Louvers and lighting devices

Abstract

This product provides a louver that improves assembly efficiency and maintains the shape of the blades. [Solution] The wing 41 has a pair of wing portions 63 formed in a substantially V-shape in cross-section with the lower end as the apex, and the ends of the wing portions 63 are attached to the side frame portion 36. The wing portion 63 has an upper hook portion 67 protruding from the end face of the wing portion 63, and a fitting portion 68 above the upper hook portion 67 that protrudes from the end face of the wing portion 63 more than the lower side of the upper hook portion 67. The side frame portion 36 of the louver frame 32 has an upper mounting hole 46 through which the upper hook portion 67 and the fitting portion 68 are inserted and attached. The upper mounting hole 46 has an inclined portion 49 that widens upward with its lower end as the top portion 48, a fitting groove portion 50 into which the fitting portion 68 is fitted on the upper side of the inclined portion 49, and an upper hook portion 51 between the inclined portion 49 and the fitting groove portion 50 into which the upper hook portion 67 catches when the fitting portion 68 is fitted into the fitting groove portion 50.

Description

Technical Field

[0001] Embodiments of the present invention relate to a louver and a lighting device.

Background Art

[0002] Conventionally, in a lighting device, in order to suppress the generation of glare, a louver may be disposed at an opening on the lower surface of the fixture body.

[0003] The louver has an end of a blade attached to a side frame portion of a louver frame, and the blade is disposed inside the louver frame. The blade is bent into a substantially V-shaped cross section that expands upward with the lower side as the apex. Such a louver requires improvement in the workability of assembling the end of the blade to the side frame portion of the louver frame and maintenance of the shape of the blade in order to maintain predetermined optical characteristics.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] The problem to be solved by the present invention is to provide a louver and a lighting device that improve the workability of assembly and can maintain the shape of the blade. <L

Means for Solving the Problems

[0006] The louver of the embodiment comprises a louver frame having a side frame and a fin. The fin has a pair of fin portions formed in a substantially V-shape in cross-section with the lower end as the apex, and the ends of the fin portions are attached to the side frame. The fin portion has an upper hook portion protruding from the end face of the fin portion and a fitting portion above the upper hook portion that protrudes from the end face of the fin portion more than the lower side of the upper hook portion. The side frame has an upper mounting hole through which the upper hook portion and the fitting portion are inserted and attached. The upper mounting hole has an inclined portion that widens upward with the lower end as the apex, a fitting groove portion above the inclined portion into which the fitting portion is fitted, and an upper hook portion between the inclined portion and the fitting groove portion into which the upper hook portion catches when the fitting portion is fitted into the fitting groove. [Effects of the Invention]

[0007] According to this embodiment, it is expected that the ease of assembly will be improved and the shape of the blades will be maintained. [Brief explanation of the drawing]

[0008] [Figure 1] This is a perspective view of a lighting device showing one embodiment. [Figure 2] This is a perspective view of the same lighting device with the louvers removed. [Figure 3] This is a cross-sectional view of the same lighting device. [Figure 4] This is a perspective view of the same louver. [Figure 5] This is a disassembled perspective view of the same louver. [Figure 6] This is a perspective view showing the assembly structure of the side frame and blades of the same louver. [Figure 7] This is a perspective view showing the assembly structure of the side frame and blades of the same louver. [Figure 8] This is a perspective view of the assembled state of the side frame and blades of the same louver. [Figure 9] This is a perspective view showing the assembly structure of the central frame and blades of the same louver. [Modes for carrying out the invention]

[0009] One embodiment will be described below with reference to the drawings.

[0010] Figures 1 to 3 show the lighting device 10. The lighting device 10 is a long, recessed ceiling lighting device that is installed embedded in the ceiling surface.

[0011] The lighting device 10 comprises a fixture body 11 with an open bottom, a reflector 12 disposed inside the fixture body 11, a light source 13 attached to the reflector 12, and a louver 14 positioned at the bottom opening of the fixture body 11.

[0012] The fixture body 11 is elongated and is installed embedded in a recessed hole provided in the ceiling surface. The fixture body 11 is box-shaped, having an elongated top plate portion 17, side plate portions 18 bent downward from both sides in the short direction intersecting the longitudinal direction of the top plate portion 17, and end plate portions 19 provided on both ends of the top plate portion 17 in the longitudinal direction, with an opening 20 formed on the bottom side. A decorative frame portion 21 is provided around the lower end of the fixture body 11, which covers the recessed hole and is positioned in contact with the ceiling surface when installed. Hooking holes 22 for attaching the louvers 14 are provided at two locations in the longitudinal direction on the lower end side of the side plate portions 18 on both sides.

[0013] Furthermore, the reflector 12 is elongated and positioned along its longitudinal direction on the upper side inside the fixture body 11. The reflector 12 has a roughly U-shaped mounting portion 25 whose cross-section in the short direction opens downward, and reflector plate portions 26 that inclinate to widen diagonally downward from the lower ends on both sides of the mounting portion 25 in the short direction. The upper surface of the mounting portion 25 is attached to the lower surface of the top plate portion 17 of the fixture body 11, and the tips of the reflector plate portions 26 on both sides are positioned on the inner surfaces of the side plate portions 18 on both sides.

[0014] Further, the light source 13 is long and is attached below the attachment portion 25 of the reflector 12 along the longitudinal direction of the fixture body 11. The light source 13 is constituted by a light source unit in which a light source module is disposed on the lower surface of a long chassis, and a cover 29 having translucency for covering the light source module is attached to the chassis. The light source module is constituted by mounting a plurality of light-emitting elements such as LEDs on a long substrate. The cover 29 is formed such that the cross-section in the short-side direction has a convexly curved shape on the lower surface side. Note that the light source 13 may be a straight tube-shaped LED lamp or the like.

[0015] A power supply unit (not shown) for supplying lighting power to the light source 13 and causing it to light is disposed within the attachment portion 25 of the reflector 12 or on the chassis of the light source 13.

[0016] Also, as shown in FIGS. 1 to 5, the louver 14 is long and is detachably disposed within the opening 20 of the fixture body 11. The louver 14 has a surrounding louver frame 32, a lattice-shaped louver body 33 disposed within the louver frame 32, a plurality of hanging brackets 34 attached to one side in the short-side direction of the louver frame 32, and a plurality of detaching mechanisms 35 attached to the other side in the short-side direction of the louver frame 32.

[0017] The louver frame 32 has side frame portions 36 which are long sides disposed along the longitudinal direction on both sides in the short-side direction, end face frame portions 37 which are short sides disposed along the short-side direction at both ends in the longitudinal direction, and connecting members 38 at the four corners for connecting between the ends of these side frame portions 36 and end face frame portions 37, and is formed in a substantially rectangular frame shape with the inside opened in the vertical direction. A fitting frame portion 39 which enters inside the opening 20 of the fixture body 11 is provided at the peripheral portion of the lower end of the louver frame 32.

[0018] The louver body 33 has a plurality of long central frames 40 and a plurality of blades 41 disposed in a crossed manner with respect to the central frames 40, and the plurality of central frames 40 and the plurality of blades 41 are combined in a lattice shape. Both ends of the central frame 40 are attached to the end face frame portion 37, both ends of the blade 41 are attached to the side frame portion 36, and the louver body 33 is disposed inside the louver frame 32.

[0019] Further, as shown in FIGS. 6 to 8, the side frame portion 36 of the louver frame 32 is formed by bending a metal plate. The side frame portion 36 has a side reflecting surface 43 and a fitting frame portion 39 provided at the lower end of the side reflecting surface 43. The side reflecting surface 43 has a lower side reflecting surface 43a disposed on the opening 20 side and an upper side reflecting surface 43b bent from the upper end of the lower side reflecting surface 43a. A plurality of connecting pieces 43c for connecting to the end face frame portion 37 project from both longitudinal ends of the lower side reflecting surface 43a.

[0020] As shown in FIG. 3, the lower side reflecting surface 43a is inclined at a predetermined angle (for example, 20°) with respect to the vertical direction (up and down direction) such that the upper end side is inclined downward toward the center side in the short side direction of the louver 14, and the upper side reflecting surface 43b is inclined at a predetermined inclination angle (for example, 70°) so as to be inclined downward from the upper end of the lower side reflecting surface 43a. The inclination angle of the upper side reflecting surface 43b is larger than that of the lower side reflecting surface 43a. The side reflecting surface 43 (the lower side reflecting surface 43a and the upper side reflecting surface 43b) is formed in a planar shape (flat plate shape). In a state where the louver frame 32 and the louver body 33 are assembled, the upper end side of the lower side reflecting surface 43a and the upper side reflecting surface 43b are disposed above the louver body 33 and face the upper surface side of the louver body 33.

[0021] As shown in FIGS. 6 to 8, the fitting frame portion 39 has a lower surface portion 44 that projects horizontally outward from the lower end of the side reflecting surface 43 and a standing portion 45 that is raised from the outer end of the lower surface portion 44.

[0022] The side reflecting surface 43 (the lower side reflecting surface 43a) is provided with an upper mounting hole 46 and a lower mounting hole 47 for attaching the end portion of the blade 41.

[0023] The upper mounting hole 46 has a pair of inclined portions 49 that widen upward with the lower end as the apex 48, a pair of fitting grooves 50 that widen further upward from above the pair of inclined portions 49, an upper hook portion 51 that is stepped upward between the inclined portions 49 and the fitting grooves 50, and a guide portion 52 that protrudes downward between the upper ends of the pair of fitting grooves 50. The guide portion 52 is formed in a roughly triangular shape with the center of the lower end as the apex, and both sides are inclined upward toward the upper end of the fitting grooves 50. The space between the pair of inclined portions 49 of the upper mounting hole 46 is provided in the shape of an inverted triangular hole (insertion hole) with the lower end as the apex 48.

[0024] The lower mounting hole 47 is located at a distance from the upper mounting hole 46, on the downward extension line from the top 48 of the inclined portion 49 of the upper mounting hole 46. The lower mounting hole 47 is a long slit in the vertical direction, and is formed in a roughly trapezoidal shape with its upper and lower ends facing each other horizontally and parallel, and both sides inclined to widen upward. The upper end of the lower mounting hole 47 is configured as the lower hook portion 53, and the lower end is configured as the locked portion 54.

[0025] As shown in Figure 5, the end frame portion 37 of the louver frame 32 is formed by bending a metal plate. The end frame portion 37 has an end reflective surface 55 and a fitting frame portion 39 provided at the lower end of the end reflective surface 55. The end reflective surface 55 has a lower end reflective surface 55a positioned on the opening 20 side and an upper end reflective surface 55b bent from the upper end of the lower end reflective surface 55a. The end reflective surface 55 (the lower end reflective surface 55a and the upper end reflective surface 55b) is provided in a planar (flat) shape. The fitting frame portion 39 of the end frame portion 37 is configured in the same way as the fitting frame portion 39 of the side frame portion 36.

[0026] Furthermore, as shown in Figure 9, the central frame 40 of the louver body 33 is formed by bending a metal plate. The height dimension of the central frame 40 is the same as the height dimension of the blades 41, and when the central frame 40 and the blades 41 are assembled, the height positions of the upper and lower surfaces are at approximately the same height.

[0027] The central frame 40 has a pair of central frame sections (central frame plate sections) 57 that are bent into a roughly V-shape in cross-section with the lower end as the apex. The central frame sections 57 are provided in a planar (flat plate) shape, and their outer surfaces are formed as reflective surfaces.

[0028] In the central frame portion 57, a central fitting groove 58 is formed, extending from the midpoint in the vertical direction of the central frame portion 57 to the upper end, at the assembly position with each blade 41. The central fitting groove 58 opens at the upper end of the central frame portion 57 and is formed in a roughly isosceles trapezoidal shape, with the opening width at the lower end being smaller than the opening width at the upper end. The central fitting groove 58 has a base portion 59 and a pair of inclined side portions 60 that incline upward from both ends of the base portion 59, and is formed in a shape that allows it to be fitted to the upper side of the blade 41 (the upper side of the blade fitting groove 64 of the blade portion 63).

[0029] At both ends of the central frame section 57 in the longitudinal direction, mounting pieces 61 are provided at two locations, upper and lower, for attachment to the end frame section 37.

[0030] The blades 41 of the louver body 33 are formed by bending a metal plate. The blades 41 have a pair of blade sections (blade plates) 63 that are bent into a roughly V-shape in cross-section with the lower end as the apex. The blade sections 63 are provided in a curved or flat (flat plate) shape with a recessed outer surface, and the outer surface is formed as a reflective surface.

[0031] The blade portion 63 has a blade fitting groove 64 formed at the assembly position with the multiple central frames 40, extending from the midpoint in the vertical direction of the blade portion 63 to its lower end. The blade fitting groove 64 opens at the lower end of the blade portion 63 and is formed in a roughly isosceles triangular shape, with the lower end as the apex and the opening width widening upwards. The blade fitting groove 64 has a pair of inclined edges 65 that incline to widen upwards from the lower end, and a projection 66 that protrudes downwards from between the upper ends of the pair of inclined edges 65, and is formed in a shape that can be fitted to the lower side of the central fitting groove 58 of the central frame 40.

[0032] The end faces of the blade portion 63 have an upper hook portion 67 protruding from the end face of the blade portion 63, a fitting portion 68 protruding from above the upper hook portion 67 on the end face of the blade portion 63, a lower hook portion 69 protruding from below the upper hook portion 67 on the end face of the blade portion 63, and a locking portion 70 protruding from below the lower hook portion 69 on the end face of the blade portion 63.

[0033] The upper hook portion 67 is provided in a hook shape that protrudes from the end face of the wing portion 63 and has its tip protruding downward, and an upper hook groove 71 that opens downward is formed between the tip and the end face of the wing portion 63.

[0034] The fitting portion 68 is provided extending from the upper hook portion 67 to the upper end of the wing portion 63. The fitting portion 68 protrudes beyond the end face position of the wing portion 63 at a position below the upper hook portion 67, and the amount of protrusion from the end face of the wing portion 63 at a position below the upper hook portion 67 is smaller than that of the upper hook portion 67. The fitting portion 68 may also be provided at a position separated above the upper hook portion 67.

[0035] The lower hook portion 69 is provided in a hook shape that protrudes from the end face of the wing portion 63 and has its tip protruding upward, and a lower hook groove 72 that opens upward is formed between the tip and the end face of the wing portion 63.

[0036] The locking portion 70 is provided with an upper side as an arc-shaped or inclined introduction surface, and the lower side as a locking surface 73 that is substantially perpendicular to the end face of the blade portion 63.

[0037] Next, we will explain how to assemble the central frame 40 and the blades 41 of the louver body 33.

[0038] The lower end of the blade 41 is inserted into the central fitting groove 58 of the pair of central frame sections 57 of the central frame 40. The upper ends of the pair of central frame sections 57 are pinched to narrow the distance between them against elasticity, and the lower ends of the central fitting grooves 58 of the pair of central frame sections 57 are inserted into the lower end openings of the blade fitting grooves 64 of the pair of blade sections 63 of the blade 41.

[0039] By inserting the lower ends of the central fitting grooves 58 of the pair of central frame parts 57 into the wing fitting grooves 64 of the pair of wing parts 63 while loosening the tabs on the upper ends of the pair of central frame parts 57, the protruding portions 66 of the wing fitting grooves 64 of the pair of wing parts 63 are inserted between the pair of central frame parts 57, and the assembly is completed so that the upper ends of the wing fitting grooves 64 on both sides of the protruding portion 66 and the bottom edge 59 of the central fitting groove 58 come into contact.

[0040] By releasing the tabs on the upper ends of the pair of central frame sections 57, the pair of central frame sections 57 expand elastically, and the wing fitting grooves 64 of the pair of wing sections 63 engage with the lower outer surfaces of the central fitting grooves 58 of the pair of central frame sections 57. Furthermore, the elasticity of the pair of wing sections 63 causes the upper outer surfaces of the wing fitting grooves 64 to engage with the central fitting grooves 58 of the central frame 40.

[0041] In this way, multiple central frames 40 and multiple blades 41 are assembled in an intersecting manner to form a lattice-shaped louver body 33.

[0042] Next, we will explain how to assemble the side frame portion 36 of the louver frame 32 and the blades 41.

[0043] As shown in Figure 6, the upper ends of the pair of blade portions 63 of the blade 41 are grasped, and the distance between the pair of blade portions 63 is narrowed against elasticity, while the end faces of the blade 41 are brought closer to the upper mounting holes 46 and 47 of the side frame portion 36, and the blade 41 is moved in the assembly direction a from the lower end to the upper end of the side frame portion 36.

[0044] As shown in Figure 7, by moving the blade 41 toward the upper mounting hole 46 and lower mounting hole 47 of the side frame 36 in the assembly direction a, the upper hook portion 67 of the pair of blade portions 63 is inserted between the pair of inclined portions 49 from the top portion 48 side of the upper mounting hole 46 of the side frame 36, and the lower hook portion 69 of the pair of blade portions 63 is inserted into the lower mounting hole 47 of the side frame 36. Furthermore, the fitting portion 68 of the pair of blade portions 63 is inserted below the guide portion 52 between the pair of fitting groove portions 50 of the upper mounting hole 46, and the upper side of the end faces of the pair of blade portions 63 are brought into contact with the side frame 36.

[0045] As the blade 41 is moved in the assembly direction a, the knobs on the upper ends of the pair of blade sections 63 are loosened, causing the pair of blade sections 63 to spread apart elastically. As shown in Figure 8, the pair of fitting sections 68 are guided by the guide section 52 of the upper mounting hole 46 and fit into the pair of fitting grooves 50 of the upper mounting hole 46. At the same time, the upper hooking section 51 enters the upper hooking groove 71 of the upper hooking section 67, and the upper hooking section 67 catches on the outer surface of the upper hooking section 51. The upper hooking section 67 catches on the upper hooking section 51, locking the pair of fitting sections 68 in place so that they remain fitted into the pair of fitting grooves 50, preventing them from moving in the direction opposite to the assembly direction a.

[0046] The locking portions 70 of the pair of blade sections 63 are inserted into the lower mounting holes 47, and the lower end faces of the blades 41 are brought into contact with the side frame section 36. The lower hooking portion 51 on the upper side of the lower mounting hole 47 enters the lower hooking groove 72 of the lower hooking portion 69, the lower hooking portion 69 catches on the outer surface of the lower hooking portion 53, and the locking surface 73 of the locking portion 70 engages with the locked portion 54 on the lower side of the lower mounting hole 47. The engagement of the locking portion 70 with the locked portion 54 locks the lower hooking portion 69 in a state of being hooked on the lower hooking portion 53, preventing movement in the direction opposite to the assembly direction a.

[0047] Furthermore, as shown in Figure 2, the hook fittings 34 for the louver 14 are arranged at two locations along the longitudinal direction of the fitting frame portion 39 of one side frame portion 36. As shown in Figure 3, the hook fittings 34 have hook-shaped ends that protrude from the side of the fitting frame portion 39 and can be detachably hooked into hook holes 22 provided in one side plate portion 18 of the fixture body 11. The hook fittings 34 can only be attached to and detached from the hook holes 22 when the louver 14 is in a vertical position with one side frame portion 36 facing upwards and the other side frame portion 36 facing downwards, and will not come off the hook holes 22 when the louver 14 is in a horizontal position attached to the fixture body 11.

[0048] Furthermore, as shown in Figure 2, the attachment / detachment mechanism 35 for the louvers 14 is provided at two locations along the longitudinal direction of the fitting frame portion 39 of the other side frame portion 36. As shown in Figure 3, the attachment / detachment mechanism 35 has a rotating operating shaft 76 positioned facing the lower surface of the fitting frame portion 39, and a locking lever 77 integrally provided on this rotating operating shaft 76. By rotating the rotating operating shaft 76, the locking lever 77, which rotates integrally with it, moves forward and backward from the side of the fitting frame portion 39 and is detachably hooked into a hooking hole 22 provided on the other side plate portion 18 of the fixture body 11.

[0049] In the lighting device 10, when the light source 13 is turned on, the light emitted downward from the light source 13 passes between the louver frame 32, the multiple central frames 40, and the multiple blades 41 of the louver 14 and illuminates the room below. The multiple central frames 40 set the shading angle in the short direction of the lighting device 10 to 30° to 35° to suppress the generation of glare, and the multiple blades 41 set the shading angle in the long direction of the lighting device 10 to 30° to 35° to suppress the generation of glare.

[0050] In the louver 14 of this embodiment, each pair of wing portions 63 of the wing 41 has an upper hook portion 67 protruding from the end face of the wing portion 63, and a fitting portion 68 above the upper hook portion 67 that protrudes from the end face of the wing portion 63 more than the lower side of the upper hook portion 67. The side frame portion 36 has an upper mounting hole 46 through which the upper hook portion 67 and the fitting portion 68 are inserted and attached. The upper mounting hole 46 has an inclined portion 49 that widens upward with its lower end as the top portion 48, and a fitting groove portion 5 above the inclined portion 49 into which the fitting portion 68 is fitted. Since the structure has an upper hooking portion 51 between the inclined portion 49 and the fitting groove portion 50, where the fitting portion 68 is fitted into the fitting groove portion 50 and the upper hooking portion 67 catches on it, the blades 41 can be attached to the side frame portion 36 simply by moving the blade 41 in the assembly direction a from bottom to top relative to the side frame portion 36 while the pair of blade portions 63 are narrowed against elasticity, inserting the upper hooking portion 67 and the fitting portion 68 into the upper mounting hole 46, and releasing the narrowing of the pair of blade portions 63, thereby improving the workability of assembly. Moreover, the fitting portion 68 of the pair of blade portions 63 fits into the fitting groove portion 50 of the upper mounting hole 46, which holds the pair of blade portions 63 and maintains the shape of the blade 41.

[0051] Each pair of blades 63 has a lower hook portion 69 that protrudes from below the upper hook portion 67 on the end face of each blade 63, and the side frame portion 36 has a lower mounting hole 47 on the downward extension line from the top 48 of the inclined portion 49 of the upper mounting hole 46, into which the lower hook portion 69 catches when the fitting portion 68 is fitted into the fitting groove portion 50. Thus, the assembled state of the blades 41 and the side frame portion 36 can be reliably maintained.

[0052] The blade portion 63 has a structure in which a locking portion 70 protrudes from below the lower hook portion 69 on the end face of the blade portion 63 and locks onto the lower edge of the lower mounting hole 47 when the lower hook portion 69 is hooked onto the lower mounting hole 47, thereby preventing the lower hook portion 69 from coming off the side frame portion 36.

[0053] While several embodiments of the present invention have been described, these embodiments are presented as examples only and are not intended to limit the scope of the invention. These novel embodiments can be carried out in a variety of other forms, and various omissions, substitutions, and modifications can be made without departing from the spirit of the invention. These embodiments and their variations are included in the scope and spirit of the invention, as well as in the claims of the invention and its equivalents. [Explanation of symbols]

[0054] 10 Lighting devices 11. Main body of the device 13 Light source 14 Louvers 20 openings 32 Louver frame 36 Side frame section 41 feathers 46 Upper mounting holes 47 Lower mounting holes 48 Top 49 Slope 50 Fitting groove 51 Upper hooking part 63. Wing section 67 Upper hook part 68 Fitting part 69 Lower hook part 70 Locking part

Claims

1. A louver frame having a side frame section; It has a pair of wing sections formed in a roughly V-shape in cross-section with the lower end as the apex, and the ends of the wing sections are attached to the side frame section; Equipped with, The blade portion has an upper hook portion protruding from the end face of the blade portion, and a fitting portion located above the upper hook portion and protruding from the end face of the blade portion more than the lower side of the upper hook portion. The side frame portion has an upper mounting hole through which the upper hook portion and the fitting portion are inserted and attached. The upper mounting hole has an inclined portion that widens upward with its lower end as the top, a fitting groove portion on the upper side of the inclined portion into which the fitting portion is fitted, and an upper hook portion between the inclined portion and the fitting groove portion into which the upper hook portion catches when the fitting portion is fitted into the fitting groove portion. A louver characterized by the following features.

2. The blade portion has a lower hook portion that protrudes from below the upper hook portion on the end face of the blade portion, The side frame portion has a lower mounting hole on the extension line from the top of the inclined portion of the upper mounting hole downwards, into which the lower hook portion engages when the fitting portion is fitted into the fitting groove. The louver according to feature 1.

3. The blade portion has a locking portion that protrudes from below the lower hook portion on the end face of the blade portion and is locked to the lower edge of the lower mounting hole in a state where the lower hook portion hooks into the lower mounting hole. The louver according to feature 2.

4. An instrument body having an opening; A light source arranged within the main body of the aforementioned fixture; A louver according to any one of claims 1 to 3, which is disposed in the opening of the fixture body; A lighting device characterized by having the following features.

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