Hand-sensing high-speed hair dryer

Abstract

The utility model relates to a hand-sensing high-speed hair drier, which comprises an air nozzle assembly, a machine body assembly and a handle, the air nozzle assembly is connected to an air outlet of the machine body assembly, and a metal conductor and a touch chip circuit board assembly are arranged in an insulating handle shell; the metal conductor is electrically connected with the touch chip circuit board assembly; the touch chip circuit board assembly is electrically connected with the main control chip circuit board assembly of the hair dryer; when the hair drier is powered on to work, the handle is held by a hand, a capacitor is formed by the handle and the metal conductor in the handle shell, when the hand is separated from the handle, the capacitance value of the capacitor changes, and the main control chip circuit board assembly detects the capacitance value change through the touch chip circuit board and controls the hair drier to be turned off. Therefore, the use safety of the high-speed blower is effectively ensured, and the use comfort is improved.

Description

Technical Field

[0001] The utility model relates to a hair drying device, in particular to a hand-sensing high-speed hair dryer. Background Art

[0002] A high-speed hair dryer is a personal care product that dries the hair and styles the hair. The hair dryer generally includes a nozzle assembly and a body assembly. The principle is to set a high-speed fan assembly in the air duct of the body assembly, and the main control chip circuit board assembly controls the heating element assembly set in front of the high-speed fan assembly. When the high-speed fan assembly is running, the motor blades inhale gas from the air inlet of the air duct and then blow it through the air duct to the heating element assembly. The air outlet of the nozzle assembly generates a strong cold or warm airflow to quickly dry the hair and style the hair. High-speed hair dryers are popular among consumers because of their large airflow and low noise, and can quickly dry hair and style hair.

[0003] When the power switch of a high-speed hair dryer is forgotten to be turned off or the hair dryer is placed on a table or countertop, if there is an obstacle in front of the air outlet of the high-speed hair dryer, the strong airflow and high temperature generated by the operation of the hair dryer may ignite the obstacle and cause a fire, which poses a great safety hazard. To solve this problem, the prior art generally adopts a method of timing the power fan to shut down when the temperature is too high. However, this method will also be turned off at a fixed time during normal use, which brings inconvenience to the user. Utility Model Content

[0004] The technical problem to be solved by the utility model is to avoid the potential safety hazards of hair dryers in the prior art and to propose a hand-sensing high-speed hair dryer.

[0005] The technical solution adopted by the utility model to solve its technical problems is: a hand-sensing high-speed hair dryer, comprising a nozzle assembly, a body assembly and a handle, wherein the nozzle assembly is connected to the air outlet of the body assembly; the handle comprises an insulating handle shell, a metal conductor arranged in the handle shell and a touch chip circuit board assembly; the metal conductor is attached to the inner wall of the handle shell; the metal conductor is electrically connected to the touch chip circuit board assembly; the touch chip circuit board assembly is electrically connected to the main control chip circuit board assembly of the hair dryer; when the hair dryer is used by a person holding the handle, a capacitor is formed with the metal conductor in the handle shell, and when the person's hand leaves the handle, the capacitance value of the capacitor changes, and the main control chip circuit board assembly detects the change in capacitance value through the touch chip circuit board to control the working state of the hair dryer.

[0006] Further:

[0007] The metal conductor has a closed structure for surrounding the inner wall of the handle shell, and the shape of the closed structure is a shape that matches the cross-section of the handle inner cavity; there is a connecting arm extending outward on the annular structure, and the connecting arm is used to electrically connect with the touch chip circuit board assembly.

[0008] An air duct running vertically through the handle housing is provided in the air duct, and a high-speed fan assembly is provided in the air duct; the air outlet of the air duct is communicated with the air inlet of the fuselage assembly, and the air inlet of the air duct faces the air inlet component at the lower end of the handle.

[0009] The air duct is formed by buckling a left air duct shell and a right air duct shell; the air duct and the high-speed fan assembly are interference-fitted so that the high-speed fan assembly is fastened in the air duct.

[0010] The metal conductor and the touch chip circuit board assembly are located between the inner wall of the handle shell and the outer wall of the air duct.

[0011] The air duct is located below the high-speed fan assembly and is surrounded by sound-absorbing cotton on the inner wall near the air inlet of the air duct.

[0012] The handle is also provided with a switch button, and the switch button is electrically connected to the touch chip circuit board assembly.

[0013] The heating component of the fuselage assembly is arranged in the cavity of the main shell of the fuselage assembly, close to the air outlet side; the main control chip circuit board component is arranged on the bottom shell side of the main shell away from the air outlet in the inner cavity of the main shell.

[0014] Compared with the prior art, the beneficial effects of the utility model are: effectively avoiding the safety hazards of using a high-speed hair dryer, being easy to operate, improving the comfort of use, and having a simple manufacturing process, being easy to install and produce, and having a low manufacturing cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of an axonometric projection of a hand-sensing high-speed hair dryer in a preferred embodiment of the utility model;

[0016] Figure 2 It is a schematic diagram of the orthographic projection of a hand-sensing high-speed hair dryer in a preferred embodiment of the utility model;

[0017] Figure 3 It is a left-side sectional schematic diagram of the internal assembly of a hand-sensing high-speed hair dryer in a preferred embodiment of the utility model;

[0018] Figure 4 It is a schematic diagram of the front view of a hand-sensing high-speed hair dryer in a preferred embodiment of the utility model, and the arrows in the figure indicate the direction of wind flow;

[0019] Figure 5 The utility model is an exploded schematic diagram of a high-speed hair dryer; the arrows in the figure indicate the direction of wind flow. DETAILED DESCRIPTION

[0020] Now, in conjunction with the accompanying drawings, a preferred embodiment of the present utility model is described in detail.

[0021] See also Figures 1 to 5 A hand-sensing high-speed hair dryer includes a nozzle assembly 10, a body assembly 20 and a handle 200. The nozzle assembly 10 is installed at the air outlet of the body assembly 20; the upper end of the handle is connected to the body assembly; and the lower end of the handle is connected to the air inlet component.

[0022] The body assembly 20 includes a main housing 201 and a magnetic iron ring 202, a heating element bracket 203, a heating element bracket sealing ring 204, a heating element assembly 205, a main control chip circuit board bracket 206, a main control chip circuit board assembly 207, a display light board assembly 208, a rear cover sealing ring 209 and a rear cover 210. The magnetic iron ring is arranged at the air outlet of the main housing 201; the heating element assembly 205 is fixed on the side near the air outlet through the heating element bracket 203; the main control chip circuit board assembly 207 is installed on the side of the rear cover 210 through the main control chip circuit board bracket 206. An airflow channel is left between the heating element assembly 205 and the main housing 201.

[0023] See also Figures 3 to 5 The handle 200 is a hand-sensing handle, including an insulating handle shell 221, a metal conductor 211, a sound-absorbing cotton 212, a left air duct shell 213, a high-speed fan assembly 214, a right air duct shell 215, a sealing pad 216, a touch chip circuit board assembly 217, a button bracket 218, a button 219 and a safety isolation frame 220. The metal conductor 211 and the touch chip circuit board assembly 217 in the handle 200 can be fixed on the outer surface of the air duct formed by the left air duct shell 213 and the right air duct shell 215 by adhesive, screws, buckles or adhesive tape, and the touch chip circuit board assembly 217 is electrically connected to the metal conductor 211 through a wire. The metal conductor has a closed structure for surrounding the inner wall of the handle shell, and the shape of the closed structure is a shape that matches the cross-section of the handle inner cavity; there is a connecting arm extending outward on the annular structure, and the connecting arm is used to be electrically connected to the touch chip circuit board assembly.

[0024] The left duct shell 213 and the right duct shell 215 are buckled together and fixed by means of snaps, screws, etc. to form an air duct; the high-speed fan assembly 214 is arranged in the inner cavity of the air duct formed by the left duct shell 213 and the right duct shell 215; the air duct and the high-speed fan assembly 214 are fastened by an interference fit.

[0025] The hand sensing handle 200 is provided with a switch button 219 , and the button bracket 218 is fixed to the air duct housing by means of snaps or screws, and the switch button 219 is fixed to the button bracket 218 by means of snaps, and the switch button 219 is electrically connected to the touch chip circuit board assembly 217 .

[0026] The handle shell 221 of the handle 200 made of insulating material is put on the air duct formed by the air duct left shell 213 and the air duct right shell 215 by means of buckles or screws; the air outlet of the air duct is connected with the air inlet of the fuselage component, and the air inlet of the air duct faces the air inlet at the lower end of the handle shell; the inner wall of the air inlet of the air duct is surrounded by sound-absorbing cotton, and the air inlet is installed with a safety isolation frame 220 with through holes. The air inlet component is provided with a mesh hole, which is connected to the air duct through the air inlet bracket 222. The air inlet net shell is put on the air inlet bracket 222 and connected to the handle shell as a whole; the air inlet net shell is provided with ventilation mesh holes.

[0027] The metal conductor 211 of the hand-sensing handle 200 is fixed on the outer surface of the air duct formed by the left shell 213 and the right shell 215 of the air duct, and then the handle shell 221 is put on the air duct, and the metal conductor 211 is accommodated between the outer surface of the air duct and the inner surface of the handle shell; the inner wall of the handle shell 221 is in contact with the metal conductor 211 to form an electrode of the capacitor; the metal conductor 211 is in contact with the inner wall of the handle shell, and this contact assembly not only reduces the space, but also increases the sensitivity of the outer wall surface of the handle shell 221; when the human hand touches the outer wall surface of the handle shell 221, the human hand forms another electrode of the capacitor. The basic principle of the capacitor is: it is achieved by isolating the two conductors and separating them with insulating materials. When voltage is applied to the two conductors, charges will accumulate between the conductors to form an electric field, which is the essence of the capacitor. The structure of the hand sensing handle is analyzed according to the basic principle of capacitance as follows: when a human hand touches the handle housing 221, a capacitor is formed with the metal conductor 211 on the inner wall of the handle housing 221 made of insulating material. The human hand is a conductor with its own electric field. When the power switch is turned on, voltage is applied to the metal conductor 211, forming a capacitor with the hand touching the handle, and the capacitance value will change as the person touches and leaves the handle. The change in capacitance value is detected by the capacitance sensor of the touch chip circuit board assembly 217, and the change in capacitance value is converted into an electrical signal. The main control chip circuit board assembly 207 processes the electrical signal to determine whether a human hand is sensed. If a human hand is sensed, the hair dryer is powered on; if no human hand is sensed, the hair dryer is automatically powered off.

[0028] The hair dryer in this example works as follows: first turn on the switch button 219, and when a person holds the hair dryer handle, a capacitor is formed between the metal conductor 211 inside the handle, and the capacitance value changes. This change in capacitance value is detected by the capacitance sensor of the touch chip circuit board assembly 217 and the change value is converted into an electrical signal, which is transmitted to the main control chip circuit board assembly 207 for processing. If it is judged that a human hand is sensed, the heating element assembly 205 and the high-speed motor assembly are powered on, and the high-speed fan assembly 214 works to suck the air outside the hair dryer from the air inlet 225 of the air inlet net of the air inlet component, and blow it to the heating element assembly 205 of the fan assembly through the air duct 224, and then a strong cold or warm air flow is blown out from the air outlet 226 to quickly dry the hair or other things that need to be dried. When the human hand leaves the handle, the change in capacitance value is also sent to the main control chip circuit board assembly 207 for processing. If it is judged that the human hand is not in contact (touch) action, that is, when the human hand is not sensed, the heating element assembly 205 and the high-speed motor assembly are automatically powered off and stopped working.

[0029] The technical solution disclosed in this example can effectively avoid the safety hazards of high-speed hair dryers, is easy to operate, and improves user comfort. It also has a simple manufacturing process, is easy to install and produce, and has a low manufacturing cost.

[0030] It should be understood that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. For those skilled in the art, the technical solutions described in the above embodiments can be modified, or some of the technical features therein can be replaced by equivalents; and these modifications and replacements should all fall within the scope of protection of the claims attached to the present invention.

Claims

1. A hand-sensing high-speed hair dryer, comprising a nozzle assembly, a body assembly and a handle, wherein the nozzle assembly is connected to an air outlet of the body assembly; characterized in that: The handle comprises an insulating handle shell, a metal conductor arranged in the handle shell, and a touch chip circuit board assembly; the metal conductor is attached to the inner wall of the handle shell; the metal conductor is electrically connected to the touch chip circuit board assembly; the touch chip circuit board assembly is electrically connected to the main control chip circuit board assembly of the hair dryer; when the hair dryer is used by a person holding the handle, a capacitor is formed with the metal conductor in the handle shell, and when the person's hand is separated from the handle, the capacitance value of the capacitor changes, and the main control chip circuit board assembly detects the change of the capacitance value through the touch chip circuit board to control the working state of the hair dryer; The metal conductor is a closed structure surrounding the inner wall of the handle housing, and the shape of the closed structure is a shape that matches the cross-section of the handle inner cavity; there is a connecting arm extending outward on the annular structure, and the connecting arm is used to electrically connect with the touch chip circuit board assembly; The heating component of the fuselage component is arranged in the cavity of the main shell of the fuselage component, close to the air outlet side; the main control chip circuit board component is arranged on the bottom shell side of the main shell away from the air outlet in the inner cavity of the main shell.

2. The hand-sensing high-speed hair dryer according to claim 1, characterized in that: An air duct running vertically through the handle housing is provided in the air duct, and a high-speed fan assembly is provided in the air duct; the air outlet of the air duct is communicated with the air inlet of the fuselage assembly, and the air inlet of the air duct faces the air inlet component at the lower end of the handle.

3. The hand-sensing high-speed hair dryer according to claim 2, characterized in that: The air duct is formed by buckling a left air duct shell and a right air duct shell; the air duct and the high-speed fan assembly are interference-fitted so that the high-speed fan assembly is fastened in the air duct.

4. The hand-sensing high-speed hair dryer according to claim 2, characterized in that: The metal conductor and the touch chip circuit board assembly are located between the inner wall of the handle shell and the outer wall of the air duct.

5. The hand-sensing high-speed hair dryer according to claim 2, characterized in that: The air duct is located below the high-speed fan assembly and is surrounded by sound-absorbing cotton on the inner wall near the air inlet of the air duct.

6. The hand-sensing high-speed hair dryer according to claim 1, characterized in that: The handle is also provided with a switch button, and the switch button is electrically connected to the touch chip circuit board assembly.

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