Hearing aid digital display charging box

Abstract

The utility model discloses a hearing aid digital display charging box, comprising a control panel which is integrated with an MCU module, a display screen electrically connected with the output end of the MCU module, a low dropout voltage stabilizer and a power supply module which are electrically connected with the input end of the MCU module, and a first battery management module and a second battery management module which are bidirectionally and electrically connected with the MCU module. The battery management integration module is in bidirectional electric connection with the power supply module, the charging interface is electrically connected with the input end of the battery management integration module, and the switch is electrically connected with the charging interface and the output end of the power supply module. According to the utility model, the charging box can conveniently detect the battery electric quantity of the hearing aid, the size miniaturization of the hearing aid is facilitated, and a user can visually see the current electric quantity state of the charger and the charging box.

Description

Technical Field

[0001] The utility model specifically relates to a digital display charging box for hearing aids. Background Art

[0002] Most lithium - ion hearing aid charging boxes on the market display information through LED indicators. Users can only see the charging status of the hearing aids and whether the charging box is full, which is rather single. The current battery levels of both the charging box and the hearing aids cannot be directly observed through the charging box, causing anxiety about power usage for users. Summary of the Invention

[0003] Aiming at the deficiencies in the prior art, the purpose of the utility model is to provide a digital display charging box for hearing aids.

[0004] The technical solution adopted by the utility model to solve its technical problems is as follows:

[0005] A digital display charging box for hearing aids includes a control board, on which an MCU module is integrated, a display screen electrically connected to the output end of the MCU module, a low - dropout regulator and a power module electrically connected to the input end of the MCU module, a first battery management module and a second battery management module bidirectionally electrically connected to the MCU module, a battery management integrated module bidirectionally electrically connected to the power module, a charging interface electrically connected to the input end of the battery management integrated module, and a switch electrically connected to the charging interface and the output end of the power module.

[0006] Preferably, the first battery management module is correspondingly electrically connected to a first analog input module, such as a hearing aid to be charged.

[0007] Preferably, the second battery management module is correspondingly electrically connected to a second analog input module, such as a hearing aid to be charged.

[0008] Preferably, it further includes a charging box charging circuit, a hearing aid charging circuit and a digital display main circuit integrated on the control board.

[0009] Furthermore, the charging box charging circuit consists of a battery compartment charging management chip U1, a USB female socket J1 and the surrounding circuits.

[0010] Furthermore, the hearing aid charging circuit consists of charging management chips U2, U3 and the peripheral circuits.

[0011] Furthermore, the digital display main circuit consists of an LDO chip U4, an MCU chip U5, a digital tube module U6 and the peripherals.

[0012] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0013] ① The display of the battery levels and charging status of the charging box and the hearing aids is simple and intuitive;

[0014] ② Extremely low standby power consumption;

[0015] ③ Facilitate the charging case to detect the battery power of the hearing aid, and contribute to the miniaturization of the hearing aid size, enabling the user to intuitively view the current power status of the charger and the charging case. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a circuit principle block diagram of a digital display charging case for a hearing aid of the present utility model;

[0017] Figure 2 It is a charging principle diagram of the charging case;

[0018] Figure 3 It is a charging principle diagram of the left ear hearing aid in the hearing aid charging circuit;

[0019] Figure 4 It is a charging principle diagram of the right ear hearing aid in the hearing aid charging circuit;

[0020] Figure 5 It is a power supply principle diagram for the MCU module;

[0021] Figure 6 It is a circuit principle diagram for the MCU module and related peripherals;

[0022] Figure 7 It is a principle diagram of the display module;

[0023] Figure 8 It is a circuit principle diagram of the MCU power supply selection circuit. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] The present utility model will be further described below in conjunction with the drawings and specific embodiments, so that those skilled in the art can better understand the present utility model and be able to implement it, but the embodiments cited do not limit the present utility model.

[0025] Embodiment

[0026] A digital display charging case for a hearing aid, as Figure 1 shown, includes a control board, on which an MCU module is integrated, a display screen electrically connected to the output end of the MCU module, a low-dropout voltage regulator and a power supply module electrically connected to the input end of the MCU module, a first battery management module and a second battery management module bidirectionally electrically connected to the MCU module, a battery management integrated module bidirectionally electrically connected to the power supply module, a charging interface electrically connected to the input end of the battery management integrated module, and a switch electrically connected to the charging interface and the output end of the power supply module. The first battery management module is correspondingly electrically connected to a first analog input module, such as a hearing aid to be charged. The second battery management module is correspondingly electrically connected to a second analog input module, such as a hearing aid to be charged.

[0027] In this embodiment, it further includes a charging case charging circuit, a hearing aid charging circuit, and a digital display main circuit integrated on the control board. For details, refer to Figures 2 - 8 .

[0028] The charging case charging circuit consists of a battery compartment charging management chip U1, a USB female socket J1, and the surrounding circuits.

[0029] The hearing aid charging circuit consists of charging management chips U2 and U3 and the peripheral circuits.

[0030] The digital display main circuit consists of an LDO chip U4, an MCU chip U5, a digital tube module U6, and the peripherals.

[0031] Refer to Figures 1 - 8 for a further description of the working principle of the whole machine:

[0032] Figure 2 In [reference], J1 is the USB female socket of the charging case, and U1 is the charging management chip of the charging compartment, which is responsible for the charging management of the charging case battery and can also boost the battery voltage to 5V for use by the hearing aid charging circuit; U7 is an N+P type MOS transistor. When an external power supply is connected, the external power supply enters U1 from J1 through U7, and the MCU controls whether to charge the charging case battery by controlling the conduction and cutoff of U7; when detecting the voltage of the charging case battery, the MCU stops charging the charging case battery by controlling U7. At this time, the battery voltage is divided by R7 and R9 and then filtered by C4 and input to the MCU, and the voltage of the charging case battery is read by U5.1, avoiding the drawback that the voltage value read by the MCU deviates from the actual power due to the virtual high voltage of the battery during the charging process.

[0033] Figure 3 In [reference], U2 is the charging management chip for the left ear hearing aid, Q1 is a PMOS transistor, and R12 is a pull-up resistor; in this circuit, the gate of Q1 is controlled by the level state of U2.1 and the charge and discharge of C7, thereby controlling whether to supply power to U2; when the hearing aid is placed in, the voltage of C7 is instantly pulled down, providing a switching signal for Q1 to turn on the power supply of U2. U2.1 switches from the high-impedance state to the pull-down state and locks the conduction state of Q1, and U2 continuously charges the hearing aid; when the hearing aid battery is fully charged, U2.1 switches from the pull-down state to the high-impedance state, and the pull-up resistor R14 turns off Q1, thereby turning off the power supply of U2, greatly reducing the standby power consumption; during the charging process of the hearing aid, the MCU obtains the battery power of the hearing aid by reading the voltage division of R13 and R17. Figure 4 The right ear hearing aid charging circuit in [reference] is the same.

[0034] Figure 5 U4 in [reference] is an LDO module, which is used to convert the voltage into the working voltage of the MCU, 3.3V.

[0035] Figure 6 It is the MCU and the peripheral related circuits.

[0036] Figure 7 U6 is the display module. The MCU module reads the current power and charging status of the charging case battery through BAT_V_DCT and BAT_CHG_DCT, and finally controls the digital tube U6 to display. The display brightness of the digital tube is controlled by the resistance values of R30, R31, R32, R33, R34, and R35. Similarly, the voltage of the left ear hearing aid is detected by VHAL_DTC and CHG_HAL and displayed by U6, and the voltage of the right ear hearing aid is detected by VHAR_DTC and CHG_HAR and displayed by U6.

[0037] Figure 8 It is the MCU power supply selection circuit module. Q3 is a PMOS. When the USB charging is not inserted, the base of Q3 is pulled low and turned on by default due to R29 and R40, and the power supply of the MCU is supplied by the battery through Q3. When the USB charging is inserted, the base of Q3 is pulled up to 5V by R28 and cut off, and the power supply of the MCU is supplied by the 5V of the USB through D2. After R29 and R40 are voltage-divided in the figure, the MCU can identify whether the entire system is in the charging or single-device state by reading the voltage of USB_V_DCT.

[0038] The above embodiments of the present invention do not limit the protection scope of the present invention. The implementation manners of the present invention are not limited thereto. All kinds of modifications, substitutions or changes made to the above structure of the present invention according to the above content of the present invention, in accordance with the common technical knowledge and customary means in the art, without departing from the above basic technical idea of the present invention, shall fall within the protection scope of the present invention.

Claims

1. A hearing aid digital display charging box, comprising a control panel, characterized in that: The control board is integrated with an MCU module, a display screen electrically connected to the output end of the MCU module, a low voltage difference regulator and a power supply module electrically connected to the input end of the MCU module, a first battery management module and a second battery management module bidirectionally electrically connected to the MCU module, a battery management integrated module bidirectionally electrically connected to the power supply module, a charging interface electrically connected to the input end of the battery management integrated module, and a switch electrically connected to the charging interface and the output end of the power supply module.

2. The hearing aid digital display charging box according to claim 1, characterized in that: The first battery management module is electrically connected to the first analog input module, such as a hearing aid that needs to be charged.

3. The hearing aid digital display charging box according to claim 1, characterized in that: The second battery management module is electrically connected to a second analog input module, such as a hearing aid that needs to be charged.

4. The hearing aid digital display charging box according to claim 1, characterized in that: It also includes a charging box charging circuit, a hearing aid charging circuit and a digital display main circuit integrated on the control board.

5. The hearing aid digital display charging box according to claim 4, characterized in that: The charging circuit of the charging box consists of the battery compartment charging management chip U1, the USB socket J1 and surrounding circuits.

6. The hearing aid digital display charging box according to claim 4, characterized in that: The hearing aid charging circuit consists of charging management chips U2, U3 and peripheral circuits.

7. The hearing aid digital display charging box according to claim 4, characterized in that: The digital display main circuit consists of LDO chip U4, MCU chip U5, digital tube module U6 and peripherals.

Images