Beauty instrument

Abstract

The utility model relates to the field of beauty instruments, and provides a beauty instrument. The beauty instrument comprises a host and a beauty accessory detachably connected with the host. Wherein the host is configured with a first contact unit, and the beauty accessory is configured with a second contact unit and an accessory circuit. The second contact unit can be matched with the first contact unit to form electric connection when the beauty accessory is carried on the host, so that the host can supply power to an accessory circuit through an access formed by the first contact unit and the second contact unit. The sampling voltage is compared with the short-circuit threshold voltage through the control unit, when the sampling voltage is equal to or larger than the short-circuit threshold voltage, it can be determined that the accessory circuit is short-circuited, and the loop switch unit is used for disconnecting the access between the first contact unit and the ground, so that the power supply loop between the host and the beauty accessory is disconnected, and short-circuit protection is achieved; therefore, the beauty instrument host is prevented from being damaged due to short-circuit faults of beauty accessories.

Description

Technical Field

[0001] The present application belongs to the field of skin treatment equipment, and in particular to a beauty instrument. Background Art

[0002] Beauty devices can be used to improve the condition of human skin. As people's demand for improving skin becomes more and more, beauty devices with replaceable beauty accessories have appeared on the market. For example, the main unit and beauty accessories of the beauty device are detachable, and users can replace beauty accessories with different functions for skin care according to their needs. For example, beauty accessories that output microcurrent, beauty accessories that output light, etc.

[0003] However, the detachable nature of the beauty accessory from the main unit increases the risk of damage to the beauty accessory. In the event of a short circuit in the accessory circuit, if the beauty accessory is installed in the main unit for use, it is easy to damage the main unit of the beauty instrument, affecting the service life of the beauty instrument. Utility Model Content

[0004] The purpose of this application is to provide a control for a beauty instrument, aiming to solve the above problem of affecting the service life of the beauty instrument due to failure of beauty accessories.

[0005] The embodiment of the present application provides a beauty instrument, including:

[0006] A host computer is configured with a first contact unit;

[0007] The beauty accessory detachably connected to the main unit is configured with a second contact unit and an accessory circuit, and the second contact unit is used to cooperate with the first contact unit to form an electrical connection when the beauty accessory is mounted on the main unit;

[0008] The host includes:

[0009] an electric energy output unit connected to the first contact unit, and configured to output working power to the first contact unit according to a power supply instruction, so as to transfer the working power to the accessory circuit through the second contact unit;

[0010] The circuit switch unit is configured with a first connection end, a second connection end, a controlled end and a first sampling end, the first connection end is used to connect the first contact unit, and the second connection end is grounded; the circuit switch unit is used to disconnect the path between the first contact unit and the ground according to the short-circuit protection signal, so as to disconnect the power supply circuit between the main unit and the beauty accessory;

[0011] A sampling unit, connected to the first sampling terminal, and used to sample the voltage of the first sampling terminal to obtain a sampled voltage;

[0012] The control unit has one end connected to the power output unit and the other end connected to the controlled end. The control unit is used to output a power supply instruction to the power output unit and output a short-circuit protection signal to the loop switch unit when the sampling voltage is equal to or greater than the short-circuit threshold voltage.

[0013] Compared with the prior art, the embodiment of the utility model has the following beneficial effects: the beauty instrument includes a main unit and a beauty accessory detachably connected to the main unit. The main unit is configured with a first contact unit, and the beauty accessory is configured with a second contact unit and an accessory circuit. Since the second contact unit can form an electrical connection with the first contact unit when the beauty accessory is mounted on the main unit, the main unit can supply power to the accessory circuit through the path formed by the first contact unit and the second contact unit. The main unit includes an electric energy output unit, a loop switch unit, a sampling unit and a control unit. The electric energy output unit is connected to the first contact unit. The loop switch unit is configured with a first connection end, a second connection end, a controlled end and a first sampling end, the first connection end is used to connect the first contact unit, and the second connection end is grounded. The sampling unit can sample the voltage of the first sampling end by connecting to the first sampling end to obtain a sampled voltage. One end of the control unit is connected to the electric energy output unit, and the other end is connected to the controlled end. In the above scheme, the control unit is used to output a power supply instruction to the power output unit, so that the power output unit can output working electricity to the first contact unit according to the power supply instruction, and then transmit the working electricity to the accessory circuit through the second contact unit. Since the first connection end of the loop switch unit is used to connect the first contact unit, and the second connection end is grounded, a closed loop of working electricity is formed. Therefore, the sampling unit is used to sample the voltage of the first sampling end of the loop switch unit, and the obtained sampling voltage can be used to reflect the short circuit condition of the accessory circuit. The control unit compares the sampling voltage with the short circuit threshold voltage. When the sampling voltage is equal to or greater than the short circuit threshold voltage, it can be determined that the accessory circuit is short-circuited, and then a short circuit protection signal is output to the loop switch unit, so that the loop switch unit can disconnect the path between the first contact unit and the ground according to the short circuit protection signal, thereby disconnecting the power supply circuit between the host and the beauty accessories to achieve short circuit protection. In this way, even if a short circuit occurs in the accessory circuit of a beauty accessory, installing the beauty accessory in the host for use can disconnect the power supply circuit between the host and the beauty accessory to achieve short circuit protection. This can not only prevent the beauty instrument host from being damaged due to a short circuit failure of the beauty accessory, but also ensure the safety of the use of the beauty instrument. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 A schematic diagram of the structure of a beauty instrument provided in an embodiment of the present application;

[0015] Figure 2 A schematic diagram of the specific structure of the beauty instrument provided in the embodiment of the present application;

[0016] Figure 3 A schematic diagram of the specific structure of a loop switch unit in a beauty instrument provided in an embodiment of the present application;

[0017] Figure 4 A specific circuit diagram of the host in the beauty instrument provided in the embodiment of the present application;

[0018] Figure 5 A specific circuit diagram of the accessory circuit in the beauty instrument provided in the embodiment of the present application Figure 1 ;

[0019] Figure 6 A specific circuit diagram of the accessory circuit in the beauty instrument provided in the embodiment of the present application Figure 2 . DETAILED DESCRIPTION

[0020] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0021] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0022] It should be understood that the orientation or position relationship indicated by terms such as "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0023] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0024] For example, the existing beauty instrument can realize the detachable setting of the main unit and beauty accessories. Users can replace beauty accessories with different functions for skin care according to their needs. For example, beauty accessories that output microcurrent, beauty accessories that output light, etc.

[0025] However, the detachable nature of the beauty accessory from the main unit increases the risk of damage to the beauty accessory. In the event of a short circuit in the accessory circuit, if the beauty accessory is installed in the main unit for use, it is easy to damage the main unit of the beauty instrument, affecting the service life of the beauty instrument.

[0026] In order to solve the above technical problems, an embodiment of the present application provides a beauty instrument, including a host, and a beauty accessory detachably connected to the host. The host is configured with a first contact unit, and the beauty accessory is configured with a second contact unit and an accessory circuit. Since the second contact unit can cooperate with the first contact unit to form an electrical connection when the beauty accessory is mounted on the host, the host can supply power to the accessory circuit through the path formed by the first contact unit and the second contact unit. The host includes an electric energy output unit, a loop switch unit, a sampling unit and a control unit. The electric energy output unit is connected to the first contact unit. The loop switch unit is configured with a first connection end, a second connection end, a controlled end and a first sampling end, the first connection end is used to connect the first contact unit, and the second connection end is grounded. The sampling unit can sample the voltage of the first sampling end by connecting to the first sampling end to obtain a sampled voltage. One end of the control unit is connected to the electric energy output unit, and the other end is connected to the controlled end. In the above scheme, the control unit is used to output a power supply instruction to the power output unit, so that the power output unit can output working electricity to the first contact unit according to the power supply instruction, and then transmit the working electricity to the accessory circuit through the second contact unit. Since the first connection end of the loop switch unit is used to connect the first contact unit, and the second connection end is grounded, a closed loop of working electricity is formed. Therefore, the sampling unit is used to sample the voltage of the first sampling end of the loop switch unit, and the obtained sampling voltage can be used to reflect the short circuit condition of the accessory circuit. The control unit compares the sampling voltage with the short circuit threshold voltage. When the sampling voltage is equal to or greater than the short circuit threshold voltage, it can be determined that the accessory circuit is short-circuited, and then a short circuit protection signal is output to the loop switch unit, so that the loop switch unit can disconnect the path between the first contact unit and the ground according to the short circuit protection signal, thereby disconnecting the power supply circuit between the host and the beauty accessories to achieve short circuit protection. In this way, even if a short circuit occurs in the accessory circuit of a beauty accessory, installing the beauty accessory in the host for use can disconnect the power supply circuit between the host and the beauty accessory to achieve short circuit protection. This can not only prevent the beauty instrument host from being damaged due to a short circuit failure of the beauty accessory, but also ensure the safety of the use of the beauty instrument.

[0027] See also Figure 1 , Figure 1 The structure diagram of the beauty instrument provided by the embodiment of the present application is shown. For the convenience of explanation, only the parts related to the present embodiment are shown, which are described in detail as follows:

[0028] exist Figure 1 In the embodiment, the beauty instrument 100 includes: a main unit 110, and a beauty accessory 120 detachably connected to the main unit 110. Specifically:

[0029] The host 110 is provided with a first contact unit 10 .

[0030] The beauty accessory 120 is configured with a second contact unit 20 and an accessory circuit 1201 . The second contact unit 20 is used to cooperate with the first contact unit 10 to form an electrical connection when the beauty accessory 120 is mounted on the host 110 .

[0031] exist Figure 1 In the embodiment, the host 110 includes: an energy output unit 30, a loop switch unit 40, a sampling unit 50 and a control unit 60. The energy output unit 30 is connected to the first contact unit 10, and is used to output working electricity to the first contact unit 10 according to the power supply instruction, so as to transfer the working electricity to the accessory circuit 1201 through the second contact unit 20. The loop switch unit 40 is configured with a first connection terminal 41, a second connection terminal 42, a controlled terminal 43 and a first sampling terminal 44, wherein the first connection terminal 41 is used to connect the first contact unit 10, and the second connection terminal 42 is grounded. The loop switch unit 40 is used to disconnect the path between the first contact unit 10 and the ground according to the short-circuit protection signal, so as to disconnect the power supply circuit between the host 110 and the beauty accessory 120. The sampling unit 50 is connected to the first sampling terminal 44, and is used to sample the voltage of the first sampling terminal 44 to obtain the sampled voltage. The control unit 60 is connected to the energy output unit 30 at one end, and connected to the controlled terminal 43 at the other end. The control unit 60 is used to output a power supply instruction to the power output unit 30 , and output a short-circuit protection signal to the loop switch unit 40 when the sampling voltage is equal to or greater than the short-circuit threshold voltage.

[0032] In this embodiment, the first contact unit 10 and the second contact unit 20 cooperate with each other to form a contact unit for an electrical circuit between the host 110 and the beauty accessory 120. When the beauty accessory 120 is installed on the host 110, the first contact unit 10 and the second contact unit 20 contact each other to form an electrical connection. The accessory circuit 1201 is a functional circuit carried by the beauty accessory 120, which is used to output a certain physical energy to act on the skin. For example, outputting microcurrent to act on the skin, outputting light to irradiate the skin, outputting atomized / vaporized essence to act on, driving microneedles to stimulate the skin, etc.

[0033] In a specific implementation, the first contact unit 10 and the second contact unit 20 can both be metal terminals that cooperate with each other. For example, the first contact unit 10 can be a metal column, and the second contact unit 20 can be a metal electrode. When the beauty accessory 120 is mounted on the host 110, the metal column and the metal electrode cooperate with each other to form an electrical connection. The accessory circuit 1201 can be set according to the functional requirements of the beauty accessory.

[0034] For example, the accessory circuit 1201 may specifically be a micro-current output circuit including contact electrodes, which may output micro-current to the skin.

[0035] For another example, the accessory circuit 1201 may specifically be a lighting circuit including a light source, which can output light of different wavelengths and / or different colors to the skin.

[0036] For example, the accessory circuit 1201 may include an atomization / vaporization circuit, which can atomize / vaporize the skin care liquid carried, thereby acting on the skin. At the same time, the accessory circuit 1201 may also include a motor drive circuit, which can generate kinetic energy to drive the microneedle module to reciprocate, thereby stimulating the skin.

[0037] like Figure 1 As shown, the power output unit 30 is connected to the first contact unit 10 and the control unit 60 respectively. When the power output unit 30 receives the power supply instruction sent by the control unit 60, the power output unit 30 outputs working power to the first contact unit 10, so as to transfer the working power to the accessory circuit 1201 through the second contact unit 20.

[0038] In a specific implementation, the power output unit 30 may specifically be a power supply circuit including a battery.

[0039] As an example, the power output unit 30 may include a battery, a voltage conversion circuit, and a micro-current output circuit. Here, the battery provides direct current, and the voltage conversion circuit converts the direct current to output a corresponding bias voltage, and then the micro-current output circuit raises the voltage range of the preset PWM electrical signal based on the bias voltage, thereby outputting working electricity with a DC bias.

[0040] As another example, the power output unit 30 may include an adapter, a voltage conversion circuit, and a micro-current output circuit. Here, the adapter may be connected to the AC power, and output the DC power after rectifying the AC power, and then the DC power is converted by the voltage conversion circuit to output the corresponding bias voltage, and finally the micro-current output circuit is used to raise the voltage range of the preset PWM electrical signal based on the bias voltage, and then output the working power with DC bias.

[0041] It is understandable that in other embodiments, the power output unit 30 may also be other existing circuits capable of outputting microcurrent as working power, or other circuits capable of outputting direct current with a DC bias as working power, which will not be elaborated here.

[0042] In this embodiment, the loop switch unit 40 is configured with a first connection terminal 41, a second connection terminal 42, a controlled terminal 43 and a first sampling terminal 44. The first connection terminal 41 is used to connect the first contact unit 10, and the second connection terminal 42 is grounded. Figure 1 As described above, since the first connection terminal 41 of the loop switch unit 40 is connected to the first contact unit 10 and the second connection terminal 42 is grounded, when the working power is output to the accessory circuit 1201 through the first contact unit 10, the current of the working power can flow to the ground through the second contact unit 20, the first contact unit 10 and the loop switch unit 40, thereby forming a current loop. Here, since the loop switch unit 40 constitutes the current loop when the accessory circuit 1201 is working, the sampled voltage obtained by sampling the voltage of the first sampling terminal 44 of the loop switch unit 40 can reflect the working condition of the accessory circuit 1201 to a certain extent. For example, when the accessory circuit 1201 is working normally, the voltage of the working power must be attenuated to a certain extent after being divided by the circuits such as the accessory circuit 1201. If the sampled voltage obtained by sampling the voltage of the first sampling terminal 44 is greater than the voltage of the working power, it can be determined that the accessory circuit 1201 has a short circuit. Here, the control unit 60 may be used to compare the sampled voltage with the short-circuit threshold voltage. When the sampled voltage is equal to or greater than the short-circuit threshold voltage, it may be determined that the accessory circuit 1201 is short-circuited. In this case, the control unit 60 outputs a short-circuit protection signal to the circuit switch unit 40, so that the circuit switch unit 40 may disconnect the path between the first contact unit 10 and the ground according to the short-circuit protection signal, thereby disconnecting the power supply circuit between the host 110 and the beauty accessory 120, thereby achieving short-circuit protection.

[0043] In specific implementation, since the loop switch unit 40 has an electronically controlled switch function, the corresponding switch circuit can be built using existing electronic switches, switch tubes and other electronically controlled switches. The sampling unit 50 is used to sample the voltage of the first sampling terminal 44 of the loop switch unit 40 to obtain a sampled voltage. Specifically, it can be implemented using an existing sampling circuit. For example, a sampling circuit composed of a sampling resistor and an operational amplifier is used to implement it.

[0044] In the above scheme, the control unit is used to output a power supply instruction to the power output unit, so that the power output unit can output working electricity to the first contact unit according to the power supply instruction, and then transmit the working electricity to the accessory circuit through the second contact unit. Since the first connection end of the loop switch unit is used to connect the first contact unit, and the second connection end is grounded, a closed loop of working electricity is formed. Therefore, the sampling unit is used to sample the voltage of the first sampling end of the loop switch unit, and the obtained sampling voltage can be used to reflect the short circuit condition of the accessory circuit. The control unit compares the sampling voltage with the short circuit threshold voltage. When the sampling voltage is equal to or greater than the short circuit threshold voltage, it can be determined that the accessory circuit is short-circuited, and then a short circuit protection signal is output to the loop switch unit, so that the loop switch unit can disconnect the path between the first contact unit and the ground according to the short circuit protection signal, thereby disconnecting the power supply circuit between the host and the beauty accessories to achieve short circuit protection. In this way, even if a short circuit occurs in the accessory circuit of a beauty accessory, installing the beauty accessory in the host for use can disconnect the power supply circuit between the host and the beauty accessory to achieve short circuit protection. This can not only prevent the beauty instrument host from being damaged due to a short circuit failure of the beauty accessory, but also ensure the safety of the use of the beauty instrument.

[0045] See also Figure 2 , Figure 2 The specific structural diagram of the beauty instrument provided in the embodiment of the present application is shown. Figure 2 As shown, as an embodiment, the first contact unit 10 includes a power supply contact 11 and a loop contact 12. The power supply contact 11 is used to connect the power output unit 30, and the loop contact 12 is used to connect the first connection end 41 of the loop switch unit 40.

[0046] exist Figure 2 In the embodiment, the circuit switch unit 40 further includes a second sampling terminal 45, and the second sampling terminal 45 is used to connect to the control unit 60. The control unit 60 is also used to output a standby instruction to the power output unit 30, perform voltage sampling on the second sampling terminal 45 to obtain an in-situ sampling voltage, and output a second control signal to the circuit switch unit 40 when it is determined that the beauty accessory 120 is mounted on the host 110 according to the in-situ sampling voltage. The power output unit 30 is also used to output an in-situ detection signal to the power supply contact 11 according to the standby instruction. The circuit switch unit 40 is used to conduct the path between the circuit contact 12 and the ground according to the second control signal, so that the power supply circuit between the host 110 and the beauty accessory 120 is conducted.

[0047] In this embodiment, when the host 110 is equipped with the beauty accessory 120, the power output unit 30 and the loop switch unit 40 in the host 110 can form an electrical connection through the power supply contact 11 and the loop contact 12 of the first contact unit 10, and the second contact unit 20 of the beauty accessory 120.

[0048] For example, when the host 110 is not equipped with the beauty accessory 120, the control unit 60 can be used to output a standby instruction to the power output unit 30. At this time, the power output unit 30 can output a presence detection signal to the power supply contact 11 according to the standby instruction. For example, the presence detection signal can be a periodic presence detection voltage.

[0049] In this example, when the user installs the beauty accessory 120 on the host 110, the power supply contact 11 and the loop contact 12 are electrically connected to the second contact unit 20, that is, the in-situ detection voltage forms a connection path with the second contact unit 20 via the power supply contact 11 and the loop contact 12, and is transmitted to the loop switch unit 40. At this time, the control unit 60 samples the voltage of the second sampling terminal 45 of the loop switch unit 40 to obtain the in-situ sampling voltage. Then, it can be determined based on the in-situ sampling voltage that the beauty accessory 120 is mounted on the host 110, and the control unit 60 outputs a second control signal to the loop switch unit 40. According to the second control signal, the loop switch unit 40 conducts the path between the loop contact 12 and the ground, so that the power supply loop between the host 110 and the beauty accessory 120 is conducted.

[0050] like Figure 2 As described above, as an embodiment, the second contact unit 20 includes a first connection contact 21 and a second connection contact 22. The accessory circuit 1201 is coupled to the first connection contact 21 and the second connection contact 22, respectively.

[0051] The first connection contact 21 is used to form an electrical connection with the power supply contact 11 when the beauty accessory 120 is mounted on the host 110. The second connection contact 22 is used to form an electrical connection with the loop contact 12 when the beauty accessory 120 is mounted on the host 110.

[0052] In this embodiment, when the host 110 is equipped with the beauty accessory 120, the power output unit 30 and the circuit switch unit 40 in the host 110 can be electrically connected to the accessory circuit 1201 through the first contact unit 10 and the second contact unit 20. Specifically, when the host 110 is equipped with the beauty accessory 120, the power supply contact 11 is electrically connected to the first connection contact 21, and the circuit contact 12 is electrically connected to the second connection contact 22.

[0053] For example, when the host 110 is not equipped with the beauty accessory 120, the control unit 60 can be used to output a standby instruction to the power output unit 30. At this time, the power output unit 30 can output a presence detection signal to the power supply contact 11 according to the standby instruction. For example, the presence detection signal can be a periodic presence detection voltage.

[0054] In this example, when the user installs the beauty accessory 120 on the host 110, the power supply contact 11 and the first connection contact 21 are electrically connected, that is, the in-situ detection voltage is transmitted to the accessory circuit 1201 via the power supply contact 11 and the first connection contact 21, and then returned to the loop switch unit 40 via the second connection contact 22 and the loop contact 12. At this time, the control unit 60 samples the voltage of the second sampling terminal 45 of the loop switch unit 40 to obtain the in-situ sampling voltage. Then, it can be determined based on the in-situ sampling voltage that the beauty accessory 120 is mounted on the host 110, and the control unit 60 outputs a second control signal to the loop switch unit 40. According to the second control signal, the loop switch unit 40 conducts the path between the loop contact 12 and the ground, so that the power supply loop between the host 110 and the beauty accessory 120 is conductive.

[0055] In a specific implementation, the loop switch unit 40 may include multiple branches, for example, a sampling branch associated with the second sampling terminal 45, a grounding branch for connecting the loop contact 12 to the ground, and the like.

[0056] For example, the sampling branch in the loop switch unit 40 can be turned on by default. When the user installs the beauty accessory 120 on the host 110, the control unit 60 can perform voltage sampling on the second sampling terminal 45 of the loop switch unit 40 to obtain an in-situ sampling voltage. The control unit 60 determines that the beauty accessory 120 is mounted on the host 110 according to the in-situ sampling voltage, and outputs a second control signal to the loop switch unit 40. The loop switch unit 40 turns on the path between the loop contact 12 and the ground according to the second control signal.

[0057] Figure 3 The specific structural diagram of the loop switch unit in the beauty instrument provided in the embodiment of the present application is shown. Figure 3 As shown, as an embodiment, the loop switch unit 40 includes: a switch branch 401 and a detection branch 402. Specifically:

[0058] The first end of the switch branch 401 is connected to the first end of the detection branch 402 to form a first node P1, which serves as the first connection end 41. The second end of the switch branch 401 is connected to the second end of the detection branch 402 to form a second node P2, which serves as the second connection end 42. The controlled end of the switch branch 401 serves as the controlled end 43 of the loop switch unit 40. The path sampling node of the switch branch 401 serves as the first sampling end 44 of the loop switch unit 40. The middle node of the detection branch 402 serves as the second sampling end 45 of the loop switch unit 40.

[0059] In this embodiment, the switch branch 401 and the detection branch 402 are connected in parallel between the loop contact 12 and the ground. Since the detection branch 402 conducts the path between the loop contact 12 and the ground by default, when the power output unit 30 outputs the in-situ detection signal to the power supply contact 11 according to the standby instruction, and when the user installs the beauty accessory 120 on the host 110, since the power supply contact 11 and the first connection contact 21 are electrically connected, the in-situ detection voltage is transmitted to the accessory circuit 1201 via the power supply contact 11 and the first connection contact 21, and then returned to the detection branch 402 via the second connection contact 22 and the loop contact 12. At this time, the control unit 60 samples the voltage of the second sampling terminal 45 of the loop switch unit 40, that is, samples the voltage of the intermediate node of the detection branch 402, and can sample to obtain the in-situ sampling voltage. The control unit 60 can determine that the beauty accessory 120 is mounted on the host 110 based on the in-situ sampling voltage, and then output the second control signal to the loop switch unit 40. The switch branch 401 in the loop switch unit 40 conducts the path between the loop contact 12 and the ground according to the second control signal. At this time, the detection branch 402 is short-circuited by the conducted switch branch 401, and the operating voltage output by the host 110 through the power supply contact 11 is output to the accessory circuit 1201 through the first connection contact 21, and then grounded through the second connection contact 22, the loop contact 12 and the switch branch 401, forming a closed loop.

[0060] Figure 4 FIG. 2 shows a specific circuit diagram of the host in the beauty instrument provided in the embodiment of the present application. Figure 4 As shown, as an example,

[0061] The switch branch 401 includes: a first resistor R1, a second resistor R2 and a switch tube Q1. The first end of the first resistor R1 serves as the first connection end 41 of the switch branch 401, the second end of the first resistor R1 is connected to the high potential end of the switch tube Q1, the controlled end of the switch tube Q1 serves as the controlled end 43 of the switch branch, the node P3 formed by the low potential end of the switch tube Q1 and the first end of the second resistor R2 is connected as the path sampling node 44 (that is, the first sampling end 44 of the loop switch unit 40), and the second end of the second resistor R2 is grounded.

[0062] The detection branch 402 includes: a third resistor R3 and a fourth resistor R4. The third resistor R3 is connected to the first end of the first resistor R1, and the second end of the third resistor R3 is connected to the first end of the fourth resistor R4 to form a node P4, which serves as an intermediate node of the detection branch 402, that is, the second sampling end 45 of the loop switch unit 40, and the second end of the fourth resistor R4 is grounded.

[0063] like Figure 4 As shown, as an example, the control unit 60 may include a control chip U1. Figure 4In the embodiment, the control chip U1 includes a position detection terminal HAT_ID, a switch enable terminal HEAT_EN and a data transmission terminal ADC_IO.

[0064] Based on the above example, when the beauty accessory 120 is not connected to the host 110, the host 110 is in a standby state, and the control unit 60 can output a standby instruction to the power output unit 30, and the power output unit 30 outputs a presence detection signal to the power supply contact 11 according to the standby instruction. For example, a 4.5V voltage is periodically output to detect whether the beauty accessory 120 is connected. When the beauty accessory 120 is not connected to the host 110, since the loop contact 12 does not input a signal, and the third resistor R3 and the fourth resistor R4 are connected in series, and the resistance values ​​of the two are relatively large, the presence sampling voltage sampled by the presence detection terminal HAT_ID of the control chip U1 is lower than the presence threshold voltage. At this time, the control chip U1 determines that the beauty accessory 120 is not connected to the host 110. When the beauty accessory 120 is connected to the host 110, since the accessory circuit 1201 is provided in the beauty accessory 120, that is, the accessory circuit 1201 is connected in parallel with the series branch formed by the third resistor R3 and the fourth resistor R4, at this time, the voltage V collected by the in-position detection terminal HAT_ID of the control chip U1 HEAT_ID It can be expressed as: V HEAT_ID =4.5*R4 / (R4+R3+R1201) wherein R4 is the resistance value of the fourth resistor R4, R3 is the resistance value of the third resistor R3, and R1201 is the equivalent resistance value of the accessory circuit 1201.

[0065] In this example, assuming that the in-position threshold voltage is 0.5V, the resistance value of the fourth resistor R4 is 10KΩ, the resistance value of the third resistor R3 is 56KΩ, and the equivalent resistance value of the accessory circuit 1201 is 40Ω, at this time, the voltage V collected by the in-position detection terminal HAT_ID of the control chip U1 is HEAT_ID =4.5V*10KΩ / (10KΩ+56KΩ+40Ω)≈0.68V. That is, the in-situ sampling voltage 0.68V is higher than the threshold voltage 0.5V, and at this time, it can be determined that the beauty accessory 120 is connected to the host 110.

[0066] At this time, the control chip U1 enters the working state and outputs a power supply instruction to the power output unit 30. The power output unit 30 outputs working power to the power supply contact 11 according to the power supply instruction. At the same time, the switch enable terminal HEAT_EN of the control chip U1 outputs a high level. At this time, the loop contact 12 is at a high level under the action of the working power, so the control switch tube Q1 is turned on. Here, since the impedance of the detection branch 402 is greater than the impedance of the switch branch 401, the detection branch 402 is short-circuited. The current passing through the loop contact 12 flows to the ground via the switch branch 401.

[0067] exist Figure 4In the example, the node P3 formed by connecting the low potential end of the switch tube Q1 and the first end of the second resistor R2 serves as the path sampling node, that is, the first sampling end 44 of the loop switch unit 40. The sampling unit 50 can sample the voltage of the first sampling end 44 by connecting to the first sampling end 44 to obtain the sampling voltage. Here, when the switch branch 401 is turned on, it means that the host 110 is already providing working power to the beauty accessory 120, so the voltage at the first sampling end 44 at this time can be used to characterize the fault condition of the accessory circuit 1201. Because when a short circuit fault occurs in the accessory circuit 1201, it is equivalent to no load being connected to the loop, and the voltage at the first sampling end 44 is greater than the sampling voltage when the accessory circuit 1201 is working normally. Therefore, by configuring the short circuit threshold voltage and comparing it with the sampling voltage, it can be determined whether a short circuit fault occurs in the accessory circuit 1201.

[0068] like Figure 4 As shown, as an embodiment, the sampling unit 50 includes: a fifth resistor R5, a sixth resistor R6, a seventh resistor R7 and an amplifier U2. The fifth resistor R5 is coupled to the inverting input terminal -in of the amplifier U2 and the ground, the first end of the sixth resistor R6 is connected to the positive input terminal +in of the amplifier U2, the second end of the sixth resistor R6 is connected to the first sampling terminal 44, the first end of the seventh resistor R7 is connected to the inverting input terminal -in of the amplifier U2, the second end of the seventh resistor R7 is connected to the output terminal out of the amplifier U2, and the output terminal out of the amplifier U2 is used to output the sampling voltage to the control unit 60.

[0069] In this embodiment, the sixth resistor R6 is used as a sampling resistor to sample the voltage of the first sampling terminal 44 and transmit it to the positive input terminal +in of the amplifier U2, and the amplifier U2 amplifies it by multiples. For example, the sampled voltage value can be amplified by 3 times, 4 times, etc.

[0070] For example, it is assumed that the voltage value of the working voltage is 10V, that is, the maximum voltage of the power supply contact 11 to the ground is 10V. The short-circuit threshold voltage is 3.5V. In addition, the resistance value of the first resistor R1 and the resistance value of the second resistor R2 are both 2Ω, and the local impedance of the accessory circuit 1201 is 40R. When the control chip U1 controls the switch tube Q1 to turn on, the accessory circuit 1201 starts to work according to the working voltage.

[0071] Based on the above example, in one example, when the accessory circuit 1201 works normally, the voltage V of the first sampling terminal 44 to the ground is 44正常=10V*R2 / (R2+R1+R1201)=10V*2Ω / (2Ω+2Ω+40Ω)=0.45V. Here, the voltage value can be amplified by 4 times by amplifier U2, and the sampled voltage is 1.8V, which is less than the short-circuit threshold voltage.

[0072] Based on the above example, in another example, when the accessory circuit 1201 is short-circuited, the voltage V of the first sampling terminal 44 to the ground is 44短路 =10V*R2 / (R2+R1)=10V*2Ω / (2Ω+2Ω)=5V. Here, since the maximum supply voltage of amplifier U2 is 5V and the maximum output voltage is 3.5V, when the accessory circuit 1201 is short-circuited, the amplifier U2 limits the output voltage, thus protecting the data transmission terminal ADC_IO of the control chip U1 and preventing the pin of the data transmission terminal ADC_IO from being burned by a higher voltage. At this time, V outputted through the output terminal of amplifier U2 44短路 The maximum output voltage of the amplifier U2 is 3.5V, which is equal to the short-circuit threshold voltage of 3.5V. At this time, the control chip U1 outputs a short-circuit protection signal to the loop switch unit 40, that is, outputs a low level to the controlled end of the switch tube Q1 to control the switch tube Q1 to turn off.

[0073] Here, since the switch tube Q1 is turned off, the switch branch 401 is in an open circuit state. Since the detection branch 402 is turned on by default, but its impedance is relatively high, the in-position sampling voltage can be detected through the second sampling terminal 45, and the current flowing through the accessory circuit 1201 is almost 0, so the accessory circuit 1201 is in a stopped working state.

[0074] It is easy to understand that, in a specific implementation, the accessory circuit 1201 can be implemented using a DC load circuit. For example, the accessory circuit 1201 can include at least one of a micro-current output circuit, a lighting circuit, an atomization / vaporization circuit, and a heating circuit.

[0075] Figure 5 The specific circuit diagram of the accessory circuit in the beauty instrument provided in the embodiment of the present application is shown. Figure 1 .like Figure 6 As shown, as an embodiment, the accessory circuit 1201 includes:

[0076] The heating film 12011 is coupled between the first connection contact 21 and the second connection contact 22, and the heating film 12011 is used to output heat according to the working electricity.

[0077] In specific implementation, the heating film 12011 can also be replaced by an electric heating element such as a heating sheet. In order to transfer the heat output by the heating film 12011 to the skin, a contact electrode exposed to the beauty accessory 120 can also be configured in the accessory circuit 1201. By attaching the heating film 12011 to the inner side of the contact electrode, the heating film 12011 outputs heat to the contact electrode according to the working electricity, and then the heat acts on the skin through the contact electrode.

[0078] Figure 6 The specific circuit diagram of the accessory circuit in the beauty instrument provided in the embodiment of the present application is shown. Figure 2 .like Figure 6 As shown, Figure 6 Based on the example shown, as another embodiment, the accessory circuit 1201 further includes:

[0079] The thermostatic switch S is connected in series with the heating film 12011 between the first connection contact 21 and the second connection contact 22. The thermostatic switch S is used to detect the temperature of the heating film 12011, and when the temperature is equal to or greater than the temperature threshold, disconnect the coupling path between the first connection contact 21 and the second connection contact 22 of the heating film 12011, and when the temperature is less than the temperature threshold, conduct the coupling path between the first connection contact 21 and the second connection contact 22 of the heating film 12011.

[0080] In this embodiment, the thermostatic switch S can be connected in series with the heating film 12011 between the first connection contact 21 and the second connection contact 22. Specifically, the first end of the thermostatic switch S is connected to the first connection contact 21, and the second end of the thermostatic switch S is connected to the heating film 12011.

[0081] Here, the thermostatic switch S is used to control the on / off of the conductive path between the heating film 12011 and the first connection contact 21 according to the temperature of the heating film 12011 .

[0082] For example, assuming that the temperature threshold is 44 degrees Celsius or 45 degrees Celsius, when the thermostatic switch S detects that the temperature of the heating film 12011 is 46 degrees Celsius, the heating film 12011 can be powered off by disconnecting the path between the heating film 12011 and the first connection contact 21. Accordingly, when the thermostatic switch S detects that the temperature of the heating film 12011 is less than 44 degrees Celsius or 45 degrees Celsius, the path between the heating film 12011 and the first connection contact 21 is connected again, so that the heating film 12011 can work according to the working electricity and output heat.

[0083] like Figure 6 As shown, as an embodiment, the accessory circuit 1201 further includes:

[0084] The load resistor R is connected in parallel with the thermostatic switch S. The load resistor R is used to form a coupling branch between the first connecting contact 21 and the second connecting contact 22 with the heating film 12011 when the thermostatic switch S is disconnected.

[0085] It should be noted that in Figure 6 In the embodiment, the heating film 12011 is connected in series with the thermostatic switch S to form a series branch, and the load resistor R is connected in parallel with the heating film 12011. When the thermostatic switch S is turned on, the load resistor R forms a series branch with the heating film 12011, so that the load resistor R is short-circuited. When the thermostatic switch S is turned off, the load resistor R forms a series branch with the heating film 12011.

[0086] For example, when the thermostatic switch S is turned on, since the resistance of the load resistor R is relatively large, the load resistor R is equivalent to being short-circuited, and at this time, more current flows through the thermostatic switch S to the heating film 12011. When the thermostatic switch S is turned off, the working electricity passes through the load resistor R and the heating film 12011, and finally flows to the ground end, forming a loop. At this time, since the resistance of the load circuit R is relatively large, the current flowing through the heating film 12011 is relatively small, and at this time, the heating film 12011 cannot output heat based on the working electricity.

[0087] The above scheme configures a thermostatic switch in series with the heating film, and when the thermostatic switch detects that the temperature of the heating film is equal to or greater than the temperature threshold, the coupling path between the first connection contact and the second connection contact of the heating film is disconnected, and when the temperature is less than the temperature threshold, the coupling path between the first connection contact and the second connection contact of the heating film is turned on, thereby achieving constant temperature control of the heating film. This can further improve the intelligence of the beauty instrument.

[0088] In addition, since the load resistor is connected in parallel with the thermostatic switch, when the thermostatic switch is disconnected, the load resistor and the heating film form a coupling branch between the first connecting contact and the second connecting contact, which not only stops the heating film from working, but also does not affect the normal operation of other functional units in the accessory circuit.

[0089] Those skilled in the art can clearly understand that for the convenience and simplicity of description, only the division of the above-mentioned functional units and modules is used as an example. In actual applications, the above-mentioned functions can be assigned to different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above. The functional units and modules in the embodiments can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The above-mentioned integrated unit can be implemented in the form of hardware or in the form of software functional units.

[0090] The embodiments described above are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. A beauty instrument, characterized in that: include: A host computer is configured with a first contact unit; The beauty accessory detachably connected to the main unit is configured with a second contact unit and an accessory circuit, wherein the second contact unit is used to cooperate with the first contact unit to form an electrical connection when the beauty accessory is mounted on the main unit; The host comprises: an electric energy output unit connected to the first contact unit, and configured to output working power to the first contact unit according to a power supply instruction, so as to transfer the working power to the accessory circuit through the second contact unit; The circuit switch unit is configured with a first connection end, a second connection end, a controlled end and a first sampling end, wherein the first connection end is used to connect the first contact unit, and the second connection end is grounded; the circuit switch unit is used to disconnect the path between the first contact unit and the ground according to the short-circuit protection signal, so as to disconnect the power supply circuit between the main unit and the beauty accessory; a sampling unit, connected to the first sampling end, and configured to perform voltage sampling on the first sampling end to obtain a sampled voltage; A control unit, one end of which is connected to the power output unit and the other end of which is connected to the controlled end. The control unit is used to output the power supply instruction to the power output unit and output the short-circuit protection signal to the loop switch unit when the sampling voltage is equal to or greater than the short-circuit threshold voltage.

2. The beauty instrument according to claim 1, characterized in that: The first contact unit includes a power supply contact and a loop contact; the power supply contact is used to connect the power output unit, and the loop contact is used to connect the first connection end of the loop switch unit; The loop switch unit further includes a second sampling terminal, and the second sampling terminal is used to connect to the control unit; The control unit is further configured to output a standby instruction to the power output unit, perform voltage sampling on the second sampling end to obtain an in-position sampling voltage, and output a second control signal to the loop switch unit when it is determined according to the in-position sampling voltage that the beauty accessory is mounted on the host; The electric energy output unit is also used to output a presence detection signal to the power supply contact according to the standby instruction; The circuit switch unit is used to connect the path between the circuit contact and the ground according to the second control signal, so that the power supply circuit between the host and the beauty accessory is connected.

3. The beauty instrument according to claim 2, characterized in that: The second contact unit includes a first connection contact and a second connection contact; the accessory circuit is coupled to the first connection contact and the second connection contact respectively; The first connection contact is used to cooperate with the power supply contact to form an electrical connection when the beauty accessory is mounted on the host; The second connection contact is used to cooperate with the loop contact to form an electrical connection when the beauty accessory is mounted on the host.

4. The beauty instrument according to claim 3, characterized in that: The accessory circuit comprises: A heat-generating film is coupled between the first connection contact and the second connection contact, and the heat-generating film is used to output heat according to the working electricity.

5. The beauty instrument according to claim 4, characterized in that: The accessory circuit further includes: A constant temperature switch is connected in series with the heating film between the first connecting contact and the second connecting contact. The constant temperature switch is used to detect the temperature of the heating film and disconnect the coupling path of the heating film between the first connecting contact and the second connecting contact when the temperature is equal to or greater than a temperature threshold, and connect the coupling path of the heating film between the first connecting contact and the second connecting contact when the temperature is less than the temperature threshold.

6. The beauty instrument according to claim 5, characterized in that: The accessory circuit further includes: A load resistor is connected in parallel with the thermostatic switch. The load resistor is used to form a coupling branch between the first connecting contact and the second connecting contact with the heating film when the thermostatic switch is disconnected.

7. The beauty instrument according to claim 4, characterized in that: The accessory circuit further includes: The contact electrode exposed on the surface of the beauty accessory is connected in parallel with the heating film to transfer the heat output by the heating film and to work according to the working electricity to output microcurrent.

8. The beauty instrument according to claim 7, characterized in that: The loop switch unit comprises: a switch branch and a detection branch; The first end of the switch branch is connected to the first end of the detection branch to form a first node, which serves as the first connection end; the second end of the switch branch is connected to the second end of the detection branch to form a second node, which serves as the second connection end; the controlled end of the switch branch serves as the controlled end of the loop switch unit; the path sampling node of the switch branch serves as the first sampling end of the loop switch unit; and the middle node of the detection branch serves as the second sampling end of the loop switch unit.

9. The beauty instrument according to claim 8, characterized in that: The switch branch includes: a first resistor, a second resistor and a switch tube; The first end of the first resistor serves as the first end of the switch branch, the second end of the first resistor is connected to the high potential end of the switch tube, the controlled end of the switch tube serves as the controlled end of the switch branch, the node formed by the low potential end of the switch tube and the first end of the second resistor is connected as the path sampling node, and the second end of the second resistor is grounded; The detection branch includes: a third resistor and a fourth resistor; The third resistor is connected to the first end of the first resistor, and the node formed by connecting the second end of the third resistor and the first end of the fourth resistor serves as the middle node of the detection branch. The second end of the fourth resistor is grounded.

10. The beauty instrument according to claim 1, characterized in that: The sampling unit includes: a fifth resistor, a sixth resistor, a seventh resistor and an amplifier; The fifth resistor is coupled to the inverting input terminal of the amplifier and the ground, the first end of the sixth resistor is connected to the positive input terminal of the amplifier, the second end of the sixth resistor is connected to the first sampling terminal, the first end of the seventh resistor is connected to the inverting input terminal of the amplifier, the second end of the seventh resistor is connected to the output terminal of the amplifier, and the output terminal of the amplifier is used to output the sampling voltage to the control unit.

Images