Presser foot assembly and sewing machine

Abstract

The utility model discloses a presser foot assembly and a sewing machine, and relates to the technical field of sewing machines, the presser foot assembly comprises a left presser foot and a right presser foot, the end part of the left presser foot is provided with a left pressing claw, the end part of the right presser foot is provided with a right pressing claw, and the left pressing claw and the right pressing claw are linearly distributed; the left pressing sleeve is detachably and fixedly arranged on the left pressing claw; the right pressing sleeve is detachably and fixedly arranged on the right pressing claw; the left pressing sleeve and the right pressing sleeve are both used for pressing cloth. Due to the fact that the left pressing sleeve and the right pressing sleeve are additionally arranged, when cloth is replaced, for example, when a knitting mode is switched to a tatting mode, the left pressing sleeve and the right pressing sleeve are directly installed, the pressing foot does not need to be detached, the detaching time of the pressing foot is saved, and sewing efficiency can be improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to sewing machine technical field, especially a presser foot assembly and sewing machine. BACKGROUND

[0002] Taking a lock stitch machine as an example, its application range is wide, can be used for sewing thinner knitted fabrics to better denim fabrics, and its adapted fabric thickness is also different, therefore, when using the lock stitch machine, the type, elasticity, thickness and other factors of the fabric need to be considered to select the lock stitch machine, and different fabrics correspond to different configurations.

[0003] How to unify different configurations of the lock stitch machine so that it can be from thin to thick and from high elasticity to no elasticity is a big problem in front of the R&D personnel, and the existing lock stitch machine adopts the scheme of equipping different pressers for different fabrics, and when changing the fabric, different pressers are selected according to the different fabric elasticity and thickness, and in this process, the supply frame for installing the presser needs to be disassembled, and then the presser is replaced. For example, when knitting is needed, the presser needs to be replaced, otherwise, the phenomenon of fabric instability, excessive floating and high failure rate will occur when using the weft knitting presser to knit. However, in the process of replacing the presser, a large amount of time is wasted due to the need to disassemble many parts, which greatly affects the sewing efficiency. SUMMARY

[0004] The utility model aims at providing a presser foot assembly and sewing machine, the left presser foot is detachably provided with a left presser cover, and the right presser foot is detachably provided with a right presser cover, so as to solve the technical problem of low sewing efficiency caused by frequent disassembly and assembly of the presser foot.

[0005] To achieve the above-mentioned purpose, the utility model provides a presser foot assembly, which comprises a left presser foot and a right presser foot, the end of the left presser foot is provided with a left presser claw, the end of the right presser foot is provided with a right presser claw, and the left presser claw and the right presser claw are linearly distributed; further comprising: a left presser cover detachably and fixedly arranged on the left presser claw and a right presser cover detachably and fixedly arranged on the right presser claw; the left presser cover and the right presser cover are both used for pressing the fabric.

[0006] Preferably, the left presser cover comprises a left presser plate and at least one group of left buckle assemblies buckled with the left presser claw, and the right presser cover comprises a right presser plate and at least one group of right buckle assemblies buckled with the right presser claw.

[0007] Preferably, the left presser claw comprises a first left presser plate, a second left presser plate and a third left presser plate, which are sequentially connected to form a left presser groove, and the left presser groove is a U-shaped structure; wherein the first left presser plate is connected with the left presser rod of the left presser foot, and the first left presser plate and the third left presser plate are parallel to each other and both vertically connected with the second left presser plate.

[0008] The right pressing claw comprises a first right pressing plate, a second right pressing plate and a third right pressing plate, which are sequentially connected to form a right pressing groove, and the right pressing groove is in a U-shaped structure, and the openings of the left pressing groove and the right pressing groove are opposite to each other; wherein the first right pressing plate is connected with the right pressing rod of the right pressing foot, and the first right pressing plate and the third right pressing plate are parallel to each other and are both connected with the second right pressing plate perpendicularly.

[0009] Preferably, the left buckle assembly comprises a first left buckle connected with one side of the first left pressing plate facing the left pressing groove, a second left buckle connected with one side of the second left pressing plate away from the left pressing groove, a third left buckle connected with one side of the third left pressing plate facing the left pressing groove, a second left clamping plate abutting one side of the second left pressing plate facing the left pressing groove, and a third left clamping plate abutting one side of the third left pressing plate away from the left pressing groove.

[0010] The right buckle assembly comprises a first right buckle connected with one side of the first right pressing plate facing the right pressing groove, a second right buckle connected with one side of the second right pressing plate away from the right pressing groove, a third right buckle connected with one side of the third right pressing plate facing the right pressing groove, a second right clamping plate abutting one side of the second right pressing plate facing the right pressing groove, and a third right clamping plate abutting one side of the third right pressing plate away from the right pressing groove.

[0011] Preferably, the bottom of the left pressing claw and the bottom of the right pressing claw are both provided with a pressing convex.

[0012] Preferably, one side of the left pressing sleeve facing the left pressing claw is provided with a left buffer pad, and one side of the right pressing sleeve facing the left pressing claw is provided with a right buffer pad.

[0013] Preferably, the bottom of the left pressing sleeve and the bottom of the right pressing sleeve are both provided with an anti-skid convex.

[0014] Preferably, the left pressing sleeve is provided with a left U-shaped groove, and the right pressing sleeve is provided with a right U-shaped groove; and the openings of the left U-shaped groove and the right U-shaped groove are opposite to each other.

[0015] Preferably, one side of the left U-shaped groove is formed with a left U-shaped blocking strip abutting the inner side of the left pressing groove, and one side of the right U-shaped groove is formed with a right U-shaped blocking strip abutting the inner side of the right pressing groove.

[0016] The utility model also provides a sewing machine comprising the above-mentioned presser foot assembly.

[0017] Compared with the prior art, the utility model adds a left pressing sleeve and a right pressing sleeve, the left pressing sleeve is detachably fixed to the left pressing claw, and the right pressing sleeve is detachably fixed to the right pressing claw; when the cloth is changed, for example, when the presser foot is switched from knitting to weaving, the left pressing sleeve and the right pressing sleeve can be directly installed, and the presser foot does not need to be disassembled, the disassembly time of the presser foot is saved, and the sewing efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained based on the provided drawings without creative labor.

[0019] Figure 1 The schematic view of the presser assembly provided by the embodiment of the present application;

[0020] Figure 2 The other view of the presser assembly provided by the embodiment of the present application; Figure 1

[0021] Figure 3 The state diagram when the left press sleeve and the right press sleeve are not carried; Figure 1

[0022] Figure 4 The schematic view of the left presser in the presser assembly; Figure 1

[0023] Figure 5 The schematic view of the right presser in the presser assembly; Figure 1

[0024] Figure 6 The schematic view of the left press sleeve in the presser assembly; Figure 1

[0025] The other view of the presser assembly provided by the embodiment of the present application; Figure 7 Figure 6 The schematic view of the right press sleeve in the presser assembly.

[0026] Figure 8 The following are the signs of the drawings: Figure 1

[0027] The left presser 1, the right presser 2, the left press sleeve 3, the right press sleeve 4, the material pressing protrusion 5 and the anti-skid protrusion 6;

[0028] The left press claw 11, the left press groove 12 and the left press rod 13;

[0029] The right press claw 21, the right press groove 22 and the right press rod 23;

[0030] The left press plate 31, the first left buckle 32, the second left buckle 33, the third left buckle 34, the second left clamping plate 35, the third left clamping plate 36, the left U-shaped groove 37 and the left U-shaped blocking strip 38;

[0031] The right press plate 41, the first right buckle 42, the second right buckle 43, the third right buckle 44, the second right clamping plate 45, the third right clamping plate 46, the right U-shaped groove 47 and the right U-shaped blocking strip 48;

[0032] The right press plate 41, the first right buckle 42, the second right buckle 43, the third right buckle 44, the second right clamping plate 45, the third right clamping plate 46, the right U-shaped groove 47 and the right U-shaped blocking strip 48; The right press plate 41, the first right buckle 42, the second right buckle 43, the third right buckle 44, the second right clamping plate 45, the third right clamping plate 46, the right U-shaped groove 47 and the right U-shaped blocking strip 48;​​​​​

[0033] The first left pressing plate 111, the second left pressing plate 112 and the third left pressing plate 113;

[0034] The first right pressing plate 211, the second right pressing plate 212 and the third right pressing plate 213. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0036] In order for those skilled in the art to better understand the technical solutions of the present application, the present application will be further described in detail below with reference to the drawings and specific embodiments.

[0037] The present application discloses a presser foot assembly, as shown in the accompanying drawings Figures 1 to 5 The left presser foot 1 comprises a left presser rod 13 and a left presser claw 11 integrally arranged at one end of the left presser rod 13, and the right presser foot 2 comprises a right presser rod 23 and a right presser claw 21 integrally arranged at one end of the right presser rod 23. The left presser claw 11 and the right presser claw 21 are linearly distributed and located in the same plane.

[0038] The presser foot assembly further comprises a left presser sleeve 3 and a right presser sleeve 4. The left presser sleeve 3 is detachably and fixedly arranged on the left presser claw 11, and the right presser sleeve 4 is detachably and fixedly arranged on the right presser claw 21. The present application can not only press the fabric by using the left presser claw 11 and the right presser claw 21 alone, but also press the fabric by using the left presser sleeve 3 and the right presser sleeve 4. In combination with the feeding plate moving back and forth during the sewing process, the fabric is prevented from sliding during the sewing process to affect the sewing quality.

[0039] The present application newly adds the left presser sleeve 3 and the right presser sleeve 4. When the fabric is replaced, for example, when switching from knitting to weaving presser foot, the left presser sleeve 3 and the right presser sleeve 4 can be directly installed, without the need to disassemble the presser foot, saving the disassembly time of the presser foot, and being conducive to improving the sewing efficiency.

[0040] The left presser sleeve 3 and the right presser sleeve 4 are flexible presser sleeves. During sewing, the left presser sleeve 3 and the right presser sleeve 4 increase the contact area with the fabric by elastic deformation, thereby limiting the floating amount of the fabric, and relying on the easy disassembly feature to solve the pain point of presser foot quick replacement.

[0041] The left pressing sleeve 3 comprises a left pressing plate 31 and at least one set of left buckle assemblies buckled with the left pressing claw 11, and the right pressing sleeve 4 comprises a right pressing plate 41 and at least one set of right buckle assemblies buckled with the right pressing claw 21, that is, the left pressing sleeve 3 and the right pressing sleeve 4 in the utility model are both buckled by buckles, so that the structure is simpler and the disassembly and assembly are more convenient.

[0042] As a preferred embodiment, as shown in the accompanying drawings, Figure 4 The left pressing claw 11 comprises a first left pressing plate 111, a second left pressing plate 112 and a third left pressing plate 113, which are sequentially connected to enclose the left pressing groove 12, and the left pressing groove 12 is a U-shaped structure; wherein the first left pressing plate 111 is connected with the left pressing rod 13 of the left pressing foot 1, and the first left pressing plate 111 and the third left pressing plate 113 are both parallel to each other and are both connected with the second left pressing plate 112 perpendicularly; the widths of the first left pressing plate 111, the second left pressing plate 112 and the third left pressing plate 113 are equal, and the lengths of the first left pressing plate 111 and the third left pressing plate 113 are equal.

[0043] As shown in the accompanying drawings, Figure 5 The right pressing claw 21 comprises a first right pressing plate 211, a second right pressing plate 212 and a third right pressing plate 213, which are sequentially connected to enclose the right pressing groove 22, and the right pressing groove 22 is a U-shaped structure, and the left pressing groove 12 and the right pressing groove 22 are oppositely open; wherein the first right pressing plate 211 is connected with the right pressing rod 23 of the right pressing foot 2, and the first right pressing plate 211 and the third right pressing plate 213 are both parallel to each other and are both connected with the second right pressing plate 212 perpendicularly; the widths of the first right pressing plate 211, the second right pressing plate 212 and the third right pressing plate 213 are equal, and the lengths of the first right pressing plate 211 and the third right pressing plate 213 are equal. In addition, it should be noted that in the process of sewing the pattern, each needle point of the pattern is between the left pressing groove 12 and the right pressing groove 22, the needle distance is less than the widths of the left pressing groove 12 and the right pressing groove 22, and the pattern length is less than 2 times the lengths of the left pressing groove 12 and the right pressing groove 22.

[0044] As shown in the accompanying drawings, Figure 6 And 7 The left buckle assembly comprises a first left buckle 32 buckled with one side of the first left pressing plate 111 facing the left pressing groove 12, a second left buckle 33 buckled with one side of the second left pressing plate 112 away from the left pressing groove 12, a third left buckle 34 buckled with one side of the third left pressing plate 113 facing the left pressing groove 12, a second left clamping plate 35 abutting one side of the second left pressing plate 112 facing the left pressing groove 12, and a third left clamping plate 36 abutting one side of the third left pressing plate 113 away from the left pressing groove 12; the left buckle assembly provides constraint from the inner and outer sides of the left pressing groove 12, limits the movement of the left pressing sleeve 3 relative to the left pressing claw 11, and ensures that the left pressing sleeve 3 is fixed reliably.

[0045] As shown in the accompanying drawings, Figure 8As shown, the right clamping assembly includes a first right clamping buckle 42 clamped to the side of the first right pressing plate 211 facing the right pressing groove 22, a second right clamping buckle 43 clamped to the side of the second right pressing plate 212 away from the right pressing groove 22, a third right clamping buckle 44 clamped to the side of the third right pressing plate 213 facing the right pressing groove 22, a second right clamping plate 45 abutting to the side of the second right pressing plate 212 facing the right pressing groove 22, and a third right clamping plate 46 abutting to the side of the third right pressing plate 213 away from the right pressing groove 22. The right clamping assembly provides constraints from both the inner and outer sides of the right pressing groove 22, limits the movement of the right pressing sleeve 4 relative to the right pressing claw 21, and ensures the reliable fixation of the right pressing sleeve 4.

[0046] In addition, the left and right clamping assemblies can be made of PC (Polycarbonate), PA (Polyamide), or ABS (Acrylonitrile Butadiene Styrene) materials, which have good impact resistance, high toughness, and other advantages, preventing breakage and ensuring reliable gripping of the left and right pressing claws 11 and 21.

[0047] As shown in the accompanying drawings, Figure 3 As shown, the bottom of each of the left and right pressing claws 11 and 21 is provided with a pressing protrusion 5, which increases the friction between the left and right pressing claws 11 and 21 and the fabric, preventing fabric slipping during sewing. The pressing protrusion 5 can be a matrix of conical protrusions.

[0048] The side of the left pressing sleeve 3 facing the left pressing claw 11 is provided with a left buffer pad, and the side of the right pressing sleeve 4 facing the left pressing claw 11 is provided with a right buffer pad. When the left and right presser feet 1 and 2 are pressed down, the pressing protrusion 5 directly applies pressure to the left or right buffer pad, which is deformed to achieve buffering, avoiding damage from the pressing protrusion 5 and preventing the left and right pressing sleeves 3 and 4 from being crushed. The left and right buffer pads can be made of rubber, shock-absorbing rubber, or EVA (Ethylene Vinyl Acetate Copolymer) material, ensuring good shock-absorbing and buffering performance.

[0049] As shown in the accompanying drawings, Figure 7As shown, both the left pressure sleeve 3 and the right pressure sleeve 4 have anti-slip protrusions 6 at their bottoms, increasing the friction between the left pressure sleeve 3 and the fabric, and between the right pressure sleeve 4 and the fabric, preventing the fabric from slipping during sewing and improving sewing quality. Alternatively, anti-slip stickers can be attached to the bottoms of the left pressure sleeve 3 and the right pressure sleeve 4; these stickers also have an uneven texture on their bottoms and still serve the purpose of preventing slippage. In a preferred embodiment, both the left pressure sleeve 3 and the right pressure sleeve 4 include a core plate and an outer sleeve. The core plate can be folded from a thin steel plate, and the outer sleeve is integrally molded and covers the core plate; specifically, it can be a rubber sleeve, giving the left pressure sleeve 3 and the right pressure sleeve 4 flexibility.

[0050] It should also be noted that the structure and distribution of the pressing protrusions 5 and the anti-slip protrusions 6 can be designed according to the pattern required by the fabric. For example, when the pattern required by the fabric is a woven presser foot pattern, the pressing protrusions 5 and the anti-slip protrusions 6 are arranged more densely; when the pattern required by the fabric is a thick presser foot pattern, the pressing protrusions 5 and the anti-slip protrusions 6 are arranged more sparsely.

[0051] As attached Figure 6 and 8 As shown, the left pressure sleeve 3 is provided with a left U-shaped groove 37, and the right pressure sleeve 4 is provided with a right U-shaped groove 47; the openings of the left U-shaped groove 37 and the right U-shaped groove 47 are opposite each other. A left U-shaped stop 38 is formed on one side of the groove edge of the left U-shaped groove 37. The left U-shaped stop 38 abuts against the inner side of the left pressure groove 12, increasing the constraint between the left pressure claw 11 and the left pressure sleeve 3, and ensuring that the left pressure sleeve 3 and the left pressure claw 11 are more firmly fixed; a right U-shaped stop 48 is formed on one side of the groove edge of the right U-shaped groove 47. The right U-shaped stop 48 abuts against the inner side of the right pressure groove 22, increasing the constraint between the right pressure claw 21 and the right pressure sleeve 4, and ensuring that the right pressure sleeve 4 and the right pressure claw 21 are more firmly fixed.

[0052] This utility model also discloses a sewing machine including the above-described presser foot assembly, which has the same beneficial effects.

[0053] It should be noted that in this specification, relational terms such as first and second are used only to distinguish one entity from several other entities, and do not necessarily require or imply any such actual relationship or order between these entities.

[0054] This article uses specific examples to illustrate the principles and implementation methods of this utility model. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principles of this utility model, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A presser foot assembly characterized by, The left pressing foot (1) and the right pressing foot (2), the end of the left pressing foot (1) is provided with a left pressing claw (11), the end of the right pressing foot (2) is provided with a right pressing claw (21), the left pressing claw (11) and the right pressing claw (21) are linearly distributed and are in the same plane; further comprising a left pressing sleeve (3) detachably and fixedly arranged on the left pressing claw (11) and a right pressing sleeve (4) detachably and fixedly arranged on the right pressing claw (21); the left pressing sleeve (3) and the right pressing sleeve (4) are both flexible pressing sleeves and are used for pressing the cloth; The left pressing foot (1) comprises a left pressing rod (13) and a left pressing claw (11) integrally arranged at one end of the left pressing rod (13), and the right pressing foot (2) comprises a right pressing rod (23) and a right pressing claw (21) integrally arranged at one end of the right pressing rod (23); The left pressing sleeve (3) comprises a left pressing plate (31) and at least one group of left buckle assemblies buckled with the left pressing claw (11), and the right pressing sleeve (4) comprises a right pressing plate (41) and at least one group of right buckle assemblies buckled with the right pressing claw (21).

2. The presser foot assembly of claim 1, wherein The left pressing claw (11) comprises a first left pressing plate (111), a second left pressing plate (112) and a third left pressing plate (113), which are sequentially connected to form a left pressing groove (12), and the left pressing groove (12) is a U-shaped structure; wherein the first left pressing plate (111) is connected with the left pressing rod (13) of the left pressing foot (1), and the first left pressing plate (111) and the third left pressing plate (113) are parallel to each other and are both connected perpendicularly with the second left pressing plate (112); The right pressing claw (21) comprises a first right pressing plate (211), a second right pressing plate (212) and a third right pressing plate (213), which are sequentially connected to form a right pressing groove (22), and the right pressing groove (22) is a U-shaped structure, and the left pressing groove (12) and the right pressing groove (22) are oppositely open; wherein the first right pressing plate (211) is connected with the right pressing rod (23) of the right pressing foot (2), and the first right pressing plate (211) and the third right pressing plate (213) are parallel to each other and are both connected perpendicularly with the second right pressing plate (212).

3. The presser foot assembly of claim 2, wherein, The left buckle assembly comprises a first left buckle (32) buckled with one side of the first left pressing plate (111) facing the left pressing groove (12), a second left buckle (33) buckled with one side of the second left pressing plate (112) away from the left pressing groove (12), a third left buckle (34) buckled with one side of the third left pressing plate (113) facing the left pressing groove (12), a second left clamping plate (35) abutting one side of the second left pressing plate (112) facing the left pressing groove (12), and a third left clamping plate (36) abutting one side of the third left pressing plate (113) away from the left pressing groove (12). The right buckle assembly comprises a first right buckle (42) buckled with one side of the first right pressing plate (211) facing the right pressing groove (22), a second right buckle (43) buckled with one side of the second right pressing plate (212) away from the right pressing groove (22), a third right buckle (44) buckled with one side of the third right pressing plate (213) facing the right pressing groove (22), a second right clamping plate (45) abutting one side of the second right pressing plate (212) facing the right pressing groove (22), and a third right clamping plate (46) abutting one side of the third right pressing plate (213) away from the right pressing groove (22).

4. The presser foot assembly according to any one of claims 1 to 3, wherein The bottom of the left pressing claw (11) and the right pressing claw (21) is provided with a pressing convex (5).

5. The presser foot assembly of claim 4, wherein The left pressing sleeve (3) is provided with a left buffer pad on one side facing the left pressing claw (11), and the right pressing sleeve (4) is provided with a right buffer pad on one side facing the left pressing claw (11).

6. The presser foot assembly of claim 4, wherein The bottom of the left pressing sleeve (3) and the right pressing sleeve (4) is provided with an anti-skid convex (6).

7. The presser foot assembly of claim 2, wherein The left pressing sleeve (3) is provided with a left U-shaped groove (37), and the right pressing sleeve (4) is provided with a right U-shaped groove (47); the left U-shaped groove (37) and the right U-shaped groove (47) are oppositely open.

8. The presser foot assembly of claim 7, wherein, One side groove of the left U-shaped groove (37) is formed with a left U-shaped blocking strip (38) abutting the inner side of the left pressing groove (12); one side groove of the right U-shaped groove (47) is formed with a right U-shaped blocking strip (48) abutting the inner side of the right pressing groove (22).

9. A sewing machine characterized by comprising: The foot assembly comprises the foot assembly of any one of claims 1 to 8.

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