Overedger

Abstract

The utility model relates to the technical field of sewing machines, in particular to an overedger which comprises a needle plate, a needle seat, a needle seat, a needle seat and a needle seat, the cloth feeding mechanism pushes the textiles on the cloth placing surface to move on the plane where the cloth placing surface is located; the machine needle is configured in the mode that the machine needle is located at the needle falling point position, and the axis of the machine needle is perpendicular to the cloth placing face; the curved needle assembly comprises an upper curved needle and a lower curved needle which are located on the upper side and the lower side of the needle plate respectively, and the upper curved needle, the lower curved needle and the machine needle move relative to the needle plate in stitches needing to be formed. The overedger prevents the lateral force from bending or breaking the machine needle, improves the sewing efficiency and the sewing quality, and is particularly suitable for sewing thicker or harder textiles.

Description

Technical Field

[0001] The present application relates to the technical field of sewing machines, and in particular to an overlock sewing machine. Background Art

[0002] See also Figure 1 The overlock sewing machine 100 generally includes a needle plate 110, a needle 120 disposed above the needle plate 110, and an upper looper 130 and a lower looper 140 located on the upper and lower sides of the needle plate 110. During sewing, the needle 120, the upper looper 130, and the lower looper 140 each carry a suture and move according to a specific rule, so that the sutures are intertwined with each other to form the stitches required for sewing. During sewing, in order to ensure that the needle tips of the upper looper 130 and the lower looper 140 move on the vertical plane of the cloth placing surface 111 of their respective needle plates 110, and because the needle 120 needs to not intertwine with the upper looper 130 and the lower looper 140 at the same time, the needle 120 is generally configured in the prior art as follows: the needle 120 is tilted relative to the cloth placing surface 111 of the needle plate 110, and the angle α formed between the two is an acute angle. Therefore, when the needle 120 sews, the two form an acute angle movement.

[0003] Since the needle 120 of the overlock sewing machine 100 moves at an acute angle to the cloth-laying surface 111, the needle 120 also moves at an acute angle relative to the textile on the cloth-laying surface 111 during sewing. Figure 2 When the needle 120 reaches the needle drop point, the needle tip of the needle 120 is subjected to a relative force F1 perpendicular to the textile 200. This relative force F1 forms an acute angle α with the axis XX of the needle 120. During sewing, this relative force F1 acts on the needle 120 to form a lateral force F1 acting on the needle 120. Moreover, this lateral force F1 increases with the thickness and hardness of the textile 200. Thus, when the overlock sewing machine 100 is sewing thicker or harder textiles 200, the needle tip of the needle 120 is easily bent or even broken. Currently, the existing technology uses replacement of the needle 120 to ensure smooth sewing. However, replacement of the needle 120 will affect sewing efficiency and sewing quality. Utility Model Content

[0004] Based on this, it is necessary to provide an overlock sewing machine that can improve sewing efficiency and sewing quality.

[0005] In order to solve the above technical problems, the present application provides the following technical solutions: an overlock sewing machine, comprising:

[0006] A needle plate having a cloth placing surface for placing textiles;

[0007] A cloth feeding mechanism pushes the textiles on the cloth placing surface to move on the plane where the cloth placing surface is located;

[0008] A sewing needle, wherein the sewing needle is configured so that when the sewing needle is at a needle drop point, the axis of the sewing needle is perpendicular to the cloth placing surface; and

[0009] The looper assembly comprises an upper looper and a lower looper respectively located on the upper and lower sides of the needle plate. The upper looper, the lower looper and the machine needle move relative to the needle plate within the stitch to be formed.

[0010] In one embodiment, the cloth placing surface is arranged to be inclined relative to the horizontal plane, and the angle formed between the cloth placing surface and the horizontal plane is an acute angle.

[0011] In this way, the position of the needle does not need to be changed, and the adjustment of the entire machine layout is minimized.

[0012] In one embodiment, the inclination direction of the cloth placing surface relative to the horizontal plane is consistent with the cloth feeding direction of the cloth feeding mechanism.

[0013] This will facilitate the movement of the fabric and help improve the smoothness of the sewing work.

[0014] In one embodiment, the overlock sewing machine further includes a supporting structure, which supports the needle plate so that the cloth placing surface is tilted relative to the horizontal plane.

[0015] It can be understood that the cloth placing surface is set to be arranged in an inclined manner through the support structure, which has a simple structure and is easy to implement.

[0016] In one embodiment, the support structure includes at least two support legs, and the extension direction of the support legs is perpendicular to the cloth placement surface.

[0017] This arrangement allows the side surfaces of the support legs to be located in the same plane as the side surfaces of the needle plate as much as possible, thus reducing interference during sewing.

[0018] In one embodiment, the support structure is configured to enable the needle plate to flip in a front-to-back direction with the needle drop point as the axis.

[0019] With this setting, the position of the needle plate can be adjusted according to sewing needs, thereby improving the applicability of the overlock sewing machine.

[0020] The needle plate is configured to switch between a first position and a second position, wherein

[0021] The needle plate is in the first position, the cloth placing surface is inclined relative to the horizontal plane, and the needle is at the needle drop point, with the axis of the needle perpendicular to the cloth placing surface;

[0022] The needle plate is in the second position, the cloth placing surface is parallel to the horizontal plane, and the needle is at the needle drop point, and an acute angle is formed between the axis of the needle and the cloth placing surface.

[0023] It can be understood that when the needle plate is configured in the first position, the needle can be prevented from bending or breaking when sewing thicker or harder textiles, and when the needle plate is configured in the second position, the user comfort during sewing can be improved.

[0024] The supporting structure includes a telescopic member supporting the needle plate; or;

[0025] The supporting structure includes a telescopic component supporting the needle plate and a power source driving the telescopic component to expand or contract; or,

[0026] The support structure includes a plurality of support legs of different heights, and the plurality of support legs are optionally installed below the needle.

[0027] In this way, the position of the needle plate can be adjusted to adapt the overlock sewing machine to different usage requirements.

[0028] In one embodiment, the cloth placing surface is parallel to the horizontal plane.

[0029] It can be understood that by arranging the cloth placing surface to be horizontal, sewing operation is facilitated.

[0030] In one embodiment, the overlock sewing machine further includes a needle driving mechanism, which drives the needle to move away from or closer to the needle plate along the direction of the axis.

[0031] It can be understood that when the needle is driven by the driving mechanism to move only along the axis direction, it has only one movement direction, thereby ensuring the stability of the needle during the sewing process.

[0032] Compared with the prior art, the overlock sewing machine of the present application configures the needle so that the needle is at the needle drop point with the axis of the needle perpendicular to the cloth surface, so that the needle penetrates the textile vertically when the needle drops, thereby reducing or even eliminating the lateral force of the textile acting on the needle during sewing, preventing the lateral force from causing the needle to bend or break, and improving sewing efficiency and sewing quality.

[0033] Since the force acting on textiles increases with the thickness and hardness of the textiles, the present application avoids the influence of the thickness and hardness of the textiles on sewing by reducing or eliminating the lateral force, making the overlock sewing machine of the present application particularly suitable for sewing thicker or harder textiles. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the conventional technology, the following briefly introduces the drawings required for use in the embodiments or the conventional technology descriptions. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0035] Figure 1 It is a partial structural diagram of an overlock sewing machine of the prior art;

[0036] Figure 2 This is a schematic diagram of the force exerted on the textile by the needle when the needle is at the needle drop point in the prior art;

[0037] Figure 3 A schematic structural diagram of an overlock sewing machine provided in one embodiment of the present application;

[0038] Figure 4 for Figure 3 A partial structural diagram of an overlock sewing machine is shown;

[0039] Figure 5 for Figure 4 The schematic diagram of the structure of the overlock sewing machine shown is from another perspective;

[0040] Figure 6 This is a schematic diagram of the force exerted on the textile when the needle of the present application is at the needle drop point;

[0041] Figure 7 Schematic diagram of a support structure shown in an embodiment of the present application.

[0042] The reference numerals of the various components are as follows:

[0043] 100, overlock sewing machine; 110, needle plate; 111, cloth placement; 120, needle; 140, lower looper;

[0044] 300, overlock sewing machine; 310, machine head; 311, machine base; 312, needle plate; 3121, cloth placement surface; 3122, needle drop hole; 3123, rear side; 313, needle; 314, feed dog assembly; 130, upper looper; 315, upper looper; 316, lower looper; 317, supporting leg; 3171, first tube; 3172, second tube; 3173, opening; 200, textile. DETAILED DESCRIPTION

[0045] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0046] It should be noted that when a component is referred to as being "fixed to" or "disposed on" another component, it may be directly on the other component or there may be a central component. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may be a central component at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in the specification of this application are for illustrative purposes only and do not represent the only implementation method.

[0047] 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 the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. Throughout the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0048] In this application, unless otherwise expressly specified or limited, a first feature being “above” or “below” a second feature may mean that the first feature is directly in contact with the second feature, or that the first feature and the second feature are indirectly in contact through an intermediate medium. Furthermore, a first feature being “above,” “above,” or “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below,” “below,” or “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0049] Unless otherwise defined, all technical and scientific terms used in the specification of this application have the same meaning as commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used in the specification of this application includes any and all combinations of one or more of the relevant listed items.

[0050] See also Figures 3 to 5The present application provides a sewing machine 300, which is a machine for sewing textile hems, and includes a machine head 310, a tripod (not shown) supporting the machine head 310, and a table (not shown) driving the machine head 310. The machine head 310 mainly includes a machine base 311, a needle plate 312, a cloth feeding mechanism, a needle 313, a looper assembly, a needle driving mechanism (not numbered), and a looper driving mechanism (not numbered). The sewing machine 300 is usually placed on the ground when in use, such as Figure 3 As shown, the ground is generally parallel to the horizontal plane, which can also be referred to as a horizontal plane. During operation, the operator is located on one side of the needle plate 312. The subsequent description is based on the direction of the overlock sewing machine in use as the reference perspective, where arrows a1 and a2 indicate the front and rear directions, respectively, and arrows b1 and b2 indicate the left and right directions, respectively.

[0051] The needle plate 312 is mounted on the machine base 311. The needle plate 312 has a cloth placement surface 3121 for placing textiles (not shown). During sewing, the needle plate 312 is stationary relative to the machine base 311. The cloth feeding mechanism is used to push the textiles on the cloth placement surface 3121 to move on the plane where the cloth placement surface 3121 is located. The cloth feeding mechanism generally includes a feed dog assembly 314 and a cloth pressing assembly (not shown). The feed dog assembly 314 and the cloth pressing assembly can adopt existing technology and are not described in detail here. In this embodiment, there are two needles 313, and the following description will mainly focus on the right needle. The two needles 313 are mounted on the machine base 311. When not in operation, they are usually suspended above the needle plate 312. The bending needle assembly includes an upper bending needle 315 and a lower bending needle 316 located on the upper and lower sides of the needle plate 312, respectively.

[0052] The needle drive mechanism and the looper drive mechanism drive the needle 313, the upper looper 315 and the lower looper 316 to operate respectively. During sewing, the upper looper 315, the lower looper 316 and the needle 313 move relative to the needle plate 312 within the stitch to be formed. In this embodiment, the needle drive mechanism drives the needle 313 away from or close to the needle plate 312 in the direction of the axis xx. The main movement route of the needle 313 is: the needle 313 moves from the top of the needle plate 312 (starting position) toward the needle plate 312, penetrates the needle hole 3122 on the needle plate 312, and then moves in the opposite direction and returns to the starting position. In the above-mentioned movement route of the needle 313, before the needle 313 penetrates the needle hole 3122, the needle 313 will first penetrate the textile on the cloth placement surface 3121. The point where the needle 313 contacts the textile is called the needle drop point. The needle 313 is configured so that when the needle 313 is at the needle drop point, the axis line xx of the needle 313 is perpendicular to the cloth surface 3121.

[0053] It should be noted that in the description of "the axis xx of the needle 313 is perpendicular to the cloth placement surface 3121," the term "perpendicular" does not necessarily mean absolutely perpendicular; it includes approximately perpendicular. For example, the angle β formed between the axis xx of the needle 313 and the cloth placement surface 3121 is between 80° and 100°. Similarly, the term "parallel" described later does not necessarily mean absolutely parallel; it also includes approximately parallel.

[0054] The above-mentioned overlock sewing machine 300 configures the needle 313 so that the axis xx of the needle 313 is perpendicular to the cloth surface 3121 at the needle drop point, so that the needle 313 vertically penetrates the textile when the needle drops, thereby reducing or even eliminating the lateral force of the textile on the needle 313 during sewing, thereby preventing the lateral force from causing the needle 313 to bend or break. For details, for example, please refer to Figure 6 The angle β formed between the axis xx of the needle 313 and the cloth placement surface 3121 is 90°. When the needle 313 reaches the needle drop point, the needle 313 is subjected to the relative force F2 of the textile 200. Since the needle 313 is perpendicular to the textile 200, the relative force F2 it is subjected to is also perpendicular to the textile 200. The relative force F2 is parallel to the axis xx of the needle 313, so no lateral force acts on the needle 313.

[0055] Since the force acting on the textile 200 increases with the thickness and hardness of the textile 200, the above solution reduces or eliminates the lateral force, thereby avoiding the influence of the thickness and hardness of the textile 200 on sewing, making the above-mentioned overlock sewing machine 300 particularly suitable for sewing thicker or harder textiles.

[0056] As described in the background art, in the prior art, the needle 313 is tilted relative to the cloth placing surface 3121. In the prior art, since the cloth placing surface 3121 is parallel to the horizontal plane, the needle 313 is tilted relative to the horizontal plane.

[0057] In order to achieve the needle 313 at the needle drop point, the axis xx of the needle 313 is perpendicular to the cloth placing surface 3121. In this embodiment, the cloth placing surface 3121 is arranged tilted compared to the horizontal plane, and the angle formed between the cloth placing surface 3121 and the horizontal plane is an acute angle.

[0058] In an optional embodiment, the inclination direction of the cloth placing surface 3121 compared to the horizontal plane is consistent with the cloth feeding direction of the cloth feeding mechanism, specifically: the angle formed by the axis xx of the needle 313 compared to the horizontal plane is set to 70°, and the angle formed between the cloth placing surface 3121 and the horizontal plane is set to 20°. In this angle setting, the angle between the needle 313 and the horizontal plane adopts the existing arrangement, so only the position of the cloth placing surface 3121 needs to be changed. Since the arrangement of the needle 313 follows the existing technology, the corresponding positions of the upper and lower loopers 315 and 316 can also follow the existing technology without adjustment. Therefore, this arrangement in this embodiment can minimize the adjustment of the overall layout of the machine, and facilitate the improvement and implementation of the existing technology.

[0059] Furthermore, by setting the inclination direction of the cloth placing surface 3121 to be consistent with the cloth feeding direction, the movement of the cloth is facilitated, thereby helping to improve the smoothness of the sewing work. Of course, in other embodiments, the angle between the needle 313 and the horizontal plane, and the angle between the cloth placing surface 3121 and the horizontal plane can also be set according to actual needs.

[0060] It should be noted that the needle plate 312 used in this embodiment adopts the existing needle plate 312 structure, and its main working area is a plate-like structure of approximately equal thickness. The cloth placement surface 3121 is the upper surface of the needle plate 312. Of course, in other embodiments, the needle plate 312 can also be a plate-like structure of unequal thickness.

[0061] In view of the above-mentioned structure of the needle plate 312, in order to make the cloth placing surface 3121 arranged at an angle compared to the horizontal plane, in an optional embodiment, the overlock sewing machine 300 also includes a support structure, which supports the needle plate 312 so that the cloth placing surface 3121 is arranged at an angle compared to the horizontal plane. Specifically, the support structure includes two support legs 317, and the two support legs 317 are relatively arranged on both sides of the needle plate 312. In one embodiment, the extension direction of the two support legs 317 is perpendicular to the cloth placing surface 3121, so that the side surfaces of the support legs 317 are as close as possible to the same plane as the rear side surface 3123 of the needle plate 312 to reduce interference during sewing. In other embodiments, the number of support legs 317 can also be set according to actual conditions. Supporting the needle plate 312 through the support structure makes the overall structure simple and easy to implement.

[0062] In the above embodiment, the needle plate 312 supported by the support legs 317 cannot be adjusted. In another alternative embodiment, the support structure can be configured to allow the needle plate 312 to flip forward and backward about the needle drop point. This arrangement allows the needle plate 312 to be adjusted according to sewing needs, improving the applicability of the overlock sewing machine 300.

[0063] Since the relative force exerted by the textile on the needle 313 increases with the thickness and hardness of the textile, in this optional embodiment, a data table can be set to associate the angle between the axis xx of the needle 313 and the cloth placement surface 3121 with the corresponding thickness and hardness of the textile. Thus, before weaving, a suitable angle can be selected based on the thickness and hardness of the textile. Of course, in an easy-to-operate implementation, the angle between the axis xx of the needle 313 and the cloth placement surface 3121 can be set to only two types: the first is the 70° angle used in the prior art, and the second is the 90° angle described above.

[0064] In the above-mentioned optional embodiment, the needle plate 312 is configured to switch between a first position and a second position, wherein the needle plate 312 is in the first position, the cloth placing surface 3121 is inclined compared to the horizontal plane, and the needle 313 is at the needle drop point, and the axis xx of the needle 313 is perpendicular to the cloth placing surface 3121 (that is, the angle β formed between the axis xx of the needle 313 and the cloth placing surface 3121 is 90°); the needle plate 312 is in the second position, the cloth placing surface 3121 is parallel to the horizontal plane, and the needle 313 is at the needle drop point, and the angle formed between the axis xx of the needle 313 and the cloth placing surface 3121 is 70°. Through this setting, the textile requirements of existing textiles can be met, wherein, when the needle plate 312 is configured to the first position, the overlock sewing machine 300 is suitable for sewing thicker or harder textiles; when the needle plate 312 is configured to the second position, it is suitable for sewing conventional textiles. The needle plate 312 is parallel to the horizontal plane, and it is more convenient for the operator to move the textile horizontally during operation. Therefore, when the needle plate 312 is configured to the second position, it is easier to operate, which helps to improve the user comfort during sewing.

[0065] In order to enable the needle plate 312 to flip in the front-to-back direction along the needle drop point as the axis, this can be achieved by adjusting the support structure or replacing the support structure. Specifically, the following three optional implementation schemes can be adopted.

[0066] Option 1: the support structure is adjusted manually, for example, the support structure includes a telescopic member supporting the needle plate 312, and the telescopic member can be a telescopic leg. Figure 7 The telescopic member includes a first tube 3171 and a second tube 3172, which are sleeved together. The first tube 3171 is fixed to the base 311, and the second tube 3172 is fixed below the needle plate 312. The first tube 3171 and the second tube 3172 can move relative to each other along their axes. The first tube 3171 and the second tube 3172 are respectively provided with a plurality of openings 3173, which extend along the axis of the telescopic member. The first tube 3171 and the second tube 3172 are locked by installing fasteners (not shown) in the overlapping openings 3173.

[0067] Option 2 is an option in which the support structure is adjusted by electrical control. Specifically, the support structure includes a telescopic component supporting the needle plate and a motor driving the telescopic component to expand or contract, such as an electric lifting rod in the prior art.

[0068] Option three is to adjust the position of the needle plate 312 by replacing the support structure. Specifically, the support structure includes a plurality of support legs 317 of different heights, which are optionally installed under the needle 313. The plurality of support legs 317 are used in pairs.

[0069] Of course, in addition to the above-mentioned solutions, other conceivable implementation schemes can also be adopted, such as a support structure that is a pull rod cylinder. By setting the support structure as an adjustable structure or a replaceable structure, the position adjustment of the needle plate 312 can be achieved, so that the overlock sewing machine 300 can adapt to different usage requirements.

[0070] To ensure that the axis xx of the needle 313 is perpendicular to the fabric placement surface 3121 at the needle drop point, this application also provides an alternative embodiment, specifically: the fabric placement surface 3121 is arranged parallel to the horizontal plane, and the angle of the needle 313 is adjusted so that the axis xx of the needle 313 is also perpendicular to the horizontal plane. Compared to the prior art, the position of the fabric placement surface 3121 does not need to be changed. In this embodiment, since the fabric placement surface 3121 is parallel to the horizontal plane, it is arranged horizontally, which facilitates sewing operations.

[0071] It should be noted that, regardless of whether the cloth placement surface 3121 is arranged at an angle or parallel to the horizontal plane, the needle 313 moves along the direction of the axis xx. In an optional embodiment, the movement path of the needle 313 can only move along the direction of the axis xx. When the needle 313 is driven by the drive mechanism to move only along the direction of the axis xx, it has only one movement direction, thereby ensuring the stability of the needle 313 during the sewing process. In another optional embodiment, the needle moves in other directions in addition to moving along the axis xx. The movement path and control method of the needle 313 adopt existing technologies and are not described in detail here.

[0072] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, 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.

[0073] The above embodiments merely illustrate several implementation methods of the present application. 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 a person skilled in the art could make various modifications and improvements without departing from the spirit of the present application, all of which fall within the scope of protection of the present application. Therefore, the scope of patent protection for the present application shall be determined by the appended claims.

Claims

1. An overlock sewing machine, characterized in that: include: A needle plate having a cloth placing surface for placing textiles; A cloth feeding mechanism pushes the textiles on the cloth placing surface to move on the plane where the cloth placing surface is located; A sewing needle, wherein the sewing needle is configured so that when the sewing needle is at a needle drop point, the axis of the sewing needle is perpendicular to the cloth placing surface; and The looper assembly comprises an upper looper and a lower looper respectively located on the upper and lower sides of the needle plate. The upper looper, the lower looper and the machine needle move relative to the needle plate within the stitch to be formed.

2. The overlock sewing machine according to claim 1, characterized in that: The cloth placing surface is arranged tilted compared to the horizontal plane, and the angle formed between the cloth placing surface and the horizontal plane is an acute angle.

3. The overlock sewing machine according to claim 2, characterized in that: The inclination direction of the cloth placing surface compared to the horizontal plane is consistent with the cloth feeding direction of the cloth feeding mechanism.

4. The overlock sewing machine according to claim 2, characterized in that: The overlock sewing machine further includes a supporting structure, which supports the needle plate so that the cloth placing surface is arranged tilted compared to the horizontal plane.

5. The overlock sewing machine according to claim 4, characterized in that: The supporting structure includes at least two supporting legs, and the extending direction of the supporting legs is perpendicular to the cloth placing surface.

6. The overlock sewing machine according to claim 4, characterized in that: The supporting structure is configured to enable the needle plate to flip in a front-to-back direction with the needle drop point as an axis.

7. The overlock sewing machine according to claim 6, characterized in that: The needle plate is configured to switch between a first position and a second position, wherein The needle plate is in the first position, the cloth placing surface is inclined relative to the horizontal plane, and the needle is at the needle drop point, with the axis of the needle perpendicular to the cloth placing surface; The needle plate is in the second position, the cloth placing surface is parallel to the horizontal plane, and the needle is at the needle drop point, and an acute angle is formed between the axis of the needle and the cloth placing surface.

8. The overlock sewing machine according to claim 6, characterized in that: The supporting structure includes a telescopic member supporting the needle plate; or; The supporting structure includes a telescopic assembly supporting the needle plate and a power source driving the telescopic assembly; or, The support structure includes a plurality of support legs of different heights, and the plurality of support legs are optionally installed below the needle.

9. The overlock sewing machine according to claim 1, characterized in that: The cloth placing surface is parallel to the horizontal plane.

10. The overlock sewing machine according to any one of claims 1 to 9, characterized in that: The overlock sewing machine further comprises a needle driving mechanism, which drives the needle to move away from or approach the needle plate along the direction of the axis.

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