Thick material edge flatcar sewing machine presser foot with pressing groove

Abstract

A thick hemming material flatcar sewing machine presser foot with a pressing groove comprises a presser foot mounting seat, a roller and a presser foot plate. A connecting pin shaft is fixedly mounted on the presser foot mounting seat, a presser foot plate is sleeved on the connecting pin shaft in a penetrating manner, the presser foot plate is movably connected with the presser foot mounting seat through the connecting pin shaft, and meanwhile, a roller is also sleeved on the middle part of the connecting pin shaft in a penetrating manner and is clamped on the inner sides of two connecting lugs of the presser foot plate; a presser foot tip part of the presser foot plate is of an asymmetric structure, a first presser foot tip is longer than a second presser foot tip, the first presser foot tip and the second presser foot tip are connected together through a presser foot tip connecting block to form a whole, and the first presser foot tip, the second presser foot tip and the presser foot tip connecting block are combined to form a pressing groove in the bottom of the presser foot plate. According to the utility model, the thick hemming material is extruded and guided by the pressing groove when passing through the presser foot plate, so that the thick hemming material can be forced to pass through the presser foot plate according to the guide of the pressing groove below the presser foot plate when passing through the presser foot of the sewing machine, and the condition of deviation is prevented.

Description

Technical Field

[0001] The utility model relates to a presser foot of a sewing machine, in particular to a presser foot of a flat-bed sewing machine for thick material edges with a press groove; the presser foot of a flat-bed sewing machine for thick material edges with a press groove can effectively prevent deviation and bulging when sewing thick curled sewing materials; and belongs to the technical field of manufacturing presser foot parts for sewing machines. Background Art

[0002] The sewing machine presser foot is an indispensable part of the feeding mechanism of the sewing machine. Various forms of sewing machine presser feet play a very important role in the production process, such as the sewing machine presser foot for sewing visible stitches, hidden zipper special sewing machine presser foot, pleating sewing machine presser foot, etc. It is very important to choose different sewing machine presser feet in different sewing operations. And the sewing machine presser feet required by various sewing machines are also very different. Among them, the flat sewing machine is also called a flat sewing machine. It mainly uses a sewing thread to form a stitch on the sewing material, so that one or more layers of sewing materials are interwoven or sewn together. Usually, there are two types of flat sewing machines for thin materials and thick materials. When using a flat sewing machine to sew thick materials, such as various sportswear, jeans, fashion, coats, shoes and hats, leather, bags, etc.; the sewing machine presser foot used in sewing is usually a roller presser foot, so as to ensure that the stitches are neat and beautiful, the stitches are uniform, and the stitches are flat and firm. However, although the presser foot of the current flatbed sewing machine can basically meet the needs of sewing, it often deviates, skips stitches or bulges, especially when sewing thick materials with curled edges. Since the curled edge is narrow and the thickness is the thickest, it is easy to deviate and bulge when sewing, thus affecting the beauty of the sewing. It is very necessary to improve this.

[0003] To find the same technical reports through query retrieval, only the technical literature in related fields are found, and the closest ones are the following:

[0004] 1. The patent number is CN202320040455.0, and the utility model patent named "A presser foot for a flatbed sewing machine" discloses a presser foot for a flatbed sewing machine, including a first connecting frame, a second connecting frame and a presser foot plate, the left and right sides of the first connecting frame are respectively connected to the presser foot plates through the second connecting frame, the two presser foot plates are respectively rotatably connected to the second connecting frame through a rotating shaft, one end of the rotating shaft extends to the outside of the second connecting frame and is connected to a knob, a locking pin is slidably connected to the knob, and a plurality of locking holes adapted to the locking pin are opened on one side of the second connecting frame, so that the locking pin can slide into the locking hole to lock the knob.

[0005] 2. Patent number CN202223122407.0, utility model patent named "Ordinary flat sewing machine shirt placket curling tool", the patent discloses a common flat sewing machine shirt placket curling tool, related to the field of sewing machine technology. The utility model includes a presser foot handle, the lower surface of the presser foot handle is provided with a mounting groove, the mounting groove is rotatably connected to a connecting pin, the connecting pin is rotatably connected to the left presser foot sole plate, the middle presser foot sole plate and the right presser foot sole plate, a tooth seat is arranged below the presser foot handle, the upper surface of the tooth seat is fixedly connected to the first bevel tooth and the second bevel tooth, the two second bevel teeth are arranged symmetrically about the first bevel tooth.

[0006] 3. Patent number CN202222853217.X, utility model patent application named "A presser foot for a flatbed sewing machine", which discloses a presser foot for a flatbed sewing machine, including a presser foot body and a press rod, the bottom end of the press rod is fixedly connected to a mounting block, the presser foot body is mounted on the mounting block, a groove is provided on the upper surface of the presser foot body, and through openings communicating with the interior of the groove are provided on both sides of the presser foot body, and a square block is slidably connected to the inner wall of the through opening. The presser foot of the flatbed sewing machine presses the mounting strip, which drives the connecting rod to move, pushes the square block out of the groove, and then makes the connecting rod located in the groove, and the conical spring is pressed, then the groove of the presser foot body is aligned with the mounting block, and the presser foot body is pushed up, so that the mounting block is located in the groove, at which time the connecting rod enters the mounting opening through the through opening, and the mounting strip is loosened. Under the push of the conical spring, the mounting strip drives the connecting rod to be pulled out and the square block is pulled into the mounting opening, thereby completing the fixation of the presser foot body, so that the presser foot can be disassembled and assembled without tools.

[0007] Through careful analysis of the above patents, it is found that although these patents all involve improvements to the presser foot of flatbed sewing machines and also propose some technical improvement plans, the technical solutions proposed by these patent technologies are relatively complex solutions, which are very inconvenient in actual use. Moreover, for the sewing of curled edges of thick materials, the expected effect cannot be achieved, and deviation and bulging still occur. In this way, the problems mentioned above still exist, so it is very necessary to improve them. Utility Model Content

[0008] The technical problem to be solved by the utility model is that, in view of the problem that the presser foot of the existing flat-bed sewing machine is prone to deviation and bulging when sewing thick material curling edges, a presser foot of the flat-bed sewing machine for thick material edges with a pressing groove is proposed; the presser foot of the flat-bed sewing machine for thick material edges with a pressing groove can effectively prevent the deviation and bulging phenomena when sewing thick curling sewing materials.

[0009] The utility model is mainly realized by the following technical scheme: a presser foot of a flat-bed sewing machine for thick-material edges with a pressing groove, comprising a presser foot mounting seat, a roller and a presser foot plate; a connecting pin is fixedly mounted on the presser foot mounting seat, and the presser foot plate has two connecting ears, which are sleeved on the connecting pin, so that the presser foot plate is rotatably connected with the presser foot mounting seat through the connecting pin, and the roller is also sleeved on the middle part of the connecting pin and clamped on the inner sides of the two connecting ears of the presser foot plate; the presser foot tip part of the presser foot plate is an asymmetric structure, the first presser foot tip is longer than the second presser foot tip, and the first presser foot tip and the second presser foot tip are connected together to form an integral body through a presser foot tip connecting block, and the first presser foot tip and the second presser foot tip and the presser foot tip connecting block are combined to form a pressing groove at the bottom of the presser foot plate, and the thick curled edge material is squeezed and guided by the pressing groove when the thick curled edge material passes through the presser foot plate; in this way, the thick curled edge material can be effectively prevented from running or bulging when entering the position of the sewing machine needle through the guidance of the pressing groove.

[0010] Furthermore, the pressing groove is a lower opening pressing groove formed by the combination of the first pressing foot tip, the second pressing foot tip and the inner side surface of the pressing foot tip connecting block, located between the first pressing foot tip and the second pressing foot tip of the presser foot plate, and opening downward.

[0011] Furthermore, the lower opening pressing groove is a trumpet-shaped pressing groove, the outermost entrance of the lower opening pressing groove is the widest, and the exit close to the sewing machine needle hole is the narrowest.

[0012] Furthermore, the bell-shaped pressing groove is higher in the front and lower in the back, the groove at the entrance is the deepest, and the groove at the sewing machine needle hole is the shallowest, forming an oblique conical bell-shaped groove.

[0013] Furthermore, the inclined surface of the conical bell-mouth groove is an arc-shaped curved surface.

[0014] Furthermore, the first presser foot tip and the second presser foot tip are presser feet of unequal width, wherein the first presser foot tip is wider than the second presser foot tip, so as to ensure that the inner surface of the press groove side of the lower opening press groove close to the first presser foot tip and the inner surface of the needle hole on one side of the sewing machine needle hole on the presser foot plate smoothly transition in the same plane.

[0015] Furthermore, the cross-sectional shape of the groove includes a rectangular groove and a semicircular arc groove.

[0016] Furthermore, the presser foot plate is provided with a sewing machine needle hole, which is an elliptical waist-shaped hole.

[0017] Furthermore, the front hole tip of the waist-shaped hole is connected to the pressing groove at the bottom of the presser foot plate formed by the combination of the first presser foot tip, the second presser foot tip and the presser foot tip connecting block.

[0018] Furthermore, one side of the waist-shaped hole is smoothly connected to one side of the pressing groove, ensuring smooth entry of sewing materials.

[0019] The beneficial effects of the above technical solution of the utility model are:

[0020] The utility model adopts a sewing machine presser foot with a conical press groove, which can effectively prevent deviation and bulging when sewing thick curled sewing materials, and has the following advantages.

[0021] The utility model connects the front parts of the first presser foot tip and the second presser foot tip through a presser foot connecting plate, and forms a pressing groove for pressing materials below, so that the narrow edge part of the thick curling edge can be guided by the pressing groove to enter the needle hole position of the sewing machine, thereby effectively ensuring that the thick curling edge will not deviate;

[0022] The pressing groove of the utility model adopts a conical bell mouth form, which can adapt to the passage of a wide range of thick curling materials, and can effectively prevent the thick curling from running off by gradually reducing the width of the edge material;

[0023] The arc-shaped conical groove top surface of the utility model can gradually compact the thick curling material entering, thereby effectively preventing bulging;

[0024] The utility model sets the first presser foot tip and the second presser foot tip to have unequal widths, and ensures that the inner side surface of the first presser foot tip and the inner side surface of the sewing machine needle hole are smoothly transitioned, so that the feeding can be ensured to be smooth without jamming. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure involved in the utility model;

[0026] Figure 2 This is a front view schematic diagram of the presser foot structure of the utility model;

[0027] Figure 3 for Figure 2 A schematic diagram of a top view structure;

[0028] Figure 4 for Figure 2 Schematic diagram of the structure viewed from above;

[0029] Figure 5 for Figure 2 A schematic cross-sectional structure diagram of ;

[0030] Figure 6 Schematic diagram of the groove cross section. DETAILED DESCRIPTION

[0031] The utility model is described in detail below with reference to the accompanying drawings and specific embodiments. Embodiment 1

[0032] As shown in the accompanying drawings, a presser foot of a flat-bed sewing machine with a thick material edge having a press groove, the presser foot of the flat-bed sewing machine with a thick material edge having a press groove comprises a presser foot mounting seat 1, a roller 2 and a presser foot plate 3; the lower part of the presser foot mounting seat 1 is provided with two connecting forks 4, and the top of the presser foot mounting seat 1 is provided with a connecting block 7; there are connecting pin shaft mounting holes 5 on the two connecting forks 4 of the presser foot mounting seat 1, and a connecting pin shaft 6 is fixedly installed on the connecting pin shaft mounting hole 5; the presser foot plate 3 is provided with two connecting ears 301, and the two connecting ears 301 are sleeved on the connecting pin shaft 6, so that the presser foot plate 3 forms a rotatable and movable connection with the presser foot mounting seat 1 through the connecting pin shaft 6, and at the same time, the roller 2 is also sleeved on the middle part of the connecting pin shaft 6, and is stuck on the two connecting ears of the presser foot plate 3 The inner side of the ear 301; its characteristic is that the presser toe portion 302 of the presser foot 3 is an asymmetric structure, the first presser toe 3011 of the presser toe portion 302 is longer than the second presser toe 3012, and the first presser toe 3011 and the second presser toe 3012 are connected together by a presser toe connecting block 3013 to form a whole, and the first presser toe 3011 and the second presser toe 3012 and the presser toe connecting block 3013 are combined to form a pressing groove 304 at the bottom of the presser foot 3, and the thick curling material is squeezed and guided by the pressing groove 304 when the thick curling material passes through the presser foot 3; in this way, the guidance of the pressing groove 304 can effectively prevent the thick curling material from running or bulging when it enters the position of the sewing machine needle. Among them,

[0033] The pressing groove 304 is a lower opening pressing groove formed by the inner side of the first pressing foot tip 3011, the second pressing foot tip 3012 and the pressing foot tip connecting block 3013, and is located between the first pressing foot tip 3011 and the second pressing foot tip 3012 of the presser foot plate and opens downward.

[0034] The lower opening pressing groove is a trumpet-shaped pressing groove, the outermost entrance 3014 of the lower opening pressing groove is the widest, and the exit 3015 close to the sewing machine needle hole 305 is the narrowest.

[0035] The bell-shaped groove is high in the front and low in the back, the groove at the entrance 3014 is the deepest, and the groove at the exit 3015 is the shallowest, forming an oblique conical bell-shaped groove.

[0036] The inclined surface 3018 of the conical bell-mouth groove is an arc-shaped curved surface.

[0037] The first presser foot tip 3011 and the second presser foot tip 3012 are presser feet of unequal width, wherein the first presser foot tip 3011 is wider than the second presser foot tip 3012, so as to ensure that the inner surface 3016 of the press groove side of the lower opening press groove close to the first presser foot tip 3011 and the inner surface 3017 of the needle hole on one side of the sewing machine needle hole 305 on the presser foot plate 3 smoothly transition on the same plane.

[0038] The cross-sectional shape of the pressing groove 304 is a rectangular groove.

[0039] The presser foot plate 3 is provided with a sewing machine needle hole 305, and the sewing machine needle hole 305 is an elliptical waist-shaped hole.

[0040] The front hole tip 802 of the waist-shaped hole is connected to the pressing groove 304 at the bottom of the presser foot plate 3 formed by the combination of the first presser foot tip 3011 , the second presser foot tip 3012 and the presser foot tip connecting block 3013 .

[0041] An inner side of the waist-shaped hole of the sewing machine needle hole 305 is smoothly connected to an inner side of the pressing groove 304 to ensure smooth entry of the sewing material.

[0042] The rear end of the presser foot plate 3 is also provided with a roller mounting hole 303 for mounting the roller 2. The roller 2 passes through the roller mounting hole 303 and extends out of the presser foot plate 3 to press the sewing curling material. Embodiment 2

[0043] The structure of the second embodiment is basically the same as that of the embodiment, except that the cross-sectional shape of the groove is an arc-shaped groove (not shown in the accompanying drawings), thus forming a semi-conical bell-mouth groove, which can also achieve the purpose of the utility model, and the processing and manufacturing will be simpler, but the effect of preventing bulging will be affected to a certain extent.

[0044] The embodiments listed above are only used to clearly and completely describe the technical solutions of the present utility model in combination with the accompanying drawings; obviously, the described embodiments are only part of the embodiments of the present utility model, rather than all of the embodiments, and the terms such as "upper", "lower", "front", "back", "middle" etc. quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the present utility model. Changes or adjustments in their relative relationships should also be regarded as the scope of the implementation of the present utility model without substantially changing the technical content.

[0045] At the same time, the structures, proportions, sizes, etc. illustrated in the drawings of the specification are only used to match the contents disclosed in the specification so that people familiar with this technology can understand and read them. They are not used to limit the conditions under which the present invention can be implemented, so they have no substantive technical significance. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical content disclosed by the present invention without affecting the effects and purposes that can be achieved by the present invention.

[0046] Based on the embodiments of the present utility model, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present utility model.

[0047] The beneficial effects of the above technical solution of the utility model are:

[0048] The utility model adopts a sewing machine presser foot with a conical press groove, which can effectively prevent deviation and bulging when sewing thick curled sewing materials, and has the following advantages.

[0049] 1. The utility model connects the front part of the first presser foot tip and the second presser foot tip through a presser foot connecting plate, and forms a pressing groove for pressing materials below, so that the narrow edge part of the thick curling edge can be guided into the needle hole position of the sewing machine through the pressing groove, thereby effectively ensuring that the thick curling edge will not deviate;

[0050] 2. The pressing groove of the utility model adopts a conical bell-mouth form, which can adapt to the passage of a wide range of thick curling materials. By gradually reducing the width of the edge material, the deviation of the thick curling can be effectively prevented;

[0051] 3. The arc-shaped conical groove top surface of the utility model can gradually compact the thick curling material entering, thereby effectively preventing bulging;

[0052] 4. The utility model sets the first presser toe tip and the second presser toe tip to have unequal widths and ensures a smooth transition between the inner side of the first presser toe tip and the inner side of the needle hole of the sewing machine, so that smooth feeding can be ensured without jamming.

Claims

1. A presser foot for a flat-bed sewing machine with a thick material edge and a presser groove, comprising a presser foot mounting seat, a roller and a presser foot plate; a connecting pin is fixedly mounted on the presser foot mounting seat, and the presser foot plate has two connecting ears, which are sleeved on the connecting pin, so that the presser foot plate is rotatably connected to the presser foot mounting seat through the connecting pin, and the roller is also sleeved on the middle part of the connecting pin and clamped on the inner sides of the two connecting ears of the presser foot plate; the characteristics are: The presser toe part of the presser foot is an asymmetric structure, the first presser toe is longer than the second presser toe, and the first presser toe and the second presser toe are connected together through a presser toe connecting block to form a whole, and the first presser toe and the second presser toe and the presser toe connecting block are combined to form a pressing groove at the bottom of the presser foot, and the thick curled material is extruded and guided through the pressing groove when the thick curled material passes through the presser foot.

2. The presser foot for a flat sewing machine with a press groove for thick material edges as claimed in claim 1, characterized in that: The pressing groove is a lower opening pressing groove formed by the first pressing foot tip, the second pressing foot tip and the inner side of the pressing foot tip connecting block, located between the first pressing foot tip and the second pressing foot tip of the presser foot plate, and opening downward.

3. The presser foot for a thick material edge flat sewing machine with a press groove as claimed in claim 2, characterized in that: The lower opening pressing groove is a trumpet-shaped pressing groove, the outermost entrance of the lower opening pressing groove is the widest, and the exit near the sewing machine needle hole is the narrowest.

4. The presser foot for a thick material edge flat sewing machine with a pressing groove as claimed in claim 3, characterized in that: The bell-shaped pressing groove is a pressing groove which is high in the front and low in the back, the groove at the entrance is the deepest, and the groove at the sewing machine needle hole is the shallowest, forming an oblique conical bell-shaped groove.

5. The presser foot for a thick material edge flat sewing machine with a press groove as claimed in claim 4, characterized in that: The inclined surface of the conical bell-mouth groove is an arc-shaped curved surface.

6. The presser foot for a flat-bed sewing machine with a press groove for thick material edges as claimed in claim 2, characterized in that: The first presser foot tip and the second presser foot tip are presser feet of unequal width, wherein the first presser foot tip is wider than the second presser foot tip to ensure that the inner surface of the press groove side of the lower opening press groove close to the first presser foot tip and the inner surface of the needle hole on one side of the sewing machine needle hole on the presser foot plate smoothly transition in the same plane.

7. The presser foot for a thick material edge flat sewing machine with a pressing groove as claimed in claim 2 or 3, characterized in that: The cross-sectional shapes of the grooves include rectangular grooves and semicircular grooves.

8. The presser foot for thick material edge flat sewing machine with a press groove as claimed in claim 1, characterized in that: The presser foot plate is provided with a sewing machine needle hole, which is an elliptical waist-shaped hole.

9. The presser foot for a thick material edge flat sewing machine with a pressing groove as claimed in claim 8, characterized in that: The front hole tip of the waist-shaped hole is connected with the first presser foot tip, the second presser foot tip and the presser foot tip connecting block to form a press groove at the bottom of the presser foot plate.

10. The presser foot for thick material edge flat sewing machine with a press groove as claimed in claim 8, characterized in that: One side of the waist-shaped hole is smoothly connected to one side of the pressing groove, ensuring smooth entry of sewing materials.

Images