JP5491780B2 - Indicator light - Google Patents

Description

  The present invention provides a display in which a light source unit including a light source and a display unit including a display panel illuminated by light from the light source are attached to a main body unit including a main body case that houses a lighting device that turns on the light source. It is about a light.

  Conventionally, there has been provided an indicator lamp in which a light source unit having a light source and a display unit having a display panel illuminated by light from the light source are attached to a main body unit having a box-shaped main body case. The main body case has an opening over substantially the entire front surface. The light source unit and the display unit are respectively attached to the front surface of the main body case, and the entire surface of the opening of the main body case is closed by the light source unit and the display unit. This type of indicator lamp is used, for example, as a guide lamp with a guide sign on a display panel.

  The indicator lamp shown in FIG. 9 is a guide lamp, and has a configuration in which a lighting device 12 that turns on a light source (not shown) included in the light source unit 3 is housed in a main body case 10 (for example, Patent Literature 1). 1). A pair of sockets 40 ′, which are members for electrically connecting the lighting device 12 and the light source, are fixed at fixed positions in the main body case 10.

  The display unit 2 has a configuration in which a display panel 21 and a light guide plate (not shown) each formed in a rectangular shape are overlapped and attached to the panel case 23. The light guide plate is a plate-like member that guides light incident on an incident surface that is one end surface along the thickness direction and emits light substantially uniformly from the entire surface of the exit surface that faces the display panel 21. .

  The light source unit 3 includes a rectangular parallelepiped light source holder 30 whose back and bottom surfaces are open, and has a configuration in which a light source (not shown) is accommodated in the light source holder 30. A straight tube type cold cathode fluorescent lamp is used as the light source.

  At both end portions of the rear surface of the light source holder 30 in the longitudinal direction, terminal pieces 39a having a thickness direction in the longitudinal direction are respectively projected. One of the terminal pieces 39a is electrically connected to one of the two poles of the light source.

  When the light source unit 3 is pressed against the front surface of the main body case 10 so as to be placed on the upper surface of the display unit 2 in the drawing and is attached to the main body unit 1, the terminal piece 39a is inserted into the socket 40 ′, and the light source Is electrically connected to the lighting device 12.

JP 2002-23657 A

  By the way, when attaching the light source unit 3 to the main body unit 1, the light source unit 3 may be inclined with respect to the main body unit 1 so that one of both end portions in the longitudinal direction of the light source holder 30 is in front of the other. .

  In the indicator lamp (guide light) described in Patent Document 1, since the terminal pieces 39 a are provided at both ends in the longitudinal direction of the light source holder 30, if the light source holder 30 is inclined with respect to the main unit 1, the terminals There is a problem that the piece 39a cannot be inserted into the socket 40 ', and the light source cannot be electrically connected to the lighting device 12.

  Further, when the operator forcibly presses the light source unit 3 against the main unit 1 to correct the inclination of the light source holder 30, a large load is applied to the terminal piece 39a in the longitudinal direction of the light source holder 30 (that is, the thickness direction of the terminal piece 39a). In addition, there arises a problem that the terminal piece 39a is bent or broken.

  The present invention has been made in view of the above-described reasons, and the object thereof is to provide a light source and a main body included in the light source unit even when the light source holder is inclined with respect to the main body unit when the light source unit is attached to the main body unit. To provide an indicator lamp that can be electrically connected to a lighting device provided in the unit and that can reduce the possibility that the terminal piece is bent or damaged when the operator corrects the inclination of the light source unit. is there.

The invention according to claim 1 is incident on a main body unit including a main body case that is formed in a box shape having an opening on the front surface and accommodates a lighting device, and an incident surface that is formed in a plate shape and is one end surface along the front-rear direction. A light guide plate that emits light from the front exit surface, a display panel disposed on the front side of the light guide plate, a display unit that closes a part of the opening of the main body case, and a light source that is turned on by the lighting device are housed. A light source holder disposed on the incident surface side of the light guide plate so as to abut the display unit, and closing the remaining portion of the opening of the main body case. The main body unit is electrically connected to the lighting device. comprising a plurality of contacts mounted to the body case is connected, a light source holder is formed in a long elongated in the reference direction is a direction along the boundary of the display unit, the light source Uni The terminal has a terminal piece that protrudes from the rear surface of the light source holder and is inserted into the main body case to contact the contact, and the terminal piece is electrically connected to the light source and is in contact with one of the contacts. It provided with a, and being provided at one location of the put that criteria direction of the intermediate to the rear surface of the light source holder.

  According to a second aspect of the invention, in the first aspect of the invention, the main body unit includes a housing that accommodates the contact and is attached to the main body case, and is provided between the contact and the wall of the housing, and between the housing and the main body case. One of the gaps is provided with a gap that allows the contact to move at least in the reference direction with respect to the main body case.

  According to a third aspect of the present invention, in the second aspect of the present invention, the contact is made of a leaf spring, and has an elastic piece whose one end is supported by the housing so as to have elasticity in the reference direction, and the other end of the elastic piece. The contact piece is connected to the terminal piece, and the gap is provided between the elastic piece and the wall of the housing, and the contact is movable in the reference direction by the gap.

  According to a fourth aspect of the present invention, in the second aspect of the present invention, the main body case includes a mounting frame that is coupled to the inner side surface of the side wall and the housing is disposed inside, and the gap is between the housing and the mounting frame. The housing is movable in the reference direction by the amount of the gap.

  According to a fifth aspect of the present invention, in the invention according to any one of the second to fourth aspects, the light source unit is a box-shaped mounting base to which the terminal piece is attached and abutted in the front-rear direction with the housing. The housing includes one of a pair of fitting protrusions protruding forward and having a rear end portion of the mounting base inserted therebetween, at one of both ends in the reference direction, and the pair of fitting protrusions facing each other. Each surface to be in contact with the mounting base.

  In the first aspect of the present invention, the light source unit is provided at one place in the middle of the reference direction that is along the boundary line with the display unit on the rear surface of the light source holder. Even if the light source unit is tilted with respect to the main unit so that one of both ends in the reference direction of the light source holder is in front of the other, the terminal piece can contact the contact, and the operator can center the terminal piece. The inclination of the light source unit can be corrected without applying a large load to the terminal piece by moving one of the both end portions of the light source holder forward or backward, and as a result, the light source holder can be attached when the light source unit is attached to the main unit. Even if it is tilted with respect to the main unit, the light source and the lighting device can be electrically connected, and when the operator corrects the tilt of the light source unit, the terminal piece is bent or broken. Can be advantageously reduced risk of or.

  In the invention according to claim 2, since the gap is provided between one of the contact and the wall of the housing and between the housing and the main body case, the contact can move at least in the reference direction. When the operator corrects the inclination of the light source holder by moving, the load applied to the terminal piece is reduced, and as a result, the terminal piece may be bent or damaged when correcting the inclination of the light source unit. There is an advantage that it can be further reduced than 1.

  In the third aspect of the invention, the elastic piece coupled to the contact piece with which the terminal piece contacts has elasticity in the reference direction, and a gap is provided between the housing piece and the wall of the housing so that the elastic piece can move by the gap. The elastic piece moves to reduce the load applied to the terminal piece when the operator corrects the inclination of the light source holder, and when the light source unit is attached to the main unit, the contact moves in the left-right direction. However, when the light source unit is removed from the main unit, the contact returns to the fixed position due to the elasticity of the elastic piece. As a result, the contact is always in the fixed position before the light source unit is attached to the main unit. .

  In the invention according to claim 4, since the housing can be moved by the gap between the housing and the mounting frame, the contact is moved by the movement of the housing, and the terminal when the operator corrects the inclination of the light source holder. There is an advantage that a load applied to the piece is reduced and a configuration in which the contact is fixed to the housing can be adopted.

  According to the fifth aspect of the present invention, since the opposing surfaces of the pair of fitting protrusions are in contact with the mounting base, there is an advantage that the terminal piece and the contact in the reference direction can be positioned by the fitting protrusion.

It is a perspective view in the state where the light source unit of Embodiment 1 was removed. It is an exploded perspective view same as the above. It is a perspective view of the back side of a light source unit same as the above. It is a perspective view of the same mounting base and socket. It is a perspective view of a contact same as the above. It is sectional drawing of a socket same as the above. It is a front view which shows the principal part of a main body case. It is sectional drawing of the housing of Embodiment 3. It is a disassembled perspective view which shows a prior art example.

  Below, the example which used the indicator lamp of this invention for the guide light is demonstrated. In the present embodiment, as shown in FIG. 2, a light source including a main body unit 1 including a main body case 10 that has a thin box shape and has an opening over substantially the entire front surface that is one surface in the thickness direction, and a light source 31. The unit 3 and the display unit 2 including the display panel 21 illuminated by light from the light source 31 are configured. The display unit 2 and the light source unit 3 are covered with the opening of the main unit 1, and the entire surface of the opening is closed by the display unit 2 and the light source unit 3.

  The main body case 10 is a synthetic resin molded product and is attached to the ceiling with the upper surface in FIG. 2 in contact with the ceiling surface, or attached to the wall with the rear surface in contact with the wall surface. In the following description, the vertical direction in FIG. 2 is defined as the vertical direction, the upper left in FIG. 2 is defined as the left, and the lower right is defined as the right. However, these directions do not restrict the mounting direction of the guide light.

  The main unit 1 has a metal mounting plate 11 accommodated in the main body case 10. The attachment plate 11 is attached to the main body case 10 using, for example, screws. The mounting plate 11 includes a lighting device 12 that is fed from a commercial power source to turn on the light source 31, a secondary battery 13 that secures power for lighting the light source 31 in the event of a power failure of the commercial power source, and a feed line from the commercial power source ( A terminal block 14 for connecting the lighting device 12 and the secondary battery 13 to each other is attached. The lighting device 12, the secondary battery 13, and the terminal block 14 are attached to the attachment plate 11 using, for example, screws.

  The feeder is drawn into the main body case 10 through one of the through holes 10a provided in the upper wall and the rear wall of the main body case 10, and further introduced into the upper wall and the rear wall of the mounting plate 11. The main unit 1 is drawn through one of the holes 11a.

  A plurality (two in the illustrated example) of engaging pieces 10 b for attaching the display unit 2 to the main body case 10 project from the left and right side walls of the main body case 10. Each engagement piece 10b is vertically spaced on the inner surface of each side wall.

  A socket 40 electrically connected to the lighting device 12 is attached to the center of the upper end portion of the main body case 10 in the left-right direction. The socket 40 will be described later.

  Further, as shown in FIG. 1, guide grooves 10 c for attaching the light source unit 3 to the main unit 1 are formed on the left and right ends of the upper wall of the main body case 10. The guide groove 10c has a front surface and a lower surface that are open, and includes a pair of peripheral surfaces that face each other in the left-right direction, and an inner bottom surface (upper surface) that is orthogonal to each peripheral surface, and is formed in a front rectangular shape. . A fitting hole 10d is formed in the inner bottom surface of the guide groove 10c. The fitting hole 10 d penetrates the upper wall of the main body case 10.

  As shown in FIG. 2, the display unit 2 is configured such that a display panel 21 and a light guide plate 22 each formed in a rectangular plate shape are overlapped in front and back, and a peripheral portion of a laminate of the display panel 21 and the light guide plate 22 is placed on the panel. It has a configuration surrounded by a case 23. The panel case 23 is formed in a U-shape that is open upward so as to expose the incident surface that is the upper surface of the light guide plate 22. The display panel 21 is a molded product formed using a light-transmitting synthetic resin material, and characters and figures are written (guide lights are written on guide lights).

  The light guide plate 22 is formed using a transparent synthetic resin, and guides light introduced from an incident surface by repeating internal reflection between a light exit surface as a front surface and a light reflection surface as a rear surface. In addition, the light guide plate 22 has a function of uniformly emitting a light beam from the entire surface of the emission surface by causing some light to leak from the emission surface while light is guided. Therefore, the display panel 21 stacked on the light guide plate 22 can illuminate uniform luminance.

  Although the principle of the light guide plate 22 is well known and will not be described in detail, the light guide plate 22 is formed with a groove having a V-shaped cross section along the left-right direction on the light reflecting surface in order to emit light from the light emitting surface. A configuration in which light is reflected by the wall surface or a configuration in which a large number of dot patterns are printed on the light reflecting surface and light is diffusely reflected by the dot patterns is used. By adopting these configurations, a part of the light guided inside the light guide plate 22 is incident on 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 (not shown) that reflects light leaking from the light reflection surface is disposed.

  By the way, on the left and right side surfaces of the panel case 23, a plurality (two in the illustrated example) of mounting pieces 23a that overlap the front and rear with the engaging pieces 10b provided on the main body case 10 are projected.

  When attaching the display unit 2 to the main body case 10, the display unit 2 is overlaid on the front surface of the main body case 10 so that the attachment piece 23 a is positioned above the engaging piece 10 b of the main body case 10. The mounting piece 23a is overlapped on the rear side of the engaging piece 10b. The engagement piece 10b is provided slightly behind the opening surface of the main body case 10 so that the lower end of the display unit 2 is placed on the upper surface of the lower wall of the main body case 10 when the display unit 2 is dropped. Accordingly, the display unit 2 is attached to the main body unit 1 such that a downward load is supported by the main body unit 1 and a portion of the opening surface of the main body unit 1 other than the upper portion is closed.

  The light source unit 3 includes a light source holder 30 that is formed in a rectangular parallelepiped shape that is long in the left-right direction with the lower surface and the rear surface open. The light source holder 30 is a synthetic resin molded product, and guide protrusions 30a to be inserted into guide grooves 10c provided in the main body case 10 at the left and right ends of the rear surface of the upper wall, and a main body inserted into the main body case 10 A misalignment prevention protrusion 30c that abuts on the left and right side walls of the case 10 is provided to protrude.

  The guide projection 30a is formed in a plate shape whose thickness direction is the vertical direction, and a fitting projection 30b that fits into the fitting hole 10d provided in the guide groove 10c is projected from the tip. In addition, the width dimension (the dimension in the left-right direction) of the guide protrusion 30a is set to be approximately the same as the width dimension (the distance between the pair of peripheral surfaces in the left-right direction) of the guide groove 10c, and the guide protrusion 30a is formed in the guide groove 10c. When inserted, one of the side surfaces in the left-right direction of the guide protrusion 30a abuts on one of the peripheral surfaces in the left-right direction of the guide groove 10c. That is, when the guide protrusion 30a is inserted into the guide groove 10c, the movement of the light source holder 30 in the left-right direction is restricted.

  After the display unit 2 is attached to the main unit 1, the light source unit 3 is positioned so that the guide protrusion 30 a is inserted into the guide groove 10 c provided in the main body case 10, and is pressed against the front surface of the main unit 1 for display. It is placed on the upper surface of the unit 2. When the guide protrusion 30a is inserted into the guide groove 10c, the fitting protrusion 30b provided at the tip of the guide protrusion 30a slides on the inner bottom surface of the guide groove 10c, the guide protrusion 30a bends, and the fitting protrusion 30b becomes the guide groove. It fits in the fitting hole 10d opened on the inner bottom surface of 10c. The light source unit 3 is placed on the upper surface of the display unit 2 so that a downward load is supported by the display unit 2, and as described above, the guide protrusion 30 a is inserted into the guide groove 10 c, so that the horizontal movement is restricted. When the fitting protrusion 30b is fitted into the fitting hole 10d, the movement in the front-rear direction is restricted and the fitting unit 30 is attached to the main unit 1.

  Further, when the light source unit 3 is attached to the main unit 1, the misalignment prevention protrusion 30 c is inserted into the main body case 10 as a guide for the mounting position on the main body case 10, and the light source unit 3 is formed by the misalignment prevention protrusion 30 c. The workability when attaching to the main unit 1 is improved.

  The light source holder 30 includes a pair of left and right substrates 34 on which the above-described light sources 31 are mounted, a pair of left and right light guide members 33 that guide light emitted from each light source 31 to the incident surface of the light guide plate 22, and the substrate 34. And the storage case 32 which integrates the light guide member 33 is accommodated. As the light source 31, for example, a light emitting diode is used.

  The storage case 32 is formed in a box shape that is long in the longitudinal direction of the light source holder 30. Both the left and right side surfaces and the lower surface are opened, and the storage case 32 is fixed at a fixed position in the light source holder 30. Each board 34 has both left and right end portions of the storage case 32 using attachment members 35 respectively coupled to the left and right end portions of the storage case 32 and holding members 36 interposed between the substrate 34 and the attachment member 35. Fixed to each.

  The light guide member 33 is formed in a wedge shape with a transparent synthetic resin, and a light introduction surface 33a orthogonal to the left and right direction is provided at one end in the left and right direction, and the upper surface is a lower surface as the distance from the light introduction surface 33a is increased in the left and right direction It is an inclined surface inclined so as to approach the light derivation surface. Similar to the light reflection surface of the light guide plate 22, a groove having a V-shaped cross section or a diffuse reflective dot pattern is formed on the inclined surface.

  Each light guide member 33 is housed in both the left and right parts of the housing case 32 with the light introduction surface 33a facing the light source 31, and is fixed at a fixed position in the housing case 32, so that the light from the light source 31 is received. The light enters the light introduction surface 33a. The light guide member 33 guides the light introduced from the light introduction surface 33a and emits the light over the entire surface of the light extraction surface. The inner surface of the upper wall of the storage case 32 is preferably a reflective surface.

  By the way, in addition to the light source 31 and the light guide member 33 described above, the light source holder 30 guides the light diffusion sheet 37 disposed opposite to the light guide surface of the light guide member 33 and the light diffusion sheet 37 therebetween. A light leakage prevention member 38 formed of a transparent material disposed on the opposite side of the member 33 is accommodated. Light emitted from the light guide surface of the light guide member 33 is diffused by the light diffusion sheet 37 and emitted from the light source unit 3 through the light leakage prevention member 38. The light diffusion sheet 37 has a function of diffusing the light emitted from the light guide member 33 to make the light flux uniform in the left-right direction. The light leakage prevention member 38 has a function of limiting the light emission range so that the light passing through the light diffusion sheet 37 is emitted from the lower surface of the light leakage prevention member 38 without being diverged.

  Further, as shown in FIG. 3, the light source holder 30 accommodates a mounting base 39 to which a pair of upper and lower terminal pieces 39 a to be inserted into sockets 40 (see FIG. 2) attached to the main body case 10 are attached. The mounting base 39 is formed in a front rectangular box shape, and the storage case 32 so that the rear surface is flush with the rear surface of the upper wall of the light source holder 30 at the center in the longitudinal direction (left-right direction) of the light source holder 30. Are fixed in place so as to be sandwiched between the upper surface of the light source and the inner surface (lower surface) of the upper wall of the light source holder 30. That is, the terminal piece 39 a is provided at one place (center) in the middle of the reference direction (that is, the left-right direction) that is the direction along the boundary line with the display unit 2 on the rear surface of the light source holder 30.

  Each terminal piece 39a is made of a conductive plate-like metal material, and is attached to the mounting base so as to penetrate the rear wall of the mounting base 39 so that the thickness direction is the left-right direction. Since the mounting base 39 is attached to the main body case 10 so that the rear surface thereof is flush with the rear surface of the upper wall of the light source holder 30 as described above, the terminal piece 39a is located behind the rear surface of the upper wall of the light source holder 30. Protrusively.

  Each terminal piece 39 a is electrically connected to each light source 31 via a lead wire 61. The lead wire 61 has one end connected to the terminal piece 39 a and the other end soldered directly to the substrate 34. It is also possible to connect the lead wire 61 and the substrate 34 by mounting a substrate-side connector on the substrate 34 and connecting the lead wire-side connector connected to the substrate-side connector to the other end of the lead wire 61. A through hole (not shown) through which the lead wire 61 passes is provided in the peripheral wall of the mounting base 39.

  In the present embodiment, the terminal piece 39a is formed of a conductive metal material as described above, and the terminal piece 39a itself is used as an electrode. However, the present invention is not limited to this, and for example, a printed circuit board in which a pair of upper and lower electrodes is formed by a conductor pattern can be used as a terminal piece.

  As shown in FIG. 4, the socket 40 into which the terminal piece 39 a is inserted includes a pair of upper and lower contacts 50 made of leaf springs, and a housing 41 that houses the contacts 50.

  As shown in FIG. 5, the contact 50 includes a pair of left and right elastic pieces 52 facing each other in the thickness direction (left and right direction). The upper ends in the drawing of the rear end portions of the pair of elastic pieces 52 are coupled by a coupling piece 54. Between the pair of elastic pieces 52, a pair of contact pieces 51 facing each other in the left-right direction are arranged. The pair of contact pieces 51 have rear end portions close to each other, and the front end is coupled to the front end of one elastic piece 52. The terminal piece 39a is inserted and sandwiched between the rear ends of the pair of contact pieces 51.

  Further, from the rear end of one elastic piece 52, there is a connecting piece 55 coupled to a connecting piece 53 to which a lead wire 62 (see FIG. 6) for electrically connecting the lighting device 12 and the contact 50 is connected. It is extended. The connecting piece 55 extends from the rear end of one elastic piece 52 toward the other elastic piece 52 to the middle of the pair of elastic pieces 52, and the connecting piece 53 is coupled to the tip. The connection piece 53 is formed in a plate shape whose thickness direction is the left-right direction and a long shape in the front-rear direction, and the lead wire 62 is coupled to the rear end portion.

  On the other hand, as shown in FIG. 4, the housing 41 is formed in a front rectangular box shape, and has a pair of upper and lower insertion ports 41 a into which one of a pair of upper and lower terminal pieces 39 a provided on the light source holder 30 is respectively inserted. Opened on the front. That is, the housing 41 has a shape in which the internal space is vertically divided by the partition plate 42 that joins the left and right side walls at the center in the vertical direction, and the contacts 50 are respectively disposed on the upper and lower sides of the partition plate 42. In order to arrange the contact 50 in the housing 41, for example, the upper wall and the lower wall of the housing 41 are detachably formed. The peripheral wall of the housing 41 is provided with a through hole (not shown) for passing the lead wire 62.

  As shown in FIG. 6, ribs 42 b provided with slits 42 a into which the connection pieces 53 of the contacts 50 are inserted and a square columnar rotation shaft 42 c are respectively provided on the upper and lower surfaces of the partition plate 42. Projected. The rotating shaft 42 c is provided at the center in the left-right direction in front of the rib 42 b, and the size in the left-right direction is set slightly smaller than the size between the rear end portions of the elastic pieces 52 of the contact 50. Inserted between the ends. That is, when the contact 50 is disposed in the housing 41, the connecting piece 55 of the contact 50 is between the rib 42b and the rotating shaft 42c.

  The contact 50 is restricted from moving forward (leftward in the figure) when the connecting piece 55 comes into contact with the rear surface of the rotating shaft 42c, and rearward (right in the figure) when the connecting piece 55 comes into contact with the front surface of the rib 42b. ) Is restricted.

  Further, since the rear end portions of the pair of elastic pieces 52 are coupled by the coupling piece 54 and the rotating shaft 42c is inserted therebetween, the rear end portions of the elastic pieces 52 are supported by the rotating shaft 42c in the left-right direction. The Therefore, the elastic part 52 has elasticity in the left-right direction. Here, the dimension between the inner side surfaces of the side wall in the left and right direction of the housing 41 is set so that a gap is formed between the elastic piece 52 and the left and right side walls of the housing 41. Therefore, the elastic piece 52 can be bent by the gap, and the elastic deformation 52 is bent, so that the front portion of the elastic piece 52 and the contact piece 51 can move in the left-right direction. That is, the front part of the contact 50 (the front part of the elastic piece 52 and the contact piece 51) is displaced so as to rotate about the rotation shaft 43c.

  On the other hand, as shown in FIG. 7, a pair of left and right support pieces 71 with a socket 40 disposed between them are projected from the center portion in the left and right direction of the inner side surface of the upper wall of the main body case 10. The dimension of the support piece 71 in the front-rear direction is set to be smaller than the dimension of the housing 41 in the front-rear direction, and the rear ends of the left and right side surfaces of the housing 41 are exposed.

  Support protrusions 72 project from the front end portions (lower end portions in the drawing) of the support pieces 71 so as to approach each other, and the upper surface of the support protrusions 72 abuts the lower surface of the housing 41, thereby The downward load is supported by the support convex portion 72 and attached to the main body case 10. That is, an attachment frame for attaching the socket 40 to the main body case 10 is formed by the support piece 71 and the support convex portion 72.

  The distance L1 between the side surfaces facing each other in the pair of support pieces 71 is set to be the same as the dimension L2 in the left-right direction of the housing 41 or larger by the upper limit of the dimension error of the housing 41. Further, the distance L3 between the upper surface of the support convex portion 72 and the inner surface of the upper wall of the main body case 10 is substantially the same as the vertical dimension L4 of the housing 41 or the upper limit of the dimensional error of the housing 41. Only set larger. The movement of the housing 41 in the vertical and horizontal directions is restricted by the support piece 71 and the support convex portion 72.

  In addition, at the front end portion of each support piece 71, a restricting piece 73 is provided so as to approach each other (see FIG. 8). The restriction piece 73 is provided so that the front surface is flush with the opening surface of the main body case 10. The housing 41 has a front surface in contact with the restriction piece 73 and a rear surface in contact with the inner bottom surface of the main body case 10, and movement in the front-rear direction is restricted. That is, the housing 41 is fixed to the main body case 10 by the support piece 71, the support convex portion 72, and the restriction piece 73. Instead of providing the support piece 71, the support protrusion 72, and the restriction piece 73 in the main body case 10, the housing 41 can be formed integrally with the main body case 10. Further, the housing 41 can be fixed to the main body case 10 using screws.

  In attaching the light source unit 3 to the main unit 1, the terminal piece 39 a is aligned with the socket 40 by aligning the guide protrusion 30 a with the position of the guide groove 10 c. Further, as described above, the regulation piece 73 is provided so that the front surface is flush with the opening surface of the main body case 10, the front surface of the housing 41 abuts on the regulation piece 73, and the terminal piece 39 a is the light source holder 30. Since the light source unit 3 is attached to the main unit 1 because it protrudes rearward from the rear surface, the terminal piece 39a is inserted into the socket 40, the terminal piece 39a contacts the contact 50, and the light source 31 is electrically connected to the lighting device 12. Connecting.

  By the way, when the light source unit 3 is attached to the main unit 1, the light source holder 30 is inclined with respect to the main unit 1 in such a manner that one of the left and right ends of the light source holder 30 is in front of the other. The terminal piece 39a may be inserted into the socket 40 in a state in which 30 is inclined. In the present embodiment, as described above, since the terminal piece 39a (see FIG. 3) is provided at one place (center) in the middle of the reference direction (left-right direction), the light source unit 3 is attached to the main unit 1. Even when the light source holder 30 is tilted with respect to the main body unit 1 when worn, the terminal piece 39a can be inserted into the socket 40, and the operator can extend the light source holder 30 in the longitudinal direction around the terminal piece 39a. The inclination of the light source holder 30 can be corrected without applying a large load to the terminal piece 39a by moving one end of both ends in front and the other in the rear. As a result, even when the light source holder 30 is tilted with respect to the main unit 1 when attaching the light source unit 3 to the main unit 1, the light source 31 is electrically connected to the lighting device 12, and the operator can When the inclination of 30 is corrected, the possibility that the terminal piece 39a is bent or damaged is reduced.

  Furthermore, since the elastic piece 52 of the contact 50 (see FIG. 6) can move in the left-right direction as described above, the terminal piece 39a is inserted into the contact 50 in a state where the light source holder 30 is inclined with respect to the main unit 1. However, the load applied in the thickness direction (left-right direction) of the terminal piece 39a can be reduced by moving the contact 50 in the left-right direction, and the light source holder 30 can be moved by moving the elastic piece 52 of the contact 50 in the left-right direction. The load applied to the terminal piece 39a when correcting the inclination of the terminal piece 39a can be reduced, and the possibility that the terminal piece 39a is bent or damaged can be further reduced. When the inclination of the light source holder 30 is corrected, the terminal piece 39a is fitted to the housing 41 in the left-right direction by fitting between the guide protrusion 30a provided on the light source holder 30 and the guide groove 10c provided on the upper wall of the main body case 10. The position of the contact piece 51 of the contact 50 is returned to the center position.

Since the rear end portion of the elastic piece 52 of the contact 50 is supported by the rotating shaft 42c as described above, even if the contact 50 moves to the left and right when the light source unit 3 is removed from the main unit 2, the contact piece 51 returns to the center of the housing 41 in the left-right direction due to the elasticity of the elastic piece 52.
(Embodiment 2)
In the first embodiment, the configuration in which the elastic piece 52 of the contact 50 can move in the left-right direction has been described. However, in the present embodiment, a configuration in which the housing 41 can move in the vertical and horizontal directions with respect to the main body case 10 will be described.

  The distance L <b> 1 between the support pieces 71 shown in FIG. 7 is set to be larger than the dimension L <b> 2 in the left-right direction of the housing 41, and a gap is provided between the housing 41 and the support piece 71. In addition, a distance L3 between the upper surface of the support convex portion 72 provided on the support piece 71 and the inner surface of the upper wall of the main body case 10 is set to be larger than the vertical dimension L4 of the housing 41. A gap is provided between the upper wall of the main body case 10. Therefore, the housing 41 can move up and down and left and right by the gap.

  Since the housing 41 can move up, down, left and right, the load applied to the terminal piece 39a when correcting the inclination of the light source holder 30 can be reduced as in the case of the first embodiment.

  Moreover, since the contact 50 moves when the housing 41 moves up and down, right and left, a socket having a configuration in which the contact 50 is fixed in the housing 41 can be used.

Other configurations are the same as those of the first embodiment.
(Embodiment 3)
In the present embodiment, in Embodiment 1, the mounting base in which the fitting protrusions 43 shown in FIG. 8 protrude from the left and right ends (vertical direction in the drawing) of the front surface of the housing 41 and the terminal pieces 39 are attached. A configuration in which the rear end portion of 39 is inserted between the pair of fitting protrusions 43 will be described.

  The housing 41 is disposed such that the front end of the fitting protrusion 43 abuts on a regulating piece 73 provided on the support piece 71 and the rear surface abuts on the inner bottom surface of the main body case 10. That is, the socket 40 is restricted from moving in the front-rear direction (left-right direction in the figure).

  Each fitting projection 43 includes one of a pair of guide surfaces 43a that face each other in the left-right direction (the vertical direction in the drawing). The guide surface 43a is inclined so that the width dimension of the fitting projection 43 in the left-right direction (vertical direction in the figure) increases toward the rear.

  On the other hand, the mounting base 39 is provided with one of a pair of left and right contact surfaces 39b that contact the guide surface 43a of the fitting protrusion 43 at each end in the left and right direction (vertical direction in the drawing) at the rear end. The mounting base 39 is attached to the light source holder 30 so as to protrude rearward from the rear surface of the light source holder 30 by the protruding dimension of the fitting protrusion 43 provided on the housing 41. Therefore, when the light source unit 3 is attached to the main unit 1, the rear end portion of the mounting base 39 is inserted between the pair of fitting protrusions 43.

  When the light source unit 3 is attached to the main unit 1, the fitting protrusion 43 guides the terminal piece 39 a to the center of the housing 41 in the left-right direction by the contact surface 39 b contacting the guide surface 43 a. That is, after the light source unit 3 is attached to the main body unit 1, in addition to the fitting of the guide protrusion 30 a provided on the light source holder 30 and the guide groove 10 c provided on the main body case 10, the contact surface of the mounting base 39. The terminal piece 39 is also positioned at the center of the housing 41 in the left-right direction by the contact between 39 b and the guide surface 43 a of the fitting protrusion 43.

  In the present embodiment, the front end of the fitting protrusion 43 abuts on the restriction piece 73, and the insertion port 41 a of the housing 41 is located behind the opening surface of the main body case 10 by the protrusion dimension of the fitting protrusion 43. The configuration in which the rear end portion of the mounting base 39 protrudes rearward from the rear surface of the light source holder 30 by the protruding dimension is inserted between the pair of fitting protrusions 43. However, the present invention is not limited to this, and the mounting base 39 and the housing 41 may be in a positional relationship in which the rear end portion of the mounting base 39 is inserted between the pair of fitting protrusions 43. For example, the mounting base 39 and the socket 40 are positioned so that the front end of the fitting protrusion 43 is in front of the opening surface of the main body case 10 and the rear surface of the mounting base 39 is flush with the rear surface of the upper wall of the light source holder 30. The rear end portion of the mounting base 39 may be inserted between the pair of fitting protrusions 43.

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

DESCRIPTION OF SYMBOLS 1 Main body unit 2 Display unit 3 Light source unit 10 Main body case 21 Display panel 22 Light guide plate 30 Light source holder 31 Light source 39 Mounting base 39a Terminal piece 40 Socket 41 Housing 43 Fit protrusion 50 Contact 51 Contact piece 52 Elastic piece 71 Support piece (Mounting) frame)
72 Supporting convex part (mounting frame)

Claims (5)

A main body unit including a main body case that is formed in a box shape having an opening on the front surface and accommodates a lighting device;
A light guide plate that is formed in a plate shape and emits light incident on an incident surface that is one end surface along the front-rear direction from a light exit surface that is a front surface, and a display panel that is disposed on the front side of the light guide plate. A display unit that closes the part,
A light source unit that includes a light source holder that is disposed on the incident surface side of the light guide plate so as to accommodate a light source that is turned on by the lighting device and is in contact with the display unit, and that blocks a remaining portion of the opening of the main body case;
The main body unit includes a plurality of contacts that are electrically connected to the lighting device and attached to the main body case,
The light source holder is formed in a long shape in a reference direction which is a direction along the boundary line of the display unit,
The light source unit includes a terminal piece that protrudes from the rear surface of the light source holder and is inserted into the main body case to contact the contact.
Terminal pieces, that provided with a plurality of electrodes in contact a respective one of the contacts is electrically connected to the light source, is provided at one location of the put that criteria direction of the intermediate to the rear surface of the light source holder An indicator light characterized by   The main body unit includes a housing that accommodates the contact and is attached to the main body case, and the contact between the contact and the wall of the housing and between the housing and the main body case is provided with the contact with respect to the main body case. The indicator lamp according to claim 1, wherein a gap that allows movement in at least the reference direction is provided.   The contact comprises a leaf spring, and includes an elastic piece having one end supported by the housing so as to have elasticity in the reference direction, and a contact piece coupled to the other end of the elastic piece and in contact with the terminal piece, The indicator lamp according to claim 2, wherein the gap is provided between the elastic piece and the wall of the housing, and the contact is movable in the reference direction by the gap.   The main body case includes a mounting frame that is coupled to an inner side surface of a side wall and the housing is disposed on the inner side, and the gap is provided between the housing and the mounting frame, and the housing moves in a reference direction by the gap. The indicator lamp according to claim 2, which is possible.   The light source unit includes a box-like mounting base to which the terminal piece is attached and abuts with the housing in the front-rear direction, and the housing protrudes forward, and a pair of fittings are inserted between the rear ends of the mounting base. 5. One of the mating projections is provided on one of both end portions in the reference direction, respectively, and the surfaces of the pair of mating projections facing each other are in contact with the mounting base, respectively. The indicator light according to item 1.

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