Thread loosening device for sewing machine

Abstract

The utility model discloses a thread loosening device for a sewing machine, which relates to the technical field of sewing machines and comprises a bottom plate, a support plate fixedly arranged at the top of the bottom plate, a transverse plate fixedly arranged at the upper end of the support plate, a fixing plate fixedly arranged on the outer wall of the transverse plate, a push rod slidably arranged in the fixing plate in a penetrating manner, and a thread trapper fixedly arranged at the end of the push rod. The rod wall of the push rod is sleeved with a first spring, the two ends of the first spring are fixedly connected with the fixed plate and the push rod correspondingly, a first supporting rod is fixedly arranged at the middle end of the outer wall of the supporting plate, the rod wall of the first supporting rod is rotationally sleeved with a push plate, and a movable plate is arranged between the push plate and the push rod; and a thread loosening pushing mechanism is arranged between the vertical plate and the movable plate. According to the bottom plate, the supporting plate, the transverse plate, the vertical plate, the first supporting rod, the push plate, the thread clamping device, the push rod, the movable plate and the pushing thread feeding mechanism, thread loosening can be adjusted to different degrees only through single-time control, and the operation convenience of the thread loosening device in the sewing machine is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of sewing machines, in particular to a thread loosening device for sewing machines. Background Art

[0002] Providing a thread feeding device inside the sewing machine can achieve fast, accurate and stable relaxation and tensioning of the thread during the sewing process, thereby improving sewing efficiency and quality.

[0003] After searching, the patent number CN208309115U discloses a thread loosening device for a sewing machine. The screw of the device drives the mounting plate to move left and right, adjusts the length of the rotating lever swinging to the right, and indirectly adjusts the distance the thread loosening rod moves to the right, thereby realizing the adjustment of different degrees of thread loosening. The device has a simple structure and occupies little space.

[0004] However, during use, the above device requires multiple operations of electric control and manual control to complete different degrees of adjustment of wire feeding, which reduces the convenience of operation of the wire feeding device. Utility Model Content

[0005] In view of the above problems existing in the existing thread loosening device for sewing machines, the present utility model is proposed.

[0006] Therefore, the purpose of the utility model is to provide a thread loosening device for a sewing machine, which solves the problem that multiple operations of electric control and manual control are required to complete different degrees of adjustment of thread feeding during the use of the sewing machine.

[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0008] A thread loosening device for a sewing machine, comprising a bottom plate, a support plate fixedly arranged on the top of the bottom plate, a transverse plate fixedly arranged on the upper end of the support plate, a fixing plate fixedly arranged on the outer wall of the transverse plate, a push rod slidably penetrated inside the fixing plate, a thread clamp fixedly arranged on the end of the push rod, a first spring sleeved on the rod wall of the push rod, and two ends of the first spring fixedly connected to the fixing plate and the push rod respectively;

[0009] A first support rod is fixedly disposed at the middle end of the outer wall of the support plate, a push plate is rotatably sleeved on the rod wall of the first support rod, and a movable plate is disposed between the push plate and the push rod;

[0010] A vertical plate is fixedly arranged on the top of the bottom plate, and a wire-releasing mechanism is arranged between the vertical plate and the movable plate.

[0011] Preferably, the wire-releasing mechanism includes a second support rod, the second support rod is fixedly connected to the vertical plate, and an adjusting plate is rotatably sleeved on the outer side, the lower ends of the adjusting plate and the push plate are respectively provided with a first sliding hole and a second sliding hole, the outer wall of the support plate is provided with a guide groove, a sliding plate is slidably penetrated inside the guide groove, and the first sliding rod and the second sliding rod are respectively fixedly provided with the first sliding rod and the second sliding rod at both ends of the outer wall of the sliding plate, and the first sliding rod and the second sliding rod are respectively slidably arranged in the first sliding hole and the second sliding hole.

[0012] Preferably, a guide hole is opened inside the movable plate, a guide block is slidably penetrated through the inner wall of the guide hole, and the guide block is fixedly connected to the transverse plate.

[0013] Preferably, the rod wall fixing sleeve of the second support rod is provided with a limit gear, the upper end of the outer wall of the adjusting plate is fixedly provided with a sleeve, a limit rod is slidably passed through the interior of the sleeve, the end of the limit rod is inserted into the tooth groove of the limit gear, the rod wall fixing sleeve of the limit rod is provided with a top plate, the rod wall sleeve of the limit rod is provided with a second spring, and the two ends of the second spring are respectively fixedly connected to the top plate and the sleeve.

[0014] Furthermore, the cross section of the guide block is T-shaped.

[0015] Preferably, the second sliding rod passes through the guide groove and extends to the outside.

[0016] In the above technical solution, the technical effects and advantages provided by the utility model are:

[0017] 1. The utility model, through the bottom plate, support plate, horizontal plate, vertical plate, first support rod, push plate, thread clamp, push rod, movable plate and thread pushing and feeding mechanism, can adjust the thread loosening to different degrees by a single operation, thereby improving the convenience of operation of the thread loosening device inside the sewing machine.

[0018] 2. The utility model can accurately and stably control the degree of line loosening through the second support rod, limit gear, adjustment plate, sleeve, limit rod, top plate and second spring, thereby improving the operating accuracy of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0020] Figure 1 It is a schematic diagram of the structure of the utility model;

[0021] Figure 2For the utility model Figure 1 A magnified schematic diagram of part A;

[0022] Figure 3 It is a side structural schematic diagram of the support plate and the slide plate of the utility model.

[0023] Description of reference numerals:

[0024] 1. Bottom plate; 2. Support plate; 3. Horizontal plate; 4. Fixed plate; 5. Push rod; 6. Wire clamp; 7. First spring; 8. First support rod; 9. Push plate; 10. Moving plate; 11. Vertical plate; 12. Second support rod; 13. Adjusting plate; 14. Slide plate; 15. First slide bar; 16. Second slide bar; 17. Guide block; 18. Limiting gear; 19. Sleeve; 20. Limiting rod; 21. Top plate; 22. Second spring. DETAILED DESCRIPTION

[0025] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0026] The utility model embodiment discloses a thread loosening device for a sewing machine.

[0027] The utility model provides Figure 1-3 A thread loosening device for a sewing machine shown in the figure comprises a bottom plate 1, a support plate 2 is fixedly arranged on the top of the bottom plate 1, a transverse plate 3 is fixedly arranged on the upper end of the support plate 2, a fixing plate 4 is fixedly arranged on the outer wall of the transverse plate 3, a push rod 5 is slidably penetrated inside the fixing plate 4, a thread clamp 6 is fixedly arranged on the end of the push rod 5, a first spring 7 is sleeved on the rod wall of the push rod 5, and both ends of the first spring 7 are fixedly connected to the fixing plate 4 and the push rod 5 respectively;

[0028] A first support rod 8 is fixedly provided at the middle end of the outer wall of the support plate 2, a push plate 9 is rotatably sleeved on the rod wall of the first support rod 8, a movable plate 10 is provided between the push plate 9 and the push rod 5, a guide hole is opened inside the movable plate 10, a guide block 17 is slidably penetrated through the inner wall of the guide hole, the cross section of the guide block 17 is T-shaped, and the guide block 17 is fixedly connected to the cross plate 3.

[0029] When the sewing machine is in use, the push plate 9 is rotated under the support of the first support rod 8. At this time, the push plate 9 pushes the movable plate 10. Under the sliding cooperation of the guide block 17 and the guide hole, the guide block 17 is pushed to squeeze the push rod 5, so that the push rod 5 pushes the thread clamp 6, so that the thread clamp 6 loosens the yarn. When the rotation angle of the push plate 9 is adjusted, the thread clamp 6 can be pushed to different degrees, thereby completing different degrees of thread loosening.

[0030] In order to be able to rotate the push plate 9 to complete the wire feeding work, Figure 1-3 As shown, a vertical plate 11 is fixedly provided on the top of the base plate 1, and a wire-releasing mechanism is provided between the vertical plate 11 and the movable plate 10, and the wire-releasing mechanism includes a second support rod 12, the second support rod 12 is fixedly connected to the vertical plate 11, and an adjusting plate 13 is rotatably sleeved on the outer side, a first sliding hole and a second sliding hole are respectively provided at the lower ends of the adjusting plate 13 and the push plate 9, a guide groove is provided on the outer wall of the support plate 2, a slide plate 14 is slidably penetrated inside the guide groove, a first slide bar 15 and a second slide bar 16 are respectively fixedly provided at both ends of the outer wall of the slide bar 14, the first slide bar 15 and the second slide bar 16 are respectively slidably disposed in the first sliding hole and the second sliding hole, and the second slide bar 16 passes through the guide groove and extends to the outside.

[0031] When it is necessary to drive the push plate 9 to rotate, the adjustment plate 13 is pushed through the support of the second support rod 12. At this time, when the adjustment plate 13 rotates, the sliding plate 14 can be pushed through the sliding cooperation between the first slide bar 15 and the first slide hole, so that the slide plate 14 moves in the guide groove. While the slide plate 14 moves, the push plate 9 can be pushed through the sliding cooperation between the second slide bar 16 and the second slide hole, so that the push plate 9 rotates under the support of the first support rod 8. At this time, the wire clamp 6 can be pushed to complete the wire loosening work.

[0032] In order to adjust the rotation angle of the push plate 9 and complete different degrees of loosening work, such as Figure 1-2 As shown, the rod wall of the second support rod 12 is fixedly sleeved with a limit gear 18, the upper end of the outer wall of the adjustment plate 13 is fixedly provided with a sleeve 19, a limit rod 20 is slidably passed through the inside of the sleeve 19, the end of the limit rod 20 is inserted into the tooth groove of the limit gear 18, the rod wall of the limit rod 20 is fixedly sleeved with a top plate 21, the rod wall of the limit rod 20 is sleeved with a second spring 22, and the two ends of the second spring 22 are respectively fixedly connected to the top plate 21 and the sleeve 19.

[0033] Before pushing the adjusting plate 13, push the top plate 21 so that the top plate 21 drives the limiting rod 20 to be pulled out from the tooth groove of the limiting gear 18 and squeezes the second spring 22. After the adjusting plate 13 rotates and completes the pushing of the push plate 9, release the top plate 21. Under the elastic force recovery of the second spring 22, the limiting rod 20 rebounds quickly and is inserted into the tooth groove of the limiting gear 18 again, and the position of the adjusting plate 13 is fixed. At this time, the position of the push plate 9 is determined, and the loose thread position can be fixed, so that the yarn can be transmitted stably.

[0034] The above only describes some exemplary embodiments of the present invention by way of illustration. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A thread loosening device for a sewing machine, comprising a bottom plate (1), characterized in that: A support plate (2) is fixedly provided on the top of the bottom plate (1), a transverse plate (3) is fixedly provided on the upper end of the support plate (2), a fixing plate (4) is fixedly provided on the outer wall of the transverse plate (3), a push rod (5) is slidably penetrated inside the fixing plate (4), a wire clamp (6) is fixedly provided on the end of the push rod (5), a first spring (7) is sleeved on the rod wall of the push rod (5), and two ends of the first spring (7) are fixedly connected to the fixing plate (4) and the push rod (5) respectively; A first support rod (8) is fixedly provided at the middle end of the outer wall of the support plate (2), a push plate (9) is rotatably sleeved on the rod wall of the first support rod (8), and a movable plate (10) is provided between the push plate (9) and the push rod (5); A vertical plate (11) is fixedly provided on the top of the bottom plate (1), and a wire-releasing mechanism is provided between the vertical plate (11) and the movable plate (10).

2. The thread loosening device for a sewing machine according to claim 1, characterized in that: The wire-releasing mechanism comprises a second support rod (12), the second support rod (12) is fixedly connected to the vertical plate (11), and an adjusting plate (13) is rotatably sleeved on the outer side, the lower ends of the adjusting plate (13) and the push plate (9) are respectively provided with a first sliding hole and a second sliding hole, the outer wall of the support plate (2) is provided with a guide groove, a slide plate (14) is slidably penetrated inside the guide groove, and a first sliding rod (15) and a second sliding rod (16) are respectively fixedly provided at both ends of the outer wall of the slide plate (14), and the first sliding rod (15) and the second sliding rod (16) are respectively slidably arranged in the first sliding hole and the second sliding hole.

3. The thread loosening device for a sewing machine according to claim 1, characterized in that: A guide hole is provided inside the movable plate (10), a guide block (17) is slidably penetrated through the inner wall of the guide hole, and the guide block (17) is fixedly connected to the transverse plate (3).

4. The thread loosening device for a sewing machine according to claim 2, characterized in that: The rod wall of the second support rod (12) is fixedly sleeved with a limit gear (18); the upper end of the outer wall of the adjustment plate (13) is fixedly sleeved with a sleeve (19); a limit rod (20) is slidably penetrated inside the sleeve (19); the end of the limit rod (20) is inserted into the tooth groove of the limit gear (18); the rod wall of the limit rod (20) is fixedly sleeved with a top plate (21); the rod wall of the limit rod (20) is sleeved with a second spring (22); and the two ends of the second spring (22) are respectively fixedly connected to the top plate (21) and the sleeve (19).

5. The thread loosening device for a sewing machine according to claim 3, characterized in that: The cross section of the guide block (17) is T-shaped.

6. The thread loosening device for a sewing machine according to claim 2, characterized in that: The second sliding rod (16) passes through the guide groove and extends to the outside.

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