TWI449865B - Illumination tool - Google Patents

Description

Lighting fixture

Embodiments of the present invention relate to a lighting fixture that uses a light-emitting element such as a light emitting diode (LED) as a light source and illuminates using a light guide plate.

In recent years, with the increase in output and efficiency of light-emitting diodes (hereinafter referred to as LEDs), a lighting fixture that can be expected to have a long life, which is used indoors or outdoors using an LED as a light source, has been developed. In the lighting fixture, a plurality of LEDs are mounted on a substrate to obtain a predetermined brightness, and for example, it is used as a so-called direct-mount type base lighting that is directly mounted on a ceiling surface or the like.

However, the light emitted from the LED has strong directivity and is liable to generate glare, and is also prone to bright spots. On the other hand, in order to suppress glare and improve the uniformity of the light-emitting surface, a new lighting fixture using a light guide plate for illumination has been developed (for example, Patent Documents 1 and 2).

Such a lighting fixture is, for example, a type in which an adapter is electrically and mechanically connected to a ceiling body, which is a wiring fixture provided on a ceiling surface for general housing, and is in the adapter. The luminaire main body is attached, and substantially the entire lower surface of the luminaire main body is covered by the light guide plate.

[Advanced technical literature]

[Patent Literature]

[Patent Document 1] Japanese Patent Laid-Open Publication No. 2009-21200

[Patent Document 2] Japanese Patent Laid-Open Publication No. 2009-283197

However, in the case of the lighting fixture, when the luminaire main body is attached to the adapter or detached from the adapter, it is necessary to remove the light guide plate to perform work due to the operation of the adapter or the like.

In such a lighting fixture using a light guide plate, it is necessary to arrange the light incident end surface with a light source such as an LED so that light emitted from a light source such as an LED enters the light incident end surface of the light guide plate, and thus the operation is accompanied by the operation. In this case, there is a problem that the configuration of the lighting fixture is complicated.

The present invention has been made in view of the above problems, and it is an object of the invention to provide an operation that can be performed without removing a light guide plate when the luminaire main body is attached to an adapter or when detached from an adapter, and has a simple configuration and can be made thinner. Lighting fixtures.

A lighting fixture according to an embodiment of the present invention includes an adapter that is electrically and mechanically connected to a wiring fixture provided on an appliance mounting surface, and an appliance body that is attached to the adapter. The luminaire includes a light-emitting element that is disposed opposite to the adapter and has an opening at a substantially central portion and a light-incident end surface of the outer peripheral portion, and is configured to emit light to the light-incident end surface of the light guide plate, and The light-emitting element performs a lighting device for lighting control.

According to an embodiment of the present invention, it is possible to provide an operation that can be performed without removing the light guide plate when the luminaire main body is attached to the adapter or detached from the adapter, and the illuminating is simple and thin. appliance.

The above and other objects, features and advantages of the present invention will become more <RTIgt;

The lighting fixture of the present embodiment is used by being attached to a ceiling body as a wiring fixture provided on the appliance mounting surface, and is used to illuminate the room, for example, using a light guide plate.

Hereinafter, a first embodiment of the present invention will be described with reference to Figs. 1 to 11 . In each of the drawings, the wiring connection relationship indicating a wire or the like may be omitted. In the drawings, the same portions are denoted by the same reference numerals, and the repeated description is omitted.

In FIGS. 1 to 4, the lighting fixture includes an appliance body 1 and an adapter 2 that is electrically and mechanically connected to a ceiling body Cb provided on a ceiling surface C as an appliance mounting surface. The luminaire main body 1 has an appearance of a substantially square shape as shown in FIG. 1 , and the front surface side is an irradiation surface of light, and the back surface side is a mounting surface mounted on the ceiling surface C.

As represented by FIG. 2, the appliance body 1 includes a lighting device 3, a support chassis 4, a center chassis 5, an adapter guide 6, a light source portion 7, a light guide plate 8, and a body frame. 9 and cover member 10. These components will be described in order.

The lighting device 3 is configured by accommodating a circuit board and circuit components mounted on the board in a box-shaped casing, and is connected to a commercial alternating current power source via the adapter 2, and receives the alternating current power source to generate a direct current output. Therefore, the lighting device 3 is electrically connected to a light source unit 7 to be described later, and supplies the DC output to the DC output. The light-emitting element 71 controls the light-emitting element 71 to be lighted. This lighting device 3 is located and mounted on the back side of the support chassis 4 (refer to FIG. 3).

The support chassis 4 is formed of a metal material such as aluminum into a substantially square shape, and has a square-shaped shallow disk-shaped recess 41, and a mounting piece 42 extending outward is formed on each side of the recess 41. Further, the front surface side of the recessed portion 41 is configured as a reflecting surface, and a four-sided opening 43 is formed in a substantially central portion. Therefore, the support chassis 4 has the function of a reflection plate.

As shown in FIG. 5, FIG. 7 and FIG. 8, the center chassis 5 is formed in a substantially rectangular parallelepiped shape by a metal material such as a cold-rolled steel sheet, and one end side (upper and lower sides in the drawing) is open, and A flange-shaped abutting portion 51 that extends in the horizontal direction to the outside is formed on each of the open sides. Further, a circular opening 52 is formed on the other end side (upper side and upper side in the drawing). Therefore, the center chassis 5 as a whole has a substantially cylindrical shape with a low height. The abutting portion 51 is a portion that abuts against the back side of the light guide plate 8, and the opening 52 is a portion through which the adapter 2 is inserted. Further, as shown in FIG. 5, the peripheral portion of the opening 43 supporting the chassis 4 is disposed so as to overlap the upper surface side of the abutting portion 51 of the center chassis 5, and they are fixed by welding or the like. Further, the abutting portion 51 of the center chassis 5 has a function of reinforcing the light guide plate 8 as described in detail below.

Further, on the other end side of the side wall of the center chassis 5, an outlet port 53 through which a power connector (not shown) connected to the lighting device 3 is led is formed into a substantially quadrangular shape.

As shown in FIG. 5, the adapter guide 6 is formed in a substantially octagonal column shape, and is provided with an engagement opening 61 through which the adapter 2 is inserted and engaged with the center portion, and a flange portion 62 that faces outward on the lower end side. The adapter guide 6 with The outer peripheral surface is disposed so as to be in contact with the inner peripheral surface of the center chassis 5. An opening corresponding to the outlet 53 of the center chassis 5 is provided on the adapter guide 6.

As shown in FIGS. 2, 4, 6, and 9 (a) and 9 (b), the light source unit 7 includes a substrate 72 on which the light-emitting element 71 is mounted, and a mounting board as a mounting member to which the substrate 72 is attached. 73 constitutes.

As shown in FIGS. 9( a ) and 9 ( b ), the substrate 72 is formed in a stepped shape by cutting both ends in a horizontally long rectangular shape, and is formed of a flat plate of a glass epoxy resin as an insulating material. The side is applied with a wiring pattern formed of a copper foil. Further, a wiring layer is appropriately laminated on the wiring pattern and applied with a resist layer. Further, in the case where the material of the substrate 72 is an insulating material, a ceramic material or a synthetic resin material can be used. In addition, when it is made of a metal, it is also possible to use a metal base substrate in which an insulating layer is laminated on one area of the base plate, which is excellent in thermal conductivity and excellent in heat dissipation.

The light-emitting element 71 is an LED and is a surface mount type LED package. The LED package is linearly arranged in a plurality along the longitudinal direction of the substrate 72, and specifically, 15 are mounted and disposed. The LED package is substantially made of an LED chip disposed in a cavity formed of ceramic or synthetic resin, and a translucent resin for molding a resin such as an epoxy resin or a silicone resin that seals the LED chip. And constitute.

The LED chip is an LED chip that emits blue light. A phosphor is mixed into the light-transmitting resin, and a yellow phosphor that emits yellow light having a complementary color relationship with blue light is used in order to emit white light.

In addition, the LED can also directly mount the LED chip on the substrate 72. Moreover, a bullet-type LED can also be installed, and the mounting manner or form is not particularly limited.

The mounting plate 73 is made of a material having good heat conductivity such as an aluminum-plated or galvanized steel sheet, and has a horizontally long shape and a side surface formed in a substantially C-shaped channel shape. On the inner side wall of the mounting plate 73, the two substrates 72 are mounted in the longitudinal direction so as to be in close contact with each other by screwing or the like. Therefore, the light source unit 7 is unitized by mounting two substrates 72 on one mounting plate 73.

In the present embodiment, as shown in FIG. 2, four unitized light source units 7 are used, and are disposed corresponding to the respective sides of the light guide plate 8.

As shown in FIG. 2, the light guide plate 8 is formed into a rectangular plate shape using a material having a high transmittance such as an acrylic resin, and a plurality of white reflections of diffused light are formed by printing on the back side. A dot pattern formed by dots. Further, a substantially octagonal opening 81 is formed in a substantially central portion of the light guide plate 8 so as to correspond to the outer shape of the adapter guide 6 and corresponding to the adapter 2. The substantially octagonal opening 81 is typically formed into a shape obtained by chamfering a corner of a quadrangle. Further, each side of the rectangular shape of the outer peripheral portion of the light guide plate 8, that is, the side end surface, functions to allow the light emitted from the light-emitting element 71 to enter and enter the light incident end surface 82 in the light guide plate 8.

Further, as the light guide plate 8, a light guide plate in which a reflection sheet is provided on the back side or a light guide plate in which a diffusion sheet is provided on the front surface side can be suitably used.

As shown in FIG. 2, the substrate 72 of the light source unit 7 is disposed on each side of the light guide plate 8. That is, the light incident end face 82 that is incident on the light guide plate 8 with light is In this manner, the plurality of light-emitting elements 71 are arranged in a line on the substrate 72. Further, in this case, the light-emitting element 71 is disposed on the extension line L of the side of the light guide plate 8 on which the outer shape of the opening 81 is formed. In other words, the light-emitting elements 71 are located on a line L that is orthogonal to the straight line in which the light-emitting elements 71 are arranged linearly on the substrate 72 and that is tangent to the outer shape of the opening 81 of the light guide plate 8.

The main body frame 9 is made of a synthetic resin such as an Acrylonitrile Butadiene Styrene (ABS) resin or a polycarbonate, and is formed in a substantially square shape and larger than the size of the light guide plate 8. The frame is larger and includes a side wall 91 and a bottom wall 92 having an inclined portion that extends inward from the lower end portion of the side wall 91 and that rises obliquely. Further, a plurality of bosses 93 are erected on the bottom wall 92, and the mounting pieces 42 for supporting the chassis 4 are screwed to the hubs 93.

The cover member 10 is formed in a substantially square shape by a milky white synthetic resin material such as acrylic resin or polycarbonate, and is detachably attached to the adapter guide 6 by an engagement and disengagement mechanism (not shown). Therefore, by mounting the cover member 10, the adapter 2 can be covered without being easily viewed from below.

As shown in FIG. 2 and FIG. 10, the adapter 2 is electrically and mechanically connected to the ceiling body Cb provided on the ceiling surface C by a suspension blade provided on the upper surface side, and has a substantially cylindrical shape, and two of the peripheral walls. On the side, the pair of locking portions 21 are provided so as to protrude toward the outer peripheral side by the built-in spring. The locking portion 21 is retracted by operating a lever provided on the lower surface side. Further, the power supply line 22 to be connected to the lighting device 3 is led out from the adapter 2, and is connected to the lighting device 3 via the power supply connector 23.

Next, the assembly procedure of the fixture body 1 constructed as described above will be mainly described with reference to Figs. 4 to 6 . As described above, the center chassis 5 is disposed such that the peripheral portion of the opening 43 of the support chassis 4 is superposed on the upper surface side of the abutting portion 51 of the center chassis 5, and the portion is joined by welding or the like. The support chassis 4 is fixed together. Further, the attachment plate 73 of the light source unit 7 is screwed to the support chassis 4, and the light guide plate 8 is disposed such that the light incident end surface 82 faces the light-emitting element 71.

Then, the adapter guide 6 is inserted through the opening 81 of the light guide plate 8 and its outer peripheral surface is in contact with the inner peripheral surface of the center chassis 5, and the upper surface is screwed to the other end surface of the center chassis 5. In this state, the attachment piece 42 supporting the chassis 4 is screwed to the plurality of hubs 93 of the body frame 9, and the cover member 10 is attached to the adapter guide 6.

The assembly of the luminaire main body 1 is completed as described above, but the order of the assembly is not particularly limited.

As shown in FIG. 5, the device body 1 is such that the abutting portion 51 of the center chassis 5 abuts against the back side of the light guide plate 8. More specifically, the abutting portion 51 of the center chassis 5 is disposed and abuts on the back side of the light guide plate 8, that is, around the opening 81. Further, the contact of the abutting portion 51 of the center chassis 5 with respect to the back side of the light guide plate 8 may be performed directly or indirectly.

In the present embodiment, the peripheral portion of the opening 43 of the support chassis 4 is disposed so as to overlap the upper surface side of the contact portion 51 of the center chassis 5, and conversely, the center may be The contact portion 51 of the chassis 5 is placed so as to overlap the upper surface side of the peripheral portion of the opening 43 of the chassis 4 . In this case, the abutment portion of the center chassis 5 51 indirectly abuts against the back side of the light guide plate 8. That is, the contact of the abutting portion 51 of the center chassis 5 with respect to the back side of the light guide plate 8 can be directly or indirectly performed.

Further, as shown in FIG. 5, the peripheral edge portion on the front surface side of the opening 81 of the light guide plate 8 is supported by the flange portion 62 on the lower end side of the adapter guide 6. In addition, as shown in FIG. 6, the outer peripheral edge part of the front surface side of the light-guide plate 8 is supported by the inclined part of the bottom wall 92 of the main-body frame 9. On the other hand, a support chassis 4 is disposed on the back side of the light guide plate 8, and the light guide plate 8 is inclined by the flange portion 62 supporting the chassis 4 and the adapter guide 6, and the bottom wall 92 of the body frame 9. The shape is clamped and configured. In this state, the light incident end surface 82 of the light guide plate 8 is located at a position facing the light emitting element 71, and light emitted from the light emitting element 71 is incident.

Further, as shown in FIGS. 3, 4, and 6, a gap G is formed between the side wall 91 of the main body frame 9 and the attachment piece 42 of the support chassis 4. That is, the outer shape of the support chassis 4 is smaller than the frame-shaped main body frame 9, and a gap G is formed throughout the entire circumference of the support chassis 4. Through this gap G, the heat generated by the light-emitting element 71 is dissipated via the mounting plate 73 and under convection. Further, in order to promote the convection action, an air flow hole may be formed in the bottom wall 92 of the main body frame 9.

Next, the mounting state of the ceiling surface C of the lighting fixture configured as described above will be described with reference to Figs. 10 and 11 .

As shown in FIG. 10, the ceiling body Cb is provided in the ceiling surface C. Further, the ceiling body Cb electrically and mechanically connects the adapter 2. From this state, as shown by the arrow in the figure, while the adapter 2 is aligned with the engagement opening 61 of the adapter guide 6 of the luminaire main body 1, the shank body 1 is pushed up from below by the hand. The mounting operation is performed until the locking portion 21 of the adapter 2 is surely engaged with the engagement opening 61 of the adapter guide 6.

As shown in FIG. 11, in the mounted state of the appliance body 1, the adapter 2 is inserted into the opening 52 of the center chassis 5, and the locking portion 21 of the adapter 2 is locked to the engagement opening 61 of the adapter guide 6, and is disposed at the support bottom. The sponge-made packing P on the back side of the rack 4 is elastically deformed so as to be interposed between the back side of the support chassis 4 and the ceiling surface C in a compressed state.

Therefore, the luminaire main body 1 is firmly engaged with the adapter 2 without swaying, thereby stably maintaining the mounted state. The electrical connection is performed by connecting the power connector 23 of the adapter 2 to the power connector 23 connected to the lighting device 3 via the adapter guide 6 and the opening 53 of the center chassis 5 and the like.

Further, when the appliance body 1 is to be detached, after the electrical connection is released, the cover member 10 is removed, the lever provided on the adapter 2 is operated, and the locking portion of the adapter 2 is released. When the 21 is engaged, the appliance body 1 can be removed.

In the luminaire main body 1, the opening 81 is formed in the light guide plate 8, and does not become a configuration that covers substantially the entire lower surface of the luminaire main body 1 including the engagement opening 61 of the adapter guide 6. Therefore, when the attachment and detachment operation of the luminaire main body 1 is performed, in order to operate the adapter 2 or the like, it is not necessary to detach the light guide plate 8 from the luminaire main body 1 to perform work. Further, the adapter guide 6 is inserted through the opening 81 of the light guide plate 8, so that the thickness of the fixture body 1 can be reduced.

Moreover, in the mounting operation of the appliance body 1, when using the hand from below When the instrument body 1 is pushed up, stress is applied by pushing up the light guide plate 8 by hand, and the light guide plate 8 may be deformed. In particular, as shown in the present embodiment, in the case where the adapter 2 is operated, the opening 81 is formed in the light guide plate 8 in a manner corresponding to the adapter 2, and there is strength as compared with the light guide plate in which the opening 81 is not formed. The tendency to weaken.

However, in the present embodiment, the center chassis 5 is formed with an abutting portion 51 that faces the back surface side of the light guide plate 8, and the abutting portion 51 abuts against the back surface side of the light guide plate 8, thereby realizing enhancement of the light guide plate 8. The function is such that deformation of the light guide plate 8 can be suppressed. Further, since the abutting portion 51 is disposed around the opening 81 of the light guide plate 8, deformation of the light guide plate 8 can be effectively suppressed.

Further, since the abutting portion 51 of the center chassis 5 is rejoined and brought into contact with the periphery of the opening 43 of the support chassis 4 that supports the back side of the light guide plate 8, it also has a function of reinforcing the support chassis 4. Therefore, it is possible to surely suppress the deformation of the support chassis 4 and further suppress the deformation of the light guide plate 8. Further, the center chassis 5 functions as a box shape to support the ribs of the chassis 4, thereby enhancing the reinforcing effect and effectively reinforcing the flat supporting chassis 4.

When electric power is supplied to the lighting device 3 in the mounted state of the lighting fixture, the light-emitting element 71 is energized via the substrate 72, and each of the light-emitting elements 71 is turned on. The light emitted from the light-emitting element 71 is incident toward the light incident end surface 82 of the light guide plate 8, and the incident light is totally reflected in the light guide plate 8 and diffused throughout the light guide plate 8, and passes through a point formed by a reflection point formed on the back side. The light that is diffused and reflected and homogenized by the pattern is radiated from the front surface side. Moreover, a part of the light leaking from the light guide plate 8 is reflected by the reflecting surface of the support chassis 4. It is then radiated to the front surface side for reuse.

Further, the heat generated by each of the light-emitting elements 71 is conducted from the back surface side of the substrate 72 to the mounting board 73, and is radiated by the convection force promoted by the gap G between the main body frame 9 and the support chassis 4. Further, the heat that has been conducted to the mounting plate 73 is conducted to the support chassis 4, and heat is efficiently dissipated in a large area of the support chassis 4.

As described above, according to the present embodiment, it is possible to provide a lighting fixture in which the opening 81 is formed in the light guide plate 8 corresponding to the adapter 2, so that the fixture body 1 is attached to the adapter 2 or is detached from the adapter 2 In this case, the operation can be performed without removing the light guide plate 8, and the configuration is simple and the thickness can be reduced.

Moreover, it is possible to provide a lighting fixture capable of reinforcing the light guide plate 8 to suppress deformation.

Then, the inventors studied the uniformity of the brightness associated with the shape of the opening 81 of the light guide plate 8. The uniformity of the luminance will be described with reference to FIG. FIG. 12 is a plan view schematically showing a state of light emitted from the light-emitting element 71 of the light guide plate 8.

First, in Fig. 12, a quadrangular opening 81 is formed in the central portion of the rectangular light guide plate 8. Further, the light-emitting elements 71 mounted on the substrate 72 are disposed opposite to each other on the light incident end surface 82 of the light guide plate 8 (only one light-emitting element 71 is shown in the description).

In this case, it is understood that the light emitted from the light-emitting element 71 is advanced toward the opening 81 (indicated by a broken line in the drawing) and is radiated from the front surface side, but the vicinity of the corner portion of the light-emitting element 71 side of the opening 81 is dark as shown in the drawing. D. Therefore, there is a problem that the uniformity of the entire light guide plate 8 is lowered.

This phenomenon is considered to be caused by the fact that the light Lc in the vicinity of the corner portion of the opening 81 is interposed by the opening 81 (air layer) due to the corner portion, and the light Lc is refracted to hinder the advancement in the light guide plate 8. Light is thus produced and the light is reflected.

Therefore, various changes are made to the shape of the opening 81 of the light guide plate 8 and the state of light is observed. First, the corner portion of the square is chamfered, that is, the corner portion of the quadrilateral is chamfered, and the shape of the opening 81 of the light guide plate 8 is a substantially octagonal opening 81 as in the above-described embodiment.

In this case, it can be confirmed that the light emitted from the light-emitting element 71 is advanced toward the opening 81, and generation of the dark portion can be suppressed. This is considered to be because the shape of the opening 81 (air layer) caused by the corner portion can be reduced by the shape obtained by chamfering the opening 81.

Then, the shape of the opening 81 of the light guide plate 8 is set to a circular shape. In this case as well, it is confirmed that the light emitted from the light-emitting element 71 advances toward the circular opening 81 and the occurrence of the dark portion can be suppressed. This is considered to be because the opening 81 has a circular shape, so that there is almost no intervention of the opening 81 (air layer) caused by the corner portion.

As a result of the above investigation, it has been confirmed that the shape of the opening 81 of the light guide plate 8 is a shape or a circular shape in which the corner portion of the square is chamfered, thereby suppressing the occurrence of the dark portion and reducing the decrease in uniformity. Further, the shape of the opening 81 is a circular shape, and is not limited to a perfect circular shape, and a rounded shape or the like is also allowed.

Then, a dark portion generated near the opening 81 of the light guide plate 8 is performed. Perform verification of suppression. First, the light-emitting element 71 is disposed on a line on the light guide plate 8 that is orthogonal to the straight line in which the light-emitting elements 71 are arranged linearly on the substrate 72 and is tangent to the outer shape of the opening 81 of the light guide plate 8. An opening 81 is formed in which a corner portion of the quadrangle is chamfered. Further, the light-emitting element 71 is disposed on an extension line of the side on which the outer shape of the opening 81 of the light guide plate 8 is formed.

Therefore, the light emitted from the light-emitting element 71 advances mainly along the side of the outer shape, so that the portion where the dark portion is easily generated as described above is brightened, and the generation of the dark portion can be effectively suppressed.

On the other hand, when the light-emitting element 71 is disposed on the extension line of the side on which the outer shape of the circular opening 81 of the light guide plate 8 is formed, the portion where the dark portion is easily generated is brightened, and the occurrence of the dark portion can be effectively suppressed.

In still another aspect, the light-emitting element 71 is disposed on a tangent line of the circular opening 81 of the light guide plate 8 that is orthogonal to the straight line in which the light-emitting elements 71 are arranged linearly on the substrate 72.

In this case, the light emitted from the light-emitting element 71 also proceeds mainly in the tangential direction, so that the portion where the dark portion is easily generated is brightened, and the generation of the dark portion can be effectively suppressed.

Further, four unitized light source units 7 may be used, and the substrate 72 on which the light-emitting elements 71 are mounted may be disposed corresponding to each side of the light guide plate 8, or two light source units 7 may be used to guide the substrate 72 and the guide unit. The adjacent sides of the light plate 8 are disposed corresponding to each other. Further, the substrate 72 may be disposed corresponding to both opposite sides of the light guide plate 8, and the substrate 72 may be disposed only corresponding to one side of the light guide plate 8.

Further, the shape or form of the light guide plate 8, the center chassis 5, and the like are not limited to the above embodiment. For example, the light-emitting element 71 can use a solid-state light-emitting element such as an LED or an organic electroluminescence (EL). Further, the number of the light-emitting elements 71 is not particularly limited.

Next, a second embodiment of the present invention will be described with reference to Figs. 13 to 25 . The first embodiment is in communication with the basic configuration of the second embodiment, but the configuration of the details is slightly different. The second embodiment discloses a more specific configuration than the first embodiment.

In each of the drawings, the wiring connection relationship indicating a wire or the like may be omitted. In addition, the same or equivalent portions as those of the first embodiment are denoted by the same reference numerals, and the repeated description is omitted or simplified.

In FIGS. 13 to 18, the lighting fixture includes an luminaire 1 that is electrically and mechanically connected to a ceiling body Cb as a wiring device provided on a ceiling surface C as an appliance mounting surface (refer to FIG. 14 together). And Figure 21), and the infrared remote control transmitter R. The luminaire main body 1 has an appearance of a substantially square shape as shown in FIG. 1 , and the front surface side is an irradiation surface of light, and the back surface side is a mounting surface mounted on the ceiling surface C.

As represented by FIG. 2, the fixture body 1 includes a lighting device 3, a support chassis 4, a center chassis 5, an adapter guide 6, a light source portion 7, a light guide plate 8, a body frame 9, and a cover member 10. Furthermore, an auxiliary part unit S is provided which is provided with a plurality of electrical auxiliary parts.

As described further with reference to FIGS. 19 and 22, the lighting device 3 is covered with a metal outer casing member 31 made of a thermally conductive aluminum or the like, including a circuit board 32 mounted and housed in the outer casing member 31, and mounted. In the Circuit component 33 of circuit substrate 32. The outer casing member 31 is formed in a thin box shape having a substantially rectangular parallelepiped shape, and a flange-like connecting portion 31a extending outward along the side is formed on one long side and one short side. Further, a mounting tongue 31b is formed to extend on the long side opposite to the long side.

The circuit board 32 is made of an insulating material such as glass epoxy resin, and is formed in a substantially rectangular plate shape, and a circuit component 33 such as a control IC, a capacitor, a winding component, and a resistor element is mounted on the surface side. Further, a power connector 33a connected to the power source side (the adapter 2 side), a load connection connector 33b for connecting the light source unit 7, or a harness 33c for connecting the auxiliary component unit S are provided. Further, a component having a relatively small height dimension such as a switching element or a surface mounting component is attached to the back surface side of the circuit board 32.

As shown in FIG. 19, the circuit board 32 is attached to the outer casing member 31 by a resin fixture 32a with the front side as the lower side. The resin fixture 32a is disposed such that the front end thereof protrudes from the back surface side toward the front surface side of the outer casing member 31, and the resin fixture 32a is press-fitted into the mounting hole formed in the circuit board 32. As shown in FIG. 15, FIG. 16, and FIG. 18, the outer casing member 31 is formed larger than the circuit board 32, and in the mounted state of the circuit board 32, the circuit board 32 is disposed away from the flange-like connecting portion 31a side. .

The lighting device 3 described above electrically connects the adapter 2 side to the power connector 33a as described later, and is connected to the commercial AC power supply via the adapter 2. Therefore, the lighting device 3 receives the AC power supply to generate a DC output, and supplies the DC output to the light source unit via the wire from the load connection connector 33b. 7, the lighting element 71 is turned on. The lighting device 3 is located and mounted on the back side of the support chassis 4.

The support chassis 4 also serves as a heat dissipation member and functions as a heat dissipation member. The support chassis 4 is formed of a metal material such as aluminum having thermal conductivity so as to have a substantially square shape having a relatively large area, and the back side has a square-shaped shallow disk-shaped recess 41, and the sides of the recess 41 are formed outward. The mounting piece 42 extends in a stepped shape. Further, the front surface side of the recessed portion 41 is configured as a support surface for supporting the light guide plate 8, and a four-sided opening 43 is formed in a substantially central portion.

The center chassis 5 is integrally coupled to the support chassis 4 to constitute a chassis body. The center chassis 5 is formed of a metal material such as a cold-rolled steel sheet into a substantially rectangular parallelepiped box shape, and one end side (upper and lower sides in the drawing) is open, and a convex portion extending outward in the horizontal direction is formed on each of the open sides. Abutting portion 51 of a rim shape. Further, the other end side (upper side and upper side in the drawing) is formed with a circular opening 52.

The abutting portion 51 is a portion that abuts against the back surface side of the light guide plate 8 via the support chassis 4, and the opening 52 is a portion through which the adapter 2 is inserted. Further, as shown in FIG. 19, the abutting portion 51 of the center chassis 5 is disposed so as to overlap the peripheral portion of the opening 43 of the support chassis 4 from above, and they are fixed by a fixing mechanism. Therefore, the abutting portion 51 of the center chassis 5 has a function of reinforcing the light guide plate 8.

Further, on the other end side of the side wall of the center chassis 5, an outlet port 53 through which the power connector 33a connected to the lighting device 3 is led is formed into a substantially quadrangular shape.

As shown in FIG. 19, the adapter guide 6 is formed in a rectangular parallelepiped shape having a low height as in the center chassis 5, and is provided with an engagement opening 61 through which the adapter 2 is inserted and engaged with the center portion, and a lower end side is provided. The flange portion 62 faces outward. The adapter guide 6 is disposed such that its outer peripheral surface is in contact with the inner peripheral surface of the center chassis 5. Further, on the side wall of the adapter guide 6, a discharge port 63 is formed corresponding to the outlet port 53 of the center chassis 5. Further, the adapter guide 6 includes a loading and unloading mechanism that detachably mounts the cover member 10.

The light source unit 7 has the same configuration as that of the first embodiment, and as shown in FIGS. 14 and 18 to 20 , the substrate 72 to which the light-emitting element 71 is mounted and the mounting plate 73 as the mounting member to which the substrate 72 is attached are used. Composition.

In the present embodiment, as shown mainly in FIG. 14, two unitized light source units 7 are used, and are disposed corresponding to the opposite sides of the light guide plate 8. Further, the unit light source unit 7 is disposed so as to correspond to each side of the light guide plate 8, and can be appropriately selected according to the design.

The light guide plate 8 is formed into a flat plate shape having a rectangular shape using a material having a high transmittance such as an acrylic resin, and a dot pattern composed of a plurality of white reflection points of diffused light is formed by printing on the entire surface on the back surface side. Reflecting sheet. Further, a diffusion sheet is provided on the entire surface on the front surface side. Further, a substantially rectangular opening 81 is formed in a substantially central portion of the light guide plate 8 so as to correspond to the outer shape of the adapter guide 6 and corresponding to the adapter 2. Further, each side of the rectangular shape of the outer peripheral portion of the light guide plate 8, that is, the side end surface, functions to allow the light emitted from the light-emitting element 71 to enter and enter the light incident end surface 82 in the light guide plate 8.

The auxiliary component unit S includes a unit substrate and a plurality of electrical auxiliary components mounted on the substrate in a horizontally long box-shaped casing. The electric auxiliary component in the present embodiment is an infrared remote control signal receiving unit, a constant light or a channel setting switch.

The auxiliary component unit S is disposed in the lighting fixture, that is, the outer peripheral edge portion of the fixture body 1, and is specifically disposed on the outer peripheral edge portion of the main body frame 9. Therefore, it is disposed outside the light-emitting region of the light guide plate 8. The auxiliary part unit S configured in this way is provided by centralizing a plurality of electric auxiliary parts, and is mounted on the main body frame 9.

The main body frame 9 is made of a synthetic resin such as ABS resin or polycarbonate, and is formed in a substantially square shape and larger in frame shape than the size of the light guide plate 8, and includes a side wall 91 and a bottom wall 92 as shown in FIG. The bottom wall 92 has an inclined portion that extends obliquely downward from the lower end portion of the side wall 91 and that is inclined further inward. Further, a plurality of hubs 93 are erected on the bottom wall 92, and the mounting pieces 42 for supporting the chassis 4 are screwed to the hubs 93.

A cover member 10 is mounted on the adapter guide 6. As shown in FIG. 18 and FIG. 21, the cover member 10 is formed in a substantially square shape so that the translucent synthetic resin material such as acrylic resin or polycarbonate protrudes from the front surface side. Further, a plurality of irregularities having a diffusing function are formed on the surface on the front surface side. The cover member 10 covers the engagement opening 61 so as to be openable and closable with respect to the engagement opening 61, and is detachable.

Further, as shown in FIGS. 14 and 21, the adapter 2 is electrically and mechanically connected to the ceiling surface by a suspension blade provided on the upper surface side. The ceiling body Cb of C has a substantially cylindrical shape, and the pair of locking portions 21 are provided on both sides of the peripheral wall so as to protrude toward the outer peripheral side by the built-in spring. The locking portion 21 is retracted by operating a lever provided on the lower surface side.

Further, the power cord 22 to be connected to the lighting device 3 is led out from the adapter 2, and the power connector 23 is connected to the front end portion thereof. The power connector 23 is connected to a power connector 33a that is connected to the lighting device 3. The power connector 23 on the adapter 2 side is in the form of a socket, and the power connector 33a on the lighting device 3 side is in the form of a socket.

The connection configuration of the power connector 23 on the adapter 2 side and the power connector 33a on the lighting device 3 side will be mainly described with reference to Figs. 23 to 25 .

First, as shown in FIG. 23, the adapter guide 6 is disposed on the inner side of the center chassis 5 such that the outer peripheral surface of the adapter guide 6 is in contact with the inner peripheral surface of the center chassis 5. In a state where the center chassis 5 is combined with the adapter guide 6, as shown in FIG. 24, the opening 52 of the center chassis 5 corresponds to the engagement opening 61 of the adapter guide 6, and the outlet 53 of the center chassis 5 is The outlet 63 of the adapter guide 6 corresponds.

Therefore, the adapter 2 can be engaged with the engagement opening 61, and the power connector 33a on the lighting device 3 side can be led out from the outlets 53, 63.

More specifically, as shown in FIG. 25, the power connector 33a connected from the circuit board 32 of the lighting device 3 by the power supply line is directed from the outlets 53 and 63 to the inside of the center chassis 5 and the adapter guide 6. Export. Further, a power connector 23 on the adapter 2 side of the engagement opening 61 through which the adapter guide 6 is inserted is connected to the power connector 33a.

The infrared remote control transmitter R transmits, for example, a pulse-like specifically coded infrared remote control signal having a frequency of 38 kHz, for example, a full light lighting button, a dimming lighting button, a constant light button or a light extinguishing button. By operating the remote control transmitter R toward the auxiliary component unit S, that is, the infrared remote control signal receiving unit, the light-emitting state of the light-emitting element 71 of the light source unit 7, that is, the full-light lighting, the dimming lighting, and the like, can be performed. Control of the light, etc.

As shown in FIG. 18 to FIG. 20, the illuminating device configured as described above is provided so that the support chassis 4 that functions as a heat dissipating member is disposed on the back side of the light guide plate 8, and is screwed and attached to the main body frame 9. On the hub 93. In this state, the attachment piece 42 of the support chassis 4 is in surface contact with the upper surface of the attachment plate 73 of the light source unit 7, and is thermally coupled. Therefore, the attachment piece 42 serves as a thermal coupling portion between the light source portion 7 and the support chassis 4.

Further, the peripheral edge portion on the front surface side of the opening 81 of the light guide plate 8 is supported by the flange portion 62 on the lower end side of the adapter guide 6. As shown in FIG. 20, the outer peripheral edge portion on the front surface side of the light guide plate 8 is supported by the inclined portion of the bottom wall 92 of the main body frame 9. On the other hand, as described above, a support chassis 4 is disposed on the back side of the light guide plate 8, and the light guide plate 8 is supported by the chassis 4 and the flange portion 62 of the adapter guide 6 and the bottom of the body frame 9. The inclined portion of the wall 92 is disposed so as to be sandwiched. In this state, the light incident end surface 82 of the light guide plate 8 is located at a position facing the light-emitting element 71, and light emitted from the light-emitting element 71 is incident.

Next, the mounting state of the ceiling device C of the lighting fixture configured as described above will be described with reference to FIG. 21.

The ceiling body Cb is provided on the ceiling surface C. Moreover, the ceiling body Cb is electrically and mechanically connected to the adapter 2. In this state, the power connector 23 on the adapter 2 side is connected to the power connector 33a on the lighting device 3 side.

Then, while the adapter 2 is aligned with the engagement opening 61 of the adapter guide 6 of the instrument body 1, the device body 1 is pushed up from below by the hand until the locking portion 21 of the adapter 2 is surely engaged with the card of the adapter guide 6. The mounting operation is performed by the opening 61.

In the mounted state of the fixture body 1, the adapter 2 is inserted into the opening 52 of the center chassis 5, and the locking portion 21 of the adapter 2 is locked to the engagement opening 61 of the adapter guide 6, and is disposed on the back side of the support chassis 4. The sponge pad P is elastically deformed so as to be interposed between the back side of the support chassis 4 and the ceiling surface C in a compressed state. Therefore, the luminaire main body 1 is firmly engaged with the adapter 2 without swaying, thereby stably maintaining the mounted state.

In the mounting operation of the apparatus body 1, when the apparatus body 1 is pushed up from below by the hand, the light guide plate 8 is pushed up by the hand to apply stress, and the light guide plate 8 may be deformed.

However, the center chassis 5 is formed with an abutting portion 51 that faces the back surface side of the light guide plate 8, and the abutting portion 51 abuts against the back side of the light guide plate 8, thereby realizing the function of reinforcing the light guide plate 8, thereby suppressing The deformation of the light guide plate 8.

Further, in the present embodiment, the abutting portion 51 of the center chassis 5 is re-engaged against the periphery of the opening 43 of the support chassis 4 that supports the back side of the light guide plate 8, and thus has the reinforcing support chassis 4. Features. Therefore, it is possible to surely suppress the deformation of the support chassis 4 and further suppress the change of the light guide plate 8. shape. Further, the center chassis 5 is formed in a box shape to have a high reinforcing effect, and can effectively reinforce the flat supporting chassis 4.

Thus, the center chassis 5 has a function of enhancing the function of the light guide plate 8 and deriving the power connector 33a by the outlet port 53.

As described above, according to the present embodiment, it is possible to provide a lighting fixture in which the opening 81 is formed in the light guide plate 8 corresponding to the adapter 2, so that the appliance body 1 is attached to the adapter 2 or is detached from the adapter 2 In this case, the work can be performed without removing the light guide plate 8, and the thickness can be reduced. Moreover, the effect of suppressing the deformation of the light guide plate 8 can be achieved.

The present invention is not limited to the configurations of the respective embodiments described above, and various modifications can be made without departing from the spirit and scope of the invention. Further, the respective embodiments are presented as an example, but are not intended to limit the scope of the invention.

In each of the above embodiments, the case where the light guide plate formed into a rectangular shape is used and the light-emitting surface is formed into a substantially rectangular shape has been described. However, for example, the light guide plate may be formed in a hexagonal shape or an octagonal shape. The light-emitting elements are arranged corresponding to the respective sides, and the body frame is formed into a circular shape, and a circular light-emitting surface is formed such that the light-emitting surface of the light guide plate is exposed in a circular shape.

1‧‧‧ Appliance body

2‧‧‧Adapter

3‧‧‧Lighting device

4‧‧‧Supporting chassis

5‧‧‧Center chassis

6‧‧‧ Adapter guide

7‧‧‧Light source department

8‧‧‧Light guide plate

9‧‧‧ body frame

10‧‧‧Caps

21‧‧‧Cards

22‧‧‧Power cord

23‧‧‧Power connector

31‧‧‧ Shell components

31a‧‧‧Flange-like joint

31b‧‧‧Installation tongue

32‧‧‧ circuit board

32a‧‧‧Resin fixing fixture

33‧‧‧ circuit parts

33a‧‧‧Power connector

33b‧‧‧Connector for load connection

33c‧‧‧ wiring harness

41‧‧‧ recess

42‧‧‧Installation

43‧‧‧ (supporting the chassis) opening

51‧‧‧Apartment

52‧‧‧ (opening of the center chassis)

53‧‧‧ (central chassis) outlet

61‧‧‧Clock mouth

62‧‧‧ (lower side) flange

63‧‧‧ (exporter guide) outlet

71‧‧‧Lighting elements

72‧‧‧Substrate

73‧‧‧Installation components (mounting plate)

81‧‧‧ (light guide) opening

82‧‧‧Light incident end face

91‧‧‧ side wall

92‧‧‧ bottom wall

93‧‧·wheels

C‧‧‧ appliance mounting surface (ceiling surface)

Cb‧‧‧Wiring device (ceiling body)

D‧‧‧Dark Department

G‧‧‧ gap

Lc‧‧‧Light

P‧‧‧ cushion

R‧‧‧Infrared remote control transmitter

S‧‧‧Auxiliary parts unit

Fig. 1 is a perspective view showing a lighting fixture according to a first embodiment of the present invention.

Fig. 2 is a perspective view showing the lighting fixture in an exploded manner.

Fig. 3 is a perspective view showing the main body of the device as viewed from the back side.

Fig. 4 is a cross-sectional view taken along line X-X of Fig. 3.

Fig. 5 is an enlarged view showing a portion A in Fig. 4;

Fig. 6 is an enlarged view showing a portion B in Fig. 4;

Fig. 7 is a perspective view showing a center chassis of the apparatus body.

Figure 8 is a plan view showing the center chassis of the apparatus body.

9(a) and 9(b) are views showing a substrate on which a light-emitting element of the device body is attached, and Fig. 9(a) is a front view, and Fig. 9(b) is a top side view.

Fig. 10 is a cross-sectional view showing a state in which the lighting fixture is attached to a ceiling surface.

Fig. 11 is a cross-sectional view showing a state in which the lighting fixture is mounted on the ceiling surface in a completed state.

Fig. 12 is a plan view schematically showing a state of light emitted from a light-emitting element of a light guide plate of the luminaire main body.

Fig. 13 is a perspective view showing a lighting fixture according to a second embodiment of the present invention.

Fig. 14 is a perspective view showing the lighting fixture in an exploded manner.

Fig. 15 is a perspective view showing the main body of the device as viewed from the back side.

Fig. 16 is a plan view showing the apparatus body as seen from the back side.

Fig. 17 is a plan view showing the cover member removed in a state in which the adapter body is attached to the adapter, as viewed from the front surface side.

Fig. 18 is a cross-sectional view showing the main body of the device.

Fig. 19 is an enlarged view showing a portion A in Fig. 18;

Fig. 20 is an enlarged view showing a portion B in Fig. 18;

Fig. 21 is a cross-sectional view showing a state in which the lighting fixture is attached to a ceiling surface.

Fig. 22 is a perspective view showing the lighting device of the luminaire main body viewed from the front surface side.

Figure 23 is a perspective view showing the center chassis and the adapter guide of the device body.

Fig. 24 is a perspective view for explaining a connection relationship between a power connector on the lighting device side and a power connector on the adapter side.

Fig. 25 is also a perspective view for explaining a connection relationship between the power connector on the lighting device side and the power connector on the adapter side.

1‧‧‧ Appliance body

2‧‧‧Adapter

3‧‧‧Lighting device

4‧‧‧Supporting chassis

5‧‧‧Center chassis

6‧‧‧ Adapter guide

7‧‧‧Light source department

8‧‧‧Light guide plate

9‧‧‧ body frame

10‧‧‧Caps

21‧‧‧Cards

22‧‧‧Power cord

23‧‧‧Power connector

33a‧‧‧Power connector

61‧‧‧Clock mouth

C‧‧‧ appliance mounting surface (ceiling surface)

Cb‧‧‧Wiring device (ceiling body)

S‧‧‧Auxiliary parts unit

Claims (7)

A lighting fixture characterized by comprising: an adapter electrically and mechanically connected to a wiring fixture provided on an appliance mounting surface; and a light guide plate having an opening at a substantially central portion facing the adapter and having a quadrangular shape on the outer peripheral portion The opposite side has a light incident end surface; and the luminaire main body includes a illuminating element disposed so that the emitted light is incident on the light incident end surface of the light guide plate, and a lighting device that performs lighting control on the illuminating element And mounted on the adapter, and the appliance body includes a central chassis forming an opening through which the adapter is inserted. The lighting fixture according to claim 1, wherein the center chassis forms an abutting portion facing the back side of the light guide plate on one end side, and the adapter is inserted at the other end side. The opening is open. The lighting fixture of claim 2, wherein the abutting portion of the center chassis is disposed around an opening of the light guide plate. The lighting fixture of any one of claims 1 to 3, wherein: the appliance body comprises a support chassis, the support chassis having an opening facing the opening of the light guide plate, The back side of the light guide plate is supported and a bottom surface is formed. The lighting fixture of claim 2, wherein: the central chassis is formed in a box shape, and is formed on the side wall thereof The outlet of the power connector that is connected to the lighting device. The lighting fixture according to claim 1, wherein the opening of the light guide plate has a shape or a circular shape in which a corner of the square is chamfered. The lighting fixture according to claim 1, wherein the light-emitting elements are arranged in a straight line and are located orthogonal to the straight line arranged in a straight line and with an opening of the light guide plate. Tangent lines.