Three-coaxial deep-sea sealed connector, its internal plug, adapter and external plug

Abstract

The present invention relates to a three - coaxial deep - water sealed connector, its internal plug, adapter, and external plug. The three - coaxial deep - water sealed connector includes an adapter, an internal plug for plugging with one end of the adapter, and an external plug for plugging with the other end of the adapter. The adapter includes an adapter coaxial structure and an adapter housing coaxially assembled outside the adapter coaxial structure; the external plug includes an external plug coaxial structure and an external plug housing coaxially assembled outside the external plug coaxial structure; the internal plug includes an internal plug coaxial structure and a third insulator coaxially assembled outside the internal plug coaxial structure. The connector in the present invention adopts a three - coaxial structure, adding an additional outer - shell shielding layer to the working signal, so that external interference signals cannot directly interfere with the working signal inside the coaxial structure through the outer conductor, significantly improving the shielding efficiency. At the same time, it is also less likely to leak the coaxial working signal, reducing the risk of signal leakage and electromagnetic interference.

Description

Technical Field

[0001] The present invention belongs to the technical field of radio frequency coaxial connectors, and particularly relates to a triaxial deep - water sealed connector and its internal plug, adapter, and external plug. Background Art

[0002] Existing deep - water sealed radio frequency coaxial connectors are all coaxial structures. For example, Figure 1 , the signal transmission channels in the adapter 10 and the plug 20 that matches the adapter are composed of an outer conductor 30, a center conductor (center pin 40 or center jack 50), and an insulating medium 60. The outer conductor of the connector is directly exposed to the outside and also functions as the connector housing. The adapter housing needs to be installed on the panel of the whole machine, and the panel of the whole machine is generally the "ground" of the whole - machine system. In this way, the signal ground and the system ground are common - grounded. At this time, when the product transmits radio frequency signals during operation, the outer conductor of the connector is both the outer conductor for signal transmission and the shielding body for signal shielding. Due to inevitable factors such as the inevitable incompleteness of the outer conductor and the contact impedance at the contact part, other external interference signals can easily interfere with the working signals inside the coaxial transmission channel directly through the outer conductor. Coupled with the potential difference between the signal ground and the system ground existing to varying degrees, the system ground will then generate electromagnetic interference on the signal ground for the working signals. Similarly, the internal working signals can also easily leak out through the outer conductor, posing a risk of information leakage or causing electromagnetic interference to nearby related electronic devices. Summary of the Invention

[0003] To solve the problems existing in the prior art, the present invention proposes a triaxial deep - water sealed connector and its internal plug, adapter, and external plug.

[0004] The object of the present invention and the technical problems to be solved are achieved by adopting the following technical solutions. The triaxial deep - water sealed connector proposed according to the present invention includes an adapter, an internal plug for plugging into one end of the adapter, and an external plug for plugging into the other end of the adapter.

[0005] The adapter includes an adapter coaxial structure and an adapter housing coaxially assembled outside the adapter coaxial structure. The adapter coaxial structure includes a first outer conductor, a first insulating medium disposed inside the first outer conductor, and a first center conductor disposed inside the first insulating medium. A first insulator is provided between the first outer conductor and the adapter housing.

[0006] The external plug includes an external - plug coaxial structure and an external - plug housing coaxially assembled outside the external - plug coaxial structure. The external - plug coaxial structure includes a second outer conductor, a second insulating medium disposed inside the second outer conductor, and a second center conductor disposed inside the second insulating medium. A second insulator is provided between the second outer conductor and the adapter housing.

[0007] The internal plug includes an internal plug coaxial structure and a third insulator coaxially assembled outside the internal plug coaxial structure. The internal plug coaxial structure includes a third outer conductor, a third insulating medium disposed inside the third outer conductor, and a third center conductor disposed inside the third insulating medium.

[0008] Further, a first accommodation cavity for inserting one end of the second outer conductor is formed between the second insulator and the second outer conductor. A first elastic contact member for elastically contacting the first outer conductor is provided in the first accommodation cavity, and the first elastic contact member is sleeved outside the second outer conductor; a second accommodation cavity for inserting the other end of the second outer conductor is formed between the third insulator and the third outer conductor. A second elastic contact member for elastically contacting the first outer conductor is provided in the second accommodation cavity, and the second elastic contact member is sleeved outside the third outer conductor.

[0009] Further, both the first elastic contact member and the second elastic contact member include an annular main body, and the side surface of the annular main body is bent outward to form a plurality of elastic claws circumferentially distributed and used for elastically contacting the inner wall of the first outer conductor.

[0010] Further, the second insulator includes an insulating pressing plate and an insulating sleeve provided at the front end of the insulating pressing plate. The insulating sleeve is tightly fitted with the external plug housing, the insulating pressing plate is axially limited between the insulating sleeve and the external plug housing, a positioning spring is embedded on the inner peripheral surface of the insulating pressing plate, and the positioning spring has a positioning claw bent inward and used for axially blocking and cooperating with a corresponding installation groove on the outer peripheral surface of the second outer conductor.

[0011] Further, a positioning spring is embedded on the inner peripheral surface of the third insulator, and the positioning spring has a positioning claw bent inward and used for axially blocking and cooperating with a corresponding installation groove on the outer peripheral surface of the third outer conductor.

[0012] Further, a first guiding inclined surface for cooperating with the first outer conductor is provided at the front end of the second insulating medium, and a second guiding inclined surface for cooperating with the first outer conductor is provided at the front end of the third insulating medium.

[0013] Further, a first limiting platform for preventing the second center conductor from moving forward is provided on the outer peripheral surface of the second center conductor; a second limiting platform for preventing the third center conductor from moving forward is provided on the outer peripheral surface of the third center conductor.

[0014] Further, a connecting nut is rotatably sleeved outside the front end of the external plug housing. An insertion cavity for inserting the adapter housing is formed between the connecting nut and the external plug housing. A first sealing ring for sealingly cooperating with the end surface of the adapter housing is provided in the insertion cavity; a second sealing ring for sealingly cooperating with the outer peripheral surface of the adapter housing is embedded on the inner wall of the adapter housing.

[0015] Furthermore, during the mating process of the external plug and the adapter, first, the first outer conductor and the second outer conductor are mated in a guiding manner, then the adapter housing and the external plug housing are fitted together, and finally, the first center conductor and the second center conductor are mated.

[0016] The present invention also provides an adapter, which is the aforementioned adapter and will not be elaborated here.

[0017] The present invention also provides an external plug, which is the aforementioned external plug and will not be elaborated here.

[0018] The present invention also provides an internal plug, which is the aforementioned internal plug and will not be elaborated here.

[0019] By means of the above technical solutions, the beneficial effects of the present invention are as follows: The connector of this solution adopts a triple coaxial structure. The corresponding outer conductor of the connector is the signal ground, and the corresponding housing of the connector is the system ground. The coaxial structure between the signal ground and the system ground is mutually insulated and enclosed, which is equivalent to adding an additional outer shell shielding layer to the working signal. This makes it impossible for external interference signals to directly interfere with the working signal inside the coaxial structure through the outer conductor, and can only indirectly interfere with the working signal of the coaxial structure through the connector housing. This additional second-layer coaxial shielding structure has a significant attenuation loss for external interference signals, and the interference of the interference signal after attenuation will be significantly reduced. Since the signal ground and the system ground are completely separated, the potential difference between the two will not cause electromagnetic interference to the working signal, which significantly improves the shielding efficiency. The internal working signal is less likely to be affected by external interference and is also less likely to leak signals, reducing the risk of signal leakage and electromagnetic interference.

[0020] The above description is only an overview of the technical solution of the present invention. In order to understand the technical means of the present invention more clearly, it can be implemented according to the content of the specification. And in order to make the above and other purposes, features, and advantages of the present invention more obvious and understandable, the following specifically gives preferred embodiments and, in conjunction with the drawings, is described in detail as follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic structural diagram of a radio frequency coaxial connector in the prior art.

[0022] Figure 2 is a schematic structural diagram before mating of the internal plug, adapter, and external plug in an embodiment of the triple coaxial deep-water sealed connector of the present invention.

[0023] Figure 3 is a schematic cross-sectional structural diagram of the internal plug in the present invention.

[0024] Figure 4 is a schematic cross-sectional structural diagram of the adapter in the present invention.

[0025] Figure 5 It is a schematic cross-sectional structure diagram of the external plug in the present invention.

[0026] Figure 6 It is a schematic structure diagram of the first elastic contact member or the second elastic contact member in the present invention.

[0027] Figure 7 It is a schematic structure diagram of the positioning spring in the present invention. Specific embodiments

[0028] The technical solution of the present invention will be further described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0029] Embodiment of the three-coaxial deep-water sealed connector:

[0030] Please refer to Figures 1 to 7 , the three-coaxial deep-water sealed connector includes an adapter 1, an internal plug 3 for plugging into one end of the adapter, and an external plug 2 for plugging into the other end of the adapter. The end where the internal plug is plugged into the adapter is defined as the front end of the internal plug, and the end where the external plug is plugged into the adapter is defined as the front end of the external plug. When in use, the internal plug (i.e., the in-cabin connector) is located inside the device and works in the in-cabin environment; the adapter is installed on the device panel, and one end of it is docked with the in-cabin connector for use; the external plug works in the deep-water environment and is used as an out-of-cabin deep-water sealed connector for sealed connection with the adapter.

[0031] The adapter 1 includes an adapter coaxial structure and an adapter housing 11 coaxially assembled outside the adapter coaxial structure. The adapter coaxial structure includes a first outer conductor 12, a first insulating medium 13 provided inside the first outer conductor, and a first central conductor 14 provided inside the first insulating medium. A first insulator 15 is provided between the first outer conductor and the adapter housing; the first central conductor 14 is a central pin. The adapter housing, the first outer conductor, and the first central conductor form a three-layer coaxial structure.

[0032] The external plug 2 includes an external plug coaxial structure and an external plug housing 21 coaxially assembled outside the external plug coaxial structure. The external plug coaxial structure includes a second outer conductor 22, a second insulating medium 23 provided inside the second outer conductor, and a second central conductor 24 provided inside the second insulating medium. A second insulator 25 is provided between the second outer conductor and the adapter housing. The external plug housing, the second outer conductor, and the second central conductor form a three-layer coaxial structure.

[0033] The internal plug 3 includes an internal plug coaxial structure and a third insulator 31 coaxially assembled outside the internal plug coaxial structure. The internal plug coaxial structure includes a third outer conductor 32, a third insulating medium 33 disposed within the third outer conductor 32, and a third center conductor 34 disposed within the third insulating medium. In order to be inserted into both ends of the center pin in the adapter, both the second center conductor 24 and the third center conductor 34 are center jacks.

[0034] In the external plug 2, a first receiving cavity 26 for inserting one end of the second outer conductor is formed between the second insulator 25 and the second outer conductor 22. A first elastic contact member 27 for elastically contacting the first outer conductor is provided in the first receiving cavity 26. The first elastic contact member is sleeved and positioned in a corresponding slot on the outside of the second outer conductor. Similarly, a second receiving cavity 35 for inserting the other end of the second outer conductor is formed between the third insulator 31 and the third outer conductor 32. A second elastic contact member 36 for elastically contacting the first outer conductor is provided in the second receiving cavity 35. The second elastic contact member is sleeved and positioned in a corresponding slot on the outside of the third outer conductor. The structures of the first elastic contact member and the second elastic contact member are the same. For example, Figure 7 taking the first elastic contact member 27 as an example, it includes an annular main body 271. The annular main body has an axially penetrating opening 272 for easy installation. The side surface of the annular main body is bent outward to form a plurality of elastic claws 273 distributed circumferentially and used for elastically contacting the inner wall of the first outer conductor. Thus, after the external plug is inserted into the adapter, the second outer conductor and the first outer conductor can be stably contacted and conducted, and have anti-vibration contact ability.

[0035] Furthermore, the second insulator 25 includes an insulating pressing plate 251 and an insulating sleeve 252 provided at the front end of the insulating pressing plate. The insulating sleeve 252 is in a forced fit with the external plug housing to achieve relative fixation. The form of the forced fit can be that the outside of the insulating sleeve has a forced fit protrusion. The insulating pressing plate 251 is axially limited between the rear end surface of the insulating sleeve 252 and the step 211 of the external plug housing 21. A positioning spring 4 is embedded on the inner peripheral surface of the insulating pressing plate. The positioning spring 4 has a positioning claw 41 bent inward and used for backward blocking and cooperation with a corresponding installation groove on the outer peripheral surface of the second outer conductor. A first flange 221 for forward blocking and cooperation with the insulating pressing plate is provided on the outer peripheral surface of the second outer conductor 22, thereby realizing the axial installation and positioning of the external plug coaxial structure. Similarly, in the internal plug, a positioning spring 4 is also embedded on the inner peripheral surface of the third insulator. The positioning spring has a positioning claw 41 bent inward and used for backward blocking and cooperation with a corresponding installation groove on the outer peripheral surface of the third outer conductor. A second flange 321 for forward blocking and cooperation with the insulator is provided on the outer peripheral surface of the third outer conductor 32, thereby realizing the axial installation and positioning of the internal plug coaxial structure.

[0036] Preferably, a first guiding inclined surface 231 for guiding and mating with the first outer conductor is provided at the front end of the second insulating medium 23; a second guiding inclined surface 331 for guiding and mating with the first outer conductor is provided at the front end of the third insulating medium 33. The second / third insulating medium is arranged at the mating end of the corresponding plug. With the aid of the corresponding guiding inclined surface, it is beneficial to the guiding insertion of the coaxial structure of the inner / outer plug and the corresponding end of the first outer conductor.

[0037] In this embodiment, a first limiting platform 241 for preventing the second central conductor from moving forward is provided on the outer peripheral surface of the second central conductor 24. The second central conductor can be fixed to the second insulating medium by conventional fixing forms such as snap fit and forced fit. The second insulating medium and the second outer conductor can also be relatively fixed by forced fit. Similarly, a second limiting platform 341 for preventing the third central conductor from moving forward is provided on the outer peripheral surface of the third central conductor 34. The third central conductor can also be fixed to the third insulating medium by conventional fixing forms such as snap fit and forced fit. The third insulating medium and the third outer conductor can also be relatively fixed by forced fit.

[0038] Furthermore, a flange 111 is provided on the adapter housing 11. The flange cooperates with locking parts such as locking nuts to realize the fixed assembly of the adapter and the equipment surface. Generally, an O-ring for sealing with the end face of the equipment panel is sleeved on the adapter housing. The outer wall of the third insulator on the internal plug has an external thread, and the inner wall of one end of the adapter that mates with the internal plug has an internal thread to realize the threaded connection between the internal plug and the adapter. An external nut is also sleeved outside the internal plug to lock the internal plug at one end of the adapter after the threaded connection. A connection nut 28 is rotatably sleeved on the outside of the front end of the external plug housing. An insertion cavity 29 for inserting the adapter housing is formed between the connection nut 28 and the external plug housing. The connection nut is used to cooperate with the external thread of the adapter housing to realize insertion and locking. A first sealing ring 210 for sealingly mating with the end face of the adapter housing is provided in the insertion cavity. The first sealing ring is embedded in the end face of the second housing body; in addition, a second sealing ring 16 for sealingly mating with the outer peripheral surface of the adapter housing is embedded in the inner wall of the adapter housing. With the aid of this double-sealing design, a better insertion sealing effect between the adapter and the external plug can be realized to adapt to the deep-water environment.

[0039] At one end of the adapter where it mates with the internal plug, a first receiving cavity 17 for receiving the third insulator is formed between the adapter housing and the first outer conductor; at one end of the adapter where it mates with the external plug, a second receiving cavity 18 for receiving the external plug housing is formed between the adapter housing and the second outer conductor; the first insulating medium and the first insulator are both located at the middle position of the adapter. The first insulator seals and isolates the first and second receiving cavities.

[0040] The mating process of the internal plug and the adapter is as follows: First, the third outer conductor is mated with one end of the first outer conductor in a guiding manner; then, the third insulator is engaged with the adapter housing to achieve the second-stage mating guidance; finally, the central jack in the internal plug is mated with the central pin in the adapter. After mating in place, the first outer conductor is inserted into the second receiving cavity and is in elastic contact and conduction with the second elastic contact member.

[0041] The mating process of the external plug and the adapter is as follows: First, the second outer conductor is mated with the other end of the first outer conductor in a guiding manner; then, the external plug housing is engaged with the adapter housing to achieve the second-stage mating guidance; finally, the central jack in the external plug is mated with the central pin in the adapter. After mating in place, the first outer conductor is inserted into the first receiving cavity and is in elastic contact and conduction with the first elastic contact member; meanwhile, the mating end face of the adapter housing is in extrusion fit with the first sealing ring, and the second sealing ring is in extrusion fit with the outer peripheral surface of the second outer conductor to achieve the deep-water sealing mating effect.

[0042] After the internal plug, the adapter, and the external plug are mated with each other, the internal plug and the external plug can achieve the transmission of radio frequency signals or low-frequency signals. The adapter housing and the external plug housing achieve shielding conduction, covering the signal transmission channels of each internal conductor, improving the anti-interference performance of the deep-water sealing connector, and reducing signal leakage.

[0043] Embodiment of the adapter:

[0044] The adapter is the adapter described in the above embodiment of the three-coaxial deep-water sealing connector, which will not be elaborated here.

[0045] Embodiment of the external plug:

[0046] The external plug is the external plug described in the above embodiment of the three-coaxial deep-water sealing connector, which will not be elaborated here.

[0047] Embodiment of the internal plug:

[0048] The internal plug is the internal plug described in the above embodiment of the three-coaxial deep-water sealing connector, which will not be elaborated here.

[0049] The above are only the preferred embodiments of the present invention, and the details not described are all prior arts; any person skilled in the art, without departing from the scope of the technical solution of the present invention, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention shall still fall within the scope of the technical solution of the present invention.

Claims

1. A triple coaxial deep - water sealed connector, comprising an adapter, an internal plug for plugging into one end of the adapter, and an external plug for plugging into the other end of the adapter, characterized in that: The adapter includes an adapter coaxial structure and an adapter housing coaxially assembled outside the adapter coaxial structure. The adapter coaxial structure includes a first outer conductor, a first insulating medium disposed within the first outer conductor, and a first central conductor disposed within the first insulating medium. A first insulator is provided between the first outer conductor and the adapter housing; The external plug includes an external plug coaxial structure and an external plug housing coaxially assembled outside the external plug coaxial structure. The external plug coaxial structure includes a second outer conductor, a second insulating medium disposed within the second outer conductor, and a second central conductor disposed within the second insulating medium. A second insulator is provided between the second outer conductor and the adapter housing; The second insulating medium is disposed at the mating end of the external plug, and a first guiding inclined surface for guiding and mating with the first outer conductor by insertion is provided at the front end of the second insulating medium; The internal plug includes an internal plug coaxial structure and a third insulator coaxially assembled outside the internal plug coaxial structure. The internal plug coaxial structure includes a third outer conductor, a third insulating medium disposed within the third outer conductor, and a third central conductor disposed within the third insulating medium; The third insulating medium is disposed at the mating end of the internal plug, and a second guiding inclined surface for guiding and mating with the first outer conductor by insertion is provided at the front end of the third insulating medium.

2. The triple coaxial deep - water sealed connector according to claim 1, characterized in that: A first receiving cavity for inserting one end of the second outer conductor is formed between the second insulator and the second outer conductor. A first elastic contact member for elastically contacting the first outer conductor is provided in the first receiving cavity, and the first elastic contact member is sleeved outside the second outer conductor; A second receiving cavity for inserting the other end of the second outer conductor is formed between the third insulator and the third outer conductor. A second elastic contact member for elastically contacting the first outer conductor is provided in the second receiving cavity, and the second elastic contact member is sleeved outside the third outer conductor.

3. The triple coaxial deep-sea sealed connector according to claim 2, characterized in that: Both the first elastic contact member and the second elastic contact member include an annular body, and the side surface of the annular body is bent outward to form a plurality of circumferentially distributed elastic claws for elastically contacting the inner wall of the first outer conductor.

4. The tri-axial deep-water sealed connector according to claim 1, characterized in that: The second insulator includes an insulating pressing plate and an insulating sleeve provided at the front end of the insulating pressing plate. The insulating sleeve is force - fitted with the external plug housing, the insulating pressing plate is axially limited between the insulating sleeve and the external plug housing, and a positioning spring is embedded on the inner peripheral surface of the insulating pressing plate. The positioning spring has a positioning claw bent inward for axially blocking and mating with a corresponding mounting groove on the outer peripheral surface of the second outer conductor.

5. The three - coaxial deep - water sealed connector according to claim 1, wherein: A positioning spring is embedded on the inner peripheral surface of the third insulator. The positioning spring has a positioning claw bent inward for axially blocking and mating with a corresponding mounting groove on the outer peripheral surface of the third outer conductor.

6. The three-coaxial deep-water sealed connector according to claim 1, characterized in that: A first limiting platform for preventing the second central conductor from moving forward is provided on the outer peripheral surface of the second central conductor; A second limiting platform for preventing the third central conductor from moving forward is provided on the outer peripheral surface of the third central conductor.

7. The triple coaxial deep - water sealed connector according to claim 1, characterized in that: A connection nut is externally and rotatably sleeved on the front end of the external plug housing. The connection nut is used to cooperate with the external thread on the adapter housing. An insertion cavity for inserting the adapter housing is formed between the connection nut and the external plug housing. A first sealing ring that is in sealing cooperation with the end face of the adapter housing is provided in the insertion cavity. A second sealing ring that is in sealing cooperation with the outer peripheral surface of the adapter housing is embedded in the inner wall of the adapter housing.

8. The three - coaxial deep - water sealed connector according to claim 1, wherein: During the insertion process of the external plug and the adapter, first, the first outer conductor and the second outer conductor are inserted in a guiding manner, then the adapter housing and the external plug housing are mated, and finally, the first central conductor and the second central conductor are inserted.

9. External plug, characterized in that: The external plug is the external plug according to any one of claims 1-8.

10. Internal plug, characterized in that: The internal plug is the internal plug according to any one of claims 1-8.

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