CN109706628B - Sewing machine with adjustable track - Google Patents
Sewing machine with adjustable track Download PDFInfo
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- CN109706628B CN109706628B CN201910186082.6A CN201910186082A CN109706628B CN 109706628 B CN109706628 B CN 109706628B CN 201910186082 A CN201910186082 A CN 201910186082A CN 109706628 B CN109706628 B CN 109706628B
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- connecting rod
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Abstract
The invention provides a sewing machine with an adjustable track, which comprises: the outer peripheral surface of the tooth lifting eccentric wheel is divided into at least two sections along the axial direction, the circumferential contour lines of all the sections are different, and the circumferential contour line of the first section is circular; the feeding assembly comprises a feeding connecting rod and a feeding shaft arranged in parallel with the main shaft, and the feeding shaft drives the cloth feeding teeth to reciprocate back and forth under the driving of the feeding eccentric wheel; the feed lifting tooth assembly comprises a feed lifting tooth connecting rod and a feed lifting tooth shaft arranged in parallel with the main shaft, and when the feed lifting tooth connecting rod is matched with different sections on the feed lifting tooth eccentric wheel, the trajectory lines generated by driving the feed lifting tooth to move are different. The feed dog mechanism realizes different swing modes of the feed dog shaft by matching the feed dog connecting rod with different sections, and realizes different feed dog tracks by synthesizing the swing modes with the motion of the feed shaft.
Description
Technical Field
The invention relates to the technical field of sewing machines, in particular to a sewing machine with an adjustable track.
Background
The existing sewing machine which provides power for the feed dog through the spindle motor has the feed dog track which is generally an elliptical track, because the feed dog has low rising speed, the feed dog slowly lifts up the sewing material when sewing thicker sewing materials, and because the sewing materials have large friction force with the feed dog and the presser foot, the sewing materials are not fed, the sewing materials are layered and misplaced, and the sewing quality is seriously influenced.
Therefore, there is a need for a sewing machine with a modified feed dog trajectory, which can adapt to sewing materials with different thicknesses by changing the feed dog trajectory, thereby improving sewing quality.
Disclosure of Invention
In view of the above-mentioned shortcomings of the prior art, the present invention provides a sewing machine with an adjustable track, which is used for solving the problems that the track of a feed dog is not adjustable and the sewing material with different thickness cannot be adapted in the prior art.
To achieve the above and other related objects, the present invention provides a sewing machine with an adjustable track, comprising:
the lifting tooth feeding wheel set is arranged on the main shaft and synchronously rotates with the main shaft, the lifting tooth feeding wheel set comprises a lifting tooth eccentric wheel and a feeding eccentric wheel, the peripheral surface of the lifting tooth eccentric wheel is axially divided into at least two sections, the peripheral contour lines of all the sections are different, and the peripheral contour line of the first section is circular;
the feeding assembly comprises a feeding connecting rod and a feeding shaft arranged in parallel with the main shaft, one end of the feeding connecting rod is connected with the feeding eccentric wheel, the other end of the feeding connecting rod is connected with the feeding shaft, and the feeding shaft drives the cloth feeding teeth to reciprocate back and forth under the driving of the feeding eccentric wheel;
the feed lifting mechanism comprises a feed lifting assembly and a feed lifting assembly, wherein the feed lifting assembly comprises a feed lifting connecting rod and a feed lifting shaft arranged in parallel with a main shaft, one end of the feed lifting connecting rod is matched and connected with one section of the feed lifting eccentric wheel, the other end of the feed lifting connecting rod is connected with the feed lifting shaft, the feed lifting shaft drives a feed delivery tooth to reciprocate up and down under the driving of the feed lifting eccentric wheel, and when the feed lifting connecting rod is matched with different sections of the feed lifting eccentric wheel, the trajectory lines generated by the motion of the feed delivery tooth are different.
Preferably, the tooth lifting connecting rod is connected with a tooth lifting sliding groove which is fixedly arranged in a sliding mode, and the tooth lifting sliding groove is arranged in an inclined mode.
Preferably, the tooth lifting eccentric wheel is axially connected with the main shaft in a sliding and circumferential positioning manner, and is connected with the driving piece and driven by the driving piece to axially move, so that one end of the tooth lifting connecting rod is matched with different sections on the tooth lifting eccentric wheel.
Preferably, one end of the tooth lifting connecting rod is provided with a fork groove, and the fork groove is clamped on the tooth lifting eccentric wheel and is in contact with the outer peripheral surface of the first section or the second section of the tooth lifting eccentric wheel.
Preferably, the feed lifting eccentric wheel is fixedly connected with the feed lifting eccentric wheel, the feed lifting connecting rod is connected with the driving assembly, and one end of the feed lifting connecting rod axially moves on the feed lifting eccentric wheel under the driving of the driving assembly.
Preferably, the tooth lifting eccentric wheel is provided with three sections, the middle section is a transition section, and the second section and the first section are respectively positioned at two sides of the transition section.
Preferably, the circumferential contour line of the second section is composed of two concentric circular arc lines with different radiuses and a middle curve, the lifting tooth shaft does not swing when the lifting tooth connecting rod contacts with the circular arc line of the second section in the process that the main shaft drives the lifting tooth eccentric wheel to rotate, and the lifting tooth shaft swings when the lifting tooth connecting rod contacts with the middle curve of the second section, so that the cloth feeding tooth is driven to move to form a rectangular track line.
As described above, the sewing machine with adjustable track of the invention has the following beneficial effects: the feed lifting tooth eccentric wheel is axially divided into a plurality of sections, the circumferential contour lines of the sections are different, different swing modes of the feed lifting tooth shaft are realized by matching the feed lifting tooth connecting rod with different sections, and the feed lifting tooth eccentric wheel and the feed feeding shaft are synthesized to realize different feed feeding track; the applicability of the sewing material thickness of the sewing machine can be effectively improved, and the sewing performance is improved.
Drawings
FIG. 1 is a schematic view of the adjustable-track sewing machine of the present invention.
FIG. 2 is a schematic view of the lifting tooth assembly of the present invention.
Fig. 3 is a schematic view of the eccentric cam of the present invention.
Fig. 4 shows a schematic contour line of a second segment of the eccentric cam of the lifting tooth.
Fig. 5 shows the working principle of the matching of the lifting tooth connecting rod and the first section of the lifting tooth eccentric cam.
Fig. 6a shows the working feed dog of fig. 5 in relation to the rotation of the spindle in the Y-direction.
Fig. 6b shows the working feed dog of fig. 5 in a Z-direction as a function of the spindle rotation.
Fig. 6c shows the path of movement of the feed dog in operation as shown in fig. 5.
FIG. 7 is a schematic diagram of the operation of the cam follower link in cooperation with the second segment of the cam follower eccentric cam.
Fig. 8a shows the working feed dog of fig. 7 in relation to the rotation of the spindle in the Y-direction.
Fig. 8b shows the working feed dog of fig. 7 in a Z-direction as a function of the spindle rotation.
Fig. 8c shows the path of movement of the feed dog in operation as shown in fig. 7.
Description of the element reference numerals
1 spindle
2 feeding eccentric wheel
3 feeding connecting rod
4 oscillating seat
5 feeding shaft
6 eccentric cam of lifting tooth
63 first stage
62 transition section
63 second section
7 lifting tooth connecting rod
8 sliding block
9 lifting tooth chute
10 lifting rock shaft crank
11 lifting tooth shaft
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.
Please refer to fig. 1 to 8. It should be understood that the structures, ratios, sizes, and the like shown in the drawings are only used for matching the disclosure of the present disclosure, and are not used for limiting the conditions that the present disclosure can be implemented, so that the present disclosure is not limited to the technical essence, and any structural modifications, ratio changes, or size adjustments should still fall within the scope of the present disclosure without affecting the efficacy and the achievable purpose of the present disclosure. In addition, the terms "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not to be construed as a scope of the present invention.
As shown in fig. 1, the present invention provides a track-adjustable sewing machine, comprising:
the lifting tooth feeding wheel set comprises a main shaft 1 and a lifting tooth feeding wheel set which is arranged on the main shaft 1 and rotates synchronously with the main shaft 1, the lifting tooth feeding wheel set comprises a lifting tooth eccentric wheel 6 and a feeding eccentric wheel 2, the peripheral surface of the lifting tooth eccentric wheel 6 is divided into at least two sections along the axial direction, as shown in figure 3, the circumferential contour lines of all the sections are different, and the circumferential contour line of the first section 63 is circular;
the feeding assembly comprises a feeding connecting rod 3 and a feeding shaft 5 which is arranged in parallel with the main shaft 1, one end of the feeding connecting rod 3 is connected with the feeding eccentric wheel 2, the other end of the feeding connecting rod 3 is connected with the feeding shaft 5, and the feeding shaft 5 drives the cloth feeding teeth to reciprocate back and forth under the driving of the feeding eccentric wheel 2;
the feed lifting mechanism comprises a feed lifting tooth assembly and a feed lifting tooth assembly, wherein the feed lifting tooth assembly comprises a feed lifting tooth connecting rod 7 and a feed lifting tooth shaft 11 which is arranged in parallel with a main shaft 1, one end of the feed lifting tooth connecting rod 7 is connected with one section of the feed lifting tooth eccentric wheel 6 in a matched mode, the other end of the feed lifting tooth connecting rod 7 is connected with the feed lifting tooth shaft 11, the feed lifting tooth shaft 11 drives a feed conveying tooth to reciprocate up and down under the driving of the feed lifting tooth eccentric wheel 6, and when the feed lifting tooth connecting rod 7 is matched with different sections of the feed lifting tooth eccentric wheel 6, the trajectory lines generated by.
According to the invention, the feed dog eccentric wheel 6 is divided into a plurality of sections along the axial direction, the circumferential contour lines of each section are different, so that when the feed dog connecting rod 7 is matched with different sections, the swing modes of the feed dog shaft 11 are driven to be different, and the feed dog connecting rod and the swing modes of the feed shaft 5 are combined to realize the change of the feed dog track, so that the feed dog track is suitable for sewing of sewing materials with different thicknesses, and the sewing quality is improved.
Feeding assembly
One end of the feeding connecting rod 3 is sleeved on the feeding eccentric wheel 2, and the other end of the feeding connecting rod transmits power to the feeding shaft 5 through the swinging plate, the swinging seat 4 and the feeding crank, so that the rotary motion of the main shaft 1 is converted into the reciprocating swing of the feeding shaft 5, wherein the feeding crank is fixedly connected with the feeding shaft 5. In the embodiment, the feeding connecting rod 3 drives the feeding shaft 5 to swing back and forth under the driving of the main shaft 1, so that the front and back reciprocating motion of the feed dog is realized, and the front and back direction in the embodiment is the feeding direction of sewing materials in the sewing process, and is also called as the Y direction.
Feed lifting tooth assembly
In order to facilitate the lifting tooth connecting rod to drive the lifting tooth shaft to swing and realize the up-and-down movement of the cloth feeding tooth, as shown in fig. 2, in the embodiment, the lifting tooth connecting rod 7 is slidably connected with a fixed lifting tooth chute 9, the lifting tooth chute 9 is obliquely arranged, and the lifting tooth chute 9 is used for guiding and limiting the motion path of the lifting tooth connecting rod. In the embodiment, the feed lifting tooth chute 9 is fixedly connected with a shell of the sewing machine, the feed lifting tooth connecting rod 7 is fixedly provided with the sliding block 8, the sliding block 8 is arranged in the feed lifting tooth chute 9 in a sliding manner, and the feed lifting tooth connecting rod 7 is connected with the feed lifting tooth chute 9 in a sliding manner through the arrangement of the sliding block 8.
In order to connect the feed lifting rock shaft with the feed lifting rock connecting rod, a feed lifting rock crank 10 is fixedly arranged on the feed lifting rock shaft 11 in the embodiment, and the end part of the feed lifting rock connecting rod 7 is rotatably connected with the feed lifting rock crank 10. In the embodiment, the feed dog connecting rod 7 drives the feed dog shaft 11 to swing back and forth under the driving of the main shaft 1, so that the feed dog can move back and forth up and down, and the up and down direction in the embodiment is the direction perpendicular to the surface where the sewing material is located in the sewing process and is also called as the Z direction.
In order to facilitate the engagement of the cam rod 7 with the cam 6, the cam rod 7 has a fork groove at one end, which is engaged with the cam 6 and contacts the outer circumferential surface of the first section 63 or the second section 61 of the cam 6. The matching of the feed lifting tooth connecting rod 7 and the feed lifting tooth eccentric wheel 6 is not limited to this, and it is only required to satisfy the connection of the two to realize the power transmission.
In order to facilitate the matching of different sections of the feed lifting connecting rod and the feed lifting eccentric wheel, the feed lifting connecting rod can be manually adjusted through a disassembling machine, and can also be automatically realized by arranging a driving mechanism. If the eccentric cam 6 is adjusted manually, the eccentric cam 6 can be fixedly connected with the main shaft 1 through screws, a plurality of screw holes are additionally formed in the main shaft 1, and the eccentric cam 6 is fixed with different screw holes to change the axial position of the eccentric cam 6, so that the eccentric cam 6 is matched with different sections of the eccentric cam 6 without moving the connecting rod 7.
If the adjustment is automatic, as an embodiment, the above-mentioned cam 6 is axially slid and circumferentially positioned and connected with the main shaft 1, and the cam 6 is connected with a driving member (not shown) and is driven by the driving member to axially move, so that one end of the cam connecting rod 7 is matched with different sections on the cam 6. The driving piece of the embodiment can be an electromagnet, and the lifting tooth eccentric wheel 6 is pushed to axially slide along the main shaft by switching on and off the electromagnet. The specific manner of the axial sliding and circumferential positioning connection of the tooth lifting eccentric wheel 6 and the main shaft 1 in the embodiment can be as follows: the feed lifting eccentric wheel 6 and the main shaft 1 are respectively provided with an axially extending chute and a raised mechanism, axial sliding is realized through the chute and the raised structure, and the circumferential direction is limited, so that the main shaft 1 synchronously drives the feed lifting eccentric wheel to rotate when rotating.
As another embodiment, the feed lifting eccentric wheel 6 and the feed feeding eccentric wheel 2 can be fixedly connected, so that the installation is convenient; the two can also have no connection relation. In the embodiment, the feed lifting teeth connecting rod 7 is connected with the driving component, and one end of the feed lifting teeth connecting rod 7 is driven by the driving component to move axially on the feed lifting teeth eccentric wheel 6, so that one end of the feed lifting teeth connecting rod 7 is matched with different sections on the feed lifting teeth eccentric wheel 6.
The tooth lifting connecting rod 7 and the tooth lifting eccentric wheel 6 are matched in different sections, but not limited to the structure, axial relative motion is only required between the tooth lifting connecting rod and the tooth lifting eccentric wheel, and the main shaft rotates to drive the tooth lifting shaft to swing.
The following describes a specific embodiment of the feed dog eccentric and the motion trajectory of the feed dog in this embodiment.
As shown in fig. 3, the feed lifting eccentric wheel 6 is provided with three sections, and the middle section is a transition section 62 which does not participate in the drive of the feed lifting shaft; the second section 61 and said first section 63 are located on either side of the transition section 62. As shown in fig. 4, the circumferential contour line of the second segment 61 in this embodiment is composed of two concentric circular arc lines S1, S2 with different radii and middle curves S3, S4, which are called as cam profile with equal width, that is, at circular arc lines S1, S2, two groove walls of the fork groove of the tooth raising connecting rod 7 are always in contact with circular arc lines S1, S2; when the spindle 1 drives the cam lifter 6 to rotate, the cam lifter 11 does not swing when the cam lifter 7 contacts with the arc lines S1 and S2 of the second section 61, and the cam lifter 11 swings when the cam lifter 7 contacts with the middle curves S3 and S4 of the second section 61, so that the feed dog is driven to move to form a rectangular track line.
As shown in fig. 5, the fork groove of the feed lifting tooth connecting rod 7 is matched with the first section 63, at this time, the main shaft 1 is driven by the main shaft motor to rotate to drive the feed lifting tooth eccentric wheel 6 to rotate, and the first section 63 drives the feed lifting tooth connecting rod 7 to swing, so that the feed lifting tooth generates a feed lifting tooth rule curve in fig. 6b, wherein the feed lifting tooth rule curve is a relation curve between the feed lifting tooth and the main shaft rotation in the Z direction (the Z direction is the extension direction of the CD line in fig. 6 b); meanwhile, the feeding eccentric wheel 2 rotates to enable the cloth feeding teeth to generate a cloth feeding rule curve in fig. 6a, wherein the cloth feeding rule curve is a relation curve between the cloth feeding teeth in the Y direction (the Y direction is the extension direction of an AB line in fig. 6 a) and the rotation of the main shaft; the movement of the feed dog in the Z-direction and the Y-direction is combined to form a feed dog trajectory, see the elliptical trajectory in fig. 6 c.
As shown in fig. 7, the fork groove of the feed lifting connecting rod 7 is matched with the second section 61 of the feed lifting eccentric wheel 6, when the feed lifting connecting rod 7 is in contact with the circular arc lines S1 and S2 of the second section 61, the feed lifting shaft 11 stops swinging in the process of rotation of the feed lifting eccentric wheel 6, the tooth height is reflected to be kept unchanged in the feed lifting track, as shown in a straight line segment in the feed lifting rule curve shown in fig. 8b, the feed lifting height C, D is observed to be unchanged in the straight line segment, the temporary stopping of the feed lifting shaft 11 and the swinging of the feed feeding shaft 5 are realized, the swinging of the feed feeding shaft 5 generates the feed lifting rule curve shown in fig. 8a, and the two motions are combined to form a horizontal part in the feed lifting tooth track shown in fig. 8 c; when the feed lifting tooth connecting rod 7 is contacted with the middle curves S3 and S4 of the second section 61, the feed lifting tooth shaft 11 swings back and forth, the feed lifting tooth moves up and down, the temporary swing of the feed lifting tooth shaft 11 and the swing of the feed shaft 5 are combined, a high-degree direction track in a feed lifting tooth track line shown in figure 8c is formed, and finally an approximately rectangular track line shown in figure 8c is formed.
As can be seen from fig. 8c, in the rectangular track line of the feed dog, the feed dog basically vertically ascends and descends in the CD direction, so that compared with the elliptical track line in fig. 6c, the feed dog has strong feed capability, can effectively overcome the phenomena of sewing dislocation and the like, has obvious effect when sewing thick materials at low speed, effectively improves the sewing performance, and is suitable for sewing thick materials. Therefore, when thick materials are sewn, the axial position of the cam 6 of the lifting tooth is only required to be adjusted, and the second section 61 on the cam is matched with the connecting rod 7 of the lifting tooth.
The circumferential contour line of the second section on the feed lifting eccentric wheel is not limited to the above, and the feed lifting eccentric wheel can also be in other shapes, so that the feed lifting eccentric wheel can form an irregular shape required by sewing.
In conclusion, the track-adjustable sewing machine has the advantages that the cam eccentric wheel is axially divided into a plurality of sections, the circumferential contour lines of the sections are different, different swing modes of the cam shaft are realized by matching the cam connecting rod with different sections, and the cam eccentric wheel and the feed shaft are synthesized to realize different feed track; the applicability of the sewing material thickness of the sewing machine can be effectively improved, and the sewing performance is improved. Therefore, the invention effectively overcomes various defects in the prior art and has high industrial utilization value.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (7)
1. An adjustable trajectory sewing machine comprising:
the lifting tooth feeding wheel set is arranged on the main shaft and synchronously rotates with the main shaft, the lifting tooth feeding wheel set comprises a lifting tooth eccentric wheel and a feeding eccentric wheel, the peripheral surface of the lifting tooth eccentric wheel is axially divided into at least two sections, the peripheral contour lines of all the sections are different, and the peripheral contour line of the first section is circular;
the feeding assembly comprises a feeding connecting rod and a feeding shaft arranged in parallel with the main shaft, one end of the feeding connecting rod is connected with the feeding eccentric wheel, the other end of the feeding connecting rod is connected with the feeding shaft, and the feeding shaft drives the cloth feeding teeth to reciprocate back and forth under the driving of the feeding eccentric wheel;
the feed lifting mechanism comprises a feed lifting assembly and a feed lifting assembly, wherein the feed lifting assembly comprises a feed lifting connecting rod and a feed lifting shaft arranged in parallel with a main shaft, one end of the feed lifting connecting rod is matched and connected with one section of the feed lifting eccentric wheel, the other end of the feed lifting connecting rod is connected with the feed lifting shaft, the feed lifting shaft drives a feed delivery tooth to reciprocate up and down under the driving of the feed lifting eccentric wheel, and when the feed lifting connecting rod is matched with different sections of the feed lifting eccentric wheel, the trajectory lines generated by the motion of the feed delivery tooth are different.
2. The adjustable trajectory sewing machine of claim 1, wherein: the lifting tooth connecting rod is connected with a fixed lifting tooth sliding groove in a sliding mode, and the lifting tooth sliding groove is arranged in an inclined mode.
3. The adjustable trajectory sewing machine of claim 2, wherein: the lifting tooth eccentric wheel is axially connected with the main shaft in a sliding and circumferential positioning mode, connected with the driving piece and driven by the driving piece to axially move, so that one end of the lifting tooth connecting rod is matched with different sections on the lifting tooth eccentric wheel.
4. The adjustable trajectory sewing machine of claim 2, wherein: one end of the tooth lifting connecting rod is provided with a fork groove, and the fork groove is clamped on the tooth lifting eccentric wheel and is in contact with the peripheral surface of the first section or the second section of the tooth lifting eccentric wheel.
5. The adjustable trajectory sewing machine of claim 1, wherein: the feed lifting eccentric wheel is fixedly connected with the feed lifting eccentric wheel, the feed lifting connecting rod is connected with the driving assembly, and one end of the feed lifting connecting rod axially moves on the feed lifting eccentric wheel under the driving of the driving assembly.
6. The adjustable trajectory sewing machine of claim 1, wherein: the tooth lifting eccentric wheel is provided with three sections, the middle section is a transition section, and the second section and the first section are respectively positioned at two sides of the transition section.
7. The adjustable trajectory sewing machine of claim 6, wherein: the circumferential contour line of the second section is composed of two concentric arc lines with different radiuses and a middle curve, the lifting tooth shaft does not swing when the lifting tooth connecting rod is in contact with the arc line of the second section in the process that the main shaft drives the lifting tooth eccentric wheel to rotate, and the lifting tooth shaft swings when the lifting tooth connecting rod is in contact with the middle curve of the second section, so that the cloth feeding tooth is driven to move to form a rectangular track line.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910186082.6A CN109706628B (en) | 2019-03-12 | 2019-03-12 | Sewing machine with adjustable track |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910186082.6A CN109706628B (en) | 2019-03-12 | 2019-03-12 | Sewing machine with adjustable track |
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| CN109706628A CN109706628A (en) | 2019-05-03 |
| CN109706628B true CN109706628B (en) | 2021-01-01 |
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| CN201910186082.6A Active CN109706628B (en) | 2019-03-12 | 2019-03-12 | Sewing machine with adjustable track |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112226929B (en) * | 2020-10-07 | 2022-11-11 | 浙江杜马缝纫机股份有限公司 | Flush joint machine |
| CN112575456B (en) * | 2020-12-01 | 2022-07-05 | 杰克科技股份有限公司 | Cloth feeding device for realizing quasi-rectangular tooth track and sewing machine |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3871311A (en) * | 1973-11-15 | 1975-03-18 | Singer Co | Adjustable eccentric for sewing machines |
| US4125844A (en) * | 1976-01-15 | 1978-11-14 | U.S. Philips Corporation | Magnetic position marker for a tape recorder using magnetically alignable particles for making the mark |
| JPS63163772U (en) * | 1987-04-15 | 1988-10-25 | ||
| JP2002276762A (en) * | 2001-03-19 | 2002-09-25 | Brother Ind Ltd | Cam following mechanism |
| JP2008104718A (en) * | 2006-10-26 | 2008-05-08 | Juki Corp | Feed mechanism of sewing machine |
| JP2009061177A (en) * | 2007-09-07 | 2009-03-26 | Juki Corp | Cam following mechanism for sewing machine |
| CN106835514B (en) * | 2016-10-10 | 2020-07-24 | 阮晨航 | Mop wheel and tooth synchronous adjusting system of lockstitch sewing machine |
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2019
- 2019-03-12 CN CN201910186082.6A patent/CN109706628B/en active Active
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Address after: 318010 No. 1008, east section of Donghai Avenue, Sanjia, Jiaojiang District, Taizhou City, Zhejiang Province Patentee after: Jack Technology Co.,Ltd. Address before: 318010 No. 15 Airport South Road, Jiaojiang District, Zhejiang, Taizhou Patentee before: JACK SEWING MACHINE Co.,Ltd. |