CN206471805U - A kind of POS printer overtemperature protection system - Google Patents
A kind of POS printer overtemperature protection system Download PDFInfo
- Publication number
- CN206471805U CN206471805U CN201720171338.2U CN201720171338U CN206471805U CN 206471805 U CN206471805 U CN 206471805U CN 201720171338 U CN201720171338 U CN 201720171338U CN 206471805 U CN206471805 U CN 206471805U
- Authority
- CN
- China
- Prior art keywords
- resistance
- circuit
- printer
- output end
- switching tube
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Accessory Devices And Overall Control Thereof (AREA)
Abstract
The utility model belongs to POS machine hardware protection schemes field, more particularly to a kind of POS printer overtemperature protection system, and the output end of power supply and the input of printer, including temperature sampling detection circuit, latching circuit, execution circuit and warning circuit are connect respectively.This POS printer overtemperature protection system is operationally; when temperature is raised in POS; temperature sampling detection circuit is sampled to target temperature, if higher than preset temperature, generating trigger signal; latching circuit is maintained to trigger signal; execution circuit receives trigger signal, and the power supply to printer of cutting off the electricity supply, printer is stopped; it is damaged so as to avoid printer from working in overheat conditions, realizes the protection to printer.
Description
Technical field
The utility model is related to POS machine hardware protection schemes field, specially a kind of POS printer overtemperature protection dress
Put.
Background technology
The use of POS is more and more extensive, wherein, printer is an important component in POS, if damaged,
Depot repair is needed, so as to influence the normal of POS to use.At present, the POS product sold or used, its dozen
Print machine is due to being used for a long time, and temperature is too high, causes to damage, and is the higher major reason of failure rate in POS product, seriously
It has impact on the normal prestige using with manufacturer of POS.
Utility model content
The purpose of this utility model is to provide a kind of POS printer overtemperature protection system, to solve above-mentioned background skill
The problem of being proposed in art.
To achieve the above object, the utility model provides following technical scheme：
A kind of POS printer overtemperature protection system, connects the output end of power supply and the input of printer respectively, its feature
It is：Including temperature sampling detection circuit, latching circuit, execution circuit, warning circuit, power supply and printer；
The temperature sampling detection circuit is used to sample to target temperature, if higher than preset temperature, generation triggering letter
Number, the temperature sampling detection circuit includes thermistor R1, resistance R2, resistance R3, resistance R4, resistance R5, resistance R6, filtering
Electric capacity C1 and comparator chip U；
The thermistor R1 and resistance R2 are connected between power supply and ground, and the resistance R3 and resistance R4 are connected on power supply
Between ground, the electrode input end IN+ of the comparator chip U passes through resistance R5 and thermistor R1 and resistance R2 public company
Connect end to be connected, the negative input IN- of the comparator chip U is connected with resistance R3 and resistance R4 public connecting end, described
Comparator chip U power end Vdd is connected with power output end, and the filter capacitor C1 is connected to comparator chip U power supply
Hold between Vdd and ground, the output end OUT of the comparator chip U is connected with latching circuit, and the resistance R6 is connected to comparator
Between chip U electrode input end IN+ and output end OUT；
The latching circuit is connected with temperature sampling detection circuit, for being maintained to trigger signal, the self-locking electricity
Road includes diode D1, resistance R7, filter capacitor C2 and controllable silicon D2；
The anode of the diode D1 is connected with comparator chip U output end OUT, and diode D1 negative electrode passes through resistance
R7 is connected with controllable silicon D2 controllable end, and the anode of the controllable silicon D2 is connected with power output end, controllable silicon D2 negative electrode point
It is not connected with execution circuit and warning circuit, and controllable silicon D2 negative electrode is the output end of latching circuit, the filter capacitor C2
It is connected between controllable silicon D2 negative electrode and ground；
The execution circuit is connected with latching circuit, power supply and printer respectively, for receiving trigger signal, is cut off the electricity supply
Printer is powered, the execution circuit includes：
Resistance R9, filter capacitor C3, relay K1 and switching tube；
The switch of the relay K1 is single-pole double-throw switch (SPDT), and the first contact a of the single-pole double-throw switch (SPDT) and second is touched
Point b is normally-closed contact and remained closed that the first contact a of the single-pole double-throw switch (SPDT) connects the output end of power supply, and the hilted broadsword is double
Second contact b skies of throw switch connect, and the 3rd contact c of the single-pole double-throw switch (SPDT) connects the input of printer, the filtered electrical
Hold the 3rd contact c of C3 one end order double-pole double throw switches and the common port of printer, other end ground connection, the control of the switching tube
End is connected to the output end of lock circuit, the cold end ground connection of the switching tube, the electromagnet of the relay K1 by resistance R9
It is connected between the output end of power supply and the hot end of switching tube；
The warning circuit is connected with latching circuit, and malfunction is currently at for prompting the user with.
It is preferred that, the switching tube is switching tube using NPN type triode Q1, the NPN type triode Q1 base stage
Control end, the hot end of NPN type triode Q1 current collection extremely switching tube, NPN type triode Q2 transmitting extremely switching tube
Cold end.
It is preferred that, the warning circuit includes alarm lamp and resistance R8, alarm lamp and the resistance R8 are connected on self-locking electricity
Between the output end and ground on road.
Compared with prior art, the beneficial effects of the utility model are：
Operationally, when temperature is raised in POS, temperature sampling detects circuit to this POS printer overtemperature protection system
Target temperature is sampled, if higher than preset temperature, generating trigger signal, latching circuit is maintained to trigger signal, held
Row circuit receives trigger signal, and the power supply to printer of cutting off the electricity supply, printer is stopped, so as to avoid printer in overheat
Work and be damaged under state, realize the protection to printer.
Brief description of the drawings
Fig. 1 is circuit block diagram of the present utility model；
Fig. 2 is fundamental diagram of the present utility model.
In figure：1 temperature sampling detection circuit, 2 latching circuits, 3 execution circuits, 4 warning circuits.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is carried out
Clearly and completely describe, it is clear that described embodiment is only a part of embodiment of the utility model, rather than whole
Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not under the premise of creative work is made
The every other embodiment obtained, belongs to the scope of the utility model protection.
Fig. 1-2 is referred to, the utility model provides a kind of technical scheme：
A kind of POS printer overtemperature protection system, connects the output end of power supply and the input of printer, including temperature respectively
Spend sample detecting circuit 1, latching circuit 2, execution circuit 3, warning circuit 4；
Temperature sampling detection circuit 1 is used to sample to target temperature, if higher than preset temperature, generating trigger signal；
Latching circuit 2 is connected with temperature sampling detection circuit 1, for being maintained to trigger signal；
Execution circuit 3 is connected with latching circuit 2, power supply and electronic equipment respectively, for receiving trigger signal, is cut off the electricity supply
Printer is powered；
Warning circuit 4 is connected with latching circuit 2, and malfunction is currently at for prompting the user with.
Temperature sampling detection circuit 1 includes thermistor R1, resistance R2, resistance R3, resistance R4, resistance R5, resistance R6, filter
Ripple electric capacity C1 and comparator chip U, thermistor R1 and resistance R2 are connected between power supply and ground, resistance R3 and resistance R4 series connection
Between power supply and ground, comparator chip U electrode input end IN+ passes through the public of resistance R5 and thermistor R1 and resistance R2
Connection end is connected, and comparator chip U negative input IN- is connected with resistance R3 and resistance R4 public connecting end, comparator
Chip U power end Vdd is connected with power output end, and filter capacitor C1 is connected to comparator chip U power end Vdd and ground
Between, comparator chip U output end OUT is connected with latching circuit 2, and resistance R6 is connected to comparator chip U electrode input end
Between IN+ and output end OUT.
Latching circuit 2 include diode D1, resistance R7, filter capacitor C2 and controllable silicon D2, diode D1 anode with than
Output end OUT compared with device chip U is connected, and diode D1 negative electrode is connected by resistance R7 with controllable silicon D2 controllable end, controllable
Silicon D2 anode is connected with power output end, and controllable silicon D2 negative electrode is connected with execution circuit 3 and warning circuit 4 respectively, and can
The negative electrode for controlling silicon D2 is the output end of latching circuit 2, and filter capacitor C2 is connected between controllable silicon D2 negative electrode and ground.
Execution circuit 3 includes resistance R9, filter capacitor C3, relay K1 and switching tube, and relay K1 switch is hilted broadsword
Commutator, the first contact a and the second contact b of single-pole double-throw switch (SPDT) are normally-closed contact and remained closed, single-pole double-throw switch (SPDT)
The first contact a connect the output end of power supply, the second contact b skies of single-pole double-throw switch (SPDT) connect, the 3rd contact c of single-pole double-throw switch (SPDT)
The input of printer, the 3rd contact c of filter capacitor C3 one end order double-pole double throw switches and the common port of printer are connect, it is another
End ground connection, the control end of switching tube is connected to the output end of lock circuit 2, the cold end ground connection of switching tube, relay by resistance R9
Device K1 electromagnet is connected between the output end of power supply and the hot end of switching tube.
Switching tube uses NPN type triode Q1, and NPN type triode Q1 base stage is the control end of switching tube, the pole of NPN type three
The hot end of pipe Q1 current collection extremely switching tube, the cold end of NPN type triode Q2 transmitting extremely switching tube.
Warning circuit 4 includes alarm lamp and resistance R8, and alarm lamp and resistance R8 are connected on the output end and ground of latching circuit 2
Between.
Concrete operating principle of the present utility model is：When the temperature rise in POS, thermistor R1 resistance is continuous
Decline, cause comparator chip U electrode input end IN+ sampled voltage also to increase；When comparator chip U positive pole is defeated
Enter to hold IN+ voltages be higher than negative input IN- predeterminated voltage when, comparator chip U output end OUT output high level, open
The base level for closing pipe is pulled low, and triode Q1 is entered off state by conducting and kept, and relay K1 electromagnet coil is returned
Road disconnects, normally-closed contact the first contact a and the second contact b of relay K1 switch closure, normally opened contact the first contact a and the
Three contact c disconnect, and the power supply to printer of cutting off the electricity supply, printer is stopped, so as to avoid printer in overheat conditions
Work is damaged, and reaches the purpose of overtemperature protection, while alarm lamp is luminous, is pointed out malfunction, is improved the usability of POS
Energy and life-span；After power-off, even if POS temperature drop, due to the effect of latching circuit 2, current state will not also change automatically,
It must be re-powered after user fixes a breakdown, printer can just rework, reduce the loss of user.
While there has been shown and described that embodiment of the present utility model, for the ordinary skill in the art,
It is appreciated that these embodiments can be carried out in the case where not departing from principle of the present utility model and spirit a variety of changes, repaiies
Change, replace and modification, scope of the present utility model is defined by the appended claims and the equivalents thereof.
Claims (3)
1. a kind of POS printer overtemperature protection system, connects the output end of power supply and the input of printer respectively, its feature exists
In：Circuit is detected including temperature sampling（1）, latching circuit（2）, execution circuit（3）And warning circuit（4）；
The temperature sampling detects circuit（1）For being sampled to target temperature, if higher than preset temperature, generation triggering letter
Number, the temperature sampling detects circuit（1）Including thermistor R1, resistance R2, resistance R3, resistance R4, resistance R5, resistance R6,
Filter capacitor C1 and comparator chip U；
The thermistor R1 and resistance R2 are connected between power supply and ground, and the resistance R3 and resistance R4 are connected on power supply and ground
Between, the electrode input end IN+ of the comparator chip U passes through resistance R5 and thermistor R1 and resistance R2 public connecting end
It is connected, the negative input IN- of the comparator chip U is connected with resistance R3 and resistance R4 public connecting end, the comparison
Device chip U power end Vdd is connected with power output end, and the filter capacitor C1 is connected to comparator chip U power end Vdd
Between ground, the output end OUT and latching circuit of the comparator chip U（2）Connection, the resistance R6 is connected to comparator core
Between piece U electrode input end IN+ and output end OUT；
The latching circuit（2）Circuit is detected with temperature sampling（1）Connection, for being maintained to trigger signal, the self-locking
Circuit（2）Including diode D1, resistance R7, filter capacitor C2 and controllable silicon D2；
The anode of the diode D1 is connected with comparator chip U output end OUT, diode D1 negative electrode by resistance R7 with
Controllable silicon D2 controllable end is connected, and the anode of the controllable silicon D2 is connected with power output end, controllable silicon D2 negative electrode respectively with
Execution circuit（3）And warning circuit（4）It is connected, and controllable silicon D2 negative electrode is latching circuit（2）Output end, the filtered electrical
Hold C2 to be connected between controllable silicon D2 negative electrode and ground；
The execution circuit（3）Respectively with latching circuit（2）, power supply and printer connection, for receiving trigger signal, cut-out electricity
Source powers to printer, the execution circuit（3）Including：
Resistance R9, filter capacitor C3, relay K1 and switching tube；
The switch of the relay K1 is single-pole double-throw switch (SPDT), and the first contact a and the second contact b of the single-pole double-throw switch (SPDT) are
Normally-closed contact is simultaneously remained closed, and the first contact a of the single-pole double-throw switch (SPDT) connects the output end of power supply, the single-pole double-throw switch (SPDT)
The second contact b skies connect, the 3rd contact c of the single-pole double-throw switch (SPDT) connects the input of printer, the filter capacitor C3 mono-
The 3rd contact c of single-pole double-throw switch (SPDT) and the common port of printer are terminated, other end ground connection, the control end of the switching tube passes through
Resistance R9 is connected to lock circuit（2）Output end, the switching tube cold end ground connection, the relay K1 electromagnet connection
Between the output end of power supply and the hot end of switching tube；
The warning circuit（4）With latching circuit（2）Connection, malfunction is currently at for prompting the user with.
2. a kind of POS printer overtemperature protection system according to claim 1, it is characterised in that：The switching tube is adopted
The base stage for using NPN type triode Q1, the NPN type triode Q1 is the control end of switching tube, NPN type triode Q1 colelctor electrode
For the hot end of switching tube, the cold end of NPN type triode Q2 transmitting extremely switching tube.
3. a kind of POS printer overtemperature protection system according to claim 1, it is characterised in that：The warning circuit
（4）Latching circuit is connected on including alarm lamp and resistance R8, alarm lamp and the resistance R8（2）Output end and ground between.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720171338.2U CN206471805U (en) | 2017-02-24 | 2017-02-24 | A kind of POS printer overtemperature protection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720171338.2U CN206471805U (en) | 2017-02-24 | 2017-02-24 | A kind of POS printer overtemperature protection system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206471805U true CN206471805U (en) | 2017-09-05 |
Family
ID=59707214
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720171338.2U Expired - Fee Related CN206471805U (en) | 2017-02-24 | 2017-02-24 | A kind of POS printer overtemperature protection system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206471805U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107634505A (en) * | 2017-10-10 | 2018-01-26 | 郑州财经学院 | A kind of electronic equipment with protection circuit |
| CN110391641A (en) * | 2019-07-22 | 2019-10-29 | 金陵科技学院 | Overheat protector for motor and motor overheating protect control method |
| CN115005970A (en) * | 2022-08-05 | 2022-09-06 | 深圳北芯医疗科技有限公司 | Method and equipment for identifying abnormality of components of therapeutic apparatus and therapeutic apparatus |
| CN115137447A (en) * | 2022-09-02 | 2022-10-04 | 深圳北芯医疗科技有限公司 | Method and device for protecting components of therapeutic apparatus and therapeutic apparatus |
-
2017
- 2017-02-24 CN CN201720171338.2U patent/CN206471805U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107634505A (en) * | 2017-10-10 | 2018-01-26 | 郑州财经学院 | A kind of electronic equipment with protection circuit |
| CN110391641A (en) * | 2019-07-22 | 2019-10-29 | 金陵科技学院 | Overheat protector for motor and motor overheating protect control method |
| CN110391641B (en) * | 2019-07-22 | 2024-04-09 | 金陵科技学院 | Motor overheat protector and motor overheat protection control method |
| CN115005970A (en) * | 2022-08-05 | 2022-09-06 | 深圳北芯医疗科技有限公司 | Method and equipment for identifying abnormality of components of therapeutic apparatus and therapeutic apparatus |
| CN115137447A (en) * | 2022-09-02 | 2022-10-04 | 深圳北芯医疗科技有限公司 | Method and device for protecting components of therapeutic apparatus and therapeutic apparatus |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN206471805U (en) | A kind of POS printer overtemperature protection system | |
| CN207251180U (en) | A kind of hysteresis thermal-shutdown circuit and electronic equipment | |
| CN204167871U (en) | A kind of Aftercurrent protection circuit breaker | |
| CN107895931A (en) | A kind of no-voltage opens the switch implementation method closed with zero current | |
| CN103779829A (en) | Load protection circuit | |
| CN102931647B (en) | A kind of surge current suppression circuit and light fixture | |
| CN208127862U (en) | No-voltage opens switch, induction controller and the lamps and lanterns closed with zero current | |
| CN203561857U (en) | Low-power standby control system | |
| CN109494120A (en) | Control relay circuit | |
| CN208707379U (en) | A kind of electric energy meter battery powered managing system | |
| CN204626593U (en) | A kind of water outlet anti-scalding protection device of the electronic toilet | |
| CN101763158B (en) | Power supply monitoring and isolation control system for airborne equipment computer | |
| CN105929744A (en) | Power on/off circuit and household electrical appliance | |
| CN106933292B (en) | A kind of sequential control circuit | |
| CN112769004A (en) | Method for eliminating direct current system socket arc and device and application thereof | |
| CN102064549B (en) | AC capacitor operation/cutting method and fling-cut switch circuit | |
| CN205670240U (en) | A kind of on/off circuit and household electrical appliance | |
| CN211144879U (en) | Simple control system for bulb tube fan of CT (computed tomography) machine | |
| CN209787072U (en) | direct current power-on protection controller after external switch self-locking | |
| CN103683215A (en) | Short-circuit protection circuit of electronic switch | |
| CN208738139U (en) | A kind of control relay circuit and relay control device | |
| KR101171739B1 (en) | A switch power source cycle by cycle overvoltage protection circuit | |
| CN206149131U (en) | Controller discharge circuit and controller | |
| CN207021659U (en) | A kind of DC protection circuit | |
| CN105305784A (en) | Surge protection method and circuit, IGBT (Insulated Gate Bipolar Translator) circuit and heater |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170905 Termination date: 20200224 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |