CN211630157U - Touch power switch suitable for small-sized battery power supply electronic equipment - Google Patents
Touch power switch suitable for small-sized battery power supply electronic equipment Download PDFInfo
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- CN211630157U CN211630157U CN201922271598.9U CN201922271598U CN211630157U CN 211630157 U CN211630157 U CN 211630157U CN 201922271598 U CN201922271598 U CN 201922271598U CN 211630157 U CN211630157 U CN 211630157U
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Abstract
The utility model relates to the technical field of switch, especially, relate to a touch switch suitable for small-size battery powered electronic equipment, including power supply battery BT1, two D triggers U1A, voltage converter U2 and touch switch S1, power supply battery BT1 'S VCC is connected with voltage converter U2' S pin 1, touch switch S1 'S one end is connected with two D triggers U1A' S pin 3, touch switch S1 'S the other end is connected with electric capacity C3, and electric capacity C3 is connected with voltage converter U2' S pin 8, and this touch switch possesses the power free switch and the characteristics that the complete machine does not have almost when shutting down, is applicable to the battery powered electronic equipment of various loads in power consumptive 5V, 500 mA.
Description
Technical Field
The utility model relates to the field of switch technology, especially, relate to a touch switch suitable for small-size battery powered electronic equipment.
Background
In many electronic devices using batteries, a mechanical power switch, such as a multimeter commonly used by us, is used to prolong the service life of the batteries. However, for some electronic devices using batteries, the use of mechanical power switches is limited for various reasons, which requires a non-mechanical power switch, such as a touch power switch.
The touch power switch is used, so that the touch power switch has the characteristics that the power switch is free and the whole power supply is almost free of power consumption when the touch power switch is turned off in order to meet the use requirement. In order to solve the problems, a touch power switch suitable for a small-sized battery-powered electronic device is designed.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a touch switch suitable for small-size battery powered electronic equipment to solve above-mentioned technical problem.
The utility model discloses a solve above-mentioned technical problem, adopt following technical scheme to realize:
a touch power switch suitable for a small-sized battery-powered electronic device comprises a power supply battery BT1, a double-D trigger U1A, a voltage converter U2 and a touch switch S1, wherein VCC of the power supply battery BT1 is connected with a pin 1 of a voltage converter U2, one end of the touch switch S1 is connected with a pin 3 of the double-D trigger U1A, the other end of the touch switch S1 is connected with a capacitor C3, and the capacitor C3 is connected with a pin 8 of the voltage converter U2;
a line between the capacitor C3 and the touch switch S1 is connected with a capacitor C1, a resistor R2, a pin 6 of a double-D trigger U1A and pins 5, 6 and 7 of a voltage converter U2, a capacitor C1 is connected with a line between the touch switch S1 and a pin 3 of the double-D trigger U1A, a resistor R2 is connected with a line between VCC of a power supply battery BT1 and a pin 1 of the voltage converter U2 through the capacitor C2, and a line between VCC of the power supply battery BT1 and the pin 1 of the voltage converter U2 and a line between the touch switch S1 and the pin 3 of the double-D trigger U1A are connected with a resistor R1;
Preferably, the power supply battery BT1 is a 7.2V lithium battery, and the voltage converter U2 is 5V and 500 mA.
Preferably, the S1 touch switch is a membrane touch switch.
Preferably, the power supply battery BT1 is one of 6V-11.5V batteries.
The utility model has the advantages that:
the touch power switch has the characteristics of free power switch and almost no power consumption of the whole machine when the power switch is turned off, and is suitable for various battery-powered electronic equipment with loads within 5V and 500 mA.
Drawings
Fig. 1 is a schematic diagram of the circuit structure of the present invention;
Detailed Description
In order to make the technical means, the creation features, the achievement purposes and the functions of the present invention easy to understand, the present invention will be further explained below with reference to the following embodiments and the accompanying drawings, but the following embodiments are only the preferred embodiments of the present invention, and not all embodiments are included. Based on the embodiments in the implementation, other embodiments obtained by those skilled in the art without any creative work belong to the protection scope of the present invention.
Specific embodiments of the present invention will be described below with reference to the accompanying drawings.
Example 1
As shown in fig. 1, a touch power switch suitable for a small battery-powered electronic device includes a power supply battery BT1, a dual-D flip-flop U1A, a voltage converter U2 and a touch switch S1, where the touch switch S1 is a membrane touch switch, VCC of the power supply battery BT1 is connected to pin 1 of the voltage converter U2, one end of the touch switch S1 is connected to pin 3 of the dual-D flip-flop U1A, the other end of the touch switch S1 is connected to a capacitor C3, and a capacitor C3 is connected to pin 8 of the voltage converter U2;
a line between a capacitor C3 and the touch switch S1 is connected with a capacitor C1, a resistor R2, a pin 6 of a double-D trigger U1A and pins 5, 6 and 7 of a voltage converter U2, a capacitor C1 is connected with a line between the touch switch S1 and a pin 3 of the double-D trigger U1A, a resistor R2 is connected with a line between VCC of a power supply battery BT1 and a pin 1 of the voltage converter U2 through the capacitor C2, and a line between VCC of the power supply battery BT1 and the pin 1 of the voltage converter U2 and a line between the touch switch S1 and the pin 3 of the double-D trigger U1A are connected with a resistor R1;
The power supply battery BT1 is a 7.2V lithium battery, the voltage converter U2 is 5V and 500mA, and the power supply battery BT1 is one of 6V-11.5V batteries.
When the power supply battery BT1 is switched in the circuit, the voltage of the capacitor C2 is 0, so that the Q end of the double-D trigger U1A is low voltage, the voltage converter U2 is closed, the OUT end of the voltage converter U2 has no output, the power supply is in a power-off state, and the capacitors C1 and C2 are fully charged after a plurality of milliseconds; when the touch switch S1 is touched in the power-off state, the capacitor C1 discharges to 0, the resistor R1 charges the voltage on the capacitor C1 to a high level after a plurality of milliseconds, the Q of the double-D trigger U1A changes to a high level, the voltage converter U2 is turned on, a 5V power supply outputs, and the power supply is in the power-on state; when the power-on state touches the touch switch S1, the capacitor C1 discharges to 0 again, the resistor R1 charges the voltage on the capacitor C1 to a high level after several milliseconds, the Q of the dual D flip-flop U1A changes to a low level, the voltage converter U2 is turned off, and the power supply is in a power-off state.
The above process enables free switching of the power supply. In the shutdown state, no output is generated at a pin 8 of the voltage converter U2, so the power consumption of the whole machine mainly comprises self power consumption of the dual-D flip-flop U1a4013, the voltage converter U2 MAX603, the resistors R1 and R2, the capacitors C1 and C2 and the power supply battery BT 1. Since the capacitors C1 and C2 use small-capacity capacitors, the power consumption is almost negligible when the capacitors C1 and C2 are fully charged and in a static state. The self-discharge of the power supply battery BT1 is also present when a mechanical power switch is used, and is not considered. The static power consumption of the dual-D flip-flop U1a4013 under the 7.2V power supply is about 1uA, and the maximum static current of the voltage converter U2 MAX603 under the off state is 2uA, so the maximum power consumption of the touch power switch under the off state is about 3 uA. If the lithium battery with 1Ah is used, the electricity in the lithium battery can be kept for more than 30 years theoretically in the shutdown state, and the requirement that the whole machine consumes almost no electricity when the machine is shut down is completely met.
In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It should be understood by those skilled in the art that the present invention is not limited by the above embodiments, and the description in the above embodiments and the description is only preferred examples of the present invention, and is not intended to limit the present invention, and that the present invention can have various changes and modifications without departing from the spirit and scope of the present invention, and these changes and modifications all fall into the scope of the claimed invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (4)
1. A touch type power switch suitable for a small-sized battery-powered electronic device comprises a power supply battery BT1, a double-D trigger U1A, a voltage converter U2 and a touch switch S1, and is characterized in that: the VCC of the power supply battery BT1 is connected with a pin 1 of a voltage converter U2, one end of the touch switch S1 is connected with a pin 3 of a double-D trigger U1A, the other end of the touch switch S1 is connected with a capacitor C3, and a capacitor C3 is connected with a pin 8 of the voltage converter U2;
a line between the capacitor C3 and the touch switch S1 is connected with a capacitor C1, a resistor R2, a pin 6 of a double-D trigger U1A and pins 5, 6 and 7 of a voltage converter U2, a capacitor C1 is connected with a line between the touch switch S1 and a pin 3 of the double-D trigger U1A, a resistor R2 is connected with a line between VCC of a power supply battery BT1 and a pin 1 of the voltage converter U2 through the capacitor C2, and a line between VCC of the power supply battery BT1 and the pin 1 of the voltage converter U2 and a line between the touch switch S1 and the pin 3 of the double-D trigger U1A are connected with a resistor R1;
pin 2 and pin 4 of the voltage converter U2 are connected with pin 7 and pin 1 of the dual D flip-flop U1A, respectively, a line between pin 2 of the voltage converter U2 and pin 7 of the dual D flip-flop U1A is connected with pin 3 of the voltage converter U2 and with a line between the touch switch S1 and the capacitor C3, pin 5 and pin 2 of the dual D flip-flop U1A are connected, pin 14 of the dual D flip-flop U1A is connected with a line between VCC of the power supply battery BT1 and pin 1 of the voltage converter U2, and pin 4 of the dual D flip-flop U1A is connected with a line between the resistor R2 and the capacitor C2.
2. A touch-sensitive power switch suitable for use in small battery-operated electronic devices as claimed in claim 1, wherein: the power supply battery BT1 is a 7.2V lithium battery, and the voltage converter U2 is 5V and 500 mA.
3. A touch-sensitive power switch suitable for use in small battery-operated electronic devices as claimed in claim 1, wherein: the S1 touch switch is a membrane touch switch.
4. A touch-sensitive power switch suitable for use in small battery-operated electronic devices as claimed in claim 1, wherein: the power supply battery BT1 is one of 6V-11.5V batteries.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922271598.9U CN211630157U (en) | 2019-12-18 | 2019-12-18 | Touch power switch suitable for small-sized battery power supply electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922271598.9U CN211630157U (en) | 2019-12-18 | 2019-12-18 | Touch power switch suitable for small-sized battery power supply electronic equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211630157U true CN211630157U (en) | 2020-10-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922271598.9U Active CN211630157U (en) | 2019-12-18 | 2019-12-18 | Touch power switch suitable for small-sized battery power supply electronic equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211630157U (en) |
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2019
- 2019-12-18 CN CN201922271598.9U patent/CN211630157U/en active Active
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