TWM644522U - Stretch sewing machine - Google Patents

Abstract

This creative interlock sewing machine includes: a sewing body, multiple machine needles, loopers, fixed cutters and movable cutters. The sewing body has a needle plate with multiple pinholes and a lower shaft that can rotate. It can drive multiple needle threads into one of the needle holes one by one. In addition, the looper can swing through the lower shaft, so that the looper cooperates with multiple machine needles to produce thread hooking movement, so that the bottom thread can interweave multiple needle threads, and The movable cutter is provided with a lower thread cutting edge and a plurality of needle thread cutting edges, and can move back and forth between the thread hooking position and the cutting position relative to the fixed cutter. Hook the bobbin thread at the opening and let each needle thread edge hook a needle thread individually, so that when the movable cutter moves to the cutting position, the bobbin thread edge can cut off the bobbin thread and let each needle thread edge cut off a needle thread individually, thereby It can reduce the load on the movable cutter to cut the needle thread.

Description

interlock sewing machine

This creation concerns an interlock sewing machine that produces chain stitches, and in particular an interlock sewing machine that ensures that all needle and bobbin threads are cut off after the sewing operation has been completed.

The sewing machine is mainly to combine several layers of sewing materials with each other through sewing, and, with the continuous evolution of technology, there are many styles of sewing machines on the market, and different styles of sewing machines can be used for different sewing Among them, there are currently existing seam machines on the market that can selectively carry out sewing methods such as rolling collar, piping, hemming, seam seaming, splicing seam or trimming to clothing.

Please refer to Fig. 1 and Fig. 2, which is a conventional column type interlock sewing machine 1 for sewing garments or shoe uppers. The conventional column type interlock sewing machine 1 has a sewing body 10, a needle bar mechanism 11, and a looper Mechanism 12 and thread cutting mechanism 13, as shown in the figure, sewing body 10 has three parts of a headstock 101, a pillar 102 and a base 103, the inside of the headstock 101 has a rotatable upper shaft 104, and the inside of the base 103 There is a lower shaft 105 parallel to the upper shaft 104, and the lower shaft 105 can be rotated by being driven by the upper shaft 104, wherein, the base 103 faces the headstock 101 to form a columnar seat 106 arranged at intervals on the pillar 102, and the columnar A needle plate 107 below the needle bar mechanism 11 is mounted on the top of the seat 106, and the needle plate 107 is formed with a plurality of needle holes 107a.

The needle bar mechanism 11 has a plurality of machine needles 111, and each machine needle 111 is located in one of the needle holes 107a of the needle plate 107 in pairs, and the needle bar mechanism 11 is connected to the upper shaft 104 of the sewing body 10, so that the upper shaft 104 When rotating, the machine needle 111 can be driven to pass through the needle hole 107a. The looper mechanism 12 is located inside the cylindrical seat 106 of the sewing body 10, and the looper mechanism 12 has a looper 121, wherein the looper mechanism 12 is connected Connected to the lower shaft 105 of the sewing body 10, so that when the lower shaft 105 rotates through the upper shaft 104, the lower shaft 105 can drive the looper 121 to swing, and then the looper 121 can cooperate with a plurality of machine needles 111 to generate thread hooking motion , so that a bobbin thread 14 (as shown in FIG. 3A ) passed through the looper 121 can be interwoven with a plurality of needle threads 15 passed through the machine needle 111 (as shown in FIG. 3A ).

The thread cutting mechanism 13 has a fixed cutter 131, a movable cutter 132 and a clamping spring 133. The fixed cutter 131 is connected to the needle plate 107 of the cylindrical seat 106, and the movable cutter 132 has a bottom thread cutting edge 132a and a The needle thread edge 132b is arranged on one side of the bottom thread edge 132a, and the movable cutter 132 can swing back and forth relative to the fixed cutter 131, wherein the thread clamp elastic piece 133 is used to allow the bottom thread edge 132a or the needle thread edge 132b to Contact with the fixed cutter 131.

Please refer to FIG. 3A and FIG. 3B , after the conventional column type interlock sewing machine 1 completes the sewing operation for garments or shoe uppers, the movable cutter 132 of the thread trimming mechanism 13 moves to a thread hooking position A1, so that the movable cutter 132 The lower thread cutting edge 132a is ready to hook the lower thread 14, and the needle thread cutting edge 132b of the movable cutter 132 is ready to catch a plurality of needle threads 15. Next, the movable cutter 132 swings from the thread hooking position A1 to a cutting position A2, so that the needle thread The cutting edge 132b cooperates with the fixed cutter 131 to cut off a plurality of needle threads 15 first, and then the lower thread cutting edge 132a cooperates with the fixed cutter 131 to cut off the lower thread 14. After the lower thread 14 is cut off by the lower thread cutting edge 132a and the fixed cutter 131, The thread end of the needle thread 15 is in an unclamped state, while the thread end of the bottom thread 14 is clamped jointly by the movable cutter 132 and the thread clamping elastic piece 133 .

However, when the conventional column-type interlock sewing machine 1 sews clothing or thin materials, it will use a thinner bottom thread 14 and a thinner needle thread 15, so that the single needle thread edge 132b of the movable cutter 132 can cooperate with the fixed cutter 131. Cut off all the thinner needle threads 15 at one time, but, when the conventional column type interlock sewing machine 1 is used for sewing uppers or thick materials, the conventional column type interlock sewing machine 1 can use the thicker bottom line 14 and the thicker needle thread 15, when the single needle thread cutting edge 132b of the movable cutter 132 cooperates with the fixed cutter 131 to cut off the thicker needle thread 15 There will be greater resistance, and then the needle thread cutting edge 132b and the fixed cutter 131 are difficult to cut off all the thicker needle threads 15 together at one time, causing the bottom thread 14 and the needle thread 15 used in the conventional column type interlock sewing machine 1 to be two The thickness is often limited, or the conventional column type interlock sewing machine 1 cannot be equipped with the automatic thread trimming function.

The main purpose of this creation is the structure of the thread trimming mechanism of the interlock sewing machine, so that whether the interlock sewing machine uses thinner bottom thread and needle thread to sew clothing or thin materials, or uses thicker bottom thread and needle thread to sew For sewing on shoe uppers or thick materials, the thread cutting mechanism of the interlock sewing machine can cut multiple needle threads at one time, thereby improving the practicability of the interlock sewing machine.

To achieve the aforementioned purpose, the present invention provides an interlock sewing machine, which includes: a sewing body, a plurality of machine needles, a looper and a thread cutting mechanism.

The above-mentioned sewing body has a rotatable lower shaft and a needle plate on one side of the above-mentioned lower shaft. One pair is located in one of the needle holes, and the above-mentioned plurality of machine needles can be close to or away from the above-mentioned needle plate, so that the above-mentioned machine needles can drive the above-mentioned needle thread to pass through the above-mentioned needle hole.

Driven by the above-mentioned lower shaft, the above-mentioned can swing, so that the above-mentioned looper cooperates with the above-mentioned plurality of machine needles to generate thread hooking movement, so that a bobbin thread passing through the above-mentioned looper can be interwoven with the above-mentioned plurality of needle threads, and the above-mentioned thread cutting mechanism has a A fixed cutter fixed to the above-mentioned sewing body, a movable cutter that can move relative to the above-mentioned fixed cutter, and a thread cutting drive assembly connected to the above-mentioned movable cutter, the above-mentioned thread-cutting drive assembly can drive the above-mentioned movable cutter from a hook The hooking position of the above-mentioned needle thread and the bottom thread is moved to a cutting position close to the above-mentioned fixed cutter, so that the above-mentioned movable cutter cooperates with the above-mentioned fixed cutter to cut off the above-mentioned needle thread and the bottom thread.

Wherein, the above-mentioned movable cutting tool has a bottom thread cutting edge and a plurality of needle thread cutting edges, and the above-mentioned bottom thread cutting edge can be hooked on the above-mentioned bottom thread, and each of the above-mentioned needle thread cutting edges can be hooked on one of the above-mentioned needle threads.

In this embodiment, when the movable cutter is located at the thread hooking position, all the needle thread cutting edges are located on one side of the needle hole, while the fixed cutter is located on the other side of the needle hole.

The above-mentioned thread trimming mechanism further has a thread clamping elastic piece, and the above-mentioned thread clamping elastic piece is provided with a connection part connected to the above-mentioned needle plate and a thread clamping part close to the above-mentioned fixed cutter, and a guide is provided between the above-mentioned connection part and the thread clamping part. part, and the above-mentioned guide part is used to allow the above-mentioned movable cutter to penetrate between the above-mentioned clamping part and the fixed cutter during the process of moving to the above-mentioned hooking position, so that the above-mentioned clamping part can contact the above-mentioned movable cutter To produce a clamping force acting on the above-mentioned movable cutter.

Wherein, the above-mentioned clamp elastic piece further has an extension part arranged at intervals on the above-mentioned connection part, one end of the above-mentioned extension part is extended to form a deformable deformation part to connect to the above-mentioned connection part, and the other end forms an extension part arranged at intervals on the above-mentioned clip. The abutting part of the wire part, and the above-mentioned thread cutting mechanism further has an adjustment part, and the above-mentioned adjustment part is locked to the above-mentioned connection part from the above-mentioned extension part to change the distance between the above-mentioned connection part and the extension part, so that the above-mentioned deformation part can Different degrees of deformation are generated, and the abutting portion can contact the thread clamping portion through the deformed portion in different deformation states to adjust the magnitude of the thread clamping force F.

The feature of this creation is that the movable cutter of the thread trimming mechanism is not only equipped with a bottom thread cutting edge, but also has a plurality of needle thread cutting edges, so that when the movable cutter moves to the thread hooking position, the bottom thread cutting edge can catch the thread. on the bottom thread, and each needle thread edge can be hooked on one of the needle threads one by one, and then when the movable cutter moves from the thread hooking position to the cutting position, the bottom thread edge cooperates with the fixed cutter to cut off the bottom thread, and Each needle thread edge cooperates with the fixed cutter to cut off a needle thread individually, so that the interlock sewing machine no matter Whether to use a thinner bottom thread and needle thread to sew on clothing, or use a thicker bottom thread and needle thread to sew on the shoe upper, the movable cutter of the thread cutting mechanism can cut off multiple needle threads at one time, thereby improving the interlock seam. machine usability.

1: Known column type interlock sewing machine

10: Sewing body

101: front

102: Pillar

103: base

104: upper shaft

105: lower shaft

106: Cylindrical seat

107: Needle plate

107a: pinhole

11: Needle bar mechanism

111: machine needle

12: Looper mechanism

121: Looper

13: Tangent mechanism

131: fixed cutter

132: Movable cutter

132a: Bottom line cutting edge

132b: sewing edge

133:Clamp shrapnel

14: Bottom line

15: Needlework

A1: Hook position

A2: cut off position

2: interlock sewing machine

20: Sewing body

21: front

22: pillar

23: base

231: Countertop

24: upper shaft

25: lower shaft

26: Cylindrical seat

261: Looper shaft support

262:needle plate

262a: pinhole

262b: Feeding through hole

30: needle bar mechanism

31: Needle bar

32: Needle

40: Feeding mechanism

41: Feed tooth

42: Feeding linkage rod

421: long and narrow hole

43: Feeding drive assembly

44: Latch

45: Slider

50: Looper Mechanism

51: Looper drive assembly

511: Eccentric wheel

512: Bearing

52: Looper connecting rod

53: Looper seat

531: Looper

60: Tangent mechanism

61: fixed cutter

611: fixed blade

62: Movable cutter

621: Bottom line cutting edge

622: Needlework edge

63:Tangent drive assembly

631: Tangent turning lever

632: Tangent driving source

64:Clamp shrapnel

641: connection part

642: Extension

643: Guidance department

644: clamping part

645: Department of deformation

646: abutting part

65: Adjustment parts

651: head

652: thread fitting part

70: Needlework

80: bottom line

B1: hook line position

B2: cut off position

F: clamping force

Fig. 1 is a side view of a conventional column-type interlock sewing machine; Fig. 2 is an exploded view of the needle, needle plate and looper; Fig. 3A is a schematic diagram of a conventional column-type interlock sewing machine where the movable cutter is at the hooking position ; Fig. 3B is a schematic diagram of the movable cutter in the cutting position of a conventional column type interlock sewing machine; Fig. 4 is a perspective view of the creative interlock sewing machine; Schematic diagram; Figure 6 is an exploded view of the feeding mechanism, the looper mechanism and the thread cutting mechanism; Figure 7 is an exploded view of the feeding mechanism; Figure 8 is an exploded view of the looper mechanism; Figure 9A is a perspective view of the thread cutting mechanism; 9B is an exploded view of the thread trimming mechanism relative to the needle plate; Fig. 10A and Fig. 10B are schematic diagrams of the abutting part in contact with the clamping part; Fig. 11A is a schematic diagram of the seaming operation of the creative interlock sewing machine; Fig. 11B is a movable cutter A schematic diagram of moving to the hooking position; and FIG. 11C is a schematic diagram of moving the movable cutter to the cutting position.

In order to further have a clearer and more detailed understanding of the structure, use and characteristics of this creation, a preferred embodiment is proposed, and the detailed description is as follows with the drawings: In this drawing, the two sides of the X-axis refer to the left and right sides of the interlock sewing machine facing the operator, and the two sides of the Y-axis refer to the front and rear sides of the operator facing the interlock sewing machine. As for the two sides of the Z-axis Side refers to the upper and lower sides of the interlock sewing machine that the operator faces, and in this case manual, directional words such as "front", "back", "left", "right", "upper" and "lower" are Refers to the direction presented by the sewing machine operator facing the interlock sewing machine.

Please refer to Fig. 4, Fig. 5 and Fig. 6, the creative interlock sewing machine 2 is mainly composed of a sewing body 20, a needle bar mechanism 30, a feeding mechanism 40, a looper mechanism 50 and a thread cutting mechanism 60, The sewing body 20 mainly has three parts: a headstock 21, a pillar 22 and a base 23. The headstock 21 has an upper shaft 24 that can rotate around the X axis, and the inside of the base 23 has a shaft parallel to the X axis. The lower shaft 25, the lower shaft 25 can rotate synchronously through the rotating upper shaft 24, wherein the base 23 has a work table 231 facing the headstock 21, and the base 23 forms a position along the Z axis from the work table 231 The cylindrical seat 26 below the headstock 21, as shown in the figure, the cylindrical seat 26 has a looper shaft support 261 which is hollow inside and a needle plate 262 assembled on the top of the looper shaft support 261, and the needle plate 262 is provided with a plurality of pinholes 262a (as shown in FIG. 9B ) and a feeding through hole 262b (as shown in FIG. 9B ).

The needle bar mechanism 30 has a needle bar 31 substantially parallel to the Z axis, the needle bar 31 is assembled on the upper shaft 24 of the sewing body 20, and the lowest part of the needle bar 31 is provided with a number of machine needles 32 corresponding to the needle holes 262a, wherein , the upper shaft 24 rotates to drive the needle bar 31 to reciprocate longitudinally along the Z axis, so that each machine needle 32 can pass through one of the needle holes 262a one-to-one through the above-mentioned needle bar 31 moving along the Z axis, Thereby, a plurality of machine needles 32 can be close to or away from the cylindrical seat 26 of the sewing body 20 through the rotation of the upper shaft 24, and each machine needle 32 is individually threaded with a needle thread 70 (as shown in Figure 11A), so that the machine When the needle 32 moves downward and passes through the needle hole 262a, the needle thread 70 will be brought into the needle hole 262a by the moving machine needle 32, and then a part of the needle thread 70 will be located inside the looper shaft support 261 of the column base 26.

6 and 7, the feeding mechanism 40 is mainly located in the cylindrical seat 26 of the sewing body 20, and the feeding mechanism 40 has a feeding tooth 41, a feeding linkage rod 42 and a feeding drive assembly 43, feeding The tooth 41 is opposite to the feeding through hole 262b located in the needle plate 262, and the feeding tooth 41 is movably connected to the feeding linkage rod 42. In this embodiment, the feeding tooth 41 and the feeding linkage rod 42 are formed by a chute and The assembly method of the slide rails is connected to each other, so that the feed tooth 41 can selectively adjust the height difference relative to the feed linkage rod 42, and then the relative position between the feed teeth 41 and the needle plate 262 can be changed. In addition, the feed linkage rod 42 It is located between the feeding tooth 41 and the feeding drive assembly 43, and a partial area of the feeding linkage rod 42 penetrates to form a long and narrow hole 421, and the feeding linkage rod 42 passes through a pin 44 and a slider 45 at the position of the long and narrow hole 421. The slit hole 421 is pivotally connected to the looper shaft support 261 of the cylindrical seat 26. In addition, the feeding drive assembly 43 is connected between the lower shaft 25 of the sewing body and the feeding linkage rod 42, and the feeding drive assembly 43 can The rotary motion of the lower shaft 25 is changed to allow the feed tooth 41 to move back and forth and up and down at the same time, so that the feed tooth 41 can simultaneously move back and forth and up and down in the feed through hole 262b of the needle plate 262, so that the feed tooth 41 Can produce approximately elliptical motion trajectory.

6 and 8, the looper mechanism 50 is mainly composed of a looper driving assembly 51, a looper linkage rod 52 and a looper seat 53. The looper driving assembly 51 has an eccentric wheel 511 and a Two parts of the bearing 512, the eccentric wheel 511 is connected to the lower shaft 25 of the sewing body 20, and the bearing 512 is sleeved on the periphery of the eccentric wheel 511, in addition, one end of the looper linkage rod 52 is sleeved on the periphery of the bearing 512, and the looper The other end of the linkage rod 52 is pivotally connected to the looper seat 53, wherein the looper seat 53 is equipped with a looper 531 close to the needle plate 262, whereby when the lower shaft 25 of the sewing body 20 rotates, the bearing 512 The shaft center will rotate around the lower shaft 25 through the eccentric wheel 511, so that the looper connecting rod 52 can swing back and forth through the bearing 512, and then the looper connecting rod 52 that swings back and forth can drive the looper seat 53 to swing, so that Looper 531 can be to needle bar mechanism 30 A plurality of machine needles 32 of a plurality of machine needles 32 are used to generate thread hooking motion, so that a bobbin thread 80 (as shown in FIG. 11B ) installed on a looper 531 can be interwoven with a plurality of needle threads 70 .

9A and 9B, the thread cutting mechanism 60 is installed on the cylindrical seat 26 of the sewing body 20, and the thread cutting mechanism 60 has a fixed cutter 61, a movable cutter 62, a thread cutting drive assembly 63, a clip The thread elastic piece 64 and an adjustment piece 65, wherein the fixed cutter 61 is connected to the needle plate 262 of the cylindrical seat 26, and one side of the fixed cutter 61 is provided with a fixed blade 611 to be close to the needle hole 262a of the needle plate 262 The movable cutter 62 is located inside the looper shaft support 261 of the cylindrical seat 26, and the movable cutter 62 is provided with a bottom thread cutting edge 621 and a plurality of needle thread cutting edges 622 arranged at intervals at different positions, wherein the movable cutting knife The knife 62 is positioned on the lower side of the fixed blade 611, so that the height of the movable cutter 62 is lower than the fixed cutter 61. The thread cutting drive assembly 63 has a thread tangent rotating rod 631 inside the cylindrical seat 26 and a thread cutting rod 631 on the base 23. The internal thread cutting driving source 632, one end of the thread cutting rotating rod 631 is connected to the movable cutter 62, and the other end of the thread cutting rotating rod 631 is connected to the cutting thread driving source 632, and the thread cutting driving source 632 can drive the thread cutting rotating rod 631 to swing, so that The swinging tangent rotating rod 631 can drive the movable cutter 62 to selectively approach or move away from the fixed cutter 61 .

The thread clamp elastic piece 64 of the thread cutting mechanism 60 has a connecting portion 641 and an extending portion 642 arranged at intervals on the connecting portion 641. The connecting portion 641 is connected to the needle plate 262 of the cylindrical seat 26, wherein one end of the connecting portion 641 is sequentially formed A guide portion 643 that presents an inclined pattern and a thread clamping portion 644 extending from the guide portion 643. The thread clamping portion 644 is close to the fixed cutter 61 of the thread cutting mechanism 60. In this embodiment, because the guide portion 643 is inclined, so that the guide part 643 can generate a height difference between the connecting part 641 and the clamping part 644, and the guide part 643 is used to allow the moving movable cutter 62 to penetrate into the clamping part 644 Between the fixed cutter 61, the clamping portion 644 can be in contact with the movable cutter 62 to generate a clamping force F acting on the movable cutter 62 (as shown in FIG. 10A ), so that the bottom thread of the movable cutter 62 Edge 621 or one of the sewing edges 622 can be in contact with the fixed blade 611 of the fixed cutter 61. As shown in the figure, the connecting portion 641 extends from the end away from the guiding portion 643 to form a deformable deformable portion 645 to connect to the extending portion 642, and the extending portion 642 is connected to the extending portion 642. An end away from the deforming portion 645 extends to form abutting portions 646 spaced apart from the clamping portion 644 .

The adjusting part 65 of the thread cutting mechanism 60 has a head 651 and a thread fitting part 652 extending from the head 651. The thread fitting part 652 passes through the connection between the extension part 642 of the thread clamping elastic piece 64 and the thread clamping elastic piece 64 in sequence. Part 641 is threadedly fitted to the needle plate 262 of the cylindrical seat 26. In this embodiment, since the threaded fitting portion 652 is threadedly fitted to the needle plate 262, when the threaded fitting portion 652 is rotated relative to the needle plate 262 , the head 651 can move linearly to get close to the extension 642, and then the head 651 can be pressed against the extension 642, so that the extension 642 can be displaced relative to the connecting portion 641 of the clamp elastic piece 64, so that the clamp The deformable part 645 of the elastic piece 64 can be deformed through the extended part 642 which is displaced. As shown in FIG. Move to push the extension part 642, make the extension part 642 close to the connection part 641 to reduce the distance between the connection part 641 and the extension part 642, let the deformation part 645 deform to present a first deformation state, and at the same time, clamp the wire The abutment portion 646 of the elastic piece 64 can contact the thread clamping portion 644 through the deformable portion 645 presenting the first deformation state, thereby greatly increasing the magnitude of the thread clamping force F, as shown in FIG. The plate 262 rotates counterclockwise, so that the head 651 moves away from the extension portion 642 to increase the distance between the connecting portion 641 and the extension portion 642, so that the deformation portion 645 changes from the first deformation state to a different shape. In the second deformation state of the first deformation state, at the same time, the abutment portion 646 of the thread clamping elastic piece 64 can still contact the thread clamping portion 644 through the deformation portion 645 presenting the second deformation state, and can slightly reduce the thread clamping effect The size of the force F, thereby, the adjustment member 65 rotates relative to the needle plate 262 to change the distance between the connecting part 641 and the extension part 642, so that the deformation part 645 can produce different degrees of deformation and can also adjust the clamping effect The magnitude of the force F.

Please refer to Fig. 11A to Fig. 11C, the movable cutter 62 of the thread trimming mechanism 60 needs to cut off the bottom thread 80 and the specific application of a plurality of needle threads 70. First, as shown in Fig. During the sewing operation of the shoe upper, the plurality of machine needles 32 of the needle bar mechanism 30 stay above the needle plate 262 of the sewing body 20, and at the same time, the looper 531 of the looper mechanism 50 stays below the needle plate 262, so that the curved The needle 531 is close to the needle hole 262 a of the needle plate 262 .

Please refer to FIG. 11B , next, the thread cutting drive source 632 of the thread cutting drive assembly 63 drives the thread cutting rotating lever 631 of the thread cutting drive assembly 63 to rotate counterclockwise, so that the movable cutter 62 of the thread cutting mechanism 60 can move to contact the thread clamping shrapnel 64 of the guide part 643, and then the movable cutter 62 can pass through the guide part 643 to penetrate between the fixed cutter 61 of the thread cutting mechanism 60 and the clamping part 644 of the clamping spring 64, so that the movable cutter 62 Each needle thread edge 622 of the bottom thread edge 621 and the movable cutter 62 can pass through all the needle holes 262a of the needle plate 262, so that each needle thread edge 622 can be prepared to hook a needle thread 70 individually, and at the same time, the movable The bottom thread edge 621 of the cutter 62 can prepare to hook the bottom thread 80, and when the thread cutting drive source 632 reaches the limit position, the movable cutter 62 stays at a hook thread position B1, and each needle thread edge 622 of the movable cutter 62 As shown in the figure, it can be located on the left side of each corresponding pinhole 262a, while the fixed cutter 61 is located on the right side of all the pinholes 262a as shown in the figure, and then as shown in Figure 11C, the thread cutting driving source 632 drives the thread cutting rotating rod 631 Rotate clockwise to move the movable cutter 62 from the hooking position B1 to a cutting position B2, and then the plurality of needle thread cutting edges 622 and the bottom thread cutting edges 621 can pass through the fixed cutting knife 61 in sequence, so that the plurality of needle thread cutting edges 622 Cooperate with the fixed blade 611 of the fixed cutter 61 to cut off the plurality of needle threads 70 first, and then cut the bottom thread 80 with the fixed blade 611. When the fixed cutter 61 cooperates with the movable cutter 62, the plurality of needle threads 70 and After the bottom thread 80 is cut off, the thread end of the needle thread 70 is in an unclamped state, and the thread end of the bottom thread 80 will be located between the movable cutter 132 and the thread clamping part 644 of the thread clamping spring 64 to be clamped by the movable cutter. 132 and the clamping portion 644 are clamped together.

The above-mentioned embodiments are only used for convenience to illustrate this creation and do not limit it. Without departing from the scope of this creation, various simple deformations and modifications made by skilled persons familiar with this industry according to the patent scope and new description of this creation should still be included. Included in the scope of the following patent applications.

262:needle plate

262a: pinhole

262b: Feeding through hole

61: fixed cutter

611: fixed blade

62: Movable cutter

621: Bottom line cutting edge

622: Needlework edge

631: Tangent turning lever

64:Clamp shrapnel

641: connection part

642: Extension

643: Guidance department

644: clamping part

645: Department of deformation

646: abutting part

65: Adjustment parts

651: head

652: thread fitting part

Claims (4)

An interlock sewing machine, comprising: a sewing body with a rotatable lower shaft and a needle plate on one side of the lower shaft, the needle plate is formed with a plurality of pinholes; a plurality of machine needles, each of the above-mentioned The machine needles can be threaded with a needle thread, and are located in one of the needle holes in pairs, and the above-mentioned plurality of machine needles can be close to or far away from the above-mentioned needle plate, so that the above-mentioned machine needles can drive the above-mentioned needle thread to pass through the above-mentioned needle holes; The needle can be driven by the lower shaft to swing, so that the above-mentioned looper cooperates with the above-mentioned plurality of machine needles to generate thread hooking movement, so that a bottom thread passing through the above-mentioned looper can be interwoven with the above-mentioned plurality of needle threads; and the thread cutting mechanism, It has a fixed cutter fixed to the sewing body, a movable cutter that can move relative to the fixed cutter, and a thread cutting drive assembly connected to the movable cutter. The thread cutting drive assembly can drive the movable cutter from A thread hooking position for hooking the above-mentioned needle thread and bottom thread is moved to a cutting position close to the above-mentioned fixed cutter, so that the above-mentioned movable cutter cooperates with the above-mentioned fixed cutter to cut off the above-mentioned needle thread and bottom thread; it is characterized in that: the above-mentioned movable cutter The tool has a bottom thread cutting edge and a plurality of needle thread cutting edges, the bottom thread cutting edge can be hooked on the bottom thread, and each of the needle thread cutting edges can be hooked on one of the needle threads one by one. The interlock sewing machine according to claim 1, wherein, when the movable cutter is located at the above-mentioned hooking position, all of the above-mentioned needle thread cutting edges are located on one side of the above-mentioned needle hole, and the above-mentioned fixed cutter is located on the side of the above-mentioned needle hole. The other side. The interlock sewing machine as described in claim 1, wherein the above-mentioned thread cutting mechanism further has a thread clamping elastic piece, and the above-mentioned thread clamping elastic piece is provided with a connection part connected to the needle plate and a thread clamping part close to the above-mentioned fixed cutter, the above-mentioned A guide part is provided between the connection part and the clamping part, and the above-mentioned guide part is used to allow the movable cutter to penetrate between the above-mentioned clamping part and the fixed cutter during the process of moving to the above-mentioned hooking position, The above-mentioned thread clamping portion can be in contact with the above-mentioned movable cutter to generate a thread-clamping force acting on the above-mentioned movable cutter. The interlock sewing machine according to claim 3, wherein the above-mentioned thread clamping elastic piece further has an extension part arranged at intervals on the above-mentioned connection part, and one end of the above-mentioned extension part is extended to form a deformable deformation part to be connected to the above-mentioned connection part, and The other end is formed with an abutting portion arranged at intervals on the above-mentioned clamping portion, and the above-mentioned thread cutting mechanism further has an adjustment piece, and the above-mentioned adjustment piece is locked to the above-mentioned connection portion from the above-mentioned extension portion to change the distance between the above-mentioned connection portion and the extension portion. The size of the spacing distance enables the deformation parts to produce different degrees of deformation, and then the abutting part can contact the wire clamping part through the deformation parts of different deformation states to adjust the magnitude of the wire clamping force.

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