JPH0626252Y2 - Small light illuminator for medical use - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a compact medical light irradiator used for curing a composite resin for dental treatment, for example.

[Prior art and its problems]

Photo-curing resin is used for various purposes,
As one of them, a photo-curing composite resin is used for dental treatment. In this method, the affected area is filled with a composite resin and irradiated with light having a predetermined wavelength to cure the resin. The small medical light irradiator used to cure this resin is a light source part inside a main body case made of synthetic resin, and a light emitting part for wavelength-selectively radiating light from this light source part forward. Is held. Then, the direct light from the light source lamp of the light source unit and the reflected light from the cold mirror are guided to the heat ray absorption filter and the ultraviolet ray cut filter held by the filter holder of the light emitting unit, and the light transmitted through these filters is It is designed to be guided to the affected area by a light guide in which optical fibers are bundled.

In such a medical small-sized light irradiator, a thick and short light guide is used when the affected part has front teeth, and a thin and long light guide is used when the affected part has back teeth. For this reason,
The light guide is detachably fitted into the opening at the tip of the main body case so that the light guide can be replaced according to the affected area. Here, as shown in FIG. 4, the light source lamp 21
The light flux reflected by the cold mirror 22 that surrounds the
If the conical incident light flux on the incident surface 50a of the light guide 50 is designed so as to match the incident surface 50a of the thick light guide 50, as shown in FIG. 4 (B), Since the distance between the opening edge of the cold mirror 22 and the incident surface 50a is constant when the light guide 50 is replaced with a thin light guide 50, the incident surface 50a and the cone-shaped incident light flux do not have the same size, and other than the incident surface 50a. Since the part is also irradiated, there is a problem that the light efficiency is lowered.

[Purpose of device]

Therefore, the present invention can reliably guide the incident light beam to the incident surface of the light guide without excess or deficiency even if the thickness of the light guide is changed by exchanging the light guide. It is intended to provide.

[Constitution of the device and its action]

According to the configuration of the present invention, a light source part and a light emitting part for radiating light from the light source part forward in a wavelength-selective manner are held inside a main body case made of a synthetic resin, and attached to a front end opening of the main body case. A small medical light irradiator that guides light in a predetermined direction by a light guide made of an optical fiber that is detachably attached to a base, and has one or more attachments for attaching the light guide as an accessory. The inner diameter of the light guide corresponds to the outer diameter of the light guide other than the maximum diameter, and the outer diameter corresponds to the inner diameter of the mouthpiece and is freely attachable to and detachable from the mouthpiece.The light guide of the largest diameter is directly attached to the mouthpiece. If the light guide is thinner than the maximum diameter, its rear end is inserted into the attachment corresponding to the diameter of the light guide, and the attachment is attached to the base. In accordance with the light guide diameter to be used, the position of the incident surface of the light guide is defined, is characterized in that the diameter of the entrance surface coincides with the diameter of the cone-shaped incident light beam at the incident surface.

That is, the position of the incident surface of the light guide is determined according to the diameter of the light guide used, and the smaller the diameter, the closer the incident surface is to the focal point F, and the diameter of the incident surface is the conical incident light flux on the incident surface. To match the diameter of
Regardless of the diameter of the light guide, it is possible to reliably guide the incident light beam to the incident surface of the light guide without excess or deficiency.

Also, when the light guide to be used becomes thinner than the maximum diameter, by attaching an attachment corresponding to the diameter to the base attached to the tip opening of the main body case,
Since the diameter of the incident surface of the light guide and the diameter of the conical incident light beam on the incident surface can be matched, the operation is extremely simple.

〔Example〕

The present invention will be described in detail below with reference to the embodiments shown in the drawings.

In FIG. 1, the main body case 10 is injection molded of synthetic resin and is small and lightweight, but it is a two-part type consisting of a front case 11 and a rear case 12, and is composed of a light source section 20 and a light emitting section 30. The built-in portion is a bullet type, and a handheld type in which a grip portion 14 is integrally provided below the rear case 12. A slit-shaped cooling air suction hole 13 is formed in the front case 11,
When the blower 40 attached to the grip portion 14 operates, cooling air enters through the cooling air suction holes 13 and cools the light source unit 20 and the light emitting unit 30.

The light source unit 20 has, for example, a rating of 24 as the light source lamp 21.
Although a V, 100 W halogen lamp is used, this light source lamp 21 is surrounded by a bowl-shaped cold mirror 22 that absorbs infrared rays. The socket 23 is fixed to the bottom of the rear cover 29, and the base 25 attached to the top of the cold mirror 22 is screwed to the socket 23.
The cold mirror 22 is covered with a lamp cover 24.
The lamp cover 24 has a cylindrical shape with a bottom, an opening 24a for passing light is provided on the front surface, and is fixed to the filter holder 31 and the front case 11 by a screw 32.
Between the opening 24a and the opening edge of the cold mirror 22, a tapered tubular reflecting member 26 having a mirror-finished inner surface is interposed, and the space between the opening 24a and the cold mirror 22 is defined by the reflecting member 26. Is covered. And the light source lamp 21
Is energized by a relay cord (not shown) extending from the power supply case, and the hand switch 27 is operated to light it.
Then, when the light source lamp 21 is turned on, a buzzer (not shown) sounds at intervals of 10 seconds so that the irradiation time can be known. The grip 14 has a built-in thermostat 28, which turns on the light source lamp 21 for a long time and the ambient temperature is 80 ° C.
When it is above, the thermostat 28 works and the hand switch
27 is opened and the light source lamp 21 is turned off.
Furthermore, a thermal fuse (not shown) is attached, and the thermostat 28 does not work due to some abnormality,
A safety circuit is added to turn off the light source lamp 21 when the ambient temperature rises above 139 ° C.

Next, the light radiating section 30 radiates the light passing through the opening 24a of the light cover 24 to the front in a wavelength-selective manner. The filter holder 31 has two heat ray absorption filters.
An ultraviolet cut filter 35 is placed in front of 34 and in front of it. This heat ray absorption filter 34 has a wavelength of 550n.
Absorbing light of m or more, the ultraviolet cut filter 35 has a characteristic of reflecting light having a wavelength of 400 nm or less,
Light having a wavelength of 400 to 550 nm passes through these filters 34 and 35. This is because the composite resin for dental treatment is cured by light with a wavelength of 470 nm.
UV rays with a wavelength shorter than nm are harmful to the human body.
This is because light of 550 nm or more inhibits the curing of the resin.
The reason why the UV cut filter 35 is arranged in front of the heat ray absorption filter 34 is to prevent the UV cut filter 35 from being damaged by heat rays.

The light guide 50 is formed by bundling, for example, about 2000 optical fibers each having a diameter of 150 μm, and its rear end portion is removably inserted into a base 60 having an inner diameter D. The base 60 is the second
As shown in the figure, a spring 62 that is arranged in the tip opening 15 of the main body case 10 and that holds the light guide 50 by tightening it is inserted into the inner surface thereof, and a step 61 that positions the light guide 50 is formed. There is. FIG. 1 shows an example in which the thickest light guide 50 having a diameter of 13φ (= D) is attached. In this case, a light leakage preventing outer cover 51 wound around the outer periphery of the light guide 50 is shown. Is a column with a base of 60
It is positioned in contact with 61. At this time, the conical light flux reflected from the cold mirror 22 is designed to be fully incident on the incident surface 50a without excess or deficiency. Then, the incident light is guided to the light guide 50 and illuminates a narrow range.

Next, in the light guide 50 having an outer diameter smaller than D, as shown in FIG. 3, the outer diameter of the fitting portion 53 is D at the rear end.
The attachment 52 is attached, and the light guide 50 can be freely exchanged according to the affected area. In this attachment 52, an extension 55 extends from the fitting portion 53 via a step 54. Therefore, the fitting portion 53 is attached to the base 60.
And the step 54 is brought into contact with the step 61 of the base 60,
50a approaches the focal point F by the length of the extension 55. Extension 55
Is determined according to the diameter of the light guide 50. When the diameter of the light guide 50 is d ₁ > d ₂ , the extension
The length of 55 is ₁ > ₂ and the smaller the diameter, the longer the extension 55
Is long, and the conical light flux is made to enter the incident planes 50a to the full extent.

When the power switch (not shown) is turned on, the blower 40
Is activated, and then the hand switch 27 is turned on, the light source lamp
21 is turned on, light of the above-mentioned wavelength is guided to the light guide 50, and the resin with which the affected area is filled is irradiated and cured. Then, the light guide 50 is replaced according to the affected area, but even if the diameter of the light guide 50 changes, the light flux always enters the incident surface in just the right amount, so there is no waste of light, and the light efficiency is reduced. do not do.

[Effect of device]

As described above, the small medical light irradiator of the present invention is
By using an attachment that corresponds to the diameter of the light guide, the position of the incident surface of the light guide was determined so that the diameter of the incident surface matches the diameter of the conical incident light beam on the incident surface. Nevertheless, it is possible to reliably guide the incident light beam to the entire incident surface of the light guide without excess or deficiency, and it is possible to provide a small-sized medical light illuminator that is easy to operate and has excellent light efficiency.

[Brief description of drawings]

FIG. 1 is a sectional view of an embodiment of the present invention, FIG. 2 is a sectional view of essential parts, FIG. 3 is an explanatory view of a light guide, and FIG. 4 is an explanatory view of a conventional example. 10 …… Main body case, 11 …… Front case, 12 …… Rear case,
15 …… Tip opening, 20 …… Light source part, 21 …… Light source lamp, 22
...... Cold mirror, 27 ...... Hand switch, 28 ...... Thermostat, 30 ...... Light emitting part, 32 ...... Filter holder, 34 ...... Heat absorption filter, 35 ...... UV cut filter, 50 ...... Light guide, 50a ... incident surface, 52 ...
… Attachment, 53 …… Insertion part, 54 …… Step, 55…
… Extension part, 60 …… clasp, 61 …… step, 62 …… spring

Claims (1)

[Scope of utility model registration request] 1. A light source part and a light emitting part for radiating light from the light source part forward in a wavelength-selective manner are held inside a main body case made of synthetic resin, and attached to a front end opening of the main body case. A small medical light irradiator that guides light in a predetermined direction by an optical fiber light guide that is detachably fitted to a base, and has one or more attachments for attaching the light guide as an accessory, and the attachment. The inside diameter of the light guide corresponds to the outside diameter of the light guide other than the maximum diameter, and the outside diameter corresponds to the inside diameter of the mouthpiece and is freely attachable to and detachable from the mouthpiece.The light guide of the largest diameter is directly attached to the mouthpiece. If the light guide is thinner than the maximum diameter, its rear end is inserted into an attachment corresponding to the diameter of the light guide, and the attachment is fitted to the base. The position of the incident surface of the light guide is determined according to the diameter of the light guide used, and the diameter of the incident surface coincides with the diameter of the conical incident light beam on the incident surface. Light illuminator.