Take-up device of sewing machine

Abstract

The utility model discloses a take-up device of a sewing machine, which comprises a machine head, a take-up device is arranged on the machine head, the take-up device comprises a mounting frame, a motor, a rotating frame and a thread trapper, the mounting frame is fixed on the machine head, the motor is mounted on the mounting frame, and a motor shaft of the motor penetrates through the mounting frame and the rotating frame to be fixedly connected with the motor shaft; the yarn trapper comprises a push rod, an installation part, a spring, a fixing cap and a clamping piece assembly, the yarn trapper is installed on the rotating frame, the push rod is installed in a sliding mode relative to the installation part, a jacking inclined table is arranged on the installation frame, and the motor drives the yarn trapper on the rotating frame to rotate, so that the push rod correspondingly abuts against or is away from the jacking inclined table. When the sewing machine is used for thread drawing, the thread take-up device can be well matched with the sewing machine to work and quickly act, and is timely matched with other devices to press threads, so that the sewing machine can better draw the threads, the technical defects existing in an existing structure are overcome, and the thread residue phenomenon of a bird nest is effectively prevented.

Description

Technical Field

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

[0002] When a sewing machine starts sewing, a certain length of thread needs to be left at the eye of the needle to ensure that the thread will not fall out of the eye of the needle when sewing begins. However, a certain length of thread on the eye of the needle will remain at the initial sewing position of the sewing material when sewing begins, affecting the appearance of the sewing material.

[0003] The traditional method is to manually pull the thread end at the beginning of sewing, so that the thread end remains on the sewing material, and then manually trim the thread end after the sewing work is completed. The more common processing method currently used is to set an electronic thread clamp in the thread passage of the machine head. When sewing, the electronic thread clamp will clamp the thread for a certain period of time, so that the hanging thread end is brought under the sewing material when sewing starts, and by clamping the thread, the thread end on the needle is pulled back to supply the thread when sewing starts, and finally the length of the thread end under the sewing material is shortened. However, this method transfers the thread end to the bottom of the sewing material, forming a bird's nest thread ball problem. Therefore, a sliding thread cutting device is set in conjunction with the thread clamp device. When sewing starts, the two devices are used to cut the thread end against the upper presser foot blade.

[0004] From the above description, it can be seen that the thread clamping device is a very important part. Since the sewing machine works quickly, the existing thread clamping device has defects in design and cannot work well together, so it needs further improvement. Summary of the Invention

[0005] The purpose of the present utility model is to solve the problems raised in the above background technology and provide a thread take-up device for a sewing machine.

[0006] In order to solve the above technical problems, the technical solution of the utility model is: a thread taking-up device of a sewing machine, comprising a machine head, a thread taking-up device is provided on the machine head, the thread taking-up device comprises a mounting frame, a motor, a rotating frame, and a thread clamp, the mounting frame is fixed to the machine head, the motor is mounted on the mounting frame, its motor shaft passes through the mounting frame, and the rotating frame is fixedly connected to the motor shaft; the thread clamp comprises a push rod, a mounting piece, a spring, a fixing cap, and a clip assembly, the thread clamp is mounted on the rotating frame, the push rod is slidably installed relative to the mounting piece, the suture in the sewing machine passes through the clip assembly, and a lifting ramp is provided on the mounting frame, the motor drives the thread clamp on the rotating frame to rotate, so that the push rod and the lifting ramp are correspondingly abutted or moved away from each other, thereby correspondingly driving the clip assembly to release or clamp the suture therein.

[0007] In the above-mentioned thread-taking device of a sewing machine, a mounting column is provided on the mounting frame, a mounting hole is provided at the mounting column, a mounting piece is fixedly installed in the mounting hole, and a fixing cap positions the clip assembly and the spring on the mounting piece.

[0008] In the above-mentioned thread-taking device of a sewing machine, the mounting part includes a mounting rod and a connecting rod. The mounting part is fixedly installed in the mounting hole through the mounting rod. A sliding groove is provided on the connecting rod. The clip assembly is pushed by the push rod and cooperated with the spring to achieve the release or compression of the suture therein.

[0009] In the above-mentioned thread-taking device of a sewing machine, the clip assembly includes an upper clip and a lower clip, and sliding holes are respectively provided on the upper and lower clips. The lower clip is movably mounted on the connecting rod, and the upper clip is mounted on the connecting rod and fixedly connected to the push rod. The push rod abuts against the lifting ramp and pushes the upper clip to slide upward to compress the spring. The upper clip slides upward relative to the lower clip to release the pressure on the suture therein. The push rod moves away from the lifting ramp, and the upper clip is reset under the elastic force of the spring to abut against the lower clip, thereby pressing the suture passing through the two.

[0010] In the above-mentioned thread-taking device of a sewing machine, a rod hole for a push rod to pass through is provided on the mounting rod, the rod hole corresponds to the slide groove, the push rod passes through the rod hole and the sliding hole on the lower clamp and is fixedly connected to the upper clamp, and the diameter of the push rod is smaller than the width of the slide groove.

[0011] In the above-mentioned thread-taking device of a sewing machine, a plurality of thread rods are provided on the rotating frame, and thread holes are provided on the thread rods.

[0012] In the above-mentioned thread take-up device of a sewing machine, the rotating frame is provided with an axial hole, and the motor shaft of the motor is fixedly connected to the rotating frame through the axial hole.

[0013] In the above-mentioned thread-taking device of a sewing machine, a positioning stop is provided on the mounting frame and on one side of the inclined platform.

[0014] In the above-mentioned thread-taking device of a sewing machine, the motor is a stepping motor.

[0015] The utility model has the following beneficial effects:

[0016] The thread-taking device designed by the present invention can cooperate well with the sewing machine to work quickly when the sewing machine is drawing the thread, and cooperate with other devices to press the thread in time, so that the sewing machine can better draw the thread, solve the technical defects of the existing structure, and effectively prevent the bird's nest thread end phenomenon. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 、 Figure 2It is a three-dimensional diagram of the take-up device in the utility model from two different directions;

[0018] Figure 3 This is an exploded view of the take-up device in the utility model;

[0019] Figure 4 It is a three-dimensional diagram of the mounting member in the present utility model;

[0020] Figure 5 It is a three-dimensional diagram of the present utility model. DETAILED DESCRIPTION

[0021] The present invention will be further described with reference to the accompanying drawings.

[0022] See also Figures 1 to 5 The utility model provides 1. A thread-taking device of a sewing machine, comprising a machine head 1, a thread-taking device 2 being provided on the machine head 1, the thread-taking device 2 comprising a mounting frame 3, a motor 4, a rotating frame 5, and a thread clamp 6, the thread clamp 6 comprising a push rod 8, a mounting member 9, a spring 10, a fixing cap 11, and a clip assembly 12.

[0023] The mounting frame 3 is fixed on the machine head 1, the motor 4 is mounted on the mounting frame 3, its motor shaft 7 passes through the mounting frame 3, and the rotating frame 5 is fixedly connected to the motor shaft 7. Preferably, the motor 4 is a stepping motor; specifically, an axial hole 24 is provided on the rotating frame 5, and the motor shaft 7 of the motor 4 is fixedly connected to the rotating frame 5 through the axial hole 24.

[0024] The thread clamp 6 is installed on the rotating frame 5. Specifically, a mounting column 14 is provided on the mounting frame 3, and a mounting hole 15 is provided at the mounting column 14. The mounting member 9 includes a mounting rod 16 and a connecting rod 17. The mounting member 9 is fixedly installed in the mounting hole 15 through the mounting rod 16; the fixing cap 11 positions the clip assembly 12 and the spring 10 on the mounting member 9. The clip assembly 12 includes an upper clip 19 and a lower clip 20. The upper and lower clips are respectively provided with sliding holes 26. The lower clip 20 is movably installed on the connecting rod 17. The upper clip 19 is installed on the connecting rod 17 and is fixedly connected to the push rod 8 at the same time. The suture in the sewing machine passes through the clip assembly 12.

[0025] The push rod 8 is slidably installed relative to the mounting member 9. A rod hole 21 for the push rod 8 to pass through is provided on the mounting rod 16 of the mounting member 9. A slide groove 18 is provided on the connecting rod 17. The rod hole 21 corresponds to the slide groove 18. The push rod 8 passes through the rod hole 21 and the sliding hole 26 on the lower clamping piece 20 and is fixedly connected to the upper clamping piece 19. The diameter of the push rod 8 is smaller than the width of the slide groove 18.

[0026] The mounting frame 3 is provided with a lifting ramp 13, and the motor drives the thread clamp 6 on the rotating frame 5 to rotate, so that the push rod 8 and the lifting ramp 13 are correspondingly abutted or moved away from each other. The clip assembly 12 is pushed by the push rod 8 and cooperated with the spring 10 to tighten or release the suture therein, thereby correspondingly driving the clip assembly 12 to tighten or release the suture therein.

[0027] The motor drives the thread clamp 6 on the rotating frame 5 to rotate. When the push rod 8 and the lifting ramp 13 are in contact with each other, the push rod 8 pushes the upper clamp 19 to slide upward and compress the spring. The upper clamp 19 slides upward relative to the lower clamp 20, and a gap is created between the two, thereby releasing the pressure on the suture between the two. At this time, the suture is in a normal sewing state; when the push rod 8 and the lifting ramp 13 are away from each other, the upper clamp 19 is reset under the elastic force of the spring 10 and abuts against the lower clamp 20, thereby compressing the suture passing through the two.

[0028] Furthermore, the rotating frame 5 is provided with a plurality of thread rods 22, and the thread rods 22 are provided with thread holes 23, through which the sutures pass, thereby preventing the sutures from being entangled during the rotation of the rotating frame and ensuring normal use.

[0029] Furthermore, a positioning stop 25 is provided on the mounting frame 3 and on one side of the jacking-up ramp 13. The positioning stop 25 can be used to position the rotation of the push rod, thereby positioning the rotation of the rotating frame, and better ensuring accurate use.

[0030] The above is a detailed introduction to a thread-taking device for a sewing machine provided by an embodiment of the present invention. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the technical solutions disclosed by the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scopes. In summary, the contents of this specification should not be understood as limiting the present invention.

Claims

1. A thread take-up device for a sewing machine, comprising a machine head (1), characterized in that: The machine head (1) is provided with a wire take-up device (2), which includes a mounting frame (3), a motor (4), a rotating frame (5), and a wire clamp (6). The mounting frame (3) is fixed on the machine head (1), the motor (4) is mounted on the mounting frame (3), and its motor shaft (7) passes through the mounting frame (3). The rotating frame (5) is fixedly connected to the motor shaft (7); the wire clamp (6) includes a push rod (8), a mounting member (9), a spring (10), a fixing cap (11), The clamping piece assembly (12) and the thread clamp (6) are mounted on the rotating frame (5), the push rod (8) is slidably mounted relative to the mounting member (9), the suture in the sewing machine passes through the clamping piece assembly (12), and the mounting frame (3) is provided with a jacking ramp (13). The motor drives the thread clamp (6) on the rotating frame (5) to rotate, so that the push rod (8) and the jacking ramp (13) are correspondingly abutted or separated, thereby correspondingly driving the clamping piece assembly (12) to release or press the suture therein.

2. A thread take-up device for a sewing machine according to claim 1, characterized in that: The mounting frame (3) is provided with a mounting column (14), and a mounting hole (15) is provided at the mounting column (14). The mounting member (9) is fixedly mounted in the mounting hole (15), and the fixing cap (11) positions the clip assembly (12) and the spring (10) on the mounting member (9).

3. A thread take-up device for a sewing machine according to claim 1 or 2, characterized in that: The mounting member (9) comprises a mounting rod (16) and a connecting rod (17). The mounting member (9) is fixedly mounted in the mounting hole (15) via the mounting rod (16). A sliding groove (18) is provided on the connecting rod (17). The clip assembly (12) is pushed by the push rod (8) and cooperates with the spring (10) to release or tighten the suture therein.

4. The thread take-up device of a sewing machine according to claim 3, characterized in that: The clip assembly (12) includes an upper clip (19) and a lower clip (20), and the upper and lower clips are respectively provided with sliding holes (26). The lower clip (20) is movably mounted on the connecting rod (17), and the upper clip (19) is mounted on the connecting rod (17) and fixedly connected to the push rod (8). The push rod (8) abuts against the lifting ramp (13) and pushes the upper clip (19) to slide upward to compress the spring. The upper clip (19) slides upward relative to the lower clip (20) to release the pressure on the suture therein. The push rod (8) moves away from the lifting ramp (13). The upper clip (19) is reset under the elastic force of the spring (10) and abuts against the lower clip (20), thereby pressing the suture passing therebetween.

5. The thread take-up device of a sewing machine according to claim 3, characterized in that: The mounting rod (16) is provided with a rod hole (21) for the push rod (8) to pass through, the rod hole (21) corresponds to the slide groove (18), the push rod (8) passes through the rod hole (21), the sliding hole (26) on the lower clamping piece (20) and is fixedly connected to the upper clamping piece (19), and the diameter of the push rod (8) is smaller than the width of the slide groove (18).

6. The thread take-up device of a sewing machine according to claim 1, characterized in that: A plurality of wire rods (22) are provided on the rotating frame (5), and wire holes (23) are provided on the wire rods (22).

7. A thread take-up device for a sewing machine according to claim 1 or 6, characterized in that: The rotating frame (5) is provided with an axial hole (24), and the motor shaft (7) of the motor (4) is fixedly connected to the rotating frame (5) through the axial hole (24).

8. A thread take-up device for a sewing machine according to claim 1 or 2, characterized in that: A positioning stop (25) is provided on the mounting frame (3) and on one side of the jacking-up inclined platform (13).

9. The thread take-up device of a sewing machine according to claim 1, characterized in that: The motor (4) is a stepping motor.

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