Sewing machine device of damping type thread trapper
By introducing a damping design into the thread clamp of the sewing machine, the combination of the damper and the thread pressing spring is used to solve the problem of low adjustment accuracy of the thread clamp in the existing sewing machine, the uniformity and stability of the tension force of the sewing thread are achieved, and the risk of disconnection is reduced.
Patent Information
- Application Number
- CN202421873330.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-02
- Publication Date
- 2025-05-02
- Estimated Expiration
- 2034-08-02
AI Technical Summary
The adjustment accuracy of thread clamps in existing sewing machines is not high, resulting in uneven tension of sewing threads, affecting the quality of sewing and possibly causing thread breakage.
The design of a damping wire clamp is adopted. By setting a damper between the loose wire plate and the wire clamping plate, the elastic restoration force of the compressed spring drives the loose wire plate and the damper to move towards the wire clamping assembly, so that the wire clamping assembly clamps the sewing thread.
The clamping force accuracy and stability of the thread clamping device are improved, ensuring the uniformity and stability of the sewing thread tension, reducing the risk of thread breakage, and maintaining the original performance of the thread clamping device.
Smart Images
Figure CN222821843U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of sewing machines and relates to a sewing machine device with a damping type thread clamp. Background Art
[0002] At present, most existing sewing machines are equipped with a thread clamp, which includes two thread clamping plates, which are compressed by a thread release plate and a thread compression spring. When in use, the sewing thread passes through the two thread clamping plates, and the tension and tightness of the sewing thread are adjusted by adjusting the clamping force of the thread clamping plates, so that the sewing machine can work normally.
[0003] The existing thread clamp only adjusts the clamping force of the thread clamping plate by tightening the thread release plate with a thread pressure spring, and the adjustment accuracy is not high. When the sewing machine is working, uneven tension will occur, which affects the sewing quality and may even cause thread breakage and other problems. Utility Model Content
[0004] The utility model aims at the deficiencies of the prior art and provides a sewing machine device with a damping thread clamp, which can improve the clamping force accuracy and stability of the thread clamp in the sewing machine device.
[0005] In order to solve the above technical problems, the purpose of the utility model is achieved through the following technical solutions:
[0006] A sewing machine device with a damping thread clamp comprises a thread clamping screw and a thread taking-up assembly, a thread clamping assembly and a thread loosening assembly which are sequentially sleeved on the thread clamping screw, the thread loosening assembly comprising a thread loosening plate, a thread pressure spring, a thread clamping brake plate and a thread clamping nut, the thread clamping nut is screwed on the front end of the thread clamping screw, the thread clamping brake plate is arranged in the thread clamping nut and fits therewith, the two ends of the thread pressure spring respectively contact with the thread loosening plate and the thread clamping brake plate, the thread clamping screw is sleeved with a damper, the front side of the damper contacts with the thread loosening plate, and the rear side contacts with the thread clamping assembly, the elastic restoring force of the thread pressure spring drives the thread loosening plate and the damper to move in the direction of the thread clamping assembly so that the thread clamping assembly clamps the sewing thread.
[0007] In the above-mentioned sewing machine device with a damping thread clamp, the thread loosening plate, the thread clamping brake plate and the damper are provided with semicircular mounting holes adapted to the two semicircles at the end of the thread clamping screw, and the thread loosening plate, the thread clamping brake plate and the damper are all coaxially arranged with the thread clamping screw; in the utility model, the two semicircles at the end of the thread clamping screw have the same structure as the existing screw end, and are both formed by setting an open groove at the end of the thread clamping screw.
[0008] In the above-mentioned sewing machine device with a damping thread clamp, a spring mounting seat adapted to a thread compression spring is formed on the front side of the thread loosening plate, and a convex ring is formed on the rear side of the thread loosening plate, and the convex ring abuts against the outer edge portion of the front side of the damper; further, the radial dimension of the thread loosening plate is greater than the radial dimension of the damper.
[0009] In the above-mentioned sewing machine device with a damping thread clamp, the thread clamping assembly includes a front thread clamping plate and a rear thread clamping plate, a coaxial boss is formed on the front side of the rear thread clamping plate, and the inner circumference of the front thread clamping plate is adapted to the outer circumference of the boss.
[0010] In the above-mentioned sewing machine device with a damping type thread clamp, the inner circumference of the front thread clamp plate and the outer circumference of the boss have the same radial dimension, and the rear side of the damper simultaneously conflicts with the front side of the front thread clamp plate and the front side of the boss; the radial dimension of the damper is larger than the radial dimension of the boss and smaller than the radial dimension of the front thread clamp plate and the rear thread clamp plate.
[0011] In the above-mentioned sewing machine device with a damping thread clamp, preferably, the front side and the rear side of the damper are both planar structures, and the damper and the thread loosening plate, the front thread clamping plate and the rear thread clamping plate are all surface contact structures.
[0012] In the above-mentioned sewing machine device with a damping thread clamp, the thread taking-up assembly includes a thread taking-up spring, a thread clamp adjustment seat and a thread clamp adjustment seat screw. The thread clamp adjustment seat is sleeved on the rear end of the thread clamp screw, and its front side is in contact with the thread clamp assembly. The thread taking-up spring is sleeved on the thread clamp screw, and its thread taking-up end passes through the circumferential through groove of the thread clamp adjustment seat. The thread clamp adjustment seat screw is threaded into the radial adjustment through hole of the thread clamp adjustment seat, and its end is in contact with the thread clamp screw to lock the thread clamp adjustment seat.
[0013] Compared with the prior art, the utility model has the following beneficial effects:
[0014] 1. The utility model provides a sewing machine device with a damping thread clamp, which improves the accuracy of the force generated by the two thread clamping plates by arranging a damper between the thread loosening plate and the thread clamping plate, thereby improving the accuracy and stability of the sewing thread tensioning force, while also ensuring the original performance of the thread clamp.
[0015] 2. The utility model further improves the structure of the thread clamping assembly, making the tension of the sewing thread softer, and also solves the problem of uneven tension caused by the long radial travel of the sewing thread in the two thread clamping plates due to the low thread passing points of the two thread clamping plates.
[0016] 3. The utility model further improves the coordination between the damping structure and the embedded thread clamping plate structure, so that the damper acts on the front thread clamping plate and the rear thread clamping plate at the same time. The two can produce a synergistic effect, greatly improving the accuracy and stability of the clamping force, and ultimately solving the problem of thread breakage caused by the uneven force of the thread clamp on the sewing thread during the use of the sewing machine. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 It is a three-dimensional diagram of the utility model;
[0018] Figure 2 yes Figure 1 Exploded diagram of
[0019] Figure 3 yes Figure 1 Axial cross-sectional view of
[0020] Figure numerals: 1. Wire clamping screw; 2. Wire loosening plate; 3. Wire pressing spring; 4. Wire clamping brake plate; 5. Wire clamp nut; 6. Damper; 7. Front wire clamping plate; 8. Rear wire clamping plate; 9. Boss; 10. Wire picking spring; 11. Wire clamping adjustment seat; 12. Wire clamping adjustment seat screw. DETAILED DESCRIPTION
[0021] The present invention will be further described below with reference to the accompanying drawings. Figure 1-3 :
[0022] A sewing machine device with a damping thread clamp comprises a thread clamping screw 1 and a thread taking-up assembly, a thread clamping assembly and a thread loosening assembly which are sequentially sleeved on the thread clamping screw 1, the thread loosening assembly comprising a thread loosening plate 2, a thread compression spring 3, a thread clamping brake plate 4 and a thread clamping nut 5, the thread clamping nut 5 is screwed on the front end of the thread clamping screw 1, the thread clamping brake plate is arranged in the thread clamping nut 5 and fits therewith, the two ends of the thread compression spring 3 respectively contact with the thread loosening plate 2 and the thread clamping brake plate 4, the thread clamping screw 1 is sleeved with a damper 6, the front side of the damper 6 contacts with the thread loosening plate 2, and the rear side contacts with the thread clamping assembly, the elastic restoring force of the thread compression spring 3 drives the thread loosening plate 2 and the damper 6 to move in the direction of the thread clamping assembly so that the thread clamping assembly clamps the sewing thread.
[0023] In this embodiment, the wire loosening assembly presses the wire clamping assembly through the damper 6, and the force generated by the wire compression spring 3 on the wire loosening plate 2 is evenly transmitted to the wire clamping assembly after the buffering effect of the damper 6. Compared with the wire loosening plate 2 directly pressing the wire clamping assembly, the damper 6 can make the clamping force more uniform, precise and stable; after adding the damper 6, this embodiment can also ensure the original performance of the wire clamp; the clamping force of the wire clamp can be adjusted through the wire clamp nut 5 to adapt to different sewing requirements, and its adjustment method is also the same as that of the existing wire clamp; when it is necessary to loosen the wire, the damper 6 and the wire loosening plate 2 are pushed by the wire loosening pin, so that both move away from the wire clamping assembly at the same time, the force on the wire clamping assembly disappears, and the wire loosening is completed.
[0024] In this embodiment, the assembly structure of the damper 6 is: the wire loosening plate 2, the wire clamping brake plate 4 and the damper 6 are provided with semicircular mounting holes that are compatible with the two semicircles at the ends of the wire clamping screw 1, and the wire loosening plate 2, the wire clamping brake plate 4 and the damper 6 are all coaxially arranged with the wire clamping screw 1.
[0025] In order to enable the force acting on the wire loosening plate 2 to be transmitted to the damper 6 more stably, a spring mounting seat adapted to the wire compression spring 3 is formed on the front side of the wire loosening plate 2, and a convex ring is formed on the rear side of the wire loosening plate 2, which abuts against the outer edge portion of the front side of the damper 6; further, the radial dimension of the wire loosening plate 2 is greater than the radial dimension of the damper 6.
[0026] This embodiment further improves the structure of the clamping assembly, which includes a front clamping plate 7 and a rear clamping plate 8. A coaxial boss 9 is formed on the front side of the rear clamping plate 8, and the inner circumference of the front clamping plate 7 is matched with the outer circumference of the boss 9. By providing the boss 9, the sewing thread will be located outside the boss 9 when clamping the thread. Therefore, the structure of this embodiment can shorten the radial travel of the sewing thread in the clamping assembly, thereby reducing the risk of uneven radial force of the clamping plate.
[0027] The structure of the wire clamping assembly of this embodiment can be further matched with the damper 6. The inner circumference of the front wire clamping plate 7 and the outer circumference of the boss 9 have the same radial dimension. The rear side of the damper 6 is in conflict with the front side of the front wire clamping plate 7 and the front side of the boss 9 at the same time. The damper 6 acts on the front wire clamping plate 7 and the rear wire clamping plate 8 at the same time, so that a more uniform force can be generated. The radial dimension of the damper 6 is larger than the radial dimension of the boss 9 and smaller than the radial dimension of the front wire clamping plate 7 and the rear wire clamping plate 8.
[0028] Preferably, in order to make the damper 6 better cooperate with the loose wire plate 2, the front clamping plate 7 and the rear clamping plate 8 and transmit the force, the front and rear sides of the damper 6 are both planar structures, and the damper 6 and the loose wire plate 2, the front clamping plate 7 and the rear clamping plate 8 are all surface contact structures.
[0029] The thread taking-up assembly includes a thread taking-up spring 10, a clamping adjustment seat 11 and a clamping adjustment seat screw 12. The clamping adjustment seat 11 is sleeved on the rear end of the clamping screw 1, and its front side contacts the thread taking-up assembly. The thread taking-up spring 10 is sleeved on the clamping screw 1, and its thread taking-up end passes through the circumferential through groove of the clamping adjustment seat 11. The clamping adjustment seat screw 12 is screwed into the radial adjustment through hole of the clamping adjustment seat 11, and its end contacts the clamping screw 1 to lock the clamping adjustment seat 11. When adjustment is required, loosen the clamping adjustment seat screw 12, and after adjustment, re-lock the clamping adjustment seat screw 12. Its adjustment method is the same as that of the existing thread loosener.
[0030] The above embodiments are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.
Claims
1. A sewing machine device with a damping thread clamp, comprising a thread clamp screw (1) and a thread take-up assembly, a thread clamp assembly and a thread loosening assembly which are sequentially mounted on the thread clamp screw (1), the thread loosening assembly comprising a thread loosening plate (2), a thread pressing spring (3), a thread clamp brake plate (4) and a thread clamp nut (5), the thread clamp nut (5) being screwed to the front end of the thread clamp screw (1), the thread clamp brake plate (4) being arranged in the thread clamp nut (5) and fitting therewith, the two ends of the thread pressing spring (3) respectively contact with the thread loosening plate (2) and the thread clamp brake plate (4), characterized in that: The thread clamping screw (1) is provided with a damper (6), the front side of the damper (6) contacts the thread loosening plate (2), and the rear side contacts the thread clamping assembly. The elastic restoring force of the thread pressing spring (3) drives the thread loosening plate (2) and the damper (6) to move in the direction of the thread clamping assembly so that the thread clamping assembly clamps the sewing thread.
2. A sewing machine device with a damping thread tensioner according to claim 1, characterized in that: The wire loosening plate (2), the wire clamping brake plate (4) and the damper (6) are provided with semicircular mounting holes matched with the two semicircles at the ends of the wire clamping screw (1); the wire loosening plate (2), the wire clamping brake plate (4) and the damper (6) are all coaxially arranged with the wire clamping screw (1).
3. A sewing machine device with a damping thread tensioner according to claim 1, characterized in that: The front side of the wire loosening plate (2) is formed with a spring mounting seat adapted to the wire compression spring (3), and the rear side of the wire loosening plate (2) is formed with a convex ring, which abuts against the outer edge of the front side of the damper (6).
4. A sewing machine device with a damping thread tensioner according to claim 1, characterized in that: The wire clamping assembly comprises a front wire clamping plate (7) and a rear wire clamping plate (8); a coaxial boss (9) is formed on the front side of the rear wire clamping plate (8); and the inner circumference of the front wire clamping plate (7) is matched with the outer circumference of the boss (9).
5. A sewing machine device with a damping thread tensioner according to claim 4, characterized in that: The inner circumference of the front clamping plate (7) and the outer circumference of the boss (9) have the same radial dimension, and the rear side of the damper (6) simultaneously contacts the front side of the front clamping plate (7) and the front side of the boss (9).
6. A sewing machine device with a damping thread tensioner according to claim 5, characterized in that: The front side and the rear side of the damper (6) are both planar structures, and the damper (6) and the wire loosening plate (2), the front wire clamping plate (7) and the rear wire clamping plate (8) are all surface contact structures.
7. A sewing machine device with a damping thread tensioner according to claim 1, characterized in that: The thread taking-up assembly comprises a thread taking-up spring (10), a thread clamping adjustment seat (11) and a thread clamping adjustment seat screw (12); the thread clamping adjustment seat (11) is sleeved on the rear end of the thread clamping screw (1), and its front side contacts the thread clamping assembly; the thread taking-up spring (10) is sleeved on the thread clamping screw (1), and its thread taking-up end passes through the circumferential through groove of the thread clamping adjustment seat (11); the thread clamping adjustment seat screw (12) is screwed into the radial adjustment through hole of the thread clamping adjustment seat (11), and its end contacts the thread clamping screw (1) to lock the thread clamping adjustment seat (11).