阅读说明：本技术 一种剪线传动机构及具有该剪线传动机构的缝纫机 (Trimming transmission mechanism and sewing machine with trimming transmission mechanism ) 是由 田国兵 于 2019-09-16 设计创作，主要内容包括：本发明公开了一种剪线传动机构,包括活动刀杆、固定刀杆和导向槽,活动刀杆和固定刀杆并排设于导向槽内,还包括具有预设压缩形变的弹性件,弹性件的第一端设于导向槽,弹性件的第二端与固定刀杆相抵,以对固定刀杆产生压力,使活动刀杆始终分别与固定刀杆和导向槽接触。避免活动刀杆与导向槽之间以及活动刀杆与固定刀杆之间产生间隙。因此,当活动刀杆沿导向槽移动时,可以避免活动刀杆在导向槽和固定刀杆之间晃动,确保导向槽的导向作用,使活动刀杆沿导向槽的长度方向准确移动,从而确保活动刀杆出刀位置的准确性,因此可避免活动刀勾不到针线的情况,避免剪线不良。本发明还公开了一种包括上述剪线传动机构的缝纫机。(The invention discloses a trimming transmission mechanism, which comprises a movable cutter bar, a fixed cutter bar and a guide groove, wherein the movable cutter bar and the fixed cutter bar are arranged in the guide groove side by side, the trimming transmission mechanism also comprises an elastic piece with preset compression deformation, the first end of the elastic piece is arranged in the guide groove, and the second end of the elastic piece is abutted against the fixed cutter bar so as to generate pressure on the fixed cutter bar, so that the movable cutter bar is always respectively contacted with the fixed cutter bar and the guide groove. Gaps are prevented from being generated between the movable cutter bar and the guide groove and between the movable cutter bar and the fixed cutter bar. Therefore, when the movable cutter bar moves along the guide groove, the movable cutter bar can be prevented from swinging between the guide groove and the fixed cutter bar, the guide effect of the guide groove is ensured, the movable cutter bar can accurately move along the length direction of the guide groove, the accuracy of the cutter outlet position of the movable cutter bar is ensured, the condition that the movable cutter bar cannot hook a needle thread can be avoided, and the thread cutting defect is avoided. The invention also discloses a sewing machine comprising the thread cutting transmission mechanism.)

1. The utility model provides a trimming drive mechanism, includes activity cutter arbor (1), fixed cutter arbor (2) and guide way (3), activity cutter arbor (1) with fixed cutter arbor (2) are located side by side in guide way (3), its characterized in that, still including having the elastic component of predetermineeing compression deformation, the first end of elastic component is located guide way (3), the second end of elastic component with fixed cutter arbor (2) offset, in order to be right fixed cutter arbor (2) generate pressure, make activity cutter arbor (1) all the time respectively with fixed cutter arbor (2) with guide way (3) contact.

2. The thread trimming drive mechanism according to claim 1, wherein the first end is adjustably positioned in the guide slot (3) to adjust the pressure exerted by the second end on the stationary knife bar (2) by adjusting the position of the first end.

3. The thread trimming drive mechanism according to claim 2, wherein the guide groove (3) is provided with a force adjusting member with an adjustable position, and the force adjusting member is fixedly provided with a receiving part for arranging the first end.

4. The thread trimming transmission mechanism according to claim 3, wherein the force adjusting member is an adjusting screw (5) threadedly coupled with the guide slot (3), and the receiving portion is a nut top portion of the adjusting screw (5), so as to change the position of the nut top portion by adjusting the screwing length of the adjusting screw (5) and the guide slot (3).

5. A thread trimming drive according to claim 3, wherein the resilient member is a spring plate (4), the spring plate (4) being hingedly connected to the guide slot (3), the first end abutting the receiving portion.

6. A trimming transmission according to claim 1, wherein the second end is provided with an arc-shaped portion (41) for abutment against the stationary knife bar (2).

7. The trimming transmission according to anyone of claims 1 to 6, wherein a first rolling member (6) is provided between the movable cutter bar (1) and the guide groove (3); and a second rolling part (7) is arranged between the fixed cutter bar (2) and the guide groove (3).

8. The trimming transmission mechanism according to claim 7, wherein the number of the first rolling member (6) and the second rolling member (7) is one, the first rolling member (6) is disposed at one end of the guide groove (3) close to the elastic member, and the second rolling member (7) is disposed at one end of the guide groove (3) far away from the elastic member.

9. A trimming transmission according to claim 7, wherein the guide slot (3) is provided with:

-a first supporting pin for articulation with said first rolling element (6);

A second support pin for articulation (7) with said second rolling member.

10. A sewing machine including a thread trimming actuator, wherein the thread trimming actuator is as claimed in any one of claims 1 to 9.

Technical Field

The invention relates to the technical field of sewing equipment, in particular to a thread cutting transmission mechanism. In addition, the invention also relates to a sewing machine comprising the thread trimming transmission mechanism.

Background

the present thread cutting transmission mechanism of a sewing machine is generally shown in fig. 5, and comprises a movable cutter bar 01, a fixed cutter bar 02 and a guide groove 03, wherein a movable knife 04 is arranged at one end of the movable cutter bar 01, a fixed knife 05 is arranged at one end of the fixed cutter bar 02, the fixed cutter bar 02 and the movable cutter bar 01 are arranged in the guide groove 03 side by side, the movable cutter bar 01 is connected with a thread cutting driving mechanism through a knife handle 06, during thread cutting, under the action of the thread cutting driving mechanism, the knife handle 06 drives the movable cutter bar 01 to move back and forth along the guide groove 03, so that the movable knife 04 can hook threads, then the movable knife is retracted to be matched with the fixed knife 05 to cut off threads, and a.

In order to make the tangent position as far forward as possible and avoid collision between the fixed knife 05 and the movable knife 04 when the movable knife 04 continues to retract after the cutting line, the cutter device further comprises a baffle 07 connected with the fixed knife rod 02 and a spring 08 for driving the baffle 07 to return. When the knife handle 06 drives the movable knife bar 01 to return to a certain position, the movable knife bar 01 abuts against the baffle 07, so that when the movable knife bar 01 continues to return, the baffle 07 is driven to drive the fixed knife bar 02 to return together, and the fixed knife bar 02 moves backwards along the guide groove 03; when the knife handle 06 drives the movable knife bar 01 to go out of the knife hook line, under the action of the spring 08, the driving baffle 07 pushes the fixed knife bar 02 to move forward along the guide groove 03, so that the fixed knife 05 extends out to the tangent position.

That is, in the process of trimming, the movable cutter bar 01 and the fixed cutter bar 02 continuously reciprocate along the guide groove 03, under the action of the friction force of the movable cutter bar 01 and the guide groove 03, the movable cutter bar 01 and the fixed cutter bar 02 and the guide groove 03, the matching surfaces of the three are gradually abraded, therefore, as the service time increases, the fit clearance among the movable cutter bar 01, the fixed cutter bar 02 and the guide groove 03 increases, causing the movable cutter bar 01 to shake in the guide groove 03, as can be seen from fig. 3, according to the lever principle, when the movable cutter bar 01 shakes in the small gap of the guide groove 03, the cutter-discharging position of the movable cutter 04 is also changed greatly, so that the cutter-discharging position of the movable cutter 04 is inaccurate, and then in the high-speed thread trimming process, the movable knife 04 can not accurately hook the needle thread, so that the thread trimming is poor.

Therefore, how to provide a trimming transmission mechanism capable of avoiding poor trimming is a problem to be solved by those skilled in the art.

Disclosure of Invention

In view of this, the present invention provides a thread cutting transmission mechanism, which can ensure the cutting position of the movable cutter bar and avoid poor thread cutting.

Another object of the present invention is to provide a sewing machine including the above thread cutting transmission mechanism, which can ensure the stability of the thread cutting.

In order to achieve the above purpose, the invention provides the following technical scheme:

The utility model provides a trimming drive mechanism, includes activity cutter arbor, fixed cutter arbor and guide way, the activity cutter arbor with fixed cutter arbor is located side by side in the guide way, still including having the elastic component of predetermineeing compression deformation, the first end of elastic component is located the guide way, the second end of elastic component with fixed cutter arbor offsets, and is right fixed cutter arbor produces pressure, makes the activity cutter arbor all the time respectively with fixed cutter arbor with the guide way contacts.

Preferably, the first end is arranged in the guide groove in an adjustable position, so that the pressure applied by the second end to the fixed cutter bar can be adjusted by adjusting the position of the first end.

Preferably, the guide groove is provided with a force adjusting part with an adjustable position, and the force adjusting part is fixedly provided with a bearing part for arranging the first end.

Preferably, the force adjusting member is an adjusting screw in threaded connection with the guide groove, and the receiving portion is a nut top of the adjusting screw, so that the position of the nut top is changed by adjusting the screwing length of the adjusting screw and the guide groove.

Preferably, the elastic member is a spring piece, the spring piece is hinged to the guide groove, and the first end abuts against the bearing part.

Preferably, the second end is provided with an arc-shaped portion for abutting against the fixed cutter bar.

Preferably, a first rolling part is arranged between the movable cutter bar and the guide groove; and a second rolling part is arranged between the fixed cutter bar and the guide groove.

preferably, the number of the first rolling element and the second rolling element is one, the first rolling element is arranged at one end of the guide groove close to the elastic element, and the second rolling element is arranged at one end of the guide groove far away from the elastic element.

Preferably, the guide groove is provided with:

a first support pin for hinging with the first rolling element;

A second support pin for hinging with the second rolling member.

A sewing machine comprises a trimming transmission mechanism, wherein the trimming transmission mechanism is any one of the trimming transmission mechanisms.

The invention provides a trimming transmission mechanism, which is characterized in that an elastic part is additionally arranged on the basis of the existing trimming transmission mechanism, one end of the elastic part is arranged in a guide groove, the other end of the elastic part is abutted against a fixed cutter bar, the elastic part has preset compression deformation to generate pressure on the fixed cutter bar, so that the fixed cutter bar is pressed towards a movable cutter bar, and the movable cutter bar is pressed towards the side wall of the guide groove under the force transmission action of the fixed cutter bar, so that the movable cutter bar is always contacted with the fixed cutter bar and the guide groove, and gaps are prevented from being generated between the movable cutter bar and the guide groove and between the movable cutter bar and the fixed cutter bar. Therefore, when the movable cutter bar moves along the guide groove, the movable cutter bar can be prevented from swinging between the guide groove and the fixed cutter bar, the guide effect of the guide groove is ensured, the movable cutter bar can accurately move along the length direction of the guide groove, the accuracy of the cutter outlet position of the movable cutter bar is ensured, the condition that the movable cutter bar cannot hook a needle thread can be avoided, and the thread cutting defect is avoided.

The sewing machine provided by the invention comprises the thread cutting transmission mechanism, so that the stability of thread cutting can be ensured.

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 schematic structural diagram of a trimming transmission mechanism according to an embodiment of the present invention;

FIG. 2 is an enlarged view of a portion of FIG. 1;

FIG. 3 is a force-bearing diagram of the trimming mechanism shown in FIG. 1;

FIG. 4 is a schematic view of the spring plate of FIG. 1;

Fig. 5 is a schematic structural diagram of a trimming transmission mechanism in the prior art.

The reference numerals in fig. 1-4 are as follows:

the cutter comprises a movable cutter bar 1, a fixed cutter bar 2, a guide groove 3, a spring piece 4, an arc part 41, an adjusting screw 5, a first rolling piece 6, a second rolling piece 7 and an installation bottom plate 8.

the reference numerals in fig. 5 are as follows:

01 is a movable cutter bar, 02 is a fixed cutter bar, 03 is a guide groove, 04 is a movable cutter, 05 is a fixed cutter, 06 is a cutter handle, 07 is a baffle, 08 is a spring.

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.

the core of the invention is to provide a trimming transmission mechanism which can ensure the cutter outlet position of the movable cutter bar and avoid poor trimming. Another core of the present invention is to provide a sewing machine including the above thread cutting transmission mechanism, which can ensure the stability of the thread cutting.

Referring to fig. 1 to 4, fig. 1 is a schematic structural diagram of a trimming transmission mechanism according to an embodiment of the present invention; FIG. 2 is an enlarged view of a portion of FIG. 1; FIG. 3 is a force-bearing diagram of the trimming mechanism shown in FIG. 1; fig. 4 is a schematic structural view of the spring plate in fig. 1.

the invention provides a trimming transmission mechanism, which comprises a movable cutter bar 1, a fixed cutter bar 2, a guide groove 3 and an elastic piece.

It should be noted that the main structures of the movable cutter bar 1, the fixed cutter bar 2 and the guide groove 3 are respectively the same as the structures of the conventional movable cutter bar 1, the fixed cutter bar 2 and the guide groove 3 in the prior art, and the relative position relationship among the movable cutter bar 1, the fixed cutter bar 2 and the guide groove 3 and the movement modes of the movable cutter bar 1 and the fixed cutter bar 2 can be referred to in the prior art, and are not described herein again.

The main invention point of the invention is that an elastic element is added on the basis of the existing trimming transmission mechanism, one end of the elastic element is arranged in the guide groove 3, the other end of the elastic element is abutted against the fixed cutter bar 2, the elastic element has preset compression deformation to generate pressure on the fixed cutter bar 2, so that the fixed cutter bar 2 presses the movable cutter bar 1, and under the force transmission action of the fixed cutter bar 2, the movable cutter bar 1 presses the side wall of the guide groove 3, so that the movable cutter bar 1 is always contacted with the fixed cutter bar 2 and the guide groove 3, and gaps are prevented from being generated between the movable cutter bar 1 and the guide groove 3 and between the movable cutter bar 1 and the fixed cutter bar 2. Therefore, when the movable cutter bar 1 moves along the guide groove 3, the movable cutter bar 1 can be prevented from shaking between the guide groove 3 and the fixed cutter bar 2, the guide effect of the guide groove 3 is ensured, the movable cutter bar 1 can accurately move along the length direction of the guide groove 3, and the accuracy of the cutter outlet position of the movable cutter bar 1 is ensured, so that the condition that the movable cutter bar cannot hook a needle thread is avoided, and the poor thread cutting is avoided.

For convenience of description, in the present invention, an end of the elastic member disposed in the guide groove 3 is referred to as a first end, and an end of the elastic member abutting against the fixed blade bar 2 is referred to as a second end.

It should be noted that the present invention does not limit the specific shape and structure of the elastic member, as long as the elastic member has a predetermined compression deformation and can exert a pressure on the fixed tool bar 2.

Further, the present invention does not limit the preset amount of compressive deformation of the elastic member, and it can be understood that the preset amount of compressive deformation needs to be greater than the wear gap caused by the movable cutter bar 1 and the fixed cutter bar 2 during the moving process, so that the movable cutter bar 1 can always contact with the sidewall of the guide groove 3.

It can be understood that the larger the compression deformation of the elastic member, the larger the pressure applied by the second end to the fixed cutter bar 2, and at the same time, the larger the friction force between the movable cutter bar 1 and the fixed cutter bar 2 and between the movable cutter bar 1 and the guide groove 3, so that, in order to enable the second end to apply a proper amount of pressure to the fixed cutter bar 2, on the basis of the above-mentioned embodiment, the position of the first end is adjustable and provided in the guide groove 3, so as to adjust the pressure applied by the second end to the fixed cutter bar 2 by adjusting the position of the first end.

That is, the present embodiment adjusts the pressure applied by the second end to the fixed cutter bar 2 by changing the amount of compression deformation of the elastic member by changing the position of the first end on the guide groove 3, so that the second end has a proper pressure.

In view of the convenience of the position adjustment of the first end, on the basis of the above-described embodiment, the guide groove 3 is provided with a position-adjustable force adjusting member, and the force adjusting member is fixedly provided with a receiving portion for providing the first end.

That is, in this embodiment, the first end is provided in the guide groove 3 with the position of the force adjuster adjustable, and the position of the receiving portion is changed by adjusting the position of the force adjuster on the guide groove 3, thereby adjusting the position of the first end.

In the present embodiment, the position adjustment method of the force adjusting member is not particularly limited, and the position of the receiving portion may be changed by adjusting the position of the force adjusting member. For example, the force adjusting piece can be rotatably arranged on the guide groove 3, so that the position of the bearing part can be changed by rotating the force adjusting piece; alternatively, the force adjuster may be movably provided in the guide groove 3 so as to change the position of the receiving portion by moving the position of the entire force adjuster. The skilled person can select them according to the actual need.

Furthermore, the structure of the receiving portion is not limited in this embodiment, the first end may be fixedly connected to the receiving portion, and the first end may also be overlapped or pressed against the receiving portion, so that the first end and the receiving portion are kept relatively fixed by the elastic restoring force of the elastic member.

In consideration of the convenience of adjusting the position of the force adjusting member, on the basis of the above-mentioned embodiment, the force adjusting member is the adjusting screw 5 screwed with the guide groove 3, and the receiving portion is the nut top portion of the adjusting screw 5, so as to change the position of the nut top portion by adjusting the screwing length of the adjusting screw 5 and the guide groove 3.

That is to say, in this embodiment, the first end is located the nut top, and the first end can link firmly with the nut top mutually, also can with nut top looks butt. When the adjusting screw 5 is screwed, the threaded connection length between the adjusting screw 5 and the guide groove 3 can be changed, and the threaded connection length between the adjusting screw 5 and the guide groove 3 is different, so that the height position of the top of the nut relative to the guide groove 3 is different, and therefore, the position of the first end can be changed, and the pressure of the second end can be adjusted.

In view of the simplicity of the specific structure of the elastic member, the elastic member is a spring plate 4, the spring plate 4 is hinged with the guide slot 3, and the first end is abutted with the bearing part.

That is, in the present embodiment, the spring piece 4 is rotatably provided in the guide groove 3 by being hinged to the guide groove 3. Therefore, when the position of the bearing part is changed by adjusting the adjusting part, the first end can drive the spring piece 4 to rotate relative to the hinge shaft, and the second end abuts against the fixed cutter bar 2, so that when the spring piece 4 rotates relative to the hinge shaft, the pressure applied by the second end to the fixed cutter bar 2 is increased or reduced, and the purpose of adjusting the pressure applied by the second end to the fixed cutter bar 2 is achieved.

Further, as described in the background art, since the fixed blade 2 also has the action of reciprocating along the guide groove 3 while the movable blade 1 reciprocates along the guide groove 3, in order to reduce the frictional force between the elastic member and the fixed blade 2, in addition to the above-described embodiments, the second end is provided with the arc portion 41 for abutting against the fixed blade 2.

It will be appreciated that when the arc-shaped portion 41 abuts against the fixed cutter bar 2, the highest point of the arc-shaped portion 41 contacts the fixed cutter bar 2, bringing the second end into line contact with the fixed cutter bar 2, and thus, the frictional force between the second end and the fixed cutter bar 2 can be reduced.

in order to ensure the position stability of the elastic member and avoid the second end from swinging back and forth along the moving direction perpendicular to the fixed cutter bar 2 when the fixed cutter bar 2 moves, on the basis of the above embodiment, the fixed cutter bar 2 is provided with a limit groove for limiting the second end.

That is to say, when the second end offseted with fixed cutter arbor 2, the second end was located the spacing inslot, and the lateral wall of spacing groove plays spacing effect to the second end, avoids the second end to rock along the moving direction of the fixed cutter arbor 2 of perpendicular to.

In order to reduce the friction force between the movable cutter bar 1 and the fixed cutter bar 2 and the guide groove 3 respectively, on the basis of any one of the above embodiments, a first rolling member 6 is arranged between the movable cutter bar 1 and the guide groove 3; a second rolling part 7 is arranged between the fixed cutter bar 2 and the guide groove 3.

It can be understood that, in this embodiment, by respectively setting the first rolling element 6 and the second rolling element 7 between the movable cutter bar 1 and the guide groove 3 and between the fixed cutter bar 2 and the guide groove 3, it is avoided that the movable cutter bar 1 and the fixed cutter bar 2 are respectively contacted with the guide groove 3, therefore, the sliding friction between the movable cutter bar 1 and the guide groove 3 and between the fixed cutter bar 2 and the guide groove 3 in the prior art can be changed into the rolling friction, thereby the wear of the movable cutter bar 1, the fixed cutter bar 2 and the guide groove 3 can be reduced, and further, it is ensured that the gap between the movable cutter bar 1, the fixed cutter bar 2 and the guide groove 3 is always within the tolerance allowable range in the long-time use process.

Because first rolling member 6 can avoid movable cutter arbor 1 and guide way 3 contact, second rolling member 7 can avoid fixed cutter arbor 2 and guide way 3 contact, consequently, can reduce the required precision to the 3 notches of guide way, solve among the prior art because of the high problem that the qualification rate that leads to of 3 notch required precision of guide way is low, promote the qualification rate of guide way 3, and then reducible manufacturing cost.

It should be noted that, in this embodiment, the number and the arrangement positions of the first rolling member 6 and the second rolling member 7 are not specifically limited, as long as the first rolling member 6 can be located between the mating surfaces of the movable tool bar 1 and the guide groove 3, and the second rolling member 7 can be located between the mating surfaces of the fixed tool bar 2 and the guide groove 3.

The first rolling part 6 can be arranged on the guide groove 3, can also be arranged on the movable cutter bar 1, and can also be arranged on a third-party supporting part; similarly, the second rolling member 7 may be disposed on the guiding groove 3, or may be disposed on the fixed knife bar 2, or may be disposed on a third-party supporting member. The third-party support means a support distinguished from the guide groove 3, the movable cutter bar 1 and the fixed cutter bar 2, and may be, for example, a mounting base plate 8 of the cutter head.

In addition, the present embodiment does not limit the specific structure of the first rolling member 6 and the second rolling member 7. The first rolling member 6 and the second rolling member 7 may each be a ball, a ball or a roller, or the like.

Further, in view of the fact that the gap between the movable tool bar 1 and the guide groove 3 and the gap between the fixed tool bar 2 and the guide groove 3 are not uniform in the initial stage, which usually causes the seizure phenomenon in the moving process of the movable tool bar 1 and/or the fixed tool bar 2 in the prior art, in order to avoid the uneven stress between the movable tool bar 1 and the guide groove 3 and between the fixed tool bar 2 and the guide groove 3 under the action of the elastic member, on the basis of the above embodiment, the number of the first rolling members 6 and the second rolling members 7 is one, and the first rolling members 6 are disposed at one end of the guide groove 3 close to the elastic member, and the second rolling members 7 are disposed at one end of the guide groove 3 far from the elastic member.

It can be understood that, as shown in fig. 3, under the pressure action of the elastic member, the movable cutter bar 1 is pressed at one end of the guide groove 3 close to the elastic member through the force transmission action of the fixed cutter bar 2, and meanwhile, according to the lever principle, the fixed cutter bar 2 is pressed at one end of the guide groove 3 far away from the elastic member, therefore, in view of the force balance action, in order to avoid uneven stress, only one rolling member is arranged between the movable cutter bar 1 and the guide groove 3 and between the fixed cutter bar 2 and the guide groove 3 in the present embodiment, and the first rolling member 6 is arranged at one end of the guide groove 3 close to the elastic member, and the second rolling member 7 is arranged at one end of the guide groove 3 far away from the elastic member.

That is to say, in this embodiment, there are only three points of contact between the movable cutter bar 1 and the guide groove 3 and between the fixed cutter bar 2 and the guide groove 3, which can effectively avoid the phenomenon of uneven stress, thus solving the problem of jamming in the prior art and avoiding the running-in of part of new cutter heads at the initial stage.

In fig. 3, three directions indicated by arrows are a direction in which the first roller 6 acts on the movable blade bar 1, a direction in which the elastic member acts on the fixed blade bar 2, and a direction in which the second roller 7 acts on the fixed blade bar 2.

In view of the specific arrangement positions of the first rolling member 6 and the second rolling member 7, on the basis of the above-described embodiment, the guide groove 3 is provided with a first support pin for hinging with the first rolling member 6 to rotate the first rolling member 6 about the first support pin and a second support pin; the second support pin is used for being hinged with the second rolling member 7, so that the second rolling member 7 rotates around the second support pin, and the structure is simple and convenient to realize.

In addition to the above-mentioned thread cutting transmission mechanism, the present invention also provides a sewing machine including the thread cutting transmission mechanism disclosed in the above-mentioned embodiments, and the structure of other parts of the sewing machine is referred to the prior art, and is not described herein again.

It is further noted that, in the present specification, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

The present invention provides a thread cutting transmission mechanism and a sewing machine having the same. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.