Filling and sealing type LC filter vibration test tool

Abstract

The utility model discloses a tool for a vibration test of a potting type LC filter, the tool comprises a base, a pore plate and a cover plate, the base is provided with a positioning pin, a fixing hole seat and a plurality of grooves used for installing elements to be tested, and a screw hole matched with a locking bolt is formed in the fixing hole seat; a positioning hole, a mounting hole and a plurality of pin penetrating holes are formed in the pore plate, the positioning pins correspondingly penetrate out of the positioning hole in the pore plate, and pins of a to-be-tested element extend out of the pin penetrating holes; the cover plate is provided with a positioning hole, a fixing hole and a plurality of spring probes, the positioning pin penetrating out of the hole plate penetrates into the positioning hole of the cover plate, the spring probes abut against the lead legs extending out of the lead leg penetrating-out holes in a one-to-one correspondence mode, and the locking bolt sequentially penetrates through the fixing hole and the mounting hole and is fixedly connected with the fixing hole seat. Therefore, the tool is in effective contact with the to-be-tested element fixed by the base and the pore plate through the downward pressure provided by the spring probe, the overall structure is fixed and reliable, the power-on requirement is met, and the tool is simple in overall structure and low in use and maintenance cost.

Description

Technical Field

[0001] This application relates to the field of electrical component testing fixtures, and more particularly to a fixture for vibration testing of potted LC filters. Background Technology

[0002] Power filters play a crucial role in electronic devices by ensuring power stability and suppressing electromagnetic interference. Encapsulated LC power filters are widely used in various electronic devices due to their excellent filtering performance and miniaturized design. To ensure that encapsulated LC power filters can withstand the stresses of random vibration environments in practical applications, their structural integrity and adaptability must be accurately simulated and tested.

[0003] During vibration testing, potted LC power filters need to be rigidly secured to the vibration table in the X, Y, and Z directions using fixtures before contacting the conductive surface for testing. Existing technology typically uses a snap-on aging mount to perform both power-on and vibration tests. This mount usually consists of a base, snap-on clips, terminals, and a vibration table interface. Specifically: the snap-on clips, typically made of springs or plastic, are used to secure the component under test; the terminals connect the power supply and the component; and the vibration table interface connects to the vibration table.

[0004] The steps for vibration testing using a snap-on aging mount can be summarized as follows: First, place the potted LC power filter under test onto the snap-on mount and secure it with the snaps; second, connect the power supply to the component under test, turn on the power, perform a power-on test, monitor the component's operating status, and observe for any abnormalities (such as overheating, short circuits, etc.); third, fix the snap-on aging mount onto the vibration table, set the vibration table's frequency, amplitude, and test time according to the test specifications, start the vibration table, and perform the vibration test. During the test, record the performance parameters of the component under test (such as voltage, current, temperature, etc.); finally, after the test, analyze the data to determine the component's reliability under vibration conditions.

[0005] Although the above-mentioned snap-fit ​​aging seat fixture can complete vibration testing, it still has the following drawbacks in practical applications:

[0006] First, the connection between the pins and the contact springs of the aging holder is prone to loosening and intermittent contact. This not only affects the accuracy of the test results but may also damage the filter pins. Second, the locking handle of the snap-fit ​​fixture is prone to fatigue and breakage after prolonged or repeated vibration tests, leading to a shortened service life. Furthermore, during vibration, the application of axial and radial stress may cause slight displacement between the pins and the springs. This displacement pushes the slider mechanism in the middle of the aging holder, gradually reducing the locking force and eventually causing the locking handle to loosen, or even damaging the appearance of the leads of the potted LC power filter itself.

[0007] Therefore, the current tooling used for vibration testing of potted LC power filters still has many shortcomings, and it is necessary to propose a new technical solution to solve the problems existing in the current technology. Utility Model Content

[0008] This application provides a fixture for vibration testing of potted LC filters to solve the problems of relatively complex structure and unreliable connection between pins and contact springs in traditional potted LC filter testing fixtures.

[0009] To achieve the above objectives, this application provides the following technical solution:

[0010] This application provides a fixture for vibration testing of a potted LC filter, including a base, a perforated plate, and a cover plate. The base is a plate-shaped structure with a positioning pin, a fixing hole seat, and several grooves. The positioning pin is a column perpendicular to the surface of the base. The fixing hole seat has a screw hole adapted to a locking bolt. The grooves are used to install the component to be tested. The perforated plate has a positioning hole, a mounting hole, and several lead-out holes. The positioning pin passes through the positioning hole on the perforated plate. The lead-out holes of the component to be tested in the grooves extend out of the lead-out holes. The mounting hole is vertically connected to the fixing hole seat. The cover plate has a positioning hole, a fixing hole, and several spring probes. The positioning pin, which passes through the perforated plate, enters the positioning hole of the cover plate. The spring probes abut against the lead-out holes one by one. The locking bolt passes through the fixing hole and the mounting hole in sequence and is fastened to the fixing hole seat on the base.

[0011] Furthermore, in the above technical solution, two positioning pins are arranged opposite each other on the upper plate surface of the base, and a fixing hole seat is provided between the two positioning pins, and the component to be tested is installed upside down in the groove.

[0012] Furthermore, the size and shape of the groove are matched to the size and shape of the element under test.

[0013] Furthermore, the base has several connection holes on its edge for connecting and fixing with external devices.

[0014] Furthermore, a boss is formed on the upper surface of the perforated plate, and the positioning hole and the mounting hole are both through holes opened on the boss. The lead leg protrusion hole is located around the boss.

[0015] Furthermore, the top of the boss is provided with several threaded holes, and each positioning hole is surrounded by multiple threaded holes; the positioning holes on the cover plate are surrounded by multiple through holes, and one through hole and one threaded hole are connected vertically to form a fastening channel adapted to the fastening bolt.

[0016] Furthermore, each of the test components has multiple leads, each lead protrusion hole on the orifice plate corresponds one-to-one with each lead, and each spring probe on the cover plate corresponds one-to-one with a lead protruding from the lead protrusion hole.

[0017] Compared with the prior art, this application has at least the following beneficial effects:

[0018] Based on further analysis and research of existing technical problems, this application recognizes that traditional snap-fit ​​aging fixtures have many defects in use, especially the unreliable connection at the pin and contact spring connection. Therefore, this application provides a novel fixture for vibration testing of potted LC filters. Compared to traditional snap-fit ​​fixtures, this fixture consists of three parts: a base, a perforated plate, and a cover plate. The groove on the base and the lead-out holes on the perforated plate serve to fix the component under test (potted LC filter). The spring probe on the cover plate forms a reliable connection with the lead-out. The cover plate applies electrical stress to each product in series during the test, meeting the energizing requirements. Furthermore, compared to the original snap-fit ​​design, this fixture uses spring probes to more effectively prevent friction caused by loosening due to aging, which could lead to incomplete contact between the product's leads and the fixture clamps. The downward pressure provided by the probes and springs forms an effective contact connection with the test component fixed by the base and orifice plate. Overall, this fixture has a simple structure; the base, orifice plate, and cover plate are stacked and assembled, positioned by locating pins and tightened by locking bolts, ensuring reliable fixation of the test component. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the embodiments will be briefly described 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. It should be understood that the specific shapes and structures shown in the drawings should not generally be regarded as limiting conditions for implementing this application; for example, based on the technical concepts disclosed in this application and the exemplary drawings, those skilled in the art are able to easily make conventional adjustments or further optimizations to the addition / reduction / classification, specific shapes, positional relationships, connection methods, and size ratios of certain units (components).

[0020] Figure 1 This is a schematic diagram of the structure of the base in one embodiment of this application;

[0021] Figure 2 This is a schematic diagram of the structure of the perforated plate in one embodiment of this application;

[0022] Figure 3This is a schematic diagram of the structure of the cover plate in one embodiment of this application;

[0023] Figure 4 This is a schematic diagram of the structural connection state of the tooling provided in this application in a combined use state in one embodiment.

[0024] Explanation of reference numerals in the attached figures:

[0025] 1. Base; 11. Positioning pin; 12. Fixing hole seat; 13. Groove; 14. Connecting hole;

[0026] 2. Perforated plate; 21. Positioning hole; 22. Mounting hole; 23. Lead-out hole; 24. Boss; 25. Threaded hole;

[0027] 3. Cover plate; 31. Positioning hole; 32. Fixing hole; 33. Spring probe; 34. Fastening bolt;

[0028] 4. Tighten the bolts;

[0029] 5. Component to be tested; 51. Lead-in leg. Detailed Implementation

[0030] The present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0031] In the description of this application: unless otherwise stated, "multiple" or "several" means two or more. The terms "first," "second," "third," etc., in this application are intended to distinguish the objects they refer to and do not have any special meaning in terms of technical connotation (e.g., they should not be construed as an emphasis on importance or order). Expressions such as "including," "comprising," and "having" also mean "not limited to" (certain units, components, materials, steps, etc.).

[0032] The terms used in this application, such as "upper," "lower," "left," "right," and "middle," are generally used to facilitate intuitive understanding by referring to the accompanying drawings, and are not absolute limitations on the positional relationships in the actual product. Changes in these relative positional relationships, without departing from the technical concept disclosed in this application, should also be considered within the scope of this application.

[0033] This application provides a fixture for vibration testing of potted LC filters. This fixture can be used for energizing and vibrating tests of potted LC power filters during vibration. Compared with traditional snap-fit ​​fixtures, this fixture mainly consists of three parts: a base 1, a perforated plate 2, and a cover plate 3. The base 1 and the perforated plate 2 serve to fix the product (i.e., the potted LC filter element to be tested) to the test bench. The cover plate 3 applies electrical stress to each product in series during the test. In addition, this application uses a spring probe 33 to abut against the lead leg 51 for energizing. Compared with the original snap-fit ​​design, this can more effectively avoid friction caused by loosening due to aging and resulting in a loose connection between the product lead leg and the fixture clamp. The downward pressure provided by the probe and the spring forms effective contact with the product fixed by the base 1 and the perforated plate 2, enabling the vibration test to achieve the product energizing requirement. The structural composition of this fixture is described in detail below.

[0034] I. Base

[0035] The base 1 in this application is a plate-shaped structural component. The base 1 is provided with positioning pins 11, fixing holes 12, and several grooves 13 for mounting the test component 5. Among them, the positioning pins 11 are columns perpendicular to the surface of the base 1, and preferably there are two or more positioning pins 11; the fixing holes 12 are formed with screw holes that are adapted to the locking bolts 4.

[0036] In this application, the positioning pin 11 is perpendicular to the surface of the base 1. The structural design of the positioning pin 11 allows for quick vertical alignment and installation of the base 1, the perforated plate 2, and the cover plate 3. Therefore, the positioning pin 11 provides better fixation and positioning during the test, preventing the test element 5 from shifting during vibration. Through precise structural alignment, it ensures that the lead leg 51 of the test element 5 reliably abuts against the spring probe 33, thus ensuring the accuracy of the test results.

[0037] In this fixture, the dimensions and shape of the groove 13 are matched to the dimensions and shape of the component 5 to be tested. Therefore, in practical applications, the shape and dimensions of the groove 13 can be changed according to the product; that is, a suitable groove 13 can be designed and manufactured according to different shapes and sizes of the component 5 to be tested. The groove 13 in this fixture can effectively disperse axial and radial stress during vibration, preventing relative displacement between the lead leg 51 and the spring probe 33.

[0038] The base 1 in this application is preferably made of epoxy resin material, but other materials can also be used.

[0039] like Figure 1 Two positioning pins 11 are arranged opposite each other on the upper surface of the base 1, and a fixing hole seat 12 is provided between the two positioning pins 11. The fixing hole seat 12 is a protrusion extending upward from the upper surface of the base 1. Figure 4The component to be tested, 5, is inverted and embedded in the groove 13. The lead of the component to be tested, 5, extends out of the groove 13 and upward through the lead through hole 23 on the perforated plate 2. In a specific application example, the component to be tested, 5, is inverted and installed in the groove 13. The shape and size of the lead through hole 23 are adapted to the shape and size of the lead cross-section. The shape, size, and position of the lead through hole 23 in the tooling can be designed and manufactured according to the product lead.

[0040] In one embodiment of this application, a plurality of connection holes 14 are provided at the edge of the base 1 for connecting and fixing with external equipment. The connection holes 14 can reliably fix the fixture to the external equipment to facilitate test operation. The external equipment can be a test platform.

[0041] II. Orifice Plate

[0042] The orifice plate 2 in this application can be made of epoxy resin material. The orifice plate 2 has positioning holes 21, mounting holes 22 and several lead-out holes 23. During assembly, the positioning pins 11 on the base 1 protrude through the positioning holes 21 on the orifice plate 2, and the lead-out holes 51 of the test element 5 in the groove 13 extend out of the lead-out holes 23. The mounting holes 22 are vertically connected to the fixing hole seat 12.

[0043] like Figure 2 A boss 24 is formed on the upper surface of the perforated plate 2. Positioning holes and mounting holes 22 are through holes formed on the boss 24. Several lead-out holes 23 are located around the boss 24. The height of the boss 24 is determined by the length of the lead-out hole 23 protruding from the boss and the length of the spring probe 33 protruding from the lower surface of the cover plate 3. During structural installation, it is sufficient to ensure that the lead-out can compress the spring probe 33 and form a reliable and effective contact with it. Figure 4 .

[0044] Continue to see Figure 2 The top of the boss 24 is provided with several threaded holes 25, and each positioning hole is surrounded by multiple threaded holes 25. See also... Figure 3 , 4 The cover plate 3 has multiple through holes around the positioning holes. Each through hole is connected to a threaded hole 25, forming a fastening channel that matches the fastening bolt 34. Therefore, the cover plate 3 and the orifice plate 2 are reliably fixed together by the fastening bolt 34, ensuring stable and reliable structural installation.

[0045] In this application, the perforated plate 2 has several lead-out holes 23. In specific manufacturing applications, the position, shape and size of the lead-out holes 23 are adapted to the position of the groove 13 on the base 1 and the shape and size of each lead on the test element 5 installed upside down in the groove 13.

[0046] III. Cover Plate

[0047] The cover plate 3 in this application can be made of epoxy resin material, such as... Figure 3 The cover plate 3 has positioning holes 31, fixing holes 32, and several spring probes 33. During assembly, the positioning pins 11 that protrude from the perforated plate 2 are inserted into the positioning holes 31 of the cover plate 3, and the spring probes 33 abut against the leads 51 that protrude from the leads through the leads through the leads through the leads 23. The locking bolts 4 pass through the fixing holes on the cover plate 3 and the mounting holes 22 on the perforated plate 2 in sequence and are fastened to the fixing holes 12 on the base 1, thereby achieving the combined fixation of the base 1, the perforated plate 2, and the cover plate 3.

[0048] Each test element 5 in this application has multiple leads. Preferably, each lead protrusion hole 23 on the orifice plate 2 corresponds to each lead, and each spring probe 33 on the cover plate 3 corresponds to a lead protruding from the lead protrusion hole 23.

[0049] The spring probe 33 in this application is a structural component composed of a spring and a probe. It has the functions of extension and conductivity. The shape and style of the probe can be changed according to different products, and the spring can be replaced with a straight cylinder or a different material according to different test requirements.

[0050] When using the tooling provided in this application, one or more test components 5 are first installed in the groove 13 of the base 1. Then, the orifice plate 2 is aligned and installed on the positioning pin 11 of the base 1 through the positioning holes on the orifice plate 2. The lead of the test component 5 passes through the lead protrusion hole 23 on the orifice plate 2, so that the orifice plate 2 and the base 1 are aligned and the product shell is fixed. The base 1 and the orifice plate 2 fix and limit the test component 5. Then, the cover plate 3 is aligned and installed on the positioning pin 11 through the positioning holes on the cover plate 3. The spring probe 33 abuts against the lead protrusion hole 23 one by one. Then, the locking bolt 4 passes through the fixing hole on the cover plate 3 and the mounting hole 22 on the orifice plate 2 in sequence and is threaded to the fixing hole seat 12 on the base 1. The cover plate 3 and the orifice plate 2 are fastened with the fastening bolt 34. After assembly, the test power-on process is completed by the spring probe 33.

[0051] The matching design of the fixing hole seat 12 and the locking bolt 4 in this application makes the connection more secure, can withstand greater vibration and impact, and reduces the risk of tooling loosening during testing. The use of the locking bolt 4 simplifies the installation and disassembly process of the components and facilitates the quick replacement of the test component 5 in different experiments.

[0052] In summary, this application provides a fixture for vibration testing of potted LC filters. Applying this fixture can effectively avoid the problem of poor contact caused by loose connections or loose locking handles during the energized vibration test of traditional potted LC power filters. This fixture achieves electrical connection by pressing down on the structure to make the probe of the test spring probe contact the lead of the product under test, thus completing the entire energized test process. The fixture has a simple overall structure, is easy to use, and provides reliable testing. It also has low manufacturing, use, installation, and maintenance costs, and a longer structural lifespan.

[0053] The technical features of the above embodiments can be combined in any way (as long as there is no contradiction in the combination of these technical features). For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described; these embodiments not explicitly written should also be considered to be within the scope of this specification.

[0054] The present application has been described in a relatively specific and detailed manner above through general descriptions and specific embodiments. It should be understood that, based on the technical concept of the present application, several conventional adjustments or further innovations can be made to these specific embodiments; however, as long as they do not depart from the technical concept of the present application, the technical solutions obtained by these conventional adjustments or further innovations also fall within the protection scope of the claims of the present application.

Claims

1. A fixture for vibration testing of a potted LC filter, characterized in that, It includes a base, a perforated plate, and a cover plate; the base is a plate-shaped structural component, and the base is provided with a positioning pin, a fixing hole seat, and several grooves. The positioning pin is a column perpendicular to the surface of the base, the fixing hole seat has a screw hole adapted to a locking bolt, and the grooves are used to install the component to be tested. The perforated plate has positioning holes, mounting holes and several lead-out holes. The positioning pins pass through the positioning holes on the perforated plate. The lead-outs of the component to be tested in the groove extend out from the lead-out holes. The mounting holes are vertically connected to the fixing hole base. The cover plate has positioning holes, fixing holes and several spring probes. The positioning pins that pass through the hole plate are inserted into the positioning holes of the cover plate. The spring probes abut against the leads that extend out of the lead lead through the lead lead through the hole. The locking bolts pass through the fixing holes and the mounting holes in sequence and are fastened to the fixing hole seat on the base.

2. The fixture for vibration testing of potted LC filters according to claim 1, characterized in that, The upper plate of the base has two positioning pins facing each other, and a fixing hole is provided between the two positioning pins. The component to be tested is installed upside down in the groove.

3. The fixture for vibration testing of potted LC filters according to claim 1 or 2, characterized in that, The size and shape of the groove are respectively matched to the size and shape of the component to be tested; The base has several connection holes on its edge for connecting and fixing with external devices.

4. The fixture for vibration testing of potted LC filters according to claim 1, characterized in that, The upper surface of the perforated plate forms a boss, and the positioning hole and the mounting hole are both through holes opened on the boss. The leg protrusion hole is located around the boss.

5. The fixture for vibration testing of the potted LC filter according to claim 4, characterized in that, The top of the boss is provided with several threaded holes, and each positioning hole is surrounded by multiple threaded holes; the positioning holes on the cover plate are surrounded by multiple through holes, and one through hole and one threaded hole are connected vertically to form a fastening channel adapted to the fastening bolt.

6. The fixture for vibration testing of potted LC filters according to claim 1, characterized in that, Each of the test components has multiple leads, each lead protrusion hole on the orifice plate corresponds to a lead, and each spring probe on the cover plate corresponds to a lead protruding from the lead protrusion hole.

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