Air tightness test fixture

Abstract

The utility model provides an air tightness test fixture, which comprises a lower die provided with a space for accommodating equipment to be tested; upper die pressing heads are fixedly mounted at four corners in the upper die through pressing head fixing bolts; the lower die is provided with a positioning column; the positioning column is positioned and connected to the upper die pressing head and is fixedly connected with to-be-tested equipment; the lower mold and the upper mold are connected through an upper mold fixing bolt and are sealed through a mold closing sealing ring; an exhaust port communicated with the interior of the upper mold is formed in the side surface of the upper mold; an air inlet communicated with the interior of the lower mold is formed in the side surface of the lower mold; an interface on the side surface of the to-be-tested equipment is hermetically connected with a sliding block adapter in the lower die through a connector port sealing ring; the lower die is further provided with an air cylinder, and the air cylinder is slidably connected with the sliding block adapter through a sliding assembly. The testing problem caused by the fact that no linkage mechanism exists in the air cavity is solved, accurate and stable airtightness testing of products is achieved, and testing reliability and product quality are improved.

Description

Technical Field

[0001] This application relates to the field of test fixture technology, and in particular to an airtightness test fixture. Background Technology

[0002] A leak test fixture is a specialized fixture for testing the sealing reliability of products. Its main function is to verify and test the sealing reliability of products, aiming to detect and identify potential leaks in advance. PCBA circuits are particularly sensitive to external moisture, which can affect product stability; therefore, this fixture effectively protects the product and ensures it meets its designed lifespan.

[0003] Existing airtightness testing fixtures, lacking a linkage mechanism within the air chamber, cannot meet the airtightness testing requirements of some products, or the testing is unstable, affecting product quality and causing functional malfunctions, thus impacting usability. Therefore, this invention proposes an airtightness testing fixture to at least partially solve the problems that may exist in the prior art. Utility Model Content

[0004] In view of the aforementioned problems, this application is made in order to provide an airtightness testing fixture that overcomes or at least partially solves the aforementioned problems.

[0005] One embodiment of this application discloses an airtightness testing fixture, comprising:

[0006] The lower mold has a space to accommodate the equipment to be tested.

[0007] A mold closing sealing ring is provided between the upper mold and the lower mold;

[0008] The upper mold pressure head is fixedly installed at the four corner positions inside the upper mold by pressure head fixing bolts;

[0009] The lower mold is provided with positioning posts at its four corners; the positioning posts are positioned and connected to the upper mold pressure head, and are fixedly connected to the device to be tested;

[0010] The lower mold and the upper mold are connected by upper mold fixing bolts and sealed by the mold closing sealing ring;

[0011] The upper mold has an exhaust port on its side that communicates with the interior of the upper mold, and the lower mold has an air inlet on its side that communicates with the interior of the lower mold.

[0012] The interface on the side of the device under test is sealed to the slider adapter in the lower mold through a connector port sealing ring;

[0013] The lower mold is also equipped with a cylinder, which is slidably connected to the slider adapter via a sliding component.

[0014] Optionally, the device under test is equipped with an air nozzle;

[0015] The air nozzle is sealed to the exhaust port via an exhaust hole sealing ring.

[0016] Optionally, the lower end of the lower mold is provided with a lower mold adapter plate.

[0017] Optionally, the sliding component includes: a slide rail and a slider;

[0018] The slide rail is fixedly connected to the slider adapter;

[0019] The cylinder is connected to the slider, and the slider is slidably connected to the slide rail.

[0020] Optionally, the upper mold and the lower mold are made of aluminum alloy.

[0021] Optionally, the cylinder has a mounting block at its front end;

[0022] The cylinder is connected to the lower mold via the mounting block.

[0023] Optionally, the end of the telescopic rod connected to the cylinder is provided with a connecting groove;

[0024] The slider is provided with a snap-fit ​​part, and the connecting groove is engaged with the snap-fit ​​part.

[0025] Optionally, the device under test is provided with multiple interfaces;

[0026] The number of connector port sealing rings, slider adapters, slide rails, sliders, and cylinders corresponds to the number of interfaces.

[0027] This application has the following advantages:

[0028] In the embodiments of this application, a space for accommodating the device to be tested is provided through a lower mold; a mold closing sealing ring is provided between the upper mold and the lower mold; an upper mold pressure head is fixedly installed at the four corners of the upper mold by pressure head fixing bolts; a positioning post is provided at the four corners of the lower mold; the positioning post is positioned and connected to the upper mold pressure head and fixedly connected to the device to be tested; the lower mold and the upper mold are connected by upper mold fixing bolts and sealed by the mold closing sealing ring; an exhaust port communicating with the interior of the upper mold is provided on the side of the upper mold, and an air inlet communicating with the interior of the lower mold is provided on the side of the lower mold; the interface on the side of the device to be tested is sealed and connected to the slider adapter in the lower mold by a connector port sealing ring; the lower mold is also provided with a cylinder, and the cylinder is slidably connected to the slider adapter by a sliding component. By using a lower mold with a accommodating space, a sealing ring between the upper and lower molds, and structures such as an upper mold pressure head and positioning pins, the device under test is stably positioned and sealed, ensuring a closed testing environment. Exhaust and inlet ports ensure gas flow, and the sliding connection between the slider adapter and the cylinder forms a linkage mechanism. This solves the testing problem caused by the lack of a linkage mechanism within the air chamber, enabling accurate and stable airtightness testing of the product, improving testing reliability and product quality. Attached Figure Description

[0029] To more clearly illustrate the technical solution of this application, the drawings used in the description of this application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is an exploded structural diagram of an airtightness testing fixture provided in one embodiment of this application;

[0031] Figure 2 This is a schematic diagram of the structure of an airtightness testing fixture provided in one embodiment of this application.

[0032] In the attached diagram: 1. Upper mold fixing bolt; 2. Upper mold; 3. Upper mold pressure head; 4. Pressure head fixing bolt; 5. Exhaust hole sealing ring; 6. Connector port sealing ring; 7. Slider adapter; 8. Slide rail; 9. Slider; 10. Cylinder; 11. Equipment to be tested; 12. Positioning pin; 13. Mold closing sealing ring; 14. Lower mold; 15. Lower mold adapter plate; 201. Exhaust port; 1101. Air nozzle; 1401. Air inlet. Detailed Implementation

[0033] To make the objectives, features, and advantages of this application more apparent and understandable, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0034] Reference Figures 1 to 2 This application provides an airtightness testing fixture, comprising: a lower mold 14, having a space for accommodating a device 11 to be tested; a mold-closing sealing ring 13 between an upper mold 2 and the lower mold 14; upper mold pressure heads 3 are fixedly installed at the four corners of the upper mold 2 by pressure head fixing bolts 4; positioning posts 12 are provided at the four corners of the lower mold 14; the positioning posts 12 are positioned and connected to the upper mold pressure heads 3, and are fixedly connected to the device 11 to be tested; the lower mold 14 and the upper mold 2 are connected by upper mold fixing bolts 1 and sealed by the mold-closing sealing ring 13; the side of the upper mold 2 is provided with an exhaust port 201 communicating with the interior of the upper mold 2, and the side of the lower mold 14 is provided with a near air inlet 1401 communicating with the lower mold 14; the interface on the side of the device 11 to be tested is sealed and connected to a slider adapter 7 in the lower mold 14 by a connector port sealing ring 6; the lower mold 14 is also provided with a cylinder 10, which is slidably connected to the slider adapter 7 by a sliding assembly.

[0035] By providing a accommodating space in the lower mold 14, setting a mold-closing sealing ring 13 between the upper mold 2 and the lower mold 14, and constructing structures such as the upper mold pressure head 3 and positioning pins 12, the device under test 11 is stably positioned and sealed, ensuring a closed testing environment. The exhaust port 201 and the air inlet 1401 ensure gas flow. The cylinder 10 forms a linkage mechanism with the slider adapter 7 through a sliding component. During testing, the cylinder 10 is controlled to cause the slider adapter 7 to press the connector port sealing ring 6 located at the interface position of the device under test 11, so that the interface position of the device under test 11 is in a sealed state. This solves the testing problem caused by the lack of a linkage mechanism in the air cavity, realizes accurate and stable airtightness testing of the product, and improves testing reliability and product quality. For example, when conducting an airtightness test on a smartwatch, the watch is placed in the lower mold space, the upper mold 2 is sealed by the mold closing sealing ring 13, the positioning post 12 and the upper mold pressure head 3 fix the watch, the cylinder 10 pushes the slider adapter 7 to seal the connection with the watch interface, and the gas is tested through the air inlet 1401 and the exhaust port 201 to ensure the accuracy of the test results.

[0036] In some embodiments of this application, the device to be tested 11 is provided with a nozzle 1101; the nozzle 1101 is sealed to the exhaust port 201 through an exhaust hole sealing ring 5.

[0037] The air nozzle 1101 of the device under test 11 is sealed to the exhaust port 201 through the exhaust port sealing ring 5, which further enhances the sealing between the device and the fixture. This prevents gas leakage, ensures stable air pressure during the test, improves test accuracy, and avoids test errors caused by poor sealing.

[0038] Furthermore, a lower mold adapter plate 15 is provided at the lower end of the lower mold 14. The lower mold adapter plate 15 enhances the structural stability and load-bearing capacity of the lower mold 14. This makes the fixture more stable during testing, reducing the impact of mold shaking and other factors on the test results and extending the service life of the fixture. In addition, the lower mold adapter plate 15 can be connected to the device under test 11 via screws, and a sealing ring is provided in the screw hole, further ensuring that the device under test 11 is more securely fixed in the fixture. For example, in some cases, when performing airtightness tests on large industrial valves, the lower mold adapter plate provides good support for the lower mold, ensuring mold stability and smooth testing during the process.

[0039] In some embodiments of this application, the sliding assembly includes: a slide rail 8 and a slider 9; the slide rail 8 is fixedly connected to the slider adapter 7; the cylinder 10 is connected to the slider 9, and the slider 9 is slidably connected to the slide rail 8. The slide rail 8 is fixedly connected to the slider adapter 7, and the cylinder 10 connects to the slider 9 to achieve sliding, clarifying the specific structure and working method of the sliding assembly. During testing, the cylinder 10 is controlled to push the slider 9 along the slide rail 8 towards the slider adapter 7, causing the slider adapter 7 to press and seal the connector port sealing ring 6 at the interface of the device under test 11. Through the slide rail 8, the slider 9 can move along the track defined by the slide rail 8, providing a certain guiding and positioning effect, ensuring that the connector port sealing ring 6 is evenly stressed, ensuring sealing performance. Moreover, the combination of the slider 9 and the slide rail 8 makes the sliding smoother and more stable, ensuring the accuracy and reliability of the interface connection with the device under test, and improving the working efficiency of the linkage mechanism. For example, when testing the waterproof performance of a mobile phone, the cylinder 10 pushes the slider 9 to slide along the slide rail 8, which in turn causes the slider adapter 7 to squeeze the connector port sealing ring 6, so that the mobile phone charging port, headphone jack and other interfaces can be quickly and accurately sealed and connected, and the test preparation work can be completed quickly and efficiently.

[0040] In some embodiments of this application, the upper mold 2 and the lower mold 14 are made of aluminum alloy. The use of aluminum alloy in the upper mold 2 and lower mold 14 leverages the lightweight, high strength, and corrosion resistance of aluminum alloy. This reduces the overall weight of the fixture, facilitating operation and handling; simultaneously, it improves the durability of the mold, reduces maintenance costs, and the aluminum alloy material is rust-resistant, ensuring long-term stable sealing performance of the fixture. For example, in airtightness testing fixtures frequently used in laboratories, aluminum alloy molds make the fixture lighter, easier for operators, and less prone to damage over long-term use, saving costs.

[0041] Furthermore, a mounting block is provided at the front end of the cylinder 10; the cylinder 10 is connected to the lower mold 14 through the mounting block. The aforementioned mounting block at the front end of the cylinder 10, connecting it to the lower mold 14, optimizes the installation method of the cylinder 10. This makes the cylinder 10 more securely installed, ensuring stable operation during work and preventing the cylinder 10 from shaking due to insecure installation, which could affect the normal operation of the linkage mechanism. For example, in the airtightness testing stage of an automated production line, the mounting block ensures that the cylinder 10 is stably installed on the lower mold 14, making the action of the cylinder 10 pushing the slider adapter stable and reliable, ensuring a smooth testing process.

[0042] In some embodiments of this application, the telescopic rod end of the cylinder 10 is provided with a connecting groove; the slider 9 is provided with a snap-fit ​​part, and the connecting groove engages with the snap-fit ​​part. The engagement of the connecting groove at the end of the telescopic rod of the cylinder 10 with the snap-fit ​​part of the slider 9 ensures the tightness and stability of the connection between the cylinder 10 and the slider 9. This allows the power of the cylinder 10 to be effectively transmitted to the slider 9, ensuring that the slider adapter 7 moves accurately as expected, improving the coordination and reliability of the linkage mechanism. Furthermore, the engagement of the connecting groove and the snap-fit ​​part facilitates assembly and disassembly. For example, when testing the airtightness of electronic equipment, the cylinder 10, through the snap-fit ​​connection, drives the slider adapter 7 to quickly dock and separate from the equipment interface, with precise action and improved testing efficiency.

[0043] Furthermore, the device under test 11 is provided with multiple interfaces; the number of connector port sealing rings 6, slider adapters 7, slide rails 8, sliders 9, and cylinders 10 corresponds to the number of interfaces. The device under test has multiple interfaces, each corresponding to multiple connector port sealing rings 6, slider adapters 7, and other components. Figure 1 and Figure 2As shown, the device under test 11 can be configured with three components, such as a split-screen device with three video interfaces. The aforementioned slider adapter 7, slide rail 8, slider 9, and cylinder 10 are correspondingly configured with three components, and their specifications correspond to the video interfaces. This allows for simultaneous sealing and testing of multiple interfaces on the device, improving testing efficiency and meeting the testing needs of products with different complex structures. For example, when testing the airtightness of a computer's multi-function connector, multiple components work simultaneously for multiple interfaces such as the computer's USB, HDMI, and network interfaces, completing the testing of all interfaces at once, significantly shortening the testing time.

[0044] As an example, such as Figure 1 and Figure 2 As shown, an airtightness testing fixture is designed to prevent air leakage and contact with external moisture caused by product material problems or improper assembly. The fixture is made of aluminum alloy and has a lower mold adapter plate 15 at the bottom for connection and fixation to equipment. Below the fixture is an air inlet 1401 on the side of the lower mold for connection to the equipment, and four positioning posts 12 for placing and positioning the equipment 11 under test. At the top of the fixture is a mold sealing ring 13 to ensure the test seal after mold closing. The airtightness testing fixture has a connector port sealing ring 6, a slider adapter 7, a slide rail 8, a slider 9, and a cylinder 10 on top. During testing, the connector is automatically pressed to achieve a sealing effect. The airtightness testing fixture has an exhaust hole sealing ring 5 on top to guide the air in the device under test 11 to be discharged from the exhaust port 201 of the upper module 2. The airtightness testing fixture has an upper mold 2 and a lower mold 14 on top, which cooperate with the above-mentioned mold closing sealing ring 13 to perform a sealing test on the device under test 11. The airtightness testing fixture has a fixing screw 1 on top to connect and fix it to the device.

[0045] The aforementioned airtightness testing fixture automatically seals the connector port through the action of the connector port sealing ring 6, slider adapter 7, slide rail 8, slider 9, and cylinder 10, thus solving the problem of additional gas leakage at the product connector port. The connector port sealing ring 6, slider adapter 7, slide rail 8, slider 9, and cylinder 10 effectively prevent additional air leakage within the device under test 11, ensuring the feasibility and stability of the airtightness test. This solves the problem of many traditional testing devices 11 lacking a linkage mechanism within the air chamber, which cannot meet the airtightness test requirements of some devices under test 11 or causes unstable testing, affecting the quality of the device under test 11 and leading to functional malfunctions and impacting its use. By automatically sealing additional leakage points, the device under test 11 that cannot meet the test conditions is automatically released or clamped shut by the sealing gasket of the linkage mechanism, effectively solving the aforementioned problems.

[0046] Although preferred embodiments of the present application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the embodiments of the present application.

[0047] Finally, it should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or terminal device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or terminal device. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or terminal device that includes said element.

[0048] The above provides a detailed description of an airtightness testing fixture provided in this application. Specific examples have been used to illustrate the principles and implementation methods of this application. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. An airtightness testing fixture, characterized in that, include: The lower mold has a space to accommodate the equipment to be tested. A mold closing sealing ring is provided between the upper mold and the lower mold; The upper mold pressure head is fixedly installed at the four corner positions inside the upper mold by pressure head fixing bolts; The lower mold is provided with positioning posts at its four corners; the positioning posts are positioned and connected to the upper mold pressure head, and are fixedly connected to the device to be tested; The lower mold and the upper mold are connected by upper mold fixing bolts and sealed by the mold closing sealing ring; The upper mold has an exhaust port on its side that communicates with the interior of the upper mold, and the lower mold has an air inlet on its side that communicates with the interior of the lower mold. The interface on the side of the device under test is sealed to the slider adapter in the lower mold through a connector port sealing ring; The lower mold is also equipped with a cylinder, which is slidably connected to the slider adapter via a sliding component.

2. The airtightness testing fixture according to claim 1, characterized in that, The device under test is equipped with an air nozzle; The air nozzle is sealed to the exhaust port via an exhaust hole sealing ring.

3. The airtightness testing fixture according to claim 1, characterized in that, The lower end of the lower mold is provided with a lower mold adapter plate.

4. The airtightness testing fixture according to claim 1, characterized in that, The sliding component includes: a slide rail and a slider; The slide rail is fixedly connected to the slider adapter; The cylinder is connected to the slider, and the slider is slidably connected to the slide rail.

5. The airtightness testing fixture according to claim 1, characterized in that, The upper mold and the lower mold are made of aluminum alloy.

6. The airtightness testing fixture according to claim 4, characterized in that, The cylinder has a mounting block at its front end; The cylinder is connected to the lower mold via the mounting block.

7. The airtightness testing fixture according to claim 6, characterized in that, The end of the telescopic rod connected to the cylinder is provided with a connecting groove; The slider is provided with a snap-fit ​​part, and the connecting groove is engaged with the snap-fit ​​part.

8. The airtightness testing fixture according to claim 7, characterized in that, The device under test has multiple interfaces; The number of connector port sealing rings, slider adapters, slide rails, sliders, and cylinders corresponds to the number of interfaces.

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