Inter-board welding-free radio frequency connector structure

Abstract

The utility model discloses an inter-board welding-free radio frequency connector structure, which is characterized in that fuzz buttons are arranged in an inner conductor of a connector to serve as elastic contact pieces, so that the end face contact of the connector is of a welding-free structure, and signal conduction between the connector and a printed board is realized through external force pressing. The grounding ring is arranged between the outer conductor and the shell, and compared with a traditional mode that the shell is provided with an elastic contact piece to achieve grounding of the outer conductor, the structure saves cost, reduces assembling difficulty, and improves shielding effect at the same time. The connector structure can meet the requirements of miniaturization, low height and no welding of the whole machine, and is accurate in insertion, simple in processing and assembling, and convenient in operation.

Description

Technical Field

[0001] The present invention relates to the field of connector technology, specifically to a solderless inter-board radio frequency connector structure. This structure is suitable for interconnecting electrical circuit systems requiring solderless, high density, and low profile. It can be used in aerospace, aviation, drones, satellites, missiles, phased array radar arrays, and other fields. Background Art

[0002] With the advancement of information technology, the performance requirements for signal transmission in electronic equipment have significantly increased. Electronic equipment is moving toward miniaturization, lightweighting, high integration, multi-functioning, and high reliability. Traditionally, when RF signal conversion is required between printed circuit boards, an RF interface is typically soldered to each upper and lower printed circuit board, with a floating adapter interposed between them to transmit the signal between the boards. This method of connection, if a printed circuit board has multiple channels, can lead to excessive insertion force due to excessive connectors, potentially damaging the printed circuit board. Furthermore, the cumulative tolerances of the various mounting holes can cause some connectors to be misaligned, leading to damage to the connector or adapter. Summary of the Invention

[0003] In order to meet the interconnection needs of electrical circuit systems with solderless, high-density and low-profile requirements, the purpose of this utility model is to provide an inter-board solderless RF connector structure, which greatly improves the problem of multi-core products being difficult to plug and unplug due to the accumulation of installation hole precision errors.

[0004] In order to achieve the above-mentioned purpose, the present invention adopts the following technical solutions.

[0005] A solderless inter-board RF connector structure includes a housing 3, a nut 6 sleeved on the housing 3, an outer conductor 4 mounted in the housing 3, a grounding ring 5 sleeved between the outer conductor 4 and the housing 3, an insulating medium 2 mounted in the outer conductor 4, an inner conductor 1 mounted in the insulating medium 2, and a hair button 7 fixed in the inner conductor 1. The hair button 7 is a resilient contact element that protrudes above the connector end face. When the connector is positioned and locked with the printed circuit board, the hair button 7 elastically deforms, generating a positive pressure force on the solder pad, thereby transmitting RF signals or current.

[0006] The wool button 7 is made of a highly elastic and conductive beryllium bronze through heat treatment, and has the advantages of small size and quick solder-free connection; after the wool button 7 is installed in the inner conductor 1, it is fixed by spot riveting, which can reduce other fixed parts at the front end to reduce the height of the product; the wool button 7 is 0.4 mm higher than the end face of the connector, and after compression, it can ensure that the elastic end of the product is in effective and reliable contact.

[0007] The opening of the inner conductor 1 is provided with an inner conductor chamfer 1-1 to facilitate insertion of the hair button 7 into the inner conductor 1. The outer portion of the inner conductor 1 is provided with an inner conductor step 1-2 and barbs 1-3. The inner conductor 1 is inserted into the insulating medium 2 and is limited by the inner conductor step 1-2 and is fixed in the insulating medium 2 by interference fit via the barbs 1-3. The inner conductor step 1-2 is provided to facilitate positional limitation between the inner conductor and the insulating medium 2, and the barbs 1-3 are provided for interference fit fixation with the insulating medium 2.

[0008] The inner conductor chamfer 1-1 is 30 degrees, which serves as a guide when the wool button 7 is installed, and the chamfer intersecting at 45 degrees can enhance the strength of the part mouth.

[0009] The lower end of the insulating medium 2 is provided with an insulating medium step 2-1 for assembly and positioning with the outer conductor 4, and the lower part of the upper end outer circle is provided with an insulating medium chamfer 2-2 for facilitating alignment and positioning during the assembly process.

[0010] The outer conductor 4 is provided with a small outer diameter 4-2 and an outer conductor chamfer 4-3 for facilitating the outer conductor 4 to be installed in the outer shell 3. The small outer diameter 4-2 and the outer conductor chamfer 4-3 facilitate the outer conductor 4 to be sleeved on the grounding ring 5 and to play a guiding role when being installed in the outer shell 3; an outer conductor step 4-1 for fixing the grounding ring 5 is provided at the upper end of the outer conductor 4, and the outer conductor step 4-1 is used to limit the position between the outer conductor 4 and the grounding ring 5; a grounding ring step 5-1 adapted to the outer conductor step 4-1 is provided inside the grounding ring 5 for easy installation and limitation, and bent elastic springs 5-2 are provided on both sides of the outer diameter for grounding due to elastic deformation force. The bent elastic springs 5-2 are used to apply external force to the outer conductor after assembly to achieve grounding and shielding.

[0011] The housing 3 is provided with an inner chamfer 3 - 1 and a limiting step 3 - 2 for facilitating the installation of the insulating medium 2 into the housing 3 and for limiting the position. The connector is fixed to the user panel by a nut 6 .

[0012] The connector of this utility model mainly realizes the circuit interconnection between devices. Its main working principle is that after the upper end surface of the connector contact is positioned and locked with the interconnected printed circuit board, the button contact produces elastic deformation, and at the same time generates a positive pressure force acting on the pad, thereby transmitting radio frequency signals or currents.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1) The button contact on the top of the connector is pressed together with the printed circuit board pad to achieve signal conduction, which is a new type of solderless RF structure. The solderless structure on the top of the connector solves the problem of damage to the printed circuit board caused by the insertion and removal force of the original inter-board soldered connector during insertion and removal.

[0015] 2) A grounding ring is used on the top of the connector to ground and shield the outer conductor of the product. It is a new type of solder-free structure and greatly reduces the product size.

[0016] In summary, the flexible, solderless structure for RF and ground signals can significantly alleviate the difficulty in plugging and unplugging multi-core products due to the accumulation of mounting hole precision errors. Furthermore, the connector of this utility model is small in size and offers reliable connections, effectively reducing product installation space and assembly difficulty while also improving shielding effectiveness. This connector structure meets the requirements for miniaturization, low profile, and solder-free design of the entire device, while also ensuring accurate insertion and removal, simple processing and assembly, and easy operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is the front view of the connector structure of the present invention.

[0018] Figure 2 This is a top view of the connector structure of the present invention.

[0019] Figure 3 This is an enlarged view of the inner conductor.

[0020] Figure 4 Schematic diagram of the inner conductor fixing structure.

[0021] Figure 5 Schematic diagram of the shell fixing structure.

[0022] Figure 6 This is an enlarged view of the grounding ring.

[0023] Figure 7 Schematic diagram of the connector fixing method. DETAILED DESCRIPTION

[0024] The present invention is described in further detail below with reference to the accompanying drawings:

[0025] The utility model discloses a solder-free radio frequency connector structure between boards. Figure 1 and Figure 2 As shown, it includes a wool button 7 fixed in the inner conductor 1, the inner conductor 1 installed in the insulating medium 2, the insulating medium 2 installed in the outer conductor 4, the outer conductor 4 installed in the outer shell 3, a grounding ring 5 sleeved between the outer conductor 4 and the outer shell 3, and a nut 6 sleeved on the outer shell 3.

[0026] The structure is completed in four steps: the first step is to embed the wool button 7 into the inner conductor 1 and fix it relatively by spot riveting; the second step is to fix the inner conductor assembly installed in the first step into the insulating medium 2 by interference fit to form an insulating medium assembly; the third step is to put the grounding ring 5 onto the outer conductor 4, and then interference fit it into the outer shell 3 to form a outer shell assembly; the fourth step is to interference fit the insulating medium assembly installed in the second step into the outer shell assembly installed in the third step.

[0027] like Figure 3 、 Figure 4 As shown, the inner conductor 1 has a 30° chamfer 1-1 at the front end of the inner hole to facilitate the insertion of the hair button 7 into the inner conductor 1. The inner conductor 1 has an inner conductor step 1-2 on its exterior to facilitate positioning with the insulating medium 2. The lower end of the inner conductor 1 has a barb 1-3 for interference fit with the insulating medium 2. The lower end of the insulating medium 2 has an insulating medium step 2-1 for assembly with the outer conductor 4. The upper end has an insulating medium chamfer 2-2 below the outer circle to facilitate alignment during assembly.

[0028] like Figure 5 As shown, the upper end of the outer conductor 4 is provided with an outer conductor step 4-1 for limiting the position with the grounding ring 5, and the lower end of the outer conductor 4 is provided with a small outer diameter 4-2 and an outer conductor chamfer 4-3, which facilitates the outer conductor 4 to be sleeved on the grounding ring 5 and to play a guiding role when being installed in the housing 3.

[0029] like Figure 6 As shown, a grounding ring step 5-1 adapted to the outer conductor step (4-1) is provided inside the grounding ring 5, so as to play a limiting role after assembly with the outer conductor 4. Bent elastic springs 5-2 are provided on both sides of the bottom of the grounding ring 5 to apply external force after assembly to play a grounding shielding role for the outer conductor.

[0030] like Figure 7 As shown, the shell 3 is provided with an inner chamfer 3-1 and an inner limit step 3-2 to facilitate the installation of the insulating medium 2 into the shell 3 and the limiting function; the shell 3 is provided with a symmetrical positioning flat 3-3 and an outer step 3-4. The symmetrical positioning flat 3-3 prevents the shell 3 from rotating relative to the user panel, and the outer step 3-4 limits the shell 3 in the user panel, and then the shell 3 is fixed to the user panel by a nut 6.

[0031] To address the high insertion and removal forces associated with soldering multi-channel RF connectors between boards, this utility model proposes a solderless RF connector structure. This structure employs a hair button (7) inserted into an inner conductor (1) to create elastic contact at one end of the RF connector. The upper end face of the connector contact is locked into position with the interconnected printed circuit board, causing elastic deformation at the elastic end. This generates a positive pressure force on the solder pad, thereby transmitting RF signals or current. Compared to traditional inter-board soldered structures, this design offers advantages such as ease of operation, rapid separation, and reduced insertion and removal forces.

Claims

1. A solderless radio frequency connector structure between boards, characterized by: The invention comprises a shell (3), a nut (6) sleeved on the shell (3), an outer conductor (4) installed in the shell (3), a grounding ring (5) sleeved between the outer conductor (4) and the shell (3), an insulating medium (2) installed in the outer conductor (4), an inner conductor (1) installed in the insulating medium (2), and a wool button (7) fixed in the inner conductor (1); the wool button (7) is an elastic contact part, which is higher than the end face of the connector. After the connector and the printed circuit board are positioned and locked, the wool button (7) is elastically deformed, and a positive pressure force is generated to act on the pad, thereby transmitting radio frequency signals or current.

2. The inter-board solderless RF connector structure according to claim 1, characterized in that: The wool button (7) is made of a high-elasticity and high-conductivity beryllium bronze through heat treatment. After the wool button (7) is installed in the inner conductor (1), it is fixed by spot riveting. The wool button (7) is 0.4 mm higher than the end face of the connector.

3. The inter-board solderless RF connector structure according to claim 1, characterized in that: The inner conductor (1) opening is provided with an inner conductor chamfer (1-1) for facilitating the insertion of the hair button (7) into the inner conductor (1); the outer portion of the inner conductor (1) is provided with an inner conductor step (1-2) and a barb (1-3); the inner conductor (1) is inserted into the insulating medium (2) and is limited by the inner conductor step (1-2) and is fixed in the insulating medium (2) by interference fit through the barb (1-3).

4. The inter-board solderless RF connector structure according to claim 3, characterized in that: The chamfer angle (1-1) of the inner conductor is 30°.

5. The inter-board solderless RF connector structure according to claim 1, characterized in that: The lower end of the insulating medium (2) is provided with an insulating medium step (2-1) for limiting assembly with the outer conductor (4), and an insulating medium chamfer (2-2) is provided below the outer circle of the upper end to facilitate alignment and positioning during the assembly process.

6. The inter-board solderless RF connector structure according to claim 1, characterized in that: The outer conductor (4) is provided with a small outer diameter (4-2) and an outer conductor chamfer (4-3) for facilitating the outer conductor (4) to be installed in the housing (3); an outer conductor step (4-1) for fixing the grounding ring (5) is provided at the upper end of the outer conductor (4); a grounding ring step (5-1) adapted to the outer conductor step (4-1) is provided inside the grounding ring (5) for facilitating installation and limiting; bent elastic springs (5-2) are provided on both sides of the outer diameter and have a grounding effect due to elastic deformation force.

7. The inter-board solderless RF connector structure according to claim 1, characterized in that: The housing (3) is provided with an inner chamfer (3-1) and a limiting step (3-2) for facilitating the insertion of the insulating medium (2) into the housing (3) and for limiting the position.

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