Stitch skipping prevention device of sewing machine

Abstract

The utility model discloses an anti-skipping device of a sewing machine, which comprises a presser foot, the top of the presser foot is fixedly connected with a vertical mounting rod, the side of the presser foot is provided with a pressing plate, a connecting component is arranged between the pressing plate and the mounting rod, a connecting frame is slidably sleeved on the outer wall of the mounting rod, and a connecting plate is fixedly mounted on the top of the pressing plate through a fixing part. A mounting hole matched with the connecting plate is formed in one side of the connecting frame, the limiting assembly is clamped between the connecting frame and the mounting rod, the fixing bolt is in sliding, penetrating and sleeving connection with the connecting frame, and the limiting assembly and the fixing bolt are matched to lock the connecting frame and the connecting plate. According to the utility model, the pressing plate can be assembled on the side of the pressing foot under the action of the limiting component, the fixing bolt and the connecting frame by utilizing a matched use mode of the pressing foot, the mounting rod, the pressing plate and the connecting component, so that the pressing plate is matched with the pressing foot for use, and the pressing plate can be directly disassembled or assembled by disassembling and loosening the fixing bolt.

Description

Technical Field

[0001] The utility model relates to the field of sewing machines, in particular to a needle skipping prevention device for sewing machines. Background Art

[0002] During the sewing process of the sewing machine, the presser foot is a very important component, which plays two roles. One is feeding, that is, sending the fabric forward to facilitate sewing, and the other is to flatten and compact the fabric so that the machine needle can sew the fabric.

[0003] When a sewing machine is sewing cloth, the sewing parts are usually folded together and then moved under the action of the presser foot. The sewing machine sews them, and when the presser foot is used to transport and press the cloth, the situation of skipped stitches in the cloth can be reduced. However, when sewing two pieces of cloth, the overlapping parts of the two pieces of cloth are located on both sides of the presser foot. As a result, when the cloth is transported, the cloth on both sides of the presser foot are wrinkled, which makes it inconvenient to press and transport the cloth on both sides of the presser foot, thereby further reducing the probability of skipped stitches in the sewing of the cloth. Utility Model Content

[0004] The utility model aims to provide a needle skipping prevention device for a sewing machine to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above object, the utility model provides the following technical solution: a needle skipping prevention device for a sewing machine, comprising a presser foot, the top of which is fixedly connected to a mounting rod in a vertical state;

[0006] A pressing plate is arranged on the side of the presser foot, and a connecting assembly is arranged between the pressing plate and the mounting rod, and the connecting assembly comprises:

[0007] A connecting frame, wherein the connecting frame is slidably sleeved on the outer wall of the mounting rod in a vertical direction;

[0008] A fixing member and a connecting plate, wherein the connecting plate is fixedly mounted on the top of the pressing plate in a horizontal state through the fixing member, and a mounting hole matching the connecting plate is opened on a side of the connecting frame facing the fixing member;

[0009] A fixing bolt and a limiting assembly, wherein the limiting assembly is clamped between the connecting frame and the mounting rod, and the fixing bolt and the connecting frame are slidably inserted and sleeved, and the limiting assembly cooperates with the fixing bolt to lock the connecting frame and the connecting plate.

[0010] Preferably, the outer wall of the connecting plate is slidably sleeved with the mounting hole, a slot is provided at one end of the connecting plate, and the outer wall of the fixing bolt is slidably sleeved with the inner cavity of the slot.

[0011] Preferably, the limiting component comprises:

[0012] A rectangular block, one side of which is provided with a threaded groove matching the fixing bolt, and the inner wall of the mounting hole and the outer wall of the mounting rod are both provided with rectangular holes matching the rectangular block;

[0013] A limiting plate is arranged on a side of the rectangular block away from the fixing bolt, and a hole matching the limiting plate is opened on one side of the connecting frame.

[0014] Preferably, the outer wall of the rectangular block is slidably engaged with the rectangular hole, one side of the rectangular block is pressed and fitted with the connecting plate, and one side of the limiting plate is pressed and fitted with the mounting rod.

[0015] Preferably, the rectangular block is symmetrically provided with connecting grooves on one side facing the limiting plate, a connecting rod is symmetrically fixedly connected to one side of the limiting plate, and a positioning plate is provided on one side of the rectangular block.

[0016] Preferably, one end of the outer wall of the connecting rod passes through the positioning plate and is fixedly sleeved with a fixing ring, the fixing ring is slidably sleeved inside the connecting groove, the outer wall of the connecting rod is slidably sleeved with a limiting spring, and the limiting spring is located between the fixing ring and the positioning plate.

[0017] Preferably, one side of the positioning plate is fixedly connected to a fixing block, one side of the rectangular block is provided with a groove matching the fixing block, the top of the rectangular block is slidably inserted and sleeved with an inner bolt, and the outer wall of the inner bolt is threadably inserted and sleeved with the fixing block.

[0018] Technical effects and advantages of the utility model:

[0019] The utility model utilizes the coordinated use of a presser foot, a mounting rod, a press plate and a connecting assembly, wherein the connecting assembly comprises a connecting frame, a fixing piece, a connecting plate, a fixing bolt and a limiting assembly. Under the action of the limiting assembly, the fixing bolt and the connecting frame, the press plate can be assembled on the side of the presser foot, so that the press plate and the presser foot are used in coordination, and the press plate can be directly disassembled or installed by removing and loosening the fixing bolt. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0021] Figure 2 It is a schematic diagram of the overall structure of the pressing plate of the utility model.

[0022] Figure 3 It is a schematic diagram of the internal structure of the top view of the connecting frame of the utility model.

[0023] Figure 4 It is a schematic diagram of the internal structure of the rectangular block of the utility model from top view.

[0024] In the figure: 1. presser foot; 2. mounting rod; 3. press plate; 4. connecting assembly; 41. connecting frame; 42. fixing piece; 43. connecting plate; 44. fixing bolt; 45. limiting assembly; 451. rectangular block; 452. threaded groove; 453. rectangular hole; 454. limiting plate; 456. connecting groove; 457. connecting rod; 458. positioning plate; 459. fixing collar; 4510. limiting spring; 4511. fixing block; 4512. inner bolt; 46. slot. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] The utility model provides Figure 1-4 The device for preventing stitch skipping of a sewing machine shown in the figure comprises a presser foot 1, the top of the presser foot 1 is fixedly connected to a vertical mounting rod 2, a pressing plate 3 is arranged on the side of the presser foot 1, and there are pressing plates 3 on both sides of the presser foot 1, and one side of the pressing plate 3 has a slope with the same direction and the same inclination angle as the inclined and raised end of the presser foot 1, so as to facilitate the cloth to slide through the bottom thereof, and under the action of the two pressing plates 3, the stability of the cloth passing through the bottom of the presser foot 1 can be improved, thereby reducing the probability of stitch skipping, and a connecting component 4 is arranged between the pressing plate 3 and the mounting rod 2.

[0027] In particular, the connecting assembly 4 includes a connecting frame 41, a fixing member 42, a connecting plate 43, a fixing bolt 44 and a limiting assembly 45. The connecting frame 41 is slidably sleeved on the outer wall of the mounting rod 2 in a vertical direction, and the connecting plate 43 is fixedly installed on the top of the pressing plate 3 in a horizontal state through the fixing member 42. A mounting hole matching the connecting plate 43 is opened on one side of the connecting frame 41 facing the fixing member 42, such as Figure 1 As shown, the mounting hole can carry two connecting plates 43, and the two connecting plates 43 are staggered, the limiting assembly 45 is clamped between the connecting frame 41 and the mounting rod 2, and the fixing bolt 44 is slidably inserted and sleeved with the connecting frame 41, and the limiting assembly 45 cooperates with the fixing bolt 44 to lock the connecting frame 41 and the connecting plate 43, the outer wall of the connecting plate 43 is slidably sleeved with the mounting hole, and a slot 46 is provided at one end of the connecting plate 43, and the outer wall of the fixing bolt 44 is slidably sleeved with the inner cavity of the slot 46, and then when the fixing bolt 44 tightens the limiting assembly 45, the connecting frame 41 and the connecting plate 43 can be locked.

[0028] In particular, the limiting assembly 45 includes a rectangular block 451 and a limiting plate 454. A threaded groove 452 matching the fixing bolt 44 is provided on one side of the rectangular block 451. A rectangular hole 453 matching the rectangular block 451 is provided on the inner wall of the mounting hole and the outer wall of the mounting rod 2. The rectangular block 451 can only slide in the rectangular hole 453, so that when the fixing bolt 44 is rotated, the rectangular block 451 can be prevented from rotating with the fixing bolt 44. The limiting plate 454 is arranged at the position where the rectangular block 451 is away from the fixing bolt 44. 4, and a hole matching the limit plate 454 is opened on one side of the connecting frame 41, the outer wall of the rectangular block 451 is slidably engaged with the rectangular hole 453, one side of the rectangular block 451 is pressed and fitted with the connecting plate 43, and one side of the limit plate 454 is pressed and fitted with the mounting rod 2, so that when the fixing bolt 44 is in a tightened state, the rectangular block 451 can not only press and fix the two connecting plates 43, and the rectangular block 451 is clamped inside the mounting rod 2, but also can clamp and limit the connecting frame 41.

[0029] Furthermore, a connecting groove 456 is symmetrically provided on one side of the rectangular block 451 facing the limiting plate 454, a connecting rod 457 is symmetrically fixedly connected to one side of the limiting plate 454, a positioning plate 458 is provided on one side of the rectangular block 451, a fixing block 4511 is fixedly connected to one side of the positioning plate 458, a groove matching the fixing block 4511 is provided on one side of the rectangular block 451, an inner bolt 4512 is slidably inserted and sleeved on the top of the rectangular block 451, and the outer wall of the inner bolt 4512 is threadedly inserted and sleeved with the fixing block 4511. After removing the fixing bolt 44, the rectangular block 451 can be slid out of the hole matching the limiting plate 454 on the connecting frame 41, and then the inner bolt 4512 can be removed, and the fixing block 4511 can be fixedly connected. The positioning plate 458 can be disassembled to facilitate the disassembly and maintenance of the internal parts of the rectangular block 451. One end of the outer wall of the connecting rod 457 passes through the positioning plate 458 and is fixedly sleeved with a fixing ring 459. The fixing ring 459 is slidably sleeved inside the connecting groove 456. The outer wall of the connecting rod 457 is slidably sleeved with a limiting spring 4510. The limiting spring 4510 is located between the fixing ring 459 and the positioning plate 458. When the rectangular block 451 squeezes the two connecting plates 43, the rectangular block 451 can give the limiting plate 454 an elastic pulling force through the limiting spring 4510 and the connecting rod 457, so that the limiting plate 454 squeezes the mounting rod 2, thereby further improving the stability of the connecting frame 41 installed on the outer wall of the mounting rod 2.

[0030] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A needle skipping prevention device for a sewing machine, comprising a presser foot (1), the top of the presser foot (1) being fixedly connected to a mounting rod (2) in a vertical state; It is characterized in that A pressing plate (3) is arranged on the side of the presser foot (1), and a connecting assembly (4) is arranged between the pressing plate (3) and the mounting rod (2), and the connecting assembly (4) comprises: A connecting frame (41), wherein the connecting frame (41) is slidably sleeved on the outer wall of the mounting rod (2) in a vertical direction; A fixing member (42) and a connecting plate (43), wherein the connecting plate (43) is fixedly mounted on the top of the pressing plate (3) in a horizontal state through the fixing member (42), and a mounting hole matching the connecting plate (43) is provided on a side of the connecting frame (41) facing the fixing member (42); A fixing bolt (44) and a limiting assembly (45), wherein the limiting assembly (45) is clamped between the connecting frame (41) and the mounting rod (2), and the fixing bolt (44) and the connecting frame (41) are slidably inserted and sleeved, and the limiting assembly (45) cooperates with the fixing bolt (44) to lock the connecting frame (41) and the connecting plate (43).

2. The anti-stitch skipping device of a sewing machine according to claim 1, characterized in that: The outer wall of the connecting plate (43) is slidably sleeved with the mounting hole, one end of the connecting plate (43) is provided with a slot (46), and the outer wall of the fixing bolt (44) is slidably sleeved with the inner cavity of the slot (46).

3. The anti-stitch skipping device of a sewing machine according to claim 1, characterized in that: The limiting component (45) comprises: A rectangular block (451), one side of the rectangular block (451) is provided with a threaded groove (452) matching the fixing bolt (44), and the inner wall of the mounting hole and the outer wall of the mounting rod (2) are both provided with a rectangular hole (453) matching the rectangular block (451); A limiting plate (454) is arranged on a side of the rectangular block (451) away from the fixing bolt (44), and a hole matching the limiting plate (454) is opened on one side of the connecting frame (41).

4. The anti-stitch skipping device of a sewing machine according to claim 3, characterized in that: The outer wall of the rectangular block (451) is slidably engaged with the rectangular hole (453), one side of the rectangular block (451) is pressed and fitted with the connecting plate (43), and one side of the limiting plate (454) is pressed and fitted with the mounting rod (2).

5. The anti-stitch skipping device of a sewing machine according to claim 4, characterized in that: The rectangular block (451) is symmetrically provided with a connection groove (456) on one side facing the limiting plate (454), a connection rod (457) is symmetrically fixedly connected to one side of the limiting plate (454), and a positioning plate (458) is provided on one side of the rectangular block (451).

6. The anti-stitch skipping device of a sewing machine according to claim 5, characterized in that: One end of the outer wall of the connecting rod (457) passes through the positioning plate (458) and is fixedly sleeved with a fixing ring (459), and the fixing ring (459) is slidably sleeved inside the connecting groove (456). The outer wall of the connecting rod (457) is slidably sleeved with a limiting spring (4510), and the limiting spring (4510) is located between the fixing ring (459) and the positioning plate (458).

7. The anti-stitch skipping device of a sewing machine according to claim 5, characterized in that: A fixing block (4511) is fixedly connected to one side of the positioning plate (458), a groove matching the fixing block (4511) is opened on one side of the rectangular block (451), an inner bolt (4512) is slidably inserted and sleeved on the top of the rectangular block (451), and the outer wall of the inner bolt (4512) is threadedly inserted and sleeved on the fixing block (4511).

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