CN2600469Y

CN2600469Y - Throat plate assembly of sewing machine

Info

Publication number: CN2600469Y
Application number: CN 02288488
Authority: CN
Inventors: 卢金荣
Original assignee: SHANGHAI YINGJI PRECISION INDUSTRY Co Ltd
Current assignee: SHANGHAI YINGJI PRECISION INDUSTRY Co Ltd
Priority date: 2002-12-19
Filing date: 2002-12-19
Publication date: 2004-01-21
Anticipated expiration: 2012-12-19

Abstract

A needle plate combination of a sewing machine includes a needle plate and an elastic piece, wherein, the needle plate is provided with a slot which is arranged on the same central line with a middle feed hole and a needle hole; a fixed arm of the one end of the elastic piece is arranged on the needle plate while a free arm on the other end extends along the slot and reaches to a position higher than the needle plate surface. The device has such advantages in that the influence over sewing speed of the folded part of the materials being sewn can be avoided, which makes the sewing stitches consistent and improves quality of products being sewn.

Description

A kind of Sewing machines needle plate combination

Technical field:

The utility model relates to a kind of Sewing machines needle plate combination, and this needle plate combination can be avoided making thing and shorten wrinkle into, and makes seam order unanimity.

Background technology:

As shown in Figure 1, the sewing principle roughly is such: will make thing 4 and place above the Sewing machines needle plate 5, put down and press step pin 3 to push down to make thing 4, then step on floor push, start Sewing machines, utilize the reciprocating motion of work feed tooth, coordinating operation person's cooperation, to make thing 4 and push according to set direction, by car pin 6 that the bottom line that reaching the standard grade of carrying of bobbin and shuttle carry is linked more therebetween, make and make thing 4 typings.

As mentioned above, be to be clamped in needle plate 5 and to press to go on foot between the pin 3 because of making thing 4, push by the work feed tooth and advance.Therefore, when making thing 4 for formation state, sewing speed can be consistent, and seam order 41 is even naturally, i.e. suture length unanimity.Yet, need the doubling sewing in case make thing, or will engage together sewing to two cloth the time, the other parts of making thing because of the part of doubling (or overlapping) are thick, make between the smooth part of making thing and doubling (or overlapping) part and produced difference of height, wherein (or overlapping) part is the seam journey of going up a slope from smooth part to doubling, is divided into descending seam journey from doubling (or overlapping) part to evener.As shown in Figure 2, owing to go up a slope when stitching journey, the resistance of sewing is bigger, send the leg speed degree slack-off relatively (as the slack-off reason of automobile ascending speed), and it is shorter therefore to stitch order; Otherwise during descending seam journey, because of the relation of acceleration of gravity is arranged, sewing speed accelerates, so the seam order is longer, the result makes to make thing and shorten wrinkle easily into, and causes stitching the order inequality, and promptly suture is different in size, makes article matter and influence.

Summary of the invention:

The purpose of the utility model promptly causes the shortcoming of seam order inequality in solution, and provide a kind of Sewing machines needle plate to make up, the combination of this Sewing machines needle plate can make makes thing and keeps smooth because of the part of doubling (or overlapping) thickening, make sewing speed unlikely be subjected to this doubling (or overlapping) some effects and slack-off, accelerate, avoid making thing and shorten wrinkle into because of sewing speed differs, and guarantee to stitch the order unanimity, improve and make article matter.

The utility model is achieved in that the combination of a kind of Sewing machines needle plate, forms by a needle plate and shell fragment, wherein needle plate have one and middle perforation and pin hole in the groove cave of same center line; The fixed arm of this shell fragment one end is locked in needle plate, and the free arm of opposite end extends along the groove cave, and is higher than the needle plate surface.

Advantage of the present utility model: when bearing the pressure of pressing the step pin, with make thing doubling (or overlapping) part and together sink in the groove cave and be out of shape, support this doubling (or overlapping) part with its shell fragment recuperability of nationality, make it keep the state concordant with needle plate, guarantee sewing speed unlikely be subjected to this doubling (or overlapping) some effects and slack-off, accelerate, avoid making thing and shorten wrinkle into, and make seam order unanimity, improve and make article matter because of sewing speed differs.

Description of drawings:

Fig. 1: be the use schematic diagram of existing Sewing machines needle plate.

Fig. 2: be the result schematic diagram of existing Sewing needles wooden handcart seam, signal seam order is in doubling (or overlapping) part situation different in size.

Fig. 3: be the schematic diagram of Sewing machines needle plate of the present utility model combination.

Fig. 4: be branch Jie schematic diagram of Sewing machines needle plate of the present utility model combination.

Fig. 5: be the cut-away view of the A-A of the utility model Fig. 3.

Fig. 6: be the work schematic diagram of Sewing machines needle plate of the present utility model combination.

Fig. 7: be Sewing machines needle plate combination schematic diagram of the present utility model, signal seam order is in the situation of doubling (or overlapping) part length unanimity.

Specific embodiments:

Other purpose of the utility model and characteristics can be clear fully with reference to the specific embodiment explanation of following cooperation diagram.

Extremely shown in Figure 5 as Fig. 3, the Sewing machines needle plate of specific implementation the utility model combination 10 is made up of a needle plate 1 and shell fragment 2, wherein needle plate 1 is except the configuration of needle plate commonly used, further comprise a rectangular slot cave 11, this groove cave 11 between first perforation 14 and the 3rd perforation 16, and with second (centre) perforation 15 and pin hole 17 on same center line.First end 12 in described groove cave 11 is near pin hole 17, second end 13 is away from pin hole 17, and the edge from second end 13 to needle plate 1 an and groove 18 is arranged, the width of this groove 18 and groove cave 11 are with wide, the degree of depth is equivalent to the thickness of shell fragment 2, to admit the fixed arm 21 of shell fragment 2.In addition, a screwed hole 19 is arranged on the groove 15, allow that a screw 24 screws in, shell fragment 2 is calmed on needle plate 1, make the fixed arm 21 of shell fragment 2 must be concordant, avoid that operation impacts to sewing with needle plate 2 surfaces with nationality screw 24.

Fig. 3 is to shown in Figure 5 for another example, shown in shell fragment 2 strike out prolate shape for spring steel, wherein an end is a fixed arm 21, opposite end is a free arm 22, this fixed arm 21 has counter sink 23, above-mentioned screw 24 passes counter sink 23 backs and screws in this screwed hole 19, is locked on the needle plate 2 with the fixed arm 21 with shell fragment 2.22 of the free arms of shell fragment 2 extend to first end 12 in groove cave 11, and are higher than the surface of needle plate 2, sink to when being convenient to bear the pressure of pressing step pin 3 in the groove cave 11 and are out of shape, and take this to produce an elastic recovering force and support and make thing.

Construct according to this, as shown in Figure 6, when making thing 4 doublings (or overlapping) part conduct pressure step pin 3, owing to be subjected to pressing the pressure of step pin 3 can sink in the groove cave 11; On the other hand, when the strength of pressing step pin 3 is added in the free arm 22 of shell fragment 2, this free arm 22 can sink to groove cave 11 equally and be out of shape, thereby the elastic-restoring force that can utilize free arm 22 to produce because of distortion, support this doubling (or overlapping) part, make it concordant with needle plate 2 surfaces as far as possible, keep making thing 4 in formation state, to keep the same sewing speed, not reason meet with doubling (or overlapping) part and slack-off, accelerate, avoid making thing and shorten wrinkle into, and make seam order 41 unanimities (Fig. 7), improve and make thing 4 qualities.

Certainly, the foregoing description can be under spirit that does not break away from the utility model and scope in addition some variations, so above explanation comprises and accompanying drawing shown in whole items should be considered as exemplary and non-limiting.

Claims

1. Sewing machines needle plate combination, form by a needle plate 1 and shell fragment 2, described needle plate is provided with first perforation 14, second perforation 15, the 3rd perforation 16 and pin hole 17, the second perforations 15 between first perforation 14 and the 3rd perforation 16, and and pin hole 17 on same center line; It is characterized in that: also be provided with on the needle plate one with second perforation and pin hole groove cave 11 at same center line; The fixed arm 21 of described shell fragment 2 one ends is locked in needle plate 1, and the free arm 22 of opposite end is 11 extensions along the groove cave, and are higher than needle plate 1 surface.