Advertisement mounting frame convenient to replace

Abstract

The invention discloses an advertisement mounting rack convenient to replace, and relates to the technical field of mounting racks, the advertisement mounting rack comprises a base assembly, two groups of adjusting support assemblies are arranged at the upper end of the base assembly, and two groups of mounting assemblies are arranged between the adjusting support assemblies and the base assembly; a mounting block is fixedly mounted between the two adjusting support assemblies, a top plate is arranged at the upper ends of the two adjusting support assemblies, and a supporting assembly is arranged on the rear side of the mounting block. The supporting assembly comprises a mounting box fixedly connected to one side of the mounting block, a driving motor is arranged in the mounting box, a rotating rod is rotationally connected to one side of the mounting box, a main telescopic rod is fixedly connected to one side of the rotating rod, and an auxiliary supporting block is arranged at one end of the main telescopic rod. And the directions of an auxiliary supporting block and a supporting mechanism on the rear side of the device are adjusted, so that a supporting assembly better assists a mounting frame to support and fix the advertising board, and the application range of the device is widened.

Description

Technical Field

[0001] The invention relates to the technical field of mounting frames, in particular to an advertisement mounting frame which is convenient to replace. Background Art

[0002] An advertising mount is a device used to fix and display advertising images or billboards. It is usually made of metal or plastic and has a variety of types and functions. Advertising mounts usually include door-type display racks, floor-standing display racks, stainless steel folding A-shaped display racks, and X-shaped display racks. Display racks are mainly composed of supporting bases, columns, bracket plates and other accessories. Traditional advertising mounts are fixed, and different billboards have different heights. Traditional mounting brackets are not convenient for adjusting the height of the frame, and thus are not convenient for replacing billboards of different heights. They cannot meet the use requirements of more customers. Now, a conveniently replaced advertising mount is needed.

[0003] On this basis, Chinese patent application number CN202011590138.3 discloses an advertising display stand that is easy to install, including a mounting slide bar, a base frame is welded at the bottom end between the two mounting slide bars, and a slide groove is provided on the adjacent surface of the mounting slide bar. The operator can fix and install it with bolts. When in use, it is only necessary to insert the threaded rod into the corresponding threaded sleeve, and finally achieve the technical effect of its installation;

[0004] However, there are some shortcomings in the use of this patent application: since different billboards have different sizes and weights, the staff is required to adjust the mounting frame in multiple directions to facilitate the installation of different billboards. The traditional advertising mounting frame has a simple structure and function, and the bracket assembly is a fixed structure, which is not convenient for adjusting the frame, limiting the scope of use of the device and failing to meet the needs of more customers.

[0005] In view of the above problems, a conveniently replaceable advertising mounting frame is proposed. Summary of the invention

[0006] The purpose of the present invention is to provide an easily replaceable advertising mounting frame. By adopting the device to work, the problem that different billboards have different sizes and weights, and the staff need to adjust the mounting frame in multiple directions to achieve the effect of facilitating the installation of different billboards, while the traditional advertising mounting frame has a simple structure and function, and the bracket assembly is a fixed structure, which is not convenient for adjusting the frame, limiting the scope of use of the device and failing to meet the needs of more customers.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an easily replaceable advertising mounting frame, comprising a base assembly, an adjusting bracket assembly is arranged on the upper end of the base assembly, and the adjusting bracket assembly is arranged in two groups, a mounting assembly is arranged between the adjusting bracket assembly and the base assembly, and the mounting assembly is arranged in two groups, a mounting block is fixedly installed between the two groups of the adjusting bracket assemblies, a top plate is arranged on the upper ends of the two groups of the adjusting bracket assemblies, and a supporting assembly is arranged on the rear side of the mounting block; the supporting assembly comprises a mounting box fixedly connected to one side of the mounting block, a driving motor is arranged inside the mounting box, a rotating rod is rotatably connected to one side of the mounting box, a main telescopic rod is fixedly connected to one side of the rotating rod, an auxiliary supporting block is arranged at one end of the main telescopic rod, and the auxiliary supporting block is rotatably connected to one end of the main telescopic rod;

[0008] The mounting assembly comprises a concave block fixedly connected to the top of the base assembly, and slots are arranged on both sides of the concave block. A driving box is slidably connected to the top of the base assembly, and the driving box and the concave block match each other. A turntable is rotatably connected to one side of the driving box, and both sides of the driving box are slidably connected to clamping blocks, and the clamping blocks match the slots, and the clamping blocks are clamped and connected inside the slots.

[0009] The adjusting bracket assembly includes an outer cavity block fixedly connected to the top of the driving box, a lifting block is slidably connected to the inner cavity of the outer cavity block, a locking column is fixedly connected to the top of the lifting block, a micro motor is arranged on the outside of the outer cavity block, a first bevel gear is rotatably connected to the bottom of the inner cavity of the outer cavity block, the first bevel gear is connected to the output end of the micro motor, a second bevel gear is meshedly connected to one side of the first bevel gear, and the second bevel gear is rotatably connected to the inner cavity of the outer cavity block.

[0010] Preferably, the support assembly further comprises a support plate fixedly connected to the interior of the installation box, one side of the support plate is rotatably connected to a rotating column, and the outer periphery of the rotating column is fixedly connected to a gear ring component.

[0011] Preferably, one end of the rotating rod passes through the supporting plate and is fixedly connected to the rotating column, a limiting plate is fixedly connected inside the mounting box, and two groups of limiting plates are provided, a rack block is slidably connected between the two groups of limiting plates, and the rack block is meshingly connected to the gear ring component.

[0012] Preferably, a first screw rod is rotatably connected inside the installation box, the first screw rod is connected to the output end of the driving motor, and the rack block is threadedly connected to the outer periphery of the first screw rod.

[0013] Preferably, the mounting assembly also includes a second pulley rotatably connected to the inside of the drive box, a connecting rod is fixedly connected between the second pulley and the turntable, a forward and reverse screw rod is rotatably connected to the inside of the drive box, and the two groups of clamping blocks are respectively slidably connected to the outer periphery of the two ends of the forward and reverse screw rods.

[0014] Preferably, a first pulley is fixedly connected to the middle portion of the forward and reverse screw rods, and a belt component is sleeved between the first pulley and the second pulley.

[0015] Preferably, the adjusting bracket assembly further comprises a second screw rod fixedly connected to the upper end of the second bevel gear, and the lifting block is threadedly connected to the second screw rod.

[0016] Preferably, the two groups of mounting blocks are fixedly connected between the two groups of outer cavity blocks, and a billboard can be fixedly mounted on the front side of the mounting block.

[0017] Preferably, both sides of the top plate are provided with assembly holes, the assembly holes match the engaging columns, and the engaging columns are engaged and connected inside the assembly holes.

[0018] Preferably, the top plate is snap-connected with the two groups of snap-fit ​​columns.

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

[0020] 1. When the device is in use, first fix the billboard on the front side of the mounting block on the device, then move the device to the location where it needs to be displayed, fix the base assembly on the ground, and then use the support assembly on the rear side of the mounting block to assist in supporting the billboard. The operator can adjust the position of the auxiliary support block supporting the ground according to the weight of the billboard and the installation environment, start the drive motor in the installation box, and the drive motor drives the first screw rod to rotate forward or reverse, and then the rack block will move horizontally to the left or right, and then the rack block drives the gear ring component to move forward or reverse. The main telescopic rod can be extended or retracted as needed to adjust the specific length of the main telescopic rod, so that after the main telescopic rod is adjusted in position, the auxiliary support block at the bottom can still be supported on the ground. This arrangement allows the device to adjust the position of the auxiliary support block and the supporting mechanism on the rear side of the device according to the specific installation environment, so that the supporting assembly can better assist the mounting frame to support and fix the billboard, thereby improving the application range of the device.

[0021] 2. When the operator uses the device, if he needs to install billboards of different heights, he needs to adjust the height of the equipment. The user can adjust the height of the two sets of adjustable bracket assemblies. The operator can turn on the two sets of micro motors at the same time. The two sets of micro motors rotate forward or reverse at the same time, and then the first bevel gear, the second bevel gear and the second screw rod at the corresponding position of the micro motor rotate, and then the two sets of second screw rods rotate forward or reverse at the same time, and then the second screw rod will drive the lifting block to move upward or downward, and then the lifting block will drive the top plate to move up and down. The height of the two sets of adjustable bracket assemblies is lifted and adjusted. After the bracket is adjusted to the appropriate height, the two sets of micro motors are turned off. This operation allows the frame height of the installation equipment to be adjusted to meet the needs of installing billboards of different heights. This setting enables the device to have adjustable height performance, which is convenient for users to replace and install billboards of different heights to meet the needs of more customers.

[0022] 3. When the user wants to perform maintenance and disassembly work on the device, the operator can first pull the top plate away from the adjusting bracket assembly with force, so that the locking column is completely disengaged from the assembly hole of the top plate, and the top plate is first removed from the device, and then use two sets of installation components to rotate the two sets of turntables in opposite directions. The reverse rotation of the turntables will drive the second pulley, the first pulley and the positive and negative screw rods to rotate in opposite directions at the same time, and then the two sets of clamping blocks will shrink toward the inside of the drive box, and the clamping blocks will completely disengage from the card slots and shrink into the inside of the drive box. Finally, pull the adjusting bracket assembly in the direction away from the concave block to separate the drive box from the concave block. The user can completely disassemble the two sets of adjusting bracket assemblies from the base assembly, and the mounting frame is disassembled into a pair of unit assemblies, which is convenient for subsequent maintenance, inspection and transportation of the device. This setting is convenient for users to disassemble the advertising mounting frame, and then convenient for operators to maintain and carry the advertising mounting frame, and the disassembly and installation method is simple to operate. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0024] Figure 2 It is a structural diagram of the support assembly of the present invention;

[0025] Figure 3 It is a structural diagram of the internal driving mechanism of the installation box of the present invention;

[0026] Figure 4 It is a structural diagram of the mounting assembly, the adjusting bracket assembly, the base assembly, the mounting block and the top plate of the present invention;

[0027] Figure 5 It is a structural diagram of the mounting assembly, the adjusting bracket assembly, the base assembly and the top plate of the present invention;

[0028] Figure 6 It is a structural diagram of the top plate installation mechanism of the present invention;

[0029] Figure 7 It is a structural diagram of the driving mechanism of the adjusting bracket assembly of the present invention;

[0030] Figure 8 It is a structural diagram of the installation assembly of the present invention;

[0031] Fig. 9 It is a structural diagram of the drive box of the present invention;

[0032] Fig.10 It is the internal structure diagram of the drive box of the present invention.

[0033] In the figure: 1, base assembly; 2, adjustment bracket assembly; 3, installation assembly; 4, support assembly; 11, top plate; 12, installation block; 41, installation box; 42, rotating rod; 43, main telescopic rod; 44, auxiliary support block; 411, support plate; 412, rotating column; 413, gear ring component; 414, first screw rod; 415, limiting plate; 416, rack block; 13, engaging column; 21, outer cavity block; 22, lifting block; 23, micro motor; 24, first bevel gear; 25, second bevel gear; 26, second screw rod; 31, concave block; 32, slot; 33, drive box; 34, turntable; 35, engaging block; 36, positive and negative screw rod; 37, first pulley; 38, belt component; 39, second pulley. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0035] In order to further understand the content of the present invention, the present invention is described in detail in conjunction with the accompanying drawings.

[0036] Combination Figure 1-Figure 10, an advertising mounting frame that is easy to replace, includes a base assembly 1, an adjusting bracket assembly 2 is arranged on the upper end of the base assembly 1, and the adjusting bracket assembly 2 is arranged in two groups, a mounting assembly 3 is arranged between the adjusting bracket assembly 2 and the base assembly 1, and the mounting assembly 3 is arranged in two groups, a mounting block 12 is fixedly installed between the two groups of adjusting bracket assemblies 2, a top plate 11 is arranged on the upper ends of the two groups of adjusting bracket assemblies 2, and a supporting assembly 4 is arranged on the rear side of the mounting block 12; the supporting assembly 4 includes a mounting box 41 fixedly connected to one side of the mounting block 12, a driving motor is arranged inside the mounting box 41, a rotating rod 42 is rotatably connected to one side of the mounting box 41, a main telescopic rod 43 is fixedly connected to one side of the rotating rod 42, an auxiliary support block 44 is arranged at one end of the main telescopic rod 43, and the auxiliary support block 44 is rotatably connected to one end of the main telescopic rod 43;

[0037] The mounting assembly 3 includes a concave block 31 fixedly connected to the top of the base assembly 1, and slots 32 are arranged on both sides of the concave block 31. A driving box 33 is slidably connected to the top of the base assembly 1, and the driving box 33 and the concave block 31 match each other. A turntable 34 is rotatably connected to one side of the driving box 33, and both sides of the driving box 33 are slidably connected to the card blocks 35, and the card blocks 35 match each other with the card slots 32, and the card blocks 35 are engaged and connected inside the card slots 32;

[0038] The adjusting bracket assembly 2 includes an outer cavity block 21 fixedly connected to the top of the driving box 33, a lifting block 22 is slidably connected to the inner cavity of the outer cavity block 21, a locking column 13 is fixedly connected to the top of the lifting block 22, a micro motor 23 is arranged on the outside of the outer cavity block 21, a first bevel gear 24 is rotatably connected to the bottom of the inner cavity of the outer cavity block 21, the first bevel gear 24 is connected to the output end of the micro motor 23, a second bevel gear 25 is meshedly connected to one side of the first bevel gear 24, and the second bevel gear 25 is rotatably connected to the inner cavity of the outer cavity block 21.

[0039] The present invention will be further described below in conjunction with the embodiments.

[0040] Embodiment 1:

[0041] This embodiment discloses the following technical solutions: Figure 1-Figure 4 As shown, the support assembly 4 also includes a support plate 411 fixedly connected to the inside of the installation box 41, a rotating column 412 is rotatably connected to one side of the support plate 411, a gear ring component 413 is fixedly connected to the outer periphery of the rotating column 412, one end of the rotating rod 42 passes through the support plate 411 and is fixedly connected to the rotating column 412, a limiting plate 415 is fixedly connected to the inside of the installation box 41, and two groups of limiting plates 415 are provided, a rack block 416 is slidably connected between the two groups of limiting plates 415, the rack block 416 is meshed with the gear ring component 413, a first screw rod 414 is rotatably connected to the inside of the installation box 41, the first screw rod 414 is connected to the output end of the driving motor, and the rack block 416 is threadedly connected to the outer periphery of the first screw rod 414.

[0042] Embodiment 2:

[0043] This embodiment discloses the following technical solutions: Figure 4-Figure 7 As shown, the adjustment bracket assembly 2 also includes a second screw rod 26 fixedly connected to the upper end of the second bevel gear 25, the lifting block 22 is threadedly connected to the second screw rod 26, the two groups of mounting blocks 12 are fixedly connected between the two groups of outer cavity blocks 21, the front side of the mounting block 12 can be fixedly installed with a billboard, assembly holes are provided on both sides of the top plate 11, the assembly holes and the snap-fit ​​columns 13 match each other, the snap-fit ​​columns 13 are snap-fitted and connected to the inside of the assembly holes, and the top plate 11 is snap-fitted and connected to the two groups of the snap-fit ​​columns 13.

[0044] Embodiment 3:

[0045] This embodiment discloses the following technical solutions: Figure 8-Figure 10 As shown, the mounting assembly 3 also includes a second pulley 39 rotatably connected to the inside of the drive box 33, a connecting rod is fixedly connected between the second pulley 39 and the turntable 34, a forward and reverse screw rod 36 is rotatably connected to the inside of the drive box 33, two sets of clamping blocks 35 are respectively slidably connected to the outer periphery of the two ends of the forward and reverse screw rod 36, a first pulley 37 is fixedly connected to the middle part of the forward and reverse screw rod 36, and a belt component 38 is sleeved between the first pulley 37 and the second pulley 39.

[0046] To sum up: when the device is used, the billboard is first fixedly installed on the front side of the mounting block 12 on the device, and then the device is moved to the place where it needs to be displayed, and the base assembly 1 is fixedly supported on the ground, and then the support assembly 4 on the rear side of the mounting block 12 is used to assist in supporting the billboard. The operator can adjust the position of the auxiliary support block 44 supporting the ground according to the weight of the billboard and the installation environment, and start the drive motor in the installation box 41. The drive motor drives the first screw rod 414 to rotate forward or reverse, and then the rack block 416 will move horizontally to the left or right, and then the rack block 416 drives the gear ring component 413 to move forward or The rotation of the rotating column 412 and the rotating rod 42 is reversed, and then the rotating column 412 and the rotating rod 42 are rotated forward or reversely at the same time, and the rotation of the rotating rod 42 drives the main telescopic rod 43 and the auxiliary support block 44 to adjust the position. At the same time, the user can extend and retract the main telescopic rod 43 as needed, and then adjust the specific length of the main telescopic rod 43, so that after the main telescopic rod 43 is adjusted, the auxiliary support block 44 at the bottom can still be supported on the ground. This arrangement allows the device to adjust the position of the auxiliary support block 44 and the supporting mechanism at the rear side of the device according to the specific installation environment, so that the support assembly 4 can better assist the mounting frame to support and fix the billboard, thereby improving the application range of the device;

[0047] When the operator uses the device, if he needs to install billboards of different heights, he needs to adjust the height of the device. The user can adjust the height of the two sets of adjustable bracket assemblies 2. The operator can turn on the two sets of micro motors 23 at the same time. The two sets of micro motors 23 rotate forward or reverse at the same time, and then the first bevel gear 24, the second bevel gear 25 and the second screw rod 26 at the corresponding position of the micro motor 23 rotate, and then the two sets of second screw rods 26 rotate forward or reverse at the same time, and then the second screw rod 26 will drive the lifting block 22 to move upward or downward, and then the lifting block 22 will drive the top plate 11 to also move up and down. The height of the two sets of adjustable bracket assemblies 2 is lifted and adjusted. After the bracket is adjusted to the appropriate height, the two sets of micro motors 23 are turned off. This operation allows the frame height of the installation device to be adjusted to meet the needs of installing billboards of different heights. This setting enables the device to have adjustable height performance, which is convenient for users to replace and install billboards of different heights to meet the needs of more customers.

[0048] When the user wants to perform maintenance and disassembly work on the device, the operator can first pull the top plate 11 away from the adjustment bracket assembly 2 with force, so that the locking column 13 is completely disengaged from the assembly hole of the top plate 11, and the top plate 11 is first removed from the device, and then the two sets of installation components 3 are used to rotate the two sets of turntables 34 in the opposite direction. The reverse rotation of the turntable 34 will drive the second pulley 39, the first pulley 37 and the forward and reverse screw rods 36 to rotate in the opposite direction at the same time, and then the two sets of clamping blocks 35 will shrink toward the inside of the drive box 33, and the clamping blocks 35 will be completely removed. The entire frame is disengaged from the card slot 32 and retracted into the driving box 33, and finally the adjusting bracket assembly 2 is pulled away from the concave block 31, so that the driving box 33 and the concave block 31 are separated. The user can completely separate the two sets of adjusting bracket assemblies 2 and the base assembly 1, and the mounting frame is disassembled into a pair of unit assemblies, which is convenient for subsequent maintenance, inspection and transportation of the device. This arrangement is convenient for users to disassemble the advertising mounting frame, and then convenient for operators to maintain and transport the advertising mounting frame, and the disassembly and installation method is simple to operate.

[0049] It should be noted that the above-mentioned electrical components are equipped with power supplies and their control methods are prior art. In order to avoid redundant description, they are uniformly described here; and this application is mainly used to protect mechanical equipment, so the control method and circuit connection are no longer explained in detail. In this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprises" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0050] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An easily replaceable advertising mounting frame, comprising a base assembly (1), characterized in that: An adjusting bracket assembly (2) is arranged at the upper end of the base assembly (1), and the adjusting bracket assembly (2) is provided with two groups. A mounting assembly (3) is arranged between the adjusting bracket assembly (2) and the base assembly (1), and the mounting assembly (3) is provided with two groups. A mounting block (12) is fixedly installed between the two groups of the adjusting bracket assemblies (2). A top plate (11) is arranged at the upper ends of the two groups of the adjusting bracket assemblies (2). A supporting assembly (4) is arranged at the rear side of the mounting block (12); the supporting assembly (4) comprises a mounting box (41) fixedly connected to one side of the mounting block (12), a driving motor is arranged inside the mounting box (41), a rotating rod (42) is rotatably connected to one side of the mounting box (41), a main telescopic rod (43) is fixedly connected to one side of the rotating rod (42), an auxiliary supporting block (44) is arranged at one end of the main telescopic rod (43), and the auxiliary supporting block (44) is rotatably connected to one end of the main telescopic rod (43); The mounting assembly (3) comprises a concave block (31) fixedly connected to the top of the base assembly (1), and slots (32) are arranged on both sides of the concave block (31). A driving box (33) is slidably connected to the top of the base assembly (1), and the driving box (33) and the concave block (31) are matched with each other. A turntable (34) is rotatably connected to one side of the driving box (33), and both sides of the driving box (33) are slidably connected with a clamping block (35), and the clamping block (35) and the slots (32) are matched with each other, and the clamping block (35) is clamped and connected inside the slots (32); The adjusting bracket assembly (2) comprises an outer cavity block (21) fixedly connected to the top of the driving box (33); a lifting block (22) is slidably connected to the inner cavity of the outer cavity block (21); a locking column (13) is fixedly connected to the top of the lifting block (22); a micro motor (23) is arranged on the outer side of the outer cavity block (21); a first bevel gear (24) is rotatably connected to the bottom of the inner cavity of the outer cavity block (21); the first bevel gear (24) is connected to the output end of the micro motor (23); a second bevel gear (25) is meshedly connected to one side of the first bevel gear (24); and the second bevel gear (25) is rotatably connected to the inner cavity of the outer cavity block (21).

2. The conveniently replaceable advertising mounting frame according to claim 1, characterized in that: The support assembly (4) further comprises a support plate (411) fixedly connected to the interior of the installation box (41), one side of the support plate (411) is rotatably connected to a rotating column (412), and the outer periphery of the rotating column (412) is fixedly connected to a gear ring component (413).

3. The conveniently replaceable advertising mounting frame according to claim 2, characterized in that: One end of the rotating rod (42) passes through the supporting plate (411) and is fixedly connected to the rotating column (412); a limiting plate (415) is fixedly connected inside the installation box (41), and two groups of limiting plates (415) are provided. A rack block (416) is slidably connected between the two groups of limiting plates (415), and the rack block (416) is meshedly connected with the gear ring component (413).

4. The conveniently replaceable advertising mounting frame according to claim 3, characterized in that: A first screw rod (414) is rotatably connected inside the installation box (41), the first screw rod (414) is connected to the output end of the drive motor, and the rack block (416) is threadedly connected to the outer periphery of the first screw rod (414).

5. The conveniently replaceable advertising mounting frame according to claim 4, characterized in that: The mounting assembly (3) further comprises a second pulley (39) rotatably connected to the interior of the driving box (33); a connecting rod is fixedly connected between the second pulley (39) and the rotating disk (34); a positive and negative threaded rod (36) is rotatably connected to the interior of the driving box (33); and two groups of the clamping blocks (35) are respectively slidably connected to the outer periphery of both ends of the positive and negative threaded rod (36).

6. The conveniently replaceable advertising mounting frame according to claim 5, characterized in that: A first belt pulley (37) is fixedly connected to the middle of the forward and reverse threaded rod (36), and a belt component (38) is sleeved between the first belt pulley (37) and the second belt pulley (39).

7. The conveniently replaceable advertising mounting frame according to claim 6, characterized in that: The adjusting bracket assembly (2) further comprises a second screw rod (26) fixedly connected to the upper end of the second bevel gear (25), and the lifting block (22) is threadedly connected to the second screw rod (26).

8. The conveniently replaceable advertising mounting frame according to claim 7, characterized in that: The two groups of mounting blocks (12) are fixedly connected between the two groups of outer cavity blocks (21), and a billboard can be fixedly mounted on the front side of the mounting block (12).

9. The conveniently replaceable advertising mounting frame according to claim 8, characterized in that: Both sides of the top plate (11) are provided with assembly holes, the assembly holes and the engaging columns (13) match each other, and the engaging columns (13) are engaged and connected inside the assembly holes.

10. The conveniently replaceable advertising mounting frame according to claim 9, characterized in that: The top plate (11) is engaged and connected with two groups of the engaging columns (13).

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