Electronic winder and sewing machine

Abstract

The utility model provides an electronic winder and a sewing machine, and belongs to the technical field of sewing equipment. The electronic winder comprises a mounting seat, a positioning seat, a rotatable wire spool and a rotatable wrench shaft are arranged on the mounting seat, a driving part for driving the wire spool to rotate is arranged on the positioning seat, a sensor for detecting magnetic field changes is arranged on the positioning seat, a wrench and a stop block are arranged at one end and the other end of the wrench shaft respectively, and the stop block is arranged on the mounting seat. A magnet is arranged on the stop block, and the sensor is electrically connected with the driving piece. According to the electronic winder, the sensor detects the change of the magnetic field to control the driving piece to drive the shuttle peg to rotate, and the winding amount can be accurately controlled according to needs.

Description

Technical Field

[0001] The utility model belongs to the technical field of sewing equipment and relates to an electronic bobbin winder and a sewing machine. Background Art

[0002] Existing mechanical bobbin winders often fail to precisely control the amount of bobbin thread wound, requiring repeated trial and error adjustments to find the right amount. Existing electronic bobbin winding technology also suffers from a complex overall structure, significant limitations, and a poor user experience.

[0003] Patent document with application number 201920252050.7 provides a winding device for a sewing machine, which includes a mounting seat, a placement groove for placing the bobbin on the mounting seat, a rotatable main shaft inserted in the placement groove, a swingable winding cam and a swingable thread pressing control plate on the mounting seat, one end of the thread pressing control plate is fixedly connected to the winding cam through a connecting shaft, and the other end of the thread pressing control plate extends to the bobbin in the placement groove, an eccentric adjustment pin capable of adjusting the winding cam is also provided on the mounting seat, and a wire cutting knife is provided in the placement groove. The winding device also includes a sensor corresponding to the winding cam and a driving member capable of driving the main shaft to rotate.

[0004] To adjust the amount of thread wound onto bobbin 18, the user loosens locking screw 19, rotates eccentric adjustment pin 6 to the desired amount according to the dial 17, and tightens locking screw 19. This allows the user to intuitively adjust the amount of thread wound onto bobbin 18. However, the aforementioned mechanical adjustment method cannot precisely control the amount of thread wound onto the bobbin, requiring repeated trial and error to determine the appropriate amount. Summary of the Invention

[0005] The utility model aims at solving the above problems in the prior art and provides an electronic wire winder with a simple structure and the ability to accurately control the winding amount.

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

[0007] An electronic wire winder includes a mounting seat, a positioning seat, a rotatable winding reel and a rotatable wrench shaft are provided on the mounting seat, and a driving member for driving the winding reel to rotate is provided on the positioning seat. It is characterized in that a sensor for detecting magnetic field changes is provided on the positioning seat, a wrench and a stop block are respectively provided at one end and the other end of the wrench shaft, a magnet is provided on the stop block, and the sensor is electrically connected to the driving member.

[0008] Its working principle is: when winding is required, the bobbin is placed on the winding disk, and the wrench is pushed to rotate the wrench to the bobbin. The stop block rotates with the wrench, and the sensor detects the magnetic field generated by the magnet. At this time, the stop block is in the initial position. The sensor sends a signal to the driver, which starts and drives the winding disk to rotate. The bobbin rotates with the winding disk and is wound.

[0009] As the winding amount increases, the thread on the bobbin contacts the wrench and gradually pushes the wrench outward until the thread amount is met. The sensor detects that the stop block has reached the corresponding position through the change in the magnetic field of the magnet. The sensor sends a signal to the driver, and the driver stops driving the winding disk. At this time, the winding is completed and the bobbin can be removed.

[0010] This electronic bobbin winder uses a sensor to detect changes in the magnetic field to control the drive element to rotate the bobbin, accurately controlling the amount of thread winding as needed. The electronic bobbin winder uses a separate drive element to rotate the bobbin, independent of the drive source. Installed on the sewing machine casing, it allows for convenient winding.

[0011] In the above-mentioned electronic wire winder, one end of the stop block has a curved section in the shape of an arc, and a crank pin and a tension spring pin are also installed on the mounting seat. A crank is installed on the crank pin, and a tension spring is connected to the tension spring pin. A spring sheet is clamped on the crank, and one end of the spring sheet can abut against the curved section, and the other end of the spring sheet is connected to the tension spring.

[0012] During the winding process, the spring sheet is tangent to the arc-shaped curved section of the stop block, and the spring sheet is deformed but does not return to its original position.

[0013] In the above-mentioned electronic wire winder, a wire cutting knife is provided on the winding reel, and a card slot is also provided on the winding reel. One side of the curved section has a flat section, and the other end of the stop block has a hook. When the end of the spring sheet abuts against the flat section, the hook is engaged in the card slot, and the winding reel stops rotating.

[0014] When the hook is connected to the slot of the winding disk, the winding disk stops rotating (at this time the driving part receives the signal to stop driving the winding disk to rotate). At this time, the upper thread is at the thread cutter, and the thread cutter can easily cut the upper thread on the bobbin. The gap between the thread cutter and the winding disk is very small. After cutting the thread, the thread cutter can firmly clamp the upper thread. When the winding disk rotates next time, it can directly drive the bobbin to wind the thread (no need to manually pre-wind a few turns of thread on the bobbin to avoid uneven winding and knotting or loosening), realizing the integration of thread cutting and winding.

[0015] In the above-mentioned electronic wire winder, the wrench includes a connecting block, the connecting block has a connecting rod 1, the connecting rod 1 has a connecting rod 2, the connecting rod 2 is bent inward and arranged opposite to the connecting rod 1, the connecting rod 1 and the connecting rod 2 are threadedly connected with screws, the screws are passed through a nut, and the nut rests on one side of the connecting rod 1.

[0016] Connecting rod one and connecting rod two form a U-shaped structure. The opening and closing degree of the wrench is adjusted by screws and nuts (i.e., rotating the screw to adjust the distance between connecting rod one and connecting rod two), so that the wrench pops out to complete the precise adjustment of the line amount.

[0017] When the winding amount needs to be adjusted, such as the electronic control input winding amount requirement is 80%, the sensor detects that the stop block reaches the corresponding position through the change of the magnetic field of the magnet, and the sensor sends a signal to the driver. The driver stops driving the winding disk, and the winding stops at this time, but the wrench does not pop out. You only need to adjust the opening and closing degree of the wrench through the screw and nut to make the wrench pop out to complete the precise adjustment of the wire amount. The next time you wind, the wrench will pop out when the wire amount reaches 80%, and the winding will stop at the same time.

[0018] In the above-mentioned electronic wire winder, a winding shaft is mounted on the winding reel, the driving member includes a motor, the motor is mounted on a positioning seat, and the winding shaft is connected to the output shaft of the motor.

[0019] The winding shaft is used to place the bobbin, and the motor drives the winding shaft to rotate, and the winding shaft drives the winding disk and the bobbin to rotate.

[0020] As another embodiment, the motor may be replaced by a rotary cylinder.

[0021] In the above-mentioned electronic wire winder, a boss for positioning the wrench is provided on the mounting seat, and the boss is located on one side of the winding shaft, and the wrench can abut against the boss.

[0022] The boss is used to position the wrench so that the wrench can be accurately rotated to the bobbin when the wrench is pushed.

[0023] In the above-mentioned electronic wire winder, the sensor is a Hall detection sensor.

[0024] The utility model also provides a sewing machine, which comprises any one of the above-mentioned electronic bobbin winders.

[0025] Compared with the prior art, the advantages of the present invention are as follows:

[0026] 1. This electronic bobbin winder uses a sensor to detect changes in the magnetic field to control the drive element to drive the bobbin to rotate, and can accurately control the winding amount as needed.

[0027] 2. The electronic bobbin winder uses a separate drive to drive the bobbin to rotate. It is not restricted by the drive source and can be installed on the casing of the sewing machine to easily realize winding.

[0028] 3. The electronic wire winder is equipped with a wire cutter to realize the functions of wire cutting and winding. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a structural diagram of an electronic wire winder;

[0030] Figure 2 It is a schematic diagram of an electronic bobbin mounted on a bobbin winder;

[0031] Figure 3 It is a structural diagram of the wrench installed on the mounting base;

[0032] Figure 4 It is a schematic diagram of the structure with a spring leaf installed on the crank;

[0033] Figure 5 It is a structural diagram of the winding drum;

[0034] Figure 6 It is a structural diagram of the stop block;

[0035] Figure 7 It is a structural diagram of the electronic wire winder from another perspective.

[0036] In the figure: 1 mounting base, 2 positioning base, 3 winding drum, 4 wrench shaft, 5 sensor, 6 wrench, 7 stop block, 8 magnet, 9 bending section, 10 crank pin, 11 tension spring pin, 12 crank, 13 tension spring, 14 spring sheet, 15 cutting knife, 16 slot, 17 flat section, 18 hook, 19 connecting block, 20 connecting rod 1, 21 connecting rod 2, 22 screw, 23 nut, 24 winding shaft, 25 motor, 26 boss, 27 bobbin. DETAILED DESCRIPTION

[0037] The following are specific embodiments of the present invention, and the technical solutions of the present invention are further described in conjunction with the accompanying drawings, but the present invention is not limited to these embodiments.

[0038] like Figure 1-4 As shown, the electronic wire winder includes a mounting base 1, on which a positioning base 2, a rotatable winding disk 3 and a rotatable wrench shaft 4 are provided. A driving member for driving the winding disk 3 to rotate is provided on the positioning base 2, and a sensor 5 for detecting a change in a magnetic field is provided on the positioning base 2. A wrench 6 and a stop block 7 are provided at one end and the other end of the wrench shaft 4, respectively. A magnet 8 is provided on the stop block 7, and the sensor 5 is electrically connected to the driving member. As an embodiment, the sensor 5 is a Hall detection sensor.

[0039] When winding is required, the bobbin 27 is placed on the winding reel 3, and the wrench 6 is pushed to rotate the wrench 6 to the bobbin 27. The stop block 7 rotates with the wrench 6, and the sensor 5 detects the magnetic field generated by the magnet 8. At this time, the stop block 7 is in the initial position. The sensor 5 sends a signal to the driving part, and the driving part starts and drives the winding reel 3 to rotate. The bobbin 27 rotates with the winding reel 3 and is wound.

[0040] As the winding amount increases, the line on the bobbin 27 comes into contact with the wrench 6 and gradually pushes the wrench 6 outward until the line amount is met. After the sensor 5 detects that the stop block 7 has reached the corresponding position through the change in the magnetic field of the magnet 8, the sensor 5 sends a signal to the driving part, and the driving part stops driving the winding reel 3. At this time, the winding is completed and the bobbin 27 can be removed.

[0041] like Figure 3 、 4 As shown in Figure 6, in this embodiment, one end of the stop block 7 has a curved section 9 in a circular arc shape, and a crank pin 10 and a tension spring pin 11 are also installed on the mounting seat 1. A crank 12 is installed on the crank pin 10, and a tension spring 13 is connected to the tension spring pin 11. A spring sheet 14 is clamped on the crank 12, and one end of the spring sheet 14 can abut against the curved section 9, and the other end of the spring sheet 14 is connected to the tension spring 13.

[0042] During the winding process, the spring leaf 14 is tangent to the arc-shaped curved section 9 of the stop block 7 , and the spring leaf 14 is deformed but does not return to its original position.

[0043] like Figure 1 、 4 , 5 and 6, in this embodiment, a wire cutting knife 15 is provided on the winding drum 3, and a card slot 16 is also provided on the winding drum 3. One side of the curved section 9 has a flat section 17, and the other end of the stop block 7 has a hook 18. When the end of the spring sheet 14 abuts against the flat section 17, the hook 18 is engaged in the card slot 16, and the winding drum 3 stops rotating.

[0044] When the hook 18 is connected to the slot 16 of the winding drum 3, the winding drum 3 stops rotating (at this time the driving part receives the signal to stop driving the winding drum 3 to rotate). At this time, the upper thread is located at the thread cutter 15, and the thread cutter 15 can easily cut the upper thread on the bobbin 27. The gap between the thread cutter 15 and the winding drum 3 is very small. After cutting the thread, the thread cutter 15 can firmly clamp the upper thread. When the winding drum 3 rotates next time, it can directly drive the bobbin 27 to wind the thread (no need to manually pre-wind a few turns of thread on the bobbin to avoid uneven winding and knotting or loosening), thereby realizing integrated thread cutting and winding.

[0045] like Figure 4As shown, in this embodiment, the wrench 6 includes a connecting block 19, a connecting rod 20 is provided on the connecting block 19, a connecting rod 21 is provided on the connecting rod 1 20, the connecting rod 21 is bent inward and arranged opposite to the connecting rod 1 20, and a screw 22 is threadedly connected to the connecting rod 1 20 and the connecting rod 2 21, and a nut 23 is passed through the screw 22, and the nut 23 rests on one side of the connecting rod 1 20.

[0046] Connecting rod 1 20 and connecting rod 2 21 form a U-shaped structure. The opening and closing degree of the wrench 6 is adjusted by the screw 22 and the nut 23 (i.e., rotating the screw 22 to adjust the distance between connecting rod 1 20 and connecting rod 2 21), so that the wrench 6 pops out to complete the precise adjustment of the line amount.

[0047] When the winding amount needs to be adjusted, such as the electronically input winding amount requirement is 80%, the sensor 5 detects that the stop block 7 reaches the corresponding position through the change in the magnetic field of the magnet 8, and the sensor 5 sends a signal to the driver, and the driver stops driving the winding reel 3. At this time, the winding stops, but the wrench 6 does not pop out. It is only necessary to adjust the opening and closing degree of the wrench 6 through the screw 22 and the nut 23 to make the wrench 6 pop out to complete the precise adjustment of the wire amount. The next time the wire is wound, the wrench 6 will pop out when the wire amount reaches 80%, and the winding will stop at the same time.

[0048] like Figure 7 As shown, in this embodiment, a winding shaft 24 is installed on the winding reel 3, and the driving component includes a motor 25. The motor 25 is installed on the positioning seat 2, and the winding shaft 24 is connected to the output shaft of the motor 25.

[0049] The winding shaft 24 is used to place the bobbin 27. The motor 25 drives the winding shaft 24 to rotate, and the winding shaft 24 drives the winding disk 3 and the bobbin 27 to rotate.

[0050] As another embodiment, the motor 25 may be replaced by a rotary cylinder.

[0051] like Figure 1 As shown in FIG2 , in this embodiment, a boss 26 for positioning the wrench 6 is provided on the mounting seat 1 . The boss 26 is located on one side of the winding shaft 24 , and the wrench 6 can abut against the boss 26 .

[0052] The boss 26 is used to position the wrench 6 , so that the wrench 6 can be accurately rotated to the bobbin 27 when the wrench 6 is pushed.

[0053] The utility model also provides a sewing machine, which comprises any one of the above-mentioned electronic bobbin winders.

[0054] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Persons skilled in the art may make various modifications, additions, or substitutions to the described specific embodiments without departing from the spirit of the present invention or exceeding the scope defined by the appended claims.

Claims

1. An electronic wire winder, comprising a mounting base (1), a positioning base (2), a rotatable wire winding disk (3) and a rotatable wrench shaft (4) provided on the mounting base (1), a driving member for driving the wire winding disk (3) to rotate provided on the positioning base (2), characterized in that: A sensor (5) for detecting magnetic field changes is provided on the positioning seat (2); a wrench (6) and a stop block (7) are provided at one end and the other end of the wrench shaft (4), respectively; a magnet (8) is provided on the stop block (7); and the sensor (5) is electrically connected to the driving member.

2. An electronic wire winder according to claim 1, characterized in that: One end of the stop block (7) has a curved section (9) in the shape of an arc, and a crank pin (10) and a tension spring pin (11) are also installed on the mounting seat (1), a crank (12) is installed on the crank pin (10), a tension spring (13) is connected to the tension spring pin (11), and a spring sheet (14) is clamped on the crank (12), one end of the spring sheet (14) can abut against the curved section (9), and the other end of the spring sheet (14) is connected to the tension spring (13).

3. An electronic wire winder according to claim 2, characterized in that: The winding drum (3) is provided with a wire cutting knife (15), and the winding drum (3) is also provided with a clamping groove (16). One side of the curved section (9) has a flat section (17), and the other end of the stop block (7) has a clamping hook (18). When the end of the spring sheet (14) abuts against the flat section (17), the clamping hook (18) is clamped in the clamping groove (16), and the winding drum (3) stops rotating.

4. An electronic wire winder according to claim 1, 2 or 3, characterized in that: The wrench (6) includes a connecting block (19), a connecting rod 1 (20) is provided on the connecting block (19), a connecting rod 2 (21) is provided on the connecting rod 1 (20), the connecting rod 2 (21) is bent inward and arranged opposite to the connecting rod 1 (20), a screw (22) is threadedly connected on the connecting rod 1 (20) and the connecting rod 2 (21), a nut (23) is passed through the screw (22), and the nut (23) is pressed against one side of the connecting rod 1 (20).

5. An electronic wire winder according to claim 1, 2 or 3, characterized in that: A winding shaft (24) is mounted on the winding drum (3), the driving member comprises a motor (25), the motor (25) is mounted on the positioning seat (2), and the winding shaft (24) is connected to an output shaft of the motor (25).

6. An electronic wire winder according to claim 5, characterized in that: The mounting seat (1) is provided with a boss (26) for positioning the wrench (6); the boss (26) is located on one side of the winding shaft (24); and the wrench (6) can abut against the boss (26).

7. An electronic wire winder according to claim 1, 2 or 3, characterized in that: The sensor (5) is a Hall detection sensor (5).

8. A sewing machine, characterized in that: The sewing machine comprises an electronic bobbin winder according to any one of claims 1 to 7.

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