CN218059437U - Mechanism for simultaneously controlling needle pitch and lifting presser foot by stepping motor - Google Patents
Mechanism for simultaneously controlling needle pitch and lifting presser foot by stepping motor Download PDFInfo
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- CN218059437U CN218059437U CN202222016649.5U CN202222016649U CN218059437U CN 218059437 U CN218059437 U CN 218059437U CN 202222016649 U CN202222016649 U CN 202222016649U CN 218059437 U CN218059437 U CN 218059437U
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- cam
- needle pitch
- stepping motor
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Abstract
The utility model relates to a mechanism for simultaneously controlling the needle pitch and lifting the presser foot by a stepping motor. The method aims to solve the problems of low needle pitch size adjustment precision, difficult adjustment and cost saving. The technical scheme of the utility model includes: the output shaft end of the stepping motor is provided with a stitch length driving wheel and a pressure-lifting cam component, a stitch length driven wheel is arranged on a stitch length cam shaft, a U-shaped elongated slot is arranged on an extension line of a central hole of the stitch length driven wheel, two fan-shaped notches are fixedly arranged on two sides of the U-shaped elongated slot and are symmetrical, and a stitch length cam connecting rod connects the stitch length driven wheel with a stitch length adjusting frame; the left side of the output shaft of the stepping motor is provided with a knee control rod, the top end of the knee control rod is connected with a knee control lifting lever, a lifting and pressing sliding block is arranged on an inner hexagonal cylindrical screw of the lifting clamping block, a square notch is arranged on the lifting and pressing sliding block, circular through holes are arranged on two sides of the notch, the small hole end of the Z-shaped lifting and pressing cam rod is fixedly connected with the lifting and pressing sliding block through a pin shaft, and one end of the pin shaft is fixed by an E-shaped clamp spring.
Description
Technical Field
The utility model relates to a sewing machine technical field, concretely relates to by step motor simultaneous control gauge needle and lift mechanism of presser foot.
Background
Most of the existing double-needle machines rely on a needle distance knob to manually adjust the needle distance or are independently controlled by a stepping motor, the needle distance adjusting precision is low and the adjustment is not easy, the stepping motor and an electromagnet respectively control the needle distance adjusting and the presser foot lifting, the cost is increased, and resources are wasted.
The double-needle sewing machine has different feeding modes, so that the structure is difficult to apply, and different from the common single-needle flat sewing machine, the double-needle sewing machine has the feeding mode that the needle bar and the cloth feeding tooth feed synchronously, the needle pitch is not only adjusted in the motion range of the cloth feeding tooth, but also the swing of the needle bar is changed, and thus, the accuracy and the stability difficulty of the needle pitch adjustment are increased.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model provides a solve the problem that the gauge length size adjustment precision is low, the adjustment is difficult and practice thrift the cost, provide a mechanism by step motor simultaneous control gauge length and lift the presser foot, its operation process through step motor's positive and negative rotation control gauge length action wheel and lift the cam circular motion of pressing and drive the connecting rod and realize the regulation of gauge length size and lift the presser foot function.
For solving the problems existing in the prior art, the technical scheme of the utility model is that: the mechanism simultaneously controls the needle pitch and lifts the presser foot by the stepping motor, and comprises the stepping motor, a knee control rod, a knee control lifting lever and a presser foot assembly, wherein the upper part of the knee control rod is fixedly connected with the knee control lifting lever, and the knee control lifting lever is connected with the left ear of a knee control connecting rod of the presser foot assembly to realize the up-and-down movement of the presser foot assembly; the method is characterized in that:
the output shaft of the stepping motor is sequentially sleeved with a stitch length driving wheel, a pressure lifting cam and a pressure lifting cam cover plate;
the middle part of the knee control rod is fastened through a left lifting clamping block and a right lifting clamping block, the bottom of the left lifting clamping block is movably connected with a pressure lifting sliding block through an inner hexagonal socket head cap screw, the pressure lifting sliding block slides up and down along the inner hexagonal socket head cap screw, the structure of the pressure lifting cam rod comprises a Z-shaped rod which is integrally arranged on a circular ring, a pressure lifting cam cover plate is fixedly arranged on the circular ring of the pressure lifting cam rod, the upper end of the Z-shaped rod of the pressure lifting cam rod is clamped in a U-shaped groove of the pressure lifting sliding block, and the pressure lifting sliding block is driven to move up and down through the rotation of the pressure lifting cam rod;
a needle pitch cam shaft is arranged in parallel with an output shaft of the stepping motor, and a needle pitch driven wheel is fixedly arranged on the needle pitch cam shaft and matched with the needle pitch driving wheel; one end of the needle pitch cam connecting rod is fixed on the needle pitch driven wheel, and the other end of the needle pitch cam connecting rod is fixed on one side of the needle pitch adjusting frame.
The needle pitch driving wheel is circular in structure, an arc-shaped notch is formed in the circular shape, and a cylindrical head for driving is arranged at the end of the arc-shaped notch; the stitch length driven wheel is provided with a U-shaped groove matched with the cylindrical head and an arc-shaped surface matched with the arc-shaped notch.
The pressure lifting cam and the pressure lifting cam cover plate are provided with a large round hole and a small round hole which correspond to each other in position; the pressure lifting cam and the pressure lifting cam cover plate are connected to an output shaft of the stepping motor through a large circular hole and are fixedly connected through two small circular holes.
One side of the lifting and pressing sliding block is provided with a U-shaped groove, the other side of the lifting and pressing sliding block is provided with a hole used for penetrating through an inner hexagonal socket head cap screw from top to bottom, a pin hole is formed in the middle of the two side faces of the U-shaped groove, a pin shaft penetrates through the pin hole, and the pin shaft penetrates through the pin hole and then is fixed through an E-shaped clamp spring.
And the opposite surfaces of the left lifting clamping block and the right lifting clamping block are respectively provided with a column-shaped cambered surface which is fixedly connected with the knee control rod through the column-shaped cambered surfaces.
The needle pitch cam connecting rod is a Z-shaped rod, and two ends of the needle pitch cam connecting rod are fixedly connected with the needle pitch driven wheel and the needle pitch adjusting frame through shaft position screws respectively.
The pressure lifting cam is provided with a step, and the pressure lifting cam rod ring is clamped on the pressure lifting cam rod through the step.
The left lifting clamping block is provided with a threaded through hole from top to bottom, and the inner hexagonal socket head cap screw is fixed in the through hole of the left lifting clamping block.
The needle pitch cam shaft is fixed on the casing.
The working method of the mechanism for simultaneously controlling the needle pitch and lifting the presser foot by the stepping motor comprises the following steps:
1) When the machine normally works, the presser foot is put down, the stepping motor rotates in the positive direction to drive the needle pitch driving wheel to rotate, the cylindrical head of the needle pitch driving wheel is matched with the U-shaped groove on the needle pitch driven wheel 3, the needle pitch driven wheel is driven to rotate by a corresponding angle when the needle pitch driving wheel rotates by a corresponding angle, and the needle pitch cam connecting rod matched with the needle pitch driving wheel does up-down and left-right circular motion so as to drive the needle pitch adjusting frame to rotate by a certain angle to realize adjustment of the needle pitch;
2) In the process of adjusting the needle pitch, the pressure raising and pressing sliding block driven by the pressure raising and pressing cam rod moves, and the highest position of the pressure raising and pressing sliding block on the inner hexagonal socket cap screw is always lower than the fixed position of the left lifting clamping block when the current pressure foot falls down, so that the pressure foot is always attached to the needle plate in the process;
3) When the presser foot needs to be lifted, the stepping motor starts to rotate reversely, the cylinder head of the needle pitch driving wheel is separated from the U-shaped groove on the needle pitch driven wheel, meanwhile, the arc surface of the arc-shaped notch of the needle pitch driving wheel is meshed with the arc surface of the needle pitch driven wheel, the relative position of the needle pitch driven wheel is limited, when the needle pitch driving wheel continues to rotate again, the needle pitch driven wheel is relatively static, the pressure lifting cam wheel rotates to drive the pressure lifting cam rod to move, so that the pressure lifting sliding block is driven to move upwards along the inner hexagon socket head screw, when the upper surface of the pressure lifting sliding block is superposed with the lower surface of the left lifting clamping block, the pressure lifting cam rod is driven to move upwards, then the knee control rod is driven to move upwards to push the knee control lifting lever to rotate, and finally the presser foot component is lifted;
4) When sewing needs to be started again, the presser foot falls down, the stepping motor rotates positively at the moment, the lifting cam wheel rotates to drive the lifting cam wheel rod to move, so that the lifting sliding block is driven to move downwards along the hexagon socket head cap screw, the lifting sliding block is separated from the left lifting clamping block, the presser foot in the presser foot assembly falls down, and meanwhile, the cylindrical head of the needle pitch driving wheel is matched with the U-shaped groove on the needle pitch driven wheel.
5) The steps 1), 2), 3) and 4) are a complete motion process, and then the steps 1) to 4) are repeated to realize the control of the needle gauge and the lifting of the presser foot.
Compared with the prior art, the utility model has the advantages as follows:
1. the utility model adopts the tangent match of the needle pitch driving wheel cylinder head and the needle pitch driven wheel U-shaped groove, which makes the setting of the needle pitch more accurate;
2. the utility model adopts a stepping motor to simultaneously control the adjustment of the needle pitch and the lifting of the presser foot, thereby solving the problem of expensive cost of using one stepping motor or electromagnet and saving the cost;
3. the utility model discloses ingenious application the motor just reverse and correspond the angle, the motor corotation, the gauge needle action wheel cylinder head cuts into gauge needle from driving wheel "U type groove" and makes it rotate and drive the gauge needle switch and rotate, the corresponding angle of every turn corresponds the adjustment not equidimension gauge needle, gauge needle action wheel cylinder head breaks away from with "U" type groove when the motor reverses, the gauge needle from the driving wheel at this moment relies on the cooperation of arc breach to keep static relatively, the motor continues to reverse simultaneously and corresponds the angle and lifts the cam and follows the rotation and drive the presser foot and lift up corresponding height, this kind uses tangent cooperation and cylinder upper and lower dual location and direction, make the structure more simple and accurate;
4. the utility model discloses simple structure has realized the arbitrary adjustment of the size of gauge needle and the height of presser foot to increased function electron and transferred gauge needle function and electron pressure regulation foot high function, made its precision higher, the operation is simpler, and all adjustments are gone on through the operation screen parameter, have beautifully shown the appearance.
Drawings
FIG. 1 is a view of the structure of the present invention;
FIG. 2 is a reference diagram of the present invention in a state of using the gauge;
FIG. 3 is a reference diagram of the state of the presser foot lifting device of the present invention;
FIG. 4 is a schematic view of the engagement between the pitch driven wheel and the pitch driving wheel;
description of the drawings: 1-a stepping motor, 2-a needle pitch driving wheel, 3-a needle pitch driven wheel, 4-a needle pitch cam shaft, 5-a needle pitch cam connecting rod, 6-an axis position screw, 7-a needle pitch adjusting frame, 8-a lifting and pressing cam, 9-a lifting and pressing cam rod, 10-a lifting and pressing cam cover plate, 11-an inner hexagonal socket head screw, 12-a pin shaft, 13-a left lifting clamping block and 14-a right lifting clamping block; 15-lifting and pressing sliding block, 16-E type clamp spring, 17-knee control rod, 18-knee control lifting lever and 19-presser foot component; 20-cylindrical head, 21-arc notch, 22-U-shaped groove and 23-arc surface.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The utility model provides a mechanism for simultaneously controlling the needle pitch and lifting the presser foot by a stepping motor, which comprises a stepping motor 1, a needle pitch driving wheel 2, a needle pitch driven wheel 3, a needle pitch camshaft 4, a needle pitch cam connecting rod 5, a shaft position screw 6, a needle pitch adjusting frame 7, a lifting and pressing cam 8, a lifting and pressing cam rod 9, a lifting and pressing cam cover plate 10, an inner hexagonal socket head cap screw 11, a pin shaft 12, a left lifting clamping block 13 and a right lifting clamping block 14; a lifting and pressing sliding block 15, an E-shaped clamp spring 16, a knee control rod 17, a knee control lifting lever 18 and a presser foot assembly 19, as shown in figure 1.
The knee control rod 17 is connected with the left hole of the knee control lifting lever 18 through an axial screw, the lower hole of the knee control lifting lever 18 is connected with the presser foot component 19, and the presser foot component 19 moves up and down through the left ear connection of the knee control connecting rod.
The needle pitch driving wheel 2 is circular, an arc-shaped notch 21 is arranged on the circular structure, and a cylindrical head 20 for driving is arranged at the end part of the arc-shaped notch (the rotating angle of a stepping motor required by forward rotation for adjusting the needle pitch is about 50 degrees, and the separation angle between a lifting sliding block and a lifting clamping block is 100 degrees at the moment, so that a presser foot is bound to a needle plate); the pitch driven wheel 3 is provided with a 'U' -shaped groove 22 matched with the cylindrical head 20 and an arc-shaped surface 23 matched with the arc-shaped notch, as shown in fig. 4.
The pressure-lifting cam 8 and the pressure-lifting cam cover plate 10 are provided with a large round hole and a small round hole which correspond to each other in position; the pressure lifting cam 8 is provided with a step, the step is clamped at the position of the circular ring of the pressure lifting cam rod 9, and the pressure lifting cam cover plate 10 is also clamped at the position of the circular ring of the pressure lifting cam rod 9.
An output shaft of the stepping motor 1 is sequentially sleeved with a needle pitch driving wheel 2, a lifting and pressing cam 8 and a lifting and pressing cam cover plate 10, and the lifting and pressing cam cover plate 10 is fixed with a through hole corresponding to the lifting and pressing cam 8 through a screw; the pressure-lifting cam 8 and the pressure-lifting cam cover plate 10 are connected to an output shaft of the stepping motor 1 through a large circular hole and are fixedly connected through two small circular holes; a needle pitch cam shaft 4 is arranged at the position horizontally equal to the right side of the output shaft of the stepping motor 1, a needle pitch driven wheel 3 is fixedly arranged on the needle pitch cam shaft 4 and is matched with the needle pitch driving wheel 2, a cylindrical head on the needle pitch driving wheel 2 is in tangential fit with a U-shaped groove on the needle pitch driven wheel 3 to rotate when acting, and meanwhile, the arc surface of the needle pitch driving wheel 2 is matched with the arc notch of the needle pitch driven wheel 3 for use; the needle pitch camshaft 4 is fixed on the machine shell; the needle pitch cam connecting rod 5 is a Z-shaped rod, two ends of the Z-shaped rod are fixedly connected with the needle pitch driven wheel 3 and the needle pitch adjusting frame 7 through shaft position screws 6 respectively, a U-shaped elongated slot is formed in an extension line of a central hole of the needle pitch driven wheel 3, and two fan-shaped notches are fixedly arranged on two sides of the U-shaped elongated slot and are symmetrical.
The opposite surfaces of the left lifting clamping block 13 and the right lifting clamping block 14 are respectively provided with a columnar cambered surface which is fixedly connected with a knee control rod 17 through the columnar cambered surface, one side of the left lifting clamping block 13 is provided with a threaded through hole from top to bottom, an inner hexagonal socket head cap screw 11 is fixed in the through hole of the left lifting clamping block 13, a lifting and pressing sliding block 15 is arranged on the inner hexagonal socket head cap screw 11 at the bottom of the left lifting clamping block 13 and slides up and down along the inner hexagonal socket head cap screw 11, the lifting and pressing cam rod 9 structurally comprises a Z-shaped rod which is integrally arranged on a circular ring, a lifting and pressing cam cover plate 10 is fixedly arranged on the circular ring of the lifting and pressing cam rod 9, the upper end of the Z-shaped rod of the lifting and pressing cam rod 9 is clamped in a U-shaped groove of the lifting and pressing sliding block 15, and the lifting and pressing sliding block 15 is driven to move up and down through the rotation of the lifting and pressing cam rod 9; a pin hole is formed in the middle of the two side faces of the U-shaped groove on one side of the lifting and pressing sliding block 15, a pin shaft 12 penetrates through the pin hole, and the pin shaft 12 penetrates through the pin hole and then is fixed through an E-shaped clamp spring 16.
The utility model provides a by step motor simultaneous control gauge needle and lift the operating method step of mechanism of presser foot do:
1) At the beginning, the machine works normally, the presser foot is put down, as shown in fig. 2, the stepping motor 1 rotates forward to drive the needle pitch driving wheel 2 to rotate, the cylindrical head 20 of the needle pitch driving wheel 2 is matched with the U-shaped groove 22 on the needle pitch driven wheel 3, meanwhile, the arc notch 21 of the needle pitch driving wheel 2 is contacted with the arc surface 23 of the needle pitch driven wheel 3, the needle pitch driven wheel 3 is driven to rotate by a corresponding angle when the needle pitch driving wheel 2 rotates by a corresponding angle, and the needle pitch cam connecting rod 5 matched with the needle pitch driving wheel performs vertical and horizontal circular motion so as to drive the needle pitch adjusting frame 7 to rotate by a certain angle to realize the adjustment of the needle pitch;
2) In the process of adjusting the needle pitch, the lifting and pressing sliding block 15 driven by the lifting and pressing cam rod 9 moves, and the highest position of the lifting and pressing sliding block 15 at the inner hexagonal socket head cap screw 11 is always lower than the fixed position of the left lifting clamping block 13 when the current presser foot falls down, so that the presser foot is always attached to the needle plate in the process;
3) When the presser foot needs to be lifted, as shown in fig. 3, the stepping motor 1 starts to rotate reversely, the cylindrical head of the needle pitch driving wheel 2 is separated from the U-shaped groove on the needle pitch driven wheel 3, meanwhile, the arc surface of the arc-shaped notch 21 of the needle pitch driving wheel 2 is meshed with the arc surface of the needle pitch driven wheel 3, the relative position of the needle pitch driven wheel 3 is limited, when the needle pitch driving wheel 2 continues to rotate again, the needle pitch driven wheel 3 is relatively static, at the moment, the lifting cam 8 rotates to drive the lifting cam rod 9 to move, so that the lifting sliding block 15 is driven to move upwards along the inner hexagonal cylindrical head screw 11, when the upper surface of the lifting sliding block 15 is superposed with the lower surface of the left lifting clamping block 13, the lifting sliding block is driven to move upwards, then the knee control rod 17 is driven to move upwards to push the knee control lifting lever 18 to rotate, and finally the presser foot in the presser foot assembly 19 is lifted;
4) When sewing needs to be started again, the presser foot falls down, at the moment, the stepping motor 1 rotates forwards, the lifting and pressing cam 8 rotates to drive the lifting and pressing cam rod 9 to move, so that the lifting and pressing sliding block 15 is driven to move downwards along the hexagon socket head cap screw 11, the lifting and pressing sliding block 15 is separated from the left lifting clamping block 13, the presser foot in the presser foot assembly 19 falls down, and meanwhile, the cylindrical head of the needle pitch driving wheel 2 is matched with the U-shaped groove 22 in the needle pitch driven wheel 3.
5) The steps 1), 2), 3) and 4) are a complete motion process, and then the steps 1) to 4) are repeated to realize the control of the needle gauge and the lifting of the presser foot.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention.
Claims (8)
1. A mechanism for simultaneously controlling stitch length and lifting a presser foot by a stepping motor comprises the stepping motor (1), a knee control rod (17), a knee control lifting lever (18) and a presser foot component (19), wherein the upper part of the knee control rod (17) is fixedly connected with the knee control lifting lever (18), and the knee control lifting lever (18) is connected with the left ear of a knee control connecting rod of the presser foot component (19) to realize the up-and-down movement of the presser foot component (19); the method is characterized in that:
an output shaft of the stepping motor (1) is sequentially sleeved with a needle pitch driving wheel (2), a pressure lifting cam (8) and a pressure lifting cam cover plate (10);
the middle part of the knee control rod (17) is fastened through a left lifting clamping block (13) and a right lifting clamping block (14), the bottom of the left lifting clamping block (13) is movably connected with a lifting and pressing sliding block (15) through an inner hexagonal socket head cap screw (11), the lifting and pressing sliding block (15) slides up and down along the inner hexagonal socket head cap screw (11), the lifting and pressing cam rod (9) structurally comprises a Z-shaped rod integrally arranged on a circular ring, a lifting and pressing cam cover plate (10) is fixedly arranged on the circular ring of the lifting and pressing cam rod (9), the upper end of the Z-shaped rod of the lifting and pressing cam rod (9) is clamped in a U-shaped groove of the lifting and pressing sliding block (15), and the lifting and pressing sliding block (15) is driven to move up and down through the rotation of the lifting and pressing cam rod (9);
a needle pitch cam shaft (4) is arranged in parallel with an output shaft of the stepping motor (1), and a needle pitch driven wheel (3) is fixedly arranged on the needle pitch cam shaft (4) and is matched with the needle pitch driving wheel (2); one end of the needle pitch cam connecting rod (5) is fixed on the needle pitch driven wheel (3), and the other end is fixed on one side of the needle pitch adjusting frame (7);
the needle pitch driving wheel (2) is circular in structure, an arc-shaped notch (21) is formed in the circular shape, and a cylindrical head (20) for driving is arranged at the end part of the arc-shaped notch; the stitch length driven wheel (3) is provided with a U-shaped groove (22) matched with the cylindrical head (20) and an arc-shaped surface (23) matched with the arc-shaped notch.
2. The mechanism for simultaneously controlling the needle gauge and lifting the presser foot by the stepping motor as claimed in claim 1, wherein: the pressure lifting cam (8) and the pressure lifting cam cover plate (10) are provided with a large round hole and a small round hole which correspond to each other in position; the pressure lifting cam (8) and the pressure lifting cam cover plate (10) are connected to an output shaft of the stepping motor (1) through a large circular hole and are fixedly connected through two small circular holes.
3. A mechanism for simultaneously controlling needle gauge and presser foot lifting by a stepping motor as claimed in claim 1 or 2, wherein: a U-shaped groove is formed in one side of the lifting and pressing sliding block (15), a hole for penetrating through an inner hexagonal socket head cap screw (11) is formed in the other side of the lifting and pressing sliding block from top to bottom, a pin hole is formed in the middle of each of two side faces of the U-shaped groove, a pin shaft (12) penetrates through the pin hole, and the pin shaft (12) penetrates through the pin hole and then is fixed through an E-shaped clamp spring (16).
4. A mechanism for simultaneously controlling needle gauge and lifting presser foot by a stepping motor as claimed in claim 3, wherein: and the opposite surfaces of the left lifting clamping block (13) and the right lifting clamping block (14) are respectively provided with a columnar cambered surface which is fixedly connected with a knee control rod (17) through the columnar cambered surfaces.
5. The mechanism for simultaneously controlling the needle gauge and lifting the presser foot by the stepping motor as claimed in claim 4, wherein: the needle pitch cam connecting rod (5) is a Z-shaped rod, and two ends of the needle pitch cam connecting rod are fixedly connected with the needle pitch driven wheel (3) and the needle pitch adjusting frame (7) through shaft position screws (6).
6. The mechanism for simultaneously controlling the needle pitch and the presser foot lifting by the stepping motor as claimed in claim 5, wherein: the lifting and pressing cam (8) is provided with a step, and the step is clamped at the circular ring of the lifting and pressing cam rod (9).
7. The mechanism for simultaneously controlling the needle gauge and lifting the presser foot by the stepping motor as claimed in claim 6, wherein: the left lifting clamping block (13) is provided with a threaded through hole from top to bottom, and the inner hexagonal socket head cap screw (11) is fixed in the through hole of the left lifting clamping block (13).
8. The mechanism for simultaneously controlling the needle gauge and lifting the presser foot by the stepping motor as claimed in claim 7, wherein: the needle pitch camshaft (4) is fixed on the machine shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222016649.5U CN218059437U (en) | 2022-08-02 | 2022-08-02 | Mechanism for simultaneously controlling needle pitch and lifting presser foot by stepping motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222016649.5U CN218059437U (en) | 2022-08-02 | 2022-08-02 | Mechanism for simultaneously controlling needle pitch and lifting presser foot by stepping motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218059437U true CN218059437U (en) | 2022-12-16 |
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ID=84400794
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222016649.5U Active CN218059437U (en) | 2022-08-02 | 2022-08-02 | Mechanism for simultaneously controlling needle pitch and lifting presser foot by stepping motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218059437U (en) |
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2022
- 2022-08-02 CN CN202222016649.5U patent/CN218059437U/en active Active
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