A water washing detection circuit for shaver and shaver

Abstract

The embodiment of the present invention discloses a water washing detection circuit for a shaver and a shaver, wherein the water washing detection circuit comprises: a motor driving circuit, a motor access and detection circuit connected to the motor driving circuit, and a water washing access detection circuit connected to the motor access and detection circuit; the water washing access detection circuit comprises a first detection contact and a first resistor, wherein the first detection contact is an exposed copper point arranged near the motor interface contact, one end of the first resistor is connected to the first detection contact, and the other end of the first resistor is grounded. Through the above method, the embodiment of the present invention can accurately judge whether the shaver is placed in a cleaning bin or in water washing, thereby avoiding the risk of misjudgment and misoperation.

Description

Technical Field

[0001] The embodiments of the present invention relate to the technical field of electronic power application, and in particular to a water washing detection circuit applied to a shaver. Background Art

[0002] The shavers on the market that support full-body water washing generally do not have a cleaning chamber, and the shavers with a cleaning chamber do not support the full-body water washing function. The main reason is that the contact points of the shaver cleaning chamber are prone to misjudgment during the external water flushing process, and it is impossible to clearly distinguish whether the shaver is in the cleaning chamber or in the water washing state, which has a great impact on the guarantee of the shaver's function and performance.

[0003] The current razor cleaning chamber judgment circuit is commonly used in the industry. The cleaning chamber function usually uses motor vibration to achieve cleaning. The cleaning chamber judgment is mainly based on the motor insertion detection judgment, that is, a pull-down resistor is used at the negative end of the motor to make an initial state judgment. When the motor is connected, the negative end of the motor is at a high level, and it is judged to enter the cleaning chamber mode and then perform corresponding operations. However, the application scenarios of such a circuit are limited. When the razor is rinsed with water from the outside or there is water in the use scenario, the dew point of the motor interface will be misconnected due to the conductivity of the water, resulting in misjudgment and affecting use. Summary of the invention

[0004] In view of the above problems, an embodiment of the present invention provides a water washing detection circuit applied to a shaver and a shaver, which overcomes the above problems or at least partially solves the above problems.

[0005] According to one aspect of an embodiment of the present invention, there is provided a water washing detection circuit for a shaver, comprising: a motor drive circuit, a motor access and detection circuit connected to the motor drive circuit, and a water washing access detection circuit connected to the motor access and detection circuit; the water washing access detection circuit comprises a first detection contact and a first resistor, the first detection contact is an exposed copper point arranged near the motor interface contact, one end of the first resistor is connected to the first detection contact, and the other end of the first resistor is grounded.

[0006] Optionally, when water flows through the first detection contact and the first access end of the motor interface contact, the first access end of the motor interface contact is connected to the first detection contact through the water flow, and the first detection contact is at a high level.

[0007] Optionally, the motor access and detection circuit includes: a motor, a second resistor and a motor access detection contact; the first access end of the motor is connected to the power supply, the second access end of the motor is connected to the motor drive circuit, the motor access detection contact is the second access end of the motor, and is grounded through the second resistor.

[0008] Optionally, the motor access and detection circuit also includes: a first capacitor, a second capacitor, a third capacitor and a diode; the anode of the diode is connected to the second access terminal of the motor, and the cathode of the diode is connected to the first access terminal of the motor; the second access terminal of the motor is also grounded through the first capacitor; the second capacitor is connected between the first access terminal and the second access terminal of the motor, and the first access terminal of the motor is also grounded through the third capacitor.

[0009] Optionally, the first capacitor and the third capacitor are 1 nF, and the second capacitor is 100 nF.

[0010] Optionally, when the motor is turned on, the motor access detection contact is connected to the power supply through the motor, and the motor access detection contact is at a high level.

[0011] Optionally, the motor drive circuit includes: a switching tube, a third resistor, a fourth resistor and a fifth resistor; the first end of the switching tube is connected to the motor drive signal through the fourth resistor, and is also grounded through the fifth resistor, the second end of the switching tube is connected to the motor access and detection circuit, and the third end of the switching tube is grounded through the third resistor.

[0012] Optionally, the motor drive circuit also includes: a sixth resistor and a fourth capacitor; one end of the sixth resistor is connected to the third end of the switch tube, and the other end is connected to the outside for current detection, and the other end of the sixth resistor is also grounded through the fourth capacitor.

[0013] Optionally, the switch tube is an NMOS tube, the first end is a gate, the second end is a drain, and the third end is a source.

[0014] Based on the same inventive concept, a shaver is provided, comprising: the aforementioned water washing detection circuit applied to the shaver.

[0015] The water washing detection circuit applied to the shaver in the embodiment of the present invention includes: a motor driving circuit, a motor access and detection circuit connected to the motor driving circuit, and a water washing access detection circuit connected to the motor access and detection circuit; the water washing access detection circuit includes a first detection contact and a first resistor, the first detection contact is an exposed copper point arranged near the motor interface contact, one end of the first resistor is connected to the first detection contact, and the other end of the first resistor is grounded, which can accurately determine whether the shaver is placed in the cleaning chamber or in water washing, avoiding the risk of misjudgment and misoperation.

[0016] The above description is only an overview of the technical solution of the embodiment of the present invention. In order to more clearly understand the technical means of the embodiment of the present invention, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the embodiment of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. Moreover, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0018] Figure 1 The schematic diagram of the structure of the water washing detection circuit applied to the shaver according to the embodiment of the present invention is shown. DETAILED DESCRIPTION

[0019] The exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present invention and to enable the scope of the present invention to be fully communicated to those skilled in the art.

[0020] Figure 1 FIG. 2 shows a schematic diagram of a water washing detection circuit for a shaver provided by an embodiment of the present invention. Figure 1 As shown, the water washing detection circuit applied to the shaver includes: a motor driving circuit 11, a motor access and detection circuit 12 connected to the motor driving circuit 11, and a water washing access detection circuit 13 connected to the motor access and detection circuit 12; the water washing access detection circuit 13 includes a first detection contact WATER_INPUT and a first resistor R1, the first detection contact WATER_INPUT is an exposed copper point arranged near the motor MOTOR interface contact, one end of the first resistor R1 is connected to the first detection contact WATER_INPUT, and the other end of the first resistor R1 is grounded GND.

[0021] The first detection contact WATER_INPUT is a cleaning chamber access contact. The first resistor R1 is a pull-down resistor of the first detection contact WATER_INPUT. In the case of no water flushing, the state of the first detection contact WATER_INPUT is low. In the case of water flushing, due to the conductivity of water, the first detection contact WATER_INPUT is connected to the first access terminal 1 of the interface contact of the motor MOTOR, and the first detection contact WATER_INPUT is high. That is: when there is no water, the first detection contact WATER_INPUT is low; when water flows through the first detection contact WATER_INPUT and the first access terminal 1 of the interface contact of the motor MOTOR, the first access terminal of the motor interface contact is connected to the first detection contact through the water flow, and the first detection contact WATER_INPUT is high.

[0022] The motor access and detection circuit 12 includes: a motor MOTOR, a second resistor R2, and a motor access detection contact MOTOR_INPUT. The first access terminal of the motor MOTOR is connected to the power supply VBAT, the second access terminal of the motor MOTOR is connected to the motor drive circuit 13, and the motor access detection contact MOTOR_INPUT is the second access terminal 2 of the motor MOTOR, and is grounded GND through the second resistor R2. The second resistor R2 is a pull-down resistor for the 2nd foot of the motor MOTOR. In the case of no motor access, the motor access detection contact MOTOR_INPUT is in a low level state; when the motor is accessed or the motor interface is exposed to water, due to the conductive properties of the motor and water, the voltage of the 1st foot of the motor MOTOR will flow through the motor or water through the 2nd foot of the motor MOTOR, and the state of the motor access detection contact MOTOR_INPUT is a high level. That is: when there is no water and no cleaning chamber access, the motor access detection contact MOTOR_INPUT is low; when there is water or a cleaning chamber access, the motor access detection contact MOTOR_INPUT is high.

[0023] In the embodiment of the present application, the motor access and detection circuit 12 also includes: a first capacitor C1, a second capacitor C2, a third capacitor C3 and a diode D1. The anode of the diode D1 is connected to the second access terminal of the motor MOTOR, and the cathode of the diode D1 is connected to the first access terminal of the motor MOTOR. The second access terminal of the motor MOTOR is also grounded through the first capacitor C1. The second capacitor C2 is connected between the first access terminal and the second access terminal of the motor MOTOR, and the first access terminal of the motor MOTOR is also grounded GND through the third capacitor C3. The diode D1 is a discharge diode, which plays a discharge role when the motor is working. The first capacitor and the third capacitor are 1nF, and the second capacitor is 100nF.

[0024] When the motor MOTOR is connected, the motor connection detection contact MOTOR_INPUT is connected to the power supply VBAT through the motor MOTOR, and the motor connection detection contact MOTOR_INPUT is at a high level. When the motor MOTOR is not connected, the motor connection detection contact MOTOR_INPUT is at a low level.

[0025] In the embodiment of the present application, the motor drive circuit 11 includes: a switch tube Q1, a third resistor R3, a fourth resistor R4 and a fifth resistor R5; the first end of the switch tube Q1 is connected to the motor drive signal MTCTR through the fourth resistor R4, and is also connected to the ground GND through the fifth resistor R5, the second end of the switch tube Q1 is connected to the motor access and detection circuit 12, and the third end of the switch tube Q1 is connected to the ground GND through the third resistor R3.

[0026] The motor driving circuit 11 further includes a sixth resistor R6 and a fourth capacitor C4. One end of the sixth resistor R6 is connected to the third end of the switch tube Q1, and the other end is connected to the outside for current detection. The other end of the sixth resistor R6 is also grounded GND through the fourth capacitor C4.

[0027] The motor driving circuit 11 can perform corresponding operations on the detection results after the detection of the water washing access detection circuit 13 and the motor access and detection circuit 12. That is, when the motor access detection contact MOTOR_INPUT and the first detection contact WATER_INPUT are both high, it is judged to be a water washing state, and no driving operation is performed on the motor; when the motor access detection contact MOTOR_INPUT and the first detection contact WATER_INPUT are both low, it is judged to be a waterless washing and not connected to the washing chamber state, and the motor driving circuit 11 does not perform any driving operation on the motor; when the motor access detection contact MOTOR_INPUT is high and the first detection contact WATER_INPUT is low, it is judged to be in the washing chamber state, and the circuit performs corresponding driving operations on the motor.

[0028] Optionally, the switch tube Q1 is an NMOS tube, the first end is a gate, the second end is a drain, and the third end is a source.

[0029] In the water washing detection circuit applied to the shaver in the embodiment of the present application, the motor access and detection circuit 12 is used to perform motor access detection and judgment on the motor access detection contact MOTOR_INPUT, so as to distinguish between the situations of no water and no motor access and with water and motor access; the water washing access detection circuit 13 is used to perform water washing access detection on the first detection contact WATER_INPUT, that is, a secondary judgment is made on whether there is water flushing, and together with the motor access and detection circuit 12, it can realize the distinction between the three states of no water, water, and entering the cleaning chamber; the motor drive circuit 11 is an operating circuit, which performs corresponding operations on the circuit based on the judgment of the motor access and detection circuit 12 and the water washing access detection circuit 13.

[0030] To summarize, the water washing detection circuit applied to the shaver in the embodiment of the present application includes: a motor drive circuit, a motor access and detection circuit connected to the motor drive circuit, and a water washing access detection circuit connected to the motor access and detection circuit; the water washing access detection circuit includes a first detection contact and a first resistor, the first detection contact is an exposed copper point arranged near the motor interface contact, one end of the first resistor is connected to the first detection contact, and the other end of the first resistor is grounded, which can accurately determine whether the shaver is placed in the cleaning chamber or in water washing, thereby avoiding the risk of misjudgment and misoperation.

[0031] Based on the same concept, an embodiment of the present invention further provides a shaver, which includes the aforementioned water washing detection circuit applied to the shaver.

[0032] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present disclosure is limited to these examples. Based on the concept of the present disclosure, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the embodiments of the present invention as described above, which are not provided in detail for the sake of simplicity.

[0033] This application is intended to cover all such substitutions, modifications and variations that fall within the broad scope of all embodiments. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the embodiments of the present invention should be included in the scope of protection of this disclosure.

Claims

1. A water washing detection circuit for a shaver, characterized in that: The water washing detection circuit includes: a motor driving circuit, a motor access and detection circuit connected to the motor driving circuit, and a water washing access detection circuit connected to the motor access and detection circuit; the water washing access detection circuit includes a first detection contact and a first resistor, the first detection contact is an exposed copper point arranged near the motor interface contact, one end of the first resistor is connected to the first detection contact, and the other end of the first resistor is grounded.

2. The water washing detection circuit according to claim 1, characterized in that: When water flows through the first detection contact and the first access end of the motor interface contact, the first access end of the motor interface contact is connected to the first detection contact through the water flow, and the first detection contact is at a high level.

3. The water washing detection circuit according to claim 1, characterized in that: The motor access and detection circuit includes: a motor, a second resistor and a motor access detection contact; the first access end of the motor is connected to a power supply, the second access end of the motor is connected to the motor drive circuit, the motor access detection contact is the second access end of the motor, and is grounded through the second resistor.

4. The water washing detection circuit according to claim 3, characterized in that: The motor access and detection circuit also includes: a first capacitor, a second capacitor, a third capacitor and a diode; the anode of the diode is connected to the second access end of the motor, and the cathode of the diode is connected to the first access end of the motor; the second access end of the motor is also grounded through the first capacitor; the second capacitor is connected between the first access end and the second access end of the motor, and the first access end of the motor is also grounded through the third capacitor.

5. The water washing detection circuit according to claim 4, characterized in that: The first capacitor and the third capacitor are 1 nF, and the second capacitor is 100 nF.

6. The water washing detection circuit according to claim 3, characterized in that: When the motor is turned on, the motor connection detection contact is connected to the power supply through the motor, and the motor connection detection contact is at a high level.

7. The water washing detection circuit according to claim 1, characterized in that: The motor drive circuit includes: a switch tube, a third resistor, a fourth resistor and a fifth resistor; the first end of the switch tube is connected to the motor drive signal through the fourth resistor, and is also grounded through the fifth resistor, the second end of the switch tube is connected to the motor access and detection circuit, and the third end of the switch tube is grounded through the third resistor.

8. The water washing detection circuit according to claim 7, characterized in that: The motor drive circuit also includes: a sixth resistor and a fourth capacitor; one end of the sixth resistor is connected to the third end of the switch tube, and the other end is connected to the outside for current detection, and the other end of the sixth resistor is also grounded through the fourth capacitor.

9. The water washing detection circuit according to claim 7, characterized in that: The switch tube is an NMOS tube, the first end is a gate, the second end is a drain, and the third end is a source.

10. A razor, characterized in that: The shaver comprises a water washing detection circuit applied to a shaver according to any one of claims 1 to 9.

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