Radio frequency coaxial connector

Abstract

The utility model discloses a radio frequency coaxial connector which comprises a male end and a female end. The male end comprises an outer cylinder, an inner cylinder sleeved with the outer cylinder, a first insulating part arranged between the inner cylinder and the outer cylinder, and an elastic part and a center pin which are arranged in the inner cylinder, the center pin is arranged in the inner cylinder in a sliding manner and extends out of the end parts of the outer cylinder and the outer cylinder, the elastic part is arranged in the axial direction of the inner cylinder, and the elastic part ejects the center pin out of the end parts of the outer cylinder and the inner cylinder; the female end is used for being installed on an external circuit board and comprises an insertion cylinder, the insertion cylinder can be connected with the outer cylinder in an inserted mode, and after the female end is installed on the circuit board and the insertion cylinder is connected with the outer cylinder in an inserted mode, the center pin makes contact with a feed point on the circuit board. According to the radio frequency coaxial connector, the center pin of the male end is in direct contact with the circuit board, a center pin does not need to be arranged on the female end to be connected with the male end, the structure is simple, the center pin of the male end adopts an elastic structure and can be in elastic contact with the circuit board, and the electrical performance is more stable.

Description

Technical Field

[0001] This application belongs to the technical field of connectors, and particularly relates to a radio frequency coaxial connector. Background Art

[0002] Radio frequency board-to-board connectors are widely used for radio frequency signal connection between a radio frequency power amplifier PCB and a radio frequency transceiver PCB. These radio frequency board-to-board connectors are provided in sets of one per channel, including two female head PCB connectors and one male head connector. The two ends of the male head connector are respectively connected to the two female head PCB connectors. The male end and the female end are respectively provided with male pins and female pins, and signal transmission is achieved through the connection of the male pins and the female pins. In the existing radio frequency board-to-board connectors, center pins need to be provided at both the male end and the female end, and the structure is complex. Utility Model Content

[0003] The purpose of this application is to provide a radio frequency coaxial connector to solve the deficiencies of the prior art.

[0004] To achieve the above purpose, this application provides the following technical solutions:

[0005] A radio frequency coaxial connector includes a male end and a female end; the male end includes an outer cylinder, an inner cylinder sleeved in the outer cylinder, a first insulating member disposed between the inner cylinder and the outer cylinder, and an elastic member and a center pin disposed in the inner cylinder. The center pin is slidably disposed in the inner cylinder and extends out of the outer cylinder and the end of the outer cylinder. The elastic member is arranged along the axial direction of the inner cylinder, and the elastic member ejects the center pin towards the outer cylinder and the end of the inner cylinder.

[0006] The female end is used for mounting to an external circuit board and includes a plug-in cylinder. The plug-in cylinder can be plugged into the outer cylinder. When the female end is mounted to the circuit board and the plug-in cylinder is plugged into the outer cylinder, the center pin contacts the feed point on the circuit board.

[0007] In some embodiments, a blind hole extending from the end face of the inner cylinder towards the center of the inner cylinder is provided at the end of the inner cylinder. The center pin and the elastic member are disposed in the blind hole. One end of the elastic member abuts against the bottom of the blind hole, and the other end of the elastic member abuts against the center pin; or

[0008] A through hole penetrating the inner cylinder is provided on the inner cylinder. The center pin and the elastic member are disposed in the through hole. The elastic member is provided with the center pin at both ends, and both ends of the elastic member respectively abut against the center pins located at both ends of the elastic member.

[0009] In some embodiments, a limiting portion is provided at the end of the inner cylinder, and the limiting portion limits the center pin in the blind hole or the through hole.

[0010] In some embodiments, the first insulating member is an insulating ring, the outer sidewall of the insulating ring abuts against the outer cylinder, and the inner sidewall of the insulating ring abuts against the inner cylinder.

[0011] In some embodiments, the insulating ring is provided with a through hole axially arranged.

[0012] In some embodiments, the male terminal further includes a second insulating member, the second insulating member is arranged in the plugging cylinder, the second insulating member is provided with a jack, and the jack is arranged corresponding to the feeding point on the circuit board so that the center pin can pass through the jack and contact the feeding point.

[0013] In some embodiments, the plugging cylinder is provided with a clamping portion, and the clamping portion is a clamping convex formed by the sidewall of the plugging cylinder protruding towards the inside of the plugging cylinder.

[0014] In some embodiments, the plugging cylinder is provided with a slit extending axially from the end face of the plugging end of the plugging cylinder.

[0015] In some embodiments, the center pins are arranged at both ends of the inner cylinder so that the male terminal can cooperate with two female terminals.

[0016] The beneficial effects of the present application are as follows: The center pin of the male terminal of the radio frequency coaxial connector directly contacts the circuit board, and there is no need to arrange a center pin on the female terminal to connect with the male terminal, which simplifies the structure. Moreover, the center pin of the male terminal adopts an elastic structure and elastically abuts against the circuit board, with more stable electrical performance, improved yaw tolerance, and at the same time, the application frequency can also be increased. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The following drawings in the description are only some embodiments. For those of ordinary skill in the art, other drawings can be obtained according to these drawings without creative efforts. In the drawings:

[0018] Figure 1 is a schematic diagram of the overall structure of the radio frequency coaxial connector in the embodiment of the present application;

[0019] Figure 2 is a schematic diagram of the exploded structure of the radio frequency coaxial connector in the embodiment of the present application;

[0020] Figure 3 is a schematic diagram of the cross-sectional structure of the radio frequency coaxial connector in the embodiment of the present application;

[0021] Figure 4 is a schematic diagram of the structure of the male terminal in the embodiment of the present application;

[0022] Figure 5 is a schematic diagram of the cross-sectional structure of the male terminal in the embodiment of the present application;

[0023] Figure 6 is Figure 5 An enlarged schematic view of part A in

[0024] Figure 7 A schematic structural view of the female end in the embodiment of the present application;

[0025] Figure 8 A schematic cross-sectional structural view of the female end in the embodiment of the present application.

[0026] In the attached drawings, the list of components represented by each reference numeral is as follows:

[0027] 10, Radio frequency coaxial connector;

[0028] 100, Male end; 110, Outer cylinder; 120, Elastic member; 130, Center pin; 140, Inner cylinder; 141, Blind hole; 142, Limiting portion; 150, First insulating member; 151, Through hole;

[0029] 200, Female end; 220, Insertion cylinder; 221, Ear piece; 222, Elastic clamping portion; 223, Slit; 230, Second insulating member; 231, Jack; 232, Limiting step surface;

[0030] 300, Circuit board; 301, Feed point. Specific embodiments

[0031] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0032] The embodiment of the present application provides a radio frequency coaxial connector. As Figures 1 to 3 shown, the radio frequency coaxial connector 10 includes a male end 100 and a female end 200. As Figure 5As shown in the figure, the male terminal 100 includes an outer cylinder 110, an inner cylinder 140, a first insulating member 150, an elastic member 120, and a center pin 130. The inner cylinder 140 is sleeved in the outer cylinder 110, and a first insulating member 150 is arranged between the inner cylinder 140 and the outer cylinder 110 to insulate the inner cylinder 140 and the outer cylinder 110. The elastic member 120 and the center pin 130 are both arranged in the inner cylinder 140. Among them, the center pin 130 is slidably arranged in the inner cylinder 140, and the center pin 130 extends from the ends of the inner cylinder 140 and the outer cylinder 110 to be connected to an external circuit board 300. The elastic member 120 is arranged along the axial direction of the inner cylinder 140, and the elastic member 120 can push the center pin 130 out towards the ends of the inner cylinder 140 and the outer cylinder 110, so as to push the center pin 130 tightly against the circuit board 300 to ensure the reliability of the connection.

[0033] Reference Figure 7 and Figure 8 , the female terminal 200 is used to be installed on the external circuit board 300. The female terminal 200 includes a plug-in cylinder 220. The plug-in cylinder 220 is used to be plugged into the outer cylinder 110 of the male terminal 100, so as to fix the male terminal 100 on the circuit board 300. As Figure 8 shown, a feeding point 301 is arranged within the range of the circuit board 300 inside the plug-in cylinder 220. When the female terminal 200 is installed on the circuit board 300 and the plug-in cylinder 220 of the female terminal 200 is plugged into the outer cylinder 110 of the male terminal 100, the center pin 130 of the male terminal 100 contacts the feeding point 301 on the circuit board 300. As Figure 3 shown, communication connection is realized. And under the action of the elastic member 120, the center pin 130 elastically contacts the feeding point 301, with higher connection reliability and more stable electrical performance. The elastic member 120 can be a spring or other types of elastic members 120.

[0034] In the embodiment of the present application, the center pin 130 of the male terminal 100 directly contacts the feeding point 301 on the circuit board 300, without setting a center pin 130 on the female terminal 200 to connect with the male terminal 100, which simplifies the structure and saves the material cost. And the center pin 130 of the male terminal 100 adopts an elastic structure, and an elastic member 120 is arranged in the male terminal 100. The elastic member 120 pushes the center pin 130 tightly against the feeding point 301 of the circuit board 300, so that the center pin 130 elastically contacts the feeding point 301 of the circuit board 300, making the electrical performance more stable, improving the yaw tolerance, and at the same time increasing the application frequency.

[0035] It can be understood that the first insulating member 150 can adopt insulating materials such as plastic and rubber. The inner cylinder 140, the outer cylinder 110, the center pin 130, and the plug-in cylinder 220 are made of conductive materials. As Figure 5As shown, since the diameter of the inner cylinder 140 is smaller than that of the outer cylinder 110, installing the center pin 130 and the elastic member 120 inside the inner cylinder 140 can provide a better guiding effect for the center pin 130, making the center pin 130 more stable during sliding and avoiding skewing of the center pin 130. At the same time, the structure of setting the inner cylinder 140 and the outer cylinder 110 also facilitates insulation between the center pin 130 and the outer cylinder 110, and only a first insulating member 150 needs to be provided between the inner cylinder 140 and the outer cylinder 110.

[0036] Continue to refer to Figure 5 , in an embodiment, a blind hole 141 is provided at the end of the inner cylinder 140. The blind hole 141 extends from the end face of the inner cylinder 140 towards the center of the inner cylinder 140, or it can be said that the blind hole 141 extends along the axial direction of the inner cylinder 140 from the end face of the inner cylinder 140. As Figure 5 shown, the center pin 130 and the elastic member 120 are arranged in the blind hole 141. One end of the center pin 130 is located in the blind hole 141, and the other end extends out of the blind hole 141. One end of the elastic member 120 abuts against the bottom of the blind hole 141, and the other end of the elastic member 120 abuts against the center pin 130. The center pin 130 can move along the hole wall of the blind hole 141 to achieve elastic expansion and contraction. In the embodiment of the present application, as Figure 5 shown, since center pins 130 need to be provided at both ends of the male end 100, therefore, as Figure 5 shown, blind holes 141 are provided at both ends of the inner cylinder 140, and the elastic member 120 and the center pin 130 are arranged in the blind holes 141.

[0037] In other alternative embodiments, through holes penetrating the inner cylinder 140 can also be provided on the inner cylinder 140 to install the center pin 130 and the elastic member 120. The center pin 130 and the elastic member 120 are installed in the through holes on the inner cylinder 140. The elastic member 120 is arranged in the middle of the through hole, and center pins 130 are provided at both ends of the through hole. Both ends of the elastic member 120 respectively abut against the center pins 130 located at both ends of the elastic member 120, and the center pins 130 are pressed tightly against the circuit boards 300 at both ends.

[0038] Figure 6 is Figure 5 the enlarged view of part A in Figure 6 . Refer to Figure 6 , a limiting portion 142 is provided at the end of the inner cylinder 140. The limiting portion 142 can limit the center pin 130 in the blind hole 141 or the through hole, preventing the center pin 130 from coming out of the blind hole 141. Specifically, as Figure 6 shown, the limiting portion 142 can be a flanging formed by inverting the end of the inner cylinder 140. Of course, in other alternative embodiments, the limiting portion 142 can also be other limiting structures, which are not limited herein.

[0039] In an embodiment, as Figure 5As shown, the first insulating member 150 is an insulating ring. The outer sidewall of the insulating ring 150 abuts against the outer cylinder 110, and the inner sidewall of the insulating ring 150 abuts against the inner cylinder 140, thereby separating the outer cylinder 110 from the inner cylinder 140 and achieving insulation between the outer cylinder 110 and the inner cylinder 140.

[0040] As Figure 5 shown, there are two insulating rings 150, and the two insulating rings 150 are respectively arranged at the upper and lower ends of the inner cylinder 140. Arranging the insulating rings 150 at both the upper and lower ends of the inner cylinder 140 can better support the inner cylinder 140 in the outer cylinder 110. In other embodiments, the number of insulating rings 150 can be more than two, and can also be multiple, such as three, four, etc.

[0041] As Figure 5 and Figure 6 shown, a through hole 151 is arranged on the insulating ring 150 along the axial direction. A cavity b is formed by enclosing between the insulating ring 150, the outer cylinder 110 and the inner cylinder 140. After the through hole 151 is arranged on the insulating ring 150, the through hole 151 can communicate the cavity b with the outside, keeping the pressure in the cavity b the same as the external atmospheric pressure, and avoiding the influence on the connector caused by the air pressure in the cavity b being higher or lower than the atmospheric pressure. Keeping the pressure in the cavity b the same as the external atmospheric pressure also makes it more convenient to install the insulating ring 150, and avoids the air pressure in the cavity b being too high due to compressing the air in the cavity b when installing the insulating ring, resulting in the insulating ring 150 not being installed in place. Multiple through holes 151 can be arranged as needed.

[0042] As Figure 5 shown, a plugging cavity c is formed at the end of the outer cylinder 110, and the plugging cavity c is used to receive the plugging cylinder 220 of the female end 200. The plugging cavity c is formed by making the end of the outer cylinder 110 extend a distance d longer than the end of the inner cylinder 140. The end of the outer cylinder 110 extending a distance d longer than the end of the inner cylinder 140 enables the outer cylinder 110 to have enough length d to cooperate with the plugging cylinder 220 of the female end 200, ensuring the connection strength between the outer cylinder 110 and the plugging cylinder 220 of the female end 200.

[0043] As Figure 8 shown, in one embodiment, the female end 200 further includes a second insulating member 230. The second insulating member 230 is arranged in the plugging cylinder 220, and a jack 231 is arranged on the second insulating member 230. The jack 231 is arranged corresponding to the feeding point 301 on the circuit board 300, so that the center pin 130 can pass through the jack 231 and contact the feeding point 301. As Figure 3As shown, after the female terminal 200 is installed on the circuit board 300, the feeding point 301 on the circuit board 300 is located at the bottom of the jack 231. After the center pin 130 is inserted into the jack 231, it can contact the feeding point 301 at the bottom of the jack 231. In the embodiment of the present application, the second insulating member 230 can also be cancelled. Since the center pin is not required to be provided on the female terminal 200 in the embodiment of the present application, and there is no need to provide an insulating member to separate the center pin of the female terminal 200 from the insertion cylinder 220, therefore, the use of the second insulating member 230 can also be cancelled. It can be seen that in the embodiment of the present application, the method of directly contacting the center pin 130 of the male terminal 100 described above with the circuit board 300 of the female terminal 200 is adopted, which can not only cancel the center pin 130 of the female terminal 200, but also cancel the second insulating member 230 of the female terminal 200, greatly simplifying the structure.

[0044] Reference Figure 7 , the insertion cylinder 220 is made of metal. An ear piece 221 is provided at one end of the insertion cylinder 220 connected to the circuit board 300, and the insertion cylinder 220 is welded to the circuit board 300 through the ear piece 221. Of course, the insertion cylinder 220 can also be connected to the circuit board 300 by other connection methods. Multiple ear pieces 221 can be provided, and the multiple ear pieces 221 are arranged at intervals along the circumferential direction of the insertion cylinder 220.

[0045] In one embodiment, as Figure 7 and Figure 8 shown, an elastic clamping portion 222 is formed by the inner wall of the insertion cylinder 220 being recessed inward, and the elastic clamping portion 222 can tightly clamp the outer cylinder 110 of the male terminal 100. As Figure 8 shown, after the inner wall of the insertion cylinder 220 is recessed inward, an arc-shaped protrusion is formed on the inner side of the insertion cylinder 220, and an arc-shaped depression is formed on the outer side of the insertion cylinder 220. The arc-shaped protrusion can clamp the outer cylinder 110 of the male terminal 100.

[0046] As Figure 7 shown, a slit 223 extending axially along the end face of the insertion end of the insertion cylinder 220 is provided on the insertion cylinder 220. After the slit 223 is provided, the side wall of the insertion cylinder 220 is more elastic, facilitating the clamping of the outer cylinder 110. Multiple slits 223 can be provided, and the multiple slits 223 are arranged at intervals along the circumferential direction of the insertion cylinder 220.

[0047] As Figure 8 shown, a limiting step surface 232 is provided on the second insulating member 230 of the female terminal 200. Combining Figure 3 and Figure 8 , the limiting step surface 232 can axially limit the outer cylinder 110 of the male terminal 100 to prevent the outer cylinder 110 from being inserted onto the circuit board 300.

[0048] In the embodiment of the present application, as Figure 3As shown, a male terminal 100 is engaged with two female terminals 200, and both ends of the male terminal 100 are connected to the female terminals 200. As Figure 5 shown, center pins 130 are provided at both ends of the outer cylinder 110 of the male terminal 100, so that both ends of the male terminal 100 can be engaged with the female terminals 200.

[0049] In the description of the present application, unless otherwise clearly specified and limited, the terms "connected" and "connection" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral body; it may be directly connected, or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the meanings of the above terms in the present application can be understood according to specific circumstances.

[0050] In the description of this embodiment, the orientation or positional relationship terms such as "upper", "lower", "front", and "rear" are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present application. The terms "first" and "second" are only used for distinction in description and have no special meaning.

[0051] The above-described embodiments only express the implementation manners of the present application, and the description is relatively specific and detailed, but it should not be construed as a limitation to the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the appended claims.

Claims

1. A radio frequency coaxial connector, characterized in that: It comprises a male end and a female end; the male end comprises an outer cylinder, an inner cylinder sleeved in the outer cylinder, a first insulating member arranged between the inner cylinder and the outer cylinder, and an elastic member and a center needle arranged in the inner cylinder, the center needle is slidably arranged in the inner cylinder and extends out of the outer cylinder and the end of the outer cylinder, the elastic member is arranged along the axial direction of the inner cylinder, and the elastic member pushes the center needle toward the end of the outer cylinder and the inner cylinder; The female end is used to be installed on an external circuit board, and includes a plug-in sleeve, which can be plugged into the outer sleeve. When the female end is installed on the circuit board and the plug-in sleeve is plugged into the outer sleeve, the center pin contacts the feeding point on the circuit board.

2. A radio frequency coaxial connector according to claim 1, characterized in that: The end of the inner cylinder is provided with a blind hole extending from the end surface of the inner cylinder to the center of the inner cylinder, the center needle and the elastic member are arranged in the blind hole, one end of the elastic member abuts against the bottom of the blind hole, and the other end of the elastic member abuts against the center needle; or The inner tube is provided with a through hole penetrating the inner tube, the center needle and the elastic member are arranged in the through hole, the center needle is arranged at both ends of the elastic member, and the two ends of the elastic member are respectively abutted against the center needle located at both ends of the elastic member.

3. The radio frequency coaxial connector according to claim 2, characterized in that: A limiting portion is provided at the end of the inner cylinder, and the limiting portion limits the center needle to be located in the blind hole or the through hole.

4. The radio frequency coaxial connector according to claim 1, characterized in that: The first insulating member is an insulating ring, an outer side wall of the insulating ring abuts against the outer tube, and an inner side wall of the insulating ring abuts against the inner tube.

5. The radio frequency coaxial connector according to claim 4, characterized in that: The insulating ring is provided with a through hole arranged along the axial direction.

6. The radio frequency coaxial connector according to claim 1, characterized in that: The female end also includes a second insulating member, which is arranged in the plug-in tube. The second insulating member is provided with a socket, and the socket is arranged corresponding to the feeding point on the circuit board so that the center needle can pass through the socket and contact the feeding point.

7. The radio frequency coaxial connector according to claim 1, characterized in that: The side wall of the plug-in cylinder is recessed inward to form an elastic clamping portion, and the elastic clamping portion can clamp the outer cylinder.

8. The radio frequency coaxial connector according to claim 1, characterized in that: The plug-in tube is provided with a slit extending axially from the end surface of the plug-in end of the plug-in tube.

9. A radio frequency coaxial connector according to any one of claims 1 to 8, characterized in that: The center needle is disposed at both ends of the inner cylinder so that the male end can cooperate with the two female ends.

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