Recognition structure for different accessory heads of electric hair drier

Abstract

The utility model provides an identification structure for different accessory heads of an electric hair drier, which comprises a handle and an accessory head, the accessory head is provided with a connecting piece, and the connecting piece is provided with a first resistor and a first metal sheet; the handle is provided with a connector which is in detachable butt joint with the connecting piece, the handle is provided with a circuit board, a heating wire, an electric motor, a switch and a second metal sheet, and the heating wire, the electric motor, the switch assembly and the second metal sheet are electrically connected with the circuit board; when different accessory heads are assembled, the heating wire and the electric motor are automatically adjusted to work power matched with the accessory heads, so that a consumer can accurately control temperature and wind during hairdressing without manual adjustment, and rapid hairdressing of the consumer is facilitated.

Description

Technical Field

[0001] The utility model belongs to the field of hairdressing tools, and in particular relates to an identification structure for different accessory heads of a hair dryer. Background Art

[0002] In daily life, as people's living standards improve, they pay more attention to their appearance, and hairstyle is one of the standards for measuring a person's appearance. When styling a hairstyle, a variety of accessory heads are often needed, such as curling irons, flat nozzles, etc. When using a curling iron, the wind pressure and wind speed of the handle generally do not need to be too large; and in order to dry hair quickly, a hair dryer requires a greater wind pressure, wind speed and higher air outlet temperature. At this time, consumers need to manually adjust the air volume and temperature of the handle according to different accessory heads, which is complicated to operate and not convenient for quick hair styling. Utility Model Content

[0003] (1) Technical issues to be solved

[0004] The utility model provides an identification structure for different accessory heads of a hair dryer, aiming to solve the problem that consumers need to manually adjust the air volume and temperature of a handle according to different accessory heads.

[0005] (2) Technical solution

[0006] The utility model provides an identification structure of different accessory heads of a hair dryer; comprising a handle and an accessory head, the accessory head is provided with a connecting piece, the connecting piece is provided with a first resistor and a first metal sheet, and the two ends of the first resistor are electrically connected to the two first metal sheets respectively;

[0007] The handle is provided with a connector that is detachably connected to the connector, and the handle is provided with a circuit board, a heating wire, an electric motor, a switch assembly and a second metal sheet. The heating wire, the electric motor, the switch assembly and the second metal sheet are electrically connected to the circuit board respectively.

[0008] Furthermore, one of the two first metal sheets is provided with a contact A1, and the other is provided with a contact A2; two second metal sheets are provided on the handle, one of which is provided with a contact B1, and the other is provided with a contact B2; a chip and a second resistor are provided in the circuit board;

[0009] When in use, contact A1 of the first metal sheet is connected to B1 of the second metal sheet, contact A2 of the first metal sheet is connected to B2 of the second metal sheet, the first resistor is connected in series with the second resistor; one end of the first resistor is connected to the positive pole of the power supply, and the other end is connected to one end of the second resistor, and the other end of the second resistor is connected to the negative pole; the voltage is divided when passing between the first resistor and the second resistor, and a detection point Q is provided at the voltage dividing point. The voltage signal at the detection point Q is transmitted to the chip through the DETE pin. The chip receives the voltage signal and sends an output signal to the heating wire and the electric motor to make them work.

[0010] Furthermore, the accessory head is provided with multiple types of different functions, and the accessory heads with different functions are provided with first resistors with different resistance values. The chip is provided with multiple different output signals, and the heating wire and the electric motor receive different output signals to work with different powers; a storage device is provided in the chip, and the storage device is provided with voltage signal values ​​corresponding to the different output signals; when the chip receives the voltage signal, the chip identifies and matches the voltage signal with the voltage signal value of the storage device, and sends corresponding output signals to the heating wire and the electric motor, so that they work with corresponding powers.

[0011] Furthermore, the connecting piece and the connecting head are both through-hole cylindrical structures, the upper part of the connecting head is recessed inward so that its outer diameter is smaller than the outer diameter of the lower part of the connecting head, so that a step is formed between the upper and lower parts of the connecting head; the upper outer diameter of the connecting head matches the inner diameter of the connecting piece; when the connecting head and the connecting piece are combined, the upper outer wall of the connecting head abuts against the inner wall of the connecting piece, and the bottom of the connecting piece abuts against the step.

[0012] Furthermore, contacts A1 and A2 of the first metal sheet are both located on the lower outer wall of the connector, the handle comprises a handle body and an outer shell, the outer shell covers the lower part of the connector when assembled, contacts B1 and B2 of the second metal sheet are both located on the inner side of the outer shell and correspond to the positions of contacts A1 and A2 respectively; when the accessory head is connected to the handle, contact A1 corresponds to contact B1 in position and the contact is conductive, and contact A2 corresponds to contact B2 in position and the contact is conductive.

[0013] Furthermore, contacts A1 and A2 of the first metal sheet are both located at the bottom edge of the connector, and contacts B1 and B2 of the second metal sheet are both located at the step abutting surface of the connector and correspond to the positions of contacts A1 and A2 respectively; when the accessory head is connected to the handle, the upper portion of the connector is located inside the connector, and the bottom of the connector abuts against the step, so that contact A1 corresponds to contact B1 in position and is in contact and conductive, and contact A2 corresponds to contact B2 in position and is in contact and conductive.

[0014] Furthermore, contacts A1 and A2 of the first metal sheet are both located at the lower inner wall of the connector, and contacts B1 and B2 of the second metal sheet are both located at the upper outer wall of the connector and correspond to the positions of contacts A1 and A2 respectively; when the accessory head is connected to the handle, the upper part of the connector is located inside the connector, the bottom of the connector abuts against the step, and the inner wall of the connector abuts against the bottom of the upper outer wall of the connector, so that contact A1 corresponds to contact B1 in position and is in contact and conductive, and contact A2 corresponds to contact B2 in position and is in contact and conductive.

[0015] Furthermore, the connecting piece is provided with a limit block, the limit block is located at the lower inner wall of the connecting piece, and the top of the limit block is provided with a first limit surface; the upper outer wall of the connecting head is provided with a limit groove cooperating with the limit block, the limit groove includes a notch, a guide surface, a second limit surface and a fixed surface, and the fixed surface corresponds to the bottom surface and the side surface of the limit block; the guiding and fixing effect of the limit groove is used to realize the upper and lower fixing effect of the handle on the connecting piece.

[0016] Furthermore, the connecting piece is also provided with a fixing groove, which is located at the outer wall of the lower part of the connecting piece, the limiting block and the fixing groove correspond to each other inside and outside the lower part of the connecting piece, and a mounting position is provided on the upper part of the handle body and below the limiting groove, and sliding grooves are provided on the inner walls on both sides of the mounting position, and a fixing fitting is provided between the handle body and the outer shell, and the fixing fitting is installed on the mounting position, and the fixing fitting includes a spring, a locking block and a locking button; protrusions corresponding to the sliding grooves are provided on both sides of the locking block, one end of the spring is pressed against the bottom of the locking block, and the other end is pressed against the inner wall of the bottom of the mounting position, and the locking button is located on the outer wall of the locking block; the left and right fixing effect of the handle on the connecting piece is realized through the action of the fixing fitting and the fixing groove.

[0017] Furthermore, the accessory head is provided with a plurality of functional types, and the accessory head is any one of a curling iron, a flat hair dryer, a hot or cold comb and a hair straightener.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] The utility model has different first resistors on accessory heads with different hairdressing functions. The circuit board in the handle will automatically identify and match the voltage signal after the first resistor is turned on, and send different output signals to the heating wire and the electric motor to make them work at different powers. Therefore, when different accessory heads are assembled, the heating wire and the electric motor will automatically adjust to the working power used with the accessory head, so that consumers can achieve precise temperature and wind control during hairdressing without manual adjustment, thereby facilitating consumers to quickly perform hairdressing. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 The structure of the utility model is shown in FIG. Figure 1 ;

[0021] Figure 2 It is an exploded view of the utility model;

[0022] Figure 3 It is a schematic diagram of the accessory head of the utility model;

[0023] Figure 4 It is a partial structural schematic diagram of an embodiment of the utility model;

[0024] Figure 5 This is the chip pin diagram of the utility model;

[0025] Figure 6 This is a simple circuit diagram of the utility model;

[0026] Figure 7 This is a diagram showing the voltage signal variation at the detection point of the utility model;

[0027] Figure 8 This is a flow chart of the identification system of the utility model;

[0028] Fig. 9 This is a schematic diagram of the limit block structure of the utility model;

[0029] Fig.10 This is a schematic diagram of the limit groove structure of the utility model;

[0030] Fig.11 It is a schematic diagram of the combination of the limit groove and the limit block of the utility model;

[0031] Fig.12 It is a partial exploded view of the fixed matching part of the utility model;

[0032] Fig.13 The utility model is a schematic diagram of the fixed matching piece and the fixed groove combination. Figure 1 ;

[0033] Fig.14 The utility model is a schematic diagram of the fixed matching piece and the fixed groove combination. Figure 2 ;

[0034] Fig.15 The utility model is a schematic diagram of the fixed matching piece and the fixed groove combination. Figure 3 .

[0035] Figure markings: 1-handle, 11-handle body, 12-shell, 13-connecting head, 131-second metal sheet, 132-limiting groove, 1321-notch, 1322-guide surface, 1323-fixing surface, 1324-second limiting surface, 14-installing position, 141-locking block, 142-locking button, 143-spring, 2-accessory head, 21-connecting piece, 211-first metal sheet, 212-limiting block, 2121-first limiting surface, 213-fixing groove. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0037] like Figure 1-2 As shown, the utility model provides an identification structure of different accessory heads of a hair dryer, comprising a handle 1 and an accessory head 2, wherein the accessory head 2 is provided with a connecting piece 21, and the connecting piece 21 is provided with a first resistor (not shown) and a first metal sheet 211, wherein both ends of the first resistor are electrically connected to the two first metal sheets 211 respectively;

[0038] The handle 1 is provided with a connector 13 that is detachably connected to the connector 21, and the handle 1 is provided with a circuit board, a heating wire, an electric motor, a switch assembly and a second metal sheet 131, and the heating wire, the electric motor, the switch assembly and the second metal sheet 131 are electrically connected to the circuit board respectively;

[0039] When in use, the accessory head 2 is installed on the top of the handle 1, the connecting piece 21 is connected to the connecting head 13, and the first metal sheet 211 on the accessory head 2 is in contact with the second metal sheet 131 on the handle 1, so that the first metal sheet 211 and the second metal sheet 131 are conductive or signal connection is achieved, thereby electrically connecting the first resistor on the accessory head 2 to the circuit board on the handle 1; power is turned on and the switch assembly is started, and after the circuit board receives the voltage signal indicating that the first resistor of the accessory head 2 is conductive, an output signal is sent to the heating wire and the electric motor on the handle 1.

[0040] Specifically, Figure 4-6 As shown, one of the two first metal sheets 211 is provided with a contact A1, and the other is provided with a contact A2; the handle 1 is provided with two second metal sheets 131, one of which is provided with a contact B1, and the other second metal sheet 131 is provided with a contact B2; the circuit board is provided with a chip FT61E132A-RB and a second resistor; Figure 6 As shown, at this time, the contact B1 in the circuit is connected to the positive electrode of the power supply in the circuit, the contact B2 is connected to one end of the second resistor, and the other end of the second resistor is connected to the negative electrode;

[0041] When in use, after the accessory head 2 is installed and connected with the handle 1, the contact A1 of the first metal sheet 211 is connected to B1 on the second metal sheet 131, and the contact A2 of the first metal sheet 211 is connected to B2 on the second metal sheet 131, so that the first resistor of the accessory head 2 is connected in series with the second resistor of the circuit board; at this time, one end of the first resistor is connected to the positive electrode of the power supply, and the other end is connected to one end of the second resistor, and the other end of the second resistor is connected to the negative electrode; the voltage is divided when passing between the first resistor and the second resistor, and a detection point Q is provided at the voltage dividing point, and the voltage signal of the detection point Q is the voltage of the second resistor. The voltage signal at the detection point Q is transmitted to the chip through the DETE pin, and the chip receives the voltage signal and sends an output signal to the heating wire and the electric motor to make them work;

[0042] Furthermore, if Figure 7-8 As shown, the accessory head 2 of this product is provided with a plurality of types with different functions, and the accessory heads 2 with different functions are provided with first resistors with different resistance values, and the chip is provided with a plurality of different output signals sent to the heating wire and the electric motor, and the heating wire and the electric motor work with different powers when receiving different output signals; a storage device is also provided in the chip, and different voltage signal values ​​corresponding to the output signals are provided in the storage device; after the first resistor is connected to the circuit board, the detection point Q detects the voltage signal and transmits it to the DETE pin, and the chip receives the voltage signal of the DETE pin, and by identifying and matching the voltage signal with the voltage signal value in the storage device, the chip sends corresponding output signals to the heating wire and the electric motor, so that they work with corresponding powers;

[0043] Preferably, for example, three voltage signal values ​​are provided in the storage, and the chip is provided with three output signals corresponding to the voltage signal values, namely, a low power output signal, a medium power output signal and a high power output signal; the voltage signal value D1 is 3.33v corresponding to the low power output signal; the voltage signal value D2 is 2.5v corresponding to the medium power output signal; the voltage signal value D3 is 2v corresponding to the high power output signal; at this time, the resistance value of the second resistor is fixed at 20K, and the power supply voltage is 5V. It should be noted that the voltage signal value D1 can be set to a specific value of 3.33v. In order to reduce the recognition error, the voltage signal value D1 can also be set to a range close to 3.33v, and the voltage signal values ​​D2 and D3 are the same;

[0044] When the resistance of the first resistor of the accessory head is 10K, when the voltage signal detected by the detection point Q received by the chip DETE pin is about 3.33v, after the memory identification and matching, the chip sends a low-power output signal to the heating wire and the electric motor;

[0045] When the resistance of the first resistor of the accessory head is 20K, when the voltage signal detected by the detection point Q received by the chip DETE pin is about 2.5V, after the storage recognition and matching, the chip sends a medium-power output signal to the heating wire and the electric motor;

[0046] When the resistance of the first resistor of the accessory head is 30K, when the voltage signal detected by the detection point Q received by the chip DETE pin is about 2V, after the storage recognition and matching, the chip sends a high-power output signal to the heating wire and the electric motor.

[0047] It should be noted that the matching relationship between the chip's output signal and the voltage signal value can be set through the chip program. Therefore, the above is only one of the embodiments of the present invention and not all implementation methods. It should be understood that the description of the embodiment of the present invention here is not used to limit the protection scope of the present invention; that is, it can also be set that three voltage signal values ​​are set in the storage, and the chip has three output signals corresponding to the voltage signal values, namely low-power output signal, medium-power output signal and high-power output signal; the voltage signal value D1 is 3.33v corresponding to the high-power output signal; the voltage signal value D2 is 2.5v corresponding to the medium-power output signal; the voltage signal value D3 is 2v corresponding to the low-power output signal.

[0048] Specifically, Fig.11 As shown, the connector 21 and the connector head 13 are both hollow cylindrical structures, and the upper part of the connector head 13 is recessed inward so that its outer diameter is smaller than the outer diameter of the lower part of the connector head 13, thereby forming a step between the upper part and the lower part of the connector head 13; the upper outer diameter of the connector head 13 matches the inner diameter of the connector 21; when the connector head 13 and the connector 21 are combined, the upper outer wall of the connector head 13 abuts against the inner wall of the connector 21, and the bottom of the connector 21 abuts against the step.

[0049] Furthermore, if Figure 2 and Figure 4 As shown, the contacts A1 and A2 on the first metal sheet 211 are both located on the lower outer wall of the connecting member 21, the handle 1 includes a handle body 11 and a shell 12, and the shell 12 covers the lower part of the connecting member 21 when assembled, and the contacts B1 and B2 on the second metal sheet 131 are both located on the inner side of the shell 12 and correspond to the positions of the contacts A1 and A2 respectively; when the accessory head 2 is connected to the handle 1, the contact A1 corresponds to the contact B1 in position and the contact is conductive, and the contact A2 corresponds to the contact B2 in position and the contact is conductive.

[0050] Preferably, the contacts A1 and A2 on the first metal sheet 211 are both located at the bottom edge of the connector 21, and the contacts B1 and B2 on the second metal sheet 131 are both located at the step abutting surface of the connector 13 and correspond to the positions of the contacts A1 and A2 respectively; when the accessory head 2 is connected to the handle 1, the upper part of the connector 13 is located inside the connector 21, and the bottom of the connector 21 abuts against the step, so that the contact A1 corresponds to the contact B1 in position and the contact is conductive, and the contact A2 corresponds to the contact B2 in position and the contact is conductive.

[0051] Preferably, the contacts A1 and A2 on the first metal sheet 211 are both located at the lower inner wall of the connector 21, and the contacts B1 and B2 on the second metal sheet 131 are both located at the upper outer wall of the connector 13 and correspond to the positions of the contacts A1 and A2 respectively; when the accessory head 2 is connected to the handle 1, the upper part of the connector 13 is located inside the connector 21, the bottom of the connector 21 abuts against the step, and the inner wall of the connector 21 abuts against the bottom of the upper outer wall of the connector 13, so that the contact A1 corresponds to the contact B1 in position and is in contact and conductive, and the contact A2 corresponds to the contact B2 in position and is in contact and conductive.

[0052] Specifically, Figure 9-11 As shown, a limit block 212 is provided on the connecting member 21, and the limit block 212 is located at the lower inner wall of the connecting member 21, and a first limit surface 2121 is provided on the top of the limit block 212;

[0053] The upper outer wall of the connector 13 is provided with a limiting groove 132 that cooperates with the limiting block 212. The limiting groove 132 includes a notch 1321, a guide surface 1322, a second limiting surface 1324 and a fixing surface 1323. The fixing surface 1323 and the bottom surface and side surface of the limiting block 212 are all L-shaped structures.

[0054] like Fig.11 As shown, when the accessory head 2 is installed on the handle 1, the accessory head 2 is located above the handle 1 and moves toward the handle 1. After the limiting block 212 on the inner wall of the connecting member 21 enters from the notch 1321 of the limiting groove 132, it abuts against the guide surface 1322 and moves along the extension direction of the guide surface 1322. When the limiting block 212 moves to a state of being in contact with the fixing surface 1323, the first limiting surface 2121 on the top of the limiting block 212 abuts against the second limiting surface 1324 of the limiting groove 132 to increase the friction force. The guiding and fixing effect of the limiting groove 132 enables the handle 1 to fix the connecting member 21 up and down.

[0055] Furthermore, if Figure 12-15 As shown, the connecting member 21 is further provided with a fixing groove 213, and the fixing groove 213 is located at the outer wall of the lower part of the connecting member 21, and the limiting block 212 corresponds to the fixing groove 213 inside and outside the lower part of the connecting member 21.

[0056] A mounting position 14 is provided on the upper part of the handle body 11 and below the limit groove 132, and sliding grooves are provided on the inner walls on both sides of the mounting position 14. A fixing fitting is provided between the handle body 11 and the shell 12, and the fixing fitting is installed on the mounting position 14, and the fixing fitting includes a spring 143, a locking block 141 and a locking button 142; protrusions corresponding to the sliding grooves are provided on both sides of the locking block 141; when installing, the locking block 141 is inserted into the mounting position 14, and the protrusions on both sides of the locking block 141 are located in the sliding grooves on both sides of the mounting position 14, so that the locking block 141 can slide up and down along the length direction of the sliding groove, one end of the spring 143 is pressed against the bottom of the locking block 141, and the other end is pressed against the inner wall of the bottom of the mounting position 14, and the locking button 142 is located at the outer wall of the locking block 141, which is convenient for consumers to press and slide the locking block 141;

[0057] When in use, first press the lock button 142 with your finger and slide the locking block 141 along the direction of the spring 143 to compress the spring 143, and then install and connect the connecting piece 21 to the connecting head 13, and lock the connecting piece 21 up and down on the connecting head 13 through the action of the limit block 212 and the limit groove 132. Due to the guiding effect of the limit groove 132, the fixing groove 213 of the connecting piece 21 is located directly above the installation position 14; at this time, release your finger, and under the elastic action of the spring 143, the locking block 141 is pushed to move to the position of the fixing groove 213 until the top of the locking block 141 is inserted into the fixing groove 213, thereby realizing the left and right fixing effect on the connecting piece 21.

[0058] It should be noted that the limit blocks 212 are provided in plurality and are equidistantly distributed on the inner wall of the connecting member 21 ; the number and positions of the limit grooves 132 correspond to the limit blocks 212 ; the number and positions of the fixing grooves 213 correspond to the limit blocks 212 .

[0059] The handle 1 can be locked to the accessory head 2 in multiple directions up, down, left, and right directions by the cooperation between the limit block 212 and the limit groove 132 and by the cooperation between the fixed fitting and the fixed groove 213. The process is convenient, fast, time-saving and labor-saving, which improves the locking and fixing degree of the handle 1 to the accessory head 2 and thus improves the consumer's usage experience.

[0060] Specifically, Figure 3 As shown, the accessory head 2 has various forms, such as a curling iron, a flat hair nozzle, a hot and cold comb, and a hair straightener, etc. Consumers can replace different accessory heads 2 for use according to their different needs.

[0061] The following is a detailed description of the working principle of the utility model;

[0062] When using, the consumer first connects the product to a power source, then selects the accessory head 2 according to the needs, and fixes the accessory head 2 on the top of the handle 1 by matching the connector 21 on the accessory head 2 with the connector 13 on the handle 1. At this time, the first metal sheet 211 on the accessory head 2 is connected to the second metal sheet 131 on the handle 1; then the switch assembly is started, and the circuit board in the handle 1 receives the voltage signal of the accessory head 2 being turned on, and identifies and matches the voltage signal. After the identification and matching is completed, the corresponding output signal is sent to the heating wire and the electric motor. After receiving the output signal, the heating wire and the electric motor operate at a specific power, and the consumer can perform hairdressing operations;

[0063] When the consumer completes the first step of the hairdressing operation or wants to replace the accessory head 2 for the next step of the hairdressing operation, he only needs to remove the current accessory head 2 and install another accessory head 2 on the connecting head 13 of the handle 1. At this time, after the first metal sheet 211 on the accessory head 2 is connected with the second metal sheet 131 on the handle 1, the circuit board receives the voltage signal of the accessory head 2 being turned on again. Since the resistance value of the first resistor in the accessory head 2 is different from the resistance value of the first resistor in the previous accessory head 2, the circuit board recognizes and matches the voltage signal and sends another output signal to the heating wire and the electric motor. After receiving the other output signal, the heating wire and the electric motor work according to another specific power, and the consumer can proceed to the next step of the hairdressing operation, which is convenient and quick.

[0064] The innovation of the utility model lies in that different first resistors are provided on accessory heads with different hairdressing functions, and the circuit board in the handle will automatically identify and match the voltage signal after the first resistor is turned on, and send different output signals to the heating wire and the electric motor to make them work at different powers, so that when different accessory heads are assembled, the heating wire and the electric motor will automatically adjust to the working power used with the accessory head, so that consumers do not need to manually and frequently adjust the temperature of the heating wire and the speed of the electric motor to control the air volume, and can achieve precise temperature and air control during hairdressing, thereby facilitating consumers to quickly perform hairdressing.

[0065] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementations that can be understood by those skilled in the art.

[0066] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A recognition structure for different accessory heads of a hair dryer, characterized in that: It comprises a handle (1) and an accessory head (2), the accessory head (2) being provided with a connecting piece (21), the connecting piece (21) being provided with a first resistor and a first metal sheet (211), and the two ends of the first resistor being electrically connected to the two first metal sheets (211) respectively; The handle (1) is provided with a connector (13) that is detachably connected to the connector (21), and the handle (1) is provided with a circuit board, a heating wire, an electric motor, a switch assembly, and a second metal sheet (131), and the heating wire, the electric motor, the switch assembly, and the second metal sheet (131) are respectively electrically connected to the circuit board.

2. According to claim 1, a structure for identifying different accessory heads of a hair dryer, characterized in that: One of the two first metal sheets (211) is provided with a contact A1, and the other is provided with a contact A2; two second metal sheets (131) are provided on the handle (1), one of the second metal sheets (131) is provided with a contact B1, and the other second metal sheet (131) is provided with a contact B2; a chip and a second resistor are provided in the circuit board; When in use, the contact A1 of the first metal sheet (211) is connected to B1 of the second metal sheet (131), the contact A2 of the first metal sheet (211) is connected to B2 of the second metal sheet (131), and the first resistor is connected in series with the second resistor; one end of the first resistor is connected to the positive electrode of the power supply, and the other end is connected to one end of the second resistor, and the other end of the second resistor is connected to the negative electrode; the voltage is divided when passing between the first resistor and the second resistor, and a detection point Q is provided at the voltage dividing point, and the voltage signal at the detection point Q is transmitted to the chip through the DETE pin, and the chip receives the voltage signal and sends an output signal to the heating wire and the electric motor to make them work.

3. The identification structure of different accessory heads of a hair dryer according to claim 2, characterized in that: The accessory head (2) is provided with a plurality of types with different functions, the accessory heads (2) with different functions are provided with first resistors with different resistance values, the chip is provided with a plurality of different output signals, the heating wire and the electric motor receive different output signals and work with different powers; a storage device is provided in the chip, and the storage device is provided with voltage signal values ​​corresponding to the different output signals; The chip receives a voltage signal, and by identifying and matching the voltage signal with the voltage signal value of the storage, the chip sends a corresponding output signal to the heating wire and the electric motor, so that they work at the corresponding power.

4. The identification structure of different accessory heads of a hair dryer according to claim 2, characterized in that: The connecting piece (21) and the connecting head (13) are both cylindrical structures with a central hole; the upper portion of the connecting head (13) is recessed inwardly so that its outer diameter is smaller than the outer diameter of the lower portion of the connecting head (13), so that a step is formed between the upper portion and the lower portion of the connecting head (13); the outer diameter of the upper portion of the connecting head (13) matches the inner diameter of the connecting piece (21); when the connecting head (13) and the connecting piece (21) are combined, the upper outer wall of the connecting head (13) abuts against the inner wall of the connecting piece (21), and the bottom of the connecting piece (21) abuts against the step.

5. The identification structure of different accessory heads of a hair dryer according to claim 4, characterized in that: The contacts A1 and A2 of the first metal sheet (211) are both located on the outer wall of the lower part of the connecting member (21); the handle (1) comprises a handle body (11) and a shell (12); when assembled, the shell (12) covers the lower part of the connecting member (21); the contacts B1 and B2 of the second metal sheet (131) are both located on the inner side of the shell (12) and correspond to the positions of the contacts A1 and A2 respectively; when the accessory head (2) is connected to the handle (1), the contact A1 corresponds to the contact B1 and is in contact and conduction; and the contact A2 corresponds to the contact B2 and is in contact and conduction.

6. The identification structure of different accessory heads of a hair dryer according to claim 4, characterized in that: The contacts A1 and A2 of the first metal sheet (211) are both located at the bottom edge of the connecting piece (21), and the contacts B1 and B2 of the second metal sheet (131) are both located at the step abutting surface of the connecting head (13) and correspond to the positions of the contacts A1 and A2 respectively; when the accessory head (2) is connected to the handle (1), the upper part of the connecting head (13) is located inside the connecting piece (21), and the bottom of the connecting piece (21) abuts against the step, so that the positions of the contacts A1 and B1 correspond and are in contact and conductive, and the positions of the contacts A2 and B2 correspond and are in contact and conductive.

7. The identification structure of different accessory heads of a hair dryer according to claim 4, characterized in that: The contacts A1 and A2 of the first metal sheet (211) are both located at the lower inner wall of the connecting piece (21), and the contacts B1 and B2 of the second metal sheet (131) are both located at the upper outer wall of the connecting head (13) and correspond to the positions of the contacts A1 and A2 respectively; when the accessory head (2) is connected to the handle (1), the upper part of the connecting head (13) is located inside the connecting piece (21), the bottom of the connecting piece (21) abuts against the step, and the inner wall of the connecting piece (21) abuts against the bottom of the upper outer wall of the connecting head (13), so that the contact A1 corresponds to the contact B1 and is in contact and conduction, and the contact A2 corresponds to the contact B2 and is in contact and conduction.

8. The identification structure of different accessory heads of a hair dryer according to claim 5, characterized in that: The connecting member (21) is provided with a limit block (212), the limit block (212) is located at the lower inner wall of the connecting member (21), and the top of the limit block (212) is provided with a first limit surface (2121); the upper outer wall of the connecting head (13) is provided with a limit groove (132) cooperating with the limit block (212), the limit groove (132) comprising a notch (1321), a guide surface (1322), a second limit surface (1324) and a fixing surface (1323), the fixing surface (1323) corresponding to the bottom surface and the side surface of the limit block (212); the guiding and fixing effects of the limit groove (132) enable the handle (1) to fix the connecting member (21) up and down.

9. The identification structure of different accessory heads of a hair dryer according to claim 8, characterized in that: The connecting member (21) is further provided with a fixing groove (213), the fixing groove (213) being located at the outer wall of the lower part of the connecting member (21), the limiting block (212) and the fixing groove (213) corresponding to each other inside and outside the lower part of the connecting member (21), a mounting position (14) being provided at the upper part of the handle body (11) and below the limiting groove (132), sliding grooves being provided on the inner walls on both sides of the mounting position (14), a fixing matching member being provided between the handle body (11) and the outer shell (12), the fixing matching member being installed at the mounting position (14), the fixed fitting comprises a spring (143), a locking block (141) and a locking button (142); protrusions corresponding to the sliding groove are provided on both sides of the locking block (141); one end of the spring (143) is pressed against the bottom of the locking block (141), and the other end is pressed against the inner wall of the bottom of the installation position (14); the locking button (142) is located on the outer wall of the locking block (141); the left and right fixing effect of the handle (1) on the connecting member (21) is achieved through the action of the fixed fitting and the fixing groove.

10. The identification structure of different accessory heads of a hair dryer according to claim 1, characterized in that: The accessory head (2) is provided with a plurality of functional types, and the accessory head (2) is any one of a curling iron, a flat hair dryer, a hot or cold comb, and a hair straightener.

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