CN220727605U - Double track microphone lift screen - Google Patents

Abstract

The utility model belongs to the technical field of lifting screens, and particularly relates to a double-track microphone lifting screen, which comprises a lifting screen device and a lifting microphone device, wherein a host is arranged in the lifting screen device, a lifting device and a directional track are arranged in the lifting microphone device, the lifting device and the directional track are fixedly arranged on the inner side wall of the lifting microphone device, a moving end of the lifting device is in sliding connection with the directional track, a microphone of the lifting microphone device is fixedly arranged on the moving end of the lifting device, a first clearance hole is formed in the top of a shell of the lifting microphone device, a second clearance hole is formed in the top of the shell of the lifting screen device, and the host is electrically connected with the lifting microphone device.

Description

Double track microphone lift screen

Technical Field

The utility model belongs to the technical field of lifting screens, and particularly relates to a double-track microphone lifting screen.

Background

When the liquid crystal display screen lifter is needed to be used, the lifter hidden in the conference table lifts the display screen from the lower part of the conference to the surface of the table; when the display screen is not used, the lifter automatically descends, and the display screen is hidden in the conference table, so that the anti-theft and dustproof effects are realized; the surface of the desk is kept flat and beautiful, and a microphone which can also perform lifting action is generally attached to the lifting screen device.

The utility model provides a take LCD screen riser that microphone goes up and down like application number CN209595073U among the prior art, includes roll-over door (1), big panel (2), transmission rib (5), transmission spout (6), prevent tong spring (7), prevent tong start switch (9), transmission pinion (11), guide rail (12), first power motor (15), drive chain (17), crane (18) and fixed screen ear (19), its characterized in that: the anti-pinch device is characterized in that a roll-over door (1) is installed on the large panel (2) in a clearance fit manner, a primary lever transmission sheet (3) is rotatably connected to the lower side of the roll-over door (1) through a hook, a secondary lever transmission sheet (4) is hinged to the lower end of the primary lever transmission sheet (3), a transmission rib (5) is rotatably connected to the lower end of the secondary lever transmission sheet (4), a transmission chute (6) is connected to the lower end of the transmission rib (5), an anti-pinch spring (7) is further embedded in the transmission chute (6), an anti-pinch transmission sheet (8) is further arranged on the inner side of the transmission chute (6), an anti-pinch starting switch (9) is arranged below the roll-over door lower pressure transmission sheet (8), and an anti-pinch fixing part (10) is fixedly installed on the outer side of the anti-pinch starting switch (9); the rear side bottom of the lifter is fixedly provided with a first power motor (15), an output shaft of the first power motor (15) is backwards provided with a first power motor transmission tooth (16) in an interference fit manner, the rear side of the lifter is rotationally provided with a transmission small tooth (11), the transmission small tooth (11) and the first power motor transmission tooth (16) are connected with a transmission chain (17), the rear side of the lifter is vertically and symmetrically provided with a guide rail (12), the guide rail (12) is slidably provided with a lifting frame (18), the lifting frame (18) is provided with a lifting frame and guide rail connecting piece (13), the lifting frame and the guide rail connecting piece (13) are in clearance fit with the guide rail (12), the lifting frame (18) is fixedly provided with a transmission chain and the lifting connecting piece (14), the transmission chain and the lifting connecting piece (14) are matched with the transmission chain (17), the lower side of the lifter is fixedly provided with a second power motor (20), the output shaft of the second power motor (20) is also in an interference fit manner, the lifting frame (18) is provided with a transmission gear (21), the lifting frame is also fixedly provided with a transmission screw (22) through the transmission chain (21), the lifting screw (22) is fixedly arranged on the lifting frame through the inner side, the lifting piece (23) is fixedly provided with a lifting rod (24), the upper end of the lifting rod (24) is fixedly provided with a microphone (25), and the top end of the lifter is provided with a microphone outlet (26). By means of the structure, the dialogue barrel is well protected.

The lifting screen device in the prior art is adopted, and the technical problem that a moving track of a microphone lifting structure is complex is solved.

Disclosure of Invention

The utility model aims to provide a double-track microphone lifting screen, which aims to solve the technical problem that a lifting screen microphone moving track structure in the prior art is complex.

In order to achieve the above object, the dual-track microphone lifting screen provided by the embodiment of the utility model comprises a lifting screen device and a lifting microphone device, wherein a host is arranged in the lifting screen device, a lifting device and a directional track are arranged in the lifting microphone device, the lifting device and the directional track are fixedly arranged on the inner side wall of the lifting microphone device, the moving end of the lifting device is in sliding connection with the directional track, a microphone of the lifting microphone device is fixedly arranged on the moving end of the lifting device, a first clearance hole is formed in the top of a shell of the lifting microphone device, a second clearance hole is formed in the top of the shell of the lifting screen device, and the host is electrically connected with the lifting microphone device.

Preferably, a first shielding plate, a first rotating member, a first connecting member and a first sliding block are further arranged in the lifting microphone device, the first shielding plate is rotatably installed on a top plane in the shell of the lifting microphone device, the first shielding plate is close to the first empty avoidance hole, the first rotating member is rotatably installed on the inner side wall of the lifting microphone device, the first sliding block is slidably installed on the inner side wall of the shell of the lifting microphone device, one end of the first connecting member is rotatably connected with the edge position of the first rotating member, the other end of the first connecting member is connected with the first sliding block, a first push rod is outwards extended from the edge of the first rotating member and used for pushing the first shielding plate to upwards rotate to shield the first empty avoidance hole, and the moving plate of the lifting device downwards moves to be in butt with the first sliding block.

Preferably, a first protrusion is arranged on the first shielding plate, and the first protrusion is rotationally filled in the first clearance hole.

Preferably, the lifting device comprises a rack and a moving device, the rack is fixedly mounted on the inner side surface of the shell of the lifting microphone device, the moving device is slidably mounted on the directional track, the rotating end of the moving device is in meshed connection with the rack for realizing up-and-down movement, and the moving device is slidably and fixedly mounted on the top of the moving device.

Preferably, the mobile device includes movable plate, rotating electrical machines, butt spare and support piece, microphone fixed mounting in on the movable plate, the movable plate with support piece all slidable mounting in on the directional track, the movable plate is located the support piece top, the both ends of butt spare respectively with fixed connection between the movable plate with the support piece, the butt spare with support piece dislocation connection for with the mutual butt of first slider, rotating electrical machines fixed mounting in on the movable plate, just the rotating electrical machines's rotating end with the rack meshing is connected.

Preferably, a rotating screen, a displacement device, a second shielding plate, a second rotating member, a second connecting member and a second sliding block are arranged in the lifting screen device, the second shielding plate is rotatably mounted on a top plane in the shell of the lifting screen device, the second shielding plate is close to the second clearance hole, the displacement device is fixedly mounted on the inner side wall of the shell of the lifting screen device to perform up-and-down displacement, the second rotating member is rotatably mounted on the inner side wall of the shell of the lifting screen device, the second sliding block is slidably mounted on the inner side wall of the shell of the lifting screen device, one end of the second connecting member is rotatably mounted at the edge position of the second rotating member, the other end of the second connecting member is connected with the second sliding block, a second push rod is outwards extended from the edge of the second rotating member and used for pushing the second shielding plate to rotate upwards, the second clearance hole is fixedly mounted on the moving end of the displacement device, and the moving end of the moving device is blocked by the second sliding block and is abutted against the second sliding block.

Preferably, a second protrusion is arranged on the second shielding plate, and the second protrusion is rotationally filled in the second clearance hole.

Preferably, the displacement device comprises a moving bar, a first guiding device, a second guiding device, a lifting motor and a lifting plate, wherein the moving bar, the first guiding device and the second guiding device are fixedly installed on the inner side surface of a shell of the lifting screen device, the moving bar, the first guiding device and the second guiding device are arranged in parallel in pairs, the lifting motor is fixedly installed on the lifting plate, the output end of the lifting motor is meshed with the moving bar, the lifting plate is connected with the first guiding device and the second guiding device in a sliding mode, and the rotating screen is fixedly installed on the lifting plate.

Preferably, the second rotating member, the second connecting member and the second slider are both provided with two groups, and the two groups of the second rotating member, the second connecting member and the second slider are respectively provided on two inner sides of the lifting screen device, which are opposite to each other in the body. The two rotating parts respectively operate the two sides of the second shielding plate at the same time.

Preferably, limit plates are arranged at edge positions of two sides of the bottom of the lifting plate, and the limit plates extend outwards of the lifting plate and are used for being mutually abutted with the second sliding blocks.

The above technical solutions in the dual-track microphone lifting screen provided by the embodiments of the present utility model have at least one of the following technical effects:

the utility model discloses a double-track microphone lifting screen which is assembled by a lifting screen device and a lifting microphone device, wherein a lifting device for driving the microphone to lift and a directional track for guiding the moving track of the lifting device are arranged in the lifting microphone device, the lifting device and the directional track are fixedly arranged on the inner side wall of a shell of the lifting microphone device, and the directional track and a rack of the lifting device are mutually parallel, so that the track directions of the directional track and the rack are identical, the moving end of the lifting device moves up and down along the rack on the rack to drive the microphone to move up and down through a first clearance hole, and meanwhile, the moving end of the lifting device is in sliding connection with the directional track, the moving end of the lifting device moves up and down while ensuring the stability of the moving process of the moving end, a first clearance hole and a second clearance hole are respectively formed on the lifting microphone device and the lifting screen device, the first clearance hole is used for allowing the microphone to pass through, and meanwhile, a host for controlling the operation of the double-track lifting screen device is arranged in the lifting screen device, the host is connected with the rack along the rack, the moving end of the lifting device is driven by the rack, and the microphone can be stably controlled by the other side, so that the microphone can be stably moved up and down through the lifting device.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is an effect diagram of a dual-track microphone lifting screen according to an embodiment of the present utility model.

Fig. 2 is a rear view of a dual-track microphone boom screen according to an embodiment of the present utility model.

Fig. 3 is an elevation view of an internal structure of a dual-track microphone lifting screen according to an embodiment of the present utility model.

Fig. 4 is an internal structure diagram of a lifting screen device for lifting a screen of a dual-track microphone according to an embodiment of the present utility model.

Fig. 5 is an internal structural diagram of a microphone lifting device for lifting a screen of a dual-track microphone according to an embodiment of the present utility model.

Wherein, each reference sign in the figure:

10-lifting screen device 11-second clearance hole 12-host

13-rotating screen 14-displacement device 15-second shutter

16-second rotating member 17-second connecting member 18-second slider

20-lifting microphone device 21-first clearance hole 22-lifting device

23-orientation track 24-first shutter 25-first rotary member

26-first connector 27-first slider 28-microphone

141-moving bar 142-first guide 143-second guide

144-lifting motor 145-lifting plate 221-rack

222-moving device 251-first push rod 2221-moving plate

2222-rotating electric machine 2223-abutment 2224-support.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in fig. 1-5, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functionality throughout. The embodiments described below by referring to the drawings are exemplary and intended to illustrate embodiments of the utility model and should not be construed as limiting the utility model.

In the description of the embodiments of the present utility model, it should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate description of the embodiments of the present utility model and simplify description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the embodiments of the present utility model, the meaning of "plurality" is two or more, unless explicitly defined otherwise.

In the embodiments of the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured" and the like are to be construed broadly and include, for example, either permanently connected, removably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the embodiments of the present utility model will be understood by those of ordinary skill in the art according to specific circumstances.

In one embodiment of the present utility model, as shown in fig. 1 to 5, a dual-track microphone lifting screen is provided, which comprises a lifting screen device 10 and a lifting microphone device 20, wherein a host 12 is arranged in the lifting screen device 10, a lifting device 22 and a directional track 23 are arranged in the lifting microphone device 20, the lifting device 22 and the directional track 23 are fixedly installed on the inner side wall of the lifting microphone device 20, the moving end of the lifting device 22 is in sliding connection with the directional track 23, a microphone 28 of the lifting microphone device 20 is fixedly installed on the moving end of the lifting device 22, a first clearance hole 21 is arranged at the top of a shell of the lifting microphone device 20, a second clearance hole 11 is arranged at the top of the shell of the lifting screen device 10, and the host 12 is electrically connected with the lifting microphone device 20.

The double-track microphone lifting screen is assembled by a lifting screen device 10 and a lifting microphone device 20, wherein a lifting device 22 for driving a microphone 28 to lift and a directional track 23 for guiding the moving track of the lifting device 22 are arranged in the lifting microphone device 20, the lifting device 22 and the directional track 23 are fixedly arranged on the inner side wall of a shell of the lifting microphone device 20, and the directional track 23 and a rack 221 of the lifting device 22 are mutually parallel, so that the track directions of the directional track 23 and the rack 221 are the same, the moving end of the lifting device 22 moves up and down along the rack 221 on the rack 221 to drive the microphone 28 to move up and down through a first empty-avoiding hole 21, meanwhile, the moving end of the lifting device 22 is connected with the directional track 23 in a sliding way, the moving end of the lifting device 22 moves up and down while the moving end of the lifting device 22 moves stably, A first clearance hole 21 and a second clearance hole 11 are respectively arranged on the lifting microphone device 20 and the lifting screen device 10, the first clearance hole 21 is used for allowing a microphone 28 to pass through, the second clearance hole 11 is used for allowing a rotary screen 13 to pass through, meanwhile, a host 12 for controlling the operation of a double-track microphone lifting screen device is arranged in the lifting screen device 10, the host 12 is electrically connected with the lifting microphone device 20, on one hand, the audio of the output microphone 28 is received, on the other hand, the lifting device 22 is controlled, the use and the retraction of the microphone 28 are controlled, so that the microphone 28 can be stably lifted by only one moving track and one auxiliary track in the lifting microphone device 20 to improve the moving stability of the microphone 28, the structure is simpler.

In another embodiment of the present utility model, as shown in fig. 1 to 3 and fig. 5, a first shielding plate 24, a first rotating member 25, a first connecting member 26 and a first sliding block 27 are further disposed in the lifting microphone device 20, the first connecting member 26 may be a steel wire, for realizing connection between the first rotating member 25 and the first sliding block 27, two dislocated second limiting wheels are disposed between the first rotating member 25 and the first sliding block 27 at intervals, the steel wire bypasses the two second limiting wheels in an S-shape, the first shielding plate 24 is rotatably mounted on a top plane in a housing of the lifting microphone device 20, the first shielding plate 24 is disposed close to the first empty hole 21, the first rotating member 25 is rotatably mounted on an inner side wall of the lifting microphone device 20, the first sliding block 27 is slidably mounted on an inner side wall of the housing of the lifting microphone device 20, one end of the first connecting member 26 is rotatably connected with an edge position of the first rotating member 25, and the edge of the first sliding block 27 is outwardly extended with the first rotating member 25, a first push rod 251 is disposed on an edge of the first rotating member 25, when the steel wire bypasses the two second limiting wheels, the first shielding plate 24 is rotatably mounted on the top plane in the housing of the lifting microphone device 20, the first shielding plate 24 is rotatably mounted close to the first empty hole 21, the first shielding plate 22 is rotatably driven by the first sliding block 21, and the first sliding block 21 is rotated by the first sliding block 21, and the first sliding block 21 is moved by the first sliding block 21 to the first sliding block 21, when the first sliding block 21 is rotated by the first sliding block 21, and the first sliding block 21 is moved down through the first sliding block 21, and the first sliding block 21 is moved by the first sliding block 21.

In another embodiment of the present utility model, as shown in fig. 3 and 5, a first protrusion (not shown) is provided on the first shielding plate 24, and the first protrusion is rotatably filled in the first hollow hole 21, and when the first shielding plate 24 shields the first hollow hole 21, the first protrusion fills the first hollow hole 21 so that there is no depression on the top plane of the elevating microphone device 20.

In another embodiment of the present utility model, as shown in fig. 3 and 5, the lifting device 22 includes a rack 221 and a moving device 222, the rack 221 is fixedly installed on the inner side of the housing of the lifting microphone device 20, the moving device 222 is slidably installed on the directional track 23, and the rotating end of the moving device 222 is engaged with the rack 221 for implementing the up-and-down movement, and is slidably and fixedly installed on the top of the moving device 222, so that the moving device 222 moves up and down along the path of the rack 221.

In another embodiment of the present utility model, as shown in fig. 3 and 5, the moving device 222 includes a moving plate 2221, a rotating motor 2222, an abutment member 2223 and a supporting member 2224, the microphone 28 is fixedly installed on the moving plate 2221, the moving plate 2221 and the supporting member 2224 are both slidably installed on the directional rail 23, the moving plate 2221 is located above the supporting member 2224, two ends of the abutment member 2223 are fixedly connected between the moving plate 2221 and the supporting member 2224, the abutment member 2223 is in dislocating connection with the supporting member 2224 and is used for mutually abutting with the first slider 27, the rotating motor 2222 is fixedly installed on the moving plate 2221, and the rotating end of the rotating motor 2222 is meshed with the rack 221, and the action between the rotating motor 2222 and the rack 221 drives the moving device 222 to move in position, thereby driving the microphone 28 to rise and fall.

In another embodiment of the present utility model, as shown in fig. 1 to 4, a rotating screen 13, a displacement device 14, a second shielding plate 15, a second rotating member 16, a second connecting member 17 and a second sliding block 18 are disposed in the lifting screen device 10, the second connecting member 17 may be a steel wire, two dislocated second limiting wheels are disposed between the second rotating member 17 and the second sliding block 18 at intervals, the steel wire bypasses the two second limiting wheels in an S-shape, the steel wire is used for realizing that the rotating screen 13 can rotate a certain angle, so that the rotating screen 13 can tilt to a certain extent, the use is convenient for a user, a secondary screen is disposed on the back surface of the rotating screen 13, the viewing is convenient for a person on the other side, the second shielding plate 15 is rotatably mounted on the top plane in the housing of the lifting screen device 10, the second shielding plate 15 is disposed near the second hollow-avoiding hole 11, the displacement device 14 is fixedly mounted on the inner side wall of the housing of the lifting screen device 10 to perform up-down displacement, the second rotating member 16 is rotatably mounted on the inner side wall of the housing of the screen lifting device 10, the second sliding block 18 is slidably mounted on the inner side wall of the housing of the screen lifting device 10, one end of the second connecting member 17 is rotatably mounted at the edge position of the second rotating member 16, the other end of the second connecting member 17 is connected with the second sliding block 18, the edge of the second rotating member 16 is outwardly extended and provided with a second push rod for pushing the second shielding plate 15 to rotate upwards to shield the second clearance hole 11, the rotating screen 13 is fixedly mounted on the moving end of the displacement device 14, the moving end of the displacement device 222 moves downwards to abut against the second sliding block 18, the second rotating member 16 is driven to rotate under the connection of the second connecting member 17 by applying downward force to the second sliding block 18, and then the second push rod pushes the second shielding plate 15 to rotate upwards to shield the second clearance hole 11, when the movable device 222 needs to be opened, the movable end of the movable device is separated from the second slider 18, and the second shielding plate 15 rotates downwards to avoid the second clearance hole 11.

In another embodiment of the present utility model, as shown in fig. 3 to 4, a second protrusion (not shown) is provided on the second shielding plate 15, and the second protrusion is rotatably filled in the second space-avoiding hole 11, and when the second shielding plate shields the first space-avoiding hole, the second space-avoiding hole 11 is filled with the second protrusion, so that the top plane of the device for lifting and rotating the screen 13 will not be depressed.

In another embodiment of the present utility model, as shown in fig. 3 to 4, the displacement device 14 includes a moving bar 141, a first guiding device 142, a second guiding device 143, a lifting motor 144 and a lifting plate 145, where the moving bar 141, the first guiding device 142 and the second guiding device 143 are fixedly installed on the inner side of the housing of the lifting screen device 10, the moving bar 141, the first guiding device 142 and the second guiding device 143 are arranged in parallel, the lifting motor 144 is fixedly installed on the lifting plate 145, the output end of the lifting motor 144 is connected with the moving bar 141 in a meshed manner, the lifting plate 145 is slidably connected with the first guiding device 142 and the second guiding device 143, the rotating screen 13 is fixedly installed on the lifting plate 145, and the lifting motor 144 rotates to push the lifting plate 145 to move along the moving bar 141, and the lifting plate 145 is caused by the action of the first guiding device 142 and the second guiding device 143.

In another embodiment of the present utility model, as shown in fig. 3 to 4, two second rotating members 16, second connecting members 17 and second sliding blocks 18 are provided, and two sets of second rotating members 16, second connecting members 17 and second sliding blocks 18 are respectively disposed on two opposite inner sides of the movable body of the lift screen apparatus 10. The two rotating parts respectively operate the two sides of the second shielding plate 15 at the same time, and as the second clearance hole 11 is used for allowing the rotary screen 13 to pass through, the second shielding plate 15 is too long due to a certain length, and the two ends of the second shielding plate 15 are pushed at the same time, so that the second shielding plate 15 can be driven to rotate better.

In another embodiment of the present utility model, as shown in fig. 3 to 4, limiting plates are disposed at two side edges of the bottom of the lifting plate 145, and the limiting plates extend towards the outside of the lifting plate 145, so as to be used for abutting against the second sliding block 18, effectively shortening the length of the lifting plate 145, saving materials, and reducing the weight of the lifting plate 145.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.

Claims (10)

1. A double track microphone lift screen, its characterized in that: including lift screen device and lift microphone device, be provided with the host computer in the lift screen device, be provided with elevating gear and directional track in the lift microphone device, elevating gear with directional track all fixed mounting in on the inside wall of lift microphone device, just elevating gear's mobile end with sliding connection between the directional track, the microphone fixed mounting of lift microphone device in on elevating gear's the mobile end, the casing top of lift microphone device is provided with first clearance hole, the casing top of lift screen device is provided with the second clearance hole, the host computer with be connected electrically between the lift microphone device.

2. The dual track microphone elevator screen of claim 1, wherein: still be provided with first shielding plate, first rotating member, first connecting piece and first slider in the lift microphone device, first shielding plate rotate install in the top plane in the casing of lift microphone device, just first shielding plate is close to first clearance hole sets up, first rotating member rotate install in on the inside wall of lift microphone device, first slider slidable mounting in on the casing inside wall of lift microphone device, the one end of first connecting piece with the edge position of first rotating member rotates to be connected, the other end of first connecting piece with first slider is connected, just the outside extension in edge of first rotating member is provided with first push rod, is used for promoting first shielding plate upwards rotates to shelter from first clearance hole, elevating gear's movable plate moves down and is first slider emergence butt.

3. The dual-track microphone boom recited in claim 2, wherein: the first shielding plate is provided with a first bulge, and the first bulge is filled in the first clearance hole in a rotating mode.

4. The dual-track microphone boom recited in claim 2, wherein: the lifting device comprises a rack and a moving device, wherein the rack is fixedly arranged on the inner side surface of a shell of the lifting microphone device, the moving device is slidably arranged on the directional track, the rotating end of the moving device is in meshed connection with the rack for realizing up-and-down movement, and the moving device is slidably and fixedly arranged on the top of the moving device.

5. The dual track microphone elevator screen of claim 4, wherein: the mobile device includes movable plate, rotating electrical machines, butt spare and support piece, microphone fixed mounting in on the movable plate, the movable plate with support piece all slidable mounting in on the directional track, the movable plate is located the support piece top, the both ends of butt spare respectively with the movable plate with fixed connection between the support piece, the butt spare with support piece dislocation connection for with the mutual butt of first slider, rotating electrical machines fixed mounting in on the movable plate, just the rotating end of rotating electrical machines with the rack meshing is connected.

6. The dual track microphone elevator screen of claim 4, wherein: the lifting screen device is internally provided with a rotary screen, a displacement device, a second shielding plate, a second rotary piece, a second connecting piece and a second sliding block, wherein the second shielding plate is rotatably installed on the top plane in the shell of the lifting screen device, the second shielding plate is close to the second clearance hole, the displacement device is fixedly installed on the inner side wall of the shell of the lifting screen device for vertical displacement, the second rotary piece is rotatably installed on the inner side wall of the shell of the lifting screen device, the second sliding block is slidably installed on the inner side wall of the shell of the lifting screen device, one end of the second connecting piece is rotatably installed at the edge position of the second rotary piece, the other end of the second connecting piece is connected with the second sliding block, the edge of the second rotary piece is outwards extended and provided with a second push rod for pushing the second shielding plate to upwards rotate to shield the second clearance hole, the rotary screen is fixedly installed on the moving end of the displacement device, and the moving end of the moving device moves downwards to abut against the second sliding block.

7. The dual track microphone elevator screen of claim 6, wherein: the second shielding plate is provided with a second bulge, and the second bulge is rotationally filled in the second clearance hole.

8. The dual track microphone elevator screen of claim 6, wherein: the displacement device comprises a moving strip, a first guiding device, a second guiding device, a lifting motor and a lifting plate, wherein the moving strip, the first guiding device and the second guiding device are fixedly installed on the inner side face of a shell of the lifting screen device, the moving strip, the first guiding device and the second guiding device are arranged in parallel in pairs, the lifting motor is fixedly installed on the lifting plate, the output end of the lifting motor is meshed with the moving strip, the lifting plate is connected with the first guiding device and the second guiding device in a sliding mode, and the rotary screen is fixedly installed on the lifting plate.

9. The dual track microphone elevator screen of claim 8, wherein: the second rotating piece, the second connecting piece and the second sliding block are all provided with two, and two groups of the second rotating piece, the second connecting piece and the second sliding block are respectively arranged on two inner side surfaces which can be opposite in the lifting screen device, and the two rotating pieces respectively operate two sides of the second shielding plate simultaneously.

10. The dual track microphone elevator screen of claim 8, wherein: limiting plates are arranged at the edge positions of two sides of the bottom of the lifting plate, and the limiting plates extend outwards and are used for being mutually abutted with the second sliding blocks.