Quick thread changing mechanism of sewing machine

Abstract

The utility model relates to a quick thread changing mechanism of a sewing machine, which comprises a thread spool, a mounting component, an adjusting component and a thread changing component. The installation assembly comprises a sleeve which is installed on the sewing machine through a flange, and a supporting column is rotationally arranged in the sleeve. Based on the double adjusting parts, multi-angle adjustment of the bobbin can be achieved, the position and the orientation of the bobbin are adjusted according to the position of a thread using position of the sewing machine and the position of a thread changing mechanism, thread outlet is smooth, and thread clamping and winding are not prone to occurring; a screw rod and a screw are adopted for fastening and fixing, a worker can conveniently adjust and change wires, the fault rate is low, a bunched wire annular adjusting pipe is arranged, the winding risk is reduced, and the use stability is improved; the device is simple in structure, convenient to operate, high in reliability, suitable for various sewing machines and wide in application range.

Description

Technical Field

[0001] The utility model relates to the technical field of sewing machine thread changing, in particular to a rapid thread changing mechanism for a sewing machine. Background Art

[0002] A sewing machine is a machine that uses one or more sewing threads to form one or more stitches on the sewing material, so as to interweave or sew together one or more layers of sewing materials. The sewing machine can sew fabrics such as cotton, linen, silk, wool, and artificial fibers, as well as products such as leather, plastic, and paper. The stitches sewn are neat, beautiful, flat and firm, and the sewing speed is fast and it is easy to use.

[0003] When the sewing machine is working, the bobbin is placed on the spindle. The spindle is usually a thin rod vertically installed on the sewing machine. When the sewing machine is working, if the thread wound on the bobbin is almost used up, the self-weight of the bobbin is low. When pulling the thread to drive the spindle to rotate, the spindle will fall off the spindle, and the operator needs to place the bobbin on the spindle again, resulting in the stop of the sewing machine work and reducing the work efficiency.

[0004] Chinese Utility Model Patent CN221460681U discloses a thread changing mechanism for a sewing machine, aiming to solve the technical problem that when the current sewing machine is working, the bobbin with less thread will fall off the spindle. It includes a sewing machine bracket, the top of the sewing machine bracket is installed with a sewing machine main body, the top of the sewing machine main body is installed with a thread changing device, the thread changing device includes a rotating shaft, one end of the rotating shaft is installed with a fixing device, the fixing device includes a circular plate, and a long shaft is installed on one side of the circular plate. In the utility model, by pulling the circular plate, the steering column installed on one side of the circular plate rotates around the axis of the slider, the bobbin is placed on the rotating shaft, then the long shaft is rotated to lap the rotating shaft on the limiting groove, and the circular plate is loosened and the rotating shaft is inserted into the limiting groove to complete the fixing, and the circular plate and the support plate limit the bobbin.

[0005] It solves the technical problem that when the sewing machine is working, the bobbin with less thread will fall off the spindle, but there are still the following technical defects that need to be solved urgently:

[0006] 1. When the thread on the bobbin is in use, due to the pulling at the thread using place of the sewing machine, it is cheap to both ends of the bobbin and may get entangled, affecting the work of the sewing machine;

[0007] 2. The spring structure adopted by it may cause the spring to open due to the force when the sewing machine thread is output quickly, thus jamming the thread and affecting production, and its structural reliability is low. Summary of the Invention

[0008] Technical Problems to be Solved by the Utility Model

[0009] When the thread on the bobbin is in use, due to the pulling at the sewing thread using part of the sewing machine, it is prone to winding at both ends of the bobbin, which may affect the operation of the sewing machine. The spring structure it adopts may cause the spring to expand under the force when the sewing thread is output quickly, thus jamming the thread and affecting production, and its structural reliability is low.

[0010] Technical solutions for solving technical problems

[0011] Other advantageous and partially creative implementation manners and extended designs of the present utility model are described in the following description.

[0012] A rapid thread-changing mechanism for a sewing machine, comprising a bobbin, and further comprising a mounting assembly, an adjusting assembly and a thread-changing assembly;

[0013] The mounting assembly includes a sleeve, the sleeve is mounted on the sewing machine through a flange, and a support column is rotatably arranged inside it;

[0014] The adjusting assembly includes:

[0015] A first clamping plate, fixedly mounted on the upper end face of the support column;

[0016] A second clamping plate, movably mounted on one side of the first clamping plate;

[0017] An adjusting block, arranged between the first clamping plate and the second clamping plate;

[0018] A fastening screw, fixed on the side wall of the first clamping plate and passing through the adjusting block and the second clamping plate;

[0019] The thread-changing assembly includes the bobbin, and the bobbin is fixed on the end face of the adjusting block.

[0020] Preferably, the sleeve and the support column are fastened by a fastening screw passing through the sleeve.

[0021] Preferably, a plurality of anti-slip protrusions are arranged on the opposite sides of the first clamping plate and the second clamping plate.

[0022] Preferably, the thread-changing assembly further includes:

[0023] A baffle plate, arranged at both ends of the bobbin;

[0024] The baffle plate located between the bobbin and the adjusting block is fixedly mounted;

[0025] The baffle plate located at the end of the bobbin away from the adjusting block is movably arranged;

[0026] A plugging screw, arranged at the end of the bobbin.

[0027] Preferably, a threaded hole matching the blocking screw is embedded in the end of the spool away from the adjusting block, and a through hole is penetrated through the baffle away from the adjusting block.

[0028] Preferably, a hand wheel is provided on the end surface of the blocking screw away from the bobbin.

[0029] Preferably, an adjusting tube is provided on the side wall of the baffle close to the adjusting block, and a cable tie ring is provided at the free end of the adjusting tube.

[0030] Preferably, the pillar is composed of a first pillar rotatably disposed in a sleeve and a second pillar located at the top end of the sleeve and having the same diameter as the sleeve, and the pillar includes a second pillar end face rotatably disposed in contact with the top end face of the sleeve.

[0031] Effect of utility model

[0032] 1. The double adjustment components can realize multi-angle adjustment of the thread drum. According to the position of the thread point and the thread changing mechanism of the sewing machine, the position and direction of the thread drum can be adjusted, and the thread output is smooth and not easy to get stuck or entangled;

[0033] 2. It uses screws for fastening and fixing, which is convenient for staff to adjust and change wires, with low failure rate. It is also equipped with a wire harness ring adjustment tube to reduce the risk of entanglement and improve the stability of use.

[0034] 3. Simple structure, convenient operation, high reliability, suitable for a variety of sewing machines, wide range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The following is a detailed description of the embodiments of the present invention according to the accompanying drawings. In the accompanying drawings:

[0036] Figure 1 This is the first structural view of the utility model;

[0037] Figure 2 It is the second structural view of the utility model;

[0038] Figure 3 is an enlarged view of the adjustment mechanism included in the utility model;

[0039] Figure 4 It is a partial cross-sectional view of the adjustment mechanism included in the utility model.

[0040] Description of Reference Numerals

[0041] 1. Sleeve; 1-1. Fastening screw; 101. Flange; 2. Pillar; 2-1. Anti-slip protrusion; 201. First clamping plate; 202. Second clamping plate; 202-1. Fastening screw; 3. Adjusting block; 3-1. Baffle; 301. Bobbin; 302. Sealing screw; 302-1. Handwheel; 4. Adjusting tube; 401. Cable tie ring. Detailed implementation mode

[0042] Hereinafter, with reference to the accompanying drawings, a sewing machine quick thread-changing mechanism that is an embodiment of the present utility model will be described.

[0043] Please refer to Figures 1 - 4 As shown, a sewing machine quick thread-changing mechanism includes a mounting component, an adjusting component, and a thread-changing component;

[0044] The thread-changing component is used to place the bobbin and can be quickly disassembled and assembled. The mounting component is used to mount the thread-changing component on the sewing machine, and the adjusting component is used to adjust the position of the thread-changing component relative to the mounting component;

[0045] Regarding the mounting component, it includes:

[0046] The sleeve 1 is mounted on the sewing machine through the flange 101;

[0047] The support column 2 is rotatably mounted between the sleeves 1;

[0048] Specifically, a fastening screw 1-1 is embedded on the outer wall of the sleeve 1, and a threaded hole for accommodating the fastening screw 1-1 is penetrated through the outer wall of the sleeve 1;

[0049] More specifically, the support column 2 is composed of a first column rotatably arranged in the sleeve 1 and a second column having the same diameter as the top end of the sleeve 1. The end face of the second column included in the support column 2 is rotatably arranged in contact with the top end face of the sleeve 1;

[0050] During use, the fastening screw 1-1 is threadedly assembled in the threaded hole, and its end abuts against the outer wall of the support column 2 to complete the relative fixation of the sleeve 1 and the support column 2;

[0051] Regarding the adjusting component, it includes:

[0052] The first clamping plate 201 is fixedly mounted on the upper end face of the support column 2;

[0053] The second clamping plate 202 is movably arranged on the upper end face of the support column 2 and is located on one side of the first clamping plate 201;

[0054] Specifically, a number of anti-slip protrusions 2-1 are arranged on the opposite sides of the first clamping plate 201 and the second clamping plate 202, and the number of anti-slip protrusions 2-1 is evenly distributed in a linear array on the first clamping plate 201 and the second clamping plate 202;

[0055] The adjusting block 3 is arranged between the first clamping plate 201 and the second clamping plate 202;

[0056] The fastening screw rod 202-1 is fixed to the side wall of the first clamping plate 201 close to the second clamping plate 202;

[0057] Specifically, the fastening screw 202-1 passes through the adjusting block 3 and the second clamping plate 202;

[0058] During use, the staff installs a nut matching the fastening screw 202-1 at the end of the fastening screw 202-1. Through the principle of screw-nut fastening, the first clamping plate 201 and the second clamping plate 202 clamp the adjusting block 3, that is, rotate the adjusting block 3 to a suitable position, and press the first clamping plate 201 and the second clamping plate 202 through the nut and the fastening screw 202-1 to fix the adjusting block 3, which is convenient for adjustment and fixation;

[0059] Regarding the wire-changing assembly, it includes:

[0060] A spool 301, fixedly installed on the end face of the adjusting block 3 away from the first clamping plate 201 and the second clamping plate 202;

[0061] Baffles 3-1, arranged at both ends of the spool 301;

[0062] Specifically, the baffle 3-1, the spool 301, and the adjusting block 3 located between the spool 301 and the adjusting block 3 are fixedly connected, and the baffle 3-1 located at the end of the spool 301 away from the adjusting block 3 is movably installed;

[0063] More specifically, in the assembled state, both baffles 3-1 are in close contact with the end of the spool 301;

[0064] A through hole is penetrated through the baffle 3-1 away from the adjusting block 3;

[0065] A plugging screw 302, arranged at the end of the spool 301, and a handwheel 302-1 is arranged on the end face away from the spool 301;

[0066] Specifically, a threaded hole matching the plugging screw 302 is embedded at the end of the spool 301 away from the adjusting block 3;

[0067] During use, the staff removes the baffle 3-1 away from the adjusting block 3, sleeved the bobbin onto the spool 301, installs the baffle 3-1 away from the adjusting block 3, and completes the fixation by screwing the plugging screw 302 into the threaded hole at the end of the spool 301;

[0068] An adjusting tube 4 is installed on the side wall of the baffle 3-1 close to the adjusting block 3, and a wire bundling ring 401 is arranged at the free end of the adjusting tube 4;

[0069] Specifically, the adjusting tube 4 is from the prior art and is composed of a tube body, a mesh sleeve, and a connecting piece. The tube body and the mesh sleeve are made of stainless steel materials, which can provide good flexibility and corrosion resistance; the corrugated part of the tube body is spiral or annular, which enables the adjusting tube 4 to bend in multiple directions without damage;

[0070] During use, the staff move the adjusting tube 4 to its appropriate position (the wire bundling ring 401 is located in the middle of the bobbin, which is the appropriate position of the adjusting tube 4), thread the end of the thread on the bobbin through the wire bundling ring 401, lead it to the place where the sewing machine uses the thread, and carry out the work. Since the position of the wire bundling ring 401 is in the middle of the bobbin, during the use of the sewing machine thread, it will not contact the gap between the bobbin and the baffle 3-1 or the gap between the baffle 3-1 and the bobbin shaft 301, avoiding winding and affecting the normal operation of the sewing machine.

[0071] Normal use state

[0072] S1. The staff install the sleeve 1 included in this device on the sewing machine through the flange 101, rotate the handwheel 302-1 to drive the plugging screw 302 and the baffle 3-1, sleeved the bobbin on the outer wall of the bobbin shaft 301, and install the baffle 3-1 and the plugging screw 302;

[0073] S2. Release the fastening screw 202-1, adjust the angle of the adjusting block 3 relative to the first clamping plate 201 and the second clamping plate 202, and then fasten it with the fastening screw 202-1 and the nut;

[0074] S3. Release the fastening screw 1-1, rotate the support column 2, adjust the relative position of the sleeve 1 and the support column 2, and then fasten it with the fastening screw 1-1;

[0075] S4. Thread the end of the thread on the bobbin through the wire bundling ring 401, lead it to the place where the sewing machine uses the thread, and carry out the work;

[0076] S5. When this bobbin is used up, repeat the steps of S1 above to complete the thread changing operation.

[0077] Compared with the prior art, the present utility model has the following characteristics:

[0078] 1. By adopting double adjusting components, the multi-angle adjustment of the bobbin can be realized. According to the position of the thread using place of the sewing machine and the thread changing mechanism, the position and orientation of the bobbin are adjusted, and the thread outlet is smooth and not easy to get stuck and wound;

[0079] 2. By using screws and bolts for fastening and fixing, it is convenient for the staff to adjust and change the thread, with low failure rate, and is equipped with a wire bundling ring 401 and an adjusting tube 4, reducing the winding risk and improving the use stability;

[0080] 3. The structure is simple, the operation is convenient, the reliability is high, it is applicable to various sewing machines, and the application range is wide.

[0081] The present utility model is not limited to the implementation mode, and various deformations can be implemented as long as its purpose is not violated.

Claims

1. A quick thread changing mechanism for a sewing machine, comprising a thread spool (301), characterized in that: It also includes installation components, adjustment components and line change components; The mounting assembly comprises a sleeve (1), the sleeve (1) being mounted on the sewing machine via a flange (101), and a support (2) being rotatably arranged inside the sleeve; The adjustment component comprises: A first clamping plate (201) is fixedly mounted on the upper end surface of the support (2); A second clamping plate (202) movably mounted on one side of the first clamping plate (201); An adjustment block (3) is arranged between the first clamping plate (201) and the second clamping plate (202); A fastening screw (202-1) is fixed to the side wall of the first clamping plate (201) and passes through the adjustment block (3) and the second clamping plate (202); The line changing assembly comprises the line spool (301), and the line spool (301) is fixed to the end surface of the adjustment block (3).

2. A quick thread changing mechanism for a sewing machine according to claim 1, characterized in that: The sleeve (1) and the support (2) are fastened by a fastening screw (1-1) which is arranged through the sleeve (1).

3. A quick thread changing mechanism for a sewing machine according to claim 1, characterized in that: A plurality of anti-slip protrusions (2-1) are provided on the facing sides of the first clamping plate (201) and the second clamping plate (202).

4. A quick thread changing mechanism for a sewing machine according to claim 1, characterized in that: The line changing assembly also includes: Baffles (3-1) are arranged at both ends of the bobbin (301); The baffle (3-1) is fixedly installed between the bobbin (301) and the adjustment block (3); The baffle (3-1) is movably arranged at the end of the spool (301) away from the regulating block (3); The sealing screw (302) is arranged at the end of the bobbin (301).

5. A quick thread changing mechanism for a sewing machine according to claim 4, characterized in that: A threaded hole matching the blocking screw (302) is embedded in the end of the spool (301) away from the adjusting block (3), and a through hole is penetrated through the baffle (3-1) away from the adjusting block (3).

6. A quick thread changing mechanism for a sewing machine according to claim 4, characterized in that: A hand wheel (302-1) is provided on the end surface of the blocking screw (302) away from the bobbin (301).

7. A quick thread changing mechanism for a sewing machine according to claim 4, characterized in that: An adjusting tube (4) is provided on the side wall of the baffle (3-1) close to the adjusting block (3), and a wire tie ring (401) is provided at the free end of the adjusting tube (4).

8. The quick thread changing mechanism for a sewing machine according to claim 1, characterized in that: The support column (2) is composed of a first column rotatably arranged in the sleeve (1) and a second column located at the top end of the sleeve (1) and having the same diameter as the sleeve (1). The end face of the second column included in the support column (2) is rotatably arranged in contact with the top end face of the sleeve (1).

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