Display mounting table

Abstract

The utility model provides a display mounting table, and relates to the technical field of displays. The display mounting table comprises a mounting main body, a bracket and a lifting driving device, and the bracket and the lifting driving device are both mounted on the mounting main body; the bracket comprises a first mounting part and a second mounting part, the first mounting part is used for mounting a first display, and the second mounting part is used for mounting a second display; the first mounting part is movably connected with the mounting main body; the first end of the second mounting part is rotatably connected with the first mounting part, and the second end of the second mounting part is movably connected with the mounting main body; compared with the first end, the second end is farther from the first mounting part; and the lifting driving device is connected with the first mounting part. According to the displayer installation table, through mutual cooperation of the installation body, the support and the lifting driving device, height adjustment of the first displayer and the second displayer and angle adjustment of the second displayer can be achieved.

Description

A monitor mounting platform Technical Field

[0001] This application relates to the field of display technology, and more particularly to a display mounting platform. Background Technology

[0002] In factories, data centers, laboratories, aircraft, special vehicles, and other similar settings and facilities, some equipment (such as intelligent control consoles and intelligent command centers) is typically equipped with multiple displays to facilitate staff browsing, reviewing, and processing of relevant information and data. These devices are diverse, including, for example, the "Vehicle-mounted Multifunctional Integrated Control Console" in utility model patent application number 201820947511.8; and the "Control Console Based on the New Ark 60 Improved Model" in utility model patent application number 201720004894.0.

[0003] In the aforementioned devices, the monitor is usually fixedly mounted on the main body of the device, which means that users cannot adjust the height of the monitor according to their own needs and usage habits. Summary of the Invention

[0004] The purpose of this application is to overcome the deficiencies of the prior art and provide a display mounting platform to solve the problems in the prior art.

[0005] To address the aforementioned issues, this application provides a display mounting platform, comprising a mounting body, a bracket, and a lifting drive device, wherein the bracket and the lifting drive device are both mounted on the mounting body.

[0006] The bracket includes a first mounting part and a second mounting part, wherein the first mounting part is used to mount a first display and the second mounting part is used to mount a second display.

[0007] The first mounting part is movably connected to the mounting body;

[0008] The first end of the second mounting part is rotatably connected to the first mounting part, and the second end of the second mounting part is movably connected to the mounting body; compared to the first end, the second end is farther away from the first mounting part;

[0009] The lifting drive device is connected to the first mounting part, wherein the lifting drive device is used to drive the first mounting part to move along the height direction of the mounting body.

[0010] In one possible implementation, the mounting body is provided with a guide device, which is used to guide the movement direction of the first mounting part.

[0011] In one possible implementation, the guiding device includes a slide rail and a slider, the slide rail being fixedly mounted on the mounting body, and the slider being slidably connected to the slide rail; wherein the slide rail is parallel to the height direction of the mounting body, and the slider is fixedly connected to the first mounting part.

[0012] In one possible implementation, the mounting body includes a tabletop, a base is provided below the tabletop, the base includes a mounting cavity, and a first linear guide rail is provided inside the mounting cavity;

[0013] The second end is provided with a first roller, and the first linear guide rail includes a first linear guide groove, and the first roller is disposed in the first linear guide groove; wherein, the first linear guide groove is used to guide the first roller so that the first roller moves along the first linear guide groove;

[0014] From the first end to the last end of the first linear guide groove, the distance between the first linear guide groove and the upper surface of the table gradually decreases; wherein, compared to the last end of the first linear guide groove, the first end of the first linear guide groove is farther from the first mounting part.

[0015] In one possible implementation, the tabletop is provided with an opening that communicates with the mounting cavity;

[0016] The opening includes an adjacent side, which is disposed opposite to the bottom of the second display.

[0017] A linkage is movably disposed within the mounting cavity. The linkage is located below the tabletop and is connected to the second end. The linkage is used to move with the second mounting part to fill the gap between the second display and the adjacent side.

[0018] In one possible implementation, a second linear guide rail is provided inside the mounting cavity. The second linear guide rail includes a second linear guide groove, wherein the second linear guide groove is parallel to the upper surface of the table.

[0019] The linkage component is provided with a second roller, which is disposed in the second linear guide groove; wherein, the second linear guide groove is used to guide the second roller so that the second roller moves along the second linear guide groove.

[0020] In one possible implementation, a connecting part is installed on the linkage, and a connecting member is provided on the connecting part; wherein, one end of the connecting member is rotatably connected to the connecting part, and the other end is rotatably connected to the second end.

[0021] In one possible implementation, the adjacent side is provided with a detection module, which is used to generate a detection signal when squeezed.

[0022] In one possible implementation, the lifting drive device includes an electric push rod, a hydraulic cylinder, or a pneumatic cylinder.

[0023] In one possible implementation, one or more of the first displays are mounted on the first mounting portion, and one or more of the second displays are mounted on the second mounting portion.

[0024] The beneficial effects of this application include:

[0025] The display mounting platform proposed in this application includes a mounting body, a bracket, and a lifting drive device. The bracket includes a first mounting part and a second mounting part. The first mounting part is used to mount a first display, and the second mounting part is used to mount a second display.

[0026] After the lifting drive is activated, it causes the first mounting part to move along the height direction of the mounting body, thereby adjusting the height of the first display on the first mounting part. Since the first end of the second mounting part is rotatably connected to the first mounting part, and the second end is movably connected to the mounting body, the second mounting part will rise and fall accordingly when the first mounting part is raised or lowered, thus adjusting the height of the second display on the second mounting part. During the raising and lowering process, the second mounting part will also rotate relative to the first mounting part, thereby adjusting the angle of the second display.

[0027] The monitor mounting platform, through the cooperation of the mounting body, bracket and lifting drive device, can achieve height adjustment of the first monitor and the second monitor, as well as angle adjustment of the second monitor. Attached Figure Description

[0028] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 shows a first schematic diagram of a display mounting platform;

[0030] Figure 2 shows a second schematic diagram of the monitor mounting platform in Figure 1;

[0031] Figure 3 shows a third schematic diagram of the display mounting platform after the housing has been removed in Figure 1;

[0032] Figure 4 shows a fourth schematic diagram of the display mounting platform after removing the housing, the first display and the second display in Figure 1;

[0033] Figure 5 shows a fifth schematic diagram of the monitor mounting platform in Figure 4;

[0034] Figure 6 shows a schematic diagram of the connection between a bracket, a lifting drive device, and a base.

[0035] Figure 7 shows a schematic diagram of a support;

[0036] Figure 8 shows a schematic diagram of the connection between a bracket, a linkage, a first linear guide rail, and a second linear guide rail.

[0037] Figure 9 shows a schematic diagram of the connection of a connecting arm, a connecting part, and a connecting member;

[0038] Figure 10 shows a schematic diagram of a first linear guide rail;

[0039] Figure 11 shows a schematic diagram of the connection of a connecting arm, a connecting part, a connecting component and a first linear guide rail;

[0040] Figure 12 shows a side view of Figure 11;

[0041] Figure 13 shows a schematic diagram of a linkage component;

[0042] Figure 14 shows a schematic diagram of a second linear guide;

[0043] Figure 15 shows a schematic diagram of the connection between the second linear guide and the second roller;

[0044] Figure 16 shows a cross-sectional view of a detection module.

[0045] Explanation of key component symbols:

[0046] 100-Mounting body; 110-Guiding device; 111-Slide rail; 112-Slider; 120-Housing; 121-Modible cover; 130-Tabletop; 131-Opening; 132-Adjacent side; 140-Base support; 141-Mounting cavity; 150-First linear guide rail; 151-First linear guide groove; 160-Linking component; 161-Second roller; 162-Connecting part; 163-Connecting component; 170-Second Linear guide rail; 171-Second linear guide groove; 200-Bracket; 210-First mounting part; 220-Second mounting part; 221-First end; 222-Second end; 223-Connecting arm; 224-First roller; 231-First display; 232-Second display; 300-Lifting drive device; 400-Detection module; 410-Elastic insulating shell; 411-First conductive adhesive strip; 412-Second conductive adhesive strip. Detailed Implementation

[0047] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0048] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0049] Example

[0050] Referring to Figures 1-6, this embodiment proposes a display mounting platform, including a mounting body 100, a bracket 200, and a lifting drive device 300, wherein the bracket 200 and the lifting drive device 300 are both mounted on the mounting body 100.

[0051] As shown in Figures 7 and 8, the bracket 200 includes a first mounting portion 210 and a second mounting portion 220. The first mounting portion 210 is used to mount the first display 231, and the second mounting portion 220 is used to mount the second display 232. The first display 231 is positioned higher than the second display 232.

[0052] The first display 231 can be fixedly installed on the first mounting part 210 by means of screws or the like, and the second display 232 can be fixedly installed on the second mounting part 220 by means of screws or the like. One or more first displays 231 are mounted on the first mounting part 210, and one or more second displays 232 are mounted on the second mounting part 220. In actual use, the number of first displays 231 mounted on the first mounting part 210 and the number of second displays 232 mounted on the second mounting part 220 can be determined as needed. In Figure 1, two first displays 231 are mounted on the first mounting part 210, and two second displays 232 are mounted on the second mounting part 220.

[0053] The first mounting part 210 is movably connected to the mounting body 100. Specifically, the first mounting part 210 is capable of linear movement relative to the mounting body 100, and the direction of movement of the first mounting part 210 relative to the mounting body 100 is parallel to the height direction of the mounting body 100.

[0054] The first end 221 of the second mounting part 220 is rotatably connected to the first mounting part 210, and the second end 222 of the second mounting part 220 is movably connected to the mounting body 100. The second end 222 is further away from the first mounting part 210 than the first end 221. Specifically, the first end 221 and the first mounting part 210 can be rotatably connected via a hinge, shaft, or other structure. When the first end 221 rotates relative to the first mounting part 210, the second mounting part 220 rotates about a preset rotation axis. The second end 222 can move linearly relative to the mounting body 100, and the direction of movement of the second end 222 relative to the mounting body 100 is not parallel to the height direction of the mounting body 100.

[0055] The lifting drive device 300 is connected to the first mounting part 210, wherein the lifting drive device 300 is used to drive the first mounting part 210 to move along the height direction of the mounting body 100. During the lifting and lowering of the first mounting part 210, the second mounting part 220 lifts and lowers with the first mounting part 210, and the second mounting part 220 also rotates relative to the first mounting part 210.

[0056] In most scenarios (e.g., in fixed locations such as factories, data centers, and laboratories), the monitor mounting platform is usually placed on a horizontal ground or floor. In this case, the height direction of the mounting body 100 is the vertical direction.

[0057] After the lifting drive device 300 is activated, it will drive the first mounting part 210 to move along the height direction of the mounting body 100, thereby adjusting the height of the first display 231 on the first mounting part 210. At the same time, the second mounting part 220 will rise and fall with the first mounting part 210, thereby adjusting the height of the second display 232 on the second mounting part 220.

[0058] Since the first end 221 of the second mounting part 220 is rotatably connected to the first mounting part 210, and the second end 222 of the second mounting part 220 is movably connected to the mounting body 100, the second mounting part 220 will also rotate relative to the first mounting part 210 during the raising and lowering process, thereby adjusting the angle of the second display 232. Specifically, the first end 221 moves along the height direction of the mounting body 100 with the first mounting part 210 to adjust the height of the second mounting part 220. At the same time, the second end 222 moves linearly relative to the mounting body 100, and the direction of movement of the second end 222 is not parallel to the height direction of the mounting body 100. In this way, the rotation of the second mounting part 220 is achieved, thereby adjusting the height and angle of the second display 232 on the second mounting part 220.

[0059] In this embodiment, the lifting drive device 300 includes an electric push rod. In other embodiments, a hydraulic cylinder, a pneumatic cylinder, or other devices or mechanisms capable of linear motion may be selected as the lifting drive device 300, depending on the actual application scenario.

[0060] As shown in Figure 3, in this embodiment, a guide device 110 is provided on the mounting body 100, and the guide device 110 is used to guide the movement direction of the first mounting part 210.

[0061] The guide device 110 includes a linear guide rail. Specifically, the guide device 110 includes a slide rail 111 and a slider 112. The slide rail 111 is fixedly mounted on the mounting body 100, and the slider 112 is slidably connected to the slide rail 111. The slide rail 111 is parallel to the height direction of the mounting body 100, and the slider 112 is fixedly connected to the first mounting part 210.

[0062] Referring to Figures 1 and 2, in this embodiment, a housing 120 is provided on the mounting body 100, and a guide device 110 is disposed inside the housing 120. The housing 120 can conceal and protect the guide device 110, related wiring structures, etc. Part of the first mounting part 210 is located inside the housing 120, and part of its structure is located outside the housing 120. The housing 120 has slots, holes, and other structures to facilitate the passage of the first mounting part 210.

[0063] The housing 120 is provided with several access ports, and each access port is equipped with a movable cover 121. When maintenance is required, the movable cover 121 at the corresponding position can be opened, and the guide device 110 and related wiring structures inside the housing 120 can be inspected through the corresponding access port.

[0064] As shown in Figures 1-5, the mounting body 100 includes a tabletop 130. A base support 140 is located below the tabletop 130, and the base support 140 includes a mounting cavity 141. A first linear guide rail 150 is disposed within the mounting cavity 141, and correspondingly, the first linear guide rail 150 is also located below the tabletop 130. The upper surface of the tabletop 130 is perpendicular to the height direction of the mounting body 100. The upper surface is flat.

[0065] The base 140 and the first linear guide rail 150 are both located directly below the tabletop 130.

[0066] As shown in Figures 7-9, the second mounting portion 220 includes two connecting arms 223, located on opposite sides of the second mounting portion 220. A second end 222 is located on the connecting arm 223. The second end 222 is provided with a first roller 224. Specifically, the first roller 224 is located at the end of the connecting arm 223.

[0067] As shown in Figures 10-12, the first linear guide rail 150 includes a first linear guide groove 151, and a first roller 224 is disposed within the first linear guide groove 151. The first linear guide groove 151 guides the first roller 224 so that the first roller 224 moves along the first linear guide groove 151.

[0068] From the beginning to the end of the first linear guide groove 151, the distance between the first linear guide groove 151 and the upper tabletop of the table 130 gradually decreases. Specifically, the beginning of the first linear guide groove 151 is farther from the first mounting portion 210 than the end of the first linear guide groove 151. The beginning and end of the first linear guide groove 151 are located at opposite ends along its length. In Figure 12, arrow a represents the beginning of the first linear guide groove 151, and arrow b represents the end of the first linear guide groove 151.

[0069] When the second mounting part 220 is in the initial position, the first roller 224 is at the beginning of the first linear guide groove 151. When the lifting drive device 300 is started and drives the first mounting part 210 to rise, the second mounting part 220 will rise accordingly. During this process, the first roller 224 moves toward the end of the first linear guide groove 151, and the second end 222 gradually approaches the side where the first mounting part 210 is located, and the height of the second end 222 also gradually rises.

[0070] The first linear guide groove 151 is set perpendicular to the preset rotation axis.

[0071] As shown in Figure 4, the tabletop 130 is provided with an opening 131, which is connected to the mounting cavity 141. The second mounting part 220 passes through the opening 131, thereby realizing the connection between the second end 222 and the first linear guide rail 150.

[0072] The opening 131 includes an adjacent side 132, which is disposed opposite to the bottom of the second display 232.

[0073] As shown in Figure 6, a linkage 160 is movably disposed within the mounting cavity 141. The linkage 160 is located below the tabletop 130 and is connected to the second end 222. The linkage 160 moves with the second mounting part 220 to fill the gap between the second display 232 and the adjacent side 132. In actual installation, the upper surface of the linkage 160 is parallel to the lower surface of the tabletop 130, and the vertical distance between them can be less than 0.1 cm.

[0074] When the second display 232 is in its initial position, the distance between the bottom of the second display 232 and the adjacent side 132 is minimal. As the position of the second display 232 rises, its bottom gradually approaches the side where the first display 231 is located, causing the distance between the bottom of the second display 232 and the adjacent side 132 to gradually increase. Consequently, the gap between the second display 232 and the adjacent side 132 also gradually increases. During the synchronous movement of the second display 232 with the second mounting part 220, the linkage 160 also moves with the second mounting part 220, thereby filling the gap between the bottom of the second display 232 and the adjacent side 132 and concealing the side of the opening 131 closest to the adjacent side 132.

[0075] As shown in Figure 6, a second linear guide rail 170 is provided inside the mounting cavity 141.

[0076] As shown in Figure 13, the second linear guide rail 170 includes a second linear guide groove 171, wherein the second linear guide groove 171 is parallel to the upper table surface of the table 130, and the second linear guide groove 171 is set perpendicular to the preset rotation axis.

[0077] As shown in Figures 14 and 15, a second roller 161 is provided on the linkage 160, and the second roller 161 is disposed within the second linear guide groove 171. The second linear guide groove 171 guides the second roller 161, allowing it to move along the groove. Constrained by the second linear guide 170, the linkage 160 can only move linearly along the direction parallel to the upper surface of the tabletop 130.

[0078] As shown in Figure 14, a connecting part 162 is installed on the linkage 160. The connecting part 162 can be fixedly installed to the bottom of the linkage 160 by welding, snap-fitting, or other methods.

[0079] As shown in Figures 9, 11, 12, and 14, a connector 163 is provided on the connecting portion 162. One end of the connector 163 is rotatably connected to the connecting portion 162, and the other end is rotatably connected to the second end 222. The axis of rotation of the connector 163 relative to the second end 222 is designated as the first axis of rotation, and the axis of rotation of the first roller 224 relative to the second end 222 is designated as the second axis of rotation. The first axis of rotation and the second axis of rotation can be coaxial.

[0080] The connector 163 includes an arc-shaped segment, so that when the linkage 160 moves with the second mounting part 220, the arc-shaped segment of the connector 163 can play a role in avoiding interference with the normal movement of the linkage 160 and the second mounting part 220.

[0081] When the lifting drive device 300 lowers the first display 231, the second display 232 will also lower. At this time, the gap between the second display 232 and the adjacent side 132 will gradually decrease. If there is an object on the linkage 160, the object will be squeezed by the bottom of the second display 232 and the adjacent side 132 as the gap decreases. This may cause the object to be damaged due to the squeezing and may also cause malfunctions of the display mounting platform.

[0082] In this embodiment, a detection module 400 is provided on the adjacent side 132. The detection module 400 is used to generate a detection signal when it is squeezed. The detection module 400 can be electrically connected to a control module, and the control module is also electrically connected to the lifting drive device 300. When the control module receives the detection signal generated by the detection module 400, the control module will send a control signal to the lifting drive device 300, thereby causing the lifting drive device 300 to stop its current movement and control the first mounting part 210 to rise a certain distance. In this way, the second display 232 will rise, and the distance between the bottom of the second display 232 and the adjacent side 132 will also increase, thereby preventing the object on the linkage 160 from being squeezed.

[0083] In one embodiment, as shown in FIG16, the detection module 400 includes an elastic insulating shell 410, a first conductive adhesive strip 411, and a second conductive adhesive strip 412. Both the first conductive adhesive strip 411 and the second conductive adhesive strip 412 are disposed inside the elastic insulating shell 410, and are initially spaced apart. The first conductive adhesive strip 411 is electrically connected to a positive terminal of the control module, and the second conductive adhesive strip 412 is electrically connected to a negative terminal of the control module. When the detection module 400 is compressed, the elastic insulating shell 410 deforms, and the first conductive adhesive strip 411 and the second conductive adhesive strip 412 come into contact, thereby making the positive and negative terminals conductive, thus generating a detection signal. When the pressure on the detection module 400 disappears, the elastic insulating shell 410 automatically returns to its original shape, causing the first conductive adhesive strip 411 and the second conductive adhesive strip 412 to automatically separate and no longer come into contact. The elastic insulating shell 410 can be made of silicone, rubber, or other elastic polymer insulating materials.

[0084] In other embodiments, the detection module 400 may include a thin-film pressure sensor, etc.

[0085] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0086] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A display mounting platform, characterized in that, The device includes a mounting body, a bracket, and a lifting drive device, wherein both the bracket and the lifting drive device are mounted on the mounting body; the bracket includes a first mounting portion and a second mounting portion, the first mounting portion being used to mount a first display, and the second mounting portion being used to mount a second display; the first mounting portion is movably connected to the mounting body; a first end of the second mounting portion is rotatably connected to the first mounting portion, and a second end of the second mounting portion is movably connected to the mounting body; the second end is farther from the first mounting portion than the first end; the lifting drive device is connected to the first mounting portion, wherein the lifting drive device is used to drive the first mounting portion to move along the height direction of the mounting body.

2. The display mounting platform according to claim 1, characterized in that, The mounting body is provided with a guide device, which is used to guide the movement direction of the first mounting part.

3. The display mounting platform according to claim 2, characterized in that, The guiding device includes a slide rail and a slider. The slide rail is fixedly mounted on the mounting body, and the slider is slidably connected to the slide rail. The slide rail is parallel to the height direction of the mounting body, and the slider is fixedly connected to the first mounting part.

4. The display mounting platform according to claim 1, characterized in that, The mounting body includes a tabletop, with a base support underneath. The base support includes a mounting cavity, and a first linear guide rail is disposed within the mounting cavity. A first roller is disposed at the second end of the first linear guide rail. The first linear guide rail includes a first linear guide groove, and the first roller is disposed within the first linear guide groove. The first linear guide groove guides the first roller so that it moves along the first linear guide groove. From the first end to the last end of the first linear guide groove, the distance between the first linear guide groove and the upper surface of the tabletop gradually decreases. The first end of the first linear guide groove is farther from the first mounting part than the last end of the first linear guide groove.

5. The display mounting platform according to claim 4, characterized in that, The tabletop has an opening that communicates with the mounting cavity; the opening includes an adjacent side that is opposite to the bottom of the second display; a linkage is movably disposed within the mounting cavity, the linkage being located below the tabletop, and the linkage being connected to the second end; the linkage is used to move with the second mounting part to fill the gap between the second display and the adjacent side.

6. The display mounting platform according to claim 5, characterized in that, A second linear guide rail is provided inside the mounting cavity. The second linear guide rail includes a second linear guide groove, wherein... The second linear guide groove is parallel to the upper surface of the table; the linkage is provided with a second roller, which is disposed in the second linear guide groove; wherein, the second linear guide groove is used to guide the second roller so that the second roller moves along the second linear guide groove.

7. The display mounting platform according to claim 6, characterized in that, The linkage is equipped with a connecting part, and the connecting part is provided with a connecting member; wherein, one end of the connecting member is rotatably connected to the connecting part, and the other end is rotatably connected to the second end.

8. The display mounting platform according to claim 5, characterized in that, The adjacent side is provided with a detection module, which is used to generate a detection signal when it is squeezed.

9. The display mounting platform according to claim 1, characterized in that, The lifting drive device includes an electric push rod, a hydraulic cylinder, or a pneumatic cylinder.

10. The display mounting platform according to claim 1, characterized in that, One or more of the first displays are mounted on the first mounting part, and one or more of the second displays are mounted on the second mounting part.

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