CN108682991B

CN108682991B - Board-to-board radio frequency head

Info

Publication number: CN108682991B
Application number: CN201810369570.6A
Authority: CN
Inventors: 杨伟; 计亚斌; 邓红波
Original assignee: JUST CONNECTOR KUNSHAN CO Ltd
Current assignee: JUST CONNECTOR KUNSHAN CO Ltd
Priority date: 2018-04-23
Filing date: 2018-04-23
Publication date: 2020-10-27
Anticipated expiration: 2038-04-23
Also published as: CN108682991A

Abstract

A plate-to-plate radio frequency plug comprises a plug body, a plurality of plug terminals, a shielding shell and a coaxial line, wherein the plug terminals, the shielding shell and the coaxial line are integrally formed in the plug body, the plug body comprises a base, a body outer wall integrally extending upwards from the periphery of the base, an island part integrally extending upwards from the middle of the base, an inserting space formed between the body outer wall and the island part, a platform part outwardly extending from the periphery of the base and a covering part extending from one side of the platform part, from which the plug terminal extends, the plug terminal comprises a fixing part formed in the base and a first welding leg extending from one end of the fixing part to the lower part of the covering part, a bending part is formed between the fixing part and the first welding leg, and the central conductor of the coaxial line is welded above the first welding leg. The plate of this application is thinner to plate type plug thickness.

Description

Board-to-board radio frequency head

Technical Field

The present application relates to the field of rf connectors, and more particularly, to a board-to-board rf plug.

Background

A PCB of an existing mobile phone generally has a radio frequency connector connected to a coaxial cable to transmit radio frequency signals, such as antenna signals and high frequency signals between different boards;

the 5G communication technology is coming, the frequency is further improved, the existing technical scheme of adopting a coaxial line to transmit radio frequency signals cannot meet the capacity requirement, the requirement of the frequency improvement on high-frequency interference is stricter, and meanwhile, the crosstalk among a plurality of radio frequency signals also needs a solution.

Disclosure of Invention

In view of the above, it is desirable to provide a board-to-board rf plug with a thinner product thickness.

In order to solve the above technical problems, the present application provides a plate-to-plate type radio frequency plug, which comprises a plug body, a plurality of plug terminals integrally formed in the plug body, a shielding shell and a coaxial line, the plug body comprises a base, a body outer wall integrally extending upwards from the periphery of the base, an island part integrally extending upwards from the middle of the base, an inserting space formed between the body outer wall and the island part, a platform part outwardly extending from the periphery of the base and a covering part extending from one side of the platform part, from which the plug terminal extends, the plug terminal comprises a fixing part formed in the base and a first welding leg extending from one end of the fixing part to the lower part of the covering part, a bending part is formed between the fixing part and the first welding leg, and the central conductor of the coaxial line is welded above the first welding leg.

According to the coaxial cable, the bending part is designed at the first welding leg, so that the distance between the first welding leg and the surface of the base can be increased, and the space for accommodating the central conductor and the insulating strip of the coaxial cable is increased; therefore, the base can be designed to be thinner, the overall thickness of the radio frequency plug A is further thinner, and the thinning trend of the mobile phone market is met.

Preferably, the surface of one side of the first solder tail, which is far away from the covering part, is lower than the surface of the fixing part by the bending part.

Preferably, the upper surface of the covering part is not higher than the lower surface of the base.

Preferably, after the central conductor of the coaxial cable is welded above the first welding foot, an insulating strip is crimped above the central conductor.

Preferably, the insulating strip is used for isolating a possible short-circuit problem between the first solder tail or the central conductor and the shielding shell.

Preferably, the shielding case includes a substrate, a first covering portion formed by bending and extending from one side of the substrate in a reverse direction, a cover plate formed by bending and extending from the first covering portion in a vertical direction, a second covering portion formed by bending and extending from two sides of the substrate adjacent to the first covering portion in a vertical direction, a third covering portion formed by bending from one side of the substrate and the cover plate opposite to the first covering portion, and an opening provided in the cover plate for exposing the plug body and the plug terminal to the outside, and the insulating strip is clamped between the central conductor and the substrate and between the first solder leg and the substrate.

Preferably, the plug terminal further includes a first contact portion bent from the other end of the holding portion and extending along one side surface of the island portion, a first connection portion bent from the end of the first contact portion and extending along the top surface of the island portion, a second contact portion bent from the end of the first connection portion and extending along the other side surface of the island portion, and a barb portion bent from the end of the second contact portion toward one side of the first contact portion and embedded into the island portion or the base

Preferably, the shielding case includes a base plate, a first covering portion formed by bending and extending from one side of the base plate in a reverse direction, a cover plate formed by bending and extending from the first covering portion in a vertical direction, a second covering portion formed by bending and extending from two sides of the base plate adjacent to the first covering portion in a vertical direction, a third covering portion formed by bending from one side of the base plate and the cover plate opposite to the first covering portion, an opening provided in the cover plate for exposing the plug body and the plug terminal to the outside, and a wire clamp provided on one side of the third covering portion of the base plate or the cover plate.

Preferably, the periphery of the opening of the cover plate is further stamped and drawn to form a plug wrapping part surrounding the outer wall of the body.

Preferably, a platform part outside the base of the plug body is clamped between the substrate and the cover plate, and the outer wall of the body is covered by the plug covering part.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:

FIG. 1 is a perspective view of a radio frequency plug of the present application;

FIG. 2 is a perspective view of the radio frequency plug of the present application with the shield shell removed;

FIG. 3 is a cross-sectional view taken along the line B-B in FIG. 2;

figure 4 is a perspective view of the shield housing of the radio frequency plug of the present application;

FIG. 5 is a cross-sectional view taken along the line C-C shown in FIG. 4;

FIG. 6 is an exploded perspective view of the RF plug of the present application connected to a coaxial cable;

FIG. 7 is a sectional view taken along the line A-A in FIG. 1 and a partial enlarged view thereof;

FIG. 8 is a perspective view of a radio frequency receptacle of the present application;

fig. 9 is an exploded perspective view of the rf jack of the present application;

FIG. 10 is a cross-sectional view taken along the line D-D of FIG. 8;

fig. 11 is a combination diagram of the rf plug and rf socket of the present application.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be described in detail and completely with reference to the following specific embodiments of the present application and the accompanying drawings. It should be apparent that the described embodiments are only some of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

Referring to fig. 11, the rf connector assembly of the present application includes a socket B, a plug a mated with the socket B, and a coaxial cable C connected to the plug a.

Referring to fig. 1 to 7, the plug a includes a plug body 20, a plurality of plug terminals 40 inserted or molded in the plug body 20, and a shielding shell 10.

As shown in fig. 2 and 3, the plug body 20 includes a base 21, a body outer wall 22 integrally extending upward from the periphery of the base 21, an island 23 integrally extending upward from the middle of the base 21, and an insertion space 25 formed between the body outer wall 22 and the island 23. The outer periphery of the base 21 extends outward to form a platform portion 211, and a covering portion 24 extends from one side of the base 21 where the plug terminal 40 extends out.

The plug terminal 40 includes a holding portion 41 formed in the base 21, a first leg 42 extending from one end of the holding portion 41 to the lower side of the covering portion 24, a first contact portion 43 bent from the other end of the holding portion 41 and extending along one side of the island portion 23, a first connection portion 44 extending from the end of the first contact portion 43 and extending along the top of the island portion 23, a second contact portion 45 bent from the end of the first connection portion 44 and extending along the other side of the island portion 23, and a barb portion 46 bent from the end of the second contact portion 45 toward the first contact portion 43 and embedded into the island portion 23 or the base 21.

A bent part 47 is formed between the holding part 41 and the first solder tail 42, and the bent part 47 makes the surface of the first solder tail 42 on the side away from the covering part 24 lower than the surface of the holding part 41, so that the distance between the first solder tail 42 and the surface of the base 21 can be increased to increase the space; meanwhile, the upper surface of the covering portion 24 is not higher than the lower surface of the base 21, that is, the covering portion 24 is formed by extending outward from the outer wall 22 of the body. Therefore, please refer to fig. 6 and 7, when the central conductor C1 of the coaxial cable C is fixed to the first solder tail 42, an insulating strip 50 needs to be pressed above the central conductor C1, and the design of the bent portion 47 increases the space above the central conductor C1, so that the base 21 can be designed to be thinner, the overall thickness of the rf plug a is thinner, and the trend of thinning in the mobile phone market is met.

The barb portion 46 of the plug terminal 40 is embedded into the island portion 23 or the base 21, so as to enhance the holding force between the end of the second contact portion 45 of the plug terminal 40 and the socket body 20, so that the plug terminal 40 is not easily loosened from the plug body 20 due to stress when the radio frequency plug a is plugged or unplugged.

As shown in fig. 6 and 9, the coaxial cable C includes a central conductor C1, a first insulating layer C2 covering the central conductor C1, a shielding braid C3 covering the first insulating layer C2, and a second insulating layer C4 covering the shielding braid C3.

The number of the coaxial lines C is half of that of the plug terminal 40, and the coaxial lines are welded to the first welding portion 42 of the plug terminal 40 at intervals. With this arrangement, signal crosstalk between the plug terminals 40 can be reduced, and isolation can be increased.

Referring to fig. 4 and 5, the shielding shell 10 is used for shielding the high-frequency signal on the plug terminal 40 of the radio frequency plug a. The shield case 10 includes a base plate 11, a first covering portion 12 formed by bending and extending from one side of the base plate 11 in the reverse direction, a cover plate 13 formed by bending and extending from the first covering portion 12 in the vertical direction, a second covering portion 14 formed by bending and extending from two sides of the base plate 11 adjacent to the first covering portion 12 in the vertical direction, a third covering portion 111,135 formed by bending from one side of the base plate 11 and the cover plate 13 opposite to the first covering portion 12, an opening 131 formed in the cover plate 13 for exposing the plug body 20 and the plug terminal 40 of the plug a to the outside, and a clip 16 formed by pressing on the base plate 11 and the cover plate 13.

Each clip 16 includes a first clip portion 161 extending from the base plate 11 or the cover plate 13, and a second clip portion 162 opening on the cover plate 13 or the base plate 11. The first clamping portion 161 extends outwards to form a holding portion 163, and the holding portion 163 clamps and conducts the shielding braid C3 of the coaxial cable C; the second clamping portion 162 has an arc-shaped opening structure to clamp the first insulating layer C2 of the coaxial cable C. The first clamping portion 161 and the second clamping portion 162 are respectively formed on the substrate 11 and the cover plate 13 in a staggered manner, which is beneficial to saving space and facilitating arrangement of the coaxial cables C.

The periphery of the opening of the cover plate 13 is further formed with a plug wrapping portion 132 surrounding the outer wall 22 of the body by stamping and stretching, and the outer sides of the four corners of the plug wrapping portion 132 are provided with buckling concave portions 133. When the plug body 20 is placed in the shielding shell 10, the base 21 is pressed between the cover plate 13 and the substrate 11, and the body outer wall 22 is covered in the plug covering portion 132.

The second covering portion 14 includes a covering wall 141 and a press-connecting portion 142 formed by bending and extending inward from the covering wall 141, and an edge of the cover plate 13 is pressed under the press-connecting portion 142. The two ends of the crimping portion 142 continue to extend relatively to form a reinforcing portion 143 outside the plug cladding 132. The end of the reinforcing part 143 is located outside the plug cover 132 in the longitudinal direction of the second cover 14 so that the reinforcing part 143 is pressed against the cover 13 over a larger area. Thereby, the lateral width of the rf plug a can be made smaller without losing the bonding force between the substrate 11 and the cover plate 13. The base plate 11, the cover plate 13 and the first, second and third covering parts 12,14,111,135 enclose a receiving space for receiving the plug body 20.

Firstly, welding the central conductor C1 of the coaxial cable C to the first welding part 42; then, the plug body 20 and the plug terminal 40 thereon are placed between the substrate 11 and the cover plate 13, the cover plate 13 is pressed, and finally, the top end of the second covering part 14 is bent towards the edge part 132 to buckle and clamp the cover plate 13; subsequently, the shielding braid C3 of the coaxial cable C is soldered to the first clamping portion 161.

Except the interface of the plug A and the socket B, the plug A is completely covered in the shielding shell 10, so that high-frequency signals are completely shielded in the shielding shell 10, and electronic devices in the intelligent mobile phone cannot be influenced.

Referring to fig. 8 to 10, the socket B includes a socket body 60, a socket fixing member 80 integrally formed on the socket body 60, and a socket terminal 70 installed in the socket body 60.

The socket body 60 includes a bottom wall 61, a rail 62 integrally extending upward from the bottom wall 61, a mating cavity 64 opened in the rail 62, a terminal slot 63 penetrating through the bottom wall 61 and communicating with the mating cavity 64, and an extending portion 65 extending outward from the bottom wall 61.

The socket terminal 70 is inserted into the terminal groove 63 from below the socket base 61, the socket terminal 70 includes a second solder leg 71, a U-shaped contact portion 73 formed by bending one end of the second solder leg 71 multiple times, and an end portion 74 formed by reversely bending the tail end of the U-shaped contact portion 73, the U-shaped contact portion 73 is in buckling contact with the first and

second contact portions

43,45 of the plug terminal 40, and the U-shaped contact portion 73 includes two

other contact portions

75,76 electrically contacting with the first and

second contact portions

43, 45. The U-shaped contact portion 73 has a gap from the socket body 60 to make the U-shaped contact portion 73 elastic. The two

contact portions

75,76 of the U-shaped contact portion 73 are located on the opposite wall surfaces of the mating cavity 64, and the island portion 23 of the plug body 20 is inserted into the mating cavity 64, so that the first and

second contact portions

43,45 located on the outer surface of the island portion 64 are electrically contacted with the

contact portions

75,76 of the U-shaped contact portion 73 located on the inner surface of the mating cavity 64.

The socket holder 80 is integrally formed on the extension 65. The socket fixing member 80 includes a frame structure 81, a welding portion 83 formed by extending from the bottom of the frame structure 81, and snap protrusions 84 provided at four corners of the frame structure 81. The snap projection 84 is snapped into the snap recess 133 of the shielding shell 10 of the rf plug a. The frame structure 81 is cut to form a notch 82 corresponding to the second solder tail 71, so that the second solder tail 71 can extend out of the socket body 60. An accommodating gap 66 is formed between the rail 62 of the socket body 60 and the frame structure 81, the outer body wall 22 of the plug body 20 and the plug coating portion 132 are inserted into the accommodating gap 66, and the plug coating portion 132 is electrically contacted with the frame structure 81 to be grounded, so as to form a closed shielding space.

The top of the frame structure 81 is provided with at least one groove structure 85 at the top of the longitudinal portion, the top of the frame structure 81 is provided with at least two groove structures 86 at the top of the transverse portion, the provision of the

groove structures

85,86 can improve the elastic force of the frame structure 81, reduce the rigidity, and when the plug cladding 132 is buckled, the buckling protrusion 84 of the socket fixing member 80 is easier to buckle into the buckling recess 133 of the plug cladding 132.

The snap protrusions 84 and the snap recesses 133 are interchangeable, that is, the snap protrusions 84 are disposed at four corners of the plug wrap 132 of the shielding shell 10, and the snap recesses 133 are disposed at four corners of the frame structure 81.

It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

The above description is only an example of the present application and is not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims

1. A plate-to-plate radio frequency plug is characterized by comprising a plug body, a plurality of plug terminals, a shielding shell and a coaxial line, wherein the plug terminals, the shielding shell and the coaxial line are integrally formed in the plug body, the plug body comprises a base, a body outer wall integrally extending upwards from the periphery of the base, an island part integrally extending upwards from the middle of the base, an inserting space formed between the body outer wall and the island part, a platform part extending outwards from each side edge of the periphery of the base and a covering part extending from one side of the platform part, from which the plug terminal extends, the plug terminal comprises a fixing part formed in the base and a first welding leg extending from one end of the fixing part to the lower part of the covering part, a bending part is formed between the fixing part and the first welding leg, and the central conductor of the coaxial line is welded above the first welding leg; the shielding shell comprises a substrate, a first covering part formed by reversely bending and extending from one side of the substrate, a cover plate formed by vertically bending and extending from the first covering part, a second covering part formed by vertically bending two sides of the substrate adjacent to the first covering part, a third covering part formed by bending the substrate and the cover plate from one side of the first covering part, and an opening formed in the cover plate and used for exposing the plug body and the plug terminal to the outside.

2. The board-to-board radio frequency plug of claim 1, wherein the bent portion has a surface of a side of the first solder tail away from the covering portion lower than a surface of the holding portion.

3. The board-to-board radio frequency plug of claim 2, wherein an upper surface of the cover portion is no higher than a lower surface of the base.

4. The board-to-board radio frequency plug of claim 3, wherein after the coaxial line center conductor is soldered above the first solder tail, an insulating strip is crimped above the center conductor.

5. The board-to-board radio frequency plug of claim 4, wherein the insulating strip is used to isolate the first solder tail or possible short circuit between the center conductor and the shield shell, and is sandwiched between the center conductor and the first solder tail and the substrate.

6. The board-to-board rf plug according to claim 1, wherein the plug terminal further includes a first contact portion bent from the other end of the holding portion and extending along one side surface of the island portion, a first connecting portion bent from the end of the first contact portion and extending along the top surface of the island portion, a second contact portion bent from the end of the first connecting portion and extending along the other side surface of the island portion, and a barb portion bent from the end of the second contact portion toward the one side surface of the first contact portion and embedded in the island portion or the base.

7. The board-to-board radio frequency plug of claim 1, wherein the shield case further comprises a clip provided on a side of the base or cover plate on the third cover portion.

8. The board-to-board radio frequency plug of claim 7, wherein the open periphery of the cover plate is further stamped and drawn to form a plug wrap around the outer wall of the body.

9. The board-to-board radio frequency plug of claim 8, wherein a platform portion outside the base of the plug body is sandwiched between the base board and the cover board, and the body outer wall is covered by the plug covering portion.