CN205051086U - Non-polar port circuit - Google Patents
Non-polar port circuit Download PDFInfo
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- CN205051086U CN205051086U CN201520805525.2U CN201520805525U CN205051086U CN 205051086 U CN205051086 U CN 205051086U CN 201520805525 U CN201520805525 U CN 201520805525U CN 205051086 U CN205051086 U CN 205051086U
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- 238000001514 detection method Methods 0.000 claims abstract description 13
- 230000000052 comparative effect Effects 0.000 claims description 5
- 238000002955 isolation Methods 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
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Abstract
Disclosed is a non-polar port circuit for connection with an external port including a positive terminal and a negative terminal, comprising: an internal port having a first terminal in electrical contact with one of the positive and negative terminals of the external port and a second terminal in electrical contact with the other of the positive and negative terminals of the external port when the non-polar port circuit is connected to the external port; an internal circuit module connected with the internal port via a first line and a second line; the double-path complementary single-pole double-throw switch is used for realizing automatic line switching according to a control signal; and a switch control module for generating a control signal according to detection signals of a first terminal and a second terminal of the internal port, wherein the first line is connected to a positive terminal of the external port, and the second line is connected to a negative terminal of the external port, so that the internal circuit module obtains a power supply voltage when the internal port is connected with the external port.
Description
Technical field
The utility model relates to power circuit, more specifically, relates to the nonpolarity port circuit for power circuit.
Background technology
The port of power circuit has the restriction of polarity usually, and namely both positive and negative polarity should with the termination contact of specifying.If both positive and negative polarity reversal connection, then power circuit cisco unity malfunction, even causes short circuit, causes power supply or load circuit to burn.Therefore, wish that the port of power circuit can prevent both positive and negative polarity reversal connection.
Fig. 1 illustrates the schematic block diagram of the power circuit according to prior art.As shown in the figure, outside port 110 is such as plug, and with the termination contact of internal port 120, internal port 120 is such as socket.Internal port 120 is connected with internal circuit blocks 130 further.Between internal port 120 and internal circuit blocks 130, forward connects diode D1.In this power circuit, comprise specific mechanical structure and additional diode D1 for preventing the method for both positive and negative polarity reversal connection.Form fit between outside port 110 and internal port 120, the concaveconvex shape such as corresponded to each other, makes will to be connected with specific direction.Diode D1 only allows forward conduction, the conducting when outside port one 10 and internal port 120 exact connect ion, disconnects when outside port one 10 and internal port 120 incorrect link.When both positive and negative polarity reversal connection, the electrical connection between diode D1 breaking inner port one 20 and internal circuit blocks 130.
But above-mentioned power circuit still also exists the situation of human operational error, cause both positive and negative polarity reversal connection.If switch external power source when both positive and negative polarity reversal connection, so internal circuit blocks can not work.The above-mentioned method of both positive and negative polarity reversal connection that prevents not only needs, for plugs and sockets certain moduli tool, to cause cost to raise, and owing to quitting work when both positive and negative polarity reversal connection, causes the experience of the articles for use such as household electrical appliance not good.Therefore, expecting to develop nonpolarity port circuit, making the connection between outside port and internal port without the need to distinguishing both positive and negative polarity.
Utility model content
The purpose of this utility model is to provide a kind of automatic circuit that utilizes to switch the nonpolarity port circuit realized, thus still can maintain the work of internal circuit when both positive and negative polarity reversal connection, and without the need to designing special mechanical structure to prevent both positive and negative polarity reversal connection.
According to the utility model, a kind of nonpolarity port circuit is provided, for being connected with the outside port comprising positive terminal and negative terminal, described nonpolarity port circuit comprises: internal port, comprise the first terminal and the second terminal, when nonpolarity port circuit is connected with outside port, the first terminal of internal port and one of positive terminal and the negative terminal electrical contact of outside port, the second terminal of internal port and the positive terminal of outside port and another electrical contact of negative terminal; Internal circuit blocks, is connected with internal port with the second circuit via first line; The complementary single-pole double-throw switch (SPDT) of two-way, switches for realizing automatic circuit according to control signal; And switch control module, for producing control signal according to the first terminal of internal port and the detection signal of the second terminal, wherein, described first line is connected to the positive terminal of outside port via internal port and the complementary single-pole double-throw switch (SPDT) of two-way, described second circuit is connected to the negative terminal of outside port via internal port and the complementary single-pole double-throw switch (SPDT) of two-way, makes internal circuit blocks obtain supply voltage when internal port is connected with outside port.
Preferably, switch control module produces the first control signal and the second control signal according to the comparative result of the detection signal of the first terminal and the second terminal, when receiving the first control signal, the first terminal of internal port and the second terminal are connected to first line and the second circuit by two-way complementary single-pole double-throw switch (SPDT) respectively, when receiving the second control signal, the second terminal of internal port and the first terminal are connected to first line and the second circuit by two-way complementary single-pole double-throw switch (SPDT) respectively.
Preferably, the complementary single-pole double-throw switch (SPDT) of two-way comprises first to fourth terminal, and when receiving the first control signal, first to be communicated with the 3rd terminal and second to be communicated with the 4th terminal, when receiving the second control signal, first to be communicated with the 4th terminal and second to be communicated with the 3rd terminal.
Preferably, when not receiving any one of the first control signal and the second control signal, the first terminal of internal port and first line and the second circuit disconnect by the complementary single-pole double-throw switch (SPDT) of two-way, and the second terminal of internal port and first line and the second circuit are disconnected.
Preferably, the complementary single-pole double-throw switch (SPDT) of two-way comprises the first control end and the second control end, and the first control signal and the second control signal comprise the two-way control signal for controlling the first control end and the second control end respectively.
Preferably, described switch control module comprises: the first switching value module, for obtaining the detection signal of the first terminal and the second terminal; Second switch amount module, for providing one of the first control signal and the second control signal; And polar signal acquisition module, for producing one of the first control signal and the second control signal according to the detection signal of the first terminal and the second terminal, wherein, the first switching value module and second switch amount module are used for the switching value isolation by polar signal acquisition module and primary current path.
Preferably, the first switching value module and second switch amount module comprise photoisolator or relay isolator respectively.
Preferably, polar signal acquisition module comprises: comparator, for comparing the detection signal of the first terminal and the second terminal; Signal generating circuit, for producing one of the first control signal and the second control signal according to comparative result.
Preferably, the detection signal of the first terminal and the second terminal is respectively the current potential of the first terminal and the second terminal.
According to the nonpolarity port circuit of embodiment of the present utility model, add simple signal Check up polarity and ON-OFF control circuit at internal electric source interface circuitry portions and reach correct and the function that turns off redirect access power positive cathode circuit neatly.By correct circuit inductance and polarity lines selection flexibly, impel the versatility realizing electronic circuit and structure mold, greatly reduce costs.
This is nonpolarity, and port circuit stops oppositely to make mistakes when external power source circuit accesses internal wiring phenomenon from root.The highly versatile of this port circuit, not by the restriction of interface die, can be applied to different product.Relative to traditional counnter attack technical scheme, power circuit anti-plug error rate can be reduced to almost nil, estimating can by row's seat mould die sinking cost savings half funds of product.
Accompanying drawing explanation
By referring to the description of accompanying drawing to the utility model embodiment, above-mentioned and other objects, features and advantages of the present utility model will be more clear, in the accompanying drawings:
Fig. 1 illustrates the schematic block diagram of the power circuit according to prior art.
Fig. 2 illustrates the schematic block diagram of the power circuit according to embodiment of the present utility model.
Fig. 3 illustrates the schematic circuit of the switch control module used in the power circuit according to embodiment of the present utility model.
Embodiment
In more detail the utility model is described hereinafter with reference to accompanying drawing.In various figures, identical element adopts similar Reference numeral to represent.For the sake of clarity, the various piece in accompanying drawing is not drawn in proportion.In addition, may some known part not shown.
In this application, term " the complementary single-pole double-throw switch (SPDT) of two-way " refers to the switch comprising two inputs and two outputs, for providing the connection of two circuits and can exchanging lead-out terminal between two circuits.
The utility model can present in a variety of manners, below will describe some of them example.
Fig. 2 illustrates the schematic block diagram of the power circuit according to embodiment of the present utility model.As shown in the figure, outside port 210 is such as plug, and internal port 220 is such as socket, when being connected to each other, is electrical contact with each other with the terminal of outside port 210 and the terminal of internal port 220.Internal port 220 is connected with internal circuit blocks 230 further.Between internal port 220 and internal circuit blocks 230, the complementary single-pole double-throw switch (SPDT) K1 of two-way is used for realizing automatic circuit and switches.Switch control module 240 and internal port 220 and the complementary single-pole double-throw switch (SPDT) K1 of two-way, thus obtain the terminal polarity of internal port 220, and switch the complementary single-pole double-throw switch (SPDT) K1 of two-way according to the terminal polarity of internal port 220.The complementary single-pole double-throw switch (SPDT) K1 of two-way comprises four terminals A, B, C, D, and according to the control signal of internal terminal 220, disconnects at two-way, between terminal AC and be communicated with between terminal BD, between terminal AD and be communicated with between terminal BC between three kinds of states and switch.
At work, such as, if outside port 210 is not connected with internal port 220, if when plug does not insert socket, the complementary single-pole double-throw switch (SPDT) K1 of two-way is in two-way off-state, makes the separated of internal port 220 and internal circuit blocks 230.
Such as, if outside port 210 is connected with internal port 220, if plug insertion socket, then switch control module 240 obtains the terminal polarity of internal port 220.If both positive and negative polarity just connects, the terminal A of the complementary single-pole double-throw switch (SPDT) K1 of two-way is connected to high potential, and terminal B is connected to electronegative potential.If both positive and negative polarity reversal connection, otherwise then.Terminal polarity when switch control module 240 can judge actual connection according to the terminal current potential of internal port 220.
When both positive and negative polarity just connects, switch control module 240 produces the first control signal, makes between the terminal AC of the complementary single-pole double-throw switch (SPDT) K1 of two-way and is communicated with between terminal BD.When both positive and negative polarity just connects, switch control module 240 produces the second control signal, makes between the terminal AD of the complementary single-pole double-throw switch (SPDT) K1 of two-way and is communicated with between terminal BC.
In this embodiment, between internal port and internal circuit blocks, add the complementary single-pole double-throw switch (SPDT) of two-way and corresponding switch control module.This switch control module is such as independent integrated circuit.After outside port inserts internal port, automatically carry out route choosing and internal port is connected with internal circuit blocks.Switch control module collects the match condition between two terminals of internal port automatically, and judges that both positive and negative polarity is just connecing or reversal connection according to the current potential of terminal, thus reaches the effect of accurately location positive and negative circuit correspondence connection.
Fig. 3 illustrates the schematic circuit of the switch control module used in the power circuit according to embodiment of the present utility model.Switch control module 240 comprises polar signal acquisition module 241, first switching value module 242 and second switch amount module 243.First switching value module 242 and second switch amount module 243 such as comprise photoisolator or relay isolator respectively, for isolating, the switching value of polar signal acquisition module 241 with primary current path to avoid switching value to the impact of control circuit and interference.Switching value such as comprises the on/off signal of switch, the switching etc. of such as, connection/disconnection between outside port 210 and internal port 220, the complementary single-pole double-throw switch (SPDT) K1 of two-way.
The power end of the first switching value module 242 is connected to power supply, and two inputs are connected to two terminals of internal port 220 respectively, and two outputs are connected to two inputs of polar signal acquisition module 241.First switching value module 242 also comprises the filter circuit be made up of resistance R3 and electric capacity C3, to obtain the supply voltage of smooth steady.
The power end of polar signal acquisition module 241 is connected to power supply, and two inputs are connected to two outputs of the first switching value module 242, and two outputs are connected to two inputs of second switch amount module 243.At two inputs of polar signal acquisition module 241, be connected in parallel electric capacity C1 and resistance R1 and electric capacity C2 and resistance R2 respectively.Electric capacity C1 and C2 is utilized to carry out filtering, to remove high-frequency interferencing signal to the two-way output signal of the first switching value module 242 respectively.Resistance R1 and R2 is utilized to carry out current limliting to the two-way output signal of the first switching value module 242 respectively.
The power end of second switch amount module 243 is connected to power supply, and two inputs are connected to two outputs of polar signal acquisition module 241 respectively, and two outputs are connected to the control end of the complementary single-pole double-throw switch (SPDT) K1 of two-way.Second switch amount module 243 also comprises the filter circuit be made up of resistance R4 and electric capacity C4, to obtain the supply voltage of smooth steady.
Such as, polar signal acquisition module 241 comprises comparator and signal generating circuit.At work, polar signal acquisition module 241 obtains the current potential of two terminals of internal port 220 via the first switching value module 242.The current potential of comparator to two terminals compares.Signal generating circuit produces two path control signal according to comparative result.Control signal is provided to the control end of the complementary single-pole double-throw switch (SPDT) K1 of two-way by polar signal acquisition module 241 via second switch amount module 242.
If outside port 210 is not connected with internal port 220, switch control module 240 does not correspondingly produce control signal, and the complementary single-pole double-throw switch (SPDT) K1 of two-way is in unactivated state, i.e. two-way off-state.If outside port 210 is connected with internal port 220, switch control module 240 correspondingly produces control signal, makes the complementary single-pole double-throw switch (SPDT) K1 of two-way be in state of activation.More specifically, if both positive and negative polarity just connects, then this control signal makes between the terminal AC of the complementary single-pole double-throw switch (SPDT) K1 of two-way and is communicated with between terminal BD, if both positive and negative polarity reversal connection, then this control signal makes between the terminal AD of the complementary single-pole double-throw switch (SPDT) K1 of two-way and is communicated with between terminal BC.
In this embodiment, switch control module is made up of polar signal acquisition module and two switching value modules.The switching value module of access external interface coordinates polar signal acquisition module be responsible for gathering the polar signal that senses and be transferred in acquisition module, acquisition module judges connection status and the instruction after judgement is issued to be connected into switching value module, thus accurately and neatly controls the positive and negative wire connection state of internal port and outside port.
In the above description, known structural element and step are not described in detail.But it will be appreciated by those skilled in the art that and by various technological means, corresponding structural element and step can be realized.In addition, in order to form identical structural element, those skilled in the art can also design the not identical method with method described above.In addition, although respectively describing each embodiment above, this is not also meaning that the measure in each embodiment can not advantageously be combined.
Above embodiment of the present utility model is described.But these embodiments are only used to the object illustrated, and are not intended to limit scope of the present utility model.Scope of the present utility model is by claims and equivalents thereof.Do not depart from scope of the present utility model, those skilled in the art can make multiple substituting and amendment, and these substitute and amendment all should drop within scope of the present utility model.
Claims (9)
1. a nonpolarity port circuit, is characterized in that, for being connected with the outside port comprising positive terminal and negative terminal, described nonpolarity port circuit comprises:
Internal port, comprise the first terminal and the second terminal, when nonpolarity port circuit is connected with outside port, the first terminal of internal port and one of positive terminal and the negative terminal electrical contact of outside port, the second terminal of internal port and the positive terminal of outside port and another electrical contact of negative terminal;
Internal circuit blocks, is connected with internal port with the second circuit via first line;
The complementary single-pole double-throw switch (SPDT) of two-way, switches for realizing automatic circuit according to control signal; And
Switch control module, for producing control signal according to the first terminal of internal port and the detection signal of the second terminal,
Wherein, described first line is connected to the positive terminal of outside port via internal port and the complementary single-pole double-throw switch (SPDT) of two-way, described second circuit is connected to the negative terminal of outside port via internal port and the complementary single-pole double-throw switch (SPDT) of two-way, makes internal circuit blocks obtain supply voltage when internal port is connected with outside port.
2. circuit according to claim 1, is characterized in that, switch control module produces the first control signal and the second control signal according to the comparative result of the detection signal of the first terminal and the second terminal,
When receiving the first control signal, the first terminal of internal port and the second terminal are connected to first line and the second circuit by two-way complementary single-pole double-throw switch (SPDT) respectively,
When receiving the second control signal, the second terminal of internal port and the first terminal are connected to first line and the second circuit by two-way complementary single-pole double-throw switch (SPDT) respectively.
3. circuit according to claim 2, it is characterized in that, the complementary single-pole double-throw switch (SPDT) of two-way comprises first to fourth terminal, when receiving the first control signal, first to be communicated with the 3rd terminal and second to be communicated with the 4th terminal, when receiving the second control signal, first to be communicated with the 4th terminal and second to be communicated with the 3rd terminal.
4. circuit according to claim 2, it is characterized in that, when not receiving any one of the first control signal and the second control signal, the first terminal of internal port and first line and the second circuit disconnect by the complementary single-pole double-throw switch (SPDT) of two-way, and the second terminal of internal port and first line and the second circuit are disconnected.
5. circuit according to claim 2, it is characterized in that, the complementary single-pole double-throw switch (SPDT) of two-way comprises the first control end and the second control end, and the first control signal and the second control signal comprise the two-way control signal for controlling the first control end and the second control end respectively.
6. circuit according to claim 2, is characterized in that, described switch control module comprises:
First switching value module, for obtaining the detection signal of the first terminal and the second terminal;
Second switch amount module, for providing one of the first control signal and the second control signal; And
Polar signal acquisition module, for producing one of the first control signal and the second control signal according to the detection signal of the first terminal and the second terminal,
Wherein, the first switching value module and second switch amount module are used for the switching value isolation by polar signal acquisition module and primary current path.
7. circuit according to claim 6, is characterized in that, the first switching value module and second switch amount module comprise photoisolator or relay isolator respectively.
8. circuit according to claim 6, is characterized in that, polar signal acquisition module comprises:
Comparator, for comparing the detection signal of the first terminal and the second terminal;
Signal generating circuit, for producing one of the first control signal and the second control signal according to comparative result.
9. circuit according to claim 8, is characterized in that, the detection signal of the first terminal and the second terminal is respectively the current potential of the first terminal and the second terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520805525.2U CN205051086U (en) | 2015-10-15 | 2015-10-15 | Non-polar port circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520805525.2U CN205051086U (en) | 2015-10-15 | 2015-10-15 | Non-polar port circuit |
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| Publication Number | Publication Date |
|---|---|
| CN205051086U true CN205051086U (en) | 2016-02-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520805525.2U Withdrawn - After Issue CN205051086U (en) | 2015-10-15 | 2015-10-15 | Non-polar port circuit |
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| CN (1) | CN205051086U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105244695A (en) * | 2015-10-15 | 2016-01-13 | 珠海格力电器股份有限公司 | Non-polar port circuit |
-
2015
- 2015-10-15 CN CN201520805525.2U patent/CN205051086U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105244695A (en) * | 2015-10-15 | 2016-01-13 | 珠海格力电器股份有限公司 | Non-polar port circuit |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20160224 Effective date of abandoning: 20171124 |