Filter test fixture

Abstract

The utility model discloses a filter test clamp, the filter comprises a main body and a shielding cover adhered to the main body through colloid, the filter test clamp comprises a base, a test board arranged on the base, an upper cover hinged to the base, an I / O pin arranged on the test board, and a clamping piece arranged on the base and used for clamping the I / O pin. The radio frequency connector simultaneously penetrates through the base and the test board, the base, the test board and the upper cover are all made of metal, and the base and the upper cover are hinged through a metal shaft. According to the scheme, the test fixture improves the grounding performance of the filter during test, and solves the problems of poor grounding performance and inaccurate test result caused by gluing of the main body and the shielding cover of the filter.

Description

Technical Field

[0001] The utility model relates to the technical field of filter testing, in particular to a filter testing fixture. Background Art

[0002] A filter is a filtering circuit composed of capacitors, inductors, and resistors. It can effectively filter out frequencies at or outside of a specific frequency in the power line, obtaining a power signal at a specific frequency or eliminating a power signal at a specific frequency.

[0003] In order to avoid interference in signal transmission, a shielding cover is usually welded to the outside of the main body of the existing filter. However, the solder joints used to connect the shielding cover and the main body are prone to fall off in a high temperature environment of about 235°C, affecting the reliability of the connection between the shielding cover and the main body. In order to solve the above problems, those skilled in the art continue to study the feasibility of using glue to connect the shielding cover and the main body. The performance test of the filter (such as electrical performance test, network performance test) is an important process in production. During the performance test, the filter needs to be clamped to keep it stable so as not to affect the test. Most of the existing test fixtures are designed based on welded shielding covers and are not suitable for testing filters with glued shielding covers. Therefore, there is an urgent need to develop a new test fixture for testing filters with glued shielding covers. Utility Model Content

[0004] In order to overcome the defects in the prior art, an embodiment of the present invention provides a filter test fixture, which improves the grounding performance during filter testing and solves the problem of poor grounding performance and inaccurate test results caused by the adhesion between the main body and the shielding cover.

[0005] An embodiment of the present application discloses: a filter test fixture, wherein the filter includes a main body and a shielding cover bonded to the main body by colloid, the filter test fixture includes: a base, a test table arranged on the base, an upper cover hinged to the base, I / O pins arranged on the test table, and a radio frequency connector that passes through the base and the test table at the same time, the base, the test table and the upper cover are all made of metal, and the base and the upper cover are hinged by a metal shaft.

[0006] Specifically, the test bench is provided with a first groove, the I / O pin is arranged in the first groove, and the radio frequency connector is passed through the bottom of the first groove.

[0007] Specifically, the first groove has a first wall and a second wall arranged opposite to each other, the first wall and the second wall are used to limit the filter, and the first wall and / or the second wall are provided with an arc wall protruding toward the outside of the first groove.

[0008] Specifically, a second groove is provided on the side of the upper cover facing the test bench, and the second groove is used to abut against the test bench. The second groove includes a first side wall, a second side wall and a front wall. The first side wall and the second side wall are arranged opposite to each other, and the front wall is located between the first side wall and the second side wall and away from one end of the metal shaft.

[0009] Specifically, a third groove is provided in the second groove, and the third groove is used to press the filter located in the first groove.

[0010] Specifically, the base and the test bench are milled from the same metal block.

[0011] Specifically, the metal block is provided with a step surface, and the test bench is located on the step surface so that a first channel for accommodating the first side wall and a second channel for accommodating the second side wall are formed between the base and the test bench, and the front wall of the second groove abuts against the step surface.

[0012] Specifically, the base, the test bench and the upper cover are made of aluminum or copper.

[0013] The utility model has at least the following beneficial effects:

[0014] 1. The filter test fixture of this embodiment utilizes the test bench and the upper cover to accurately touch the contact points, and achieves close contact between the upper and lower parts when the upper cover is pressed down, ensuring the testing of the product. At the same time, since the base, test bench and upper cover are all made of metal, the grounding performance of the filter during testing is improved, solving the problem of poor grounding performance and inaccurate test results of the filter due to the adhesion between the main body and the shielding cover.

[0015] 2. The filter test fixture of this embodiment has a simple and reliable structure.

[0016] In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 This is a schematic structural diagram of the filter test fixture in one embodiment of the present utility model at one viewing angle;

[0019] Figure 2 This is a schematic structural diagram of the filter test fixture in another perspective according to an embodiment of the present invention;

[0020] Figure 3 yes Figure 2 A partial enlarged view of point A in the middle;

[0021] Figure 4 This is a structural diagram of the filter test fixture in another perspective in an embodiment of the present utility model.

[0022] The figure marks in the above drawings are: 1. base; 11. step surface; 111. first channel; 112. second channel; 2. test bench; 21. first groove; 211. arc wall; 3. upper cover; 31. second groove; 311. first side wall; 312. second side wall; 313. front wall; 32. third groove; 4. I / O pin; 5. RF connector; 6. metal shaft; 10. filter. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," "fixed," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0025] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first feature and the second feature being in direct contact, or may include the first feature and the second feature being in contact not directly but through another feature therebetween. Moreover, a first feature being "above," "below," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0026] In the description of this embodiment, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of protection of this application.

[0027] In addition, the terms "first", "second", etc. are only used to distinguish in description and have no special meaning.

[0028] Combine Figures 1 to 3 As shown, the filter test fixture of this embodiment is used to clamp the filter 10 whose main body and shielding cover are bonded together by colloid, so as to perform performance testing. The filter test fixture mainly includes: a base 1, a test bench 2 arranged on the base 1, an upper cover 3 hinged to the base 1, an I / O pin 4 arranged on the test bench 2, and a radio frequency connector 5, which passes through the base 1 and the test bench 2 from bottom to top and is fixed to the base 1. When testing is required, the filter 10 is placed on the test bench 2, the ports on the main body of the filter 10 are connected to the I / O pin 4 and the radio frequency connector 5 respectively, and the upper cover 3 is rotated in the direction toward the base 1 so that the upper cover 3 presses the shielding cover of the filter 10. Since the main body of the filter 10 and the shielding cover are bonded together by colloid, which is not a conductor, in order to achieve the ground connection of the shielding cover and thus accurately simulate the waveform test of the welding filter 10, the base 1, test bench 2 and upper cover 3 of this embodiment are all made of metal, and the base 1 and the upper cover 3 are hinged by a metal shaft 6.

[0029] Through the above structure, the filter test fixture of this embodiment can accurately touch the contact points using the test table 2 and the upper cover 3, and achieve close contact between the upper and lower parts when the upper cover 3 is pressed down, thereby ensuring the testing of the product. At the same time, since the base 1, the test table 2 and the upper cover 3 are all made of metal, the grounding performance of the filter 10 is improved during testing, and the problem of poor grounding performance and inaccurate test results of the filter 10 due to the adhesion between the main body and the shielding cover is solved.

[0030] Specifically, if Figure 2 and Figure 3As shown, the test bench 2 of this embodiment is provided with a first groove 21 for positioning the filter 10 to be tested, the above-mentioned I / O pin 4 is arranged in the first groove 21, and the bottom of the RF connector 5 passing through the first groove 21 is fixed in the first groove 21. The shape of the first groove 21 is substantially similar to the shape of the shielding cover of the filter 10. In this embodiment, the shielding cover is substantially rectangular, and therefore, the first groove 21 is also rectangular. The first groove 21 has a first wall surface and a second wall surface that are arranged opposite to each other, and the first wall surface and the second wall surface are arranged in parallel to limit the filter 10. Preferably, the first wall surface and / or the second wall surface are provided with an arc wall 211 protruding toward the outside of the first groove 21, so that the arc wall 211 can avoid the fingers of people or clamping tools during the process of taking and placing the filter 10 to be tested, thereby facilitating the taking and placing of the filter 10.

[0031] like Figure 4 As shown, the upper cover 3 of this embodiment has a second groove 31 on the side facing the test bench 2. The second groove 31 is used to abut the test bench 2 when the upper cover 3 and the base 1 are closed. Furthermore, the second groove 31 includes a first side wall 311, a second side wall 312, and a front wall 313, wherein the first side wall 311 and the second side wall 312 are arranged opposite each other, and the front wall 313 is located between the first side wall 311 and the second side wall 312 and at the end of the upper cover 3 away from the metal shaft 6. Preferably, a third groove 32 is provided in the second groove 31. The third groove 32 is used to press the filter 10 located in the first groove 21 when the upper cover 3 and the base 1 are closed, and also serves to limit the filter 10.

[0032] Preferably, the base 1 and the test bench 2 of this embodiment can be milled from the same metal block, which is beneficial to improve the position accuracy between the two. Figure 2 As shown, the metal block is provided with a stepped surface 11, on which the test bench 2 is located, and the portion outside the test bench 2 is the base 1. Furthermore, a first channel 111 and a second channel 112 are formed between the base 1 and the test bench 2. The first channel 111 is used to accommodate the first side wall 311 of the upper cover 3, and the second channel 112 is used to accommodate the second side wall 312 of the upper cover 3. When the upper cover 3 and the base 1 are closed, the front wall 313 of the upper cover 3 abuts against the stepped surface 11 of the base 1. Using this solution, the first channel 111 and the second channel 112 can limit the upper cover 3 in the horizontal direction.

[0033] Specifically, the base 1 , the test bench 2 and the upper cover 3 of this embodiment can be made of aluminum or copper.

[0034] The present invention uses specific embodiments to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A filter test fixture, the filter comprising a main body and a shielding cover bonded to the main body by colloid, characterized in that: The filter test fixture includes: a base, a test bench arranged on the base, an upper cover hinged to the base, I / O pins arranged on the test bench, and a radio frequency connector that passes through both the base and the test bench. The base, test bench and upper cover are all made of metal, and the base and the upper cover are hinged by a metal shaft.

2. The filter test fixture according to claim 1, characterized in that: The test bench is provided with a first groove, the I / O pin is arranged in the first groove, and the radio frequency connector is passed through the bottom of the first groove.

3. The filter test fixture according to claim 2, characterized in that: The first groove has a first wall and a second wall that are arranged opposite to each other. The first wall and the second wall are used to limit the filter. The first wall and / or the second wall are provided with an arc wall protruding toward the outside of the first groove.

4. The filter test fixture according to claim 2, characterized in that: A second groove is provided on the side of the upper cover facing the test bench, and the second groove is used to abut against the test bench. The second groove includes a first side wall, a second side wall and a front wall. The first side wall and the second side wall are arranged opposite to each other, and the front wall is located between the first side wall and the second side wall and away from one end of the metal shaft.

5. The filter test fixture according to claim 4, characterized in that: A third groove is provided in the second groove, and the third groove is used to press the filter located in the first groove.

6. The filter test fixture according to claim 4, characterized in that: The base and the test bench are milled from the same metal block.

7. The filter test fixture according to claim 6, characterized in that: The metal block is provided with a step surface, and the test bench is located on the step surface so that a first channel for accommodating the first side wall and a second channel for accommodating the second side wall are formed between the base and the test bench, and the front wall of the second groove abuts against the step surface.

8. The filter test fixture according to claim 1, characterized in that: The base, the test bench and the upper cover are made of aluminum or copper.

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