Coaxial contact and electric connector
By designing a coaxial contact with a rigid outer and inner conductor and a dielectric body covering an elastic spring, the problem of inner conductor damage in the prior art is solved, and the stability and reliability of signal transmission are achieved.
Patent Information
- Application Number
- CN202520214175.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-11
- Publication Date
- 2026-01-27
- Estimated Expiration
- 2035-02-11
AI Technical Summary
Existing coaxial contacts, when manufactured with excessive precision or improperly mated, are prone to causing the inner conductor's coaxiality to exceed the design range, resulting in damage and affecting signal transmission and use.
Design a coaxial contact, including a pin contact and a socket contact, employing an outer conductor, an inner conductor, a dielectric body, and an elastic spring structure. The outer and inner conductors are rigid structures, and the dielectric body covers the elastic spring to provide protection and guidance, ensuring no damage during mating.
By guiding the rigid structure and protecting the dielectric body, damage to the inner conductor is avoided, ensuring mating within the coaxiality requirement range, improving structural and operational reliability, and guaranteeing the stability of signal transmission.
Smart Images
Figure CN223843295U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of connector technology, and in particular relates to a coaxial contact and an electrical connector using the coaxial contact. Background Technology
[0002] Currently, most domestic hybrid electrical connectors or RF integrated connectors with stable amplitude and phase transmission of RF signals consist of two main parts: coaxial contacts and electrical connectors. The coaxial contacts are installed in the contact holes of the electrical connector through steps and positioning springs, forming hybrid electrical connectors or RF integrated electrical connectors, such as J599 connectors and VPX connectors.
[0003] Currently, the coaxial contacts used in this type of connector mainly include inner and outer conductors with coaxial distribution. When the coaxial pin contacts and coaxial socket contacts begin to mate after being guided by the connector housing or other guiding mechanisms, the outer conductors of the two coaxial contacts begin to mate first, followed by the inner conductors. At this point, if the inner conductors of the two correctly designed and manufactured coaxial contacts are within the design-allowed coaxiality accuracy range, they can mate normally and function properly. However, if the manufacturing precision of the parts exceeds tolerance, or if the connector is used improperly, the inner conductors of the two coaxial contacts may be damaged due to coaxiality or misalignment exceeding the design allowable range, ultimately affecting the normal signal transmission and use of the connector.
[0004] To address the aforementioned issues, a coaxial contact element and an electrical connector using the coaxial contact element are designed. Utility Model Content
[0005] This utility model addresses the problems in the prior art by proposing the following technical solution:
[0006] A coaxial contact includes a pluggable coaxial pin contact and a coaxial socket contact. The coaxial pin contact includes an inner conductor A and an outer conductor A that is axially connected through the middle. The inner conductor A is located inside the outer conductor A and is coaxially arranged with it. The plugging end of the inner conductor A has an inner socket. The inner conductor A has a plurality of axially distributed slots at the position of the inner socket. The inner conductor A between two adjacent slots forms an elastic spring. A dielectric body A is disposed between the inner conductor A and the outer conductor A. The dielectric body A covers the elastic spring. A pin cavity is formed between the inner cavity of the dielectric body A and the inner cavity of the outer conductor A.
[0007] The coaxial socket contact includes an inner conductor B and an outer conductor B that extends axially through the middle. The inner conductor B is located inside the outer conductor B and is coaxially arranged with it. The inner conductor B has a pin at its mating end. A dielectric body B is arranged between the inner conductor B and the outer conductor B. The mating end of the inner conductor B extends to the outside of the dielectric body B and is fitted with a contact head. A socket cavity one is formed between the inner conductor B and the inner cavity of the contact head. A socket cavity two is formed between the contact head and the inner cavity of the outer conductor B.
[0008] When the coaxial pin contact and the coaxial socket contact are plugged in, the outer conductor A mates with the socket cavity 2, the contact head mates with the pin cavity, the inner conductor A, which is covered by the dielectric body A, mates with the socket cavity 1, and the pin mates with the inner socket.
[0009] As a preferred embodiment of the above technical solution, the outer ring sidewall of the dielectric body A extends radially outward to form a step one, and the inner ring sidewall of the outer conductor A extends radially inward to form a step two. The dielectric body A is assembled inside the outer conductor A, and step two abuts against step one.
[0010] As a preferred embodiment of the above technical solution, the contact head has a fixing part, and the contact head is interference-fitted with the inner wall of the outer conductor B through the fixing part;
[0011] The contact head has multiple slots distributed axially at its insertion end, and the contact head between two adjacent slots forms an elastic spring.
[0012] As a preferred embodiment of the above technical solution, the outer ring of the insertion end of the outer conductor A is provided with a slope one, the inner ring of the insertion end of the outer conductor B is provided with a slope two, and the outer ring of the insertion end of the elastic spring two is provided with a slope three.
[0013] As a preferred embodiment of the above technical solution, the coaxial socket contact further includes a housing, which is sleeved on the outside of the outer conductor B and slides axially therewith. There is a gap between the middle of the outer wall of the housing and the inner wall of the housing, and a spring for pushing the outer conductor B to reset is installed in the gap.
[0014] Electrical connectors, including plugs and sockets for pluggable connections;
[0015] The plug is equipped with any of the coaxial pin contacts described above;
[0016] The socket is equipped with any of the coaxial socket contacts described above.
[0017] The beneficial effects of this utility model are as follows:
[0018] In this technical solution, a coaxial contact, a coaxial pin contact, and a coaxial socket contact are provided. 1. The two rigid structures, outer conductor A and outer conductor B, guide the insertion process. Based on the advantages of high strength and no stress concentration points of the rigid structures, they are not easily damaged. At the same time, they have a guiding role during the insertion process, ensuring that the contact head and outer conductor A are within the required coaxiality range, preventing damage or breakage due to eccentricity, and ensuring the integrity of the outer conductor of the contact during the insertion process.
[0019] 2. The design of the medium body A covering the elastic spring in the coaxial pin contact protects the inner hole in the coaxial pin contact. When the inner hole is subjected to the oblique insertion force of the pin, the medium body A will prevent the elastic spring at the inner hole from abnormally opening and causing damage. This reduces the risk of damage to the inner hole in the coaxial pin contact during the connector mating process and improves its structural and operational reliability. Attached Figure Description
[0020] Figure 1 The diagram shown is a schematic diagram of the engagement state of the coaxial contact in Embodiment 1;
[0021] Figure 2 The diagram shown is a structural schematic of the coaxial contact in Embodiment 1;
[0022] Figure 3 The diagram shown is a schematic diagram of the internal structure of the mating end of the coaxial contact in Embodiment 1;
[0023] Figure 4 The diagram shown is a cross-sectional view of the inner conductor A in Example 1;
[0024] Figure 5 The diagram shown is a three-dimensional structural schematic of the inner conductor A in Example 1;
[0025] Figure 6 The diagram shown is a cross-sectional view of medium A in Example 1;
[0026] Figure 7 The diagram shown is a three-dimensional structural schematic of medium A in Example 1;
[0027] Figure 8 The diagram shown is a schematic diagram of the contact head in Embodiment 1.
[0028] Reference numerals: coaxial pin contact 10; inner conductor A11; inner insertion hole 111; slot one 112; elastic spring one 113; dielectric body A12; step one 121; outer conductor A13; step two 131; pin cavity 14;
[0029] Coaxial socket contact 20; inner conductor B21; pin 211; dielectric body B22; contact head 23; fixing part 231; slot 232; elastic spring 233; outer conductor B24; socket cavity 1 25; socket cavity 2 26; outer shell 27; spring 28. Detailed Implementation
[0030] To make the objectives, technical solutions, and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments.
[0031] Example 1
[0032] like Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, a coaxial contact includes a coaxial pin contact 10 and a coaxial socket contact 20 that are pluggable. In this embodiment, the end of the coaxial pin contact 10 that is plugged into the coaxial socket contact 20 is the insertion end, and the end opposite to the insertion end is the tail end termination part. This embodiment mainly describes the specific settings of the insertion end. The specific content of the tail end termination part is not the design point of this patent, so it will not be described in detail.
[0033] The coaxial pin contact 10 includes an inner conductor A11 and an outer conductor A13 that passes through the middle. The inner conductor A11 is located inside the outer conductor A13 and is coaxially arranged with it. The inner conductor A11 has an inner insertion hole 111 at the insertion hole 111. The inner conductor A11 has a plurality of axially distributed slots 112 at the position of the inner insertion hole 111. The inner conductor A11 between two adjacent slots 112 forms an elastic spring 113. The arrangement of the elastic spring 113 provides elastic contact and realizes the reliability of the connection between the insertion end of the pin 211 and the inner wall of the inner insertion hole 111. A dielectric body A12 is arranged between the inner conductor A11 and the outer conductor A13. The dielectric body A12 covers the elastic spring 113. The inner cavity of the dielectric body A12 and the inner cavity of the outer conductor A13 form a pin cavity 14.
[0034] The coaxial socket contact 20 includes an inner conductor B21 and an outer conductor B24 that extends axially through the middle. The inner conductor B21 is located inside the outer conductor B24 and is coaxially arranged with it. The mating end of the inner conductor B21 is provided with a pin 211. A dielectric body B22 is provided between the inner conductor B21 and the outer conductor B24. The mating end of the inner conductor B21 extends to the outside of the dielectric body B22 and is fitted with a contact head 23. A socket cavity 1 25 is formed between the inner conductor B21 and the inner cavity of the contact head 23, and a socket cavity 26 is formed between the contact head 23 and the inner cavity of the outer conductor B24. In this embodiment, both the outer conductor A13 and the outer conductor B24 are rigid structures.
[0035] In this technical solution, a coaxial contact element, when the coaxial pin contact 10 and the coaxial socket contact 20 are engaged, begin to engage under the guidance of the connector housing. The outer conductors A13 and B24 initiate the engagement first, with the outer conductor A13 engaging with the socket cavity 26. Then, the contact head 23 in the coaxial socket contact 20 engages with the inner wall of the outer conductor A13, i.e., the contact head 23 engages with the pin cavity 14. Finally, the inner conductor A11, covered by the dielectric A12, engages with the socket cavity 25, and the pin 211 engages with the inner socket 111. At this point, the inner conductor A11 and the inner conductor B21 form a complete internal radio frequency transmission channel, while the outer conductor A13, the contact head 23, and the outer conductor B24 form an external radio frequency transmission channel. The internal and external radio frequency transmission channels are isolated by a dielectric layer composed of dielectrics A12 and B22, achieving reliable signal transmission.
[0036] In this technical solution, a coaxial contact, a coaxial pin contact 10, and a coaxial socket contact 20, during the insertion process, are guided by two rigid structures, outer conductor A13 and outer conductor B24. These rigid structures have the advantages of high strength and no stress concentration points, making them less prone to damage. Simultaneously, they guide the insertion process, ensuring that the contact head 23 and the outer conductor A13 are within the required coaxiality range, preventing damage due to eccentricity and ensuring the integrity of the outer conductors during insertion.
[0037] 2. The arrangement of the dielectric body A12 covering the elastic spring 113 in the coaxial pin contact 10 protects the inner insertion hole 111 in the coaxial pin contact 10. When the inner insertion hole 111 is subjected to the oblique insertion force of the pin 211, the dielectric body A12 will limit the elastic spring 113 at the inner insertion hole 111 from abnormally opening and causing damage, thereby reducing the risk of damage to the inner insertion hole 111 in the coaxial pin contact 10 during the connector mating process and improving its structural reliability and operational reliability.
[0038] To achieve stable assembly of the internal structure of the coaxial pin contact 10, such as Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 As shown, the outer ring sidewall of dielectric A12 extends radially outward to form step 121, and the inner ring sidewall of outer conductor A13 extends radially inward to form step 231. Dielectric A12 is assembled inside outer conductor A13, and step 231 abuts against step 121.
[0039] To achieve stable assembly of the internal structure of the coaxial socket contact 20, such as Figure 3 , Figure 8As shown, the contact head 23 has a fixing part 231, and the contact head 23 is interference-fitted with the inner wall of the outer conductor B24 through the fixing part 231.
[0040] The mating end of the contact head 23 has a plurality of slots 232 distributed axially, and the contact head 23 between two adjacent slots 232 forms an elastic spring 233; the setting of the elastic spring 233 provides elastic contact and improves the reliability of the connection between the mating end of the contact head 23 and the inner wall of the outer conductor A13.
[0041] To improve the ease of engagement between the coaxial pin contact 10 and the coaxial socket contact 20, such as Figure 3 , Figure 8 As shown, the outer ring of the mating end of the outer conductor A13 is provided with slope one, and the inner ring of the mating end of the outer conductor B24 is provided with slope two. Slope one and slope two cooperate to improve the ease of inserting the outer conductor A13 into the second socket cavity 26. The outer ring of the mating end of the second elastic spring 233 is provided with slope three to improve the ease of inserting the mating end of the contact head 23 into the pin cavity 14.
[0042] To ensure reliable contact of the coaxial contact components in this technical solution, further, such as Figure 1 , Figure 2 , Figure 3 As shown, the coaxial socket contact 20 also includes a housing 27, which is sleeved on the outside of the outer conductor B24 and slides with it in the axial direction. There is a gap between the middle of the outer wall of the housing 27 and the inner wall of the housing 27, and a spring 28 for pushing the outer conductor B24 to reset is installed in the gap.
[0043] After the electrical connector with the coaxial contact in this technical solution is fully engaged, the coaxial pin contact 10 and the coaxial socket contact 20 are also fully engaged. The spring 28 in the coaxial socket contact 20 is compressed, and the reaction force of the spring 28 promotes the tight engagement of the outer conductor and inner conductor of the coaxial pin contact 10 and the coaxial socket contact 20, respectively, to form a radio frequency transmission channel and realize reliable signal transmission.
[0044] like Figure 1 , Figure 2 As shown, the electrical connector includes a plug and a socket for plugging and unplugging; in this embodiment, the electrical connector is specifically a hybrid electrical connector or a radio frequency integrated electrical connector.
[0045] The plug is equipped with any of the above-mentioned coaxial pin contacts 10; more specifically, in the coaxial pin contact 10, a convex ring is provided on the outer ring of the outer conductor A13 to facilitate the assembly of the coaxial pin contact 10 with the plug.
[0046] The socket is equipped with any of the coaxial socket contact members 20 mentioned above; more specifically, in the coaxial socket contact member 20, a second protruding ring is provided on the outer ring of the outer shell 27 to facilitate the assembly of the coaxial socket contact member 20 with the socket.
[0047] The electrical connector in this technical solution uses a coaxial pin contact 10 in the plug and a coaxial socket contact 20 in the socket. During the mating process, two rigid structures, outer conductor A13 and outer conductor B24, guide the mating and ensure the integrity of the contacts during the mating process. The dielectric body A12 covers the elastic spring 113, which reduces the risk of damage to the inner socket 111 in the coaxial pin contact 10 during the connector mating process, improves its structural reliability and operational reliability, and ensures the service life of the electrical connector.
[0048] The above embodiments are only used to illustrate the technical solution of this utility model, and are not intended to limit it.
Claims
1. A coaxial contact, comprising a coaxial pin contact (10) and a coaxial socket contact (20) for plug-in connection, characterized in that, The coaxial pin contact (10) includes an inner conductor A (11) and an outer conductor A (13) that is axially connected in the middle. The inner conductor A (11) is located inside the outer conductor A (13) and is coaxially arranged with it. The inner conductor A (11) has an inner insertion hole (111) at the insertion end. The inner conductor A (11) has a plurality of axially distributed slots (112) at the position of the inner insertion hole (111). The inner conductor A (11) between two adjacent slots (112) forms an elastic spring (113). A dielectric body A (12) is provided between the inner conductor A (11) and the outer conductor A (13). The dielectric body A (12) covers the elastic spring (113). A pin cavity (14) is formed between the dielectric body A (12) and the inner cavity of the outer conductor A (13). The coaxial socket contact (20) includes an inner conductor B (21) and an outer conductor B (24) that is axially connected in the middle. The inner conductor B (21) is located inside the outer conductor B (24) and is coaxially arranged with it. The inner conductor B (21) is provided with a pin (211) at the insertion end. A dielectric body B (22) is provided between the inner conductor B (21) and the outer conductor B (24). The insertion end of the inner conductor B (21) extends to the outside of the dielectric body B (22) and is fitted with a contact head (23). A socket cavity one (25) is formed between the inner conductor B (21) and the inner cavity of the contact head (23). A socket cavity two (26) is formed between the contact head (23) and the inner cavity of the outer conductor B (24). When the coaxial pin contact (10) and the coaxial socket contact (20) are plugged in, the outer conductor A (13) engages with the second socket cavity (26), the contact head (23) engages with the pin cavity (14), the inner conductor A (11) covered by the dielectric body A (12) engages with the first socket cavity (25), and the pin (211) engages with the inner socket (111).
2. A coaxial contact element according to claim 1, characterized in that, The outer ring sidewall of the dielectric body A (12) extends radially outward to form step one (121), and the inner ring sidewall of the outer conductor A (13) extends radially inward to form step two (131). The dielectric body A (12) is assembled inside the outer conductor A (13), and step two (131) abuts against step one (121).
3. A coaxial contact element according to claim 1, characterized in that, The contact head (23) has a fixing part (231), and the contact head (23) is interference-fitted with the inner wall of the outer conductor B (24) through the fixing part (231); The contact head (23) has a plurality of slots (232) that are axially distributed at the insertion end, and the contact head (23) between two adjacent slots (232) forms an elastic spring (233).
4. A coaxial contact element according to claim 1, characterized in that, The outer ring of the insertion end of the outer conductor A (13) is provided with slope one, the inner ring of the insertion end of the outer conductor B (24) is provided with slope two, and the outer ring of the insertion end of the elastic spring sheet two (233) is provided with slope three.
5. A coaxial contact element according to claim 3, characterized in that, The coaxial socket contact (20) also includes a housing (27), which is sleeved on the outside of the outer conductor B (24) and slides with it in the axial direction. There is a gap between the middle of the outer wall of the housing (27) and the inner wall of the housing (27), and a spring (28) for pushing the outer conductor B (24) to reset is installed in the gap.
6. An electrical connector, characterized in that, This includes plugs and sockets with pluggable connections; The plug is equipped with a coaxial pin contact (10) as described in any one of claims 1-5; The socket is equipped with a coaxial socket contact (20) as described in any one of claims 1-5.