JPH0432086Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a small medical light irradiator used for curing composite resin for dental treatment, for example.

[Prior art and its problems]

Photo-curable resins are used for various purposes, one of which is photo-curable composite resins for dental treatment. This involves filling the affected area with a composite resin and curing it by irradiating it with light of a predetermined wavelength, but the medical light irradiator used to cure the resin is placed on a tabletop, etc. In many cases, a light source unit is built into the power supply case along with a power transformer, and a light guide made of bundled optical fibers is connected to the power supply case, and the light guide guides the light to the affected area. Therefore, the light guide inevitably becomes longer, but the light radiation efficiency is low because light is lost in the process of passing through this long light guide.
Further, there are other problems such as the need for a large amount of expensive optical fiber.

For this reason, it is conceivable to hold the light source part in a lightweight and small main body case to which a short light guide is attached, to supply electricity from the power supply case with a relay cord, and to operate the main body case by holding it in your hand. This handy-type compact medical light irradiator has a small main body case, so the light source section and the light emitting section that selectively emits light from the light source section forward in a wavelength-selective manner can be compactly integrated into a narrow space. It is necessary to store it. However, when it is compacted, the inside of the main body case tends to become hot, so
Problems such as deformation of the synthetic resin main body case and damage to wavelength selection filters are likely to occur, and countermeasures are required.

[Purpose of invention]

Therefore, the present invention was designed to compactly pack the light source and light emitting parts inside a lightweight and compact main body case with a short light guide attached, and to eliminate the risk of malfunctions caused by high temperatures inside the main body case. The object of the present invention is to provide a small, handy-type medical light irradiator that is separated from a power supply case.

[Structure of the device and its function]

The compact medical light irradiator of the present invention has a light source section that is energized by a relay cord from the power supply case inside the main body case made of synthetic resin and has a grip section, and the light from this light source section is wavelength-selectively transmitted. A light emitting section for emitting light forward and a cooling air blower are held, a cooling air intake hole is formed in the main body case at a position corresponding to the light source section and the light emitting section, and the light source section is connected to a light source lamp. , a cold mirror surrounding the light source lamp, and a bottomed cylindrical lamp cover covering the cold mirror, and the light emitting section includes a cylindrical front cover connected to the lamp cover and extending forward, and a central cylindrical front cover that is connected to the lamp cover and extends forward. A light shielding plate having an opening in the front cover and covering the opening of the front cover, a heat ray absorption filter covering the opening of the light shielding plate, an ultraviolet ray cut filter placed in front of the heat ray absorption filter, and a heat ray absorption filter and an ultraviolet ray cutting filter. It consists of a light guide made of optical fiber that guides the light transmitted through the filter in a predetermined direction, and the blower sucks cooling air from the cooling air intake hole, and at least part of this cooling air is directed to the light source section. The light source part and the light emitting part are cooled by passing through the inside and being discharged from the end opening of the grip part.

That is, since the light source part, which is energized by the relay cord from the power supply case, is held inside the main body case, it becomes a handy type that is separated from the power supply case, and the optical fiber light guide is shortened. Therefore, the cost is low and the light radiation efficiency is improved. Since the light source part and the light emitting part are organically combined, the structure is compact and the main body case is small.In addition, the air blower can accommodate the light source part and the light emitting part of the main body case. Cooling air is sucked in through the cooling air intake hole formed at the position where the cooling air is cooled, and at least a portion of this cooling air is passed through the interior of the light source to cool the light source and light emitting unit, thereby eliminating problems caused by high temperatures. There is no fear that this will occur.

〔Example〕

The present invention will be specifically described below based on embodiments shown in the drawings.

The main body case 10 is injection molded from synthetic resin and is small and lightweight, but the part housing the light source section 20 and the light emitting section 30 is shaped like a bullet.
It is a handy type in which a grip part 11 is integrally provided below and the side shape is approximately T-shaped. A lid 12 for replacing the light source lamp is attached to the rear of the main body case 10 so as to be openable and closable, and as shown in FIG. Further, as shown in FIG. 3, side cooling air intake holes 14, which are similarly slit-shaped, are formed on the side surface of the main body case 10. In other words, the rear cooling air intake hole 13 and the side cooling air intake hole 14 constitute a cooling air intake hole.
These cooling air intake holes are formed at positions corresponding to the light source section 20 and the light emitting section 30 of the main body case 10.

As shown in FIG. 2, the light source section 20 uses a halogen lamp with a rating of 12V and 75W as the light source lamp 21.
It is surrounded by a cold mirror 22 that absorbs infrared rays. This cold mirror 22 is covered with a cylindrical lamp cover 24 with a bottom. A socket 23 is fixed to the bottom of the lamp cover 24, and a base 25 attached to the top of the cold mirror 22 is fixed to the bottom of the lamp cover 24. It is screwed into the socket 23. This light source lamp 21 is energized by a relay cord 26 extending from a power supply case 50, and is turned on by operating a hand switch 27. When the light source lamp 21 is turned on, a buzzer (not shown) sounds at 10 second intervals so that the irradiation time can be known. A bimetallic thermostat 28 is attached to this hand switch 27, and when the light source lamp 21 is turned on for a long time and the ambient temperature reaches 75°C or higher, the thermostat 28 operates, the hand switch 27 opens, and the light source lamp 21 is turned on. 21 is now turned off. Then, when the ambient temperature drops, it will automatically turn on again. Furthermore, a temperature fuse (not shown) is installed, and if the thermostat 28 does not work due to some abnormality,
A safety circuit is added in which the temperature fuse is blown and the light source lamp 21 is turned off when the ambient temperature exceeds 139°C.

Next, the light emitting section 30 radiates the light from the light source section 20 forward in a wavelength-selective manner.
A cylindrical front cover 31 is connected to the lamp cover 24, and a ventilation hole 42 is bored in the connecting portion. The opening of the front cover 31 is covered with a light shielding plate 32 to prevent light from leaking.
A ventilation hole 43 is also provided in this connection portion.
An opening 33 is bored in the center of the front cover 31, and this opening 33 is covered with a heat ray absorption filter 34, and an ultraviolet cut filter 35 is placed in front of the heat ray absorption filter 34. . The heat ray absorption filter 34 absorbs light with a wavelength of 550 nm or more, and the ultraviolet cut filter 35 has a property of reflecting light with a wavelength of 400 nm or less. 34 and 35 are transmitted through. This is because composite resin for dental treatment is cured by light with a wavelength of 470 nm, but ultraviolet light with a short wavelength of 400 nm or less is harmful to the human body, and light of 550 nm or more inhibits the curing of the resin. It's for a reason. The reason why the ultraviolet cut filter 35 is arranged in front of the heat ray absorption filter 34 is to prevent the ultraviolet cut filter 35 from being damaged by the heat rays.
The light guide 36 is a bundle of about 2000 optical fibers with a diameter of 150 μm, and its rear end is removably inserted into the base 37, and the light guide 36 is inserted into the spring 38 with its rear end facing the ultraviolet cut filter 35. It is being held in a twisted position. Therefore, the light that has passed through both filters 34 and 35 is guided to the light guide 36 and illuminates a narrow range.

A blower 40 with a built-in motor and fan is attached to the grip 11 of the main body case 10. When the blower 40 is activated, the rear cooling air intake hole 1 is opened.
3 and side cooling air intake holes 14 into the main body case 10, and is discharged from the end opening of the grip portion 11.

The power supply case 50 placed on a treatment table or the like is provided with a power switch 52 and has a built-in power supply circuit including a power transformer, a control circuit, etc., but as described above, the relay cord 26 starts to extend and connects to the main body case 10. It is connected to the. A stand 51 is provided upright on the power supply case 50, and when not in use, the main body case 10 is hung on the stand 51, as shown in FIG.

When the power switch 52 is turned on, the blower 40 is activated, and when the hand switch 27 is turned on, the light source lamp 21 is turned on and the light of the aforementioned wavelength is guided to the light guide 36 and filled into the affected area. The resin is irradiated and cured. At this time, the cooling air that has flowed into the main body case 10 from the rear cooling air intake holes 13 and the side cooling air intake holes 14 flows from the ventilation holes 43 to the front cover 31 as shown by the arrows in FIG.
The cold mirror 22, which absorbs heat rays and easily becomes hot, along with the covers 24 and 31
and the heat ray absorption filter 34. Therefore, even though the light source section 20, the light emitting section 30, etc. are compactly incorporated inside the main body case 10, which has a narrow space, these are sufficiently cooled, so that the main body case 10 is not subject to thermal deformation. No problems will occur. Then, the cooling air flows out from the ventilation hole 42 and is discharged to the outside from the end opening of the grip portion 11.

[Effect of idea]

As explained above, the compact medical light irradiator of the present invention has a light source section that is energized from the power supply case through a relay cord inside the main body case, which is small and lightweight, and a light source section that wavelength-selectively transmits light from the light source section forward. Since the device holds the light emitting part that emits light, the handy type body case can be operated close to the patient. Therefore, the optical fiber light guide can be shortened, resulting in lower cost and improved light radiation efficiency. Since the light source section and the light emitting section are organically combined, the structure becomes compact and can be incorporated into a small main body case. In addition, since at least a portion of the cooling air taken in from the cooling air intake hole passes through the inside of the light source, the light source and the light emitting part are effectively cooled, and the synthetic resin body case is prevented from deforming due to heat. It is possible to create a small medical light irradiator without the risk of malfunctions.

[Brief explanation of drawings]

FIG. 1 is a sectional view of an embodiment of the present invention, FIG. 2 is a sectional view of the main part, and FIG. 3 is a side view. 10...Body case, 11...Grip portion, 12...
... Lid, 13 ... Rear cooling air intake hole, 14 ... Side cooling air intake hole, 20 ... Light source section, 21 ... Light source lamp, 22 ... Cold mirror, 24 ... Lamp cover, 26 ... Relay cord , 27... hand switch, 28... thermostat, 30... light emitting section, 31... front cover, 32... light shielding plate, 33...
...Aperture of light shielding plate, 34...Heat ray absorption filter,
35...UV cut filter, 36...Light guide, 37...Base, 38...Spring,
40... Air blower, 42, 43... Ventilation hole, 50...
...Power case, 51...Stand, 52...Power switch.

Claims (1)

[Claim for Utility Model Registration] Inside the main body case made of synthetic resin and having a grip, there is a light source section that is energized by a relay cord from the power supply case, and the light from this light source section is wavelength-selectively emitted forward. a light emitting part for causing the light to emit and a cooling air blower to be held, a cooling air intake hole is formed in the main body case at a position corresponding to the light source part and the light emitting part, and the light source part has a light source lamp and the light source. The lamp includes a cold mirror that surrounds the lamp, and a cylindrical lamp cover with a bottom that covers the cold mirror. It has a light shielding plate that covers the opening of the front cover, a heat ray absorption filter that covers the opening of the light shielding plate, an ultraviolet ray cut filter placed in front of the heat ray absorption filter, and a light that passes through the heat ray absorption filter and the ultraviolet ray cut filter. It consists of an optical fiber light guide that guides the light in a predetermined direction.
Cooling air is sucked in from the cooling air intake hole by the air blower, and at least a part of this cooling air is passed through the inside of the light source section and discharged from the end opening of the grip section, thereby causing the light source section and the light source to cool. A small medical light irradiator characterized by cooling the radiation part.