JP4915672B2 - Surface light emitting device fixing structure - Google Patents

Description

  The present invention relates to a fixing structure of a surface light emitting device used as a light source of a guide lamp or a backlight of a liquid crystal display panel.

  2. Description of the Related Art Conventionally, surface light emitting devices have been used as light sources for indicator lamps and other display lamps, as backlights for liquid crystal display panels (liquid crystal panels), or for light production and illumination (see, for example, Patent Document 1). ).

As shown in FIG. 4, the surface light emitting device has one end face of the light guide plate 1 as an incident surface 11 on which light is incident, and a surface on the front side of the light guide plate 1 is an output surface 12 from which the incident light is emitted In this so-called edge light system, a light-transmitting decorative panel 5 on which a pattern, a colored filter, or the like is formed is arranged on the surface of the emission surface 12 to form a light emitting surface on which almost the entire surface is illuminated. A light source 2 is arranged in the longitudinal direction on one side end surface that becomes the incident surface 11 of the light guide plate 1, and the light from the light source 2 is spread over the entire light guide plate 1 so that the entire emission surface 12 is substantially uniform. It is made to emit light like this.
JP-A-5-242710

  By the way, such a surface light emitting device is often installed in a part where there is a high risk of falling, such as a wall or a ceiling, and it is necessary to attach and detach it for maintenance. The mounting base 4 is fixed to the surface 6, and the light guide plate 1 and the light source 2 are held on the mounting base 3 by the holding frame 3 and are detachably attached by screws or the like, so that the mounting base 4 can be firmly attached and detached. It is easy.

  The holding frame 3 holds the periphery of the light guide plate 1 and the decorative panel 5 and the light source 2 by a holding portion 31 having a U-shaped cross section, and a fixed portion 32 is provided on the outer periphery of the holding portion 31. An insertion hole 33 is formed in the portion 32. The mounting base 4 fixed to the mounting surface 6 is screwed with a screw hole 44b into which a fixing screw 44a for fixing the holding frame 3 is screwed, and an insertion hole of the fixed portion 32 of the holding frame 3 The holding frame 3 is fixed to the mounting base 4 by superimposing 33 so as to communicate with the screw hole 44b of the mounting base 4 and screwing the fixing screw 44a into the screw hole 44b through the insertion hole 33. It is. In the figure, reference numeral 8 denotes a joint member attached to the attachment surface 6.

  However, in such a fixing structure of the surface light emitting device, it is difficult to see the fixing screw 44a of the mounting base 4 from the front (from the front), and thus the blindfold member 7 is provided in the front. However, the holding part 31 and the blindfold member 7 of the holding frame 3 look like a frame, and the design is impaired.

  The present invention has been invented in view of the above-mentioned conventional problems, and its object is to firmly and easily attach and detach the holding frame holding the light guide plate and the light source to the mounting base fixed to the mounting surface. It is another object of the present invention to provide a fixing structure of a surface light emitting device that allows the holding frame and fixing screws to be seen and the front surface to look like a frame and does not impair the design.

  In order to solve the above problems, in the invention according to claim 1, the side end surface of the light guide plate 1 is the incident surface 11 on which the light is incident, and the front surface is the emitting surface 12 from which the incident light is emitted. The light source 2 is disposed on the incident surface 11 of the optical plate, the periphery of the light guide plate 1 and the light source 2 are held by the holding portion 31 of the holding frame 3, and a fixed portion 32 is provided on the outer periphery of the holding portion 31 of the holding frame 3. An insertion hole 33 through which the fixing screw 44a is inserted is formed in the fixed portion 32, and a screw hole 44b in which the fixing screw 44a is screwed to the mounting base 4 fixed to the mounting surface 6 to which the holding frame 3 is mounted. In addition to being screwed, the mounting base 4 is provided with a holding frame receiving piece 45 that surrounds and holds the holding frame 3, and a decorative panel holding means (46) that positions the decorative panel 5 on the front side of the light guide plate 1. The mounting base 4 on the mounting surface 6 The holding frame 3 holding the light guide plate 1 and the light source 2 is accommodated inside the holding frame receiving piece 45 of the mounting base 4 and the fixing screw 44a is inserted into the insertion hole 33 and screwed into the screw hole 44b. Thus, the holding frame 3 is fixed to the mounting base 4, the decorative panel 5 is held by the decorative panel holding portion 46 and is positioned on the front side of the holding frame 3, and the decorative panel 5 is positioned on the front side of the light guide plate 1. The light-transmitting decorative portion 51 is used as the portion to be lighted, and the light-transmitting portion in which the portion positioned around the decorative portion 51 and on the front side of the holding frame 3 does not have light-transmitting properties or is difficult to transmit light. 52.

  With such a configuration, it is possible to attach and detach firmly and easily by detachably fixing to the mounting base 4 fixed to the mounting surface 6, and the fixing screw 44 a and the holding portion 31 of the holding frame 3. Is blindfolded by the hard-to-light transmission part 52 and the front surface does not look like a frame, so that the design is not impaired.

  According to the present invention, it is possible to attach and detach detachably to the attachment base fixed to the attachment surface, and it is possible to attach and detach firmly and at the same time, the decorative part and the hardly transmissive part are formed on the decorative panel. The fixing screw and the holding portion of the holding frame are blindfolded by the light-reflective portion and do not look like a frame, so that the design can be prevented from being damaged.

  Hereinafter, an embodiment of the present invention will be described with reference to FIGS. 1 to 3.

  The surface light emitting device mainly includes a light guide plate 1, a light source 2, a decorative panel 5, and a holding frame 3.

  The light guide plate 1 is a flat plate having a substantially rectangular shape (including a square) when viewed from the front, is formed of a transparent member mainly made of synthetic resin or the like, and has one surface serving as an emission surface 12 from which light is emitted, and at least One side end surface is an incident surface 11 on which light is incident. Further, a light reflecting portion (not shown) is provided on the back surface of the light guide plate 1 opposite to the light exit surface 12. In the present embodiment, the light reflecting portion is formed by providing a reflecting member such as a mirror made of a member different from the light guide plate 1 on the back surface of the light guide plate 1. Or a reflective material may be formed by printing or vapor deposition, or may not be particularly processed, and is not limited. Light incident from the light source 2 disposed along the incident surface 11 is incident from the incident surface 11 of the light guide plate 1, and the incident light travels in the light guide plate 1 and is formed on the rear surface of the light guide plate 1. Of the light that has changed its traveling direction upon hitting the light reflecting portion, the light incident on the emission surface 12 without exceeding the total reflection angle is transmitted and emitted, and the other light is totally reflected on the emission surface 12 and further reflected. The above-described action of the light traveling to the ridge and the light reflected by the light reflection portion being incident on the radiating surface 12 in the heel is repeated, whereby the light spreads throughout the light guide plate 1 and the light guide plate 1 The light is emitted uniformly from almost the entire surface of the light emission surface 12 to emit light. FIG. 2A shows a front view in the light emitting state, and FIG. 2B shows a front view in the unlit state.

  Further, on the front surface of the light guide plate 1, that is, on the exit surface 12 side, a light-transmitting decorative panel 5 on which displays for guide lights and various display lamps are drawn is provided. The decorative panel 5 is a light-transmitting member made of acrylic or other synthetic resin, which is a separate member from the light guide plate 1, and has a substantially rectangular shape in front view that is slightly larger than the front view shape of the light guide plate 1. Yes. The decorative part 51 formed in the central part of the decorative panel 5 and overlapped with the light guide plate 1 forms some display of characters or patterns on the surface by printing or sticking the sheet, and retains light transmittance. ing. Thereby, the light emitted from the emission surface 12 of the light guide plate 1 is transmitted through the decorative panel 5 so that characters for display, patterns and the like appear to shine. It should be noted that only a colored filter may be formed on the decorative portion 51 instead of the display, or it may be used only as illumination, and the application is not particularly limited. A portion around the decorative portion 51 of the decorative panel 5 is a light-transmissive portion 52 that does not transmit light or hardly transmits light (at least the transmittance is 50% or less). The light transmission portion 52 is formed by printing a light shielding material on the back surface of the light guide plate 1. Further, the appearance may be adjusted in accordance with the color tone of the light reflecting portion provided on the back side of the light guide plate 1.

  In the surface light-emitting device of this embodiment, the light source 2 using the point light sources 22 arranged at intervals is used. This is a chip for attaching a point light source 22 composed of a plurality of LEDs (light emitting diodes) or the like to a long resin molded body 21 which is a circuit molded product at an interval, and for limiting a current flowing to each point light source 22. A light source module having a length substantially the same as the length in the longitudinal direction of the incident surface 11 of the light guide plate 1 is configured by mounting a resistor (not shown), and is arranged along the incident surface 11. Note that the point light source 22 is not limited to the LED, and may be a light bulb that emits light in a point shape or another light source 2. The light source 2 may be a linear light source that emits light like a fluorescent lamp.

  The light guide plate 1 and the light source 2 described above are held by a holding frame 3. The holding frame 3 is a metal plate formed by sheet metal or aluminum extrusion, which is arranged in a substantially square shape when viewed from the front so as to hold the side edges around the light guide plate 1. The cross-sectional shape of the holding portion 31 of the holding frame 3 is a substantially U-shape that opens inwardly in a substantially rectangular shape when viewed from the front, and the side other than the incident surface 11 of the light guide plate 1 is located inside the U-shape. While inserting the end portion, the light source 2 and the side end portion are inserted and held at the side end portion on the incident surface 11 side with the light source 2 disposed on the incident surface 11.

  Further, a fixed portion 32 for fixing to the mounting base 4 fixed to the mounting surface 6 such as a wall or a ceiling is provided on the outer periphery of the holding portion 31 of the holding frame 3. A plate-like fixed portion 32 is provided in a substantially square shape outwardly from the outer peripheral surface of the substantially square-shaped holding portion 31.

  The mounting base 4 is a member that is fixed to the mounting surface 6 such as a wall or a ceiling, and is fixed to at least a portion where the fixed portion 32 of the holding frame 3 is located. In this embodiment, the fixed portion of the holding frame 3 is fixed. It has a substantially rectangular outline substantially the same as 32, and is made of metal formed by sheet metal or aluminum extrusion and has high rigidity. The mounting base 4 of this embodiment includes a flat plate-shaped mounting portion 41 that is mounted on a mounting surface 6 such as a wall or a ceiling, and an upright piece 42 that stands up in a direction away from the mounting surface 6 from the peripheral end of the mounting portion 41. The holding piece 3 is stood up in a direction away from the mounting surface 6 from the outer end of the fixing piece 43 and the fixing piece 43 provided continuously from the tip of the standing piece 42 in the outer peripheral direction of the mounting portion 41. And a holding frame accommodating piece 45 for holding the decorative panel 5.

  The mounting portion 41 of the mounting base 4 is firmly fixed to the mounting surface 6 to which the surface light emitting device is mounted by screws, nails or other means.

  The fixing piece 43 of the mounting base 4 has a substantially square shape in front view formed at a position corresponding to the fixed portion 32 of the holding frame 3, and is a fixing screw as a fixing means 44 for fixing the holding frame 3. A plurality of screw holes 44b into which 44a is screwed are provided. Further, an insertion hole 33 through which the fixing screw 44a is inserted is formed through the fixed portion 32 of the holding frame 3 at a position corresponding to the screw hole 44b.

  The holding frame receiving piece 45 of the mounting base 4 has two decorative panels protruding inwardly at the tip end (the end on the side far from the mounting surface 6) with the thickness of the decorative panel 5 or slightly wider than this. Ribs as the holding means 46 project, and the decorative panel 5 is held by the mounting base 4 by inserting the peripheral end of the decorative panel 5 between the ribs and surrounding it with the holding frame receiving piece 45. Is.

  The holding frame 3 holding the light guide plate 1 and the light source 2 has an insertion hole 33 and a screw hole 44 b by overlapping the fixed portion 32 of the holding frame 3 on the fixing piece 43 of the mounting base 4 fixed to the mounting surface 6. The fixing screw 44a is inserted into the insertion hole 33 and screwed into the screw hole 44b (see FIG. 3).

  The mounting base 4 has a structure in which, for example, the holding frame housing piece 45 is attached to the fixing piece 43 of the mounting base 4 later with a screw or the like on at least one side of the substantially square shape in front view. When inserting between them, the holding frame accommodating piece 45 on one side is removed, and the holding frame accommodating piece 45 which has been removed after the decorative panel 5 is inserted between the ribs is attached to complete the fixing.

  In the decorative panel 5, the decorative portion 51 is positioned on the front side of the exposed portion that is not inserted into the holding frame 3 of the light guide plate 1, and the light-transmissive portion 52 around the decorative portion 5 is the holding portion of the holding frame 3. 31 and the fixed part 32, and the light transmission part 52 cannot see the fixing screw 44a of the fixing means 44, the fixed part 32 of the holding frame 3, and the holding part 31, and the decorative panel. Thus, it is possible to give a sense of unity to the entire makeup part 51 and the light transmission part 52, and the design is not impaired. Further, since the light-reflective part 52 is formed in the integrated decorative panel 5, a separate member such as the conventional blindfold member 7 is not necessary, and the cost can be reduced. Further, by adopting a method of fixing with the fixing screw 44a as the fixing means 44, it becomes possible to fix it very firmly.

It is principal part sectional drawing of one Embodiment of this invention. (A) shows the front view of a light emission state same as the above, (b) shows the front view of a light extinction state. It is the partially transparent front view of the state which has not provided the decorative panel for convenience in the same as the above. It is principal part side sectional drawing of a prior art example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Light guide plate 11 Incident surface 12 Output surface 2 Light source 3 Holding frame 31 Holding part 32 Fixed part 4 Mounting base 44 Fixing means 45 Holding frame accommodating piece 46 Cosmetic panel holding means 5 Cosmetic panel 51 surface

Claims (1)

  The side end surface of the light guide plate is used as an incident surface on which light is incident and the front surface is used as an output surface from which the incident light is emitted. A light source is disposed on the incident surface of the light guide plate, and the periphery of the light guide plate and the light source are held by a holding frame. A fixing part is provided on the outer periphery of the holding part of the holding frame, an insertion hole through which the fixing screw is inserted is formed in the fixed part, and the fixing part fixed to the mounting surface to which the holding frame is attached A decorative panel holding unit is provided in which a screw hole for screwing a fixing screw is screwed into the base, and a holding frame receiving piece is provided in the mounting base so as to surround and hold the holding frame, and the decorative panel is positioned on the front side of the light guide plate. The mounting base is fixed to the mounting surface, and the holding frame holding the light guide plate and the light source is received inside the holding frame receiving piece of the mounting base, and the fixing screw is inserted through the insertion hole. The holding frame is attached by screwing it into the screw hole. The decorative panel is fixed to the base, and the decorative panel is held by the decorative panel holding part and positioned on the front side of the holding frame. The decorative panel has a light-transmitting decorative part at the front side of the light guide plate. A fixing structure for a surface light emitting device, characterized in that a portion located around the decorative portion and positioned on the front side of the holding frame is a light-reflective portion that does not transmit light or is difficult to transmit light.

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