Display device

Abstract

The present invention provides a display device (1), which is installed on an opening (100H) of a plate-shaped component (100), and comprises: a frame portion (10), which is wider than the opening (100H) in the front view and covers the periphery of a display screen (10a); a main body portion (20), which is narrower than the opening (100H) in the front view; and a movable fall prevention portion (50), which is installed on the opposite side of the main body portion (20) to the display screen (10a), and when the display device (1) is installed on the plate-shaped component (100), the movable fall prevention portion (50) is installed to be movable between a first position located inside the opening (100H) in the front view and a second position partially located outside the opening (100H) in the front view.

Description

Technical Field

[0001] The present invention relates to a display device. Background Art

[0002] Panel-mounted programmable display devices are used as human-machine interface (HMI) devices for factory automation (FA) related equipment.

[0003] Patent Document 1 discloses a panel-mounted programmable display. When the panel-mounted display is mounted on a panel, the display is mounted at a predetermined mounting position and screws of mounting hardware are tightened to fix the display to the panel.

[0004] Prior art literature

[0005] Patent Literature

[0006] Patent Document 1: Japanese Patent Application Publication No. 2013-058600 Summary of the invention

[0007] Problem that the invention aims to solve

[0008] When the display device is mounted on a tray, the display device is inserted from the front surface of the tray and fixed from the back of the tray by a fitting. However, when going around to the back of the tray, the operator needs to release the hand holding the display device and go around to the back of the tray. When going around to the back of the tray, there is a possibility that the device will fall from the tray after the operator releases the hand.

[0009] The present invention provides a display device having a drop prevention measure during installation.

[0010] Methods used to solve problems

[0011] According to one embodiment of the present invention, there is provided a display device, which is mounted on an opening of a plate-shaped member, and the display device includes: a frame portion, which is wider than the opening in front view and covers the periphery of a display screen; and a main body portion, which is narrower than the opening in front view. In addition, the display device includes a movable fall prevention portion, which is mounted on the opposite side of the main body portion from the display screen, and when the display device is mounted on the plate-shaped member, the movable fall prevention portion is mounted so as to be movable between a first position located inside the opening in front view and a second position located partially outside the opening in front view.

[0012] Effects of the Invention

[0013] According to the display device of the present invention, it is possible to prevent the display device from falling during installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a front view of the display device of this embodiment.

[0015] Figure 2 It is a right side view of the display device of this embodiment.

[0016] Figure 3 It is a rear view of the display device of this embodiment.

[0017] Figure 4 It is a perspective view of the display device according to this embodiment.

[0018] Figure 5 It is an enlarged rear view of the movable fall prevention portion and its vicinity of the display device according to the present embodiment.

[0019] Figure 6 It is a cross-sectional view of the vicinity of a movable fall prevention portion of the display device according to the present embodiment.

[0020] Figure 7 It is an exploded perspective view of the movable fall prevention portion of the display device according to the present embodiment.

[0021] Figure 8 This is a diagram for explaining the mounting of the display device of this embodiment to a plate-like member (part 1).

[0022] Fig. 9 This is a diagram for explaining the mounting of the display device of this embodiment to the plate-shaped member (part 2).

[0023] Fig.10 This is a diagram (part 3) for explaining the mounting of the display device of this embodiment to the plate-shaped member.

[0024] Fig.11 This is a diagram (fourth) for explaining the mounting of the display device of this embodiment to the plate-shaped member.

[0025] Fig.12 This is a diagram (part 5) for explaining the mounting of the display device of this embodiment to the plate-shaped member.

[0026] Fig.13 This is a diagram (part six) for explaining the mounting of the display device of this embodiment to a plate-like member.

[0027] Fig.14 This is a diagram (part 7) for explaining the mounting of the display device of this embodiment to a plate-like member.

[0028] Fig.15 This is a diagram (the eighth) for explaining the mounting of the display device of this embodiment to the plate-shaped member.

[0029] Fig.16 This is a ninth diagram for explaining the mounting of the display device of this embodiment on a plate-like member.

[0030] Fig.17 This is a diagram (the tenth) for explaining the mounting of the display device of this embodiment on a plate-like member.

[0031] Fig.18 This is a diagram (No. 11) for explaining the mounting of the display device of this embodiment to a plate-like member.

[0032] Fig.19 This is a diagram for explaining a state where the display device according to the present embodiment is removed from a plate-like member.

[0033] Fig. 20 This is a diagram (the twelfth) for explaining the mounting of the display device of this embodiment to a plate-shaped member. DETAILED DESCRIPTION

[0034] Hereinafter, various embodiments of the present invention will be described with reference to the accompanying drawings. It should be noted that in the description of each embodiment and the description of the accompanying drawings, for components having substantially the same or corresponding functional configurations, repeated descriptions are sometimes omitted by assigning the same reference numerals. In addition, for ease of understanding, the scales of various parts in the accompanying drawings may be different from the actual scales.

[0035] It should be noted that, in the drawings, an XYZ orthogonal coordinate system is set for the convenience of explanation. For the coordinate axes perpendicular to the paper surface of the drawings, the cross mark in the circle of the coordinate axis indicates that the direction relative to the depth of the paper surface is positive, and the black dot mark in the circle indicates that the direction relative to the front side of the paper surface is positive. However, this coordinate system is determined for the purpose of explanation and does not limit the posture of the display device 1 of this embodiment.

[0036] In addition, Figures 1 to 7 In the diagram, the X-axis and the Y-axis are axes parallel to the display screen 10a of the display device 1. Specifically, the X-axis is an axis parallel to the longitudinal direction of the display screen 10a of the display device 1. In addition, the Y-axis is an axis parallel to the short side direction of the display screen 10a of the display device 1. The Z-axis is an axis perpendicular to the display screen 10a of the display device 1.

[0037] In order to show the position of the display device 1, the +Z side is sometimes referred to as the front side, and the -Z side is sometimes referred to as the rear side. In addition, the +X side is sometimes referred to as the right side, the -X side is sometimes referred to as the left side, the +Y side is sometimes referred to as the upper side, and the -Z side is sometimes referred to as the lower side. Furthermore, the +Z side of the display device 1 is sometimes referred to as the front side, and the -Z side is sometimes referred to as the rear side.

[0038] In addition, Figures 8 to 20 In the diagram, the X-axis and the Y-axis are axes parallel to the front surface 100F of the plate-like member 100 or the front surface 110F of the plate-like member 110. The Z-axis is an axis perpendicular to the front surface 100F of the plate-like member 100 or the front surface 110F of the plate-like member 110.

[0039] 《Display Device 1》

[0040] Figure 1 It is a front view of the display device 1 according to the present embodiment. Figure 2 It is a right side view of the display device 1 according to the present embodiment. Figure 3 It is a rear view of the display device 1 according to the present embodiment. Figure 4 It is a perspective view of the display device 1 according to the present embodiment.

[0041] The display device 1 is a so-called panel-mounted programmable display. The display device 1 is mounted on a plate-like member such as a front surface door of a control panel. The plate-like member has an opening. The display device 1 is inserted into the opening of the plate-like member from the front side and fixed from the rear side. The display device 1 has the functions of an output device for displaying measurement results, the status of the machine, etc., and an input device for inputting settings and operations.

[0042] The display device 1 includes a frame portion 10 , a main body portion 20 , and an attachment portion 30 .

[0043] <Frame 10>

[0044] The frame 10 has a display screen 10a inside. That is, the frame 10 is provided so as to cover the periphery of the display screen 10a. And the display screen 10a is used for display. In addition, the display screen 10a is used as a touch screen for input. The frame 10 is a plate-shaped member having a front surface 10F, a back surface 10B, and side surfaces 10S1, 10S2, 10S3, and 10S4. The display screen 10a is provided on the front surface 10F of the frame 10. In addition, a frame portion 10b is provided around the display screen 10a.

[0045] When viewed from the front, the side surfaces 10S1 , 10S2 , 10S3 , and 10S4 are located on the right side, the upper side, the left side, and the lower side, respectively, relative to the center of the frame portion 10 .

[0046] The display screen 10a is used to display images, characters, etc. In addition, the operator performs settings and inputs from the display screen 10a. The frame portion 10b is arranged around the display screen 10a. The frame portion 10b is provided to protect the display screen 10a.

[0047] The frame portion 10 is wider in a front view than an opening (for example, an opening 100H of a plate-like member 100 described later) of a plate-like member to which the display device 1 is mounted.

[0048] <Main body 20>

[0049] The main body 20 is used to house a substrate for operating the display device 1. The main body 20 is mounted on the back side 10B of the frame 10. The main body 20 is in the shape of a rectangular parallelepiped. The main body 20 is smaller than the frame 10 in the front view. That is, the main body 20 is narrower in the front view than the opening of the plate-like component to which the display device 1 is mounted (for example, the opening 100H of the plate-like component 100 described later). The main body 20 has side surfaces 20S1, 20S2, 20S3, and 20S4. In addition, the main body 20 has a back side 20B.

[0050] When viewed from the front, the side surfaces 20S1, 20S2, 20S3 and 20S4 are respectively located on the right side, the upper side, the left side and the lower side relative to the center of the main body 20.

[0051] The side surface 20S1 is located on the left side of the side surface 10S1 of the frame 10 when viewed from the front. The side surface 20S1 has an accessory engagement hole 21a. When the display device 1 is mounted on the plate-like member 100 (see Fig.17 ), the accessory engagement hole 21a engages with the mounting accessory 60a.

[0052] The side surface 20S2 is located below the side surface 10S2 of the frame 10 when viewed from the front. The side surface 20S2 has accessory engagement holes 21b, 21c, and 21d. When the display device 1 is mounted on the plate-like member 100 (see Fig.17 ), the accessory engaging holes 21b, 21c and 21d are engaged with the mounting accessories 60b, 60c and 60d respectively.

[0053] When viewed from the front, the side surface 20S3 is located on the right side relative to the side surface 10S3 of the frame portion 10. The side surface 20S3 has an accessory engagement hole 21e. When the display device 1 is mounted on the plate-like member 100 (see Fig.17 ), the accessory engagement hole 21e engages with the mounting accessory 60e.

[0054] The side surface 20S4 is located above the side surface 10S4 of the frame 10 when viewed from the front. The side surface 20S4 has accessory engagement holes 21f, 21g, and 21h. Fig.17 ), the accessory engaging holes 21f, 21g and 21h are engaged with the mounting accessories 60f, 60g and 60h respectively.

[0055] The back surface 20B includes a fixed fall prevention portion 41 , a fixed fall prevention portion 42 , and a movable fall prevention portion 50 .

[0056] The fixed fall prevention portion 41 and the fixed fall prevention portion 42 are provided at the end portion on the lower side of the back surface 20B so as to protrude downward from the side surface 20S4 (see Figure 3That is, the fixed fall prevention portion 41 and the fixed fall prevention portion 42 are provided on the opposite side of the main body 20 and the display screen 10a.

[0057] The movable fall prevention portion 50 will be described. Figure 5 It is an enlarged rear view of the movable fall prevention portion 50 and its vicinity of the display device 1 according to the present embodiment. Figure 6 1 is a cross-sectional view of the vicinity of the movable fall prevention portion 50 of the display device 1 according to the present embodiment. Specifically, Figure 6 yes Figure 5 II sectional view. Figure 7 It is an exploded perspective view of the movable fall prevention portion 50 of the display device 1 according to the present embodiment.

[0058] The movable fall prevention part 50 is a plate-shaped component. The movable fall prevention part 50 is formed of a resin such as polyamide, for example. The movable fall prevention part 50 is mounted on the back surface 20B of the main body 20. The movable fall prevention part 50 is mounted in a manner that can rotate around the axis AX1, in other words, the movable fall prevention part 50 is mounted in a manner that can move in the circumferential direction.

[0059] The main body 20 includes a rear plate 22 forming the rear surface 20B, and a frame member 23 forming the side surfaces 20S1 , 20S2 , 20S3 , and 20S4 .

[0060] The movable fall prevention part 50 is mounted on the back panel 22 by means of a cylindrical member 51 and screws 52 so as to be movable in the circumferential direction around the axis AX1. That is, the movable fall prevention part 50 is provided on the opposite side of the display screen 10a. By being mounted on the back panel 22 by means of the cylindrical member 51, the movable fall prevention part 50 can move in the circumferential direction around the axis AX1 under its own weight.

[0061] The main body 20 has a movement restriction portion 22a and a movement restriction portion 22b on the back panel 22 so that the movable fall prevention portion 50 does not rotate outside the predetermined angle range. The movement restriction portion 22a prevents the movable fall prevention portion 50 from rotating toward the -Y side from a direction parallel to the X-axis direction. In addition, the movement restriction portion 22b prevents the movable fall prevention portion 50 from rotating toward the -X side from a position closer to the +X side than parallel to the Y-axis.

[0062] <Attachment 30>

[0063] The accessory 30 is used to house a substrate for operating the display device 1. The accessory 30 is particularly used to house an interface for connecting to an external device and a power supply device. The accessory 30 is in the shape of a rectangular parallelepiped. The accessory 30 is attached to the back surface 20B of the main body 20. The accessory 30 is smaller than the main body 20 in the front view.

[0064] <Installation of Display Device 1 on Plate-Shaped Member 100>

[0065] Figures 8 to 18 1 is a diagram for explaining the installation of the display device 1 of the present embodiment to the plate-like member 100. The plate-like member 100 is, for example, a front door of a control panel. The plate-like member 100 has a front surface 100F and a back surface 100B. In addition, the plate-like member 100 has an opening 100H.

[0066] The display device 1 is mounted on the plate-like member 100 by inserting the main body 20 from the front surface 100F side of the plate-like member 100 .

[0067] The opening 100H is formed to be approximately several mm larger than the main body 20 in the front view so that the main body 20 of the display device 1 can be inserted into the opening 100H. In addition, the opening 100H is formed to be smaller than the frame 10 in the front view so that the frame 10 cannot pass through the opening 100H.

[0068] It should be noted that the size of the plate-like component 100 is not limited to Figures 8 to 18 The plate-like member 100 only needs to have an opening 100H for mounting the display device 1, and its size can be arbitrarily determined.

[0069] in addition, Figures 8 to 18 In the embodiment, it is assumed that gravity acts in the -Y direction of the Y-axis direction. That is, it is assumed that the plate-like member 100 is vertically disposed relative to the ground.

[0070] like Figure 8 as well as Fig. 9 As shown, the display device 1 is tilted forward relative to the plate-like member 100. In addition, the display device 1 tilted forward is inserted into the opening 100H of the plate-like member 100 from the lower side of the display device 1 along the arrows A1 and A2 in the tilted state.

[0071] When the lower side of the display device 1 is inserted, the fixed fall prevention portion 41 and the fixed fall prevention portion 42 contact the plate member 100 at the lower portion 100H1 of the opening 100H. Therefore, the lower side of the display device 1 inserted into the opening 100H can be prevented from being disengaged from the opening 100H toward the front side.

[0072] Next, in a state where the lower side of the display device 1 is inserted, the upper side of the display device 1 is inserted into the opening 100H. Fig.10 1 is a diagram showing a state where the lower side of the display device 1 is inserted and the upper side of the display device 1 is inserted into the opening 100H. Fig.11 Yes Fig.10 A partially enlarged view of B. Fig.12The movable fall prevention portion 50 is rotated along the arrow A3 and the upper side of the display device 1 is inserted.

[0073] in addition, Fig.13 The movable fall prevention part 50 is shown in a state where it is rotated along the arrow A3. Fig.14 The movable fall prevention part 50 is shown in a state where it is rotated in the direction opposite to the arrow A3 under its own weight.

[0074] When the upper side of the display device 1 is inserted into the opening 100H in a state where the lower side of the display device 1 is inserted, the movable fall prevention portion 50 contacts the front surface 100F of the plate-like member 100. Since the movable fall prevention portion 50 contacts the front surface 100F of the plate-like member 100, the upper side of the display device 1 cannot be inserted into the opening 100H in this state.

[0075] Then, the movable fall prevention part 50 is rotated along the arrow A3. If the movable fall prevention part 50 is rotated along the arrow A3, Fig.12 as well as Fig.13 As shown in FIG. 1 , the movable fall prevention unit 50 can pass through the opening 100H, so that the upper side of the display device 1 can be inserted into the opening 100H. That is, if the movable fall prevention unit 50 is rotated along the arrow A3, the movable fall prevention unit 50 is located inside the opening 100H. The position of the movable fall prevention unit 50 when the movable fall prevention unit 50 is located inside the opening 100H is an example of the first position.

[0076] Furthermore, when the upper side of the display device 1 is inserted, the movable fall prevention portion 50 rotates in the direction opposite to the arrow A3 under the action of its own weight. Fig.14 As shown in FIG. 1 , if the movable fall prevention part 50 is rotated in the direction opposite to the arrow A3, the movable fall prevention part 50 contacts the back surface 100B of the plate-like member 100. If the movable fall prevention part 50 contacts the back surface 100B of the plate-like member 100, the upper side of the display device 1 cannot be separated from the opening 100H. That is, if the movable fall prevention part 50 is rotated in the direction opposite to the arrow A3, a part of the movable fall prevention part 50 is located outside the opening 100H. The position of the movable fall prevention part 50 when a part of the movable fall prevention part 50 is located outside the opening 100H is an example of the second position.

[0077] The movable fall prevention portion 50 of the display device 1 is installed to be movable between a first position and a second position. In addition, the movement restriction portion 22a of the display device 1 prevents the movable fall prevention portion 50 located at the second position from moving from the second position to a direction opposite to the direction of movement to the first position. The movement restriction portion 22b of the display device 1 prevents the movable fall prevention portion 50 located at the first position from moving from the first position to a direction opposite to the direction of movement to the second position.

[0078] Fig.15 as well as Fig.16 The state in which the display device 1 is inserted into the opening 100H of the plate-shaped member 100 is shown. In the state in which the display device 1 is inserted into the opening 100H of the plate-shaped member 100, the fixed fall prevention portion 41, the fixed fall prevention portion 42, and the movable fall prevention portion 50 of the display device 1 are in contact with the back surface 100B of the plate-shaped member 100. Since the fixed fall prevention portion 41, the fixed fall prevention portion 42, and the movable fall prevention portion 50 of the display device 1 are in contact with the back surface 100B of the plate-shaped member 100, the display device 1 can be prevented from falling from the opening 100H.

[0079] Thus, the display device 1 of the present embodiment includes the fixed fall prevention portion 41 , the fixed fall prevention portion 42 , and the movable fall prevention portion 50 , and can prevent the display device 1 from falling while being inserted into the opening 100H of the plate-like member 100 .

[0080] Fig.17 as well as Fig.18 This is a diagram for explaining a method of finally mounting the display device 1 on the plate-shaped member 100 .

[0081] The display device 1 has the mounting fittings 60a, 60b, 60c, 60d, 60f, 60g, and 60h engaged with the fitting engagement holes 21a, 21b, 21c, 21d, 21f, 21g, and 21h, respectively. In the engaged state, by tightening the screws of the fitting engagement holes 21a, 21b, 21c, 21d, 21f, 21g, and 21h, the back surface 10B of the frame 10 and the mounting fittings 60a, 60b, 60c, 60d, 60f, 60g, and 60h sandwich the plate-like member 100. The display device 1 is mounted on the plate-like member 100 by sandwiching the plate-like member 100 between the back surface 10B of the frame 10 and the mounting fittings 60a, 60b, 60c, 60d, 60f, 60g, and 60h.

[0082] <Removal of Display Device 1 from Plate-Shaped Member 100>

[0083] Fig.19 This is a diagram for explaining a method of removing the display device 1 of the present embodiment in a temporarily installed state from the plate-like member 100 .

[0084] The display device 1 in the temporary setting state is composed of Fig.19 Therefore, when the display device 1 in the temporarily installed state is removed from the plate-shaped member 100, the display device 1 can be removed by pulling it obliquely upward to the left (along the arrow A4) when viewed from the front and not supported.

[0085] The movable fall prevention part 50 is formed of a relatively soft resin such as polyamide. Therefore, when the temporarily installed display device 1 is removed from the plate-like member 100, the display device 1 can be removed by pulling the upper side thereof along the arrow A5.

[0086] It should be noted that, when the movable fall prevention portion 50 can be operated from the back surface 100B side of the plate-like member 100 , the display device 1 in the temporarily installed state can be removed by rotating the movable fall prevention portion 50 .

[0087] <Installation Direction of Display Device 1>

[0088] Fig. 20 This is a diagram for explaining how the display device 1 of the present embodiment is mounted on a plate-like member 110. The plate-like member 110 has a front surface 110F and a back surface 110B.

[0089] The display device 1 can be set in a vertical position and mounted on the plate-shaped member 110. The display device 1 is inserted into the opening from the front surface 110F side and fixed from the back surface 110B. The opening of the plate-shaped member 110 is formed so that the vertical direction (Y-axis direction) becomes the length direction so that the display device 1 can be set in a vertical position.

[0090] When the display device 1 is set in a vertical orientation, for example, the movable fall prevention portion 50 is set at the bottom, and the fixed fall prevention portion 41 and the fixed fall prevention portion 42 are set in a horizontal orientation.

[0091] In this manner, the display device 1 of the present embodiment can be provided on the plate-like member 110 as a vertical display device.

[0092] <Function and Effect>

[0093] The display device of this embodiment includes a drop prevention portion, so that the display device can be prevented from sliding down. In particular, when the thickness is thin, as in the display device of this embodiment, the display device can be prevented from sliding down.

[0094] <Modification>

[0095] Although the display device 1 of this embodiment includes the fixed fall prevention portion 41 and the fixed fall prevention portion 42, for example, when the display device 1 does not move under the display device 1 due to its own weight, the fixed fall prevention portion 41 and the fixed fall prevention portion 42 may not be provided. By including the movable fall prevention portion 50, the display device 1 can be prevented from rotating forward and falling.

[0096] The plate-like member is not limited to being arranged vertically relative to the ground. That is, the plate-like member may be inclined toward the front side or the opposite side. For example, even if the plate-like member is inclined toward the front side, the display device 1 of this embodiment can prevent the display device 1 from falling toward the front side by including the fixed fall prevention portion 41, the fixed fall prevention portion 42, and the movable fall prevention portion 50.

[0097] It should be noted that, when the plate-like member is tilted toward the front side, if the angle of the plate-like member tilting toward the front side becomes larger, there is a case where the movable fall prevention part 50 does not rotate due to its own weight, so it is preferred that the plate-like member is tilted at 60 degrees or less relative to the vertical. It is more preferred that the plate-like member is tilted at 30 degrees or less relative to the vertical.

[0098] The movable fall prevention part 50 is not limited to rotating by its own weight. For example, it can be provided with a biasing member such as a spring, a pressing member such as an elastic member such as rubber, etc. so as to rotate around the axis AX1.

[0099] It should be noted that all aspects of the embodiments of the present invention are illustrative and not limiting. The above embodiments may be omitted, replaced, or modified in various ways without exceeding the scope of the appended claims and their gist.

[0100] Description of Reference Numerals

[0101] 1 Display device

[0102] 10 Frame

[0103] 10a Display screen

[0104] 10b Border

[0105] 10F front surface

[0106] 10B Back

[0107] 10S1, 10S2, 10S3, 10S4 side

[0108] 20 Main body

[0109] 20B Back

[0110] 20S1, 20S2, 20S3, 20S4 side

[0111] 21a, 21b, 21c, 21d, 21e, 21f, 21g, 21h Accessory mounting holes

[0112] 22 Back panel

[0113] 22a, 22b Movement restriction portion

[0114] 23 Frame components

[0115] 30. Subsidiary

[0116] 41, 42 Fixed fall prevention part

[0117] 50 Movable fall prevention unit

[0118] 51 Cylinder parts

[0119] 52 Screws

[0120] 60a, 60b, 60c, 60d, 60e, 60f, 60g, 60h Mounting accessories

[0121] 100 Plate-like parts

[0122] 100F front surface

[0123] 100B Back

[0124] 100H Open

[0125] 100H1 lower part

[0126] 110 Plate-like parts

[0127] 110F front surface

[0128] A1, A2, A3, A4, A5 Arrow

[0129] AX1 axis

Claims

1. A display device, mounted in an opening of a plate-shaped component, comprising: A frame portion, which is wider than the opening in the front view and covers the periphery of the display screen; a main body portion which is narrower than the opening in a front view; and a movable fall prevention portion mounted on the opposite side of the main body from the display screen, wherein when the display device is mounted on the plate-shaped member, the movable fall prevention portion is mounted so as to be movable between a first position located inside the opening in a front view and a second position located partially outside the opening in a front view, The movable fall prevention portion moves from the first position to the second position under its own weight or by a pressing member.

2. The display device according to claim 1, wherein: It also includes a fixed fall prevention part, which is different from the movable fall prevention part. The fixed fall prevention part is fixed to the main body on the side of the main body opposite to the display screen.

3. The display device according to claim 1 or 2, wherein: The movable fall prevention portion moves from the first position to the second position under its own weight.

4. The display device according to claim 1 or 2, wherein: The movable fall prevention portion is moved from the first position to the second position by a pressing member.

5. The display device according to claim 1 or 2, wherein: The movable fall prevention portion is formed of resin.

6. The display device according to claim 1 or 2, wherein: The main body includes a movement restriction portion that prevents the movable fall prevention portion located at the first position from moving in a direction opposite to a direction in which the movable fall prevention portion moves to the second position.

Images