JPH10137263A - Dental treatment device having illumination mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To emit white light with a single LED chip and to intensify the luminous intensify of emitted light so as to illuminate an exposure part by providing an illumination mechanism of a dental treatment device having illumination mechanism in a hand-held member with a layer of a phosphor on the LED chip and emitting white light. SOLUTION: A pressurized water path, pressurized air path and power source path are internally disposed at the rear part 2 of the hand-held member. The front end of an axial center part is projectingly provided with a circular fitting shaft part 5 having a terminal member 1. The rear end is provided with a juncture 6 for flexible hoses to be respectively connected a pressure supply source, pressure air source and external power source. This terminal member 1 is provided with female type terminals 7, 8. The front part of a light emitting part 3 is projectingly provided with a translucent part 11 sealed with the LED chip 22 which has the layer of the phosphor and emits the while light. The rear part is projectingly provided with terminals 12, 13 of a male type respectively connected to the terminals 7, 8 of the female type. An outer cylinder 4 consists of a cylindrical body 16 which is opened with a window hole 17 on its outer periphery. The rear end 18 of this cylinder body 16 is screwed to the front end of a fitting shaft part 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dental treatment instrument provided with an illumination mechanism.

[0002]

2. Description of the Related Art Conventionally, among dental treatment apparatuses having an illumination mechanism for irradiating the inside of the oral cavity, those having an LED chip in the illumination mechanism include, for example, JP-A-7-328032 and JP-A-8-14001. The invention disclosed in Japanese Patent Laid-Open Publication No. H10-26095 is known.

The invention described in Japanese Patent Application Laid-Open No. 7-328032 discloses a light-emitting unit 1 comprising a full-color LED and a rear end 2 of a hand-held member having a terminal member 1 as shown in FIG.
3 and an outer cylinder 4 for protecting the light emitting section 13. The light emitting section 13 encloses green, red, and blue light emitting elements constituting the three primary colors, and the male terminals 12, 1
Four terminals 3, 14, 15 are protrudingly provided, each of which can be connected to each of the corresponding female terminals 7, 8, 9, 10 on the terminal member 1 side, and the other end of the light emitting section 13 is transparent. The light section 11 is provided to emit white light by a combination of LED chips (light emitting elements).

In the invention described in Japanese Patent Application Laid-Open No. H08-141001, as shown in FIG. 10, a light emitting portion 52 is used, for example, about 480 effective for curing a resin used at the time of tooth restoration.
A plurality of LED chips 51 that emit light having a wavelength of nm are used as a light emitting portion for photopolymerization. The LED chips 51 are formed into a microlens shape in order to obtain airtightness and directivity of light. Are integrated into a package 59 to emit light from the plurality of LED chips 51 to a lens 53.
, And the light is guided to the tip 58 by the light guide 54 for irradiation. Reference numeral 55 in the drawing indicates an example in which a battery is used as a power supply.

[0005]

However, the invention described in Japanese Patent Application Laid-Open No. Hei 7-328032 is an LED chip configuration in which the three primary colors of green, red, and blue are in a complementary color relationship. Four terminals are required for electrical connection, and a current adjustment circuit (not shown) is required for adjusting each of the three primary colors. The illumination mechanism having this configuration has a problem in that even if one of the three LEDs is deteriorated, the color balance is lost and white light emission cannot be obtained.

In the invention described in Japanese Patent Application Laid-Open No. 8-141001, since the LED chip 51 is integrally formed in the package 59, when the LED chip 51 becomes defective, the entire package 59 is manufactured. There is a problem that must be discarded.

SUMMARY OF THE INVENTION Accordingly, the present invention has been made in view of the above-mentioned problems, and provides a light emitting unit that emits white light with one LED chip and that can irradiate an exposure unit with enhanced luminous intensity. An object of the present invention is to provide a dental treatment apparatus provided for a medical treatment.

[0008]

According to a first aspect of the present invention, there is provided a dental treatment apparatus having an illumination mechanism for irradiating the inside of a mouth with a hand-held member. And a light emitting portion for providing white light by providing a phosphor layer on the LED chip. In the case of a conventional full-color LED composed of three primary color light emitting elements of green, red and blue, each element is Compared to four terminals required for electrical connection, connection is possible with two terminals. Further, a current adjustment circuit for adjusting the emission color is not required, and the color balance is not lost. According to a second aspect of the present invention, a plurality of LED chips are connected in parallel with each other in the first aspect, so that the luminous intensity with respect to the irradiation unit can be increased. In a third aspect, a plurality of LED chips are connected in series in the first aspect, and it is possible to increase the luminous intensity with respect to the irradiation unit. Claim 4
4. In order to concentrate light emission of a plurality of LED chips according to claim 1, 2 or 3, each chip is manually provided at an angle in a direction in which light can be collected, and the luminous intensity irradiating the exposure unit is enhanced. It becomes possible to do. According to a fifth aspect of the present invention, in the first, second, third, or fourth aspect, the light-transmitting portion forming the light-emitting body is provided with a condenser lens for condensing light emission. . Since the LED chip body of the present invention is similar to a general light bulb having two connection terminals, the LED chip can be easily replaced.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be specifically described below with reference to the drawings. In each of the embodiments, common points are assigned the same reference numerals and correspond to each other to omit redundant description.

(Embodiment 1) FIGS. 1 to 4 show Embodiment 1 of the present invention, FIG. 1 is an exploded perspective view of a dental treatment apparatus of the present invention, and FIG. Diagram showing a plane,
FIG. 3 is a sectional view of the light emitting section, and FIG. 4 is an enlarged sectional view of the phosphor application section. As shown in FIG. 1, the dental treatment apparatus of the present invention includes a rear portion 2 of a hand-held member having a terminal member 1, a light-emitting portion 3, and an outer cylinder 4 for protecting the light-emitting portion 3. A pressurized water passage, a pressurized air passage, and a power supply passage required for dental treatment work are provided in the rear portion 2 and a circular fitting shaft portion 5 having a terminal member 1 at a tip is provided at an axial center portion. At the rear end, there is provided a connection portion 6 of a flexible hose for connecting the rear portion 2 to each of a pressurized supply source, a pressurized air source, and an external power supply.

The terminal member 1 is provided with diametrically opposed female terminals 7 and 8 as shown in FIG. 2, while a light-transmitting portion 11 in which an LED chip is sealed in front of the light-emitting portion 3 is provided. ,
Male terminals 12 and 13 connected to the female terminals 7 and 8 respectively are protruded from the rear portion.

The outer cylinder 4 comprises a cylindrical body 16 having an inner shape and a length sufficient to allow the light emitting portion 3 to be loosely fitted therein, and has window holes 17 at four locations on the outer periphery. . This cylinder 16
The rear end 18 is screwed to the front end of the fitting shaft 5.

For example, when the hand-held member is a dental cutting device, the rear portion 2 of this structure is rotated at high speed by pressurized air at the tip of the head as well as the mounting and dismounting of the cutting tool. A built-in air turbine is provided, and a spray nozzle and an exposure unit for cooling a tooth cutting part are provided, respectively. Further, in addition to a pressurized water channel and a pressurized air channel, a rear end face has a light emitting unit 3. The light emitting unit 3 is opposed to the light transmitting unit 11.
The optical fiber for guiding the light beam from the light source to the exposure unit can be connected to a front part (not shown) arranged along the axis.

Light-emitting unit 3 attached to the dental treatment apparatus
3 and 4, the light emitting section 3 has an anode terminal 12 and a cathode terminal 13 and has a cathode terminal 1 in a sealed light transmitting section 11 as shown in FIGS.
A concave portion 21 is formed at one end 20 of the base 3, and an LED chip 22 is provided on the bottom surface of the concave portion 3. Wire bonding 24 and 25 are applied to each of the terminals 12 and 13 to be electrically connected to each other. The phosphor layer 23 is formed on the surface of the disposed LED chip 22.

The phosphor layer 23 is made of, for example, yttrium, aluminum, or garnet.
As shown in FIG. 7, the light emitted from the LED chip 22 passes through the phosphor layer 23 to become white light 27 similar to a daylight fluorescent lamp.

Then, as described above, the LED chip 22
The two terminals 12 and 13 protruding from the rear of the light emitting section 3 having a configuration in which a phosphor layer 23 is formed on the surface of
It is connected to each of the female terminals 7 and 8 of the terminal member 1 provided on the rear part 2 of the hand-held member, and the outer peripheral surface of the light emitting unit 3 is protected by the outer cylinder 4 and connected to various dental treatment devices. Then, the exposed portion is irradiated with white light 27.

According to the present embodiment, as a lighting mechanism of the dental treatment apparatus, the phosphor layer 2 is provided on the surface of the LED chip 22.
By providing the light emitting portion 3 having a configuration for forming white light by forming the light emitting portion 3, the number of connection terminals conventionally required four becomes two. In addition, since the light-emitting unit 3 does not lose the balance of the emission colors, a current adjustment circuit for adjusting the colors as in the conventional device is not required. This makes it possible to reduce manufacturing costs.

(Embodiment 2) FIG. 5 is a connection circuit diagram of an LED chip showing Embodiment 2 of the present invention. In the present embodiment, a plurality of LED chips 22 are connected in parallel to the connection terminals 12 and 13 of the light emitting unit 3 and disposed. In the same manner as in the first aspect, the phosphor layer 23 is formed to emit white light. Reference numeral 30 in the drawing indicates a current limiting resistor for each LED chip 22.

According to the present embodiment, it is possible to enhance the luminous intensity of the white light emitted to the exposed portion, and it is possible to obtain the same operation and effect as in the first embodiment.

(Embodiment 3) FIG. 6 is a connection circuit diagram of an LED chip showing Embodiment 3 of the present invention. In the present embodiment, a plurality of LED chips 22 are connected in series to the connection terminals 12 and 13 of the light emitting unit 3 and disposed. In the same manner as in the first aspect, the phosphor layer 23 is formed to emit white light.

According to the present embodiment, it is possible to enhance the luminous intensity of the white light emitted to the exposed portion, and it is possible to obtain the same operation and effect as in the first embodiment.

(Embodiment 4) FIG. 7 is a sectional view of a light emitting section according to Embodiment 4 of the present invention. In this embodiment,
In order to collect light emitted from the plurality of LED chips 22 and irradiate the light to the exposure unit, the LED chips 22 are arranged with a predetermined angle between them. Each LED chip 22 is connected to the connection terminal 12 by wire bonding 2.
4a and 24b are electrically connected to the connection terminals 13 by wire bonding 25a and 25b, and the phosphor layer 23 is formed on all the LED chip 22 surfaces in the same manner as in the first embodiment. It is formed to emit white light.

According to the present embodiment, it is possible to enhance the luminous intensity of white light emitted to the exposed portion, and it is possible to obtain the same operation and effect as in the first embodiment.

(Embodiment 5) FIG. 8 is a sectional view of an LED according to Embodiment 5 of the present invention. In this embodiment,
In the first to fourth embodiments, a lens 32 is provided for condensing the light emitted from the LED chip 22 at the tip of the light transmitting portion 11 to the exposure portion.

According to the present embodiment, it is possible to enhance the luminous intensity of the white light emitted to the exposed portion, and it is possible to obtain the same operation and effect as in the first embodiment.

It should be noted that the present invention is not limited to the dental treatment apparatus provided with the illumination mechanism extended in the above-described embodiment.
Japanese Patent Publication No. 7-38846 discloses a dental sonde incorporating an image conductor and a light guide for image transmission,
Alternatively, the present invention can be applied to a dental work handpiece and the like disclosed in Japanese Patent Publication No. 7-49041.

[0027]

According to the present invention, in the case of the conventional full-color LED 23, two terminals are used for connection, as compared with four terminals required for electrical connection of each light emitting element. And a current adjustment circuit for adjusting the color is not required, so that the manufacturing cost can be reduced. According to the second and third aspects, by connecting a plurality of light emitting elements in series or in parallel, it is possible to increase the illuminance of light to the exposure unit. Claim 4 shows a plurality of LEs.
By setting the manual angle in the direction in which the light emission of the D chip is concentrated, it becomes possible to increase the luminous intensity of irradiation on the exposure unit. According to a fifth aspect of the present invention, in the first to fourth aspects, by providing a condensing lens in the light-transmitting portion forming the irradiation portion, it is possible to further enhance the illuminance of the irradiation portion to the exposure portion. The light emitting section has two connection terminals, and can be mounted and dismounted like a general light bulb having two connection terminals. Therefore, replacement when the LED chip is deteriorated is easy,
And it is inexpensive.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a dental treatment apparatus according to a first embodiment of the present invention.

FIG. 2 is a view showing a surface of the terminal member of FIG. 1;

FIG. 3 is an enlarged sectional view of a light emitting unit.

FIG. 4 is an enlarged sectional view of a phosphor forming portion.

FIG. 5 is a circuit diagram of a parallel connection of LED chips according to Embodiment 2 of the present invention.

FIG. 6 is a circuit diagram showing a series connection of LED chips according to Embodiment 3 of the present invention.

FIG. 7 is a cross-sectional view of a light emitting unit according to Embodiment 4 of the present invention.

FIG. 8 is a front view of a light emitting unit according to a fifth embodiment of the present invention.

FIG. 9 is an explanatory view of a dental treatment apparatus provided with a conventional illumination mechanism.

FIG. 10 is an explanatory view of a conventional dental treatment apparatus provided with a lighting mechanism.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Terminal member 2 Rear part of hand-held member 3 Light emitting part 4 Outer cylinder 5 Fitting shaft part 6 Connecting part 7, 8 Female terminal 11 Light transmitting part 16 Cylindrical body 17 Window hole 18 Rear end part 20 One end 21 Depression 22 LED chip 23 Phosphor Layer 24, 25 Wire Bonding 26 LED Chip Light 27 White Light Emission 30 Current Limiting Resistor 32 Lens

Claims (5)

[Claims] 1. A dental treatment apparatus provided with an illumination mechanism for irradiating the inside of an oral cavity in a hand-held member, wherein the illumination mechanism includes a light emitting unit that provides a phosphor layer on an LED chip and emits white light. A dental treatment apparatus provided with an illumination mechanism, characterized in that: 2. A dental treatment apparatus provided with an illumination mechanism according to claim 1, wherein a plurality of said LED chips are connected in parallel. 3. A dental treatment apparatus provided with an illumination mechanism according to claim 1, wherein a plurality of said LED chips are connected in series. 4. A dental treatment apparatus provided with an illumination mechanism according to claim 1, wherein a plurality of said LED chips are manually provided at an angle in a direction in which light emission is concentrated. 5. A dental treatment apparatus provided with an illumination mechanism according to claim 1, wherein a condensing lens is provided in a light transmitting part forming said light emitting part.