JP2010277792A - Indication lamp - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an indication lamp capable of sensing damages to a locking part of a fixture body and an indication unit. <P>SOLUTION: The indication lamp A is provided with its fixture body 10 with a front face opened; an indication unit 20 equipped with a light guide plate 22 radiating incident light from a top-side end face in plane from a light-emitting face and an indication panel 21, arranged in opposition to the light-emitting face of the light guide plate 22; and a light source unit 30 making light incident into the top-side end face of the indication unit 20. A first locking part and a second locking part are formed, respectively by L-shaped locking pieces 13, 14, formed at a right and a left sidewalls of the fixture body 10 and L-shaped engaging protrusions 25, 26 set protrusively toward the rear of the indication unit 20. When the first locking part is damaged, the indication unit 20 is retained by the second locking part to the fixture body 10, and a gap is generated outside the fixture body 10, where the light from the light source unit 30 is irradiated. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an indicator lamp.

  Conventionally, as a display light such as a guide light, for example, a display lamp that can be miniaturized by using a mounting means that slidably attaches a display panel on which a pictogram for guiding to an evacuation exit is described (for example, is provided) , See Patent Document 1).

  The display lighting apparatus described in Patent Document 1 includes a rectangular parallelepiped apparatus main body having an open front surface. The apparatus main body is provided with a light source and a lighting device that turns on the light source. Unit is installed. On the inner side surfaces of the left and right sides of the instrument body, there are two L-shaped guide walls in the vertical direction, each of which includes a holding piece that extends along the front surface of the instrument body and a regulation piece that extends along the front-rear direction of the instrument body. It is provided one by one. The display unit has a display panel on which a pictogram is written. On the back surface side of the display unit, an engagement protrusion that engages with the guide wall and holds the display unit on the instrument body corresponds to each guide wall. It is provided at each position.

  Here, when the display unit is attached to the instrument body, the display unit may move downward by contacting the restriction piece of the guide wall provided in the upper stage with the lower edge side of the corresponding engagement protrusion. In addition to being suppressed, the engagement projection corresponding to the guide piece of the guide wall provided in the lower stage prevents the display unit from moving in the front-rear direction of the instrument body. In this way, the display panel is slidably held on the instrument body by engaging the guide wall and the locking projection.

Japanese Patent Laid-Open No. 2002-23671

  By the way, in the display illuminating device described in Patent Document 1, since the weight of the display unit is continuously applied to the upper restricting piece provided on the guide wall, there is a possibility that it is damaged due to fatigue or other factors. is there. Further, the interval between the upper and lower restricting pieces provided on the guide wall and the interval on the lower edge side of the corresponding engagement protrusion provided on the display unit are set to be approximately equal. For this reason, even if the upper restriction piece or the upper locking protrusion is damaged and the display unit moves downward due to its own weight, the display unit moves downward due to the restriction piece of the guide wall provided at the lower stage. And the position of the display unit before and after the breakage hardly changes. As a result, from the outside of the display lighting fixture, it is impossible to detect that the upper restriction piece or the locking projection is damaged, and the display lighting fixture in a state where the upper restriction piece or the locking projection is damaged is used. There was a problem of continuing to do.

  The present invention has been made in view of the above-mentioned reasons, and the object of the present invention is to break the guide wall regulating piece provided on the upper stage or the locking projection of the display unit when they are damaged. It is an object of the present invention to provide an indicator lamp that can detect the state of the failure and can take measures such as replacement and repair.

  In order to achieve the above object, according to the first aspect of the present invention, a rectangular parallelepiped instrument body having an open front surface, and a light guide that is attached to the opening and that emits light incident from the upper end surface in a planar shape from the light emitting surface. A display unit having a display panel disposed opposite to the light emitting surfaces of the light plate and the light guide plate, and a light source unit attached to the instrument body with the light emitting portion of the light source facing the upper end surface of the display unit A lighting device that is disposed inside the instrument body and lights the light source, and the display unit and the instrument body are engaged with each other and the display unit is held by the instrument body. When the stop portion and the first locking portion are damaged, the display unit is engaged with each other at a position where the display unit is moved downward by a certain amount due to its own weight, and the second engagement unit holds the display unit on the instrument body. With stop The fixed amount is a gap that allows light from the light source to radiate to the outside of the instrument body between the display unit and the instrument body in a state where the display unit is held by the second locking portion. It is characterized in that the dimensions are set so as to generate.

  According to a second aspect of the present invention, in the first aspect of the present invention, the second locking portion of the display unit is in a state where the display unit is held by the instrument body by the first holding portion. The movement in the front-rear direction is limited.

  According to a third aspect of the invention, in the invention according to any one of the first and second aspects, the second locking portion is caused by its own weight from a position where the display unit is held by the first locking portion. It also serves as a means for guiding the display unit when moving downward by the predetermined amount.

  According to a fourth aspect of the present invention, in the invention according to any one of the first to third aspects, the fixed amount is from the light source in a state where the display unit is held by the second locking portion. The dimension is set such that the brightness of the display panel is equal to or higher than a predetermined reference value by light.

  According to the first aspect of the present invention, when the first locking portion is damaged, the display unit is held on the instrument body by the second locking portion. At this time, since the display unit moves downward to a position where the light from the light source is directly irradiated to the outside from the instrument body, it can be easily detected that the first locking portion has been damaged, It is possible to take measures such as repairs.

  According to the second aspect of the present invention, when the display unit is held on the instrument body by the first locking part, the movement in the front-rear direction is suppressed by the second locking part. The degree of adhesion with the main body can be increased.

  According to the invention of claim 3, when the first locking portion is broken, the movement of the display unit is guided by the second locking portion, so that it is reliably held by the second locking portion. be able to.

  According to the invention of claim 4, even when the display unit is held by the instrument body by the second locking portion, the display panel is caused to emit light at a predetermined reference value or more to function as an indicator lamp. Can continue.

It is a schematic sectional drawing which shows the principal part of the indicator lamp concerning embodiment of this invention, (a) is normal time, (b) shows the time of a failure | damage of a 1st engaging part. It is a disassembled perspective view which shows the indicator lamp. It is a disassembled perspective view which shows the principal part of the indicator lamp.

  Embodiments of the present invention will be described below with reference to FIGS. In the following description, the vertical direction in FIG. 1A is the top and bottom of the indicator lamp A, the horizontal direction in FIG. 1A is the front and rear of the indicator lamp A, and the direction perpendicular to the paper surface in FIG. Is described as the left and right of the indicator lamp A.

  The indicator lamp A of the present embodiment is disposed in the instrument body 10, a rectangular parallelepiped instrument body 10 whose front surface is open, a display unit 20 and a light source unit 30 that are attached so as to cover the opening on the front surface of the instrument body 10. And a lighting device 15 for lighting the display unit 20.

  The light source unit 30 includes, for example, an LED (not shown) as a light source, turns on the light source with lighting power supplied from the lighting device 15, and linearizes light from the light source using, for example, a light guide. The light is emitted toward the lower side of the light source unit 30. Since the display unit 20 is disposed below the light source unit 30 along the opening on the front surface of the instrument body 10, the irradiation light from the light source unit 30 is incident on the upper end surface of the display unit 20.

  The instrument body 10 is made of, for example, a synthetic resin molded product, and the upper wall and the rear wall become power holes for inserting an electric wire (not shown) from a commercial power source into the instrument body 10 by cutting. Knockout portion 11 is formed. In addition, knockout portions 12a and 12b serving as attachment holes through which attachment screws are inserted are formed on the upper wall and the rear wall of the appliance main body 10 to fix the appliance main body to a ceiling surface or a wall surface by cutting. Here, when fixing the instrument main body 10 to a ceiling surface or a wall surface, the knockout parts 11, 12a, 12b are respectively cut and opened as necessary, wires connected to a commercial power source are wired, and mounting screws For example, it can be attached to the ceiling or wall surface, and unnecessary holes can be prevented from being formed in the instrument body 10.

  In addition, a lighting device 15 that is connected to the light source unit 30 through an electric wire and turns on an LED (not shown) that is a light source of the light source unit 30 and a terminal block that is connected to a commercial power source are provided inside the instrument body 10. 16 and an emergency power supply block 17 having a storage battery are disposed. The lighting device 15 is connected to a commercial power supply via a terminal block 16 and an electric wire, and is connected to an emergency power supply block 17 via an electric wire. As a result, the lighting device 15 turns on the light source unit 30 with power supplied from the commercial power supply during normal times, and in the event of an emergency when the commercial power supply fails, the power is supplied from the storage battery of the emergency power supply block 17 to light up the LEDs. be able to.

  Further, L-shaped locking pieces 13 and 14 are formed on the inner surfaces of the left and right side walls of the instrument body 10 with a predetermined interval in the vertical direction. The locking pieces 13 and 14 include holding pieces 13a and 14a extending along the vertical direction, respectively, and restricting pieces 13b and 14b extending rearward from the lower end edges of the holding pieces 13a and 14a.

  As shown in FIG. 3, the display unit 20 includes, for example, a translucent display panel 21 on which a pictogram for guiding to an evacuation exit is written, and the light of the light source unit 30 disposed on the rear surface side of the display panel 21. A light guide plate 22 that guides light to the display panel 21, a reflection sheet 23 disposed on the rear surface of the light guide plate 22, and a panel case made of synthetic resin that holds the display panel 21, the light guide plate 22, and the reflection sheet 23. 24.

  The panel case 24 has a rectangular mounting base 24a having a lateral width substantially equal to the lateral width of the instrument body 10 and having a vertical width slightly smaller than the vertical width of the instrument body 10, and an upper side at the periphery of the mounting base 24a. A holding frame 24b that is continuously and integrally projected forward along the three removed sides, and guide grooves 24c for slidably holding the display panel 21 on the inner surfaces of the left and right sides of the holding frame 24b. Is formed.

  From the left and right edges of the display panel 21, side pieces 21 a protrude from the rear. Here, the display panel 21, the light guide plate 22, and the reflection sheet 23 are overlapped, and the side piece 21 a is introduced into the guide groove 24 c from above the holding frame 24 b of the panel case 24 and is slid downward. Is held by the panel case 24. At this time, the movement of the display panel 21 in the downward direction, the front-rear direction, and the left-right direction is restricted by the panel case 24.

  The light guide plate 22 is formed so that its thickness is reduced toward the lower side in the vertical direction. Light incident from the upper end face is emitted uniformly on the light emitting surface on the front side of the light guide plate 22. Is set to

  Engagement protrusions 25 and 26 are provided on the left and right ends of the rear surface of the mounting base 24a with a space in the vertical direction. The engagement protrusions 25 and 26 are formed in an L shape when viewed from above, protrude rearward from the rear surface of the mounting base 24a, and further protrude outward from the rear end portion in the left-right direction. Here, the engaging protrusions 25 and 26 correspond to the locking pieces 13 and 14, respectively. The engaging protrusion 25 and the locking piece 13 constitute a first locking portion. The stop piece 14 constitutes a second locking portion.

  When attaching the panel case 24 to the instrument main body 10, the panel case 24 is first brought into close contact with the front side of the instrument main body 10 so as to close the opening of the instrument main body 10, and then the panel case 24 is attached to the front surface of the instrument main body 10. Slide it downward along the line. As a result, as shown in FIG. 1A, the front surface of the upper engagement protrusion 25 abuts the holding piece 13a to bring the panel case 24 into close contact with the instrument body 10, and the lower end side of the engagement protrusion 25 is restricted. The panel case 24 is held by the instrument main body 10 by contacting the piece 13b and restricting the panel case 24 from moving below the instrument main body 10. In addition, the front surface of the lower engagement protrusion 26 is in contact with the holding piece 14a, so that the lower portion of the panel case 24 is prevented from moving in the front-rear direction, and the degree of adhesion between the panel case 24 and the instrument body 10 is increased. It is increasing. Note that the positions of the engaging protrusions 26 and the locking pieces 14 are set so that a certain distance L is opened between the lower end side of the engaging protrusions 26 and the holding piece 14a. In addition, after attaching the panel case 24 to the front surface of the instrument main body 10, the light source unit 30 is attached so that the remaining opening part of the front surface of the instrument main body 10 may be covered.

  Here, for example, when the restricting piece 13b of the upper locking piece 13 is broken (see FIG. 1B), the panel case 24 moves downward due to its own weight. At this time, since the front surfaces of the engaging protrusions 25 and 26 and the holding piece 14a are in contact with each other to increase the adhesion between the panel case 24 and the instrument body 10, the engaging protrusions 25 and 26 and the holding pieces 13a and 14a are It functions as a guide when the panel case 24 moves, and prevents the panel case 24 from falling away from the instrument body 10.

  Further, when the panel case 24 moves downward as much as the interval L, the lower end side of the lower engagement protrusion 26 comes into contact with the restriction piece 14b of the lower restriction piece 14, so that the panel case 24 again becomes the instrument body 10. And the side surface side of the engagement protrusion 26 comes into contact with the holding piece 14 a to bring the panel case 24 into close contact with the instrument body 10. That is, when either the engaging protrusion 25 or the locking piece 13 which is the first locking portion is damaged, the panel case 24 is moved downward by the distance L, and the second locking portion The panel case 24 is held in close contact with the instrument body 10 by a certain engagement protrusion 26 and the locking piece 14.

  At this time, since the opening 40 having the same length as the interval L is opened between the upper end surface of the panel case 24 and the light source unit 30, a part of the irradiation light from the light source unit 30 is irradiated to the outside of the instrument body 10. Will be. As a result, it is possible to detect that either the engagement protrusion 25 or the engagement piece 13 serving as the first engagement portion is damaged, and it is possible to take measures such as replacement or repair.

  Here, the interval L is determined so that the brightness of the display panel 21 changes to the display panel 21 in a state where the panel case 24 is held on the instrument body 10 by the engagement protrusions 26 and the locking pieces 14 which are the second locking portions. It is set so that the displayed pictogram can be correctly recognized and the brightness is higher than a predetermined reference value (for example, 8.5 mm), and the engagement protrusion 25 or the locking piece 13 is damaged. Even if it exists, the function as an indicator light can be continued.

A indicator lamp 10 instrument body 13 locking piece (first locking portion)
13a holding piece 13b regulating piece 14 locking piece (second locking portion)
14a holding piece 14b regulating piece 15 lighting device 20 display unit 21 display panel 22 light guide plate 24 panel case 25 engagement protrusion (first locking portion)
26 Engagement protrusion (second locking part)
30 Light source unit

Claims (4)

A rectangular parallelepiped instrument body having an open front surface, a light guide plate that is attached to the opening and emits light incident from the upper end surface in a planar shape from the light emitting surface, and a display disposed to face the light emitting surface of the light guide plate A display unit having a panel; a light source unit attached to the fixture body with a light emitting portion of the light source facing the upper end surface of the display unit; and the light source disposed inside the fixture body. A lighting device for lighting,
When the display unit and the instrument body are engaged with each other and the display unit is held by the instrument body, and the first locking part is damaged, the display unit is A second locking portion that engages with each other at a position moved downward by a constant weight and holds the display unit on the instrument body,
The fixed amount is a gap that allows light from the light source to radiate outside the instrument body between the display unit and the instrument body in a state where the display unit is held by the second locking portion. An indicator lamp characterized in that it is dimensioned so as to generate.   The said 2nd latching | locking part restrict | limits the movement in the front-back direction of the said display unit in the state in which the said display unit is hold | maintained at the said instrument main body by the said 1st latching | locking part. The indicator lamp according to 1.   The second locking portion also serves as a means for guiding the display unit when the display unit is moved downward by the predetermined weight from the position where the display unit is held by the first locking portion. The indicator lamp according to claim 1 or 2, characterized in that   The fixed amount is set to a size such that the brightness of the display panel becomes equal to or higher than a predetermined reference value by light from the light source in a state where the display unit is held by the second locking portion. The indicator lamp as described in any one of Claims 1-3 characterized by the above-mentioned.

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