JP7792621B2 - display device - Google Patents

Description

This disclosure relates to a display device, and more specifically to a display device that houses wiring within its main body.

The display device described in Patent Document 1 is an example of a conventional device. The display device described in Patent Document 1 (hereinafter referred to as the conventional example) comprises a main body, a display unit with a light-emitting surface, and a light source unit that illuminates the light-emitting surface of the display unit. The main body has a built-in lighting device that lights up the light source unit. A battery storage unit provided inside the main body stores a battery that has wiring and a connector for supplying power to the lighting device. A wiring fixing unit provided inside the main body fixes the battery wiring to prevent the battery from coming out of the battery storage unit.

The wiring fixing section is made up of multiple ribs, and the wiring is supported by being pushed between adjacent ribs.

JP 2014-107097 A

However, in the above-mentioned conventional example, the gaps between the multiple ribs of the wiring fixing portion are open toward the opening on the front of the main body, which creates the problem that the wiring (wiring member) can easily come loose from the wiring fixing portion.

The objective of this disclosure is to provide a display device that can more reliably support wiring members.

A display device according to one aspect of the present disclosure includes a light source unit, a display panel, a power supply device, a box-shaped main body, and a wiring member. The light source unit has an input section to which power for lighting is input. The display panel is illuminated by the light source unit. The power supply device supplies the power for lighting. The main body holds the light source unit, the display panel, and the power supply device. The wiring member electrically connects the light source unit to the power supply device and serves as a power supply path for the power for lighting. The light source unit and the display panel are held by the main body so as to cover the front surface of the main body. The main body has a first support portion and a second support portion that support the wiring member. The first support portion and the second support portion each have a slit that can support the wiring member inserted through an opening at one end in the longitudinal direction. The first support portion and the second support portion are arranged in a straight line on the main body. The longitudinal direction of the slit in the first support portion is not parallel to the longitudinal direction of the slit in the second support portion.

The display device disclosed herein has the advantage of being able to more reliably support the wiring member.

1A and 1B are perspective views of a display device according to an embodiment of the present disclosure, as viewed from the front and rear, respectively; FIG. 2 is an exploded perspective view of the display device as viewed from the front. FIG. 3 is an exploded perspective view of the display device, omitting the illustration of the first display block. FIG. 4 is an exploded perspective view of a connector portion in the display device. FIG. 5 is a perspective view of the first light source unit in the display device as viewed from behind. FIG. 6 is a perspective view of a main part of the main body of the display device. FIG. 7 is a cross-sectional view of the display device of the same embodiment, with a portion thereof not shown.

Display devices according to embodiments of the present disclosure will be described in detail with reference to the drawings. However, the figures described in the following embodiments are schematic diagrams, 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 The display device B1 according to the embodiment includes a light source unit A1, a display panel 20A, a power supply device 11, a box-shaped main body 1, and wiring members (electric wires 16) (see FIG. 2).

The light source unit A1 has an input section to which power for lighting is input. The display panel 20 is illuminated by the light source unit A1. The power supply unit 11 supplies power for lighting. The main body 1 holds the light source unit A1, the display panel 20, and the power supply unit 11. The wiring member electrically connects the light source unit A1 to the power supply unit 11, and serves as a power supply path for power for lighting. The light source unit A1 and the display panel 20 are held in the main body 1 so as to cover the front of the main body 1.

The main body 1 has a first support portion 17A and a second support portion 17B that support the wiring member. The first support portion 17A and the second support portion 17B each have slits 170A and 170B that can support the wiring member inserted through an opening at one end in the longitudinal direction (see Figure 3). The longitudinal direction of the slit 170A in the first support portion 17A is not parallel to the longitudinal direction of the slit 170B in the second support portion 17B (see Figure 3).

Here, because the longitudinal directions of the two slits 170A, 170B are not parallel, when the wiring member receives a force that moves it toward the opening of slit 170A in first support portion 17A, the movement of the wiring member is restricted by slit 170B in second support portion 17B. Similarly, when the wiring member receives a force that moves it toward the opening of slit 170B in second support portion 17B, the movement of the wiring member is restricted by slit 170A in first support portion 17A.

The display device B1 according to this embodiment has the advantage of being able to more reliably support the wiring members.

(2) Details of the Display Device According to the Embodiment A display device B1 according to the embodiment (hereinafter, abbreviated as display device B1) will be described with reference to the drawings. The display device B1 described below is a so-called double-sided guide light that is installed at an emergency exit or a passageway to an emergency exit in a building such as an office or store, and provides evacuation guidance in two directions, forward and backward. However, the display device according to the embodiment is not limited to an emergency exit light and may be used, for example, to indicate a specific location (such as a restroom) within a building. Furthermore, the display device according to the embodiment may be a so-called single-sided guide light that provides evacuation guidance only in the forward direction. In the following description, unless otherwise specified, the up-down, front-back, and left-right directions indicated by arrows in FIGS. 1A and 1B are defined as the up-down, front-back, and left-right directions of the display device B1.

The display device B1 includes a first light source unit A1, a second light source unit A2, a first display block 2A, a second display block 2B, a main body 1, etc. (see Figures 1A-3).

(2-1) Main Body The main body 1 is made of synthetic resin and formed into a rectangular box shape with an opening on the front (see FIG. 2). However, the main body 1 may be formed into a box shape with an opening on the rear surface, or may be formed into a box shape with no openings on either the front or rear surfaces. The main body 1 houses a power supply device 11 for lighting the first light source unit A1 and the second light source unit A2, a battery unit 13 having a secondary battery, a terminal block 12, a mounting plate 10, a connector portion 7, electric wires 16, a first support portion 17A, a second support portion 17B, etc.

The upper wall of the main unit 1 has a power supply hole 15 (see Figure 2) for pulling in the power cable 6 (see Figure 3). The power supply hole 15 opens approximately in the center of the upper wall in the longitudinal direction (left-right direction). The power cable 6 has two power lines 60, and serves as a power supply path for AC power (normal power) supplied from a normal power source (e.g., a commercial power system).

(2-1-1) Mounting Plate 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 inside the main body 1. The battery unit 13 is detachably attached to the mounting plate 10.

(2-1-2) Power Supply Device The power supply device 11 lights up the first light source unit A1 and the second light source unit A2 with normal power supplied from a normal power source, and charges the battery unit 13. Furthermore, in the event of a power outage of the normal power source, the power supply device 11 lights up the first light source unit A1 and the second light source unit A2 with emergency power supplied from the battery unit 13. Note that "charging the battery unit 13" means charging the secondary battery contained in the battery unit 13. Furthermore, "emergency power supplied from the battery unit 13" means DC power discharged from the secondary battery contained in the battery unit 13.

That is, the power supply device 11 includes a charging circuit for the battery unit 13 and a lighting circuit that uses a normal power source to light the first light source unit A1 and the second light source unit A2. The power supply device 11 also includes an emergency lighting circuit that uses an emergency power source to light the first light source unit A1 and the second light source unit A2, and a case 110 that houses the charging circuit, lighting circuit, and emergency lighting circuit (see Figure 2).

The case 110 is made of synthetic resin and has a box-like shape. It is housed in the lower right corner of the main body 1 and is attached to the mounting plate 10 with screws. An output terminal unit 111 is provided in the upper right corner of the case 110. The output terminal unit 111 has two terminals, a positive pole and a negative pole. These two terminals are connected to the positive and negative poles of the output terminals of the lighting circuit, respectively.

(2-1-3) Terminal Block The terminal block 12 is made of synthetic resin and has a box shape. The terminal block 12 is located above the left side of the power supply device 11 inside the main body 1 and is attached to the mounting plate 10 with screws.

Triangular prism-shaped protrusions 120 are formed side-by-side on the front surface of the terminal block 12 (see Figure 2). Each protrusion 120 has multiple (e.g., three) wire insertion holes. Conductors of the two power lines 60 of the power cable 6 are inserted into these wire insertion holes one by one (see Figure 3). The conductors of the power lines 60 inserted into each wire insertion hole are electrically and mechanically connected, one by one, to multiple screwless terminals (quick-connect terminals) housed inside the terminal block 12. The multiple screwless terminals are also electrically connected to the input terminals of the power supply device 11. In other words, the power lines 60 are electrically connected to the power supply device 11 via the terminal block 12, forming a power supply path for supplying normal power to the power supply device 11.

(2-1-4) Battery Unit The battery unit 13 has a plurality of secondary batteries and a battery case 130 made of synthetic resin that houses the plurality of secondary batteries. The plurality of secondary batteries are, for example, cylindrical nickel-metal hydride secondary batteries. The battery case 130 has a battery connector 131 that is electrically connected to the plurality of secondary batteries. The battery connector 131 is electrically connected in a removable manner to a receiving connector provided on the case 110 of the power supply device 11. The battery unit 13 is located in the main body 1, at the bottom on the left side of the power supply device 11 (below the terminal block 12) (see FIG. 3).

(2-1-5) Connector Section The connector section 7 has a housing 70 made of synthetic resin, two first contacts 74A, and two second contacts 74B (see FIG. 4). In the following description, the front-rear, left-right, and up-down directions indicated by arrows in FIG. 4 are defined as the front-rear, left-right, and up-down directions of the connector section 7. Note that the front-rear, left-right, and up-down directions of the connector section 7 coincide with the front-rear, left-right, and up-down directions of the display device B1.

A total of four contacts (two first contacts 74A and two second contacts 74B) are all formed with the same shape and dimensions. The first contacts 74A and second contacts 74B each have an inverted U-shaped main body 740, a pair of spring pieces 741 protruding from one end of the main body 740, and a rectangular terminal piece 742 protruding from the other end of the main body 740. The main body 740, pair of spring pieces 741, and terminal piece 742 are integrally formed by stamping and bending a metal plate.

The housing 70 has a body 71, a first cover 72, and a second cover 73. The body 71 has a first side wall 711, a second side wall 712, a partition wall 713, a central wall 714, and a pair of mounting walls 715.

The first side wall 711 is formed in the shape of a rectangular flat plate. Two U-shaped insertion grooves 7110 are provided at each of the upper and lower ends of the first side wall 711 at the center of the first side wall 711 in the longitudinal direction (front-to-back direction), lined up at a distance in the front-to-back direction. In addition, two square holes 7111 are provided at each end of the first side wall 711 in the lateral direction (up-down direction), sandwiching the two insertion grooves 7110 on either side.

The second side wall 712 is formed in the shape of a rectangular flat plate. The second side wall 712 is disposed to the right of the first side wall 711 and parallel to the first side wall 711, and is connected to the first side wall 711 by a partition wall 713. The partition wall 713 is formed in the shape of a rectangular flat plate. The partition wall 713 connects the center of the short side of the first side wall 711 and the center of the short side of the second side wall 712 over the entire length of the first side wall 711 and the second side wall 712. In other words, the first side wall 711, the second side wall 712, and the partition wall 713 are integrally formed in an H-shape when viewed from the front. In addition, a groove 7130 extending in the front-to-rear direction is provided in the center of the left-to-right direction at the front and rear ends of the partition wall 713.

The central wall 714 is formed in a flat plate shape and is arranged at the center of the first side wall 711 in the front-to-rear direction so as to be perpendicular to the first side wall 711, the second side wall 712, and the partition wall 713.

Each of the pair of mounting walls 715 is formed in a crank shape when viewed from above. One mounting wall 715 is provided between the front end of the partition wall 713 and the central wall 714, so as to be perpendicular to the first side wall 711, the second side wall 712, and the partition wall 713, respectively. The other mounting wall 715 is provided between the rear end of the partition wall 713 and the central wall 714, so as to be perpendicular to the first side wall 711, the second side wall 712, and the partition wall 713, respectively. In addition, mounting grooves 7150 with their depths extending vertically are provided at the upper and lower ends of the pair of mounting walls 715.

On the upper and lower surfaces of the partition wall 713, one rectangular pillar-shaped support portion 716 is provided in front of the front mounting wall 715 and one behind the rear mounting wall 715. These support portions 716 protrude from the upper and lower surfaces of the partition wall 713 so that their axial directions are aligned vertically.

The first cover 72 is attached to the first side wall 711 so as to cover the upper surface of the body 71. The first cover 72 is formed in the shape of a rectangular flat plate. A pair of ribs 720 is provided at the center in the front-to-rear direction of the left end of the underside of the first cover 72. The pair of ribs 720 are arranged at a distance in the front-to-rear direction and protrude downward. In addition, a pair of claws 721 is provided at the left end of the underside of the first cover 72. The pair of claws 721 are formed in an L-shape when viewed from the front. The pair of claws 721 are arranged in the front-to-rear direction, sandwiching the pair of ribs 720 between them.

The second cover 73 is attached to the first side wall 711 so as to cover the underside of the body 71. The second cover 73 is formed in the shape of a rectangular flat plate. A pair of ribs 730 is provided at the center in the front-to-rear direction of the left end of the upper surface of the second cover 73. The pair of ribs 730 are spaced apart in the front-to-rear direction and protrude upward. In addition, a pair of claws 731 is provided at the left end of the upper surface of the second cover 73. The pair of claws 731 are formed in an L-shape when viewed from the front. The pair of claws 731 are lined up in the front-to-rear direction with the pair of ribs 730 between them. The first cover 72 and the second cover 73 are formed to have the same shape and dimensions.

The first cover 72 is attached to the body 71 by hooking a pair of claws 721 onto the edges of two holes 7111 on the upper side of the first side wall 711. Similarly, the second cover 73 is attached to the body 71 by hooking a pair of claws 731 onto the edges of two holes 7111 on the lower side of the first side wall 711. Thus, by attaching the first cover 72 and the second cover 73 to the body 71, the rectangular cylindrical housing 70 is formed.

The front and rear surfaces of the housing 70 each have two sockets, one above the other. One first contact 74A is located at the back of each of the two sockets on the front surface. Meanwhile, one second contact 74B is located at the back of each of the two sockets on the rear surface. The first contact 74A and second contact 74B are each attached to the body 71 by fitting the main body 740 into the support portion 716 and inserting the terminal piece 742 into the attachment groove 7150 of the attachment wall 715.

Here, the terminal pieces 742 of the first contact 74A and the second contact 74B housed in the upper section of the housing 70 are electrically connected to each other by an electric wire. Meanwhile, one conductor of each of the two electric wires 16 is electrically connected to the terminal piece 742 of the first contact 74A and the terminal piece 742 of the second contact 74B housed in the lower section of the housing 70. The conductors of each of the two electric wires 16 are inserted into the housing 70 through the lower two of the four insertion grooves 7110 provided in the first side wall 711.

The connector unit 7 is attached to the connector mounting portion 18 located in the upper right corner of the main body 1 (see Figure 3). The connector mounting portion 18 has a pair of engagement pieces 180 that protrude leftward from the top of the right wall of the main body 1, and a pair of engagement protrusions 181 that protrude downward from the right end of the upper wall of the main body 1 (see Figure 3).

The connector part 7 is attached to the main body 1 by engaging a pair of engaging pieces 180 with a pair of engaging protrusions 181, one each, on a total of four protrusions 700 that protrude from the top and bottom surfaces at both ends of the housing 70 in the longitudinal direction (front-to-back direction) (see Figure 3).

The connector unit 7 is attached to the main body 1 so that the opening on the front of the housing 70 faces the opening of the main body 1, and the opening on the rear of the housing 70 faces the inner bottom surface of the main body 1. A rectangular window 19 is located in the upper right corner of the inner bottom surface of the main body 1. Therefore, the rear surface of the housing 70 of the connector unit 7 faces the window 19 of the main body 1 (see Figure 3).

(2-1-6) First Support Portions and Second Support Portions The main body 1 has two first support portions 17A and one second support portion 17B along the right wall (see Figures 2 and 3). The two first support portions 17A are arranged on the main body 1 so that the second support portion 17B is sandwiched between them and the distance between them is equal.

Each of the two first support portions 17A is trapezoidal when viewed from the top and bottom (see Figure 6). Each first support portion 17A is formed integrally with the main body 1 so as to protrude from the inner bottom surface and the right-side inner wall surface of the main body 1.

Each of the two first support portions 17A has a slit 170A that is open at one end (front end) in the longitudinal direction (front-to-back direction). The slit 170A is formed in a rectangular shape that extends from the front end of the first support portion 17A to the rear, and is approximately parallel to the right wall of the main body 1. The closed end (rear end) of the slit 170A is located in the center of the main body 1 in the front-to-back direction.

The width (left-right spacing) of the open end (front end) of slit 170A is wider than the width of the closed end (rear end) of slit 170A. Furthermore, the tip portion of slit 170A is formed so that its width gradually narrows from the open end toward the rear.

The second support portion 17B is trapezoidal when viewed from the top and bottom. The second support portion 17B is integrally formed with the main body 1 so as to protrude leftward from the center of the main body 1 in the front-to-back direction on the inner wall surface of the right wall of the main body 1.

The second support portion 17B also has a slit 170B that is open at one end (left end) in the longitudinal direction (left-right direction). The slit 170B is formed in a rectangular shape that is approximately parallel to the rear wall of the main body 1 from the tip (left end) of the second support portion 17B to the right. In other words, the slit 170A of the first support portion 17A and the slit 170B of the second support portion 17B intersect when viewed from the top-bottom direction of the main body 1 (see Figure 6). The width (distance in the front-to-back direction) of the open end (left end) of the slit 170B is wider than the width of the closed end (right end) of the slit 170B. Furthermore, the tip portion of the slit 170B is formed so that its width gradually narrows from the open end to the right.

The two first support portions 17A and one second support portion 17B support wiring members (electrical wires 16) that electrically connect the power supply unit 11 and the connector portion 7 (see Figures 2, 3, and 7). That is, two electrical wires 16 are supported by each of the two first support portions 17A by inserting the electrical wires 16 through the open end of each slit 170A in the two first support portions 17A. Similarly, two electrical wires 16 are supported by one second support portion 17B by inserting the electrical wires 16 through the open end of the slit 170B in the second support portion 17B (see Figures 3 and 7).

Here, when a forward external force is applied to the electric wire 16, the electric wire 16 attempts to move within the slit 170A toward the open end. However, because the longitudinal direction of the slit 170B in the second support portion 17B is not parallel to the longitudinal direction of the slit 170A, the electric wire 16 hits the front end of the slit 170B, restricting its forward movement. In other words, the display device B1 uses the second support portion 17B to prevent the electric wire 16 from falling out of the slit 170A in the first support portion 17A.

Furthermore, when an external force directed to the left is applied to the electric wire 16, the electric wire 16 attempts to move within the slit 170B toward the open end. However, because the longitudinal direction of the slit 170A in the first support portion 17A is not parallel to the longitudinal direction of the slit 170B in the second support portion 17B, the electric wire 16 hits the left end of the slit 170A, restricting its movement to the left. In other words, the display device B1 uses the first support portion 17A to prevent the electric wire 16 from falling out of the slit 170B in the second support portion 17B.

(2-2) First Display Block and Second Display Block The first display block 2A has a display panel 20A, a light guide plate 21A, and a holder 22A (see FIG. 2). The second display block 2B has a display panel 20B, a light guide plate 21B, and a holder 22B (see FIG. 2).

Display panels 20A and 20B are formed in the shape of rectangular flat plates from a translucent synthetic resin material such as acrylic resin or polycarbonate resin. However, display panels 20A and 20B may also be formed from a translucent material other than synthetic resin, such as quartz glass. Evacuation guidance pictograms are displayed on the display surfaces of display panels 20A and 20B (see Figures 1A and 1B).

Light guide plates 21A and 21B are formed in the shape of rectangular flat plates from a translucent synthetic resin material such as acrylic resin or polycarbonate resin.

The light guide plate 21A is disposed behind the display panel 20A with its front surface facing the rear surface of the display panel 20A (see Figure 2). Light emitted from the first light source unit A1 is incident on the upper surface (incident surface) of the light guide plate 21A. The light incident from the incident surface is guided within the light guide plate 21A and emitted from the front surface (exit surface) of the light guide plate 21A. The display panel 20A is then illuminated by the light exiting from the exit surface of the light guide plate 21A.

Light guide plate 21B is positioned in front of display panel 20B so that its rear surface faces the front surface of display panel 20B (see Figure 2). Light emitted from second light source unit A2 is incident on the upper surface (incident surface) of light guide plate 21B. The light incident from the incident surface is guided within light guide plate 21B and emitted from the front surface (exit surface) of light guide plate 21B. The display panel 20B is then illuminated by the light exiting the exit surface of light guide plate 21B.

The holder 22A is made of a non-transparent synthetic resin material and is shaped like a rectangular box with an open front and top. The holder 22A holds the display panel 20A and the light guide plate 21A so that the display panel 20A is positioned in front of the light guide plate 21A (see Figure 2).

The holder 22B is made of a non-transparent synthetic resin material and is shaped like a rectangular box with an open rear and top. The holder 22B holds the display panel 20B and the light guide plate 21B so that the display panel 20B is positioned in front of the light guide plate 21B (see Figure 2).

The first display block 2A is attached to the main body 1 so as to cover the remaining portion of the opening of the main body 1, excluding the upper portion where the first light source unit A1 is attached (see Figure 1A). The second display block 2B is attached to the main body 1 at the rear surface of the main body 1, so as to cover the remaining portion, excluding the upper portion where the second light source unit A2 is attached (see Figure 1B).

(2-3) First Light Source Unit and Second Light Source Unit The first light source unit A1 and the second light source unit A2 have the same basic structure. Therefore, the first light source unit A1 will be described below with reference to FIG. 5, and the second light source unit A2 will be described only with respect to the differences from the first light source unit A1. Note that in the following description, the components common to the first light source unit A1 and the second light source unit A2 are distinguished by the numerals followed by the symbol "A" for the components of the first light source unit A1 and the symbol "B" for the components of the second light source unit A2.

The first light source unit A1 has a light-emitting block 3A, a light guide 5A, and a housing 4A. In the following description, unless otherwise specified, the up-down, front-back, and left-right directions indicated by arrows in Figure 5 are defined as the up-down, front-back, and left-right directions of the first light source unit A1. The up-down, front-back, and left-right directions of the first light source unit A1 coincide with the up-down, front-back, and left-right directions of the display device B1.

The light-emitting block 3A has a light-emitting unit 30A and a heat dissipation member 31A. The light-emitting unit 30A has an LED, which is a solid-state light source, and a substrate 301A on which the LED is mounted. The LED is mounted on the surface of the front end portion of the substrate 301A. A pair of electrodes 302A is formed on each of the front and back surfaces of the rear end portion of the substrate 301A. Each of the pair of electrodes 302A is electrically connected to the anode and cathode of the LED via the printed wiring of the substrate 301A.

The heat dissipation member 31A has a heat dissipation plate 310A and a connecting portion that thermally connects to the rear surface of the substrate 301A. The heat dissipation plate 310A and the connecting portion are each formed in a rectangular flat plate shape. The heat dissipation member 31A is formed into a roughly L-shape by the heat dissipation plate 310A and the connecting portion. The light-emitting block 3B of the second light source unit A2 has the same configuration as the light-emitting block 3A of the first light source unit A1.

The light guide 5A is formed into a square prism shape from a translucent synthetic resin material such as acrylic resin or polycarbonate resin. However, the shape of the light guide 5A is not limited to a square prism, and may be a square pyramid or a frustum of a square pyramid. Of the two bottom surfaces (left and right bottom surfaces) facing each other in the longitudinal direction (axial direction) of the light guide 5A, one bottom surface (the right bottom surface) serves as the incident surface. Furthermore, of the four side surfaces (front, back, top, and bottom surfaces) of the light guide 5A, one side surface (the bottom surface) serves as the exit surface 51A.

The housing 4A has a front wall 40A, a top wall 41A, a pair of side walls 42A, a storage section 43A, a pair of mounting pieces 46A, a pair of support pieces 47A, etc. The front wall 40A is formed in the shape of a rectangular flat plate. The top wall 41A is formed in the shape of a rectangular flat plate and protrudes rearward from the upper end of the front wall 40A. The pair of side walls 42A are each formed in the shape of a rectangular flat plate and protrude rearward from both left and right ends of the front wall 40A. The upper ends of the pair of side walls 42A are connected to both longitudinal ends of the top wall 41A. In other words, the housing 4A is formed in the shape of a long box with open rear and bottom faces by the front wall 40A, top wall 41A, and pair of side walls 42A.

The storage section 43A is shaped like a long box with the front, bottom, and right side open. The storage section 43A stores the light guide 5A with the incident surface exposed from the right side and the exit surface 51A exposed from the bottom.

A pair of support pieces 47A protrude rearward, one from each end of the upper wall 41A. Furthermore, a pair of mounting pieces 46A protrude rearward, one from each end of the upper wall 41A. However, each mounting piece 46A is positioned more inward than each support piece 47A.

The housing 4B of the second light source unit A2 (see Figure 1B) is a mirror image of the housing 4A of the first light source unit A1. In other words, in the housing 4B of the second light source unit A2, the storage section is reversed left and right from the storage section 43A, and the left and right positions of the mounting sections are opposite to the left and right positions of the mounting sections.

(2-4) Installation Procedure of Display Device Next, the installation procedure of the display device B1 will be described.

First, the worker performing the installation work pulls the power cable 6 through the power hole 15 in the wall above the main body 1 from which the first light source unit A1 and first display block 2A have been removed, and then screws the main body 1 to the ceiling.

Next, the worker inserts each conductor of the two power lines 60 of the power cable 6 pulled in from the power hole 15 into two wire insertion holes provided in the protruding portion 120 of the terminal block 12, electrically connecting the power cable 6 to the terminal block 12.

Then, the worker attaches the first display block 2A to the front of the main body 1.

Finally, the worker hooks the tabs on the tips of the pair of mounting pieces 46A onto the edges of holes in the top surface of the main body 1 and inserts the narrow end of the board 301A (first input portion) into the front opening of the connector portion 7 of the main body 1. This inserts the narrow end of the board 301A between the pair of spring pieces 741 of each of the two first contacts 74A housed in the front half of the housing 70. The pair of spring pieces 741 of the upper first contact 74A make contact with the upper of the two electrodes 302A of the first input portion, establishing electrical continuity. The pair of spring pieces 741 of the lower first contact 74A make contact with the lower of the two electrodes 302A of the first input portion, establishing electrical continuity. In other words, the two first contacts 74A housed in the front half of the housing 70 of the connector portion 7 are electrically connected to the light-emitting portion 30A of the first light source unit A1.

This completes the installation of display device B1.

The narrow end (second input portion) of the circuit board 301B of the second light source unit A2 is inserted into the rear opening of the connector portion 7. The narrow end of the circuit board 301B is inserted between a pair of spring pieces 741 of each of the two second contacts 74B housed in the rear half of the housing 70. The pair of spring pieces 741 of the upper second contact 74B make electrical contact with the upper of the two electrodes 302B of the second input portion. The pair of spring pieces 741 of the lower second contact 74B make electrical contact with the lower of the two electrodes 302B of the second input portion. In other words, the two second contacts 74B housed in the rear half of the housing 70 of the connector portion 7 are electrically connected to the light-emitting portion 30B of the second light source unit A2.

(2-5) Advantages of the Display Device According to the Embodiment As described above, in the display device B1, the electric wires 16 electrically connecting the first light source unit A1 and the second light source unit A2 to the power supply device 11 are supported by the first support portion 17A and the second support portion 17B. Furthermore, because the longitudinal direction of the slits 170B of the second support portion 17B is not parallel to the longitudinal direction of the slits 170A of the first support portion 17A, when an external force is applied to the electric wires 16 in the forward or leftward direction, the electric wires 16 are restricted from moving forward or leftward. As a result, the display device B1 can more reliably support the electric wires 16.

In addition, in display device B1, the opening of slit 170A in first support portion 17A faces the front surface of main body 1, and the opening of slit 170B in second support portion 17B faces the left side surface of main body 1. Therefore, in display device B1, sufficient space is secured around the open ends of each slit 170A, 170B, improving the ease of inserting electric wires 16 into slits 170A, 170B. Moreover, because the width of the open end of each slit 170A, 170B is wider than the width of the closed end, further improving the ease of inserting electric wires 16 into each slit 170A, 170B.

Here, display device B1 has multiple (two) first support portions 17A, which allows it to more reliably support the electric wire 16. Note that while display device B1 has only one second support portion 17B, it may have multiple second support portions 17B. By having multiple second support portions 17B, display device B1 can more reliably support the electric wire 16. Furthermore, in display device B1, the multiple first support portions 17A are adjacent to each other with the second support portion 17B in between, which allows it to more reliably support the electric wire 16.

A slot 100 is provided at the right end of the bottom surface of the main body 1 (see Figure 2). One of the multiple mounting tabs 23 for the second display block 2B is inserted into this slot 100, and the tab 23 is hooked onto the edge of the slot 100 on the inner bottom surface of the main body 1, thereby attaching the second display block 2B to the main body 1 so that it covers the rear surface of the main body 1 (see Figure 3). In other words, because the tab 23 of the second display block 2B is located behind the first support portion 17A and second support portion 17B on the inner bottom surface of the main body 1, there is a possibility that the tab 23 and the electric wire 16 will interfere with each other if the electric wire 16 is supported in a position close to the inner bottom surface of the main body 1.

In display device B1, the closed end (rear end) of slit 170A in first support portion 17A and the closed end of slit 170B in second support portion 17B are positioned in the center of the main body 1 in the front-to-rear direction (see Figures 6 and 7). In other words, first support portion 17A and second support portion 17B support the electric wire 16 at approximately the center of the main body 1 in the front-to-rear direction. Therefore, display device B1 can prevent structures (such as the claws 23 of the second display block 2B) from interfering with the electric wire 16 supported by first support portion 17A and second support portion 17B. As a result, display device B1 can hold the electric wire 16 more securely.

(3) Summary The display device (B1) according to the first aspect of the present disclosure includes a light source unit (A1), a display panel (20A), a power supply device (11), a box-shaped main body (1), and wiring members (electric wires 16). The light source unit (A1) has an input section (substrate 301A, electrodes 302A) to which power for lighting is input. The display panel (20A) is illuminated by the light source unit (A1). The power supply device (11) supplies power for lighting. The main body (1) holds the light source unit (A1), the display panel (20A), and the power supply device (11). The wiring member electrically connects the light source unit (A1) to the power supply device (11) and serves as a power supply path for power for lighting. The light source unit (A1) and the display panel (20A) are held in the main body (1) so as to cover the front surface of the main body (1). The main body (1) has a first support portion (17A) and a second support portion (17B) that support a wiring member. The first support portion (17A) and the second support portion (17B) each have a slit (170A, 170B) that can support a wiring member inserted through an opening at one end in the longitudinal direction. The longitudinal direction of the slit (170A) of the first support portion (17A) is not parallel to the longitudinal direction of the slit (170B) of the second support portion (17B).

In the display device (B1) of the first aspect, the longitudinal direction of the slit (170A) of the first support portion (17A) is not parallel to the longitudinal direction of the slit (170B) of the second support portion (17B), so movement of the wiring member is restricted when an external force is applied to the wiring member. As a result, the display device (B1) of the first aspect can more reliably support the wiring member.

A display device (B1) according to the second aspect of the present disclosure can be realized in combination with the first aspect. In the display device (B1) according to the second aspect, the opening of the slit (170A) in the first support portion (17A) preferably faces the front surface of the main body (1). The opening of the slit (170B) in the second support portion (17B) preferably faces the side surface of the main body (1).

The display device (B1) according to the second aspect ensures sufficient space around the opening ends of each slit (170A, 170B), thereby improving the ease of inserting wiring members into the slits (170A, 170B).

The display device (B1) according to the third aspect of the present disclosure can be realized in combination with the first or second aspect. The display device (B1) according to the third aspect preferably has a plurality of first support portions (17A).

The display device (B1) according to the third aspect can support the wiring member more reliably.

The display device (B1) according to the fourth aspect of the present disclosure can be realized by combining it with any of the first to third aspects. The display device (B1) according to the fourth aspect preferably has a plurality of second support portions (17B).

The display device (B1) according to the fourth aspect can support the wiring member more reliably.

A display device (B1) according to the fifth aspect of the present disclosure can be realized in combination with the third aspect. In the display device (B1) according to the fifth aspect, it is preferable that the multiple first support portions (17A) are adjacent to each other with the second support portion (17B) sandwiched between them.

The display device (B1) according to the fifth aspect can support the wiring member more reliably.

The display device (B1) according to the sixth aspect of the present disclosure can be realized in combination with any of the first to fifth aspects. In the display device (B1) according to the sixth aspect, it is preferable that the closed end of the slit (170A) of the first support portion (17A) is located in the center of the main body (1) in the front-to-rear direction.

The display device (B1) according to the sixth aspect can more reliably support the wiring members by suppressing interference between the wiring members and structures present on the inner bottom surface (rear surface) of the main body (1).

The display device (B1) according to the seventh aspect of the present disclosure can be realized in combination with any of the first to sixth aspects. In the display device (B1) according to the seventh aspect, it is preferable that the closed end of the slit (170B) of the second support portion (17B) is located in the center of the main body (1) in the front-to-rear direction.

The display device (B1) according to the seventh aspect can more reliably support the wiring member by suppressing interference between the wiring member and structures present on the inner bottom surface (rear surface) of the main body (1).

A display device (B1) according to an eighth aspect of the present disclosure can be realized by combining it with any of the first to seventh aspects. In the display device (B1) according to the eighth aspect, it is preferable that the width of the open end of the slit (170A) in the first support portion (17A) and the width of the slit (170B) in the second support portion (17B) are each wider than the width of the closed end.

The display device (B1) according to the eighth aspect can further improve the ease of inserting wiring members into the slits (170A, 170B).

A display device (B1) according to a ninth aspect of the present disclosure can be realized by combining it with any of the first to eighth aspects. The display device (B1) according to the ninth aspect preferably further includes a second light source unit (A2) and a second display panel (20B) in addition to a first light source unit (A1) corresponding to the light source unit and a first display panel (20A) corresponding to the display panel. The second light source unit (A2) is preferably supported by the main body (1) so as to cover the rear surface of the main body (1). The second display panel (20B) is preferably supported by the main body (1) so as to cover the rear surface of the main body (1) and is illuminated by the second light source unit (A2). The wiring member preferably serves as a power supply path from the power supply device (11) to the second light source unit (A2).

The display device (B1) according to the ninth aspect can display information both toward the front and rear of the main body (1).

A1 First light source unit A2 Second light source unit B1 Display device 1 Main body 11 Power supply device 16 Electric wire (wiring member)
17A First support portion 17B Second support portion 20A Display panel 20B Display panel 170A Slit 170B Slit 301A Substrate (input portion)
302A Electrode (input part)

Claims (9)

a light source unit having an input section to which power for lighting is input;
a display panel illuminated by the light source unit;
a power supply device that supplies power for lighting the lighting;
a box-shaped main body that holds the light source unit, the display panel, and the power supply device;
a wiring member that electrically connects the light source unit to the power supply device and serves as a power supply path for the lighting power;
Equipped with
the light source unit and the display panel are held by the main body so as to cover the front surface of the main body;
the main body has a first support portion and a second support portion that support the wiring member,
the first support portion and the second support portion each have a slit capable of supporting the wiring member inserted through an opening at one end in the longitudinal direction,
the first support portion and the second support portion are arranged in the main body so as to be aligned in a straight line,
The longitudinal direction of the slit in the first support portion is not parallel to the longitudinal direction of the slit in the second support portion.
Display device. an opening of the slit of the first support portion faces a front surface of the main body;
The opening of the slit of the second support portion faces a side surface of the main body.
The display device according to claim 1. The first support portion includes a plurality of first support portions.
3. The display device according to claim 1 or 2. The second support portion includes a plurality of second support portions.
The display device according to any one of claims 1 to 3. The first support portions are adjacent to each other with the second support portion interposed therebetween.
The display device according to claim 3. The closed end of the slit of the first support portion is located at the center of the main body in the front-rear direction.
The display device according to any one of claims 1 to 5. The closed end of the slit of the second support portion is located at the center of the main body in the front-rear direction.
The display device according to any one of claims 1 to 6. The slit in the first support portion and the slit in the second support portion each have a width at an open end that is wider than a width at a closed end.
The display device according to any one of claims 1 to 7. In addition to a first light source unit corresponding to the light source unit and a first display panel corresponding to the display panel,
a second light source unit supported by the main body so as to cover a rear surface of the main body;
a second display panel supported by the main body so as to cover a rear surface of the main body and illuminated by the second light source unit;
Further provided with
The wiring member serves as a power supply path from the power supply device to the second light source unit.
The display device according to any one of claims 1 to 8.