Mining voice broadcast multi-surface display device

Abstract

The utility model relates to a mining voice broadcast multi-surface display device, and belongs to the technical field of multi-surface display devices. Comprising a center base, four display screen bodies and a telescopic support, the four display screen bodies face different directions and are arranged around the periphery of the center base, a controller and a voice broadcast device are fixedly installed in the center base, and the voice broadcast device and the display screen bodies are electrically connected with the controller; supporting beams are vertically arranged on the periphery of the outer side of the center base in a sliding mode, and height adjusting pieces used for adjusting the heights of the supporting beams at the corresponding positions are arranged in the middle positions of the periphery of the outer side of the center base. By arranging the height adjusting piece, an operator can adjust the heights of the supporting beams and the display screen bodies according to the actual roadway trend and the observation view angle where the four display screen bodies face. And secondly, an operator can respectively adjust the inclination angle of each group of display screen bodies, so that the information transmission blind area generated by the traditional fixed display screen due to angle or height limitation is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to multi -face display device technical field especially relates to a mine voice broadcast multi -face display device. BACKGROUND

[0002] The mine voice broadcast multi -face display device is a safety warning equipment applied to the complex environment of mine roadway, and is usually installed at the position of roadway intersection, inclined road or main transportation roadway, etc.

[0003] Through the search, the utility model discloses a kind of mine voice broadcast multi -face display devices of patent no. CN221884639U, including: machine body;Display screen;The two sides of the machine body are respectively connected with two display screens by hinge, each display screen includes at least two sub-display screens, and the sub-display screens are electrically connected between each other;Voice broadcaster;The voice broadcaster is installed on the machine body;Information issuing unit;The information issuing unit is arranged in the machine body, and the display screen, the voice broadcaster are electrically connected with the information issuing unit.The utility model adopts voice broadcast and multi -face screen display integrated design, can be flexibly applied to each position in mine, and it is convenient to overhaul, improve use efficiency.

[0004] The mine voice broadcast multi -face display device disclosed in the above-mentioned utility model patent, although realizes the functions of multi -face display and voice broadcast, but the display screens located on both sides of the machine body are in a fixed state of relative parallelism and consistent height, and the display screens on both sides cannot be independently adjusted according to the actual roadway direction and observation angle. This leads to the fact that the display contents on both sides cannot be effectively recognized by the vehicles or staff in the direction, thus generating an information transmission blind area and increasing the safety hazards of underground operation. UTILITY MODEL CONTENTS

[0005] To solve the above technical problems, the utility model provides a mine voice broadcast multi -face display device.

[0006] The technical scheme of the utility model is as follows:

[0007] The utility model provides a kind of mining voice broadcast multi-face display device, including center pedestal, four groups of display screen body and telescopic support, four groups of the display screen body are respectively towards different directions and are around the center pedestal side setting, controller and voice broadcaster are fixedly installed in the inside of the center pedestal, the voice broadcaster, display screen body are electrically connected with controller, support beam is vertically slid in the outside four quarters of the center pedestal, height adjusting piece for adjusting the height of corresponding position support beam is equipped in the outside four quarters of the center pedestal middle position, the display screen body is hinged in the side of support beam away from the center pedestal, the both ends of support beam and display screen body are hinged and are equipped with the inclination limit piece for fixing the pitch angle of display screen body, the upper and lower surfaces of the center pedestal are fixedly connected with the base plate for installing telescopic support, and the telescopic support and base plate are detachably connected.

[0008] Optionally, the center pedestal includes a square frame, a bottom plate, and a top beam plate. The bottom plate is fixedly connected to the lower surface of the square frame. The lower base plate is fixedly connected to the middle position of the lower surface of the bottom plate. The top beam plate is fixedly connected to the middle position of the upper surface of the square frame. The upper base plate is fixedly connected to the upper surface of the top beam plate. The front and rear sides of the top beam plate are hinged with cover plates. The surface of the bottom plate is provided with a loudspeaker hole. The voice broadcaster is installed above the loudspeaker hole through a support.

[0009] Optionally, two groups of slide rails are fixedly connected to the outside four quarters of the square frame. The two ends of the side of the support beam close to the square frame are fixedly connected with slide blocks. The slide blocks are slidably connected inside the corresponding position slide rails.

[0010] Optionally, the height adjusting piece includes a C-shaped plate and a threaded adjusting rod. The C-shaped plate is fixedly connected to the middle position of the outer side wall of the square frame. The lower end of the threaded adjusting rod is rotatably connected to the lower short edge of the C-shaped plate. The upper end of the threaded adjusting rod is rotatably penetrated through the upper short edge of the C-shaped plate and extends above the C-shaped plate. The middle position of the side of the support beam close to the center pedestal is fixedly connected with a moving seat. The moving seat is threadedly sleeved outside the threaded adjusting rod.

[0011] Optionally, the both ends of the support beam are fixedly connected with limit discs. The center position of the side of the limit disc away from the support beam is fixedly connected with a shaft rod. The side of the display screen body close to the center pedestal is fixedly connected with a fixing frame. The both ends of the side of the fixing frame away from the display screen body are fixedly connected with ear plates. The ear plates are rotatably connected outside the shaft rod of the corresponding side.

[0012] Optionally, the surface of the limiting disc is uniformly provided with a limiting hole along the semicircular direction, the surface of the ear plate is provided with two groups of movable holes, the inclination limiting piece comprises a fixed seat, the fixed seat is fixedly connected to the side of the ear plate away from the limiting disc, the side of the fixed seat close to the ear plate is in an open state, the inside of the fixed seat is slidably connected with a movable plate, the side of the fixed seat away from the opening is abutted with two groups of springs between the fixed seat and the movable plate, a threaded hole is provided through the center of the side of the fixed seat away from the opening, the inside of the threaded hole is screwedly connected with a fixing bolt for limiting the movement of the movable plate, the side of the movable plate away from the spring is fixedly connected with two groups of limiting pins, the two groups of limiting pins are slidably connected in the two groups of movable holes respectively, and the hemispherical head of the limiting pin is elastically abutted in the limiting hole at the corresponding position under the action of the spring.

[0013] Optionally, the telescopic support comprises a fixed plate, two groups of inner columns and two groups of outer hollow columns, the fixed plate is detachably installed on the side of the base plate away from the center base, the two groups of inner columns are fixedly connected to the side of the fixed plate away from the base plate, the outer hollow columns are slidably sleeved on the outer sides of the corresponding inner columns and are relatively fixed through the fixing pieces, and the two groups of outer hollow columns are commonly fixed with a mounting plate at the ends away from the fixed plate.

[0014] Optionally, a plurality of groups of vertically equidistantly arranged connecting holes are provided through the front and rear sidewalls of the inner column, a fixing hole is provided through the front and rear sidewalls of the end of the outer hollow column away from the mounting plate, the fixing piece comprises a long screw rod, the long screw rod is sequentially provided through the fixing hole of the front side, the connecting hole of the front side, the connecting hole of the rear side and the fixing hole of the rear side, and the two ends of the long screw rod are threadedly sleeved with limiting nuts.

[0015] Optionally, a plurality of groups of short studs are fixedly connected to the side of the base plate away from the center base, a plurality of groups of through holes are provided through the surface of the fixed plate, the end of the short stud away from the base plate is provided through the corresponding through hole and is threadedly sleeved with a fixing nut.

[0016] All the optional technical solutions can be combined arbitrarily, and the structure after combination is not described in detail.

[0017] By the above scheme, the beneficial effects of the present application are as follows:

[0018] 1. The utility model discloses a height adjusting part is set up, and the operator can adjust the height of each group of support beam according to the actual laneway trend and observation visual angle of four groups of display screen body respectively, and the support beam drives the display screen body connected to change the height, secondly, the support beam and the display screen body are in the hinged state, and the operator can adjust the inclination angle of each group of display screen body respectively, and cooperation inclination angle stop piece carries out the inclination angle location of the display screen body adjusted. Through the structure of independent adjustable, the operator can adjust the height and inclination angle of each group of display screen body according to the actual situation and complex terrain of mine laneway, reduces the information transmission blind area of traditional fixed display screen because of angle or height limit.

[0019] 2. By installing the base plate on the upper and lower surfaces of the center base, the device can choose different installation methods according to the actual environment during actual installation. When it is necessary to install in the way of hanging from the top wall, the telescopic support can be installed on the base plate on the upper surface of the center base. When it is necessary to install in the way of ground support, the telescopic support can be installed on the base plate on the lower surface of the center base.

[0020] The above description is only a summary of the technical scheme of the utility model, in order to more clearly understand the technical means of the utility model, and can be implemented according to the content of the specification, the following preferred embodiments of the utility model are described in detail below with reference to the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 The overall appearance structure schematic diagram of the mine voice broadcast multi-face display device provided by the utility model in the fixed state of the top wall of the mine is shown in the figure.

[0022] Figure 2 The overall appearance structure schematic diagram of the mine voice broadcast multi-face display device provided by the utility model in the fixed state of the ground of the mine is shown in the figure.

[0023] Figure 3 The bottom view of the utility model is shown in the figure. Figure 1 The front view of the utility model is shown in the figure.

[0024] Figure 4 The main view of the utility model is shown in the figure. Figure 1 The exploded structure schematic diagram of the utility model is shown in the figure.

[0025] Figure 5 The exploded structure schematic diagram of the utility model is shown in the figure. Figure 1 The structure schematic diagram of the center base, the support beam, the height adjusting part, the display screen body, the inclination angle stop piece and the base plate in the utility model is shown in the figure.

[0026] Figure 6 The structure schematic diagram of the center base, the support beam, the height adjusting part, the display screen body, the inclination angle stop piece and the base plate in the utility model is shown in the figure.

[0027] Figure 7It is the exploded structural schematic view of the support beam, the display screen body and the inclination limiting piece in the utility model.

[0028] Figure 8 It is the cross-sectional view of the limiting disc, the ear plate and the inclination limiting piece matched in the utility model.

[0029] Figure 9 It is the structural schematic view of the inside of the center base and the base plate in the utility model.

[0030] Figure 10 It is the exploded structural schematic view of the telescopic support in the utility model.

[0031] Marked number in the drawing: 1, center base; 11, square frame; 111, slide rail; 12, bottom plate; 121, loudspeaker hole; 13, top beam plate; 14, cover plate; 2, controller; 3, voice broadcaster; 4, support beam; 41, sliding block; 42, limiting disc; 421, limiting hole; 43, shaft rod; 5, height adjusting piece; 51, C-shaped plate; 52, threaded adjusting rod; 53, moving seat; 54, locking nut; 6, display screen body; 61, fixing frame; 62, ear plate; 621, movable hole; 7, inclination limiting piece; 71, fixed seat; 711, threaded hole; 72, movable plate; 73, spring; 74, fixed bolt; 75, limiting pin; 8, base plate; 81, short stud; 82, fixed nut; 9, telescopic support; 91, fixed plate; 911, through hole; 92, inner stand column; 921, connecting hole; 93, outer hollow stand column; 931, fixed hole; 94, mounting plate; 95, long screw rod; 96, limiting nut. DETAILED DESCRIPTION

[0032] The specific embodiments of the utility model are described in further detail below in combination with the drawings and examples. The following examples are used to illustrate the utility model, but not to limit the scope of the utility model.

[0033] Please refer to Figures 1-10The utility model provides a kind of mine voice broadcast multi-face display device, including center pedestal 1, four groups of display screen body 6 and telescopic support 9, four groups of display screen body 6 are respectively oriented different direction and around the periphery of center pedestal 1 setting, controller 2 and voice broadcaster 3 are fixedly installed in the inside of center pedestal 1, voice broadcaster 3, display screen body 6 are electrically connected with controller 2, support beam 4 is vertically slid in the outside four quarters of center pedestal 1, height adjusting piece 5 for adjusting the height of corresponding position support beam 4 is equipped in the outside four quarters of center pedestal 1 intermediate position, display screen body 6 is hinged in the side of support beam 4 away from center pedestal 1, the hinge of the both ends of support beam 4 and display screen body 6 is equipped with the inclination angle limiting piece 7 for fixed display screen body 6 pitch angle, the upper and lower surfaces of center pedestal 1 are fixedly connected with the base plate 8 for installing telescopic support 9, and telescopic support 9 and base plate 8 can be detachably connected.

[0034] Specifically, the device can be installed at the cross intersection of mine roadway, four groups of display screen body 6 are around the periphery of center pedestal 1, and information prompt can be carried out to four different directions of cross intersection of roadway;Voice information broadcast can be carried out by the voice broadcaster 3 built-in center pedestal 1;Dual prompt of hearing and vision provides comprehensive safety warning for underground operating personnel and transport vehicles.

[0035] In actual installation process, different installation modes can be selected according to actual environment.When top wall vertical suspension mode is needed, telescopic support 9 can be installed on the base plate 8 on the upper surface of center pedestal 1, and then telescopic support 9 is fixed with roadway top wall.When ground support mode is needed, telescopic support 9 can be installed on the base plate 8 on the lower surface of center pedestal 1, and then telescopic support 9 is fixed on roadway ground.Secondly, since display screen body 6 and support beam 4 adopt hinged design, the operator can adjust the inclination angle of each group of display screen body 6 according to demand.After inclination adjustment is completed, display screen body 6 is fixed by inclination angle limiting piece 7.In addition, the actual height of the group of support beam 4 and the display screen body 6 connected therewith can also be adjusted by height adjusting piece 5, so as to adapt to different roadway trend and observation visual angle.

[0036] It should be noted that the utility model only takes four groups of display screen body 6 as an example.But in actual application, the number of display screen body 6 can be adjusted according to actual situation, and is not limited to four groups of display screen body 6.

[0037] Further, the center base 1 comprises a square frame 11, a bottom plate 12 and a top beam plate 13, the bottom plate 12 is fixedly connected to the lower surface of the square frame 11, the lower substrate 8 is fixedly connected to the middle position of the lower surface of the bottom plate 12, the top beam plate 13 is fixedly connected to the middle position of the upper surface of the square frame 11, the upper substrate 8 is fixedly connected to the upper surface of the top beam plate 13, the front and rear sides of the top beam plate 13 are hingedly connected with the cover plate 14, the surface of the bottom plate 12 is provided with a loudspeaker hole 121, and the voice broadcaster 3 is installed above the loudspeaker hole 121 through a support, and the surface of the bottom plate 12 is also provided with a ventilation hole.

[0038] Specifically, the controller 2, the voice broadcaster 3 and other related devices are all installed in the center base 1. When it is necessary to maintain and repair the devices inside the center base 1, the cover plate 14 can be flipped open for maintenance. The sound emitted by the voice broadcaster 3 is transmitted through the loudspeaker hole 121 to provide timely voice warning for personnel or working vehicles in the mine tunnel.

[0039] Further, two groups of slide rails 111 are fixedly connected to the outer sides of the square frame 11, and the slide blocks 41 are fixedly connected to the two ends of the side of the support beam 4 close to the square frame 11, and the slide blocks 41 are slidingly connected inside the corresponding slide rails 111.

[0040] Specifically, when the height of the support beam 4 is adjusted by the height adjusting part 5, the support beam 4 drives the slide blocks 41 to slide in the corresponding slide rails 111. The slide rails 111 limit and guide the slide blocks 41 to ensure that the support beam 4 slides vertically up and down.

[0041] Further, the height adjusting part 5 comprises a C-shaped plate 51 and a threaded adjusting rod 52, the C-shaped plate 51 is fixedly connected to the middle position of the outer side wall of the square frame 11, the lower end of the threaded adjusting rod 52 is rotatably connected to the lower short edge of the C-shaped plate 51, the upper end of the threaded adjusting rod 52 is rotatably penetrated through the upper short edge of the C-shaped plate 51 and extends above the C-shaped plate 51, a knob is fixedly connected to the upper end of the threaded adjusting rod 52, a moving seat 53 is fixedly connected to the middle position of the side of the support beam 4 close to the center base 1, the moving seat 53 is threadedly sleeved outside the threaded adjusting rod 52, and two groups of locking nuts 54 are threadedly sleeved outside the threaded adjusting rod 52, and the two groups of locking nuts 54 are respectively abutted on the upper and lower surfaces of the upper short edge of the C-shaped plate 51.

[0042] Specifically, when the height of the support beam 4 and the display screen body 6 needs to be adjusted, first, the two sets of locking nuts 54 are loosened to ensure that the two sets of locking nuts 54 are separated from the upper and lower surfaces of the upper short edge of the C-shaped plate 51, and the abutting state between the two is released. Then, the knob is manually rotated, the knob drives the threaded adjusting rod 52 to rotate, and in turn drives the moving seat 53 to rise or fall along the outside of the threaded adjusting rod 52, and the moving seat 53 drives the support beam 4 and the display screen body 6 to rise and fall together. After the adjustment is completed, the two sets of locking nuts 54 are tightened to abut the upper and lower surfaces of the upper short edge of the C-shaped plate 51, thereby fixing the threaded adjusting rod 52.

[0043] Further, the two ends of the support beam 4 are fixedly connected with limit discs 42, the center position of the side away from the support beam 4 of the limit disc 42 is fixedly connected with a shaft rod 43, the side close to the center base 1 of the display screen body 6 is fixedly connected with a fixed frame 61, and the two ends of the side away from the display screen body 6 of the fixed frame 61 are fixedly connected with ear plates 62. The ear plate 62 is rotatably connected to the outside of the corresponding side of the shaft rod 43.

[0044] Specifically, when the inclination angle of the display screen body 6 needs to be adjusted, the display screen body 6 is rotated, and the display screen body 6 drives the two sets of ear plates 62 to rotate around the two sets of shaft rods 43, thereby adjusting the angle of the display screen body 6.

[0045] Further, the surface of the limit disc 42 is uniformly provided with a limit hole 421 in a semicircular direction, the surface of the ear plate 62 is provided with two sets of movable holes 621, and the inclination limiting piece 7 includes a fixed seat 71 fixedly connected to the side away from the limit disc 42 of the ear plate 62. The side close to the ear plate 62 of the fixed seat 71 is in an open state, a movable plate 72 is slidably connected to the inside of the fixed seat 71, two sets of springs 73 abut between the side away from the opening of the fixed seat 71 and the movable plate 72, a threaded hole 711 is provided through the center position of the side away from the opening of the fixed seat 71, a fixed bolt 74 for limiting the movement of the movable plate 72 is screw connected in the threaded hole 711, two sets of limit pins 75 are fixedly connected to the side away from the spring 73 of the movable plate 72, and the two sets of limit pins 75 are respectively slidably connected in the two sets of movable holes 621. The hemispherical head of the limit pin 75 is elastically abutted in the limit hole 421 at the corresponding position under the action of the spring 73.

[0046] Specifically, when adjusting the inclination angle of the display screen body 6, first, the fixing bolt 74 used to limit the movement of the movable plate 72 needs to be loosened, so that the movable plate 72 can freely slide in the fixed seat 71. Then, the inclination angle of the display screen body 6 is manually adjusted, and the display screen body 6 indirectly drives the ear plate 62 and the inclination limiting piece 7 to move through the fixing frame 61. In the moving process, the hemispherical heads of the two sets of limiting pins 75 elastically abut in the limiting holes 421 in the corresponding positions under the action of the springs 73, which can effectively elastically limit the inclination angle of the adjusted display screen body 6. After the adjustment is completed, the fixing bolt 74 is manually rotated again to firmly position the movable plate 72 on one side of the opening of the fixed seat 71. At this time, the movable plate 72 cannot slide, so that the two sets of limiting pins 75 are firmly embedded in the corresponding limiting holes 421 of the limiting disc 42, thereby realizing the relative fixation of the ear plate 62 and the limiting disc 42, and further realizing the inclination fixation of the display screen body 6.

[0047] Further, the telescopic support 9 comprises a fixed plate 91, two sets of inner columns 92 and two sets of outer hollow columns 93. The fixed plate 91 is detachably installed on the side of the base plate 8 away from the central base 1. The two sets of inner columns 92 are fixedly connected to the side of the fixed plate 91 away from the base plate 8. The outer hollow columns 93 are slidably sleeved on the outer sides of the corresponding inner columns 92 and are relatively fixed through fixing pieces. The two sets of outer hollow columns 93 have a mounting plate 94 fixedly arranged at the ends away from the fixed plate 91.

[0048] Specifically, the operator can adjust the overall height of the telescopic support 9 according to actual needs. By changing the relative positions of the two sets of outer hollow columns 93 and the two sets of inner columns 92, the overall height of the telescopic support 9 can be adjusted.

[0049] Further, a plurality of vertically equidistantly arranged connecting holes 921 are formed through the front and rear sidewalls of the inner column 92. A fixing hole 931 is formed through the front and rear sidewalls of the end of the outer hollow column 93 away from the mounting plate 94. The fixing piece comprises a long screw 95. The long screw 95 is sequentially threaded through the front fixing hole 931, the front connecting hole 921, the rear connecting hole 921 and the rear fixing hole 931. The two ends of the long screw 95 are threadedly sleeved with limiting nuts 96.

[0050] Specifically, before adjusting the overall height of the telescopic support 9, the two sets of limiting nuts 96 are first removed from the two ends of the long screw 95, and then the long screw 95 is taken out. At this time, the outer hollow column 93 and the inner column 92 are in a relative sliding state. After the adjustment is completed, the fixing hole 931 of the outer hollow column 93 and the connecting hole 921 of the inner column 92 need to be aligned, and then the long screw 95 is sequentially inserted from the front fixing hole 931 and the front connecting hole 921, and then threaded out from the rear connecting hole 921 and the rear fixing hole 931. Finally, the two sets of limiting nuts 96 are threadedly sleeved on the two ends of the long screw 95.

[0051] Further, a plurality of short studs 81 are fixedly connected to the side of the substrate 8 away from the central base 1, a plurality of through holes 911 are formed on the surface of the fixing plate 91, and the ends of the short studs 81 away from the substrate 8 penetrate through the corresponding through holes 911 and are threadedly sleeved with fixing nuts 82.

[0052] Specifically, the substrate 8 and the telescopic support 9 are in a detachable state, and different installation modes can be selected according to actual needs. When installing, the fixing plate 91 is placed on the side of the substrate 8 away from the central base 1. During the placement process, the plurality of through holes 911 on the fixing plate 91 and the plurality of short studs 81 on the substrate 8 are respectively aligned and inserted, and then the fixing nuts 82 are used for fixing.

[0053] It should be noted that the controller 2, the voice broadcaster 3 and the display screen body 6 mentioned above are all suitable for a mining environment, and the connection circuits between these devices are all prior art, which will not be described herein.

[0054] The above is only the preferred embodiment of the present application, and is not used to limit the present application. It should be pointed out that for ordinary skilled in the art, without departing from the technical principles of the present application, a number of improvements and modifications can be made, and these improvements and modifications should be considered as the protection scope of the present application.

Claims

1. A voice broadcast multi-faceted display device for use in a mine, characterized by: The utility model provides a kind of multi-angle display device, including center base (1), four groups of display screen body (6) and telescopic support (9), four groups of the display screen body (6) are respectively towards different directions and are around the periphery of the center base (1) setting, the inside fixed mounting of the center base (1) is equipped with controller (2) and voice broadcaster (3), the voice broadcaster (3), display screen body (6) are electrically connected with controller (2), the outside four quarters of the center base (1) are all vertically slidably equipped with support beam (4), the outside four quarters of the center base (1) middle position are all equipped with height adjusting piece (5) for adjusting the height of corresponding position support beam (4), the display screen body (6) is hinged in the side of support beam (4) away from the center base (1), the both ends of the support beam (4) and display screen body (6) hinged place are all equipped with inclination limit piece (7) for fixing the pitch angle of display screen body (6), the upper and lower surfaces of the center base (1) are all fixedly connected with base plate (8) for installing telescopic support (9), and telescopic support (9) and base plate (8) are detachably connected.

2. The voice broadcast multi-face display device for mine as claimed in claim 1, wherein, The center base (1) includes a square frame (11), a bottom plate (12), and a top beam plate (13). The bottom plate (12) is fixedly connected to the lower surface of the square frame (11). The lower base plate (8) is fixedly connected to the middle position of the lower surface of the bottom plate (12). The top beam plate (13) is fixedly connected to the middle position of the upper surface of the square frame (11). The upper base plate (8) is fixedly connected to the upper surface of the top beam plate (13). The front and rear sides of the top beam plate (13) are hingedly connected with cover plates (14). The surface of the bottom plate (12) is provided with a loudspeaker hole (121). The voice broadcaster (3) is installed above the loudspeaker hole (121) through a support.

3. The voice broadcast multi-face display device for mine as claimed in claim 2, wherein, The square frame (11) is fixedly connected with two groups of slide rails (111) on the outside of the four quarters. The support beam (4) is fixedly connected with slide blocks (41) at both ends of the side close to the square frame (11). The slide blocks (41) are slidingly connected inside the corresponding position slide rails (111).

4. The voice broadcast multi-face display device for mine according to claim 2 or 3, characterized in that, The height adjusting piece (5) includes a C-shaped plate (51) and a threaded adjusting rod (52). The C-shaped plate (51) is fixedly connected to the middle position of the outer side wall of the square frame (11). The lower end of the threaded adjusting rod (52) is rotatably connected to the lower short edge of the C-shaped plate (51). The upper end of the threaded adjusting rod (52) is rotatably penetrated through the upper short edge of the C-shaped plate (51) and extends above the C-shaped plate (51). The support beam (4) is fixedly connected with a moving seat (53) at the middle position of the side close to the center base (1). The moving seat (53) is threadedly sleeved outside the threaded adjusting rod (52).

5. The voice broadcast multi-face display device for mine as claimed in claim 1, wherein, Both ends of the support beam (4) are fixedly connected with a limiting disc (42), one side of the limiting disc (42) away from the support beam (4) is fixedly connected with a shaft rod (43), one side of the display screen body (6) close to the central base (1) is fixedly connected with a fixing frame (61), both ends of the fixing frame (61) away from the display screen body (6) are fixedly connected with an ear plate (62), and the ear plate (62) is rotatably connected to the outer side of the corresponding shaft rod (43).

6. The voice broadcast multi-face display device for mine use according to claim 5, characterized in that, A plurality of limiting holes (421) are uniformly arranged on the surface of the limiting disc (42) along the semicircular direction, two groups of movable holes (621) are arranged on the surface of the ear plate (62), the inclination limiting piece (7) comprises a fixed seat (71), the fixed seat (71) is fixedly connected to one side of the ear plate (62) away from the limiting disc (42), one side of the fixed seat (71) close to the ear plate (62) is in an open state, the inside of the fixed seat (71) is slidably connected with a movable plate (72), two groups of springs (73) are arranged between one side of the fixed seat (71) away from the opening and the movable plate (72), a threaded hole (711) is arranged in the center of one side of the fixed seat (71) away from the opening, the inside of the threaded hole (711) is threadedly connected with a fixing bolt (74) for limiting the movement of the movable plate (72), two groups of limiting pins (75) are fixedly connected to one side of the movable plate (72) away from the springs (73), and the two groups of limiting pins (75) are slidably connected in the two groups of movable holes (621), respectively, and the hemispherical head of the limiting pin (75) is elastically abutted in the limiting hole (421) at the corresponding position under the action of the spring (73).

7. The voice broadcast multi-face display device for mine use according to claim 1, characterized in that, The telescopic support (9) comprises a fixed plate (91), two groups of inner stand columns (92) and two groups of outer hollow stand columns (93), the fixed plate (91) is detachably mounted on one side of the base plate (8) away from the central base (1), the two groups of inner stand columns (92) are fixedly connected on one side of the fixed plate (91) away from the base plate (8), the outer hollow stand column (93) is slidably sleeved on the outer side of the corresponding inner stand column (92) and is relatively fixed through a fixing member, and the two ends of the two groups of outer hollow stand columns (93) away from the fixed plate (91) are commonly fixedly provided with a mounting plate (94).

8. The voice broadcast multi-face display device for mine use according to claim 7, characterized in that, A plurality of groups of vertically equidistantly arranged connecting holes (921) are correspondingly arranged on the front and rear side walls of the inner stand column (92), a fixing hole (931) is correspondingly arranged on the front and rear side walls of one end of the outer hollow stand column (93) away from the mounting plate (94), the fixing member comprises a long screw rod (95), the long screw rod (95) penetrates the fixing hole (931) on the front side, the connecting hole (921) on the front side, the connecting hole (921) on the rear side and the fixing hole (931) on the rear side in sequence, and the two ends of the long screw rod (95) are threadedly sleeved with limiting nuts (96).

9. The voice broadcast multi-face display device for mine use according to claim 7, characterized in that, The substrate (8) is fixedly connected with a plurality of groups of short studs (81) away from one side of the central base (1), a plurality of groups of through holes (911) are formed through the surface of the fixed plate (91), and one end of the short stud (81) away from the substrate (8) penetrates through the corresponding through hole (911) and is threadedly sleeved with a fixed nut (82).

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