Presser foot structure

Abstract

The utility model provides a presser foot structure which comprises a presser foot body, a presser foot plate, a guide column, a pressing plate spring and a bolt. The presser foot main body comprises two cloth pressing presser feet which are arranged at an interval, the presser foot plate is arranged between the two cloth pressing presser feet, and the height of the lower surface of the presser foot plate is higher than that of the lower surfaces of the cloth pressing presser feet; a first through hole is formed in the presser foot main body, a thread part of the bolt is arranged in the first through hole, and a head part of the bolt is arranged outside the first through hole; one end of the guide column is fixed to the upper surface of the presser foot plate, the other end of the guide column is connected with the threaded part of the bolt through internal threads, and the guide column can reciprocate in the axis direction of the first through hole. The pressing plate spring is sleeved on the guide column, and the diameter of the pressing plate spring is larger than that of the first through hole. The guide column is fixed on the presser foot main body through the bolt, and the guide column does not need to be fixed on the presser foot main body through a clamp spring any more, so that the vertical stroke of the guide column and the presser foot plate is larger, and the guide column and the bolt are convenient to assemble and disassemble.

Description

Technical Field

[0001] The utility model relates to the technical field of sewing machines, in particular to a presser foot structure. Background Art

[0002] In the process of making clothes, sometimes it is necessary to sew a rolling strip (rolling strip can be called a sticker strip) on the cloth to form a pattern or text. In the process of sewing the rolling strip, a sewing machine is required, and the sewing machine includes a presser foot structure, which can fix the rolling strip and the cloth so that the needle and thread can pass through the rolling strip and the cloth smoothly.

[0003] The patent application with application number 202121859513.X discloses a presser foot structure, which includes a first presser foot, a second presser foot, a connecting piece, a first spring and a second spring; the first presser foot is installed on the connecting piece, the first spring is installed between the first presser foot and the connecting piece, and the distance between the bottom surface of the first presser foot and the bottom surface of the connecting piece is adjustable through the first spring; the second presser foot is installed on the first presser foot; one end of the second spring is fixed, and the other end is installed on the second presser foot, and the distance between the bottom surface of the first presser foot and the bottom surface of the second presser foot is adjustable through the second spring; the distance between the bottom surface of the first presser foot and the bottom surface of the connecting piece is greater than the distance between the bottom surface of the second presser foot and the bottom surface of the connecting piece.

[0004] However, the above presser foot structure has the following problems: the second spring is sleeved on the guide post, the bottom end of the guide post is arranged in the second presser foot, and the other end of the guide post is fixed to the middle position of the upper surface of the first presser foot by a retaining spring. The retaining spring limits the up and down travel of the guide post, thereby making the travel of the second presser foot smaller. In addition, the retaining spring is not easy to install and disassemble. Utility Model Content

[0005] The utility model provides a presser foot structure to solve the technical problem that a guide column needs to be fixed by a clamping spring.

[0006] In order to solve the above technical problems, the utility model provides a presser foot structure, which is characterized by comprising a presser foot body, a presser foot plate, a guide column, a presser plate spring and a bolt;

[0007] The presser foot body comprises two cloth-pressing feet arranged at intervals, the presser foot plate is arranged between the two cloth-pressing feet, and the height of the lower surface of the presser foot plate is higher than the height of the lower surface of the cloth-pressing foot; the presser foot body is provided with a first through hole, the threaded portion of the bolt is arranged in the first through hole, and the head of the bolt is arranged outside the first through hole;

[0008] One end of the guiding column is fixed on the upper surface of the pressure plate, and the other end is connected to the threaded portion of the bolt through an internal thread. The guiding column can reciprocate along the axis direction of the first through hole.

[0009] The pressure plate spring is sleeved on the guiding column, and the diameter of the pressure plate spring is larger than that of the first through hole.

[0010] Preferably, the pressure foot structure further includes a mounting block, a fixed shaft and a pressure foot spring; the mounting block includes at least two side walls arranged at intervals, and a second through hole for fixing the fixed shaft is arranged on the side wall; a kidney-shaped hole matched with the fixed shaft is arranged on the pressure foot body, and the fixed shaft passes through the second through hole and the kidney-shaped hole to fix the pressure foot body on the mounting block; a spring hole for fixing the pressure foot spring is arranged on the pressure foot body, and the pressure foot spring is arranged between the spring hole and the mounting block.

[0011] Preferably, the number of the pressure foot bodies is three; the mounting block includes four parallel side walls, and one pressure foot body is arranged between every two adjacent side walls.

[0012] Preferably, the vertical height of the kidney-shaped hole on the pressure foot body located in the middle position is larger than that of the kidney-shaped holes on the pressure foot bodies on its two sides.

[0013] Preferably, the distance between every two adjacent side walls is equal.

[0014] Preferably, the pressure foot structure further includes an intermediate positioning block, and the intermediate positioning block is fixed at the front end of the pressure foot body in the middle position; the shape of the intermediate positioning block is triangular, and one corner of the intermediate positioning block is arranged vertically downward.

[0015] Preferably, the pressure foot structure further includes two strip baffles, and one strip baffle is respectively installed at the front ends of the pressure foot bodies on both sides.

[0016] Preferably, the pressure foot structure further includes a positioning screw. A screw hole is arranged on the pressure foot body, the screw hole is vertically communicated with the first through hole, and the positioning screw is arranged in the screw hole.

[0017] Preferably, the shape of the middle section of the lower surface of the side wall is arc-shaped, and the shapes of the two sides of the middle section of the lower surface of the side wall are line segments.

[0018] Preferably, the shape of the mounting block is in a shape of "ji", and a fixing hole and a bolt hole which are vertically communicated are arranged at the middle position of the mounting block.

[0019] A presser foot structure provided by the present utility model includes a presser foot body, a presser foot plate, a guide post, a presser plate spring, and a bolt. The guide post is fixed to the presser foot body by the bolt, and there is no need to use a circlip to fix the guide post to the presser foot body, so that the up and down strokes of the guide post and the presser foot plate can be larger, and the installation and disassembly between the guide post and the bolt are convenient. Description of the Drawings

[0020] Figure 1 is a schematic structural diagram of a presser foot structure provided by an embodiment of the present utility model.

[0021] Figure 2 is Figure 1 a schematic structural diagram after rotating a certain angle.

[0022] Figure 3 is Figure 1 an exploded schematic diagram.

[0023] Figure 4 is a schematic structural diagram when an installation block and the presser foot body are separated provided by an embodiment of the present utility model.

[0024] Figure 5 is a schematic structural diagram of an intermediate positioning block and a fabric provided by an embodiment of the present utility model.

[0025] [Explanation of the reference numerals is as follows]:

[0026] Presser foot body - 1, presser foot plate - 2, guide post - 3, presser plate spring - 4, bolt - 5, installation block - 6, fixed shaft - 7, presser foot spring - 8, intermediate positioning block - 9, roller baffle - 10, fabric one - 11, fabric two - 12;

[0027] Pressing presser foot - 101, first through hole - 102, waist-shaped hole - 103, screw hole - 104;

[0028] Second through hole - 601, fixing hole - 602, bolt hole - 603. Detailed Description of the Embodiment

[0029] To make the purpose, advantages, and features of the present utility model clearer, the following further describes in detail a presser foot structure proposed by the present utility model with reference to the accompanying drawings. It should be noted that the drawings are all in a very simplified form and use non-precise scales, only for conveniently and clearly assisting in explaining the purpose of the embodiments of the present utility model.

[0030] In the description of the present utility model, the qualifying words such as "first", "second", etc. are added for the convenience of description and reference, and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with qualifying words such as "first", "second", etc. may explicitly or implicitly include one or more of such features.

[0031] As Figures 1 to 3 shown, this embodiment provides a presser foot structure, including a presser foot main body 1, a presser foot plate 2, a guide post 3, a presser plate spring 4 and a bolt 5; the presser foot main body 1 includes two cloth pressing feet 101 arranged at intervals, the presser foot plate 2 is arranged between the two cloth pressing feet 101, and the height of the lower surface of the presser foot plate 2 is higher than the height of the lower surface of the cloth pressing feet 101; a first through hole 102 is arranged on the presser foot main body 1, the threaded part of the bolt 5 is arranged in the first through hole 102, and the head of the bolt 5 is arranged outside the first through hole 102; one end of the guide post 3 is fixed on the upper surface of the presser foot plate 2, and the other end is connected to the threaded part of the bolt 5 through an internal thread, and the guide post 3 can reciprocate along the axis direction of the first through hole 102; the presser plate spring 4 is sleeved on the guide post 3, and the diameter of the presser plate spring 4 is larger than the diameter of the first through hole 102.

[0032] A presser foot structure provided by this embodiment includes a presser foot main body 1, a presser foot plate 2, a guide post 3, a presser plate spring 4 and a bolt 5. The guide post 3 is fixed on the presser foot main body 1 through the bolt 5, and the guide post 3 no longer needs to be fixed on the presser foot main body 1 with a circlip, so that the up and down strokes of the guide post 3 and the presser foot plate 2 can be larger, and the installation and disassembly between the guide post 3 and the bolt 5 are convenient. A presser foot structure provided by this embodiment can sew a roll strip with a thickness of 0.5 mm to 1 mm.

[0033] Preferably, as Figures 1 to 3 shown, the presser foot structure further includes a mounting block 6, a fixed shaft 7 and a presser foot spring 8; the mounting block 6 includes at least two side walls arranged at intervals, and a second through hole 601 for fixing the fixed shaft 7 is arranged on the side wall; a kidney-shaped hole 103 matched with the fixed shaft 7 is arranged on the presser foot main body 1, and the fixed shaft 7 passes through the second through hole 601 and the kidney-shaped hole 103 to fix the presser foot main body 1 on the mounting block 6; a spring hole for fixing the presser foot spring 8 is arranged on the presser foot main body 1, and the presser foot spring 8 is arranged between the spring hole and the mounting block 6. The presser foot main body 1 moves up and down relative to the mounting block 6 through the presser foot spring 8, so as to sew fabrics with different thicknesses.

[0034] Preferably, as Figures 1 to 3As shown, the number of the presser foot bodies 1 is three; the mounting block 6 includes four side walls arranged in parallel, and one presser foot body 1 is arranged between every two adjacent side walls. Each presser foot body 1 corresponds to a presser foot plate 2. The three presser foot bodies 1 can correspond to three presser foot plates 2, and the three presser foot plates 2 can sew three scroll bars synchronously, improving the production efficiency.

[0035] Preferably, as Figure 3 and Figure 5 shown, the vertical height of the kidney-shaped hole 103 on the presser foot body 1 located in the middle position is greater than the vertical height of the kidney-shaped holes 103 on the presser foot bodies 1 on its two sides. When sewing two pieces of fabric, the height of the splicing part between the first piece of fabric 11 and the second piece of fabric 12 is higher than that on both sides, making the vertical height of the kidney-shaped hole 103 on the presser foot body 1 in the middle position higher. This can make the up and down stroke of the presser foot body 1 in the middle position larger, so that the presser foot body 1 in the middle position can more smoothly press the splicing part between the first piece of fabric 11 and the second piece of fabric 12. In other embodiments, if the splicing part between two pieces of fabric is not in the middle position, the presser foot body 1 with the largest vertical height of the kidney-shaped hole 103 can be moved to the outside.

[0036] Preferably, as Figure 3 shown, the distance between every two adjacent side walls is equal, so that the contour dimensions of the three presser foot bodies 1 are the same, which is convenient for replacing each presser foot body 1.

[0037] Preferably, as Figure 3 shown, the presser foot structure further includes an intermediate positioning block 9, and the intermediate positioning block 9 is fixed at the front end of the presser foot body 1 in the middle position; the shape of the intermediate positioning block 9 is triangular, and one corner of the intermediate positioning block 9 is vertically downward. The downward corner of the intermediate positioning block 9 can press the contact part between two pieces of fabric, making the splicing part flatter.

[0038] Preferably, as Figure 3 shown, the presser foot structure further includes two scroll bar baffles 10, and one scroll bar baffle 10 is respectively installed at the front ends of the presser foot bodies 1 on both sides. The scroll bar baffles 10 can limit the scroll bars to prevent the scroll bars from jumping up during the sewing process.

[0039] Preferably, as Figure 3As shown, the presser foot structure further includes a positioning screw. A screw hole 104 is provided on the presser foot body 1. The screw hole 104 is vertically communicated with the first through hole 102, and the positioning screw is arranged in the screw hole 104. The positioning screw enables the presser foot plate 2 to have two modes. One is that the positioning screw does not contact the guide post 3. At this time, the guide post 3 can move up and down, and the presser foot plate 2 can adapt to rollers of various thicknesses. The other is that the positioning screw contacts the guide post 3. At this time, the guide post 3 cannot move up and down, and the presser foot plate 2 only adapts to rollers of one thickness.

[0040] Preferably, as Figure 4 shown, the shape of the middle section of the lower surface of the side wall is arc-shaped, and the shapes of both sides of the middle section of the lower surface of the side wall are line segments. When the presser foot body 1 rises and contacts the lower surface of the side wall, the presser foot body 1 can rotate at a certain angle along the lower surface of the side wall, improving the pressing effect on the fabric.

[0041] Preferably, as Figure 3 shown, the shape of the mounting block 6 is in a shape like the Chinese character "ji", and a vertically communicated fixing hole 602 and bolt hole 603 are provided at the middle position of the mounting block 6. The mounting block 6 can be sleeved on the presser foot bar of the sewing machine through the fixing hole 602, and the mounting block 6 can be fixed on the presser foot bar of the sewing machine through the bolt hole 603 and the fixing bolt 5.

[0042] In summary, a presser foot structure provided by the present invention includes a presser foot body 1, a presser foot plate 2, a guide post 3, a pressing plate spring 4 and a bolt 5. The guide post 3 is fixed on the presser foot body 1 through the bolt 5. The guide post 3 no longer needs to be fixed on the presser foot body 1 with a circlip, so that the up and down strokes of the guide post 3 and the presser foot plate 2 can be larger, and the installation and disassembly between the guide post 3 and the bolt 5 are convenient.

[0043] The above description is only a description of the preferred embodiments of the present invention, and does not limit the scope of the present invention in any way. Any changes and modifications made by those of ordinary skill in the art according to the above disclosure are within the protection scope of the present invention.

Claims

1. A presser foot structure, characterized in that It includes a presser foot body, a presser foot plate, guide posts, a presser plate spring and bolts; The presser foot body includes two presser feet for pressing cloth arranged at intervals. The presser foot plate is arranged between the two presser feet for pressing cloth, and the height of the lower surface of the presser foot plate is higher than the height of the lower surface of the presser feet for pressing cloth. A first through hole is provided on the presser foot body, the threaded portion of the bolt is arranged in the first through hole, and the head of the bolt is arranged outside the first through hole; One end of the guide post is fixed on the upper surface of the presser foot plate, and the other end is connected to the threaded portion of the bolt through an internal thread. The guide post can reciprocate along the axis direction of the first through hole; The presser plate spring is sleeved on the guide post, and the diameter of the presser plate spring is larger than the diameter of the first through hole.

2. The presser foot structure according to claim 1, characterized in that, The presser foot structure further includes a mounting block, a fixed shaft and a presser foot spring; the mounting block includes at least two side walls arranged at intervals, and a second through hole for fixing the fixed shaft is provided on the side wall. A kidney-shaped hole matched with the fixed shaft is provided on the presser foot body, and the fixed shaft passes through the second through hole and the kidney-shaped hole to fix the presser foot body on the mounting block. A spring hole for fixing the presser foot spring is provided on the presser foot body, and the presser foot spring is arranged between the spring hole and the mounting block.

3. The presser foot structure according to claim 2, characterized in that, The number of the presser foot bodies is three; the mounting block includes four parallel side walls, and one presser foot body is arranged between every two adjacent side walls.

4. The presser foot structure according to claim 3, characterized in that, The vertical height of the kidney-shaped hole on the presser foot body located in the middle position is greater than the vertical height of the kidney-shaped holes on the presser foot bodies on its two sides.

5. The presser foot structure according to claim 3, characterized in that, The distance between every two adjacent side walls is equal.

6. The presser foot structure according to claim 4, characterized in that, The presser foot structure further includes an intermediate positioning block, and the intermediate positioning block is fixed at the front end of the presser foot body in the middle position. The shape of the intermediate positioning block is triangular, and one corner of the intermediate positioning block is arranged vertically downward.

7. The presser foot structure according to claim 6, wherein The presser foot structure further includes two roller baffles, and one roller baffle is respectively installed at the front end of the presser foot bodies on both sides.

8. The presser foot structure according to claim 1, wherein The presser foot structure further includes positioning screws. A screw hole is provided on the presser foot body, the screw hole is vertically communicated with the first through hole, and the positioning screws are arranged in the screw holes.

9. The presser foot structure according to claim 2, characterized in that, The shape of the middle section of the lower surface of the side wall is arc-shaped, and the shapes of the two sides of the middle section of the lower surface of the side wall are line segments.

10. The presser foot structure according to claim 2, characterized in that, The shape of the mounting block is in a shape of "ji", and a fixing hole and a bolt hole which are vertically communicated are provided at the middle position of the mounting block.

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