Structure for preventing rotation of inner and outer conductors after wave-soldering

Abstract

This utility model discloses a structure to prevent the rotation of inner and outer conductors after wave soldering, belonging to the field of electronic assembly. It includes an outer conductor, an outer insulator fixedly connected to its inner side, a limit strip fixedly connected to its inner side, a wedge ring slidably connected to the limit strip, a connecting rod fixedly connected to the side of the wedge ring, a connecting rod rotatably connected to one end of the connecting rod, an inner insulator rotatably connected to the connecting rod via an inner fixed post, a limit block fixedly connected to the outer side of the inner insulator, an inner conductor fixedly connected to its inner side, a coil fixedly connected to one end of the inner conductor, and a six-pointed star fixing ring fixedly connected to the outer side of the coil. This utility model, through a segmented insulator design and the inclusion of connecting rod structures in between, effectively alleviates the stress concentration problem caused by the difference in thermal expansion coefficients of different materials during wave soldering of RF coaxial connectors.

Description

Technical Field

[0001] This utility model relates to the field of electronic assembly technology, and in particular to a structure for preventing the inner and outer conductors from rotating after wave soldering. Background Technology

[0002] RF coaxial connectors are used to transmit high-frequency signals. Their core requirements are characteristic impedance matching (usually 50Ω or 75Ω), low signal loss, and stable shielding performance. However, any improper installation may introduce impedance changes, causing signal reflection and degrading performance.

[0003] Wave soldering is a traditional large-scale PCB soldering process that completes the soldering of all through-hole components and bottom circuitry in one go by bringing the bottom of the PCB board with inserted components into contact with the wave crest of molten solder.

[0004] Wave soldering technology for RF coaxial connectors specifically refers to the process of soldering through-hole mounting type RF coaxial connectors onto printed circuit boards (PCBs) using wave soldering equipment. This achieves a reliable and efficient electrical and mechanical connection between the connector's metal pins (center pin and external ground pin) and the metal-plated through-holes on the PCB. Currently, wave soldering of RF coaxial connectors has the following drawbacks:

[0005] 1. During the high-temperature stage of wave soldering, due to the significant difference in the coefficients of thermal expansion between the outer conductor, the insulator and the inner conductor, the thermal stress caused by the mismatch of the coefficients of thermal expansion may cause plastic deformation or even cracking of the insulator when the welding temperature reaches its peak.

[0006] 2. During wave soldering, the molten solder wave is in a dynamic flow state. Its hydrodynamic force will impact the components immersed in it. When the inner and outer conductors of the connector contact the solder wave at a non-perpendicular angle, the fluid impact will form a tangential component force on the cylindrical surface. This force may affect the positional stability or structural integrity of the component.

[0007] Therefore, a structure to prevent the inner and outer conductors from rotating after wave soldering is proposed. Utility Model Content

[0008] To achieve the above objectives, the present invention adopts the following technical solution:

[0009] A structure for preventing rotation of inner and outer conductors after wave soldering includes an outer conductor, an outer insulator fixedly connected to the inner side of the outer conductor, a limit strip fixedly connected to the inner side of the outer insulator, a wedge ring slidably connected to the limit strip, a connecting rod fixedly connected to the side of the wedge ring, a connecting rod rotatably connected to one end of the connecting rod, an inner insulator rotatably connected to the connecting rod via an inner fixed post, a limit block fixedly connected to the outer side of the inner insulator, an inner conductor fixedly connected to the inner side of the inner insulator, a coil fixedly connected to one end of the inner conductor, and a six-pointed star fixing ring fixedly connected to the outer side of the coil.

[0010] Preferably, two wedge rings are provided, and the two wedge rings are slidably connected to the side of the limiting strip and the limiting block through the grooves on both sides. Three limiting blocks and limiting strips are provided, and the three limiting blocks and limiting strips are evenly distributed in a circumferential array.

[0011] Preferably, there are six connecting rods, which are arranged in pairs. One end of each pair of connecting rods is rotatably connected to the side of a connecting rod, and the other end is fixedly connected to the side of a wedge ring.

[0012] Preferably, the inner insulator has a groove inside, and the hexagonal fixing ring protrusion is inserted into the groove by an interference fit.

[0013] Preferably, a threaded ring is fixedly connected to the side of the outer conductor, and a welding head is fixedly connected to one end of the outer conductor.

[0014] Preferably, three connecting rods are provided, and the three connecting rods are evenly distributed in a circumferential array on the side of the inner insulator.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] 1. By using a segmented insulator design and incorporating connecting rods in between, the stress concentration problem caused by the difference in thermal expansion coefficients of different materials during wave soldering of RF coaxial connectors is effectively alleviated.

[0017] 2. By designing a hexagonal star-shaped locking mechanism and combining it with multiple sets of circumferentially distributed limit blocks, the inner and outer conductors of the male connector are ensured to maintain reliable relative positional stability after the connector has undergone a 250℃ / min wave soldering process, without any rotation or offset. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of a structure for preventing rotation of inner and outer conductors after wave soldering, as proposed in this utility model.

[0019] Figure 2 This is an assembly diagram of a structure for preventing the inner and outer conductors from rotating after wave soldering, as proposed in this utility model.

[0020] Figure 3 This is an exploded view of the outer and inner insulators in a structure for preventing rotation of inner and outer conductors after wave soldering, as proposed in this utility model.

[0021] Figure 4 This is an exploded view of the inner insulator in a structure for preventing rotation of inner and outer conductors after wave soldering, as proposed in this utility model.

[0022] Figure 5 This is a schematic diagram of the connecting rod and link in a structure for preventing rotation of inner and outer conductors after wave soldering, as proposed in this utility model.

[0023] Figure 6 This is a cross-sectional view of the inner insulator in a structure for preventing rotation of inner and outer conductors after wave soldering, as proposed in this utility model.

[0024] In the diagram: 1. Outer conductor; 2. Outer insulator; 21. Limiting strip; 22. Inner insulator; 221. Limiting block; 3. Wedge ring; 31. Connecting rod; 32. Connecting rod; 33. Fixing post; 4. Inner conductor; 41. Conductor coil; 42. Hexagram fixing ring. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0026] Reference Figures 1-6 A structure for preventing rotation of inner and outer conductors after wave soldering includes an outer conductor 1, an outer insulator 2 fixedly connected to the inner side of the outer conductor 1, a limit strip 21 fixedly connected to the inner side of the outer insulator 2, a wedge ring 3 slidably connected to the limit strip 21, a connecting rod 31 fixedly connected to the side of the wedge ring 3, a connecting rod 32 rotatably connected to one end of the connecting rod 31, an inner insulator 22 rotatably connected to the connecting rod 32 via an inner fixed post 33, a limit block 221 fixedly connected to the outer side of the inner insulator 22, an inner conductor 4 fixedly connected to the inner side of the inner insulator 22, a coil 41 fixedly connected to one end of the inner conductor 4, and a hexagonal fixing ring 42 fixedly connected to the outer side of the coil 41.

[0027] Through the above technical solution, when the female head of the RF coaxial connector is soldered using the wave soldering process, due to the significant difference in the coefficients of thermal expansion between the outer conductor 1, the insulator and the inner conductor 4, the wedge ring 3 is subjected to pressure from the thermal expansion of the outer conductor 1 and the inner conductor 4 during soldering, causing the two wedge rings 3 to move towards the inner layer insulator 22 and the outer layer insulator 2. During the movement, the interaction of the three sets of connecting rods 31 and connecting rods 32 keeps the displacement distance of the two wedge rings 3 consistent and makes them move in a symmetrical state, which can effectively alleviate the stress concentration problem caused by the difference in the coefficients of thermal expansion of different materials during the wave soldering process of the RF coaxial connector;

[0028] After the device is soldered onto the PCB board, when the male connector is rotated to connect with the female connector, the inner insulator of the male connector continuously squeezes the outer wedge ring 3 during the connection process, causing the outer wedge ring 3 to move continuously. During the movement, the connecting rod 31 squeezes one side of the connecting rod 32, so that the connecting rod 32, which is rotatably connected to the inner insulator 22 through the fixed post 33, drives the wedge ring 3 on the other side to move in the opposite direction through the connecting rod 31 at the other end. This causes the inner insulator 22 to be squeezed by the wedge ring 3, making the inner groove of the inner insulator 22 fit with the contour of the hexagonal fixed ring 42, the coil 41, and the inner conductor 4. By designing a hexagonal star locking mechanism and combining it with multiple sets of circumferentially distributed limit blocks 221, it is ensured that after the connector is subjected to a 250℃ / min wave soldering process, the inner conductor 4 and the outer conductor 1 of the male connector still maintain reliable relative positional stability without rotation or offset.

[0029] Specifically, there are two wedge rings 3, which are slidably connected to the sides of the limiting strip 21 and the limiting block 221 through the grooves on both sides. There are three limiting blocks 221 and limiting strips 21, which are evenly distributed in a circumferential array. There are six connecting rods 31, which are arranged in pairs. One end of each pair of connecting rods 31 is rotatably connected to the side of the connecting rod 32, and the other end is fixedly connected to the side of the wedge ring 3. The inner layer insulator 22 has a groove inside, and the protrusion of the hexagonal fixing ring 42 is embedded in the groove with an interference fit. A threaded ring is fixedly connected to the side of the outer conductor 1, and a welding head is fixedly connected to one end of the outer conductor 1. There are three connecting rods 32, which are evenly distributed in a circumferential array on the side of the inner layer insulator 22.

[0030] Working principle:

[0031] When the female connector of the radio frequency coaxial connector is welded using the wave soldering process, the thermal expansion of the insulator, inner conductor 4 and outer conductor 1 compresses the wedge ring 3, causing the two wedge rings 3 to move towards the inner insulator 22 and the outer insulator 2. During the movement, the interaction of the three sets of connecting rods 31 and connecting rods 32 keeps the displacement distance of the two wedge rings 3 consistent and the movement is symmetrical, which can effectively alleviate the stress concentration problem caused by the difference in thermal expansion coefficient of different materials in the wave soldering process of the radio frequency coaxial connector.

[0032] Based on the above, when the device is soldered onto the PCB board and the male connector is rotated to connect with the female connector, the insulator inside the male connector will continuously squeeze the outer wedge ring 3 during the connection process, causing the outer wedge ring 3 to move inward continuously. During the movement, the connecting rod 31 squeezes one side of the connecting rod 32, causing the connecting rod 32, which is rotatably connected to the inner insulator 22 through the fixed post 33, to drive the wedge ring 3 on the other side to move in the opposite direction through the connecting rod 31 at the other end. This causes the inner insulator 22 to be squeezed by the wedge ring 3, making the inner groove of the inner insulator 22 fit with the contour of the hexagonal fixed ring 42, the coil 41, and the inner conductor 4. By designing a hexagonal star locking mechanism and combining it with multiple sets of circumferentially distributed limiting blocks 221, it is ensured that after the connector undergoes a 250℃ / min wave soldering process, the inner conductor 4 and the outer conductor 1 of the male connector still maintain reliable relative positional stability without rotation or offset.

[0033] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A structure for preventing rotation of inner and outer conductors after wave soldering, comprising an outer conductor (1), characterized in that, An outer insulator (2) is fixedly connected to the inner side of the outer conductor (1). A limiting strip (21) is fixedly connected to the inner side of the outer insulator (2). A wedge ring (3) is slidably connected to the limiting strip (21). A connecting rod (31) is fixedly connected to the side of the wedge ring (3). A connecting rod (32) is rotatably connected to one end of the connecting rod (31). An inner insulator (22) is connected to the connecting rod (32) through an inner fixed post (33). A limiting block (221) is fixedly connected to the outer side of the inner insulator (22). An inner conductor (4) is fixedly connected to the inner side of the inner insulator (22). A coil (41) is fixedly connected to one end of the inner conductor (4). A six-pointed star fixing ring (42) is fixedly connected to the outer side of the coil (41).

2. The structure for preventing rotation of inner and outer conductors after wave soldering according to claim 1, characterized in that, Two wedge rings (3) are provided. The two wedge rings (3) are slidably connected to the side of the limiting strip (21) and the limiting block (221) through the grooves at the inner and outer edges. Three limiting blocks (221) and limiting strips (21) are provided. The three limiting blocks (221) and limiting strips (21) are evenly distributed in a circumferential array.

3. The structure for preventing rotation of inner and outer conductors after wave soldering according to claim 1, characterized in that, There are six connecting rods (31), and the six connecting rods (31) are arranged in pairs. One end of each pair of connecting rods (31) is rotatably connected to the side of the connecting rod (32), and the other end is fixedly connected to the side of the wedge ring (3).

4. The structure for preventing rotation of inner and outer conductors after wave soldering according to claim 1, characterized in that, The inner insulator (22) has a groove inside, and the protrusion of the hexagonal fixing ring (42) is embedded in the groove by an interference fit.

5. The structure for preventing rotation of inner and outer conductors after wave soldering according to claim 1, characterized in that, The outer conductor (1) is fixedly connected to a threaded ring on its side, and a welding head is fixedly connected to one end of the outer conductor (1).

6. The structure for preventing rotation of inner and outer conductors after wave soldering according to claim 1, characterized in that, There are three connecting rods (32), which are evenly distributed in a circular array on the side of the inner insulator (22).

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