CN214193702U - Sewing machine upper thread detection mechanism and sewing machine - Google Patents

Abstract

The utility model provides a sewing machine upper thread detection mechanism and sewing machine belongs to sewing equipment technical field. It has solved its problem of wasting time and energy of adjusting of current facial line detection mechanism. This sewing machine face line detection mechanism, including controller, casing, sensor, knob and torsional spring, the sensor includes sensor probe and is connected with above-mentioned controller electricity, fixed mounting has the connecting axle on the casing, the knob is installed on the connecting axle and can rotate by relative connecting axle, the torsional spring is installed on above-mentioned knob, the torsional spring has the part of catching thread hook, its characterized in that: the sensor probe is fixedly arranged on the knob, and the thread take-up hook part is arranged corresponding to the sensor probe. The upper thread detection mechanism and the sewing machine have the advantages of simple structure, time saving and labor saving in adjustment.

Description

Sewing machine upper thread detection mechanism and sewing machine

Technical Field

The utility model belongs to the technical field of sewing machine, a sewing machine, especially a sewing machine upper thread detection mechanism and sewing machine are related to.

Background

The upper thread of the sewing machine is arranged outside the sewing machine, an operator can observe the use condition of the upper thread in real time during normal sewing, and when the upper thread is insufficient, the sewing can be stopped, and the upper thread can be replaced. When the cloth is sewn, the upper thread penetrates through the needle eye of the machine needle and moves up and down along with the machine needle at a high speed, during the high-speed movement, the thread breakage phenomenon happens occasionally, if the sewing is not found and stopped in time, the phenomena of empty sewing and seam leakage can occur, the sewing quality is influenced, and a large amount of time and energy are needed for reworking; for thicker sewing materials such as shoes or leather, the empty seams can leave a plurality of pinholes on the sewing materials, which affects the beauty and seriously leads to the scrapping of the sewing materials.

In order to check whether the upper thread is broken in time, the existing thread breakage detection mechanism of the sewing machine comprises a bottom plate, a sensor assembly, a knob and a torsion spring, wherein the sensor assembly is fixed on the bottom plate, and a thread picking hook part of the torsion spring leans against one side of an opening of the knob and is just right in the middle of a sensor probe. The operation principle is as follows: during normal sewing, if the upper thread is not broken, the thread picking hook part of the torsion spring swings under the action of periodic pulling of the upper thread, and in each sewing period, the thread picking hook part of the torsion spring swings, so that an optical signal received by a probe of the sensor assembly periodically changes in strength, and the sensor assembly outputs high and low levels; if the upper thread is broken, the upper thread loses tension, the thread taking-up hook part of the thread taking-up spring can be still and does not swing any more, the received optical signals of the sensor probe have the same intensity, and the sensor assembly only outputs high level or low level. Whether the upper thread is broken or not is judged according to the output signal of the sensor, so that the upper thread breakage can be accurately detected in real time, and the real-time feedback of whether the upper thread of the sewing machine is broken or not is ensured.

However, when the tension of the wire needs to be adjusted, the knob needs to be screwed to adjust the position of the hook wire of the torsion spring, and the screw needs to be unscrewed to adjust the position of the sensor, so that the hook wire of the torsion spring is positioned in the middle of the probe.

In conclusion, the thread take-up hook part of the torsion spring needs to be located in the middle of the sensor probe, otherwise, the optical signal cannot be acquired, so that the detection mechanism fails, the position of the sensor needs to be adjusted when the thread tension is adjusted, a screwdriver needs to be matched for screwing the screw, the adjustment process is time-consuming and labor-consuming, and the working efficiency is affected.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the technical problem, a sewing machine upper thread detection mechanism and sewing machine are proposed.

The purpose of the utility model can be realized by the following technical proposal:

the utility model provides a sewing machine face line detection mechanism, includes controller, casing, sensor, knob and torsional spring, the sensor includes sensor probe and is connected with above-mentioned controller electricity, fixed mounting has the connecting axle on the casing, the knob is installed on the connecting axle and can rotate by relative connecting axle, the torsional spring is installed on above-mentioned knob, the torsional spring has the portion of catching a thread hook, its characterized in that: the sensor probe is fixedly arranged on the knob, and the thread take-up hook part is arranged corresponding to the sensor probe.

In the above sewing machine surface thread detecting mechanism, the knob is provided with a mounting hole, and the sensor probe is fixedly mounted in the mounting hole.

In the sewing machine surface thread detection mechanism, the knob is provided with a convex block, and the mounting hole is formed in the convex block.

In the above sewing machine surface thread detecting mechanism, the sensor probe is fixedly embedded in the mounting hole.

In the sewing machine surface thread detection mechanism, the knob is provided with a notch, and the thread take-up hook part extends out of the notch.

In the sewing machine surface thread detection mechanism, the outer peripheral surface of the knob is provided with a strip-shaped groove.

In the sewing machine surface thread detection mechanism, the torsion spring is mounted on the knob through a torsion spring mandrel.

In the sewing machine surface line detection mechanism, one end of the torsion spring is fixedly connected to the connecting shaft, a groove is formed in the torsion spring core shaft, and the other end of the torsion spring is fixedly connected in the groove in a limiting mode.

In the above-mentioned upper thread detecting mechanism of sewing machine, further comprising a bottom plate fixedly installed on the machine shell, the above-mentioned connecting shaft is fixedly installed on the bottom plate.

The utility model also provides a sewing machine, sewing machine include sewing machine upper thread detection mechanism.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the utility model provides a knob integrated design need not to adjust facial line tension with the help of the instrument easily, simplifies facial line tension accommodation process for accommodation process is more swift effective, labour saving and time saving.

2. The utility model simplifies the upper thread detection mechanism, optimizes the assembly process and saves parts; simple structure, easy dismounting.

3. The utility model discloses can detect whether the facial line breaks in real time and accurately, avoid appearing empty joint, leak joint phenomenon because of the facial line breaks at the sewing in-process, improve sewing efficiency and quality.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is an exploded schematic view of the present invention.

In the figure, 1, a bottom plate; 2. a knob; 21. a bump; 22. mounting holes; 23. a notch; 24. a strip-shaped groove; 3. a torsion spring; 31. a thread take-up hook; 4. a sensor probe; 5. a connecting shaft; 6. a torsion spring core shaft.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

As shown in figures 1 and 2, the sewing machine surface line detection mechanism comprises a controller, a machine shell 1, a sensor, a knob 2 and a torsion spring 3, wherein the sensor comprises a sensor probe 4 and is electrically connected with the controller, a connecting shaft 5 is fixedly installed on the machine shell 1, the knob 2 is installed on the connecting shaft 5 and can rotate relative to the connecting shaft 5, the torsion spring 3 is installed on the knob 2 through a torsion spring mandrel 6, and the torsion spring mandrel 6 is sleeved on the outer side of the connecting shaft 5 and fixed through a screw. Specifically, one end of the torsion spring 3 is fixedly connected to the connecting shaft 5, a groove is formed in the torsion spring mandrel 6, and the other end of the torsion spring 3 is fixedly connected in the groove in a limiting mode. The sensor probe 4 may be fixed to the knob 2 by a screw, or may be fixed to the knob 2 by adhesion or the like. The knob 2 is provided with a mounting hole 22, and the sensor probe 4 is fixedly mounted in the mounting hole 22, preferably, the sensor probe 4 in the embodiment is fixedly embedded in the mounting hole 22. The torsion spring 3 has a thread take-up hook 31, and the thread take-up hook 31 is provided corresponding to the sensor probe 4. The utility model simplifies the upper thread detection mechanism, optimizes the assembly process and saves parts; simple structure, easy dismounting.

Preferably, the sewing machine surface thread detecting mechanism further comprises a bottom plate fixedly mounted on the machine shell, and the connecting shaft 5 is fixedly mounted on the bottom plate. Specifically, the knob 2 is provided with a projection 21, and the mounting hole 22 is formed on the projection 21. The knob 2 is provided with a gap 23, and the thread take-up hook part 31 extends out of the gap 23. The peripheral face of knob 2 has seted up bar recess 24, and this bar recess 24 application of force when being convenient for rotatory knob 2 prevents that the hand from skidding. The utility model provides a knob integrated design need not to adjust facial line tension with the help of the instrument easily, simplifies facial line tension accommodation process for accommodation process is more swift effective, labour saving and time saving.

In order to solve the inconvenient defect of tension adjustment of the surface thread detection line of the existing sewing machine, the design principle of the utility model is that the sensor probe 4 and the knob 2 are designed into a whole, when the surface thread tension is adjusted, no matter how many angles the knob 2 is twisted, the rotating angles of the sensor probe 4 and the torsion spring 3 are always kept consistent, thereby ensuring that the thread picking hook part 31 of the torsion spring 3 is arranged in the middle of the sensor probe 4; the assembly process is simplified, and the action of adjusting the sensor is omitted in the assembly process; and the knob of this integrated design need not to adjust facial line tension with the help of the instrument easily, labour saving and time saving improves work efficiency.

The control process of the facial line detection mechanism is as follows: the sensor probe 4 is integrated with a transmitting unit and a receiving unit, the transmitting unit intermittently transmits infrared light and irradiates on a thread picking hook part 31 of the torsion spring 3, the thread picking hook part 31 reflects part of the infrared light to the receiving unit, the receiving unit converts the received light intensity into a voltage signal and outputs the voltage signal to the controller, the controller performs A/D conversion on the voltage signal, processes and judges the obtained digital signal, and finally outputs the judgment signal to the electronic control module, when the electronic control module judges that the upper thread is broken according to the output of the sensor, the electronic control module controls a main motor of the sewing machine to brake, the sewing machine stops immediately, and meanwhile, the electronic control module triggers the alarm unit to alarm, waits for the operator to re-thread and relieves the fault alarm. The utility model discloses can detect whether the facial line breaks in real time and accurately, avoid appearing empty joint, leak joint phenomenon because of the facial line breaks at the sewing in-process, improve sewing efficiency and quality.

Meanwhile, when the controller calculates each time, the controller collects the voltage signal output by the receiving unit when the transmitting unit does not emit light and the voltage signal output by the receiving unit when the transmitting unit emits light, and performs subtraction operation on the voltage signal and the voltage signal, the voltage signal output by the receiving unit when the transmitting unit does not emit light is the signal when the picking hook part 31 reflects the ambient light to the receiving unit, so that the variation of the photoelectric signal when emitting light relative to the signal before emitting light is obtained, and the controller judges whether the picking hook part 31 of the torsion spring 3 is detected or not according to the variation. Therefore, the utility model discloses use the pulse technique, judge whether the facial line is broken string through the poor variable quantity of signal amplitude around the transmission unit is luminous relatively, effectively get rid of the influence of external environment light for the sensor has higher reliability, does not receive the interference of environment light, and then makes the utility model discloses can normally work under various environment light, extensive applicability.

Furthermore, the utility model also provides a sewing machine, this sewing machine includes above sewing machine face line detection mechanism.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Although the terms of the bottom plate 1, the knob 2, the projection 21, the mounting hole 22, the notch 23, the strip-shaped groove 24, the torsion spring 3, the thread take-up hook 31, the sensor probe 4, the connecting shaft 5, the torsion spring spindle 6, etc. are used more herein, the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed in a manner that is inconsistent with the spirit of the invention.

Claims (10)

1. The utility model provides a sewing machine face line detection mechanism, includes controller, casing (1), sensor, knob (2) and torsional spring (3), the sensor includes sensor probe (4) and is connected with above-mentioned controller electricity, fixed mounting has connecting axle (5) on casing (1), knob (2) are installed on connecting axle (5) and can be relative connecting axle (5) and rotate, install on above-mentioned knob (2) torsional spring (3), torsional spring (3) have the line of picking and collude portion (31), its characterized in that: the sensor probe (4) is fixedly arranged on the knob (2), and the thread take-up hook part (31) is arranged corresponding to the sensor probe (4).

2. The upper thread detecting mechanism of a sewing machine according to claim 1, characterized in that: the knob (2) is provided with a mounting hole (22), and the sensor probe (4) is fixedly mounted in the mounting hole (22).

3. The sewing machine face line detecting mechanism according to claim 2, characterized in that: the knob (2) is provided with a convex block (21), and the mounting hole (22) is formed in the convex block (21).

4. The sewing machine face line detecting mechanism according to claim 3, characterized in that: the sensor probe (4) is fixedly embedded in the mounting hole (22).

5. The upper thread detecting mechanism of a sewing machine according to claim 4, characterized in that: the knob (2) is provided with a gap (23), and the thread take-up hook part (31) extends out of the gap (23).

6. The upper thread detecting mechanism of a sewing machine according to claim 5, characterized in that: the outer peripheral surface of the knob (2) is provided with a strip-shaped groove (24).

7. The upper thread detecting mechanism of a sewing machine according to claim 1, characterized in that: the torsion spring (3) is arranged on the knob (2) through a torsion spring mandrel (6).

8. The sewing machine face line detecting mechanism according to claim 7, characterized in that: one end of the torsion spring (3) is fixedly connected to the connecting shaft (5), a groove is formed in the torsion spring mandrel (6), and the other end of the torsion spring (3) is fixedly connected to the groove in a limiting mode.

9. The upper thread detecting mechanism of a sewing machine according to claim 1, characterized in that: the connecting device also comprises a bottom plate fixedly arranged on the machine shell, and the connecting shaft (5) is fixedly arranged on the bottom plate.

10. A sewing machine characterized by: the sewing machine includes the sewing machine face-line detecting mechanism of any one of claims 1 to 9.

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