JP5769102B2 - Medical lighting device - Google Patents

Description

  The present invention relates to a medical lighting device in which a plurality of LEDs are arranged in a ring shape and light from all the LEDs is condensed at a preset distance.

  As a conventional lighting device using an LED as a light source, there is an invention disclosed in Japanese Patent Application Laid-Open No. 2007-88377. The present invention attaches to a pyramid-shaped light guide made of a material such as glass capable of transmitting light on the light emitting surface of the LED, and is configured so that the light from the LED becomes rectangular by the light guide. The light was expanded and irradiated through the objective lens.

JP 2007-88377 A

  By the way, in the invention disclosed in the above-mentioned patent document, two LEDs are arranged in parallel and a plurality of LEDs are arranged in the lateral direction. In such an LED arrangement, the irradiation distance is disclosed. There is a problem in that the brightness is small because the overlap in the pattern center portion due to the change of the pattern does not always overlap.

  The present invention is intended to solve the above-described problems, and its object is to arrange a plurality of LEDs in a concentric ring shape so that light from all the LEDs is in a rectangular shape at a predetermined distance. Since all the patterns overlap at the center of the pattern even if the irradiation pattern changes at the actual usage distance, the illuminance at the center of the pattern can be secured stably, and the brightness that illuminates the patient's mouth Therefore, it is easy to treat, and since no light leaks to the outer periphery of the rectangular shape, a medical lighting device that does not give glare to the patient is provided.

Medical lighting apparatus of the present invention intended to St achieve the object described above, a-ring-shaped base, a plurality of light source means a light source LED mounted side by side in an annular shape along the base board And a hollow cover that covers the light source means, and is formed so that light from the light source means is emitted from an opening portion opened in front of the cover, and light from all light source means is preliminarily formed. The outer peripheral part of the base is inclined from the inner peripheral part in the light condensing direction so as to form a pattern for condensing light at a set distance, and the light source means is attached close to the LED and the irradiation surface of the LED. And a light guide that converges and emits light from the LED in a rectangular shape, and a convex lens attached to the back surface of the opening of the cover via a gap between the light guide and a radiation surface of the light guide. And the lens Apart made closer than the focal length of the lens, by arranging the lens to definite position relative to the LED, characterized in that to reduce the illuminance level difference blur the edges of the focused pattern.

In the medical lighting device of the present invention, an opening that transmits light is formed between the lens and the opening of the cover on a filter plate formed of a material that cuts a wavelength at which a photocurable resin reacts. The filter plate is rotatably attached to the cover, and a portion excluding the opening of the filter plate is positioned in the opening of the cover when using a photo-curing resin.

  In the present invention, as described above, since the light from all the light source means is a pattern in which the light from all the light source means is collected at one preset distance, the luminance in this pattern is high. Since the patient's mouth becomes bright, the treatment by the practitioner can be performed in a bright atmosphere.

  In addition, the light guide radiation surface that converges and emits light from the LED in a rectangular shape and the convex lens attached to the back surface of the opening of the cover through a gap are emitted from all light source means. The light becomes a rectangular pattern and irradiates the patient's mouth in a rectangular shape, so that the patient is not dazzled.

  In addition, the pattern overlap when the irradiation distance changes is stable and bright at the actual usage distance, and in the part where the overlap has shifted, the edge of the collected pattern is blurred by narrowing the distance between the light guide and the lens, and the illuminance By reducing the level difference, the illuminance change in the pattern is gradual, and the load on the practitioner's eyes can be reduced.

  In addition, the filter plate that is rotatable with respect to the cover is formed with a filter portion that cuts the wavelength at which the photocurable resin reacts and an opening that transmits light, so that the treatment when handling the photocurable resin is performed. Rotating the filter plate to radiate light from the light source means through the filter portion can prevent the curing of the photocurable resin, and in the treatment when the photocurable resin is not handled, By allowing the light from the light source means to be transmitted through the opening of the plate, the treatment can be performed with normal light.

1 is a perspective view of a medical lighting device according to the present invention. It is sectional drawing of FIG. It is a perspective view which shows the state condensed at the rectangular shape with the light from all LED in the position preset from the light source means. It is a diagram which shows the condensing state in the position near a light source means from the preset condensing position. It is a diagram which shows the condensing state in the position near a light source means rather than the condensing position set in FIG. 6 is a graph showing relative illuminance in the X-axis direction and the Y-axis direction when there is no “blurring” at the irradiation position in FIG. 5. 6 is a graph showing relative illuminance in the X-axis direction and the Y-axis direction when the light guide and the lens are brought close to each other at the irradiation position in FIG. It is a perspective view of the structure which rotates the filter which cuts the wavelength which photocurable resin reacts from the light irradiated from LED. It is sectional drawing of FIG. It is a front view of a filter.

An embodiment of the medical lighting device according to the present invention will be described below with reference to FIGS.
Reference numeral 1 denotes an illuminating device main body that illuminates the patient's mouth by being attached to a known arm device (not shown) that moves closer to or away from the face of the patient sitting on the treatment chair, and is a ring shape for attachment to the arm. The base 1, a hollow cover 2 having the same size as the base 1 covering the front side of the base 1, and a plurality of (in the figure, 10) light source means 3 housed in the cover 2 It is made up of. An opening 21 is formed on the surface of the cover 2, and a transparent plate 4 for dust prevention is attached to the opening 21.

  Each of the light source means 3 includes an LED 31 that emits white light, a substrate 32 to which the LED 31 is attached, a cylindrical body 33 that is formed of an impermeable material with one end fixed to the substrate 32, and one end that is A light guide 34 that is close to the irradiation surface of the LED 31 and is made of a transparent material such as glass or acrylic resin, the other end of which is supported by the cylindrical body 33, and uniformizing the luminance and color of the incident light; The light guide 34 includes a support plate 35 for fixing the light guide 34 to the cylindrical body 33 and a convex lens 36 which is fixed above the cylindrical body 33 and enlarges and projects light from the light guide 34.

  Then, the light from the LED 31 is guided and condensed by the light guide 34, enters the lens 36, and is emitted from the lens 36 as a rectangular pattern. Reference numeral 4 denotes a dust-proof transparent plate fixed to the surface of the opening 21 of the cover 2.

  In the irradiation apparatus of the present invention configured as described above, the emission side tip of the lens 36 is a ring in accordance with the position A (see FIG. 3) where the radiated light from the light guide 34 in all the light source means 3 is set in advance. Each light source means 3 is set so that all the LEDs 31 arranged in a shape are arranged in a diameter of a circle connecting the centers of the LEDs 31. Thus, by arranging the light source means 3, the radiated light from the irradiation device is irradiated as a collective light of all the LEDs 31 in a high luminance state, and therefore the treatment by the practitioner can be performed in a bright atmosphere. It can be carried out.

  Then, the position where the irradiation device approaches the patient's mouth from the position Amm shown in FIG. 3 where the light from all the LEDs 31 gathers, and the area where the light from all the LEDs 31 is condensed becomes smaller and shifts in the vertical and horizontal directions. (See FIG. 4). Furthermore, the distance C approaching the patient's mouth and the area where the light from all the LEDs 31 is collected can be further reduced and the illuminance step caused by the deviation in the vertical and horizontal directions can be eliminated by blurring the edges of each pattern (see FIG. 5).

Further, when an experiment is performed and the lens 36 is moved closer to the light guide 34 than the focal length of the lens 36 so that the distance between the light guide 34 and the lens 36 is closer, the edge of the pattern in which the light from all the LEDs 31 is collected. The illuminance step was reduced and the load on the practitioner's eyes was reduced.

  As shown in FIG. 6, the illuminance distribution at the center of the illumination pattern when the distance between the light guide 34 and the lens 36 is set so that the pattern becomes a clear rectangular shape at the distance of the position A, as shown in FIG. In the graph shown in FIG. 7, uneven steps are formed on the inclined surface line. On the other hand, the illuminance distribution when the pattern is blurred by slightly reducing the distance between the light guide 34 and the lens 36 is shown in FIG. This is clear from the fact that almost no step was formed on the inclined line in the axial graph.

  When using a photocurable resin for the treatment using the illumination device described above, the photocurable resin reacts when irradiated with light from the illumination device of the surgical light that illuminates the oral cavity, and is intended during treatment. Do not cure. Therefore, a filter device that prevents the photocurable resin from reacting by arranging a filter that cuts the wavelength to which the photocurable resin reacts in front of the lighting device will be described with reference to FIGS. In addition, the same code | symbol as above-mentioned Example shows the same member, and abbreviate | omits description.

  On the front surface of the light source means 3, a filter plate 5 for cutting a wavelength at which the photocurable resin reacts, and a ring-shaped filter plate 5 having an opening 51 formed in the filter plate 5 are rotatably mounted. On the outer periphery of the filter plate 5, a projecting piece 52 guided in a guide hole 23 formed on the outer periphery of the cover 2 is integrally formed.

  In the filter device configured as described above, the filter 52 is operated by operating the protruding pieces 52 of the filter plate 5 in the treatment other than the filling of the photocurable resin, such as the treatment using the handpiece. When the filter plate 5 is rotated to a position where the opening 51 of the plate 5 coincides with the opening 21 of the cover 2, the light from the light source means 3 is emitted through the opening 51 of the filter plate 5, so that it is normal light. It becomes possible to perform treatment with the illumination of.

  Then, when the photocurable resin is filled, when the projecting piece 52 is operated to rotate the filter plate 5 to a position where it covers the opening 21 of the cover 2, the light from the light source means 3 is irradiated through the filter plate 5. Therefore, since the wavelength which photocurable resin reacts is cut, hardening of photocurable resin is suppressed.

In the above-described embodiment, the filter plate 5 is disposed between the transparent plate 4 attached to the opening 21 of the cover 2 and the lens 36. However, the filter plate 5 photocures light from the LED 31. Since the purpose is to cut the wavelength at which the reactive resin reacts, it may be disposed between the light guide 34 and the lens 36, although not shown.

DESCRIPTION OF SYMBOLS 1 Base 2 Cover 21 Opening part 3 Light source means 31 LED
32 substrate 33 cylinder 34 light guide 35 support plate
36 lens 4 transparent plate 5 filter plate 51 opening

Claims (2)

A ring-shaped base;
A plurality of light source means using LEDs mounted in a ring shape along the base as light sources;
A hollow cover covering the light source means,
The light from the light source means is formed so as to be emitted from an opening opened on the front surface of the cover, and the light from all the light source means has a pattern for condensing at one preset distance. Inclining the outer periphery of the base in the light collecting direction from the inner periphery,
The light source means is mounted in the vicinity of the LED, an irradiation surface of the LED, a light guide that converges and irradiates light from the LED in a rectangular shape, and the cover through the light emission surface and the gap And a convex lens attached to the back surface of the opening,
The distance between the light guide and the lens is made closer than the focal length of the lens, and the lens is arranged at a fixed position with respect to the LED, thereby blurring the edge of the collected pattern and reducing the illuminance step. A medical lighting device characterized by that. An opening for transmitting light is formed on a filter plate made of a material that cuts a wavelength at which a photocurable resin reacts between the lens and the opening of the cover, and the filter plate is attached to the cover. 2. The medical lighting device according to claim 1, wherein when the photocurable resin is used, the portion of the filter plate excluding the opening is positioned when the photocurable resin is used.

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