JPS60193494A - Exclusive illumination instrument of sewing machine - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a sewing machine-specific lighting fixture used as a work light for an industrial sewing machine.

``Background of the Invention'' In the sewing work of industrial sewing machines, as shown in FIG. 1, conventionally, as shown in FIG.
was attached, and the work surface 6 was irradiated while adjusting the irradiation direction.

The above conventional example does not use a light bulb as the light source, it is dazzling, and there is a large contrast between light and dark on the irradiated surface.Furthermore, since the work room is illuminated with fluorescent pairs, the color of the light on the work surface is different, and the fabric and thread are The drawback was that it was difficult to match the colors and it was very tiring for the eyes. When power is obtained from the excitation winding of a sewing machine motor, the light flickers due to a voltage drop when the motor is started, which repeats OtL OFF all the time, which increases eye fatigue.

In addition, there is a lot of heat shielding from the light source, which is a problem for workers.
Moreover, when adjusting the direction of irradiation, there was a danger of touching the heated shade.

``Object of the Invention'' The object of the present invention is to obtain a lighting fixture exclusively for sewing machines using a fluorescent lamp lit at a high frequency, which generates less heat and reduces eye fatigue.

``Summary of the Invention'' The present invention provides a lighting device exclusively for sewing machines having an arm fixed to the body of the sewing machine, including a fluorescent lamp, a high-frequency lighting circuit for lighting the fluorescent lamp, and a lighting device equipped with the fluorescent lamp and the lighting circuit. By providing a shade at the tip of the arm, it is possible to obtain a lighting fixture exclusively for sewing machines that generates less heat and reduces eye fatigue.

``Embodiments of the Invention'' Since the lighting equipment for sewing machines using light bulbs has the above-mentioned drawbacks, an attempt was made to implement a lighting equipment for sewing machines using fluorescent lights, but since the sewing machine needle moves, it was difficult to use ordinary choke coils. When the lamp is turned on, flickering occurs due to synchronization between the anode vibration of the fluorescent lamp and the vertical movement of the needle tip due to the product frequency. In addition, the heavy weight of the choke coil limits the arm's supporting capacity, making it impossible to use a normal flexible arm and making it impossible to use the lamp power source taken from the motor's excitation winding, so the fluorescent lamp is powered at high frequency. It was to be.

Embodiments of the present invention will be described with reference to the drawings. FIG. 2 is a perspective view showing an embodiment of the sewing machine lighting device according to the present invention attached to a sewing machine, and FIG. 3 is a plan view of the above embodiment.
FIG. 4 is a front view of the above embodiment, and FIG. 5 is a diagram showing an example of the high frequency lighting circuit of the above embodiment. In FIG. 2, the sewing machine-specific lighting equipment has a shade 9 that supports a fluorescent lamp 7 and a high-frequency lighting circuit 8 for lighting the fluorescent lamp 7 at the tip of an arm 3 made of a flexible pipe. It is fixed to the sewing machine body 1 by a metal fitting 2. As shown in FIGS. 3 and 4, the above-mentioned sewing machine-specific lighting equipment has a fluorescent wrap 7 on the operator's side when installed, and a high-frequency lighting circuit 8 behind it to make it as small and thin as possible. The constructed shade 9 is attached to one end of the flexible arm 3, and a fixing metal fitting 2 is attached to the other end. In the embodiment, the region of the fluorescent lamp 7 is covered with a transparent cover 1.
0, but there is no problem even if the fluorescent lamp 7 is exposed. An example of the high-frequency lighting circuit 8 is shown in FIG. 5, and the volume of the lighting circuit using a choke coil is 825 cm.
3, the amount of M is α531y, whereas the volume of the high frequency lighting circuit 8 shown in FIG. 5 is 5770m3 and the weight is 032k.
It is g. Therefore, instead of making the shade 9 small, it is possible to sufficiently hold the shade part at any position by using a normal flexible arm 3 having an outer diameter of 131111 and a length of 35C11. Fix the fixture 2 of the lighting fixture for the sewing machine to the sewing machine body 1, and connect the power source connection wire 1 of the lighting fixture to the lamp power source (AC6, 5V) taken out from the excitation winding of the sewing machine drive motor. When connected, the fluorescent lamp 7 is turned on at high frequency by the high frequency lighting circuit 8. Therefore, the work surface 6 can be illuminated with the same light color as the illumination of the work room without flickering when the needle tip moves downward. Also, since the amount of heat generated from the light source is small,
The direction of illumination can be adjusted safely.The high-frequency lighting circuit 8 shown in FIG. The oscillation frequency is not limited as long as FL6) can generate a high frequency point. The arm 3 is not limited to a flexible arm, but by using a flexible 7mm as in the embodiment, the vibration of the sewing machine body 1 is absorbed and centered, and the actual measured value of vibration is based on the mounting part of the lighting equipment. is 1.07 G, while at the tip of the shade 9 it is approximately halved to 0.51 G, so a flexible arm can be used to protect the electrodes of the fluorescent rung and parts of the high-frequency lighting circuit 80. desirable.

"Effects of the Invention" As described above, the lighting fixture for sewing machines according to the present invention having an arm fixed to the body of the sewing machine includes a fluorescent lamp, a high-frequency lighting circuit for lighting the fluorescent lamp, By equipping the tip of the arm with a shade equipped with a lighting circuit, compared to similar lighting equipment using conventional light bulbs, there is less glare and contrast between light and dark, and the light color is the same as that of the lighting in the work room. This provides illumination, and because the high-frequency lighting does not cause flickering of the needle tip, eye fatigue can be significantly reduced, and since the light source generates little heat, the irradiation direction can be adjusted safely.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing a conventional lighting fixture exclusively for sewing machines attached to a sewing machine, FIG. 2 is a perspective view showing an embodiment of a lighting fixture exclusively for sewing machines according to the present invention mounted to a sewing machine, and FIG. 4 is a plan view of the embodiment described above, FIG. 4 is a quantitative diagram of the embodiment described in (1)-, and FIG. 5 is a diagram showing an example of the high frequency and Q pair circuit of the embodiment described above. 1. Sewing machine body, 3.Ar L, 7. Fluorescent wrap, 8. High frequency point 1 circuit, 9. Shade. When 1 Zufutsu 2I21

Claims (1)

[Claims] In a sewing machine-specific lighting device having an arm fixed to the body of the sewing machine, a fluorescent lamp, a high-frequency lighting circuit for lighting the fluorescent lamp, and a shade equipped with the fluorescent lamp and lighting circuit are connected to the arm. A lighting fixture exclusively for sewing machines that is equipped at the tip.