CN110943328A - Radio frequency connector - Google Patents

Radio frequency connector Download PDF

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Publication number
CN110943328A
CN110943328A CN201811110370.5A CN201811110370A CN110943328A CN 110943328 A CN110943328 A CN 110943328A CN 201811110370 A CN201811110370 A CN 201811110370A CN 110943328 A CN110943328 A CN 110943328A
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CN
China
Prior art keywords
conductor
contact
cavity
radio frequency
frequency connector
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Granted
Application number
CN201811110370.5A
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Chinese (zh)
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CN110943328B (en
Inventor
朱小虎
袁凯阳
秦山
克劳德·博仕东
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SHANGHAI RADIALL ELECTRONICS CO LTD
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SHANGHAI RADIALL ELECTRONICS CO LTD
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Priority to CN201811110370.5A priority Critical patent/CN110943328B/en
Publication of CN110943328A publication Critical patent/CN110943328A/en
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Publication of CN110943328B publication Critical patent/CN110943328B/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R24/00—Two-part coupling devices, or either of their cooperating parts, characterised by their overall structure
    • H01R24/38—Two-part coupling devices, or either of their cooperating parts, characterised by their overall structure having concentrically or coaxially arranged contacts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/40—Securing contact members in or to a base or case; Insulating of contact members
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/46—Bases; Cases
    • H01R13/502—Bases; Cases composed of different pieces
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R24/00—Two-part coupling devices, or either of their cooperating parts, characterised by their overall structure

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  • Coupling Device And Connection With Printed Circuit (AREA)

Abstract

The present invention provides a radio frequency connector, comprising: the cable comprises a sleeve-shaped outer conductor, an insulating medium fixed in the outer conductor and a central conductor arranged in the insulating medium; the central conductor comprises two conductors which are axially connected in series and are in axial sliding fit, namely a first conductor and a second conductor, in the axial sliding process, the mutual contact surfaces of the two conductors generate a butting force, the butting force has an axial component force in the axial direction of the central conductor, and the axial component force is gradually increased until the two conductors move synchronously in the axial direction. The radio frequency connector is high in connection reliability.

Description

Radio frequency connector
Technical Field
The invention relates to the technical field of radio frequency connectors, in particular to a high-reliability radio frequency connector.
Background
Nowadays, with the development of communication technology, the requirements on the installation environment of the radio frequency connector are more and more strict, and the requirements on the installation density, the installation mode and the like of the radio frequency connector are also more and more high.
In the design of circuit board-to-circuit board or circuit board-to-module connections, due to manufacturing and assembly errors, the parts of the circuit board-to-circuit board that require insertion of the rf connector all have certain horizontal and vertical position tolerance, reflecting radial and axial tolerances on the rf connector. Most of the existing radio frequency coaxial connection technology which meets the requirements on radial and axial tolerance is of a three-body structure, so that the radio frequency coaxial connection technology is not convenient to install, the assembly process is complex, and the installation cost is high.
The existing circuit board-to-circuit board or circuit board-to-module connection mainly has the following technologies:
1) a three-piece construction, socket-adapter-socket construction; the use of a three-piece construction can allow for relatively large radial tolerances. However, the three-piece structure requires welding sockets on the plates at the two ends, and additionally installing a coaxial connecting rod in the middle, so that the assembling steps are complicated, and the cost is high. And the radial tolerance of the structure is realized through the deflection angle of the connecting rods, when the distance between the circuit boards is larger, the connecting rods are longer, the deflection of the connecting rods at a small angle can cause a larger radial tolerance, and the radial tolerance is possibly not aligned in blind mating and butting, so that the practical use is influenced. Therefore, the installation adopting the scheme is not convenient enough, the installation efficiency is not high and the installation cost is higher.
2) Chinese patent CN 103392266B discloses a high frequency coaxial rf connector, which has a first and a second rf connector parts, and is a two-body structure, which can achieve larger tolerance, but needs to weld a center pin on the board separately, and the other end needs to be assembled once according to practical application, resulting in higher assembly cost. When the installation density is higher, the condition of blind insertion and misalignment can also occur, damage is caused to the center pin, and the reliability of the product is influenced. And the structural characteristics determine that the use frequency of the product is not very high.
Therefore, a radio frequency connector with high reliability, convenient installation and low installation cost is needed.
Disclosure of Invention
In view of the above-mentioned shortcomings of the prior art, the present invention provides a radio frequency connector, which solves the problems of the prior art that it is difficult to mount efficiently and the reliability is low.
To achieve the above and other related objects, the present invention provides a radio frequency connector, comprising: the cable comprises a sleeve-shaped outer conductor, an insulating medium fixed in the outer conductor and a central conductor arranged in the insulating medium; the central conductor comprises two conductors which are axially connected in series and are in axial sliding fit, namely a first conductor and a second conductor, in the axial sliding process, the mutual contact surfaces of the two conductors generate a butting force, the butting force has an axial component force in the axial direction of the central conductor, and the axial component force is gradually increased until the two conductors move synchronously in the axial direction.
Preferably, the second conductor has elasticity and is provided with a first cavity with a reduced opening, one end of the first conductor is limited in the first cavity and slides axially in the first cavity, the other end of the first conductor is provided with a contact part partially exposed out of the outer conductor, the outer radial end part of the contact part is enlarged, and the outer surface of the contact part is in contact with the cavity wall at the reduced opening.
Preferably, the necking is formed by distributing a plurality of open grooves on the wall of the first cavity along the circumferential direction and performing necking treatment.
Preferably, the outer surface of the contact portion is formed by rotating around an axis through an arc line, and a contact surface of the necking and the contact portion is an arc surface matched with the outer surface of the contact portion.
Preferably, the contact portion is tapered, and a contact surface of the constricted portion, which is in contact with the contact portion, is an inclined surface that forms an angle with an axis of the center conductor.
Preferably, the first conductor located in the first cavity is provided with a drop-proof boss.
Preferably, the first conductor has elasticity and is provided with a cavity with a diameter-reducing part, one end of the second conductor is limited in the cavity and axially slides in the cavity, the outer diameter of the contact section of the second conductor is reduced towards the direction of the first conductor along the axial direction, and the outer surface of the contact section is in sliding contact with the cavity wall of the diameter-reducing part.
Preferably, the cavity is formed by a cavity bottom and a cavity wall formed around the axis of the central conductor, and the cavity bottom is a spherical bulge.
Preferably, the second conductor is formed by axially sliding and matching two conductor segments.
Preferably, one of the two conductor sections has a second cavity, and the other conductor section is a cylindrical pin which extends into the second cavity, is in elastic electrical contact with the second cavity and can axially slide relative to the second cavity.
Preferably, the second cavity is surrounded by a plurality of circumferentially distributed elastic conducting strips.
Preferably, the central conductor further includes a third conductor, the third conductor and the second conductor are axially connected in series and axially slidably fit, in the axial sliding process, a contact force is generated at a mutual contact surface of the third conductor and the second conductor, the contact force has an axial component force in the axial direction of the central conductor, and the axial component force is gradually increased until the third conductor and the second conductor synchronously move in the axial direction.
Preferably, the outer conductor comprises a first outer conductor part and a second outer conductor part which are in axial sliding fit, and a spring sleeved on the first outer conductor part and the second outer conductor part, one end of the spring is connected with the first outer conductor part, and the other end of the spring is connected with the second outer conductor part.
Preferably, the insulating medium includes a first insulating portion and a second insulating portion respectively located at both ends of the outer conductor, the first insulating portion being fixed in the first outer conductor portion, and the second insulating portion being fixed in the second outer conductor portion.
Preferably, a limiting convex shoulder is arranged on the peripheral surface of the first outer conductor part, and the limiting convex shoulder divides the first outer conductor part into a first section and a second section; the inner wall of the second outer conductor part is provided with a clamping table protruding inwards, the limiting convex shoulder is matched with the clamping table to limit the first section in the second outer conductor part, and a gap is formed between the clamping table and the outer surface of the second section.
Preferably, a raised electrical contact is arranged on the peripheral surface of the first section, a conductive cavity is arranged in the second outer conductor, and the electrical contact is always in contact with the cavity wall of the conductive cavity.
Preferably, the outer diameter of the first section at the electrical contact is smaller than the inner diameter at the landing on the second outer conductor.
Preferably, the first section is resilient and the electrical contact is formed by a slotted flare in the circumferential direction of the first section.
Preferably, a guide structure for guiding the electric contact to enter is arranged on the conductive cavity.
Preferably, the outer surface of the outer conductor has a threaded section.
Preferably, the outer conductor has a soldering pin for soldering with a circuit board.
As described above, the radio frequency connector of the present invention has the following advantages: the central conductor adopts two conductors which are axially connected in series and are in axial sliding fit, in the axial sliding process, the mutual contact surfaces of the two conductors can generate a butting force, the butting force has an axial component force in the axial direction of the central conductor, the axial component force is gradually increased until the two conductors move synchronously in the axial direction, and when the radio frequency connector continues to be subjected to an axial compression force, the axial component force is kept unchanged, so that the first conductor is kept in contact with the circuit board, and the reliability is improved.
Drawings
Fig. 1 is a diagram of an embodiment of an rf connector according to the present invention.
Fig. 2 is an enlarged view of a portion of the cavity in fig. 1.
Fig. 3 is a partial enlarged view of fig. 1 at B.
Fig. 4 is a diagram of another embodiment of the rf connector of the present invention.
FIG. 5 is a diagram of a center conductor according to an embodiment of the present invention.
Figure 6 is a diagram showing the change of state of the center conductor during installation of the rf connector.
Fig. 7 is a diagram of another embodiment of the center conductor of the present invention.
Fig. 8 is a diagram of an embodiment of an outer conductor of the present invention.
Fig. 9 is a diagram illustrating an embodiment of the second outer conductor portion.
Figure 10 is a diagram of one embodiment of an rf connector.
Fig. 11 is a view showing another embodiment of the second outer conductor part.
Figure 12 is a view of another mounting embodiment of the rf connector.
Figure 13 is a view of a third mounting embodiment of the rf connector.
Description of the element reference numerals
1 outer conductor
11 first outer conductor part
111 position-limiting shoulder
112 electrical contact
101 conductive cavity
102 axial sliding cavity
12 second outer conductor part
121 card table
122 guide structure
123 threaded segment
124 solder terminal
2 spring
3 second conductor
31 first conductor section
32 second conductor segment
321. 311 convex platform
5a, 5b first conductor
501 anti-drop boss
502 contact part
503 bottom of cavity
504 cavity
301 first chamber
302 second chamber
303 contact segment
41 first insulating part
42 second insulating part
6 third conductor
10 circuit board
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.
Please refer to fig. 1 to 13. It should be understood that the structures, ratios, sizes, and the like shown in the drawings and described in the specification are only used for matching with the disclosure of the specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions under which the present invention can be implemented, so that the present invention has no technical significance, and any structural modification, ratio relationship change, or size adjustment should still fall within the scope of the present invention without affecting the efficacy and the achievable purpose of the present invention. In addition, the terms "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not to be construed as a scope of the present invention.
As shown in fig. 1-12, the present invention provides a radio frequency connector comprising: the cable comprises a sleeve-shaped outer conductor 1, an insulating medium fixed in the outer conductor 1 and a central conductor arranged in the insulating medium; as shown in fig. 1 and 9, the central conductor includes two conductors, namely a first conductor 5a, a second conductor 5b and a second conductor 3, which are axially connected in series and axially slidably engaged, and during the axial sliding process, a contact force is generated at a mutual contact surface of the two conductors, and the contact force has an axial component force in the axial direction of the central conductor, and the axial component force is gradually increased until the two conductors synchronously move in the axial direction.
When the radio frequency connector is installed and used, the two conductors axially slide relatively until the axial component force enables the two conductors to axially move synchronously, namely the two conductors do not axially slide relatively, the two conductors form an integral moving part to move synchronously, and when the radio frequency connector is continuously subjected to axial compression force, the axial component force keeps unchanged, so that the first conductor is kept in contact with a circuit board, and the reliability is improved. The rf connector in this embodiment may be a rf coaxial connector, or may be other rf connectors.
The radio frequency connector is used for transmitting radio frequency signals between two circuit boards, the end part of the radio frequency connector is in contact with or directly connected with the circuit boards, the radio frequency connector is of a structure which is rotationally symmetrical around the self axis, the self axis is a central axis X in a figure, and the definition is as follows: the direction from the second conductor 3 to the first conductors 5a, 5b is the forward direction of the axis X (i.e., the direction indicated by the arrow of the axis X in the figure), and vice versa is the reverse direction of the axis X. The axial component force is divided into two types according to different directions, wherein one type is as follows: the axial component is oriented in the same direction as the positive direction of the axis X, in view of the fact that the second conductor exerts a counteracting force on the first conductor in this embodiment, which is shown in fig. 1-6; the other is as follows: the axial force component is directed in the same direction opposite to the axis X, and in view of the embodiment in which the first conductor applies a counteracting force to the second conductor, this embodiment is shown in fig. 7.
Center conductor embodiment one
As shown in fig. 1 to 6, in the present embodiment, the axial serial connection manner of the first conductor 5a and the second conductor 3 is: the second conductor 3 has elasticity and is provided with a first cavity 301 with a reduced opening, one end of the first conductor 5a is limited in the first cavity 301 and slides axially in the first cavity, the other end of the first conductor 5a is provided with a contact portion 502 partially exposed out of the outer conductor 1, as shown in fig. 5, the outer radial end of the contact portion 502 is enlarged (i.e. enlarged along the axis X in the positive direction), and the outer surface of the contact portion 502 is in sliding contact with the cavity wall at the reduced opening. In this embodiment, the first conductor 5a is slidably inserted into the first cavity 301 of the second conductor 3, and the outer diameter of the contact portion 502 is increased, so that the reduced opening is expanded as the outer diameter of the contact portion 502 is increased in the axial sliding process, and the cavity wall at the reduced opening gives a contact force to the outer surface of the contact portion 502, the contact force generates the axial component force, the axial component force is forward towards the axis X until the reduced opening is expanded to the limit, and the axial component force keeps unchanged, so that the first conductor 5a and the second conductor 3 become an integral piece and move synchronously in the axial direction.
As shown in fig. 6, when the rf connector is used, the circuit board 10 applies a pressure to the first conductor 5a, the first conductor 5a slides axially relative to the second conductor 3 so that the axial length of the central conductor is shortened to the shortest, and the axial component force ensures that the first conductor is always in contact with the circuit board, thereby improving the reliability of the connection between the rf connector and the circuit board. The method specifically comprises the following steps: during the axial sliding process of the first conductor 5a relative to the second conductor 3, the contact part 502 is always kept in contact with the cavity wall with acting force at the notch, i.e. the second conductor 3 applies elastic force F perpendicular to the contact surface to the contact part 502BulletAnd the contact portion 502 is of a structure with the outer radial end portion enlarged, as shown in fig. 5, so that the contact surface forms an included angle α with the axis X, and the second conductor 3 has an axial component force F along the axis to the contact portion 502Shaft(i.e., the axial component), a radial component F in the radial directionDiameter of a pipeAnd the axial component force FShaftThat is, in normal operation, the contact portion is subjected to a positive contact pressure (the friction force is neglected in the description herein), the F-axis is F spring × sina, and when the contact portion has an axial compression after the end face of the contact portion is flush with the outer conductor, the axial component force F isShaftThe contact positive pressure of the first conductor is not affected by the axial compression amount and the reliability is improved.
As shown in fig. 6, the contact portion 502 is designed to be higher than the outer conductor (left side view in fig. 6), when the circuit board 10 is pressed down, firstly the contact portion 502 contacts the circuit board 10 (middle view in fig. 6), when the circuit board 10 is pressed down to a certain distance (the contact portion 502 is higher than the outer conductor), in this process, mainly the contact portion 502 is pressed into the first cavity 301 by the circuit board 10, and the necking of the first cavity 301 is enlarged by the contact portion 502 until the circuit board 10 contacts the outer conductor 1. When the circuit board 10 contacts the outer conductor 1 (right side in fig. 6)Figure) and the circuit board 10 is further pressed down, while the outer conductor 1 and the central conductor are both displaced axially in synchronism, so that a large axial tolerance is achieved, and during this process, the direct contact pressure of the contact portion 502 with the circuit board 10 is always in contact with the axial component force F given by the throat of the first cavity 301ShaftEqually, the force component is constant during the axial displacement (because the size of the throat of the first cavity 301 is constant), thereby ensuring that the positive contact pressure of the center conductor is not affected by the amount of axial compression.
In order to better realize the axial sliding connection between the first conductor 5a and the second conductor 3, as shown in fig. 1 and 5, in this embodiment, the necking is formed by distributing a plurality of open slots along the circumferential direction on the wall of the first cavity 301 and necking the open slots. In this embodiment, the elastic force F is equal to the product of the number of the open grooves and the axial component force F axis.
To better slidingly engage the first conductor 5a with the second conductor 3, the axial force component F is maintainedShaftAs shown in fig. 5, the outer surface of the contact portion 502 in this embodiment is formed by rotating an arc around the axis, i.e. the generatrix of the contact portion is an arc; the contact surface of the reduced opening, which is in contact with the contact portion 502, is an arc surface matched with the outer surface of the contact portion, that is, an axial section line of the cavity wall at the reduced opening (the axial section line is a contour line of the cavity wall at the reduced opening on the axial section) is an arc line, that is, the contact of the contact portion 502 and the second conductor 3 is a contact of the arc surface and the arc surface.
As another embodiment of the contact portion, in the present embodiment, the contact portion 502 is tapered, that is, the generatrix of the contact portion 502 is a straight line; the contact surface of the reduced opening, which is in contact with the contact portion 502, is an inclined surface forming a certain angle with the axis of the central conductor, that is, the axial section line of the cavity wall at the reduced opening (the axial section line is the contour line of the cavity wall at the reduced opening on the axial section) is a straight line, that is, the contact of the contact portion 502 and the second conductor 3 is a line contact.
In order to prevent the first conductor from coming off the second conductor, as shown in fig. 5, in this embodiment, the first conductor 5a located in the first cavity 301 has a circumferentially protruding anti-falling boss 501, and in this embodiment, the outer diameter of the anti-falling boss 501 is only required to be larger than the maximum outer diameter of the first cavity 301 at the reduced position. In use, the first conductor 5a is pressed into the first cavity 301, so that it is certainly not pulled out.
In this embodiment, the second conductor 3 is formed by adopting an elastic member with an axial second cavity and slotting a necking on the cavity wall of the opening end, the diameter of the front section part of the first conductor 5a is smaller, when the second conductor is in a free state, the elastic necking of the second conductor 3 can be clamped at the smaller diameter part of the first conductor 5a, and the second conductor can be separated only when the contact part 502 with the larger outer diameter overcomes the necking force of the first cavity 301. The first conductor does not fall off unless a pulling force is intentionally applied to the contact portion to the left (with respect to fig. 5) or the first cavity 301 is directly opened by the necking. The design ensures that the product does not fall out during storage, transportation, assembly, disassembly, etc.
Second embodiment of the center conductor
As shown in fig. 7, in this embodiment, the first conductor 5b has an elastic cavity 504 with a reduced diameter portion, one end of the second conductor 3 is limited in the cavity 504 and axially slides in the cavity 504, the outer diameter of the contact section 303 of the second conductor 3 is reduced in the direction of the first conductor 5b along the axial direction, and the outer surface of the contact section 303 is in sliding contact with the cavity wall at the reduced diameter portion. In this embodiment, the first conductor 5b has an open cavity, the second conductor 3 is inserted into the cavity, and the outer diameter of the contact section 303 becomes smaller in the axial direction toward the first conductor 5b (i.e., becomes smaller in the positive direction along the axis X), and the outer surface of the contact section 303 and the cavity wall at the position of the notch are in contact with each other. In this embodiment, the second conductor 3 is slidably inserted into the first conductor 5b, the outer diameter of the contact section 303 increases in the opposite direction along the axis X, during the axial sliding process, the reduced diameter portion of the cavity 504 expands outwards as the outer diameter of the contact section 303 increases, and then the cavity wall of the reduced diameter portion provides a contact force to the outer surface of the contact section 303, the contact force generates the axial component force, the axial component force in this embodiment is opposite to the axis X until the reduced diameter portion is expanded to the limit, and the axial component force remains unchanged, so that the first conductor 5b and the second conductor 3 become an integral piece and move synchronously in the axial direction.
For better contact with the circuit board, the cavity 504 of this embodiment is formed by a cavity bottom 503 and a cavity wall formed around the axis of the central conductor, the cavity bottom 503 is a spherical protrusion, that is, the first conductor 5b has a spherical protrusion, which is in point contact with the circuit board, and under the condition that the axial component force is kept unchanged, even if the radio frequency connector has a radial offset, the stability of contact with the circuit board is not affected.
Center conductor embodiment III
As shown in fig. 1 and 4, the first conductor in this embodiment may be any one of the first and second central conductor embodiments, and this embodiment only changes the second conductor, the second conductor 3 is formed by two conductor segments axially sliding-fit, in the first conductor segment 31 and the second conductor segment 32 in the figure, one end of the first conductor segment 31 may be exposed out of the outer conductor 1 to form a conductive end, and the other end of the first conductor segment 31 is axially sliding-fit with one end of the second conductor segment 32. In the embodiment, the second conductor 3 is provided as two sections in sliding fit, when the first conductor and the second conductor move integrally and synchronously, if the first conductor and the second conductor continue to receive axial compression force, the two sections of the second conductor 3 can slide relatively, so that the axial tolerance of the central conductor is increased.
In order to better realize the sliding fit between the first conductor segment 31 and the second conductor segment 32, in this embodiment, one of the first conductor segment 31 and the second conductor segment 32 has a second cavity 302, and the other one is a cylindrical pin, which extends into the second cavity 302 and forms an elastic electrical contact with the second cavity 302, and can axially slide relative to each other. As shown in fig. 1, the second chamber 302 is disposed on the first conductor segment 31, and one end of the second conductor segment 32 is inserted into the first conductor segment 31, so that the two are axially slidable. The sliding fit and elastic electrical contact between the first conductor segment and the second conductor segment are not limited to this, and may be achieved by embedding a crown spring on the second conductor segment 32.
The second cavity 302 is defined by a plurality of circumferentially distributed conductive strips. In this embodiment, the first conductor segment 31 is an elastic member, and the second cavity 302 is formed by slotting and necking in the circumferential direction, so that the first conductor segment 31 and the second conductor segment 32 form a pin and socket fit structure, and enough space is also left in the axial direction, thereby ensuring the reliability of the contact between the first conductor segment 31 and the second conductor segment 32 when the axial tolerance is large.
Example four of the center conductor
As shown in fig. 4, the first conductor and the second conductor in this embodiment may be the structures described in the first embodiment, the second embodiment and the third embodiment of the central conductor, the central conductor in this embodiment further includes a third conductor 6, the third conductor 6 and the second conductor 3 are axially connected in series and axially slidably engaged, during the axial sliding process, a contact force is generated at a mutual contact surface of the third conductor 6 and the second conductor 3, and the contact force has an axial component force in the axial direction of the central conductor, and the axial component force is gradually increased until the third conductor and the second conductor synchronously move in the axial direction. In this embodiment, both ends of the central conductor are compressible structures, and both ends can be in contact connection with the circuit board. In the embodiment, the principle of connection between the third conductor and the second conductor is the same as that of connection between the first conductor and the second conductor, and both adopt that in the axial sliding process, the mutual contact surfaces of the two conductors generate a contact force, the contact force has an axial component force in the axial direction of the central conductor, the axial component force is gradually increased until the two conductors synchronously move in the axial direction, and when the axial compression force is continuously applied, the axial component force is kept unchanged, so that the first conductor is kept in contact with the circuit board, and the reliability is improved. Similarly, the third conductor and the second conductor may be connected in a plurality of ways according to the direction of the axial component, as described above for the first conductor and the second conductor.
The third conductor 6 may be any one of the first and second embodiments of the center conductor, as long as it is connected in series with the second conductor 3 in the axial direction, similarly to the first conductor structure. And will not be described in detail herein.
The both ends of the whole center conductor of this embodiment are the structural style of axial concatenate, and the both ends of second conductor 3 connect above-mentioned third conductor 6 and first conductor in series axially respectively promptly, and the radio frequency connector of this kind can directly lay, can realize both ends press contact. The installation of this mode is nimble efficiency more, directly puts into the cavity in the installation circuit board and can realize connecting.
Outer conductor
To further ensure the axial tolerance of the whole rf connector, as shown in fig. 1-4 and 8, the outer conductor 1 of this embodiment includes a first outer conductor portion 11 and a second outer conductor portion 12 having an axial sliding fit, and a spring 2 sleeved on the first outer conductor portion 11 and the second outer conductor portion 12, wherein one end of the spring 2 is connected to the first outer conductor portion 11, and the other end of the spring 2 is connected to the second outer conductor portion 12. The first outer conductor portion 11 and the second outer conductor portion 12 are each substantially cylindrical, and the first outer conductor portion 11 is inserted into the second outer conductor portion 12 to form a sleeve-shaped outer conductor, both of which are axially slidable. As shown in fig. 6, when the circuit board 10 contacts the outer conductor 1 and then continues to press down the circuit board 10, the spring 2 is compressed, and the center conductor is connected to the outer conductor 1 through the insulating medium, so that the outer conductor 1, the insulating medium, and the center conductor 2 are axially displaced in synchronization, thereby achieving a large axial tolerance.
In order to better fix the central conductor, as shown in fig. 8, the insulating medium in this embodiment includes a first insulating portion 41 and a second insulating portion 42 respectively located at two ends of the outer conductor, the first insulating portion 41 is fixed in the first outer conductor portion 11, and the second insulating portion 42 is fixed in the second outer conductor portion 12. In the embodiment, the insulating medium is matched with the outer conductors, and an insulating part is fixedly arranged in each outer conductor part, so that the whole radio frequency connector is convenient to assemble; in addition, if the center conductor includes only the first conductor 5 and the second conductor 3, the second conductor 3 is inserted into the first insulating portion 41 and the second insulating portion 42; if the second conductor 3 is divided into two sections, the two conductor sections can be connected to the first insulating portion 41 and the second insulating portion 42, respectively.
The second conductor 3 in this embodiment may include the above-mentioned first conductor segment 31 and second conductor segment 32, the second conductor segment 32 is connected to the first insulating portion in a positioning manner, the outer peripheral surface of the second conductor segment 32 is provided with a boss 321 engaged with the first insulating portion 42, the first conductor segment 31 is connected to the second insulating portion 42 in a positioning manner, and the outer peripheral surface of the first conductor segment 31 is provided with a boss 311 engaged with the second insulating portion 42.
In order to better enable the first outer conductor part 11 and the second outer conductor part 12 to axially slide, as shown in fig. 1-3, a limiting shoulder 111 is arranged on the outer circumferential surface of the first outer conductor part 11, and the limiting shoulder 111 divides the first outer conductor part 11 into two sections, namely a first section and a second section; the inner wall of the second outer conductor part 12 is provided with a clamping table 121 protruding inwards, and the limiting shoulder 111 is matched with the clamping table 121 to limit the first section in the second outer conductor 12, so that the first outer conductor part 11 is prevented from being separated from the second outer conductor part 12. As shown in fig. 8, in the present embodiment, a gap d1 is formed between the clamping platform 121 and the outer surface of the second section, so that the entire rf connector can be skewed at a certain angle to satisfy a certain radial tolerance, and at the same time, a certain radial tolerance is further allowed by the design of the cavity YOUT of the circuit board L.
As shown in fig. 1, fig. 3 and fig. 8, in this embodiment, a raised electrical contact 112 is disposed on the outer peripheral surface of the first section, a conductive cavity 101 is disposed in the second outer conductor portion 12, and the electrical contact 112 is always in contact with the cavity wall of the conductive cavity 101, as shown in fig. 3, in order to facilitate the entry of the electrical contact into the conductive cavity 101, a guide structure 122 for guiding the entry of the electrical contact is disposed at a port of the conductive cavity.
In the present embodiment, the outer diameter of the first outer conductor portion electrical contact 112 is smaller than the inner diameter of the second outer conductor portion clamping base 121, and as shown in fig. 8, even if the outer diameter of the electrical contact and the inner diameter of the clamping base have a gap d2, the position where the first outer conductor portion 11 and the second outer conductor portion 12 are engaged with each other is radially displaced from the electrical contact position by a certain distance, and this design is designed to prevent the clamping base 121 and the electrical contact 112 from interfering during assembly, so that the electrical contact 112 is deformed, the contact reliability is affected, and the electrical contact 112 of the outer conductor is protected. By adopting the design, the requirement on the material of the elastic piece for forming the outer conductor can be properly reduced, and the cost is reduced.
The first outer conductor portion 11 in this embodiment is an elastic member, and the electrical contact 112 is formed by notching and flaring the elastic first section in the circumferential direction.
Referring to fig. 1, in the present embodiment, the inner cavity of the second outer conductor portion 12 is a multi-step hole, wherein the cavity at one end is an axial sliding cavity 102, the middle cavity has a smaller aperture as the conductive cavity 101, and the cavity at the other end is mounted with the second insulating portion 42. The axial sliding cavity 102 ensures the axial sliding travel of the first outer conductor part 11 relative to the second outer conductor part 12, and its inner diameter is larger than the conducting cavity 101, which facilitates the above-mentioned electrical contacts on the first outer conductor part 11 to extend into the conducting cavity and form a certain radial tolerance.
Mounting embodiment of radio frequency connector
For the convenience of installation, as shown in fig. 9, the outer surface of the outer conductor 1 of this embodiment has a threaded section 123, and specifically, the threaded section 123 may be provided on the second outer conductor portion. The rf connector of the present embodiment can be installed by a screw, as shown in fig. 10, a circuit board 10 is provided with a threaded hole, the threaded section 123 is screwed into the threaded hole, and the conductive terminal extending from the central conductor can be soldered to a corresponding device according to the requirement of a customer. The other end of the rf connector (i.e. the first conductor 5a \5b) is in direct planar pressure contact with the circuit board 10.
Furthermore, if the thread position is changed into a direct excircle, the threaded hole of the mounting cavity is changed into a unthreaded hole, and the mounting mode can be changed into a crimping mode.
Mounting embodiment of RF connector
As shown in fig. 11 and 12, the outer conductor 1 has axially outwardly extending solder pins 124. The radio frequency connector of the present embodiment can be installed by welding; the soldering pins 124 can be directly through-hole soldered to the circuit board 10 according to the customer's requirement, and the other end (i.e. the first conductor 5a \5b) is in direct planar pressure contact with the circuit board. By adopting the mounting mode, the radio frequency connector and the circuit board 10 can be directly integrated, and higher mounting density and assembly efficiency can be realized.
Mounting embodiment of radio frequency connector
As another embodiment of the radio frequency connector, the radio frequency connector is a straight type, that is, the center conductor is the structure described in the fourth embodiment of the center conductor, and has the first conductor, the second conductor and the third conductor, which may be the structure shown in fig. 4, and the two ends of the radio frequency connector can be pressed and contacted by axially connecting the first conductor and the second conductor in series and sliding, and axially connecting the third conductor and the second conductor in series and sliding, as shown in fig. 13. The installation of this mode is nimble efficiency more, can realize connecting in directly putting into the cavity in the mounting panel.
In summary, in the radio frequency connector of the present invention, the central conductor is two conductors axially connected in series and axially slidably engaged, in the axial sliding process, a contact force is generated at a mutual contact surface of the two conductors, and the contact force has an axial component force in the axial direction of the central conductor, the axial component force is gradually increased until the two conductors synchronously move in the axial direction, and when an axial compression force is continuously applied, the axial component force remains unchanged, so that the first conductor is kept in contact with the circuit board, and the reliability is increased. Therefore, the invention effectively overcomes various defects in the prior art and has high industrial utilization value.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.

Claims (21)

1. A radio frequency connector, comprising: the cable comprises a sleeve-shaped outer conductor, an insulating medium fixed in the outer conductor and a central conductor arranged in the insulating medium; the central conductor comprises two conductors which are axially connected in series and are in axial sliding fit, namely a first conductor and a second conductor, in the axial sliding process, the mutual contact surfaces of the two conductors generate a butting force, the butting force has an axial component force in the axial direction of the central conductor, and the axial component force is gradually increased until the two conductors move synchronously in the axial direction.
2. The rf connector of claim 1, wherein the second conductor has an elastic and first cavity with a reduced opening, one end of the first conductor is retained in the first cavity and slides axially in the first cavity, the other end of the first conductor has a contact portion partially exposed outside the outer conductor, an outer radial end of the contact portion is enlarged, and an outer surface of the contact portion contacts with a cavity wall of the reduced opening.
3. The radio frequency connector according to claim 2, wherein the necking is formed by distributing a plurality of open grooves on the wall of the first cavity along the circumferential direction and necking the open grooves.
4. The radio frequency connector according to claim 2, wherein the outer surface of the contact portion is formed by rotating an arc about an axis, and a contact surface of the tapered portion contacting the contact portion is an arc surface matching the outer surface of the contact portion.
5. The radio frequency connector of claim 2, wherein the contact portion is tapered, and the contact surface of the throat in contact with the contact portion is a bevel angled with respect to the axis of the center conductor.
6. The radio frequency connector of claim 2, wherein the first conductor within the first cavity has a snap-off prevention boss thereon.
7. The radio frequency connector of claim 1, wherein the first conductor has an elastic cavity with a reduced diameter portion, one end of the second conductor is retained in the cavity and axially slides in the cavity, the contact section of the second conductor has an outer diameter that decreases in a direction axially toward the first conductor, and the outer surface of the contact section is in sliding contact with a wall of the reduced diameter portion.
8. The radio frequency connector of claim 7, wherein the cavity is formed by a cavity bottom and a cavity wall formed around the central conductor axis, the cavity bottom being a spherical protrusion.
9. The radio frequency connector of claim 1, wherein the second conductor is formed by axially sliding fitting two conductor segments.
10. The rf connector of claim 9, wherein one of the two conductor segments has a second cavity and the other segment is a cylindrical pin, the cylindrical pin extending into the second cavity and making resilient electrical contact with the second cavity and being axially slidable relative thereto.
11. The radio frequency connector of claim 10, wherein: the second cavity is surrounded by a plurality of elastic conducting strips distributed circumferentially.
12. The radio frequency connector according to claim 1, wherein the central conductor further includes a third conductor, the third conductor is axially connected in series with the second conductor and axially slidably engaged with the second conductor, during the axial sliding process, a contact force is generated at a mutual contact surface of the third conductor and the second conductor, and the contact force has an axial component in an axial direction of the central conductor, and the axial component gradually increases until the third conductor and the second conductor synchronously move in the axial direction.
13. A radio frequency connector according to any one of claims 1 to 12, wherein: the outer conductor comprises a first outer conductor part and a second outer conductor part which are in axial sliding fit, and a spring sleeved on the first outer conductor part and the second outer conductor part, one end of the spring is connected with the first outer conductor part, and the other end of the spring is connected with the second outer conductor part.
14. The radio frequency connector of claim 13, wherein: the insulating medium includes a first insulating portion fixed in the first outer conductor portion and a second insulating portion fixed in the second outer conductor portion.
15. The radio frequency connector of claim 13, wherein: the outer peripheral surface of the first outer conductor part is provided with a limiting convex shoulder which divides the first outer conductor part into a first section and a second section; the inner wall of the second outer conductor part is provided with a clamping table protruding inwards, the limiting convex shoulder is matched with the clamping table to limit the first section in the second outer conductor part, and a gap is formed between the clamping table and the outer surface of the second section.
16. The radio frequency connector of claim 15, wherein: the outer peripheral surface of the first section is provided with a raised electric contact, a conductive cavity is arranged in the second outer conductor, and the electric contact is always in contact with the cavity wall of the conductive cavity.
17. The radio frequency connector of claim 16, wherein: the outer diameter of the first section at the electrical contact is less than the inner diameter of the second outer conductor at the landing.
18. The radio frequency connector of claim 16, wherein: the first section is resilient and the electrical contact is formed by a slotted flare in the circumferential direction of the first section.
19. The radio frequency connector of claim 16, wherein: and a guide structure for guiding the electric contact to enter is arranged on the conductive cavity.
20. The radio frequency connector of claim 15, wherein an outer surface of the outer conductor has a threaded section.
21. The radio frequency connector of claim 15, wherein the outer conductor has a solder pin for soldering to a circuit board.
CN201811110370.5A 2018-09-21 2018-09-21 Radio frequency connector Active CN110943328B (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101656383A (en) * 2009-08-03 2010-02-24 上海雷迪埃电子有限公司 Spring loading connector
CN201518375U (en) * 2008-11-25 2010-06-30 上海雷迪埃电子有限公司 High-frequency coaxial connector
CN102394458A (en) * 2011-07-03 2012-03-28 杭州全盛机电科技有限公司 Digital high definition slip ring capable of realizing definition of 1080P (Progressive Scan)
EP3319183A2 (en) * 2016-11-03 2018-05-09 Tyco Electronics (Shanghai) Co. Ltd. Adapter, receptacle and connector assembly

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201518375U (en) * 2008-11-25 2010-06-30 上海雷迪埃电子有限公司 High-frequency coaxial connector
CN101656383A (en) * 2009-08-03 2010-02-24 上海雷迪埃电子有限公司 Spring loading connector
CN102394458A (en) * 2011-07-03 2012-03-28 杭州全盛机电科技有限公司 Digital high definition slip ring capable of realizing definition of 1080P (Progressive Scan)
EP3319183A2 (en) * 2016-11-03 2018-05-09 Tyco Electronics (Shanghai) Co. Ltd. Adapter, receptacle and connector assembly

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