CN102544920A

CN102544920A - Cable

Info

Publication number: CN102544920A
Application number: CN2010105994246A
Authority: CN
Inventors: 许世法
Original assignee: Kunda Computer Technology Kunshan Co Ltd
Current assignee: Kunda Computer Technology Kunshan Co Ltd
Priority date: 2010-12-22
Filing date: 2010-12-22
Publication date: 2012-07-04

Abstract

The invention provides a cable which comprises a first plug, a second plug and a switch module; wherein the first plug comprises a first VBUS (Video Bus) pin, a first D+ pin, a first D- pin, a first GND (Ground) pin and a first ID (Identity) pin; the second plug comprises a second VBUS pin, a second D+ pin, a second D- pin, a second GND pin and a second ID pin, wherein the second VBUS pin, the second D+ pin, the second D- pin and the second GND pin are respectively connected with the first VBUS pin, the first D+ pin, the first D- pin and the first GND pin; the switch module comprises a ground terminal and a movable terminal; the ground terminal is grounded; and the movable terminal are selectively in contact with the first ID pin or the second ID pin. According to the invention, the switch module is additionally arranged between the first plug and the second plug, and the position of the movable terminal is switched through the switch module, so that the movable terminal can be selectively in contact with the first ID pin or the second ID pin to ensure that the first ID pin or the second ID pin is grounded and users are prevented from plugging repeatedly during connection.

Description

Cable

[technical field]

The present invention relates to a kind of cable, the cable that particularly a kind of person of avoiding the use of plugs repeatedly when connecting.

[background technology]

USB OTG is the abbreviation of USB On-The-Go, is the technology that developed recently gets up, and is announced by USB Implementers Forum December 18 calendar year 2001, is mainly used in the connection between various equipment or mobile device, carries out exchanges data.Particularly PDA, mobile phone, consumer devices.Change like multiple different systems connectors of equipment room such as digital camera, video camera, printers the nearly inconvenience of exchanges data between the storage card of 7 kinds of standards.The development of USB technology makes PC and peripheral equipment various device to be linked together through the manufacturing cost of plain mode, appropriateness, and above-mentioned we mention application, can pass through usb bus, as the periphery of PC, under the control of PC, carry out exchanges data.But this exchanged form easily, in case left PC, each equipment room can't utilize the USB mouth to operate, because neither one equipment can serve as the same Host of P C.On-The-Go, promptly the OTG technology is exactly to be implemented under the situation that does not have Host, realizes that the data of equipment room transmit.For example digital camera is directly connected on the printer, through the OTG technology, connects two USB mouths that equipment is seen, the photograph of taking is printed immediately; Also can the data in the digital camera be sent to through OTG on the portable hard drive of USB interface, field operation just there is no need to carry expensive storage card, perhaps carries on the back a portable computer.

The USB otg standard has increased power management (saving power consumption) function on the basis of complete compatible USB2.0 standard, its permission equipment both can be used as main frame, also can be used as peripheral hardware operation (dual-purpose OTG).The OTG double-duty plant meets the USB2.0 standard fully, and certain main frame detectability can be provided, and supports main frame circular order agreement (HNP) and session request agreement (SRP).In OTG, Initial master equipment is called A equipment, and peripheral hardware is called B equipment.The connected mode of available cable decides initial roles, and double-duty plant uses novel mini-AB socket, thereby makes mini-A plug, mini-B plug and mini-AB socket increase the 5th pin (ID), to be used to discern different cable end points.ID pin ground connection in the mini-A plug, the ID pin in the mini-B plug is floating empty.When the ID pin of ground connection was arrived in the OTG Equipment Inspection, what expression was given tacit consent to was A equipment (main frame), detected the floating empty equipment of ID pin and then thought B equipment (peripheral hardware).System is in case after connecting, the role of OTG can also change.Main frame and peripheral hardware adopt new HNP, and A equipment partly provides the VBUS power supply as default host, and when the equipment that detected connects reset bus, enumerate and dispose B equipment.Otg standard is that second New Deal that USB increases is called session request agreement (SRP).SRP allows B device request A equipment to open the VBUS power supply and start once dialogue.An OTG dialogue can provide the time of VBUS power supply to confirm (annotate: A equipment is always the VBUS power supply, even as peripheral hardware) through A equipment.Also can finish one through A device shutdown VBUS power supply and dodge session to save power consumption, this is very important in the powered battery product.For example, when two cell phones were intercoursed information through connection, a mini-A end that is connected the electricity charge was an A equipment, is defaulted as main frame.Another is a B equipment, is defaulted as peripheral hardware.When not needing usb communication, A equipment can be closed the VBUS line, and B equipment will detect this state and get into merit low consumption pattern this moment.

But if A equipment only can serve as main frame, B equipment only can serve as peripheral hardware, and the mini-A plug connects A equipment, and the mini-B plug connects B equipment.If the ID pin ground connection in the mini-A plug, the ID pin in the mini-B plug is floating empty, and A equipment and B equipment could operate as normal.And if the ID pin in the mini-A plug is floating empty, the ID pin ground connection in the mini-B plug, A equipment and B equipment cisco unity malfunction; Need the user to plug repeatedly, that is, the mini-A plug is connected B equipment; The mini-B plug connects A equipment, just can make A equipment and B equipment operate as normal.

[summary of the invention]

The cable that main purpose of the present invention is to provide a kind of person of avoiding the use of when connecting, to plug repeatedly.

The present invention provides a kind of cable, and it comprises first plug, second plug and switch module, and said first plug comprises a VBUS pin, a D+ pin, a D-pin, a GND pin, an ID pin; Said second plug comprises the 2nd VBUS pin, the 2nd D+ pin, the 2nd D-pin, the 2nd GND pin, the 2nd ID pin; Wherein, the 2nd VBUS pin, the 2nd D+ pin, the 2nd D-pin, the 2nd GND pin are connected with a VBUS pin, a D+ pin, a D-pin, a GND pin respectively; Said switch module comprises earth terminal and movable end, said earth terminal ground connection, and said movable end optionally contacts an ID pin or the 2nd ID pin.

Especially, said switch module is a hand switch.

Especially, said first plug is the mini-A plug.

Especially, said second plug is the mini-A plug.

Especially, said first plug is the mini-B plug.

Especially, said second plug is the mini-B plug.

Compared with prior art; The present invention sets up switch module between first plug and second plug; Position through switch module switching activity end; And make movable end optionally contact an ID pin or the 2nd ID pin, so that an ID pin or the 2nd ID pin ground connection, the person of avoiding the use of plugs when connecting repeatedly.

[description of drawings]

Fig. 1 contacts the circuit diagram of an ID pin for movable end in the cable of the present invention.

Fig. 2 contacts the circuit diagram of the 2nd ID pin for movable end in the cable of the present invention.

[embodiment]

See also 1, shown in Figure 2; The present invention provides a kind of cable; Particularly a kind of USB OTG cable; It comprises first plug 10, second plug 20 and switch module 30, and said first plug 10 comprises a VBUS pin 11, a D+ pin 12, a D-pin 13, a GND pin 14, an ID pin 15; Said second plug 20 comprises the 2nd VBUS pin 21, the 2nd D+ pin 22, the 2nd D-pin 23, the 2nd GND pin 24, the 2nd ID pin 25; Wherein, the 2nd VBUS pin 21, the 2nd D+ pin 22, the 2nd D-pin 23, the 2nd GND pin 24 are connected with a VBUS pin 11, a D+ pin 12, a D-pin 13, a GND pin 14 respectively; Said switch module 30 comprises earth terminal 31 and movable end 32, said earth terminal 31 ground connection, and said movable end 32 optionally contacts an ID pin 15 or the 2nd ID pin 25.In present embodiment, said switch module 30 is a hand switch.Said first plug 10 is mini-A plug or mini-B plug.Said second plug 20 is mini-A plug or mini-B plug.

The present invention sets up switch module 30 between first plug 10 and second plug 20; Position through switch module 30 switching activity ends 32; And make movable end 32 optionally contact an ID pin 15 or the 2nd ID pin 25; So that an ID pin 15 or the 2nd ID pin 25 ground connection, the person of avoiding the use of plugs when connecting repeatedly.

The above; Be merely embodiment of the present invention, but protection scope of the present invention is not limited thereto, any technical staff who is familiar with the present technique field is in the technical scope that the present invention discloses; Can expect easily changing or replacement, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claim.

Claims

1. cable is characterized in that comprising:

First plug, it comprises a VBUS pin, a D+ pin, a D-pin, a GND pin, an ID pin;

Second plug; It comprises the 2nd VBUS pin, the 2nd D+ pin, the 2nd D-pin, the 2nd GND pin, the 2nd ID pin; Wherein, the 2nd VBUS pin, the 2nd D+ pin, the 2nd D-pin, the 2nd GND pin are connected with a VBUS pin, a D+ pin, a D-pin, a GND pin respectively;

Switch module, it comprises earth terminal and movable end, said earth terminal ground connection, and said movable end optionally contacts an ID pin or the 2nd ID pin.

2. cable according to claim 1 is characterized in that: said switch module is a hand switch.

3. cable according to claim 1 is characterized in that: said first plug is the mini-A plug.

4. cable according to claim 1 is characterized in that: said second plug is the mini-A plug.

5. cable according to claim 1 is characterized in that: said first plug is the mini-B plug.

6. cable according to claim 1 is characterized in that: said second plug is the mini-B plug.