CN219477051U - Adapter, coaxial connector and coaxial connector assembly - Google Patents

Abstract

The utility model discloses an adapter, a coaxial connector and a coaxial connector assembly. The adapter includes: an outer conductor having a hollow interior; an insulator mounted in the inner cavity of the outer conductor; and a terminal assembly disposed in the inner cavity of the outer conductor. The terminal assembly includes: a floating terminal adapted to be inserted into a first insulator of a first coaxial connector for constituting a center terminal of the first coaxial connector; a fixed terminal axially opposed to the floating terminal and fixed to the insulator for mating with a center terminal of a second coaxial connector; and an elastic member electrically connected between the floating terminal and the fixed terminal to allow the floating terminal to move relative to the fixed terminal. In the present utility model, the center terminal of the first coaxial connector is constituted by the floating terminal in the adapter, and therefore, there is no need to separately provide the center terminal in the first coaxial connector, which can greatly reduce the size of the first coaxial connector.

Description

Adapter, coaxial connector and coaxial connector assembly

Technical Field

The present utility model relates to an adapter for connecting a coaxial connector, a coaxial connector mating with the adapter, and a coaxial connector assembly including the coaxial connector and the adapter.

Background

In the prior art, coaxial connectors typically include an outer conductor, an insulator, and a center terminal. An insulator and a center terminal are disposed in the outer conductor, and the center terminal is fixed to the insulator. An adapter mated with a coaxial connector typically includes a mating outer conductor, an inner insulator, and a mating center terminal. The inner insulator and the counter center terminal are disposed in the counter outer conductor, and the counter center terminal is fixed to the inner insulator.

In the prior art, the center terminal of the coaxial connector generally has a floatable elastic clamping structure for clamping the mating center terminal of the inserted adapter and absorbing the mating error between the coaxial connector and the adapter. However, the elastic clamping structure may cause the central terminal of the coaxial connector to have a large size, and thus the overall coaxial connector to have a large external size, so that the application thereof is greatly limited.

In addition, in the prior art, the outer conductor of the coaxial connector has a spring plate that is in electrical contact with the counter outer conductor of the adapter, and the conventional spring plate is usually of a single cantilever structure and is easily deformed plastically when subjected to a large eccentric force.

Disclosure of Invention

The present utility model is directed to solving at least one of the above-mentioned problems and disadvantages of the prior art.

According to one aspect of the present utility model, an adapter for connecting a coaxial connector is provided. The adapter includes: an outer conductor having a hollow interior; an insulator mounted in the inner cavity of the outer conductor; and a terminal assembly disposed in the inner cavity of the outer conductor. The terminal assembly includes: a floating terminal adapted to be inserted into a first insulator of a first coaxial connector for constituting a center terminal of the first coaxial connector; a fixed terminal axially opposed to the floating terminal and fixed to the insulator for mating with a center terminal of a second coaxial connector; and an elastic member electrically connected between the floating terminal and the fixed terminal to allow the floating terminal to move relative to the fixed terminal.

According to an exemplary embodiment of the utility model, the outer conductor has axially opposite first and second ends, the floating terminal being suspended in the first end of the outer conductor.

According to another exemplary embodiment of the present utility model, the floating terminal has a contact end extending outside the first end of the outer conductor, the contact end being for electrical contact with a circuit board.

According to another exemplary embodiment of the present utility model, the floating terminal further has: a first axial projection axially opposite the contact end; and a first radial projection connected between the first axial projection and the contact end. The first axial projection is inserted into one end of the elastic element, and the first radial projection abuts against an end face of one end of the elastic element.

According to another exemplary embodiment of the utility model, the first axial projection and/or the first radial projection of the floating terminal are welded to the elastic element.

According to another exemplary embodiment of the utility model, the insulator is located between the first end and the second end of the outer conductor; the fixed terminal passes through the insulator and extends into the second end of the outer conductor.

According to another exemplary embodiment of the present utility model, the fixed terminal has a counter-end protruding from the insulator and extending into the second end of the outer conductor, the counter-end being for counter-connection with the central terminal of the second coaxial connector.

According to another exemplary embodiment of the present utility model, the fixing terminal further has a fixing portion which is axially connected to the mating end and is fixed into a through hole on the insulator; and the fixed part is provided with a barb-shaped bulge, and the barb-shaped bulge is in interference fit with the inner wall of the through hole of the insulator.

According to another exemplary embodiment of the present utility model, the fixing terminal further has: a second axial projection axially opposite the mating end; and a second radial protrusion connected between the fixing portion and the second axial protrusion. The second axial projection is inserted into the other end of the elastic member, and the second radial projection abuts against an end face of the other end of the elastic member.

According to another exemplary embodiment of the utility model, the second axial projection and/or the second radial projection of the fixing terminal are welded to the elastic element.

According to another exemplary embodiment of the present utility model, the adapter further comprises: the inner sealing ring is arranged in the outer conductor and sleeved on the root of the opposite end of the fixed terminal, and is extruded between the outer conductor and the fixed terminal so as to realize sealing between the outer conductor and the fixed terminal.

According to another exemplary embodiment of the present utility model, the adapter further comprises: the outer sealing ring is sleeved on the outer part of the outer conductor and is used for being extruded between the outer conductor and the shielding shell so as to realize sealing between the outer conductor and the shielding shell.

According to another exemplary embodiment of the present utility model, the floating terminal and the fixed terminal are in a column shape, and the elastic member is a coil spring, both ends of which are welded to the floating terminal and the fixed terminal, respectively.

According to another aspect of the present utility model, there is provided a coaxial connector comprising: a first outer conductor; and a first insulator installed in the first outer conductor and formed with a central through hole. The coaxial connector is for mating with the adapter. When the coaxial connector is aligned with the adapter, the floating terminal of the adapter is inserted into the central through hole and constitutes the central terminal of the coaxial connector.

According to an exemplary embodiment of the present utility model, when the coaxial connector is aligned with the adapter, the floating terminal passes through the central through hole and protrudes from the bottom of the coaxial connector to be in electrical contact with a circuit board.

According to another exemplary embodiment of the present utility model, the first outer conductor includes: a peripheral wall; and a plurality of resilient structures connected to the peripheral wall. The plurality of elastic structures are located outside the peripheral wall and are distributed at intervals around the peripheral wall, the first outer conductor is used for being inserted into the outer conductor of the adapter, and the elastic structures are used for being in elastic electric contact with the inner wall of the outer conductor of the adapter.

According to another exemplary embodiment of the present utility model, a plurality of windows respectively corresponding to the plurality of elastic structures are formed on the peripheral wall of the first outer conductor. The elastic structure includes: a pair of cantilever portions whose root portions are connected to the peripheral wall and extend obliquely outward from the peripheral wall; a contact portion connected between free ends of the pair of cantilever portions for making electrical contact with an inner wall of an outer conductor of the adapter; and a support arm whose root is connected to the contact portion and extends obliquely from the contact portion toward the inside of the peripheral wall. The support arm is located between the pair of cantilever portions, and a free end of the support arm is slidably supported on an outer surface of the first insulator.

According to another exemplary embodiment of the present utility model, the first outer conductor further comprises a soldering leg connected to the bottom of the peripheral wall for soldering to a circuit board.

According to another exemplary embodiment of the present utility model, a positioning recess is formed at the top of the peripheral wall of the first outer conductor, and a positioning protrusion is formed on the outer surface of the first insulator, the positioning protrusion being engaged with the positioning recess to prevent the first insulator from rotating with respect to the first outer conductor.

According to another exemplary embodiment of the present utility model, an entrance of the central through hole of the first insulator is flared outwardly to guide the floating terminal of the adapter to be inserted into the central through hole.

According to another aspect of the present utility model, there is provided a coaxial connector assembly comprising the adapter and the coaxial connector, the coaxial connector being mated with the adapter.

According to an exemplary embodiment of the present utility model, the coaxial connector assembly further comprises: and the circuit board is used for being electrically connected with the coaxial connector. The bottom of the first outer conductor of the coaxial connector is soldered to the circuit board and the floating terminal of the adapter passes through the first insulator of the coaxial connector and makes electrical contact with the circuit board. The elastic element of the adapter exerts a predetermined elastic force on the floating terminal so that there is a predetermined contact pressure between the floating terminal and the circuit board.

According to another exemplary embodiment of the present utility model, the coaxial connector assembly further comprises: a shield shell in which the coaxial connector, the adapter and the circuit board are accommodated, an outer seal ring of the adapter being pressed between an outer conductor of the adapter and the shield shell to achieve sealing therebetween.

In the foregoing respective exemplary embodiments according to the present utility model, the center terminal of the coaxial connector is constituted with the floating terminal in the adapter, and therefore, there is no need to separately provide the center terminal in the coaxial connector, which can greatly reduce the size of the coaxial connector.

Furthermore, in some of the foregoing exemplary embodiments of the present utility model, the elastic element connected between the fixed terminal and the floating terminal is capable of absorbing a mating error between the adapter and the coaxial connector and applying an elastic force to the floating terminal. Therefore, there is no need to provide a special elastic clamping structure on the floating terminal, which can further reduce the size of the coaxial connector.

Furthermore, in some of the foregoing exemplary embodiments of the present utility model, the elastic structure on the outer conductor of the coaxial connector is a composite elastic structure having a plurality of arms and a plurality of support points, which can improve stress distribution, promote elastic performance of the elastic structure, and ensure that the elastic structure does not undergo plastic deformation.

Other objects and advantages of the present utility model will become apparent from the following description of the utility model with reference to the accompanying drawings, which provide a thorough understanding of the present utility model.

Drawings

Fig. 1 shows a schematic perspective view of a coaxial connector assembly according to an exemplary embodiment of the present utility model;

fig. 2 shows an axial cross-sectional view of a coaxial connector assembly in accordance with an exemplary embodiment of the present utility model;

fig. 3 shows an exploded schematic view of a coaxial connector assembly in accordance with an exemplary embodiment of the present utility model;

fig. 4 shows a schematic perspective view of a terminal assembly of a coaxial connector assembly according to an exemplary embodiment of the present utility model;

fig. 5 shows a schematic perspective view of a coaxial connector of the coaxial connector assembly according to an exemplary embodiment of the utility model;

fig. 6 shows an exploded schematic view of a coaxial connector of the coaxial connector assembly according to an exemplary embodiment of the utility model;

fig. 7 shows a cross-sectional view of a coaxial connector assembly according to an exemplary embodiment of the present utility model, wherein a shield shell is shown.

Detailed Description

The technical scheme of the utility model is further specifically described below through examples and with reference to the accompanying drawings. In the specification, the same or similar reference numerals denote the same or similar components. The following description of embodiments of the present utility model with reference to the accompanying drawings is intended to illustrate the general inventive concept and should not be taken as limiting the utility model.

Furthermore, in the following detailed description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the embodiments of the present disclosure. It may be evident, however, that one or more embodiments may be practiced without these specific details. In other instances, well-known structures and devices are shown in the drawings in order to simplify the drawings.

According to one general technical concept of the present utility model, an adapter for connecting a coaxial connector is provided. The adapter includes: an outer conductor having a hollow interior; an insulator mounted in the inner cavity of the outer conductor; and a terminal assembly disposed in the inner cavity of the outer conductor. The terminal assembly includes: a floating terminal adapted to be inserted into a first insulator of a first coaxial connector for constituting a center terminal of the first coaxial connector; a fixed terminal axially opposed to the floating terminal and fixed to the insulator for mating with a center terminal of a second coaxial connector; and an elastic member electrically connected between the floating terminal and the fixed terminal to allow the floating terminal to move relative to the fixed terminal.

According to another general technical concept of the present utility model, there is provided a coaxial connector including: a first outer conductor; and a first insulator installed in the first outer conductor and formed with a central through hole. The coaxial connector is for mating with the adapter. When the coaxial connector is aligned with the adapter, the floating terminal of the adapter is inserted into the central through hole and constitutes the central terminal of the coaxial connector.

According to another general technical concept of the present utility model, there is provided a coaxial connector assembly including the adapter and the coaxial connector, the coaxial connector being mated with the adapter.

Fig. 1 shows a schematic perspective view of a coaxial connector assembly according to an exemplary embodiment of the present utility model; fig. 2 shows an axial cross-sectional view of a coaxial connector assembly in accordance with an exemplary embodiment of the present utility model; fig. 3 shows an exploded schematic view of a coaxial connector assembly in accordance with an exemplary embodiment of the present utility model; fig. 4 shows a schematic perspective view of a terminal assembly of a coaxial connector assembly according to an exemplary embodiment of the present utility model.

As shown in fig. 1 to 4, in an exemplary embodiment of the present utility model, an adapter 3 is disclosed, the adapter 3 being for mating connection with a coaxial connector 1. The adapter 3 includes: an outer conductor 31, an insulator 32, and terminal assemblies 33, 34, 35. The outer conductor 31 has a hollow inner cavity 301. An insulator 32 is mounted in the inner cavity 301 of the outer conductor 31. Terminal assemblies 33, 34, 35 are disposed in the inner cavity 301 of the outer conductor 31. The terminal assemblies 33, 34, 35 include: a floating terminal 33, a fixed terminal 34, and an elastic member 35.

As shown in fig. 1 to 4, in the illustrated embodiment, the floating terminal 33 is adapted to be inserted into the first insulator 12 of the first coaxial connector 1 for constituting the center terminal of the first coaxial connector 1. The fixed terminal 34 is axially opposite the floating terminal 33 and is fixed to the insulator 32 for mating with a center terminal of a second coaxial connector (not shown). The elastic member 35 is electrically connected between the floating terminal 33 and the fixed terminal 34 to allow the floating terminal 33 to move relative to the fixed terminal 34.

As shown in fig. 1-4, in the illustrated embodiment, the outer conductor 31 has axially opposite first and second ends 311, 312, with the floating terminal 33 suspended in the first end 311 of the outer conductor 31.

As shown in fig. 1-4, in the illustrated embodiment, the floating terminal 33 has a contact end 33a extending outside of the first end 311 of the outer conductor 31, the contact end 33a being for electrical contact with the circuit board 4.

As shown in fig. 1 to 4, in the illustrated embodiment, the floating terminal 33 further has: a first axial projection 33b and a first radial projection 33c. The first axial projection 33b is axially opposite the contact end 33 a. The first radial protrusion 33c is connected between the first axial protrusion 33b and the contact end 33 a. The first axial projection 33b is inserted into one end of the elastic element 35, and the first radial projection 33c abuts on an end face of one end of the elastic element 35.

As shown in fig. 1 to 4, in the illustrated embodiment, the first axial protrusion 33b and/or the first radial protrusion 33c of the floating terminal 33 are welded to the elastic element 35, for example, by laser welding or ultrasonic welding.

As shown in fig. 1-4, in the illustrated embodiment, the insulator 32 is located between the first end 311 and the second end 312 of the outer conductor 31. The fixed terminal 34 passes through the insulator 32 and extends into the second end 312 of the outer conductor 31.

As shown in fig. 1-4, in the illustrated embodiment, the fixed terminal 34 has a mating end 34a extending from the insulator 32 and into the second end 312 of the outer conductor 31, the mating end 34a being for mating connection with the center terminal of the second coaxial connector.

As shown in fig. 1 to 4, in the illustrated embodiment, the fixed terminal 34 further has a fixed portion 34f, and the fixed portion 34f is axially connected to the mating end 34a and fixed into a through hole in the insulator 32. A barb-like projection 34e is formed on the fixing portion 34f, and the barb-like projection 34e is interference-fitted with the inner wall of the through hole of the insulator 32.

As shown in fig. 1 to 4, in the illustrated embodiment, the fixed terminal 34 further has a second axial convex portion 34b and a second radial convex portion 34c. The second axial projection 34b is axially opposite the mating end 34 a. The second radial protrusion 34c is connected between the fixed portion 34f and the second axial protrusion 34 b. The second axial projection 34b is inserted into the other end of the elastic member 35, and the second radial projection 34c abuts on the end face of the other end of the elastic member 35.

As shown in fig. 1 to 4, in the illustrated embodiment, the second axial projection 34b and/or the second radial projection 34c of the fixed terminal 34 are welded to the elastic element 35, for example, by laser welding or ultrasonic welding.

As shown in fig. 1 to 4, in the illustrated embodiment, the adapter 3 further comprises an inner sealing ring 36, the inner sealing ring 36 being disposed inside the outer conductor 31 and being fitted over the root of the counter-end 34a of the fixed terminal 34. An inner seal ring 36 is pressed between the outer conductor 31 and the fixed terminal 34 to achieve a seal therebetween.

As shown in fig. 1 to 4, in the illustrated embodiment, the adapter 3 further comprises an outer sealing ring 37, the outer sealing ring 37 being fitted over the outside of the outer conductor 31. The outer seal ring 37 is intended to be pressed between the outer conductor 31 and the shield shell 5 (see fig. 7) to achieve a seal between the two.

As shown in fig. 1 to 4, in the illustrated embodiment, the floating terminal 33 and the fixed terminal 34 are in a column shape, and the elastic member 35 is a coil spring whose both ends are welded to the floating terminal 33 and the fixed terminal 34, respectively.

Fig. 5 shows a schematic perspective view of a coaxial connector 1 of a coaxial connector assembly according to an exemplary embodiment of the utility model; fig. 6 shows an exploded schematic view of a coaxial connector 1 of a coaxial connector assembly according to an exemplary embodiment of the utility model.

As shown in fig. 1 to 6, in another exemplary embodiment of the present utility model, a coaxial connector 1 is also disclosed. The coaxial connector 1 includes: a first outer conductor 11 and a first insulator 12. The first insulator 12 is mounted in the first outer conductor 11 and is formed with a center through hole 120. The coaxial connector 1 is for mating with the adapter 3. When the coaxial connector 1 is aligned with the adapter 3, the floating terminal 33 of the adapter 3 is inserted into the center through hole 120 and constitutes the center terminal of the coaxial connector 1.

As shown in fig. 1 to 6, in the illustrated embodiment, when the coaxial connector 1 is aligned with the adapter 3, the floating terminal 33 passes through the center through hole 120 and protrudes from the bottom of the coaxial connector 1 to be in electrical contact with the circuit board 4.

As shown in fig. 1 to 6, in the illustrated embodiment, the first outer conductor 11 includes: a peripheral wall 101 and a plurality of resilient structures 110. A plurality of elastic structures 110 are connected to the peripheral wall 101. A plurality of resilient structures 110 are located on the exterior of the peripheral wall 101 and are spaced around the peripheral wall 101. The first outer conductor 11 is for insertion into the outer conductor 31 of the adapter 3 and the resilient structure 110 is for resilient electrical contact with the inner wall of the outer conductor 31 of the adapter 3.

As shown in fig. 1 to 6, in the illustrated embodiment, a plurality of windows 102 corresponding to the plurality of elastic structures 110, respectively, are formed on the peripheral wall 101 of the first outer conductor 11. The elastic structure 110 includes: a pair of cantilever portions 111, a contact portion 112, and a support arm 113. The root portions of the pair of cantilever portions 111 are connected to the peripheral wall 101 and extend obliquely outward from the peripheral wall 101. The contact portion 112 is connected between the free ends of the pair of cantilever portions 111 for electrical contact with the inner wall of the outer conductor 31 of the adapter 3. The root of the support arm 113 is connected to the contact portion 112 and extends obliquely from the contact portion 112 toward the inside of the peripheral wall 101. The support arm 113 is located between the pair of cantilever portions 111, and a free end 113a of the support arm 113 is slidably supported on the outer surface of the first insulator 12.

As shown in fig. 1 to 6, in the illustrated embodiment, the first outer conductor 11 further includes a soldering foot 116, and the soldering foot 116 is connected to the bottom of the peripheral wall 101 for soldering to the circuit board 4.

As shown in fig. 1 to 6, in the illustrated embodiment, a positioning recess 11a is formed at the top of the peripheral wall 101 of the first outer conductor 11, and a positioning projection 12a is formed on the outer surface of the first insulator 12, the positioning projection 12a being engaged with the positioning recess 11a to prevent the first insulator 12 from rotating relative to the first outer conductor 11.

As shown in fig. 1 to 6, in the illustrated embodiment, the entrance of the central through hole 120 of the first insulator 12 is flared outwardly to guide the insertion of the floating terminal 33 of the adapter 3 into the central through hole 120.

Fig. 7 shows a cross-sectional view of a coaxial connector assembly according to an exemplary embodiment of the present utility model, wherein a shield shell 5 is shown.

In another exemplary embodiment of the present utility model, as shown in fig. 1-7, a coaxial connector assembly is also disclosed. The coaxial connector assembly includes: an adapter 3 and a coaxial connector 1. The coaxial connector 1 is coupled with the adapter 3 in a mating manner.

As shown in fig. 1-7, in the illustrated embodiment, the coaxial connector assembly further comprises a circuit board 4, the circuit board 4 being for electrical connection with the coaxial connector 1. The bottom of the first outer conductor 11 of the coaxial connector 1 is soldered to the circuit board 4 and the floating terminal 33 of the adapter 3 passes through the first insulator 12 of the coaxial connector 1 and is in electrical contact with the circuit board 4. The elastic member 35 of the adapter 3 exerts a predetermined elastic force on the floating terminal 33 so that there is a predetermined contact pressure between the floating terminal 33 and the circuit board 4.

As shown in fig. 1 to 7, in the illustrated embodiment, the coaxial connector assembly further comprises a shield shell 5. The coaxial connector 1, the adapter 3, and the circuit board 4 are accommodated in a shield case 5. The outer seal ring 37 of the adapter 3 is pressed between the outer conductor 31 of the adapter 3 and the shield shell 5 to achieve a seal therebetween.

It will be appreciated by those skilled in the art that the above-described embodiments are exemplary and that modifications may be made to the embodiments described in various embodiments without structural or conceptual aspects and that these variations may be resorted to without departing from the scope of the utility model.

Although the present utility model has been described with reference to the accompanying drawings, the examples disclosed in the drawings are intended to illustrate preferred embodiments of the utility model and are not to be construed as limiting the utility model.

Although a few embodiments of the present general inventive concept have been shown and described, it would be appreciated by those skilled in the art that changes may be made in these embodiments without departing from the principles and spirit of the general inventive concept, the scope of which is defined in the claims and their equivalents.

It should be noted that the word "comprising" does not exclude other elements or steps, and that the word "a" or "an" does not exclude a plurality. In addition, any element numbers of the claims should not be construed as limiting the scope of the utility model.

Claims (23)

1. An adapter for connecting coaxial connectors, characterized in that the adapter (3) comprises:

an outer conductor (31) having a hollow inner cavity (301);

an insulator (32) mounted in the inner cavity (301) of the outer conductor (31); and

a terminal assembly disposed in an inner cavity (301) of the outer conductor (31),

the terminal assembly includes:

a floating terminal (33) adapted to be inserted into a first insulator (12) of a first coaxial connector (1) for constituting a center terminal of the first coaxial connector (1);

-a fixed terminal (34) axially opposite to said floating terminal (33) and fixed to said insulator (32) for mating with a central terminal of a second coaxial connector; and

-an elastic element (35) electrically connected between the floating terminal (33) and the fixed terminal (34) to allow the floating terminal (33) to move with respect to the fixed terminal (34).

2. The adapter according to claim 1, wherein:

the outer conductor (31) has axially opposite first (311) and second (312) ends, the floating terminal (33) being suspended in the first end (311) of the outer conductor (31).

3. The adapter according to claim 2, wherein:

the floating terminal (33) has a contact end (33 a) extending outside the first end (311) of the outer conductor (31), the contact end (33 a) being for electrical contact with a circuit board (4).

4. An adapter according to claim 3, characterized in that:

the floating terminal (33) further has:

a first axial projection (33 b) axially opposite said contact end (33 a); and

a first radial projection (33 c) connected between said first axial projection (33 b) and said contact end (33 a),

the first axial projection (33 b) is inserted into one end of the elastic element (35), and the first radial projection (33 c) abuts against an end face of one end of the elastic element (35).

5. The adapter of claim 4, wherein:

the first axial projection (33 b) and/or the first radial projection (33 c) of the floating terminal (33) are welded to the elastic element (35).

6. The adapter according to claim 2, wherein:

the insulator (32) is located between a first end (311) and a second end (312) of the outer conductor (31);

the fixed terminal (34) passes through the insulator (32) and extends into the second end (312) of the outer conductor (31).

7. The adapter according to claim 6, wherein:

the fixed terminal (34) has a counter-end (34 a) protruding from the insulator (32) and extending into the second end (312) of the outer conductor (31), the counter-end (34 a) being for counter-connection with the central terminal of the second coaxial connector.

8. The adapter of claim 7, wherein:

the fixed terminal (34) further has a fixed portion (34 f), the fixed portion (34 f) being axially connected to the mating end (34 a) and fixed into a through hole on the insulator (32);

a barb-like projection (34 e) is formed on the fixing portion (34 f), and the barb-like projection (34 e) is interference-fitted with the inner wall of the through hole of the insulator (32).

9. The adapter of claim 8, wherein:

the fixed terminal (34) further has:

a second axial projection (34 b) axially opposite the mating end (34 a); and

a second radial protrusion (34 c) connected between the fixing portion (34 f) and the second axial protrusion (34 b),

the second axial projection (34 b) is inserted into the other end of the elastic element (35), and the second radial projection (34 c) abuts on the end face of the other end of the elastic element (35).

10. The adapter according to claim 9, wherein:

the second axial projection (34 b) and/or the second radial projection (34 c) of the fixing terminal (34) are welded to the elastic element (35).

11. The adapter of claim 7, further comprising:

an inner seal ring (36) which is arranged inside the outer conductor (31) and sleeved on the root of the opposite end (34 a) of the fixed terminal (34),

the inner seal ring (36) is pressed between the outer conductor (31) and the fixed terminal (34) to achieve a seal therebetween.

12. The adapter of claim 11, further comprising:

an outer seal ring (37) sleeved on the outer part of the outer conductor (31),

the outer seal ring (37) is used for being pressed between the outer conductor (31) and the shielding shell (5) so as to realize sealing between the outer conductor and the shielding shell.

13. The adapter according to any one of claims 1-12, wherein:

the floating terminal (33) and the fixed terminal (34) are columnar, and the elastic element (35) is a coil spring, and both ends of the coil spring are welded to the floating terminal (33) and the fixed terminal (34), respectively.

14. A coaxial connector, comprising:

a first outer conductor (11); and

a first insulator (12) installed in the first outer conductor (11) and formed with a center through hole (120),

the coaxial connector (1) is intended to mate with an adapter (3) according to any one of claims 1-13,

when the coaxial connector (1) is mated with the adapter (3), a floating terminal (33) of the adapter (3) is inserted into the center through hole (120) and constitutes a center terminal of the coaxial connector (1).

15. The coaxial connector of claim 14, wherein:

when the coaxial connector (1) is aligned with the adapter (3), the floating terminal (33) passes through the central through hole (120) and protrudes from the bottom of the coaxial connector (1) to be in electrical contact with a circuit board (4).

16. The coaxial connector of claim 14, wherein:

the first outer conductor (11) includes:

a peripheral wall (101); and

a plurality of elastic structures (110) connected to the peripheral wall (101),

the plurality of elastic structures (110) are positioned outside the peripheral wall (101) and are distributed at intervals around the peripheral wall (101),

the first outer conductor (11) is for insertion into an outer conductor (31) of the adapter (3), and the resilient structure (110) is for resilient electrical contact with an inner wall of the outer conductor (31) of the adapter (3).

17. The coaxial connector of claim 16, wherein:

a plurality of windows (102) corresponding to the plurality of elastic structures (110) are formed on the peripheral wall (101) of the first outer conductor (11);

the elastic structure (110) comprises:

a pair of cantilever portions (111) whose root portions are connected to the peripheral wall (101) and extend obliquely outward from the peripheral wall (101);

a contact portion (112) connected between the free ends of the pair of cantilever portions (111) for making electrical contact with the inner wall of the outer conductor (31) of the adapter (3); and

a support arm (113) whose root is connected to the contact portion (112) and extends obliquely from the contact portion (112) toward the inside of the peripheral wall (101),

the support arm (113) is located between the pair of cantilever portions (111), and a free end (113 a) of the support arm (113) is slidably supported on an outer surface of the first insulator (12).

18. The coaxial connector of claim 16, wherein:

the first outer conductor (11) further comprises a welding foot (116), and the welding foot (116) is connected with the bottom of the peripheral wall (101) and used for being welded to the circuit board (4).

19. The coaxial connector of claim 16, wherein:

a positioning recess (11 a) is formed at the top of the peripheral wall (101) of the first outer conductor (11), and a positioning projection (12 a) is formed on the outer surface of the first insulator (12), the positioning projection (12 a) being engaged with the positioning recess (11 a) to prevent the first insulator (12) from rotating relative to the first outer conductor (11).

20. The coaxial connector of any one of claims 14-19, wherein:

the entrance of the central through hole (120) of the first insulator (12) is flared outward to guide the floating terminal (33) of the adapter (3) to be inserted into the central through hole (120).

21. A coaxial connector assembly, comprising:

the adapter (3) of any one of claims 1-13; and

the coaxial connector (1) of any of claims 14-20, mated with the adapter (3).

22. The coaxial connector assembly of claim 21, further comprising:

a circuit board (4) for electrical connection with the coaxial connector (1),

the bottom of the first outer conductor (11) of the coaxial connector (1) is soldered to the circuit board (4), the floating terminal (33) of the adapter (3) passes through the first insulator (12) of the coaxial connector (1) and is in electrical contact with the circuit board (4),

the elastic element (35) of the adapter (3) exerts a predetermined elastic force on the floating terminal (33) such that there is a predetermined contact pressure between the floating terminal (33) and the circuit board (4).

23. The coaxial connector assembly of claim 22, further comprising:

a shield shell (5), the coaxial connector (1), the adapter (3) and the circuit board (4) being accommodated in the shield shell (5),

an outer sealing ring (37) of the adapter (3) is pressed between an outer conductor (31) of the adapter (3) and the shielding shell (5) to achieve a seal between the two.