JPS6237358Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to an automatic light control device for dental lighting equipment, and in particular, the brightness of the dental lighting equipment used to illuminate the patient's oral cavity during dental treatment can be controlled within the treatment room. It automatically adjusts according to the brightness, in other words, so that the difference between the brightness in the treatment room and the brightness inside the oral cavity is approximately constant, thereby reducing eye fatigue for the surgeon. It is something.

Generally, in dental treatment, lighting equipment is used to illuminate the inside of the patient's oral cavity when treating the patient, and conventionally, as a means to adjust the brightness, there are switchable types and volume type types. Several methods have been proposed, but all of them require manual adjustment, which is time-consuming, and in reality, they are used without much adjustment. However, since the brightness inside the treatment room changes considerably depending on the weather and the like, the difference between the brightness inside the room and the brightness inside the oral cavity becomes quite large, which increases the eye fatigue of the operator.

The present invention was developed with a focus on the above-mentioned circumstances, and in particular, the difference between the brightness inside the treatment room and the brightness inside the oral cavity caused by the lighting equipment is always kept approximately constant. If the brightness gets darker, the brightness in the oral cavity will be reduced accordingly, and conversely, if the brightness in the treatment room becomes brighter, the brightness in the oral cavity will be brightened accordingly, thereby reducing eye fatigue for the surgeon. This was done to reduce the amount.

The figure shows an example of an electric circuit used in the automatic light control device for dental lighting equipment according to the present invention, in which 1 is a lighting lamp attached to the dental lighting equipment, 2 is a rectifier circuit, and 3 is a lighting lamp 1. The control circuit 3 includes a thyristor 4, a volume resistor 5 for manually adjusting the absolute brightness of the illumination lamp 1, and a control circuit that detects the brightness in the treatment room and controls the illumination lamp. 1
A photoelectric conversion element (CDS) 6 for automatically adjusting the brightness of the lamp according to the brightness in the treatment room, a resistor 7 for adjusting the degree of change in absolute brightness of the lighting lamp 1, a photoelectric conversion element It consists of a resistor 8 etc. for adjusting the degree of change in brightness caused by the (CDS) 6, and the resistance of the photoelectric conversion element (CDS) 6 is changed according to the brightness in the treatment room, and the resistance change The firing angle of the thyristor 4 is controlled in phase by , so that when the treatment room is bright, the brightness of the illumination lamp 1 is increased, and when the treatment room is dark, the brightness of the illumination lamp 1 is decreased, and the brightness of the illumination lamp 1 is decreased when the treatment room is dark. The difference between the brightness and the brightness inside the oral cavity is always kept approximately constant.

Therefore, according to the present invention, the brightness inside the oral cavity is automatically adjusted according to the brightness inside the treatment room, and the difference in brightness between the treatment room and the inside of the oral cavity is always maintained at a substantially constant level, so that the treatment time can be improved. This can reduce eye fatigue.

[Brief explanation of the drawing]

The figure is a diagram showing an example of an electric circuit used in the automatic light control device for dental lighting equipment according to the present invention. 1... Lighting lamp, 2... Rectifier, 3... Control circuit, 4... Thyristor, 6... CDS.

Claims (1)

[Scope of utility model registration request] A dental lighting device used for illuminating the inside of a patient's oral cavity in dental treatment, comprising a detection means for detecting brightness in a treatment room and a control means for controlling power supplied to the illumination lamp, An automatic light control device for a dental lighting device, characterized in that the power control means is controlled and adjusted by means of means such that the difference between the brightness inside the treatment room and the brightness inside the oral cavity is substantially constant.