CN208012824U - A kind of equipment of test product air-tightness - Google Patents
A kind of equipment of test product air-tightness Download PDFInfo
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- CN208012824U CN208012824U CN201820486825.2U CN201820486825U CN208012824U CN 208012824 U CN208012824 U CN 208012824U CN 201820486825 U CN201820486825 U CN 201820486825U CN 208012824 U CN208012824 U CN 208012824U
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Abstract
A kind of equipment of test product air-tightness, including：Seal chamber, inflator pump, inflator pump power plant, pressure-detecting device, inflator pump power plant, inflator pump are fixed in the lateral plates of seal chamber ontology, be also equipped on the side panel air bleeding valve and with the valve connector that is connected to inside seal chamber, inflator pump power plant as inflator pump power source and automatically controlled by industrial personal computer or PLC controller；The device structure of test product air-tightness is simple, it is overhauled convenient for investigation, maintenance cost is low, can meet different product testing requirements by placing filling block in seal chamber, generalization degree is high, and flexibly changing improves test accuracy under the manipulation that aeration quantity passes through industrial personal computer and PLC controller.In addition to this pressure pump device by industrial personal computer or PLC controls can also be added, by compression pump by inside the pressurisings media filler to seal chamber such as oil of liquid or water, to meet the needs of different product air tightness test, the versatility of further lifting means.
Description
Technical field
The utility model is related to product test technical field, specially a kind of equipment of test product air-tightness.
Background technology
Air-tightness is that all necessary project to be tested, air tightness detection equipment apply to respectively many products in the fabrication process
A industry, purpose be mainly test product whether gas leakage, the underproof product screening of air-tightness is come out, avoids air-tightness bad
Product function existing defects or can not use.
In reality production, need product to be tested varied, volume is of different sizes, such as the parts of transporting equipment,
Electronic component, gas-fired equipment etc., the equipment air-tightness that different industries manufacture require different, air-tightness generally on the market
Test equipment general rate is relatively low, needs to design different air-tightness testing devices, testing cost is higher.Secondly, different product
There are different air-tightness requirements, equipment in the prior art that can not flexibly cope with the variation of different test requests；In the prior art
Test equipment structure it is more complex, design and production cost it is higher, complicated structure substantially increases air tightness detection equipment and goes out
The frequency of existing failure, troubleshooting maintenance workload are larger.Furthermore product in the prior art needs to design to be surveyed dedicated for air-tightness
The air-filled pore of examination increases the complexity of product design and production.
In view of the above technical problems, which proposes a kind of equipment of test product air-tightness, including：Seal chamber,
Inflator pump, inflator pump power plant, pressure-detecting device, be fixed in the lateral plates of seal chamber ontology inflator pump power plant,
Inflator pump, be also equipped on the side panel air bleeding valve and with the valve connector that be connected to inside seal chamber, inflator pump power plant work
For inflator pump power source and automatically controlled by industrial personal computer or PLC controller；The device structure of test product air-tightness is simple,
It is overhauled convenient for investigation, maintenance cost is low, can meet different product testing requirements, generalization by placing filling block in seal chamber
Degree is high, and flexibly changing improves test accuracy and is not necessarily to air source under the manipulation that aeration quantity passes through industrial personal computer and PLC controller.
In addition to this pressure pump device by industrial personal computer or PLC controls can also be added, by compression pump by pressurisings such as the oil of liquid or water
Inside media filler to seal chamber, to meet the needs of different product air tightness test, the versatility of further lifting means.Again
Air tightness test can be completed without designing air-filled pore in person, product.
Invention content
A kind of equipment of test product air-tightness, including：It is enclosed by seal chamber upper cover 11, the sealing of seal chamber ontology 12
Rectangular seal chamber 1, inflator pump 2, inflator pump power plant 3, pressure-detecting device 4, wherein seal chamber upper cover 11 and seal chamber
The inside plate face joint of the upper surface detachable connection of ontology 12, seal chamber 1 is mounted on sealing strip, pressure-detecting device
4 are mounted on the variation that 1 internal pressure of seal chamber is detected in seal chamber upper cover 11, pass through screw in the lateral plates of seal chamber ontology 12
Be fixed with inflator pump power plant 3, inflator pump 2, in addition, be also equipped on the side panel air bleeding valve 6 and with connect inside seal chamber 1
Logical valve connector 5, includes the valve interface 51,52 of two connections wherein on valve connector 5, and one of valve interface 51 is logical
Crossing tracheae (being not drawn into figure) and being connect with the gas outlet 21 of inflator pump 2 makes the gas in inflator pump 2 be transmitted in seal chamber 1, is another
One valve interface 52 is connect with the import of air bleeding valve 6 by tracheae (being not drawn into figure) and is equipped with solenoid valve on the tracheae
(being not drawn into figure) controls the break-make of tracheae；Inflator pump power plant 3 is arranged in the lower section of inflator pump 2, inflator pump power plant 3
Including rotating device 31, linear module 32, sliding block 33, push plate 34, linear module 32 includes protective plate 321, lead screw 322, rotation
The power output shaft of device 31 is connect with lead screw 322, and lead screw 322 is located at 321 inside of protective plate, and the both ends of lead screw 322 pass through
Rolling bearing is fixed on the front and back protective plate in protective plate 321, and sliding block 33 is connected on by screw thread borehole jack on lead screw 322, sliding block
The intrinsic push plate 34 of spiral shell on 33, when sliding block 33 is moved close to 2 side of inflator pump, push plate 34 can push the piston rod 22 of inflator pump 2
It moves back and forth and is inflated operation, wherein 34 upper end of push plate is machined with U-shaped card slot 341, and U-shaped card slot 341 is connected to just
In the buckle slot 221 of 22 end of piston rod (in order to indicate to become apparent from attached drawing, the two is not fastened togather)；
The equipment of test product air-tightness is automatically controlled by industrial personal computer or PLC controller, can be in industrial personal computer or PLC controller
In write the input quantity of pressurising medium, inflation behaviour is completed by the movement of industrial personal computer or PLC controller control inflator pump power plant 3
Make, the opening and closing of control solenoid valve, keep the size of aeration quantity adjustable and controls accurately, it is easy to operate.
Operation principle：Seal chamber upper cover 11 is opened, product to be tested is put into seal chamber 1, solenoid valve is opened and beats
The air valve 6 that begins to rehearse keeps seal chamber 1, the air pressure in inflator pump 2 identical as the external world, covers seal chamber upper cover 11, closes air bleeding valve 6；It opens
Opening inflator pump power plant 3 makes push plate 34 that the piston rod 22 of inflator pump 2 be pushed to move back and forth gas extrusion into seal chamber 1,
Inflator pump power plant 3 is stopped after the air pressure in seal chamber 1 reaches setting value, at this moment in seal chamber 1 and in inflator pump 2
Air pressure it is identical, pressurize in seal chamber 1, after a period of time, the registration by observing pressure-detecting device 4 judges that product is close
Whether envelope property is qualified；After testing result determines, air bleeding valve 6 is opened, and discharges the gas in seal chamber 1, opens seal chamber upper cover 11
Inflator pump 2 resets simultaneously.
It is above-mentioned simple for the device structure of test product air-tightness, test action, it is convenient for test operation and detection device
Maintenance work, aeration quantity accuracy is high.
Preferably, the equipment of the test product air-tightness, the rotating device 31 in inflator pump power plant 3 are servo electricity
Machine or stepper motor.
Preferably, the equipment of the test product air-tightness is fixed by connecting plate in the lateral plates of seal chamber ontology 12
There are the position sensor 7 being connect with industrial personal computer or PLC controller, including intermediate origin position inductor 71, positive extreme position
Inductor 72, cathode extreme position inductor 73, three position sensors are in same level height and positive extreme position inductor
72, cathode extreme position inductor 73 is symmetrically distributed in 71 both sides of origin position inductor, correspondingly, being fixed with induction on sliding block 33
Piece 74, and with the movement of sliding block 33, sensing chip 74 may pass through the induction groove of inductor, is controlled and is revolved by position sensor 7
The action of rotary device 31.
Since the stroke of the piston rod 22 of inflator pump 2 is limited and less than the stroke of sliding block 33 in inflator pump power plant 3, when
If rotating device 31 does not stop after the positive and negative limit travel of piston rod 22 reaches or antiport can cause rotating device to continue to turn
It is dynamic, and sliding block 33 is difficult to continue to slide in the same direction, so burning machine phenomenon can be caused, in order to avoid the hair of this phenomenon
It is raw, the stroke of piston rod 22 is monitored in time provided with position sensor 7 so that industrial personal computer or PLC controller turn but to control rotating dress
Set 31 reversion or stopping.
Preferably, the equipment of the test product air-tightness, pressure-detecting device 4 are accurate air gauge or air tightness test
Instrument.
Preferably, the equipment of the test product air-tightness, inflator pump 2 are cylinder or inflator, when using inflator as
Needed when inflator pump 2 the contact face setting gasket set for the piston rod of the inflator and piston plug room that will be sold on the market with
Ensure the air-tightness of inflator.
Preferably, the equipment of the test product air-tightness further includes one and the tank connected compression pump of liquid, compression pump
Outlet end connect with a valve interface 51 of valve connector 5 by tracheae, another valve interface 51 pass through tracheae with row
The import of air valve 6 connects and is provided with solenoid valve on this section of tracheae, and the outlet of air bleeding valve 6 is connect with liquid tank by tracheae, made
It is recycled in the liquid reflux to liquid tank flowed out in seal chamber 1.It is of course also possible in the lateral plates of seal chamber ontology 1
In addition one valve connector 5, air bleeding valve 6 are set, used dedicated for the disengaging of liquid pressurising medium.
Preferably, the equipment of the test product air-tightness, when the pressurising medium in seal chamber 1 is liquid, pressure detecting
4 hydrostatic sensors of device.
Preferably, the equipment of the test product air-tightness, the liquid in liquid tank are water or oil.Different products is most suitable
Suitable air-tightness pressurising medium is different, can select suitable pressurising medium according to specific product type.
Preferably, the equipment of the test product air-tightness, the equipment of test product air-tightness further include being placed in seal chamber
The material of interior filling block, filling block can be one or more in nylon, POM, PU, steel.
Volume is certain for the same seal chamber 1, but needs the product for testing air-tightness varied, body
Product difference in size is larger, if the volume of small product size opposing seal chamber 1 to be measured is too small, even if products air tightness is unqualified close
Gas in envelope chamber 1 can penetrate into interiors of products, but since infiltration capacity is less, so pressure-detecting device 4 can't detect, cause
Products air tightness detects accuracy and reduces, and after filling block is added, filling block can occupy the partial volume in seal chamber 1, so
The ratio of remaining space volume in product and seal chamber 1 is substantially increased, while improving the accuracy of products air tightness detection.
Wherein, since the filling block of nylon, POM, PU, steel material will not absorb water, oil and air, so will not be generated to testing result
It influences.
Preferably, the equipment of the test product air-tightness, nylon, POM, PU material filling block be hatching solid block,
The filling block of steel material is hollow filling block.Since nylon, POM, PU material are softer so to guarantee the resistance to compression energy of filling block
Hatching solid block may be selected in power；Steel material intensity is larger, as long as the moderate hollow filling block of wall thickness is enough to bear certain high pressure,
Hollow filling block can save material, and weight is smaller simultaneously, is convenient for the loading or unloading operation of filling block.
Preferably, the equipment of the test product air-tightness, the volume of product to be measured, which accounts for, can be filled cavity space in seal chamber 1
65% or more of volume.It can be further increased when only guaranteed small product size to be measured occupies certain proportion with filling cavity volume
The accuracy of products air tightness detection, and the volume of product to be measured and seal chamber 1 is closer, the accuracy of air-leakage test is got over
Height can adjust the size that space can be filled in seal chamber 1 according to the test request of different product.
Description of the drawings：
Specific implementation mode is further described below in conjunction with the accompanying drawings, wherein：
Fig. 1 be the utility model is related to test product air-tightness device structure schematic diagram；
Fig. 2 be the utility model is related to test product air-tightness equipment in inflator pump power plant structural representation
Figure；
Fig. 3 be the utility model is related to specific implementation case 2 in test product air-tightness equipment connection diagram；
It is as follows to number corresponding concrete structure：
Seal chamber 1, seal chamber upper cover 11, seal chamber ontology 12, inflator pump 2, gas outlet 21, piston rod 22, buckle slot
221, inflator pump power plant 3, rotating device 31, linear module 32, protective plate 321, lead screw 322, sliding block 33, push plate 34, U-shaped
Card slot 341, pressure-detecting device 4, valve connector 5, valve interface 51,52, air bleeding valve 6, position sensor 7, origin position sense
Answer device 71, positive extreme position inductor 72, cathode extreme position inductor 73, sensing chip 74
Following specific implementation mode will further illustrate the utility model in conjunction with above-mentioned attached drawing.
Specific implementation mode
Case 1 is embodied：
A kind of equipment of test product air-tightness, including：It is enclosed by seal chamber upper cover 11, the sealing of seal chamber ontology 12
Rectangular seal chamber 1, inflator pump 2, inflator pump power plant 3, pressure-detecting device 4, wherein seal chamber upper cover 11 and seal chamber
The inside plate face joint of the upper surface detachable connection of ontology 12, seal chamber 1 is mounted on sealing strip, pressure-detecting device
4 are mounted on the variation that 1 internal pressure of seal chamber is detected in seal chamber upper cover 11, pass through screw in the lateral plates of seal chamber ontology 12
Be fixed with inflator pump power plant 3, inflator pump 2, in addition, be also equipped on the side panel air bleeding valve 6 and with connect inside seal chamber 1
Logical valve connector 5, includes the valve interface 51,52 of two connections wherein on valve connector 5, and one of valve interface 51 is logical
Crossing tracheae (being not drawn into figure) and being connect with the gas outlet 21 of inflator pump 2 makes the gas in inflator pump 2 be transmitted in seal chamber 1, is another
One valve interface 52 is connect with the import of air bleeding valve 6 by tracheae (being not drawn into figure) and is equipped with solenoid valve on the tracheae
(being not drawn into figure) controls the break-make of tracheae；Inflator pump power plant 3 is arranged in the lower section of inflator pump 2, inflator pump power plant 3
Including rotating device 31, linear module 32, sliding block 33, push plate 34, linear module 32 includes protective plate 321, lead screw 322, rotation
The power output shaft of device 31 is connect with lead screw 322, and lead screw 322 is located at 321 inside of protective plate, and the both ends of lead screw 322 pass through
Rolling bearing is fixed on the front and back protective plate in protective plate 321, and sliding block 33 is connected on by screw thread borehole jack on lead screw 322, sliding block
The intrinsic push plate 34 of spiral shell on 33, when sliding block 33 is moved close to 2 side of inflator pump, push plate 34 can push the piston rod 22 of inflator pump 2
It moves back and forth and is inflated operation, wherein 34 upper end of push plate is machined with U-shaped card slot 341, and U-shaped card slot 341 is connected to just
In the buckle slot 221 of 22 end of piston rod (in order to indicate to become apparent from attached drawing, the two is not fastened togather)；
The equipment of test product air-tightness is automatically controlled by industrial personal computer or PLC controller, can be in industrial personal computer or PLC controller
In write the input quantity of pressurising medium, inflation behaviour is completed by the movement of industrial personal computer or PLC controller control inflator pump power plant 3
Make, the opening and closing of control solenoid valve, keep the size of aeration quantity adjustable and controls accurately, it is easy to operate.
Further, it is fixed with and industrial personal computer or PLC controller company by connecting plate in the lateral plates of seal chamber ontology 12
The position sensor 7 connect, including the induction of intermediate origin position inductor 71, positive extreme position inductor 72, cathode extreme position
Device 73, three position sensors same level height and positive extreme position inductor 72, cathode extreme position inductor 73 it is right
Title is distributed in 71 both sides of origin position inductor, correspondingly, sensing chip 74 is fixed on sliding block 33, and with the shifting of sliding block 33
Dynamic, sensing chip 74 may pass through the induction groove of inductor, and the action of rotating device 31 is controlled by position sensor 7.
Further, the equipment of test product air-tightness further includes the filling block being placed in seal chamber, the material of filling block
Can be nylon, POM, PU, one or more in steel, it is preferred that nylon, POM, PU material filling block be hatching solid block,
The filling block of steel material is hollow filling block, so that the volume of product to be measured is accounted in seal chamber 1 by the filling of filling block and can be filled
The 70% of cavity space volume.
Optionally, the rotating device 31 in inflator pump power plant 3 is servo motor or stepper motor, pressure-detecting device
4 be accurate air gauge or air-tightness tester, and inflator pump 2 is cylinder or inflator.
The device structure of test product air-tightness involved in this specific embodiment is simple, convenient for investigation maintenance, safeguard at
This is relatively low；Secondly, which can meet the detection of different product volume difference air-leakage test accuracy by setting filling block
It is required that generalization degree is higher and without the compressed air source unit of special setting air-leakage test；Aeration quantity passes through industrial personal computer and PLC
Flexibly changing aeration quantity, the leakproofness result of test are more acurrate under the manipulation of controller.Furthermore product is without designing air-filled pore
Air tightness test can be completed.Case 2 is embodied：
A kind of equipment of test product air-tightness, including：It is enclosed by seal chamber upper cover 11, the sealing of seal chamber ontology 12
Rectangular seal chamber 1, pressure-detecting device 4, and the tank connected compression pump of liquid, wherein seal chamber upper cover 11 and seal chamber ontology
The inside plate face joint of 12 upper surface detachable connection, seal chamber 1 is mounted on sealing strip, and pressure-detecting device 4 is pacified
The variation of 1 internal pressure of seal chamber is detected in seal chamber upper cover 11；Exhaust is installed on the side panel of seal chamber ontology 12
Valve 6 and the valve connector 5 being connected to 1 inside of seal chamber, include the valve interface 51,52 of two connections wherein on valve connector 5,
One of valve interface 51 passes through tracheae and air bleeding valve by the outlet connection of tracheae and compression pump, another valve interface 52
6 import connects and is equipped with solenoid valve on the tracheae to control the break-make of tracheae, and the outlet of air bleeding valve 6 passes through tracheae and liquid
Tank connects, and makes to recycle in the liquid reflux to liquid tank flowed out in seal chamber 1.
Wherein pressure-detecting device 4 is hydrostatic sensor
The equipment of test product air-tightness is automatically controlled by industrial personal computer or PLC controller, can be in industrial personal computer or PLC controller
In write the input quantity of pressurising medium, charge operation, control electromagnetism are completed by industrial personal computer or PLC controller control pressure pump work
The opening and closing of valve keeps the output of pressurising medium adjustable and controls accurately, easy to operate.
Further, the equipment of test product air-tightness further includes the filling block being placed in seal chamber, the material of filling block
Can be nylon, POM, PU, one or more in steel, it is preferred that nylon, POM, PU material filling block be hatching solid block,
The filling block of steel material is hollow filling block, so that the volume of product to be measured is accounted in seal chamber 1 by the filling of filling block and can be filled
The 90% of cavity space volume.
Optionally, the liquid in liquid tank is water or oil.
The device structure of test product air-tightness involved in this specific embodiment is simple, convenient for investigation maintenance, safeguard at
This is relatively low；Secondly, which can meet the detection of different product volume difference air-leakage test accuracy by setting filling block
It is required that generalization degree is higher；Can flexibly it change under the manipulation that the input quantity of liquid pressurising medium passes through industrial personal computer and PLC controller
Become, improve the accuracy of test data.
Above-described embodiments merely represent several embodiments of the utility model, the description thereof is more specific and detailed,
But it should not be understood as limiting the scope of the patent of the utility model.It should be pointed out that for the common of this field
For technical staff, without departing from the concept of the premise utility, various modifications and improvements can be made, these all belong to
In the scope of protection of the utility model.Therefore, the protection domain of the utility model patent should be determined by the appended claims.
Claims (10)
1. a kind of equipment of test product air-tightness, including：Rectangle made of being enclosed by seal chamber upper cover, the sealing of seal chamber ontology
Seal chamber, inflator pump, inflator pump power plant, pressure-detecting device, the wherein upper surface of seal chamber upper cover and seal chamber ontology
The inside plate face joint of detachable connection, seal chamber is mounted on sealing strip, and pressure-detecting device is mounted on seal chamber
The variation of detection seal chamber internal pressure is covered, inflator pump power dress has been screwed in the lateral plates of seal chamber ontology
It sets, inflator pump, the valve connector that air bleeding valve is also equipped on the side panel and is connected to seal chamber inside, includes on valve connector
The valve interface of two connections, one of valve interface make the gas in inflator pump by the connection of the gas outlet of tracheae and inflator pump
Body is transmitted in seal chamber, another valve interface on the import connection of tracheae and air bleeding valve and the tracheae by being equipped with electromagnetism
Valve controls the break-make of tracheae；
Inflator pump power plant is arranged in the lower section of inflator pump, and inflator pump power plant includes rotating device, linear module, cunning
Block, push plate, linear module include protective plate, lead screw, and the power output shaft of rotating device is connect with lead screw, and lead screw is located at protective plate
The both ends of inside, lead screw are fixed on by rolling bearing on the front and back protective plate in protective plate, and sliding block is socketed by threaded hole
On lead screw, the intrinsic push plate of spiral shell on sliding block, push plate upper end is machined with U-shaped card slot, and U-shaped card slot is connected to piston rod end just
In buckle slot；
The equipment of test product air-tightness is automatically controlled by industrial personal computer or PLC controller, can be compiled in industrial personal computer or PLC controller
Charge operation, control are completed in the input quantity for writing pressurising medium, the movement that inflator pump power plant is controlled by industrial personal computer or PLC controller
The opening and closing of solenoid valve processed.
2. the equipment of test product air-tightness as described in claim 1, it is characterised in that：Pass through in the lateral plates of seal chamber ontology
Connecting plate is fixed with the position sensor being connect with industrial personal computer or PLC controller, including intermediate origin position inductor, anode
Extreme position inductor, cathode extreme position inductor, three position sensors are in same level height and the induction of positive extreme position
Device, cathode extreme position inductor are symmetrically distributed in origin position inductor both sides, correspondingly, sensing chip is fixed on sliding block, and
With the movement of sliding block, sensing chip may pass through the induction groove of inductor, and industrial personal computer or PLC controller pass through position sensor control
The action of rotating device processed.
3. the equipment of test product air-tightness as described in claim 1, it is characterised in that：Pressure-detecting device is accurate air gauge
Or air-tightness tester.
4. the equipment of test product air-tightness as described in claim 1, feature are as follows：Rotating dress in inflator pump power plant
Set is servo motor or stepper motor.
5. the equipment of test product air-tightness as described in claim 1, feature are as follows：Inflator pump is cylinder or inflator, and
Gasket set is arranged to ensure the air-tightness of inflator with the contact face of piston plug room in the piston rod of inflator.
6. the equipment of test product air-tightness as described in claim 1, feature are as follows：It further include one tank connected with liquid
The outlet end of compression pump, compression pump is connected by a valve interface of tracheae and valve connector, another valve interface passes through
The import of tracheae and air bleeding valve connects and is provided on this section of tracheae solenoid valve, and the outlet of air bleeding valve is connected by tracheae and liquid tank
It connects.
7. the equipment of test product air-tightness as claimed in claim 2, feature are as follows：Pressure-detecting device position hydraulic sensing
Device, the liquid in liquid tank are water or oil.
8. the equipment of test product air-tightness, feature are as follows as described in any in claim 1~7：Test product air-tightness
Equipment further include the filling block being placed in seal chamber, the material of filling block can be nylon, POM, PU, one kind in steel or more
Kind.
9. the equipment of test product air-tightness as claimed in claim 8, feature are as follows：The filling block of nylon, POM, PU material
Filling block for hatching solid block, steel material is hollow filling block.
10. the equipment of test product air-tightness as claimed in claim 9, feature are as follows：The volume of product to be measured accounts for seal chamber
In can fill out 65% or more of chamber pressurising dielectric space volume.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820486825.2U CN208012824U (en) | 2018-04-08 | 2018-04-08 | A kind of equipment of test product air-tightness |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820486825.2U CN208012824U (en) | 2018-04-08 | 2018-04-08 | A kind of equipment of test product air-tightness |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108489685A (en) * | 2018-04-08 | 2018-09-04 | 华普电子（常熟）有限公司 | A kind of equipment of test product air-tightness |
| CN113654740A (en) * | 2021-08-09 | 2021-11-16 | 苏州佳祺仕信息科技有限公司 | Detection system, equipment and method of earphone shell |
-
2018
- 2018-04-08 CN CN201820486825.2U patent/CN208012824U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108489685A (en) * | 2018-04-08 | 2018-09-04 | 华普电子（常熟）有限公司 | A kind of equipment of test product air-tightness |
| CN113654740A (en) * | 2021-08-09 | 2021-11-16 | 苏州佳祺仕信息科技有限公司 | Detection system, equipment and method of earphone shell |
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