CN209395446U - A kind of printing device opening a position for paper storehouses of dress protects circuit - Google Patents
A kind of printing device opening a position for paper storehouses of dress protects circuit Download PDFInfo
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- CN209395446U CN209395446U CN201821668436.8U CN201821668436U CN209395446U CN 209395446 U CN209395446 U CN 209395446U CN 201821668436 U CN201821668436 U CN 201821668436U CN 209395446 U CN209395446 U CN 209395446U
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Abstract
The utility model discloses a kind of printing device opening a position for paper storehouses of dress and protects circuit; including the power-off control circuit that opens a position; the input terminal of the power-off control circuit that opens a position is connect with photoelectric sensor; its output end is connect with the first power supply circuit and the second power supply circuit respectively; and the on-off for controlling first power supply circuit and second power supply circuit, the power input of the power-off control circuit that opens a position are connect with the third power supply circuit.The utility model increase opens a position power-off control circuit, and the power supply of printing device can be cut off when filling paper storehouses and opening, and is conducive to the control circuit for avoiding static electricity on human body from damaging printing device and printing device because of the case where leaking electricity and then causing harm to the human body.
Description
Technical field
The utility model relates to protect field of circuit technology, and in particular to a kind of printing device opening a position for paper storehouses of dress protects electricity
Road.
Background technique
The especially widely used heat-sensitive recorder of existing printing device is mostly band dress paper storehouses formula structure, fills paper when opening
When the operation such as heat-sensitive paper is replaced in storehouse, the finger of people may directly contact the thermal head of recorder, exist in this case
Following two security risk: first, because the electrostatic that the reasons such as weather generate human body may be damaged in recorder by finger
The control circuit in portion；Second, if when recorder local environment or power supply gauze exception, the control circuit near thermal head may
There are leaky and then cause harm to the human body.Currently, for both security risks, part heat-sensitive recorder designer couple
Nearby circuit reinforces electrostatic protection to thermal head, although security risk can be reduced to a certain extent, this can not be good
Security protection is carried out to user and recorder.
Summary of the invention
In view of the deficiencies of the prior art, the utility model provides a kind of printing device opening a position for paper storehouses of dress and protects circuit, uses
In modules such as the security protections for improving printing device.
The content of the utility model is as follows:
A kind of printing device opening a position for paper storehouses of dress protects circuit, including the power-off control circuit that opens a position, the power-off control that opens a position
The input terminal of circuit processed is connect with photoelectric sensor, and output end is connect with the first power supply circuit and the second power supply circuit respectively,
And the on-off for controlling first power supply circuit and second power supply circuit, the power supply of the power-off control circuit that opens a position
Input terminal is connect with third power supply circuit.
Preferably, the power-off control circuit that opens a position includes signal driver module and switch control module, the photoelectric transfer
Sensor is connect with the signal driver module, and the signal driver module is by the switch control module respectively with described first
Power supply circuit is connected with second power supply circuit, the third power supply circuit respectively with the signal driver module and described open
Close control module connection.
Preferably, the signal driver module includes schmidt trigger buffer U11, and the switch control module includes three
The second pin of pole pipe Q1 and triode Q2, the schmidt trigger buffer U11 pass through resistance R3 and the detection sensor that opens a position
Connection, it is described open a position detection sensor for detect fill paper storehouses whether open, the third of the schmidt trigger buffer U11 is drawn
Foot ground connection, the 5th pin are connect with the third power supply circuit, and the 4th pin of the schmidt trigger buffer U11 passes through
Resistance R9 is connect with the base stage of triode Q1, and the emitter ground connection of triode Q1, collector passes through resistance R4 and the third
Power supply circuit connection, is also connect by resistance R47 with the base stage of triode Q2, the emitter ground connection of the triode Q2, collection
Electrode is connect by resistance R43 with the third power supply circuit, is also connect with output control terminal ON/OFF, the output control terminal
ON/OFF is connect with first power supply circuit and second power supply circuit respectively.
Preferably, first power supply circuit includes regulator U1, and the of the regulator U1
One pin is connect with first voltage input terminal, and is grounded by filter capacitor C1, and second pin is connect by filter rectifier
Ground, third pin ground connection, the 4th pin are grounded by resistance R2, and the 4th pin is also connected with resistance R1, the other end of resistance R1
It is connected to first voltage output end, protection diode D1 anode and inductance L1, filter is connected between first voltage output end and ground
Wave capacitor C2, protection diode D1 cathode are connect with the first pin of the regulator U1, the other end of inductance L1
It is connect with the second pin of the regulator U1, the 5th pin of the regulator U1 passes through drop-down electricity
R24 ground connection is hindered, is also connect by diode D8 with the power-off control circuit that opens a position, and CPU is connected to by diode D3
Control pin, the cathode of diode D3, D8 connect after being connected with the 5th pin of the regulator U1.
Preferably, second power supply circuit includes the first voltage-stablizer U9, and the first pin of the first voltage-stablizer U9 connects
Ground, second pin are connected to ground by resistance R48, are also connect with the power-off control circuit that opens a position by resistance R7, and described the
The third pin and the 4th pin of one voltage-stablizer U9 is connect by inductance L2 with second voltage input terminal after being connected, also between ground
Access the parallel combination of filter capacitor C35 and C36, the 5th pin and the 6th pin of the first voltage-stablizer U9 be connected after with the
The connection of two voltage output ends, and and it is connected to filter capacitor C37 and filter capacitor C38.
Preferably, the third power supply circuit includes the second voltage-stablizer U3, and the first pin of the second voltage-stablizer U3 connects
Ground, third pin are connect with second voltage input terminal, and and be connected to filter capacitor C9, the second of the second voltage-stablizer U3 is drawn
Foot is connect with the power-off control circuit that opens a position, and and is connected to filter capacitor C10.
The power-off control circuit the utility model has the following beneficial effects: the utility model increase opens a position can be opened in dress paper storehouses
The power supply that printing device is cut off when opening normally has the dress paper storehouses of paper to restore the power supply of printing device when closing again, this
What the control circuit and printing device that sample is conducive to that static electricity on human body is avoided to damage printing device was caused harm to the human body by electric leakage
Situation.
Detailed description of the invention
Fig. 1 show the functional block diagram of the utility model embodiment；
Fig. 2 show the utility model and opens a position the schematic diagram of power-off control circuit；
Fig. 3 show the schematic diagram of the first power supply circuit of the utility model；
Fig. 4 show the schematic diagram of the second power supply circuit of the utility model；
Fig. 5 show the schematic diagram of the utility model third power supply circuit.
Specific embodiment
The above description is merely an outline of the technical solution of the present invention, in order to better understand the skill of the utility model
Art means, and being implemented in accordance with the contents of the specification, and in order to allow the above and other purpose, feature of the utility model
It can be more clearly understood with advantage, it is special below to lift preferred embodiment, and cooperate attached drawing, detailed description are as follows.
Please refer to Fig. 1, a kind of opening a position for paper storehouses of printing device dress disclosed in the present embodiment protects circuit, and especially one kind is answered
Dress paper storehouses for heat-sensitive recorder, which open a position, protects circuit, including the power-off control circuit that opens a position, the power-off control circuit that opens a position
Input terminal connect with photoelectric sensor, output end is connect with the first power supply circuit and the second power supply circuit respectively, and is used for
Control the on-off of first power supply circuit and second power supply circuit, the power input of the power-off control circuit that opens a position
It is connect with third power supply circuit.
Referring to figure 2., the power-off control circuit that opens a position includes signal driver module and switch control module, the signal
Drive module includes the schmidt trigger buffer U11 of model SN74AUP1T17, and the switch control module includes triode
Q1 and triode Q2.The second pin of schmidt trigger buffer U11 is connect by resistance R3 with the detection sensor CO that opens a position, and is opened
Storehouse detection sensor uses photoelectric sensor, and for detecting whether dress paper storehouses open.The 5th of schmidt trigger buffer U11
Pin is connected with tertiary voltage output end VDD_3, and the 4th pin is connect by resistance R9 with the base stage of triode Q1, triode
The emitter of Q1 is grounded, and collector is connected to tertiary voltage output end VDD_3 by resistance R4, also passes through resistance R47 and three
The base stage of pole pipe Q2 connects, and the emitter ground connection of triode Q2, collector passes through resistance R43 and tertiary voltage output end VDD_
3 connections, also connect with output control terminal ON/OFF, and output control terminal ON/OFF is electric with the first power supply circuit and the second power supply respectively
Road connection, while controlling the on-off of the first power supply circuit and the second power supply circuit.
Referring to figure 3., first power supply circuit includes the regulator U1 of model LM2596-ADJ, described
The first pin of regulator U1 is connect with first voltage input terminal VCC_1, and is grounded by filter capacitor C1, described
The second pin of regulator U1 is grounded by filter rectifier, the filter rectifier include diode D2 with
And the RC series circuit in parallel with diode D2, the series circuit include resistance R8 and capacitor C39, diode D2 plus earth.
The third pin of the regulator U1 is grounded, and the 4th pin is grounded by resistance R2, and the 4th pin is also connected with
There is resistance R1, the other end of resistance R1 is connected to first voltage output end VDD_1, protection diode D1 anode and inductance L1, the
Filter capacitor C2, the cathode and regulator of protection diode D1 are connected between one voltage output end VDD_1 and ground
The first pin of U1 connects, and the other end of inductance L1 is connect with the second pin of regulator U1.Switching voltage is adjusted
The 5th pin of device U1 is grounded by pull down resistor R24, is also respectively connected to the cathode of diode D3, D8, diode D3 is just
Pole connect with CPU control pin and (can control the on-off of printing device power supply by CPU when filling paper storehouses normal switching-off),
The anode of diode D8 is connect with the output control terminal ON/OFF for the power-off control circuit that opens a position.
Referring to figure 4., second power supply circuit includes the first voltage-stablizer U9 of model TPS76833, and described first is steady
The first pin of depressor U9 is grounded, and second pin is grounded by resistance R48, also passes through resistance R7 and the power-off control circuit that opens a position
Output control terminal ON/OFF connection, the third pin and the 4th pin of the first voltage-stablizer U9 are electric by inductance L2 and second after being connected
Input terminal VCC_2 connection is pressed, the parallel combination of filter capacitor C35 and C36 is also connected between ground, the first voltage-stablizer U9's
5th pin and the 6th pin are connect after being connected with second voltage output end VDD_2, and are parallel with filter capacitor C37 and C38.
Referring to figure 5., the third power supply circuit includes the second voltage-stablizer U3 of model AMS1117-3.3, and second is steady
The first pin of depressor U3 is grounded, and third pin connects second voltage input terminal and connects VCC_2, and and is connected to filter capacitor
The second pin of C9, the second voltage-stablizer U3 are connect with tertiary voltage output end VDD_3, and and are connected to filter capacitor C10.
The present embodiment increase opens a position power-off control circuit, passes through the same time control of the power-off control circuit that opens a position when filling paper storehouses and opening
Make the first power supply circuit and the second power supply circuit cut off the power output, can to avoid due to environmental abnormality cause thermal head leak electricity into
And human body or the security risk due to the control circuit inside the electrostatic effect damage heat-sensitive recorder of human body are injured, increase heat
The modules such as the security protection of quick recorder.
The above, the only preferred embodiment of the utility model, the utility model are not limited to above-mentioned implementation
Mode, as long as its technical effect for reaching the utility model with identical means, all should belong to the protection scope of the utility model.
Its technical solution and/or embodiment within the protection scope of the present utility model can have a variety of different modifications and variations.
Claims (6)
1. a kind of opening a position for paper storehouses of printing device dress protects circuit, it is characterised in that: described to open including the power-off control circuit that opens a position
The input terminal of storehouse power-off control circuit is connect with photoelectric sensor, and output end is electric with the first power supply circuit and the second power supply respectively
Road connection, and the on-off for controlling first power supply circuit and second power supply circuit, the power-off control electricity that opens a position
The power input on road is connect with third power supply circuit.
2. opening a position for paper storehouses of printing device dress as described in claim 1 protects circuit, it is characterised in that: the power-off control that opens a position
Circuit processed includes signal driver module and switch control module, and the photoelectric sensor is connect with the signal driver module, institute
It states signal driver module and is connected respectively with first power supply circuit and second power supply circuit by the switch control module
It connects, the third power supply circuit is connect with the signal driver module and the switch control module respectively.
3. opening a position for paper storehouses of printing device dress as claimed in claim 2 protects circuit, it is characterised in that: the signal drives mould
Block includes schmidt trigger buffer U11, and the switch control module includes triode Q1 and triode Q2, Schmidt's touching
The second pin of hair buffer U11 is connect by resistance R3 with the detection sensor that opens a position, and the detection sensor that opens a position is for examining
Survey whether dress paper storehouses open, the third pin ground connection of the schmidt trigger buffer U11, the 5th pin and the third supply
4th pin of electric circuit connection, the schmidt trigger buffer U11 is connect by resistance R9 with the base stage of triode Q1, and three
The emitter of pole pipe Q1 is grounded, and collector is connect by resistance R4 with the third power supply circuit, also passes through resistance R47 and three
The base stage of pole pipe Q2 connects, and the emitter ground connection of the triode Q2, collector passes through resistance R43 and third power supply electricity
Road connection, also connect with output control terminal ON/OFF, the output control terminal ON/OFF respectively with first power supply circuit and
The second power supply circuit connection.
4. opening a position for paper storehouses of printing device dress as described in claim 1 protects circuit, it is characterised in that: the first power supply electricity
Road includes regulator U1, and the first pin of the regulator U1 is connect with first voltage input terminal, and
It is grounded by filter capacitor C1, second pin is grounded by filter rectifier, and third pin ground connection, the 4th pin passes through electricity
R2 ground connection is hindered, the 4th pin is also connected with resistance R1, and the other end of resistance R1 is connected to first voltage output end, protection diode
D1 anode and inductance L1, are connected with filter capacitor C2 between first voltage output end and ground, protection diode D1 cathode with it is described
The first pin of regulator U1 connects, the second pin of the other end of inductance L1 and the regulator U1
Connection, the 5th pin of the regulator U1 are grounded by pull down resistor R24, are also opened by diode D8 with described
Storehouse power-off control circuit connects, and the control pin of CPU is connected to by diode D3, and the cathode of diode D3, D8 are connected
It is connect afterwards with the 5th pin of the regulator U1.
5. opening a position for paper storehouses of printing device dress as described in claim 1 protects circuit, it is characterised in that: the second power supply electricity
Road includes that the first pin of the first voltage-stablizer U9, the first voltage-stablizer U9 is grounded, and second pin passes through resistance R48 and ground even
It connects, is also connect by resistance R7 with the power-off control circuit that opens a position, the third pin and the 4th of the first voltage-stablizer U9 draws
Foot is connect by inductance L2 with second voltage input terminal after being connected, and in parallel with C36 group of filter capacitor C35 is accessed also between ground
It closes, the 5th pin and the 6th pin of the first voltage-stablizer U9 is connect after being connected with second voltage output end, and and is connected to filter
Wave capacitor C37 and filter capacitor C38.
6. opening a position for paper storehouses of printing device dress as described in claim 1 protects circuit, it is characterised in that: the third power supply electricity
Road includes that the first pin of the second voltage-stablizer U3, the second voltage-stablizer U3 is grounded, third pin and second voltage input terminal
Connection, and and be connected to filter capacitor C9, the second pin of the second voltage-stablizer U3 is connect with the power-off control circuit that opens a position,
And and it is connected to filter capacitor C10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821668436.8U CN209395446U (en) | 2018-10-15 | 2018-10-15 | A kind of printing device opening a position for paper storehouses of dress protects circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821668436.8U CN209395446U (en) | 2018-10-15 | 2018-10-15 | A kind of printing device opening a position for paper storehouses of dress protects circuit |
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| Publication Number | Publication Date |
|---|---|
| CN209395446U true CN209395446U (en) | 2019-09-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821668436.8U Active CN209395446U (en) | 2018-10-15 | 2018-10-15 | A kind of printing device opening a position for paper storehouses of dress protects circuit |
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| CN (1) | CN209395446U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113263841A (en) * | 2021-05-31 | 2021-08-17 | 上海摩勤智能技术有限公司 | Printing equipment |
-
2018
- 2018-10-15 CN CN201821668436.8U patent/CN209395446U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113263841A (en) * | 2021-05-31 | 2021-08-17 | 上海摩勤智能技术有限公司 | Printing equipment |
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