Battery-free remote controller

Abstract

The utility model relates to a battery-free remote controller which comprises a super capacitor E, a radio frequency coding chip U1, a radio frequency amplification circuit and a plurality of function keys Ki, when the radio frequency coding chip U1 detects that any function key Ki is pressed down, a radio frequency signal carrying a remote control command is generated, the radio frequency signal is amplified by the radio frequency amplification circuit and then transmitted out, and the super capacitor E supplies power to the radio frequency coding chip U1 and the radio frequency amplification circuit; when the super capacitor E supplies power to the radio frequency coding chip U1 and the radio frequency amplification circuit, the radio frequency amplification circuit further comprises a power supply control circuit, and the power supply control circuit supplies power to the radio frequency coding chip U1 and the radio frequency amplification circuit only when any function key Ki is pressed down. Due to the fact that the power supply control circuit is arranged, only when the function keys are connected, the super capacitor supplies power, normal capacitor discharging can be prevented, and the power supply duration of the super capacitor is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of remote controller, especially a batteryless remote controller powered by super capacitor. BACKGROUND

[0002] As a convenient household appliance control tool, remote controller has penetrated into all aspects of modern life. It not only simplifies our operation process of various household appliances, but also greatly improves the convenience and comfort of life.

[0003] At present, whether the key on the car as a remote switch or the remote controller for controlling various electric appliances, the basic principle is to encode the command corresponding to the pressed key by a coding chip and then send it out by the radio frequency sending circuit. Whether it is a radio frequency sending circuit or a coding chip, it needs a power supply circuit to supply power for it. At present, most remote controllers use battery power supply, including lithium battery and dry battery. The television remote controller used at home generally uses lithium battery, and the car remote controller (car key) often uses lithium battery power supply. However, whether it is dry battery or lithium battery, these secondary batteries have a certain service life. If the waste battery reaches the service life and is not recycled, it will pollute the soil. Therefore, some remote controllers no longer use battery power supply and use super capacitor as energy storage power supply. When using super capacitor power supply, due to the limited energy storage of capacitor, many remote controllers, especially car keys or other switch remote controllers, need to be charged frequently, which affects the user experience. SUMMARY

[0004] The utility model provides a batteryless remote controller, which is powered by super capacitor and has a control switch. The super capacitor only supplies power when the key is pressed, reducing the power supply time of the super capacitor.

[0005] The technical scheme of the utility model is as follows: a batteryless remote controller, comprising a super capacitor E, a radio frequency coding chip U1, a radio frequency amplification circuit and a plurality of function keys Ki; when any function key Ki is pressed, the radio frequency coding chip U1 detects and generates a radio frequency signal carrying a remote control command, which is amplified by the radio frequency amplification circuit and then transmitted; the super capacitor E supplies power to the radio frequency coding chip U1 and the radio frequency amplification circuit; when the super capacitor E supplies power to the radio frequency coding chip U1 and the radio frequency amplification circuit, a power control circuit is further included, which only supplies power to the radio frequency coding chip U1 and the radio frequency amplification circuit when any function key Ki is pressed.

[0006] Further, the battery-free remote controller, wherein: each function button Ki comprises a button switch closed when the button is pressed; the power control circuit comprises an NPN transistor Q1, the anode BB of the super capacitor E is connected to the emitter of the transistor Q1, a resistor R2 is arranged between the emitter and the base of the transistor Q1, the emitter of the transistor Q1 forms a working power supply VCC connected to the power supply end of the radio frequency coding chip U1 and the radio frequency amplification circuit; the base of the transistor Q1 is also connected to one end of the button switch of each function button Ki, and the other end of the button switch is connected to the ground through a resistor.

[0007] Further, the battery-free remote controller, wherein: the delay power supply circuit further comprises a control signal generated by the radio frequency coding chip U1, so that the super capacitor continues to supply power when the designated function button Ki is released.

[0008] Further, the battery-free remote controller, wherein: the delay power supply circuit comprises a PNP transistor Q4; the collector of the transistor Q4 is connected to the base of the transistor Q1 through a current limiting resistor R1, the emitter is connected to the ground, and the base is connected to a pin generating a control signal by the radio frequency coding chip U1.

[0009] Further, the battery-free remote controller, wherein: the super capacitor charging circuit for charging the super capacitor is further included; the super capacitor charging circuit comprises a charging control chip U2.

[0010] Further, the battery-free remote controller, wherein: the super capacitor charging circuit uses a TYPE-C interface RP1 to charge a DC power adapter, the charging control chip U2 uses a charging control chip of TP4054 type; a charging indicator light is further included; the 3rd, 4th, 13th and 14th pins of the TYPE-C interface RP1 are short-circuited and connected to the input end of the charging control chip U2, and the output end of the charging control chip U2 is connected to the anode of the super capacitor E.

[0011] Further, the battery-free remote controller, wherein: the radio frequency amplification circuit comprises a transistor Q2, an inductor L2, an inductor L5, a capacitor C2, a capacitor C8 and a capacitor C9.

[0012] The radio frequency signal output by the radio frequency coding chip U1 is connected to the base of the transistor Q2 after passing through a current limiting resistor R9 and being output by a crystal oscillator Y1; the collector of the transistor Q2 is connected to the power supply VCC after being connected in series with the inductor L2 to form an output end; the capacitor C2 is connected in parallel across the inductor L2; the capacitor C8 and the capacitor C9 are connected in series and connected between the collector of the transistor Q2 and the ground; the emitter of the transistor Q2 is connected to the ground through the inductor L.

[0013] Further, the batteryless remote controller, wherein: the collector of the triode Q2 is connected to the power supply VCC and passes through a low-pass filter, the low-pass filter comprising an inductor L1 of 2.2uH and a capacitor C1 of 104P; and the capacitor C1 is grounded at one end of the inductor L1.

[0014] Further, the batteryless remote controller, wherein: the batteryless remote controller further comprises an output filter network; and the output filter network comprises an inductor L3 of 4.7NF and an inductor L4, a capacitor C4 of 15P, and a capacitor C3 and a capacitor C5.

[0015] The capacitor C4 is connected to one end of the inductor L3 and the inductor L4, respectively, the other end of the inductor L3 is connected to the output end of the radio frequency amplification circuit, and the other end of the inductor L4 is connected to the antenna E2; the common end of the capacitor C4 connected to the inductor L3 and the inductor L4 is connected to the ground through the capacitor C3 and the capacitor C5, respectively.

[0016] In the utility model, the power control circuit is arranged, the super capacitor supplies power only when the function button is connected, the capacitor discharge in ordinary times can be prevented, and the super capacitor power supply duration is increased.

[0017] The utility model will be described in detail below in combination with the drawings and specific embodiments. DRAWINGS

[0018] Figure 1 It is power supply principle diagram for the batteryless remote controller of the utility model embodiment 1;

[0019] Figure 2 It is super capacitor charging circuit principle diagram for the batteryless remote controller of the utility model embodiment 1;

[0020] Figure 3 It is radio frequency amplification circuit principle diagram for the batteryless remote controller of the utility model embodiment 1. CONCRETE EMBODIMENT

[0021] The utility model is a kind of batteryless remote controller using super capacitor power supply, especially a kind of remote controller with less function button, such as car key, such as Figure 1As shown, in the embodiment, there are four function keys K1, K2, K3, K4, which can define different commands through the radio frequency coding chip U1 in practice. When the function key Ki (i is a natural number) is pressed, it is 1, 2, 3, 4 on the car key with four function keys, for example. Different in practice according to the number of keys. In the embodiment, the remote controller includes a super capacitor E, a radio frequency coding chip U1, a radio frequency amplification circuit, and a plurality of function keys Ki; when any function key Ki is pressed, the radio frequency coding chip U1 detects the radio frequency signal carrying the remote control command, which is amplified by the radio frequency amplification circuit and then transmitted, the super capacitor E powers the radio frequency coding chip U1 and the radio frequency amplification circuit; when the super capacitor E powers the radio frequency coding chip U1 and the radio frequency amplification circuit, a power control circuit is further included, and the power control circuit only powers the radio frequency coding chip U1 and the radio frequency amplification circuit when any function key Ki is pressed.

[0022] In practice, the power control circuit is a switch arranged between the super capacitor and the power supply output terminal VCC, which is controlled by the function key. When a certain function key Ki is pressed, the switch is closed, and the super capacitor powers the radio frequency coding chip U1 and the radio frequency amplification circuit. When the function key Ki is released, the switch is opened, and the super capacitor E no longer supplies power. Such control circuits are many, such as a mechanical switch synchronized with the function key Ki.

[0023] In the embodiment, each function key Ki includes a key switch that is closed when the key is pressed; the power control circuit is as follows Figure 1 As shown: the power control circuit includes an NPN transistor Q1, the anode BB of the super capacitor E is connected to the emitter of the transistor Q1, a resistor R2 is arranged between the emitter and the base of the transistor Q1, and the emitter of the transistor Q1 forms a working power supply VCC connected to the power supply terminal of the radio frequency coding chip U1 and the radio frequency amplification circuit; one end of the key switch of each function key Ki is also connected to the base of the transistor Q1, and the other end of the key switch is connected to the ground through a resistor. A resistor R2 is also arranged between the base and the emitter of the transistor Q1; in the embodiment, the resistor R1 and the resistor R2 are ordinary resistors of 4.7K on the market, and the NPN transistor Q1 uses a transistor of M6 on the market.

[0024] In the embodiment, a delay power supply circuit is further included, as follows Figure 1The delay power supply circuit generates a control signal by the radio frequency coding chip U1, and when the specified function button Ki is released, the super capacitor continues to supply power. The delay power supply circuit includes a PNP transistor Q4; the collector of the transistor Q4 is connected to the base of the transistor Q1 through the current limiting resistor R1, the emitter is connected to the ground, and the base is connected to the pin of the radio frequency coding chip U1 which generates a control signal. In fact, the radio frequency coding chip U1 is the core of the remote controller, at present, the chip generally uses MCU and memory together, and is realized by software, so that when a certain function button is pressed and then released, how long the power supply needs to be delayed, and how long the power supply signal needs to be output can be set in the software, which can also be set by other means.

[0025] In the embodiment, when the super capacitor runs out of power, the super capacitor can also be charged through the charging circuit, so the embodiment also includes a super capacitor charging circuit for charging the super capacitor; the super capacitor charging circuit is as shown in Figure 2 It includes a charging control chip U2. The super capacitor charging circuit charges by connecting the TYPE-C interface RP1 to the DC power adapter, and the charging control chip U2 uses a charging control chip of TP4054 type; it also includes a charging indicator light; the 3rd, 4th, 13th and 14th pins of the TYPE-C interface RP1 are short-circuited and connected to the input end of the charging control chip U2, and the output end of the charging control chip U2 is connected to the anode of the super capacitor E.

[0026] In the embodiment, the radio frequency amplification circuit is as shown in Figure 3 It includes a transistor Q2, an inductor L2, an inductor L5, a capacitor C2, a capacitor C8 and a capacitor C9; the radio frequency signal output by the radio frequency coding chip U1 is connected to the base of the transistor Q2 after passing through the current limiting resistor R9 and then being output by the crystal oscillator Y1; the collector of the transistor Q2 is connected to the power supply VCC in series with the inductor L2 to form an output end; the capacitor C2 is connected in parallel at both ends of the inductor L2; the capacitor C8 and the capacitor C9 are connected in series between the collector of the transistor Q2 and the ground; the emitter of the transistor Q2 is connected to the ground through the inductor L. When the collector of the transistor Q2 is connected to the power supply VCC, it also passes through a low-pass filter, and the low-pass filter includes an inductor L1 of 2.2uH and a capacitor C1 of 104P; the capacitor C1 is connected to the ground at one end of the inductor L1.

[0027] The embodiment further comprises an output filter network; the output filter network comprises an inductor L3 and an inductor L4 with a 4.7 NF, a capacitor C4 with a 15 P, and a capacitor C3 and a capacitor C5; the capacitor C4 is connected to one end of the inductor L3 and one end of the inductor L4 respectively, the other end of the inductor L3 is connected to the output end of the radio frequency amplification circuit, and the other end of the inductor L4 is connected to an antenna E2; the common end of the capacitor C4 connected to the inductor L3 and the inductor L4 is connected to the ground through the capacitor C3 and the capacitor C5 respectively.

Claims

1. A battery-free remote controller, comprising a super capacitor E, a radio frequency coding chip U1, a radio frequency amplification circuit and a plurality of function buttons Ki; when any function button Ki is pressed, the radio frequency coding chip U1 generates a radio frequency signal carrying a remote control command, which is amplified by the radio frequency amplification circuit and then transmitted; the super capacitor E supplies power to the radio frequency coding chip U1 and the radio frequency amplification circuit; characterized in that: When the super capacitor E supplies power to the radio frequency coding chip U1 and the radio frequency amplification circuit, a power control circuit is further included, which only supplies power to the radio frequency coding chip U1 and the radio frequency amplification circuit when any functional button Ki is pressed.

2. The battery-less remote control of claim 1, wherein: Each functional button Ki includes a button switch that is closed when the button is pressed; the power control circuit includes an NPN transistor Q1, the anode BB of the super capacitor E is connected to the emitter of the transistor Q1, a resistor R2 is arranged between the emitter and the base of the transistor Q1, the emitter of the transistor Q1 forms a working power supply VCC and is connected to the power supply end of the radio frequency coding chip U1 and the radio frequency amplification circuit respectively; the base of the transistor Q1 is further connected to one end of the button switch of each functional button Ki, and the other end of the button switch is connected to the ground through a resistor.

3. The battery-less remote control of claim 2, wherein: A delay power supply circuit is further included, which generates a control signal by the radio frequency coding chip U1, and makes the super capacitor continue to supply power when the designated functional button Ki is released.

4. The battery-less remote control of claim 3, wherein: The delay power supply circuit includes a PNP transistor Q4; the collector of the transistor Q4 is connected to the base of the transistor Q1 through a current limiting resistor R1, the emitter is connected to the ground, and the base is connected to the pin that generates the control signal by the radio frequency coding chip U1.

5. The battery-less remote control of any one of claims 1 to 4, wherein: A super capacitor charging circuit for charging the super capacitor is further included; the super capacitor charging circuit includes a charging control chip U2.

6. The battery-less remote control of claim 5, wherein: The super capacitor charging circuit uses a TYPE-C interface RP1 to connect to a DC power adapter for charging, the charging control chip U2 uses a charging control chip of TP4054 type; a charging indicator lamp is further included; the 3rd, 4th, 13th and 14th pins of the TYPE-C interface RP1 are short-circuited and then connected to the input end of the charging control chip U2, and the output end of the charging control chip U2 is connected to the anode of the super capacitor E.

7. The battery-less remote control of any one of claims 1 to 4, wherein: The radio frequency amplification circuit includes a transistor Q2, an inductor L2, an inductor L5, a capacitor C2, a capacitor C8 and a capacitor C9. The radio frequency signal output by the radio frequency coding chip U1 is connected to the base of the transistor Q2 after passing through a current limiting resistor R9 and then being output by a crystal oscillator Y1; the collector of the transistor Q2 is connected to the power supply VCC after being connected in series with the inductor L2 to form an output end; the capacitor C2 is connected in parallel across the inductor L2; the capacitor C8 and the capacitor C9 are connected in series and then connected between the collector of the transistor Q2 and the ground; the emitter of the transistor Q2 is connected to the ground through the inductor L.

8. The battery-less remote control of claim 7, wherein: When the collector of the transistor Q2 is connected to the power supply VCC, it also passes through a low-pass filter, which includes an inductor L1 of 2.2uH and a capacitor C1 of 104P; the capacitor C1 is connected to the ground at one end of the inductor L1.

9. The battery-less remote control of claim 7, wherein: An output filter network is further included; the output filter network includes an inductor L3 and an inductor L4 of 4.7NF, a capacitor C4 of 15P, and a capacitor C3 and a capacitor C5. The capacitor C4 is connected across the inductor L3 and the inductor L4 respectively at one end, the other end of the inductor L3 is connected to the output end of the radio frequency amplification circuit, and the other end of the inductor L4 is connected to the antenna E2; the common end of the capacitor C4 connected to the inductor L3 and the inductor L4 is connected to the ground through the capacitor C3 and the capacitor C5 respectively.

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