Lighting fixture

Abstract

To provide a lighting fixture that allows a light source part to be readily disposed in a desired position of a cover with a simple structure.SOLUTION: A lighting fixture includes: a light source part 10; and a cover 40 for covering the light source part 10, where the cover 40 includes: a shade part 41 for covering the light source part 10; and a positioning part 44 capable of disposing the light source part 10 in a predetermined position that does not abut on an inner surface of the shade part 41 in the shade part 41. The positioning part 44 is formed integrally with the shade part 41. The cover 40 is formed from a light permeable resin material.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to lighting fixture technology. [Background technology]

[0002] Conventionally, lighting fixtures with resin covers have been disclosed (see, for example, Patent Document 1). In conventional lighting fixtures, an LED light source is positioned at a desired position within the cover using a position adjuster attached to a support. In such a structure, a position adjuster must be provided separately from the cover, and the LED light source must be positioned appropriately by adjusting the position of the position adjuster, which can complicate installation work. Furthermore, when the position adjuster is provided separately from the cover, as in conventional lighting fixtures, the number of parts increases and the assembly process for the lighting fixture becomes more complex. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2009-123546 Summary of the Invention [Problem to be solved by the invention]

[0004] The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a lighting fixture with a simple structure that allows a light source unit to be easily disposed at a desired position on a cover. [Means for solving the problem]

[0005] The problem to be solved by the present invention is as described above, and the means for solving this problem will now be described.

[0006] That is, the lighting fixture disclosed in the present application is a lighting fixture including a light source unit and a cover that covers the light source unit, the cover has a shade portion that covers the light source portion and a positioning portion that can position the light source portion at a predetermined position in the shade portion, The positioning portion is formed integrally with the cap portion.

[0007] The lighting fixture disclosed in the present application can have the following configurations based on the above configuration. In the lighting fixture disclosed in the present application, the cover is preferably made of a light-transmitting resin material.

[0008] In the lighting fixture disclosed in the present application, a hanging member for hanging and holding the light source unit is provided, the cover has a through hole; It is preferable that the positioning portion positions the light source unit at a predetermined position on the shade portion when the hanging member is inserted into the through hole and the cover is brought close to the light source unit.

[0009] In the lighting fixture disclosed in the present application, the positioning portion is preferably formed in a cylindrical shape having an insertion portion through which the hanging member is inserted.

[0010] In the lighting fixture disclosed in the present application, it is preferable that the shade portion has a shape that expands in diameter downward when the light source portion is suspended, and that the lower end portion is open.

[0011] In the lighting fixture disclosed in the present application, it is preferable that the light source unit is disposed at a position where it does not come into contact with the shade portion. [Effects of the Invention]

[0012] The present invention has the following effects. That is, according to the present invention, the light source unit can be easily disposed at a desired position on the cover with a simple structure. [Brief explanation of the drawings]

[0013] [Figure 1]1 is a front partial cross-sectional view showing a lighting fixture according to an embodiment of the present invention. [Figure 2] FIG. 2 is an enlarged cross-sectional view showing a light source unit according to an embodiment of the present invention. [Figure 3] FIG. 2 is a cross-sectional view taken along line AA showing the flange and power supply unit. [Figure 4] FIG. [Figure 5] FIG. [Figure 6] 10A is a side cross-sectional view of the cover, and FIG. 10B is a partially cross-sectional plan view of the positioning portion. [Figure 7] 10A and 10B are diagrams showing a cover according to another embodiment, in which (A) is a side cross-sectional view of the cover, and (B) is a partially cross-sectional plan view of a positioning portion. DETAILED DESCRIPTION OF THE INVENTION

[0014] A lighting fixture 100, which is an example of a lighting fixture according to an embodiment of the present invention, will be described with reference to FIGS. 1 to 6. The lighting fixture 100 is a pendant-type lighting fixture provided with a hanging member that suspends and holds a light source unit 10. Note that the lighting fixture 100 according to the present invention is not limited to a pendant-type lighting fixture, but may also be a direct-mount lighting fixture that is directly attached to a ceiling C or the like, or a recessed lighting fixture that is recessed into a ceiling surface. In the following description, the up-down direction of the lighting fixture 100 will be described as the up-down direction when the lighting fixture 100 is installed on the ceiling C. A direction perpendicular to the up-down direction will be described as the radial direction. Furthermore, in the description of this embodiment, a state in which the lighting fixture 100 is viewed from above will be referred to as a plan view. A state in which the lighting fixture 100 is viewed from a direction perpendicular to the up-down direction will be referred to as a side view. A state in which the cross-sectional shape of the lighting fixture 100 is viewed will be referred to as a cross-sectional view.

[0015] As shown in FIG. 1, the lighting fixture 100 mainly comprises a light source unit 10, a power supply unit 20 that supplies power to a light source 11 (in this embodiment, a COB-type LED) of the light source unit 10, an electric wire 22 that connects the light source 11 and the power supply unit 20, a mounting plate 30 on which the power supply unit 20 is disposed and that is attached to the ceiling surface, and a cover 40 that surrounds the light source unit 10 and forms an outlet 42 for extracting light from the light source unit 10.

[0016] (Light source part) 1 and 2, the light source section 10 is a unit including a light source 11, and is a part that emits light toward the irradiation surface side of the lighting fixture 100. As shown in FIG. 2, the light source 11 of this embodiment is a COB type LED, and has a plurality of LED elements 12 on a substrate. The light source 11 is a COB (Chip on Board) type light emitting module in which LED (Light Emitting Diode) elements 12 are formed on a substrate. A reflector 13 is arranged around the light source 11. The reflector 13 in this embodiment is a socket for a COB type LED. The reflector 13 is a dish-shaped member with a central portion concave upward, and the light source 11 is arranged on the underside of the concave portion. In addition, a diffusion cover 14 is provided so as to cover the lower and lateral sides of the light source. The diffusion cover 14 is formed in a hemispherical shape with the light source unit 10 at its upper center. The diffusion cover 14 is formed, for example, from a white translucent resin.

[0017] A base 15, which is a heat sink, is provided on the back side of the surface of the light source unit 10 on which the LED elements 12 are arranged. The base 15 is configured in a cylindrical shape, and a connection unit 16 that electrically connects the electric wires extending from the light source 11 to the electric wires extending from the power supply unit 20, which will be described later, is housed inside the base 15. In this embodiment, the connection unit 16 is formed by crimping the connection terminal of the electric wire 22 of the power supply unit 20 and the connection terminal of the electric wire of the light source unit 10 with a closed-end connector. A metal fixing plate 17 is arranged on the top surface of the base 15, and is fixed with screws 18, which are fixing members.

[0018] A bushing 19 is attached to the center of the metal fixing plate 17. The bushing 19 is a cylindrical member that protrudes upward from the upper surface of the fixing plate 17, and has a flange 19a at its lower end. The upper surface of the flange 19a is fixed to the lower surface of the fixing plate 17, thereby fixing the bushing 19 to the light source unit 10. One end of an electric wire 22 is inserted into the cylindrical portion of the bushing 19, preventing the electric wire 22 from bending or flexing.

[0019] (Power supply part) The power supply unit 20 is a power supply device that supplies power to the light source 11 of the light source unit 10 to light up the LED elements 12. The power supply unit 20 is configured such that a power supply circuit board, on which multiple electronic components are mounted on a printed wiring board processed into a rectangular parallelepiped shape, is housed in a box-shaped power supply case 21.

[0020] The power supply unit 20 converts AC current supplied from an external commercial power supply into a predetermined DC current and supplies the converted current to the LED elements 12 of the light source 11. As shown in Fig. 3, the power supply unit 20 has a connector 24 for electrically connecting an external commercial power supply electric wire drawn from above the ceiling to an electric wire 22 connected to the power supply circuit board.

[0021] When the lighting fixture 100 is attached to the ceiling C, the power supply unit 20 is electrically connected to the external commercial power supply by connecting the connector 24 to an external commercial power supply wire drawn out from the ceiling. The power supply unit 20 and the light source 11 are electrically connected by an electric wire 22.

[0022] The electric wire 22 also functions as a connecting member that connects the power supply unit 20 and the light source unit 10. In other words, when the power supply unit 20 is attached to the mounting plate 30 and the mounting plate 30 is attached to the ceiling C, the electric wire 22 functions as a hanging member that suspends and holds the light source unit 10.

[0023] In this embodiment, the electric wire 22 is configured as the suspension member, but this is not limited to this. For example, a metal wire may be provided separately and used as the suspension member.

[0024] (mounting plate and flange) The mounting plate 30 is a plate-like member fixed to the ceiling C, and has the power supply unit 20 attached to it. The mounting plate 30 is provided with an adjustment unit 30a for adjusting the length of the electric wire 22. The adjustment unit 30a is provided in the center of the mounting plate 30 in a plan view, and is configured to be able to adjust the hanging length of the electric wire 22. A male screw is provided on the outer periphery of the adjustment unit 30a. In addition, the plate surface of the mounting plate 30 is provided with fastener holes 30b for inserting fasteners for fixing the mounting plate to the ceiling C. In this embodiment, two fastener holes 30b are provided.

[0025] The flange 31 is a cylindrical body that covers the mounting plate 30 to which the power supply unit 20 is attached, and in this embodiment, it is configured to have a shape with cylindrical sides and a bottom surface that bulges downward, as shown in Figures 1, 3, and 4. The flange 31 is made of resin. An electric wire insertion portion 32 is provided in the center of the flange 31. A female screw is provided on the inner periphery of the electric wire insertion portion 32. The female screw of the electric wire insertion portion 32 is formed so as to be engageable with the male screw of the adjustment portion 30a of the mounting plate 30.

[0026] An electric wire insertion portion 32 is provided in the center of the flange 31 so that the electric wire 22 can be inserted in the vertical direction. The electric wire insertion portion 32 provided in the flange 31 is a space for passing the electric wire 22 toward the light source unit 10 (light source 11), and in this embodiment, is formed as a hole in the center of the bottom plate of the flange 31, as shown in Fig. 4. With this configuration, when the flange 31 is attached to the ceiling C, the electric wire 22 hangs down directly below the flange 31.

[0027] (cover) 1, a cover 40 that forms a light outlet 42 is provided around the light source unit 10. The cover 40 has a shade portion 41 that covers the light source unit 10 when the light source unit 10 is suspended.

[0028] When the light source unit 10 is suspended, the shade portion 41 has a shape that widens in diameter downward and has an open lower end. In this embodiment, the shade portion 41 has a shape that widens in diameter from top to bottom, and for example, the shade portion 41 is formed in a frustum shape that is a trapezoid in side cross section as shown in Figures 1 and 6. Note that the shape is not limited to a frustum shape as long as it widens in diameter from top to bottom, and may be, for example, a bell shape or a hemispherical shape.

[0029] In this embodiment, the inner surface of the shade portion 41 is textured. This improves the design and makes it possible to adjust the amount of light passing through the shade portion 41. The shade portion 41 is textured on its entire surface, but this is not limitative and it may be textured only on the lower half, for example, where the amount of light irradiated from the light source unit 10 is greater.

[0030] The lower end of the shade portion 41 is opened so as not to hinder the diffusion of light, and an outlet 42 is formed. The outlet 42 is open, and light from the light source portion 10 is directly extracted from the outlet 42. Note that the configuration of the outlet 42 is not limited to this, and for example, the outlet 42 may be configured to have a light control member such as a diffusion lens provided therein.

[0031] 1 and 5, a through-hole 43 is provided in the top portion that forms the upper end of the cover 40. The through-hole 43 is a hole for inserting the electric wire 22, which is a hanging member. The through-hole 43 is provided in the radial center of the cover 40. As a result, when the electric wire 22 is inserted into the through-hole 43, the light source unit 10 is easily positioned at the radial center of the shade portion 41, making it easy to align the shade portion 41 and the light source unit 10. The cover 40 has the shade portion 41 that forms the side surface, and a positioning portion 44 that can position the light source unit 10 at a predetermined position in the shade portion 41.

[0032] Further, a positioning portion 44 is provided that extends vertically downward for a predetermined length from the top (upper surface of the frustum) of the cap portion 41. The positioning portion 44 is formed in a cylindrical shape having an insertion portion 44a that continues from the through-hole 43. Because the positioning portion 44 is formed in a cylindrical shape, the insertion portion 44a can guide the electric wire 22 while attaching it, improving workability.

[0033] The positioning portion 44 protrudes vertically downward from the top of the shade portion 41, and the lower end of the positioning portion 44 is located at a position where it abuts against the upper surface of the light source unit 10. The positioning portion 44 has a cylindrical shape, and its upper end surface is continuous with the lower surface of the top of the shade portion 41. In other words, the shade portion 41 and the positioning portion 44 are formed integrally.

[0034] The shade portion 41 and the positioning portion 44 are made of a light-transmitting resin material. Because the shade portion 41 is made of a light-transmitting resin material, light from the light source unit 10 passes through the shade portion 41 and is emitted to the outside. Furthermore, because the positioning portion 44 is also made of the same light-transmitting material as the shade portion 41, the shadow created by the positioning portion 44 when the light is turned on is less noticeable compared to when the positioning portion 44 is made of a light-blocking material such as a metal pipe. The cover 40 is formed, for example, by injection molding, in which a light-transmitting resin is filled into a mold and cooled to form a mold. This allows the shade portion 41 and the positioning portion 44 of the cover 40 to be formed integrally, thereby reducing the number of parts.

[0035] A plurality of ribs 45 are erected on the side surface of the positioning portion 44. In Figures 6(A) and 6(B), the ribs 45 extend parallel to the axial direction of the positioning portion 44, and in this embodiment, four ribs are formed around the side surface of the positioning portion 44. By providing the ribs 45, the strength of the positioning portion 44 is improved, and it is possible for the positioning portion 44 to abut against the light source unit 10 and bear the load when supporting the weight of the cover 40.

[0036] The ribs 45 are made of the same light-transmitting resin material as the positioning portions 44. This makes the shadows created by the ribs 45 when the lamp is turned on less noticeable than when the ribs 45 are made of a light-blocking metallic material.

[0037] (How to install lighting fixtures) Here, a method for attaching lighting fixture 100 to ceiling C will be described with reference to FIGS. First, the mounting plate 30 is attached to the ceiling C. Fixing is performed by inserting fixing tools into the fixing tool holes 30b of the mounting plate 30 and attaching the plate to the ceiling C. Next, the external commercial power cable pulled out from the back side of the ceiling C is connected to the connector 24, thereby connecting to the electric wire 22. Next, the hanging length of the electric wire 22 is adjusted using the adjustment part 30a. If the electric wire 22 extends beyond the required length, the excess electric wire 22 can be gathered, for example, by hanging it on a cord holder provided on the mounting plate 30, making it easier to store within the flange 31. The flange 31 is fixed to the mounting plate 30 by engaging the female thread on the inner surface of the electric wire insertion part 32 with the male thread on the outer surface of the adjustment part 30a. This causes the mounting plate 30 and the power supply part 20 to be covered by the flange 31. The electric wire 22 hangs downward from the electric wire insertion part 32.

[0038] The electric wire 22 also functions as a connecting member that connects the power supply unit 20 and the light source unit 10. The light source unit 10 is held by the electric wire 22. The portion of the electric wire 22 on the light source unit 10 side is inserted into a through-hole 43 that forms the upper end of the cover 40. Furthermore, the portion of the electric wire 22 on the light source unit 10 side is inserted into an insertion portion 44a of a positioning portion 44. An end of the electric wire 22 is electrically connected at a connection portion 16 that is connected to an end of an electric wire extending from a light source 11 of the light source unit 10.

[0039] 1 and 2, a portion of the bushing 19 of the light source unit 10 is inserted into the insertion portion 44a of the positioning portion 44. As a result, the outer surface of the inserted bushing 19 is guided by the inner surface of the insertion portion 44a, more reliably aligning the light source unit 10. The electric wire 22 is inserted into the insertion portion 44a, and the lower surface of the positioning portion 44 abuts against the upper surface of the fixing plate 17, thereby positioning the light source unit 10 relative to the shade portion 41. The positioning portion 44 is provided with a rib 45, which allows the positioning portion 44 to support the load of the shade portion 41. The positioning portion 44 is made of a light-transmitting resin, which allows some light to pass through, thereby reducing shadows that occur on the cover 40.

[0040] The light source unit 10 is positioned so that it does not come into contact with the shade portion 41 by abutting against the lower surface of the positioning portion 44. This prevents the light source unit 10 from being held near the upper end of the shade portion 41, thereby preventing a decrease in the amount of light at the outlet 42. Specifically, the diffusion cover 14 can be positioned so that the glare-cut angle, which is the angle between the lower surface of the diffusion cover 14 and the inner surface of the outlet 42, is 25° or greater. A gap is also provided between the inner surface of the shade portion 41 and the upper surface of the base 15 of the light source unit 10. This gap allows some of the light emitted from the light source 11 to reach upward, thereby reducing shadows that occur at the top of the shade portion 41. This gap also allows heat radiated from the base 15, which serves as a heat sink, to be released from the outlet 42 below. Specifically, heat generated by the light source unit 10 is transferred to the base 15. If the air in this gap is at a lower temperature than the base 15, the heat is transferred to the air in the gap. Since the bottom of the shade portion 41 is open, air convection occurs in the space inside the shade portion 41, and the heat dissipation performance of the lighting fixture 100 can be improved.

[0041] Furthermore, because the positioning portion 44 is formed integrally with the shed portion 41, the step of moving the positioning portion 44 relative to the shed portion 41 is omitted, thereby shortening the installation process. Furthermore, because positioning can be performed without fixing the positioning portion 44 to the shed portion 41, additional fixing work can be omitted, thereby shortening the installation process.

[0042] (Another embodiment) Furthermore, the positioning portion 44 is not limited to a cylindrical portion, and may be configured to include a support plate 44b and an insertion ring 44c, as shown in FIG. As shown in Figure 7, the positioning portion 44 has a support plate 44b that continues from the through-hole 43 and an insertion ring 44c that is provided at the lower end of the support plate 44b. As shown in Figure 7(A), the upper end of the support plate 44b is continuous with the underside of the top of the shade portion 41. In other words, the shade portion 41 and the positioning portion 44 are formed integrally. The cover 40 is made of a light-transmitting resin material. By making the positioning portion 44 from a light-transmitting material, the shadow created by the positioning portion 44 when the lamp is turned on is less noticeable than with a light-blocking metallic material.

[0043] The electric wire 22 is inserted through the insertion portion 44a, and the lower surface of the insertion ring 44c abuts against the upper surface of the fixing plate 17, thereby positioning the light source unit 10 relative to the shade portion 41. Furthermore, since the positioning portion 44 is made of a light-transmitting resin, it is possible to reduce the amount of shading by transmitting some light.

[0044] According to the lighting fixture 100 of this embodiment described above, in a lighting fixture comprising a light source unit 10 and a cover 40 covering the light source unit 10, the cover 40 has a shade portion 41 covering the light source unit 10 and a positioning portion 44 that can position the light source unit 10 at a predetermined position on the shade portion 41, which is a position that does not abut the inner surface of the shade portion 41, and the positioning portion 44 is formed integrally with the shade portion 41. With this configuration, the positioning portion 44 is formed integrally with the shade portion 41, eliminating the step of moving the positioning portion 44 relative to the shade portion 41. This shortens the installation process. Also, since positioning can be performed without fixing the positioning portion 44 to the shade portion 41, additional fixing work can be omitted. This shortens the installation process and allows the light source unit 10 to be easily positioned at a desired position on the cover 40 with a simple structure.

[0045] Moreover, the cover 40 is preferably made of a light-transmitting resin material. By configuring the cover 40 in this manner, the shading portion 41 and the positioning portion 44 are formed from a light-transmitting material, and therefore the shadow created by the positioning portion 44 when the cover is turned on is reduced compared to when the cover is formed from a light-blocking material, for example, made of metal.

[0046] In addition, it is preferable that an electric wire 22 is provided as a hanging member for suspending and holding the light source unit 10, the cover 40 has a through hole 43, and the positioning portion 44 is configured to insert the electric wire 22 into the through hole 43 and position the light source unit 10 at a predetermined position in the shade portion 41 when the cover 40 is brought close to the light source unit 10. This configuration ensures a gap between the inner surface of the shade portion 41 and the upper surface of the base 15 of the light source unit 10. This gap allows some of the light emitted from the light source 11 to reach upward, thereby mitigating the shadow that occurs at the top of the shade portion 41.

[0047] Moreover, the positioning portion 44 is preferably formed in a cylindrical shape having an insertion portion 44a through which the electric wire 22 is inserted. With this configuration, the wires 22 can be attached while being guided by the insertion portion 44a, improving workability.

[0048] Furthermore, it is preferable that the shade portion 41 has a shape that, when the light source portion 10 is suspended, expands in diameter as it goes downward, and that the outlet 42 at the lower end is open. With this configuration, the lower end of the cover 40 is open, and light from the light source unit 10 is directly extracted from the extraction port 42, thereby ensuring a sufficient amount of light.

[0049] In this embodiment, the lower end of the positioning portion 44 is configured to abut against the upper surface of the fixed plate 17, but this is not limited to this.For example, an engaging claw may be provided on the outer peripheral surface of the lower end of the positioning portion 44, and an engaged portion may be provided on the fixed plate 17, thereby suppressing relative movement between the positioning portion 44 and the fixed plate 17 in the vertical direction. Alternatively, a positioning protrusion may be provided on a portion of the outer peripheral surface of the lower end of the positioning portion 44, and a positioning groove may be provided in the fixing plate 17, thereby suppressing relative rotation of the fixing plate 17 with respect to the positioning portion 44. [Explanation of symbols]

[0050] 10 Light source section 11 Light source 12 LED elements 13 Reflector 14 Translucent Lens 15 Foundation 16 Power circuit 17 Fixed plate 18 Fixing member (screw) 19 Bush 20 Power supply section 21 Power Supply Case 22 Electric wire 24 connectors 30 Mounting plate 31 flange 32 Wire insertion part 40 Cover 41 Kasabe 42 Outlet 43 Through hole 44 Positioning part 45 Ribs 100 lighting fixtures

Claims

1. A lighting fixture comprising a light source unit and a cover that covers the light source unit, the cover has a shade portion that covers the light source portion and a positioning portion that can position the light source portion at a predetermined position in the shade portion, The positioning portion is formed integrally with the shade portion.

2. The cover is formed from a light-transmitting resin material.

10. The lighting fixture of claim 1.

3. a hanging member for hanging and holding the light source unit is provided; the cover has a through hole; the positioning portion positions the light source unit at a predetermined position in the shade portion when the hanging member is inserted into the through hole and the cover is brought close to the light source unit.

10. The lighting fixture of claim 1.

4. The positioning portion is formed in a cylindrical shape having an insertion portion through which the hanging member is inserted.

4. A lighting fixture according to claim 3.

5. The shade portion has a diameter that increases downward when the light source portion is suspended, and has an open lower end.

5. A lighting fixture according to claim 4.

6. The light source unit is disposed at a position where it does not come into contact with the shade unit. A lighting fixture according to any one of claims 1 to 4.

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