CN206559040U - A kind of electric equipment and its power supply output overvoltage regulating circuit - Google Patents
A kind of electric equipment and its power supply output overvoltage regulating circuit Download PDFInfo
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- CN206559040U CN206559040U CN201720226745.9U CN201720226745U CN206559040U CN 206559040 U CN206559040 U CN 206559040U CN 201720226745 U CN201720226745 U CN 201720226745U CN 206559040 U CN206559040 U CN 206559040U
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Abstract
The utility model discloses a kind of electric equipment and its power supply output overvoltage regulating circuit, wherein, the power supply output overvoltage regulating circuit includes Voltage stabilizing module, over-pressed adjustment module and switch module, power input and the power output end connection of the switch module and electric equipment；By Voltage stabilizing module, when detecting electric power output voltage more than threshold voltage, the over-pressed adjustment module of output startup voltage control is opened; the control voltage of switch module is adjusted the output to by over-pressed adjustment module; the switch module is controlled to disconnect; reduction electric power output voltage makes it be less than threshold voltage; voltage-regulation can be carried out when electric power output voltage is too high; output voltage is set to maintain all the time in normal range (NR); the damage to other circuit systems due to power supply output overvoltage is effectively prevent, the purpose for protecting whole circuit system is reached.
Description
Technical field
The utility model is related to appliances power source technical field, and more particularly to a kind of electric equipment and its power supply output overvoltage are adjusted
Economize on electricity road.
Background technology
It is well known that in electronic device field, especially home electronics, such as television set, PC, dust catcher, electric meal
Pot etc., required precision of these equipment to electric power output voltage is all higher, if output voltage fluctuation ratio is larger, causes output
Overtension, does not simply fail to allow this class of electronic devices normal work, and more serious, too high output voltage can even be burnt out and electricity
Some components on other circuit boards of source matching, cause whole equipment not use, and maintenance is inconvenient, maintenance price
It is high.
Thus prior art could be improved and improve.
Utility model content
In view of in place of above-mentioned the deficiencies in the prior art, the purpose of this utility model is to provide a kind of electric equipment and its electricity
Source output overvoltage regulating circuit, voltage-regulation can be carried out when electric power output voltage is too high, output voltage is maintained all the time just
In normal scope, the damage to other circuit systems due to power supply output overvoltage is effectively prevent, the whole circuit system of protection is reached
Purpose.
In order to achieve the above object, the utility model takes following technical scheme：
A kind of power supply output overvoltage regulating circuit, it includes Voltage stabilizing module, over-pressed adjustment module and switch module, described to open
The power input and power output end for closing module and electric equipment are connected；By Voltage stabilizing module to detect electric power output voltage big
Output starts the over-pressed adjustment module of voltage control and opened when threshold voltage, and switch module is adjusted the output to by over-pressed adjustment module
Control voltage, control the switch module to disconnect, reduction electric power output voltage makes it be less than threshold voltage.
In described power supply output overvoltage regulating circuit, the overvoltage regulating circuit is opened including the first partial pressure unit, first
Close unit, the second partial pressure unit, second switch unit and current limiting unit；
Output first voltage is carried out after partial pressure to the startup voltage to first switch unit by the first partial pressure unit, when the
When one voltage is more than the first preset value, the first switch unit conducting, the voltage of second partial pressure unit one end of control is pulled down to
Ground, the other end connection power input of the second partial pressure unit；
Output second voltage is carried out after partial pressure to power input voltage to second switch unit by the second partial pressure unit, when the
When two voltages are less than the second preset value, the second switch unit conducting, and tertiary voltage is exported to current limiting unit, through current limliting list
Member carries out output control voltage after current limliting processing and, to switch module, controls the switch module to disconnect.
In described power supply output overvoltage regulating circuit, the Voltage stabilizing module includes voltage-regulator diode, the pole of voltage stabilizing two
The negative pole of pipe connects the power output end and switch module, and the positive pole of the voltage-regulator diode connects the over-pressed adjustment module
Input.
In described power supply output overvoltage regulating circuit, the switch module includes metal-oxide-semiconductor, and the grid of the metal-oxide-semiconductor connects
Connect the output end of the over-pressed adjustment module, the source electrode connection power input of the metal-oxide-semiconductor, the drain electrode connection of the metal-oxide-semiconductor
The input of power output end and Voltage stabilizing module.
In described power supply output overvoltage regulating circuit, first partial pressure unit includes first resistor and second resistance,
The first switch unit includes the first triode, and second partial pressure unit includes 3rd resistor and the 4th resistance, described the
Two switch elements include the second triode, and the current limiting unit includes the 5th resistance；
One end of the first resistor connects the output end of Voltage stabilizing module, the other end connection the one or three of the first resistor
The base stage of pole pipe, also it is grounded by second resistance；The colelctor electrode of first triode connects the 4th resistance by 3rd resistor
One end and the second triode base stage, the grounded emitter of first triode；The other end connection of 4th resistance
The emitter stage of power input and the second triode；The colelctor electrode of second triode connects the switch by the 5th resistance
Module.
In described power supply output overvoltage regulating circuit, the metal-oxide-semiconductor is P-channel metal-oxide-semiconductor.
In described power supply output overvoltage regulating circuit, first triode is NPN type triode, the two or three pole
Manage as PNP type triode.
A kind of electric equipment, it includes power supply output overvoltage regulating circuit as described above.
In described electric equipment, the electric equipment includes television set, computer, dust catcher, micro-wave oven and/or electric cooker
In the electric equipment and its power supply output overvoltage regulating circuit that are provided compared to prior art, the utility model, institute
Stating power supply output overvoltage regulating circuit includes Voltage stabilizing module, over-pressed adjustment module and switch module, the switch module and electrical equipment
Power input and the power output end connection of equipment；By Voltage stabilizing module when detecting electric power output voltage more than threshold voltage
Output starts the over-pressed adjustment module of voltage control and opened, and the control voltage of switch module is adjusted the output to by over-pressed adjustment module,
The switch module is controlled to disconnect, reduction electric power output voltage makes it be less than threshold voltage, can be when electric power output voltage is too high
Voltage-regulation is carried out, output voltage is maintained all the time in normal range (NR), effectively prevent because power supply output overvoltage is to other
The damage of circuit system, reaches the purpose for protecting whole circuit system.
Brief description of the drawings
The structured flowchart for the power supply output overvoltage regulating circuit that Fig. 1 provides for the utility model.
The circuit diagram for the power supply output overvoltage regulating circuit that Fig. 2 provides for the utility model.
Embodiment
The utility model provides a kind of electric equipment and its power supply output overvoltage regulating circuit, can be in electric power output voltage mistake
Voltage-regulation is carried out when high, output voltage is maintained all the time in normal range (NR), be effectively prevent due to power supply output overvoltage pair
The damage of other circuit systems, reaches the purpose for protecting whole circuit system.
To make the purpose of this utility model, technical scheme and effect clearer, clear and definite, develop simultaneously implementation referring to the drawings
The utility model is further described example.It should be appreciated that specific embodiment described herein is only to explain this practicality
It is new, it is not used to limit the utility model.
Referring to Fig. 1, the power supply output overvoltage regulating circuit that the utility model is provided includes Voltage stabilizing module 10, overvoltage regulation
Module 20 and switch module 30, the switch module 30 are connected with the power input and power output end of electric equipment, described
The input connection power output end and switch module 30 of Voltage stabilizing module 10, the output end connection overvoltage of the Voltage stabilizing module 10 are adjusted
Save the input of module 20, the output end connecting valve module 30 of the over-pressed adjustment module 20.
When it is implemented, when detecting electric power output voltage more than threshold voltage, output starts voltage by Voltage stabilizing module 10
The over-pressed adjustment module 20 of control is opened, and the control voltage of switch module 30 is adjusted the output to by over-pressed adjustment module 20, institute is controlled
State switch module 30 to disconnect, reduction electric power output voltage makes it be less than threshold voltage.I.e. electric equipment normal work when, switching molding
Block 30 is conducting state, and when electric power output voltage VOUT is unstable, when being more than threshold voltage, Voltage stabilizing module 10, which will be exported, to be started
Voltage is to over-pressed adjustment module 20, and the over-pressed adjustment module 20 of control is opened, and over-pressed adjustment module 20 described afterwards is adjusted the output to
The control voltage of switch module 30 so that switch module 30 disconnects, then electric power output voltage VOUT start reduction, until less than threshold
Threshold voltage, now Voltage stabilizing module 10, which is no longer exported, starts voltage to over-pressed adjustment module 20, and over-pressed adjustment module 20 is stopped,
Switch module 30 is again restored to the working condition of conducting, power input voltage VIN by the switch module 30 of conducting export to
Power output end, so as to reach that electric power output voltage VOUT maintains the purpose in specified output voltage range all the time, has
Effect protects circuit system not to be damaged because of power supply output overvoltage.
Specifically, also referring to Fig. 2, the overvoltage regulating circuit includes the first partial pressure unit 201, first switch unit
202nd, the second partial pressure unit 203, second switch unit 204 and current limiting unit 205, first partial pressure unit 201, first switch
Unit 202, the second partial pressure unit 203, second switch unit 204 and current limiting unit 205 are sequentially connected, first partial pressure unit
201 are also connected with the output end of Voltage stabilizing module 10, and the current limiting unit 205 is also connected with switch module 30.
When it is implemented, carrying out after partial pressures output first voltage to the by 201 pairs of the first partial pressure unit voltages that start
One switch element 202, when first voltage is more than the first preset value, the first switch unit 202 is turned on, and controls the second partial pressure
The voltage of the one end of unit 203 pulls down to ground, the other end connection power input of the second partial pressure unit 203；By the second partial pressure list
203 pairs of power input voltages of member exported after partial pressure second voltage to second switch unit 204, when second voltage is less than second
During preset value, the second switch unit 204 is turned on, and exports tertiary voltage to current limiting unit 205, is entered through current limiting unit 205
Output control voltage controls the switch module 30 to disconnect to switch module 30 after the processing of row current limliting, so that deenergization is inputted
Path between end and power output end so that electric power output voltage is begun to decline, until less than threshold voltage, passing through first point
Pressure unit 201, first switch unit 202, the cooperation of the second partial pressure unit 203 and second switch unit 204 effectively ensure that
Input starts the normal startup work of over-pressed adjustment module 20 after voltage, it is ensured that timely controlling switch module 30 disconnects, and makes power supply
Output voltage declines, and current limliting module then can effectively prevent that branch current is excessive and burn component, improve the stability of circuit.
Further, the Voltage stabilizing module 10 includes voltage-regulator diode ZD, the voltage-regulator diode ZD negative pole connection institute
Power output end and switch module 30 are stated, the positive pole of the voltage-regulator diode ZD connects the input of the over-pressed adjustment module 20
End.The startup and pause of over-pressed adjustment module 20 are realized in the present embodiment by voltage-regulator diode ZD, works as electric power output voltage
VOUT is in overvoltage condition, now overtension, when electric power output voltage VOUT is more than voltage-regulator diode ZD load voltage value
When, voltage-regulator diode ZD, which can be reversed, punctures conducting, so that startup voltage is exported to over-pressed adjustment module 20, in the present embodiment,
Using voltage-regulator diode ZD load voltage value as threshold voltage, by selecting suitable voltage-regulator diode ZD, you can by power supply
Output voltage control is in different output voltage ranges, the need for meeting different appliances power sources, improves power supply output overvoltage
Adjust flexibility and the scope of application of circuit.
Further, the switch module 30 is included in metal-oxide-semiconductor M1, the present embodiment, and the metal-oxide-semiconductor M1 selects P-channel
Metal-oxide-semiconductor M1, wherein the grid of the metal-oxide-semiconductor M1 connects the output end of the over-pressed adjustment module 20, the source electrode of the metal-oxide-semiconductor M1
Connect power input, the drain electrode connection power output end and the input of Voltage stabilizing module 10 of the metal-oxide-semiconductor M1（That is the pole of voltage stabilizing two
Pipe ZD negative pole）.Using metal-oxide-semiconductor M1 on-off action come regulation power supply output voltage, when electric power output voltage VOUT is more than threshold
During threshold voltage, after over-pressed adjustment module 20 is started working, it exports to metal-oxide-semiconductor M1 grid voltage and can gradually risen, afterwards P ditches
Road metal-oxide-semiconductor M1 is by the working condition being off so that electric power output voltage VOUT is begun to decline, until less than threshold voltage,
Voltage output voltage is effectively reduced using metal-oxide-semiconductor M1 on off state, circuit is simple and reliable and stable, makes electric power output voltage
Maintained all the time in a controlled range according to metal-oxide-semiconductor M1 on off state.
Further, first partial pressure unit 201 includes first resistor R1 and second resistance R2, the first switch
Unit 202 includes the first triode Q1, and second partial pressure unit 203 includes 3rd resistor R3 and the 4th resistance R4, described the
Two switch elements 204 include the second triode Q2, and the current limiting unit 205 includes the 5th resistance R5, in the present embodiment, and described the
One triode Q1 is NPN type triode, and the second triode Q2 is PNP type triode.
One end of the first resistor R1 is the input of over-pressed adjustment module 20, connects the output end of Voltage stabilizing module 10
（That is voltage-regulator diode ZD positive pole）, the other end of the first resistor R1 connects the first triode Q1 base stage, also by the
Two resistance R2 are grounded；One end and second that the colelctor electrode of the first triode Q1 passes through the resistance R4 of 3rd resistor R3 connections the 4th
Triode Q2 base stage, the grounded emitter of the first triode Q1；The other end connection power supply of the 4th resistance R4 is defeated
Enter end and the second triode Q2 emitter stage；The colelctor electrode of the second triode Q2 passes through the 5th resistance R5 connections switch
Module 30, is used as the output end of over-pressed adjustment module 20.
When power supply output overvoltage, voltage-regulator diode ZD, which can be reversed, punctures conducting, so as to export startup voltage to overvoltage
Adjustment module 20, starts voltage and first voltage is exported after first resistor R1 and second resistance R2 partial pressures to the first triode Q1,
When first voltage is more than the first preset value（It is 0.7V in the present embodiment）, now the first triode of NPN type Q1 conductings, the two or three
Pole pipe Q2 collector voltage is pulled down to 0V, therefore the second triode of positive-negative-positive Q2 base stage input voltage is power input electricity
Second voltages of the VIN after 3rd resistor R3 and the 4th resistance R4 partial pressures is pressed, when second voltage is less than the second preset value（This reality
Apply in example is VIN-0.7V）, i.e. during second voltage at least 0.7V smaller than power input voltage VIN, the second triode Q2 will be turned on,
Colelctor electrode has tertiary voltage input, and it is approximately equal to power input voltage VIN, and the tertiary voltage of colelctor electrode passes through the 5th resistance afterwards
After R5 current limlitings output control voltage to P-channel metal-oxide-semiconductor M1 grid, metal-oxide-semiconductor M1 by original ON operation state switch to shut-off
State so that electric power output voltage VOUT is reduced, until it is reduced to below threshold voltage, it is impossible to puncture voltage-regulator diode ZD
When, electric power output voltage drop maintains that current state is constant, and over-pressed adjustment module 20 is stopped, and over-pressed regulation process is completed.
Not only circuit is simple for the utility model, reliable and stable, and prevents damage of the power supply output overvoltage to other circuit systems, reaches
To the purpose for protecting whole circuit system.
The utility model correspondingly provides a kind of electric equipment, and it includes power supply output overvoltage regulation electricity as described above
Road, the electric equipment includes television set, computer, dust catcher, micro-wave oven and/or electric cooker, due to above to the power supply
Output overvoltage regulating circuit is described in detail, and is not described further herein.
To be better understood from the utility model, below in conjunction with Fig. 2, the utility model is provided for concrete application embodiment
The regulation process of power supply output overvoltage regulating circuit is described in detail：
When electric power output voltage VOUT is in overvoltage condition, now, VOUT voltages can be higher, when it exceedes the pole of voltage stabilizing two
During pipe ZD specification voltage, over-pressed adjustment module 20 will be started working, and output overvoltage is adjusted.Specifically regulative mode is：
When output voltage VO UT, which is crossed, to be pressed onto beyond voltage-regulator diode ZD specification voltage（Voltage-regulator diode ZD specification voltage is tried one's best choosing
Select close to threshold voltage）, voltage-regulator diode ZD, which can be reversed, punctures conducting, and the voltage after conducting is by first resistor R1 and the
Two electric resistance partial pressures of resistance R2 two, if voltage is that the first triode Q1 base voltages are higher than 0.7V in NPN triode after partial pressure
During the above, now the first triode Q1 will be switched on, and the first triode Q1 collector voltage can be pulled to 0V, due to first
Triode Q1 collector voltages are pulled down to 0V, therefore PNP triode is that the second triode Q2 base stage input voltage is exactly defeated
Enter voltages of the voltage VIN after two electric resistance partial pressures of 3rd resistor R3 and the 4th resistance R4, when the second triode Q2 base stage
When voltage is less than VIN voltage 0.7V, the second triode Q2 will be fully turned on, and the second triode Q2 colelctor electrode will have voltage
Input, this input voltage is approximately equal to VIN voltage, and the second triode Q2 colelctor electrode input voltage passes through current-limiting resistance the 5th
P-channel metal-oxide-semiconductor M1 grid is reached after resistance R5, now, metal-oxide-semiconductor M1 grid voltage is just approximately equal to metal-oxide-semiconductor M1 source electrode electricity
VIN is pressed, now metal-oxide-semiconductor M1 will be changed into off state by original ON operation state, when metal-oxide-semiconductor M1 is off state
When, output voltage VO UT will be reduced, and when VOUT voltages, which are reduced to, can not puncture voltage-regulator diode ZD, now regulation process is complete
It will be maintained at that current state is constant into, output voltage VO UT, final output voltage is also maintained in rated range, realizes power supply
The regulation of output overvoltage.
In summary, in the utility model is provided electric equipment and its power supply output overvoltage regulating circuit, the power supply
Output overvoltage regulating circuit includes Voltage stabilizing module, over-pressed adjustment module and switch module, the switch module and electric equipment
Power input and power output end connection；By Voltage stabilizing module, when detecting electric power output voltage more than threshold voltage, output is opened
The dynamic over-pressed adjustment module of voltage control is opened, and the control voltage of switch module is adjusted the output to by over-pressed adjustment module, institute is controlled
Switch module disconnection is stated, reduction electric power output voltage makes it be less than threshold voltage, electricity can be carried out when electric power output voltage is too high
Pressure regulation, makes output voltage maintain all the time in normal range (NR), effectively prevent because power supply output overvoltage is to other circuit systems
The damage of system, reaches the purpose for protecting whole circuit system.
It is understood that for those of ordinary skills, can according to the technical solution of the utility model and
The design of its utility model is subject to equivalent substitution or change, and all these changes or replacement should all belong to appended by the utility model
Scope of the claims.
Claims (9)
1. a kind of power supply output overvoltage regulating circuit, it is characterised in that including Voltage stabilizing module, over-pressed adjustment module and switching molding
Block, power input and the power output end connection of the switch module and electric equipment；Power supply is being detected by Voltage stabilizing module
Output starts the over-pressed adjustment module of voltage control and opened when output voltage is more than threshold voltage, is adjusted and exported by over-pressed adjustment module
To the control voltage of switch module, the switch module is controlled to disconnect, reduction electric power output voltage makes it be less than threshold voltage.
2. power supply output overvoltage regulating circuit according to claim 1, it is characterised in that the overvoltage regulating circuit includes
First partial pressure unit, first switch unit, the second partial pressure unit, second switch unit and current limiting unit；
To the startup voltage export first voltage after partial pressure to first switch unit by the first partial pressure unit, when the first electricity
When pressure is more than the first preset value, the first switch unit conducting, the voltage of second partial pressure unit one end of control pulls down to ground, the
The other end connection power input of two partial pressure units；
Carry out exporting second voltage to power input voltage after partial pressure to second switch unit by the second partial pressure unit, when the second electricity
When pressure is less than the second preset value, the second switch unit conducting, and tertiary voltage is exported to current limiting unit, enter through current limiting unit
Output control voltage controls the switch module to disconnect to switch module after the processing of row current limliting.
3. power supply output overvoltage regulating circuit according to claim 1, it is characterised in that the Voltage stabilizing module includes voltage stabilizing
Diode, the negative pole of the voltage-regulator diode connects the power output end and switch module, the positive pole of the voltage-regulator diode
Connect the input of the over-pressed adjustment module.
4. power supply output overvoltage regulating circuit according to claim 1, it is characterised in that the switch module includes MOS
Pipe, the grid of the metal-oxide-semiconductor connects the output end of the over-pressed adjustment module, and the source electrode of the metal-oxide-semiconductor connects power input,
The drain electrode connection power output end and the input of Voltage stabilizing module of the metal-oxide-semiconductor.
5. power supply output overvoltage regulating circuit according to claim 2, it is characterised in that first partial pressure unit includes
First resistor and second resistance, the first switch unit include the first triode, and second partial pressure unit includes the 3rd electricity
Resistance and the 4th resistance, the second switch unit include the second triode, and the current limiting unit includes the 5th resistance；
One end of the first resistor connects the output end of Voltage stabilizing module, and the other end of the first resistor connects the first triode
Base stage, be also grounded by second resistance；The colelctor electrode of first triode connects the one of the 4th resistance by 3rd resistor
End and the base stage of the second triode, the grounded emitter of first triode；The other end connection power supply of 4th resistance
The emitter stage of input and the second triode；The colelctor electrode of second triode connects the switching molding by the 5th resistance
Block.
6. power supply output overvoltage regulating circuit according to claim 4, it is characterised in that the metal-oxide-semiconductor is P-channel MOS
Pipe.
7. power supply output overvoltage regulating circuit according to claim 5, it is characterised in that first triode is NPN
Type triode, second triode is PNP type triode.
8. a kind of electric equipment, it is characterised in that including the power supply output overvoltage regulation as described in claim 1-7 any one
Circuit.
9. electric equipment according to claim 8, it is characterised in that the electric equipment includes television set, computer, dust suction
Device, micro-wave oven and/or electric cooker.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720226745.9U CN206559040U (en) | 2017-03-09 | 2017-03-09 | A kind of electric equipment and its power supply output overvoltage regulating circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720226745.9U CN206559040U (en) | 2017-03-09 | 2017-03-09 | A kind of electric equipment and its power supply output overvoltage regulating circuit |
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| Publication Number | Publication Date |
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| CN206559040U true CN206559040U (en) | 2017-10-13 |
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| CN201720226745.9U Active CN206559040U (en) | 2017-03-09 | 2017-03-09 | A kind of electric equipment and its power supply output overvoltage regulating circuit |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110011272A (en) * | 2018-12-06 | 2019-07-12 | 珠海逸腾电控技术有限公司 | A kind of overvoltage crowbar |
| CN111130085A (en) * | 2019-11-18 | 2020-05-08 | 华勤通讯技术有限公司 | Interface EOS protection circuit, electronic equipment and control method |
| CN112242692A (en) * | 2019-07-18 | 2021-01-19 | 浙江宇视科技有限公司 | Overcurrent protection circuit and power supply circuit |
-
2017
- 2017-03-09 CN CN201720226745.9U patent/CN206559040U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110011272A (en) * | 2018-12-06 | 2019-07-12 | 珠海逸腾电控技术有限公司 | A kind of overvoltage crowbar |
| CN112242692A (en) * | 2019-07-18 | 2021-01-19 | 浙江宇视科技有限公司 | Overcurrent protection circuit and power supply circuit |
| CN112242692B (en) * | 2019-07-18 | 2022-10-04 | 浙江宇视科技有限公司 | Overcurrent protection circuit and power supply circuit |
| CN111130085A (en) * | 2019-11-18 | 2020-05-08 | 华勤通讯技术有限公司 | Interface EOS protection circuit, electronic equipment and control method |
| CN111130085B (en) * | 2019-11-18 | 2022-09-30 | 华勤技术股份有限公司 | Interface EOS protection circuit, electronic equipment and control method |
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Effective date of registration: 20210819 Address after: 14 / F, block a, Skyworth building, Gaoxin South 1st Road, Nanshan District, Shenzhen, Guangdong 518000 Patentee after: SHENZHEN SKYWORTH DIGITAL TECHNOLOGY Co.,Ltd. Address before: 518118 No.1, Baolong 6th Road, Baolong Industrial City, Longgang District, Shenzhen City, Guangdong Province Patentee before: SHENZHEN SKYWORTH QUNXIN SECURITY TECHNOLOGY Co.,Ltd. |
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