JP2012009342A - Display lamp - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a display lamp capable of detachably installing a light source block integrated with a display frame on a body unit and consequently improving operability at the time of removing of a light guide plate block.SOLUTION: The display lamp 1 is structured of the body unit 2 which is a rectangular case with an open surface and has a pair of lamp sockets 4 along respective peripheral walls, the light guide plate block 6 arranged facing to the open surface of the body unit 2, four light source blocks 7 mounted on the lamp socket 4 and arranged around the light guide plate block 6, a panel 8 arranged at a front face side of the light guide plate block 6, and the display frame 9 mounted on the open surface of the body unit 2. A pair of fixing metal fittings 17 for fixing the light source blocks 7 along the respective sides are respectively arranged on a back surface of the display frame 9. The light source blocks 7 can be detachably mounted on the body unit 2 by integrating with the display frame 9 by mounting the light source blocks 7 on the fixing metal fittings 17 of the respective pairs and by fixing the light source blocks 7 to the display frame 9.

Description

  BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display lamp having a structure in which light is transmitted from a back side to a panel having a translucency and a display pattern as represented by a guide lamp.

  Conventionally, various kinds of indicator lamps of this kind have been proposed. For example, the indicator lamp 1 (see FIG. 2) described in Patent Document 1 includes a main unit 2 having an opening on one surface and a display unit 3 that covers the opening of the main unit 2. The display unit 3 is detachably attached to the main unit 2.

  The display unit 3 includes a rectangular plate-like panel 8 having diffuse transmittance, a light guide plate block 6 disposed on the back side of the panel 8, a light source block 7 disposed around the light guide plate block 6, and a panel 8. And a display frame 9 surrounding the light guide plate block 6 and the light source block 7.

  The light guide plate block 6 includes a rectangular light guide plate 10. The light guide plate 10 guides light from the side surface, and can uniformly shine the front surface of the light guide plate 10.

  Four light source blocks 7 are provided. The light source block 7 guides the light emission surface of each light source block 7 so that light from a light emission surface (hereinafter referred to as “radiation surface”) enters the light guide plate 10 from each end surface of the light guide plate 10. The optical plate block 6 is attached to the main unit 2 so as to face each end face.

  On the panel 8, a display pattern (for example, a pictogram imitating a person) is drawn. The panel 8 is attached to the back side of the display frame 9, and the display pattern of the panel 8 is exposed from the opening window 9 a of the display frame 9. The panel 8 is disposed on the front side of the light guide plate block 6, and the display frame 9 is attached to the front surface of the main unit 2.

  FIG. 9 shows a part of the indicator lamp 1 described in Patent Document 1. The light source block 7 includes a rectangular box-shaped light source case 12 having an opening on the radiation surface and a back surface, and connection terminals 15 project from the both ends in the longitudinal direction of the light source case 12 toward the rear.

  On the other hand, the main unit 2 is provided with a lamp socket 4. In order to attach the light source block 7 to the main unit 2, the connection terminal 15 is inserted into an insertion hole formed at the front end of the lamp socket 4.

JP 2009-289682 A

  When the light source block 7 is attached to the main unit 2 as described above, when the light guide plate block 6 is removed from the main unit 2, the light guide plate block 6 may come into contact with the light source block 7, and the connection terminal 15 is connected to the lamp socket. There is a possibility of deviating from 4. In the above-described indicator lamp 1, the light source block 7 is attached adjacent to each of the four sides of the light guide plate 10. Therefore, when removing the light guide plate block 6 in the above-described indicator lamp 1, care must be taken not to disconnect the connection terminal 15 from the lamp socket 4 with respect to any of the four light source blocks 7. There is a problem that the nature is bad.

  The present invention has been made in view of the above reasons, and enables the light source block to be attached to and detached from the main body unit integrally with the display frame, thereby improving the workability when removing the light guide plate block. An object is to provide an improved indicator light.

  The indicator lamp of the present invention includes a main unit that houses a lighting circuit, and a display unit that is detachably attached to one surface of the main unit and that turns on a light source by power supplied from the lighting circuit. The display unit has a translucent panel with a display pattern and a front surface facing the back surface of the panel. A light guide plate block that emits light incident from the side face and is emitted from the front side, and a connection terminal that is electrically connected to the light source and inserted into the lamp socket are arranged in a projecting manner and opposed to the side face of the light guide plate block. A light source block; and a display frame that holds the panel and the light source block and is attached to and detached from the main body unit. Characterized in that it comprises.

  In this indicator lamp, the light source block is long in the longitudinal direction of the side surface of the opposing light guide plate block, and the fixture is inserted into the light source block from the back of the display frame so as to sandwich the light source block from the direction intersecting the side surface of the light guide plate block. A pair of fixed pieces projecting to the rear end are provided, and at the rear end of the fixed piece, a drop-off preventing piece that extends toward the other and abuts against the light source block from the rear is provided, and the fixed piece is flexible in the thickness direction. It is desirable to have.

  In this indicator lamp, the light source block is long in the longitudinal direction of the side surface of the opposing light guide plate block, and the fixture is inserted into the light source block from the back of the display frame so as to sandwich the light source block from the direction intersecting the side surface of the light guide plate block. A pair of fixed pieces projecting longer than the rear end are provided, and a rear end of the fixed piece is provided with a drop-off prevention piece that extends in a direction to gradually reduce the distance from the other as the display frame is approached and that the front end contacts the light source block. More preferably, the distance between the front ends of the drop-off preventing pieces is shorter than the width of the light source block in the same direction, and the fixed piece has flexibility in the thickness direction.

  According to the configuration of the present invention, the light source block can be attached to and detached from the main body unit integrally with the display frame, thereby improving the workability when removing the light guide plate block.

(A) is an exploded sectional view of the important part before attaching a display frame in an embodiment, and (b) is a principal part sectional view after attaching the indicator lamp same as the above. It is a disassembled perspective view of an indicator lamp. It is a perspective view of an embodiment. It is principal part sectional drawing same as the above. (A) is an exploded cross-sectional view of the main part before attaching the display frame of another configuration example in the above, and (b) is a cross-sectional view of the main part after attaching the display frame of another configuration example in the same as above. It is operation | movement explanatory drawing of the fixing metal fitting used for the structural example shown in FIG. (A) is an exploded sectional view of the principal part before attaching the display frame of another example of composition in an embodiment, and (b) is the principal part sectional view after attaching the display frame of another example of composition in the same as the above. It is operation | movement explanatory drawing of the fixing metal fitting used for the structural example shown in FIG. It is principal part sectional drawing which shows a prior art example.

  In the present embodiment, an indicator lamp used for a guide light indicating an evacuation route or the like is illustrated, but the technique described in the present embodiment is not prevented from being used for an indicator lamp for other purposes.

  The indicator lamp 1 shown in FIG. 2 has a main body unit 2 that is a rectangular parallelepiped housing having an opening surface on one surface, and a display that is detachably attached to the one surface of the main body unit 2 so as to cover the opening surface of the main body unit 2. It is composed of unit 3.

  In the following description, the vertical direction in FIG. As shown in FIG. 3, a pair of lamp sockets 4 are attached along the four peripheral walls of the main unit 2 (the lamp sockets 4 on the two peripheral walls are not shown). The main unit 2 includes a lighting circuit 5 that supplies power to the lamp socket 4.

  The display unit 3 includes a light guide plate block 6 disposed on the front side of the main unit 2, four light source blocks 7 disposed around the light guide plate block 6, and a panel disposed on the front side of the light guide plate block 6. 8 and a display frame 9 attached to the front surface of the main unit 2. On the panel 8, a display pattern (not shown) (for example, a pictogram imitating a person) is drawn.

  The light guide plate block 6 includes a rectangular light guide plate 10 and a light guide support plate 11 that supports the light guide plate 10 from the back side. The light guide plate 10 is formed of a transparent material such as acrylic resin. On the back side of the light guide plate 10, a configuration is provided in which light is diffusely reflected by appropriate means such as a large number of grooves engraved in a V shape and a large number of dot patterns printed in white.

  The light source block 7 includes a light source case 12 having a rectangular box shape. As shown in FIG. 4, a light source substrate 13 is installed inside both end surfaces in the longitudinal direction of the light source case 12, and a light source 14 made of a light emitting diode is mounted on each light source substrate 13. As shown in FIG. 2, connection terminals 15 project from the both ends of the light source block 7 in the longitudinal direction.

  One surface (hereinafter referred to as “radiating surface”) of the light source case 12 facing each end surface of the light guide plate 10 is opened. As shown in FIG. 4, a light guide 16 formed in a rod shape is disposed between the two light sources 14 disposed inside the light source case 12. Further, the face of the light guide 16 on the back surface (upper surface in FIG. 4) is inclined downward toward the center in the longitudinal direction, and V-shaped grooves or dot printing is performed similarly to the back side of the light guide plate 10. Thus, the reflecting surface 16a is formed (see FIG. 4). Thereby, the light from the light source 14 is reflected in the direction of the radiation surface, and the light source block 7 emits the light emitted from the light source 14 from the radiation surface of the light source case 12.

  The display frame 9 is a rectangular frame having an opening window 9a, and has a peripheral piece extending rearward along the outer periphery thereof. A panel 8 is fixed to the back surface of the display frame 9 by an appropriate method so as to contact the opening. Fixing tools for fixing the light source block 7 are provided on the back surface of the display frame 9 along each side.

  In the present embodiment, a case in which the fixture 17 (see FIG. 1) is used as a fixture. In the present embodiment, a pair of fixing brackets 17 are provided along each side of the back surface of the display frame 9 so as to hold both ends of the light source block 7 in the longitudinal direction. Each fixing bracket 17 is formed in a rectangular frame shape so as to come into contact with the radiation surface at the end portion in the longitudinal direction of the light source block 7, its opposite surface, and the back surface. The light source block 7 is attached to each pair of fixing brackets 17, and the light source block 7 is fixed to the display frame 9.

  Next, a method for attaching the display unit 3 to the main unit 2 will be described. In order to attach the display unit 3 to the main unit 2, first, the light guide plate block 6 is independently attached to the main unit 2, and then the display frame 9 to which the panel 8 and the light source block 7 are fixed is attached to the main unit 2.

  As shown in FIG. 3, a pair of mounting brackets 18 are attached near the upper and lower ends of the left side on the back side of the light guide support plate 11. A notch groove (not shown) opened downward is formed at the rear end of the mounting bracket 18. The body unit 2 is provided with a pair of receiving brackets 19 at positions corresponding to the mounting brackets 18. The metal fitting 19 has an engagement piece facing the opening surface of the main unit 2, and an insertion hole is opened in the engagement piece. The light guide plate block 6 is attached to the main body unit 2 so as to be openable and closable by engaging the notch groove of the mounting bracket 18 with the insertion hole of the receiving bracket 19 (see FIG. 3).

  The display frame 9 is fixed to the front surface of the main unit 2 in a state where the light guide plate block 6 is attached to the main unit 2 (see FIG. 1A). As shown in FIG. 1, the panel 8, the light source block 7, and the display frame 9 are integrally attached to the main unit 2.

  As shown in FIG. 1B, the panel 8 is disposed on the front side of the light guide plate 10. The light source block 7 is attached to the main unit 2 by inserting the connection terminal 15 into an insertion hole 4 a (see FIG. 3) formed in the distal end surface of the lamp socket 4 of the main unit 2. Each light source block 7 is arranged so that the radiation surface faces each end surface of the light guide plate 10. This makes it possible to distribute light more uniformly throughout the light guide plate 10.

  When removing the display frame 9, the panel 8 and the light source block 7 are removed from the main unit 2 together with the display frame 9. Therefore, in the present embodiment, the light source block 7 is always removed in a state where the display frame 9 is removed, and the workability when removing the light guide plate block 6 is improved.

  Further, instead of the fixing bracket 17, a fixing bracket 17a as shown in FIG. 5 may be used. The fixing bracket 17 a is a pair of rectangular plates 20 that protrude from the back surface of the display frame 9 to the back surface of the light source block 7, and the other of the fixing pieces 20 so as to contact the back surface of the light source block 7 from the rear end of each fixing piece 20. A drop-off prevention piece 20a protruding toward the fixed piece 20 is provided continuously and integrally. Therefore, the light source block 7 is sandwiched between the radiation surface of the light source block 7 and the opposite surface thereof by the both fixing pieces 20. In a state where the light source block 7 is fixed to the fixing bracket 17a, the back surface of the light source block 7 comes into contact with the drop-off preventing piece 20a, and the rearward movement is restricted.

  The fixing piece 20 has flexibility in the thickness direction, and can be bent so that the rear end portions increase the distance from each other. Therefore, as shown by a solid line in FIG. 6, the fixing piece 20 is bent in a direction in which the distance between the rear end portions is increased, and the light source block 7 is moved in the front-rear direction with respect to the fixing bracket 17a to be detachable. As a result, the fixing bracket 17a can be easily attached and detached to and from the fixing bracket 17 shown in FIG. Further, the function of the light source block 7 when the display frame 9 to which the light source block 7 is fixed is attached to and detached from the main body unit 2 is the same as that in the case where the above-described fixing bracket 17 is used.

  Further, instead of the fixing bracket 17, a fixing bracket 17b as shown in FIG. 7 may be used. The fixing piece 20 of the fixing bracket 17b protrudes longer rearward than the fixing piece 20 of the fixing bracket 17a. At the rear end of the fixed piece 20, a drop-off preventing piece 20 b extending until it comes into contact with the back surface of the light source block 7 while gradually decreasing the distance from the other as the display frame 9 is approached. When the light source block 7 is fixed to the fixing bracket 17b, the back surface of the light source block 7 comes into contact with the front end of the drop-off preventing piece 20b, and the light source block 7 is restricted from moving backward.

  Similar to the fixing bracket 17a, the fixing piece 20 of the fixing bracket 17b has flexibility in the thickness direction, and the rear end portions can be bent so as to increase the distance from each other. Therefore, as shown by a solid line in FIG. 8A, the fixing piece 20 is bent in a direction that increases the distance between the rear ends, and the light source block 7 is moved in the front-rear direction with respect to the fixing bracket 17a to be detachable. It becomes.

  Further, as shown in FIG. 8B, when a force is applied from behind to the drop-off preventing piece 20b, the force is applied to the fixed piece 20 in a direction that increases the distance between the rear end portions. Thereby, the light source block 7 can be attached to the fixing bracket 17b by pushing the light source block 7 into the fixing bracket 17b. Therefore, the display frame 9 can be attached to the main unit 2 even when the light source block 7 is already attached to the main unit 2 as shown in FIG. Further, the function of the light source block 7 when the display frame 9 to which the light source block 7 is fixed is attached to and detached from the main unit 2 is the same as that in the case where the fixing bracket 17 is used.

DESCRIPTION OF SYMBOLS 1 Indicator lamp 2 Main body unit 3 Display unit 4 Lamp socket 4a Insertion hole 5 Lighting circuit 6 Light guide plate block 7 Light source block 8 Panel 9 Display frame 15 Connection terminal 20 Fixing plate 20a Fall-off prevention piece 20b Fall-off prevention piece

Claims (3)

A main unit that houses a lighting circuit; and a display unit that is detachably attached to one surface of the main unit and that illuminates a light source by power supplied from the lighting circuit. The main unit electrically connects the lighting circuit. The display unit has a translucent panel on which the display pattern is written, and a front surface of the display unit facing the back surface of the panel. A light guide plate block that emits light incident from the side surface arranged from the front surface, and a connection terminal that is electrically connected to the light source and inserted into the lamp socket, and projects from the side surface of the light guide plate block. A light source block arranged; a display frame that holds the panel and the light source block and is attached to and detached from the main unit; Indicator frame is characterized in that it comprises a fixture wherein the light source block is mounted. The light source block is long in the longitudinal direction of the side surface of the light guide plate block facing the light source block, and the fixture is disposed from the rear surface of the display frame so as to sandwich the light source block from a direction intersecting the side surface of the light guide plate block. A pair of fixed pieces projecting to the rear end of the block is provided, and at the rear end of the fixed piece, a drop-off preventing piece that extends toward the other and abuts against the light source block from the rear is provided. The indicator lamp according to claim 1, wherein the indicator lamp has flexibility. The light source block is long in the longitudinal direction of the side surface of the light guide plate block facing the light source block, and the fixture is disposed from the rear surface of the display frame so as to sandwich the light source block from a direction intersecting the side surface of the light guide plate block. A pair of fixed pieces projecting longer than the rear end of the block is provided, and the rear end of the fixed piece extends in a direction in which the distance from the other gradually decreases as it approaches the display frame, and the front end contacts the light source block The drop-off prevention piece is provided, a distance between front ends of the drop-off prevention piece is shorter than a width of the light source block in the same direction, and the fixed piece has flexibility in a thickness direction. Indicator light.

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