CN205275900U - Sewing machine removes quick tool changing area sword presser foot of bird's nest - Google Patents

Abstract

The utility model belongs to the technical field of sewing machines, in particular to a presser foot with a knife for fast tool change in a sewing machine, which includes a presser handle and a presser plate. The two connecting parts are hinged, and a wire slot is arranged on the presser foot plate at the rear end of the central wire slot. The central wire slot communicates with the wire slot. Located in the blade groove, the blade is set in the blade groove, and the blade of the blade is located above the wire groove; the utility model adopts the blade pressing plate to press the blade and fix it in the blade groove of the presser foot, and the presser foot handle and the presser foot plate are fixed by screws. It is hinged and fixed, while maintaining a certain pressure on the blade by the blade pressure plate to fix the blade. By unscrewing the screw, disassembling the presser foot handle and the blade pressure plate can realize quick tool change without glue, special disassembly tools and other special items. convenient.

Description

A kind of sewing machine to go to the bird's nest and quickly change the knife with a knife presser foot

Technical field:

The utility model belongs to the technical field of sewing machines, in particular to a sewing machine fast knife changing presser foot with a knife for removing the bird's nest.

Background technique:

When the sewing machine sews cloth, a certain length of thread ends must be left at the eye of the machine needle when sewing is started, so as to ensure that the end of thread will not slip out of the eye of the machine needle when sewing starts. A certain length of thread on the eye of the machine needle will stay at the initial position of the fabric when sewing to form a "bird's nest", which affects the appearance of the sewing material.

In order to remove the bird's nest, the processing method generally used at present is to manually pull the end of the thread when sewing, so that the end of the thread is left on the sewing material, and after the sewing work, the end of the thread is manually processed.

The presser foot base plate 1 generally used in the industry has a central wire slot 2, a wire retaining end 3, and a wire slot 4, and does not have a blade function (as shown in Figures 1 and 2).

At present, there is a presser foot with a knife in the industry. There is a gap at the arc end of the central thread groove on the presser foot, and a blade is set at the gap. Bird's Nest" problem. But this band knife presser foot is because the edge of a knife of slit mouth is very close to drop needle hole, and suture head is just cut off together, and thin material sewing is very easy to cause the sewing machine to go off the line. At the same time, the edge of the knife is far away from the center of the stitching stitches, and when sewing thicker fabrics, the upper thread ends of the sewing materials will be too long, which increases the workload of trimming the thread ends; there is a blade slot on the side of the presser foot, and the blade is fixed by glue In the blade groove, it is very troublesome to replace the blade after it is damaged, and special tools are required for disassembly and assembly.

At present, there is another kind of presser foot with a knife in the industry. The arc end of the central line groove on the presser foot is slotted backwards, and a blade is set at the end of the groove far away from the arc end. The edge of the knife on the end of the presser foot groove is cut off, and the thread end is cut off to solve the "bird's nest" problem. However, this structure replaces the original thread retaining arc end of the presser foot and the thread-off groove below it. When sewing thin materials and other soft sewing materials, the sewing material is easy to squeeze into the opened groove and damage the sewing. When sewing thicker or velvet sewing materials, the stitches will be squeezed into the knife edge, and the stitches will be cut off, which will affect the quality of the sewing products and increase the number of defective products. Simultaneously, the side of this presser foot is also provided with blade groove, and blade is fixed in blade groove by glue, and replacement after blade damage is very troublesome, needs special tool to disassemble.

Invention content:

The purpose of the utility model is to provide a sewing machine that can quickly change blades and is convenient for disassembly and assembly, and can quickly change blades and presser feet with a knife when removing the bird's nest.

The utility model is achieved in that:

A sewing machine presser foot with knife for bird's nest quick tool change, including a presser handle and a presser plate, a central thread groove is arranged at the front of the presser foot plate, the presser foot handle is hinged to two connecting parts on the presser foot plate, behind the central thread groove The presser foot plate at the end is provided with a wire groove, the central wire groove communicates with the wire groove, and a blade groove is formed on the presser foot plate between the two connecting parts, the end of the wire groove is located in the blade groove, and the blade is set in the blade groove , the cutting edge of the blade is located above the wire slot.

In the above technical solution, an elastic body is arranged between the bottom plane of the presser handle and the upper plane of the blade, and the elastic body presses the blade into the blade groove.

In the above technical solution, a blade pressing plate is provided between the upper plane of the blade and the bottom plane of the presser foot handle, and the blade pressing plate presses the blade into the blade groove.

In the above technical solution, both ends of the horizontal plate of the blade pressing plate are bent upwards to form a vertical portion, an opening is provided on the horizontal plate corresponding to the position of the blade, and a through hole is provided on the vertical portion to facilitate the passage of screws .

In the above technical solution, the outer walls of the two vertical parts are arranged in close contact with the inner walls of the two connecting parts on the presser foot plate.

In the above technical solution, an elastic body is arranged between the upper plane of the blade pressing plate and the bottom plane of the presser handle, and the elastic body presses the blade pressing plate above the blade to further press the blade into the blade groove;

Or: an elastic body is arranged between the bottom plane of the blade pressing plate and the upper plane of the blade, and the elastic body further compresses the blade in the blade groove.

In the above technical solution, the elastic body is a spring or a sponge or a rubber sheet.

In the above technical solution, the starting point of the thread passing groove is located on the side of the central thread groove of the presser foot plate, and the thread passing groove is set obliquely from the starting point to the thread passing center of the presser foot plate, and its end is located in the center of the thread passing groove.

In the above technical solution, a wire retaining end is formed between the starting point of the wire passing groove and the central wire groove.

In the above technical solution, the blade is provided with an opening, and a V-shaped blade is provided in the opening;

Or: the blade is provided with an opening, and a straight blade is provided in the opening.

Compared with the prior art, the outstanding advantages of the utility model are:

1. The utility model adopts the blade pressing plate to press the blade and fix it in the blade groove of the presser foot. The screw is used to hinge and fix the presser foot handle and the presser foot plate. At the same time, the blade pressing plate maintains a certain pressure on the blade to fix the blade. Screws, detachable presser foot handle, blade pressure plate can realize quick tool change, no special items such as glue, special disassembly tools, etc., easy to disassemble;

2. The utility model adopts the side of the central thread groove to open a thread groove to introduce the obliquely drawn thread head into the knife edge and cut it at the center of the thread, so as to ensure that the remaining thread end on the fabric is shorter and the stitches are beautiful;

3. The thread retaining end of the presser foot and the thread take-off groove of the utility model can effectively prevent the needle thread from entering the thread groove and being cut off at the knife edge, so as to ensure normal sewing performance.

Description of drawings:

Fig. 1 is the three-dimensional schematic view of the presser foot plate of the background technology;

Fig. 2 is the top view of the presser foot plate of background technology;

Fig. 3 is the explosion schematic diagram of the utility model;

Fig. 4 is a three-dimensional schematic diagram of the presser foot plate of the present invention;

Fig. 5 is a top view of the presser foot plate of the present utility model;

Fig. 6 is a front view of the utility model in use;

Fig. 7 is a top view of the utility model in use;

Fig. 8 is a three-dimensional schematic view of the utility model in use.

detailed description:

The utility model is further described below with specific embodiments, referring to Fig. 3-8:

Example 1:

A sewing machine presser foot with a knife for quick tool change without bird's nest, including a presser handle 1 and a presser plate 2, a central thread groove 3 is arranged at the front of the presser plate 2, and the presser handle 1 is connected to the presser plate 2 through a screw 4 or a pin The two connecting parts 5 are hinged with the presser foot plate 2, and the presser foot plate 2 at the rear end of the central wire groove 3 is provided with a wire groove 6, the central wire groove 3 communicates with the wire groove 6, and the presser foot plate between the two connecting parts 5 A blade groove 7 is formed on the 2, the end of the wire passing groove 6 is located in the blade groove 7, and the blade 8 is arranged in the blade groove 7, and the blade 8 of the blade 8 is positioned above the wire passing groove 6. When installing blade 8 and changing blade 8, unscrew screw 4 or pin, pull down presser foot handle 1 and can realize quick tool change.

In the above technical solution, an elastic body is provided between the bottom plane of the presser handle 1 and the upper plane of the blade 8 , and the elastic body further compresses the blade 8 into the blade groove 7 .

Described elastic body is spring or sponge or rubber sheet, also can adopt other.

The starting point 11 of the thread passing groove 6 is located at the central thread groove 3 side of the presser foot plate 2, and the thread passing groove 6 is set obliquely to the thread passing center of the presser foot plate from the starting point 11, and its end 12 is located at the center of the thread passing groove 6. On the bottom plane of the presser foot plate 2 between the central wire groove 3 and the end 12 of the wire passing groove 6, a thread-off groove 24 is arranged.

In the above technical solution, a wire retaining end 13 is formed between the starting point 11 of the wire passing slot 6 and the central wire slot 3 .

In the above technical solution, the blade 8 is provided with a V-shaped opening, and a V-shaped blade 10 is provided in the opening.

In addition to the V-shaped blade 10, it is also possible that: the blade 8 is provided with a square opening, and a straight blade is provided in the square opening.

Example 2:

The structure of this embodiment is basically the same as that of Embodiment 1, the difference being that a blade pressing plate 9 is provided between the blade 8 and the presser handle 1 . The specific structure is as follows:

A blade pressing plate 9 is arranged between the upper plane of the blade 8 and the bottom plane of the presser handle 1 , and the blade pressing plate 9 presses the blade 8 into the blade groove 7 .

The structure of the blade pressing plate 9 is that the two ends of the horizontal plate 14 are bent upwards to form a vertical portion 15, and an opening 16 is provided on the horizontal plate 14 corresponding to the position of the blade, and an opening 16 is provided on the vertical portion 15 to facilitate the screw 4 to pass through. through vias. The screw 4 fixes the blade pressing plate 9 through the through hole, so that the blade pressing plate 9 presses the blade 8 .

In order to have a better positioning effect, the outer walls of the two vertical portions 15 are arranged in close contact with the inner walls of the two connecting portions 5 on the presser foot plate 2 .

In order to further compress the blade 8 and prevent the blade 8 from shifting, an elastic body is arranged between the bottom plane of the presser handle 1 and the upper plane of the blade pressing plate 9 to compress the blade pressing plate 9 above the blade 9 .

The position of the elastic body can also be arranged between the blade pressing plate 9 and the blade 8 .

In this embodiment, when changing the blade 8, the screw 4 or the pin is pulled down, and then the presser handle 1 and the blade pressing plate 9 are pulled down successively to realize quick tool change.

Working principle of the utility model:

The sewing machine automatically trims the thread after sewing a section of stitches, and the thread hook 17 is driven by the driving source to hook the thread end 18, and then the thread end 18 is pulled under the clamping plate 19, and the thread end 18 is clamped between the thread clamping end 20 and the hook end 21 , the clamped thread end 18 forms a certain angle with the machine needle 22. When the sewing machine starts sewing for the first time, the first needle forms a thread loop in the sewing material, and moves together with the sewing material, and the clamped oblique thread end 18 passes through smoothly. The opening starting point 11 of the wire groove enters through the wire groove 6 and moves to the cutting edge to be cut off, thereby eliminating the process of manual thread trimming.

The needle thread 23 is blocked by the thread-stopping end 13 during the feeding process, so as to prevent the needle thread 23 from entering the thread slot 6 and being cut off to affect normal sewing. The needle thread blocked by the thread-stopping end 13 forms a normal stitch 25 through the thread-off slot 24 to lock the sewing material .

Wherein, the clamped thread end 18 is cut off at the center of the line, ensuring that a shorter thread end remains on the sewing material.

The above-described embodiment is only one of the preferred embodiments of the present utility model, and is not intended to limit the scope of implementation of the present utility model, so: all equivalent changes made according to the shape, structure and principle of the present utility model should be covered. Within the protection scope of the present utility model.

Claims (10)

1. A sewing machine removes the bird's nest and quickly changes the belt knife presser foot, comprising a presser foot handle and a presser foot plate, a central thread groove is arranged at the front portion of the presser foot plate, and the presser foot handle is hinged with two connecting parts on the presser foot plate, and is characterized in that : The presser foot plate at the rear end of the central wire groove is provided with a wire groove, the central wire groove is connected with the wire groove, and a blade groove is formed on the presser foot plate between the two connecting parts, and the end of the wire groove is located in the blade groove , the blade is arranged in the blade groove, and the cutting edge of the blade is located above the wire passing groove. 2. A sewing machine according to claim 1, wherein the fast tool change presser foot with a knife for removing the bird's nest is characterized in that: an elastic body is arranged between the bottom plane of the presser foot handle and the upper plane of the blade, and the elastic body pushes the blade further Compressed into the insert pocket. 3. A kind of sewing machine according to claim 1, wherein the fast tool change belt knife presser foot for bird's nest removal is characterized in that: a blade presser is arranged between the upper plane of the blade and the bottom plane of the presser foot handle, and the blade presser will The blade is pressed into the blade groove. 4. A sewing machine according to claim 3, wherein the fast knife changer with a knife presser foot for removing the bird's nest, is characterized in that: both ends of the horizontal plate of the blade press plate are bent upwards to form a vertical portion, corresponding to An opening is provided at the position of the blade, and a through hole convenient for the screw to pass is provided on the vertical part. 5. A sewing machine according to claim 4, characterized in that: the outer walls of the two vertical parts are closely attached to the inner walls of the two connecting parts on the presser foot plate. 6. A sewing machine according to claim 3, characterized in that: an elastic body is arranged between the upper plane of the blade pressing plate and the bottom plane of the presser handle, and the elastic body presses The blade pressing plate is above the blade to further compress the blade into the blade groove; Or: an elastic body is arranged between the bottom plane of the blade pressing plate and the upper plane of the blade, and the elastic body further compresses the blade in the blade groove. 7. A sewing machine according to claim 2 or 6, characterized in that: said elastic body is a spring or a sponge or a rubber sheet. 8. A sewing machine according to claim 1, characterized in that: the starting point of the thread passing groove is located on the side of the central thread groove of the presser foot plate, and the thread passing groove is from the starting point The oblique presser foot plate is set through the center of the thread, and its end is located at the center of the thread groove. 9 . A sewing machine according to claim 8 , a fast knife-changing presser foot with knife for bird's nest removal, characterized in that: a thread-stopping end is formed between the starting point of the thread passing groove and the central thread groove. 10. A sewing machine according to claim 1, characterized in that: said blade is provided with an opening, and said opening is provided with a V-shaped blade; Or: the blade is provided with an opening, and a straight blade is provided in the opening.