CN103107437A - On-board diagnostics (OBD) connecting port protection structure - Google Patents
On-board diagnostics (OBD) connecting port protection structure Download PDFInfo
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- CN103107437A CN103107437A CN2013100193527A CN201310019352A CN103107437A CN 103107437 A CN103107437 A CN 103107437A CN 2013100193527 A CN2013100193527 A CN 2013100193527A CN 201310019352 A CN201310019352 A CN 201310019352A CN 103107437 A CN103107437 A CN 103107437A
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- lead foot
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Abstract
The invention provides an on-board diagnostics (OBD) connecting port protection structure. A connecting port comprises 16 lead feet, the lead foot 16 is a power supply connection end, the lead foot 4 and lead foot 5 are ground ends, the length of the contact pins of the lead foot 4 and the lead foot 5 is bigger than that of the lead foot 16, and the length of the contact pin of the sixteenth contact pin is bigger than that of other lead feet. According to the OBD connecting port protection structure, the length of the contact pins of the lead foot 4 and the lead foot 5 is arranged to be biggest, the length of the contact pin of the lead foot 16 takes a second place, the length of the contact pins of other lead feet is smallest, and therefore the system is powered on firstly. Therefore, an interface circuit or an electronic control unit (ECU) circuit is burned down due to transient short circuit of a switch after being powered on, the service life of automobile diagnostic equipment is prolonged, and meanwhile an automobile is protected from being damaged secondarily by a maintenance man when the automobile is maintained.
Description
Technical field
The present invention relates to the vehicle diagnosis technical field, relate in particular to a kind of vehicle diagnosis interface (OBD) protection structure.
Background technology
Automobile is the most familiar, the modal vehicles of people, and it is bringing into play very important effect in people's life.Along with the development of society and the progress of science and technology, the design and production of automobile also more and more adopts electronic technology, automatic technology and electronic computer technology, this makes the automaticity of automobile more and more higher on the one hand, and performance is more superior, and is more convenient to operate flexible.
Existing fault detection system for automobile is connected ECU (Electrical Control Unit) with automotive interior ECU by the diagnose interface circuit) communicate connection, as shown in Figure 1.In the process of power supply electrifying, power supply and each element circuit are in the transient state situation, and the on off state that is used for gating vehicle diagnosis interface switch circuit unit is uncertain, and instantaneous short circuit can appear in switch, can burn interface circuit under certain condition, or burns the ECU circuit.
Summary of the invention
The object of the present invention is to provide a kind of OBD interface protection structure, burn interface circuit or ECU circuit to avoid the short circuit of upper electric transient switch.
The objective of the invention is to be achieved through the following technical solutions.
A kind of OBD interface protection structure; this interface comprises 16 pins, and wherein 16 pins are power access end, and 4,5 pins are earth terminal; 4th, the contact pin length of 5 pins is greater than the contact pin length of 16 pins, and the contact pin length of the 16th pin is greater than all the other pin contact pin length.
Further preferably, described the 4th, 5 pin contact pin length are 8.8～9.2mm.
Further preferably, described the 16th pin contact pin length is 8.0～8.3mm.
Further preferably, described the 1st, 2,3,6,7,8,9,10,11,12,13,14 and 15 pin contact pin length are 7.4～7.6mm.
The present invention compared with prior art, beneficial effect is: OBD interface protection structure provided by the invention, be made as the longlyest by the contact pin length with the 4th, 5 pins in this interface, and the contact pin length of the 16th pin is taken second place, all the other pin contact pin length are the shortest, and system first powers on assurance; Thereby prevent the short circuit of electric transient switch and burn interface circuit or ECU circuit, having improved the useful life of automotive diagnostic installation, also avoiding the maintenance man to occur the automobile secondary is damaged when auto repair simultaneously.
Description of drawings
Fig. 1 is vehicle diagnosis interface principle block diagram.
Fig. 2 is vehicle diagnosis interface pin schematic diagram.
Fig. 3 is vehicle diagnosis interface internal structure schematic diagram.
Embodiment
In order to make purpose of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, is not intended to limit the present invention.
See also shown in Figure 2ly, the OBD interface is used for providing being connected of the equipment such as automobile and diagnosis, and this interface has 16 pins, and wherein 16 pins are power access end, 4,5 pin ground connection.
In one embodiment of the invention, 7 pin pin are the K line, and 15 pins are the L line, and 2,10 pins are as the J1850 interface, and 6,14 pins are as the CAN communication interface.
In Fig. 3, the contact pin length of 4,5 pins is greater than the contact pin length of 16 pins;
The contact pin length of 16 pins is greater than 1,2,3,6,7,8,9,10,11,12,13,14,15 pin contact pin length.
In one embodiment of the invention, 4,5 pin contact pin length are 8.8～9.2mm.
In one embodiment of the invention, 16 pin contact pin length are 8.0～8.3mm.
In one embodiment of the invention, all the other pin contact pin length are 7.4～7.6mm.
Realize principle:
When onboard diagnostic device inserts the OBD interface, first contact conducting with 4,5 pins, onboard diagnostic device and automobile guarantee both balances of voltage first altogether.
Due to 16 pin vice-minister, 16 pin Contacts when onboard diagnostic device and automobile OBD interface have Fig. 1 as can be known, this moment circuit turn-on, automobile is powered to onboard diagnostic device, onboard diagnostic device is started working, interface circuit is carried out initialization.Make interface circuit be initialized as safe condition, avoid that on interface circuit, the electric transient switch is short-circuited to ground, avoid burning interface circuit or automobile ECU circuit.
OBD interface protection structure provided by the invention is made as the longlyest by the contact pin length with the 4th, 5 pins in this interface, the contact pin length of the 16th pin is taken second place, and all the other pin contact pin length are the shortest, and system first powers on assurance; Thereby prevent the short circuit of electric transient switch and burn interface circuit or ECU circuit, having improved the useful life of automotive diagnostic installation, also avoiding the maintenance man to occur the automobile secondary is damaged when auto repair simultaneously.
The above is only preferred embodiment of the present invention, not in order to limiting the present invention, all any modifications of doing within the spirit and principles in the present invention, is equal to and replaces and improvement etc., within all should being included in protection scope of the present invention.
Claims (4)
1. OBD interface protection structure, this interface comprises 16 pins, wherein 16 pins are power access end; 4,5 pins are earth terminal; it is characterized in that, the contact pin length of the 4th, 5 pins is greater than the contact pin length of 16 pins, and the contact pin length of the 16th pin is greater than all the other pin contact pin length.
2. OBD interface protection structure as claimed in claim 1, is characterized in that, described the 4th, 5 pin contact pin length are 8.8～9.2mm.
3. OBD interface protection structure as claimed in claim 1, is characterized in that, described the 16th pin contact pin length is 8.0～8.3mm.
4. OBD interface protection structure as claimed in claim 1, is characterized in that, described the 1st, 2,3,6,7,8,9,10,11,12,13,14 and 15 pin contact pin length are 7.4～7.6mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013100193527A CN103107437A (en) | 2013-01-17 | 2013-01-17 | On-board diagnostics (OBD) connecting port protection structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013100193527A CN103107437A (en) | 2013-01-17 | 2013-01-17 | On-board diagnostics (OBD) connecting port protection structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103107437A true CN103107437A (en) | 2013-05-15 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013100193527A Pending CN103107437A (en) | 2013-01-17 | 2013-01-17 | On-board diagnostics (OBD) connecting port protection structure |
Country Status (1)
| Country | Link |
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| CN (1) | CN103107437A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105337066A (en) * | 2014-08-06 | 2016-02-17 | 富士康(昆山)电脑接插件有限公司 | Cable connector assembly |
| CN106207557A (en) * | 2016-07-18 | 2016-12-07 | 青岛海信电器股份有限公司 | A kind of female seat, male seat, main frame and expansion equipment |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2238489Y (en) * | 1995-10-13 | 1996-10-23 | 洛阳航空电器有限公司 | Electric connector |
| US5582519A (en) * | 1994-12-15 | 1996-12-10 | The Whitaker Corporation | Make-first-break-last ground connections |
| US6945824B1 (en) * | 2004-08-24 | 2005-09-20 | Cheng Uei Precision Industry Co., Ltd. | Connector assembly |
| CN101079522A (en) * | 2006-05-24 | 2007-11-28 | 宏达国际电子股份有限公司 | Connector |
| CN201118054Y (en) * | 2007-11-12 | 2008-09-17 | 深圳市通茂电子有限公司 | Rectangular connector for power-supply |
| CN202121113U (en) * | 2011-05-18 | 2012-01-18 | 美国莫列斯股份有限公司 | Electrical connector |
-
2013
- 2013-01-17 CN CN2013100193527A patent/CN103107437A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5582519A (en) * | 1994-12-15 | 1996-12-10 | The Whitaker Corporation | Make-first-break-last ground connections |
| CN2238489Y (en) * | 1995-10-13 | 1996-10-23 | 洛阳航空电器有限公司 | Electric connector |
| US6945824B1 (en) * | 2004-08-24 | 2005-09-20 | Cheng Uei Precision Industry Co., Ltd. | Connector assembly |
| CN101079522A (en) * | 2006-05-24 | 2007-11-28 | 宏达国际电子股份有限公司 | Connector |
| CN201118054Y (en) * | 2007-11-12 | 2008-09-17 | 深圳市通茂电子有限公司 | Rectangular connector for power-supply |
| CN202121113U (en) * | 2011-05-18 | 2012-01-18 | 美国莫列斯股份有限公司 | Electrical connector |
Non-Patent Citations (1)
| Title |
|---|
| 钟勇，李敏旭: "OBD技术的现状与未来", 《福州工程学院学报》, vol. 7, no. 1, 28 February 2009 (2009-02-28) * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105337066A (en) * | 2014-08-06 | 2016-02-17 | 富士康(昆山)电脑接插件有限公司 | Cable connector assembly |
| CN106207557A (en) * | 2016-07-18 | 2016-12-07 | 青岛海信电器股份有限公司 | A kind of female seat, male seat, main frame and expansion equipment |
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| PB01 | Publication | ||
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| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20130515 |