CN211556963U

CN211556963U - Switchable same-port output control circuit suitable for 3D printing pen with battery

Info

Publication number: CN211556963U
Application number: CN202020361536.7U
Authority: CN
Inventors: 鲍长碧
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-03-20
Filing date: 2020-03-20
Publication date: 2020-09-22
Anticipated expiration: 2030-03-20

Abstract

The utility model discloses a switchable same-port output control circuit suitable for a 3D printing pen with a battery, which comprises a control unit, wherein the control unit is connected with a switching unit, the input end of the switching unit is connected with an adapter and the battery, and the output end of the switching unit is connected with a heating head resistance wire of the 3D printing pen; this output control circuit is with mouthful of switchable formula is through at the adapter, the switching unit is connected to the battery, 3D print pen heating head resistance wire is connected to the output of switching unit, it switches to adapter power supply or battery powered to recycle the control unit control switching unit, can realize that the adapter is direct to 3D print pen heating head resistance wire power supply, automatic disconnection battery gives the heating head power supply when the adapter inserts, change to direct for the heating head power supply and last long-time use and the adapter can give the functional effect that the battery charged simultaneously, this circuit advantage lies in with the minimum this realization function that becomes, and reliable and stable.

Description

Switchable same-port output control circuit suitable for 3D printing pen with battery

Technical Field

The utility model relates to a 3D print pen field, in particular to changeable formula is with mouthful output control circuit suitable for 3D print pen with battery.

Background

At present, the 3D printing pen with the battery on the market supplies power to the heating head through the battery, the adapter only can charge the battery and can not directly supply the heating head when being connected, but the power consumption speed of the battery when supplying power to the heating head is far higher than the speed of the adapter for charging the battery, so even if the adapter is connected to work all the time, the 3D printing pen with the battery on the market finally can exhaust the electricity of the battery even if the adapter continuously works all the time, or the battery of the 3D printing pen is charged firstly, and the battery is used after being charged.

The chinese utility model patent with publication number CN207889131U discloses a 3D printing pen and power supply device, which can be seen from the description of the publication and the drawings attached to the description, the 3D printing pen includes a printing pen body 1, the printing pen body 1 includes a first casing 11, a first electrical interface 12, a printing circuit 13, a first material inlet 141, a first material channel 14 and a printing part 15; the first electrical interface 12 is electrically coupled to the printing circuit 13 and the battery 2, the first material inlet 141 and the printing portion 15 are disposed in the first housing 11, and the first material inlet 141, the first material channel 14 and the printing portion 15 are sequentially communicated; at least when 3D print pen prints print pen body 1 and battery 2 combination as an organic whole, though this print pen is through this mode, not the moment external power supply and can be directly by the work of the direct supply print pen of internal electric energy, the degree of freedom of writing and printing has obtained the improvement, 3D printing apparatus's portability has been strengthened, but battery power supply time is limited, in case the battery power is used up just must charge to the battery, if use print pen meeting this moment, print pen still is by battery powered, be unfavorable for charging for the battery, and also can't use for a long time.

SUMMERY OF THE UTILITY MODEL

The problem of unable long-time use when charging in order to solve the battery of current 3D printing pen, the utility model provides a changeable same mouthful output control circuit who is applicable to 3D printing pen between the two of adapter power supply and battery powered.

In order to realize the above-mentioned purpose, the utility model provides a technical scheme is: the utility model provides a mouthful output control circuit is with changeable formula suitable for 3D print pen with battery, includes the control unit, and the control unit is connected with the switching unit, the input of switching unit is connected with adapter and battery, and the output and the 3D print pen heating head resistance wire of switching unit are connected.

In the above technical solution, as an optimal technical solution, the switching unit includes a first MOS transistor, a drain of the first MOS transistor is connected to the anode of the adapter, a source of the first MOS transistor is connected to the 3D print pen heating head resistance wire, a gate of the first MOS transistor is connected to a drain of the second MOS transistor, a gate of the second MOS transistor is connected to a gate of the third MOS transistor, a drain of the third MOS transistor is connected to the anode of the battery, and a source of the third MOS transistor is connected to the 3D print pen heating head resistance wire.

Furthermore, the grid electrode of the third MOS tube is connected with the drain electrode of the fourth MOS tube, and the grid electrode of the fourth MOS tube is connected with the control unit.

In the above technical solution, the source of the second MOS transistor and the source of the fourth MOS transistor are grounded.

As a preferred technical scheme, the first MOS transistor and the fourth MOS transistor are P-channel MOS transistors, and the second MOS transistor and the third MOS transistor are N-channel MOS transistors.

In the above technical solution, further, the input end of the adapter is connected with a signal detection unit, and the output end of the signal detection unit is connected with the control unit.

Furthermore, the signal detection unit comprises a first resistor and a second resistor which are connected in series, one end of the first resistor is connected with the positive electrode of the adapter, the other end of the first resistor is connected with the control unit, one end of the second resistor is connected with the first resistor, and the other end of the second resistor is grounded.

In addition, a charging unit is connected between the adapter and the battery.

In the above technical solution, the charging unit includes a charging IC, an input terminal of the charging IC is connected to the positive electrode of the adapter, and an output terminal of the charging IC is connected to the positive electrode of the battery.

As a preferred technical scheme, the control unit is a single chip microcomputer.

The utility model discloses beneficial effect for prior art is: this output control circuit is with mouthful of switchable formula is through at the adapter, the switching unit is connected to the battery, 3D print pen heating head resistance wire is connected to the output of switching unit, it switches to adapter power supply or battery powered to recycle the control unit control switching unit, can realize that the adapter is direct to 3D print pen heating head resistance wire power supply, automatic disconnection battery gives the heating head power supply when the adapter inserts, change to direct for the heating head power supply and last long-time use and the adapter can give the functional effect that the battery charged simultaneously, this circuit advantage lies in with the minimum this realization function that becomes, and reliable and stable.

Drawings

Fig. 1 is a frame diagram of the present invention;

FIG. 2 is a circuit diagram of a control unit;

fig. 3 is a circuit diagram of a switching unit;

fig. 4 is a circuit diagram of a signal detection unit;

fig. 5 is a circuit diagram of the charging unit.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

As shown in fig. 1, the present invention provides a switchable same-interface output control circuit suitable for a 3D printing pen with a battery, which mainly includes a control unit 10, a switching unit 20, a signal detection unit 30 and a charging unit 40. The control unit 10 is connected to the switching unit 20, an input end of the switching unit 20 is connected to an adapter and a battery, an output end of the switching unit 20 is connected to a heating head resistance wire of the 3D printing pen, an input end of the adapter is connected to the signal detection unit 30, an output end of the signal detection unit 30 is connected to the control unit 10, and a charging unit 40 is further connected between the adapter and the battery, which will be described in detail with reference to fig. 2 to 5.

As shown in fig. 2, in this embodiment, the control unit 10 is a single chip microcomputer, which may be a commercially available single chip microcomputer model, such as: HR7P series, ES7P series, N76E series of new tang, spacious SN8P series, and tai HT66F series, meaning (ST) STM8S series, STM32 series, etc. of the new tang, the peripheral circuit thereof is the means of the prior art, and therefore it is not repeated in this embodiment, and it should be noted here that, although in this embodiment, the control unit 10 is a single chip microcomputer, the protection scope of the present invention is not limited thereto, and other types of units or modules capable of realizing the control function are also within the protection scope of the present invention, such as embedded processor, PLC, etc.

As shown in fig. 3, the switching unit 20 mainly includes 4 MOS transistors (Q1, Q2, Q3, Q4), wherein the drain of the MOS transistor Q1 is connected to the positive electrode of the adapter, the source of the MOS transistor Q1 is connected to the resistance wire of the heating head of the 3D print pen, the gate of the MOS transistor Q1 is connected to the drain of the MOS transistor Q2, the gate of the MOS transistor Q2 is connected to the gate of the MOS transistor Q3, and the source of the MOS transistor Q2 is grounded; the drain electrode of MOS pipe Q3 is connected with the battery positive pole, and the source electrode of MOS pipe Q3 is connected with 3D print pen heating head resistance wire, and the grid of MOS pipe Q3 is connected with the drain electrode of MOS pipe Q4, and the grid of MOS pipe Q4 is connected with the I/0 mouth of singlechip, and the source electrode of MOS pipe Q4 ground connection.

In this embodiment, the MOS transistors Q1 and Q4 are P-channel MOS transistors, and the MOS transistors Q2 and Q3 are N-channel MOS transistors.

As shown in fig. 4, the signal detection unit is composed of voltage dividing resistors R3 and R4, R3 is connected to the adapter input voltage in an upward pull mode, R4 is connected to the Ground (GND) in a downward pull mode, and the adapter input detection signal divided by R3 and R4 is output to the single chip microcomputer.

As shown in fig. 5, the charging unit is used for charging the battery through the adapter, and specifically comprises a charging IC, a peripheral input filter capacitor C2, an output filter capacitor C3, and a current limiting resistor R5, wherein the "anode of the adapter" is connected to the VIN pin of the charging IC, and the "anode of the battery" is connected to the BAT pin of the charging IC.

The charging IC may be a commercially available model such as: LTC4054, LTC4056, ME4054, ME4056, ME4057, LP4054, LP4056, LP4055, LP4060, LP28055, LP28056S, TC4054, TC4056A, TP4054, TP4055, TP4056, YB4054, YB4056, and so forth.

The working principle of the switchable same-port output control circuit is as follows:

1. when the adapter is not accessed:

the 'adapter input detection signal' is pulled down to low level by resistance R4, the singlechip does not detect the adapter access, the 'switching control signal' output of singlechip is high level, MOS pipe Q4 'S G foot is forward bias to the S foot, MOS pipe Q4 switches on, results in MOS pipe Q3' S G foot to pass through MOS pipe Q4 pull-down, is reverse bias to the S foot, MOS pipe Q3 also switches on to the battery input return circuit switches on. Meanwhile, the pin G of the MOS transistor Q2 is also pulled down through the MOS transistor Q4, the pin G of the MOS transistor Q2 is equal to the pin S in level, the MOS transistor Q2 is cut off, the pin G of the MOS transistor Q1 is pulled up through the resistor R1 and is equal to the pin S in level, the MOS transistor Q1 is cut off, and the input loop of the adapter is disconnected. The output power is provided by the battery.

Because the adapter is not connected, the charging IC does not work at the moment.

2. When the adapter is accessed:

the 'adapter input detection signal' is pulled up to high level by the resistor R3, the singlechip detects the adapter to be connected, the 'switching control signal' output of the singlechip is low level, the G pin of the MOS transistor Q4 is equal to the S pin level, the MOS transistor Q4 is cut off, the G pin of the MOS transistor Q3 is pulled up by the resistor R2 and is equal to the S pin level, the MOS transistor Q3 is also cut off, and therefore the battery input loop is disconnected. Meanwhile, the pin G of the MOS transistor Q2 is also pulled up through the resistor R2, the pin G of the MOS transistor Q2 is forward biased to the pin S, the MOS transistor Q2 is conducted, the pin G of the MOS transistor Q1 is pulled down through the MOS transistor Q2, the pin S is reverse biased, the MOS transistor Q1 is also conducted, and the input loop of the adapter is conducted. The output power is now provided by the adapter.

Meanwhile, the charging IC starts to charge the battery through the BAT pin due to the power supply of the adapter.

Can know through foretell theory of operation the utility model provides a technical scheme can realize the adapter insert with not the time automatic switch-over between adapter power supply and battery powered when inserting to give battery charging when the adapter inserts, with simple discrete component, with minimum this realization automatic disconnection battery when the adapter inserts gives the first power supply that generates heat, change to direct for the first power supply that generates heat of adapter and last long-time use and the adapter can give the functional effect that battery charged simultaneously, with minimum this realization function of formation, and reliable and stable.

The above only is the embodiment of the present invention, not limiting the patent scope of the present invention, all the equivalent structures or equivalent processes that are used in the specification and the attached drawings or directly or indirectly applied to other related technical fields are included in the patent protection scope of the present invention.

Claims

1. The utility model provides a mouthful output control circuit is with switchable formula suitable for 3D printing pen of taking the battery, includes the control unit, its characterized in that: the control unit is connected with a switching unit, the input end of the switching unit is connected with an adapter and a battery, and the output end of the switching unit is connected with the heating head resistance wire of the 3D printing pen.

2. The switchable same-port output control circuit according to claim 1, wherein: the switching unit comprises a first MOS tube, a drain electrode of the first MOS tube is connected with the anode of the adapter, a source electrode of the first MOS tube is connected with the heating head resistance wire of the 3D printing pen, a grid electrode of the first MOS tube is connected with a drain electrode of the second MOS tube, a grid electrode of the second MOS tube is connected with a grid electrode of the third MOS tube, a drain electrode of the third MOS tube is connected with the anode of the battery, and a source electrode of the third MOS tube is connected with the heating head resistance wire of the 3D printing pen.

3. The switchable same-port output control circuit according to claim 2, wherein: and the grid electrode of the third MOS tube is connected with the drain electrode of the fourth MOS tube, and the grid electrode of the fourth MOS tube is connected with the control unit.

4. The switchable same-port output control circuit according to claim 3, wherein: and the source electrode of the second MOS tube and the source electrode of the fourth MOS tube are grounded.

5. The switchable same-port output control circuit according to claim 4, wherein: the first MOS tube and the fourth MOS tube adopt P-channel MOS tubes, and the second MOS tube and the third MOS tube adopt N-channel MOS tubes.

6. The switchable same-port output control circuit according to claim 1, wherein: the input end of the adapter is connected with a signal detection unit, and the output end of the signal detection unit is connected with the control unit.

7. The switchable same-port output control circuit according to claim 6, wherein: the signal detection unit comprises a first resistor and a second resistor which are connected in series, one end of the first resistor is connected with the positive electrode of the adapter, the other end of the first resistor is connected with the control unit, one end of the second resistor is connected with the first resistor, and the other end of the second resistor is grounded.

8. The switchable same-port output control circuit according to claim 1, wherein: and a charging unit is also connected between the adapter and the battery.

9. The switchable same-port output control circuit according to claim 8, wherein: the charging unit comprises a charging IC, the input end of the charging IC is connected with the anode of the adapter, and the output end of the charging IC is connected with the anode of the battery.

10. The switchable same-port output control circuit according to claim 1, wherein: the control unit is a single chip microcomputer.