CN2817114Y

CN2817114Y - Metallic shield gain USB connector

Info

Publication number: CN2817114Y
Application number: CN 200520041463
Authority: CN
Inventors: 郑永祺; 吴慈怀
Original assignee: Shanghai Huanda Computer Technology Co Ltd; Mitac International Corp
Current assignee: Shanghai Huanda Computer Technology Co Ltd; Mitac International Corp
Priority date: 2005-05-12
Filing date: 2005-05-12
Publication date: 2006-09-13
Anticipated expiration: 2015-05-12

Abstract

The utility model relates to a USB connector gained by a metallic shield, which comprises an insulating body, a hollow metal casing, a plurality of terminals, a plurality of leads and a metallic shield object, wherein a plurality of longitudinal slot holes are arranged in the insulating body; the hollow metal casing is provided with two openings which are arranged on the relative ends, and one end is an inserting end which is used for being inserted by the insulating body; a plurality of terminals can be respectively contained in the corresponding slot holes; a plurality of leads comprise a plurality of power cords and a plurality of signal transmission lines, and each lead is connected with one end of the corresponding terminal; a plurality of signal transmission lines are coated by the metallic shield object along the direction of a plurality of signal transmission lines in order to avoid the electromagnetic interference of a plurality of power cords.

Description

The USB connector of metallic shield gain

Technical field

The utility model is particularly to the USB connector that a kind of metallic shield that can avoid the interference of electromagnetic field and noise to produce gains relevant for a kind of USB connector.

Background technology

Connector is widely used on computers, yet, main frame and interface equipment are (as keyboard, mouse, printer etc.) all use the connector of specification separately, to such an extent as to universal serial bus structural USB (Universal Serial Bus) agreement is stipulated in the common research and development of some manufacturers, and utilize according to this on connector, USB connector mainly supplies main frame and its interface equipment or other compatible electric equipment products (as phone) of personal computer, do signal, the usefulness of power delivery, and this USB connector and its interface are different from employed pci interface of known computer and scsi interface, and it can provide the connectivity port that reaches 127 to use.

USB can be divided into USB 1.1 and USB2.0 at present, and USB 1.1/2.0 device, can be divided into two kinds of A type USB connector and Type B USB connector again, it all can adopt the mode of power supply voluntarily, that is to say the power supply unit of oneself, also can adopt and power, that is to say from interface and eat the power supply that other product provides from bus.

The interface equipment of current application USB 1.1 is used two kinds of different speed: 12Mbps (at full speed) and 1.5Mbps (at a slow speed), and the highest 480Mbps that can reach of transmission speed in USB2.0 generation, that is to say 480Mbits/ per second (equaling the 60MBytes/ per second after the conversion), if will transmit the data of 1GB, in that just also only need after the conversion within 1 minute can end of transmission, these not still at present 40 times of USB 1.1 versions, and exceed in the 400Mbps of present another kind of coffret IEEE1394.

But, the increase of data rate, though brought many benefits, brought various new design challenge for also USB 2.0 device manufacturers, particularly aspect " signal quality " problem, run the layout of line as circuit board, signal jitter, signal rises and signal fall time, the problem of the interference of electromagnetic field (EMI), noise problem or ground signalling quality are bad etc., moreover, the test of amount of resistance measured value also is a stubborn problem, because the high signal rate of USB 2.0 high speed transfer modes, so make the impedance of circuit and encapsulation become very important key parameter, for example, connector is in certain distance, and impedance should be between 70 ohm and 110 ohm, connecting line also requires to meet specific impedance ranges in addition, and these are limited and require to can be 90 ohm ± 15%.

Therefore, how to make some changes and just need face the problem that overcomes for many manufacturers with the Valuation Standard that meets USB 2.0 in known USB connector structure.

For example, as shown in Figure 1, USB connector and primary clustering thereof for known A type, it includes an insulating body 10, a metal shell 11,4 terminals 12 and be coated on the glue shell 13 in these metal shell 11 outsides side by side, these terminals 12 are arranged in this insulating body 10, and its outer end is connected to lead 14, this insulating body 10 is provided with projection 100 in addition, have on this metal shell 11 hole clipping 110 that should projection 100 places, in order to the projection 100 established on this insulating body 10 of arranging in pairs or groups in order to assembling.

In above-mentioned known USB connector; 14 li in the wherein existing lead that is connected with 4 terminals 12 side by side respectively; between central authorities' lead and lead side by side in both sides; having there is no any material does and covers; when therefore the ampere wires in both sides has electric current to pass through fast; the interference of electromagnetic field that it produced (EMI) phenomenon; regular meeting makes two holding wires in the middle of being positioned at produce noise; and easily take the noise of link device out of; meeting and then make that the usefulness of this USB connector is influenced; and; because the high signal rate of USB 2.0 high speed transfer modes; the impedance of its circuit and encapsulation has just become very important key parameter; therefore; according to the above, known USB connector can't satisfy the required solution interference of electromagnetic field (EMI); the ground signalling quality is bad; the demand of problems such as the impedance collocation of circuit and encapsulation and noise.

And above these structures because of known USB connector, and the problem that high signal rate produced of can't arranging in pairs or groups, all having become present engineering staff is to meet the high speed data transfer environment to be badly in need of facing the problem of solution, that is to say, address the above problem to keep certain signal quality, system makes USB 2.0 devices meet the specification, and obtains USB 2.0 " authentication marks " to meet the important key of high speed data transfer environment.

Summary of the invention

Have some problems to be solved thoughts on the above known USB connector, the purpose of this utility model promptly is to provide the USB connector of an improvement, by providing shield effectiveness to wherein being positioned at two inboard holding wires, so that its electromagnetic interference that not produced by the both sides power line influences, and make it can not take the noise of link device out of, with so meet the requirement of USB standard authentication, meet the high speed data transfer environment.For achieving the above object, the USB connector of the metallic shield gain that the utility model adopted comprises: an insulating body has several slotted eyes longitudinally in this insulating body; The metal shell of one hollow has two opposite end openings, and wherein an end is an insertion end, inserts for this insulating body; Several terminals, can be placed in respectively respectively should the slotted eye of correspondence in; Several leads comprise several power lines and several signal transmssion lines, and each this lead connects with an end of terminal that respectively should be corresponding; And a metal shield, along these several signal transmssion line directions these several signal transmssion lines are coated together.

The utility model really can coat several signal transmssion lines by metal shield, reaches the electromagnetic interference that avoids being subjected to several power lines, and avoids taking out of the purpose and the effects such as noise of link.

Description of drawings

For the above-mentioned of utility model and other purpose, feature and advantage can be become apparent, preferred embodiment cited below particularly, and cooperate appended graphicly, be described in detail below.

Fig. 1 shows the USB connector and the primary clustering thereof of known A type;

Fig. 2 shows a preferred embodiment of the utility model USB connector; And

Fig. 3 shows another preferred embodiment of the utility model USB connector.

Embodiment

Relevant the utility model is to reach technological means and the effect thereof that above-mentioned purpose adopts, and enumerates preferred embodiment now and conjunction with figs. is described as follows:

At first, please consult Fig. 2 earlier, it is depicted as a preferred embodiment of the utility model USB connector, identical with other person of commonly using substantially, mainly include an insulating body 16, several terminals 18, the lead 20, a metal shield 22, the metal shell 24 that are connected with several terminals 18 respectively and be coated on the outer outside glue shell 26 of metal shell, wherein:

This insulating body 16 is a longitudinal bodies, has a surface, in it, be provided with four terminal grooves (figure does not show), these four terminal grooves are all along the length direction of insulating body, and can hold a terminal respectively, this surface have one first end 28 and with the first end second opposed end 30, on this surface, be provided with two separately projections 32 near these first end, 28 places.

This several terminals 18 is provided with 4 terminals for the terminal groove on the corresponding insulating body 16, two outer terminal (18a, 18d) that are set to of these 4 terminals are all grown (18b, 18c) than inner terminal, two long outer terminal (18a, 18d) are power source supply end, be respectively VBus terminal 18d and GND terminal 18a, inner terminal then for signal transmit circuit+Data and-Data (18b, 18c), this is all the usb protocol defined, is not giving unnecessary details in this.

Several leads 18 that are connected respectively with these four terminals, can be divided into the VBus lead 20d that is connected with the VBus terminal, the GND lead 20a that is connected with the GND terminal, be connected+Data lead and be connected-Data lead (20b with-Data terminal with+Data terminal, 20c), wherein can comprise two ground wires among the GND lead 20a again, and inboard+Data lead with-Data lead can in strand (20b, 20c).

This metal shell 24, it is the square hollow housing that there is opening one or two opposite end, the size dimension of this metal shell 24 is matched with this insulation shell 16, this insulation shell 16 can be placed in wherein, this metal shell 24 has an insertion end 34, in present embodiment, this insertion end 34 is inserted in the metal shell 24 for holding thus for insulating body 16, and two projection places 32 of metal shell 24 corresponding insulating bodies 16 are respectively equipped with a hole clipping 36.

And, the metal shield 22 that promptly is the utility model and is comprised with known difference, its aluminium foil of forming by aluminium in present embodiment, its with the inboard should in two holding wires+Data lead and-Data lead (20b of strand, 20c), the ground wire 21 among this GND lead 20a is coated on wherein, make strand in this two holding wires+Data lead with-(20b 20c) avoids being subjected to the interference of outside GND lead 20a and VBus line 20b to the Data lead, and avoids taking out of the noise of link.

Moreover, the program of the utility model embodiment combination shown in Figure 2 is identical with other person of commonly using substantially, when above-mentioned insulating body 16, after several terminals 18 and metal shell 24 assemblings, can be with the VBus terminal, the GND terminal, + Data terminal and-Data terminal (18a, 18b, 18c, 18d) respectively with the VBus lead, the GND lead, + Data lead and-Data lead (20a, 20b, 20c, 20d) electrically connect, wherein strand+Data lead and-Data lead (20b, a ground wire 21 is coated in the metal shield 22 20c) and among the GND lead 20a, after several terminals 18 electrically connects with lead 20 respectively, just can outside metal shell 24, coat a glue shell 26 and moulding.

Please consult Fig. 3 again, be another preferred embodiment of the utility model, it is the Type B USB connector of an improvement, it includes an insulating body 38 equally, several terminals 40, the lead 42 that is connected with several terminals 40 respectively, one metal shield 44, one metal shell 46, and be coated on the outer outside glue shell 48 of metal shell 46, itself and A type connector main difference be in, the arrangement mode of its terminal 40 is not the arrangement for same plane formula, but arrange in the mode that changes extremely up and down in twos, cause the cross section of its connector slightly to be a rectangle, but, these several terminals 40 corresponding leads 42, in present embodiment, still have this metal shield 44 be coated on strand in this+Data lead and-Data lead 42a and GND lead on the ground wire 41, in order to avoid be subjected to the interference of outside GND lead and VBus line 42b, and avoid taking out of the noise of link, the mode that makes up by button on other metal shell 46 and the insulating body 38, with and outside glue casing forming mode all identical with A type connector, just repeat no more at this.

Comprehensive the above, the utility model really can by with interior strand+Data lead and-Data lead and GND lead in a ground wire coat with a metal shield, reach the interference that avoids being subjected to outside GND lead and VBus line, and the purpose and the effects such as noise of avoiding taking out of link, so patent application is proposed.

Described person only is the utility model preferred embodiment wherein, is not to be used for limiting practical range of the present utility model; Be that all equalizations of doing according to the utility model change and modification, be all the utility model rights protection scope and contain.

Claims

1. the USB connector of metallic shield gain is characterized in that comprising:

One insulating body has several slotted eyes longitudinally in this insulating body;

The metal shell of one hollow has two opposite end openings, and wherein an end is an insertion end, inserts for this insulating body;

Several terminals, can be placed in respectively respectively should the slotted eye of correspondence in;

Several leads comprise several power lines and several signal transmssion lines, and each this lead connects with an end of terminal that respectively should be corresponding; And

One metal shield coats these several signal transmssion lines together along these several signal transmssion line directions.

2. the USB connector of metallic shield gain according to claim 1, it is characterized in that: this metal shield is made up of aluminium.

3. the USB connector of metallic shield gain according to claim 1, it is characterized in that: in the several terminals that comprises this metal shield is arranged at this slotted eye, and after this insulating body inserts this metal shell, coat and form USB connector with the plastics injection molding.

4. the USB connector of metallic shield gain according to claim 1, it is characterized in that: strand together in these several signal transmssion lines.