Thread clamping device of sewing machine

Abstract

The utility model is suitable for the field of sewing machines, and provides a thread clamping device of a sewing machine, which comprises a mounting rod, a thread clamping unit movably arranged on the outer side of a fixing rod, a rotating unit and a pressing unit, a wire clamping block and a wire penetrating groove are meshed with each other to form a circular hole for wire penetrating, a wire can be prevented from being damaged by extrusion and friction of an upper clamping plate and a lower clamping plate on the two sides in cooperation with a wire penetrating hole formed in a wire guiding plate, and the upper clamping plate and the lower clamping plate can rotate through a first rotating piece and a second rotating piece; and a proper angle can be automatically adjusted according to a working state.

Description

Technical Field

[0001] The utility model belongs to the field of sewing machines, and particularly relates to a thread clamping device for a sewing machine. Background Art

[0002] The thread clamping device is very important in a sewing machine. By fixing and guiding the thread end, it simplifies the processing flow, improves efficiency and convenience. Through effective management of the thread end, sewing problems are reduced, which helps to improve the efficiency and stability of the sewing process.

[0003] The current thread clamping device usually uses a spring to squeeze a clamping piece to clamp the thread end. However, during the sewing process, when the sewing machine drags the thread end, the thread end rubs against the clamping piece, which may damage the fibers inside the thread, resulting in a weakened strength of the overall thread, and thus affecting the sewing quality. Summary of the Utility Model

[0004] The purpose of the embodiment of the utility model is to provide a thread clamping device for a sewing machine, aiming to solve the problems put forward in the background art.

[0005] The embodiment of the utility model is implemented as follows. A thread clamping device for a sewing machine includes a mounting rod, and a fixing rod is fixedly arranged at the upper end of the mounting rod. The thread clamping device further includes:

[0006] A thread clamping unit, the thread clamping unit includes an upper clamping plate movably arranged outside the fixing rod, a lower clamping plate is movably arranged below the upper clamping plate, a plurality of groups of teeth are arranged on the outer side of the lower end of the upper clamping plate, a plurality of groups of slots adapted to the teeth are arranged at the positions corresponding to the teeth on the outer side of the upper end of the lower clamping plate, lead plates for leading the thread are arranged on both sides of the lower clamping plate, a threading hole is fixedly arranged in the lead plate, a threading groove is fixedly arranged at the position corresponding to the threading hole at the upper end of the lower clamping plate, and a thread clamping block is fixedly arranged at the position corresponding to the threading groove at the lower end of the upper clamping plate;

[0007] A rotating unit, the rotating unit includes a first rotating part movably arranged above the upper clamping plate and two groups of second rotating parts movably arranged below the lower clamping plate, a plurality of groups of ball bearings are movably arranged in the first rotating part and the second rotating parts, and a cage is movably arranged inside the ball bearings;

[0008] A pressing unit, the pressing unit includes a spring movably arranged above the first rotating part, a washer is movably arranged above the spring, a nut is arranged above the washer, threads are arranged inside the nut, and an external thread adapted to the internal thread of the nut is arranged at the upper end of the fixing rod corresponding to the nut.

[0009] As a further scheme of the utility model: the thread clamping block is arranged in a block structure with a circular groove at the bottom, and the threading groove is arranged in a groove structure with a circular groove at the bottom.

[0010] As a further solution of the present utility model: a first sleeve is further fixedly arranged in the middle of the lower end of the upper clamping plate. The first sleeve is arranged in a tubular structure. The inner diameter of the first sleeve is larger than the outer diameter of the fixing rod. A second sleeve is further fixedly arranged in the middle of the upper end of the lower clamping plate. The second sleeve is arranged in a tubular structure. The inner diameter of the first sleeve is larger than the outer diameter of the first sleeve. The second sleeve is movably sleeved outside the first sleeve.

[0011] As a further solution of the present utility model: first baffles are fixedly arranged on both sides of the first rotating part and the second rotating part. Second baffles are fixedly arranged on one side of the upper end of the upper clamping plate and the lower end of the lower clamping plate corresponding to the positions of the first baffles. The first baffles and the second baffles are both arranged in a plate-like structure.

[0012] As a further solution of the present utility model: ball grooves adapted to the balls are fixedly arranged at the positions corresponding to the balls above the upper clamping plate and below the lower clamping plate.

[0013] A thread clamping device for a sewing machine provided by an embodiment of the present utility model forms a circular hole for threading through the mutual engagement of the provided thread clamping block and the thread passing groove. Cooperating with the thread passing holes arranged on the lead plate, it can avoid the extrusion friction damage of the thread by the upper clamping plate and the lower clamping plate on both sides. Through the provided first rotating part and the second rotating part, the upper clamping plate and the lower clamping plate can rotate, facilitating automatic adjustment to a suitable angle according to the working state. Description of the Drawings

[0014] Figure 1 is a three-dimensional structure diagram of a thread clamping device for a sewing machine provided by an embodiment of the present utility model;

[0015] Figure 2 is a sectional view of a thread clamping device for a sewing machine provided by an embodiment of the present utility model;

[0016] Figure 3 is Figure 2 an enlarged schematic view of part A in

[0017] In the drawings: mounting rod 1, fixing rod 2, thread clamping unit 3, upper clamping plate 4, teeth 41, thread clamping block 42, first sleeve 43, lower clamping plate 5, slot 51, thread passing groove 52, second sleeve 53, lead plate 6, thread passing hole 61, rotating unit 7, first rotating part 71, second rotating part 72, first baffle 8, second baffle 81, ball 9, ball groove 91, cage 10, pressing unit 11, spring 12, washer 13, nut 14. Detailed Embodiment

[0018] In order to make the objectives, technical solutions and advantages of the present utility model more clear and understandable, the present utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0019] The following describes in detail the specific implementation of the present utility model in conjunction with specific embodiments.

[0020] As Figures 1 to 3 shown, a thread clamping device for a sewing machine provided by an embodiment of the present utility model includes a mounting rod 1, a fixed rod 2 is fixedly arranged at the upper end of the mounting rod 1, and further includes:

[0021] A thread clamping unit 3, the thread clamping unit 3 includes an upper clamping plate 4 movably arranged outside the fixed rod 2, a lower clamping plate 5 is movably arranged below the upper clamping plate 4, a plurality of sets of teeth 41 are arranged outside the lower end of the upper clamping plate 4, and a plurality of sets of card slots 51 adapted to the teeth 41 are arranged at the corresponding positions of the outer side of the upper end of the lower clamping plate 5. Lead plates 6 for leading the thread are also arranged on both sides of the lower clamping plate 5. A threading hole 61 is fixedly arranged in the lead plate 6. A threading groove 52 is fixedly arranged at the corresponding position of the upper end of the lower clamping plate 5 corresponding to the threading hole 61. A thread clamping block 42 is fixedly arranged at the corresponding position of the lower end of the upper clamping plate 4 corresponding to the threading groove 52;

[0022] A rotating unit 7, the rotating unit 7 includes a first rotating member 71 movably arranged above the upper clamping plate 4 and two sets of second rotating members 72 movably arranged below the lower clamping plate 5. A plurality of sets of balls 9 are movably arranged in the first rotating member 71 and the second rotating member 72. A cage 10 is movably arranged inside the balls 9;

[0023] A pressing unit 11, the pressing unit 11 includes a spring 12 movably arranged above the first rotating member 71, a washer 13 is movably arranged above the spring 12, a nut 14 is arranged above the washer 13, threads are arranged in the nut 14, and an external thread adapted to the internal thread in the nut 14 is arranged at the upper end of the fixed rod 2 corresponding to the nut 14.

[0024] In an embodiment of the present utility model, a circular hole for threading is formed by the mutual engagement of the thread clamping block 42 and the threading groove 52. Cooperating with the threading hole 61 arranged on the lead plate 6, the thread can be prevented from being damaged by extrusion and friction between the upper clamping plate 4 and the lower clamping plate 5 on both sides. By arranging the first rotating member 71 and the second rotating member 72, the upper clamping plate 4 and the lower clamping plate 5 can rotate, facilitating automatic adjustment to a suitable angle according to the working state.

[0025] In an example of the present utility model, during use, pass the thread through the threading hole 61 on one side, lift the upper clamping plate 4, then pass the thread through the threading groove 52, lower the upper clamping plate 4, and the locking teeth 41 engage with the locking groove 51, and the wire clamping block 42 engages with the threading groove 52, and under the action of the spring 12, the upper clamping plate 4 and the lower clamping plate 5 are pressed tightly. Finally, pass the thread through the threading hole 61 on the other side and connect it to the sewing machine line system. When the sewing machine takes the thread, if the angle of the wire clamping unit 3 is inappropriate, at this time the thread will pull the threading hole 61, so that the wire clamping unit 3 rotates to a suitable position under the action of the rotating unit 7.

[0026] As Figure 2 and Figure 3 shown, as a preferred embodiment of the present utility model, the wire clamping block 42 is arranged as a block structure with a circular groove at the bottom, and the threading groove 52 is arranged as a groove structure with a circular groove at the bottom.

[0027] Furthermore, a first sleeve 43 is fixedly arranged in the middle of the lower end of the upper clamping plate 4. The first sleeve 43 is arranged as a tubular structure, the inner diameter of the first sleeve 43 is larger than the outer diameter of the fixed rod 2, a second sleeve 53 is fixedly arranged in the middle of the upper end of the lower clamping plate 5, the second sleeve 53 is arranged as a tubular structure, the inner diameter of the first sleeve 43 is larger than the outer diameter of the first sleeve 43, and the second sleeve 53 is movably sleeved outside the first sleeve 43.

[0028] In an example of the present utility model, by arranging the wire clamping block 42 and the threading groove 52 to engage with each other to form a circular hole for threading, and cooperating with the arranged second sleeve 53, it is possible to prevent the thread inside the lower clamping plate 5 from being wound around the fixed rod 2 when the lower clamping plate 5 rotates.

[0029] As Figure 2 shown, as a preferred embodiment of the present utility model, first baffles 8 are fixedly arranged on both sides of the first rotating member 71 and the second rotating member 72, and second baffles 81 are fixedly arranged on one side corresponding to the position of the first baffles 8 at the upper end of the upper clamping plate 4 and the lower end of the lower clamping plate 5. The first baffles 8 and the second baffles 81 are both arranged as plate-like structures.

[0030] In an example of the present utility model, by arranging the first baffles 8 and the second baffles 81, the rotation angle of the upper clamping plate 4 and the lower clamping plate 5 can be limited within 180 degrees to avoid winding of the thread inside the device.

[0031] As Figure 2 shown, as a preferred embodiment of the present utility model, ball grooves 91 adapted to the balls 9 are fixedly arranged at the positions corresponding to the balls 9 above the upper clamping plate 4 and below the lower clamping plate 5.

[0032] In an example of the present utility model, by providing the ball groove 91, the position of the ball 9 can be restricted, facilitating the control of the rotation of the upper clamping plate 4 and the lower clamping plate 5.

[0033] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-described exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present invention. Any reference signs in the claims should not be construed as limiting the claims involved.

[0034] It should be noted that, without conflict, the embodiments in the present utility model and the features in the embodiments can be combined with each other.

[0035] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, the meaning of "a plurality" is two or more.

[0036] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "mounted", "connected", "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood through specific circumstances.

[0037] In addition, it should be understood that although this specification is described in terms of embodiments, not every embodiment contains only an independent technical solution. This narrative manner of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A thread clamping device for a sewing machine, comprising a mounting rod (1), wherein a fixing rod (2) is fixedly arranged at the upper end of the mounting rod (1), and is characterized in that, Also included are: A wire clamping unit (3), the wire clamping unit (3) includes an upper clamping plate (4) movably arranged outside the fixed rod (2), a lower clamping plate (5) is movably arranged below the upper clamping plate (4), a plurality of groups of teeth (41) are arranged on the outer side of the lower end of the upper clamping plate (4), and a plurality of groups of grooves (51) adapted to the teeth (41) are arranged at the positions corresponding to the teeth (41) on the outer side of the upper end of the lower clamping plate (5). Lead plates (6) for leading wires are further arranged on both sides of the lower clamping plate (5), a wire passing hole (61) is fixedly arranged in the lead plate (6), a wire passing groove (52) is fixedly arranged at the position corresponding to the wire passing hole (61) on the upper end of the lower clamping plate (5), and a wire clamping block (42) is fixedly arranged at the position corresponding to the wire passing groove (52) on the lower end of the upper clamping plate (4); A rotating unit (7), the rotating unit (7) includes a first rotating part (71) movably arranged above the upper clamping plate (4) and two groups of second rotating parts (72) below the lower clamping plate (5), a plurality of groups of balls (9) are movably arranged in the first rotating part (71) and the second rotating part (72), and a cage (10) is movably arranged inside the balls (9); A pressing unit (11), the pressing unit (11) includes a spring (12) movably arranged above the first rotating part (71), a washer (13) is movably arranged above the spring (12), a nut (14) is arranged above the washer (13), a thread is arranged in the nut (14), and an external thread adapted to the internal thread of the nut (14) is arranged at the upper end of the fixed rod (2) corresponding to the nut (14).

2. The thread clamping device of a sewing machine according to claim 1, characterized in that The wire clamping block (42) is arranged as a block structure with a circular groove at the bottom, and the wire passing groove (52) is arranged as a groove structure with a circular groove at the bottom.

3. The thread clamping device of a sewing machine according to claim 2, characterized in that, A first sleeve (43) is further fixedly arranged in the middle of the lower end of the upper clamping plate (4), the first sleeve (43) is arranged as a tubular structure, the inner diameter of the first sleeve (43) is larger than the outer diameter of the fixed rod (2), a second sleeve (53) is fixedly arranged in the middle of the upper end of the lower clamping plate (5), the second sleeve (53) is arranged as a tubular structure, the inner diameter of the first sleeve (43) is larger than the outer diameter of the first sleeve (43), and the second sleeve (53) is movably sleeved outside the first sleeve (43).

4. A thread clamping device for a sewing machine according to claim 3, characterized in that, First baffles (8) are fixedly arranged on both sides of the first rotating part (71) and the second rotating part (72), and second baffles (81) are fixedly arranged on one side of the upper end of the upper clamping plate (4) and the lower end of the lower clamping plate (5) corresponding to the positions of the first baffles (8). The first baffles (8) and the second baffles (81) are both arranged as plate-like structures.

5. A thread clamping device for a sewing machine according to claim 4, characterized in that, Ball grooves (91) adapted to the balls (9) are fixedly arranged at the positions corresponding to the balls (9) above the upper clamping plate (4) and below the lower clamping plate (5).

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