CN109989184B - Backstitch adjusting mechanism and sewing machine using same - Google Patents
Backstitch adjusting mechanism and sewing machine using same Download PDFInfo
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- CN109989184B CN109989184B CN201910340459.9A CN201910340459A CN109989184B CN 109989184 B CN109989184 B CN 109989184B CN 201910340459 A CN201910340459 A CN 201910340459A CN 109989184 B CN109989184 B CN 109989184B
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- backstitch
- adjusting
- sewing machine
- electric control
- transmission assembly
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- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B27/00—Work-feeding means
- D05B27/02—Work-feeding means with feed dogs having horizontal and vertical movements
-
- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B27/00—Work-feeding means
- D05B27/22—Work-feeding means with means for setting length of stitch
-
- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05D—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES D05B AND D05C, RELATING TO SEWING, EMBROIDERING AND TUFTING
- D05D2209/00—Use of special materials
- D05D2209/08—Use of special materials elastic, e.g. rubber spring
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Sewing Machines And Sewing (AREA)
Abstract
The invention provides a backstitch adjusting mechanism which is applied to a sewing machine and comprises an electric control assembly and a transmission assembly, wherein the electric control assembly comprises an electric control element and a buffer element, and the buffer element is arranged relative to the electric control element and can buffer the movement of the electric control element; the electric control element is connected to a feeding mechanism of the sewing machine through the transmission assembly, can move under the electric control action of an external control center, adjusts the needle pitch of the feeding mechanism through the transmission assembly, and realizes backstitch of the sewing machine. The invention also provides a sewing machine which comprises a backstitch adjusting mechanism, wherein the backstitch adjusting mechanism is any one of the backstitch adjusting mechanisms. The backstitch adjusting mechanism provided by the invention utilizes the buffer element to reduce the impact and vibration of the electric control element, and utilizes the damping effect of the buffer element to improve the reliability and stability of the sewing machine, thereby having wide application prospect.
Description
Technical Field
The invention relates to the technical field of sewing, in particular to a backstitch adjusting mechanism and a sewing machine using the same.
Background
The sewing machine is mainly used for serging and sewing textiles and has wide application in the industrial and civil fields. Sewing machines often use backstitch to reinforce the fabric during the beginning and end of sewing. However, the existing sewing machine can generate larger noise during backstitch operation, the operation experience of a user is influenced by the existence of the noise, and the reliability and the stability of the sewing machine are also reduced.
Disclosure of Invention
In view of the above, there is a need for an improved backstitch adjusting mechanism and a sewing machine using the same, which can reduce the noise of the sewing machine when backstitch adjustment is realized and has a wide application prospect.
The invention provides a backstitch adjusting mechanism which is applied to a sewing machine and comprises an electric control assembly and a transmission assembly, wherein the electric control assembly comprises an electric control element and a buffer element; the electric control element is connected to a feeding mechanism of the sewing machine through the transmission assembly, and moves under the action of electric power and drives the transmission assembly to adjust the needle pitch of the feeding mechanism.
Further, the damping element is a hydraulic damper.
Furthermore, the electric control element comprises a coil and an adjusting piece connected to the transmission assembly, and the adjusting piece can adjust the needle pitch of the feeding mechanism under the suction action of the coil and realize the backstitch of the sewing machine.
Furthermore, the electric control assembly comprises a fixed frame, and the fixed frame is arranged on a shell of the sewing machine and bears the electric control element and the adjusting piece.
Furthermore, a groove is formed in the part, extending out of the fixing frame, of the adjusting piece, a fixing ring is embedded in the groove, and the fixing ring stops and limits the movement stroke of the adjusting piece.
Further, backstitch adjustment mechanism includes the metal gasket, the metal gasket cover is established the regulating part and set up in between regulating part and the mount.
Further, backstitch adjustment mechanism includes the elastic gasket, the elastic gasket cover establish the regulating part and set up in between metal gasket and the mount.
Further, the electric control element is an electromagnet, and the adjusting piece is an iron core.
Further, the transmission assembly adopts at least one of connecting rod transmission, belt transmission and gear transmission.
The invention also provides a sewing machine which comprises a backstitch adjusting mechanism, wherein the backstitch adjusting mechanism is any one of the backstitch adjusting mechanisms.
The backstitch adjusting mechanism provided by the invention utilizes the buffer element to reduce the impact and vibration of the electric control element, and utilizes the damping effect of the buffer element to improve the reliability and stability of the sewing machine, thereby having wide application prospect.
Drawings
FIG. 1 is a schematic structural view of a backstitch adjustment mechanism according to an embodiment of the present invention;
FIG. 2 is a schematic view of the backstitch adjusting mechanism shown in FIG. 1 after being applied to a sewing machine;
FIG. 3 is a schematic view of the backstitch adjustment mechanism shown in FIG. 2 from another perspective;
FIG. 4 is an enlarged schematic view of the sewing machine of FIG. 2 at A;
FIG. 5 is a disassembled schematic view of the backstitch adjustment mechanism shown in FIG. 1;
FIG. 6 is a schematic view of the backstitch adjustment mechanism of FIG. 1 in an inoperative condition;
FIG. 7 is a schematic structural view of the backstitch adjusting mechanism shown in FIG. 1 in an operating state;
FIG. 8 is a disassembled schematic view of the backstitch adjustment mechanism shown in FIG. 1;
fig. 9 is a graph showing the speed change of the iron core when the hydraulic damper is used as the damping member 30;
fig. 10 is a graph showing the speed change of the iron core when the buffer member 30 employs a spring.
Description of the main elements
The following detailed description will further illustrate the invention in conjunction with the above-described figures.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It will be understood that when an element is referred to as being "mounted on" another element, it can be directly mounted on the other element or intervening elements may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present. When an element is referred to as being "secured to" another element, it can be directly secured to the other element or intervening elements may also be present.
Unless defined otherwise, 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 belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "or/and" includes any and all combinations of one or more of the associated listed items.
Referring to fig. 1 to 3, fig. 1 is a schematic structural diagram of a backstitch adjusting mechanism 100 according to an embodiment of the present invention, fig. 2 is a schematic structural diagram of the backstitch adjusting mechanism 100 shown in fig. 1 after being applied to a sewing machine 200, and fig. 3 is a schematic structural diagram of the backstitch adjusting mechanism 100 shown in fig. 2 at another viewing angle.
The invention provides a backstitch adjusting mechanism 100 which is used for controlling and adjusting the sewing mode of a sewing machine 200, so that the sewing machine 200 is in a backstitch state, and the cloth is reinforced by using a backstitch processing mode.
In the present embodiment, the sewing machine 200 is a flat sewing machine that sews a fabric using a lock stitch formed by interlacing a needle thread and a shuttle thread. It is understood that in other embodiments, the sewing machine 200 may be a flat-seam machine, a cup-seam machine, or other types of sewing devices other than flat-seam machines, as long as the sewing machine can apply the backstitch adjusting mechanism 100 provided by the present invention.
Specifically, the backstitch adjusting mechanism 100 is connected to a feeding mechanism 210 in the sewing machine 200, the feeding mechanism 210 is used for reciprocally conveying the sewing material, and the backstitch adjusting mechanism 100 controls the sewing machine 200 to a backstitch mode by adjusting the feeding direction of the feeding mechanism 210 so that the feeding mechanism 210 reversely conveys the sewing material.
The feeding mechanism 210 comprises a main shaft 211, a feed lifting tooth shaft 212, a feeding shaft 213, a first lifting tooth transmission assembly 214 and a second lifting tooth transmission assembly 215, wherein the lifting tooth shaft 212, the feeding shaft 213 and the main shaft 211 are approximately parallel, the main shaft 211 is driven by a main motor (not shown) to rotate, and the lifting tooth shaft 212 can be driven to swing back and forth around the axis of the main shaft under the eccentric transmission action of the first lifting tooth transmission assembly 214; accordingly, the main shaft 211 can drive the feeding shaft 213 to swing back and forth around the axis of the main shaft under the action of the eccentric rotation of the second feed dog transmission assembly 215.
A tooth holder 216 is arranged at one end of the feed shaft 213 far away from the first tooth lifting transmission component 214 and the second tooth lifting transmission component 215, a first feeding transmission component 217 is arranged between the tooth holder 216 and the feed shaft 212, and a second feeding transmission component 218 is arranged between the tooth holder 216 and the feed shaft 213. The feed lifting shaft 212 is driven to the tooth rack 216 through the first feeding transmission component 217 to do reciprocating motion around the axis of the feed lifting shaft, and drives the tooth rack 216 to do reciprocating motion up and down; the reciprocating swing of the feeding shaft 213 around the axis thereof is transmitted to the tooth holder 216 through the second feeding transmission assembly 218, and drives the tooth holder 216 to reciprocate back and forth. The tooth frame 216 is driven by the feed shaft 213 and the feed shaft 212 to make a combined motion of reciprocating up and down and reciprocating back and forth, and the motion track is similar to an ellipse, so that cloth is transferred in the back and forth direction.
The gripper 216 moves the cloth a certain distance each time it reciprocates, and this distance determines the size of the needle pitch. The larger the distance that the tooth frame 216 reciprocates once and drags the cloth to move is, the larger the needle pitch of the sewing machine 200 is; the smaller the distance that the gripper 216 reciprocates once and drags the cloth, the smaller the needle pitch of the sewing machine 200.
In the reverse sewing, the feed is dragged in the opposite direction for a certain distance every time the gripper 216 reciprocates, and the direction of the feed of the gripper 216 is opposite to the direction of the feed during the forward sewing, which is the reverse sewing mode of the sewing machine 200.
Referring to fig. 4, fig. 4 is an enlarged schematic view of the sewing machine 200 shown in fig. 2 at a. The needle pitch of the sewing machine 200 is determined by the second feed dog driving unit 215 which controls the feed dog frame 216 to reciprocate back and forth. The second feed lifting transmission assembly 215 comprises an eccentric wheel 2151, a feeding connecting rod 2152, a mounting seat 2153, a first swing arm 2154, a second swing arm 2155 and a driving crank 2156, wherein the eccentric wheel 2151 is arranged on the main shaft 211, one end of the feeding connecting rod 2152 is sleeved on the outer side surface of the eccentric wheel 2151, and the other end of the feeding connecting rod 2152 is coaxially hinged with the first swing arm 2154 and the second swing arm 2155; the number of the first swing arms 2154 and the second swing arms 2155 is two, and the two first swing arms 2154 and the two second swing arms 2155 are distributed in an axisymmetric manner by taking the feeding connecting rod 2152 as a shaft; one end of the first swing arm 2154 is coaxially hinged with the feeding connecting rod 2152 and the second swing arm 2155, and the other end is hinged with the driving crank 2156; one side of the second swing arm 2155, which is far away from the feeding connecting rod 2152, is hinged and arranged on the mounting seat 2153; one end of the driving crank 2156 is hinged to two second swing arms 2155 which are distributed in an axisymmetrical manner, and the other end is fixedly connected to the feeding shaft 213.
In the feeding process, the rotation of the main shaft 211 drives the feeding connecting rod 2152 to perform reciprocating telescopic motion through the eccentric wheel 2151, the feeding connecting rod 2152 drives the driving crank 2156 to perform reciprocating telescopic motion by taking the mounting seat 2153 as a reference through the first swing arm 2154 and the second swing arm 2155, and the reciprocating telescopic motion of the driving crank 2156 drives the feeding shaft 213 to perform reciprocating swing by the axis of the feeding shaft 213.
The swing of the feed shaft 213 is relative movement based on the mount 2153, and if the position of the mount 2153 itself is changed, the relative movement of the feed shaft 213 based on the mount 2153 is changed. Therefore, the sewing machine 200 can realize the backstitch mode by changing the angle and position of the mounting seat 2153 in the feeding mechanism 210, and adjusting the stroke of the reciprocating motion of the tooth frame 216 by changing the swing amplitude of the feeding shaft 213 driven by the main shaft 211 and the second feed lifting tooth transmission assembly 215, thereby changing the needle pitch of the sewing machine 200 and realizing the backstitch.
It is understood that, in addition to the above-described stitch length adjustment, in other embodiments, the sewing machine 200 may adopt other stitch length adjustment manners besides the adjustment of the swing amplitude of the mounting seat 2153; that is, the backstitch adjustment mechanism 100 is not limited to being able to attach to the mount 2153, and in other embodiments, the backstitch adjustment mechanism 100 may be attached to components other than the mount 2153 to achieve gauge and backstitch adjustment.
Of course, in the sewing machine 200, besides the feeding mechanism 210 described above, other mechanisms such as a housing (not shown), a driving mechanism (not shown), a sewing mechanism (not shown), a thread passing mechanism (not shown) and the like are also disposed inside to comprehensively complete the sewing work of the fabric.
The backstitch adjusting mechanism 100 is electrically connected with an external control center through a cable, wireless transmission and the like, can move under the electric control action of the external control center, and drives the mounting seat 2153 in the second feed lifting transmission assembly 215 to swing to a preset angle, so that the relative movement form of the feeding shaft 213 based on the mounting seat 2153 is changed, and the stroke of the reciprocating movement back and forth of the adjusting tooth frame 216 arranged on the feeding shaft 213 is arranged, and the backstitch is realized.
It should be noted that the external control center may be a control center of the sewing machine 200, or an additional controller may be provided in the sewing machine 200 to serve as a control center of the backstitch adjusting mechanism 100.
Referring to fig. 5 to 7, fig. 5 is a disassembled schematic view of the backstitch adjusting mechanism 100 shown in fig. 1, fig. 6 is a structural schematic view of the backstitch adjusting mechanism 100 shown in fig. 1 in a non-operating state, and fig. 7 is a structural schematic view of the backstitch adjusting mechanism 100 shown in fig. 1 in an operating state.
The backstitch adjusting mechanism 100 comprises an electric control assembly 10 and a transmission assembly 20, wherein the electric control assembly 10 is mounted on a shell assembly (not shown) in the sewing machine 200 and connected with the transmission assembly 20, and the electric control assembly 10 is electrically connected with an external control center and can move under the electric control action of the external control center; the transmission assembly 20 is used for transmitting control actions of the electronic control assembly 10 to adjust the swinging angle of the mounting seat 2153.
The electric control assembly 10 comprises an electric control element 11, and the electric control element 11 is mounted on the shell assembly of the sewing machine 200 and can move under the action of an external electric control center.
In this embodiment, the electronic control element 11 is an electromagnet, and when the external control center controls the electromagnet to be powered on, the electromagnet moves and transmits the control action of the electromagnet to the mounting seat 2153 through the transmission assembly 20; the installation seat 2153 is controlled by utilizing the electromagnetic attraction principle, so that the cost performance is better, and the anti-interference capability to a complex environment is stronger.
Specifically, the electric control element 11 includes a coil 111 and an adjusting member 112, the coil 111 is connected to an external control center by a cable or the like, and the adjusting member 112 is accommodated in the coil 111 and has one end connected to the transmission assembly 20. When the coil 111 is energized, the electromagnetic force generated by the coil 111 attracts the adjusting member 112, so that the adjusting member 112 moves along the axial direction thereof, and the transmission assembly 20 adjusts the swing angle of the mounting seat 2153, thereby implementing backstitch.
Of course, in other embodiments, the electromagnet may be an electric control element other than the electromagnet, such as an air cylinder or a hydraulic cylinder; as long as the electronic control element can adjust the swing angle of the mounting base 2153 through the transmission assembly 20. In the present embodiment, the adjuster 112 is an iron core. It is understood that in other embodiments, the adjustment member 112 may employ other elements besides an iron core.
The transmission assembly 20 adopts a link transmission structure, and is formed by hinging a plurality of transmission links. It is understood that in other embodiments, the transmission assembly 20 may also adopt other transmission methods such as a belt transmission, a gear transmission, etc. to transmit the adjusting action of the electric control element 11, as long as the transmission assembly 20 can adjust the swing angle of the mounting base 2153.
In order to reduce noise caused by vibration due to impact of an electric control element 11 in the backstitch adjusting process in the sewing machine 200, the backstitch adjusting mechanism 100 provided by the invention is provided with the buffer element 30 at the corresponding position of the electric control element 11, and the buffer element 30 is opposite to the electric control element 11 and is used for absorbing vibration and reducing noise, so that the reliability and stability of the sewing machine 200 are improved, the working volume of the sewing machine 200 is reduced, and the working safety of operators is guaranteed.
Referring to fig. 9 and 10 together, fig. 9 is a speed variation curve of the iron core when the hydraulic damper is used as the buffering element 30, and fig. 10 is a speed variation curve of the iron core when the spring is used as the buffering element 30.
In the present embodiment, the buffer element 30 is a hydraulic damper, which absorbs the impact vibration of the electric control element 11 by using hydraulic damping, and absorbs the impact energy of the electric control element 11 to reduce vibration and dissipate energy; the principle of the damping efficiency of the hydraulic damper is realized by utilizing the circulation loss of the moving oil between the internal damping holes, and the faster the external impact speed is, the better the damping and energy dissipation effects of the hydraulic damper are; the hydraulic damper can rely on larger buffering capacity to decelerate the iron core during recoil, which is different from the performance and principle that the traditional buffering parts such as springs can only weaken the acceleration of the movement of the iron core and cannot reduce the speed of the iron core (the iron core is thrown in an acceleration stage).
If the speed of the iron core is reduced only by the elastic elements such as the spring, the elastic elements such as the spring are energy storage elements and do not have the energy dissipation capacity; therefore, the movement state of the iron core is adjusted by the elastic member such as the spring, the movement state is only expressed by adjusting the movement acceleration of the iron core, the movement speed of the iron core cannot be reduced in a damping energy dissipation mode, and the noise reduction effect of backstitch adjustment is not achieved. Further, the spring-back phenomenon inevitably occurs after the elastic member such as a spring is compressed to a certain degree, which makes it impossible to hold the iron core in the backstitch state. Therefore, the invention utilizes the hydraulic damper to buffer the speed of the movement of the iron core, and has better performance advantage. In one embodiment of the present invention, the electronic control element 11 further includes a fixing frame 113, the cross section of the fixing frame 113 is substantially rectangular, the coil 111 and the adjusting member 112 are both disposed at one end of the fixing frame 113, and the buffering element 30 is disposed at the other end of the fixing frame 113 opposite to the adjusting member 112. The adjusting member 112 extends out of the fixing frame 113 and is connected to the driving assembly 20.
Referring to fig. 8, fig. 8 is a disassembled view of the backstitch adjusting mechanism 100 shown in fig. 1. The portion of the adjusting member 112 extending out of the fixing frame 113 is provided with a groove 1121, the groove 1121 extends along the circumferential direction of the adjusting member 112, a fixing ring 114 is clamped in the groove 1121, and the fixing ring 114 is embedded in the groove 1121 so as to limit the moving stroke of the adjusting member 112. The fixing ring 114 has an opening (not numbered) to facilitate smooth installation into the recess 1121.
When the adjusting member 112 moves under the electromagnetic attraction of the coil 111 in the energized state, the fixing ring 114 can stop at the fixing frame 113, so as to limit the further movement of the adjusting member 112 and prevent the movement of the adjusting member 112 and the coil 111 from being disengaged.
Further, a metal gasket 115 is arranged between the fixing ring 114 and the fixing frame 113, the metal gasket 115 is sleeved on the adjusting member 112, the metal gasket 115 is made of a metal material, and when the fixing ring 114 stops further movement of the adjusting member 112, the metal gasket 115 can bear friction with the fixing frame 113, so that direct abrasion of the fixing ring 114 is avoided.
Furthermore, an elastic gasket 116 is disposed between the metal gasket 115 and the fixing frame 113, the elastic gasket 116 is made of soft material such as rubber, and when the fixing ring 114 stops further movement of the adjusting member 112, the elastic gasket 116 can further reduce vibration of the adjusting member 112 and absorb vibration energy of the adjusting member 112.
In addition, the elastic pad 116 cooperates with the buffering element 30 to achieve vibration damping and energy dissipation on the adjusting member 112 at two ends, which is not only beneficial to improving the buffering effect and efficiency, but also beneficial to improving the motion stability of the adjusting member 112. Compared with single-side energy dissipation, the double-side energy dissipation mode is not simple superposition of single-side efficiency, but mutual improvement of effects.
In one embodiment of the present invention, one end of the adjusting member 112 away from the buffering element 30 is opened with a through hole 1122, the through hole 1122 penetrates through the end surface and the outer side surface of the adjusting member 112 along the radial direction of the adjusting member 112 and makes one end of the adjusting member 112 form two wings 1123; the adjusting piece 112 is provided with a connecting piece 117, the connecting piece 117 penetrates through the two wing plates 1123, one end of the connecting piece 117 is in clamping fit with one of the wing plates 1123, and the other end of the connecting piece 117 extends out of the other wing plate 1123 and is connected to the transmission assembly 20. At this point, the adjustment member 112 forms an interconnection with the drive assembly 20.
Further, one end of the connecting member 117 is rotatably connected to the transmission assembly 20, and since the transmission assembly 20 adopts a link transmission structure, the rotational connection between the connecting member 117 and the transmission assembly 20 can eliminate the angular deviation between the connecting member 117 and the transmission assembly 20, so that the adjusting member 112 only uses its own movement to transmit the movement to the transmission assembly 20, and the adjustment is more accurate.
Of course, the adjusting member 112 may be connected to the transmission assembly 20 in other manners as long as the posture adjustment of the adjusting member 112 can be transmitted to the mounting seat 2153 through the transmission assembly 20 and the backstitch process of the sewing machine 200 is realized.
The backstitch adjusting mechanism 100 provided by the invention utilizes the buffer element 30 to reduce the impact and vibration of the electric control element 11, utilizes the damping effect of the buffer element 30 to improve the reliability and stability of the sewing machine 200, and has wide application prospect.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
It should be understood by those skilled in the art that the above embodiments are only for illustrating the present invention and are not to be used as a limitation of the present invention, and that suitable changes and modifications of the above embodiments are within the scope of the claimed invention as long as they are within the spirit and scope of the present invention.
Claims (9)
1. A backstitch adjusting mechanism is applied to a sewing machine and is characterized by comprising an electric control assembly and a transmission assembly, wherein the electric control assembly comprises an electric control element and a buffer element, and the buffer element is arranged close to the electric control element and can buffer the vibration of the electric control element during working; the electric control element is connected to a feeding mechanism of the sewing machine through the transmission assembly, and moves under the action of electric power and drives the transmission assembly to adjust the needle pitch of the feeding mechanism; the buffer element is a hydraulic damper;
the electric control element comprises a coil, an adjusting piece and a fixing frame, the coil is connected to an external control center through a cable, the adjusting piece is accommodated in the coil, one end of the adjusting piece is connected with the transmission assembly, and the coil and the adjusting piece are both arranged at one end of the fixing frame;
the buffer element is arranged at the other end of the fixed frame opposite to the adjusting piece, and the adjusting piece extends out of the fixed frame and is connected with the transmission assembly;
the part of the adjusting piece extending out of the fixing frame is provided with a groove, the groove extends along the circumferential direction of the adjusting piece, a fixing ring is clamped in the groove, and the fixing ring is embedded in the groove so as to limit the movement stroke of the adjusting piece;
a metal gasket is arranged between the fixing ring and the fixing frame, and the metal gasket is sleeved on the adjusting piece;
an elastic gasket is arranged between the metal gasket and the fixing frame.
2. The backstitch adjusting mechanism of claim 1 wherein the electrical control member comprises a loop and an adjusting member connected to the driving assembly, the adjusting member being capable of adjusting the gauge of the feed mechanism under the suction of the loop and effecting backstitch of the sewing machine.
3. The backstitch adjusting mechanism of claim 2 wherein the electrical control assembly comprises a mount mounted to the housing of the sewing machine and carrying the electrical control element and the adjusting member.
4. The backstitch adjusting mechanism of claim 3, wherein a portion of the adjusting member extending out of the fixing frame is provided with a groove, a fixing ring is embedded in the groove, and the fixing ring stops and limits a movement stroke of the adjusting member.
5. The backstitch adjustment mechanism of claim 4, wherein the backstitch adjustment mechanism comprises a metal gasket, wherein the metal gasket is sleeved on the adjustment member and is arranged between the adjustment member and the fixing frame.
6. The backstitch adjusting mechanism of claim 5, wherein the backstitch adjusting mechanism comprises an elastic gasket, and the elastic gasket is sleeved on the adjusting piece and is arranged between the metal gasket and the fixing frame.
7. The backstitch adjustment mechanism of claim 1 wherein said electrically controlled element is an electromagnet and said adjustment member is an iron core.
8. The backstitch adjustment mechanism of claim 1 wherein the drive assembly employs at least one of a link drive, a belt drive, and a gear drive.
9. A sewing machine comprising a backstitch adjusting mechanism, characterized in that the backstitch adjusting mechanism is as claimed in any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910340459.9A CN109989184B (en) | 2019-04-25 | 2019-04-25 | Backstitch adjusting mechanism and sewing machine using same |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910340459.9A CN109989184B (en) | 2019-04-25 | 2019-04-25 | Backstitch adjusting mechanism and sewing machine using same |
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| Publication Number | Publication Date |
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| CN109989184A CN109989184A (en) | 2019-07-09 |
| CN109989184B true CN109989184B (en) | 2021-09-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910340459.9A Active CN109989184B (en) | 2019-04-25 | 2019-04-25 | Backstitch adjusting mechanism and sewing machine using same |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111074433B (en) * | 2019-12-30 | 2021-11-02 | 杰克缝纫机股份有限公司 | Feeding mechanism of sewing machine and sewing machine with feeding mechanism |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3949691A (en) * | 1975-04-25 | 1976-04-13 | The Singer Company | Automatic back-tack mechanism |
| US4120254A (en) * | 1977-09-14 | 1978-10-17 | The Singer Company | Direct drive feed system for sewing machines |
| CN103510295B (en) * | 2013-09-28 | 2015-05-27 | 杰克缝纫机股份有限公司 | Sewing machine reverse sewing buffer gear |
| CN206858797U (en) * | 2017-06-26 | 2018-01-09 | 浙江大森缝纫机有限公司 | A kind of sewing machine backstitches mechanism and sewing machine automatically |
| CN207699793U (en) * | 2018-01-05 | 2018-08-07 | 杰克缝纫机股份有限公司 | A kind of gapless drive mechanism of falling feeding automatically |
| CN108611769B (en) * | 2018-06-29 | 2021-04-02 | 杰克缝纫机股份有限公司 | Sewing machine |
| CN109295623B (en) * | 2018-12-04 | 2020-12-25 | 浙江海洋大学 | Sewing machine |
| CN109594208A (en) * | 2019-01-14 | 2019-04-09 | 安徽杰羽制鞋机械科技有限公司 | A kind of needle gage of sewing machine adjusts and falls automatically feeding structure |
| CN109457401B (en) * | 2019-01-15 | 2021-03-09 | 杰克缝纫机股份有限公司 | Sewing machine and reverse feeding adjusting device thereof |
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2019
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