JP2018006034A - Light fitting - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a light fitting which can make a light distribution angle small while inhibiting increase of the size.SOLUTION: A light fitting 1 includes: a light emitting part 21b; a first reflection member 41; and a second reflection member 42. The first reflection member 41 reflects light which is included in light emitted by the light emitting part 21b and enters into the first reflection member 41 without passing through the second reflection member 42. At least a part of the second reflection member 42 is enclosed by the first reflection member 41. The second reflection member 42 reflects light which is included in the light emitted by the light emitting part 21b and enters into the second reflection member 42 without passing through the first reflection member 41.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a lighting fixture.

  The lighting fixture described in Patent Document 1 includes a light emitting unit and a reflecting member. The reflecting member reflects the light emitted from the light emitting unit. The light distribution can be adjusted by changing the length, diameter, and / or shape of the reflecting surface of the reflecting member. The length of the reflecting member indicates the length along the optical axis. The diameter of the reflecting member indicates the maximum diameter of the reflecting member. The reflective surface shape indicates the shape of a surface that reflects light. The shape of the surface is, for example, an ellipse, a paraboloid, or an aspherical surface.

JP, 2015-191762, A

  However, in the lighting fixture described in Patent Document 1, in order to reduce the light distribution angle, it is required to increase the size of the reflecting member. The light distribution angle is represented by, for example, a 1/2 illumination angle or a 1/2 beam angle. The size of the reflecting member includes the length and / or diameter of the reflecting member. Increasing the size of the reflecting member increases the size of the lighting fixture. The size of the luminaire includes the length and / or width of the luminaire. The length of the luminaire indicates the length along the optical axis. The width | variety of a lighting fixture shows the width | variety along the direction orthogonal to an optical axis.

  For example, in order to reduce the light distribution angle, at least one of a correspondence to increase the length of the reflection member, a correspondence to increase the diameter of the reflection member, and a correspondence to change the reflection surface shape is required. In particular, the length of the reflecting member is an important factor for reducing the light distribution angle. This is because as the length of the reflecting member is increased, the light traveling along a large number of optical paths can be reflected, and the light can be prevented from spreading. However, the length of the lighting apparatus increases as the length of the reflecting member increases. Moreover, the width | variety of a lighting fixture expands, so that the diameter of a reflection member is expanded.

  This invention is made | formed in view of the said subject, The objective is to provide the lighting fixture which can make a light distribution angle small, suppressing the expansion of a size.

  The lighting fixture disclosed in the present application includes a light emitting unit, a first reflecting member, and a second reflecting member. The first reflecting member reflects light incident on the first reflecting member without passing through the second reflecting member out of the light emitted from the light emitting unit. At least a part of the second reflecting member is surrounded by the first reflecting member. The second reflecting member reflects light incident on the second reflecting member without passing through the first reflecting member out of the light emitted from the light emitting unit.

  In the lighting fixture disclosed in the present application, it is preferable that the light emitting unit includes a first region and a second region surrounded by the first region. It is preferable that the tip of the second reflecting member is opposed to the second region and is separated from the light emitting unit.

  In the lighting fixture disclosed in the present application, it is preferable that the second reflecting member has an outer surface, an inner surface, and a through path. The penetration path is preferably surrounded by the inner surface and penetrates the second reflecting member.

  In the lighting fixture disclosed in the present application, it is preferable that the second reflecting member has a cylindrical shape.

  It is preferable that the lighting fixture disclosed in the present application further includes a first positioning member that positions the second reflecting member with respect to the light emitting unit. It is preferable that the first reflecting member has an incident opening through which the light emitted from the light emitting unit is incident and an emitting opening through which the light incident on the incident opening is emitted. The first positioning member is preferably disposed on the exit opening side of the entrance opening and the exit opening.

  It is preferable that the lighting fixture disclosed in the present application further includes a second positioning member that positions the second reflecting member with respect to the light emitting unit. The second positioning member is preferably arranged on the incident opening side of the incident opening and the exit opening.

  According to the present invention, it is possible to reduce a light distribution angle while suppressing an increase in size.

It is a side view which shows the lighting fixture which concerns on embodiment of this invention. It is sectional drawing which shows the lamp main body of the lighting fixture which concerns on embodiment. It is a perspective view which shows the lamp main body of the lighting fixture which concerns on embodiment. (A) It is a top view which shows the light source part of the lighting fixture which concerns on embodiment. (B) It is an expanded sectional view which shows a part of lamp body of the lighting fixture which concerns on embodiment. It is sectional drawing which shows the path | route of the light radiate | emitted from the light emission part of the lighting fixture which concerns on embodiment. It is sectional drawing which shows a part of lamp body of the lighting fixture which concerns on the modification of embodiment.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the drawings, the same or corresponding parts are denoted by the same reference numerals and description thereof is not repeated. Further, in this specification, the X axis and the Y axis of the three-dimensional orthogonal coordinate system are parallel to the horizontal line, and the Z axis is parallel to the vertical line. The positive direction of the Z axis is the opposite direction to the gravity direction and indicates the upward direction, and the negative direction of the Z axis is the gravity direction and indicates the downward direction.

  FIG. 1 is a side view showing a lighting fixture 1 according to an embodiment of the present invention. As shown in FIG. 1, the lighting fixture 1 is a plug-type spotlight, for example. The luminaire 1 includes a lamp body 3, an arm 5, a plug unit 7, and a cord 9. The arm 5 holds the lamp body 3. The arm 5 is connected to the plug unit 7 so as to be rotatable around the axis A1. Therefore, the lamp body 3 can rotate around the axis A1.

  The plug unit 7 includes a power supply unit 8 that supplies an internal power supply voltage to the lamp body 3. The cord 9 connected to the power supply unit 8 is pulled out from the plug unit 7 and connected to the lamp body 3. The code 9 supplies the internal power supply voltage generated by the power supply unit 8 to the lamp body 3. The plug unit 7 is attached to the wiring duct 11. The power supply unit 8 is supplied with an external power supply voltage from the wiring duct 11. The power supply unit 8 generates an internal power supply voltage based on the external power supply voltage. The wiring duct 11 has a long shape and is fixed to a ceiling wall 13 such as a ceiling.

  The lamp body 3 is rotatable around the axis A2. When the lamp body 3 is rotated and the posture of the lamp body 3 is determined, the arm 5 holds the lamp body 3 so that the posture of the lamp body 3 is maintained constant. The lamp body 3 includes a light source unit 21, a heat sink 23, and an exterior member 25.

  The light source unit 21 emits light. The heat sink 23 dissipates heat generated by the light source unit 21. The exterior member 25 is substantially cylindrical and has an opening 27, a notch 29, and an opening 31. Each of the opening 27 and the opening 31 is substantially circular. The exterior member 25 covers a part of the heat sink 23. The arm 5 holds a portion of the heat sink 23 that is exposed from the notch 29.

  Next, the lamp body 3 will be described with reference to FIGS. 2 and 3. FIG. 2 is a cross-sectional view showing the lamp body 3. FIG. 3 is a perspective view showing the lamp body 3. As shown in FIGS. 2 and 3, the light source unit 21 is attached to the lamp body 3. The light source unit 21 includes a substrate 21a and a light emitting unit 21b. The light emitting unit 21b is mounted on the mounting surface of the substrate 21a. The light emitting unit 21b emits light.

  The lamp body 3 further includes a first reflecting member 41, a second reflecting member 42, and a cover member 43 (first positioning member). In FIG. 3, the cover member 43 is omitted for convenience of explanation.

  The cover member 43 has a substantially disk shape and is attached to the lamp body 3. The cover member 43 faces the opening 27 and is disposed at a position closer to the light emitting part 21b than the opening 27 is. The cover member 43 allows the light emitted from the light emitting unit 21b to pass therethrough. Specifically, the cover member 43 directly receives the light emitted from the light emitting unit 21b and allows the light to pass therethrough. The cover member 43 receives the light reflected by the first reflecting member 41 and allows the light to pass therethrough. Further, the cover member 43 receives the light reflected by the second reflecting member 42 and allows the light to pass therethrough.

  The cover member 43 is, for example, transparent or translucent, and transmits light emitted from the light emitting unit 21b. However, the cover member 43 may diffuse and emit the light emitted from the light emitting unit 21b. For example, the cover member 43 is formed by molding a resin mixed with a light diffusing material into a substantially disk shape. For example, the cover member 43 is formed by providing minute irregularities on the light emitting surface or light incident surface of a transparent or translucent substantially disk-shaped member. For example, the cover member 43 may have a color like milky white. Furthermore, the cover member 43 is not limited to a substantially disk shape, and may have an arbitrary shape. For example, the cover member 43 may have a shape and material having a lens function. The lens function is a function that refracts light and diverges or converges light.

  The first reflecting member 41 is accommodated in the lamp body 3 and attached to the lamp body 3. The first reflecting member 41 is disposed between the light emitting unit 21 b and the cover member 43. The first reflecting member 41 may be described as light incident on the first reflecting member 41 without passing through the second reflecting member 42 (hereinafter referred to as “light LT1”) out of the light emitted from the light emitting unit 21b. .) Reflect. The first reflecting member 41 reflects a part of the light reflected by the second reflecting member 42.

  Specifically, the first reflecting member 41 has an entrance opening 44, an exit opening 46, and an inner surface 48. The light emitting part 21 b is located outside the first reflecting member 41 and faces the incident opening 44. Then, the light emitted from the light emitting unit 21 b enters the incident opening 44. The light that has entered the entrance opening 44 exits from the exit opening 46. Each of the entrance opening 44 and the exit opening 46 has a substantially circular shape. The cover member 43 is disposed on the exit opening 46 side of the entrance opening 44 and the exit opening 46. In the present embodiment, the cover member 43 is disposed so as to close the emission opening 46.

  The inner surface 48 of the first reflecting member 41 reflects the light LT1 incident on the inner surface 48. That is, the inner surface 48 functions as a reflecting surface. The inner diameter of the inner surface 48 gradually increases from the entrance opening 44 toward the exit opening 46. The inner surface 48 is formed of, for example, a paraboloid, an ellipsoid, or an aspheric surface.

  The second reflecting member 42 is accommodated in the lamp body 3 and is disposed between the light emitting unit 21 b and the cover member 43. In addition, at least a part of the second reflecting member 42 is accommodated in the first reflecting member 41 and surrounded by the first reflecting member 41. The second reflecting member 42 may be described as light that enters the second reflecting member 42 without passing through the first reflecting member 41 (hereinafter referred to as “light LT2”) out of the light emitted from the light emitting portion 21b. .) Reflect. The second reflecting member 42 reflects a part of the light reflected by the first reflecting member 41.

  Specifically, the second reflecting member 42 is substantially cylindrical. In the present embodiment, the second reflecting member 42 is substantially cylindrical. The length of the second reflecting member 42 is longer than the length of the first reflecting member 41. In this specification, unless otherwise specified, the length indicates a length along the optical axis LA. The width indicates a width along a direction TD orthogonal to the optical axis LA. The optical axis LA is the optical axis of the light emitting unit 21b. The optical axis LA is orthogonal to the light emitting part 21b and passes through the center of the light emitting part 21b. The central axis CA of the second reflecting member 42 substantially coincides with the optical axis LA.

  The tip E1 of the second reflecting member 42 faces the light emitting part 21b. The tip E <b> 1 of the second reflecting member 42 is located on the incident opening 44 side in both longitudinal ends of the second reflecting member 42. On the other hand, the base end E <b> 2 of the second reflecting member 42 is located on the exit opening 46 side of both ends of the second reflecting member 42 in the longitudinal direction. A base end E <b> 2 of the second reflecting member 42 is attached to the cover member 43. In other words, the cover member 43 positions the second reflecting member 42 with respect to the light emitting portion 21b. Specifically, the cover member 43 positions the second reflecting member 42 so that the optical axis LA of the light emitting portion 21b and the central axis CA of the second reflecting member 42 coincide. Further, the cover member 43 and the base end E2 of the second reflecting member 42 are joined by, for example, an adhesive.

  The second reflecting member 42 has an outer peripheral surface 50 (outer surface), an inner peripheral surface 52 (inner surface), and a through passage 54. A part of the light emitted from the light emitting portion 21b is directly incident on the outer peripheral surface 50. A part of the light reflected by the inner surface 48 of the first reflecting member 41 is incident on the outer peripheral surface 50. The outer peripheral surface 50 reflects light incident on the outer peripheral surface 50. That is, the outer peripheral surface 50 functions as a reflecting surface. Further, the inner surface 48 of the first reflecting member 41 reflects a part of the light reflected by the outer peripheral surface 50.

  On the other hand, the inner peripheral surface 52 of the second reflecting member 42 reflects the light LT2 incident on the inner peripheral surface 52 from the tip E1 of the second reflecting member 42. The through passage 54 is surrounded by the inner peripheral surface 52 and penetrates the second reflecting member 42. Accordingly, the light LT2 is emitted from the base end E2 of the second reflecting member 42 through the through-passage 54 while being reflected by the inner peripheral surface 52.

  The inner surface 48 of the first reflecting member 41 and the outer peripheral surface 50 and the inner peripheral surface 52 of the second reflecting member 42 are white painted, silver painted, or glossy metal plated in order to reflect light efficiently. It is preferable that the reflection processing is applied. The inner surface 48, the outer peripheral surface 50, and the inner peripheral surface 52 are specularly reflected, for example. Moreover, the material of the 1st reflection member 41 and the 2nd reflection member 42 may have a color with high light reflectivity, such as white or silver.

  As described above, according to the present embodiment described with reference to FIGS. 2 and 3, the light distribution angle of the lamp body 3 can be set while suppressing the increase in the size (for example, the length and / or width) of the lamp body 3. Can be small.

  Specifically, the first reflecting member 41 reflects the light LT1. In addition, the second reflecting member 42 reflects the light LT2. In other words, the first reflection member 41 and the second reflection member 42 can share the light distribution control of the light emitted from the light emitting unit 21b.

  Therefore, it is possible to suppress the light emitted from the lamp body 3 from spreading by both the first reflecting member 41 and the second reflecting member 42. That is, it is not required that only the first reflecting member 41 reflects light traveling on a large number of optical paths, and it is not required that only the first reflecting member 41 suppress the spread of light emitted from the lamp body 3. In addition, at least a part of the second reflecting member 42 is surrounded by the first reflecting member 41.

  As a result, an increase in the length of the first reflecting member 41 can be suppressed. In addition, by the first reflecting member 41 and the second reflecting member 42, the light distribution angle of the light emitted from the light emitting portion 21b can be controlled to reduce the light distribution angle.

  That is, it is possible to reduce the light distribution angle of the lamp body 3 while suppressing an increase in the length of the lamp body 3.

  Moreover, the expansion of the diameter of the 1st reflection member 41 can be suppressed for the same reason as the reason for which the expansion of the length of the 1st reflection member 41 can be suppressed. Therefore, the light distribution angle of the lamp body 3 can be reduced while suppressing the expansion of the width of the lamp body 3. The diameter of the first reflecting member 41 indicates the maximum diameter of the first reflecting member 41.

  The light distribution angle of the lamp body 3 is represented by, for example, a ½ illuminance angle or a ½ beam angle.

  The ½ illuminance angle is an opening angle at a position where the illuminance is 1/2 of the illuminance directly below the light emitting portion 21b when the light emitting portion 21b emits light perpendicular to the horizontal plane. For example, as shown in FIG. 2, when the light emitting unit 21b emits light perpendicular to the horizontal plane, an angle 2θ that is twice the angle θ is a ½ illuminance angle. The angle θ represents an angle between a line connecting the ½ illuminance point and the center of the light emitting unit 21b and a vertical line. The ½ illuminance point indicates a point at which the illuminance is ½ of the illuminance directly below the light emitting unit 21b on the horizontal plane irradiated with light.

  The ½ beam angle is an angle 2α that is twice the angle α formed by the direction of the light intensity that is ½ of the maximum light intensity of the light emitted from the light emitting portion 21b and the optical axis LA.

  Moreover, according to this embodiment, since the light distribution control is shared by the 1st reflection member 41 and the 2nd reflection member 42, compared with the case where only the 1st reflection member is provided, the 1st reflection member 41 is provided. The degree of design freedom can be increased. The reason why the degree of freedom can be increased will be described in comparison with the case where only the first reflecting member is provided.

  That is, when only the first reflecting member is provided, in order to realize a desired light distribution angle, the entire inner surface of the first reflecting member is required to strictly satisfy a predetermined optical condition. However, when the requirement for the predetermined optical condition is severe, it is not easy to design the entire inner surface of the first reflecting member to strictly satisfy the predetermined optical condition. As a result, the size (for example, length and / or diameter) of the first reflecting member must be increased.

  On the other hand, in this embodiment, since the light distribution control is shared by the first reflecting member 41 and the second reflecting member 42, a part of the inner surface 48 of the first reflecting member 41 has a predetermined optical condition. It is sufficient to design to meet strictly. For the other part of the inner surface 48 of the first reflecting member 41, the requirement for satisfying a predetermined optical condition is eased. Accordingly, the degree of freedom in designing the first reflecting member 41 is increased.

  Furthermore, according to the present embodiment, not only the light LT2 can be distributed by the inner peripheral surface 52 and the through path 54 of the second reflecting member 42, but also the light distribution can be controlled by the outer peripheral surface 50. As a result, the light distribution control can be executed with high accuracy.

  Furthermore, according to the present embodiment, the second reflecting member 42 is substantially cylindrical. Accordingly, the second reflecting member 42 can be easily designed and manufactured, and the cost can be reduced.

  Furthermore, according to the present embodiment, the cover member 43 positions the second reflecting member 42 with respect to the light emitting portion 21b. Accordingly, the position of the second reflecting member 42 with respect to the light emitting portion 21b is determined with high accuracy. As a result, the light distribution control by the second reflecting member 42 can be executed with higher accuracy.

  Furthermore, according to the present embodiment, a gap is formed between the light emitting unit 21b and the first reflecting member 41, and between the light emitting unit 21b and the second reflecting member 42, and the members are arranged. Absent. Therefore, light can be efficiently incident on the first reflecting member 41 and the second reflecting member 42 while suppressing loss of light emitted from the light emitting portion 21b.

  Next, the light source unit 21 will be described with reference to FIG. FIG. 4A is a plan view showing the light source unit 21. As shown in FIG. 4A, the substrate 21a of the light source unit 21 has a substantially rectangular shape. The light emitting part 21b has a substantially disc shape. The light emitting unit 21b includes a substantially annular first region 61 and a substantially disc-shaped second region 62. The second area 62 is surrounded by the first area 61. In FIG. 4A, the boundary between the first region 61 and the second region 62 is indicated by a broken line for easy understanding.

  The light emitting unit 21 b includes a plurality of light emitting elements 22. Specifically, the first region 61 includes a plurality of light emitting elements 22, and the second region 62 includes a plurality of light emitting elements 22. 4A shows only one light emitting element 22 in the first region 61 and only one light emitting element 22 in the second region 62 for simplification of the drawing.

  In the present embodiment, the light emitting element 22 is an LED (Light Emitting Diode). The light emitting unit 21b is a COB (Chip on Board) type. The COB type is a type in which the light emitting unit 21b is formed by sealing a plurality of LEDs with a phosphor. The light emitting unit 21b may be an SMD (Surface Mount Device) type. In the SMD type, an LED chip is formed by unitizing an LED and a phosphor, and a plurality of LED chips are placed on the mounting surface of the substrate 21a and electrically connected to the conductive pattern of the substrate 21a. It is a type which forms 21b.

  The light emitting unit 21b may have one light emitting element extending over the first region 61 and the second region 62. In addition, each of the first region 61 and the second region 62 may have one light emitting element. Furthermore, the shapes of the light emitting portion 21b and the second region 62 are not limited to a circular shape, and may be arbitrary shapes. The shape of the first region 61 is not limited to an annular shape, and may be an arbitrary shape.

  Next, with reference to FIG.4 (b), the light emission part 21b and the 2nd reflection member 42 are demonstrated. FIG. 4B is an enlarged cross-sectional view showing the light emitting portion 21b, a part of the first reflecting member 41, and a part of the second reflecting member 42. In FIG. 4B, the hatched lines indicating the cross section are omitted for simplification of the drawing.

  As shown in FIG. 4B, the first region 61 has a maximum width D1. The second region 62 has a maximum width D2. The second reflecting member 42 has a maximum width DS. Further, the incident opening 44 of the first reflecting member 41 has a maximum width DF. Each of the maximum width D1, the maximum width D2, the maximum width DS, and the maximum width DF indicates a width along a direction parallel to the mounting surface. The mounting surface is the mounting surface of the substrate 21a.

  In the present embodiment, since the first region 61 has a substantially annular shape, the maximum width D1 indicates the outer diameter of the first region 61. Since the second region 62 has a substantially disc shape, the maximum width D <b> 2 indicates the outer diameter of the second region 62. Since the second reflecting member 42 is substantially cylindrical, the maximum width DS indicates the outer diameter of the second reflecting member 42. Since the incident opening 44 has a substantially circular shape, the maximum width DF indicates the outer diameter of the incident opening 44.

  The maximum width D1 of the first region 61 is larger than the maximum width D2 of the second region 62. Further, the maximum width D1 of the first region 61 is smaller than the maximum width DF of the incident opening 44. Therefore, compared with the case where the maximum width of the first region is equal to or greater than the maximum width of the incident opening, it is possible to suppress the light emitted from the light emitting portion 21b from leaking to the outside of the first reflecting member 41. As a result, the light emitted from the light emitting unit 21b can be incident on the first reflecting member 41 and the second reflecting member 42 more efficiently.

  Further, the maximum width DS of the second reflecting member 42 is substantially the same as the maximum width D2 of the second region 62. The tip E1 of the second reflecting member 42 faces the second region 62. Therefore, the light emitted from the second region 62 can be easily incident on the inner peripheral surface 52 of the second reflecting member 42. As a result, the second reflecting member 42 can easily share the light distribution control of the light emitted from the second region 62.

  Further, the tip E1 of the second reflecting member 42 protrudes from the incident opening 44 by a predetermined distance P toward the light emitting portion 21b. Therefore, the light emitted from the second region 62 can be more easily incident on the inner peripheral surface 52 of the second reflecting member 42. As a result, the light distribution control of the light emitted from the second region 62 can be more easily shared by the second reflecting member 42.

  Furthermore, the 2nd reflection member 42 is spaced apart from the light emission part 21b. Specifically, the tip E1 of the second reflecting member 42 is separated from the light emitting portion 21b by a predetermined distance G. Therefore, it can suppress that the light emission part 21b contacts the 2nd reflective member 42. FIG. As a result, damage to the light emitting portion 21b and / or the second reflecting member 42 can be suppressed.

  Further, the maximum width D1 of the first region 61 of the light emitting unit 21b is larger than the maximum width DS of the second reflecting member 42. In addition, the first region 61 is located closer to the first reflecting member 41 than the second region 62. In addition, the first region 61 does not face the tip E1 of the second reflecting member 42. Therefore, the light emitted from the first region 61 can be easily incident on the inner surface 48 of the first reflecting member 41. As a result, the first reflection member 41 can easily share the light distribution control of the light emitted from the first region 61.

  As described above with reference to FIGS. 4A and 4B, according to the present embodiment, the size of the first reflecting member 41 (in comparison with the case where only the first reflecting member is provided) For example, the light distribution angle can be reduced while suppressing an increase in length and / or diameter. The reason why the light distribution angle can be reduced while suppressing the increase in size will be described in comparison with the case where only the first reflecting member is provided.

  That is, in order to provide only the first reflecting member and control light distribution of the light emitted from the second region 62 only by the first reflecting member, the light emitted from the second region 62 is used as the inner surface of the first reflecting member. It is required to be incident on. On the other hand, the light emitted from the second region 62 is less likely to enter the inner surface of the first reflecting member than the light emitted from the first region 61. Therefore, in order to reduce the light distribution angle by controlling the light distribution of only the first reflecting member, the length of the first reflecting member is enlarged, and the light emitted from the second region 62 is applied to the inner surface of the first reflecting member. It is required to be incident.

  On the other hand, according to the present embodiment, the light emitted from the second region 62 is subjected to light distribution control by the second reflecting member 42. Therefore, the light distribution control of the light emitted from the second region 62 can be executed while suppressing the increase in the length of the first reflecting member 41. As a result, the light distribution angle can be reduced while suppressing an increase in the length of the first reflecting member 41.

  For the same reason, it is possible to execute light distribution control of the light emitted from the second region 62 while suppressing an increase in the diameter of the first reflecting member 41. As a result, it is possible to reduce the light distribution angle while suppressing an increase in the diameter of the first reflecting member 41. In other words, the light distribution angle can be reduced while suppressing the expansion of the width of the first reflecting member 41.

  Next, the light path will be described with reference to FIG. FIG. 5 is a cross-sectional view showing a path of light emitted from the light emitting unit 21b. In FIG. 5, hatched lines indicating the cross section are omitted for simplification of the drawing.

  As shown in FIG. 5, a part of the light emitted from the first region 61 is incident on the inner surface 48 of the first reflecting member 41 as light LT1. Then, the light LT 1 is reflected by the inner surface 48 and is emitted from the emission opening 46. Further, another part of the light emitted from the first region 61 is incident on the inner peripheral surface 52 of the second reflecting member 42 as the light LT2 or directly emitted from the emission opening 46.

  On the other hand, since the tip E1 of the second reflecting member 42 faces the second region 62, a part of the light emitted from the second region 62 becomes the light LT2, and the inner peripheral surface 52 of the second reflecting member 42 and The light enters the through path 54. Then, the light LT2 passes through the through path 54 and is emitted from the base end E2 of the second reflecting member 42 while being reflected by the inner peripheral surface 52. Further, another part of the light emitted from the second region 62 is incident on the inner surface 48 of the first reflecting member 41 as the light LT1 or directly emitted from the emission opening 46. However, since the tip E1 of the second reflecting member 42 faces the second region 62, the light amount of the light LT2 is larger than the light amount of the other part of the light emitted from the second region.

(Modification)
Next, a modification of the present embodiment will be described with reference to FIG. The lamp body 3 of the lighting fixture 1 according to the modified example is different from the lamp body 3 shown in FIG. Hereinafter, the difference between the lamp body 3 according to the modification and the lamp body 3 shown in FIG. 2 will be mainly described.

  FIG. 6 is a cross-sectional view showing a part of a lamp body 3 according to a modification. As shown in FIG. 6, the lamp body 3 further includes a positioning member 71 (second positioning member). The positioning member 71 transmits the light emitted from the light emitting unit 21b. The color of the positioning member 71 is a transparent color. However, the color of the positioning member 71 is preferably colorless and transparent rather than colored and transparent. This is because the amount of transmitted light can be increased. The positioning member 71 has a substantially disk shape and is attached to the lamp body 3. The thickness of the positioning member 71 is thinner than the thickness of the cover member 43, for example. The positioning member 71 is disposed on the entrance opening 44 side of the entrance opening 44 and the exit opening 46. In the modification, the positioning member 71 is disposed so as to close the incident opening 44.

  The positioning member 71 includes a substantially annular groove 71a. The groove 71a is formed so as to surround the optical axis LA. The tip E1 of the second reflecting member 42 is inserted into the groove 71a, and the tip E1 of the second reflecting member 42 is attached to the positioning member 71. In other words, the positioning member 71 positions the second reflecting member 42 with respect to the light emitting portion 21b. In the modification, the positioning member 71 positions the second reflecting member 42 so that the optical axis LA of the light emitting portion 21b and the central axis CA of the second reflecting member 42 coincide. Therefore, the position of the second reflecting member 42 with respect to the light emitting portion 21b is determined with higher accuracy. As a result, the light distribution control by the second reflecting member 42 can be executed with higher accuracy. In addition, the front-end | tip E1 of the 2nd reflection member 42 opposes the 2nd area | region 62 via the positioning member 71, and is spaced apart from the light emission part 21b. In FIG. 6, in order to distinguish the 1st area | region 61 and the 2nd area | region 62, the broken line is shown for convenience.

  Moreover, as shown in FIG. 6, the cover member 43 which concerns on a modification differs from the cover member 43 shown in FIG. That is, the cover member 43 according to the modification includes a substantially annular groove 43a. The groove 43a is formed so as to surround the optical axis LA. The base end E2 of the second reflecting member 42 is inserted into the groove 43a, and the base end E2 of the second reflecting member 42 is attached to the cover member 43. In other words, the cover member 43 positions the second reflecting member 42 with respect to the light emitting portion 21b. Also in the modified example, the cover member 43 positions the second reflecting member 42 so that the optical axis LA of the light emitting unit 21b and the central axis CA of the second reflecting member 42 coincide. Therefore, the position of the second reflecting member 42 with respect to the light emitting portion 21b is determined with higher accuracy. As a result, the light distribution control by the second reflecting member 42 can be executed with higher accuracy.

  The embodiments (including modifications) of the present invention have been described above with reference to the drawings. However, the present invention is not limited to the above-described embodiment, and can be implemented in various modes without departing from the gist thereof (for example, (1) to (5) shown below). In addition, various inventions can be formed by appropriately combining a plurality of components disclosed in the above embodiments. For example, some components may be deleted from all the components shown in the embodiment. Furthermore, constituent elements over different embodiments may be appropriately combined. In order to facilitate understanding, the drawings schematically show each component as a main component, and the thickness, length, number, interval, etc. of each component shown in the drawings are actual for convenience of drawing. May be different. In addition, the material, shape, dimensions, and the like of each component shown in the above embodiment are merely examples, and are not particularly limited, and various changes can be made without departing from the effects of the present invention. is there.

  (1) In the present embodiment described with reference to FIG. 1, the lighting fixture 1 is a plug-type spotlight. However, the kind of the lighting fixture 1 is not specifically limited. For example, the lighting fixture 1 may be a downlight.

  (2) In the present embodiment described with reference to FIG. 2, the length of the second reflecting member 42 is longer than the length of the first reflecting member 41. However, the length of the second reflecting member 42 is not particularly limited as long as the light distribution control of the light emitted from the light emitting unit 21b can be shared. For example, the length of the second reflecting member 42 may be substantially the same as the length of the first reflecting member 41 or may be shorter than the length of the first reflecting member 41. For example, the length of the second reflecting member 42 is preferably 50% or more of the length of the first reflecting member 41, and more preferably 90% or more of the length of the first reflecting member 41. Further, the entire second reflecting member 42 may be surrounded by the first reflecting member 41. Furthermore, the tip E <b> 1 of the second reflecting member 42 may not protrude from the incident opening 44.

  (3) In the present embodiment described with reference to FIG. 3, the second reflecting member 42 is substantially cylindrical. However, the shape of the second reflecting member 42 is not particularly limited as long as the light distribution control of the light emitted from the light emitting unit 21b can be shared. For example, the shape of the second reflecting member 42 may be a substantially rectangular tube shape (for example, a substantially rectangular tube shape).

  (4) In the present embodiment described with reference to FIG. 3, the second reflecting member 42 is positioned by the cover member 43. However, as long as the second reflecting member 42 can be positioned, a positioning member (first positioning member) other than the cover member 43 may be provided. For example, the second reflecting member 42 may be positioned by a plurality of wires or a plurality of rod-shaped members.

  In the modification of the present embodiment described with reference to FIG. 6, the second reflecting member 42 is positioned by the substantially disc-shaped positioning member 71. However, the shape and positioning method of the positioning member 71 are not particularly limited as long as the second reflecting member 42 can be positioned. For example, the second reflecting member 42 may be positioned by a plurality of wires or a plurality of rod-shaped members.

  (5) In the modification of the present embodiment described with reference to FIG. 6, the positioning member 71 is provided. However, in the modification, the positioning member 71 may not be provided. In the modification, the positioning member 71 is provided with the groove 71a. However, the tip E1 of the second reflecting member 42 and the positioning member 71 may be joined by an adhesive without providing the groove 71a.

  The present invention provides a lighting apparatus and has industrial applicability.

DESCRIPTION OF SYMBOLS 1 Lighting fixture 3 Lamp main body 21 Light source part 21a Board | substrate 21b Light emission part 41 1st reflection member 42 2nd reflection member 43 Cover member (1st positioning member)
44 entrance opening 46 exit opening 50 outer peripheral surface (outer surface)
52 Inner surface (inner surface)
54 Penetration path 61 1st area | region 62 2nd area | region 71 Positioning member (2nd positioning member)
E1 Tip E2 Base

Claims (6)

A light emitting unit;
A first reflecting member;
A second reflecting member,
The first reflecting member reflects light incident on the first reflecting member without passing through the second reflecting member out of the light emitted from the light emitting unit,
At least a part of the second reflecting member is surrounded by the first reflecting member,
The second reflecting member is a lighting fixture that reflects light incident on the second reflecting member without passing through the first reflecting member out of the light emitted from the light emitting unit. The light emitting unit includes a first region and a second region surrounded by the first region,
The lighting fixture according to claim 1, wherein a tip of the second reflecting member faces the second region and is separated from the light emitting unit. The second reflecting member has an outer surface, an inner surface, and a through path,
The lighting device according to claim 1, wherein the through path is surrounded by the inner surface and penetrates the second reflecting member.   The lighting fixture according to claim 3, wherein the second reflecting member has a cylindrical shape. A first positioning member for positioning the second reflecting member with respect to the light emitting unit;
The first reflecting member is
An incident opening through which the light emitted from the light emitting unit is incident;
An exit aperture from which the light incident on the entrance aperture exits;
The lighting device according to any one of claims 1 to 4, wherein the first positioning member is disposed on the exit opening side of the entrance opening and the exit opening. A second positioning member for positioning the second reflecting member with respect to the light emitting unit;
The lighting device according to claim 5, wherein the second positioning member is disposed on the incident opening side of the incident opening and the exit opening.

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