Presser bar assembly for a sewing machine and sewing machine

Abstract

This utility model discloses a presser frame assembly for a sewing machine and a sewing machine, relating to the field of sewing machine technology. The presser frame assembly includes a fixed frame, a first presser plate connected to the fixed frame, a second presser plate connected to the fixed frame, a first support plate disposed on top of the first presser plate, a second support plate disposed on top of the second presser plate, a first presser frame connected to the first presser plate and movable above the first support plate, and a second presser frame connected to the second presser plate and movable above the second support plate. The first presser frame is used to press the fabric located above the first support plate, and the second presser frame is used to press the fabric located above the second support plate, for the needle to sew the fabric between the first and second support plates. At least one of the first and second presser plates can move relative to the fixed frame to increase the distance between the first and second support plates, thereby tautling the fabric when the needle passes through it. This reduces the bounce of the fabric as it moves with the needle during sewing.

Description

Technical Field

[0001] This utility model relates to the field of sewing machine technology, and in particular to a sewing machine frame assembly and a sewing machine. Background Technology

[0002] During the needle-piercing process of a sewing machine, the fabric needs to be pressed firmly before sewing to prevent it from jumping around with the needle and failing to form a stable stitch. In related technologies, when the fabric is placed within the presser foot, it is pressed down to tighten the fabric. However, with elastic or soft fabrics, the fabric within the presser foot remains relatively loose, failing to effectively address the issue of fabric floating up and down with the needle.

[0003] Therefore, how to reduce the movement of fabric as it follows the needle during sewing, thereby improving stitch instability and skipped stitches, is a technical problem that needs to be solved by those skilled in the art. Utility Model Content

[0004] The purpose of this invention is to provide a presser assembly for a sewing machine and a sewing machine that can reduce the jumping of the fabric as it moves with the needle during sewing, thereby improving the stability of the stitches and the phenomenon of skipped stitches.

[0005] To achieve the above objectives, this utility model provides a presser frame assembly for a sewing machine, including a fixed frame, a first presser plate connected to the fixed frame, a second presser plate connected to the fixed frame, a first support plate disposed on top of the first presser plate, a second support plate disposed on top of the second presser plate, a first presser frame connected to the first presser plate and movable above the first support plate, and a second presser frame connected to the second presser plate and movable above the second support plate; the first presser frame is used to press the fabric located above the first support plate, and the second presser frame is used to press the fabric located above the second support plate, for the needle to sew the fabric between the first support plate and the second support plate; at least one of the first presser plate and the second presser plate can move relative to the fixed frame to increase the distance between the first support plate and the second support plate, for tightening the fabric when the needle passes through the fabric.

[0006] In one possible implementation, the first support plate is located at one end of the first pressing plate near the second pressing plate, and a first clearance groove is provided at the end of the first support plate near the second pressing plate. The first clearance groove is used to avoid the needle.

[0007] The second support plate is located at the end of the second pressure plate that is close to the first pressure plate, and the end of the second support plate that is close to the first pressure plate has a second clearance groove corresponding to the first clearance groove. The second clearance groove is used to avoid the machine needle.

[0008] In one possible implementation, the first pressure frame is located at one end of the first support plate near the second support plate, and the end of the first pressure frame near the second support plate is provided with a third clearance groove corresponding to the first clearance groove. The third clearance groove is used to clear the machine needle.

[0009] The second pressure frame is located at the end of the second support plate near the first support plate, and the end of the second pressure frame near the first support plate is provided with a fourth clearance groove corresponding to the second clearance groove. The fourth clearance groove is used to avoid the machine needle.

[0010] In one possible implementation, the top surface of the first tray is provided with a first anti-slip structure for contacting the bottom surface of the fabric;

[0011] The top surface of the second tray is provided with a second anti-slip structure for contacting the bottom surface of the fabric.

[0012] In one possible implementation, the bottom surface of the first pressure frame is provided with a plurality of first protrusions for contacting the top surface of the fabric.

[0013] The bottom surface of the second pressure frame is provided with several second protrusions for contacting the top surface of the fabric.

[0014] In one possible implementation, the cross-sectional dimensions of the first protrusion and the second protrusion perpendicular to the height direction decrease sequentially from top to bottom, and the bottom of the first protrusion and the second protrusion are provided with a planar structure for fitting with the top surface of the fabric.

[0015] In one possible implementation, the first pressure frame includes a first connecting part and a first pressing part connected to each other. The first connecting part is movably connected to the first pressing plate by a first driving member. The first driving member can drive the first connecting part to move toward the first support plate so that the first pressing part presses the fabric. The first driving member can also drive the first connecting part to move away from the first support plate so that the first pressing part releases the fabric.

[0016] The second pressure frame includes a second connecting part and a second pressing part connected together. The second connecting part is movably connected to the second pressing plate through a second driving member. The second driving member can drive the second connecting part to move toward the second support plate so that the second pressing part presses the fabric. The second driving member can also drive the second connecting part to move away from the second support plate so that the second pressing part releases the fabric.

[0017] In one possible implementation, the first pressing plate is provided with a first connecting hole, and the first support plate is provided with a second connecting hole. The second connecting hole corresponds to the first connecting hole one by one, and the first connecting member is connected to the corresponding second connecting hole and the first connecting hole so that the first pressing plate and the first support plate are relatively fixed.

[0018] In one possible implementation, the second pressing plate is provided with a third connecting hole, and the second support plate is provided with a fourth connecting hole. The fourth connecting hole corresponds to the third connecting hole one by one, and the second connecting member is connected to the corresponding fourth connecting hole and the third connecting hole so that the second pressing plate and the second support plate are relatively fixed.

[0019] Based on the above, this application also provides a sewing machine, including a presser assembly of the sewing machine as described in any of the above claims.

[0020] Compared with the prior art, the technical solution provided by this utility model has at least the following beneficial effects: when the first pressure frame presses the fabric above the first support plate, the first pressure frame and the first support plate clamp the fabric; when the second pressure frame presses the fabric above the second support plate, the second pressure frame and the second support plate clamp the fabric, thereby fixing the fabric located on both sides of the needle. Driving at least one of the first pressure plate and the second pressure plate to move relative to the fixing frame increases the distance between the first support plate and the second support plate, so that the fabric clamped between the first pressure frame and the first support plate is far away from the fabric clamped between the second pressure frame and the second support plate, thereby making the fabric located between the clamped fabric taut, that is, making the fabric between the first support plate and the second support plate taut, reducing the jumping of the fabric following the movement of the needle during sewing, thereby improving the instability of the stitch and the skipped stitch phenomenon. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the presser frame assembly of the sewing machine provided in an embodiment of the present utility model.

[0023] Figure 2 for Figure 1 A magnified view of a portion of point A in the middle.

[0024] in:

[0025] 100 - Fixed frame, 110 - First driving component, 120 - Second driving component;

[0026] 200 - First pressing board;

[0027] 300 - Second pressing plate;

[0028] 400 - First pallet, 410 - First clearance groove;

[0029] 500 - Second pallet, 510 - Second clearance groove;

[0030] 600 - First pressure frame, 610 - Third clearance groove, 620 - First protrusion, 630 - First connecting part, 640 - First pressing part;

[0031] 700 - Second pressure frame, 710 - Fourth clearance groove, 720 - Second protrusion, 730 - Second connecting part, 740 - Second pressing part;

[0032] 800 - First connector;

[0033] 900 - Second connector. Detailed Implementation

[0034] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0035] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0036] In the description of this utility model, it should be understood that the terms "upper" and "lower" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the position or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations of this utility model.

[0037] The purpose of this invention is to provide a presser assembly for a sewing machine and a sewing machine that can reduce the jumping of the fabric as it moves with the needle during sewing, thereby improving the stability of the stitches and the phenomenon of skipped stitches.

[0038] Please see Figure 1 and Figure 2To achieve the above objectives, this utility model provides a presser frame assembly for a sewing machine, including a fixed frame 100, a first presser plate 200 connected to the fixed frame 100, a second presser plate 300 connected to the fixed frame 100, a first support plate 400 disposed on the top of the first presser plate 200, a second support plate 500 disposed on the top of the second presser plate 300, a first presser frame 600 connected to the first presser plate 200 and movable above the first support plate 400, and a presser frame 600 connected to the second presser plate 300 and movable above the second support plate 400. A second pressure frame 700 moves above plate 500; a first pressure frame 600 is used to press the fabric above the first support plate 400, and a second pressure frame 700 is used to press the fabric above the second support plate 500, for the needle to sew the fabric between the first support plate 400 and the second support plate 500, at least one of the first pressure plate 200 and the second pressure plate 300 can move relative to the fixing frame 100 to increase the distance between the first support plate 400 and the second support plate 500, for tightening the fabric when the needle passes through the fabric.

[0039] It is understood that at least one of the first pressing plate 200 and the second pressing plate 300 can move relative to the fixing frame 100 to increase the distance between the first support plate 400 and the second support plate 500. Specifically, this includes the following three cases: only the first pressing plate 200 moves relative to the fixing frame 100 to increase the distance between the first support plate 400 and the second support plate 500; only the second pressing plate 300 moves relative to the fixing frame 100 to increase the distance between the first support plate 400 and the second support plate 500; and both the first pressing plate 200 and the second pressing plate 300 move relative to the fixing frame 100 to increase the distance between the first support plate 400 and the second support plate 500. The directions in which the first pressing plate 200 and / or the second pressing plate 300 move relative to the fixing frame 100 are the directions in which the first pressing plate 200 and the second pressing plate 300 face each other and are opposite to each other.

[0040] When the first pressure frame 600 presses the fabric above the first support plate 400, the first pressure frame 600 and the first support plate 400 clamp the fabric. When the second pressure frame 700 presses the fabric above the second support plate 500, the second pressure frame 700 and the second support plate 500 clamp the fabric, thereby fixing the fabric located on both sides of the needle. Driving at least one of the first pressure plate 200 and the second pressure plate 300 to move relative to the fixing frame 100 increases the distance between the first support plate 400 and the second support plate 500, so that the fabric clamped between the first pressure frame 600 and the first support plate 400 is far away from the fabric clamped between the second pressure frame 700 and the second support plate 500, thereby making the fabric located between the clamped fabric taut, that is, making the fabric between the first support plate 400 and the second support plate 500 taut, reducing the jumping of the fabric following the movement of the needle during sewing, thereby improving the instability of the stitch and the phenomenon of skipped stitches.

[0041] It should be noted that the presser frame assembly of the sewing machine in this embodiment can easily handle various fabrics, including knitted elastic fabrics, woven fabrics, and down jackets, without the need for additional auxiliary presser feet to tighten the fabric. By moving the positions of the first presser frame 600 and the first support plate 400 and / or the second presser frame 700 and the second support plate 500, the fabric is tightened before sewing. Its structure is simple and has a wide range of fabric sewing adaptability.

[0042] In one possible implementation, the first pressing plate 200 has a first groove at one end facing the second pressing plate 300, the first groove penetrating the first pressing plate 200 in the height direction. The second pressing plate 300 has a second groove at one end facing the first pressing plate 200, the second groove penetrating the second pressing plate 300 in the height direction. The first support plate 400 is located at one end of the first pressing plate 200 near the second pressing plate 300, and the first support plate 400 near the second pressing plate 300 has a first clearance groove 410 for avoiding the needle. The second support plate 500 is located at one end of the second pressing plate 300 near the first pressing plate 200, and the second support plate 500 near the first pressing plate 200 has a second clearance groove 510 corresponding to the first clearance groove 410 for avoiding the needle. The first clearance groove 410 is located above the first groove body, and the second clearance groove 510 is located above the second groove body. The first clearance groove 410 and the second clearance groove 510 together form the sewing area. It should be noted that the shape of the sewing area can be adjusted by the shape of the first clearance groove 410 and the second clearance groove 510. In this embodiment, it is preferable that the width of the first clearance groove 410 and the second clearance groove 510 in the direction in which the first pressure plate 200 and / or the second pressure plate 300 moves relative to the fixing frame 100 is smaller than the width of the first clearance groove 410 and the second clearance groove 510 in the direction perpendicular to the direction in which the first pressure plate 200 and / or the second pressure plate 300 moves relative to the fixing frame 100.

[0043] In one possible implementation, the first pressure frame 600 is located at the end of the first support plate 400 near the second support plate 500, and the end of the first pressure frame 600 near the second support plate 500 is provided with a third clearance groove 610 corresponding to the first clearance groove 410, the third clearance groove 610 being used to avoid the machine needle; the second pressure frame 700 is located at the end of the second support plate 500 near the first support plate 400, and the end of the second pressure frame 700 near the first support plate 400 is provided with a fourth clearance groove 710 corresponding to the second clearance groove 510, the fourth clearance groove 710 being used to avoid the machine needle. The third clearance groove 610 is located above the first clearance groove 410, and the shape and size of the third clearance groove 610 are similar to those of the first clearance groove 410. The fourth clearance groove 710 is located above the second clearance groove 510, and the shape and size of the fourth clearance groove 710 are similar to those of the second clearance groove 510, so as to avoid obstructing the first clearance groove 410 and the second clearance groove 510.

[0044] In one possible implementation, the top surface of the first tray 400 is provided with a first anti-slip structure for contacting the bottom surface of the fabric. The first anti-slip structure can be, but is not limited to, raised dots, anti-slip textures, etc., and is used to increase the friction between the top surface of the first tray 400 and the bottom surface of the fabric, preventing the fabric from slipping during the movement of the first tray 400 with the first pressing plate 200. Similarly, the top surface of the second tray 500 is provided with a second anti-slip structure for contacting the bottom surface of the fabric. The second anti-slip structure can be, but is not limited to, raised dots, anti-slip textures, etc., and is used to increase the friction between the top surface of the second tray 500 and the bottom surface of the fabric, preventing the fabric from slipping during the movement of the second tray 500 with the second pressing plate 300.

[0045] In one possible implementation, the bottom surface of the first pressing frame 600 is provided with a plurality of first protrusions 620 for contacting the top surface of the fabric; the bottom surface of the second pressing frame 700 is provided with a plurality of second protrusions 720 for contacting the top surface of the fabric. The cross-sectional dimensions of the first protrusions 620 and the second protrusions 720 perpendicular to the height direction decrease sequentially from top to bottom, and the bottom of the first protrusions 620 and the second protrusions 720 are provided with a planar structure for fitting against the top surface of the fabric, so as to improve the pressing effect of the first protrusions 620 and the second protrusions 720 on the top surface of the fabric.

[0046] In one possible implementation, the first pressure frame 600 includes a first connecting portion 630 and a first pressing portion 640 connected together. The first connecting portion 630 is movably connected to the first pressing plate 200 via a first driving member 110. The first driving member 110 can drive the first connecting portion 630 to move toward the first support plate 400 so that the first pressing portion 640 presses the fabric. The first driving member 110 can also drive the first connecting portion 630 to move away from the first support plate 400 so that the first pressing portion 640 releases the fabric. The movement of the first connecting portion 630 can be, but is not limited to, translation and rotation. For example, the first driving member 110 can be a cylinder, and the cylinder body of the cylinder... The first connecting part 630 is moved horizontally in the height direction by the piston rod of the cylinder and fixed to the first pressing plate 200 by the frame. The first driving member 110 can also be a rotating arm, and the first connecting part 630 is rotatably connected to the rotating arm. The rotation of the rotating arm causes the first connecting part 630 to approach the first support plate 400. After the first pressing part 640 contacts the fabric, the first connecting part 630 rotates relative to the rotating arm to adjust the posture of the first pressing frame 600 to press the fabric. When the first driving member 110 is a rotating arm, damping can be set at the connection between the first connecting part 630 and the rotating arm to prevent the first connecting part 630 from being too flexible and difficult to control.

[0047] Similarly, the second pressure frame 700 includes a second connecting part 730 and a second pressing part 740 connected together. The second connecting part 730 is movably connected to the second pressing plate 300 through the second driving member 120. The second driving member 120 can drive the second connecting part 730 to move toward the second support plate 500 so that the second pressing part 740 presses the fabric. The second driving member 120 can also drive the second connecting part 730 to move away from the second support plate 500 so that the second pressing part 740 releases the fabric. The movement of the second connecting part 730 can be, but is not limited to, translation and rotation. For example, the second driving member 120 can be a cylinder, the cylinder body of which is fixed to the second pressing plate 300 via a frame, and the piston rod of the cylinder drives the second connecting part 730 to translate in the height direction. The second driving member 120 can also be a rotating arm, and the second connecting part 730 is rotatably connected to the rotating arm. By rotating the rotating arm, the second connecting part 730 moves closer to the second support plate 500, and after the second pressing part 740 contacts the fabric, the second connecting part 730 rotates relative to the rotating arm to adjust the posture of the second pressing frame 700 to press the fabric. When the second driving member 120 is a rotating arm, damping can be provided at the connection between the second connecting part 730 and the rotating arm to prevent the second connecting part 730 from being too flexible and difficult to control.

[0048] In one possible implementation, the first pressing plate 200 has a first connecting hole, and the first support plate 400 has a second connecting hole, with each second connecting hole corresponding to one of the first connecting holes. A first connecting member 800 connects to the corresponding second and first connecting holes to fix the first pressing plate 200 and the first support plate 400 relatively. The number of second and first connecting holes can be adjusted according to actual needs, but should be at least two. The second and first connecting holes can be, but are not limited to, threaded holes, and the first connecting member 800 can be, but is not limited to, studs or screws.

[0049] In one possible implementation, the second pressing plate 300 has a third connecting hole, and the second support plate 500 has a fourth connecting hole. The fourth connecting hole corresponds one-to-one with the third connecting hole. The second connecting member 900 connects to the corresponding fourth and third connecting holes to fix the second pressing plate 300 and the second support plate 500 relative to each other. The number of fourth and third connecting holes can be adjusted according to actual needs, but should be at least two. The fourth and third connecting holes can be, but are not limited to, threaded holes, and the first connecting member 800 can be, but is not limited to, studs or screws.

[0050] Based on the above, this application also provides a sewing machine, including a presser assembly as described in any of the above claims. This sewing machine also possesses all the beneficial effects of the presser assembly described above. The remaining structure of the sewing machine can be referred to the prior art, and will not be described in detail here.

[0051] 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.

[0052] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0053] 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 this utility model.

Claims

1. A presser bar assembly for a sewing machine, comprising: It includes a fixed frame (100), a first pressing plate (200) connected to the fixed frame (100), a second pressing plate (300) connected to the fixed frame (100), a first support plate (400) disposed on the top of the first pressing plate (200), a second support plate (500) disposed on the top of the second pressing plate (300), a first pressing frame (600) connected to the first pressing plate (200) and movable above the first support plate (400), and a second pressing frame (700) connected to the second pressing plate (300) and movable above the second support plate (500). The first pressure frame (600) is used to press the fabric above the first support plate (400), and the second pressure frame (700) is used to press the fabric above the second support plate (500) for the needle to sew the fabric between the first support plate (400) and the second support plate (500). At least one of the first pressure plate (200) and the second pressure plate (300) can move relative to the fixing frame (100) to increase the distance between the first support plate (400) and the second support plate (500) for tautening the fabric when the needle passes through it.

2. The press frame assembly of claim 1, wherein, The first support plate (400) is located at the end of the first pressing plate (200) near the second pressing plate (300), and the first support plate (400) near the end of the second pressing plate (300) is provided with a first clearance groove (410), which is used to avoid the machine needle; The second support plate (500) is located at the end of the second pressure plate (300) near the first pressure plate (200), and the end of the second support plate (500) near the first pressure plate (200) is provided with a second clearance groove (510) corresponding to the first clearance groove (410), and the second clearance groove (510) is used to avoid the needle.

3. The frame pressing assembly according to claim 2, characterized in that, The first pressure frame (600) is located at one end of the first tray (400) near the second tray (500), and the first pressure frame (600) near the second tray (500) is provided with a third clearance groove (610) corresponding to the first clearance groove (410), and the third clearance groove (610) is used to avoid the machine needle; The second pressure frame (700) is located at one end of the second tray (500) near the first tray (400), and the second pressure frame (700) near the first tray (400) is provided with a fourth clearance groove (710) corresponding to the second clearance groove (510), the fourth clearance groove (710) being used to avoid the needle.

4. The press frame assembly of claim 1, wherein, The top surface of the first tray (400) is provided with a first anti-slip structure for contacting the bottom surface of the fabric; The top surface of the second tray (500) is provided with a second anti-slip structure for contacting the bottom surface of the fabric.

5. The press frame assembly of claim 1, wherein, The bottom surface of the first pressure frame (600) is provided with a plurality of first protrusions (620) for contacting the top surface of the fabric. The bottom surface of the second pressure frame (700) is provided with a plurality of second protrusions (720) for contacting the top surface of the fabric.

6. The press frame assembly of claim 5, wherein, The cross-sectional dimensions of the first protrusion (620) and the second protrusion (720) perpendicular to the height direction decrease sequentially from top to bottom, and the bottom of the first protrusion (620) and the second protrusion (720) are provided with a planar structure for fitting with the top surface of the fabric.

7. The press frame assembly of any of claims 1-6, wherein, The first pressure frame (600) includes a first connecting part (630) and a first pressing part (640) connected to each other. The first connecting part (630) is movably connected to the first pressing plate (200) via a first driving member (110). The first driving member (110) can drive the first connecting part (630) to move toward the first support plate (400) so that the first pressing part (640) presses the fabric. The first driving member (110) can also drive the first connecting part (630) to move away from the first support plate (400) so that the first pressing part (640) releases the fabric. The second pressure frame (700) includes a second connecting part (730) and a second pressing part (740) connected to each other. The second connecting part (730) is movably connected to the second pressing plate (300) via a second driving member (120). The second driving member (120) can drive the second connecting part (730) to move toward the second support plate (500) so that the second pressing part (740) presses the fabric. The second driving member (120) can also drive the second connecting part (730) to move away from the second support plate (500) so that the second pressing part (740) releases the fabric.

8. The press frame assembly of any one of claims 1-6, wherein, The first pressing plate (200) is provided with a first connecting hole, and the first support plate (400) is provided with a second connecting hole. The second connecting hole corresponds to the first connecting hole one by one. The first connecting piece (800) is connected to the corresponding second connecting hole and the first connecting hole so that the first pressing plate (200) and the first support plate (400) are relatively fixed.

9. The frame assembly according to any one of claims 1-6, characterized in that, The second pressing plate (300) is provided with a third connecting hole, and the second support plate (500) is provided with a fourth connecting hole. The fourth connecting hole corresponds to the third connecting hole one by one. The second connecting piece (900) is connected to the corresponding fourth connecting hole and the third connecting hole so that the second pressing plate (300) and the second support plate (500) are relatively fixed.

10. A sewing machine, characterized in that, Includes the presser assembly of a sewing machine as described in any one of claims 1-9.

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