of the second notch along the length direction of the wire accommodating groove to the dimension along the width direction of the wire accommodating groove is 1.5:1-2.0:1.

[0011] As in the above-mentioned wire trimming mechanism with anti-bird nest function, optionally, the second notch has a first notch edge close to the wire accommodating groove and a second notch edge away from the wire accommodating groove, wherein the first notch edge is an arc-shaped notch.

[0012] As in the above-mentioned wire trimming mechanism with anti-bird nest function, optionally, the edge of the second notch is a straight edge extending obliquely, and the edge of the second notch is connected to an edge of the first notch on one side away from the wire accommodating groove.

[0013] As for the above-mentioned wire cutting mechanism with anti-bird nest function, optionally, the second notch also has a third notch edge, the third notch edge is connected between the first notch edge and the second notch edge, and the third notch edge extends along the length direction of the wire accommodating groove; the second notch edge is an arc-shaped notch.

[0014] As for the above-mentioned wire cutting mechanism with anti-bird nest function, optionally, the wire dividing plate is arranged on the side of the fixed part, and a blocking part is arranged at the connection between the fixed part and the wire dividing plate, so that the movable knife stops at the blocking part when moving relative to the fixed knife.

[0015] In a second aspect, the present application provides a sewing machine, comprising the above-mentioned thread trimming mechanism with anti-bird nest function.

[0016] The present application provides a thread trimming mechanism and a sewing machine with an anti-bird nest function, the thread trimming mechanism includes a fixed knife, a movable knife and a transmission assembly; the movable knife is movably arranged relative to the fixed knife, the movable knife includes a fixed part and a wire dividing plate, the wire dividing plate is arc-shaped, and has a wire accommodating groove and a through hole, the first end of the wire accommodating groove extends to the edge of the wire dividing plate, the second end is connected to the through hole, and part of the hole wall of the through hole forms a cutting edge for cutting the suture; the edge of the wire dividing plate has a first notch and a second notch, the first notch is connected to the first end of the wire accommodating groove, the second notch is connected to the edge of the first notch, and the second notch and the wire accommodating groove do not overlap each other in the length direction of the wire accommodating groove, wherein the second notch and the edge of the first notch are connected by an arc; the transmission assembly is constructed to drive the movable knife to reciprocate relative to the fixed knife, so that the cutting edge of the movable knife and the fixed knife cooperate to cut the suture. The present application provides a thread trimming mechanism and a sewing machine with an anti-bird nest function, which can prevent the needle from being damaged by the movable knife at a faster thread trimming speed, thereby affecting the machine performance.

[0017] The purpose and beneficial effects of the thread trimming mechanism and sewing machine structure with anti-bird nest function provided by the present application and its other utility models will be more obvious and understandable through the description of the preferred embodiments in combination with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the movable knife structure in the prior art;

[0019] Figure 2 It is a structural schematic diagram of a wire cutting mechanism with an anti-bird nest function provided in an embodiment of the present application;

[0020] Figure 3 This is a schematic diagram of the first movable knife structure provided in the embodiment of the present application;

[0021] Figure 4 It is a partial enlarged view of point A;

[0022] Figure 5 It is a schematic diagram of the second movable knife structure provided in the embodiment of the present application;

[0023] Figure 6 It is a partial enlarged view of point B;

[0024] Figure 7 This is a schematic diagram of a third movable knife structure provided in an embodiment of the present application;

[0025] Figure 8 This is a partial enlarged view of point C.

[0026] Description of reference numerals:

[0027] 10-thread trimming mechanism;

[0028] 100-operation of the knife;

[0029] 110-fixed part;

[0030] 120-breakout board;

[0031] 121-wire duct;

[0032] 122-through hole;

[0033] 123-First gap;

[0034] 124 - second gap;

[0035] 125 - first notch edge;

[0036] 126 - second notch edge;

[0037] 127 - third notch edge;

[0038] 128- barrier portion;

[0039] 200-fixed knife;

[0040] 300-transmission assembly;

[0041] 310-moving tool holder;

[0042] 320-knife shaft connecting rod;

[0043] 330 - driving crank;

[0044] 400-presser foot;

[0045] 500-needle;

[0046] 600-Work surface. DETAILED DESCRIPTION

[0047] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0048] The movable knife is an important component of a semi-automatic sewing machine, which is used to cut the thread together with the fixed knife. The existing cutter can only cut the stitches after the sewing process is completed. When sewing for the second time, the needle will have a needle thread.

[0049] At present, the existing sewing motor knife structure is provided with fixed knives on both sides. When sewing starts, the sewing motor knife structure moves to the right under the drive of the driving device. Before sewing starts, the second notch of the sewing motor knife stops just below the needle and waits for sewing to start. When the sewing machine starts working, the needle moves downward and passes through the second notch, and then moves upward. When the needle moves to the top of the moving knife, the sewing motor knife structure moves to the right under the drive of the driving device, and the thread pressing plate clamps the needle thread end. The sewing motor knife structure continues to move to the right, and the fixed knife cooperates with the blade to cut off the needle thread end to prevent the generation of excess thread ends or bird's nest-shaped thread ends. Then the sewing motor knife structure moves to the left under the drive of the driving device until the moving knife thread dividing tip is a distance to the left of the needle directly below, and stops there to wait. At the end of sewing, the sewing machine knife structure moves to the right under the drive of the driving device, and the fixed knife cooperates with the blade to cut the sewing thread. Then the sewing machine knife structure moves to the left under the drive of the driving device until the second notch is directly below the needle, completing a cycle.

[0050] To this end, the present application provides a thread trimming mechanism with an anti-bird's nest function, which adopts a design of a combination of a moving knife and a fixed knife, so that when starting to sew, the moving knife moves toward the fixed knife, thereby cutting off the needle thread, and preventing the needle thread from being entangled to form a bird's nest-like thread when starting to sew for the second time; the design of setting an arc-shaped notch at the notch of the thread accommodating groove prevents the machine needle from being close to the moving knife, so that when the thread trimming speed is too fast, the machine needle is prevented from colliding with the moving knife when it descends to insert into the arc-shaped notch and when the machine needle is lifted out of the arc-shaped notch. Compared with the traditional thread trimming mechanism, this device can prevent the machine needle from being damaged by the moving knife due to the close distance between the machine needle and the moving knife at a faster thread trimming speed, thereby affecting the machine performance.

[0051] The following is a further description of a wire trimming mechanism with a bird nest prevention function in this embodiment.

[0052] Figure 1 It is a schematic diagram of a movable knife structure in the prior art; Figure 2 It is a structural schematic diagram of a wire cutting mechanism with an anti-bird nest function provided in an embodiment of the present application; Figure 3 This is a schematic diagram of the first movable knife structure provided in the embodiment of the present application; Figure 4 It is a partial enlarged view of point A; Figure 5 It is a schematic diagram of the second movable knife structure provided in the embodiment of the present application; Figure 6 It is a partial enlarged view of point B; Figure 7 This is a schematic diagram of a third movable knife structure provided in an embodiment of the present application; Figure 8 This is a partial enlarged view of point C.

[0053] like Figure 2 As shown, the embodiment of the present application provides a wire cutting mechanism 10 with a bird nest prevention function. Figure 2 As can be seen in the figure, a wire cutting mechanism 10 with an anti-bird nest function includes a fixed knife 200, a movable knife 100 and a transmission assembly 300; the movable knife 100 is movably arranged relative to the fixed knife 200, and the movable knife 100 includes a fixing portion 110 and a wire dividing plate 120, the wire dividing plate 120 is arc-shaped, and has a wire accommodating groove 121 and a through hole 122, the first end of the wire accommodating groove 121 extends to the edge of the wire dividing plate 120, and the second end is connected to the through hole 122, and part of the hole wall of the through hole 122 forms a cutting edge for cutting the suture; the edge of the wire dividing plate 120 It has a first notch 123 and a second notch 124, the first notch 123 is connected to the first end of the wire accommodating groove 121, the second notch 124 is connected to the edge of the first notch 123, and the second notch 124 and the wire accommodating groove 121 do not overlap each other in the length direction of the wire accommodating groove 121, wherein the second notch 124 and the edge of the first notch 123 are connected by an arc; the transmission assembly 300 is constructed to drive the movable knife 100 to reciprocate relative to the fixed knife 200, so that the cutting edge of the movable knife 100 and the fixed knife 200 cooperate to cut the suture.

[0054] In this way, the design of the combination of the movable knife 100 and the fixed knife 200 is adopted, so that when sewing, the movable knife 100 moves toward the fixed knife 200, thereby cutting off the needle thread, and avoiding the needle thread to be entangled to form a bird's nest-like thread when sewing for the second time; the design of providing an arc-shaped notch at the notch of the thread receiving groove 121 is adopted to avoid the machine needle 500 and the movable knife 100 from being close to each other, so that when the thread cutting speed is too fast, the machine needle 500 is prevented from colliding with the movable knife 100 when it descends to insert into the arc-shaped notch and when it is lifted out of the arc-shaped notch. Compared with the traditional thread cutting mechanism, this device can avoid the machine needle 500 being damaged by the passive knife 100 due to the close distance between the machine needle 500 and the movable knife 100 at a faster thread cutting speed, thereby affecting the machine performance.

[0055] Among them, Figure 2 As shown, the thread trimming mechanism 10 is arranged below the work surface 600, and the fixed knife 200 is fixedly arranged on the connecting rod. The movable knife 100 and the fixed knife 200 can perform relative shearing motion to realize the thread trimming function.

[0056] Specifically, Figure 3 As shown, the fixing portion 110 of the movable knife 100 is provided with at least two mounting holes, and bolts are passed through the mounting holes to fix the movable knife 100 on the movable knife holder 310. The movable knife holder 310 is hinged with a knife shaft connecting rod 320, and the end of the driving shaft is fixedly connected with a driving crank 330. When cutting the thread, the driving shaft rotates to make the driving crank 330 swing, and the driving crank 330 drives the movable knife holder 310 to rotate a certain angle through the knife shaft connecting rod 320, and the movable knife 100 on the movable knife holder 310 moves toward the fixed knife 200, so that the cutting edge on the movable knife and the cutting edge on the fixed knife rub against each other to cut the suture.

[0057] When sewing, the needle 500 faces the gap between the movable knife 100 and the fixed knife 200, and drives the crank 330 to abut against the limiting part. At this time, the maximum initial distance is maintained between the movable knife 100 and the fixed knife 200.

[0058] Specifically, the cutting distance of the movable knife 100 can be adjusted later through the adjusting part, that is, before use, the staff can adjust the angle of the driving crank 330 through the adjusting part to rotate the movable knife holder 310 to avoid the movable knife 100 from breaking the wire or getting stuck when cutting the wire.

[0059] When sewing, the needle 500 moves downward along the inside of the needle hole of the presser foot plate 400. When the needle 500 is lifted, the movable knife 100 moves toward the fixed knife 200 to cut off the excess thread ends to prevent the sewing thread ends from being entangled on the needle 500 to form a bird's nest-like thread ends. After cutting off the excess thread ends, the movable knife 100 is completely reset, and the needle 500 starts to sew. However, in the prior art, such as Figure 1As shown, the line separation plate is not provided with a needle avoidance groove, which results in that at a faster reset speed, the needle 500 may touch the edge of the moving knife 100, causing a needle collision phenomenon, thereby affecting the performance of the machine. Therefore, in order to avoid this needle collision phenomenon, a second notch 124 is provided next to the first notch 123, and the second notch 124 and the line accommodating groove 121 do not overlap each other in the length direction of the line accommodating groove 121, so that when the sewing machine is sewing normally, the needle 500 will fall into the space formed by the second notch 124 and the first notch 123, forming sufficient avoidance space to prevent the needle 500 from contacting the edge of the moving knife when moving.

[0060] In some embodiments, the first notch 123 extends to the edge of the wiring board 120 along the extension direction of the wire accommodating groove 121 .

[0061] Among them, Figure 4 As shown, the first notch 123 is in an arc shape, and the purpose of such a setting is to prevent the suture from being worn before entering the thread receiving groove 121. Specifically, the thread receiving groove 121 guides the suture so that the suture is restricted from sliding inside the thread receiving groove 121. When the suture moves to the position of the moving knife edge, it is cut by the moving knife 100.

[0062] In some embodiments, the second notch 124 is at least connected to one side edge of the first notch 123 close to the thread receiving groove 121. In some embodiments, the second notch 124 is an arc-shaped notch, which is designed to facilitate smooth transition of the suture into the thread receiving groove 121 when cutting the thread.

[0063] In some embodiments, the ratio of the dimension of the second notch 124 along the length direction of the wire accommodating groove 121 to the dimension of the second notch 124 along the width direction of the wire accommodating groove 121 is 1.5:1-2.0:1.

[0064] The size of the second notch 124 will affect the speed of thread trimming, that is, the larger the size of the second notch 124, the faster the thread trimming speed can be set. Figure 4 As shown, the second notch 124 is semicircular in shape, and when the machine needle 500 falls into the second notch 124 , there is a certain distance between the machine needle 500 and the second notch 124 .

[0065] In some embodiments, the second notch 124 has a first notch edge 125 close to the wire accommodating groove 121 and a second notch edge 126 away from the wire accommodating groove 121 , wherein the first notch edge 125 is an arc-shaped notch.

[0066] Among them, a dividing piece (not shown in the figure) is provided at the bottom of the movable knife 100, and the dividing plate 120 includes an inner inclined plane, and the inner inclined plane has a certain angle with the dividing plate body. Specifically, the sharp angle position of the inner inclined plane should be aligned with the sharp angle position of the dividing piece, which plays a role in pressing the thread to prevent the free end of the thread staying at the needle 500 from being too short when cutting the thread, causing the suture to fall off the needle 500, or the free end of the thread staying at the needle 500 is too long, causing the suture to be entangled on the fabric when sewing for the second time, resulting in a bird's nest phenomenon, causing the sewing material to be unqualified, and requiring manual trimming of the thread ends, increasing labor time, thereby affecting production efficiency.

[0067] In order to ensure that the position of the sharp angle of the inner inclined plane remains unchanged, the second notch edge 126 can be set as a straight edge or an arc edge.

[0068] In some embodiments, the second notch edge 126 is a straight line edge extending obliquely, such as Figure 6 As shown, the second notch edge 126 is connected to a side edge of the first notch 123 away from the wire accommodating groove 121 .

[0069] The second notch edge 126 is parallel to the side of the wire accommodating groove 121 and is Figure 4 In this embodiment, the second notch edge 126 is offset to the inner side of the dividing plate 120 to a greater extent, so that when cutting the thread, the needle 500 has enough avoidance space to prevent the needle 500 from colliding with the edge of the movable knife 100 when falling.

[0070] In some embodiments, the second notch 124 further has a third notch edge 127, the third notch edge 127 is connected between the first notch edge 125 and the second notch edge 126, and the third notch edge 127 extends along the length direction of the wire groove 121; the second notch edge 126 is an arc-shaped notch, such as Figure 8 shown.

[0071] Among them, compared with Figure 4 and Figure 6 In this embodiment, the angle between the inner inclined plane and the dividing plate 120 is relatively large. The purpose of this setting is to have a better thread pressing effect, which can prevent the suture from being derailed and skipped at a faster thread cutting speed, and the second notch edge 126 is set as an arc-shaped notch, so that the suture can transition to the inside of the second notch 124 more smoothly.

[0072] In some embodiments, the dividing plate 120 is disposed on the side of the fixing portion 110 , and a barrier portion 128 is disposed at the connection between the fixing portion 110 and the dividing plate 120 , so that the movable knife 100 stops at the barrier portion 128 when moving relative to the fixed knife 200 .

[0073] The engagement of the movable knife 100 should be strictly controlled, because if the engagement is too large, the knife may get stuck or damaged, and if the engagement is too small, the suture may not be cut when the suture is too thick. Therefore, under normal circumstances, the engagement between the movable knife 100 and the fixed knife 200 is between 1.5-2.0 mm, which is suitable to almost cover the protruding part of the blade of the movable knife 100.

[0074] Specifically, the shape of the blocking portion 128 matches the shape of the fixed knife 200 , and when the movable knife 100 and the fixed knife 200 move relative to each other, the bottom of the fixed knife 200 can slide along the top of the blocking portion 128 .

[0075] In some embodiments, the thread trimming mechanism 10 described above can be applied to household sewing machines and industrial sewing machines.

[0076] The thread trimming mechanism 10 further includes a presser foot plate 400. Figure 1 As shown, when the sewing machine is working, the presser foot rod will drive the presser foot plate 400 to move up and down, coordinating with the movement of the needle 500, and operating synchronously to complete the sewing work.

[0077] Among them, the sewing machine includes a sensor (not shown in the figure) and a controller (not shown in the figure). Specifically, different sewing speeds can be selected for sewing according to the thickness of the fabric to prevent the needle 500 from drifting and causing skipped stitches when sewing fabrics of uneven thickness.

[0078] Among them, common blade materials include stainless steel, carbon steel, etc. Blades made of different materials have different hardness and sharpness. Optionally, in this embodiment, the material of the movable knife 100 is stainless steel.

[0079] The sewing machine is also provided with a thread suction channel inside for collecting the cut sewing thread ends to keep the work surface 600 and the inside of the casing clean and tidy.

[0080] In this embodiment, the thread cutting mechanism 10 includes a fixed knife 200, a movable knife 100 and a transmission assembly 300; the movable knife 100 is movably arranged relative to the fixed knife 200, and the movable knife 100 includes a fixing portion 110 and a wire dividing plate 120, the wire dividing plate 120 is arc-shaped, and has a wire accommodating groove 121 and a through hole 122, the first end of the wire accommodating groove 121 extends to the edge of the wire dividing plate 120, the second end is connected to the through hole 122, and part of the hole wall of the through hole 122 forms a cutting edge for cutting the suture; the edge of the wire dividing plate 120 has a first notch The first notch 123 and the second notch 124 are connected, the first notch 123 and the first end of the thread receiving groove 121 are connected, the second notch 124 is connected to the edge of the first notch 123, and the second notch 124 and the thread receiving groove 121 do not overlap each other in the length direction of the thread receiving groove 121, wherein the second notch 124 and the edge of the first notch 123 are connected by an arc; the transmission assembly 300 is configured to drive the movable knife 100 to reciprocate relative to the fixed knife 200, so that the cutting edge of the movable knife 100 and the fixed knife 200 cooperate to cut the suture. The present application provides a thread trimming mechanism and a sewing machine, which can prevent the needle from being damaged by the movable knife at a faster thread trimming speed, thereby affecting the machine performance. In this way, the design of the combination of the movable knife 100 and the fixed knife 200 is adopted, so that when sewing, the movable knife 100 moves toward the fixed knife 200, thereby cutting off the needle thread, and avoiding the needle thread to be entangled to form a bird's nest-like thread when sewing for the second time; the design of providing an arc-shaped notch at the notch of the thread receiving groove 121 is adopted to avoid the machine needle 500 and the movable knife 100 from being close to each other, so that when the thread cutting speed is too fast, the machine needle 500 is prevented from colliding with the movable knife 100 when it descends to insert into the arc-shaped notch and when it is lifted out of the arc-shaped notch. Compared with the traditional thread cutting mechanism, this device can avoid the machine needle 500 being damaged by the passive knife 100 due to the close distance between the machine needle 500 and the movable knife 100 at a faster thread cutting speed, thereby affecting the machine performance.

[0081] The terms "first", "second", etc. in the embodiments of the present application are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the embodiments of the present application described here. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0082] In the embodiments of the present application, the terms "upper", "lower", "inside", "middle", "outside", "front", "back" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. These terms are mainly intended to better describe the present application and its embodiments, and are not intended to limit the indicated devices, elements or components to have specific orientations, or to be constructed and operated in specific orientations. Moreover, in addition to being used to indicate orientations or positional relationships, some of the above terms may also be used to indicate other meanings. For example, the term "upper" may also be used to indicate a certain dependency or connection relationship in certain circumstances. For those of ordinary skill in the art, the specific meanings of these terms in the embodiments of the present application can be understood according to the specific circumstances.

[0083] In addition, the terms "disposed", "connected", and "fixed" should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present disclosure can be understood according to specific circumstances.

[0084] It should be noted that the embodiments represented by "one embodiment", "an embodiment", "an exemplary embodiment", "some embodiments", etc. mentioned in the specification may include specific features, structures or characteristics, but not every embodiment may include the specific features, structures or characteristics. In addition, such phrases do not necessarily refer to the same embodiment. In addition, when describing specific features, structures or characteristics in conjunction with an embodiment, it is within the knowledge of those skilled in the art to implement such features, structures or characteristics in conjunction with other embodiments that are explicitly or not explicitly described.

[0085] In general, terms should be understood, at least in part, by the context in which they are used. For example, the terms "one or more" as used herein may be used to describe any feature, structure, or characteristic in a singular sense, or may be used to describe a combination of features, structures, or characteristics in a plural sense, depending, at least in part, on the context. Similarly, terms such as "an" may also be understood to convey singular usage or to convey plural usage, depending, at least in part, on the context.

[0086] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A wire cutting mechanism with anti-bird nest function, characterized in that: It includes a fixed knife, a movable knife and a transmission component; The movable knife is movably arranged relative to the fixed knife, and the movable knife includes a fixed portion and a wire dividing plate, the wire dividing plate is arc-shaped and has a wire accommodating groove and a through hole, the first end of the wire accommodating groove extends to the edge of the wire dividing plate, the second end is connected to the through hole, and part of the hole wall of the through hole forms a cutting edge for shearing the suture; The edge of the line distribution plate has a first notch and a second notch, the first notch is connected to the first end of the line accommodating groove, the second notch is connected to the edge of the first notch, and the second notch and the line accommodating groove do not overlap each other in the length direction of the line accommodating groove, wherein the second notch is connected to the edge of the first notch by an arc; The transmission assembly is configured to drive the movable knife to reciprocate relative to the fixed knife, so that the cutting edge of the movable knife cooperates with the fixed knife to cut the suture.

2. The wire trimming mechanism with anti-bird nest function according to claim 1, characterized in that: The first notch extends along the extension direction of the wire accommodating groove to the edge of the wiring board.

3. The wire trimming mechanism with bird nest prevention function according to claim 1 or 2, characterized in that: The second notch is at least connected to a side edge of the first notch close to the wire accommodating groove.

4. The wire trimming mechanism with anti-bird nest function according to claim 3, characterized in that: The second notch is an arc-shaped notch.

5. The wire trimming mechanism with bird nest prevention function according to claim 4, characterized in that: The ratio of the size of the second notch along the length direction of the wire accommodating groove to the size of the second notch along the width direction of the wire accommodating groove is 1.5:1-2.0:

1.

6. The wire trimming mechanism with bird nest prevention function according to claim 3, characterized in that: The second notch has a first notch edge close to the wire accommodating groove and a second notch edge away from the wire accommodating groove, wherein the first notch edge is an arc-shaped notch.

7. The wire trimming mechanism with bird nest prevention function according to claim 6, characterized in that: The second notch edge is a straight line edge extending obliquely, and the second notch edge is connected to a side edge of the first notch away from the wire accommodating groove.

8. The wire trimming mechanism with bird nest prevention function according to claim 6, characterized in that: The second notch further has a third notch edge, the third notch edge is connected between the first notch edge and the second notch edge, and the third notch edge extends along the length direction of the wire accommodating groove; The edge of the second notch is an arc-shaped notch.

9. The wire trimming mechanism with bird nest prevention function according to claim 1 or 2, characterized in that: The line dividing plate is arranged at the side of the fixing part, and a blocking part is arranged at the connection between the fixing part and the line dividing plate, so that the movable knife stops at the blocking part when moving relative to the fixed knife.

10. A sewing machine, characterized in that: It comprises the wire cutting mechanism with anti-bird nest function as described in any one of claims 1 to 9.

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