Inter-board radio frequency connector based on reed embedding structure

Abstract

The invention relates to an inter-board radio frequency connector based on a reed embedding structure. The inter-board radio frequency connector comprises an inner conductor, an insulator and a shell, the insulators are divided into two groups, the inner conductor is arranged between the two groups of insulators, and the shell is arranged at the upper ends of the two groups of insulators; the inner conductor comprises a first inner conductor and a second inner conductor; the first inner conductor and the second inner conductor are embedded between the two groups of insulators; the inner conductor and the shell are integrally formed in a stamping mode, the inner conductor is arranged on the inner side of the insulator in a mutually embedded mode, good electrical continuity and large adaptive axial tolerance are achieved, the cavity well conducts impedance matching on the transition section, production and processing are convenient, the production period is short, the structure is reliable, and transient breaking is not prone to occurring.

Description

Technical Field

[0001] The present invention relates to the technical field of radio frequency connection, and in particular to an inter-board radio frequency connector based on a spring-engaging structure. Background Art

[0002] In electronic equipment, there are often multiple printed circuit boards, some of which are installed vertically in layers. However, the vertically stacked printed circuit boards cannot avoid signal interconnection, and in this case, inter-board electrical connectors are often required. For radio frequency and microwave signals, inter-board radio frequency connectors are required.

[0003] The existing integrated inter-board RF connector includes at least 6 parts, namely, bullet, spring, needle, sleeve, insulator, and outer conductor. The bullet contacts the needle, and the spring is embedded between the needle and the inner conductor. The bullets at both ends contact the PCB boards at both ends at the same time, so as to meet the installation requirements of PCB boards with different spacings, thereby meeting the requirements of use.

[0004] However, the existing inter-board RF connectors have the following defects: 1. The internal conductor structure of the existing inter-board RF connector is complex, including at least 6 parts, and the cost is relatively high; 2. The internal conductor parts of the existing inter-board RF connector need to go through processes such as turning and milling, and the assembly process is also relatively complicated, and the production cycle is relatively long; 3. The existing inter-board RF connector is prone to momentary disconnection under tests such as mechanical vibration resistance and temperature shock resistance. Summary of the invention

[0005] The purpose of the present invention is to overcome the shortcomings of the prior art and propose an inter-board radio frequency connector based on a reed-engaged structure. The inner conductor and the outer shell are integrally formed by stamping, and the inner conductors are mutually embedded on the inner side of the insulator. It has good electrical continuity and can adapt to a larger axial tolerance. The cavity performs impedance matching on the transition section, is easy to produce and process, has a short production cycle, and has a reliable structure that is not prone to instantaneous disconnection.

[0006] In order to solve the problems in the above background technology, the present invention is implemented by the following technical solutions:

[0007] A board-to-board radio frequency connector based on a spring-engaged structure comprises an inner conductor, an insulator and an outer shell; the insulators are divided into two groups, the inner conductor is arranged between the two groups of insulators, and the outer shell is arranged on the upper ends of the two groups of insulators; the inner conductor comprises a first inner conductor and a second inner conductor, and the first inner conductor and the second inner conductor are arranged in an embedded manner between the two groups of insulators.

[0008] Preferably, the first inner conductor and the second inner conductor are both spring stamping one-piece molding structures, including a groove, a bending portion and a contact; the bending portions are provided at both upper and lower ends of the groove; the contact is provided at the upper end of the bending portion of the first inner conductor, and the contact is provided at the lower end of the bending portion of the second inner conductor; the groove and the bending portion of the first inner conductor and the groove and the bending portion of the second inner conductor are embedded between the two groups of insulators, and the contacts of the first inner conductor and the second inner conductor are located outside the upper and lower ends of the two groups of insulators.

[0009] Preferably, the bending portion includes a double-row bending portion arranged at one end of the inner conductor and a single-row bending portion arranged at the other end of the inner conductor; a convex clamping plate is provided at the end of the double-row bending portion, and the clamping plate is provided with the contact; a rectangular pressure plate is provided at the end of the single-row bending portion, and L-shaped clamping strips are provided on both sides of the rectangular pressure plate; the double-row bending portions and single-row bending portions corresponding to each other of the first inner conductor and the second inner conductor are interlocked, and are buckled together with the clamping plate through the corresponding grooves, the L-shaped clamping strips and the clamping plate.

[0010] Preferably, an upper placement groove and a lower placement groove for placing the bending portion are respectively provided at the upper end and the lower end of the middle position of the inner side of the two groups of insulators, and a fixing groove for installing the groove is provided between the upper placement groove and the lower placement groove.

[0011] Preferably, the two groups of insulators are both provided with pins and pin holes, and the pins and pin holes are located on both sides of the upper placement groove, the lower placement groove and the fixing groove, and the two groups of insulators are connected by the pins and the pin holes.

[0012] Preferably, the outer upper ends of the two groups of insulators are provided with steps that cooperate with the shell.

[0013] Preferably, the shell is a stamped integrally formed cylindrical hollow structure, an elastic flap is provided at the upper end of the shell, a barb and an installation flap are provided at the lower end of the shell, a limiting step is provided inside the shell, the shell is inserted into the upper ends of the two groups of insulators, is limited by the limiting step, and is fixed by the barb and the outer diameter interference fit of the two groups of insulators; the elastic flap is elastically connected to the printed circuit board, and the installation flap is connected to the adapter cavity; the shell is made of beryllium bronze.

[0014] Preferably, the first inner conductor and the second inner conductor are made of beryllium copper.

[0015] Preferably, the beryllium bronze includes but is not limited to C17300 and C17200.

[0016] Compared with the prior art, the present invention has the following beneficial technical effects:

[0017] The inner conductor is made of beryllium bronze by integral stamping. The elasticity of the material itself can achieve a larger axial tolerance between the plates, greatly simplifying the internal structure and avoiding the problem of instantaneous disconnection under vibration and temperature shock environment. It will not have instantaneous disconnection phenomenon, and improves reliability while maintaining electrical continuity. At the same time, the inner conductor is embedded inside the insulator and fixed by the outer shell, which is easy to assemble, greatly saving processing costs, material costs and labor costs, improving product consistency and reliability, and shortening the production cycle.

[0018] There are bending parts at both ends of the inner conductor, and the inner conductor is embedded to achieve working height matching between the plates, with good electrical continuity and adapt to larger axial tolerance. At the same time, the groove can match 50Ω impedance to achieve better indicators. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the explosion structure of the present invention;

[0020] Figure 2 is a schematic structural diagram of the first inner conductor of the present invention;

[0021] Figure 3 is a schematic structural diagram of the second inner conductor of the present invention;

[0022] Figure 4 It is a structural schematic diagram of the housing of the present invention;

[0023] Figure 5 It is a schematic diagram of the combined state of the inner conductor and the insulator in the present invention;

[0024] Figure 6 It is a structural schematic diagram of the prior art.

[0025] Description of the attached drawings

[0026] 10. First inner conductor; 11. Second inner conductor; 12. Groove; 13. Double-row bending portion; 14. Contact; 15. Single-row bending portion; 20. Insulator; 21. Pin; 22. Pin hole; 23. Step; 24. Upper placement groove; 25. Fixing groove; 30. Shell; 31. Elastic petal; 32. Barb; 33. Mounting petal; 34. Limiting step; 100. Bullet; 101. Sleeve; 102. Spring; 103. Needle; 104. Insulator; 105. Outer conductor. DETAILED DESCRIPTION

[0027] like Figures 1 to 5As shown, a board-to-board radio frequency connector based on a spring-engaged structure includes an inner conductor, an insulator 20 and a shell 30; the insulator 20 is divided into two groups, an inner conductor is arranged between the two groups of insulators 20, and the shell 30 is arranged on the upper ends of the two groups of insulators 20; the inner conductor includes a first inner conductor 10 and a second inner conductor 11, and the first inner conductor 10 and the second inner conductor 11 are arranged in an embedded manner between the two groups of insulators 20. The two groups of insulators 20 are used to install the first inner conductor 10 and the second inner conductor 11, and the first inner conductor 10 and the second inner conductor 11 are fixed in an embedded manner between the two groups of insulators 20, and then the shell 30 is installed on the upper ends of the two groups of insulators 20 for fixing.

[0028] The first inner conductor 10 and the second inner conductor 11 are both spring stamping integrated structures, including a groove 12, a bending portion and a contact 14; the groove 12 is provided with a bending portion at both ends; the upper end of the bending portion of the first inner conductor 10 is provided with a contact 14, and the lower end of the bending portion of the second inner conductor 11 is provided with a contact 14; the groove 12 and the bending portion of the first inner conductor 10 and the groove 12 and the bending portion of the second inner conductor 11 are embedded between the two groups of insulators 20, and the contacts 14 of the first inner conductor 10 and the second inner conductor 11 are located outside the upper and lower ends of the two groups of insulators 20. The first inner conductor 10 and the second inner conductor 11 are provided with a bending portion and a contact 14, and the electrical continuity is satisfied by the elasticity of the bending portion.

[0029] The bending portion includes a double-row bending portion 13 arranged at one end of the inner conductor and a single-row bending portion 15 arranged at the other end of the inner conductor; a convex clamping plate is provided at the end of the double-row bending portion 13, and the clamping plate is provided with a contact 14; a rectangular pressing plate is provided at the end of the single-row bending portion 15, and L-shaped clamping strips are provided on both sides of the rectangular pressing plate; the double-row bending portions 13 and the single-row bending portions 15 corresponding to each other of the first inner conductor 10 and the second inner conductor 11 are interlocked with each other, and are buckled together with the clamping plate through the corresponding grooves 12 and the L-shaped clamping strips.

[0030] An upper placement groove 24 and a lower placement groove for placing the bent portion are respectively provided at the upper and lower ends of the inner middle positions of the two groups of insulators 20 , and a fixing groove 25 for installing the groove 12 is provided between the upper placement groove 24 and the lower placement groove.

[0031] The two sets of insulators 20 are both provided with pins 21 and pin holes 22, and the pins 21 and pin holes 22 are located on both sides of the upper placement groove, the lower placement groove and the fixing groove, and the two sets of insulators 20 are connected by the pins 21 and the pin holes 22. After the first inner conductor 10 and the second inner conductor 11 are embedded, the groove 12 is installed in the fixing groove 25, and the bent portion is installed in the upper placement groove 24 and the lower placement groove respectively. The two sets of insulators 20 are assembled oppositely, and the two sets of insulators 20 are assembled by the provided pins 21 and the pin holes, and the first inner conductor 10 and the second inner conductor 11 are fixed.

[0032] The upper outer ends of the two groups of insulators 20 are provided with steps 23 that cooperate with the housing 30. The upper outer ends of the insulators 20 are provided with steps 23 that cooperate with the barbs 32 provided on the housing 30 to fix the insulators 20 through the housing 30 to prevent the two groups of insulators 20 from loosening.

[0033] The shell 30 is a stamped integrally formed cylindrical hollow structure. The upper end of the shell 30 is provided with an elastic petal 31, the lower end of the shell 30 is provided with a barb 32 and a mounting petal 33, and the inside of the shell 30 is provided with a limiting step 34. The shell 30 is inserted into the upper ends of the two sets of insulators 20, and is limited by the limiting step 34, and is fixed by the barb 32 and the outer diameter of the two sets of insulators 20 through interference fit; the elastic petal 31 is elastically connected to the printed circuit board, and the mounting petal 33 is connected to the adapter cavity; the shell 30 is made of beryllium bronze. The limiting step 34 abuts against the two sets of insulators 20 for limiting, and the barb 32 is fixed by the outer diameter of the insulator 20 through interference fit.

[0034] The first inner conductor 10 and the second inner conductor 11 are made of beryllium copper.

[0035] Beryllium bronze includes but is not limited to C17300 and C17200.

[0036] The first inner conductor 10 and the second inner conductor 11 are made of beryllium copper. The first inner conductor 10 and the second inner conductor 11 are formed by integral stamping of beryllium copper. Through the elasticity of the material itself, a larger axial tolerance between the plates is achieved, which greatly simplifies the internal structure, avoids the problem of instantaneous disconnection under vibration and temperature shock environment, and does not cause instantaneous disconnection. While maintaining electrical continuity, reliability is improved.

[0037] like Figure 6 As shown, the existing inter-board RF connector includes at least 6 parts, namely, a bullet 100, a spring 102, a needle 103, a sleeve 101, an insulating member 104, and an outer conductor 105. The bullet 100 contacts the needle 103, and the spring 102 is embedded between the needle 103 and the inner conductor. The bullets 100 at both ends contact the PCB boards at both ends at the same time, so as to meet the installation of PCB boards with different spacings, thereby meeting the use.

[0038] The mechanical stress simulation of the inner conductor in this application was performed to verify the following data:

[0039] Material Stress limit / MPa Simulation maximum stress / MPa Residual deformation / mm Beryllium Copper 1270 862.13 <![CDATA[3.98×10 -5 ]]>

[0040] It can be seen from the above table that the inner conductor uses beryllium copper. Within the axial tolerance range of the product, the maximum stress is less than the elastic limit of beryllium copper. The overall residual deformation after recovery is negligible, so it can meet customer requirements.

[0041] The axial resilience simulation of the inner conductor in this application was performed to verify the following data:

[0042] Material Upper compression 0.7mm Upper compression 0.8mm Upper compression 0.9mm Lower compression 0.7mm Lower compression 0.8mm Lower compression 0.9mm Beryllium Bronze 0.84305N 0.9609N 1.0782N 0.8847N 1.0028N 1.1167N

[0043] It can be seen from the above table that after being compressed by 0.7, 0.8, and 0.9 mm respectively, the resilience of the inner conductor contact can meet the requirements of simultaneously abutting against the PCB boards at both ends and achieving reliable connection.

[0044] The mechanical stress simulation of the shell in this application was carried out to obtain the following data:

[0045] Material Single flap compression 0.6mm Single flap compression 0.8mm Overall compression 0.6mm Overall compression 0.8mm Beryllium Copper 0.26N 0.36N 1.82N 2.52N

[0046] It can be seen from the above table that after being compressed by 0.6 and 0.8 mm respectively, the resilience of the elastic petals of the shell is sufficient to abut against the upper PCB board and achieve a reliable connection.

[0047] The electrical performance simulation of this application obtained the following data:

[0048] Required VSWR ≤1.2@DC~4GHz ≤1.35@4~6GHz Simulated VSWR ≤1.068@DC~4GHz ≤1.098@4~6GHz

[0049] The present invention is placed in the cavity model used by the customer to perform HFSS electrical performance simulation, wave port excitation is applied at both ends and the frequency used by the customer (DC~6.0GHz) is set. As can be seen from the above table, the standing wave can meet ≤1.2@DC~4.0GHz, ≤1.35@4.0~6.0GHz.

Claims

1. A board-to-board radio frequency connector based on a spring-engaged structure, characterized in that: The invention comprises an inner conductor, an insulator (20) and an outer shell (30); the insulator (20) is divided into two groups, the inner conductor is arranged between the two groups of insulators (20), and the outer shell (30) is arranged on the upper ends of the two groups of insulators (20); the inner conductor comprises a first inner conductor (10) and a second inner conductor (11), and the first inner conductor (10) and the second inner conductor (11) are arranged in a mosaic manner between the two groups of insulators (20).

2. The inter-board radio frequency connector based on the spring-engaging structure according to claim 1 is characterized in that: The first inner conductor (10) and the second inner conductor (11) are both spring sheet stamping type integrally formed structures, comprising a groove (12), a bending portion and a contact (14); the groove (12) is provided with the bending portion at both upper and lower ends; the contact (14) is provided at the upper end of the bending portion of the first inner conductor (10), and the contact (14) is provided at the lower end of the bending portion of the second inner conductor (11); the groove (12) and the bending portion of the first inner conductor (10) and the groove (12) and the bending portion of the second inner conductor (11) are arranged in an embedded manner between the two groups of insulators (20), and the contacts (14) of the first inner conductor (10) and the second inner conductor (11) are located outside the upper and lower ends of the two groups of insulators (20).

3. The inter-board radio frequency connector based on the reed interlocking structure according to claim 2, characterized in that: The bending portion comprises a double-row bending portion (13) arranged at one end of the inner conductor and a single-row bending portion (15) arranged at the other end of the inner conductor; a convex clamping plate is arranged at the end of the double-row bending portion (13), and the clamping plate is provided with the contact (14); a rectangular pressing plate is arranged at the end of the single-row bending portion (15), and L-shaped clamping strips are arranged on both sides of the rectangular pressing plate; the double-row bending portions (13) and the single-row bending portions (15) corresponding to each other of the first inner conductor (10) and the second inner conductor (11) are interlocked with each other, and are buckled together through the corresponding grooves (12), the L-shaped clamping strips and the clamping plate.

4. The inter-board radio frequency connector based on the reed interlocking structure according to claim 2, characterized in that: An upper placement groove (24) and a lower placement groove for placing the bending portion are respectively provided at the upper and lower ends of the middle positions inside the two groups of insulators (20), and a fixing groove (25) for installing the groove (12) is provided between the upper placement groove (24) and the lower placement groove.

5. The inter-board radio frequency connector based on the spring-engaging structure according to claim 4, characterized in that: The two groups of insulators (20) are both provided with pins (21) and pin holes (22), and the pins (21) and pin holes (22) are located on both sides of the upper placement groove, the lower placement groove and the fixing groove, and the two groups of insulators (20) are connected by the pins (21) and the pin holes (22).

6. The inter-board radio frequency connector based on the spring-engaging structure according to claim 1, characterized in that: The upper ends of the outer sides of the two groups of insulators (20) are both provided with steps (23) that match the housing (30).

7. The inter-board radio frequency connector based on the spring-engaging structure according to claim 6, characterized in that: The shell (30) is a cylindrical hollow structure formed by stamping. The upper end of the shell (30) is provided with an elastic flap (31), the lower end of the shell (30) is provided with a barb (32) and a mounting flap (33), and a limiting step (34) is provided inside the shell (30). The shell (30) is inserted into the upper ends of the two groups of insulators (20), and is limited by the limiting step (34), and is fixed by the barb (32) and the outer diameter of the two groups of insulators (20) through interference fit; the elastic flap (31) is elastically connected to the printed circuit board, and the mounting flap (33) is connected to the adapter cavity; the shell (30) is made of beryllium bronze.

8. The inter-board radio frequency connector based on the spring-engaging structure according to claim 3, characterized in that: The first inner conductor (10) and the second inner conductor (11) are made of beryllium copper.

9. The inter-board radio frequency connector based on the reed interlocking structure according to claim 8, characterized in that: The beryllium bronze includes but is not limited to C17300 and C17200.

Images