Sound box acoustic testing device

Abstract

The invention discloses a sound box acoustic test device, which belongs to the technical field of acoustic test equipment and comprises an isolation test box, and an end cover structure is connected to an opening of the side wall of the isolation test box. And a detection unit which works in cooperation with the end cover structure is arranged in the isolation test box. Passive dehumidification processing is carried out on the internal environment of the device in a closed state through a drying assembly in the end cover structure, and when a bin door in the end cover structure is opened, a to-be-tested loudspeaker box is placed on the top surface of the test platform assembly pulled out from the interior of the isolation test box; then, the bin door is closed, the test platform assembly is slowly pushed back into the isolation test box, and the test platform assembly drives the gear assembly to rotate through the tooth groove, so that when the inflator assembly moving along with the traction screw sleeve is gradually shrunk; the contracted air cylinder assembly continuously pumps air in the isolation test box back into the drying unit through the first flow guide hose after the air passes through the drying unit, and active dehumidification and drying treatment on the test environment is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of acoustic testing equipment, and more specifically, to an acoustic testing device for speakers. Background Art

[0002] Audio is a simplified daily term, which is the abbreviation of an audio system, that is, it refers to a complete set of equipment that can restore and play audio signals.

[0003] Acoustic testing equipment is an instrument used to measure, analyze, and evaluate sound-related parameters, covering the detection of basic acoustic characteristics (such as sound pressure level, frequency response) to complex acoustic performances (such as distortion, directivity). These devices convert sound signals into quantifiable data by simulating the auditory characteristics of the human ear or physical acoustic principles, helping engineers optimize product design and quality control to meet specific acoustic application requirements.

[0004] Currently, during the process of acoustic testing of speakers by people indoors using existing acoustic testing devices, it is easy for the sound waves emitted by the speakers to interact more strongly with water molecules in indoor moisture during propagation, causing changes in sound speed and attenuation of sound energy. Especially in weather such as during the period of returning south, the plum rain season, etc., the indoor humidity increases, further increasing the impact on the acoustic test results of the speakers, thereby causing the distortion of the acoustic test results of the speakers and affecting the accuracy of the test results.

[0005] In view of this, we propose an acoustic testing device for speakers. Summary of the Invention

[0006] Technical Problem to be Solved: The purpose of the present invention is to provide an acoustic testing device for speakers, which solves the technical problems raised in the above background art.

[0007] Technical Solution: The technical solution of the present invention provides an acoustic testing device for speakers, including an isolation test box, and an end cover structure is connected to the opening of the side wall of the isolation test box; A detection unit that cooperates with the end cover structure is provided inside the isolation test box. The detection unit includes a base assembly and a test platform assembly slidably connected to the top of the base assembly; The test platform assembly includes rows of arranged tooth grooves and two vertically arranged frame assemblies symmetrically arranged on the left and right. The frame assembly includes a horizontal air cavity, and a driving piston is hermetically slidable in the horizontal air cavity, and a side clamping member is provided on the driving piston; The base assembly includes a gear assembly. The gear assembly includes a bidirectional screw rotatably connected inside the base assembly. A transmission gear meshing with the tooth grooves is sleeved on the outer periphery of the bidirectional screw. Two traction nuts arranged symmetrically left and right are threadedly connected to the bidirectional screw. Each traction nut is provided with a pneumatic cylinder assembly that can move telescopically, and one end of the pneumatic cylinder assembly away from the traction nut is connected to the inner wall of the base assembly. The pneumatic cylinder assembly includes a first diversion hose and a second diversion hose; The end cover structure includes a hollow strip base and a square bellows inside it. Sound-absorbing components are provided on the inner walls of several V-shaped folds in the square bellows. The sound-absorbing components include a strip-shaped outer shell body with holes on its surface. A drying unit is provided inside the strip-shaped outer shell body. The drying unit includes a connecting pipeline, and the inner cavity of the drying unit is connected to the inner cavity of the hollow strip base through the connecting pipeline. Sound-absorbing materials are also filled inside the strip-shaped outer shell body; One end of the second diversion hose away from the pneumatic cylinder assembly is connected to the horizontal air cavity channel, and one end of the first diversion hose away from the pneumatic cylinder assembly is connected to the inner cavity of the hollow strip base; When the pulled test platform assembly is continuously pushed back into the isolation test chamber, and the test platform assembly drives the gear assembly to rotate through the tooth grooves, causing the pneumatic cylinder assembly that follows the traction nut to gradually contract, while the contracting pneumatic cylinder assembly injects gas into the horizontal air cavity channel through the second diversion hose, it also sucks the gas inside the isolation test chamber through the drying unit connected to the first diversion hose.

[0008] As an alternative solution of the technical solution of this invention document, the base assembly further includes a hollow base connected to the bottom wall of the inner cavity of the isolation test chamber; The bidirectional screw in the gear assembly is rotatably connected inside the top opening of the hollow base.

[0009] As an alternative solution of the technical solution of this invention document, the test platform assembly further includes a test execution unit and a horizontal top platform; The horizontal top platform slides horizontally on the top of the hollow base, and tooth grooves are provided on the bottom of the horizontal top platform and mesh with the transmission gear in the gear assembly.

[0010] As an alternative solution of the technical solution of this invention document, the stand assembly further includes a rigid pipeline and an L-shaped side frame connected to the side wall of the horizontal top platform. The horizontal air cavity channel is arranged inside the L-shaped side frame; The rigid pipeline is fixedly connected to the side wall of the second diversion hose; One end of the rigid pipeline away from the second diversion hose is connected with an air balance cylinder seat. An upper frustum chamber is opened at the top of the air balance cylinder seat. A middle narrowing channel and a lower frustum chamber are respectively arranged inside the air balance cylinder seat. The middle narrowing channel is located between the upper frustum chamber and the lower frustum chamber. The rigid pipeline extends into the air balance cylinder seat and is communicated with one end of the lower frustum chamber away from the middle narrowing channel. And the upper frustum chamber is communicated with the lower frustum chamber through the middle narrowing channel; A reciprocating piston is hermetically slidable in the middle narrowing channel. A guide rod is hermetically slidably inserted at the bottom end of the air balance cylinder seat. A limiting block is connected to the bottom end of the guide rod. The top end of the guide rod extends into the lower frustum chamber and is connected with the reciprocating piston; A return spring connected between the lower frustum chamber and the reciprocating piston is also sleeved outside the guide rod.

[0011] As an alternative of the technical solution of the present invention document, the side clamp includes a connecting rod connected to the actuating piston. And one end of the connecting rod away from the actuating piston hermetically passes through the end of the L-shaped side frame and is connected with a clamping seat. An anti-slip gasket is also connected to one side of the clamping seat away from the connecting rod.

[0012] As an alternative of the technical solution of the present invention document, the air cylinder assembly further includes a passive air cylinder connected to the traction screw sleeve and horizontally slidable in the inner cavity of the hollow base. A fixed plug rod is hermetically slidably inserted at the end of the passive air cylinder; An airtight piston is hermetically slidable in the inner cavity of the passive air cylinder. One end of the fixed plug rod extends into the inner cavity of the passive air cylinder and is connected with the airtight piston. The other end is connected to the inner cavity side wall of the hollow base; One end of the first diversion hose is fixedly communicated with one end of the passive air cylinder close to the fixed plug rod. One end of the second diversion hose is fixedly communicated with one end of the passive air cylinder away from the fixed plug rod.

[0013] As an alternative of the technical solution of the present invention document, the other end of the second diversion hose is connected to the side wall of the L-shaped side frame and is communicated with one end of the horizontal air cavity away from the connecting rod.

[0014] As an alternative of the technical solution of the present invention document, the end cover structure further includes an extended end cover covering the outside of the side wall opening of the isolation test box and connected to the side wall of the isolation test box. A chamber door is hinged at the opening of the end of the extended end cover. And the chamber door is connected to the extended end cover through a lock; One end of the horizontal top platform close to the chamber door extends out from the opening of the end of the extended end cover. The bottom surface of the horizontal top platform is hermetically attached to the bottom wall of the opening of the end of the extended end cover. And the horizontal top platform is detachably connected to the bottom of the chamber door; When the chamber door is closed, the top surface of the horizontal top platform is hermetically attached to the bottom of the chamber door; The square bellows cover is arranged around the outer periphery of the side wall opening of the isolation test chamber, one end of the square bellows cover is connected to the side wall of the isolation test chamber, and the other end is connected to the inner cavity end of the extension end cover; The hollow bar seat is connected to the side wall of the extension end cover, and one end of the hollow bar seat close to the extension end cover extends into the inner cavity of the extension end cover; The other end of the first diversion hose respectively passes through the hollow base and the side wall of the isolation test chamber movably and is fixedly communicated with the side wall of the hollow bar seat.

[0015] As an alternative solution of the technical solution of the present invention document, the drying unit further includes an embedded drying box connected to the inner cavity of the strip-shaped housing. The inner cavity of the embedded drying box is filled with a moisture-absorbing particle layer. A baffle is hermetically connected to the opening at the end of the embedded drying box, and holes with an inner diameter smaller than the particle size of the moisture-absorbing particles in the moisture-absorbing particle layer are formed in the baffle; A dust removal net is also connected to the inner cavity of the embedded drying box; A narrowing cavity communicating with the inner cavity of the embedded drying box is further provided inside the embedded drying box, and the dust removal net is located between the inner cavity and the narrowing cavity of the embedded drying box; One end of the connecting pipeline passes through the side wall of the strip-shaped housing and is connected to the end of the embedded drying box, and the end of the connecting pipeline extends into the embedded drying box and is communicated with the narrowing cavity; The other end of the connecting pipeline passes through the fold in the square bellows cover and is fixedly communicated with the bottom end of the hollow bar seat; The test execution unit includes an audio analyzer, a microphone and a support frame. The bottom of the support frame is connected with a base, and both the base and the audio analyzer are detachably installed on the top of the horizontal top platform; The top of the support frame is connected with a top seat, and the microphone is detachably installed on the top seat.

[0016] As an alternative solution of the technical solution of the present invention document, a sound-absorbing board made of sound-absorbing material is also connected to the inner cavity of the isolation test chamber.

[0017] Beneficial effects: One or more technical solutions provided in the technical solution of the present invention have at least the following technical effects or advantages: 1. Before the acoustic test of the speaker, the drying component in the end cover structure is used to passively dehumidify the environment inside the closed device. When the door of the end cover structure is opened, the speaker to be tested is placed on the top surface of the test platform component pulled out from the inside of the isolation test box. Then the door is closed and the test platform component is slowly pushed back into the isolation test box. And when the test platform component drives the gear component to rotate through the tooth groove, and the air cylinder component following the traction sleeve gradually contracts, the contracting air cylinder component sucks the gas inside the isolation test box through the drying unit connected to the first diversion hose, realizing the active dehumidification and drying treatment of the test environment, effectively avoiding the situation that the acoustic test result of the speaker is distorted due to the influence of moisture in the environment.

[0018] 2. In the process of slowly pushing the test platform component back into the isolation test box and the air cylinder component gradually contracting following the moving traction sleeve, while sucking the gas inside the isolation test box through the drying unit connected to the first diversion hose, gas is continuously injected into the horizontal air cavity through the second diversion hose to drive the side clamping members to move, so that the side clamping members located on both sides of the speaker to be tested clamp and fix the speaker, avoiding the displacement or shaking of the speaker caused by the vibration generated during playback during the test. While ensuring the dryness of the speaker test environment, the device can also ensure the stability of the speaker in the dry test environment, and further avoid the situation that the test result is distorted due to the change in the distance between the speaker and the microphone in the test execution unit during the test, which helps to improve the accuracy of the speaker acoustic test result.

[0019] 3. By arranging the sound-absorbing component with sound-absorbing material inside on the inner wall of the V-shaped fold of the square bellows cover, it helps to multiply the sound-absorbing area. Then, the sound-absorbing material located inside the strip-shaped outer shell absorbs the reflected sound formed after the speaker emits sound during the test process inside the test device, reducing the environmental noise, making the test signal purer, and avoiding the superposition of the reflected sound and the direct sound emitted by the speaker in the test environment, resulting in the distortion of the test signal of the test execution unit and thus being unable to accurately reflect the true test result of the speaker, which helps to further improve the accuracy of the speaker acoustic test result.

[0020] 4. While the device conducts passive and active dehumidification and drying on the test environment to maintain the dryness of the test environment, it also helps to keep the sound-absorbing material inside the strip-shaped outer casing dry. When the speaker is being tested, it can effectively ensure the dryness of the test environment, avoid the distortion of the speaker's acoustic test results due to the influence of moisture in the environment, and at the same time, effectively prevent the situation where the sound-absorbing material absorbs water in its pores due to moisture, resulting in the pores being filled with water and thus reducing the sound absorption coefficient, effectively guaranteeing the accuracy of the speaker's acoustic test results. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0022] Figure 2 It is a schematic diagram of the internal structure of the isolation test box in the present invention.

[0023] Figure 3 In the present invention Figure 2 It is a partially enlarged schematic diagram of part A.

[0024] Figure 4 In the present invention Figure 2 It is a partially enlarged schematic diagram of part B.

[0025] Figure 5 It is a schematic diagram of the internal structure of the end cap structure in the present invention.

[0026] Figure 6 In the present invention Figure 2 It is a sectional view taken along the A-A plane.

[0027] Figure 7 It is a sectional view of the detection unit in the present invention.

[0028] Figure 8 In the present invention Figure 7 It is a partially enlarged schematic diagram of part C.

[0029] Figure 9 In the present invention Figure 7 It is a partially enlarged schematic diagram of part D.

[0030] Figure 10 In the present invention Figure 2 It is a sectional view taken along the B-B plane.

[0031] Figure 11 In the present invention Figure 10 It is a partially enlarged schematic diagram of part E.

[0032] Figure 12 In the present invention Figure 11 It is a partially enlarged schematic diagram of part F.

[0033] Description of the reference numerals in the figures: 10. Isolation test chamber; 201. Extension end cover; 202. Chamber door; 203. Hollow strip base; 204. First diversion hose; 205. L-shaped side frame; 206. Pneumatic balance cylinder base; 207. Reciprocating piston; 208. Second diversion hose; 209. Square bellows cover; 210. Horizontal top platform; 211. Hollow base; 212. Passive cylinder; 213. Airtight piston; 214. Fixed plug rod; 215. Transmission gear; 216. Driving piston; 217. Clamping seat; 218. Bidirectional screw; 219. Traction screw sleeve; 220. Return spring; 221. Strip-shaped outer shell; 222. Connecting pipeline; 223. Embedded drying box; 224. Dust removal net; 225. Hygroscopic particle layer; 30. Sound-absorbing board; 401. Audio analyzer; 402. Microphone; 403. Support frame. Detailed implementation mode

[0034] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts shall fall within the scope of protection of the present invention.

[0035] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention.

[0036] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be a direct connection or an indirect connection through an intermediate medium, and it may be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] Example 1, refer to Figures 1 to 11, an embodiment of the present invention provides an acoustic testing device for a speaker, which includes an isolation testing box 10, and an end cover structure is connected to the opening of the side wall of the isolation testing box 10; Inside the isolation testing box 10, there is a detection unit that cooperates with the end cover structure. The detection unit includes a base assembly and a test platform assembly slidably connected to the top of the base assembly; The test platform assembly includes rows of tooth grooves and two vertically arranged frame assemblies symmetrically arranged on the left and right. The frame assembly includes a horizontal air cavity, and a driving piston 216 is hermetically slidable in the horizontal air cavity. A side clamping member is provided on the driving piston 216; The base assembly includes a gear assembly. The gear assembly includes a bidirectional screw 218 rotatably connected to the inside of the base assembly. A transmission gear 215 meshing with the tooth grooves is sleeved on the outer circumference of the bidirectional screw 218. Two traction nuts 219 arranged symmetrically left and right are threadedly connected to the bidirectional screw 218. Each traction nut 219 is provided with an air cylinder assembly that can move and expand telescopically, and one end of the air cylinder assembly away from the traction nut 219 is connected to the inner wall of the base assembly. The air cylinder assembly includes a first diversion hose 204 and a second diversion hose 208; The end cover structure includes a hollow strip seat 203 and a square bellows 209 inside it. Sound-absorbing components are provided on the inner walls of several V-shaped folds in the square bellows 209. The sound-absorbing components include a strip-shaped outer shell 221 with holes on its surface. A drying unit is provided inside the strip-shaped outer shell 221. The drying unit includes a connecting pipeline 222, and the inner cavity of the drying unit is connected to the inner cavity of the hollow strip seat 203 through the connecting pipeline 222. Sound-absorbing materials are also filled inside the strip-shaped outer shell 221; One end of the second diversion hose 208 away from the air cylinder assembly is connected to the horizontal air cavity, and one end of the first diversion hose 204 away from the air cylinder assembly is connected to the inner cavity of the hollow strip seat 203; When the pulled-out test platform assembly is continuously pushed back into the isolation testing box 10, and the test platform assembly drives the gear assembly to rotate through the tooth grooves, so that the air cylinder assembly following the movement of the traction nut 219 gradually contracts, while the contracting air cylinder assembly injects gas into the horizontal air cavity through the second diversion hose 208, it sucks the gas inside the isolation testing box 10 through the drying unit connected to the first diversion hose 204.

[0038] Before the acoustic test of the speaker, the drying component in the end cap structure is used to passively dehumidify the environment inside the closed device. When the door 202 in the end cap structure is opened, the speaker to be tested is placed on the top surface of the test platform component pulled out from the inside of the isolation test box 10. Then the door 202 is closed and the test platform component is slowly pushed back into the isolation test box 10. And when the test platform component drives the gear component to rotate through the tooth groove, the air cylinder component following the traction sleeve 219 gradually contracts. When the contracted air cylinder component sucks the gas inside the isolation test box 10 through the drying unit connected to the first diversion hose 204, the active dehumidification and drying treatment of the test environment is realized, effectively avoiding the distortion of the speaker acoustic test results affected by the moisture in the environment.

[0039] Refer to Figure 6 and Figure 7 In the embodiment of the present invention, an acoustic test device for a speaker is provided. The base component further includes a hollow base 211 connected to the inner bottom wall of the isolation test box 10; The bidirectional screw 218 in the gear component is rotatably connected to the inner opening at the top of the hollow base 211.

[0040] Refer to Figure 2 , Figures 5 to 7 , Figure 10 In the embodiment of the present invention, an acoustic test device for a speaker is provided. The test platform component further includes a test execution unit and a horizontal top platform 210; The horizontal top platform 210 slides horizontally on the top of the hollow base 211, and the tooth groove is arranged at the bottom of the horizontal top platform 210 and meshes with the transmission gear 215 in the gear component.

[0041] Refer to Figure 2 , Figure 4 , Figure 6 , Figure 7 and Figure 9 In the embodiment of the present invention, an acoustic test device for a speaker is provided. The vertical frame component further includes a rigid pipeline and an L-shaped side frame 205 connected to the side wall of the horizontal top platform 210. A horizontal air cavity is arranged inside the L-shaped side frame 205; The rigid pipeline is fixedly connected to the side wall of the second diversion hose 208; One end of the rigid pipeline away from the second diversion hose 208 is connected with an air balance cylinder seat 206. An upper frustum chamber is opened at the top of the air balance cylinder seat 206. A middle narrowing channel and a lower frustum chamber are respectively arranged inside the air balance cylinder seat 206. The middle narrowing channel is located between the upper frustum chamber and the lower frustum chamber. The rigid pipeline extends into the air balance cylinder seat 206 and is connected to one end of the lower frustum chamber away from the middle narrowing channel. And the upper frustum chamber is connected to the lower frustum chamber through the middle narrowing channel; Inside the middle-narrowed channel, a reciprocating piston 207 slides in a sealed manner. At the bottom end of the air balance cylinder base 206, a guide rod is inserted in a sealed and sliding manner. The bottom end of the guide rod is connected with a limit block, and the top end of the guide rod extends into the lower frustum chamber and is connected with the reciprocating piston 207; A return spring 220 is also sleeved outside the guide rod and is connected between the lower frustum chamber and the reciprocating piston 207.

[0042] Refer to Figure 6 、 Figure 7 and Figure 9 and

[0043] Refer to Figure 6 、 Figure 7 and Figure 10 In an embodiment of the present invention, a speaker acoustic testing device is provided. The side clamping member includes a connecting rod connected to the actuating piston 216. One end of the connecting rod away from the actuating piston 216 passes through the end of the L-shaped side frame 205 in a sealed manner and is connected with a clamping seat 217. A non-slip gasket is also connected to the side of the clamping seat 217 away from the connecting rod. An airtight piston 213 slides in a sealed manner inside the passive air cylinder 212. One end of the fixed plug rod 214 extends into the inner cavity of the passive air cylinder 212 and is connected with the airtight piston 213, and the other end is connected to the inner cavity side wall of the hollow base 211; One end of the first diversion hose 204 is fixedly communicated with one end of the passive air cylinder 212 close to the fixed plug rod 214, and one end of the second diversion hose 208 is fixedly communicated with the other end of the passive air cylinder 212 away from the fixed plug rod 214; The other end of the second diversion hose 208 is connected to the side wall of the L-shaped side frame 205 and is communicated with one end of the horizontal air cavity channel away from the connecting rod.

[0044] ​While the test platform assembly is slowly pushed back into the isolation test box 10 and the air cylinder assembly gradually contracts following the movable traction screw sleeve 219, the air inside the isolation test box 10 is sucked out by the drying unit connected to the first guide hose 204, and the air is continuously injected into the horizontal air cavity through the second guide hose 208 to drive the side clamps to move, so that the side clamps located on both sides of the speaker to be tested clamp the speaker to prevent the speaker from being displaced or shaken due to the vibration generated by the playback during the test. This ensures that the device can ensure the dryness of the speaker test environment while ensuring the stability of the speaker in a dry test environment, thereby further avoiding the distortion of the test results due to the change in the distance between the speaker and the microphone 402 in the test execution unit during the test, which helps to improve the accuracy of the speaker acoustic test results.

[0045] In the process of slowly pushing the test platform assembly back into the isolation test box 10, the movable horizontal top platform 210 drives the transmission gear 215 meshing with it to rotate through the tooth groove located below it. The rotating transmission gear 215 drives the bidirectional screw 218 to rotate while causing the two traction screw sleeves 219 to move in opposite directions, thereby causing the air cylinder assembly to gradually shrink as the traction screw sleeve 219 moves.

[0046] When gas is injected into the horizontal air channel, when the air pressure in the horizontal air channel exceeds a preset critical upper limit, the reciprocating piston 207 is pushed from the central narrowing channel into the upper conical chamber to relieve the high pressure in the horizontal air channel, thereby preventing the side clamps from squeezing and damaging the side walls of the speaker due to excessive air pressure in the horizontal air channel. As the air cylinder assembly gradually extends following the movable traction screw sleeve 219, the movable airtight piston 213 continuously extracts the gas in the horizontal air cavity through the second guide hose 208. When the end of the forcing piston 216 is against the end of the horizontal air cavity, the airtight piston 213 continues to move and drives the reciprocating piston 207 downward. When the reciprocating piston 207 enters the lower conical chamber through the narrowed channel in the middle, the external air is continuously sucked into the inner cavity of the passive air cylinder 212 through the second guide hose 208.

[0047] Reference Figure 2 、 Figure 3 、 Figure 5 as well as Figure 10 The embodiment of the present invention provides a speaker acoustic testing device, wherein the end cover structure further includes an extension end cover 201 that is disposed outside an opening on a side wall of the isolation test box 10 and is connected to the side wall of the isolation test box 10. A door 202 is hingedly connected to the end opening of the extension end cover 201, and the door 202 is connected to the extension end cover 201 via a lock. One end of the horizontal top platform 210 close to the storage door 202 extends out from the end opening of the extended end cover 201. The bottom surface of the horizontal top platform 210 is hermetically attached to the bottom wall of the end opening of the extended end cover 201, and the horizontal top platform 210 is detachably connected to the bottom of the storage door 202; After the storage door 202 is closed, the top surface of the horizontal top platform 210 is hermetically attached to the bottom of the storage door 202; The square bellows cover 209 is looped around the outer periphery of the side wall opening of the isolation test chamber 10, and one end of the square bellows cover 209 is connected to the side wall of the isolation test chamber 10, and the other end is connected to the inner cavity end of the extended end cover 201; The hollow strip base 203 is connected to the side wall of the extended end cover 201, and one end of the hollow strip base 203 close to the extended end cover 201 extends into the inner cavity of the extended end cover 201; The other end of the first diversion hose 204 respectively passes through the hollow base 211 and the side wall of the isolation test chamber 10 movably and is fixedly communicated with the side wall of the hollow strip base 203.

[0048] Refer to Figures 10 to 12 , an embodiment of the present invention provides an acoustic test device for a speaker. The drying unit further includes an embedded drying box 223 connected to the inner cavity of the strip-shaped housing 221. The inner cavity of the embedded drying box 223 is filled with a moisture-absorbing particle layer 225. The moisture-absorbing particles in the moisture-absorbing particle layer 225 are preferably made of a water-absorbing resin material; A baffle is hermetically connected to the end opening of the embedded drying box 223, and holes with an inner diameter smaller than the particle size of the moisture-absorbing particles in the moisture-absorbing particle layer 225 are provided on the baffle; A dust removal net 224 is further connected to the inner cavity of the embedded drying box 223, and the mesh size of the dust removal net 224 is smaller than the particle size of the moisture-absorbing particles in the moisture-absorbing particle layer 225; A narrowing cavity communicating with the inner cavity of the embedded drying box 223 is further provided inside the embedded drying box 223, and the dust removal net 224 is located between the inner cavity of the embedded drying box 223 and the narrowing cavity; One end of the connecting pipeline 222 passes through the side wall of the strip-shaped housing 221 and is connected to the end of the embedded drying box 223, and the end of the connecting pipeline 222 extends into the embedded drying box 223 and is communicated with the narrowing cavity; The other end of the connecting pipeline 222 passes through the hinge in the square bellows cover 209 and is fixedly communicated with the bottom end of the hollow strip base 203; When the air cylinder assembly contracts, the airtight piston 213 continuously extracts the gas in the inner cavity of the hollow strip base 203 through the second diversion hose 208. During this process, the gas inside the isolation test chamber 10 is subjected to moisture absorption treatment by the moisture-absorbing particle layer 225 in the drying unit and then is inhaled into the inner cavity of the passive air cylinder 212 in the air cylinder assembly; The test execution unit includes an audio analyzer 401, a microphone 402, and a support frame 403. The bottom of the support frame 403 is connected to a base, and both the base and the audio analyzer 401 are detachably mounted on the top of the horizontal top platform 210. The material used to make the support frame 403 is the same as the material used to make the bent pipe of the cantilever bracket in a lazy bracket, that is, the support frame 403 is made of carbon steel material with strong plasticity. During the actual test process, the tester can adjust the height, angle, and direction of the microphone 402 through the support frame 403 according to the actual test needs, so that the microphone 402 can be aligned with the speaker of the speaker; The top of the support frame 403 is connected to a top seat, and the microphone 402 is detachably mounted on the top seat.

[0049] After placing the speaker to be tested on the horizontal top platform 210, the microphone 402 is aligned with the speaker of the speaker. During the test, the microphone 402 is used to capture the sound pressure signal output by the speaker, convert it into an electrical signal, and transmit it to the audio analyzer 401 for analysis and processing by the audio analyzer 401; By arranging the sound absorption component with sound absorption material inside in the inner wall of the V-shaped fold of the square bellows cover 209, it helps to multiply the sound absorption area. Then, the sound absorption material located inside the strip-shaped outer shell 221 absorbs the reflected sound formed after the speaker emits sound during the test process inside this test device, reduces environmental noise, makes the test signal more pure, and avoids the superposition of the reflected sound and the direct sound emitted by the speaker in the test environment, resulting in the distortion of the test signal of the test execution unit, and thus being unable to accurately reflect the true test result of the speaker, which helps to further improve the accuracy of the speaker acoustic test result; While this device conducts passive and active dehumidification and drying of the test environment to maintain the dryness of the test environment, it is also beneficial to maintain the dryness of the sound absorption material inside the strip-shaped outer shell 221. When the speaker is being tested, it can effectively ensure the dryness of the test environment, avoid the situation where the speaker acoustic test result is distorted due to the influence of moisture in the environment, and at the same time, it can effectively avoid the situation where the pores of the sound absorption material are filled with water after absorbing water in the pores due to moisture, thereby reducing the sound absorption coefficient, effectively ensuring the accuracy of the speaker acoustic test result.

[0050] Example 2. The difference between this example and Example 1 is: Refer to Figure 2 、 Figure 5 、 Figure 6 and Figure 10 , The present invention provides an acoustic test device for a speaker. An acoustic absorption board 30 made of acoustic absorption material is also connected inside the isolation test chamber 10.

[0051] By isolating the sound-absorbing board 30 added inside the test chamber 10, it helps to further improve the absorption effect of the reflected sound formed after the sound emitted by the speaker during the internal test process of this test device.

[0052] Among them, the detachable installation connection methods in this article include but are not limited to: threaded connection and snap connection.

[0053] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than limiting it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An acoustic testing device for a speaker, characterized in that: It includes an isolation test chamber, and an end cover structure is connected to the opening on the side wall of the isolation test chamber; Inside the isolation test chamber, there is a detection unit that cooperates with the end cover structure. The detection unit includes a base component and a test platform component slidably connected to the top of the base component; The test platform component includes rows of tooth grooves and two vertically framed components symmetrically arranged on the left and right. Each vertically framed component includes a horizontal air cavity, and a driving piston is hermetically slidable inside the horizontal air cavity. A side clamping member is provided on the driving piston; The base component includes a gear component. The gear component includes a bidirectional screw rod rotatably connected inside the base component. A transmission gear meshing with the tooth grooves is sleeved on the outer periphery of the bidirectional screw rod. Two traction nuts arranged symmetrically left and right are threadedly connected to the bidirectional screw rod. An air cylinder component that can be telescopically movable is provided on each traction nut, and one end of the air cylinder component away from the traction nut is connected to the inner wall of the base component. The air cylinder component includes a first diversion hose and a second diversion hose; The end cover structure includes a hollow strip base and a square bellows inside it. Sound-absorbing components are provided on the inner walls of several V-shaped folds in the square bellows. The sound-absorbing components include a strip-shaped outer shell body with holes on its surface. A drying unit is provided inside the strip-shaped outer shell body. The drying unit includes a connecting pipeline, and the inner cavity of the drying unit is connected to the inner cavity of the hollow strip base through the connecting pipeline. Sound-absorbing materials are also filled inside the strip-shaped outer shell body; One end of the second diversion hose away from the air cylinder component is connected to the horizontal air cavity, and one end of the first diversion hose away from the air cylinder component is connected to the inner cavity of the hollow strip base; When the pulled-out test platform component is continuously pushed back into the isolation test chamber, and the test platform component drives the gear component to rotate through the tooth grooves, causing the air cylinder components following the traction nuts to gradually contract, while the contracting air cylinder components inject gas into the horizontal air cavity through the second diversion hose, they also suck the gas inside the isolation test chamber through the drying unit connected to the first diversion hose.

2. The speaker acoustic testing device according to claim 1, wherein: The base component further includes a hollow base connected to the bottom wall of the inner cavity of the isolation test chamber; The bidirectional screw rod in the gear component is rotatably connected to the opening at the top of the hollow base; 3. The speaker acoustic testing device according to claim 2, wherein: The test platform component further includes a test execution unit and a horizontal top platform; The horizontal top platform slides horizontally on the top of the hollow base, and the tooth grooves are arranged at the bottom of the horizontal top platform and mesh with the transmission gear in the gear component; 4. The speaker acoustic testing device according to claim 1, characterized in that: The vertically framed component further includes a rigid pipeline and an L-shaped side frame connected to the side wall of the horizontal top platform. The horizontal air cavity is arranged inside the L-shaped side frame; The rigid pipeline is fixedly connected to the side wall of the second diversion hose; One end of the rigid pipeline away from the second diversion hose is connected to an air balance cylinder base. An upper frustum chamber is opened at the top of the air balance cylinder base. A middle narrowing channel and a lower frustum chamber are respectively provided inside the air balance cylinder base. The middle narrowing channel is located between the upper frustum chamber and the lower frustum chamber. The rigid pipeline extends into the air balance cylinder base and is connected to one end of the lower frustum chamber away from the middle narrowing channel, and the upper frustum chamber is connected to the lower frustum chamber through the middle narrowing channel; A reciprocating piston seals and slides within a narrowing channel in the middle. A guide rod is hermetically and slidably inserted at the bottom end of the air balance cylinder seat. A limit block is connected to the bottom end of the guide rod. The top end of the guide rod extends into the lower frustum chamber and is connected to the reciprocating piston. A return spring is also sleeved outside the guide rod and is connected between the lower frustum chamber and the reciprocating piston.

5. The speaker acoustic testing device according to claim 4, wherein: The side clamp includes a connecting rod connected to the actuating piston. One end of the connecting rod away from the actuating piston hermetically passes through the end of the L-shaped side frame and is connected to a clamping seat. An anti-slip gasket is also connected to one side of the clamping seat away from the connecting rod.

6. The speaker acoustic testing device according to claim 1, wherein: The air cylinder assembly further includes a passive air cylinder connected to the traction screw sleeve and horizontally sliding within the inner cavity of the hollow base. A fixed plug rod is hermetically and slidably inserted at the end of the passive air cylinder. An airtight piston seals and slides within the inner cavity of the passive air cylinder. One end of the fixed plug rod extends into the inner cavity of the passive air cylinder and is connected to the airtight piston, and the other end is connected to the inner cavity side wall of the hollow base. One end of the first diversion hose is fixedly communicated with one end of the passive air cylinder near the fixed plug rod. One end of the second diversion hose is fixedly communicated with one end of the passive air cylinder away from the fixed plug rod.

7. The speaker acoustic testing device according to claim 6, wherein: The other end of the second diversion hose is connected to the side wall of the L-shaped side frame and is communicated with one end of the horizontal air cavity away from the connecting rod.

8. The speaker acoustic testing device according to claim 3, wherein: The end cover structure further includes an extended end cover covering the outside of the side wall opening of the isolation test box and connected to the side wall of the isolation test box. A door is hinged at the opening of the end of the extended end cover, and the door is connected to the extended end cover through a lock. One end of the horizontal top platform near the door extends out from the opening of the end of the extended end cover. The bottom surface of the horizontal top platform is hermetically attached to the bottom wall of the opening of the end of the extended end cover, and the horizontal top platform is detachably connected to the bottom of the door. When the door is closed, the top surface of the horizontal top platform is hermetically attached to the bottom of the door. The square bellows is looped around the outer periphery of the side wall opening of the isolation test box. One end of the square bellows is connected to the side wall of the isolation test box, and the other end is connected to the inner cavity end of the extended end cover. The hollow strip seat is connected to the side wall of the extended end cover, and one end of the hollow strip seat near the extended end cover extends into the inner cavity of the extended end cover. The other end of the first diversion hose respectively passes through the hollow base and the side wall of the isolation test box and is fixedly communicated with the side wall of the hollow strip seat.

9. The speaker acoustic testing device according to claim 8, characterized in that: The drying unit further includes an embedded drying box connected within the inner cavity of the strip-shaped housing. A moisture-absorbing particle layer is filled within the inner cavity of the embedded drying box. A baffle is cover-connected at the opening of the end of the embedded drying box, and holes with an inner diameter smaller than the particle size of the moisture-absorbing particles in the moisture-absorbing particle layer are provided on the baffle. A dust removal net is also connected within the inner cavity of the embedded drying box. A narrowing cavity communicating with the inner cavity of the embedded drying box is further provided inside the embedded drying box, and the dust removal net is located between the inner cavity of the embedded drying box and the narrowing cavity. One end of the connecting pipeline passes through the side wall of the strip-shaped housing and is connected to the end of the embedded drying box, and the end of the connecting pipeline extends into the inside of the embedded drying box and is communicated with the narrowing cavity. The other end of the connecting pipeline passes through the hinge in the square bellows and is fixedly communicated with the bottom end of the hollow strip seat. The test execution unit includes an audio analyzer, a microphone, and a support frame. The bottom of the support frame is connected to a base, and both the base and the audio analyzer are detachably mounted on the top of a horizontal top platform; The top of the support frame is connected to a top seat, and the microphone is detachably mounted on the top seat.

10. The speaker acoustic testing device according to claim 1, wherein: An acoustic absorption panel made of acoustic absorption material is also connected inside the isolation test chamber.

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