Highly reliable foreign matter intrusion prevention RF connector

Abstract

The utility model discloses a high reliability prevents the RF connector of foreign matter invasion, it includes: upper die module, lower die module and by upper die module with lower die module upper and lower enclosure formed working cavity, upper die module includes first plastic member, with first plastic member embedding forming as integrated structure static terminal and iron shell subassembly, lower die module includes second plastic member and the dynamic terminal of assembling on second plastic member, the plug interface of vertical intercommunication working cavity is formed in first plastic member, and the plug interface is aligned dynamic terminal's main body area, the bottom of first plastic member is the closed structure design, constitutes the lower enclosure of working cavity closed type and prevents. The utility model can effectively prevent foreign matter invasion product inside, and the contact reliability and durability between dynamic terminal and static terminal are improved significantly.

Description

Technical Field

[0001] This utility model relates to the field of radio frequency connector technology, and in particular to a highly reliable RF connector that prevents foreign object intrusion. Background Technology

[0002] Mini RF connectors are key components in modern communication equipment, used to switch radio frequency signal paths. Currently, the third-generation mini RF connectors commonly used in the industry are prone to excessive solder residue during the end-customer SMT assembly process due to variations in solder paste usage or process parameters. The rosin and other fluxing substances may vaporize or flow under the high temperatures of reflow soldering and penetrate the connector's internal cavity.

[0003] This intrusion can cause malfunctions between the core components of the connector—the moving and stationary terminals: either the terminals cannot disconnect properly (normally closed) due to residue adhesion, or the disconnection distance is insufficient due to contamination. When the product is used in conjunction with a test male connector, it can lead to excessive contact resistance, signal attenuation, or even complete failure to transmit RF signals, severely impacting product reliability and yield.

[0004] Patent document CN114389075A discloses an RF coaxial connector and its manufacturing process. This solution includes a plastic body, moving and stationary terminals, and a metal shell assembly. The moving terminals feature auxiliary spring arms and connecting protrusions, but their contact pads have a single contact wire structure, which may lead to unstable contact, large resistance fluctuations, and susceptibility to contamination. Furthermore, the metal shell assembly is directly mounted on the lower plastic part, and the stationary terminals are embedded within the lower plastic part. Although they are engaged with the circumferential groove by a second clamping piece, the bottom of the plastic body has a hollow design, failing to form a completely sealed cavity, posing a risk of foreign objects intruding through the joint between the metal shell and the plastic body.

[0005] Therefore, it is necessary to design a new utility model to solve the above-mentioned technical problems. Utility Model Content

[0006] The main purpose of this invention is to provide a highly reliable RF connector that prevents foreign objects from entering the product, and significantly improves the contact reliability and durability between the moving and stationary terminals.

[0007] This utility model achieves the above objective through the following technical solution: a highly reliable RF connector that prevents foreign object intrusion, comprising: an upper module, a lower module, and a working cavity formed by the upper module and the lower module being enclosed from top to bottom; The upper module includes a first plastic part, a stationary terminal and an iron shell assembly that are embedded and molded as an integral structure with the first plastic part; The lower module includes a second plastic part and a moving terminal assembled on the second plastic part; The first plastic part has a vertically connected insertion interface that communicates with the working cavity, and the insertion interface is aligned with the main body area of ​​the moving terminal; the bottom of the first plastic part has a closed structure design, forming a closed lower enclosure for the working cavity.

[0008] Furthermore, the stationary terminal includes a first contact piece, a bent connecting portion, and a first plate surface that are sequentially adjacent along the X direction, and the bent connecting portion is embedded inside the first plastic part.

[0009] Furthermore, a pair of first cantilever arms are provided on both sides of the first contact piece, which are embedded inside the first plastic part and used to increase the installation strength; the end of the first plate extends out of the first plastic part to form a first weld foot.

[0010] Furthermore, the moving terminal includes a second contact piece that is sequentially adjacent to each other in the opposite direction along the X direction, a moving terminal body that contacts the test male, a second plate surface, and a first clamping piece that is bent downwards to fasten the second plastic part; the end of the first clamping piece extends to the bottom of the second plastic part to form a second welding foot.

[0011] Furthermore, the first contact piece of the stationary terminal is exposed on the top wall surface of the working cavity; the second contact piece includes a pair of abutting portions that abut against the lower surface of the first contact piece, and the abutting portions are in line contact with the first contact piece.

[0012] Furthermore, the dimension of the second plate surface along the Y direction is larger than that of the second contact piece, and a corresponding limiting slot is provided on the second plastic part to restrict the vertical freedom of the second plate surface.

[0013] Furthermore, a pair of second cantilever arms are provided on both sides of the moving terminal body to provide the second contact piece with an upward rebound force; a support platform is correspondingly provided on the second plastic part to cooperate with the second cantilever arms and to support the second cantilever arms.

[0014] Furthermore, a second limiting protrusion formed by a puncture process is provided on the second plate surface, and a limiting slot is correspondingly provided in the limiting slot to cooperate with the second limiting protrusion and to prevent the moving terminal from reversing out of the limiting slot.

[0015] Furthermore, the metal shell assembly covers the outer peripheral surface of the first plastic part and includes a pair of downwardly bent second clamping tabs for fastening the lower module.

[0016] Furthermore, it also includes a connecting block embedded inside the second plastic part, which facilitates continuous strip production, and the lower module is connected to the continuous strip through the connecting block.

[0017] Compared with existing technologies, the advantages of this utility model's highly reliable RF connector with foreign object intrusion prevention are as follows: (1) High reliability: By combining double contact wires and wire surface contact, contaminants on the contact surface are effectively removed, ensuring that the terminals can maintain a stable and low-resistance electrical connection after frequent switching, and the signal transmission performance is excellent.

[0018] (2) Excellent sealing performance: The one-piece injection molded working cavity structure provides the highest level of protection, completely solving the problem of product failure caused by the intrusion of welding residues, and greatly improving product yield and service life. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the exploded structure of this embodiment; Figure 2 This is a cross-sectional structural diagram of this embodiment; Figure 3 This is a three-dimensional structural diagram of the second plastic part in this embodiment; Figure 4 This is a three-dimensional structural diagram of the stationary terminal in the embodiment; Figure 5 This is a three-dimensional structural diagram of the moving terminal in this embodiment; Figure 6 This is a three-dimensional structural diagram of the iron shell assembly and the first plastic part in this embodiment; The diagram is marked as follows: 100-High reliability RF connector protected against foreign object intrusion; 1-Upper module, 11-First plastic part, 111-Insert interface, 12-Stationary terminal, 121-First contact piece, 122-Bent connection part, 123-First plate surface, 1231-First welding foot, 124-First cantilever arm, 13-Iron shell assembly, 131-Second clamping piece; 2-Lower module, 21-Second plastic part, 211-Working groove, 212-Limiting protrusion, 213-Support platform, 214-Limiting slot, 215-Limiting slot, 22-Moving terminal, 221-Second contact piece, 2211-Abutting part, 222-Moving terminal body, 223-Second plate, 224-First clamping piece, 2241-Second welding foot, 225-Second cantilever arm, 23-Connecting block; 3-Working cavity. Detailed Implementation

[0020] The present invention will be further described in detail below with reference to specific embodiments.

[0021] Example: Please refer to Figures 1-6This embodiment provides a highly reliable RF connector 100 resistant to foreign object intrusion, which includes an upper module 1, a lower module 2, and a working cavity 3 formed by the upper module 1 and the lower module 2. The upper module 1 includes a first plastic part 11 and a stationary terminal 12 and a metal shell assembly 13 embedded within the first plastic part 11. The lower module 2 includes a second plastic part 21, a moving terminal 22 inserted into the second plastic part 21, and a connecting block 23 embedded within the second plastic part 21 for connecting a material strip. The second plastic part 21 has a working groove 211 for accommodating the stationary terminal 12 and the moving terminal 22, which are installed along the X direction.

[0022] In existing technologies, the metal shell assembly 13 and the first plastic part 11 are typically integrally molded as external shielding and structural reinforcement components, and installed above the stationary terminal 12 and the moving terminal 22. The stationary terminal 12 and the moving terminal 22 are both located within the working groove 211 of the second plastic part 21, or are fixed inside the second plastic part 21 by embedding. However, this structural design cannot completely ensure a gapless installation between the integral structure formed by the metal shell assembly 13 and the first plastic part 11 and the moving terminal 22 and the stationary terminal 12, and the overall installation strength is insufficient, requiring improved reliability. Therefore, in this embodiment, the stationary terminal 12 and the metal shell assembly 13 are jointly embedded in the first plastic part 11, forming an integral upper module 1 that combines the stationary terminal 12, the metal shell assembly 13, and the first plastic part 11. This structure significantly enhances the installation strength between components and further ensures that the interior of the working cavity 3 is not invaded by foreign objects.

[0023] The second plastic part 21 is directly molded onto the lower surface of the upper module 1, and its upper surface is provided with multiple first limiting protrusions 212 to limit the horizontal displacement of the upper module 1. In the prior art, the second plastic part 21 usually adopts a bottom hollow structure design, which can easily allow foreign objects or dust to enter the working cavity 3. Therefore, in this embodiment, the bottom of the second plastic part 21 is designed as a closed structure to completely cover the lower enclosure of the working cavity 3, so that both the stationary terminal 12 and the moving terminal 22 are within the working cavity 3 completely closed by the lower enclosure, thereby significantly reducing the risk of poor contact caused by foreign objects intruding into the first contact piece.

[0024] The stationary terminal 12 is an integral structure, designed for both reliable fixation and automated production. Along the X-direction, the stationary terminal 12 is sequentially provided with a first contact piece 121, a bent connecting portion 122, and a first plate surface 123. The first contact piece 121 extends into the working cavity 3 and abuts against the moving terminal 22; the bent connecting portion 122 is bent downwards and embedded in the first plastic part 11, lowering the height of the first plate surface 123, thus achieving initial fixation. To further enhance installation strength, first cantilever arms 124 are provided on both sides of the first contact piece 121, with their main bodies embedded in the first plastic part 11 and their ends exposed and flush with the first contact piece 121. Regarding production and connection, the first plate surface 123 or the first cantilever arm 124 can serve as a connection point for the material strip; during assembly, the end of the first plate surface 123 extends beyond the first plastic part 11, forming a first weld foot 1231.

[0025] The moving terminal 22 is provided with a second contact piece 221, a moving terminal body 222, a second plate surface 223, and a first clamping piece 224 in reverse order along the X direction. The second contact piece 221 extends cantilevered into the working cavity 3, with a pair of second cantilever arms 225 on both sides. The first clamping piece 224 is bent downwards to enhance the installation strength between the moving terminal 22 and the second plastic part 21. When the test male (not shown in the figure) is inserted, it contacts the moving terminal body 222. To ensure that the moving terminal 22 has downward pressure space in the working groove 211 of the second plastic part 21 and can promptly rebound to its original position after being pressed, a support platform 213 is provided in the working groove 211 corresponding to the position of the second cantilever arm 225. The height of the support platform 213 is higher than the bottom surface of the working groove 211. The first clamping piece 224 extends out of the second plastic part 21 to form a second solder foot 2241, achieving electrical connection.

[0026] After the other components are installed, the moving terminal 22 is inserted into the working groove 211 along the X direction. To prevent it from retracting in the reverse X direction after insertion, second limiting protrusions 2231, made by a puncture process, are provided on both sides of the second plate surface 223. A corresponding limiting slot 214 is provided on the second plastic part 21 to cooperate with it, thereby achieving reverse limiting of the moving terminal 22 in the X direction. To restrict the vertical movement of the moving terminal 22, the width of the second plate surface 223 along the Y direction is greater than that of the second contact piece 221. At the same time, a limiting slot 215 is provided on the second plastic part 21 at the corresponding position to prevent the moving terminal 22 from wobbling up and down in the working groove 211. The limiting slot 214 is disposed in the limiting slot 215.

[0027] The second contact piece 221 curves upward and abuts against the lower surface of the first contact piece 121 of the stationary terminal 12 to achieve conductivity. Specifically, the second contact piece 221 has a double contact line structure, and both of its abutting portions 2211 are in line contact with the lower surface of the first contact piece 121, such as... Figure 2As shown in Figure A. While surface-to-surface contact might offer a larger contact area, it's difficult to guarantee absolute flatness and cleanliness. Any minute unevenness or dirt can create air gaps, affecting the overall structural integrity. Point-to-point or point-to-surface contact, on the other hand, results in too few contact points, leading to high and unstable resistance, high current density, and heat generation, which also negatively impacts structural durability. Therefore, line-to-surface contact maintains extremely low and stable contact resistance while achieving excellent mechanical durability and resistance to environmental interference, ensuring reliable long-term transmission of radio frequency signals under complex operating conditions.

[0028] In this embodiment, when the moving terminal 22 is pressed down, the structure slides along the X direction. Therefore, the two abutting portions 2211 can jointly scrape away foreign matter from the lower surface of the stationary terminal 12 within this stroke. In comparison, although point contact can slide, line contact has a better scraping effect within the same distance, and can better ensure the cleanliness and stability of the contact interface.

[0029] The first plastic part 11 is provided with a vertical insertion interface 111 for inserting a test male connector. The iron shell assembly 13 covers the outer periphery of the first plastic part 11 and uses a pair of downwardly bent second clamping pieces 131 to fasten the second plastic part 21, thereby achieving reliable locking between the upper module 1 and the lower module 2 and improving the overall connection strength.

[0030] The working principle of this utility model is as follows: When the external test male connector (not shown in the figure) is not inserted, the moving terminal 22 and the stationary terminal 12 maintain normal contact within the working cavity 3, and the signal is conducted. When the test male connector 200 is inserted and presses downward on the moving terminal 22, the moving terminal 22 undergoes elastic deformation, and its contact part 2211 disconnects from the stationary terminal 12, switching the signal path. Since the entire operation takes place within the completely sealed working cavity 3 under the lower enclosure, external contaminants cannot intrude. Simultaneously, the design of the contact part 2211 generates a slight scraping action with each contact and disconnection, effectively removing any minute contaminants from the contact surface and ensuring reliable contact over long-term use.

[0031] The above descriptions are merely some embodiments of this utility model. For those skilled in the art, various modifications and improvements can be made without departing from the concept of this utility model, and all such modifications and improvements fall within the protection scope of this utility model.

Claims

1. A highly reliable RF connector resistant to foreign object intrusion, comprising: An upper module, a lower module, and a working cavity formed by the upper and lower modules enclosing each other; The upper module includes a first plastic part, a stationary terminal and an iron shell assembly that are embedded and molded as an integral structure with the first plastic part; The lower module includes a second plastic part and a moving terminal assembled on the second plastic part; The first plastic part has a vertically connected insertion interface that communicates with the working cavity, and the insertion interface is aligned with the main body area of ​​the moving terminal; the bottom of the first plastic part has a closed structure design, forming a closed lower enclosure for the working cavity.

2. The high-reliability RF connector against foreign object intrusion according to claim 1, characterized in that: The stationary terminal includes a first contact piece, a bent connecting portion and a first plate surface that are sequentially adjacent along the X direction, and the bent connecting portion is embedded inside the first plastic part.

3. The high-reliability RF connector against foreign object intrusion according to claim 2, characterized in that: The first contact piece has a pair of first cantilever arms embedded inside the first plastic part on both sides to increase the installation strength; the end of the first plate extends out of the first plastic part to form a first weld foot.

4. The high-reliability RF connector against foreign object intrusion according to claim 2, characterized in that: The moving terminal includes a second contact piece that is sequentially adjacent to each other in the opposite direction along the X direction, a moving terminal body that contacts the test male, a second plate surface, and a first clamping piece that is bent downward to fasten the second plastic part; the end of the first clamping piece extends to the bottom of the second plastic part to form a second welding foot.

5. The high-reliability RF connector against foreign object intrusion according to claim 4, characterized in that: The first contact piece of the stationary terminal is exposed on the top wall surface of the working cavity; the second contact piece includes a pair of abutting portions that abut against the lower surface of the first contact piece, and the abutting portions are in line contact with the first contact piece.

6. The high-reliability RF connector against foreign object intrusion according to claim 4, characterized in that: The second plate has a larger dimension along the Y direction than the second contact piece, and a corresponding limiting slot is provided on the second plastic part to restrict the vertical freedom of the second plate.

7. The high-reliability RF connector against foreign object intrusion according to claim 4, characterized in that: The moving terminal body has a pair of second cantilever arms on both sides for providing the second contact piece with an upward rebound force; the second plastic part has a support platform that cooperates with the second cantilever arms and is used to support the second cantilever arms.

8. The high-reliability RF connector against foreign object intrusion according to claim 6, characterized in that: The second plate surface is provided with a second limiting protrusion formed by a piercing process, and the limiting slot is provided with a corresponding limiting groove that cooperates with the second limiting protrusion and is used to prevent the moving terminal from reversing and disengaging from the limiting slot.

9. The high-reliability RF connector against foreign object intrusion according to claim 1, characterized in that: The metal shell assembly covers the outer periphery of the first plastic part and includes a pair of downwardly bent second clamping pieces for fastening the lower module.

10. The high-reliability RF connector against foreign object intrusion according to claim 1, characterized in that: It also includes a connecting block embedded inside the second plastic part to facilitate continuous strip production, and the lower module is connected to the continuous strip through the connecting block.

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