Sewing machine tightener with scales

Abstract

The utility model discloses a sewing machine tightener with scales, which belongs to the technical field of tighteners and comprises a screw shaft, the surface of the screw shaft is in threaded connection with a nut block, the surface of the nut block is rotatably connected with an external connection ring, the end face of one end of the nut block is rotatably connected with a knob ring, and the surface of the screw shaft is slidably connected with a movable clamping plate. A spring is fixedly connected between the annular piece and the movable clamping plate, a fixed clamping plate is fixedly connected to the surface of the screw shaft, a swing arm is rotationally connected to the position, close to the fixed clamping plate, of the surface of the screw shaft, and a rotating shaft is fixedly connected to one end of the swing arm. According to the utility model, through the arrangement of the correlation photoelectric sensor, the swing arm and the movable roll shaft, when the tension force of a wire is not enough or too large, the swing arm can drive the correlation photoelectric sensor to move, so that the correlation photoelectric sensor on the mounting rod cannot receive a signal and feeds back the signal to the single chip microcomputer, and the single chip microcomputer controls the bulb to light, thereby playing a role in reminding.

Description

Technical Field

[0001] The utility model relates to the technical field of thread tighteners, in particular to a thread tightener for sewing machines with scales. Background Art

[0002] The sewing machine combines the upper thread and the lower thread through the cooperation of the needle above the needle plate and the rotary shuttle below the needle plate to form a seam on the fabric.

[0003] When the sewing machine is working, it is necessary to adjust the tension of the upper thread and the lower thread to ensure that the seam is smooth and beautiful. When the existing thread tensioner is in use, it is generally achieved by driving the dynamic pressure plate to move through the nut to realize the thread clamping function, thereby adjusting the thread tension. However, the existing thread tensioner cannot give a prompt when the thread tension is insufficient or too large, and there is no prompt when changing threads of different thicknesses. When using it, the thread tensioner can only be adjusted according to the tightness of the thread based on experience. Therefore, a sewing machine thread tensioner with a scale is proposed to solve the above problems. Utility Model Content

[0004] The utility model aims to solve the problems that the existing thread tensioner in the prior art cannot give a prompt when the tension of the thread is insufficient or too large, and when changing threads of different thicknesses, there is no prompt when adjusting the thread tensioner, and the thread tensioner can only be adjusted according to the tension of the thread based on experience during use, and a sewing machine thread tensioner with a scale is proposed.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A sewing machine thread tensioner with a scale comprises a screw shaft, a nut block is threadedly connected to the surface of the screw shaft, an external ring is rotatably connected to the surface of the nut block, a knob ring is rotatably connected to one end surface of the nut block, a movable splint is slidably connected to the surface of the screw shaft, an annular sheet is rotatably connected to the other end surface of the nut block, a spring is fixedly connected between the annular sheet and the movable splint, a fixed splint is fixedly connected to the surface of the screw shaft, a swing arm is rotatably connected to the surface of the screw shaft near the fixed splint, one end of the swing arm is fixedly connected to a rotating shaft, and the surface of the rotating shaft is rotatably connected to a movable roller shaft.

[0007] Preferably, a sliding through hole is provided inside the outer ring, a scale plate penetrating the sliding through hole is fixedly connected to a side of the movable clamping plate facing the outer ring, and a light bulb is installed at one end of the scale plate.

[0008] Preferably, a mounting rod is installed on the side wall of the movable splint, and a through-beam photoelectric sensor is also installed on one end of the mounting rod, and the through-beam photoelectric sensors on both sides are aligned.

[0009] Preferably, a mounting block is installed on the side wall of the fixed clamping plate, and a guide roller is rotatably connected to the surface of the mounting block.

[0010] Preferably, the line between the movable clamping plate and the fixed clamping plate passes under the movable roller through the guidance of the guide roller.

[0011] Preferably, a single chip microcomputer is installed on one side of the external ring, and the single chip microcomputer is electrically connected to the opposing photoelectric sensor and the light bulb.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] 1. The utility model is provided with a through-beam photoelectric sensor, a swing arm and a movable roller. When the tension of the line is insufficient or too large, the swing arm will drive the through-beam photoelectric sensor to move, so that the through-beam photoelectric sensor on the mounting rod cannot receive the signal, thereby feeding back the signal to the single-chip microcomputer, and the single-chip microcomputer controls the light bulb to light up, thereby playing a reminder role.

[0014] 2. The utility model is provided with a scale plate, a nut block and an external ring, and utilizes a knob ring to drive the nut block to rotate, thereby driving the external ring to move. The compression distance of the spring can be accurately understood in conjunction with the scale plate, thereby indirectly controlling the clamping force of the movable splint on the front. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the three-dimensional structure of a sewing machine thread tightener with scale proposed by the utility model;

[0016] Figure 2 A schematic diagram of the three-dimensional structure of a sewing machine thread tensioner with scale proposed by the utility model Figure 2 ;

[0017] Figure 3 This is a schematic diagram of the connection structure between a movable splint and an external connecting ring in a sewing machine thread tightener with scale proposed by the utility model;

[0018] Figure 4 The utility model discloses a schematic diagram of the connection structure of a screw shaft, a movable clamping plate and a fixed clamping plate in a sewing machine thread tightener with a scale.

[0019] In the figure: 1. screw shaft; 2. knob ring; 3. external ring; 4. nut block; 5. scale plate; 6. movable splint; 7. fixed splint; 8. guide roller; 9. swing arm; 10. movable roller; 11. through-beam photoelectric sensor; 12. mounting rod; 13. spring; 14. ring sheet; 15. light bulb. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0021] Reference Figure 1-4 A sewing machine thread tensioner with a scale comprises a screw shaft 1, a nut block 4 is threadedly connected to the surface of the screw shaft 1, an external ring 3 is rotatably connected to the surface of the nut block 4, a knob ring 2 is rotatably connected to one end surface of the nut block 4, a movable splint 6 is slidably connected to the surface of the screw shaft 1, an annular sheet 14 is rotatably connected to the other end surface of the nut block 4, a spring 13 is fixedly connected between the annular sheet 14 and the movable splint 6, and a fixed splint 7 is fixedly connected to the surface of the screw shaft 1; a sliding through hole is opened inside the external ring 3, a scale plate 5 arranged through the sliding through hole is fixedly connected to the side of the movable splint 6 facing the external ring 3, and a light bulb 15 is installed at one end of the scale plate 5.

[0022] It should be noted that: by rotating the knob ring 2, the nut block 4 is driven to move, and then the spring 13 is driven to move, and the spring 13 drives the movable splint 6 to move. The movable splint 6 can realize the clamping function of the wire. The scale plate 5 can be used to accurately understand the compression distance of the spring 13, and then control the clamping force of the movable splint 6 on the wire, thereby facilitating the control of the tension of the wire.

[0023] The surface of the screw shaft 1 is rotatably connected to a swing arm 9 near the fixed clamping plate 7, one end of the swing arm 9 is fixedly connected to a rotating shaft, and the surface of the rotating shaft is rotatably connected to a moving roller shaft 10, a mounting rod 12 is installed on the side wall of the movable clamping plate 6, and one end of the mounting rod 12 is also installed with a through-beam photoelectric sensor 11, and the through-beam photoelectric sensors 11 on both sides are aligned, and a single-chip microcomputer is installed on one side of the external ring 3, and the single-chip microcomputer is electrically connected to the through-beam photoelectric sensor 11 and the light bulb 15;

[0024] It should be noted that when the tension of the line is insufficient or too large, the swing will drive the through-beam photoelectric sensor 11 to move, so that the through-beam photoelectric sensor 11 on the mounting rod 12 cannot receive the signal, thereby feeding back the signal to the microcontroller, and the microcontroller controls the light bulb 15 to light up, thereby serving as a reminder.

[0025] Furthermore, a mounting block is installed on the side wall of the fixed clamping plate 7, and a guide roller 8 is rotatably connected to the surface of the mounting block. The line between the movable clamping plate 6 and the fixed clamping plate 7 passes under the movable roller 10 through the guide of the guide roller 8;

[0026] It should be noted that the guide roller 8 can guide the wire, and the wire passing under the movable roller 10 can support the movable roller 10. When the tension of the wire is insufficient or too large, the movable roller 10 will be offset, thereby causing the originally aligned opposing photoelectric sensor 11 to be offset.

[0027] When the utility model is in use, the nut block 4 is driven to move by rotating the knob ring 2, thereby driving the spring 13 to move, and the spring 13 drives the movable splint 6 to move, and the movable splint 6 can realize the clamping function of the wire. When the movable splint 6 contacts the wire, the nut block 4 continues to move to compress the spring 13. At this time, the external ring 3 and the scale plate 5 start to move relative to each other. The scale plate 5 can realize the function of accurately understanding the compression distance of the spring 13, thereby controlling the clamping force of the movable splint 6 on the wire, thereby facilitating the control of the tension of the wire.

[0028] When the tension of the line is insufficient or too large (when the tension of the line is too large, the movable roller 10 will be lifted, thereby causing one end of the swing arm 9 to move upward; when the tension of the line is insufficient, the movable roller 10 will move downward, thereby driving one end of the swing arm 9 to move downward), the swing arm 9 will drive the through-beam photoelectric sensor 11 to move, so that the through-beam photoelectric sensor 11 on the mounting rod 12 cannot receive the signal, thereby feeding back the signal to the single-chip microcomputer, causing the single-chip microcomputer to control the light bulb 15 to light up, thereby serving as a reminder.

[0029] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A sewing machine thread tensioner with a scale, comprising a screw shaft (1), characterized in that: The surface of the screw shaft (1) is threadedly connected to a nut block (4), the surface of the nut block (4) is rotatably connected to an external ring (3), one end face of the nut block (4) is rotatably connected to a knob ring (2), the surface of the screw shaft (1) is slidably connected to a movable clamp (6), the other end face of the nut block (4) is rotatably connected to an annular plate (14), a spring (13) is fixedly connected between the annular plate (14) and the movable clamp (6), the surface of the screw shaft (1) is fixedly connected to a fixed clamp (7), the surface of the screw shaft (1) is rotatably connected to a swing arm (9) near the fixed clamp (7), one end of the swing arm (9) is fixedly connected to a rotating shaft, and the surface of the rotating shaft is rotatably connected to a movable roller shaft (10).

2. A sewing machine thread tensioner with scale according to claim 1, characterized in that: A sliding through hole is provided inside the outer ring (3), and a scale plate (5) penetrating the sliding through hole is fixedly connected to a side of the movable clamping plate (6) facing the outer ring (3), and a light bulb (15) is installed at one end of the scale plate (5).

3. A sewing machine thread tensioner with scale according to claim 1, characterized in that: A mounting rod (12) is installed on the side wall of the movable clamping plate (6), and a counter-beam photoelectric sensor (11) is also installed on one end of the mounting rod (12). The counter-beam photoelectric sensors (11) on both sides are aligned.

4. A sewing machine thread tensioner with scale according to claim 1, characterized in that: A mounting block is installed on the side wall of the fixed clamping plate (7), and a guide roller (8) is rotatably connected to the surface of the mounting block.

5. The sewing machine thread tensioner with scale according to claim 1, characterized in that: The line between the movable clamping plate (6) and the fixed clamping plate (7) passes under the movable roller (10) under the guidance of the guide roller (8).

6. A sewing machine thread tensioner with scale according to claim 1, characterized in that: A single chip microcomputer is installed on one side of the external connection ring (3), and the single chip microcomputer is electrically connected to the opposite-beam photoelectric sensor (11) and the light bulb (15).

Images