JP2021039831A - Socket unit, light source unit, illumination apparatus and socket - Google Patents

Abstract

To provide a socket unit capable of increasing a degree of freedom in designing of an illumination apparatus.SOLUTION: A socket unit 72 is provided with a socket 720 and a flat plate 750. The flat plate 750 transmits light. The socket 720 includes a main body portion 721 and a holding portion 760. The main body 721 has an opening 730 through which a light source 711 can be exposed. The holding portion 760 holds a flat plate 750 at a position covering the opening 730. The holding portion 760 faces an end face 751 of the flat plate 750.SELECTED DRAWING: Figure 4

Description

The present invention relates to a socket unit, a light source unit, a luminaire and a socket.

The LED module socket described in Patent Document 1 includes a socket body and a translucent cover body. The socket body holds the LED module. The socket body has a central hole for exposing the light emitting portion of the LED module. The socket body has an inclined surface around the central hole. The translucent cover body covers the upper surface side of the socket body. The translucent cover body is made of a translucent material and has a substantially hemispherical shape. According to the LED module socket described in Patent Document 1, it is possible to prevent dust and insects from entering the socket body.

Japanese Unexamined Patent Publication No. 2015-118797

However, in the socket for the LED module described in Patent Document 1, since the translucent cover body has a substantially hemispherical shape, it is necessary to match the shape of the component of the luminaire with the substantially hemispherical translucent cover body. That is, the design of luminaire parts is limited. Therefore, the degree of freedom in design is reduced.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a socket unit, a light source unit, a luminaire, and a socket in which the degree of freedom in designing a luminaire is improved.

The socket unit disclosed in the present application includes a socket and a flat plate. The flat plate transmits light. The socket includes a main body portion and a holding portion. The main body has an opening through which the light emitting element can be exposed. The holding portion holds the flat plate at a position covering the opening.

In the socket unit disclosed in the present application, it is preferable that the holding portion faces the end face of the flat plate.

In the socket unit disclosed in the present application, the holding portion preferably has a wall portion extending along the end face of the flat plate.

In the socket unit disclosed in the present application, the holding portion has a fixing portion. It is preferable that the fixing portion faces the main surface of the flat plate and fixes the flat plate to the socket.

In the socket unit disclosed in the present application, it is preferable that the main body portion further includes a surrounding portion. It is preferable that the surrounding portion extends from the opening toward the outside of the opening along a direction intersecting the thickness direction of the main body portion. The flat plate is preferably supported by the surrounding portion.

In the socket unit disclosed in the present application, the flat plate preferably has a rectangular shape.

The light source unit disclosed in the present application includes the socket unit and a light emitting element.

The luminaire disclosed in the present application includes the above light source unit.

The socket disclosed in the present application includes a main body portion and a holding portion. The main body has an opening through which the light emitting element can be exposed. The holding portion holds a flat plate that transmits light at a position that covers the opening.

According to the socket unit, the light source unit, the luminaire, and the socket of the present invention, the degree of freedom in designing the luminaire can be improved.

It is a perspective view which shows the lighting equipment which concerns on Embodiment 1 of this invention. It is a figure which shows the II-II cross section of the luminaire shown in FIG. It is a perspective view which shows the light source unit in Embodiment 1. FIG. It is an exploded perspective view which shows the light source unit in the state which separated the flat plate from the socket in Embodiment 1. FIG. It is a top view which shows the light source unit in the state which separated the flat plate from the socket in Embodiment 1. FIG. It is a top view which shows the light source unit which held the flat plate in Embodiment 1. FIG. It is a figure which shows the VII-VII cross section of the light source unit shown in FIG. (A) It is a schematic diagram of the luminaire which adopted the socket which concerns on Embodiment 1. FIG. (B) It is a schematic diagram which shows the illuminance of the light emitted by the luminaire 100 of FIG. 8 (a). It is a perspective view which shows the socket of the conventional example. It is a schematic diagram of the luminaire which adopted the conventional socket. (A) is a schematic view of a lighting fixture using a conventional socket. (B) shows a schematic view which shows the irradiation surface when the luminaire shown in FIG. 10A irradiates light. (C) is a schematic view showing the illuminance on the irradiation surface shown in FIG. 10 (b). It is a figure which shows the XI-XI cross section of the light source unit shown in FIG. It is a figure which shows the light source unit which concerns on Embodiment 2 of this invention. It is a perspective view which shows the socket of Embodiment 3 of this invention. It is a schematic diagram of the luminaire which adopted the socket of Embodiment 3. It is a top view which shows the light source unit which concerns on Embodiment 4 of this invention. It is a figure which shows the XVI-XVI cross section of the light source unit shown in FIG. It is a figure which shows the cross section of the light source unit which concerns on Embodiment 5 of this invention. It is a perspective view which shows the light source unit of Embodiment 6 of this invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. However, the present invention is not limited to the following embodiments. In addition, the description may be omitted as appropriate for the part where the description is duplicated. Further, in the drawings, the same or corresponding parts are designated by the same reference numerals and the description is not repeated.

First, the lighting fixture 100 of the present embodiment will be described with reference to FIG. FIG. 1 is a perspective view showing a lighting fixture 100 according to the present embodiment. The luminaire 100 of the present embodiment is mounted on the ceiling (not shown). More specifically, the luminaire 100 of the present embodiment is embedded in the ceiling (not shown).

As shown in FIG. 1, the luminaire 100 includes a lamp main body 1, a support portion 2, a mounting member 3, and a power supply portion (not shown). The lamp body 1 has a heat radiating body 6. The support portion 2 has a fixed frame 4 and a rotating frame 5. The rotating frame 5 has a light leakage regulating unit 51.

The lamp body 1 emits light L. The support portion 2 supports the lamp main body 1. The support portion 2 of the present embodiment supports the lamp body 1 so as to be rotatable and tiltable. More specifically, the fixed frame 4 rotatably supports the rotating frame 5, and the rotating frame 5 rotatably supports the lamp body 1.

Specifically, the fixed frame 4 and the rotating frame 5 are annular or substantially annular. The fixed frame 4 supports the rotating frame 5 so as to be rotatable in the circumferential direction of the fixed frame 4 and the rotating frame 5. Here, the fact that the fixed frame 4 is substantially annular indicates that the fixed frame 4 is partially interrupted in the circumferential direction. Similarly, the fact that the rotating frame 5 is substantially annular indicates that the rotating frame 5 is partially interrupted in the circumferential direction.

The light leakage restricting portion 51 of the rotating frame 5 is a portion of the rotating frame 5 having a width (dimension) in the vertical direction larger than that of other parts of the lamp main body 1. The other part is a part other than the light leakage control unit 51. The vertical direction indicates, for example, a direction along the direction from the radiator 6 toward the rotating frame 5. In the lighting fixture 100 of the present embodiment, the rotating frame 5 is rotatably supported by the fixed frame 4, and the rotating frame 5 rotatably supports the lamp main body 1, but the present invention is not limited to this. The lighting fixture 100 of the present embodiment may have a configuration that does not have the rotating frame 5, and it is not necessary that the rotating frame 5 is rotatable and the lamp main body 1 is tiltable.

The light leakage control unit 51 regulates the leakage of light L from between the lamp body 1 and the rotating frame 5 when the lamp body 1 is tilted. Specifically, the light leakage control unit 51 covers the gap so that a gap does not occur between the lamp main body 1 and the rotating frame 5 when the lamp main body 1 is tilted. Alternatively, the light leakage regulating unit 51 makes the gap generated between the lamp main body 1 and the rotating frame 5 smaller when the lamp main body 1 is tilted. According to the present embodiment, since the rotating frame 5 has the light leakage regulating portion 51, the light L is less likely to leak to the ceiling when the lamp main body 1 is tilted. Therefore, even if the lamp body 1 is tilted, the light efficiency of the luminaire 100 is unlikely to decrease. In order to suppress a decrease in the light efficiency of the lighting fixture 100, it is preferable that the inner surface of the light leakage regulating portion 51 is painted white. Alternatively, the inner surface of the light leakage control unit 51 is preferably a mirror surface.

The mounting member 3 mounts the lamp body 1 at the mounting position. Specifically, the mounting member 3 is fixed to the support portion 2, and the support portion 2 is mounted at the mounting position. By mounting the support portion 2 at the mounting position, the lamp body 1 can be mounted at the mounting position. In this embodiment, the mounting position is, for example, the ceiling (not shown).

Specifically, the mounting member 3 is a long plate-shaped member, and its base end portion is fixed to the fixing frame 4 by a screw B1. The mounting member 3 projects from the fixed frame 4 to the outside in the radial direction of the fixed frame 4 when the luminaire 100 is not mounted on the ceiling (not shown). The mounting member 3 can be bent in a direction in which the tip portion thereof approaches the lamp main body 1. When the luminaire 100 is mounted on the ceiling (not shown), the mounting member 3 is bent to generate an urging force outward in the radial direction. By this urging force, the luminaire 100 is attached to the ceiling (not shown). The mounting member 3 is, for example, a leaf spring. The mounting member 3 may be a wire spring.

The luminaire 100 of the present embodiment includes two mounting members 3. In the present embodiment, the two mounting members 3 are arranged at equal intervals along the circumferential direction of the fixed frame 4. By arranging the two mounting members 3 at equal intervals, the luminaire 100 can be mounted on the ceiling (not shown) in a stable posture. The number of the mounting members 3 is not particularly limited as long as the number of the mounting members 3 is a plurality. Further, the position where the mounting members 3 are arranged is not particularly limited, and the intervals between the plurality of mounting members 3 do not have to be equal.

The heat radiating body 6 dissipates heat from the lamp body 1. The heat radiating body 6 contains a material having a high thermal conductivity. For example, the radiator 6 is made of metal. Specifically, the radiator 6 may be made of aluminum or an aluminum alloy.

The heat radiating body 6 has a plurality of heat radiating fins 61. Each of the plurality of heat radiating fins 61 dissipates heat. Further, each of the plurality of heat radiation fins 61 has a plate shape. Since the heat radiating body 6 has a plurality of heat radiating fins 61, the specific surface area of the heat radiating body 6 is increased, and the heat radiating property of the heat radiating body 6 is improved.

Subsequently, the heat radiating body 6 will be described with reference to FIG. FIG. 2 shows a II-II cross section of the luminaire 100 shown in FIG.

The heat radiating body 6 has a case portion 62. In the present embodiment, the case portion 62 has a cylindrical shape. Specifically, the case portion 62 is open on the light emitting side, which is the side on which the light L is emitted. Further, the case portion 62 has a ceiling portion 621 on the side opposite to the light emitting side.

Subsequently, the lamp main body 1 will be further described with reference to FIG. As shown in FIG. 2, the lamp main body 1 further includes a light source unit 7 and a reflector 8. The light source unit 7 emits light. The light source unit 7 is fixed to the case portion 62 of the radiator body 6. More specifically, the light source unit 7 is fixed to the inner surface of the ceiling portion 621 of the case portion 62. Therefore, the light source unit 7 is arranged inside the case portion 62.

The reflector 8 reflects the light L emitted from the light source unit 7. The reflector 8 suppresses the light L emitted from the light source unit 7 from returning toward the light source unit 7. The reflector 8 is supported by the case portion 62 of the radiator body 6. The reflector 8 has a tubular shape. The diameter of the inner peripheral surface 81 of the reflector 8 gradually increases as the distance from the light source unit 7 increases. For example, the reflector 8 has a substantially truncated cone shape. Specifically, the reflector 8 has a substantially mortar shape. The inner peripheral surface 81 of the reflector 8 is preferably a mirror surface.

The reflector 8 has a first opening 82 and a second opening 83. The first opening 82 and the second opening 83 have a substantially circular shape. The first opening 82 and the second opening 83 are arranged in the direction in which the light L is emitted. The diameters of the first opening 82 and the second opening 83 are different. As shown in FIG. 2, the first opening 82 is an opening located on the light source unit 7 side. The diameter of the first opening 82 is smaller than the diameter of the second opening 83. The second opening 83 is an opening located on the irradiation surface side where the light L is irradiated. The diameter of the second opening 83 is larger than the diameter of the first opening 82. The light L emitted from the light source unit 7 enters through the first opening 82, passes through the second opening 83, and is emitted. The reflector 8 is formed of, for example, a synthetic resin. Further, the reflector 8 may be formed of metal.

Next, the light source unit 7 will be described in detail with reference to FIGS. 2 to 4. FIG. 3 is a perspective view showing the light source unit 7. Note that FIG. 3 is a perspective view showing the light source unit 7 from the side where the reflector 8 is installed. FIG. 4 is an exploded perspective view showing the light source unit 7 in a state where the flat plate 750 is separated from the socket 720. The light source unit 7 emits the light L described with reference to FIGS. 1 and 2. The light source unit 7 includes a light source module 71 and a socket unit 72.

As shown in FIG. 4, the light source module 71 includes a light source 711 and a substrate 712. The light source module 71 is mounted on the mounting surface of the substrate 712. For example, the light source 711 includes a plurality of light emitting elements. The light emitting element is an LED (Light Emitting Diode) array. For example, the light emitting element is a COB (Chip on Board) type formed by sealing a plurality of LEDs with a phosphor. The light emitting element is an SMD (SMD) in which an LED and a phosphor are integrated into one unit to form an LED chip, and a plurality of LED chips are placed on a mounting surface of the substrate 712 and electrically connected to a conductive pattern of the substrate 712. It may be a Surface Mount Device) type.

The socket unit 72 holds the light source module 71. The socket unit 72 includes a flat plate 750 and a socket 720.

The flat plate 750 transmits light. The flat plate 750 is transparent or translucent, and transmits the light emitted by the light source 711. For example, the flat plate 750 is a cover member that protects the light source 711. The flat plate 750 can prevent dust from adhering to the light source 711. Further, the flat plate 750 suppresses the light source 711 from coming into contact with a part of the user's body. Further, by suppressing the contact between the light source 711 and a part of the user's body, for example, the defect of the phosphor of the light emitting element and the damage of the substrate 712 can be suppressed. The flat plate 750 is attached to the socket 720.

For example, the flat plate 750 is formed by molding glass or resin into a flat plate shape. The resin is, for example, silicone. For example, the flat plate 750 is formed by mixing a light diffusing material. For example, the flat plate 750 is formed by providing minute irregularities on a transparent or translucent flat plate-shaped member. For example, the flat plate 750 may have a milky white color. For example, the flat plate 750 may have a shape having a lens function. The lens function is a function of refracting light to diverge or converge the light.

In the present embodiment, the flat plate 750 is preferably made of glass. Therefore, since the flat plate 750 of the present embodiment has a higher heat resistant temperature than the resin, it is less susceptible to heat than the resin cover member. Specifically, deformation and discoloration due to heat are unlikely to occur. Therefore, according to the present embodiment, the desired optical characteristics can be maintained as compared with the case where the cover member made of resin is used. Specifically, when the flat plate 750 is deformed by heat, the light distribution characteristics may change. Further, when the flat plate 750 is discolored by heat, the light color of the light L emitted from the lighting fixture 100 may change with respect to the light color of the light L emitted from the light source 711. Therefore, according to the present embodiment, changes in light distribution characteristics and light color due to heat can be suppressed as compared with the case where a cover member made of resin is used.

The flat plate 750 has a rectangular shape. By forming the flat plate 750 into a rectangular shape, the flat plate 750 can be manufactured with a small number of man-hours, so that the labor of processing the flat plate 750 can be suppressed. As a result, the cover member can be easily manufactured. For example, when the glass cover member is made into a dome shape, it is necessary to cut a large flat glass plate into a predetermined shape and then mold it into a dome shape. On the other hand, the flat glass cover member can be manufactured only by cutting a large flat glass plate into a predetermined shape. The flat plate 750 is not limited to a rectangular shape, and may have an arbitrary shape such as an elliptical shape or a circular shape.

Further, by forming the flat plate 750 into a rectangular shape, it is possible to reduce the waste of the material of the flat plate 750. For example, when a plurality of elliptical flat plates are produced from a large glass plate, the portion between the adjacent elliptical flat plates is a discarded portion. On the other hand, when a plurality of rectangular flat plates 750 are produced from a large glass plate, the amount of waste between the adjacent flat plates 750 and 750 is smaller than that in the case of producing an elliptical flat plate. As a result, the flat plate 750 can be produced while reducing the amount of material to be discarded.

The socket 720 is an electric component that constitutes a contact for connecting the light source module 71 to the electric circuit. The socket 720 is formed by a contact and an insulator. Specifically, the contacts are exposed from the insulator and connected to the electrical circuit. A substantially circular opening 730 is formed in the socket 720. A light source 711 is located in the opening 730. The socket 720 is fixed to the ceiling of the case portion 62 by a screw so that the user cannot easily attach or detach it.

Next, the light source unit 7 will be described in more detail with reference to FIGS. 3 and 4. As shown in FIG. 4, the flat plate 750 has an incident surface 752A, an exit surface 752B, and an end surface 751. The incident surface 752A is a surface on which the light emitted by the light source module 71 is incident. The exit surface 752B is a surface on which light that has entered the inside of the flat plate 750 is emitted from the incident surface 752A. The end surface 751 is a surface located between the entrance surface 752A and the exit surface 752B. The end face 751 constitutes an outer peripheral surface along the thickness direction of the flat plate 750. The end face 751 has a plurality of end faces. The end face 751 has a first end face 751A, a second end face 751B, a third end face 751C, and a fourth end face 751D.

Further, the end surface 751 further has a plurality of notched surfaces 753. The plurality of notched surfaces 753 are formed by notching the corners of the flat plate 750. The corners indicate a pointed and protruding portion of the flat plate 750. For example, the rectangular flat plate 750 has four corners. The plurality of notched surfaces 753 are formed by notching the corners of the rectangular flat plate 750 in the direction A. That is, the end surface 751 further has a plurality of notched surfaces 753 formed by notching, in addition to the first end surface 751A to the fourth end surface 751D.

When producing the flat plate 750, the outer shape of the flat plate 750 may vary. In addition, the size of the socket 720 may vary. Due to the variation in the outer shape of the flat plate 750 and the variation in the size of the socket 720, a part of the mounting portion may interfere with the flat plate 750 and the socket 720. In particular, the mounting portion of the socket 720 corresponding to the corner of the flat plate 750 has a complicated structure, and the accuracy of the mounting portion tends to be low. Therefore, the corner portion of the flat plate 750 may interfere with the mounting portion of the socket 720. That is, pressure may be applied to the corner portion of the flat plate 750. Further, when the assembly worker attaches the flat plate 750 to the socket 720, a force may be applied to the corner portion of the flat plate 750 to attach the flat plate 750 to the socket 720. Therefore, pressure may be applied to the corner portion of the flat plate 750.

The flat plate 750 of the present embodiment can receive the pressure on the notched surface 753 even if the pressure is applied to the corner portion of the flat plate 750. As a result, it is possible to prevent the flat plate 750 from being damaged from the corner portion as compared with the flat plate having no notched surface 753. Breakage means that the flat plate 750 is cracked and the flat plate 750 is chipped.

For example, when the end surface 751 does not have the notched surface 753, a sharp protruding angle is formed at a position where the first end surface 751A and the second end surface 751B are orthogonal to each other. When pressure is applied at the corners, the force is concentrated on the corners and the flat plate may be damaged. On the other hand, when pressure is applied to the notch surface 753, the portion that receives the force increases as compared with the corner, and the force can be dispersed. Therefore, damage to the flat plate 750 can be suppressed.

Further, the plurality of notched surfaces 753 include a first notched surface 753A, a second notched surface 753B, a third notched surface 753C, and a fourth notched surface 753D. The first notched surface 753A is located between the first end surface 751A and the second end surface 751B. The second notched surface 753B is located between the first end surface 751A and the third end surface 751C. The third notched surface 753C is located between the second end surface 751B and the fourth end surface 751D. The fourth notched surface 753D is located between the third end surface 751C and the fourth end surface 751D. Therefore, the first notched surface 753A to the fourth notched surface 753D can prevent the angle of the flat plate 750 from becoming a sharp angle. As a result, the assembling worker can touch the flat plate 750 without paying attention to the corners of the flat plate 750.

The socket 720 includes a main body portion 721 and a holding portion 760. As shown in FIGS. 3 and 4, the main body portion 721 has an opening portion 730 and a surrounding portion 722. Light emitted from the light source 711 can pass through the opening 730. Light can be emitted from the light source 711 through the opening 730. The light source 711 can be exposed in the opening 730. The opening 730 is a through hole.

The opening 730 is a hole penetrating the main body 721 in the thickness direction Z. The thickness direction Z of the main body portion 721 is a direction along the direction A. The direction A is the direction in which the entrance surface 752A and the exit surface 752B are aligned. Direction A includes direction A1 and direction A2. The direction A1 indicates a direction from the incident surface 752A to the exit surface 752B. The direction A2 indicates a direction from the exit surface 752B to the entrance surface 752A.

The opening 730 has a first edge 731, a second edge 732, and a tubular portion 733. The first edge 731 is an edge located on the direction A1 side. The second edge 732 is an edge located on the direction A2 side. The second edge 732 is located on the substrate 712 side. The tubular portion 733 is a wall between the first edge 731 and the second edge 732.

The surrounding portion 722 supports the flat plate 750. Specifically, the surrounding portion 722 supports the flat plate 750 so that the distance between the flat plate 750 and the light source 711 is the distance R (see FIG. 5). Therefore, the surrounding portion 722 supports the flat plate 750, so that the flat plate 750 and the light source 711 are separated by a distance R. As a result, the flat plate 750 can protect the light source 711 without coming into contact with the light source 711. Further, the flat plate 750 and the light source 711 are separated by a distance R. Therefore, the surrounding portion 722 and the flat plate 750 are parallel to each other. As a result, the light distribution characteristics of the luminaire 100 adopting the present invention become substantially uniform with less individual difference for each luminaire 100.

Further, the surrounding portion 722 surrounds the opening 730. The surrounding portion 722 extends from the opening 730 toward the outside of the opening 730 along the direction B intersecting the thickness direction Z of the main body portion 721. The main body 721 has an outer edge 729. The outer edge 729 is an edge showing the outer shape of the main body portion 721. The surrounding portion 722 is located between the first edge 731 and the outer edge 729.

The holding portion 760 holds the flat plate 750. Specifically, the holding portion 760 holds the flat plate 750 at a position covering the opening 730. Therefore, it is possible to prevent dust and the like from adhering to the light source 711. Further, for example, it is not necessary to create a part of the luminaire 100 according to the dome-shaped cover member. Therefore, the degree of freedom in designing the luminaire 100 is improved as compared with the case where the dome-shaped cover member is used.

Further, the holding portion 760 is formed in the socket 720. Then, the flat plate 750 is held by the holding portion 760, so that the socket 720 and the flat plate 750 are made into one unit. Therefore, it is not necessary to separately form a holding portion 760 for holding the flat plate 750 on the case portion 62. As a result, the degree of freedom in designing the luminaire 100 is improved.

Further, the flat plate 750 is thinner than the dome-shaped cover member. Therefore, by integrating the socket 720 and the flat plate 750 into one unit, the socket unit 72 can be made thinner than the case where the dome-shaped cover member is attached to the socket 720. Further, the thickness of the socket unit 72, which is a unit of the socket 720 and the flat plate 750, is equal to the thickness of the socket 720 alone. That is, the flat plate 750 is held by the holding portion 760 so as to be within the thickness range of the socket 720. Therefore, the socket unit 72 can be made thinner.

Further, since the position of the flat plate 750 can be arranged near the light source 711, the reflector 8 can be arranged near the light source 711 as compared with the case where the dome-shaped cover member is attached to the socket 720. As a result, the amount of light leaking from between the socket 720 and the reflector 8 to the outside of the reflector 8 can be reduced, so that the emission efficiency of the luminaire 100 is improved. The emission efficiency indicates the ratio of the amount of light emitted from the luminaire 100 to the amount of light emitted from the light source 711.

Further, as shown in FIG. 4, the holding portion 760 is located outside the opening 730. Specifically, the holding portion 760 is located between the first edge 731 and the outer edge 729. That is, the flat plate 750 is larger than the opening 730 and smaller than the holding portion 760. Therefore, since the flat plate 750 can cover the opening 730, the flat plate 750 can protect the light source 711. As a result, the flat plate 750 suppresses the adhesion of dust to the light source 711 and prevents the light source 711 from coming into contact with a part of the user's body.

As shown in FIG. 3, the holding portion 760 faces the end face 751 of the flat plate 750. Since the end surface 751 of the flat plate 750 and the holding portion 760 face each other, the holding portion 760 restricts the flat plate 750 from moving in the direction B parallel to the incident surface 752A shown in FIG. 4, for example. As a result, the flat plate 750 can be prevented from moving in the direction B parallel to the incident surface 752A, and the flat plate 750 can be prevented from falling off from the holding portion 760.

Further, the holding portion 760 has a holding wall 761. The holding wall 761 extends along the end face 751 of the flat plate 750 as shown in FIG. Since the holding wall 761 extends along the end face 751 of the flat plate 750, the holding wall 761 reflects the light leaked from the end face 751. Therefore, the leakage of light can be suppressed. As a result, the emission efficiency of the light emitted from the light source 711 can be improved.

Specifically, the holding wall 761 is a wall that rises from the main body portion 721 in the direction A1. The height of the holding wall 761 substantially coincides with the height of the end face 751 of the flat plate 750. The height of the holding wall 761 may be smaller than the height of the end face 751 of the flat plate 750.

The holding wall 761 has a plurality of wall portions. Specifically, the holding wall 761 includes a first holding wall 761A, a second holding wall 761B, a third holding wall 761C, and a fourth holding wall 761D. The first holding wall 761A faces the first end surface 751A of the flat plate 750. The second holding wall 761B faces the second end surface 751B of the flat plate 750. The third holding wall 761C faces the third end surface 751C of the flat plate 750. The fourth holding wall 761D faces the fourth end surface 751D of the flat plate 750. Therefore, the flat plate 750 is surrounded by the first holding wall 761A to the fourth holding wall 761D. As a result, it is possible to restrict the movement of the flat plate 750 in the direction B parallel to the incident surface 752A or the direction B parallel to the exit surface 752B.

Further, the holding wall 761 has a rectangular shape or a substantially rectangular shape. That is, the shape is similar to the shape of the flat plate 750. Therefore, when the flat plate 750 is positioned on the holding portion 760, the positioning of the holding portion 760 and the flat plate 750 becomes easy. As a result, the work efficiency when the flat plate 750 is held by the holding portion 760 of the socket 720 is improved.

For example, in general, when a cover member is attached to a socket, the cover member is attached to the socket by matching the locking portion of the socket with the locking portion of the cover member. It is necessary to align the locking portion of the socket with the locking portion of the cover member, which reduces work efficiency. On the other hand, since the holding wall 761 and the flat plate 750 of the socket 720 of the present invention have a rectangular shape, they can be easily aligned with each other. The efficiency of assembly work when the socket 720 and the flat plate 750 are integrated into one unit is improved.

Further, when the holding wall 761 of the socket 720 has a rectangular shape, the formation of the corner portion of the holding wall 761 may be insufficient. For example, the thickness of the holding wall 761 at the corner portion may be larger than that at the portion other than the corner portion. Specifically, the thickness of the corner portion may increase in the direction of the opening 730. The cutout surface 753 of the flat plate 750 corresponds to the corner portion of the holding wall 761, and the thick corner portion can be avoided. Therefore, even when the corners of the holding wall 761 are not sufficiently formed, the holding portion 760 can hold the flat plate 750.

Further, the first holding wall 761A extends along the first end surface 751A of the flat plate 750. The second holding wall 761B extends along the second end surface 751B of the flat plate 750. The third holding wall 761C extends along the third end surface 751C of the flat plate 750. The fourth holding wall 761D extends along the fourth end face 751D of the flat plate 750. Therefore, the light emitted from the first end surface 751A to the fourth end surface 751D is prevented from leaking by the first holding wall 761A to the fourth holding wall 761D. As a result, it is possible to suppress the emission of light from a surface other than the exit surface 752B.

Next, the light source unit 7 will be described in more detail with reference to FIGS. 4 and 5. FIG. 5 is a plan view showing the light source unit 7 in a state where the flat plate 750 is separated from the socket 720. Note that FIG. 5 shows the light source unit 7 from the side where the reflector 8 is installed.

The holding portion 760 further has a rising wall 762. As shown in FIG. 4, the rising wall 762 is a wall that rises from the main body portion 721 in the direction A1. The rising wall 762 surrounds the through hole 763. The through hole 763 is a rectangular hole. The fourth holding wall 761D is located in the through hole 763. The height of the rising wall 762 is substantially the same as the height of the holding wall 761.

As shown in FIG. 5, the rising wall 762 has a plurality of wall portions. Specifically, the rising wall 762 has a first rising wall 762A, a second rising wall 762B, a third rising wall 762C, and a fourth rising wall 762D.

The first rising wall 762A faces the fourth holding wall 761D. The second rising wall 762B extends from the end of the second holding wall 761B on the fourth holding wall 761D side. Specifically, the second rising wall 762B extends in a direction parallel to the second holding wall 761B. The third rising wall 762C extends from the end of the third holding wall 761C on the fourth holding wall 761D side. Specifically, the third rising wall 762C extends in a direction parallel to the third holding wall 761C.

The fourth rising wall 762D connects the first rising wall 762A and the fourth holding wall 761D. The fourth rising wall 762D extends from the fourth holding wall 761D toward the first holding wall 761A. That is, the fourth holding wall 761D is located in the central portion of the through hole 763 in a state of being supported by the fourth rising wall 762D.

Further, the fourth rising wall 762D extends from the intermediate portion of the first rising wall 762A toward the intermediate portion of the fourth holding wall 761D. The fourth rising wall 762D supports an intermediate portion of the fourth holding wall 761D. That is, both ends of the fourth holding wall 761D swing around the fourth rising wall 762D. For example, both ends of the fourth holding wall 761D swing in a direction approaching the first rising wall 762A and in a direction away from the first rising wall 762A.

Therefore, when the flat plate 750 is positioned between the first holding wall 761A and the fourth holding wall 761D, the end portion of the fourth holding wall 761D is moved in the direction approaching the first rising wall 762A. That is, the flat plate 750 is surrounded by the first holding wall 761A to the fourth holding wall 761D. As a result, it becomes easy to make the end face 751 of the flat plate 750 and the holding portion 760 face each other. Further, by moving the end of the fourth holding wall 761D in the direction approaching the first rising wall 762A, the flat plate 750 located between the first holding wall 761A and the fourth holding wall 761D is separated from the holding portion 760. It becomes easy to make it.

As shown in FIG. 5, the second holding wall 761B and the third holding wall 761C have a notch 765. The notch 765 is cut out, for example, to bring the tip of a flat-blade screwdriver into contact with the end face 751 of the flat plate 750. For example, when the flat plate 750 is separated from the holding portion 760, the tip of a flat-blade screwdriver is brought into contact with the end face 751 of the flat plate 750 to elastically deform the flat plate 750 to release the engagement state between the flat plate 750 and the fixed portion 770. , It becomes easy to move in the direction A1. As a result, the flat plate 750 can be easily separated from the holding portion 760. The fixed portion 770 is elastically deformed to release the engagement state between the fixed portion 770 and the flat plate 750, the tip of a flat-blade screwdriver is brought into contact with the end face 751 of the flat plate 750, and the flat plate 750 is moved in the direction A1. May be good.

Next, the socket 720 will be described in detail with reference to FIGS. 6 to 10. FIG. 6 is a plan view showing the light source unit 7 in which the flat plate 750 is held. FIG. 7 shows a VII-VII cross section of the light source unit 7 shown in FIG. The VII-VII cross section of the light source unit 7 is a cross section orthogonal to the direction C. The direction C is the direction in which the second holding wall 761B and the third holding wall 761C are lined up. Direction C includes direction C1 and direction C2. The direction C1 indicates a direction from the second holding wall 761B to the third holding wall 761C. The direction C2 indicates the direction from the third holding wall 761C to the second holding wall 761B. FIG. 7 is a view of the light source unit 7 viewed from the direction C1 from the second holding wall 761B toward the third holding wall 761C. FIG. 8A is a schematic view of a luminaire 100 using the socket 720 according to the present embodiment. FIG. 8A shows a luminaire 100 including a socket 720, a light source module 71, and a reflector 8 for convenience of explanation. FIG. 8B is a schematic view showing the illuminance of the light emitted by the luminaire 100 of FIG. 8A. FIG. 9 is a perspective view showing a conventional socket. FIG. 10 is a schematic view of a lighting fixture using a conventional socket. FIG. 10A is a schematic view of a lighting fixture using a conventional socket. FIG. 10B shows a schematic view showing an irradiation surface when the luminaire shown in FIG. 10A irradiates light. FIG. 10 (c) is a schematic view showing the illuminance on the irradiation surface shown in FIG. 10 (b).

As shown in FIG. 7, the socket 720 further includes a light source holding portion 735. The light source holding unit 735 holds the substrate 712. The light source holding portion 735 holds the substrate 712 so that the light source 711 is located at the center of the opening 730.

Further, as shown in FIG. 7, the surrounding portion 722 of the socket 720 has a first surface 723 in a cross-sectional view. The first surface 723 extends along the substrate 712 on which the light source 711 is formed. The substrate 712 is arranged in a direction along the direction D, for example. That is, the first surface 723 extends in the direction along the direction D. Therefore, the surrounding portion 722 has a flat surface. Therefore, for example, as disclosed in Japanese Patent Application Laid-Open No. 2015-118977 shown in FIG. 9, an inclined surface 202 inclined from the outside of the opening 203 toward the light source 711 toward the side where the substrate 712 is arranged is a surrounding portion. Not at 722. That is, in the present embodiment, the light emitted from the light source 711 is not reflected on the inclined surface. As a result, it is possible to suppress uneven illuminance caused by flare generated by the light reflected on the inclined surface.

Further, as shown in FIG. 8, the holding wall 761 can reflect the light that has passed through the opening 730. The holding wall 761 extends away from the opening 730 along the thickness direction Z of the main body 721.

The socket 720 is, for example, injection molded. Injection molding is a molding method in which molten resin is injected into a combined mold, the resin is cooled, and the solidified resin is taken out from the mold. In addition, when the solidified resin is taken out, the combined mold is disassembled. Generally, a draft is set in the mold so that the solidified resin can be easily removed from the mold. Therefore, the holding wall 761 of the socket 720 may have a gradient along the draft of the mold. Therefore, in the first wall portion of the present invention, not only the first wall portion extending in the direction parallel to the thickness direction Z of the main body portion 721 but also the holding wall 761 extending in the direction along the draft of the mold is first. Included in the wall.

The light that has passed through the opening 730 includes light that goes to a surface other than the irradiation surface in addition to the light L1 that goes to the irradiation surface. The light L2 is a part of the light directed to other than the irradiation surface. When the light L2 directed to a surface other than the irradiation surface irradiates an area different from the irradiation area desired by the designer, flare occurs, which causes uneven illuminance. The holding wall 761 reflects, for example, at least a part of the light L2 directed to other than the irradiation surface. Since the holding wall 761 is arranged at a position close to the light source 711, the incident angle and the reflection angle of the light on the holding wall 761 are small. Therefore, most of the light L2 reflected by the holding wall 761 is reflected at yet another location. Another location is, for example, a location other than the holding wall 761. Locations other than the holding wall 761 may be, for example, the socket 720 and the reflector 8. The socket 720 and the reflector 8 can reflect the light L2. By repeating the reflection, the optical path length of the light L2 becomes long. The longer the optical path length, the more diffused or attenuated the light L2. Therefore, the light L2 directed to a region different from the irradiation region desired by the designer can be diffused or attenuated. As a result, the amount of light L2 that reaches the irradiated surface becomes very small, flare generation on the irradiated surface can be suppressed, and uneven illuminance can be suppressed.

Further, as shown in FIG. 8A, the light L2 reflected by the holding wall 761 is further reflected by, for example, the reflector 8. Therefore, the optical path length of the light L2 reflected by the reflector 8 becomes longer, and the attenuation of the light L2 is further promoted. Therefore, the light L2 that causes flare hardly reaches the irradiated surface. As a result, uneven illuminance can be further suppressed.

For example, as shown in graph G1 of FIG. 8B, illuminance unevenness can be suppressed. The graph G1 shown in FIG. 8B is a graph showing the relationship between the illuminance (lux) and the position P. The position P shown in the graph G1 includes positions A to G. The positions A, B, F, and G shown in FIG. 8B are different from the irradiation region of the light L1. Positions C to E are irradiation regions of light L1 on the irradiation surface. The position D is the center of the optical axis of the light source 711, and is the position where the maximum illuminance that can be detected in the irradiation region of the light L1 is obtained.

As shown in FIG. 8B, the light L2 hardly reaches the irradiated surface. That is, most of the light that reaches the irradiated surface becomes light L1. Therefore, it is possible to suppress the illuminance unevenness that occurs when the light L2 reaches the irradiation surface.

On the other hand, the socket 201 (hereinafter, may be referred to as a conventional example) disclosed in Japanese Patent Application Laid-Open No. 2015-118797 shown in FIG. 9 reflects light on the inclined surface 202. Since the light reflected by the inclined surface 202 is not sufficiently attenuated, most of the light reaches the irradiated surface. That is, the light reaches a region different from the irradiation region desired by the designer. The inclined surface 202 of the conventional example shown in FIG. 9 is inclined from the outside of the opening 203 toward the center of the opening 203.

For example, as shown in FIG. 10A, the light emitted from the light source 204 of the conventional example is the light L3 directed to the irradiation surface and the light directed to the inclined surface 202 and reflected by the inclined surface 202 toward the irradiation surface. Including L4.

The irradiation surface shown in FIG. 10B includes a first region L10 and a second region L20. The first region L10 indicates a region where the light L3 reaches. The first region L10 is inside the second region L20. The second region L20 indicates a region where the light L4 reaches. The second region L20 indicates a region outside the first region L10. The second region L20 surrounds the first region L10.

Graph G2 shown in FIG. 10 (c) shows the relationship between the illuminance (lux) and the position P. The position P shown in the graph G2 includes the positions A to G.

The position A and the position G are the outer edge portions of the second region L20. The illuminance at position A and the illuminance at position G are the smallest values that can be detected in the second region L20. Position B and position F are intermediate portions of the second region L20. The illuminance at position B and the illuminance at position F are the highest values that can be detected in the second region L20. Position C and position E are boundary portions between the first region L10 and the second region L20. That is, the position C and the position E are the inner edge portion of the second region L20 and the outer edge portion of the first region L10. The illuminance at position C and the illuminance at position E are the smallest values that can be detected in the second region L20. Further, the illuminance at the position C and the illuminance at the position E are the smallest values among the illuminances that can be detected in the first region L10. Position D is an intermediate portion of the first region L10. The illuminance at the position D is the highest value among the illuminances that can be detected in the first region L10.

Positions A to C and positions E to G correspond to the second region L20 shown in FIG. 10 (b). Further, the positions C to E correspond to the first region L10 shown in FIG. 10 (b). As shown in FIG. 10 (c), the illuminance of the first region L10 and the illuminance of the second region L20 are different. When the light L3 and the light L4 having different illuminances reach the irradiation surface, uneven illuminance occurs on the irradiation surface. Due to the occurrence of uneven illuminance, the irradiation pattern of the light irradiated to the irradiation surface becomes a donut shape as shown in FIG. 10 (b). As described with reference to FIGS. 9 and 10, the socket of the conventional example cannot suppress the uneven illuminance.

On the other hand, in the luminaire 100 that employs the socket 720 of the present embodiment, as shown in FIG. 8B, most of the light L2 does not reach the irradiation surface. That is, most of the light L2 does not reach the second region L20 shown in the conventional example of FIG. 10B. Therefore, in the luminaire 100 of the present embodiment, the illuminance detected at the positions A to C and the positions E to G shown in FIG. 8B is considerably low. Therefore, the irradiation pattern of the luminaire 100 that employs the socket 720 of the present embodiment has a shape as shown by the first region L10. Therefore, the socket 720 of the present embodiment can suppress uneven illuminance.

Subsequently, the socket 720 will be described in more detail with reference to FIGS. 6 and 7. As shown in FIGS. 6 and 7, the holding portion 760 has a fixing portion 770. The fixing portion 770 faces the exit surface 752B of the flat plate 750. The exit surface 752B corresponds to an example of a “main surface”. Then, the fixing portion 770 fixes the flat plate 750 to the main body portion 721. That is, the fixing portion 770 fixes the flat plate 750 to the socket 720. Therefore, the fixing portion 770 restricts the flat plate 750 from moving in the A1 direction. As a result, it is possible to prevent the flat plate 750 from falling off from the holding portion 760.

As shown in FIG. 6, the fixing portion 770 includes a plurality of first fixing portions 771 and a plurality of second fixing portions 772. The plurality of first fixing portions 771 and the plurality of second fixing portions 772 have, for example, a snap-fit structure.

The plurality of first fixing portions 771 are arranged on the first holding wall 761A. For example, as shown in FIG. 6, two plurality of first fixing portions 771 are arranged on the first holding wall 761A. Further, one of the plurality of first fixing portions 771 is located at one of the end portions of the first holding wall 761A. Further, the other of the plurality of first fixing portions 771 is located at the other of the end portions of the first holding wall 761A.

As shown in FIG. 7, the first fixing portion 771 has a base portion 771A and a claw portion 771B. The base portion 771A extends from the first holding wall 761A along the direction A1 of the main body portion 721. The base 771A positions the claw 771B higher than the exit surface 752B of the flat plate 750.

The claw portion 771B extends along the direction D. The direction D is the direction in which the first holding wall 761A and the fourth holding wall 761D shown in FIG. 6 are aligned. Direction D includes direction D1 and direction D2. The direction D1 indicates a direction from the first holding wall 761A to the fourth holding wall 761D. The direction D2 indicates the direction from the fourth holding wall 761D to the first holding wall 761A. Specifically, the claw portion 771B protrudes from the base portion 771A along the direction D1 from the first holding wall 761A to the fourth holding wall 761D. As shown in FIG. 7, the claw portion 771B has a rectangular shape when viewed from the direction C in a cross-sectional view.

The claw portion 771B has a facing surface 771C. The facing surface 771C faces the exit surface 752B of the flat plate 750. When the facing surface 771C comes into contact with the exit surface 752B, it is possible to restrict the flat plate 750 from moving in the A1 direction. In the present embodiment, an example in which two first fixing portions 771 are arranged on the first holding wall 761A has been described, but the present invention is not limited to this. The first fixed portion 771 may be one or two or more.

Further, the plurality of second fixing portions 772 are arranged on the fourth holding wall 761D. For example, as shown in FIG. 6, two plurality of second fixing portions 772 are arranged on the fourth holding wall 761D. Further, one of the plurality of second fixing portions 772 is located at one of the end portions of the fourth holding wall 761D. Further, the other of the plurality of second fixing portions 772 is located at the other of the end portions of the fourth holding wall 761D.

As shown in FIG. 7, the second fixing portion 772 has a base portion 772A and a claw portion 772B. The base 772A extends along direction A1 from the fourth holding wall 761D. The base portion 772A positions the claw portion 772B at a position higher than the exit surface 752B of the flat plate 750.

The claw portion 771B extends along the direction D. Specifically, the claw portion 772B projects from the base portion 772A along the direction D2 from the fourth holding wall 761D toward the first holding wall 761A. The claw portion 772B has a substantially triangular shape when viewed from the direction C in a cross-sectional view.

The claw portion 772B has a facing surface 772C and an inclined surface 772D.

The facing surface 772C faces the exit surface 752B of the flat plate 750. When the facing surface 772C comes into contact with the exit surface 752B, it is possible to restrict the flat plate 750 from moving in the thickness direction Z of the main body portion 721. Therefore, the flat plate 750 can be restricted from moving in the direction A1 of the main body 721 by having the facing surface 771C of the claw portion 771B and the facing surface 772C of the claw portion 772B facing the exit surface 752B. As a result, it is possible to further restrict the flat plate 750 from falling off from the holding portion 760.

The inclined surface 772D guides the flat plate 750 to the surrounding portion 722 when the flat plate 750 is attached to the socket 720. The inclined surface 772D is inclined from the outside of the opening 730 toward the light source module 71 toward the side where the substrate 712 is arranged. By pressing the flat plate 750 in the direction A2 with the flat plate 750 in contact with the inclined surface 772D, the flat plate 750 slides on the inclined surface 772D and is guided to the surrounding portion 722.

Specifically, the flat plate 750 is positioned on the holding portion 760 so that the facing surface 771C of the first fixed portion 771 and the exit surface 752B of the flat plate 750 face each other. Then, the incident surface 752A of the flat plate 750 and the inclined surface 772D of the second fixing portion 772 are brought into contact with each other. Further, the flat plate 750 is pressed in the direction A2. The flat plate 750 pressed in the direction A2 presses the inclined surface 772D. When the inclined surface 772D is pressed by the flat plate 750, both ends of the fourth holding wall 761D move toward the first rising wall 762A. As both ends of the fourth holding wall 761D move, the second fixing portion 772 also moves toward the first rising wall 762A.

Then, the incident surface 752A of the flat plate 750 moves in the direction A2 while abutting on the inclined surface 772D. Further, the incident surface 752A of the flat plate 750 abuts on the surrounding portion 722. Further, when the surrounding portion 722 and the incident surface 752A of the flat plate 750 come into contact with each other, both ends of the fourth holding wall 761D are returned to their original positions.

By returning both ends of the fourth holding wall 761D to their original positions, the facing surface 772C of the second fixing portion 772 and the exit surface 752B of the flat plate 750 face each other. That is, the facing surface 771C of the first fixed portion 771 and the exit surface 752B of the flat plate 750 face each other, and the facing surface 772C of the second fixed portion 772 and the exit surface 752B of the flat plate 750 face each other. Therefore, it is possible to prevent the flat plate 750 from moving in the direction A.

In the present embodiment, an example in which two second fixing portions 772 are arranged on the fourth holding wall 761D has been described, but the present invention is not limited to this. The number of the second fixing portions 772 may be one, or may be two or more.

Since the flat plate 750 is surrounded by the first holding wall 761A to the fourth holding wall 761D, the flat plate 750 is set in the direction A, the direction C, and the direction D by the holding portion 760 and the fixing portion 770. Movement is suppressed. As a result, it is possible to further prevent the flat plate 750 from falling off from the holding portion 760.

Next, the light source unit 7 will be described in more detail with reference to FIGS. 6 and 11. FIG. 11 shows a XI-XI cross section of the light source unit 7 shown in FIG. FIG. 11 is a view of the light source unit 7 viewed from the direction D1 from the first holding wall 761A to the fourth holding wall 761D.

The substrate 712 of the light source module 71 shown in FIG. 11 has an energizing unit 712A. The energizing unit 712A energizes the power supply unit (not shown). The back surface of the mounting surface of the light source 711 of the substrate 712 is in contact with the heat radiating body 6.

The socket 720 further includes a terminal 785 and a terminal holding portion 780. Specifically, the socket 720 further includes two terminals 785 and two terminal holding portions 780. Since the two terminals 785 have the same shape, one terminal 785 will be described as an example. Further, since the two terminal holding portions 780 have the same shape, one terminal holding portion 780 will be described as an example.

The terminal 785 comes into contact with the energized portion 712A of the substrate 712. Further, the terminal 785 comes into contact with the wiring W. The wiring W is connected to a power supply unit (not shown). Therefore, when the terminal 785 and the energizing unit 712A come into contact with each other, the power supply voltage generated by the power supply unit (not shown) can be applied to the light source 711.

The terminal 785 has a wiring holding portion 786 and a tip portion 787. As shown in FIG. 11, the wiring holding portion 786 holds the wiring W guided to the inside of the socket 720. As shown in FIG. 11, the tip portion 787 comes into contact with the energized portion 712A of the substrate 712.

The terminal holding portion 780 is located outside the surrounding portion 722 with respect to the opening 730. The terminal holding portion 780 holds the terminal 785. Specifically, the terminal holding portion 780 holds the terminal 785 while covering the terminal 785.

The terminal holding portion 780 has a main body holding portion 781 and a tip holding portion 782. The main body holding portion 781 holds the wiring holding portion 786. Therefore, the misalignment of the wiring holding portion 786 can be suppressed. As a result, it is possible to prevent the wiring holding portion 786 from being displaced and the wiring W from falling off from the main body holding portion 781.

The tip holding portion 782 covers the tip portion 787 of the terminal 785. Specifically, the tip holding portion 782 extends along the tip 787 so as to cover the tip 787. Therefore, the tip holding portion 782 covers the tip portion 787 so as to press the tip portion 787 in the direction A2. As a result, it is possible to prevent the tip portion 787 from being separated from the energizing portion 712A.

Further, the tip holding portion 782 has a stepped shape in a cross-sectional view. The staircase shape of the tip holding portion 782 projects toward the opening 730. Specifically, the staircase shape of the tip holding portion 782 extends toward the opening 730. More specifically, in a cross-sectional view, the staircase shape of the tip holding portion 782 becomes higher from the opening 730 toward the outside of the opening 730. In other words, the tip holding portion 782 has a plurality of steps that increase from the opening 730 toward the outside of the opening 730. Therefore, since there is no inclined surface around the opening 730 that inclines from the outside of the opening 730 toward the light source 711 toward the side where the substrate 712 is arranged, unnecessary reflected light can be reduced. As a result, uneven illuminance caused by flare can be suppressed.

The staircase shape of the tip holding portion 782 is composed of a plurality of flat surfaces 783 and a plurality of wall portions 784. The plurality of flat surfaces 783 and the plurality of wall portions 784 are arranged alternately.

The plurality of flat surfaces 783 are surfaces along the direction C. The plurality of flat surfaces 783 include a first flat surface 783A and a second flat surface 783B. The first flat surface 783A and the second flat surface 783B are located between the third holding wall 761C and the main body holding portion 781. The first flat surface 783A is located next to the third holding wall 761C. The second flat surface 783B is located next to the main body holding portion 781. Therefore, since there is no inclined surface around the opening 730 that inclines from the outside of the opening 730 toward the light source 711 toward the side where the substrate 712 is arranged, unnecessary reflected light can be reduced. As a result, uneven illuminance caused by flare can be suppressed.

The plurality of wall portions 784 reflect the light L that has passed through the opening 730. The plurality of wall portions 784 can be regarded as wall portions. The plurality of wall portions 784 form a part of the staircase shape or the entire staircase shape. The staircase shape is generally composed of a tread plate and a riser plate. In this embodiment, the wall portion 784 corresponds to a riser plate. When a plurality of wall portions 784 form a part of the staircase shape, a part of the riser plate of the staircase shape becomes the wall portion 784. Further, when a plurality of wall portions 784 constitute the entire staircase shape, all the risers in the staircase shape form the wall portion 784.

The plurality of wall portions 784 include a first wall 784A, a second wall 784B, and a third wall 784C. The first wall 784A is located between the third holding wall 761C and the first flat surface 783A. The second wall 784B is located between the first flat surface 783A and the second flat surface 783B. The third wall 784C is located between the second flat surface 783B and the main body holding portion 781.

Each of the plurality of wall portions 784 extends away from the opening 730 along the direction A1. The plurality of wall portions 784 reflect, for example, at least a part of the light directed to other than the irradiation surface. The light reflected by the plurality of wall portions 784 is reflected at yet another place, and the light is diffused or attenuated. Therefore, the light directed to other than the irradiation surface can be diffused or attenuated. As a result, light that causes flare can be diffused or attenuated, and uneven illuminance can be suppressed.

[Embodiment 2]
Next, the light source unit 7 of the second embodiment will be described with reference to FIGS. 6, 7 and 12. The light source unit 7 of the second embodiment is different from the light source unit 7 of the first embodiment in that the surrounding portion 722 of the socket 720 extends in a direction acutely intersecting the thickness direction Z of the main body portion 721. Hereinafter, the second embodiment will be described with respect to matters different from the first embodiment, and the description of the portion overlapping with the first embodiment will be omitted.

FIG. 12 is a diagram showing the light source unit 7 of the second embodiment. The light source unit 7 shown in FIG. 12 has a cross section along the same direction C as the VII-VII cross section shown in FIG. Further, the light source unit 7 shown in FIG. 12 is a view of the light source unit 7 viewed from the direction C1 shown in FIG.

As shown in FIG. 12, the surrounding portion 722 of the second embodiment has a second surface extending from the opening 730 toward the outside of the opening 730 and extending toward the side on which the substrate 712 is arranged in a cross-sectional view. It has 724. Specifically, the surrounding portion 722 has a second surface 724 that inclines so as to decrease in height from the opening 730 toward the holding portion 760. Since the surrounding portion 722 is inclined, the distance between the facing surface 771C shown in FIG. 9 and the surrounding portion 722 is larger than the distance between the facing surface 771C shown in FIG. 7 and the surrounding portion 722. Therefore, it becomes easy to position the flat plate 750 between the facing surface 771C and the surrounding portion 722. As a result, the flat plate 750 can be easily held by the holding portion 760.

In a cross-sectional view, the surrounding portion 722 extends toward the first surface 723 extending along the substrate 712 on which the light source 711 shown in FIG. 7 is formed, or toward the side on which the substrate 712 shown in FIG. 12 is arranged. It may have two sides 724. Further, in the cross-sectional view, the surrounding portion 722 has a first surface 723 extending along the substrate 712 on which the light source 711 shown in FIG. 7 is formed and a second surface extending toward the side on which the substrate 712 shown in FIG. 12 is arranged. It may have 724 and.

[Embodiment 3]
Next, the socket 720 of the third embodiment will be described with reference to FIGS. 13 and 14. The socket 720 of the third embodiment is different from the light source unit 7 of the first embodiment and the light source unit 7 of the second embodiment in that the surrounding portion 722 has a stepped shape. Hereinafter, the third embodiment will be described with respect to matters different from those of the first and second embodiments, and the description of the parts overlapping with the first and second embodiments will be omitted. FIG. 13 is a perspective view showing the socket 720 of the third embodiment. FIG. 14 is a schematic view of the luminaire 100 that employs the socket 720 of the third embodiment. In FIG. 14, a part of the configuration of the luminaire 100 is omitted in order to facilitate the understanding of the invention.

The main body portion 721 of the third embodiment has a surrounding portion 722 surrounding the opening 730. The surrounding portion 722 has a staircase shape. Specifically, the surrounding portion 722 has a staircase shape and extends divergently so as to be separated from the opening 730.

The surrounding portion 722 has a plurality of first surface portions 723 and a plurality of wall portions 725. The plurality of first surfaces 723 are flat surfaces. Specifically, as shown in FIG. 13, the plurality of first surfaces 723 are surfaces along a direction orthogonal to the opening direction of the opening 730. The opening direction of the opening 730 is along the thickness direction Z of the socket 720. The direction orthogonal to the opening direction of the opening 730 is, for example, a direction along the direction B shown in FIG.

The plurality of first flat surfaces 723 include a first flat surface 723A, a second flat surface 723B, a third flat surface 723C, and a fourth flat surface 723D. The first flat surface 723A is a surface located between the opening 730 and the second flat surface 723B. The second flat surface 723B is a surface located between the first flat surface 723A and the third flat surface 723C. The third flat surface 723C is a surface located between the second flat surface 723B and the fourth flat surface 723D. The fourth flat surface 723D is a surface located outside the third flat surface 723C.

The plurality of wall portions 725 form a part of the staircase shape or the entire staircase shape. It includes a first wall 725A, a second wall 725B, a third wall 725C, and a fourth wall 725D. The first wall 725A is a wall located between the first flat surface 723A and the second flat surface 723B. The second wall 725B is a wall located between the second flat surface 723B and the third flat surface 723C. The third wall 725C is a wall located between the third flat surface 723C and the fourth flat surface 723D. The fourth wall 725D is a wall extending from the fourth flat surface 723D. Each of the first wall 725A, the second wall 725B, the third wall 725C, and the fourth wall 725D can reflect light.

For example, as shown in FIG. 14, the first wall 725A reflects light L2. The light reflected by the first wall 725A is further reflected by the reflector 8. By repeating the reflection of the light L2 on the reflector 8, the light L2 is diffused or attenuated. The diffused or attenuated light L2 hardly reaches the irradiated surface. On the other hand, the light L1 shown in FIG. 13 is not reflected by the wall portion 725 and heads toward the irradiation surface. Therefore, the region desired by the designer can be irradiated with the light L. As a result, uneven illuminance on the irradiated surface due to flare can be suppressed.

[Embodiment 4]
Next, the light source unit 7 of the fourth embodiment will be described with reference to FIGS. 15 and 16. The light source unit 7 of the fourth embodiment is different from the light source unit 7 of the first embodiment and the light source unit 7 of the second embodiment in that the surrounding portion 722 has a stepped shape. Further, it is different from the light source unit 7 of the third embodiment in that the surrounding portion 722 of the light source unit 7 of the fourth embodiment has a rectangular shape. Hereinafter, the matters different from those of the first to third embodiments will be described with respect to the fourth embodiment, and the description of the parts overlapping with the first to third embodiments will be omitted. FIG. 15 is a plan view showing the light source unit 7 of the fourth embodiment. FIG. 16 is a diagram showing an XVI-XVI cross section of the light source unit 7 of FIG.

As shown in FIGS. 15 and 16, the main body portion 721 of the fourth embodiment has a surrounding portion 722 surrounding the opening 730. The surrounding portion 722 has a staircase shape in a cross-sectional view.

The surrounding portion 722 has a plurality of first surface portions 723 and a plurality of wall portions 725. The plurality of first surfaces 723 are flat surfaces. Specifically, as shown in FIG. 16, the plurality of first surfaces 723 are surfaces along a direction orthogonal to the opening direction of the opening 730. The opening direction of the opening 730 is along the thickness direction Z of the socket 720. The direction orthogonal to the opening direction of the opening 730 is the direction along the direction D. Therefore, since there is no inclined surface inclined from the outside of the opening 730 toward the light source 711 toward the substrate 712, unnecessary reflection of the light emitted from the light source 711 can be reduced. As a result, uneven illuminance due to flare on the irradiated surface can be suppressed.

Specifically, the positions of the surfaces of the plurality of first surfaces 723 become higher toward the holding portion 760 from the opening 730. The plurality of first flat surfaces 723 include a first flat surface 723A, a second flat surface 723B, a third flat surface 723C, a fourth flat surface 723D, and a fifth flat surface 723E. The first flat surface 723A is a surface located between the opening 730 and the second flat surface 723B. The height of the first flat surface 723A substantially coincides with the height of the light source 711. The second flat surface 723B is a surface located between the first flat surface 723A and the third flat surface 723C. The third flat surface 723C is a surface located between the second flat surface 723B and the fourth flat surface 723D. The fourth flat surface 723D is a surface located between the third flat surface 723C and the fifth flat surface 723E. The fifth flat surface 723E is a surface located between the fourth flat surface 723D and the holding wall 761. The fifth flat surface 723E supports the flat plate 750.

The height of the first surface 722A that supports the flat plate 750 is the same as the height of the surrounding portion 722 of the first embodiment shown in FIG. 7. Therefore, the distance R between the flat plate 750 and the light source 711 is not changed. The surrounding portion 722 may have a plurality of first surfaces 723 or a plurality of second surfaces 724.

The plurality of wall portions 725 form a part of the staircase shape or the entire staircase shape. The plurality of wall portions 725 include a first wall 725A, a second wall 725B, a third wall 725C, and a fourth wall 725D. The first wall 725A is a wall located between the first flat surface 723A and the second flat surface 723B. The second wall 725B is a wall located between the second flat surface 723B and the third flat surface 723C. The third wall 725C is a wall located between the third flat surface 723C and the fourth flat surface 723D. The fourth wall 725D is a wall located between the fourth flat surface 723D and the holding wall 761. Each of the first wall 725A, the second wall 725B, the third wall 725C, and the fourth wall 725D can reflect light.

For example, as shown in FIG. 16, the first wall 725A reflects light L5. The light L5 reflected by the first wall 725A is further reflected by the reflector 8. By repeating the reflection of the light L5 on the reflector 8, the light L5 is diffused or attenuated. The diffused or attenuated light L5 hardly reaches the irradiated surface.

Further, as shown in FIG. 16, the holding wall 761 of the fourth embodiment reflects light L7. The light L7 reflected by the holding wall 761 is further reflected by the reflector 8. By repeating the reflection of the light L7 on the reflector 8, the light L7 is diffused or attenuated. The diffused or attenuated light L7 hardly reaches the irradiated surface.

On the other hand, the light L6 is not reflected by the wall portion 725 and heads toward the irradiation surface. Therefore, the region desired by the designer can be irradiated with the light L. As a result, uneven illuminance on the irradiated surface due to flare can be suppressed.

[Embodiment 5]
Next, the light source unit 7 of the fifth embodiment will be described with reference to FIG. The light source unit 7 of the fifth embodiment is different from the light source unit 7 of the first embodiment to the light source unit 7 of the fourth embodiment in the direction in which the surrounding portion 722 extends the wall portion 725. Hereinafter, the matters different from those of the first to fourth embodiments will be described with respect to the fifth embodiment, and the description of the parts overlapping with the first to fourth embodiments will be omitted. FIG. 17 is a diagram showing a cross section of the light source unit 7.

The main body portion 721 of the fifth embodiment has a surrounding portion 722 surrounding the opening 730. The surrounding portion 722 has a staircase shape in a cross-sectional view.

The surrounding portion 722 has a plurality of first surface portions 723 and a plurality of wall portions 725. The plurality of first surfaces 723 are flat surfaces. Therefore, since there is no inclined surface inclined from the outside of the opening 730 toward the light source 711 toward the substrate 712, unnecessary reflection of the light emitted from the light source 711 can be reduced. As a result, uneven illuminance due to flare on the irradiated surface can be suppressed.

Specifically, the positions of the surfaces of the plurality of first surfaces 723 become higher toward the holding wall 761 from the opening 730. The plurality of first flat surfaces 723 include a first flat surface 723A, a second flat surface 723B, a third flat surface 723C, and a fourth flat surface 723D. The first flat surface 723A is a surface located between the opening 730 and the second flat surface 723B. The height of the first flat surface 723A substantially coincides with the height of the light source 711. The second flat surface 723B is a surface located between the first flat surface 723A and the third flat surface 723C. The third flat surface 723C is a surface located between the second flat surface 723B and the fourth flat surface 723D. The fourth flat surface 723D is a surface located between the third flat surface 723C and the holding wall 761. The fourth flat surface 723D supports the flat plate 750.

The plurality of wall portions 725 form a part of the staircase shape or the entire staircase shape. The plurality of wall portions 725 include a first wall 726A, a second wall 726B, and a third wall 726C. The first wall 725A is a wall located between the first flat surface 723A and the second flat surface 723B. The second wall 725B is a wall located between the second flat surface 723B and the third flat surface 723C. The third wall 725C is a wall located between the third flat surface 723C and the fourth flat surface 723D. The first wall 726A, the second wall 726B, and the third wall 726C extend away from the opening 730 so that the opening 730 has an acute angle θ with respect to the opening direction E.

For example, the first wall 726A reflects light. The light reflected by the first wall 726A is further reflected by the reflector 8. The light is diffused or attenuated by repeating the reflection of the light on the reflector 8. Diffused or attenuated light hardly reaches the irradiated surface. On the other hand, the light that is not reflected by the wall portion 725 goes toward the irradiation surface. Therefore, the area desired by the designer can be irradiated with light. As a result, uneven illuminance on the irradiated surface due to flare can be suppressed.

[Embodiment 6]
Next, the light source unit 7 of the sixth embodiment will be described with reference to FIG. The light source unit 7 of the sixth embodiment is different from the light source unit 7 of the first embodiment to the light source unit 7 of the fifth embodiment in that the shape of the flat plate 750 is not rectangular. Hereinafter, the items different from the first to fifth embodiments will be described with respect to the sixth embodiment, and the description of the parts overlapping with the first to fifth embodiments will be omitted. FIG. 18 is a perspective view showing the light source unit 7 of the sixth embodiment.

The flat plate 750 of the fourth embodiment has a plurality of sides 755. The plurality of sides include a straight side 755A and an arc side 755B. The straight side 755A is a side extending along the terminal holding portion 780. The end face 751 of the flat plate 750 corresponding to the side 755A of the straight line faces the terminal holding portion 780. Therefore, it is possible to prevent the flat plate 750 from moving from the opening 730 to the terminal holding portion 780 side.

The side 755B of the arc comes into contact with the fixing portion 770. Specifically, the end face 751 corresponding to the side 755B of the arc abuts on the fixed portion 770. Further, the exit surface 752B facing the side 755B of the arc comes into contact with the fixed portion 770. Therefore, the movement in the direction from the opening 730 to the fixed portion 770 can be restricted. Further, the movement in the direction from the opening 730 to the fixed portion 770 can be restricted. As a result, it is possible to prevent the flat plate 750 from separating from the holding portion 760.

The embodiments 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 embodiments without departing from the gist thereof. In addition, various inventions can be formed by appropriately combining the plurality of components disclosed in each of the above embodiments. For example, some components may be removed from all the components shown in the embodiments. Furthermore, components over different embodiments may be combined as appropriate. In order to make the drawings easier to understand, each component is schematically shown, and the thickness, length, number, spacing, etc. of each component shown are actual for the convenience of drawing creation. Is different. Further, the speed, material, shape, dimensions, etc. of each component shown in the above embodiment are merely examples, and are not particularly limited, and various changes can be made within a range that does not substantially deviate from the configuration of the present invention. It is possible.

(1) The surrounding portion 722 of the second embodiment is inclined so as to decrease in height from the opening 730 toward the holding portion 760, but the present invention is not limited to this. For example, the surrounding portion 722 may have a staircase shape in which the height decreases from the opening 730 to the holding portion 760.

(2) The luminaire 100 having the socket 720 of the present invention of the first embodiment is embedded in a ceiling (not shown), but is not limited thereto. The socket 720 of the present invention can be adopted as a socket for a ceiling-mounted light that is mounted on the ceiling without being embedded in the ceiling (not shown) and a socket for a wall-mounted light that is mounted on the wall.

The present invention can be used in the fields relating to socket units, light source units, luminaires and sockets.

7: Light source unit 72: Socket unit 100: Lighting equipment 711: Light source 712: Board 720: Socket 721: Main body 722: Surrounding part 723: First surface 724: Second surface 730: Opening 750: Flat plate 751: End surface 760: Holding part 761: Holding wall 770: Fixed part 780: Terminal holding part 782: Tip holding part 785: Terminal 787: Tip Z: Thickness direction

Claims (9)

Socket and
Equipped with a flat plate that transmits light
The socket
A main body with an opening through which the light source can be exposed,
A socket unit including a holding portion for holding the flat plate at a position covering the opening. The socket unit according to claim 1, wherein the holding portion faces the end surface of the flat plate. The socket unit according to claim 1 or 2, wherein the holding portion has a wall portion extending along an end surface of the flat plate. The holding portion has a fixing portion and
The socket unit according to claim 3, wherein the fixing portion faces the main surface of the flat plate and fixes the flat plate to the socket. The main body further includes a surrounding portion, and the main body portion further includes a surrounding portion.
The surrounding part is
Spreading from the opening toward the outside of the opening along a direction intersecting the thickness direction of the main body,
The socket unit according to any one of claims 1 to 4, wherein the flat plate is supported by the surrounding portion. The socket unit according to any one of claims 1 to 4, wherein the flat plate has a rectangular shape. The socket unit according to any one of claims 1 to 6, and the socket unit.
A light source unit that includes a light source. A luminaire comprising the light source unit according to claim 7. A main body with an opening through which the light source can be exposed,
A socket comprising a holding portion for holding a flat plate that transmits light at a position covering the opening.

Images