Indication device

Abstract

To reduce the possibility of contact of a human body with a power supply side connector.SOLUTION: A display device B1 comprises a power supply device 11 for lighting a light source unit A1 with normal power, and a battery unit 13 for lighting the light source unit A1 by supplying emergency power to the power supply device 11 in the event of a power failure. The power supply device 11 has a power supply side connector part 111 including power supply side contacts (10A, 10A), and the battery unit 13 has a battery side connector part 131 including battery side contacts (10B, 10B). The battery side contacts (10B, 10B) can be connected to the power supply side contacts (10A, 10A), and the power supply side contacts (10A, 10A) are exposed when not connected to the battery side contacts (10B, 10B). The power supply side connector part 111 further includes a prevention structure 10C. The prevention structure 10C prevents contact of a human body with the power supply side contacts (10A, 10A) when they are exposed.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to a display device, and more particularly to a display device including a detachable battery unit. [Background technology]

[0002] Conventionally, there exists a display device that includes a power supply device that lights up a display unit using normal power from a normal power source, and a battery unit that supplies emergency power to the power supply device to light up the display unit in the event of a power outage in the normal power source.

[0003] An example of this type of display device is disclosed in Patent Document 1. In the device described in Patent Document 1, a power supply section (power supply device) and a battery (battery unit) are connected by a connector. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent Publication No. 2021-57267 Summary of the Invention [Problem to be solved by the invention]

[0005] In a display device, the connectors may be uncoupled (that is, the power supply connector and the battery connector may be separated) for battery replacement or the like.

[0006] In conventional display devices, when the connector is released from its coupling, the contacts of the power supply connector (hereinafter referred to as power supply contacts) are exposed, and there is a possibility that the human body may come into contact with the power supply contacts.

[0007] For example, if the normal power source is a commercial power system and the connector is uncoupled without cutting off the normal power from the power system, there is a possibility of electric shock if a human body comes into contact with the power source side contact (live part).

[0008] An object of the present disclosure is to provide a display device that can reduce the possibility of human body contact with the power supply side contacts. [Means for solving the problem]

[0009] A display device according to one aspect of the present disclosure includes a light source unit, a display panel illuminated by the light source unit, a power supply device that lights up the light source unit with normal power supplied from a normal power source, a battery unit that lights up the light source unit by supplying emergency power to the power supply device in the event of a power outage of the normal power source, and a main body that holds the light source unit, the display panel, and the power supply device. The power supply device has a power supply side connector portion, and the power supply side connector portion includes: a pair The battery unit includes a power supply side contact. The battery side connector includes: a pair The battery side contact is included. a pair The battery side contact is a pair It is possible to physically and electrically couple with the power supply side contact. a pair The power supply side contact is a pair The power supply side connector portion further includes a prevention structure, and the prevention structure is configured to prevent the battery side contact from being connected to the power supply side connector portion. a pair The battery-side contact is not connected to the a pair Prevents human contact with the power supply contacts. The prevention structure is a wall portion surrounding the pair of power supply side contacts. The distance between two opposing portions of the wall portion is large enough to prevent a test finger from contacting the pair of power supply side contacts. The wall portion includes a pair of pillar portions. The pair of pillar portions are arranged side by side along a first direction. The battery side connector portion further includes a pair of insertion portions. The pair of pillar portions are inserted into the pair of insertion portions. The pair of power supply side contacts of the power supply side connector portion are arranged side by side along the first direction. The pair of pillar portions face the pair of power supply side contacts in a second direction perpendicular to the first direction. [Effects of the Invention]

[0010] The display device of the present disclosure has the advantage of being able to reduce the possibility of human body contact with the power supply side contacts. [Brief explanation of the drawings]

[0011] [Figure 1] FIG. 1 is an external view of a display device according to an embodiment of the present disclosure. [Figure 2] FIG. 2 is an exploded perspective view of the display device. [Figure 3]FIG. 3 is a perspective view showing a coupled state of a power supply device and a battery unit included in the display device. [Figure 4] FIG. 4A is a perspective view of the power supply device, and FIG. 4B is an enlarged perspective view of a power supply side contact of the power supply device. [Figure 5] FIG. 5A is a perspective view showing the front side of the battery unit, and FIG. 5B is a perspective view showing the rear side of the battery unit. [Figure 6] FIG. 6 is a perspective view showing a modified example of the battery unit. [Figure 7] FIG. 7 is a cross-sectional view showing a state in which a test finger is in contact with the power supply side connector of the power supply device. DETAILED DESCRIPTION OF THE INVENTION

[0012] A display device B1 according to an embodiment of the present disclosure will be described below. The display device B1 described below is an emergency exit light installed at an emergency exit or a passageway to an emergency exit in a building such as an office or a store. However, the display device B1 according to the embodiment is not limited to emergency exit lights, and may be used, for example, to indicate a specific location (such as a restroom) within a building. In the following description, unless otherwise specified, the up / down, front / back, and left / right directions indicated by arrows in FIG. 1 are defined as the up / down, front / back, and left / right directions of the display device B1.

[0013] As shown in Figures 1 and 2, the display device B1 includes a light source unit A1, a display panel 20 illuminated by the light source unit A1, a power supply device 11 that lights up the light source unit A1 with normal power supplied from a normal power source, a battery unit 13 that supplies emergency power to the power supply device 11 in the event of a power outage in the normal power source to light up the light source unit A1, and a main body 1 that holds the light source unit A1, the display panel 20, and the power supply device 11.

[0014] (1) Main unit The main body 1 is made of synthetic resin material and has a rectangular box shape with an opening on the front. The light source unit A1 and the display panel 20 are attached to the opening on the front of the main body 1. In this embodiment, the display panel 20 is detachable from the opening of the main body 1.

[0015] As shown in Fig. 2, the main body 1 houses a power supply device 11, a battery unit 13, a terminal block 12, a mounting plate 10, etc. The mounting plate 10 is formed into a plate shape from a metal material. The mounting plate 10 is fixed to the inner bottom surface of the main body 1 with screws.

[0016] The power supply device 11 and the terminal block 12 are screwed to the mounting plate 10 and housed in the main body 1. The battery unit 13 is detachably attached to the mounting plate 10.

[0017] (2) Light source unit and display panel The light source unit A1 has a housing 4, and a light emitting section, a light guide, and the like (not shown) are housed in the housing 4. The display panel 20 includes a light guide plate 21, and the light guide plate 21 is held by a holder 22.

[0018] In light source unit A1, light emitted by the light-emitting portion and guided by the light guide enters light guide plate 21 from incident surface 210 of light guide plate 21. The light that has entered light guide plate 21 travels inside light guide plate 21 and is totally reflected by the rear surface of holder 22, and is emitted forward to illuminate display panel 20.

[0019] In the embodiment, the light source unit A1 and the display panel 20 are provided on one side of the main body 1, but they may be provided on both sides of the main body 1.

[0020] (3) Power supply and battery unit The power supply device 11 lights up the light source unit A1 with normal power supplied from a normal power source (for example, a commercial power system) and charges the battery unit 13. Furthermore, the power supply device 11 lights up the light source unit A1 with emergency power supplied from the battery unit 13 in the event of a power outage of the normal power source.

[0021] The battery unit 13 has a secondary battery. The battery unit 13 may have a primary battery, in which case the power supply device 11 does not charge the battery unit 13.

[0022] (3-1) Power supply connector 3 and 4, the power supply device 11 has a power supply side connector section 111. The power supply side connector section 111 is coupled to a battery side connector section 131 as shown in FIG.

[0023] (3-1-1) Power supply side contact The power supply side connector section 111 includes a power supply side contact that can be physically and electrically coupled to a battery side contact (described later) that constitutes the battery side connector section 131.

[0024] The power supply contact and the battery contact are made of a conductor (metal, alloy, etc.). The power supply contact has a shape that can mate with the battery contact. For example, the battery contact has a hole shape, and the power supply contact has a protrusion shape that can mate with the hole shape.

[0025] The power supply side contacts in this embodiment are a pair of male terminals 10A, 10A as shown in FIG. 4, and will be hereinafter referred to as "power supply side contacts (10A, 10A)".

[0026] Although details will be described later, the battery side contacts (10B, 10B) in this embodiment are a pair of female terminals 10B, 10B as shown in FIG. 5B, and will be referred to as "battery side contacts (10B, 10B)" below.

[0027] However, the male and female terminals on the power supply side and the battery side may be reversed (ie, the power supply side contacts may be a pair of female terminals 10B, 10B, and the battery side contacts may be a pair of male terminals 10A, 10A).

[0028] The power supply side contacts (10A, 10A) are exposed as shown in FIG. 4 when not coupled with the battery side contacts (10B, 10B).

[0029] (3-1-2) Prevention structure The power supply side connector portion 111 further includes a prevention structure 10C. The prevention structure 10C prevents human body contact with the power supply side contacts (10A, 10A) that are not coupled with the battery side contacts (10B, 10B) (i.e., exposed).

[0030] The prevention structure 10C in this embodiment is a wall portion (10C1-10C3) that surrounds the power supply side contacts (10A, 10A). The human body is, for example, the body of a worker who performs work such as battery replacement on the display device B1, and in particular the fingertips.

[0031] In this embodiment, the power supply contacts are a pair of male terminals 10A, 10A, making them particularly susceptible to human contact. However, even if the power supply contacts are a pair of female terminals 10B, 10B, human contact with the power supply contacts may occur depending on the shape of the terminals. The wall portions (10C1-10C3) will be described later.

[0032] According to this embodiment, by providing a preventive structure 10C (wall portion (10C1-10C3) surrounding the power supply side contacts (10A, 10A)) in the power supply side connector portion 111 including the power supply side contacts (10A, 10A), it is possible to reduce the possibility of human body contact with the power supply side contacts (10A, 10A).

[0033] Therefore, for example, even if the connector parts (111, 131) are uncoupled without cutting off the normal power from the commercial power system, the possibility of electric shock due to human contact with the power supply side contacts (10A, 10A), which are live parts, is reduced, thereby improving safety. Live parts are conductors or conductive parts intended to apply electricity during normal use (see JIS C0365).

[0034] (3-2) Battery side connector 3, 5A, and 5B, the battery unit 13 has a battery-side connector portion 131. The battery-side connector portion 131 is coupled to the power supply-side connector portion 111, as shown in FIG.

[0035] (3-2-1) Battery side contact The battery-side connector portion 131 includes battery-side contacts (10B, 10B). The battery-side contacts (10B, 10B) can be physically and electrically coupled to the power-supply-side contacts (10A, 10A).

[0036] As described above, the battery-side contacts (10B, 10B) are made of a conductor and have a shape (e.g., a hole shape) that allows them to mate with the power supply-side contacts (10A, 10A). The battery-side contacts in this embodiment are a pair of female terminals 10B, 10B as shown in FIG.

[0037] (4) Details of the prevention structure (4-1) Wall part As described above, the preventing structure 10C in this embodiment is the wall portion (10C1-10C3) that surrounds the power supply side contacts (the pair of male terminals 10A, 10A).

[0038] The wall portions (10C1-10C3) in this embodiment are rectangular in shape and are longer in the vertical direction than in the horizontal direction when viewed from the front, as shown in Fig. 4. The wall portions (10C1-10C3) are composed of a pair of pillar portions 10C1, 10C1, a pair of side wall portions 10C2, 10C2, and a rear wall portion 10C3.

[0039] Although the wall portion (10C1-10C3) in this embodiment includes a pair (two) of pillar portions 10C1, 10C1, the number of pillar portions 10C1 included in the wall portion (10C1-10C3) may be one, or three or more.

[0040] Furthermore, although the wall portions (10C1-10C3) in this embodiment are rectangular, the shape of the wall portions (10C1-10C3) may be a polygon other than a rectangle, or a circle (including an oblate circle such as an oval).

[0041] (4-1-1) Pillar part The pair of pillar portions 10C1, 10C1 are located to the left of the pair of male terminals 10A, 10A.

[0042] The pair of pillars 10C1, 10C1 are slightly tapered at their tips, which makes it easier to insert the pair of pillars 10C1, 10C1 into a pair of insertion portions 131A, 131A (see FIG. 5B; described below) of the battery-side connector portion 131.

[0043] (4-1-2) Side wall and back wall The pair of side wall portions 10C2, 10C2 are positioned above and below the pair of male terminals 10A, 10A. The back wall portion 10C3 is positioned to the right of the pair of male terminals 10A, 10A.

[0044] (4-2) Wall and test finger In the wall portion (10C1-10C3) configured as described above, the distance between two opposing portions (e.g., a pair of side wall portions 10C2, 10C2: hereinafter referred to as "opposing portions") is large enough to prevent the test finger F1 from contacting the power supply side contacts (a pair of male terminals 10A, 10A), as shown in FIG. 7, for example.

[0045] The cross-sectional view of Figure 7 is an enlarged cross-sectional view corresponding to the enlarged oblique view of Figure 4B, and specifically, it is an enlarged view of the portion corresponding to the power supply side connector portion 111 shown by the dotted line in Figure 4B in a cross-sectional view of the power supply device 11 shown in Figure 4A cut along a plane passing through the pair of male terminals 10A, 10A.

[0046] (4-2-1) Opposing part The opposing portions referred to here are, for example, the pair of side wall portions 10C2, 10C2 shown in FIGS. 4A and 4B (that is, the portions corresponding to the pair of short sides of the rectangle).

[0047] Alternatively, the opposing portions may be, for example, the front end of one of the pair of side wall portions 10C2, 10C2 and the rear end of the other (that is, portions corresponding to the diagonal corners of the rectangle).

[0048] Alternatively, if the wall portion (10C1-10C3) is a rectangle that is longer left-to-right than up-to-down when viewed from the front (not shown), the opposing portions may be, for example, a pair of pillar portions 10C1, 10C1 (generally, one or more pillar portions 10C1...) and the rear wall portion 10C3 (i.e., the portions corresponding to a pair of long sides of the above rectangle).

[0049] The opposing portions of the circular wall (not shown) are the two portions with the greatest distance between them (for example, portions corresponding to both ends of the diameter of a circle, or both ends of the major axis of an oblate oval).

[0050] (4-2-2) Test finger The test finger F1 is, for example, a dummy finger as defined in Appendix 4, Section 1(2)(c) of the Electrical Appliance and Material Safety Law.

[0051] (4-2-3) Spacing between opposing parts The distance between the opposing portions is "a size that prevents the test finger F1 from contacting the power supply side contact (10A, 10A)" (hereinafter referred to as "non-contact condition"), which means, for example, that the distance between the pair of side wall portions 10C2, 10C2 (the length corresponding to the long side of the above-mentioned rectangle) is smaller than the width of the test finger F1 (the length corresponding to the outer diameter of the tip side of the truncated cone-shaped test finger F1).

[0052] Alternatively, the non-contact condition may be, for example, that the distance (the length of the diagonal) between the front end of one of the pair of side wall portions 10C2, 10C2 and the rear end of the other (i.e., the portion corresponding to the diagonal of the above-mentioned rectangle) is smaller than the width of the test finger F1.

[0053] Generally, when the wall portions (10C1-10C3) have a convex shape (circular, polygonal, etc.) without any recesses when viewed from the front (the direction in which the wall rises), the "distance between the opposing portions" to be compared with the width of the test finger F1 is the span of the wall portions (10C1-10C3). In this embodiment, the span is the length of the line connecting the opposing portions that maximizes the gap (for example, the long side or diagonal in the case of a rectangle, the diameter in the case of a circle, or the major axis in the case of an oblate circle). Therefore, the non-contact condition may be, for example, "the wall portions (10C1-10C3) have a span such that the tip of the test finger F1 does not touch the power-side contacts (10A, 10A)."

[0054] This makes it possible to reduce the possibility of fingertip contact with the power supply side contacts (10A, 10A) with a simple configuration.

[0055] (5) Details of the battery side connector: Insertion part where the column is inserted As described above, the wall portions (10C1-10C3) include one or more pillar portions (here, a pair of pillar portions 10C1, 10C1).

[0056] The battery-side connector portion 131 further includes one or more insertion portions 131A... into which the one or more column portions 10C1... of the power source-side connector portion 111 are inserted. This makes it possible to stabilize the connection between the power source-side connector portion 111 and the battery-side connector portion 131.

[0057] 5B, the battery-side connector portion 131 in this embodiment includes a pair of insertion portions 131A, 131A into which the pair of pillar portions 10C1, 10C1 are inserted. As the pair of pillar portions 10C1, 10C1 are slightly tapered at their tips, the pair of insertion portions 131A, 131A are also slightly tapered at their inner ends. This further stabilizes the connection.

[0058] (6) Storage section In this embodiment, the main body 1 further holds a battery unit 13. More specifically, as shown in FIG. 1, the main body 1 has a housing section 1a. The housing section 1a is provided inside the main body 1 and houses the battery unit 13. The battery unit 13 is detachably attached to the mounting plate 10 while housed in the housing section 1a.

[0059] As described above, the display panel 20 is detachable from the main body 1, and when attached to the main body 1 it closes the housing portion 1a, and when removed from the main body 1 it opens the housing portion 1a.

[0060] According to this embodiment, in a battery-equipped display device B1 in which the display panel 20 is detachable, the possibility of human contact with the power supply side contacts (10A, 10A) when the display panel 20 is detached can be reduced.

[0061] Although the battery unit 13 in this embodiment is arranged inside the main body 1 (housed in the housing portion 1a inside the main body 1), it may be arranged outside the main body 1 as will be described in a modified example.

[0062] (7) Variation: External battery unit 6, the battery-side connector 131 in this modification is separate from the battery unit 13, and a connection wire 132 is interposed between the battery-side connector 131 and the battery unit 13. In other words, the battery-side connector 131 and the battery unit 13 are physically separate, and are electrically connected via the connection wire 132.

[0063] The battery unit 13 is disposed outside the main body 1. For example, the battery unit 13 may be attached to the outer surface of the main body 1 and held by the main body 1. Alternatively, the battery unit 13 may not be held by the main body 1 and may be disposed at a location separate from the main body 1.

[0064] The main body 1 is formed with, for example, a lead-in hole (not shown) for leading in the connection wire 132.

[0065] The battery side connector portion 131 of the connecting wire 132 extending from the battery unit 13 arranged outside the main body 1 is pulled into the inside of the main body 1, for example, through the above-mentioned pull-in hole, and the battery side connector portion 131 is connected to the power supply side connector portion 111 inside the main body 1.

[0066] According to this modification, in the external battery type display device B1, it is possible to reduce the possibility of human contact with the power supply side contacts (10A, 10A).

[0067] (8) Summary A display device (B1) according to a first aspect includes a light source unit (A1), a display panel (20) illuminated by the light source unit (A1), a power supply device (11) that lights the light source unit (A1) with normal power supplied from a normal power source, a battery unit (13) that supplies emergency power to the power supply device (11) in the event of a power outage of the normal power source to light the light source unit (A1), and a main body (1) that holds the light source unit (A1), the display panel (20), and the power supply device (11). The power supply device (11) has a power supply-side connector portion (111) that includes power supply-side contacts (10A, 10A). The battery unit (13) has a battery-side connector portion (131) that includes battery-side contacts (10B, 10B). The battery-side contacts (10B, 10B) can be physically and electrically coupled to the power-supply-side contacts (10A, 10A). The power-supply-side contacts (10A, 10A) are exposed when not coupled to the battery-side contacts (10B, 10B). The power-supply-side connector portion (111) further includes a preventive structure (10C), which prevents human body contact with the power-supply-side contacts (10A, 10A) when not coupled to the battery-side contacts (10B, 10B).

[0068] According to this aspect, it is possible to reduce the possibility of a human body coming into contact with the power supply side contacts (10A, 10A).

[0069] In the display device (B1) according to the second aspect, in the first aspect, the prevention structure (10C) is the wall portions (10C1-10C3). The wall portions (10C1-10C3) surround the power contacts (10A, 10A). The distance between two opposing portions of the wall portions (10C1-10C3) (a pair of side wall portions 10C2, 10C2) is large enough to prevent the test finger (F1) from contacting the power contacts (10A, 10A).

[0070] According to this aspect, the possibility of fingertip contact with the power supply side contacts (10A, 10A) can be reduced with a simple configuration.

[0071] In the display device (B1) according to the third aspect, in the second aspect, the wall portions (10C1-10C3) include one or more pillar portions (10C1...). The battery-side connector portion (131) further includes one or more insertion portions (131A...), and one or more pillar portions (10C1...) are inserted into the one or more insertion portions (131A...).

[0072] According to this embodiment, the connection between the power supply connector (111) and the battery connector (131) can be stabilized.

[0073] In the display device (B1) according to the fourth aspect, in any one of the first to third aspects, the battery unit (13) is disposed inside the main body (1).

[0074] According to this aspect, it is possible to provide a display device (B1) with a built-in battery that can reduce the possibility of human contact with the power supply side contacts (10A, 10A).

[0075] In a display device (B1) according to a fifth aspect, in the fourth aspect, the main body (1) has a storage section (1a), and the storage section (1a) is provided inside the main body (1) and stores a battery unit (13). The display panel (20) is detachably attached to the main body (1). The display panel (20) closes the storage section (1a) when attached to the main body (1), and opens the storage section (1a) when removed from the main body (1).

[0076] According to this embodiment, it is possible to provide a display device (B1) with a built-in battery and a detachable display panel (20) that can reduce the possibility of human contact with the power supply side contacts (10A, 10A).

[0077] In a display device (B1) according to a sixth aspect, in any one of the first to third aspects, the battery unit (13) is disposed outside the main body (1). The battery-side connector (131) is separate from the battery unit (13), and a connection line (132) is interposed between the battery unit (13) and the battery-side connector (131). The battery-side connector (131) of the connection line (132) is drawn into the main body (1), and the battery-side connector (131) is coupled to the power supply-side connector (111). [Explanation of symbols]

[0078] B1 Display device A1 Light Source Unit 20 Display panel 11 Power supply 111 Power supply connector 10A, 10A Power Supply Contact (Male Terminal) 10C prevention structure (wall) 10C1 Column 10C2 Side wall part 10C3 Back wall 13 Battery unit 131 Battery side connector 10B,10B Battery side contact (female terminal) 131A Insertion section 1 Main unit 1a Storage section F1 test finger

Claims

1. A light source unit; a display panel illuminated by the light source unit; a power supply device that lights the light source unit with normal power supplied from a normal power supply; a battery unit that supplies emergency power to the power supply device when the normal power supply fails, thereby lighting the light source unit; a main body that holds the light source unit, the display panel, and the power supply device, the power supply device has a power supply side connector portion including a pair of power supply side contacts, the battery unit has a battery-side connector portion including a pair of battery-side contacts that can be physically and electrically coupled to the pair of power-source-side contacts, the pair of power supply side contacts are exposed in a state where they are not coupled to the pair of battery side contacts, the power supply side connector portion further includes a prevention structure that prevents a human body from contacting the pair of power supply side contacts when the pair of battery side contacts are not coupled, the prevention structure is a wall portion surrounding the pair of power supply side contacts, a distance between the two opposing portions of the wall portion is large enough to prevent a test finger from contacting the pair of power-supply contacts; The wall portion includes a pair of pillar portions arranged side by side along a first direction, the battery-side connector portion further includes a pair of insertion portions into which the pair of pillar portions are inserted, the pair of power supply side contacts of the power supply side connector portion are arranged side by side in the first direction, the pair of pillar portions face the pair of power supply side contacts in a second direction perpendicular to the first direction; Display device.

2. The pair of pillars are arranged along the outer wall of the power supply device. The display device according to claim 1 .

3. The tip side of the pair of pillars is thinner than the base side, The pair of insertion parts are narrower at the rear side than at the front side. The display device according to claim 1 or 2.

4. The battery unit is disposed inside the main body. The display device according to any one of claims 1 to 3.

5. the main body has a housing portion provided inside the main body and housing the battery unit; the display panel is detachably attached to the main body, closes the storage section when attached to the main body, and opens the storage section when detached from the main body; The display device according to claim 4 .

6. the battery unit is disposed outside the main body; the battery-side connector portion is separate from the battery unit, and a connection line is interposed between the battery-side connector portion and the battery unit; the battery-side connector portion of the connection line is drawn into the main body, and the battery-side connector portion is coupled to the power supply-side connector portion; The display device according to any one of claims 1 to 3.

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