CN113638947B

CN113638947B - Quick locking mechanism of LED display screen box

Info

Publication number: CN113638947B
Application number: CN202110887111.9A
Authority: CN
Inventors: 卢毅; 石建功; 刘海样; 巫程龙
Original assignee: Shenzhen Mary Photoelectricity Co ltd
Current assignee: Shenzhen Mary Photoelectricity Co ltd
Priority date: 2021-08-03
Filing date: 2021-08-03
Publication date: 2022-12-23
Anticipated expiration: 2041-08-03
Also published as: CN113638947A

Abstract

The invention discloses a quick locking mechanism for an LED display screen box body, which comprises a first fixing component and a second fixing component which are respectively arranged on two unit box bodies, wherein the first fixing component comprises an installation shell, a threaded pressing block and a rotating piece; the second fixing component comprises a screw and a limiting sleeve, the limiting sleeve is installed at one end of the screw, the limiting sleeve supports against the other unit box body, the screw penetrates through the two unit box bodies and extends into the space between the two threaded pressing blocks through the mounting hole to be abutted against the two threaded pressing blocks, and the screw is in threaded fit with one side opposite to the two threaded pressing blocks. This application has the efficiency that improves the staff and carry out the dismouting to two unit boxes to be convenient for overhaul the effect of maintaining to two unit boxes of splicing mutually.

Description

Quick locking mechanism of LED display screen box

Technical Field

The invention relates to the field of display screen box body installation, in particular to a quick locking mechanism for an LED display screen box body.

Background

With the increasingly wide application of LED fixed display screens and leased display screens at present, the requirements on the universality, the installation and the daily maintenance of fastening devices connected between display screen boxes are also increasingly high.

Large-scale LED display screen among the correlation technique comprises a plurality of LED display screens usually, and each LED display screen usually includes the unit box and installs in the display screen panel of unit box, connects two unit boxes usually when a plurality of LED display screens splice mutually, and two unit boxes of connection are fixed usually through a plurality of bolts.

In view of the above-mentioned related technologies, the inventor thinks that two unit box bodies fixed by bolts need to be repeatedly screwed by tools during disassembly and assembly, which is cumbersome to operate, has low disassembly and assembly efficiency, and is inconvenient to overhaul and maintain the two unit box bodies spliced with each other.

Disclosure of Invention

In order to improve the efficiency that the staff carries out the dismouting to two unit boxes to be convenient for overhaul and maintain two unit boxes of splicing mutually, this application provides a quick locking mechanism of LED display screen box.

The application provides a quick locking mechanism of LED display screen box adopts following technical scheme:

a quick locking mechanism for an LED display screen box body comprises a first fixing assembly and a second fixing assembly which are respectively installed on two unit box bodies, wherein the first fixing assembly comprises an installation shell, threaded press blocks and a rotating piece;

the second fixing component comprises a screw and a limiting sleeve, the limiting sleeve is installed at one end of the screw, the limiting sleeve supports against the other unit box body, the screw penetrates through the two unit box bodies and extends into the space between the two threaded pressing blocks through the installation hole to be in contact with the two threaded pressing blocks, and the screw is in threaded fit with one side opposite to the two threaded pressing blocks.

Through adopting above-mentioned technical scheme, when connecting two unit boxes, at first rotate towards the direction of keeping away from each other through rotating two screw thread briquetting of piece drive, wear to locate two unit boxes and mounting hole in proper order with the screw rod afterwards and lie in between two screw thread briquetting, reset rotating the piece afterwards, make screw rod and two screw thread piece inconsistent, rotate threaded rod to stop collar afterwards and support the state of tight one of them unit box, thereby realize being connected between two adjacent unit boxes, rotate two screw thread briquetting and insert the screw rod to setting up between two screw thread briquetting and make the screw rod can directly stretch into to being close to its position after two unit boxes are fixed, thereby be convenient for realize the high-speed joint to two unit boxes.

When two unit boxes are connected, need not to twist the bolt through the instrument is changeed soon repeatedly, thereby be favorable to improving the efficiency that the staff carries out the dismouting to between two unit boxes, be convenient for overhaul and maintain two unit boxes of concatenation mutually, simultaneously, when connecting two great size unit boxes, the fixed subassembly of first fixed subassembly and second can be pre-installed respectively in two unit boxes set up be convenient for realize the quick connection to two great size unit boxes, in addition, the fixed subassembly of first mounting and second can also realize fixing between the different thickness unit boxes, and the suitability is strong.

Optionally, screw thread briquetting fixedly connected with dwang and gag lever post, the dwang rotates to be installed in the installation shell, the installation shell is seted up and is supplied gag lever post pivoted installation spacing hole, it includes swivel becket and the portion of gripping to rotate the piece, the swivel becket with the coaxial setting of installation shell and with the installation shell rotate be connected, the swivel becket is seted up and is supplied gag lever post pivoted to rotate the spacing hole and supply the hole of sliding that the dwang slided, the portion of gripping fixed connection is in the outer peripheral face of swivel becket.

Through adopting above-mentioned technical scheme, thereby when rotating to the drive swivel becket of the portion of gripping application of force, the gag lever post drives the screw thread briquetting and revolutes the axis rotation of pole of rotating under the limiting displacement who installs spacing hole and rotate spacing hole to realize the motion of two screw thread briquetting orientation each other, and then be convenient for insert the screw rod to between two screw thread briquetting, the simple structure of staff drive two screw thread briquetting motion is made in the setting of gag lever post and the portion of gripping, convenient operation.

Optionally, the number of the holding portions is two, the two holding portions are located on the same horizontal line, the mounting shell is provided with two holding limiting grooves, and the two holding portions are located in the two holding limiting grooves respectively and are in sliding fit with the holding limiting grooves.

Through adopting above-mentioned technical scheme, the setting up of two portions of gripping makes the staff can rotate the spacing ring in the both sides of spacing ring horizontal direction to be favorable to guaranteeing the stability when the spacing ring rotates, simultaneously, the setting up of two spacing grooves of gripping plays two portions of gripping further limiting displacement when rotating, thereby is convenient for rotate the portion of gripping to required position.

Optionally, the first fixing component further comprises a torsion spring, and the torsion spring is used for resetting the rotating piece.

Through adopting above-mentioned technical scheme, rotate and rotate the direction motion that makes two screw thread briquetting court keep away from each other to insert the screw rod to between two screw thread briquetting, loosen and rotate the piece, rotate and can reset automatically under the spring action of torsional spring, thereby be favorable to further simple and convenient staff to carry out the operation of installing to two unit boxes, simultaneously, the torsional spring be provided with and do benefit to the stability of guaranteeing to rotate the back position that resets.

Optionally, the apron is installed at the top of installation shell, the screw thread briquetting, rotate piece and torsional spring all are located between installation shell and the apron, the one end of torsional spring is connected in rotating piece, the other end and is connected in the apron.

Through adopting above-mentioned technical scheme, the apron plays the cover to screw thread briquetting, rotation piece and torsional spring and closes the guard action to be favorable to guaranteeing the life of screw thread briquetting, rotation piece and torsional spring, simultaneously, be convenient for realize the installation to the torsional spring, and make the torsional spring after the installation difficult to touch with other parts mutually.

Optionally, the second fixing assembly further comprises a limiting part installed on another unit box body, the screw rod is provided with a sliding limiting groove extending along the axial direction of the screw rod, a free end of the screw rod, which is close to the limiting sleeve, is provided with a rotating groove which is annularly arranged and is communicated with the sliding limiting groove, and the limiting part is matched with the sliding limiting groove and the rotating groove in a sliding manner.

Through adopting above-mentioned technical scheme, when the locating part stretched into to the spacing inslot that slides, the locating part played the limiting displacement when moving screw rod along vertical direction to be favorable to guaranteeing the screw rod and insert the stability when mounting hole along vertical direction motion, the setting of rotating groove is difficult for interfering with the locating part when making the screw rod insert to rotate between two screw thread briquettings, thereby is convenient for realize the rotation of screw rod.

Optionally, the second fixing assembly further comprises a return spring, and the return spring is arranged between the limiting sleeve and the other unit box body.

Through adopting above-mentioned technical scheme, thereby reset spring makes two screw thread briquetting move towards the direction of keeping away from each other to the elasticity of stop collar when removing the spacing to the screw rod, and the screw rod can break away from between two screw thread briquetting fast under reset spring's elasticity to the staff of being further convenient for dismantles two unit boxes.

Optionally, the screw rod fixedly connected with locating lever, the stop collar has seted up and corresponds with the locating lever position and with the locating lever grafting complex constant head tank, the stop collar is connected with handle portion.

Through adopting above-mentioned technical scheme, the locating lever plays the positioning action when installing screw rod and stop collar with the cooperation of constant head tank to the staff of being convenient for installs screw rod and stop collar, and the setting of handle portion is convenient for the staff application of force and is rotated the stop collar.

Optionally, the positioning assembly comprises a mounting plate, a threaded rod, a clamping plate and a clamping piece, the clamping piece is used for clamping and fixing the mounting plate to one of the unit boxes, the threaded rod is in threaded connection with the mounting plate, the clamping plate is fixedly connected to one end of the mounting plate, the two unit boxes are spliced, and when the mounting plate is fixed to one of the unit boxes through the clamping piece, the two unit boxes are abutted to one side of the mounting plate, and the clamping plate is abutted to one side, facing the other unit box, of the clamping piece away from the other unit box.

Through adopting above-mentioned technical scheme, two unit box concatenations just are fixed in one of them unit box with locating component through the holder to revolve to twist the threaded rod and make when supporting tight board and supporting tight unit box, the position between two unit boxes is preliminary fixed, thereby is favorable to guaranteeing the stability of its position after two unit boxes are stable fixed, thereby the holder makes the holder can follow the reuse of unit box and pull down the realization to the holder to the centre gripping of one of them unit box is fixed.

Optionally, the clamping piece includes a rotating seat, a clamping plate and a reset coil spring, the rotating seat is rotatably connected to the mounting plate, the clamping plate is hinged to the rotating seat, and the reset coil spring is used for enabling the clamping plate to rotate towards the direction abutting against the mounting plate.

Through adopting above-mentioned technical scheme, press the clamp plate and keep away from one side of mounting panel and make the clamp plate towards the direction motion of keeping away from the mounting panel, arrange one of them unit box in between clamp plate and the mounting panel afterwards and loosen the clamp plate and can make one of them unit box fixed mutually with the mounting panel, the setting of rotating the seat makes to support the clamp plate and can rotate to and have the great state of placing the clearance between the mounting panel to be convenient for arrange the unit box in the fixed position of mounting panel, the suitability is strong.

In summary, the present application includes at least one of the following beneficial technical effects:

1. connect between two unit boxes, rotate two screw thread briquetting and insert the screw rod to setting up between two screw thread briquetting and make the screw rod can directly stretch into to being close to its position after fixing two unit boxes, thereby be convenient for realize the high-speed joint to two unit boxes, need not to twist the bolt repeatedly through the instrument at this in-process, thereby be favorable to improving the efficiency that the staff carries out the dismouting between two unit boxes, be convenient for overhaul and maintain two unit boxes of concatenation mutually.

2. The rotation piece can reset automatically under the spring action of the torsion spring, so that the operation of installing the two unit box bodies by further simple and convenient workers is facilitated, and meanwhile, the torsion spring is favorable for guaranteeing the stability of the position of the rotation piece after reset.

3. When the locating part stretches into to the spacing inslot that slides, the locating part plays the limiting displacement to the screw rod along vertical direction motion to be favorable to guaranteeing the stability when the screw rod inserts the mounting hole along vertical direction motion.

Drawings

Fig. 1 is a schematic view of the overall structure of embodiment 1 of the present application.

Fig. 2 is an exploded view of the first fixing member and the second fixing member in embodiment 1 of the present application.

Fig. 3 is a partially enlarged schematic view of a portion a in fig. 2.

Fig. 4 is a schematic view showing a state before the rotary member rotates in embodiment 1 of the present application.

Fig. 5 is a schematic view of a state in which a rotor rotates in embodiment 1 of the present application.

Fig. 6 is a partially enlarged schematic view of a portion B in fig. 2.

FIG. 7 is a schematic view, partially in section, of a first fixation assembly and a second fixation assembly in an embodiment of the present application.

Fig. 8 is a schematic structural view of a positioning assembly in embodiment 2 of the present application.

Fig. 9 is a partially sectional view schematically showing a mounting plate in embodiment 2 of the present application.

Description of reference numerals:

1. a first case; 2. a second case; 3. mounting a shell; 4. pressing a threaded block; 5. a rotating member; 501. a rotating ring; 502. a grip portion; 6. a torsion spring; 7. a cover plate; 8. mounting holes; 9. a first through hole; 10. rotating the rod; 11. a limiting rod; 12. a sliding hole; 13. installing a limiting hole; 14. rotating the limiting hole; 15. a protective pad; 16. a holding limiting groove; 17. a screw; 18. a position limiting sleeve; 19. a return spring; 20. a stopper; 21. a second through hole; 22. a sliding limiting groove; 23. a rotating groove; 24. positioning a rod; 25. positioning a groove; 26. a bolt of the screw rod; 27. a handle portion; 28. mounting a plate; 281. a first plate body; 282. a second plate body; 283. a third plate body; 29. a threaded rod; 30. a resisting plate; 31. a clamping member; 311. a rotating seat; 312. a clamping plate; 313. a reset coil spring; 32. a handwheel.

Detailed Description

The present application is described in further detail below with reference to figures 1-9.

Example 1.

The embodiment of the application discloses quick locking mechanism of LED display screen box. Referring to fig. 1 and 2, the quick locking mechanism for the led display screen box body comprises a first fixing component and a second fixing component, the first fixing component and the second fixing component are respectively installed on two unit box bodies, the two unit box bodies are both frame-shaped structures with the same external dimension, the two unit box bodies need to be spliced with each other when in use, and the two unit box bodies which are spliced with each other are respectively set as a first box body 1 and a second box body 2.

Referring to fig. 2 and 3, first fixed subassembly is including installation shell 3, screw thread briquetting 4, rotate piece 5, torsional spring 6 and apron 7, installation shell 3 is the inboard of rectangular distribution through four bolt fixed mounting in first box 1, installation shell 3 sets up the mounting hole 8 that runs through the setting, first through-hole 9 that runs through and be linked together with mounting hole 8 is seted up to first box 1, so that arrange adapting unit in installation shell 3 through first through-hole 9 and mounting hole 8, the one end that first box 1 was kept away from to installation shell 3 is the opening form.

Referring to fig. 1 and 3, the threaded pressing block 4 is just being provided with two and all being located the installation shell 3, two threaded pressing blocks 4 all are the arc, the equal fixedly connected with dwang 10 and gag lever post 11 of threaded pressing block 4, dwang 10 and gag lever post 11 are close to 4 curved both ends of threaded pressing block respectively and extend along the axis direction of threaded pressing block 4, the dwang 10 of two threaded pressing blocks 4 all rotates and installs in installation shell 3, two threaded pressing blocks 4 revolute when pole 10 rotates, the one end that two threaded pressing blocks 4 kept away from is respectively towards the direction rotation that is close to or keeps away from installation shell 3 axis.

Referring to fig. 3, the rotating member 5 includes a rotating ring 501 and a holding portion 502, the holding portion 502 is provided with two, the rotating ring 501 is located in the installation shell 3 and coaxially arranged with the installation shell 3, two sliding holes 12 are provided in the rotating ring 501, the sliding holes 12 extend circumferentially around the axis of the rotating ring 501, the rotating rods 10 of the two threaded press blocks 4 are respectively located in the two sliding holes 12 and are in sliding fit with the sliding holes 12, when the rotating ring 501 is rotated, the positions of the sliding holes 12 are rotated together, so that the two rotating rods 10 respectively slide in the two sliding holes 12.

With reference to fig. 4 and 5, the mounting case 3 is provided with two mounting limiting holes 13 distributed around the axis thereof, the rotating ring 501 is provided with two rotating limiting holes 14 distributed around the axis thereof and corresponding to the two mounting limiting holes 13, two ends of the limiting rod 11 of the two screw thread pressing blocks 4 in the length direction are respectively located in the mounting limiting holes 13 and the rotating limiting holes 14, when the rotating ring 501 rotates around the axis thereof, the two rotating rods 10 respectively slide in the two sliding holes 12, the limiting rods 11 of the two screw thread pressing blocks 4 move towards the axis direction close to or away from the mounting case 3 under the limiting action of the mounting limiting holes 13 and the rotating limiting holes 14, thereby facilitating the arrangement of other components between the two screw thread pressing blocks 4.

Referring to fig. 3, two grips 502 homogeneous body connect in the outer peripheral face of rotating ring 501 and lie in same water flat line setting to be convenient for the staff application of force to rotate rotating ring 501, for making the staff application of force difficult fish tail when rotating ring 501, the one end that rotating ring 501 was kept away from to two grips 502 all overlaps and is equipped with protection pad 15, and the material of protection pad 15 selects to be rubber.

With reference to fig. 3, the end of the mounting case 3 away from the first casing 1 is provided with two holding limiting grooves 16 distributed around the axis thereof, and the two holding portions 502 are respectively located in the two holding limiting grooves 16 and slidably fit with the holding limiting grooves 16, so as to limit the holding portions 502, i.e. the rotating member 5, when rotating, thereby facilitating the rotating member 5 to rotate to a desired position quickly. The apron 7 is installed in the one end of installing shell 3 and keeping away from first box 1 through two bolts to seal the opening to installing shell 3, thereby play the guard action to each part in installing shell 3. One end fixed connection of torsional spring 6 in swivel ring 501, other end fixed connection in apron 7 towards one side of installing shell 3 to play the reset action to swivel ring 501 pivoted back, be convenient for swivel ring 501 rotates to initial position.

Referring to fig. 2 and 6, the second fixing assembly includes a screw 17, a limiting sleeve 18, a return spring 19 and a limiting member 20, the second box 2 is provided with a second through hole 21 penetrating through and corresponding to the first through hole 9, and the screw 17 penetrates through the second through hole 21 and is slidably engaged with the second through hole 21. When the screw 17 extends into the space between the two threaded pressing blocks 4 through the second through hole 21, the first through hole 9 and the mounting hole 8 and is abutted against the two threaded pressing blocks 4, the screw 17 is in threaded fit with one side opposite to the two threaded pressing blocks 4 so as to realize the fixed connection between the screw 17 and the two threaded pressing blocks 4.

Referring to fig. 6 and 7, the limiting member 20 is a limiting screw threadedly coupled to the second casing 2, and one end of the limiting screw extends into the second through hole 21. The spacing groove 22 that slides that extends along its axial direction is seted up to screw rod 17, screw rod 17 keeps away from the one end of first box 1 and sets up the annular setting and with the rotation groove 23 that the spacing groove 22 is linked together that slides, stop screw all with the spacing groove 22 that slides and the cooperation of rotating groove 23, stop screw plays the limiting displacement to screw rod 17 when second through-hole 21 internal motion, thereby make screw rod 17 difficult rotation when second through-hole 21 internal motion, be favorable to guaranteeing the stability when screw rod 17 moves.

With continued reference to fig. 6 and 7, the free end of the screw 17 far away from the second box 2 is fixedly connected with a positioning rod 24 vertically arranged with the screw 17, and the position limiting sleeve 18 is provided with a positioning groove 25 corresponding to the position of the positioning rod 24 and in insertion fit with the positioning rod 24, so as to play a role in positioning the screw 17 and the position limiting sleeve 18 when being installed. The limiting sleeve 18 is in interference fit with a screw bolt 26, and when the positioning rod 24 is inserted into the positioning groove 25, the screw bolt 26 penetrates through the screw 17 along the direction perpendicular to the axis of the screw 17, so that the screw 17 and the limiting sleeve 18 are fixed.

Referring to fig. 2, the stop collar 18 is integrally connected to a handle portion 27 to facilitate the worker's application of force to rotate the stop collar 18. Outside the screw rod 17 was located to reset spring 19 cover, and reset spring 19's one end was connected in second box 2, the other end is connected in stop collar 18 to play the reset effect to screw rod 17, be convenient for screw rod 17 and remove the position when its initial commentaries on classics attitude.

Referring back to fig. 2, the first fixing component and the second fixing component are arranged between the first box body 1 and the second box body 2 in two groups, and the first box body 1 and the second box body 2 are respectively provided with a first through hole 9 and a second through hole 21 which are correspondingly arranged with the two first fixing components and the second fixing components, so as to further ensure the stability of the positions of the first box body 1 and the second box body 2 after being fixed mutually.

The implementation principle of the embodiment 1 of the application is as follows: when connecting first box 1 and second box 2, at first rotate swivel ring 501 through portion of gripping 502, thereby make two screw thread briquettings 4 revolve the direction rotation of moving pole 10 towards keeping away from each other, and then make the clearance increase between two screw thread briquettings 4, wear to locate first through-hole 9 with screw rod 17 in proper order afterwards, second through-hole 21 and mounting hole 8 and make screw rod 17 be located between two screw thread briquettings 4, loosen portion of gripping 502 afterwards, it resets under torsional spring 6's spring action to rotate 5, thereby make one side that two screw thread briquettings 4 are close to mutually and screw rod 17 looks screw-thread fit. Then the limiting sleeve 18 is rotated through the holding part 502, the screw 17 rotates along with the limiting sleeve 18, and when the limiting sleeve 18 is tightly propped against one side of the second box body 2, the first box body 1 and the second box body 2, namely the adjacent two unit box bodies, are connected. The two thread pressing blocks 4 are rotated, and the screw 17 is inserted between the two thread pressing blocks 4, so that the screw 17 can directly stretch into the position close to the position where the screw is fixed to the two unit box bodies, and the quick connection of the two unit box bodies is convenient to realize.

Example 2.

Referring to fig. 8, the difference between embodiment 2 and embodiment 1 is that the LED display screen box quick locking mechanism further includes a positioning assembly, the positioning assembly includes a mounting plate 28, a threaded rod 29, a tightening plate 30 and a clamping member 31, a longitudinal section of the mounting plate 28 is of a shape of '21274', the mounting plate 28 includes a first plate 281, a second plate 282 and a third plate 283 that are integrally connected, and the first plate 281 and the third plate 283 are arranged in parallel.

Referring to fig. 8 and 9, the clamping member 31 includes a rotating seat 311, a clamping plate 312 and a return coil spring 313, the rotating seat 311 is rotatably connected to the first plate 281, the clamping plate 312 is hingedly mounted on the rotating seat 311, the return coil spring 313 is mounted between the clamping plate 312 and the rotating seat 311, so that the clamping plate 312 rotates toward the direction of the first plate 281 under the elastic force of the return coil spring 313, thereby clamping and fixing the components located between the first plate 281 and the clamping plate 312, and the rotation fit between the rotating seat 311 and the first plate 281 enables the abutting plate 30 to rotate to a state with a large placing gap between the abutting plate 281 and the first plate 281, thereby facilitating the components to be fixed, i.e., the unit box, to be placed at the position where the unit box is fixed with the mounting plate 28, and having strong applicability.

With continued reference to fig. 8 and 9, the threaded rod 29 is threadedly coupled to the third plate 283, and a hand wheel 32 is fixedly coupled to an end of the threaded rod 29 away from the third plate 283 to facilitate rotation of the threaded rod 29 by a worker. The tightening plate 30 is fixedly connected to one end of the threaded rod 29 facing the first plate 281, and when the threaded rod 17 rotates, the tightening plate 30 can move towards a direction close to or away from the first plate 281, so that the threaded rod 29 can further tighten and fix the components fixed by the tightening plate 30 and the first plate 281.

The implementation principle of embodiment 2 of the present application is as follows: pressing the side of the clamping plate 312 away from the first plate 281 moves the clamping plate 312 in a direction away from the first plate 281, and then placing one of the unit cases in the gap between the clamping plate 312 and the first plate 281 while making the unit case contact with the second plate 282, and after releasing the clamping plate 312, the unit case is fixed with the mounting plate 28 under the limiting action of the clamping plate 312 and the first plate 281.

After that, arrange another unit box in the clearance between fixed unit box and third plate body 283 and inconsistent with second plate body 282, rethread hand wheel 32 revolves to twist threaded rod 29 and makes and support tight board 30 and support tight another unit box, thereby realize the preliminary location to position between two unit boxes, and be favorable to guaranteeing its two unit boxes of two unit box stable fixed back smoothness that is close to one side mutually, simultaneously, locating component can take off from two unit boxes after two unit boxes are stable fixed, thereby make locating component can carry out used repeatedly.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: equivalent changes in structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a quick locking mechanism of LED display screen box which characterized in that: the device comprises a first fixing assembly and a second fixing assembly which are respectively arranged on two unit box bodies, wherein the first fixing assembly comprises an installation shell (3), two threaded pressing blocks (4) and a rotating piece (5), the installation shell (3) is arranged on one unit box body, an installation hole (8) which penetrates through the installation shell (3) is formed in the installation shell, the number of the threaded pressing blocks (4) is two, the two threaded pressing blocks (4) are both rotatably arranged in the installation shell (3), and the rotating piece (5) is used for driving the two threaded pressing blocks (4) to rotate towards the direction away from each other;

the second fixing component comprises a screw rod (17) and a limiting sleeve (18), the limiting sleeve (18) is installed at one end of the screw rod (17), the limiting sleeve (18) abuts against the other unit box body, the screw rod (17) penetrates through the two unit box bodies and extends into the space between the two threaded pressing blocks (4) through the installation hole (8) to be abutted against the two threaded pressing blocks (4), and when the screw rod (17) is in threaded fit with one side opposite to the two threaded pressing blocks (4);

the thread pressing block (4) is fixedly connected with a rotating rod (10) and a limiting rod (11), the rotating rod (10) is rotatably installed on an installation shell (3), an installation limiting hole (13) for the limiting rod (11) to rotate is formed in the installation shell (3), the rotating piece (5) comprises a rotating ring (501) and a holding portion (502), the rotating ring (501) and the installation shell (3) are coaxially arranged and rotatably connected with the installation shell (3), the rotating ring (501) is provided with a rotating limiting hole (14) for the limiting rod (11) to rotate and a sliding hole (12) for the rotating rod (10) to slide, and the holding portion (502) is fixedly connected to the outer peripheral face of the rotating ring (501);

the second fixing component further comprises a limiting part (20) installed on the other unit box body, a sliding limiting groove (22) extending along the axial direction of the screw rod (17) is formed in the screw rod (17), a free end, close to the limiting sleeve (18), of the screw rod (17) is provided with a rotating groove (23) which is annularly arranged and communicated with the sliding limiting groove (22), and the limiting part (20) is matched with the sliding limiting groove (22) and the rotating groove (23) in a sliding mode.

2. The quick locking mechanism of the LED display screen box body according to claim 1, characterized in that: the two holding parts (502) are arranged, the two holding parts (502) are located on the same horizontal line, the mounting shell (3) is provided with two holding limiting grooves (16), and the two holding parts (502) are respectively located in the two holding limiting grooves (16) and are in sliding fit with the holding limiting grooves (16).

3. The quick locking mechanism of LED display screen box of claim 1, characterized in that: the first fixing component further comprises a torsion spring (6), and the torsion spring (6) is used for resetting the rotating piece (5).

4. The quick locking mechanism of LED display screen box of claim 3, characterized in that: apron (7) are installed at the top of installation shell (3), screw thread briquetting (4), rotate piece (5) and torsional spring (6) all are located between installation shell (3) and apron (7), the one end of torsional spring (6) is connected in rotating piece (5), the other end is connected in apron (7).

5. The quick locking mechanism of the LED display screen box body according to claim 1, characterized in that: the second fixing assembly further comprises a return spring (19), and the return spring (19) is arranged between the limiting sleeve (18) and the other unit box body.

6. The quick locking mechanism of the LED display screen box body according to claim 1, characterized in that: the screw rod (17) is fixedly connected with a positioning rod (24), the limiting sleeve (18) is provided with a positioning groove (25) which corresponds to the positioning rod (24) in position and is matched with the positioning rod (24) in an inserting mode, and the limiting sleeve (18) is connected with a handle portion (27).

7. The quick locking mechanism of the LED display screen box body according to claim 1, characterized in that: still include locating component, locating component includes mounting panel (28), threaded rod (29), supports tight board (30) and holder (31), holder (31) are used for making mounting panel (28) centre gripping be fixed in one of them unit box, threaded rod (29) threaded connection in mounting panel (28), support tight board (30) fixed connection in the one end of threaded rod (29), two unit box concatenations mounting panel (28) when being fixed in one of them unit box through holder (31), two unit boxes all contradict in one side of mounting panel (28), just support tight board (30) towards one side that holder (31) were kept away from to another unit box.

8. The quick locking mechanism of the LED display screen box body according to claim 7, characterized in that: the clamping piece (31) comprises a rotating seat (311), a clamping plate (312) and a reset coil spring (313), the rotating seat (311) is rotatably connected to the mounting plate (28), the clamping plate (312) is hinged to the rotating seat (311), and the reset coil spring (313) is used for enabling the clamping plate (312) to rotate towards the direction of abutting against the mounting plate (28).