CN211956262U

CN211956262U - Keyboard fan integrated configuration and electronic equipment

Info

Publication number: CN211956262U
Application number: CN202020140438.0U
Authority: CN
Inventors: 陈健德; 甄海涛; 袁思伟
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2020-01-21
Filing date: 2020-01-21
Publication date: 2020-11-17
Anticipated expiration: 2030-01-21

Abstract

The embodiment of the application provides a keyboard fan integrated configuration and electronic equipment, relates to electronic equipment technical field, can attenuate electronic equipment's thickness, and prevents to interfere fan blade work when knocking the keyboard. This keyboard fan integrated configuration includes: a substrate; a keyboard assembly disposed on a first side of the substrate; the fan assembly is arranged on the second side of the base plate and comprises a side plate, a fan blade and a baffle plate, the side plate is fixed on the second side of the base plate and is perpendicular to the base plate, the baffle plate is arranged on the end face, far away from the base plate, of the side plate, and the fan blade is arranged in a space defined by the base plate, the side plate and the baffle plate. The keyboard fan combined structure provided by the embodiment of the application can be used for realizing the keyboard input and heat dissipation functions of electronic equipment.

Description

Keyboard fan integrated configuration and electronic equipment

Technical Field

The application relates to the technical field of electronic equipment, in particular to a keyboard and fan combined structure and electronic equipment.

Background

A plurality of electronic components for realizing functions are arranged in the electronic equipment, and when the electronic equipment works, the electronic components receive electric energy to drive the electronic components to do work and generate heat. Along with the development of science and technology, electronic equipment especially mobile electronic equipment is more and more frivolous, and the inside space of electronic equipment is limited, and electronic components piles up together, and the condition of generating heat is more serious, consequently, in order to guarantee that electronic equipment normally works, the inside heat abstractor that needs to set up of electronic equipment corresponds, and general heat abstractor is the radiator fan subassembly.

Taking a representative mobile electronic device as an example, a notebook computer has an upper casing and a lower casing hinged together, the upper casing is internally provided with a display screen, and the lower casing is internally provided with electronic components (such as a processor, a main board, a memory, a hard disk, a battery, a speaker, etc.) and a fan module.

At present, each part in the lower shell is produced independently, and in combination assembly, the keyboard assembly and the fan module need certain assembly clearance in assembly, and the thickness of the electronic equipment can be increased. If the assembly clearance between keyboard subassembly and the fan module is eliminated, again when the user strikes the keyboard, the keyboard subassembly can be towards fan module deformation, and then can interfere the fan blade rotation in the fan module, has the potential safety hazard.

SUMMERY OF THE UTILITY MODEL

The embodiment of the application provides a keyboard fan integrated configuration and electronic equipment, can attenuate electronic equipment's thickness, and prevent to interfere the fan blade work when knocking the keyboard.

In order to achieve the above purpose, the embodiment of the present application adopts the following technical solutions:

in a first aspect, an embodiment of the present application provides a keyboard fan assembly structure, including:

a substrate;

a keyboard assembly disposed on a first side of the substrate;

the fan assembly is arranged on the second side of the base plate and comprises a side plate, a fan blade and a baffle plate, the side plate is fixed on the second side of the base plate and is perpendicular to the base plate, the baffle plate is arranged on the end face, far away from the base plate, of the side plate, and the fan blade is arranged in a space defined by the base plate, the side plate and the baffle plate.

The keyboard fan integrated configuration of this application embodiment, owing to set up the keyboard subassembly in the first side of base plate, set up the fan subassembly in the second side of base plate, and the curb plate of fan subassembly is fixed with the base plate, and perpendicular with the base plate, and the baffle setting keeps away from the terminal surface of base plate at the curb plate, and like this, base plate, curb plate and baffle enclose into the space of fan subassembly's installation fan blade. The keyboard component and the fan component are tightly combined, an assembly gap is not required to be arranged, and the thickness of the electronic equipment can be reduced; in addition, the base plate, the side plates and the baffle plate enclose a space for installing the fan blades of the fan assembly, compared with the conventional fan assembly, the end plate at one side of the fan assembly is removed, the base plate is used as a substitute, the thickness of the end plate can be saved, and the thickness of the electronic equipment can be reduced; moreover, curb plate and baffle all are fixed with the base plate, and the fan blade is installed in the space that base plate, curb plate and baffle enclose, and when the user knocked the keyboard, the base plate took place deformation, can drive curb plate, baffle and fan blade and take place deformation together, and then the problem of interference fan blade work can not appear.

In a first possible implementation manner of the first aspect, the side plate and the base plate may be fixed together by integrally forming the side plate and the base plate, or by separately manufacturing the side plate and the base plate and then fixing them together, and the fixing manner may be welding, clamping, bonding, and the like.

In a second possible implementation manner of the first aspect, the baffle is fixedly connected with the side plate to enclose an installation space of the fan blade, and the fixing manner may be various, such as welding, clamping, bonding, fastener connection, and the like. In order to facilitate assembly and easy maintenance, the baffle plate is detachably connected with the side plate. The baffle is fixedly connected with the side plate to form an installation space of the fan blade, and the fixing modes can be various, such as welding, clamping, bonding, fastener connection and the like. In order to facilitate assembly and easy maintenance, the baffle plate and the side plate can be detachably connected, and the detachable connection comprises clamping connection, fastener connection and the like.

In a third possible implementation manner of the first aspect, the baffle is connected with the side plate in a clamping manner. The clamping connection mode is convenient to install and easy to realize.

In a fourth possible implementation manner of the first aspect, the side plate is of an arc-shaped structure and has an air outlet opening, and a first air inlet is formed in a position, corresponding to the fan blade, on the substrate. The shape structure of curb plate can set up according to actual need, and is general, and the fan blade needs a circular space for the rotation, and needs have air intake and air outlet to guarantee the circulation of air in order to realize the heat dissipation. Therefore, the first air inlet is formed in the base plate, and the side plate is of an arc-shaped structure and is provided with an air outlet opening.

In a fifth possible implementation manner of the first aspect, a waterproof film is disposed between the substrate and the fan assembly, and the waterproof film is provided with a first avoiding hole corresponding to the first air inlet. In order to prevent from the keyboard and intake and cause the damage to the inside components and parts of electronic equipment, set up the water proof membrane, the water proof membrane can be ventilative water proof membrane, also can be corresponding first air intake and set up first hole of dodging to guarantee the air inlet effect of first air intake.

In a sixth possible implementation manner of the first aspect, a flexible circuit board for controlling keyboard input is disposed on the substrate corresponding to the keyboard assembly, and a second avoiding hole is disposed on the flexible circuit board corresponding to the first air inlet. In order to control the input information of the keyboard assembly, a flexible circuit board is laid on the position, corresponding to the keyboard assembly, of the substrate, and after the flexible circuit board is arranged, in order to guarantee air inlet of the first air inlet, a second avoiding hole is formed in the position, corresponding to the first air inlet, of the flexible circuit board.

In a seventh possible implementation manner of the first aspect, a second air inlet is formed in a position, corresponding to the fan blade, on the baffle. And a second air inlet can be formed in the baffle plate, so that air can be fed up and down to the fan assembly, and the heat dissipation effect is further improved.

In an eighth possible implementation manner of the first aspect, the second air inlet is located directly below the first air inlet. In addition, because the setting of first air intake, probably have the risk of intaking from first air intake, and the second air intake is located first air intake behind the below, when first air intake is intake, rivers can just the second air intake flow out, can not cause the influence to the inside electronic components of electronic equipment.

In a ninth possible implementation manner of the first aspect, the fan assembly is multiple. The fan assemblies can be a plurality of fan assemblies, and the fan assemblies are uniformly distributed on the second side of the substrate so as to dissipate heat of all places inside the electronic equipment.

In a tenth possible implementation manner of the first aspect, the fan blade is a centrifugal fan blade, and an axial direction of the centrifugal fan blade is arranged along a direction from the base plate to the baffle. The centrifugal fan blade can axially supply air and radially discharge air, so that the scheme is convenient to realize.

In an eleventh possible implementation manner of the first aspect, a fan blade mounting hole is formed in the baffle, and a rotating shaft of the fan blade penetrates through the mounting hole of the baffle.

In a second aspect, an embodiment of the present application provides an electronic device, including:

an upper shell;

a lower case; the lower casing is hinged with the upper casing, the lower casing comprises a palm support and a bottom cover which are mutually buckled, and a keyboard fan combined structure of any one of the first aspects is arranged in the lower casing.

The electronic equipment of this application embodiment is equipped with the arbitrary keyboard fan integrated configuration of first aspect in the under casing, consequently has and obtains beneficial effect equally, promptly, can attenuate electronic equipment's thickness, and prevents to interfere the fan blade work when knocking the keyboard.

In a first possible implementation manner of the second aspect, the bottom cover is provided with a third avoiding hole corresponding to the second air inlet of the keyboard and fan combination structure. After the keyboard fan combined structure is arranged in the lower shell, a keyboard assembly is arranged at a position corresponding to a first air inlet of the keyboard fan combined structure, and air can be fed from a gap between keys of the keyboard through the first air inlet; and the position of the second air inlet corresponding to the keyboard fan combined structure can be blocked by the bottom cover, so that a third avoiding hole is formed in the bottom cover corresponding to the second air inlet of the keyboard fan combined structure to ensure air inlet of the second air inlet.

In a second possible implementation manner of the second aspect, the lower casing is provided with a fourth avoidance hole corresponding to the air outlet opening of the keyboard and fan combination structure. The air outlet opening corresponding to the keyboard fan combination structure may be blocked by the side of the lower case, and therefore, a fourth avoiding hole needs to be formed to ensure heat dissipation and air outlet.

Drawings

Fig. 1 is a schematic structural diagram of a lower case of an electronic device provided in an embodiment of the present application;

fig. 2 is an exploded schematic structural diagram of a lower case of an electronic device according to an embodiment of the present disclosure;

fig. 3 is a schematic cross-sectional structure diagram of a keyboard fan assembly structure provided in an electronic device according to an embodiment of the present application;

fig. 4 is a schematic structural diagram of a keyboard fan assembly structure according to an embodiment of the present application;

fig. 5 is a schematic structural view of a keyboard assembly and a fan assembly provided in a lower case of a conventional electronic device at present;

FIG. 6 is a partially enlarged schematic view of FIG. 4;

fig. 7 is a schematic structural diagram of a baffle plate of a keyboard fan assembly structure according to an embodiment of the present application.

Reference numerals:

100-a lower shell; 101-palm support; 102-a bottom cover; 200-keyboard fan combined structure; 201-a substrate; 2011-first air intake; 202-a keyboard assembly; 203-a fan assembly; 213-side plate; 2131-an air outlet opening; 223-fan blades; 233-baffle; 2331-a second air intake; 2332-mounting holes; 204-flexible circuit board; 2041-a second avoidance hole; 300-touch panel.

Detailed Description

When the electronic equipment works, the internal electronic components can generate heat, and the performance of the electronic equipment can be ensured only by timely radiating the electronic components. The general heat dissipation method is a method of adopting an air-cooled fan assembly. Taking a notebook computer as an example, the quality of heat dissipation is directly related to the stability of product operation and the service life of the whole computer.

When the notebook computer is closed and horizontally placed with the front side facing upwards, four shells are arranged from top to bottom, which are commonly called as a computer top cover (A shell), a screen frame (B shell), a palm support (C shell) and a bottom cover (D shell), wherein the computer top cover and the screen frame are buckled and can be called as an upper shell, and the display screen is mainly protected; palm holds in the palm and the bottom lock, can be called the inferior valve, and inside all kinds of electronic components that have often, for example, treater, mainboard, memory, display card, hard disk and stereo set etc. palm holds in the palm the department and still is equipped with keyboard subassembly and touch components etc. that are used for input information. In order to dissipate heat, the fan assembly needs to be arranged in the space of the lower shell after the palm support and the bottom cover are buckled.

At present, the keyboard assembly and the fan module are separately produced, and a certain assembly gap is required when the keyboard assembly and the fan module are assembled in the lower case, so that the thickness of the electronic device is increased. If the assembly clearance between keyboard subassembly and the fan module is eliminated, again when the user strikes the keyboard, the keyboard subassembly can be towards fan module deformation, and then can interfere the fan blade rotation in the fan module, has the potential safety hazard.

An embodiment of the present application provides an electronic device, including:

an upper shell;

a lower case; the lower case is hinged to the upper case, and referring to fig. 1 and 2, the lower case 100 includes a palm rest 101 and a bottom cover 102 that are fastened to each other, and a keyboard fan assembly 200 is disposed in the lower case 100.

In the electronic device provided by the embodiment of the application, the keyboard and fan combined structure 200 arranged in the lower shell 100 combines the keyboard assembly 202 and the fan assembly 203 into a structure for production and assembly, so that the assembly gap between the keyboard assembly and the fan assembly can be eliminated, and the whole thickness of the electronic device can be reduced.

It should be noted that fig. 2 shows a specific structure in the lower case 100 of the notebook computer, and the keyboard fan assembly 200 is shown by being divided into two parts, namely a keyboard component 202 and a fan component 203, and in actual production and assembly, the keyboard component 202 and the fan component 203 are combined into one structure, namely, the keyboard fan assembly 200 is produced and assembled. The electronic device according to the embodiment of the present application may be any electronic device that needs to be provided with the keyboard assembly 202 and the fan assembly 203, for example, a notebook computer or a tablet computer protective case with a keyboard and a fan. In addition, as shown in fig. 1 and 2, the keyboard assembly 202 is generally installed on one side of the palm rest 101 of the lower casing 100, and a touch pad 300 may be further provided at the palm rest 101.

Implementation of the keyboard fan assembly structure 200, specifically, an embodiment of the present application provides a keyboard fan assembly structure 200, and with reference to fig. 3 and fig. 4, the keyboard fan assembly structure includes:

a substrate 201;

a keypad assembly 202 disposed on a first side of the substrate 201;

the fan assembly 203 is arranged on the second side of the substrate 201 and comprises a side plate 213, a fan blade 223 and a baffle plate 233, wherein the side plate 213 is fixed on the second side of the substrate 201 and is perpendicular to the substrate 201, the baffle plate 233 is arranged on the end face, away from the substrate 201, of the side plate 213, and the fan blade 223 is arranged in a space surrounded by the substrate 201, the side plate 213 and the baffle plate 233.

As shown in fig. 3 and 4, the keyboard fan assembly 200 of the embodiment of the application includes a keyboard assembly 202 disposed on a first side of a substrate 201, a fan assembly 203 disposed on a second side of the substrate 201, a side plate 213 of the fan assembly 203 fixed to the substrate 201 and perpendicular to the substrate 201, and a baffle 233 disposed on an end surface of the side plate 213 far from the substrate 201, so that the substrate 201, the side plate 213, and the baffle 233 enclose a space for installing a blade 223 of the fan assembly 203. With reference to fig. 5, in order to combine the keyboard assembly 202 and the fan assembly 203 tightly, in a conventional manner of assembling the keyboard assembly 202 and the fan assembly 203 with a mounting gap, compared with fig. 3 and 5, the keyboard and fan assembly 200 of the embodiment of the present application does not need to provide a mounting gap, and can reduce the thickness of the electronic device; in addition, the end plate on one side of the fan assembly 203 is removed, the substrate 201 is used as a substitute, the thickness of the end plate can be omitted, and the thickness of the electronic equipment can be reduced; moreover, the side plate 213 and the baffle plate 233 are fixed with the base plate 201, and the fan blades 223 are installed in the space surrounded by the base plate 201, the side plate 213 and the baffle plate 233, so that when a user strikes the keyboard, the base plate 201 deforms, the side plate 213, the baffle plate 233 and the fan blades 223 are driven to deform together, and the problem of interference in the work of the fan blades 223 cannot occur.

It should be noted that fig. 3 is a schematic cross-sectional structural diagram of a keyboard fan assembly 200 provided in an electronic device according to an embodiment of the present application; fig. 5 is a schematic structural view of a keyboard assembly 202 and a fan assembly 203 provided in a lower case of a conventional electronic apparatus at present. In comparison, it is obvious that the electronic device of the embodiment of the present application reduces the distance of the assembling gap between the keyboard assembly 202 and the fan assembly 203 in terms of thickness, and removes the thickness of the baffle 233 of the fan assembly 203 near the substrate 201, so that the overall thickness can be reduced. Experiments prove that the distance of the assembly gap between the original keyboard assembly 202 and the original fan assembly 203 can be thinned by 1 millimeter, and the thickness of the fan assembly 203 which is close to the side baffle 233 of the substrate 201 can be thinned by 1 millimeter, so that the electronic equipment in the embodiment of the application is thinned by 2 millimeters at least, and the effect is obvious.

The side plate 213 may be fixed to the substrate 201, the side plate 213 may be integrally formed with the substrate 201, or the side plate 213 and the substrate 201 may be manufactured separately and fixed together, and the fixing manner may be welding, clamping, bonding, or the like.

The baffle 233 is fixedly connected with the side plate 213 to form an installation space of the fan 223, and the fixing manner may be various, such as welding, clamping, bonding, fastener connection, and the like. The bezel 233 is detachably coupled to the side plate 213 for easy assembly and easy maintenance. Detachable connections include snap-fit, fastener connections, and the like.

The baffle 233 is snap-fit connected to the side plate 213. The clamping connection mode is convenient to install and easy to realize.

The shape and structure of the side plate 213 can be set according to actual needs, generally, the fan blade 223 needs a circular space for rotation, and an air inlet and an air outlet are needed to ensure air circulation to realize heat dissipation. Therefore, the first air inlet is disposed on the substrate 201, and the side plate 213 is of an arc structure and has an air outlet opening. That is, as shown in fig. 4 and fig. 6, the side plate 213 has an arc-shaped structure and has an air outlet opening 2131, and a first air inlet 2011 is disposed on the substrate 201 at a position corresponding to the fan 223.

In order to prevent the damage of the internal components of the electronic device caused by the water entering from the keyboard, a waterproof film is arranged between the substrate 201 and the fan assembly 203. After having set up the water proof membrane, the water proof membrane can be ventilative water proof membrane, also can be corresponding first air intake 2011 and set up the first hole of dodging to guarantee the air inlet effect of first air intake 2011.

In order to control input information of the keypad assembly 202, referring to fig. 4 and 6, a flexible circuit board 204 for controlling keypad input is provided on the substrate 201 corresponding to the keypad assembly 202. After the flexible circuit board 204 is disposed, in order to ensure the air intake of the first air intake 2011, the flexible circuit board 204 is provided with a second avoiding hole 2041 corresponding to the first air intake 2011.

It should be noted that, the waterproof film and the flexible circuit board 204 are both laid on the substrate 201 and disposed at a position corresponding to the keyboard assembly 202, in fig. 4 and fig. 6, the shape of the flexible circuit board 204 is indicated as a circle, which is a simple schematic partial cross-sectional view, and shows that the flexible circuit board 204 at the fan blade 223 is provided with a second avoiding hole 2041 corresponding to the first air inlet 2011; in addition, the second avoiding hole 2041 may be plural.

The baffle 233 may further be provided with a second air inlet, that is, the baffle 233 is provided with a second air inlet 2331 at a position corresponding to the fan blade 223. The air can be fed from the upper part to the lower part of the fan assembly 203, and the heat dissipation effect is further improved.

Referring to fig. 4, since the first intake port 2011 is provided, there may be a risk of water inflow from the first intake port 2011, and thus, in order to avoid the above problem, the second intake port 2331 is located directly below the first intake port 2011. After the second air inlet 2331 is located right below the first air inlet 2011, when the first air inlet 2011 enters water, water flows out of the second air inlet 2331, and electronic components inside the electronic device cannot be affected.

Referring to fig. 4, the fan assembly 203 may be plural. The fan assemblies 203 may be a plurality of fan assemblies, and are uniformly distributed on the second side of the substrate 201, so as to dissipate heat from various places inside the electronic device.

The fan 223 may be a centrifugal fan, and the axial direction of the centrifugal fan is arranged along the direction from the substrate 201 to the baffle 233. The centrifugal fan blade can axially supply air and radially discharge air, so that the scheme is convenient to realize.

In order to facilitate the installation of the fan blades 223, referring to fig. 4 and 7, the baffle plate 233 is provided with a fan blade 223 installation hole 2332, so that a rotating shaft of the fan blade 223 can pass through the installation hole 2332 of the baffle plate 233.

In the electronic device according to the embodiment of the present application, after the keyboard fan assembly structure 200 is disposed in the lower case 100, the position corresponding to the first air inlet 2011 of the keyboard fan assembly structure 200 is the keyboard assembly 202, and the first air inlet 2011 can intake air from the gap between the keys of the keyboard assembly 202; the position of the second air inlet 2331 corresponding to the keyboard fan assembly 200 is blocked by the bottom cover 102, so that a third avoiding hole may be formed in the bottom cover 102 corresponding to the second air inlet 2331 of the keyboard fan assembly 200 to ensure the air inlet of the second air inlet 2331.

Similarly, a fourth avoiding hole may be formed in the lower case 100 corresponding to the air outlet 2131 of the keyboard fan assembly 200. The air outlet 2131 corresponding to the keyboard fan assembly structure 200 may be blocked by the side of the lower case 100, and therefore, a fourth avoiding hole may be formed to ensure heat dissipation and air outlet.

It should be noted that, in the electronic device according to the embodiment of the present application, the keyboard fan assembly structure 200 is disposed in the lower case 100, and the specific air inlet and outlet structure thereof can be set according to actual needs. For example, the first air inlet 2011 and the second air inlet 2331 may be disposed, so that the electronic device exhibits a heat dissipation structure with an upper air inlet, a lower air inlet, and a side air outlet, which may improve a heat dissipation effect.

In addition, since the keyboard fan assembly 200 combines the keyboard assembly 202 and the fan assembly 203 into an integral component, the path of air intake from the keyboard assembly 202 is shortened, and the heat dissipation effect is further improved.

In order to verify the heat dissipation effect of the electronic device keyboard fan combination structure 200 according to the embodiment of the present application, it has been detected that thermal imaging is performed on the palm rest 101 surface of the electronic device in the operating state in fig. 3 (the keyboard fan combination structure 200) and fig. 5 (the keyboard assembly 202 and the fan assembly 203 are installed at intervals), for example clarity, referring to fig. 1, temperature measurement is performed on points a (left side of the keyboard), points b (above the palm rest), points c (middle part of the keyboard), points d (right side of the keyboard), points e (left side of the touch pad) and points f (right side of the touch pad) of the palm rest 101 surfaces in the two schemes, and specific data are shown in table one below. Data unit in table: and C.

	Point a	Point b	Point c	d point	e point	f point
							FIG. 5 scheme	40.2	47.6	46.1	39.6	35.9	36
FIG. 3 scheme	37.3	44.8	44.2	36.8	34.1	34.1
							Benefit of temperature reduction	2.9	2.8	1.9	2.8	1.8	1.9

Watch 1

It can be seen from table one that the keyboard direct air intake has a good effect on the temperature drop of the whole palm support 101 surface and the system interior, the whole temperature drop is fast, and the whole temperature can be expected to drop by 5-10%. Therefore, when the electronic device works, the operation of the whole fan of the fan assembly 203 can properly reduce the rotating speed and the operation time, the wind noise can be reduced on the premise of ensuring the temperature reduction, and a user can have better touch feeling and lower noise when operating the computer, so that the product is more competitive.

In the description herein, particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A keyboard fan integrated configuration, characterized by, includes:

a substrate;

a keyboard assembly disposed on a first side of the substrate;

2. The keyboard fan assembly of claim 1, wherein the side panel is integrally formed with the base panel.

3. The keyboard fan assembly of claim 1, wherein the baffle is removably attached to the side panel.

4. The keyboard fan assembly of claim 3, wherein the baffle is snap-fit to the side panel.

5. The keyboard fan assembly structure of any one of claims 1 to 4, wherein the side plate is an arc-shaped structure and has an air outlet opening, and the substrate is provided with a first air inlet corresponding to the fan blade.

6. The keyboard fan composite structure of claim 5, wherein a waterproof membrane is disposed between the substrate and the fan assembly, and the waterproof membrane is provided with a first avoiding hole corresponding to the first air inlet.

7. The keyboard fan composite structure of claim 5, wherein a flexible circuit board for controlling keyboard input is disposed on the substrate corresponding to the keyboard assembly, and a second avoiding hole is disposed on the flexible circuit board corresponding to the first air inlet.

8. The keyboard fan assembly structure of claim 5, wherein the baffle plate is provided with a second air inlet corresponding to the fan blade.

9. The keyboard fan assembly structure of claim 6, wherein the baffle plate is provided with a second air inlet corresponding to the fan blade.

10. The keyboard fan assembly structure of claim 7, wherein the baffle plate is provided with a second air inlet at a position corresponding to the fan blades.

11. The keyboard fan assembly structure of claim 8, wherein the second air inlet is located directly below the first air inlet.

12. The keyboard fan assembly structure of claim 9, wherein the second air inlet is located directly below the first air inlet.

13. The keyboard fan assembly structure of claim 10, wherein the second air inlet is located directly below the first air inlet.

14. The keyboard fan assembly structure of claim 1, wherein the number of fan assemblies is plural, and the plural fan assemblies are uniformly distributed on the second side of the substrate.

15. The keyboard fan assembly structure of claim 1, wherein the blades are centrifugal blades, and the axial direction of the centrifugal blades is arranged along the direction from the substrate to the baffle.

16. The keyboard fan assembly structure of claim 15, wherein the baffle is provided with fan blade mounting holes, and the rotating shaft of the fan blade passes through the mounting holes of the baffle.

17. An electronic device, comprising:

an upper shell;

a lower case; the lower shell is hinged with the upper shell and comprises a palm support and a bottom cover which are mutually buckled, and the keyboard fan combination structure as claimed in any one of claims 1 to 16 is arranged in the lower shell.