Sound insulation box with double-layer sound insulation function

Abstract

The invention provides a sound insulation box with double sound insulation layers, and relates to the technical field of microphone testing. The test box comprises an upper box body, a lower box body, a sound insulation part and a test assembly, and a box opening of the upper box body and a box opening of the lower box body can be spliced to form a sound insulation cavity; the sound insulation part is arranged at the joint of the upper box body and the lower box body and can absorb sound transmitted into the sound insulation cavity from the outside. The test assembly is arranged in the sound insulation cavity and can test the microphone chip. The microphone chip testing device has the advantages that the sound insulation effect is better, the testing result of the microphone chip is more accurate, and errors are not prone to occurring.

Description

Technical Field

[0001] The present application relates to the technical field of microphone testing, and in particular to a soundproof box with double-layer sound insulation. Background Art

[0002] A MEMS microphone is a microphone made using micro-electromechanical (MEMS) technology, also known as a silicon microphone. It is mainly used in small mobile electronic products such as mobile phones, tablet computers, laptops, and hearing aids.

[0003] When testing the audio characteristics of a microphone chip, the microphone chip to be tested needs to be placed in a soundproof box for testing. The soundproof box generally includes an upper box body and a lower box body, which can be assembled to form a soundproof box surrounding the chip to be tested, so that the microphone to be tested can be isolated from external sound sources and low-frequency noise through the soundproof box.

[0004] However, since the joint between the upper box body and the lower box body has poorer sound absorption capability than other parts of the sound insulation box, the sound insulation capability of the sound insulation box is poor.

[0005] In view of this, it is necessary to provide a soundproof box with double-layer sound insulation. Summary of the invention

[0006] In order to solve the problem that the existing sound insulation box has poor sound absorption ability at the joint between the upper box body and the lower box body, resulting in poor sound insulation ability of the entire sound insulation box, the present application provides a sound insulation box with double-layer sound insulation.

[0007] The present application provides a soundproof box with double-layer sound insulation, which adopts the following technical solution: comprising an upper box body, a lower box body, a soundproofing member and a test assembly, wherein the box opening of the upper box body can be combined with the box opening of the lower box body to form a soundproof cavity; The sound insulation member is arranged at the joint between the upper box body and the lower box body and can absorb the sound transmitted from the outside into the sound insulation cavity; The testing component is arranged in the soundproof cavity and can test the microphone chip.

[0008] By adopting the above technical solution, after the upper box and the lower box are assembled, the sound insulation component can seal the joint between the upper box and the lower box and absorb the external sound transmitted into the sound insulation cavity from the gap, so that the test component can test the microphone chip in an environment isolated from external sound sources and low-frequency noise, thereby making the sound insulation effect of the sound insulation box with double-layer sound insulation better, and the test results of the microphone chip are more accurate and less prone to errors.

[0009] Specifically, the sound insulation component includes a sound insulation wall, which is arranged on the box opening of the upper box body, and the bottom of the sound insulation wall can abut against the box opening of the lower box body.

[0010] By adopting the above technical solution, the sound insulation wall can absorb the sound from the outside that is transmitted into the sound insulation cavity through the joint between the upper box body and the lower box body.

[0011] Furthermore, the sound insulation member further comprises a pair of inner sound absorbing rings and a pair of outer sound absorbing rings, and each of the box opening of the lower box body and the sound insulation wall is provided with one of the inner sound absorbing rings; A lower sound absorbing groove is provided on the box opening of the lower box body and surrounds the inner sound absorbing ring on the box opening; an upper sound absorbing groove is provided on the sound insulation wall and surrounds the inner sound absorbing ring on the sound insulation wall; an outer sound absorbing ring is provided in each of the upper sound absorbing groove and the lower sound absorbing groove.

[0012] By adopting the above technical solution, the arrangement of the inner sound absorbing ring and the outer sound absorbing ring can assist the sound insulation wall in absorbing the external sound transmitted into the sound insulation cavity from the joint between the upper box body and the lower box body.

[0013] Specifically, the test component includes a speaker, a sound hole is opened on the upper box body, and the speaker passes through the sound hole and is inserted into the sound insulation cavity.

[0014] By adopting the above technical solution, the speaker can test the sound receiving ability of the microphone chip in the soundproof cavity by playing test audio.

[0015] Furthermore, the test component also includes a microphone. A sound receiving hole is opened on the lower box body, and the microphone is inserted into the sound insulation cavity through the sound receiving hole.

[0016] By adopting the above technical solution, the user can determine whether the microphone chip is defective by comparing the sound receiving capabilities of the microphone chip and the microphone.

[0017] Specifically, it also includes a sound insulation pad, which is arranged at the bottom of the lower box body.

[0018] By adopting the above technical solution, after the lower box is placed on the ground or workbench, the sound insulation pad can reduce and absorb the sound transmitted from the ground or workbench to the sound insulation cavity, so as to further enhance the sound insulation performance of the sound insulation box with double-layer sound insulation.

[0019] Specifically, a positioning column is provided on the box opening of the upper box body, and a positioning hole is opened on the box opening of the lower box body. When the upper box body and the lower box body are assembled, the positioning column is inserted into the positioning hole.

[0020] By adopting the above technical solution, the positioning posts and the positioning holes are provided to enable positioning during the assembly process of the upper box body and the lower box body, so as to ensure that the upper box body and the lower box body can be assembled accurately.

[0021] Furthermore, the test assembly also includes a receiving column, a core-containing plate, an elastic member and a signal terminal, the receiving column is erected on the inner wall of the lower box body, a limiting groove is provided at the bottom of the core-containing plate and is sleeved on the top of the receiving column via the limiting groove, a core-containing groove adapted to the microphone chip is provided at the top of the core-containing plate, the elastic member is provided between the receiving column and the inner wall of the core-containing groove and can apply an upward force to the core-containing plate, the signal terminal is erected on the inner wall of the lower box body, and the top end of the signal terminal passes through the through hole provided on the core-containing plate and extends into the core-containing groove and can abut against the microphone chip in the core-containing groove; When the upper box body is separated from the lower box body, the bottom wall of the nano-core groove is not lower than the top of the signal terminal. When the upper box body is assembled with the lower box body, the inner wall of the upper box body can press down the nano-core board and separate the microphone chip at the top of the signal terminal from the bottom wall of the nano-core groove.

[0022] By adopting the above technical solution, the user can first put the microphone chip to be tested into the nano-core groove when the upper box body is separated from the lower box body. At this time, the elastic member will exert an upward force on the nano-core board, thereby causing the nano-core board to float and move away from the receiving column, and the top of the signal terminal will not be higher than the bottom wall of the nano-core groove, so that the microphone chip can fit with the bottom wall of the nano-core groove; when the upper box body and the lower box body are assembled, the nano-core board will be pressed down by the inner wall of the upper box body, so that the bottom wall of the nano-core groove is lower than the top of the signal terminal, and the microphone chip in the nano-core groove is lifted up by the signal terminal and suspended in the nano-core groove, which not only enables the signal terminal to be electrically connected to the microphone chip, but also expands the contact area between the microphone chip and the air, so that the test audio played by the speaker can be directly transmitted to the bottom of the microphone chip through the air, thereby improving the accuracy of the microphone chip test.

[0023] Furthermore, the test assembly also includes a unloading unit, which includes a ejector pin and a driving member. The bottom of the nanocore plate is provided with an ejector pin hole leading to the nanocore groove, and the ejector pin is inserted into the ejector pin hole. The driving member is transmission-connected to the ejector pin. When the upper box body is separated from the lower box body, the driving member can drive the ejector pin to push the microphone chip in the nanocore groove away from the bottom wall of the nanocore groove.

[0024] By adopting the above technical solution, when the upper box body is separated from the lower box body, the driving member can drive the ejector pin to push the microphone chip in the core slot away from the bottom wall of the core slot, so that the user can easily remove the microphone chip from the core slot.

[0025] Furthermore, the driving member includes a support tube, a vertical compression spring, a block, a transverse compression spring and an abutment column, the support tube is erected on the inner wall of the sound insulation cavity, the bottom end of the ejector pin is inserted into the support tube, and the vertical compression spring is arranged between the bottom end of the ejector pin and the inner wall of the support tube; A receiving groove is provided on the side wall of the ejector pin, one end of the clamping block is inserted into the receiving groove and can move along the receiving groove, a clamping protrusion and an abutting protrusion are provided at the other end of the clamping block, and the transverse compression spring is provided between the clamping block and the inner wall of the receiving groove and can drive the clamping protrusion and the abutting protrusion to move away from the ejector pin; The inner wall of the support tube is provided with a clamping groove and a sliding groove, and when the top of the ejector pin is flush with the bottom wall of the core receiving groove, the clamping protrusion can be inserted into the clamping groove and abut against the inner wall of the clamping groove, and the abutting column is arranged at the bottom of the core receiving plate, and one end of the slide groove extends to the tube mouth of the support tube and forms an opening, and the abutting protrusion is inserted into the slide groove and can slide along the slide groove, and the bottom end of the abutting column forms an inclined surface and a horizontal surface in the direction away from and close to the ejector pin, and the inclined surface is inclined upward in the direction away from and close to the ejector pin, and when the upper box body and the lower box body are spliced, the bottom end of the abutting column can pass through the opening at the top of the slide groove to extend into the slide groove and abut against the abutting protrusion, and drive the abutting protrusion to slide along the inclined surface toward the horizontal surface, and when the abutting protrusion abuts against the horizontal surface, the clamping protrusion leaves the clamping groove.

[0026] By adopting the above technical solution, the user can first put the microphone chip to be tested into the core slot when the upper box is separated from the lower box. At this time, the microphone chip will press the ejector pin down until the top of the ejector pin is flush with the bottom wall of the core slot. At this time, the transverse compression spring will drive the card block to move and drive the card protrusion to insert into the card slot and abut against the inner wall of the card slot, so that the ejector pin can be locked in a position where its top is flush with the bottom wall of the core slot; when the upper box is assembled with the lower box, the core plate It will be pressed down by the inner wall of the upper box body and drive the abutment column to extend downward into the slide groove and abut against the abutment protrusion, and drive the abutment protrusion to slide along the inclined surface of the bottom of the abutment column to the horizontal plane, so that the abutment protrusion drives the card block and the card protrusion to penetrate into the accommodating groove and make the card protrusion leave the card groove, thereby making the locking contact between the ejector pin and the support tube, and the vertical compression spring can drive the ejector pin to move upward and push the microphone chip in the core groove away from the bottom wall of the core groove when the upper box body and the lower box body are separated again.

[0027] In summary, the present application includes at least one of the following beneficial technical effects: 1. It includes an upper box, a lower box, a soundproofing piece and a test assembly. The box opening of the upper box can be assembled with the box opening of the lower box to form a soundproofing cavity. The soundproofing piece is arranged at the joint of the upper box and the lower box and can absorb the sound transmitted from the outside into the soundproofing cavity. The test assembly is arranged in the soundproofing cavity and can test the microphone chip. After the upper box and the lower box are assembled, the soundproofing piece can be used to block the joint between the upper box and the lower box and absorb the sound transmitted from the outside into the soundproofing cavity through the gap. Then, the test assembly can test the microphone chip in an environment that is isolated from external sound sources and low-frequency noise, so that the soundproofing box with double-layer sound insulation has better sound insulation effect, and the test result of the microphone chip is more accurate and less prone to error. 2. The test assembly also includes a receiving column, a core plate, an elastic member and a signal terminal. The receiving column is erected on the inner wall of the lower box body. A limiting groove is provided at the bottom of the core plate and is sleeved on the top of the receiving column through the limiting groove. A core groove matched with the microphone chip is provided at the top of the core plate. The elastic member is provided between the top of the receiving column and the inner wall of the core groove and can apply an upward force to the core plate. The signal terminal is erected on the inner wall of the lower box body, and the top of the signal terminal extends into the core groove through the through hole provided on the core plate and can abut against the microphone chip in the core groove. When the upper box body is separated from the lower box body, the bottom wall of the core groove is not lower than the top of the signal terminal. When the upper box body is assembled with the lower box body, the inner wall of the upper box body can press down the core plate and separate the microphone chip at the top of the signal terminal from the bottom wall of the core groove, so that the user can The microphone chip to be tested can be placed in the nanocore groove when the upper box body is separated from the lower box body. At this time, the elastic part will exert an upward force on the nanocore board, thereby causing the nanocore board to float up and away from the receiving column, and the top of the signal terminal will not be higher than the bottom wall of the nanocore groove, so that the microphone chip can fit with the bottom wall of the nanocore groove; when the upper box body and the lower box body are assembled, the nanocore board will be pressed down by the inner wall of the upper box body, so that the bottom wall of the nanocore groove is lower than the top of the signal terminal, and the microphone chip in the nanocore groove is lifted up by the signal terminal and suspended in the nanocore groove, which not only enables the signal terminal to be electrically connected to the microphone chip, but also expands the contact area between the microphone chip and the air, so that the test audio played by the speaker can be directly transmitted to the bottom of the microphone chip through the air, thereby improving the accuracy of the microphone chip test. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a stereogram of the first embodiment of the present application; Figure 2 yes Figure 1 A three-dimensional view of the upper and middle box; Figure 3 is a bottom view of the first embodiment of the present application; Figure 4 is along Figure 3 A schematic cross-sectional view taken along the AA direction; Figure 5 yes Figure 4 A schematic enlarged view of region B showing the elastic member; Figure 6 is a top view of the lower box body in the second embodiment of the present application; Figure 7 is along Figure 6 A schematic cross-sectional view taken along the CC direction; Figure 8 yes Figure 7 A schematic enlarged view of the area D, showing the unloading unit; Fig. 9 is along Figure 7 A schematic cross-sectional view taken along the EE direction, in which only a quarter of the nanocore board is shown.

[0029] Figure numerals: 1. upper box body; 11. positioning column; 12. upper box groove; 2. lower box body; 21. lower box groove; 3. sound insulation; 31. sound insulation wall; 32. inner sound-absorbing ring; 33. outer sound-absorbing ring; 4. test assembly; 41. speaker; 42. microphone; 43. receiving column; 44. core plate; 45. elastic member; 46. signal terminal; 47. unloading unit; 471. ejector pin; 472. supporting cylinder; 473. vertical compression spring; 474. clamping block; 4741. clamping protrusion; 4742. abutting protrusion; 475. transverse compression spring; 476. abutting column; 5. microphone chip; 6. sound insulation pad. DETAILED DESCRIPTION

[0030] The following is combined with Figure 1-9 For further explanation: See also Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 In the first embodiment, a soundproof box with double-layer sound insulation includes an upper box body 1, a lower box body 2, a sound insulation pad 6, a sound insulation member 3 and a test assembly 4. The lower box body 2 can be placed on a workbench (not shown in the figure), and the top of the upper box body 1 can be connected to a driving device (not shown in the figure) that can be telescopic in the vertical direction, such as a hydraulic cylinder; the interior of the upper box body 1 is provided with 8 upper box grooves 12, and the interior of the lower box body 2 is provided with 8 lower box grooves 21, and the upper box grooves 12 correspond to the lower box grooves 21 one by one, and the box opening of the upper box body 1 can be spliced ​​with the box opening of the lower box body 2 so that each upper box groove 12 is aligned with the corresponding lower box groove The grooves 21 are assembled to form 8 sound insulation chambers; 6 sound insulation pads 6 are provided at the bottom of the lower box body 2, and the sound insulation pads 6 can be silicone pads, so that the sound transmitted to the sound insulation chamber from the ground or the workbench can be reduced and absorbed through the sound insulation pads 6; two positioning columns 11 are also provided on the box opening of the upper box body 1, and two positioning holes are correspondingly opened on the box opening of the lower box body 2. When the upper box body 1 and the lower box body 2 are assembled, each positioning column 11 is inserted into a corresponding positioning hole, so that the upper box body 1 and the lower box body 2 can be positioned during the assembly process through the cooperation of the positioning column 11 and the positioning hole, thereby ensuring that the upper box body 1 and the lower box body 2 can be assembled accurately.

[0031] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5The sound insulation member 3 includes a layer of sound insulation wall 31, a pair of inner sound absorbing rings 32 and a pair of outer sound absorbing rings 33. The sound insulation wall 31 is arranged on the box opening of the upper box body 1, and the sound insulation wall 31 can be made of metal sound absorbing materials such as aluminum; an inner sound absorbing ring 32 is provided on the box opening of the lower box body 2 and the sound insulation wall 31, and a lower sound absorbing groove is provided on the box opening of the lower box body 2 around the inner sound absorbing ring 32 on the box opening, and an upper sound absorbing groove is provided on the sound insulation wall 31 around the inner sound absorbing ring 32 on the sound insulation wall 31, and an outer sound absorbing ring 33 is provided in the upper sound absorbing groove and the lower sound absorbing groove, and the above-mentioned inner sound absorbing ring 32 and the outer sound absorbing ring 33 can be made of sound insulation cotton. When the upper box body 1 and the lower box body 2 are assembled, the two inner sound absorbing rings 32 will abut against each other, and the two outer sound absorbing rings 33 will also abut against each other, and the sound insulation wall The rest of the bottom of 31 will abut against the box opening of the lower box body 2, so that the joint between the upper box body 1 and the lower box body 2 can be blocked by these sound insulation parts 3 and the sound from the outside that is transmitted into the sound insulation cavity from the gap can be absorbed, so that the test component 4 can test the microphone 42 chip in an environment that is isolated from external sound sources and low-frequency noise; experimental data show that when the sound insulation parts 3 are not set, the noise from the outside received by the sound insulation cavity is 14db, and after the sound insulation parts 3 are set, the noise from the outside received by the sound insulation cavity is only 7.5-8db; thereby, the sound insulation effect of the sound insulation box with double-layer sound insulation is better, and then the test result of the microphone 42 chip by a sound insulation box with double-layer sound insulation is more accurate and less prone to errors.

[0032] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 The test component 4 includes 8 speakers 41, 8 microphones 42, 32 receiving columns 43, 8 core plates 44, 32 elastic members 45 and 32 signal terminals 46. The 8 speakers 41 and the 8 microphones 42 correspond to the 8 sound insulation chambers one by one. A sound hole is provided on the top wall of each upper box groove 12. Each speaker 41 is inserted into a corresponding sound insulation chamber through a corresponding sound hole, so that the sound receiving ability of the microphone 42 chip in the sound insulation chamber can be tested by playing the test audio through the speaker 41; a sound receiving hole is provided on the bottom wall of each lower box groove 21. Each microphone 42 is inserted into a corresponding sound insulation chamber through a corresponding sound receiving hole, so that the user can judge whether the microphone 42 chip is defective by comparing the sound receiving ability of the microphone 42 chip with that of the microphone 42.

[0033] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5, each lower box groove 21 corresponds to 4 receiving columns 43, 1 nanocore board 44, 4 elastic members 45 and 4 signal terminals 46, and each nanocore board 44 has four nanocore grooves adapted to the microphone 42 chip on the top, and each nanocore groove corresponds to a signal terminal 46; each receiving column 43 is erected on the inner wall of a corresponding lower box groove 21, and each nanocore board 44 has four limiting grooves on the bottom and is sleeved on the top of the four receiving columns 43 through these limiting grooves, and each receiving column 43 is sleeved with an elastic member 45, which can be a compression spring so that it can apply an upward force to the nanocore board 44 through the compression spring; the top of each signal terminal 46 passes through the through hole opened on the corresponding nanocore board 44 and extends into the corresponding nanocore groove and can abut the microphone 42 chip in the nanocore groove, so that the user can first move the upper box body 1 to the lower box body 2 when the upper box body 1 is separated from the lower box body 2. The microphone 42 chip to be tested is placed in the nanocore groove. At this time, the elastic member 45 will apply an upward force to the nanocore board 44, thereby causing the nanocore board 44 to float up and away from the receiving column 43, and the top of the signal terminal 46 will not be higher than the bottom wall of the nanocore groove, so that the microphone 42 chip can fit with the bottom wall of the nanocore groove; when the upper box body 1 and the lower box body 2 are assembled, the nanocore board 44 will be pressed down by the inner wall of the upper box body 1, so that the bottom wall of the nanocore groove is lower than the top of the signal terminal 46, and the microphone 42 chip in the nanocore groove is lifted up by the signal terminal 46 and suspended in the nanocore groove, which not only enables the signal terminal 46 to be electrically connected to the microphone 42 chip, but also expands the contact area between the microphone 42 chip and the air, so that the test audio played by the speaker 41 can be directly transmitted to the bottom of the microphone 42 chip through the air, thereby improving the accuracy of the microphone 42 chip test.

[0034] See also Figure 6 , Figure 7 , Figure 8 and Fig. 9In the second embodiment, the test assembly 4 further includes 32 unloading units 47, and the unloading units 47 correspond to the core slots one by one. Each unloading unit 47 includes a pin 471 and a set of driving parts. The bottom of the core plate 44 is provided with a pin 471 hole leading to the core slot, and the pin 471 is inserted into the pin 471 hole. Each set of driving parts includes a support cylinder 472, a vertical compression spring 473, a block 474, a transverse compression spring 475 and an abutment column 476. The support cylinder 472 is erected on On the inner wall of the sound insulation cavity, the bottom end of the ejector pin 471 is inserted into the support tube 472, and the vertical compression spring 473 is arranged between the bottom end of the ejector pin 471 and the inner wall of the support tube 472; a receiving groove is provided on the side wall of the ejector pin 471, one end of the clamping block 474 is inserted into the receiving groove and can move along the receiving groove, and a clamping protrusion 4741 and an abutting protrusion 4742 are provided at the other end of the clamping block 474, and a transverse compression spring 475 is arranged between the clamping block 474 and the inner wall of the receiving groove and can drive the clamping block 474 The clamping protrusion 4741 and the abutting protrusion 4742 are driven away from the ejector pin 471; a clamping groove and a sliding groove are provided on the inner wall of the support cylinder 472. When the top of the ejector pin 471 is flush with the bottom wall of the core receiving groove, the clamping protrusion 4741 can be inserted into the clamping groove and abut against the inner wall of the clamping groove. The abutting column 476 is provided at the bottom of the core receiving plate 44. One end of the sliding groove extends to the tube mouth of the support cylinder 472 and forms an opening. The abutting protrusion 4742 is inserted into the sliding groove and can slide along the sliding groove. The bottom end of the connecting column 476 is formed with an inclined surface and a horizontal surface in the direction away from and close to the ejector pin 471. The inclined surface is inclined upward in the direction away from and close to the ejector pin 471. When the upper box body 1 and the lower box body 2 are assembled, the bottom end of the abutting column 476 can pass through the opening at the top of the slide groove and extend into the slide groove to abut against the abutting protrusion 4742, and drive the abutting protrusion 4742 to slide along the inclined surface to the horizontal plane. When the abutting protrusion 4742 abuts against the horizontal plane, the clamping protrusion 4741 leaves the clamping groove.

[0035] The working process of the second embodiment provided in this application is as follows: The user can first put the microphone 42 chip to be tested into the core slot when the upper box body 1 is separated from the lower box body 2. At this time, the microphone 42 chip will press the ejector pin 471 down until the top of the ejector pin 471 is flush with the bottom wall of the core slot. At this time, the transverse compression spring 475 will drive the card block 474 to move and drive the card protrusion 4741 to insert into the card slot and abut against the inner wall of the card slot, so that the ejector pin 471 can be locked in a position where its top is flush with the bottom wall of the core slot; when the upper box body 1 and the lower box body 2 are assembled, the core plate 44 will be pressed down by the inner wall of the upper box body 1 and drive the abutment column 476 to extend downward to the slide The abutment protrusion 4742 abuts against the groove and drives the abutment protrusion 4742 to slide toward the horizontal plane along the inclined surface at the bottom of the abutment column 476, so that the abutment protrusion 4742 drives the card block 474 and the card-connecting protrusion 4741 to penetrate into the accommodating groove and makes the card-connecting protrusion 4741 leave the card-connecting groove, thereby making the locking contact between the ejector pin 471 and the support tube 472, and the vertical compression spring 473 can drive the ejector pin 471 to move upward and push the microphone 42 chip in the core-containing groove away from the bottom wall of the core-containing groove when the upper box body 1 and the lower box body 2 are separated again, so as to facilitate the user to remove the microphone 42 chip from the core-containing groove.

[0036] The implementation principle of a soundproof box with double-layer sound insulation described in this application is: The sound insulation member 3 includes a layer of sound insulation wall 31, a pair of inner sound absorbing rings 32 and a pair of outer sound absorbing rings 33. The sound insulation wall 31 is arranged on the box opening of the upper box body 1, and the sound insulation wall 31 can be made of metal sound absorbing materials such as aluminum; an inner sound absorbing ring 32 is provided on the box opening of the lower box body 2 and the sound insulation wall 31, and a lower sound absorbing groove is provided on the box opening of the lower box body 2 around the inner sound absorbing ring 32 on the box opening, and an upper sound absorbing groove is provided on the sound insulation wall 31 around the inner sound absorbing ring 32 on the sound insulation wall 31, and an outer sound absorbing ring 33 is provided in the upper sound absorbing groove and the lower sound absorbing groove, and the above-mentioned inner sound absorbing ring 32 and outer sound absorbing ring 33 can be made of sound insulation cotton. When the upper box body 1 and the lower box body 2 are assembled, the two inner sound absorbing rings 32 will abut against each other, and the two outer sound absorbing rings 33 will also abut against each other, and the sound insulation wall 3 The rest of the bottom of 1 will abut against the box opening of the lower box 2, so that the seam between the upper box 1 and the lower box 2 can be blocked by these sound insulation members 3 and the sound from the outside transmitted into the sound insulation cavity through the gap can be absorbed, so that the test component 4 can test the microphone 42 chip in an environment that is isolated from external sound sources and low-frequency noise; experimental data show that when the sound insulation member 3 is not set, the noise from the outside received by the sound insulation cavity is 14db, and after the sound insulation member 3 is set, the noise from the outside received by the sound insulation cavity is only 7.5-8db; thereby, the sound insulation effect of the sound insulation box with double-layer sound insulation is better, and then the test result of the microphone 42 chip by a sound insulation box with double-layer sound insulation is more accurate and less prone to errors.

[0037] The embodiments of this specific implementation are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. The same components are represented by the same figure marks. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A soundproof box with double-layer sound insulation, characterized in that: It comprises an upper box (1), a lower box (2), a sound insulation member (3) and a test assembly (4), wherein the box opening of the upper box (1) can be combined with the box opening of the lower box (2) to form a sound insulation chamber; The sound insulation member (3) is arranged at the joint between the upper box body (1) and the lower box body (2) and is capable of absorbing the sound transmitted from the outside into the sound insulation cavity; The test component (4) is arranged in the sound insulation cavity and is capable of testing the microphone (42) chip.

2. A soundproof box with double-layer sound insulation according to claim 1, characterized in that: The sound insulation member (3) comprises a sound insulation wall (31), the sound insulation wall (31) is arranged on the box opening of the upper box body (1), and the bottom of the sound insulation wall (31) can abut against the box opening of the lower box body (2).

3. A soundproof box with double-layer sound insulation according to claim 2, characterized in that: The sound insulation member (3) further comprises a pair of inner sound absorbing rings (32) and a pair of outer sound absorbing rings (33), and the box opening of the lower box body (2) and the sound insulation wall (31) are each provided with one of the inner sound absorbing rings (32); A lower sound absorbing groove is provided on the box opening of the lower box body (2) and surrounds the inner sound absorbing ring (32) on the box opening; an upper sound absorbing groove is provided on the sound insulation wall (31) and surrounds the inner sound absorbing ring (32) on the sound insulation wall (31); and an outer sound absorbing ring (33) is provided in each of the upper sound absorbing groove and the lower sound absorbing groove.

4. The soundproof box with double-layer sound insulation according to claim 1, characterized in that: The test assembly (4) comprises a speaker (41); a sound-releasing hole is provided on the upper box body (1); and the speaker (41) passes through the sound-releasing hole and is inserted into the sound-isolating cavity.

5. A soundproof box with double-layer sound insulation according to claim 4, characterized in that: The test assembly (4) also includes a microphone (42). A sound receiving hole is provided on the lower box body (2), and the microphone (42) is inserted into the sound insulation cavity through the sound receiving hole.

6. The soundproof box with double-layer sound insulation according to claim 1, characterized in that: It also includes a sound insulation pad (6), which is arranged at the bottom of the lower box body (2).

7. The double-layer soundproof box according to claim 1, characterized in that: A positioning column (11) is provided on the box opening of the upper box body (1), and a positioning hole is opened on the box opening of the lower box body (2). When the upper box body (1) and the lower box body (2) are assembled, the positioning column (11) is inserted into the positioning hole.

8. The soundproof box with double-layer sound insulation according to claim 5, characterized in that: The test assembly (4) further comprises a receiving column (43), a core-slotting plate (44), an elastic member (45) and a signal terminal (46); the receiving column (43) is erected on the inner wall of the lower box (2); a limiting groove is provided at the bottom of the core-slotting plate (44) and is sleeved on the top of the receiving column (43) via the limiting groove; a core-slotting plate (44) is provided at the top of the core-slotting plate (44) and is adapted to the microphone (42) chip; the elastic member (45) is provided between the receiving column (43) and the inner wall of the core-slotting plate and is capable of applying an upward force to the core-slotting plate (44); the signal terminal (46) is erected on the inner wall of the lower box (2); and the top end of the signal terminal (46) passes through a through hole provided on the core-slotting plate (44) and extends into the core-slotting plate and is capable of abutting against the microphone (42) chip in the core-slotting plate; When the upper box (1) is separated from the lower box (2), the bottom wall of the nano-core groove is not lower than the top of the signal terminal (46); when the upper box (1) is assembled with the lower box (2), the inner wall of the upper box (1) can press down the nano-core board (44) and separate the microphone (42) chip at the top of the signal terminal (46) from the bottom wall of the nano-core groove.

9. The soundproof box with double-layer sound insulation according to claim 8, characterized in that: The test assembly (4) also includes a discharge unit (47), and the discharge unit (47) includes a pin (471) and a driving member. The bottom of the nanocore plate (44) is provided with a pin (471) hole leading to the nanocore groove, and the pin (471) is inserted into the pin (471) hole. The driving member is connected to the pin (471) in a transmission manner. When the upper box body (1) and the lower box body (2) are separated, the driving member can drive the pin (471) to push the microphone (42) chip in the nanocore groove away from the bottom wall of the nanocore groove.

10. A soundproof box with double-layer sound insulation according to claim 9, characterized in that: The driving member comprises a support tube (472), a vertical compression spring (473), a block (474), a transverse compression spring (475) and an abutment column (476); the support tube (472) is erected on the inner wall of the sound insulation cavity; the bottom end of the ejector pin (471) is inserted into the support tube (472); and the vertical compression spring (473) is arranged between the bottom end of the ejector pin (471) and the inner wall of the support tube (472); A receiving groove is provided on the side wall of the ejector pin (471), one end of the clamping block (474) is inserted into the receiving groove and can move along the receiving groove, and a clamping protrusion (4741) and an abutting protrusion (4742) are provided at the other end of the clamping block (474), and the transverse compression spring (475) is provided between the clamping block (474) and the inner wall of the receiving groove and can drive the clamping block (474) to drive the clamping protrusion (4741) and the abutting protrusion (4742) away from the ejector pin (471); The inner wall of the support tube (472) is provided with a snap-in groove and a slide groove. When the top of the ejector pin (471) is flush with the bottom wall of the core receiving groove, the snap-in protrusion (4741) can be inserted into the snap-in groove and abut against the inner wall of the snap-in groove. The abutment column (476) is provided at the bottom of the core receiving plate (44). One end of the slide groove extends to the tube mouth of the support tube (472) and forms an opening. The abutment protrusion (4742) is inserted into the slide groove and can slide along the slide groove. The bottom end of the abutment column (476) moves away from and close to the ejector pin (471). An inclined surface and a horizontal surface are formed in the direction of the ejector pin (471), and the inclined surface is inclined upward in the direction away from and close to the ejector pin (471). When the upper box body (1) and the lower box body (2) are assembled, the bottom end of the abutment column (476) can pass through the opening at the top of the slide groove and extend into the slide groove to abut against the abutment protrusion (4742), and drive the abutment protrusion (4742) to slide along the inclined surface toward the horizontal surface. When the abutment protrusion (4742) abuts against the horizontal surface, the locking protrusion (4741) leaves the locking groove.

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