CN208910686U - Welding mirror - Google Patents
Welding mirror Download PDFInfo
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- CN208910686U CN208910686U CN201821111393.3U CN201821111393U CN208910686U CN 208910686 U CN208910686 U CN 208910686U CN 201821111393 U CN201821111393 U CN 201821111393U CN 208910686 U CN208910686 U CN 208910686U
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Abstract
A kind of welding mirror, it include: controller, arc light detecting circuit, eyeglass darkening circuit and eyeglass, wherein: the arc light detecting circuit, it is coupled with the controller and the eyeglass darkening circuit, suitable for generating the first trigger signal when detecting arc light and exporting to the controller and the eyeglass darkening circuit；The controller, including the first trigger signal test side, first trigger signal test side and the arc light detecting circuit couple；The controller is suitable for being waken up when receiving first trigger signal；The eyeglass darkening circuit is coupled with power supply, the arc light detecting circuit and the eyeglass, suitable for forming access between the power supply and the eyeglass when receiving first trigger signal, so that the power supply is powered to the eyeglass；The eyeglass, suitable for the darkening when powering on.The eyeglass darkening response speed of welding mirror can be improved in above scheme.
Description
Technical field
The utility model relates to be welded field more particularly to a kind of welding mirror.
Background technique
Welding mirror is to protect the eyes of electric welder and the special spectacles that design, compared with previous electric welding mask, welding mirror
It is more convenient to use, and appearance is also more beautiful.
When using traditional welding mirror, it usually needs the manual moving lens piece of user, it is careless slightly to burn to user
Eyes.In the prior art, there is the welding mirror with automatic beam change function, can realize eyeglass according to the power of light
Automatic beam change.
However, the existing welding mirror with automatic beam change function is when controlling eyeglass darkening, response speed is slower, exists
It burns the hidden danger of eyes of user.
Utility model content
What the utility model embodiment solved is how to improve the eyeglass darkening response speed of welding mirror.
In order to solve the above technical problems, the utility model embodiment provides a kind of welding mirror, comprising: controller, arc light inspection
Slowdown monitoring circuit, eyeglass darkening circuit and eyeglass, in which: the arc light detecting circuit becomes with the controller and the eyeglass
Optical circuit coupling becomes suitable for generating the first trigger signal when detecting arc light and exporting to the controller and the eyeglass
Optical circuit；The controller, including the first trigger signal test side, first trigger signal test side and the arc light detecting
Circuit coupling；The controller is suitable for being waken up when receiving first trigger signal；The controller, including the first touching
Signalling test side, first trigger signal test side and the arc light detecting circuit couple；The controller is suitable for connecing
It is waken up when receiving first trigger signal；Eyeglass light transmittance when powering on becomes smaller.
Optionally, the welding mirror further include: sensitivity adjustment key is coupled with the controller, is suitable for generating sensitive
Degree adjustment signal simultaneously exports；The controller, including sensitivity control terminal, the sensitivity control terminal and arc light detecting electricity
Road coupling；The controller, suitable for when receiving the sensitivity adjustment signal, Xiang Suoshu arc light detecting circuit output and institute
State the corresponding level of sensitivity adjustment signal；The arc light detecting circuit, comprising: voltage follower, sensitivity adjusting circuit with
And comparator, in which: the photo resistance of the voltage follower, input terminal and the eyeglass couples, and output end is compared with described
The first input end of device couples, suitable for acquiring the voltage of the photo resistance and amplifying；The sensitivity adjusting circuit, it is defeated
Enter end to couple with the sensitivity control terminal, the second input terminal of output end and the comparator couples；The comparator, output
End is coupled with first trigger signal test side.
Optionally, the sensitivity control terminal includes the first sensitivity control terminal and the second sensitivity control terminal；It is described
Sensitivity adjusting circuit includes: the first adjustment of sensitivity unit and the second adjustment of sensitivity unit, the first sensitivity control
End processed and the first adjustment of sensitivity unit couple, the second sensitivity control terminal and the second adjustment of sensitivity unit
Coupling；Wherein: the first adjustment of sensitivity unit, comprising: the first filter resistance, the first filter capacitor, the first NMOS tube,
One divider resistance and the second divider resistance, in which: first filter resistance, first end and the first sensitivity control terminal
The grid of coupling, second end and first NMOS tube couples；First filter capacitor, first end and first filtered electrical
The second end of resistance couples, and the source electrode of second end and first NMOS tube couples；First NMOS tube, source electrode and ground couple,
Drain electrode and the first end of first divider resistance couple；The second of second divider resistance, first end and the comparator
Input terminal coupling, second end input high level；The second adjustment of sensitivity unit, comprising: the second filter resistance, the second filtering
Capacitor, the second NMOS tube and third divider resistance, in which: second filter resistance, first end and second sensitivity
The grid of control terminal coupling, second end and second NMOS tube couples；Second filter capacitor, first end and described second
The second end of filter resistance couples, and the source electrode of second end and second NMOS tube couples；Second NMOS tube, source electrode and ground
Coupling, drain electrode and the first end of the third divider resistance couple；The second end of the third divider resistance with described first point
The second end of piezoresistance couples.
Optionally, the sensitivity adjusting circuit further include: third filter resistance and third filter capacitor, in which: institute
Third filter resistance is stated, the first end coupling of first end and the third divider resistance, second end and ground couple；The third filter
The first end of wave capacitor, first end and the third divider resistance couples, and second end and ground couple.
Optionally, the welding mirror further include: the high-voltage power supply circuit with eyeglass darkening circuit coupling, the high pressure
The output voltage of power supply circuit is negative value, and the absolute value of the output voltage of the high-voltage power supply circuit is greater than the defeated of the power supply
Voltage out.
Optionally, the eyeglass darkening circuit, comprising: the 4th divider resistance, the 5th divider resistance, third capacitor, third
NMOS tube, the first current-limiting resistance, the second current-limiting resistance, third current-limiting resistance, the 4th current-limiting resistance, the first triode and the 4th
Capacitor, in which: the third NMOS tube, drain electrode are coupled with the eyeglass, the first end coupling of grid and the 4th divider resistance
It connects, the output end of source electrode and the high-voltage power supply circuit couples；4th divider resistance, first end and the third NMOS tube
Grid coupling, the output end of second end and the high-voltage power supply circuit couples；5th divider resistance, first end with it is described
The output end of high-voltage power supply circuit couples, and the second end of second end and the third capacitor couples；The third capacitor, first end
It is coupled with the first end of the 4th divider resistance, the second end of second end and second divider resistance couples；Described first
The second end of triode, collector and the 5th divider resistance couples, the first end coupling of base stage and the third current-limiting resistance
It connects, first end, the first end of second current-limiting circuit of emitter and first current-limiting resistance couple；First current limliting
Resistance, second end input high level；The base stage of second current-limiting resistance, second end and first triode couples；It is described
Third current-limiting resistance, second end input high level；The base stage of 4th capacitor, first end and first triode couples,
Second end and the first end of the 4th current-limiting resistance couple；4th current-limiting resistance, the of second end and the controller
The coupling of one trigger signal test side.
Optionally, the eyeglass darkening circuit, further includes: the 5th capacitor, the of first end and the third current-limiting resistance
The coupling of two ends, second end and ground couple.
Optionally, the welding mirror, further includes: power control circuit；The controller, with the power control circuit coupling
It connects, suitable for generating driving signal when receiving second trigger signal and exporting to the power control circuit；The electricity
Source control circuit is coupled between the power supply and the controller, suitable for generating the second trigger signal when being triggered, is being connect
Switch the connection status between the power supply and the controller when receiving the driving signal.
Optionally, the power control circuit, comprising: power switch button, diode, the 5th current-limiting resistance, the 6th point
Piezoresistance, the 7th divider resistance, the second triode and PMOS tube, in which: the power switch button, with the diode
Cathode coupling；The diode, the positive collector with second triode couple, cathode and the power switch button coupling
It connects；Second triode, the first end of emitter and the 6th divider resistance, couple, base stage and the 6th partial pressure
The second end of resistance couples；The base stage of 7th divider resistance, first end and second triode couples, second end and institute
State the power control terminal coupling of controller；5th current-limiting resistance, is coupled between the grid and source electrode of the PMOS tube；Institute
PMOS tube is stated, drain input high level signal, and the first end of grid and the 5th current-limiting resistance couples, drain electrode and the described 5th
The second end of current-limiting resistance and the supply coupling.
Optionally, the welding mirror further include: shading adjusts key, couples with the controller, is suitable for generating shading tune
Whole trigger signal is simultaneously exported to the controller；The controller is further adapted for when receiving the shading adjustment trigger signal,
It generates shading adjustment signal corresponding with shading adjustment trigger signal and exports to the eyeglass；The eyeglass, is further adapted for
When receiving the shading adjustment signal, shade number is adjusted.
Compared with prior art, the technical solution of the utility model embodiment has the advantages that
When arc light detecting circuit detects arc light, generates the first trigger signal and export to controller and eyeglass darkening
Circuit.When eyeglass darkening circuit receives the first trigger signal, access will be formed between power supply and eyeglass, so that power supply is to eyeglass
Power supply, so that eyeglass darkening.Controller is waken up when receiving the first trigger signal, that is to say, that in controller quilt
During wake-up, eyeglass has been carried out darkening, to greatly improve the response speed of eyeglass darkening, reduces user's eye of burning
The hidden danger of eyeball.
Further, sensitivity adjustment signal is generated when sensitivity adjustment key is triggered and is exported, and controller is examined to arc light
Slowdown monitoring circuit exports level corresponding with sensitivity adjustment signal, is adjusted to the level of the input terminal of comparator, to realize
Arc light detecting sensitivity adjustment.
In addition, setting power control circuit, so that be fully disconnected between power supply and controller when not using welding mirror,
So that the power consumption of welding mirror in the dormant state is zero, standby zero-power-consumption is realized.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of one of the utility model embodiment welding mirror；
Fig. 2 is the structural schematic diagram of one of the utility model embodiment arc light detecting circuit；
Fig. 3 is the structural schematic diagram of one of the utility model embodiment eyeglass darkening circuit；
Fig. 4 is the structural schematic diagram of one of the utility model embodiment power control circuit.
Specific embodiment
Although existing automatic beam change welding mirror can be with automatic beam change, circuit structure is complex, response speed compared with
Slowly, and user can not be from main regulation brightness.
In the utility model embodiment, when arc light detecting circuit detects arc light, the first trigger signal of generation is simultaneously defeated
Out to controller and eyeglass darkening circuit.It, will be between power supply and eyeglass when eyeglass darkening circuit receives the first trigger signal
Access is formed, so that power supply is powered to eyeglass, so that eyeglass darkening.Controller is called out when receiving the first trigger signal
It wakes up, that is to say, that during controller is waken up, eyeglass has been carried out darkening, to greatly improve eyeglass darkening
Response speed reduces the hidden danger for eyes of user of burning.
It is understandable to enable the above-mentioned purpose, feature and beneficial effect of the utility model to become apparent, with reference to the accompanying drawing
Specific embodiment of the utility model is described in detail.
Referring to Fig.1, the structural schematic diagram of one of the utility model embodiment welding mirror is given.The utility model is real
It applies in example, welding mirror may include: controller 11, arc light detecting circuit 12, eyeglass darkening circuit 13 and eyeglass 14, in which:
Arc light detecting circuit 12 is coupled with controller 11 and eyeglass darkening circuit 13 respectively, be adapted to detect for it is current whether
There are arc lights.The first trigger signal can be generated when detecting arc light for arc light detecting circuit 12, and the first of generation is triggered
Signal is exported respectively to controller 11 and eyeglass darkening circuit 13.
The first trigger signal test side, the first trigger signal test side and arc light detecting can be set on controller 11
Circuit 12 couples.When controller 11 detects that the input of the first trigger signal test side has the first trigger signal, 11 quilt of controller
It wakes up.
In practical applications, when welding mirror powers on, arc light detecting circuit 12 can export high level signal.When arc light is examined
When slowdown monitoring circuit 12 detects arc light, first trigger signal generated of arc light detecting circuit 12 can be low level signal.Work as control
When device 11 processed detects that the level of the first trigger signal test side switches to low level by high level, that is, it can determine that and receive arc light
The first trigger signal that detection circuit 12 exports, to be waken up.
Eyeglass darkening circuit 13 is coupled with controller 11, power supply 18, arc light detecting circuit 12 and eyeglass 14 respectively.Work as mirror
It, can be between power supply 18 and eyeglass 14 when piece darkening circuit 13 detects the first trigger signal that arc light detecting circuit 12 exports
Access is formed, so that power supply 18 is powered to eyeglass 14.
When powering on, the light transmittance of eyeglass 14 can change rapidly eyeglass 14.In practical applications, welding mirror is not having
When powering on, the corresponding light transmittance of eyeglass 14 is larger；When powering on, the light transmittance of eyeglass 14 is smaller, so as to effective protection behaviour
Make the eyes of personnel.
In the utility model embodiment, for eyeglass 14 when powering on, corresponding light transmittance can be preparatory for controller 11
The light transmittance of setting.For example, the light transmittance for presetting eyeglass 14 in controller 11 is 25%, eyeglass 14 is saturating when not powering on
Light rate is 70%.Then for eyeglass 14 when powering on, light transmittance is down to 25% from 70%.
Controller 11 can control the light transmittance of eyeglass 14 by control eyeglass darkening circuit 13.Work as controller
When detecting that eyeglass 14 powers on, controller sends the control signal that light transmittance is 70% to eyeglass darkening circuit 13.Eyeglass darkening
Circuit 13 is after receiving the control signal that light transmittance is 70%, and adjustment is input to the electric current of eyeglass 14, so that eyeglass 14 is saturating
Light rate is down to 25% from 70%.
Therefore the welding mirror provided in the utility model embodiment, it can be realized during controller 11 is waken up
The quick darkening of eyeglass 14, so as to more efficiently protect the eyes of welding mirror operator.
In specific implementation, welding mirror can also include sensitivity adjustment key 15, sensitivity adjustment key 15 and control
Device 11 couples, and is suitable for generating sensitivity adjustment signal and exports to controller 11.
Controller 11 can also include sensitivity adjustment signal input part and sensitivity control terminal.Controller 11 it is sensitive
It spends adjustment signal input terminal and sensitivity adjustment key 15 couples, the sensitivity control terminal and arc light detecting circuit 12 of controller 11
Coupling.Controller 11, can be via sensitive when detecting that the input of sensitivity adjustment signal input part has sensitivity adjustment signal
It spends control terminal and exports level corresponding with sensitivity adjustment signal to arc light detecting circuit 12.
In specific implementation, the number of sensitivity adjustment key 15 can be one or more.When operator is to sensitivity
When adjusting the progress different operation of key 15, the sensitivity adjustment signal that sensitivity adjustment key 15 generates can be different.Controller
11 can export varying level to arc light detecting circuit 12 via sensitivity control terminal according to different sensitivity adjustment signals.
For example, the number of sensitivity adjustment key is 2, when wherein 1 sensitivity adjustment key is triggered, it is set
Corresponding state is 1；When sensitivity key is not triggered, its corresponding state is set as 0.Therefore, 2 sensitivity adjustments are pressed
The corresponding state of key includes 4 kinds of situations, is followed successively by 00,01,10,11.It, can when the state of sensitivity adjustment key changes
To generate sensitivity adjustment signal, sensitivity adjustment signal generated includes the shape of the sensitivity adjustment key after changing
State.
For example, the corresponding state of 2 sensitivity adjustment keys is 00, operator's trigger sensitivity adjusts key 1, this
When, the corresponding state of 2 sensitivity adjustment keys is switched to 10 from 00.Sensitivity adjustment key generates sensitivity adjustment signal,
In sensitivity adjustment signal generated, the state 10 including the sensitivity adjustment key after changing.
Controller 11 when receiving sensitivity adjustment signal, can therefrom obtain the sensitivity adjustment after changing by
The state of key 15.According to the mapping relations of the state of sensitivity adjustment key 15 and level, the sensitivity after changing is searched
The corresponding level of state of key 15 is adjusted, and is exported via sensitivity control terminal to arc light detecting circuit 12.
For example, the corresponding state of sensitivity adjustment key after changing is 10, then controller 11 is via sensitivity control terminal,
To the corresponding level of 12 output state of arc light detecting circuit 10.
Arc light detecting circuit 12 may include: voltage follower, sensitivity adjusting circuit and comparator, in which: voltage
The photo resistance of the input terminal and eyeglass 14 of follower couples, the output end of voltage follower and the first input end coupling of comparator
Connect, voltage follower can acquire the voltage of photo resistance and amplify, the voltage input of amplified photo resistance to than
Compared with the first input end of device；The input terminal of sensitivity adjusting circuit and the sensitivity control terminal of controller 11 couple, sensitivity tune
The output end on economize on electricity road and the second input terminal of comparator couple；The first input end of comparator and the output end of voltage follower
Coupling, the output end of comparator and the first trigger signal input terminal of controller 11 couple.
In the utility model embodiment, the first input end of comparator can be the "-" input terminal of comparator, comparator
The second input terminal can be comparator "+" input terminal.
When sensitivity adjustment key 15 is triggered, generates sensitivity adjustment signal and export to controller 11.Controller
The 11 sensitivity adjustment signals generated according to the sensitivity adjustment key 15 that is triggered, to the output of arc light detecting circuit 12 with it is sensitive
Spend the corresponding level of adjustment signal.Arc light detecting circuit 12 is receiving controller 11.From the foregoing, it will be observed that operator can pass through
Trigger sensitivity adjusts key 15 to adjust the sensitivity of arc light detecting.
The arc light detecting circuit 12 provided in the utility model embodiment is illustrated below.
Referring to Fig. 2, the structural schematic diagram of one of the utility model embodiment arc light detecting circuit 12 is given, below
It is illustrated in conjunction with Fig. 1.
In specific implementation, arc light detecting circuit 12 may include voltage follower 21, sensitivity adjusting circuit 22 and
Comparator 23, in which: the photo resistance of voltage follower 21, input terminal and eyeglass 14 couples, and the of output end and comparator 23
One input terminal coupling, suitable for acquiring the voltage of photo resistance and amplifying；Sensitivity adjusting circuit 22, input terminal and controller
11 sensitivity controller 11 couples, and the second input terminal of output end and comparator 23 couples；The output end of comparator 23 and control
First trigger signal test side CF of device 11 processed is coupled.
Sensitivity control terminal may include the first sensitivity control terminal and the second sensitivity control terminal, correspondingly, sensitive
It may include: the first adjustment of sensitivity unit and the second adjustment of sensitivity unit that degree, which adjusts circuit, in which: the first sensitivity control
End processed and the first adjustment of sensitivity unit couple, and the second sensitivity control terminal and the second adjustment of sensitivity unit couple.
In specific implementation, the first adjustment of sensitivity unit may include: the first filter resistance R11, the first filter capacitor
C11, the first NMOS tube MN1, the first divider resistance R21 and the second divider resistance R22, in which:
The first end of first filter resistance R11 and the first sensitivity control terminal F1 of controller 11 are coupled, the first filtered electrical
The grid of the second end and the first NMOS tube MN1 that hinder R11 couples；
The first end of first filter capacitor C11 and the second end of the first filter resistance R11 couple, the first filter capacitor C11
Second end and the first NMOS tube MN1 source electrode couple；
The source electrode of first NMOS tube MN1 and ground couple, and the of the drain electrode of the first NMOS tube MN1 and the first divider resistance R21
The second end of one end coupling, the grid of the first NMOS tube MN1 and the first filter resistance R11 couple；
The first end of the first NMOS tube of first end MN1 of first divider resistance R21 couples, and the of the first divider resistance R21
The first end of two ends and third divider resistance R23 couple；
The first end of the second divider resistance R22 and the second input terminal of comparator 23 couple, the second divider resistance R22
Second end and input high level VCC.
In specific implementation, the second adjustment of sensitivity unit may include: the second filter resistance R12, the second filter capacitor
C12, the second NMOS tube MN2 and third divider resistance R23, in which:
The first end of second filter resistance R12 and the second sensitivity control terminal F2 of controller 11 are coupled, the second filtered electrical
The grid of the second end and the second NMOS tube MN2 that hinder R12 couples；
The first end of second filter capacitor C12 and the second end of the second filter resistance R12 couple, second end and the 2nd NMOS
The source electrode of pipe MN2 couples；
The source electrode of second NMOS tube MN2 and ground couple, and the of the drain electrode of the second NMOS tube MN2 and third divider resistance R23
One end coupling；
The second end of third divider resistance R23 and the second end of the first divider resistance R21 couple.
In conjunction with FIG. 1 to FIG. 2, when arc light detecting circuit 12 does not detect arc light, the first trigger signal of controller 11
Input terminal CF is high level.Arc light detecting circuit 12 is when detecting arc light, the first trigger signal input terminal CF of controller 11
Level switch to low level from high level.Controller 11 controls the first sensitivity control terminal F1 and the second sensitivity control terminal
The output level of F2 realizes sensitivity adjustment to change the voltage of the second input terminal of comparator 23.
In specific implementation, the first trigger signal input terminal CF, the first sensitivity control terminal F1 and second of controller
Sensitivity control terminal F2 all can be general purpose I/O port.
In specific implementation, sensitivity adjusting circuit 22 can also include third filter resistance R13 and third filter capacitor
C13, in which: the first end of third filter resistance R13 and the first end of third divider resistance R23 couple, third filter resistance R13
Second end and ground couple；The first end of third filter capacitor C13 and the first end of third divider resistance R23 couple, third filter
The second end and ground of wave capacitor C13 couples.
Referring to Fig. 3, the structural schematic diagram of one of the utility model embodiment eyeglass darkening circuit 13 is given.
In specific implementation, eyeglass darkening circuit 13 may include: the 4th divider resistance R24, the 5th divider resistance R25,
Third capacitor C3, third NMOS tube MN3, the first current-limiting resistance R31, the second current-limiting resistance R32, third current-limiting resistance R33, the 4th
Current-limiting resistance R34, the first triode Q1 and the 4th capacitor C4, in which:
The drain electrode of third NMOS tube MN3 and eyeglass 14 couple, the grid and the 4th divider resistance R24 of third NMOS tube MN3
First end coupling, the output end of the source electrode of third NMOS tube MN3 and high-voltage power supply circuit 17 couples；
The grid of the first end of 4th divider resistance R24 and third NMOS tube MN3 couple, and the of the 4th divider resistance R24
The output end of two ends and high-voltage power supply circuit 17 couples；
The second of the output end of the first end of 5th divider resistance R25 and high-voltage power supply circuit 17, the 4th divider resistance R24
The second end of end coupling, second end and third capacitor C3 couple；
The first end of third capacitor C3 and the first end of the 4th divider resistance R24 couple, the second end of third capacitor C3 with
The second end of 5th divider resistance R25 couples；
The collector of first triode Q1 and the second end of the 5th divider resistance R25 couple, the base stage of the first triode Q1
It is coupled with the first end of third current-limiting resistance R33, the first end of the emitter of the first triode Q1 and the first current-limiting resistance R31,
The first end of second current-limiting resistance R32 couples；
The emitter of the first end of first current-limiting resistance R31 and the first triode Q1 couple, and second end can input high electricity
Flat VCC；
The first end of second current-limiting resistance R32 and the emitter second end of the first triode Q1 can be with the first triode Q1
Base stage coupling；
The second end and input high level VCC of third current-limiting resistance R33；
The first end of 4th capacitor C4 and the base stage of the first triode Q1 couple, the second end of the 4th capacitor C4 and the 4th limit
The first end of leakage resistance R34 couples；
The first end of the 4th current-limiting resistance R34 and the second end of the 4th capacitor C4 couple, second end and controller 11
The first trigger signal test side coupling.
Between VCC and ground, connect the 5th capacitor C5, for decoupling and power filter.
The working principle of the eyeglass darkening circuit 13 provided in the utility model embodiment is illustrated below.
When the incoming level of the first trigger signal input terminal of controller 11 is switched to low level by high level, controller
11 are waken up, and the light transmittance that the eyeglass 14 of welding mirror is then controlled by controller 11 becomes smaller.However, the wake-up of controller 11 needs
One of short duration time, the arc light for being welded generation at this time may still damage the eyes of operator.
During controller 11 wakes up, eyeglass darkening circuit 13 detects the input of the first trigger signal input terminal CF
When level is switched to low level by high level, power supply charges to the 4th capacitor C4, so that the first triode Q1 is connected,
So that third NMOS tube MN3 is connected, so that eyeglass 14 powers on.After power-up, light transmittance declines rapidly eyeglass 14, thus
Darkening can be realized during controller 11 is waken up, with effective protection operator.
For the darkening speed for further increasing eyeglass 14, in the utility model embodiment, welding mirror can also include: height
Press power supply circuit 17.High-voltage power supply circuit 17 can be coupled with eyeglass darkening circuit 13, and the output electricity of high-voltage power supply circuit 17
Pressure is negative value, and the absolute value of the output voltage of high-voltage power supply circuit 17 is greater than the output voltage of power supply.
Referring to Fig. 3, the output end of high-voltage power supply circuit and the source electrode of third NMOS tube MN3 are coupled.
Since the output voltage of high-voltage power supply circuit 17 is negative value, third NMOS tube MN3 can more promptly be led
It is logical, to effectively improve the speed of 14 darkening of eyeglass.
In specific implementation, welding mirror can also include power control circuit 16, and power control circuit 16 is coupled in power supply
Between controller 11.When power control circuit 16 is triggered, power control circuit 16 generates the second trigger signal, Yi Ji
Connection status when receiving driving signal between Switching power and controller 11.Controller 11 and 16 coupling of power control circuit
It connects, driving signal is generated when receiving the second trigger signal and exports to power control circuit 16.
In the utility model embodiment, in the case where welding mirror is in energization operating status, power control circuit 16 is being received
The access between power supply and controller 11 is disconnected when to driving signal；In the case where welding mirror is in power-off closed state, power supply control
Circuit 16 forms the access between power supply and controller 11 when receiving driving signal.
The power control circuit 16 provided in the utility model embodiment is illustrated below.
Referring to Fig. 4, the structural schematic diagram of one of the utility model embodiment power control circuit 16 is given.Fig. 4
In, power control circuit 16 may include: power switch button 41, diode D1, the 5th current-limiting resistance R35, the 6th partial pressure electricity
Hinder R26, the 7th divider resistance R27, the second triode Q2 and PMOS tube MP1, in which:
Power switch button 41 is coupled with the cathode of diode D1；
The collector of diode D1, anode and the second triode Q2 couple, and cathode and power switch button 41 couple；
The first end of second triode Q2, emitter and the 6th divider resistance R26, couple, base stage and the 6th partial pressure electricity
Hinder the second end coupling of R26；
The base stage of 7th divider resistance R27, first end and the second triode Q2 couple, the power supply of second end and controller 11
Control terminal coupling；
5th current-limiting resistance R35 is coupled between the grid and source electrode of PMOS tube MP1；
PMOS tube MP1, drain input high level VCC, and the first end of grid and the 5th current-limiting resistance R35 couple, drain electrode and
The second end and supply coupling of 5th current-limiting resistance R35.
In the power-offstate, operator can trigger power switch button 41, at this point, POWER_KEY pin becomes low
Level.When power switch button 41 is triggered, PMOS tube MP1 conducting, battery B1 is powered system.When controller 11 is examined
After measuring 41 long-pressing for a period of time of power switch button, POW_KEY pin output high level shutdown PMOS tube can control
MP1, to cut off power supply of the battery to system, so that welding mirror zero-power in the power-offstate.
In specific implementation, welding mirror can also include that shading adjusts key.Shading adjusts key and controller 11 couples,
Shading adjustment signal is generated when being triggered and is exported to controller 11.Controller 11 is further adapted for receiving shading adjustment touching
When signalling, generates shading adjustment signal corresponding with shading adjustment trigger signal and export to eyeglass 14；Eyeglass 14, is further adapted for
When receiving shading adjustment signal, shade number is adjusted.
In practical applications, when user carries out different operations to shading adjustment key, shading adjustment key can be given birth to
Trigger signal is adjusted at corresponding shading, it includes target shade number in trigger signal that shading, which adjusts,.Controller 11 is receiving screening
After light adjusts trigger signal, target shade number can be therefrom obtained, and generate shading adjustment signal corresponding with target shade number
And it exports to eyeglass 14.Eyeglass 14 is adjusted to target shade number after receiving shading adjustment signal, by shade number.
For example, shading adjustment key includes: shading adjustment key 1 and shading adjustment key 2.When shading adjusts key 1
It is pressed, when shading adjustment key 2 is not pressed, shading adjusts key and generates corresponding shading adjustment trigger signal, shading tune
The target shade number for including in whole trigger signal is shade number 3.Controller 11 adjusts trigger signal according to shading and generates shading tune
Entire signal is simultaneously exported to eyeglass 14, and shade number is adjusted to shade number 3 after receiving shading adjustment signal by eyeglass 14.
It in the utility model embodiment, couples, can regard as and supply coupling namely power supply with high level VCC
Output voltage is VCC.
Although the utility model discloses as above, the utility model is not limited to this.Anyone skilled in the art,
It does not depart from the spirit and scope of the utility model, can make various changes or modifications, therefore the protection scope of the utility model
It should be defined by the scope defined by the claims..
Claims (10)
1. a kind of welding mirror characterized by comprising controller, arc light detecting circuit, eyeglass darkening circuit and eyeglass,
In:
The arc light detecting circuit is coupled with the controller and the eyeglass darkening circuit, suitable for when detecting arc light
It generates the first trigger signal and exports to the controller and the eyeglass darkening circuit；
The controller, including the first trigger signal test side, first trigger signal test side and arc light detecting electricity
Road coupling；The controller is suitable for being waken up when receiving first trigger signal；
The eyeglass darkening circuit is coupled with power supply, the arc light detecting circuit and the eyeglass, suitable for receive it is described
When the first trigger signal, access is formed between the power supply and the eyeglass, so that the power supply is powered to the eyeglass；
Eyeglass light transmittance when powering on becomes smaller.
2. welding mirror as described in claim 1, which is characterized in that further include: sensitivity adjustment key, with the controller coupling
It connects, suitable for generating sensitivity adjustment signal and exporting；
The controller is coupled with the sensitivity adjustment key, including sensitivity adjustment signal input part and sensitivity control
End processed, the sensitivity adjustment signal input part and the sensitivity adjustment key couple, the sensitivity control terminal with it is described
The coupling of arc light detecting circuit；The controller, suitable for when receiving the sensitivity adjustment signal, via the sensitivity control
End processed is to arc light detecting circuit output level corresponding with the sensitivity adjustment signal；
The arc light detecting circuit, comprising: voltage follower, sensitivity adjusting circuit and comparator, in which:
The photo resistance of the voltage follower, input terminal and the eyeglass couples, and the first of output end and the comparator is defeated
Enter end coupling, suitable for acquiring the voltage of the photo resistance and amplifying；
The sensitivity adjusting circuit, input terminal and the sensitivity control terminal couple, and the second of output end and the comparator
Input terminal coupling；
First trigger signal input terminal of the comparator, output end and the controller couples.
3. welding mirror as claimed in claim 2, which is characterized in that the sensitivity control terminal includes the first sensitivity control terminal
And the second sensitivity control terminal；The sensitivity adjusting circuit includes: the first adjustment of sensitivity unit and the second sensitivity
Unit is adjusted, the first sensitivity control terminal and the first adjustment of sensitivity unit couple, the second sensitivity control
End is coupled with the second adjustment of sensitivity unit；Wherein:
The first adjustment of sensitivity unit, comprising: the first filter resistance, the first filter capacitor, the first NMOS tube, the first partial pressure
Resistance and the second divider resistance, in which: first filter resistance, first end and the first sensitivity control terminal couple,
The grid of second end and first NMOS tube couples；First filter capacitor, first end and first filter resistance
The source electrode of second end coupling, second end and first NMOS tube couples；First NMOS tube, source electrode and ground couple, drain electrode
It is coupled with the first end of first divider resistance；Second input of second divider resistance, first end and the comparator
End coupling, second end input high level；
The second adjustment of sensitivity unit, comprising: the second filter resistance, the second filter capacitor, the second NMOS tube and third
Divider resistance, in which: second filter resistance, first end and the second sensitivity control terminal couple, second end with it is described
The grid of second NMOS tube couples；The second end of second filter capacitor, first end and second filter resistance couples, the
The source electrode of two ends and second NMOS tube couples；Second NMOS tube, source electrode and ground couple, and drain electrode is divided with the third
The first end of resistance couples；
The second end of the third divider resistance and the second end of first divider resistance couple.
4. welding mirror as claimed in claim 3, which is characterized in that the sensitivity adjusting circuit further include:
Third filter resistance and third filter capacitor, in which:
The first end of the third filter resistance, first end and the third divider resistance couples, and second end and ground couple；
The first end of the third filter capacitor, first end and the third divider resistance couples, and second end and ground couple.
5. welding mirror as described in claim 1, which is characterized in that further include:
With the high-voltage power supply circuit of eyeglass darkening circuit coupling, the output voltage of the high-voltage power supply circuit is negative value, and
The absolute value of the output voltage of the high-voltage power supply circuit is greater than the output voltage of the power supply.
6. welding mirror as claimed in claim 5, which is characterized in that the eyeglass darkening circuit, comprising: the 4th divider resistance,
5th divider resistance, third capacitor, third NMOS tube, the first current-limiting resistance, the second current-limiting resistance, third current-limiting resistance, the 4th
Current-limiting resistance, the first triode and the 4th capacitor, in which:
The third NMOS tube, drain electrode are coupled with the eyeglass, and the first end of grid and the 4th divider resistance couples, source electrode
It is coupled with the output end of the high-voltage power supply circuit；
The grid of 4th divider resistance, first end and the third NMOS tube couples, second end and high voltage supply electricity
The output end on road couples；
The output end of 5th divider resistance, first end and the high-voltage power supply circuit couples, second end and third electricity
The second end of appearance couples；
The first end of the third capacitor, first end and the 4th divider resistance couples, second end and the 5th partial pressure electricity
The second end of resistance couples；
The second end of first triode, collector and the 5th divider resistance couples, base stage and third current limliting electricity
The first end of resistance couples, and first end, the first end of second current-limiting circuit of emitter and first current-limiting resistance couple；
First current-limiting resistance, second end input high level；
The base stage of second current-limiting resistance, second end and first triode couples；
The third current-limiting resistance, second end input high level；
The base stage of 4th capacitor, first end and first triode couples, second end and the 4th current-limiting resistance
First end coupling；
First trigger signal test side of the 4th current-limiting resistance, second end and the controller couples.
7. welding mirror as claimed in claim 6, which is characterized in that the eyeglass darkening circuit, further includes:
The second end of 5th capacitor, first end and the third current-limiting resistance couples, and second end and ground couple.
8. welding mirror as described in claim 1, which is characterized in that further include: power control circuit；
The controller is coupled with the power control circuit, suitable for generating driving signal when receiving the second trigger signal
And it exports to the power control circuit；
The power control circuit is coupled between the power supply and the controller, suitable for generating described when being triggered
Two trigger signals, and switch when receiving the driving signal connection status between the power supply and the controller.
9. welding mirror as claimed in claim 8, which is characterized in that the power control circuit, comprising: power switch button,
Diode, the 5th current-limiting resistance, the 6th divider resistance, the 7th divider resistance, the second triode and PMOS tube, in which:
The power switch button is coupled with the cathode of the diode；
The diode, the positive collector with second triode couple, and cathode and the power switch button couple；
Second triode, the first end of emitter and the 6th divider resistance, couple, base stage and the 6th partial pressure
The second end of resistance couples；
The base stage of 7th divider resistance, first end and second triode couples, the electricity of second end and the controller
The coupling of source control terminal；
5th current-limiting resistance, is coupled between the grid and source electrode of the PMOS tube；
The PMOS tube, drain input high level signal, and the first end of grid and the 5th current-limiting resistance couples, drain electrode and institute
State the 5th current-limiting resistance second end and the supply coupling.
10. welding mirror as described in claim 1, which is characterized in that further include: shading adjusts key, with the controller coupling
It connects, be suitable for generating shading adjustment trigger signal and export to the controller；The controller is further adapted for receiving the screening
When light adjusts trigger signal, generates shading adjustment signal corresponding with shading adjustment trigger signal and export to the mirror
Piece；The eyeglass is further adapted for when receiving the shading adjustment signal, adjusts shade number.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821111393.3U CN208910686U (en) | 2018-07-13 | 2018-07-13 | Welding mirror |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821111393.3U CN208910686U (en) | 2018-07-13 | 2018-07-13 | Welding mirror |
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| Publication Number | Publication Date |
|---|---|
| CN208910686U true CN208910686U (en) | 2019-05-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821111393.3U Active CN208910686U (en) | 2018-07-13 | 2018-07-13 | Welding mirror |
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| CN (1) | CN208910686U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108904130A (en) * | 2018-07-13 | 2018-11-30 | 上海东软载波微电子有限公司 | Welding mirror |
-
2018
- 2018-07-13 CN CN201821111393.3U patent/CN208910686U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108904130A (en) * | 2018-07-13 | 2018-11-30 | 上海东软载波微电子有限公司 | Welding mirror |
| CN108904130B (en) * | 2018-07-13 | 2023-12-19 | 上海东软载波微电子有限公司 | Electric welding mirror |
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