Sewing machine thread guide mechanism

Abstract

A thread guiding mechanism of a sewing machine belongs to the technical field of thread guiding of sewing machines and comprises a seat body, a rotating shaft is rotatably arranged in the middle of the seat body in the vertical direction, the top end of the rotating shaft penetrates through the seat body upwards and is connected with a plurality of placing assemblies, and the rotating shaft rotates and is locked intermittently in the circumferential direction through a driving mechanism. According to the utility model, various coil specifications or types can be adapted for standby application at the same time, and the required vertical rods can be quickly switched to be placed at the use positions, so that the device can effectively play a role in the batch costume production process of frequently changing coils, the requirement of flexible switching of the coils can be fully met, and the production efficiency is improved. When the rotating seat finishes one rotation period, the mounting plate and the vertical rod which are positioned at the top end can be accurately changed into one group, the cooperative rotation of the group of parts, namely the mounting plate and the vertical rod, can be stably realized, and in addition, a guide plate and a guide hole are also arranged, so that a lead can be effectively and accurately guided to a specific processing position of the sewing machine.

Description

Technical Field

[0001] The utility model belongs to the technical field of sewing machine thread guides, and particularly relates to a sewing machine thread guide mechanism. Background Art

[0002] The thread guide device of the sewing machine mainly plays the role of guiding the thread to shuttle smoothly in the sewing machine, thereby achieving normal sewing. The thread guide in the thread guide device can regulate the direction of the upper thread to avoid its entanglement and confusion.

[0003] Related art (Announcement No. CN214032941U) discloses a thread guide device for a sewing machine, including support shafts fixedly provided at the middle positions of both ends of the top of a support platform, support plates inserted at one end of the outer walls of the two support shafts, first rotating shafts rotatably provided at both ends of the top of the support plates, through holes provided on one side of the outer walls of the two first rotating shafts, springs inserted on the inner walls of the two through holes, and the two ends of the two springs fixedly connected to the two sides of the inner walls of the support plates, pads fixed on the tops of the two first rotating shafts, and arc-shaped grooves provided on one side of the outer walls of the two pads. The utility model provides a thread guide device for a sewing machine with a reel device that can automatically collect thread ends. After the sewing device is used, the staff does not need to manually collect the thread ends. The device can automatically collect the thread ends, saving the staff's operating time, thereby improving the practicality of the device.

[0004] Existing sewing machine coils are diverse, and are divided into different coils of different thicknesses, colors, etc. according to their functions. In the context of batch clothing processing, due to the richness of processing styles and the complexity of design requirements, it is often necessary to frequently alternate between these different types of coils; however, the existing single lead mechanism can only adapt to specific coil specifications or types, and it is difficult to effectively play a role in the diverse production process that requires frequent coil changes. It cannot fully meet the functional requirements of flexible coil switching, affecting production efficiency. Utility Model Content

[0005] In view of the existing single thread guide mechanism in the prior art, which can only adapt to specific coil specifications or types, it is difficult to play an effective role in the production process of diversity and frequent coil changes, and cannot fully meet the functional requirements of flexible coil switching, which affects production efficiency. The present invention provides a sewing machine thread guide mechanism that can adapt to a variety of coil specifications or types for simultaneous standby, and quickly convert the required vertical rods to the use position. It can play an effective role in the batch clothing production process with frequent coil changes, and can fully meet the needs of flexible coil switching. Compared with the method of frequently changing individual coils, it can improve production efficiency. Its specific technical solutions are as follows:

[0006] A sewing machine thread guide mechanism, comprising a seat body, a rotating shaft is arranged in the middle of the seat body and rotates in the vertical direction, the top end of the rotating shaft penetrates the seat body upwards and is connected with multiple groups of placing assemblies, the rotating shaft is intermittently rotated and locked in the circumferential direction by a driving mechanism;

[0007] The driving mechanism comprises a rotating seat fixedly installed on the rotating shaft, multiple slide grooves and recesses are equidistantly arranged on the upper surface edge of the rotating seat in the circumferential direction, the number of the slide grooves and the recesses is the same, each slide groove and each recess are arranged adjacently, a rotating rod is arranged in the seat body in the horizontal direction, a rotating disc is fixedly installed on the rotating rod, a limiting block is installed on the side of the rotating disc close to the rotating seat, a poking pin is installed on the side wall of the rotating disc, the poking pin is arranged obliquely relative to the rotating disc, and the poking pin is rotatably embedded in the inner cavity of one of the slide grooves, and the outer side wall of the limiting block is rotatably attached to one of the recesses.

[0008] In the above technical solution, each group of the placing assemblies comprises an installation plate respectively installed on the side wall of the top end of the rotating shaft, multiple vertical rods are vertically installed on the upper surface of the installation plate, and the vertical rods are equidistantly and spacedly arranged.

[0009] In the above technical solution, the shape of the outer side wall of the limiting block is matched with the shape of the recess.

[0010] In the above technical solution, the driving mechanism further comprises a worm gear fixedly installed on the rotating rod, and a worm is rotatably arranged in the seat body, the worm is meshingly connected with the side wall of the bottom end of the worm gear.

[0011] In the above technical solution, the end of the worm extends out of the outer wall of the seat body and is installed with a hand wheel.

[0012] In the above technical solution, a guide mechanism is arranged on the side wall of the seat body.

[0013] The guide mechanism comprises a support arm fixedly installed on the side wall of the seat body, and multiple groups of guide assemblies are arranged on the support arm.

[0014] In the above technical solution, each group of the guide assemblies comprises a guide seat fixedly and vertically installed on the upper surface of the support arm, a guide plate is slidably arranged in the guide seat in the vertical direction, and multiple guide holes are equidistantly arranged on the guide plate from top to bottom.

[0015] In the above technical solution, a positioning assembly is arranged at the guide plate and the guide seat.

[0016] The positioning assembly comprises two positioning pieces fixedly installed on the top end of the guide seat, a positioning bolt is threadedly embedded between the two positioning pieces, and the positioning bolt penetrates the inner cavity of one of the guide holes.

[0017] The sewing machine lead guiding mechanism has the beneficial effects that, compared with the prior art,

[0018] I. For the existing single lead mechanism, only specific coil specifications or types can be adapted, it is difficult to effectively play a role in the production process of diversification and frequent coil change, and it cannot fully meet the functional requirements of flexible coil switching, which affects the production efficiency. The utility model discloses a plurality of installation plates and vertical rods, which can realize the simultaneous standby of diversified vertical rods, can drive the intermittent rotation of the installation plate and the vertical rod and the locking after rotation, facilitate the position change of different types of vertical rods, and flexibly select the appropriate vertical rod for use. The utility model can adapt to a variety of coil specifications or types for simultaneous standby, and quickly convert the required vertical rod to the use position, which can effectively play a role in the batch clothing production process of frequent coil change, and can fully meet the demand of flexible coil switching. Compared with the frequent single coil replacement mode, it can improve the production efficiency;

[0019] II. The utility model discloses a turntable, a poking pin, a limiting block, a rotating seat, a sliding slot and a recess are arranged, which can promote the intermittent rotation of the rotating seat and the locking after rotation, realize the intermittent rotation and change of the shaft, the installation plate and the vertical rod, that is, when the rotating seat completes a rotation period, the installation plate and the vertical rod at the top will accurately change a group, and always ensure that the installation plate and the vertical rod can stably rotate in cooperation during the rotation of the shaft once, which effectively guarantees the accurate relative angle of the vertical rod during rotation and provides guarantee for the stable operation of the whole device;

[0020] III. In the utility model, the guide plate and the guide hole are arranged, which can effectively guide the lead to the specific processing position of the sewing machine accurately and reliably, provide reliable guarantee for the sewing machine to use the lead for operation in the subsequent processing process, and ensure the continuity and accuracy of the lead link in the sewing process;

[0021] IV. The utility model discloses a positioning sheet and a positioning bolt, which can adjust the height of the guide plate and the guide hole, so as to adjust the guide hole to the required position, without adjusting the lead in one of the guide holes. The lead guiding mechanism is more flexible when used;

[0022] In summary, the utility model can adapt to a variety of coil specifications or types for simultaneous standby, and quickly convert the required vertical rods to the use position. It can also play an effective role in the batch clothing production process where coils are frequently changed, and can more fully meet the needs of flexible coil switching. Compared with the method of frequently replacing individual coils, it can improve production efficiency. Whenever the rotating seat completes a rotation cycle, the mounting plate and the vertical rod at the top will accurately change a group, which can stably realize the coordinated rotation of the mounting plate and the vertical rod, and effectively ensure the precise relative angle of the vertical rod during the rotation process. In addition, a guide plate and a guide hole are provided, which can effectively and accurately guide the lead wire to the specific processing position of the sewing machine, thereby providing a reliable guarantee for the sewing machine to smoothly use the lead wire for operation in the subsequent processing process, and ensuring the continuity and accuracy of the lead wire link in the sewing process. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a structural diagram of the mounting plate of the utility model;

[0024] Figure 2 This is a schematic diagram of the cross-sectional structure of the seat body of the utility model;

[0025] Figure 3 This is a schematic structural diagram of the rotating seat of the utility model;

[0026] Figure 4 This is a schematic structural diagram of the support arm of the utility model;

[0027] Figure 5 This is a structural diagram of the guide seat of the utility model;

[0028] Figure 6 for Figure 5 A magnified view of point A;

[0029] Figures 1 to 6 In the middle, 1. seat body, 2. rotating shaft, 3. rotating seat, 4. slide groove, 5. recessed part, 6. rotating rod, 7. limit block, 8. turntable, 9. toggle pin, 10. worm gear, 11. worm, 12. handwheel, 13. mounting plate, 14. vertical rod, 15. support arm, 16. guide seat, 17. guide plate, 18. guide hole, 19. positioning piece, 20. positioning bolt. DETAILED DESCRIPTION

[0030] The following is a combination of specific implementation cases and attached Figures 1 to 6 The present invention will be further described below, but the present invention is not limited to these embodiments.

[0031] See Figures 1 to 6As shown in the figure, a sewing machine thread guide mechanism, including a seat body 1, the middle part of the seat body 1 is rotatably arranged with a rotating shaft 2 along the vertical direction through the bearing, the top end of the rotating shaft 2 penetrates the seat body 1 upward and is connected with a plurality of placement assemblies, the placement assemblies are used for placing different coils, the rotation of the rotating shaft 2 promotes the rotation of the placement assemblies, so as to realize the adjustment of the position of different coils of the sewing machine, the rotating shaft 2 is rotatably and intermittently driven by a driving mechanism;

[0032] Referring mainly to Figure 2 and Figure 3 As shown in the figure, the driving mechanism includes a rotating seat 3 fixedly installed on the rotating shaft 2, a plurality of sliding grooves 4 and recesses 5 are equidistantly arranged on the upper surface edge of the rotating seat 3 along the circumference, the number of the sliding grooves 4 and the recesses 5 is the same, which is six, and each sliding groove 4 and each recess 5 are arranged adjacent to each other, a rotating rod 6 is arranged in the seat body 1 along the horizontal direction, the rotating rod 6 is fixedly installed with a rotating disc 8, a limiting block 7 is installed on the side of the rotating disc 8 close to the rotating seat 3, a pushing pin 9 is installed on the side wall of the rotating disc 8, the pushing pin 9 is arranged obliquely relative to the rotating disc 8, and the pushing pin 9 is rotatably embedded in the inner cavity of one of the sliding grooves 4, and the outer side wall of the limiting block 7 is rotatably attached to one of the recesses 5; the shape of the outer side wall of the limiting block 7 and the recess 5 is matched, so that when the limiting block 7 is rotatably attached to the recess 5, the recess 5 can remain stable and not rotate; the driving mechanism further includes a worm wheel 10 fixedly installed on the rotating rod 6, a worm 11 is rotatably arranged in the seat body 1 through the bearing, the worm 11 is meshingly connected with the bottom end side wall of the worm wheel 10, and the worm 11 can drive the worm wheel 10 to rotate by driving, so as to realize the rotation of the rotating rod 6;

[0033] The rotating rod 6 promotes the circumferential rotation of the rotating disc 8, the pushing pin 9 and the worm wheel 10, when the pushing pin 9 rotates into the inner cavity of one of the sliding grooves 4, the continuously rotating pushing pin 9 pushes the sliding groove 4 and the rotating seat 3 to rotate synchronously, so as to drive the rotating shaft 2 in the rotating seat 3 to rotate, so as to realize the rotation of the placement assembly at the top end of the rotating shaft 2, thereby realizing the conversion of the position of the placement assembly and the coil; when the continuously rotating pushing pin 9 is separated from the sliding groove 4, the limiting block 7 at this time is rotated to be attached to one of the recesses 5, and the recess 5 is limited, at this time, the recess 5 no longer continues to rotate, so as to realize the locking of the position after the coil rotates.

[0034] Referring in detail to Figure 1 As shown in the figure, each group of placement assemblies includes an installation plate 13 respectively installed on the side wall of the top end of the rotating shaft 2, a plurality of vertical rods 14 are vertically installed on the upper surface of the installation plate 13, the vertical rods 14 are equidistantly and spacedly arranged, and a plurality of various coils to be used are placed on the vertical rods 14, thereby meeting the placement requirements of various coils.

[0035] In addition, in order to facilitate the driving of the worm 11 to rotate, the end of the worm 11 extends out of the outer wall of the base 1 and is installed with a handwheel 12. By driving the handwheel 12, the worm 11 can be driven to rotate more conveniently and quickly.

[0036] In order to avoid interference or obstruction of the leads directly extending from the vertical rod 14 at other vertical rods 14, the leads extending from the vertical rod 14 need to be guided to a sufficiently high or far distance from the vertical rod 14. Figures 4 to 6 As shown, a guide mechanism is provided on the side wall of the base body 1; the guide mechanism includes a support arm 15 fixedly mounted on the side wall of the base body 1, and a plurality of guide components are provided on the support arm 15, through which the lead end of the vertical rod 14 is extended to a suitable position; each group of guide components includes a guide seat 16 fixed and perpendicular to the upper surface of the support arm 15, and a guide plate 17 is provided in the guide seat 16 for sliding along the vertical direction, and the guide plate 17 is provided with a plurality of guide holes 18 equidistant from top to bottom. By passing the lead end of the vertical rod 14 through the guide holes 18 at different heights, the lead end can be guided to different heights or positions, thereby meeting the function of flexible guidance of the lead end.

[0037] See Figure 6 As shown, a positioning assembly is provided at the guide plate 17 and the guide seat 16; the positioning assembly includes two positioning pieces 19 fixedly mounted on the top of the guide seat 16, and a positioning bolt 20 is threadedly embedded between the two positioning pieces 19, and the positioning bolt 20 passes through the inner cavity of one of the guide holes 18. When it is desired to adjust the height of the end of the traction line, the positioning bolt 20 is disengaged from the positioning piece 19 and the guide hole 18, and the guide plate 17 is moved along the inner cavity of the guide seat 16 to achieve the height adjustment of the guide plate 17, that is, the height adjustment of the end of the vertical rod 14 line guided in the guide hole 18 is achieved without removing the end of the line at the vertical rod 14 from the guide hole 18. After adjustment, the positioning bolt 20 is re-passed through the positioning piece 19 and the inner cavity of the corresponding guide hole 18 at this time, thereby achieving the locking limit of the adjusted guide plate 17 at the guide seat 16.

[0038] It is worth noting that in the present application, the worm wheel 10 and the worm 11 are of the types of worm wheels and worms commonly used in the market. The two can be used in conjunction with each other to achieve meshing rotation and self-locking after rotation. Their models are not limited or elaborated here; the models of the above-mentioned existing components are not limited or elaborated here.

[0039] The working principle of the thread guide mechanism of a sewing machine in this embodiment is as follows:

[0040] When the toggle pin 9 is rotated to enter the inner cavity of one of the slide grooves 4, the toggle pin 9 that continues to rotate to toggle the slide groove 4 and the rotating seat 3 rotate synchronously to drive the rotating shaft 2 in the rotating seat 3 to rotate, so as to realize the rotation of the mounting plate 13 and the vertical rod 14 at the top of the rotating shaft 2, thereby realizing the conversion of the vertical rod 14; when the toggle pin 9 that continues to rotate is out of the slide groove 4, the limit block 7 is rotated to fit one of the recessed parts 5, limiting the recessed part 5, and the recessed part 5 no longer continues to rotate, thereby realizing the stability of the rotating seat 3 and the rotating shaft 2 after rotation, that is, realizing the stability of the mounting plate 13 and the vertical rod 14 after rotation;

[0041] The end of the line of the adjusted vertical rod 14 is passed through one of the guide holes 18. The guide holes 18 of different heights can guide the end of the line of the vertical rod 14 at different heights. When the height of the end of the traction line needs to be adjusted, the positioning bolt 20 is separated from the positioning piece 19 and the guide hole 18, and the guide plate 17 is moved along the inner cavity of the guide seat 16 to achieve the adjustment of the guide plate 17 in height, that is, the height of the end of the line of the vertical rod 14 guided in the guide hole 18 is adjusted without removing the end of the line at the vertical rod 14 from the guide hole 18. After adjustment, the positioning bolt 20 is re-passed through the positioning piece 19 and the inner cavity of the corresponding guide hole 18, thereby achieving the locking limit of the adjusted guide plate 17 at the guide seat 16.

[0042] The present invention can adapt to a variety of coil specifications or types for simultaneous standby, and quickly convert the required vertical rod 14 to the use position. It can also play an effective role in the batch clothing production process where coils are frequently changed, and can fully meet the needs of flexible coil switching. Compared with the method of frequently replacing individual coils, it can improve production efficiency. Whenever the rotating seat 3 completes a rotation cycle, the mounting plate 13 and the vertical rod 14 at the top will accurately change a group, which can stably realize the coordinated rotation of the mounting plate 13 and the vertical rod 14 as a group of components, and effectively ensure the precise relativity of the angle of the vertical rod 14 during the rotation process. In addition, a guide plate 17 and a guide hole 18 are provided, which can effectively and accurately guide the lead wire to the specific processing position of the sewing machine, thereby providing a reliable guarantee for the sewing machine to smoothly use the lead wire for operation in the subsequent processing process, and ensuring the continuity and accuracy of the lead wire link in the sewing process.

[0043] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A thread guide mechanism for a sewing machine, comprising a base (1), characterized in that: A rotating shaft (2) is provided in the middle of the seat body (1) for rotation in the vertical direction. The top end of the rotating shaft (2) passes through the seat body (1) upward and is connected to a plurality of placement components. The rotating shaft (2) is intermittently rotated and locked in a circumferential direction by a driving mechanism. The driving mechanism comprises a rotating seat (3) fixedly mounted on the rotating shaft (2), a plurality of sliding grooves (4) and recessed portions (5) are equidistantly provided at the edge of the upper surface of the rotating seat (3) along the circumferential direction, the sliding grooves (4) and the recessed portions (5) are arranged in the same number, and each sliding groove (4) and each recessed portion (5) are arranged adjacent to each other, a rotating rod (6) is arranged in the horizontal direction inside the seat body (1), a rotating disk (8) is fixedly mounted on the rotating rod (6), a limiting block (7) is installed on the side of the rotating disk (8) close to the rotating seat (3), a toggle pin (9) is installed on the side wall of the rotating disk (8), the toggle pin (9) is tilted relative to the rotating disk (8), and the toggle pin (9) is rotatably embedded in the inner cavity of one of the sliding grooves (4), and the outer side wall of the limiting block (7) is rotatably fitted to one of the recessed portions (5).

2. A sewing machine thread guide mechanism according to claim 1, characterized in that: Each group of the placement components comprises a mounting plate (13) respectively mounted on the top side wall of the rotating shaft (2); a plurality of vertical rods (14) are vertically mounted on the upper surface of the mounting plate (13); and the vertical rods (14) are arranged at equal intervals.

3. The thread guide mechanism for a sewing machine according to claim 1, wherein: The outer side wall of the limiting block (7) is adapted to the shape of the recessed portion (5).

4. A thread guide mechanism for a sewing machine according to claim 1, characterized in that: The driving mechanism further comprises a worm wheel (10) fixedly mounted on the rotating rod (6); a worm (11) is rotatably arranged in the seat body (1); and the worm (11) is meshedly connected with the side wall of the bottom end of the worm wheel (10).

5. A thread guide mechanism for a sewing machine according to claim 4, characterized in that: The end of the worm (11) extends out of the outer wall of the seat (1) and is provided with a hand wheel (12).

6. The thread guide mechanism for a sewing machine according to claim 1, characterized in that: The side wall of the seat body (1) is provided with a guiding mechanism; The guiding mechanism comprises a supporting arm (15) fixedly mounted on the side wall of the seat body (1), and a plurality of guiding components are arranged on the supporting arm (15).

7. A thread guide mechanism for a sewing machine according to claim 6, characterized in that: Each group of the guide components includes a guide seat (16) fixed and perpendicular to the upper surface of the support arm (15), a guide plate (17) is provided in the guide seat (16) for sliding in the vertical direction, and a plurality of guide holes (18) are provided on the guide plate (17) at equal intervals from top to bottom.

8. The thread guide mechanism for a sewing machine according to claim 7, characterized in that: Positioning components are provided at the guide plate (17) and the guide seat (16); The positioning assembly includes two positioning pieces (19) fixedly mounted on the top of the guide seat (16), a positioning bolt (20) is threadedly embedded between the two positioning pieces (19), and the positioning bolt (20) passes through the inner cavity of one of the guide holes (18).

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