CN211347267U - Air tightness test system - Google Patents

Air tightness test system Download PDF

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Publication number
CN211347267U
CN211347267U CN201922419922.7U CN201922419922U CN211347267U CN 211347267 U CN211347267 U CN 211347267U CN 201922419922 U CN201922419922 U CN 201922419922U CN 211347267 U CN211347267 U CN 211347267U
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China
Prior art keywords
test
clamp
cavity
groove
gas
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Active
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CN201922419922.7U
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Chinese (zh)
Inventor
郭森
陈良
徐廷旺
李朝武
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Shenzhen Voxtech Co Ltd
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Shenzhen Voxtech Co Ltd
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Abstract

The application discloses gas tightness test system, this gas tightness test system include first anchor clamps, second anchor clamps, drive assembly, accuse gas subassembly and determine module. The first clamp is provided with a first test cavity for placing a test piece; the second clamp is provided with a second test cavity for placing the standard component; the driving assembly is connected to the first clamp and the second clamp and used for driving the first clamp to open or close the first test cavity and driving the second clamp to open or close the second test cavity; the gas control assembly is connected with the first test cavity and the second test cavity and used for inputting or extracting gas with the same pressure in the first test cavity and the second test cavity; the detection assembly is used for detecting the gas pressure difference of the first test chamber and the second test chamber. This application can automated inspection test piece's gas tightness, and it is relatively higher to detect the precision.

Description

Air tightness test system
Technical Field
The application relates to the technical field of air tightness testing, in particular to an air tightness testing system.
Background
After some devices are fabricated, it is generally necessary to test the device for hermetic properties, etc. Generally, a pointer type pressure gauge is adopted, the whole process of the air tightness test is manually operated, the process is backward, the efficiency is low, and the test precision is poor due to the fact that human factors have large influences.
SUMMERY OF THE UTILITY MODEL
The application provides an air tightness test system, can automatic test, the measuring accuracy is higher.
In order to solve the technical problem, the application provides an air tightness testing system which comprises a first clamp, a second clamp, a driving assembly, an air control assembly and a detection assembly;
the first clamp is provided with a first test cavity for placing a test piece;
the second clamp is provided with a second test cavity for placing the standard component;
the driving assembly is connected to the first clamp and the second clamp and used for driving the first clamp to open or close the first test cavity and driving the second clamp to open or close the second test cavity;
the gas control assembly is connected with the first test cavity and the second test cavity and used for inputting or extracting gas with the same pressure in the first test cavity and the second test cavity;
the detection assembly is used for detecting the gas pressure difference of the first test chamber and the second test chamber.
The first clamp comprises a first sealing structure which is arranged in a first testing cavity in a surrounding mode, the first sealing structure enables the first clamp to form a first cavity, and a first through hole is formed in the first clamp and is communicated with the first cavity and the external environment;
the second clamp comprises a second sealing structure arranged in the second testing cavity in a surrounding mode, the second sealing structure enables the second clamp to form a second cavity, and a second through hole is formed in the second clamp and communicated with the second cavity and the external environment.
The first clamp and the second clamp respectively comprise an upper template and a lower template, an upper groove is formed in the upper template, a lower groove is formed in the lower template, the driving assembly is connected to the upper template, and the driving upper template is pressed on the lower template, so that the upper groove and the lower groove form a testing cavity.
The lower groove is a semi-annular groove, an inner sealing ring is arranged on the inner side of the lower groove, and an outer sealing ring is arranged on the outer side of the lower groove; and a through hole communicated with the external environment is arranged in the region enclosed by the inner sealing ring of the lower template or the position of the upper template corresponding to the region enclosed by the inner sealing ring.
The lower template is provided with a convex block which is matched with a device to be tested, and the lower groove comprises a containing groove formed on the convex block.
The lug is connected to the lower template through a fixing piece, the fixing piece is inserted into the fixing hole in the lower template, and a third through hole communicated with the fixing hole is formed in the fixing piece.
The fixing piece is a bolt, and the third through hole penetrates through the bolt in the axial direction of the bolt.
The device to be tested is an earphone which comprises a semicircular connecting part, two ear wearing parts respectively connected to two ends of the connecting part, and two sound generating parts respectively connected to the two ear wearing parts;
the lower groove also comprises a connecting part groove and a sounding part groove, and the connecting part groove, the accommodating groove and the sounding part groove are arranged in a separated manner;
when the upper template is pressed on the lower template, the upper groove enables the connecting part groove, the accommodating groove and the sounding part groove to form a communicated test cavity.
Wherein, the wall of the lower groove is provided with an air inlet hole, and the air control component is communicated with the air inlet hole.
Wherein the driving assembly simultaneously drives the first clamp and the second clamp to simultaneously open or close the first test chamber and the second test chamber.
The test piece can be placed in a first test cavity in a first clamp, the standard piece is placed in a second test cavity in a second clamp, then the first test cavity and the second test cavity are controlled to be closed by the driving assembly, gas is input into the first test cavity and the second test cavity by the gas control assembly, then the airtightness of the test piece can be detected by detecting the gas pressure difference in the first test cavity and the second test cavity by the detecting assembly, after detection is completed, the gas in the first test cavity and the second test cavity can be extracted by the gas control assembly, then the first test cavity and the second test cavity can be controlled to be opened by the driving assembly, so that the standard piece and the test piece can be conveniently taken out from the first test cavity and the second test cavity, and therefore the airtightness test system can automatically test the airtightness of the test piece and is relatively high in test precision.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic structural diagram of an embodiment of a gas tightness test system of the present application;
FIG. 2 is an exploded view of an embodiment of a first fixture and a second fixture of the hermeticity test system of the present application;
FIG. 3 is a schematic structural diagram of an embodiment of an upper plate in the hermetic sealing test system of the present application;
FIG. 4 is a schematic structural diagram of an embodiment of a lower template in the air-tightness testing system of the present application;
FIG. 5 is a partial schematic view of area A of the lower platen shown in FIG. 4;
fig. 6 is a schematic structural diagram of an embodiment of the earphone according to the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
After some devices are fabricated, it is necessary to test the hermeticity performance, etc. of the devices. The hermeticity of the device may be tested by a hermeticity testing system.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a hermeticity test system according to the present application. As shown in fig. 1, the airtightness testing system 1 includes a first jig 100, a second jig 200, a driving assembly 300, a gas control assembly 400 and a detection assembly 500.
The first jig 100 is formed with a first test chamber 130 for placing a test piece.
The second jig 200 is formed with a second test chamber 230 for placing a standard.
The driving assembly 300 is connected to the first and second clamps 100 and 200 for driving the first clamp 100 to open or close the first test chamber 130 and the second clamp 200 to open or close the second test chamber 230.
The gas control module 400 is connected to the first test chamber 130 and the second test chamber 230, and is used for inputting or exhausting gas of the same pressure in the first test chamber 130 and the second test chamber 230.
The sensing assembly 500 is used to sense the gas pressure difference between the first testing chamber 130 and the second testing chamber 230.
During testing, a test piece is placed in the first test chamber 130 in the first fixture 100, a standard piece is placed in the second test chamber 230 in the second fixture 200, then the driving assembly 300 controls the first test chamber 130 and the second test chamber 230 to be closed, the gas control assembly 400 inputs gas with the same pressure into the first test chamber 130 and the second test chamber 230, then the gas pressure difference between the first test chamber 130 and the second test chamber 230 is detected through the detection assembly 500 to detect the gas tightness performance of the test piece, after the detection is completed, the gas control assembly 400 can extract the gas in the first test chamber 130 and the second test chamber 230, and then the driving assembly 300 can control the first test chamber 130 and the second test chamber 230 to be opened to facilitate the test piece and the standard piece to be taken out from the first test chamber 130 and the second test chamber 230.
In this embodiment, the steps of inflating the first and second test chambers 130 and 230 and checking the gas pressure difference may include: inflation-balance-small leakage-large leakage-deflation.
Specifically, in the inflation phase, after the amount of gas input into the first testing chamber 130 and the second testing chamber 230 reaches a first preset value or the time for inputting the gas reaches a second preset value, the gas control assembly 400 may stop inputting the gas into the first testing chamber 130 and the second testing chamber 230, and the pressure in the first testing chamber 130 and the pressure in the second testing chamber 230 are the same in a period of time thereafter, that is, in an equilibrium state. After a period of time of equilibrium, if the test piece has a small leak hole, the gas in the first test chamber 130 will enter the test piece through the leak hole of the test piece, the gas pressure in the first test chamber 130 will decrease, and the detecting component 500 will detect the difference between the gas pressure in the first test chamber 130 and the gas pressure in the second test chamber 230. When the difference detected by the detection assembly 500 is greater than the first threshold, the test piece can be judged to be a small-leakage unqualified product, and the air release stage is started. If a period of small-leakage testing has elapsed, the difference detected by the detection component 500 is less than or equal to the first threshold, and a large-leakage testing phase may be entered. In the large leakage test, the first test chamber 130 is communicated with a first gas container, the second test chamber 230 is communicated with a second gas container, the gas in the first test chamber 130 is injected into the first gas container, the gas in the second test chamber 230 is injected into the second gas container, and after a period of time, the detection assembly 500 detects the difference value between the gas pressure of the first test chamber 130 and the gas pressure of the second test chamber 230; if the pressure difference exceeds a second threshold value, judging that the test piece is a large-leakage unqualified product, and entering an air release stage; if the pressure difference is not beyond the specified range, the test piece is judged to be a qualified product, and the air release stage is started. During the deflation phase, the gas within the first test chamber 130 and the second test chamber 230 is evacuated.
Wherein the driving assembly 300 may simultaneously drive the first clamp 100 and the second clamp 200 to simultaneously open or close the first test chamber 130 and the second test chamber 230.
In one implementation, the driving assembly 300 may include first and second driving devices that drive the first and second clamps 100 and 200, respectively.
In another implementation, the drive assembly 300 may include a single drive device. An output shaft of the driving device is connected with the first clamp 100 and the second clamp 200 through a connecting frame, so that when the output shaft of the driving device extends out, the first clamp 100 and the second clamp 200 are closed simultaneously; when the output shaft of the driving device is retracted, the first clamp 100 and the second clamp 200 are simultaneously opened.
In this embodiment, the driving assembly 300 may include a cylinder, a motor, or other driving means.
Alternatively, gas control assembly 400 may include a gas tank, a gas inlet tube, a first manifold, a second manifold, and a gas container. The sensing assembly 500 may include a differential pressure sensor.
Specifically, the gas tank is connected to the first test chamber 130 and the second test chamber 230 through two gas inlet pipes, respectively, and the first test chamber 130 and the second test chamber 230 may be inflated through the gas inlet pipes.
Alternatively, the first branch pipe may be provided with two. One end of each first branch pipe is connected with an air inlet pipe. The other end of each first branch pipe is connected with an air inlet of the differential pressure sensor. The first test chamber 130 communicates with one inlet pipe and one first branch pipe, and the second test chamber 230 communicates with the other inlet pipe and the other first branch pipe. When the gas tank no longer inflates the first test chamber 130 and the second test chamber 230, the differential pressure sensor can detect the differential pressure between the first test chamber 130 and the second test chamber 230, and a small leak test can be performed.
Alternatively, both the second branch and the gas container may be provided with two. One end of each second branch pipe is connected with an air inlet pipe. The other end of each second branch pipe is connected with a gas container. The first test chamber 130 communicates with one gas inlet pipe, one first branch pipe, one second branch pipe, and one gas container, and the second test chamber 230 communicates with the other gas inlet pipe, the other first branch pipe, the other second branch pipe, and the other gas container. After the gas tank finishes filling the first test chamber 130 and the second test chamber 230, the differential pressure sensor can detect the differential pressure of the first test chamber 130 and the second test chamber 230, and a large leakage test can be performed.
It will be appreciated that valves may be provided in each tube to facilitate control of the gas flow direction in each tube.
As shown in fig. 2, in the present embodiment, the first fixture 100 may include a first sealing structure surrounding the first test chamber 130. The first sealing structure enables the first clamp 100 to form a first cavity, and the first clamp 100 is provided with a first through hole for communicating the first cavity with the external environment. Therefore, the first testing cavity 130 can be prevented from air fluctuation caused by the existence of the first cavity which is not communicated with the external environment, so that the pressure difference detected by the detection assembly 500 is prevented from fluctuation due to the first cavity, and the accuracy of the air tightness testing result is ensured.
The second clamp 200 includes a second sealing structure enclosing the second test chamber 230. The second sealing structure enables the second clamp 200 to form a second cavity, and a second through hole is formed in the second clamp 200 and communicates the second cavity with the external environment. This can prevent the second testing chamber 230 from having gas fluctuation due to the existence of the second cavity not communicating with the external environment, thereby preventing the pressure difference detected by the detecting assembly 500 from fluctuating due to the second cavity and ensuring the accuracy of the airtightness testing result.
In one implementation, the first and second test chambers 130 and 230 may be annular structures. The first and second sealing structures may be disposed around the inner rings of the first and second test chambers 130 and 230, respectively. So that the first test chamber 130 is sleeved on the periphery of the first cavity formed by the first sealing structure and the first fixture 100. The second testing chamber 230 is sleeved on the periphery of a second cavity formed by the second sealing structure and the second fixture 200.
In another implementation, the first test chamber 130 and the second test chamber 230 may be of any configuration. The first and second sealing structures may be disposed around the periphery of the first and second test chambers 130 and 230. So that the first sealing structure, the periphery of the first testing chamber 130 and the first cavity formed by the first fixture 100 can be sleeved on the periphery of the first testing chamber 130. The second sealing structure, the periphery of the second testing chamber 230 and a second cavity formed by the second fixture 200 can be sleeved on the periphery of the second testing chamber 230.
Optionally, with continued reference to fig. 2, the first fixture 100 and the second fixture 200 each include an upper platen 120 and a lower platen 110. The driving assembly 300 is connected to the upper template 120, and drives the upper template 120 to be pressed on the lower template 110, so that the upper template 120 and the lower template 110 cooperate to form a testing chamber. Specifically, in the test use, the driving assembly 300 drives the upper mold plate 120 to be pressed against the lower mold plate 110. When not in the testing state, the upper plate 120 may or may not be pressed against the lower plate 110.
Further, referring to fig. 3, an upper groove 122 is formed on the upper mold plate 120, a lower groove 111 is formed on the lower mold plate 110, and the upper groove 122 and the lower groove 111 cooperate to form a testing chamber. In other embodiments, only one of the upper and lower templates 120, 110 may be formed with a groove that cooperates with the other of the upper and lower templates 120, 110 to form a test chamber.
Wherein, the lower groove 111 may be a semi-annular groove. The inner side of the lower groove 111 may be provided with an inner sealing ring and the outer side of the lower groove 111 may be provided with an outer sealing ring. The semi-ring is not strictly a semi-ring, and may be a non-closed ring. And the lower groove 111 may be generally in an arcuate, isotactic shape, or may be in an irregular shape. It is understood that the outer sealing ring may cooperate with the lower platen 110 and the upper platen 120 to form a cavity. The inner sealing ring arranged on the inner side of the lower groove 111 can divide the cavity into a sub-cavity and a testing cavity used for containing a testing piece or a standard piece, and the volume of the testing cavity used for containing the testing piece or the standard piece can be reduced, so that when the pressure in the testing cavity slightly changes, the pressure change condition can be accurately tested, and the sensitivity of the air tightness test is improved.
In an implementation manner, the lower mold plate 110 may be provided with a seal ring groove 118 for accommodating the inner seal ring and the outer seal ring, so that the inner seal ring and the outer seal ring can be conveniently disposed, and the inner seal ring and the outer seal ring can be prevented from being displaced, thereby avoiding affecting the air tightness test result.
In another implementation, the inner seal ring and the outer seal ring may be fixed to the lower mold plate 110 or the upper mold plate 120 by bonding.
Optionally, the lower plate 110 may be provided with a through hole 113 in the inner seal ring surrounding area. Through setting up through-hole 113 can communicate sub-cavity with external environment, prevent to make the test chamber take place gas fluctuation because of the existence of the sub-cavity with external environment intercommunication, avoid influencing the gas tightness test result to guarantee the accuracy of gas tightness test result.
It is understood that the upper plate 120 may be provided with a through hole 113 at a position corresponding to the region surrounded by the inner seal ring.
In this embodiment, the lower plate 110 is provided with a bump 112 for accommodating a standard or test piece. The lower groove 111 may include a receiving groove 1112 formed on the protrusion 112 for supporting and fixing the standard or test piece.
In one implementation, the tab 112 may be integrally formed with the lower plate 110.
As shown in fig. 4 and 5, in another implementation, the protrusion 112 is connected to the lower mold plate 110 through a fixing member 114, so as to avoid the difficulty in manufacturing the protrusion 112 and the lower mold plate 110 being increased due to integral molding. The fixing member 114 may be a bolt, a stud, a screw, a rivet, or the like.
In addition, the fixing member 114 may be inserted into a fixing hole 115 of the lower plate 110. The fixing member 114 is provided with a third through hole 1141 communicating with the fixing hole 115.
The inventor of the present application finds that, when the protrusion 112 is fixed on the lower mold plate 110 by the fixing member 114, a certain acting force is applied to the fixing member 114 by the gas in the fixing hole 115 and the gas in the accommodating groove 1112, when the fixing hole 115 is not communicated with the accommodating groove 1112, and when the airtightness performance of the device is tested, the pressure in the accommodating groove 1112 changes, and the pressure in the fixing hole 115 does not change or only slightly changes, so that only the force applied to the fixing member 114 by the gas in the accommodating groove 1112 in the force applied to the fixing member 114 changes, and the force applied to the fixing member 114 is unbalanced, which may cause the fixing member 114 to move, thereby affecting the airtightness test result. Therefore, the fixing hole 115 is communicated with the accommodating groove 1112 through the third through hole 1141, so that the unbalanced stress of the fixing member 114 can be prevented, and the fixing member 114 is prevented from moving due to the pressure change of the accommodating groove 1112.
In addition, due to the problem of the working accuracy, the volumes of the second fixture 200 and the first fixture 100 with respect to the fixing hole 115 are not consistent, and the fixing member 114 may not be completely matched with the fixing hole 115, so that the fixing hole 115 cannot be blocked, and during the airtight test, the amount of gas leaking from the accommodating groove 1112 to the fixing hole 115 within the same amount of time may be different, so that the difference between the gas pressure in the second test chamber 230 of the second fixture 200 and the gas pressure in the first test chamber 130 of the first fixture 100 may occur due to the different amount of gas leaking, and the error of the gas pressure difference measured during the airtight test may occur. The inventor of the present application finds that, compared to the case where the fixing hole 115 is not communicated with the accommodating groove 1112, after the third through hole 1141 is added to communicate the fixing hole 115 with the accommodating groove 1112, after the test chamber is filled with gas of a certain pressure in the second fixture 200 and the first fixture 100 during the air tightness test, the gas pressure of the fixing hole 115 is the same as the gas pressure of the accommodating groove 1112, and therefore the problem of gas leakage caused by the difference between the gas pressure of the fixing hole 115 and the gas pressure of the accommodating groove 1112 may not occur, and therefore, the error caused by the difference in gas entering amount may be avoided.
The third through hole 1141 may connect the fixing hole 115 and the accommodating groove 1112, and the specific arrangement position may not be limited. Preferably, the third through hole 1141 penetrates the fixing member 114 in the axial direction of the fixing member 114, so as to reduce the difficulty in forming the third through hole 1141 on the fixing member 114.
Further, as shown in fig. 6, the half-ring device may be an earphone 200. The earphone 200 may include a semi-annular connection part 210, two ear wearing parts 220 respectively connected to both ends of the semi-annular connection part 210, and two sound emitting parts 230 respectively connected to the two ear wearing parts 220. The headset 200 may be a bone conduction headset or other headset.
Accordingly, as shown in fig. 4, the lower groove 111 includes a connection portion groove 1111, a projection 112, and a sound emitting portion groove 1113. The protrusion 112 may have a receiving groove 1112 formed thereon. The connection portion recess 1111, the receiving groove 1112, and the sound emitting portion recess 1113 are separately provided.
Specifically, as shown in fig. 3, the upper plate 120 is provided with an upper groove 122 corresponding to the protrusion 112 and the sound-emitting portion groove 1113, and when the upper plate 120 is pressed on the lower plate 110, the upper groove 122 makes the connecting portion groove 1111, the receiving groove 1112 and the sound-emitting portion groove 1113 constitute a communicating test chamber. The upper groove 122 of the upper template 120 is matched with the connecting part groove 1111, the accommodating groove 1112 and the sounding part groove 1113 of the lower template 110 to form a test cavity, and the test cavity can be matched with the earphone 200, so that the accuracy of the air tightness test result can be improved.
To facilitate the inflation of the test chamber, as shown in fig. 2 and 4, air inlet holes 116 may be formed on the groove wall of the lower groove 111. Moreover, the air control assembly 400 is communicated with the air inlet 116.
Specifically, when the semi-ring shaped device is the earphone 200, an air intake hole 116 may be formed on a groove wall of the connection portion recess 1111.
The air intake 116 may be in communication with the test chamber. It will be appreciated that in testing the air tightness of the earphone 200, the test chamber may be inflated through the air inlet holes 116, and when the air is inflated to a certain extent, the inflation may be stopped, and then the pressure change in the test chamber may be tested. Also, the air intake holes 116 can be used for exhaust after the test is completed.
In one implementation, the air intake holes 116 can be two blind holes disposed in the lower platen 110 that communicate with each other. Wherein, the opening part of two blind holes is linked together with the intake pipe in test chamber and the gas tightness test system 1 respectively to the intake pipe can be aerifyd to test intracavity portion through two blind holes.
In another implementation, the air intake holes 116 may also be through holes disposed on the groove wall of the lower groove 111. Two ports of the through hole on the groove wall are respectively communicated with the test cavity and the air inlet pipe, so that the test cavity can be inflated through the through hole on the groove wall, and the required processing precision is reduced.
As shown in fig. 2, further, a first positioning structure 117 may be formed on the outer side of the outer sealing ring, and cooperate with a second positioning structure 121 on the upper template 120, so that the upper template 120 is accurately pressed on the lower template 110. The first positioning structure 117 and the second positioning structure 121 may be positioning posts and positioning holes that are matched with each other.
The above embodiments are merely examples and are not intended to limit the scope of the present disclosure, and all modifications, equivalents, and flow charts using the contents of the specification and drawings of the present disclosure or those directly or indirectly applied to other related technical fields are intended to be included in the scope of the present disclosure.

Claims (10)

1. An air-tightness testing system, characterized in that it comprises:
the first clamp is provided with a first test cavity for placing a test piece;
the second clamp is provided with a second test cavity for placing the standard component;
the driving assembly is connected to the first clamp and the second clamp and used for driving the first clamp to open or close the first test cavity and driving the second clamp to open or close the second test cavity;
the gas control assembly is connected with the first test cavity and the second test cavity and used for inputting or extracting gas with the same pressure in the first test cavity and the second test cavity;
and the detection assembly is used for detecting the gas pressure difference of the first test chamber and the second test chamber.
2. The test system of claim 1, wherein the first clamp comprises a first sealing structure surrounding the first test chamber, the first sealing structure enables the first clamp to form a first cavity, and a first through hole is formed in the first clamp and communicates the first cavity with an external environment;
the second clamp comprises a second sealing structure arranged in the second testing cavity in a surrounding mode, the second sealing structure enables the second clamp to form a second cavity, and a second through hole is formed in the second clamp and communicated with the second cavity and the external environment.
3. The test system of claim 1, wherein the first fixture and the second fixture each comprise an upper plate and a lower plate, the upper plate having an upper groove formed thereon, the lower plate having a lower groove formed thereon, and the driving assembly being coupled to the upper plate and driving the upper plate to press against the lower plate such that the upper groove and the lower groove form a test chamber.
4. The test system of claim 3, wherein the lower groove is a semi-annular groove, an inner seal ring is disposed on an inner side of the lower groove, and an outer seal ring is disposed on an outer side of the lower groove; and the lower template is provided with a through hole communicated with the external environment in the area enclosed by the inner sealing ring, or the position of the upper template corresponding to the area enclosed by the inner sealing ring.
5. The test system as claimed in claim 3, wherein the lower template is provided with a protrusion adapted to fit the device under test, and the lower recess comprises a receiving groove formed on the protrusion.
6. The test system of claim 5, wherein the protrusion is connected to the lower template through a fixing member, the fixing member is inserted into a fixing hole formed in the lower template, and a third through hole communicated with the fixing hole is formed in the fixing member.
7. The test system according to claim 6, wherein the fixing member is a bolt, and the third through hole penetrates the bolt in an axial direction of the bolt.
8. The test system according to claim 5, wherein the device under test is an earphone, the earphone includes a semi-annular connecting portion, two ear wearing portions respectively connected to both ends of the connecting portion, and two sound generating portions respectively connected to the two ear wearing portions;
the lower groove also comprises a connecting part groove and a sounding part groove, and the connecting part groove, the accommodating groove and the sounding part groove are arranged in a separated manner;
when the upper template is pressed on the lower template, the upper groove enables the connecting part groove, the accommodating groove and the sounding part groove to form a communicated closed cavity.
9. The testing system of claim 3, wherein an air inlet is disposed on a wall of the lower groove, and the air control assembly is connected to the air inlet.
10. The test system of claim 1, wherein the drive assembly simultaneously drives the first clamp and the second clamp to simultaneously open or close the first test chamber and the second test chamber.
CN201922419922.7U 2019-12-27 2019-12-27 Air tightness test system Active CN211347267U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201922419922.7U CN211347267U (en) 2019-12-27 2019-12-27 Air tightness test system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201922419922.7U CN211347267U (en) 2019-12-27 2019-12-27 Air tightness test system

Publications (1)

Publication Number Publication Date
CN211347267U true CN211347267U (en) 2020-08-25

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Application Number Title Priority Date Filing Date
CN201922419922.7U Active CN211347267U (en) 2019-12-27 2019-12-27 Air tightness test system

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Country Link
CN (1) CN211347267U (en)

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