Bottom thread feeding device capable of automatically winding bottom thread and automatic bottom thread winding machine

Abstract

The present invention relates to a bobbin thread guiding device capable of automatically winding the bobbin thread and an automatic bobbin thread winding machine thereof, comprising: a clamp assembly, a clamp driving assembly, three moving assemblies and a bobbin set movement mechanism. The clamp driving assembly drives the movable clamp of the clamp assembly to selectively move away from or close to the fixed clamp of the clamp assembly, so that the clamp assembly can be switched to three different states. The three moving assemblies can drive the clamp assembly to move forward and backward, left and right, and up and down. The bobbin set movement mechanism can drive the bobbin and the bobbin case to rotate respectively. Thus, the clamp assembly can clamp the bobbin thread with different clamping forces according to different states. Furthermore, when the clamp assembly drives the bobbin thread to slide through the moving assembly, the bobbin thread can present different thread tensions. Moreover, the clamp assembly can cooperate with the rotating bobbin set to install the bobbin thread on the bobbin set.

Description

Technical Field

[0001] The present invention relates to a bobbin thread guiding device that can not only wind the bobbin thread around a bobbin but also install the bobbin thread in a bobbin case, and particularly to a bobbin thread guiding device in which a movable jig of a jig assembly can be changed into different states, so that the jig assembly can clamp the bobbin thread with different clamping forces. Furthermore, when a moving assembly drives the jig assembly to move, the bobbin thread can slide relative to the jig assembly, thereby preventing the jig assembly from pulling out the bobbin thread wound around the bobbin to the outside of the bobbin case to avoid an excessive length of the bobbin thread between the jig assembly and the bobbin assembly. Background Art

[0002] When a sewing machine using the lockstitch principle performs a sewing operation on a sewing material, whether a full-rotation rotating hook or a semi-rotation oscillating hook is used, a bobbin that needs to wind the bobbin thread is required. Moreover, most sewing machines using the lockstitch principle have a bobbin case that can accommodate the bobbin.

[0003] However, in order to increase the rotational speed of the sewing machine, the diameter of the bobbin cannot be too large, which relatively limits the length of the bobbin thread. As a result, the bobbin needs to be frequently replaced to avoid running out of the bobbin thread. Moreover, when replacing the bobbin thread, not only must the sewing machine stop the sewing operation, but even the operator must manually replace the bobbin thread, which relatively cannot improve the production efficiency.

[0004] To overcome the above-mentioned drawbacks, there is currently an automatic bobbin changing device in the sewing machine industry. When it detects that the bobbin thread wound around the bobbin is about to run out, the automatic bobbin changing device will remove the bobbin case and the bobbin from the rotating hook at the same time, so that both the bobbin case and the bobbin are separated from the rotating hook, and then install another set of rotating cases and bobbins with full bobbin threads on the rotating hook at the same time to achieve the effect of automatically changing the bobbin. However, even though the automatic bobbin changing device can separate the bobbin with the nearly exhausted bobbin thread from the rotating hook, the automatic bobbin changing device cannot assist the operator in winding the bobbin thread around the bobbin and guiding the bobbin thread into the wire groove of the bobbin case, resulting in the operator having to manually guide the bobbin thread into the wire groove of the bobbin case, thus occupying the operator's working time.

[0005] In order to eliminate the operation time for the operator to manually introduce the bobbin thread into the bobbin case, the sewing machine industry has currently developed a bobbin thread introduction device to automatically wind the bobbin thread around the bobbin core and automatically introduce the bobbin thread into the wire groove of the bobbin case. In order to introduce the bobbin thread into the wire groove of the bobbin case, the bobbin thread introduction device must clamp the bobbin thread during the process of introducing the bobbin thread into the wire groove, so that the bobbin thread cannot slide relative to the bobbin thread introduction device. Furthermore, during the process of the bobbin thread introduction device introducing the bobbin thread into the wire groove, the bobbin thread introduction device will pull out the bobbin thread wound around the bobbin core to the outside of the bobbin case, making the length of the bobbin thread between the bobbin thread introduction device and the bobbin case too long and presenting a slack state, resulting in the bobbin thread between the bobbin thread introduction device and the bobbin case being easily knotted or wound around other positions of the bobbin case. Summary of the Invention

[0006] The main object of the present invention is to provide a bobbin thread introduction device capable of automatically winding the bobbin thread and an automatic bobbin thread winding machine thereof, which improves the structural composition of the bobbin thread introduction device, enables the fixture assembly to selectively move forward and backward, left and right, or up and down, and the movable fixture of the fixture assembly can switch three different states, so that the fixture assembly can clamp the bobbin thread with different clamping forces. Furthermore, when the fixture assembly moves while clamping the bobbin thread, the bobbin thread can slide relative to the fixture assembly to prevent the fixture assembly from pulling out the bobbin thread wound around the bobbin core to the outside of the bobbin case, and at the same time prevent the bobbin thread between the fixture assembly and the bobbin core from presenting a slack state, relatively avoiding the phenomenon that the bobbin thread between the fixture assembly and the bobbin core is knotted or wound around other positions of the bobbin case.

[0007] To achieve the foregoing object, the present invention provides a bobbin thread introduction device capable of automatically winding the bobbin thread for installing a bobbin thread on a bobbin core and a bobbin case, characterized in that it comprises:

[0008] A bobbin thread clamping mechanism having a fixture assembly and a fixture driving assembly, the fixture assembly is provided with a fixed fixture and a movable fixture, and the fixture driving assembly is used to drive the movable fixture to approach the fixed fixture, so that the fixture assembly can be switched between an open state where the movable fixture is away from the fixed fixture, a clamping state where the bobbin thread can relatively slide on the fixture assembly, and a fastening state where the bobbin thread is restricted from relatively sliding on the fixture assembly;

[0009] A fixture moving mechanism having a left and right moving assembly, a front and back moving assembly, and an up and down moving assembly, the left and right moving assembly can drive the bobbin thread clamping mechanism to move left and right, the front and back moving assembly can drive the bobbin thread clamping mechanism to move back and forth, and the up and down moving assembly can drive the bobbin thread clamping mechanism to move up and down; and

[0010] A bobbin core group movement mechanism has a bobbin core rotation source, a bobbin case rotation source, and a bobbin case movement source. The bobbin core rotation source drives the bobbin core to rotate, so that the bobbin thread is wound around the bobbin core. The bobbin case rotation source drives the bobbin case to rotate, so that the bobbin thread is installed in the bobbin case. And the bobbin case movement source drives the bobbin case to selectively move away from or close to the bobbin core.

[0011] In the bottom thread introducing device capable of automatically winding the bottom thread, the bobbin core group movement mechanism further has a bobbin core turntable assembled on the bobbin core and a bobbin case movable rod assembled on the bobbin case. A blade is installed on the bobbin core turntable, and the clamping fixture assembly can contact the bottom thread with the blade through the front-back movement assembly and the up-down movement assembly.

[0012] In the bottom thread introducing device capable of automatically winding the bottom thread, the bottom thread introducing device further has a bottom thread detection mechanism. The bottom thread detection mechanism has a detection assembly and a detection driving assembly. The detection assembly can be buckled into a slot formed in the bobbin case through the detection driving assembly, so that the bobbin core can be prevented from detaching from the bobbin core turntable.

[0013] In the bottom thread introducing device capable of automatically winding the bottom thread, the detection assembly has a contact rod that can be buckled into the slot and a connecting rod connected to the detection driving assembly. The contact rod is pivotally connected to the connecting rod, so that the contact rod can selectively approach or move away from the connecting rod. And a detection spring that can push the contact rod is arranged between the connecting rod and the contact rod, so that the contact rod can be deflected away from the connecting rod through the detection spring.

[0014] In the bottom thread introducing device capable of automatically winding the bottom thread, the clamping fixture driving assembly has a clamping driving source, a fastening driving source, and an opening spring. The clamping driving source is used to push the movable clamping fixture to move so that the clamping fixture assembly presents the clamping state. The fastening driving source is used to push the movable clamping fixture to move so that the clamping fixture assembly presents the fastening state. And the opening spring is used to pull the movable clamping fixture, so that the clamping fixture assembly can be kept in the opening state.

[0015] In the bottom thread introducing device capable of automatically winding the bottom thread, one of the fixed clamping fixture and the movable clamping fixture has a clamping groove, and the other has a clamping block. When the clamping fixture assembly presents the opening state, the clamping block is located outside the clamping groove. When the clamping fixture assembly presents the clamping state, a part of the clamping block is located inside the clamping groove. And when the clamping fixture assembly presents the fastening state, the whole clamping block is located inside the clamping groove.

[0016] The described bottom thread guiding device capable of automatically winding the bottom thread, wherein both the left and right moving components and the up and down moving components are connected to the front and back moving component, and when the front and back moving component drives the bottom thread clamping mechanism to move back and forth, the left and right moving components and the up and down moving components move back and forth synchronously with the bottom thread clamping mechanism through the front and back moving component.

[0017] The described bottom thread guiding device capable of automatically winding the bottom thread, wherein the bobbin case has a spiral wire hook that can be restricted to the position of the bottom thread. The spiral wire hook has a mounting section, a spiral section, and an extension section located between the mounting section and the spiral section, and the bottom thread clamping mechanism can introduce the bottom thread from the extension section into the interior of the spiral section through the front and back moving component and the bobbin case rotation source.

[0018] An automatic bottom thread winding machine having the described bottom thread guiding device capable of automatically winding the bottom thread, which includes:

[0019] A bottom thread cleaning device for separating the bottom thread from the bobbin; and

[0020] A bobbin replacement device capable of moving the bobbin from the bottom thread cleaning device to the bottom thread guiding device.

[0021] The feature of the present invention is that the clamp driving component can drive the movable clamp of the clamp component to move, enabling the clamp component to selectively switch to an open state, a clamping state, or a fastening state, so that the clamp component can clamp the bottom thread with different clamping forces. Thus, the clamp component can not only selectively move back and forth, left and right, or up and down, but also clamp the bottom thread with different clamping forces. Furthermore, when the clamp component moves while clamping the bottom thread, the bottom thread can slide relative to the clamp component to prevent the clamp component from pulling the bottom thread wound on the bobbin out of the bobbin case, and at the same time prevent the bottom thread between the clamp component and the bobbin from becoming slack, relatively avoiding the occurrence of knotting or winding of the bottom thread between the clamp component and the bobbin to other positions of the bobbin case. Description of the Drawings

[0022] Figure 1 Is a perspective view of the automatic bottom thread winding machine of the present invention;

[0023] Figure 2 Is an exploded view of the automatic bottom thread winding machine of the present invention;

[0024] Figure 3 Is an exploded view of the bobbin set;

[0025] Figure 4 Is Figure 2 A perspective view of the bottom thread guiding device in

[0026] Figure 5 is Figure 2 Another perspective three-dimensional view of the bobbin thread inlet device;

[0027] Figure 6 is Figure 4 Exploded view of the bobbin set movement mechanism;

[0028] Figure 7 is Figure 4 Cross-sectional view of the bobbin set movement mechanism;

[0029] Figure 8 Schematic diagram of the bobbin installed on the bobbin turntable;

[0030] Figure 9 is Figure 4 Exploded view of the bobbin thread clamping mechanism assembled on the fixture moving mechanism;

[0031] Figure 10A Schematic diagram of the fixture assembly in the open state;

[0032] Figure 10B Schematic diagram of the fixture assembly in the clamping state;

[0033] Figure 10C Schematic diagram of the fixture assembly in the tightened state;

[0034] Figure 11 is Figure 5 Exploded view of the bobbin thread detection mechanism;

[0035] Figure 12 is Figure 5 Exploded view of the thread clamping release mechanism;

[0036] Figure 13 is Figure 5 Exploded view of the bobbin thread limit mechanism;

[0037] Figure 14A Schematic diagram of the base of the sewing machine body installing the bobbin thread;

[0038] Figure 14B Schematic diagram of the bobbin set moving device moving the bobbin set to the bobbin thread cleaning device and the bobbin thread inlet device;

[0039] Figure 15A Schematic diagram of the bobbin set installed on the bobbin set movement mechanism;

[0040] Figure 15B Schematic diagram of the contact rod entering the slot;

[0041] Figure 15C Schematic diagram of the bobbin case separated from the bobbin;

[0042] Figure 15DSchematic diagram of winding the bobbin thread around the bobbin as the bottom line;

[0043] Figure 15E and Figure 15F Schematic diagram of the blade moving away from the contact platform to make way for winding the bobbin thread around the bobbin within the clamping space;

[0044] Figure 15G Schematic diagram of the bobbin being full of the bobbin thread;

[0045] Figure 15H Schematic diagram of the detection component moving away from the bobbin;

[0046] Figure 16A Schematic diagram of both the blade and the contact platform moving away from the fixture assembly;

[0047] Figure 16B Schematic diagram of the fixture assembly clamping the bobbin thread;

[0048] Figure 16C Schematic diagram of the bobbin case moving backward to touch the bobbin thread;

[0049] Figure 16D Schematic diagram of guiding the bobbin thread into the wire groove;

[0050] Figure 16E Schematic diagram of pulling the bobbin thread into the space between the shell wire clamping spring pieces;

[0051] Figure 16F Schematic diagram of the bobbin thread passing through the communication hole;

[0052] Figure 16G 、 Figure 16H and Figure 16I Schematic diagram of moving the bobbin thread into the spiral section;

[0053] Figure 17A Schematic diagram of the fixture assembly driving the bobbin thread to move backward and upward;

[0054] Figure 17B Schematic diagram of the bobbin thread located between the blade and the bobbin turntable;

[0055] Figure 17C Schematic diagram of the bobbin thread contacting the blade part;

[0056] Figure 17D Schematic diagram of cutting off the bobbin thread;

[0057] Figure 17E Schematic diagram of the fixture assembly moving away from the bobbin set.

[0058] Description of reference numerals in the drawings: 1 - Automatic bottom thread winding machine; 10 - Sewing machine body; 11 - Base; 12 - Thread tension controller; 20 - Bobbin replacement device; 30 - Bottom thread cleaning device; 40 - Bottom thread guiding device; 41 - Bobbin set movement mechanism; 411 - Bobbin set movable component; 411a - Bobbin turntable; 411a1 - Contact platform; 411b - Bobbin case movable rod; 411c - Blade; 411c1 - Blade edge part; 411c2 - Fixed part; 411c3 - Deformation part; 411d - Rotating sleeve; 411e - Synchronization unit; 411e1 - Synchronization chute; 411e2 - Synchronization convex post; 412 - Bobbin rotation component; 412a - Bobbin rotation source; 412b - Rotating bobbin transmission unit; 412b1 - Bobbin drive pulley; 412b2 - Bobbin driven pulley; 412b3 - Bobbin belt; 413 - Bobbin case rotation component; 413a - Bobbin case rotation source; 413b - Rotating bobbin case transmission unit; 413b1 - Bobbin case drive pulley; 413b2 - Bobbin case driven pulley; 413b3 - Bobbin case belt; 414 - Bobbin case movement component; 414a - Bobbin case movement source; 414b - Bobbin case transmission part; 42 - Fixture movement mechanism; 421 - Forward and backward movement component; 421a - Forward and backward drive source; 421b - Forward and backward movement plate; 421c - Switching unit; 421c1 - Gear; 421c2 - Rack; 422 - Up and down movement component; 422a - Up and down drive source; 422b - Up and down movement plate; 423 - Left and right movement component; 423a - Left and right drive source; 423b - Left and right movement plate; 43 - Bottom thread clamping mechanism; 431 - Fixture component; 431a - Fixed fixture; 431a1 - Clamping groove; 431b - Movable fixture; 431b1 - Clamping block; 432 - Fixture drive component; 432a - Clamping drive source; 432b - Tightening drive source; 432c - Opening spring; 432d - Clamping telescopic rod; 432e - Tightening telescopic rod; 432f - Hooking plate; 44 - Bottom thread detection mechanism; 441 - Detection component; 441a - Connecting rod; 441b - Contact rod; 441b1 - Contact rod pivot part; 411b2 - Induction part; 411b3 - Contact part; 441c - Sensor; 441d - Detection spring; 442 - Detection drive component; 442a - Detection drive source; 442b - Detection telescopic rod; 45 - Thread clamping release mechanism; 451 - Release rod; 451a - Release rod pivot part; 451b - Acting part; 451c - Pushing part; 452 - Release drive source; 46 - Bottom thread limiting mechanism; 461 - Limiting frame; 461b - Adjusting plate; 461b1 - Through hole; 461c - Pushing post; 462 - Limiting spring; 463 - Limiting drive source; 47 - Positioning mechanism; 471 - Guiding component; 471a - Magnet; 472 - Positioning component; 472a - Protrusion; 472b - Positioning hole; 50 - Bobbin set; 51 - Bobbin; 511 - Thread winding shaft part; 512 - Side plate; 513 - Winding space; 52 - Bobbin case521 - housing; 521a - shuttle shaft; 521b - connection end; 521c - open end; 521d - accommodation space; 521e - communication hole; 521f - wire hole; 521g - slot; 521h - wire groove; 522 - wire clamping spring piece; 522a - guiding port; 523 - latch group; 524 - spiral wire hanger; 524a - installation section; 524b - spiral section; 524c - extension section; 525 - screw; 60 - bottom thread; S - clamping space; P1 - open state; P2 - clamping state; P3 - fastening state.; Detailed implementation manner

[0059] The present invention will be further described below in conjunction with specific embodiments and drawings, and the advantages and features of the present invention will become clearer as the description progresses.

[0060] In this schematic diagram, the X-axis direction refers to the left-right direction in which the operator operates the sewing machine, the Y-axis direction refers to the front-back direction in which the operator operates the sewing machine, and the Z-axis direction refers to the up-down direction in which the operator operates the sewing machine. Furthermore, in the description of this case, directional terms such as "front", "back", "left", "right", "up", and "down" refer to the direction faced by the operator when operating the sewing machine.

[0061] Please refer to Figure 1 and Figure 2 as shown, the automatic bobbin winder 1 of the present invention is used in cooperation with a bobbin set 50 (as Figure 3 shown), and the automatic bobbin winder 1 is connected to a base 11 of a sewing machine body 10 (the schematic diagram only shows a partial state of the base 11). Moreover, the automatic bobbin winder 1 has a bobbin replacement device 20, a bottom thread cleaning device 30, and a bottom thread guiding device 40. In this embodiment, the lower shaft can drive a rotating shuttle (not shown) assembled on the base 11 to rotate. Among them, a thread tension controller 12 is installed on the base 11, and the thread tension controller 12 can clamp a bottom thread 60 (as Figure 14A shown). In addition, the thread tension controller 12 is used to adjust the tightness state of the bottom thread 60 to change the thread tension of the bottom thread 60. Furthermore, the bobbin replacement device 20 is installed on the base 11, and the bobbin replacement device 20 can sequentially move the bobbin set 50 (as Figure 3 shown) from the position of the rotating shuttle to the bottom thread cleaning device 30 and the bottom thread guiding device 40. Additionally, the bottom thread cleaning device 30 can separate the bottom thread 60 from the bobbin set 50.

[0062] Please refer to Figure 3 as shown. In this embodiment, the bobbin set 50 has a function of winding the bottom thread 60 (as Figure 14Aa bobbin 51 (as shown) and a bobbin case 52 that can be assembled to the bobbin 51. The bobbin 51 is provided with a winding shaft member 511 and two side plates 512. Among them, the two side plates 512 are respectively formed at opposite ends of the winding shaft member 511, so that a winding space 513 capable of accommodating the bobbin thread 60 is jointly formed between the two side plates 512. As shown in the figure, the bobbin case 52 has a housing 521, a thread clamping spring piece 522, a latch group 523, and a spiral wire hook 524. The housing 521 presents a hollow state, and a hollow spindle 521a is provided inside the housing 521. Moreover, connection ends 521b and an open end 521c are respectively formed at opposite ends of the housing 521, and a receiving space 521d capable of accommodating the bobbin 51 is formed between the inner edge of the housing 521 and the outer edge of the spindle 521a. Among them, the housing 521 is provided with a communication hole 521e communicating with the receiving space 521d at the connection end 521b. And, a wire guiding hole 521f and slots 521g arranged at intervals with respect to the wire guiding hole 521f are formed through the housing 521 between the connection end 521b and the open end 521c. Both the wire guiding hole 521f and the slots 521g communicate with the receiving space 521d, and a wire guiding groove 521h communicating with the receiving space 521d is recessed from the open end 521c towards the connection end 521b of the housing 521. As shown in the figure, the thread clamping spring piece 522 is connected to the outer side surface of the housing 521 to cover a part of the wire guiding groove 521h, and a pair of guiding ports 522a located with respect to the wire guiding hole 521f are provided at one end of the thread clamping spring piece 522, so that the thread clamping spring piece 522 can guide the bobbin thread 60 from the wire guiding groove 521h to the wire guiding hole 521f. The latch group 523 and the spiral wire hook 524 are both installed at the connection end 521b of the housing 521. Among them, the latch group 523 can be connected to the bobbin thread introducing device 40, and the spiral wire hook 524 has a mounting section 524a, a spiral section 524b, and an extension section 524c. The mounting section 524a is assembled to the connection end 521b through a screw 525, the spiral section 524b is located opposite to the communication hole 521e, and the extension section 524c is formed between the mounting section 524a and the spiral section 524b.

[0063] Please refer to Figure 4 and Figure 5 as shown, the bobbin thread introducing device 40 is assembled to the base 11 of the sewing machine body 10. And, the bobbin thread introducing device 40 mainly consists of a bobbin group movement mechanism 41, a jig moving mechanism 42, a bobbin thread clamping mechanism 43, a bobbin thread detecting mechanism 44, a thread clamping release mechanism 45, and a bobbin thread limiting mechanism 46. Please refer to Figures 5 to 7As shown, the bobbin set movement mechanism 41 has a bobbin set movable component 411, a bobbin rotating component 412, a bobbin case rotating component 413, and a bobbin case moving component 414. As shown in the figure, the bobbin set movable component 411 has a rotatable bobbin turntable 411a and a bobbin case movable rod 411b that can rotate and move. One side of the bobbin turntable 411a is connected to a contact platform 411a1, and a blade 411c made of an elastic material is jointly installed on the bobbin turntable 411a and the contact platform 411a1. In this embodiment, the blade 411c has a blade portion 411c1 that can contact the contact platform 411a1 and a fixing portion 411c2 located at the rear side of the bobbin turntable 411a. Moreover, the blade 411c is provided with a deformable portion 411c3 that can change its shape between the blade portion 411c1 and the fixing portion 411c2, and a clamping space S is provided between the blade portion 411c1 and the contact platform 411a1 (as Figure 17B shown).

[0064] Please refer to Figure 8 As shown, the bobbin 51 of the bobbin set 50 is installed on the bobbin turntable 411a of the bobbin set movable component 411, and a positioning mechanism 47 is provided between the bobbin 51 and the bobbin turntable 411a. Among them, the positioning mechanism 47 is used to prevent the bobbin 51 from separating from the bobbin turntable 411a and to prevent the bobbin 51 from rotating relative to the bobbin turntable 411a during the process of winding the bobbin thread 60 around the bobbin 51. As shown in the figure, the positioning mechanism 47 has a guiding component 471 and a positioning component 472. The guiding component 471 is set as a pair of mutually magnetizable magnets 471a, and the positioning component 472 is set as a convex block 472a and a positioning hole 472b that can be mutually buckled. As shown in the figure, one of the magnets 471a is assembled on the bobbin turntable 411a, and the other magnet 471a is assembled on the side plate 512 of the bobbin 51. In addition, the convex block 472a is formed on the bobbin turntable 411a, and the positioning hole 472b is formed in one of the side plates 512 of the bobbin 51. In this embodiment, the guiding component 471 is set as a pair of magnets 471a only for the convenience of description. That is, the guiding component 471 can be set as a magnet and a magnet guiding block.

[0065] Please refer to again Figures 5 to 7As shown, the bobbin case movable rod 411b of the bobbin case group movable component 411 is movably inserted through the bobbin turntable 411a of the bobbin case group movable component 411, so that the bobbin case movable rod 411b can rotate or move relative to the bobbin turntable 411a. One end of the bobbin case movable rod 411b away from the bobbin turntable 411a penetrates into a rotatable rotating sleeve 411d. A synchronization unit 411e is provided between the rotating sleeve 411d and the bobbin case movable rod 411b to enable the bobbin case movable rod 411b to move back and forth relative to the rotating sleeve 411d. The synchronization unit 411e can also synchronously rotate the rotating sleeve 411d and the bobbin case movable rod 411b.

[0066] As Figure 7 shown, the synchronization unit 411e of the bobbin case group movable component 411 has a synchronization chute 411e1 and a synchronization stud 411e2. The synchronization chute 411e1 is parallel to the Y-axis and is formed on the rotating sleeve 411d of the bobbin case group movable component 411. The synchronization stud 411e2 is connected to the bobbin case movable rod 411b of the bobbin case group movable component 411. The synchronization stud 411e2 is inserted through the synchronization chute 411e1 and contacts the wall surface of the synchronization chute 411e1 in a line contact manner. Thus, when the bobbin case movable rod 411b moves back and forth relative to the rotating sleeve 411d, the synchronization stud 411e2 moves inside the synchronization chute 411e1. However, the fact that the synchronization chute 411e1 is formed on the rotating sleeve 411d and the synchronization stud 411e2 is formed on the bobbin case movable rod 411b is only for convenience of description. That is, the rotating sleeve 411d can protrude to form the synchronization stud 411e2, and the bobbin case movable rod 411b can be recessed to form the synchronization chute 411e1.

[0067] Please refer to Figure 6As shown, the bobbin rotation assembly 412 of the bobbin set movement mechanism 41 has a bobbin rotation source 412a and a rotating bobbin transmission unit 412b. The bobbin rotation source 412a is connected to the base 11 of the sewing machine body 10. Moreover, the bobbin rotation source 412a is located on the right side of the bobbin case movable rod 411b of the bobbin set movable assembly 411. The bobbin rotation source 412a is connected to the bobbin turntable 411a of the bobbin set movable assembly 411 via the rotating bobbin transmission unit 412b, such that the rotating bobbin transmission unit 412b is disposed between the bobbin rotation source 412a and the bobbin turntable 411a. Among them, the rotating bobbin transmission unit 412b has a bobbin driving pulley 412b1 assembled on the bobbin rotation source 412a and a bobbin driven pulley 412b2 assembled on the bobbin turntable 411a. The bobbin driving pulley 412b1 is connected to the bobbin driven pulley 412b2 via a bobbin belt 412b3. In this embodiment, the bobbin rotation source 412a can generate rotational power, so that the bobbin rotation source 412a can drive the bobbin turntable 411a to rotate via the rotating bobbin transmission unit 412b.

[0068] The bobbin case rotation assembly 413 of the bobbin set movement mechanism 41 has a bobbin case rotation source 413a and a rotating bobbin case transmission unit 413b. The bobbin case rotation source 413a is connected to the base 11 of the sewing machine body 10 to be located on the left side of the bobbin case movable rod 411b of the bobbin set movable assembly 411, such that the bobbin case movable rod 411b is located between the bobbin rotation source 412a and the bobbin case rotation source 413a. The rotating bobbin case transmission unit 413b is disposed between the bobbin case rotation source 413a and the rotating sleeve 411d of the bobbin set movable assembly 411. Among them, the rotating bobbin case transmission unit 413b has a bobbin case driving pulley 413b1 assembled on the bobbin case rotation source 413a and a bobbin case driven pulley 413b2 assembled on the rotating sleeve 411d. The bobbin case driving pulley 413b1 and the bobbin case driven pulley 413b2 jointly assemble a bobbin case belt 413b3. In this embodiment, the bobbin case rotation source 413a can generate rotational power, so that the bobbin case rotation source 413a can drive the rotating sleeve 411d to rotate via the rotating bobbin case transmission unit 413b. The rotating sleeve 411d drives the bobbin case movable rod 411b of the bobbin set movable assembly 411 to rotate through the synchronization unit 411e of the bobbin set movable assembly 411.

[0069] The bobbin case moving assembly 414 of the bobbin case group moving mechanism 41 has a bobbin case moving source 414a and a bobbin case transmission member 414b. The bobbin case moving source 414a is located behind the bobbin case moving rod 411b of the bobbin case group movable assembly 411, such that the bobbin case moving source 414a is between the bobbin rotating source 412a and the bobbin case rotating source 413a. The bobbin case transmission member 414b is connected to the bobbin case moving rod 411b, and at the same time, the bobbin case transmission member 414b is pivotally connected to the bobbin case rotating source 413a, such that the bobbin case transmission member 414b can rotate relative to the bobbin case rotating source 413a. In this embodiment, the bobbin case moving source 414a can generate an axial moving force, such that the bobbin case moving source 414a can drive the bobbin case moving rod 411b to perform axial movement via the bobbin case transmission member 414b.

[0070] Please refer to Figure 9 As shown, the clamp moving mechanism 42 of the bobbin thread guiding device 40 is mainly composed of a front - rear moving assembly 421, an up - down moving assembly 422, and a left - right moving assembly 423. Among them, the front - rear moving assembly 421 has a front - rear driving source 421a and a front - rear moving plate 421b. The front - rear driving source 421a is fixed to the base 11 of the sewing machine body 10, and the front - rear moving plate 421b is movably assembled to the base 11, such that the front - rear moving plate 421b can move back and forth relative to the base 11. Among them, a switching unit 421c capable of switching rotational motion to linear motion is provided between the front - rear driving source 421a and the front - rear moving plate 421b. The switching unit 421c is set as a gear 421c1 assembled to the front - rear driving source 421a and a rack 421c2 meshing with the gear 421c1. Then, the rack 421c2 is connected to the front - rear moving plate 421b. In this embodiment, the front - rear driving source 421a can generate rotational power, such that the front - rear driving source 421a can drive the front - rear moving plate 421b to move through the switching unit 421c.

[0071] The up-and-down moving component 422 of the jig moving mechanism 42 has an up-and-down driving source 422a configured as a pneumatic cylinder and an up-and-down moving plate 422b connected to the up-and-down driving source 422a. The up-and-down driving source 422a can drive the up-and-down moving plate 422b to move up and down. Moreover, the up-and-down driving source 422a is connected to the front-and-back moving plate 421b of the front-and-back moving component 421, and the up-and-down moving plate 422b is movably connected to the front-and-back moving plate 421b, enabling the up-and-down moving plate 422b to move up and down relative to the front-and-back moving plate 421b. Additionally, the left-and-right moving component 423 of the jig moving mechanism 42 has a left-and-right driving source 423a configured as a pneumatic cylinder and a left-and-right moving plate 423b movably connected to the up-and-down moving plate 422b. The left-and-right driving source 423a is connected to the up-and-down moving plate 422b, and the left-and-right driving source 423a is connected to the left-and-right moving plate 423b, enabling the left-and-right driving source 423a to drive the left-and-right moving plate 423b to move left and right relative to the up-and-down moving plate 422b.

[0072] As Figure 9As shown, the bobbin clamping mechanism 43 of the bobbin thread feeding device 40 is connected to the left and right moving plate 423b of the left and right moving assembly 423. Moreover, the bobbin clamping mechanism 43 has a clamping fixture assembly 431 and a clamping fixture driving assembly 432. Among them, the clamping fixture assembly 431 has a fixed clamping fixture 431a fixedly connected to the left and right moving plate 423b and a movable clamping fixture 431b pivotally connected to the fixed clamping fixture 431a. A clamping groove 431a1 is provided at the end of the fixed clamping fixture 431a, while a clamping block 431b1 with a volume smaller than that of the clamping groove 431a1 is provided at the end of the movable clamping fixture 431b. Also, the movable clamping fixture 431b can swing relative to the fixed clamping fixture 431a so that the clamping block 431b1 can selectively approach or move away from the clamping groove 431a1. In addition, the clamping fixture driving assembly 432 has a clamping driving source 432a, a fastening driving source 432b, and an opening spring 432c. Both the clamping driving source 432a and the fastening driving source 432b are configured as air cylinders, and both the clamping driving source 432a and the fastening driving source 432b are connected to the left and right moving plate 423b. Among them, the clamping driving source 432a can drive a clamping telescopic rod 432d that selectively contacts or separates from the movable clamping fixture 431b to move. When the clamping telescopic rod 432d touches the movable clamping fixture 431b through the clamping driving source 432a, the clamping driving source 432a can drive the movable clamping fixture 431b to swing. Additionally, the fastening driving source 432b can drive a fastening telescopic rod 432e that selectively contacts or separates from the movable clamping fixture 431b to move. When the fastening telescopic rod 432e touches the movable clamping fixture 431b through the fastening driving source 432b, the fastening driving source 432b can drive the movable clamping fixture 431b to swing. In this embodiment, the amplitude of the swing of the movable clamping fixture 431b driven by the clamping driving source 432a is smaller than the amplitude of the swing of the movable clamping fixture 431b driven by the fastening driving source 432b. Moreover, one end of the opening spring 432c is hooked to the movable clamping fixture 431b, and the other end of the opening spring 432c is hooked to a hooking plate 432f connected to the fastening driving source 432b. When the two ends of the opening spring 432c are respectively hooked to the movable clamping fixture 431b and the hooking plate 432f, the overall length of the opening spring 432c will increase so that the opening spring 432c can pull the movable clamping fixture 431b.

[0073] Please refer to Figure 10AAs shown, when the opening spring 432c of the fixture driving assembly 432 is hooked to both the movable fixture 431b of the fixture assembly 431 and the hooking plate 432f of the fastening driving source 432b at the same time, the opening spring 432c will pull the movable fixture 431b to swing clockwise, so that one end of the movable fixture 431b away from the clamping block 431b1 can contact the left and right moving plate 423b of the left and right moving assembly 423, enabling the fixture assembly 431 to maintain an open state P1. As shown in the figure, when the fixture assembly 431 is in the open state P1, the clamping block 431b1 of the movable fixture 431b is located outside the clamping groove 431a1 of the fixed fixture 431a. Please refer to Figure 10B As shown, the clamping driving source 432a of the fixture driving assembly 432 drives the clamping telescopic rod 432d of the fixture driving assembly 432 to contact the movable fixture 431b, so that the clamping driving source 432a pushes the movable fixture 431b to swing. Furthermore, the movable fixture 431b can move away from the fastening telescopic rod 432e of the fixture driving assembly 432, causing the movable fixture 431b to swing counterclockwise and enabling the fixture assembly 431 to switch from the open state P1 to the clamping state P2. Among them, when the fixture assembly 431 is in the clamping state P2, a part of the clamping block 431b1 is located inside the clamping groove 431a1. Please refer to Figure 10C As shown, the fastening driving source 432b drives the fastening telescopic rod 432e of the fixture driving assembly 432 to contact the movable fixture 431b, so that the fastening driving source 432b pushes the movable fixture 431b to swing. Furthermore, the movable fixture 431b swings counterclockwise, causing the fixture assembly 431 to present a fastening state P3, and the entire clamping block 431b1 is located inside the clamping groove 431a1.

[0074] Please refer to Figure 5 and Figure 11As shown, the bobbin thread detection mechanism 44 of the bobbin thread introduction device 40 has a detection component 441 capable of swinging and a detection drive component 442 connected to the detection component 441. In this embodiment, the detection component 441 has a connecting rod 441a, a contact rod 441b, and a sensor 441c. The connecting rod 441a is pivotally connected to the base 11 of the sewing machine body 10, so that the connecting rod 441a can swing relative to the base 11. The contact rod 441b is provided with a contact rod pivot portion 441b1 pivotally connected to the connecting rod 441a, so that the contact rod 441b can swing relative to the connecting rod 441a. Moreover, the contact rod 441b extends from the contact rod pivot portion 441b1 to form an induction portion 441b2 for cooperating with the sensor 441c and a contact portion 441b3 arranged at intervals with respect to the induction portion 441b2. Among them, a detection spring 441d capable of deforming is provided between the connecting rod 441a and the contact rod 441b. When the detection spring 441d is located between the connecting rod 441a and the contact rod 441b, both the connecting rod 441a and the contact rod 441b jointly press on the detection spring 441d, so that the detection spring 441d can push the contact rod 441b, and then the contact rod 441b can deflect away from the connecting rod 441a through the detection spring 441d. In addition, the sensor 441c is connected to the base 11, and the sensor 441c is used in cooperation with the induction portion 441b2. The detection drive component 442 has a detection drive source 442a connected to the base 11 and a detection telescopic rod 442b connected to the contact rod 441b. Among them, the detection drive source 442a can drive the detection telescopic rod 442b to move, and the moving detection telescopic rod 442b can drive the detection component 441 to swing.

[0075] Please refer to Figure 5 and Figure 12As shown, the thread clamping release mechanism 45 of the bottom thread guiding device 40 has a release lever 451 and a release driving source 452. The release lever 451 has a release lever pivoting portion 451a pivotally connected to the base 11. Moreover, at both ends of the release lever 451 with respect to the release lever pivoting portion 451a, an acting portion 451b connected to the release driving source 452 and a pushing portion 451c away from the acting portion 451b are respectively formed. The pushing portion 451c is located behind the fixing portion 411c2 of the blade 411c. Moreover, the pushing portions 451c are arranged at intervals with respect to the fixing portion 411c2. Among them, the release driving source 452 can generate power to drive the acting portion 451b to move, causing the release lever 451 to swing with the release lever pivoting portion 451a as a fulcrum. Furthermore, the pushing portion 451c can selectively approach or move away from the rear side of the bobbin turntable 411 of the bobbin set moving assembly 411. Furthermore, the pushing portion 451c pushes against the deforming portion 411c3 to cause the deforming portion 411c3 to deform. Furthermore, the cutting edge portion 411c1 of the blade 411c is away from the contact platform 411a1 of the bobbin turntable 411 through the deformed deforming portion 411c3 so that the bottom thread 60 can enter the interior of the clamping space S.

[0076] Please refer to Figure 5 and Figure 13 As shown, the bottom thread limiting mechanism 46 of the bottom thread guiding device 40 is located between the bobbin set moving mechanism 41 and the thread tension controller 12 of the sewing machine body 10. Moreover, the bottom thread limiting mechanism 46 has a limiting frame 461, a limiting spring 462 and a limiting driving source 463. The limiting frame 461 has a pivoting shaft 461a for pivotally connecting to the base 11 of the sewing machine body 10. At both ends of the pivoting shaft 461a, an adjusting plate 461b and a pushing column 461c are respectively provided. Among them, a through hole 461b1 is formed through a partial area of the adjusting plate 461b. Moreover, the pushing column 461c is close to the limiting driving source 463. In addition, both ends of the limiting spring 462 are respectively installed on the pushing column 461c and the base 11 so as to drive the limiting frame 461 to swing counterclockwise around the axis of the pivoting shaft 461a, enabling the pushing column 461c to continuously contact the limiting driving source 463 through the limiting spring 462. The limiting driving source 463 can generate power to push the limiting frame 461 to swing clockwise around the axis of the pivoting shaft 461a.

[0077] Please refer to Figure 14AAs shown, when the automatic bobbin winding machine 1 is specifically applied, a bobbin set 50 wound with a bobbin thread 60 is assembled on the rotary hook of the sewing machine body 10. The bobbin thread 60 from a bobbin thread supply source (not shown in the figure) is first passed through the thread tension controller 12, and then the bobbin thread 60 from the bobbin thread supply source is passed through the through hole 461b1 of the bobbin thread limiting mechanism 46, so that the head end of the bobbin thread 60 from the bobbin thread supply source can be located inside the clamping space S of the thread clamping release mechanism 45. At this time, the pushing portion 451c of the release lever 451 is separated from the blade 411c, and the blade 411c makes the cutting edge portion 411c1 of the blade 411c approach the contact platform 411a1 of the bobbin turntable 411a by its own elastic force. Furthermore, the cutting edge portion 411c1 of the blade 411c and the contact platform 411a1 of the bobbin turntable 411a jointly clamp the bobbin thread 60. After the cutting edge portion 411c1 and the contact platform 411a1 jointly clamp the bobbin thread 60, the thread tension controller 12 is used to adjust the thread tension of the bobbin thread 60, so that the bobbin thread 60 is in a tightened state.

[0078] Please refer to Figure 14B As shown, when the sewing machine body 10 performs sewing operations and the stock of the bobbin thread 60 in the bobbin set 50 is nearly used up, the automatic bobbin winding machine 1 starts the operation of replacing the bobbin set 50. First, the bobbin replacing device 20 moves the bobbin set 50 with nearly used-up bobbin thread 60 from the rotary hook of the sewing machine body 10 to the bobbin thread cleaning device 30, and then moves another bobbin set 50 wound with a full bobbin thread 60 from the bobbin turntable 411a to the rotary hook. Thus, the operation of replacing the bobbin set 50 is completed. Next, the bobbin thread cleaning device 30 is used to pull out the remaining bobbin thread 60 located inside the winding space 513 to the outside of the bobbin case 52.

[0079] Please refer to Figure 15AAs shown, after the bobbin set 50 is emptied of the bobbin thread 60 by the bobbin thread clearing device 30, the bobbin replacement device 20 moves the bobbin set 50 without the bobbin thread 60 from the bobbin thread clearing device 30 to the bobbin set moving mechanism 41 of the bobbin thread guiding device 40. Then, the automatic bobbin winder 1 starts the operation of winding the bobbin thread 60. As shown, when the bobbin set 50 is installed on the bobbin set moving mechanism 41 of the bobbin thread guiding device 40, the latch set 523 of the bobbin case 52 latches the bobbin case moving rod 411b of the bobbin set moving component 411 to restrict the bobbin case 52 of the bobbin set 50 from axially moving along the bobbin case moving rod 411b. At the same time, the winding shaft member 511 of the bobbin 51 is sleeved on the bobbin case moving rod 411b, so that the bobbin 51 is close to the bobbin turntable 411a of the bobbin set moving component 411. At this time, the convex block 472a of the positioning component 472 may not penetrate into the positioning hole 472b of the positioning component 472, so that the two magnets 471a of the guiding component 471 are arranged staggeredly and cannot generate an effective magnetic suction force. Furthermore, the bobbin 51 may be able to rotate relative to the bobbin turntable 411a and present a free state of free rotation.

[0080] Please refer to Figure 15B As shown, after the latch set 523 of the bobbin case 52 latches the bobbin case moving rod 411b of the bobbin set moving component 411, the detection driving source 442a of the detection driving component 442 drives the detection telescopic rod 442b of the detection driving component 442 to extend outwards, so that the detection component 441 of the bobbin thread detection mechanism 44 swings towards the direction close to the bobbin set 50, and the contact part 441b3 of the contact rod 441b enters into the slot 521g of the bobbin case 52, and the contact part 441b3 contacts the wall surface of the slot 521g, so that a part of the contact part 441b3 is located between the two side plates 512 of the bobbin 51. Furthermore, the contact part 441b3 can prevent the bobbin 51 from moving along the bobbin case moving rod 411b next and separating from the bobbin turntable 411a of the bobbin set moving component 411. And, the contact rod 441b stops swinging because the contact part 441b3 touches the wall surface of the slot 521g. At this time, because the contact rod 441b does not swing to the limit position, the connecting rod 441a of the detection component 441 swings relative to the contact rod 441b through the detection driving source 442a. Furthermore, the overall length of the detection spring 441d is shortened by being jointly squeezed by the connecting rod 441a and the contact rod 441b.

[0081] Please refer to Figure 15CAs shown, when the detection telescopic rod 442b of the detection drive assembly 442 stays at the limit position, the bobbin case moving source 414a of the bobbin case moving assembly 414 drives the bobbin case moving rod 411b of the bobbin case moving assembly 411 to move forward through the bobbin case transmission member 414b of the bobbin case moving assembly 414, so that the synchronous convex column 411e2 of the synchronization unit 411e moves along the synchronous chute 411e1. Furthermore, the bobbin case moving rod 411b moves relative to the bobbin turntable 411a and the rotating sleeve 411d of the bobbin case moving assembly 411. Since the contact portion 441b3 of the contact rod 441b is located between the two side plates 512 of the bobbin 51, the axial movement of the bobbin 51 is restricted. Therefore, the forward-moving bobbin case moving rod 411b can only drive the bobbin case 52 of the bobbin set 50 to move forward, resulting in the separation of the bobbin case 52 from the bobbin 51, and the bobbin 51 is located outside the accommodation space 521d of the bobbin case 52. Among them, during the forward movement of the bobbin case 52, the slot 521g of the bobbin case 52 separates from the contact portion 441b3 of the contact rod 441b, so that the contact portion 441b3 does not contact the wall surface of the slot 521g. At this time, under the elastic action of the detection spring 441d of the detection assembly 441, the contact rod 441b is pushed, so that the contact rod 441b swings counterclockwise relative to the connecting rod 441a of the detection assembly 441, and the contact portion 441b3 extends into the winding space 513 of the bobbin 51 again. Furthermore, the contact portion 441b3 is closer to the winding shaft member 511 of the bobbin 51.

[0082] Please refer to Figure 15D As shown, after the bobbin 51 of the bobbin set 50 is located outside the accommodation space 521d of the bobbin case 52, the bobbin rotation source 412a of the bobbin rotation assembly 412 generates rotational power to drive the bobbin driving pulley 412b1 of the rotating bobbin transmission unit 412b to rotate, so that the bobbin belt 412b3 of the rotating bobbin transmission unit 412b drives the bobbin turntable 411a of the bobbin case moving assembly 411 to rotate around the bobbin case moving rod 411b through the bobbin driven pulley 412b2 of the rotating bobbin transmission unit 412b. Furthermore, the bottom thread 60 located in the clamping space S starts to rotate with the bobbin turntable 411a. Among them, during the initial rotation of the bobbin turntable 411a driven by the bobbin rotation source 412a, the bobbin turntable 411a can rotate relative to the bobbin 51 to prompt the two magnets 471a of the guiding assembly 471 to be aligned with each other, so that a magnetic attraction force is generated between the two magnets 471a. Furthermore, the convex block 472a of the positioning assembly 472 penetrates into the positioning hole 472b of the positioning assembly 472 through the magnetic attraction force between the two magnets 471a, which can relatively prevent the bobbin 51 from rotating relative to the bobbin turntable 411a. As a result, the bobbin 51 of the bobbin set 50 can rotate synchronously with the bobbin turntable 411a to bring the bottom thread 60 into the winding space 513 of the bobbin 51.

[0083] Please refer to Figure 15E As shown in Figure 15F When the bottom thread 60 is wound around the winding shaft member 511 of the bobbin 51 and reaches a certain number of turns (for example, 10 turns or 20 turns), the release driving source 452 of the thread clamping release mechanism 45 drives the release lever 451 of the thread clamping release mechanism 45 to swing, so that the pushing portion 451c of the release lever 451 pushes against the deformed portion 411c3 of the blade 411c to cause the deformed portion 411c3 to deform. The cutting edge portion 411c1 of the blade 411c is separated from the contact platform 411a1 of the bobbin turntable 411a through the deformed portion 411c3 that has been deformed, so that the bottom thread 60 located in the clamping space S can be disengaged from between the cutting edge portion 411c1 and the contact platform 411a1. Then, the bottom thread 60 located in the clamping space S is wound into the winding space 513 of the bobbin 51 by the rotating bobbin turntable 411a. Immediately afterwards, the release driving source 452 drives the pushing portion 451c away from the bobbin turntable 411a. Then, the blade 411c returns the cutting edge portion 411c1 of the blade 411c to contact the contact platform 411a1 of the bobbin turntable 411a again by its own elastic force.

[0084] Please refer to Figure 15G As shown in Figure 15H When the winding amount of the bottom thread 60 wound around the bobbin 51 is close to being full, the bottom thread 60 touches the contact portion 441b3 of the contact rod 441b. And the bottom thread 60 pushes the contact rod 441b to swing clockwise relative to the connecting rod 441a of the detection assembly 441, so that the contact rod 441b and the connecting rod 441a jointly squeeze the detection spring 441d of the detection assembly 441, and at the same time make the sensing portion 441b2 of the contact rod 441b gradually approach the sensor 441c of the detection assembly 441. When the sensing portion 441b2 of the contact rod 441b enters the sensing range of the sensor 441c, the winding space 513 inside the bobbin 51 is already full of the bottom thread 60, and the sensor 441c will generate a signal to stop the rotation of the bobbin rotation source 412a of the bobbin rotation assembly 412. Thus, the operation of winding the bottom thread 60 is completed. Please refer to

[0085] Please refer to Figure 16AAs shown, after the bobbin 51 of the bobbin set 50 finishes winding the bobbin thread 60, since the front and rear positions of the bobbin thread 60 inside the winding space 513 cannot be confirmed, the limit driving source 463 of the bobbin thread limit mechanism 46 needs to push the limit frame 461 of the bobbin thread limit mechanism 46 to swing around the pivot shaft 461a, so that the adjustment plate 461b of the limit frame 461 pushes against the bobbin thread 60 located between the thread tension controller 12 and the bobbin 51, and then the bobbin thread 60 is located at the corner of the through hole 461b1 of the adjustment plate 461b. Thus, next, the clamp assembly 431 can ensure clamping the bobbin thread 60 located between the thread tension controller 12 and the bobbin 51. To achieve the foregoing effect, another implementation procedure is that before the bobbin 51 stops winding the bobbin thread 60, the limit driving source 463 pushes the limit frame 461 to swing, so that the adjustment plate 461b abuts against the bobbin thread 60 located between the thread tension controller 12 and the bobbin 51, and then restricts the bobbin thread 60 from approaching the clamp assembly 431, so that the finally located bobbin thread 60 between the thread tension controller 12 and the bobbin 51 can be set on the movement path of the clamp assembly 431.

[0086] In addition, in order to prevent the clamp assembly 431 of the bobbin thread clamping mechanism 43 from moving forward, backward, left, right, up, and down through the clamp driving assembly 432 of the bobbin thread clamping mechanism 43, since the contact platform 411a1 between the blade 411c of the bobbin set movable assembly 411 and the bobbin turntable 411a will interfere with the movement range of the clamp assembly 431, the bobbin rotation source 412a of the bobbin rotation assembly 412 drives the bobbin turntable 411a and the blade 411c to rotate, so that the blade 411c and the contact platform 411a1 rotate to an angle that can avoid the clamp assembly 431 to be away from the movement range of the clamp assembly 431.

[0087] Please refer to Figure 16BAs shown, the left and right drive source 423a of the left and right moving component 423 drives the left and right moving plate 423b of the left and right moving plate 423b to move rightward, and the clamp component 431 of the bottom thread clamping mechanism 43 approaches the bottom thread 60 located between the bobbin 51 and the thread tension controller 12 through the rightward moving left and right moving plate 423b, so that the bottom thread 60 between the bobbin 51 and the thread tension controller 12 is located between the fixed clamp 431a and the movable clamp 431b. Next, the clamping drive source 432a of the clamp drive component 432 drives the clamping telescopic rod 432d of the clamp drive component to push the movable clamp 431b of the clamp component 431, so that the clamp component 431 switches from the open state P1 to the clamping state P2. Furthermore, both the fixed clamp 431a and the movable clamp 431b jointly clamp the bottom thread 60 between the bobbin 51 and the thread tension controller 12. In this embodiment, when the clamp component 431 presents the clamping state P2 to clamp the bottom thread 60, the bottom thread 60 can slide relative to the clamp component 431 to prevent the clamp component 431 from pulling the bottom thread 60 wound on the bobbin 51 out of the bobbin case 52.

[0088] Please refer to Figure 16C As shown, the left and right drive source 423a of the left and right moving component 423 drives the left and right moving plate 423b of the left and right moving plate 423b to move leftward, so that the clamp component 431 of the bottom thread clamping mechanism 43 moves away from the bobbin set 50 through the leftward moving left and right moving plate 423b. Furthermore, the clamp component 431 pulls the bottom thread 60 between the bobbin 51 and the thread tension controller 12 to the left side of the bobbin set 50. Next, the bobbin case moving source 414a of the bobbin case moving component 414 drives the bobbin case moving rod 411b of the bobbin case moving component 411 to move backward through the bobbin case transmission member 414b of the bobbin case moving component 414. Furthermore, the backward moving bobbin case moving rod 411b drives the bobbin case 52 of the bobbin set 50 to approach the bobbin 51 of the bobbin set 50, so that the bobbin 51 is located inside the accommodation space 521d of the bobbin case 52. Among them, during the backward movement of the bobbin case 52, the open end 521c of the bobbin case 52 will contact the bottom thread 60 between the clamp component 431 and the bobbin 51, so that the bottom thread 60 between the clamp component 431 and the bobbin 51 is in a tensioned state.

[0089] Please refer to Figure 16DAs shown, when the bobbin thread 60 located between the jig assembly 431 and the bobbin 51 contacts the open end 521c of the bobbin case 52, the bobbin case rotation source 413a of the bobbin case rotation assembly 413 generates a rotational power to drive the bobbin case drive pulley 413b1 of the rotating bobbin case drive unit 413b to rotate, so that the bobbin case belt 413b3 of the rotating bobbin case drive unit 413b drives the rotating sleeve 411d of the bobbin group movable assembly 411 to rotate about the bobbin case movable rod 411b. When the rotating sleeve 411d rotates, the synchronous projection 411e2 of the synchronous unit 411e is restricted by the synchronous chute 411e1 and rotates synchronously, so that the rotating sleeve 411d can drive the bobbin case movable rod 411b to rotate through the synchronous unit 411e, and then the bobbin case 52 of the bobbin group 50 rotates synchronously. As shown, the bobbin case rotation source 413a first drives the bobbin case 52 of the bobbin group 50 to rotate clockwise through the rotating bobbin case drive unit 413b, and then the bobbin case rotation source 413a drives the bobbin case 52 of the bobbin group 50 to rotate counterclockwise, so that the rotating bobbin case 52 can guide the bobbin thread 60 into the wire groove 521h of the bobbin case 52, and the bobbin thread 60 touches the thread clamping spring piece 522 of the bobbin case 52. In this embodiment, during the process of guiding the bobbin thread 60 into the wire groove 521h, the jig assembly 431 still presents the clamping state P2, so that the bobbin thread 60 can still slide relative to the jig assembly 431 even though it is clamped by the jig assembly 431, thereby preventing the jig assembly 431 from pulling out the bobbin thread 60 wound around the bobbin 51 to the outside of the bobbin case 52.

[0090] Please refer to Figure 16EAs shown, after the bottom thread 60 touches the thread clamping piece 522 of the bobbin case 52, the fastening drive source 432b of the clamp drive assembly 432 drives the fastening telescopic rod 432e of the clamp drive assembly 432 to move outward, so that the moving fastening telescopic rod 432e pushes the movable clamp 431b to swing, causing the clamp assembly 431 to switch from the clamping state P2 to the fastening state P3, and clamping the fixed clamp 431a and the movable clamp 431b to the bottom thread 60 located between the bobbin 51 and the thread tension controller 12. In this embodiment, when the clamp assembly 431 is in the fastening state P3 to clamp the clamp assembly 431 to the bottom thread 60, the bottom thread 60 cannot slide relative to the clamp assembly 431. Next, the forward and backward drive source 421a of the forward and backward moving assembly 421 generates rotational power and can drive the forward and backward moving plate 421b of the forward and backward moving assembly 421 to move forward through the switching unit 421c, so that the forward and backward moving plate 421b that moves forward simultaneously drives the up and down moving assembly 422 of the clamp moving mechanism 42 and the left and right moving assembly 423 of the clamp moving mechanism 42 to move forward. Furthermore, the clamp assembly 431 of the bottom thread clamping mechanism 43 pulls the bottom thread 60 into the space between the housing 521 of the bobbin case 52 and the thread clamping piece 522 of the bobbin set 50, allowing the bottom thread 60 to pass through the guiding port 522a of the thread clamping piece 522.

[0091] Please refer to Figure 16F As shown, after the bottom thread 60 passes through the guiding port 522a of the thread clamping piece 522, the fastening drive source 432b of the clamp drive assembly 432 drives the fastening telescopic rod 432e of the clamp drive assembly 432 to contract inward, so that the fastening telescopic rod 432e separates from the movable clamp 431b of the clamp assembly 431. At this time, the opening spring 432c of the clamp drive assembly 432 pulls the movable clamp 431b to swing, enabling the movable clamp 431b to contact the clamping telescopic rod 432d of the clamp drive assembly 432. Furthermore, the clamp assembly 431 switches from the fastening state P3 to the clamping state P2. Next, the forward and backward drive source 421a of the forward and backward moving assembly 421 generates rotational power and can drive the forward and backward moving plate 421b of the forward and backward moving assembly 421 to move backward through the switching unit 421c, moving the bottom thread 60 located between the bobbin 51 and the clamp assembly 431 to the left side of the bobbin case 52. Subsequently, the bobbin case rotation source 413a of the bobbin case rotation assembly 413 generates rotational power and can drive the bobbin case 52 of the bobbin set 50 to rotate counterclockwise through the rotating bobbin case transmission unit 413b, causing the bottom thread 60 to move into the space between the housing 521 of the bobbin case 52 and the extension section 524c of the spiral wire hook 524, and allowing the bottom thread 60 to pass through the communication hole 521e of the bobbin case 52.

[0092] Please refer to Figure 16GAs shown, after the bottom thread 60 is moved between the housing 521 of the bobbin case 52 and the extension section 524c of the spiral wire hook 524, the forward and backward drive source 421a of the forward and backward movement assembly 421 first drives the clamp assembly 431 of the bottom thread clamping mechanism 43 to move forward, and then the bobbin case rotation source 413a of the bobbin case rotation assembly 413 drives the movable rod 411b of the bobbin case rotation assembly 413 to rotate clockwise via the rotating sleeve 411d and the synchronization unit 411e, causing the bobbin case 52 of the bobbin set 50 to rotate clockwise. Next, please refer to Figure 16H and Figure 16I As shown, the forward and backward drive source 421a first drives the clamp assembly 431 of the bottom thread clamping mechanism 43 to move backward, causing the bottom thread 60 between the bobbin 51 and the clamp assembly 431 to move to the rear side of the spiral wire hook 524, and then the bobbin case rotation source 413a drives the movable rod 411b of the bobbin case rotation assembly 413 to rotate counterclockwise, causing the bobbin case 52 of the bobbin set 50 to rotate counterclockwise, so that the bottom thread 60 between the bobbin 51 and the clamp assembly 431 can enter the spiral section 524b of the spiral wire hook 524 from the extension section 524c of the spiral wire hook 524. Subsequently, the forward movement of the clamp assembly 431, the clockwise rotation of the bobbin case 52, the backward movement of the clamp assembly 431, and the counterclockwise rotation of the bobbin case 52 are repeated, so that the bottom thread 60 between the bobbin 51 and the clamp assembly 431 can be moved into the interior of the spiral section 524b. Thus, the operation of installing the bottom thread 60 on the bobbin case 52 is completed. In this embodiment, during the process of the clamp assembly 431 moving the bottom thread 60 into the interior of the spiral section 524b, the clamp assembly 431 remains in the clamping state P2, allowing the bottom thread 60 to slide relative to the clamp assembly 431.

[0093] Please refer to Figure 17A As shown, when the bottom thread 60 is installed in the wire groove 521h of the bobbin case 52 and moved into the interior of the spiral section 524b, the forward and backward drive source 421a of the forward and backward movement assembly 421 generates rotational power and can drive the forward and backward movement plate 421b of the forward and backward movement assembly 421 to move backward via the switching unit 421c. Next, the up and down drive source 422a of the up and down movement assembly 422 drives the up and down movement plate 422b of the up and down movement assembly 422 to move upward, causing the left and right movement assembly 423 of the clamp movement mechanism 42 to drive the clamp assembly 431 of the bottom thread clamping mechanism 43 to move upward through the upwardly moving up and down movement plate 422b, so that the bottom thread 60 between the bobbin 51 and the clamp assembly 431 is located above the bobbin case 52. In this embodiment, during the process of the clamp assembly 431 driving the bottom thread 60 to move upward, the clamp assembly 431 remains in the clamping state P2, and the bottom thread 60 can slide relative to the clamp assembly 431.

[0094] Please refer to Figure 17BAs shown, the release drive source 452 of the thread clamping release mechanism 45 drives the release rod 451 of the thread clamping release mechanism 45 to swing, so that the pushing portion 451c of the release rod 451 abuts against the deformation portion 411c3 of the blade 411c, causing the deformation portion 411c3 to deform, and the cutting edge portion 411c1 of the blade 411c moves away from the contact platform 411a1 of the bobbin turntable 411a. Next, the bobbin rotation source 412a of the bobbin rotation assembly 412 drives the bobbin turntable 411a of the bobbin group movable assembly 411 to rotate clockwise, so that the cutting edge portion 411c1 of the blade 411c approaches the contact platform 411a1 of the bobbin turntable 411a and the bottom thread 60 located between the fixture assembly 431 and the bobbin group 50. Furthermore, the bottom thread 60 is located between the cutting edge portion 411c1 of the blade 411c and the contact platform 411a1 of the bobbin turntable 411a.

[0095] Please refer to Figure 17C As shown, the release drive source 452 of the thread clamping release mechanism 45 drives the pushing portion 451c away from the bobbin turntable 411a. Furthermore, the blade 411c makes the cutting edge portion 411c1 of the blade 411c contact the connection plate contact platform 411a1 by its own elastic force, and the cutting edge portion 411c1 and the contact platform 411a1 jointly clamp the bottom thread 60 located between the fixture assembly 431 and the bobbin group 50. Next, the front-back drive source 421a of the front-back moving assembly 421 generates rotational power and can drive the front-back moving plate 421b of the front-back moving assembly 421 to move forward via the switching unit 421c, so that the forward-moving front-back moving plate 421b simultaneously drives the up-down moving assembly 422 and the left-right moving assembly 423 of the fixture moving mechanism 42 to move forward. Furthermore, the fixture assembly 431 of the bottom thread clamping mechanism 43 touches the bottom thread 60 against the cutting edge portion 411c1 of the blade 411c. In this embodiment, during the process that the fixture assembly 431 drives the bottom thread 60 to contact the blade 411c, the fixture assembly 431 remains in the clamping state P2, so that the bottom thread 60 can slide relative to the fixture assembly 431.

[0096] Please refer to Figure 17DAs shown, the fastening drive source 432b of the clamp drive assembly 432 drives the fastening telescopic rod 432e of the clamp drive assembly 432 to move outward, so that the moving fastening telescopic rod 432e pushes the movable clamp 431b of the clamp assembly 431, causing the movable clamp 431b to separate from the clamping telescopic rod 432d of the clamp drive assembly 432. Then, the clamp assembly 431 switches from the clamping state P2 to the fastening state P3, enabling the fixed clamp 431a and the movable clamp 431b to clamp the bobbin thread 60 between the bobbin 51 and the thread tension controller 12 more tightly. Next, the up-and-down drive source 422a of the up-and-down moving assembly 422 drives the up-and-down moving plate 422b of the up-and-down moving assembly 422 to move downward, causing the clamp assembly 431 of the bobbin thread clamping mechanism 43 to move downward, so that the bobbin thread 60 between the bobbin 51 and the clamp assembly 431 is cut by the cutting edge portion 411c1 of the blade 411c. Please refer to Figure 17E As shown, finally, the clamp assembly 431 returns to the open state P1, and the clamp assembly 431 moves away from the bobbin set 50 through the clamp moving mechanism 42. Thus, the introduction of the bobbin thread 60 into the bobbin set 50 is completed.

[0097] The above description is illustrative of the present invention and not restrictive. Those of ordinary skill in the art understand that many modifications, variations, or equivalents can be made without departing from the spirit and scope defined by the claims, and all of them will fall within the protection scope of the present invention.

Claims

1. A bobbin thread feeding device capable of automatically winding the bobbin thread, for installing a bobbin thread on a bobbin and a bobbin case, characterized in that, Comprising: A bottom thread clamping mechanism having a fixture assembly and a fixture driving assembly. The fixture assembly is provided with a fixed fixture and a movable fixture, and the fixture driving assembly is used to drive the movable fixture to approach the fixed fixture, so that the fixture assembly can switch between an open state where the movable fixture is away from the fixed fixture, a clamping state where the bottom thread can slide relative to the fixture assembly, and a fastening state where the bottom thread cannot slide relative to the fixture assembly; A fixture moving mechanism having a left - right moving assembly, a front - rear moving assembly, and an up - down moving assembly. The left - right moving assembly can drive the bottom thread clamping mechanism to move left and right, the front - rear moving assembly can drive the bottom thread clamping mechanism to move back and forth, and the up - down moving assembly can drive the bottom thread clamping mechanism to move up and down; and A bobbin set movement mechanism having a bobbin rotation source, a bobbin case rotation source, and a bobbin case movement source. The bobbin rotation source drives the bobbin to rotate so that the bottom thread is wound around the bobbin, the bobbin case rotation source drives the bobbin case to rotate so that the bottom thread is installed in the bobbin case, and the bobbin case movement source drives the bobbin case to selectively move away from or close to the bobbin.

2. The bottom thread guiding device capable of automatically winding the bottom thread according to claim 1, characterized in that, The bobbin set movement mechanism further has a bobbin turntable assembled on the bobbin and a bobbin case movable rod assembled on the bobbin case. A blade is installed on the bobbin turntable, and the fixture assembly can bring the bottom thread into contact with the blade through the front - rear moving assembly and the up - down moving assembly.

3. The bottom thread guiding device capable of automatically winding the bottom thread according to claim 2, characterized in that, The bottom thread guiding device further has a bottom thread detecting mechanism. The bottom thread detecting mechanism has a detecting assembly and a detecting driving assembly. The detecting assembly can be inserted into a slot formed in the bobbin case through the detecting driving assembly, so that the bobbin can be prevented from detaching from the bobbin turntable.

4. The bottom thread introducing device capable of automatically winding the bottom thread according to claim 3, characterized in that, The detecting assembly has a contact rod that can be inserted into the slot and a connecting rod connected to the detecting driving assembly. The contact rod is pivotally connected to the connecting rod, so that the contact rod can selectively approach or move away from the connecting rod. A detecting spring that can push the contact rod is provided between the connecting rod and the contact rod, so that the contact rod can be biased away from the connecting rod through the detecting spring.

5. The bottom thread guiding device capable of automatically winding the bottom thread according to claim 1, characterized in that, The fixture driving assembly has a clamping driving source, a fastening driving source, and an opening spring. The clamping driving source is used to push the movable fixture to move so that the fixture assembly presents the clamping state, the fastening driving source is used to push the movable fixture to move so that the fixture assembly presents the fastening state, and the opening spring is used to pull the movable fixture, so that the fixture assembly can be maintained in the open state.

6. The bottom thread guiding device capable of automatically winding the bottom thread according to claim 1, characterized in that, One of the fixed clamp and the movable clamp has a clamping groove, and the other has a clamping block. When the fixture assembly is in the open state, the clamping block is located outside the clamping groove. When the fixture assembly is in the clamping state, a part of the clamping block is located inside the clamping groove. And when the fixture assembly is in the fastening state, the entire clamping block is located inside the clamping groove.

7. The bottom thread guiding device capable of automatically winding the bottom thread according to claim 1, characterized in that, Both the left-right moving assembly and the up-down moving assembly are connected to the front-back moving assembly. When the front-back moving assembly drives the bottom thread clamping mechanism to move back and forth, the left-right moving assembly and the up-down moving assembly move back and forth synchronously with the bottom thread clamping mechanism through the front-back moving assembly.

8. The bottom thread guiding device capable of automatically winding the bottom thread according to claim 1, wherein, The bobbin case has a spiral wire hook that can be restricted to the bottom thread position. The spiral wire hook has a mounting section, a spiral section, and an extension section located between the mounting section and the spiral section. And the bottom thread clamping mechanism can introduce the bottom thread from the extension section into the inside of the spiral section through the front-back moving assembly and the bobbin case rotation source.

9. An automatic bobbin winding machine with a bottom thread guiding device capable of automatically winding the bottom thread as described in any one of claims 1 to 8, characterized in that, Comprising: A bottom thread cleaning device for separating the bottom thread from the bobbin; and A bobbin replacement device capable of moving the bobbin from the bottom thread cleaning device to the bottom thread introduction device.

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