CN201523224U - Lap joint circuit, signal terminal and electronic equipment provided with signal terminal - Google Patents
Lap joint circuit, signal terminal and electronic equipment provided with signal terminal Download PDFInfo
- Publication number
- CN201523224U CN201523224U CN2009200437056U CN200920043705U CN201523224U CN 201523224 U CN201523224 U CN 201523224U CN 2009200437056 U CN2009200437056 U CN 2009200437056U CN 200920043705 U CN200920043705 U CN 200920043705U CN 201523224 U CN201523224 U CN 201523224U
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- metal shell
- electronic equipment
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- signal terminal
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Abstract
The utility model relates to a lap joint circuit used for connecting signal terminals of two electronic devices. The lap joint circuit comprises a current-limiting lap joint part and a common-grounded lap joint part, wherein the current-limiting lap joint part is connected with one of the two electronic devices on the ground and is in lap joint with the other electronic device on the ground after being connected in series with a resistor; the common-grounded lap joint part is in common-grounded lap joint with the signal terminals of the two electronic devices after being in lap joint with the current-limiting lap joint part. The utility model also discloses a signal terminal of electronic equipment and the electronic equipment provided with the signal terminal, wherein the signal terminal is used to realize the lap joint of the circuit.
Description
Technical field
The utility model relates to a kind of strap circuits, more specifically, relates to the strap circuits of two electronic equipment signal terminals of a kind of connection, realizes the signal terminal of this strap circuits, and the electronic equipment of using this strap circuits.
Background technology
When two electronic equipments being carried out signal when connecting, when for example the signal input terminal of the signal output terminal of DVD player or set-top box and television set being overlapped by signal connecting line, a process altogether will be arranged.If two equipment insert civil power with the power line that three ends contain ground, because two equipment have ground wire to connect, the impedance between the two places mainly is the impedance of ground wire, and this impedance is very little.In this case, when two equipment carry out signal when connecting, with the waveform of oscilloscope measurement device interior IC chip input pin, will can not see having the shock pulse group to occur in process altogether, the machine intimate device does not have damage in this case.
Yet, the ordinary consumption class of electronic devices of selling on the present market at home, for example television set, DVD player, set-top box, electronic instrument etc., generally all adopt the two ends socket that the L/N alternating current is inserted machine and be rectified into direct current, give power electronic equipment, three end sockets of no use are introduced the ground wire in the civil power.In two electronic equipments (as DVD player and television set) one when using the two ends power line or all using the two ends power line, because not altogether, very big voltage difference is arranged between the ground wire of two electronic equipments.When the consumer carries out the signal connection with two equipment, in the middle of process altogether, owing to the electromotive force between two equipment ground wires does not wait, in connection procedure, in ground wire and signal, form the loop, because the cause that sparks can cause the sparking pulse, cause the device (mainly being the IC chip) of device interior to lose efficacy when two places join simultaneously because of this voltage/current impact failure.As shown in Figure 1, because the GND2 of the GND1 of equipment 1 and equipment 2 is not altogether, there is voltage difference between the two places.When overlapping the signal terminal of two equipment by signal connecting line L1, the loop between ground and signal produces electric current I, and device interior device (as the IC chip) is formed bigger impact, forms device failure.
In the prior art, all be on the anti-ESD circuit of electronic equipment, to improve.But this improvement can't corresponding above-mentioned ground connection be impacted, and electric current is big and the duration is longer because this surge voltage is not high.Therefore, need the strap circuits between a kind of improved electronic equipment, make electronic equipment when being connected to each other, eliminate because the not above-mentioned impact that causes of the electrical potential difference on ground altogether, thereby prevent that its internal components such as IC chip to equipment from causing damage, thoroughly solves the problem of Device element because of impact failure.
Summary of the invention
The purpose of this utility model provides a kind of strap circuits that is used to connect two electronic equipment signal terminals, when connecting the signal terminal of electronic equipment by this strap circuits, can eliminate by between the electronic equipment not altogether the voltage/current that causes of the electrical potential difference on ground impact, prevent from the electronic equipment internal device is caused damage.
For addressing the above problem, the utility model by the following technical solutions:
Described strap circuits comprises current limliting overlap and overlap altogether, and described current limliting overlap connects the wherein ground of an electronic equipment, and is connected in series the ground of another electronic equipment of overlap joint behind the resistance; Described overlap altogether overlaps the signal terminal of described two electronic equipments altogether after current limliting overlap overlap joint is finished.
Described strap circuits can be eliminated between the electronic equipment the principle that voltage/current that earth potential difference altogether causes impacts and be: this strap circuits makes connecting of two electronic equipment signal terminals will successively pass through following two processes commonly: 1. the equipotential current limliting does not overlap, promptly seal in enough big resistance in the overlap joint process, though therefore have very big voltage difference between the ground of two equipment in current overlap joint process, the impedance of this resistance can be played the effect of good containment surge voltage and impulse current.2. equipotential overlaps altogether, makes the ground of two electronic equipments reach equipotential by overlapping of signal terminal commonly, because the overlap joint of previous step, the voltage amplitude between two places is very low, can not produce surge voltage and impulse current.
Described strap circuits may further include the signal overlap, the signal terminal of two electronic equipments is carried out signal connect.
Described strap circuits can be applied to the connection between the various electronic equipment signal terminals, for example can be used for overlapping the input/output signal terminal of television set and external audio ﹠ video equipment such as DVD player, set-top box.
Can by on electronic equipment, be provided with one independently the shock resistance terminal realize above-mentioned strap circuits.In this case, the described current limliting overlap of strap circuits comprises a shock resistance terminal, and described shock resistance terminal is connected to the ground of this electronic equipment through a resistance, and described shock resistance terminal snaps into the ground of another electronic equipment by connecting line; Described overlap altogether overlaps the signal terminal of two electronic equipments altogether after shock resistance terminal overlap joint is finished.
Can also realize above-mentioned strap circuits by transforming the existing input/output signal terminal of electronic equipment.In this case, the signal terminal of electronic equipment comprises first metal shell, the impedance band that is positioned at the outside and is positioned at the second inboard metal shell.Described impedance band has certain resistance value, described first metal shell of separation signals terminal and described second metal shell; One second metal shell lead-in wire is set on described second metal shell, and described second metal shell lead-in wire connects the ground of electronic equipment internal.Described first metal shell, impedance band and second metal shell are formed the current limliting overlap of this signal terminal, when signal connecting line contacts with described first metal shell, snap into the ground of an external connected electronic equipment by signal connecting line; Described second metal shell also constitutes common ground overlap, is inserted into when contacting with second metal-back at signal connecting line, and the signal terminal by described signal connecting line and described external connected electronic equipment overlaps altogether.Signal terminal of the present utility model further comprises the signal transmit leg, electronic equipment and external connected electronic equipment is carried out signal be connected.
It is as follows that the another kind of the existing input/output signal terminal of electronic equipment improves structure: the signal terminal of electronic equipment comprises first metal shell, the insulating tape that is positioned at the outside and is positioned at the second inboard metal shell.Described first metal shell of described insulating tape separation signals terminal and described second metal shell; First metal shell lead-in wire is set on described first metal shell, and described first metal shell lead-in wire is through connecting the ground of electronic equipment internal behind the resistance; Second metal shell lead-in wire is set on described second metal shell, and described second metal shell lead-in wire directly connects the ground of electronic equipment internal; Described first metal shell, insulating tape and second metal shell are formed the current limliting overlap of this signal terminal, when signal connecting line contacts with described first metal shell, snap into the ground of an external connected electronic equipment by described signal connecting line; Described second metal shell also constitutes common ground overlap, is inserted into when contacting with second metal-back at described signal connecting line, and the signal terminal by described signal connecting line and described external connected electronic equipment overlaps altogether.Signal terminal of the present utility model further comprises the signal transmit leg, electronic equipment and external connected electronic equipment is carried out signal be connected.
The utility model also provides the electronic equipment with above-mentioned improved signal terminal, as television set, DVD player, set-top box etc.
When the strap circuits that provides by the utility model connects the signal terminal of two electronic equipments, voltage/current can not occur and impact, protect the internal circuit of electronic equipment.
Description of drawings
Below in conjunction with drawings and Examples the utility model is further described, in the accompanying drawing:
Fig. 1 is the schematic diagram of strap circuits of the prior art;
Fig. 2 is the schematic diagram of first preferred embodiment of strap circuits of the present utility model;
Fig. 3 is the schematic diagram of second preferred embodiment of strap circuits of the present utility model;
Fig. 4 is the schematic diagram of the 3rd preferred embodiment of strap circuits of the present utility model;
Fig. 5 is the schematic diagram of the 4th preferred embodiment of strap circuits of the present utility model.
Embodiment
In order to make those skilled in the art person understand the utility model scheme better, and above-mentioned purpose of the present utility model, feature and advantage can be become apparent more, the utility model is described in further detail below in conjunction with embodiment and embodiment accompanying drawing.
First preferred embodiment
Fig. 2 is the schematic diagram of first preferred embodiment of strap circuits of the present utility model.Strap circuits L2 of the present utility model is used to overlap the signal terminal of electronic equipment 1 and equipment 2.Shown in the frame of broken lines among Fig. 2, this strap circuits L2 comprises current limliting overlap L21 and overlap L22 altogether.The ground of current limliting overlap L21 connection device 2, and on the ground that is connected in series certain impedance R (as 4.7K ohm) back gap-bridging device 1; In above-mentioned overlap joint process, though there is very big voltage difference between the ground of two equipment, but because the impedance of 4.7K ohm is arranged in this overlap joint process, can play the effect that good containment is impacted, limited the size of the electric current I that produces in this process, therefore can not produce the impulse train of harassing and wrecking at the signal input part of the inside of equipment 2 IC chip; After above-mentioned overlap joint was finished, the voltage difference between the GND2 of the GND1 of equipment 1 and equipment 2 had become very little.The common ground overlap L22 of strap circuits L2 signal terminal of gap-bridging device 1 and equipment 2 altogether after current limliting overlap L21 overlap joint is finished, because under the effect of current limliting overlap L21, ground voltage has been lowered to certain degree between equipment 1 and equipment 2 two places, occur so in the process that overlaps altogether, do not have surge voltage/electric current, also just avoided voltage/current to impact and the destruction of harassing and wrecking of striking sparks equipment 2 internal circuit configurations.
Described strap circuits L2 further comprises signal overlap L23, when overlap L22 overlaps altogether altogether the signal terminal of equipment 1 and equipment 2 is carried out signal and is connected.
Described strap circuits L2 can be applied to various electronic equipments, for example as the connecting circuit between the signal terminal of television set and other audio ﹠ video equipments such as set-top box, DVD etc.
Second preferred embodiment
Fig. 3 is the schematic diagram of second preferred embodiment of strap circuits of the present utility model.In second preferred embodiment, strap circuits of the present utility model is applied to television set.As shown in Figure 3, described strap circuits L3 comprises current limliting overlap L31 and overlap L32 altogether.An independently shock resistance terminals P 31 is set on TV set panel, described current limliting overlap L31 comprises shock resistance terminals P 31, and the resistance R of 4.7K ohm that is connected with this shock resistance terminals P 31, and this resistance R is connected to the ground GND1 of television set complete machine.When equipment 2 as outsides such as DVD player, set-top box is connected, current limliting overlap L31 at first carries out the current limliting overlap joint, promptly before the overlap joint signal connecting line, adopt earlier the coring connecting line that described shock resistance terminals P 31 is snapped into the ground GND2 of equipment 2, form the current limliting overlap joint so that contain surge voltage and impulse current.For example shown in Fig. 3, the shock resistance terminals P 31 that similarly special terminal and television set can be set on equipment 2 overlaps.Then, overlap L32 carries out overlapping commonly altogether, can realize altogether between television set and equipment 2 with the common signal connecting line overlap joint television set and the signal terminal of equipment 2.Described strap circuits L3 also comprises signal overlap L33, and when overlapping the signal terminal of television set and equipment 2 with signal connecting line above-mentioned, described signal overlap L33 realizes that between television set and equipment 2 signal connects.
In the present embodiment, television set and being connected of external equipment are divided into two stages.At first utilize the shock resistance terminal and the external equipment of television set to carry out not iso-electric overlap joint.After not iso-electric overlap joint, the signal terminal by television set and external equipment carries out the equipotential overlap joint again, carries out signal simultaneously and connects.
Though it should be noted that in the present embodiment with television set to be that example describes, above-mentioned strap circuits structure can be applicable to other various electronic equipments, as computer system or game machine etc.
The 3rd preferred embodiment
Different with top embodiment, in the 3rd preferred embodiment of the present utility model, need not on equipment, to be provided with specially the shock resistance terminal, only by existing input/output signal terminal is transformed, in terminal, add the impedance of 4.7K ohm, realize connecting of protecting against shock commonly.
Fig. 4 is the schematic diagram of the 3rd preferred embodiment of strap circuits of the present utility model.This strap circuits mainly is to improve realization by the signal terminal to equipment.Described signal terminal comprises the first metal shell L41, the impedance band R that is positioned at the outside and is positioned at the second inboard metal shell L42.Described impedance band R can select the 4.7k ohmage for use, and the described first metal shell L41 and the described second metal shell L42 of signal terminal are separated by described impedance band R.One second metal shell lead-in wire L43 is set on the second metal shell L42, and described second metal shell lead-in wire L43 connects the ground of this device interior.The described first metal shell L41, impedance band R and the second metal shell L42 form the current limliting overlap of this signal terminal.When the signal connecting line of external equipment inserts signal terminal of the present invention, can meet the first metal shell L41 naturally earlier, the at this moment described first metal shell L41 snaps into the ground of external connected electronic equipment by signal connecting line.Because the impedance band R of 4.7K ohm exists, at this moment will discharge to the second metal shell L42 by this impedance band R, just by 4.7K ohm ground connection, thereby form not iso-electric current limliting overlap joint by the current limliting overlap.The second metal shell L42 of signal terminal also constitutes the common ground overlap of signal terminal, when the signal connecting line of external equipment inserts when putting in place fully, can touch the described second metal shell L42 naturally and be connected to the ground of equipment by described second metal shell lead-in wire L43, such second metal shell L42 overlaps altogether by the signal terminal of described signal connecting line and another electronic equipment, thereby external equipment and this equipment are realized altogether, finished the equipotential overlap joint.Described signal terminal further comprises signal transmit leg L44, and external equipment and this equipment are realized that signal is connected.
The 4th preferred embodiment
Fig. 5 is the schematic diagram of the 4th preferred embodiment of strap circuits of the present utility model.This strap circuits is still by signal terminal to equipment and improves realization.Described signal terminal comprises the first metal shell L51, the insulating tape I that is positioned at the outside and is positioned at the second inboard metal shell L52.Described insulating tape I has infinite-impedance, and the described first metal shell L51 and the described second metal shell L52 of signal terminal are separated by described insulating tape I.First metal shell lead-in wire L53 is set on the described first metal shell L51, is connected with the ground of device interior after making this lead-in wire L53 through the resistance of a 4.7K ohm.One second metal shell lead-in wire L54 is set on the second metal shell L52, and described second metal shell lead-in wire L54 directly connects the ground of this device interior.The described first metal shell L51, insulating tape I and the second metal shell L52 form the current limliting overlap of this signal terminal.When signal connecting line inserts, can meet the first metal shell L51 naturally earlier, the at this moment described first metal shell L51 snaps into the ground of external connected electronic equipment by signal connecting line; Because the first metal shell L51 is connected with the ground of device interior behind the resistance of 4.7K ohm by described first metal shell lead-in wire L53, can form by the first metal shell L51 through 4.7K Ohmic resistance not equipotential current limliting overlap joint over the ground.The described second metal shell L52 constitutes the common ground overlap of signal terminal simultaneously, when signal connecting line inserts when putting in place fully, can touch the ground of described second metal shell lead-in wire of the second metal shell L52 and process L54 connection device inside naturally, thereby by overlap altogether external equipment and this equipment are realized altogether, finished the equipotential overlap joint.Described signal terminal further comprises signal transmit leg L55, and external equipment and this equipment are realized that signal is connected.
By third and fourth preferred embodiment of the present utility model; can be when signal connecting line inserts; without artificial any intervention; naturally successively overlap altogether through above-mentioned not equipotential current limliting overlap joint and equipotential; thereby eliminate because the not impact that causes of the electrical potential difference on ground altogether between the equipment, protection device interior circuit performance is unaffected.
The above only is an embodiment of the present utility model, and the utility model can also be applied in other electronic equipment, as computer system, games system, cell phone system, electronic instrument etc.Protection range of the present utility model is not limited thereto, and anyly is familiar with those skilled in the art in the technical scope that the utility model discloses, and the variation that can expect easily or replacement all should be encompassed within the protection range of the present utility model.Therefore, protection range of the present utility model should be as the criterion with the protection range that claim was defined.
Claims (10)
1. strap circuits that is used to connect the signal terminal of two electronic equipments is characterized in that comprising:
The current limliting overlap connects the wherein ground of an electronic equipment, and is connected in series the ground of another electronic equipment of overlap joint behind the resistance;
Overlap altogether overlaps the signal terminal of described two electronic equipments altogether after current limliting overlap overlap joint is finished.
2. strap circuits according to claim 1 is characterized in that: described strap circuits further comprises the signal overlap, the signal terminal of described two electronic equipments is carried out signal connect.
3. strap circuits according to claim 1, it is characterized in that: described current limliting overlap is included in a shock resistance terminal independently that is provided with on the electronic equipment, described shock resistance terminal is connected to the ground of this electronic equipment through described resistance, and snaps into the ground of another electronic equipment by connecting line; Described overlap altogether overlaps the signal terminal of described two electronic equipments altogether after shock resistance terminal overlap joint is finished.
4. according to each described strap circuits in the claim 1 to 3, it is characterized in that: described strap circuits is used to overlap the input/output signal terminal of television set and DVD player or set-top box.
5. the signal terminal of an electronic equipment is characterized in that comprising: be positioned at first metal shell, the impedance band in the outside and be positioned at the second inboard metal shell;
Described impedance band has certain resistance value, described first metal shell of separation signals terminal and described second metal shell;
One second metal shell lead-in wire is set on described second metal shell, and described second metal shell lead-in wire connects the ground of electronic equipment internal;
Described first metal shell, impedance band and second metal shell are formed the current limliting overlap of described signal terminal, when signal connecting line contacts with described first metal shell, snap into the ground of an external connected electronic equipment by described signal connecting line;
Described second metal shell also constitutes common ground overlap, is inserted into when contacting with second metal-back at described signal connecting line, and the signal terminal by described signal connecting line and described external connected electronic equipment overlaps altogether.
6. signal terminal according to claim 5 is characterized in that: described signal terminal further comprises the signal transmit leg, described electronic equipment and external connected electronic equipment is carried out signal be connected.
7. the signal terminal of an electronic equipment is characterized in that comprising: be positioned at first metal shell, the insulating tape in the outside and be positioned at the second inboard metal shell;
Described first metal shell of described insulating tape separation signals terminal and described second metal shell;
First metal shell lead-in wire is set on described first metal shell, and described first metal shell lead-in wire is through connecting the ground of described electronic equipment internal behind the resistance;
Second metal shell lead-in wire is set on described second metal shell, and described second metal shell lead-in wire directly connects the ground of described electronic equipment internal;
Described first metal shell, insulating tape and second metal shell are formed the current limliting overlap of this signal terminal, when signal connecting line contacts with described first metal shell, snap into the ground of an external connected electronic equipment by described signal connecting line;
Described second metal shell also constitutes common ground overlap, is inserted into when contacting with second metal-back at described signal connecting line, and the signal terminal by described signal connecting line and described external connected electronic equipment overlaps altogether.
8. signal terminal according to claim 7 is characterized in that: described signal terminal further comprises the signal transmit leg, described electronic equipment and external connected electronic equipment is carried out signal be connected.
9. an electronic equipment is characterized in that having each described signal terminal in the claim 5 to 8.
10. electronic equipment according to claim 9 is characterized in that described electronic equipment is any in television set, DVD player, the set-top box.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200437056U CN201523224U (en) | 2009-05-27 | 2009-05-27 | Lap joint circuit, signal terminal and electronic equipment provided with signal terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200437056U CN201523224U (en) | 2009-05-27 | 2009-05-27 | Lap joint circuit, signal terminal and electronic equipment provided with signal terminal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201523224U true CN201523224U (en) | 2010-07-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009200437056U Expired - Fee Related CN201523224U (en) | 2009-05-27 | 2009-05-27 | Lap joint circuit, signal terminal and electronic equipment provided with signal terminal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201523224U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101645541B (en) * | 2009-05-27 | 2011-12-07 | 青岛海信电器股份有限公司 | Lapped circuit and lapping method thereof |
| CN103345374A (en) * | 2013-07-09 | 2013-10-09 | 京东方科技集团股份有限公司 | Multi-screen display device and method for eliminating multi-screen signal interference |
| CN109592550A (en) * | 2019-01-24 | 2019-04-09 | 通力电梯有限公司 | Control cabinet and escalator including it |
-
2009
- 2009-05-27 CN CN2009200437056U patent/CN201523224U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101645541B (en) * | 2009-05-27 | 2011-12-07 | 青岛海信电器股份有限公司 | Lapped circuit and lapping method thereof |
| CN103345374A (en) * | 2013-07-09 | 2013-10-09 | 京东方科技集团股份有限公司 | Multi-screen display device and method for eliminating multi-screen signal interference |
| US9541950B2 (en) | 2013-07-09 | 2017-01-10 | Boe Technology Group Co., Ltd. | Multi-screen display apparatus and method for eliminating signal interferences in multi-screens |
| CN109592550A (en) * | 2019-01-24 | 2019-04-09 | 通力电梯有限公司 | Control cabinet and escalator including it |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100707 Termination date: 20130527 |