JP2010277734A - Indication lamp - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To alleviate a load added on a terminal section, at attachment of a light source holder to an its body case. <P>SOLUTION: The indication lamp is provided with a light source holder attached to a front face of the body case formed into a box shape with an opening at the front face. The light source holder contains a substrate mounting a light source. The substrate is provided with end pieces, each having a terminal pattern formed as a terminal part. The body case has a socket 50 fixed for each end piece of the substrate to be connected with. Each socket 50 is provided with a contact 60, and a housing 51 housing the contact 60. The contact 60 is provided with contact parts 61, made of a plate spring and for each end piece of the substrate to be in contact with, and an elastic part 62 with a rear-end part fixed to a rotating shaft 53d fitted to the housing 51 and a front end coupled with each contact part 61. The contact 60 moves toward the thickness direction of the substrate due to the elastic parts 62, when the end piece of the substrate comes in contact to reduce the load applied to the substrate. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an indicator lamp that attaches to a front surface of a box-shaped main body case a light source holder that holds a light source and a display panel that is illuminated by light from the light source.

  2. Description of the Related Art Conventionally, there has been provided an indicator lamp for attaching a light source unit having a light source and a display unit having a display panel made of a translucent material to a main body having a box-shaped main body case. The main body case has an opening on the front surface, and the light source unit and the display unit are attached to the opening surface. This type of indicator lamp has a use in which a guide sign is written on a display panel and a main body case is attached to a ceiling or a wall and used as a guide lamp.

  14 and 15, the main body 1 has a configuration in which a lighting device 12 that turns on a light source 31 is housed in a main body case 10. A connector 42 is connected to the lighting device 12 via a lead wire 41.

  The display unit 2 has a configuration in which a light guide plate (not shown) made of a translucent material is disposed on the rear surface side of the display panel 21. The light guide plate and the display panel 21 are supported by a panel case 23 that covers an end surface excluding an incident surface that is an upper end surface of the light guide plate. The display unit 2 is attached to the front surface of the main body case 10 so as to close other than the upper portion of the opening surface of the main body case 10.

  In the light guide plate, light incident on the incident surface is guided by repeating internal reflection on the output surface and the rear surface, which are front surfaces. In order to emit light from the emission surface, for example, a groove having a V-shaped cross section along the longitudinal direction of the incidence surface is provided on the rear surface. A part of the light reflected by the wall surface of the groove is incident on the exit surface at an incident angle smaller than the critical angle and exits from the exit surface.

  The light source unit 3 includes a light source holder 30 having a square front wall, an upper wall, and left and right side walls. The light source holder 30 includes a substrate 43 on which a light source 31 is mounted. Yes. A connector 44 electrically connected to the light source 31 is mounted on the substrate 43.

  The light source holder 30 is attached to the upper portion of the front surface of the main body case 10 after connecting the connector 42 and the connector 44. The light source 31 is turned on by the lighting device 12, and the light from the light source 31 enters the incident surface of the light guide plate.

  On the other hand, the basic configuration is the same as that of the guide light shown in FIGS. 14 and 15, but as shown in FIG. 16, a socket 50 ′ is provided instead of the connector 42, and a terminal portion 34 b ′ is provided instead of the connector 44. A guide light provided is provided (see, for example, Patent Document 1). The sockets 50 ′ are respectively fixed to the left and right end portions of the upper end portion of the main body case 10, and the terminal portions 34 b ′ are provided so as to protrude rearward at the left and right end portions in the longitudinal direction of the light source holder 30.

  In addition, a pair of left and right guide protrusions 30a, one of which is in sliding contact with one inner surface of each of the left and right side walls of the main body case 10, are provided at both ends in the longitudinal direction of the light source holder 30 so as to protrude rearward. ing. When the light source holder 30 is attached to the main body case 10, one of the terminal portions 34b 'comes into contact with one of the sockets 50'.

JP 2002-23657 A

  The guide lights shown in FIGS. 14 and 15 have a problem that a human external force is applied to the connector 42 when the connector 42 is connected to the connector 44. In addition, two operations, that is, an operation of connecting the connector 42 to the connector 44 and an operation of attaching the light source holder 30 to the main body case 10 are necessary. Further, when the light source holder 30 is attached to the main body case 10, the lead wire 41 may be sandwiched between the light source holder 30 and the main body case 10.

  In the guide light described in Patent Document 1 shown in FIG. 16, when the light source holder 30 is attached to the main body case 10, the terminal portion 34 b ′ comes into contact with the socket 50 ′. Further, when the light source holder 30 is attached to the main body case 10, the lead wire 41 (see FIG. 14) is not sandwiched between the light source holder 30 and the main body case 10.

  However, when attaching the light source holder 30 to the main body case 10, if the light source holder 30 is inclined with respect to the main body case 10 so that one end portion in the longitudinal direction of the light source holder 30 is in front of or behind the other end portion, A load is applied to the terminal portion 34b ′. That is, even when the technique described in Patent Document 1 is used, there still remains a problem that a load is applied to the electrical connection member (connector 44, terminal portion 34b ').

  This invention is made | formed in view of the said reason, The objective is to provide the indicator lamp which can reduce the load added to a terminal part.

  The invention of claim 1 is formed in a box shape and has a front surface opened, a display panel made of a translucent material and attached to the front surface of the main body case, and a plate shape made of the translucent material. A light guide plate that is disposed on the rear surface side of the display panel and emits light incident on an incident surface, which is one end surface along the thickness direction, from the output surface on the display panel side, and is formed in a long shape in one direction and holds a light source The light source holder that is attached to the front surface of the main body case from the front and extends along the incident surface of the light guide plate, the terminal portion that is provided so as to protrude rearward from the light source holder, and the light source holder are attached to the main body case. And a connecting member to which the terminal portion is connected, and the main body case holds the connecting member so as to be movable in the longitudinal direction of the light source holder.

  According to a second aspect of the present invention, in the first aspect of the present invention, the connecting member includes a contact made of a leaf spring, and the contact includes an abutting portion with which the terminal portion abuts and one end portion coupled to the abutting portion. And an elastic portion having elasticity in the longitudinal direction of the incident surface of the light guide plate, and a gap is provided between the light source holder and the wall of the member housing the connection member. It is characterized by.

  According to a third aspect of the present invention, in the first aspect of the invention, the connection member includes a contact with which the terminal portion abuts and a housing that holds the contact, and the main body case abuts against an outer surface of the housing. A plurality of holding portions for restricting the movement of the housing are provided, and the holding portion for restricting the movement of the housing in the longitudinal direction of the incident surface of the light guide plate is provided such that the housing is movable in the longitudinal direction. To do.

  In the present invention, since the connecting member connected to the terminal portion provided in the light source holder is held in the main body case so as to be movable in the longitudinal direction of the incident surface of the light guide plate, the light source holder is attached to the main body case. It is said that the load generated in the terminal portion when the light source holder is tilted with respect to the main body case in such a manner that one end portion in the longitudinal direction of the light source holder is in front of or behind the other end portion can be reduced by moving the connecting member. There are advantages.

FIG. 3 is a plan view of the inside of the socket according to the first embodiment. It is an exploded perspective view same as the above. It is a perspective view of the state which removed the light source unit in the same as the above. It is a perspective view of a board | substrate and a socket same as the above. It is a perspective view of a connector same as the above. It is a perspective view of a housing same as the above. It is a perspective view which shows the principal part of a main body case same as the above. It is a top view which shows another form of a housing same as the above. FIG. 10 is an operation explanatory diagram illustrating the operation of the socket according to the second embodiment. It is a figure which shows Embodiment 3, and is a perspective view of the state which removed the light source unit. It is a perspective view of a light source unit same as the above. It is a perspective view of a terminal part and a socket same as the above. It is operation | movement explanatory drawing explaining operation | movement of a socket same as the above. It is a disassembled perspective view which shows a prior art example. It is a disassembled perspective view of a light source unit same as the above. It is a disassembled perspective view which shows another prior art example.

  As shown in FIG. 2, the present embodiment includes a main body 1 having a main body case 10 that is formed in a rectangular box shape and has an open front surface. The light source unit 3 includes a light source 31 and is illuminated by light from the light source 31. The display unit 2 having the display panel 21 is configured to close the opening of the main body case 10.

  The main body case 10 is a molded product formed using a synthetic resin. For example, the main body case 10 is attached to the ceiling such that the upper surface in the drawing is in contact with the ceiling surface, or is attached to the wall in such a manner that the rear surface is in contact with the wall surface. . Below, the upper and lower sides and right and left in the state which attached main body case 10 to the ceiling and the wall are demonstrated as upper and lower sides and right and left.

  The main body case 10 is a metal including a rectangular plate-shaped base portion 11a whose rear surface abuts against the front surface of the bottom of the main body case 10, and four holding pieces 11b extending forward from the four ends of the base portion 11a. A mounting plate 11 made of metal is accommodated. The mounting plate 11 is arranged such that one of the four holding pieces 11b abuts on the inner side surfaces of the four side walls of the main body case 10, respectively. For example, the mounting plate 11 is fixed to the main body case 10 by providing engaging portions on the holding pieces 11b and the side walls of the main body case 10 and engaging the engaging portions with each other.

  The mounting plate 11 includes a lighting device 12 that turns on the light source 31, a secondary battery 13 that is an emergency power source for turning on the light source 31 in the event of a power failure, and a power supply line (not shown) drawn from the ceiling or construction wall. The terminal block 14 to be connected to the mounting plate 11 is attached using a mounting screw that engages with the mounting plate 11.

  Feeder wire openings 11 c and 10 a for drawing the feeder wires into the main body case 10 are provided through the base portion 11 a and the upper holding piece 11 b of the mounting plate 11 and the bottom and upper walls of the main body case 10, respectively. The The power supply line is electrically connected to the lighting device 12 and the secondary battery 13 in the terminal block 14.

  Locking pieces 10b for locking the display unit 2 project from the front end portions of the inner side surfaces of the left and right side walls of the main body case 10, respectively. As shown in FIG. 3, a guide groove 10c having a rectangular cross section reaching the front surface of the upper wall is recessed in the front-rear direction. A fitting hole 10d is formed in the bottom surface of the guide groove 10c. That is, the fitting hole 10 d is provided through the upper wall of the main body case 10.

  Further, a socket 50 electrically connected to the lighting device 12 is attached to the main body case 10. The socket 50 and the configuration for attaching the socket 50 to the main body case 10 will be described later.

  As shown in FIG. 2, the display unit 2 has a configuration in which a light guide plate 22 is disposed on the rear surface side of the display panel 21. The display panel 21 is a molded product formed using a light-transmitting synthetic resin material, and characters and figures are written on the display panel 21.

  The light guide plate 22 is a molded product formed using a translucent synthetic resin material. In the light guide plate 22, light incident on the incident surface 22 a that is the upper end surface is repeatedly guided by internal reflection between an output surface (not shown) that is the front surface and a light reflecting surface (not shown) that is the rear surface. Lighted. In order to emit light from the exit surface, a groove (not shown) having a V-shaped cross section along the longitudinal direction (left-right direction) of the entrance surface 22a is formed on the light reflecting surface. A part of the light reflected by the wall surface of the groove is incident on the exit surface at an incident angle smaller than the critical angle and exits from the exit surface. Moreover, you may form the printing pattern which diffuses and reflects light on a light reflection surface using dot printing instead of a groove | channel. A part of the light diffusely reflected by the print pattern enters the exit surface at an incident angle smaller than the critical angle and exits from the exit surface. On the light reflection surface side of the light guide plate 22, a reflection sheet that reflects light leaking from the light reflection surface is disposed.

  The display panel 21 and the light guide plate 22 are supported by a panel case 23 that covers the left and right end surfaces, the lower end surface, and the rear surface of the light guide plate 22. A locking piece 23 b that locks the front surface of the display panel 21 protrudes from the front end portion of the inner side surface of the left and right side walls of the panel case 23. The display panel 21 and the light guide plate 22 are inserted into the panel case 23 from above.

  Further, on both the left and right portions of the panel case 23, engagement pieces 23c whose front surfaces are locked to the rear surface of the engagement pieces 10a provided on the main body case 10 are provided. The panel case 23 is attached to the front surface of the main body case 10 so as to close all but the upper portion of the opening of the main body case 10.

  The light source unit 3 includes a rectangular front wall, left and right side walls protruding rearward from both longitudinal end portions (left and right end portions) of the rear surface of the front wall, and an upper portion protruding rearward from the upper end portion of the rear surface of the front wall. A light source holder 30 having a wall is provided. The light source holder 30 is a molded product molded using a synthetic resin, and the guide protrusions 30a inserted from the front into the guide grooves 10c provided in the main body case 10 protrude from both longitudinal ends of the rear surface of the upper wall. Established.

  The guide protrusion 30a is formed in a plate shape whose thickness direction is the vertical direction, and is integrally formed with the light source holder 30 that is a synthetic resin molded product, and has flexibility in the vertical direction. The width dimension of the guide protrusion 30a (the dimension in the left-right direction) is set to be substantially the same as the width dimension (the dimension in the left-right direction) of the guide groove 10c having a rectangular cross section, and one of the left and right side surfaces is the left and right of the guide groove 10c. Respectively abut one of the peripheral walls. A fitting convex portion 30b that fits into a fitting hole 10c provided in the main body case 10 is projected upward from the tip portion of the guide projection 30a.

  The light source holder 30 is disposed on the upper side of the display unit 2 and a downward load is supported by the display unit 2. Further, one of the left and right side surfaces of the guide protrusion 30a abuts on one of the left and right peripheral walls of the guide groove 10c, so that the movement in the left-right direction is restricted, and the fitting protrusion 30b is fitted into the fitting hole 10d. Is restricted from moving forward.

  The light source holder 30 includes a front wall and a rear wall that are opposed to each other in the front-rear direction and formed in a shape that is long in the longitudinal direction of the light source holder 30, and an upper end portion of the front wall and an upper end of the rear wall over the entire length in the left-right direction. A storage case 32 having an upper wall that joins the parts is received. For example, an engagement protrusion that engages with the storage case 32 is provided on the light source holder 30 so as to protrude from the inner surface of the upper wall or the front wall.

  A substrate 34 is attached to both ends in the longitudinal direction of the storage case 32 by an attachment member 35 and a holding member 36, respectively. Each substrate 34 is arranged such that the thickness direction is the longitudinal direction of the light source holder 30, and the light source 31 is mounted thereon. For the light source 31, for example, a light emitting diode is used. Each substrate 34 includes an end piece 34a protruding rearward. As the substrate 34, a printed wiring board is used, and as shown in FIG. 4, a pair of upper and lower terminal patterns 34b are formed by performing gold plating on the conductor pattern provided on the end piece 34a. Each terminal pattern 34b is electrically connected to the light source 31 and constitutes a terminal portion.

  The attachment member 35 shown in FIG. 2 is provided with, for example, an engagement piece in which an engagement claw that engages with the storage case 32 is provided at the tip, and the storage case 32 is sandwiched between the storage case 32 and the substrate 34. To be attached.

  The storage case 32 stores a pair of light guide members 33. On the inner side surface of the front wall and the inner side surface of the rear wall of the storage case 32, for example, an engaging protrusion that engages with the light guide member 33 is projected. The storage case 32 is formed of a metal material having a good reflectivity. Alternatively, a reflection film is formed on the inner side surfaces of the front and rear walls and the upper wall while being formed of a synthetic resin material.

  Each light guide member 33 is formed in a bar shape or a line shape that is long in the longitudinal direction (left-right direction) of the light source holder 30. Specifically, it is formed in a tapered shape in which the vertical width gradually decreases from one end portion in the longitudinal direction toward the other end portion. Each light guide member 33 is arranged in such a manner that the tapered tips are abutted with each other, and the light guide surface 33b which is one surface along the longitudinal direction is along the incident surface 22a of the light guide plate 22 and light which is one surface in the longitudinal direction. The introduction surface 33 a faces the light source 31.

  The light from the light source 31 enters the light introduction surface 33a of the light guide member 33, and is repeatedly guided by internal reflection between the light guide surface 33b and the light reflection surface 33c that is the surface opposite to the light guide plate 22. Lighted. In the light reflection surface 33c, a groove having a V-shaped cross section is formed in the front-rear direction in the same manner as the light guide plate 22 in order to emit light from the light guide surface 33b. Further, instead of the grooves, as in the case of the light guide plate 22, a print pattern for diffusing and reflecting light may be formed on the light reflecting surface using dot printing.

  Between the light guide surface 33b of the light guide member 33 and the incident surface 22a of the light guide plate 22, a light leakage preventing member 38 formed in a plate shape with a light-transmitting synthetic resin material is disposed. The light leakage preventing member 38 has a prism portion (not shown) that changes the light emitted from the light guide surface 33b of the light guide member 33 so as to enter the incident surface 22a in a direction that does not enter the light incident surface 22a of the light guide plate 22. Is formed.

  A light diffusion film 37 is disposed on the surface of the light leakage prevention member 38 on the light guide member 33 side. When the diffused light is incident on the incident surface 22 a of the light guide plate 22, the surface luminance in the left-right direction of the display panel 21 can be made uniform.

  Next, the socket 50 and the configuration of the main body case 10 for holding the socket 50 will be described. The socket 50 is a connection member for electrically connecting the light source 31 and the lighting device 12, and as shown in FIG. 4, a contact 60 formed using a plate-like metal material having a spring property, And a housing 51 that accommodates the contact 60.

  As shown in FIG. 5, the contact 60 is disposed between a pair of elastic portions 62 facing each other in the left-right direction and the two elastic portions 62 facing each other in the left-right direction, and the front end is coupled to the front end of the elastic portion 62. A pair of contact portions 61. The pair of elastic portions 62 are coupled at the upper ends of the rear end portions by a coupling portion 64. A connection piece 63 is coupled to the rear end of one elastic portion 62. The connecting piece 64 is connected to the other end of a lead wire 45 (see FIG. 1) whose one end is connected to the lighting device 12 (see FIG. 2).

  The housing 51 is formed in a rectangular tube shape that is long in the front-rear direction. An inner wall 53 that divides the internal space of the housing 51 in the vertical direction is coupled to the side walls 52 that are the left and right walls of the housing 51. As shown in FIGS. 1 and 6, one end in the left-right direction of the upper and lower walls 54, which is the upper and lower walls of the housing 51, is coupled to the upper end or lower end of one side wall 52 via a thin hinge 55, respectively. It can be opened and closed freely. Engagement holes 52 a are respectively penetrated in the upper and lower end portions of the other side wall 52. On the other hand, on one surface in the thickness direction of each of the upper and lower walls 54, an engaging convex portion 54a that fits into the engaging hole 52a is projected. Each upper and lower wall 54 is closed after the contact 60 is disposed in the housing 51. In addition, at both upper and lower end portions of the side wall 52 on which the engagement hole 52 a is provided, a drawing groove 52 b for drawing the lead wire 45 into the housing 51 is provided.

  Cutout grooves 53 a into which the end pieces 34 a of the substrate 34 are inserted are provided at both front and rear ends of the inner wall 53 of the housing 51. The contacts 60 are respectively arranged on both upper and lower sides of the middle wall 53 so that the pair of contact portions 61 are above or below the notch groove 53a.

  A rib 53b provided with a slit 53c into which the coupling piece 64 of the contact 60 is inserted, and a rotating shaft 53d sandwiched between the rear portions of the two elastic portions 62 of the contact 60, on both front and rear sides of the middle wall 53 Are projected. As described above, since the rear ends of the pair of elastic members 62 are coupled by the coupling portion 64, the rear ends of the elastic portion 62 are fixed by the rotating shaft 53d.

  Accordingly, the elastic portion 62 can rotate around the rotation shaft 53d, and the front end of the elastic portion 62 can be moved in the left-right direction. As a result, the contact portion 61 coupled to the front end of the elastic portion 62 can be moved in the left-right direction (that is, the substrate 34). (Thickness direction). The dimension between the inner surfaces of the left and right side walls 52 of the housing 51 is set to be larger than the maximum dimension of the contact 60 in the left and right direction so that the contact portion can move in the left and right direction. Is provided with a gap.

  At one end portion in the left-right direction (the end portion to which the hinge 55 is not coupled) of both ends in the front-rear direction of the upper and lower surfaces of the housing 51, there are regulating protrusions 54b for attaching the housing 51 to the main body case 10. Each projectes. The restricting convex portion 54b is formed in a right-angled triangular cross-section in which the projecting dimension increases from the end side where the hinge 55 is coupled to the end side where the restricting convex portion 54b is provided, and the side surface is the side surface of the upper and lower walls 54. Become the same.

  In addition, a pair of front and rear restricting pieces 54 c are respectively provided on the upper and lower surfaces of the housing 51. The front regulation piece 54c is provided behind the front regulation projection 54b, and the rear regulation piece 54c is provided in front of the rear regulation projection 54b. The restriction convex portion 54 b is formed in a trapezoidal shape having a tip surface substantially parallel to the upper surface of the housing 51.

  The socket 50 is disposed at a position where the end piece 34 a of the substrate 34 is inserted between the pair of contact portions 61 of the contact 60 when the light source holder 30 is attached to the main body case 10. That is, the sockets 50 are respectively disposed at the left and right end portions of the upper end portion of the main body case 10.

  As shown in FIG. 7, a pair of front and rear support pieces 81 project from the upper portions of the inner side surfaces of the left and right side walls of the main body case 10. From the lower end part of each support piece 81, the support convex part 81a protrudes in the direction which mutually approaches. That is, a pair of front and rear steps is formed by the support piece 81 and the support convex portion 81a, and the housing 51 has a rear surface of the rear restriction piece 54c in which the front surface of the front restriction piece 54c contacts the rear surface of the front support piece 81. Is fitted into the step so as to contact the front surface of the rear support piece 81, and movement in the front-rear direction is restricted.

  In addition, a holding convex portion 81 b is projected upward from the tip portion of each support piece 81. Further, a pair of front and rear holding projections 82 project from the left and right ends of the inner side surface of the upper wall of the main body case 10 so as to face the holding projections 81 b provided on the support piece 81.

  The dimension between the upper surface of the support piece 81 and the inner surface of the upper wall of the main body case 10 is such that the tip of the restricting convex portion 54 b provided on the upper surface of the housing 51 and the tip of the restricting convex portion 54 b provided on the lower surface. It is set to approximately the same dimension as that between. That is, the upper surface of the support piece 81 abuts on the tip of the restricting convex portion 54 b provided on the lower surface of the housing 51, and the inner surface of the upper wall of the main body case 10 is the tip of the restricting convex portion 54 b provided on the upper surface of the housing 51. Abut. Therefore, the movement of the housing 51 in the vertical direction is restricted.

  The dimension between the inner side surface of the left and right side walls of the main body case 10 and the side surface on the inner side surface of the holding convex portion 81 b provided on the support piece 81 is the same as the dimension in the left and right direction of the upper and lower walls 54 of the housing 51. Set to approximately the same dimensions. As described above, since the side surface of the regulating piece 54c is formed flush with the side surfaces of the upper and lower walls 54, the inner side surface of the side wall of the main body case 10 contacts the side wall 52 of the housing 51, and the holding convex portion 81b is the regulating piece. 54c. The dimension between the inner side surface of the left and right side walls of the body case 10 and the side surface on the inner side surface of the holding projection 82 provided on the upper wall of the main body case 10 is set in the horizontal direction of the upper and lower walls 54 of the housing 51. The dimensions are set to be approximately the same as the dimensions. Therefore, the inner side surface of the side wall of the main body case 10 contacts the side wall 52 of the housing 51, and the holding projection 82 contacts the restriction piece 54c. The housing 51 is restricted from moving in the left-right direction by the holding projection 81b and the holding projection 82.

  As described above, the housing 51 is fixed to the main body case 10 by being restricted from moving back and forth, left and right, and up and down.

  In addition, the holding projection 82 is formed in a triangular shape having a right-angled cross section so that the projecting dimension increases from the central portion in the left-right direction of the main body case 10 toward the left and right side walls of the main body case 10. Further, the holding convex portion 81 b provided at the distal end portion of the support piece 81 is formed such that the protruding dimension increases from the center in the left-right direction of the main body case 10 toward the left and right side walls of the main body case 10. In the housing 51, the restricting protrusion 54 b provided on the upper surface is in contact with the holding protrusion 82 provided on the upper wall of the main body case 10, and the restricting protrusion 54 b provided on the lower surface is provided on the support piece 81. The main body case 10 is brought close to the support piece 81 from the central portion side in the left-right direction so as to come into contact with the portion 81b. As described above, the restricting convex portion 54b provided in the housing 51 is formed in a triangular cross section, so that the restricting projection 82 and the holding convex portion 81a are in sliding contact with the restricting convex portion 54b. Here, the support piece 81 is formed integrally with the main body case 10 which is a synthetic resin molded product, and has flexibility. Therefore, the support piece 81 is bent, so that the housing 51 can be fitted between the support piece 81 and the upper wall of the main body case 10.

  By the way, as described above, in the housing 51, the restricting convex portion 54b and the restricting piece 54c are provided on the front portion and the rear portion of the housing 51, respectively. Therefore, it can be attached to both the left and right parts of the main body case 10 by reversing the front and rear. Further, the notch groove 53a, the rib 53b, and the rotating shaft 53d are respectively formed on both front and rear portions of the middle wall 53, and the contact 60 can be disposed on either the front portion or the rear portion. Therefore, the socket 50 attached to the left part of the main body case 10 and the socket 50 attached to the right part of the main body case 10 can be manufactured with one type of housing 51 and the contact 60.

  Next, how to assemble this embodiment will be described. The display unit 2 is disposed on the opening surface of the main body case 10 so that the engagement protrusions 23 a provided on the panel case 23 and the engagement pieces 10 b provided on the main body case 10 do not overlap in the front-rear direction, and then the main body case 10. The engaging piece 10b and the engaging piece 23a of the panel case 23 are slid downward so as to overlap each other. The front surface of the engagement piece 23 a is locked to the rear surface of the engagement piece 10 b, and the display unit 2 is attached to the front surface of the main body case 10.

  The light source unit 3 is brought closer to the upper part of the front surface of the main body case 10 from the front, and the guide protrusion 51 is inserted into the guide groove 53. As described above, one of the left and right side surfaces of the guide protrusion 51 abuts on one of the left and right peripheral walls of the guide groove 53, and the movement of the light source holder 30 in the left-right direction is restricted, so that the end piece 34 a of the substrate 34 contacts the contact 60. It is guided to the position inserted between the pair of contact portions 61.

  Further, as described above, the fitting convex portion 30b is fitted into the fitting hole 10d to restrict the forward movement of the light source holder 30, and the downward load of the light source holder 30 is supported by the display unit 2, and the light source holder 30 is attached to the body case 10.

  When removing the light source holder 30 from the main body case 10 for replacement or maintenance of the light source 31, the front portion of the light source holder 30 is shifted upward to remove the fitting convex portion 52 from the fitting hole 54, and then the light source holder 30 is removed. Pull forward. When the main body case 10 is attached to the ceiling, the upper and lower portions of the light source holder 30 are arranged so that the upper surface of the light source holder 30 is lower than the upper surface of the main body case 10 so that the light source holder 30 can be shifted upward. The dimensions are set.

  When the light source holder 30 is attached to or detached from the main body case 10, if the light source holder 30 is tilted with respect to the main body case 10 so that one of the left and right ends of the light source holder 30 is in front of or behind the other, the substrate 34 is moved in the front-rear direction. Thus, the contact 60 is inserted into and removed from the contact 60 in a state tilted in the left-right direction. In the present embodiment, as described above, the contact portion 61 of the contact 60 can move in the left-right direction, so that the end piece 34a of the substrate 34, which is a terminal portion when the light source holder 30 is attached to and detached from the main body case 10, is provided. The applied load can be reduced.

Incidentally, as shown in FIG. 8, a pair of guide convex portions 52 c facing each other in the left-right direction may be provided on the front end face of each side wall 52 of the housing 51. The mutually opposing inner surfaces of the pair of guide convex portions 52c are formed as inclined surfaces that are inclined so that the width dimension in the left-right direction of the guide convex portions 52c gradually decreases toward the front. The end piece 34a of the substrate 34 is guided by the contact portion 61 of the contact 60 by slidingly contacting the inner side surface of the guide convex portion 52c. The guide protrusions 52 c are also provided on the rear end surfaces of the left and right side walls 52 of the housing 51.
(Embodiment 2)
In the first embodiment, the socket 50 is fixed to the main body case 10 (see FIG. 2), and the contact 60 accommodated in the housing 51 is illustrated as being movable within the housing 51 (see FIG. 1). In the embodiment, an example in which the contact 60 is fixed in the housing 51 and the housing 51 is movable with respect to the main body case 10 will be described.

  In the present embodiment, as shown in FIG. 9, the dimension between the inner side surface of the left and right side walls of the main body case 10 and the side surface on the inner side surface of the holding convex portion 81 b provided on the support piece 81 is the housing 51. The upper and lower walls 54 are set to be larger than the horizontal dimension. Further, the dimension between the inner side surface of the left and right side walls of the main body case 10 and the side surface on the inner side surface of the holding projection 82 provided on the upper wall of the main body case 10 is the horizontal direction of the upper and lower walls 54 of the housing 51. It is set larger than the dimension. The dimension between the tip of the holding projection 81 b provided on the support piece 81 and the tip of the holding projection 82 that faces the holding projection 81 b is the same as that of the regulation projection 54 b provided on each of the upper and lower surfaces of the housing 51. It is set smaller than the dimension between the tips. Accordingly, the housing 51 can move in the left-right direction and does not fall off from the main body case 10.

  Further, the dimension between the upper surface of the support piece 81 and the inner side surface of the upper wall of the main body case 10 is set to be larger than the dimension between the tips of the restricting convex portions 54 b provided on the upper and lower surfaces of the housing 51. Is movable up and down. In addition, the vertical dimension between the upper surface of the support piece 81 and the upper surface of the support protrusion 81a is set to be larger than the movable distance of the housing 51 in the vertical direction. Therefore, even if the housing 51 moves in the vertical direction, the housing 51 does not deviate from the above-described step and does not fall off from the main body case 10.

  As described above, the housing 51 is supported by the main body case 10 and can move up and down and left and right as indicated by arrows in the figure. Therefore, when the light source holder 30 is attached to and detached from the main body case 10, it is possible to reduce a load applied to the end piece 34 a of the substrate 34 that is a terminal portion.

Other configurations are the same as those of the first embodiment.
(Embodiment 3)
In the second embodiment, as illustrated in FIG. 2, the example in which the light source unit 3 and the main body 1 are electrically connected at both ends in the longitudinal direction of the light source holder 30 has been described. However, in the present embodiment, FIGS. As shown in FIG. 4, an example in which the electrical connection is performed at the center in the longitudinal direction of the light source holder 30 will be described.

  In this embodiment, instead of forming the end pieces 34a (see FIG. 4) as terminal portions on the substrate 34, a pair of upper and lower terminal portions 39a protruding rearward are attached to the central portion in the longitudinal direction of the light source holder 30. The case 39 is disposed. On the inner surface of the front wall or the upper wall of the light source holder 30, for example, an engagement piece that engages with the case 39 is projected.

  The terminal portion 39 a is formed in a plate shape whose thickness direction is the longitudinal direction of the light source holder 30, and is electrically connected to the light source 31 (see FIG. 4) via the lead wire 46.

  On the other hand, the main body 1 includes a socket 70 shown in FIG. 12 instead of the socket 50 (see FIG. 2). The socket 70 includes a contact 60 and a housing 71 that accommodates the contact 60. The housing 71 is formed in a rectangular tube shape, and the internal space is vertically divided by the middle wall 53 ′. Each contact 60 is disposed on both upper and lower sides of the middle wall 53 ′.

  As shown in FIG. 13, a pair of support pieces 83 that protrude from each other in the left-right direction protrude from the center portion in the left-right direction of the inner surface of the upper wall of the main body case 10. Holding protrusions 84 project from the tips of the support pieces 83 so as to approach each other. The dimension between the inner side surfaces of each support piece 83 facing each other is formed larger than the dimension in the left-right direction of the case 39, and the housing 71 has play in the left-right direction. Moreover, the dimension between the inner surface of the main body case 10 and the upper surface of the holding projection 84 is formed larger than the vertical dimension of the housing 71, and the housing 71 has play in the left-right direction. That is, the socket 70 can move back and forth and left and right as shown by the arrows in the figure.

  Other configurations are the same as those of the second embodiment.

DESCRIPTION OF SYMBOLS 10 Main body case 21 Display panel 22 Light guide plate 22a Incident surface 30 Light source holder 31 Light source 34a End piece (terminal part)
50 Socket (connection member)
60 contacts 61 abutting portions 62 elastic portions 70 sockets 71 housings 81 support pieces (holding portions)
81a Support convex part (holding part)
82 Holding convex part (holding part)
83 Support piece (holding part)
84 Holding convex part (holding part)

Claims (3)

  A box-shaped main body case with an open front, a display panel made of a translucent material and attached to the front of the main body case, and a plate made of translucent material, placed on the rear side of the display panel A light guide plate that emits light incident on an incident surface, which is one end surface along the thickness direction, and a light guide plate that is formed in a long shape in one direction and holds a light source. A light source holder that is attached to the front surface along the incident surface of the light guide plate, a terminal portion that protrudes backward from the light source holder, and a connection that connects the terminal portion when the light source holder is attached to the main body case And the main body case holds the connecting member so as to be movable at least in the longitudinal direction of the light source holder.   The connection member includes a contact made of a leaf spring. The contact includes a contact portion with which a terminal portion abuts, a first end coupled to the abutment portion, and the other end fixed at a fixed position, and the contact surface of the incident surface of the light guide plate. The display according to claim 1, further comprising an elastic part having elasticity in a longitudinal direction, and a gap provided between the light source holder and a wall of a member that accommodates the connection member in the longitudinal direction of the light source holder. light.   The connection member includes a contact with which the terminal portion abuts, and a housing that holds the contact, and the main body case includes a plurality of holding portions that regulate movement of the housing by abutting against the outer surface of the housing, The indicator lamp according to claim 1, wherein the holding portion that restricts the movement of the housing in the longitudinal direction of the incident surface of the light guide plate is provided so that the housing can move in the longitudinal direction.

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