Self-adapting sewing machine presser bar

Abstract

The utility model belongs to sewing machine field, concretely is a kind of self-adaptive sewing machine pressure bar, including sewing machine main body, the inside sliding connection of sewing machine main body has top rod, the surface of top rod is slidably equipped with first spring, and one end of first spring is fixedly connected with the inner wall of sewing machine main body, the surface of top rod is provided with limit component, and the one end of top rod is provided with thread groove;By setting limit component, top rod and pressure bar main body can be supported and limited, and after rotating limit frame, the support of first spring is used to make that pressure bar main body and presser foot can play the role of pressure holding cloth, and when the height of presser foot needs to be adjusted, top rod is rotated, the rotation of top rod makes that thread groove drives screw rod longitudinal movement, and screw rod drives pressure bar main body longitudinal movement, to reach the effect of adjusting the height of presser foot, make presser foot more convenient and fast when adjusting use height, to adapt to thicker cloth.

Description

Technical Field

[0001] This utility model relates to the field of sewing machines, specifically an adaptive sewing machine pressure bar. Background Technology

[0002] The presser bar of a sewing machine is the core component that controls the pressure of the fabric during the sewing process. It is usually located below the machine head and adjusts the vertical pressure of the presser foot on the fabric through a spring or lever mechanism to ensure that the fabric is flat and fits the feed dog and moves evenly. Its adjustable pressure function can adapt to materials of different thicknesses, thereby ensuring stable stitches and preventing fabric slippage or wrinkling.

[0003] Currently, existing sewing machine presser bars can adapt to the pressing of fabrics of different thicknesses through spring support. However, the presser bar limiting structure restricts the maximum lifting height of the presser foot, making it difficult to meet the sewing needs of thicker fabrics. Moreover, adjusting the maximum lifting height of the presser foot is very inconvenient, thus affecting the use of the sewing machine. Therefore, an adaptive sewing machine presser bar is proposed to address the above problems. Utility Model Content

[0004] To overcome the shortcomings of existing technologies, the presser bar limiting structure of existing sewing machines restricts the maximum lifting height of the presser foot, making it difficult to meet the sewing needs of thicker fabrics. Moreover, adjusting the maximum lifting height of the presser foot is very inconvenient, thus affecting the use of the sewing machine. This utility model proposes an adaptive sewing machine presser bar.

[0005] The technical solution adopted by this utility model to solve its technical problem is: an adaptive sewing machine pressure bar, including a sewing machine body, a top rod slidably connected inside the sewing machine body, a first spring slidably sleeved on the surface of the top rod, one end of the first spring being fixedly connected to the inner wall of the sewing machine body, a limit component being provided on the surface of the top rod, a threaded groove being opened at one end of the top rod, a screw being threadedly connected inside the threaded groove, a pressure bar body being fixedly connected at one end of the screw, a second spring being fixedly connected to the top of the pressure bar body, one end of the second spring being fixedly connected to the bottom of the top rod, a positioning sleeve slidably sleeved on the surface of the pressure bar body, the surface of the positioning sleeve engaging with the inner wall of the sewing machine body, and a pressure foot being provided at one end of the pressure bar body; The limiting component includes a support plate and a limiting plate, which are respectively sleeved on both sides of the pressure bar body. A connecting component is provided at the bottom of the support plate and the limiting plate. A limiting frame is rotatably installed on one side of the sewing machine body, and the limiting frame works in conjunction with the support plate.

[0006] Preferably, the inner cavities of the support plate and the limiting plate are fixedly installed with a locking plate, and the surface of the pressure rod body is provided with a locking groove, and the locking plate is used in conjunction with the locking groove.

[0007] Preferably, a bracket is fixedly installed on the inner wall of the sewing machine body, and a limit rod is fixedly installed inside the bracket, with the support plate slidably sleeved on the surface of the limit rod.

[0008] Preferably, the connecting assembly includes a connecting frame, and the bottom of both the support plate and the limiting plate are fixedly installed with connecting frames. A first bolt passes through the interior of both connecting frames, and a first nut is threaded onto one end of the first bolt.

[0009] Preferably, a limiting block is fixedly installed in the inner cavity of the positioning sleeve, and a limiting groove is formed on the surface of the pressure rod body, with the inner cavity of the limiting groove slidingly connected to the surface of the limiting block.

[0010] Preferably, a positioning block is fixedly installed on the surface of the positioning sleeve, and a positioning groove is provided in the inner cavity of the sewing machine body, with the positioning block and the positioning groove working together.

[0011] Preferably, a connecting post is fixedly connected to the top of the presser foot, a second bolt passes through one side of the connecting post, one end of the second bolt passes through the main body of the presser rod, and a second nut is threaded onto one end of the second bolt, which is used in conjunction with the main body of the presser rod.

[0012] The advantages of this utility model are: 1. This utility model, by setting a limiting component, can support and limit the main body of the top rod and the pressure rod. After rotating the limiting frame, the pressure rod body and the pressure foot can hold the fabric through the support of the first spring. When it is necessary to adjust the height of the pressure foot, the top rod is rotated. The rotation of the top rod causes the threaded groove to drive the screw to move longitudinally. The screw drives the pressure rod body to move longitudinally, thereby achieving the function of adjusting the height of the pressure foot. This makes it more convenient and quick to adjust the height of the pressure foot to accommodate thicker fabrics. 2. By setting a positioning sleeve, this utility model can stabilize the position of the pressure rod body when rotating the top rod, so that the pressure rod body can only move longitudinally, thereby preventing the screw from rotating with the thread groove and thus preventing the height of the pressure rod body from being unable to be adjusted, thereby avoiding affecting the adjustment of the pressure foot height. Attached Figure Description

[0013] 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 some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1This is a schematic diagram of the adaptive sewing machine pressure bar structure of this utility model; Figure 2 This is a cross-sectional structural diagram of the present invention; Figure 3 This is a schematic diagram of the top rod structure of this utility model; Figure 4 This is a schematic diagram of the limiting component structure of this utility model; Figure 5 This is a schematic diagram of the positioning sleeve structure of this utility model; Figure 6 This utility model Figure 5 A magnified structural diagram of part A; Figure 7 This is a schematic diagram of the main structure of the pressure bar of this utility model; Figure 8 This utility model Figure 7 A magnified structural diagram of part B.

[0015] In the diagram: 1. Sewing machine body; 2. Top rod; 21. First spring; 3. Limiting assembly; 31. Support plate; 3101. Bracket; 3102. Limiting rod; 32. Limiting plate; 33. Connecting assembly; 3301. Connecting frame; 3302. First bolt; 3303. First nut; 34. Limiting frame; 35. Clamping plate; 36. Clamping groove; 4. Pressing rod body; 41. Screw; 42. Threaded groove; 43. Second spring; 5. Positioning sleeve; 51. Limiting block; 52. Limiting groove; 53. Positioning block; 54. Positioning groove; 6. Presser foot; 61. Connecting column; 62. Second bolt; 63. Second nut. Detailed Implementation

[0016] 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 scope of protection of the present utility model.

[0017] The following is in conjunction with the appendix Figure 1-8 This application will be described in further detail. This application discloses an adaptive sewing machine pressure bar. (Refer to...) Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 7An adaptive sewing machine pressure bar includes a sewing machine body 1, a top rod 2 slidably connected inside the sewing machine body 1, a first spring 21 slidably sleeved on the surface of the top rod 2, one end of the first spring 21 being fixedly connected to the inner wall of the sewing machine body 1, a limit component 3 provided on the surface of the top rod 2, a threaded groove 42 opened at one end of the top rod 2, a screw 41 threadedly connected inside the threaded groove 42, a pressure bar body 4 fixedly connected at one end of the screw 41, a second spring 43 fixedly connected to the top of the pressure bar body 4, one end of the second spring 43 being fixedly connected to the bottom of the top rod 2, a positioning sleeve 5 slidably sleeved on the surface of the pressure bar body 4, the surface of the positioning sleeve 5 engaging with the inner wall of the sewing machine body 1, and a presser foot 6 provided at one end of the pressure bar body 4; wherein, the sewing machine body 1 is composed of a machine head, machine base, base frame, hand crank or motor, needle, bobbin, cutter, etc., which belongs to the prior art and will not be described in detail here; The limiting component 3 includes a support plate 31 and a limiting plate 32. The support plate 31 and the limiting plate 32 are respectively sleeved on both sides of the pressure bar body 4. The bottom of the support plate 31 and the limiting plate 32 are jointly provided with a connecting component 33. A limiting frame 34 is rotatably installed on one side of the sewing machine body 1. The limiting frame 34 is used in conjunction with the support plate 31. After rotating the limiting frame 34 so that it no longer supports the position of the support plate 31, the first spring 21 drives the top rod 2 to move downward through the support of the first spring 21. The top rod 2 drives the pressure rod body 4 to move downward through the threaded sleeve and the screw 41. The pressure rod body 4 drives the pressure foot 6 to move downward so that the pressure foot 6 can hold the fabric. When it is necessary to adjust the height of the pressure foot 6 according to a thicker fabric, the top rod 2 is rotated and the position of the pressure rod body 4 is stabilized by the positioning sleeve 5 so that the screw 41 moves longitudinally inside the threaded groove 42, thereby adjusting the position of the pressure rod body 4 and thus adjusting the height of the pressure foot 6.

[0018] Reference Figure 7 and Figure 8 The inner cavities of the support plate 31 and the limiting plate 32 are both fixedly installed with a clamping plate 35. The surface of the pressure rod body 4 is provided with a clamping groove 36. The clamping plate 35 and the clamping groove 36 are used together. By using the clamping plate 35 and the clamping groove 36 together, the connection position of the support plate 31, the limiting plate 32 and the top rod 2 is stabilized through the clamping plate 35 and the clamping groove 36, so that the first spring 21 can support the top rod 2 through the support plate 31 and the top plate.

[0019] Reference Figure 4 and Figure 7A bracket 3101 is fixedly installed on the inner wall of the sewing machine body 1. A limiting rod 3102 is fixedly installed inside the bracket 3101. The support plate 31 is slidably sleeved on the surface of the limiting rod 3102. The position of the limiting rod 3102 is stabilized by the limiting frame 34, and the position of the supporting plate 31 is stabilized by the limiting rod 3102, so as to avoid the supporting plate 31 from being unable to cooperate with the limiting frame 34 due to positional deviation.

[0020] Reference Figure 5 and Figure 6 The connecting assembly 33 includes a connecting frame 3301. The bottom of the support plate 31 and the limiting plate 32 are all fixedly installed with the connecting frame 3301. The two connecting frames 3301 are connected by a first bolt 3302. One end of the first bolt 3302 is threaded with a first nut 3303. By passing one end of the first bolt 3302 through the two connecting frames 3301 and threading the first nut 3303 to one end of the first bolt 3302, the two connecting frames 3301 are connected by the first bolt 3302 and the first nut 3303, thereby achieving the function of connecting the limiting plate 32 and the support plate 31, so that the first spring 21 can support the top rod 2 through the limiting plate 32 and the support plate 31.

[0021] Reference Figure 5 The positioning sleeve 5 has a fixedly installed limiting block 51 in its inner cavity, and a limiting groove 52 is opened on the surface of the pressure rod body 4. The inner cavity of the limiting groove 52 is slidably connected to the surface of the limiting block 51. By setting the limiting block 51 inside the positioning sleeve 5 and making the surface of the limiting block 51 slidably connected to the inner cavity of the limiting groove 52, the positioning sleeve 5 can effectively stabilize the position of the pressure rod body 4 through the limiting block 51 and the limiting groove 52, so as to avoid the pressure rod body 4 from rotating with the top rod 2 and being unable to adjust the height of the pressure foot 6.

[0022] Reference Figure 5 A positioning block 53 is fixedly installed on the surface of the positioning sleeve 5, and a positioning groove 54 is opened in the inner cavity of the sewing machine body 1. The positioning block 53 and the positioning groove 54 are used in conjunction. By inserting the positioning block 53 into the interior of the positioning groove 54, the sewing machine body 1 can effectively stabilize the position of the positioning sleeve 5 through the positioning block 53 and the positioning groove 54, so as to avoid the positioning sleeve 5 from rotating and affecting the support of the pressure rod body 4, thereby ensuring that the pressure rod body 4 can only move longitudinally.

[0023] Reference Figure 3A connecting post 61 is fixedly connected to the top of the pressure foot 6. A second bolt 62 passes through one side of the connecting post 61. One end of the second bolt 62 passes through the pressure rod body 4. A second nut 63 is threaded onto one end of the second bolt 62. The second nut 63 is used in conjunction with the pressure rod body 4. By connecting the connecting post 61 and the pressure rod body 4, and by making one end of the second bolt 62 pass through the connecting post 61 and the pressure rod body 4, and by threading the second nut 63 onto one end of the second bolt 62, the connection between the connecting post 61 and the pressure rod body 4 is completed, thereby completing the installation of the pressure foot 6.

[0024] Working principle: When the presser foot 6 needs to hold the fabric, the limiting frame 34 is rotated, so that the limiting frame 34 no longer supports the position of the support plate 31. The position of the support plate 31 is stabilized by the limiting frame 34 and the limiting rod 3102, preventing the support plate 31 from shifting position after displacement. Supported by the first spring 21, the first spring 21 drives the top rod 2 to move downward. The top rod 2 drives the pressure rod body 4 to move downward through the threaded sleeve and screw 41. The pressure rod body 4 drives the presser foot 6 to move downward, so that the presser foot 6 can hold the fabric. When the height of the presser foot 6 needs to be adjusted for thicker fabric, the top rod 2 is rotated, and the positioning block 53 cooperates with the positioning groove 54, so that the positioning sleeve 5 cannot rotate. The surface of the limiting block 51 slides with the inner cavity of the limiting groove 52, so that the pressure rod body 4 can only move longitudinally inside the positioning sleeve 5. The positioning sleeve 5 stabilizes the position of the pressure rod body 4, so that the fabric can be held in place. When the push rod 2 rotates, the screw 41 moves longitudinally inside the threaded groove 42, thereby adjusting the position of the pressure rod body 4 and the height of the pressure foot 6. After the push rod 2 rotates, the screw 41 is locked inside the threaded groove 42 by the support of the second spring 43, preventing the push rod 2 from rotating and affecting the position of the pressure rod body 4 and the pressure foot 6. When the push rod 2 and the pressure rod body 4 need to be removed for maintenance, the second bolt 62 and the second nut 63 are loosened to separate the connecting column 61 from the pressure rod body 4. Then the first bolt 3302 and the first nut 3303 are loosened to separate the limiting plate 32 from the support plate 31, and the locking plate 35 is separated from the locking groove 36, so that the limiting plate 32 and the support plate 31 no longer restrict the position of the push rod 2. Then the push rod 2 is pulled upward to remove it. Then the pressure rod body 4 is pulled upward to remove it for replacement and maintenance.

[0025] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. An adaptive sewing machine pressure bar, characterized in that: The sewing machine includes a sewing machine body (1), a top rod (2) is slidably connected inside the sewing machine body (1), a first spring (21) is slidably sleeved on the surface of the top rod (2), one end of the first spring (21) is fixedly connected to the inner wall of the sewing machine body (1), a limit component (3) is provided on the surface of the top rod (2), a threaded groove (42) is provided on one end of the top rod (2), a screw (41) is threadedly connected inside the threaded groove (42), a pressure rod body (4) is fixedly connected on one end of the screw (41), a second spring (43) is fixedly connected to the top of the pressure rod body (4), one end of the second spring (43) is fixedly connected to the bottom of the top rod (2), a positioning sleeve (5) is slidably sleeved on the surface of the pressure rod body (4), the surface of the positioning sleeve (5) is engaged with the inner wall of the sewing machine body (1), and a presser foot (6) is provided on one end of the pressure rod body (4). The limiting component (3) includes a support plate (31) and a limiting plate (32). The support plate (31) and the limiting plate (32) are respectively sleeved on both sides of the pressure rod body (4). The bottom of the support plate (31) and the limiting plate (32) are jointly provided with a connecting component (33). A limiting frame (34) is rotatably installed on one side of the sewing machine body (1). The limiting frame (34) is used in conjunction with the support plate (31).

2. The adaptive sewing machine pressure bar according to claim 1, characterized in that: The inner cavities of the support plate (31) and the limiting plate (32) are both fixedly installed with a card plate (35), and the surface of the pressure rod body (4) is provided with a card groove (36), and the card plate (35) and the card groove (36) are used together.

3. The adaptive sewing machine pressure bar according to claim 1, characterized in that: A bracket (3101) is fixedly installed on the inner wall of the sewing machine body (1), and a limit rod (3102) is fixedly installed inside the bracket (3101). The support plate (31) is slidably sleeved on the surface of the limit rod (3102).

4. The adaptive sewing machine pressure bar according to claim 1, characterized in that: The connecting assembly (33) includes a connecting frame (3301). The bottom of the support plate (31) and the limiting plate (32) are both fixedly installed with the connecting frame (3301). The two connecting frames (3301) are connected by a first bolt (3302). One end of the first bolt (3302) is threaded with a first nut (3303).

5. The adaptive sewing machine pressure bar according to claim 1, characterized in that: The inner cavity of the positioning sleeve (5) is fixedly installed with a limiting block (51), and the surface of the pressure rod body (4) is provided with a limiting groove (52). The inner cavity of the limiting groove (52) is slidably connected to the surface of the limiting block (51).

6. The adaptive sewing machine pressure bar according to claim 1, characterized in that: The positioning sleeve (5) has a positioning block (53) fixedly installed on its surface, and the sewing machine body (1) has a positioning groove (54) in its inner cavity. The positioning block (53) and the positioning groove (54) are used together.

7. The adaptive sewing machine press bar according to claim 1, characterized in that: The top of the presser foot (6) is fixedly connected to a connecting column (61), and a second bolt (62) passes through one side of the connecting column (61). One end of the second bolt (62) passes through the main body of the presser rod (4), and a second nut (63) is threaded onto one end of the second bolt (62). The second nut (63) is used in conjunction with the main body of the presser rod (4).

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