Sealed cable assembly

Abstract

The invention discloses a sealed cable assembly which comprises a first outer conductor, a second outer conductor, a glass body, a first inner conductor, a second inner conductor, a third inner conductor and a cable outer conductor. The first outer conductor is provided with a first cavity channel, a second cavity channel and a third cavity channel; one end of the second outer conductor extends into the third cavity channel and is in seamless connection with the first outer conductor, and the second outer conductor is provided with a fourth cavity channel; the second cavity is filled with the glass body; the second inner conductor comprises a first section, a second section and a third section, a convex ring is arranged on the outer wall of the second section, and the second inner conductor and the fourth cavity are coaxial with the first cavity; the first inner conductor is positioned in the fourth cavity channel and is connected with the third section; the third inner conductor is positioned in the first cavity channel and is connected with the first section; the cable outer conductor surrounds the second outer conductor, and one end of the cable outer conductor is connected with the first outer conductor. According to the invention, the position of the glass body can be effectively prevented from deviating, and the second inner conductor can be prevented from moving relative to the glass body.

Description

Technical Field

[0001] The invention relates to the technical field of connectors, and in particular to a sealed cable assembly. Background Art

[0002] Coaxial cables are often used to connect devices or in bus network topologies. In the application process, coaxial cables need to be connected to devices through RF connectors. However, most RF connectors on the market currently have poor high temperature resistance and sealing performance. In high temperature and high humidity environments, water vapor can easily enter the cable, reducing the insulation and withstand voltage indicators of the cable, and reducing the power capacity. In severe cases, it can cause short circuits or even system damage.

[0003] Therefore, some domestic manufacturers have also conducted some research on high-temperature resistant RF connectors. However, the existing high-temperature resistant connectors still have some defects. After experiencing a large change in ambient temperature, the glass beads of the high-temperature resistant connectors are prone to loosening, which in turn causes the inner conductor to loosen. Summary of the invention

[0004] In order to solve the deficiencies of the prior art, the present invention provides a sealed cable assembly. The present invention aims to solve one of the technical problems in the prior art at least to a certain extent.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A sealed cable assembly, comprising a first outer conductor, a second outer conductor, a glass body, a first inner conductor, a second inner conductor, a third inner conductor and a cable outer conductor. The first outer conductor is provided with a first cavity, a second cavity and a third cavity which are connected in sequence and coaxial, and the diameter of the second cavity gradually increases from one end adjacent to the third cavity to the other end; one end of the second outer conductor extends into the third cavity and is seamlessly connected to the first outer conductor, and the second outer conductor is provided with a fourth cavity which runs through both ends thereof; the glass body fills the second cavity; the second inner conductor comprises a first section located in the first cavity, a second section located in the glass body and a third section located in the fourth cavity, a convex ring is provided on the outer wall of the second section, and the second inner conductor and the fourth cavity are both coaxial with the first cavity; the first inner conductor is located in the fourth cavity and connected to the third section; the third inner conductor is located in the first cavity and connected to the first section; the cable outer conductor surrounds the outer side of the second outer conductor and one end is connected to the first outer conductor.

[0007] In some embodiments, the second cavity is in the shape of a truncated cone with a taper of 1:10.

[0008] In some embodiments, the sealed cable assembly also includes a ceramic sealing ring, a first internal thread is provided in the third cavity, the second outer conductor includes a main body and an extension portion, a fourth cavity passes through the main body, the outer diameter of the main body is smaller than the diameter of the third cavity, the extension portion is located at one end of the main body and extends radially outward along the main body, a first external thread matching the first internal thread is provided on the extension portion, the extension portion is screwed into the third cavity, the ceramic sealing ring is sleeved on the main body and is located in the third cavity, and the ceramic sealing ring is away from the glass body relative to the extension portion.

[0009] In some embodiments, a first annular groove is provided on the outer wall of the main body, and a portion of the ceramic sealing ring is sintered in the first annular groove.

[0010] In some embodiments, the cross-sectional shape of the first annular groove is a minor arcuate shape.

[0011] In some embodiments, the first inner conductor includes a tip, a middle section and a tail section connected in sequence, the tip gradually decreases in diameter from one end adjacent to the middle section to the other end of the tip, the tail section has a diameter greater than that of the middle section, and the tail section is connected to the third section.

[0012] In some embodiments, a second internal thread is provided at one end of the tail section adjacent to the glass body, a second external thread matching the second internal thread is provided on the third section, and the third section is threadedly connected to the tail section.

[0013] In some embodiments, a third inner thread is disposed at one end of the third inner conductor adjacent to the glass body, and a third outer thread matching the third inner thread is disposed on the first section.

[0014] In some embodiments, a socket is provided at one end of the third inner conductor away from the glass body, and a groove connected to the socket is provided on the outer wall of the third inner conductor, and the groove extends to the end of the third inner conductor away from the glass body.

[0015] In some embodiments, the sealed cable assembly further comprises a clamping ring, a second annular groove is provided on the outer wall of the first outer conductor, a third annular groove is provided on the inner wall of the cable outer conductor, and the clamping ring is clamped in both the second and third annular grooves.

[0016] Compared with the prior art, the structure of the second cavity in the present invention can ensure that the glass body is firmly fixed and effectively prevent the position of the glass body from being shifted. Moreover, by providing a convex ring on the second inner conductor, the glass body and the second inner conductor can be tightly combined to prevent the second inner conductor from moving relative to the glass body. The present invention has well solved the technical problem of the inner conductor being easy to loose in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 is a cross-sectional view of an embodiment of the present invention.

[0019] Figure 2 yes Figure 1 Section view along line AA.

[0020] Figure 3 FIG. 4 is a half-section view of the first outer conductor in the embodiment of the present invention.

[0021] Figure 4 FIG. 4 is a half-section view of the second outer conductor in the embodiment of the present invention.

[0022] Figure 5 is a cross-sectional view of the first inner conductor in an embodiment of the present invention.

[0023] Figure 6 4 is a half-section view of the second inner conductor in the embodiment of the present invention.

[0024] Figure 7 is a cross-sectional view of the third inner conductor in the embodiment of the present invention.

[0025] The following are the descriptions of the reference numerals:

[0026] In the figure: 1, first outer conductor; 11, first cavity; 12, second cavity; 13, third cavity; 131, first internal thread; 14, second annular groove; 2, second outer conductor; 21, fourth cavity; 22, main body; 221, first annular groove; 23, extension; 231, first outer thread; 3, glass body; 4, first inner conductor; 41, tip; 42, middle section; 43, tail section; 431, second internal thread; 5, second inner conductor; 51, first section; 52, second section; 53, third section; 54, convex ring; 6, third inner conductor; 61, third internal thread; 62, jack; 63, cut groove; 7, cable outer conductor; 71, third annular groove; 8, clamping ring; 9, ceramic sealing ring. DETAILED DESCRIPTION

[0027] The following is a further detailed description of the implementation methods of the present application in conjunction with the accompanying drawings and examples. The detailed descriptions of the following examples and the accompanying drawings are used to exemplarily illustrate the principles of the present application, but cannot be used to limit the scope of the present application. The present application can be implemented in many different forms and is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

[0028] The present application provides these embodiments to make the present application thorough and complete, and to fully express the scope of the present application to those skilled in the art. It should be noted that unless otherwise specifically stated, the relative arrangement of the parts and steps, the composition of the materials, the numerical expressions and the numerical values ​​set forth in these embodiments should be interpreted as being merely exemplary, and not as limiting.

[0029] It should be noted that, in the description of this application, unless otherwise specified, the meaning of "multiple" is greater than or equal to two; the terms "upper", "lower", "left", "right", "inner", "outer", etc., indicating the orientation or positional relationship, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0030] In addition, the words "first", "second" and similar words used in this application do not indicate any order, quantity or importance, but are only used to distinguish different parts. "Vertical" does not mean vertical in the strict sense, but is within the tolerance range. "Parallel" does not mean parallel in the strict sense, but is within the tolerance range. "Include" or "comprising" and similar words mean that the elements before the word include the elements listed after the word, and do not exclude the possibility of including other elements.

[0031] It should also be noted that in the description of this application, unless otherwise clearly specified and limited, the terms "installed", "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. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances. When a specific device is described as being located between a first device and a second device, there may or may not be an intermediate device between the specific device and the first device or the second device.

[0032] All terms used in this application have the same meaning as those understood by those of ordinary skill in the art to which this application belongs, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries, such as general dictionaries, should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology, and should not be interpreted in an idealized or extremely formal sense, unless explicitly defined herein.

[0033] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0034] See also Figure 1-Figure 7 As shown, the present invention provides a sealed cable assembly, which includes a first outer conductor 1, a second outer conductor 2, a glass body 3, a first inner conductor 4, a second inner conductor 5, a third inner conductor 6 and a cable outer conductor 7.

[0035] See also Figure 3 As shown, the first outer conductor 1 is provided with a first cavity 11, a second cavity 12 and a third cavity 13 which are connected and coaxial in sequence. The first cavity 11 extends to the right end surface of the first outer conductor 1, and the third cavity 13 extends to the left end surface of the first outer conductor 1. The diameter of the second cavity 12 gradually increases from one end adjacent to the third cavity 13 to the other end.

[0036] See also Figure 1 As shown, the right end of the second outer conductor 2 extends into the third cavity 13 and is seamlessly connected to the first outer conductor 1, and the second outer conductor 2 is provided with a fourth cavity 21 running through the left and right ends thereof; the glass body 3 is sintered in the second cavity 12 and fills the second cavity 12; the second inner conductor 5 includes a first section 51 located in the first cavity 11, a second section 52 located in the glass body 3, and a third section 53 located in the fourth cavity 21, a convex ring 54 is provided on the outer wall of the second section 52, and the second inner conductor 5 and the fourth cavity 21 are both coaxial with the first cavity 11; the first inner conductor 4 is located in the fourth cavity 21 and connected to the third section 53, and the third inner conductor 6 is located in the first cavity 11 and connected to the first section 51; the cable outer conductor 7 surrounds the outer side of the second outer conductor 2 and one end is connected to the first outer conductor 1.

[0037] In the present invention, the shape of the second cavity 12 is a truncated cone with a taper of 1:10, the shape of the glass body 3 is the same as that of the second cavity 12, and the center of the glass body 3 has a hole for the second inner conductor 5 to pass through. The glass body 3 in the present invention is made by a glass sintering process. Before sintering, the second inner conductor 5 must first be fixed at the target position so that the second inner conductor 5 is coaxial with the first cavity 11 and the convex ring 54 is located in the second cavity 12. The unique shape of the second cavity 12 in the present invention can ensure that the glass body 3 is firmly fixed, effectively preventing the position of the glass body 3 from being offset, and by providing the convex ring 54 on the second inner conductor 5, the glass body 3 and the second inner conductor 5 can be tightly combined to prevent the second inner conductor 5 from moving relative to the glass body 3.

[0038] The structure of the convex ring 54 can be seen in Figure 6 As shown, each convex ring 54 surrounds the second inner conductor 5, and two groups of convex rings 54 are arranged on the outer wall of the second section 52 at intervals, with two or three convex rings 54 forming a group, and the cross-section of the convex ring 54 is a triangle.

[0039] In the present invention, the sealed cable assembly further includes a ceramic sealing ring 9, a first internal thread 131 is provided in the third cavity 13, the second outer conductor 2 includes a main body 22 and an extension 23, the fourth cavity 21 passes through the main body 22, the outer diameter of the main body 22 is smaller than the diameter of the third cavity 13, the extension 23 is located at one end of the main body 22 and extends radially outwardly along the main body 22, the thickness of the extension 23 is smaller than the depth of the third cavity 13, the main body 22 is provided with a first external thread 231 matching the first internal thread 131, the extension 23 is screwed into the third cavity 13, and the extension 23 is connected to the first outer conductor 1 by a thread. The ceramic sealing ring 9 is sleeved on the main body 22 and is located in the third cavity 13, and the ceramic sealing ring 9 is away from the glass body 3 relative to the extension 23.

[0040] During assembly, the extension 23 is first screwed into the deepest part of the third cavity 13, and then the aforementioned ceramic sealing ring 9 is obtained through a sintering process. The outer edge of the ceramic sealing ring 9 is tightly connected to the first outer conductor 1, and the inner edge of the ceramic sealing ring 9 is tightly connected to the second outer conductor 2. In this way, the seal between the first outer conductor 1 and the second outer conductor 2 is achieved. The ceramic sealing ring 9 can withstand high temperatures. Even if the sealed cable assembly is used in an environment of 400°C, the sealing effect of the sealed cable assembly will not fail. The first outer conductor 1 and the second outer conductor 2 in the present invention are connected by a thread. Compared with the interference fit connection method in the prior art, the present invention has lower processing accuracy requirements for the first outer conductor 1 and the second outer conductor 2, so it is helpful to reduce the difficulty of processing and assembly, and also greatly improves the yield rate of the sealed cable assembly.

[0041] After the ceramic sealing ring 9 is made, the outer edge of the ceramic sealing ring 9 is filled in the first internal thread 131, which is conducive to improving the sealing performance and preventing the ceramic sealing ring 9 from falling off from the third cavity 13. In order to further improve the sealing performance of the product and prevent the ceramic sealing ring 9 from falling off, a first annular groove 221 is provided on the outer wall of the main body 22, and a part of the ceramic sealing ring 9 is sintered in the first annular groove 221. In order to facilitate the sintering of the ceramic sealing ring 9 in the first annular groove 221, see Figure 4 As shown, the cross-sectional shape of the first annular groove 221 is a minor arcuate shape.

[0042] See also Figure 1 and Figure 5As shown, the first inner conductor 4 includes a tip 41, a middle section 42 and a tail section 43 connected in sequence, the tip 41 has a diameter that gradually decreases from one end adjacent to the middle section 42 to the other end of the tip 41, in other words, the tip 41 is conical, the diameter of the tail section 43 is larger than the diameter of the middle section 42, and the tail section 43 is connected to the third section 53. A second internal thread 431 is provided at one end of the tail section 43 adjacent to the glass body 3, and a second external thread (not shown in the figure) matching the second internal thread 431 is provided on the third section 53, and the third section 53 is threadedly connected to the tail section 43.

[0043] See also Figure 1 and Figure 7 As shown, the third inner conductor 6 is provided with a third inner thread 61 at one end close to the glass body 3, and the first section 51 is provided with a third outer thread (not shown in the figure) matching the third inner thread 61. The third inner conductor 6 is provided with a plug hole 62 at one end away from the glass body 3, and a groove 63 connected to the plug hole 62 is provided on the outer wall of the third inner conductor 6. The groove 63 extends to the end of the third inner conductor 6 away from the glass body 3, and the length of the groove 63 is not greater than the depth of the plug hole 62.

[0044] In the present invention, by threading the second inner conductor 5 with the first inner conductor 4 and the second inner conductor 5 , it is beneficial to further reduce the difficulty of processing and assembly, and further improve the yield rate of the sealed cable assembly.

[0045] See also Figure 1 and Figure 3 As shown, the sealed cable assembly also includes a clamping ring 8, a second annular groove 14 is provided on the outer wall of the first outer conductor 1, a third annular groove 71 is provided on the inner wall of the cable outer conductor 7, and the clamping ring 8 is clamped in both the second annular groove 14 and the third annular groove 71.

[0046] So far, various embodiments of the present application have been described in detail. In order to avoid obscuring the concept of the present application, some details known in the art are not described. Based on the above description, those skilled in the art can fully understand how to implement the technical solution disclosed herein.

[0047] Although some specific embodiments of the present application have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present application. It should be understood by those skilled in the art that the above embodiments may be modified or some technical features may be replaced by equivalents without departing from the scope and spirit of the present application. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there is no structural conflict.

Claims

1. A sealed cable assembly, characterized in that: include: A first outer conductor (1), wherein a first cavity (11), a second cavity (12) and a third cavity (13) are sequentially connected and coaxially provided therein, wherein the diameter of the second cavity (12) gradually increases from one end adjacent to the third cavity (13) to the other end; A second outer conductor (2), one end of which extends into the third cavity (13) and is seamlessly connected to the first outer conductor (1), and the second outer conductor (2) is provided with a fourth cavity (21) penetrating through both ends thereof; A vitreous body (3), wherein the vitreous body fills the second cavity (12); a second inner conductor (5), comprising a first section (51) located in the first cavity (11), a second section (52) located in the glass body, and a third section (53) located in the fourth cavity (21); a convex ring (54) is provided on the outer wall of the second section (52); and the second inner conductor (5) and the fourth cavity (21) are both coaxial with the first cavity (11); A first inner conductor (4) located in the fourth cavity (21) and connected to the third section (53); a third inner conductor (6) located in the first cavity (11) and connected to the first section (51); as well as The cable outer conductor (7) is wrapped around the outside of the second outer conductor (2) and one end of the cable outer conductor (7) is connected to the first outer conductor (1).

2. The sealed cable assembly according to claim 1, characterized in that: The second cavity is in the shape of a truncated cone with a taper of 1:

10.

3. The sealed cable assembly according to claim 1, characterized in that: The invention also comprises a ceramic sealing ring (9), wherein a first internal thread (131) is provided in the third cavity (13), the second outer conductor comprises a main body (22) and an extension portion (23), the fourth cavity (21) passes through the main body (22), the outer diameter of the main body is smaller than the diameter of the third cavity (13), the extension portion (23) is located at one end of the main body (22) and extends radially outwardly along the main body, the extension portion (23) is provided with a first external thread (231) matching the first internal thread (131), the extension portion (23) is screwed into the third cavity (13), the ceramic sealing ring (9) is sleeved on the main body (22) and is located in the third cavity (13), and the ceramic sealing ring (9) is away from the glass body (3) relative to the extension portion (23).

4. The sealed cable assembly according to claim 3, characterized in that: A first annular groove (221) is provided on the outer wall of the main body (22), and a portion of the ceramic sealing ring is sintered in the first annular groove.

5. The sealed cable assembly according to claim 4, characterized in that: The cross-sectional shape of the first annular groove (221) is a minor arcuate shape.

6. The sealed cable assembly according to any one of claims 1 to 5, characterized in that: The first inner conductor (4) comprises a tip (41), a middle section (42) and a tail section (43) which are connected in sequence; the tip (41) has a diameter which gradually decreases from one end adjacent to the middle section (42) to the other end of the tip; the tail section (43) has a diameter greater than that of the middle section; and the tail section is connected to the third section (53).

7. The sealed cable assembly according to claim 6, characterized in that: The tail section (43) is provided with a second internal thread (431) at one end adjacent to the glass body, the third section (53) is provided with a second external thread matching the second internal thread (431), and the third section is threadedly connected to the tail section.

8. The sealed cable assembly according to any one of claims 1 to 5, characterized in that: The third inner conductor (6) is provided with a third inner thread (61) at one end adjacent to the glass body (3), and the first section (51) is provided with a third outer thread matching the third inner thread (61).

9. The sealed cable assembly according to claim 8, characterized in that: An insertion hole (62) is provided at one end of the third inner conductor (6) away from the glass body, and a groove (63) communicating with the insertion hole is provided on the outer wall of the third inner conductor, and the groove extends to the end of the third inner conductor away from the glass body.

10. The sealed cable assembly according to any one of claims 1 to 5, characterized in that: It also includes a clamping ring. A second ring groove is provided on the outer wall of the first outer conductor, and a third ring groove is provided on the inner wall of the cable outer conductor. The clamping ring is clamped in the second ring groove and the third ring groove at the same time.

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