JP2012109057A - Lighting fixture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lighting fixture capable of suppressing deformation and hanging-down of a light guide plate.SOLUTION: The lighting fixture includes: a light guide plate 7 which has an opening 71 at the nearly central part and a light incident end face 72 at the outer peripheral part; a light-emitting element 61 which is arranged so that emission light may enter the light incident end face 72 of the light guide plate 7; and an installation part 5 which has an engaging port 51 opposed to a wiring fixture Cb installed on a fixture installation surface C, is formed in nearly cylindrical shape with a flange part 52 extending toward the outside on the front side, and is inserted from the front side at the opening 71 of the light guide plate 7 so that the flange part 52 may support the peripheral part of the opening 71.

Description

  Embodiments described herein relate generally to a lighting fixture that performs illumination using a light guide plate using a light emitting element such as an LED as a light source.

  Recently, along with the high output, high efficiency, and widespread use of LEDs, lighting fixtures that can be used indoors or outdoors using LEDs as light sources have been developed. This luminaire is obtained by mounting a plurality of LEDs on a substrate so as to obtain a predetermined amount of light. For example, the luminaire is used as a so-called direct-attach type base illumination that is directly attached to a ceiling surface or the like.

  However, the light emitted from the LED has high directivity and is likely to cause glare, and uneven brightness tends to occur. Therefore, in order to suppress glare and improve the uniformity of the light emitting surface, a new lighting fixture that performs illumination using a light guide plate has been developed.

  In the case of such a lighting fixture, for example, an adapter is electrically and mechanically connected to a hanging sealing body as a wiring fixture installed on a ceiling surface for a general house, and the lighting fixture is attached to the adapter via a mounting portion. In the type to which the main body can be attached, when attaching or removing the lighting fixture main body to the adapter, an opening corresponding to the attachment portion is formed in the substantially central portion of the light guide plate so that the adapter can be easily operated. The

JP 2009-21200 A JP 2009-283197 A

However, in the lighting fixture as described above, the portion of the light guide plate where the opening is formed tends to be weak in strength, and the light guide plate is deformed or droops around the portion where the opening is formed, so that the light The problem that irradiation efficiency falls occurs.
This invention is made | formed in view of the said subject, and it aims at providing the lighting fixture which can suppress a deformation | transformation and sagging of a light-guide plate.

  A lighting fixture according to an embodiment of the present invention has a light guide plate having an opening at a substantially central portion and a light incident end face on an outer peripheral portion, and disposed so that outgoing light is incident on the light incident end face of the light guide plate. Light emitting element.

  In addition, it has an engagement port facing the wiring device installed on the device mounting surface, and has a flange portion extending outward on the front surface side, and is formed in a substantially cylindrical shape, in the opening of the light guide plate Inserted from the front side, the collar includes a mounting portion that supports the peripheral edge of the opening.

  According to the embodiment of the present invention, it is possible to provide a lighting fixture that can suppress deformation and sagging of the light guide plate.

It is a perspective view which shows the lighting fixture which concerns on embodiment of this invention. It is a perspective view which decomposes | disassembles and shows the same lighting fixture. It is a perspective view which shows the same instrument main body seeing from the back side. FIG. 4 is a cross-sectional view taken along line XX in FIG. 3. It is an enlarged view which shows the A section in FIG. It is an enlarged view which shows the B section in FIG. It is a perspective view which shows the attachment part (adapter guide) of the instrument main body. It is sectional drawing which shows the attachment state to the ceiling surface of the lighting fixture.

  Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 to 8. In each figure, the wiring connection relationship by lead wires or the like is omitted. Moreover, the same code | symbol is attached | subjected to the same part in each figure, and the overlapping description is abbreviate | omitted.

  The lighting fixture of this embodiment is a form used by being attached to a hooking sealing body as a wiring fixture installed on the fixture mounting surface, and for example, indoor lighting is performed using a light guide plate.

  1 to 4, the lighting fixture is an adapter A (electrically and mechanically connected to a fixture body 1 and a hooking sealing body Cb as a wiring fixture installed on a ceiling surface C as a fixture mounting surface. 2 and FIG. 8 together) and an infrared remote control transmitter R. As shown in FIG. 1, the instrument body 1 is formed in a substantially square appearance, and the front side is a light irradiation surface and the back side is a mounting surface to the ceiling surface C.

  As representatively shown in FIG. 2, the fixture body 1 includes a lighting device 2, a support chassis 3, a center chassis 4, an adapter guide 5 as an attachment portion, a light source portion 6, a light guide plate 7, and an auxiliary device. A component unit 8, a main body frame 9, and a cover member 10 are provided. These components will be described sequentially.

  The lighting device 2 includes a box-shaped cover case formed of a metal material such as aluminum, a circuit board accommodated so as to be covered with the cover case, and a circuit component mounted on the board. It is designed to be connected to a commercial AC power source via A, and receives this AC power source to generate a DC output. Therefore, the lighting device 2 is electrically connected to the light source unit 6 described later, supplies the direct current output to the light emitting element 61, and controls the lighting of the light emitting element 61. The lighting device 2 is mounted on the back side of the support chassis 3 (see FIG. 3).

  The support chassis 3 is formed in a substantially square shape from a metal material such as aluminum, and has a square-shaped shallow dish-shaped concave portion 31. Each side of the concave portion 31 is bent and extended outwardly in a step shape. A mounting piece 32 is formed. The front surface side of the recess 31 is configured as a support surface that supports the light guide plate 7, and a rectangular opening 33 is formed in a substantially central portion.

  The center chassis 4 is formed in a substantially rectangular parallelepiped box shape from a metal material such as a cold-rolled steel plate. One end side (the lower side in the drawing) is opened, and each open side is horizontal toward the outside. A hook-shaped contact portion 41 extending in the direction is formed. A circular opening 42 is formed on the other end side (upper side in the drawing). Therefore, the center chassis 4 has a rectangular parallelepiped shape as a whole. The abutting portion 41 is a portion that abuts on the back side of the light guide plate 7 via the support chassis 4, and the opening 42 is a portion through which the adapter A is inserted. As shown in FIG. 5, the contact portion 41 of the center chassis 4 is arranged so as to be superposed on the periphery of the opening 33 in the support chassis 3 from above, and this is fixed by a fixing means. The contact portion 41 of the center chassis 4 has a function of reinforcing the light guide plate 7.

  As shown in FIG. 5 and FIG. 7, the adapter guide 5 as the attachment portion is formed in a substantially cylindrical shape with a rectangular parallelepiped shape having a low height as a whole, like the center chassis 4. A circular engagement port 51 is provided through which the adapter A is inserted and engaged, and a flange portion 52 extending outward is formed on the front surface side (the lower end side in the drawing) extending over the entire circumference. Yes. The adapter guide 5 is disposed and attached such that the outer peripheral surface thereof is in contact with the inner peripheral surface of the center chassis 4. The adapter guide 5 includes an attachment / detachment mechanism to which the cover member 10 is detachably attached.

  As shown in FIGS. 2, 4, and 6, the light source unit 6 includes a substrate 62 on which the light emitting element 61 is mounted and an attachment plate 63 as an attachment member to which the substrate 62 is attached.

  The substrate 62 is formed of a horizontally long rectangular and glass epoxy resin flat plate as an insulating material, and a wiring pattern formed of copper foil is applied on the surface side. Further, a resist layer is appropriately applied. Note that when the material of the substrate 62 is an insulating material, a ceramic material or a synthetic resin material can be applied. Furthermore, when it is made of metal, a metal base substrate in which an insulating layer is laminated on one surface of a base plate having good thermal conductivity such as aluminum and excellent heat dissipation may be applied.

  The light emitting element 61 is an LED, which is a surface mount type LED package. A number of LED packages are mounted and arranged in a straight line along the longitudinal direction of the substrate 62. The LED package is generally composed of an LED chip disposed in a main body formed of ceramics, and a translucent resin for molding such as an epoxy resin or a silicone resin that seals the LED chip. Yes.

  The LED chip is a blue LED chip that emits blue light. In the translucent resin, a phosphor is mixed, and in order to be able to emit white light, a yellow phosphor that emits yellow light that is complementary to blue light is used. Yes.

  In addition, LED may be made to mount an LED chip directly on the board | substrate 62, and you may make it mount a bullet-type LED, and a mounting system and a format are not exceptionally limited.

  The mounting plate 63 is made of a material having good heat conduction, such as aluminum or galvanized steel plate, and is horizontally long and has a substantially C-shaped side surface. A substrate 62 is attached to the inner side wall of the attachment plate 63 by screwing or the like so that the back side thereof is in close contact. Therefore, the light source unit 6 is unitized by attaching the substrate 62 to the mounting plate 63.

  In the present embodiment, as shown mainly in FIG. 2, two unitized light source sections 6 are used, and are arranged corresponding to two opposing sides of the light guide plate 7. Yes. The unitized light source unit 6 may be arranged so as to correspond to each side of the light guide plate 7 and can be appropriately selected according to the design.

  The light guide plate 7 is formed in a rectangular flat plate shape using a material having high transmittance such as acrylic resin, and a dot pattern made up of a large number of white reflective dots that diffuse light is formed on the entire back side by printing. And a reflection sheet is provided. A diffusion sheet is provided on the entire front side. Furthermore, a rectangular opening 71 is formed at a substantially central portion of the light guide plate 7 so as to correspond to the outer shape of the adapter guide 5 and to correspond to the adapter A. Further, each side of the rectangular shape that is the outer peripheral portion of the light guide plate 7, that is, the side end surface, functions as a light incident end surface 72 through which light emitted from the light emitting element 61 is incident and travels in the light guide plate 7. It has become.

  The auxiliary component unit 8 includes a unit substrate and a plurality of electrical auxiliary components mounted on the substrate in a horizontally long box-like case. The electrical auxiliary parts in this embodiment are an infrared remote control signal receiver, an illuminance sensor, a nightlight as an auxiliary light source, a switch, a monitor lamp, and the like.

  The auxiliary component unit 8 is disposed on the outer peripheral edge of the lighting fixture, that is, the fixture main body 1, specifically, on the outer peripheral edge of the main body frame 9. Accordingly, the light guide plate 7 is disposed outside the light emitting region. The auxiliary component unit 8 configured in this manner is provided with a plurality of electrical auxiliary components in a centralized manner, and is attached to the main body frame 9.

  The main body frame 9 is made of a synthetic resin such as ABS resin or polycarbonate, has a substantially square shape and is formed in a frame shape larger than the dimension of the light guide plate 7, and includes a side wall 91 and a lower end of the side wall 91. And a bottom wall 92 having an inclined portion extending obliquely downward from the portion toward the inside and rising obliquely toward the inside. A plurality of bosses 93 are erected on the bottom wall 92, and the attachment pieces 32 of the support chassis 3 are screwed to the bosses 93.

  As shown with reference to FIGS. 5, 8, and 9, the cover member 10 is formed from a synthetic resin material having translucency such as acrylic resin or polycarbonate so that the front side is convex. ing. In addition, a large number of irregularities that perform a diffusive function are formed on the front surface. The cover member 10 is attached to the adapter guide 5 and covers the engagement port 51 so as to be openable and closable so as to face the engagement port 51, and can be removed.

  Next, the assembly process of the instrument body 1 configured as described above will be described mainly with reference to FIGS. As described above, the center chassis 4 is arranged such that the contact portion 41 is superposed on the peripheral portion of the opening 33 in the support chassis 3 from above, and this is fixed by the fixing means. Then, the mounting plate 63 of the light source unit 6 is screwed to the support chassis 3, and the light guide plate 7 is disposed so that the light incident end face 72 faces the light emitting element 61.

Next, the adapter guide 5 is inserted from the front side in the opening 71 of the light guide plate 7, and further inserted so that the outer peripheral surface thereof is in contact with the inner peripheral surface of the center chassis 4, and the upper surface is screwed to the other end surface of the center chassis 4. Is done. In this state, the attachment pieces 32 of the support chassis 3 are screwed to the plurality of bosses 93 of the main body frame 9, and the cover member 10 is attached to the adapter guide 6.
Although the assembly of the instrument main body 1 is completed as described above, the order of the assembly is not particularly limited.

  In such an instrument main body 1, the contact portion 41 of the center chassis 4 is in contact with the back side of the light guide plate 8 through the support chassis 3 as shown in FIG. That is, the contact portion 41 of the center chassis 4 is disposed on and in contact with the periphery of the opening 71 on the back side of the light guide plate 7.

  Further, the peripheral edge portion on the front surface side of the opening 71 in the light guide plate 7 is supported and held by the flange portion 52 on the lower end side of the adapter guide 5. For this reason, it is possible to suppress deformation and sagging of the light guide plate 7 around the opening 71 of the light guide plate 7.

  Further, as representatively shown in FIG. 6, the outer peripheral edge portion on the front surface side of the light guide plate 7 is supported by the inclined portion of the bottom wall 92 in the main body frame 9. On the other hand, the support chassis 3 is disposed on the back side of the light guide plate 7. It arrange | positions so that it may be pinched | interposed by a part. In this state, the light incident end surface 72 of the light guide plate 7 is positioned to face the light emitting element 61 so that light emitted from the light emitting element 61 is incident thereon.

  Subsequently, as shown in FIGS. 2 and 8, the adapter A is electrically and mechanically connected to the hooking sealing body Cb installed on the ceiling surface C by the hooking blade provided on the upper surface side. A substantially cylindrical shape is formed, and a pair of locking portions A1 are provided on both sides of the peripheral wall so as to always protrude to the outer peripheral side by a built-in spring. The locking portion A1 is immersed by operating a lever provided on the lower surface side. Further, a power cord (not shown) connected to the lighting device 2 is led out from the adapter A, and is connected to the lighting device 2 via a connector.

  The infrared remote control transmitter R transmits, for example, a specific coded infrared remote control signal in the form of a pulse with a frequency of 38 kHz. For example, an all-light button, a dimming button, a nightlight button, an off button, etc. Is provided. By operating the remote control transmitter R toward the auxiliary component unit 8, that is, the infrared remote control signal receiving unit, the light emission state of the light emitting element 61 in the light source unit 6, that is, control of all-light lighting, dimming lighting, extinguishing, etc. It can be performed.

  Next, the attachment state to the ceiling surface C of the lighting fixture comprised as mentioned above is demonstrated with reference to FIG. In the figure, the illustration of the power cord led out from the adapter A is omitted.

  As shown in FIG. 10, a hanging ceiling body Cb is installed on the ceiling surface C. The adapter A is electrically and mechanically connected to the hooking sealing body Cb. From this state, the cover member 10 is opened or removed, and the engagement port 51 is opened, and the engagement port 51 of the adapter guide 5 in the instrument body 1 is aligned with the adapter A, as shown by the arrow in the figure. The instrument main body 1 is pushed up from below by hand until it is securely engaged with the engagement port 51 of the adapter guide 5, and the attachment port 51 is covered with the cover member 10 to be in a closed state.

  Thereby, in the attachment state of the instrument main body 1, the adapter A is inserted through the opening 42 of the center chassis 4, and the engagement portion A 1 of the adapter A is engaged with the engagement port 51 of the adapter guide 5 to maintain the attachment state. .

  Further, when removing the instrument main body 1, it can be removed by opening or removing the cover member 10 and operating the lever provided on the adapter A to release the engagement of the locking portion A 1 of the adapter A.

When power is supplied to the lighting device 2 in the mounting state of the lighting fixture, the light emitting elements 61 are energized through the substrate 62, and each light emitting element 61 is lit. The light emitted from the light emitting element 61 enters the light incident end surface 72 of the light guide plate 7, and this incident light is totally reflected within the light guide plate 7 and spreads over the entire light guide plate 7, and is formed on the back side. The light diffused and reflected by the dot pattern composed of the reflective dots and further diffused and homogenized by the diffusion sheet on the front side is emitted from the front side. Further, a part of the light leaking from the light guide plate 7 is reflected by the reflection sheet and radiated to the front side so as to be reused.
Moreover, since the cover member 10 has translucency, the light which leaked from the light-guide plate 7 can be permeate | transmitted, and a feeling of darkness can be suppressed.

  Further, the heat generated from each light emitting element 61 is conducted from the back side of the substrate 62 to the mounting plate 63, conducted to the support chassis 3, and effectively dissipated over a wide area of the support chassis 3.

  As described above, according to the present embodiment, since the peripheral portion of the opening 71 of the light guide plate 7 is supported from the front side by the flange portion 52 formed on the adapter guide 5 as the attachment portion, the deformation or sag of the light guide plate is prevented. The lighting fixture which can be suppressed effectively can be provided.

  In addition, this invention is not limited to the structure of the said embodiment, A various deformation | transformation is possible in the range which does not deviate from the summary of invention. For example, the collar part formed in the attachment part may not be formed over the entire circumference, and may be partially formed as long as the peripheral part of the opening of the light guide plate can be supported.

DESCRIPTION OF SYMBOLS 1 ... Instrument body, 2 ... Lighting device, 3 ... Support chassis,
4 ... Center chassis, 5 ... Mounting part (adapter guide), 6 ... Light source part,
7 ... light guide plate, 8 ... auxiliary component unit, 9 ... main body frame,
DESCRIPTION OF SYMBOLS 10 ... Cover member, 51 ... Engagement opening, 52 ... Gutter part, 61 ... Light emitting element,
62 ... substrate, 71 ... opening of light guide plate, 72 ... light incident end face,
A ... Adapter, C ... Appliance mounting surface (ceiling surface),
Cb ... Wiring device (hook ceiling body)

Claims (1)

A light guide plate having an opening at a substantially central portion and having a light incident end face at an outer peripheral portion;
A light emitting element disposed so that outgoing light is incident on the light incident end face of the light guide plate;
The front surface side of the opening of the light guide plate is formed in a substantially cylindrical shape having an engagement port facing the wiring device installed on the device mounting surface and having a flange portion extending outwardly on the front surface side. A mounting portion that is inserted through and the flange portion supports a peripheral portion of the opening;
The lighting fixture characterized by comprising.

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