A wire cutting component and a metal wire embroidery device

Abstract

This application discloses a wire cutting assembly and a metal wire embroidery device. In the wire cutting assembly, if the fixed blade includes a first fixed cutting edge and a second fixed cutting edge set at an obtuse angle, and the moving blade has a third moving cutting edge. If the fixed blade has a third fixed cutting edge, and the moving blade includes a first moving cutting edge and a second moving cutting edge set at an obtuse angle. By first making a sharp cut and then making a steady cut, the cut surface of the metal wire segment can be ensured to be flat; or, the concave V-shape can stably restrict the degree of freedom of the metal wire, preventing the metal wire from slipping or deforming at the moment of cutting, which helps to make the cut surface of the metal wire segment flat.

Description

Technical Field

[0001] This utility model generally relates to the field of computer embroidery machine technology, and in particular to a wire cutting component and a metal wire embroidery device. Background Technology

[0002] Metallic wire, also known as spring wire or Indian wire, is a copper-based, spring-shaped material that is electroplated and can reach a diameter of 0.02mm. It is corrosion-resistant, highly reflective, and more eye-catching than ordinary embroidery thread. Due to its spring-like properties, it is flexible and adaptable, making it easier to express the texture and shape of objects. From a distance, the reflective metallic wire resembles beads, with exquisite patterns and a rich metallic luster and texture, effectively enhancing clothing and elevating one's presence.

[0003] Because of the special structure of metal wire, it needs to be cut to a certain length according to the needs of the embroidery pattern during the embroidery process. In related technologies, metal wire embroidery has always been hand embroidery and has never been automated.

[0004] Based on this, a metal wire embroidery device is proposed, which can automatically embroider metal wires. However, this metal wire embroidery device has the problem of uneven cut surfaces of the metal wire segments. Utility Model Content

[0005] This utility model provides a wire-cutting assembly, comprising: a movable blade and a fixed blade arranged opposite to and spaced apart in the horizontal direction, wherein the movable blade can move closer to or further away from the fixed blade. The fixed tool includes a fixed tool cutting edge portion, which includes a first fixed tool cutting edge and a second fixed tool cutting edge arranged at an obtuse angle. The moving tool cutting edge portion is provided with a third moving tool cutting edge. When the moving tool approaches the fixed tool, the first fixed tool cutting edge, the second fixed tool cutting edge, and the third moving tool cutting edge form different acute angles; or... The fixed cutting edge is provided with a third fixed cutting edge, and the moving cutting edge includes a first moving cutting edge and a second moving cutting edge set at an obtuse angle. When the moving cutting edge approaches the fixed cutting edge, the first moving cutting edge and the second moving cutting edge form different acute angles with the third fixed cutting edge.

[0006] As an implementation method, when the moving tool approaches the fixed tool, the cutting edge of the third fixed tool first contacts the cutting edge of the first moving tool to form a first acute angle, and then contacts the cutting edge of the second moving tool to form a second acute angle, wherein the first acute angle is smaller than the second acute angle.

[0007] As an implementation method, when the moving tool approaches the fixed tool, the cutting edge of the third moving tool first contacts the cutting edge of the first fixed tool to form a first acute angle, and then contacts the cutting edge of the second fixed tool to form a second acute angle, wherein the first acute angle is smaller than the second acute angle.

[0008] As one possible implementation, the fixed blade portion further includes a first upper surface and a first lower surface disposed opposite to each other, with the fixed blade extending obliquely from the first lower surface toward the first upper surface and toward the moving blade, the fixed blade connecting the first upper surface and the first lower surface. The fixed cutting edge includes a first cutting edge area and a second cutting edge area. The first cutting edge area intersects with the first upper surface to form the first fixed cutting edge, and the second cutting edge area intersects with the first upper surface to form the second fixed cutting edge.

[0009] As an implementation method, the moving blade portion further includes a second upper surface and a second lower surface disposed opposite to each other, the moving blade extending obliquely from the second upper surface to the second lower surface and toward the fixed blade, the moving blade connecting the second upper surface and the second lower surface, and the moving blade intersecting the second lower surface to form the third moving cutting edge.

[0010] As an implementation method, at least the moving blade has a first thinning zone, and the distance between the second upper surface and the second lower surface is less than or equal to 1.5 mm.

[0011] As one possible implementation, a second thinning region is formed by recessing from the second upper surface toward the second lower surface, and the second thinning region is connected to the first thinning region.

[0012] As an implementation method, the bottom of the second thinning region is a plane, and the bottoms of the first thinning region and the second thinning region are smoothly connected.

[0013] As one possible implementation, the wire axis is located on the cross-section along the wire axis direction. On the cross-section along the axial direction of the metal wire, there are several arc-shaped segments of the metal wire arranged along the axial direction of the metal wire. The two ends of the arc-shaped segments are located at different heights. The thinned moving blade first contacts the lower end of the arc-shaped segment and then moves towards the upper end of the arc-shaped segment.

[0014] This utility model also provides a metal wire embroidery device, including a wire clamping component and the aforementioned wire cutting component. The wire clamping component is located below the wire cutting component and includes two clamping arms that can be opened and closed. There is a preset distance d1 between the top of the clamping arms and the first lower surface of the blade of the fixed knife, where 0.5mm≤d1≤1.5mm.

[0015] In the above scheme, if the fixed cutting edge includes a first fixed cutting edge and a second fixed cutting edge set at an obtuse angle, and the moving cutting edge is provided with a third moving cutting edge. From a top-down view, the first and second fixed cutting edges form an outwardly convex V-shape, ensuring a smooth cut surface by first sharply cutting in and then firmly cutting off the wire. From a top-down view, the first and second fixed cutting edges form an inwardly concave V-shape. The concave V-shaped first and second fixed cutting edges stably restrict the wire's degrees of freedom, preventing slippage or deformation during shearing, thus contributing to a smooth cut surface. If the fixed cutting edge is provided with a third fixed cutting edge, and the moving cutting edge includes... The device includes a first moving cutting edge and a second moving cutting edge set at an obtuse angle. From a top-down view, the first and second moving cutting edges form an outwardly convex V-shape, which ensures a smooth cut surface of the metal wire segment by first making a sharp cut and then making a steady cut. From a top-down view, the first and second moving cutting edges form an inwardly concave V-shape. The concave V-shaped first and second moving cutting edges can stably restrict the degree of freedom of the metal wire, preventing the metal wire from slipping or deforming at the moment of shearing, which helps to make the cut surface of the metal wire segment smooth. Attached Figure Description

[0016] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Figure 1 Schematic diagram of the metal wire embroidery device provided in the embodiments of this utility model Figure 1 ; Figure 2 Schematic diagram of the metal wire embroidery device provided in the embodiments of this utility model Figure 2 ; Figure 3 This is a schematic diagram showing the positions of the wire cutting assembly and the wire clamping component provided in an embodiment of the present utility model; Figure 4 A top view schematic diagram of the first type of wire-cutting assembly provided in this embodiment of the utility model; Figure 5 This is a top view schematic diagram of the second type of wire-cutting assembly provided in an embodiment of the present utility model; Figure 6 A top view schematic diagram of the third type of wire-cutting assembly provided in this embodiment of the utility model; Figure 7 A top view schematic diagram of the fourth type of wire-cutting assembly provided in this embodiment of the utility model; Figure 8 A schematic diagram of the moving blade structure provided in an embodiment of this utility model; Figure 9 A schematic diagram of the fixed blade structure provided in an embodiment of this utility model; Figure 10This is a schematic diagram of the first type of moving blade shearing metal wire provided in an embodiment of the present utility model; Figure 11 This is a schematic diagram of a second type of moving blade shearing metal wire provided in an embodiment of the present invention; Wire feeding auxiliary assembly 10, wire feeding drive wheel 11, wire feeding driven wheel 12, mounting base 20; Wire cutting assembly 30, moving blade 31, moving blade blade part 311, moving blade edge 3111, third moving blade cutting edge c, second thinning zone 3112, first thinning zone 3113, moving blade mounting part 312; Fixed blade 32, fixed blade cutting edge 321, fixed blade cutting edge 3211, first cutting edge area 32111, second cutting edge area 32112, first fixed blade cutting edge a, second fixed blade cutting edge b, fixed blade mounting part 322; Wire clamping component 40, clamping arm 41. Detailed Implementation

[0017] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the relevant utility model and not intended to limit the scope of the utility model. Furthermore, it should be noted that, for ease of description, only the parts relevant to the utility model are shown in the accompanying drawings.

[0018] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0019] This application provides a metal wire embroidery device for use in a computerized embroidery machine. The metal wire embroidery device can be connected to the machine head, and works in conjunction with the machine head's needle to automatically embroider metal wires. Figure 1 and Figure 2 As shown, the metal wire embroidery device includes a wire feeding auxiliary component 10, a wire cutting component 30, and a wire clamping component 40 arranged sequentially from top to bottom. The wire feeding auxiliary component 10 is used to feed the metal wire to the wire cutting component 30. The wire cutting component 30 is used to cut the metal wire into metal wire segments. The wire clamping component 40 is used to clamp the metal wire segments and transport them to the embroidery position. The wire clamping component 40 cooperates with the needle of the machine head to embroider the metal wire segments onto the fabric, thereby realizing metal wire embroidery.

[0020] In detail, the wire feeding auxiliary assembly 10 includes a wire feeding drive wheel 11 and a wire feeding driven wheel 12. The wire feeding drive wheel 11 and the wire feeding driven wheel 12 can be located at the same height, and their radial dimensions are equal. The side of the wire feeding drive wheel 11 is provided with a first groove adapted to the metal wire, and the first groove is arranged around the axis of the wire feeding drive wheel 11; the side of the wire feeding driven wheel 12 is provided with a second groove adapted to the metal wire, and the second groove is arranged around the axis of the wire feeding driven wheel 12.

[0021] The wire feeding drive wheel 11 and the wire feeding driven wheel 12 are in frictional engagement. The side of the wire feeding drive wheel 11 contacts the side of the wire feeding driven wheel 12. When the wire feeding drive wheel 11 rotates, it drives the wire feeding driven wheel 12 to rotate, thereby driving the metal wire to move toward the wire cutting assembly 30.

[0022] The wire cutting assembly 30 includes a movable blade 31 and a fixed blade 32 that are arranged opposite to each other and spaced apart in the horizontal direction. The movable blade 31 can move closer to or further away from the fixed blade 32 to cut the metal wire into metal wire segments.

[0023] The wire clamping component 40 is capable of moving horizontally and switching between a clamping position and an embroidery position. The wire clamping component 40 includes two clamping arms 41 that can open and close. After the wire is cut, the two clamping arms 41 move closer to each other to clamp the wire segment, and at the current moment, the wire clamping component 40 is in the clamping position. When the wire clamping component 40 switches from the clamping position to the embroidery position, the two clamping arms 41 move further apart to release the wire segment. At the current moment, the needle moves simultaneously to embroider the wire segment onto the fabric.

[0024] In practical applications, when the moving blade 31 approaches the fixed blade 32, the moving blade 31 impacts the metal wire with great force, which may cause the metal wire at the cutting position to be bent. This can result in a slanted or uneven cut surface after cutting, leading to an uneven cut surface on the metal wire segment and affecting the quality of the metal wire embroidery. Based on this, this application proposes a new wire-cutting assembly 30 that can solve the above problems.

[0025] In a first specific embodiment, the fixed blade 32 includes a fixed blade cutting edge portion 321, which includes a first fixed blade cutting edge a and a second fixed blade cutting edge b arranged at an obtuse angle. The moving blade cutting edge portion 311 is provided with a third moving blade cutting edge c. When the moving blade 31 approaches the fixed blade 32, the first fixed blade cutting edge a and the second fixed blade cutting edge b respectively form different acute angles with the third moving blade cutting edge c.

[0026] like Figure 1 As shown, the metal wire embroidery device also includes a mounting base 20, which has an elongated groove for the wire clamping component 40 to move horizontally. The opposite edges of the groove opening extend outward to form a first mounting part and a second mounting part that are arranged opposite to each other. The first mounting part and the second mounting part are respectively located on both sides of the length direction of the groove opening. The fixed blade 32 is fixedly mounted on the first mounting part, and the movable blade 31 is movably mounted on the second mounting part.

[0027] like Figure 9As shown, the fixed blade 32 includes a fixed blade cutting edge 321 and a fixed blade mounting part 322. The fixed blade mounting part 322 is disposed away from the movable blade 31, while the fixed blade cutting edge 321 is disposed close to the movable blade 31. The fixed blade mounting part 322 has an oblong hole, the length of which can extend along the direction from the fixed blade 32 to the movable blade 31. Fasteners pass through the oblong hole and are connected to the first mounting part. In this way, the oblong hole can adjust the mounting position of the fixed blade 32 to be closer to or further away from the movable blade 31.

[0028] like Figure 9 As shown, the fixed cutting edge portion 321 also includes a first upper surface and a first lower surface disposed opposite to each other. A fixed cutting edge 3211 is formed by extending obliquely from the first lower surface to the first upper surface and toward the moving blade 31. The fixed cutting edge 3211 connects the first upper surface and the first lower surface. The fixed cutting edge 3211 includes a first cutting edge region 32111 and a second cutting edge region 32112. The first cutting edge region 32111 intersects with the first upper surface to form a first fixed cutting edge a, and the second cutting edge region 32112 intersects with the first upper surface to form a second fixed cutting edge b.

[0029] like Figure 8 As shown, the moving blade 31 includes a moving blade cutting edge 311 and a moving blade mounting part 312. The moving blade mounting part 312 is disposed away from the fixed blade 32, while the moving blade cutting edge 311 is disposed close to the fixed blade 32. The thickness of the moving blade mounting part 312 is greater than the thickness of the moving blade cutting edge 311. The moving blade mounting part 312 can reciprocate in the direction from the fixed blade 32 to the moving blade 31, thereby allowing the moving blade cutting edge 311 to move closer to or further away from the fixed blade cutting edge 321.

[0030] like Figure 8 As shown, the moving blade portion 311 also includes a second upper surface and a second lower surface disposed opposite to each other. A moving blade 3111 extends obliquely from the second upper surface to the second lower surface and toward the fixed blade 32, connecting the second upper surface and the second lower surface. The moving blade 3111 intersects with the second lower surface to form a third moving cutting edge c.

[0031] Figure 4 This is a top view of the wire-cutting assembly 30. From this top view, the first fixed blade cutting edge a and the second fixed blade cutting edge b form an outwardly convex V-shape. As the moving blade 31 approaches the fixed blade 32, the third moving blade cutting edge c first contacts the first fixed blade cutting edge a to form a first acute angle, and then contacts the second fixed blade cutting edge b to form a second acute angle. The first acute angle is smaller than the second acute angle.

[0032] Because the first acute angle is smaller, under the same pushing force of the moving blade 31, the first shearing component force generated when the third moving blade cutting edge c cooperates with the first fixed blade cutting edge a is greater than the second shearing component force generated when the third moving blade cutting edge c cooperates with the second fixed blade cutting edge b. Under the action of the first shearing component force, the moving blade 31 can more easily cut into the metal wire. The initial cut has already been formed, and cutting off the remaining part does not require a large shearing force. Then, under the action of the second shearing component force, the metal wire can be cut off smoothly. In this way, by first making a sharp cut and then cutting off steadily, a smooth cut surface of the metal wire segment can be ensured.

[0033] In the second specific embodiment, the difference between the second specific embodiment and the first specific embodiment is that: Figure 5 This is a top view of the wire-cutting assembly 30. From this top view, the first fixed blade cutting edge a and the second fixed blade cutting edge b form an inwardly concave V-shape. As the moving blade 31 approaches the fixed blade 32, the third moving blade cutting edge c first contacts the first fixed blade cutting edge a to form a first acute angle, and then contacts the second fixed blade cutting edge b to form a second acute angle. The first acute angle is larger than the second acute angle.

[0034] Before the moving blade 31 begins shearing, the concave V-shaped first fixed blade cutting edge a and second fixed blade cutting edge b can stably restrict the degree of freedom of the metal wire, preventing the metal wire from slipping or deforming at the moment of shearing, which helps to make the cut surface of the metal wire segment flat.

[0035] In the third specific embodiment, the difference between the third specific embodiment and the first specific embodiment is as follows: Figure 6 As shown, the fixed cutting edge 321 is provided with a third fixed cutting edge (as shown by the yellow line in the figure), and the moving cutting edge 311 includes a first moving cutting edge (as shown by the green line in the figure) and a second moving cutting edge (as shown by the red line in the figure) set at an obtuse angle. When the moving cutting edge 31 approaches the fixed cutting edge 32, the first moving cutting edge and the second moving cutting edge form different acute angles with the third fixed cutting edge.

[0036] Figure 6 This is a top view of the wire-cutting assembly 30. From this top view, the first moving blade cutting edge and the second moving blade cutting edge form an outwardly convex V-shape. As the moving blade 31 approaches the fixed blade 32, the third fixed blade cutting edge first contacts the first moving blade cutting edge to form a first acute angle, and then contacts the second moving blade cutting edge to form a second acute angle. The first acute angle is smaller than the second acute angle.

[0037] Because the first acute angle is smaller, under the same pushing force of the moving blade 31, the first shearing component force generated when the third fixed blade cutting edge cooperates with the first moving blade cutting edge is greater than the second shearing component force generated when the third fixed blade cutting edge cooperates with the second moving blade cutting edge. Under the action of the first shearing component force, the moving blade 31 can more easily cut into the metal wire. The initial cut has already been formed, and cutting off the remaining part does not require a large shearing force. Then, under the action of the second shearing component force, the metal wire can be cut off smoothly. In this way, by first making a sharp cut and then cutting off steadily, a smooth cut surface of the metal wire segment can be ensured.

[0038] In the fourth embodiment, the difference between the fourth embodiment and the third embodiment is as follows: Figure 7 This is a top view of the wire-cutting assembly 30. From this top view, the first moving blade cutting edge and the second moving blade cutting edge form an inwardly concave V-shape. As the moving blade 31 approaches the fixed blade 32, the third fixed blade cutting edge first contacts the first moving blade cutting edge to form a first acute angle, and then contacts the second moving blade cutting edge to form a second acute angle. The first acute angle is larger than the second acute angle.

[0039] The concave V-shaped first and second moving cutting edges can stably restrict the degree of freedom of the metal wire, preventing the metal wire from slipping or deforming at the moment of shearing, and helping to make the cut surface of the metal wire segment flat.

[0040] In summary, if the fixed blade cutting edge 321 includes a first fixed cutting edge a and a second fixed cutting edge b set at an obtuse angle, and the moving blade cutting edge 311 is provided with a third moving cutting edge c, then, from a top-down view, the first fixed cutting edge a and the second fixed cutting edge b form an outwardly convex V-shape. This allows for a sharp initial cut followed by a stable severance, ensuring a smooth cut surface for the metal wire segment. From a top-down view, the first fixed cutting edge a and the second fixed cutting edge b form an inwardly concave V-shape. This concave V-shape stably restricts the degree of freedom of the metal wire, preventing slippage or deformation during shearing and contributing to a smooth cut surface. If the fixed blade cutting edge 321 is provided with a third fixed cutting edge, the moving blade... The cutting edge 311 includes a first moving cutting edge and a second moving cutting edge set at an obtuse angle. In a top view, the first moving cutting edge and the second moving cutting edge are outwardly convex V-shaped. By first sharply cutting in and then steadily cutting off, the cut surface of the metal wire segment can be guaranteed to be flat. In a top view, the first moving cutting edge and the second moving cutting edge are inwardly concave V-shaped. The concave V-shaped first moving cutting edge and the second moving cutting edge can stably restrict the degree of freedom of the metal wire, and prevent the metal wire from slipping or deforming at the moment of shearing, which helps to make the cut surface of the metal wire segment flat.

[0041] Preferably, the wire-cutting assembly 30 corresponding to the first and third embodiments. That is, in a top view, the first fixed cutting edge a and the second fixed cutting edge b form an outwardly convex V-shape, and the fixed blade 32 is simple and convenient to process; or, in a top view, the first moving cutting edge and the second moving cutting edge form an outwardly convex V-shape, and the moving blade 31 is simple and convenient to process.

[0042] More preferably, the wire-cutting assembly 30 corresponds to the first specific embodiment. In practical applications, the wear degree of the moving blade 31 is greater than that of the fixed blade 32, requiring periodic replacement of the moving blade 31. To further reduce production costs, a moving blade 31 with a simple structure can be selected.

[0043] The following embodiments are illustrated using a first specific embodiment: Among them, at least the moving blade 3111 is provided with a first thinning zone 3113.

[0044] like Figure 8 As shown, a first thinning region 3113 is provided on a portion of the moving blade 3111, while a second thinning region 3112 is formed by the second upper surface being recessed towards the second lower surface, and the two thinning regions are connected. The bottom of the second thinning region 3112 is flat, and the bottoms of the first thinning region 3113 and the second thinning region 3112 are smoothly connected.

[0045] The first thinning zone 3113 is located locally on the moving blade 3111. The thinned moving blade 3111 becomes sharper, allowing it to cut into the metal wire more smoothly with less force, resulting in a cleaner cut. The second thinning zone 3112 is located on the second upper surface. When the moving blade 3111 cuts into the metal wire, the cut metal chips can enter this second thinning zone 3112 instead of being squeezed between the moving blade 3111 and the metal wire. There are no sharp corners between the bottoms of the first thinning zone 3113 and the second thinning zone 3112; instead, they are smoothly connected. This effectively disperses the stress generated during shearing, greatly improving the structural strength and durability of the moving blade 3111.

[0046] The distance between the second upper surface and the second lower surface is less than or equal to 1.5 mm. The depth of the indentation from the second upper surface to the second lower surface is less than or equal to 0.5 mm. While ensuring the rigidity of the moving blade 3111, the thinned moving blade 3111 is made as sharp as possible.

[0047] Among them, the metal wire axis is located on the cross section in the direction of the metal wire axis. On the cross section in the direction of the metal wire axis, there are several metal wire arc segments arranged along the direction of the metal wire axis. The two ends of the metal wire arc segments are located at different heights. The thinned moving blade 3111 first contacts the lower end of the metal wire arc segment, and then approaches the upper end of the metal wire arc segment.

[0048] like Figure 10 As shown, on the cross-section along the axial direction of the metal wire, there are several arc-shaped segments of the metal wire arranged along the axial direction. If the right end of one of the arc-shaped segments is higher than the left end, the thinned moving blade 3111 cuts the metal wire from left to right; as... Figure 11 As shown, if the left end of the arc-shaped section of the metal wire is higher than the right end, the thinned moving blade 3111 cuts the metal wire from right to left. The blade starts cutting from the lowest point, and as the moving blade 31 continues to advance, the cut steadily expands upward along the contour of the metal wire until it is completely severed. This progressive cutting method minimizes the impact on the metal wire, effectively preventing bending and deformation due to excessive force, and helps to ensure a smooth cut surface for the metal wire section.

[0049] There is a preset distance d1 between the top of the clamping arm 41 and the first lower surface of the fixed blade 321, where 0.5mm≤d1≤1.5mm.

[0050] It should be noted that, as Figure 3 As shown, before the metal wire is cut, there is a preset distance d1 between the top of the clamping arm 41 and the first lower surface. If the preset distance d1 is too large, the metal wire will sway or bend horizontally at the moment the moving blade 31 cuts, causing the metal wire in the cut area to be unable to be set vertically, resulting in an uneven cut position for the metal wire segment. Based on this, this application selects 0.5mm≤d1≤1.5mm. On the one hand, the gap d1 prevents the metal wire from swaying or bending horizontally, which helps to make the cut position of the metal wire segment flat; on the other hand, it avoids interference with the fixed blade 32 during the opening and closing of the clamping arm 41.

[0051] It should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer" used above to indicate orientation or switching positional relationships are based on the orientation or switching positional relationships shown in the accompanying drawings. These are used solely for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "frame" and "layout" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "frame" or "layout" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0052] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the utility model involved in this application is not limited to the technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. A wire-cutting assembly (30), characterized in that, It includes: a moving blade (31) and a fixed blade (32) arranged opposite to each other and spaced apart in the horizontal direction, wherein the moving blade (31) can move closer to or away from the fixed blade (32). The fixed blade (32) includes a fixed blade cutting edge (321), which includes a first fixed blade cutting edge (a) and a second fixed blade cutting edge (b) set at an obtuse angle. The moving blade cutting edge (311) is provided with a third moving blade cutting edge (c). When the moving blade (31) approaches the fixed blade (32), the first fixed blade cutting edge (a) and the second fixed blade cutting edge (b) respectively form different acute angles with the third moving blade cutting edge (c); or, The fixed blade cutting edge (321) is provided with a third fixed blade cutting edge, and the moving blade cutting edge (311) includes a first moving blade cutting edge and a second moving blade cutting edge arranged at an obtuse angle. When the moving blade (31) approaches the fixed blade (32), the first moving blade cutting edge and the second moving blade cutting edge form different acute angles with the third fixed blade cutting edge.

2. The wire-cutting assembly (30) according to claim 1, characterized in that, When the moving blade (31) approaches the fixed blade (32), the cutting edge of the third fixed blade first contacts the cutting edge of the first moving blade to form a first acute angle, and then contacts the cutting edge of the second moving blade to form a second acute angle. The first acute angle is smaller than the second acute angle.

3. The wire-cutting assembly (30) according to claim 1, characterized in that, When the moving blade (31) approaches the fixed blade (32), the third moving blade cutting edge (c) first contacts the first fixed blade cutting edge (a) to form a first acute angle, and then contacts the second fixed blade cutting edge (b) to form a second acute angle. The first acute angle is smaller than the second acute angle.

4. The wire-cutting assembly (30) according to claim 3, characterized in that, The fixed blade (321) further includes a first upper surface and a first lower surface disposed opposite to each other. A fixed blade (3211) extends obliquely from the first lower surface toward the first upper surface and toward the moving blade (31). The fixed blade (3211) connects the first upper surface and the first lower surface. The fixed cutting edge (3211) includes a first cutting edge area (32111) and a second cutting edge area (32112). The first cutting edge area (32111) intersects with the first upper surface to form the first fixed cutting edge (a), and the second cutting edge area (32112) intersects with the first upper surface to form the second fixed cutting edge (b).

5. The wire-cutting assembly (30) according to claim 3, characterized in that, The moving blade (311) further includes a second upper surface and a second lower surface disposed opposite to each other. The moving blade (3111) extends obliquely from the second upper surface to the second lower surface and toward the fixed blade (32). The moving blade (3111) connects the second upper surface and the second lower surface. The moving blade (3111) intersects with the second lower surface to form the third moving blade cutting edge (c).

6. The wire-cutting assembly (30) according to claim 5, characterized in that, At least the moving blade (3111) has a first thinning zone (3113), and the distance between the second upper surface and the second lower surface is less than or equal to 1.5 mm.

7. The wire-cutting assembly (30) according to claim 6, characterized in that, A second thinning region (3112) is formed by recessing from the second upper surface toward the second lower surface, and the second thinning region (3112) is connected to the first thinning region (3113).

8. The wire-cutting assembly (30) according to claim 6, characterized in that, The bottom of the second thinning area (3112) is flat, and the bottom of the first thinning area (3113) and the second thinning area (3112) are smoothly connected.

9. The wire-cutting assembly (30) according to claim 6, characterized in that, The axis of the metal wire is located on the cross-section along the axis of the metal wire. On the cross-section of the metal wire along the axial direction, there are several arc-shaped segments of the metal wire arranged along the axial direction of the metal wire. The two ends of the arc-shaped segments of the metal wire are located at different heights. The thinned moving blade (3111) first contacts the lower end of the arc-shaped metal wire segment, and then moves towards the upper end of the arc-shaped metal wire segment.

10. A metal wire embroidery device, characterized in that, It includes a wire clamp (40) and a wire cutting assembly (30) according to any one of claims 1-9. The wire clamping component (40) is located below the wire cutting assembly (30) and includes two clamping arms (41) that can be opened and closed. There is a preset distance d1 between the top of the clamping arm (41) and the first lower surface of the fixed blade (321) of the fixed blade (32), where 0.5mm≤d1≤1.5mm.

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