A drying and charging device for a split hearing aid

Abstract

The present invention discloses a split-type drying and charging device for hearing aids, belonging to the field of hearing aid charging. The device comprises a box body, on which a power battery position and a charging battery position are provided. A backup battery is detachably installed in the charging battery position. A circuit board is installed in the box body, and the power battery position charges the backup button battery in the charging battery position through the circuit board. The circuit board is connected to a main control microcontroller, a discharge circuit, and a sampling circuit. The sampling circuit collects the voltage across the charging battery position and transmits it to an interface of the main control microcontroller. The main control microcontroller controls the discharge circuit to discharge through an electronic load to eliminate the memory effect of the backup battery. The present invention has the effect of automatically pre-charging and conditioning deeply depleted batteries and automatically stopping when charging is complete, effectively eliminating the memory effect and extending the battery life.

Description

Technical Field

[0001] The present invention relates to the technical field of hearing aid charging, and in particular to a drying and charging device for a split hearing aid. Background Art

[0002] Hearing aids are devices that help improve hearing. China sees over 1.5 million new hearing aid users annually, and the number globally exceeds 15 million, representing a massive market. Modern hearing aids are becoming increasingly smaller and more miniaturized. Furthermore, as important hearing aids, hearing aids are used frequently and for extended periods of time, requiring batteries to discharge continuously over extended periods of time. To meet volume requirements, hearing aid batteries are typically button cells. To meet these requirements, the battery's capacity is higher, necessitating the addition of a rechargeable battery.

[0003] The following problems exist in the existing technology: improper use of conventional rechargeable batteries such as nickel-cadmium batteries, nickel-metal hydride batteries, lead-acid batteries, etc. will produce varying degrees of memory effect, resulting in problems such as failure to charge or insufficient charging, which shortens the battery life. This problem needs to be solved urgently. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, the purpose of the present invention is to provide a split-type drying and charging device for hearing aids, which can automatically stop when the battery is fully charged, effectively eliminating the memory effect and extending the battery life.

[0005] A dehumidifying and charging device for a split hearing aid includes a box body, wherein a power supply battery slot and a charging battery slot are provided on the box body, a backup battery is detachably installed in the charging battery slot, a circuit board is installed in the box body, and the power supply battery slot charges the backup button battery in the charging battery slot via the circuit board;

[0006] The circuit board is connected to a main control microcontroller, a discharge circuit and a sampling circuit. The sampling circuit collects the voltage across the rechargeable battery and transmits it to an interface of the main control microcontroller. The main control microcontroller controls the discharge circuit to discharge through an electronic load to eliminate the memory effect of the backup battery.

[0007] The present invention is further configured as follows: the main control microcontroller is a STC15W401AS microcontroller, the main control microcontroller is connected to a discharge control circuit, the discharge control circuit includes an optocoupler IC4 and a transistor VT1, and the discharge circuit includes a resistor R20 and a transistor VT3;

[0008] The P3.0 interface of the master microcontroller is connected to the light-emitting diode of the optocoupler IC4, the photosensitive transistor of the optocoupler IC4 is connected to the emitter of the transistor VT1, the collector of the transistor VT1 is connected to the positive electrode of the charging battery, the R20 is connected to the collector of the transistor VT3, the emitter of the transistor VT3 is connected to the negative electrode of the power battery, the base of the transistor VT3 is connected to the resistor R28, and the R28 is connected to the P3.6 interface of the master microcontroller.

[0009] The present invention is further configured as follows: the sampling circuit is connected in parallel with the rechargeable battery, the sampling circuit includes a resistor R21 and a potentiometer RP1, the resistor R21 and the potentiometer RP1 are connected in series, and the middle pin of the potentiometer RP1 is connected to the P1.0 pin of the main control microcontroller.

[0010] The present invention is further configured as follows: a DS2711 chip is connected to the circuit board, a CC1 interface of the DS2711 chip is connected to the base of the transistor VT1, an emitter of the transistor VT1 is connected to the positive electrode of the power battery, a collector of the transistor VT1 is connected to the positive electrode of the charging battery, and a VP1 interface of the DS2711 chip is connected to the positive electrode of the charging battery.

[0011] The present invention is further configured as follows: the box body includes a bottom box, a middle box and an upper cover connected in sequence, the power battery position and the charging battery position are both arranged on the top wall of the middle box, and a drying device is arranged in the bottom box.

[0012] The present invention is further configured as follows: the drying device includes a hanging basket and a desiccant, the desiccant is laid on the bottom wall of the bottom box, the hanging basket is installed in the bottom box and located above the desiccant, and a plurality of air holes are evenly distributed on the bottom wall of the hanging basket.

[0013] The present invention is further configured as follows: an indicator light is installed on the top wall of the middle box, and the indicator light is connected to the LED1 interface of the DS2711 chip.

[0014] The present invention is further configured as follows: the power battery position is detachably connected to a 1.5V alkaline battery, the operating voltage of the main control microcontroller is 5V, the input voltage of the DS2711 chip is 4.0-5.5V, and the power battery position is connected to the main control microcontroller and the DS2711 chip via a boost circuit.

[0015] The present invention is further configured such that the side walls of the middle box close to the top wall and the bottom wall are all threadedly connected to the top cover and the bottom box.

[0016] The present invention is further configured as follows: the number of rechargeable battery positions is two.

[0017] Place the backup battery in the charging battery position. After installing an alkaline battery in the power battery position, the backup battery enters the charging state. The sampling circuit detects the voltage of the charging battery position and transmits it to the main control microcontroller. When the main control microcontroller monitors that the voltage across the charging battery position is greater than 0.9V and less than 1.3V, the discharge circuit is turned on and the discharge control circuit maintains the discharge state of the backup battery, effectively avoiding memory damage caused by overcharging. When the voltage across the charging battery position is less than 0.9V, the discharge control circuit 5 and the discharge circuit are cut off, the transistor VT1 is disconnected from the control of P3.0, the connection between the CC1 port of the DS2711 chip and the transistor VT1 is restored, and the collector of the transistor VT1 resumes the charging state of the charging battery position.

[0018] In summary, the present invention has the following beneficial effects:

[0019] 1. Through the settings of the main control microcontroller, discharge circuit and sampling circuit, the main control microcontroller controls the discharge circuit to discharge through the electronic load to eliminate the memory effect of the backup battery;

[0020] 2. Through the discharge control composed of optocoupler IC4 and transistor VT1, when the voltage across the rechargeable battery is greater than 0.9V and less than 1.3V, the charging state is cut off to maintain the discharge state of the backup battery;

[0021] 3. The charging and drying functions are integrated by connecting the charging and power battery slots to the middle box and the drying device installed in the bottom box, thereby improving portability. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 This is an exploded schematic diagram used to illustrate the structure of each part of the present invention;

[0024] Figure 3 This is a schematic diagram of the structure of the middle box in the present invention;

[0025] Figure 4 1 is a circuit diagram of the present invention.

[0026] In the figure, 1. Box body; 11. Top cover; 12. Middle box; 121. Charging battery position; 122. Power battery position; 123. Indicator light; 124. Circuit board; 13. Bottom box; 2. Main control microcontroller; 3. Discharge circuit; 4. Sampling circuit; 5. Discharge control circuit; 51. Optocoupler IC4; 52. Transistor VT1; 6. DS2711 chip; 7. Drying device; 71. Hanging basket; 711. Air vent; 72. Desiccant; 8. Boost circuit. DETAILED DESCRIPTION

[0027] The present invention is further described below in conjunction with the accompanying drawings. Those skilled in the art will readily appreciate the other advantages and benefits of the present invention from the disclosure herein. Terms such as "upper," "lower," "left," "right," and "center" are used herein for clarity and are not intended to limit the scope of the present invention. Any changes or adjustments to these terms, without materially altering the technical content, are considered within the scope of the present invention.

[0028] Example:

[0029] like Figures 1 to 3 The figure shows a split-type hearing aid drying and charging device designed in accordance with the present invention. The device comprises a housing 1, which comprises a top cover 11, a middle box 12, and a bottom box 13. The bottom box 13 houses a drying device 7 for drying hearing aids. The top wall of the middle box 12 defines a power battery compartment 122 and a rechargeable battery compartment 121. A backup battery is removably installed in the rechargeable battery compartment 121, and a AA alkaline battery is removably connected to the power battery compartment 122. A circuit board 124 is mounted within the middle box 12. Both the power battery compartment 122 and the rechargeable battery compartment 121 are connected to the circuit board 124 via electrode springs. Current from the AA alkaline battery flows through the positive electrode spring in the power battery compartment 122 and the circuit board 124 to charge the backup battery.

[0030] like Figure 2 As shown, the box body 1 includes a bottom box 13, a middle box 12 and an upper cover connected in sequence. The bottom box 13, the middle box 12 and the upper cover are all connected by threads. The power battery position 122 and the rechargeable battery position 121 are both arranged on the top wall of the middle box 12. A drying device 7 is arranged in the bottom box 13. The drying device 7 includes a hanging basket 71 and a desiccant 72. The desiccant 72 is laid on the bottom wall of the bottom box 13. The hanging basket 71 is installed in the bottom box 13 and is located above the desiccant 72. A number of air holes 711 are evenly distributed on the bottom wall of the hanging basket 71. The desiccant 72 is made of dry cakes or dry particles. After long-term use, the hearing aid becomes damp due to the moisture in the ear canal and the moisture in the air, which makes it easy to breed bacteria and affect the health of the user. At this time, the hearing aid is placed in the hanging basket 71, the hanging basket 71 is hung in the bottom box 13, and then the middle box 12 and the bottom box 13 are tightened. The desiccant 72 dehumidifies the hearing aid, effectively preventing bacteria from growing in the later stage.

[0031] like Figure 4As shown, the circuit board 124 is connected to a main control microcontroller 2, a discharge control circuit 5, a discharge loop 3, a DS2711 chip 6 and a sampling loop 4. The main control microcontroller 2 is an STC15W401AS microcontroller. The main control microcontroller 2 is connected to the discharge control circuit 5. The discharge control circuit 5 includes an optocoupler IC451 and a transistor VT152. The discharge loop 3 includes a resistor R20 and a transistor VT3. The P3.0 interface of the main control microcontroller 2 is connected to the light-emitting diode of the optocoupler IC451, the photosensitive transistor of the optocoupler IC451 is connected to the emitter of the transistor VT152, the collector of the transistor VT152 is connected to the positive electrode of the charging battery position 121, R20 is connected to the collector of the transistor VT3, the emitter of the transistor VT3 is connected to the negative electrode of the power battery position 122, the base of the transistor VT3 is connected to the resistor R28, and R28 is connected to the P3.6 interface of the main control microcontroller 2.

[0032] like Figure 4 As shown, sampling circuit 4 is connected in parallel with rechargeable battery position 121. Sampling circuit 4 includes resistor R21 and potentiometer RP1. Resistor R21 and potentiometer RP1 are connected in series. The middle pin of potentiometer RP1 is connected to pin P1.0 of main control microcontroller 2. CC1 interface of DS2711 chip 6 is connected to the base of transistor VT152. The emitter of transistor VT152 is connected to the positive terminal of power battery position 122. The collector of transistor VT152 is connected to the positive terminal of rechargeable battery position 121. VP1 interface of DS2711 chip 6 is connected to the positive terminal of rechargeable battery position 121.

[0033] When charging the backup battery, the voltage across the battery collected by the sampling circuit 4 is transmitted to the P1.0 pin of the main control microcontroller 2. When the main control microcontroller 2 detects that 0.9V < the voltage of the battery bit 121 < 1.3V, the main control microcontroller 2 simultaneously issues two instructions:

[0034] Instruction 1: The P3.6 interface outputs a high level to turn on the transistor VT3 in the forward direction. The backup battery in the charging battery position 121 is discharged through the positive electrode → resistor R20 → transistor VT3 collector → transistor VT3 emitter to ground → backup battery negative electrode, forming a discharge loop 3.

[0035] Instruction 2: The P3.0 interface outputs a low level, the LED of the optocoupler IC451 is forward-biased and illuminated, the phototransistor is illuminated and turns on, and the base of transistor VT152 is pulled up to the power supply position, turning off the reverse bias. The charging power supply is cut off, maintaining the discharge state of the rechargeable battery. During the backup battery charging process, if the battery is fully charged but charging has not stopped, the discharge circuit 3 begins to discharge, and the discharge control circuit cuts off the power supply, effectively avoiding the memory effect caused by overcharging.

[0036] When the sampling circuit 4 detects that the voltage across the rechargeable battery is below 0.9V, the main control microcontroller 2 simultaneously issues two instructions:

[0037] Instruction three: The P3.6 interface outputs a low level, the transistor VT3 is reverse biased and cut off, cutting off the discharge circuit and stopping the battery from discharging;

[0038] Instruction four: The P3.0 interface outputs a high level, the light-emitting diode of the optocoupler IC451 is reverse-biased and cut off, stops emitting light, the phototransistor is cut off, the transistor VT1 is separated from the control of P3.0, the base of the transistor VT1 is restored to be connected to the CC1 interface of the DS2711 chip 6, and the collector continues to charge the backup battery.

[0039] like Figure 3 and Figure 4 As shown, there are two rechargeable battery slots 121. Two indicator lights 123 are installed on the top wall of the middle box 12, corresponding to the two rechargeable battery slots 121. Two sets of discharge circuits, discharge control circuit 5, and sampling circuits are provided for the two rechargeable battery slots 121. Another sampling circuit set is connected in parallel with the other rechargeable battery slot 121 and includes a resistor R25 and a potentiometer RP2 connected in series. The middle pin of the potentiometer RP2 is connected to the P1.1 interface of the main control microcontroller 2. The CC2 interface of the DS2711 chip 6 is connected to the positive terminal of the other power battery slot 122, and the VP2 interface of the DS2711 chip 6 is connected to the positive terminal of the other rechargeable battery slot 121.

[0040] like Figure 4 As shown, the discharge control circuit 5 includes an optocoupler IC5 and a transistor VT2, and the discharge loop 3 includes a resistor R24 ​​and a transistor VT4; the P3.0 interface of the main control microcontroller 2 is connected to the light-emitting diode of the optocoupler IC451, the photosensitive transistor of the optocoupler IC451 is connected to the emitter of the transistor VT2, the collector of the transistor VT2 is connected to the positive electrode of another charging battery position 121, R24 is connected to the collector of the transistor VT4, the emitter of the transistor VT4 is connected to the negative electrode of the power battery position 122, the base of the transistor VT4 is connected to the resistor R29, and R29 is connected to the P3.7 interface of the main control microcontroller 2. The instructions are the same as above and are not repeated here.

[0041] like Figure 4As shown, two indicator lights 123 are connected to the LED1 and LED2 interfaces of the DS2711 chip 6, respectively. A boost circuit 8 is connected between the power supply battery 122, the main control microcontroller 2, and the DS2711 chip 6. The main control microcontroller 2 operates at 5V, while the input voltage of the DS2711 chip 6 is 4.0-5.5V. The boost circuit 85 includes capacitors C1, C3, and C4, resistors R1, R2, R3, and R4, an inductor L, and an NCP1422 chip. C1 is connected in parallel with the power supply battery 122, while R3 and R4 are connected in series and then in parallel with the power supply battery 122.

[0042] The negative terminal of R3 is connected to the LBI / EN interface of the NCP1422 chip. The OUT interface of the NCP1422 chip is connected to the CC1 and CC2 interfaces of the DS2711 chip 621 via a bus. One end of R1 is connected to the bus, and the other end is connected to the FB interface of the NCP1422 chip. C4 is connected in parallel with R1 and connected to R2. One end of C3 is connected to the REF interface of the NCP1422 chip, and the other end is connected to the negative terminal of the power supply battery 122. One end of inductor L is connected to the positive terminal of the power supply battery 122, and the other end is connected to the LX interface of the NCP1422 chip; the BAT interface of the NCP1422 chip is connected to the positive terminal of the power supply battery 122.

[0043] This embodiment uses a built-in power supply that uses non-rechargeable AA / AAA batteries, allowing for charging button batteries without an external power source, making it easy to carry. AA and AAA alkaline batteries are inexpensive and readily available, and the option to use either AA or AAA further enhances convenience. A single AA alkaline battery can recharge a 675 rechargeable button battery of the largest specification and capacity over 40 times, making it durable and environmentally friendly.

[0044] The implementation principle of the above embodiment is as follows: the backup battery is placed in the charging battery position 121, and after the alkaline battery is installed in the power battery position 122, the backup battery enters the charging state, the sampling circuit detects the voltage of the charging battery position 121 and transmits it to the main control microcontroller 2, when the main control microcontroller 2 monitors that the voltage across the charging battery position 121 is greater than 0.9V and less than 1.3V, the discharge circuit 3 is turned on, and the discharge control circuit maintains the discharge state of the backup battery, effectively avoiding memory damage caused by overcharging; when the voltage across the charging battery position 121 is less than 0.9V, the discharge control circuit 5 and the discharge circuit 3 are cut off, the transistor VT152 is disconnected from the P3.0 control, the connection between the CC1 port of the DS2711 chip and the transistor VT152 is restored, and the collector of the transistor VT1 resumes the charging state of the charging battery position 121.

[0045] This specific embodiment is merely an explanation of the present invention and is not intended to limit the present invention. After reading this specification, those skilled in the art may make non-creative modifications to this embodiment as needed. However, as long as such modifications are within the scope of the claims of the present invention, they are protected by patent law.

Claims

1. A drying and charging device for a split hearing aid, characterized in that: The invention comprises a box body (1), wherein a power battery position (122) and a charging battery position (121) are provided on the box body (1), and a backup battery is detachably installed in the charging battery position (121); a circuit board (124) is installed in the box body (1); the power battery position (122) charges the backup button battery in the charging battery position (121) through the circuit board (124); a main control microcontroller (2), a discharge circuit (3) and a sampling circuit (4) are connected to the circuit board (124); the sampling circuit (4) collects the voltage at both ends of the charging battery position (121) and transmits it to an interface of the main control microcontroller (2); the main control microcontroller (2) controls the discharge circuit (3) to discharge through an electronic load to eliminate the memory effect of the backup battery; The main control single chip microcomputer (2) is an STC15W401AS single chip microcomputer. The main control single chip microcomputer (2) is connected to a discharge control circuit (5). The discharge control circuit (5) includes an optocoupler IC4 (51) and a transistor VT1 (52). The discharge circuit (3) includes a resistor R20 and a transistor VT3. The P3.0 interface of the main control single chip microcomputer (2) is connected to the light emitting diode of the optocoupler IC4 (51). The photosensitive transistor of the optocoupler IC4 (51) is connected to the emitter of the transistor VT1 (52). The collector of the transistor VT1 (52) is connected to the positive electrode of the charging battery position (121). The R20 is connected to the collector of the transistor VT3. The emitter of the transistor VT3 is connected to the negative electrode of the power battery position (122). The base of the transistor VT3 is connected to a resistor R28. The R28 is connected to the P3.6 interface of the main control single chip microcomputer (2). When charging the backup battery, the voltage across the battery collected by the sampling circuit 4 is transmitted to the P1.0 pin of the main control microcontroller 2. When the main control microcontroller 2 detects that 0.9V < the voltage of the battery bit 121 < 1.3V, the main control microcontroller 2 simultaneously issues two instructions: Instruction 1: The P3.6 interface outputs a high level to turn on the transistor VT3 in the forward direction. The backup battery in the charging battery position 121 is discharged through the positive electrode → resistor R20 → transistor VT3 collector → transistor VT3 emitter to ground → backup battery negative electrode, forming a discharge loop 3. Instruction 2: The P3.0 interface outputs a low level, the light-emitting diode of the optocoupler IC451 is forward-biased and turns on, the phototransistor is turned on by light, the base of the transistor VT152 is pulled up to the power supply position, and the reverse bias is cut off; the charging power is cut off, maintaining the discharge state of the rechargeable battery; During the charging process of the backup battery, when the battery is fully charged but the charging has not stopped, the discharge circuit 3 starts to discharge, and the discharge control circuit cuts off the power supply, effectively avoiding the memory effect caused by overcharging; When the sampling circuit 4 detects that the voltage across the rechargeable battery is below 0.9V, the main control microcontroller 2 simultaneously issues two instructions: Instruction three: The P3.6 interface outputs a low level, the transistor VT3 is reverse biased and cut off, cutting off the discharge circuit and stopping the battery from discharging; Instruction four: The P3.0 interface outputs a high level, the light-emitting diode of the optocoupler IC451 is reverse-biased and cut off, stops emitting light, the phototransistor is cut off, the transistor VT1 is separated from the control of P3.0, the base of the transistor VT1 is restored to be connected to the CC1 interface of the DS2711 chip 6, and the collector continues to charge the backup battery.

2. The drying and charging device for a split hearing aid according to claim 1, characterized in that: A DS2711 chip (6) is connected to the circuit board (124); a CC1 interface of the DS2711 chip (6) is connected to the base of a transistor VT1 (52); an emitter of the transistor VT1 (52) is connected to the positive electrode of a power battery position (122); a collector of the transistor VT1 (52) is connected to the positive electrode of a charging battery position (121); and a VP1 interface of the DS2711 chip (6) is connected to the positive electrode of the charging battery position (121).

3. The drying and charging device for a split hearing aid according to claim 1, characterized in that: The box body (1) comprises a bottom box (13), a middle box (12) and an upper cover which are connected in sequence; the power battery position (122) and the rechargeable battery position (121) are both arranged on the top wall of the middle box (12); and a drying device (7) is arranged in the bottom box (13).

4. The drying and charging device for a split hearing aid according to claim 3, characterized in that: The drying device (7) comprises a hanging basket (71) and a desiccant (72), wherein the desiccant (72) is laid on the bottom wall of the bottom box (13), the hanging basket (71) is installed in the bottom box (13) and is located above the desiccant (72), and a plurality of air holes (711) are evenly distributed on the bottom wall of the hanging basket (71).

5. The drying and charging device for a split hearing aid according to claim 4, characterized in that: An indicator light (123) is installed on the top wall of the middle box (12), and the indicator light (123) is connected to the LED1 interface of the DS2711 chip (6).

6. The drying and charging device for a split hearing aid according to claim 2, characterized in that: The power supply battery position (122) is detachably connected to a 1.5V alkaline battery. The operating voltage of the main control microcontroller (2) is 5V, the input voltage of the DS2711 chip (6) is 4.0-5.5V, and a boost circuit (8) is connected between the power supply battery position (122), the main control microcontroller (2), and the DS2711 chip (6).

7. The drying and charging device for a split hearing aid according to claim 5, characterized in that: The side walls of the middle box (12) are connected to the top cover (11) and the bottom box (13) by threads near the top wall and the bottom wall.

8. The drying and charging device for a split hearing aid according to claim 7, characterized in that: The number of the rechargeable battery positions (121) is two.

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