Lighting fixtures

Abstract

To enhance a degree of freedom of a shade part.SOLUTION: A luminaire 1 comprises a light source unit 10, and a shade part 20 covering the light source unit 10. The light source unit 10 comprises a power supply terminal 121, an appliance body 111, a light emitting part 112 fixed to the appliance body 111, a power source part 113 for supplying power received via the power supply terminal 121, to the light emitting part 112, and a translucent cover 114 covering the light emitting part 112. The light source unit 10 is detachably attached to a socket 30 to be attached to a ceiling 2, via the power supply terminal 121. The shade part 20 is attached to the ceiling 2 via an attachment member (such as a screw 330) different from the power supply terminal 121.SELECTED DRAWING: Figure 4

Description

Technical Field

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[0001] The present invention relates to a lighting fixture.

Background Art

[0002] Patent Document 1 discloses a lighting fixture including an appliance body attached to an installation surface, a socket and a socket base disposed on the bottom surface of the appliance body, a light source unit fixed to the socket, and an appliance cover covering the light source unit.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0007] According to the present invention, the degree of freedom of the cap can be increased. [Brief explanation of the drawing]

[0008] [Figure 1] Figure 1 is a partially cutaway side view of a lighting fixture according to an embodiment. [Figure 2] Figure 2 is an exploded perspective view of a lighting fixture according to an embodiment. [Figure 3] Figure 3 is a perspective view of the socket portion to which the lighting fixture according to the embodiment is attached. [Figure 4] Figure 4 is a cross-sectional view of the lighting fixture and socket according to the embodiment. [Figure 5] Figure 5 is a perspective view of the metal plate of the cap according to a modified example of the embodiment. [Figure 6] Figure 6 is a perspective view showing an example of how to attach the cap according to a modified embodiment. [Figure 7] Figure 7 is a perspective view showing another example of how the cap is attached according to a modified embodiment. [Modes for carrying out the invention]

[0009] In the following, a lighting fixture according to an embodiment of the present invention will be described in detail with reference to the drawings. Note that the embodiments described below are all specific examples of the present invention. Therefore, the numerical values, shapes, materials, components, arrangement and connection configurations of components, steps, and the order of steps shown in the following embodiments are examples only and are not intended to limit the present invention. Accordingly, components in the following embodiments that are not described in an independent claim will be described as optional components.

[0010] Furthermore, each figure is a schematic diagram and not necessarily a strictly accurate representation. Therefore, for example, the scale may not necessarily match in each figure. Also, in each figure, substantially identical components are given the same reference numerals, and redundant explanations are omitted or simplified.

[0011] Furthermore, in this specification, terms indicating relationships between elements such as parallel or perpendicular, terms indicating the shape of elements such as circular or rectangular, and numerical ranges do not represent only strict meanings, but also include substantially equivalent ranges, such as differences of a few percent.

[0012] Furthermore, in this specification and the drawings, the x, y, and z axes represent the three axes of a three-dimensional Cartesian coordinate system. The z axis is perpendicular to the mounting surface (ceiling surface) of the lighting fixture. In each figure, the positive direction of the z axis is "upward," that is, towards the ceiling relative to the lighting fixture, and the negative direction of the z axis is "downward," that is, towards the floor.

[0013] Furthermore, in this specification, ordinal numbers such as "first," "second," etc., do not mean the number or order of components unless otherwise specified, but are used to avoid confusion and to distinguish similar components.

[0014] (Embodiment) [Overall configuration of lighting fixtures] First, the overall configuration of the lighting fixture 1 according to the embodiment will be explained using Figure 1.

[0015] Figure 1 is a partially cutaway side view of the lighting fixture 1 according to this embodiment. As shown in Figure 1, the lighting fixture 1 comprises a light source unit 10 and a shade 20. Figure 1 illustrates the positional relationship between the shade 20 and the light source unit 10 by partially cutting out the shade 20.

[0016] The light source unit 10 is the main body of the lighting fixture 1. The light source unit 10 is, for example, a ceiling light fixed to the ceiling 2. Specifically, the light source unit 10 is detachably attached to a socket portion 30 attached to the ceiling surface 3 of the ceiling 2 via a power supply terminal 121 (see FIG. 2).

[0017] The cap portion 20 is a member that covers the light source unit 10. The cap portion 20 changes the light distribution or light color of the illumination light emitted by the light source unit 10. The cap portion 20 is also called a shade. The cap portion 20 is attached to the ceiling 2 via an attachment member different from the power supply terminal 121.

[0018] Hereinafter, the specific configurations of the lighting fixture 1 and the socket portion 30 will be described with reference to FIGS. 2 to 4 as appropriate while referring to FIG. 1.

[0019] FIG. 2 is an exploded perspective view of the lighting fixture 1 according to the present embodiment. FIG. 3 is a perspective view of the socket portion 30 to which the lighting fixture 1 according to the present embodiment is attached. FIG. 4 is a cross-sectional view of the lighting fixture 1 and the socket portion 30 according to the embodiment.

[0020] [Light Source Unit] As shown in FIG. 2, the light source unit 10 includes a unit main body portion 110 and an adapter 120. As shown in FIGS. 2 and 4, the unit main body portion 110 has an appliance main body 111, a light emitting portion 112, a power supply portion 113, a cover 114, and a conductive pin 115.

[0021] The appliance main body 111 is a disk-shaped member made of sheet metal such as an aluminum plate or a steel plate. A white paint with a high light reflectance may be applied to the surface of the appliance main body 111 on the side where the light emitting portion 112 is disposed (that is, the lower surface when attached to the ceiling 2), or a reflective metal material may be vapor-deposited.

[0022] As shown in Figure 4, the main body of the fixture 111 has a circular opening 111a in the center for arranging the adapter 120. In a plan view, the main body of the fixture 111 has an annular mounting surface 111b of a predetermined width surrounding the opening 111a. The substrate 112a of the light-emitting unit 112 is mounted and fixed on the mounting surface 111b. Note that "plan view" means looking along the z-axis from the negative side of the z-axis.

[0023] The outer peripheral end 111c of the fixture body 111 is located on the negative side of the z-axis relative to the mounting surface 111b, and a cover 114 is attached thereto. In a plan view, the fixture body 111 has an inner peripheral portion 111d located between the annular mounting surface 111b and the opening 111a, and located on the positive side of the z-axis relative to the mounting surface 111b. This creates a space 111e between the inner peripheral portion 111d and the back surface (the main surface opposite to the light-emitting surface) of the substrate 112a of the light-emitting unit 112. The space 111e functions as a space to accommodate the leads of circuit components protruding from the back surface of the substrate 112a, or as a space for arranging the power supply unit 113.

[0024] The light-emitting unit 112 is fixed to the fixture body 111. As shown in Figure 4, the light-emitting unit 112 has a substrate 112a and a plurality of light-emitting elements 112b arranged on the main surface (light-emitting surface) of the substrate 112a.

[0025] The substrate 112a is a printed circuit board on which metal wiring patterned to a predetermined shape is provided. For example, the substrate 112a can be a resin substrate, a glass epoxy substrate, or a composite epoxy resin substrate (CEM-3). The substrate 112a is placed on the mounting surface 111b of the device body 111 and fixed by screws (not shown). The means of fixing the substrate 112a is not particularly limited. For example, the substrate 112a may be fixed to the mounting surface 111b by engaging with claws provided on the device body 111.

[0026] Multiple light-emitting elements 112b are mounted on the main surface of the substrate 112a. The multiple light-emitting elements 112b are, for example, surface-mount (SMD) type light-emitting elements in which LED (Light Emitting Diode) chips are packaged. Laser elements may be used instead of LEDs as light-emitting elements 112b. Each of the multiple light-emitting elements 112b is, for example, a white LED element containing a blue LED chip and a yellow phosphor, emitting white light, but is not limited to this. The multiple light-emitting elements 112b may include multiple types of LED elements emitting light of different colors (color temperatures). The multiple light-emitting elements 112b may be independently controlled for each light color. This enables dimming and color tuning.

[0027] Multiple light-emitting elements 112b are arranged in a ring shape on the main surface of the substrate 112a, for example. Circuit elements included in the power supply unit 113 are mounted in the central region of the substrate 112a surrounded by the light-emitting elements 112b. In other words, the light-emitting unit 112 is a power supply-integrated light-emitting module in which the light-emitting elements 112b and the power supply unit 113 are integrally configured on a single substrate 112a.

[0028] The power supply unit 113 supplies power received via the power supply terminal 121 to the light-emitting unit 112. Specifically, the power supply unit 113 converts the AC power supplied via the power supply terminal 121 into DC power suitable for the emission of light from the multiple light-emitting elements 112b and supplies it.

[0029] The power supply unit 113 includes a plurality of circuit elements (not shown). These circuit elements include, for example, capacitive elements such as electrolytic capacitors or ceramic capacitors, resistive elements, inductive elements, choke coils (choke transformers), noise filters, diodes, transistors, or integrated circuit elements.

[0030] The power supply unit 113 may be configured separately from the light-emitting unit 112. That is, the power supply unit 113 may have a separate circuit board (circuit board) from the circuit board 112a, and circuit components may be mounted on this circuit board. The power supply unit 113, which is separate from the light-emitting unit 112, is arranged, for example, in the space 111e between the inner circumference 111d of the fixture body 111 and the circuit board 112a.

[0031] The cover 114 is a translucent cover that covers the light-emitting part 112. The cover 114 has a light-diffusing function that diffuses the light emitted by the light-emitting part 112. For example, the cover 114 is made of a milky white resin material and can diffuse the light from each light-emitting element 112b and emit it to the outside. Note that the cover 114 does not have to have a light-diffusing function and may be a transparent cover.

[0032] The cover 114 is fixed to the fixture body 111. For example, the cover 114 may be fixed to the outer peripheral end 111c of the fixture body 111 using adhesive. The means of fixing the cover 114 are not particularly limited. For example, the cover 114 may be fixed to the fixture body 111 by engaging with a claw provided on the outer peripheral end 111c.

[0033] The conductive pin 115 is used for electrical connection with the adapter 120. Specifically, the conductive pin 115 is inserted into the power supply recess 122 provided on the adapter 120, thereby electrically connecting with the power supply terminal 121 of the adapter 120. As a result, the power supplied from the socket 30 is supplied to the power supply unit 113 via the power supply terminal 121, the power supply recess 122, and the conductive pin 115.

[0034] The adapter 120 is a component used to attach the light source unit 10 to the socket portion 30. As shown in Figure 2, the adapter 120 has power supply terminals 121. In this embodiment, the adapter 120 has a pair of power supply terminals 121. In a plan view, the pair of power supply terminals 121 are arranged point-symmetrically with respect to the center of the adapter 120.

[0035] The pair of power supply terminals 121 are made of a metallic material and are conductive. That is, the pair of power supply terminals 121 receive power supplied from the socket portion 30 and supply it to the power supply unit 113 of the light source unit 10.

[0036] Furthermore, each of the pair of power supply terminals 121 protrudes toward the ceiling 2 and is a hook-shaped member that is bent at its tip. The pair of power supply terminals 121 are inserted into and locked into the support portion 311 (see Figure 3) of the socket portion 30. The adapter 120 is supported by the socket portion 30 as the pair of power supply terminals 121 are supported by the socket portion 30.

[0037] The adapter 120 is inserted into the opening 111a of the fixture body 111 and fixed to the fixture body 111. This fixes the unit body 110 to the socket 30 via the adapter 120.

[0038] As shown in Figure 4, the adapter 120 is provided with a power supply recess 122 into which the conductive pins 115 of the unit body 110 are inserted. Figure 4 shows an example in which three sets of conductive pins 115 and power supply recesses 122 are provided, but the number of sets of conductive pins 115 and power supply recesses 122 is not particularly limited.

[0039] [Kasabe] The shade 20 is a component that covers the light source unit 10. The shade 20 is provided to adjust at least one of the light distribution, light intensity, and light color of the light emitted by the light source unit 10. By providing the shade 20, the overall appearance (design) of the lighting fixture 1 can be significantly changed. The shape, size, and function of the shade 20 can be appropriately changed according to the desired impression.

[0040] In this embodiment, as shown in Figure 2, the cap portion 20 comprises a cap body 210 and a metal plate 220. That is, the cap portion 20 is formed using two different components.

[0041] The shade body 210 is configured in a cylindrical shape with a top so as to house the light source unit 10 inside. Specifically, the shade body 210 includes a top surface portion 211 and side wall portions 214.

[0042] The top surface portion 211 is an example of the first plate portion. An opening 215 larger than the socket portion 30 is provided in the center of the top surface portion 211. The opening 215 is an example of the first opening. The shape of the opening 215 is, for example, circular, but may also be rectangular and is not particularly limited.

[0043] The top portion 211 has an inner circumference portion 212 and an outer circumference portion 213. The inner circumference portion 212 is an annular portion of a predetermined width that surrounds the opening 215. The outer circumference portion 213 is an annular portion of a predetermined width that surrounds the inner circumference portion 212. The outer circumference portion 213 is located on the positive side of the z-axis than the inner circumference portion 212. That is, when the cap portion 20 is attached to the ceiling 2, the outer circumference portion 213 is located closer to the ceiling surface 3 than the inner circumference portion 212.

[0044] As shown in Figure 4, the gap between the outer periphery 213 of the cap 20 and the ceiling surface 3 is sufficiently small. For example, the outer periphery 213 and the ceiling surface 3 may be in contact. This makes it difficult for foreign objects to enter the gap, thereby suppressing the occurrence of malfunctions and other problems caused by foreign objects.

[0045] The side wall portion 214 is a cylindrical wall portion that extends downward from the outer peripheral end of the outer peripheral portion 213. The side wall portion 214 has, for example, a frustoconical shape, with its inner and outer diameters being larger on the floor (not shown) side than on the ceiling 2 side. The lower end of the side wall portion 214 is located below the lower end of the light source unit 10. That is, as shown in Figure 1, when the lighting fixture 1 is viewed from the side, the light source unit 10 covered by the shade portion 20 is not visible.

[0046] The shape of the side wall portion 214 is not particularly limited. For example, the side wall portion 214 may have a cylindrical shape, or it may extend vertically downward from the ceiling 2 toward the floor. The plan view shape of the side wall portion 214 does not have to be circular, but may be a square, rectangle, or other polygon, or it may be elliptical.

[0047] The canopy body 210 is integrally formed, for example, by injection molding using a resin material. That is, the top surface 211 and the side wall 214 are integrally formed using the same material.

[0048] The shade body 210 is translucent. The shade body 210 has a light-diffusing function that diffuses the light emitted by the light source unit 10. For example, the shade body 210 is made of a milky white resin material and can diffuse the light from the light source unit 10 and emit it to the outside. However, the shade body 210 does not have to have a light-diffusing function and may be transparent.

[0049] The shade body 210 may have a function to change the light color. For example, the shade body 210 may contain a phosphor material that is excited by light from the light source unit 10 and emits light of a different wavelength. Alternatively, the shade body 210 may contain a light-absorbing material that absorbs light of a predetermined wavelength. The phosphor material or light-absorbing material is coated on the surface of the shade body 210 or dispersed inside the shade body 210.

[0050] Furthermore, the shade body 210 may have light-shielding properties. That is, the shade body 210 may block the light emitted by the light source unit 10. For example, the shade body 210 may be formed from a metal material that does not transmit light, or a metal film may be provided on the surface of a resin substrate.

[0051] In this embodiment, the canopy body 210 is indirectly fixed to the ceiling 2 of the canopy portion 20. Specifically, the canopy body 210 is fixed to the ceiling 2 via a metal plate 220 and a socket portion 30.

[0052] The main body of the roof 210 is fixed to the metal plate 220 by screws 240 (see Figure 4). For example, as shown in Figure 2, the inner circumference 212 is provided with screw holes 216 for inserting the screws 240. For example, there are four screw holes 216, but the number and arrangement are not particularly limited. Since the inner circumference 212 is located on the negative side of the z-axis than the outer circumference 213, a space is formed between the inner circumference 212 and the ceiling surface 3. The heads of the screws 240 are housed in this space, so that contact between the screws 240 and the ceiling surface 3 can be avoided.

[0053] The metal plate 220 has a plate body 221. The plate body 221 is an example of a second plate portion that is harder than the first plate portion. That is, the plate body 221 is harder than the top surface portion 211 of the cap body 210. For example, the top surface portion 211 is formed using a resin material, while the plate body 221 is formed using a metal material. The plate body 221 is formed using, for example, iron or stainless steel.

[0054] The plate body 221 is a flat plate with a circular shape in plan view. The shape and size of the plate body 221 are not particularly limited. An opening 225 is provided in the center of the plate body 221. The opening 225 is an example of a second opening smaller than the first opening. The shape of the opening 225 is, for example, circular, but may also be rectangular, and is not particularly limited.

[0055] The main body of the plate 221 is superimposed so that the centers of the opening 225 and the opening 215 of the main body of the cap 210 coincide. Since the opening 225 is smaller than the opening 215, when viewed from the positive side of the z-axis (ceiling 2 side), the inner circumference of the main body of the plate 221 is exposed at the opening 215. A through hole 227 and a slit 228 are provided in this inner circumference. The through hole 227 is an example of a first through hole. As shown in Figure 2, the slit 228 extends from the through hole 227 and is narrower than the through hole 227. Two sets of through holes 227 and slits 228 are provided.

[0056] The two sets of through holes 227 and slits 228 are arranged point-symmetrically with respect to a predetermined point, which is, for example, the center of the opening 225. The slits 228 extend along an arc centered on the predetermined point. The through holes 227 and slits 228 are used to attach the cap portion 20 to the socket portion 30. The specific attachment method will be described later.

[0057] The metal plate 220 is fixed to the canopy body 210 by screws 240. The plate body 221 is provided with screw holes 226 that overlap with the screw holes 216 of the canopy body 210. For example, there are four screw holes 226, but the number and arrangement are not particularly limited.

[0058] [Socket part] The socket part 30 is attached to the ceiling 2. The socket part 30 is also called a hook rosette or hook ceiling.

[0059] As shown in Figures 2 and 3, the socket portion 30 includes a housing portion 310, a support plate portion 320, and a screw 330.

[0060] The housing portion 310 is provided with a support portion 311. The support portion 311 supports the light source unit 10 by inserting and fixing the power supply terminal 121 of the light source unit 10 into it. The support portion 311 is a recess provided on the lower surface of the housing portion 310 and has a conductive part (not shown) inside which the power supply terminal 121 makes contact. This conductive part is connected to, for example, a commercial power supply and supplies power (AC power) from the commercial power supply to the light source unit 10 via the power supply terminal 121.

[0061] The support portion 311 is provided in a pair, similar to the power supply terminal 121. The pair of support portions 311 are provided point-symmetrically with respect to the center of the socket portion 30. The support portion 311 is an arc-shaped slit provided along the arc that is the center of the socket portion 30. The support portion 311 has a wide portion 311a that is wider than the width of the power supply terminal 121 and a narrow portion 311b that is narrower than the width of the power supply terminal 121.

[0062] The support plate portion 320 is formed from a metal material such as iron or stainless steel. The support plate portion 320 is fixed to the housing portion 310 by screws or the like. The support plate portion 320 is also fixed to the ceiling 2. The socket portion 30 is attached to the ceiling 2 by fixing the support plate portion 320 to the ceiling 2.

[0063] As shown in Figure 3, the support plate portion 320 has a projection 321 that protrudes from the outer edge of the housing portion 310 in a plan view. A screw 330 can be attached to the projection 321. Two sets of projection 321 and screw 330 are provided, and they are arranged point-symmetrically with the center of the socket portion 30 as the center of symmetry.

[0064] The screw 330 is an example of a mounting member used to attach the cap portion 20. The screw 330 is part of the socket portion 30, but is a different part from the support portion 311. The screw 330 is an example of a shaft member having a head portion 331 and a shaft portion 332 that has a shorter diameter than the head portion 331.

[0065] [Mounting structure] Next, we will explain the mounting structure of lighting fixture 1.

[0066] In lighting fixture 1, the light source unit 10 and the shade 20 are attached to the ceiling 2 via different components. Specifically, the light source unit 10 is attached to the ceiling 2 via a support part 311, while the shade 20 is attached to the ceiling 2 via screws 330. For example, the shade 20, the adapter 120 of the light source unit 10, and the unit body 110 are attached to the ceiling 2 in that order. The adapter 120 may be attached before the shade 20.

[0067] The shade 20 has a top surface 230 used for mounting to the ceiling 2. The top surface 230 is the part located between the light source unit 10 and the ceiling 2 when the shade 20 is mounted to the ceiling 2. Specifically, the top surface 230 is composed of the top surface 211 of the shade body 210 and the plate body 221 of the metal plate 220.

[0068] When attaching the cap 20 to the ceiling 2, first, the screws 330 of the socket 30 are inserted into the two through holes 227 provided in the metal plate 220. The through holes 227 are sized to allow the heads 331 of the screws 330 to be inserted. The screws 330 are temporarily fastened to the protruding parts 321 of the socket 30. Specifically, the heads 331 of the screws 330 and the protruding parts 321 are not in contact, and there is a gap between them that is larger than the thickness of the main body 221 of the metal plate 220.

[0069] After the head 331 of the screw 330 is passed through, with the shaft 332 positioned inside the through hole 227, the entire cap 20 is rotated to move the shaft 332 of the screw 330 from the through hole 227 to the slit 228. The width of the slit 228 is longer than the diameter of the shaft 332 of the screw 330, but shorter than the diameter of the head 331 of the screw 330. Therefore, when the shaft 332 of the screw 330 is positioned inside the slit 228, the cap 20 catches on the head 331, preventing the cap 20 from coming off. Subsequently, by tightening the screw 330, the plate body 221 of the cap 20 is sandwiched between the head 331 and the protruding part 321. This fixes the cap 20 to the ceiling 2 via the socket part 30.

[0070] At this time, the tightening force from the screw 330 is applied to the plate body 221 of the metal plate 220, so by forming the plate body 221 with a hard material such as metal, damage to the plate body 221 can be suppressed and reliability can be increased. Alternatively, a plate material made of resin material may be used instead of the metal plate 220. This plate material is made of a material that is harder than the inner circumference 212 of the cap body 210.

[0071] After the cap portion 20 is installed, the adapter 120 is attached to the socket portion 30. The cap portion 20 is provided with an opening 225, and the support portion 311 of the socket portion 30 is exposed to the opening 225. Therefore, the power supply terminal 121 of the adapter 120 can be easily attached to the support portion 311. Specifically, after inserting the power supply terminal 121 into the wide portion 311a of the support portion 311, the adapter 120 is rotated to hook the power supply terminal 121 into the narrow portion 311b. This fixes the adapter 120 to the socket portion 30.

[0072] After the adapter 120 has been installed, the unit body 110 is fixed to the adapter 120. Specifically, the unit body 110 is pushed upward towards the ceiling 2 so that the conductive pins 115 of the unit body 110 are inserted into the power supply recesses 122 of the adapter 120. This inserts the adapter 120 into the opening 111a of the fixture body 111 of the unit body 110, fixing the adapter 120 to the fixture body 111 and also establishing an electrical connection via the conductive pins 115.

[0073] [Effects, etc.] As described above, the lighting fixture 1 according to this embodiment comprises a light source unit 10 and a shade 20 that covers the light source unit 10. The light source unit 10 includes a power supply terminal 121, a fixture body 111, a light-emitting part 112 fixed to the fixture body 111, a power supply unit 113 that supplies power received via the power supply terminal 121 to the light-emitting part 112, and a translucent cover 114 that covers the light-emitting part 112. The light source unit 10 is detachably attached to a socket part 30 that is attached to the ceiling 2 via the power supply terminal 121. The shade 20 is attached to the ceiling 2 via a mounting member different from the power supply terminal 121.

[0074] As a result, the cap 20 is attached via a component different from the power supply terminal 121, so the power supply terminal 121 is not subjected to the load of the cap 20. Therefore, it becomes possible to attach a cap 20 that exceeds the weight limit that the power supply terminal 121 can support. For example, a cap 20 made of heavy material, or a large and heavy cap 20, can be attached. In this way, since the power supply terminal 121 is not used to attach the cap 20, the degree of freedom for the cap 20 can be increased. For example, the degree of freedom in selecting the size, weight, shape, and material of the cap 20 can be increased.

[0075] Furthermore, for example, the socket portion 30 has a support portion 311 that supports the light source unit 10 by inserting and fixing the power supply terminal 121 into it. The mounting member is part of the socket portion 30 and is a separate part from the support portion 311.

[0076] This eliminates the need to directly install mounting components on the ceiling 2, making installation of the lighting fixture 1 easier. In other words, by simply attaching the socket portion 30 to the ceiling 2, both the light source unit 10 and the shade portion 20 can be attached to the socket portion 30.

[0077] Furthermore, for example, the shade portion 20 has a top surface portion 230 that is located between the light source unit 10 and the ceiling 2 when it is attached to the ceiling 2. The top surface portion 230 is supported by a mounting member.

[0078] This allows the top surface 230, which contributes very little to light distribution, to be used for mounting, thereby minimizing the impact on light distribution.

[0079] Furthermore, for example, the top surface portion 230 is provided with a through hole 227 and a slit 228 extending from the through hole 227 and narrower in width than the through hole 227. The mounting member is a shaft member having a head portion 331 that is larger than the slit 228 and smaller than the through hole 227.

[0080] This allows for the attachment and detachment of the canopy 20 with a simple configuration.

[0081] For example, the mounting component is a screw 330.

[0082] This makes it easy to attach and detach the cap 20.

[0083] Furthermore, for example, the top surface portion 230 is provided with two sets of through holes 227 and slits 228.

[0084] This allows the cap section 20 to be supported in two places, thus stabilizing its posture.

[0085] Furthermore, for example, the two sets of through holes 227 and slits 228 are arranged point-symmetrically with respect to a predetermined point. The slits 228 extend along an arc centered at the predetermined point.

[0086] This allows the head 20 to be easily supported by the head 331 of the screw 330 by inserting the head 331 of the screw 330 into the through hole 227 and then rotating it along the slit 228.

[0087] Furthermore, for example, the top surface portion 230 includes a top surface portion 211 of the cap body 210 having an opening 215 larger than the socket portion 30, and a plate body 221 that is harder than the top surface portion 211 and has an opening 225 smaller than the opening 215. The mounting member (screw 330) is fixed to the plate body 221.

[0088] As a result, the main body of the plate 221 is harder than the top surface 211, making it resistant to tightening by the screws 330 and able to withstand the load of the cap 20, thereby suppressing damage to the cap 20.

[0089] Furthermore, for example, the top surface portion 211 is formed using resin, and the plate body 221 is formed using metal. Also, for example, the cap portion 20 has a cylindrical side wall portion 214 erected on the edge of the top surface portion 230. The side wall portion 214 is integrally formed using the same material as the top surface portion 211.

[0090] As a result, by forming the side wall portion 214 using resin, optical functions such as light diffusion function and light color conversion function can be imparted to the side wall portion 214.

[0091] For example, the light source unit 10 is a ceiling light.

[0092] As a result, even with the shade 20 removed, the light source unit 10 can function as a ceiling light on its own. In other words, the lighting fixture 1 can provide illumination regardless of whether the shade 20 is present or not.

[0093] In this embodiment, a so-called ear-type rosette was given as an example of the socket portion 30, but it is not limited to this. The socket portion 30 may also be realized by using a general hook ceiling fixture and a U-shaped light fitting together.

[0094] (modified version) Next, a modified example of the embodiment will be described. The modified lighting fixture differs from the lighting fixture of the embodiment in the shape of the metal plate of the shade. In the following description, the differences from the embodiment will be the main focus, and the explanation of the common points will be omitted or simplified.

[0095] Figure 5 is a perspective view of the metal plate 420 of the cap according to a modified example of the embodiment. Figure 6 is a perspective view showing an example of mounting the cap according to a modified example of the embodiment. Both Figures 5 and 6 show a perspective view of the metal plate 420 fixed to the ceiling 2, viewed from diagonally below.

[0096] As shown in Figures 5 and 6, the metal plate 420 has a flat portion 421 and stepped portions 422 and 423.

[0097] The flat plate portion 421 is the main body portion of the metal plate 420, and is a flat plate portion with a circular shape in plan view. An opening 425 is provided in the center of the flat plate portion 421. The opening 425 is an example of a second opening and is smaller than the opening 215 of the main body 210. The shape of the opening 425 is polygonal, but it may also be circular.

[0098] In this modified example, the flat plate portion 421 is smaller than the opening 215 of the cap body 210. That is, the flat plate portion 421 can pass through the opening 215 of the cap body 210. When the flat plate portion 421 is attached to the ceiling 2, it has a main surface that is close to the ceiling surface 3. "Close to" means "contact" or "sufficiently close". Specifically, "sufficiently close" means that the flat plate portion 421 is closer to the ceiling surface 3 than the part of the socket portion 30 or socket portion 530 (see Figure 7) that is furthest from the ceiling surface 3. For example, in the embodiment, the metal plate 220 and the ceiling surface 3 are not in contact, whereas in this modified example, the flat plate portion 421 of the metal plate 420 is in contact with the ceiling surface 3.

[0099] The stepped portion 422 is used to fix the metal plate 420 to the main body of the roof 210. The stepped portion 422 forms a step with respect to the flat plate portion 421 and does not come into contact with the ceiling surface 3. In this modified example, as shown in Figure 5, three stepped portions 422 are provided along the outer circumference of the flat plate portion 421. The stepped portions 422 are provided so as to protrude outward from the outer edge of the flat plate portion 421.

[0100] In a plan view, the stepped portion 422 overlaps the inner circumference 212 of the cap body 210. A screw hole 426 is provided in the stepped portion 422. A screw 240 is inserted through the screw hole 426 to fix the cap body 210 and the metal plate 420. In addition, four stepped portions 422 and four screw holes 426 may be provided so that fixing can be done in four places, as in the embodiment. Alternatively, two or five or more stepped portions 422 may be provided.

[0101] The stepped portion 423 is one of several portions used to fix the metal plate 420 to the ceiling 2. The stepped portion 423 forms a step with respect to the flat plate portion 421 and does not come into contact with the ceiling surface 3. In this modified example, as shown in Figure 5, two stepped portions 423 are provided along the inner circumference of the flat plate portion 421. The stepped portions 423 are provided so as to protrude inward from the inner circumference of the flat plate portion 421 (i.e., the edge of the opening 425).

[0102] As shown in Figure 6, in a plan view, the stepped portion 423 overlaps the protruding portion 321 of the socket portion 30. A screw hole 428 is provided in the stepped portion 423. The screw hole 428 is an example of a second through hole into which the shaft portion 332 of the screw 330 can be inserted and which is smaller than the head portion 331. By aligning the screw hole 428 with the protruding portion 321 of the socket portion 30 and tightening the screw 330, the metal plate 420 (cap portion) can be attached to the socket portion 30.

[0103] In this modified example, the flat plate portion 421 is provided with two sets of through holes 227 and slits 228. The through holes 227 and slits 228 are the same as in the embodiment and are used to fix the metal plate 420 (cap portion) to the ceiling 2. In other words, the metal plate 420 according to this modified example has multiple means for fixing to the ceiling 2. One of the multiple means is the screw holes 428, and another of the multiple means is the set of through holes 227 and slits 228. When fixing the metal plate 420 using the screw holes 428, the through holes 227 and slits 228 are not used, as shown in Figure 6.

[0104] In the following section, an example utilizing the through-hole 227 and slit 228 will be explained with reference to Figure 7. Figure 7 is a perspective view showing another example of mounting the cap according to a modified embodiment.

[0105] In the example shown in Figure 7, the screw 330 is directly fixed to the ceiling 2. After passing the head 331 of the screw 330 attached to the ceiling 2 through the through hole 227, the shaft portion 332 is moved to the slit 228 by sliding it, and the metal plate 420 can be directly fixed to the ceiling 2 by tightening the screw 330. In this case, the main surface (top surface) of the metal plate 420 and the ceiling surface 3 come into contact. In this way, when fixing the metal plate 420 using the through hole 227 and the slit 228, the screw hole 428 is not used, as shown in Figure 7.

[0106] In the example shown in Figure 7, a socket portion 530 without a protrusion 321 is used to support a light source unit 10 (not shown). The socket portion 530 is located inside the opening 425 of the metal plate 420 and does not come into contact with the metal plate 420.

[0107] In this modified example, a protrusion 429 is provided near the connection point between the through hole 227 and the slit 228. One protrusion 429 is provided on each side of the slit 228, sandwiching the slit 228. The protrusion 429 can restrict the movement of the head 331 of the screw 330. In other words, by the head 331 catching on the protrusion 429, the movement of the head 331 toward the through hole 227 is suppressed, and the cap is prevented from detaching from the screw 330. Note that the protrusion 429 may also be provided on the metal plate 420 according to the embodiment.

[0108] As described above, in the lighting fixture according to this modified example, the top surface includes a flat plate portion 421 having a main surface adjacent to the ceiling 2, and the through hole 227 and slit 228 are provided in the flat plate portion 421.

[0109] This allows the metal plate 420 to be directly fixed to the ceiling 2 using the through-hole 227 and slit 228. Since a socket portion 530 without a protruding portion 321 can be used to support the light source unit 10, the degree of freedom in selecting the socket portion can be increased.

[0110] Furthermore, for example, the top surface includes a stepped portion 423 that forms a step with respect to the flat plate portion 421 and does not come into contact with the ceiling 2. The stepped portion 423 is provided with a screw hole 428 that is smaller than the head portion 331 and into which the shaft portion 332 of the screw 330 can be inserted.

[0111] This allows the metal plate 420 to be fixed to the ceiling 2 using the screw holes 428. Similar to the embodiment, the socket portion 30 can be used.

[0112] Furthermore, in this modified example, the combination of through-holes 227 and slits 228 may not be provided. In other words, only screw holes 428 may be available as a means of attaching the cap to the ceiling 2.

[0113] (others) Although the lighting fixture according to the present invention has been described above based on the above embodiments, the present invention is not limited to the above embodiments.

[0114] For example, the above embodiment shows an example in which the cap portion 20 comprises two components, the cap body 210 and the metal plate 220, but it is not limited to this. The cap portion 20 may consist only of the cap body 210. In this case, the inner circumference portion 212 of the cap portion 20 is provided with through holes 227 and slits 228. To ensure strength, the inner circumference portion 212 may be formed using a metal material. In other words, the cap body 210 may be integrally formed using different materials for the inner circumference portion 212 and the side wall portion 214.

[0115] Furthermore, for example, the two sets of through holes 227 and slits 228 were used for mounting the cap portion 20 by rotational sliding, but are not limited to this. For example, the two slits 228 may each extend from the two through holes 227 in directions parallel to each other. This may allow mounting by sliding with parallel movement instead of rotational sliding.

[0116] Alternatively, for example, instead of the through holes 227 and slits 228, screw holes 428 may be provided in the plate body 221 or the flat plate portion 421. In other words, the cap portion may be fixed by screwing it in without sliding it.

[0117] Furthermore, for example, the mounting member used to attach the cap portion 20 may be a different member from the socket portion 30. For example, as shown in the modified example, the screw 330 may be directly provided on the ceiling surface 3 of the ceiling 2 so as to be fastened.

[0118] Furthermore, the mounting member does not have to be a screw 330. In other words, it is not necessary to clamp and tighten the top surface 230 of the cap 20 with the mounting member; the top surface 230 may simply be hooked onto the mounting member.

[0119] Furthermore, while an example has been shown in which the light source unit 10 has an adapter 120, the invention is not limited to this. For example, the conductive pins 115 of the unit body portion 110 of the light source unit 10 may be inserted into and supported by the support portion 311 of the socket portion 30. That is, the conductive pins 115 may function as power supply terminals.

[0120] The shapes and materials of each component of the lighting fixture 1 are not limited to the examples of the embodiments described above and can be adjusted as appropriate. For example, the plan view shape of the light source unit 10 is not limited to a circle, but may be a square, rectangle, or other polygon, or even an ellipse. Similarly, the plan view shape of the shade 20 may be a square, rectangle, or other polygon, or even an ellipse.

[0121] Furthermore, the present invention also includes forms obtained by applying various modifications to each embodiment that a person skilled in the art could conceive, as well as forms realized by arbitrarily combining the components and functions of each embodiment without departing from the spirit of the present invention. [Explanation of symbols]

[0122] 1 Lighting fixtures 2 Ceiling 10 light source units 20 Kasabe 30, 530 Socket section 111 Main body of the device 112 Light-emitting part 113 Power supply section 114 Cover 121 Power supply terminal 210 Main body of the umbrella 211 Top section (first plate section) 215 Opening (First opening) 220, 420 metal plate 221 Main body of the board (second board section) 225, 425 opening (second opening) 227 Through hole (first through hole) 228 slits 230 Top section 311 Support part 330 Screws (Mounting Components) 331 Head 421 Flat plate part 423 Step section 428 Screw hole (2nd through hole)

Claims

1. Light source unit, The light source unit is covered by a shade, The aforementioned light source unit is Power supply terminal and The main body of the device, A light-emitting part fixed to the main body of the aforementioned device, A power supply unit that supplies power received via the power supply terminal to the light-emitting unit, It has a translucent cover that covers the light-emitting part, The socket is directly attached to the ceiling and is detachably attached via the power supply terminal. The aforementioned cap is attached to the ceiling via a mounting member different from the power supply terminal. The socket portion has a support portion that supports the light source unit by inserting and fixing the power supply terminals into it. The mounting member is a part of the socket portion and is a different part from the support portion. Lighting fixtures.

2. The aforementioned shade has a top surface that is located between the light source unit and the ceiling when it is attached to the ceiling. The top surface portion is supported by the mounting member, The lighting fixture according to claim 1.

3. The top surface is provided with a first through-hole and a slit extending from the first through-hole and having a narrower width than the first through-hole. The mounting member is a shaft member having a head that is larger than the slit and smaller than the first through hole. The lighting fixture according to claim 2.

4. The aforementioned mounting member is a screw. The lighting fixture according to claim 3.

5. The top surface portion is provided with two sets of the first through-hole and the slit. The lighting fixture according to claim 3 or 4.

6. The two sets of the first through holes and the slits are arranged point-symmetrically with respect to a predetermined point. The slit extends along an arc centered at the predetermined point. The lighting fixture according to claim 5.

7. A light source unit, The light source unit is covered by a shade, The aforementioned light source unit is Power supply terminal and The main body of the device, A light-emitting part fixed to the main body of the aforementioned device, A power supply unit that supplies power received via the power supply terminal to the light-emitting unit, It has a translucent cover that covers the light-emitting part, The socket portion is mounted on the ceiling and is detachably attached via the power supply terminal. The aforementioned cap is attached to the ceiling via a mounting member different from the power supply terminal. The aforementioned shade has a top surface that is located between the light source unit and the ceiling when it is attached to the ceiling. The top surface portion is supported by the mounting member, The top surface is provided with a first through-hole and a slit extending from the first through-hole and having a narrower width than the first through-hole. The mounting member is a shaft member having a head that is larger than the slit and smaller than the first through hole. The top surface portion includes a flat plate portion having a main surface adjacent to the ceiling, The first through hole and the slit are provided in the flat plate portion. Lighting fixtures.

8. The top surface portion includes a stepped portion that forms a step with respect to the flat plate portion and does not come into contact with the ceiling. fruit, The stepped portion is provided with a second through-hole smaller than the head portion, into which the shaft portion of the mounting member can be inserted. The lighting fixture according to claim 7.

9. A light source unit, The light source unit is covered by a shade, The aforementioned light source unit is Power supply terminal and The main body of the device, A light-emitting part fixed to the main body of the aforementioned device, A power supply unit that supplies power received via the power supply terminal to the light-emitting unit, It has a translucent cover that covers the light-emitting part, The socket portion is mounted on the ceiling and is detachably attached via the power supply terminal. The aforementioned cap is attached to the ceiling via a mounting member different from the power supply terminal. The aforementioned shade has a top surface that is located between the light source unit and the ceiling when it is attached to the ceiling. The top surface portion is supported by the mounting member, The top portion is A flat plate portion having a main surface adjacent to the ceiling, It includes a stepped portion that forms a step relative to the flat portion and does not come into contact with the ceiling, The mounting member is a shaft member having a shaft portion and a head portion larger than the shaft portion. The stepped portion is provided with a second through-hole that is smaller than the head portion and into which the shaft portion can be inserted. Lighting fixtures.

10. The top portion is A first plate portion having a first opening larger than the socket portion, It includes a second plate portion having a second opening smaller than the first opening and being harder than the first plate portion, The mounting member is fixed to the second plate portion. A lighting fixture according to any one of claims 2 to 9.

11. The first plate portion is formed using resin, The aforementioned second plate portion is formed using metal. The lighting fixture according to claim 10.

12. The aforementioned cap portion has a cylindrical side wall portion erected on the edge of the top surface portion, The side wall portion is integrally formed using the same material as the first plate portion. A lighting fixture according to claim 10 or 11.

13. The aforementioned light source unit is a ceiling light. A lighting fixture according to any one of claims 1 to 12.

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