Angle-adjustable microphone lifter and conference terminal

Abstract

The application discloses an angle-adjustable microphone lifter and a conference terminal, and belongs to the technical field of conference equipment. The lifter comprises a shell, a microphone, an elevation angle device, a rotator and a lifting assembly. The elevation angle device comprises a base, a frame, a driving source, a transmission member and an angle conversion member. The frame is connected with the base through a rotating connecting member. The driving source drives the angle conversion member to adjust the pitch angle of the microphone through the transmission member. The rotator realizes horizontal rotation. The lifting assembly drives the whole to lift. The third rotating connecting member adopts a damping adjusting shaft. The scheme integrates automatic adjustment and manual adjustment functions. The damping shaft is convenient for users to adjust the angle in real time, improves sound adaptation and operation convenience, is suitable for various conference scenes, can be embedded on the desktop of the conference terminal, and optimizes conference process and communication efficiency.

Description

Technical Field

[0001] This application relates to the field of conference equipment technology, and in particular to an angle-adjustable microphone lifter and a conference terminal. Background Technology

[0002] As the basic speaking unit in a conference system, the microphone's sound pickup directly impacts meeting quality. Ideally, the microphone should be directly facing the sound source for optimal pickup. However, in real-world conference scenarios, varying speaker heights make it difficult to adapt a fixed-height microphone to all users. Furthermore, speakers naturally change posture during presentations, such as leaning forward while standing or turning their head while seated, all of which cause sound source shifts. Existing static, fixed-angle conference microphones fail to meet users' dynamic sound pickup needs, frequently resulting in the loss of the optimal pickup angle between the sound source and the microphone. This deficiency not only causes audio quality issues such as signal attenuation and reduced signal-to-noise ratio but also forces speakers to frequently adjust their posture to fit the microphone, severely impacting normal meeting flow and communication efficiency. Utility Model Content

[0003] To overcome the problems existing in the related technologies, this application provides an angle-adjustable microphone lifter and conference terminal. The microphone lifter achieves automatic adjustment of microphone height, pitch angle and horizontal rotation by integrating an elevation sensor, a rotator and a lifting assembly, and can also support manual operation with the help of a damping adjustment shaft, thereby improving ease of use and sound reception adaptability.

[0004] The first aspect of this application provides an angle-adjustable microphone lifter, including a housing, a microphone, an elevation sensor, a rotator, and a lifting assembly;

[0005] The top of the housing has an opening for the microphone to enter and exit, and the elevation sensor, rotator and lifting assembly are all located inside the housing;

[0006] The elevation sensor includes a base, a frame, a drive source, a transmission component, and an angle conversion component. The first end of the frame is rotatably connected to the base via a first rotating connector, and the second end is rotatably connected to the base via a second rotating connector. The second end also has an extension that passes through the base. The drive source is mounted on the frame, and its output end is connected to the transmission component. The transmission component passes through the extension and is hinged to the angle conversion component. The angle conversion component is rotatably connected to the extension of the frame via a third rotating connector. The microphone is mounted on the angle conversion component.

[0007] The rotator drives the frame to rotate around the first rotating connector, and the lifting assembly drives the base to rise and fall along the height direction of the shell.

[0008] The third rotating connector is a damping adjustment shaft.

[0009] In some embodiments, the rotator includes a first motor, a first driving gear, and a first driven gear;

[0010] The first motor is located at the bottom of the base, and its output shaft passes through the base and is connected to the first driving gear. The first driven gear is sleeved on the first rotating connecting member, which is a rotating shaft. The first driving gear and the first driven gear are connected by belt drive to drive the frame to rotate.

[0011] In some embodiments, the rotator further includes an angle limiting unit for detecting the rotation angle of the frame and limiting the rotation stroke of the frame.

[0012] In some embodiments, the base includes a lifting plate, a connecting plate, and a support plate;

[0013] The connecting plate is horizontally positioned at the end of the lifting plate, and the support plate is horizontally positioned at the top of the lifting plate. The lifting plate, connecting plate, and support plate together form an installation space for accommodating the frame. The connecting plate has a shaft hole for the first rotating connector to pass through. The support plate is positioned on the bearing mounting position. The second rotating connector is a bearing. The outer ring of the bearing is fixed to the bearing mounting position. The inner ring of the bearing is connected to the second end of the frame. The extension passes through the bearing and extends out of the installation space.

[0014] In some embodiments, the lifting assembly includes a lifting motor, a second driving gear, a second driven gear, and a mounting block. The lifting motor is located inside the housing, and its output end is connected to the second driving gear. The second driven gear is rotatably mounted on the mounting block, which is located inside the housing. The second driving gear and the second driven gear are connected by a belt drive. The lifting plate is fixedly connected to the belt. A guide rail is provided inside the housing, and the lifting plate is provided with a slider that slides with the guide rail.

[0015] In some embodiments, a limiting protrusion is provided on the second end face of the frame, and the support plate is provided with an arc-shaped groove for the limiting protrusion to be inserted, the central angle of the arc-shaped groove corresponding to the maximum rotation angle of the frame.

[0016] In some embodiments, the drive source includes a second motor and a drive rack;

[0017] The transmission rack extends along the height of the frame, and one end of the transmission rack is connected to the transmission component. The output end of the second motor is provided with a drive gear, which meshes with the transmission rack.

[0018] In some embodiments, the frame is further provided with a displacement detection unit for detecting the displacement of the transmission rack to limit the pitch angle range of the microphone.

[0019] In some embodiments, the transmission component includes a pull rod and a connecting rod. One end of the pull rod is connected to a transmission rack, and the other end is hinged to the connecting rod. The connecting rod is hinged to the angle conversion component. An elastic buffer is sleeved on the outer periphery of the pull rod. One end of the elastic buffer abuts against the transmission rack, and the other end abuts against the inner wall of the frame.

[0020] The top end face of the housing is also provided with a control panel, which has buttons.

[0021] A second aspect of this application provides a conference terminal, including a desktop and the aforementioned angle-adjustable microphone lifter, the angle-adjustable microphone lifter being mounted on the desktop.

[0022] The technical solution provided in this application may include the following beneficial effects:

[0023] The microphone lifter provided by this utility model allows the microphone to automatically swing to the conference position after being raised, without the need for manual intervention. At the same time, users can manually adjust the microphone height, horizontal rotation, and tilt angle at any time during the speaking process according to their actual sound pickup needs, or control the microphone height, horizontal rotation, and tilt angle through the buttons on the control panel, making it easy to operate. Attached Figure Description

[0024] The above and other objects, features and advantages of this application will become more apparent from the more detailed description of exemplary embodiments thereof in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments thereof.

[0025] Figure 1 This is a schematic diagram of the structure of an angle-adjustable microphone lifter shown in an embodiment of this application;

[0026] Figure 2 This is a schematic diagram of the elevation sensor structure shown in the embodiments of this application;

[0027] Figure 3 This is a schematic diagram of the structure of the rotator shown in the embodiments of this application;

[0028] Figure 4 This is a schematic diagram of the structure of the elevation sensor after the frame is disassembled, as shown in an embodiment of this application;

[0029] Figure 5 This is a schematic diagram of the frame structure shown in the embodiments of this application;

[0030] Figure 6 This is a schematic diagram of the support plate structure shown in an embodiment of this application;

[0031] Figure 7 This is a schematic diagram of the lifting assembly shown in an embodiment of this application.

[0032] Figure label:

[0033] 1. Shell;

[0034] 2. Microphone;

[0035] 3. Elevation sensor; 30. Base; 300. Lifting plate; 301. Connecting plate; 302. Support plate; 3020. Arc groove; 31. Frame; 310. Limiting protrusion; 32. Drive source; 320. Second motor; 321. Transmission rack; 33. Transmission component; 330. Tie rod; 331. Connecting rod; 332. Elastic buffer; 34. Angle conversion component; 35. First rotating connector; 36. Second rotating connector; 37. Extension; 38. Third rotating connector; 39. Displacement detection unit;

[0036] 4. Rotator; 40. First motor; 41. First drive gear; 42. First driven gear; 43. Angle limiting unit;

[0037] 5. Lifting assembly; 50. Lifting motor; 51. Second drive gear; 52. Second driven gear; 53. Mounting block;

[0038] 6. Control Panel. Detailed Implementation

[0039] Preferred embodiments of the present application will now be described in more detail with reference to the accompanying drawings. While preferred embodiments of the present application are shown in the drawings, it should be understood that the present application may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to make the present application more thorough and complete, and to fully convey the scope of the present application to those skilled in the art.

[0040] The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The singular forms “a,” “the,” and “the” used in this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0041] It should be understood that although the terms "first," "second," "third," etc., may be used in this application to describe various information, this information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, without departing from the scope of this application, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0042] like Figures 1 to 7 As shown, this utility model proposes an angle-adjustable microphone lifter, including a housing 1, a microphone 2, an elevation angler 3, a rotator 4, and a lifting assembly 5;

[0043] The top of the housing 1 is provided with an opening for the microphone 2 to enter and exit, and the elevation sensor 3, the rotator 4 and the lifting assembly 5 are all located inside the housing 1;

[0044] The elevation sensor 3 includes a base 30, a frame 31, a drive source 32, a transmission component 33, and an angle conversion component 34. The first end of the frame 31 is rotatably connected to the base 30 via a first rotating connector 35, and the second end is rotatably connected to the base 30 via a second rotating connector 36. The second end is provided with an extension 37 that passes through the base 30. The drive source 32 is mounted on the frame 31, and its output end is connected to the transmission component 33. The transmission component 33 passes through the extension 37 and is hinged to the angle conversion component 34. The angle conversion component 34 is rotatably connected to the extension 37 of the frame 31 via a third rotating connector 38. The microphone 2 is mounted on the angle conversion component 34.

[0045] The rotator 4 drives the frame 31 to rotate around the first rotating connector 35, and the lifting assembly 5 drives the base 30 to rise and fall along the height direction of the shell 1.

[0046] The third rotating connector 38 is a damping adjustment shaft.

[0047] Specifically, the housing 1 is embedded in a conference table, lectern, or podium where speeches are given. The housing 1 is a hollow cuboid structure, and its material can be aluminum alloy or engineering plastic. The top of the housing 1 has an opening for the microphone 2 to extend or retract. The lifting assembly 5 can use a rack and pinion drive, a screw and nut drive, or a belt drive. To ensure the overall structural compactness, a belt drive structure is preferred for the lifting assembly 5. The side wall of the housing 1 has a vertical guide rail for guiding the sliding of the lifting assembly 5. The elevation sensor 3 is used to adjust the pitch angle of the microphone 2. The drive source 32 is used to achieve electric adjustment of the microphone 2. The drive source 32 can use a rack and pinion drive or a screw and nut drive. The power of the drive source 32 is converted into linear movement along the height direction of the housing 1 through the rack and pinion or screw and nut, and then drives the angle conversion component 34 to rotate around the damping adjustment shaft through the transmission component 33, thereby adjusting the pitch angle of the microphone 2. The third rotating connector 38 adopts a damping adjustment shaft design. On the one hand, it can effectively suppress the vibration of the microphone 2 during the adjustment process. After achieving a specific pitch angle through the tilter, the positioning stability can be ensured. On the other hand, it can provide a certain damping force for the angle conversion component 34. When the user manually adjusts the pitch and horizontal angle of the microphone 2, the force applied by the user to the microphone 2 is greater than the damping force of the damping adjustment shaft, which can drive the angle conversion component 34 to rotate, thereby changing the vertical pitch angle of the microphone 2. At the same time, the damping force ensures the stability after manual adjustment.

[0048] Furthermore, the aforementioned rotator 4 includes a first motor 40, a first driving gear 41, and a first driven gear 42;

[0049] The first motor 40 is located at the bottom of the base 30. Its output shaft passes through the base 30 and is connected to the first driving gear 41. The first driven gear 42 is sleeved on the first rotating connecting member 35. The first rotating connecting member 35 is a rotating shaft. The first driving gear 41 and the first driven gear 42 are connected by belt drive to drive the frame 31 to rotate.

[0050] Specifically, the first motor 40 can be a stepper motor or a servo motor to achieve precise rotation control. The first driven gear 42 is fixed to the rotating shaft by a keyway or bolt fastening to ensure reliable power transmission. As a preferred embodiment, the first driving gear 41 adopts a helical gear design to reduce operating noise, and the gear material is selected from nylon or powder metallurgy steel to balance strength and wear resistance. When manually adjusting the horizontal angle of the microphone 2, the user holds the microphone 2 and rotates it clockwise or counterclockwise. The first driving gear 41 and the first driven gear 42 drive the first motor 40 to rotate, thereby adjusting the horizontal angle of the microphone 2. When the microphone 2 is stationary, the first motor 40 provides resistance to maintain the horizontal stability of the microphone 2.

[0051] Furthermore, the aforementioned rotator 4 also includes an angle limiting unit 43, which is used to detect the rotation angle of the frame 31 and limit the rotation stroke of the frame 31.

[0052] Specifically, the angle limiting unit 43 can use a rotary encoder or a Hall sensor to realize the angle detection function. The rotary encoder can be installed on the output shaft of the first motor 40, and calculates the rotation angle of the frame 31 by detecting the number of rotations of the motor rotor. The Hall sensor can be installed on the frame 31, while the magnet is installed at the end of the first rotating connector 35. The Hall sensor and the magnet are arranged opposite each other, and the rotation angle is sensed by detecting changes in the magnetic field. In addition, the angle limiting unit 43 can also be set as a limit switch. When the frame 31 rotates to a preset angle, the limit switch is triggered to cut off the motor power. As a preferred embodiment, the angle limiting unit 43 can be linked with the control panel 6, allowing users to customize the required rotation angle limit.

[0053] Furthermore, the aforementioned base 30 includes a lifting plate 300, a connecting plate 301, and a support plate 302;

[0054] The connecting plate 301 is horizontally disposed at the end of the lifting plate 300, and the support plate 302 is horizontally disposed at the top of the lifting plate 300. The lifting plate 300, the connecting plate 301, and the support plate 302 enclose and form an installation space for accommodating the frame 31. The connecting plate 301 is provided with a shaft hole for the first rotating connecting member 35 to pass through. The support plate 302 is disposed on the bearing mounting position. The second rotating connecting member 36 is a bearing. The outer ring of the bearing is fixed to the bearing mounting position. The inner ring of the bearing is connected to the second end of the frame 31. The extension 37 passes through the bearing and extends out of the installation space.

[0055] Specifically, the lifting plate 300, as the main structure of the base 30, is used for the microphone's lifting function. Its side has a fastening plate that mates with the lifting assembly 5. The fastening plate has serrations adapted to the belt tooth structure. After the fastening plate engages and locks with the belt, it is secured to the lifting plate 300 with bolts. The connecting plate 301 forms the bottom support surface of the frame 31 through a horizontal extension structure. The shaft hole uses an interference fit to ensure stable rotation of the shaft. The support plate 302 forms the top constraint surface of the frame 31 through a horizontal extension structure. The bearing mounting position uses a countersunk hole structure to fix the outer ring of the bearing. The extension 37 connects to the inner ring of the bearing using a key connection to transmit torque. The installation space is radially limited by a three-sided enclosure structure.

[0056] Furthermore, the aforementioned lifting assembly 5 includes a lifting motor 50, a second driving gear 51, a second driven gear 52, and a mounting block 53. The lifting motor 50 is located inside the housing 1, and its output end is connected to the second driving gear 51. The second driven gear 52 is rotatably mounted on the mounting block 53, which is located inside the housing 1. The second driving gear 51 and the second driven gear 52 are connected by a belt drive. The lifting plate 300 is fixedly connected to the belt. The housing 1 is provided with a guide rail, and the lifting plate 300 is provided with a slider that slides with the guide rail.

[0057] The lifting motor 50 can be a stepper motor or a servo motor, and its output end is connected to the second drive gear 51 via a coupling. The guide rail can be a linear guide rail or a V-shaped guide rail, and the guide part is a slider or roller structure that matches the shape of the guide rail. As a preferred embodiment, the guide part is equipped with a self-lubricating bearing to reduce frictional resistance.

[0058] In this embodiment, the precise lifting of the lifting plate 300 is achieved through a motor-driven gear belt structure, wherein the cooperation between the guide rail and the guide part ensures the stability of the lifting process. The rotation of the motor drives the second driving gear 51 to rotate, and the meshing motion of the second driving gear 51 and the second driven gear 52 is converted into the linear motion of the lifting plate 300.

[0059] Furthermore, a limiting protrusion 310 is provided on the second end face of the frame 31, and the support plate 302 is provided with an arc-shaped groove 3020 for the limiting protrusion 310 to be inserted. The central angle of the arc-shaped groove 3020 corresponds to the maximum rotation angle of the frame 31. The limiting protrusion 310 can be made of metal or plastic, and its cross-sectional shape can be circular, rectangular, or other polygonal. The processing method of the arc-shaped groove 3020 includes milling, stamping, or injection molding. The groove depth must ensure that the limiting protrusion 310 can slide smoothly but not fall out. The central angle of the arc-shaped groove 3020 can be set to a range of 30°-180°, and the specific value can be adjusted according to the actual rotation requirements. As a preferred embodiment, a wear-resistant bushing can be provided between the limiting protrusion 310 and the arc-shaped groove 3020 to reduce friction loss.

[0060] In this embodiment, the rotation range of the frame 31 is precisely controlled by a mechanical limiting structure, wherein the cooperation between the limiting protrusion 310 and the arc-shaped groove 3020 effectively prevents the rotation angle from exceeding the limit. Specifically, when the rotator 4 drives the frame 31 to rotate or the microphone 2 is manually rotated, the limiting protrusion 310 slides along the arc-shaped groove 3020 until it contacts the end of the groove, thereby achieving physical limiting of the rotation angle.

[0061] Furthermore, the aforementioned drive source 32 includes a second motor 320 and a transmission rack 321;

[0062] The transmission rack 321 extends along the height of the frame 31, and one end of the transmission rack 321 is connected to the transmission component 33. The output end of the second motor 320 is provided with a drive gear, which meshes with the transmission rack 321. The second motor 320 can be a stepper motor or a servo motor to achieve precise control of the displacement of the transmission rack 321. Linear transmission is achieved by driving the transmission rack 321 with a motor, resulting in higher transmission accuracy and response speed.

[0063] Furthermore, the frame 31 is also equipped with a displacement detection unit 39, used to detect the displacement of the transmission rack 321 to limit the pitch angle range of the microphone 2. The displacement detection unit 39 can be implemented using a photoelectric encoder, a Hall sensor, or a linear potentiometer. The photoelectric encoder calculates the displacement by detecting the marking points on the transmission rack 321; the Hall sensor outputs a signal by sensing the position change of the magnet on the transmission rack 321; the linear potentiometer is linked to the transmission rack 321 through a sliding contact, converting the displacement into a change in resistance. The displacement detection unit 39 is installed on the frame 31 near the transmission rack 321, and the detection signal is transmitted to the control circuit via a cable. The control circuit presets a displacement threshold, and cuts off the power supply to the second motor 320 when the detected value reaches the threshold.

[0064] In this embodiment, the pitch angle of the microphone 2 is precisely controlled by real-time monitoring of the displacement of the transmission rack 321. The displacement detection unit 39 converts the mechanical displacement into an electrical signal, which, in conjunction with a preset threshold, enables the angle limiting function, preventing damage to components due to overtravel of the mechanical structure.

[0065] Furthermore, the aforementioned transmission component 33 includes a pull rod 330 and a connecting rod 331. One end of the pull rod 330 is connected to the transmission rack 321, and the other end is hinged to the connecting rod 331. The connecting rod 331 is hinged to the angle conversion component 34. An elastic buffer 332 is sleeved on the outer periphery of the pull rod 330. One end of the elastic buffer 332 abuts against the transmission rack 321, and the other end abuts against the inner wall of the frame 31.

[0066] The top end face of the housing 1 is also provided with a control panel 6, which is equipped with buttons.

[0067] Specifically, the pull rod 330 is made of rigid metal and is detachably connected to the transmission rack 321 via threads or snap-fit. Both ends of the pull rod 331 have hinge holes, forming a rotating pair with the pull rod 330 and the angle conversion component 34 via pins. The elastic buffer 332 is preferably a helical spring, with its inner diameter clearance-fitted to the outer diameter of the pull rod 330. Both ends of the spring are welded and fixed to the limiting bosses on the inner wall of the transmission rack 321 and the frame 31, respectively. The compression deformation of the elastic buffer 332 absorbs the impact load during transmission, effectively solving the mechanical vibration problem generated by the rack and pinion transmission system during sudden starts and stops. When the second motor 320 drives the transmission rack 321 to move, the elastic buffer 332 can buffer the instantaneous force exerted by the transmission component 33 on the angle conversion component 34, avoiding jitter during the pitch adjustment of the microphone 2. This improves the smoothness and positioning accuracy of the angle adjustment, while reducing the wear rate of moving parts. The control panel 6 is electrically connected to the microphone lifter and can directly control the lifting, rotation, and pitch angle adjustment of the microphone 2 via buttons. In addition, the control panel 6 can adopt a touch screen design to integrate more control functions. Furthermore, the desktop can be reserved with cable channels or a wireless transmission module for convenient power and signal transmission.

[0068] This invention also proposes a conference terminal, including a desktop and an adjustable microphone lifter, which is embedded in the desktop. Specifically, by integrating the adjustable microphone lifter into the desktop, the conference terminal achieves optimized configuration of the conference speaking units. By integrating the adjustable microphone lifter with the conference terminal desktop, the problem of poor sound pickup caused by differences in speaker height or body posture in traditional fixed microphones is solved.

[0069] The various embodiments of this application have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or improvement of the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. An angle-adjustable microphone lifter, characterized in that, It includes a housing (1), a microphone (2), an elevation sensor (3), a rotator (4), and a lifting assembly (5); The top of the housing (1) is provided with an opening for the microphone (2) to enter and exit, and the elevation angler (3), rotator (4) and lifting assembly (5) are all located inside the housing (1); The elevation sensor (3) includes a base (30), a frame (31), a drive source (32), a transmission component (33), and an angle conversion component (34). The first end of the frame (31) is rotatably connected to the base (30) through a first rotating connector (35), and the second end is rotatably connected to the base (30) through a second rotating connector (36). The second end is provided with an extension (37) that passes through the base (30). The drive source (32) is located on the frame (31), and its output end is connected to the transmission component (33). The transmission component (33) passes through the extension (37) and is hinged to the angle conversion component (34). The angle conversion component (34) is rotatably connected to the extension (37) of the frame (31) through a third rotating connector (38). The microphone (2) is located on the angle conversion component (34). The rotator (4) drives the frame (31) to rotate around the first rotating connector (35), and the lifting assembly (5) drives the base (30) to rise and fall along the height direction of the shell (1); The third rotating connector (38) is a damping adjustment shaft.

2. The angle-adjustable microphone lifter according to claim 1, characterized in that, The rotator (4) includes a first motor (40), a first driving gear (41), and a first driven gear (42); The first motor (40) is located at the bottom of the base (30), and its output shaft passes through the base (30) and is connected to the first driving gear (41). The first driven gear (42) is sleeved on the first rotating connector (35). The first rotating connector (35) is a rotating shaft. The first driving gear (41) and the first driven gear (42) are connected by belt drive to drive the frame (31) to rotate.

3. The angle-adjustable microphone lifter according to claim 2, characterized in that, The rotator (4) also includes an angle limiting unit (43) for detecting the rotation angle of the frame (31) and limiting the rotation stroke of the frame (31).

4. The angle-adjustable microphone lifter according to claim 1, characterized in that, The base (30) includes a lifting plate (300), a connecting plate (301), and a support plate (302); The connecting plate (301) is horizontally positioned at the end of the lifting plate (300), and the support plate (302) is horizontally positioned at the top of the lifting plate (300). The lifting plate (300), the connecting plate (301), and the support plate (302) together form an installation space for accommodating the frame (31). The connecting plate (301) has a shaft hole through which the first rotating connector (35) passes. The support plate (302) is positioned on the bearing mounting position. The second rotating connector (36) is a bearing. The outer ring of the bearing is fixed to the bearing mounting position. The inner ring of the bearing is connected to the second end of the frame (31). The extension (37) passes through the bearing and extends out of the installation space.

5. The angle-adjustable microphone lifter according to claim 4, characterized in that, The lifting assembly (5) includes a lifting motor (50), a second driving gear (51), a second driven gear (52), and a mounting block (53). The lifting motor (50) is located inside the housing (1), and its output end is connected to the second driving gear (51). The second driven gear (52) is rotatably mounted on the mounting block (53). The mounting block (53) is located inside the housing (1). The second driving gear (51) and the second driven gear (52) are connected by a belt drive. The lifting plate (300) is fixedly connected to the belt. The housing (1) is provided with a guide rail, and the lifting plate (300) is provided with a slider that slides with the guide rail.

6. The angle-adjustable microphone lifter according to claim 4, characterized in that, The second end face of the frame (31) is provided with a limiting protrusion (310), and the support plate (302) is provided with an arc-shaped groove (3020) for the limiting protrusion (310) to be inserted. The central angle of the arc-shaped groove (3020) corresponds to the maximum rotation angle of the frame (31).

7. The angle-adjustable microphone lifter according to claim 1, characterized in that, The drive source (32) includes a second motor (320) and a transmission rack (321); The transmission rack (321) extends along the height direction of the frame (31), and one end of the transmission rack (321) is connected to the transmission component (33). The output end of the second motor (320) is provided with a drive gear, which meshes with the transmission rack (321).

8. The angle-adjustable microphone lifter according to claim 7, characterized in that, The frame (31) is also provided with a displacement detection unit (39) for detecting the displacement of the transmission rack (321) to limit the pitch angle range of the microphone (2).

9. The angle-adjustable microphone lifter according to claim 8, characterized in that, The transmission component (33) includes a pull rod (330) and a connecting rod (331). One end of the pull rod (330) is connected to a transmission rack (321), and the other end is hinged to the connecting rod (331). The connecting rod (331) is hinged to the angle conversion component (34). An elastic buffer (332) is sleeved on the outer periphery of the pull rod (330). One end of the elastic buffer (332) abuts against the transmission rack (321), and the other end abuts against the inner wall of the frame (31). The top end face of the housing (1) is also provided with a control panel (6), and the control panel (6) is provided with buttons.

10. A conference terminal, characterized in that, It includes a desktop and an angle-adjustable microphone lifter as described in any one of claims 1-9, the angle-adjustable microphone lifter being mounted on the desktop.

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