Main and auxiliary screen display support

Abstract

The utility model provides a main and auxiliary screen display support which meets the requirements of medical staff for an auxiliary screen display and also meets the requirements of small required space and simple adjustment in space. The main and auxiliary screen displayer support comprises a support stand column and a supporting plate, wherein the support stand column comprises a stand column rod with a top inserting groove and a fixing ring arranged on the peripheral wall of the stand column rod in a protruding mode; the main screen supporting assembly comprises a folding cantilever and a main screen mounting plate, one end of the folding cantilever is inserted into the top slot, and the other end of the folding cantilever is rotatably connected with the main screen mounting plate; the auxiliary screen supporting assembly comprises an auxiliary screen mounting plate and an auxiliary screen supporting arm, the length of the auxiliary screen supporting arm is smaller than that of the folded foldable cantilever, and the auxiliary screen supporting arm comprises a sleeving end and a switching end, the sleeving end is rotatably connected to the stand column rod in a sleeving mode and abuts against the fixing ring, and the switching end is rotatably connected with the auxiliary screen mounting plate.

Description

Technical Field

[0001] The present application relates to the technical field of display accessory manufacturing, and in particular to a main-screen and sub-screen display bracket. Background Art

[0002] With the advent of the information age, computers and the internet have become an essential part of people's lives and work, especially for young and middle-aged people. Monitor stands have emerged as a necessary response. They can meet the space requirements for display screens in various environments, thereby improving work efficiency and creating an ideal living and working space. Monitor stands are now used in all aspects of work, study, and life. Products include single-screen, dual-screen, and large-format spliced ​​screens.

[0003] When doctors perform surgery in an operating room, they need imaging equipment to capture images of the surgical area or lesion. Since a single operation requires the collaborative efforts of multiple medical staff, a secondary monitor is often necessary to accommodate observation by other personnel in the operating room. While existing multi-display stands can meet medical staff's needs for a secondary monitor, the secondary monitor components of these stands cannot simultaneously meet the requirements for a small footprint and easy adjustment. Utility Model Content

[0004] One advantage of the present application is that it provides a main and sub-screen display stand that can meet the needs of medical staff for sub-screen displays while requiring less space.

[0005] Based on this, in order to achieve at least one of the above advantages or other advantages and purposes of the present application, the present application provides a main and secondary screen display bracket, the main and secondary screen display bracket comprising:

[0006] A support column, the support column comprising a column rod having a top slot and a fixing ring protruding from an outer peripheral wall of the column rod;

[0007] a main screen support assembly, comprising a foldable cantilever and a main screen mounting plate, wherein one end of the foldable cantilever is plugged into the top slot, and the other end of the foldable cantilever is rotatably connected to the main screen mounting plate; and

[0008] A secondary screen support assembly, the secondary screen support assembly includes a secondary screen mounting plate and a secondary screen support arm, the length of the secondary screen support arm is less than the length of the folding cantilever after folding, the secondary screen support arm includes a sleeve end rotatably sleeved on the column rod and abutting against the fixed ring, and a transfer end rotatably connected to the secondary screen mounting plate.

[0009] With such an arrangement, the length of the secondary screen support arm is smaller than the length of the foldable cantilever after folding, so that the space required for the secondary screen display can be smaller than the space required for the secondary screen display of the existing multi-screen display bracket. The sleeve end can be rotatably sleeved on the column rod and abut against the fixed ring, so that the secondary screen display can be simply adjusted in space relative to the column rod.

[0010] According to one embodiment of the present application, the auxiliary screen support arm has a stepped through hole opened at the sleeve end and accommodating the fixing ring, so that an inner step abutting against the upper end surface of the fixing ring is formed on the inner peripheral wall of the stepped through hole.

[0011] With such an arrangement, compared with the solution without the inner step, in the solution with the inner step, the stepped through hole of the secondary screen support arm accommodates the fixing ring, making the connection between the secondary screen support assembly and the bracket column more integrated, thereby making the main and secondary screen display brackets less susceptible to environmental interference, and ultimately increasing the service life of the main and secondary screen display brackets.

[0012] According to one embodiment of the present application, the auxiliary screen support assembly further includes an axial end pressure cover fixedly connected to the sleeve end and located within the stepped through hole, and the axial end pressure cover abuts against the lower end surface of the fixing ring.

[0013] Such a configuration allows the secondary screen support assembly to completely accommodate the fixing ring, thereby improving the degree of integration between the secondary screen support assembly and the bracket column, and ultimately increasing the service life of the main and secondary screen display brackets.

[0014] According to one embodiment of the present application, the auxiliary screen support assembly also includes a first nylon gasket and a second nylon gasket, the upper and lower surfaces of the first nylon gasket respectively abut against the auxiliary screen support arm and the fixing ring, and the upper and lower surfaces of the second nylon gasket respectively abut against the shaft end pressure cover and the fixing ring.

[0015] With such an arrangement, the first nylon gasket and the second nylon gasket can serve as a buffer structure, reducing wear on the connection between the fixing ring and the auxiliary screen support arm and the shaft end pressure cover, thereby increasing the service life of the main and auxiliary screen display brackets.

[0016] According to one embodiment of the present application, the fixing ring includes a ring body with a hole, a spring arranged in the hole, and a pair of pins slidably arranged in the hole, and the two pins are respectively abutted against the two ends of the spring to abut against the first nylon gasket and the second nylon gasket under the action of the spring.

[0017] Such an arrangement can increase resistance during the rotation of the auxiliary screen support arm relative to the fixed ring, thereby preventing the auxiliary screen support arm from rotating unnecessarily due to the force exerted by environmental factors.

[0018] According to one embodiment of the present application, the support column further includes a double-row roller slewing bearing mounted to the top slot, and the upper and lower end surfaces of the double-row roller slewing bearing are respectively in contact with the foldable cantilever and the column rod.

[0019] With this arrangement, the double-row roller turntable bearing has two roller rows and can simultaneously withstand loads from two directions. This makes the double-row roller turntable bearing suitable for large load conditions and can improve the load-bearing capacity of the main and auxiliary screen display brackets.

[0020] According to one embodiment of the present application, the bracket column also includes a locking bolt, and the column rod also has a threaded hole connected to the top slot and matching the locking bolt. The main screen support assembly also includes a limiting turntable fixedly connected to one end of the folding cantilever that is inserted into the top slot, and the locking bolt is screwed into the threaded hole to abut against the limiting turntable.

[0021] With such arrangement, the degree to which the locking bolt abuts against the limiting turntable can be adjusted by adjusting the degree to which the locking bolt is screwed into the threaded hole, thereby achieving the functions of rotating and limiting the foldable cantilever relative to the column rod.

[0022] According to one embodiment of the present application, the folding cantilever includes a first main arm, a second main arm, a third main arm and a fourth main arm, and the first main arm, the second main arm, the third main arm, the fourth main arm and the main screen mounting plate are rotatably connected end to end in sequence, and the rotation axis of relative rotation between the first main arm, the second main arm, the third main arm, the fourth main arm and the main screen mounting plate is parallel to the column rod.

[0023] With such arrangement, the foldable cantilever is composed of a plurality of main arms, and the spatial adjustment range of the main screen display is increased by arranging the plurality of main arms.

[0024] According to one embodiment of the present application, the third main arm includes a third arm head rotatably connected to the second main arm, a third arm tail rotatably connected to the main screen support assembly, and a third arm body whose two ends are rotatably connected to the third arm head and the third arm tail respectively, and the rotation axis of relative rotation between the third arm head, the third arm body and the third arm tail is perpendicular to the column rod and the third main arm at the same time.

[0025] Such an arrangement allows the spatial adjustment range of the main screen display to be adjusted not only in the horizontal direction but also in the vertical direction, thereby increasing the spatial adjustment range of the main screen display.

[0026] According to one embodiment of the present application, the secondary screen support arm has a hollow through hole, and the bracket column also includes a wire barrel fixed to the column rod to form a first hollow space connected to the hollow through hole between the wire barrel and the column rod, which is used to hide the cables of the secondary screen display inside.

[0027] With this arrangement, the cables of the secondary screen display can be hidden inside, reducing external cables, thereby reducing the occurrence of cable damage due to some unnecessary environmental problems.

[0028] According to one embodiment of the present application, the foldable cantilever is inserted into one end of the column rod and has a hollow wire hole, the limit turntable is in the shape of a hollow ring, and the column rod has a second hollow space. The wire hole, the limit turntable and the second hollow space are all connected, so that the cables of the main screen display can pass through the inside of the bracket column.

[0029] With such an arrangement, the cables of the main screen display can pass through the inside of the bracket column, reducing external cables, thereby reducing the occurrence of cable damage due to some unnecessary environmental problems. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the conventional technology, the following briefly introduces the drawings required for use in the embodiments or the conventional technology descriptions. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0031] Figure 1 A schematic structural diagram of a main and secondary screen display bracket provided in one embodiment of the present application;

[0032] Figure 2 A schematic structural diagram of the connection between the main screen support assembly and the bracket column according to the above embodiment of the present application is shown;

[0033] Figure 3 A schematic structural diagram of the connection between the secondary screen support assembly and the bracket column according to the above embodiment of the present application is shown;

[0034] Figure 4 A cross-sectional schematic diagram of the connection between the secondary screen support assembly and the fixing ring according to the above embodiment of the present application is shown.

[0035] Figure numerals: 1. Main and sub-screen display bracket; 10. Bracket column; 11. Column rod; 111. Top slot; 112. Second hollow space; 113. Threaded hole; 12. Fixing ring; 121. Ring body; 122. Spring; 123. Pin; 1201. Hole; 13. Wire drum; 131. First hollow space; 14. Double-row roller turntable bearing; 15. Locking bolt; 20. Main screen support assembly; 21. Folding cantilever; 2101. Wire hole; 211. First main arm ; 212, second main arm; 213, third main arm; 2131, third arm head; 2132, third arm body; 2133, third arm tail; 214, fourth main arm; 22, main screen mounting plate; 23, limit turntable; 30, auxiliary screen support assembly; 31, auxiliary screen mounting plate; 32, auxiliary screen support arm; 3201, stepped through hole; 3202, hollow through hole; 321, sleeve end; 322, transfer end; 33, shaft end pressure cover; 34, first nylon gasket; 35, second nylon gasket. DETAILED DESCRIPTION

[0036] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0037] It should be noted that when a component is referred to as being "fixed to" or "disposed on" another component, it may be directly on the other component or there may be a central component. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may be a central component at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in the specification of this application are for illustrative purposes only and do not represent the only implementation method.

[0038] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. Throughout the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0039] In this application, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it can mean that the first feature is directly in contact with the second feature, or the first feature and the second feature are indirectly in contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it can mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is higher in level than the second feature. When a first feature is "below," "below," or "below" a second feature, it can mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is lower in level than the second feature.

[0040] Unless otherwise defined, all technical and scientific terms used in the specification of this application have the same meaning as commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used in the specification of this application includes any and all combinations of one or more of the relevant listed items.

[0041] Considering that the existing multi-screen display stand can meet the needs of medical staff for a secondary screen display, the secondary screen component of the existing multi-screen display stand cannot simultaneously meet the requirements of a small space and simple spatial adjustment. In order to solve this problem, the present application provides a main and secondary screen display stand, which can meet the needs of medical staff for a secondary screen display while also meeting the requirements of a small space and simple spatial adjustment.

[0042] For details, please refer to the attached Figures 1 to 3 One embodiment of the present application provides a main and sub-screen display bracket 1, which may include a bracket column 10, a main screen support assembly 20 and a sub-screen support assembly 30, wherein the bracket column 10 includes a column rod 11 and a fixing ring 12, wherein the column rod 11 has a top slot 111, and the fixing ring 12 is protruding from the outer peripheral wall of the column rod 11; the main screen support assembly 20 includes a folding cantilever 21 and a main screen mounting plate 22, wherein one end of the folding cantilever 21 is plugged into the top slot 111, thereby being connected to the column rod 11 is connected, and the other end of the foldable cantilever 21 is rotatably connected to the main screen mounting plate 22; the auxiliary screen support assembly 30 includes an auxiliary screen mounting plate 31 and an auxiliary screen support arm 32, the length of the auxiliary screen support arm 32 is less than the length of the foldable cantilever 21 after folding, and the auxiliary screen support arm 32 includes a sleeve end 321 and a transition end 322, the sleeve end 321 is rotatably sleeved on the column rod 11 and abuts against the fixing ring 12, and the transition end 322 is rotatably connected to the auxiliary screen mounting plate 31.

[0043] It is worth noting that Figure 1As shown, the length of the secondary screen support arm 32 is smaller than the length of the foldable cantilever 21 after folding, so that the space required for the secondary screen display is smaller than the space required for the secondary screen display of the existing multi-screen display bracket. The sleeve end 321 can be rotatably sleeved on the column rod 11 and abut against the fixed ring 12, so that the secondary screen display can be simply adjusted in space relative to the column rod 11, thereby enabling the main and secondary screen display bracket 1 to meet the needs of medical staff for the secondary screen display while also meeting the needs of small space and simple adjustment in space.

[0044] In particular, if Figure 1 As shown, the main and sub-screen display bracket 1 also includes a base arranged at the lower end of the column rod 11 for installing the main and sub-screen display bracket 1.

[0045] Alternatively, as Figure 1 、 Figure 3 as well as Figure 4 As shown, the auxiliary screen support arm 32 has a stepped through hole 3201 opened at the sleeve end 321 and accommodating the fixing ring 12, so that an inner step is formed on the inner peripheral wall of the stepped through hole 3201 to abut against the upper end surface of the fixing ring 12.

[0046] It is worth noting that Figure 1 、 Figure 3 as well as Figure 4 As shown, compared with the solution without the inner step, in the solution with the inner step, the stepped through hole 3201 of the secondary screen support arm 32 accommodates the fixing ring 12, so that the connection between the secondary screen support assembly 30 and the bracket column 10 is more integrated, thereby making the main and secondary screen display bracket 1 less susceptible to environmental interference, and ultimately increasing the service life of the main and secondary screen display bracket 1.

[0047] Alternatively, as Figure 1 、 Figure 3 as well as Figure 4 As shown, the auxiliary screen support assembly 30 further includes a shaft end pressure cap 33, which is fixedly connected to the sleeve end portion 321 and is located within the stepped through hole 3201. The shaft end pressure cap 33 abuts against the lower end surface of the fixing ring 12. In this way, the auxiliary screen support assembly 30 can fully accommodate the fixing ring 12, improving the degree of integration between the auxiliary screen support assembly 30 and the bracket column 10, and ultimately increasing the service life of the main and auxiliary screen display bracket 1.

[0048] Alternatively, as Figure 1 、 Figure 3 as well as Figure 4As shown, the auxiliary screen support assembly 30 also includes a first nylon gasket 34 and a second nylon gasket 35. The upper and lower surfaces of the first nylon gasket 34 respectively abut against the auxiliary screen support arm 32 and the fixing ring 12, and the upper and lower surfaces of the second nylon gasket 35 respectively abut against the shaft end pressure cover 33 and the fixing ring 12.

[0049] It is worth noting that the first nylon gasket 34 and the second nylon gasket 35 can serve as a buffer structure, thereby reducing the wear at the connection between the fixing ring 12 and the auxiliary screen support arm 32 and the shaft end pressure cover 33, thereby increasing the service life of the main and auxiliary screen display bracket 1.

[0050] Alternatively, as Figure 1 、 Figure 3 as well as Figure 4 As shown, the fixing ring 12 includes a ring body 121 with a hole 1201, a spring 122 disposed in the hole 1201, and a pair of pins 123 slidably disposed in the hole 1201. The spring 122 and the pins 123 are disposed in the hole 1201, and the two pins 123 respectively abut against the two ends of the spring 122, so as to abut against the first nylon washer 34 and the second nylon washer 35 under the action of the spring 122. In this way, resistance can be increased during the rotation of the auxiliary screen support arm 32 relative to the fixing ring 12, preventing the auxiliary screen support arm 32 from rotating unnecessarily due to the force exerted by environmental factors.

[0051] Alternatively, as Figure 1 and Figure 2 As shown, the support column 10 further includes a double-row roller slewing bearing 14 mounted to the top slot 111 , and the upper and lower end surfaces of the double-row roller slewing bearing 14 are respectively in contact with the foldable cantilever 21 and the column rod 11 .

[0052] It is worth noting that the double-row roller slewing bearing 14 has two roller rows and can bear loads from two directions simultaneously. This makes the double-row roller slewing bearing 14 suitable for large load conditions. Using the double-row roller slewing bearing 14 can improve the load-bearing capacity of the main and auxiliary screen display bracket 1.

[0053] Alternatively, as Figure 1 and Figure 2As shown, the bracket column 10 also includes a locking bolt 15, and the column rod 11 also has a threaded hole 113, which is connected to the top slot 111, and the threaded hole 113 matches the locking bolt 15. The main screen support assembly 20 also includes a limiting turntable 23, and the limiting turntable 23 is fixedly connected to the folding cantilever 21 and inserted into one end of the top slot 111. The locking bolt 15 is screwed into the threaded hole 113 to abut against the limiting turntable 23. The degree to which the locking bolt 15 abuts against the limiting turntable 23 can be adjusted by adjusting the degree to which the locking bolt 15 is screwed into the threaded hole 113, thereby realizing the rotation and limiting functions of the folding cantilever 21 relative to the column rod 11.

[0054] Alternatively, as Figure 1 and Figure 2 As shown, the foldable cantilever 21 includes a first main arm 211, a second main arm 212, a third main arm 213, and a fourth main arm 214. The first main arm 211, the second main arm 212, the third main arm 213, the fourth main arm 214, and the main screen mounting plate 22 are rotatably connected end to end in sequence. The rotation axis of relative rotation between the first main arm 211, the second main arm 212, the third main arm 213, the fourth main arm 214, and the main screen mounting plate 22 is parallel to the column rod 11. The foldable cantilever 21 is composed of multiple main arms. By providing multiple main arms, the spatial adjustment range of the main screen display is increased.

[0055] In particular, if Figure 1 As shown, the main screen mounting plate 22 is also provided with a main display handle, which can be used to better adjust the position of the main screen display.

[0056] In particular, according to actual needs, the main screen support component 20 and the sub-screen support component 30 can be used to adjust the spatial positions of the main screen display and the sub-screen display, so as to optimize the user experience.

[0057] In particular, if Figure 1 As shown, the lengths of the first main arm 211 and the third main arm 213 are both greater than the length of the second main arm 212. In this way, when transporting the main and sub-screen display brackets 1, the foldable cantilever 21 can be folded up for storage, thereby reducing the space required for transporting the main and sub-screen display brackets 1 and further reducing transportation costs.

[0058] Alternatively, as Figure 1As shown, the third main arm 213 includes a third arm head 2131 rotatably connected to the second main arm 212, a third arm tail 2133 rotatably connected to the main screen support assembly 20, and a third arm body 2132 whose two ends are rotatably connected to the third arm head 2131 and the third arm tail 2133 respectively. The rotation axis of relative rotation between the third arm head 2131, the third arm body 2132 and the third arm tail 2133 is perpendicular to the column rod 11 and the third main arm 213 at the same time. In this way, the spatial adjustment range of the main screen display can be adjusted not only in the horizontal direction, but also in the longitudinal direction, thereby increasing the spatial adjustment range of the main screen display.

[0059] Alternatively, as Figure 1 、 Figure 3 as well as Figure 4 As shown, the secondary screen support arm 32 has a hollow through hole 3202, and the bracket column 10 also includes a wire barrel 13, which is fixed to the column rod 11 to form a first hollow space 131 between the wire barrel 13 and the column rod 11 that is connected to the hollow through hole 3202, which is used to hide the cables of the secondary screen display inside, thereby reducing external cables and further reducing the occurrence of cable damage due to some unnecessary environmental problems.

[0060] Alternatively, as Figure 1 and Figure 2 As shown, the foldable cantilever 21 is inserted into one end of the column rod 11 and has a hollow wire hole 2101. The limit turntable 23 is in the shape of a hollow ring. The column rod 11 has a second hollow space 112. The wire hole 2101, the limit turntable 23 and the second hollow space 112 are all connected, so that the cables of the main screen display can pass through the inside of the bracket column 10, thereby reducing external cables and further reducing the occurrence of cable damage due to some unnecessary environmental problems.

[0061] For example, the maximum hanging length of the main and sub-screen display bracket 1 for the main screen display can reach 1.3 meters, and on this basis, it can support a display weighing less than 15 kg.

[0062] The technical features of the above embodiments can be combined without changing the basic principles of this application. In order to make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0063] The above embodiments merely illustrate several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person skilled in the art could make various modifications and improvements without departing from the spirit of the present application, all of which fall within the scope of protection of the present application. Therefore, the scope of patent protection for the present application shall be determined by the appended claims.

Claims

1. A main and sub-screen display bracket, characterized in that: The main and secondary screen display brackets include: A support column, the support column comprising a column rod having a top slot and a fixing ring protruding from an outer peripheral wall of the column rod; a main screen support assembly, comprising a foldable cantilever and a main screen mounting plate, wherein one end of the foldable cantilever is plugged into the top slot, and the other end of the foldable cantilever is rotatably connected to the main screen mounting plate; and A secondary screen support assembly, the secondary screen support assembly includes a secondary screen mounting plate and a secondary screen support arm, the length of the secondary screen support arm is less than the length of the folding cantilever after folding, the secondary screen support arm includes a sleeve end rotatably sleeved on the column rod and abutting against the fixed ring, and a transfer end rotatably connected to the secondary screen mounting plate.

2. The main and sub-screen display bracket according to claim 1, characterized in that: The auxiliary screen support arm has a stepped through hole opened at the sleeve end and accommodating the fixing ring, so that an inner step abutting against the upper end surface of the fixing ring is formed on the inner peripheral wall of the stepped through hole.

3. The main and sub-screen display bracket according to claim 2, characterized in that: The auxiliary screen support assembly further includes an axial end pressure cover fixedly connected to the sleeve end and located within the stepped through hole, and the axial end pressure cover abuts against the lower end surface of the fixing ring.

4. The main and sub-screen display bracket according to claim 3, characterized in that: The auxiliary screen support assembly also includes a first nylon gasket and a second nylon gasket. The upper and lower surfaces of the first nylon gasket respectively abut against the auxiliary screen support arm and the fixing ring, and the upper and lower surfaces of the second nylon gasket respectively abut against the shaft end pressure cover and the fixing ring.

5. The main and sub-screen display bracket according to claim 4, characterized in that: The fixing ring includes a ring body with a hole, a spring arranged in the hole, and a pair of pins slidably arranged in the hole. The two pins are respectively abutted against the two ends of the spring to abut against the first nylon gasket and the second nylon gasket under the action of the spring.

6. The main and auxiliary screen display stand according to any one of claims 1 to 5, characterized in that: The support column further comprises a double-row roller slewing bearing mounted to the top slot, wherein the upper and lower end surfaces of the double-row roller slewing bearing are respectively in contact with the foldable cantilever and the column rod.

7. The main and sub-screen display bracket according to claim 6, characterized in that: The bracket column also includes a locking bolt, and the column rod also has a threaded hole connected to the top slot and matching the locking bolt. The main screen support assembly also includes a limit turntable fixedly connected to one end of the folding cantilever that is inserted into the top slot, and the locking bolt is screwed into the threaded hole to abut against the limit turntable.

8. The main and sub-screen display bracket according to claim 1, characterized in that: The folding cantilever includes a first main arm, a second main arm, a third main arm and a fourth main arm. The first main arm, the second main arm, the third main arm, the fourth main arm and the main screen mounting plate are rotatably connected end to end in sequence. The rotation axis of relative rotation between the first main arm, the second main arm, the third main arm, the fourth main arm and the main screen mounting plate is parallel to the column rod.

9. The main and sub-screen display bracket according to claim 8, characterized in that: The third main arm includes a third arm head rotatably connected to the second main arm, a third arm tail rotatably connected to the main screen support assembly, and a third arm body whose two ends are rotatably connected to the third arm head and the third arm tail respectively. The rotation axis of relative rotation between the third arm head, the third arm body and the third arm tail is perpendicular to the column rod and the third main arm.

10. The main and auxiliary screen display stand according to any one of claims 7 to 9, characterized in that: The secondary screen support arm has a hollow through hole, and the bracket column also includes a wire barrel fixed to the column rod to form a first hollow space connected to the hollow through hole between the wire barrel and the column rod, which is used to hide the cables of the secondary screen display inside.

11. The main and sub-screen display bracket according to claim 7, characterized in that: The foldable cantilever is plugged into one end of the column rod and has a hollow wire hole. The limit turntable is in the shape of a hollow ring. The column rod has a second hollow space. The wire hole, the limit turntable and the second hollow space are all connected, so that the cables of the main screen display can pass through the inside of the bracket column.

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