Threading mechanism of sewing machine

Abstract

The utility model discloses a threading mechanism of a sewing machine, which comprises a thread hooking plate and a thread hooking plate mounting rack, the thread hooking plate is adjustably connected with the thread hooking plate mounting rack, and the position of the thread hooking plate can be adjusted up and down. The thread hooking plate is installed on the installation block through the adjusting rod, and the thread hooking plate installation frame is rotatably connected to the adjusting rod and can drive a thread hook of the thread hooking plate to rotate to penetrate through a needle hole of the needle rod and is used for assisting threading. A first adjusting structure is arranged on the adjusting rod and can adjust the extending distance of the adjusting rod relative to the mounting block so as to adjust the position of the wire hooking plate left and right. A limiting rod is further arranged on the mounting block and used for limiting the front-back distance between the thread hooking plate and the needle rod, the length of the limiting rod can be adjusted, and the limiting rod abuts against the thread hooking plate mounting frame so as to adjust the front-back position of the thread hooking plate. According to the utility model, the up-and-down, left-and-right and front-and-back positions of the thread hooking plate can be adjusted accurately, so that the thread hooking plate is aligned with a needle hole of a needle rod, and the thread hooking plate can smoothly penetrate through the needle hole to assist threading and is prevented from colliding with or deviating from the needle hole.

Description

TECHNICAL FIELD

[0001] The utility model relates to sewing machine technical field especially a sewing machine's threading device. BACKGROUND

[0002] Sewing machine is with one or more sewing thread, on the sewing material forms one or more stitches, makes one layer or more sewing material interweaves or sews up the machine. The traditional sewing machine usually needs manual to give needle bar thread, and the needle hole on the needle bar is small, and it is difficult, time -consuming and laborious to thread, and the efficiency is very low, so now a lot of mechanisms for assisting threading appear, and the threading mechanism includes thread lifting lever, when threading, the thread lifting lever first passes through the needle hole, then the thread is put on the thread lifting lever, the thread lifting lever returns and separates from the needle hole, and the thread is taken out from the needle hole, and the threading is completed.

[0003] Because the thread lifting lever needs to be inserted into the needle hole to assist threading, the position of the thread lifting lever needs to be as accurate as possible and align with the needle hole of the needle bar, but the position of the existing thread lifting lever is not easy to adjust, and once an error occurs during installation of the needle bar and the thread lifting lever, the thread lifting lever cannot align with the needle hole, which affects threading. SUMMARY

[0004] In order to solve the above problems of the prior art, the utility model provides a sewing machine's threading mechanism, which can help the sewing machine to quickly thread, and the position can be adjusted in multiple directions to meet the position of the needle bar, and facilitate threading.

[0005] The technical scheme adopted is as follows:

[0006] A sewing machine's threading mechanism, comprising a needle bar, a thread hooking plate corresponding to the needle bar, a thread hooking plate mounting frame mounting the thread hooking plate, an installation block provided on the needle bar or other installation rod outside the needle bar, the thread hooking plate mounting frame being rotatably connected to the installation block through an adjusting rod, at least one installation hole for installing the adjusting rod being provided on the installation block, at least one first adjusting structure for adjusting the distance between the adjusting rod and the installation block being provided on the corresponding position of the installation block, a limiting rod for limiting the distance between the thread hooking plate mounting frame and the needle bar being provided on the installation block, the thread hooking plate being adjustably provided on the thread hooking plate mounting frame, a second adjusting structure being provided between the thread hooking plate and the thread hooking plate mounting frame, and a thread hook being provided at the front end of the thread hooking plate and capable of being inserted into the needle hole of the needle bar.

[0007] Further, the installation rod is a presser foot rod.

[0008] Further, the first adjusting structure is at least one first adjusting bolt provided on the installation block and capable of penetrating the sidewall of the installation hole to fix the adjusting rod.

[0009] Further, a torsional spring is provided between the adjusting rod and the thread hooking plate mounting frame.

[0010] Further, the mounting block is provided with a limiting frame away from the end of the needle rod, which limits the rotation range of the hooking plate mounting rack.

[0011] Further, two mounting holes are arranged on the mounting block in sequence from top to bottom, and two limiting rods are correspondingly arranged.

[0012] Further, the second adjusting structure comprises a connecting plate connected with the hooking plate, at least one pair of corresponding waist-shaped grooves arranged on the hooking plate and the connecting plate, and at least one second adjusting bolt arranged in the waist-shaped groove and used for connecting and fixing the hooking plate and the hooking plate mounting rack.

[0013] Compared with the prior art, the utility model has the beneficial effects that:

[0014] The utility model provides a threading mechanism of sewing machine, including hooking plate, hooking plate mounting rack, hooking plate and hooking plate mounting rack adjustable connection can adjust the position of hooking plate. Hooking plate is installed on the mounting block through the adjusting rod, and the hooking plate mounting rack is rotatably connected on the adjusting rod, can drive the line hook of hooking plate and rotate through the needle hole of needle rod, is used for assisting threading. The first adjusting structure is equipped on the adjusting rod, can adjust the distance of adjusting rod and mounting block, and the position of hooking plate is adjusted left and right. The limiting rod is further equipped on the mounting block, and the front and back distance of hooking plate and needle rod is limited, and the length of limiting rod can be adjusted, and the hooking plate mounting rack is resisted, to adjust the front and back position of hooking plate. The "front and back" refers to the direction close to or away from the needle; The "left and right" refers to the direction close to or away from the mounting block. The utility model can adjust the up and down, left and right, front and back position of hooking plate, can accurately adjust hooking plate, makes hooking plate align the needle hole of needle rod, and hooking plate can smoothly pass through needle hole and assist threading, prevents hooking plate from colliding or deviating from needle hole. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 、 2 , 7 is the structure schematic diagram of different angle of the utility model;

[0016] Figure 3 is Figure 2 the enlarged view of a place;

[0017] Figure 4 be a part of structure schematic diagram of the utility model;

[0018] Figure 5 be a part of structure dismounting drawing of the utility model;

[0019] Figure 6 be the perspective view of the utility model;

[0020] Wherein, the hooking plate 1, the hooking plate mounting frame 2, the mounting block 3, the adjusting rod 4, the first adjusting structure 5, the first adjusting bolt 501, the limiting rod 6, the needle rod 7, the mounting rod 8, the limiting frame 9, the second adjusting structure 10, the waist-shaped groove 1001, the second adjusting bolt 1002, the connecting plate 1003, the needle hole 11, the mounting hole 12, the torsional spring 13, and the thread hook 14. DETAILED DESCRIPTION

[0021] The utility model will be further described below in combination with specific embodiments.

[0022] In the description of the utility model, it is understood that the terms "upper", "lower", "left", "right", "front", "back" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and cannot be understood as a limitation on the utility model. The "front and back" refers to the direction of the hooking plate approaching or moving away from the needle; and the "left and right" refers to the direction of the hooking plate approaching or moving away from the mounting block.

[0023] Reference Figures 1-7 A threading mechanism of a sewing machine, comprising a needle rod 7, a hooking plate 1 corresponding to the needle rod, a hooking plate mounting frame 2 for mounting the hooking plate 1, and a mounting block 3 provided on the needle rod or other mounting rod 8 outside the needle rod, wherein the hooking plate mounting frame 2 is rotatably connected to the mounting block 3 through an adjusting rod 4, the mounting block 3 is provided with at least one mounting hole 12 for mounting the adjusting rod 4, the mounting block 3 is provided with at least one first adjusting structure 5 corresponding to the position of the adjusting rod 4, which can adjust the distance of the adjusting rod 4 extending out of the mounting block and fix it, the mounting block 3 is provided with a limiting rod 6 for limiting the distance between the hooking plate mounting frame 2 and the needle rod, the hooking plate 1 is adjustably arranged on the hooking plate mounting frame 2, the second adjusting structure 10 is arranged between the hooking plate 1 and the hooking plate mounting frame 2, and the front end of the hooking plate 1 is provided with a thread hook 14 which can extend into the needle hole of the needle rod 7.

[0024] The thread hook needs to pass through the needle hole 11 of the needle rod, and after passing out, the face thread is placed on the thread hook 14, and then the hooking plate 1 is driven to reset, so that the face thread can be taken out of the needle hole, and the threading is completed. The thread hooking of the hooking plate 1 can be manually driven by hand, or can be driven by an electric control mode.

[0025] Because the needle hole is small, if the hooking plate 1 needs to pass through the needle hole smoothly, the hooking plate 1 needs to be aligned with the needle hole, and the accuracy of the position of the hooking plate 1 during installation is required to be high, and the tolerance rate is small, so the adjusting structure is arranged to control the position of the hooking plate 1, so that the hooking plate 1 is accurately aligned with the needle hole, and the threading is facilitated.

[0026] In this embodiment, the mounting rod 8 is a presser foot rod.

[0027] The first adjusting structure 5 is at least one first adjusting bolt 501 arranged on the mounting block 3 and penetrating the side wall of the mounting hole to fix the adjusting rod.

[0028] The adjusting rod 4 and the thread hooking plate mounting frame 2 are provided with a torsion spring 13.

[0029] The mounting block 3 is provided with a limiting frame 9 away from the needle rod to limit the rotating range of the thread hooking plate mounting frame 2.

[0030] The mounting block 3 is provided with two mounting holes 12 arranged in sequence from top to bottom, and the limiting rod 6 is correspondingly provided with two limiting rods.

[0031] The second adjusting structure 10 comprises a connecting plate 1003 connected with the thread hooking plate 1, at least one pair of corresponding waist-shaped grooves 1001 arranged on the thread hooking plate 1 and the connecting plate 1003, and at least one second adjusting bolt 1002 arranged in the waist-shaped groove 1001 to connect and fix the thread hooking plate and the thread hooking plate mounting frame.

[0032] The thread hooking plate 1 can be adjusted in all directions, the installation error can be reduced through adjustment, the position of the thread hooking plate 1 is more accurate, the thread hooking plate 1 can accurately enter the needle hole and complete the thread hooking and perforating, and collision and abrasion are not prone to occur.

[0033] The above only describes optional embodiments of the present application, and does not limit the patent scope of the present application, and any equivalent structural transformation made by using the content of the present application specification and drawings, or direct / indirect application in other related technical fields is included in the patent protection scope of the present application.

Claims

1. A threading mechanism of a sewing machine, comprising a needle bar (7), a thread hooking plate (1) arranged correspondingly to the needle bar, a thread hooking plate mounting frame (2) mounting the thread hooking plate (1), and a mounting block (3) arranged on the needle bar or other mounting bar (8) outside the needle bar, characterized in that: The hooking plate mounting frame (2) is rotatably connected to the mounting block (3) through the adjusting rod (4), the mounting block (3) is provided with at least one mounting hole (12) for mounting the adjusting rod (4), the mounting block (3) is provided with at least one first adjusting structure (5) corresponding to the position for adjusting the distance between the adjusting rod (4) and the mounting block, the mounting block (3) is provided with a limiting rod (6) for limiting the distance between the hooking plate mounting frame (2) and the needle rod, the hooking plate (1) is arranged on the hooking plate mounting frame (2) and can be adjusted up and down, the second adjusting structure (10) is arranged between the hooking plate (1) and the hooking plate mounting frame (2), and the front end of the hooking plate (1) is provided with a thread hook (14) which can be inserted into the needle thread hole of the needle rod (7).

2. The threading mechanism of a sewing machine according to claim 1, characterized in that: The mounting rod (8) is a presser foot rod.

3. The threading mechanism of a sewing machine according to claim 1, characterized in that: The first adjusting structure (5) is at least one first adjusting bolt (501) arranged on the mounting block (3) and passing through the side wall of the mounting hole to fix the adjusting rod.

4. The threading mechanism of a sewing machine according to claim 1, characterized in that: The adjusting rod (4) and the hooking plate mounting frame (2) are provided with a torsion spring (8).

5. The threading mechanism of a sewing machine according to claim 1, characterized in that: The mounting block (3) is provided with a limiting frame (9) at the end away from the needle rod for limiting the rotation range of the hooking plate mounting frame (2).

6. The threading mechanism of a sewing machine according to claim 1, characterized in that: The mounting block (3) is provided with two mounting holes (12) arranged in sequence from top to bottom, and the limiting rod (6) is correspondingly provided with two limiting rods.

7. The threading mechanism of a sewing machine according to claim 1, characterized in that: The second adjusting structure (10) comprises a connecting plate (1003) connected to the hooking plate (1), at least one pair of corresponding waist-shaped grooves (1001) arranged on the hooking plate (1) and the connecting plate (1003), and at least one second adjusting bolt (1002) arranged in the waist-shaped groove (1001) for connecting the hooking plate and the hooking plate mounting frame and being fixed.

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