CN216775038U

CN216775038U - Earphone test fixture

Info

Publication number: CN216775038U
Application number: CN202220206465.2U
Authority: CN
Inventors: 颜霜; 刘巍; 徐敏龙; 徐世超
Original assignee: Goertek Techology Co Ltd
Current assignee: Goertek Techology Co Ltd
Priority date: 2022-01-25
Filing date: 2022-01-25
Publication date: 2022-06-17
Anticipated expiration: 2032-01-25

Abstract

The utility model relates to the technical field of earphone performance test, and discloses an earphone test fixture which is suitable for the performance test of an earphone with a shell and a sound outlet mouth and comprises a fixing piece and a profiling piece, wherein the fixing piece is provided with a first assembling surface and a limiting channel, and the limiting channel penetrates through the first assembling surface and is used for accommodating and limiting the shell; the profile modeling piece is provided with a second assembling surface and a profile modeling channel, the second assembling surface is abutted to the first assembling surface in a limiting mode, the profile modeling channel penetrates through the second assembling surface and is communicated with the limiting channel, the profile modeling channel is used for accommodating and limiting the sound outlet nozzle, and the extension length of the profile modeling channel is larger than that of the sound outlet nozzle. The earphone testing jig provided by the utility model is beneficial to improving the accuracy and reliability of the earphone performance test.

Description

Earphone test fixture

Technical Field

The utility model relates to the technical field of earphone performance testing, in particular to an earphone testing jig.

Background

In the development process of the earphone, standard test parameters are obtained through sound collection tests based on expected tone quality and noise reduction effects. However, in practice, the earphone mass production is different, and software calibration or optimization of effects and other functions is required to be performed, so that the performance of the calibrated earphone is consistent with the standard performance.

In the related art, taking the in-ear headphone test as an example, the in-ear headphone is generally tested by using an end face sealing scheme. In this test scheme, fix the earphone in fixed frock, make earphone play sound mouth appear in fixed frock, give out the terminal surface of sound mouth tip and the terminal surface laminating of the sound collection end of test fixture, make the earphone go out the sound that the sound mouth sent and get into test fixture in, realize the collection of sound data with the help of the test equipment who is connected with test fixture, debug the earphone performance according to the sound data who gathers again. In fact, the mode that the terminal surface of play sound mouth and the terminal surface butt of the sound collection end of test fixture are sealed is reliable inadequately, produce sound leakage easily between play sound mouth and the test fixture, the sound leakage quantity of different earphones is uncontrollable in the test link, therefore be difficult to guarantee the uniformity of many times earphone test, also can't accurately test out the acoustic performance of earphone, and then lead to relevant earphone calibration parameter to obtain inaccurately, influence the performance debugging and the acoustic performance of earphone.

SUMMERY OF THE UTILITY MODEL

The utility model mainly aims to provide an earphone testing jig, aiming at improving the reliability of earphone performance testing.

In order to achieve the above object, the present invention provides an earphone testing jig for testing performance of an earphone, wherein the earphone has a housing and a sound outlet nozzle disposed on the housing, and the earphone testing jig comprises:

the fixing piece is provided with a first assembling surface and a limiting channel, and the limiting channel penetrates through the first assembling surface and is used for accommodating and limiting the shell; and

the profiling piece is provided with a second assembling surface and a profiling channel, the second assembling surface is abutted to the first assembling surface in a limiting mode, the profiling channel penetrates through the second assembling surface and is communicated with the limiting channel, the profiling channel is used for accommodating and limiting the sound outlet nozzle, and the extending length of the profiling channel is larger than that of the sound outlet nozzle.

In an embodiment of the utility model, the cam comprises a first cam and a second cam;

the first contour piece is fixed between the fixing piece and the second contour piece in a limiting mode, a second assembling surface is arranged on one side, opposite to the second contour piece, of the first contour piece, a limiting hole penetrating through the second assembling surface is formed in the first contour piece, and at least part of structure of the sound outlet nozzle is accommodated and limited in the limiting hole;

the second profiling piece is provided with a sound guide hole, and the sound guide hole is communicated with the limiting hole to form the profiling channel.

In an embodiment of the present invention, the first cam includes a fitting portion and a limiting portion;

the assembly portion with the mounting with the second imitative piece joint is fixed, the assembly portion is equipped with the second assembly face with run through the logical chamber of second assembly face, spacing portion wears to locate lead to the intracavity, and be equipped with spacing hole.

In an embodiment of the present invention, the position-limiting portion includes an elastic sleeve and a binding sleeve;

the binding sleeve is sleeved on the periphery of the elastic sleeve and is abutted against the inner wall of the through cavity for limiting;

the elastic sleeve is provided with the limiting hole, and the binding sleeve is used for blocking radial deformation of the elastic sleeve.

In an embodiment of the present invention, the elastic sleeve and the restraining sleeve are integrally formed.

In an embodiment of the present invention, the second assembling surface is formed with a first protrusion, and the through cavity penetrates through the first protrusion;

the first assembling surface is provided with a first limiting groove, and the first protrusion is clamped and fixed in the first limiting groove.

In an embodiment of the present invention, a second protrusion is disposed on a side of the second cam facing the first cam, and the sound guide hole penetrates through the second protrusion;

the limiting portion is far away from one end of the second assembling surface and is provided with a second limiting groove, the second limiting groove is communicated with the limiting hole, and the second protruding joint is fixed in the second limiting groove.

In an embodiment of the utility model, a first limiting step is arranged on the outer peripheral wall of the second protrusion, a second limiting step is arranged on the inner wall of the through cavity, and the first limiting step and the second limiting step are abutted and limited.

In an embodiment of the utility model, the cam further comprises a third cam;

the third cam piece is detachably connected with the second cam piece, and the third cam piece is provided with a sound pickup cavity communicated with the sound guide hole.

In an embodiment of the present invention, a third limiting groove is disposed at an end of the second cam far away from the first cam, the third limiting groove is communicated with the sound guide hole, and at least part of the structure of the third cam is clamped and fixed in the third limiting groove.

The testing jig in the technical scheme of the utility model comprises a fixing piece and a profiling piece, wherein a shell of the earphone is fixed in a limiting channel of the fixing piece, a sound outlet nozzle of the earphone penetrates through the channel and extends into the profiling channel of the profiling piece, a first assembling surface of the fixing piece is abutted with a second assembling surface of the profiling piece for limiting, and the sound outlet nozzle is accommodated and limited in the profiling channel. With this, the profile modeling piece passes through the profile modeling passageway and goes out the mouthpiece cup joint fixedly, and the outer wall that goes out the mouthpiece is spacing with the inner wall butt of profile modeling passageway, and the sound that the earphone sent through going out the mouthpiece will be difficult to appear leaking, but propagates to earphone test equipment in through the profile modeling passageway, realizes the test of earphone acoustic performance, so can ensure the uniformity of different earphones testing environment in the test link, be favorable to promoting the accuracy and the reliability of earphone acoustic performance test.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

FIG. 1 is a cross-sectional view of an earphone testing fixture according to the present invention;

fig. 2 is an enlarged view of a portion a in fig. 1.

The reference numbers illustrate:

the implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive step based on the embodiments of the present invention, are within the scope of protection of the present invention.

It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.

In the present invention, unless otherwise expressly stated or limited, the terms "connected," "secured," and the like are to be construed broadly, and for example, "secured" may be a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In addition, the descriptions related to "first", "second", etc. in the present invention are only for descriptive purposes and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. The meaning of "and/or" appearing throughout is the same and is meant to encompass three juxtapositions, exemplified by "A and/or B" and including either scheme A, scheme B, or both schemes A and B. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

The utility model provides an earphone test fixture, which is used for testing the performance of an earphone, wherein the performance of the earphone comprises but is not limited to the acoustic performance such as the tone quality, the noise reduction effect and the like of the earphone.

In an embodiment of the present invention, as shown in fig. 1, an earphone 3 to which the earphone testing jig is applied has a housing 31 and a sound outlet 32 disposed on the housing 31, and the earphone testing jig includes a fixing member 1 and a profiling member 2, wherein the fixing member 1 has a first mounting surface 11 and a limiting channel 1a, and the limiting channel 1a penetrates through the first mounting surface 11 and is used for accommodating and limiting the housing 31; the contour member 2 is provided with a second mounting surface 2121 and a contour channel 2a, the second mounting surface 2121 abuts against the first mounting surface 11 for limiting, the contour channel 2a penetrates through the second mounting surface 2121 and is communicated with the limiting channel 1a, the contour channel 2a is used for accommodating and limiting the sound outlet mouth 32, and the extension length of the contour channel 2a is larger than that of the sound outlet mouth 32.

In this embodiment, mounting 1 and profiling 2 are two mould structures of earphone test fixture, and mounting 1 and profiling 2 accessible joint, spiro union, modes such as grafting are connected fixedly, and when mounting 1 and profiling 2 are connected fixedly, the first fitting surface 11 of mounting 1 and the second fitting surface 2121 butt of profiling 2 are spacing.

The fixing member 1 is provided with a limiting channel 1a for installing and fixing the earphone 3, the limiting channel 1a can be a channel structure arranged through the fixing member 1, and the shape and the size of the limiting channel can be matched with the shape and the size of the shell 31 of the earphone 3 so as to reliably limit and fix the earphone 3. Since the cross-sectional area of the sound outlet mouth 32 of the earphone 3 is usually smaller than the cross-sectional area of the housing of the earphone 3, the size of the limiting channel 1a can be designed to satisfy: when the housing of the earphone 3 is mounted and limited in the limiting channel 1a, the sound outlet 32 of the earphone 3 can extend out of the limiting channel 1a through the opening of the limiting channel 1a and be accommodated and limited in the profiling channel 2 a. For example, the limiting channel 1a may be designed such that the cross-sectional area of the limiting channel 1a gradually increases from the end close to the first fitting surface 11 to the end far from the first fitting surface 11. The fixing part 1 is positioned above the profiling part 2, so that the earphone 3 can be more stably limited in the limiting channel 1a by utilizing the self weight of the earphone 3, and the earphone 3 is not easy to move in the extending direction of the limiting channel 1a and slip off the fixing part 1.

The profile element 2 is provided with a profile channel 2a which can accommodate and limit the sound outlet mouth 32 of the earphone 3, the profile channel 2a can be a channel structure penetrating through the profile element 2, and the shape and the size of the profile channel can be matched with the shape and the size of the sound outlet mouth 32 of the earphone 3 so as to reliably limit and fix the earphone 3. The second assembling surface 2121 of the profile element 2 is abutted and limited with the first assembling surface 11 of the fixing element 1, the profile channel 2a of the profile element 2 penetrates through the second assembling surface 2121, the limiting channel 1a of the fixing element 1 penetrates through the first assembling surface 11, and when the first assembling surface 11 is abutted and limited with the second assembling surface 2121, the limiting channel 1a is communicated with the profile channel 2 a. When the earphone 3 is fixedly installed on the earphone testing jig, the shell 31 of the earphone 3 is accommodated and limited in the limiting channel 1a, the sound outlet 32 of the earphone 3 penetrates through the limiting channel 1a and extends into the profiling channel 2a, and the sound outlet 32 of the earphone 3 is accommodated and limited in the profiling channel 2 a. The extended length of the profiling channel 2a is greater than the extended length of the sound outlet 32, so that the sound outlet 32 is entirely located in the profiling channel 2a without having a structure protruding outside the profiling channel 2a, so that the earphone testing device can collect the sound output from the sound outlet 32 through the profiling channel 2 a. With this, the shell 31 of earphone 3 is spacing with spacing passageway 1 a's inner wall butt, earphone 3's play sound mouth 32 is spacing with the inner wall butt of profile modeling passageway 2a, profile modeling 2 cup joints fixedly through profile modeling passageway 2a and play sound mouth 32, earphone 3 will propagate to earphone test equipment in through profile modeling passageway 2a through the sound that play sound mouth 32 sent, and difficult sound leakage that appears, so can ensure the uniformity of different earphone 3 testing environment in the test link, be favorable to promoting earphone 3 acoustic performance test's accuracy and reliability.

In an embodiment of the utility model, illustrated in fig. 1, cam 2 of the above-described embodiment comprises a first cam 21 and a second cam 22; the first cam 21 is fixed between the fixing member 1 and the second cam 22 in a limited manner, a second mounting surface 2121 is arranged on the side of the first cam 21 facing away from the second cam 22, the first cam 21 is provided with a limiting hole 213a penetrating through the second mounting surface 2121, and at least part of the structure of the sound outlet nozzle 32 is accommodated and limited in the limiting hole 213 a; the second contour 22 has a sound guide hole 22a, and the sound guide hole 22a is communicated with the limiting hole 213a to form a contour channel 2 a.

In this embodiment, when the earphone 3 is actually used, the sound outlet 32 of the earphone 3 is sleeved with an earcap, and when the earphone 3 is inserted into the ear canal of the ear of a human body in an ear insertion or half-in-ear wearing manner, the space inside the sound outlet 32 of the earphone 3, the space inside the earcap, and the space inside the ear canal of the human body are communicated with each other to form a relatively closed cavity space. Therefore, in the present embodiment, the first copying member 21 simulates an earmuff which is copy-sleeved on the sound outlet mouth 32, the limiting hole 213a of the first copying member 21 and the sound guiding hole 22a of the second copying member 22 simulate a space inside the copy earmuff and an internal space existing when the ear canal of the human body is plugged into the earmuff, the first copying member 21 and the second copying member 22 simulate a state when the earmuff is sleeved on the sound outlet mouth 32 of the earphone 3 and worn on the ear of the human body in an ear wearing manner, so that acoustic performance parameters of the earphone 3 in a wearing state can be obtained, and accurate testing of acoustic performance of the earphone 3 is realized.

In an embodiment of the present invention, as shown in fig. 1, the first cam 21 in the above embodiment includes a fitting portion 212 and a limiting portion 213; the fitting portion 212 is clamped and fixed with the fixing member 1 and the second cam member 22, the fitting portion 212 is provided with a second fitting surface 2121 and a through cavity 212a penetrating through the second fitting surface 2121, and the limiting portion 213 is arranged in the through cavity 212a in a penetrating manner and is provided with a limiting hole 213 a.

In this embodiment, the assembling portion 212 may be disposed between the fixing member 1 and the second cam 22, and the opposite ends of the assembling portion 212 are clamped and fixed to the fixing member 1 and the second cam 22. The through cavity 212a may be a channel structure disposed through the mounting portion 212, the second mounting surface 2121 is disposed on a side of the mounting portion 212 facing the fixing member 1, and the through cavity 212a is disposed through the second mounting surface 2121 and communicates with the limiting channel 1 a. The limiting part 213 is located in the through cavity 212a of the assembling part 212, and at least part of the limiting part 213 is abutted with the inner wall of the through cavity 212a for limiting, so that the limiting part 213 is fixed in the through cavity 212 a. The limiting hole 213a may be a through hole structure penetrating through the limiting portion 213, and the extending direction of the limiting hole 213a may be the same as the extending direction of the through cavity 212a and the extending direction of the limiting channel 1a, so as to improve the coaxiality of the limiting channel 1a, the limiting hole 213a and the through cavity 212a, so that the housing 31 and the mouthpiece 32 of the earphone 3 can be more reliably mounted and fixed on the fixing member 1, the first cam 21 and the second cam 22.

In this embodiment, the fixing member 1 and the second cam 22 are clamped and fixed, so that the fixing member 1, the first cam 21 and the second cam 22 can be conveniently detached from each other, and one or more modules of different earphones 3 to be tested can be adaptively replaced and selected. For example, different holders 1 may have different shapes and sizes of the limiting channel 1a to fit different housings 31 of earphones 3; different first cams 21 may have different fitting portions 212 and stopper portions 213 to adapt to different sound mouths 32 of headphones 3; different second cams 22 may have different sound guiding holes 22a to fulfill the test requirements of different headphones 3. Different mounting 1, first profile 21 and second profile 22 accessible realize corresponding joint fixedly with the same set of joint structure, so can promote this earphone test fixture's suitability.

In an embodiment of the present invention, referring to fig. 2 in combination with fig. 1, the position-limiting portion 213 in the above embodiment includes an elastic sleeve 2131 and a restraining sleeve 2132; the binding sleeve 2132 is sleeved on the periphery of the elastic sleeve 2131 and is abutted and limited with the inner wall of the through cavity 212 a; the elastic sleeve 2131 is provided with a limiting hole 213a, and the binding sleeve 2132 is used for preventing the elastic sleeve 2131 from deforming in the radial direction.

In this embodiment, the elastic sleeve 2131 is made of soft rubber such as silica gel, so as to prevent the elastic sleeve 2131 from scratching or scratching the sound outlet 32 when the sound outlet 32 is sleeved with the sound outlet 2131, protect the sound outlet 32, and meanwhile, the elastic sleeve 2131 also elastically stretches and contracts and hoops the sound outlet 32, so that the outer wall of the sound outlet 32 of the earphone 3 is tightly attached to the inner wall of the elastic sleeve 2131, thereby preventing the sound emitted by the sound outlet 32 from leaking between the sound outlet 32 and the elastic sleeve 2131, and ensuring the reliability of the performance test of the earphone 3.

The constraint sleeve 2132 is made of hard materials such as plastic, the periphery of the elastic sleeve 2131 is sleeved with the constraint sleeve 2132 and is in sealing connection with the elastic sleeve 2131, the constraint sleeve 2132 constrains the elastic sleeve 2131 and blocks radial deformation of the elastic sleeve 2131, deformation of the elastic sleeve 2131 due to disassembly and assembly of different sound outlets 32 in the process of multiple testing and use is prevented, the testing environment of the earphone 3 and the data acquisition consistency of the earphone 3 in multiple tests of the earphone testing jig are guaranteed as far as possible, and the accuracy and reliability of the performance test of the earphone 3 are improved.

Optionally, the elastic sleeve 2131 and the restraining sleeve 2132 are of an integrally formed structure. The elastic sleeve 2131 and the constraint sleeve 2132 are made of different materials, the elastic sleeve 2131 and the constraint sleeve 2132 can be integrally formed through injection molding by a double-color injection molding process, so that the processing procedures and the cost of the elastic sleeve 2131 and the constraint sleeve 2132 are saved, meanwhile, the tightness of connection between the elastic sleeve 2131 and the constraint sleeve 2132 is improved, the elastic sleeve 2131 and the constraint sleeve 2132 are in sealed connection, the sound emitted by the sound emitting nozzle 32 is prevented from leaking between the elastic sleeve 2131 and the constraint sleeve 2132, and the reliability of the earphone testing jig in performance testing of the earphone 3 is improved.

In an embodiment of the present invention, as shown in fig. 1, the second mounting surface 2121 of the above embodiment is formed with a first protrusion 2122, and the through cavity 212a penetrates through the first protrusion 2122; the first assembling surface 11 is formed with a first limiting groove 1b, and the first protrusion 2122 is clamped and fixed in the first limiting groove 1 b.

In this embodiment, at least a portion of the first protrusion 2122 is received in the first limiting groove 1b, and the outer peripheral wall of the first protrusion 2122 abuts against and limits the groove wall of the first limiting groove 1b, so that the first protrusion 2122 is clamped and fixed to the first limiting groove 1 b. The clamping cooperation of first protrusion 2122 and first spacing groove 1b can make things convenient for the dismouting of mounting 1 and first profile 21, also can promote the reliability when mounting 1 and first profile 21 are connected fixedly simultaneously, reliability when guaranteeing this earphone test fixture to test earphone 3 performance.

In an embodiment of the present invention, as shown in fig. 1, a second protrusion 221 is disposed on a side of the second cam 22 facing the first cam 21, and the sound guide hole 22a penetrates through the second protrusion 221; the end of the limiting portion 213 away from the second mounting surface 2121 is provided with a second limiting groove 213b, the second limiting groove 213b is communicated with the limiting hole 213a, and the second protrusion 221 is fixed in the second limiting groove 213b in a clamping manner.

In this embodiment, at least a portion of the second protrusion 221 is accommodated in the second limiting groove 213b, and the outer peripheral wall of the second protrusion 221 abuts against and limits the groove wall of the second limiting groove 213b, so that the second protrusion 221 is clamped and fixed with the second limiting groove 213 b. First profile 21 passes through the joint cooperation of second arch 221 and second spacing groove 213b and can dismantle with second profile 22 and be connected, has made things convenient for the installation between first profile 21 and the second profile 22 fixed with dismantle, also can promote the reliability when first profile 21 and second profile 22 are connected fixedly simultaneously, guarantees the reliability when this earphone test fixture tests earphone 3 performance.

In an embodiment of the present invention, as shown in fig. 1, the outer peripheral wall of the second protrusion 221 in the above embodiment is provided with a first limiting step 2211, the inner wall of the through cavity 212a is provided with a second limiting step 2123, and the first limiting step 2211 abuts against the second limiting step 2123 for limiting.

In this embodiment, the first limiting step 2211 and the second limiting step 2123 are adaptive step structures, when the second protrusion 221 is in snap fit with the second limiting groove 213b, the second protrusion 221 extends into the through cavity 212a, and a surface of the first limiting step 2211 abuts against a surface of the second limiting step 2123 for limiting, so that the second cam 22 cannot move laterally relative to the first cam 21, thereby further improving the reliability of the connection fit between the second cam 22 and the first cam 21.

In an embodiment of the utility model, as shown in fig. 1, cam 2 of the above-described embodiment further comprises a third cam 23; the third cam 23 is detachably connected to the second cam 22, and the third cam 23 is provided with a sound pickup cavity 23a communicating with the sound guide hole 22 a.

In the present embodiment, the third cam 23 is configured to follow the design of human ear and is used to receive the sound output from the sound outlet 32 of the earphone 3, and the sound pickup cavity 23a of the third cam 23 can be communicated with an earphone testing device through a pipeline so as to collect the sound output from the earphone 3 by the earphone testing device and test the acoustic performance of the earphone 3. First imitative piece 21, the testing environment of the in-ear earphone 3 that has the earmuff is inserted into in the human duct of second imitative piece 22 and the combination simulation of third imitative piece 23, when making earphone 3 install and fix on this earphone test fixture, provide the scene environment when more being close to the reality and being worn the use for earphone 3 through this earphone test fixture, thereby be favorable to acquireing the real acoustic performance data when earphone 3 is used by the user, and then accessible rear end debugging makes earphone 3 can accord with anticipated acoustic performance, with this sense of hearing when promoting the user and using earphone 3.

In an embodiment of the present invention, as shown in fig. 1, one end of the second cam 22, which is far away from the first cam 21, is provided with a third limiting groove 22b, the third limiting groove 22b is communicated with the sound guide hole 22a, and at least part of the structure of the third cam 23 is clamped and fixed in the third limiting groove 22 b.

In this embodiment, the outer peripheral wall of the third cam 23 abuts against and limits the groove wall of the third limiting groove 22b, so that the third cam 23 is clamped and fixed with the third limiting groove 22 b. Second profile 22 passes through third profile 23 and third spacing groove 22 b's joint cooperation and can dismantle with third profile 23 and be connected to this has made things convenient for the installation between second profile 22 and the third profile 23 fixed with dismantle, also can promote the reliability when second profile 22 and the third profile 23 are connected fixedly simultaneously, guarantees the reliability when this earphone test fixture tests earphone 3 performance.

The above description is only an alternative embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. The utility model provides an earphone test fixture for the capability test of earphone, the earphone has the shell and locates the sound outlet mouth of shell, its characterized in that, earphone test fixture includes:

2. The earphone test fixture of claim 1 wherein the cam includes a first cam and a second cam;

3. The earphone test fixture of claim 2, wherein the first contour includes a fitting portion and a limiting portion;

4. The testing fixture of claim 3, wherein the limiting portion comprises an elastic sleeve and a binding sleeve;

5. The apparatus according to claim 4, wherein the elastic sleeve and the constraining sleeve are integrally formed.

6. The apparatus according to claim 3, wherein the second mounting surface has a first protrusion formed thereon, and the through cavity extends through the first protrusion;

7. The earphone test fixture of claim 3 wherein a second protrusion is disposed on a side of the second cam facing the first cam, and the sound guide hole penetrates through the second protrusion;

8. The apparatus according to claim 7, wherein the outer peripheral wall of the second protrusion has a first limiting step, the inner wall of the through cavity has a second limiting step, and the first limiting step and the second limiting step are abutted and limited.

9. The earphone test fixture of any one of claims 2-7 wherein the cam further comprises a third cam;

10. The testing fixture of claim 9, wherein a third limiting groove is disposed at an end of the second cam member away from the first cam member, the third limiting groove is communicated with the sound guide hole, and at least a portion of the third cam member is clamped and fixed in the third limiting groove.