CROSS-REFERENCE TO RELATED APPLICATION
This application claims the benefit of the filing date under 35 U.S.C. ยง 119(a)-(d) of Chinese Patent Application No. 201810291330.9, filed on Mar. 30, 2018.
FIELD OF THE INVENTION
The present invention relates to a connector and, more particularly, to a radio frequency (RF) coaxial connector.
BACKGROUND
A radio frequency (RF) coaxial connector of a printed circuit board to printed circuit board (BTB) type has a lower end soldered to a lower printed circuit board (PCB) and an upper end in electrical contact with an upper PCB. An upper outer contact of the RF coaxial connector is a contact ring which is pressed by an external spring to ensure an electrical contact with the upper PCB. A lower outer contact of the RF coaxial connector is a housing which is soldered to the lower PCB so as to ensure an electrical connection with the lower PCB. The contact ring is latched onto the housing by an elastic latch. A lower half of an inner contact of the RF coaxial connector is soldered to the lower PCB to ensure an electrical connection with the lower PCB. An upper half of the inner contact is pressed by an internal spring to ensure an electrical contact with the upper PCB. The relative position between the inner contact and the housing is ensured by an insulator.
Because the contact ring is latched onto an outer wall of the housing by the elastic latch, the elastic latch will expand outward when a large axial pushing force is applied to the contact ring. The elastic latch may be easily disengaged from the housing, causing a disengagement of the contact ring from the housing. Further, the external spring pressing the contact ring is usually exposed outside the connector and lacks suitable protection.
SUMMARY
A connector comprises a plurality of outer contacts including a first outer contact and a second outer contact that are slidably assembled together, a plurality of inner contacts disposed within the outer contacts, and a first elastic element disposed between the first outer contact and the second outer contact and adapted to exert a first axial pushing force onto the first outer contact. The second outer contact has an outer cylinder and an inner cylinder connected to the outer cylinder. A receiving groove having an annular cross section is defined between the outer cylinder and the inner cylinder. The first outer contact has an elastic latch adapted to be inserted into the receiving groove and adapted to be latched onto an inner wall of the outer cylinder.
BRIEF DESCRIPTION OF THE DRAWINGS
The invention will now be described by way of example with reference to the accompanying Figures, of which:
FIG. 1 is a perspective view of a connector according to an embodiment;
FIG. 2 is a sectional side view of the connector of FIG. 1;
FIG. 3 is a perspective view of a second outer contact of the connector of FIG. 1;
FIG. 4 is a perspective view of a first outer contact of the connector of FIG. 1;
FIG. 5 is a perspective view of a connector according to another embodiment; and
FIG. 6 is a sectional side view of the connector of FIG. 5.
DETAILED DESCRIPTION OF THE EMBODIMENT(S)
Technical solutions will be further specifically described below with reference to the embodiments of the present disclosure, taken in conjunction with the accompanying drawings. In the specification, the same or similar reference numerals indicate the same or similar elements. The description of the embodiments of the present disclosure with reference to the accompanying drawings is intended to illustrate the general inventive concept of the present disclosure, and should not be construed as limiting the invention.
Moreover, in the following detailed description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the disclosed embodiments. It will be apparent, however, that one or more embodiments may be practiced without these specific details. In other instances, well-known structures and devices are schematically shown in order to simplify the drawing.
A connector according to an embodiment, as shown in FIGS. 1-4, is used to electrically connect a first electronic component 1 with a second electronic component 2. The connector comprises a plurality of outer contacts 110, 120, a plurality of inner contacts 210, 220, and a first elastic element 130. In an embodiment, the connector is a radio frequency (RF) coaxial connector. In the embodiment shown in FIG. 2, the first electronic component 1 and the second electronic component 2 are both circuit boards, however, in another embodiment, the second electronic component 2 may be a filter.
The outer contacts 110, 120, as shown in FIGS. 1-4, include a first outer contact 110 and a second outer contact 120 which are slidably assembled together. The inner contacts 210, 220 are disposed within the outer contacts 110, 120; the inner contacts 210, 220 are provided in a longitudinal passageway extending through the outer contacts 110, 120. The inner contacts 210, 220 include a first inner contact 210 and a second inner contact 220 which are slidably assembled together.
The first elastic element 130, as shown in FIGS. 1 and 2, is disposed between the first outer contact 110 and the second outer contact 120 and is adapted to exert a first axial pushing force onto the first outer contact 110. The first outer contact 110 is in a reliable electrical contact with the first electronic component 1 under the axial pushing force exerted by the first elastic element 130.
The second outer contact 120, shown in FIGS. 1-3, includes an outer cylinder 121 and an inner cylinder 122 connected to the outer cylinder 121. A receiving groove 123 having an annular cross section is defined between the outer cylinder 121 and the inner cylinder 122. In an embodiment, the second outer contact 120 is integrally formed of metal by a casting process.
The first outer contact 110, as shown in FIGS. 1, 2, and 4, includes an elastic latch 111a and an elastic arm 112a. The elastic latch 111a is inserted into the receiving groove 123 and is adapted to be latched onto an inner wall of the outer cylinder 121. The elastic arm 112a is inserted into the inner cylinder 122 and is adapted to be in an elastically electrical contact with an inner wall of the inner cylinder 122. In an embodiment, the first outer contact 110 is a single conductive element formed by stamping a single metal sheet.
As shown in FIGS. 2 and 3, a blocking protrusion 121a is formed on the inner wall of the outer cylinder 121. The elastic latch 111a is adapted to be latched onto the blocking protrusion 121a to prevent the first outer contact 110 from moving outwardly relative to the second outer contact 120, preventing the first outer contact 110 from disengaging from the second outer contact 120. In the shown embodiment, the elastic latch 111a is an L-shaped elastic hook adapted to hook the blocking protrusion 121a.
The first elastic element 130, as shown in FIGS. 1 and 2, is received in the receiving groove 123, a first end of the first elastic element 130 abuts against the first outer contact 110 and a second end of the first elastic element 130 abuts against the second outer contact 120.
The first outer contact 110 has a base 113, shown in FIG. 4, to which the elastic latch 111a and the elastic arm 112a are coupled. The first end of the first elastic element 130 abuts against the base 113. The base 113 has an annular plate shape. The elastic latch 111a is coupled to an outer edge of the base 113 and the elastic arm 112a is coupled to an inner edge of the base 113. In the shown embodiment, the first outer contact 110 includes a plurality of elastic latches 111a. The plurality of elastic latches 111a are evenly distributed around an outer circumference of the base 113. In the shown embodiment, the first outer contact 110 includes a plurality of elastic arms 112a. The plurality of elastic arms 112a are evenly distributed around an inner circumference of the base 113.
As shown in FIGS. 1-3, a raised positioning step 122a is formed on an outer wall of the inner cylinder 122, and the second end of the first elastic element 130 abuts against the positioning step 122a.
The connector, as shown in FIGS. 1 and 2, comprises an insulator 300 disposed between the outer contacts 110, 120 and the inner contacts 210, 220. The insulator 300 is configured to hold the inner contacts 210, 220 within the outer contacts 110, 120 and to electrically isolate the inner contacts 210, 220 from the outer contacts 110, 120. The insulator 300 is housed in the inner cylinder 122 of the second outer contact 120, and the second inner contact 220 is held within the insulator 300.
The connector, as shown in FIG. 2, comprises a second elastic element 230 disposed between the first inner contact 210 and the second inner contact 220. The second elastic element 230 is adapted to exert a second axial pushing force onto the first inner contact 210. The first inner contact 210 is in a reliable electrical contact with the first electronic component 1 under the second axial pushing force exerted by the second elastic element 230. The second inner contact 220 has a cylindrical portion 221. An end of the first inner contact 210 is slidably inserted into the cylindrical portion 221 of the second inner contact 220, and is in a slidable electrical contact with the second inner contact 220. The inner contacts 210, 220 form a spring-like probe structure such as a pogo pin, and the second elastic element 230 is compressed by the first inner contact 210 in the cylindrical portion 221 of the second inner contact 220.
As shown in FIG. 2, the second outer contact 120 and the second inner contact 220 each have a flat bottom face adapted to be soldered onto the second electronic component 2. In other embodiments, the second outer contact 120 or the second inner contact 220 may be otherwise connected to the second electronic component 2, for example, the second outer contact 120 or the second inner contact 220 may be inserted into or screwed onto the second electronic component 2.
A connector according to another embodiment is shown in FIGS. 5 and 6. The connector in the embodiment of FIGS. 5 and 6 differs from the embodiment shown in FIGS. 1-4 mainly in the structure of the second inner contact 220 and the outer cylinder 121 of the second outer contact 120.
In the embodiment shown in FIGS. 5 and 6, an outer diameter of a lower end portion 121b of the outer cylinder 121 of the second outer contact 120 is smaller than an outer diameter of an upper end portion of the outer cylinder 121. The lower end portion 121b of the outer cylinder 121 is adapted to be directly inserted into a socket on the second electronic component 2. The second inner contact 220 has a plug portion 220b that projects outwardly from the second outer contact 120, and the plug portion 220b may be plugged into the socket on the second electronic component 2.
In other embodiments, a threaded portion may be formed on an outer wall of the outer cylinder 121 of the second outer contact 120. The second outer contact 120 may be screwed onto the second electronic component 2 by the threaded portion.
Patent Application
20190305495
