Needle plate mounting structure of sewing machine

Abstract

The utility model provides a faller mounting structure of a sewing machine, and belongs to the technical field of sewing machines. The problem that after an existing sewing machine is used for a long time, a needle plate is prone to loosening is solved. According to the needle plate installation structure of the sewing machine, the sewing machine comprises a machine base, a needle plate and a tool apron fixed to the machine base, a front cushion block and a rear cushion block located behind the front cushion block are fixed to the tool apron, the needle plate installation structure comprises a front supporting part and a rear supporting part, the front cushion block extends rightwards to form the front supporting part, and the rear cushion block extends rightwards to form the rear supporting part. The lower surface of the front end of the needle plate abuts against the upper surface of the front supporting part, the lower surface of the rear end of the needle plate abuts against the upper surface of the rear supporting part, the left side and the right side of the front end of the needle plate are fixed to the front supporting part through first screws, and the left side of the rear end of the needle plate is fixed to the rear supporting part through second screws. According to the needle plate mounting structure of the sewing machine, a triangular positioning structure is formed through three-point positioning, and the stability of a needle plate used for a long time is improved.

Description

Technical Field

[0001] This utility model belongs to the field of sewing machine technology, and specifically refers to a needle plate mounting structure for a sewing machine. Background Technology

[0002] A sewing machine is a machine that sews fabric together with thread. It includes a needle bar mechanism, thread take-up mechanism, feed mechanism, thread hooking mechanism, pressing mechanism, thread winding device, and lubrication device. Sewing machines can be classified according to their structure or sewing process into flatbed sewing machines, chain stitch machines, overlock sewing machines, buttonhole machines, and bag sealing machines. A needle plate is fixedly mounted on the sewing machine's table. Below the needle plate are the feed dog and feed dog holder. The needle plate has needle holes and feed dog holes. When the sewing machine is working, the needle carrying the thread moves back and forth through the needle holes on the needle plate, while the feed dog swings back and forth up and down and back and forth within the feed dog holes.

[0003] Currently, the China Patent Network discloses an overlock sewing machine [Authorization Announcement No.: CN206052333U], which includes a machine base, a knife holder fixed on the machine base, a pad fixedly connected to the upper surface of the knife holder, and a needle plate fixedly connected to the upper surface of the pad. The pad includes a front pad fixedly connected to the front end of the needle plate and a rear pad fixedly connected to the rear end of the needle plate. The upper surface of the front pad is provided with a protruding step one, and the upper surface of the rear pad is provided with a protruding step two. The right side of step one is opposite to the left side of the front end of the needle plate, and the right side of step two is opposite to the left side of the rear end of the needle plate.

[0004] The above-mentioned needle plate installation has the following defects: one side of the needle plate is fixed to the pad by two screws, while the other side of the needle plate is suspended in the air. During the sewing process, the presser foot is constantly pressing on the needle plate, and the two screws that fix the needle plate are prone to loosening, which in turn causes the needle plate to loosen and affects the normal operation of the sewing machine. Utility Model Content

[0005] The purpose of this utility model is to address the aforementioned problems in existing technologies by proposing a needle plate mounting structure for sewing machines. The technical problem to be solved by this utility model is: how to solve the problem that the needle plate of existing sewing machines tends to loosen after prolonged use.

[0006] The objective of this utility model can be achieved through the following technical solutions:

[0007] A needle plate mounting structure for a sewing machine, the sewing machine including a machine base, a needle plate, and a cutter holder fixed on the machine base, wherein a front pad and a rear pad located behind the front pad are fixed on the cutter holder, characterized in that the needle plate mounting structure includes a front support part and a rear support part, the front support part being formed by extending to the right from the front pad, the rear support part being formed by extending to the right from the rear pad, the lower surface of the front end of the needle plate abutting against the upper surface of the front support part, the lower surface of the rear end of the needle plate abutting against the upper surface of the rear support part, the left and right sides of the front end of the needle plate being fixed to the front support part by screw one, and the left side of the rear end of the needle plate being fixed to the rear support part by screw two.

[0008] Working principle: The front support part of the front pad supports the front end of the needle plate, and the rear support part of the rear pad supports the rear end of the needle plate. Both the front and rear ends of the needle plate are supported from below, preventing them from being suspended in the air. The front and rear ends of the needle plate are then locked and positioned by two screws and one screw. The three screws improve the locking and positioning effect of the needle plate. During the sewing process, the presser foot is repeatedly pressed on the needle plate. Because the front and rear support parts support the front and rear ends of the needle plate, the needle plate can withstand greater pressure and is not easy to loosen. The three screws further improve the installation firmness and stability of the needle plate. Through three-point positioning, a triangular positioning structure is formed, making it difficult for the three screws to loosen and improving the stability of the needle plate during long-term use.

[0009] In the needle plate mounting structure of the sewing machine described above, mounting holes 1 are provided on both the left and right sides of the front end of the needle plate, and mounting holes 2 are provided on both the left and right sides of the front support. The mounting holes 1 and 2 correspond to each other, and the screw 1 is screwed into the mounting holes 1 and 2.

[0010] By coaxially setting each mounting hole one with the corresponding mounting hole two, screw one is screwed into mounting hole one and mounting hole two in sequence to fix the front end of the needle plate to the front support.

[0011] In the needle plate mounting structure of the sewing machine described above, a mounting hole three is provided on the left side of the rear end of the needle plate, and a mounting hole four is provided on the left side of the rear support. The screw two is screwed into the mounting hole three and the mounting hole four.

[0012] In this structure, mounting hole three and mounting hole four are coaxially arranged, and screw two is screwed into mounting hole three and mounting hole four in sequence to fix the rear end of the needle plate to the rear support.

[0013] In the needle plate mounting structure of the sewing machine described above, the front end of the cutter holder has an upwardly protruding front mounting portion, the rear end of the cutter holder has an upwardly protruding rear mounting portion, the front pad is fixed to the front mounting portion by screw three, and the rear pad is fixed to the rear mounting portion by screw four.

[0014] The front and rear mounting sections facilitate the installation and positioning of the front and rear pads on the tool holder.

[0015] Compared with the prior art, the needle plate mounting structure of the sewing machine of this utility model has the following advantages: the front support and rear support in this structure support the front and rear ends of the needle plate, so that the needle plate can withstand greater pressure and is not easy to loosen. The three screws further improve the installation firmness and stability of the needle plate, so that the three screws are not easy to loosen. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0017] Figure 2 This is a schematic diagram of the partial explosion structure of this utility model.

[0018] In the diagram, 1 is the base; 2 is the needle plate; 20 is the mounting hole one; 21 is the mounting hole three; 3 is the knife holder; 30 is the front mounting part; 31 is the rear mounting part; 4 is the front pad; 40 is the front support part; 41 is the mounting hole two; 5 is the rear pad; 50 is the rear support part; 51 is the mounting hole four; 6 is the screw one; 7 is the screw two; 9 is the screw three; and 10 is the screw four. Detailed Implementation

[0019] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0020] like Figure 1 and Figure 2 As shown, the sewing machine has a needle plate mounting structure. The sewing machine includes a base 1, a needle plate 2, and a cutter holder 3 fixed on the base 1. A front pad 4 and a rear pad 5 located behind the front pad 4 are fixed on the cutter holder 3. The needle plate mounting structure includes a front support part 40 and a rear support part 50. The front support part 40 is formed by extending to the right from the front pad 4, and the rear support part 50 is formed by extending to the right from the rear pad 5. The lower surface of the front end of the needle plate 2 is in contact with the upper surface of the front support part 40, and the lower surface of the rear end of the needle plate 2 is in contact with the upper surface of the rear support part 50. The left and right sides of the front end of the needle plate 2 are fixed to the front support part 40 by screw 6, and the left side of the rear end of the needle plate 2 is fixed to the rear support part 50 by screw 7.

[0021] Working principle: The front support part 40 of the front pad 4 supports the front end of the needle plate 2, and the rear support part 50 of the rear pad 5 supports the rear end of the needle plate 2. Both the front and rear ends of the needle plate 2 are supported, preventing them from being suspended. The front and rear ends of the needle plate 2 are then locked and positioned by two screws 6 and one screw 7. The three screws improve the locking and positioning effect of the needle plate 2. During the sewing process, the presser foot is repeatedly pressed on the needle plate 2. Because the front support part 40 and the rear support part 50 support the front and rear ends of the needle plate 2, the needle plate 2 can withstand greater pressure and is not easy to loosen. The three screws further improve the installation firmness and stability of the needle plate 2, making it difficult for the three screws to loosen.

[0022] In this embodiment, the front end of the blade holder 3 has an upwardly protruding front mounting portion 30, and the rear end of the blade holder 3 has an upwardly protruding rear mounting portion 31. The front pad 4 is fixed to the front mounting portion 30 by screw three 10, and the rear pad 5 is fixed to the rear mounting portion 31 by screw four 9. Mounting holes 1 20 are provided on both the left and right sides of the front end of the needle plate 2, and mounting holes 2 41 are provided on both the left and right sides of the front support portion 40. Mounting holes 1 20 and 2 41 correspond to each other, and screw one 6 is screwed into mounting holes 1 20 and 2 41. Mounting hole three 21 is provided on the left side of the rear end of the needle plate 2, and mounting hole four 51 is provided on the left side of the rear support portion 50. Screw two 7 is screwed into mounting holes 3 21 and 4 51.

[0023] like Figure 1 and Figure 2 As shown, a limiting post 8 is fixed on the front support part 40. The end face of the front end of the needle plate 2 is located behind the limiting post 8, and the end face of the front end of the needle plate 2 can abut against the limiting post 8. When installing the needle plate 2, after the end face of the front end of the needle plate 2 abuts against the limiting post 8, the position of the needle plate 2 can be adjusted left and right to facilitate the alignment of the mounting hole 1 20 and the mounting hole 2 41, thereby improving the convenience of installing the needle plate 2.

[0024] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A needle plate mounting structure for a sewing machine, the sewing machine comprising a machine base (1), a needle plate (2), and a cutter holder (3) fixed on the machine base (1), wherein a front pad (4) and a rear pad (5) located behind the front pad (4) are fixed on the cutter holder (3), characterized in that, The needle plate mounting structure includes a front support part (40) and a rear support part (50). The front support part (40) is formed by extending the front pad (4) to the right, and the rear support part (50) is formed by extending the rear pad (5) to the right. The lower surface of the front end of the needle plate (2) is in contact with the upper surface of the front support part (40), and the lower surface of the rear end of the needle plate (2) is in contact with the upper surface of the rear support part (50). The left and right sides of the front end of the needle plate (2) are fixed to the front support part (40) by screw one (6), and the left side of the rear end of the needle plate (2) is fixed to the rear support part (50) by screw two (7).

2. The needle plate mounting structure for a sewing machine according to claim 1, characterized in that, The needle plate (2) has mounting holes 1 (20) on both the left and right sides of its front end, and mounting holes 2 (41) are provided on both the left and right sides of the front support part (40). The mounting holes 1 (20) and 2 (41) correspond to each other, and the screw 1 (6) is screwed into the mounting holes 1 (20) and 2 (41).

3. The needle plate mounting structure for a sewing machine according to claim 1 or 2, characterized in that, The needle plate (2) has a mounting hole 3 (21) on the left side of its rear end, and the rear support part (50) has a mounting hole 4 (51) on the left side. The screw 2 (7) is screwed into the mounting hole 3 (21) and the mounting hole 4 (51).

4. The needle plate mounting structure of a sewing machine according to claim 1 or 2, characterized in that, The front end of the tool holder (3) has an upwardly protruding front mounting part (30), and the rear end of the tool holder (3) has an upwardly protruding rear mounting part (31). The front pad (4) is fixed to the front mounting part (30) by screw three (10), and the rear pad (5) is fixed to the rear mounting part (31) by screw four (9).

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