阅读说明：本技术 一种麦克风检测装置 (Microphone detection device ) 是由 陈浩 于 2021-09-13 设计创作，主要内容包括：本发明公开了一种麦克风检测装置,属于检测装置领域。一种麦克风检测装置,包括底座以及安装在底座上的箱体,箱体内壁设有多个固定式扬声器,箱体内设有移动板,移动板上固定连接有固定板,固定板上伸缩设置有移动式扬声器；箱体顶部内侧设有密封垫,以及,用于对麦克风接收的音频信号进行处理的分析仪；由于在箱体内安装固定式扬声器的同时,有设置了一个或多个移动式扬声器,从而将主测试音和噪音在两类的扬声器之间转换测试,从而能够全方位的对麦克风进行检测,在移动式扬声器运动的过程中能够使活塞将筒体内的气体输送至密封垫内,增强箱盖和箱体之间的密封,本发明可实现对麦克风多方位、多角度的检测,防止麦克风存在残次品而投放市场。(The invention discloses a microphone detection device, and belongs to the field of detection devices. A microphone detection device comprises a base and a box body arranged on the base, wherein a plurality of fixed loudspeakers are arranged on the inner wall of the box body; the inner side of the top of the box body is provided with a sealing gasket and an analyzer for processing the audio signal received by the microphone; the fixed loudspeaker is arranged in the box body, and the one or more movable loudspeakers are arranged, so that main test sound and noise are converted and tested between the two loudspeakers, the microphone can be detected in an all-dimensional mode, the piston can convey gas in the cylinder body into the sealing gasket in the moving process of the movable loudspeakers, and sealing between the box cover and the box body is enhanced.)

1. The microphone detection device is characterized by comprising a base (1) and a box body (2) arranged on the base (1), wherein the top of the box body (2) is rotatably connected with a box cover (202), the box body (2) is rotatably connected with a base station (204), and the base station (204) is provided with a clamping sleeve (205) for fixing a microphone;

the loudspeaker box is characterized in that a plurality of fixed loudspeakers (215) are arranged on the inner wall of the box body (2), a moving plate (208) is arranged in the box body (2), a fixed plate (209) is fixedly connected to the moving plate (208), and a movable loudspeaker (211) is arranged on the fixed plate (209) in a telescopic mode;

the movable plate (208) is driven to move in the box body (2), and a sealing gasket (221) is arranged on the inner side of the top of the box body (2); and an analyzer (3) for processing the audio signal received by the microphone.

2. The microphone detection device according to claim 1, wherein the driving portion includes a screw rod (206) mounted on an inner wall of the case (2), the screw rod (206) is rotatably disposed with the case (2), a driving source for driving the screw rod (206) to rotate is disposed outside the case (2), the moving plate (208) is threadedly connected with the screw rod (206), a fixed shaft (207) is disposed on the inner wall of the case (2), and the moving plate (208) is slidably connected with the fixed shaft (207).

3. The microphone detection device according to claim 2, wherein a first through groove is formed in the moving plate (208), a transverse plate (212) is connected to the inner wall of the box body (2), the transverse plate (212) penetrates through the first through groove, a scale area (213) and a reading area (214) are formed in the transverse plate (212), a second through groove (2081) which vertically penetrates through the first through groove is formed in the moving plate (208), and the reading area (214) is located under the second through groove (2081).

4. The microphone detecting device according to claim 2, wherein the sealing pad (221) has a side surface connected to the inner side wall of the housing (2), and a sealing cloth hermetically connected to both ends of the side surface to form a sealed space, the detecting device further comprises an inflating assembly disposed on the fixing plate (209), and the fixing plate (209) is moved to actuate the inflating assembly to inflate the sealing cloth.

5. The microphone detection device according to claim 4, wherein the inflation component comprises a cylinder (216) connected to the fixing plate (209), a vertical plate (222) is fixedly connected in the cylinder (216), the vertical plate (222) divides the cylinder (216) into two independent chambers, a piston (223) is arranged in each chamber in a sealing and sliding manner, a push rod (217) is arranged on the piston (223), a baffle plate (218) is fixedly connected to one end of the push rod (217) far away from the piston (223), a spring (219) with two ends respectively abutting against the baffle plate (218) and the cylinder (216) is sleeved on the push rod (217), an airtight channel (2091) communicated with the chambers is arranged on the fixing plate (209), a sealed pipeline (224) is connected on the fixing plate (209), and the sealed pipeline (224) is communicated with the airtight channel (2091), one end, far away from the fixing plate (209), of the sealing pipeline (224) is communicated with the sealing cloth, the two sides of the box body (2) are connected with extension barrels (220), and the baffle plates (218) can stretch into the extension barrels (220) and abut against the bottoms of the extension barrels (220).

6. The microphone detection device according to claim 2, wherein the driving source comprises a support plate (5) mounted on a side wall of the case (2), the support plate (5) is provided with a first motor (501), a speed reducer (502) is mounted on the side wall of the case (2), an output end of the speed reducer (502) is connected with the screw (206), and an output end of the first motor (501) is fixedly connected with an input end of the speed reducer (502).

7. The microphone detection device according to claim 2, wherein a box body (4) is fixedly connected to the bottom of the base (1), a second motor (401) is installed in the box body (4), a rotary disc (402) is fixedly connected to an output end of the second motor (401), a clamping rod (405) is fixedly connected to the rotary disc (402), a rotary shaft is fixedly connected to the bottom of the base station (204), the rotary shaft penetrates through the bottom of the box body (2) and is fixedly connected with a clamping disc (403), a plurality of clamping grooves (404) which are distributed circumferentially are formed in the clamping disc (403), and the clamping rod (405) is clamped into the clamping groove (404) to drive the clamping disc (403) to rotate.

8. The microphone detection device as recited in claim 1, wherein the case cover (202) is provided with a viewing window (203), and the viewing window (203) is formed by packaging multiple layers of glass with a gap between the multiple layers of glass.

9. The microphone detection device as claimed in claim 5, wherein a sealed barrel (2203) is installed on the outer wall of the extended barrel (220), a second piston (2207) is arranged in the sealed barrel (2203), a second push rod (2205) is fixedly connected to the second piston (2207), the second push rod (2205) penetrates through the outer wall of the extended barrel (220) and extends inwards, a second baffle (2204) abutting against the baffle (218) is arranged at the extended end of the second piston, the second baffle (2204) is slidably arranged in the extended barrel (220), a second spring (2206) with two ends abutting against the second baffle (2204) and the inner wall of the extended barrel (220) is sleeved on the second push rod (2205), a lubricating oil tank (2201) is connected to the outer wall of the box (2), a spraying plate (2208) is arranged on the inner wall of the box (2) and right above the screw rod (206), and an oil cover (2202) is arranged right below the screw rod (206), an oil outlet of the oil receiving cover (2202) is communicated with a lubricating oil tank (2201), an oil inlet end of the sealing barrel (2203) is communicated with the lubricating oil tank (2201), and an oil outlet end of the sealing barrel is communicated with an oil spraying plate (2208).

Technical Field

The invention relates to the technical field of detection devices, in particular to a microphone detection device.

Background

With the rapid development of the technologies of the existing intelligent products such as VR, AR and the like, the miniature microphone is developed to support the functions of noise reduction, sound source positioning, tracking and the like from a simple recording function; the microphone assembly is directly adhered and fixed on a structural member (irregular shell multi-curved surface and frosted thin-wall shell) with a sound hole of a product by physical design, so that the corresponding acoustic requirements are met. The common microphone assembly is fixed by adding glue (or back glue) and extruding, but deformation and glue overflow are easy to cause to block a sound hole, or the glue is uneven, and a gap and leakage exist on the pasting surface; finally, the acoustic performance of the intelligent product microphone can not meet the required requirement. The manufacturing process needs to ensure quality and improve the product through acoustic performance testing.

When the existing detection device detects a microphone in a sound-free box, the sound-free box is poor in sealing effect, and the positions of a loudspeaker and the microphone are not convenient to adjust, so that the microphone detection device is provided.

Disclosure of Invention

The invention aims to solve the problems that no sound box is sealed and how a sound receiving monitoring head and a microphone are adjusted in the prior art, and provides a microphone detection device.

In order to achieve the purpose, the invention adopts the following technical scheme:

a microphone detection device is characterized by comprising a base and a box body arranged on the base, wherein the top of the box body is rotatably connected with a box cover, the inside of the box body is rotatably connected with a base station, and the base station is provided with a clamping sleeve for fixing a microphone; the inner wall of the box body is provided with a plurality of fixed loudspeakers, a movable plate is arranged in the box body, a fixed plate is fixedly connected to the movable plate, and the movable loudspeakers are arranged on the fixed plate in a telescopic mode; the mobile plate is characterized by further comprising a driving part for driving the mobile plate to move in the box body, a sealing gasket is arranged on the inner side of the top of the box body, and an analyzer for processing audio signals received by the microphone is further included.

Preferably, the driving part comprises a screw rod installed on the inner wall of the box body, the screw rod and the box body are arranged in a rotating mode, the box body is externally provided with a driving source for driving the screw rod to rotate, the movable plate is in threaded connection with the screw rod, a fixed shaft is arranged on the inner wall of the box body, and the movable plate is in sliding connection with the fixed shaft.

Preferably, be equipped with first logical groove on the movable plate, the box inner wall is connected with the diaphragm, the diaphragm runs through first logical groove, be equipped with scale zone and reading district on the diaphragm, be equipped with on the movable plate with the second that first logical groove link up perpendicularly leads to the groove, the reading district is located under the second leads to the groove.

Preferably, the sealing gasket is provided with a side surface connected with the inner side wall of the box body and sealing cloth hermetically connected with two ends of the side surface to form a sealing space, the monitoring device further comprises an inflating assembly, the inflating assembly is arranged on the fixing plate, and the fixing plate moves to drive the inflating assembly to inflate the sealing cloth.

Preferably, the inflation assembly is including connecting the barrel on the fixed plate, fixedly connected with riser in the barrel, the riser will the barrel divide into two independent cavities, and every all sealed sliding sets up a piston in the cavity, is equipped with a push rod on the piston, the one end fixedly connected with baffle of piston is kept away from to the push rod, cup jointed the spring that both ends offset with baffle and barrel respectively on the push rod, be equipped with the airtight passageway with the cavity intercommunication on the fixed plate, be connected with sealed pipeline on the fixed plate, sealed pipeline with airtight passageway intercommunication, sealed pipeline keeps away from the one end of fixed plate with sealed cloth intercommunication, the box both sides all are connected with extends the bucket, the baffle can stretch into in the extension bucket with extend the barrel head portion and offset.

Preferably, the driving source comprises a support plate arranged on the side wall of the box body, a first motor is arranged on the support plate, a speed reducer is arranged on the side wall of the box body, the output end of the speed reducer is connected with the screw rod, and the output end of the first motor is fixedly connected with the input end of the speed reducer.

Preferably, base bottom fixedly connected with box body, install the second motor in the box body, the output fixedly connected with carousel of second motor, fixedly connected with kelly on the carousel, base station bottom fixedly connected with pivot, the pivot passes bottom half and fixedly connected with chuck, be equipped with a plurality of draw-in grooves that are the circumference and distribute on the chuck, the kelly card is gone into order about the chuck rotation in the draw-in groove.

Preferably, the box cover is provided with an observation window, the observation window is formed by packaging multiple layers of glass, and gaps are formed among the multiple layers of glass.

Preferably, the sealing barrel is installed on the outer wall of the extension barrel, a second piston is arranged in the sealing barrel, a second push rod is fixedly connected to the second piston, the second push rod penetrates through the outer wall of the extension barrel and extends inwards, a second baffle which is abutted to the baffle is arranged at the extension end of the second push rod, the second baffle is arranged in the extension barrel in a sliding mode, a second spring with two ends abutted to the second baffle and the inner wall of the extension barrel respectively is sleeved on the second push rod, a lubricating oil tank is connected to the outer wall of the box, an oil spraying plate is arranged on the inner wall of the box and located right above the screw rod, an oil receiving cover is arranged right below the screw rod, an oil outlet of the oil receiving cover is communicated with the lubricating oil tank, the oil inlet end of the sealing barrel is communicated with the lubricating oil tank, and the oil outlet end is communicated with the oil spraying plate.

Compared with the prior art, the invention provides a microphone detection device, which has the following beneficial effects:

the invention can realize multi-azimuth and multi-angle detection of the microphone and prevent the microphone from being put on the market due to the fact that the fixed loudspeaker is arranged in the box body and the one or more movable loudspeakers are arranged, so that main test sound and noise are converted and tested between the two loudspeakers, the microphone can be detected in all directions, the piston can convey gas in the cylinder body into the sealing gasket in the moving process of the movable loudspeakers, and the sealing between the box cover and the box body is enhanced.

Drawings

Fig. 1 is a schematic structural diagram of a microphone detection device according to the present invention;

fig. 2 is a schematic structural diagram of a microphone detection device according to the present invention;

fig. 3 is a schematic structural diagram of a microphone detection device according to a third embodiment of the present invention;

fig. 4 is a schematic structural diagram of a microphone detection device according to a fourth embodiment of the present invention;

fig. 5 is a schematic structural diagram of a microphone detection device according to a fifth embodiment of the present invention;

fig. 6 is a schematic structural diagram six of a microphone detection device according to the present invention;

fig. 7 is a schematic structural diagram of a portion a in fig. 2 of a microphone detection apparatus according to the present invention;

fig. 8 is a schematic structural diagram of a portion B in fig. 4 of a microphone detection apparatus according to the present invention;

fig. 9 is a schematic structural diagram of a portion C in fig. 5 of a microphone detecting device according to the present invention;

fig. 10 is a schematic partial structural diagram of a microphone detecting device according to the present invention shown in fig. 5;

fig. 11 is a schematic partial structural diagram of a microphone detection device according to the present invention;

fig. 12 is a schematic structural diagram of a portion E in fig. 11 of a microphone detection apparatus according to the present invention.

In the figure: 1. a base; 2. a box body; 202. a box cover; 203. an observation window; 204. a base station; 205. a card sleeve; 206. a screw; 207. a fixed shaft; 208. moving the plate; 2081. a second through groove; 209. a fixing plate; 2091. an air-tight seal channel; 210. a cylinder; 211. a mobile speaker; 212. a transverse plate; 213. a scale zone; 214. a reading area; 215. a stationary speaker; 216. a barrel; 217. a push rod; 218. a baffle plate; 219. a spring; 220. an extension barrel; 2201. a lubricating oil tank; 2202. an oil receiving cover; 2203. sealing the barrel; 2204. a second baffle; 2205. a second push rod; 2206. a second spring; 2207. a second piston; 2208. an oil spraying plate; 221. a gasket; 222. a vertical plate; 223. a piston; 224. sealing the pipeline; 2241. an air relief valve; 3. an analyzer; 4. a box body; 401. a second motor; 402. a turntable; 403. a chuck; 404. a card slot; 405. a clamping rod; 5. a support plate; 501. a first motor; 502. and a speed reducer.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

Referring to fig. 1-10, a microphone detection device is characterized by comprising a base 1 and a box body 2 arranged on the base 1, wherein the top of the box body 2 is rotatably connected with a box cover 202, the box body 2 is rotatably connected with a base station 204, and the base station 204 is provided with a clamping sleeve 205 for fixing a microphone; the inner wall of the box body 2 is provided with a plurality of fixed loudspeakers 215, a moving plate 208 is arranged in the box body 2, a fixed plate 209 is fixedly connected to the moving plate 208, and the fixed plate 209 can be connected with a movable loudspeaker 211 through a cylinder 210; the mobile phone also comprises a driving part for driving the moving plate 208 to move in the box body 2, a sealing gasket 221 is arranged on the inner side of the top of the box body 2, and an analyzer 3 for processing an audio signal received by the microphone.

Referring to fig. 1-4, fig. 7, a preferred embodiment of the present invention: the driving part comprises a screw 206 arranged on the inner wall of the box body 2, the screw 206 is rotatably arranged with the box body 2, a driving source for driving the screw 206 to rotate is arranged outside the box body 2, a moving plate 208 is in threaded connection with the screw 206, a fixed shaft 207 is arranged on the inner wall of the box body 2, and the moving plate 208 is in sliding connection with the fixed shaft 207.

Referring to fig. 3, a preferred embodiment of the present invention: the driving source comprises a support plate 5 arranged on the side wall of the box body 2, a first motor 501 is arranged on the support plate 5, a speed reducer 502 is arranged on the side wall of the box body 2, the output end of the speed reducer 502 is connected with the screw 206, and the output end of the first motor 501 is fixedly connected with the input end of the speed reducer 502.

Referring to fig. 6, a preferred embodiment of the present invention: base 1 bottom fixedly connected with box body 4 installs second motor 401 in the box body 4, and the output fixedly connected with carousel 402 of second motor 401, fixedly connected with kelly 405 on the carousel 402, and base station 204 bottom fixedly connected with pivot, box 2 bottom and fixedly connected with chuck 403 are passed in the pivot, are equipped with a plurality of draw-in grooves 404 that are the circumference and distribute on the chuck 403, and the kelly 405 card is gone into and orders about chuck 403 rotatory in the draw-in groove 404.

Referring to fig. 1 to 6, in order to facilitate observation of the inside of the case 2, an observation window 203 is provided on the case cover 202, and the observation window 203 is formed by sealing multiple glass layers with a gap therebetween.

The invention first opens the case cover 202, then takes the microphone and puts it into the case body 2, inserts the base part of the microphone into the cutting sleeve 205 on the base station 204, then the case cover 202 is closed, at this time, an audio signal is emitted through the plurality of fixed speakers 215 in the case body 2, at this time, the microphone can receive the omnidirectional stereo sound in the case body 2, at this time, the moving speaker 211 can emit noise, then the audio signal received by the microphone is displayed from the analyzer 3, or the mobile speaker 211 emits a main test tone, the fixed speaker 215 emits a noise, and the detected audio signal changes are observed in accordance with the adjustment of the distance of the mobile speaker 211, thereby judging the sound receiving effect of the microphone, it should be noted that the analyzer 3 can be an existing audio processing device, it can be composed of components such as a display screen, a host computer, a control panel and the like, and is mainly used for controlling the sound production and movement of the fixed loudspeaker 215 or the movable loudspeaker 211 in the box body 2;

specifically, in this embodiment, the movable speaker 211 may use the screw 206 to drive the movable plate 208 to move, so that the movable plate 208 drives the fixed plate 209 to move, thereby driving the movable speaker 211 to move, but this embodiment is not limited thereto, for example, the movable speaker 211 may also use a telescopic hydraulic cylinder or other moving driving components, as long as the technical solution capable of driving the movable speaker 211 to move is within the protection range of this application, taking the screw 206 as an example, by starting the first motor 501 on the sidewall of the box 2 and decelerating or changing the speed of the first motor through the speed reducer 502, thereby controlling the rotation of the screw 206, so as to realize the reciprocating movement of the movable plate 208, when the movable speaker 211 is close to the center of the box 2, the movable speaker 211 is closest to the microphone, thereby generating the largest main audio or noise power, in order to further determine how small the relative distance between the main audio or noise source and the microphone is, the microphone can receive corresponding signals, so that in the embodiment, the moving plate 208 is provided with the first through groove, the inner wall of the box body 2 is connected with the horizontal plate 212, the horizontal plate 212 penetrates through the first through groove, the horizontal plate 212 is provided with the scale area 213 and the reading area 214, the moving plate 208 is provided with the second through groove 2081 vertically penetrating through the first through groove, the reading area 214 is positioned right below the second through groove 2081, and along with the movement of the moving plate 208, the reading area 214 in the second through groove 2081 is correspondingly converted, so that the moving distance of the moving plate 208 can be visually seen;

in order to prevent the box body 2 from being affected by external noise, a sealing pad 221 is arranged at the joint of the box cover 202 and the box body 2, the sealing pad 221 is provided with a side surface connected with the inner side wall of the box body 2, and a sealing cloth hermetically connected with two ends of the side surface to form a sealed space, the monitoring device further comprises an inflating assembly, the inflating assembly is arranged on the fixing plate 209, and the fixing plate 209 moves to drive the inflating assembly to inflate the sealing cloth;

specifically, the inflation assembly includes a cylinder 216 connected to the fixed plate 209, a vertical plate 222 is fixedly connected in the cylinder 216, the vertical plate 222 divides the cylinder 216 into two independent chambers, a piston 223 is disposed in each chamber in a sealing and sliding manner, a push rod 217 is disposed on the piston 223, a baffle 218 is fixedly connected to one end of the push rod 217 away from the piston 223, a spring 219 having two ends respectively abutting against the baffle 218 and the cylinder 216 is sleeved on the push rod 217, an airtight channel 2091 communicated with the chambers is disposed on the fixed plate 209, a sealing pipeline 224 is connected to the fixed plate 209, the sealing pipeline 224 is communicated with the airtight channel 2091, one end of the sealing pipeline 224 away from the fixed plate 209 is communicated with a sealing cloth, extension barrels 220 are connected to two sides of the box 2, the baffle 218 can extend into the extension barrel 220 to abut against the bottom of the extension barrel 220 and can reciprocate along with the moving plate 208, thereby driving the cylinder 216 to move, as shown in fig. 5, for example, when the moving plate 208 moves rightward, the baffle 218 firstly abuts against the inner wall of the extending barrel 220, and then the push rod 217 drives the piston 223 to convey the air pressure in the chamber into the sealing pipeline 224 through the air sealing passage 2091, so as to inflate the sealing cloth, it should be noted that the cylinder 216 is provided with a first one-way valve, the air sealing passage 2091 is provided with a second one-way valve, the directions of the first one-way valve and the second one-way valve are opposite, so as to ensure that when the piston 223 resets under the action of the spring 219, the external air is extracted, the air in the chamber is conveyed to the sealing cloth by extrusion, the sealing pipeline 224 is connected with an air relief valve 2241, and accordingly, redundant air is exhausted.

In order to facilitate detection of multiple parts of the microphone, a base station 204 is connected in the box body 2 in a rotating mode, a clamping sleeve 205 used for fixing the microphone is arranged on the base station 204, a box body 4 is fixedly connected to the bottom of the base 1, a second motor 401 is installed in the box body 4, an output end of the second motor 401 is fixedly connected with a rotary table 402, a clamping rod 405 is fixedly connected to the rotary table 402, a rotary shaft is fixedly connected to the bottom of the base station 204 and penetrates through the bottom of the box body 2 and is fixedly connected with a clamping disc 403, a plurality of clamping grooves 404 distributed in the circumferential mode are formed in the clamping disc 403, the clamping rod 405 is clamped into the clamping groove 404 to drive the clamping disc 403 to rotate, the rotary table 402 is driven to rotate through the second motor 401, the clamping rod 405 is driven to be clamped into the clamping groove 404 in the clamping disc 403, rotation of the clamping disc 403 is achieved, rotation of the clamping disc 403 is driven through the rotary shaft base station 204 to rotate, and adjustment of the microphone is achieved.

Referring to fig. 11 to 12, in order to prevent the movable plate 208 from being worn seriously when being engaged with the screw 206, a sealing barrel 2203 is installed on an outer wall of the extension barrel 220, a second piston 2207 is disposed in the sealing barrel 2203, a second push rod 2205 is fixedly connected to the second piston 2207, the second push rod 2205 penetrates through the outer wall of the extension barrel 220 and extends inward, a second baffle 2204 abutting against the baffle 218 is disposed at an extending end of the second push rod 2204, the second baffle 2204 is slidably disposed in the extension barrel 220, a second spring 2206 having two ends respectively abutting against the second baffle 2204 and an inner wall of the extension barrel 220 is sleeved on the second push rod 2205, so as to drive the second baffle 2204 to move towards an opening of the extension barrel 220 in a natural state, a lubricating oil tank 2201 is connected to an outer wall of the box 2, an oil injection plate 2208 is disposed on an inner wall of the box 2 and directly above the screw 206, and an oil receiving cover 2202 is disposed directly below the screw 206, an oil outlet of the oil receiving cover 2202 is communicated with a lubricating oil tank 2201, an oil inlet end of a sealing barrel 2203 is communicated with the lubricating oil tank 2201, an oil outlet end is communicated with an oil injection plate 2208, therefore, when the baffle 218 abuts against the second baffle 2204 and pushes the second baffle 2204 to press against the bottom wall of the extension barrel 220, the second piston 2207 is synchronously pushed to move in the sealed barrel 2203 by the second push rod 2205, the second spring 2206 is reset, so that the purposes of oil absorption and oil injection can be realized, the sealing barrel 2203 is respectively communicated with the lubricating oil tank 2201 and the oil injection plate 2208 through a second sealing pipeline, and the corresponding one-way valve is arranged on the second sealing pipeline to realize the effects of oil absorption and oil injection, due to the fact that the function of oil injection on the screw 206 is added, the phenomenon that the tooth shape of the screw 206 is deformed to generate noise and the detection precision of the microphone is affected due to excessive abrasion caused when the moving plate 208 and the screw 206 detect large-scale microphone currents is avoided.

The invention can realize the multi-direction and multi-angle detection of the microphone and prevent the microphone from being damaged and put on the market because the fixed loudspeaker 215 is arranged in the box body 2 and one or more movable loudspeakers 211 are arranged, thus the main test sound and the noise are converted and tested between the two loudspeakers, thus the microphone can be detected in all directions, and the piston 223 can convey the gas in the cylinder body 216 into the sealing gasket 221 in the moving process of the movable loudspeakers 211 to enhance the sealing between the box cover 202 and the box body 2.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.