Speaker acoustic testing device

Abstract

The present invention discloses a speaker acoustic test device, which belongs to the technical field of acoustic test equipment, and includes an isolation test box, wherein an end cover structure is connected to the side wall opening of the isolation test box; and a detection unit that cooperates with the end cover structure is provided inside the isolation test box. Passive dehumidification treatment of the environment inside the device in a closed state is achieved through the drying component in the end cover structure. When the door in 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, and then the door is closed and the test platform component is slowly pushed back into the isolation test box. The test platform component rotates through the tooth groove driving gear assembly, so that the air cylinder assembly that follows the movement of the traction screw sleeve gradually shrinks. The shrinking air cylinder assembly continuously draws the gas inside the isolation test box back into the inside through the first guide hose after passing through the drying unit, thereby achieving active dehumidification and drying treatment of the test environment.

Description

Technical Field

[0001] The present invention relates to the technical field of acoustic testing equipment, and more particularly to a speaker acoustic testing device. Background Art

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

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

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

[0005] In view of this, we propose a speaker acoustic testing device. Summary of the Invention

[0006] Technical problem to be solved: The purpose of the present invention is to provide a speaker acoustic testing device that solves the technical problems raised in the above background technology.

[0007] Technical solution: The technical solution of the present invention provides a speaker acoustic testing device, comprising an isolation test box, wherein an end cover structure is connected to the side wall opening of the isolation test box;

[0008] A detection unit is provided inside the isolation test box and 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.

[0009] The test platform assembly includes tooth grooves arranged in a row and two vertical frame assemblies symmetrically arranged on the left and right. The vertical frame assembly includes a horizontal air cavity channel. A forcing piston is sealed and slidable in the horizontal air cavity channel. The forcing piston is provided with a side clamp;

[0010] The base assembly includes a gear assembly, which includes a bidirectional screw rotatably connected to the interior of the base assembly, a transmission gear meshing with the tooth groove is sleeved on the outer periphery of the bidirectional screw, and two symmetrically arranged traction screw sleeves are threadedly connected to the bidirectional screw. Each traction screw sleeve is provided with a movable and retractable air cylinder assembly, and the end of the air cylinder assembly away from the traction screw sleeve is connected to the inner wall of the base assembly. The air cylinder assembly includes a first guide hose and a second guide hose;

[0011] The end cover structure includes a hollow bar seat and a square accordion cover located inside the hollow bar seat. The inner walls of several V-shaped folds in the square accordion cover are provided with sound-absorbing components. The sound-absorbing components include a strip-shaped outer shell with holes on the surface. A drying unit is provided inside the strip-shaped outer shell. The drying unit includes a connecting pipe, and the inner cavity of the drying unit is connected to the inner cavity of the hollow bar seat through the connecting pipe. The inner cavity of the strip-shaped outer shell is also filled with sound-absorbing material.

[0012] One end of the second guiding hose away from the air cylinder assembly is connected to the horizontal air cavity, and one end of the first guiding hose away from the air cylinder assembly is connected to the inner cavity of the hollow bar seat;

[0013] When the pulled-out test platform assembly is continuously pushed back into the isolation test box, and the test platform assembly drives the gear assembly to rotate through the tooth groove, causing the air cylinder assembly that follows the movement of the traction screw sleeve to gradually shrink, the shrinking air cylinder assembly injects gas into the horizontal air cavity through the second guide hose, while also sucking the gas inside the isolation test box through the drying unit connected to the first guide hose.

[0014] As an optional solution of the technical solution of the present invention, the base assembly further includes a hollow base connected to the bottom wall of the inner cavity of the isolation test box;

[0015] The bidirectional screw in the gear assembly is rotatably connected to the top opening of the hollow base.

[0016] As an optional solution of the technical solution of the present invention, the test platform component also includes a test execution unit and a horizontal top platform;

[0017] The horizontal top platform slides horizontally on the top of the hollow base platform, and the tooth groove is arranged at the bottom of the horizontal top platform and meshes with the transmission gear in the gear assembly.

[0018] As an optional solution of the technical solution of the present invention, the stand assembly further includes a hard pipe and an L-shaped side frame connected to the side wall of the horizontal top platform, and the horizontal air cavity is arranged inside the L-shaped side frame;

[0019] The hard pipeline is fixedly connected to the side wall of the second diversion hose;

[0020] An air balancing cylinder seat is connected to the end of the hard pipe away from the second guide hose. An upper conical chamber is provided on the top of the air balancing cylinder seat. A middle narrowing channel and a lower conical chamber are provided inside the air balancing cylinder seat. The middle narrowing channel is located between the upper conical chamber and the lower conical chamber. The hard pipe extends into the interior of the air balancing cylinder seat and is connected to the end of the lower conical chamber away from the middle narrowing channel. The upper conical chamber is connected to the lower conical chamber through the middle narrowing channel.

[0021] A reciprocating piston is sealed and slidably arranged in the narrow channel in the middle, a guide rod is sealed and slidably inserted into the bottom end of the gas balance cylinder seat, the bottom end of the guide rod is connected to a limit block, and the top end of the guide rod extends into the lower truncated cone chamber and is connected to the reciprocating piston;

[0022] A return spring connected between the lower cone chamber and the reciprocating piston is also sleeved on the guide rod.

[0023] As an optional solution to the technical solution of the document of the present invention, the side clamp includes a connecting rod connected to the forcing piston, and the end of the connecting rod away from the forcing piston is sealed through the end of the L-shaped side frame and connected to a clamping seat, and the side of the clamping seat away from the connecting rod is also connected to an anti-slip gasket.

[0024] As an optional solution of the technical solution of the present invention, the air cylinder assembly also includes a passive air cylinder connected to the traction screw sleeve and sliding horizontally in the inner cavity of the hollow base, and a fixed plug rod is inserted into the end of the passive air cylinder in a sealing and sliding manner;

[0025] An airtight piston is sealed and slidably mounted in the inner cavity of the passive cylinder, and one end of the fixed plug rod extends into the inner cavity of the passive cylinder and is connected to the airtight piston, while the other end is connected to the side wall of the inner cavity of the hollow base;

[0026] One end of the first guiding hose is fixedly connected to one end of the passive air cylinder close to the fixed plug rod, and one end of the second guiding hose is fixedly connected to one end of the passive air cylinder away from the fixed plug rod.

[0027] As an optional solution of the technical solution of the present invention, the other end of the second guide hose is connected to the side wall of the L-shaped side frame and is connected to the end of the horizontal air cavity away from the connecting rod.

[0028] As an optional solution of the technical solution of the present invention, the end cover structure also includes an extended end cover that is arranged outside the opening of the side wall of the isolation test box and is connected to the side wall of the isolation test box. A door is hinged at the end opening of the extended end cover, and the door is connected to the extended end cover by a lock;

[0029] One end of the horizontal top platform close to the warehouse door extends out from the end opening of the extended end cover, the bottom surface of the horizontal top platform is sealed and attached to the bottom wall of the end opening of the extended end cover, and the horizontal top platform is detachably connected to the bottom of the warehouse door;

[0030] When the door is closed, the top surface of the horizontal platform is sealed against the bottom of the door;

[0031] A square accordion cover is arranged around the outer periphery of the side wall opening of the isolation test box, and one end of the square accordion cover is connected to the side wall of the isolation test box, and the other end is connected to the end of the inner cavity of the extension end cover;

[0032] 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;

[0033] The other end of the first guiding hose is movable through the hollow base and the side wall of the isolation test box and is fixedly connected to the side wall of the hollow bar seat.

[0034] As an optional solution of the technical solution of the present invention, the drying unit further includes an embedded drying box connected to the inner cavity of the strip-shaped outer shell, the inner cavity of the embedded drying box is filled with a hygroscopic particle layer, and the end opening of the embedded drying box is covered with a blocking cover, and the blocking cover is provided with holes having an inner diameter smaller than the particle size of the hygroscopic particles in the hygroscopic particle layer;

[0035] A dust removal net is also connected to the inner cavity of the built-in drying box;

[0036] The built-in drying box is further provided with a narrowing cavity which is in communication with the inner cavity of the built-in drying box, and the dust removal net is located between the inner cavity of the built-in drying box and the narrowing cavity;

[0037] One end of the connecting pipe passes through the side wall of the strip-shaped outer shell and is connected to the end of the embedded drying box, and the end of the connecting pipe extends into the interior of the embedded drying box and communicates with the narrowed cavity;

[0038] The other end of the connecting pipe passes through the hinge in the square accordion cover and is fixedly connected to the bottom end of the hollow bar seat;

[0039] 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 the base and the audio analyzer can be detachably mounted on the top of the horizontal top platform.

[0040] The top of the support frame is connected with a top seat, and the microphone is detachably mounted on the top seat.

[0041] As an optional solution of the technical solution of the present invention, a sound absorbing panel made of sound absorbing material is further connected to the inner cavity of the isolation test box.

[0042] 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 is carried out, the environment inside the device in a closed state is passively dehumidified through the drying component in the end cover structure. When the compartment door in the end cover structure is opened, the speaker to be tested is placed on the top surface of the test platform assembly pulled out from the inside of the isolation test box, and then the compartment door is closed and the test platform assembly is slowly pushed back into the isolation test box. The test platform assembly rotates through the tooth groove driving gear assembly, so that the air cylinder assembly that follows the movement of the traction screw sleeve gradually shrinks. The shrinking air cylinder assembly sucks the gas inside the isolation test box through the drying unit connected to the first guide hose, thereby realizing active dehumidification and drying treatment of the test environment, effectively avoiding the distortion of the speaker acoustic test results due to the influence of moisture in the environment.

[0043] 2. When the test platform assembly is slowly pushed back into the isolation test box and the air cylinder assembly gradually contracts following the moving traction screw sleeve, the air inside the isolation test box is sucked out through the drying unit connected to the first guide hose, and the air is continuously injected into the horizontal air cavity through the second guide hose to drive the side clamps to move, so that the side clamps 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 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 in the test execution unit during the test, which helps to improve the accuracy of the speaker acoustic test results.

[0044] 3. By arranging a sound-absorbing component with sound-absorbing material inside on the inner wall of the V-shaped fold in the square accordion cover, the sound absorption area is multiplied. The sound-absorbing material located inside the strip-shaped outer shell absorbs the reflected sound generated after the sound emitted by the speaker during the test process inside this test device, reducing environmental noise, making the test signal purer, and avoiding the superposition of reflected sound and direct sound emitted by the speaker in the test environment, which causes distortion of the test signal of the test execution unit and fails to accurately reflect the actual test results of the speaker, thereby helping to further improve the accuracy of the speaker acoustic test results.

[0045] 4. This device not only passively and actively dehumidifies and dries the test environment, but also helps to keep the sound-absorbing material inside the strip-shaped outer shell dry. This effectively ensures the dryness of the test environment during speaker testing, preventing distortion of the speaker acoustic test results due to moisture in the environment. It also effectively prevents the sound-absorbing material from absorbing moisture in its pores due to moisture, causing the pores to be filled with water and thereby reducing the sound absorption coefficient, thereby effectively ensuring the accuracy of the speaker acoustic test results. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0047] Figure 2 Schematic diagram of the internal structure of the isolation test box in the present invention.

[0048] Figure 3 For the present invention Figure 2 A partial enlarged schematic diagram of part A.

[0049] Figure 4 For the present invention Figure 2 A partial enlarged schematic diagram of part B.

[0050] Figure 5 Schematic diagram of the internal structure of the end cover structure of the present invention.

[0051] Figure 6 For the present invention Figure 2 Sectional view of plane AA.

[0052] Figure 7 It is a cross-sectional view of the detection unit in the present invention.

[0053] Figure 8 For the present invention Figure 7 A partial enlarged schematic diagram of part C in the middle.

[0054] Figure 9 For the present invention Figure 7 A partial enlarged schematic diagram of part D in the middle.

[0055] Figure 10 For the present invention Figure 2 Cross-sectional view of the middle BB plane.

[0056] Figure 11 For the present invention Figure 10 A partial enlarged schematic diagram of part E in the middle.

[0057] Figure 12 For the present invention Figure 11 A partial enlarged schematic diagram of part F in the middle.

[0058] Description of the numbers in the figure:

[0059] 10. Isolation test box;

[0060] 201. Extended end cover; 202. Warehouse door; 203. Hollow strip seat; 204. First diversion hose; 205. L-shaped side frame; 206. Gas balance cylinder seat; 207. Reciprocating piston; 208. Second diversion hose; 209. Square accordion cover; 210. Horizontal top platform; 211. Hollow base platform; 212. Passive gas cylinder; 213. Airtight piston; 214. Fixed plug rod; 215. Transmission gear; 216. Forcing piston; 217. Clamping seat; 218. Bidirectional screw; 219. Draw screw sleeve; 220. Return spring; 221. Strip outer shell; 222. Connecting pipeline; 223. Embedded drying box; 224. Dust removal net; 225. Hygroscopic particle layer;

[0061] 30. Sound-absorbing panels;

[0062] 401. Audio analyzer; 402. Microphone; 403. Support stand. DETAILED DESCRIPTION

[0063] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0064] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying 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 operate in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0065] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to mechanical connections or connections; they may refer to direct connections or indirect connections through an intermediate medium; and they may refer to internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0066] Example 1, with reference to Figures 1 to 11 , an embodiment of the present invention provides a speaker acoustic testing device, comprising an isolation test box 10, wherein an end cover structure is connected to an opening of a side wall of the isolation test box 10;

[0067] The isolation test box 10 is provided with 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.

[0068] The test platform assembly includes tooth grooves arranged in a row and two vertical frame assemblies symmetrically arranged on the left and right. The vertical frame assembly includes a horizontal air cavity channel. A forcing piston 216 is sealed and slidable in the horizontal air cavity channel. The forcing piston 216 is provided with a side clamp.

[0069] The base assembly includes a gear assembly, which includes a bidirectional screw 218 rotatably connected to the interior of the base assembly. The outer periphery of the bidirectional screw 218 is sleeved with a transmission gear 215 meshing with the tooth groove. The bidirectional screw 218 is threadedly connected to two symmetrically arranged traction screw sleeves 219. Each traction screw sleeve 219 is provided with a movable and retractable air cylinder assembly, and the end of the air cylinder assembly away from the traction screw sleeve 219 is connected to the inner wall of the base assembly. The air cylinder assembly includes a first guide hose 204 and a second guide hose 208.

[0070] The end cap structure includes a hollow bar seat 203 and a square accordion cover 209 located therein. A sound-absorbing component is provided on the inner wall of several V-shaped folds in the square accordion cover 209. The sound-absorbing component includes a strip-shaped outer shell 221 with holes formed on its surface. A drying unit is provided inside the strip-shaped outer shell 221. The drying unit includes a connecting pipe 222, and the inner cavity of the drying unit is connected to the inner cavity of the hollow bar seat 203 through the connecting pipe 222. The interior of the strip-shaped outer shell 221 is also filled with sound-absorbing material.

[0071] One end of the second guiding hose 208 away from the air cylinder assembly is connected to the horizontal air cavity, and one end of the first guiding hose 204 away from the air cylinder assembly is connected to the inner cavity of the hollow bar seat 203;

[0072] When the pulled-out test platform assembly is continuously pushed back into the isolation test box 10, and the test platform assembly drives the gear assembly to rotate through the tooth groove, so that the air cylinder assembly that follows the movement of the traction screw sleeve 219 gradually shrinks, the shrinking air cylinder assembly injects gas into the horizontal air cavity through the second guide hose 208, while sucking the gas inside the isolation test box 10 through the drying unit connected to the first guide hose 204.

[0073] Before conducting an acoustic test on the speaker, the environment inside the closed device is passively dehumidified through the drying component in the end cover structure. When the compartment door 202 in 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 10, and then the compartment door 202 is closed and the test platform component is slowly pushed back into the isolation test box 10. The test platform component rotates through the tooth groove driving gear assembly, so that the air cylinder assembly that follows the movement of the traction screw sleeve 219 gradually shrinks. The shrinking air cylinder assembly sucks the gas inside the isolation test box 10 through the drying unit connected to the first guide hose 204, thereby realizing active dehumidification and drying of the test environment, effectively avoiding the distortion of the speaker acoustic test results due to the influence of moisture in the environment.

[0074] Reference Figure 6 and Figure 7 , an embodiment of the present invention provides a speaker acoustic testing device, wherein the base assembly further comprises a hollow base 211 connected to the bottom wall of the inner cavity of the isolation test box 10;

[0075] The bidirectional screw 218 in the gear assembly is rotatably connected to the top opening of the hollow base 211 .

[0076] Reference Figure 2 , Figures 5 to 7 , Figure 10 , an embodiment of the present invention provides a speaker acoustic testing device, the test platform assembly further includes a test execution unit and a horizontal top platform 210;

[0077] The horizontal top platform 210 slides horizontally on the top of the hollow base 211 , and a tooth groove is provided at the bottom of the horizontal top platform 210 and meshes with the transmission gear 215 in the gear assembly.

[0078] Reference Figure 2 、 Figure 4 、 Figure 6 、 Figure 7 and Figure 9 The embodiment of the present invention provides a speaker acoustic testing device, wherein the stand assembly further includes a hard pipe and an L-shaped side frame 205 connected to the side wall of the horizontal top platform 210, and the horizontal air cavity is provided inside the L-shaped side frame 205;

[0079] The hard pipe is fixedly connected to the side wall of the second diversion hose 208;

[0080] The end of the rigid pipe away from the second guide hose 208 is connected to the gas balancing cylinder seat 206. The top of the gas balancing cylinder seat 206 is provided with an upper conical chamber. The gas balancing cylinder seat 206 also has a central narrowing channel and a lower conical chamber inside. The central narrowing channel is located between the upper and lower conical chambers. The rigid pipe extends into the gas balancing cylinder seat 206 and is connected to the end of the lower conical chamber away from the central narrowing channel. The upper conical chamber is connected to the lower conical chamber through the central narrowing channel.

[0081] A reciprocating piston 207 is sealed and slidably provided in the narrowed channel in the middle. A guide rod is inserted and sealed and slidably provided at the bottom end of the gas balance cylinder seat 206. The bottom end of the guide rod is connected to a limit block, and the top end of the guide rod extends into the lower cone chamber and is connected to the reciprocating piston 207.

[0082] A return spring 220 is also sleeved on the guide rod and connected between the lower cone chamber and the reciprocating piston 207.

[0083] Reference Figure 6 、 Figure 7 and Figure 9 An embodiment of the present invention provides a speaker acoustic testing device, wherein the side clamp includes a connecting rod connected to the forcing piston 216, and the end of the connecting rod away from the forcing piston 216 is sealed through the end of the L-shaped side frame 205 and is connected to a clamping seat 217, and the side of the clamping seat 217 away from the connecting rod is also connected to an anti-slip gasket.

[0084] Reference Figure 6 、 Figure 7 and Figure 10 The embodiment of the present invention provides a speaker acoustic testing device, wherein the air cylinder assembly further comprises a passive air cylinder 212 connected to a traction screw 219 and sliding horizontally within an inner cavity of a hollow base 211, and a fixed plug rod 214 is inserted into the end of the passive air cylinder 212 in a sealed and sliding manner;

[0085] An airtight piston 213 is sealed and slidably mounted in the inner cavity of the passive air cylinder 212. One end of a fixed plug rod 214 extends into the inner cavity of the passive air cylinder 212 and is connected to the airtight piston 213. The other end is connected to the inner wall of the hollow base 211.

[0086] One end of the first guiding hose 204 is fixedly connected to one end of the passive air cylinder 212 close to the fixed plug rod 214 , and one end of the second guiding hose 208 is fixedly connected to one end of the passive air cylinder 212 away from the fixed plug rod 214 ;

[0087] The other end of the second guiding hose 208 is connected to the side wall of the L-shaped side frame 205 and is communicated with the end of the horizontal air cavity away from the connecting rod.

[0088] 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.

[0089] 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.

[0090] 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.

[0091] 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.

[0092] 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.

[0093] One end of the horizontal top platform 210 near the door 202 extends out from the end opening of the extended end cover 201. The bottom surface of the horizontal top platform 210 is sealed against the bottom wall of the end opening of the extended end cover 201. The horizontal top platform 210 is detachably connected to the bottom of the door 202.

[0094] When the door 202 is closed, the top surface of the horizontal platform 210 is sealed against the bottom of the door 202;

[0095] The square accordion cover 209 is disposed around the outer periphery of the side wall opening of the isolation test box 10, and one end of the square accordion cover 209 is connected to the side wall of the isolation test box 10, and the other end is connected to the end of the inner cavity of the extension end cover 201;

[0096] The hollow bar seat 203 is connected to the side wall of the extension end cover 201, and one end of the hollow bar seat 203 close to the extension end cover 201 extends into the inner cavity of the extension end cover 201;

[0097] The other end of the first guiding hose 204 is movable through the hollow base 211 and the side wall of the isolation test box 10 and is fixedly connected to the side wall of the hollow bar seat 203 .

[0098] Reference Figures 10 to 12 The embodiment of the present invention provides a speaker acoustic testing device, wherein the drying unit further comprises an embedded drying box 223 connected to the inner cavity of the strip-shaped outer shell 221, the inner cavity of the embedded drying box 223 is filled with a hygroscopic particle layer 225, and the hygroscopic particles in the hygroscopic particle layer 225 are preferably made of a water-absorbing resin material;

[0099] The end opening of the embedded drying box 223 is covered with a blocking cover, which is provided with holes with an inner diameter smaller than the size of the hygroscopic particles in the hygroscopic particle layer 225;

[0100] A dust removal net 224 is also connected to the inner cavity of the embedded drying box 223. The mesh size of the dust removal net 224 is smaller than the particle size of the hygroscopic particles in the hygroscopic particle layer 225.

[0101] The built-in drying box 223 is further provided with a narrowing cavity in communication with the inner cavity of the built-in drying box 223 , and the dust removal net 224 is located between the inner cavity of the built-in drying box 223 and the narrowing cavity;

[0102] One end of the connecting pipe 222 passes through the side wall of the strip-shaped outer shell 221 and is connected to the end of the embedded drying box 223. The end of the connecting pipe 222 extends into the interior of the embedded drying box 223 and communicates with the narrowed cavity.

[0103] The other end of the connecting pipe 222 passes through the hinge in the square accordion cover 209 and is fixedly connected to the bottom end of the hollow bar seat 203;

[0104] When the air cylinder assembly contracts, the airtight piston 213 continuously draws out the air from the hollow bar seat 203 through the second guide hose 208. During this process, the air inside the isolated test chamber 10 is absorbed by the hygroscopic particle layer 225 in the drying unit and then drawn into the inner cavity of the passive air cylinder 212 in the air cylinder assembly.

[0105] 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 the base and the audio analyzer 401 are both 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 curved pipe of the cantilever bracket in the lazy stand, that is, the support frame 403 is made of carbon steel 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 sound box;

[0106] The top of the support frame 403 is connected to a top seat, and the microphone 402 is detachably mounted on the top seat.

[0107] After placing the speaker to be tested on the horizontal top table 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;

[0108] By arranging a sound-absorbing component with sound-absorbing material inside on the inner wall of the V-shaped fold in the square accordion cover 209, the sound absorption area is multiplied. The sound-absorbing material inside the strip-shaped outer shell 221 absorbs the reflected sound generated after the sound emitted by the speaker during the test process inside the test device, reducing environmental noise, making the test signal purer, and avoiding the superposition of reflected sound and direct sound emitted by the speaker in the test environment, which would cause distortion of the test signal of the test execution unit and thus fail to accurately reflect the actual test results of the speaker, thereby helping to further improve the accuracy of the speaker acoustic test results.

[0109] This device not only passively and actively dehumidifies and dries the test environment to keep it dry, but also helps to keep the sound-absorbing material inside the strip-shaped outer shell 221 dry, so that when the speaker is tested, the dryness of the test environment can be effectively guaranteed, and the distortion of the speaker acoustic test results due to the influence of moisture in the environment can be avoided. At the same time, it can also effectively prevent the sound-absorbing material from absorbing moisture in its pores due to moisture, causing the pores to be filled with water, thereby reducing the sound absorption coefficient, effectively ensuring the accuracy of the speaker acoustic test results.

[0110] Example 2, the difference between this example and Example 1 is: Figure 2 、 Figure 5 、 Figure 6 as well as Figure 10 The embodiment of the present invention provides a speaker acoustic testing device, wherein a sound absorbing panel 30 made of sound absorbing material is connected to the inner cavity of the isolation test box 10 .

[0111] The sound absorbing panel 30 added to the interior of the isolating test box 10 helps to further improve the absorption effect of the reflected sound generated by the sound emitted by the speaker during the test process inside the test device.

[0112] The detachable installation connection methods herein include but are not limited to: threaded connection and snap connection.

[0113] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A speaker acoustic testing device, characterized by: The isolation test box comprises an isolation test box, wherein an end cover structure is connected to an opening of a side wall of the isolation test box; A detection unit cooperating with the end cover structure is provided inside the isolation test box, and 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 tooth grooves arranged in a row and two vertical frame assemblies symmetrically arranged on the left and right sides. The vertical frame assembly includes a horizontal air cavity channel, a forcing piston is sealed and slidable in the horizontal air cavity channel, and a side clamp is provided on the forcing piston; The base assembly includes a gear assembly, which includes a bidirectional screw rotatably connected to the interior of the base assembly, a transmission gear meshing with the tooth groove is sleeved on the outer periphery of the bidirectional screw, and two symmetrically arranged traction screw sleeves are threadedly connected to the bidirectional screw, each traction screw sleeve is provided with a movable and retractable air cylinder assembly, and the end of the air cylinder assembly away from the traction screw sleeve is connected to the inner wall of the base assembly, and the air cylinder assembly includes a first guide hose and a second guide hose; The end cover structure includes a hollow bar seat and a square accordion cover located inside the end cover. A sound-absorbing component is provided on the inner wall of several V-shaped folds in the square accordion cover. The sound-absorbing component includes a strip-shaped outer shell with holes on the surface. A drying unit is provided inside the strip-shaped outer shell. The drying unit includes a connecting pipe, and the inner cavity of the drying unit is connected to the inner cavity of the hollow bar seat through the connecting pipe. The inner cavity of the strip-shaped outer shell is also filled with sound-absorbing material. One end of the second guiding hose away from the air cylinder assembly is connected to the horizontal air cavity, and one end of the first guiding hose away from the air cylinder assembly is connected to the inner cavity of the hollow bar seat; When the pulled-out test platform assembly is continuously pushed back into the isolation test box, and the test platform assembly drives the gear assembly to rotate through the tooth groove, causing the air cylinder assembly that follows the movement of the traction screw sleeve to gradually shrink, the shrinking air cylinder assembly injects gas into the horizontal air cavity through the second guide hose, while also sucking the gas inside the isolation test box through the drying unit connected to the first guide hose.

2. The speaker acoustic testing device according to claim 1, characterized in that: The base assembly also includes a hollow base connected to the bottom wall of the inner cavity of the isolation test box; The bidirectional screw in the gear assembly is rotatably connected to the top opening of the hollow base.

3. The speaker acoustic testing device according to claim 2, wherein: The test platform assembly also includes a test execution unit and a horizontal top platform; The horizontal top platform slides horizontally on the top of the hollow base platform, and the tooth groove is arranged at the bottom of the horizontal top platform and meshes with the transmission gear in the gear assembly.

4. The speaker acoustic testing device according to claim 1, wherein: The vertical frame assembly also includes a hard pipe and an L-shaped side frame connected to the side wall of the horizontal top platform, and the horizontal air cavity is arranged inside the L-shaped side frame; The hard pipeline is fixedly connected to the side wall of the second guiding hose; An air balancing cylinder seat is connected to one end of the hard pipe away from the second guide hose. An upper conical chamber is provided on the top of the air balancing cylinder seat. A middle narrowing channel and a lower conical chamber are provided inside the air balancing cylinder seat. The middle narrowing channel is located between the upper conical chamber and the lower conical chamber. The hard pipe extends into the interior of the air balancing cylinder seat and is connected to one end of the lower conical chamber away from the middle narrowing channel. The upper conical chamber is connected to the lower conical chamber through the middle narrowing channel. A reciprocating piston is sealed and slidably arranged in the narrow channel in the middle, a guide rod is sealed and slidably inserted into the bottom end of the gas balance cylinder seat, the bottom end of the guide rod is connected to a limit block, and the top end of the guide rod extends into the lower truncated cone chamber and is connected to the reciprocating piston; A return spring connected between the lower cone chamber and the reciprocating piston is also sleeved on the guide rod.

5. The speaker acoustic testing device according to claim 4, characterized in that: The side clamp includes a connecting rod connected to the forcing piston, and the end of the connecting rod away from the forcing piston is sealed through the end of the L-shaped side frame and connected to a clamping seat, and the side of the clamping seat away from the connecting rod is also connected to an anti-slip gasket.

6. The speaker acoustic testing device according to claim 1, characterized in that: The air cylinder assembly also includes a passive air cylinder connected to the traction screw sleeve and sliding horizontally in the inner cavity of the hollow base, and a fixed plug rod is inserted into the end of the passive air cylinder in a sealing and sliding manner; An airtight piston is sealed and slidably installed in the inner cavity of the passive air cylinder, and one end of the fixed plug rod extends into the inner cavity of the passive air cylinder and is connected to the airtight piston, while the other end is connected to the side wall of the inner cavity of the hollow base; One end of the first guiding hose is fixedly connected to one end of the passive air cylinder close to the fixed plug rod, and one end of the second guiding hose is fixedly connected to one end of the passive air cylinder away from the fixed plug rod.

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

8. The speaker acoustic testing device according to claim 3, characterized in that: The end cover structure also includes an extension end cover that is disposed outside the opening of the side wall of the isolation test box and is connected to the side wall of the isolation test box. A door is hinged at the end opening of the extension end cover, and the door is connected to the extension end cover through a lock; One end of the horizontal top platform close to the warehouse door extends out from the end opening of the extended end cover, the bottom surface of the horizontal top platform is sealed and attached to the bottom wall of the end opening of the extended end cover, and the horizontal top platform is detachably connected to the bottom of the warehouse door; When the door is closed, the top surface of the horizontal platform is sealed against the bottom of the door; The square accordion cover is arranged around the outer periphery of the side wall opening of the isolation test box, and one end of the square accordion cover is connected to the side wall of the isolation test box, and the other end is connected to the end of the inner cavity 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 guiding hose is movable through the hollow base and the side wall of the isolation test box and is fixedly connected to the side wall of the hollow bar seat.

9. The speaker acoustic testing device according to claim 8, characterized in that: The drying unit further comprises an embedded drying box connected to the inner cavity of the strip-shaped outer shell, the inner cavity of the embedded drying box being filled with a hygroscopic particle layer, and a blocking cover being connected to the end opening of the embedded drying box, the blocking cover being provided with holes having an inner diameter smaller than the particle size of the hygroscopic particles in the hygroscopic particle layer; A dust removal net is also connected to the inner cavity of the built-in drying box; The built-in drying box is further provided with a narrowing cavity which is in communication with the inner cavity of the built-in drying box, and the dust removal net is located between the inner cavity of the built-in drying box and the narrowing cavity; One end of the connecting pipe passes through the side wall of the strip-shaped outer shell and is connected to the end of the embedded drying box, and the end of the connecting pipe extends into the interior of the embedded drying box and communicates with the narrowed cavity; The other end of the connecting pipe passes through the hinge in the square accordion cover and is fixedly connected to the bottom end of the hollow bar seat; The test execution unit includes an audio analyzer, a microphone, and a support frame, wherein the bottom of the support frame is connected to a base, and the base and the audio analyzer can be detachably mounted 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 mounted on the top seat.

10. The speaker acoustic testing device according to claim 1, characterized in that: A sound absorbing board made of sound absorbing material is also connected to the inner cavity of the isolation test box.

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