JP2013080679A - Lighting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lighting device capable of improving brightness feeling by avoiding a phenomenon in which the center part becomes a dark part, and uniformalizing luminance of the light-emitting surface.SOLUTION: The lighting device is provided with a fitting member 1 which has a fitting part 4 for installing on a device fitting surface C in the nearly center portion, a light guide plate 6 which has a light incident end face 61 at the outer circumference portion and is arranged so as to cover the front side of the fitting member 1 including the fitting part 4, and a light source part body 2 which has a light-emitting element 51 arranged so that emission light may enter into the light incident end face 61 of the light guide plate 6, and is installed openably and closably on the front side of the fitting member 1.

Description

  Embodiments described herein relate generally to an illumination device that performs illumination using a light guide plate with a light emitting element such as a light emitting diode (hereinafter referred to as LED) as a light source.

  Recently, along with higher output and higher efficiency of LEDs, lighting devices that use LEDs as light sources and can be used indoors or outdoors can be expected. This illuminating device is obtained by mounting a plurality of LEDs on a substrate so as to obtain a predetermined brightness, and is used as, for example, a ceiling light for a general house 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 illumination device that performs illumination using a light guide plate has been developed.

  In the case of such an illuminating device, for example, an adapter is electrically and mechanically connected to a hanging ceiling body that is a wiring device installed on a ceiling surface, and the illuminating device main body is attached to the adapter. Therefore, when attaching or removing the illuminating device main body, an opening corresponding to the adapter is formed in the central portion of the light guide plate so that the adapter can be operated.

JP 2011-171146 A International Publication No. 2011/081246

  However, in the illumination device as described above, the opening in the central portion formed corresponding to the adapter is a portion where light is not guided, and this portion becomes dark and a phenomenon occurs in which the central portion becomes a dark portion.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide an illumination device that can avoid the phenomenon that the central portion becomes a dark portion, uniform the luminance of the light emitting surface, and improve the feeling of brightness.

  The illuminating device by embodiment of this invention is provided with the attachment member which has the attachment part for attaching to an apparatus attachment surface in a substantially center part. In addition, a light source unit main body that can be opened and closed is provided on the front side of the mounting member, and the light source unit main body has a light incident end surface on the outer peripheral portion and covers the front side of the mounting member including the mounting unit. And a light emitting element disposed so that outgoing light is incident on the light incident end face of the light guide plate.

  According to the embodiment of the present invention, it is possible to provide an illumination device that can make the luminance of the light emitting surface uniform and improve the feeling of brightness.

It is a perspective view which shows the illuminating device which concerns on embodiment of this invention. It is sectional drawing which shows the attachment state to the ceiling surface of the said illuminating device. In the state of FIG. 2, it is sectional drawing which shows a mounting member and a light source part main body separately. It is a perspective view which decomposes | disassembles and shows the light source part main body in the illumination device. It is an enlarged view which shows the A section in FIG. In the same illuminating device, the attachment procedure to the ceiling surface is shown and it is sectional drawing which shows the state which attached the attachment member. In the same illuminating device, the attachment procedure to a ceiling surface is shown, and it is sectional drawing which shows the initial stage process which attaches a light source part main body to an attachment member. Similarly, in the lighting device, a procedure for attaching to the ceiling surface is shown, and is a cross-sectional view showing a process in the middle of attaching the light source unit main body to the attachment member.

The illuminating device of this embodiment is a type used by being attached to a hanging sealing body as a wiring fixture installed on the device attachment surface, and for example, illuminates a room using a light guide plate.
Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 to 8. In addition, the same code | symbol is attached | subjected to the same part in each figure, and the overlapping description is abbreviate | omitted.

  As shown in FIGS. 1 to 5, the lighting device includes a mounting member 1 and a light source unit body 2. The mounting member 1 is provided with a lighting device 3 and an adapter guide as the mounting portion 4. The light source unit body 2 includes a light source unit 5, a light guide plate 6, a support chassis 7, a body frame 8, and an auxiliary component unit 9 provided with a plurality of electrical auxiliary components.

  Further, the illuminating device is an infrared remote control transmitter Rc that controls the lighting state of the adapter A and the light source unit 2 that are electrically and mechanically connected to the hanging ceiling body Cb installed on the ceiling surface C as the device mounting surface. It has. Such an illuminating device 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. These components will be described sequentially.

  The mounting member 1 is a device body that is formed in a substantially square shape from a flat plate of a metal material such as a cold rolled steel plate, and has a convex rear surface so that the front surface is open, and is specifically a chassis. In a substantially central portion, a circular opening 11 is formed in which a hanging sealing body Cb installed on the ceiling surface C and a mounting portion 4 described later facing the adapter A are arranged.

Further, at two locations of the open edge on one side (on the left side in the figure) of the mounting member 1, locking receiving brackets 12 that are bent in a key shape and protrude outward are mounted by fixing means such as screws. ing. On the other hand, at two locations of the open edge on the other side (on the right side in the figure), locking catches 13 projecting to the back side so as to face the latching catches 12 are similarly screwed or the like. Installed by fixing means.
Further, a sponge packing P is attached to the back side of the attachment member 1.

  The lighting device 3 is attached to the attachment member 1 and includes a circuit board 31 and a circuit component 32 mounted on the circuit board 31. The circuit board 31 is made of an insulating material such as glass epoxy resin, and is formed in a plate shape. On the surface side, circuit components 32 such as a control IC, a capacitor, a winding component, and a resistance element are mounted. Further, a power receiving connector Cn1 connected to the power source side (adapter A side) and a lead wire L1 as a wiring connecting member connected to the circuit board 31 for connection to the load side, that is, the light source unit 5 side. Is provided with a power feeding connector Cn2. Furthermore, components having a relatively small height such as switching elements and surface-mounted components are mounted on the back side of the circuit board 31.

  In the drawing, the circuit board 31 is attached to the inside of the attachment member 1 with the front surface side down, and around the opening 11 by a resin fixture 31a. The resin fixture 31 a is arranged so that the tip protrudes from the back side to the front side of the mounting member 1, and is pressed into a mounting hole formed in the circuit board 31.

  When the circuit board 31 is attached, the power receiving connector Cn1 is positioned on the opening 11 side, that is, the inner peripheral side, and the power feeding connector Cn2 is positioned on the outer peripheral side.

  The lighting device 3 as described above is connected to the commercial AC power source through the adapter A, with the adapter A side being electrically connected to the power receiving connector Cn1 as described later. Therefore, the lighting device 3 receives this AC power supply, generates a DC output, and supplies the DC output to the light source unit 5 from the lead wire L1 through the power feeding connector Cn2.

  The attachment portion 4 is an adapter guide, a member through which the adapter A is inserted and engaged, and a member for attaching the lighting device to the ceiling surface C. The adapter guide is formed in a substantially rectangular shape with a slight thickness dimension, and a circular engagement port 41 through which the adapter A is inserted and engaged is provided at the center. The adapter guide is disposed corresponding to the opening 11 formed in the substantially central portion of the mounting member 1.

Note that the attachment portion 4 is not necessarily a member referred to as an adapter guide or the like. For example, it may be an opening formed in a chassis or the like, and means a member or a portion that is opposed to the hooking sealing body Cb as a wiring device and to which the adapter A is engaged. The point is a member or part for attaching the lighting device to the ceiling surface C.
Next, the light source unit main body 2 includes a light source unit 5, a light guide plate 6, a support chassis 7, a main body frame 8, and an auxiliary component unit 9.

  As shown in FIGS. 2 to 5, the light source unit 5 includes a substrate 52 on which the light emitting element 51 is mounted, and an attachment plate 53 as an attachment member to which the substrate 52 is attached.

  As representatively shown in FIG. 4, the substrate 52 is formed in a horizontally-long rectangular shape and is made of a flat plate of glass epoxy resin as an insulating material, and a wiring pattern formed of copper foil is applied to the surface side. Has been. Further, a resist layer is appropriately laminated on the wiring pattern. Note that when the material of the substrate 52 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 51 is an LED, which is a surface mount type LED package. A plurality of the LED packages are mounted and arranged in a straight line along the longitudinal direction of the substrate 52. The LED package is roughly composed of an LED chip disposed in a cavity formed of ceramics or synthetic resin, and a translucent resin for molding such as epoxy resin or silicone resin that seals the LED chip. It is configured.

  The LED chip is an 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 52, and you may make it mount a bullet-type LED, and a mounting system and a form are not specifically limited.

  The mounting plate 53 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 channel shape. The substrate 52 is attached to the inner wall of the attachment plate 53 by screwing or the like so that the back side thereof is in close contact. Therefore, the light source unit 5 is unitized by attaching the substrate 52 to the attachment plate 53.

In the present embodiment, as shown mainly in FIG. 4, two unitized light source parts 5 are used, and are arranged corresponding to two opposing sides of the light guide plate 6. Yes. The unitized light source parts 5 are electrically connected to each other by a lead wire L2, and from one light source part 5, the power receiving connector Cn3 is connected to the substrate 52 and led out by the lead wire L3. Is provided.
The unitized light source unit 5 may be disposed so as to correspond to each side of the light guide plate 6 and can be appropriately selected according to the design.

  The light guide plate 6 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. In addition, among the side end surfaces of each side of the rectangular shape that is the outer peripheral portion of the light guide plate 6, light that is emitted from the light emitting element 51 enters the light that travels in the light guide plate 6. It functions as the incident end face 61.

  The substrate 52 of the light source unit 5 is disposed on the light incident end face 61 of the light guide plate 6. That is, as shown mainly in FIG. 5, the plurality of light emitting elements 51 are arranged in a straight line on the substrate 52 so that light enters the light incident end face 61 of the light guide plate 6. The light guide plate 6 covers the front side of the attachment member 1 including the attachment portion 4.

  The support chassis 7 also serves as a heat dissipation member and functions as a heat dissipation member. The support chassis 7 is formed in a substantially square shape having a relatively large area from a metal material such as aluminum having thermal conductivity, and has a square-shaped shallow dish-like recess 71 on the back side. An attachment piece 72 is formed on each side of the recess 71 so as to bend and extend outward in a step shape. The front side of the recess 71 is configured as a support surface that supports the light guide plate 6.

  The main body frame 8 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 6. As shown in FIG. And a bottom wall 82 having an inclined portion extending obliquely downward inward from the lower end portion of the side wall 81 and rising obliquely inward. A plurality of bosses 83 are erected on the bottom wall 82, and the attachment pieces 72 of the support chassis 7 are screwed to the bosses 83.

  Further, locking metal fittings 85 having locking holes 85a and projecting outward are attached by two fixing means such as screws at two positions on the opposite side of the main body frame 8 (left side in the drawing). ing. On the other hand, locking metal fittings 86 are attached at two positions on the other side (on the right side in the drawing) so as to face the locking metal fittings 85. This locking metal fitting 86 is a clamp metal fitting, is formed in a curved shape and has a spring property, and is provided with a locking portion 86a on the front end side and pivotally supported on the main body frame 8 so as to be rotatable. .

Such locking metal fittings 85 and 86 are disposed so as to face the locking metal fittings 12 and 13 provided in the mounting member 1 described above, and as will be described in detail later, 13 is locked.
In the present embodiment, the locking metal parts 85 and 86 and the locking metal parts 12 and 13 constitute a locking means.

  The auxiliary component unit 9 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 components in this embodiment are an infrared remote control signal receiver, a nightlight, and a channel setting switch.

  The auxiliary component unit 9 is disposed on the outer peripheral edge of the lighting device, specifically on the outer peripheral edge of the main body frame 8. Accordingly, the light guide plate 6 is arranged outside the light emitting region. The auxiliary component unit 9 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 8.

  As shown in FIGS. 2 and 3, the adapter A is electrically and mechanically connected to the hooking sealing body Cb installed on the ceiling surface C by a hooking blade provided on the upper surface side. 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, from this adapter A, a power cord L4 to be connected to the lighting device 3 is led out, and a power connector Cn4 is connected to the tip of the cord. The power connector Cn4 is connected to a power receiving connector Cn1 provided in the lighting device 3.

  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 9, that is, the infrared remote control signal receiving unit, the light emission state of the light emitting element 51 in the light source unit 5, that is, control of all-light lighting, dimming lighting, extinguishing, etc. It can be performed.

  In the illuminating device configured as described above, as representatively shown in FIGS. 2 and 5, the support chassis 7 that functions as a heat radiating member is disposed on the back side of the light guide plate 6, and includes a plurality of bosses of the main body frame 8. 83 is attached by screwing. In this state, the mounting piece 72 of the support chassis 7 is in thermal contact with the upper surface of the mounting plate 53 of the light source unit 5 in surface contact. Therefore, the mounting piece 72 is a thermal coupling portion between the light source unit 5 and the support chassis 7.

As shown in FIG. 5, the outer peripheral edge portion on the front side of the light guide plate 6 is supported by the inclined portion of the bottom wall 82 in the main body frame 8. On the other hand, the support chassis 7 is disposed on the back side of the light guide plate 6 as described above, and the light guide plate 6 is sandwiched between the support chassis 7 and the inclined portion of the bottom wall 82 of the main body frame 8. It is arranged so that. In this state, the light incident end face 61 of the light guide plate 6 is positioned facing the light emitting element 51 so that light emitted from the light emitting element 51 is incident thereon.
Next, a procedure for attaching the lighting device configured as described above to the ceiling surface C will be described with reference to FIGS. 2 and 3 and FIGS.

  First, as shown in FIG. 3, the 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.

  In this state, the attachment member 1 side is attached to the adapter A as shown in FIG. Specifically, the fitting member 41 is engaged until the engagement portion A1 of the adapter A is securely engaged with the engagement port 41 of the adapter guide while the engagement portion 41 of the adapter guide as the attachment portion 4 in the attachment member 1 is aligned with the adapter A. 1 is pushed up from below by hand to perform the mounting operation. In this state, the power connector Cn4 led out from the adapter A is connected to the power receiving connector Cn1 of the lighting device 3.

  Next, the light source unit main body 2 side is attached to the mounting member 1. As shown in FIG. 7, the locking hole 85 a in the locking metal fitting 85 of the main body frame 8 is inserted into the key-shaped locking metal fitting 12 of the mounting member 1 and is hooked and supported. Thereafter, the power feeding connector Cn2 led out from the lighting device 3 and the power receiving connector Cn3 led out from the light source unit 5 are connected. In this case, as shown in FIG. 6, the power feeding connector Cn2 led out from the lighting device 3 hangs downward due to its own weight, and thus is led out from the power feeding connector Cn2 and the light source unit 5. The connection work with the power receiving connector Cn3 is facilitated.

  Subsequently, as shown in FIG. 8, the light source unit body 2 is rotated with the locking metal fitting 85 side as a fulcrum, and is closed so as to cover the front side of the mounting member 1. In this state, the locking fitting 86 pivotally supported by the main body frame 8 is rotated, and the locking portion 86a is engaged with the locking receiving fitting 13 protruding to the back side with a predetermined coupling force with elasticity. This state is an attachment completion state (refer FIG. 2).

  In the mounting state of the lighting device, the adapter A is inserted through the opening 11 of the mounting member 1, the locking portion A 1 of the adapter A is locked to the engaging port 41 of the adapter guide, and the packing provided on the back side of the mounting member 1 P is elastically deformed, and is interposed between the back surface side of the mounting member 1 and the ceiling surface C in a compressed state. Therefore, the lighting device is firmly engaged with the adapter A without being rattled, and the mounting state is stably maintained.

When the illumination device is removed, generally, the locking metal fitting 86 pivotally supported on the main body frame 8 is rotated to release the engagement with the locking metal fitting 13, and the light source unit main body 2 is removed. Remove from the mounting member 1 and open the front side of the mounting member 1. Then, the attachment member 1 can be removed by operating the lever provided on the adapter A to release the engagement of the locking portion A1 of the adapter A.
As described above, the light source unit main body 2 can be attached to the front side of the attachment member 1 so as to be openable and detachable.

  In the mounting state of the lighting device as described above, the lighting device 3 is disposed on the mounting member 1 side. For this reason, the weight of the light source unit main body 2 side coupled to the mounting member 1 is reduced, the load applied to the locking metal fittings 85 and 86 and the locking metal fittings 12 and 13 constituting the locking means is reduced, and the strength is increased. Is advantageous.

  Further, since the power receiving connector Cn1 provided in the lighting device 3 is positioned on the inner peripheral side and the power feeding connector Cn2 is positioned on the outer peripheral side, the power receiving connector Cn1 is connected to the adapter A. The power supply connector Cn2 is positioned close to the light source unit 5. Accordingly, each distance is shortened, the lead wires L1 and L3 as the wiring connecting members can be shortened, and connection work is facilitated. Further, the wiring connecting member such as the connector is disposed on the side of the locking bracket 85 and the locking bracket 12 that serve as the pivot of the light source unit body 2, so that the light source unit body 2 is rotated by the locking means. Also in relation to the dynamic operation, the lead wires L1 and L3 can be shortened (see FIG. 7).

  Only one of the lead wire L1 and the lead wire L3 may be provided, and only the connector may be provided on the other. For example, the power receiving connector Cn3 may be directly mounted on the substrate 52 of the light source unit 5 without providing the lead wire L3.

  For example, when power is supplied to the lighting device 3 by operating the infrared remote control transmitter R in the mounted state of the lighting device, the light emitting element 51 is energized through the substrate 52, and each light emitting element 51 is turned on by the lighting device 3. Lighting control is performed. The light emitted from the light emitting element 51 enters the light incident end face 61 of the light guide plate 6, and this incident light is totally reflected in the light guide plate 6 and spreads over the entire light guide plate 6, and is formed on the back side. The light that is reflected and diffused by the dot pattern composed of the reflective dots and the reflective sheet is radiated from the front side.

  In this case, the light guide plate 6 covers the front side of the mounting member 1 including the mounting portion 4, so that no dark portion is generated at the center of the light guide plate 6, that is, the luminance of the light emitting surface is uniform. Therefore, it is possible to realize a good light distribution state and improve the feeling of brightness.

  Further, the heat generated from each light emitting element 51 is conducted from the back surface side of the substrate 52 to the mounting plate 53, further conducted to the support chassis 7, and effectively dissipated over a wide area of the support chassis 7.

  As described above, according to the present embodiment, it is possible to provide an illumination device that can make the luminance of the light emitting surface uniform and improve the feeling of brightness without producing a dark portion at the center of the light guide plate 6.

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. The above embodiment is presented as an example, and is not intended to limit the scope of the invention.
For example, in the above-described embodiment, the case where the lighting device is disposed on the attachment member side has been described, but this does not prevent the lighting device from being disposed on the light source unit main body side.

  Further, as the locking means, a hinge structure may be applied, and the light source body may be attached to the front side of the attachment member so as to be opened and closed. Furthermore, for example, the light source unit main body may be attached to and detached from the mounting member by providing clamp fittings on opposite sides of the main body frame. Also in this case, the front side of the mounting member can be opened and closed by the light source body. Thus, various structures can be applied to the locking means, and the locking means is not limited to a specific one.

  In the above embodiment, the light guide plate formed in a rectangular shape is used and the light emitting surface is formed in a substantially square shape.For example, the light guide plate is formed in a hexagonal shape, an octagonal shape, etc. A light emitting element is arranged corresponding to each of these sides, the main body frame is formed in a circular shape, and the light emitting surface of the light guide plate is exposed in a circular shape so that a circular light emitting surface is formed. It can also be configured.

DESCRIPTION OF SYMBOLS 1 ... Mounting member, 2 ... Light source part main body,
3 ... lighting device, 4 ... mounting part (adapter guide),
5 ... Light source part, 6 ... Light guide plate,
7 ... Support chassis, 8 ... Body frame,
9 ... Auxiliary component unit, 12, 13 ... Locking bracket,
51 ... Light emitting element (LED), 52 ... Substrate,
53 ... Mounting member (mounting plate), 85, 86 ... Locking bracket,
61: Light incident end face, A: Adapter,
C: Device mounting surface (ceiling surface), Cb: Wiring device (hanging ceiling body),
Cn2 ... Wiring connection member (power supply connector), R ... Infrared remote control transmitter

Claims (3)

An attachment member having an attachment portion for attachment to the device attachment surface at a substantially central portion;
A light guide plate having a light incident end surface on the outer periphery and covering the front side of the mounting member including the mounting portion, and arranged so that outgoing light is incident on the light incident end surface of the light guide plate. A light source body that is provided on the front side of the mounting member so as to be openable and closable.
An illumination device comprising:   The lighting device according to claim 1, wherein a lighting device that controls lighting of the light emitting element is disposed on the attachment member side.   The lighting device according to claim 2, wherein a wiring connecting member connected to the light emitting element is provided on an outer peripheral side of the lighting device.

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