CN111722083A - A non-soldering type rapid test mechanism for printed boards - Google Patents

Abstract

The invention discloses a non-welding type quick test mechanism for printed boards, which relates to the technical field of active phased array radar antenna arrays, and includes an elastic needle radio frequency connector, a structural fixing board, a tested printed board and a fastening board. The mechanism makes reliable non-soldering contact with the corresponding tested port of the tested printed board through multiple elastic needle connectors at the same time, and connects the internal circuit of the tested printed board. Only the structural fixing plate and the elastic needle are used for RF connection The tester performs non-soldering test on the printed board, which overcomes the disadvantages of heavy workload, complicated operation, and easy damage to the printed board in the traditional test process of "soldering connector - testing - desoldering connector"; Refine the dimension chain design for the outline of the RF connector probe and the outline dimension of the fixed board to ensure reliable contact between the connector needle and the edge of the metallized hole of the printed board, without damaging the inner wall of the metallized hole of the printed board, and improve the testability of the printed board. reliability and operability.

Description

A non-soldering type rapid test mechanism for printed boards

technical field

The invention relates to the technical field of active phased array antenna arrays, in particular to a non-welding type rapid testing mechanism for printed boards.

Background technique

The printed board is an important carrier of electrical properties such as the antenna unit, internal detection network, and comprehensive layer in the radar, and is an important part of the radar performance and tactical indicators. With the rapid development of active phased array radar technology, requirements for easy installation and disassembly, and reliable testing are also put forward for large-scale antenna unit testing. In order to meet the good electrical performance and detect the reliability of the connection of the printed board in advance, it is necessary to install loads on multiple ports on the printed board. For the traditional test method, the RF connectors are generally welded at all the tested ports to install the load. Although the test is intuitive, it has the disadvantages of complicated operation. After the test is completed, the load needs to be removed by de-soldering, and it is easy to cause damage to the metallized vias of the printed board. Aiming at the requirement for reliable, fast and reusable printed board testing, the present invention designs a non-soldering fast testing mechanism for printed boards.

SUMMARY OF THE INVENTION

In view of the problems existing in the prior art, the purpose of the present invention is to design a printed board testing mechanism with novel structure, high reliability, convenient installation, no damage to the printed board to be tested, and meeting the requirements of the RF connection test of the printed board .

In order to achieve the above purpose, the present invention provides the following technical solutions: including an elastic needle radio frequency connector, a structural fixing plate, a printed board under test and a fastener, the elastic needle radio frequency connector is installed on the fixing plate, and at the same time, the elastic needle radio frequency connector is fastened. The component connects the tested printed board and the elastic pin RF connector together, and fixes the testing printed board on the other side of the fixed board; the elastic pin RF connector includes a radio frequency connector joint, a radio frequency connector method The flange is connected to the RF connector elastic inner conductor, while the RF connector flange is fixedly installed in the middle position of the RF connector connector, and the RF connector elastic inner conductor is connected to the bottom of the RF connector connector.

As a further solution of the present invention: the structural fixing board includes a radio frequency connector mounting surface and a printed board mounting surface, the radio frequency connector mounting surface and the printed board mounting surface are fixed and welded to form an integrated structure, and at the same time the structural fixing board is provided with A plurality of RF connector mounting holes, the RF connector flange is fitted and installed on the RF connector mounting surface through the RF connector mounting holes, and at the same time a group of RF connector mounting holes is provided with an inner conductor via hole in the middle position. The position of the inner conductor via hole of the RF connector corresponds to the position of the elastic inner conductor of the RF connector. The elastic inner conductor of the RF connector passes through the inner conductor via hole of the RF connector and protrudes from the mounting surface of the printed board of the structural fixing board.

As a further solution of the present invention: the mounting surface of the printed board is provided with a number of mounting holes for the printed board, and at the same time, a number of fixing holes for the printed board to be tested corresponding to each other are provided on the printed board to be tested. It is mounted on the structural fixing board by means of fasteners, and at this time, the fixing surface of the printed board is attached to the mounting surface of the printed board of the structural fixing board.

As a further solution of the present invention, a plurality of welding avoidance grooves are provided on the mounting surface of the printed board, and the welding avoidance grooves and the solder joints of the printed board connector correspond to each other.

As a further solution of the present invention, the size and tolerance of the installation hole of the radio frequency connector in the structural fixing plate meet the installation and matching requirements of the elastic needle radio frequency connector.

As a further solution of the present invention: the size of the inner conductor of the RF connector in the elastic needle RF connector, the size of the distance from the mounting surface of the RF connector in the structural fixing board to the mounting surface of the printed board, the port to be tested in the tested printed board Dimensions, dimensions and tolerances of the three meet the requirements of reliable contact between the elastic inner conductor of the RF connector and the metallized orifice of the port to be tested on the printed board after installation.

As a further solution of the present invention: the number of the elastic needle radio frequency connectors is consistent with the number of ports to be tested on the printed board under test.

As a further scheme of the present invention: the described non-welding type rapid test mechanism for printed boards, the specific operation steps are as follows:

Step 1: The elastic needle RF connector is installed and fixed on the corresponding position of the structural fixing plate by screws to ensure that the elastic needle RF connector is fixed reliably, and the mounting surface of the elastic needle RF connector is fitted with the RF connector mounting surface, and then the test print The board is fixed on the mounting surface of the printed board with screws. At this time, the needle of the RF connector is attached to the metallized via hole of the tested port of the printed board, and the elastic inner conductor of the RF connector is in contact with the internal circuit of the printed board.

Step 2: At this point, the construction of the test mechanism is completed, and the RF connector connector is connected with the connector of the printed board under test. The load and RF cable can be installed on the connector of the RF connector and the connector of the printed board under test. Conduct electrical performance tests such as circuit on-off and standing wave tests;

Step 3: After the test, remove the printed board under test from the structural fixing board. The shape of the printed board under test is intact, and the metallized hole under test is not damaged. Reuse and test the electrical properties of other printed boards under test.

Compared with the prior art, the beneficial effects of the present invention are:

(1) The mechanism only uses structural fixing plates, elastic needle RF connectors, fasteners, and cooperates with testing electronic equipment (cables, loads, computers, analyzers, etc.) to test printed boards, with simple structure and quick installation. , At the same time, no welding is performed during the test process, the connection is reliable, the test is fast, and the test mechanism can be reused many times;

(2) When the elastic needle RF connector is matched with the tested port of the printed board, it only makes contact at the position of the metallized hole of the printed board. force to avoid the occurrence of metallized holes and pads of the printed board due to plugging and unplugging damage;

(3) Through the refined size chain design, the adjustment of the position of the connector or the printed board during the assembly process is avoided, and the test efficiency is improved. Compared with the traditional welding test method, the test efficiency is increased by more than 50%.

Description of drawings

FIG. 1 is a schematic structural diagram of the present invention.

FIG. 2 is a schematic structural diagram of the elastic needle radio frequency connector of the present invention.

FIG. 3 is a schematic structural diagram of a mounting surface of a radio frequency connector of the present invention.

FIG. 4 is a schematic diagram of the structure of the mounting surface of the printed board according to the present invention.

FIG. 5 is a front view of the tested printed board of the present invention.

FIG. 6 is a back view of the tested printed board of the present invention.

FIG. 7 is a schematic diagram of the mating structure of the elastic needle RF connector of the present invention and the printed board under test.

As shown in the picture: 1. Elastic needle RF connector, 11. RF connector connector, 12. RF connector flange, 13. RF connector elastic inner conductor, 2. Structure fixing plate, 21. RF connector mounting surface , 22, PCB mounting surface, 23, RF connector mounting holes, 24, RF connector inner conductor vias, 25, Solder joint avoidance groove, 26, PCB mounting holes, 3. Tested PCB, 31. The tested printed board connector, 32, the fixed surface of the tested printed board, 33, the tested printed board port to be tested, 34, the tested printed board connector solder joint, 35, the tested printed board Fixing holes, 4. Fasteners.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that, unless otherwise expressly specified and limited, the terms "installation", "provided with", "sleeve/connection", "connection", etc., should be understood in a broad sense, such as " Connection", which can be a fixed connection, a detachable connection, or an integral connection, a mechanical connection, an electrical connection, a direct connection, or an indirect connection through an intermediate medium, or an internal connection between two components. of connectivity. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations.

Referring to FIGS. 1 to 7 , in an embodiment of the present invention, a non-welding type rapid test mechanism for a printed board includes an elastic needle radio frequency connector 1 , a structural fixing board 2 , a printed board under test 3 and a fastener 4 , The elastic needle radio frequency connector 1 is installed on the fixing board 2, and at the same time, the test printed board 3 and the elastic needle head radio frequency connector 1 are connected together by the fastener 4, and the test printed board 3 is fixed on the fixed board. 2 on the other side, so as to make reliable non-soldering contact with the corresponding tested ports 3-3 of the tested printed board 3 through a plurality of elastic needle connectors 1 at the same time, and connect the internal circuit of the tested printed board 3; The elastic needle radio frequency connector 1 includes a radio frequency connector joint 11, a radio frequency connector flange 12 and a radio frequency connector elastic inner conductor 13, and a radio frequency connector flange 12 is fixedly installed in the middle position of the radio frequency connector joint 11, and the radio frequency connection The connector flange 12 is used to connect with the structural fixing board 2, and the bottom of the RF connector joint 11 is connected with the RF connector elastic inner conductor 13, and the RF connector elastic inner conductor 13 is used to detect the printed board 3 under test. .

The structural fixing plate 2 includes a radio frequency connector mounting surface 21 and a printed board mounting surface 22. The radio frequency connector mounting surface 21 and the printed board mounting surface 22 are fixed and welded to form an integrated structure. There are several RF connector mounting holes 23 , the RF connector flange 12 is fitted on the RF connector mounting surface 21 through the RF connector mounting holes 23 , and a set of RF connector mounting holes 23 is provided with a radio frequency connection in the middle position. The position of the inner conductor via hole 24 in the RF connector corresponds to the position of the RF connector elastic inner conductor 13. The RF connector inner conductor via hole 24 passes through the RF connector inner conductor via hole 24 and protrudes out. The printed board mounting surface 2-2 of the structural fixing board; the printed board mounting surface 22 is provided with a number of printed board mounting holes 26, and the tested printed board 3 is provided with a number of tested printed boards corresponding to each other Fixing hole 35, the printed board 3 to be tested is installed on the structural fixing board 22 through the fastener 4, at this time the printed board fixing surface 32 is attached to the printed board mounting surface 22 of the structural fixing board, so that the printed board to be tested is The board to be tested port 3-3 and the RF connector elastic inner conductor 13 are in contact with each other. Through the structural size design, the elastic inner conductor 1-3 is under the action of elastic force and the hole of the printed board tested port 3-3 is a circle of metal Reliable contact and fit of chemical holes.

Among them, a plurality of welding avoidance grooves 25 are provided on the printed board mounting surface 22, and the welding avoidance grooves 25 and the printed board connector solder joints 34 correspond to each other, thereby ensuring that the printed board fixing surface 32 and the structural fixing board printed board are The mounting surfaces 22 fit completely together.

Preferably, the size and tolerance of the RF connector mounting hole 23 in the structural fixing plate 2 meet the installation and coordination requirements of the elastic needle RF connector 1, so as to ensure that the elastic needle RF connector flange 12 is fitted and fixed to the RF connector mounting surface 21 .

Preferably, the size of the inner conductor 13 of the RF connector in the elastic needle RF connector 1, the distance between the RF connector mounting surface 21 and the printed board mounting surface 22 in the structural fixing board 2, the size of the The dimensions of the test port 33 , the dimensions and tolerances of the three meet the requirements of reliable contact between the elastic inner conductor 13 of the RF connector and the metallized orifice of the port 33 to be tested on the printed board after installation.

Preferably, the number of the elastic needle radio frequency connectors 1 is the same as the number of the ports 33 to be tested on the printed board under test.

According to the above-mentioned preferred embodiment provided by the present invention, a non-soldering type rapid test mechanism for printed boards, the specific operation steps are as follows:

Step 1: The elastic needle RF connector 1 is installed and fixed on the corresponding position of the structural fixing plate 2 by screws, so as to ensure that the elastic needle RF connector 1 is fixed reliably, and the installation surface of the elastic needle RF connector 1 is fitted with the RF connector installation surface 21. Then, the printed board 3 to be tested is fixed on the mounting surface of the printed board with screws. At this time, the needle of the RF connector is attached to the metallized via hole of the tested port of the printed board, and the elastic inner conductor 13 of the RF connector is connected to the printed board. The internal circuit of the board is contacted and turned on;

Step 2: At this point, the construction of the test mechanism is completed, the RF connector joint 11 is connected to the tested printed board connector 31, and the load, RF cable, etc. can be installed on the RF connector joint 11 and the tested printed board connector 31, etc. Cooperate with test instruments to conduct electrical performance tests such as circuit on-off, standing wave test, etc.;

Step 3: After the test, remove the printed board 3 to be tested from the structural fixing board 2, the printed board 3 to be tested is in good shape, the metallized hole to be tested is not damaged, and the elastic needle RF connector 1 is installed. The structural fixing plate 2 can be reused to perform electrical performance tests on other printed boards 3 to be tested.

Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, it is still possible to modify the technical solutions described in the foregoing embodiments, or to perform equivalent replacements for some of the technical features. Within the spirit and principle of the present invention, any modifications, equivalent replacements, improvements, etc. made should be included in the protection scope of the present invention, and the content not described in detail in this specification belongs to the knowledge of those skilled in the art of existing technology.

Claims (8)

1. A non-welding type quick test mechanism for a printed board, comprising an elastic needle radio frequency connector (1), a structural fixing plate (2), a printed board to be tested (3), and a fastener (4), characterized in that : the elastic needle radio frequency connector (1) is mounted on the fixing plate (2), and at the same time, the tested printed board (3) and the elastic needle radio frequency connector (1) are connected together by the fastener (4), And the test printed board (3) is fixed on the other side of the fixing plate (2); the elastic needle radio frequency connector (1) comprises a radio frequency connector joint (11), a radio frequency connector flange (12) and The RF connector elastic inner conductor (13) is fixedly installed with the RF connector flange (12) at the middle position of the RF connector joint (11), and the RF connector elastic inner conductor (11) is connected to the bottom of the RF connector joint (11). conductor (13). 2. A non-soldering type quick test mechanism for printed boards according to claim 1, characterized in that: the structural fixing plate (2) comprises a radio frequency connector mounting surface (21) and a printed board mounting surface (22) ), the radio frequency connector mounting surface (21) and the printed board mounting surface (22) are fixed and welded into an integrated structure, and at the same time, the structural fixing plate (2) is provided with a number of radio frequency connector mounting holes (23), the radio frequency connector method The flange (12) is fitted and installed on the RF connector installation surface (21) through the RF connector installation hole (23), and at the same time a set of RF connector installation holes (23) are provided with a via hole in the inner conductor of the RF connector at the middle position (24), the position of the RF connector inner conductor via hole (24) corresponds to the position of the RF connector elastic inner conductor (13), and the RF connector elastic inner conductor (13) passes through the RF connector inner conductor via hole ( 24), protruding from the mounting surface (22) of the printed board of the structural fixing board. 3. A non-soldering type quick test mechanism for printed boards according to claim 2, characterized in that: said printed board mounting surface (22) is provided with a plurality of printed board mounting holes (26), which are simultaneously The test printed board (3) is provided with a plurality of mutually corresponding test printed board fixing holes (35), and the tested printed board (3) is mounted on the structural fixing plate (22) by the fastener (4), At this time, the printed board fixing surface (32) is attached to the printed board mounting surface (22) of the structural fixing board. 4. The non-welding type quick test mechanism for a printed board according to claim 3, wherein the printed board mounting surface (22) is provided with a plurality of welding avoidance grooves (25), and the welding avoidance grooves ( 25) and the solder joints (34) of the printed board connector correspond to each other. 5. A non-soldering type rapid test mechanism for printed boards according to claim 3 or 4, characterized in that: the size and tolerance of the RF connector mounting hole (23) in the structural fixing plate (2) satisfy the elastic needle head The RF connector (1) needs to be installed and matched. 6. A non-soldering type rapid test mechanism for printed boards according to claim 5, characterized in that: the size of the inner conductor (13) of the RF connector in the elastic needle RF connector (1), the size of the inner conductor (13) of the RF connector, the structural fixing plate ( 2) The distance between the mounting surface of the RF connector (21) and the mounting surface of the printed board (22), the size of the port to be tested (33) in the printed board (3) under test, and the dimensions and tolerances of the three meet the requirements of the RF after installation. Requirements for reliable contact between the elastic inner conductor (13) of the connector and the metallized orifice of the port to be tested (33) of the printed board under test. 7. A non-soldering type rapid test mechanism for printed boards according to claim 1 or 6, characterized in that: the number of the elastic needle radio frequency connectors (1) is the same as the number of the tested printed board ports (33) to be tested The number is the same. 8. The non-soldering type rapid test mechanism for printed boards according to claim 6, wherein the specific operation steps of the non-soldering type rapid test mechanism for printed boards are as follows: Step 1: The elastic needle radio frequency connector (1) is fixed on the corresponding position of the structural fixing plate (2) by screws, so as to ensure that the elastic needle radio frequency connector (1) is fixed reliably, and the installation surface of the elastic needle radio frequency connector (1) is connected with the radio frequency The connector mounting surface (21) is attached, and then the tested printed board (3) is installed and fixed on the printed board mounting surface with screws. At this time, the RF connector needle and the metallized via hole of the tested port of the printed board are pasted. together, the elastic inner conductor (13) of the radio frequency connector is in contact with the internal circuit of the printed board and conducts; Step 2: At this point, the construction of the test mechanism is completed, the RF connector joint (11) is connected with the tested printed board connector (31), and the RF connector joint (11) and the tested printed board connector (31) can be installed Load, RF cable and other tests, cooperate with test instruments to conduct electrical performance tests such as circuit on-off, standing wave test; Step 3: After the test is completed, the tested printed board (3) is removed from the structural fixing plate (2), the tested printed board (3) is in good shape, the tested metallized hole is not damaged, and it is equipped with elastic The structural fixing board (2) of the pinhead radio frequency connector (1) can be reused, and the electrical performance test of other printed boards (3) to be tested can be performed.

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