JP7383426B2 - Sockets, light source units and lighting equipment - Google Patents

Description

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

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

Japanese Patent Application Publication No. 2015-118797

However, in the LED module socket described in Patent Document 1, the inclined surface of the socket body widens from the center hole of the socket body toward the side where the light-transmitting cover body is arranged with respect to the light-emitting part of the LED module. . Therefore, unnecessary light out of the light emitted from the LED module is reflected on the inclined surface, and the reflected light is emitted from the lighting fixture and reaches the irradiation surface. This causes illuminance unevenness on the irradiation surface.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a socket, a light source unit, and a lighting fixture that can suppress uneven illuminance on an irradiation surface.

The socket disclosed in this application includes a main body and a wall. The main body has an opening through which light emitted from the light source can pass. The wall reflects the light that has passed through the opening. The main body portion includes a surrounding portion that surrounds the opening and extends from an edge of the opening in a direction perpendicular to a direction in which the opening opens. The wall portion extends from the surrounding portion in a direction parallel to the opening direction of the opening portion, and is disposed at a position away from the opening portion.

The socket disclosed in this application includes a plurality of the wall portions. It is preferable that the plurality of walls constitute a part of the staircase shape or the entire staircase shape.

In the socket disclosed in the present application , the surrounding portion surrounds the opening. The surrounding portion has a step-like shape and extends in a direction that widens away from the opening.

The socket disclosed in the present application includes a main body portion, a wall portion, and a terminal holding portion. The main body has an opening through which light emitted from the light source can pass. The wall reflects the light that has passed through the opening. The terminal holding portion holds the terminal while covering the terminal in contact with the substrate. The wall portion is a first wall portion that extends away from the opening along the thickness direction of the main body, or the opening extends at an acute angle with respect to the direction in which the opening is open. A second wall portion extending away from the portion. The terminal holding portion is located outside the wall portion with respect to the opening portion . The terminal holding section has a tip holding section that holds the tip of the terminal. The tip holding portion has a stepped shape. The step shape of the tip holding portion extends toward the opening.

The light source unit disclosed in this application includes the socket and a light source.

The lighting fixture disclosed in this application includes the above light source unit.

According to the socket, light source unit, and lighting fixture of the present invention, it is possible to suppress uneven illuminance on the irradiation surface.

1 is a perspective view showing a lighting fixture according to Embodiment 1 of the present invention. 2 is a diagram showing a cross section taken along II-II of the lighting fixture shown in FIG. 1. FIG. 1 is a perspective view showing a light source unit in Embodiment 1. FIG. FIG. 3 is an exploded perspective view showing the light source unit with the flat plate separated from the socket in Embodiment 1. FIG. 3 is a plan view showing the light source unit in a state where the flat plate is separated from the socket in Embodiment 1. FIG. 2 is a plan view showing a light source unit holding a flat plate in Embodiment 1. FIG. 7 is a diagram showing a VII-VII cross section of the light source unit shown in FIG. 6. FIG. (a) It is a schematic diagram of the lighting fixture which employ|adopted the socket based on Embodiment 1. (b) It is a schematic diagram which shows the illumination intensity of the light which the lighting fixture 100 of Fig.8 (a) radiate|emitted. FIG. 2 is a perspective view showing a conventional socket. FIG. 2 is a schematic diagram of a lighting fixture that uses a conventional socket. (a) is a schematic diagram of a lighting fixture that employs a conventional socket. (b) shows a schematic diagram showing an irradiation surface when the lighting fixture shown in FIG. 10(a) irradiates light. (c) is a schematic diagram showing the illuminance on the irradiation surface shown in FIG. 10(b). 7 is a diagram showing a cross section taken along the line XI-XI of the light source unit shown in FIG. 6. FIG. It is a figure showing the light source unit concerning Embodiment 2 of the present invention. It is a perspective view which shows the socket of Embodiment 3 of this invention. FIG. 7 is a schematic diagram of a lighting fixture that employs the socket of Embodiment 3. FIG. 7 is a plan view showing a light source unit according to Embodiment 4 of the present invention. 16 is a diagram showing a cross section taken along the line XVI-XVI of the light source unit shown in FIG. 15. FIG. It is a figure which shows the cross section of the light source unit based on Embodiment 5 of this invention. It is a perspective view which shows the light source unit of Embodiment 6 of this invention.

Embodiments of the present invention will be described below with reference to the drawings. However, the present invention is not limited to the following embodiments. Note that the description may be omitted as appropriate for parts where the description overlaps. Further, in the drawings, the same or corresponding parts are given the same reference numerals and the description will not be repeated.

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

As shown in FIG. 1, the lighting fixture 100 includes a lighting fixture body 1, a support section 2, a mounting member 3, and a power supply section (not shown). The lamp body 1 has a heat sink 6 . The support part 2 has a fixed frame 4 and a rotating frame 5. The rotating frame 5 has a light leakage regulating section 51 .

The lamp body 1 emits light L. The support portion 2 supports the lamp body 1. The support portion 2 of this embodiment supports the lamp body 1 in a rotatable and tiltable manner. More specifically, the fixed frame 4 rotatably supports the rotary frame 5, and the rotary frame 5 supports the lamp body 1 in a tiltable manner.

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 regulating portion 51 of the rotating frame 5 is a portion of the rotating frame 5 that has a larger vertical width (dimension) than other portions of the lamp body 1 . The other parts are parts other than the light leakage regulating section 51. Note that the vertical direction indicates, for example, a direction along the direction from the heat sink 6 toward the rotating frame 5. Note that in the lighting fixture 100 of the present embodiment, the fixed frame 4 rotatably supports the rotary frame 5, and the rotary frame 5 supports the lamp body 1 in a tiltable manner, but the present invention is not limited to this. The lighting fixture 100 of this embodiment may have a configuration without the rotating frame 5, and the rotating frame 5 does not need to be rotatable and the lamp body 1 does not need to be tiltable.

The light leakage regulating section 51 regulates 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 regulating portion 51 covers a gap between the lamp body 1 and the rotating frame 5 so that no gap is generated when the lamp body 1 is tilted. Alternatively, the light leakage regulating section 51 further reduces the gap created between the lamp body 1 and the rotating frame 5 when the lamp body 1 is tilted. According to this embodiment, since the rotating frame 5 has the light leakage regulating portion 51, the light L is less likely to leak into the ceiling when the lamp body 1 is tilted. Therefore, even if the lamp body 1 is tilted, the light efficiency of the lighting apparatus 100 is unlikely to decrease. Note that, in order to suppress a decrease in the light efficiency of the lighting fixture 100, the inner surface of the light leakage regulating portion 51 is preferably painted white. Alternatively, the inner surface of the light leakage regulating section 51 is preferably a mirror surface.

The attachment member 3 attaches the lamp body 1 to the attachment position. Specifically, the attachment member 3 is fixed to the support part 2 and attaches the support part 2 to the attachment position. By attaching the support portion 2 to the attachment position, the lamp body 1 can be attached to the attachment position. In this embodiment, the mounting position is, for example, a ceiling (not shown).

Specifically, the mounting member 3 is a long plate-like member, and its base end is fixed to the fixed frame 4 with screws B1. The mounting member 3 protrudes from the fixed frame 4 to the outside in the radial direction of the fixed frame 4 when the lighting fixture 100 is not attached to a ceiling (not shown). The mounting member 3 can be bent in a direction in which the distal end thereof approaches the lamp body 1. When the lighting fixture 100 is attached to a ceiling (not shown), the attachment member 3 is bent and generates a biasing force toward the outside in the radial direction. This biasing force allows the lighting fixture 100 to be attached to the ceiling (not shown). The mounting member 3 is, for example, a plate spring. Note that the attachment member 3 may be a wire spring.

The lighting fixture 100 of this embodiment includes two mounting members 3. In this 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 lighting fixture 100 can be mounted on a ceiling (not shown) in a stable posture. Note that the number of attachment members 3 is not particularly limited as long as it is plural. Furthermore, the positions at which the mounting members 3 are arranged are not particularly limited, and the intervals between the plurality of mounting members 3 may not be equal.

The heat sink 6 radiates heat from the lamp body 1. The heat sink 6 includes a material with high thermal conductivity. For example, the heat sink 6 is made of metal. Specifically, the heat sink 6 may be made of aluminum or an aluminum alloy.

The heat sink 6 has a plurality of heat radiation fins 61. The plurality of heat radiation fins 61 each radiate heat. Further, each of the plurality of radiation fins 61 is plate-shaped. Since the heat sink 6 has a plurality of heat sink fins 61, the specific surface area of the heat sink 6 becomes large, and the heat dissipation performance of the heat sink 6 improves.

Next, the heat sink 6 will be explained with reference to FIG. 2. FIG. 2 shows a cross section taken along II-II of the lighting fixture 100 shown in FIG.

The heat sink 6 has a case portion 62 . In this 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 from which the light L is emitted. Furthermore, the case portion 62 has a ceiling portion 621 on the side opposite to the light exit side.

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

The reflecting plate 8 reflects the light L emitted from the light source unit 7. The reflection plate 8 suppresses the light L emitted from the light source unit 7 from returning toward the light source unit 7. The reflecting plate 8 is supported by the case portion 62 of the heat sink 6 . The reflecting plate 8 has a cylindrical shape. The diameter of the inner circumferential surface 81 of the reflecting plate 8 gradually increases as it moves away from the light source unit 7. For example, the reflecting plate 8 has a substantially truncated conical shape. Specifically, the reflection plate 8 has a substantially mortar shape. It is preferable that the inner circumferential surface 81 of the reflecting plate 8 is a mirror surface.

The reflecting plate 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 aperture 82 and the second aperture 83 are lined up in the direction in which the light L is emitted. The first opening 82 and the second opening 83 have different diameters. 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 side of the irradiation surface onto which 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 exits. The reflecting plate 8 is made of, for example, synthetic resin. Moreover, the reflection plate 8 may be formed from 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. As shown in FIG. Note that FIG. 3 is a perspective view showing the light source unit 7 from the side where the reflection plate 8 is installed. FIG. 4 is an exploded perspective view showing the light source unit 7 with the flat plate 750 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 board 712. For example, 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 that is formed by sealing a plurality of LEDs with a phosphor. Note that the light emitting element is an SMD (SMD) in which an LED and a phosphor are combined into one unit to form an LED chip, and a plurality of LED chips are mounted on the mounting surface of the substrate 712 and electrically connected to the conductive pattern of the substrate 712. Surface Mount Device) type.

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

Flat plate 750 transmits light. The flat plate 750 is transparent or semi-transparent and allows the light emitted from the light source 711 to pass therethrough. For example, the flat plate 750 is a cover member that protects the light source 711. The flat plate 750 can suppress dust from adhering to the light source 711. Further, the flat plate 750 prevents the light source 711 from coming into contact with a part of the user's body. Furthermore, by suppressing contact between the light source 711 and a part of the user's body, for example, loss of the phosphor of the light emitting element and damage to the substrate 712 can be suppressed. Flat plate 750 is attached to 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 light diffusing materials. For example, the flat plate 750 is formed by providing minute irregularities on a transparent or translucent flat 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 the function of refracting light and causing it to diverge or converge.

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

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 processing steps, so that the effort required to process the flat plate 750 can be suppressed. As a result, the cover member can be easily manufactured. For example, when making a glass cover member 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, a flat glass cover member can be manufactured by simply cutting a large flat glass plate into a predetermined shape. Note that the flat plate 750 is not limited to a rectangular shape, and may have any shape such as an ellipse shape or a circular shape.

Moreover, by making the flat plate 750 into a rectangular shape, the amount of waste of the material of the flat plate 750 can be reduced. For example, when creating a plurality of elliptical flat plates from a large glass plate, the portion between adjacent elliptical flat plates becomes a discarded portion. On the other hand, when creating a plurality of rectangular flat plates 750 from a large glass plate, the waste portion between adjacent flat plates 750 is smaller than when creating elliptical flat plates. As a result, the flat plate 750 can be created while reducing the amount of material to be discarded.

The socket 720 is an electrical component that constitutes a contact point for connecting the light source module 71 to an electrical circuit. Socket 720 is formed by a contact and an insulator. Specifically, the contacts are exposed from the insulator and connected to an 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 with screws, and is configured such that the user cannot easily attach or detach it.

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

Further, the end surface 751 further includes a plurality of cutout surfaces 753. The plurality of cutout surfaces 753 are formed by cutting out corners of the flat plate 750. A corner indicates a sharp, protruding portion of the flat plate 750. For example, a rectangular flat plate 750 has four corners. The plurality of cutout surfaces 753 are formed by cutting out corners of the rectangular flat plate 750 in the direction A. That is, the end surface 751 further includes a plurality of notched surfaces 753 in addition to the first end surface 751A to the fourth end surface 751D.

When creating the flat plate 750, variations may occur in the outer shape of the flat plate 750. Further, the socket 720 may also vary in size. Due to variations in the outer shape of the flat plate 750 and variations in the size of the socket 720, the flat plate 750 and a portion of the mounting portion of the socket 720 may interfere with each other. 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 portions of the flat plate 750 may interfere with the mounting portion of the socket 720. In other words, pressure may be applied to the corner portions of the flat plate 750. Furthermore, when the assembling operator attaches the flat plate 750 to the socket 720, he or she may apply force to the corner portions of the flat plate 750 to attach the flat plate 750 to the socket 720. Therefore, pressure may be applied to the corner portions of the flat plate 750.

In the flat plate 750 of this embodiment, even if pressure is applied to the corner portions of the flat plate 750, the pressure can be received at the notch surface 753. As a result, the flat plate 750 can be prevented from being damaged at the corners, compared to a flat plate without the notch surface 753. Damage means that the flat plate 750 is broken or that the flat plate 750 is chipped.

For example, when the end surface 751 does not have the notch surface 753, a sharp and protruding corner is formed at the location where the first end surface 751A and the second end surface 751B intersect at right angles. If pressure is applied at a corner, the force may be concentrated at the corner and the flat plate may be damaged. On the other hand, when pressure is applied at the notch surface 753, the area receiving the force increases compared to the corners, and the force can be dispersed. Therefore, damage to the flat plate 750 can be suppressed.

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

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 730 and a surrounding portion 722. As shown in FIGS. The 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 through the opening 730 . Opening 730 is a through hole.

The opening 730 is a hole that penetrates 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. Direction A is a direction in which the entrance surface 752A and the exit surface 752B are lined up. Direction A includes direction A1 and direction A2. Direction A1 indicates the direction from the entrance surface 752A to the exit surface 752B. Direction A2 indicates the 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 cylindrical 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 cylindrical portion 733 is a wall between the first edge 731 and the second edge 732.

Surrounding portion 722 supports 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 becomes the distance R (see FIG. 5). Therefore, since the surrounding portion 722 supports the flat plate 750, the flat plate 750 and the light source 711 are spaced apart by the 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 lighting fixtures 100 employing the present invention have small individual differences among the lighting fixtures 100, and are substantially uniform.

Additionally, 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 that intersects the thickness direction Z of the main body portion 721 . Body portion 721 has an outer edge 729. The outer edge 729 is an edge indicating 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 part 760 holds the flat plate 750. Specifically, the holding part 760 holds the flat plate 750 at a position covering the opening 730. Therefore, it is possible to suppress dust and the like from adhering to the light source 711. Further, for example, there is no need to create parts of the lighting fixture 100 to match the dome-shaped cover member. Therefore, the degree of freedom in designing the lighting fixture 100 is improved compared to the case where a dome-shaped cover member is used.

Further, the holding portion 760 is formed in the socket 720. Then, by holding the flat plate 750 by the holding portion 760, the socket 720 and the flat plate 750 are integrated into one unit. Therefore, there is no need to separately form the holding part 760 that holds the flat plate 750 in the case part 62. As a result, the degree of freedom in designing the lighting fixture 100 is improved.

Furthermore, 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 when a dome-shaped cover member is attached to the socket 720. Further, the thickness of the socket unit 72 in which the socket 720 and the flat plate 750 are integrated into one unit is equal to the thickness of the socket 720 alone. In other words, the flat plate 750 is held by the holding portion 760 within the thickness of the socket 720. Therefore, the socket unit 72 can be made thinner.

Furthermore, since the flat plate 750 can be placed near the light source 711, the reflecting plate 8 can be placed near the light source 711 compared to the case where a 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 the output efficiency of the lighting fixture 100 is improved. The emission efficiency indicates the ratio of the amount of light emitted from the lighting fixture 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 part 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 dust from adhering to the light source 711 and suppresses contact between the light source 711 and a part of the user's body.

The holding portion 760 faces the end surface 751 of the flat plate 750, as shown in FIG. Since the end surface 751 of the flat plate 750 and the holding part 760 face each other, the holding part 760 restricts the movement of the flat plate 750 in the direction B parallel to the entrance surface 752A shown in FIG. 4, for example. As a result, it is possible to suppress the flat plate 750 from moving in the direction B parallel to the entrance surface 752A and falling off from the holding part 760.

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

Specifically, the holding wall 761 is a wall that stands up from the main body portion 721 in the direction A1. The height of the retaining wall 761 substantially matches the height of the end surface 751 of the flat plate 750. Note that the height of the retaining wall 761 may be smaller than the height of the end surface 751 of the flat plate 750.

The retaining wall 761 has a plurality of wall parts. Specifically, the retaining wall 761 includes a first retaining wall 761A, a second retaining wall 761B, a third retaining wall 761C, and a fourth retaining wall 761D. The first retaining wall 761A faces the first end surface 751A of the flat plate 750. The second retaining wall 761B faces the second end surface 751B of the flat plate 750. The third retaining wall 761C faces the third end surface 751C of the flat plate 750. The fourth retaining 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, movement of the flat plate 750 in a direction B parallel to the entrance surface 752A or a direction B parallel to the exit surface 752B can be restricted.

Further, the retaining wall 761 has a rectangular shape or a substantially rectangular shape. In other words, it has the same shape as the flat plate 750. Therefore, when positioning the flat plate 750 on the holding part 760, alignment of the holding part 760 and the flat plate 750 becomes easy. As a result, the work efficiency when holding the flat plate 750 in the holding portion 760 of the socket 720 is improved.

For example, generally when a cover member is attached to a socket, the locking portion of the socket and the locking portion of the cover member are aligned with each other and the cover member is attached to the socket. It is necessary to align the locking portion of the socket and the locking portion of the cover member, which reduces work efficiency. On the other hand, since both the retaining wall 761 and the flat plate 750 of the socket 720 of the present invention have a rectangular shape, it is easy to align them. The efficiency of assembly work when combining the socket 720 and the flat plate 750 into one unit is improved.

Further, when the holding wall 761 of the socket 720 is formed into a rectangular shape, the corner portions of the holding wall 761 may be insufficiently formed. For example, the thickness of the retaining wall 761 at the corner portions may be larger than at locations other than the corner portions. Specifically, the thickness of the corner portion may increase in the direction of the opening 730. Note that the cutout surface 753 of the flat plate 750 corresponds to the corner portion of the retaining wall 761, and thick corner portions can be avoided. Therefore, even if the corner portions of the retaining wall 761 are insufficiently formed, the retaining portion 760 can retain the flat plate 750.

Further, the first retaining wall 761A extends along the first end surface 751A of the flat plate 750. The second retaining wall 761B extends along the second end surface 751B of the flat plate 750. The third retaining wall 761C extends along the third end surface 751C of the flat plate 750. The fourth retaining wall 761D extends along the fourth end surface 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 light from being emitted from surfaces other than the emission 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 with the flat plate 750 separated from the socket 720. Note that FIG. 5 shows the light source unit 7 from the side where the reflection plate 8 is installed.

The holding part 760 further includes a rising wall 762. As shown in FIG. 4, the rising wall 762 is a wall rising 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. A fourth retaining wall 761D is located in the through hole 763. The height of the rising wall 762 substantially matches the height of the retaining wall 761.

As shown in FIG. 5, the rising wall 762 has a plurality of wall portions. Specifically, the rising wall 762 includes 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 retaining wall 761D. The second upright wall 762B extends from the end of the second retaining wall 761B on the fourth retaining wall 761D side. Specifically, the second upright wall 762B extends in a direction parallel to the second retaining wall 761B. The third upright wall 762C extends from the end of the third holding wall 761C on the fourth holding wall 761D side. Specifically, the third upright wall 762C extends in a direction parallel to the third retaining wall 761C.

The fourth rising wall 762D connects the first rising wall 762A and the fourth retaining wall 761D. The fourth upright wall 762D extends from the fourth retaining wall 761D toward the first retaining wall 761A. In other words, the fourth holding wall 761D is located at the center of the through hole 763 while being supported by the fourth rising wall 762D.

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

Therefore, when the flat plate 750 is positioned between the first retaining wall 761A to the fourth retaining wall 761D, the end of the fourth retaining wall 761D is moved in a direction approaching the first rising wall 762A. In other words, 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 surface 751 of the flat plate 750 and the holding part 760 face each other. Furthermore, 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 part 760. This makes it easier to

As shown in FIG. 5, the second retaining wall 761B and the third retaining wall 761C have a notch 765. The notch portion 765 is cut out, for example, in order to bring the tip of a flathead screwdriver into contact with the end surface 751 of the flat plate 750. For example, when separating the flat plate 750 from the holding part 760, the tip of a flat head screwdriver is brought into contact with the end surface 751 of the flat plate 750, and the flat plate 750 is elastically deformed to release the engagement state between the flat plate 750 and the fixing part 770. , it becomes easy to move in the direction A1. As a result, it becomes easy to separate the flat plate 750 from the holding part 760. Note that the fixed part 770 is elastically deformed to release the engagement state between the fixed part 770 and the flat plate 750, and the flat plate 750 is moved in the direction A1 by bringing the tip of a flathead screwdriver into contact with the end surface 751 of the flat plate 750. Good too.

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 holding the flat plate 750. 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 perpendicular to the direction C. Direction C is a 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. Direction C1 indicates the direction from the second retaining wall 761B to the third retaining wall 761C. Direction C2 indicates the direction from the third retaining wall 761C to the second retaining wall 761B. FIG. 7 is a diagram of the light source unit 7 viewed from the direction C1 from the second holding wall 761B to the third holding wall 761C. FIG. 8(a) is a schematic diagram of a lighting fixture 100 that employs a socket 720 according to this embodiment. FIG. 8A shows a lighting fixture 100 including a socket 720, a light source module 71, and a reflector 8 for convenience of explanation. FIG. 8(b) is a schematic diagram showing the illuminance of light emitted by the lighting fixture 100 of FIG. 8(a). FIG. 9 is a perspective view showing a conventional socket. FIG. 10 is a schematic diagram of a lighting fixture that uses a conventional socket. FIG. 10(a) is a schematic diagram of a lighting fixture that uses a conventional socket. FIG. 10(b) shows a schematic diagram showing an irradiation surface when the lighting fixture shown in FIG. 10(a) irradiates light. FIG. 10(c) is a schematic diagram 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 holder 735. The light source holding section 735 holds the substrate 712. The light source holding unit 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 along the direction D, for example. In other words, the first surface 723 extends in the direction D. Therefore, the surrounding portion 722 becomes a flat surface. Therefore, for example, as disclosed in Japanese Unexamined Patent Application Publication No. 2015-118797 shown in FIG. Not in 722. That is, in this embodiment, the light emitted from the light source 711 is not reflected by the inclined surface. As a result, it is possible to suppress uneven illuminance caused by flare caused by light reflected on the inclined surface.

Furthermore, as shown in FIG. 8, the retaining wall 761 can reflect the light that has passed through the opening 730. The retaining wall 761 corresponds to an example of a "wall part". The retaining wall 761 extends away from the opening 730 along the thickness direction Z of the main body portion 721 . Furthermore, the retaining wall 761 corresponds to an example of a "first wall section."

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. Also, when taking out the solidified resin, the assembled molds are disassembled. Generally, a draft angle is set in the mold in order to easily take out the solidified resin from the mold. Therefore, the retaining wall 761 of the socket 720 may have a slope along the draft angle of the mold. Therefore, the first wall portion of the present invention includes not only the first wall portion extending in a direction parallel to the thickness direction Z of the main body portion 721 but also the holding wall 761 extending in a direction along the draft angle of the mold. Included in the wall.

The light that has passed through the opening 730 includes light L1 directed toward the irradiation surface, as well as light directed toward other than the irradiation surface. The light L2 is a part of the light directed toward other than the irradiation surface. When the light L2 directed toward a direction other than the irradiation surface irradiates an area different from the irradiation area desired by the designer, flare occurs and causes uneven illuminance. For example, the retaining wall 761 reflects at least part of the light L2 directed toward other than the irradiation surface. Since the retaining wall 761 is located close to the light source 711, the incident angle and reflection angle of light on the retaining wall 761 are small. Therefore, most of the light L2 reflected by the retaining wall 761 is further reflected elsewhere. The other location is, for example, a location other than the retaining wall 761. Places other than the retaining wall 761 may be, for example, the socket 720 and the reflecting plate 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 longer. The longer the optical path length, the more the light L2 is diffused or attenuated. Therefore, it is possible to diffuse or attenuate the light L2 directed toward an area different from the irradiation area desired by the designer. As a result, the amount of light L2 that reaches the irradiation surface becomes very small, suppressing the occurrence of flare on the irradiation surface and suppressing uneven illuminance.

Further, as shown in FIG. 8A, the light L2 reflected by the holding wall 761 is further reflected by the reflection plate 8, for example. Therefore, the optical path length of the light L2 reflected by the reflection plate 8 becomes even 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, illuminance unevenness can be further suppressed.

For example, as shown in graph G1 of FIG. 8(b), uneven illuminance can be suppressed. Graph G1 shown in FIG. 8(b) is a graph showing the relationship between illuminance (lx) and position P. The positions P shown in the graph G1 include positions A to G. Position A, position B, position F, and position G shown in FIG. 8(b) are positions different from the irradiation area of light L1. Positions C to E are the irradiation area of the 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 value of the illuminance that can be detected in the irradiation area of the light L1 is reached.

As shown in FIG. 8(b), almost no light L2 reaches the irradiation surface. In other words, most of the light that reaches the irradiation surface becomes light L1. Therefore, it is possible to suppress uneven illuminance that occurs when the light L2 reaches the irradiation surface.

On the other hand, a socket 201 (hereinafter sometimes referred to as a conventional example) disclosed in Japanese Patent Application Laid-open No. 2015-118797 shown in FIG. 9 reflects light on an inclined surface 202. Since the light reflected by the inclined surface 202 is not sufficiently attenuated, most of the light reaches the irradiation surface. In other words, the light reaches an area different from the irradiation area 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. 10(a), the light emitted from the conventional light source 204 includes light L3 directed toward the irradiation surface, and light L3 directed toward the sloping surface 202, reflected by the slanted surface 202, and directed toward the irradiation surface. Including L4.

The irradiation surface shown in FIG. 10(b) includes a first region L10 and a second region L20. The first area L10 indicates an area where the light L3 reaches. The first region L10 is located inside the second region L20. The second area L20 indicates an area where the light L4 reaches. The second area L20 indicates an area outside the first area L10. The second region L20 surrounds the first region L10.

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

Position A and 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 among the illuminances 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 among the illuminances that can be detected in the second region L20. Position C and position E are the boundary portions between the first region L10 and the second region L20. That is, position C and 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 among the illuminances that can be detected in the second region L20. Furthermore, the illuminance at position C and the illuminance at position E are the smallest values among the illuminances that can be detected in the first region L10. Position D is the middle part of the first region L10. The illuminance at 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, 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 L4 having different illuminance from the light L3 reaches the irradiation surface, uneven illuminance occurs on the irradiation surface. Due to the uneven illuminance, the irradiation pattern of the light irradiated onto the irradiation surface becomes donut-shaped, as shown in FIG. 10(b). As described with reference to FIGS. 9 and 10, the conventional socket cannot suppress uneven illuminance.

On the other hand, in the lighting fixture 100 that employs the socket 720 of this embodiment, as shown in FIG. 8(b), 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. 10(b). Therefore, in the lighting fixture 100 of this embodiment, the illuminance detected at positions A to C and positions E to G shown in FIG. 8B is considerably low. Therefore, the irradiation pattern of the lighting fixture 100 that employs the socket 720 of this embodiment has a shape as shown by the first region L10. Therefore, the socket 720 of this embodiment can suppress uneven illuminance.

The socket 720 will now be described in more detail with reference to FIGS. 6 and 7. As shown in FIGS. 6 and 7, the holding part 760 has a fixing part 770. The fixed portion 770 faces the output surface 752B of the flat plate 750. The fixing part 770 fixes the flat plate 750 to the main body part 721. That is, the fixing part 770 fixes the flat plate 750 to the socket 720. Therefore, the fixing part 770 restricts the movement of the flat plate 750 in the A1 direction. As a result, flat plate 750 can be prevented from falling off from holding section 760.

The fixing part 770 includes a plurality of first fixing parts 771 and a plurality of second fixing parts 772, as shown in FIG. The plurality of first fixing parts 771 and the plurality of second fixing parts 772 have, for example, a snap-fit structure.

The plurality of first fixing parts 771 are arranged on the first retaining wall 761A. For example, as shown in FIG. 6, two of the plurality of first fixing parts 771 are arranged on the first holding wall 761A. Moreover, one of the plurality of first fixing parts 771 is located at one of the ends of the first retaining wall 761A. Further, the other of the plurality of first fixing parts 771 is located at the other end of the first retaining 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 retaining wall 761A along the direction A1 of the main body portion 721. The base portion 771A positions the claw portion 771B at a higher position than the output surface 752B of the flat plate 750.

The claw portion 771B extends along the direction D. Direction D is a direction in which the first holding wall 761A and the fourth holding wall 761D shown in FIG. 6 are lined up. Direction D includes direction D1 and direction D2. Direction D1 indicates the direction from the first retaining wall 761A to the fourth retaining wall 761D. Direction D2 indicates the direction from the fourth retaining wall 761D to the first retaining 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 direction C in a cross-sectional view.

The claw portion 771B has a facing surface 771C. The opposing surface 771C faces the output surface 752B of the flat plate 750. By the opposing surface 771C coming into contact with the output surface 752B, movement of the flat plate 750 in the A1 direction can be restricted. In this embodiment, an example has been described in which two first fixing parts 771 are arranged on the first holding wall 761A, but the present invention is not limited to this. The number of first fixing parts 771 may be one, or two or more.

Further, the plurality of second fixing parts 772 are arranged on the fourth retaining wall 761D. For example, as shown in FIG. 6, two of the plurality of second fixing parts 772 are arranged on the fourth retaining wall 761D. Moreover, one of the plurality of second fixing parts 772 is located at one of the ends of the fourth retaining wall 761D. Further, the other of the plurality of second fixing parts 772 is located at the other end of the fourth retaining 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 the direction A1 from the fourth retaining wall 761D. The base portion 772A positions the claw portion 772B at a higher position than the output surface 752B of the flat plate 750.

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

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

The opposing surface 772C faces the output surface 752B of the flat plate 750. By the opposing surface 772C coming into contact with the output surface 752B, movement of the flat plate 750 in the thickness direction Z of the main body portion 721 can be restricted. Therefore, since the facing surface 771C of the claw portion 771B and the facing surface 772C of the claw portion 772B face the output surface 752B, movement of the flat plate 750 in the direction A1 of the main body portion 721 can be restricted. As a result, it is possible to further prevent flat plate 750 from falling off from 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 while the flat plate 750 is in contact with the slope 772D, the flat plate 750 slides on the slope 772D and is guided to the surrounding portion 722.

Specifically, the flat plate 750 is positioned on the holding part 760 so that the facing surface 771C of the first fixing part 771 and the output surface 752B of the flat plate 750 face each other. Then, the entrance surface 752A of the flat plate 750 and the inclined surface 772D of the second fixing part 772 are brought into contact. Furthermore, the flat plate 750 is pressed in the direction A2. The flat plate 750 pressed in the direction A2 presses the inclined surface 772D. By pressing the inclined surface 772D by the flat plate 750, both ends of the fourth retaining 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 entrance surface 752A of the flat plate 750 moves in the direction A2 while contacting the inclined surface 772D. Furthermore, the entrance surface 752A of the flat plate 750 abuts on the surrounding portion 722. Further, as the surrounding portion 722 and the entrance surface 752A of the flat plate 750 come into contact with each other, both ends of the fourth retaining wall 761D return 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 output surface 752B of the flat plate 750 face each other. That is, the opposing surface 771C of the first fixing part 771 and the output surface 752B of the flat plate 750 are opposed to each other, and the opposing surface 772C of the second fixing part 772 is opposed to the output surface 752B of the flat plate 750. Therefore, movement of the flat plate 750 in the direction A can be suppressed.

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

Note that since the flat plate 750 is surrounded by the first holding wall 761A to the fourth holding wall 761D, the flat plate 750 can be moved in the direction A, the direction C, and the direction D by the holding part 760 and the fixing part 770. Movement is inhibited. As a result, falling of the flat plate 750 from the holding portion 760 can be further suppressed.

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

A substrate 712 of the light source module 71 shown in FIG. 11 has a current-carrying portion 712A. The energizing section 712A is energized with a power supply section (not shown). The back side of the mounting surface of the light source 711 of the board 712 is in contact with the heat sink 6 .

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

Terminal 785 contacts current-carrying portion 712A of substrate 712. Further, the terminal 785 contacts the wiring W. The wiring W is connected to a power supply section (not shown). Therefore, the power supply voltage generated by the power supply section (not shown) can be applied to the light source 711 by the terminal 785 and the current-carrying section 712A coming into contact with each other.

The terminal 785 has a wire holding portion 786 and a tip portion 787. The wiring holding section 786 holds the wiring W led into the inside of the socket 720, as shown in FIG. The tip portion 787 comes into contact with the current-carrying portion 712A of the substrate 712, as shown in FIG.

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

The terminal holding section 780 has a main body holding section 781 and a tip holding section 782. The main body holding section 781 holds a wiring holding section 786. Therefore, positional displacement of the wiring holding portion 786 can be suppressed. As a result, it is possible to prevent the wire holding portion 786 from shifting its position and causing the wire W to fall 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 portion 787 so as to cover the tip portion 787. Therefore, the tip holder 782 covers the tip 787 so as to press the tip 787 in the direction A2. As a result, it is possible to suppress the distal end portion 787 from separating from the current-carrying portion 712A.

Further, the tip holding portion 782 has a stepped shape in cross-sectional view. The step-shaped tip holding portion 782 projects toward the opening 730. Specifically, the stepped shape of the tip holding portion 782 extends toward the opening 730. More specifically, in a cross-sectional view, the step 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 become higher from the opening 730 toward the outside of the opening 730. Therefore, since there is no slope around the opening 730 that slopes from the outside of the opening 730 toward the light source 711 toward the side where the substrate 712 is placed, unnecessary reflected light can be reduced. As a result, uneven illuminance caused by flare can be suppressed.

The stepped shape of the tip holding portion 782 is configured by 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 retaining wall 761C and the main body retaining portion 781. The first flat surface 783A is located next to the third retaining wall 761C. The second flat surface 783B is located next to the main body holding part 781. Therefore, since there is no slope around the opening 730 that slopes from the outside of the opening 730 toward the light source 711 toward the side where the substrate 712 is placed, unnecessary reflected light can be reduced. As a result, uneven illuminance caused by flare can be suppressed.

The plurality of walls 784 reflect the light L that has passed through the opening 730. The plurality of walls 784 can be considered as walls. The plurality of wall portions 784 constitute part or all of the staircase shape. The stair shape generally consists of treads and risers. In this embodiment, the wall portion 784 corresponds to a riser. When a plurality of wall portions 784 constitute a part of a staircase shape, some risers of the staircase shape become the wall portions 784. Further, when the plurality of wall portions 784 constitute the entire staircase shape, all the risers in the staircase shape become the wall portions 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 retaining 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 part 781.

Each of the plurality of walls 784 extends away from the opening 730 along direction A1. For example, the plurality of wall portions 784 reflect at least part of the light directed toward other than the irradiation surface. The light reflected by the plurality of walls 784 is further reflected at another location, and the light is diffused or attenuated. Therefore, it is possible to diffuse or attenuate light directed toward other than the irradiation surface. 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 differs from the light source unit 7 of the first embodiment in that the surrounding portion 722 of the socket 720 extends in a direction that intersects the thickness direction Z of the main body portion 721 at an acute angle. Hereinafter, regarding Embodiment 2, matters different from Embodiment 1 will be described, and description of parts overlapping with Embodiment 1 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 is 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. 6.

As shown in FIG. 12, the surrounding portion 722 of the second embodiment extends from the opening 730 toward the outside of the opening 730 in a cross-sectional view, and has a second surface extending toward the side on which the substrate 712 is disposed. 724. Specifically, the surrounding portion 722 has a second surface 724 that slopes such that the height decreases from the opening 730 toward the holding portion 760. Since the surrounding portion 722 is inclined, the distance between the opposing surface 771C and the surrounding portion 722 shown in FIG. 9 is larger than the distance between the opposing surface 771C and the surrounding portion 722 shown in FIG. Therefore, it becomes easy to position the flat plate 750 between the opposing surface 771C and the surrounding portion 722. As a result, the holding portion 760 can easily hold the flat plate 750.

Note that, in 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, or a first surface 723 extending toward the side on which the substrate 712 shown in FIG. It may have two surfaces 724. Further, in 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. 724.

[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 differs 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, regarding Embodiment 3, matters that are different from Embodiment 1 and Embodiment 2 will be described, and description of parts that overlap with Embodiment 1 and Embodiment 2 will be omitted. FIG. 13 is a perspective view showing a socket 720 according to the third embodiment. FIG. 14 is a schematic diagram of a lighting fixture 100 that employs the socket 720 of the third embodiment. In FIG. 14, a part of the configuration of the lighting fixture 100 is omitted to facilitate understanding of the invention.

The main body part 721 of the third embodiment has a surrounding part 722 surrounding an opening part 730. The surrounding portion 722 has a staircase shape. Specifically, the surrounding portion 722 has a stepped shape and extends toward the end, away from the opening 730 .

The surrounding portion 722 has a plurality of first surfaces 723 and a plurality of walls 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 perpendicular to the direction in which the opening 730 opens. The direction in which the opening 730 opens is along the thickness direction Z of the socket 720. The direction perpendicular to the opening direction of the opening 730 is, for example, a direction along direction B shown in FIG. 4 .

The plurality of first 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 constitute part or all of the 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. Each of the first wall 725A, the second wall 725B, the third wall 725C, and the fourth wall 725D corresponds to an example of a "first wall portion."

For example, as shown in FIG. 14, the first wall 725A reflects the light L2. The light reflected by the first wall 725A is further reflected by the reflecting plate 8. As the light L2 is repeatedly reflected by the reflection plate 8, the light L2 is diffused or attenuated. The diffused or attenuated light L2 hardly reaches the irradiation 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 light L can be irradiated onto the area desired by the designer. As a result, it is possible to suppress uneven illuminance on the irradiation surface due to flare.

[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 differs 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, the light source unit 7 of the fourth embodiment is different from the light source unit 7 of the third embodiment in that the surrounding portion 722 has a rectangular shape. Hereinafter, regarding Embodiment 4, matters that are different from Embodiments 1 to 3 will be explained, and descriptions of parts that overlap with Embodiments 1 to 3 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 a cross section taken along the line XVI-XVI of the light source unit 7 in FIG. 15.

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

The surrounding portion 722 has a plurality of first surfaces 723 and a plurality of walls 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 perpendicular to the direction in which the opening 730 opens. The direction in which the opening 730 opens is along the thickness direction Z of the socket 720. The direction perpendicular to the direction in which the opening 730 opens is the direction D. Therefore, since there is no inclined surface that slopes toward the substrate 712 from the outside of the opening 730 toward the light source 711, unnecessary reflection of the light emitted from the light source 711 can be reduced. As a result, it is possible to suppress uneven illuminance caused by flare on the irradiation surface.

Specifically, the positions of the plurality of first surfaces 723 become higher from the opening 730 toward the holding section 760. The plurality of first 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 matches 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 retaining wall 761. The fifth flat surface 723E supports the flat plate 750.

Note that the height of the first surface 722A that supports the flat plate 750 is the same height as the surrounding portion 722 of Embodiment 1 shown in FIG. Therefore, the distance R between the flat plate 750 and the light source 711 is not changed. Note that 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 constitute part or all of the 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 retaining wall 761. Each of the first wall 725A, the second wall 725B, the third wall 725C, and the fourth wall 725D can reflect light. Each of the first wall 725A, the second wall 725B, the third wall 725C, and the fourth wall 725D corresponds to an example of a "first wall portion."

For example, as shown in FIG. 16, the first wall 725A reflects the light L5. The light L5 reflected by the first wall 725A is further reflected by the reflection plate 8. As the light L5 is repeatedly reflected by the reflection plate 8, the light L5 is diffused or attenuated. The diffused or attenuated light L5 hardly reaches the irradiation surface.

Further, as shown in FIG. 16, the holding wall 761 of the fourth embodiment reflects the light L7. The light L7 reflected by the retaining wall 761 is further reflected by the reflecting plate 8. As the light L7 is repeatedly reflected by the reflecting plate 8, the light L7 is diffused or attenuated. The diffused or attenuated light L7 hardly reaches the irradiation surface.

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

[Embodiment 5]
Next, with reference to FIG. 17, the light source unit 7 of Embodiment 5 will be described. 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 wall portion 725 of the surrounding portion 722 extends. Hereinafter, regarding Embodiment 5, matters that are different from Embodiments 1 to 4 will be explained, and descriptions of parts that overlap with Embodiments 1 to 4 will be omitted. FIG. 17 is a diagram showing a cross section of the light source unit 7. As shown in FIG.

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

The surrounding portion 722 has a plurality of first surfaces 723 and a plurality of walls 725 . The plurality of first surfaces 723 are flat surfaces. Therefore, since there is no inclined surface that slopes toward the substrate 712 from the outside of the opening 730 toward the light source 711, unnecessary reflection of the light emitted from the light source 711 can be reduced. As a result, it is possible to suppress uneven illuminance caused by flare on the irradiation surface.

Specifically, the positions of the plurality of first surfaces 723 become higher from the opening 730 toward the retaining wall 761. The plurality of first 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 matches 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 retaining wall 761. The fourth flat surface 723D supports the flat plate 750.

The plurality of wall portions 725 constitute part or all of the 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 at an acute angle θ with respect to the direction E in which the opening 730 is open. Each of the first wall 725A, the second wall 725B, and the third wall 725C can reflect light. The first wall 726A, the second wall 726B, and the third wall 726C correspond to an example of a "second wall portion."

For example, the first wall 726A reflects light. The light reflected by the first wall 726A is further reflected by the reflecting plate 8. As the light is repeatedly reflected by the reflector 8, the light is diffused or attenuated. Diffused or attenuated light hardly reaches the illuminated surface. On the other hand, the light that is not reflected by the wall portion 725 heads toward the irradiation surface. Therefore, the designer can irradiate light onto the desired area. As a result, it is possible to suppress uneven illuminance on the irradiation surface due to flare.

[Embodiment 6]
Next, with reference to FIG. 18, the light source unit 7 of Embodiment 6 will be described. The light source unit 7 of the sixth embodiment differs 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, regarding Embodiment 6, matters that are different from Embodiments 1 to 5 will be explained, and descriptions of parts that overlap with Embodiments 1 to 5 will be omitted. FIG. 18 is a perspective view showing the light source unit 7 of Embodiment 6.

The flat plate 750 of Embodiment 4 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 part 780. An end surface 751 of the flat plate 750 corresponding to the straight side 755A faces the terminal holding portion 780. Therefore, movement of the flat plate 750 from the opening 730 toward the terminal holding portion 780 can be suppressed.

The side 755B of the arc abuts the fixing portion 770. Specifically, the end surface 751 corresponding to the side 755B of the arc abuts on the fixing part 770. Further, the output surface 752B facing the side 755B of the arc abuts on the fixing part 770. Therefore, movement in the direction from the opening 730 toward the fixed part 770 can be restricted. Furthermore, movement in the direction from the opening 730 toward the fixed portion 770 can be restricted. As a result, separation of the flat plate 750 from the holding portion 760 can be suppressed.

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 embodiments, and can be implemented in various forms without departing from the spirit thereof. Moreover, 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 deleted from all the components shown in the embodiments. Furthermore, components from different embodiments may be combined as appropriate. For ease of understanding, the drawing mainly shows each component schematically, and the thickness, length, number, spacing, etc. of each component shown in the diagram may differ from the actual one for convenience of drawing. 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 may be made without substantially departing from the configuration of the present invention. It is possible.

(1) Although the surrounding portion 722 in the second embodiment is inclined such that the height decreases from the opening 730 toward the holding portion 760, the present invention is not limited thereto. For example, the surrounding portion 722 may have a stepped shape in which the height decreases from the opening 730 toward the holding portion 760.

(2) Although the lighting fixture 100 having the socket 720 of the present invention according to the first embodiment is embedded in a ceiling (not shown), the present invention is not limited thereto. The socket 720 of the present invention can be employed as a socket for a ceiling light that is attached to the ceiling without being embedded in the ceiling (not shown), and a socket for a wall light that is attached to the wall.

INDUSTRIAL APPLICATION This invention can be utilized in the field of a socket, a light source unit, and a lighting fixture.

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

Claims (6)

a main body having an opening through which light emitted from the light source can pass;
a wall portion that reflects the light that has passed through the opening;
The main body part has a surrounding part that surrounds the opening part and extends from an edge of the opening part in a direction perpendicular to a direction in which the opening part opens,
In the socket, the wall portion extends from the surrounding portion in a direction parallel to a direction in which the opening portion opens, and is disposed at a position away from the opening portion. comprising a plurality of the wall parts,
The socket according to claim 1, wherein the plurality of walls constitute part or all of the staircase shape. The socket according to claim 1 or 2, wherein the surrounding portion has a stepped shape and extends in a direction that widens away from the opening. a main body having an opening through which light emitted from the light source can pass;
a wall that reflects the light that has passed through the opening;
a terminal holding part that holds the terminal while covering the terminal in contact with the board ;
Equipped with
The wall portion is a first wall portion that extends away from the opening along the thickness direction of the main body, or the opening extends at an acute angle with respect to the direction in which the opening is open. a second wall portion extending away from the portion;
The terminal holding part is
located outside the wall with respect to the opening;
having a tip holding part that holds the tip of the terminal,
The tip holding portion has a stepped shape,
In the socket , the step-like shape of the tip holding portion extends toward the opening. The socket according to any one of claims 1 to 4,
A light source unit that includes a light source and . A lighting fixture comprising the light source unit according to claim 5.

Images