Threading device for sewing thread

Abstract

The utility model discloses a threading device for sewing threads, which relates to the technical field of threading of sewing machines and comprises a presser foot rod and a needle head, and a rectangular frame is fixedly mounted on the side of the presser foot rod. During use, the sensor senses the position of a pinhole and transmits an electric signal to the indicator light, when the indicator light is turned on, alignment work is finished, then a wire is placed in the wire hooking groove, the second sliding plate, the sliding shaft and the extrusion plate are driven by the operating mechanism to move horizontally, and the extrusion plate extrudes and fixes the wire; and when the extrusion plate moves to the inner wall of the other side part of the thread hooking groove, the threading rod and the first sliding plate are driven to synchronously and horizontally move through the extrusion effect, so that the threading rod penetrates through the needle hole, and threading operation is completed. And after threading operation is completed, the second sliding plate, the sliding shaft and the extrusion plate are driven to reset through the operating mechanism, the thread can be taken down from the thread hooking groove firstly, when the second sliding plate continues to move, the threading rod is driven through the extrusion effect to achieve the reset function, and use is convenient and fast.

Description

Technical Field

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

[0002] A sewing machine is a machine that uses one or more sewing threads to form one or more stitches on the sewing material, so that one or more layers of sewing materials are interwoven or sewn together. Sewing machines can sew fabrics such as cotton, linen, silk, wool, and artificial fibers, as well as products such as leather, plastic, and paper. The stitches are neat, beautiful, flat, and firm, and the sewing speed is fast and easy to use. It has also derived art forms such as hand-push embroidery and computer embroidery. Sewing machines are widely used in industrial production.

[0003] In the prior art, a patent with publication number CN218621368U discloses a precise threading device for a sewing machine, which illuminates it with the light of a laser pen to facilitate the user to put the thread into the thread hooking groove, and cooperates with an adjustment mechanism for fine adjustment, thereby realizing automatic and precise threading of the sewing machine. However, in actual use, since the positions of the needle holes of different models of needles are inconsistent when they are reset, it is not convenient to adjust the height of the threading rod, and the thread hooking groove is prone to loosening during the thread hooking process, and the practicality is low. In view of the above problems, a threading device for sewing thread is proposed. Utility Model Content

[0004] The purpose of the present application is to provide a sewing thread threading device to solve the problems raised in the above-mentioned background technology that the needle hole positions of different models of needles are inconsistent when they are reset, it is inconvenient to adjust the height of the threading rod, and the thread hooking groove is prone to loosening during the thread hooking process, resulting in low practicality.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical solutions: a threading device for sewing thread, comprising a presser foot rod and a needle, a rectangular frame is fixedly installed on the side of the presser foot rod, a lifting block is slidably installed in the rectangular frame through a lifting mechanism, a rectangular cavity is opened in the lifting block, a first slide plate and a second slide plate are slidably installed in the rectangular cavity, a square hole is opened on the side of the rectangular cavity, a threading rod is slidably installed in the square hole, one side of the threading rod is fixedly connected to the side of the first slide plate, a thread hooking groove is opened on the threading rod, a sensor is arranged on the side of the threading rod, an indicator light is arranged on the side of the rectangular frame, the indicator light is electrically connected to the sensor, a circular hole is jointly opened on the side inner wall of the thread hooking groove and the side of the first slide plate, a sliding shaft is slidably installed in the circular hole, one end of the sliding shaft is fixedly connected to the side of the second slide plate, and the other end of the sliding shaft is fixedly installed with an extrusion plate, one side of the second slide plate is provided with an operating mechanism, and the other side of the second slide plate is provided with an elastic mechanism.

[0006] Preferably, the lifting mechanism includes a screw rod, a transmission cavity is opened in the rectangular frame, one end of the screw rod is rotatably mounted on the bottom inner wall of the rectangular frame, the other end of the screw rod is rotatably mounted on the top inner wall of the transmission cavity, the lifting block is threadably mounted on the screw rod, and a control component is provided on the screw rod.

[0007] Preferably, the control component includes a rotating shaft, a rotating hole is opened on the side inner wall of the transmission cavity, the rotating shaft is rotatably installed in the rotating hole, one end of the rotating shaft extends into the transmission cavity and is fixedly sleeved with a first bevel gear, a second bevel gear is fixedly sleeved on the screw, the first bevel gear is meshed with the second bevel gear, and the other end of the rotating shaft extends outside the transmission cavity and is provided with a rotating element.

[0008] Preferably, the rotating element includes a cross connecting block, one end of the cross connecting block is fixedly mounted on the end of the rotating shaft, a circular sliding sleeve is slidably mounted on the cross connecting block, a square plate is rotatably sleeved on the circular sliding sleeve, a return spring is fixedly mounted on the side of the square plate, the other end of the return spring is fixedly mounted on the side of the rectangular frame, and a limiting unit adapted to the square plate is provided in the transmission cavity.

[0009] Preferably, the limiting unit includes a limiting shaft, a limiting hole is opened at the top of the transmission cavity, the limiting shaft is slidably installed in the limiting hole, a top plate is fixedly installed on the top of the limiting shaft, a connecting rod is rotatably installed on the side of the top plate, the other end of the connecting rod is rotatably installed on the top of the square plate, an extrusion spring is sleeved on the limiting shaft, one end of the extrusion spring is fixedly installed on the bottom of the top plate, and the other end of the extrusion spring is fixedly installed on the top of the rectangular frame.

[0010] Preferably, the operating mechanism comprises an operating plate, an operating hole is formed on the inner wall of the side of the rectangular cavity, the operating plate is slidably installed in the operating hole, and the side of the operating plate is fixedly connected to the side of the second slide plate.

[0011] Preferably, the elastic mechanism comprises a tension spring, one end of which is fixedly mounted on a side of the second slide plate, and the other end of which is fixedly mounted on an inner wall of a side of the rectangular cavity.

[0012] In summary, the technical effects and advantages of the utility model are:

[0013] 1. In the utility model, the rectangular frame and the threading rod are moved to a height of eleven by a lifting mechanism, so that the position of the pinhole is sensed by the sensor and an electrical signal is transmitted to the indicator light. When the indicator light is on, the alignment work is completed, and then the wire is placed in the wire hooking groove. The second slide plate, the sliding shaft, and the extrusion plate are driven to move horizontally by the operating mechanism, so that the extrusion plate squeezes and fixes the wire. When the extrusion plate moves to the inner wall of the other side of the wire hooking groove, the threading rod and the first slide plate are driven to move horizontally synchronously by the extrusion effect, so that the threading rod passes through the pinhole and the threading operation is completed. After the threading operation is completed, the second slide plate, the sliding shaft, and the extrusion plate are driven to reset by the operating mechanism, so that the wire can be removed from the wire hooking groove first. When the second slide plate continues to move, the threading rod is driven to reset by the extrusion effect, which is more convenient to use.

[0014] 2. In the utility model, when the rotating shaft needs to be rotated, the circular sleeve is squeezed, and then the top plate and the limit shaft are driven to move upward synchronously under the action of the connecting rod, and then the circular sleeve is rotated to drive the cross connection block and the rotating shaft to rotate synchronously. Since the square plate is rotatably sleeved on the circular sleeve, it will not affect the rotation of the circular sleeve. When the circular sleeve is released, it is reset under the joint action of the reset spring and the extrusion spring, thereby realizing the limiting function of the limit shaft on the rotating shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] 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 or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0016] Figure 1 This is a schematic diagram of the three-dimensional structure of a sewing threading device in an embodiment of the present application;

[0017] Figure 2 This is a schematic diagram of a partial cross-section structure of a rectangular frame and a square plate in an embodiment of the present application;

[0018] Figure 3 for Figure 2 The enlarged structural diagram at A in the middle;

[0019] Figure 4 It is an enlarged schematic diagram of the internal structure of the rectangular frame in the embodiment of the present application.

[0020] In the figure: 1. presser foot rod; 2. needle; 3. rectangular frame; 4. lifting block; 5. screw; 6. rotating shaft; 7. first bevel gear; 8. second bevel gear; 9. cross connecting block; 10. circular sliding sleeve; 11. reset spring; 12. limit shaft; 13. square plate; 14. top plate; 15. connecting rod; 16. extrusion spring; 17. first slide plate; 18. threading rod; 19. hooking groove; 20. sensor; 21. indicator light; 22. second slide plate; 23. sliding shaft; 24. extrusion plate; 25. operation panel; 26. tension spring. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] Example: Reference Figure 1-4 The sewing threading device shown in the figure comprises a presser foot rod 1 and a needle 2. A rectangular frame 3 is fixedly installed on the side of the presser foot rod 1. A lifting block 4 is slidably installed in the rectangular frame 3 through a lifting mechanism. A rectangular cavity is provided in the lifting block 4. A first slide plate 17 and a second slide plate 22 are slidably installed in the rectangular cavity. A square hole is provided on the side of the rectangular cavity. A threading rod 18 is slidably installed in the square hole. One side of the threading rod 18 is fixedly connected to the side of the first slide plate 17. A thread hooking groove 19 is provided on the threading rod 18. A sensor 20 is provided on the side of the wire rod 18, an indicator light 21 is provided on the side of the rectangular frame 3, the indicator light 21 is electrically connected to the sensor 20, a circular hole is provided on the inner wall of the side of the wire hook groove 19 and the side of the first slide plate 17, a sliding shaft 23 is slidably installed in the circular hole, one end of the sliding shaft 23 is fixedly connected to the side of the second slide plate 22, and an extrusion plate 24 is fixedly installed on the other end of the sliding shaft 23, an operating mechanism is provided on one side of the second slide plate 22, and an elastic mechanism is provided on the other side of the second slide plate 22.

[0023] With the above structure, when in use, first, the rectangular frame 3 and the threading rod 18 are driven to move to a height of eleven by the lifting mechanism, so that the position of the pinhole is sensed by the sensor 20, and an electrical signal is transmitted to the indicator light 21. When the indicator light 21 is on, the alignment work is completed, and then the wire is placed in the hooking groove, and the second slide plate 22, the sliding shaft 23, and the extrusion plate 24 are driven to move horizontally by the operating mechanism, so that the extrusion plate 24 squeezes and fixes the wire. When the extrusion plate 24 moves to the inner wall of the other side of the hooking groove 19, the threading rod 18 and the first slide plate 17 are driven to move horizontally synchronously by the extrusion effect, so that the threading rod 18 passes through the pinhole and the threading operation is completed. After the threading operation is completed, the second slide plate 22, the sliding shaft 23, and the extrusion plate 24 are driven to reset by the operating mechanism, so that the wire can be removed from the hooking groove first. When the second slide plate 22 continues to move, the threading rod 18 is driven to reset by the extrusion effect, which is more convenient to use.

[0024] like Figure 3 As shown, the lifting mechanism includes a screw 5, a transmission cavity is opened in the rectangular frame 3, one end of the screw 5 is rotatably installed on the bottom inner wall of the rectangular frame 3, and the other end of the screw 5 is rotatably installed on the top inner wall of the transmission cavity. The lifting block 4 is threadedly installed on the screw 5, and a control component is arranged on the screw 5. The advantage of such arrangement is that the lifting function of driving the lifting block 4 can be realized through the arrangement of the screw 5.

[0025] Specifically, when the height of the threading rod 18 needs to be adjusted, the screw rod 5 is rotated to drive the lifting block 4 to achieve the lifting function under the action of the thread, thereby driving the threading rod 18 to move synchronously.

[0026] like Figure 3 As shown, the control component includes a rotating shaft 6, a rotating hole is opened on the side inner wall of the transmission cavity, and the rotating shaft 6 is rotatably installed in the rotating hole. One end of the rotating shaft 6 extends into the transmission cavity and is fixedly sleeved with a first bevel gear 7. A second bevel gear 8 is fixedly sleeved on the screw 5. The first bevel gear 7 is meshed with the second bevel gear 8. The other end of the rotating shaft 6 extends out of the transmission cavity and is provided with a rotating element. The advantage of such an arrangement is that, through the arrangement of the rotating shaft 6, the first bevel gear 7, and the second bevel gear 8, the screw 5 can be driven to rotate synchronously by rotating the rotating shaft 6.

[0027] Specifically, when the rotating shaft 6 is rotated, the first bevel gear 7 and the second bevel gear 8 are meshed to drive the screw 5 to achieve a synchronous rotation function.

[0028] like Figure 3As shown, the rotating element includes a cross connecting block 9, one end of the cross connecting block 9 is fixedly installed on the end of the rotating shaft 6, a circular sliding sleeve 10 is slidably installed on the cross connecting block 9, a square plate 13 is rotatably sleeved on the circular sliding sleeve 10, a return spring 11 is fixedly installed on the side of the square plate 13, the other end of the return spring 11 is fixedly installed on the side of the rectangular frame 3, and a limiting unit compatible with the square plate 13 is arranged in the transmission cavity. The advantage of such an arrangement is that, through the arrangement of the circular sliding sleeve 10, the rotating shaft 6 can realize a convenient rotation function.

[0029] Specifically, the circular sleeve 10 is rotated, and then the rotating shaft 6 is driven by the connecting action of the cross connecting block 9 to realize the synchronous rotation function.

[0030] like Figure 3 As shown, the limit unit includes a limit shaft 12, a limit hole is opened on the top of the transmission cavity, the limit shaft 12 is slidably installed in the limit hole, a top plate 14 is fixedly installed on the top of the limit shaft 12, a connecting rod 15 is rotatably installed on the side of the top plate 14, and the other end of the connecting rod 15 is rotatably installed on the top of the square plate 13, and an extrusion spring 16 is sleeved on the limit shaft 12, one end of the extrusion spring 16 is fixedly installed on the bottom of the top plate 14, and the other end of the extrusion spring 16 is fixedly installed on the top of the rectangular frame 3. The advantage of such a setting is that, through the setting of the limit shaft 12, the extrusion limit function can be realized on it without rotating the rotating shaft 6.

[0031] Specifically, when the rotating shaft 6 needs to be rotated, the circular sleeve 10 is squeezed, and then the top plate 14 and the limit shaft 12 are driven to move upward synchronously under the action of the connecting rod 15, and then the circular sleeve 10 is rotated to drive the cross connection block 9 and the rotating shaft 6 to rotate synchronously. Since the square plate 13 is rotatably sleeved on the circular sleeve 10, it will not affect the rotation of the circular sleeve 10. When the circular sleeve 10 is released, it is reset under the joint action of the reset spring 11 and the extrusion spring 16, thereby realizing the limiting function of the limit shaft 12 on the rotating shaft 6.

[0032] like Figure 4 As shown, the operating mechanism includes an operating plate 25, and an operating hole is opened on the inner wall of the side of the rectangular cavity. The operating plate 25 is slidably installed in the operating hole, and the side of the operating plate 25 is fixedly connected to the side of the second slide plate 22. The advantage of this arrangement is that through the arrangement of the operating plate 25, the second slide plate 22 can be driven to realize a convenient sliding function.

[0033] Specifically, when the second slide plate 22 needs to be slid, it can be achieved by sliding the operating plate 25, which is simple and convenient to operate.

[0034] like Figure 4As shown, the elastic mechanism includes a tension spring 26, one end of which is fixedly mounted on the side of the second slide plate 22, and the other end of the tension spring 26 is fixedly mounted on the side inner wall of the rectangular cavity. The advantage of this arrangement is that, through the arrangement of the tension spring 26, when the limit on the second slide plate 22 is released, it can be driven by its elastic action to realize the reset function.

[0035] Specifically, when the limit on the second slide plate 22 is released, the elastic effect of the tension spring 26 can drive it to achieve a reset function, and the reset is fast, stable, and highly practical.

[0036] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A sewing threading device, comprising a presser foot bar (1) and a needle (2), characterized in that: A rectangular frame (3) is fixedly installed on the side of the presser foot rod (1), a lifting block (4) is slidably installed in the rectangular frame (3) through a lifting mechanism, a rectangular cavity is provided in the lifting block (4), a first slide plate (17) and a second slide plate (22) are slidably installed in the rectangular cavity, a square hole is provided on the side of the rectangular cavity, a threading rod (18) is slidably installed in the square hole, one side of the threading rod (18) is fixedly connected to the side of the first slide plate (17), a thread hooking groove (19) is provided on the threading rod (18), and a sensor (22) is provided on the side of the threading rod (18). 0), an indicator light (21) is provided on the side of the rectangular frame (3), the indicator light (21) is electrically connected to the sensor (20), a circular hole is provided on the inner wall of the side of the hook wire groove (19) and the side of the first slide plate (17), a sliding shaft (23) is slidably installed in the circular hole, one end of the sliding shaft (23) is fixedly connected to the side of the second slide plate (22), and an extrusion plate (24) is fixedly installed on the other end of the sliding shaft (23), an operating mechanism is provided on one side of the second slide plate (22), and an elastic mechanism is provided on the other side of the second slide plate (22).

2. A sewing threading device according to claim 1, characterized in that: The lifting mechanism comprises a screw rod (5), a transmission cavity is provided in the rectangular frame (3), one end of the screw rod (5) is rotatably mounted on the bottom inner wall of the rectangular frame (3), and the other end of the screw rod (5) is rotatably mounted on the top inner wall of the transmission cavity. The lifting block (4) is threadedly mounted on the screw rod (5), and a control component is provided on the screw rod (5).

3. A sewing threading device according to claim 2, characterized in that: The control assembly comprises a rotating shaft (6), a rotating hole is formed on the inner wall of the side of the transmission cavity, the rotating shaft (6) is rotatably mounted in the rotating hole, one end of the rotating shaft (6) extends into the transmission cavity and is fixedly sleeved with a first bevel gear (7), a second bevel gear (8) is fixedly sleeved on the screw rod (5), the first bevel gear (7) is meshed with the second bevel gear (8), and the other end of the rotating shaft (6) extends outside the transmission cavity and is provided with a rotating element.

4. A sewing threading device according to claim 3, characterized in that: The rotating element comprises a cross connection block (9), one end of the cross connection block (9) is fixedly mounted on the end of the rotating shaft (6), a circular sliding sleeve (10) is slidably mounted on the cross connection block (9), a square plate (13) is rotatably sleeved on the circular sliding sleeve (10), a return spring (11) is fixedly mounted on the side of the square plate (13), the other end of the return spring (11) is fixedly mounted on the side of the rectangular frame (3), and a limit unit matched with the square plate (13) is arranged in the transmission cavity.

5. A sewing threading device according to claim 4, characterized in that: The limiting unit comprises a limiting shaft (12), a limiting hole is provided at the top of the transmission cavity, the limiting shaft (12) is slidably mounted in the limiting hole, a top plate (14) is fixedly mounted on the top of the limiting shaft (12), a connecting rod (15) is rotatably mounted on the side of the top plate (14), the other end of the connecting rod (15) is rotatably mounted on the top of the square plate (13), an extrusion spring (16) is sleeved on the limiting shaft (12), one end of the extrusion spring (16) is fixedly mounted on the bottom of the top plate (14), and the other end of the extrusion spring (16) is fixedly mounted on the top of the rectangular frame (3).

6. A sewing threading device according to claim 1, characterized in that: The operating mechanism comprises an operating plate (25), an operating hole is provided on the inner wall of the side of the rectangular cavity, the operating plate (25) is slidably mounted in the operating hole, and the side of the operating plate (25) is fixedly connected to the side of the second slide plate (22).

7. A sewing threading device according to claim 1, characterized in that: The elastic mechanism comprises a tension spring (26), one end of the tension spring (26) being fixedly mounted on the side of the second slide plate (22), and the other end of the tension spring (26) being fixedly mounted on the inner wall of the side of the rectangular cavity.

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