Air tightness detection positioning tool and air tightness detection device
By using a flexible positioning component and an adjustable pressure surface for airtightness testing, the problems of complexity and wear in existing equipment have been solved, achieving efficient and accurate airtightness testing.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 东莞市宇承科技有限公司
- Filing Date
- 2025-06-27
- Publication Date
- 2026-06-23
AI Technical Summary
Existing airtightness testing equipment has a complex structure, is inconvenient to operate, and is prone to wear and tear when changing lens fixtures, which affects testing efficiency.
It adopts a flexible positioning component and an adjustable pressure surface design, combined with an airflow channel and plug structure, to achieve rapid and accurate airtightness testing, and is suitable for lenses of various specifications.
It improves the accuracy and efficiency of testing, reduces lens wear, and enhances the compatibility and ease of operation of the equipment.
Smart Images
Figure CN224398887U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of testing equipment technology, and in particular to a positioning fixture and a testing device for air tightness testing. Background Technology
[0002] As a precision optical instrument, the airtightness of a lens is crucial. When dust or fine particles enter the lens, it affects image quality, causing blurring or spots, and reducing resolution and contrast. Furthermore, water vapor in the air can corrode the lens, leading to mold growth or damage to the coating, significantly impacting its lifespan. This is especially true for lenses used in harsh environments, such as underwater lenses that must withstand water pressure. Therefore, good airtightness is key to ensuring the lens functions properly in these special conditions and extending its lifespan.
[0003] Existing technologies typically use airtightness testing benches to test the sealing performance of lenses. However, these benches are complex in structure and inconvenient to operate. Furthermore, lenses are mostly fixed to the testing fixtures with bolts, requiring different fixtures to be changed when testing different types of lenses. Frequent use can also cause wear between metal parts, and the fixture replacement operation is quite complicated, significantly impacting testing efficiency.
[0004] Therefore, there is an urgent need for an airtightness testing positioning fixture and an airtightness testing device to solve the above problems. Utility Model Content
[0005] According to one aspect of this utility model, an airtightness testing positioning fixture is provided. It has a simple structure, is easy to operate, can quickly and accurately test the airtightness of lenses, and has good compatibility, making it suitable for testing lenses of various specifications.
[0006] To achieve this objective, the present invention adopts the following technical solution:
[0007] Air tightness testing positioning fixture, including:
[0008] The first fixed base has an opening in the mounting groove, and a flexible positioning element is embedded in the mounting groove, and the workpiece to be tested is positioned on the flexible positioning element.
[0009] The second fixing seat is spaced apart from the first fixing seat and detachably connected. The second fixing seat has a pressing surface on the side facing the first fixing seat. The distance between the pressing surface and the first fixing seat is adjustable. The pressing surface is used to press the workpiece to be tested onto the flexible positioning member.
[0010] An airflow channel is provided in the first fixed base, and a vent hole is provided through the flexible positioning member. One end of the vent hole faces the workpiece to be tested, and the other end of the vent hole is connected to the airflow channel.
[0011] Optionally, it also includes a plug-in structure, which includes a pin seat and a pin body that plugs into the pin seat, wherein one of the pin seat and the pin body is disposed on the first fixing seat and the other is disposed on the second fixing seat.
[0012] Optionally, it also includes a connecting plate, one end of which is connected to the second fixing seat, and the other end of which is provided with the pin body, and the pin seat is disposed on the first fixing seat.
[0013] Optionally, the connecting plate is detachably connected to the second fixing seat; and / or,
[0014] The connecting plate is detachably connected to the pin body.
[0015] Optionally, a first positioning plate is provided on the side of the second fixed seat facing the first fixed seat, and the pressing surface is provided on the first positioning plate. The thickness of the first positioning plate is adjustable. When the second fixed seat is connected to the first fixed seat, the pressing surface presses against the workpiece to be tested.
[0016] Optionally, a limiting groove is formed on the pressing surface, and part of the workpiece to be tested can extend into the limiting groove.
[0017] Optionally, a second positioning plate is provided on the first fixed base, and a limiting hole is formed through the second positioning plate, the limiting hole being coaxially arranged with the mounting groove.
[0018] Optionally, the side wall of the mounting groove is provided with a snap-fit groove, and the flexible positioning member is provided with a snap-fit part, which is snapped into the snap-fit groove.
[0019] Optionally, the flexible positioning element is provided with a positioning groove, which is positioned and engaged with the positioning post of the workpiece to be tested.
[0020] According to another aspect of the present invention, an airtightness testing device is provided, comprising an airtightness leak detector and an airtightness testing positioning fixture as described in any of the above claims, wherein the vent is connected to the airtightness leak detector through the airflow channel.
[0021] The beneficial effects of this utility model are:
[0022] In the airtightness testing positioning fixture provided by this utility model, the flexible positioning component can be used to position and support the workpiece to be tested (such as a lens) without damaging the surface of the workpiece. The flexible positioning component is disposed within a first fixed base, which has an airflow channel. A vent hole is formed through the flexible positioning component, with one end of the vent hole facing the workpiece to be tested and the other end communicating with the airflow channel. When the second fixed base is connected to the first fixed base, the pressure surface on the side of the second fixed base facing the first fixed base can press the workpiece to be tested firmly onto the flexible positioning component. At this time, the gap between the flexible positioning component and the workpiece to be tested is reduced, the sealing performance is enhanced, which is beneficial for subsequent inflation testing of the workpiece to be tested using an inflation device, thereby improving the accuracy of the test. Meanwhile, the distance between the pressure surface and the first fixed seat is adjustable, and the second fixed seat is detachably connected to the first fixed seat. When it is necessary to test workpieces of different specifications and sizes, simply separate the second fixed seat from the first fixed seat and adjust the distance between the pressure surface and the first fixed seat to be applicable to the testing of workpieces of different heights; or change the size of the flexible positioning component to be applicable to workpieces of different diameters or widths. It has good compatibility and is easy to operate, which greatly improves the efficiency of airtightness testing. Attached Figure Description
[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of this utility model and these drawings without creative effort.
[0024] Figure 1 This is a schematic diagram of the first structure of the airtightness testing and positioning fixture provided in this embodiment of the utility model;
[0025] Figure 2 This is an exploded view of the airtightness testing and positioning fixture provided in this embodiment of the utility model;
[0026] Figure 3 This is a schematic diagram of the second structure of the airtightness testing and positioning fixture provided in this embodiment of the utility model;
[0027] Figure 4 This is a top view of the airtightness testing and positioning fixture provided in this embodiment of the utility model;
[0028] Figure 5 yes Figure 4 A cross-sectional view along the AA direction;
[0029] Figure 6 yes Figure 4 Cross-sectional view along the BB direction;
[0030] Figure 7 yes Figure 4 A cross-sectional view along the CC direction.
[0031] In the picture:
[0032] 1. First fixing seat; 11. Mounting slot; 12. Airflow channel; 13. Second positioning plate; 131. Limiting hole; 14. Snap-fit slot;
[0033] 2. Second fixed seat; 21. First positioning plate; 211. Pressing surface; 212. Limiting groove;
[0034] 3. Flexible positioning component; 31. Vent hole; 32. Snap-fit part; 33. Positioning groove;
[0035] 41. Gas source interface;
[0036] 51. Pin holder; 52. Pin body;
[0037] 6. Connecting plate. Detailed Implementation
[0038] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.
[0039] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.
[0040] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.
[0041] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.
[0042] In the description of this utility model, it should be noted that the terms "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.
[0043] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0044] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0045] In the description of this utility model, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this utility model, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.
[0046] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.
[0047] This embodiment provides an airtightness testing positioning fixture, which can be used to perform airtightness testing on a workpiece. The workpiece to be tested can be an optical lens, etc., and is not limited here.
[0048] like Figure 1 and Figure 2 As shown, the airtightness testing positioning fixture includes a first fixed base 1 and a second fixed base 2. The first fixed base 1 has a mounting groove 11, within which a flexible positioning element 3 is embedded. The workpiece to be tested is positioned on the flexible positioning element 3. This flexible positioning element 3 can be used to position and support the workpiece to be tested without causing damage to its surface. Exemplarily, the flexible positioning element 3 is made of rubber. Rubber products have good elasticity and excellent shock absorption properties, effectively absorbing impacts and vibrations, thereby reducing damage to the workpiece to be tested.
[0049] The second fixing seat 2 is spaced apart from and detachably connected to the first fixing seat 1. A pressing surface 211 is provided on the side of the second fixing seat 2 facing the first fixing seat 1. The distance between the pressing surface 211 and the first fixing seat 1 is adjustable. The pressing surface 211 is used to press the workpiece to be tested onto the flexible positioning member 3. An airflow channel 12 is formed inside the first fixing seat 1. A vent hole 31 is formed through the flexible positioning member 3. One end of the vent hole 31 faces the workpiece to be tested, and the other end of the vent hole 31 is connected to the airflow channel 12. It is understood that the other end of the vent hole 31 is connected to an external inflation device (such as an airtightness leak detector) through the airflow channel 12, so as to inflate the workpiece to be tested through the airflow channel 12 and the vent hole 31.
[0050] In other words, when the second fixed seat 2 is connected to the first fixed seat 1, the pressing surface 211 can press the workpiece to be tested onto the flexible positioning member 3. At this time, the gap between the flexible positioning member 3 and the workpiece to be tested is reduced, and the sealing performance is enhanced. This is beneficial for the subsequent inflation testing of the workpiece to be tested by an inflation device (such as an airtightness leak detector), thereby improving the accuracy of the test.
[0051] Meanwhile, the distance between the pressure surface 211 and the first fixed seat 1 is adjustable, and the second fixed seat 2 is detachably connected to the first fixed seat 1. When it is necessary to inspect workpieces of different sizes, simply separate the second fixed seat 2 from the first fixed seat 1 and adjust the distance between the pressure surface 211 and the first fixed seat 1 to accommodate workpieces of different heights. Alternatively, by changing the size of the flexible positioning component 3, it can be adapted to workpieces of different diameters or widths. This airtightness testing positioning fixture has good compatibility and is easy to operate, greatly improving the efficiency of airtightness testing.
[0052] Specifically, refer to Figure 2 and Figure 3A first positioning plate 21 is provided on the side of the second fixed base 2 facing the first fixed base 1, and a pressing surface 211 is provided on the first positioning plate 21. The thickness of the first positioning plate 21 is adjustable. When the second fixed base 2 is connected to the first fixed base 1, the pressing surface 211 presses against the workpiece to be tested. When the height of the workpiece to be tested changes, by replacing the first positioning plate 21 with one of different thicknesses, the pressing force of the pressing surface 211 on the workpiece to be tested can be guaranteed, effectively improving the applicability of this airtightness testing positioning fixture to workpieces of various specifications and sizes.
[0053] Furthermore, a limiting groove 212 is formed on the pressing surface 211, allowing part of the workpiece to be tested to extend into the limiting groove 212. The limiting groove 212 can limit the position of the workpiece when the first positioning plate 21 presses against it, preventing the workpiece from shifting position during the pressing process, thus affecting the accuracy of the test.
[0054] More specifically, in order to improve the positioning accuracy of the workpiece under test, such as Figure 2 As shown, the flexible positioning element 3 is provided with a positioning groove 33, which engages with the positioning post of the workpiece to be tested. Inserting the positioning post of the workpiece to be tested into the positioning groove 33 of the flexible positioning element 3 not only positions the workpiece but also protects the positioning post from deformation under stress during air permeation testing. It is understood that the shape and number of positioning grooves 33 can be designed according to the different structures of the workpiece to be tested, and are not limited here.
[0055] More specifically, refer to Figure 2 and Figure 5 The mounting groove 11 has a snap-fit groove 14 on its side wall, and the flexible positioning member 3 has a snap-fit part 32, which snaps into the snap-fit groove 14. This arrangement helps to improve the connection reliability between the flexible positioning member 3 and the first fixed seat 1, thereby ensuring the support stability of the workpiece to be tested placed on the flexible positioning member 3.
[0056] Preferably, a second positioning plate 13 is provided on the first fixed base 1, and a limiting hole 131 is formed through the second positioning plate 13. The limiting hole 131 is coaxially arranged with the mounting groove 11. When the workpiece to be tested is placed on the flexible positioning member 3, the second positioning plate 13 can ensure the coaxiality of the axis of the workpiece to be tested with the axis of the mounting groove 11, and prevent the workpiece to be tested from tilting.
[0057] Optionally, such as Figure 2 , Figures 4-7As shown, the airtightness testing positioning fixture also includes a plug-in structure, which includes a pin seat 51 and a pin body 52 that plugs into the pin seat 51. One of the pin seat 51 and the pin body 52 is disposed on the first fixed base 1, and the other is disposed on the second fixed base 2. The detachable connection between the first fixed base 1 and the second fixed base 2 is achieved through the pin seat 51 and the pin body 52, effectively avoiding the problems of inconvenient disassembly of bolted connections and frequent replacement of worn bolts, thus improving the efficiency of assembly and disassembly.
[0058] Specifically, one of the two pin holders 51 and pin body 52 is detachably mounted on the first fixing base 1, and the other is detachably mounted on the second fixing base 2. With this configuration, when the pin holder 51 or the pin body 52 is damaged, only the appropriate pin holder 51 or pin body 52 needs to be replaced, effectively reducing the cost of use.
[0059] More specifically, the airtightness testing positioning fixture also includes a connecting plate 6. One end of the connecting plate 6 is connected to the second fixed base 2, and the other end of the connecting plate 6 is provided with a pin body 52, with a pin seat 51 disposed on the first fixed base 1. In this embodiment, the middle part of the connecting plate 6 is detachably connected to the pin body 52, and both sides of the connecting plate 6 are detachably connected to the second fixed base 2. This arrangement not only ensures the connection strength and reliability between the connecting plate 6 and the second fixed base 2, but also helps to improve the uniformity of force on the pin body 52.
[0060] It is understandable that the connection between the connecting plate 6 and the pin body 52, the connection between the connecting plate 6 and the second fixed seat 2, and the connection between the pin seat 51 and the first fixed seat 1 can all be detachably connected by countersunk screws or bolts, which provides high connection strength and convenient disassembly.
[0061] Continue to refer to Figure 1 and Figure 2 The airtightness testing positioning fixture also includes an air source interface 41. The air inlet of the airflow channel 12 of the first fixed base 1 is located on the side wall of the first fixed base 1, and the air source interface 41 is located at the air inlet of the airflow channel 12 and is detachably connected to the air supply pipe of the inflation device. Furthermore, the connection between the air supply pipe and the air source interface 41 can be secured with a threaded knob to ensure a stable and secure air supply from the air source interface 41. During testing, gas can flow from the air supply pipe of the inflation device into the first fixed base 1, and then be input into the workpiece to be tested through the vent 31 of the flexible positioning member 3.
[0062] This embodiment also provides an airtightness testing device, including an airtightness leak detector and an airtightness testing positioning fixture provided in this embodiment.
[0063] Specifically, the vent 31 is connected to the air supply pipe of the airtightness leak detector via the airflow channel 12. The airtightness leak detector's instruments can then determine whether the workpiece meets the airtightness requirements. The structure and detection principle of the airtightness leak detector are existing technologies and will not be elaborated upon here.
[0064] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.
Claims
1. An airtightness testing positioning fixture, characterized in that, include: The first fixed seat (1) has an installation groove (11) and a flexible positioning element (3) is embedded in the installation groove (11). The workpiece to be tested is positioned on the flexible positioning element (3). The second fixed seat (2) is spaced apart from the first fixed seat (1) and detachably connected. The second fixed seat (2) has a pressing surface (211) on the side facing the first fixed seat (1). The distance between the pressing surface (211) and the first fixed seat (1) is adjustable. The pressing surface (211) is used to press the workpiece to be tested onto the flexible positioning member (3). An airflow channel (12) is provided in the first fixed base (1), and a vent hole (31) is provided through the flexible positioning member (3). One end of the vent hole (31) faces the workpiece to be tested, and the other end of the vent hole (31) is connected to the airflow channel (12).
2. The airtightness testing positioning fixture according to claim 1, characterized in that, It also includes a plug-in structure, which includes a pin seat (51) and a pin body (52) that plugs into the pin seat (51). One of the pin seat (51) and the pin body (52) is disposed on the first fixing seat (1), and the other is disposed on the second fixing seat (2).
3. The airtightness testing and positioning fixture according to claim 2, characterized in that, It also includes a connecting plate (6), one end of which is connected to the second fixing seat (2), and the other end of which is provided with the pin body (52), and the pin seat (51) is provided on the first fixing seat (1).
4. The airtightness testing positioning fixture according to claim 3, characterized in that, The connecting plate (6) is detachably connected to the second fixing seat (2); and / or, The connecting plate (6) is detachably connected to the pin body (52).
5. The airtightness testing positioning fixture according to claim 1, characterized in that, The second fixed seat (2) is provided with a first positioning plate (21) on the side facing the first fixed seat (1). The pressing surface (211) is provided on the first positioning plate (21). The thickness of the first positioning plate (21) is adjustable. When the second fixed seat (2) is connected to the first fixed seat (1), the pressing surface (211) presses against the workpiece to be tested.
6. The airtightness testing positioning fixture according to claim 5, characterized in that, A limiting groove (212) is provided on the pressing surface (211), and part of the workpiece to be tested can extend into the limiting groove (212).
7. The airtightness testing positioning fixture according to claim 1, characterized in that, The first fixed base (1) is provided with a second positioning plate (13), and a limiting hole (131) is provided through the second positioning plate (13). The limiting hole (131) is coaxially arranged with the mounting groove (11).
8. The airtightness testing positioning fixture according to any one of claims 1-7, characterized in that, The mounting groove (11) has a snap-fit groove (14) on its side wall, and the flexible positioning member (3) has a snap-fit part (32) which is snapped into the snap-fit groove (14).
9. The airtightness testing positioning fixture according to any one of claims 1-7, characterized in that, The flexible positioning component (3) is provided with a positioning groove (33), which is positioned and engaged with the positioning post of the workpiece to be tested.
10. An airtightness testing device, characterized in that, It includes an airtightness leak detector and an airtightness detection positioning fixture as described in any one of claims 1-9, wherein the vent (31) is connected to the airtightness leak detector through the airflow channel (12).