JP6695507B1 - Multi-display system and video display device - Google Patents

Abstract

In a multi-display system, the joint between the image display device and another adjacent image display device is adjusted so that it is not conspicuous, and when the image display module is reattached, the edge of the image display module and its adjacent part It is an object of the present invention to provide a technique capable of suppressing the interference of the ends of the video display module. Each image display device 100 includes a plurality of LED display modules 1000, a housing frame 5, a holding member 40, and a compression spring 365. The holding member 40 includes an adjusting screw 310 that is an adjusting unit that adjusts the steps in the front-rear direction of the plurality of LED display modules 1000 by a rotation operation, and a fixing unit that fixes the positions of the plurality of LED display modules 1000 in the front-rear direction by a rotation operation. And a boss 50 that is The compression spring 365 biases the holding member 40 rearward. The rotating shaft of the adjusting screw 310 is arranged coaxially with the rotating shaft of the boss 50.

Description

  The present invention relates to adjusting a step between display surfaces of a display module of a video display device included in a multi-display system.

  A multi-display system is proposed, which includes a plurality of video display devices in which a plurality of display elements such as LEDs (Light Emitting Diodes), which are light emitting elements, are arranged, and which displays an image on a large screen by combining the screens of the plurality of video display devices. Has been done. This multi-display system is widely used for displaying advertisements not only outdoors but also indoors due to improved performance of display elements and cost reduction. Therefore, it has been mainly used for displaying moving images such as natural images and animations.

  However, due to the miniaturization of display elements, the pixel pitch has become narrower, and appropriate display quality can be obtained even with a short viewing distance. As a result, the multi-display system has come to be used not only for displaying advertisements indoors, but also for displaying images on personal computers such as conference rooms and surveillance applications. Especially, in a multi-display system for monitoring, a personal computer image close to a still image may be displayed.

  In the multi-display system, an SMD (Surface Mount Device) type in which a small LED display module is mounted on a substrate is mainly used, and a large-scale multi-display system having a pixel pitch of 3 mm or more has been constructed so far. The LED display module is formed by mounting the LED display element inside the cavity of a molded product molded of ceramic or resin and hardening it with a sealing resin.

  However, in recent years, on the background of cost reduction and high definition of LED display elements using high-density mounted products, a video display device provided with LED display elements having a pixel pitch of 1 to 2 mm is tiled. A large-scale multi-display system, which is configured by arranging a plurality of lines, has been introduced to the market.

  By the way, in the multi-display system, the plane uniformity of the display surface of each image display device greatly affects the image quality. It is essential that the image display device be held and fixed and that the image display device can be replaced easily and without deterioration of quality during maintenance. Therefore, in a video display device configured by arranging a plurality of display modules, it is necessary to suppress steps in the front-rear direction of the display surface of the video display device, and to make adjustments so that these steps are not noticeable.

  For example, Patent Documents 1 and 2 disclose the configuration of a video display device and a method of holding the same.

JP-A-2007-248498 JP, 2017-62454, A

  Patent Documents 1 and 2 describe a method of holding the display surface of each video display device, but do not consider the step difference of the display surface due to the variation of the fixed position.

  In addition, in the structure in which the display surface is fixed by using screws, when the LED display module is once removed and then reattached, the position of the LED display module in the front-rear direction is not determined until the screw fits in the predetermined position, It becomes slanted with some of the mounting points of as a fulcrum. Therefore, the end of the LED display module may interfere with the end of the LED display module adjacent to the LED display module, and the LED display element may be damaged.

  Therefore, in the multi-display system, the present invention adjusts the joint between the image display device and another adjacent image display device so as not to be conspicuous, and when the image display module is reattached, It is an object of the present invention to provide a technique capable of suppressing interference between an end and an end of a video display module adjacent to the end.

A multi-display system according to the present invention is a multi-display system in which a plurality of image display devices are arranged to form a large screen, and each of the image display devices includes a plurality of image display modules in which light emitting elements are arranged, A housing frame to which the back surfaces of the plurality of video display modules are fixed, and a step which is rotatably supported by the housing frame and is rotatable, and the step in the front-back direction of the plurality of video display modules is adjusted by the rotation operation. And a holding member having a fixing portion that is rotatable and that fixes the positions of the plurality of image display modules in the front-rear direction by the rotating operation, and the rotation axis of the adjusting portion is the same as that of the fixing portion. The image display module is disposed coaxially with the rotation axis, the image display module has a male screw portion protruding from the back surface to the housing frame side, and the holding member is a flange made of a magnetic material that abuts on the back surface of the image display module. Portion, a disk-shaped magnet disposed inside the flange portion, the fixed portion fixed to the back surface of the magnet, and a central portion of the magnet that is disposed inside the fixed portion and penetrates the image. A sleeve portion into which the male screw portion of the display module is inserted, a taper portion formed on the rear side of the sleeve portion for guiding the male screw portion, and a taper portion formed on the rear side of the taper portion and rotating in synchronization with the magnet. that has a female threaded portion, the magnet coupling according to magnetic attraction between the magnet of the front surface can abut magnet jig and the holding member of the image display module, the fixing portion of the holding member the flange portion times the rotation rotatably supported in said adjustment unit is fixed to the rear surface of the flange portion, and has a through hole for guiding the inserted through said fixed part, biasing the fixed portion to the rear A compression spring is arranged between the rear end of the adjusting portion and a stopper arranged at the rear end of the fixing portion, and is attached to the flange portion when the image display module is temporarily fixed to the housing frame. The abutting surface of the abutting image display module is biased by the compression spring so as to be positioned in front of the abutting surface when the image display module is permanently fixed to the housing frame, when the display module is permanently fixed to the housing frame, said by the magnet jig by rotating the magnet, front Symbol internally threaded portion is rotated relative to the external thread portion, the outer peripheral portion of the front face of the magnet, A step in the front-rear direction of the image display module is adjusted in advance by the adjustment unit. The said flange portion abuts, is fastened to the front Stories female screw portion is the male screw portion, the fixing portion is moved forward, the compression spring is compressed, rebound the video display module due to the compression of the compression spring It is biased by force and fixed to the housing frame.

  According to the present invention, it is possible to adjust the joint between the video display device and another video display device adjacent to the video display device so as not to be conspicuous. Furthermore, when the video display module is reattached, the end of the video display module and the end of the video display module adjacent thereto can interfere with each other.

  Objects, features, aspects, and advantages of the present invention will become more apparent by the following detailed description and the accompanying drawings.

It is a perspective view showing a schematic structure of a multi-display system according to an embodiment. It is a perspective view showing a schematic structure of an image display device with which a multi-display system concerning an embodiment is provided. It is a perspective view which shows the state which removed one LED display module from the video display apparatus. It is sectional drawing which shows the state before the LED display module of an image display apparatus is attached to a holding member. It is a rear perspective view of a holding member. It is sectional drawing which shows the state which the LED display module of an image display apparatus was temporarily fixed to the holding member. It is sectional drawing which shows the state which the LED display module of an image display apparatus was finally fixed to the holding member. It is a perspective view showing a state where an LED display module of an image display device included in a multi-display system according to a related art is floated. FIG. 10 is a cross-sectional view showing a state before an LED display module of an image display device included in a multi-display system according to a related art is finally fixed to a housing frame. FIG. 11 is a cross-sectional view showing a state in which an LED display module of an image display device included in a multi-display system according to a related art is permanently fixed to a housing frame.

<Related technology>
First, prior to the description of the embodiments of the present invention, problems of the related art will be described in detail. FIG. 8 is a perspective view showing a state in which the LED display module 1001A of the image display device 100A included in the multi-display system according to the related art is in a floating state. FIG. 9 is a cross-sectional view showing a state before the LED display module 1000A of the video display device 100A included in the multi-display system according to the related art is finally fixed to the housing frame 5. FIG. 10 is a cross-sectional view showing a state where the LED display module 1000A of the video display device 100A included in the multi-display system according to the related art is permanently fixed to the housing frame 5.

  As shown in FIGS. 8 and 9, the video display device 100A included in the multi-display system includes four video display modules, LED display modules 1001A to 1004A, a housing frame 5, and a position adjusting bolt 3100. In the related art, when the LED display modules 1001A to 1004A are not distinguished, they are described as the LED display module 1000A.

  As shown in FIGS. 9 and 10, the LED display module 1000A includes an LED substrate 1 on which LED elements are mounted, a mold base 2 that holds the LED substrate 1, and a fixing screw 3000. The fixing screw 3000 includes a flange-shaped magnet 3001, a male screw portion 3002 protruding from the back surface of the magnet 3001 to the housing frame 5 side, and a holding component 3003 provided integrally with the back surface of the magnet 3001.

  The position adjusting bolt 3100 has a hollow cylindrical shape and is fixed to the housing frame 5 with a screw. A female screw portion 3101 that is screwed into the male screw portion 3002 is formed in the front portion inside the position adjusting bolt 3100, and the male screw portion 3002 and the female screw portion 3101 can be screwed together.

  In the related art, when each LED display module 1000A is removed or reattached from the display surface side in response to a product defect or the like, in order to rotate the magnet 3001 from the display surface side of the LED display module 1000A, as shown in FIG. A jig 520 having a magnet 521 and a knob 522 is used. Alternatively, a tool 3103 that rotates the male screw portion 3002 from the back side is used.

  When the male screw portion 3002 is screwed with the female screw portion 3101, the LED display module 1000A is in a floating state and is slanted as shown in FIG. 8 until the holding component 3003 is pulled to the housing frame 5 side and reaches the fixed position. The position is not fixed. As a result, the end portion of the LED display module 1000A and the end portion of the LED display module 1000A adjacent thereto may interfere with each other, and the LED display element mounted on the front surface side of the LED display module 1000A may be damaged. The following embodiment solves such a problem.

<Embodiment>
Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing a schematic configuration of a multi-display system 200 according to the embodiment.

  As shown in FIG. 1, the multi-display system 200 includes a plurality of image display devices 101 to 106 for displaying images arranged in a matrix. In the present embodiment, when the image display devices 101 to 106 are not distinguished, they are referred to as the image display device 100.

  FIG. 2 is a perspective view showing a schematic configuration of the image display device 100. FIG. 3 is a perspective view showing a state in which one LED display module 1001 is removed from the image display device 100. As shown in FIGS. 2 and 3, the image display device 100 includes four image display modules, LED display modules 1001 to 1004, a housing frame 5, holding members 41 to 43, and a compression spring 365 (see FIG. 4). I have it. In the present embodiment, when the LED display modules 1001 to 1004 are not distinguished, they are described as the LED display module 1000, and when the holding members 41 to 43 are not distinguished, they are described as the holding member 40. In the LED display module 1000, a plurality of light emitting elements such as LED elements are arranged.

  As shown in FIG. 3, the LED display module 1000 includes an LED substrate 1 on which LED elements are mounted, a mold base 2 that holds the LED substrate 1, and three mold bases that project from the back surface of the mold base 2 toward the housing frame 5 side. The male screw parts 11 to 13 are provided. In the present embodiment, when the male screw parts 11 to 13 are not distinguished, they are described as the male screw part 10. The holding member 40 is attached to the housing frame 5 and holds the male screw portion 10. The LED display module 1000 is provided with a metal fitting 700, and the metal fitting 700 assists in fixing the LED display module 1000 and the housing frame 5 during transportation.

  FIG. 4 is a cross-sectional view showing a state before the LED display module 1000 of the image display device 100 is attached to the holding member 40. FIG. 5 is a rear perspective view of the holding member 40.

  As shown in FIGS. 4 and 5, the holding member 40 includes a flange portion 351 made of a magnetic material, a disk-shaped magnet 30, a boss 50, a sleeve portion 350, a taper portion 361, a female screw portion 360, a stopper 364, and an adjustment member. A screw 310 is provided.

  The flange portion 351 has a circular shape when viewed from the front, and includes a front edge portion 351a, a side surface portion 351b, a back surface portion 351c, and an opening portion 351d. The flange portion 351 has a shape capable of covering the outer peripheral portion of the front surface, the side surface, and the rear surface of the magnet 30, and the portion excluding the outer peripheral portion of the front surface of the magnet 30 is exposed from the opening 351d. The front edge portion 351a, which is the contact surface of the flange portion 351 with respect to the LED display module 1000, contacts the back surface of the LED display module 1000.

  As shown in FIG. 5, the magnet 30 has six magnetic poles. The boss 50 is fixed to the center of the back surface of the magnet 30. Inside the boss 50, a sleeve portion 350, a taper portion 361, and a female screw portion 360 are provided. The sleeve portion 350 is fixed so as to penetrate the central portion of the magnet 30, and the male screw portion 10 of the LED display module 1000 is inserted into the sleeve portion 350. The taper portion 361 is continuously formed on the rear side of the sleeve portion 350 and guides the male screw portion 10 inserted in the sleeve portion 350 rearward. The female screw portion 360 is continuously formed on the rear side of the tapered portion 361 and is screwed with the male screw portion 10 guided by the tapered portion 361.

  The adjusting screw 310 is fixed to the back surface portion 351c of the flange portion 351 and screwed into the screw hole 5a of the housing frame 5. The back surface portion 351c of the flange portion 351 is sandwiched between the magnet 30 and the adjustment screw 310 that adjusts the step difference in the front-rear direction of the LED display module 1000. The adjusting screw 310 can be moved back and forth, for example, by a rotating operation with a tool from the back side. Accordingly, the steps in the front-rear direction of the plurality of LED display modules 1001 to 1004 can be adjusted by rotating the adjustment screw 310. Here, the adjusting screw 310 is rotatable and corresponds to an adjusting unit that adjusts a step in the front-rear direction of the LED display module 1000 by rotating.

  The adjusting screw 310 has a hollow cylindrical shape, and includes a through hole 310a that guides the boss 50 with high accuracy. The boss 50 is inserted into the through hole 310 a of the adjusting screw 310 and can move back and forth with respect to the adjusting screw 310.

  The compression spring 365 is attached to the rear end of the boss 50. Specifically, the compression spring 365 is mounted between the rear end of the adjusting screw 310 on the boss 50 and the stopper 364 arranged at the rear end of the boss 50. The compression spring 365 is retained by the stopper 364 and biases the holding member 40 rearward. As a result, the magnet 30 and the boss 50 of the holding member 40 are biased rearward by the compression spring 365 so as not to rattle.

  The stopper 364 is fixed to the rear end of the boss 50 with a screw 366. After the LED display modules 1001 to 1004 are adjusted to the positions where the LED display modules 1001 to 1004 are aligned by the rotating operation of the adjusting screw 310, the adjusting screw 310 is fixed to the housing frame 5 by the nut 55.

  FIG. 6 is a cross-sectional view showing a state where the LED display module 1000 of the image display device 100 is temporarily fixed to the holding member 40.

  As shown in FIG. 6, when the male screw portion 10 is inserted in parallel with the sleeve portion 350 having the same length, the LED display module 1000 is placed in contact with the flange portion 351 whose position in the front-rear direction is adjusted to the temporary fixing position in advance. It is close to the contact surface. The temporary fixing position is a position parallel to the front of the main fixing position of the LED display module 1000, and the LED display module 1000 is biased by the compression spring 365 via the boss 50. A predetermined clearance is provided between the rear surface of the LED display module 1000 and the front edge portion 351a of the flange portion 351 so that the LED display module 1000 does not become unstable such as being inclined. At this time, the LED display module 1000 is not permanently fixed.

  Here, the temporary fixing means a state in which the male screw portion 10 is inserted into the sleeve portion 350 and the LED display module 1000 is close to the contact surface of the flange portion 351.

  The multi-display system 200 further includes a magnet jig 500 that can come into contact with the front surface of the LED display module 1000. The magnet jig 500 is a jig for operating the magnet 30 of the holding member 40, and includes an exterior portion 511, a magnet 510 having the same number of poles as the magnet 30 of the holding member 40, and a knob 512.

  The magnet jig 500 includes a magnet 510 having the same magnetic pole as the magnet 30 of the holding member 40, and forms a magnet coupling by facing the magnet 30. With the LED display module 1000 in a predetermined position, the magnet 30 of the holding member 40 is pulled into the magnet 510 side of the magnet jig 500. Therefore, by rotating the magnet 510 of the magnet jig 500, the magnet of the holding member 40 is rotated. 30 and the boss 50 also rotate, and the LED display module 1000 can be attached and detached.

  By rotating the knob 512 while the magnet jig 500 is in contact with the LED display module 1000, the magnet 30 of the holding member 40 is synchronously rotated and the LED display module 1000 is fixed to the adjusted flange portion 351 at a predetermined position. You can do it. An adjusting screw 310 is fixed to the flange portion 351, and the adjusting screw 310 is fixed to a predetermined position by a nut 55.

  FIG. 7 is a cross-sectional view showing a state in which the LED display module 1000 of the image display device 100 is permanently fixed to the holding member 40.

  As shown in FIG. 7, when the knob 512 is rotated while the magnet jig 500 is in contact with the front surface of the LED display module 1000, the magnet 30 and the boss 50 of the holding member 40 move forward while rotating. The male screw portion 10 of the LED display module 1000 is screwed into the female screw portion 360 of the holding member 40, and the male screw portion 10 and the female screw portion 360 are fastened. When the boss 50 moves forward, the compression spring 365 mounted between the adjusting screw 310 and the stopper 364 is compressed. The flange portion 351 of the holding member 40 is fixed by the repulsive force due to the compression of the compression spring 365 between the LED display module 1000 and the adjustment screw 310 in which the step in the front-back direction of the LED display module 1000 is adjusted. There is. At this time, the contact surface of the LED display module 1000 is located rearward of the temporary fixing and is in contact with the contact surface of the flange portion 351.

  Here, the boss 50 is rotatable and corresponds to a fixing portion that fixes the position of the LED display module 1000 in the front-rear direction by rotating operation. In addition, the main fixing means a state in which the male screw portion 10 is fastened to the female screw portion 360 and the LED display module 1000 is fixed to the flange portion 351.

  After the assembly of the multi-display system 200, the knob 512 is rotated in the reverse direction with the magnet jig 500 in contact with the front surface of the LED display module 1000, so that the female screw portion 360 of the holding member 40 is rotated to the male screw portion of the LED display module 1000. It is possible to remove the LED display module 1000 by removing it from the LED display module 1000.

  In this embodiment, as shown in FIG. 3, the position of the LED display module 1000 is adjusted and fixed using the three male screw portions 10, but the number of the male screw portions 10 is not necessarily three. However, the number can be changed as needed.

  As described above, in the multi-display system 200 according to the embodiment, each video display device 100 includes a plurality of LED display modules 1000 in which light emitting elements are arranged, and a housing to which the back surfaces of the plurality of LED display modules 1000 are fixed. A body frame 5, an adjusting screw 310 that is rotatable and that adjusts the steps in the front-rear direction of the plurality of LED display modules 1000, and a rotating operation that rotates the positions of the plurality of LED display modules 1000 in the front-rear direction. The holding member 40 having the boss 50 that is fixed by an operation and the compression spring 365 that biases the boss 50 backward are provided, and the rotation shaft of the adjustment screw 310 is arranged coaxially with the rotation shaft of the boss 50.

  Therefore, the joint between the image display device 100 and another adjacent image display device 100 can be adjusted so as not to be noticeable.

  Further, since the compression spring 365 biases the boss 50 rearward, it is possible to suppress rattling of the LED display module 1000 attached to the holding member 40 including the boss 50. Accordingly, when the LED display module 1000 is reattached, it is possible to prevent the end portion of the LED display module 1000 and the end portion of the LED display module 1000 adjacent thereto from interfering with each other. This can prevent the light emitting element from being damaged.

  When the LED display module 1000 is attached to the housing frame 5, the rotation axis of the adjusting screw 310 of the holding member 40 and the rotation axis of the boss 50 are arranged coaxially, so that the LED display module 1000 is held and the front-rear direction. The position of can be adjusted. If the adjustment unit and the fixing unit are located at different positions, the adjustment position may be displaced when the position of the display surface is fixed after the adjustment unit adjusts the position.

  However, when the rotation axis of the adjustment unit and the rotation axis of the fixed unit are coaxial as in the present embodiment, the adjusted position does not shift when fixing the position after adjusting the position of the display surface, This has the effect of eliminating the bending of the display surface of the LED display module 1000 due to the positional deviation between the adjustment unit and the fixed unit.

  Further, since the LED display module 1000 is fastened and fixed by the male screw portion 10 and the female screw portion 360, even when a vibration such as an earthquake is applied after the multi-display system 200 is assembled and configured, the LED display module 1000 is displaced and It has the effect of suppressing falling.

  When the LED display module 1000 is removed or reattached from the display surface side, when the LED display module 1000 bends, the mounting operation is repeated many times in order to eliminate a step from the display surface of the adjacent LED display module 1000. However, in the present embodiment, the fixing of the LED display module 1000 does not become unstable, so that the work is easy even when the mounting work is repeated.

  The LED display module 1000 further includes a magnet jig 500 that can be brought into contact with the front surface of the LED display module 1000, the LED display module 1000 has a male screw portion 10 protruding from the back surface toward the housing frame 5, and the holding member 40 is the LED display module. A flange portion 351 made of a magnetic material that comes into contact with the back surface of 1000, a disk-shaped magnet 30 arranged inside the flange portion 351, a boss 50 fixed to the back surface of the magnet 30, and a boss 50 arranged inside the boss 50. A sleeve portion 350 that penetrates the central portion of the magnet 30 and into which the male screw portion 10 of the LED display module 1000 is inserted; a taper portion 361 that is formed on the rear side of the sleeve portion 350 to guide the male screw portion 10; A magnet formed by magnetic attraction between the magnet jig 500 and the magnet 30 of the holding member 40, which has a female screw portion 360 formed on the rear side and to which the male screw portion 10 is screwed, and which is brought into contact with the front surface of the LED display module 1000. The boss 50 of the holding member 40 is rotatably supported by the coupling.

  Therefore, since the boss 50 is pulled toward the LED display module 1000 side in the state where the LED display module 1000 is at the predetermined position, the magnet 30 of the holding member 40 and the boss 50 are rotated by rotating the magnet jig 500, and the LED The display module 1000 can be attached and detached.

  Since the magnet jig 500 allows the LED display module 1000 to be attached and detached from the display surface side, there is no need to provide a maintenance space for a person to enter on the back side of the product, and there is an effect of space saving.

  The adjusting screw 310 is fixed to the back surface of the flange portion 351 and has a through hole 310a for guiding the inserted boss 50. The compression spring 365 is arranged at the rear end of the adjusting screw 310 and the rear end of the boss 50. The contact surface of the LED display module 1000, which is disposed between the LED display module 1000 and the stopper 364, contacts the flange portion 351 when the LED display module 1000 is temporarily fixed to the housing frame 5. It is biased by the compression spring 365 so as to be positioned in front of the abutting surface when it is permanently fixed to the frame 5.

  Therefore, since the contact surface of the LED display module 1000 at the time of temporary fixing is located in front of that at the time of main fixing, the end portion of the LED display module 1000 can be repeatedly removed when the LED display module 1000 is repeatedly attached and detached. It is possible to suppress the interference of the end portion of the LED display module 1000 adjacent thereto.

  Since the boss 50 is biased by the compression spring 365, it is possible to prevent the fastening of the male screw portion 10 and the female screw portion 360 from being loosened due to vibration or the like.

  Although the present invention has been described in detail, the above description is illustrative in all aspects, and the present invention is not limited thereto. It is understood that innumerable variants not illustrated can be envisaged without departing from the scope of the invention.

  The present invention can appropriately modify or omit the embodiments within the scope of the invention.

  5 housing frame, 10 male screw part, 30 magnet, 40-43 holding member, 50 boss, 100-106 image display device, 200 multi-display system, 310 adjusting screw, 310a through hole, 350 sleeve part, 351 flange part, 360 Female thread part, 361 taper part, 364 stopper, 365 compression spring, 500 magnet jig, 1000-1004 LED display module.

Claims (2)

A multi-display system (200) in which a plurality of video display devices (100 to 106) are arranged to form a large screen,
Each of the video display devices (100 to 106)
A plurality of video display modules (1000 to 1004) in which light emitting elements are arranged,
A housing frame (5) to which the back surfaces of the plurality of video display modules (1000 to 1004) are fixed;
An adjustment unit (310) that is rotatably supported by the housing frame (5) and is rotatable, and that adjusts a step in the front-rear direction of the plurality of image display modules (1000 to 1004) by the rotation operation; A holding member (40 to 43) that has a fixing portion (50) that is operable and that fixes the positions of the plurality of image display modules (1000 to 1004) in the front-rear direction by the rotation operation;
Equipped with
The rotating shaft of the adjusting part (310) is arranged coaxially with the rotating shaft of the fixed part (50),
The video display module (1000 to 1004) has a male screw part (10) protruding from the back surface to the housing frame (5) side,
The holding member (40 to 43) is a flange portion (351) made of a magnetic material that comes into contact with the back surface of the image display module (1000 to 1004), and a disc shape disposed inside the flange portion (351). The magnet (30), the fixing part (50) fixed to the back surface of the magnet (30), and the image penetrating the central part of the magnet (30) disposed inside the fixing part (50). A sleeve part (350) into which the male screw part (10) of the display module (1000 to 1004) is inserted, and a taper part (361) formed on the rear side of the sleeve part (350) to guide the male screw part (10). ) and, formed on the rear side of the tapered portion (361) has a female threaded portion and the (360) you rotate synchronously with the magnet (30),
By the magnetic coupling by magnetic attraction between the magnet jig (500) capable of contacting the front surface of the image display module (1000 to 1004) and the magnet (30) of the holding member (40 to 43), the fixing portion of the holding member (40 to 43) (50) is supported on said flange portion (351) rotation able to,
The adjusting part (310) is fixed to the back surface of the flange part (351) and has a through hole (310a) for guiding the inserted fixing part (50),
A compression spring (365) for biasing the fixing portion (50) rearward is provided between a rear end of the adjusting portion (310) and a stopper (364) arranged at a rear end of the fixing portion (50). Placed,
When the image display module (1000 to 1004) is temporarily fixed to the housing frame (5), the contact surface of the image display module (1000 to 1004) that contacts the flange portion (351) is the image. The display module (1000 to 1004) is biased by the compression spring (365) so as to be positioned in front of the contact surface when the display module (1000 to 1004) is permanently fixed to the housing frame (5),
Wherein when the image display module (1000-1004) is permanently fixed to the housing frame (5), by rotating the magnet (30) by said magnet jig (500), before Symbol internally threaded portion (360) Rotates with respect to the male screw part (10) , and the outer peripheral part of the front surface of the magnet (30) and the step in the front-rear direction of the image display module (1000 to 1004) are adjusted in advance by the adjusting part (310). said flange portion (351) is abutting, concluded before Symbol internally threaded portion (360) of the male screw portion (10), the fixed portion (50) is moved forward, the compression spring (365) is compressed The multi-display system (200), in which the image display module (1000 to 1004) is biased by the repulsive force due to the compression of the compression spring (365) and fixed to the housing frame (5). A plurality of video display modules (1000 to 1004) in which light emitting elements are arranged,
A housing frame (5) to which the back surfaces of the plurality of video display modules (1000 to 1004) are fixed;
An adjustment unit (310) that is rotatably supported by the housing frame (5) and is rotatable, and that adjusts a step in the front-rear direction of the plurality of image display modules (1000 to 1004) by the rotation operation; A holding member (40 to 43) that has a fixing portion (50) that is operable and that fixes the positions of the plurality of image display modules (1000 to 1004) in the front-rear direction by the rotation operation;
Equipped with
The rotating shaft of the adjusting part (310) is arranged coaxially with the rotating shaft of the fixed part (50),
The video display module (1000 to 1004) has a male screw part (10) protruding from the back surface to the housing frame (5) side,
The holding member (40 to 43) is a flange portion (351) made of a magnetic material that comes into contact with the back surface of the image display module (1000 to 1004), and a disc shape disposed inside the flange portion (351). The magnet (30), the fixing part (50) fixed to the back surface of the magnet (30), and the image penetrating the central part of the magnet (30) disposed inside the fixing part (50). A sleeve part (350) into which the male screw part (10) of the display module (1000 to 1004) is inserted, and a taper part (361) formed on the rear side of the sleeve part (350) to guide the male screw part (10). ) and, formed on the rear side of the tapered portion (361) has a female threaded portion and the (360) you rotate synchronously with the magnet (30),
By the magnetic coupling by magnetic attraction between the magnet jig (500) capable of contacting the front surface of the image display module (1000 to 1004) and the magnet (30) of the holding member (40 to 43), the fixing portion of the holding member (40 to 43) (50) is supported on said flange portion (351) rotation able to,
The adjusting part (310) is fixed to the back surface of the flange part (351) and has a through hole (310a) for guiding the inserted fixing part (50),
A compression spring (365) for biasing the fixing portion (50) rearward is provided between a rear end of the adjusting portion (310) and a stopper (364) arranged at a rear end of the fixing portion (50). Placed,
When the image display module (1000 to 1004) is temporarily fixed to the housing frame (5), the contact surface of the image display module (1000 to 1004) that contacts the flange portion (351) is the image. The display module (1000 to 1004) is biased by the compression spring (365) so as to be positioned in front of the contact surface when the display module (1000 to 1004) is permanently fixed to the housing frame (5),
Wherein when the image display module (1000-1004) is permanently fixed to the housing frame (5), by rotating the magnet (30) by said magnet jig (500), before Symbol internally threaded portion (360) Rotates with respect to the male screw part (10) , and the outer peripheral part of the front surface of the magnet (30) and the step in the front-back direction of the video display module (1000 to 1004) are adjusted in advance by the adjusting part (310). said flange portion (351) is abutting, concluded before Symbol internally threaded portion (360) of the male screw portion (10), the fixed portion (50) is moved forward, the compression spring (365) is compressed And the image display module (1000 to 1004) is biased by the repulsive force due to the compression of the compression spring (365) and fixed to the housing frame (5).

Images