Middle presser foot and sewing equipment
By opening a wire groove on the bottom surface of the presser head of the medium presser foot, the surface wire can enter the pinhole through the wire groove, which solves the problem of the surface wire being pressed or squeezed after it passes out of the top surface of the fabric, and achieves low tension sewing and a smoother thread collection process.
Patent Information
- Application Number
- CN202420131152.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-18
- Publication Date
- 2025-04-11
- Estimated Expiration
- 2034-01-18
AI Technical Summary
In sewing equipment such as template machines, the surface thread may be squeezed or pressed against the machine needle hole wall of the medium presser foot after it is penetrated from the top surface of the fabric, resulting in high tension of the surface thread, affecting the smoothness of the thread collection, and may have problems such as broken threads, throwing points, leaking velvet, and wrinkles after the fabric seam.
A medium presser foot is designed, and the presser head is arranged through the machine pinhole in the up and down direction, and a wire groove is opened on the bottom surface of the presser head. At least part of the structure of the wire groove is arranged and communicated with the machine pinhole in the preset feeding direction from front to back to ensure that the surface line can enter the machine pinhole through the wire groove to avoid being pressed or squeezed.
By setting the wire groove, the surface thread tension is reduced, the smoothness of thread collection is improved, the risks of problems such as thread breakage, throwing points, leaking velvet, and wrinkles after fabric seams are reduced, and the sewing effect is improved.
Smart Images
Figure CN222744539U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of sewing equipment, in particular to a middle presser foot and sewing equipment. Background Art
[0002] In sewing equipment such as template machines, after the fabric advances a certain distance, when the thread is tightened upward through the needle plate and the fabric, the upper thread also advances a certain distance with the fabric. After the upper thread passes through the top surface of the fabric, it may be squeezed against the wall of the needle hole of the middle presser foot or pressed by the bottom surface of the middle presser foot, resulting in a large tension of the upper thread, affecting the smoothness of the thread taking-up rod. After sewing, there may be problems such as thread breakage, dropped points, velvet leakage, and fabric wrinkles after sewing, which affect the sewing effect.
[0003] Therefore, how to improve the smoothness of line reeling is a technical problem that those skilled in the art currently need to solve. Utility Model Content
[0004] In view of this, the purpose of the utility model is to provide a middle presser foot and sewing equipment, which can improve the smoothness of thread collection.
[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:
[0006] A middle presser foot comprises a presser foot arm and a presser foot head fixed at the bottom end of the presser foot arm, wherein the presser foot head is provided with a machine needle hole penetrating in the up-down direction, a wire groove is provided on the bottom surface of the presser foot head, and at least part of the structure of the wire groove and the machine needle hole are arranged in sequence from front to back in a preset feeding direction and are connected, wherein the preset feeding direction is the forward direction of the cloth under the middle presser foot.
[0007] Preferably, in the preset feeding direction, the top surface of the guide wire trough gradually rises backwards.
[0008] Preferably, the top surface of the guide wire trough is an arc segment with a middle portion convex upward in a cross section perpendicular to the preset feeding direction.
[0009] Preferably, the wire trough is a symmetrical structure relative to a preset plane, and the preset plane is parallel to the preset feeding direction and the up-down direction.
[0010] Preferably, in the preset feeding direction, the wire guide is located as a whole in front of the center line of the needle hole.
[0011] Preferably, at any two positions of the wire groove in the up-down direction, the circumferential spacing of the groove walls on the lower side is not less than the circumferential spacing of the groove walls on the upper side.
[0012] Preferably, the two opposite groove sides of the wire groove located in the lower half are planes parallel to the up and down directions.
[0013] Preferably, the top opening of the needle hole is located in the middle of the top surface of the presser foot head; the bottom end of the presser foot arm is fixed to the edge of the top surface of the presser foot head and in the preset feeding direction, the presser foot arm is located in front of the needle hole.
[0014] Preferably, the presser foot head includes a top plate and a presser foot base fixed under the top plate, the presser foot base is a cylindrical structure and the center line of the circle extends in the up-down direction; the center line of the needle hole is colinear with the center line of the cylindrical structure; the presser foot base and the top plate are provided with a through hole connected in the up-down direction to serve as the needle hole.
[0015] A sewing device comprises the above-mentioned middle presser foot and also comprises a pinhole plate arranged below the middle presser foot, and cloth can move on the pinhole plate along the preset feeding direction.
[0016] The utility model provides a middle presser foot, comprising a presser foot arm and a presser foot head fixed at the bottom end of the presser foot arm, the presser foot head is provided with a machine needle hole along the up and down directions, a wire groove is provided on the bottom surface of the presser foot head, at least part of the structure of the wire groove and the machine needle hole are arranged in sequence from front to back in a preset feeding direction and are connected, wherein the preset feeding direction is the forward direction of the cloth under the middle presser foot.
[0017] When the thread is tightened upward through the needle hole plate and the fabric, the position where the upper thread passes through the top surface of the fabric moves forward along the preset feeding direction with the fabric. However, due to the setting of the wire guide, this position on the upper thread can enter the needle hole through the wire guide. Based on the avoidance function of the wire guide, the position where the upper thread passes through the top surface of the fabric is prevented from being pressed by the bottom surface of the middle presser foot or squeezed by the wall of the needle hole, which can reduce the tension of the upper thread, improve the smoothness of the thread collection, achieve low-tension sewing, improve the flatness of the fabric, reduce the risks of thread breakage, cast points, lint leakage, fabric wrinkles after sewing, and so on, and can improve the sewing effect. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.
[0019] Figure 1 It is a structural schematic diagram of a specific embodiment 1 of the middle presser foot provided by the utility model;
[0020] Figure 2 A side view of a specific embodiment 1 of the middle presser foot provided by the utility model;
[0021] Figure 3 It is a front view of a specific embodiment 1 of the middle presser foot provided by the utility model;
[0022] Figure 4 It is a front view of the first specific embodiment of the middle presser foot provided by the utility model when the upper thread is passed during the thread collection;
[0023] Figure 5 for Figure 4 A cross-sectional view of the presser foot;
[0024] Figure 6 It is a front view of a second specific embodiment of the middle presser foot provided by the utility model;
[0025] Figure 7 It is a side view of the third specific embodiment of the middle presser foot provided by the utility model.
[0026] Reference numerals:
[0027] Presser foot arm 1;
[0028] Presser foot head 2, top plate 21, presser foot base 22, needle hole 23, center line 231, guide wire groove 24, groove side surface 241, groove top surface 242;
[0029] Pinhole plate 3;
[0030] Noodles 4;
[0031] Fabric 5;
[0032] Preset feeding direction X. DETAILED DESCRIPTION
[0033] 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. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. 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.
[0034] The core of the utility model is to provide a middle presser foot and sewing equipment, which can improve the smoothness of thread collection.
[0035] For a specific embodiment of the middle presser foot provided by the utility model, please refer to Figures 1 to 5, including a presser foot arm 1 and a presser foot head 2 fixed to the bottom end of the presser foot arm 1. The presser foot head 2 is provided with a needle hole 23 in the up-down direction, and a wire groove 24 is provided on the bottom surface of the presser foot head 2. At least part of the structure of the wire groove 24 and the needle hole 23 are arranged and connected in sequence from front to back in the preset feeding direction X. The preset feeding direction X is the forward direction of the cloth 5 under the middle presser foot. In addition, unless otherwise specified, the circumferential direction is based on the center line 231 of the needle hole 23 extending in the up-down direction.
[0036] like Figure 4 and Figure 5 As shown, in the present embodiment, when the suture thread is tightened upward through the needle hole plate 3 and the cloth 5, although the position where the upper thread 4 passes through the top surface of the cloth 5 moves forward along the preset feeding direction X with the cloth 5, due to the setting of the wire groove 24, this position on the upper thread 4 can enter the needle hole 23 through the wire groove 24. Based on the avoidance effect of the wire groove, the position where the upper thread 4 passes through the top surface of the cloth 5 can be prevented from being pressed by the bottom surface of the middle presser foot or squeezed by the hole wall of the needle hole 23, which can reduce the tension of the upper thread 4, make the thread take-up rod reel in the thread more smoothly, realize low-tension sewing, improve the flatness of the cloth 5, reduce the risks of thread breakage, drop points, velvet leakage, and wrinkles of the cloth 5 after sewing, and improve the sewing effect.
[0037] Furthermore, if Figure 5 As shown, the groove wall of the wire groove 24 includes two opposite groove side surfaces 241 located in the lower half and a groove top surface 242 located in the upper half and connected to the top of the two groove side surfaces 241. In the preset feeding direction X, the groove top surface 242 of the wire groove 24 gradually rises backward, which is adapted to the inclined direction of the upper thread 4 entering the needle hole 23 through the wire groove 24, and can reduce the extrusion and interference of the groove top surface 242 on the upper thread 4. Of course, in other embodiments, the groove top surface 242 can also be parallel to the preset feeding direction X.
[0038] Furthermore, if Figure 2 As shown, the groove top surface 242 of the wire groove 24 is an arc segment with a middle portion convex upward in a cross section perpendicular to the preset feeding direction X, which can reduce the angular structure in the wire groove 24 and reduce the resistance when the surface wire 4 can move freely in the wire groove 24. Of course, in other embodiments, the groove top surface 242 of the wire groove 24 can also be a plane or a sharp-angled surface.
[0039] Furthermore, if Figure 2 As shown, the wire groove 24 is a symmetrical structure relative to a preset plane, and the preset plane is parallel to the preset feeding direction X and the up-down direction, which can further reduce the interference and influence of the shape of the wire groove 24 on the plane wire 4.
[0040] Furthermore, if Figure 3As shown, in the preset feeding direction X, the guide groove 24 is located in front of the center line 231 of the needle hole 23. That is to say, in the circumferential direction, the angle of the guide groove 24 around the center line 231 of the needle hole 23 is less than 180°. Figure 5 In this orientation, the preset feeding direction X is to the left, and each position of the guide groove 24 is located on the left side of the center line 231 of the needle hole 23, which can ensure that the bottom surface of the presser foot 2 has a large enough area for pressing the cloth.
[0041] Furthermore, if Figure 2 As shown, at any two positions of the wire groove 24 in the up-down direction, the circumferential spacing of the groove wall located at the lower side is not less than the circumferential spacing of the groove wall located at the upper side, which can prevent the groove wall of the wire groove 24 from affecting the falling of the surface thread 4 in the wire groove 24. Specifically, the two opposite groove side surfaces 241 of the wire groove 24 located in the lower half are planes parallel to the up-down direction. In the lower half of the wire groove 24, the circumferential spacing of each position in the up-down direction is the same, which can reduce the difficulty of processing.
[0042] Furthermore, if Figure 3 As shown, the top opening of the needle hole 23 is located in the middle of the top surface of the presser foot head 2. The bottom end of the presser foot arm 1 is fixed to the edge of the top surface of the presser foot head 2 and in the preset feeding direction X, the presser foot arm 1 is located in front of the needle hole 23. At this time, the presser foot arm 1 and the guide groove 24 are located on the same side of the needle hole 23, which is convenient for positioning the guide groove 24 during processing. Of course, in other embodiments, according to the preset feeding direction X, such as Figure 6 As shown, the positions of the presser foot arm 1 and the guide groove 24 are at an angle of 90° in the circumferential direction, or as shown in FIG. Figure 7 As shown, the presser foot arm 1 and the guide wire groove 24 are respectively located on both sides of the needle hole 23 in the preset feeding direction X.
[0043] Furthermore, if Figure 1 As shown, the presser foot head 2 includes a top plate 21 and a presser foot base 22 fixed below the top plate 21, and the presser foot base 22 is a cylindrical structure with a center line extending in the up-down direction. The center line 231 of the needle hole 23 is colinear with the center line of the cylindrical structure. A through hole connected in the up-down direction is provided on the presser foot base 22 and the top plate 21 to serve as the needle hole 23. Based on the position of the center line, the positioning of the wire groove 24 during processing is further facilitated. Of course, in other embodiments, the presser foot base 22 may also be a prismatic structure.
[0044] In addition to the above-mentioned middle presser foot, the utility model also provides a sewing device, which can be specifically a template machine. The sewing device includes a middle presser foot, which can be specifically the middle presser foot provided in any of the above embodiments, and the beneficial effects can be correspondingly referred to the above embodiments. In addition, the sewing device also includes a pinhole plate 3 arranged below the middle presser foot, and the cloth 5 can move along the preset feeding direction X on the pinhole plate 3, and the presser foot arm 1 of the middle presser foot is installed on the presser foot rod. Please refer to the prior art for the structure of other parts of the sewing device, which will not be repeated herein.
[0045] It should be noted that when an element is referred to as "fixed" to another element, it may be directly on the other element or there may be an element in the middle. When an element is considered to be "connected" to another element, it may be directly connected to the other element or there may be an element in the middle at the same time. In addition, in the description of the present utility model, unless otherwise specified, "multiple", "multiple roots", and "multiple groups" mean two or more.
[0046] The terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features.
[0047] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.
[0048] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.
[0049] The above is a detailed introduction to the presser foot and sewing equipment provided by the utility model. This article uses specific examples to illustrate the principle and implementation method of the utility model. The description of the above embodiments is only used to help understand the method and core idea of the utility model. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the utility model, the utility model can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the utility model.
Claims
1. A middle presser foot, characterized in that: The invention comprises a presser foot arm (1) and a presser foot head (2) fixed at the bottom end of the presser foot arm (1), wherein the presser foot head (2) is provided with a needle hole (23) penetrating in the up-down direction, and a guide wire groove (24) is provided on the bottom surface of the presser foot head (2), and at least a part of the structure of the guide wire groove (24) and the needle hole (23) are arranged and connected in sequence from front to back in a preset feeding direction (X), so that when the sewing thread is tightened upward through the needle hole plate (3) and the cloth (5), the position where the upper thread (4) passes through the top surface of the cloth (5) can enter the needle hole (23) through the guide wire groove (24), wherein the preset feeding direction (X) is the forward direction of the cloth (5) below the middle presser foot.
2. The intermediate presser foot according to claim 1, characterized in that: In the preset feeding direction (X), the groove top surface (242) of the wire groove (24) gradually rises backwards.
3. The intermediate presser foot according to claim 1, characterized in that: The groove top surface (242) of the guide groove (24) is an arc segment with a middle portion convex upward in a cross section perpendicular to the preset feeding direction (X).
4. The intermediate presser foot according to claim 1, characterized in that: The wire groove (24) is a symmetrical structure relative to a preset plane, and the preset plane is parallel to the preset feeding direction (X) and the up-down direction.
5. The intermediate presser foot according to claim 1, characterized in that: In the preset feeding direction (X), the guide wire groove (24) is located as a whole in front of the center line (231) of the needle hole (23).
6. The intermediate presser foot according to any one of claims 1 to 5, characterized in that: At any two positions of the conductor groove (24) in the up-down direction, the circumferential spacing of the groove wall located at the lower side is not less than the circumferential spacing of the groove wall located at the upper side.
7. The intermediate presser foot according to claim 6, characterized in that: The two opposite groove side surfaces (241) of the wire groove (24) located at the lower half are planes parallel to the up and down directions.
8. The intermediate presser foot according to any one of claims 1 to 5, characterized in that: The top opening of the needle hole (23) is located in the middle of the top surface of the presser foot head (2); the bottom end of the presser foot arm (1) is fixed to the edge of the top surface of the presser foot head (2) and in the preset feeding direction (X), the presser foot arm (1) is located in front of the needle hole (23).
9. The intermediate presser foot according to any one of claims 1 to 5, characterized in that: The presser foot head (2) comprises a top plate (21) and a presser foot base (22) fixed below the top plate (21); the presser foot base (22) is a cylindrical structure with a center line extending in the up-down direction; the center line (231) of the needle hole (23) is colinear with the center line of the cylindrical structure; a through hole connected in the up-down direction is provided on the presser foot base (22) and the top plate (21) to serve as the needle hole (23).
10. A sewing device, characterized in that: The invention comprises the middle presser foot as claimed in any one of claims 1 to 9, and further comprises a pinhole plate (3) arranged below the middle presser foot, and the cloth (5) can move on the pinhole plate (3) along the preset feeding direction (X).