阅读说明：本技术 一种在薄形面料上车缝曲折装饰线迹的方法及模板组 (Method for sewing zigzag decorative stitch on thin fabric and template group ) 是由 李飞跃 于 2020-11-30 设计创作，主要内容包括：本发明公开了一种在薄形面料上车缝曲折装饰线迹的方法及模板组,涉及一种服装加工技术领域,一种在薄形面料上车缝曲折装饰线迹的模板组包括上盖板、下盖板、转轴、针板和辅助箱,所述上盖板和下盖板通过转轴转动安装在一起,同时上盖板的底壁内开设有矩形下凹槽,并且下盖板的顶壁上开设有矩形上凹槽,通过下凹槽和上凹槽扣合在一起形成安装腔室,用来安装面料,并且上盖板的内部开设有矩形上通孔,并且下盖板的内部开设有矩形下通孔,其中上通孔配套设置有辅助箱,辅助箱焊接在针板的针槽内,针板选用常规结构的曲折缝纫机针板,并且辅助箱的底部从针板的底部伸出,通过辅助箱对针板进行定位,沿着上通孔进行滑动,完成对面料曲折线的车缝。(The invention discloses a method for sewing zigzag decorative stitch on a thin fabric and a template set, relating to the technical field of garment processing, wherein the template set for sewing zigzag decorative stitch on the thin fabric comprises an upper cover plate, a lower cover plate, a rotating shaft, a needle plate and an auxiliary box, the upper cover plate and the lower cover plate are rotatably installed together through the rotating shaft, meanwhile, a rectangular lower groove is arranged in the bottom wall of the upper cover plate, a rectangular upper groove is arranged on the top wall of the lower cover plate, an installation chamber is formed by buckling the lower groove and the upper groove together for installing the fabric, a rectangular upper through hole is arranged in the upper cover plate, a rectangular lower through hole is arranged in the lower cover plate, the auxiliary box is arranged in a matching way and is welded in a needle groove of the needle plate, the needle plate is a zigzag sewing machine needle plate with a conventional structure, and the bottom of the auxiliary box extends out from the bottom of the needle plate, the needle plate is positioned through the auxiliary box and slides along the upper through hole, and sewing of the fabric zigzag line is completed.)

1. The utility model provides a template group of zigzag decorative stitch seam on thin shape surface fabric, includes upper cover plate (1), lower apron (2), pivot (3), faller (9) and auxiliary box (10), its characterized in that: the upper cover plate (1) and the lower cover plate (2) are rotatably mounted together through a rotating shaft (3), the upper cover plate (1) and the lower cover plate (2) can rotate 90 degrees around the rotating shaft (3), meanwhile, a rectangular lower groove (4) is formed in the bottom wall of the upper cover plate (1), a rectangular upper groove (5) is formed in the top wall of the lower cover plate (1), the size of the upper groove (5) is the same as that of the lower groove (4), a mounting chamber is formed by buckling the lower groove (4) and the upper groove (5) together, the mounting chamber is used for mounting fabric (6), a rectangular upper through hole (7) is formed in the upper cover plate (1), a rectangular lower through hole (8) is formed in the lower cover plate (2), the lower through hole (8) and the upper through hole (7) are symmetrically arranged, an auxiliary box (10) is arranged in a matching manner with the upper through hole (7), and the auxiliary box (10) is welded in a needle groove of a needle plate (, and the bottom of the auxiliary box (10) extends out of the bottom of the needle plate (9), a plurality of pressing mechanisms are fixedly mounted on the bottom walls of the upper groove (4) and the lower groove (5), and the pressing mechanisms are used for pressing the fabric (6).

2. The set of templates for sewing zigzag decorative stitches on a thin fabric as claimed in claim 1, wherein: the pressing mechanism comprises a pressing plate (12), a pressing spring (14), a pressing rod (16) and a tensioning spring (20), wherein a telescopic rod (13) is fixedly installed on the top wall of the pressing plate (12), the other end of the telescopic rod (13) is fixedly installed on the bottom wall of a top plate (15), the top plate (15) is fixedly installed on the bottom wall of a groove, the pressing spring (14) is wound outside the telescopic rod (13), two ends of the pressing spring (14) are respectively installed on the side walls of the pressing plate (12) and the top plate (15), the pressing rod (16) is arranged at the top of the pressing plate (12), the bottom of the pressing rod (16) is rotatably installed on the top of the pressing plate (12) through a rotating seat (19), the top of the pressing rod (16) is rotatably installed at the top end of a sliding seat (17), the sliding seat (17) is slidably installed at the bottom of a sliding rail I (18), and the sliding rail I (18, meanwhile, one end, far away from the telescopic rod (13), of the sliding seat (17) is fixedly provided with a tensioning spring (20), the other end of the tensioning spring (20) is fixedly arranged on the side wall of the side plate (21), and the side plate (21) is fixedly arranged on the left side wall and the right side wall of the top plate (15).

3. The set of templates for sewing zigzag decorative stitches on a thin fabric as claimed in claim 1, wherein: one side of the upper cover plate (1) and the lower cover plate (2) far away from the rotating shaft (3) is provided with a locking mechanism, the locking mechanism comprises a connecting rod (24) and an insert rod (28), the right side end of the upper cover plate (1) is provided with a vertical hole (23), the connecting rod (24) is arranged in the vertical hole (23) in a sliding manner, a mounting groove (25) is arranged on the top wall of the right side of the lower cover plate (2), the mounting groove (25) is positioned under the vertical hole (23), the size of the mounting groove (25) is the same as that of the connecting rod (24), a side groove (26) is arranged on the side wall of the bottom of the connecting rod (24), a sliding hole (27) is formed in the right side wall of the mounting groove (25), the insert rod (28) is arranged in the sliding hole (27) in a sliding manner, the right end of the insert rod (28) extends out of the sliding hole (27), one side wall of the pulling plate (29) close to the lower cover plate (2) is provided with two insertion springs (30), the other ends of the insertion springs (30) are fixedly installed on the side wall of the lower cover plate (2), the two insertion springs (30) are symmetrically arranged relative to the insertion rod (28), and meanwhile the bottom wall of the installation groove (25) is fixedly provided with a jacking spring (31).

4. The set of templates for sewing zigzag decorative stitches on a thin fabric as claimed in claim 3, wherein: two pairs of limiting grooves (32) are formed in the side wall of the bottom of the vertical hole (23), a pair of limiting blocks (33) are fixedly mounted on the left side wall and the right side wall of the connecting rod (24), the limiting blocks (33) are slidably mounted in the limiting grooves (32), and meanwhile a circular plate (34) is fixedly mounted at the top of the connecting rod (24).

5. The set of templates for sewing zigzag decorative stitches on a thin fabric as claimed in claim 1, wherein: the utility model discloses a needle bar structure, including the top of auxiliary tank (10), set up welding groove (36) in the lateral wall all around at the top of auxiliary tank (10), auxiliary tank (10) are in the pinhole of faller (9) through welding groove (36) welding, two pairs of rolling grooves (38) have been seted up to the left and right sides wall internal symmetry of auxiliary tank (10) simultaneously, horizontal gyro wheel (39) are installed to rolling groove (38) internal rotation, auxiliary tank (10) are in last through-hole (7) lateral wall through horizontal gyro wheel (39) rolling contact, and a pair of bracing piece (40) are installed to the left and right sides wall bottom symmetry of auxiliary tank (10), the bottom of bracing piece (40).

6. The set of templates for sewing zigzag decorative stitches on a thin fabric as claimed in claim 5, wherein: the top of the auxiliary box (10) is provided with a square hole (43), two pairs of clamping plates (44) are arranged inside the square hole (43), the left side and the right side of the square hole (43) are symmetrically provided with a pair of sliding grooves (45), the left side and the right side of each clamping plate (44) are slidably mounted in the corresponding sliding grooves (45), a screw rod (42) is rotatably mounted in one side wall of each clamping plate (44) which deviates from each other, the screw rod (42) extends out of the side wall of the square hole (43), the clamping plates (44) are controlled by the screw rod (42) to horizontally slide along the corresponding sliding grooves (45), a sliding rail II (46) is fixedly mounted in one side wall of each clamping plate (44) which is close to each other, a sliding block (47) is slidably mounted in the corresponding sliding rail II (46), a pair of clamping plates (48) is symmetrically mounted in one side wall of each sliding block (47), used for clamping the needle (49), and an anti-collision plate (50) is fixedly arranged on the top wall of the clamping plate (48).

7. The set of templates for sewing zigzag decorative stitches on a thin fabric as claimed in claim 5, wherein: blind groove (51) have been seted up to the diapire of bracing piece (40), the slidable mounting of blind groove (51) has slide cartridge (52), fixed mounting has down pressure spring (53) on the roof of slide cartridge (52), the other end fixed mounting of pushing down pressure spring (53) is on the roof of blind groove (51), fixed mounting has installation piece (54) on the diapire of slide cartridge (52) simultaneously, pivot (55) are installed in the internal rotation of installation piece (54), both ends fixed mounting has perpendicular gyro wheel (41) about pivot (55).

8. The set of templates for sewing zigzag decorative stitches on a thin fabric as claimed in claim 1, wherein: and an anti-skid plate (22) is fixedly arranged on the bottom wall of the pressing plate (12).

9. The set of templates for sewing zigzag decorative stitches on a thin fabric as claimed in claim 2, wherein: step grooves (35) are formed in two sides of the top of the upper through hole (7), a pair of butt straps (37) are symmetrically mounted on the left side wall and the right side wall of the auxiliary box (10), the size of each butt strap (37) is identical to that of each step groove (35), and the auxiliary box (10) is placed on the top wall of each step groove (35) through the butt straps (37).

10. A method of sewing a zigzag decorative stitch on a thin fabric as claimed in any one of claims 1 to 9, wherein:

the method comprises the following steps: firstly, an auxiliary box (10) is welded in a needle cylinder of a needle plate (9) through a welding groove (36), a needle head (49) extends between two clamping plates (48), an operator adjusts a screw rod (42), and the clamping plates (48) are in sliding contact with the side wall of the needle head (49) to complete the installation of the needle head (49);

step two: clamping the processed fabric (6) between the upper groove (4) and the lower groove (5), and fixing the upper cover plate (1) and the lower cover plate (2) through a locking mechanism to finish the fixing of the processed fabric;

step three: the auxiliary box (10) is fixedly arranged in the upper through hole (7) through the attachment strap (37), the zigzag sewing machine is started, the template is pushed forward to carry out sewing operation of zigzag lines, after sewing is finished, the pull plate (29) is pulled, the upper cover plate (1) can be opened, and then the processed fabric (6) is taken out from the lower groove (5).

Technical Field

The invention relates to the technical field of garment processing, in particular to a method for sewing zigzag decorative stitches on a thin fabric and a template set.

Background

The clothing refers to the general term of clothes, shoes, bags, toy ornaments and the like, and is a plurality of clothes. Clothing has emerged in the early stages of human society development, and ancient people made various materials found at their sides into rough "clothing" for body protection. The clothing has three functions of health care, decoration and industrial application, along with the development of the society, people pay more and more attention to the decoration function of the clothing, so that different patterns need to be processed on fabrics in the clothing production process, and the existing clothing production process has a zigzag decoration line process and is usually produced by a common sewing machine. However, the quality problem of the silk type thin fabric that the whole is easily twisted due to the light and thin texture and the smoothness is easily caused when the zigzag stitches are made, and the processing needs to be carried out by an operator in a hand-held manner, so that the thin fabric can be made by high-grade workers with very good technology, the production efficiency of the thin fabric is low, the manufacturing cost is high, and the economic benefit is poor.

Disclosure of Invention

Aiming at the problems in the prior art, the invention aims to provide a method for sewing zigzag decorative stitches on a thin fabric and a template set.

In order to achieve the purpose, the invention provides the following technical scheme: a template group for sewing zigzag decorative stitches on a thin fabric comprises an upper cover plate, a lower cover plate, a rotating shaft, a needle plate and an auxiliary box, wherein the left side walls of the upper cover plate and the lower cover plate are rotatably installed together through the rotating shaft, the upper cover plate and the lower cover plate can rotate 90 degrees around the rotating shaft, a rectangular lower groove is formed in the bottom wall of the upper cover plate, a rectangular upper groove is formed in the top wall of the lower cover plate, the size of the upper groove is the same as that of the lower groove, the lower groove and the upper groove are buckled together to form an installation cavity for installing the fabric, a rectangular upper through hole is formed in the upper cover plate, a rectangular lower through hole is formed in the lower cover plate, the lower through hole and the upper through hole are symmetrically arranged, the auxiliary box is arranged in a matched manner in the upper through hole, the auxiliary box is welded in the needle groove of the needle plate, the bottom of the auxiliary box extends out of the bottom of the needle plate, and a, the pressing mechanism presses the fabric.

As a further scheme of the invention: the pressing mechanism comprises a pressing plate, a pressing spring, a pressing rod and a tensioning spring, wherein the top wall of the pressing plate is fixedly provided with a telescopic rod, the other end of the telescopic rod is fixedly arranged on the bottom wall of the top plate, the top plate is fixedly arranged on the bottom wall of the groove, meanwhile, a compression spring is wound outside the telescopic rod, two ends of the compression spring are respectively arranged on the side walls of the pressing plate and the top plate, meanwhile, the top of the pressure plate is provided with a pressure lever, the bottom of the pressure lever is rotatably arranged on the top of the pressure plate through a rotating seat, the top of the pressure lever is rotatably arranged on the top of the sliding seat, wherein the sliding seat is arranged at the bottom of the first sliding rail in a sliding way, the first sliding rail is fixedly arranged on the bottom wall of the top plate, meanwhile, one end, far away from the telescopic rod, of the sliding seat is fixedly provided with a tensioning spring, the other end of the tensioning spring is fixedly arranged on the side wall of the side plate, and the side plate is fixedly arranged on the left side wall and the right side wall of the top plate.

As a further scheme of the invention: one sides of the upper cover plate and the lower cover plate, which are far away from the rotating shaft, are provided with locking mechanisms, each locking mechanism comprises a connecting rod and an inserted rod, the right side end of the upper cover plate is provided with a vertical hole, the connecting rods are arranged in the vertical holes in a sliding way, meanwhile, the top wall of the right side of the lower cover plate is provided with an installation groove which is positioned right below the vertical hole, the size of the mounting groove is the same as that of the connecting rod, and the side wall of the bottom of the connecting rod is provided with a side groove, and the right side wall of the mounting groove is internally provided with a sliding hole, an inserted bar is arranged in the sliding hole in a sliding way, the right end of the inserted bar extends out of the sliding hole, wherein the extension end of the insertion rod is fixedly provided with a pulling plate, one side wall of the pulling plate close to the lower cover plate is provided with two insertion springs, the other end of each insertion spring is fixedly arranged on the side wall of the lower cover plate, and two are inserted tight spring and are set up about the inserted bar symmetry, and fixed mounting has the jack-up spring on the diapire of mounting groove simultaneously.

As a further scheme of the invention: two pairs of limiting grooves are formed in the side wall of the bottom of the vertical hole, a pair of limiting blocks are fixedly mounted on the left side wall and the right side wall of the connecting rod, the limiting blocks are slidably mounted in the limiting grooves, and meanwhile a circular plate is fixedly mounted at the top of the connecting rod.

As a further scheme of the invention: the utility model discloses a horizontal roller, including the faller, the faller is equipped with the horizontal roller, the top of auxiliary tank has seted up welding groove in the lateral wall all around, and the auxiliary tank passes through welding groove welding in the pinhole of faller, and two pairs of rolling grooves have been seted up to the interior symmetry of the left and right sides wall of auxiliary tank simultaneously, and horizontal gyro wheel is installed to the rolling groove internal rotation, and the auxiliary tank passes through horizontal gyro wheel rolling contact in the lateral wall of last through-hole to a pair of bracing piece is installed to the left.

As a further scheme of the invention: the quad slit has been seted up at supplementary roof portion, the inside of quad slit is provided with two pairs of grip blocks, and a pair of spout has been seted up to the left and right sides symmetry of quad slit, the left and right sides slidable mounting of grip block is in the spout, the screw rod is installed to a lateral wall internal rotation that the grip block deviates from each other simultaneously, the screw rod stretches out from the lateral wall of quad slit, carry out horizontal slip along the spout through screw rod control grip block, and fixed mounting has slide rail two in the lateral wall that the grip block is close to each other, slidable mounting has the slider in slide rail two, a pair of grip block is installed to the slider symmetry in keeping away from the lateral wall of grip block, be provided with between two grip blocks and press from both sides the mouth, be used.

As a further scheme of the invention: the blind groove has been seted up to the diapire of bracing piece, and the slidable mounting in blind groove has a slide cartridge, and fixed mounting has down spring on the roof of slide cartridge, and the other end fixed mounting of down spring has the installation piece on the diapire of slide cartridge simultaneously, and the pivot is installed in the inside rotation of installation piece, and both ends fixed mounting has perpendicular gyro wheel about the pivot.

As a further scheme of the invention: and an anti-skid plate is fixedly arranged on the bottom wall of the pressing plate.

As a further scheme of the invention: step grooves are formed in two sides of the top of the upper through hole, a pair of butt straps are symmetrically mounted on two side walls of the left side and the right side of the auxiliary box, the size of the butt straps is the same as that of the step grooves, and the auxiliary box is placed on the top wall of the step grooves through the butt straps.

As a still further scheme of the invention: the method for sewing the zigzag decorative stitch on the thin fabric comprises the following steps:

the method comprises the following steps: firstly, welding an auxiliary box in a needle cylinder of a needle plate through a welding groove, simultaneously extending a needle head between two clamping plates, adjusting a screw rod by an operator, and enabling the clamping plates to be in sliding contact with the side walls of the needle head to complete the installation of the needle head;

step two: clamping the processed fabric between the upper groove and the lower groove, and fixing the upper cover plate and the lower cover plate through a locking mechanism to finish the fixing of the processed fabric;

step three: and fixedly mounting the auxiliary box in the upper through hole through a butt strap, starting a zigzag sewing machine, slightly pushing the template forwards to perform sewing operation of the zigzag line, pulling the pull plate after the sewing is finished, opening the upper cover plate, and taking the processed fabric out of the lower groove.

Compared with the prior art, the invention has the beneficial effects that: the processing template group is provided with an upper cover plate and a lower cover plate, wherein the upper cover plate and the lower cover plate are rotatably arranged together through a rotating shaft, a rectangular lower groove is arranged in the bottom wall of the upper cover plate, the top wall of the lower cover plate is provided with a rectangular upper groove which is buckled together by a lower groove and an upper groove to form a mounting chamber for mounting the fabric, and the bottom walls of the upper groove and the lower groove are fixedly provided with a plurality of pressing mechanisms, in the pressing process, the tension spring forcibly presses the pressing rod, the pressing rod downwards presses the pressing plate, the pressing plate is further pressed by matching with the pressing spring, the pressing plate is fully guaranteed to be pressed on the surface of the fabric, the fabric is effectively prevented from horizontally sliding in the sewing process, a secondary pressing working mode is adopted, when one elastic force fails, the other elastic force continues to compress the pressing plate, the pressing mechanism works more reliably, and the clamping effect of the fabric is better.

Meanwhile, the processing template set is provided with the auxiliary box, two pairs of clamping plates are arranged in the auxiliary box and used for clamping the needle head and supporting the middle part of the needle head, the phenomenon that the needle head is bent in the long-time working process is avoided, the auxiliary box is adopted to carry out sewing operation through the auxiliary needle head, the requirement on the proficiency of operators is greatly reduced, and the production efficiency is greatly improved.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a top view of the upper cover plate of the present invention.

Fig. 3 is a plan view of a needle board of the present invention.

Fig. 4 is an enlarged detail view of the invention at a.

Fig. 5 is an enlarged detail view of the invention at point B.

Fig. 6 is a side view of the auxiliary tank of the present invention.

Fig. 7 is a top view of the auxiliary tank of the present invention.

Fig. 8 is an enlarged detail view at C of the present invention.

Fig. 9 is a schematic view of the internal structure of the support rod of the present invention.

Fig. 10 is a schematic view of the completion of the processing of the fabric of the present invention.

As shown in the figure: 1. an upper cover plate, 2, a lower cover plate, 3, a rotating shaft, 4, an upper groove, 5, a lower groove, 6, a fabric, 7, an upper through hole, 8, a lower through hole, 9, a needle plate, 10, an auxiliary box, 11, an inner groove, 12, a pressure plate, 13, a telescopic rod, 14, a compression spring, 15, a top plate, 16, a compression rod, 17, a sliding seat, 18, a sliding rail I, 19, a rotating seat, 20, a tension spring, 21, a side plate, 22, an anti-skid plate, 23, a vertical hole, 24, a connecting rod, 25, a mounting groove, 26, a side groove, 27, a sliding hole, 28, an insertion rod, 29, a pulling plate, 30, a compression spring, 31, a jacking spring, 32, a limiting groove, 33, a limiting block, 34, a circular plate, 35, a step groove, 36, a welding groove, 37, a butt strap plate, 38, a rolling groove, 39, a horizontal roller, 40, a supporting rod, 41, a vertical roller, a square roller 42, a screw rod, 46. the second sliding rail 47, the sliding block 48, the clamping plate 49, the needle head 50, the anti-collision block 51, the blind groove 52, the sliding barrel 53, the pressing spring 54, the mounting block 55 and the rotating shaft.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "sleeved/connected," "connected," and the like are to be construed broadly, e.g., "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1 to 10, in an embodiment of the present invention, a template set for sewing a zigzag decorative stitch on a thin fabric includes an upper cover plate 1, a lower cover plate 2, a rotating shaft 3, a needle plate 9 and an auxiliary box 10, left side walls of the upper cover plate 1 and the lower cover plate 2 are rotatably mounted together through the rotating shaft 3, the upper cover plate 1 and the lower cover plate 2 can rotate 90 degrees around the rotating shaft 3, so as to fasten the upper cover plate 1 and the lower cover plate 2 together, and the device is more convenient to move, a rectangular lower groove 4 is formed in a bottom wall of the upper cover plate 1, a rectangular upper groove 5 is formed in a top wall of the lower cover plate 1, wherein a size of the upper groove 5 is the same as a size of the lower groove 4, the lower groove 4 and the upper groove 5 are fastened together to form a mounting chamber for mounting a fabric 6, a rectangular upper through hole 7 is formed in the upper cover plate 1, and a rectangular lower through hole 8 is formed in, lower through-hole 8 and last through-hole 7 symmetry set up, wherein go up the supporting auxiliary box 10 that is provided with of through-hole 7, and auxiliary box 10 welds in the needle inslot of faller 9, and the zigzag sewing machine faller of conventional structure is chooseed for use to faller 9 to stretch out from the bottom of faller 9 in the bottom of auxiliary box 10, fix a position faller 9 through auxiliary box 10, slide along last through-hole 7, accomplish the sewing to 6 zigzag lines of surface fabric.

Wherein, a plurality of hold-down mechanisms are fixedly installed on the bottom walls of the upper groove 4 and the lower groove 5, the hold-down mechanisms hold down the fabric 6, the hold-down mechanisms comprise a pressure plate 12, a hold-down spring 14, a pressure rod 16 and a tension spring 20, wherein, an expansion link 13 is fixedly installed on the top wall of the pressure plate 12, the other end of the expansion link 13 is fixedly installed on the bottom wall of the top plate 15, the top plate 15 is fixedly installed on the bottom wall of the groove, the hold-down spring 14 is wound outside the expansion link 13, both ends of the hold-down spring 14 are respectively installed on the side walls of the pressure plate 12 and the top plate 15, the pressure plate 12 is pressed on the surface of the fabric 6 through the hold-down spring 14, and the expansion link 13 protects the hold-down spring 14, so that the hold-down spring 14 can only move vertically, thereby avoiding the horizontal collapse of the, meanwhile, a pressure lever 16 is arranged at the top of the pressure plate 12, the bottom of the pressure lever 16 is rotatably arranged on the top of the pressure plate 12 through a rotating seat 19, the top of the pressure lever 16 is rotatably arranged at the top end of a sliding seat 17, the sliding seat 17 is slidably arranged at the bottom of a sliding rail 18, the sliding rail 18 is fixedly arranged on the bottom wall of the top plate 15, a tension spring 20 is fixedly arranged at one end of the sliding seat 17 away from the telescopic rod 13, the other end of the tension spring 20 is fixedly arranged on the side wall of a side plate 21, the side plate 21 is fixedly arranged on the left side wall and the right side wall of the top plate 15, in the compression process, the tension spring 20 compresses the pressure lever 16 with force, the pressure lever 16 compresses the pressure plate 12 downwards and is matched with the compression spring 14 to further compress, the pressure plate 12 is fully ensured to be compressed on the surface of, when one elastic force fails, the other elastic force continues to press the pressing plate 12, and the pressing mechanism works more reliably.

Wherein, one side of the upper cover plate 1 and one side of the lower cover plate 2 far away from the rotating shaft 3 are provided with a locking mechanism, the locking mechanism comprises a connecting rod 24 and an inserting rod 28, the right side end of the upper cover plate 1 is provided with a vertical hole 23, the connecting rod 24 is slidably mounted in the vertical hole 23, the top wall of the right side of the lower cover plate 2 is provided with a mounting groove 25, the mounting groove 25 is positioned under the vertical hole 23, the size of the mounting groove 25 is the same as that of the connecting rod 24, the side wall of the bottom of the connecting rod 24 is provided with a side groove 26, the right side wall of the mounting groove 25 is provided with a sliding hole 27, the inserting rod 28 is slidably mounted in the sliding hole 27, the right end of the inserting rod 28 extends out from the sliding hole 27, the extending end of the inserting rod 28 is fixedly provided with a pulling plate 29, one side wall of the pulling plate 29 near the lower cover plate 2 is provided, and two insertion springs 30 are symmetrically arranged about the insertion rod 28, when the connecting rod 24 is inserted into the mounting groove 25, the insertion rod 28 is inserted into the side groove 26, the fixed connection between the upper cover plate 1 and the upper cover plate 2 is completed, meanwhile, the bottom wall of the mounting groove 25 is fixedly provided with a jacking spring 31, when the upper cover plate 1 needs to be opened, the insertion rod 28 is pulled out from the side groove 26 through a pulling plate 29, at the moment, the connecting rod 24 is jacked out from the mounting groove 25 under the action of the jacking spring 31, the disassembly between the upper cover plate 1 and the lower cover plate 2 is completed, meanwhile, two pairs of limiting grooves 32 are arranged in the bottom side wall of the vertical hole 23, a pair of limiting blocks 33 are fixedly arranged on the left side wall and the right side wall of the connecting rod 24, the limiting blocks 33 are slidably arranged in the limiting grooves 32, meanwhile, the limiting grooves 32 limit the rotation of the connecting rod 24, and also install the connecting rod 24 in, connecting rod 24 drops from upper cover plate 1, and the top fixed mounting of connecting rod 24 has the plectane 34 simultaneously, has made things convenient for operating personnel to the pressing of connecting rod 24.

Wherein, the side wall around the top of the auxiliary box 10 is provided with a welding groove 36, the auxiliary box 10 is welded in the needle hole of the needle plate 9 through the welding groove 36, meanwhile, two pairs of rolling grooves 38 are symmetrically arranged in the left side wall and the right side wall of the auxiliary box 10, horizontal rollers 39 are rotatably arranged in the rolling grooves 38, the auxiliary box 10 is in rolling contact with the side wall of the upper through hole 7 through the horizontal rollers 39, so that the auxiliary box 10 can move more conveniently, the friction force between the auxiliary box 10 and the upper through hole 7 is reduced, a pair of support rods 40 are symmetrically arranged at the bottom of the left side wall and the right side wall of the auxiliary box 10, the bottom of the support rods 40 is connected with vertical rollers 41, in the working engineering, the vertical rollers 41 are in rolling contact with the top wall of the fabric 6, the auxiliary box 10 can move conveniently at the top of the fabric 6, meanwhile, the two sides of the top of the upper through, the size of the butt strap 37 is the same as that of the step groove 35, the auxiliary box 10 is placed on the top wall of the step groove 35 through the butt strap 37, the auxiliary box 10 is supported through the step groove 35, the auxiliary box 10 is prevented from being driven to press the fabric 6 in the needle head working process, and the smoothness of the fabric 6 is guaranteed.

Wherein, the top of the auxiliary box 10 is provided with a square hole 43, two pairs of clamping plates 44 are arranged inside the square hole 43, the left side and the right side of the square hole 43 are symmetrically provided with a pair of sliding grooves 45, the left side and the right side of each clamping plate 44 are slidably mounted in the sliding grooves 45, meanwhile, a side wall of each clamping plate 44, which is far away from each other, is rotatably provided with a screw rod 42, the screw rods 42 extend out of the side wall of the square hole 43, the clamping plates 44 are controlled by the screw rods 42 to horizontally slide along the sliding grooves 45, a sliding rail second 46 is fixedly mounted in the side wall of each clamping plate 44, the sliding rail second 46 is slidably mounted with a sliding block 47, a pair of clamping plates 48 is symmetrically mounted in the side wall of each sliding block 47, a clamping opening is arranged between the two clamping plates 48 and used for clamping the needle 49 to support the middle part of the, meanwhile, the anti-collision plate 50 is fixedly mounted on the top wall of the clamping plate 48, the clamping plate 48 is protected through the anti-collision plate 50, and the situation that the clamping plate 48 is damaged due to collision caused by misoperation of an operator is avoided.

The bottom wall of the support rod 40 is provided with a blind groove 51, the sliding sleeve 51 is slidably mounted on the blind groove 52, a down-pressing spring 53 is fixedly mounted on the top wall of the sliding sleeve 52, the other end of the down-pressing spring 53 is fixedly mounted on the top wall of the blind groove 51, a mounting block 54 is fixedly mounted on the bottom wall of the sliding sleeve 52, a rotating shaft 55 is rotatably mounted inside the mounting block 54, and vertical rollers 41 are fixedly mounted at the left end and the right end of the rotating shaft 55, wherein the elasticity of the down-pressing spring 53 is low, and the down-pressing spring 53 is used for pressing the vertical rollers 41 onto the top wall of the fabric 6, so that the auxiliary box 10 is suitable for the fabrics 6 with different thicknesses.

Preferably, the bottom wall of the pressing plate 12 is fixedly provided with the anti-slip plate 22, the friction force between the pressing plate 12 and the fabric 6 is increased through the anti-slip plate 22, and the pressing effect is better.

Referring to FIG. 10, a method for sewing a zigzag decorative stitch on a thin fabric according to the above preferred embodiment of the present invention is shown as follows:

the method comprises the following steps: firstly, the auxiliary box 10 is welded in a needle cylinder of the needle plate 9 through the welding groove 36, meanwhile, a needle head 49 extends between two clamping plates 48, an operator adjusts the screw rod 42, and the clamping plates 48 are in sliding contact with the side wall of the needle head 49, so that the installation of the needle head 49 is completed;

step two: clamping a processed fabric 6 between the upper groove 4 and the lower groove 5, and fixing the upper cover plate 1 and the lower cover plate 2 through a locking mechanism to finish the fixing of the processed fabric;

step three: the auxiliary box 10 is fixedly installed in the upper through hole 7 through the attachment strap 37, the zigzag sewing machine is started, the template is pushed forward to carry out sewing operation of zigzag lines (at the moment, the needle head 49 slides left and right in the auxiliary box 10, and sewing operation is carried out repeatedly by a left needle and a right needle), after sewing is finished, the pull plate 29 is pulled, the upper cover plate 1 can be opened, and then the processed fabric 6 is taken out from the lower groove 5.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or modifications of the invention can be made, and equivalents and modifications of some features of the invention without departing from the spirit and scope of the invention.