CN207130442U - A kind of anti-Bird's Nest presser feet of computer flat sewing machine - Google Patents

Abstract

A kind of anti-Bird's Nest presser feet of computer flat sewing machine of the utility model, include presser feet head and presser feet bottom plate, the presser feet head is fixedly connected with presser feet bottom plate by latch, spring, fixed block and the blade that suture can be cut are sequentially provided between the presser feet head and presser feet bottom plate, the fixed block and blade are fixed under the spring effect in the presser feet bottom plate；The blade is right triangular shape, and for the blade of the blade on hypotenuse, the angle of the blade is optimal with 30 degree；Being additionally provided with the longitudinal midline of the presser feet bottom plate can be located on the gap by the gap of suture, the blade of the blade, and the angle between the blade and the gap is optimal with 30 degree between 25 degree to 35 degree.A kind of anti-Bird's Nest presser feet of computer flat sewing machine of the utility model, there is blade exchange conveniently, blade service life is longer and the end of a thread residual is shorter.

Description

A kind of anti-Bird's Nest presser feet of computer flat sewing machine

Technical field

It the utility model is related to a kind of sewing-machine foot, and in particular to a kind of anti-Bird's Nest presser feet of computer flat sewing machine.

Background technology

The patent No.：201420621676.8 utility model patent discloses a kind of " band of the anti-Bird's Nest device of computer flat sewing machine Thread cutter concora crush pin ", although solving " Bird's Nest " problem, this presser feet can cause sewing upper thread the end of a thread in the close needle gage of sewing It is long, increase trimming the end of a thread workload, the gap secant on this presser feet blade design one side in the middle part of presser feet bottom, this secant Mode blade can only be kept flat, and the end of a thread that each hooking device is clamped all is cut off in the same point of blade, easily cause blade not cutting edge of a knife or a sword Profit, more allowing blade replacement frequency are high.

The patent No.：201521117462.8 utility model patent discloses, and " a kind of sewing machine removes Bird's Nest rapid changing knife band knife Presser feet ", the presser feet side secant of blade, it is long to also result in sewing upper thread head during close joint withdrawal of needle, increase trimming the end of a thread workload, Crossed beam trunking is also provided with one side in the middle part of its pressing sole simultaneously, the edge of a knife is introduced to cut off by crossed beam trunking when the upper thread clamped plays seam, but It, which lays particular emphasis on, wants the upper thread cut off to accomplish shorter, and makes presser feet shelves line end with off-line groove too perpendicular to eedle position, is so stitching Need to turn left curved or presser feet of object to be sewn is slightly to the left when installing during system, and gear line end is easily caused during sewing and can't stop Line, suture just come into wire casing and encounter blade, and so as to cause broken string, blade need to be designed to V-knife sword, but V-type gradient is very little, cutting Also all almost easily make blade not sharp in same point during suture, so as to increase the frequency of more allowing blade replacement.

And blade pressuring plate is that the difficulty of more allowing blade replacement is added in more allowing blade replacement through fixing by latch.Simultaneously Pressing plate is mounted in presser feet bottom middle, and such usage time is grown, and dust is also easily deposited in this caused by stitchbonded fabric In, cause the activity performance of presser feet to weaken, and dust also easily falls influences quality on stitchbonded fabric.

There is a kind of band knife presser feet in industry at present:Interior wire casing arc end is slotted backward on presser feet, away from circle The groove end at arc end is provided with blade, plays the end of a thread clamped during seam and is being cut off during haul on the top presser feet groove end edge of a knife, is cut Broken string solves " Bird's Nest " problem, but this structure is because arc end is too small, eedle again from circular arc farther out, sew thin material or During softer sewing, sewing, which is easily got into set groove, to be damaged sewed product and occurs the problems such as dropped stitch, sewing thicker raw material Or flannelette sewing when, suture can also be squeezed into the edge of a knife and cut off suture mark, influence quality of sewing, increase defect ware.

Utility model content

The purpose of this utility model is to provide a kind of service life for applying the anti-Bird's Nest in computer flat sewing machine equipment more Long, blade exchange is more convenient, and suture cuts off the shorter presser feet of rear the end of a thread, to solve the technical problem in background technology.

To realize object defined above, the utility model provides following technical scheme：

A kind of anti-Bird's Nest presser feet of computer flat sewing machine, comprising presser feet head and presser feet bottom plate, the presser feet head and presser feet bottom plate lead to Cross latch to be fixedly connected, spring, fixed block are sequentially provided between the presser feet head and presser feet bottom plate and suture can be cut Blade, the fixed block and blade are fixed under the spring effect in the presser feet bottom plate；The blade is right angle trigonometry Shape, for the blade of the blade on hypotenuse, the angle of the blade is optimal with 30 degree；The presser feet bottom plate Longitudinal midline on be additionally provided with and can be located at by the gap of suture, the blade of the blade on the gap, the blade Angle between the gap is optimal with 30 degree between 25 degree to 35 degree.

Further, presser feet bottom upper end centre position is provided with mounting groove, the mounting groove lower floor and the blade Structure is corresponding, and the mounting groove upper strata is corresponding with the fixed-block-architecture (FBA), and the blade and fixed block are correspondingly arranged at the peace In tankage.

Further, the gap width is optimal using 0.8mm 0.6 between 1.0mm.

Further, the eedle groove of the eedle position correspondence with moving up and down, the machine are additionally provided with the presser feet bottom plate The top of needle tray, which is provided with, can correct the taper chamfering that eedle passes through the eedle groove, the eedle groove and the gap Front end penetrates.

Further, prevent the blade from cutting off the rear end of suture when the blade is arranged on dilute seam of the eedle groove, The presser feet head bottom front is provided with crossed beam trunking.

Further, presser feet bottom plate lower surface is between 0.2-0.4mm described in the blade distance, preferably 0.3mm.

Further, the width in the gap is less than the width of the eedle groove, before the eedle groove and the gap Penetrated during the insertion of end using radian transition.

Compared with prior art, the anti-Bird's Nest presser feet of a kind of computer flat sewing machine of the utility model, has the following advantages that：

1. spring is pressed on fixed block, blade is further fixed.Such design can pass through latch just replaceable blade of dismantling Piece, it is very convenient.

2. blade is placed in 30 degree of loxosises, long gap is provided among presser feet bottom, plastic cutter catches on suture, and deflection passes through again to the right Cross gap and crossed beam trunking introduces blade, form edge bevel secant, blade service life is longer.

3. gap and crossed beam trunking ensure that the end of a thread with the use of that effectively can also will carry out secant on suture introducing blade Remain shorter.

Brief description of the drawings

Fig. 1：A kind of anti-Bird's Nest presser feet explosive view of computer flat sewing machine.

Fig. 2：A kind of presser feet bottom plate top view of the anti-Bird's Nest presser feet of computer flat sewing machine.

Fig. 3：A kind of presser feet bottom view of the floor of the anti-Bird's Nest presser feet of computer flat sewing machine.

Fig. 4：Enlarged drawing at A in Fig. 3.

Embodiment

Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the embodiment of the utility model is carried out Clearly and completely describe.

Referring to Fig. 1, in the utility model embodiment, a kind of anti-Bird's Nest presser feet of computer flat sewing machine, first 1 He of presser feet is included Presser feet bottom plate 6, the presser feet first 1 are fixedly connected with presser feet bottom plate 6 by latch 5, the presser feet first 1 and presser feet bottom plate 6 it Between be sequentially provided with spring 2, fixed block 3 and the blade 4 that suture can be cut, the fixed block 3 and blade 4 are made in the spring 2 It is fixed under in the presser feet bottom plate 6.

Referring to Fig. 2, in the utility model embodiment, the blade 4 is right triangular shape, the blade of the blade 4 On hypotenuse, the angle A of the blade is optimal with 30 degree；The upper end centre position of presser feet bottom 6 is provided with peace Tankage 9, the lower floor of mounting groove 9 is corresponding with the structure of blade 4, the upper strata of mounting groove 9 and the structure pair of fixed block 3 Should, when the blade 4 and fixed block 3 are correspondingly arranged in the mounting groove 9, the upper surface of fixed block 3 and presser feet bottom plate 6 In same level, fixed block 3 is arranged on above blade 4, and is pressed on blade 4, the front end of first 1 lower surface of presser feet The front end of fixed block 3 is pressed in, spring 2 is installed in the rear end of first 1 lower surface of presser feet, the top of spring 2 is inserted into presser feet first 1 In the rear end of lower surface, the bottom of spring 2 is suppressed in the rear end of fixed block 3, prevents blade from releasing.

Gap 11 is additionally provided with the longitudinal midline of the presser feet bottom plate 6, suture first passes through gap 11 and then reaches blade again It is upper to be cut off, the width of gap 11 0.6 between 1.0mm, be using 0.8mm it is optimal, when apart from be less than 0.6mm when, blade 4 Length of the blade in gap 11 it is shorter, there is blade 4 can not cut off suture hidden danger but also the service life of blade can be reduced, when Distance is when being more than 1.0mm, and 11 width of gapping becomes big, and after cutting suture, the end of a thread swing in gap 11 is larger, again When stitching again, registration is poor, influences attractive in appearance.The blade of the blade 4 is located on the gap 11, the blade and the seam Angle B between gap 11 is optimal with 30 degree between 25 degree to 35 degree.

The eedle groove 10 of the eedle position correspondence with moving up and down, the eedle groove 10 are additionally provided with the presser feet bottom plate 6 Top be provided with and can correct the taper chamfering 8 that eedle passes through the eedle groove 10, the eedle groove 10 and the gap 11 front end insertion.Due to the needs of anti-Bird's Nest function, suture holding suture is clamped to the right with hooking device in normal work Loose ends device loosens the suture of tension to tension simultaneously, and eedle moves downward when playing seam, but when the loose ends amount deficiency of loose ends device Or during loose ends device exception, eedle can be drawn to the right partially by suture, now, when eedle moves still further below, can be bumped against on presser feet bottom plate and be made Into broken needle, the design of taper chamfering 8, even if it is inclined that eedle can be allowed to be drawn when moving downward by suture, taper chamfering 8 can only be also encountered The conical surface on, then it is downward to prolong the conical surface for eedle, final to realize correction eedle, the effect for preventing eedle to be broken.

The blade 4 is arranged on the rear end of the eedle groove 10, and in the utility model blade 4 position than existing skill Art is compared prevents the blade 4 from cutting off suture more rearward, when advantage is dilute seam.First 1 bottom front of presser feet was provided with line Groove 7.The effect of crossed beam trunking 7 is that suture can lead to the rear end of presser feet first 1 when playing seam suture is cut off so as to be advantageous to blade 4, So crossed beam trunking 7 and blade 4 are used cooperatively, when blade 4 position more rearward when, the depth of crossed beam trunking 7 is also more deepened.

Refer to Fig. 3 and Fig. 4, in the utility model embodiment, the blade 4 exists apart from the lower surface of presser feet bottom plate 6 Between 0.2-0.4mm, preferably 0.3mm.When distance is less than 0.2mm, the distance of stitchbonded fabric and blade 4 can be caused too near, there is knife Piece 4 cuts the quality hidden danger of stitchbonded fabric, when distance is more than 0.4mm, can cause after cutting suture, the length of the end of a thread is oversize.

The width in the gap 11 is less than the width of the eedle groove 10, before the eedle groove 10 and the gap 11 Penetrated during the insertion of end using the transition of radian 12, the distance of the radian 12 to the center of circle of itself is not less than the width of eedle groove 10. It is more beneficial for suppressing relatively thin stitchbonded fabric using the transition of radian 12 insertion, prevents bouncing pilotage or stitchbonded fabric material from entering gap and being cut by blade It is rotten.

Operation principle：

Just automatic shearing after complete one section of each sewing of computer flat sewing machine, is provided with the sewing machine of anti-Bird's Nest device just by hooking Device by upper thread the end of a thread hook clamp, sewing machine again sewing when the first pin wire loop is formed in sewing, as sewing moves together, hook The end of a thread for the deflection that line device is clamped leads to secant below by the pressuring line groove 7 in gap 11, first 1 bottom of presser feet, and blade is in 30 degree of oblique angles Installation, the end of a thread is cut off so suture just forms one kind formula secant that is locked in a seesaw struggle in blade, with oblique knife mode among presser feet bottom plate tiltedly It is shorter than other manner secant that secant remains the end of a thread.Blade service life is also grown.When playing seam machine when backstitching back and forth upper thread with The coincidence of the end of a thread is more preferable, makes stitchbonded fabric suture more attractive, also eliminates artificial trimming process.

The utility model when normal seam is knitted, needle gage can from 2mm (containing) to 5.5mm normal work, blade between (containing) The suture of normal work will not cut off to (at present in apparel industry, needle gage is typically between 2.5mm to 5mm, and needle gage minimum is not 2mm can be less than, maximum is not more than 5.5mm), and the end of a thread stayed on stitchbonded fabric when seam is knitted is very short, when needle gage is 2mm, The end of a thread is not more than 1.5mm, and when needle gage is 5.5mm, the end of a thread is not more than 1mm.

It is obvious to a person skilled in the art that the utility model is not limited to the details of foregoing example embodiment, and And in the case of without departing substantially from spirit or essential attributes of the present utility model, it can realize that this practicality is new in other specific forms Type.Therefore, no matter from the point of view of which point, embodiment all should be regarded as exemplary, and is nonrestrictive, this practicality is new The scope of type limits by appended claims rather than preceding description, it is intended that the equivalency fallen in claim is contained All changes in justice and scope are included in the utility model.Any reference in claim should not be considered as limitation Involved claim.

Moreover, it will be appreciated that although the present specification is described in terms of embodiments, not each embodiment is only wrapped Containing an independent technical scheme, this narrating mode of specification is only that those skilled in the art should for clarity Using specification as an entirety, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art It is appreciated that other embodiment.

Claims (7)

1. a kind of anti-Bird's Nest presser feet of computer flat sewing machine, includes presser feet head and presser feet bottom plate, it is characterised in that：The presser feet head and pressure Sole is fixedly connected by latch, and spring, fixed block are sequentially provided between the presser feet head and presser feet bottom plate and can be cut The blade of slot line, the fixed block and blade are fixed under the spring effect in the presser feet bottom plate；The blade is Right triangular shape, for the blade of the blade on hypotenuse, the angle of the blade is optimal with 30 degree；The pressure Being additionally provided with the longitudinal midline of sole can be located on the gap by the gap of suture, the blade of the blade, institute The angle between blade and the gap is stated between 25 degree to 35 degree.

A kind of 2. anti-Bird's Nest presser feet of computer flat sewing machine according to claim 1, it is characterised in that：Presser feet bottom upper end Centre position is provided with mounting groove, and the mounting groove lower floor is corresponding with the blade structure, the mounting groove upper strata and the fixation Block structure is corresponding, and the blade and fixed block are correspondingly arranged in the mounting groove.

A kind of 3. anti-Bird's Nest presser feet of computer flat sewing machine according to claim 1, it is characterised in that：The gap width exists 0.6 between 1.0mm.

A kind of 4. anti-Bird's Nest presser feet of computer flat sewing machine according to claim 1, it is characterised in that：On the presser feet bottom plate also Eedle groove provided with the eedle position correspondence with up and down motion, the top of the eedle groove are provided with and can correct eedle and pass through The taper chamfering of the eedle groove, the eedle groove and the front end in the gap penetrate.

A kind of 5. anti-Bird's Nest presser feet of computer flat sewing machine according to claim 4, it is characterised in that：The blade is arranged on institute The rear end of eedle groove is stated, the presser feet head bottom front is provided with crossed beam trunking.

A kind of 6. anti-Bird's Nest presser feet of computer flat sewing machine according to claim 1-5 any one, it is characterised in that：The knife Piece is apart from the presser feet bottom plate lower surface between 0.2-0.4mm.

A kind of 7. anti-Bird's Nest presser feet of computer flat sewing machine according to claim 5, it is characterised in that：The width in the gap is small In the width of the eedle groove, the eedle groove and the front end in the gap are penetrated when penetrating using radian transition.