CN110322797B

CN110322797B - Security display device and control method thereof

Info

Publication number: CN110322797B
Application number: CN201910637173.7A
Authority: CN
Inventors: 贺志强; 谢瑾
Original assignee: Shenzhen Hongtiansheng Information Technology Co ltd
Current assignee: Shenzhen Hongtiansheng Information Technology Co ltd
Priority date: 2019-07-15
Filing date: 2019-07-15
Publication date: 2020-07-10
Anticipated expiration: 2039-07-15
Also published as: CN110322797A

Abstract

The invention discloses a security display device and a control method thereof, and the security display device comprises a plurality of display screens, a back plate frame, three cross rods and a driving device, wherein the three cross rods are arranged on the back plate frame in a vertically sliding manner, the three cross rods are defined as a first cross rod, a second cross rod and a third cross rod which are distributed from top to bottom, the back surfaces of all the display screens are respectively detachably connected with the first cross rod, the second cross rod or the third cross rod, the driving device is used for driving the first cross rod, the second cross rod and the third cross rod to slide upwards at different speeds, the speed of the first cross rod is greater than that of the second cross rod, and the speed of the second cross rod is greater than that of the third cross rod; the advantage is the dismouting display screen of being convenient for, simple high efficiency.

Description

Security display device and control method thereof

Technical Field

The invention belongs to the technical field of security monitoring equipment, and particularly relates to a security display device and a control method thereof.

Background

The security monitoring device is an independent and complete system formed by transmitting video signals in a closed loop by using optical fibers, coaxial cables or microwaves, displaying and recording images, reflecting a monitored object in real time, vividly and truly, replacing manpower to monitor for a long time in a severe environment, and recording the monitoring result by using a video recorder, and the security monitoring device is widely applied to places such as markets, office buildings, factories, hospitals and the like.

Generally, the security monitoring device comprises a plurality of display screens used for displaying a camera monitoring picture and an installation back plate used for fixing all the display screens, all the display screens are arranged in a matrix shape and installed on the installation back plate in order to reduce the occupied area of the display screens, and adjacent display screens are spliced together in a seamless mode. When the display screen that is located the intermediate position damages and needs to dismantle, the staff need be with the backplate of this display screen dismantlement from the installation backplate earlier, because upside, downside, left side and the right side of this display screen all do not have the impetus, the staff can only hold up the front of this display screen with hand and take off it, but if the size and the weight of display screen are all great, the front crushing of display screen is very easily done all with to hand, causes bigger damage.

The infrared camera is the biggest consumption from the infrared lamp, and not few monitoring equipment manufacturers are for pursuing night vision effect, intentionally increase the power of the infrared lamp, so as to meet the requirement of night video monitoring, and it is known that the power of L ED lamp converted from electric energy into light energy only needs 25% at most, and can only be suitable for the contrary for increasing the working current of the L ED lamp in a short time at intervals with farther irradiation, and the other 75% of electric energy is converted into heat energy, so that the heat is increased, if the heat is not discharged for a long time, the infrared lamp can be damaged, and the long-term use of CCD of the camera can also be influenced.

Disclosure of Invention

The invention aims to solve the technical problem of providing a security protection display device with a display screen convenient to disassemble and assemble, which is simple and efficient.

The technical scheme adopted by the invention for solving the technical problems is as follows: the utility model provides a security protection display device, includes a plurality of display screens, still includes backplate frame, gliding setting from top to bottom three horizontal pole and drive arrangement on the backplate frame, define three horizontal pole for from the top down distributed first horizontal pole, second horizontal pole and third horizontal pole, all the back of display screen respectively with first horizontal pole the second horizontal pole or the connection can be dismantled to the third horizontal pole, drive arrangement is used for ordering about first horizontal pole the second horizontal pole with the third horizontal pole is with different speed upsliding, just the speed of first horizontal pole is greater than the speed of second horizontal pole, the speed of second horizontal pole is greater than the speed of third horizontal pole.

Preferably, a heat dissipation assembly capable of extending up and down is arranged between the two vertically adjacent display screens. The heat dissipation assembly comprises two slide rails and a flexible heat dissipation net fixedly arranged between the two slide rails, and a transverse sliding groove matched with the slide rails is formed in the display screen.

Preferably, the driving device comprises a rotating motor with a rotating shaft, a fixed pulley fixedly arranged at the top end of the back plate frame, a first connecting rope, a second connecting rope and a third connecting rope, wherein the fixed pulley is provided with a first chute, a second chute and a third chute, the rotating shaft is fixedly provided with a first disc, a second disc and a third disc, the diameters of the first disc, the second disc and the third disc are sequentially reduced, one end of the first connecting rope is fixedly connected with the outer side wall of the first disc, and the other end of the first connecting rope passes through the first chute and is detachably connected with the first cross rod; one end of the second connecting rope is fixedly connected with the outer side wall of the second disc, and the other end of the second connecting rope passes through the second chute and is detachably connected with the second cross rod; one end of the third connecting rope is fixedly connected with the outer side wall of the third round disc, and the other end of the third connecting rope passes through the third sliding groove and then is detachably connected with the third cross rod.

Preferably, a first hook is fixedly arranged at the other end of the first connecting rope, and a first annular buckle matched with the first hook is fixedly arranged on the first cross rod; a second hook is fixedly arranged at the other end of the second connecting rope, and a second annular buckle matched with the second hook is fixedly arranged on the second cross rod; the other end of the third connecting rope is fixedly provided with a third hook, and a third annular buckle matched with the third hook is fixedly arranged on the third cross rod.

Preferably, the backboard frame comprises two vertical rods and an upper cross beam, the two vertical rods are vertically arranged, the upper cross beam is transversely arranged, the two ends of the upper cross beam are respectively fixedly connected with the upper ends of the two vertical rods and provided with vertical sliding grooves, the two ends of the first cross beam are respectively provided with a first sliding block in sliding fit with the vertical sliding grooves, the two ends of the second cross beam are respectively provided with a second sliding block in sliding fit with the vertical sliding grooves, and the two ends of the third cross beam are respectively provided with a third sliding block in sliding fit with the vertical sliding grooves.

Preferably, the bottom of the back plate frame is fixedly provided with a base, and the bottom surface of the base is provided with universal wheels and adjustable feet.

Preferably, the first cross bar, the second cross bar and the third cross bar are respectively provided with a plurality of annular sliding blocks used for detachably connecting the back of the display screen, the annular sliding blocks are provided with fastening screw holes and fastening bolts, and the fastening bolts are in threaded connection with the fastening screw holes and abut against the first cross bar, the second cross bar or the third cross bar.

Preferably, the upper end face of the annular sliding block is downwards sunken to form a clamping groove, and a clamping block matched with the clamping groove is arranged on the back face of the display screen.

Preferably, the annular slider is provided with a first screw hole and a connecting bolt which are communicated with the side wall of the clamping groove, the clamping block is provided with a second screw hole communicated with the first screw hole, and the connecting bolt is sequentially in threaded connection with the first screw hole and the second screw hole.

Preferably, the security display device and the video data come from an infrared camera, the infrared camera comprises a camera, a fixed shell, a movable shell and a flexible heat dissipation grid, the camera is installed on the fixed shell, the movable shell is connected with the movable shell through the flexible heat dissipation grid, and the flexible heat dissipation grid is unfolded or folded through a transmission structure and a power device.

Preferably, the power device is a motor, the motor is installed in the fixed shell, the output end of the motor is connected with the screw rod, the screw rod drives the movable bearing to axially move along the screw rod, the inner ring of the movable bearing is connected with the screw rod through threads, the outer ring of the movable bearing is connected with the movable shell, and the movable shell drives the flexible heat dissipation grid to be unfolded or folded in the moving process.

A control method of a security display device comprises the following steps: when the temperature exceeds a set temperature value, starting the rotating motor, so that the heat dissipation assembly between the two adjacent display screens of the upper layer and the lower layer is unfolded to increase the heat dissipation area; or, when the infrared camera stably exceeds a set temperature value, the motor is started, so that the flexible heat dissipation grid is unfolded, and outdoor air passes through the flexible heat dissipation grid and enters the fixed shell to cool the infrared camera.

Compared with the prior art, the invention has the advantages that:

1. the first cross rod, the second cross rod and the third cross rod are driven to slide upwards at different speeds through the driving device, and the display screen on the corresponding first cross rod, the display screen on the second cross rod and the display screen on the third cross rod move upwards at different speeds, so that a gap is formed between the display screen on the first cross rod, the display screen on the second cross rod and the display screen on the third cross rod, a worker can conveniently stretch into the gap and then hold the gap at the upper side or the lower side of the display screen, the front of the display screen does not need to be directly contacted, the display screen at the middle position is convenient to disassemble, and the device is simple and efficient;

2. first couple is detained the cooperation with first annular and is used, the second couple is detained the cooperation with the second annular and is used and the third couple is detained the cooperation with the third annular and is used, when not installing or dismantling the display screen, can take off and accomodate all connection ropes, rotation motor, reduces security protection display device's area.

3. By arranging the universal wheels and the adjustable feet, when the security display device needs to move, the height of the adjustable feet is adjusted to be smaller than that of the universal wheels, namely the universal wheels are in contact with the ground; when the security display device needs to be fixed, the height of the adjustable foot is adjusted to be larger than that of the universal wheel, and then the adjustable foot is abutted to the ground;

4. by arranging the annular sliding block, the annular sliding block can slide along the axial direction of the cross rod to adjust the gap between two horizontally adjacent display screens, so that a worker can conveniently hold the left side or the right side of the display screens after stretching into the gap, the horizontal position of the display screens can be adjusted, and the flexibility is higher;

5. the radiating function that radiator unit can strengthen the display screen, when the display screen operating duration is more of a specified duration and when heaing up, the heat can be through radiator unit fast diffusion, makes the display screen be in comparatively suitable operational environment, is favorable to using for a long time.

6. The expanded flexible heat dissipation grid can increase the heat dissipation area, and meanwhile, the shell is opened, so that heat sources in the passenger can directly exchange heat with cold air outside the shell, and the cooling efficiency is improved.

Drawings

FIG. 1 is a first schematic structural diagram of the present invention;

FIG. 2 is an enlarged schematic view at A in FIG. 1;

FIG. 3 is an enlarged schematic view at B of FIG. 1;

FIG. 4 is an enlarged schematic view at C of FIG. 1;

FIG. 5 is an enlarged schematic view at D of FIG. 1;

FIG. 6 is a second schematic structural view of the present invention;

FIG. 7 is a first schematic diagram of a partial explosion according to the present invention;

FIG. 8 is a second schematic illustration of a partial explosion of the present invention;

FIG. 9 is a partial schematic view of the present invention;

FIG. 10 is an enlarged schematic view at E of FIG. 9;

FIG. 11 is a schematic view of a partial structure of a display screen when folded;

FIG. 12 is a schematic view of a partial structure of the display screen when separated;

fig. 13 is a schematic structural diagram of a monitoring camera device according to the present invention;

FIG. 14 is a schematic view of a heat sink assembly of the surveillance camera device of the present invention;

fig. 15 is a schematic view of a driving structure of the heat dissipation assembly in fig. 14.

In the figure: 1. a display screen; 11. a clamping block; 111. a second screw hole; 12. a transverse chute; 2. a back plate frame; 21. a vertical rod; 211. a vertical chute; 22. an upper cross beam; 23. a base; 24. a universal wheel; 25. an adjustable foot; 31. a first cross bar; 311. a first annular buckle; 312. a first slider; 32. a second cross bar; 321. a second annular buckle; 322. a second slider; 33. a third cross bar; 331. a third annular buckle; 332. a third slider; 34. an annular slider; 341. fastening screw holes; 342. fastening a bolt; 343. a card slot; 344. a first screw hole; 345. a connecting bolt; 4. a drive device; 41. rotating the motor; 411. a rotating shaft; 412. a first disc; 413. a second disc; 414. a third disc; 42. a fixed pulley; 421. a first chute; 422. a second chute; 423. a third chute; 43. a first connecting rope; 431. a first hook; 44. a second connecting rope; 441. a second hook; 45. a third connecting rope; 451. a third hook; 5. a heat dissipating component; 51. a slide rail; 52. a flexible heat-dissipating mesh; 61. a camera; 62. a stationary housing; 63. moving the housing; 64. a flexible heat dissipation grid is stretched; 65. a motor; 66. a screw; 67. moving the bearing; 671. an outer ring; 672. and an inner ring.

Detailed Description

The invention is described in further detail below with reference to the accompanying examples.

The first embodiment is as follows: as shown in the figure, the security display device comprises a plurality of display screens 1, a back panel frame 2, three cross rods and a driving device 4, wherein the three cross rods are arranged on the back panel frame 2 and can slide up and down, the three cross rods are defined as a first cross rod 31, a second cross rod 32 and a third cross rod 33 which are distributed from top to bottom, the back surfaces of all the display screens 1 are detachably connected with the first cross rod 31, the second cross rod 32 or the third cross rod 33 respectively, the driving device 4 is used for driving the first cross rod 31, the second cross rod 32 and the third cross rod 33 to slide upwards at different speeds, the speed of the first cross rod 31 is greater than that of the second cross rod 32, and the speed of the second cross rod 32 is greater than that of the third cross rod 33.

In this embodiment, the number of the display screens 1 is nine, and the display screens 1 are arranged in a matrix of 3 × 3, although the number of the display screens 1 may be more, the number of the cross bars is not limited to three, and the specific number of the cross bars is equal to the number of rows of the display screens 1.

Example two: the rest of the embodiment is the same as the first embodiment, and the difference is that the driving device 4 includes a rotating motor 41 having a rotating shaft 411, a fixed pulley 42 fixedly disposed at the top end of the back panel frame 2, a first connecting rope 43, a second connecting rope 44 and a third connecting rope 45, the fixed pulley 42 is provided with a first chute 421, a second chute 422 and a third chute 423, the rotating shaft 411 is fixedly provided with a first disc 412, a second disc 413 and a third disc 414, which have successively reduced diameters, one end of the first connecting rope 43 is fixedly connected with the outer side wall of the first disc 412, and the other end of the first connecting rope 43 passes through the first chute 421 and then is detachably connected with the first cross bar 31; one end of the second connecting rope 44 is fixedly connected with the outer side wall of the second disc 413, and the other end of the second connecting rope 44 is detachably connected with the second cross bar 32 after passing through the second chute 422; one end of the third connecting rope 45 is fixedly connected with the outer side wall of the third disc 414, and the other end of the third connecting rope 45 is detachably connected with the third cross bar 33 through the third sliding groove 423.

Wherein, two driving devices 4 are arranged, the two driving devices 4 are symmetrically arranged at two sides of the back plate frame 2, the rotating motor 41 is detachably arranged on the ground at the edge of the back plate frame 2, and of course, the rotating motor 41 can also be detachably arranged on the back plate frame 2.

In order to facilitate storage, a first hook 431 is fixedly arranged at the other end of the first connecting rope 43, and a first annular buckle 311 matched with the first hook 431 is fixedly arranged on the first cross rod 31; a second hook 441 is fixedly arranged at the other end of the second connecting rope 44, and a second annular buckle 321 matched with the second hook 441 is fixedly arranged on the second cross bar 32; the other end of the third connecting rope 45 is fixedly provided with a third hook 451, the third cross rod 33 is fixedly provided with a third annular buckle 331 matched with the third hook 451, and when the display screen 1 is not installed or disassembled, all the connecting ropes and the rotating motor 41 can be taken down and stored, so that the floor area of the security display device is reduced.

Example three: the rest of the structure is the same as the first embodiment, and the difference is that the back plate frame 2 includes two vertical rods 21 vertically arranged and an upper beam 22 horizontally arranged, two ends of the upper beam 22 are respectively fixedly connected with the upper ends of the two vertical rods 21, two vertical rods 21 are provided with vertical sliding grooves 211, two ends of the first cross rod 31 are respectively provided with first sliding blocks 312 in sliding fit with the vertical sliding grooves 211, two ends of the second cross rod 32 are respectively provided with second sliding blocks 322 in sliding fit with the vertical sliding grooves 211, and two ends of the third cross rod 33 are respectively provided with third sliding blocks 332 in sliding fit with the vertical sliding grooves 211.

Further, the bottom of the vertical rod 21 is fixedly provided with a base 23, and the bottom surface of the base 23 is provided with four universal wheels 24 and four adjustable legs 25.

Example four: the rest of the embodiment is the same as the first embodiment, and the difference is that a plurality of annular sliders 34 for detachably connecting the back surfaces of the display screens 1 are respectively arranged on the first cross bar 31, the second cross bar 32 and the third cross bar 33, fastening screw holes 341 and fastening bolts 342 are arranged on the annular sliders 34, and the fastening bolts 342 are screwed with the fastening screw holes 341 and abut on the first cross bar 31, the second cross bar 32 or the third cross bar 33.

Further, the upper end surface of the annular slider 34 is recessed downwards to form a clamping groove 343, a clamping block 11 matched with the clamping groove 343 is arranged on the back surface of the display screen 1, and the clamping block 11 is arranged in an L shape in the embodiment.

Further, the annular slider 34 is provided with a first screw hole 344 communicating with a side wall of the engaging groove 343 and a connecting bolt 345, the engaging block 11 is provided with a second screw hole 111 communicating with the first screw hole 344, and the connecting bolt 345 is screwed with the first screw hole 344 and the second screw hole 111 in sequence.

Example five: the rest of the display panel is the same as the first embodiment, but the difference is that a heat dissipation assembly 5 which can extend up and down is arranged between two display panels 1 which are adjacent up and down.

In this embodiment, the heat dissipation assembly 5 includes two slide rails 51 and a flexible heat dissipation net 52 fixedly disposed between the two slide rails 51, and the display screen 1 is provided with a transverse sliding slot 12 engaged with the slide rails 51. Wherein the slide rail 51 is made of a heat dissipating material.

As shown in fig. 13-15, the security display device and the video data come from an infrared camera, the infrared camera includes a camera 61, a fixed housing 62, a movable housing 63 and a flexible heat dissipation grid 64, the camera 61 is installed in the fixed housing 62, the movable housing 63 is connected with the movable housing 63 through the flexible heat dissipation grid 64, and the flexible heat dissipation grid 64 is unfolded or folded through a transmission structure and a power device.

The power device is a motor 65, the motor 65 is installed in the fixed housing 62, the output end of the motor 65 is connected with a screw 66, the screw 66 drives a moving bearing 67 to move axially along the screw 66, an inner ring 671 of the moving bearing 67 is connected with the screw 66 through threads, an outer ring 672 of the moving bearing 67 is connected with the moving housing 63, and the moving housing 63 drives the telescopic flexible heat dissipation grid 64 to expand or retract in the moving process. The flexible heat dissipation grid 64 after expansion can increase the heat dissipation area, and simultaneously the shell is opened, so that the heat source in the passenger body can directly exchange heat with the cold air outside the shell, and the cooling efficiency is improved.

There is sufficient space in the traveling housing 63 to allow the threaded rod 66 to have sufficient length located therein to ensure that the telescoping flexible heat-dissipating grid 64 is deployed.

The flexible heat dissipation grid 64 is formed by combining a plurality of wavy heat dissipation fins, and the wave crests and the wave troughs between two adjacent heat dissipation fins are connected to form a plurality of continuous quadrilateral mesh structures.

In order to avoid flying insects entering the fixed shell 62 and the movable shell 63 and causing short circuit of the device, the telescopic flexible heat dissipation grid 64 is electrified to form an electric mosquito swatter, and flying insects are prevented from entering the fixed shell 62 and the movable shell 63.

When the temperature sensor measures that the infrared camera stably exceeds a set temperature value, the motor is started, the flexible heat dissipation grid is unfolded, and outdoor air passes through the flexible heat dissipation grid and enters the fixed shell to cool the infrared camera.

The above are only typical examples of the present invention, and besides, the present invention may have other embodiments, and all the technical solutions formed by equivalent substitutions or equivalent changes are within the scope of the present invention as claimed.

Claims

1. The utility model provides a security protection display device, includes a plurality of display screens (1), and its characterized in that still includes backplate frame (2), gliding setting from top to bottom is in three horizontal pole and drive arrangement (4) on backplate frame (2), all the back of display screen (1) can be dismantled with first horizontal pole (31), second horizontal pole (32) or third horizontal pole (33) and be connected, drive arrangement (4) are used for ordering about first horizontal pole (31), second horizontal pole (32) with third horizontal pole (33) upwards slide with different speeds, just the speed of first horizontal pole (31) is greater than the speed of second horizontal pole (32), the speed of second horizontal pole (32) is greater than the speed of third horizontal pole (33).

2. The security display device of claim 1, wherein: two adjacent from top to bottom be provided with radiator unit (5) that can extend from top to bottom between display screen (1), radiator unit (5) include two slide rails (51) and fixed the setting two flexible radiator-grid (52) between slide rail (51), be provided with on display screen (1) with slide rail (51) complex horizontal spout (12).

3. The security display device of claim 2, wherein: the driving device (4) comprises a rotating motor (41) with a rotating shaft (411), a fixed pulley (42) fixedly arranged at the top end of the back plate frame (2), a first connecting rope (43), a second connecting rope (44) and a third connecting rope (45), wherein the fixed pulley (42) is provided with a first sliding groove (421), a second sliding groove (422) and a third sliding groove (423), the rotating shaft (411) is fixedly provided with a first disc (412), a second disc (413) and a third disc (414) which are sequentially reduced in diameter, one end of the first connecting rope (43) is fixedly connected with the outer side wall of the first disc (412), and the other end of the first connecting rope (43) is detachably connected with the first cross rod (31) after passing through the first sliding groove (421); one end of the second connecting rope (44) is fixedly connected with the outer side wall of the second disc (413), and the other end of the second connecting rope (44) is detachably connected with the second cross rod (32) after passing through the second chute (422); one end of the third connecting rope (45) is fixedly connected with the outer side wall of the third disc (414), and the other end of the third connecting rope (45) passes through the third sliding groove (423) and then is detachably connected with the third cross rod (33).

4. The security display device of claim 3, wherein: a first hook (431) is fixedly arranged at the other end of the first connecting rope (43), and a first annular buckle (311) matched with the first hook (431) is fixedly arranged on the first cross rod (31);

a second hook (441) is fixedly arranged at the other end of the second connecting rope (44), and a second annular buckle (321) matched with the second hook (441) is fixedly arranged on the second cross bar (32);

the other end of the third connecting rope (45) is fixedly provided with a third hook (451), and a third annular buckle (331) matched with the third hook (451) is fixedly arranged on the third cross rod (33).

5. The security display device of claim 1, wherein: backplate frame (2) are including two montants (21) of vertical setting and the entablature (22) of horizontal setting, the both ends of entablature (22) respectively with two the upper end fixed connection of montant (21), two be provided with vertical spout (211) on montant (21), the both ends of first horizontal pole (31) be provided with respectively with vertical spout (211) sliding fit's first slider (312), the both ends of second horizontal pole (32) be provided with respectively with vertical spout (211) sliding fit's second slider (322), the both ends of third horizontal pole (33) be provided with respectively with vertical spout (211) sliding fit's third slider (332).

6. The security display device of claim 1, wherein: the display screen is characterized in that the first cross bar (31), the second cross bar (32) and the third cross bar (33) are respectively provided with a plurality of annular sliding blocks (34) which are used for detachably connecting the back surface of the display screen (1), the annular sliding blocks (34) are provided with fastening screw holes (341) and fastening bolts (342), and the fastening bolts (342) are in threaded connection with the fastening screw holes (341) and abut against the first cross bar (31), the second cross bar (32) or the third cross bar (33).

7. The security display device of claim 6, wherein: the upper end surface of the annular sliding block (34) is downwards recessed to form a clamping groove (343), and a clamping block (11) matched with the clamping groove (343) is arranged on the back surface of the display screen (1); the annular sliding block (34) is provided with a first screw hole (344) communicated with the side wall of the clamping groove (343) and a connecting bolt (345), the clamping block (11) is provided with a second screw hole (111) communicated with the first screw hole (344), and the connecting bolt (345) is sequentially in threaded connection with the first screw hole (344) and the second screw hole (111).

8. The security display device according to any one of claims 1-7, wherein: security protection display device comes from infrared camera with video data, infrared camera includes camera (61), fixed casing (62), removes casing (63) and flexible heat dissipation net (64), camera (61) are installed fixed casing (62), remove casing (63) with remove between casing (63) through flexible heat dissipation net (64) connect, flexible heat dissipation net (64) are realized expanding or are packed up through a drive structure and power device.

9. The security display device of claim 8, wherein: the power device is motor (65), motor (65) are installed in fixed casing (62), the output and screw rod (66) of motor (65) are connected, screw rod (66) order about removal bearing (67) along screw rod (66) axial displacement, the inner circle (671) of removal bearing (67) pass through the screw thread with screw rod (66) are connected, outer lane (672) of removal bearing (67) with removal casing (63) are connected, removal casing (63) remove the in-process and drive flexible heat dissipation net (64) expand or pack up.

10. A control method of the security display device according to any one of claims 1 to 9, comprising the steps of: when the temperature exceeds a set temperature value, starting the rotating motor (41) to expand the heat dissipation assembly (5) between two adjacent display screens (1) of the upper layer and the lower layer to increase the heat dissipation area;

or when the infrared camera stably exceeds a set temperature value, starting the motor (65) to expand the flexible heat dissipation grid (64), and cooling the infrared camera by outdoor air entering the fixed shell (62) through the flexible heat dissipation grid (64).