Electrical connector with port light indicator

Description

FIELD OF THE INVENTION

The present invention relates to an electrical connector with improved performance. In particular, the present invention improves the performance of the port light indicators, the circuit boards, and shielding.

BACKGROUND OF THE INVENTION

Cables in a server or router, for example, are typically connected to a printed circuit board by plug connectors or modules at the ends of the cables which are inserted into mating receptacles mounted on the board. These connectors are usually soldered to the PCB by wave solder or pin in paste assembly processes. In some situations however, the addition of a wave solder process for the PCB assembly is not desired, particularly if surface mount components are assembled to the bottom side of the board. In addition, electromagnetic emissions may leak from the connection between the plug connector and its mating receptacle, or between the connector shield and the panel in which it is mounted. This electromagnetic radiation can cause problems in high speed data transmissions because the emissions negatively influence signal transmissions between the connectors. It can also create interference problems with other nearby devices if internal electromagnetic emissions radiate around the connector into the external environment.

Therefore, a need exists for a printed circuit board connector with improved performance, press fit terminations, port light indication, and shielding.

SUMMARY OF THE INVENTION

Accordingly, the present invention may provide an electrical connector that includes a housing that has an interface side and a printed circuit board engagement side. At least one internal circuit board is received in the housing and at least one port is at the interface side of the housing. The port is adapted to receive a mating connector. The at least one port includes at least one signal contact connected to the internal circuit board. The signal contact is configured to mate with a corresponding contact of the mating connector. The internal circuit board has at least one terminal with a tail end that extends though the printed circuit board engagement side of the housing. At least one port light indicator is adjacent the at least one port. The at least one port light indicator has a light element facing outwardly at the interface side of the housing and a terminal end opposite the light element. At least one spring element is received in the housing. At least one spring element has a contact end and an opposite press-fit end. The contact end is biased against and in contact with the terminal end of the at least one port light indicator. The press-fit end extends through the printed circuit board engagement side of the housing. In a preferred embodiment, the light element is an LED.

The present invention may also provide an electrical connector that includes a housing that has an interface side and a printed circuit board engagement side. A plurality of ports are at the interface side of the housing. Each of the plurality of ports is adapted to receive an individual mating connector and each includes a plurality signal contacts connected to an internal circuit board. The signal contacts are configured to mate with corresponding contacts of the individual mating connectors, respectively. Each of the internal circuit boards has a plurality of terminals. Each of the terminals has a tail end that extends though the printed circuit board engagement side of the housing. A plurality of port light indicators are adjacent the plurality of ports, respectively. Each of the port light indicators has a light element facing outwardly at the interface side of the housing and a terminal end opposite the light element. A plurality of spring elements are received in the housing. Each of the plurality of spring elements has a contact end and an opposite press-fit end. Each of the contact ends is biased against and in contact with one of the terminal ends of the plurality of port light indicators. The press-fit ends extend through the printed circuit board engagement side of the housing.

Other objects, advantages and salient features of the invention will become apparent from the following detailed description, which, taken in conjunction with the annexed drawings, discloses a preferred embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS

A more complete appreciation of the invention and many of the attendant advantages thereof will be readily obtained as the same becomes better understood by reference to the following detailed description when considered in connection with the accompanying drawings, wherein:

FIG. 1 is a perspective view of an electrical connector according to an exemplary embodiment of the present invention, showing a mating component being inserted into the connector;

FIG. 2 is a bottom perspective view of the electrical connector illustrated in FIG. 1;

FIG. 3 is a perspective end view of the electrical connector illustrated in FIG. 1, showing the connector with its housing removed;

FIG. 4 is a perspective cross-sectional view of the electrical connector taken along line 4-4 of FIG. 2, showing port light indicators and associated insert springs;

FIG. 5 is a side cross-sectional elevational view of the electrical connector similar to FIG. 4; and

FIG. 6 is a perspective cross-sectional view similar to FIG. 4, showing an alternative exemplary embodiment of the present invention.

DETAILED DESCRIPTION OF THE EXEMPLARY EMBODIMENTS

Referring to FIGS. 1-6, the present invention provides an electrical connector 100 that is designed to be connected to a main printed circuit board 102 and receive one or more mating connectors 104. In a preferred embodiment, the electrical connector is an RJ series type connector in a 2×2 configuration that receives RJ series plugs.

As seen in FIG. 1, the connector 100 generally includes a housing 110 that has at least one side 112 that engages the main printed circuit board 102 and another side 114 that interfaces with the mating connectors 104. Built into the housing 110 are one or more connector ports 120 that individually receive the mating plugs 104. The ports 120 include light indicators 122 that when illuminated signify that the connector is positively electrically connected to the main printed circuit board 102 and ready to receive the mating plugs. The port light indicators 120 are configured to provide flexibility and tolerance with respect to the mechanical connection to the main printed circuit board 102 to avoid damage to the indicators while also reducing costs.

The housing 110 includes a frame 126 with an outer conductive shell 128 surrounding the frame 126. The connector ports 120 are formed in the frame 126 such that the access openings 130 of the ports 120 are at the interface side 114 of the housing 110, as seen in FIGS. 1 and 2. The inner receiving area of each port 120 is preferably shaped to accept a standard RJ plug. However, the ports 120 may be shaped to receive various types of plugs, as desired. The housing 110 also includes a plurality of internal circuit boards associated 132 with each of its ports 120. Each internal circuit board 132 includes one or more signal contacts 134 that correspond to the signal contacts of the mating plug 104. The signal contacts 134 may be formed as spring members extending from near one end 136 of the board 132, as seen in FIG. 3. In a preferred embodiment, the internal circuit boards 132 include eight signal contacts 134 to match those of the RJ series mating plug 104. Each internal circuit board 132 also includes one or more terminals 138 associated with each of the signal contacts 132 and connectable to the main printed circuit board 102 at their tails ends 140. The terminals 138 connect to the boards 132 near a second end 142 thereof remote from the first end 136. The circuitry of each internal circuit board 132 is such that capacitance is improved to meet CAT5e performance. The capacitance may be induced by the shape and form of the signal traces which are placed in close proximity to each other on the PCB. The internal circuit boards 132 are supported in a cantilever fashion by a rear portion 144 of the frame 126 of the housing 110, as best seen in FIG. 3, such that the signal contacts 134 are near the interface side 114 (FIG. 1) of the housing 110 and exposed in the respective ports 120 to connect to the corresponding contacts of the mating plug. The terminals 138 extend through the rear portion 144 of the housing frame 126 and through the printed circuit board mating side 112 of the housing. The tail ends 140 (FIG. 2) of the terminals 138 are preferably eye-of-the-needle (EON) type that may be press-fit into the main printed circuit board 102.

In a preferred embodiment, the ports 120 of the housing 110 are arranged in 2×2 configuration, as seen in FIGS. 1 and 2. In such a configuration, the internal circuit boards 132 are oriented between a first group of two ports 120a (FIG. 2) and a second group of two ports 120b (FIG. 2). The internal circuit boards 132 are also oriented such that the signal contacts 134 for the first group of ports 120a face away from the signal contacts 134 for the second group of ports 120b. For example, the groups of ports 120a and 120b may be stacked one on top of the other such that the first group of ports 120a define lower ports and the second group of ports 120b define upper ports, as shown in FIG. 2. In that case, the printed circuit board engagement and interface sides 112 and 114 are generally perpendicular to one another, two of the internal circuit boards 132 face downwardly into the lower ports 120a, and the other two internal circuit boards 132 face upwardly into the upper ports 120b. Also, in that case, the terminals 138 of the two internal circuit boards 132 for the upper ports 120b are be longer than the terminals 138 of the two boards for the lower ports 120a in order to reach the main printed circuit board 102. Alternatively, the two groups of ports 120a and 120b may be side-by-side instead of stacked one on top of another. In that case, the printed circuit board engagement and interface sides 112 and 114 would be generally parallel, the internal circuit boards 132 would be oriented vertically rather than horizontally, and the first group of portions 120a would be located between the printed circuit board side 112 of the housing and the second group of ports 120b.

The port light indicators 122 when illuminated give a visual indication that the housing 110, and particularly the ports 120, are electrically coupled to the printed circuit board 102. Thus when illuminated, one or more of the mating plugs 104 (FIG. 1) can be electrically connected to the main printed circuit board 102. In particular, when one of the mating plugs 104 is inserted into one of the ports 120, the mating plug 104 is electrically connected to the main printed circuit board 102 via the signal contacts 134 of the internal circuit boards 132 engaging the mating plug's contacts, the internal circuit board 132 electrically coupling the signal contacts 134 with the terminals 138, and the terminals 138 coupling with the printed circuit board 102 by the press-fit tails 140.

Each port 120 preferably has at least one port light indicator 122. The port light indicators 122 are positioned to face outwardly from the interface side 114 of the housing 110. The port light indicator 122 may be positioned adjacent the respective port 120, that is either directly next to or close by the port 120. In a preferred embodiment, the housing frame 126 includes a receiving area 129 designed to accommodate the indicator 122 adjacent the port 120. Each light indicator 122 is electrically coupled to the main printed circuit board 102 by a spring insert 160. Each light indicator 122 includes a light element end 150 and an opposite terminal end 152 with an extension portion 154 therebetween. The light element end 150 includes a light element 156, such as an LED. Each spring insert 160 includes first and second opposite ends 162 and 164 with an intermediate body portion 166 therebetween. The first end 162 is preferably biased against the terminal end 152 of the port light indicator 122. The first end 162 may be shaped as a rounded hook, as seen in FIG. 4, or have a gull wing profile. The second end 164 extends through the printed circuit board engagement side 112 of the housing 110. The second end 164 preferably includes an eye-of-the-needle (EON) configuration for press-fitting into the main printed circuit board 102. Because of the spring nature of the inserts 160, flexibility and tolerance is provided such that slight movement of the housing 110 can be tolerated while the port light indicators 122 remain illuminated. Moreover, the flexible nature of the spring inserts 160 along with the press-fit engagement of its ends 164 with the printed circuit board 102 reduce the chance of damage that may be done to the port light indicator 122 because it is connected to the board 104. That also allows the material of the press fit ends to be different than the steel lead frame of the lighting side. For example, that allows the use of a material with good spring properties for the EON ends.

In the exemplary embodiment of the connector being arranged with lower and upper ports 120a and 120b, the intermediate body portion 166 of the spring insert 160 for the upper ports 120b will be longer the intermediate body portion 166 of the spring insert 160 for the lower ports 120a in order for the second end 164 to reach the main printed circuit board. Moreover, the terminal ends 152 of the port light indicators 122 may include a right hand bend 155 (FIG. 5) in order to provide a contact area 158 for engaging the contact ends 162 of the spring inserts 160, as seen in FIGS. 4 and 5. The contact areas 158 (FIG. 5) generally face the rear of the housing 110 away from housing interface side 114. The terminals ends 152 of the port light indicators 122 for the lower ports 120a extend upwardly and the terminal ends 152 of the port light indicators 122 of the upper ports 120b extend downwardly.

EMI spring fingers 170 may be provided at the interface side 114 of the housing for improved shielding. In particular, a strip of the spring fingers 170 may be disposed on the shell 128 at each of the end edges of the housing interface side 114, as seen in FIGS. 1 and 2. A spring arm 172 may be provided in each port 120 to help retain the mating plug 104 therein. The outer shell 128 may include alignment pins 174 at the print circuit board engaging side 112 of the housing 112 to facilitate location of the housing 110 on the main printed circuit board 102. Locking members 176 may also be provided at the printed circuit board engagement side 112 of the housing 110 that interlock with the printed circuit board 102.

FIG. 6 illustrates another exemplary embodiment of the present invention in which the electrical connector 100′ is substantially the same as the connector 100, except that it includes multiple port light indicators 122 for each port 120. As seen in FIG. 6, a plurality of insert springs 160 are provided that engage respective port light indicators 122 of the first set of ports 120a and the second set of ports 120b. The port light indicators 122 are preferably adjacent one another, as seen in FIG. 6; however, the port light indicators 122 may be spaced from one another, such as being located at opposite corners of a respective port 120.

While a particular embodiment has been chosen to illustrate the invention, it will be understood by those skilled in the art that various changes and modifications can be made therein without departing from the scope of the invention as defined in the appended claims. For example, any number of ports 120, including only one port 120, may be provided, along with any number of associated port light indicators 122. Also, the ports 120 may be arranged in any fashion, such as stacked or side-by-side.