JP2004267437A - Lighting device for dental handpiece - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lighting device for a dental handpiece using a light emitting element miniaturizing the size and improving the luminance. <P>SOLUTION: Reflecting surfaces 20a and 20b reflecting the light other than the front ward light from the light emitting element 10 are provided in the circumference of the light emitting element 10 frontward irradiating the light. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a lighting device for a dental handpiece. Furthermore, the present invention is not limited to use for illumination of a dental handpiece, and is used as a light source for excitation light for fluorescence observation of teeth or a light source for observation of reflected light of teeth, which is incorporated in a dental handpiece. Lighting device.
[0002]
[Prior art]
Conventionally, a halogen lamp or the like is generally used as a light source of a lighting device for a dental handpiece. In recent years, it has been proposed to use a light emitting element.
[0003]
For example, Japanese Patent Application Laid-Open No. 10-337292 discloses a dental handpiece provided with a light emitting diode (LED) on a turbine head. In addition, it is known that the excitation light irradiates the carious part of the tooth with dental caries and the tartar of the dental calculus to emit a specific fluorescent light. A device for observing fluorescence through a filter is known. There are also known devices that irradiate the carious part of the tooth with dental caries and the tartar of the tartar with light, and observe the specific reflected light through a special filter. It is also disclosed in JP-A-5-337142.
[0004]
[Problems to be solved by the invention]
However, the conventionally proposed dental handpiece simply diverts a general-purpose LED device, and in order to obtain a sufficient amount of light as a dental handpiece used in the oral cavity, an LED device with a large output is required. And the number of LED devices needs to be increased. In this case, the size of the dental handpiece is increased, which is not practical.
[0005]
Therefore, a technical problem to be solved by the present invention is to provide a lighting device for a dental handpiece using a light emitting element that can be reduced in size and increased in brightness. This technical problem of miniaturization and high brightness naturally applies to a light source that irradiates excitation light or the like in order to observe the carious part and the tartar part by fluorescence or reflected light.
[0006]
[Means for Solving the Problems]
The present invention provides a lighting device for a dental handpiece having the following configuration to solve the above technical problem.
[0007]
The illuminating device for a dental handpiece includes a reflection surface around a light emitting element that irradiates light forward, and that reflects light from the light emitting element in a direction other than the front toward the front.
[0008]
According to the above configuration, by using light other than the front light from the light emitting element, which has not been conventionally used, together with the forward light, the light from the light emitting element is used as effectively as possible, and the light amount is increased. Can be.
[0009]
Therefore, a lighting device for a dental handpiece using a light emitting element can be reduced in size and increased in brightness.
[0010]
Specifically, it can be configured in various modes as described below.
[0011]
Preferably, the reflection surface is formed at a portion facing at least a side surface of the light emitting element.
[0012]
According to the above configuration, it is possible to reflect the light from the light emitting element at least to the side and collect it in a desired irradiation direction, thereby increasing the amount of light.
[0013]
Note that the reflection surface may be formed not only on the side surface of the light emitting element but also on a portion facing the rear surface of the light emitting element. In this case, it is preferable that the rear surface of the light emitting element is separated from the reflecting surface so as to minimize the interruption of the reflected light by the light emitting element.
[0014]
Preferably, the light emitting device is a light emitting diode or a semiconductor laser.
[0015]
According to the above configuration, the light emitting diode emits a relatively large amount of light radiated to portions other than the front, so that the effect of increasing the amount of light is high. Even a semiconductor laser emits light with a certain spread, so that the amount of light can be increased by reflecting the light forward.
[0016]
Preferably, the light emitting element is a bare chip.
[0017]
In the above configuration, the bare chip cut out from the wafer is smaller than the device in which the chip is housed in the case or the module in which the chip is arranged on the substrate together with other circuit elements and the like. It is easy to reduce the size and increase the brightness.
[0018]
In addition, a bare chip separated individually may be used, or an integrated wafer in which a plurality of bare chips are densely packed may be used. The latter is compact and has high luminance and requires less wiring.
[0019]
Preferably, the bare chip is mounted on a substrate by wireless bonding.
[0020]
In the above configuration, for example, the electrodes of the bare chip and the leads of the substrate are bonded and bonded. In wire bonding using a wire, destruction is relatively likely to occur due to a difference in temperature coefficient during autoclaving, but in wireless bonding in which a bare chip is directly connected to a substrate, such destruction is relatively unlikely to occur.
[0021]
Preferably, it has one reflecting surface. That is, the reflection surface is formed of a single surface.
[0022]
The above configuration is relatively simple compared to the case where there are a plurality of reflection surfaces.
[0023]
Preferably, a lens or a light guide is provided in front of the reflection surface.
[0024]
According to the above configuration, the condensing property can be enhanced by converging the spread irradiation light to substantially one point or making it parallel light by the lens or the light guide.
[0025]
Preferably, a plurality of the light emitting elements are provided. The light-emitting element is provided with the reflective surface for each of two or more groups.
[0026]
According to the above configuration, there are a plurality of reflecting surfaces, and the reflecting surface is provided for each group including one or two or more light emitting elements. Since the reflection surface can be arranged close to the light emitting element, light from the light emitting element is efficiently reflected by the reflection surface, and it is easy to increase the amount of light.
[0027]
Preferably, a lens or a light guide is provided in front of each reflection surface.
[0028]
According to the above configuration, it is possible to enhance the light-collecting property for each light-emitting element group and efficiently illuminate.
[0029]
Preferably, a substrate having a plurality of recesses is provided. The light emitting element is arranged at a bottom of the concave portion. The inner surface of the recess is the reflection surface.
[0030]
According to the above configuration, the light emitting elements can be integrated on the substrate at a high density, and light having a small spread is emitted from the substrate due to the reflection surface of the concave portion. Therefore, it is easy to reduce the size of the lighting device of the dental handpiece.
[0031]
Preferably, the lighting device is arranged at a distal end of the dental handpiece. A part thereof is exposed outside the dental handpiece.
[0032]
In the above configuration, if the illuminating device is arranged at the distal end of the dental handpiece, a mechanism for transmitting light to the distal end is unnecessary. In addition, the lighting device does not need to increase the capacity in anticipation of light transmission loss. Therefore, it is easy to reduce the size of the dental handpiece.
[0033]
Preferably, a cooling unit for cooling the light emitting element is provided.
[0034]
According to the above configuration, by cooling the light emitting element, it is possible to prevent a problem due to heat generation of the light emitting element from occurring. For example, it is possible to prevent a grip portion for holding a dental handpiece and a portion to be inserted into the oral cavity from becoming hot.
[0035]
Preferably, the reflecting surface is formed on a housing that houses the lighting device of the dental handpiece.
[0036]
According to the above configuration, miniaturization is easier than disposing a separate member having a reflection surface. Further, it is also possible to dissipate heat generated on the reflecting surface via the housing of the dental handpiece.
[0037]
Preferably, the lighting device is detachable from the dental handpiece.
[0038]
According to the above configuration, the lighting device can be separated from the dental handpiece during autoclave, which is convenient.
[0039]
From another viewpoint, the present invention provides a dental handpiece provided with the lighting device for a dental handpiece of each of the above configurations.
[0040]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 to 26.
[0041]
First, the lighting device will be described with reference to FIGS.
[0042]
FIG. 1 shows a lighting device 50 according to the first embodiment. The lighting device 50 generally includes the light emitting element 10 and the substrate 20. A concave portion 20x is formed in the substrate 20, and the light emitting element 10 is disposed on a bottom surface 20a of the concave portion 20.
[0043]
The substrate 20 is, for example, a ceramic or glass epoxy substrate, and the concave portion 20x is formed by, for example, cutting or molding with a mold, and then sintering. The light emitting element 10 is, for example, a bare chip of a light emitting diode (LED), and is fixed by a fixing agent, for example, a silver paste 10x, as shown in FIG. The light emitting element 10 is connected to a wiring pattern (not shown) of the substrate 10 by wires 10a and 10b, and emits light when a voltage is applied. The light emitting element 10 and the wires 10a and 10b are protected by a resin mold 20k as necessary. The resin mold 20k also has the effect of increasing the amount of light. For the resin mold 20k, for example, a silicone resin, an epoxy resin, or a resin obtained by appropriately combining a plurality of types can be used.
[0044]
The bottom surface 20a and the side surface 20b of the concave portion 20x are formed so as to have a high reflectance, so that light directed to the side (left and right in the drawing) or rear (down in the drawing) of the light emitting element 10 is efficiently directed forward (upward in the drawing). It is designed to reflect well. The case where the light emitting element 10 is fixed to the concave portion 20x of the substrate 20 shown in FIG. 15A is more compared with the case where the light emitting element 10 is fixed to the plane 20s of the substrate 20 shown in FIG. A lot of light can be collected in front (upward in the figure) of the light emitting element 10.
[0045]
As the substrate 20, a glass epoxy substrate, a ceramic substrate, an alumina substrate, a substrate coated with a metal and the like can be used, and the concave portion 20x can be formed by an appropriate method according to the type of the substrate 20. it can. Further, a bare chip such as a semiconductor laser or organic EL (electroluminescence) can be used for the light emitting element 10. It is preferable that the substrate 20 be made of a material from which heat of the light emitting element 10 is easily released. In particular, when used as a light source such as excitation light for observing fluorescence or reflected light of a carious part or a tartar part described later, light having a wavelength around 480 nm is often used as excitation light or the like. In this case, it is preferable to use a blue LED as the light emitting element.
[0046]
FIG. 2 shows a lighting device 51 of the second embodiment. The lighting device 51 fixes the light emitting element 10 by floating it from the bottom surface 20a of the concave portion 20x of the substrate 10 with a transparent fixing agent, for example, a clear paste 10y. Other configurations are the same as those of the lighting device 50 of FIG. In the lighting device 51, most of the light traveling backward from the light emitting element 10 is reflected forward by the bottom surface 20a, so that the amount of light traveling forward of the light emitting element 10 increases compared to the lighting device 50 of FIG. Light properties can be increased.
[0047]
FIG. 3 shows a lighting device 52 of the third embodiment. The illuminating device 52 includes the ball lens 30 in order to enhance the light collecting property. The ball lens 30 is fixed to the concave portion 20x by a transparent fixing agent filled in the concave portion 20x, for example, a resin mold of an epoxy resin, a silicone resin, or a resin in which a plurality of types are appropriately combined. Since the ball lens 30 has no directionality, it is easy to position the ball lens 30 with respect to the recess 20x and the light emitting element 10 with high accuracy.
[0048]
In the lighting device 52 of FIG. 3, a plurality of recesses 20x are provided in the substrate 20, and the light emitting elements 10 are arranged in each of the recesses 20x. However, only one set of the recess 20x and the light emitting elements 10 may be provided. The wires 10s and 10t connected to the light emitting element 10 are arranged in the recess 20x, but may protrude from the recess 20x.
[0049]
FIG. 4 shows a lighting device 53 according to a fourth embodiment. In the lighting device 53, a plurality of recesses 21x are provided in the substrate 21, and one light emitting element 10 is arranged in each of the recesses 21x. The basic configuration of arranging the light emitting element 10 in the concave portion 21x is the same as the lighting device 50 of FIG.
[0050]
FIG. 5 shows a lighting device 54 of the fourth embodiment. In the lighting device 54, a plurality of concave portions 22x are provided in the curved surface 22s of the substrate 22, and one light emitting element 10 is arranged in each of the concave portions 22x. The basic configuration of disposing the light emitting element 10 in the concave portion 22x is the same as that of the lighting device 50 of FIG. In FIG. 5A, the illustration of the light emitting element 10 and the wires 10a and 10b is omitted.
[0051]
Since the bottom surface 22a of the concave portion 22x is formed so as to be sequentially inclined along the curved surface 22s of the substrate 20, light from each light emitting element 10 arranged in the concave portion 22x can be collected near the center of curvature of the curved surface 22s. .
[0052]
As shown in FIG. 6 and FIG. 7, a plurality of light emitting elements may be arranged in the recess.
[0053]
FIG. 6 shows a lighting device 55 of the sixth embodiment. In the lighting device 55, a plurality of light emitting elements 14 are arranged on the bottom surface 23a of one concave portion 23x formed at the center of the substrate 23. The recess 23x may be filled with a resin mold 23k or the like. As shown in FIG. 6B, the side surface 23b of the concave portion 23x reflects the light largely deviated laterally out of the light from the light emitting element 14 forward by the side surface 23b. Can be enhanced. FIG. 6 shows a case where the light emitting element 14 is a chip LED (an LED device in which a bare chip is housed in a package). Since the chip LED has high directivity, only the side surface 23b can be used as a reflection surface. The side surface 23b is formed to have an elliptical or parabolic cross section, and can irradiate or converge the reflected light in parallel to the front, or can enlarge the reflected light.
[0054]
FIG. 7 shows a lighting device 56 according to a seventh embodiment. In the lighting device 56, the light emitting element 14 is also arranged on the side surface 23b of the concave portion 23x. The lighting device 56 can increase the number of light emitting elements 14 and increase the amount of light.
[0055]
Note that a configuration in which a plurality of the configurations illustrated in FIGS. 6 and 7 are provided on one substrate can be employed.
[0056]
FIG. 8 shows a lighting device 57 of the eighth embodiment. The lighting device 57 is an example in which the light emitting element 14 of the chip LED is arranged on the bottom surface 24 a of the concave portion 24 x of the substrate 24. Although the chip LED 14 has high directivity, even in such a case, light largely deviating from the front can be reflected toward the front by the side surface 24b of the concave portion 24x, so that the amount of light can be increased.
[0057]
FIG. 9 shows a lighting device 58 of the ninth embodiment. The lighting device 58 is an example in the case of a bondingless structure. The light emitting element 16 has a cathode electrode 16a and an anode electrode 16b of solder bumps or gold bumps formed on one surface of a bare chip. Wiring patterns 16s and 16t are formed on the bottom surface 25a of the recess 25x. The electrodes 16a and 16b of the light emitting element 16 are connected to the wiring patterns 16s and 16t by solder reflow by heat or ultrasonic vibration in a pressurized state. A resin may be molded in the recess 25x to protect and fix the light emitting element 16. With the resin mold, it is possible to prevent the electrical wiring portion from being exposed and to be able to cope with autoclave (sterilization treatment in high-temperature steam).
[0058]
Needless to say, all of the above lenses, resins, and others can be combined. One or more light emitting elements may be provided. Any type of light emitting element may be used.
[0059]
As shown in FIGS. 10 to 14, a reflection member may be provided on a substrate.
[0060]
FIG. 10 shows a lighting device 59 of the tenth embodiment. In the illumination device 59, the support member 26 is configured by the substrate 26s and the cup-shaped reflection member 26t.
[0061]
The reflection member 26t has a through hole 26x formed as a concave portion, and the inner surface 26b of the through hole 26x serves as a reflection surface by, for example, finishing the material surface to a mirror surface or forming a reflection film by plating or vapor deposition. It can be used.
[0062]
The reflecting member 26t and the substrate 26s may be formed separately and then joined, or may be formed integrally at the same time. In the case where the through holes 26x are formed separately, processing is easy even if the through holes 26x have a complicated shape. The cross section (the inner surface 26b) of the reflection member 26t is formed as an ellipse or a parabola, and can collimate or condense or expand forward.
[0063]
The surface 26a of the substrate 26s is exposed from one opening of the through hole 26x of the reflection member 26t, and one or more light emitting elements 18 are fixed here.
[0064]
A lens 31 is disposed in the other opening of the through hole 26x of the reflecting member 26t, and enhances the light collecting property in cooperation with the inner surface 26b which is a reflecting surface.
[0065]
However, a configuration in which no lens is provided as in the illumination device 60 of the eleventh embodiment in FIG. 11 may be employed.
[0066]
FIG. 12 shows a lighting device 61 of the twelfth embodiment. In the lighting device 61, one reflection plate material 27t in which a plurality of through holes 27x are formed is joined to a substrate 27s. The lighting device 61 has a reduced number of components and can be simplified in configuration. Also, since there are no many irregularities due to the reflecting member, handling becomes easy.
[0067]
FIG. 13 shows a lighting device 62 of the thirteenth embodiment. In the lighting device 62, one reflecting plate member 28t having one through hole 28x is joined to the substrate 28s. The plurality of light emitting elements 18 are arranged on the surface 28a of the substrate 28s, that is, on the bottom surface of the concave portion.
[0068]
FIG. 14 shows a lighting device 63 according to a fourteenth embodiment. The lighting device 63 further includes a lens 32 at an opening of one reflection plate member 28t in which one through hole 28x is formed. Thereby, as shown by the arrow in FIG.
[0069]
The lighting devices 50 to 63 described above can be provided on various dental handpieces as shown in FIGS. 16 to 26 as they are or after being appropriately modified. An appropriate type of lighting device may be selected. In this case, the lighting device may use only a single-color LED, for example, using only a blue LED, but may appropriately combine red, green, and blue LEDs, or combine a blue LED and a phosphor. Then, those that emit white light are preferable. In particular, if a configuration using only a blue LED as a light source or a configuration that can selectively emit only a blue LED is used, as will be described later, excitation light for observing fluorescence or reflected light of a carious part or a tartar part, etc. It is suitable when it is used as a light source. Although one LED is used in FIGS. 16 and 17, a plurality of LEDs may be integrated. When using as a light source such as excitation light for observing the fluorescence or reflected light of the carious or tartar areas, the surgeon should observe using spectacles equipped with a dedicated fluorescence or reflected light observation filter. Alternatively, an imaging element 240 such as a CCD may be disposed on the handpiece 70a, like the air turbine handpiece 70a shown in FIG. 31 when the air turbine handpiece 70a shown in FIG. Observation may be performed through a captured image via the filter 241. In this case, the light guide end 243a of the image guide 242 is arranged at an easy-to-tooth position of the handpiece 70a via the optical system 245 such as a lens using the image guide 242 as shown in the drawing. The light exit end 244a of the image guide 242 is disposed at the base end of the image guide 242 or another appropriate place, and the image from the exit end 244a of the image guide 242 is provided by the image sensor 240 via the filter 241 provided at the appropriate place. May be imaged, or the image sensor 240, the filter 241, and the optical system 245 may be directly arranged at a position of the handpiece 70a that is easy to face the teeth without using the image guide 242. . In particular, as shown in the handpiece 70a of FIG. 31, the light-receiving end 243a of the image guide 242 or the direct image sensor 240 is preferably disposed adjacent to the light-emitting end face 75a of the light guide 74a. It is also possible to diagnose or treat the affected part while observing the calculus part and the tartar part. In the case of an air turbine handpiece or a micromotor handpiece, it is convenient to cut only a necessary part.
[0070]
16 to 19, 29 and 30 show examples of an air turbine handpiece or a micromotor handpiece.
[0071]
The air turbine handpieces 70 a and 70 b shown in FIG. 16 include a lighting device 73 at the center of the distal end of a base 72 that is attached and detached by a one-touch joint 71. Light guides 74a and 74b are provided in front of the lighting device 73 to transmit light to the turbine head 76 at the tip of the air turbine handpiece, and illuminate the bar 78 from one direction. In the air turbine handpiece 70a shown in FIG. 16A, an emission end face 75a of a light guide 74a is divided into two. The light guide 74b of the air turbine handpiece 70b in FIG. 16B has one elongated end face 75b. The illumination device 73 is provided with one reflection surface 73m. The reflection surface 73m has an opening at the front, and reflects the side light from the illumination device 73 forward.
[0072]
The illuminating device 73 may be provided with a reflective surface 73m shown in FIG. 16 around a conventional LED in which the light emitting element is resin-molded, or may be formed by using a light emitting element having a reflective surface already shown in FIG. The molded lighting device may be used as it is. When the illuminating device shown in FIG. 1 and the like in which the emitting element having the reflective surface is resin-molded is used as it is, the unmolded reflective surface 73m shown in FIG. May be provided. The lighting devices 73s, 73x, 73z, 83, 83a, 87, 87s, 93, 93a described below are all the same.
[0073]
FIG. 29 is a cross-sectional view of a main part of the base 72. A detachable cap 140 is provided at the tip of the base 72, and the lighting device 73 is mounted inside the cap 140. The lighting device 73 includes the reflection surface 73m shown in FIG. The lighting device 73 is urged by the spring 144 when the cap 140 is attached, and the terminal 122 of the lighting device 73 is connected to the electric terminal 132. The electric terminal 132 is connected to an external power supply via the electric wire 130 and supplies power. An air pipe 112 through which air for air supply and cooling flows and a water pipe 116 through which water flows are formed in the base 72, and air and water are supplied to the handpiece body (not shown) from the openings 113 and 118. I do. An air hole 114 is provided in the cap 140, and air flowing around the lighting device 73 from the air pipe 112 passes through the cap 140, and the air cools the lighting device 73. The illumination light from the illumination device 73 passes through the through hole 142 at the tip of the cap 140 and enters the light guide of the handpiece body (not shown).
[0074]
Each of the micromotor handpieces 70s and 70t shown in FIG. 17 includes an illumination device 73s at a position away from the center of the base 72s, and transmits light by light guides 74s and 74t. In the micromotor handpiece 70s of FIG. 17A, the bar 78s is substantially perpendicular to the micromotor handpiece body (contra-angle type), and the light emitting end surface 75s of the light guide 74s is configured in the same manner as in FIG. . In FIG. 17B, the bar 78t is substantially coaxial (straight type) with the micromotor handpiece main body, and the emission end face 75s of the light guide 74t irradiates light near the tip of the bar 78t. I have. In any case, the illumination device 73s is provided with a reflection surface 73m.
[0075]
FIG. 30 is a cross-sectional view of a main part of the base 72s. The center of the tip of the base 72s protrudes, a lighting device 73s is mounted around the center, a terminal 222 of the lighting device 73s is connected to the electric terminal 232, and power is supplied. Air pipes 212 and 213 through which air for air supply and cooling flow, and water pipes 216 and 217 through which water flows are formed in the base 72 s. Supply air and water. An air hole 215 is provided in the air duct 213, and the air supplied from the air duct 213 flows around the lighting device 73s to cool the lighting device 73s. The illumination device 73s includes the reflection surface 73m also illustrated in FIG. Illumination light from the illumination device 73s enters a light guide of a handpiece body (not shown).
[0076]
18 and 19 show a head portion of an air turbine handpiece without a light guide.
[0077]
As shown in FIGS. 18A and 18C, two lighting devices 73x are arranged on the lower surface of the turbine head 76x. As shown in FIG. 18B, one elongated lighting device 73y may be arranged. In each case, the vicinity of the tip of the bar (not shown) is illuminated from one direction.
[0078]
FIG. 19 shows an example in which the vicinity of the tip of the bar is illuminated from multiple directions over the entire circumference so that shadows are hardly formed. A plurality of lighting devices 73z are arranged concentrically around a bar (not shown) on the lower surface of the turbine head 76z. Note that, for example, a single lighting device in which a plurality of light-emitting elements are arranged and integrated on a donut-shaped substrate may be provided. The illumination device 73z is provided with a reflection surface 73m.
[0079]
If the light guides are eliminated and the lighting devices 73x, 73z are disposed on the turbine heads 76x, 76z, a mechanism for transmitting light to the tip end is not required. In addition, the illumination devices 73x and 73z do not need to have a large capacity in anticipation of light transmission loss. Therefore, it is easy to reduce the size of the turbine.
[0080]
20 and 21 show examples of a three-way syringe.
[0081]
The three-way syringe 80 shown in FIG. 20 includes a lighting device 83 in a main body 81, and transmits light to a distal end portion 82 for spraying atomized water by a light guide 84 so as to illuminate in a spraying direction. The emission end face 85 of the light guide 84 is provided in a ring shape around the air and water injection ports provided at the center, as shown in FIG. The lighting device 83 is provided with a reflection surface 83m.
[0082]
FIG. 21 is an example of a three-way syringe without a light guide. A plurality of lighting devices 83a are arranged at the tip 82a. Note that a single lighting device may be provided in which a plurality of light emitting elements are arranged on a donut-shaped substrate and integrated. The illumination device 83a is provided with a reflection surface 83m that guides illumination light forward.
[0083]
22 and 23 show examples of the scaler.
[0084]
The scaler 86 shown in FIG. 22 includes a lighting device 87 in its main body, and a light guide to a distal end portion 86a to which a scaler 89, which is a tool for removing tartar having a built-in ultrasonic vibrator or an air drive source (not shown), is attached. Light is transmitted at 88 to illuminate the vicinity of the tip of the mounted tool 89. The emission end face 88a of the light guide 88 is provided in a ring shape around the central tool mounting portion, as shown in FIG. The illumination device 87 is provided with a reflection surface 87m for guiding illumination light forward.
[0085]
FIG. 23 is an example of a scaler without a light guide. A plurality of lighting devices 87s are arranged at the tip 86b. Each illumination device 87s is provided with a reflection surface 87m for guiding illumination light forward. Note that a single lighting device may be provided in which a plurality of light emitting elements are arranged on a donut-shaped substrate and integrated.
[0086]
24 and 25 show examples of the light probe.
[0087]
The light probe 90 shown in FIG. 24 includes an illumination device 93 in a main body 91, transmits light by a light guide 94, and illuminates from a tip 95 of the light probe 92. The illumination device 93 is provided with a reflection surface 93m for guiding illumination light forward.
[0088]
FIG. 25 is an example of a light probe 90a without a light guide. One illumination device 93a is arranged at the tip end portion 95 of the light probe 92. The illumination device 93a is provided with a reflection surface 93m for guiding illumination light forward.
[0089]
FIG. 26 shows an example of an illuminated dental mirror.
[0090]
The dental mirror 96 includes a mirror 98 and an illuminating device 99 at a distal end portion 97b detachable from a main body 97a. The illumination device 99 irradiates light toward the mirror 98 as indicated by an arrow.
[0091]
FIG. 27 and FIG. 28 are examples in which reflecting surfaces 101 and 102 are formed on a lighting device arranged in a head portion of an air turbine handpiece.
[0092]
FIG. 27 shows an example in which a reflecting surface 101 having a substantially U-shaped cross section is formed on a lighting device 73x in the turbine head 76x shown in FIG. The reflecting surface 101 has an appropriate shape for condensing light near the tip of a bar (not shown), for example, a paraboloid or an ellipsoid. The reflection surface 101 is formed on the housing itself of the turbine head 76x. Thereby, miniaturization is easier than disposing a separate member having a reflection surface. Further, heat generated on the reflection surface 101 can be efficiently radiated via the housing.
[0093]
FIG. 28 illustrates an example in which a ring-shaped reflecting surface 102 having a substantially U-shaped cross section is formed in the illumination device 73z in the turbine head 76z illustrated in FIG. The reflecting surface 102 has an appropriate shape for condensing light near the tip of a bar (not shown), for example, so that the cross section becomes a part of a parabola or ellipse. The reflection surface 102 is formed on a housing of the turbine head 76z. Thereby, miniaturization is easier than disposing a separate member having a reflection surface. Further, heat generated on the reflection surface 102 can be efficiently radiated through the housing.
[0094]
As described above, the lighting device for a dental handpiece includes a reflecting surface around the light emitting element, reflects light that has not been used conventionally to the front, and effectively uses the light, thereby reducing the amount of light. Can be increased. Therefore, the lighting device of the dental handpiece can be reduced in size and increased in brightness.
[0095]
It should be noted that the present invention is not limited to the above-described embodiment, but can be implemented in other various modes.
[0096]
Instead of providing a plurality of lighting devices, for example, one lighting device in which a plurality of light emitting elements are arranged on one substrate may be used.
[0097]
The lighting device of the present invention can be provided in a dental handpiece (for example, a mouth light) other than the above-described embodiment.
[Brief description of the drawings]
FIG. 1 is a plan view and a sectional view of a main part of a lighting device according to a first embodiment of the present invention.
FIG. 2 is a plan view and a cross-sectional view of a main part of a lighting device according to a second embodiment.
FIG. 3 is a plan view and a cross-sectional view of a lighting device according to a third embodiment.
FIG. 4 is a plan view and a sectional view of a lighting device according to a fourth embodiment.
FIG. 5 is a plan view and a sectional view of a lighting device according to a fifth embodiment.
FIG. 6 is a plan view and a sectional view of a lighting device according to a sixth embodiment.
FIG. 7 is a plan view and a cross-sectional view of a lighting device according to a seventh embodiment.
FIG. 8 is a plan view and a cross-sectional view of a lighting device according to an eighth embodiment.
FIG. 9 is a plan view and a cross-sectional view of a lighting device according to a ninth embodiment.
FIG. 10 is a perspective view and a sectional view of a lighting device according to a tenth embodiment.
FIGS. 11A and 11B are a perspective view and a sectional view of an illumination device according to an eleventh embodiment.
FIG. 12 is a perspective view and a sectional view of a lighting device according to a twelfth embodiment.
FIG. 13 is a perspective view and a sectional view of a lighting device according to a thirteenth embodiment.
FIG. 14 is a perspective view and a sectional view of a lighting device according to a fourteenth embodiment.
FIG. 15 is an explanatory diagram of the progress of light from a light emitting element.
FIG. 16 is a configuration diagram of an air turbine handpiece.
FIG. 17 is a configuration diagram of a micromotor handpiece.
FIG. 18 is a configuration diagram of an air turbine handpiece.
FIG. 19 is a configuration diagram of an air turbine handpiece.
FIG. 20 is a configuration diagram of a three-way syringe.
FIG. 21 is a configuration diagram of a three-way syringe.
FIG. 22 is a configuration diagram of a scaler.
FIG. 23 is a configuration diagram of a scaler.
FIG. 24 is a configuration diagram of a light probe.
FIG. 25 is a configuration diagram of a light probe.
FIG. 26 is a configuration diagram of an illuminated dental mirror.
FIG. 27 is a configuration diagram of an air turbine handpiece.
FIG. 28 is a configuration diagram of an air turbine handpiece.
FIG. 29 is a sectional view of a main part of the air turbine handpiece.
FIG. 30 is a sectional view of a main part of the micromotor handpiece.
FIG. 31 is a configuration diagram of an air turbine handpiece.
[Explanation of symbols]
10,14,16,18 light emitting device
20-25 substrate (support)
20a-25a Bottom (reflective surface)
20b ~ 25b Side (reflective surface)
20x ~ 25x recess
26,26 ', 27,28 Support
26b, 26b ', 27b, 28b Inner surface (reflective surface)
26s, 26s', 27s, 28s Substrate
26t, 26t ', 27t, 28t Reflecting member
26x, 26x ', 27x, 28x Through-hole (recess)
29 substrate
29x recess
30 Ball lens (optical element)
31, 32 lens (optical element)
40-45 extension
40a-45a opening
40b-45b reflective surface
40x-45x space
50-66 Lighting device
70a, 70b Air turbine handpiece (Dental handpiece)
70s, 70t Micromotor handpiece (Dental handpiece)
73, 73s, 73x, 73z Lighting device
74a, 74b, 74s, 74t Light guide
80 Three Way Syringe (Dental Handpiece)
83,83a Lighting device
84 Light Guide
86 Scaler (Dental Handpiece)
87,87s lighting system
88 Light Guide
90,90a Probe (Dental handpiece)
93,93a Lighting device
94 Light Guide
96 Dental Mirror (Dental Handpiece)
99 Lighting equipment

Claims (15)

An illumination device for a dental handpiece, comprising: a light-emitting element that irradiates light forward and a reflection surface that reflects light from the light-emitting element in a direction other than forward from the light-emitting element toward the front. The lighting device for a dental handpiece according to claim 1, wherein the reflection surface is formed at least in a portion facing the side surface of the light emitting element. 3. The lighting device for a dental handpiece according to claim 1, wherein the light emitting element is a light emitting diode or a semiconductor laser. The lighting device for a dental handpiece according to claim 1, wherein the light emitting element is a bare chip. The lighting device for a dental handpiece according to claim 4, wherein the bare chip is mounted on the substrate by wireless bonding. The lighting device for a dental handpiece according to any one of claims 1 to 5, wherein the reflection surface is a single surface. The lighting device for a dental handpiece according to any one of claims 1 to 6, wherein a lens or a light guide is provided in front of the reflection surface. The dental hand according to any one of claims 1 to 5, further comprising a plurality of the light emitting elements, wherein each of the light emitting elements is divided into two or more groups and the reflective surface is provided. Piece lighting device. The lighting device for a dental handpiece according to claim 8, wherein a lens or a light guide is provided in front of each of the reflection surfaces. Comprising a substrate having a plurality of recesses,
The light emitting element is arranged at the bottom of the recess,
10. The lighting device for a dental handpiece according to claim 8, wherein an inner surface of the concave portion is the reflection surface. The lighting device according to any one of claims 1 to 10, wherein the lighting device is disposed at a distal end portion of the dental handpiece, and a part thereof is exposed to the outside of the dental handpiece. Lighting device for dental handpiece. The lighting device for a dental handpiece according to any one of claims 1 to 11, further comprising cooling means for cooling the light emitting element. The lighting device for a dental handpiece according to any one of claims 1 to 12, wherein the reflection surface is formed on a housing of the dental handpiece. The lighting device for a dental handpiece according to any one of claims 1 to 13, wherein the lighting device is detachable from the dental handpiece. A dental handpiece comprising the lighting device for a dental handpiece according to claim 1.

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