CROSS-REFERENCE TO RELATED APPLICATION
This application claims the benefit of the filing date under 35 U.S.C. ยง119(a)-(d) of Chinese Patent Application No. 201610107435.5, filed on Feb. 26, 2016.
FIELD OF THE INVENTION
The present invention relates to a connector, and more particularly, to an electrical connector of a connector assembly.
BACKGROUND
In two connectors known in the art adapted to be mated with each other, a first connector has a plug, and a second connector has an insertion cavity; the plug is adapted to be inserted into the insertion cavity. A conductive terminal of the first connector is provided on the plug. A resilient arm of a conductive terminal of the second connector extends into the insertion cavity so as to elastically come into electrical contact with the conductive terminal of the first connector provided on the plug inserted into the insertion cavity.
During coupling of the first connector with the second connector, an electrical contact on the resilient arm slides a predetermined distance (a scratching distance) on a surface of the conductive terminal of the first connector, so as to scratch off an oxide layer on the surface of the conductive terminal of the first connector and ensure a good electrical contact. In the prior art, the conductive terminal of the first connector has to have a sufficient length in order to ensure that enough scratching distance exists between the conductive terminal of the first connector and the conductive terminal of the second connector. The conductive terminal of the first connector is thus relatively long, which results in a reduced resonant frequency, impedance mismatching, and reduced signal transmission performance when the first connector and the second connector are mated.
SUMMARY
An object of the invention, among others, is to provide a connector which improves resonance frequency and optimizes impendence when mated with another connector without reducing an effective scratching distance. The disclosed connector has an insulation body, a conductive terminal disposed on the insulation body, and a scratching terminal disposed on the insulation body. The scratching terminal is electrically isolated from the conductive terminal. An electrical contact of a mating conductive terminal of a mating connector comes into electrical contact with the scratching terminal before electrically contacting the conductive terminal during mating with the connector.
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 sectional side view of a first connector and a second connector according to the invention in a separated position;
FIG. 2 is a sectional side view of the first connector and the second connector in an intermediate position;
FIG. 3 is a sectional side view of the first connector and the second connector in a fully mated position;
FIG. 4 is a resonance curve of the first connector and the second connector; and
FIG. 5 is an impedance curve of the first connector and the second connector.
DETAILED DESCRIPTION OF THE EMBODIMENTS
Embodiments of the present invention will be described hereinafter in detail with reference to the attached drawings, wherein like reference numerals refer to the like elements. The present invention may, however, be embodied in many different forms and should not be construed as being limited to the embodiments set forth herein; rather, these embodiments are provided so that the disclosure will be thorough and complete, and will fully convey the concept of the invention to those skilled in the art.
A connector assembly according to the invention is shown generally in FIGS. 1-3. The connector assembly includes a first connector 1 and a second connector 2.
The first connector 1, as shown in FIG. 1, includes a first insulation body 10 and a first conductive terminal 100 disposed on the first insulation body 10. In the shown embodiment, the first connector 1 further includes a scratching terminal 110 provided on the first insulation body 10 and electrically isolated from the first conductive terminal 100 by a clearance 101. The clearance 101 has a predetermined width between adjacent end surfaces of the first conductive terminal 100 and the scratching terminal 110 so as to electrically isolate the first conductive terminal 100 from the scratching terminal 110. In the shown embodiment, the first connector 1 includes a plurality of the first conductive terminals 100 and a plurality of scratching terminals 110 corresponding to the plurality of the first conductive terminals 100.
The second connector 2, as shown in FIG. 1, includes a second insulation body 20 and a second conductive terminal 200 disposed on the second insulation body 20. In an exemplary embodiment, the second conductive terminal 200 extends into and is held on inner walls of an insertion cavity 22 formed in the second insulation body 20. In the shown embodiment, the second conductive terminal 200 is a resilient arm having an electrical contact 210. In the shown embodiment, the second connector 2 includes a plurality of the second conductive terminals 200 corresponding to the plurality of the first conductive terminals 100.
The first insulation body 10, as shown in FIG. 1, includes a convex end 12 adapted to be inserted into the insertion cavity 22 of second insulation body 20 of the second connector 2. The scratching terminal 110 and the first conductive terminal 100 are mounted on the convex end 12 of the first insulation body 10. In the shown embodiment, the convex end 12 of the first insulation body 10 has upper terminal retaining grooves 122 formed on an upper side surface thereof and lower terminal retaining grooves 124 formed on a lower side surface thereof; the plurality of the first conductive terminals 100 and the plurality of scratching terminals 110 are retained in the upper terminal retaining grooves 122 and the lower terminal retaining grooves 124 of the convex end 12, respectively.
In an exemplary embodiment, the first conductive terminal 100, the second conductive terminal 200 and the scratching terminal 110 are made from the same or different conductive materials. The first conductive terminal 100, the second conductive terminal 200 and the scratching terminal 110 may be made from the same or different metal materials, for example, all may be made from copper.
The first connector 1 is adapted to be inserted into the second connector 2, as described in greater detail below with reference to FIGS. 1-3.
When the first connector 1 is inserted into the second connector 2, the electrical contact 210 of the second conductive terminal 200 comes into electrical contact with the scratching terminal 110, as shown in FIG. 2, before electrically contacting the first conductive terminal 100, as shown in FIG. 3. During insertion of the first connector 1 into the second connector 2, as shown in FIGS. 1 and 2, the scratching terminal 110 and the first conductive terminal 100 keep stationary with respect to the first insulation body 10.
In a fully mated position of the first connector 1 and the second connector 2 shown in FIG. 3, the electrical contact 210 of the second conductive terminal 200 resiliently comes into electrical contact with the first conductive terminal 100. In the fully mated position, the electrical contact 210 of the second conductive terminal 200 is spaced a distance from the clearance 101 by a predetermined length L greater than zero. That is, the distance between the contact position of the first conductive terminal 100 and the electrical contact 210 of the second conductive terminal 200 and the clearance 101 is the predetermined length L. The size of the predetermined length L may be determined based on the lengths of the first and second conductive terminals 100 and 200. The predetermined length L may, for example, be in the range of 0.5 mm to 2 mm. Because the electrical contact 210 is separated from the clearance 101 by the predetermined length L, if an error between an intended insertion depth and an actual insertion depth is less than the predetermined length L, the electrical contact between the first conductive terminal 100 and the electrical contact 210 is still ensured.
By providing the scratching terminal 110 electrically isolated from the first conductive terminal 100, a sufficient scratching distance is allowed between the first connector 1 and the second connector 2. A length of the first conductive terminal 100 may be shortened, thereby improving a resonance frequency when the first connector 1 and the second connector 2 are mated together, as described with reference to FIG. 4 below. The shortened length of the first conductive terminal 100 also optimizes an impedance when the first connector 1 and the second connector 2 are mated together, as described with reference to FIG. 5 below, and improves a signal transmission performance.
As shown in FIG. 4, the curve A indicates the resonance curve of a first connector and a second connector mated together in the prior art, and the curve B indicates the resonance curve of the first connector 1 and the second connector 2 mated together of the claimed invention shown in FIG. 3. The resonance frequency A of the first connector and the second connector mated together in the prior art is substantially equal to 25.6 GHz, whereas the resonance frequency B of the first connector 1 and the second connector 2 mated together of FIG. 3 is larger than 40 GHz, thereby dramatically improving resonance frequency when the first connector 1 and the second connector 2 are mated together.
As shown in FIG. 5, the curve A indicates the impendence curve of the first connector and the second connector mated together in the prior art, and the curve B indicates the impendence curve of the first connector 1 and the second connector 2 mated together of FIG. 3. The impendence A of the first connector and the second connector mated together in the prior art is substantially equal to 76.6 ohm, whereas the impendence B of the first connector 1 and the second connector 2 mated together of FIG. 3 is substantially equal to 88.5 ohm, thereby dramatically optimizing the impendence curve when the first connector 1 and the second connector 2 are mated together.
Patent Application
20170250487
