1. Field of the Invention
The present invention relates to a connector, and more particularly to a crosstalk-proof plug connector preventing crosstalk and improving signal transmission stability.
2. Description of Related Art
Conventional Universal Serial Bus (USB) 2.0 connectors are popularly used in various electronic devices. However, USB 2.0 protocol only allows a maximum transmission speed of 480 Mbps. Because electronic devices are constantly developed to increase transmission speeds, the USB 2.0 protocol does not meet current transmission speed requirement of new electronic devices. Therefore, the USB Implementers Forum (USB IF) established USB 3.0 protocol, with a theoretical maximum transmission speed of 5 Gbps.
However, a USB 3.0 connector having two rows of terminals is structurally complicated so that manufacturing a USB 3.0 connector is difficult. Due to the rows of terminals and other constraints USB 3.0 connectors are generally longer and broader than USB 2.0 connectors. Furthermore, the terminals of the USB 3.0 connector generate crosstalk and interfere with each other when transmitting high frequency signals. Therefore, the USB 3.0 connector has a low production rate and a high manufacturing cost.
To overcome the shortcomings, the present invention provides a crosstalk-proof plug connector to mitigate or obviate the aforementioned problems.
The main objective of the invention is to provide a crosstalk-proof plug connector that prevents crosstalk and improves signal transmission stability.
A crosstalk-proof plug connector in accordance with the present invention has an insulating housing, a mounting bracket, multiple first terminals, multiple second terminals and a shell. The first terminals are mounted on the insulating housing. The second terminals are mounted on the mounting bracket. Each terminal has a mounting section, a soldering section and a contacting section. The soldering sections are arranged in a transverse row with a specific sequence to prevent crosstalk interfering with signal transmission.
Other objectives, advantages and novel features of the invention will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings.
With reference to
The crosstalk-proof plug connector of the first embodiment is a surface mount technology (SMT) type crosstalk-proof plug connector and comprises an insulating housing (10), a mounting bracket (20), multiple first terminals (30), multiple second terminals (40) and a shell (50).
With further reference to
The base (11) has a front end, a rear end, a top and a bottom and may further have a fastening slot (111), a positioning slot (113), multiple first engaging elements, multiple positioning grooves (112) and multiple assembling protrusions (116). The fastening slot (111) is defined in the base (11). The positioning slot (113) is defined in the base (11) behind the fastening slot (111) and has an inner top surface. The first engaging elements are formed on the inner top surface and may be multiple teeth (115) and multiple keyways (115a) arranged alternately. The positioning grooves (112) are defined in the top of the base (11). The assembling protrusions (116) are formed on and protrude downward from the bottom and may be mounted through assembling holes in a printed circuit board or a bracket in the aforementioned cable or portable device.
The tongue (12) is formed on and protrudes forward from the front end of the base (11) and has a top and a bottom.
The mounting bracket (20) is a separate component from the insulating housing (10), is mounted on the insulating housing (10) and has a mount (21) and an extension member (22).
The mount (21) may be mounted in the fastening slot (111) of the insulating housing (10).
The extension member (22) is formed on and protrudes backward from the mount (21), may be mounted in the positioning slot (113) of the insulating housing (10) and may have a top surface, a bottom surface, a rear end, multiple second engaging elements and a mounting protrusion (23). The second engaging elements are formed on the bottom surface, respectively engage the first engaging elements and may be multiple keyways (225) and multiple teeth (225a) arranged alternately and respectively engaging the teeth (11) and keyways (115a) of the insulating housing (10). The mounting protrusion (23) is formed on and protrudes from the top surface.
The first terminals (30) are mounted through the insulating housing (10) by an insert-molding process and are capable of implementing USB 2.0 signal transmission. Each first terminal (30) has a mounting section (31), a soldering section (32) and a contacting section (33).
The mounting section (31) is mounted securely in the insulating housing (10).
The soldering section (32) is formed on and protrudes downward from the mounting section (31) and out of the rear end of the base (11).
The contacting section (33) is formed on and protrudes forward from the mounting section (31) and may be mounted on the top of the tongue (12).
The second terminals (40) are mounted through the mounting bracket (20) by an insert-molding process, are capable of cooperating with the first terminals (30) to implement USB 3.0 signal transmission and may be mounted respectively in the positioning grooves (112) to prevent inadvertent transverse shift. Each second terminal (40) has a mounting section (41), a soldering section (42) and a contacting section (43).
The mounting section (41) is mounted securely in the mounting bracket (20).
The soldering section (42) is formed on and protrudes downward from the mounting section (42) and out of the rear end of the extension member (22).
The contacting section (43) is formed on and protrudes forward from the soldering section (42) and is located above the tongue (12) of the insulating housing (10).
The shell (50) covers the insulating housing (10), the mounting bracket (20), the first terminals (30) and the second terminals (40), has a cavity (500) and may further have a front end, a rear end, a top plate (51), two side plates (52), a bottom plate (53) and an open slot (513).
The cavity (500) is defined through the shell (50) and may hold a tongue of a corresponding socket connector.
The top plate (51) has a rear end.
The side plates (52) are formed on and protrude downward from the top plate (51).
The bottom plate (53) is formed between the side plates (52).
The open slot (513) is defined in the top plate (51) adjacent to the rear end and holds the mounting protrusion (23) of the mounting bracket (20).
In one of important aspects of the present invention, the first terminals (30) include a pair of USB 2.0 signal terminals and at least one non-signal-transmission terminal (such as power terminals and grounding terminals). The second terminals (40) include at least one pair of signal receiving terminals, at least one pair of signal transmitting terminals and at least one non-signal-transmission terminal (such as power terminals and grounding terminals). The soldering sections (32, 42) of all of the first and second terminals (30, 40) are arranged in a transverse row relative to the insulating housing (10). The soldering section (32) of the at least one non-signal-transmission terminal of the first terminals (30) is located between the soldering sections (42) of one pair of the signal transmitting terminals and the soldering sections (32) of the pair of the USB 2.0 signal terminals. The soldering section (32, 42) of the at least one non-signal-transmission terminal of the first or second terminals (30, 40) is located between the soldering sections (42) of one pair of the signal receiving terminals and the soldering sections (32) of the pair of the USB 2.0 signal terminals.
In a preferred embodiment of the crosstalk-proof plug connector, the first terminals (30) are numbered as No. 5, 6, 7, 8 and 9 terminals (5, 6, 7, 8, 9) that are defined respectively as a super-speed negative signal receiving terminals (the aforementioned signal receiving terminal), a super-speed positive signal receiving terminal (the aforementioned signal receiving terminal), a signal-return-grounding terminal (the aforementioned grounding terminal), a super-speed negative signal transmitting terminal (the aforementioned signal transmitting terminal) and a super-speed positive signal transmitting terminal (the aforementioned signal transmitting terminal).
The second terminals (40) are numbered as No. 4, 3, 2 and 1 terminals (4, 3, 2, 1) that are defined respectively as a power-return-grounding terminal (the aforementioned grounding terminal), a positive signal terminal (the aforementioned USB 2.0 signal terminal), a negative signal terminal (the aforementioned USB 2.0 signal terminal) and a power terminal. The soldering sections (32, 42) of all terminals (30, 40) in the transverse row are arranged according to a sequence of No. 5, 6, 4, 7, 3, 2, 1, 8 and 9 terminals (5, 6, 4, 7, 3, 2, 1, 8, 9) from a left side to a right side of the crosstalk-proof plug connector.
The following Table A is based on Section 5.3.1.2 of “USB 3.0 Specification, Revision 1.0” set forth by the USB IF. The Specification may be downloaded from the USB IF website: http://www.usb.org/home.
The definitions of the aforementioned first and second terminals (30, 40) are shown in Table A for clarity and convenience.
With further reference to
With reference to
With reference to
With further reference to
With further reference to
The present invention has the following advantages:
1. The soldering sections (32, 32a, 42, 42a) of the non-signal-transmission terminal (1, 4, 7) are between adjacent pairs of the soldering sections (32, 32a, 42, 42a) of the signal transmitting or receiving terminals (2, 3, 5, 6, 8, 9) to prevent crosstalk and improve signal transmission stability.
2. The insulating housing (10) and mounting bracket (20) are separate components instead of being formed together so that designing and manufacturing a mold for each component is easy and cheap when compared to a structurally complicated mold for molding an one-piece insulating housing holding all terminals of a conventional connector. Thus, manufacturing costs of the crosstalk-proof plug connector are lowered.
3. The first and second engaging elements engaging each other quickly align and assemble the insulating housing (10) and the mounting bracket (20).
Even though numerous characteristics and advantages of the present invention have been set forth in the foregoing description, together with details of the structure and function of the invention, the disclosure is illustrative only. Changes may be made in the details, especially in matters of shape, size, and arrangement of parts within the principles of the invention to the full extent indicated by the broad general meaning of the terms in which the appended claims are expressed.
Number | Date | Country | Kind |
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098129217 | Aug 2009 | TW | national |