CN113432001A

CN113432001A - Display screen adjusting device suitable for exhibitions exhibition frame

Info

Publication number: CN113432001A
Application number: CN202110731213.1A
Authority: CN
Inventors: 杨瑞; 徐维东; 李娟�; 邓广山; 高瑞娟
Original assignee: Chongqing City Management College
Current assignee: Chongqing City Management College
Priority date: 2021-06-30
Filing date: 2021-06-30
Publication date: 2021-09-24

Abstract

The invention provides a display screen adjusting device suitable for a exhibition and exhibition frame, which comprises a mounting seat and an assembly adjusting seat for fixing a display screen, wherein the mounting seat is movably connected with the assembly adjusting seat through a folding arm, and an adjusting mechanism for adjusting the angle of the assembly adjusting seat is arranged on the mounting seat; the assembly adjusting seat is provided with an installation groove, a turntable capable of driving the display screen to rotate is arranged in the installation groove, and the assembly adjusting seat is provided with a limiting mechanism used for locking the rotation angle of the turntable; a lifting self-locking mechanism capable of being fixed on the display rack is arranged on one side, away from the adjusting mechanism, of the mounting seat; the adjusting mechanism can adjust the corresponding playing angle of the display screen arranged on the assembling adjusting seat, and can prevent the screen from reflecting light; the limiting mechanism can limit the rotatable turntable; the lifting self-locking mechanism not only can achieve the purposes of convenient installation and interaction with a viewer, but also can lock the device at an expected position.

Description

Display screen adjusting device suitable for exhibitions exhibition frame

Technical Field

The invention relates to the technical field of automobile display racks, in particular to a display screen adjusting device suitable for a exhibitions rack.

Background

With the development of the times, automobiles have become essential transportation tools in people's lives for a long time, the automobile exhibition is an important way for people to know novel automobiles, when a large-scale automobile exhibition is held, the appearance and the performance of the automobile are shown by setting up an exhibition shelf, and a display screen is arranged on the exhibition shelf after the setting up for playing advertisements, so that the automobile performance and the automobile price can be introduced very clearly, the appearance of the exhibition shelf can be improved, the visual effect of the exhibition shelf is prevented from being influenced by the exposure of the structure of the exhibition shelf, and the exhibition shelf is more attractive; however, the angle of the display screen mounted on the existing display rack cannot be adjusted, the effect of playing advertisements is poor due to the influence of light, and the eyeballs of people cannot be fully attracted, so that the angle-adjustable display rack display screen hanging device is provided, and the technical problem which needs to be solved is solved.

Disclosure of Invention

The invention provides a display screen adjusting device suitable for a exhibition and exhibition frame, which mainly aims to improve the playing effect of advertisements by adjusting the angle of a display screen, enable a display screen fixing device to be conveniently installed through a lifting self-locking mechanism, and interact with a viewer through a lifting function, enable the lifting mechanism to be more stable through the self-locking function, and effectively prevent the display screen from falling to cause danger due to part damage caused by overload.

According to the technical problem, the following technical scheme is proposed:

the invention provides a display screen adjusting device suitable for a exhibition and exhibition frame, which comprises a mounting seat and an assembly adjusting seat for fixing a display screen, wherein the mounting seat is movably connected with the assembly adjusting seat through a folding arm, and an adjusting mechanism for adjusting the angle of the assembly adjusting seat is arranged on the mounting seat; the assembly adjusting seat is provided with an installation groove, a turntable capable of driving the display screen to rotate is arranged in the installation groove, and the assembly adjusting seat is provided with a limiting mechanism used for locking the rotation angle of the turntable; a lifting self-locking mechanism capable of being fixed on the display rack is arranged on one side, away from the adjusting mechanism, of the mounting seat; the adjusting mechanism can adjust the corresponding playing angle of the display screen arranged on the assembling adjusting seat, and can prevent the screen from reflecting light; the limiting mechanism can limit the rotatable turntable to obtain an expected rotation angle; the lifting self-locking mechanism not only can achieve the purposes of convenient installation and interaction with a viewer, but also can lock the device at an expected position to prevent the display screen from falling or being out of control in lifting due to damage of parts caused by gravity overload.

Furthermore, the adjusting mechanism comprises a first screw rod and a rotary supporting seat which is used for being matched with the first screw rod to rotate, the rotary supporting seat is fixed on the mounting seat, and two ends of the first screw rod can be respectively and rotatably mounted in the rotary supporting seat; a first guide groove and a first sliding part which can be slidably arranged in the first guide groove are arranged on the mounting seat along the length direction of the first lead screw, and the first sliding part is sleeved on the first lead screw and forms a first lead screw nut kinematic pair with the first lead screw; the assembling and adjusting seat is connected with the first sliding part through a transmission rod, an installing support lug is arranged on one side, away from the installing seat, of the first sliding part, one end of the transmission rod is hinged to the installing support lug, and one end, away from the first sliding part, of the transmission rod is fixedly connected with the assembling and adjusting seat; the first sliding part slides in the first guide groove through the rotation of the first screw rod, and can drive the assembly adjusting seat to move along the folding direction of the folding arm through the transmission rod so as to adjust the angle of the assembly adjusting seat; the screw nut kinematic pair structure is arranged, so that the adjustment is more stable and accurate; the design is simple, the production is easier in process, and the cost is reduced in manufacturing.

Furthermore, the limiting mechanism comprises a bolt with a first elastic element and positioning holes uniformly distributed on the periphery of the rotary table, a bolt hole communicated with the mounting groove is formed in the periphery of the assembly adjusting seat, the bolt hole can be enabled to be opposite to one positioning hole through the rotation of the rotary table, the bolt is mounted on the bolt hole and inserted into the corresponding positioning hole so as to lock the position of the rotary table in the mounting groove; set to the bolt structure and can conveniently change the part when stop gear damages, also can replace the screw rod with other bolts, it is more convenient, quick when the installation.

Further, the lifting self-locking mechanism comprises a sliding guide device and a second sliding part capable of lifting along the sliding guide device, one side, close to the installation seat, of the second sliding part is fixedly connected with the installation seat, one side, far away from the installation seat, of the second sliding part is installed in a second guide groove vertically formed in the sliding guide device, and the second sliding part is lifted in the sliding guide device through the second guide groove; the second sliding part is provided with a mounting hole, a second screw rod is arranged in the mounting hole, two ends of the second screw rod are rotatably mounted at two ends of the sliding guide device, and the second sliding part is sleeved on the second screw rod and forms a second screw rod nut kinematic pair with the second screw rod; lock tongues are arranged on two sides of the second sliding part, a fixed plate and a movable plate which extend vertically are arranged on two sides of the sliding guide device, the lock tongues are simultaneously supported on corresponding side edges of the fixed plate and the movable plate, and lock grooves matched with the lock tongues are formed in the side edges of the fixed plate and the movable plate, which are close to the lock tongues; the movable plate is provided with a guide strip-shaped hole, the fixed plate is provided with a guide sliding block matched with the guide strip-shaped hole, the guide sliding block is butted with the guide strip-shaped hole, and the movable plate is slidably arranged on one side of the fixed plate; a motor is arranged at one end of the second screw rod, and a motor shaft of the motor is fixedly connected with the second screw rod and can drive the second screw rod to synchronously rotate with the second screw rod; the bottom of the sliding guide device is provided with an air cylinder, and a piston rod of the air cylinder is connected with the movable plate so as to drive the movable plate to slide relative to the fixed plate; when the locking groove of the fixed plate corresponds to the locking groove of the movable plate, the lock tongue can extend into the locking groove to lock the second sliding part, so that the second sliding part can only ascend but cannot descend; when the locking groove of the fixed plate is staggered with the locking groove of the movable plate through the movement of the movable plate, the lock tongue is supported on the outer edges of the movable plate and the fixed plate and cannot enter the locking groove to lock the second sliding part, and then the second sliding part can freely lift on the sliding guide device.

Furthermore, a second elastic element is arranged on the bolt, and the second elastic element is a torsion spring which can reset the bolt and extend into the lock groove; through the characteristics of the torsion spring, the spring bolt has certain acting force on the second sliding part, so that the spring bolt generates relative force with the movable plate and the fixed plate, and when the locking grooves of the movable plate and the fixed plate correspond, the spring bolt enters the locking grooves through the acting force of the torsion spring to lock the second sliding part.

Furthermore, two sides of the second screw rod are provided with guide circular pipes, the guide circular pipes are arranged in guide holes formed in the second sliding part, and two ends of each guide circular pipe are fixedly connected with two ends of the sliding guide device respectively; the guide circular tube is used for assisting the second guide groove in guiding the second sliding part, the structure of the second sliding part is also stabilized, and the load-carrying performance of the structure is improved.

Furthermore, the inner part of the mounting hole on the first sliding part is provided with an internal thread which is in threaded fit with the first screw rod; the structure of the device is firmer and not easy to damage due to the arrangement of thread matching, and the device is prevented from being incapable of rotating due to internal dislocation.

Furthermore, a circle of annular rotating groove is formed in the inner wall of the mounting hole of the first sliding component, and balls capable of rotating in a manner of being matched with the threaded structure of the first screw rod are arranged in the rotating groove; the setting is the ball screw structure and makes the rotation regulation more accurate, also avoids producing the noise when operating.

Furthermore, the first elastic element is a tension spring arranged between the bolt hole and the bolt, one end of the tension spring abuts against a bolt cap of the bolt, and the other end of the tension spring abuts against one end, close to the rotary table, of the bolt hole, so that the bolt separated from the positioning hole can be reset; when the bolt needs to be rotated, the screw rod only needs to be pulled out, the screw rod is released after the screw rod is rotated to a required angle, and the screw rod automatically resets and enters the corresponding bolt hole.

Furthermore, the hole wall of each positioning hole is provided with an internal thread structure capable of being in threaded fit with a bolt, the first elastic element is a pressure spring arranged between the bolt hole and the bolt, and the pressure spring can eject the bolt separated from the positioning hole; when needs rotate, when rotating the screw rod and breaking away from the bolt hole, pressure spring can pop out the screw rod, and is more convenient when dismantling or changing the part to make its structure more firm.

Compared with the prior art, the display screen adjusting device suitable for the exhibition shelf has the advantages that the angle is adjusted through the assembling adjusting seat and the display screen adjusting device can rotate, so that the playing content is more attractive to eyes, information to be played is better popularized, the angle can be rotated, the visual effect of watching can be integrally reflected, and the influence on the playing effect caused by the angle problem of the display screen is effectively prevented; the installation lifting self-locking mechanism enables the display screen fixing device to be installed conveniently, can interact with a viewer, and can be locked to prevent the lifting component from falling off due to the fact that the lifting component bears overweight.

Drawings

Fig. 1 is a schematic structural diagram of a display screen adjusting device suitable for an exhibition stand according to the present invention;

FIG. 2 is an enlarged view of the first guide groove and the first slide member in the embodiment;

FIG. 3 is a schematic view of the internal structure of the assembly adjustment base in the embodiment;

FIG. 4 is a partial enlarged view of the stopper mechanism in the embodiment;

FIG. 5 is an installation view of the self-locking mechanism for lifting in the embodiment;

fig. 6 is a structural installation view of the second guide groove and the second slide member in the embodiment.

Detailed Description

The present invention will be further described with reference to the following examples and the accompanying drawings.

The invention provides a display screen adjusting device suitable for a exhibition and exhibition frame, which comprises a mounting seat 1 and an assembly adjusting seat 2 for fixing a display screen, wherein the mounting seat 1 is connected with the assembly adjusting seat 2 through a folding arm 16, and the assembly adjusting seat 2 can adjust the angle on the mounting seat 1 through the folding arm 16, so that the angle of the display screen arranged on the assembly adjusting seat 2 can be adjusted towards the folding direction of the folding arm 16 when the display screen is used, preferably, the folding arm 16 is folded through a hinge shaft; install the adjustment mechanism who connects assembly regulation seat 2 on mount pad 1, be convenient for adjust the angle of assembly regulation seat 2, make the broadcast effect of installing the display screen on the exhibition frame promote, can not make the screen can not see the content of broadcast because of the reflection of light because of the influence of light.

Referring to fig. 1 and 2, the adjusting mechanism includes two rotation supporting seats 13 for mounting a first lead screw 12, two ends of the first lead screw 12 are respectively fixed in the rotation supporting seats 13, the first lead screw 12 can rotate in the rotation supporting seats 13, the adjusting mechanism further includes a first guiding groove 11a and a first sliding part 11 which are mutually matched, the first sliding part 11 is mounted in the first guiding groove 11a and is sleeved on the first lead screw 12 to be mutually matched with a thread structure on the first lead screw 12, and when the first lead screw 12 rotates, the first sliding part 11 can slide in the first guiding groove 11a to a thread rotation direction on the first lead screw 12 under the mutual matching action of the thread structures; the first sliding part 11 is provided with an installation support lug 11b, the installation support lug 11b is movably connected with a transmission rod 14 through a hinge shaft, the other end of the transmission rod 14 is rigidly connected with the assembly adjusting seat 2, the transmission rod 14 is extended or pulled back to the assembly adjusting seat 2 through the sliding of the first sliding part 11 in the first guide groove 11a, and the assembly adjusting seat 2 is fixed at a corresponding angle for adjusting the angle of the assembly adjusting seat 2.

An internal thread structure matched with the thread structure on the first screw rod 12 can be arranged in the first sliding part 11, a first screw rod nut kinematic pair is formed under the matching of the internal thread structure and the external thread structure of the first screw rod 12, the first screw rod 12 is rotated to enable the first sliding part 11 to do linear reciprocating motion in the first guide groove 11a along the length direction of the first screw rod 12, and the transmission rod 14 can be driven to support the assembly adjusting seat 2 at different positions;

preferably, an annular rotation groove may also be disposed inside the first sliding member 11, the rotation grooves are matched to form a circulation channel, a ball matched with the thread structure on the first screw 12 is disposed in the rotation groove, the ball rolls in the channel in a circulating manner, two ends of the first sliding member 11 are sealed to prevent the ball from falling out of the first sliding member 11, when the first screw 12 rotates as a driving body, the first sliding member 11 will be converted into a linear motion along a corresponding lead according to a rotation angle of the first screw 12, so as to implement a linear reciprocating motion in the first guide groove 11a along a length direction of the first screw 12.

Referring to fig. 3, preferably, an installation groove 22 is formed in the assembly adjustment seat 2, a rotating disc 21 capable of rotating in the installation groove 22 is installed in the installation groove 22 and used for further adjusting an angle after a display screen is hung on the rotating disc, a limiting mechanism is further arranged in the installation groove 22 and comprises a positioning hole 21a formed in the rotating disc 21, the positioning hole 21a is arranged on the periphery of the rotating disc 21, a bolt hole 24 communicated with the installation groove 22 is formed in the periphery of the assembly adjustment seat 2, a bolt 23 is installed on the bolt hole 24 and serves as a positioning bolt of the rotating disc 21, and when the bolt 23 is inserted into the positioning hole 21a, the rotating disc 21 can be locked in the installation groove 22.

Preferably, the bolt 23 is fixed in the plug hole 24 by a first elastic element 25, the first elastic element 25 is preferably a tension spring, one end of the tension spring abuts on the nut of the bolt 23, and the other end abuts in the plug hole 24; when the display screen angle adjusting device is used, the bolt 23 is pulled out, the bolt hole 24 is in butt joint with the positioning hole 21a through rotation of the rotary table 21, the screw rod on the bolt 23 is reset and inserted into the positioning hole 21a to lock the rotary table 21 under the action of the elastic component when the screw rod 23 is released, the bolt 23 is arranged into a plugging structure, the display screen angle adjusting device is convenient and fast to adjust the display screen to a preset angle.

The bolt 23 and the positioning hole 21a may also be configured to be in threaded fit, the first elastic element 25 is a pressure spring, one end of the pressure spring abuts against a nut of the bolt 23, and the other end of the pressure spring abuts against the plug pin hole 24, when the bolt 23 rotates to be separated from the positioning hole 21a, the pressure spring ejects the bolt 23 out of the plug pin hole 24, so that the disassembly is more convenient; the design of the thread fit ensures that the bolt 23 is more stably connected with the positioning hole 21a, and the safety is improved.

Referring to fig. 1, a driving part 15 is arranged at one end of the first lead screw 12, the driving part 15 can drive the first lead screw 12 to rotate in the rotary supporting seat 13, so that the first sliding part 11 is matched with the first lead screw 12 to slide in the first guide groove 11a, and the driving transmission rod 14 supports the assembly adjusting seat 2 to adjust a corresponding angle; the driving part 15 is preferably a rotating handle, and when the first screw rod 12 needs to be driven, the handle is only required to be manually rotated for adjustment; may also be arranged to be electrically driven.

The rotary table 21 is provided with hooks 21b for fixing the display screen, the number of the hooks 21b is preferably 3, the hooks are distributed on the rotary table 21 in an equilateral triangle structure, and the display screen can be better stabilized by using the triangle structure, so that the display screen cannot swing after being installed, the display screen is prevented from falling or deviating, and the assembly safety is ensured; preferably, the hook 21b is an L-shaped structure, and the L-shaped structure is configured to match with a mounting hole provided on the display screen.

Referring to fig. 5 and 6, one side of the mounting base 1 away from the adjusting mechanism is provided with a lifting self-locking mechanism capable of being fixed on the display rack, the lifting self-locking mechanism can lift the display screen on the display rack, and the lifting self-locking mechanism has a self-locking structure, so that the display screen is effectively prevented from falling due to the fact that the lifting mechanism is too heavy to bear and lose control.

The lifting self-locking mechanism comprises a sliding guide device 3 and a second sliding part 33 capable of lifting along the sliding guide device 3, one side, close to the mounting seat 1, of the second sliding part 33 is fixedly connected with one side, far away from the adjusting mechanism, of the mounting seat 1, one side, far away from the mounting seat 1, of the second sliding part is installed in a second guide groove 33c vertically arranged in the sliding guide device 3, and the second sliding part 33 can slide up and down in the sliding guide device 3 through the second guide groove 33c to complete lifting.

The second sliding part 33 is provided with a mounting hole, a second screw rod 31 is arranged in the mounting hole, and two ends of the second screw rod 31 are rotatably arranged at two ends of the sliding guide device 3; preferably, two sides of the second screw rod 31 are provided with guide circular pipes 32, and the guide circular pipes 32 are installed on guide holes formed on the second sliding member 33, are fixedly connected with two ends of the sliding guide device 3, and are used for supporting the second sliding member 33, preventing the second sliding member 33 from deviating from the sliding direction due to the influence of gravity during sliding, and further performing sliding guide; the second screw nut kinematic pair composed of the second sliding member 33 and the second screw 31 has the same structure as the first screw nut kinematic pair composed of the first sliding member 11 and the first screw 12 in the adjusting mechanism, and therefore, not described in detail, the second screw 31 can drive the second sliding member to move up and down in the sliding guide device 3 along the length direction of the second screw 31 by rotating; preferably, one end of the second screw rod 31 is provided with a motor 37, and an output shaft of the motor 37 is fixedly connected with one end of the second screw rod 31, so as to drive the second screw rod 31 to rotate.

The utility model discloses a lock bolt, including first sliding part 33, second sliding part 33, fixed plate 34, spring bolt 33a and fixed plate 34, the spring bolt 33a all installs the spring bolt 33a that can rotate in the both sides of second sliding part 33, the both sides of slip guiding device 3 are provided with vertical extension's fixed plate 34, the lateral margin of spring bolt 33a and fixed plate 34 corresponds each other, set up the locked groove with cooperation spring bolt 33a on the fixed plate 34 is close to one side outer fringe of spring bolt 33a, the locked groove is one-way groove structure, in spring bolt 33a stretched into the locked groove, make second sliding part 33 only can the upwards slip, and unable lapse.

Preferably, a movable plate 35 is disposed on the outer side of the fixed plate 34, an air cylinder 36 is connected to one end of the movable plate 35, the air cylinder is fixed to the bottom of the sliding guide device 3, a guide slider 34a is disposed on the fixed plate 34, a guide strip-shaped hole 35a capable of being matched with the guide slider 34a is formed in the movable plate 35, and the guide slider 34a is installed in the guide strip-shaped hole 35a in a butt joint manner; the movable plate 35 can move up and down on the outer side of the fixed plate 34 by the driving of the cylinder and the guiding of the guiding strip-shaped hole 35a, a locking groove with the same structure as the fixed plate 34 is formed in the outer edge of one side of the movable plate 35 close to the lock tongue 33a, when the cylinder 36 drives the movable plate 35 to move and stagger the locking groove with the locking groove in the fixed plate 34 one by one, the locking groove in the movable plate 35 corresponds to the outer edge of the fixed plate 34, the locking groove in the fixed plate 34 corresponds to the outer edge of the movable plate 35, when the second sliding part 33 slides, the lock tongue 33a is always supported on the outer edge of the fixed plate 34 or the movable plate 35 and cannot enter the locking groove, and then the second sliding part can freely lift up and down along the sliding guiding device 3.

The latch 33a is provided with a second elastic element 33b, and is mounted on both sides of the second sliding part 33 in a hinged manner, the second elastic element 33b is preferably a torsion spring, one end of the torsion spring is connected with the second sliding part 33, and the other end of the torsion spring is connected with the latch 33a, when the locking grooves of the fixed plate 34 and the movable plate 35 correspond to each other, the latch 33a can automatically extend into the locking groove under the action of the torsion spring to lock the second sliding part 33.

Reference is made above in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described above with reference to the drawings are exemplary and intended to be illustrative of the invention and are not to be construed as limiting the invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

Finally, it should be noted that the above-mentioned description is only a preferred embodiment of the present invention, and those skilled in the art can make various similar representations without departing from the spirit and scope of the present invention.

Claims

1. The utility model provides a display screen adjusting device suitable for exhibitions frame which characterized in that: the display screen assembling device comprises an installation seat (1) and an assembling and adjusting seat (2) used for fixing a display screen, wherein the installation seat (1) is movably connected with the assembling and adjusting seat (2) through a folding arm (16), and an adjusting mechanism used for adjusting the angle of the assembling and adjusting seat (2) is installed on the installation seat (1); the assembling and adjusting seat (2) is provided with an installation groove (22), a turntable (21) capable of driving the display screen to rotate is arranged in the installation groove (22), and the assembling and adjusting seat (2) is provided with a limiting mechanism used for locking the rotation angle of the turntable (21); one side of the mounting seat (1) far away from the adjusting mechanism is provided with a lifting self-locking mechanism which can be fixed on the display rack.

2. The display screen adjusting device suitable for the exhibitions frame as claimed in claim 1, wherein: the adjusting mechanism comprises a first screw rod (12) and a rotating support seat (13) which is used for being matched with the first screw rod (12) to rotate, the rotating support seat (13) is fixed on the mounting seat (1), and two ends of the first screw rod (12) can be respectively and rotatably mounted in the rotating support seat (13); a first guide groove (11a) and a first sliding part (11) which can be slidably installed in the first guide groove (11a) are arranged on the installation base (1) along the length direction of the first screw rod (12), and the first sliding part (11) is sleeved on the first screw rod (12) and forms a first screw rod nut kinematic pair together with the first screw rod (12); the assembling and adjusting seat (2) is connected with the first sliding part (11) through a transmission rod (14), an installing support lug (31) is arranged on one side, away from the installing seat (1), of the first sliding part (11), one end of the transmission rod (14) is hinged to the installing support lug (31), and one end, away from the first sliding part (11), of the transmission rod (14) is fixedly connected with the assembling and adjusting seat (2); the first sliding part (11) slides in the first guide groove (11a) through the rotation of the first screw rod (12), and the assembly adjusting seat (2) can be driven to move along the folding direction of the folding arm (16) through the transmission rod (14) so as to adjust the angle of the assembly adjusting seat (2).

3. The display screen adjusting device suitable for the exhibition stand according to claim 1 or 2, wherein: the limiting mechanism comprises a bolt (23) with a first elastic element (25) and positioning holes (21a) uniformly distributed on the periphery of the rotary disc (21), a bolt hole (24) communicated with the mounting groove (22) is formed in the periphery of the assembly adjusting seat (2), the bolt hole (24) can be enabled to be opposite to one positioning hole (21a) through the rotation of the rotary disc (21), the bolt (23) is mounted on the bolt hole (24) and inserted into the corresponding positioning hole (21a) so as to lock the position of the rotary disc (21) in the mounting groove (22).

4. The display screen adjusting device suitable for the exhibitions frame as claimed in claim 1, wherein: the lifting self-locking mechanism comprises a sliding guide device (3) and a second sliding part (33) capable of lifting along the sliding guide device (3), one side, close to the mounting seat (1), of the second sliding part (33) is fixedly connected with the mounting seat (1), one side, far away from the mounting seat (1), of the second sliding part (33) is installed in a second guide groove (33c) vertically formed in the sliding guide device (3), and the second sliding part (33) lifts in the sliding guide device (3) through the second guide groove (33 c); the second sliding part (33) is provided with a mounting hole, a second screw rod (31) is arranged in the mounting hole, two ends of the second screw rod (31) are rotatably arranged at two ends of the sliding guide device (3), and the second sliding part (33) is sleeved on the second screw rod (31) and forms a second screw rod nut kinematic pair with the second screw rod (31); lock tongues (33a) are mounted on two sides of the second sliding part (33), a fixed plate (34) and a movable plate (35) which extend vertically are arranged on two sides of the sliding guide device (3), the lock tongues (33a) are supported on corresponding side edges of the fixed plate (34) and the movable plate (34), and lock grooves matched with the lock tongues (33a) are formed in the side edges, close to the lock tongues (33a), of the fixed plate (34) and the movable plate (34); a guide strip-shaped hole (35a) is formed in the movable plate (35), a guide sliding block (34a) matched with the guide strip-shaped hole (35a) is arranged on the fixed plate (34), the guide sliding block (34) is in butt joint with the guide strip-shaped hole (35a), and the movable plate (35) is slidably mounted on one side of the fixed plate (34); a motor (37) is mounted at one end of the second screw rod (31), and a motor shaft of the motor (37) is fixedly connected with the second screw rod (31) and can drive the second screw rod (31) to synchronously rotate with the second screw rod; the bottom of the sliding guide device (3) is provided with an air cylinder (36), and a piston rod of the air cylinder (36) is connected with the movable plate (35) so as to drive the movable plate (35) to slide relative to the fixed plate (34).

5. The display screen adjusting device suitable for the exhibitions frame as claimed in claim 4, wherein: the lock tongue (33a) is provided with a second elastic element (33b), and the second elastic element (33b) can reset the lock tongue (33a) to extend into the lock groove; the second elastic element (33b) is a torsion spring.

6. The display screen adjusting device suitable for the exhibitions frame as claimed in claim 4, wherein: and guide circular tubes (32) are arranged on two sides of the second screw rod (31), the guide circular tubes (32) are arranged in guide holes formed in the second sliding component (33), and two ends of each guide circular tube (32) are fixedly connected with two ends of the sliding guide device (3) respectively.

7. The display screen adjusting device suitable for the exhibitions frame as claimed in claim 2, wherein: the inner part of the mounting hole on the first sliding component (11) is provided with an internal thread which is in threaded fit with the first screw rod (12).

8. The display screen adjusting device suitable for the exhibitions frame as claimed in claim 2, wherein: the inner wall of the mounting hole of the first sliding component (11) is provided with a circle of annular rotating groove, and a ball capable of rotating in a manner of matching with a threaded structure of the first screw rod (12) is arranged in the rotating groove.

9. The display screen adjusting device suitable for the exhibitions frame as claimed in claim 3, wherein: the first elastic element (25) is provided with a tension spring arranged between the bolt hole (24) and the bolt (23), one end of the tension spring is abutted against a bolt cap of the bolt (23), and the other end of the tension spring is abutted against one end of the bolt hole close to the rotary disc (21), so that the bolt (23) separated from the positioning hole (21a) can be reset.

10. The display screen adjusting device suitable for the exhibitions frame as claimed in claim 3, wherein: the hole wall of each positioning hole (21a) is provided with an internal thread structure capable of being in threaded fit with the bolt (23), the first elastic element (25) is provided with a pressure spring arranged between the bolt pin hole (24) and the bolt (23), and the pressure spring can eject the bolt (23) separated from the positioning hole (21 a).