Test fixture

Abstract

The application relates to a test tool and relates to the technical field of air tightness testing, which comprises a seat body, the seat body is provided with a product insertion groove and a connecting hole which are in communication with each other, the product insertion groove is suitable for product insertion; a suction head is in plug-in cooperation with the connecting hole; a water removal module comprises a first negative pressure generator, an air inlet of the first negative pressure generator is in communication with the suction head; and an air tightness test module is in communication with the suction head and is suitable for testing the air tightness of a product. The application can completely remove the residual moisture in the product, cut off the path of moisture entering the test module from the source, avoid the moisture from contacting the precise components in the air tightness test module mechanism, effectively prevent the corrosion of the components, reduce the failure risk of the air tightness test module, prolong the service life of the equipment, and effectively solve the technical problem that the air tightness test module does not have an effective moisture blocking mechanism in the prior art.

Description

Technical Field

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

[0002] In the manufacturing of Bluetooth headsets, many core internal components are often fixed and sealed using adhesive bonding. Since Bluetooth headsets need to be waterproof and dustproof to withstand everyday use, the sealing performance of the adhesive joints directly determines the product quality. If the adhesive seal is defective, external moisture and dust can easily penetrate the headset through weak points such as the microphone hole, causing not only malfunctions of components like the microphone but also potentially leading to a short circuit and rendering the entire device unusable. Therefore, after the adhesive bonding process is completed, the sealing performance of the adhesive joints must be tested by an airtightness testing agency to select products that pass the sealing test.

[0003] Most existing airtightness testing mechanisms employ the differential pressure method. The principle is as follows: a reference end and a test end are set up. The reference end is connected to a sealed reference component to simulate a leak-free standard state. The test end is connected to the product under test, and the test end is also connected to the product under test. A differential pressure sensor detects the pressure difference between the two ends to determine whether a leak exists in the product under test. Specifically, during testing, the suction head of the mechanism tightly adheres to the Bluetooth headset product, forming a closed testing path. Then, the test end and reference end of the mechanism respectively suction air from the closed path. The pressure difference between the test end and the reference end is used to determine whether there is a leak at the glue joint of the product under test.

[0004] However, in addition to airtightness testing, Bluetooth headsets usually need to undergo waterproof performance testing before leaving the factory. If the waterproof test fails, moisture will enter the product through the microphone hole, resulting in a wet product. Existing airtightness testing institutions do not have an effective moisture barrier structure. When the aforementioned wet product is tested for airtightness, the moisture inside the product will directly enter the airtightness testing institution through the suction action of the suction head and the air intake process. This will cause the core components such as the circuit components and air valve body inside the testing institution to be corroded by moisture, which will lead to the failure or even scrapping of the testing institution. Utility Model Content

[0005] This application provides a testing fixture to solve the technical problem that in the prior art, the airtightness testing mechanism does not have an effective moisture barrier structure. When testing products containing water, the internal moisture will enter the testing mechanism through the suction head and air passage, causing corrosion of the internal components of the testing mechanism, which in turn leads to the failure or even scrapping of the testing mechanism.

[0006] This application provides a testing fixture for testing the airtightness of a product, the testing fixture comprising: A base having a storage slot and a connecting hole that are interconnected, wherein the storage slot is suitable for inserting the product; The suction tip is inserted into the connection hole. A dewatering module, comprising a first negative pressure generator, wherein the air inlet of the first negative pressure generator is connected to the suction head; and An airtightness testing module is connected to the suction head and configured to test the airtightness of the product.

[0007] In an optional implementation, the seat includes: The fixing base has a first through hole and a receiving groove that are interconnected; A sealing seat is detachably disposed in the receiving groove. The sealing seat has a second through hole that communicates with the receiving groove, wherein the first through hole and the second through hole communicate with each other to form the connecting hole.

[0008] In one alternative embodiment, the fixing seat is a rigid seat and the sealing seat is a flexible seat.

[0009] In an optional embodiment, the base further includes a connecting plate, the connecting plate being provided with a third through hole, the fixing base being detachably connected to the connecting plate, and the first through hole and the third through hole being aligned with each other; The connecting plate is provided with one or more positioning blocks, which position the fixing base.

[0010] In one alternative embodiment, the suction head includes a detachably connected head body and a support portion, the head body being inserted into the connection hole.

[0011] In an optional embodiment, the test fixture further includes a linear module extending along a first direction, the suction head being connected to a slider of the linear module, and the suction head being able to be inserted into or removed from the connection hole by moving the suction head along the linear module.

[0012] In an optional embodiment, the dewatering module further includes a reversing valve, which includes a first input terminal, a first output terminal, and a second output terminal. The suction head is connected to the first input terminal, the first negative pressure generator is connected to the first output terminal, and the airtightness testing module is connected to the second output terminal.

[0013] In an optional embodiment, the dewatering module further includes a first pressure regulator connected in series between the first output terminal of the reversing valve and the first negative pressure generator.

[0014] In an optional embodiment, after the product is inserted into the storage slot, a test cavity is formed between the product and the base; the airtightness test module includes: A housing having a contoured cavity that is substantially the same as the test cavity; The leak detector has an intake end, an exhaust end, a reference input port, and a test input port. The reference input port is connected and communicates with the contoured cavity, and the test input port is connected and communicates with the second output end of the reversing valve. A second negative pressure generator is connected to and communicates with the intake end.

[0015] In an optional embodiment, the airtightness testing module further includes a second air pressure regulator connected to the input of the second negative pressure generator.

[0016] The technical solutions provided in this application have the following advantages compared with the prior art: The testing fixture provided in this application embodiment, when testing the airtightness of a product, places the product in the housing, then precisely inserts the suction head into the connection hole, and subsequently activates the first negative pressure generator. The suction head then draws suction from inside the product; if water remains inside, it will be drawn away by the first negative pressure generator. The first negative pressure generator can quickly remove residual moisture from inside the product, eliminating moisture interference for subsequent airtightness testing, cutting off the path for moisture to enter the test module, and preventing moisture from contacting the precision components inside the airtightness test module. This effectively prevents corrosion of the internal components of the airtightness test module and extends the service life of the equipment. Attached Figure Description

[0017] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0020] Figure 1This is a schematic diagram of one embodiment of a testing fixture provided in this application. Figure 2 This is a partial structural schematic diagram of the test fixture provided in an embodiment of this application; Figure 3 This is a schematic diagram of one embodiment of the water removal module provided in this application. Figure 4 A schematic diagram of the structure of the base and the airtightness test module provided in the embodiments of this application; Figure 5 for Figure 4 A partial cross-sectional view of the structure shown. Figure 6 This is a partial structural schematic diagram of the airtightness testing module provided in an embodiment of this application.

[0021] Explanation of reference numerals in the attached figures: 100. Base; 110. Fixing base; 111. First through hole; 112. Receiving groove; 113. First notch; 120. Sealing seat; 121. Second through hole; 122. Receiving groove; 123. Second notch; 130. Connecting plate; 131. Third through hole; 140. Positioning block; 200. Suction head; 210. Head body; 220. Support part; 300. Water removal module; 310. First negative pressure generator; 320. Reversing valve; 321. First Input terminal; 322, First output terminal; 323, Second output terminal; 330, First air pressure regulator; 400, Air tightness test module; 410, Housing; 420, Leak detector; 421, Intake terminal; 422, Exhaust terminal; 423, Reference input port; 424, Test input port; 430, Second negative pressure generator; 440, Second air pressure regulator; 500, Linear module; 510, Slider; 600, Worktable; 700, Bluetooth headset. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0023] The following disclosure provides numerous different embodiments or examples for implementing various structures of the invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the invention. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. Additionally, examples of various specific processes and materials are provided in this invention; however, those skilled in the art will recognize the applicability of other processes and / or the use of other materials.

[0024] For ease of description, spatial relative terms may be used in the text to describe the relative position or movement of one element or feature relative to another element or feature, as shown in the figure. These relative terms include, for example, "inside," "outside," "middle," "outer," "below," "below," "above," "front," "back," etc. Such spatial relative terms are intended to include different orientations of the device in use or operation, other than those depicted in the figure. For example, if the device in the figure undergoes a positional flip, orientation change, or change of motion, these directional indications will change accordingly. For instance, an element described as "below other elements or features" or "below other elements or features" will subsequently be oriented "above other elements or features" or "above other elements or features." Therefore, the example term "below" can include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions), and the spatial relative descriptors used in the text will be interpreted accordingly.

[0025] To address the technical problem that existing airtightness testing mechanisms lack effective moisture barrier structures, allowing internal moisture to enter the testing mechanism via the suction head and air passage during testing of wet products, causing corrosion of internal components and potentially leading to malfunctions or even scrapping of the testing mechanism, this application provides a testing fixture that prevents residual moisture from entering the airtightness testing mechanism, reducing the risk of failure of the airtightness testing module and extending the service life of the equipment.

[0026] Figure 1 A testing fixture provided in this application embodiment is used to test the airtightness of a product. The testing fixture includes: The base 100 has an interconnected storage slot and a connecting hole, wherein the storage slot is suitable for product insertion; The suction head 200 is inserted into the connection hole. The dewatering module 300 includes a first negative pressure generator 310, the air inlet of which is connected to the suction head 200; and Air tightness testing module 400 is connected to suction head 200 and configured to test the air tightness of the product.

[0027] like Figures 1 to 4 As shown, when testing the airtightness of a product, the product is first placed in the storage slot, and then the suction head 200 is precisely inserted into the connection hole. The first negative pressure generator 310 is then activated, and the suction head 200 is used to draw water from the inside of the product. If there is residual water inside the product, this water will be drawn away by the first negative pressure generator 310. Preferably, the suction time of the first negative pressure generator 310 is set to 20 seconds, and a large negative pressure design is adopted. The strong suction generated by the large negative pressure, combined with the sufficient suction time of 20 seconds, can quickly and thoroughly remove any residual water from the inside of the product, eliminating water interference for subsequent airtightness testing. After the water removal operation is completed, the first negative pressure generator 310 is turned off, and then the airtightness testing module 400 is activated to conduct the normal product airtightness test.

[0028] The first negative pressure generator 310, through its pretreatment design of high negative pressure and long-term suction, can completely remove residual moisture inside the product before the formal airtightness test, cutting off the path for moisture to enter the test module from the source. This prevents moisture from contacting the precision components inside the airtightness test module 400, effectively preventing component corrosion, reducing the risk of failure of the airtightness test module 400, extending the service life of the equipment, and effectively solving the technical problem of the lack of an effective moisture barrier mechanism in the existing airtightness test module 400.

[0029] Furthermore, in existing technologies, the airtightness testing module 400 performs a pre-vacuuming step before testing. This step uses appropriate negative pressure to expel residual air, minute impurities, or airflow disturbances from the closed passage, stabilizing the initial pressure within the passage and providing a clean pressure reference for subsequent differential pressure testing. In this application, the first negative pressure generator 310 can directly replace this step, effectively removing moisture from water-containing products and directly replacing the traditional evacuation step. This eliminates the need for separate design of air paths, negative pressure components, or control levels for pre-vacuuming, simplifying the overall structure of the testing mechanism.

[0030] In some embodiments, the seat 100 includes: The fixing base 110 has a first through hole 111 and a receiving groove 112 that are interconnected; The sealing seat 120 is detachably disposed in the receiving groove 112. The sealing seat 120 has a second through hole 121 and a receiving groove 122 that are interconnected. The first through hole 111 and the second through hole 121 are interconnected to form a connecting hole.

[0031] like Figures 1 to 5 As shown, the test fixture also includes a workbench 600, a fixed seat 110 placed on the workbench 600, the fixed seat 110 is a vertical structure, the receiving groove 112 of the fixed seat 110 faces upward, and the first through hole 111 is located at the bottom of the fixed seat 110 and passes through the fixed seat 110.

[0032] The outer wall of the sealing seat 120 fits snugly against the interior of the receiving groove 112. The opening of the receiving groove 122 of the sealing seat 120 faces upward to accommodate the Bluetooth headset 700. The second through hole 121 is located at the bottom of the sealing seat 120 and extends through it. When the sealing seat 120 is assembled in place, the second through hole 121 of the sealing seat 120 is precisely aligned with and coaxially connected to the first through hole 111 of the fixing seat 110, forming a connection hole for the suction head 200 to extend into. Since the charging port and microphone hole of the existing Bluetooth headset 700 are usually located at the bottom of the Bluetooth headset 700, after the Bluetooth headset 700 is placed in the receiving groove 122 of the sealing base 120, the charging port and microphone hole of the Bluetooth headset 700 correspond exactly to the second through hole 121 of the sealing base 120. After the suction head 200 is inserted into the connection hole, it can be directly aligned with the charging port and microphone hole at the bottom of the Bluetooth headset 700, so that the Bluetooth headset 700 can be suctioned in the future without the need to adjust the product posture or disassemble parts, which can ensure the accuracy and efficiency of the suction path.

[0033] The detachable sealing seat 120 allows for testing different models of Bluetooth headsets 700 without replacing components such as the fixed seat 110 and the workbench 600. Only the corresponding sealing seat 120 needs to be replaced. Compared to the traditional design with fixed models and tooling, the detachable fixed seat 110 and sealing seat 120 can effectively reduce the number of tooling parts, reduce equipment procurement and storage costs, and the changeover operation only takes a very short time, which can significantly improve changeover efficiency.

[0034] Furthermore, since the sealing seat 120 is placed inside the receiving groove 112, first notches 113 are symmetrically provided on opposite sides of the receiving groove 112 to facilitate the removal of the sealing seat 120. Personnel can directly remove or place the sealing seat 120 through the first notches 113. Similarly, to facilitate the removal of the Bluetooth headset 700, second notches 123 are symmetrically provided on opposite sides of the receiving groove 122. Personnel can remove or place the Bluetooth headset 700 through the second notches 123.

[0035] The first notch 113 provides a clear space for workers to apply force, allowing them to quickly pick up and put down the sealing seat 120 with one hand without the need for auxiliary tools. This avoids difficulties caused by obstruction from the groove wall and shortens the operation time for a single person. Similarly, the second notch 123 corresponds to the edge of the Bluetooth headset 700, allowing for quick pick-up and put-down with one hand. Through the cooperation of the first notch 113 and the second notch 123, a single person can operate multiple testing fixtures simultaneously, indirectly reducing labor costs.

[0036] In some embodiments, the fixing seat 110 adopts a rigid seat body 100, and the sealing seat 120 adopts a flexible seat body 100.

[0037] The rigid mounting base 110 has strong load-bearing capacity and resistance to deformation, and can stably support the sealing base 120 and the Bluetooth headset 700. Even after long-term use, it can still maintain the dimensional accuracy of the receiving groove 112, avoiding the misalignment of the connection hole due to tooling deformation. In addition, the rigid mounting base 110 fits tightly with the worktable 600, eliminating the risk of shaking and preventing the test results from being affected by tooling vibration during the test.

[0038] The flexible sealing seat 120 can be made of materials such as silicone or rubber. The flexible sealing seat 120 has good elastic deformation capability. When the Bluetooth headset 700 is placed into the receiving slot 122, the sealing seat 120 will deform slightly with the outline of the headset shell. For the small deviation of the Bluetooth headset 700 shell, there is no need to customize the sealing seat 120 separately for the slight size difference, which increases the adaptability of a single set of sealing seats 120 and indirectly reduces the cost of tooling parts.

[0039] In some embodiments, the base 100 further includes a connecting plate 130, on which a third through hole 131 is provided, and the fixing base 110 is detachably connected to the connecting plate 130, with the first through hole 111 and the third through hole 131 aligned with each other. One or more positioning blocks 140 are provided on the connecting plate 130, and one or more positioning blocks 140 position the fixing seat 110.

[0040] like Figure 4 and Figure 5As shown, the connecting plate 130 is a rectangular plate and is horizontally fixed on the worktable 600, serving as the installation reference for the fixed seat 110. The fixed seat 110 is detachably connected to the connecting plate 130, thus forming a fixed structure in which the connecting plate 130, the fixed seat 110, and the sealing seat 120 are stacked sequentially from bottom to top and coaxially aligned. The positioning block 140 is L-shaped and placed horizontally on the worktable 600. The right-angled notch of the positioning block 140 faces the connecting plate 130, and the right-angled notch of the positioning block 140 can be precisely engaged at the right angle of the connecting plate 130. Preferably, two positioning blocks 140 are symmetrically arranged along the length direction of the connecting plate 130, and the two positioning blocks 140 are respectively engaged at the two right angles along the length direction of the connecting plate 130. Through the cooperative limiting of the two L-shaped positioning blocks 140, a bidirectional constraint can be formed from the length and width directions of the connecting plate 130, which can effectively prevent the connecting plate 130 from horizontally shifting due to vibration or other factors during the test.

[0041] In some embodiments, the suction head 200 includes a detachably connected head body 210 and a support portion 220, with the head body 210 being inserted into a connection hole.

[0042] like Figure 2 As shown, the detachable head body 210 can be customized to fit different models of Bluetooth headsets 700, while the support part 220 can be reused as a universal basic component. When testing different models of Bluetooth headsets 700, it is not necessary to replace the entire suction head 200; only the corresponding head body 210 needs to be replaced. The head body 210 and the support part 220 are connected by a quick-detachable structure, such as a clip. When replacing the suction head 200, it is not necessary to disassemble the connection between the suction head 200 and the air passage; only the individual head body 210 needs to be replaced.

[0043] The head body 210 and the connection hole are connected by a plug-in joint. After the head body 210 is inserted, its top can fit tightly against the Bluetooth headset, which can effectively block the connection between the test path and the outside atmosphere and avoid negative pressure leakage during suction. In addition, since the suction head 200 will be in contact with moisture, impurities and other substances for a long time, it is prone to clogging and corrosion. The detachable suction head 200 is easier to clean or replace, which can effectively shorten maintenance time.

[0044] Preferably, the suction head 200 can be made of a flexible material, making soft contact with the Bluetooth headset 700, which can avoid scratches or paint damage to the Bluetooth headset 700 caused by hard materials.

[0045] In some embodiments, the test fixture further includes a linear module 500 extending along a first direction, and a suction head 200 connected to a slider 510 of the linear module 500. By moving the suction head 200 along the linear module 500, the suction head 200 can be inserted into a connection hole or pulled out of the connection hole.

[0046] like Figures 1 to 5 As shown, in this embodiment, the workbench 600 is box-shaped. The dewatering module 300 and the linear module 500 are both disposed inside the box of the workbench 600, while the fixing seat 110 is disposed on the upper table surface of the workbench 600. Therefore, in order to facilitate the precise docking of the suction head 200 and the connecting hole, a connecting hole penetrating the top surface of the workbench 600 is provided on the top surface of the workbench 600.

[0047] The linear module 500 is fixed in the workbench 600 housing along the vertical direction, i.e. the first direction. During operation, the linear module 500 drives the slider 510 to move the suction head 200 up or down in the vertical direction. When it rises, the suction head 200 passes through the connecting hole and the connection hole of the workbench 600 in sequence and accurately connects to the charging hole and microphone hole at the bottom of the Bluetooth headset 700. When it falls, the suction head 200 is pulled out from the connection hole and reset.

[0048] The box-type workbench 600 encloses the dewatering module 300 and the linear module 500 inside, forming a physical protective barrier to prevent external vibrations from interfering with each module, ensuring the module's operational accuracy, and indirectly guaranteeing the accuracy of suction and testing.

[0049] The connecting hole and the connection hole are coaxially aligned, providing a clear vertical guide channel for the suction head 200. This prevents the suction head 200 from being misaligned when inserted, ensuring that the suction head 200 is always accurately aligned with the charging port and microphone hole at the bottom of the Bluetooth headset 700, thereby improving the efficiency of moisture removal during suction and the sealing reliability during testing.

[0050] The linear module 500 enables automated insertion and removal of the suction head 200, completing the cycle of insertion-suction-testing-removal without manual intervention, effectively improving batch testing efficiency.

[0051] In some embodiments, the dewatering module 300 further includes a reversing valve 320, which includes a first input terminal 321, a first output terminal 322, and a second output terminal 323. The suction head 200 is connected to the first input terminal 321, the first negative pressure generator 310 is connected to the first output terminal 322, and the airtightness test module 400 is connected to the second output terminal 323.

[0052] like Figure 2 and Figure 3As shown, during dehydration, the reversing valve 320 switches to the state where the first output terminal 322 is open and the second output terminal 323 is closed. The suction head 200 is connected to the first negative pressure generator 310 through the reversing valve 320. Then, the first negative pressure generator 310 is activated, and the suction head 200 sucks out water from the Bluetooth headset 700. The water in the Bluetooth headset 700 is drawn away and removed by the airflow. After the dehydration operation is completed, the reversing valve 320 switches to the state where the first output terminal 322 is closed and the second output terminal 323 is open, cutting off the passage between the suction head 200 and the first negative pressure generator 310, so that the suction head 200 is sealed and connected to the airtightness test module 400. The airtightness test module 400 is then activated to perform an airtightness test on the dehydrated Bluetooth headset 700.

[0053] The reversing valve 320 achieves one-button switching via electromagnetic control, enabling rapid switching between the dewatering gas path and the test gas path without manual intervention. During the switching process, it ensures that one end is open while the other end is sealed, preventing the risk of gas path leakage and avoiding mutual interference between the dewatering gas path and the test gas path, thus ensuring the independence and reliability of the two gas paths.

[0054] In some embodiments, the water removal module 300 further includes a first air pressure regulator 330, which is connected in series between the first output terminal 322 of the reversing valve 320 and the first negative pressure generator 310.

[0055] like Figure 3 As shown, different negative pressure thresholds can be matched for different models of Bluetooth headsets 700, so as to accurately control the output negative pressure of the first negative pressure generator 310 within the range of efficient water removal and ensuring product safety, avoiding the limitations of a single fixed negative pressure, and avoiding product defects caused by negative pressure overload, such as deformation of the Bluetooth headset 700 shell.

[0056] Preferably, the first pressure regulator 330 also integrates a filter that can filter impurities in the air path to protect all components in the air path.

[0057] In some embodiments, after the product is inserted into the storage slot, a test cavity is formed between the product and the base 100; the airtightness test module 400 includes: The housing 410 has a contoured cavity, which is basically the same as the test cavity. Leak detector 420 has an intake end 421, an exhaust end 422, a reference input port 423, and a test input port 424. The reference input port 423 is connected to and communicates with the contour cavity, and the test input port 424 is connected to and communicates with the second output end 323 of the reversing valve 320. The second negative pressure generator 430 is connected to and communicates with the suction end 421.

[0058] like Figures 1 to 3 as well as Figure 6 As shown, the contoured cavity can simulate the internal environment of a leak-free, qualified product, contrasting with the test cavity. When the Bluetooth headset 700 is placed into the sealing seat 120, the test cavity is formed. The linear module 500 is activated, driving the slider 510 to raise the suction head 200 vertically. The suction head 200 is inserted into the connection hole, forming a closed passage with the Bluetooth headset 700. The first negative pressure generator 310 is adjusted, setting its dewatering negative pressure and suction duration. The reversing valve 320 is switched to the state where the first output terminal 322 is open and the second output terminal 323 is closed, allowing the suction head 200 to form a closed air path with the first negative pressure generator 310 through the reversing valve 320. The first negative pressure generator 310 is activated to suction and remove water from the Bluetooth headset 700. After the dewatering operation is completed, the first negative pressure generator 310 stops working. The reversing valve 320 switches to a state where the first output terminal 322 is closed and the second output terminal 323 is open, cutting off the dewatering gas path. The second negative pressure generator 430 starts, and the leak detector 420 inputs stable negative pressure to the test chamber and the contour chamber respectively. After the pressure in the two chambers stabilizes, the leak detector 420 starts testing. The leak detector 420 compares the pressure difference between the reference input port 423 and the test input port 424 through the differential pressure sensor. If the difference is within the qualified threshold, the seal is deemed qualified; if the difference exceeds the standard, a leak is deemed to exist. After the test is completed, the second negative pressure generator 430 stops working, and the leak detector 420 removes residual gas through the exhaust terminal 422. The linear module 500 drives the slider 510 to move the suction head 200 down vertically, and the suction head 200 is pulled out of the connection hole and reset to the initial position.

[0059] In some embodiments, the airtightness test module 400 further includes a second air pressure regulator 440, which is connected to the input of the second negative pressure generator 430.

[0060] like Figure 6 As shown, the second air pressure regulator 440 can stabilize the air source pressure input to the second negative pressure generator 430 within a set reference range, eliminating the interference of air source fluctuations on the working state of the second negative pressure generator 430 from the source. Furthermore, the output negative pressure range of the second negative pressure generator 430 can be adjusted via the second air pressure regulator 440 for different models of Bluetooth headsets 700.

[0061] It should be understood that the terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “described” as used herein may also include the plural forms. The terms “comprising,” “including,” “containing,” and “having” are inclusive and therefore indicate the presence of the stated features, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not construed as requiring them to be performed in a particular order described or illustrated unless the order of performance is explicitly indicated. It should also be understood that additional or alternative steps may be used.

[0062] Although terms such as first, second, third, etc., may be used in this document to describe multiple elements, components, regions, layers, and / or segments, these elements, components, regions, layers, and / or segments should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or segment from another. Unless the context clearly indicates otherwise, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence. Therefore, the first element, component, region, layer, or segment discussed below may be referred to as the second element, component, region, layer, or segment without departing from the teachings of the exemplary embodiments.

[0063] The above description is merely a specific embodiment of the present invention, enabling those skilled in the art to understand or implement the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A testing fixture for testing the airtightness of a product, characterized in that, The test fixture includes: A base having a storage slot and a connecting hole that are interconnected, wherein the storage slot is suitable for inserting the product; The suction tip is inserted into the connection hole. A dewatering module, comprising a first negative pressure generator, wherein the air inlet of the first negative pressure generator is connected to the suction head; and An airtightness testing module is connected to the suction head and configured to test the airtightness of the product.

2. The test fixture according to claim 1, characterized in that, The seat body includes: The fixing base has a first through hole and a receiving groove that are interconnected; A sealing seat is detachably disposed in the receiving groove. The sealing seat has a second through hole and a receiving groove that are interconnected, wherein the first through hole and the second through hole are interconnected to form the connecting hole.

3. The testing fixture according to claim 2, characterized in that, The fixed seat adopts a rigid seat body, and the sealing seat adopts a flexible seat body.

4. The test fixture according to claim 2, characterized in that, The base also includes a connecting plate, on which a third through hole is provided, and the fixed base is detachably connected to the connecting plate, wherein the first through hole and the third through hole are aligned with each other; The connecting plate is provided with one or more positioning blocks, which position the fixing base.

5. The testing fixture according to claim 1, characterized in that, The suction head includes a detachably connected head body and a support portion, wherein the head body is inserted into the connection hole.

6. The test fixture according to claim 1, characterized in that, The test fixture also includes a linear module that extends along a first direction. The suction head is connected to a slider of the linear module. By moving the suction head along the linear module, the suction head can be inserted into the connection hole or pulled out of the connection hole.

7. The test fixture according to claim 1, characterized in that, The dewatering module also includes a reversing valve, which includes a first input terminal, a first output terminal, and a second output terminal. The suction head is connected to the first input terminal, the first negative pressure generator is connected to the first output terminal, and the airtightness testing module is connected to the second output terminal.

8. The test fixture according to claim 7, characterized in that, The water removal module also includes a first air pressure regulator, which is connected in series between the first output end of the reversing valve and the first negative pressure generator.

9. The test fixture according to claim 7, characterized in that, After the product is inserted into the storage slot, a test cavity is formed between the product and the base; the airtightness test module includes: A housing having a contoured cavity that is substantially the same as the test cavity; The leak detector has an intake end, an exhaust end, a reference input port, and a test input port. The reference input port is connected and communicates with the contoured cavity, and the test input port is connected and communicates with the second output end of the reversing valve. A second negative pressure generator is connected to and communicates with the intake end.

10. The test fixture according to claim 9, characterized in that, The airtightness testing module also includes a second air pressure regulator, which is connected to the input terminal of the second negative pressure generator.

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