A coaxial contact

Abstract

The present invention provides a coaxial contact, comprising a floating assembly and a fixed assembly that are docked with each other, an elastic member for elastically abutting against each other and a retaining ring for floating position limiting are provided between the floating assembly and the fixed assembly; the floating assembly comprises an inner conductor assembly and a first outer shell assembly that is sleeved on the outside of the inner conductor assembly, a first insulating medium is provided between the inner conductor assembly and the first outer shell assembly; the fixed assembly comprises a transition hole assembly that can dock with the inner conductor assembly, and a second outer shell assembly that is sleeved on the outside of the transition hole assembly, a second insulating medium is provided between the transition hole assembly and the second outer shell assembly. The present invention provides a coaxial contact, which is installed in an integrated module after being connected to a cable, can float itself, and the cable can be fixed while meeting electrical performance requirements. The contact is particularly suitable for use in environments where waterproof sealing is required and the cable needs to be bundled and fixed.

Description

Technical Field

[0001] The present invention relates to the technical field of connectors, specifically to the field of radio frequency coaxial connectors, and in particular to a coaxial contact piece. Background Art

[0002] With the development of miniaturization, integration and high frequency of electronic components, especially the increasingly higher requirements for the degree of integration, higher requirements are also placed on the reliability and sealing of products.

[0003] RF coaxial connectors are primarily used for the transfer and transmission of RF signals and are widely used in communications systems, microwave measurement systems, and instrumentation. RF coaxial connectors typically consist of a coaxially assembled outer and inner conductors, along with an insulator between the two conductors. Based on their functionality, they can be categorized as cable connectors, microstrip connectors, and adapters.

[0004] The RF coaxial connector for matching cables is mainly used to connect with RF coaxial cables to realize signal transmission. RF coaxial cables are composed of core wires, shielding layers and insulation layers. The connection between the connector and the RF coaxial cable is to connect the cable core wires with the inner conductor of the connector, and the cable shielding layer with the connector shell. When connecting, the continuity of the characteristic impedance must be ensured to ensure the quality of signal transmission.

[0005] The above-mentioned RF coaxial connectors have been widely used in production. However, when the cable bends or expands and contracts due to heat or cold, its core wire often causes the inner conductor of the connector to expand and contract. This is what the industry often calls the pin shrinkage phenomenon. Once this phenomenon occurs, it can cause changes in the internal structure and dimensions of the connector at the very least, and can directly cause the inner conductor to disconnect from the adapter connector, resulting in poor contact or open circuit problems.

[0006] The prior art has improved the above-mentioned technical problems. For example, patent application number: CN201210291892.6, patent name: Matching cable RF coaxial connector, discloses a matching cable RF coaxial connector, including an outer conductor and an inner conductor assembled in the outer conductor, wherein the outer conductor is provided with an insulating hard stop body, wherein the hard stop body is located at the rear end of the inner conductor and has a wire hole for the core wire of the corresponding coaxial cable to pass through. When the connector is connected to the corresponding coaxial cable, the shielding layer of the coaxial cable blocks the hard stop body from moving backward in the outer conductor, and the hard stop body presses against the inner conductor and prevents the inner conductor from moving backward in the outer conductor. Although the prior art provides a hard stop body to prevent the inner conductor from moving backward in the outer conductor, thereby solving the pin shrinkage problem of the existing matching cable RF coaxial connector, it still cannot absorb the mechanical stress generated during docking and cannot solve the problem of coaxial cable displacement.

[0007] For the RF coaxial contacts in the integrated module, it is not only necessary to realize the transmission of RF signals, but also required that the RF coaxial contacts can float freely in the integrated module to meet the reliable requirements of mechanical installation; at the same time, due to the increased sealing requirements of the integrated module, the integrated module needs to be sealed; in addition, for long integrated cable assemblies, the cable assemblies need to be bundled and tied and fixed.

[0008] In order to meet the floating requirements of the connector, the existing RF coaxial contacts mostly adopt the method of allowing the connector to float freely following the cable. The problems are: the cable cannot be fixed; especially for longer integrated cable assemblies, if the cable is not fixed, the tail end of the connector is subjected to greater force, which greatly reduces reliability; at the same time, it also cannot meet the requirements of waterproofing and sealing. Summary of the Invention

[0009] The present invention overcomes the shortcomings of the existing technology and provides a coaxial contact. After the contact is connected to the cable and installed in the integrated module, it can float itself and the cable can be fixed while meeting the electrical performance requirements. It is particularly suitable for use in environments where waterproof sealing is required and the cable needs to be tied and fixed in a harness.

[0010] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a coaxial contact piece, including a floating component and a fixed component that are docked with each other, and an elastic component for elastic spacing abutment and a retaining ring for floating limit are arranged between the floating component and the fixed component; the floating component includes an inner conductor assembly and a first outer shell assembly that is sleeved on the outside of the inner conductor assembly, and a first insulating medium is arranged between the inner conductor assembly and the first outer shell assembly; the fixed component includes a transition hole assembly that can be docked with the inner conductor assembly, and a second outer shell assembly that is sleeved on the outside of the transition hole assembly, and a second insulating medium is arranged between the transition hole assembly and the second outer shell assembly.

[0011] In a preferred embodiment of the present invention, the first shell assembly includes a first outer conductor with a central hole, a slot is provided on the outside of one end of the first outer conductor, a spring is provided in the slot, and the other end of the first outer conductor is connected to the second shell assembly.

[0012] In a preferred embodiment of the present invention, the inner conductor assembly includes a central conductor passing through the first insulating medium, and an elastic conductor assembling the first insulating medium and the central conductor and arranged inside the cavity of the first outer shell assembly.

[0013] In a preferred embodiment of the present invention, one end of the elastic conductor of the ring structure is embedded between the first insulating medium and the first outer conductor; the other end of the elastic conductor is elastically embedded between the first insulating medium and the second outer conductor.

[0014] In a preferred embodiment of the present invention, a limiting groove is provided on the first outer conductor, and the limiting groove cooperates with the retaining ring to provide a floating limiting space.

[0015] In a preferred embodiment of the present invention, at least one elastic tongue reed is axially provided at the other end of the elastic conductor and abuts against the first insulating medium, and the elastic tongue reed is in elastic contact with the second outer conductor.

[0016] In a preferred embodiment of the present invention, the center conductor includes a needle end correspondingly plugged into the adapter hole assembly and a docking end inserted into the first outer conductor; a limiting section is provided between the needle end and the docking end and is sleeved with the first insulating medium.

[0017] In a preferred embodiment of the present invention, the second housing assembly includes a butt joint sleeve connected to the first outer conductor, one end of the butt joint sleeve is provided with a second annular groove, and the other end of the butt joint sleeve is provided with an insertion end for inserting a cable.

[0018] In a preferred embodiment of the present invention, the adapter hole assembly includes a adapter hole supported by a second insulating medium, and inner holes are provided at both ends of the adapter hole. The inner hole at one end is elastically in contact with the center conductor, and the inner hole at the other end is fixed to the core wire of the cable inserted into the second outer shell assembly.

[0019] In a preferred embodiment of the present invention, a ring platform is provided on the outside of the docking sleeve near the insertion end, and the elastic member is sleeved on the outside of the docking sleeve. The elastic member is movably confined in a movable receiving cavity formed between the ring platform and the first shell assembly.

[0020] The present invention solves the defects existing in the technical background, and the beneficial technical effects of the present invention are:

[0021] The present invention discloses a coaxial contact piece, which is installed in an integrated module after being connected to a cable. The contact piece can float itself, and the cable can be fixed while meeting electrical performance requirements. The contact piece is particularly suitable for use in environments where waterproof sealing is required and the cable needs to be tied and fixed with a harness.

[0022] The shaft contact piece uses a retaining ring to movably limit the floating component and the fixed component, and realizes floating through the elastic piece; the elastic tongue of the elastic conductor realizes elastic contact with the second outer conductor, and the needle end of the center conductor realizes elastic contact with the adapter hole through the pinhole insertion, which meets both mechanical and electrical performances; the second shell assembly and the adapter hole assembly are fixedly connected through the cable; thereby, after the contact piece is connected to the cable and installed, the connector itself can be floated, and the cable can be fixed. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention will be further described below with reference to the accompanying drawings and examples.

[0024] Figure 1 It is a structural schematic diagram of a preferred embodiment of the present invention;

[0025] Figure 2 Schematic diagram of the external structure of a preferred embodiment of the present invention;

[0026] Figure 3 is a schematic cross-sectional view of a preferred embodiment of the present invention;

[0027] Figure 4 This is a schematic diagram of the external structure of a preferred embodiment of the present invention installed in an integrated module;

[0028] Figure 5 is a schematic cross-sectional view of a preferred embodiment of the present invention installed in an integrated module;

[0029] Figure 6 It is a structural exploded diagram of a preferred embodiment of the present invention;

[0030] Among them, 1-floating component, 11-first shell assembly, 111-spring, 112-first outer conductor, 12-inner conductor assembly, 121-elastic conductor, 122-first insulating medium, 123-center conductor, 2-fixed component, 21-second shell assembly, 211-elastic part, 212-second outer conductor, 22-transfer hole assembly, 221-transfer hole, 222-second insulating medium, 223-gasket, 3-retaining ring, 4-cable, X-axis line. DETAILED DESCRIPTION

[0031] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. These drawings are simplified schematic diagrams that only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0032] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, bottom, top, etc.), the directional indications are only used to explain the relative positional relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly. The terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. Unless otherwise clearly specified and defined, the terms "set", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be a communication between the internal parts of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] like Figures 1 to 6 As shown, a coaxial contact comprises a floating assembly 1 and a fixed assembly 2 that are connected to each other. An elastic member 211 for elastically abutting and a retaining ring 3 for floating position limiting are disposed between the floating assembly 1 and the fixed assembly 2. Under external force, the floating assembly 1 can perform linear reciprocating motion relative to the fixed assembly 2 in the axial direction. The elastic member 211 for elastically abutting and reciprocating motion between the floating assembly 1 and the fixed assembly 2 provides elastic abutment or resilient return. The elastic member 211 is preferably a spring, but is not limited to this type; other elastic structures may also be used. The elastic member 211 for elastically abutting and the retaining ring 3 for position limiting engagement between the floating assembly 1 and the fixed assembly 2 provide floating position limiting during linear reciprocating motion in the axial direction. More specifically, the floating assembly 1 and the fixed assembly 2 in the coaxial contact, combined with the elastic member 211 and the retaining ring 3, form a coaxial contact structure with an inner conductor, an insulator, and an outer conductor assembled from a central axis toward the outer periphery.

[0034] In a preferred embodiment of the present invention, the floating assembly 1 includes an inner conductor assembly 12 and a first outer shell assembly 11 sleeved outside the inner conductor assembly 12 , and a first insulating medium 122 is provided between the inner conductor assembly 12 and the first outer shell assembly 11 .

[0035] Specifically, the first housing assembly 11 includes a first outer conductor 112 extending through the center. A slot is provided at one end of the first outer conductor 112, and a spring 111 is disposed within the slot. Preferably, the slot is an annular groove 1, with the spring 111 disposed outside or surrounding the annular groove 1. The other end of the first outer conductor 112 is connected to the fixing assembly 2. Furthermore, the spring 111 has a protrusion.

[0036] Specifically, the inner conductor assembly 12 includes a center conductor 123 inserted into a first insulating medium 122, and an elastic conductor 121 sleeved between the first insulating medium 122 and the first outer conductor 112. More specifically, the center conductor 123 includes a pin end that plugs into the fixing assembly 2, and a mating end that inserts into the first outer conductor 112. A retaining section is provided between the pin end and the mating end, which inserts into the first insulating medium 122. Preferably, a tongue spring is provided at the mating end of the center conductor 123 to ensure a secure insertion of the entire contact during mating.

[0037] Furthermore, in a preferred embodiment of the present invention, the first insulating medium 122 of the floating assembly 1 is sleeved over the retaining section of the center conductor 123 in the inner conductor assembly 12. The elastic conductor 121 in the inner conductor assembly 12 is sleeved outside the first insulating medium 122, with the elastic conductor 121 and the outer portion of the first insulating medium 122 being interlocked and engaged. The elastic conductor 121 assembles the first insulating medium 122 and the center conductor 123 within the cavity of the first outer shell assembly 11. One end of the annular elastic conductor 121 is embedded between the first insulating medium 122 and the first outer conductor 112. The other end of the elastic conductor 121 is provided with one or more elastic springs that abut against the first insulating medium 122. The elastic springs are in elastic contact with the fixed assembly 2, and a gap is reserved between the elastic conductor 121 and the first outer shell assembly 11. The elastic conductor 121 and the first insulating medium 122 cooperate to coaxially confine the center conductor 123 within the first outer conductor 112, separating the center conductor 123 from the first outer conductor 112 and preventing electrical contact.

[0038] In a preferred embodiment of the present invention, the fixing assembly 2 includes a transition hole assembly 22 that can be docked with the inner conductor assembly 12, and a second shell assembly 21 that is sleeved on the outside of the transition hole assembly 22. A second insulating medium 222 is arranged between the transition hole assembly 22 and the second shell assembly 21. The second insulating medium 222 is embedded in the cavity of the second shell assembly 21, and the second insulating medium 222 supports the transition hole assembly 22 to be embedded in the cavity of the second shell assembly 21.

[0039] Specifically, in a preferred embodiment of the present invention, the second outer shell assembly 21 includes a docking sleeve that docks with the first outer conductor 112, and a boss is provided on the inner part of the docking sleeve at one end close to the first outer conductor 112. The fixed component 2 can dock, engage, and abut with the protruding retaining ring or protrusion on the elastic tongue spring in the floating component 1 through the boss to achieve movable docking between the fixed component 2 and the floating component 1.

[0040] Furthermore, a second annular groove is provided on the outer side of the end of the butt joint sleeve near the first outer conductor 112, and an insertion end for inserting the cable 4 is provided on the other end of the butt joint sleeve. A limit groove is provided on the inner wall of the end of the first outer conductor 112 near the second housing assembly 21. The limit groove corresponds to the second annular groove, and a retaining ring is embedded in the second annular groove and slidably embedded in the second annular groove. The limit groove, retaining ring 3, and the second annular groove provide floating limit.

[0041] Furthermore, a ring platform is provided on the exterior of the docking sleeve near the insertion end, and an elastic member 211 is sleeved on the exterior of the docking sleeve. The elastic member 211 is movably confined within a movable receiving cavity formed between the ring platform and the first housing assembly 11, thereby forming an elastic abutment between the fixed assembly 2 and the floating assembly 1.

[0042] Specifically, in a preferred embodiment of the present invention, the transition hole assembly 22 includes a transition hole 221 supported by a second insulating medium 222, and a gasket 223 embedded within the second outer shell assembly 21. The transition hole 221 has inner holes at both ends. The inner hole at one end elastically contacts the center conductor 123, while the inner hole at the other end secures the core wire of the cable 4 inserted into the second outer shell assembly 21. More specifically, the second outer conductor 212 is secured to the shielding layer of the cable 4.

[0043] Working principle of the present invention:

[0044] like Figures 1 to 6 As shown, the first shell assembly 11 and the second shell assembly 21 that movably connects to the first shell assembly 11 form an outer conductor; the inner conductor assembly 12 and the transfer hole assembly 22 that plugs into the inner conductor assembly 12 form an inner conductor; and the inner conductor and the outer conductor are installed with spacing by an insulator. The insulator includes a first insulating medium 122 that is sleeved between the first shell assembly 11 and the inner conductor assembly 12, and a second insulating medium 222 that is sleeved between the second shell assembly 21 and the transfer hole assembly 22. An elastic member 211 is provided between the first shell assembly 11 and the second shell assembly 21 for elastic spacing and abutment, and a retaining ring is also provided between the first shell assembly 11 and the second shell assembly 21 for limiting connection. Elastic contact is achieved by the needle end of the inner conductor 123 and the inner hole of the transfer hole 221 through pinhole insertion.

[0045] In use: When floating assembly 1 is subjected to axial force, elastic member 211 compresses, causing the two elastic contact portions of floating assembly 1 and fixed assembly 2 to shift. This compression of elastic member 211 allows floating assembly 1 to float axially within the coaxial contact. When cable 4 is installed and plugged into fixed assembly 2 of the coaxial contact, elastic member 211 compresses, preventing cable 4 and fixed assembly 2 from moving.

[0046] When the force is removed, the elastic part 211 rebounds, and the up and down floating distance is limited by the retaining ring 3; inside the coaxial contact part, an elastic tongue spring is provided on the elastic conductor 121 in the inner conductor assembly 12, and the elastic tongue spring is in elastic contact with the second outer conductor 212. The needle end of the center conductor 123 in the inner conductor assembly 12 is matched with the adapter hole 221 through the pinhole and is in elastic contact. When the coaxial contact part is connected to the cable 4, the adapter hole assembly 22 is fixed together with the second shell assembly 21. At this time, when the coaxial contact part is compressed by force, it can float.

[0047] To prevent the cable 4 from floating up and down with the coaxial contact, which could prevent it from being secured, a transition hole 221 is provided inside the coaxial contact, along with an elastic member 211 and a retaining ring 3 on the outside. After the cable 4 is assembled onto the coaxial contact, the second outer conductor 212, the cable 4, and the transition hole assembly 22 are secured together. When the coaxial contact is installed into the integrated module and mated, the elastic member compresses, causing only the coaxial contact's floating assembly 1 to move, while the fixed assembly 2 and the cable 4, which are fixedly connected to it, remain fixed in place.

[0048] The above specific implementation methods are specific support for the scheme ideas proposed in the present invention, and cannot be used to limit the scope of protection of the present invention. Any equivalent changes or equivalent modifications made on the basis of this technical scheme in accordance with the technical ideas proposed in the present invention still fall within the scope of protection of the technical scheme of the present invention.

Claims

1. A coaxial contact, comprising a floating component (1) and a fixed component (2) that are butted against each other, characterized in that: An elastic member (211) for elastically abutting against each other and a retaining ring (3) for floating limiting are provided between the floating assembly (1) and the fixed assembly (2); The floating assembly (1) comprises an inner conductor assembly (12) and a first outer shell assembly (11) sleeved outside the inner conductor assembly (12), wherein a first insulating medium (122) is provided between the inner conductor assembly (12) and the first outer shell assembly (11); The fixing assembly (2) comprises a transfer hole assembly (22) capable of docking with the inner conductor assembly (12), and a second shell assembly (21) sleeved on the outside of the transfer hole assembly (22), wherein a second insulating medium (222) is provided between the transfer hole assembly (22) and the second shell assembly (21); The first shell assembly (11) includes a first outer conductor (112) with a central opening, a slot being provided on the outside of one end of the first outer conductor (112), a spring (111) being provided in the slot, and the other end of the first outer conductor (112) being connected to the second shell assembly (21); A limiting groove is provided on the first outer conductor (112), and the limiting groove cooperates with the retaining ring (3) to provide a floating limiting space; The other end of the elastic conductor (121) is axially provided with at least one elastic tongue spring that abuts against the first insulating medium (122), and the elastic tongue spring is in elastic contact with the second outer conductor (212); The central conductor (123) comprises a needle end correspondingly plugged into the transition hole fitting (22), and a butt end inserted into the first outer conductor (112); a limiting section inserted into and sleeved with the first insulating medium (122) is provided between the needle end and the butt end; The second housing assembly (21) comprises a butt joint sleeve that is butt jointed with the first outer conductor (112), one end of the butt joint sleeve being provided with a second annular groove, and the other end of the butt joint sleeve being provided with an insertion end for inserting a cable (4); A ring platform is provided on the outside of the butt joint sleeve on one side close to the insertion end, and an elastic member (211) is sleeved on the outside of the butt joint sleeve. The elastic member (211) is movable and confined in a movable receiving cavity formed between the ring platform and the first housing assembly (11).

2. The coaxial contact according to claim 1, characterized in that: The inner conductor assembly (12) includes a center conductor (123) passing through the first insulating medium (122), and an elastic conductor (121) assembled with the first insulating medium (122) and the center conductor (123) and arranged inside the cavity of the first shell assembly (11).

3. The coaxial contact according to claim 2, characterized in that: One end of the elastic conductor (121) of the ring structure is embedded between the first insulating medium (122) and the first outer conductor (112); the other end of the elastic conductor (121) is elastically embedded between the first insulating medium (122) and the second outer conductor (212).

4. The coaxial contact according to claim 3, characterized in that: The adapter hole assembly (22) includes an adapter hole (221) supported by a second insulating medium (222), and inner holes are provided at both ends of the adapter hole (221). The inner hole at one end of the adapter hole (221) is in elastic contact with the central conductor (123), and the inner hole at the other end of the adapter hole (221) is fixed to the core wire of the cable (4) inserted into the second housing assembly (21).

5. The coaxial contact according to claim 4, characterized in that: A ring platform is provided on the outside of the docking sleeve on one side close to the insertion end, and the elastic member (211) is sleeved on the outside of the docking sleeve. The elastic member (211) is movably confined in a movable receiving cavity formed between the ring platform and the first housing assembly (11).

Images