JP7777802B2 - display device - Google Patents

Description

This disclosure relates to a display device, and more specifically to a display device that is attached to a ceiling surface.

An example of this type of display device is described in Patent Document 1. The device described in Patent Document 1 is attached to a mounting surface on the ceiling via a mounting bracket.

JP 2013-225531 A

However, depending on the environment in which the display device is installed, mounting brackets may not be necessary. Even in such cases, the device described in Patent Document 1 requires work such as fixing the mounting brackets to the mounting surface, reducing work efficiency. Therefore, there is a demand for a display device that can be attached to a ceiling surface without brackets.

The purpose of this disclosure is to provide a display device that can be attached to a ceiling surface without the need for metal fittings.

A display device according to one aspect of the present disclosure is mounted on a ceiling surface. The display device includes a light source unit, a display panel illuminated by the light source unit, and a box-shaped main body that holds the display panel and the light source unit. The main body has an upper wall at least a portion of which contacts the ceiling surface. The upper wall has a first mounting portion including a pair of first mounting holes and a second mounting portion including a pair of second mounting holes different from the pair of first mounting holes . The first mounting portion is attached to a metal fitting that is fixed to the ceiling surface. The second mounting portion can be attached to the ceiling surface without the metal fitting.

The display device disclosed herein has the advantage of being able to be attached to a ceiling surface without the need for metal fittings.

FIG. 1 is an external view of a display device according to an embodiment of the present disclosure. FIG. 2 is an exploded perspective view of the display device. FIG. 3 is a top view of the display device. FIG. 4 is an exploded perspective view showing the mounting plate of the display device. FIG. 5 is an exploded perspective view illustrating a method for mounting the display device on a ceiling surface.

The figures described in the following embodiments are schematic, and the ratios of the sizes and thicknesses of the components do not necessarily reflect the actual dimensional ratios. Note that the configurations described in the following embodiments are merely examples of the present disclosure. The present disclosure is not limited to the following embodiments, and various modifications are possible depending on the design, etc., as long as the effects of the present disclosure can be achieved.

(1) Overview A display device B1 according to an embodiment of the present disclosure is attached to a ceiling surface 300 as shown in FIG.

The display device B1 described below is an emergency light installed at an emergency exit or a path to an emergency exit in a building such as an office or store. However, the display device according to the embodiment is not limited to emergency lights, and may be used, for example, to indicate a specific location within a building (such as a restroom). In the following description, unless otherwise specified, the up/down, front/back, and left/right directions indicated by arrows in Figure 1 are defined as the up/down, front/back, and left/right directions of the display device B1.

(1-1) Display Device As shown in FIG. 1, the display device B1 includes a light source unit A1, a display panel 20 illuminated by the light source unit A1, and a main body 1 that holds the display panel 20 and the light source unit A1.

(1-1-1) Main Body The main body 1 is made of synthetic resin and has a rectangular box shape with an opening on the front. The display panel 20 and the light source unit A1 are attached to the opening on the front of the main body 1.

As shown in Figure 2, the main body 1 houses a power supply unit 11 for lighting the light source unit A1, a battery unit 13 with a secondary battery, a terminal block 12, a mounting plate 10, and the like.

The power supply device 11 lights the light source unit A1 using normal power supplied from a normal power source (e.g., a commercial power system) and charges the battery unit 13. Furthermore, in the event of a power outage in the power system, the power supply device 11 lights the light source unit A1 using emergency power supplied from the battery unit 13.

The mounting plate 10 is formed into a plate shape from a metal material (see Figure 2). The mounting plate 10 is screwed to the inner bottom surface of the main body 1. The power supply unit 11 and terminal block 12 are screwed to the mounting plate 10 and housed within the main body 1. The battery unit 13 is removably attached to the mounting plate 10.

(1-1-2) Light Source Unit and Display Panel The light source unit A1 has a housing 4, and a light emitting unit, a light guide, and the like (not shown) are housed in the housing 4. The display panel 20 includes a light guide plate 21, and the light guide plate 21 is held by a holder 22.

Light emitted by the light-emitting section of light source unit A1 and guided by the light guide enters light guide plate 21 from the incident surface 210 of light guide plate 21. As the light enters light guide plate 21, it travels through the light guide plate 21 and is totally reflected by the rear surface of holder 22, emitting forward and illuminating display panel 20.

In the embodiment, the light source unit A1 and the display panel 20 are provided on one side of the main body 1, but they may also be provided on both sides of the main body 1.

(1-1-3) Upper Wall of Main Body The main body 1 has an upper wall 100 at least a portion of which contacts the ceiling surface 300 .

As shown in Figure 3, the upper wall 100 has a first mounting portion 116 and a second mounting portion 117. The upper wall 100 also has a power supply hole 115 through which the power supply line 303 is pulled in.

(1-1-3a) First Mounting Portion The first mounting portion 116 is attached to a metal fitting 101 that is fixed to the ceiling surface 300 .

Details will be provided later, but for example, as shown in Figure 5, a metal fitting 101 having a pair of nut bolts 106a, 106b and a pair of metal fitting mounting holes (107a1, 107a2), 107b formed therein is attached to the ceiling surface 300 with a pair of screws 110a, 110b.

As shown in Figures 3-5, the first mounting portion 116 includes a pair of first mounting holes (a pair of first wall mounting holes 116a, 116b formed in the upper wall 100 of the main body 1, and a pair of first plate mounting holes 16a, 16b formed in the facing portion 10A of the mounting plate 10) that engage with a pair of nut-equipped bolts 106a, 106b. The first mounting portion 116 is attached to the ceiling surface 300 by engaging the pair of first mounting holes (116a, 116b and 16a, 16b) with the pair of nut-equipped bolts 106a, 106b.

(1-1-3b) Second Mounting Portion The second mounting portion 117 can be mounted to the ceiling surface 300 without using the metal fitting 101 .

The second mounting portion 117 includes, for example, a pair of second mounting holes (a pair of second wall mounting holes (117a1, 117a2), 117b) formed in the upper wall 100 of the main body 1, and a pair of second plate mounting holes (17a1, 17a2), 17b) formed in the facing portion 10A of the mounting plate 10, as shown in Figures 3-5, and is attached to the ceiling surface 300 with a pair of screws 110a, 110b without using the metal fittings 101.

However, the second mounting portion 117 can also be mounted with a pair of screws 110a, 110b without using the metal fitting 101 for mounting, with the metal fitting 101 interposed therebetween.

In this way, display device B1 can be attached using the first attachment portion 116 via metal fitting 101, or using the second attachment portion 117 without using metal fitting 101. Display device B1 can also be attached using the second attachment portion 117 via metal fitting 101. Therefore, display device B1 can be attached to the ceiling surface 300 without using metal fitting 101.

Therefore, in environments where the metal fittings 101 are not required, the display device B1 can be installed without the need to fasten the metal fittings 101 to the ceiling surface 300, thereby improving work efficiency.

(2) Details (2-1) Ceiling Surface A metal box (not shown) is provided on the back side of the ceiling surface 300, and as shown in Figure 5, this box has a pair of screw holes (301a, 301b), (302a, 302b) formed at positions corresponding to a pair of second mounting holes for the plate (17a1, 17a2), 17b.

In this embodiment, as shown in FIG. 5, screw holes 301a and 301b are formed at positions corresponding to second plate mounting holes 17a1 and 17a2 (and second wall mounting holes 117a1 and 117a2: not shown), and screw holes 302a and 302b are formed at positions corresponding to second plate mounting hole 17b (and second wall mounting hole 117b: not shown). The distance between the pair of outer screw holes 301a and 302b is d1, and the distance between the pair of inner screw holes 301b and 302a is d2. Note that d1 is, for example, 83.5 mm, and d2 is, for example, 66.7 mm, but is not limited to these. A pair of screws 110a and 110b is screwed into the pair of outer screw holes 301a and 302b or the pair of inner screw holes 301b and 302a.

In addition, a power cord 303 is pulled out from a box (not shown) located on the back side of the ceiling surface 300.

(2-2) Details of the First and Second Mounting Portions: Two Types of Pairs of Mounting Holes Corresponding to Different Movements The first mounting portion 116 includes a pair of first wall mounting holes 116a, 116b. The pair of first mounting holes 116a, 116b corresponds to a first movement of the upper wall 100 relative to the ceiling surface 300.

The first movement is, for example, a rotational movement. In this embodiment, the first movement is a movement in which the upper wall 100 (main body 1) rotates around an axis 310 perpendicular to the ceiling surface 300.

The second mounting portion 117 includes a pair of second wall mounting holes (117a1, 117a2), 117b. The pair of second wall mounting holes (117a1, 117a2), 117b correspond to a second movement of the upper wall 100 relative to the ceiling surface 300, which is different from the first movement described above.

The second movement is, for example, a translational movement. In this embodiment, the second movement is a translational movement of the upper wall 100 (main body 1) in one direction parallel to the ceiling surface 300.

The direction parallel to the ceiling surface 300 is, for example, the first direction (left-right direction in Figure 1), which is the direction of a straight line connecting the pair of first wall mounting holes 116a, 116b formed in the upper wall 100. In this embodiment, the first direction is the direction of a straight line connecting the small holes of the pair of first wall mounting holes 116a, 116b.

Note that the combination of the first and second movements is not limited to the above. For example, the first movement may be a translational movement and the second movement a rotational movement. Or, for example, the first movement may be a rotational movement and the second movement a combination of a translational movement and a rotational movement (for example, a translational movement followed by a rotational movement). The upper wall 100 is formed with a pair of first wall mounting holes corresponding to the first movement and a pair of second wall mounting holes corresponding to the second movement.

In this way, the two types of pairs of mounting holes correspond to mounting to the ceiling surface 300 via the metal fittings 101, and mounting to the ceiling surface 300 without the metal fittings 101. Specifically, the pair of first wall mounting holes 116a, 116b correspond to rotational movement, and the pair of second wall mounting holes (117a1, 117a2), 117b correspond to translational movement. When mounting the display device B1 to the metal fittings 101 fixed to the ceiling surface 300, the display device B1 can be positioned relative to the ceiling surface 300 by rotational movement, and when mounting the display device B1 to the ceiling surface 300 without the metal fittings 101, the display device B1 can be positioned relative to the ceiling surface 300 by translational movement.

(2-2-1) Pair of First Wall Mounting Holes The pair of first wall mounting holes 116a, 116b are formed in a point-symmetric shape, which means that when one of the holes is rotated 180 degrees around a certain point, it overlaps with the other hole.

The pair of first wall mounting holes 116a, 116b have a shape that is point-symmetrical with respect to the intersection 311 between the axis 310 and the upper wall 100, as shown in Figure 5, for example.

Specifically, each of the pair of first wall mounting holes 116a, 116b is a Daruma-shaped hole (hereinafter referred to as a "Daruma hole") consisting of a large hole and a small hole connected to the large hole. In a Daruma hole, the small hole is designed so that only the bolts 106a, 106b attached to the metal fitting 101 can pass through, but not the nuts. On the other hand, the large hole is designed so that the nuts can also pass through.

The pair of first wall mounting holes 116a, 116b are congruent but oppositely oriented (the small hole is positioned opposite to the large hole). That is, in first mounting hole 116a, the small hole is located above the large hole, and in first mounting hole 116b, the small hole is located below the large hole.

In this way, mounting can be performed via the metal fitting 101 using a pair of first wall mounting holes 116a, 116b, which have a point-symmetric shape that corresponds to rotational movement.

(2-2-2) Pair of Second Wall Mounting Holes At least one of the pair of second wall mounting holes (117a1, 117a2), 117b includes an elongated hole 103 (first elongated hole) extending in the above-mentioned one direction (first direction). Such elongated hole 103 corresponds to the above-mentioned translation.

The elongated holes 103 correspond to a pair of screw holes 302a, 302b formed in the ceiling surface 300, as shown in Figure 5, for example.

The elongated hole 103 has a length that exceeds the distance between the pair of screw holes 302a and 302b. The elongated hole 103 is also wide enough to allow only the screw portion to pass through, but not the head of the screw.

(2-2-2a) One of the Pair of Second Wall Mounting Holes In this embodiment, one of the pair of second wall mounting holes (117a1, 117a2), 117b includes the elongated hole 103. Specifically, as shown in FIG. 3, the second mounting hole 117b includes the elongated hole 103.

In this way, a pair of second wall mounting holes (117a1, 117a2), 117b, which include elongated holes 103 in the first direction that accommodate parallel movement, allows for mounting without using metal fittings 101.

In addition to the elongated hole 103, the second mounting hole 117b further includes an insertion hole 102 that expands into a round or rectangular shape from one end of the elongated hole 103. In other words, the insertion hole 102 is connected to the elongated hole 103 and has a diameter (e.g., diameter, maximum diameter) greater than the width of the elongated hole 103. The insertion hole 102 can also pass through the heads of the screws 110a and 110b.

With the display device B1, the main body 1 can be temporarily fastened using the insertion hole 102, making installation easier without using the metal fittings 101.

(2-2-2b) The other of the pair of second wall mounting holes (117a1, 117a2), 117b, is a long hole (second long hole) extending in a second direction (front-to-back direction in FIG. 1) perpendicular to the first direction. Note that the second long hole (17a1, 17a2) is shorter than the first long hole 103, as shown in FIG. 3.

The second mounting holes 17a1 and 17a2 correspond to a pair of screw holes 301a and 301b formed in the ceiling surface 300, as shown in Figure 5.

The second mounting holes 17a1 and 17a2, which are elongated holes (second elongated holes), also allow for parallel movement in a direction (second direction) perpendicular to one direction (first direction), making it easier to align the unit with the ceiling surface 300.

(2-2-3) Positional Relationship of Two Types of Pairs of Second Wall Mounting Holes The pair of second wall mounting holes (117a1, 117a2), 117b are formed at positions sandwiched between the pair of first wall mounting holes 116a, 116b. In this embodiment, the pair of second mounting holes (117a1, 117a2), 117b are formed at positions along a straight line connecting the small holes of the pair of first wall mounting holes 16a, 16b.

This helps to avoid an increase in size compared to when the mounting holes are formed at positions sandwiched between the pair of first wall mounting holes 116a, 116b.

(2-2-4) Mounting Plate In this embodiment, the main body 1 is made of resin, as described above, which reduces the weight of the display device B1.

Generally, when attaching the display device B1 to the ceiling surface 300 without the metal fittings 101, the top wall 100 is fixed to the ceiling surface 300 with screws 110a and 110b, and the reaction force of the weight of the display device B1 is applied directly to the top wall 100 of the main body 1 through the heads of the screws 110a and 110b. For this reason, a resin main body 1 may not have enough strength, and the top wall 100 may be deformed or damaged.

The display device B1 therefore uses a metal mounting plate 10 housed in the main body 1 to prevent deformation or damage to the upper wall 100. However, if the upper wall 100 is strong enough to prevent deformation or damage, the mounting plate 10 does not need to be used.

(2-2-4a) Facing Portion The mounting plate 10 includes a facing portion 10A that faces the upper wall 100. The above-mentioned two types of pairs of mounting holes are also formed in the facing portion 10A.

(2-2-4b) Pair of First Plate Mounting Holes and Pair of Second Plate Mounting Holes The facing portion 10A has a pair of first plate mounting holes 16a, 16b and a pair of second plate mounting holes (17a1, 17a2), 17b.

That is, the first mounting portion 116 described above includes a pair of first wall mounting holes 116a, 116b, as well as a pair of first plate mounting holes 16a, 16b. Furthermore, the second mounting portion 117 includes a pair of second wall mounting holes (117a1, 117a2), 117b, as well as a pair of second plate mounting holes (17a1, 17a2), 17b.

The pair of first plate mounting holes 16a, 16b are formed at positions corresponding to the pair of first wall mounting holes 116a, 116b. The pair of second plate mounting holes (17a1, 17a2), 17b are formed at positions corresponding to the pair of second wall mounting holes (117a1, 117a2), 117b.

The matters explained in (2-2-1) and elsewhere regarding the pair of first wall mounting holes 116a, 116b also apply to the pair of first plate mounting holes 16a, 16b. Furthermore, the matters explained in (2-2-2) and elsewhere regarding the pair of second wall mounting holes (117a1, 117a2), 117b also apply to the pair of second plate mounting holes (17a1, 17a2), 17b.

The facing portion 10A also has a power supply hole 15 through which the power cord 303 is pulled in.

In this way, in the display device B1 of this embodiment, the metal facing portion 10A is interposed between the top wall 100 of the main body 1 and the heads of the screws 110a and 110b, so even when the resin top wall 100 is fixed with the screws 110a and 110b, deformation or damage to the top wall 100 can be prevented.

(2-2-5) Ribs on the Upper Wall The upper wall 100 further has ribs 120. The ribs 120 are erected around the pair of first wall mounting holes 116a, 116b and the pair of second plate mounting holes (17a1, 17a2), 17b.

This improves the strength of the upper wall 100. Furthermore, when the main body 1 is fixed with screws 110a and 110b, the direction of the screws 110a and 110b can be regulated.

5, the metal fitting 101 has a pair of nut bolts 106a, 106b and a pair of metal fitting mounting holes (107a1, 107a2), 107b. The metal fitting 101 also has a power supply hole 105 into which the power supply line 303 is drawn.

One of the pair of metal fitting mounting holes (107a1, 107a2), 107b (metal fitting mounting hole 107b in this embodiment) includes an elongated hole 103 (first elongated hole) extending in the direction of the straight line connecting the pair of nut-equipped bolts 106a, 106b (the same direction as the first direction when the upper wall 100 is attached to the ceiling surface 300 via the metal fitting 101). Note that because the metal fitting 101 is lighter than the display device B1 and does not require temporary fastening, the metal fitting mounting hole 107b does not include an element corresponding to the insertion hole 102 of the display device B1.

A pair of nut-equipped bolts 106a, 106b are installed at positions corresponding to the pair of first wall mounting holes 116a, 116b. A pair of metal fitting mounting holes (107a1, 107a2), 107b are formed at positions corresponding to the pair of second wall mounting holes (117a1, 117a2), 117b (and the pair of second plate mounting holes (17a1, 17a2), 17b)).

The display device B1 is attached to the ceiling surface 300 via such metal fittings 101. The diameter of the nut is larger than the diameter of the heads of the screws 110a and 110b (see Figure 5), and the force per unit area at the contact point between the nut and the upper wall 100 is weak, so deformation of the upper wall 100 is suppressed even with a plastic main body 1.

(3) Installation Example The display device B1 is installed on the ceiling surface 300 after the light source unit A1 and the display panel 20 have been removed from the main body 1. Specifically, the installation is performed in one of the following two procedures.

(3-1) Installation Example 1: Use of Metal Fitting In this example, first, metal fitting 101 is fixed to ceiling surface 300 with a pair of screws 110a, 110b. In more detail, for example, as shown in Fig. 5, the pair of screws 110a, 110b pass through a pair of metal fitting mounting holes (107a1, 107a2), 107b of metal fitting 101 and are screwed into a pair of screw holes 301b, 302a, thereby fixing metal fitting 101 to ceiling surface 300.

Next, the pair of nut-equipped bolts 106a, 106b of the metal fitting 101 are inserted into the pair of first wall mounting holes 116a, 116b in the top wall 100 of the main body 1 from the large hole side. Next, by rotating the top wall 100 (main body 1), the position of the pair of nut-equipped bolts 106a, 106b moves from the large hole side to the small hole side. The nuts are then tightened, thereby fixing the top wall 100 of the main body 1 to the ceiling surface 300 via the metal fitting 101.

(3-2) Mounting Example 2: No Metal Fittings Used In this example, first, the screw 110b is screwed partway into the screw hole 302a or 302b. Next, the head side of the screw 110b is inserted through the insertion hole 102 of the second wall mounting hole 117b in the upper wall 100 (and the second plate mounting hole 17b in the mounting plate 10), and the main body 1 is translated in the first direction so that the head side of the screw 110b is displaced toward the elongated hole 103. This temporarily fastens the upper wall 100 of the main body 1 to the ceiling surface 300.

Next, the screw 110a is threaded through the second plate mounting hole 17a and the second wall mounting hole 117a2 and into the screw hole 301b. The screw 110b, which was already partially threaded, is then threaded further, thereby fixing the top wall 100 of the main body 1 directly to the ceiling surface 300 without using the metal fitting 101.

(4) Summary The display device (B1) according to the first aspect of the present disclosure is attached to a ceiling surface (300). The display device (B1) includes a light source unit (A1), a display panel (20) illuminated by the light source unit (A1), and a box-shaped main body (1) that holds the display panel (20) and the light source unit (A1). The main body (1) has an upper wall (100) at least a portion of which contacts the ceiling surface (300). The upper wall (100) has a first mounting portion (116) and a second mounting portion (117). The first mounting portion (116) is attached to a metal fitting (101) that is fixed to the ceiling surface (300). The second mounting portion (117) can be attached to the ceiling surface (300) without the metal fitting (101).

This configuration allows the first mounting portion (116) to be attached to the metal fitting (101) fixed to the ceiling surface (300), and also allows for attachment using the second mounting portion (117) without the metal fitting (101), making it possible to attach the device to the ceiling surface (300) without the metal fitting (101).

In addition, when the metal fittings (101) are interposed between the main body (1) and the ceiling surface (300), it may be possible to mount the unit using the second mounting portion (117) without using the metal fittings (101) for mounting.

In the display device (B1) according to the second aspect, in the first aspect, the first mounting portion (116) includes a pair of first mounting holes (116a, 116b). The pair of first mounting holes (116a, 116b) correspond to a first movement of the upper wall (100) relative to the ceiling surface (300). The second mounting portion (117) includes a pair of second mounting holes ((117a1, 117a2), 117b). The pair of second mounting holes ((117a1, 117a2), 117b) correspond to a second movement of the upper wall (100) relative to the ceiling surface (300) that is different from the first movement.

In this embodiment, two types of mounting holes corresponding to different movements allow for mounting to the ceiling surface (300) without the need for metal fittings (101).

In the display device (B1) according to the third aspect, in the second aspect, the first movement is a rotational movement of the upper wall (100) around an axis (310) perpendicular to the ceiling surface (300). The second movement is a translational movement of the upper wall (100) in one direction parallel to the ceiling surface (300).

This configuration allows the pair of first mounting holes (116a, 116b) corresponding to rotational movement to be attached to a metal fitting (101) fixed to the ceiling surface (300), and the pair of second mounting holes (117a1, 117a2, 117b) corresponding to translational movement to be attached to the ceiling surface (300) without the metal fitting (101).

In the display device (B1) of the fourth aspect, in the third aspect, the pair of first mounting holes (116a, 116b) have a shape that is point-symmetrical with respect to the intersection (311) between the axis (310) and the upper wall (100).

In this embodiment, attachment via the metal fitting (101) is possible using a pair of first attachment holes (116a, 116b) that are point-symmetric and correspond to rotational movement.

In the display device (B1) of the fifth aspect, in the fourth aspect, at least one of the pair of second mounting holes ((117a1, 117a2), 117b) includes an elongated hole (103) extending in the one direction.

In this embodiment, a pair of second mounting holes (117a1, 117a2, 117b) including a one-directional elongated hole (103) that accommodates parallel movement allows for mounting without using a metal fitting (101).

In the display device (B1) of the sixth aspect, in the fifth aspect, one of the pair of second mounting holes (117a1, 117a2, 117b) further includes an insertion hole (102) that expands into a round or rectangular shape from one longitudinal end of the elongated hole (103).

This configuration allows the main body (1) to be temporarily fastened using the insertion hole (102), making installation easier without using the metal fittings (101).

In the display device (B1) of the seventh aspect, in the sixth aspect, the one direction is the first direction. The other of the pair of second mounting holes (117a1, 117a2, 117b) is a second elongated hole extending in a second direction perpendicular to the first direction.

This aspect also enables parallel movement in a direction (second direction) perpendicular to the one direction (first direction), thereby facilitating alignment with the ceiling surface (300).

In the display device (B1) according to the eighth aspect, in any of the second to seventh aspects, the pair of second mounting holes (117a1, 117a2, 117b) are formed at positions sandwiched between the pair of first mounting holes (116a, 116b).

This configuration helps to avoid an increase in size compared to when the holes are formed at positions sandwiching the pair of first mounting holes (116a, 116b).

In the display device (B1) according to the ninth aspect, in any one of the second to eighth aspects, the main body (1) is made of resin. The display device (B1) further includes a metal mounting plate (10) housed in the main body (1). The mounting plate (10) includes a facing portion (10A) facing the upper wall (100). The pair of first mounting holes (116a, 116b) are a pair of first wall mounting holes (116a, 116b). The pair of second mounting holes ((117a1, 117a2), 117b) are a pair of second wall mounting holes ((117a1, 117a2), 117b). The facing portion (10A) has a pair of first plate mounting holes (16a, 16b) and a pair of second plate mounting holes ((17a1, 17a2), 17b). The pair of first plate mounting holes (16a, 16b) are formed at positions corresponding to the pair of first wall mounting holes (116a, 116b). The pair of second plate mounting holes (17a1, 17a2, 17b) are formed at positions corresponding to the pair of second wall mounting holes (117a1, 117a2, 117b).

According to this embodiment, even when the upper wall (100) of the resin main body (1) is fixed with screws (110a, 110b), the metal facing portion (10A) is interposed between the upper wall (100) of the main body (1) and the heads of the screws (110a, 110b), preventing deformation or damage to the upper wall (100).

In the display device (B1) according to the tenth aspect, the upper wall (100) of the ninth aspect further includes ribs (120). The ribs (120) are erected around the pair of first wall mounting holes (116a, 116b) and the pair of second wall mounting holes (117a1, 117a2, 117b).

This configuration improves the strength of the upper wall (100). When the main body (1) is fixed with screws (110a, 110b), the direction of the screws (110a, 110b) can be regulated.

In the ninth or tenth aspect, the metal fitting (101) has a pair of nut bolts (106a, 106b) and a pair of metal fitting mounting holes (107a1, 107a2, 107b). The pair of nut bolts (106a, 106b) are installed at positions corresponding to the pair of first wall mounting holes (116a, 116b). The pair of metal fitting mounting holes (107a1, 107a2, 107b) are formed at positions corresponding to the pair of second wall mounting holes (117a1, 117a2, 117b). This allows for mounting via the metal fitting (101).

B1 Display device A1 Light source unit 20 Display panel 11 Power supply device 1 Main body
100 Upper wall 116 First mounting portion 116a, 116b Pair of first mounting holes (pair of first wall mounting holes)
117 second mounting portion (117a1, 117a2), 117b pair of second mounting holes (pair of second wall mounting holes)
102 Insertion hole 103 Elongated hole 120 Rib 10 Mounting plate 10A Facing portion 16a, 16b Pair of first plate mounting holes (17a1, 17a2), 17b Pair of second plate mounting holes 101 Metal fitting 106a, 106b Pair of nut-equipped bolts (107a1, 107a2), 107b Pair of metal fitting mounting holes 300 Ceiling surface

Claims (10)

A display device attached to a ceiling surface,
A light source unit;
a display panel illuminated by the light source unit;
a box-shaped main body that holds the display panel and the light source unit,
the main body has an upper wall at least a portion of which contacts the ceiling surface;
The upper wall is
a first mounting portion that is attached to a metal fitting fixed to the ceiling surface and includes a pair of first mounting holes ;
a second mounting portion including a pair of second mounting holes different from the pair of first mounting holes and capable of being mounted to the ceiling surface without using the metal fittings;
Display device. the first mounting portion includes the pair of first mounting holes corresponding to a first movement of the upper wall relative to the ceiling surface,
the second mounting portion includes the pair of second mounting holes corresponding to a second movement of the upper wall relative to the ceiling surface that is different from the first movement of the upper wall.
The display device according to claim 1 . the first movement is a movement in which the upper wall rotates around an axis perpendicular to the ceiling surface,
The second movement is a movement in which the upper wall moves parallel to one direction parallel to the ceiling surface.
The display device according to claim 2 . the pair of first mounting holes have shapes that are point-symmetric with respect to an intersection point between the axis and the upper wall;
The display device according to claim 3 . At least one of the pair of second mounting holes includes an elongated hole extending in the one direction.
The display device according to claim 4 . One of the pair of second mounting holes further includes an insertion hole expanding into a round or square shape from one end of the elongated hole in the longitudinal direction.
The display device according to claim 5 . the one direction is a first direction,
the other of the pair of second mounting holes is a second elongated hole extending in a second direction perpendicular to the first direction;
The display device according to claim 6. The pair of second mounting holes are formed at positions sandwiched between the pair of first mounting holes.
The display device according to any one of claims 2 to 7. The main body is made of resin,
Further provided is a metal mounting plate housed in the main body,
the mounting plate includes a facing portion facing the upper wall,
the pair of first mounting holes are a pair of first wall mounting holes,
the pair of second mounting holes are a pair of second wall mounting holes,
The facing portion is
a pair of first plate mounting holes formed at positions corresponding to the pair of first wall mounting holes;
a pair of second plate mounting holes formed at positions corresponding to the pair of second wall mounting holes;
A display device according to any one of claims 2 to 8. The upper wall further includes ribs extending from the pair of first wall mounting holes and the pair of second wall mounting holes.
The display device according to claim 9 .