JP4976171B2 - Display device - Google Patents

Description

  The present invention relates to a display device provided with a diffusion plate that diffuses light emitted from a light source in a case in which a plurality of light sources are accommodated.

Conventionally, a plurality of light sources are accommodated in a case in a row, and in this case, an opening from which light from the light source is emitted is provided with a diffusing plate and a dial plate overlapped. 2. Description of the Related Art A display that is composed of letters and designs and has a display portion that emits light when a light source is turned on is known (for example, see Patent Document 1).
That is, the display device described in Patent Document 1 is applied to a portion of the meter panel that displays the select position of the automatic transmission, and the dial has P, R, N, D, etc. indicating the select position. Is displayed, one of the light sources is turned on in accordance with the select position, and one of the character parts such as P, R, N, D, etc. is turned on as a display unit arranged in the emission direction. Is done.
JP 2005-67292 A

However, in the above-described prior art, when light emitted from the light source passes through the diffuser plate, a part of the light travels in the direction along the diffuser plate to cause light leakage. In other words, the display unit adjacent to the lit display unit is lit thinly, for example, when the display unit is arranged in a separate manner or when the diffuser plate and the dial plate are arranged apart from each other.
Therefore, in order to prevent the adjacent display portions from being lit thinly due to such light leakage, the display portions are disposed sufficiently apart from each other, or the diffuser plate and the dial plate are disposed in contact with each other. There is a problem that the degree of freedom in design is reduced accordingly.

  The present invention has been made paying attention to the above-mentioned conventional problems, and provides a display device capable of improving the degree of freedom in design by suppressing light leakage to adjacent display portions in a diffusion plate. It is for the purpose.

In order to achieve the above-described object, the present invention is formed in a box shape surrounding the accommodation chamber, and has a case formed with an opening, and is accommodated in the accommodation chamber of the case, and emits light toward the opening. A plurality of possible light sources, a display plate provided over the opening and provided with a plurality of display units illuminated by the light source, and provided on the light source side of the display plate to diffuse the light of the light source A diffuser plate, the diffuser plate being provided between each partition region and a partition region partitioned into regions for performing diffusion corresponding to each display unit. A slotted hole having a slot shape for partitioning the areas, and a connecting portion that is provided adjacent to the slotted hole and connects the sectioned areas, and is inserted into the slotted slot on the case side. And light travels between the compartments through the compartment slots. It is erected shielding plate for shielding the said formed through the diffuser plate at a peripheral position of the connection portion, the light traveling the diffuser plate is linearly between the divided areas via the connecting portion A labyrinth penetrating portion arranged so as to prevent advancing automatically is provided .

Invention according to claim 2, in the display device according to claim 1, wherein the diffusion plate and the display panel are in the form on long plate shape, the partition region and a display section, longitudinal of the diffusion plate The connecting portions are formed at both end edges in a direction orthogonal to the longitudinal direction of the diffusion plate, and the partition long holes extend between the connecting portions in the orthogonal direction. The display device is characterized in that a cutout portion as the labyrinth penetrating portion is formed on both sides in the longitudinal direction of the connecting portion by cutting out from an edge of the diffusion plate.

According to a third aspect of the present invention, in the display device according to the second aspect, the protrusion margin in the orthogonal direction of the notch is formed to be larger than the width of the coupling portion in the orthogonal direction. It was set as the display apparatus characterized by these.

According to a fourth aspect of the present invention, in the display device according to any one of the first to third aspects, the display plate and the diffuser plate are disposed apart from each other in the light emitting direction, and between the two plates. The display device is characterized in that a space is provided, the shielding piece penetrates the diffusion plate, and a front end surface in the standing direction is in contact with the display plate.

In the present invention, at the time of lighting the light source, after the light emitted from the light source is diffused through one partition area arranged corresponding to the light source that is lit among the plurality of partition areas of the diffusion plate, One display part of the plurality of display parts of the display plate arranged in the light emitting direction is illuminated.
At this time, in the partition area where light passes in the diffuser plate, a part of the diffused light travels in the direction of the adjacent partition area through the diffuser plate. Is formed, the continuity of the diffusion plate is blocked, and a shielding plate that shields light from traveling between the partition regions is inserted into the partition slot, so that the adjacent partition regions The progress of light is hindered.
As described above, in the present invention, in the diffusion plate, light leakage to the adjacent partition regions is prevented, and therefore light leakage to the adjacent display portions is prevented even in the display plate.
Therefore, restrictions on the interval between the display units and the interval between the diffusion plate and the display plate are relaxed, and the degree of freedom in design is improved.
Moreover, since the divided areas are connected to each other by a connecting portion, they are easy to carry and have excellent assembling workability as compared with the case where the divided areas are formed separately.

Further, in the present invention , a part of the light traveling toward the adjacent partition region inside the diffusion plate tries to travel through the connecting portion that connects the partition regions, but proceeds linearly toward the connecting portion. The progress of light is hindered by the continuity of the diffusion plate being cut off by the labyrinth penetrating portion penetrating the diffusion plate.
As described above, in the present invention , in the diffusion plate, the progress of light through the connecting portion to the adjacent partition region is hindered, and the light leakage prevention performance is further improved.

In the invention according to claim 2, since the connecting portions are formed on both sides of the edge of the diffusion plate, the light source generally illuminates the partition region and the central portion of the display portion. Compared with the case where is provided in the central part of the diffusion plate, it is difficult for light to proceed to the adjacent partition region via the connecting part, and the light leakage prevention performance is further improved.
In the invention according to claim 3, since the notch is formed so as to protrude from the width of the connecting portion, the connecting portion is formed in comparison with the case where the protruding dimension of the notch is smaller than the width of the connecting portion. It is possible to more reliably prevent the light from passing through and to further improve the light leakage prevention performance.
In the invention described in claim 4, since a space is provided between the diffuser plate and the display plate, a part of the light emitted from the diffuser plate is adjacent to the space of the interval on the display plate. Proceed in the direction of the matching display.
In this invention, since the front end surface of the shielding plate is in contact with the display plate, the light traveling to the adjacent display portion through this space can be blocked by the shielding plate.

  Thus, even in a configuration in which a space is provided between the display panel and the diffusion plate, light leakage can be prevented and the degree of freedom in design becomes higher.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
The display device of this embodiment is formed in a box shape surrounding the accommodation chamber (26) and has a case (2) in which an opening (27) is formed, and the accommodation chamber (26) of the case (2). And a plurality of light sources (31) capable of emitting light toward the opening (27), and a plurality of display units provided to cover the opening (27) and illuminated by the light source (31) ( 64a) and a diffusion plate (5) provided on the light source (31) side of the display plate (64) for diffusing the light from the light source (31). It is a display device, and the diffusion plate (5) is provided between a partitioned area (5a) partitioned into areas that perform diffusion corresponding to each display section (64a), and each partitioned area (5a). A long slot-shaped section long hole (51) for partitioning the section areas (5a), and A connecting portion (5b) that is provided adjacent to the partition long hole (51) and connects the partition regions (5a) to each other, and is inserted into the partition long hole (51) on the case side, The display device is characterized in that a shielding plate (43e) that shields light from traveling between the partition regions (5a) through the partition oblong holes (51) is provided.

  Below, based on FIGS. 1-13, the display apparatus of Example 1 of the best embodiment of this invention is demonstrated.

  As shown in FIG. 4, the display device according to the first embodiment is applied to a display device A that is disposed approximately at the center of the instrument panel 1 in the vehicle width direction (directions of arrows SR and SL in the drawing).

  This display device A displays the mounting state of the seat belt device (not shown) by turning on the five types of design portions shown in FIG. 5, and as shown in FIG. A shade 4, a diffusion plate 5, and a lens 6 are provided.

  The case 2 is formed of a hard resin and surrounds the storage chamber 26 with the left side wall 21, the right side wall 22, the upper wall 23, the lower wall 24, and the rear wall 25, and has an opening / closing opening 27. It is formed in a rectangular box shape. In the description of the first embodiment, the vertical and horizontal directions are based on the vehicle attached to the instrument panel 1 described above. In the drawing, the arrow SR indicates the vehicle right direction, and the arrow SL indicates the vehicle left direction. , Arrow UP indicates the upper side of the vehicle, arrow DN indicates the lower side of the vehicle, arrow FR indicates the front side of the vehicle, and arrow RR indicates the rear side of the vehicle.

Slide guides sandwiched between guide pieces 21 a, 21 b, 22 a, 22 b that are spaced apart from each other on the inner sides of the left and right side walls 21, 22 from the entrance opening 27 toward the back of the storage chamber 26. Grooves 21c and 22c are formed.
Further, as shown in FIG. 7, the groove width H2 on the back wall 25 side is narrower than the groove width H1 on the entrance opening 27 side, as shown in FIG. The groove width H2 on the back wall 25 side is formed to have a dimension substantially equal to the thickness of the substrate 3 so that the substrate 3 can be tightly clamped.
Thus, in the vicinity of the back wall 25 of the slide guide grooves 21c and 22c, a portion formed in a groove width that can be tightly clamped without generating a gap with the substrate 3 is a sandwiching portion 21d. 7 shows the slide guide groove 21c formed in the left side wall 21, the slide guide groove 22c of the right side wall 22 is also formed in the same manner.

Further, as shown in FIG. 6, a substantially rectangular connector connection opening 22e is opened in the right side wall 22 at a position above the vehicle relative to the slide guide groove 22c.
The connector connection opening 22e is an opening for connecting a later-described board-side connector 32 mounted on the board 3 to connect the later-described external connector 10, and the general portion 22f of the right side wall 22 is connected to this connector-side opening 22e. In order to suppress the protruding amount of the external connector 10 in the state, it is arranged inside the edge position of the opening / closing opening 27 and only the vicinity of the opening / closing opening 27 protrudes from the general portion 22f to the right side of the vehicle. A bulging portion 22g is formed.

Further, mounting flanges 28 and 28 are formed on both sides of the entrance opening 27 of the case 2 in the left-right direction of the vehicle so as to protrude in the left-right direction of the vehicle.
In addition, positioning pins 29a and 29b protrude toward the rear of the vehicle at both ends of the opening / closing opening 27 in the vehicle left-right direction.

The substrate 3 is formed of a hard resin material into a plate shape having a shape corresponding to the planar shape of the housing chamber 26 of the case 2 as shown in FIG.
On the upper surface 3 a of the substrate 3, five LEDs (Light Emitting Diodes) 31, 31, 31, 31, 31 are mounted as light sources for illuminating a design portion (described later) formed at five locations of the lens 6. In addition, a board-side connector 32 for connecting an external connector connected to an external device (not shown) is provided.
Each LED 31 is mounted such that light can be emitted rearward of the vehicle (in the direction of arrow RR).
The board-side connector 32 is arranged so that the connection port 32 a faces the connector connection opening 22 e of the case 2 when the board 3 is housed in the housing chamber 26.
In addition, in the end portion 33 on the front side of the vehicle, insertion holes 33a are formed through the substrate 3 at two locations separated in the left-right direction of the vehicle.
Further, the dimension of the substrate 3 in the vehicle front-rear direction is such that the end portion 34 on the vehicle rear side of the substrate 3 from the entrance / exit opening 27 of the case 2 in a state where the substrate 3 is accommodated in the accommodation chamber 26 as shown in FIG. It is formed in a protruding dimension.

  The shade 4 is attached to the case 2 so as to cover the entrance / exit opening 27, and the light emitted from each LED 31 illuminates only the design part to be illuminated arranged behind each vehicle. It blocks light traveling in the direction, is formed of a hard and non-translucent resin, and includes an outer frame portion 41, a flange portion 42, and a partition wall portion 43.

The outer frame portion 41 is formed in a substantially rectangular cylinder that is slightly smaller than the opening / closing opening 27 of the case 2 and faces the vehicle rear side of the outer frame portion 41 as shown in a side view of FIG. The tip is inclined downward in the vehicle.
The flange portion 42 protrudes from the entire circumference of the outer frame portion 41 toward the outer peripheral direction, and is provided at a position slightly behind the vehicle from the end of the outer frame portion 41 on the vehicle front side.

  As shown in the cross-sectional view of the shade 4 in FIG. 9, the partition wall 43 has five substantially pyramid-shaped portions 43 a, 43 a, 43 a, 43 a that divide the inner space of the outer frame portion into five. 43a. The pyramidal portions 43a gradually expand the inner circumference from the light incident portion 43b disposed so as to surround the LED 31 disposed in front of the vehicle toward the light output portion 43c surrounding the design portion on the vehicle front side. Is formed.

  Further, as shown in FIG. 1, the end portion 34 on the vehicle rear side of the substrate 3 housed in the housing chamber 26 of the case 2 is disposed so as to overlap the pyramidal portion 43 a of the partition wall portion 43 in the vehicle front-rear direction. As shown in the front view of the shade 4 in FIG. 10, a notch 43 d that prevents interference with the end portion 33 on the vehicle front side of the substrate 3 is formed continuously to the lower end portion of the light incident portion 43 b of the partition wall portion 43. ing.

  Further, as shown in FIG. 6, in the partition wall 43, substantially rectangular plate-shaped shielding plates 43e protrude toward the rear of the vehicle at four positions between the pyramidal portion 43a and the pyramidal portion 43a. Has been. As shown in FIG. 8, the shielding plate 43e is formed in a shape in which a front end face 43f facing the rear of the vehicle is curved downward. This shape is formed in accordance with the shape of a display plate 64 (to be described later) of the lens 6, that is, in the assembled state of the device shown in FIG. It is formed so that it can contact | abut on the back surface, without producing a clearance gap.

  In addition, six positioning standing pieces 44 for standing are provided on the corner portion formed by the outer periphery of the outer frame portion 41 and the end surface of the flange portion 42 on the vehicle rear side. As shown in FIG. 10, these positioning standing pieces 44 are provided at two places on the upper part of the outer frame part 41, which are erected in the vehicle vertical direction, and at two places on the lower part of the outer frame part 41. There are provided that are erected in the vertical direction and those that are erected in the substantially horizontal direction at two locations on the left and right of the outer frame portion 41.

  Further, as shown in FIG. 6, positioning pins 45 and 45 for positioning the diffusion plate 5 protrude toward the rear of the vehicle at two locations on the left and right of the end surface of the outer frame portion 41 on the vehicle rear side. Positioning notches 42a and positioning holes 42b for positioning the shade 4 with respect to the case 2 are formed on the left and right sides of the flange portion 42 through which positioning pins 29a and 29b protruding from the case 2 are inserted (FIG. 10). reference).

  The diffusing plate 5 diffuses the light emitted from the LED 31 toward the lens 6 so as to have a substantially uniform illuminance as a whole, and is formed in a substantially rectangular plate shape with a transparent resin such as polycarbonate resin. A light diffusing function is given by performing surface processing such as a frosted glass shape or a jagged shape, or by dispersing a light diffusing substance inside or on the surface.

As shown in FIG. 1, the diffusion plate 5 is installed in contact with the front end surface of the outer frame portion 41 of the shade 4. As shown in FIG. 11, the diffusion plate 5 has a light emitting portion 43 c of each partition wall portion 43. The five partitioned areas 5a that cover the entire surface are connected by a pair of connecting portions 5b.
That is, between the partition area 5a and the partition area 5a, an elongated partition long hole 51 is formed in the vehicle vertical direction through which the four shielding plates 43e of the shade 4 are inserted, and the partition areas 5a are separated by the partition long hole 51. Partitioned and disconnected. Moreover, the connection part 5b which connects the division area | regions 5a integrally is provided in the upper and lower sides of this division long hole 51, and all the division area | regions 5a are united.
Furthermore, a positioning notch 52 and a labyrinth notch 53 are formed on the outer periphery of the diffusion plate 5.
The positioning notch 52 is formed in the middle in the vertical direction at both left and right edge portions of the diffusion plate 5, and positioning pins 45, 45 of the shade 4 are inserted during assembly to position the shade 4.

  The labyrinth notch 53 prevents light passing through the inside of the diffusion plate 5 from proceeding linearly to the adjacent partition region 5a via the connecting portion 5b, and is an end in a direction orthogonal to the longitudinal direction of the diffusion plate 5. A pair of left and right edges are arranged on both upper and lower edges, which are edges, and the tip is formed in a substantially triangular shape reaching the same height as the upper and lower ends of the partition slot 51, and vertically and horizontally They are arranged symmetrically.

The lens 6 is attached to the end of the case 2 in a state of covering the shade 4 and the diffusion plate 5, and is formed of a resin having translucency. As shown in FIG. A portion 61, a protruding portion 62, and a locking member 63 are provided.
The outer peripheral frame portion 61 is formed in a substantially rectangular cylindrical shape that is slightly smaller than the opening / closing opening 27 of the case 2.
The projecting portion 62 is formed so as to project from the outer peripheral frame portion 61 in the display direction which is the rear of the vehicle, and is provided with a horizontally long display plate 64 at the tip in the projecting direction (the vehicle rear).

On the surface of the display plate 64, as shown in FIG. 5 which is a front view of the lens 6, five kinds of design portions 64a, 64a, 64a, 64a, 64a representing the seat belt wearing state are provided on the surface of the substrate 3 with the LEDs 31 and The light output portion 43c of the shade 4 overlaps with the vehicle front-rear direction and is arranged in parallel in the vehicle left-right direction.
Further, the display plate 64 is disposed behind the diffusion plate 5 via the space C, and is formed to be curved so as to face the lower side of the vehicle, as shown in FIG. 12 which is a side view of the lens 6. Further, as shown in FIG. 1, a pressing piece 66 for pressing the diffusion plate 5 is formed on the back side of the display plate 64 so as to protrude forward of the vehicle.

  The locking member 63 is formed so as to be engageable with locking claws 23 a and 24 a (see FIG. 7) formed on the upper wall 23 and the lower wall 24 of the case 2 when mounted on the case 2. Further, the mounting flanges 65, 65 projecting laterally from the outer peripheral frame portion 61 face the mounting flanges 28, 28 of the case 2 in an engaged state between the locking member 63 and the locking claws 23 a, 24 a. Are formed so as to contact each other.

Next, a structure for fixing the substrate 3 will be described.
As shown in FIG. 2, which is a perspective view of the case 2 as viewed from an obliquely lower front side of the vehicle, fixing recesses 7 are formed at two locations in the rear wall 25 of the case 2 that are separated in the vehicle left-right direction. The fixing recess 7 exposes a portion of the end portion 33 of the substrate 3 on the vehicle front side (this portion is referred to as a substrate exposed portion 33b) to the outside of the case 2, and accommodates a portion of the back wall 25. The board 3 is in a substantially semicircular shape from the position of the end 33 on the vehicle front side to the vehicle rear side.
Further, as shown in FIG. 1, the height of the fixing recess 7 above the vehicle is formed at the height of the upper surface 3 a of the substrate 3 in the accommodated state. 3 is formed, and further, as shown in FIG. 13, the height of the upper end portion of the vertical wall 72 of the fixing recess 7 is continuous with the substrate support surface 71. Further, an opening 73 for exposing a groove width through which the substrate exposed portion 33b of the substrate 3 can pass is opened.

Further, as shown in FIG. 1, a fastening hole 74 is formed in the board support surface 71. The fastening hole 74 is formed with a female screw on the inner periphery so that the screw 8 for fixing the board 3 can be fastened.
Further, a jig insertion groove 75 having a vertically elongated shape narrower than the fixing recess 7 is formed above the fixing recess 7 in the vehicle so as not to reach the fastening hole 74.
The groove width of the jig insertion groove 75 is formed such that a jig (for example, a minus driver) used for taking out the substrate 3 described later can be inserted.

Next, the operation of the first embodiment will be described.
(Assembly procedure)
The assembly procedure of the display device A will be described. First, the substrate 3 is accommodated in the case 2.
In this case, the left and right edge portions of the substrate 3 are inserted into slide guide grooves 21c and 22c formed on the inner surfaces of the left and right side walls 21 and 22 of the case 2, and the substrate 3 is moved along the slide guide grooves 21c and 22c. It is slid until it hits the back wall 25 and is stored in the storage chamber 26.

  In the sliding of the substrate 3, in the initial stage of the sliding, the substrate 3 slides in a portion where the groove widths of the slide guide grooves 21c and 22c are wide, so that the sliding is performed smoothly. The substrate 3 reaches the clamping portion 21d of the slide guide grooves 21c and 22c immediately before the edge of the accommodation chamber back side of the substrate 3 reaches the inner wall 25, and is firmly clamped. It becomes an accommodation state in which sliding in the direction is restricted.

  In this housed state, the substrate exposed portion 33 b of the end portion 33 on the vehicle front side of the substrate 3 is disposed in the fixing recess 7 outside the case 2 through the exposure opening 73. As shown in FIGS. 1 and 2, the substrate exposed portion 33 b is arranged along the upper surface 3 a of the substrate support surface 71, and the insertion hole 33 a is disposed substantially coaxially with the fastening hole 74.

Therefore, the board 8 is fixed to the case 2 by inserting the screw 8 into the insertion hole 33 a and fastening it to the fastening hole 74.
The above operation is preferably performed with the case 2 turned upside down.

Next, the shade 4 is attached to the opening / closing opening 27 of the case 2.
At this time, the shade 4 is formed by inserting the positioning pins 29 a and 29 b of the case 2 into the positioning notches 42 a and the positioning holes 42 b formed in the flange portion 42 of the shade 4 with the opening / closing opening 27 of the case 2 facing upward. Positioning with respect to case 2 is performed.

Further, the diffusion plate 5 is attached to the tip of the outer frame portion 41 of the shade 4.
At the time of mounting, the shielding plate 43e of the shade 4 is inserted into the partition long hole 51 of the diffusion plate 5, and the positioning pins 45 and 45 of the shade 4 are inserted into the positioning notches 52 and 52 of the diffusion plate 5. Then, the diffusion plate 5 is positioned with respect to the shade 4. This operation can also be performed while preventing the shade 4 and the diffusion plate 5 from falling off by performing the opening / closing opening 27 of the case 2 upward.

Next, the lens 6 is attached to the case 2.
In this case, the lens 6 is placed on the entrance / exit opening 27 side of the case 2 and the inner periphery of the outer peripheral frame portion 61 of the lens 6 is brought into contact with the distal end of the positioning stand piece 44 of the shade 4 in the outer diameter direction. Further, the lens 6 is pushed into the case 2 by the engagement between the locking member 63 and the locking claws 23a, 24a until the locking member 63 of the lens 6 is engaged with the locking claws 23a, 24a of the case 2. Fixed. In addition, when the lens 6 is attached, as shown in FIG. 1, a pressing piece 66 protruding from the back side of the display plate 64 presses the diffusion plate 5 and the shade 4 so as to be sandwiched between the case 2. ing.
The assembly of the display device A is completed through the above steps.

  The display device A assembled in this way is mounted on the vehicle with both mounting flanges 28 and 65 fastened to the instrument panel 1 of the vehicle. In this case, the display device A is attached to the tip of the wiring routed on the vehicle side. The external connector 10 (see FIG. 2) thus inserted is inserted from the connector connection opening 22e of the case 2 to be connected to the board side connector 32 of the board 3 and electrically connected to the vehicle side.

  During the connection work of both the connectors 10 and 32 described above, the load at the time of connection in the vehicle left-right direction is input to the board 3, but the board 3 is fixed to the case 2 with screws 8. It is possible to prevent the substrate 3 from falling out of the slide guide grooves 21c and 22c by the input of a load by this connection work.

(When LED31 is lit)
Next, the operation when the LED 31 is turned on will be described.
When the LED 31 is lit, the light emitted from the LED 31 is diffused by passing through the partition area 5a disposed behind the vehicle, which is the light emission direction of the LED 31, among the plurality of partition areas 5a of the diffusion plate 5. Later, one design portion 64a among the five design portions 64a of the display plate 64 of the lens 6 is illuminated.
At this time, in the diffusion plate 5, the light diffused in the partition region 5 a travels in the direction along the diffusion plate 5 through the inside of the diffusion plate 5. Try to go in the direction of the region 5a.
On the other hand, in the first embodiment, the partition long holes 51 are formed between the partition regions 5 a and the continuity is cut off, and the shielding plate 43 e is inserted into the partition long holes 51. Yes. For this reason, the light traveling toward the adjacent partition region 5a is prevented from advancing by the partition slot 51 and the shielding plate 43e, and light leakage is prevented.
Further, since the adjacent partition regions 5a are connected by the connecting portion 5b, a part of the light traveling to the adjacent partition region 5a tries to go to the connecting portion 5b. Since the labyrinth notches 53 and 53 are formed on both sides of the connecting portion 5b, the above-described light cannot travel linearly to the adjacent partition region 5a and is attenuated on the way.
As described above, light leakage to the adjacent partition region 5a is prevented inside the diffusion plate 5.

Further, since the light that has passed through the diffusion plate 5 passes through the space C between the diffusion plate 5 and the display plate 64 of the lens 6, the design portion 64a that the light that has passed through the diffusion plate 5 illuminates in the space C. However, since the space C is partitioned by the shielding plate 43e, the light toward the adjacent design portion 64a is blocked.
Therefore, in the space C, light leakage to the adjacent design portion 64a is prevented.

As described above, in Example 1, it is possible to prevent light leakage in the diffusion plate 5 and light leakage in the space C between the diffusion plate 5 and the display plate 64 of the lens 6.
For this reason, when it is going to light up the predetermined design part 64a, it can prevent that the adjacent design part 64a lights up lightly by light leakage.
As a result, the degree of freedom in setting the interval between the design portions 64a is increased, and the space C can be set between the diffusion plate 5 and the display plate 64 as in the first embodiment, and the degree of freedom in design is improved. To do.

  Further, in the first embodiment, since the space C can be set, the display plate 64 of the lens 6 is formed in a curved surface, whereas the diffusion plate 5 is a flat plate that is inexpensive and easy to manufacture. As a result, the degree of freedom in design can be improved and the manufacturing cost can be kept low.

(During maintenance)
Next, a procedure for extracting the substrate 3 from the case 2 during the maintenance of the display device A will be described.
First, the external connector 10 is pulled out from the board-side connector 32. At this time, since the board 3 is fixed to the case 2 with the screws 8, the load at the time of pulling out the connector is input to the board 3 in the same manner as when the two connectors 10 and 32 are connected, and the slide guide grooves 21c and 22c. Can be prevented from falling off.

  Next, the fastening of the mounting flanges 28 and 65 to the instrument panel 1 is removed, and the display device A is removed from the instrument panel 1. Then, the engagement between the locking member 63 of the lens 6 and the engagement claws 23a and 24a of the case 2 is released.

Next, the screw 8 is loosened and removed from the case 2.
Then, for example, a jig such as a flat-blade screwdriver is inserted vertically into the jig insertion groove 75 and the fixing recess 7 and the board exposed portion 33b of the board 3 exposed outside the case. The rear edge of the storage chamber is pushed forward of the vehicle and slid backward. In this case, it is preferable that the substrate exposed portion 33 b exposed in the fixing recess 7 is slid until it is hidden in the case 2.

Thereby, the substrate 3 is slid in the direction of the entrance / exit opening 27 from the position held by the holding portion 21d of the slide guide grooves 21c and 22c, and the holding force of the holding portion 21d on the substrate 3 is weakened. The protruding amount of the end portion 34 on the vehicle rear side protruding from the entrance / exit opening 27 toward the vehicle rear increases.
Therefore, a portion of the substrate 3 protruding from the entrance / exit opening 27 is grasped with a finger or a jig and slid toward the rear of the vehicle.

As described above, in the first embodiment, when the board 3 is extracted from the case 2, the edge of the board exposed portion 33b, which is a non-mounting area of the electrical component, is pushed and slid. The damaged electrical parts are not damaged.
In addition, when the substrate 3 is gripped on the entrance / exit opening 27 side after the substrate 3 is pushed out, the portion protruding from the entrance / exit opening 27 can be grasped, and the clamping force by the clamping unit 21d is weakened. As compared with the case where the substrate 3 held and held by the holding portion 21d in the holding chamber 26 is grasped and pulled out, the electrical components mounted on the substrate 3 are prevented from being damaged. In addition to being able to do so, it requires less force to slide and excels in workability.

  Moreover, in the first embodiment, since the fixing recesses 7 are arranged in symmetrical positions, by pressing the substrate 3 little by little equally left and right, it is possible to prevent the substrate 3 from being inclined in the left-right direction, It can be extruded smoothly.

Furthermore, in Example 1, since the entrance / exit opening 27 is covered with the lens 6 having the design portion 64a illuminated by the LED 31 mounted on the substrate 3, the lid that covers the entrance / exit opening 27 separately from the lens 6 is provided. There is no need to provide a member, and the number of parts can be reduced.
Moreover, even if the opening / closing opening 27 is covered with the lens 6, the connector connection opening 22 e is formed in the right side wall 22, so that electrical connection can be made.

  As mentioned above, although embodiment and Example 1 of this invention were explained in full detail with reference to drawings, specific structure is not restricted to this Embodiment and Example 1, and does not deviate from the summary of this invention. A degree of design change is included in the present invention.

  For example, in the first embodiment, the example in which the display device A is applied to a device that displays the mounting state of an in-vehicle seat belt has been described. It can also be applied to industrial equipment other than vehicles, home appliances, and the like.

  In Embodiment 1, the shielding plate 43e formed integrally with the shade 4 is shown as the shielding plate. However, the shielding plate 43e is not limited to this and may be formed integrally with another member such as a case.

  In the first embodiment, the space C is provided between the diffusion plate 5 and the display plate 64. However, the present invention can also be applied to a case where the diffusion plate and the display plate are in contact with each other. In this case, the diffusion plate and the display plate may be formed in a flat plate shape, or both plates may be formed in a curved shape.

  Further, in the first embodiment, the labyrinth notch 53 is shown as a labyrinth penetrating portion. However, the shape of the notch is not limited to a triangle, but other shapes such as an arc shape or a rectangle, or an elongated long hole shape. Other shapes may be used.

  Moreover, in Example 1, although the dimension of the labyrinth notch part 53 showed the example matched with the width | variety of the connection part 5b, if it forms in a dimension larger than the width | variety of the connection part 5b, light leakage prevention performance will improve. To do. On the other hand, if the dimension is smaller than the width of the connecting portion 5b, the light leakage prevention performance is lowered, but the strength of the connecting portion 5b is increased and workability is improved.

Moreover, in Example 1, although the partition area | region 5a and the design part 64a as a display part were shown in one row, it was not limited to this, For example, as shown in FIG. 14, multiple rows were provided. It can also be applied to things.
That is, in the diffusing plates 205 and 305 shown in FIG. 14, the divided areas 205a and 305a are divided into six parts in two rows and three rows in the figure. The regions 205a and 305a are arranged so as to overlap the light emission direction which is the front of the regions 205a and 305a.
When the partition regions 205a and 305a are arranged in this way, the partition oblong hole that is inserted through the shielding plate (not shown) may be formed integrally like the partition oblong hole 251 shown in FIG. Alternatively, a plurality of sections may be formed in each of the vertical and horizontal directions, as in the section elongated holes 351a and 351b in FIG.

  In the case of the example of FIG. 14A, the connecting portion 205b is formed only at the outer peripheral edge of the diffusion plate 205, and therefore the labyrinth penetrating portions 253a, 253b, 253c, 253d, and 254 are the same as in the first embodiment. It is formed only on the outer periphery of the diffusion plate 205. The labyrinth penetrating portion 253a is the triangular notch shown in the first embodiment, but may be formed in other shapes. The labyrinth penetrating portion 253b is semicircular, and the labyrinth penetrating portion 253c is rectangular. The labyrinth penetrating portion 253d has a long-hole notch with an arcuate tip. The labyrinth penetrating portion 254 is formed by combining a rectangular notch and a rectangular through hole.

On the other hand, in the case of the example of FIG. 14B, in addition to the connecting portion 305 b formed at the outer peripheral edge of the diffusion plate 305, a connecting portion 305 c is provided at the center of the diffusion plate 305.
In the example of FIG. 14B, the labyrinth penetrating portions 353a to 353h are shown only in the connecting portion 305c. However, when light leakage at the connecting portion 305b at the outer peripheral edge portion is small, the labyrinth penetrating portion is omitted at this portion. Alternatively, the labyrinth penetrating portion shown in the first embodiment or FIG. 14 (a) may be provided.

Moreover, the labyrinth penetration parts 353a to 353h shown in FIG. 14 (b) are composed of a plurality of holes. That is, the labyrinth penetrating portions 353a, 353b, 353c, and 353d are formed by a plurality of rectangular holes that penetrate the diffusion plate 305, and some of these holes are continuous with the partition long holes 351a and 351b. Is formed.
Labyrinth penetration parts 353e and 353f are formed of a plurality of circular holes. The labyrinth penetrating portions 353g and 353h are formed with a plurality of triangular holes, and some of these holes are formed continuously with the partition long holes 351a and 351b.

Therefore, even in the example shown in FIG. 14, in the diffuser plates 205 and 305, the light traveling to the adjacent partition regions 205 a and 305 a passes through the partition oblong holes 251, 351 a and 351 b and the shielding pieces (not shown). ). In addition, the light that travels to the adjacent partition regions 205a and 305a through the connecting portions 205b and 305c is prevented from proceeding linearly by the labyrinth penetrating portions 253a to 253d, 254, and 353a to 353h. Light leakage through the portions 205b and 305c can be suppressed.
In this way, if the labyrinth penetrating portion is arranged so that the notch or the hole formed through the diffusion plate is prevented so that the light travels linearly through the connecting portion, the desired effect can be obtained. However, the present invention is not limited to the shape and arrangement shown in the first embodiment and FIG.

It is a longitudinal cross-sectional view of the display apparatus A to which the display apparatus of Example 1 of the best mode of the present invention is applied, and shows a state cut along line S1-S1 in FIG. It is a perspective view which shows the state which looked up at the said display apparatus A from diagonally downward. It is a rear view of the display device A. It is a front view which shows the instrument panel 1 carrying the said display apparatus A. It is a front view of the lens 6 of the display device A. 2 is an exploded perspective view of the display device A. FIG. It is a longitudinal cross-sectional view of the lens 6 of the display device A. It is a side view of the shade 4 of the said display apparatus A. It is the shade 4 cross-sectional view of the said display apparatus A. FIG. 3 is a front view of a shade 4 of the display device A. FIG. It is a front view of the diffusion plate 5 of the display device A. It is a side view of the lens 6 of the display device A. It is a case rear view of the display device A. It is a front view of the diffusion plate of the other example of embodiment of this invention, Comprising: (a) shows the diffusion plate 205, (b) has shown the diffusion plate 305. FIG.

Explanation of symbols

2 Case 5 Diffusion plate 5a Partition area 5b Connection portion 6 Lens 31 LED (light source)
51 Section long hole 53 Labyrinth notch (labyrinth penetration)
64 Display board 64a Design part (display part)
A Display device C Space

Claims (4)

The case is formed in a box shape surrounding the storage chamber, and an opening is formed;
A plurality of light sources housed in the housing chamber of the case and capable of emitting light toward the opening;
A display plate provided over the opening and provided with a plurality of display units illuminated by the light source;
A diffusion plate provided on the light source side of the display plate and diffusing the light of the light source;
A display device comprising:
The diffuser plate is divided into regions that perform diffusion corresponding to each display unit, and is provided between each partitioned region, and a slotted slot shaped hole that partitions the partitioned regions, Provided adjacent to the partition oblong hole, and a connecting portion for connecting the partition regions,
On the case side, a shielding plate that is inserted through the partition long hole and shields light from traveling between the partition regions through the partition long hole is erected ,
A labyrinth penetration formed so as to penetrate the diffusion plate at a peripheral position of the connecting portion and to prevent light traveling in the diffusion plate from linearly traveling between the partition regions via the connecting portion. display device, characterized in that it comprises a part. The diffusion plate and the display plate are formed in a long plate shape, and the partition region and the display unit are provided in a line in the longitudinal direction of the diffusion plate,
The connecting portion is formed at both end edges in a direction orthogonal to the longitudinal direction of the diffusion plate, and the partition elongated hole extends in the orthogonal direction between the connecting portions,
The display device according to claim 1, wherein a cutout portion serving as the labyrinth penetrating portion is formed on both sides in the longitudinal direction of the connecting portion by cutting out from an edge of the diffusion plate . The display device according to claim 2 , wherein a protrusion margin of the cutout portion in the orthogonal direction is formed to be larger than a width of the connection portion in the orthogonal direction . The display plate and the diffusion plate are installed apart in the light emission direction, and a space is provided between the two plates.
4. The display device according to claim 1, wherein the shielding piece penetrates the diffusion plate, and a front end surface of the shielding piece is in contact with the display plate. 5. .

Images