CN207992472U - Enter paper detection sensor and device - Google Patents
Enter paper detection sensor and device Download PDFInfo
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- CN207992472U CN207992472U CN201820120065.3U CN201820120065U CN207992472U CN 207992472 U CN207992472 U CN 207992472U CN 201820120065 U CN201820120065 U CN 201820120065U CN 207992472 U CN207992472 U CN 207992472U
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Abstract
The utility model discloses one kind entering paper detection sensor and device, including：First infrared emission/receiving module,Second infrared receiver/transmitting module and control module,First infrared emission/receiving module is respectively arranged at the second infrared receiver/transmitting module on the opposite two side of the paper feed channel of shredder,The width of two side is less than the width of the other two side of paper feed channel,First infrared emission/receiving module and the second infrared receiver/transmitting module are to penetrating infrared light,The output end of first infrared emission/receiving module and the second infrared receiver/transmitting module is connected with the input terminal of control module respectively,When infrared light is blocked by paper,First infrared emission/receiving module enters paper signal to control module input second,Second infrared receiver/transmitting module enters paper signal to control module input first,Control module receives first and enters paper signal and second when entering paper signal simultaneously,Generate shredded paper signal,Realize non-blind area,Highly sensitive paper feed detection.
Description
Technical field
The utility model embodiment is related to electronic technology more particularly to one kind entering paper detection sensor and device.
Background technology
Attention with enterprise to information protection, the operation of enterprise during, more and more confidential information that record
File needs are destroyed, and therefore, the use of shredder is more and more extensive.
Currently, shredder includes upper cover plate, shell, enters paper detection sensor, motor and hand papercutter, upper cover plate and shell
Connection forms the cavity of shredder, enters paper detection sensor, motor and hand papercutter and may be contained in the cavity.Fig. 1 is existing
Enter the position view of paper detection sensor in technology.A paper feed channel 11 is offered on upper cover plate.Entering paper detection sensor can
Think infrared sensor, may include infrared transmission module 12 and infrared receiving module 13.Enter the infrared of paper detection sensor
Transmitting module 12 and infrared receiving module 13 can be respectively arranged at the width of the opposite two side 111 of paper feed channel 11 of shredder
Spend the midpoint in direction.The width of the two side 111 is more than the width of the other two side 112 of paper feed channel.Enter paper detection to pass
The infrared receiving module of sensor is connect with motor, and motor is connect with hand papercutter.When paper enters from paper feed channel the chamber of shredder
When body, paper entrance can have been detected by entering paper detection sensor, to, output shredded paper signal control motor work, motor driving
Hand papercutter acts, to complete shredded paper.
But in current shredder, on the one hand, enter paper detection sensor be set to paper feed channel width it is larger two
On the midpoint of the width direction of side wall, this leads to work as the smaller paper of size from a smaller side-walls of the width of paper feed channel
When region 14 between the midpoint in a side wall length direction larger with width enters paper feed channel 11, enter paper detection sensing
Device cannot achieve detection, i.e., there are check frequencies for the current paper detection sensor that enters, and on the other hand, current enters paper detection sensing
Device sensitivity is relatively low, it may appear that error detection.
Utility model content
The utility model provides one kind and entering paper detection sensor and device, exists with the paper detection sensor that enters for solving current
The technical issues of check frequency and error detection.
In a first aspect, the utility model embodiment, which provides one kind, enters paper detection sensor, it is described enter paper detection sensor
On shredder, it is described enter paper detection sensor include the first infrared emission/receiving module, the second infrared receiver/transmitting
Module and control module；First infrared emission/receiving module is respectively arranged at second infrared receiver/transmitting module
On the opposite two side of the paper feed channel of the shredder, the width of the two side is less than the other both sides of the paper feed channel
The width of wall, first infrared emission/receiving module is with second infrared receiver/transmitting module to penetrating infrared light；It is described
The output end of the output end of first infrared emission/receiving module and second infrared receiver/transmitting module respectively with the control
The input terminal of molding block is connected；
When the infrared light quilt that first infrared emission/receiving module emits to second infrared receiver/transmitting module
When paper blocks, second infrared receiver/transmitting module enters paper signal to control module input first；When described second
When the infrared light that infrared receiver/transmitting module emits to first infrared emission/receiving module is blocked by paper, described first
Infrared emission/receiving module enters paper signal to control module input second；
Enter paper signal and described second if the control module receives described first simultaneously and enter paper signal, generates shredded paper
Signal so that the motor of the shredder drives hand papercutter to run according to the shredded paper signal.
As shown above enters in paper detection sensor, and the control module includes：Sequentially connected first comparator circuit,
Capacitor charge and discharge circuit, the second comparator circuit and display device；
The first comparator circuit is used to enter paper signal and/or described second enter paper signal not receiving described first
When, export logic high, receive described first enter paper signal and described second enter paper signal when, output logic low electricity
It is flat；
The capacitor charge and discharge circuit is used in the first comparator circuit output logic high, to the capacitance
The first capacitance in charge-discharge circuit charges, in the first comparator circuit output logic low, to described
One capacitance discharges；
Second comparator circuit is used in first capacitor charging, logic high is exported, described first
When capacitance discharges, logic low is exported, and export the logic low as shredded paper signal to the electricity of the shredder
Machine；
The display device is used to, when second comparator circuit exports logic low, show and indicate to believe into paper
Number.
As shown above enters in paper detection sensor, and first infrared emission/receiving module includes：First infrared emission
Module and the first infrared receiving module；
First infrared transmission module includes：First current-limiting resistance and the first infrared-emitting diode；First limit
One end of leakage resistance and the anode of power supply connect, the other end of first current-limiting resistance and first infrared-emitting diode
Anode connection, the cathode of first infrared-emitting diode connect with the cathode of the power supply；
First infrared receiving module includes：Second current-limiting resistance, the second capacitance and the first infrared remote receiver；Described
One end of two current-limiting resistances is connect with the anode of the power supply, the other end of second current-limiting resistance and second capacitance
The collector of one end and first infrared remote receiver is all connected with, the other end and the first comparator electricity of second capacitance
The input terminal on road connects, and the emitter of first infrared remote receiver connects the cathode of the power supply；
When first infrared remote receiver does not receive whole infrared lights of second infrared receiver/transmitting module transmitting
When, the other end output described second of second capacitance enters paper signal.
As shown above enters in paper detection sensor, and second infrared receiver/transmitting module includes：Second infrared emission
Module and the second infrared receiving module；
Second infrared transmission module includes：Third current-limiting resistance and the second infrared-emitting diode；The third limit
One end of leakage resistance and the anode of power supply connect, the other end of the third current-limiting resistance and second infrared-emitting diode
Anode connection, the cathode of second infrared-emitting diode connect with the cathode of the power supply；
Second infrared receiving module includes：4th current-limiting resistance, third capacitance and the second infrared remote receiver；Described
One end of four current-limiting resistances is connect with the anode of the power supply, the other end and the third capacitance of the 4th current-limiting resistance
The collector of one end and second infrared remote receiver is all connected with, the other end and the first comparator electricity of the third capacitance
The input terminal on road connects, and the emitter of second infrared remote receiver connects the cathode of the power supply；
When second infrared remote receiver does not receive whole infrared lights of first infrared emission/receiving module transmitting
When, the other end output described first of the third capacitance enters paper signal.
As shown above enters in paper detection sensor, and the first comparator circuit includes：First divider resistance, second point
Piezoresistance, third divider resistance, the 4th divider resistance and first comparator；
One end of first divider resistance connects the anode of the power supply, the other end of first divider resistance and institute
State the inverting input and described second of the other end of the second capacitance, the other end of the third capacitance, the first comparator
One end of divider resistance is all connected with, and the other end of second divider resistance is connect with the cathode of the power supply；
One end of the third divider resistance connects the anode of the power supply, the other end of the third divider resistance and institute
The in-phase input end of one end and the first comparator for stating the 4th divider resistance is all connected with, the 4th divider resistance it is another
End is connect with the cathode of the power supply；Wherein, first divider resistance is identical as the resistance value of the second divider resistance, described
The resistance value of third divider resistance is less than the resistance value of the 4th divider resistance.
As shown above enters in paper detection sensor, and the capacitor charge and discharge circuit includes：Diode, the 5th current limliting electricity
Resistance, the 5th divider resistance and first capacitance；
The cathode of the diode is connect with the output end of the first comparator, the anode of the diode and described the
One end of five current-limiting resistances connects, the other end of the 5th current-limiting resistance and one end of first capacitance and 5th point described
One end of piezoresistance is all connected with, and the other end of first capacitance is connect with the cathode of the power supply, the 5th divider resistance
The anode of the other end and the power supply connect.
As shown above enters in paper detection sensor, and second comparator circuit includes：6th divider resistance, the 7th point
Piezoresistance, pull-up resistor and the second comparator；
The anode of one end of 6th divider resistance and the power supply connect, the other end of the 6th divider resistance and
One end of 7th divider resistance and the inverting input of second comparator are all connected with, the 7th divider resistance it is another
One end is connect with the cathode of the power supply, and the in-phase input end of second comparator and one end of the 5th divider resistance connect
Connect, the output end of second comparator and one end of the motor of the shredder and the pull-up resistor are all connected with, it is described on
The other end of pull-up resistor is connect with the anode of the power supply；Wherein, the resistance value of the 6th divider resistance is less than described 7th point
The resistance value of piezoresistance.
As shown above enters in paper detection sensor, and the display device is light emitting diode；
It is described enter paper detection sensor further include the 6th current-limiting resistance, one end of the 6th current-limiting resistance and the power supply
Anode connection, the other end of the 6th current-limiting resistance connect with the anode of the light emitting diode, the light emitting diode
Cathode connect with the output end of second comparator.
Second aspect, the utility model embodiment additionally provide one kind and entering paper detecting apparatus, including：Upper cover plate, shell, electricity
Machine, hand papercutter and such as first aspect any one of them enter paper detection sensor；
The upper cover plate connect with the shell to be formed it is described enter paper detecting apparatus cavity；It is described enter paper detection sensing
Device, the motor and the hand papercutter may be contained in the cavity；A paper feed channel is offered on the upper cover plate；It is described
Enter paper detection sensor to connect with the motor, the motor is connect with the hand papercutter.
What the utility model embodiment provided enters paper detection sensor and device, includes by being set into paper detection sensor
First infrared emission/receiving module, the second infrared receiver/transmitting module and control module, the first infrared emission/receiving module with
Second infrared receiver/transmitting module is respectively arranged on the opposite two side of paper feed channel of shredder, and the width of two side is small
Width in the other two side of paper feed channel, the first infrared emission/receiving module is with the second infrared receiver/transmitting module to penetrating
The output end of infrared light, the output end of the first infrared emission/receiving module and the second infrared receiver/transmitting module respectively with control
The input terminal of module is connected, when the infrared light quilt that the first infrared emission/receiving module emits to the second infrared receiver/transmitting module
When paper blocks, the second infrared receiver/transmitting module enters paper signal to control module input first, when the second infrared receiver/hair
When penetrating the infrared light that module emits to the first infrared emission/receiving module and being blocked by paper, the first infrared emission/receiving module to
Control module input second enters paper signal, enters paper signal and second if control module receives first simultaneously and enters paper signal, gives birth to
At shredded paper signal so that the motor of shredder drives hand papercutter to run according to shredded paper signal, on the one hand, due to by the first infrared hair
Penetrate/receiving module and the second infrared receiver/transmitting module be respectively arranged in the smaller two lateral walls of width of paper feed channel,
And the two modules expand detection zone, detect with realizing non-blind area, on the other hand, due to control module to penetrating infrared light
Receive first enter paper signal and second enter paper signal when, generate shredded paper signal, compared to only receive one enter paper signal
Mode is realized and is more accurately detected, and improves the sensitivity of detection.Therefore, what the utility model embodiment provided enters paper inspection
Surveying sensor realizes non-blind area, the detection of highly sensitive paper feed.
Description of the drawings
Fig. 1 is the position view for entering paper detection sensor in the prior art；
Fig. 2 is the structural schematic diagram for entering paper detection sensor embodiment one provided in the utility model embodiment；
Fig. 3 is the structural schematic diagram for entering paper detection sensor and being installed on shredder of embodiment illustrated in fig. 2；
Fig. 4 A are a kind of structural schematic diagram of realization method of control module in embodiment illustrated in fig. 2；
Fig. 4 B are the schematic diagram of another realization method of control module in embodiment illustrated in fig. 2；
Fig. 5 is the structural schematic diagram for entering paper detection sensor embodiment two provided in the utility model embodiment.
Specific implementation mode
The utility model is described in further detail with reference to the accompanying drawings and examples.It is understood that herein
Described specific embodiment is used only for explaining the utility model, rather than the restriction to the utility model.It further needs exist for
It is bright, it illustrates only for ease of description, in attached drawing and the relevant part of the utility model rather than entire infrastructure.
Fig. 2 is the structural schematic diagram for entering paper detection sensor embodiment one provided in the utility model embodiment.Fig. 3 is
The structural schematic diagram for entering paper detection sensor and being installed on shredder of embodiment illustrated in fig. 2.
Referring to Fig. 2 and Fig. 3, what the utility model embodiment provided enters paper detection sensor 20 mounted on shredder
On 35.It includes the first infrared emission/receiving module 21,22 and of the second infrared receiver/transmitting module that this, which enters paper detection sensor 20,
Control module 23.
First infrared emission/receiving module 21 and the second infrared receiver/transmitting module 22 be respectively arranged at shredder into
On the opposite two side 25 in paper channel 24.The width of the two side 25 is less than the width of the other two side 26 of paper feed channel 24.
First infrared emission/receiving module 21 and the second infrared receiver/transmitting module 22 are to penetrating infrared light.First infrared hair
Penetrate/output end the input with control module 23 respectively of the output end and the second infrared receiver/transmitting module 22 of receiving module 21
End is connected.
When the infrared light that the first infrared emission/receiving module 21 emits to the second infrared receiver/transmitting module 22 is by paper
When blocking, the second infrared receiver/transmitting module 22 enters paper signal to the input of control module 23 first.When the second infrared receiver/hair
When penetrating the infrared light that module 22 emits to the first infrared emission/receiving module 21 and being blocked by paper, the first infrared emission/reception mould
Block 21 enters paper signal to the input of control module 23 second.
Enter paper signal and second if control module 23 receives first simultaneously and enter paper signal, generates shredded paper signal so that
The motor 27 of shredder drives hand papercutter 28 to run according to shredded paper signal.
Specifically, as shown in Figures 2 and 3, shredder 35 includes upper cover plate 29, shell 30, motor 27 and hand papercutter 28.On
Cover board 29 forms the cavity 33 of shredder 35 with shell.What the utility model embodiment provided enters paper detection sensor 20, motor
27 and hand papercutter 28 may be contained in cavity 33.Enter paper detection sensor 20 to connect with motor 27, motor 27 and hand papercutter 28
Connection.A paper feed channel 24 is offered on the upper cover plate 29 of shredder 35.The paper feed channel 24 has 4 side walls, 4 side walls
There can be a height in vertical direction, there can be a width in the horizontal direction.In this 4 side walls, there are two opposite sides
Wall wide degree is larger, other two opposite sidewall width is smaller, that is, the section of the paper feed channel 24 is rectangle.First is infrared
Transmit/receive module 21 and the second infrared receiver/transmitting module 22 are respectively arranged at smaller two of width of paper feed channel 24
On opposite side wall 25.The first infrared emission of the utility model embodiment pair/receiving module 21 and the second infrared receiver/transmitting mould
Specific installation position of the block 22 on side wall 25 does not limit, for example, the width direction center line of side wall 25 can be respectively arranged at
With the point of intersection of short transverse center line width direction center line and height side can also be set to that is, at the geometric center of side wall 25
To the positions such as the point of intersection of 1/3 dividing line.
First infrared emission/receiving module 21 and the second infrared receiver/transmitting module 22 can form two to penetrating infrared light
Road light path.First infrared emission/receiving module 21 both can emit infrared light to the second infrared receiver/transmitting module 22, also may be used
To receive the infrared light that the second infrared receiver/transmitting module 22 emits；Conversely, the second infrared emission/receiving module 22 both can be with
Emit infrared light to the first infrared receiver/transmitting module 21, the red of the transmitting of the first infrared receiver/transmitting module 21 can also be received
Outer light.When no paper enters paper feed channel 24, which is access；It, should when there is paper to enter paper feed channel 24
Two-way light path is blocked." blocking " in the utility model embodiment refers to that light path is at least partially obscured or all blocks.When
When the two-way light path is blocked, the first infrared emission/receiving module 21 can generate second and enter paper signal, and the second infrared receiver/
Transmitting module 22 can generate first and enter paper signal.
Control module 23 receive first enter paper signal and second enter paper signal after, generate shredded paper signal.The shredded paper is believed
Number input motor 27, after receiving shredded paper signal, driving hand papercutter 28 operates motor 27, carries out shredded paper.It needs to illustrate
It is that control module 23 can be directly connected to motor 27, can also be to be indirectly connected with.Between control module 23 and motor 27 are
When connecing in succession, control module 23 can be connect by motor control module with motor 27.To control in the utility model embodiment
The installation position of module 23 is not limited.For example, it can be set on the longer any side wall of width 26, can also be set to
(more specifically, can be with the second infrared receiver/sending module 22 or the first infrared hair on the smaller any side wall 25 of width
Penetrate/receiving module 21 is encapsulated in same position), the other positions of upper cover plate 29 can also be set to.
Control module 23 in the utility model embodiment has following two realization methods：
Fig. 4 A are a kind of structural schematic diagram of realization method of control module in embodiment illustrated in fig. 2.Fig. 4 B are shown in Fig. 2
The schematic diagram of another realization method of control module in embodiment.
The first realization method, as shown in Figure 4 A, control module 23 includes：Sequentially connected first comparator circuit 231,
Capacitor charge and discharge circuit 232 and the second comparator circuit 233.That is, the output end of first comparator circuit 231 and capacitance charge and discharge
The input terminal of circuit 232 connects, and the input terminal of the output end of capacitor charge and discharge circuit 232 and the second comparator circuit 233 connects
It connects.The output end of second comparator circuit 233 and the motor of shredder connect.
Wherein, first comparator circuit 231 be used for do not receive first enter paper signal and/or second enter paper signal when,
Export logic high.Wherein, first is not received to enter paper signal and/or second enter paper signal and refer to that receiving only first enters
Paper signal, alternatively, receiving only second enters paper signal, alternatively, first enters paper signal and enter paper signal with second and be not received by.
Receive first enter paper signal and second enter paper signal when, export logic low.Capacitor charge and discharge circuit 232 is used for the
It when one comparator circuit 231 exports logic high, charges to the first capacitance in capacitor charge and discharge circuit 232, the
When one comparator circuit 231 exports logic low, discharge the first capacitance.Second comparator circuit 233 is used for the
When one capacitor charging, logic high is exported, when the first capacitance discharge, output logic low, and by the logic low
It is exported to the motor of shredder as shredded paper signal.
Second of realization method in the realization method, on the basis of Fig. 4 A, increases as shown in Figure 4 B in control module 23
Display device 234 is added.Display device 234 is connect with the output end of the second comparator circuit 233.Display device 234 is used for
When second comparator circuit 233 exports logic low, show into paper indication signal.
Display device 234 can be light emitting diode, be indicated into paper at this point, being shown in a manner of lighting the light emitting diode
Signal.Display device 234 can also be display screen, at this point, in the pre-set symbol of display screen display or word
Mode is shown into paper indication signal.Display device 234 can also be 7 segment numeral pipes, at this point, being set in advance with being shown on charactron
The mode of the symbol or number set is shown into paper indication signal.It is shown into paper indication signal by display device, it can be in real time
It informs user's testing result, improves the user experience that user uses shredder.
The utility model embodiment provide the course of work for entering paper detection sensor 20 be：When the first infrared emission/connect
When the two-way light path that receipts module 21 and the second infrared receiver/transmitting module 22 are formed is not blocked by paper, the first infrared emission/
Receiving module 21 will not generate second and enter paper signal, and the second infrared receiver/transmitting module 22 will not generate first and enter paper signal, into
And control module 23 can not generate shredded paper signal, shredder will not carry out shredded paper operation.When the first infrared emission/receiving module
21 and the two-way light path that is formed of the second infrared receiver/transmitting module 22 when entirely or partly being blocked by paper, the first infrared hair
Penetrate/receiving module 21 generates and second enters paper signal, and enter paper signal input control module 23 by second；Second infrared receiver/hair
It penetrates the generation of module 22 first and enters paper signal, and enter paper signal input control module 23 by first.In turn, control module 23 is receiving
To first enter paper signal and second enter paper signal after, generate shredded paper signal so that the motor 27 of shredder according to shredded paper signal drive
Dynamic hand papercutter 28 is run, to carry out shredded paper.
The paper detection sensor 20 that enters that the utility model embodiment provides is installed on after shredder 35, which is
Hand papercutter 28 can be driven to run according to the shredded paper signal control motor 27 for entering the output of paper detection sensor 20, to carry out shredded paper,
It realizes whether automatic sensing paper enters shredder, only after paper enters shredder, just carries out shredded paper.
It should be noted that on the one hand, the paper detection sensor 20 that enters that the utility model embodiment provides is set to paper feed
On the shorter opposite two side of the width in channel, and two light paths to penetrating are formd, then region 34 is what it can be detected
All areas.As can be seen that region 34 is the whole region of paper feed channel 24, compared to the feelings there are check frequency in Fig. 1
Condition, the paper detection sensor that enters that the utility model is implemented to provide do not have check frequency.On the other hand, control module 23 connects at the same time
It receives first and enters paper signal and second when entering paper signal, generate shredded paper signal.Compared at present only all the way light path, only generate one
It is a enter paper signal mode, in the utility model embodiment, enter paper signal and second due to generating first and enter paper signal two
Enter paper signal, the reaction of control module 23 can be sensitiveer.As an example it is assumed that enter paper signal for voltage signal, and control module
When receiving the voltage signal of 1.5V, shredded paper signal could be generated.It is shown in FIG. 1 enter paper detection sensor in, have paper entrance
Paper feed channel, if the paper signal that enters generated is 1V, this enters paper signal due to too faint, can not trigger control module generate it is broken
The case where can not carrying out shredded paper, that is, there is error detection although paper can be caused to enter paper feed channel in paper signal；
In the utility model embodiment, there is paper to enter paper feed channel, if generate first enters paper signal for 1V, second enters paper signal
Also be 1V, then control module 23 receive simultaneously first enter paper signal and second enter the voltage signal of the total 2V of paper signal after, can be with
Generate shredded paper signal, that is, realization more accurately detects, and improves the sensitivity of detection.
What the utility model embodiment provided enters paper detection sensor, includes first red by being set into paper detection sensor
Outer transmit/receive module, the second infrared receiver/transmitting module and control module, the first infrared emission/receiving module and second red
External transmit/receive is penetrated module and is respectively arranged on the opposite two side of paper feed channel of shredder, and the width of two side is less than paper feed
The width of the other two side in channel, the first infrared emission/receiving module are infrared to penetrating with the second infrared receiver/transmitting module
The output end of light, the output end of the first infrared emission/receiving module and the second infrared receiver/transmitting module respectively with control module
Input terminal be connected, when the infrared light that the first infrared emission/receiving module emits to the second infrared receiver/transmitting module is by paper
When blocking, the second infrared receiver/transmitting module enters paper signal to control module input first, when the second infrared receiver/transmitting mould
When the infrared light that block emits to the first infrared emission/receiving module is blocked by paper, the first infrared emission/receiving module is to control
Module input second enters paper signal, enters paper signal and second if control module receives first simultaneously and enters paper signal, generates broken
Paper signal so that the motor of shredder according to shredded paper signal drive hand papercutter run, on the one hand, due to by the first infrared emission/
Receiving module and the second infrared receiver/transmitting module are respectively arranged in the smaller two lateral walls of width of paper feed channel, and
The two modules expand detection zone, detect with realizing non-blind area, on the other hand, since control module exists to penetrating infrared light
It receives first and enters paper signal and second when entering paper signal, generate shredded paper signal, compared to only receiving a side for entering paper signal
Formula is realized and is more accurately detected, and improves the sensitivity of detection.Therefore, what the utility model embodiment provided enters paper detection
Sensor realizes non-blind area, the detection of highly sensitive paper feed.
Fig. 5 is the structural schematic diagram for entering paper detection sensor embodiment two provided in the utility model embodiment.This reality
On the basis of new embodiment embodiment shown in Fig. 2, to the first infrared emission/receiving module, the second infrared receiver/transmitting
The concrete structure of module and control module is made one and is described in detail.Control module in the utility model embodiment has display
Part.As shown in figure 5, the utility model embodiment offer enters in paper detection sensor, the concrete composition of modules and work
Process description is as follows：
First infrared emission/receiving module may include：First infrared transmission module 211 and the first infrared receiving module
212。
First infrared transmission module 211 may include：First current-limiting resistance R1 and the first infrared-emitting diode IR1.The
One end of one current-limiting resistance R1 is connect with the anode of power supply VCC, the other end of the first current-limiting resistance R1 and the first infrared emission two
The anode of pole pipe IR1 connects, and the cathode of two pole device IR1 of the first infrared emission is connect with the cathode of power supply VCC.
First infrared receiving module 212 may include：Second current-limiting resistance R2, the second capacitance C2 and the first infrared remote receiver
PT1.One end of second current-limiting resistance R2 is connect with the anode of power supply VCC, the other end and the second capacitance of the second current-limiting resistance R2
The collector of one end of C2 and the first infrared remote receiver PT1 are all connected with, the other end and the first comparator circuit of the second capacitance C2
231 input terminal connection, the cathode of the emitter connection power supply VCC of the first infrared remote receiver PT1.
When the first infrared remote receiver PT1 does not receive whole infrared lights of the second infrared receiver/transmitting module transmitting, the
The other end output second of two capacitance C2 enters paper signal.That is, when the first infrared remote receiver PT1 does not receive infrared light or can only
When receiving portion infrared light, i.e. light path are blocked in whole or in part, the other end output second of the second capacitance C2 enters paper signal.
Second infrared receiver/transmitting module may include：Second infrared transmission module 222 and the second infrared receiving module
221。
Second infrared transmission module 222 may include：Third current-limiting resistance R3 and the second infrared-emitting diode IR2.The
One end of three current-limiting resistance R3 is connect with the anode of power supply VCC, the other end of third current-limiting resistance R3 and the second infrared emission two
The anode of pole pipe IR2 connects, and the cathode of the second infrared-emitting diode IR2 is connect with the cathode of power supply VCC.
Second infrared receiving module 221 may include：4th current-limiting resistance R4, third capacitance C3 and the second infrared remote receiver
PT2.One end of 4th current-limiting resistance R4 is connect with the anode of power supply VCC, the other end and the third capacitance of the 4th current-limiting resistance R4
The collector of one end of C3 and the second infrared remote receiver PT2 are all connected with, the other end and the first comparator circuit of third capacitance C3
231 input terminal connection, the cathode of the emitter connection power supply of the second infrared remote receiver PT2.
When the second infrared remote receiver PT2 does not receive whole infrared lights of the first infrared emission/receiving module transmitting, the
The other end output first of three capacitance C3 enters paper signal.That is, when the second infrared remote receiver PT2 does not receive infrared light or can only
When receiving portion infrared light, i.e. light path are blocked in whole or in part, the other end output first of third capacitance C3 enters paper signal.
First comparator circuit 231 may include：First divider resistance R5, the second divider resistance R6, third divider resistance
R7, the 4th divider resistance R8 and first comparator IC1A.
The anode of one end connection power supply VCC of first divider resistance R5, the other end of the first divider resistance R5 and the second electricity
Hold the other end of C2, the other end of third capacitance C3, the inverting input of first comparator IC1A and the second divider resistance R6
One end is all connected with, and the other end of the second divider resistance R6 is connect with the cathode of power supply VCC.As shown in figure 5, by the first divider resistance
The other end of R5 is labeled as Sign, the other end of the second capacitance C2 is also labeled as Sign, by the other end of third capacitance C3
Labeled as Sign, these ports for being marked as Sign link together.
The anode of one end connection power supply VCC of third divider resistance R7, the other end of third divider resistance R7 and the 4th point
One end of piezoresistance R8 and the in-phase input end of first comparator IC1A are all connected with, the other end and power supply of the 4th divider resistance R8
The cathode of VCC connects.Wherein, the first divider resistance R5 is identical as the resistance value of the second divider resistance R6, third divider resistance R7's
Resistance value is less than the resistance value of the 4th divider resistance R8.
Capacitor charge and discharge circuit 232 may include：Diode D1, the 5th current-limiting resistance R9, the 5th divider resistance R10 and
One capacitance C1.
The cathode of diode D1 is connect with the output end of first comparator IC1A, the anode of diode D1 and the 5th current limliting electricity
Hinder one end connection of R9.The one of one end and the 5th divider resistance R10 of the other end of 5th current-limiting resistance R9 and the first capacitance C1
End is all connected with, and the other end of the first capacitance C1 is connect with the cathode of power supply VCC, the other end and power supply of the 5th divider resistance R10
Anode connection.
Second comparator circuit 233 may include：6th divider resistance R11, the 7th divider resistance R12, pull-up resistor R13
And the second comparator IC1B.
The anode of one end of 6th divider resistance R11 and power supply VCC are connect, the other end of the 6th divider resistance R11 and the
The inverting input of one end of seven divider resistance R12 and the second comparator IC1B are all connected with, the other end of the 7th divider resistance R12
It being connect with the cathode of power supply VCC, the in-phase input end of the second comparator IC1B is connect with one end of the 5th divider resistance R10, the
The output end of two comparator IC1B and one end of the motor 27 of shredder and pull-up resistor R13 are all connected with, and pull-up resistor R13's is another
One end is connect with the anode of power supply VCC.Wherein, the resistance value of the 6th divider resistance R11 is less than the resistance value of the 7th divider resistance R12.
Display device is light emitting diode D2.It further includes the 6th current-limiting resistance R14, the 6th current limliting electricity to enter paper detection sensor
The one end for hindering R14 is connect with the anode of power supply VCC, and the other end of the 6th current-limiting resistance R14 connects with the anode of light emitting diode D2
It connects, the cathode of light emitting diode D2 is connect with the output end of the second comparator.
Optionally, in the utility model embodiment, the voltage of power supply VCC can be 5V.First current-limiting resistance R1, third limit
The resistance value of leakage resistance R3 and the 6th current-limiting resistance R14 are 47 ohm.The resistance of second current-limiting resistance R2 and the 4th current-limiting resistance R4
Value is 4.7 × 104Ohm.The resistance value of 5th current-limiting resistance R9 is 1000 ohm.The capacitance of first capacitance C1 is 1 microfarad.
The capacitance of second capacitance C2 and third capacitance C3 is 0.1 microfarad.The resistance value of first divider resistance R5 and the second divider resistance R6
It is 106Ohm.The resistance value of third divider resistance R7 is 5.1 × 105Ohm.The resistance value of 4th divider resistance R8 is 5.3 × 105Europe
Nurse.The resistance value of 5th divider resistance R10 is 106Ohm.The resistance value of 6th divider resistance R11 is 5.6 × 104Ohm.7th partial pressure
The resistance value of resistance R12 is 105Ohm.The resistance value of pull-up resistor R13 is 2 × 104Ohm.
When VCC is 5V, what logic low that the first comparator circuit 231 in the utility model embodiment exports referred to
It is the voltage signal that voltage is less than or equal to 0.4V, logic high refers to that voltage is greater than or equal to the voltage signal of 4.0V.
The logic low of second comparator circuit 233 output refers to that voltage is less than or equal to the voltage signal of 0.4V, logically high electricity
The flat voltage signal for referring to voltage and being greater than or equal to 4.5V.
In addition, in the utility model embodiment, first comparator IC1A and the second comparator IC1B are all connected with power supply VCC.
The paper detection sensor that enters in the utility model embodiment further includes power filtering capacitor C4, one end of the filter capacitor and power supply
The anode connection of VCC, the other end connect with the cathode of power supply VCC, realize and filtered to power supply VCC.In the utility model embodiment,
The model of first comparator IC1A and the second comparator IC1B are specifically as follows LM393.
First comparator IC1A and the second comparator IC1B in the utility model embodiment include 3 ends：Homophase input
End, inverting input and output end.When the voltage for inputting in-phase input end is more than the voltage of input inversion input terminal, output end
Export logic high；When the voltage for inputting in-phase input end is less than the voltage of input inversion input terminal, output end output is patrolled
Collect low level.
The first infrared emission/receiving module, the second infrared receiver/transmitting module in the utility model embodiment and control
The specific work process of module is as follows：
1, the scene entered without paper, i.e., in static scene：
The first infrared-emitting diode IR1 in first infrared transmission module 211 is into the second infrared receiving module 221
The infrared light of second infrared remote receiver PT2 transmittings is access, the second infrared-emitting diode in the second infrared transmission module 222
The infrared light of first infrared remote receiver PT1 transmittings of the IR2 into the first infrared receiving module 212 is access.First infrared receiver
It is direct current in module 212 and the second infrared receiving module 221.The second capacitance C2 in first infrared receiving module 212 and
Third capacitance C3 in two infrared receiving modules 221 is equivalent to open circuit.
Since the first divider resistance R5 is equal with the resistance value of the second divider resistance R6, then first comparator IC1A's at this time is anti-
The voltage of phase input terminal is VCC/2；Since the resistance value of third divider resistance R7 is less than the resistance value of the 4th divider resistance R8, then at this time
The voltage of the in-phase input end of first comparator IC1A is more than VCC/2.That is, the voltage of the in-phase input end of first comparator IC1A
More than the voltage of inverting input, the output end of first comparator IC1A exports logic high.
Diode D1 is in cut-off state.First capacitance C1 is in charged state.
After the first capacitance C1 completes charging, the voltage of the in-phase input end of the second comparator IC1B is approximately VCC；Due to
The resistance value of 6th divider resistance R11 is less than the resistance value of the 7th divider resistance R12, then the inverting input of the second comparator IC1B
Voltage is more than VCC/2, is less than VCC.That is, the voltage of the in-phase input end of the second comparator IC1B is more than the electricity of inverting input
The output end of pressure, the second comparator IC1B exports logic high, is unable to the action of driving motor 27.Light emitting diode D2, which is in, to be cut
Only state.
2, paper enters in the scene of paper feed channel：
The first infrared-emitting diode IR1 in first infrared transmission module 211 is into the second infrared receiving module 221
The infrared light of second infrared remote receiver PT2 transmitting is blocked by paper portions or all, and the in the second infrared transmission module 222
The infrared light of first infrared remote receiver PT1 transmittings of the two infrared-emitting diode IR2 into the first infrared receiving module 212 is by paper
Open some or all of block.First infrared remote receiver PT1 and the second infrared remote receiver PT2 when receiving Infrared irradiation,
Resistance is relatively low, and the pressure drop on PT1 and PT2 is relatively low, when not receiving or being only capable of receiving portion Infrared irradiation, resistance compared with
Greatly, the pressure drop on PT1 and PT2 is larger.According to this characteristic of the first infrared remote receiver PT1 and the second infrared remote receiver PT2,
In one infrared receiving module 212 and the second infrared receiving module 221, the both ends of the second current-limiting resistance R2 and the 4th current-limiting resistance R4
Voltage can change, the voltage for being equivalent to the second capacitance C2 and the both ends third capacitance C3 changes, voltage at this moment letter
Number can approximation regard alternating current as, then the second capacitance C2 and third capacitance C3 conductings.Second capacitance C2 and the first divider resistance R5
One end of connection exports first voltage signal, one end output second voltage letter that third capacitance C3 is connect with the first divider resistance R5
Number, which is equivalent to second and enters paper signal, which is equivalent to first and enters paper signal.
Since the pressure drop on PT1 and PT2 at this time is larger, at this point, the voltage of the inverting input of first comparator IC1A is
The pressure drop of the pressure drop+PT2 of VCC/2+PT1, the voltage of the in-phase input end higher than first comparator IC1A.That is, first compares
The voltage of the in-phase input end of device IC1A is less than the voltage of inverting input, and the output end of first comparator IC1A exports logic low
Level.
Diode D1 is in the conduction state.First capacitance C1 starts to discharge.
After first capacitance C1 electric discharges, the voltage approximation 0V of the in-phase input end of the second comparator IC1B, second compares
The voltage of the inverting input of device IC1B is more than VCC/2.That is, the voltage of the in-phase input end of the second comparator IC1B is less than reverse phase
The output end of the voltage of input terminal, the second comparator IC1B exports logic low.The logic low driving motor 27 acts,
To drive hand papercutter to carry out shredded paper.At this point, light emitting diode D2 is in illuminating state, to remind user to detect paper entrance.
3, from there is paper into the scene for being restored to no paper entrance：
After the completion of shredded paper, paper feed channel is restored to the state that no paper enters.First in first infrared transmission module 211
The infrared light of second infrared remote receiver PT2 transmittings of the infrared-emitting diode IR1 into the second infrared receiving module 221 reverts to
Access, the second infrared-emitting diode IR2 in the second infrared transmission module 222 into the first infrared receiving module 212
The infrared light of one infrared remote receiver PT1 transmittings reverts to access.Second capacitance C2 and third capacitance C3 are equivalent to open circuit.
The voltage of the in-phase input end of first comparator IC1A is more than the voltage of inverting input, first comparator at this time
The output end of IC1A reverts to output logic high.
Diode D1 is in cut-off state.First capacitance C1 restores charged state.
After the first capacitance C1 completes charging, the voltage of the in-phase input end of the second comparator IC1B is more than inverting input
Voltage, the output end of the second comparator IC1B restores output logic high, is unable to the action of driving motor 27, and hand papercutter stops
Shredded paper.Light emitting diode D2 is in cut-off state, no longer shows into paper indication signal.
What the utility model embodiment provided enters paper detection sensor, by limiting the first infrared emission/receiving module, the
The concrete structure of two infrared receivers/transmitting module and control module realizes the sensitivity for improving detection, also, due to control
It is provided with two comparator circuits and charge-discharge circuit in molding block, improves the reliability of detection.
Another embodiment of the utility model additionally provides one kind and entering paper detecting apparatus.It can be shredded paper that this, which enters paper detecting apparatus,
Machine.It includes：Upper cover plate, shell, motor, hand papercutter and as Fig. 2-Fig. 5 any embodiments provided enter paper detection sensing
Device.Upper cover plate connect the cavity to be formed into paper detecting apparatus with shell；Enter paper detection sensor, motor and hand papercutter to be respectively provided with
In cavity；A paper feed channel is offered on upper cover plate；Enter paper detection sensor to connect with motor, motor is connect with hand papercutter.
The course of work for entering paper detecting apparatus is similar with the course of work of the shredder provided in embodiment illustrated in fig. 2,
And technique effect having the same, details are not described herein again.
Note that above are only the preferred embodiment and institute's application technology principle of the utility model.Those skilled in the art's meeting
Understand, the utility model is not limited to specific embodiment described here, can carry out for a person skilled in the art various bright
Aobvious variation is readjusted and is substituted without departing from the scope of protection of the utility model.Therefore, although passing through above example
The utility model is described in further detail, but the utility model is not limited only to above example, is not departing from
Can also include other more equivalent embodiments in the case that the utility model is conceived, and the scope of the utility model is by appended
Right determine.
Claims (10)
1. one kind enters paper detection sensor, it is described enter paper detection sensor be mounted on shredder, which is characterized in that it is described enter paper
Detection sensor includes the first infrared emission/receiving module, the second infrared receiver/transmitting module and control module；Described first
Infrared emission/receiving module is respectively arranged at the paper feed channel phase of the shredder with second infrared receiver/transmitting module
To two side on, the width of the two side is less than the width of the other two side of the paper feed channel, and described first is infrared
Transmit/receive module is with second infrared receiver/transmitting module to penetrating infrared light；First infrared emission/receiving module
Output end and the output end of second infrared receiver/transmitting module be connected respectively with the input terminal of the control module；
When the infrared light that first infrared emission/receiving module emits to second infrared receiver/transmitting module is by paper
When blocking, second infrared receiver/transmitting module enters paper signal to control module input first；When described second infrared
When the infrared light that reception/transmitting module emits to first infrared emission/receiving module is blocked by paper, described first is infrared
Transmit/receive module enters paper signal to control module input second；
Enter paper signal and described second if the control module receives described first simultaneously and enter paper signal, generates shredded paper letter
Number so that the motor of the shredder drives hand papercutter to run according to the shredded paper signal.
2. it is according to claim 1 enter paper detection sensor, which is characterized in that the control module includes：It is sequentially connected
First comparator circuit, capacitor charge and discharge circuit, the second comparator circuit and display device；
The first comparator circuit be used for do not receive described first enter paper signal and/or described second enter paper signal when,
Export logic high, receive described first enter paper signal and described second enter paper signal when, export logic low；
The capacitor charge and discharge circuit is used in the first comparator circuit output logic high, to the capacitance charge and discharge
The first capacitance in circuit charges, in the first comparator circuit output logic low, to first electricity
Appearance is discharged；
Second comparator circuit is used in first capacitor charging, logic high is exported, in first capacitance
When electric discharge, logic low is exported, and export the logic low as shredded paper signal to the motor of the shredder；
The display device is used to, when second comparator circuit exports logic low, show into paper indication signal.
3. it is according to claim 2 enter paper detection sensor, which is characterized in that first infrared emission/receiving module
Including：First infrared transmission module and the first infrared receiving module；
First infrared transmission module includes：First current-limiting resistance and the first infrared-emitting diode；The first current limliting electricity
One end of resistance and the anode of power supply connect, the sun of the other end of first current-limiting resistance and first infrared-emitting diode
Pole connects, and the cathode of first infrared-emitting diode is connect with the cathode of the power supply；
First infrared receiving module includes：Second current-limiting resistance, the second capacitance and the first infrared remote receiver；Second limit
One end of leakage resistance is connect with the anode of the power supply, one end of the other end of second current-limiting resistance and second capacitance
And the collector of first infrared remote receiver is all connected with, the other end of second capacitance and the first comparator circuit
Input terminal connects, and the emitter of first infrared remote receiver connects the cathode of the power supply；
When first infrared remote receiver does not receive whole infrared lights of second infrared receiver/transmitting module transmitting,
The other end output described second of second capacitance enters paper signal.
4. it is according to claim 3 enter paper detection sensor, which is characterized in that second infrared receiver/transmitting module
Including：Second infrared transmission module and the second infrared receiving module；
Second infrared transmission module includes：Third current-limiting resistance and the second infrared-emitting diode；The third current limliting electricity
One end of resistance is connect with the anode of the power supply, the other end of the third current-limiting resistance and second infrared-emitting diode
Anode connection, the cathode of second infrared-emitting diode connect with the cathode of the power supply；
Second infrared receiving module includes：4th current-limiting resistance, third capacitance and the second infrared remote receiver；4th limit
One end of leakage resistance is connect with the anode of the power supply, one end of the other end and the third capacitance of the 4th current-limiting resistance
And the collector of second infrared remote receiver is all connected with, the other end of the third capacitance and the first comparator circuit
Input terminal connects, and the emitter of second infrared remote receiver connects the cathode of the power supply；
When second infrared remote receiver does not receive whole infrared lights of first infrared emission/receiving module transmitting,
The other end output described first of the third capacitance enters paper signal.
5. it is according to claim 4 enter paper detection sensor, which is characterized in that the first comparator circuit includes：The
One divider resistance, the second divider resistance, third divider resistance, the 4th divider resistance and first comparator；
One end of first divider resistance connects the anode of the power supply, the other end of first divider resistance and described the
The other end of two capacitances, the other end of the third capacitance, the inverting input of the first comparator and second partial pressure
One end of resistance is all connected with, and the other end of second divider resistance is connect with the cathode of the power supply；
One end of the third divider resistance connects the anode of the power supply, the other end of the third divider resistance and described the
The in-phase input end of one end of four divider resistances and the first comparator is all connected with, the other end of the 4th divider resistance with
The cathode of the power supply connects；Wherein, first divider resistance is identical as the resistance value of the second divider resistance, the third
The resistance value of divider resistance is less than the resistance value of the 4th divider resistance.
6. it is according to claim 5 enter paper detection sensor, which is characterized in that the capacitor charge and discharge circuit includes：Two
Pole pipe, the 5th current-limiting resistance, the 5th divider resistance and first capacitance；
The cathode of the diode is connect with the output end of the first comparator, and the anode of the diode is limited with the described 5th
One end of leakage resistance connects, the other end of the 5th current-limiting resistance and one end of first capacitance and the 5th partial pressure electricity
One end of resistance is all connected with, and the other end of first capacitance is connect with the cathode of the power supply, the 5th divider resistance it is another
One end is connect with the anode of the power supply.
7. it is according to claim 6 enter paper detection sensor, which is characterized in that second comparator circuit includes：The
Six divider resistances, the 7th divider resistance, pull-up resistor and the second comparator；
The anode of one end of 6th divider resistance and the power supply is connect, the other end of the 6th divider resistance with it is described
The inverting input of one end of 7th divider resistance and second comparator is all connected with, the other end of the 7th divider resistance
It being connect with the cathode of the power supply, the in-phase input end of second comparator is connect with one end of the 5th divider resistance,
The output end of second comparator and one end of the motor of the shredder and the pull-up resistor are all connected with, the pull-up electricity
The other end of resistance is connect with the anode of the power supply；Wherein, the resistance value of the 6th divider resistance is less than the 7th partial pressure electricity
The resistance value of resistance.
8. it is according to claim 7 enter paper detection sensor, which is characterized in that the display device be light emitting diode；
It is described enter paper detection sensor further include the 6th current-limiting resistance, one end of the 6th current-limiting resistance with the power supply just
Pole connects, and the other end of the 6th current-limiting resistance is connect with the anode of the light emitting diode, the moon of the light emitting diode
Pole is connect with the output end of second comparator.
9. it is according to claim 8 enter paper detection sensor, which is characterized in that
The resistance value of first current-limiting resistance, the third current-limiting resistance and the 6th current-limiting resistance is 47 ohm；
The resistance value of second current-limiting resistance and the 4th current-limiting resistance is 4.7 × 104Ohm；
The resistance value of 5th current-limiting resistance is 1000 ohm；
The capacitance of first capacitance is 1 microfarad；
The capacitance of second capacitance and the third capacitance is 0.1 microfarad；
The resistance value of first divider resistance and second divider resistance is 106Ohm；
The resistance value of the third divider resistance is 5.1 × 105Ohm；
The resistance value of 4th divider resistance is 5.3 × 105Ohm；
The resistance value of 5th divider resistance is 106Ohm；
The resistance value of 6th divider resistance is 5.6 × 104Ohm；
The resistance value of 7th divider resistance is 105Ohm；
The resistance value of the pull-up resistor is 2 × 104Ohm.
10. one kind entering paper detecting apparatus, which is characterized in that including：Upper cover plate, shell, motor, hand papercutter and such as claim
1-9 any one of them enters paper detection sensor；
The upper cover plate connect with the shell to be formed it is described enter paper detecting apparatus cavity；It is described enter paper detection sensor, institute
It states motor and the hand papercutter may be contained in the cavity；A paper feed channel is offered on the upper cover plate；It is described enter paper
Detection sensor is connect with the motor, and the motor is connect with the hand papercutter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820120065.3U CN207992472U (en) | 2018-01-24 | 2018-01-24 | Enter paper detection sensor and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820120065.3U CN207992472U (en) | 2018-01-24 | 2018-01-24 | Enter paper detection sensor and device |
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| CN207992472U true CN207992472U (en) | 2018-10-19 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108121016A (en) * | 2018-01-24 | 2018-06-05 | 深圳市信威电子有限公司 | Enter paper detection sensor and device |
| CN117492013A (en) * | 2023-12-22 | 2024-02-02 | 荣耀终端有限公司 | In-place detection device and electronic equipment |
-
2018
- 2018-01-24 CN CN201820120065.3U patent/CN207992472U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108121016A (en) * | 2018-01-24 | 2018-06-05 | 深圳市信威电子有限公司 | Enter paper detection sensor and device |
| CN117492013A (en) * | 2023-12-22 | 2024-02-02 | 荣耀终端有限公司 | In-place detection device and electronic equipment |
| CN117492013B (en) * | 2023-12-22 | 2024-05-24 | 荣耀终端有限公司 | In-place detection device and electronic equipment |
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