Abstract: The present invention relates to a light irradiation hygiene device with a PCB directly assembled into the main body. The device includes a main body housing the handle and head sections, a PCB configured to match the main body's shape, a power button in the handle section, a light irradiation unit with multiple light sources, a vibration motor attached via soldering, and a toothbrush head plate. The structure reduces noise and improves vibration stability, increasing convenience for users. The one-piece structure of the PCB enhances cost competitiveness, assembly efficiency, and durability, while minimizing failure points due to the removal of connecting parts. Attaching the vibration motor to the PCB, which matches the main body's shape, reduces the number of vibrating parts, decreasing noise, and simplifying the manufacturing process, leading to cost reduction and improved productivity.

Abstract: The present invention relates to a light-based sanitation device using a PCB-mounted motor. The device consists of a main body, a PCB arranged inside the main body, a power button in the handle area, and a light source unit in the head area. A vibration motor is attached to the upper end of the handle section and soldered to the PCB via soldering. A toothbrush head is fastened to the light source unit, with at least one toothbrush bristle formed using a waveguide. This configuration reduces noise, improves vibration stability, and enhances user convenience. The device also simplifies the manufacturing process by configuring the existing PCB with multiple or segmented structures into a single-piece structure, leading to cost reduction and potential improvements in productivity.

Abstract: The present invention relates to an electric toothbrush comprising: a plurality of LEDs (121) for irradiating light, in a toothbrush head region in which a brush mount portion is formed; a plurality of magnets (150) that dissipate heat generated from the LEDs (121); and a sensor unit (160) for measuring a biological signal.

Abstract: The present invention relates to a light-therapeutic mouth guard that maximizes sterilization and anti-inflammatory effects on teeth and gingiva by increasing emission intensity through overlapping light-emitting elements. The invention includes a guard body, worn in the mouth, accommodating teeth and gingiva with an accommodation groove. The groove consists of a masticatory surface-facing part that corresponds to the teeth row, and inner and outer wall parts facing the teeth and gingiva from both sides. A side light-emitting element is provided on the inner and/or outer wall part of the guard body to emit light at the side surfaces of the gingiva and teeth. The side light-emitting element is arranged in multiple rows to overlap the emitted light, thereby increasing emission intensity.

Abstract: Provided is a light irradiated toothbrush, in which light sources, irradiating light having mutually different wavelengths, are arranged in alternation at the bottom of waveguide bristles so that light of different wavelengths give rise to constructive interference which strengthens the intensity of the irradiated light, and the height of the light sources are varied on the basis of the wavelength of the light irradiated therefrom so as to effectively transmit light of short wavelengths to the waveguide bristles, and light having mutually different wavelengths are transmitted by means of the waveguide bristles, thereby effectively transmitting the light to the mouth of a user.

Abstract: Provided is a light irradiated toothbrush, in which light sources, irradiating light having mutually different wavelengths, are arranged in alternation at the bottom of waveguide bristles so that light of different wavelengths give rise to constructive interference which strengthens the intensity of the irradiated light, and the height of the light sources are varied on the basis of the wavelength of the light irradiated therefrom so as to effectively transmit light of short wavelengths to the waveguide bristles, and light having mutually different wavelengths are transmitted by means of the waveguide bristles, thereby effectively transmitting the light to the mouth of a user.

Abstract: Provided is a light irradiated toothbrush, in which light sources, irradiating light having mutually different wavelengths, are arranged in alternation at the bottom of waveguide bristles so that light of different wavelengths give rise to constructive interference which strengthens the intensity of the irradiated light, and the height of the light sources are varied on the basis of the wavelength of the light irradiated therefrom so as to effectively transmit light of short wavelengths to the waveguide bristles, and light having mutually different wavelengths are transmitted by means of the waveguide bristles, thereby effectively transmitting the light to the mouth of a user.

Abstract: Provided is a light irradiated toothbrush, in which light sources, irradiating light having mutually different wavelengths, are arranged in alternation at the bottom of waveguide bristles so that light of different wavelengths give rise to constructive interference which strengthens the intensity of the irridiated light, and the height of the light sources are varied on the basis of the wavelength of the light irradiated therefrom so as to effectively transmit light of short wavelengths to the waveguide bristles, and light having mutually different wavelengths are transmitted by means of the waveguide bristles, thereby effectively transmitting the light to the mouth of a user.

Abstract: Provided is a light irradiating toothbrush, in which light sources, irradiating light having mutually different wavelengths, are arranged in alternation at the bottom of waveguide bristles so that light of different wavelengths give rise to constructive interference which strengthens the intensity of the irradiated light, and the height of the light sources are varied on the basis of the wavelength of the light irradiated therefrom so as to effectively transmit light of short wavelengths to the waveguide bristles, and light having mutually different wavelengths are transmitted by means of the waveguide bristles, thereby effectively transmitting the light to the mouth of a user.