Oral cavity cleaning device with pressure feedback function

Abstract

The oral cavity cleaning device with the pressure feedback function comprises a shell, an ultrasonic transducer, a cleaning head, a circuit board and a battery, the control circuit board is provided with an MCU controller, a drive circuit connected with the MCU controller and used for the ultrasonic transducer to work, and a transformer connected with the drive circuit. The transformer comprises a primary winding, a secondary winding and a feedback winding, the primary winding is connected with the driving circuit, the secondary winding is connected with the transformer, the feedback winding is connected with a load detection loop which is used for detecting the current load conditions of the ultrasonic transducer and the cleaning head and is matched with the MCU controller to judge the pressing force of the cleaning head, and the load detection loop is connected with the MCU controller; the control circuit board is further connected with an alarm circuit used for giving an alarm when the MCU judges that the pressing force of the cleaning head is overloaded. Through the pressure feedback function, when the pressing force exceeds a set value, the alarm circuit gives an alarm, and teeth are prevented from being damaged.

Description

Technical Field

[0001] This utility model relates to the field of oral cleaning tools, and specifically to an oral cleaning device with pressure feedback function. Background Technology

[0002] As people pay more and more attention to oral health, a variety of teeth cleaning tools have appeared on the market. Ultrasonic scalers use the high frequency and high energy generated by ultrasonic waves to drive the cleaning head, loosening the small tartar attached to the teeth, removing plaque and other debris, leaving teeth clean and maintaining oral health.

[0003] Currently available ultrasonic dental scalers, when used, involve holding the device and having the cleaning head at the top contact the teeth. Ultrasonic vibrations clean the teeth, requiring a certain amount of force to press the cleaning head against the tooth surface for effective cleaning. However, current ultrasonic dental scalers (CN116269882A, CN219680830U, CN219846912U, CN220801158U, etc.) lack pressure detection capabilities. This means they cannot know the pressure the cleaning head is applying to the tooth surface. Excessive pressure can damage teeth and cause significant discomfort to users. Therefore, a pressure feedback oral cleaning device is needed.

[0004] In view of the above, the inventors propose the following technical solution. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide an oral cleaning device with pressure feedback function.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: The oral cleaning device with pressure feedback function includes a housing, an ultrasonic transducer installed in the housing, a cleaning head installed on the upper end of the ultrasonic transducer, a control circuit board for controlling the operation of the ultrasonic transducer, and a battery for power supply. The control circuit board is equipped with an MCU controller, a drive circuit connected to the MCU controller and used for the operation of the ultrasonic transducer, and a transformer connected to the drive circuit. The transformer includes a primary winding, a secondary winding, and a feedback winding. The primary winding is connected to the drive circuit, the secondary winding is connected to the transformer, and the feedback winding is connected to a load detection circuit for detecting the current load of the ultrasonic transducer and the cleaning head and cooperating with the MCU controller to determine the pressure of the cleaning head. The load detection circuit is connected to the MCU controller. The control circuit board is also connected to an alarm circuit for issuing an alarm when the MCU controller determines that the pressure of the cleaning head is overloaded.

[0007] Furthermore, in the above technical solution, the secondary winding is also connected to an inductor for secondary voltage boosting, and this inductor is connected to an ultrasonic transducer.

[0008] Furthermore, in the above technical solution, one end of the feedback winding is grounded, and the other end of the feedback winding is connected to the load detection circuit. The load detection circuit includes a diode D7, a first voltage divider resistor R17, and a second voltage divider resistor R19 connected in series. The other end of the second voltage divider resistor R19 connected to the first voltage divider resistor R17 is grounded, and a first capacitor C10 is connected in parallel across the two ends of the second voltage divider resistor R19. The diode D7 is connected to the other end of the feedback winding, and the connection line between the second voltage divider resistor R19 and the first voltage divider resistor R17 is connected to the MCU controller.

[0009] Furthermore, in the above technical solution, one end of the primary winding is connected to the drive circuit, the other end is connected to the second capacitor C4 and then grounded, and the other end of the primary winding is also connected to the battery.

[0010] Furthermore, in the above technical solution, the driving circuit includes a MOSFET, a first resistor R9 connected to the gate of the MOSFET, a second resistor R12 connected to the source of the MOSFET, a third resistor R11 connected between the gate and source of the MOSFET, and a third capacitor C6 connected in parallel across the first resistor R9. The drain of the MOSFET is connected to the primary winding, and the first resistor R9 is connected to the MCU controller.

[0011] Furthermore, in the above technical solution, the driving circuit is also connected to a current detection circuit for cooperating with the MCU controller to detect the vibration frequency of the ultrasonic transducer, and this current detection circuit is connected to the MCU controller.

[0012] Furthermore, in the above technical solution, the current detection circuit includes a fourth resistor R13. One end of the fourth resistor R13 is connected to the connection line between the source (S) terminal of the MOS transistor and the second resistor R12, and the other end of the fourth resistor R13 is connected to the MCU controller.

[0013] Furthermore, in the above technical solution, the alarm circuit includes a buzzer or horn for emitting an audible alarm; or, the alarm circuit includes a vibration motor for emitting a vibration alarm; or, the alarm circuit includes an LED for emitting a light alarm.

[0014] Furthermore, in the above technical solution, the control circuit board is also provided with a lithium battery charging management chip, a power on / off shift button electrically connected to the lithium battery charging management chip, an external power charging wake-up circuit electrically connected to the lithium battery charging management chip, a battery socket electrically connected to the lithium battery charging management chip, a charging interface electrically connected to the lithium battery charging management chip, and a gear indicator light group. The lithium battery charging management chip, the external power charging wake-up circuit, the power on / off shift button, the battery socket for connecting to the battery, and the gear indicator light group are all connected to the MCU controller. The external power charging wake-up circuit is also connected to the charging interface.

[0015] Furthermore, in the above technical solution, the external power supply charging wake-up circuit includes a fifth resistor R1 and a sixth resistor R2 connected in series. The fifth resistor R1 is also connected to the battery socket and the lithium battery charging management chip, and the connection line between the fifth resistor R1 and the sixth resistor R2 is also connected to the MCU controller.

[0016] After adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art: When the control circuit board controls the operation of the ultrasonic transducer, the MCU controller outputs a control signal to the drive circuit. The drive circuit is turned on to drive the primary winding of the transformer to cause the secondary winding to vibrate through the principle of electromagnetic induction, thereby driving the ultrasonic transducer to work. The ultrasonic transducer outputs ultrasonic vibrations to the cleaning head to achieve the purpose of controlling the operation of the cleaning head. Since the transformer is equipped with a feedback winding, the feedback winding is used to detect the current load of the ultrasonic transducer and cooperate with the MCU controller to determine the pressure of the cleaning head, that is, to realize the pressure feedback function. When the pressure exceeds the set value (i.e., overload), the MCU controller outputs a signal to the alarm circuit, and the alarm circuit issues an alarm to remind the user. The user then moves the cleaning head outward to away from the teeth, thereby minimizing the damage to the teeth caused by the cleaning head. Attached Figure Description

[0017] Figure 1 This is the circuit diagram of this utility model;

[0018] Figure 2 This is a perspective view of the present invention;

[0019] Figure 3 This is a diagram of the internal structure of this utility model. Detailed Implementation

[0020] The present invention will be further described below with reference to specific embodiments and accompanying drawings.

[0021] See Figure 1-3As shown, an oral cleaning device with pressure feedback function includes a housing 1, an ultrasonic transducer 2 installed in the housing 1, a cleaning head 3 installed on the upper end of the ultrasonic transducer 2, a control circuit board 4 for controlling the operation of the ultrasonic transducer 2, and a battery 5 for power supply. During operation, the battery 5 supplies power to the entire oral cleaning device, and the control circuit board 4 controls the ultrasonic transducer 2 to operate. The ultrasonic transducer 2 drives the cleaning head 3 to vibrate to clean / clean the oral cavity. In this embodiment, the cleaning head 3 is a dental cleaning head, making this invention a dental cleaning device.

[0022] The control circuit board 4 is equipped with an MCU controller 41, a drive circuit 42 connected to the MCU controller 41 and used for the operation of the ultrasonic transducer 2, and a transformer 43 connected to the drive circuit 42. The transformer 43 includes a primary winding 431, a secondary winding 432, and a feedback winding 433. The primary winding 431 is connected to the drive circuit 42, the secondary winding 432 is connected to the transformer 43, and the feedback winding 433 is connected to a load detection circuit 44 for detecting the current load of the ultrasonic transducer 2 and the cleaning head and cooperating with the MCU controller 41 to determine the pressure of the cleaning head 3. The load detection circuit 44 is connected to the MCU controller 41. The control circuit board 4 is also connected to an alarm circuit 40 for issuing an alarm when the MCU controller 41 determines that the pressure of the cleaning head 3 is overloaded.

[0023] When the control circuit board 4 controls the operation of the ultrasonic transducer 2, the MCU controller 41 outputs a control signal to the drive circuit 42. The drive circuit 42 is turned on to drive the primary winding 431 of the transformer 43 to cause the secondary winding 432 to vibrate through the principle of electromagnetic induction, thereby driving the ultrasonic transducer 2 to work. The ultrasonic transducer 2 outputs ultrasonic vibrations to the cleaning head 3 to achieve the purpose of controlling the operation of the cleaning head 3. Since the transformer 43 is equipped with a feedback winding 433, the feedback winding 433 is used to detect the current load of the ultrasonic transducer 2 and cooperate with the MCU controller 41 to determine the pressure of the cleaning head 3, that is, to realize the pressure feedback function. When the pressure exceeds the set value (i.e., overload), the MCU controller 41 outputs a signal to the alarm circuit 40, and the alarm circuit 40 issues an alarm to remind the user. The user then moves the cleaning head 3 outwards away from the teeth, so that the cleaning head 3 will not damage the teeth as much as possible. At the same time, the MCU controller 41 can output a control signal to the drive circuit 42. The drive circuit 42 is turned on to drive the primary winding 431 of the transformer 43 to control the secondary winding 432 to reduce the operating frequency of the ultrasonic transducer 2 through the principle of electromagnetic induction, thereby controlling and reducing the vibration amplitude / force of the cleaning head 3, so as to minimize the damage to the teeth by the cleaning head 3, and even control the ultrasonic transducer 2 to be in standby mode, thereby avoiding damage to the teeth by the cleaning head 3.

[0024] The alarm circuit 40 includes a buzzer 400 or a horn for emitting an audible alarm; alternatively, the alarm circuit 40 includes a vibration motor for emitting a vibration alarm; or alternatively, the alarm circuit 40 includes an LED for emitting a light alarm. In this preferred embodiment, the alarm circuit 40 includes a buzzer 400 for emitting an audible alarm, which emits an audible alarm to notify the user when the alarm circuit 40 is activated.

[0025] Combination Figure 1 As shown, the primary winding 431 is located between pins 2 and 5 of the transformer 43, the feedback winding 433 is located between pins 3 and 4 of the transformer 43, and the secondary winding 432 is located between pins 6 and 10 of the transformer 43.

[0026] The secondary winding 432 is also connected to an inductor 45 for secondary voltage boosting, which is connected to the ultrasonic transducer 2. The inductor 45 can further boost the voltage output from the secondary winding 432 to the ultrasonic transducer 2, thereby enabling better driving of the ultrasonic transducer 2.

[0027] One end of the feedback winding 433 is grounded, and the other end is connected to the load detection circuit 44. The load detection circuit 44 includes a diode D7, a first voltage divider resistor R17, and a second voltage divider resistor R19 connected in series. The other end of the second voltage divider resistor R19 connected to the first voltage divider resistor R17 is grounded, and a first capacitor C10 is connected in parallel across the second voltage divider resistor R19. The diode D7 is connected to the other end of the feedback winding 433, and the connection line between the second voltage divider resistor R19 and the first voltage divider resistor R17 is connected to the MCU controller 41. The feedback winding 433 is rectified by the diode D7, and the voltage is divided by the first voltage divider resistor R17 and the second voltage divider resistor R19. The voltage signal is then fed back to the MCU controller 41. The MCU controller 41 uses the received voltage signal to determine the current load condition of the ultrasonic transducer 2, and thus determines the pressure applied by the cleaning head 3, thereby realizing the pressure feedback function.

[0028] One end of the primary winding 431 is connected to the drive circuit 42, and the other end is connected to the second capacitor C4 and grounded. The other end of the primary winding 431 is also connected to the battery.

[0029] The driving circuit 42 includes a MOSFET 421, a first resistor R9 connected to the gate (G) of the MOSFET 421, a second resistor R12 connected to the source (S) of the MOSFET 421, a third resistor R11 connected between the gate and source of the MOSFET 421, and a third capacitor C6 connected in parallel across the first resistor R9. The drain (D) of the MOSFET 421 is connected to the primary winding 431, and the first resistor R9 is connected to the MCU controller 41. When the driving circuit 42 is working, the MCU controller 41 outputs a signal to the MOSFET 421 to control the MOSFET 421. The MOSFET 421 drives the primary winding 431 of the transformer 43 to oscillate the secondary winding 432 through electromagnetic induction, thereby driving the ultrasonic transducer 2 to work.

[0030] The drive circuit 42 is also connected to a current detection circuit 46 for cooperating with the MCU controller 41 to detect the vibration frequency of the ultrasonic transducer 2. This current detection circuit 46 is connected to the MCU controller 41 and includes a fourth resistor R13. One end of the fourth resistor R13 is connected to the connection line between the source (S) terminal of the MOSFET 421 and the second resistor R12, and the other end of the fourth resistor R13 is connected to the MCU controller 41. The current detection circuit 46 detects the current flowing through the second resistor R12 and transmits the current signal to the MCU controller 41. The MCU controller 41 then detects the vibration frequency of the ultrasonic transducer 2, enabling more precise adjustment of the ultrasonic transducer 2's vibration frequency in later stages.

[0031] The control circuit board 4 is also provided with a lithium battery charging management chip 47, a power on / off shift button 48 electrically connected to the lithium battery charging management chip 47, an external power charging wake-up circuit 49 electrically connected to the lithium battery charging management chip 47, a battery socket 401 electrically connected to the lithium battery charging management chip 47, a charging interface 402 electrically connected to the lithium battery charging management chip 47, and a gear indicator light group 403. The lithium battery charging management chip 47, the external power charging wake-up circuit 49, the power on / off shift button 48, the battery socket 401 for connecting to the battery, and the gear indicator light group 403 are all connected to the MCU controller 41. The external power charging wake-up circuit 49 is also connected to the charging interface 402.

[0032] The power on / off switch button 48 is used to control the operation of the entire circuit, or to control the power on and off of the entire oral cleaning device. Simultaneously, the power on / off switch button 48 can also control the speed settings of the ultrasonic transducer 2. Specifically, the number of times the power on / off switch button 48 is pressed or the duration of pressing it outputs different control signals to the MCU controller 41, which in turn controls the drive circuit 42 to operate, working in conjunction with the transformer to drive the ultrasonic transducer 2 to operate at different speed settings. Meanwhile, the speed indicator light group 403 displays the corresponding speed setting of the ultrasonic transducer 2, allowing the user to know the current operating speed information. In this embodiment, the speed indicator light group 403 includes five LEDs to define five different speed settings, and each of the five LEDs is connected to a pin of the MCU controller 41 for individual control of its illumination.

[0033] The lithium battery charging management chip 47 is used to manage battery charging, which is common knowledge.

[0034] The external power supply charging wake-up circuit 49 works as follows: when the charging interface 402 is inserted and outputs voltage, the external power supply charging wake-up circuit 49 starts with a 5V voltage to power the lithium battery charging management chip 47, MCU controller 41, and other chips, thus starting the entire circuit. The external power supply charging wake-up circuit 49 includes a fifth resistor R1 and a sixth resistor R2 connected in series. The fifth resistor R1 is also connected to the battery socket 401 and the lithium battery charging management chip 47. The connection line between the fifth resistor R1 and the sixth resistor R2 is also connected to the MCU controller 41. The structure of the external power supply charging wake-up circuit 49 is extremely simple.

[0035] The control circuit board 4 is also provided with a headlight socket 404 and a charging indicator light group 405 electrically connected to the MCU controller 41. Both the headlight socket 404 and the charging indicator light group 405 are also connected to the battery socket 401. An external lighting module 6 is provided on the upper end of the housing 1, and this lighting module 6 is electrically connected to the headlight socket 404. The lighting module 6 provides illumination during operation; that is, when the cleaning head 3 contacts the teeth to clean them, the lighting module 6 emits light that illuminates the teeth, thus providing illumination for the user to clean their teeth. The lighting module 6 includes an LED light board 61 electrically connected to the headlight socket 404, LEDs mounted on the LED light board 61, and a light guide sleeve 62 fixed to the upper end of the housing 1. The light guide sleeve 62 corresponds to the LEDs and guides the light emitted by the LEDs to the outside, thereby achieving the illumination function.

[0036] In summary, when the control circuit board 4 controls the operation of the ultrasonic transducer 2, the MCU controller 41 outputs a control signal to the drive circuit 42. The drive circuit 42 is turned on to drive the primary winding 431 of the transformer 43 to cause the secondary winding 432 to vibrate through the principle of electromagnetic induction, thereby driving the ultrasonic transducer 2 to work. The ultrasonic transducer 2 outputs ultrasonic vibrations to the cleaning head 3 to achieve the purpose of controlling the operation of the cleaning head 3. Since the transformer 43 is equipped with a feedback winding 433, the feedback winding 433 is used to detect the current load of the ultrasonic transducer 2 and, together with the MCU controller 41, determines the pressure of the cleaning head 3, that is, to realize the pressure feedback function. When the pressure exceeds the set value (i.e., overload), the MCU controller 41 outputs a signal to the alarm circuit 40, and the alarm circuit 40 issues an alarm to remind the user. The user then moves the cleaning head 3 outwards away from the teeth, thereby minimizing the damage to the teeth caused by the cleaning head 3. At the same time, the MCU controller 41 can output a control signal to the drive circuit 42. The drive circuit 42 is turned on to drive the primary winding 431 of the transformer 43 to control the secondary winding 432 to reduce the operating frequency of the ultrasonic transducer 2 through the principle of electromagnetic induction, thereby controlling and reducing the vibration amplitude / force of the cleaning head 3, so as to minimize the damage to the teeth by the cleaning head 3, and even control the ultrasonic transducer 2 to be in standby mode, thereby avoiding damage to the teeth by the cleaning head 3.

[0037] Of course, the above description is only a specific embodiment of the present utility model and is not intended to limit the scope of the present utility model. All equivalent changes or modifications made to the structure, features and principles described in the claims of the present utility model should be included in the scope of the claims of the present utility model.

Claims

1. An oral cleaning device with pressure feedback function, comprising a housing (1), an ultrasonic transducer (2) installed in the housing (1), a cleaning head (3) installed on the upper end of the ultrasonic transducer (2), a control circuit board (4) for controlling the operation of the ultrasonic transducer (2), and a battery (5) for power supply, characterized in that: The control circuit board (4) is provided with an MCU controller (41), a drive circuit (42) connected to the MCU controller (41) and used for the operation of the ultrasonic transducer (2), and a transformer (43) connected to the drive circuit (42). The transformer (43) includes a primary winding (431), a secondary winding (432), and a feedback winding (433). The primary winding (431) is connected to the drive circuit (42), the secondary winding (432) is connected to the transformer (43), and the feedback winding (433) is connected to a load detection circuit (44) for detecting the current load of the ultrasonic transducer (2) and the cleaning head and cooperating with the MCU controller (41) to determine the pressure of the cleaning head (3). The load detection circuit (44) is connected to the MCU controller (41). The control circuit board (4) is also connected to an alarm circuit (40) for issuing an alarm when the MCU controller (41) determines that the pressure of the cleaning head (3) is overloaded.

2. The oral cleaning device with pressure feedback function according to claim 1, characterized in that: The secondary winding (432) is also connected to an inductor (45) for secondary boosting, which is connected to an ultrasonic transducer (2).

3. The oral cleaning device having a pressure feedback function according to claim 1, characterized in that: One end of the feedback winding (433) is grounded, and the other end of the feedback winding (433) is connected to the load detection circuit (44). The load detection circuit (44) includes a diode D7, a first voltage divider resistor R17, and a second voltage divider resistor R19 connected in series. The other end of the second voltage divider resistor R19 connected to the first voltage divider resistor R17 is grounded, and a first capacitor C10 is connected in parallel across the two ends of the second voltage divider resistor R19. The diode D7 is connected to the other end of the feedback winding (433), and the connection line between the second voltage divider resistor R19 and the first voltage divider resistor R17 is connected to the MCU controller (41).

4. The oral cleaning device having a pressure feedback function according to claim 2, characterized in that: One end of the primary winding (431) is connected to the drive circuit (42), and the other end is connected to the second capacitor C4 and grounded. The other end of the primary winding (431) is also connected to the battery.

5. The oral cleaning device having a pressure feedback function according to claim 1, characterized in that: The driving circuit (42) includes a MOSFET (421), a first resistor R9 connected to the gate of the MOSFET (421), a second resistor R12 connected to the source of the MOSFET (421), a third resistor R11 connected between the gate and source of the MOSFET (421), and a third capacitor C6 connected in parallel across the first resistor R9. The drain of the MOSFET (421) is connected to the primary winding (431), and the first resistor R9 is connected to the MCU controller (41).

6. The oral cleaning device having a pressure feedback function according to claim 1, characterized in that: The drive circuit (42) is also connected to a current detection circuit (46) for cooperating with the MCU controller (41) to detect the vibration frequency of the ultrasonic transducer (2), and the current detection circuit (46) is connected to the MCU controller (41).

7. An oral cleaning device with pressure feedback according to claim 6, characterized in that: The current detection circuit (46) includes a fourth resistor R13. One end of the fourth resistor R13 is connected to the connection line between the source of the MOS transistor (421) and the second resistor R12, and the other end of the fourth resistor R13 is connected to the MCU controller (41).

8. An oral cleaning device having a pressure feedback function according to any one of claims 1-7, characterized in that: The alarm circuit (40) includes a buzzer (400) or horn for emitting an audible alarm; or, the alarm circuit (40) includes a vibration motor for emitting a vibration alarm; or, the alarm circuit (40) includes an LED for emitting a light alarm.

9. The oral cleaning device having a pressure feedback function according to claim 8, characterized in that: The control circuit board (4) is also provided with a lithium battery charging management chip (47), a power on / off shift button (48) electrically connected to the lithium battery charging management chip (47), an external power charging wake-up circuit (49) electrically connected to the lithium battery charging management chip (47), a battery socket (401) electrically connected to the lithium battery charging management chip (47), a charging interface (402) electrically connected to the lithium battery charging management chip (47), and a gear indicator group (403). The lithium battery charging management chip (47), the external power charging wake-up circuit (49), the power on / off shift button (48), the battery socket (401) for connecting to the battery, and the gear indicator group (403) are all connected to the MCU controller (41). The external power charging wake-up circuit (49) is also connected to the charging interface (402).

10. The oral cleaning device having a pressure feedback function according to claim 9, characterized in that: The external power supply charging wake-up circuit (49) includes a fifth resistor R1 and a sixth resistor R2 connected in series. The fifth resistor R1 is also connected to the battery socket (401) and the lithium battery charging management chip (47). The connection line between the fifth resistor R1 and the sixth resistor R2 is also connected to the MCU controller (41).

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