Presser foot of sewing machine

Abstract

The utility model provides a presser foot of a sewing machine, and belongs to the technical field of sewing equipment. The presser foot comprises a presser foot support and a presser foot plate arranged at the end of the presser foot support, and further comprises a presser foot plate seat rotationally connected with the end of the presser foot support through an axial screw, the presser foot plate seat is of an inverted U-shaped structure, an axial hole for the axial screw to penetrate is formed in the middle of the presser foot plate seat, and presser foot positioning pins are fixed to the two ends of the presser foot plate seat. Fastening screws are connected to the two ends of the upper portion of the presser foot plate in a screwed mode, presser foot spring plates are arranged on the fastening screws in a penetrating mode, fastening holes formed in the presser foot positioning pins in a sleeving mode are formed in the ends of the presser foot spring plates, and limiting balls with the diameter larger than that of the fastening holes are fixed to the bottoms of the presser foot positioning pins. The two ends of the upper portion of the presser foot plate are each provided with a rotating groove used for limiting rotation of the bottom of the ball. The presser foot adjusting device has the advantages of simple structure, convenience in self-adaptive adjustment of the presser foot, wide application range and the like.

Description

Technical Field

[0001] The utility model belongs to the technical field of sewing equipment, and particularly refers to a presser foot of a sewing machine. Background Art

[0002] Due to the diverse clothing styles in modern society, there are more and more sewing requirements during the sewing process of clothing. For example, the situation of sewing with height differences is also increasing. Although the traditional sewing machine presser foot can be used for slight height differences, it can no longer meet the current modern sewing needs. When the height difference is too large, it will cause the sewing needle to hit the presser foot, the cutter to cut the presser foot, and thread breakage.

[0003] To solve the above problems, CN109487448B discloses an adaptive high-low sewing presser foot device. The technical solution includes a support frame and a presser foot. The presser foot includes a first presser foot plate and a second presser foot plate that are independently separated from each other. A through groove is formed between the first presser foot plate and the second presser foot plate. The first presser foot plate is fixedly connected to the support frame through a presser foot fixing seat. The second presser foot plate is connected to the support frame through a lifting mechanism, and the lifting mechanism can drive the second presser foot plate to rise and fall. Although the above technical solution realizes the switching of two different high-low presser feet through the lifting mechanism, for sewing, not only the front-back high-low presser foot requirements are needed. For various sewing requirements, such as left-right height differences, left-right inclined height differences, and front-back inclined height differences, they cannot be satisfied, and the adjustment limitations are relatively large. Summary of the Invention

[0004] The purpose of the utility model is to provide a presser foot of a sewing machine, which can effectively solve the problem of inconsistent left-right height and front-back height of the fabric to be sewn.

[0005] The purpose of the utility model is realized as follows:

[0006] A presser foot of a sewing machine includes a presser foot support and a presser foot plate arranged at the end of the presser foot support. The end of the presser foot support is rotatably connected to a presser foot plate seat through an axially-positioned screw. The presser foot plate seat has an inverted "U" - shaped structure. An axially-positioned hole for the axially-positioned screw to penetrate is opened in the middle of the presser foot plate seat. Presser foot positioning pins are fixed at both ends of the presser foot plate seat. Tightening screws are screwed at both ends above the presser foot plate, and a presser foot spring plate is penetrated through each tightening screw. A tightening hole sleeved on the presser foot positioning pin is opened at the end of the presser foot spring plate. A limiting ball with a diameter larger than the tightening hole is fixed at the bottom of the presser foot positioning pin. Rotating grooves for the bottom of the limiting ball to rotate are arranged at both ends above the presser foot plate.

[0007] The utility model is further arranged such that a spring is penetrated through the presser foot plate, and one end of the spring extending out of the presser foot plate is provided with a spring conical surface that matches the protruding part on the end face of the presser foot support.

[0008] The utility model is further configured such that pin holes in the same horizontal direction are provided at both ends of the presser foot base, and the top of the presser foot positioning pin is fixed to the pin holes by riveting.

[0009] The utility model is further configured such that a presser foot pad is provided on the lower end surface of the presser foot plate.

[0010] The utility model is further configured such that the presser foot pad is made of resin or a tooth surface integrally processed on the bottom surface of the presser foot plate.

[0011] The utility model is further configured such that the presser foot spring plate is in a "Z" shape.

[0012] The utility model is further configured such that a contact conical surface abutting against the lower hole edge of the fastening hole is provided at the upper end of the limit ball.

[0013] The prominent and beneficial technical effects of the utility model compared with the prior art are as follows:

[0014] 1. For the presser foot provided by the utility model, when encountering uneven fabric height left and right, the presser foot plate will cause the limit ball to rotate along the rotation groove during contact, realizing the adaptive adjustment of the left and right height of the presser foot plate; when encountering uneven height front and back, the presser foot base will adaptively rotate along the axis of the axial screw, realizing the adaptive adjustment of the front and back height, and having a wider adjustment range and better applicability.

[0015] 2. The spring further provided on the presser foot plate of the utility model and the spring conical surface provided on the presser foot bracket for the spring to cooperate, enabling it to provide an automatic reset function after the presser foot rotates.

[0016] 3. The fastening screw further provided by the utility model adopts a top-riveting form, facilitating the threading of the end of the presser foot spring plate and preventing the end of the presser foot spring plate from falling off from the top.

[0017] 4. The presser foot pad further provided by the utility model can achieve a good anti-slip effect when pressing the fabric.

[0018] 5. The contact conical surface above the limit ball provided by the utility model can facilitate the abutment against the inner hole of the fastening hole at the end of the presser foot spring plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic structural diagram of the utility model;

[0020] Figure 2 is an exploded schematic diagram of the utility model;

[0021] Figure 3It is a schematic structural diagram of the normal state of the presser foot of the present utility model;

[0022] Figure 4 It is a schematic structural diagram of the rotation of the presser foot of the present utility model Figure 1 ;

[0023] Figure 5 It is a schematic structural diagram of the rotation of the presser foot of the present utility model Figure 2 ;

[0024] Figure 6 It is a schematic structural diagram of the spring conical surface of the present utility model;

[0025] Figure 7 It is the present utility model Figure 2 An enlarged schematic diagram of the partial A;

[0026] Reference numerals:

[0027] 1 - Presser foot bracket; 10 - Spring conical surface; 2 - Presser foot plate; 20 - Rotation groove; 3 - Axial position screw; 4 - Presser foot plate seat; 40 - Axial position hole; 41 - Pin hole;

[0028] 5 - Presser foot positioning pin; 50 - Limiting ball; 6 - Fastening screw; 7 - Presser foot spring plate; 70 - Fastening hole; 71 - Abutting conical surface; 8 - Spring; 9 - Presser foot pad. Specific embodiments

[0029] The following further describes the present utility model with specific embodiments in conjunction with the attached drawings. See Figure 1 — Figure 7 :

[0030] A presser foot of a sewing machine includes a presser foot bracket 1 and a presser foot plate 2 provided at the end of the presser foot bracket 1. The end of the presser foot bracket 1 is rotatably connected to a presser foot plate seat 4 through an axial position screw 3. The presser foot plate seat 4 has an inverted "U" - shaped structure. An axial position hole 40 for the axial position screw 3 to penetrate is provided in the middle of the presser foot plate seat 4. Presser foot positioning pins 5 are fixed at both ends of the presser foot plate seat 4. Fastening screws 6 are screwed at both ends above the presser foot plate 2, and the fastening screws 6 are all provided with presser foot spring plates 7. Fastening holes 70 sleeved on the presser foot positioning pins 5 are provided at the ends of the presser foot spring plates 7. A limiting ball 50 with a diameter larger than the fastening hole 70 is fixed at the bottom of the presser foot positioning pin 5. Rotation grooves 20 for the bottom of the limiting ball 50 to rotate are provided at both ends above the presser foot plate 2.

[0031] In the case of normal horizontal fabric, the presser foot plate normally presses down on the fabric and will not deflect left - right or front - back.

[0032] When sewing fabrics with uneven left and right heights, the presser foot plate 2 rotates left and right around the center of the bottom limit ball 50 of the presser foot positioning pin 5, so as to press the fabrics with uneven left and right heights.

[0033] When sewing fabrics with uneven front and back heights, the middle part of the presser foot plate seat 4 rotates around the axial direction of the shaft position screw, so as to press the fabrics with uneven heights.

[0034] With the above-mentioned adaptive adjustment method, since it can effectively respond in both the front-back and left-right directions, it has a wider application range.

[0035] Preferably, a spring 8 is inserted through the presser foot plate 2, and one end of the spring 8 extending out of the presser foot plate 2 is provided with a spring cone surface 10 that matches the extending part on the end face of the presser foot bracket 1.

[0036] In the above structure, the spring is twisted due to the rotation of the presser foot plate seat, thereby driving the spring to twist. During the twisting process of the spring, it is always within the spring cone surface 10 of the presser foot bracket 1, and after twisting, the presser foot lifts up, causing the presser foot plate to reset with the presser foot plate seat again. The reset method is that the spring cone surface and the end of the spring remain in contact, that is, the reset work in the twisted state.

[0037] Preferably, two ends of the presser foot plate seat 4 are both provided with pin holes 41 in the same horizontal direction, and the top of the fastening screw 6 is fixed to the pin holes 41 by riveting.

[0038] During the installation process, the presser foot positioning pin 5 is installed on the pin holes 41 and riveted. It is worth mentioning that before assembling the pin holes 41, the fastening hole at the end of the presser foot spring plate 7 is sleeved on the presser foot positioning pin 5 to complete the installation of the presser foot positioning pin.

[0039] Preferably, a presser foot pad 9 is arranged on the lower end surface of the presser foot plate 2.

[0040] Preferably, the presser foot pad 9 is made of resin or a tooth surface integrally processed on the bottom surface of the presser foot plate 2.

[0041] In the above structure, the presser foot pad 9 can play a good anti-slip effect when pressing the fabric.

[0042] Preferably, the presser foot spring plate 7 is in a "Z" shape. The presser foot spring plate in a "Z" shape makes a certain height difference between the two ends of the presser foot spring plate, thereby increasing the deformation range generated during rotation and facilitating the left-right horizontal reset when lifting the presser foot plate.

[0043] Preferably, an abutting conical surface 71 that abuts against the lower hole edge of the fastening hole 70 is provided at the upper end of the limiting ball 50. Since the upper end of the limiting ball needs to abut against the fastening hole 70, when the pressing foot plate is rotated, the abutting conical surface can use a flat side wall to make the abutting more stable.

[0044] The above embodiments are only the preferred embodiments of the present invention, and do not limit the protection scope of the present invention accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present invention should be covered within the protection scope of the present invention.

Claims

1. A presser foot for a sewing machine, comprising a presser foot support (1) and a presser foot plate (2) arranged at the end of the presser foot support (1), characterized in that: The invention comprises a presser foot base (4) rotatably connected to the end of a presser foot bracket (1) through an axial screw (3), and the presser foot base (4) is an inverted "U"-shaped structure. An axial hole (40) for the axial screw (3) to penetrate is provided in the middle of the presser foot base (4), presser foot positioning pins (5) are fixed at both ends of the presser foot base (4), fastening screws (6) are screwed at both ends of the upper part of the presser foot plate (2), and the fastening screws (6) are penetrated by a presser foot spring plate (7), and a fastening hole (70) sleeved on the presser foot positioning pin (5) is provided at the end of the presser foot spring plate (7), a limiting ball (50) having a diameter larger than the fastening hole (70) is fixed at the bottom of the presser foot positioning pin (5), and a rotating groove (20) for rotating the bottom of the limiting ball (50) is provided at both ends of the upper part of the presser foot plate (2).

2. A presser foot for a sewing machine according to claim 1, characterized in that: The presser foot plate (2) is provided with a spring (8), and the spring (8) extends out of one end of the presser foot plate (2). The end surface of the presser foot bracket (1) is provided with a spring cone surface (10) that matches the extended portion.

3. A presser foot for a sewing machine according to claim 1 or 2, characterized in that: Both ends of the presser foot seat (4) are provided with pin holes (41) located in the same horizontal direction, and the top of the presser foot positioning pin (5) is fixed to the pin hole (41) in a riveted manner.

4. A presser foot for a sewing machine according to claim 1 or 2, characterized in that: The lower end surface of the presser foot plate (2) is provided with a presser foot pad (9).

5. A presser foot for a sewing machine according to claim 4, characterized in that: The presser foot pad (9) is made of resin or is a toothed surface integrally processed on the bottom surface of the presser foot plate (2).

6. The presser foot of a sewing machine according to claim 1, characterized in that: The pressure foot spring plate (7) is in a "Z" shape.

7. A presser foot for a sewing machine according to claim 1, characterized in that: The upper end of the limiting ball (50) is provided with a contact conical surface (71) that contacts the lower edge of the fastening hole (70).

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