Linear threading auxiliary structure for sewing machine needle

Abstract

The utility model discloses a sewing machine needle straight line routing auxiliary structure which comprises a connecting block and two shaft seats installed on the outer wall of one side of the connecting block, a line pressing foot is arranged on one side of each shaft seat, and a U-shaped supporting head is integrally formed at one end of each line pressing foot. An elastic hinge shaft structure for deflection of the wire pressing foot is arranged between the U-shaped supporting head and the shaft seat, at least two rectangular cutting parts which are completely penetrated are arranged on the surface of the wire pressing foot, and a wire guide fin is mounted on one side of the bottom end of the wire pressing foot. The thread pressing foot can automatically adjust contact pressure according to the thickness and characteristics of fabric, so that stability in the sewing process is guaranteed, it is guaranteed that the fabric can stably pass through a sewing area, the problems that sewing seam allowance widths are different due to too large or too small pressure and the like are solved, and the sewing quality is improved. Or wrinkling, pleating, fabric damage and the like can be caused.

Description

Technical Field

[0001] The utility model relates to the technical field of sewing machine parts and components, in particular to a straight line routing auxiliary structure for a sewing machine needle. Background Art

[0002] The thread presser is an indispensable part of the sewing machine. Its main function is to ensure that the fabric can be stably pressed during the sewing process so that the sewing needle can accurately pass through the fabric. Its core functions include conducting and pressing the fabric, guiding the movement of the needle, and maintaining the consistency and stability of sewing. The thread presser consists of several main parts, including the presser foot, presser foot rod, and presser foot screw. The presser foot is the part that directly contacts the fabric. It is usually made of metal or plastic. Its bottom is designed with a flat surface or a groove to facilitate the fixation of the fabric. The presser foot rod transmits the pressure to the presser foot, and the presser foot screw is used to adjust the pressure to adapt to fabrics of different thicknesses and types. At present, the presser foot and the presser foot rod are connected in a hinged form during use. When in use, the presser foot is flipped down to make it horizontal. After the presser foot rod moves downward and makes the presser foot contact with the fabric, the presser foot and the fabric are tightly pressed under the pressure of the presser foot rod, resulting in excessive contact pressure between the presser foot and the fabric, that is, the pressure of the presser foot cannot be adjusted. During the sewing process, the thickness and characteristics of the fabrics are different. If the pressure of the presser foot is fixed and too large, the fabric cannot be smoothly transmitted under the presser foot or is over-fixed, which may cause uneven, wrinkled or wrinkled sewing lines. For thin or soft fabrics, excessive pressure will cause the fabric to be indented or leave marks, and may even damage the fiber structure of the fabric, affecting the final sewing effect. Utility Model Content

[0003] The purpose of the utility model is to provide a straight line auxiliary structure for a sewing machine needle, in which a presser foot is connected to a connecting block through an elastic hinge structure. When the presser foot is pressed on the fabric, the downward depth of the presser foot and the connecting block is proportional to the pressure on the fabric, and the appropriate contact pressure is controlled under the action of the elastic hinge structure to solve the problems raised in the above-mentioned background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a straight line routing auxiliary structure for a sewing machine needle, comprising a connecting block and two shaft seats installed on the outer wall of one side of the connecting block, a thread pressing foot is arranged on one side of the shaft seat, a U-shaped supporting head is integrally formed at one end of the thread pressing foot, an elastic hinge shaft structure for allowing the thread pressing foot to deflect is arranged between the U-shaped supporting head and the shaft seat, at least two completely penetrating rectangular cut-out portions are arranged on the surface of the thread pressing foot, and a wire fin is installed on one side of the bottom end of the thread pressing foot.

[0005] Preferably, a circular through hole is provided at one end of the surface of the connection block.

[0006] Preferably, the elastic hinge shaft structure includes a notch portion arranged on the back side of the U-shaped support head, and a hinge shaft fixed inside the two shaft seats, the U-shaped support head is mounted on the hinge shaft, and a torsion spring unit is installed on the surface of the hinge shaft, and the two ends of the torsion spring unit are respectively hinged to the bottom end of the connecting block and the inner wall of one side of the notch portion.

[0007] Preferably, three U-shaped support heads are provided, and the three U-shaped support heads are symmetrically structured with respect to the vertical center reference plane of the connecting block.

[0008] Preferably, one end of the presser foot is formed with a claw body through a rectangular cut-out portion.

[0009] Preferably, the wire pressing feet and the wire fins are both made of stainless steel.

[0010] Compared with the prior art, the beneficial effect of the utility model is that the straight line auxiliary structure for the sewing machine needle is provided with structures that cooperate with each other, such as a thread pressing foot and an elastic hinge shaft structure. After the thread pressing foot contacts the fabric, the elastic hinge shaft structure is deformed, and the deformation amount is proportional to the downward depth of the thread pressing foot and the contact pressure of the fabric, so that the thread pressing foot can automatically adjust the contact pressure according to the thickness and characteristics of the fabric, thereby ensuring stability during the sewing process, ensuring that the fabric can pass through the sewing area smoothly, and avoiding problems such as different tolerances of the sewing seam stop caused by excessive or insufficient pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0012] Figure 2 The three-dimensional structure of the utility model is shown in FIG. Figure 1 ;

[0013] Figure 3 The three-dimensional structure of the utility model is shown in FIG. Figure 2 ;

[0014] Figure 4 The three-dimensional structure of the utility model is shown in FIG. Figure 3 ;

[0015] Figure 5 The three-dimensional structure of the utility model is shown in FIG. Figure 4 ;

[0016] In the figure: 1, connecting block; 2, shaft seat; 3, wire pressing foot; 301, rectangular cut-out portion; 302, claw body; 4, U-shaped support head; 401, notch portion; 5, torsion spring monomer; 6, hinge shaft; 7, wire fin. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0018] See also Figure 1-5 The utility model provides an embodiment: a straight line auxiliary structure for a sewing machine needle, comprising a connecting block 1 and two shaft seats 2 installed on the outer wall of one side of the connecting block 1, a thread pressing foot 3 is arranged on one side of the shaft seat 2, and a U-shaped support head 4 is integrally formed at one end of the thread pressing foot 3, and three U-shaped support heads 4 are arranged, and the three U-shaped support heads 4 are symmetrically structured with respect to the vertical center reference plane of the connecting block 1;

[0019] An elastic hinge structure is provided between the U-shaped support head 4 and the shaft seat 2 for the presser foot 3 to deflect. The surface of the presser foot 3 is provided with at least two completely penetrating rectangular cutouts 301. One end of the presser foot 3 is formed with a claw body 302 through the rectangular cutout 301. For thin fabric materials, the presser foot 3 can ensure that the fabric is always kept flat during sewing, and the path of the needle and thread passing through the fabric is always accurate, thereby improving the accuracy of sewing. A guide fin 7 is installed on one side of the bottom end of the presser foot 3;

[0020] A circular through hole is provided at one end of the surface of the connecting block 1, and the elastic hinge shaft structure includes a notch portion 401 provided on the back of the U-shaped support head 4, and a hinge shaft 6 fixed inside the two shaft seats 2. The U-shaped support head 4 is sleeved on the hinge shaft 6, and a torsion spring unit 5 is installed on the surface of the hinge shaft 6. The two ends of the torsion spring unit 5 are respectively hinged to the bottom end of the connecting block 1 and the inner wall of one side of the notch portion 401. When the pressing foot 3 moves down and contacts the fabric, the end of the pressing foot 3 with the U-shaped support head 4 deflects with the hinge shaft 6 as the axis. Since the two ends of the torsion spring unit 5 are located at the bottom end of the connecting block 1 and the inner wall of one side of the notch portion 401, the torsion spring unit 5 is twisted and deformed, and the greater the contact pressure of the pressing foot 3 on the fabric, the greater the deformation of the torsion spring unit 5. Compared with the traditional fixed pressure design, the elastic hinge shaft structure is more flexible and convenient in operation. The operator does not need to adjust the pressure frequently. The pressure can be adaptively adjusted through the design of the presser itself, saving adjustment time.

[0021] The wire pressing foot 3 and the wire fin 7 are both made of stainless steel. Stainless steel usually has high strength and hardness, and can withstand high pressure and wear, ensuring that the wire pressing foot 3 and the wire fin 7 maintain stable performance during long-term use.

[0022] The wire fin 7 can form an additional support under the presser foot 3, so that the fabric can be pressed more stably during the sewing process, especially for soft or easily deformed fabrics, the wire fin 7 can provide additional support, and through the support of the wire fin 7, the presser foot 3 can more accurately control the movement of the fabric and suppress the lifting of the fabric, ensuring that the sewing needle and thread pass through the fabric at the correct position.

[0023] When the embodiment of the present application is in use, the staff first installs the connecting block 1 in the structure onto the thread pressing rod of the sewing machine needle through a bolt connection. When the staff controls the thread pressing rod to drive the connecting block 1, the thread pressing foot 3 and other components downward and contact the fabric, the pressure is transmitted to the thread pressing foot 3 through the presser foot rod and the connecting block 1, so that it can effectively press the fabric. During the sewing process, the rectangular cut-out portion 301 allows the needle to move up and down and perform sewing operations, and the guide fin 7 plays a role in guiding the position of the fabric, so that the needle can accurately move the fabric along the predetermined direction when sewing. It moves in a straight line. When the fabric is thick and requires a larger contact pressure to ensure its stability, the presser foot rod, the connecting block 1, and the presser foot 3 move downward. After the presser foot 3 contacts the fabric, the elastic hinge structure is deformed, and the deformation amount is proportional to the downward depth of the presser foot 3 and the contact pressure of the fabric, so that the presser foot 3 can automatically adjust the contact pressure according to the thickness and characteristics of the fabric, thereby ensuring stability during the sewing process and ensuring that the fabric can pass through the sewing area smoothly, avoiding problems such as uneven tolerance of the sewing seam stop caused by excessive or insufficient pressure.

[0024] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A straight line auxiliary structure for a sewing machine needle, characterized in that: The invention comprises a connecting block (1) and two shaft seats (2) installed on the outer wall of one side of the connecting block (1); a wire pressing foot (3) is arranged on one side of the shaft seat (2); a U-shaped support head (4) is integrally formed at one end of the wire pressing foot (3); an elastic hinge structure for allowing the wire pressing foot (3) to deflect is arranged between the U-shaped support head (4) and the shaft seat (2); at least two completely penetrating rectangular cutouts (301) are arranged on the surface of the wire pressing foot (3); and a conductor fin (7) is installed on one side of the bottom end of the wire pressing foot (3).

2. The straight line auxiliary structure for sewing machine needle according to claim 1, characterized in that: One end of the surface of the connection block (1) is provided with a circular through hole.

3. The straight line auxiliary structure for sewing machine needle according to claim 1, characterized in that: The elastic hinge structure comprises a notch portion (401) arranged on the back of the U-shaped support head (4), and a hinge shaft (6) fixed inside the two shaft seats (2); the U-shaped support head (4) is sleeved on the hinge shaft (6); a torsion spring unit (5) is installed on the surface of the hinge shaft (6); the two ends of the torsion spring unit (5) are respectively hinged to the bottom end of the connecting block (1) and the inner wall of one side of the notch portion (401).

4. The straight line auxiliary structure for sewing machine needle according to claim 1, characterized in that: Three U-shaped support heads (4) are provided, and the three U-shaped support heads (4) are symmetrically structured with respect to the vertical center reference plane of the connection block (1).

5. The straight line auxiliary structure for sewing machine needle according to claim 1, characterized in that: One end of the presser foot (3) is formed with a claw body (302) through a rectangular cut-out portion (301).

6. The straight line auxiliary structure for sewing machine needle according to claim 1, characterized in that: The wire pressing foot (3) and the wire fin (7) are both made of stainless steel.

Images