阅读说明：本技术 一种麦克风声学性能测试设备 (Microphone acoustic performance test equipment ) 是由 王勇 于 2021-06-29 设计创作，主要内容包括：本发明提供了一种麦克风声学性能测试设备,从下到上依次包括主壳体、产品承载台和压盖,所述主壳体内通过驱动调节机构上下滑动连接有喇叭,所述产品承载台上开设有待测产品放置槽,所述待测产品放置槽下方开设有声腔,所述声腔远离所述待测产品放置槽的一端为进音口,所述产品承载台上开设有麦克风容纳腔,所述声腔与所述麦克风容纳腔相通,所述麦克风容纳腔内滑动连接有麦克风。本发明能够解决现有声学性能测试设备测试误差较大的技术问题。(The invention provides a microphone acoustic performance testing device which sequentially comprises a main shell, a product bearing table and a gland from bottom to top, wherein a loudspeaker is connected in the main shell in a vertical sliding mode through a driving adjusting mechanism, a to-be-tested product placing groove is formed in the product bearing table, an acoustic cavity is formed below the to-be-tested product placing groove, one end, far away from the to-be-tested product placing groove, of the acoustic cavity is a sound inlet, a microphone accommodating cavity is formed in the product bearing table and communicated with the acoustic cavity, and a microphone is connected in the microphone accommodating cavity in a sliding mode. The invention can solve the technical problem of larger test error of the existing acoustic performance test equipment.)

1. The utility model provides a microphone acoustic performance test equipment, its characterized in that, from the bottom up includes main casing body (1), product plummer (2) and gland (3) in proper order, sliding connection has loudspeaker (4) from top to bottom through drive adjustment mechanism (5) in main casing body (1), the product standing groove (200) of awaiting measuring has been seted up on product plummer (2), sound chamber (201) have been seted up to the product standing groove (200) below of awaiting measuring, sound chamber (201) are kept away from the one end of the product standing groove (200) of awaiting measuring is sound inlet (2030), it holds chamber (202) to have seted up the microphone on product plummer (2), sound chamber (201) with the microphone holds chamber (202) and communicates with each other, microphone holds chamber (202) sliding connection has microphone (203).

2. The microphone acoustic performance test apparatus of claim 1,

be equipped with cyclic annular seal recess (301) on gland (3), product plummer (2) be equipped with cyclic annular seal protruding (302) that cyclic annular seal recess (301) mutually supported, gland (3) go up the sliding connection have a plurality of compressing tightly needles (300) of evenly arranging.

3. The microphone acoustic performance test apparatus of claim 1,

be close to in main casing body (1) sound inlet (2030) department is equipped with first seal (100), loudspeaker holding tank (101) have been seted up on first seal (100), loudspeaker holding tank (101) include loudspeaker main part holding tank (102) and loudspeaker plummer holding tank (103).

4. The microphone acoustic performance test apparatus of claim 1,

and a second sealing body (2020) is arranged in the microphone accommodating cavity (202), and the second sealing body (2020) is used for sealing the sound cavity (201).

5. The microphone acoustic performance test apparatus of claim 1,

the driving adjusting mechanism (5) comprises two symmetrically arranged lead screws (500), a lead screw nut (501) is in threaded connection with each lead screw (500), a horn bearing table (502) is sleeved outside each lead screw nut (501), the horn bearing table (502) is fixedly connected with the horn (4), a first gear (5036) and a second gear (5037) are respectively in key connection with each lead screw (500), a sliding groove (503) is arranged at the bottom of the inner wall of the main shell (1), a first sliding block (5030) and a second sliding block (5031) are in sliding connection with each sliding groove (503), a first connecting rod (5032) and a second connecting rod (5033) are respectively in hinged connection with each other on each first sliding block (5030) and each second sliding block (5031), the first connecting rod (5032) and the second connecting rod (5033) are arranged in a crossed manner, the middle portions of the first connecting rod (5032) and the second connecting rod (5033) are hinged with each other far away from the first sliding block (5030) and the first sliding block (5031) The end of the first sliding block (5030) is hinged to a second sliding block (5031) and is provided with a first driving piece, the end of the first sliding block (5030) is hinged to a second sliding block (5035), the first sliding block (5035) is hinged to a second sliding block (5035) and is meshed with a first gear (5037) and a second gear (5036), the inner side wall of the main shell (1) is fixedly connected with two guide cylinders (5038) which are symmetrically arranged, one end, away from the first connecting rod (5032) and the second connecting rod (5033), of the first sliding block (5034) and the second sliding block (5035) is sleeved in the guide cylinders (5038), the bottom of the guide cylinders (5038) is provided with a first buffer piece (5039), and the first sliding block (5030) and the second sliding block (5031) are provided with a first driving piece which is used for driving the first sliding block (5030) and the second sliding block (5031) to slide along the sliding groove (503).

6. The microphone acoustic performance test apparatus of claim 1,

two symmetrically arranged mounting holes (504) are formed in the main shell (1), a pressing device (505) is connected in the mounting holes (504) in a sliding mode, the pressing device (505) comprises a T-shaped pressing rod (5050), the T-shaped pressing rod (5050) comprises a pressing rod main body (5051) and a rod head (5052), a pressing sliding groove (5053) is formed in the pressing rod main body (5051), a pressing sliding block (5054) is connected in the pressing sliding groove (5053) in a sliding mode, a second driving piece is arranged on the pressing sliding block (5054) and used for driving the pressing sliding block (5054) to move along the pressing sliding groove (5053), a first pressing connecting rod (5055) is hinged to the pressing sliding block (5054), a second pressing connecting rod (5056) is hinged to one end, far away from the rod head (5052), of the pressing rod main body (5051), of the first pressing connecting rod (5055) far away from one end of the pressing sliding block (5054) and the second pressing connecting rod (5056) far away from the pressing connecting rod (5056) One end of the pressing rod main body (5051) is hinged, the rod head (5052) is hinged with an adjusting connecting rod (5056), the outer side wall of the main shell (1) is provided with two symmetrically arranged adjusting sliding rails (5057), the adjusting sliding rails (5057) are connected with adjusting sliding blocks (5058) in a sliding mode, and the adjusting sliding blocks (5058) are hinged with the adjusting connecting rod (5056).

7. The microphone acoustic performance test apparatus of claim 1,

a microphone driving mechanism (6) is arranged in the product bearing table (2), the microphone driving mechanism (6) comprises a power main part (601) and a first driving mechanism (602), a driving mechanism installation cavity (600) is arranged in the product bearing table (2), the power main part (601) is installed in the driving mechanism installation cavity (600), the power main part (601) is used for driving the first driving mechanism (602), the power main part (601) comprises a driving motor (6010), an output shaft of the driving motor (6010) is in key connection with a driving main shaft (6011), the driving main shaft (6011) is in key connection with a second bevel gear (6013), and the second bevel gear (6013) and the first driving mechanism (602) are meshed with each other and used for driving the first driving mechanism (602) to work;

the first driving mechanism (602) comprises an auxiliary shaft (6020), the auxiliary shaft (6020) is rotatably connected in the driving mechanism mounting cavity (600) and is perpendicular to the axis of the driving main shaft (6011), a third bevel gear (6025) is keyed on the auxiliary shaft (6020), the third bevel gear (6025) is meshed with the second bevel gear (6013), a first microphone driving connecting rod (6021) is hinged on the auxiliary shaft (6020), a second microphone driving connecting rod (6022) is hinged on the end of the first microphone driving connecting rod (6021) far away from the auxiliary shaft (6020), a hinge short rod (6023) is hinged on the end of the second microphone driving connecting rod (6022) far away from the first microphone driving connecting rod (6021), and the end of the hinge short rod (6023) far away from the second microphone driving connecting rod (6022) is fixedly connected with the microphone (203), the product bearing table (2) is provided with a transverse guide groove (6024), and the hinge short rod (6023) is connected in the transverse guide groove (6024) in a sliding way.

8. A microphone acoustic performance testing device according to claim 7,

the microphone driving mechanism (6) further comprises a second driving mechanism (603), the power main part (601) is used for driving the second driving mechanism (603) to work, a first bevel gear (6012) is connected to the driving main shaft (6011) in a key mode, and the first bevel gear (6012) is meshed with the second driving mechanism (603) to drive the second driving mechanism (603) to work;

the second driving mechanism (603) comprises a rotating shaft (6030), the rotating shaft (6030) is rotatably connected in the driving mechanism installation cavity (600), the axis of the rotating shaft is perpendicular to the driving main shaft (6011), the rotating shaft (6030) is in keyed connection with a third bevel gear (6031) and an adjusting gear (6032), the third bevel gear (6031) can be meshed with the first bevel gear (6012), a meshing adjusting chute (6033) is arranged on the rotating shaft (6030), the third bevel gear (6031) is in keyed connection with the third bevel gear (6031) through a sliding key, a third driving piece is arranged on the sliding key and used for driving the sliding key to move along the meshing adjusting chute (6033), a rack guide groove (6034) is arranged in the product bearing platform (2), an L-shaped adjusting rack (6035) is slidably connected in the rack guide groove (6034), the adjusting gear (6032) is meshed with the L-shaped adjusting rack (6035), the L-shaped adjusting rack (6035) is located on a first hinge block (6036) fixedly connected with one end in the microphone accommodating cavity (202), a second hinge block (6037) fixedly connected with the end in the microphone accommodating cavity (202), the microphone (203) is far away from a fourth hinge block (604) fixedly connected with one end of the sound cavity (201), a hinge block sliding groove (6039) is formed in the end of the microphone (203) far away from the sound cavity (201), a third hinge block (6038) is connected in the hinge block sliding groove (6039) in a sliding manner, a first hinge connecting rod (6040) is hinged between the first hinge block (6036) and the fourth hinge block (604), and a second hinge connecting rod (6041) is hinged between the third hinge block (6038) and the second hinge block (6037), the first hinge link (6040) and the second hinge link (6041) are arranged to cross each other, and are connected by a middle hinge.

Technical Field

The invention relates to the technical field of acoustic testing, in particular to microphone acoustic performance testing equipment.

Background

Along with the improvement of the living standard of consumers, the requirements on the sound quality of electronic products are more and more strict, when the acoustic performance of the electronic products is tested, the requirements on the testing environment are very strict, particularly the requirements on the sealing performance of the testing environment are very strict, the good and bad sealing performance of the acoustic performance of the testing environment is directly related to the measuring accuracy, so that the selection or establishment of a testing environment meeting the requirements is an important problem for the acoustic performance test of the electronic products;

the prior art CN105722003A patent document discloses a MEMS microphone testing mechanism, which includes a testing acoustic cavity, a product testing base and a testing needle seat, and the mechanism can test the acoustic performance of the microphone to be tested, but because the loudspeaker and the microphone are both far away from the second acoustic cavity, the volume of the cavity in the testing environment is large, so that the sound emitted by the loudspeaker is more susceptible to the external environment in the transmission process (such as external sound wave signal interference, the longer the sound signal transmission path is, the larger the interference is), and the error of the testing result is increased.

Disclosure of Invention

The invention provides a microphone acoustic performance testing device, which is used for solving the technical problems in the background technology.

In order to solve the technical problem, the invention discloses microphone acoustic performance testing equipment which sequentially comprises a main shell, a product bearing table and a gland from bottom to top, wherein a loudspeaker is connected in the main shell in a vertical sliding mode through a driving adjusting mechanism, a product placing groove to be tested is formed in the product bearing table, an acoustic cavity is formed below the product placing groove to be tested, one end, far away from the product placing groove to be tested, of the acoustic cavity is a sound inlet, a microphone accommodating cavity is formed in the product bearing table and communicated with the acoustic cavity, and a microphone is connected in the microphone accommodating cavity in a sliding mode.

Preferably, the gland is provided with an annular sealing groove, the product bearing table is provided with an annular sealing bulge matched with the annular sealing groove, and the gland is vertically and slidably connected with a plurality of uniformly arranged pressing needles.

Preferably, be close to in the main casing body sound inlet department is equipped with first seal, the loudspeaker holding tank has been seted up on the first seal, the loudspeaker holding tank includes loudspeaker main part holding tank and loudspeaker plummer holding tank.

Preferably, a second sealing body is arranged in the microphone accommodating cavity and used for sealing the sound cavity.

Preferably, the driving adjustment mechanism includes two symmetrically arranged lead screws, a lead screw nut is in threaded connection with each lead screw, a horn bearing table is sleeved outside each lead screw nut, the horn is fixedly connected to each horn bearing table, a first gear and a second gear are respectively in key connection with each lead screw, a sliding groove is arranged at the bottom of the inner wall of the main housing, a first sliding block and a second sliding block are in sliding connection with each sliding groove, a first connecting rod and a second connecting rod are respectively in hinged connection with each first sliding block and the second sliding block, the first connecting rod and the second connecting rod are arranged in a crossed manner, the middle portions of the first connecting rod and the second connecting rod are hinged to each other, one ends of the first connecting rod and the second connecting rod, which are far away from the first sliding block and the second sliding block, are respectively in hinged connection with a first rack and a second rack, and the first rack and the second rack are respectively in mutual engagement with the second gear and the first gear, the main casing inside wall fixedly connected with two symmetrical arrangement's guide cylinder, first rack with the second rack is kept away from first connecting rod with a pot head of second connecting rod is established in the guide cylinder, the guide cylinder bottom is equipped with first bolster, first slider with be equipped with first driving piece on the second slider, first driving piece is used for the drive first slider with the second slider is followed the spout slides.

Preferably, two symmetrically arranged mounting holes are formed in the main shell, a pressing device is slidably connected in the mounting holes and comprises a T-shaped pressing rod, the T-shaped pressing rod comprises a pressing rod main body and a rod head, a pressing chute is formed in the pressing rod main body, a pressing slider is slidably connected in the pressing chute, a second driving piece is arranged on the pressing slider and used for driving the pressing slider to move along the pressing chute, a first pressing connecting rod is hinged on the pressing slider, one end, far away from the rod head, of the pressing rod main body is hinged on a second pressing connecting rod, one end, far away from the pressing slider, of the first pressing connecting rod is hinged on one end, far away from the pressing slider, of the second pressing connecting rod, an adjusting connecting rod is hinged on the rod head, and two symmetrically arranged adjusting slide rails are arranged on the outer side wall of the main shell, the adjusting slide rail is connected with an adjusting slide block in a sliding mode, and the adjusting slide block is connected with the adjusting connecting rod in a hinged mode.

Preferably, a microphone driving mechanism is arranged in the product bearing table and comprises a power main part and a first driving mechanism, a driving mechanism installation cavity is arranged in the product bearing table, the power main part is installed in the driving mechanism installation cavity and is used for driving the first driving mechanism, the power main part comprises a driving motor, an output shaft of the driving motor is in keyed connection with a driving main shaft, a key on the driving main shaft is in keyed connection with a second bevel gear, and the second bevel gear is meshed with the first driving mechanism and is used for driving the first driving mechanism to work;

the first driving mechanism comprises an auxiliary shaft, the auxiliary shaft is rotatably connected in the driving mechanism mounting cavity and is perpendicular to the axis of the driving main shaft, a third bevel gear is connected to the auxiliary shaft in a key mode, the third bevel gear is meshed with the second bevel gear, a first microphone driving connecting rod is hinged to the auxiliary shaft, one end, away from the auxiliary shaft, of the first microphone driving connecting rod is hinged to a second microphone driving connecting rod, one end, away from the first microphone driving connecting rod, of the second microphone driving connecting rod is hinged to a hinge short rod, one end, away from the second microphone driving connecting rod, of the hinge short rod is fixedly connected with the microphone, a transverse guide groove is formed in the product bearing platform, and the hinge short rod is connected in the transverse guide groove in a sliding mode.

Preferably, the microphone driving mechanism further comprises a second driving mechanism, the power main part is used for driving the second driving mechanism to work, a first bevel gear is connected to the driving spindle in a key mode, and the first bevel gear and the second driving mechanism are meshed with each other and used for driving the second driving mechanism to work;

the second driving mechanism comprises a rotating shaft, the rotating shaft is rotatably connected in the driving mechanism mounting cavity, the axis of the rotating shaft is perpendicular to the driving main shaft, a third bevel gear and an adjusting gear are connected to the rotating shaft in a key mode, the third bevel gear can be meshed with the first bevel gear, a meshing adjusting chute is formed in the rotating shaft, the third bevel gear is connected with the third bevel gear in a key mode through a sliding key, a third driving piece is arranged on the sliding key and used for driving the sliding key to move along the meshing adjusting chute, a rack guide groove is formed in the product bearing platform, an L-shaped adjusting rack is slidably connected in the rack guide groove, the adjusting gear is meshed with the L-shaped adjusting rack, one end, located in the microphone accommodating cavity, of the L-shaped adjusting rack is fixedly connected with a first hinge block, and a second hinge block is fixedly connected in the microphone accommodating cavity, the microphone is far away from one end part of the sound cavity and is fixedly connected with a fourth hinge block, a hinge block sliding groove is formed in one end part of the microphone far away from the sound cavity, a third hinge block is connected in the hinge block sliding groove in a sliding mode, a first hinge connecting rod is connected between the first hinge block and the fourth hinge block in a hinged mode, a second hinge connecting rod is connected between the third hinge block and the second hinge block in a hinged mode, and the first hinge connecting rod and the second hinge connecting rod are arranged in a crossed mode and connected through a hinge in the middle.

The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

fig. 1 is a schematic view of the overall structure of the present invention.

FIG. 2 is an enlarged view A of a portion of FIG. 1 according to the present invention.

Fig. 3 is a schematic structural diagram of the pressing device of the present invention.

FIG. 4 is an enlarged view B of the portion of FIG. 1 according to the present invention.

In the figure: 1. a main housing; 100. a first sealing body; 101. a horn accommodating groove; 102. a horn main body accommodating groove; 103. a horn bearing platform accommodating groove; 2. a product bearing table; 200. a placing groove for a product to be tested; 201. an acoustic cavity; 202. a microphone receiving cavity; 2020. a second sealing body; 203. a microphone; 2030. a sound inlet; 3. a gland; 300. a pressing pin; 301. an annular seal groove; 302. an annular sealing protrusion; 4. a horn; 5. a drive adjustment mechanism; 500. a lead screw; 501. a lead screw nut; 502. a horn bearing platform; 503. a chute; 5030. a first slider; 5031. a second slider; 5032. a first link; 5033. a second link; 5034. a first rack; 5035. a second rack; 5036. a first gear; 5037. a second gear; 5038. a guide cylinder; 5039. a first buffer member; 504. mounting holes; 505. a pressing device; 5050. a T-shaped compression bar; 5051. a compression lever body; 5052. a club head; 5053. a compacting chute; 5054. pressing the sliding block; 5055. a first hold-down link; 5056. adjusting the connecting rod; 5057. adjusting the slide rail; 5058. adjusting the sliding block; 6. a microphone driving mechanism; 600. the driving mechanism mounting cavity; 601. a power master; 6010. a drive motor; 6011. driving the main shaft; 6012. a first bevel gear; 6013. a second bevel gear; 602. a first drive mechanism; 6020. an auxiliary shaft; 6021. a first microphone drive link; 6022. a second microphone drive link; 6023. a short hinge rod; 6024. a transverse guide groove; 6025. a third bevel gear; 603. a second drive mechanism; 6030. a rotating shaft; 6031. a third bevel gear; 6032. an adjusting gear; 6033. engaging the regulating chute; 6034. a rack guide groove; 6035. an L-shaped adjusting rack; 6036. a first hinge block; 6037. a second hinge block; 6038. a third hinge block; 6039. a hinge block chute; 604. a fourth hinge block; 6040. a first hinge link; 6041. a second hinge link.

Detailed Description

The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.

In addition, the descriptions related to the first, the second, etc. in the present invention are only used for description purposes, do not particularly refer to an order or sequence, and do not limit the present invention, but only distinguish components or operations described in the same technical terms, and are not understood to indicate or imply relative importance or implicitly indicate the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions and technical features between various embodiments can be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not be within the protection scope of the present invention.

The present invention provides the following examples:

example 1

The embodiment of the invention provides microphone acoustic performance testing equipment, which comprises a main shell 1, a product bearing table 2 and a gland 3 from bottom to top in sequence as shown in fig. 1-4, wherein a loudspeaker 4 is connected in the main shell 1 in a vertical sliding mode through a driving adjusting mechanism 5, a to-be-tested product placing groove 200 is formed in the product bearing table 2, an acoustic cavity 201 is formed below the to-be-tested product placing groove 200, a sound inlet 2030 is formed in one end, away from the to-be-tested product placing groove 200, of the acoustic cavity 201, a microphone accommodating cavity 202 is formed in the product bearing table 2, the acoustic cavity 201 is communicated with the microphone accommodating cavity 202, and a microphone 203 is connected in the microphone accommodating cavity 202 in a sliding mode.

The working principle and the beneficial effects of the technical scheme are as follows: when in use, a product to be tested (which may be a microphone to be tested) is placed on the product placing groove 200 to be tested, then the pressing cover 3 is covered on the product bearing table 2, so that the product to be tested is pressed, then the driving adjustment mechanism 5 drives the loudspeaker 4 to move upwards, so that the sound-making end of the loudspeaker 4 penetrates through the sound inlet 2030 and enters the sound cavity 201, then the microphone 203 slides in the microphone accommodating cavity 202, so that the end of the microphone 203 is located in the sound cavity 201, the loudspeaker 4 sounds, the microphone 203 and the product to be tested simultaneously test the sound in the sound cavity 201, and finally, the signal obtained by testing the product to be tested is subtracted from the signal obtained by testing the microphone 203 through the audio processing software, so as to obtain the acoustic performance of the product to be tested (specifically, refer to a microphone testing method of the prior art CN 104640055A), the design of the driving adjustment mechanism 5 of the present invention can adjust the position of the speaker 4 to shorten the distance between the speaker 4 and the acoustic cavity 201, and the shortened distance makes the volume of the cavity in the test environment smaller (i.e. the volume of the acoustic cavity 201 is reduced) compared with the larger volume of the cavity in the test environment in CN105722003A, so as to reduce the interference of the external environment (such as the interference of external sound wave signals, the longer the sound signal propagation path is, the larger the interference is), and reduce the error of the test result, and meanwhile, the microphone 203 is installed on the product bearing table 2 to reduce the distance between the microphone 203 and the acoustic cavity 201, reduce the test error, and solve the technical problem proposed in the background art.

Example 2

On the basis of the embodiment 1, the gland 3 is provided with an annular sealing groove 301, the product bearing table 2 is provided with an annular sealing bulge 302 matched with the annular sealing groove 301, and the gland 3 is connected with a plurality of pressing pins 300 which are uniformly arranged in an up-and-down sliding manner;

a first sealing body 100 is arranged in the main housing 1 near the sound inlet 2030, a horn receiving groove 101 is formed in the first sealing body 100, and the horn receiving groove 101 includes a horn main body receiving groove 102 and a horn plummer receiving groove 103;

a second sealing body 2020 is arranged in the microphone accommodating cavity 202, and the second sealing body 2020 is used for sealing the acoustic cavity 201.

The working principle and the beneficial effects of the technical scheme are as follows: annular seal recess 301 with mutually supporting of annular seal arch 302 has guaranteed the leakproofness of sound chamber 201, the design that compresses tightly needle 300 has guaranteed the product that awaits measuring with the contact tightness between the sound chamber 201 has guaranteed the leakproofness of sound chamber 201, the design of first seal 100 has reduced sound wave in the main casing body 1 is right the interference of sound in the sound chamber 201 for the test result is more accurate, loudspeaker main part holding tank 102 with loudspeaker plummer holding tank 103 makes loudspeaker 4 with the contact between the sound chamber 201 is more reliable, makes sound chamber 201 leakproofness is better, the design of second seal 2020 has been guaranteed the microphone hold chamber 202 with the leakproofness of sound chamber 201 each other for the test result is more accurate.

Example 3

On the basis of embodiment 1 or 2, the driving adjustment mechanism 5 includes two symmetrically arranged lead screws 500, a lead screw nut 501 is connected to the lead screw 500 through a screw thread, a horn bearing platform 502 is sleeved outside the lead screw nut 501, the horn bearing platform 502 is fixedly connected with the horn 4, a first gear 5036 and a second gear 5037 are respectively connected to the two lead screws 500 through keys, a sliding groove 503 is arranged at the bottom of the inner wall of the main housing 1, a first sliding block 5030 and a second sliding block 5031 are connected in the sliding groove 503 in a sliding manner, a first connecting rod 5032 and a second connecting rod 5033 are respectively connected to the first sliding block 5030 and the second sliding block 5031 through hinges, the first connecting rod 5032 and the second connecting rod 5033 are arranged in a crossing manner, and the middle portions are hinged to each other, one ends of the first connecting rod 5032 and the second connecting rod 5033, which are far away from the first sliding block 5030 and the second sliding block 5031, are respectively connected to a first rack 5034 and a second rack 5035 through hinges, the first rack 5034 and the second rack 5035 are respectively engaged with the second gear 5037 and the first gear 5036, two symmetrically arranged guide cylinders 5038 are fixedly connected to the inner side wall of the main housing 1, one ends of the first rack 5034 and the second rack 5035, which are far away from the first connecting rod 5032 and the second connecting rod 5033, are sleeved in the guide cylinders 5038, a first buffer 5039 is arranged at the bottom of the guide cylinders 5038, and first driving parts are arranged on the first sliding block 5030 and the second sliding block 5031 and used for driving the first sliding block 5030 and the second sliding block 5031 to slide along the sliding groove 503;

two symmetrically arranged mounting holes 504 are formed in the main housing 1, a compression device 505 is slidably connected in the mounting holes 504, the compression device 505 includes a T-shaped compression bar 5050, the T-shaped compression bar 5050 includes a compression bar main body 5051 and a rod head 5052, a compression chute 5053 is formed in the compression bar main body 5051, a compression slider 5054 is slidably connected in the compression chute 5053, a second driving member is arranged on the compression slider 5054 and is used for driving the compression slider 5054 to move along the compression chute 5053, a first compression link 5055 is hinged to the compression slider 5054, a second compression link 5056 is hinged to one end of the compression bar main body 5051 far away from the rod head 5052, one end of the first compression link 5055 far away from the compression slider 5054 is hinged to one end of the second compression link 5056 far away from the compression bar main body 5051, the rod head 5052 is hinged with an adjusting connecting rod 5056, the outer side wall of the main shell 1 is provided with two symmetrically arranged adjusting sliding rails 5057, the adjusting sliding rails 5057 are connected with an adjusting sliding block 5058 in a sliding mode, and the adjusting sliding block 5058 is hinged with the adjusting connecting rod 5056.

The working principle and the beneficial effects of the technical scheme are as follows: when the loudspeaker bearing platform is used, the loudspeaker 4 is upwards adjusted through the driving adjusting mechanism 5, so that the end part of the loudspeaker 4 is positioned in the sound cavity 201, the loudspeaker bearing platform accommodating groove 103 is matched with the loudspeaker bearing platform 502 at the moment, and then the pressing device 505 presses the loudspeaker bearing platform 502 to ensure the sealing property between the loudspeaker bearing platform and the sound cavity 201;

when the driving adjustment mechanism 5 works, the first driving member drives the first slider 5030 and the second slider 5031 to slide along the sliding slot 503, the first slider 5030 and the second slider 5031 slide along the sliding slot 503, under the action of the first link 5032 and the second link 5033, the first rack 5034 and the second rack 5035 are driven to move axially along the two guide cylinders 5038, respectively, the first rack 5034 and the second rack 5035 move to drive the second gear 5037 and the first gear 5036 to rotate, the second gear 5037 and the first gear 5036 rotate to drive the lead screw 500 to rotate, the lead screw 500 rotates to drive the lead screw nut 501 to move upward, the lead screw nut 501 moves upward to drive the horn bearing platform 502 to move upward, the horn bearing platform 502 moves upward to drive the end of the horn 4 to enter the acoustic cavity 201, at this time, the horn bearing platform accommodating groove 103 and the horn bearing platform 502 are matched with each other, the compressing device 505 compresses the horn bearing platform 502, a user manually pushes the adjusting slider 5058, the adjusting slider 5058 drives the adjusting link 5056 to enable the first compressing link 5055 to move towards the center of the main housing 1, when the compressing chute 5053 is located below the horn bearing platform 502, the adjusting slider 5058 stops being pushed, then the second driving piece drives the compressing slider 5054 to move along the compressing chute 5053, the compressing slider 5054 moves along the compressing chute 5053 to drive the first compressing link 5055 to rotate, the hinge of the first compressing link 5055 and the second compressing link 5056 abuts against the lower surface of the horn bearing platform 502, and the sealing performance of the acoustic cavity 201 is ensured.

Example 4

On the basis of embodiment 1, a microphone driving mechanism 6 is arranged in the product bearing table 2, the microphone driving mechanism 6 includes a power main part 601 and a first driving mechanism 602, a driving mechanism installation cavity 600 is arranged in the product bearing table 2, the power main part 601 is installed in the driving mechanism installation cavity 600, the power main part 601 is used for driving the first driving mechanism 602, the power main part 601 includes a driving motor 6010, an output shaft of the driving motor 6010 is in key connection with a driving main shaft 6011, the driving main shaft 6011 is in key connection with a second bevel gear 6013, and the second bevel gear 6013 is engaged with the first driving mechanism 602 to drive the first driving mechanism 602 to operate;

the first drive mechanism 602 includes an auxiliary shaft 6020, the auxiliary shaft 6020 rotatably coupled within the drive mechanism mounting cavity 600, and is mutually perpendicular to the axial line of the driving main shaft 6011, a third bevel gear 6025 is keyed on the auxiliary shaft 6020, the third bevel gear 6025 is engaged with the second bevel gear 6013, a first microphone driving link 6021 is hinged to the auxiliary shaft 6020, a second microphone drive link 6022 is hingedly coupled to an end of the first microphone drive link 6021 remote from the auxiliary shaft 6020, a hinge stub 6023 is hingedly attached to the end of the second microphone drive link 6022 remote from the first microphone drive link 6021, the end of the hinge stub 6023 remote from the second microphone drive link 6022 is fixedly coupled to the microphone 203, a transverse guide groove 6024 is arranged on the product bearing platform 2, and the hinge short rod 6023 is connected in the transverse guide groove 6024 in a sliding way;

the microphone driving mechanism 6 further comprises a second driving mechanism 603, the power main part 601 is used for driving the second driving mechanism 603 to work, a first bevel gear 6012 is keyed on the driving main shaft 6011, and the first bevel gear 6012 is engaged with the second driving mechanism 603 to drive the second driving mechanism 603 to work;

the second driving mechanism 603 includes a rotating shaft 6030, the rotating shaft 6030 is rotatably connected in the driving mechanism installation cavity 600, and the axis and the driving spindle 6011 mutually perpendicular, the rotating shaft 6030 is keyed joint with a third bevel gear 6031 and an adjusting gear 6032, the third bevel gear 6031 can be engaged with the first bevel gear 6012 mutually, the rotating shaft 6030 is provided with an engagement adjusting sliding chute 6033, the third bevel gear 6031 is connected with the third bevel gear 6031 through a sliding key, the sliding key is provided with a third driving part, the third driving part is used for driving the sliding key to move along the engagement adjusting sliding chute 6033, the product bearing platform 2 is provided with a rack guide groove 6034, the rack guide groove 6034 is internally slidably connected with an L-shaped adjusting rack 6035, the adjusting gear 6032 is engaged with the L-shaped adjusting rack 6035 mutually, the L-shaped adjusting rack 6035 is located at one end fixedly connected with a first hinge block 6036 in the microphone accommodating cavity 202, the microphone holds the interior fixedly connected with second hinge block 6037 of chamber 202, microphone 203 is kept away from the one end tip fixedly connected with fourth hinge block 604 of acoustic cavity 201, microphone 203 is kept away from hinge block spout 6039 has been seted up to the one end tip of acoustic cavity 201, sliding connection has third hinge block 6038 in hinge block spout 6039, first hinge block 6036 with hinged connection has first hinge connecting rod 6040 between the fourth hinge block 604, third hinge block 6038 with hinged connection has second hinge connecting rod 6041 between the second hinge block 6037, first hinge connecting rod 6040 with second hinge connecting rod 6041 intercrossing arranges, and middle part hinged connection.

The working principle and the beneficial effects of the technical scheme are as follows: when the microphone 203 needs to extend into the acoustic cavity 201, the driving motor 6010 drives the driving spindle 6011 to rotate, the driving spindle 6011 rotates to drive the first bevel gear 6012 and the second bevel gear 6013 to rotate, the first bevel gear 6012 rotates to drive the second driving mechanism 603 to drive the microphone 203 to extend, and the second bevel gear 6013 rotates to drive the first driving mechanism 602 to drive the microphone 203 to extend;

when the first driving mechanism 602 is operated, the second bevel gear 6013 rotates to drive the auxiliary shaft 6020 to rotate, the auxiliary shaft 6020 rotates to drive the first microphone driving link 6021 to rotate, the first microphone driving link 6021 rotates to drive the second microphone driving link 6022 to rotate, the second microphone driving link 6022 rotates to drive the hinge short rod 6023 to move along the transverse guiding groove 6024, and the hinge short rod 6023 moves to drive the microphone 203 to extend into the acoustic cavity 201;

when the second driving mechanism 603 works, the third driving member drives the sliding key to move along the meshing adjustment sliding chute 6033, so that the first bevel gear 6012 and the third bevel gear 6031 are engaged with each other, the first bevel gear 6012 rotates to drive the third bevel gear 6031 to rotate, the third bevel gear 6031 rotates to drive the rotating shaft 6030 to rotate, the rotation shaft 6030 rotates to drive the adjusting gear 6032 to rotate, the adjusting gear 6032 rotates to drive the L-shaped adjusting rack 6035 to move, the L-shaped adjusting rack 6035 moves to drive the microphone 203 to extend into the acoustic cavity 201 under the action of the first hinge link 6040 and the second hinge link 6041, the simultaneous design of the first driving mechanism 602 and the second driving mechanism 603 avoids the occurrence of the condition that the microphone 203 cannot move when one of the two fails, and the microphone driving mechanism 6 makes the testing device more intelligent.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.