Electricity taking structure of automatic base line replacing device

Abstract

The utility model discloses an electricity taking structure of an automatic bottom line replacing device, the automatic bottom line replacing device operates along a transverse guide mechanism, the electricity taking structure comprises a power transmission circuit which is arranged at the front side of the transverse guide mechanism and extends along the transverse direction, and a contact conductive mechanism which is arranged on the automatic bottom line replacing device, the contact conductive mechanism comprises a fixed seat, an insulating swing arm hinged to the fixed seat through a pin shaft, a first spring arranged between the insulating swing arm and the fixed seat, and a conductive sheet installed on the insulating swing arm, the first spring drives the insulating swing arm to horizontally swing relative to the plane where the power transmission circuit is located with the pin shaft as a fulcrum, and the conductive sheet is elastically attached to the power transmission circuit. According to the utility model, a slingshot type power connection mode is adopted, the counter-acting force of a power transmission circuit on the conducting strip in the operation process is opposite to the swinging direction, and the conducting strip is not easy to deform.

Description

Technical field

[0001] The utility model belongs to the technical field of embroidery equipment, and particularly relates to an automatic bobbin thread changing device for an embroidery machine. [Background Technology]

[0002] The automatic bobbin thread changing device currently on the market achieves the purpose of automatically changing the bobbin thread by automatically replacing the bobbin case and bobbin core. Referring to the Chinese invention patent application with publication number CN110340628A, a multi-station robotic arm bobbin thread changing device is disclosed, which can be responsible for the bobbin thread changing work of several preset stations, and the disassembled bobbin thread and spare bobbin thread are placed in the bobbin thread storage tray. Specifically, the device structure includes a horizontal guide mechanism and a bobbin thread changing device, and the bobbin thread changing device includes a bobbin thread gripper, a rectangular coordinate robotic arm, a translation base, a rotary drive mechanism and a bobbin thread storage tray, and the translation base is slidably connected to the horizontal guide rail. The translation base is provided with a sliding guide seat, and the sliding guide seat is slidably connected to the horizontal guide rail. The guide surface of the horizontal guide rail is provided with two conductive sheets extending along the horizontal guide rail. The translation base is provided with brushes at the corresponding conductive sheet positions. When the translation base slides along the horizontal guide rail, the brushes are always in contact with the conductive sheets and conduct electricity. The brushes include a brush mount and carbon brushes; the brush mount is located on the side of the translation base facing the horizontal guide rail, and two rows of carbon brush cavities are provided on the brush mount facing the horizontal guide rail. A spring is provided in the cavity, and a carbon brush is provided at the end of the spring. The two rows of carbon brushes respectively abut against two conductive sheets and conduct electricity with the conductive sheets. The power supply adopts an electric strip contact power supply method, that is, a copper strip circuit is laid on the horizontal movement path, and a conductive block is provided on the device. One end of the conductive block is affected by the elastic force of the spring, so that the conductive block is closely connected to the copper strip circuit, thereby transmitting electrical energy to the device control board to control the operation of the device. The advantage of this circuit is that it operates stably and solves the problem of traditional devices dragging wires around when running, causing metal fatigue of the wires. However, the disadvantages are also obvious: the conductive block and the driving force spring behind the conductive block are installed vertically on the contact surface of the conductive belt, and the device runs left and right along the conductive belt. When the device runs left and right, the force exerted on the conductive block is not only on the driving force spring behind it, but also on the left and right surfaces where the insulating sleeve that holds the conductive block is in contact with the conductive block. When the device runs left and right, the movement of the conductive block is like a person shaking a small tree left and right. After long-term operation, the friction of the conductive block will cause the insulating sleeve holding the conductive block to deform, and there is a risk of it getting stuck and not conducting electricity. The problem will be more obvious when running at high speed. [Utility Model Content]

[0003] In view of the deficiencies in the prior art, the technical problem to be solved by the present invention is to provide a power supply structure for an automatic bottom thread changing device, which overcomes the risk of jamming and non-conductivity in the prior art where a brush contacts a conductive sheet for conduction.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions: a power-taking structure of an automatic bottom thread changing device, the automatic bottom thread changing device runs along a transverse guide mechanism, the power-taking structure includes a power transmission circuit arranged on the transverse guide mechanism and extending transversely, and a contact conductive mechanism arranged on the automatic bottom thread changing device, the contact conductive mechanism includes a fixed seat, an insulating swing arm rotatably connected to the fixed seat, a first spring arranged between the insulating swing arm and the fixed seat, and a conductive sheet installed on the insulating swing arm, the first spring drives the insulating swing arm to swing relative to the plane where the power transmission circuit is located, and makes the conductive sheet elastically fit the power transmission circuit.

[0005] Preferably, the insulating swing arm is hinged to the fixed seat through a pin shaft, and the first spring drives the insulating swing arm to swing horizontally relative to the plane where the transmission circuit is located with the pin shaft as the fulcrum; and / or, the insulating swing arm is hinged to a branch insulating swing arm through a pin shaft, a second spring is provided between the branch insulating swing arm and the insulating swing arm, a conductive sheet is installed on the branch insulating swing arm, and the second spring drives the branch insulating swing arm to swing horizontally relative to the plane where the transmission circuit is located with the pin shaft as the fulcrum, and makes the conductive sheet elastically fit the transmission circuit.

[0006] Preferably, the conductive sheet is provided with a transverse extension section, and the head of the transverse extension section is in contact with the power transmission circuit; and / or the first spring and the second spring are torsion springs.

[0007] Preferably, the conductive sheet is provided with a horizontal extension section, and the insulating swing arm and the branch insulating swing arm are provided with a horizontal fixing surface which is in contact with the horizontal extension section and fixed by screws.

[0008] Preferably, the lateral guide mechanism is further provided with a communication circuit extending in the lateral direction, and the contact conductive mechanism is provided with a conductive sheet in contact with and conductive to the communication circuit.

[0009] Preferably, the power transmission circuit includes at least two rows of conductive copper bars arranged side by side, and the communication circuit includes at least one row of conductive copper bars.

[0010] Preferably, the lateral guiding mechanism includes an insulating circuit support plate, and the conductive copper strip is mounted on the insulating circuit support plate.

[0011] Preferably, the insulating circuit support plate is provided with a mounting groove for mounting a conductive copper strip.

[0012] Preferably, the transverse guiding mechanism includes a transverse guide rail, and the automatic bottom thread changing device is provided with a transverse slider that is slidably engaged with the transverse guide rail.

[0013] Preferably, the automatic bottom thread changing device is provided with a driving motor, the driving motor is connected to a power output component, the power output component cooperates with the transverse guide mechanism to drive the automatic bottom thread changing device to move, and the driving motor is connected to the contact conductive mechanism.

[0014] The technical solution adopted by the utility model has the following technical effects: a slingshot-type connecting method is adopted, a first spring drives the insulating swing arm to swing horizontally relative to the plane where the transmission circuit is located with the pin shaft as the fulcrum, and the conductive sheet is elastically fitted to the transmission circuit. The reaction force of the transmission circuit applied to the conductive sheet during operation is opposite to the swinging direction, and the conductive sheet is not easily deformed, thereby overcoming the risk of stuck and non-conductivity in the prior art that uses brushes to contact the conductive sheet for conduction.

[0015] Moreover, the slingshot-type charging method has been used in trams and high-speed railways for many years, and its efficient and stable performance has been fully verified. Applying it to the automatic bottom thread changing device can greatly improve the stability and service life of the automatic bottom thread changing device. At the same time, it can also further increase the operating speed of the automatic bottom thread changing device and improve its efficiency.

[0016] These features and advantages of the present invention will be disclosed in detail in the following specific embodiments and drawings.

Brief Description of the Drawings

[0017] The utility model is further described below with reference to the accompanying drawings:

[0018] Figure 1 This is a partial structural diagram of a multi-station automatic bottom thread changing device;

[0019] Figure 2 This is a side view of the multi-station automatic bottom thread changing equipment with the automatic bottom thread changing device located on the side of the storage tray;

[0020] Figure 3 yes Figure 2 A in the middle is an enlarged structural diagram;

[0021] Figure 4 It is a schematic diagram of the structure of the conductive copper sheet and the insulating circuit support plate;

[0022] Figure 5 This is a schematic diagram of the automatic bottom thread changing device running along the transverse guide mechanism;

[0023] Figure 6 It is a structural diagram of the contact conductive mechanism;

[0024] Figure numerals: automatic bottom thread changing device 1, main body 11, storage tray 12, manipulator assembly 13, transverse slider 14, contact conductive mechanism 15, fixed seat 151, insulating swing arm 152, conductive sheet 153, transverse extension section 1531, horizontal extension section 1532, branch insulating swing arm 154, pin 155, torsion spring 156, power drive assembly 16, drive motor 161, drive gear 162, transverse guide mechanism 2, bracket 20, transverse guide rail 21, transverse rack 22, insulating circuit support plate 23, mounting groove 231, conductive copper bar 232, shuttle box body 3, rotary hook 31, bobbin core 32, bobbin case 33. [Specific implementation method]

[0025] The following is an explanation and description of the technical solutions of the embodiments of the present invention in conjunction with the drawings of the embodiments of the present invention, but the following embodiments are only preferred embodiments of the present invention and are not exhaustive. Based on the embodiments in the embodiments, other embodiments obtained by those skilled in the art without creative work are all within the scope of protection of the present invention.

[0026] Those skilled in the art will appreciate that, unless there is any conflict, the features in the following embodiments and implementations may be combined with each other.

[0027] The terms used in this utility model are for the purpose of describing specific embodiments only and are not intended to limit the utility model. For example, the terms "upper," "lower," "front," "rear," "X-direction," "Y-direction," and the like, which indicate orientation or positional relationships, are based solely on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the utility model. They do not indicate or imply that the device or element referred to must have a specific orientation or be constructed or operated in a specific orientation. Therefore, they should not be construed as limiting the utility model.

[0028] In this utility model, unless otherwise specified or limited, the terms "installation," "connection," "fixation," etc. should be understood in a broad sense. For example, they may refer to fixed connection, detachable connection, or integral connection; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0029] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0030] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be understood to indicate or imply relative importance or to implicitly indicate the quantity of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features.

[0031] like Figure 1 As shown, the multi-station automatic bobbin changing device includes a transverse guide mechanism 2 and an automatic bobbin changing device 1. For multi-head embroidery machines, multiple machine head and shuttle housing combinations are arranged horizontally. The upper portion is the machine head, and the lower portion corresponds to the shuttle housing 3. The shuttle housing 3 houses a rotary hook 31 and the bobbin thread mounted thereon. The bobbin thread here refers to the bobbin core 32 and bobbin case 33 combination used to hold the bobbin thread. When the bobbin thread runs out, it needs to be replaced, and the automatic bobbin changing device 1 is used to do this. The transverse guide mechanism 2 is positioned below the shuttle housing 3 and extends horizontally, sufficient to cover the entire length of the shuttle housing 3. This ensures that the automatic bobbin changing device 1 can move along the transverse guide mechanism 2 and reach the corresponding position in the shuttle housing 3 to complete the bobbin thread changing process. The number of automatic bobbin changing devices 1 can be one or more. As the number of heads in multi-head embroidery machines increases, multiple automatic bobbin changing devices 1 are typically installed, each responsible for changing the bobbin thread for a corresponding number of machine head and shuttle housing combinations.

[0032] The automatic bobbin thread changing device 1 includes a storage tray 12 for placing multiple bobbin threads and a manipulator assembly 13 for automatically changing the bobbin thread. The storage tray 12 and the manipulator assembly 13 are mounted on the body 11. The storage tray 12 can rotate. The storage tray is provided with multiple storage positions for placing bobbin threads along the circumference, and at least one empty position is reserved. The manipulator assembly 13 replaces the used bobbin thread on the rotary hook and places it on the empty position of the storage tray 12, and places the unused bobbin thread on the storage tray 12 on the rotary hook. Of course, if there is no unused bobbin thread on the storage tray, the entire storage tray needs to be replaced.

[0033] Therefore, the method used by the prior art automatic bobbin changing device 1 to change the bobbin thread is as follows: a storage tray is equipped with a bobbin core and a bobbin case with a pre-wound bobbin thread, referred to herein as a bobbin thread, which generally stores 10 pre-wound bobbins, and a space is reserved for the next bobbin thread to be replaced. When the bobbin thread needs to be replaced, the manipulator assembly 13 removes the empty bobbin thread from the shuttle on the embroidery machine and places it in the space reserved in the storage tray. Then, the manipulator assembly 13 is lifted, and the storage tray 12 rotates, rotating the pre-wound bobbin thread to a position where the manipulator assembly 13 can grab it. At this time, the manipulator assembly 13 grabs a pre-wound bobbin thread and places it in the shuttle of the embroidery machine, completing the replacement of the bobbin thread of one head of the embroidery machine. When the bobbin thread corresponding to the next head needs to be replaced, the automatic bobbin thread changing device with the storage tray 12 moves along the transverse guide mechanism 2 to the next head position, and then the manipulator assembly 13 repeats the cycle of the first head bobbin thread replacement action to complete the replacement of the second head bobbin thread, and so on, completing the replacement of the corresponding bobbin threads of the entire embroidery machine head.

[0034] Embroidery machines typically have different numbers of automatic bobbin changers depending on the number of heads. Currently, there's typically one automatic bobbin changer for every ten heads. Once the entire machine's bobbin thread is replaced, all the automatic bobbin changers move along the transverse guide mechanism 2 to one end of the machine, waiting for the worker to replace the empty bobbin storage tray with a fully wound one. Once the replacement is complete, the reset button is manually pressed to reset each automatic bobbin changer to its initial position, ready for the next job. This completes the machine's automatic bobbin change function.

[0035] Reference Figure 1 As shown, the automatic bobbin thread changing device 1 is provided with a power drive assembly 16, which cooperates with the transverse guide mechanism 2 to achieve the lateral movement of the automatic bobbin thread changing device along the transverse guide mechanism 2. A power supply structure is provided between the automatic bobbin thread changing device 1 and the transverse guide mechanism 2 for supplying power to the power drive assembly 16.

[0036] In order to avoid the risk of jamming and non-conductivity in the existing power supply method, the power supply method between the automatic bottom thread changing device 1 and the transverse guide mechanism 2 can be improved, for example, a slingshot power supply method can be adopted.

[0037] like Figures 1 to 6 As shown, the power taking structure includes a power transmission circuit provided on the front side of the transverse guide mechanism 1 and extending in the transverse direction, and a contact conductive mechanism 15 provided on the automatic bottom thread changing device 1 .

[0038] The plane where the power transmission circuit is located is arranged vertically. The contact conductive mechanism includes a fixed seat 151, an insulating swing arm 152 hinged to the fixed seat through a pin 155, a first spring arranged between the insulating swing arm and the fixed seat, and a conductive sheet 153 installed on the insulating swing arm. The first spring drives the insulating swing arm to swing horizontally relative to the plane where the power transmission circuit is located with the pin as the fulcrum, and makes the conductive sheet elastically fit the power transmission circuit.

[0039] Furthermore, the insulating swing arm 152 is hingedly connected to a branch insulating swing arm 154 via a pin. A second spring is provided between the branch insulating swing arm 154 and the insulating swing arm 152. A conductive sheet 153 is mounted on the branch insulating swing arm 154. The second spring drives the branch insulating swing arm to swing horizontally relative to the plane of the power transmission circuit with the pin as the fulcrum, and causes the conductive sheet to elastically conform to the power transmission circuit.

[0040] Preferably, the first and second springs are torsion springs 156, which are mounted on pins 155 and drive the insulating swing arm 152 and the branch insulating swing arm 154 to twist. Consequently, under the action of the torsion springs, the insulating swing arm and the branch insulating swing arm both swing toward the transverse guide mechanism 2, causing the conductive sheet 153 to contact the power transmission circuit for electrical conduction.

[0041] Furthermore, the conductive sheet 153 is provided with a transverse extension section 1531, the head of which is in contact with the power transmission circuit. The conductive sheet 153 is provided with a horizontal extension section 1532. The insulating swing arm 152 and the branch insulating swing arm 154 are provided with horizontal fixing surfaces that are in contact with the horizontal extension section 1532 and are fixed by screws, thereby fixing the conductive sheet 153 to the insulating swing arm 152 and the branch insulating swing arm 154.

[0042] The above-mentioned power supply structure adopts a slingshot-type power supply method. The first spring drives the insulating swing arm to swing horizontally relative to the plane where the transmission circuit is located with the pin shaft as the fulcrum, and makes the conductive sheet elastically fit the transmission circuit. The reaction force exerted on the conductive sheet by the transmission circuit during operation is opposite to the swinging direction, which makes it difficult for the conductive sheet to deform. This overcomes the risk of jamming and non-conductivity in the existing technology that uses brushes to contact the conductive sheet for conduction.

[0043] Moreover, the slingshot-type charging method has been used in trams and high-speed railways for many years, and its efficient and stable performance has been fully verified. Applying it to the automatic bottom thread changing device can greatly improve the stability and service life of the automatic bottom thread changing device. At the same time, it can also further increase the operating speed of the automatic bottom thread changing device and improve its efficiency.

[0044] In addition, the existing technology uses wireless communication for signal transmission between the automatic bottom line changing device and the host. Although wireless communication has been widely used, it encounters interference in some special situations when using wireless communication, and often encounters the phenomenon of poor information communication. If the device is installed near the interference source, it will not work. The only solution is to move the factory, which increases the customer's operating costs. To address this problem, the utility model combines the slingshot-type power supply method with the communication function, that is, the horizontal guide mechanism 2 is also provided with a communication circuit extending in the horizontal direction, and the contact conductive mechanism 15 is provided with a conductive sheet that is in contact with the communication circuit.

[0045] The communication circuit and the power transmission circuit share the same structure, both utilizing conductive copper bars 232. Specifically, the transverse guide mechanism 2 comprises a bracket 20, a transverse guide rail 2 mounted thereto, and an insulating circuit support plate 23. The power transmission and communication circuits are mounted on the insulating circuit support plate 23. In this embodiment, the power transmission circuit comprises at least two sets of conductive copper bars 232 arranged side by side, while the communication circuit comprises at least one row of conductive copper bars 232. Furthermore, the insulating circuit support plate 23 is provided with mounting slots 231 for mounting the conductive copper bars.

[0046] In this way, not only a power transmission circuit but also a communication circuit is laid on the transverse guide mechanism 2, that is, a "power transmission plus signal communication type electric shock guide rail" is formed. As shown in the figure, the "power transmission plus signal communication type electric shock guide rail" uses four rows of wires, that is, two power lines and two signal lines. For example, the two rows of wires on the upper side are power lines, which correspond to the conductive sheet 153 connected to an insulating swing arm 152 and a branch insulating swing arm 154 on the upper side, and the two rows of wires on the lower side are communication signal lines, which correspond to the conductive sheet 153 connected to an insulating swing arm 152 and a branch insulating swing arm 154 on the lower side. However, the functions required by this device can be completed by using three rows of wires, that is, two power lines and one signal line, or five rows of wires or more rows of wires. Of course, if the communication function is not considered, two power lines are sufficient, but if the communication function is considered, at least three rows of wires are required.

[0047] The above technical solution, since the contact conductive mechanism 15 adopts a slingshot contact conductive method with the power transmission circuit and the communication circuit, not only ensures the stability of the power supply, but also avoids the signal interference problem to the greatest extent, thereby ensuring the stable operation of the equipment under various complex situations.

[0048] Each automatic bobbin thread changing device 1 is equipped with a power drive assembly 16, which includes a drive motor 161 and a power output component connected to the drive motor. The power output component cooperates with the transverse guide mechanism to drive the automatic bobbin thread changing device. The drive motor is connected to the contact conductive mechanism. Here, the power output component is a drive gear 162, and the drive motor 161 is connected to the contact conductive mechanism 15, and power is supplied to the drive motor 161 through contact conductive mechanism.

[0049] Of course, referring to the prior art, the transverse guide mechanism 2 is further provided with a transverse rack 22 arranged parallel to the transverse guide rail 21. The drive motor 161 is connected to a drive gear 162, which meshes with the transverse rack 22. The drive motor 161 drives the drive gear 162, thereby driving the entire automatic bottom thread changing device 1 to translate on the transverse guide rail 21 and accurately position it.

[0050] Preferably, the transverse rack 22 is provided below the transverse guide rail 21 with its tooth surface facing downward. The driving gear is a spur helical gear. The automatic bottom thread changing device 1 is provided with a transverse slider 14 that is slidably engaged with the transverse guide rail 21.

[0051] It is understandable that the transmission structure of the driving gear 162 and the transverse rack 22 can also be replaced by other transmission structures such as a sprocket and chain, a synchronous belt and a synchronous pulley.

[0052] The above description is merely a specific embodiment of the utility model, but the scope of protection of the utility model is not limited thereto. Those skilled in the art will understand that the utility model includes, but is not limited to, the contents described in the drawings and the above specific embodiments. Any modifications that do not deviate from the functional and structural principles of the utility model are intended to be included within the scope of the claims.

Claims

1. The power supply structure of the automatic bobbin thread changing device runs along the transverse guide mechanism, which is characterized by: The power-taking structure includes a power transmission circuit arranged on a lateral guide mechanism and extending laterally, and a contact conductive mechanism arranged on an automatic bottom line changing device. The contact conductive mechanism includes a fixed seat, an insulating swing arm rotatably connected to the fixed seat, a first spring arranged between the insulating swing arm and the fixed seat, and a conductive sheet installed on the insulating swing arm. The first spring drives the insulating swing arm to swing relative to the plane where the power transmission circuit is located, and makes the conductive sheet elastically fit the power transmission circuit.

2. The power supply structure of the automatic bottom thread changing device according to claim 1, characterized in that: The insulating swing arm is hinged to the fixed seat through a pin shaft, and the first spring drives the insulating swing arm to swing horizontally relative to the plane where the transmission circuit is located with the pin shaft as the fulcrum; and / or, the insulating swing arm is hinged to a branch insulating swing arm through a pin shaft, a second spring is provided between the branch insulating swing arm and the insulating swing arm, and a conductive sheet is installed on the branch insulating swing arm, and the second spring drives the branch insulating swing arm to swing horizontally relative to the plane where the transmission circuit is located with the pin shaft as the fulcrum, and makes the conductive sheet elastically fit the transmission circuit.

3. The power supply structure of the automatic bottom thread changing device according to claim 2, characterized in that: The conductive sheet is provided with a transverse extension section, and the head of the transverse extension section is in contact with the power transmission circuit; and / or the first spring and the second spring are torsion springs.

4. The power supply structure of the automatic bottom thread changing device according to claim 3, characterized in that: The conductive sheet is provided with a horizontal extension section, and the insulating swing arm and the branch insulating swing arm are provided with a horizontal fixing surface which is in contact with the horizontal extension section and fixed by screws.

5. The power supply structure of the automatic bottom thread changing device according to claim 1, characterized in that: The lateral guide mechanism is further provided with a communication circuit extending in the lateral direction, and the contact conductive mechanism is provided with a conductive sheet in contact with and conductive to the communication circuit.

6. The power supply structure of the automatic bottom thread changing device according to claim 5, characterized in that: The power transmission circuit includes at least two rows of conductive copper bars arranged side by side, and the communication circuit includes at least one row of conductive copper bars.

7. The power supply structure of the automatic bottom thread changing device according to claim 6, characterized in that: The lateral guide mechanism includes an insulating circuit support plate, and the conductive copper strip is mounted on the insulating circuit support plate.

8. The power supply structure of the automatic bottom thread changing device according to claim 7, characterized in that: The insulating circuit support plate is provided with a mounting groove for mounting a conductive copper strip.

9. The power supply structure of the automatic bottom thread changing device according to claim 1, characterized in that: The transverse guide mechanism includes a transverse guide rail, and the automatic bottom thread changing device is provided with a transverse slider that is slidably matched with the transverse guide rail.

10. The power supply structure of the automatic bottom thread changing device according to claim 9, characterized in that: The automatic bobbin thread changing device is provided with a driving motor, the driving motor is connected to a power output component, the power output component cooperates with the transverse guide mechanism to drive the automatic bobbin thread changing device to move, and the driving motor is connected to the contact conductive mechanism.

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