Installation device and installation method for building monitoring display screen

Abstract

The present invention relates to the field of display screen installation technology, and specifically to a mounting device and method for a building monitoring display screen, comprising a fixed housing fixed to a wall, a crossbar mounted along the length of the top of the fixed housing, and a screen mounting frame rotatably mounted on the crossbar; a vertically movable wedge-shaped support plate is provided within the fixed housing, the wedge-shaped support plate being used to squeeze the height-direction frame of the screen mounting frame and allow the screen mounting frame to rotate about the crossbar; a mounting seat is fixedly mounted on the top of the wedge-shaped support plate, and a rotating plate is mounted on the outer wall of the mounting seat for transverse rotation via a torsion spring shaft. Due to the above-described structural arrangement, the wedge-shaped support plate of the present invention can increase the contact area between the wedge-shaped support plate and the screen mounting frame when the screen mounting frame rotates to a larger angle, thereby improving the support stability. The larger angle between the screen mounting frame and the fixed housing facilitates the replacement of the internal display screen equipment and other circuits and parts by staff.

Description

Technical Field

[0001] The present invention relates to the technical field of display screen installation, and in particular to an installation device and an installation method for a building monitoring display screen. Background Art

[0002] As people's safety awareness increases, surveillance cameras are installed in various areas and corridors in the community to improve the safety of owners. The cameras monitor the community throughout the day and record the surveillance images in real time. The monitored images and recorded information will be fed back to the monitoring display screen in the control room. In order to achieve no blind spot monitoring of the community, many cameras are usually deployed in the community, and the walls of the control room are equipped with multiple display screens that match the cameras. These large-size display screens are usually fixed on the wall for on-duty personnel to watch.

[0003] However, the monitoring display screen will inevitably cause aging and failure of internal components during long-term monitoring work (usually 24 hours a day). For maintenance, the monitoring display screen fixed on the wall is usually disassembled and repaired before being installed again. This will not only affect the maintenance progress of the staff, but also cause the camera and display screen to be unable to record the safety of the community during the maintenance period. Summary of the Invention

[0004] The object of the present invention is to provide an installation device and an installation method for a building monitoring display screen to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a mounting device for a building monitoring display screen, comprising a fixed shell fixed to a wall, a cross bar installed along the length of the top of the fixed shell, and a screen mounting frame rotatably mounted on the cross bar; a vertically movable wedge-shaped support plate is provided inside the fixed shell, the wedge-shaped support plate is used to squeeze the height direction frame of the screen mounting frame and make the screen mounting frame rotate around the cross bar as the axis; a mounting seat is fixedly installed on the top of the wedge-shaped support plate, and a rotating plate is installed on the outer wall of the mounting seat for transverse rotation via a torsion spring shaft; the height direction frame of the screen mounting frame is located on the rotation and extrusion path of the rotating plate; an extrusion rod is installed on the inner wall of the fixed shell for rotational extrusion with one end of the rotating plate.

[0006] Preferably, the wedge-shaped supporting plate is formed with a wedge-shaped surface on the top facing the screen mounting bracket.

[0007] Preferably, the top inner walls on both sides of the screen mounting frame are provided with extruded wedge blocks, which can slide along the height direction of the screen mounting frame. A U-shaped groove is formed at the bottom of the extruded wedge block toward the cross bar, and the U-shaped groove extends out of the edge of the extruded wedge block.

[0008] Preferably, the top of the extrusion wedge block is wedge-shaped and is extruded and matched with the top inner wall of the fixed shell, and the inner wall of the screen mounting frame is installed with a spring for returning the extrusion wedge block upward.

[0009] Preferably, a locking hook is fixedly mounted on the outer wall of the mounting seat, a limiting portion of the locking hook extends to the interior of the screen mounting frame, and a limiting tube for use with the limiting portion of the locking hook is mounted inside the screen mounting frame.

[0010] Preferably, a motor is fixedly installed in the middle of the top of the fixed shell, and a threaded rod located inside the fixed shell is vertically installed at the output end of the motor. The external thread of the threaded rod is connected to a slider that moves along the length of the rod, and the wedge-shaped support plate is fixedly installed on the outer walls on both sides of the slider through a cross plate.

[0011] Preferably, the extrusion rod is fixedly mounted on the side wall of the fixed shell, and the extrusion rod is arranged parallel to the cross bar.

[0012] Preferably, the extrusion rod is a metal cylinder.

[0013] A method for installing a mounting device for a building monitoring display screen, comprising the following steps:

[0014] Step 1: Use external force to hang the screen mounting bracket on the crossbar. Under the action of gravity, the screen mounting bracket rotates around the crossbar as the axis and shrinks inside the fixed housing to complete the installation of the screen mounting bracket.

[0015] Step 2: The wedge-shaped support plate moves upward, driving the rotating plate to rotate and contact the frame of the screen mounting frame, causing the screen mounting frame to rotate to one side, making it easier to rotate the screen mounting frame out of the fixed housing, thereby enabling the maintenance, removal, and replacement of the equipment installed on the screen mounting frame.

[0016] Step 3: As the wedge-shaped support plate moves upward, its corners contact the frame of the screen mounting frame, causing the screen mounting frame to rotate and provide support for the entire screen mounting frame, thereby enabling equipment maintenance.

[0017] Step 4: As the screen mount rotates, the squeeze wedge moves downward against the top inner wall of the fixed housing. The U-shaped groove is inserted into the outside of the crossbar to prevent the screen mount from separating from the crossbar.

[0018] Step 5: Move the wedge-shaped support plate upward to the top of the screen mounting frame. The top wedge-shaped surface of the support plate fits the frame of the screen mounting frame and limits the screen mounting frame to facilitate the removal and replacement of the device.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. The present invention provides a wedge-shaped support plate. The vertical movement of the wedge-shaped support plate can squeeze the height direction frame of the screen mounting frame at its edge position and rotate it along the axis of the cross bar, thereby forming a certain angle between the screen mounting frame and the fixed shell; at this time, the staff can enter the back of the screen mounting frame to inspect and repair the display screen circuits and parts connected to the back; at the same time, the wedge-shaped support plate is formed with a wedge-shaped surface facing the top of the screen mounting frame. When the wedge-shaped support plate rises to rotate the screen mounting frame to form a larger angle, the contact area between the wedge-shaped support plate and the screen mounting frame is increased by the wedge-shaped surface, thereby improving the stability of the support. At this time, the larger angle between the screen mounting frame and the fixed shell makes it convenient for the staff to replace the internal display screen equipment and other circuits and parts.

[0021] 2. The present invention provides a rotating plate, which rotates to squeeze the frame of the screen mounting frame, and can automatically rotate the screen mounting frame to a small angle, which facilitates the rise of the wedge-shaped support plate and avoids the situation of pinching hands when manually pulling the bottom of the screen mounting frame.

[0022] 3. The present invention provides an extruding wedge block. When the extruding wedge block slides downward, the U-shaped groove formed at its bottom moves downward synchronously. The downward movement of the U-shaped groove inserts the outside of the cross bar and locks the cross bar in the L-shaped groove formed by the frame of the screen mounting frame. Therefore, during the rising process of the wedge-shaped support plate, in order to prevent excessive friction between the wedge support plate and the frame of the screen mounting frame, which would cause the screen mounting frame to move upward and separate from the cross bar, the extruding wedge block is simultaneously driven downward during the rotation of the screen mounting frame. The U-shaped groove formed at the bottom of the extruding wedge block can lock the cross bar in the L-shaped groove formed by the frame of the screen mounting frame, thereby improving the safety of equipment maintenance work. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 For the present invention Figure 1 A schematic diagram of the back cross-sectional structure of the fixed housing;

[0025] Figure 3 For the present invention Figure 1 A schematic side cross-sectional structural diagram of ;

[0026] Figure 4 For the present invention Figure 2 Schematic diagram of the structure at A in FIG;

[0027] Figure 5 For the present invention Figure 4 Schematic diagram of the top view structure;

[0028] Figure 6 For the present invention Figure 3 A schematic diagram of a state structure;

[0029] Figure 7 For the present invention Figure 6 A schematic diagram of a state structure;

[0030] Figure 8 For the present invention Figure 7 Another state structure diagram of ;

[0031] Figure 9 For the present invention Figure 7 Schematic diagram of the structure at B in FIG;

[0032] Figure 10 For the present invention Figure 9 Schematic diagram of the back structure of the extrusion wedge block.

[0033] In the figure: 1, fixed housing; 101, crossbar; 102, screen mounting bracket;

[0034] 2. Wedge-shaped support plate; 201. Slider; 202. Threaded rod;

[0035] 3. Mounting seat; 301. Rotating plate; 3011. Extrusion rod;

[0036] 4. Lock hook; 401. Limiting tube;

[0037] 5. Extrusion wedge block; 501. U-shaped groove. DETAILED DESCRIPTION

[0038] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0039] In the description of the present invention, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," "the other end," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0040] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "provided with," "connected," etc., should be understood in a broad sense. For example, "connected" may refer to a fixed connection, a detachable connection, or an integral connection; it may refer to a mechanical connection or an electrical connection; it may refer to a direct connection or an indirect connection through an intermediate medium; it may refer to internal communication between two components. Those skilled in the art will be able to understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0041] Example:

[0042] like Figures 1 to 10 As shown, the installation device for a building monitoring display screen in this embodiment includes a fixed housing 1 fixed to a wall by bolts, a cross bar 101 installed along the length of the top of the fixed housing 1, and a screen mounting bracket 102 rotatably mounted on the cross bar 101; when installing the screen mounting bracket 102, an L-shaped groove is formed at the connecting portion between the screen mounting bracket 102 and the cross bar 101, and the cross bar 101 is rotatably connected to the L-shaped groove. With manual assistance, the L-shaped grooves formed on both sides of the screen mounting bracket 102 are aligned and placed on the cross bar 101. The screen mounting bracket 102 is suspended on the cross bar 101 by its own gravity to form a display screen installation on the cross bar 101.

[0043] like Figure 3 and Figure 2 As shown, when the display screen or internal parts installed on the screen mounting frame 102 fail: the staff uses the switch to operate the motor fixedly installed in the middle of the top of the fixed shell 1, and the output end of the motor drives the threaded rod 202 installed vertically inside the fixed shell 1 to rotate, and the threaded rod 202 drives the external threaded connected slider 201 to move against the inner wall of the fixed shell 1. When the motor drives the threaded rod 202 to rotate forward, the slider 201 moves upward along the rod length of the threaded rod 202. The forward and reverse rotation of the motor and the coordinated transmission of the threaded rod 202 and the slider 201 are all existing technologies and will not be described in detail here. The movement of the slider 201 can drive the fixedly connected wedge-shaped support plate 2 to move synchronously. At this time, the staff assists in pulling the bottom of the screen mounting frame 102 and rotating it outward. At this time, the vertical movement of the wedge-shaped support plate 2 can squeeze the height direction frame of the screen mounting frame 102 at its edge position and cause it to rotate along the axis of the cross bar 101, as shown in FIG. Figure 7 As shown, a certain angle is formed between the screen mounting frame 102 and the fixed housing 1; at this time, the staff can enter the back of the screen mounting frame 102 to inspect the display screen circuits and parts connected to the back.

[0044] like Figure 3 、 Figure 2 、 Figure 4 and Figure 5As shown, a mounting seat 3 is fixedly mounted on the top of the wedge-shaped support plate 2, and a rotating plate 301 is mounted on the outer wall of the mounting seat 3 for transverse rotation via a torsion spring shaft, and the height direction frame of the screen mounting frame 102 is located on the rotation and extrusion path of the rotating plate 301; an extrusion rod 3011 is mounted on the inner wall of the fixed housing 1 for rotational extrusion with one end of the rotating plate 301, and the extrusion rod 3011 is fixedly mounted on the side wall of the fixed housing 1, and the extrusion rod 3011 is arranged parallel to the crossbar 101; that is, Figure 3 As shown, based on the upward movement of the wedge-shaped support plate 2, the movement of the wedge-shaped support plate 2 will drive the fixedly connected mounting base 3 to move upward synchronously, and the mounting base 3 will drive the rotating plate 301 to move synchronously. During the upward movement of the rotating plate 301, the end thereof away from the screen mounting frame 102 is located on the moving path of the squeezing rod 3011. The squeezing rod 3011 is a metal cylinder. One end of the rotating plate 301 will be squeezed against the outer wall of the squeezing rod 3011 and forced to rotate. During the rotation, the end thereof that is in contact with the frame of the screen mounting frame 102 will rotate upward, and by rotating and squeezing the frame of the screen mounting frame 102, the screen mounting frame 102 will rotate with the cross bar 101 as the rotation axis, as shown in FIG. Figure 6 As shown; during the continuous rise of the wedge-shaped support plate 2 and the rotating plate 301, the outer wall of the wedge-shaped support plate 2 will contact the frame of the screen mounting frame 102 and form a support; and during the continuous movement of the wedge-shaped support plate 2, the rotation angle of the screen mounting frame 102 gradually increases, forming a Figure 7 Therefore, the wedge-shaped support plate 2 rises at the same time, through the extrusion of the rotating plate 301 and the extrusion rod 3011, the screen mounting frame 102 can be automatically rotated to a small angle, which facilitates the rise of the wedge-shaped support plate 2 and avoids manual pulling of the bottom of the screen mounting frame 102 to prevent the occurrence of hand pinching.

[0045] like Figure 6 、 Figure 7 、 Figure 9 and Figure 10 As shown, the top inner walls of both sides of the screen mounting frame 102 are provided with extrusion wedge blocks 5, which can slide along the height direction of the screen mounting frame 102. The bottom of the extrusion wedge block 5 is formed with a U-shaped groove 501 toward the crossbar 101, and the U-shaped groove 501 extends beyond the edge of the extrusion wedge block 5; the top of the extrusion wedge block 5 is wedge-shaped and is extruded and engaged with the top inner wall of the fixed housing 1, and the inner wall of the screen mounting frame 102 is installed with a spring to return the extrusion wedge block 5 upward; Figure 7 and Figure 9As shown, the wedge-shaped support plate 2 squeezes the frame of the screen mounting frame 102, so that the screen mounting frame 102 rotates with the cross bar 101 as the axis. At the same time, the screen mounting frame 102 rotates and drives the extrusion wedge block 5 connected to the top slidingly to rotate synchronously. The top of the extrusion wedge block 5 will contact and squeeze the top inner wall of the fixed shell 1 during the rotation process, thereby driving the extrusion wedge block 5 to slide downward by extrusion, and the extrusion wedge block 5 will drive the U-shaped groove 501 formed at its bottom to move downward synchronously. Please refer to the embodiment of the present invention. Figure 9 and Figure 10 As shown; the downward movement of the U-shaped groove 501 will be inserted into the outside of the cross bar 101, and the cross bar 101 will be locked in the L-shaped groove formed by the frame of the screen mounting frame 102; therefore, during the rising process of the wedge-shaped supporting plate 2, in order to prevent the friction between the wedge-shaped supporting plate 2 and the frame of the screen mounting frame 102 from being too large, which may cause the screen mounting frame 102 to move up and separate from the cross bar 101, the squeezing wedge block 5 is driven to move downward at the same time as the screen mounting frame 102 rotates. The U-shaped groove 501 formed at the bottom of the squeezing wedge block 5 can lock the cross bar 101 in the L-shaped groove formed by the frame of the screen mounting frame 102, thereby improving the safety of equipment maintenance work.

[0046] like Figure 1 、 Figure 8 and Figure 7 As shown, when the display screen or internal parts installed on the screen mounting frame 102 fail and need to be replaced: since the wedge-shaped support plate 2 has a wedge-shaped surface facing the top of the screen mounting frame 102, the threaded rod 202 rotates forward to drive the wedge-shaped support plate 2 to continue to rise, causing the wedge-shaped surface of the wedge-shaped support plate 2 to gradually fit the frame of the screen mounting frame 102, as shown in FIG. Figure 8 As shown; the screen mounting frame 102 can be rotated to a larger angle through the wedge-shaped support plate 2 and the wedge-shaped surface on its top, and the contact area between the wedge-shaped support plate 2 and the screen mounting frame 102 is increased through the wedge-shaped surface, thereby improving the stability of the support. At this time, the larger angle between the screen mounting frame 102 and the fixed housing 1 can facilitate the staff to replace the internal display screen equipment and other circuits and parts.

[0047] like Figure 2 、 Figure 4 and Figure 5As shown, a locking hook 4 is fixedly installed on the outer wall of the mounting base 3, and the limiting portion of the locking hook 4 extends to the interior of the screen mounting frame 102, and a limiting tube 401 used in conjunction with the limiting portion of the locking hook 4 is installed inside the screen mounting frame 102; that is, the locking hook 4 is U-shaped when viewed from the side, and one end thereof is fixedly connected to the outer wall of the mounting base 3, and can move synchronously with the movement of the mounting base 3; that is, after the above-mentioned staff has completed the maintenance, disassembly and replacement of the equipment on the screen mounting frame 102, the staff can control the motor at the top of the fixed shell 1 to reverse through the switch, and the motor drives the threaded rod 202 to reverse, and the threaded rod 202 drives the slider 201 matched with the external thread and the wedge-shaped support plate 2 fixedly connected to the slider 201 to move downward synchronously; after the wedge-shaped support plate 2 moves downward along the rod length of the threaded rod 202, the screen mounting frame 102 will move downward through its own The screen mounting frame 102 is fixed to the outer wall of the wedge-shaped support plate 2 and rotates at a constant speed to reset. At this time, one end of the lock hook 4 will fall into the opening of the limiting tube 401 fixedly installed on the inner wall of the screen mounting frame 102. The opening diameter of the limiting tube 401 is larger than the end of the lock hook 4 falling into it. Although there is a gap between the two and the screen mounting frame 102 and the fixed shell 1 can be shaken by external force, the limit between the lock hook 4 and the limiting tube 401 is not enough to prevent other personnel except the staff from pulling them apart. Therefore, the limit between the lock hook 4 and the limiting tube 401 can form a limit between the screen mounting frame 102 and the fixed shell 1, thereby preventing the cross bar 101 from being arbitrarily flipped to a large angle, and indirectly protecting the display screen parts and wires on the back of the screen mounting frame 102 from being arbitrarily opened and damaged.

[0048] A method for installing a mounting device for a building monitoring display screen, comprising the following steps:

[0049] Step 1: Use external force to hang the screen mounting bracket 102 on the crossbar 101. Under the action of gravity, the screen mounting bracket 102 rotates around the crossbar 101 as the axis and shrinks inside the fixed housing 1 to achieve the installation of the screen mounting bracket 102.

[0050] Step 2: The wedge-shaped support plate 2 moves upward, driving the rotating plate 301 to rotate and contact and squeeze the frame of the screen mounting frame 102, causing the screen mounting frame 102 to rotate to one side, making it easier to rotate the screen mounting frame 102 out of the fixed housing 1, so as to achieve maintenance, removal, and replacement of the equipment installed on the screen mounting frame 102;

[0051] Step 3: As the wedge-shaped support plate 2 moves upward, its corners contact the frame of the screen mounting frame 102, causing the screen mounting frame 102 to rotate and provide support for the entire screen mounting frame 102, thereby enabling maintenance of the device.

[0052] Step 4: The wedge-shaped block 5 is squeezed and moved downward by the top inner wall of the fixed housing 1 during the rotation of the screen mounting bracket 102 , and the U-shaped groove 501 is inserted into the outside of the crossbar 101 to prevent the screen mounting bracket 102 from being separated from the crossbar 101 ;

[0053] Step 5: The wedge-shaped support plate 2 moves upward to the top of the screen mounting frame 102, and its top wedge-shaped surface fits the frame of the screen mounting frame 102 and limits the screen mounting frame 102 to achieve disassembly and replacement installation of the device.

[0054] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or substitute equivalents for some of the technical features. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A mounting device for a building monitoring display screen, comprising a fixed housing (1) fixed to a wall, a crossbar (101) mounted along the length of the top of the fixed housing (1), and a screen mounting frame (102) rotatably mounted on the crossbar (101); It is characterized in that A vertically movable wedge-shaped support plate (2) is provided inside the fixed housing (1), and the wedge-shaped support plate (2) is used to squeeze the height-direction frame of the screen mounting frame (102) and enable the screen mounting frame (102) to rotate around the crossbar (101) as the axis; A mounting seat (3) is fixedly mounted on the top end of the wedge-shaped support plate (2); a rotating plate (301) is laterally rotatably mounted on the outer wall of the mounting seat (3) via a torsion spring shaft; a height-direction frame of the screen mounting frame (102) is located on the rotational extrusion path of the rotating plate (301); and an extrusion rod (3011) is mounted on the inner wall of the fixed housing (1) and is rotationally extruded with one end of the rotating plate (301).

2. The installation device for a building monitoring display screen according to claim 1, characterized in that: The wedge-shaped supporting plate (2) is formed with a wedge-shaped surface on the top facing the screen mounting frame (102).

3. The installation device for a building monitoring display screen according to claim 1, characterized in that: The top inner walls of both sides of the screen mounting frame (102) are provided with extrusion wedge blocks (5), which can slide along the height direction of the screen mounting frame (102), and the bottom of the extrusion wedge blocks (5) is formed with a U-shaped groove (501) in the direction of the cross bar (101), and the U-shaped groove (501) extends beyond the edge of the extrusion wedge blocks (5).

4. The installation device for a building monitoring display screen according to claim 3, characterized in that: The top of the extrusion wedge block (5) is wedge-shaped and is extruded and matched with the top inner wall of the fixed housing (1). The inner wall of the screen mounting frame (102) is provided with a spring for returning the extrusion wedge block (5) upward.

5. The installation device for a building monitoring display screen according to claim 1, characterized in that: A locking hook (4) is fixedly mounted on the outer wall of the mounting seat (3); a limiting portion of the locking hook (4) extends into the interior of the screen mounting frame (102); and a limiting tube (401) for use with the limiting portion of the locking hook (4) is mounted inside the screen mounting frame (102).

6. The installation device for a building monitoring display screen according to claim 1, characterized in that: A motor is fixedly mounted at the middle of the top of the fixed housing (1); a threaded rod (202) located inside the fixed housing (1) is vertically mounted at the output end of the motor; an external thread of the threaded rod (202) is connected to a slider (201) that moves along the length of the rod; and the wedge-shaped support plate (2) is fixedly mounted on the outer walls of both sides of the slider (201) via a transverse plate.

7. The installation device for a building monitoring display screen according to claim 1, characterized in that: The extrusion rod (3011) is fixedly mounted on the side wall of the fixed housing (1), and the extrusion rod (3011) is arranged in parallel with the cross bar (101).

8. The installation device for a building monitoring display screen according to claim 1, characterized in that: The extrusion rod (3011) is a metal cylinder.

9. A method for installing a mounting device for a building monitoring display screen, applied to the mounting device for a building monitoring display screen according to any one of claims 3-4, characterized in that: Here are the steps: Step 1: The screen mounting frame (102) is hung on the crossbar (101) by an external force, and the screen mounting frame (102) rotates around the crossbar (101) as an axis under the action of gravity and shrinks inside the fixed housing (1), thereby achieving the installation of the screen mounting frame (102); Step 2: The wedge-shaped support plate (2) moves upward, which can drive the rotating plate (301) to rotate and contact and squeeze the frame of the screen mounting frame (102), so that the screen mounting frame (102) rotates to one side, making it easier to rotate the screen mounting frame (102) out of the fixed housing (1), so as to realize the maintenance, disassembly and replacement installation of the equipment installed on the screen mounting frame (102); Step 3: When the wedge-shaped support plate (2) moves upward, its corners contact the frame of the screen mounting frame (102), causing the screen mounting frame (102) to rotate and form support for the entire screen mounting frame (102) to facilitate maintenance of the device; Step 4: The wedge-shaped block (5) is squeezed and moved downward by the top inner wall of the fixed housing (1) during the rotation of the screen mounting frame (102), and the U-shaped groove (501) is inserted into the outside of the crossbar (101) to prevent the screen mounting frame (102) from being separated from the crossbar (101); Step 5: The wedge-shaped support plate (2) moves upward to the top of the screen mounting frame (102), and its top wedge-shaped surface fits the frame of the screen mounting frame (102) and limits the screen mounting frame (102) to achieve the disassembly and replacement installation of the device.

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