A light-controlled lighting device for a sewing machine
A lighting device and sewing machine technology, which is applied in the field of sewing machines, can solve problems such as the influence of the operator's eyesight, inability to adjust, and inability to adapt to different light environments, and achieve the effects of eye protection, energy saving, and low price
Active Publication Date: 2016-07-06
JACK SEWING MASCH CO LTD
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Problems solved by technology
In this way, the brightness of the lamp is fixed, the power consumption is constant, it cannot be adjusted, it cannot adapt to different light environments, and it will affect the operator's vision
Method used
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[0016] The present invention will be further described below with specific embodiment, see figure 1 :
[0017] A light-controlled lighting device for a sewing machine. A detection circuit 2 and a light sensor providing a control signal are electrically connected between a main control chip power supply 1 and a main control chip U1. The light sensor is connected between the positive pole and the negative pole of the power supply of the main control chip U1. And connected to the main control chip U1 through the detection circuit 2, the pulse width modulation output terminal PWM of the main control chip U1 is electrically connected to the isolated optocoupler U2, and the pulse control signal output by the isolated optocoupler U2 controls the lighting with an independent lighting power supply VC 3 brightness.
[0018] The control signal output by the above-mentioned isolated optocoupler U2 controls the brightness of the illuminating lamp 3 with an independent lighting power suppl...
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The invention belongs to the technical field of a sewing machine, and particularly relates to a light control illumination device for a sewing machine. A detection circuit and a light ray sensor used for providing control signals are electrically connected between a main control chip power supply and a main control chip, the pulse width modulation output end of the main control chip is electrically connected with an isolation optical coupler, pulse control signals output by the isolation optical coupler control the brightness of an illumination lamp with an independent illumination power supply, and the environment light rays can be detected through a light ray sensor (photoresistor). The resistance value change of the photoresistor is caused through different environment illumination intensity, so through detecting the voltage change of a resistor R4 in the circuit, the main control chip can estimate the environment illumination intensity at the time, the brightness of an LED (light emitting diode) is controlled to adapt to the environment light rays, and the light ray sensor has the advantages that the measuring range is wide, the use is convenient, the price is low, the transmission distance is long, and the light ray sensor can be conveniently arranged on various sewing machines and is applicable to various places; the brightness of the LED is automatically regulated, the eyesight of a user is protected, and the energy is also saved.
Description
Technical field: [0001] The invention belongs to the technical field of sewing machines, in particular to a light-controlled lighting device for sewing machines. Background technique: [0002] In the past, the sewing machine lighting circuit was directly connected to the power supply through a current-limiting resistor and the LED light, and a switch was used to control the light on and off. Like this, the brightness of lamp is fixed, and the electric energy that consumes is constant, can't be adjusted, can't adapt to different light environments, and can affect the visual acuity of the operator. Invention content: [0003] The object of the present invention is to provide a novel light-controlled lighting device for sewing machines, which is suitable for different environments, is convenient to use, protects the eyesight of users and saves energy. [0004] The present invention is achieved like this: [0005] A light-controlled lighting device for a sewing machine. A de...
Claims
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IPC IPC(8): H05B37/02
Inventor 李晓军
Owner JACK SEWING MASCH CO LTD