Thread trimming and presser foot lifting drive for a sewing machine

Abstract

The utility model discloses a sewing machine's cut line lift pressure drive arrangement, it is located on the casing, include: mounting panel, the mounting panel is located on the casing, lift pressure transmission part, lift pressure transmission part is connected on the casing and mounting panel respectively, cut line transmission part, cut line transmission part is connected with the casing, drive part, it is located on the casing, it is connected and drive to lift pressure transmission part and cut line transmission part respectively, drive part includes first electromagnetic coil and second electromagnetic coil, first electromagnetic coil with second electromagnetic coil is equipped with moving part. The cut line lift pressure drive arrangement of sewing machine, through single drive piece control cut line and lift pressure function simultaneously, has eliminated the redundancy design of two sets of independent drive system, has reduced the occupied space in the casing greatly, makes the internal structure of sewing machine more compact, provides technical support for small -size design.

Description

Technical Field

[0001] This utility model relates to the field of sewing machine technology, specifically to a thread-cutting and lifting drive device for a sewing machine. Background Technology

[0002] In the field of sewing machine technology, the thread trimming and presser foot lifting functions are important components of a sewing machine, and their structural design directly affects the overall performance and space utilization of the machine. In traditional sewing machines, the thread trimming and presser foot lifting functions typically employ two independent drive structures.

[0003] This design has many problems: the two drive structures each need to occupy a certain amount of space, resulting in a relatively dispersed internal structure layout of the sewing machine, making it difficult to further reduce the overall size of the sewing machine; the two independent drive structures need to be equipped with their own power sources, transmission components, etc., which not only increases production costs, but also makes the energy consumption of the sewing machine relatively high; in addition, the existence of multiple structures also increases the probability of sewing machine failure and reduces the stability and reliability of the equipment. Utility Model Content

[0004] The purpose of this invention is to provide a thread-cutting and lifting drive device for a sewing machine to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a thread-cutting and lifting drive device for a sewing machine, which is mounted on the machine housing, comprising:

[0006] Mounting plate, the mounting plate being disposed on the housing;

[0007] A lifting and pressing transmission component, which is connected to the housing and the mounting plate respectively;

[0008] A wire-cutting drive component, which is connected to the housing;

[0009] The driving component is disposed on the housing and is mutually driven and connected to the lifting and pressing transmission component and the wire cutting transmission component. The driving component includes a first electromagnetic coil and a second electromagnetic coil, and a moving component is provided in the first electromagnetic coil and the second electromagnetic coil.

[0010] Preferably, the driving component further includes a partition disposed between the first electromagnetic coil and the second electromagnetic coil.

[0011] Preferably, the moving part is provided with a mandrel, and a first pushing member is provided at one end of the mandrel near the lifting and pressing transmission member, and a second pushing member is provided at one end of the mandrel near the wire cutting transmission member.

[0012] Preferably, the output end of the first pusher has a slot, and the inner dimension of the slot matches the outer dimension of the lifting and pressing transmission component.

[0013] Preferably, the second pusher is provided with a curved plate, which is curved and the curvature of the curve matches the outer shape of the wire shearing drive.

[0014] Preferably, the drive component further includes a sealing plate, which has an inlet / outlet hole. The inner dimension of the inlet / outlet hole matches the outer dimension of the mandrel, and a shock-absorbing pad is provided at the edge of the inlet / outlet hole on the inner side of the sealing plate.

[0015] Preferably, the outer side of the sealing plate is provided with a connecting plate for connecting the drive unit and the housing.

[0016] Preferably, there are at least two sealing plates, which are respectively disposed on both sides of the driving member, and all the sealing plates are provided with a traction member and a housing.

[0017] Preferably, the lifting and pressing transmission component includes a connecting shaft disposed on the mounting plate for rotating the lifting and pressing transmission component.

[0018] Compared with the prior art, the beneficial effects of this utility model are:

[0019] The sewing machine's thread-cutting and lifting drive device controls both thread-cutting and lifting functions simultaneously through a single drive component, eliminating the redundant design of two independent drive systems. This significantly reduces the space occupied within the machine casing, making the internal structure of the sewing machine more compact and providing technical support for miniaturization design.

[0020] The sewing machine's thread-cutting and lifting drive device, through its integrated drive system, reduces the number of power sources, transmission components, and control systems, directly lowering production costs. At the same time, the energy consumption of a single drive component is significantly lower than that of a dual-drive structure, aligning with the industry's trend towards energy conservation and environmental protection. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the casing structure of this utility model;

[0022] Figure 2 This utility model is convex Figure 1 A magnified structural diagram at point A in the diagram;

[0023] Figure 3 This is a schematic diagram of the drive component structure of this utility model;

[0024] Figure 4 This is a cross-sectional structural diagram of the drive component of this utility model.

[0025] In the diagram: 1. Housing; 2. Mounting plate; 3. Drive component; 31. Traction component; 32. Connecting plate; 33. Outer shell; 34. First electromagnetic coil; 35. Partition plate; 36. Second electromagnetic coil; 37. Shock-absorbing pad; 38. Moving component; 39. Spindle; 310. First pushing component; 311. Slot; 312. Second pushing component; 313. Curved plate; 314. Sealing plate; 4. Lifting and pressing transmission component; 41. Connecting shaft; 5. Wire cutting transmission component. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Please see Figures 1-4 This utility model provides a technical solution: a thread-cutting and lifting drive device for a sewing machine, which is mounted on the machine housing 1, comprising:

[0028] Mounting plate 2 is mounted on housing 1 and is used to support the connecting shaft 41, ensuring that the lifting and pressing transmission component 4 can be driven to rotate by the driving component 3 through the connecting shaft 41, thereby driving the lifting and pressing transmission component 4 to move. The lifting and pressing transmission component 4 is connected to housing 1 and mounting plate 2 respectively. The lifting and pressing transmission component 4 includes a connecting shaft 41 mounted on mounting plate 2 for rotating the lifting and pressing transmission component 4. The connecting shaft 41 is used to allow the lifting and pressing transmission component 4 to rotate.

[0029] The thread-cutting drive component 5 is connected to the machine housing 1. The thread-cutting drive component 5 is used to control the thread-cutting mechanism of the sewing machine. The thread-cutting drive component 5 is also driven by the drive component 3 to move, thereby controlling the thread-cutting mechanism.

[0030] A driving component 3 is mounted on the housing 1. The driving component 3 is mutually driven and connected to the lifting and pressing transmission component 4 and the wire cutting transmission component 5. The driving of the lifting and pressing transmission component 4 and the wire cutting transmission component 5 are driven separately, so that driving the lifting and pressing transmission component 4 will not affect the driving of the wire cutting transmission component 5. The driving component 3 includes a first electromagnetic coil 34 and a second electromagnetic coil 36. The first electromagnetic coil 34 is used to drive the lifting and pressing transmission component 4, and the second electromagnetic coil 36 is used to drive the wire cutting transmission component 5. A moving component 38 is provided in the first electromagnetic coil 34 and the second electromagnetic coil 36. By energizing the first electromagnetic coil 34 and the second electromagnetic coil 36, the moving component 38 is controlled to move. When the first electromagnetic coil 34 is energized, the moving component 38 moves to the left, and when the second electromagnetic coil 36 is energized, the moving component 38 moves to the right.

[0031] The driving component 3 also includes a partition 35 disposed between the first electromagnetic coil 34 and the second electromagnetic coil 36. The partition 35 is used to prevent the first electromagnetic coil 34 or the second electromagnetic coil 36 from being affected by other coils when they are energized. The moving component 38 is provided with a spindle 39, which is used to drive the first pusher 310 and the second pusher 312 to move laterally. The first pusher 310 is located at the end of the spindle 39 near the lifting and pressing transmission component 4, and the second pusher 312 is located at the end of the spindle 39 near the wire cutting transmission component 5. The output end of the first pusher 310 has a slot 311. When the moving component 38 moves to the left, the slot 311 engages with the lifting and pressing transmission component 4 and then pushes the lifting and pressing transmission component 4. The lifting and pressing transmission component 4 is connected to... The shaft 41 rotates to adapt to the lifting and pressing structure and begin normal operation. The inner dimension of the slot 311 matches the outer dimension of the lifting and pressing transmission component 4, ensuring that the slot 311 can insert the lifting and pressing transmission component 4. The second pusher 312 is provided with a curved plate 313, which is used to make the wire cutting transmission component 5 fluctuate and rotate. When the second electromagnetic coil 36 is energized, the moving component 38 drives the spindle 39 to move to the right, thereby driving the second pusher 312 and the curved plate 313 to move synchronously. The second pusher 312 is used to fix the curved plate 313 on the spindle 39. The curved plate 313 is curved and the curvature of the bend matches the outer shape of the wire cutting transmission component 5, which ensures that the curved plate 313 will not detach from the wire cutting transmission component 5.

[0032] The drive unit 3 also includes a sealing plate 314. The connecting plate 32 connected to the sealing plate 314 can fix the drive unit 3 to the housing 1. The sealing plate 314 has an inlet and outlet hole. The inner size of the inlet and outlet hole matches the outer size of the spindle 39. This design allows the spindle 39 to move in and out freely. The edge of the inlet and outlet hole on the inner side of the sealing plate 314 is provided with a shock-absorbing pad 37. The shock-absorbing pad 37 can effectively prevent the moving part 38 from moving left and right and reduce the impact of the moving part 38 on the housing 33. The outer side of the sealing plate 314 is provided with a connecting plate 32 for connecting the drive unit 3 and the housing 1. There are at least two sealing plates 314, which are respectively provided on both sides of the drive unit 3. All sealing plates 314 are provided with a traction member 31 and a housing 33.

[0033] When the thread-cutting and lifting / pressing drive device of the sewing machine is in use, when the lifting / pressing function is required, the first electromagnetic coil 34 is energized, generating a magnetic field that drives the moving part 38 to move to the left. The moving part 38 drives the spindle 39 and the first pusher 310 to move to the left simultaneously. At this time, the slot 311 at the output end of the first pusher 310 engages with the lifting / pressing transmission part 4, pushing the lifting / pressing transmission part 4 to rotate around the connecting shaft 41, thereby realizing the lifting / pressing action. When the thread-cutting function is required, the second electromagnetic coil 36 is energized, and the moving part 38 moves to the right, driving the spindle 39 and the second pusher 312 to move to the right simultaneously. The curved plate 313 on the second pusher 312 moves accordingly and fits against the outside of the thread-cutting transmission part 5, driving the thread-cutting transmission part 5 to move to control the thread-cutting mechanism. The partition 35 ensures that the magnetic fields of the two electromagnetic coils do not interfere with each other, realizing independent driving of the lifting / pressing and thread-cutting functions. The shock-absorbing pad 37 on the sealing plate 314 reduces the vibration and collision during the movement of the moving part 38, ensuring the smooth operation of the device.

[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A thread-cutting and lifting drive device for a sewing machine, which is mounted on the machine housing (1), characterized in that, include: Mounting plate (2), which is disposed on the housing (1); The lifting and pressing transmission component (4) is connected to the housing (1) and the mounting plate (2) respectively; A wire cutting drive component (5) is connected to the housing (1); A driving component (3) is provided on the housing (1). The driving component (3) is mutually driven and connected to the lifting and pressing transmission component (4). The driving component (3) is mutually driven and connected to the wire cutting transmission component (5). The driving component (3) includes a first electromagnetic coil (34) and a second electromagnetic coil (36). A moving component (38) is provided in the first electromagnetic coil (34) and the second electromagnetic coil (36).

2. The thread-cutting and lifting drive device for a sewing machine according to claim 1, characterized in that: The drive unit (3) also includes a partition (35) disposed between the first electromagnetic coil (34) and the second electromagnetic coil (36).

3. A thread-cutting and lifting drive device for a sewing machine according to claim 1 or 2, characterized in that: The moving part (38) is provided with a spindle (39), and a first pusher (310) is provided at one end of the spindle (39) near the lifting and pressing transmission part (4), and a second pusher (312) is provided at one end of the spindle (39) near the wire cutting transmission part (5).

4. The thread-cutting and lifting drive device for a sewing machine according to claim 3, characterized in that: The output end of the first pusher (310) is provided with a slot (311), and the inner dimension of the slot (311) matches the outer dimension of the lifting and pressing transmission member (4).

5. The thread-cutting and lifting drive device for a sewing machine according to claim 3, characterized in that: The second pusher (312) is provided with a curved plate (313), which is curved and the curvature of the curved plate (313) matches the outer shape of the wire shearing drive (5).

6. The thread-cutting and lifting drive device for a sewing machine according to claim 3, characterized in that: The drive unit (3) also includes a sealing plate (314), which has an inlet / outlet hole. The inner dimension of the inlet / outlet hole matches the outer dimension of the spindle (39). A shock-absorbing pad (37) is provided at the edge of the inlet / outlet hole on the inner side of the sealing plate (314).

7. The thread-cutting and lifting drive device for a sewing machine according to claim 6, characterized in that: The outer side of the sealing plate (314) is provided with a connecting plate (32) for connecting the drive unit (3) and the housing (1).

8. A thread-cutting and lifting drive device for a sewing machine according to claim 6 or 7, characterized in that: There are at least two sealing plates (314), which are respectively provided on both sides of the driving member (3). All the sealing plates (314) are provided with a traction member (31) and a shell (33).

9. The thread-cutting and lifting drive device for a sewing machine according to claim 1, characterized in that: The lifting and pressing transmission component (4) includes a connecting shaft (41) disposed on the mounting plate (2) for rotating the lifting and pressing transmission component (4).

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