Indication device

Abstract

To reduce a load of a worker in construction work.SOLUTION: A display device A1 includes a body 1, a display block 2, and a frame 3. The body 1 is formed in a box-like shape, having an opening 12 on a lower surface, and buried in a ceiling 8. The display block 2 protrudes downward from the ceiling 8 through the opening 12. The frame 3 has a hole 300 through which the display block 2 is inserted and is attached to the body 1 so as to cover the opening 12. The display block 2 has: a display panel 21; a light source part 22 which lights the display panel 21; a holding member 20 which holds the display panel 21 and the light source part 22; and a hook part 23 provided at the holding member 20. The body 1 has a hooked part 13 on which the hook part 23 hooks.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present disclosure relates to a display device, and more specifically, to a display device installed such that a part thereof is embedded in a ceiling.

Background Art

[0002] As a conventional example, the guide light (display device) described in Patent Document 1 is exemplified. The guide light described in Patent Document 1 (hereinafter referred to as the conventional example) includes a main body, a main body cover, a display unit, a light source unit, and the like, and is configured such that the main body is embedded in a ceiling.

[0003] The main body is formed into a box shape with an opening on the lower surface. A lighting unit for lighting the light source unit, a storage battery for supplying emergency power to the lighting unit during a power outage, and the like are housed in the main body.

[0004] The main body cover is formed in a plate shape and attached to the main body so as to cover the lower surface of the main body. An opening through which the upper end of the display unit is inserted is provided in the center of the main body cover. A pair of springs is attached to the main body cover.

[0005] The display unit is attached to the main body cover in a state where the upper end is inserted through the opening. The main body cover is detachably attached to the main body by a pair of springs.

Prior Art Documents

Patent Documents

[0006]

Patent Document 1

Summary of the Invention

Problem to be Solved by the Invention

[0007] Incidentally, in the conventional example described above, the main body cover supports the display unit and is attached to the main body by a pair of springs, so the main body cover is made of metal to ensure mechanical strength. Moreover, because the display unit is attached to the main body cover, the main body cover becomes heavy, placing a heavy burden on the workers performing the installation work.

[0008] The purpose of this disclosure is to provide a display device that can reduce the burden on workers during construction work. [Means for solving the problem]

[0009] A display device according to one aspect of this disclosure comprises a main body, a display block, a frame, Power supply unit, The main body is formed in a box shape with an opening on its lower surface and is embedded in the ceiling. The display block protrudes downward from the ceiling through the opening. The frame is attached to the main body so as to cover the opening and has a hole through which the display block is inserted. The power supply unit is housed within the main body so as to be in contact with the first of a pair of inner surfaces of the main body that are aligned along the longitudinal direction of the opening. The aforementioned display block includes a display panel and The aforementioned power supply unit is lit up The device comprises a light source for illuminating the display panel, a holding member for holding the display panel and the light source, and a hooking portion provided on the holding member. The main body has a hooked portion into which the hooking portion is hooked. The hooked portion protrudes inward from the inner surface of the main body. The hooking portion has a groove into which the hooked portion can be inserted, and is hooked onto the hooked portion when it is inserted into the groove. The opening is formed in a rectangular shape. The longitudinal direction of the groove coincides with the short direction of the opening. One end of the groove in the longitudinal direction is open. The one end of the groove widens outward from the groove. The hooked portion protrudes inward from a pair of inner surfaces of the main body along the shorter direction of the opening. The main body has a space between the second inner surface facing the first inner surface and the hooked portion that is longer than the longitudinal length of the hooked portion. A display device according to one aspect of the present disclosure comprises a main body, a display block, and a frame. The main body is formed in the shape of a box having an opening on its lower surface and is embedded in the ceiling. The display block protrudes downward from the ceiling through the opening. The frame is attached to the main body so as to cover the opening and has a hole through which the display block is inserted. The display block has a display panel, a light source for illuminating the display panel, a holding member for holding the display panel and the light source, and a hooking portion provided on the holding member. The main body has a hooked portion into which the hooking portion is hooked. The hooked portion protrudes inward from the inner surface of the main body. The hooking portion has a groove into which the hooked portion is inserted and is hooked onto the hooked portion when it is inserted into the groove. The hooking portion further has a recess in the middle of the groove into which the hooked portion fits. The opening is formed in the shape of a rectangle. The longitudinal direction of the groove coincides with the short direction of the opening. One end of the groove in the longitudinal direction is open. The one end of the groove widens outwards from the groove. [Effects of the Invention]

[0010] The display device described herein has the effect of reducing the burden on workers during construction work. [Brief explanation of the drawing]

[0011] [Figure 1] Figure 1 is a perspective view of a display device according to an embodiment of this disclosure. [Figure 2] Figure 2 is an exploded perspective view of the same display device. [Figure 3] Figure 3 is a perspective view of the same display device with its frame removed. [Figure 4] Figure 4 is a plan view of the main part of the display block in the display device described above. [Figure 5] Figure 5 is a cross-sectional view of the main part of the display device shown above, before the display block is attached to the main body. [Figure 6] Figure 6 is an exploded perspective view of the same display device, with the display block omitted. [Figure 7] Figure 7 is a perspective view of the display device described above, showing the process of attaching the display block to the main body. [Figure 8] Figure 8 is a perspective view of the display device described above, showing the process of attaching the display block to the main body. [Figure 9] Figure 9 is a cross-sectional view of the main part of the display device described above, with the display block attached to the main body. [Figure 10] Figure 10 is a perspective view of the same display device with the frame removed and the display block moved. [Figure 11] Figure 11 is a perspective view of the display block holding member 20 in a modified example 1 of the display device described above. [Figure 12] Figure 12 is a perspective view of the main body of the display device according to the modified example 1 shown above. [Figure 13] Figure 13 is a partially omitted cross-sectional view of the display device of the modified example 1 described above, showing the hooked portion hooked onto the hooked portion. [Figure 14] Figure 14 is a perspective view of the display block holding member 20 in a modified example 2 of the display device described above. [Figure 15] Figure 15 is a perspective view of the main body of the display device in the modified example 2 shown above. [Figure 16]Fig. 16 is a partially omitted cross-sectional view showing a state where the hooking portion is hooked on the hooked portion in the display device of Modification 2 described above. Description of Embodiments

[0012] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings. However, each drawing described in the following embodiments is a schematic diagram, and the ratios of the size and thickness of each component do not necessarily reflect actual dimensional ratios. It should be noted 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 can be made according to design and the like as long as the effects of the present disclosure can be achieved.

[0013] (1) Overview A display device A1 according to the embodiment includes a main body 1, a display block 2, and a frame 3 (see Figs. 1 and 2).

[0014] The main body 1 is formed in a box shape having an opening 12 on a lower surface thereof. The main body 1 is embedded in a ceiling 8 through an embedding hole 80 provided in the ceiling 8. The display block 2 protrudes downward from the ceiling 8 through the opening 12 of the main body 1. The frame 3 has a hole 300 through which the display block 2 is inserted. The frame 3 is attached to the main body 1 so as to cover the opening 12 with the display block 2 inserted through the hole 300 (see Fig. 1).

[0015] The display block 2 includes a display panel 21, a light source unit 22 that illuminates the display panel 21, a holding member 20 that holds the display panel 21 and the light source unit 22, and a hooking portion 23 provided on the holding member 20 (see Fig. 2). The main body 1 has a hooked portion 13 on which the hooking portion 23 is hooked.

[0016] However, in the display device A1 according to this embodiment, the display block 2 is attached to the main body 1 by hooking the hook portion 23 provided on the holding member 20 onto the hooked portion 13. In other words, in the display device A1 according to this embodiment, the display block 2 is attached to the main body 1 by itself, rather than the display block 2 and frame 3 being attached together as one unit, as in the conventional example. Therefore, the display device A1 according to this embodiment has the advantage of reducing the burden on workers during construction work.

[0017] (2) Details of the display device according to the embodiment The display device A1 according to this embodiment (hereinafter abbreviated as display device A1) will be described in detail with reference to the drawings. The display device A1 described below is an emergency exit light installed on the ceiling of an emergency exit or passage to an emergency exit in a building such as an office or store to guide people to safety. However, the display device according to this embodiment is not limited to an emergency exit light 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 and down, front and back, and left and right directions indicated by arrows in Figure 1 are defined as the up and down, front and back, and left and right directions of the display device A1.

[0018] Display device A1 comprises a main unit 1, a display block 2, and a frame 3 (see Figures 1 and 2).

[0019] (2-1) Display Block The display block 2 includes a display panel 21, a light source unit 22, a holding member 20, and a light guide plate (see Figure 2).

[0020] The display panel 21 is formed in the shape of a rectangular flat plate from a translucent synthetic resin such as acrylic resin or polycarbonate resin. However, the display panel 21 may also be formed from a translucent material other than synthetic resin, such as quartz glass. Pictograms for evacuation guidance are displayed on the display surface of the display panel 21 (see Figures 1 and 2).

[0021] The light guide plate is formed in the shape of a rectangular flat plate from a translucent synthetic resin such as acrylic resin or polycarbonate resin. The light guide plate is positioned behind the display panel 21 so that its front surface faces the rear surface of the display panel 21. Light emitted from the light source unit 22 is incident on the upper surface (incident surface) of the light guide plate. The light incident from the incident surface is guided through the light guide plate and emitted from the front surface (exit surface) of the light guide plate. The display panel 21 is then illuminated from behind by the light emitted from the exit surface of the light guide plate.

[0022] The light source unit 22 includes an LED, a light guide that guides the light emitted from the LED, and a housing 220 that houses the LED and the light guide (see Figure 2). The housing 220 is made of a non-transparent synthetic resin (for example, a white-colored polycarbonate resin) and is formed in the shape of a long box with an open bottom. The LED is mounted on a substrate and housed in one end (left end) of the housing 220 in the longitudinal direction. The light guide is formed in the shape of a long rectangular prism and is housed in the housing 220 with one end face (left end) in the longitudinal direction facing the LED and the side (bottom) along the longitudinal direction facing the opening in the bottom of the housing 220. In other words, the light emitted from the LED enters the light guide from the left end of the light guide, is guided through the light guide, and then exits from the bottom surface of the light guide.

[0023] The retaining member 20 has a first retaining portion 201 and a second retaining portion 202. The first retaining portion 201 and the second retaining portion 202 are integrally formed from a synthetic resin that does not transmit light (for example, a white-colored polycarbonate resin).

[0024] The first holding section 201 is formed in the shape of a rectangular box with its front and top surfaces open. The first holding section 201 holds the display panel 21 and the light guide plate by positioning the display panel 21 in front of the light guide plate (see Figure 2).

[0025] The second retaining portion 202 is positioned at the upper end of the first retaining portion 201. The second retaining portion 202 is formed in the shape of a long rectangular tube with its top and bottom surfaces open. The second retaining portion 202 has a front wall 203 and a rear wall 204, the height of which is partially increased in the central part in the longitudinal direction (left-right direction), and two hooking portions 23 that connect the longitudinal ends of the front wall 203 and the rear wall 204 (see Figures 2 and 3). A rectangular cylindrical portion 205 with its top and front surfaces open is provided in the center of the longitudinal direction of the rear wall 204. The cylindrical portion 205 protrudes rearward from the rear surface of the rear wall 204 (see Figure 3).

[0026] The two hook portions 23 are formed to be the same shape and size. The hook portions 23 are formed in a quadrangular prism shape and protrude to the outside of the first holding portion 201 in both the front-to-back and left-to-right directions (see Figures 3 and 4). The upper surface of the hook portion 23 is inclined downward at both ends in the longitudinal direction (front-to-back direction) (see Figure 4).

[0027] A groove 230 is provided on the side surface of the hook portion 23 (the left side of the left hook portion 23 and the right side of the right hook portion 23; the same applies hereinafter), with the front-to-back direction as its longitudinal direction. Both ends of the groove 230 in the longitudinal direction (front-to-back direction) are open (see Figure 4). The upper surface 231 of the groove 230 is flat (planar) except for the ends in the longitudinal direction. However, the ends in the longitudinal direction of the upper surface 231 are inclined surfaces that slope upward toward the outside of the groove 230 (see Figure 4). The entire upper surface 231 of the groove 230 may also be an inclined surface.

[0028] On the other hand, the lower surface 232 of the groove 230 slopes downward from the center in the longitudinal direction toward both ends in the longitudinal direction. In other words, both ends of the groove 230 in the longitudinal direction widen toward the outside of the groove 230 (the width in the short direction widens).

[0029] The second holding section 202 houses and holds the light source section 22 in a housing surrounded by a front wall 203, a rear wall 204, and two hooking sections 23 (see Figures 2 and 3). When the light source section 22 is held in the second holding section 202, the lower surface of the light guide of the light source section 22 and the upper surface (incident surface) of the light guide plate face each other in the vertical direction. Therefore, almost all of the light emitted from the lower surface of the light guide of the light source section 22 enters the light guide plate from the incident surface of the light guide plate. The light that enters the light guide plate travels through the light guide plate, undergoes total internal reflection on the rear inner surface of the first holding section 201, and is emitted forward from the front surface (exit surface) of the light guide plate to illuminate the display panel 21. A connector section 206 to which a plug connector 42 is detachably connected is provided at one end (left end) in the longitudinal direction of the housing 220 of the light source section 22 (see Figure 2). The plug connector 42 is electrically connected to the power block 40 of the power supply unit 4, which will be described later, via the wire 43. In other words, the light source unit 22 is lit by DC power supplied from the power block 40 through the circuit including the wire 43, the plug connector 42, and the connector unit 206.

[0030] (2-2) Main body The main body 1 has a rectangular top plate 10 and four side plates that protrude downward from each of the four sides of the top plate 10, and is formed in a box shape with an open bottom (see Figures 2 and 3).

[0031] The front side panel (first side panel 11A) and the rear side panel (second side panel 11B) of the main body 1 are each formed in the shape of a rectangular flat plate. However, the upper part of the second side panel 11B, from around the center in the vertical direction, is inclined forward in the upward direction (see Figure 3).

[0032] The left side plate (third side plate 11C) and the right side plate (fourth side plate 11D) of the main body 1 are each formed in the shape of a pentagonal flat plate. The lower ends of these four side plates (first side plate 11A, second side plate 11B, third side plate 11C, and fourth side plate 11D) are each bent outwards away from the opening 12 on the bottom surface (see Figure 2). The top plate 10, first side plate 11A, second side plate 11B, third side plate 11C, and fourth side plate 11D are integrally formed by punching and bending metal plates such as galvanized steel. However, the main body 1 may be formed from metal materials other than galvanized steel, or from non-metallic materials such as synthetic resin.

[0033] A power supply unit 4 is mounted on the inner surface of the first side plate 11A (see Figure 2). The power supply unit 4 has a power supply block 40 and a storage battery 41 (see Figures 2 and 3). The power supply block 40 lights the light source 22 with normal power supplied from the normal power supply (such as commercial AC power) and emergency power supplied from the storage battery 41. The power supply block 40 also charges the storage battery 41 with normal power. The storage battery 41 supplies emergency power to the power supply block 40 in the event of a power outage of the normal power supply. The storage battery 41 is also detachably (replaceable) attached to the power supply block 40. Note that "emergency power supplied by the storage battery 41" refers to DC power discharged from the storage battery 41.

[0034] A square hole 111 is provided at the top of the second side plate 11B. The power cable, which serves as the power supply path for the normal power supply, is routed into the main body 1 through the square hole 111. The power cable is electrically connected to the power block 40 via a terminal block provided on the power supply unit 4.

[0035] Furthermore, a positioning portion 16 and a screw fastening piece 110 are provided at the center of the longitudinal direction (left-right direction) on the inner surface of the second side plate 11B (see Figure 2).

[0036] The positioning portion 16 is formed in the shape of a rectangular flat plate. A round hole 160 is provided at the tip of the positioning portion 16. The round hole 160 penetrates the positioning portion 16 in the thickness direction (vertical direction). The positioning portion 16 is formed by cutting and bending a part of the second side plate 11B, but it may also be formed separately from the second side plate 11B and fixed to the second side plate 11B by welding, screwing, or other appropriate methods.

[0037] The screw fastening piece 110 is formed in the shape of a rectangular flat plate. The screw fastening piece 110 is located above the positioning part 16. A screw hole 1100 is provided at the tip of the screw fastening piece 110. The screw hole 1100 penetrates the screw fastening piece 110 in the thickness direction (vertical direction). Note that, when viewed from below, the screw hole 1100 is located inside the round hole 160 of the positioning part 16. The screw fastening piece 110 is formed by cutting and bending a part of the second side plate 11B, but it may also be formed separately from the second side plate 11B and fixed to the second side plate 11B by welding, screwing, or other appropriate methods.

[0038] The threaded portion 172 of the thumb screw 17 is screwed into the threaded hole 1100 of the screw fastening piece 110. The thumb screw 17 has a head 170, a shaft 171, and a threaded portion 172 (see Figure 2). The head 170 is formed in a cylindrical shape that is large enough to be grasped by a person's fingers. The shaft 171 is formed in a cylindrical shape that is sufficiently longer than the vertical distance between the screw fastening piece 110 and the positioning part 16. The threaded portion 172 is formed to be sufficiently shorter than the shaft 171 and longer than the thickness of the screw fastening piece 110. The thumb screw 17 is inserted into the round hole 160 of the positioning part 16 from below the main body 1, and the threaded portion 172 is screwed into the threaded hole 1100 of the screw fastening piece 110 to attach it to the main body 1 (see Figure 3).

[0039] A hook portion 13 is provided at the center of the longitudinal direction (front-to-back direction) on the inner surface of each of the third side plate 11C and the fourth side plate 11D (see Figure 2). The hook portion 13 is formed in the shape of a rectangular flat plate with the front-to-back direction as its longitudinal direction (see Figure 5). The hook portion 13 is formed by cutting and bending a part of the third side plate 11C and the fourth side plate 11D inward (see Figure 5). The longitudinal length of the hook portion 13 is approximately equal to the longitudinal length of the hook portion 23 of the display block 2, and the thickness (width in the vertical direction) of the hook portion 13 is smaller than the width of the groove 230 of the hook portion 23.

[0040] Furthermore, one guide portion 14 and one stopper portion 15 are provided on the inner surface of each of the third side plate 11C and the fourth side plate 11D (see Figures 2 and 5).

[0041] The guide portion 14 is formed in the shape of a rectangular flat plate with its longitudinal direction in the front-to-back direction (see Figure 5). The guide portion 14 is formed by cutting and bending inward a portion of the third side plate 11C and the fourth side plate 11D. The guide portion 14 is located behind the hooked portion 13 and is positioned higher than the hooked portion 13.

[0042] The stopper portion 15 is formed in the shape of a rectangular flat plate with the left-right direction as its longitudinal direction (see Figure 5). The stopper portion 15 is formed by cutting and bending inward a portion of the third side plate 11C and the fourth side plate 11D. The stopper portion 15 is located in front of the hooked portion 13 and at a lower position than the hooked portion 13.

[0043] Furthermore, the third side plate 11C and the fourth side plate 11D are each provided with a mounting portion 112 for attaching the mounting spring 5 (see Figures 3 and 6). Each mounting portion 112 has a pair of insertion pieces 113 and a pair of projections 114. The pair of insertion pieces 113 are formed in an L-shape when viewed from above. The pair of insertion pieces 113 face each other with a gap in the front-rear direction on the outer surfaces of the third side plate 11C and the fourth side plate 11D. The pair of insertion pieces 113 are formed by cutting and bending a portion of the third side plate 11C and the fourth side plate 11D (a portion located above the hooked portion 13). The pair of projections 114 protrude from the outer surfaces of the third side plate 11C and the fourth side plate 11D above the pair of insertion pieces 113. The pair of projections 114 are formed by cutting and bending a portion of the third side plate 11C and the fourth side plate 11D.

[0044] The mounting spring 5 has a spring piece 50, a mounting piece 51, a retaining piece 52, and a locking claw 53 (see Figures 3, 5, and 6). The spring piece 50, mounting piece 51, retaining piece 52, and locking claw 53 are integrally formed from a metal suitable for the spring material, such as stainless steel.

[0045] The spring piece 50 is formed in the shape of a long strip. The mounting piece 51 is formed in the shape of a rectangle. The retaining piece 52 is formed in the shape of a rectangle that is narrower than the mounting piece 51 and is connected to the mounting piece 51 and the spring piece 50, respectively. However, the lower end of the retaining piece 52 connected to the spring piece 50 is curved in the shape of a U. The locking claw 53 is formed in the shape of a hook by cutting out a part of the mounting piece 51.

[0046] The retaining piece 52 is inserted between a pair of insertion pieces 113 from top to bottom along the outer surface of the third side plate 11C (fourth side plate 11D). When the mounting piece 51 overcomes the pair of projections 114, the upper end of the mounting piece 51 catches on the lower end of the pair of projections 114 (see Figure 6). As a result, the mounting spring 5 is attached to the respective mounting portions 112 of the third side plate 11C and the fourth side plate 11D (see Figures 2 and 3).

[0047] (2-3) slots Frame 3 has a bottom wall 30, a peripheral wall 31, and four mounting parts 32 (see Figures 2 and 6). The bottom wall 30, peripheral wall 31, and four mounting parts 32 are integrally formed from synthetic resin (for example, polycarbonate resin).

[0048] A hole 300 is opened in the center of the bottom wall 30. The hole 300 is a rectangular corner hole, and its longitudinal direction coincides with the longitudinal direction of the bottom wall 30. The peripheral wall 31 is formed in a rectangular tubular shape that protrudes upward from the periphery of the bottom wall 30 all around. Four mounting parts 32 are provided at the four corners of the upper surface of the bottom wall 30. Each mounting part 32 has a support piece 320 that protrudes upward from the upper surface of the bottom wall 30, and a claw 321 that protrudes outward from the tip of the support piece 320 along the longitudinal direction of the bottom wall 30 (see Figure 6). The claw 321 is formed in a triangular prism shape with its axial direction coinciding with the front-rear direction.

[0049] Here, mounting holes 115, which are rectangular holes, are provided at the lower part of both the front and rear ends of the third side plate 11C and the fourth side plate 11D of the main body 1 (see Figure 6). When the claws 321 of the four mounting parts 32 are inserted one by one into these four mounting holes 115, the claws 321 hook onto the lower edges of the mounting holes 115 of the third side plate 11C and the fourth side plate 11D. As a result, the frame 3 is detachably attached to the main body 1 by the four mounting parts 32 (see Figure 1).

[0050] (2-4) Installation procedure for the display device Next, we will explain the installation procedure for display device A1. However, the procedure described below is just one example, and the order of some of the tasks may be changed.

[0051] First, the worker performing the installation connects the power wires pulled out from the recessed hole 80 in the ceiling 8 to the terminal block of the power unit 4, and then inserts the main body 1 into the recessed hole 80 in the ceiling 8 while pressing the two mounting springs 5 ​​against the third side plate 11C and the fourth side plate 11D of the main body 1. The main body 1 inserted into the recessed hole 80 is attached to the ceiling 8 by sandwiching the edge of the recessed hole 80 in the ceiling 8 from above and below with the two mounting springs 5 ​​and the bent portions from the lower ends of the four side plates of the main body 1.

[0052] Next, the worker removes the thumb screw 17 that is screwed into the screw hole 1100 of the screw fastening piece 110 of the main body 1. At this point, a space 18 is formed between the inner surface of the second side plate 11B of the main body 1 and the hooked portion 13, the length in the front-to-back direction being longer than the length in the longitudinal direction of the hooked portion 23 (see Figures 7 and 8). Therefore, the worker can insert the upper part of the display block 2 (the second holding portion 202 and the hooked portion 23) into this space 18 through the opening 12.

[0053] The worker connects the plug connector 42 of the power supply unit 4 to the connector part 206. Then, the worker inserts the upper part of the display block 2 (the second holding part 202 and the hook part 23) into the space 18 by fitting the positioning part 16 provided on the second side plate 11B into the cylindrical part 205 of the second holding part 202. At this time, the worker pushes up the display block 2 until the two hook parts 23 hit the guide parts 14 that protrude into the space 18 from the inner surfaces of the third side plate 11C and the fourth side plate 11D (see Figure 5).

[0054] Next, the worker moves the display block 2 forward with the two hooking parts 23 each in contact with the guide part 14 (see Figure 10). This causes the hooked parts 13 to be inserted into the grooves 230 of the two hooking parts 23 (see Figure 9). The worker moves the display block 2 forward until the front ends of the two hooking parts 23 contact the stopper parts 15 that protrude from the inner surfaces of the third side plate 11C and the fourth side plate 11D (see Figure 9). When the worker releases their hand from the display block 2, the two hooked parts 13 each come into contact with the upper surface 231 of the grooves 230 of the two hooking parts 23, and each hooking part 23 hooks onto each hooked part 13, attaching the display block 2 to the main body 1. Note that the inner surfaces of the third side plate 11C and the fourth side plate 11D are provided with projections 116 that protrude above the hooking parts 23 (see Figure 9). Therefore, even if the display block 2 moves upward due to earthquake tremors or other reasons, the projection 116 will hit the upper surface of the hook portion 23, restricting the upward movement of the display block 2, thus suppressing the occurrence of malfunctions such as damage to the hook portion 23.

[0055] Next, the worker attaches the thumb screw 17 to the main body 1 by passing the shaft portion 171 through the round hole 160 of the positioning portion 16 and screwing the threaded portion 172 into the threaded hole 1100 of the screw fastening piece 110. The head 170 of the thumb screw 17 attached to the main body 1 is positioned between the cylindrical portion 205 and the second side plate 11B. As a result, even if the display block 2 tries to move backward inside the main body 1, the cylindrical portion 205 comes into contact with the head 170 of the thumb screw 17, restricting the backward movement of the display block 2 (see Figure 10), so that the hooking portion 23 and the hooked portion 13 do not come loose.

[0056] Finally, the worker inserts the display block 2 through the hole 300 and presses the frame 3 against the lower end of the main body 1. Then, the claws 321 of the four mounting parts 32 of the frame 3 hook onto the lower edges of the mounting holes 115 of the third side plate 11C and the fourth side plate 11D. As a result, the frame 3 is attached to the main body 1 by the four mounting parts 32 (see Figure 1).

[0057] Following the above procedure, the display device A1 is installed on the ceiling 8 and the installation work is completed.

[0058] (3) Modified display device according to the embodiment Next, several modifications of the display device A1 according to the embodiment will be described. However, each of the modified display device A1 described below is characterized by the hooking portion of the display block 2 and the hooked portion of the main body 1, while the other configurations are common to the display device A1 according to the embodiment. Therefore, in the description of each of the modified display device A1 below, components common to the display device A1 according to the embodiment will be denoted by the same reference numerals, and their illustration and description will be omitted as appropriate.

[0059] (3-1) Variation 1 In the modified example A1, the groove 230A of the hook portion 23 provided on the holding member 20 is formed in a wave shape with peaks at both ends and the center in the longitudinal direction (front-to-back direction), and valleys between both ends and the center in the longitudinal direction (see Figures 11 and 13). A recess 233 is provided on the upper surface 231A of the peak portion in the center in the front-to-back direction of the groove 230A.

[0060] On the other hand, in the modified example 1, the hooked portion 13 is formed in a cylindrical shape that protrudes from the inner surfaces of the third side plate 11C and the fourth side plate 11D of the main body 1 (see Figure 12). The hooked portion 13 may also be composed of the shaft portion of a screw attached to the third side plate 11C and the fourth side plate 11D.

[0061] However, in the modified example 1, the display block 2 is attached to the main body 1 by inserting the hooking portion 13 from the front end of the groove 230A and fitting the hooking portion 13 into the recess 233 provided in the center of the groove 230A in the front-rear direction, thereby hooking the hooking portion 23 onto the hooking portion 13 (see Figure 13).

[0062] (3-2) Modification example 2 In the display device A1 of Modified Example 2, the groove 230B of the hook portion 23 provided on the holding member 20 has a recess 233 in the center of its upper side surface 231B in the longitudinal direction (front-to-back direction) (see Figures 14 and 16). On the other hand, the hooked portion 13 in Modified Example 2 is formed in the same way as the hook portion 23 in the embodiment, with the front-to-back direction as its longitudinal direction (see Figure 15). The hooked portion 13 is formed by cutting and bending inward a part of the third side plate 11C and the fourth side plate 11D (see Figure 15). The length of the hooked portion 13 in the longitudinal direction is shorter than the length of the recess 233 provided in the groove 230B of the hook portion 23 in the longitudinal direction.

[0063] However, in the modified example 2, the display block 2 is attached to the main body 1 by inserting the hooking portion 13 from the front end of the groove 230B and fitting the hooking portion 13 into the recess 233 in the center of the groove 230B in the front-rear direction, thereby hooking the hooking portion 23 onto the hooking portion 13 (see Figure 16).

[0064] (4) Advantages of the embodiment As described above, in the display device A1, the display block 2 is attached to the main body 1 by hooking the hook portion 23 provided on the holding member 20 onto the hooked portion 13 provided on the main body 1. Therefore, when attaching the display block 2 to the main body 1, the worker only needs to hold the display block 2 in their hand and attach it to the main body 1. Thus, the display device A1 can reduce the burden on the worker during installation work compared to the case in the conventional example where a display block with a frame is attached to the main body. In the display device A1, the display panel 21 is arranged only on the front of the first holding portion 201 of the display block 2, but the display panel 21 may be arranged on both the front and rear of the first holding portion 201.

[0065] Furthermore, in the display device A1, the hooked portion 13 of the main body 1 is inserted into the grooves 230;230A;230B of the hooked portion 23, and the display block 2 is attached to the main body 1 by hooking the hooked portion 23 onto the hooked portion 13 while it is inserted into the grooves 230;230A;230B. Therefore, the display device A1 can further reduce the burden on workers during construction work by improving the workability of the process of hooking the hooked portion 23 onto the hooked portion 13.

[0066] Furthermore, the display device A1 has a rectangular opening 12 in the main body 1, with the longitudinal direction of the grooves 230;230A;230B aligned with the short direction of the opening 12, and one end of the longitudinal direction of the grooves 230;230A;230B open. In other words, the display device A1 allows the hooked portion 13 to be inserted into the grooves 230;230A;230B of the hooked portion 23 by moving the display block 2 along the short direction of the opening 12 relative to the main body 1. Therefore, the display device A1 can further reduce the burden on workers during construction work by improving the workability of the work of hooking the hooked portion 23 onto the hooked portion 13.

[0067] Here, one end of the groove 230 widens outwards (see Figure 4). In this embodiment, "widening" means that the width of the groove 230 in the short direction (vertical direction) widens outwards. As a result, the display device A1 can easily insert the hooked portion 13 from the widened end of the groove 230, thereby further reducing the burden on workers during construction work.

[0068] Furthermore, in the display device A1, the main body 1 has a guide part 14 that guides the hooking part 23 so as to draw the hooking part 13 into the groove 230;230B from one end (see Figure 5). In other words, in the display device A1, when the display block 2 is moved forward with the hooking part 23 in contact with the guide part 14 provided on the main body 1 (see Figure 10), the hooking part 13 is smoothly inserted into the groove 230;230B of the hooking part 23 (see Figure 9). Therefore, by guiding the hooking part 23 with the guide part 14, the display device A1 can smoothly insert the hooking part 13 from one end of the groove 230;230B, further reducing the burden on workers during construction work.

[0069] Furthermore, in the display device A1, the main body 1 has a stopper portion 15 that faces the hook portion 23 so as to be in contact with the hook portion 23 along the insertion direction (forward direction) of the hook portion 23 (see Figure 9). Thus, the display device A1 can prevent the display block 2 from moving more than necessary by applying the stopper portion 15 provided on the main body 1 to the hook portion 23. Therefore, by restricting the movement of the display block 2 with the stopper portion 15, the display device A1 can prevent the display block 2 from moving too far relative to the main body 1, thereby further reducing the burden on workers during construction work.

[0070] In the display device A1, the main body 1 has a power supply unit 4 attached to the inner surface of the first side plate 11A. The main body 1 has a space 18 between the inner surface of the second side plate 11B, which faces the first side plate 11A in the front-rear direction, and the hooked portion 13, which is longer than the length of the hooked portion 23 in the longitudinal direction (front-rear direction). Therefore, the upper part of the display block 2 (the second holding portion 202 and the hooked portion 23) of the display device A1 can be inserted into the space 18 through the opening 12 of the main body 1. The display device A1 can then move the display block 2 inserted into the space 18 forward of the main body 1 to hook the hooked portion 23 onto the hooked portion 13. Thus, by securing sufficient space (space 18) within the main body 1 for the movement of the display block 2, the display device A1 can further reduce the burden on workers during construction work.

[0071] Furthermore, in the display device A1, the main body 1 has a positioning part 16 that positions the display block 2 relative to the longitudinal direction of the opening 12 when a part of the display block 2 is inserted into the space 18 (see Figure 7). Thus, when the upper part of the display block 2 (the second holding part 202 and the hooking part 23) is inserted into the space 18, the display device A1 can position the display block 2 relative to the longitudinal direction of the opening 12 by the positioning part 16 provided on the main body 1. Therefore, the display device A1 can further reduce the burden on workers during construction work.

[0072] Furthermore, in the display device A1, the main body 1 has a restricting part (thumb screw 17) that restricts the movement of the display block 2 in the direction that the hooking part 23 detaches from the hooked part 13 (rearward direction) in the space 18 (see Figure 10). However, when the thumb screw 17 is removed from the positioning part 16 (see Figure 8), the display block 2 can be inserted into the space 18 of the main body 1. On the other hand, when the thumb screw 17 is attached to the positioning part 16 (see Figure 10), the head 170 of the thumb screw 17 comes into contact with the cylindrical part 205, restricting the movement of the display block 2 in the rearward direction. Therefore, the display device A1 can restrict the movement of the display block 2 with the thumb screw 17 which is detachably attached to the positioning part 16, and prevent the display block 2 from falling from the main body 1. Furthermore, since the thumb screw 17 of the display device A1 is detachable from the positioning part 16, the thumb screw 17 does not get in the way when attaching the display block 2 to the main body 1 by removing the thumb screw 17 from the positioning part 16.

[0073] Furthermore, the display device A1 of the modified examples 1 and 2 has a recess 233 in the middle of the grooves 230A;230B of the hooking portion 23 into which the hooked portion 13 fits (see Figures 13 and 16). The display device A1 of the modified examples 1 and 2 can position the display block 2 in the short-side direction (front-to-back direction) of the main body 1 by fitting the hooked portion 13 into the recess 233.

[0074] Incidentally, the display device A1 is further equipped with two mounting springs 5 ​​that protrude from the outer surface of the main body 1 and attach the main body 1 to the ceiling 8. These two mounting springs 5 ​​are located above the hooked portion 13 on the outer surfaces of the third side plate 11C and the fourth side plate 11D of the main body 1 (see Figure 6). Therefore, by providing the hooked portion 13 in the dead space on the outer surfaces of the third side plate 11C and the fourth side plate 11D of the main body 1, the display device A1 can suppress the enlargement of the display block 2 (holding member 20).

[0075] (5) Summary A display device (A1) according to a first aspect of the present disclosure comprises a main body (1), a display block (2), and a frame (3). The main body (1) is formed in the shape of a box having an opening (12) on its lower surface and is embedded in a ceiling (8). The display block (2) protrudes downward from the ceiling (8) through the opening (12). The frame (3) is attached to the main body (1) so as to cover the opening (12) and has a hole (300) through which the display block (2) is inserted. The display block (2) comprises a display panel (21), a light source unit (22) that illuminates the display panel (21), a holding member (20) that holds the display panel (21) and the light source unit (22), and a hooking portion (23) provided on the holding member (20). The main body (1) has a hooked portion (13) to which the hooking portion (23) is hooked.

[0076] The display device (A1) according to the first embodiment can reduce the burden on workers during construction work compared to the case in which a display block with a frame is attached to the main body, as in the conventional example.

[0077] A display device (A1) according to a second aspect of this disclosure can be realized by combining it with the first aspect. In the display device (A1) according to the second aspect, the hooked portion (13) preferably protrudes inward from the inner surface of the main body (1). The hooked portion (23) preferably has grooves (230; 230A; 230B) into which the hooked portion (13) can be inserted. The hooked portion (13) is preferably hooked onto the hooked portion (13) when it is inserted into the grooves (230; 230A; 230B).

[0078] The display device (A1) according to the second embodiment can further reduce the burden on workers during construction work by improving the workability of the work of hooking the hooking part (23) onto the hooked part (13).

[0079] A display device (A1) according to a third aspect of this disclosure can be realized by combining it with the second aspect. In the display device (A1) according to the third aspect, the opening (12) is preferably formed in a rectangular shape. The longitudinal direction of the groove (230; 230A; 230B) is preferably the same as the short direction of the opening (12). It is preferable that one end of the longitudinal direction of the groove (230; 230A; 230B) is open.

[0080] The display device (A1) according to the third embodiment can further reduce the burden on workers during construction work by improving the workability of the work of hooking the hooking part (23) onto the hooked part (13).

[0081] A display device (A1) according to a fourth aspect of this disclosure can be realized by combining it with a third aspect. In the display device (A1) according to the fourth aspect, it is preferable that one end of the groove (230) widens outward from the groove (230).

[0082] The display device (A1) according to the fourth embodiment makes it easier to insert the hooked portion (13) from one end of the widened groove (230), thereby further reducing the burden on workers during construction work.

[0083] A display device (A1) according to a fifth aspect of the present disclosure can be realized in combination with a third or fourth aspect. In the display device (A1) according to the fifth aspect, the main body (1) preferably has a guide portion (14) that guides the hook portion (23) so as to draw the hook portion (13) into a groove (230; 230B) from one end.

[0084] The display device (A1) according to the fifth embodiment allows the hooked portion (13) to be smoothly inserted from one end of the groove (230; 230B) by guiding the hooked portion (23) with the guide portion (14), thereby further reducing the burden on workers during construction work.

[0085] A display device (A1) according to a sixth aspect of this disclosure can be realized in combination with a third or fourth aspect. In the display device (A1) according to the sixth aspect, the main body (1) preferably has a stopper portion (15) that is in contact with the hook portion (23) along the insertion direction of the hook portion (23).

[0086] The display device (A1) according to the sixth embodiment can prevent the display block (2) from moving too far relative to the main body (1) by restricting the movement of the display block (2) with a stopper part (15), thereby further reducing the burden on workers during construction work.

[0087] A display device (A1) according to a seventh aspect of this disclosure can be realized by combination with any of the first to sixth aspects. The display device (A1) according to the seventh aspect preferably further comprises a power supply unit (4) for lighting a light source unit (22). The hooked portion (13) preferably protrudes inward from a pair of inner surfaces of the main body (1) along the short direction of the opening (12). The power supply unit (4) is preferably housed in the main body (1) so as to be in contact with the first inner surface (inner surface of the first side plate 11A) of the pair of inner surfaces of the main body (1) along the longitudinal direction of the opening (12). The main body (1) preferably has a space (18) between the second inner surface (inner surface of the second side plate 11B) facing the first inner surface and the hooked portion (13) that is longer than the longitudinal length of the hooked portion (23).

[0088] The seventh embodiment of the display device (A1) can further reduce the burden on workers during construction work by ensuring sufficient space (18) within the main body (1) for the movement of the display block (2).

[0089] A display device (A1) according to the eighth aspect of this disclosure can be realized in combination with the seventh aspect. In the display device (A1) according to the eighth aspect, the main body (1) preferably has a positioning part (16) that positions the display block (2) with respect to the longitudinal direction of the opening (12) when a part of the display block (2) is inserted into the space (18).

[0090] The display device (A1) according to the eighth embodiment can further reduce the burden on workers during construction work.

[0091] A display device (A1) according to the ninth aspect of this disclosure can be realized in combination with the eighth aspect. In the display device (A1) according to the ninth aspect, the main body (1) preferably has a restricting part (thumb screw 17) that restricts the movement of the display block (2) in the space (18) in a direction that causes the hooking part (23) to detach from the hooked part (13). The restricting part is preferably detachably attached to the positioning part (16). The restricting part is preferably attached to the positioning part (16) to restrict the movement of the display block (2).

[0092] The display device (A1) according to the ninth embodiment restricts the movement of the display block (2) with a restricting part, preventing the display block (2) from falling from the main body (1). Moreover, since the restricting part of the display device (A1) according to the ninth embodiment is detachable from the positioning part (16), the restricting part does not get in the way when attaching the display block (2) to the main body (1) by removing the restricting part from the positioning part (16).

[0093] A display device (A1) according to the tenth aspect of this disclosure can be realized in combination with any of the first to ninth aspects. In the display device (A1) according to the tenth aspect, the hooking portion (23) preferably has a recess (233) in the middle of the groove (230A; 230B) into which the hooked portion (13) fits.

[0094] The display device (A1) according to the tenth embodiment allows for the positioning of the display block (2) in the short-side direction (front-to-back direction) of the main body (1) by fitting the hooked portion (13) into the recess (233).

[0095] A display device (A1) according to the eleventh aspect of this disclosure can be realized in combination with any of the first to tenth aspects. Preferably, the display device (A1) according to the eleventh aspect further comprises a mounting spring (5) that protrudes from the outer surface of the main body (1) and is used to attach the main body (1) to the ceiling (8). Preferably, the mounting spring (5) is located on the outer surface of the main body (1) above the hooked portion (13).

[0096] The display device (A1) according to the eleventh embodiment can suppress the increase in size of the main body (1) by providing a hooking portion (13) in the dead space on the outer surface of the main body (1). [Explanation of Symbols]

[0097] A1 Display device 1 Main unit 2 Display Blocks Slot 3 4 Power supply unit 5. Mounting spring 8 Ceiling 12 Openings 13 Hooked part 14 Information Department 15 Stopper section 16 Positioning section 17 Thumb screw (regulating part) 18 Space 20 Retaining member 21 Display Panel 22 Light source section 23 Hook part 230;230A;230B Groove 233 recess 300 holes

Claims

1. A box-shaped main body with an opening on its bottom surface, which is embedded in the ceiling, A display block protruding downward from the ceiling through the aforementioned opening, A frame attached to the main body so as to cover the opening and having a hole through which the display block is inserted, Power supply unit, Equipped with, The aforementioned display block is Display panel and The power supply unit includes a light source that is lit to illuminate the display panel, A holding member that holds the display panel and the light source unit, The retaining member has a hook portion, It has, The main body has a hooked portion to which the hooking portion is hooked, The hooked portion protrudes inward from the inner surface of the main body, The hooking portion has a groove into which the hooked portion can be inserted, and the hooking portion is hooked when it is inserted into the groove. The aforementioned opening is formed in a rectangular shape, The longitudinal direction of the groove coincides with the short direction of the opening. One end of the groove in the longitudinal direction is open, The aforementioned end of the groove widens outwards from the groove. The hooked portion protrudes inward from a pair of inner surfaces of the main body along the shorter direction of the opening, The power supply unit is housed within the main body so as to be in contact with the first of a pair of inner surfaces of the main body that are aligned along the longitudinal direction of the opening. The main body has a space between the second inner surface facing the first inner surface and the hooked portion that is longer than the longitudinal length of the hooked portion. Display device.

2. A main body formed in the shape of a box having an opening on its lower surface and embedded in the ceiling, A display block protruding downward from the ceiling through the aforementioned opening, A frame attached to the main body so as to cover the opening and having a hole through which the display block is inserted, Equipped with, The aforementioned display block is Display panel and A light source unit that illuminates the aforementioned display panel, A holding member that holds the display panel and the light source unit, The retaining member has a hook portion, It has, The main body has a hooked portion to which the hooking portion is hooked, The hooked portion protrudes inward from the inner surface of the main body, The hooking portion has a groove into which the hooked portion can be inserted, and the hooking portion is hooked when it is inserted into the groove. The hooking portion further has a recess in the middle of the groove into which the hooked portion fits, The aforementioned opening is formed in a rectangular shape, The longitudinal direction of the groove coincides with the short direction of the opening. One end of the groove in the longitudinal direction is open, The aforementioned end of the groove widens outwards from the groove. Display device.

3. The main body has a guide portion that guides the hooked portion so as to draw the hooked portion into the groove from one end, The display device according to claim 1 or 2.

4. The main body has a stopper portion that is in contact with the hook portion along the insertion direction of the hook portion, The display device according to claim 1 or 2.

5. The main body has a positioning part that positions the display block with respect to the longitudinal direction of the opening when a part of the display block is inserted into the space. The display device according to claim 1.

6. The main body has a restricting portion that restricts the movement of the display block in the direction in which the hooking portion detaches from the hooked portion in the space, The restricting unit is detachably attached to the positioning unit and restricts the movement of the display block when attached to the positioning unit. The display device according to claim 5.

7. The hooking portion has a recess in the middle of the groove into which the hooked portion fits. The display device according to claim 1.

8. The main body further comprises a mounting spring that protrudes from the outer surface of the main body and is used to attach the main body to the ceiling, The mounting spring is located on the outer surface of the main body, above the hooked portion. The display device according to claim 1 or 2.

Images