CN108235214B

CN108235214B - Cavity for testing horn and acoustic testing equipment with cavity

Info

Publication number: CN108235214B
Application number: CN201711457536.6A
Authority: CN
Inventors: 王周丹; 贾崇江
Original assignee: Shanghai Chuanying Information Technology Co Ltd
Current assignee: Shanghai Chuanying Information Technology Co Ltd
Priority date: 2017-12-28
Filing date: 2017-12-28
Publication date: 2021-04-30
Anticipated expiration: 2037-12-28
Also published as: CN108235214A

Abstract

The invention provides a cavity for testing a loudspeaker and an acoustic testing device with the cavity, wherein the cavity comprises a cavity shell, the loudspeaker is accommodated in the cavity shell, and a first pin and a second pin are arranged on one end surface of the loudspeaker; a first notch and a second notch are formed in one top surface, facing the end face, of the cavity shell, the first notch and the second notch penetrate through the top surface, and the first notch and the second notch are arranged corresponding to the first pin and the second pin; first conductor and second conductor are fixed with respectively in first notch and the second notch, first conductor and second conductor to loudspeaker extend, with first pin and second pin contact switch on, just first conductor and second conductor are to keeping away from the direction of loudspeaker extends, and the part exposes the top surface is in order to provide a test circuit. By adopting the invention, the preparation time in the early stage of the test can be saved, the test accuracy is improved, and the recovery and the utilization after the test of the loudspeaker are facilitated.

Description

Cavity for testing horn and acoustic testing equipment with cavity

Technical Field

The invention relates to the field of testing of internal elements of an intelligent terminal, in particular to a cavity for testing a loudspeaker and acoustic testing equipment with the cavity.

Background

With the development of hardware technology, various mobile devices are influencing the life of people, at present, mobile devices, similar to mobile phones and tablet computers, have gradually penetrated into the aspects of the life of people, and terminals such as mobile phones and the like almost become necessities of daily life of people, wherein people also pay more and more attention to the quality of the loudspeaker sound effect of the devices. Simulation cavity test, the indispensable partly of project, even when loudspeaker performance is accepted, also need be with the help of simulation cavity test, can carry out acoustic performance test to many producers loudspeaker monomer in a standard cavity, can finely distinguish, and each producer loudspeaker performance is convenient not enough, and simulation cavity test also can compare with the project design cavity, can well see whether present project loudspeaker cavity is sealed and not enough, convenient further optimization measure.

Among the prior art, the producer uses two pin welding of flying wire and loudspeaker, then link to each other the sound source with loudspeaker, carry out emulation cavity test, but such scheme can lead to accomplishing the back in the test, loudspeaker can't be intact preserve, scrapped is many at most, in welding process, because welded level varies from person to person, do not have unified connection standard, lead to loudspeaker monomer stability of performance inconsistent, there is the error in the data of test, the loudspeaker is connected to the flying wire simultaneously, the unable fine part of cavity is airtight, lead to the test effect inaccurate.

Therefore, a cavity for testing a horn and an acoustic testing apparatus having the same are needed to overcome the disadvantages of the prior art.

Disclosure of Invention

In order to overcome the technical defects, the invention aims to provide a cavity for testing a horn.

The invention discloses a cavity for testing a horn, which comprises a cavity shell, wherein the horn is accommodated in the cavity shell,

a first pin and a second pin are arranged on one end face of the horn;

a first notch and a second notch are formed in one top surface, facing the end face, of the cavity shell, the first notch and the second notch penetrate through the top surface, and the first notch and the second notch are arranged corresponding to the first pin and the second pin;

a first conductor and a second conductor are respectively fixed in the first notch and the second notch, extend towards the horn, and are in contact conduction with the first pin and the second pin, and

the first conductor and the second conductor extend in a direction away from the horn, and part of the first conductor and the second conductor are exposed out of the top surface, so that a test circuit is provided.

Preferably, the first and second conductors are clearance fit with the first and second notches with a minimum of zero clearance.

Preferably, the height of the horn towards the end face direction is the same as the height of the cavity shell in the same direction, and the distance between the first pin and the top face and the distance between the second pin and the top face are zero.

Preferably, the first conductor and the second conductor extend in a direction away from the horn in any one of a direction orthogonal to a plane of the top surface and a direction of the plane of the top surface.

Preferably, the first conductor and the second conductor are both cuboids.

Preferably, the chamber housing has at least one sound hole therein for the transmission of sound emitted by the horn.

Preferably, the cavity shell further comprises a rear cover, a fixing device is arranged at the joint of the rear cover and the cavity shell, the rear cover is fixed on the cavity shell through the fixing device, the fixing device is opened, and the rear cover is detached from the cavity shell.

In another aspect, the invention further provides an acoustic testing device, which has the cavity.

After the technical scheme is adopted, compared with the prior art, the method has the following beneficial effects:

1, improving the tightness of the cavity, thereby improving the test accuracy;

2, a non-welding connection mode is used, so that the loudspeaker can be still recycled or reused after being tested;

3. the preparation time of the early stage of the test is reduced.

Drawings

FIG. 1 is a schematic illustration of a cross-section of a preferred chamber for a test horn according to the present invention;

FIG. 2 is a side view of a preferred chamber for a test horn according to the present invention;

fig. 3 is a side view of a preferred chamber for a test horn according to the present invention.

Reference numerals: 1, a cavity shell; 2 a conductor; 3, a sound hole; 4, a loudspeaker.

Detailed Description

The advantages of the invention are further illustrated in the following description of specific embodiments in conjunction with the accompanying drawings.

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.

The terminology used in the present disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. As used in this disclosure and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

It is to be understood that although the terms first, second, third, etc. may be used herein to describe various information, such information should not be limited to these terms. These terms are only used to distinguish one type of information from another. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope of the present disclosure. Depending on context, the word "if" as used herein may be interpreted as "at … …" or "when … …" or "in response to a determination"

In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention.

In the description of the present invention, unless otherwise specified and limited, it is to be noted that the terms "mounted," "connected," and "connected" are to be interpreted broadly, and may be, for example, a mechanical connection or an electrical connection, a communication between two elements, a direct connection, or an indirect connection via an intermediate medium, and specific meanings of the terms may be understood by those skilled in the art according to specific situations.

In the following description, suffixes such as "module", "component", or "unit" used to denote elements are used only for facilitating the explanation of the present invention, and have no specific meaning in themselves. Thus, "module" and "component" may be used in a mixture.

Therefore, a cavity for testing the horn is needed to make up for the defects in the prior art, reduce the preparation work in the early stage of testing, make the horn available after testing, improve the tightness of the simulation cavity, thus improving the accuracy of testing and eliminating the human variability,

in particular, with reference to figure 1, which is a schematic view of a cross-section of a preferred chamber for testing a loudspeaker 4 according to the present invention, a chamber for testing a loudspeaker 4 can be seen, said chamber comprising a chamber housing 1, said chamber housing 1 accommodating said loudspeaker 4, characterized in that,

a first pin and a second pin are arranged on one end face of the loudspeaker 4;

a first notch and a second notch are formed in one top surface, facing the end face, of the cavity shell 1, the first notch and the second notch penetrate through the top surface, and the first notch and the second notch are arranged corresponding to the first pin and the second pin;

a first conductor 2 and a second conductor 2 are respectively fixed in the first notch and the second notch, the first conductor 2 and the second conductor 2 extend to the loudspeaker 4 to be in contact conduction with the first pin and the second pin, and

the first conductor 2 and the second conductor 2 extend away from the horn 4, partially exposing the top surface to provide a test circuit.

More specifically, the inside capacity of intelligent terminal is limited, consequently the position of distributing to different parts all need carry out the research of a long time, loudspeaker 4 is so simultaneously, when carrying out loudspeaker 4's emulation cavity test, the cavity is according to can distributing to loudspeaker 4's big or small preparation, therefore the cavity can hold loudspeaker 4 and be the basis in the basis of carrying out cavity test and the inside position distribution of intelligent terminal, so can hold loudspeaker 4 in order to guarantee the cavity, put into the cavity with loudspeaker 4 earlier.

One end face of the horn 4 is provided with a first pin and a second pin.

More specifically, the pin is loudspeaker 4's indispensable spare part, loudspeaker 4 itself can't carry out self-actuation, loudspeaker 4 needs external driving source to make it drive the use, and external driving source passes through the pin and establishes into a circuit with loudspeaker 4, and the outside driving source can transmit the signal of telecommunication to loudspeaker 4 like this, and loudspeaker 4 discerns the signal of telecommunication that comes, makes sound from this, in order to establish electric circuit with external driving source, from this sets up two pins on loudspeaker 4.

The cavity shell 1 is above to a top surface of terminal surface is provided with first notch and second notch, first notch and second notch link up the top surface, just first notch and second notch correspond to first pin and second pin set up, be fixed with first conductor 2 and second conductor 2 in first notch and the second notch respectively.

More specifically, the present invention is one of the improvements of the prior art, in the prior art, a flying wire is used to weld two pins of the horn 4, and then the flying wire is connected with an external driving source, so as to perform a simulation cavity test, however, after the test is completed, the horn 4 cannot be stored perfectly, and many scrapped horns are used, and during the welding process, because the welding level varies from person to person and there is no uniform connection standard, the stability of the performance of the horn 4 is inconsistent, the tested data has errors, and meanwhile, the flying wire is connected with the horn 4, the cavity cannot be partially sealed well, so that the test effect is inaccurate. Therefore, two notches are provided on the top surface of the cavity housing 1 facing the pins, and in the preferred embodiment, the notches penetrate the top surface of the cavity housing 1 as shown in fig. 1, and two conductors 2 are respectively fixed in the two notches, and the conductors 2 are used as a medium for connecting with the pins instead of flying wires, and the two notches are respectively arranged corresponding to the two pins, which has the advantage that if the conductors 2 are solid and hard substances, the conductors 2 can be directly connected with the two pins, and excessive treatment is not needed, so that the material of the conductors 2 can be copper foil, which has low surface oxygen property, can be attached to various different base materials, such as metal, insulating materials and the like, and has a wide temperature use range. The conductive copper foil is mainly applied to electromagnetic shielding and antistatic, the conductive copper foil is arranged on the bottom surface of the substrate and combined with a metal base material, so that the conductive copper foil has excellent conductivity and provides an electromagnetic shielding effect. The method can be divided into the following steps: self-adhesive copper foil, double-conductive copper foil, single-conductive copper foil, and the like. The electronic-grade copper foil (with the purity of more than 99.7 percent and the thickness of 5-105 um) is one of basic materials in the electronic industry, has the performance advantages of remarkably improving the use consistency of the battery pack, greatly reducing the cost of the battery pack, remarkably reducing the dynamic internal resistance amplification of a battery cell, improving the pressure difference consistency of the battery pack, prolonging the service life of the battery pack, improving the adhesive force of an active material and a current collector and reducing the manufacturing cost of a pole piece. Such as: the adhesive force of the anode material and the collector using an aqueous system is improved; improving the adhesion of the nano-scale or submicron-scale anode material and the collector; the adhesion of lithium titanate or other high-capacity negative electrode materials and a collector is improved; the qualification rate of the pole piece is improved, and the manufacturing cost of the pole piece is reduced. Reduce polarization, improve multiplying power and gram capacity, promote battery performance. Such as: partially reducing the proportion of the adhesive in the active material and improving the gram volume; improving electrical contact between the active and the current collector; reduce polarization and improve power performance. The current collector is protected, and the service life of the battery is prolonged. Such as:

the collector is prevented from being corroded and oxidized; the surface tension of the collector is improved, and the easy coating performance of the collector is enhanced; can replace the etched foil with higher cost or replace the original standard foil with thinner foil. Thus, copper foil is selected as the main material of the conductor 2.

The first conductor 2 and the second conductor 2 extend towards the horn 4 to contact and conduct with the first pin and the second pin.

More specifically, use two conductors 2 of copper foil as main material to be fixed in two notches, the effect of these two conductors 2 with replace the flying wire among the prior art, be connected with two pins of loudspeaker 4, consequently, these two conductors 2 extend to loudspeaker 4, extend to and be connected and fully contact with two pins of loudspeaker 4 and stop when conducting, just so guaranteed when testing every loudspeaker 4, the audio that loudspeaker 4 showed can not produce the error because the connection of conductor 2 and loudspeaker 4's pin is insufficient, made up the not enough among the prior art.

More specifically, the two conductors 2 are used for replacing flying leads to be connected with two pins of the loudspeaker 4 and serve as a medium for being connected with an external driving source, so that the two conductors 2 which are made of copper foils as main materials need to exceed the cavity shell 1 after meeting the condition that the two pins of the loudspeaker 4 are in full contact, and can be connected with other circuit parts to establish a complete circuit, so that the driving source can transmit signals to the loudspeaker 4 and then carry out simulation cavity testing. Thus, a more complete technical scheme for replacing the prior art is formed.

In particular, with reference to fig. 1, which is a preferred embodiment according to the invention, wherein the fixation of the conductors 2 and the slots can be seen in fig. 1, said first conductors 2 and second conductors 2 are in clearance fit with said first slots and second slots, the clearance being at least zero.

The first conductor 2 and the second conductor 2 are in clearance fit with the first notch and the second notch, and the minimum clearance is zero.

More specifically, in the simulation cavity test of the speaker 4, the test result determines the sound effect of the speaker 4 according to the sound emitted from the sound hole 3 of the cavity housing 1, so that in the simulation test, any place with a gap except the sound hole 3 will affect the result of the simulation cavity test, which will cause errors, and this also means that in the prior art, when the flying wire is used as the connecting medium with the pin of the speaker 4, the flying wire itself will occupy a certain space, when the cavity is closed, the space occupied by the flying wire itself will result in incomplete closing, and the resulting gap will greatly affect the accuracy of the simulation cavity test, so in order to compensate the defects in the prior art, in a preferred embodiment according to the present invention, the two conductors 2 are respectively in clearance fit with the two notches, and the gap is zero, such an arrangement can make the cavity be sealed to the maximum extent, the accuracy of the simulation cavity test is ensured.

Specifically, refer to fig. 1, which is a preferred embodiment according to the present invention, wherein it can be seen that the height of the horn 4 in the direction of the end surface is the same as the height of the chamber shell 1 in the same direction, and the distance between the first pin and the second pin and the top surface is zero.

The height of the horn 4 towards the end face direction is the same as the height of the cavity shell 1 in the same direction, and the distance between the first pin and the top face and the distance between the second pin and the top face are zero.

More specifically, in the simulation cavity test, loudspeaker 4 is built in the cavity, through using copper foil to be connected with the external world as two conductors 2 of main material, establish complete circuit after being connected with the driving source, conductor 2 is though the resistance value of itself is minimum, but in this kind of test that accuracy requirement is higher itself, little resistance also can lead to the huge difference of final result, so when pin and notch are very close, at this moment, conductor 2 with pin fully contact and when conducting, conductor 2's thickness can guarantee to be as little as possible, when conductor 2 thickness is less, conductor 2's self resistance has also been reduced, under this condition, can guarantee that the final result of simulation cavity test is comparatively accurate. Simultaneously when pin and notch contact, guaranteed like this that loudspeaker 4 contacts chamber shell 1 from top to bottom respectively, chamber shell 1 can fix loudspeaker 4's position like this, and loudspeaker 4's position can not lead to loudspeaker 4's pin to leave conductor 2 because of rocking or other actions of chamber shell 1, perhaps with conductor 2's contact failure. In this case, in order to ensure that the conductor 2 is sufficiently contacted and conducted with the pin, the pin of the horn 4 is arranged to contact the first notch and the second notch and cannot be easily moved.

In particular, reference is made to fig. 1, which is a preferred embodiment according to the present invention, wherein it can be seen that the first conductor 2 and the second conductor 2 are each a rectangular parallelepiped.

More specifically, in the simulation cavity test, the connection between the conductor 2 and the pin of the horn 4 is particularly important, and may have a significant influence on the final test result, so that the conductor 2 is configured as a rectangular body, and in such a case, the conductor 2 and the pin of the horn 4 may ensure the contact of the largest area.

In particular, reference is made to fig. 1, which is a preferred embodiment according to the present invention, wherein it can be seen that the housing 1 has at least one sound hole 3 for the transmission of sound emitted by a loudspeaker 4.

More specifically, in the simulation cavity test, the test structure is judged according to the sound transmitted by the sound holes 3 on the cavity shell 1, and the sound holes 3 on the cavity shell 1 are judged according to the number of the sound holes 3 on the actual intelligent terminal, in this case, the cavity shell 1 is a basis that at least one sound hole 3 is required to be arranged as the sound effect performance judgment, otherwise, the whole simulation cavity test is meaningless.

Specifically, referring to fig. 1, which is a preferred embodiment according to the present invention, it can be seen that the chamber housing 1 further includes a back cover, a fixing device is disposed at a connection position of the back cover and the chamber housing 1, the back cover is fixed on the chamber housing 1 by the fixing device, and the fixing device is opened, and the back cover is detached from the chamber housing 1.

More specifically, in the simulation cavity test, the cavity is for airtight, mostly all use integrated into one piece's manufacture craft, but under such circumstances, the replacement problem of loudspeaker 4 will be considered, if complete integrated into one piece, just put into loudspeaker 4 when the preparation, can lead to unable reuse of cavity and loudspeaker 4, can't compensate prior art's shortcoming, consequently set up a back lid on chamber shell 1, place into the cavity with loudspeaker 4 through opening the back lid, and simultaneously, the setting sets up a fixing device in the junction of back lid and cavity, this fixing device's effect is fixed the back lid on the cavity, the seal of cavity has been guaranteed, such setting, the accuracy of simulation cavity test result also can be guaranteed.

Referring specifically to fig. 2, which is a side view of a preferred chamber for a test horn 4 of the present invention, it can be seen that the direction of extension of the conductor 2 is orthogonal to the planar direction of the chamber housing 1.

Referring specifically to fig. 3, which is a side view of a preferred chamber for a test horn 4 of the present invention, it can be seen that the conductors 2 extend in the same direction as the plane of the chamber housing 1.

The first conductor 2 and the second conductor 2 extend in a direction away from the horn 4 in any direction between a direction orthogonal to the plane of the top surface and a direction of the plane of the top surface.

More specifically, the two conductors 2 serve as a connection to two pins of the horn 4 instead of flying wires and are connected to a driving source, and the extending direction of the conductor 2 away from the horn 4 may be any direction between a direction orthogonal to the plane of the top surface and a direction of the plane of the top surface, see fig. 2 and 3, where two polar points are taken.

In conclusion, the invention can improve the tightness of the cavity, thereby improving the test accuracy, and the loudspeaker 4 can be still recycled or reused after being tested by using a non-welding connection mode, thereby reducing the preparation working time in the early stage of the test.

The mobile terminal may be implemented in various forms. For example, the terminal described in the present invention may include a mobile terminal such as a mobile phone, a smart phone, a notebook computer, a PDA (personal digital assistant), a PAD (tablet computer), a PMP (portable multimedia player), a navigation device, and the like, and a fixed terminal such as a digital TV, a desktop computer, and the like. In the following, it is assumed that the terminal is a mobile terminal. However, it will be understood by those skilled in the art that the configuration according to the embodiment of the present invention can be applied to a fixed type terminal in addition to elements particularly used for moving purposes.

It should be noted that the embodiments of the present invention have been described in terms of preferred embodiments, and not by way of limitation, and that those skilled in the art can make modifications and variations of the embodiments described above without departing from the spirit of the invention.

Claims

1. A chamber for testing a horn, the chamber comprising a chamber housing in which the horn is housed, characterised in that,

a first pin and a second pin are arranged on one end face of the horn;

the first conductor and the second conductor extend in a direction away from the horn and partially expose the top surface to provide a test circuit, wherein

The first conductor and the second conductor are in clearance fit with the first notch and the second notch, the minimum clearance is zero, the height of the horn in the end face direction is the same as the height of the cavity shell in the same direction, and the distance between the first pin and the top face is zero.

2. The chamber of claim 1,

the first conductor and the second conductor extend in a direction away from the horn in any direction between a direction orthogonal to the plane of the top surface and a direction of the plane of the top surface.

3. The chamber of claim 1,

the first conductor and the second conductor are both cuboids.

4. The chamber of claim 1,

the cavity shell is provided with at least one sound hole for transmitting sound emitted by the loudspeaker.

5. The chamber of claim 1,

the cavity shell further comprises a rear cover, a fixing device is arranged at the joint of the rear cover and the cavity shell, the rear cover is fixed on the cavity shell through the fixing device, the fixing device is opened, and the rear cover is detached from the cavity shell.

6. An acoustic testing device having a chamber according to any one of claims 1 to 5.