阅读说明：本技术 一种钉扣机及其抬压剪线机构 (Button sewing machine and lifting, pressing and wire shearing mechanism thereof ) 是由 冯志法 何洗源 吴明明 吴慧军 于 2020-11-13 设计创作，主要内容包括：本发明公开了一种抬压剪线机构,包括：电磁铁、曲柄、旋转轴、抬压摆臂、抬压传动组件、钮夹以及剪线摆臂、剪线传动组件、剪线连接杆,其中曲柄的一端与旋转轴连接,另一端供电磁铁触压,旋转轴可绕其轴线转动；抬压摆臂的一端固定在旋转轴上,另一端与抬压传动组件连接,抬压传动组件与钮夹连接；剪线摆臂的一端固定在旋转轴上,另一端与剪线传动组件连接,剪线传动组件与剪线连接杆连接。由于电磁铁通过触压的方式来提供动力,因此相对于传统的电磁铁放置方式,可避免铁芯倾斜,此外通过旋转轴来传递钮夹抬起和剪线的动力,可减小电磁铁所需的吸合力,进而提高电磁铁的使用寿命。(The invention discloses a lifting and pressing wire shearing mechanism, which comprises: the wire cutting device comprises an electromagnet, a crank, a rotating shaft, a lifting and pressing swing arm, a lifting and pressing transmission assembly, a button clamp, a wire cutting swing arm, a wire cutting transmission assembly and a wire cutting connecting rod, wherein one end of the crank is connected with the rotating shaft, the other end of the crank is provided with a power supply magnet for contact pressing, and the rotating shaft can rotate around the axis of the rotating shaft; one end of the lifting and pressing swing arm is fixed on the rotating shaft, the other end of the lifting and pressing swing arm is connected with the lifting and pressing transmission assembly, and the lifting and pressing transmission assembly is connected with the button clamp; one end of the trimming swing arm is fixed on the rotating shaft, the other end of the trimming swing arm is connected with the trimming transmission assembly, and the trimming transmission assembly is connected with the trimming connecting rod. Because the electromagnet provides power by means of contact pressing, compared with the traditional electromagnet placing mode, the iron core can be prevented from inclining, in addition, the power of button clip lifting and thread cutting is transmitted through the rotating shaft, the suction force required by the electromagnet can be reduced, and the service life of the electromagnet is further prolonged.)

1. A lift-press wire shearing mechanism is characterized by comprising:

the electromagnet is used for pressing the crank so as to drive the rotating shaft to rotate;

the button clamp comprises a lifting and pressing swing arm, a lifting and pressing transmission assembly and a button clamp, wherein one end of the lifting and pressing swing arm is fixed on the rotating shaft, the other end of the lifting and pressing swing arm is connected with the lifting and pressing transmission assembly, the lifting and pressing transmission assembly is connected with the button clamp, and the lifting and pressing swing arm is used for lifting the button clamp through the lifting and pressing transmission assembly;

the thread trimming mechanism comprises a thread trimming swing arm, a thread trimming transmission assembly and a thread trimming connecting rod, wherein one end of the thread trimming swing arm is fixed on the rotating shaft, the other end of the thread trimming swing arm is connected with the thread trimming transmission assembly, the thread trimming transmission assembly is connected with the thread trimming connecting rod, and the thread trimming swing arm is used for driving the thread trimming connecting rod to move through the thread trimming transmission assembly.

2. The pressure-lifting wire shearing mechanism according to claim 1, further comprising a torsion spring, wherein the torsion spring is fixedly sleeved on the rotating shaft, a leading-out end of the torsion spring is fixedly connected with one end of the crank, and one end of the rotating shaft is rotatably connected to the other end of the crank.

3. The pressure-lifting wire cutting mechanism according to claim 2, wherein a roller is further disposed at an end of the crank connected to the torsion spring, and the electromagnet is disposed above the roller and is configured to press the roller to rotate the rotating shaft.

4. The uplifting and pressing wire shearing mechanism as claimed in claim 1, wherein the uplifting and pressing transmission assembly comprises an uplifting and pressing rod and an uplifting and pressing hook, the upper end of the uplifting and pressing rod is hinged with the tail end of the uplifting and pressing swing arm, the lower end of the uplifting and pressing rod is connected with the upper end of the uplifting and pressing hook, and a button clamp hook used for being connected with the uplifting and pressing hook is arranged on the button clamp.

5. The lift-press wire shearing mechanism according to claim 4, wherein the lift-press hook is an L-shaped hook.

6. The pressure-lifting wire shearing mechanism as claimed in claim 4, wherein the pressure-lifting lever is an L-shaped pressure-lifting lever, the upper end of the L-shaped pressure-lifting lever is hinged to the end of the pressure-lifting swing arm, and the upper end of the pressure-lifting hook is detachably connected to the lower end of the L-shaped pressure-lifting lever.

7. The lift-press wire cutting mechanism according to any one of claims 1 to 6, wherein the wire cutting transmission assembly comprises a wire cutting push rod, one end of the wire cutting push rod is hinged to the wire cutting connecting rod, and the other end of the wire cutting push rod is hinged to the wire cutting swing arm.

8. The lift-press wire shearing mechanism according to claim 7, wherein the wire shearing transmission assembly further comprises a wire shearing connecting rod, a wire shearing crank and a support, the upper end of the wire shearing connecting rod is hinged to the wire shearing swing arm, the lower end of the wire shearing connecting rod is hinged to one end of the wire shearing crank, the other end of the wire shearing crank is hinged to the wire shearing push rod, and a body of the wire shearing crank is hinged to the support.

9. The lift-press wire shearing mechanism according to claim 8, wherein the wire shearing push rod comprises an L-shaped connecting plate and a push rod, one end of the push rod is detachably connected with one end of the L-shaped connecting plate, and the other end of the L-shaped connecting plate is hinged with the wire shearing crank.

10. A button attaching machine comprising the pressure-lifting wire cutting mechanism according to any one of claims 1 to 9.

Technical Field

The invention relates to the field of sewing, in particular to a lifting and pressing thread trimming mechanism and a button sewing machine comprising the lifting and pressing thread trimming mechanism.

Background

Existing button sewing machines are typically provided with a presser foot lifting mechanism and a thread trimming mechanism, typically driven by mechanical force or an electromagnet.

For the mechanical force driving mode, because the two mechanisms have linkage relation, the trimming or lifting action can not be adjusted independently according to the sewing effect, and in addition, the problems of easy abrasion, low service life of the motor and the like exist.

For the mode of electromagnet driving, the electromagnet is horizontally placed, the iron core of the electromagnet slides out when the power is off, the iron core inclines under the action of gravity, the flexibility of the electromagnet during attraction is poor, the structure is complex, a labor-consuming lever mechanism exists, and the attraction force required by a large magnet is increased.

Therefore, how to provide a lifting and pressing wire shearing mechanism with a simple structure and reduced electromagnet load is a technical problem which needs to be solved urgently by the technical personnel in the field.

Disclosure of Invention

One object of the present invention is to provide a pressure-lifting thread trimming mechanism, which can effectively solve the problems of large electromagnet load, complex structure, short service life, etc., and another object is to provide a button sewing machine comprising the pressure-lifting thread trimming mechanism.

In order to solve the technical problems, the invention provides the following technical scheme:

a lift-press wire shearing mechanism comprising:

the electromagnet is used for pressing the crank so as to drive the rotating shaft to rotate;

the button clamp comprises a lifting and pressing swing arm, a lifting and pressing transmission assembly and a button clamp, wherein one end of the lifting and pressing swing arm is fixed on the rotating shaft, the other end of the lifting and pressing swing arm is connected with the lifting and pressing transmission assembly, the lifting and pressing transmission assembly is connected with the button clamp, and the lifting and pressing swing arm is used for lifting the button clamp through the lifting and pressing transmission assembly;

the thread trimming mechanism comprises a thread trimming swing arm, a thread trimming transmission assembly and a thread trimming connecting rod, wherein one end of the thread trimming swing arm is fixed on the rotating shaft, the other end of the thread trimming swing arm is connected with the thread trimming transmission assembly, the thread trimming transmission assembly is connected with the thread trimming connecting rod, and the thread trimming swing arm is used for driving the thread trimming connecting rod to move through the thread trimming transmission assembly.

Preferably, still include the torsional spring, the fixed cover of torsional spring is established on the rotation axis, the end of drawing forth of torsional spring with articulate one end fixed connection, the one end rotation of rotation axis is connected articulate the other end.

Preferably, the crank is further provided with a roller at one end connected with the torsion spring, and the electromagnet is located above the roller and used for touching and pressing the roller to drive the rotating shaft to rotate.

Preferably, the pressure lifting transmission assembly comprises a pressure lifting rod and a pressure lifting hook, the upper end of the pressure lifting rod is hinged to the tail end of the pressure lifting swing arm, the lower end of the pressure lifting rod is connected with the upper end of the pressure lifting hook, and a button clamp hook used for being connected with the pressure lifting hook is arranged on the button clamp.

Preferably, the lifting and pressing hook is an L-shaped hook.

Preferably, the pressure lifting rod is an L-shaped pressure lifting rod, the upper end of the L-shaped pressure lifting rod is hinged to the tail end of the pressure lifting swing arm, and the upper end of the pressure lifting hook is detachably connected with the lower end of the L-shaped pressure lifting rod.

Preferably, the thread trimming transmission assembly comprises a thread trimming push rod, one end of the thread trimming push rod is hinged to the thread trimming connecting rod, and the other end of the thread trimming push rod is hinged to the thread trimming swing arm.

Preferably, the thread cutting transmission assembly further comprises a thread cutting connecting rod, a thread cutting crank and a support, the upper end of the thread cutting connecting rod is hinged to the thread cutting swing arm, the lower end of the thread cutting connecting rod is hinged to one end of the thread cutting crank, the other end of the thread cutting crank is hinged to the thread cutting push rod, and the body of the thread cutting crank is hinged to the support.

Preferably, the trimming push rod comprises an L-shaped connecting plate and a push rod, one end of the push rod is detachably connected with one end of the L-shaped connecting plate, and the other end of the L-shaped connecting plate is hinged to the trimming crank.

A button sewing machine comprising the pressure-lifting thread trimming mechanism.

Compared with the prior art, the technical scheme has the following advantages:

according to the button sewing machine and the pressure lifting and cutting mechanism thereof, when the electromagnet is electrified and is pressed down after being contacted with the crank, the crank rotates, so that the rotating shaft rotates along with the crank, the pressure lifting and cutting swing arm is driven to swing, and when the pressure lifting and cutting swing arm swings, the button clamp can be lifted through the pressure lifting transmission assembly, so that the pressure lifting and cutting action is completed; when the trimming swing arm swings, the trimming connecting rod can be driven to move through the trimming transmission assembly, so that the scissors are pushed forwards and backwards to finish trimming. Because the electromagnet provides power by means of contact pressing, compared with the traditional electromagnet placing mode, the iron core can be prevented from inclining, in addition, the power of button clip lifting and thread cutting is transmitted through the rotating shaft, the suction force required by the electromagnet can be reduced, and the service life of the electromagnet is further prolonged.

Drawings

In order to more clearly illustrate the technical solutions of the present invention or the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is an exploded view of a pressure-lifting wire cutting mechanism according to an embodiment of the present invention.

The reference numbers are as follows:

the device comprises an electromagnet 1, a roller 2, a crank 3, a torsion spring 4, a rotating shaft 5, a thread cutting swing arm 6, a thread cutting connecting rod 7, a lifting and pressing swing arm 8, a lifting and pressing rod 9, a lifting and pressing hook 10, a thread cutting crank 11, a thread cutting connecting rod 12, a button clamp 13 and a button clamp hook 14.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.

In the following description, specific details are set forth in order to provide a thorough understanding of the present invention. The invention can be implemented in a number of ways different from those described herein and similar generalizations can be made by those skilled in the art without departing from the spirit of the invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

Referring to fig. 1, fig. 1 is an exploded view of a pressure wire cutting mechanism according to an embodiment of the present invention.

One embodiment of the present invention provides a pressure-lifting wire cutting mechanism, including: the wire cutting machine comprises an electromagnet 1, a crank 3, a rotating shaft 5, a lifting and pressing swing arm 8, a lifting and pressing transmission assembly, a button clamp 13, a wire cutting swing arm 6, a wire cutting transmission assembly and a wire cutting connecting rod 12, wherein one end of the crank 3 is connected with the rotating shaft 5, the other end of the crank is contacted and pressed by the electromagnet 1, and the rotating shaft 5 can rotate around the axis of the rotating shaft; one end of the lifting and pressing swing arm 8 is fixed on the rotating shaft 5, the other end of the lifting and pressing swing arm is connected with a lifting and pressing transmission assembly, and the lifting and pressing transmission assembly is connected with a button clamp 13; one end of the trimming swing arm 6 is fixed on the rotating shaft 5, the other end of the trimming swing arm is connected with the trimming transmission assembly, the trimming transmission assembly is connected with the trimming connecting rod 12, and the trimming connecting rod 12 is horizontally and slidably connected with the needle plate. When the electromagnet 1 is electrified and is pressed down after being contacted with the crank 3, the crank 3 rotates, so that the rotating shaft 5 rotates along with the rotation, the pressure lifting swing arm 8 and the thread cutting swing arm 6 are driven to swing, and when the pressure lifting swing arm 8 swings, the button clamp 13 can be lifted through the pressure lifting transmission assembly, and the pressure foot lifting action is finished; when the trimming swing arm 6 swings, the trimming connecting rod 12 can be driven to move through the trimming transmission component, so that the scissors are pushed forwards and backwards to finish trimming. Because the electromagnet 1 provides power by means of contact pressing, compared with the traditional electromagnet 1 placing mode, the inclination of an iron core can be avoided, in addition, the power of lifting the button clamp 13 and cutting the thread is transmitted through the rotating shaft 5, the suction force required by the electromagnet 1 can be reduced, and the service life of the electromagnet 1 is further prolonged.

Further, still include torsional spring 4, the fixed cover of torsional spring 4 is established on rotation axis 5, and the end of drawing forth of torsional spring 4 is connected with the one end fixed connection of crank 3, and the one end rotation of rotation axis 5 is connected at the other end of crank 3. When the electromagnet 1 touches and presses the tail end of the crank 3, the rotating shaft 5 rotates, meanwhile, the torsion spring 4 contracts, after the electromagnet 1 is powered off, the iron core retracts, and under the action of the elasticity of the torsion spring 4, the crank 3 rotates upwards, so that the wire cutting connecting rod 12 retracts, and the scissors retract; at the same time, the clip hook 14 falls and the clip 13 falls, eventually bringing the button sewing machine into a ready-to-sew state.

In order to reduce the abrasion between the crank 3 and the electromagnet 1, the roller 2 is further arranged at one end of the crank 3, which is connected with the torsion spring 4, and the electromagnet 1 is positioned above the roller 2 and is used for pressing the roller 2 to drive the rotating shaft 5 to rotate. Wherein the connecting position of the torsion spring 4 and the roller 2 are respectively positioned at two sides of the tail end of the crank 3.

Specifically, the lifting and pressing transmission assembly comprises a lifting and pressing rod 9 and a lifting and pressing hook 10, the upper end of the lifting and pressing rod 9 is hinged to the tail end of a lifting and pressing swing arm 8, the lower end of the lifting and pressing rod 9 is connected with the upper end of the lifting and pressing hook 10, a button clamp hook 14 is arranged on a button clamp 13, the lifting and pressing hook 10 is preferably an L-shaped hook, the lifting and pressing rod 9 is preferably an L-shaped lifting and pressing rod 9, the upper end of the L-shaped lifting and pressing rod 9 is hinged to the tail end of the lifting and pressing swing arm 8, the upper end of the lifting and pressing hook 10 is detachably connected with the lower end of the L-shaped lifting and pressing rod 9, for example, a through hole can be formed in the lower end of the L-shaped lifting and pressing rod 9. In addition, the button clip hook 14 is preferably of an inverted V-shaped or n-shaped structure, and the lower end of the L-shaped hook is hooked with the button clip hook 14. Compared with the traditional method of lifting the button clamp 13 through a complex link mechanism, the structure is simple, and the load of the electromagnet 1 can be reduced. In addition, the button clamp 13 can be directly driven to be lifted up through lifting and pressing the swing arm 8, so that the use of a transmission part is reduced, and the driving force of the electromagnet 1 is reduced.

Specifically, the trimming transmission assembly comprises a trimming push rod, one end of the trimming push rod is hinged to the trimming connecting rod 12, the other end of the trimming push rod is hinged to the trimming swing arm 6, and the trimming swing arm 6, the trimming push rod and the trimming connecting rod 12 form a crank 3 slider mechanism.

In addition, the trimming transmission assembly further comprises a trimming connecting rod 7, a trimming crank 11 and a support, the upper end of the trimming connecting rod 7 is hinged to the trimming swing arm 6, namely the trimming connecting rod 7 is controlled by the trimming swing arm 6 to move, the lower end of the trimming connecting rod is hinged to one end of the trimming crank 11, the other end of the trimming crank 11 is hinged to the trimming push rod, and the body of the trimming crank 11 is hinged to the support. When the trimming swing arm 6 drives the trimming connecting rod 7 to move downwards, the trimming crank 11 is pushed by the trimming connecting rod 7, so that the trimming crank 11 rotates, and the trimming connecting rod 12 is driven to move through the trimming push rod.

The trimming push rod comprises an L-shaped connecting plate and a push rod, one end of the push rod is detachably connected with one end of the L-shaped connecting plate, for example, the push rod can be connected through a bolt, and the other end of the L-shaped connecting plate is hinged with the trimming crank 11, for example, the trimming crank is hinged through a pin shaft.

The embodiment of the invention also provides a button sewing machine which comprises the pressure-lifting thread shearing mechanism provided by any one of the embodiments, and the beneficial effects of the pressure-lifting thread shearing mechanism can be achieved by referring to the pressure-lifting thread shearing mechanism, which is not described herein again.

It is further noted that, herein, relational terms such as first and second, and the like may be 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. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.