CN111696798A - A combination switch for a hair dryer - Google Patents

Abstract

The invention discloses a combined switch for a hair drier, which comprises a switch base, a key combination board and a switch cover board, wherein a plurality of grooves and a slideway are arranged in the switch base; the key combination board is attached to the upper end face of the switch base, and a plurality of keys connected through elastic sheets are arranged on the key combination board; the key combination board is also provided with a long slot hole, a sliding key is arranged in the long slot hole, the key is matched with the switch control board in the groove to work, and the sliding key can move along the slideway after being connected with the switch control board in the slideway; the switch cover plate is fixed with the switch base and the key combination plate into a whole, and the switch cover plate is provided with mounting holes for accommodating keys and sliding keys. According to the invention, the plurality of keys are integrated on the key combination board, and the switch base, the key combination board and the switch cover board are fixed into a whole, so that the installation difficulty of the whole hair dryer is reduced.

Description

A combination switch for a hair dryer

technical field

The invention belongs to the technical field of hair drying devices, and particularly relates to a combination switch for a hair dryer.

Background technique

A hair dryer generally includes an air duct and a handle, the air duct is provided with a heating wire assembly, and the air duct or the handle is provided with a motor with fan blades. When in use, the motor drives the rotor to drive the fan blade to rotate. When the fan blade rotates, the air is sucked in from the air inlet, and the centrifugal airflow formed thereby is blown out from the front end of the fan cylinder. When the air passes through, if the heating wire installed in the air duct has been energized and heated, the front end of the air duct will blow hot air; if the heating wire is not energized and heated, it will blow out cold air.

There are usually multiple buttons on the handle of the hair dryer, including a power button, a button to control the air volume, and a button to control the temperature. These buttons are independent of each other and are installed on the handle separately. When assembling the hair dryer, it takes a lot of time to install each independent button, which increases the installation time and reduces the assembly efficiency.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a combination switch for a hair dryer that can reduce the installation difficulty of keys and can be assembled quickly.

To this end, the technical solution of the present invention is: a combination switch for a hair dryer, which is characterized in that it includes a switch base, a key combination board and a switch cover, the upper end surface of the switch base is an arc structure, and the inside of the switch base is an arc structure. There are a plurality of grooves and a slideway, and a switch control board is placed in the groove and the slideway. There is an opening, the key is placed in the opening, and is connected with the key combination board through the elastic sheet; the key combination board is also provided with a long slot hole, and a sliding key is placed in the long slot hole, the key, the sliding key and the switch base The positions of the grooves and slides on the slide correspond to each other, and the buttons work together with the switch control board in the groove. After the sliding keys are connected with the switch control board in the slide, they can move along the slide; the switch cover is an arc structure. , which is fixed into one body with the switch base and the key combination board, and the switch cover is provided with installation holes for accommodating keys and sliding keys.

Preferably, the number of keys on the key combination board is consistent with the number of grooves in the switch base, and the positions are in one-to-one correspondence; the long slot holes on the key combination board correspond to the positions of the slideways in the switch base, and the sliding The key is placed in the slotted hole.

Preferably, three grooves are arranged in the switch base, and a rectangular slide is arranged under the grooves; there are 3 keys on the key combination board, and the elastic sheet and the key combination board pass through the bottom of the keys. connected; the long slot holes on the key combination board are located below the keys.

The combination switch of the present invention is installed on the handle of the hair dryer, an opening is opened on the handle, the upper and lower ends of the switch cover are fixed at the opening of the handle by screws, and the switch cover is tightly fitted with the opening of the handle, and there is a The sealing film keeps the air duct inside the handle sealed.

Each key on the key combination board includes a wind speed control switch, an air temperature control switch and an alternate switch of cold and hot air, and the sliding key is a power switch. The three buttons are arranged in a zigzag pattern and are installed on the button combination board through the spring sheet. Press the button to make the button contact with each switch control board in the groove on the switch base, and the switch control board is connected to the control module of the hair dryer through wires. , so as to have the effect of changing the wind speed, wind temperature, and switching between hot and cold air. After releasing the button, the spring plate can drive the button to reset. The sliding key is placed in the long slotted hole on the key combination board and can move along the long slotted hole. The slideway of the switch base is provided with a power switch control board. The sliding key is connected and fixed with the power switch control board, and drives the power switch control board along The slideway slides, and the power switch control board is connected to the control module of the hair dryer through wires, so as to start the hair dryer or turn off the hair dryer.

The invention integrates a plurality of keys on the key combination board, and uses a spring sheet to connect the keys, which is convenient for pressing and resetting the keys, and the switch base, the key combination board and the switch cover are fixed as a whole. It can be installed on the handle, which reduces the installation difficulty of the entire hair dryer; after the switch cover and the switch base are fixed as one, there is no need to fill too much sealing rubber at the button, which greatly reduces the weight and cost of the handle.

Description of drawings

Further detailed description will be given below in conjunction with the accompanying drawings and the embodiments of the present invention

Figure 1 is an exploded view of the parts of the hair dryer;

Fig. 2 is the structural sectional view of the hair dryer;

Fig. 3 is the structural representation of handle;

Fig. 4 is the structural representation of switch base;

Fig. 5 is the structural representation of the key combination board;

6 is a schematic structural diagram of a switch cover;

7 is a schematic structural diagram of a motor cover;

FIG. 8 is a schematic structural diagram of a power line card board.

Marked in the figure: air duct 1, outer air duct 11, air outlet duct 12, first annular air outlet 121, second air outlet 122, primary air duct 13, annular mounting surface 131, rotating buckle 132, second inlet Air outlet 133, air duct joint 14, magnetic ring 15, annular cavity 16, handle 2, first opening 21, second opening 22, air guide groove 23, air inlet 24, heating wire assembly 3, control module 4, motor 5 , motor cover 51, motor limit block 52, fan blade 53, switch base 61, groove 611, slide 612, key combination board 62, elastic sheet 621, long slot 622, switch cover 63, first installation Hole 631 , second mounting hole 632 , key 64 , sliding key 65 , power cable card board 7 , cable card hole 71 , notch 72 , snap ring 73 , power cable 8 , inner filter 91 , outer filter 92 .

Detailed ways

See attached image. The hair dryer described in this embodiment includes an air duct 1 and a handle 2. The air duct 1 is made of plastic material, such as PC or nylon, and the handle 2 is made of alloy material, such as aluminum alloy or magnesium alloy. It is integrated with the handle, and this material selection makes the hair dryer lighter and stronger.

The air duct 1 includes an inner air duct and an outer air duct 11 arranged coaxially, and an annular cavity 16 is formed between the outer wall of the inner air duct and the inner wall of the outer air duct; The primary air duct 13 is formed, and the two are connected by an air duct joint 14. The front end of the air outlet duct 12 is also covered with a magnetic ring 15, which is used to magnetically connect blowing nozzles of various shapes; the air outlet duct 12 and the primary air duct 13 are arranged Inside the outer air duct 11, the end of the primary air duct 13 is provided with an annular mounting surface 131, which is fixedly connected with the rear of the outer air duct 11 through a rotating buckle 132, so that the rear end of the annular cavity is closed; the front end of the air outlet duct 12 A first annular air outlet 121 is provided, which is communicated with the annular cavity 16; the interior of the air outlet duct 12 and the primary air duct 13 is the second air inlet channel, and the tail of the primary air duct 13 is the second air inlet 133, and the air outlet duct Inside the front end of 12 is a second air outlet 122 .

The air cylinder 1 is also provided with a heating wire assembly 3 and a control module 4. The heating wire assembly 3 includes a tubular support and a heating wire wound around the support. Inside the annular cavity 16 between them; the control module 4 is an annular structure and is sleeved on the outside of the primary air duct 13 , and the control module is electrically connected to the motor and the heating wire assembly.

The angle between the handle 2 and the direction of the first annular air outlet at the front end of the air duct 1 is 93 degrees, that is, the handle is inclined 3 degrees relative to the vertical line of the air duct, and is inclined toward the rear end of the air duct, and the handle and the air duct are parallel to each other. Not a vertical relationship, with a 3-degree inclination, ergonomic, not tired hands during prolonged use. The handle has an elliptical structure, which is more convenient to grasp the handle. The inner circumferential wall of the handle 2 is provided with axially distributed air guide grooves 23 . The inside of the handle 2 is an air inlet channel, which is communicated with the annular cavity 16 inside the air duct 1, so that the air entering under the handle can be blown out from the first annular air outlet.

There is an air inlet 24 below the handle 2, and an inner filter 91 and an outer filter 92 are sleeved at the air inlet; the bottom of the handle 2 is provided with a power cord clamp 7, which is a ring structure, consisting of two. It is composed of a semi-circular ring structure, with a clamping hole 71 in the middle; a plurality of recessed notches 72 are arranged on the upper end surface of the power cable clamping plate; a ring of protruding clamping rings is arranged in the clamping hole in the middle of the power cable clamping plate 73. The port of the power cord 8 is clamped by the snap ring 73 in the middle of the power cord card board and fixed in the cord hole 72. Then the power cord 8 is routed along the air guide groove 23 on the inner wall of the handle, and extends into the air duct 1, and is connected to the control panel. The module 4 is electrically connected.

The side of the handle 2 is provided with two axially distributed first openings 21 and second openings 22, the first opening 21 is located above the second opening 22, the combination switch is installed in the first opening 21, and the motor is installed in the second opening 22 5.

The combination switch includes a switch base 61, a key combination plate 62 and a switch cover plate 63. The upper end surface of the switch base 61 is an arc structure, and three grooves 611 are arranged in the switch base. There is a rectangular slideway 612, and a switch control board is placed in the groove and the slideway; the key combination board 62 is an arc structure, which is in contact with the upper end surface of the switch base 61, and the key combination board 62 is provided with 3 openings , 3 buttons 64 are placed in the opening, and the bottom of the button 64 is connected with the button combination board 62 through the elastic sheet 621; The plate 62 is also provided with a long slot hole 622, and a sliding key 65 is placed in the long slot hole. , the button and the switch control board in the groove work together, and the sliding button can move along the slide after being connected with the switch control board in the slide; the switch cover 63 is an arc structure, which is connected with the switch base 61 and the key combination board. The switch cover 63 is provided with a first mounting hole 631 for accommodating keys and a second mounting hole 632 for accommodating sliding keys. The switch cover 63 and the first opening 21 are fixed by screws, and a sealing film is provided between the two.

The motor 5 is built in the second opening 22, the fan blade 53 is installed on the motor shaft, and the motor cover plate 51 is provided at the second opening 22. The motor cover plate 51 is an arc structure, and two There are two motor limit blocks 52, and the motor 5 is located between the two motor limit blocks 52 to prevent the motor from sliding. The motor cover plate 51 and the second opening 22 of the handle are fixed by screws, and a sealing film is arranged therebetween.

When in use, slide the power switch, the control module 4 starts the motor 5, and the motor 5 drives the fan blade 53 to rotate, so that the air enters from the air inlet 24 under the handle 2, and enters between the inner and outer air ducts through the air inlet channel inside the handle 2. In the annular cavity 16, the heating wire assembly 3 is blown out from the first annular air outlet. If the heating wire installed in the air duct has been energized and heated, the front end of the air duct blows out hot air; if the heating wire is not energized and heated, it blows out cold air.

According to Bernoulli's principle, when the flow is constant, the flow velocity is large and the pressure is small. When the front end of the air duct blows air, the air velocity at the front end of the air duct is significantly greater than the air velocity at the rear end of the air duct, which means that the pressure at the front end of the air duct is smaller than that at the rear end of the air duct. The inside of the air duct is blown out from the front end of the air duct, thereby increasing the air output of the blower.

Claims (3)

1. A combination switch for a hair dryer is characterized in that: comprising a switch base, a key combination plate and a switch cover, the upper end face of the switch base is an arc structure, and a plurality of grooves and a switch base are provided in the switch base. The slideway, a switch control board is placed in the groove and the slideway; the key combination board is an arc structure, which is in contact with the upper end surface of the switch base, the key combination board is provided with a plurality of openings, and the keys are placed in the openings , connected with the key combination board through the elastic sheet; the key combination board is also provided with a long slot hole, and a sliding key is placed in the long slot hole, the key, the sliding key and the groove on the switch base, the position of the slideway Correspondingly, the keys work together with the switch control board in the groove, and the sliding key can move along the slide after being connected with the switch control board in the slide; the switch cover is an arc structure, which is connected with the switch base and the key combination board. It is fixed as a whole, and the switch cover is provided with installation holes for accommodating keys and sliding keys. 2. A combination switch for a hair dryer according to claim 1, characterized in that: the number of keys on the key combination board is consistent with the number of grooves in the switch base, and the positions correspond one-to-one; The long slot hole on the key combination board corresponds to the position of the slideway in the switch base, and the sliding key is placed in the long slot hole. 3. A combination switch for a hair dryer as claimed in claim 1, characterized in that: the switch base is provided with three grooves arranged in a zigzag shape, and a rectangular slide is provided under the groove; the The key combination board is provided with three keys, and the lower part of the keys is connected with the key combination board through an elastic sheet; the long slot holes on the key combination board are located under the keys.

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