CN112839292A

CN112839292A - Acoustic testing box for single loudspeaker

Info

Publication number: CN112839292A
Application number: CN202110132955.2A
Authority: CN
Inventors: 罗英俊; 何亮; 覃宇
Original assignee: Zhuhai Bojay Electronics Co Ltd
Current assignee: Zhuhai Bojay Electronics Co Ltd
Priority date: 2021-02-01
Filing date: 2021-02-01
Publication date: 2021-05-25

Abstract

The invention aims to provide the single horn acoustic test box which is convenient to operate, has good sound insulation performance and can create a good test environment. The device comprises a lower box body and a sound-proof shield, wherein a test microphone is arranged in the lower box body, a sound-proof layer is arranged on the inner wall of the lower box body, the sound-proof shield is arranged on the lower box body through a lifting device, a product placing piece is arranged on the upper end surface of the lower box body and is positioned below the sound-proof shield, a test port communicated with the interior of the lower box body is arranged on the product placing piece, and the test port is matched with the test microphone. The invention is applied to the technical field of test boxes.

Description

Acoustic testing box for single loudspeaker

Technical Field

The invention relates to the technical field of test boxes, in particular to an acoustic test box for a single loudspeaker.

Background

Along with the improvement of economic level, the living standard of people is better and better, and electronic products are used as indispensable objects in modern society, which brings great convenience to the life of people. After the electronic product is produced, performance testing is required to be performed, wherein the testing of the loudspeaker of the electronic product is required to be performed in an acoustic testing box. After the loudspeaker is powered on, the acoustic testing software sends a test execution command to enable the loudspeaker to make sound in each frequency band of low frequency, medium frequency, high frequency and the like, and then the sound wave information is collected through the microphone and analyzed, and a oscillogram is output.

At present, the relatively poor problem of sound insulation performance still exists in the acoustical test sound-proof box of monomer loudspeaker on the market, can not provide good test environment for the acoustical test of monomer loudspeaker, influences monomer loudspeaker product quality to need frequently to switch the chamber door of box when the test and get and put, the operation is very inconvenient.

Disclosure of Invention

The invention aims to solve the technical problem of overcoming the defects of the prior art and provides the single horn acoustic test box which is convenient to operate, has good sound insulation performance and can create a good test environment.

The technical scheme adopted by the invention is as follows: the device comprises a lower box body and a sound-proof shield, wherein a test microphone is arranged in the lower box body, a sound-proof layer is arranged on the inner wall of the lower box body, the sound-proof shield is arranged on the lower box body through a lifting device, a product placing piece is arranged on the upper end surface of the lower box body and is positioned below the sound-proof shield, a test port communicated with the interior of the lower box body is arranged on the product placing piece, and the test port is matched with the test microphone.

Further, be provided with product hold-down mechanism in the sound-proof housing, product hold-down mechanism includes the top mounting panel, the lower extreme of top mounting panel is provided with the installation piece, the lower extreme of installation piece floats and is provided with the pressure head, the pressure head is located the top of test port, the pressure head with be provided with pressure sensor between the installation piece.

Further, be equipped with the cavity in the installation piece, it is provided with the floating plate to slide in the cavity, pressure sensor sets up the upper end of floating plate, the lower extreme of floating plate is provided with pressure spring, the pressure head pass through the guide post with pressure spring cooperatees, the lower extreme of guide post with the pressure head is connected, the upper end of guide post with installation piece sliding fit and with pressure spring cooperation.

Further, the lower box body comprises an outer box body and an inner box body, a space layer is arranged between the outer box body and the inner box body, the sound insulation layer is arranged on the inner wall of the inner box body, a microphone fixing component is arranged in the inner box body, and the testing microphone is arranged on the microphone fixing component.

Further, the front side of sound-proof housing is provided with the ya keli board, the inboard of sound-proof housing is provided with soundproof cotton, the both sides of piece are placed to the product set up all to have the LED lamp.

Further, the upper end of box is provided with the protection casing down, the sound-proof housing is located in the protection casing, the front side of protection casing is equipped with the opening, the both sides of opening are provided with safe grating.

Further, elevating gear includes two mount pads, the inboard of mount pad is provided with perpendicular slide rail and rodless cylinder, it is provided with the backup pad to slide on the perpendicular slide rail, the backup pad with the drive end of rodless cylinder is connected, the backup pad with the side of sound-proof housing is connected, be provided with the response piece in the backup pad, the upper and lower both ends of one side of mount pad all be provided with response piece matched with sensor, the upper and lower both ends of the opposite side of mount pad all are provided with the buffer, two the buffer all with the backup pad cooperatees.

Further, the lower extreme of top mounting panel is provided with the installation riser, be provided with the L template on the installation piece, be provided with waist type hole on the L template, the L template passes through waist type hole sets up on the installation riser with the fixed screw cooperation, the upper end of L template is provided with the limiting plate, be provided with stop screw on the limiting plate, stop screw with the top mounting panel cooperatees, still be provided with the strengthening rib on the installation riser.

Further, one side of box is provided with the maintenance door down, the one end of maintaining the door articulates under on the box, the other end of maintaining the door is provided with the retaining member, the retaining member is in with the setting the closure cooperation on the box down, be provided with the magnetism on the box down and inhale the locating part, the magnetism is inhaled the locating part and is close to maintain the door with the articulated department of box down, the magnetism inhale the locating part with maintain the door and cooperate.

Furthermore, the lower extreme of box is provided with four group's buffer structure down, buffer structure's lower extreme is provided with universal wheel subassembly, buffer structure includes the upper fixed plate, the lower extreme of upper fixed plate is provided with shock attenuation silica gel, the lower extreme of shock attenuation silica gel is provided with the bottom plate, be provided with a plurality of equal altitude screws on the bottom plate, a plurality of equal altitude screws pass shock attenuation silica gel and with the upper fixed plate is connected, universal wheel subassembly is including rotating setting up universal caster and the foot cup on the bottom plate, the setting can be adjusted from top to bottom to the foot cup.

The invention has the beneficial effects that: the lower box body is internally provided with the testing microphone, so that the lower box body is used as a testing place to carry out acoustic testing on the horn to be tested, the product placing piece at the upper end of the lower box body is used for placing the horn to be tested, the testing port is communicated with the inside of the lower box body, so that the sound of the horn to be tested can be transmitted to the testing microphone, the sound-proof cover is used for sealing and sound-proof the product placing piece, so that the horn to be tested can be isolated from external noise during testing, and the lifting device drives the sound-proof cover to move up and down, so that the sound-proof of a testing environment is realized; the test environment is independent, the test is realized by taking the test port as a sound transmission channel, the loudspeaker to be tested can be received by the microphone to be tested, the sound insulation performance is good, external noise is isolated through the sound insulation cover during testing, a good test environment can be created, and when the loudspeaker to be tested is taken and placed, the sound insulation cover can be lifted by the lifting device, interference is removed, and operation is facilitated.

Drawings

FIG. 1 is a schematic perspective view of the present invention;

FIG. 2 is a schematic perspective view of another embodiment of the present invention;

FIG. 3 is a schematic perspective view of the present invention with a portion of the structure removed;

FIG. 4 is a schematic perspective view of the present invention with the maintenance door removed;

FIG. 5 is a schematic perspective view of the hood, the lift device, and the acoustic enclosure;

FIG. 6 is an exploded view of the lift device, the sound enclosure, and the product hold-down mechanism;

FIG. 7 is an exploded view of the product compression mechanism;

FIG. 8 is a schematic perspective view of the lifting device;

FIG. 9 is an exploded view of the cushioning structure and the universal wheel assembly.

Detailed Description

As shown in fig. 1 to 9, in this embodiment, the present invention includes a lower case 1 and a sound-proof cover 2, a test microphone 3 is disposed in the lower case 1, a sound-proof layer 4 is disposed on an inner wall of the lower case 1, the sound-proof cover 2 is disposed on the lower case 1 through a lifting device 5, a product placing member 6 is disposed on an upper end surface of the lower case 1, the product placing member 6 is located below the sound-proof cover 2, a test port 7 communicating with an inside of the lower case 1 is disposed on the product placing member 6, and the test port 7 is matched with the test microphone 3. The medial surface of box 1 is provided with puigging 4 down and realizes giving sound insulation, thereby does test microphone 3 provides a test environment that sound-proof performance is good, sound-proof housing 2 passes through elevating gear 5 can reciprocate the setting and be in the upper end of box 1 down, the product is placed 6 and is used for the awaiting measuring placing of awaiting measuring loudspeaker, test mouth 7 will await measuring the sound of loudspeaker when being used for the test convey extremely test microphone 3 makes test microphone 3 can carry out the acoustic test. The invention independently separates the taking and the placing of the product to be tested and the testing of the product, does not need to open the closed state of the testing environment during the testing, can realize the isolation of the external sound only by the sound-proof housing 2, and is very convenient for the taking and the placing of the product to be tested. As can be seen from the above, the test microphone 3 is arranged in the lower box body 1, so that the lower box body 1 is used as a test place to perform acoustic test on a horn to be tested, the product placing part 6 at the upper end of the lower box body 1 is used for placing the horn to be tested, the test port 7 is directly communicated with the inside of the lower box body 1, so that the sound of the horn to be tested can be transmitted to the test microphone 3, the sound-proof housing 2 is used for isolating the horn to be tested from external noise, and the lifting device 5 drives the sound-proof housing 2 to move up and down, so that sound insulation of a test environment is realized, and a test effect is ensured; according to the invention, the test environment is independently opened, the test port 7 is used as a sound transmission channel, so that the loudspeaker to be tested can be received by the test microphone 3 to realize the test, the sound insulation performance is good, in addition, the external noise isolation is realized through the sound insulation cover 2 during the test, a good test environment can be created, and when the loudspeaker to be tested is taken and placed, the lifting device 5 can lift the sound insulation cover 2 to remove the interference, and the operation of taking and placing the loudspeaker to be tested is convenient.

In this embodiment, be provided with product hold-down mechanism 8 in sound-proof housing 2, product hold-down mechanism 8 includes top mounting panel 81, the lower extreme of top mounting panel 81 is provided with installation piece 82, the lower extreme of installation piece 82 floats and is provided with pressure head 83, pressure head 83 is located the top of test port 7, pressure head 83 with be provided with pressure sensor 84 between the installation piece 82. The product compressing structure is used for compressing the to-be-tested loudspeaker to enable the to-be-tested loudspeaker to be tightly attached to the testing port 7 so as to ensure the sound transmission effect; product compact structure includes top mounting panel 81, installation piece 82, pressure head 83 and pressure sensor 84, during the use, elevating gear 5 drives sound-proof housing 2 moves down, product hold-down mechanism 8 is followed and is moved down, afterwards pressure head 83 contact awaits measuring loudspeaker and will await measuring loudspeaker and compress tightly, because pressure head 83 floats and sets up, consequently pressure head 83 has certain cushion nature, thereby the atress moves up the extrusion pressure sensor 84 makes operating personnel know the dynamics of compressing tightly to in further operation.

In this embodiment, a cavity 85 is formed in the mounting block 82, a floating plate 86 is slidably disposed in the cavity 85, the pressure sensor 84 is disposed at an upper end of the floating plate 86, a pressure spring 87 is disposed at a lower end of the floating plate 86, the ram 83 is engaged with the pressure spring 87 through a guide post 88, a lower end of the guide post 88 is connected to the ram 83, and an upper end of the guide post 88 is slidably engaged with the mounting block 82 and engaged with the pressure spring 87. When the pressure head 83 moves upwards, the guide post 88 slides upwards in the mounting block 82, so that the pressure spring 87 is extruded, then the floating plate 86 is driven to move upwards in the cavity 85, and when the pressure head moves upwards, the pressure sensor 84 calculates the upwards moving thrust in real time to realize pressure calculation; the ram 83 achieves a floating effect by means of the guide posts 88 and the pressure spring 87.

In this embodiment, the lower case 1 includes an outer case 101 and an inner case 102, a space layer is disposed between the outer case 101 and the inner case 102, the sound insulation layer 4 is disposed on an inner wall of the inner case 102, a microphone fixing component 9 is disposed in the inner case 102, and the test microphone 3 is disposed on the microphone fixing component 9. Lower box 1 divide into outer box 101 and interior box 102, can play better syllable-dividing effect through set up the space layer between two boxes to guarantee test environment's syllable-dividing, test microphone 3 passes through microphone fixed subassembly 9 sets up in interior box 102, can carry out position, height and angle as required and adjust.

In this embodiment, the front side of sound-proof housing 2 is provided with acrylic sheet 10, the inboard of sound-proof housing 2 is provided with soundproof cotton, the both sides of product placing member 6 are provided with all LED lamps 11. Inferior gram force board 10 is transparent inferior gram force board 10 to can observe inside condition when using, locate inferior gram force board 10 department, the remaining part of the inboard of sound-proof housing 2 all sets up sound-proof layer 4 is in order to guarantee syllable-dividing effect, LED lamp 11 is used for placing 6 to the product and throws light on, thereby after sound-proof housing 2 pushes down, can pass through externally inferior gram force board 10 observes inside in real time, guarantees to watch clearly.

In this embodiment, the upper end of lower box 1 is provided with protection casing 12, sound-proof housing 2 is located in protection casing 12, the front side of protection casing 12 is equipped with the opening, the both sides of opening are provided with safe grating 13. The protection casing 12 covers and establishes the upper end of box 1 down, is in setting up each part on the box 1 is protected down, the front side of protection casing 12 is open, and as the access channel of the loudspeaker that awaits measuring, safety grating 13 is used for protecting operating personnel, can detect and have or not the object to get into detection range to prevent that operating personnel from being moved down the sound-proof housing 2 is crushed.

In this embodiment, the lifting device 5 includes two mounting bases 51, a vertical slide rail 52 and a rodless cylinder 53 are disposed on the inner side of the mounting base 51, a support plate 54 is slidably disposed on the vertical slide rail 52, the support plate 54 is connected to the driving end of the rodless cylinder 53, the support plate 54 is connected to the side surface of the soundproof cover 2, a sensing piece 55 is disposed on the support plate 54, sensors 56 matched with the sensing piece 55 are disposed at the upper and lower ends of one side of the mounting base 51, buffers 57 are disposed at the upper and lower ends of the other side of the mounting base 51, and the two buffers 57 are matched with the support plate 54.

In this embodiment, the lower extreme of top mounting panel 81 is provided with installation riser 89, be provided with L template 90 on the installation piece 82, be provided with waist type hole 91 on the L template 90, L template 90 passes through waist type hole 91 sets up on installation riser 89 with the fixed screw cooperation, L template 90's upper end is provided with limiting plate 92, be provided with stop screw 93 on the limiting plate 92, stop screw 93 with top mounting panel 81 cooperatees, still be provided with strengthening rib 94 on the installation riser 89. The vertical distance of the L-shaped plate 90 on the mounting vertical plate 89 can be changed by adjusting the matching of the limiting screw 93 and the top mounting plate 81, so that the lower pressure degree of the product pressing mechanism 8 is adjusted, the adjusting structure is simple, and the operation is convenient; l template 90 with adopt sliding fit's mode between the installation riser 89, add waist type hole 91 and set screw realization fixed spacing, prevent to drop.

In this embodiment, one side of box 1 is provided with maintenance door 14 down, the one end of maintenance door 14 articulates under on the box 1, the other end of maintenance door 14 is provided with retaining member 15, retaining member 15 is in with the setting locking member 16 cooperation on the box 1 down, be provided with magnetic suction locating part 17 down on the box 1, magnetic suction locating part 17 is close to maintenance door 14 with the articulated department of box 1 down, magnetic suction locating part 17 with maintenance door 14 cooperatees. The maintenance door 14 can be used for maintaining or replacing the test microphone 3 and the microphone fixing component 9, the maintenance door 14 is locked and fixed through the matching of the locking piece 15 and the locking piece 16 to guarantee the sound insulation effect of a test environment, the locking piece 15 is provided with a key unlocking structure, and the maintenance door 14 can be prevented from being opened randomly or being opened mistakenly by a key, the magnetic suction limiting piece 17 is used for limiting the maintenance door 14, so that the opening angle of the maintenance door 14 is firstly, an electrical piece on the side edge cannot be collided, the magnetic suction limiting piece 17 can suck the opened maintenance door 14, the maintenance door 14 cannot be shaken disorderly during maintenance, and maintenance work is avoided being influenced.

In this embodiment, four groups of buffer structures 18 are disposed at the lower end of the lower box body 1, a universal wheel assembly 19 is disposed at the lower end of each buffer structure 18, each buffer structure 18 includes an upper fixing plate 181, a shock-absorbing silica gel 182 is disposed at the lower end of the upper fixing plate 181, a lower fixing plate 183 is disposed at the lower end of the shock-absorbing silica gel 182, a plurality of equal-height screws 184 are disposed on the lower fixing plate 183, the equal-height screws 184 penetrate through the shock-absorbing silica gel 182 and are connected with the upper fixing plate 181, the universal wheel assembly 19 includes universal casters 191 and goblets 192 rotatably disposed on the lower fixing plate 183, and the goblets 192 can be adjusted up and down. The buffer structure 18 can play a role in shock absorption and prevent external shock from affecting the test effect, the universal caster 191 enables the test device to be convenient to transfer, and the foot cup 192 is adjusted up and down to be used for positioning or releasing limitation, so that a fixed placement or movable effect is realized.

While the embodiments of the present invention have been described in terms of practical embodiments, they are not to be construed as limiting the meaning of the present invention, and modifications of the embodiments and combinations with other embodiments will be apparent to those skilled in the art in light of the present description.

Claims

1. Monomer loudspeaker acoustics test box, its characterized in that: it includes box (1) and sound-proof housing (2) down, be provided with test microphone (3) in box (1) down, be provided with puigging (4) on the inner wall of box (1) down, sound-proof housing (2) set up through elevating gear (5) down on box (1), the up end of box (1) is provided with the product down and places piece (6), the product is placed piece (6) and is located the below of sound-proof housing (2), be equipped with the intercommunication on the product is placed piece (6) test mouth (7) of box (1) inside down, test mouth (7) with test microphone (3) cooperate.

2. The unibody horn acoustic test chamber of claim 1, wherein: be provided with product hold-down mechanism (8) in sound-proof housing (2), product hold-down mechanism (8) are including top mounting panel (81), the lower extreme of top mounting panel (81) is provided with installation piece (82), the lower extreme of installation piece (82) floats and is provided with pressure head (83), pressure head (83) are located the top of test socket (7), pressure head (83) with be provided with pressure sensor (84) between installation piece (82).

3. The unibody horn acoustic test chamber of claim 2, wherein: the pressure sensor is characterized in that a cavity (85) is arranged in the mounting block (82), a floating plate (86) is arranged in the cavity (85) in a sliding mode, the pressure sensor (84) is arranged at the upper end of the floating plate (86), a pressure spring (87) is arranged at the lower end of the floating plate (86), the pressure head (83) is matched with the pressure spring (87) through a guide column (88), the lower end of the guide column (88) is connected with the pressure head (83), and the upper end of the guide column (88) is matched with the mounting block (82) in a sliding mode and matched with the pressure spring (87).

4. The unibody horn acoustic test chamber of claim 1, wherein: the lower box body (1) comprises an outer box body (101) and an inner box body (102), a separation layer is arranged between the outer box body (101) and the inner box body (102), the inner wall of the inner box body (102) is provided with the sound insulation layer (4), a microphone fixing component (9) is arranged in the inner box body (102), and the testing microphone (3) is arranged on the microphone fixing component (9).

5. The unibody horn acoustic test chamber of claim 1, wherein: the front side of sound-proof housing (2) is provided with ya keli board (10), the inboard of sound-proof housing (2) is provided with soundproof cotton, the both sides setting of piece (6) are all had LED lamp (11) to the product.

6. The unibody horn acoustic test chamber of claim 1, wherein: the upper end of box (1) is provided with protection casing (12) down, sound-proof housing (2) are located in protection casing (12), the front side of protection casing (12) is equipped with the opening, the both sides of opening are provided with safety grating (13).

7. The unibody horn acoustic test chamber of claim 1, wherein: elevating gear (5) include two mount pads (51), the inboard of mount pad (51) is provided with perpendicular slide rail (52) and rodless cylinder (53), it is provided with backup pad (54) to slide on perpendicular slide rail (52), backup pad (54) with the drive end of rodless cylinder (53) is connected, backup pad (54) with the side of sound-proof housing (2) is connected, be provided with response piece (55) on backup pad (54), the upper and lower both ends of one side of mount pad (51) all be provided with response piece (55) matched with sensor (56), the upper and lower both ends of the opposite side of mount pad (51) all are provided with buffer (57), two buffer (57) all with backup pad (54) cooperate.

8. The unibody horn acoustic test chamber of claim 2, wherein: the lower extreme of top mounting panel (81) is provided with installation riser (89), be provided with L template (90) on installation piece (82), be provided with waist type hole (91) on L template (90), L template (90) pass through waist type hole (91) set up on installation riser (89) with the fixed screw cooperation, the upper end of L template (90) is provided with limiting plate (92), be provided with stop screw (93) on limiting plate (92), stop screw (93) with top mounting panel (81) cooperate, still be provided with strengthening rib (94) on installation riser (89).

9. The unibody horn acoustic test chamber of claim 1, wherein: one side of box (1) is provided with maintenance door (14) down, the one end of maintenance door (14) articulates down on box (1), the other end of maintenance door (14) is provided with retaining member (15), retaining member (15) and setting are in closure (16) cooperation on box (1) down, be provided with magnetism on box (1) down and inhale locating part (17), magnetism is inhaled locating part (17) and is close to maintenance door (14) with the articulated department of box (1) down, magnetism inhale locating part (17) with maintenance door (14) cooperate.

10. The unibody horn acoustic test chamber of claim 1, wherein: the lower end of the lower box body (1) is provided with four groups of buffer structures (18), the lower end of each buffer structure (18) is provided with a universal wheel assembly (19), each buffer structure (18) comprises an upper fixing plate (181), the lower end of each upper fixing plate (181) is provided with a shock absorption silica gel (182), the lower end of each shock absorption silica gel (182) is provided with a lower fixing plate (183), a plurality of equal-height screws (184) are arranged on the lower fixing plates (183), the equal-height screws (184) penetrate through the shock absorption silica gels (182) and are connected with the upper fixing plates (181), the universal wheel assemblies (19) comprise universal casters (191) and foot cups (192) which are rotatably arranged on the lower fixing plates (183), and the foot cups (192) can be vertically adjusted.