CN109837661B - Sewing machine and thread trimming mechanism thereof - Google Patents
Sewing machine and thread trimming mechanism thereof Download PDFInfo
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- CN109837661B CN109837661B CN201910150531.1A CN201910150531A CN109837661B CN 109837661 B CN109837661 B CN 109837661B CN 201910150531 A CN201910150531 A CN 201910150531A CN 109837661 B CN109837661 B CN 109837661B
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Abstract
The invention discloses a sewing machine of a thread trimming mechanism of a sewing machine, which comprises a right thread trimming driving rod, a left thread trimming connecting assembly and a plurality of electromagnetic limiting assemblies, wherein the two ends of the left thread trimming connecting assembly are respectively hinged with the right thread trimming driving rod and the left thread trimming driving rod, the left thread trimming connecting assembly comprises at least two left thread trimming connecting rods in sliding connection, and the electromagnetic limiting assemblies are arranged at the connecting positions of any two adjacent left thread trimming connecting rods. Closing the electromagnetic limiting assembly to limit the two adjacent left trimming connecting rods to slide, and enabling the right trimming driving rod and the left trimming driving rod to synchronously act to trim double stitches; and starting the electromagnetic limiting assembly to enable the two adjacent left trimming connecting rods to relatively slide, and enabling the right trimming driving rod to independently act relative to the left trimming driving rod to trim a single suture. Because the left trimming drive rod can not act when the right trimming drive rod acts, the left trimming drive rod keeps clamping the trimmed thread to prevent the thread from falling off, and the working reliability is improved to some extent. The invention also discloses a sewing machine comprising the thread trimming mechanism of the sewing machine.
Description
Technical Field
The invention relates to the field of clothing equipment, in particular to a thread cutting mechanism of a sewing machine. The invention also relates to a sewing machine comprising the thread trimming mechanism of the sewing machine.
Background
The existing electromechanical integrated sewing equipment, especially the automatic sewing machine, is increasingly adopted by clothing manufacturers, so that the overall production efficiency and the product quality of the clothing manufacturers are stably improved. The existing automatic sewing machine is generally provided with a thread cutting mechanism to replace manual thread cutting so as to meet the requirement of improving the production efficiency, so that the improvement of the thread cutting mechanism is particularly necessary.
As shown in fig. 1, the conventional thread trimming mechanism includes a right thread trimming portion 01, a left thread trimming portion 02, and a left thread trimming connecting rod 03 having two ends hinged to the right thread trimming portion 01 and the left thread trimming portion 02, wherein the right thread trimming portion 01 includes a right moving blade shaft for driving the right moving blade to move relative to the right stationary blade, and the left thread trimming portion 02 includes a left moving blade shaft for driving the left moving blade to move relative to the left stationary blade, so that both the right thread trimming portion 01 and the left thread trimming portion 02 can be used for trimming a thread, and both the right thread trimming portion 01 and the left thread trimming portion 02 can clamp one end of the cut thread after the thread is trimmed. When the right trimming part 01 acts, the right trimming part 01 drives the left trimming part 02 to act synchronously through the left trimming connecting rod 03, and the right moving knife shaft and the left moving knife shaft act synchronously, so that the right trimming part 01 and the left trimming part 02 are linked, and double stitches are trimmed. However, the conventional thread trimming mechanism cannot make the right thread trimming portion 01 independently operate with respect to the left thread trimming portion 02, and when the right thread trimming portion 01 independently operates, the left thread trimming portion 02 is easily detached from the thread to be caught by the right thread trimming portion 01 in synchronization with the operation, which seriously affects the next smooth sewing of the left thread trimming portion 02. Therefore, the working reliability of the existing thread trimming mechanism is relatively poor.
Disclosure of Invention
In view of this, the present invention provides a thread trimming mechanism for a sewing machine, in which a right moving blade can move relative to a left moving blade, so as to effectively prevent a thread from dropping, and improve the working reliability. Another object of the present invention is to provide a sewing machine including a thread trimming mechanism of the sewing machine, which can improve the working efficiency.
The specific scheme is as follows:
the invention provides a thread trimming mechanism of a sewing machine, comprising:
the right trimming driving rod is used for driving the right moving blade shaft to rotate;
the left trimming driving rod is used for driving the left moving blade shaft to rotate;
the two ends of the left trimming connecting component are respectively hinged with the right trimming driving rod and the left trimming driving rod; the left trimming connecting assembly comprises at least two left trimming connecting rods in sliding connection;
and the plurality of electromagnetic limiting components are arranged at the joint of any two adjacent left trimming connecting rods and used for selectively limiting the sliding of the two adjacent left trimming connecting rods.
Preferably, the electromagnetic limiting assembly comprises:
the electromagnetic driving piece is fixedly arranged on the left trimming connecting rod;
the limiting pin shaft is used for selectively penetrating through the joint of two adjacent left trimming connecting rods;
the protruding portion is hinged to the left trimming connecting rod where the electromagnetic driving piece is located, two ends of the protruding portion are hinged to the electromagnetic driving piece and the limiting pin shaft respectively, and the protruding portion is used for driving the limiting pin shaft to be inserted into or separated from the connecting portion of the two adjacent left trimming connecting rods.
Preferably, the left trimming connecting assembly includes a first left trimming connecting rod for respectively supporting the electromagnetic driving member and a second left trimming connecting rod slidably connected to the first left trimming connecting rod, and the electromagnetic limiting assembly further includes:
the first limiting frame is fixedly arranged on the first left trimming connecting rod and used for enabling the limiting pin shaft to penetrate through the first left trimming connecting rod, and the first limiting frame is provided with an upper limiting guide sleeve used for guiding the limiting pin shaft to move;
and the second limiting frame is fixedly arranged at one end of the first left trimming connecting rod, which is close to the second left trimming connecting rod, and is used for allowing the part of the limiting pin shaft, which penetrates through the upper limiting guide sleeve, to penetrate through, and is provided with a lower limiting guide sleeve which is communicated with the upper limiting guide sleeve to guide the limiting pin shaft to continue to move.
Preferably, the periphery of the limit pin shaft is fixedly sleeved with an elastic sleeve which is abutted against the upper limit guide sleeve and used for eliminating noise.
Preferably, the method further comprises the following steps:
a sliding connecting rod for adjusting the separation of the double needles;
the position detection device is arranged on the sliding connecting rod and is used for detecting the position of the sliding connecting rod;
and the control device is respectively connected with the position detection device and the electromagnetic driving part and is used for controlling the electromagnetic driving part to drive the limiting pin shaft to act according to a signal sent by the position detection device.
Preferably, the method further comprises the following steps:
a supporting seat;
the first end of the main driving rod is hinged to the supporting seat, the second end of the main driving rod is installed on a main driving rod of a main driving cam, and the second end of the main driving rod is provided with a driving roller which is matched with a cam groove of the main driving cam to drive the main driving rod to act;
first end through right drive pivot with the second end of master drive pole is articulated mutually and the second end with the right side trimming actuating lever is kept away from left side trimming coupling assembling one end is articulated mutually, is used for driving right side trimming actuating lever pivoted right side trimming connecting rod.
Preferably, the method further comprises the following steps:
the first end is installed in the right driving rotating shaft, the second end is installed on a right supporting column arranged on the supporting seat, and a right reset elastic piece is used for assisting the main driving rod to automatically reset after the main driving rod acts.
Preferably, the method further comprises the following steps:
the left shuttle frame is used for the left moving knife shaft to pass through;
the first end of the left trimming driving rod is mounted on the left support column, the second end of the left trimming driving rod is mounted on the left support column arranged on the left shuttle frame, and the left limiting elastic piece is used for limiting the rotation of the left trimming driving rod when any two adjacent left trimming connecting rods slide relatively.
Preferably, the method further comprises the following steps:
the right shuttle frame is used for the right moving blade shaft to pass through;
the right stopping column is fixedly arranged on the right shuttle frame and used for limiting the rotation of the right trimming driving rod;
and the left stop column is fixedly arranged on the left shuttle frame and used for limiting the rotation of the left trimming drive rod.
The invention also provides a sewing machine, a sewing machine body and the sewing machine thread trimming mechanism arranged on the sewing machine body.
Compared with the background art, the sewing machine of the thread trimming mechanism of the sewing machine comprises a right thread trimming driving rod for driving a right moving blade to rotate, a left thread trimming driving rod for driving a left moving blade to rotate, and a left thread trimming connecting assembly, wherein two ends of the left thread trimming connecting assembly are respectively hinged with the right thread trimming driving rod and the left thread trimming driving rod, the left thread trimming connecting assembly comprises at least two left thread trimming connecting rods in sliding connection, and the sewing machine further comprises a plurality of electromagnetic limiting assemblies, the electromagnetic limiting assemblies are arranged at the connecting positions of any two adjacent left thread trimming connecting rods, and are used for selectively limiting the two adjacent left thread trimming connecting rods to slide.
When the electromagnetic limiting assembly is closed, the electromagnetic limiting assembly limits two adjacent left trimming connecting rods to slide, the two adjacent left trimming connecting rods are fixed relatively, and the left trimming connecting assembly is equivalent to a connecting rod; when the right trimming driving rod acts, the right trimming driving rod drives the left trimming driving rod to act synchronously through the left trimming connecting component, so that the right moving blade shaft and the left moving blade shaft rotate synchronously to cut double stitches;
when the electromagnetic limiting assembly is started, the electromagnetic limiting assembly cannot limit the sliding of two adjacent left trimming connecting rods, the two adjacent left trimming connecting rods can realize relative sliding, and the left trimming connecting assembly is equivalent to a telescopic rod; when the right trimming driving rod acts, the right trimming driving rod acts independently relative to the left trimming driving rod through the left trimming connecting assembly, so that the right trimming driving rod and the left trimming driving rod are effectively prevented from acting synchronously, the right moving cutter shaft can rotate independently relative to the left moving cutter shaft, and single suture is cut. Further, when the right trimming drive rod acts, the left trimming drive rod may not act, and the left trimming drive rod keeps clamping the trimmed thread because of not acting synchronously with the right trimming drive rod, thereby effectively preventing the thread from falling off.
Therefore, the thread cutting mechanism of the sewing machine provided by the invention has improved working reliability.
According to the sewing machine comprising the sewing machine thread cutting mechanism, due to the improvement of the working reliability of the sewing machine thread cutting mechanism, the failure rate of the sewing machine thread cutting mechanism is reduced, the invalid working time is shortened, and therefore the working efficiency is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a structural view of a thread trimming mechanism of a conventional sewing machine;
FIG. 2 is a structural view of a thread trimming mechanism of a sewing machine according to an embodiment of the present invention;
FIG. 3 is a top view of FIG. 2;
FIG. 4 is a front assembly view of other components mounted on the support base;
FIG. 5 is an exploded view of the side of the support bracket of FIG. 4 adjacent the left shear connection assembly;
FIG. 6 is a rear view of the structure of FIG. 4;
FIG. 7 is an assembled structure view of the left trimming connecting assembly and the electromagnetic spacing assembly;
FIG. 8 is an assembly structure view of a second left trimming connecting rod, a second limiting frame, a limiting pin shaft and a V-shaped rotating frame;
FIG. 9 is another assembled structural view of the left shear connection assembly and the electromagnetic stop assembly;
FIG. 10 is a view showing the structure of a second stopper frame;
FIG. 11 is a block diagram of a right trimming assembly;
FIG. 12 is a state view of the right-hand blade hooking;
FIG. 13 is a view showing a state of cutting the right blade;
FIG. 14 is a front view of the needle bar adjustment assembly;
FIG. 15 is a rear view of the structure of FIG. 14;
FIG. 16 is a view showing an installation structure of the position detecting device;
fig. 17 is an exploded view of fig. 16.
The reference numbers are as follows:
the left trimming part 02 and the right trimming connecting rod 03 are arranged on the left side of the left trimming part 01;
the device comprises a right moving knife shaft 1, a left moving knife shaft 2, a right trimming drive rod 3, a left trimming drive rod 4, a left trimming connecting assembly 5, an electromagnetic limiting assembly 6, a left shuttle frame 7, a needle rod adjusting assembly 8, a supporting seat 9, a main drive rod 10, a right trimming connecting rod 11, a main drive cam 12, a main connecting plate 13, a right reset elastic part 14, a left limiting elastic part 15, a right shuttle frame 16, a right stopping column 17, a left stopping column 18, a right trimming assembly 19, a left trimming assembly 20 and a position detection device 21;
a hall sensor 211, a fixed retainer 212 and magnetic steel 213;
a first left trimming link 51 and a second left trimming link 52;
the device comprises an electromagnetic driving piece 61, a limiting pin shaft 62, a V-shaped rotating frame 63, a first limiting frame 64, a second limiting frame 65 and an elastic sleeve 66;
an electromagnetic coil 611 and an electromagnetic core 612;
an upper limit guide sleeve 641;
a lower limit guide sleeve 651;
a rotary shift lever 81, a rotary link 82, a slide link 83, and a needle bar separating plate 84;
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In order that those skilled in the art will better understand the disclosure, the invention will be described in further detail with reference to the accompanying drawings and specific examples.
Referring to fig. 2 to 17, fig. 2 is a structural diagram of a thread trimming mechanism of a sewing machine according to an embodiment of the present invention; FIG. 3 is a top view of FIG. 2; FIG. 4 is a front assembly view of other components mounted on the support base; FIG. 5 is an exploded view of the side of the support bracket of FIG. 4 adjacent the left shear connection assembly; FIG. 6 is a rear view of the structure of FIG. 4; FIG. 7 is an assembled structure view of the left trimming connecting assembly and the electromagnetic spacing assembly; FIG. 8 is an assembly structure view of a second left trimming connecting rod, a second limiting frame, a limiting pin shaft and a V-shaped rotating frame; FIG. 9 is another assembled structural view of the left shear connection assembly and the electromagnetic stop assembly; FIG. 10 is a view showing the structure of a second stopper frame; FIG. 11 is a block diagram of a right trimming assembly; FIG. 12 is a state view of the right-hand blade hooking; FIG. 13 is a view showing a state of cutting the right blade; FIG. 14 is a front view of the needle bar adjustment assembly; FIG. 15 is a rear view of the structure of FIG. 14; FIG. 16 is a view showing an installation structure of the position detecting device; fig. 17 is an exploded view of fig. 16.
The embodiment of the invention discloses a thread trimming mechanism of a sewing machine, which comprises a right moving blade shaft 1, a left moving blade shaft 2, a right thread trimming driving rod 3, a left thread trimming driving rod 4, a left thread trimming connecting assembly 5 and an electromagnetic limiting assembly 6.
The right trimming driving rod 3 is fixedly sleeved on the periphery of the right moving blade shaft 1, so that the right trimming driving rod 3 drives the right moving blade shaft 1 to rotate. In this particular embodiment, the right-hand blade spindle 1 is preferably circular in cross-section. The structure of right trimming actuating lever 3 is the V type, and its transitional coupling department is equipped with the convex installation cover that has the breach, and the both ends of this breach link firmly as an organic whole through holding screw detachably to convex installation cover is adapted to the right side that the installation external diameter changed in certain extent and moves sword axle 1, is favorable to promoting the adaptability.
Similarly, the left thread trimming driving rod 4 is fixedly sleeved on the periphery of the left moving blade shaft 2, so that the left thread trimming driving rod 4 drives the left moving blade shaft 2 to rotate. In this embodiment, the left trimming driving rod 4 is disk-shaped and has three connecting claws uniformly distributed, the first connecting claw is hinged to the left trimming connecting assembly 5, the second connecting claw is fixedly provided with an arc-shaped mounting sleeve having a notch and used for mounting the left moving blade shaft 2, and the fixing mode of the left moving blade shaft 2 is the same as that of the right moving blade shaft 1, which refers to the above contents.
The two ends of the left trimming connecting assembly 5 are respectively hinged with the right trimming driving rod 3 and the left trimming driving rod 4, and the left trimming connecting assembly 5 comprises at least two left trimming connecting rods in sliding connection. Preferably, in this particular embodiment, the left shear connection assembly 5 includes a first left shear link 51 and a second left shear link 52 that are slidably connected. Specifically, one end of the second left trimming connecting rod 52 close to the first left trimming connecting rod 51 is provided with a guide sliding groove for the first left trimming connecting rod 51 to slide, and correspondingly, one end of the first left trimming connecting rod 51 close to the second left trimming connecting rod 52 is provided with a guide sliding block capable of sliding along the guide sliding groove. To prevent the second left thread trimming link 52 from being separated from the first left thread trimming link 51, a guide fence is detachably fixed to the groove edge of the guide chute by a set screw, so that the guide slider is sandwiched between the guide chute and the guide fence. In order to further prevent the second left trimming connecting rod 52 from being separated from the first left trimming connecting rod 51, a stop block which is abutted against the groove edge of the guide sliding groove can be arranged at one end of the guide sliding block which is far away from the first left trimming connecting rod 51, and when the guide sliding block slides to the limit position, the stop block is abutted against the groove edge of the guide sliding groove, so that the guide sliding block is effectively prevented from being separated from the guide sliding groove. Of course, the number of the left trimming links included in the left trimming connecting assembly 5 is not limited to two, and the sliding manner of connecting the two left trimming links is not limited thereto.
The electromagnetic limiting component 6 comprises a plurality of electromagnetic limiting components, and each electromagnetic limiting component 6 is arranged at the joint of any two adjacent left trimming connecting rods, so that the electromagnetic limiting component 6 can selectively limit the sliding of the two adjacent left trimming connecting rods.
When the electromagnetic limiting assembly 6 is closed, the electromagnetic limiting assembly 6 limits the two adjacent left trimming connecting rods to slide, the two adjacent left trimming connecting rods are fixed relatively, and the left trimming connecting assembly 5 is equivalent to a connecting rod; when the right trimming driving rod 3 acts, the right trimming driving rod 3 drives the left trimming driving rod 4 to act synchronously through the left trimming connecting component 5, so that the right moving knife shaft 1 and the left moving knife shaft 2 rotate synchronously to cut double stitches;
when the electromagnetic limiting assembly 6 is started, the electromagnetic limiting assembly 6 cannot limit the two adjacent left trimming connecting rods to slide, the two adjacent left trimming connecting rods can realize relative sliding, and the left trimming connecting assembly 5 is equivalent to a telescopic rod; when the right trimming drive rod 3 acts, the right trimming drive rod 3 acts independently relative to the left trimming drive rod 4 through the left trimming connecting assembly 5, and the synchronous action of the right trimming drive rod 3 and the left trimming drive rod 4 is effectively avoided, so that the right moving knife shaft 1 can rotate independently relative to the left moving knife shaft 2, and the cutting of a single suture is realized.
In summary, when the right trimming driving rod 3 acts, the left trimming driving rod 4 may not act, and the left trimming driving rod 4 keeps clamping the trimmed thread because it does not act synchronously with the right trimming driving rod 3, thereby effectively preventing the thread from falling off. Therefore, the thread cutting mechanism of the sewing machine provided by the invention has improved working reliability.
In this particular embodiment, the electromagnetic limit component 6 preferably comprises an electromagnetic driving member 61, a limit pin 62 and a V-shaped rotating frame 63.
The electromagnetic driving member 61 is fixed on one of the left trimming links, in this embodiment, the electromagnetic driving member 61 is preferably fixed on the first left trimming link 51, and the electromagnetic driving member 61 includes an electromagnetic coil 611 and an electromagnetic core 612, wherein the electromagnetic coil 611 is in a rectangular ring shape, and the electromagnetic core 612 is disposed through the electromagnetic coil 611. When the electromagnetic coil 611 is energized, the electromagnetic core 612 moves relative to the electromagnetic coil 611; when the electromagnetic coil 611 is de-energized, the electromagnet core 612 is fixed relative to the electromagnetic coil 611. The side surface of the electromagnetic coil 611 is detachably attached to the first left shear link 51 via an L-shaped coil fixing plate. The L-shaped coil fixing plate is preferably fixed using a set screw, but is not limited thereto. Further, the electromagnetic driving element 61 further includes a return spring sleeved on the periphery of the electromagnetic core 612 and having one end abutting against the electromagnetic coil 611, and correspondingly, the outer periphery of the electromagnetic core 612 is fixedly sleeved with an abutting snap spring abutting against the end of the return spring far away from the electromagnetic coil 611, so that after the electromagnetic coil 611 loses power, the moved electromagnetic core 612 can be automatically restored to the initial position through the return spring, and convenience is improved.
The limit pin shaft 62 can selectively penetrate through the joint of two adjacent left trimming connecting rods. The limit pin shaft 62 is preferably a cylindrical pin shaft, and correspondingly, a through limit through hole is formed at the joint of two adjacent left trimming connecting rods. When the limiting pin shaft 62 sequentially penetrates through the limiting through holes of the two adjacent left trimming connecting rods, the limiting pin shaft 62 limits the two adjacent left trimming connecting rods to slide, and the two adjacent left trimming connecting rods are relatively fixed; on the contrary, two adjacent left trimming connecting rods can slide relatively.
The protruding portion of the V-shaped rotating frame 63 is hinged to the left trimming connecting rod where the electromagnetic driving member 61 is located, two ends of the V-shaped rotating frame 63 are hinged to the electromagnetic driving member 61 and the limiting pin 62, respectively, and when the electromagnetic core 612 moves relative to the electromagnetic coil 611, the electromagnetic core 612 drives the V-shaped rotating frame 63 to move, so that the V-shaped rotating frame 63 drives the limiting pin 62 to be inserted into or pulled out of the connection position of two adjacent left trimming connecting rods.
In this embodiment, the V-shaped rotating frame 63 specifically includes a first connecting arm rotatably connected to the electromagnet core 612 and a second connecting arm rotatably connected to the limit pin 62, an included angle between the first connecting arm and the second connecting arm is an acute angle, and a joint of the first connecting arm and the second connecting arm forms a protruding portion. Correspondingly, the end of the electromagnet core 612 close to the first connecting arm is arranged in the hinge mounting groove, the first connecting arm is provided with a waist-shaped hinge hole, and the pin shaft penetrating through the hinge mounting groove correspondingly penetrates through the waist-shaped hinge hole, so that the electromagnet core 612 and the first connecting arm are rotatably connected. Similarly, the hinge connection between the limit pin 62 and the second connecting arm is the same as the connection between the electromagnet core 612 and the first connecting arm, and is not described herein again. It should be noted that the waist-shaped hinge holes on the first connecting arm and the second connecting arm respectively extend along the length direction of the first connecting arm and the second connecting arm, so as to prevent the V-shaped rotating frame 63 from being locked during the rotating rotation, and to effectively ensure the smooth movement of the V-shaped rotating frame 63. Of course, the structure of the V-shaped turret 63 is not limited thereto.
In this embodiment, the electromagnetic limiting component 6 further includes a first limiting frame 64 and a second limiting frame 65, wherein the first limiting frame 64 is fixedly disposed on the first left trimming connecting rod 51, so that the limiting pin 62 can pass through the first left trimming connecting rod 51, and accordingly, the first limiting frame 64 has an upper limiting guide sleeve 641 for guiding the limiting pin 62 to move. In this embodiment, the first limiting frame 64 is fixed to the first left trimming connecting rod 51 by a set screw, and the upper limiting guide 641 is fixedly disposed on a side of the first limiting frame 64 away from the first left trimming connecting rod 51. Preferably, the protruding part of the V-shaped rotating frame 63 is hinged to the first position-limiting frame 64 through a pin. Of course, the structure of the first stopper 64 is not limited thereto.
The second limiting bracket 65 is fixedly disposed at one end of the second left trimming connecting rod 52 close to the first left trimming connecting rod 51, and is used for allowing the portion of the limiting pin 62 passing through the upper limiting guide sleeve 641 to pass through. The second position-limiting bracket 65 has a lower position-limiting guide sleeve 651 which is connected to the upper position-limiting guide sleeve 641 to guide the position-limiting pin 62 to move continuously. The limiting pin shaft 62 is guided by the upper limiting guide sleeve 641 and the lower limiting guide sleeve 651 to move, so that the phenomenon that the limiting pin shaft 62 is inclined or deviated in the moving process is prevented, the limiting pin shaft 62 is prevented from being stuck in the first limiting frame 64 or the second limiting frame 65, smooth movement of the limiting pin shaft 62 is further guaranteed, and the work reliability is further improved.
In this embodiment, the second position-limiting frame 65 is detachably fixed to the first left trimming link 51 by a set screw, and the lower position-limiting guide sleeve 651 is fixedly disposed on a side of the second position-limiting frame 65 close to the first left trimming link 51. In addition, two waist-shaped adjusting holes which extend along the length direction and are used for a set screw to pass through are formed in two sides of the second limiting frame 65, and the waist-shaped adjusting holes can meet the requirement of needle position adjustment of the double-needle machine, so that the limiting pin shaft 62 can be matched with the lower limiting guide sleeve 651 after the first left trimming connecting rod 51 and the second left trimming connecting rod 52 move relatively; furthermore, the waist-shaped adjusting hole can adjust the mounting position of the second limiting frame 65 by adjusting the fixing position of the set screw in the waist-shaped adjusting hole, so as to adjust the coaxiality of the lower limiting guide sleeve 651 and the upper limiting guide sleeve 641, thereby compensating the processing or manufacturing errors of the first limiting frame 64 and the second limiting frame 65, and naturally increasing the adaptability.
The periphery of the limit pin 62 is fixedly sleeved with the elastic sleeve 66, and the periphery of the elastic sleeve 66 can abut against the upper limit guide sleeve 641, so that when the limit pin 62 moves, the elastic sleeve 66 prevents the limit pin 62 from deviating on the one hand, and on the other hand, can eliminate noise generated by collision between the limit pin 62 and the upper limit guide sleeve 641. The elastic sleeve 66 may be a rubber sleeve or a nylon sleeve, and the material thereof is not particularly limited.
It should be noted that, as shown in fig. 9, the limiting pin 62 may also pass through the second left trimming link 52 after passing through the first left trimming link 51, which does not affect the purpose of implementing the present invention.
In order to realize the switching between the double-needle-rod mode and the single-needle-rod mode, the invention further comprises a needle rod adjusting assembly 8, wherein the needle rod adjusting assembly comprises a rotating shift rod 81, a rotating connecting rod 82, a sliding connecting rod 83 and a needle rod separating plate 84, the rotating shift rod 81 is arranged on the outer side of the machine shell, the rotating connecting rod 82 is arranged on the inner side of the machine shell, and the rotating shift rod 81 is fixedly connected with the rotating connecting rod 82 so that the rotating connecting rod 82 and the rotating shift rod 81 can rotate synchronously. One end of the sliding connecting rod 83 is rotatably connected with the rotating connecting rod 82, and the other end is fixedly connected with the needle bar separating plate 84. The needle bar separating plate 84 enables the double needle bar separation. When the rotating shift lever 81 is shifted, the rotating shift lever 81 drives the rotating connecting rod 82 to rotate, the rotating connecting rod 82 pulls the sliding connecting rod 83 to move, and the sliding connecting rod 83 drives the needle bar separating plate 84 to move, so that the needle bar separating plate 84 separates the left needle bar and the right needle bar.
It should be noted that when the double needle bar sewing machine is to perform corner sewing, the needle bar adjusting assembly 8 must be activated to change the double needle bar mode to the single needle bar mode to ensure the beautiful appearance of the sewing thread.
Correspondingly, the invention also comprises a position detection device 21 and a control device. The position detection device 21 is provided on the slide link 83, and detects the position of the slide link 83. In this embodiment, the position detecting device 21 includes a hall sensor 211 fixed on the supporting seat 9 by an L-shaped fixing plate, a fixing collar 212 fixedly sleeved on the outer periphery of the sliding link 83, and a magnetic steel 213 mounted on the fixing collar 212 and cooperating with the hall sensor 211 to realize signal transmission. Of course, the type of the position detection device 21 is not limited thereto, and the use of other types of position sensors does not affect the achievement of the object of the present invention.
The control device is respectively connected with the position detection device 21 and the electromagnetic driving part 61, so that the control device controls the electromagnetic driving part 61 to drive the limit pin 62 to act according to the signal sent by the position detection device 21.
In this embodiment, when the dual needle bar mode is changed to the single needle bar mode, the rotating lever 81 is toggled forward, that is, the rotating lever 81 is toggled leftward, the rotating lever 81 drives the sliding link 83 to move forward through the rotating link 82, the sliding link 83 drives the magnetic steel 213 to move to the target position, at this time, the hall sensor 211 senses the magnetic steel 213, the hall sensor 211 sends a signal to the control device, the sewing machine pedal is stepped backward to feed back the trimming signal to the control device, the control device controls the electromagnetic coil 611 of the electromagnetic driving member 61 to be powered, the electromagnetic core 612 pulls the V-shaped rotating frame 63, so that the V-shaped rotating frame 63 drives the limiting pin 62 to disengage from the upper limiting guide sleeve 641 and the lower limiting guide sleeve 651, so that the first left trimming link 51 and the second left trimming link 52 can slide relative to each other, so that the right trimming driving rod 3 rotates independently relative to the left trimming driving rod 4, realize cutting off a single suture.
When the single needle bar mode is changed into the double needle bar mode, the rotating shift lever 81 is shifted reversely, the rotating shift lever 81 drives the sliding connecting rod 83 to move reversely through the rotating connecting rod 82, the sliding connecting rod 83 drives the magnetic steel 213 to move to the initial position, at the moment, the hall sensor 211 senses the magnetic steel 213 again, the hall sensor 211 sends a signal to the control device, the control device receiving the trimming signal controls the electromagnetic coil 611 of the electromagnetic driving piece 61 to lose power, the electromagnetic core 612 pushes the V-shaped rotating frame 63, the V-shaped rotating frame 63 drives the limit pin shaft 62 to be inserted into the upper limit guide sleeve 641 and the lower limit guide sleeve 651, the first left trimming connecting rod 51 and the second left trimming connecting rod 52 are fixedly connected into a whole, the right trimming driving rod 3 and the left trimming driving rod 4 rotate synchronously, the right moving shaft 1 and the left moving shaft 2 further realize synchronous rotation, and double-stitch cutting is realized.
Therefore, the position detection device 21 and the control device can realize automatic switching of the thread cutting mode, the automation degree and the sewing precision are improved, and the sewing efficiency and the sewing quality are naturally improved.
In order to realize the function of trimming, the invention also comprises a supporting seat 9, a main driving rod 10 and a right trimming connecting rod 11. The supporting seat 9 is used for supporting other parts, and it should be noted here that the left moving blade shaft 2 and the right moving blade shaft 1 both penetrate through the supporting seat 9, one end of the left moving blade shaft is connected with the left trimming connecting assembly 5 on the first side of the supporting seat 9, and the other end of the left moving blade shaft is connected with the corresponding moving blade on the second side of the supporting seat 9, so that the supporting seat 9 is reasonably utilized, and the occupied space is reduced.
The main driving rod 10 is hinged at a first end to the support 9 and at a second end to a main driving cam 12. Specifically, a main connecting plate 13 is detachably mounted on the supporting seat 9, one end of the main connecting plate 13 is fixed on the supporting seat 9 through a screw, and the other end of the main connecting plate 13 is rotatably connected with the first end of the main driving rod 10 through a rotating shaft. The second end of the main driving rod 10 has a driving roller, and accordingly, the present invention further includes a main driving cam 12 having a central axis intersecting the main driving rod 10 and capable of rotating, and the main driving cam 12 is preferably a cylindrical cam provided with a cam groove cooperating with the driving roller. When the main drive cam 12 is rotated in the forward and reverse directions, the cam groove causes the drive roller to move to the right or left, respectively, based on the current view of fig. 3.
The first end of the right trimming connecting rod 11 is hinged to the second end of the main driving rod 10 through a right driving rotating shaft, and the second end of the right trimming connecting rod 11 is hinged to one end, far away from the left trimming connecting assembly 5, of the right trimming driving rod 3, so that the right trimming connecting rod 11 drives the right trimming driving rod 3 to rotate. In this embodiment, the right trimming link 11 and the right trimming driving rod 3 are also rotatably connected through a rotating shaft. It should be noted that the top end of the rotating shaft serving as the rotating connection is provided with a stop flange to prevent the two rotating connections from being disconnected and ensure that the two rotating connections reliably rotate.
Preferably, in this embodiment, the right trimming link 11 includes a first connecting sleeve and a second connecting sleeve rotatably connected to the main driving rod 10 and the right trimming driving rod 3, respectively, and an intermediate connecting rod detachably connected between the first connecting sleeve and the second connecting sleeve by a threaded connection, so as to adjust the length of the right trimming link 11 within a certain range, compensate for assembly errors or machining errors between related components, and facilitate improvement of adaptability. Of course, the structure of the right shear link 11 is not limited thereto.
The present invention further includes a drive motor for driving the rotation of the main drive cam 12, thereby providing power for the rotation of the right trimming drive lever 3.
The invention also comprises a right reset elastic piece 14, wherein the first end of the right reset elastic piece 14 is arranged on the right driving rotating shaft, the second end of the right reset elastic piece 14 is arranged on a right supporting column arranged on the supporting seat 9, after the main driving rod 10 rotates to a target position under the action of the driving roller, and after the main driving cam 12 stops rotating, the main driving rod 10 automatically restores to an initial position along the cam groove under the action of the right reset elastic piece 14. Preferably, the right restoring elastic member 14 is a general cylindrical elastic member having hooks at both ends, but the type is not limited thereto.
The invention also comprises a left limiting elastic part 15, wherein the first end of the left limiting elastic part 15 is arranged on the left trimming drive rod 4, and the second end of the left limiting elastic part 15 is arranged on a left supporting column arranged on the left shuttle frame 7, so that the left limiting elastic part 15 can limit the rotation of the left trimming drive rod 4 when any two adjacent left trimming connecting rods slide relatively. In this embodiment, the left stopper elastic member 15 is preferably a general cylindrical spring having hooks at both ends, but the type is not limited thereto. Specifically, the first end of the left limit elastic member 15 is connected to the third connecting claw of the left trimming drive rod 4. It should be noted that the elastic force of the left limiting elastic member 15 needs to be greater than the frictional resistance between any two adjacent left trimming connecting rods, so as to ensure that the left limiting elastic member 15 does not rotate when any two adjacent left trimming connecting rods slide relatively.
In order to further improve the reliability, the invention also comprises a right shuttle frame 16, a right stopping post 17 and a left stopping post 18, wherein the right shuttle frame 16 is arranged opposite to the left shuttle frame 7. The right stop column 17 is fixedly arranged on the right shuttle frame 16. When the right trimming drive rod 3 rotates to a certain angle, the right trimming drive rod 3 collides with the right stopping post 17 to prevent the right trimming drive rod 3 from continuously rotating due to factors such as inertia force and the like, so that the rotating included angle between the right trimming drive rod 3 and the left trimming drive rod 4 is ensured, and the left trimming connecting assembly 5 can reliably drive the left trimming drive rod 4 to rotate. The left stop column 18 is fixedly arranged on the left shuttle frame 7, so that the left stop column 18 limits the transitional rotation of the left trimming drive rod 4. The right and left stop posts 17 and 18 are preferably, but not limited to, attachment bolts.
The invention also comprises a right trimming component 19 and a left trimming component 20 which are correspondingly connected with the right movable knife shaft 1 and the left movable knife shaft 2 respectively, wherein the right trimming component 19 comprises a right movable knife 191, a right fixed knife 192, a right driving guide frame 193 and a right movable knife driving slide block 194.
The right stationary blade 192 is detachably fixed to the right shuttle frame 16 by a set screw. The right driving guide frame 193 is fixedly installed on the right shuttle frame 16 and has a right driving guide groove for receiving the right blade driving slider 194. One end of the right moving blade shaft 1 penetrates through the right shuttle frame 16, a right driving roller for driving the right moving blade driving slider 194 to move is arranged at one end of the right moving blade shaft 1 close to the right shuttle frame 16, and correspondingly, the right moving blade driving slider 194 is provided with a right driving installation groove for accommodating the right driving roller. When the right knife shaft 1 rotates under the driving of the right trimming driving rod 3, the right driving roller pushes the right knife driving slider 194 to move along the right driving guide slot, and the right knife driving slider 194 drives the right knife 191 to move relative to the right stationary knife 192. The right elastic support 195 is fixed on the right shuttle frame 16, and the right elastic support 195 abuts against the bottom of the right moving blade 191, so that the right moving blade 191 can always keep a contact state with the right fixed blade 192. In this embodiment, the right elastic support member 195 is preferably two elastic metal sheets having one end fixed to the right shuttle frame 16, but the structure of the right elastic support member 195 is not limited thereto.
For the sake of improving the versatility, the structure of the right thread trimming assembly 19 is the same as that of the left thread trimming assembly 20, and will not be described herein again.
The thread cutting mechanism of the sewing machine provided by the invention has the following working principle:
the double-needle-bar mode is changed into the single-needle-bar mode, the rotating shifting rod 81 is shifted forward, namely the rotating shifting rod 81 is shifted leftward, the rotating shifting rod 81 drives the sliding connecting rod 83 to move forward through the rotating connecting rod 82, the sliding connecting rod 83 drives the magnetic steel 213 to move to a target position, at the moment, the hall sensor 211 senses the magnetic steel 213, the hall sensor 211 sends a signal to the control device, a sewing machine pedal is stepped on backwards to feed back a trimming signal to the control device, the control device controls the electromagnetic coil 611 of the electromagnetic driving piece 61 to be electrified, the electromagnetic core 612 pulls the V-shaped rotating frame 63, the V-shaped rotating frame 63 drives the limiting pin shaft 62 to be pulled out from the upper limiting guide sleeve 641 and the lower limiting guide sleeve 651, and the first left trimming connecting rod 51 and the second left trimming;
the main driving cam 12 rotates forwards, the main driving cam 12 drives the main driving rod 10 to move right, the right trimming connecting rod 11 drives the right trimming driving rod 3 to drive the right movable cutter shaft 1 to rotate anticlockwise, the right movable cutter shaft 1 drives the right movable cutter 191 to advance relative to the right fixed cutter 192 through the right cutter driving slide block 194, and the right movable cutter 191 is used for taking out a cutter hook line; meanwhile, the right trimming drive rod 3 drives the first left trimming link 51 to slide relative to the second left trimming link 52, and the left trimming drive rod 4 does not act;
the main driving cam 12 stops rotating, the cam groove drives the main driving rod 10 to move leftwards, meanwhile, the right reset elastic piece 14 assists the main driving rod 10 to move leftwards, the main driving rod 10 pulls the right trimming connecting rod 11 to move leftwards, the right trimming driving rod 3 drives the right movable cutter shaft 1 to rotate clockwise, the right movable cutter shaft 1 drives the right movable cutter 191 to retreat relative to the right fixed cutter 192 through the right cutter driving sliding block 194, the right movable cutter 191 is meshed with the right fixed cutter 192 in the retreating process, threads hooked by the right movable cutter 191 are cut off, and therefore single threads are cut off.
The mode of the single needle bar is changed into the mode of the double needle bars, the rotating shifting lever 81 is shifted reversely, the rotating shifting lever 81 drives the sliding connecting rod 83 to move reversely through the rotating connecting rod 82, the sliding connecting rod 83 drives the magnetic steel 213 to move to the initial position, the hall sensor 211 senses the magnetic steel 213, the hall sensor 211 sends a signal to the control device, the control device receiving the trimming signal controls the electromagnetic coil 611 of the electromagnetic driving piece 61 to lose power, the electromagnetic iron core 612 drives the V-shaped rotating frame 63, the V-shaped rotating frame 63 drives the limiting pin shaft 62 to be inserted into the upper limiting guide sleeve 641 and the lower limiting guide sleeve 651, and the first left trimming connecting rod 51 and the second left trimming connecting rod 52 are fixedly connected into a whole so that the right trimming driving rod 3 and the left trimming driving rod 4;
the main driving cam 12 rotates positively, and the cam groove drives the main driving rod 10 to move rightwards; the main driving rod 10 pushes the right trimming connecting rod 11 to move rightwards, the right trimming connecting rod 11 drives the right trimming driving rod 3 to rotate anticlockwise, the right moving blade shaft 1 rotates anticlockwise, the right driving roller drives the right moving blade driving slider 194 to advance along the right driving guide groove of the right driving guide frame 193, the right moving blade driving slider 194 drives the right moving blade 191 to advance relative to the right fixed blade 192, the right moving blade 191 moves towards the direction close to the right rotating shuttle, and the right moving blade 191 goes out of the cutter hook line; meanwhile, the right trimming driving rod 3 drives the left trimming driving rod 4 to rotate through the left trimming connecting assembly 5, the left moving blade shaft 2 rotates anticlockwise, the left moving blade shaft 2 drives the left moving blade to synchronously advance relative to the left fixed blade, and the left moving blade discharges a blade and hooks a wire;
the main driving cam 12 stops rotating, the cam groove drives the main driving rod 10 to move leftwards, meanwhile, the right reset elastic part 14 assists the main driving rod 10 to reset, the main driving rod 10 pulls the right trimming connecting rod 11 to move leftwards, the right trimming connecting rod 11 drives the right trimming driving rod 3 to rotate clockwise, the right trimming driving rod 3 drives the right movable cutter shaft 1 to rotate clockwise, the right driving roller drives the right cutter driving slider 194 to retreat along the right driving guide groove of the right driving guide frame 193, the right cutter driving slider 194 drives the right cutter 191 to retreat relative to the right fixed cutter 192, the right cutter 191 moves towards the direction far away from the right rotary shuttle, and the right cutter 191 is meshed with the right fixed cutter 192 in the retreating process, so that a thread hooked by the right cutter 191 is cut; meanwhile, the right trimming driving rod 3 drives the left trimming connecting assembly 5 to move, the left trimming connecting assembly 5 drives the left trimming driving rod 4 to rotate clockwise, the left trimming driving rod 4 drives the left moving cutter shaft 2 to rotate clockwise, the left moving cutter shaft 2 drives the left moving cutter to retreat relative to the left fixed cutter, and the left moving cutter is meshed with the left fixed cutter in the retreating process, so that the seam line hooked by the left moving cutter is cut, and double seams are cut.
The invention also provides a sewing machine, which comprises a sewing machine body and the sewing machine thread trimming mechanism, and the work reliability of the sewing machine thread trimming mechanism is improved, so that the fault rate of the sewing machine thread trimming mechanism is reduced, the invalid work time is favorably shortened, and the work efficiency is improved.
The sewing machine and the thread trimming mechanism thereof provided by the invention are described in detail, the principle and the implementation mode of the invention are explained by applying specific examples, and the description of the examples is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (10)
1. A thread trimming mechanism of a sewing machine, comprising:
a right trimming drive rod (3) for driving the right moving blade shaft (1) to rotate;
a left trimming drive rod (4) for driving the left moving blade shaft (2) to rotate;
a left trimming connecting component (5) with two ends respectively hinged with the right trimming driving rod (3) and the left trimming driving rod (4); the left trimming connecting assembly (5) comprises at least two left trimming connecting rods in sliding connection;
and the plurality of electromagnetic limiting components (6) are arranged at the joints of any two adjacent left trimming connecting rods and are used for selectively limiting the sliding of the two adjacent left trimming connecting rods.
2. The thread trimming mechanism of a sewing machine according to claim 1, characterized in that said electromagnetic stop assembly (6) comprises:
an electromagnetic driving part (61) fixedly arranged on the left trimming connecting rod;
the limiting pin shaft (62) is used for selectively penetrating through the joint of two adjacent left trimming connecting rods;
the left trimming connecting rod at the position of the electromagnetic driving part (61) is hinged to the protruding part, two ends of the left trimming connecting rod are hinged to the electromagnetic driving part (61) and the limiting pin shaft (62) respectively, and the left trimming connecting rod is used for driving the limiting pin shaft (62) to be inserted into or separated from the joint of the two adjacent left trimming connecting rods.
3. The thread trimming mechanism of a sewing machine according to claim 2, wherein the left thread trimming connecting assembly (5) comprises a first left thread trimming link (51) and a second left thread trimming link (52) slidably connected to the first left thread trimming link (51) for respectively supporting the electromagnetic driving member (61), and the electromagnetic limit assembly (6) further comprises:
the first limiting frame (64) is fixedly arranged on the first left trimming connecting rod (51) and used for enabling the limiting pin shaft (62) to penetrate through the first left trimming connecting rod (51), and the first limiting frame (64) is provided with an upper limiting guide sleeve (641) used for guiding the limiting pin shaft (62) to move;
and the second limiting frame (65) is fixedly arranged at one end of the first left trimming connecting rod (51) close to the second left trimming connecting rod (52) and is used for allowing the limiting pin shaft (62) to penetrate through the part of the upper limiting guide sleeve (641), and the second limiting frame (65) is provided with a lower limiting guide sleeve (651) communicated with the upper limiting guide sleeve (641) to guide the limiting pin shaft (62) to continuously move.
4. The thread trimming mechanism of a sewing machine according to claim 3, wherein the outer periphery of the limit pin (62) is fixedly sleeved with an elastic sleeve (66) which is abutted against the upper limit guide sleeve (641) and is used for eliminating noise.
5. The thread trimming mechanism of a sewing machine according to any one of claims 2 to 4, further comprising:
a sliding connecting rod (83) used for adjusting the separation of the double needles;
a position detection device (21) provided to the slide link (83) and configured to detect a position of the slide link (83);
and the control device is respectively connected with the position detection device (21) and the electromagnetic driving part (61) and is used for controlling the electromagnetic driving part (61) to drive the limiting pin shaft (62) to act according to a signal sent by the position detection device (21).
6. The thread trimming mechanism of a sewing machine of claim 5, further comprising:
a support base (9);
a main driving rod (10) with a first end hinged to the supporting seat (9) and a second end mounted on a main driving cam (12), wherein the second end of the main driving rod (10) is provided with a driving roller which is matched with a cam groove of the main driving cam (12) to drive the main driving rod (10) to act;
first end through right side drive pivot with the second end of master drive pole (10) is articulated mutually and the second end with right side trimming actuating lever (3) is kept away from left side trimming coupling assembling (5) one end is articulated mutually, is used for driving right side trimming actuating lever (3) pivoted right side trimming connecting rod (11).
7. The thread trimming mechanism of a sewing machine of claim 6, further comprising:
the first end of the right driving rotating shaft is arranged on a right supporting column arranged on the supporting seat (9), and the second end of the right driving rotating shaft is arranged on a right reset elastic piece (14) used for assisting the main driving rod (10) to automatically reset after the main driving rod (10) acts.
8. The thread trimming mechanism of a sewing machine of claim 5, further comprising:
the left shuttle frame (7) is used for the left moving knife shaft (2) to pass through;
the first end of the left limiting elastic piece is installed on the left trimming drive rod (4), the second end of the left limiting elastic piece is installed on a left supporting column arranged on the left shuttle frame (7), and the left limiting elastic piece (15) is used for limiting the rotation of the left trimming drive rod (4) when any two adjacent left trimming connecting rods slide relatively.
9. The sewing machine thread trimming mechanism of claim 8, further comprising:
a right shuttle frame (16) for the right moving blade shaft (1) to pass through;
a right stop column (17) fixedly arranged on the right shuttle frame (16) and used for limiting the rotation of the right trimming drive rod (3);
and the left stop column (18) is fixedly arranged on the left shuttle frame (7) and is used for limiting the rotation of the left trimming drive rod (4).
10. A sewing machine characterized by a sewing machine body and a sewing machine thread trimming mechanism according to any one of claims 1 to 9 provided to the sewing machine body.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910150531.1A CN109837661B (en) | 2019-02-28 | 2019-02-28 | Sewing machine and thread trimming mechanism thereof |
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| CN201910150531.1A CN109837661B (en) | 2019-02-28 | 2019-02-28 | Sewing machine and thread trimming mechanism thereof |
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| CN109837661B true CN109837661B (en) | 2021-04-27 |
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| CN115506088A (en) * | 2022-09-23 | 2022-12-23 | 吴江阳光科技缝纫机有限公司 | Single-needle and double-needle switchable sewing machine and control method thereof |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT1139233B (en) * | 1981-10-16 | 1986-09-24 | Rockwell Rimoldi S A P | SEWING MACHINE SUITABLE TO PERFORM TWO OR PUU SEWING LINES EQUIPPED WITH MEANS TO INTERRUPT AT LEAST ONE OF THESE SEWING LINES |
| JP2744192B2 (en) * | 1993-10-28 | 1998-04-28 | ジューキ株式会社 | Two-needle sewing machine thread cutting device |
| TW288062B (en) * | 1994-05-27 | 1996-10-11 | Juki Kk | |
| JPH0838775A (en) * | 1994-05-27 | 1996-02-13 | Juki Corp | Two-needle sewing machine |
| CN1054412C (en) * | 1995-03-28 | 2000-07-12 | 重机公司 | Thread cutting device of two-needle sewing machine |
| JP3824923B2 (en) * | 2001-12-18 | 2006-09-20 | Ｊｕｋｉ株式会社 | 2-needle sewing machine |
| DE102009039252A1 (en) * | 2009-08-28 | 2011-03-10 | Dürkopp Adler AG | sewing machine |
| CN202559050U (en) * | 2012-04-05 | 2012-11-28 | 宁波舒普机电科技有限公司 | Double-needle loop sewing machine |
| CN102605571B (en) * | 2012-04-05 | 2013-01-30 | 宁波舒普机电科技有限公司 | Double-needle loop sewing machine with thread cutting structure |
| CN204662030U (en) * | 2015-04-11 | 2015-09-23 | 强信机械科技(莱州)有限公司 | Sewing machines thread-trimming lifter-presser foot drive unit |
| CN105970494B (en) * | 2016-06-24 | 2018-10-30 | 杰克缝纫机股份有限公司 | Integral type presser foot lifter cutting facility and sewing machine |
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Address after: 318000 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. |