Sewing machine and decorative stitch

Abstract

The present application relates to a sewing machine and a decorative stitch. The sewing machine comprises a main shaft for driving a needle assembly to feed, and a feed module for driving a decorative thread to form a decorative stitch with a sewing thread on the needle assembly. The feed module comprises a driving member, which is in cooperative driving relationship with the main shaft; a transmission assembly, one end of which is connected to an output shaft of the driving member; and a feed assembly, which is connected to the other end of the transmission assembly. The driving member drives the feed assembly to operate through the transmission assembly, and the swing frequency and / or swing amplitude of the feed assembly can be adjusted. The feed assembly in the feed module of the sewing machine can be driven by the driving member independently, so that the swing frequency and / or swing amplitude of the feed assembly can be adjusted independently, which is beneficial to change the corresponding movement track of the decorative thread, and thus various changes of the decorative stitch can be realized.

Description

Technical Field

[0001] This invention relates to the field of sewing equipment technology, and in particular to a sewing machine and fancy stitches. Background Technology

[0002] Currently, sewing machines used for creating fancy stitches primarily use a spindle-driven needle feed assembly. However, existing solutions suffer from complex transmission structures between the spindle and the needle feed assembly, requiring high precision in the transmission components and involving complex assembly processes.

[0003] In addition, the thread on the needle feed assembly is usually called decorative thread, which mainly serves a decorative purpose and plays a very important role in some garment processes. However, based on the current structure, the decorative thread on the needle feed assembly forms a single style of fancy stitches, which cannot meet the increasingly personalized needs of the market. Summary of the Invention

[0004] Therefore, it is necessary to provide an improved sewing machine and fancy stitch to address the above problems.

[0005] A sewing machine includes a main shaft and a needle assembly. The main shaft drives the needle assembly to feed the needle. The sewing machine also includes a needle feeding module, which drives decorative thread to form fancy stitches with the sewing thread on the needle assembly. The needle feeding module includes:

[0006] The drive unit works in coordination with the spindle for driving;

[0007] A transmission assembly, one end of which is connected to the output shaft of the drive component;

[0008] The needle feeding assembly is connected to the other end of the transmission assembly;

[0009] The drive unit drives the needle feeding assembly through the transmission component and can adjust the oscillation frequency and / or oscillation amplitude of the needle feeding assembly.

[0010] Furthermore, the ratio of the spindle's movement frequency to the drive component's movement frequency is a multiple, and the drive component's movement frequency is the same as the oscillation frequency of the needle feeding assembly.

[0011] Furthermore, the transmission assembly includes:

[0012] The first rocker arm is connected to the output shaft of the drive component;

[0013] The second swing arm assembly is connected to the needle feeding assembly;

[0014] A swing link is connected at both ends to the first swing arm and the second swing arm assembly, respectively. The swing link drives the second swing arm assembly to swing under the drive of the first swing arm, thereby driving the needle feeding assembly to operate.

[0015] Furthermore, the second swing arm assembly includes a second swing arm and a swing shaft, with both ends of the second swing arm connected to the swing connecting rod and the swing shaft respectively, and the other end of the swing shaft fixed to the needle feeding assembly;

[0016] The swing link drives the swing shaft to rotate around the axis of the swing shaft via the second swing rod.

[0017] Furthermore, the needle feeding module also includes a first fixed seat and a second fixed seat that covers the first fixed seat, the output shaft passes through the first fixed seat, and the protruding end of the output shaft is fixed to the first swing rod;

[0018] The transmission assembly is disposed between the first fixed base and the second fixed base.

[0019] Furthermore, the needle feeding module also includes a first swing bearing, and the swing linkage is connected to the first swing rod and / or the second swing rod via the first swing bearing; and / or,

[0020] A second swing bearing is provided between the first fixed seat and the swing shaft.

[0021] Furthermore, the needle feeding assembly includes a needle feeding frame and a needle disposed at one end of the needle feeding frame, and the other end of the needle feeding frame is circumferentially linked to the swing axis.

[0022] Furthermore, the sewing machine also includes a positioning component and a housing, and the needle feeding module is detachably connected to a preset position on the housing via the positioning component.

[0023] One embodiment of the present invention also provides a fancy stitch, wherein a needle feeding assembly drives a decorative thread and a sewing thread on a needle assembly to form the fancy stitch, the needle feeding assembly being able to independently adjust the oscillation frequency and / or oscillation amplitude, and the fancy stitch being a combination of multiple stitch units;

[0024] The stitch unit is formed by changing the oscillation frequency and / or oscillation amplitude of the needle feeding assembly.

[0025] Furthermore, the stitch unit includes one of a first stitch, a second stitch, and a third stitch;

[0026] The decorative thread of the needle feeding assembly forms the first stitch with the first thread in the sewing thread of the needle assembly, depending on the swing amplitude of the needle feeding assembly.

[0027] Together with the first line and the second line, they form the second line trace.

[0028] The third line trace is formed together with the first line, the second line, and the third line.

[0029] Furthermore, the first stitch, the second stitch, and / or the third stitch can change their respective stitch widths according to the oscillation frequency of the needle feeding assembly.

[0030] One embodiment of the present invention provides a sewing machine in which the needle feeding component in the needle feeding module can be driven independently by the driving component, thereby allowing the oscillation frequency and / or oscillation amplitude of the needle feeding component to be adjusted independently, which is beneficial to changing the corresponding movement trajectory of the decorative thread, thereby realizing a variety of fancy stitch variations. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the structure of a sewing machine according to one embodiment of the present invention;

[0032] Figure 2 for Figure 1 A partially enlarged schematic diagram of the needle assembly in the sewing machine shown;

[0033] Figure 3 for Figure 1 The diagram shows a disassembly diagram of the needle feeding module in the sewing machine.

[0034] Figure 4 for Figure 3 The diagram shows the structure of the needle feeding module in the sewing machine after assembly, with some components omitted.

[0035] Figure 5 This is a schematic diagram of various fancy stitches formed after adjusting the oscillation frequency of the needle feeding assembly in one embodiment of the present invention;

[0036] Figure 6 This is a schematic diagram of various fancy stitches formed after adjusting the swing amplitude of the needle feeding assembly in another embodiment of the present invention;

[0037] Figure 7 This is a schematic diagram showing the relationship between the oscillation amplitude of the needle feeding assembly and the number of spindle rotations in one embodiment of the present invention.

[0038] Component designation explanation

[0039] 100. Sewing machine; 10. Housing; 20. Main shaft; 21. Needle drive assembly; 30. Needle assembly; 31. Needle chuck; 32. Short needle; 321. First thread; 33. Medium needle; 331. Second thread; 34. Long needle; 341. Third thread; 40. Needle feeding module; 41. Drive unit; 411. Output shaft; 42. Transmission assembly; 421. First swing arm; 422. Second swing arm assembly; 4221. Second swing arm; 4222. Swing shaft; 423. Swing connecting rod; 424. First fixed base; 425. Second fixed base; 426. First swing bearing; 427. Second swing bearing; 43. Needle feeding assembly; 431. Needle feeding frame; 432. Needle feeding; 50. Positioning component.

[0040] The above description of the main component symbols, in conjunction with the accompanying drawings and specific embodiments, provides a further detailed explanation of the present invention. Detailed Implementation

[0041] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not limit the scope of protection of this invention.

[0042] It should be noted that when a component is described as "mounted on" another component, it can be directly on the other component or there may be an intermediate component. When a component is described as "set on" another component, it can be directly set on the other component or there may be an intermediate component. When a component is described as "fixed to" another component, it can be directly fixed to the other component or there may be an intermediate component. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0043] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "or / and" as used herein includes any and all combinations of one or more of the associated listed items.

[0044] Please refer to the following: Figure 1 and Figure 2 , Figure 1 This is a schematic diagram of the structure of a sewing machine 100 according to one embodiment of the present invention; Figure 2 for Figure 1 A partially enlarged schematic diagram of the needle assembly 30 in the sewing machine 100 shown.

[0045] One embodiment of the present invention provides a sewing machine 100 for forming fancy stitches on a sewing fabric.

[0046] The sewing machine 100 includes a housing 10, a main shaft 20, a needle drive assembly 21, and a needle assembly 30. The main shaft 20 is disposed within the housing 10; the needle assembly 30 is connected to the main shaft 20 via the needle drive assembly 21. The main shaft 20 is connected to a power source and is used to drive the needle drive assembly 21; the needle drive assembly 21 is used to transmit the output power of the main shaft 20 to the needle assembly 30; the needle assembly 30 is used to pierce the sewing thread to the other side of the fabric and, together with other sewing threads, form fancy stitches on the fabric.

[0047] In this embodiment, other sewing threads include decorative thread disposed on the same side as the needle assembly 30, and bottom thread disposed on the opposite side of the needle assembly 30.

[0048] Of course, the sewing machine 100 also includes components such as a fabric feeding mechanism and a thread cutting mechanism to assist in completing fancy stitches, but these are not the focus of this application and will not be elaborated here.

[0049] In the sewing machine 100 that forms fancy stitches, such as Figure 2 As shown, the needle assembly 30 includes three sewing machine needles of different lengths and a needle holder 31. The three needles are, in sequence, a short needle 32, a medium needle 33, and a long needle 34. The tip of the short needle 32 is threaded with the first thread 321 of the sewing thread; the tip of the medium needle 33 is threaded with the second thread 331 of the sewing thread; and the tip of the long needle 34 is threaded with the third thread 341 of the sewing thread. When the power source drives the main shaft 20 to rotate, the needle transmission assembly 21 drives the needle holder 31 to move up and down reciprocally towards the fabric, thereby causing the short needle 32, medium needle 33, and long needle 34 to pierce the fabric and insert the corresponding first thread 321, second thread 331, and third thread 341 into the fabric.

[0050] It is understood that in other embodiments, the number of sewing machine needles in the needle assembly 30 may be other, such as one, two or more, and the length and number of sewing machine needles may be set according to the specific requirements of the fancy stitch.

[0051] The sewing machine 100 also includes a needle feeding assembly 43. The needle feeding assembly 43 is used to push the decorative thread above the sewing position on the fabric and form fancy stitches with the sewing threads on the short needle 32, medium needle 33 and long needle 34.

[0052] In existing sewing machines, the needle feeding assembly is often driven by the main shaft. However, the transmission structure between the main shaft and the needle feeding assembly is complex, requiring high precision in the transmission components, and the assembly process for these components is intricate. Furthermore, decorative threads, primarily serving a decorative purpose, play a crucial role in some garment manufacturing processes. However, due to the current structure, the decorative threads on the needle feeding assembly create limited patterns of fancy stitches, failing to meet the market's increasingly personalized demands.

[0053] Please refer to the following: Figures 3 to 7 , Figure 3 for Figure 1 A disassembly diagram of the needle feeding module 40 in the sewing machine 100 shown; Figure 4 for Figure 3 A schematic diagram of the assembled needle feeding module 40 of the sewing machine 100, omitting some components; Figure 5 This is a schematic diagram of various fancy stitches formed after adjusting the oscillation frequency of the needle feeding assembly 43 in one embodiment of the present invention. Figure 6 This is a schematic diagram of various fancy stitches formed after adjusting the swing amplitude of the needle feeding assembly 43 in another embodiment of the present invention; Figure 7 This is a schematic diagram showing the relationship between the swing amplitude of the needle feeding assembly 43 and the number of rotations of the main shaft 20 in one embodiment of the present invention.

[0054] To increase the variety of decorative threads driven by the needle feed assembly 43 and improve the ease of driving the needle feed assembly 43, the sewing machine 100 also includes a needle feed module 40. The needle feed module 40 is used to drive the decorative thread to form fancy stitches with the sewing thread on the needle assembly 30. The needle feed assembly 43 within the needle feed module 40 can be driven independently by the drive member 41. By separating the needle feed assembly 43 from the drive of the main shaft 20, it is easier to adjust the oscillation frequency and / or oscillation amplitude of the needle feed assembly 43, and it is also beneficial to change the corresponding movement trajectory of the decorative thread.

[0055] Specifically, such as Figure 3 and Figure 4 As shown, the needle feeding module 40 includes a drive component 41, a transmission assembly 42, and a needle feeding assembly 43. The drive component 41 is driven in coordination with the main shaft 20; one end of the transmission assembly 42 is connected to the output shaft 411 of the drive component 41; the needle feeding assembly 43 is connected to the other end of the transmission assembly 42. The drive component 41 serves as the power source for the needle feeding assembly 43, driving the transmission assembly 42 and the needle feeding assembly 43 to operate. The transmission assembly 42 transmits the power from the drive component 41 to the needle feeding assembly 43, driving the needle feeding assembly 43 to oscillate. The needle feeding assembly 43 drives the decorative thread above the fabric and forms a fancy stitch with the sewing thread of the needle assembly 30. The drive component 41 drives the needle feeding assembly 43 through the transmission assembly 42 and can adjust the oscillation frequency and / or oscillation amplitude of the needle feeding assembly 43.

[0056] It should be explained that the coordinated drive of the drive unit 41 and the main shaft 20 means that their combined drive enables the needle assembly 30 and the needle feeding assembly 43 to cooperate and form corresponding fancy stitches. When the drive unit 41 drives the needle feeding assembly 43 to push the decorative thread above the fabric, the main shaft 20 drives the needle assembly 30 to move towards the fabric, where it interweaves with the decorative thread to form fancy stitches on the fabric. The frequency of their combined drive maintains a certain regularity.

[0057] In this embodiment, the drive unit 41 and the main shaft 20 can be driven in a coordinated manner by the control module inside the sewing machine 100, which can coordinate the power sources of the drive unit 41 and the main shaft 20 to mutually compatible drive parameters.

[0058] The drive unit 41 has an output shaft 411. The output shaft 411 is connected to one end of the transmission assembly 42 and is used to output power to the transmission assembly 42.

[0059] Preferably, the drive component 41 is a motor. This configuration allows the entire sewing machine 100 to operate under the unified power of electricity.

[0060] In one embodiment, the ratio of the movement frequency of the spindle 20 to the movement frequency of the drive member 41 is a multiple. Furthermore, the movement frequency of the drive member 41 is the same as the oscillation frequency of the needle feed assembly 43. The movement frequency of the drive member 41 is changed so that the oscillation of the needle feed assembly 43 is intermittent: for example, if the spindle 20 rotates two revolutions, the needle assembly 30 runs twice, while the needle feed assembly 43 only oscillates once; in this case, since the needle feed assembly 43 does not participate in the formation of fancy stitches during the second run of the needle assembly 30, the fancy stitches formed by the decorative thread and the sewing thread of the needle assembly 30 are as follows... Figure 5 The first fancy line stitch shown from the left. By changing the movement frequency of the drive unit 41, various fancy line stitches can be created.

[0061] It is understandable that, in addition to the two-times relationship listed above, multiples can also be one-times or three-times or more.

[0062] Furthermore, the drive unit 41 changes the rotation angle of the output shaft 411 to alter the oscillation amplitude of the needle feeding assembly 43. The oscillation amplitude of the needle feeding assembly 43 is its oscillation angle. Figure 6 and Figure 7As shown, by changing the swing amplitude of the needle feeding assembly 43, the decorative thread of the needle feeding assembly 43 can be controlled to form different stitch units with the first thread 321, the first thread 321 + the second thread 331, or the first thread 321 + the second thread 331 + the third thread 341 of the needle assembly 30. The decorative thread interweaves only with the first thread 321 to form the first stitch A; the decorative thread interweaves with the first thread 321 + the second thread 331 to form the second stitch B; and the decorative thread interweaves with the first thread 321 + the second thread 331 + the third thread 341 to form the third stitch C. The distances between the short needle 32, the medium needle 33, and the long needle 34 of the needle assembly 30 and the swing center of the needle feeding assembly 43 increase sequentially.

[0063] Furthermore, if the two methods of adjusting the oscillation frequency and oscillation amplitude of the needle feeding component 43 are combined, more types of fancy stitches can be formed.

[0064] In one embodiment, the transmission assembly 42 includes a first rocker arm 421, a second rocker arm assembly 422, and a swing link 423. The first rocker arm 421 is connected to the output shaft 411 of the drive member 41. The second rocker arm assembly 422 is connected to the needle feeding assembly 43. The two ends of the swing link 423 are respectively connected to the first rocker arm 421 and the second rocker arm assembly 422. The first rocker arm 421 is used to output power from the output shaft 411 to the swing link 423. The swing link 423 causes the first swing to swing synchronously with the second rocker arm assembly 422. The second rocker arm assembly 422 is used to transmit power to the needle feeding assembly 43. When the output shaft 411 of the drive member 41 drives the first rocker arm 421 to swing, the swing link 423, driven by the first rocker arm 421, drives the second rocker arm assembly 422 to swing, thereby driving the needle feeding assembly 43 to swing. This configuration ensures that the first rocker arm 421 connected to the output shaft 411 is synchronously transmitted to the second rocker arm assembly 422, thereby driving the needle feeding assembly 43 to operate.

[0065] It is understood that in other embodiments, the transmission component 42 can also be other structures, such as a crank-rocker mechanism, as long as it can rotate the power of the output shaft 411 to the needle feeding component 43 and drive the needle feeding component 43 to run.

[0066] Furthermore, the second rocker arm assembly 422 includes a second rocker arm 4221 and a swing shaft 4222. The two ends of the second rocker arm 4221 are respectively connected to the swing connecting rod 423 and the swing shaft 4222; the other end of the swing shaft 4222 is fixed to the needle feeding assembly 43. The swing connecting rod 423 drives the swing shaft 4222 to rotate around its axis via the second rocker arm 4221. This configuration results in a simple overall structure for the transmission assembly 42 and facilitates assembly.

[0067] In one embodiment, the needle feeding module 40 further includes a first fixed base 424 and a second fixed base 425. A drive member 41 is correspondingly fixed to the first fixed base 424. The output shaft 411 of the drive member 41 passes through the first fixed base 424; the second fixed base 425 covers the first fixed base 424. The output shaft 411 passes through the first fixed base 424, and its protruding end is fixed to the first rocker arm 421. The aforementioned transmission assembly 42 is disposed between the first fixed base 424 and the second fixed base 425. Disposing the transmission assembly 42 between the first fixed base 424 and the second fixed base 425 allows the transmission assembly 42 to operate in a relatively enclosed environment, avoiding interference from external factors; and also facilitates the addition of lubricant to the transmission assembly 42.

[0068] In one embodiment, the needle feeding module 40 further includes a first swing bearing 426. The swing linkage 423 is connected to the first swing rod 421 and / or the second swing rod 4221 via the first swing bearing 426; and / or, a second swing bearing 427 is provided between the first fixed seat 424 and the swing shaft 4222. This arrangement can fix and reduce the coefficient of friction of the load during the transmission of the various components of the transmission assembly 42.

[0069] In one embodiment, the needle feeding assembly 43 includes a needle feeding frame 431 and a needle feeding 432 disposed at one end of the needle feeding frame 431. The other end of the needle feeding frame 431 is circumferentially linked to the swing shaft 4222. The needle feeding frame 431 is fixed to the outer periphery of the swing shaft 4222 and is used to load the needle feeding 432. The needle feeding 432 is used to push the decorative thread above the fabric so that the sewing thread of the needle assembly 30 and the decorative thread form a fancy stitch.

[0070] It should be explained that circumferential linkage means that the needle feeder 431 rotates synchronously with the swing shaft 4222. The swing center of the needle feeder 432 is the axis of the swing shaft 4222.

[0071] The needle feeder 431 is fixed to the outer periphery of the swing shaft 4222 by fasteners (not labeled). This arrangement facilitates adjustment of the mounting angle of the needle feeder 431 and allows the swing shaft 4222 to rotate synchronously. It is understood that in other embodiments, the needle feeder 431 can also form a circumferential linkage with the swing shaft 4222 in other ways, such as through a snap-fit ​​structure.

[0072] In one embodiment, the sewing machine 100 further includes a positioning element 50. The needle feeding module 40 is detachably connected to a preset position on the sewing machine 100 housing 10 via the positioning element 50. The preset position on the housing 10 is located outside the housing 10 and relatively close to the needle assembly 30. The needle feeding module 40 can be installed as a separate module outside the sewing machine 100 housing 10. This not only facilitates accurate loading or unloading of the needle feeding module 40, but also facilitates maintenance and adjustment of the needle feeding module 40. Furthermore, existing multiple transmission components located inside the sewing machine housing between the main shaft and the needle feeding assembly have a high risk of oil leakage, which can lead to internal malfunctions of the sewing machine 100; however, in this application, the needle feeding module 40 is modularly located outside the housing 10, which can avoid the risk of oil leakage inside the housing 10 and reduce malfunctions of the sewing machine 100.

[0073] In this embodiment, the positioning member 50 is fixed to the housing 10 by fasteners. It is understood that in other embodiments, the positioning member 50 can also be detachably fixed to the housing 10 by a snap-fit ​​structure or a plug structure, as long as the needle feeding module 40 can be positioned to the preset position of the housing 10.

[0074] One embodiment of the present invention provides a sewing machine in which the needle feeding component in the needle feeding module can be driven independently by the driving component, thereby allowing the oscillation frequency and / or oscillation amplitude of the needle feeding component to be adjusted independently, which is beneficial to changing the corresponding movement trajectory of the decorative thread, thereby realizing a variety of fancy stitch variations.

[0075] One embodiment of the present invention also provides a fancy stitch. The needle feed assembly 43 drives decorative thread and sewing thread on the needle assembly 30 to form the fancy stitch. The needle feed assembly 43 can independently adjust the oscillation frequency and / or oscillation amplitude, and the fancy stitch is a combination of various stitch units; wherein, the stitch units are formed by changing the oscillation frequency and / or oscillation amplitude of the needle feed assembly 43.

[0076] As mentioned in the above text, the stitch unit adjusts the number and position of interlacing between the decorative thread and the sewing thread of the needle assembly 30 by changing the oscillation frequency of the needle feed assembly 43 (intermittent oscillation, i.e., reducing the oscillation frequency of the needle feed assembly 43). By changing the oscillation amplitude of the needle feed assembly 43, the number of interlacings between the decorative thread and the sewing thread (first thread 321, second thread 331, and third thread 341) of the needle assembly 30 varies, thus correspondingly changing the pattern of the fancy stitch.

[0077] In one embodiment, the stitch unit includes one of a first stitch A, a second stitch B, and a third stitch C. The decorative thread of the needle feed assembly 43 forms a first stitch A with a first thread 321 in the sewing thread of the needle assembly 30, a second stitch B with a first thread 321 + a second thread 331, and a third stitch C with a first thread 321 + a second thread 331 + a third thread 341, depending on the swing amplitude (swing angle) of the needle feed assembly 43.

[0078] like Figure 6 The decorative stitches shown in the fourth column from the left, when the oscillation amplitude of the needle feeding assembly 43 is at its minimum, the needle feeding assembly 43 only feeds the decorative thread to the position of the single needle 32, and the decorative thread interweaves with the first thread 321 of the single needle 32 to form the first stitch A; as shown Figure 6 The decorative stitch shown in the third column from the left, when the needle feed assembly 43 swings to the position of the center needle 33, interweaves the decorative thread with the first thread 321 and the second thread 331 to form the second stitch B; as shown... Figure 6 As shown in the second column of fancy stitches from the left, when the needle feeding assembly 43 swings to its maximum amplitude and swings to the position of the long needle 34, the decorative line interweaves with the first line 321, the second line 331 and the third line 341 to form the third stitch C. Figure 7 The relationship between the oscillation amplitude of the needle feeding assembly and the number of spindle rotations shown can form as follows: Figure 6 The fancy stitches shown are in the first column from the left.

[0079] In one embodiment, the first stitch A, the second stitch B, and / or the third stitch C can change their respective stitch width W according to the oscillation frequency of the needle feed assembly 43. The stitch width W refers to the spacing between the stitch units (first stitch A, second stitch B, or third stitch C). When the oscillation frequency of the needle feed assembly 43 is changed to intermittent oscillation, the spacing between the corresponding stitch units (first stitch A, second stitch B, or third stitch C) increases accordingly.

[0080] Therefore, by comprehensively adjusting both the oscillation frequency and oscillation amplitude of the needle feeding assembly, the sewing machine can form a variety of different stitch units, thereby making fancy stitches more diversified to meet the needs of personalized customization of fancy stitches.

[0081] The technical features of the above embodiments can be combined in any way. For the sake of brevity, 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.

[0082] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A sewing machine, comprising a main shaft and a needle assembly, wherein the main shaft is used to drive the needle assembly to feed the needle, characterized in that, The sewing machine further includes a needle feeding module, which drives the decorative thread to form fancy stitches with the sewing thread on the needle assembly. The needle feeding module includes: The drive unit works in coordination with the spindle for driving; A transmission assembly, one end of which is connected to the output shaft of the drive component; The needle feeding assembly is connected to the other end of the transmission assembly; The drive unit drives the needle feeding assembly through the transmission component and can adjust the oscillation frequency and / or oscillation amplitude of the needle feeding assembly.

2. The sewing machine according to claim 1, characterized in that, The ratio of the spindle's movement frequency to the drive component's movement frequency is a multiple, and the drive component's movement frequency is the same as the needle feeding assembly's oscillation frequency.

3. The sewing machine according to claim 1, characterized in that, The transmission assembly includes: The first rocker arm is connected to the output shaft of the drive component; The second swing arm assembly is connected to the needle feeding assembly; A swing link is connected at both ends to the first swing arm and the second swing arm assembly, respectively. The swing link drives the second swing arm assembly to swing under the drive of the first swing arm, thereby driving the needle feeding assembly to operate.

4. The sewing machine according to claim 3, characterized in that, The second swing arm assembly includes a second swing arm and a swing shaft. The two ends of the second swing arm are respectively connected to the swing connecting rod and the swing shaft, and the other end of the swing shaft is fixed to the needle feeding assembly. The swing link drives the swing shaft to rotate around the axis of the swing shaft via the second swing rod.

5. The sewing machine according to claim 4, characterized in that, The needle feeding module further includes a first fixed seat and a second fixed seat that covers the first fixed seat. The output shaft passes through the first fixed seat, and the protruding end of the output shaft is fixed to the first swing rod. The transmission assembly is disposed between the first fixed base and the second fixed base.

6. The sewing machine according to claim 5, characterized in that, The needle feeding module further includes a first swing bearing, and the swing linkage is connected to the first swing rod and / or the second swing rod via the first swing bearing; and / or A second swing bearing is provided between the first fixed seat and the swing shaft.

7. The sewing machine according to claim 4, characterized in that, The needle feeding assembly includes a needle feeding frame and a needle disposed at one end of the needle feeding frame, and the other end of the needle feeding frame is circumferentially linked to the swing axis.

8. The sewing machine according to claim 1, characterized in that, The sewing machine also includes a positioning component and a housing, and the needle feeding module is detachably connected to a preset position on the housing via the positioning component.

9. A fancy stitch, wherein a needle feed assembly drives a decorative thread to form the fancy stitch with a sewing thread on a needle assembly, characterized in that, The needle feeding assembly can independently adjust the oscillation frequency and / or oscillation amplitude, and the fancy stitch is a combination of multiple stitch units; The stitch unit is formed by changing the oscillation frequency and / or oscillation amplitude of the needle feeding assembly.

10. The fancy stitch according to claim 9, characterized in that, The stitch unit includes one of a first stitch, a second stitch, and a third stitch; The decorative thread of the needle feeding assembly forms the first stitch with the first thread in the sewing thread of the needle assembly according to the swing amplitude of the needle feeding assembly. Together with the first line and the second line, they form the second line trace. The third line trace is formed together with the first line, the second line, and the third line.

11. The fancy stitch according to claim 10, characterized in that, The first stitch, the second stitch, and / or the third stitch can change their respective stitch widths according to the oscillation frequency of the needle feeding assembly.

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